Christoph Hellwig | bc50ad7 | 2019-02-18 09:36:29 +0100 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0 |
Christoph Hellwig | 21d3471 | 2015-11-26 09:08:36 +0100 | [diff] [blame] | 2 | /* |
| 3 | * NVM Express device driver |
| 4 | * Copyright (c) 2011-2014, Intel Corporation. |
Christoph Hellwig | 21d3471 | 2015-11-26 09:08:36 +0100 | [diff] [blame] | 5 | */ |
| 6 | |
| 7 | #include <linux/blkdev.h> |
| 8 | #include <linux/blk-mq.h> |
Nick Bowler | c95b708 | 2020-03-28 01:09:09 -0400 | [diff] [blame] | 9 | #include <linux/compat.h> |
Christoph Hellwig | 5fd4ce1 | 2015-11-28 15:03:49 +0100 | [diff] [blame] | 10 | #include <linux/delay.h> |
Christoph Hellwig | 21d3471 | 2015-11-26 09:08:36 +0100 | [diff] [blame] | 11 | #include <linux/errno.h> |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 12 | #include <linux/hdreg.h> |
Christoph Hellwig | 21d3471 | 2015-11-26 09:08:36 +0100 | [diff] [blame] | 13 | #include <linux/kernel.h> |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 14 | #include <linux/module.h> |
Mikhail Skorzhinskii | 958f2a0 | 2019-07-04 09:59:18 +0200 | [diff] [blame] | 15 | #include <linux/backing-dev.h> |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 16 | #include <linux/list_sort.h> |
Christoph Hellwig | 21d3471 | 2015-11-26 09:08:36 +0100 | [diff] [blame] | 17 | #include <linux/slab.h> |
| 18 | #include <linux/types.h> |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 19 | #include <linux/pr.h> |
| 20 | #include <linux/ptrace.h> |
| 21 | #include <linux/nvme_ioctl.h> |
Andy Lutomirski | c5552fd | 2017-02-07 10:08:45 -0800 | [diff] [blame] | 22 | #include <linux/pm_qos.h> |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 23 | #include <asm/unaligned.h> |
Christoph Hellwig | 21d3471 | 2015-11-26 09:08:36 +0100 | [diff] [blame] | 24 | |
| 25 | #include "nvme.h" |
Sagi Grimberg | 038bd4c | 2016-06-13 16:45:28 +0200 | [diff] [blame] | 26 | #include "fabrics.h" |
Christoph Hellwig | 21d3471 | 2015-11-26 09:08:36 +0100 | [diff] [blame] | 27 | |
Hannes Reinecke | 35fe0d1 | 2019-07-24 15:47:55 +0200 | [diff] [blame] | 28 | #define CREATE_TRACE_POINTS |
| 29 | #include "trace.h" |
| 30 | |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 31 | #define NVME_MINORS (1U << MINORBITS) |
| 32 | |
Marc Olson | 8ae4e44 | 2017-09-06 17:23:56 -0700 | [diff] [blame] | 33 | unsigned int admin_timeout = 60; |
| 34 | module_param(admin_timeout, uint, 0644); |
Ming Lin | ba0ba7d | 2016-02-10 10:03:30 -0800 | [diff] [blame] | 35 | MODULE_PARM_DESC(admin_timeout, "timeout in seconds for admin commands"); |
Ming Lin | 576d55d | 2016-02-10 10:03:32 -0800 | [diff] [blame] | 36 | EXPORT_SYMBOL_GPL(admin_timeout); |
Ming Lin | ba0ba7d | 2016-02-10 10:03:30 -0800 | [diff] [blame] | 37 | |
Marc Olson | 8ae4e44 | 2017-09-06 17:23:56 -0700 | [diff] [blame] | 38 | unsigned int nvme_io_timeout = 30; |
| 39 | module_param_named(io_timeout, nvme_io_timeout, uint, 0644); |
Ming Lin | ba0ba7d | 2016-02-10 10:03:30 -0800 | [diff] [blame] | 40 | MODULE_PARM_DESC(io_timeout, "timeout in seconds for I/O"); |
Ming Lin | 576d55d | 2016-02-10 10:03:32 -0800 | [diff] [blame] | 41 | EXPORT_SYMBOL_GPL(nvme_io_timeout); |
Ming Lin | ba0ba7d | 2016-02-10 10:03:30 -0800 | [diff] [blame] | 42 | |
Christoph Hellwig | b3b1b0b | 2017-06-12 18:30:51 +0200 | [diff] [blame] | 43 | static unsigned char shutdown_timeout = 5; |
Ming Lin | ba0ba7d | 2016-02-10 10:03:30 -0800 | [diff] [blame] | 44 | module_param(shutdown_timeout, byte, 0644); |
| 45 | MODULE_PARM_DESC(shutdown_timeout, "timeout in seconds for controller shutdown"); |
| 46 | |
Christoph Hellwig | 44e44b2 | 2017-04-05 19:18:11 +0200 | [diff] [blame] | 47 | static u8 nvme_max_retries = 5; |
| 48 | module_param_named(max_retries, nvme_max_retries, byte, 0644); |
Keith Busch | f80ec96 | 2016-07-12 16:20:31 -0700 | [diff] [blame] | 49 | MODULE_PARM_DESC(max_retries, "max number of retries a command may have"); |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 50 | |
Kai-Heng Feng | 9947d6a | 2017-06-07 15:25:43 +0800 | [diff] [blame] | 51 | static unsigned long default_ps_max_latency_us = 100000; |
Andy Lutomirski | c5552fd | 2017-02-07 10:08:45 -0800 | [diff] [blame] | 52 | module_param(default_ps_max_latency_us, ulong, 0644); |
| 53 | MODULE_PARM_DESC(default_ps_max_latency_us, |
| 54 | "max power saving latency for new devices; use PM QOS to change per device"); |
| 55 | |
Andy Lutomirski | c35e30b | 2017-04-21 16:19:24 -0700 | [diff] [blame] | 56 | static bool force_apst; |
| 57 | module_param(force_apst, bool, 0644); |
| 58 | MODULE_PARM_DESC(force_apst, "allow APST for newly enumerated devices even if quirked off"); |
| 59 | |
Jens Axboe | f5d1184 | 2017-06-27 12:03:06 -0600 | [diff] [blame] | 60 | static bool streams; |
| 61 | module_param(streams, bool, 0644); |
| 62 | MODULE_PARM_DESC(streams, "turn on support for Streams write directives"); |
| 63 | |
Roy Shterman | b227c59 | 2018-01-14 12:39:02 +0200 | [diff] [blame] | 64 | /* |
| 65 | * nvme_wq - hosts nvme related works that are not reset or delete |
| 66 | * nvme_reset_wq - hosts nvme reset works |
| 67 | * nvme_delete_wq - hosts nvme delete works |
| 68 | * |
Nigel Kirkland | 97b2512 | 2020-02-10 16:01:45 -0800 | [diff] [blame] | 69 | * nvme_wq will host works such as scan, aen handling, fw activation, |
| 70 | * keep-alive, periodic reconnects etc. nvme_reset_wq |
Roy Shterman | b227c59 | 2018-01-14 12:39:02 +0200 | [diff] [blame] | 71 | * runs reset works which also flush works hosted on nvme_wq for |
| 72 | * serialization purposes. nvme_delete_wq host controller deletion |
| 73 | * works which flush reset works for serialization. |
| 74 | */ |
Sagi Grimberg | 9a6327d | 2017-06-07 20:31:55 +0200 | [diff] [blame] | 75 | struct workqueue_struct *nvme_wq; |
| 76 | EXPORT_SYMBOL_GPL(nvme_wq); |
| 77 | |
Roy Shterman | b227c59 | 2018-01-14 12:39:02 +0200 | [diff] [blame] | 78 | struct workqueue_struct *nvme_reset_wq; |
| 79 | EXPORT_SYMBOL_GPL(nvme_reset_wq); |
| 80 | |
| 81 | struct workqueue_struct *nvme_delete_wq; |
| 82 | EXPORT_SYMBOL_GPL(nvme_delete_wq); |
| 83 | |
Christoph Hellwig | ab9e00c | 2017-11-09 13:48:55 +0100 | [diff] [blame] | 84 | static LIST_HEAD(nvme_subsystems); |
| 85 | static DEFINE_MUTEX(nvme_subsystems_lock); |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 86 | |
Christoph Hellwig | 9843f68 | 2017-10-18 13:10:01 +0200 | [diff] [blame] | 87 | static DEFINE_IDA(nvme_instance_ida); |
Christoph Hellwig | a6a5149 | 2017-10-18 16:59:25 +0200 | [diff] [blame] | 88 | static dev_t nvme_chr_devt; |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 89 | static struct class *nvme_class; |
Christoph Hellwig | ab9e00c | 2017-11-09 13:48:55 +0100 | [diff] [blame] | 90 | static struct class *nvme_subsys_class; |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 91 | |
Keith Busch | 240e6ee | 2020-06-29 12:06:41 -0700 | [diff] [blame] | 92 | static int _nvme_revalidate_disk(struct gendisk *disk); |
Jianchao Wang | 12d9f07 | 2018-05-04 16:01:57 +0800 | [diff] [blame] | 93 | static void nvme_put_subsystem(struct nvme_subsystem *subsys); |
Scott Bauer | cf39a6b | 2018-06-29 13:03:28 -0600 | [diff] [blame] | 94 | static void nvme_remove_invalid_namespaces(struct nvme_ctrl *ctrl, |
| 95 | unsigned nsid); |
| 96 | |
| 97 | static void nvme_set_queue_dying(struct nvme_ns *ns) |
| 98 | { |
| 99 | /* |
| 100 | * Revalidating a dead namespace sets capacity to 0. This will end |
| 101 | * buffered writers dirtying pages that can't be synced. |
| 102 | */ |
Christoph Hellwig | 3913f4f | 2020-07-08 16:18:27 +0200 | [diff] [blame] | 103 | if (test_and_set_bit(NVME_NS_DEAD, &ns->flags)) |
Scott Bauer | cf39a6b | 2018-06-29 13:03:28 -0600 | [diff] [blame] | 104 | return; |
Scott Bauer | cf39a6b | 2018-06-29 13:03:28 -0600 | [diff] [blame] | 105 | blk_set_queue_dying(ns->queue); |
| 106 | /* Forcibly unquiesce queues to avoid blocking dispatch */ |
| 107 | blk_mq_unquiesce_queue(ns->queue); |
Balbir Singh | b224726 | 2019-09-18 00:27:20 +0000 | [diff] [blame] | 108 | /* |
| 109 | * Revalidate after unblocking dispatchers that may be holding bd_butex |
| 110 | */ |
| 111 | revalidate_disk(ns->disk); |
Scott Bauer | cf39a6b | 2018-06-29 13:03:28 -0600 | [diff] [blame] | 112 | } |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 113 | |
Christoph Hellwig | 50e8d8e | 2018-05-25 18:15:47 +0200 | [diff] [blame] | 114 | static void nvme_queue_scan(struct nvme_ctrl *ctrl) |
| 115 | { |
| 116 | /* |
| 117 | * Only new queue scan work when admin and IO queues are both alive |
| 118 | */ |
Keith Busch | 5d02a5c | 2019-09-03 09:22:24 -0600 | [diff] [blame] | 119 | if (ctrl->state == NVME_CTRL_LIVE && ctrl->tagset) |
Christoph Hellwig | 50e8d8e | 2018-05-25 18:15:47 +0200 | [diff] [blame] | 120 | queue_work(nvme_wq, &ctrl->scan_work); |
| 121 | } |
| 122 | |
Keith Busch | 4c75f87 | 2019-09-06 11:23:08 -0600 | [diff] [blame] | 123 | /* |
| 124 | * Use this function to proceed with scheduling reset_work for a controller |
| 125 | * that had previously been set to the resetting state. This is intended for |
| 126 | * code paths that can't be interrupted by other reset attempts. A hot removal |
| 127 | * may prevent this from succeeding. |
| 128 | */ |
Keith Busch | c1ac9a4b | 2019-09-04 10:06:11 -0600 | [diff] [blame] | 129 | int nvme_try_sched_reset(struct nvme_ctrl *ctrl) |
Keith Busch | 4c75f87 | 2019-09-06 11:23:08 -0600 | [diff] [blame] | 130 | { |
| 131 | if (ctrl->state != NVME_CTRL_RESETTING) |
| 132 | return -EBUSY; |
| 133 | if (!queue_work(nvme_reset_wq, &ctrl->reset_work)) |
| 134 | return -EBUSY; |
| 135 | return 0; |
| 136 | } |
Keith Busch | c1ac9a4b | 2019-09-04 10:06:11 -0600 | [diff] [blame] | 137 | EXPORT_SYMBOL_GPL(nvme_try_sched_reset); |
Keith Busch | 4c75f87 | 2019-09-06 11:23:08 -0600 | [diff] [blame] | 138 | |
Christoph Hellwig | d86c4d8 | 2017-06-15 15:41:08 +0200 | [diff] [blame] | 139 | int nvme_reset_ctrl(struct nvme_ctrl *ctrl) |
| 140 | { |
| 141 | if (!nvme_change_ctrl_state(ctrl, NVME_CTRL_RESETTING)) |
| 142 | return -EBUSY; |
Roy Shterman | b227c59 | 2018-01-14 12:39:02 +0200 | [diff] [blame] | 143 | if (!queue_work(nvme_reset_wq, &ctrl->reset_work)) |
Christoph Hellwig | d86c4d8 | 2017-06-15 15:41:08 +0200 | [diff] [blame] | 144 | return -EBUSY; |
| 145 | return 0; |
| 146 | } |
| 147 | EXPORT_SYMBOL_GPL(nvme_reset_ctrl); |
| 148 | |
Sagi Grimberg | 79c48cc | 2018-01-14 12:39:00 +0200 | [diff] [blame] | 149 | int nvme_reset_ctrl_sync(struct nvme_ctrl *ctrl) |
Christoph Hellwig | d86c4d8 | 2017-06-15 15:41:08 +0200 | [diff] [blame] | 150 | { |
| 151 | int ret; |
| 152 | |
| 153 | ret = nvme_reset_ctrl(ctrl); |
Nitzan Carmi | 8000d1f | 2018-01-17 11:01:14 +0000 | [diff] [blame] | 154 | if (!ret) { |
Christoph Hellwig | d86c4d8 | 2017-06-15 15:41:08 +0200 | [diff] [blame] | 155 | flush_work(&ctrl->reset_work); |
Keith Busch | 5d02a5c | 2019-09-03 09:22:24 -0600 | [diff] [blame] | 156 | if (ctrl->state != NVME_CTRL_LIVE) |
Nitzan Carmi | 8000d1f | 2018-01-17 11:01:14 +0000 | [diff] [blame] | 157 | ret = -ENETRESET; |
| 158 | } |
| 159 | |
Christoph Hellwig | d86c4d8 | 2017-06-15 15:41:08 +0200 | [diff] [blame] | 160 | return ret; |
| 161 | } |
Sagi Grimberg | 79c48cc | 2018-01-14 12:39:00 +0200 | [diff] [blame] | 162 | EXPORT_SYMBOL_GPL(nvme_reset_ctrl_sync); |
Christoph Hellwig | d86c4d8 | 2017-06-15 15:41:08 +0200 | [diff] [blame] | 163 | |
Bart Van Assche | a686ed7 | 2019-02-14 14:50:56 -0800 | [diff] [blame] | 164 | static void nvme_do_delete_ctrl(struct nvme_ctrl *ctrl) |
Christoph Hellwig | c5017e8 | 2017-10-29 10:44:29 +0200 | [diff] [blame] | 165 | { |
Max Gurtovoy | 77d0612 | 2018-03-11 17:46:06 +0200 | [diff] [blame] | 166 | dev_info(ctrl->device, |
| 167 | "Removing ctrl: NQN \"%s\"\n", ctrl->opts->subsysnqn); |
| 168 | |
Sagi Grimberg | 4054637 | 2017-10-29 14:21:02 +0200 | [diff] [blame] | 169 | flush_work(&ctrl->reset_work); |
Christoph Hellwig | 6cd53d1 | 2017-10-29 10:44:31 +0200 | [diff] [blame] | 170 | nvme_stop_ctrl(ctrl); |
| 171 | nvme_remove_namespaces(ctrl); |
Christoph Hellwig | c5017e8 | 2017-10-29 10:44:29 +0200 | [diff] [blame] | 172 | ctrl->ops->delete_ctrl(ctrl); |
Christoph Hellwig | 6cd53d1 | 2017-10-29 10:44:31 +0200 | [diff] [blame] | 173 | nvme_uninit_ctrl(ctrl); |
Christoph Hellwig | c5017e8 | 2017-10-29 10:44:29 +0200 | [diff] [blame] | 174 | } |
| 175 | |
Bart Van Assche | a686ed7 | 2019-02-14 14:50:56 -0800 | [diff] [blame] | 176 | static void nvme_delete_ctrl_work(struct work_struct *work) |
| 177 | { |
| 178 | struct nvme_ctrl *ctrl = |
| 179 | container_of(work, struct nvme_ctrl, delete_work); |
| 180 | |
| 181 | nvme_do_delete_ctrl(ctrl); |
| 182 | } |
| 183 | |
Christoph Hellwig | c5017e8 | 2017-10-29 10:44:29 +0200 | [diff] [blame] | 184 | int nvme_delete_ctrl(struct nvme_ctrl *ctrl) |
| 185 | { |
| 186 | if (!nvme_change_ctrl_state(ctrl, NVME_CTRL_DELETING)) |
| 187 | return -EBUSY; |
Roy Shterman | b227c59 | 2018-01-14 12:39:02 +0200 | [diff] [blame] | 188 | if (!queue_work(nvme_delete_wq, &ctrl->delete_work)) |
Christoph Hellwig | c5017e8 | 2017-10-29 10:44:29 +0200 | [diff] [blame] | 189 | return -EBUSY; |
| 190 | return 0; |
| 191 | } |
| 192 | EXPORT_SYMBOL_GPL(nvme_delete_ctrl); |
| 193 | |
Israel Rukshin | 6721c18 | 2020-03-24 17:29:39 +0200 | [diff] [blame] | 194 | static void nvme_delete_ctrl_sync(struct nvme_ctrl *ctrl) |
Christoph Hellwig | c5017e8 | 2017-10-29 10:44:29 +0200 | [diff] [blame] | 195 | { |
Christoph Hellwig | c5017e8 | 2017-10-29 10:44:29 +0200 | [diff] [blame] | 196 | /* |
Yufen Yu | 01fc08f | 2019-03-13 18:54:58 +0100 | [diff] [blame] | 197 | * Keep a reference until nvme_do_delete_ctrl() complete, |
| 198 | * since ->delete_ctrl can free the controller. |
Christoph Hellwig | c5017e8 | 2017-10-29 10:44:29 +0200 | [diff] [blame] | 199 | */ |
| 200 | nvme_get_ctrl(ctrl); |
Israel Rukshin | 6721c18 | 2020-03-24 17:29:39 +0200 | [diff] [blame] | 201 | if (nvme_change_ctrl_state(ctrl, NVME_CTRL_DELETING)) |
Bart Van Assche | b9c7758 | 2019-02-14 14:50:57 -0800 | [diff] [blame] | 202 | nvme_do_delete_ctrl(ctrl); |
Christoph Hellwig | c5017e8 | 2017-10-29 10:44:29 +0200 | [diff] [blame] | 203 | nvme_put_ctrl(ctrl); |
Christoph Hellwig | c5017e8 | 2017-10-29 10:44:29 +0200 | [diff] [blame] | 204 | } |
Christoph Hellwig | c5017e8 | 2017-10-29 10:44:29 +0200 | [diff] [blame] | 205 | |
Sagi Grimberg | 2f9c173 | 2019-08-29 12:53:15 -0700 | [diff] [blame] | 206 | static blk_status_t nvme_error_status(u16 status) |
Christoph Hellwig | 27fa9bc | 2017-04-20 16:02:57 +0200 | [diff] [blame] | 207 | { |
Sagi Grimberg | 2f9c173 | 2019-08-29 12:53:15 -0700 | [diff] [blame] | 208 | switch (status & 0x7ff) { |
Christoph Hellwig | 27fa9bc | 2017-04-20 16:02:57 +0200 | [diff] [blame] | 209 | case NVME_SC_SUCCESS: |
Christoph Hellwig | 2a842ac | 2017-06-03 09:38:04 +0200 | [diff] [blame] | 210 | return BLK_STS_OK; |
Christoph Hellwig | 27fa9bc | 2017-04-20 16:02:57 +0200 | [diff] [blame] | 211 | case NVME_SC_CAP_EXCEEDED: |
Christoph Hellwig | 2a842ac | 2017-06-03 09:38:04 +0200 | [diff] [blame] | 212 | return BLK_STS_NOSPC; |
Keith Busch | e96fef2 | 2018-01-09 12:04:14 -0700 | [diff] [blame] | 213 | case NVME_SC_LBA_RANGE: |
Keith Busch | 35038bf | 2019-12-06 04:50:44 +0900 | [diff] [blame] | 214 | case NVME_SC_CMD_INTERRUPTED: |
| 215 | case NVME_SC_NS_NOT_READY: |
Keith Busch | e96fef2 | 2018-01-09 12:04:14 -0700 | [diff] [blame] | 216 | return BLK_STS_TARGET; |
| 217 | case NVME_SC_BAD_ATTRIBUTES: |
Junxiong Guan | e02ab02 | 2017-04-21 12:59:07 +0200 | [diff] [blame] | 218 | case NVME_SC_ONCS_NOT_SUPPORTED: |
Keith Busch | e96fef2 | 2018-01-09 12:04:14 -0700 | [diff] [blame] | 219 | case NVME_SC_INVALID_OPCODE: |
| 220 | case NVME_SC_INVALID_FIELD: |
| 221 | case NVME_SC_INVALID_NS: |
Christoph Hellwig | 2a842ac | 2017-06-03 09:38:04 +0200 | [diff] [blame] | 222 | return BLK_STS_NOTSUPP; |
Junxiong Guan | e02ab02 | 2017-04-21 12:59:07 +0200 | [diff] [blame] | 223 | case NVME_SC_WRITE_FAULT: |
| 224 | case NVME_SC_READ_ERROR: |
| 225 | case NVME_SC_UNWRITTEN_BLOCK: |
Christoph Hellwig | a751da3 | 2017-08-22 10:17:03 +0200 | [diff] [blame] | 226 | case NVME_SC_ACCESS_DENIED: |
| 227 | case NVME_SC_READ_ONLY: |
Keith Busch | e96fef2 | 2018-01-09 12:04:14 -0700 | [diff] [blame] | 228 | case NVME_SC_COMPARE_FAILED: |
Christoph Hellwig | 2a842ac | 2017-06-03 09:38:04 +0200 | [diff] [blame] | 229 | return BLK_STS_MEDIUM; |
Christoph Hellwig | a751da3 | 2017-08-22 10:17:03 +0200 | [diff] [blame] | 230 | case NVME_SC_GUARD_CHECK: |
| 231 | case NVME_SC_APPTAG_CHECK: |
| 232 | case NVME_SC_REFTAG_CHECK: |
| 233 | case NVME_SC_INVALID_PI: |
| 234 | return BLK_STS_PROTECTION; |
| 235 | case NVME_SC_RESERVATION_CONFLICT: |
| 236 | return BLK_STS_NEXUS; |
Sagi Grimberg | 1c0d12c | 2019-08-02 18:04:12 -0700 | [diff] [blame] | 237 | case NVME_SC_HOST_PATH_ERROR: |
| 238 | return BLK_STS_TRANSPORT; |
Christoph Hellwig | 2a842ac | 2017-06-03 09:38:04 +0200 | [diff] [blame] | 239 | default: |
| 240 | return BLK_STS_IOERR; |
Christoph Hellwig | 27fa9bc | 2017-04-20 16:02:57 +0200 | [diff] [blame] | 241 | } |
| 242 | } |
Christoph Hellwig | 27fa9bc | 2017-04-20 16:02:57 +0200 | [diff] [blame] | 243 | |
Christoph Hellwig | f6324b1 | 2017-04-05 19:18:09 +0200 | [diff] [blame] | 244 | static inline bool nvme_req_needs_retry(struct request *req) |
Christoph Hellwig | 77f02a7 | 2017-03-30 13:41:32 +0200 | [diff] [blame] | 245 | { |
Christoph Hellwig | f6324b1 | 2017-04-05 19:18:09 +0200 | [diff] [blame] | 246 | if (blk_noretry_request(req)) |
| 247 | return false; |
Christoph Hellwig | 27fa9bc | 2017-04-20 16:02:57 +0200 | [diff] [blame] | 248 | if (nvme_req(req)->status & NVME_SC_DNR) |
Christoph Hellwig | f6324b1 | 2017-04-05 19:18:09 +0200 | [diff] [blame] | 249 | return false; |
Christoph Hellwig | 44e44b2 | 2017-04-05 19:18:11 +0200 | [diff] [blame] | 250 | if (nvme_req(req)->retries >= nvme_max_retries) |
Christoph Hellwig | f6324b1 | 2017-04-05 19:18:09 +0200 | [diff] [blame] | 251 | return false; |
| 252 | return true; |
Christoph Hellwig | 77f02a7 | 2017-03-30 13:41:32 +0200 | [diff] [blame] | 253 | } |
| 254 | |
Keith Busch | 49cd84b | 2018-11-27 09:40:57 -0700 | [diff] [blame] | 255 | static void nvme_retry_req(struct request *req) |
| 256 | { |
| 257 | struct nvme_ns *ns = req->q->queuedata; |
| 258 | unsigned long delay = 0; |
| 259 | u16 crd; |
| 260 | |
| 261 | /* The mask and shift result must be <= 3 */ |
| 262 | crd = (nvme_req(req)->status & NVME_SC_CRD) >> 11; |
| 263 | if (ns && crd) |
| 264 | delay = ns->ctrl->crdt[crd - 1] * 100; |
| 265 | |
| 266 | nvme_req(req)->retries++; |
| 267 | blk_mq_requeue_request(req, false); |
| 268 | blk_mq_delay_kick_requeue_list(req->q, delay); |
| 269 | } |
| 270 | |
Christoph Hellwig | 77f02a7 | 2017-03-30 13:41:32 +0200 | [diff] [blame] | 271 | void nvme_complete_rq(struct request *req) |
| 272 | { |
Sagi Grimberg | 2f9c173 | 2019-08-29 12:53:15 -0700 | [diff] [blame] | 273 | blk_status_t status = nvme_error_status(nvme_req(req)->status); |
Keith Busch | 908e456 | 2018-01-09 12:04:15 -0700 | [diff] [blame] | 274 | |
Johannes Thumshirn | ca5554a | 2018-01-26 11:21:38 +0100 | [diff] [blame] | 275 | trace_nvme_complete_rq(req); |
| 276 | |
Max Gurtovoy | 16686f3 | 2019-10-13 19:57:36 +0300 | [diff] [blame] | 277 | nvme_cleanup_cmd(req); |
| 278 | |
Sagi Grimberg | 6e3ca03e | 2018-11-02 10:28:15 -0700 | [diff] [blame] | 279 | if (nvme_req(req)->ctrl->kas) |
| 280 | nvme_req(req)->ctrl->comp_seen = true; |
| 281 | |
Keith Busch | 908e456 | 2018-01-09 12:04:15 -0700 | [diff] [blame] | 282 | if (unlikely(status != BLK_STS_OK && nvme_req_needs_retry(req))) { |
John Meneghini | 764e933 | 2020-02-20 10:05:38 +0900 | [diff] [blame] | 283 | if ((req->cmd_flags & REQ_NVME_MPATH) && nvme_failover_req(req)) |
Christoph Hellwig | 32acab3 | 2017-11-02 12:59:30 +0100 | [diff] [blame] | 284 | return; |
Christoph Hellwig | 32acab3 | 2017-11-02 12:59:30 +0100 | [diff] [blame] | 285 | |
| 286 | if (!blk_queue_dying(req->q)) { |
Keith Busch | 49cd84b | 2018-11-27 09:40:57 -0700 | [diff] [blame] | 287 | nvme_retry_req(req); |
Christoph Hellwig | 32acab3 | 2017-11-02 12:59:30 +0100 | [diff] [blame] | 288 | return; |
| 289 | } |
Keith Busch | 240e6ee | 2020-06-29 12:06:41 -0700 | [diff] [blame] | 290 | } else if (IS_ENABLED(CONFIG_BLK_DEV_ZONED) && |
| 291 | req_op(req) == REQ_OP_ZONE_APPEND) { |
| 292 | req->__sector = nvme_lba_to_sect(req->q->queuedata, |
| 293 | le64_to_cpu(nvme_req(req)->result.u64)); |
Christoph Hellwig | 77f02a7 | 2017-03-30 13:41:32 +0200 | [diff] [blame] | 294 | } |
Hannes Reinecke | 35fe0d1 | 2019-07-24 15:47:55 +0200 | [diff] [blame] | 295 | |
| 296 | nvme_trace_bio_complete(req, status); |
Keith Busch | 908e456 | 2018-01-09 12:04:15 -0700 | [diff] [blame] | 297 | blk_mq_end_request(req, status); |
Christoph Hellwig | 77f02a7 | 2017-03-30 13:41:32 +0200 | [diff] [blame] | 298 | } |
| 299 | EXPORT_SYMBOL_GPL(nvme_complete_rq); |
| 300 | |
Jens Axboe | 7baa857 | 2018-11-08 10:24:07 -0700 | [diff] [blame] | 301 | bool nvme_cancel_request(struct request *req, void *data, bool reserved) |
Ming Lin | c55a2fd | 2016-05-18 14:05:02 -0700 | [diff] [blame] | 302 | { |
Ming Lin | c55a2fd | 2016-05-18 14:05:02 -0700 | [diff] [blame] | 303 | dev_dbg_ratelimited(((struct nvme_ctrl *) data)->device, |
| 304 | "Cancelling I/O %d", req->tag); |
| 305 | |
Ming Lei | 78ca407 | 2019-07-24 11:48:41 +0800 | [diff] [blame] | 306 | /* don't abort one completed request */ |
| 307 | if (blk_mq_request_completed(req)) |
| 308 | return true; |
| 309 | |
Max Gurtovoy | 2dc3947 | 2019-10-13 19:57:35 +0300 | [diff] [blame] | 310 | nvme_req(req)->status = NVME_SC_HOST_ABORTED_CMD; |
Christoph Hellwig | 15f73f5 | 2020-06-11 08:44:47 +0200 | [diff] [blame] | 311 | blk_mq_complete_request(req); |
Jens Axboe | 7baa857 | 2018-11-08 10:24:07 -0700 | [diff] [blame] | 312 | return true; |
Ming Lin | c55a2fd | 2016-05-18 14:05:02 -0700 | [diff] [blame] | 313 | } |
| 314 | EXPORT_SYMBOL_GPL(nvme_cancel_request); |
| 315 | |
Christoph Hellwig | bb8d261 | 2016-04-26 13:51:57 +0200 | [diff] [blame] | 316 | bool nvme_change_ctrl_state(struct nvme_ctrl *ctrl, |
| 317 | enum nvme_ctrl_state new_state) |
| 318 | { |
Gabriel Krisman Bertazi | f6b6a28 | 2016-07-29 16:15:18 -0300 | [diff] [blame] | 319 | enum nvme_ctrl_state old_state; |
Christoph Hellwig | 0a72bbb | 2017-08-22 11:42:24 +0200 | [diff] [blame] | 320 | unsigned long flags; |
Christoph Hellwig | bb8d261 | 2016-04-26 13:51:57 +0200 | [diff] [blame] | 321 | bool changed = false; |
| 322 | |
Christoph Hellwig | 0a72bbb | 2017-08-22 11:42:24 +0200 | [diff] [blame] | 323 | spin_lock_irqsave(&ctrl->lock, flags); |
Gabriel Krisman Bertazi | f6b6a28 | 2016-07-29 16:15:18 -0300 | [diff] [blame] | 324 | |
| 325 | old_state = ctrl->state; |
Christoph Hellwig | bb8d261 | 2016-04-26 13:51:57 +0200 | [diff] [blame] | 326 | switch (new_state) { |
| 327 | case NVME_CTRL_LIVE: |
| 328 | switch (old_state) { |
Christoph Hellwig | 7d2e800 | 2016-06-13 16:45:22 +0200 | [diff] [blame] | 329 | case NVME_CTRL_NEW: |
Christoph Hellwig | bb8d261 | 2016-04-26 13:51:57 +0200 | [diff] [blame] | 330 | case NVME_CTRL_RESETTING: |
Max Gurtovoy | ad6a0a5 | 2018-01-31 18:31:24 +0200 | [diff] [blame] | 331 | case NVME_CTRL_CONNECTING: |
Christoph Hellwig | bb8d261 | 2016-04-26 13:51:57 +0200 | [diff] [blame] | 332 | changed = true; |
| 333 | /* FALLTHRU */ |
| 334 | default: |
| 335 | break; |
| 336 | } |
| 337 | break; |
| 338 | case NVME_CTRL_RESETTING: |
| 339 | switch (old_state) { |
| 340 | case NVME_CTRL_NEW: |
| 341 | case NVME_CTRL_LIVE: |
Christoph Hellwig | def61ec | 2016-07-06 21:55:49 +0900 | [diff] [blame] | 342 | changed = true; |
| 343 | /* FALLTHRU */ |
| 344 | default: |
| 345 | break; |
| 346 | } |
| 347 | break; |
Max Gurtovoy | ad6a0a5 | 2018-01-31 18:31:24 +0200 | [diff] [blame] | 348 | case NVME_CTRL_CONNECTING: |
Christoph Hellwig | def61ec | 2016-07-06 21:55:49 +0900 | [diff] [blame] | 349 | switch (old_state) { |
Max Gurtovoy | b754a32 | 2018-01-31 18:31:25 +0200 | [diff] [blame] | 350 | case NVME_CTRL_NEW: |
James Smart | 3cec7f9 | 2017-10-25 16:43:13 -0700 | [diff] [blame] | 351 | case NVME_CTRL_RESETTING: |
Christoph Hellwig | bb8d261 | 2016-04-26 13:51:57 +0200 | [diff] [blame] | 352 | changed = true; |
| 353 | /* FALLTHRU */ |
| 354 | default: |
| 355 | break; |
| 356 | } |
| 357 | break; |
| 358 | case NVME_CTRL_DELETING: |
| 359 | switch (old_state) { |
| 360 | case NVME_CTRL_LIVE: |
| 361 | case NVME_CTRL_RESETTING: |
Max Gurtovoy | ad6a0a5 | 2018-01-31 18:31:24 +0200 | [diff] [blame] | 362 | case NVME_CTRL_CONNECTING: |
Christoph Hellwig | bb8d261 | 2016-04-26 13:51:57 +0200 | [diff] [blame] | 363 | changed = true; |
| 364 | /* FALLTHRU */ |
| 365 | default: |
| 366 | break; |
| 367 | } |
| 368 | break; |
Sagi Grimberg | ecca390e | 2020-07-22 16:32:19 -0700 | [diff] [blame] | 369 | case NVME_CTRL_DELETING_NOIO: |
| 370 | switch (old_state) { |
| 371 | case NVME_CTRL_DELETING: |
| 372 | case NVME_CTRL_DEAD: |
| 373 | changed = true; |
| 374 | /* FALLTHRU */ |
| 375 | default: |
| 376 | break; |
| 377 | } |
| 378 | break; |
Keith Busch | 0ff9d4e | 2016-05-12 08:37:14 -0600 | [diff] [blame] | 379 | case NVME_CTRL_DEAD: |
| 380 | switch (old_state) { |
| 381 | case NVME_CTRL_DELETING: |
| 382 | changed = true; |
| 383 | /* FALLTHRU */ |
| 384 | default: |
| 385 | break; |
| 386 | } |
| 387 | break; |
Christoph Hellwig | bb8d261 | 2016-04-26 13:51:57 +0200 | [diff] [blame] | 388 | default: |
| 389 | break; |
| 390 | } |
Christoph Hellwig | bb8d261 | 2016-04-26 13:51:57 +0200 | [diff] [blame] | 391 | |
Keith Busch | c1ac9a4b | 2019-09-04 10:06:11 -0600 | [diff] [blame] | 392 | if (changed) { |
Christoph Hellwig | bb8d261 | 2016-04-26 13:51:57 +0200 | [diff] [blame] | 393 | ctrl->state = new_state; |
Keith Busch | c1ac9a4b | 2019-09-04 10:06:11 -0600 | [diff] [blame] | 394 | wake_up_all(&ctrl->state_wq); |
| 395 | } |
Christoph Hellwig | bb8d261 | 2016-04-26 13:51:57 +0200 | [diff] [blame] | 396 | |
Christoph Hellwig | 0a72bbb | 2017-08-22 11:42:24 +0200 | [diff] [blame] | 397 | spin_unlock_irqrestore(&ctrl->lock, flags); |
Christoph Hellwig | 32acab3 | 2017-11-02 12:59:30 +0100 | [diff] [blame] | 398 | if (changed && ctrl->state == NVME_CTRL_LIVE) |
| 399 | nvme_kick_requeue_lists(ctrl); |
Christoph Hellwig | bb8d261 | 2016-04-26 13:51:57 +0200 | [diff] [blame] | 400 | return changed; |
| 401 | } |
| 402 | EXPORT_SYMBOL_GPL(nvme_change_ctrl_state); |
| 403 | |
Keith Busch | c1ac9a4b | 2019-09-04 10:06:11 -0600 | [diff] [blame] | 404 | /* |
| 405 | * Returns true for sink states that can't ever transition back to live. |
| 406 | */ |
| 407 | static bool nvme_state_terminal(struct nvme_ctrl *ctrl) |
| 408 | { |
| 409 | switch (ctrl->state) { |
| 410 | case NVME_CTRL_NEW: |
| 411 | case NVME_CTRL_LIVE: |
| 412 | case NVME_CTRL_RESETTING: |
| 413 | case NVME_CTRL_CONNECTING: |
| 414 | return false; |
| 415 | case NVME_CTRL_DELETING: |
Sagi Grimberg | ecca390e | 2020-07-22 16:32:19 -0700 | [diff] [blame] | 416 | case NVME_CTRL_DELETING_NOIO: |
Keith Busch | c1ac9a4b | 2019-09-04 10:06:11 -0600 | [diff] [blame] | 417 | case NVME_CTRL_DEAD: |
| 418 | return true; |
| 419 | default: |
| 420 | WARN_ONCE(1, "Unhandled ctrl state:%d", ctrl->state); |
| 421 | return true; |
| 422 | } |
| 423 | } |
| 424 | |
| 425 | /* |
| 426 | * Waits for the controller state to be resetting, or returns false if it is |
| 427 | * not possible to ever transition to that state. |
| 428 | */ |
| 429 | bool nvme_wait_reset(struct nvme_ctrl *ctrl) |
| 430 | { |
| 431 | wait_event(ctrl->state_wq, |
| 432 | nvme_change_ctrl_state(ctrl, NVME_CTRL_RESETTING) || |
| 433 | nvme_state_terminal(ctrl)); |
| 434 | return ctrl->state == NVME_CTRL_RESETTING; |
| 435 | } |
| 436 | EXPORT_SYMBOL_GPL(nvme_wait_reset); |
| 437 | |
Christoph Hellwig | ed754e5 | 2017-11-09 13:50:43 +0100 | [diff] [blame] | 438 | static void nvme_free_ns_head(struct kref *ref) |
| 439 | { |
| 440 | struct nvme_ns_head *head = |
| 441 | container_of(ref, struct nvme_ns_head, ref); |
| 442 | |
Christoph Hellwig | 32acab3 | 2017-11-02 12:59:30 +0100 | [diff] [blame] | 443 | nvme_mpath_remove_disk(head); |
Christoph Hellwig | ed754e5 | 2017-11-09 13:50:43 +0100 | [diff] [blame] | 444 | ida_simple_remove(&head->subsys->ns_ida, head->instance); |
Paul E. McKenney | f5ad399 | 2019-02-13 13:54:37 -0800 | [diff] [blame] | 445 | cleanup_srcu_struct(&head->srcu); |
Jianchao Wang | 12d9f07 | 2018-05-04 16:01:57 +0800 | [diff] [blame] | 446 | nvme_put_subsystem(head->subsys); |
Christoph Hellwig | ed754e5 | 2017-11-09 13:50:43 +0100 | [diff] [blame] | 447 | kfree(head); |
| 448 | } |
| 449 | |
| 450 | static void nvme_put_ns_head(struct nvme_ns_head *head) |
| 451 | { |
| 452 | kref_put(&head->ref, nvme_free_ns_head); |
| 453 | } |
| 454 | |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 455 | static void nvme_free_ns(struct kref *kref) |
| 456 | { |
| 457 | struct nvme_ns *ns = container_of(kref, struct nvme_ns, kref); |
| 458 | |
Matias Bjørling | b0b4e09 | 2016-09-16 14:25:07 +0200 | [diff] [blame] | 459 | if (ns->ndev) |
| 460 | nvme_nvm_unregister(ns); |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 461 | |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 462 | put_disk(ns->disk); |
Christoph Hellwig | ed754e5 | 2017-11-09 13:50:43 +0100 | [diff] [blame] | 463 | nvme_put_ns_head(ns->head); |
Keith Busch | 075790e | 2016-02-24 09:15:53 -0700 | [diff] [blame] | 464 | nvme_put_ctrl(ns->ctrl); |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 465 | kfree(ns); |
| 466 | } |
| 467 | |
Logan Gunthorpe | 24493b8 | 2020-07-24 11:25:16 -0600 | [diff] [blame] | 468 | void nvme_put_ns(struct nvme_ns *ns) |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 469 | { |
| 470 | kref_put(&ns->kref, nvme_free_ns); |
| 471 | } |
Logan Gunthorpe | 24493b8 | 2020-07-24 11:25:16 -0600 | [diff] [blame] | 472 | EXPORT_SYMBOL_NS_GPL(nvme_put_ns, NVME_TARGET_PASSTHRU); |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 473 | |
James Smart | bb06ec31 | 2018-04-12 09:16:15 -0600 | [diff] [blame] | 474 | static inline void nvme_clear_nvme_request(struct request *req) |
| 475 | { |
| 476 | if (!(req->rq_flags & RQF_DONTPREP)) { |
| 477 | nvme_req(req)->retries = 0; |
| 478 | nvme_req(req)->flags = 0; |
| 479 | req->rq_flags |= RQF_DONTPREP; |
| 480 | } |
| 481 | } |
| 482 | |
Christoph Hellwig | 4160982 | 2015-11-20 09:00:02 +0100 | [diff] [blame] | 483 | struct request *nvme_alloc_request(struct request_queue *q, |
Bart Van Assche | 9a95e4e | 2017-11-09 10:49:59 -0800 | [diff] [blame] | 484 | struct nvme_command *cmd, blk_mq_req_flags_t flags, int qid) |
Christoph Hellwig | 21d3471 | 2015-11-26 09:08:36 +0100 | [diff] [blame] | 485 | { |
Christoph Hellwig | aebf526 | 2017-01-31 16:57:31 +0100 | [diff] [blame] | 486 | unsigned op = nvme_is_write(cmd) ? REQ_OP_DRV_OUT : REQ_OP_DRV_IN; |
Christoph Hellwig | 21d3471 | 2015-11-26 09:08:36 +0100 | [diff] [blame] | 487 | struct request *req; |
Christoph Hellwig | 21d3471 | 2015-11-26 09:08:36 +0100 | [diff] [blame] | 488 | |
Christoph Hellwig | eb71f43 | 2016-06-13 16:45:23 +0200 | [diff] [blame] | 489 | if (qid == NVME_QID_ANY) { |
Christoph Hellwig | aebf526 | 2017-01-31 16:57:31 +0100 | [diff] [blame] | 490 | req = blk_mq_alloc_request(q, op, flags); |
Christoph Hellwig | eb71f43 | 2016-06-13 16:45:23 +0200 | [diff] [blame] | 491 | } else { |
Christoph Hellwig | aebf526 | 2017-01-31 16:57:31 +0100 | [diff] [blame] | 492 | req = blk_mq_alloc_request_hctx(q, op, flags, |
Christoph Hellwig | eb71f43 | 2016-06-13 16:45:23 +0200 | [diff] [blame] | 493 | qid ? qid - 1 : 0); |
| 494 | } |
Christoph Hellwig | 21d3471 | 2015-11-26 09:08:36 +0100 | [diff] [blame] | 495 | if (IS_ERR(req)) |
Christoph Hellwig | 4160982 | 2015-11-20 09:00:02 +0100 | [diff] [blame] | 496 | return req; |
Christoph Hellwig | 21d3471 | 2015-11-26 09:08:36 +0100 | [diff] [blame] | 497 | |
Christoph Hellwig | 21d3471 | 2015-11-26 09:08:36 +0100 | [diff] [blame] | 498 | req->cmd_flags |= REQ_FAILFAST_DRIVER; |
James Smart | bb06ec31 | 2018-04-12 09:16:15 -0600 | [diff] [blame] | 499 | nvme_clear_nvme_request(req); |
Christoph Hellwig | d49187e | 2016-11-10 07:32:33 -0800 | [diff] [blame] | 500 | nvme_req(req)->cmd = cmd; |
Christoph Hellwig | 21d3471 | 2015-11-26 09:08:36 +0100 | [diff] [blame] | 501 | |
Christoph Hellwig | 4160982 | 2015-11-20 09:00:02 +0100 | [diff] [blame] | 502 | return req; |
| 503 | } |
Ming Lin | 576d55d | 2016-02-10 10:03:32 -0800 | [diff] [blame] | 504 | EXPORT_SYMBOL_GPL(nvme_alloc_request); |
Christoph Hellwig | 4160982 | 2015-11-20 09:00:02 +0100 | [diff] [blame] | 505 | |
Jens Axboe | f5d1184 | 2017-06-27 12:03:06 -0600 | [diff] [blame] | 506 | static int nvme_toggle_streams(struct nvme_ctrl *ctrl, bool enable) |
| 507 | { |
| 508 | struct nvme_command c; |
| 509 | |
| 510 | memset(&c, 0, sizeof(c)); |
| 511 | |
| 512 | c.directive.opcode = nvme_admin_directive_send; |
Arnav Dawn | 62346ea | 2017-07-12 16:11:53 +0530 | [diff] [blame] | 513 | c.directive.nsid = cpu_to_le32(NVME_NSID_ALL); |
Jens Axboe | f5d1184 | 2017-06-27 12:03:06 -0600 | [diff] [blame] | 514 | c.directive.doper = NVME_DIR_SND_ID_OP_ENABLE; |
| 515 | c.directive.dtype = NVME_DIR_IDENTIFY; |
| 516 | c.directive.tdtype = NVME_DIR_STREAMS; |
| 517 | c.directive.endir = enable ? NVME_DIR_ENDIR : 0; |
| 518 | |
| 519 | return nvme_submit_sync_cmd(ctrl->admin_q, &c, NULL, 0); |
| 520 | } |
| 521 | |
| 522 | static int nvme_disable_streams(struct nvme_ctrl *ctrl) |
| 523 | { |
| 524 | return nvme_toggle_streams(ctrl, false); |
| 525 | } |
| 526 | |
| 527 | static int nvme_enable_streams(struct nvme_ctrl *ctrl) |
| 528 | { |
| 529 | return nvme_toggle_streams(ctrl, true); |
| 530 | } |
| 531 | |
| 532 | static int nvme_get_stream_params(struct nvme_ctrl *ctrl, |
| 533 | struct streams_directive_params *s, u32 nsid) |
| 534 | { |
| 535 | struct nvme_command c; |
| 536 | |
| 537 | memset(&c, 0, sizeof(c)); |
| 538 | memset(s, 0, sizeof(*s)); |
| 539 | |
| 540 | c.directive.opcode = nvme_admin_directive_recv; |
| 541 | c.directive.nsid = cpu_to_le32(nsid); |
Keith Busch | 71fb90e | 2020-04-03 09:24:01 -0700 | [diff] [blame] | 542 | c.directive.numd = cpu_to_le32(nvme_bytes_to_numd(sizeof(*s))); |
Jens Axboe | f5d1184 | 2017-06-27 12:03:06 -0600 | [diff] [blame] | 543 | c.directive.doper = NVME_DIR_RCV_ST_OP_PARAM; |
| 544 | c.directive.dtype = NVME_DIR_STREAMS; |
| 545 | |
| 546 | return nvme_submit_sync_cmd(ctrl->admin_q, &c, s, sizeof(*s)); |
| 547 | } |
| 548 | |
| 549 | static int nvme_configure_directives(struct nvme_ctrl *ctrl) |
| 550 | { |
| 551 | struct streams_directive_params s; |
| 552 | int ret; |
| 553 | |
| 554 | if (!(ctrl->oacs & NVME_CTRL_OACS_DIRECTIVES)) |
| 555 | return 0; |
| 556 | if (!streams) |
| 557 | return 0; |
| 558 | |
| 559 | ret = nvme_enable_streams(ctrl); |
| 560 | if (ret) |
| 561 | return ret; |
| 562 | |
Arnav Dawn | 62346ea | 2017-07-12 16:11:53 +0530 | [diff] [blame] | 563 | ret = nvme_get_stream_params(ctrl, &s, NVME_NSID_ALL); |
Jens Axboe | f5d1184 | 2017-06-27 12:03:06 -0600 | [diff] [blame] | 564 | if (ret) |
Wu Bo | 84e4c20 | 2020-05-13 16:18:13 +0800 | [diff] [blame] | 565 | goto out_disable_stream; |
Jens Axboe | f5d1184 | 2017-06-27 12:03:06 -0600 | [diff] [blame] | 566 | |
| 567 | ctrl->nssa = le16_to_cpu(s.nssa); |
| 568 | if (ctrl->nssa < BLK_MAX_WRITE_HINTS - 1) { |
| 569 | dev_info(ctrl->device, "too few streams (%u) available\n", |
| 570 | ctrl->nssa); |
Wu Bo | 84e4c20 | 2020-05-13 16:18:13 +0800 | [diff] [blame] | 571 | goto out_disable_stream; |
Jens Axboe | f5d1184 | 2017-06-27 12:03:06 -0600 | [diff] [blame] | 572 | } |
| 573 | |
Chaitanya Kulkarni | a87835e | 2020-06-01 19:41:11 -0700 | [diff] [blame] | 574 | ctrl->nr_streams = min_t(u16, ctrl->nssa, BLK_MAX_WRITE_HINTS - 1); |
Jens Axboe | f5d1184 | 2017-06-27 12:03:06 -0600 | [diff] [blame] | 575 | dev_info(ctrl->device, "Using %u streams\n", ctrl->nr_streams); |
| 576 | return 0; |
Wu Bo | 84e4c20 | 2020-05-13 16:18:13 +0800 | [diff] [blame] | 577 | |
| 578 | out_disable_stream: |
| 579 | nvme_disable_streams(ctrl); |
| 580 | return ret; |
Jens Axboe | f5d1184 | 2017-06-27 12:03:06 -0600 | [diff] [blame] | 581 | } |
| 582 | |
| 583 | /* |
| 584 | * Check if 'req' has a write hint associated with it. If it does, assign |
| 585 | * a valid namespace stream to the write. |
| 586 | */ |
| 587 | static void nvme_assign_write_stream(struct nvme_ctrl *ctrl, |
| 588 | struct request *req, u16 *control, |
| 589 | u32 *dsmgmt) |
| 590 | { |
| 591 | enum rw_hint streamid = req->write_hint; |
| 592 | |
| 593 | if (streamid == WRITE_LIFE_NOT_SET || streamid == WRITE_LIFE_NONE) |
| 594 | streamid = 0; |
| 595 | else { |
| 596 | streamid--; |
| 597 | if (WARN_ON_ONCE(streamid > ctrl->nr_streams)) |
| 598 | return; |
| 599 | |
| 600 | *control |= NVME_RW_DTYPE_STREAMS; |
| 601 | *dsmgmt |= streamid << 16; |
| 602 | } |
| 603 | |
| 604 | if (streamid < ARRAY_SIZE(req->q->write_hints)) |
| 605 | req->q->write_hints[streamid] += blk_rq_bytes(req) >> 9; |
| 606 | } |
| 607 | |
Logan Gunthorpe | 2bf5d3b | 2020-07-24 11:25:12 -0600 | [diff] [blame] | 608 | static void nvme_setup_passthrough(struct request *req, |
| 609 | struct nvme_command *cmd) |
| 610 | { |
| 611 | memcpy(cmd, nvme_req(req)->cmd, sizeof(*cmd)); |
| 612 | /* passthru commands should let the driver set the SGL flags */ |
| 613 | cmd->common.flags &= ~NVME_CMD_SGL_ALL; |
| 614 | } |
| 615 | |
Ming Lin | 8093f7c | 2016-04-12 13:10:14 -0600 | [diff] [blame] | 616 | static inline void nvme_setup_flush(struct nvme_ns *ns, |
| 617 | struct nvme_command *cmnd) |
| 618 | { |
Ming Lin | 8093f7c | 2016-04-12 13:10:14 -0600 | [diff] [blame] | 619 | cmnd->common.opcode = nvme_cmd_flush; |
Christoph Hellwig | ed754e5 | 2017-11-09 13:50:43 +0100 | [diff] [blame] | 620 | cmnd->common.nsid = cpu_to_le32(ns->head->ns_id); |
Ming Lin | 8093f7c | 2016-04-12 13:10:14 -0600 | [diff] [blame] | 621 | } |
| 622 | |
Christoph Hellwig | fc17b65 | 2017-06-03 09:38:05 +0200 | [diff] [blame] | 623 | static blk_status_t nvme_setup_discard(struct nvme_ns *ns, struct request *req, |
Ming Lin | 8093f7c | 2016-04-12 13:10:14 -0600 | [diff] [blame] | 624 | struct nvme_command *cmnd) |
| 625 | { |
Christoph Hellwig | b35ba01 | 2017-02-08 14:46:50 +0100 | [diff] [blame] | 626 | unsigned short segments = blk_rq_nr_discard_segments(req), n = 0; |
Ming Lin | 8093f7c | 2016-04-12 13:10:14 -0600 | [diff] [blame] | 627 | struct nvme_dsm_range *range; |
Christoph Hellwig | b35ba01 | 2017-02-08 14:46:50 +0100 | [diff] [blame] | 628 | struct bio *bio; |
Ming Lin | 8093f7c | 2016-04-12 13:10:14 -0600 | [diff] [blame] | 629 | |
Eduard Hasenleithner | 530436c | 2019-11-12 21:55:01 +0100 | [diff] [blame] | 630 | /* |
| 631 | * Some devices do not consider the DSM 'Number of Ranges' field when |
| 632 | * determining how much data to DMA. Always allocate memory for maximum |
| 633 | * number of segments to prevent device reading beyond end of buffer. |
| 634 | */ |
| 635 | static const size_t alloc_size = sizeof(*range) * NVME_DSM_MAX_RANGES; |
| 636 | |
| 637 | range = kzalloc(alloc_size, GFP_ATOMIC | __GFP_NOWARN); |
Jens Axboe | cb5b726 | 2018-12-12 09:18:11 -0700 | [diff] [blame] | 638 | if (!range) { |
| 639 | /* |
| 640 | * If we fail allocation our range, fallback to the controller |
| 641 | * discard page. If that's also busy, it's safe to return |
| 642 | * busy, as we know we can make progress once that's freed. |
| 643 | */ |
| 644 | if (test_and_set_bit_lock(0, &ns->ctrl->discard_page_busy)) |
| 645 | return BLK_STS_RESOURCE; |
| 646 | |
| 647 | range = page_address(ns->ctrl->discard_page); |
| 648 | } |
Ming Lin | 8093f7c | 2016-04-12 13:10:14 -0600 | [diff] [blame] | 649 | |
Christoph Hellwig | b35ba01 | 2017-02-08 14:46:50 +0100 | [diff] [blame] | 650 | __rq_for_each_bio(bio, req) { |
Damien Le Moal | 314d48d | 2019-10-21 12:40:03 +0900 | [diff] [blame] | 651 | u64 slba = nvme_sect_to_lba(ns, bio->bi_iter.bi_sector); |
Christoph Hellwig | b35ba01 | 2017-02-08 14:46:50 +0100 | [diff] [blame] | 652 | u32 nlb = bio->bi_iter.bi_size >> ns->lba_shift; |
| 653 | |
Keith Busch | 8cb6af7 | 2018-01-31 17:01:58 -0700 | [diff] [blame] | 654 | if (n < segments) { |
| 655 | range[n].cattr = cpu_to_le32(0); |
| 656 | range[n].nlb = cpu_to_le32(nlb); |
| 657 | range[n].slba = cpu_to_le64(slba); |
| 658 | } |
Christoph Hellwig | b35ba01 | 2017-02-08 14:46:50 +0100 | [diff] [blame] | 659 | n++; |
| 660 | } |
| 661 | |
| 662 | if (WARN_ON_ONCE(n != segments)) { |
Jens Axboe | cb5b726 | 2018-12-12 09:18:11 -0700 | [diff] [blame] | 663 | if (virt_to_page(range) == ns->ctrl->discard_page) |
| 664 | clear_bit_unlock(0, &ns->ctrl->discard_page_busy); |
| 665 | else |
| 666 | kfree(range); |
Christoph Hellwig | fc17b65 | 2017-06-03 09:38:05 +0200 | [diff] [blame] | 667 | return BLK_STS_IOERR; |
Christoph Hellwig | b35ba01 | 2017-02-08 14:46:50 +0100 | [diff] [blame] | 668 | } |
Ming Lin | 8093f7c | 2016-04-12 13:10:14 -0600 | [diff] [blame] | 669 | |
Ming Lin | 8093f7c | 2016-04-12 13:10:14 -0600 | [diff] [blame] | 670 | cmnd->dsm.opcode = nvme_cmd_dsm; |
Christoph Hellwig | ed754e5 | 2017-11-09 13:50:43 +0100 | [diff] [blame] | 671 | cmnd->dsm.nsid = cpu_to_le32(ns->head->ns_id); |
Christoph Hellwig | f1dd03a | 2017-03-31 17:00:05 +0200 | [diff] [blame] | 672 | cmnd->dsm.nr = cpu_to_le32(segments - 1); |
Ming Lin | 8093f7c | 2016-04-12 13:10:14 -0600 | [diff] [blame] | 673 | cmnd->dsm.attributes = cpu_to_le32(NVME_DSMGMT_AD); |
| 674 | |
Christoph Hellwig | f9d03f9 | 2016-12-08 15:20:32 -0700 | [diff] [blame] | 675 | req->special_vec.bv_page = virt_to_page(range); |
| 676 | req->special_vec.bv_offset = offset_in_page(range); |
Eduard Hasenleithner | 530436c | 2019-11-12 21:55:01 +0100 | [diff] [blame] | 677 | req->special_vec.bv_len = alloc_size; |
Christoph Hellwig | f9d03f9 | 2016-12-08 15:20:32 -0700 | [diff] [blame] | 678 | req->rq_flags |= RQF_SPECIAL_PAYLOAD; |
Ming Lin | 8093f7c | 2016-04-12 13:10:14 -0600 | [diff] [blame] | 679 | |
Christoph Hellwig | fc17b65 | 2017-06-03 09:38:05 +0200 | [diff] [blame] | 680 | return BLK_STS_OK; |
Ming Lin | 8093f7c | 2016-04-12 13:10:14 -0600 | [diff] [blame] | 681 | } |
Ming Lin | 8093f7c | 2016-04-12 13:10:14 -0600 | [diff] [blame] | 682 | |
Chaitanya Kulkarni | 6e02318 | 2018-12-17 22:42:03 -0500 | [diff] [blame] | 683 | static inline blk_status_t nvme_setup_write_zeroes(struct nvme_ns *ns, |
| 684 | struct request *req, struct nvme_command *cmnd) |
| 685 | { |
| 686 | if (ns->ctrl->quirks & NVME_QUIRK_DEALLOCATE_ZEROES) |
| 687 | return nvme_setup_discard(ns, req, cmnd); |
| 688 | |
| 689 | cmnd->write_zeroes.opcode = nvme_cmd_write_zeroes; |
| 690 | cmnd->write_zeroes.nsid = cpu_to_le32(ns->head->ns_id); |
| 691 | cmnd->write_zeroes.slba = |
Damien Le Moal | 314d48d | 2019-10-21 12:40:03 +0900 | [diff] [blame] | 692 | cpu_to_le64(nvme_sect_to_lba(ns, blk_rq_pos(req))); |
Chaitanya Kulkarni | 6e02318 | 2018-12-17 22:42:03 -0500 | [diff] [blame] | 693 | cmnd->write_zeroes.length = |
| 694 | cpu_to_le16((blk_rq_bytes(req) >> ns->lba_shift) - 1); |
| 695 | cmnd->write_zeroes.control = 0; |
| 696 | return BLK_STS_OK; |
| 697 | } |
| 698 | |
Christoph Hellwig | ebe6d87 | 2017-06-12 18:36:32 +0200 | [diff] [blame] | 699 | static inline blk_status_t nvme_setup_rw(struct nvme_ns *ns, |
Keith Busch | 240e6ee | 2020-06-29 12:06:41 -0700 | [diff] [blame] | 700 | struct request *req, struct nvme_command *cmnd, |
| 701 | enum nvme_opcode op) |
Ming Lin | 8093f7c | 2016-04-12 13:10:14 -0600 | [diff] [blame] | 702 | { |
Jens Axboe | f5d1184 | 2017-06-27 12:03:06 -0600 | [diff] [blame] | 703 | struct nvme_ctrl *ctrl = ns->ctrl; |
Ming Lin | 8093f7c | 2016-04-12 13:10:14 -0600 | [diff] [blame] | 704 | u16 control = 0; |
| 705 | u32 dsmgmt = 0; |
| 706 | |
| 707 | if (req->cmd_flags & REQ_FUA) |
| 708 | control |= NVME_RW_FUA; |
| 709 | if (req->cmd_flags & (REQ_FAILFAST_DEV | REQ_RAHEAD)) |
| 710 | control |= NVME_RW_LR; |
| 711 | |
| 712 | if (req->cmd_flags & REQ_RAHEAD) |
| 713 | dsmgmt |= NVME_RW_DSM_FREQ_PREFETCH; |
| 714 | |
Keith Busch | 240e6ee | 2020-06-29 12:06:41 -0700 | [diff] [blame] | 715 | cmnd->rw.opcode = op; |
Christoph Hellwig | ed754e5 | 2017-11-09 13:50:43 +0100 | [diff] [blame] | 716 | cmnd->rw.nsid = cpu_to_le32(ns->head->ns_id); |
Damien Le Moal | 314d48d | 2019-10-21 12:40:03 +0900 | [diff] [blame] | 717 | cmnd->rw.slba = cpu_to_le64(nvme_sect_to_lba(ns, blk_rq_pos(req))); |
Ming Lin | 8093f7c | 2016-04-12 13:10:14 -0600 | [diff] [blame] | 718 | cmnd->rw.length = cpu_to_le16((blk_rq_bytes(req) >> ns->lba_shift) - 1); |
| 719 | |
Jens Axboe | f5d1184 | 2017-06-27 12:03:06 -0600 | [diff] [blame] | 720 | if (req_op(req) == REQ_OP_WRITE && ctrl->nr_streams) |
| 721 | nvme_assign_write_stream(ctrl, req, &control, &dsmgmt); |
| 722 | |
Ming Lin | 8093f7c | 2016-04-12 13:10:14 -0600 | [diff] [blame] | 723 | if (ns->ms) { |
Christoph Hellwig | 715ea9e | 2017-11-07 17:27:34 +0100 | [diff] [blame] | 724 | /* |
| 725 | * If formated with metadata, the block layer always provides a |
| 726 | * metadata buffer if CONFIG_BLK_DEV_INTEGRITY is enabled. Else |
| 727 | * we enable the PRACT bit for protection information or set the |
| 728 | * namespace capacity to zero to prevent any I/O. |
| 729 | */ |
| 730 | if (!blk_integrity_rq(req)) { |
| 731 | if (WARN_ON_ONCE(!nvme_ns_has_pi(ns))) |
| 732 | return BLK_STS_NOTSUPP; |
| 733 | control |= NVME_RW_PRINFO_PRACT; |
| 734 | } |
| 735 | |
Ming Lin | 8093f7c | 2016-04-12 13:10:14 -0600 | [diff] [blame] | 736 | switch (ns->pi_type) { |
| 737 | case NVME_NS_DPS_PI_TYPE3: |
| 738 | control |= NVME_RW_PRINFO_PRCHK_GUARD; |
| 739 | break; |
| 740 | case NVME_NS_DPS_PI_TYPE1: |
| 741 | case NVME_NS_DPS_PI_TYPE2: |
| 742 | control |= NVME_RW_PRINFO_PRCHK_GUARD | |
| 743 | NVME_RW_PRINFO_PRCHK_REF; |
Keith Busch | 240e6ee | 2020-06-29 12:06:41 -0700 | [diff] [blame] | 744 | if (op == nvme_cmd_zone_append) |
| 745 | control |= NVME_RW_APPEND_PIREMAP; |
Max Gurtovoy | ddd0bc7 | 2018-07-30 00:15:31 +0300 | [diff] [blame] | 746 | cmnd->rw.reftag = cpu_to_le32(t10_pi_ref_tag(req)); |
Ming Lin | 8093f7c | 2016-04-12 13:10:14 -0600 | [diff] [blame] | 747 | break; |
| 748 | } |
Ming Lin | 8093f7c | 2016-04-12 13:10:14 -0600 | [diff] [blame] | 749 | } |
| 750 | |
| 751 | cmnd->rw.control = cpu_to_le16(control); |
| 752 | cmnd->rw.dsmgmt = cpu_to_le32(dsmgmt); |
Christoph Hellwig | ebe6d87 | 2017-06-12 18:36:32 +0200 | [diff] [blame] | 753 | return 0; |
Ming Lin | 8093f7c | 2016-04-12 13:10:14 -0600 | [diff] [blame] | 754 | } |
| 755 | |
Max Gurtovoy | f7f1fc3 | 2018-07-30 00:15:33 +0300 | [diff] [blame] | 756 | void nvme_cleanup_cmd(struct request *req) |
| 757 | { |
Max Gurtovoy | f7f1fc3 | 2018-07-30 00:15:33 +0300 | [diff] [blame] | 758 | if (req->rq_flags & RQF_SPECIAL_PAYLOAD) { |
Jens Axboe | cb5b726 | 2018-12-12 09:18:11 -0700 | [diff] [blame] | 759 | struct nvme_ns *ns = req->rq_disk->private_data; |
| 760 | struct page *page = req->special_vec.bv_page; |
| 761 | |
| 762 | if (page == ns->ctrl->discard_page) |
| 763 | clear_bit_unlock(0, &ns->ctrl->discard_page_busy); |
| 764 | else |
| 765 | kfree(page_address(page) + req->special_vec.bv_offset); |
Max Gurtovoy | f7f1fc3 | 2018-07-30 00:15:33 +0300 | [diff] [blame] | 766 | } |
| 767 | } |
| 768 | EXPORT_SYMBOL_GPL(nvme_cleanup_cmd); |
| 769 | |
Christoph Hellwig | fc17b65 | 2017-06-03 09:38:05 +0200 | [diff] [blame] | 770 | blk_status_t nvme_setup_cmd(struct nvme_ns *ns, struct request *req, |
Ming Lin | 8093f7c | 2016-04-12 13:10:14 -0600 | [diff] [blame] | 771 | struct nvme_command *cmd) |
| 772 | { |
Christoph Hellwig | fc17b65 | 2017-06-03 09:38:05 +0200 | [diff] [blame] | 773 | blk_status_t ret = BLK_STS_OK; |
Ming Lin | 8093f7c | 2016-04-12 13:10:14 -0600 | [diff] [blame] | 774 | |
James Smart | bb06ec31 | 2018-04-12 09:16:15 -0600 | [diff] [blame] | 775 | nvme_clear_nvme_request(req); |
Christoph Hellwig | 987f699 | 2017-04-05 19:18:08 +0200 | [diff] [blame] | 776 | |
Chaitanya Kulkarni | 1190203 | 2018-10-29 16:44:18 -0700 | [diff] [blame] | 777 | memset(cmd, 0, sizeof(*cmd)); |
Christoph Hellwig | aebf526 | 2017-01-31 16:57:31 +0100 | [diff] [blame] | 778 | switch (req_op(req)) { |
| 779 | case REQ_OP_DRV_IN: |
| 780 | case REQ_OP_DRV_OUT: |
Logan Gunthorpe | 2bf5d3b | 2020-07-24 11:25:12 -0600 | [diff] [blame] | 781 | nvme_setup_passthrough(req, cmd); |
Christoph Hellwig | aebf526 | 2017-01-31 16:57:31 +0100 | [diff] [blame] | 782 | break; |
| 783 | case REQ_OP_FLUSH: |
Ming Lin | 8093f7c | 2016-04-12 13:10:14 -0600 | [diff] [blame] | 784 | nvme_setup_flush(ns, cmd); |
Christoph Hellwig | aebf526 | 2017-01-31 16:57:31 +0100 | [diff] [blame] | 785 | break; |
Keith Busch | 240e6ee | 2020-06-29 12:06:41 -0700 | [diff] [blame] | 786 | case REQ_OP_ZONE_RESET_ALL: |
| 787 | case REQ_OP_ZONE_RESET: |
| 788 | ret = nvme_setup_zone_mgmt_send(ns, req, cmd, NVME_ZONE_RESET); |
| 789 | break; |
| 790 | case REQ_OP_ZONE_OPEN: |
| 791 | ret = nvme_setup_zone_mgmt_send(ns, req, cmd, NVME_ZONE_OPEN); |
| 792 | break; |
| 793 | case REQ_OP_ZONE_CLOSE: |
| 794 | ret = nvme_setup_zone_mgmt_send(ns, req, cmd, NVME_ZONE_CLOSE); |
| 795 | break; |
| 796 | case REQ_OP_ZONE_FINISH: |
| 797 | ret = nvme_setup_zone_mgmt_send(ns, req, cmd, NVME_ZONE_FINISH); |
| 798 | break; |
Christoph Hellwig | e850fd1 | 2017-04-05 19:21:13 +0200 | [diff] [blame] | 799 | case REQ_OP_WRITE_ZEROES: |
Chaitanya Kulkarni | 6e02318 | 2018-12-17 22:42:03 -0500 | [diff] [blame] | 800 | ret = nvme_setup_write_zeroes(ns, req, cmd); |
| 801 | break; |
Christoph Hellwig | aebf526 | 2017-01-31 16:57:31 +0100 | [diff] [blame] | 802 | case REQ_OP_DISCARD: |
Ming Lin | 8093f7c | 2016-04-12 13:10:14 -0600 | [diff] [blame] | 803 | ret = nvme_setup_discard(ns, req, cmd); |
Christoph Hellwig | aebf526 | 2017-01-31 16:57:31 +0100 | [diff] [blame] | 804 | break; |
| 805 | case REQ_OP_READ: |
Keith Busch | 240e6ee | 2020-06-29 12:06:41 -0700 | [diff] [blame] | 806 | ret = nvme_setup_rw(ns, req, cmd, nvme_cmd_read); |
| 807 | break; |
Christoph Hellwig | aebf526 | 2017-01-31 16:57:31 +0100 | [diff] [blame] | 808 | case REQ_OP_WRITE: |
Keith Busch | 240e6ee | 2020-06-29 12:06:41 -0700 | [diff] [blame] | 809 | ret = nvme_setup_rw(ns, req, cmd, nvme_cmd_write); |
| 810 | break; |
| 811 | case REQ_OP_ZONE_APPEND: |
| 812 | ret = nvme_setup_rw(ns, req, cmd, nvme_cmd_zone_append); |
Christoph Hellwig | aebf526 | 2017-01-31 16:57:31 +0100 | [diff] [blame] | 813 | break; |
| 814 | default: |
| 815 | WARN_ON_ONCE(1); |
Christoph Hellwig | fc17b65 | 2017-06-03 09:38:05 +0200 | [diff] [blame] | 816 | return BLK_STS_IOERR; |
Christoph Hellwig | aebf526 | 2017-01-31 16:57:31 +0100 | [diff] [blame] | 817 | } |
Ming Lin | 8093f7c | 2016-04-12 13:10:14 -0600 | [diff] [blame] | 818 | |
James Smart | 721b391 | 2016-10-21 23:33:34 +0300 | [diff] [blame] | 819 | cmd->common.command_id = req->tag; |
Keith Busch | 5d87eb9 | 2018-06-29 16:50:01 -0600 | [diff] [blame] | 820 | trace_nvme_setup_cmd(req, cmd); |
Ming Lin | 8093f7c | 2016-04-12 13:10:14 -0600 | [diff] [blame] | 821 | return ret; |
| 822 | } |
| 823 | EXPORT_SYMBOL_GPL(nvme_setup_cmd); |
| 824 | |
Sagi Grimberg | 6287b51 | 2018-12-14 11:06:07 -0800 | [diff] [blame] | 825 | static void nvme_end_sync_rq(struct request *rq, blk_status_t error) |
| 826 | { |
| 827 | struct completion *waiting = rq->end_io_data; |
| 828 | |
| 829 | rq->end_io_data = NULL; |
| 830 | complete(waiting); |
| 831 | } |
| 832 | |
| 833 | static void nvme_execute_rq_polled(struct request_queue *q, |
| 834 | struct gendisk *bd_disk, struct request *rq, int at_head) |
| 835 | { |
| 836 | DECLARE_COMPLETION_ONSTACK(wait); |
| 837 | |
| 838 | WARN_ON_ONCE(!test_bit(QUEUE_FLAG_POLL, &q->queue_flags)); |
| 839 | |
| 840 | rq->cmd_flags |= REQ_HIPRI; |
| 841 | rq->end_io_data = &wait; |
| 842 | blk_execute_rq_nowait(q, bd_disk, rq, at_head, nvme_end_sync_rq); |
| 843 | |
| 844 | while (!completion_done(&wait)) { |
| 845 | blk_poll(q, request_to_qc_t(rq->mq_hctx, rq), true); |
| 846 | cond_resched(); |
| 847 | } |
| 848 | } |
| 849 | |
Christoph Hellwig | 4160982 | 2015-11-20 09:00:02 +0100 | [diff] [blame] | 850 | /* |
| 851 | * Returns 0 on success. If the result is negative, it's a Linux error code; |
| 852 | * if the result is positive, it's an NVM Express status code |
| 853 | */ |
| 854 | int __nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd, |
Christoph Hellwig | d49187e | 2016-11-10 07:32:33 -0800 | [diff] [blame] | 855 | union nvme_result *result, void *buffer, unsigned bufflen, |
Bart Van Assche | 9a95e4e | 2017-11-09 10:49:59 -0800 | [diff] [blame] | 856 | unsigned timeout, int qid, int at_head, |
Sagi Grimberg | 6287b51 | 2018-12-14 11:06:07 -0800 | [diff] [blame] | 857 | blk_mq_req_flags_t flags, bool poll) |
Christoph Hellwig | 4160982 | 2015-11-20 09:00:02 +0100 | [diff] [blame] | 858 | { |
| 859 | struct request *req; |
| 860 | int ret; |
| 861 | |
Christoph Hellwig | eb71f43 | 2016-06-13 16:45:23 +0200 | [diff] [blame] | 862 | req = nvme_alloc_request(q, cmd, flags, qid); |
Christoph Hellwig | 4160982 | 2015-11-20 09:00:02 +0100 | [diff] [blame] | 863 | if (IS_ERR(req)) |
| 864 | return PTR_ERR(req); |
| 865 | |
| 866 | req->timeout = timeout ? timeout : ADMIN_TIMEOUT; |
| 867 | |
Christoph Hellwig | 21d3471 | 2015-11-26 09:08:36 +0100 | [diff] [blame] | 868 | if (buffer && bufflen) { |
| 869 | ret = blk_rq_map_kern(q, req, buffer, bufflen, GFP_KERNEL); |
| 870 | if (ret) |
| 871 | goto out; |
Christoph Hellwig | 4160982 | 2015-11-20 09:00:02 +0100 | [diff] [blame] | 872 | } |
| 873 | |
Sagi Grimberg | 6287b51 | 2018-12-14 11:06:07 -0800 | [diff] [blame] | 874 | if (poll) |
| 875 | nvme_execute_rq_polled(req->q, NULL, req, at_head); |
| 876 | else |
| 877 | blk_execute_rq(req->q, NULL, req, at_head); |
Christoph Hellwig | d49187e | 2016-11-10 07:32:33 -0800 | [diff] [blame] | 878 | if (result) |
| 879 | *result = nvme_req(req)->result; |
Christoph Hellwig | 27fa9bc | 2017-04-20 16:02:57 +0200 | [diff] [blame] | 880 | if (nvme_req(req)->flags & NVME_REQ_CANCELLED) |
| 881 | ret = -EINTR; |
| 882 | else |
| 883 | ret = nvme_req(req)->status; |
Christoph Hellwig | 4160982 | 2015-11-20 09:00:02 +0100 | [diff] [blame] | 884 | out: |
| 885 | blk_mq_free_request(req); |
| 886 | return ret; |
| 887 | } |
Christoph Hellwig | eb71f43 | 2016-06-13 16:45:23 +0200 | [diff] [blame] | 888 | EXPORT_SYMBOL_GPL(__nvme_submit_sync_cmd); |
Christoph Hellwig | 4160982 | 2015-11-20 09:00:02 +0100 | [diff] [blame] | 889 | |
| 890 | int nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd, |
| 891 | void *buffer, unsigned bufflen) |
| 892 | { |
Christoph Hellwig | eb71f43 | 2016-06-13 16:45:23 +0200 | [diff] [blame] | 893 | return __nvme_submit_sync_cmd(q, cmd, NULL, buffer, bufflen, 0, |
Sagi Grimberg | 6287b51 | 2018-12-14 11:06:07 -0800 | [diff] [blame] | 894 | NVME_QID_ANY, 0, 0, false); |
Christoph Hellwig | 4160982 | 2015-11-20 09:00:02 +0100 | [diff] [blame] | 895 | } |
Ming Lin | 576d55d | 2016-02-10 10:03:32 -0800 | [diff] [blame] | 896 | EXPORT_SYMBOL_GPL(nvme_submit_sync_cmd); |
Christoph Hellwig | 4160982 | 2015-11-20 09:00:02 +0100 | [diff] [blame] | 897 | |
Christoph Hellwig | 1cad656 | 2017-08-29 17:46:01 -0400 | [diff] [blame] | 898 | static void *nvme_add_user_metadata(struct bio *bio, void __user *ubuf, |
| 899 | unsigned len, u32 seed, bool write) |
| 900 | { |
| 901 | struct bio_integrity_payload *bip; |
| 902 | int ret = -ENOMEM; |
| 903 | void *buf; |
| 904 | |
| 905 | buf = kmalloc(len, GFP_KERNEL); |
| 906 | if (!buf) |
| 907 | goto out; |
| 908 | |
| 909 | ret = -EFAULT; |
| 910 | if (write && copy_from_user(buf, ubuf, len)) |
| 911 | goto out_free_meta; |
| 912 | |
| 913 | bip = bio_integrity_alloc(bio, GFP_KERNEL, 1); |
| 914 | if (IS_ERR(bip)) { |
| 915 | ret = PTR_ERR(bip); |
| 916 | goto out_free_meta; |
| 917 | } |
| 918 | |
| 919 | bip->bip_iter.bi_size = len; |
| 920 | bip->bip_iter.bi_sector = seed; |
| 921 | ret = bio_integrity_add_page(bio, virt_to_page(buf), len, |
| 922 | offset_in_page(buf)); |
| 923 | if (ret == len) |
| 924 | return buf; |
| 925 | ret = -ENOMEM; |
| 926 | out_free_meta: |
| 927 | kfree(buf); |
| 928 | out: |
| 929 | return ERR_PTR(ret); |
| 930 | } |
| 931 | |
Logan Gunthorpe | df21b6b | 2020-07-24 11:25:13 -0600 | [diff] [blame] | 932 | static u32 nvme_known_admin_effects(u8 opcode) |
| 933 | { |
| 934 | switch (opcode) { |
| 935 | case nvme_admin_format_nvm: |
| 936 | return NVME_CMD_EFFECTS_CSUPP | NVME_CMD_EFFECTS_LBCC | |
| 937 | NVME_CMD_EFFECTS_CSE_MASK; |
| 938 | case nvme_admin_sanitize_nvm: |
| 939 | return NVME_CMD_EFFECTS_CSE_MASK; |
| 940 | default: |
| 941 | break; |
| 942 | } |
| 943 | return 0; |
| 944 | } |
| 945 | |
| 946 | u32 nvme_command_effects(struct nvme_ctrl *ctrl, struct nvme_ns *ns, u8 opcode) |
| 947 | { |
| 948 | u32 effects = 0; |
| 949 | |
| 950 | if (ns) { |
| 951 | if (ns->head->effects) |
| 952 | effects = le32_to_cpu(ns->head->effects->iocs[opcode]); |
| 953 | if (effects & ~(NVME_CMD_EFFECTS_CSUPP | NVME_CMD_EFFECTS_LBCC)) |
| 954 | dev_warn(ctrl->device, |
| 955 | "IO command:%02x has unhandled effects:%08x\n", |
| 956 | opcode, effects); |
| 957 | return 0; |
| 958 | } |
| 959 | |
| 960 | if (ctrl->effects) |
| 961 | effects = le32_to_cpu(ctrl->effects->acs[opcode]); |
| 962 | effects |= nvme_known_admin_effects(opcode); |
| 963 | |
| 964 | return effects; |
| 965 | } |
| 966 | EXPORT_SYMBOL_NS_GPL(nvme_command_effects, NVME_TARGET_PASSTHRU); |
| 967 | |
| 968 | static u32 nvme_passthru_start(struct nvme_ctrl *ctrl, struct nvme_ns *ns, |
| 969 | u8 opcode) |
| 970 | { |
| 971 | u32 effects = nvme_command_effects(ctrl, ns, opcode); |
| 972 | |
| 973 | /* |
| 974 | * For simplicity, IO to all namespaces is quiesced even if the command |
| 975 | * effects say only one namespace is affected. |
| 976 | */ |
| 977 | if (effects & (NVME_CMD_EFFECTS_LBCC | NVME_CMD_EFFECTS_CSE_MASK)) { |
| 978 | mutex_lock(&ctrl->scan_lock); |
| 979 | mutex_lock(&ctrl->subsys->lock); |
| 980 | nvme_mpath_start_freeze(ctrl->subsys); |
| 981 | nvme_mpath_wait_freeze(ctrl->subsys); |
| 982 | nvme_start_freeze(ctrl); |
| 983 | nvme_wait_freeze(ctrl); |
| 984 | } |
| 985 | return effects; |
| 986 | } |
| 987 | |
| 988 | static void nvme_update_formats(struct nvme_ctrl *ctrl, u32 *effects) |
| 989 | { |
| 990 | struct nvme_ns *ns; |
| 991 | |
| 992 | down_read(&ctrl->namespaces_rwsem); |
| 993 | list_for_each_entry(ns, &ctrl->namespaces, list) |
| 994 | if (_nvme_revalidate_disk(ns->disk)) |
| 995 | nvme_set_queue_dying(ns); |
| 996 | else if (blk_queue_is_zoned(ns->disk->queue)) { |
| 997 | /* |
| 998 | * IO commands are required to fully revalidate a zoned |
| 999 | * device. Force the command effects to trigger rescan |
| 1000 | * work so report zones can run in a context with |
| 1001 | * unfrozen IO queues. |
| 1002 | */ |
| 1003 | *effects |= NVME_CMD_EFFECTS_NCC; |
| 1004 | } |
| 1005 | up_read(&ctrl->namespaces_rwsem); |
| 1006 | } |
| 1007 | |
| 1008 | static void nvme_passthru_end(struct nvme_ctrl *ctrl, u32 effects) |
| 1009 | { |
| 1010 | /* |
| 1011 | * Revalidate LBA changes prior to unfreezing. This is necessary to |
| 1012 | * prevent memory corruption if a logical block size was changed by |
| 1013 | * this command. |
| 1014 | */ |
| 1015 | if (effects & NVME_CMD_EFFECTS_LBCC) |
| 1016 | nvme_update_formats(ctrl, &effects); |
| 1017 | if (effects & (NVME_CMD_EFFECTS_LBCC | NVME_CMD_EFFECTS_CSE_MASK)) { |
| 1018 | nvme_unfreeze(ctrl); |
| 1019 | nvme_mpath_unfreeze(ctrl->subsys); |
| 1020 | mutex_unlock(&ctrl->subsys->lock); |
| 1021 | nvme_remove_invalid_namespaces(ctrl, NVME_NSID_ALL); |
| 1022 | mutex_unlock(&ctrl->scan_lock); |
| 1023 | } |
| 1024 | if (effects & NVME_CMD_EFFECTS_CCC) |
| 1025 | nvme_init_identify(ctrl); |
| 1026 | if (effects & (NVME_CMD_EFFECTS_NIC | NVME_CMD_EFFECTS_NCC)) { |
| 1027 | nvme_queue_scan(ctrl); |
| 1028 | flush_work(&ctrl->scan_work); |
| 1029 | } |
| 1030 | } |
| 1031 | |
Logan Gunthorpe | 17365ae | 2020-07-24 11:25:14 -0600 | [diff] [blame] | 1032 | void nvme_execute_passthru_rq(struct request *rq) |
| 1033 | { |
| 1034 | struct nvme_command *cmd = nvme_req(rq)->cmd; |
| 1035 | struct nvme_ctrl *ctrl = nvme_req(rq)->ctrl; |
| 1036 | struct nvme_ns *ns = rq->q->queuedata; |
| 1037 | struct gendisk *disk = ns ? ns->disk : NULL; |
| 1038 | u32 effects; |
| 1039 | |
| 1040 | effects = nvme_passthru_start(ctrl, ns, cmd->common.opcode); |
| 1041 | blk_execute_rq(rq->q, disk, rq, 0); |
| 1042 | nvme_passthru_end(ctrl, effects); |
| 1043 | } |
| 1044 | EXPORT_SYMBOL_NS_GPL(nvme_execute_passthru_rq, NVME_TARGET_PASSTHRU); |
| 1045 | |
Keith Busch | 63263d6 | 2017-08-29 17:46:04 -0400 | [diff] [blame] | 1046 | static int nvme_submit_user_cmd(struct request_queue *q, |
Keith Busch | 485783c | 2017-08-29 17:46:03 -0400 | [diff] [blame] | 1047 | struct nvme_command *cmd, void __user *ubuffer, |
| 1048 | unsigned bufflen, void __user *meta_buffer, unsigned meta_len, |
Marta Rybczynska | 65e68ed | 2019-09-24 15:14:52 +0200 | [diff] [blame] | 1049 | u32 meta_seed, u64 *result, unsigned timeout) |
Christoph Hellwig | 4160982 | 2015-11-20 09:00:02 +0100 | [diff] [blame] | 1050 | { |
Christoph Hellwig | 7a5abb4 | 2016-06-06 23:20:49 +0200 | [diff] [blame] | 1051 | bool write = nvme_is_write(cmd); |
Keith Busch | 0b7f1f26 | 2015-10-23 09:47:28 -0600 | [diff] [blame] | 1052 | struct nvme_ns *ns = q->queuedata; |
| 1053 | struct gendisk *disk = ns ? ns->disk : NULL; |
Christoph Hellwig | 4160982 | 2015-11-20 09:00:02 +0100 | [diff] [blame] | 1054 | struct request *req; |
Keith Busch | 0b7f1f26 | 2015-10-23 09:47:28 -0600 | [diff] [blame] | 1055 | struct bio *bio = NULL; |
| 1056 | void *meta = NULL; |
Christoph Hellwig | 4160982 | 2015-11-20 09:00:02 +0100 | [diff] [blame] | 1057 | int ret; |
| 1058 | |
Christoph Hellwig | eb71f43 | 2016-06-13 16:45:23 +0200 | [diff] [blame] | 1059 | req = nvme_alloc_request(q, cmd, 0, NVME_QID_ANY); |
Christoph Hellwig | 4160982 | 2015-11-20 09:00:02 +0100 | [diff] [blame] | 1060 | if (IS_ERR(req)) |
| 1061 | return PTR_ERR(req); |
| 1062 | |
| 1063 | req->timeout = timeout ? timeout : ADMIN_TIMEOUT; |
James Smart | bb06ec31 | 2018-04-12 09:16:15 -0600 | [diff] [blame] | 1064 | nvme_req(req)->flags |= NVME_REQ_USERCMD; |
Christoph Hellwig | 4160982 | 2015-11-20 09:00:02 +0100 | [diff] [blame] | 1065 | |
| 1066 | if (ubuffer && bufflen) { |
Christoph Hellwig | 21d3471 | 2015-11-26 09:08:36 +0100 | [diff] [blame] | 1067 | ret = blk_rq_map_user(q, req, NULL, ubuffer, bufflen, |
| 1068 | GFP_KERNEL); |
| 1069 | if (ret) |
| 1070 | goto out; |
| 1071 | bio = req->bio; |
Christoph Hellwig | 74d4699 | 2017-08-23 19:10:32 +0200 | [diff] [blame] | 1072 | bio->bi_disk = disk; |
Christoph Hellwig | 1cad656 | 2017-08-29 17:46:01 -0400 | [diff] [blame] | 1073 | if (disk && meta_buffer && meta_len) { |
| 1074 | meta = nvme_add_user_metadata(bio, meta_buffer, meta_len, |
| 1075 | meta_seed, write); |
| 1076 | if (IS_ERR(meta)) { |
| 1077 | ret = PTR_ERR(meta); |
Keith Busch | 0b7f1f26 | 2015-10-23 09:47:28 -0600 | [diff] [blame] | 1078 | goto out_unmap; |
| 1079 | } |
Keith Busch | f31a211 | 2018-04-17 14:42:44 -0600 | [diff] [blame] | 1080 | req->cmd_flags |= REQ_INTEGRITY; |
Keith Busch | 0b7f1f26 | 2015-10-23 09:47:28 -0600 | [diff] [blame] | 1081 | } |
| 1082 | } |
Christoph Hellwig | 1cad656 | 2017-08-29 17:46:01 -0400 | [diff] [blame] | 1083 | |
Logan Gunthorpe | 17365ae | 2020-07-24 11:25:14 -0600 | [diff] [blame] | 1084 | nvme_execute_passthru_rq(req); |
Christoph Hellwig | 27fa9bc | 2017-04-20 16:02:57 +0200 | [diff] [blame] | 1085 | if (nvme_req(req)->flags & NVME_REQ_CANCELLED) |
| 1086 | ret = -EINTR; |
| 1087 | else |
| 1088 | ret = nvme_req(req)->status; |
Christoph Hellwig | 21d3471 | 2015-11-26 09:08:36 +0100 | [diff] [blame] | 1089 | if (result) |
Marta Rybczynska | 65e68ed | 2019-09-24 15:14:52 +0200 | [diff] [blame] | 1090 | *result = le64_to_cpu(nvme_req(req)->result.u64); |
Keith Busch | 0b7f1f26 | 2015-10-23 09:47:28 -0600 | [diff] [blame] | 1091 | if (meta && !ret && !write) { |
| 1092 | if (copy_to_user(meta_buffer, meta, meta_len)) |
| 1093 | ret = -EFAULT; |
| 1094 | } |
Keith Busch | 0b7f1f26 | 2015-10-23 09:47:28 -0600 | [diff] [blame] | 1095 | kfree(meta); |
| 1096 | out_unmap: |
Christoph Hellwig | 74d4699 | 2017-08-23 19:10:32 +0200 | [diff] [blame] | 1097 | if (bio) |
Keith Busch | 0b7f1f26 | 2015-10-23 09:47:28 -0600 | [diff] [blame] | 1098 | blk_rq_unmap_user(bio); |
Christoph Hellwig | 21d3471 | 2015-11-26 09:08:36 +0100 | [diff] [blame] | 1099 | out: |
| 1100 | blk_mq_free_request(req); |
| 1101 | return ret; |
| 1102 | } |
| 1103 | |
Christoph Hellwig | 2a842ac | 2017-06-03 09:38:04 +0200 | [diff] [blame] | 1104 | static void nvme_keep_alive_end_io(struct request *rq, blk_status_t status) |
Sagi Grimberg | 038bd4c | 2016-06-13 16:45:28 +0200 | [diff] [blame] | 1105 | { |
| 1106 | struct nvme_ctrl *ctrl = rq->end_io_data; |
James Smart | 86880d6 | 2018-11-27 17:04:44 -0800 | [diff] [blame] | 1107 | unsigned long flags; |
| 1108 | bool startka = false; |
Sagi Grimberg | 038bd4c | 2016-06-13 16:45:28 +0200 | [diff] [blame] | 1109 | |
| 1110 | blk_mq_free_request(rq); |
| 1111 | |
Christoph Hellwig | 2a842ac | 2017-06-03 09:38:04 +0200 | [diff] [blame] | 1112 | if (status) { |
Sagi Grimberg | 038bd4c | 2016-06-13 16:45:28 +0200 | [diff] [blame] | 1113 | dev_err(ctrl->device, |
Christoph Hellwig | 2a842ac | 2017-06-03 09:38:04 +0200 | [diff] [blame] | 1114 | "failed nvme_keep_alive_end_io error=%d\n", |
| 1115 | status); |
Sagi Grimberg | 038bd4c | 2016-06-13 16:45:28 +0200 | [diff] [blame] | 1116 | return; |
| 1117 | } |
| 1118 | |
Sagi Grimberg | 6e3ca03e | 2018-11-02 10:28:15 -0700 | [diff] [blame] | 1119 | ctrl->comp_seen = false; |
James Smart | 86880d6 | 2018-11-27 17:04:44 -0800 | [diff] [blame] | 1120 | spin_lock_irqsave(&ctrl->lock, flags); |
| 1121 | if (ctrl->state == NVME_CTRL_LIVE || |
| 1122 | ctrl->state == NVME_CTRL_CONNECTING) |
| 1123 | startka = true; |
| 1124 | spin_unlock_irqrestore(&ctrl->lock, flags); |
| 1125 | if (startka) |
Nigel Kirkland | 97b2512 | 2020-02-10 16:01:45 -0800 | [diff] [blame] | 1126 | queue_delayed_work(nvme_wq, &ctrl->ka_work, ctrl->kato * HZ); |
Sagi Grimberg | 038bd4c | 2016-06-13 16:45:28 +0200 | [diff] [blame] | 1127 | } |
| 1128 | |
| 1129 | static int nvme_keep_alive(struct nvme_ctrl *ctrl) |
| 1130 | { |
Sagi Grimberg | 038bd4c | 2016-06-13 16:45:28 +0200 | [diff] [blame] | 1131 | struct request *rq; |
| 1132 | |
Roland Dreier | 0a34e46 | 2018-01-11 13:38:15 -0800 | [diff] [blame] | 1133 | rq = nvme_alloc_request(ctrl->admin_q, &ctrl->ka_cmd, BLK_MQ_REQ_RESERVED, |
Sagi Grimberg | 038bd4c | 2016-06-13 16:45:28 +0200 | [diff] [blame] | 1134 | NVME_QID_ANY); |
| 1135 | if (IS_ERR(rq)) |
| 1136 | return PTR_ERR(rq); |
| 1137 | |
| 1138 | rq->timeout = ctrl->kato * HZ; |
| 1139 | rq->end_io_data = ctrl; |
| 1140 | |
| 1141 | blk_execute_rq_nowait(rq->q, NULL, rq, 0, nvme_keep_alive_end_io); |
| 1142 | |
| 1143 | return 0; |
| 1144 | } |
| 1145 | |
| 1146 | static void nvme_keep_alive_work(struct work_struct *work) |
| 1147 | { |
| 1148 | struct nvme_ctrl *ctrl = container_of(to_delayed_work(work), |
| 1149 | struct nvme_ctrl, ka_work); |
Sagi Grimberg | 6e3ca03e | 2018-11-02 10:28:15 -0700 | [diff] [blame] | 1150 | bool comp_seen = ctrl->comp_seen; |
| 1151 | |
| 1152 | if ((ctrl->ctratt & NVME_CTRL_ATTR_TBKAS) && comp_seen) { |
| 1153 | dev_dbg(ctrl->device, |
| 1154 | "reschedule traffic based keep-alive timer\n"); |
| 1155 | ctrl->comp_seen = false; |
Nigel Kirkland | 97b2512 | 2020-02-10 16:01:45 -0800 | [diff] [blame] | 1156 | queue_delayed_work(nvme_wq, &ctrl->ka_work, ctrl->kato * HZ); |
Sagi Grimberg | 6e3ca03e | 2018-11-02 10:28:15 -0700 | [diff] [blame] | 1157 | return; |
| 1158 | } |
Sagi Grimberg | 038bd4c | 2016-06-13 16:45:28 +0200 | [diff] [blame] | 1159 | |
| 1160 | if (nvme_keep_alive(ctrl)) { |
| 1161 | /* allocation failure, reset the controller */ |
| 1162 | dev_err(ctrl->device, "keep-alive failed\n"); |
Christoph Hellwig | 39bdc59 | 2017-06-12 18:21:19 +0200 | [diff] [blame] | 1163 | nvme_reset_ctrl(ctrl); |
Sagi Grimberg | 038bd4c | 2016-06-13 16:45:28 +0200 | [diff] [blame] | 1164 | return; |
| 1165 | } |
| 1166 | } |
| 1167 | |
Johannes Thumshirn | 00b683d | 2018-04-12 09:16:05 -0600 | [diff] [blame] | 1168 | static void nvme_start_keep_alive(struct nvme_ctrl *ctrl) |
Sagi Grimberg | 038bd4c | 2016-06-13 16:45:28 +0200 | [diff] [blame] | 1169 | { |
| 1170 | if (unlikely(ctrl->kato == 0)) |
| 1171 | return; |
| 1172 | |
Nigel Kirkland | 97b2512 | 2020-02-10 16:01:45 -0800 | [diff] [blame] | 1173 | queue_delayed_work(nvme_wq, &ctrl->ka_work, ctrl->kato * HZ); |
Sagi Grimberg | 038bd4c | 2016-06-13 16:45:28 +0200 | [diff] [blame] | 1174 | } |
Sagi Grimberg | 038bd4c | 2016-06-13 16:45:28 +0200 | [diff] [blame] | 1175 | |
| 1176 | void nvme_stop_keep_alive(struct nvme_ctrl *ctrl) |
| 1177 | { |
| 1178 | if (unlikely(ctrl->kato == 0)) |
| 1179 | return; |
| 1180 | |
| 1181 | cancel_delayed_work_sync(&ctrl->ka_work); |
| 1182 | } |
| 1183 | EXPORT_SYMBOL_GPL(nvme_stop_keep_alive); |
| 1184 | |
Christoph Hellwig | b9a5c3d | 2020-04-04 10:11:28 +0200 | [diff] [blame] | 1185 | /* |
| 1186 | * In NVMe 1.0 the CNS field was just a binary controller or namespace |
| 1187 | * flag, thus sending any new CNS opcodes has a big chance of not working. |
| 1188 | * Qemu unfortunately had that bug after reporting a 1.1 version compliance |
| 1189 | * (but not for any later version). |
| 1190 | */ |
| 1191 | static bool nvme_ctrl_limited_cns(struct nvme_ctrl *ctrl) |
| 1192 | { |
| 1193 | if (ctrl->quirks & NVME_QUIRK_IDENTIFY_CNS) |
| 1194 | return ctrl->vs < NVME_VS(1, 2, 0); |
| 1195 | return ctrl->vs < NVME_VS(1, 1, 0); |
| 1196 | } |
| 1197 | |
Keith Busch | 3f7f25a9 | 2017-06-20 15:09:56 -0400 | [diff] [blame] | 1198 | static int nvme_identify_ctrl(struct nvme_ctrl *dev, struct nvme_id_ctrl **id) |
Christoph Hellwig | 21d3471 | 2015-11-26 09:08:36 +0100 | [diff] [blame] | 1199 | { |
| 1200 | struct nvme_command c = { }; |
| 1201 | int error; |
| 1202 | |
| 1203 | /* gcc-4.4.4 (at least) has issues with initializers and anon unions */ |
| 1204 | c.identify.opcode = nvme_admin_identify; |
Parav Pandit | 986994a | 2017-01-26 17:17:28 +0200 | [diff] [blame] | 1205 | c.identify.cns = NVME_ID_CNS_CTRL; |
Christoph Hellwig | 21d3471 | 2015-11-26 09:08:36 +0100 | [diff] [blame] | 1206 | |
| 1207 | *id = kmalloc(sizeof(struct nvme_id_ctrl), GFP_KERNEL); |
| 1208 | if (!*id) |
| 1209 | return -ENOMEM; |
| 1210 | |
| 1211 | error = nvme_submit_sync_cmd(dev->admin_q, &c, *id, |
| 1212 | sizeof(struct nvme_id_ctrl)); |
| 1213 | if (error) |
| 1214 | kfree(*id); |
| 1215 | return error; |
| 1216 | } |
| 1217 | |
Niklas Cassel | 71010c3 | 2020-06-29 12:06:39 -0700 | [diff] [blame] | 1218 | static bool nvme_multi_css(struct nvme_ctrl *ctrl) |
| 1219 | { |
| 1220 | return (ctrl->ctrl_config & NVME_CC_CSS_MASK) == NVME_CC_CSS_CSI; |
| 1221 | } |
| 1222 | |
Chaitanya Kulkarni | ad95a61 | 2020-02-19 08:14:31 -0800 | [diff] [blame] | 1223 | static int nvme_process_ns_desc(struct nvme_ctrl *ctrl, struct nvme_ns_ids *ids, |
Niklas Cassel | 71010c3 | 2020-06-29 12:06:39 -0700 | [diff] [blame] | 1224 | struct nvme_ns_id_desc *cur, bool *csi_seen) |
Chaitanya Kulkarni | ad95a61 | 2020-02-19 08:14:31 -0800 | [diff] [blame] | 1225 | { |
| 1226 | const char *warn_str = "ctrl returned bogus length:"; |
| 1227 | void *data = cur; |
| 1228 | |
| 1229 | switch (cur->nidt) { |
| 1230 | case NVME_NIDT_EUI64: |
| 1231 | if (cur->nidl != NVME_NIDT_EUI64_LEN) { |
| 1232 | dev_warn(ctrl->device, "%s %d for NVME_NIDT_EUI64\n", |
| 1233 | warn_str, cur->nidl); |
| 1234 | return -1; |
| 1235 | } |
| 1236 | memcpy(ids->eui64, data + sizeof(*cur), NVME_NIDT_EUI64_LEN); |
| 1237 | return NVME_NIDT_EUI64_LEN; |
| 1238 | case NVME_NIDT_NGUID: |
| 1239 | if (cur->nidl != NVME_NIDT_NGUID_LEN) { |
| 1240 | dev_warn(ctrl->device, "%s %d for NVME_NIDT_NGUID\n", |
| 1241 | warn_str, cur->nidl); |
| 1242 | return -1; |
| 1243 | } |
| 1244 | memcpy(ids->nguid, data + sizeof(*cur), NVME_NIDT_NGUID_LEN); |
| 1245 | return NVME_NIDT_NGUID_LEN; |
| 1246 | case NVME_NIDT_UUID: |
| 1247 | if (cur->nidl != NVME_NIDT_UUID_LEN) { |
| 1248 | dev_warn(ctrl->device, "%s %d for NVME_NIDT_UUID\n", |
| 1249 | warn_str, cur->nidl); |
| 1250 | return -1; |
| 1251 | } |
| 1252 | uuid_copy(&ids->uuid, data + sizeof(*cur)); |
| 1253 | return NVME_NIDT_UUID_LEN; |
Niklas Cassel | 71010c3 | 2020-06-29 12:06:39 -0700 | [diff] [blame] | 1254 | case NVME_NIDT_CSI: |
| 1255 | if (cur->nidl != NVME_NIDT_CSI_LEN) { |
| 1256 | dev_warn(ctrl->device, "%s %d for NVME_NIDT_CSI\n", |
| 1257 | warn_str, cur->nidl); |
| 1258 | return -1; |
| 1259 | } |
| 1260 | memcpy(&ids->csi, data + sizeof(*cur), NVME_NIDT_CSI_LEN); |
| 1261 | *csi_seen = true; |
| 1262 | return NVME_NIDT_CSI_LEN; |
Chaitanya Kulkarni | ad95a61 | 2020-02-19 08:14:31 -0800 | [diff] [blame] | 1263 | default: |
| 1264 | /* Skip unknown types */ |
| 1265 | return cur->nidl; |
| 1266 | } |
| 1267 | } |
| 1268 | |
Christoph Hellwig | cdbff4f | 2017-08-16 16:14:47 +0200 | [diff] [blame] | 1269 | static int nvme_identify_ns_descs(struct nvme_ctrl *ctrl, unsigned nsid, |
Christoph Hellwig | 002fab0 | 2017-11-09 13:50:16 +0100 | [diff] [blame] | 1270 | struct nvme_ns_ids *ids) |
Johannes Thumshirn | 3b22ba2 | 2017-06-07 11:45:34 +0200 | [diff] [blame] | 1271 | { |
| 1272 | struct nvme_command c = { }; |
Niklas Cassel | 71010c3 | 2020-06-29 12:06:39 -0700 | [diff] [blame] | 1273 | bool csi_seen = false; |
| 1274 | int status, pos, len; |
Johannes Thumshirn | 3b22ba2 | 2017-06-07 11:45:34 +0200 | [diff] [blame] | 1275 | void *data; |
Johannes Thumshirn | 3b22ba2 | 2017-06-07 11:45:34 +0200 | [diff] [blame] | 1276 | |
Christoph Hellwig | 5bedd3a | 2020-07-28 13:09:03 +0200 | [diff] [blame] | 1277 | if (ctrl->quirks & NVME_QUIRK_NO_NS_DESC_LIST) |
| 1278 | return 0; |
| 1279 | |
Johannes Thumshirn | 3b22ba2 | 2017-06-07 11:45:34 +0200 | [diff] [blame] | 1280 | c.identify.opcode = nvme_admin_identify; |
| 1281 | c.identify.nsid = cpu_to_le32(nsid); |
| 1282 | c.identify.cns = NVME_ID_CNS_NS_DESC_LIST; |
| 1283 | |
| 1284 | data = kzalloc(NVME_IDENTIFY_DATA_SIZE, GFP_KERNEL); |
| 1285 | if (!data) |
| 1286 | return -ENOMEM; |
| 1287 | |
Christoph Hellwig | cdbff4f | 2017-08-16 16:14:47 +0200 | [diff] [blame] | 1288 | status = nvme_submit_sync_cmd(ctrl->admin_q, &c, data, |
Johannes Thumshirn | 3b22ba2 | 2017-06-07 11:45:34 +0200 | [diff] [blame] | 1289 | NVME_IDENTIFY_DATA_SIZE); |
Christoph Hellwig | fb314eb | 2020-03-25 14:19:35 +0100 | [diff] [blame] | 1290 | if (status) { |
| 1291 | dev_warn(ctrl->device, |
| 1292 | "Identify Descriptors failed (%d)\n", status); |
Johannes Thumshirn | 3b22ba2 | 2017-06-07 11:45:34 +0200 | [diff] [blame] | 1293 | goto free_data; |
Christoph Hellwig | fb314eb | 2020-03-25 14:19:35 +0100 | [diff] [blame] | 1294 | } |
Johannes Thumshirn | 3b22ba2 | 2017-06-07 11:45:34 +0200 | [diff] [blame] | 1295 | |
| 1296 | for (pos = 0; pos < NVME_IDENTIFY_DATA_SIZE; pos += len) { |
| 1297 | struct nvme_ns_id_desc *cur = data + pos; |
| 1298 | |
| 1299 | if (cur->nidl == 0) |
| 1300 | break; |
| 1301 | |
Niklas Cassel | 71010c3 | 2020-06-29 12:06:39 -0700 | [diff] [blame] | 1302 | len = nvme_process_ns_desc(ctrl, ids, cur, &csi_seen); |
Chaitanya Kulkarni | ad95a61 | 2020-02-19 08:14:31 -0800 | [diff] [blame] | 1303 | if (len < 0) |
Niklas Cassel | 71010c3 | 2020-06-29 12:06:39 -0700 | [diff] [blame] | 1304 | break; |
Johannes Thumshirn | 3b22ba2 | 2017-06-07 11:45:34 +0200 | [diff] [blame] | 1305 | |
| 1306 | len += sizeof(*cur); |
| 1307 | } |
Niklas Cassel | 71010c3 | 2020-06-29 12:06:39 -0700 | [diff] [blame] | 1308 | |
| 1309 | if (nvme_multi_css(ctrl) && !csi_seen) { |
| 1310 | dev_warn(ctrl->device, "Command set not reported for nsid:%d\n", |
| 1311 | nsid); |
| 1312 | status = -EINVAL; |
| 1313 | } |
| 1314 | |
Johannes Thumshirn | 3b22ba2 | 2017-06-07 11:45:34 +0200 | [diff] [blame] | 1315 | free_data: |
| 1316 | kfree(data); |
| 1317 | return status; |
| 1318 | } |
| 1319 | |
Keith Busch | 540c801 | 2015-10-22 15:45:06 -0600 | [diff] [blame] | 1320 | static int nvme_identify_ns_list(struct nvme_ctrl *dev, unsigned nsid, __le32 *ns_list) |
| 1321 | { |
| 1322 | struct nvme_command c = { }; |
| 1323 | |
| 1324 | c.identify.opcode = nvme_admin_identify; |
Parav Pandit | 986994a | 2017-01-26 17:17:28 +0200 | [diff] [blame] | 1325 | c.identify.cns = NVME_ID_CNS_NS_ACTIVE_LIST; |
Keith Busch | 540c801 | 2015-10-22 15:45:06 -0600 | [diff] [blame] | 1326 | c.identify.nsid = cpu_to_le32(nsid); |
Minwoo Im | 42595eb | 2018-02-08 22:56:31 +0900 | [diff] [blame] | 1327 | return nvme_submit_sync_cmd(dev->admin_q, &c, ns_list, |
| 1328 | NVME_IDENTIFY_DATA_SIZE); |
Keith Busch | 540c801 | 2015-10-22 15:45:06 -0600 | [diff] [blame] | 1329 | } |
| 1330 | |
Sagi Grimberg | 331813f | 2019-08-02 18:11:42 -0700 | [diff] [blame] | 1331 | static int nvme_identify_ns(struct nvme_ctrl *ctrl, |
| 1332 | unsigned nsid, struct nvme_id_ns **id) |
Christoph Hellwig | 21d3471 | 2015-11-26 09:08:36 +0100 | [diff] [blame] | 1333 | { |
| 1334 | struct nvme_command c = { }; |
| 1335 | int error; |
| 1336 | |
| 1337 | /* gcc-4.4.4 (at least) has issues with initializers and anon unions */ |
Max Gurtovoy | 778f067 | 2017-01-26 17:17:27 +0200 | [diff] [blame] | 1338 | c.identify.opcode = nvme_admin_identify; |
| 1339 | c.identify.nsid = cpu_to_le32(nsid); |
Parav Pandit | 986994a | 2017-01-26 17:17:28 +0200 | [diff] [blame] | 1340 | c.identify.cns = NVME_ID_CNS_NS; |
Christoph Hellwig | 21d3471 | 2015-11-26 09:08:36 +0100 | [diff] [blame] | 1341 | |
Sagi Grimberg | 331813f | 2019-08-02 18:11:42 -0700 | [diff] [blame] | 1342 | *id = kmalloc(sizeof(**id), GFP_KERNEL); |
| 1343 | if (!*id) |
| 1344 | return -ENOMEM; |
Christoph Hellwig | 21d3471 | 2015-11-26 09:08:36 +0100 | [diff] [blame] | 1345 | |
Sagi Grimberg | 331813f | 2019-08-02 18:11:42 -0700 | [diff] [blame] | 1346 | error = nvme_submit_sync_cmd(ctrl->admin_q, &c, *id, sizeof(**id)); |
Christoph Hellwig | cdbff4f | 2017-08-16 16:14:47 +0200 | [diff] [blame] | 1347 | if (error) { |
Kenneth Heitke | d0de579 | 2019-04-04 12:57:45 -0600 | [diff] [blame] | 1348 | dev_warn(ctrl->device, "Identify namespace failed (%d)\n", error); |
Sagi Grimberg | 331813f | 2019-08-02 18:11:42 -0700 | [diff] [blame] | 1349 | kfree(*id); |
Christoph Hellwig | cdbff4f | 2017-08-16 16:14:47 +0200 | [diff] [blame] | 1350 | } |
| 1351 | |
Sagi Grimberg | 331813f | 2019-08-02 18:11:42 -0700 | [diff] [blame] | 1352 | return error; |
Christoph Hellwig | 21d3471 | 2015-11-26 09:08:36 +0100 | [diff] [blame] | 1353 | } |
| 1354 | |
Keith Busch | 1a87ee6 | 2019-05-27 01:29:01 +0900 | [diff] [blame] | 1355 | static int nvme_features(struct nvme_ctrl *dev, u8 op, unsigned int fid, |
| 1356 | unsigned int dword11, void *buffer, size_t buflen, u32 *result) |
Christoph Hellwig | 21d3471 | 2015-11-26 09:08:36 +0100 | [diff] [blame] | 1357 | { |
Keith Busch | 1575585 | 2020-02-20 00:59:36 +0900 | [diff] [blame] | 1358 | union nvme_result res = { 0 }; |
Christoph Hellwig | 21d3471 | 2015-11-26 09:08:36 +0100 | [diff] [blame] | 1359 | struct nvme_command c; |
Christoph Hellwig | 1cb3cce | 2016-02-29 15:59:47 +0100 | [diff] [blame] | 1360 | int ret; |
Christoph Hellwig | 21d3471 | 2015-11-26 09:08:36 +0100 | [diff] [blame] | 1361 | |
| 1362 | memset(&c, 0, sizeof(c)); |
Keith Busch | 1a87ee6 | 2019-05-27 01:29:01 +0900 | [diff] [blame] | 1363 | c.features.opcode = op; |
Christoph Hellwig | 21d3471 | 2015-11-26 09:08:36 +0100 | [diff] [blame] | 1364 | c.features.fid = cpu_to_le32(fid); |
| 1365 | c.features.dword11 = cpu_to_le32(dword11); |
| 1366 | |
Christoph Hellwig | d49187e | 2016-11-10 07:32:33 -0800 | [diff] [blame] | 1367 | ret = __nvme_submit_sync_cmd(dev->admin_q, &c, &res, |
Sagi Grimberg | 6287b51 | 2018-12-14 11:06:07 -0800 | [diff] [blame] | 1368 | buffer, buflen, 0, NVME_QID_ANY, 0, 0, false); |
Andy Lutomirski | 9b47f77a | 2016-08-24 03:52:12 -0700 | [diff] [blame] | 1369 | if (ret >= 0 && result) |
Christoph Hellwig | d49187e | 2016-11-10 07:32:33 -0800 | [diff] [blame] | 1370 | *result = le32_to_cpu(res.u32); |
Christoph Hellwig | 1cb3cce | 2016-02-29 15:59:47 +0100 | [diff] [blame] | 1371 | return ret; |
Christoph Hellwig | 21d3471 | 2015-11-26 09:08:36 +0100 | [diff] [blame] | 1372 | } |
| 1373 | |
Keith Busch | 1a87ee6 | 2019-05-27 01:29:01 +0900 | [diff] [blame] | 1374 | int nvme_set_features(struct nvme_ctrl *dev, unsigned int fid, |
| 1375 | unsigned int dword11, void *buffer, size_t buflen, |
| 1376 | u32 *result) |
| 1377 | { |
| 1378 | return nvme_features(dev, nvme_admin_set_features, fid, dword11, buffer, |
| 1379 | buflen, result); |
| 1380 | } |
| 1381 | EXPORT_SYMBOL_GPL(nvme_set_features); |
| 1382 | |
| 1383 | int nvme_get_features(struct nvme_ctrl *dev, unsigned int fid, |
| 1384 | unsigned int dword11, void *buffer, size_t buflen, |
| 1385 | u32 *result) |
| 1386 | { |
| 1387 | return nvme_features(dev, nvme_admin_get_features, fid, dword11, buffer, |
| 1388 | buflen, result); |
| 1389 | } |
| 1390 | EXPORT_SYMBOL_GPL(nvme_get_features); |
| 1391 | |
Christoph Hellwig | 9a0be7a | 2015-11-26 11:09:06 +0100 | [diff] [blame] | 1392 | int nvme_set_queue_count(struct nvme_ctrl *ctrl, int *count) |
| 1393 | { |
| 1394 | u32 q_count = (*count - 1) | ((*count - 1) << 16); |
| 1395 | u32 result; |
| 1396 | int status, nr_io_queues; |
| 1397 | |
Andy Lutomirski | 1a6fe74 | 2016-09-16 11:16:10 -0700 | [diff] [blame] | 1398 | status = nvme_set_features(ctrl, NVME_FEAT_NUM_QUEUES, q_count, NULL, 0, |
Christoph Hellwig | 9a0be7a | 2015-11-26 11:09:06 +0100 | [diff] [blame] | 1399 | &result); |
Christoph Hellwig | f5fa90d | 2016-06-06 23:20:50 +0200 | [diff] [blame] | 1400 | if (status < 0) |
Christoph Hellwig | 9a0be7a | 2015-11-26 11:09:06 +0100 | [diff] [blame] | 1401 | return status; |
| 1402 | |
Christoph Hellwig | f5fa90d | 2016-06-06 23:20:50 +0200 | [diff] [blame] | 1403 | /* |
| 1404 | * Degraded controllers might return an error when setting the queue |
| 1405 | * count. We still want to be able to bring them online and offer |
| 1406 | * access to the admin queue, as that might be only way to fix them up. |
| 1407 | */ |
| 1408 | if (status > 0) { |
Johannes Thumshirn | f0425db | 2017-06-09 16:17:21 +0200 | [diff] [blame] | 1409 | dev_err(ctrl->device, "Could not set queue count (%d)\n", status); |
Christoph Hellwig | f5fa90d | 2016-06-06 23:20:50 +0200 | [diff] [blame] | 1410 | *count = 0; |
| 1411 | } else { |
| 1412 | nr_io_queues = min(result & 0xffff, result >> 16) + 1; |
| 1413 | *count = min(*count, nr_io_queues); |
| 1414 | } |
| 1415 | |
Christoph Hellwig | 9a0be7a | 2015-11-26 11:09:06 +0100 | [diff] [blame] | 1416 | return 0; |
| 1417 | } |
Ming Lin | 576d55d | 2016-02-10 10:03:32 -0800 | [diff] [blame] | 1418 | EXPORT_SYMBOL_GPL(nvme_set_queue_count); |
Christoph Hellwig | 9a0be7a | 2015-11-26 11:09:06 +0100 | [diff] [blame] | 1419 | |
Hannes Reinecke | c0561f8 | 2018-05-22 11:09:55 +0200 | [diff] [blame] | 1420 | #define NVME_AEN_SUPPORTED \ |
Sagi Grimberg | 85f8a43 | 2019-07-12 11:02:10 -0700 | [diff] [blame] | 1421 | (NVME_AEN_CFG_NS_ATTR | NVME_AEN_CFG_FW_ACT | \ |
| 1422 | NVME_AEN_CFG_ANA_CHANGE | NVME_AEN_CFG_DISC_CHANGE) |
Hannes Reinecke | c0561f8 | 2018-05-22 11:09:55 +0200 | [diff] [blame] | 1423 | |
| 1424 | static void nvme_enable_aen(struct nvme_ctrl *ctrl) |
| 1425 | { |
Weiping Zhang | fa441b7 | 2018-07-03 00:34:38 +0800 | [diff] [blame] | 1426 | u32 result, supported_aens = ctrl->oaes & NVME_AEN_SUPPORTED; |
Hannes Reinecke | c0561f8 | 2018-05-22 11:09:55 +0200 | [diff] [blame] | 1427 | int status; |
| 1428 | |
Weiping Zhang | fa441b7 | 2018-07-03 00:34:38 +0800 | [diff] [blame] | 1429 | if (!supported_aens) |
| 1430 | return; |
| 1431 | |
| 1432 | status = nvme_set_features(ctrl, NVME_FEAT_ASYNC_EVENT, supported_aens, |
| 1433 | NULL, 0, &result); |
Hannes Reinecke | c0561f8 | 2018-05-22 11:09:55 +0200 | [diff] [blame] | 1434 | if (status) |
| 1435 | dev_warn(ctrl->device, "Failed to configure AEN (cfg %x)\n", |
Weiping Zhang | fa441b7 | 2018-07-03 00:34:38 +0800 | [diff] [blame] | 1436 | supported_aens); |
Sagi Grimberg | 93da402 | 2019-08-22 11:25:46 -0700 | [diff] [blame] | 1437 | |
| 1438 | queue_work(nvme_wq, &ctrl->async_event_work); |
Hannes Reinecke | c0561f8 | 2018-05-22 11:09:55 +0200 | [diff] [blame] | 1439 | } |
| 1440 | |
Nick Bowler | c95b708 | 2020-03-28 01:09:09 -0400 | [diff] [blame] | 1441 | /* |
| 1442 | * Convert integer values from ioctl structures to user pointers, silently |
| 1443 | * ignoring the upper bits in the compat case to match behaviour of 32-bit |
| 1444 | * kernels. |
| 1445 | */ |
| 1446 | static void __user *nvme_to_user_ptr(uintptr_t ptrval) |
| 1447 | { |
| 1448 | if (in_compat_syscall()) |
| 1449 | ptrval = (compat_uptr_t)ptrval; |
| 1450 | return (void __user *)ptrval; |
| 1451 | } |
| 1452 | |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 1453 | static int nvme_submit_io(struct nvme_ns *ns, struct nvme_user_io __user *uio) |
| 1454 | { |
| 1455 | struct nvme_user_io io; |
| 1456 | struct nvme_command c; |
| 1457 | unsigned length, meta_len; |
| 1458 | void __user *metadata; |
| 1459 | |
| 1460 | if (copy_from_user(&io, uio, sizeof(io))) |
| 1461 | return -EFAULT; |
Keith Busch | 63088ec | 2016-02-24 09:15:57 -0700 | [diff] [blame] | 1462 | if (io.flags) |
| 1463 | return -EINVAL; |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 1464 | |
| 1465 | switch (io.opcode) { |
| 1466 | case nvme_cmd_write: |
| 1467 | case nvme_cmd_read: |
| 1468 | case nvme_cmd_compare: |
| 1469 | break; |
| 1470 | default: |
| 1471 | return -EINVAL; |
| 1472 | } |
| 1473 | |
| 1474 | length = (io.nblocks + 1) << ns->lba_shift; |
| 1475 | meta_len = (io.nblocks + 1) * ns->ms; |
Nick Bowler | c95b708 | 2020-03-28 01:09:09 -0400 | [diff] [blame] | 1476 | metadata = nvme_to_user_ptr(io.metadata); |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 1477 | |
Max Gurtovoy | ffc89b1d | 2020-05-19 17:05:49 +0300 | [diff] [blame] | 1478 | if (ns->features & NVME_NS_EXT_LBAS) { |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 1479 | length += meta_len; |
| 1480 | meta_len = 0; |
| 1481 | } else if (meta_len) { |
| 1482 | if ((io.metadata & 3) || !io.metadata) |
| 1483 | return -EINVAL; |
| 1484 | } |
| 1485 | |
| 1486 | memset(&c, 0, sizeof(c)); |
| 1487 | c.rw.opcode = io.opcode; |
| 1488 | c.rw.flags = io.flags; |
Christoph Hellwig | ed754e5 | 2017-11-09 13:50:43 +0100 | [diff] [blame] | 1489 | c.rw.nsid = cpu_to_le32(ns->head->ns_id); |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 1490 | c.rw.slba = cpu_to_le64(io.slba); |
| 1491 | c.rw.length = cpu_to_le16(io.nblocks); |
| 1492 | c.rw.control = cpu_to_le16(io.control); |
| 1493 | c.rw.dsmgmt = cpu_to_le32(io.dsmgmt); |
| 1494 | c.rw.reftag = cpu_to_le32(io.reftag); |
| 1495 | c.rw.apptag = cpu_to_le16(io.apptag); |
| 1496 | c.rw.appmask = cpu_to_le16(io.appmask); |
| 1497 | |
Keith Busch | 63263d6 | 2017-08-29 17:46:04 -0400 | [diff] [blame] | 1498 | return nvme_submit_user_cmd(ns->queue, &c, |
Nick Bowler | c95b708 | 2020-03-28 01:09:09 -0400 | [diff] [blame] | 1499 | nvme_to_user_ptr(io.addr), length, |
Bart Van Assche | 202359c | 2018-10-10 08:08:19 -0700 | [diff] [blame] | 1500 | metadata, meta_len, lower_32_bits(io.slba), NULL, 0); |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 1501 | } |
| 1502 | |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 1503 | static int nvme_user_cmd(struct nvme_ctrl *ctrl, struct nvme_ns *ns, |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 1504 | struct nvme_passthru_cmd __user *ucmd) |
| 1505 | { |
| 1506 | struct nvme_passthru_cmd cmd; |
| 1507 | struct nvme_command c; |
| 1508 | unsigned timeout = 0; |
Marta Rybczynska | 65e68ed | 2019-09-24 15:14:52 +0200 | [diff] [blame] | 1509 | u64 result; |
| 1510 | int status; |
| 1511 | |
| 1512 | if (!capable(CAP_SYS_ADMIN)) |
| 1513 | return -EACCES; |
| 1514 | if (copy_from_user(&cmd, ucmd, sizeof(cmd))) |
| 1515 | return -EFAULT; |
| 1516 | if (cmd.flags) |
| 1517 | return -EINVAL; |
| 1518 | |
| 1519 | memset(&c, 0, sizeof(c)); |
| 1520 | c.common.opcode = cmd.opcode; |
| 1521 | c.common.flags = cmd.flags; |
| 1522 | c.common.nsid = cpu_to_le32(cmd.nsid); |
| 1523 | c.common.cdw2[0] = cpu_to_le32(cmd.cdw2); |
| 1524 | c.common.cdw2[1] = cpu_to_le32(cmd.cdw3); |
| 1525 | c.common.cdw10 = cpu_to_le32(cmd.cdw10); |
| 1526 | c.common.cdw11 = cpu_to_le32(cmd.cdw11); |
| 1527 | c.common.cdw12 = cpu_to_le32(cmd.cdw12); |
| 1528 | c.common.cdw13 = cpu_to_le32(cmd.cdw13); |
| 1529 | c.common.cdw14 = cpu_to_le32(cmd.cdw14); |
| 1530 | c.common.cdw15 = cpu_to_le32(cmd.cdw15); |
| 1531 | |
| 1532 | if (cmd.timeout_ms) |
| 1533 | timeout = msecs_to_jiffies(cmd.timeout_ms); |
| 1534 | |
Marta Rybczynska | 65e68ed | 2019-09-24 15:14:52 +0200 | [diff] [blame] | 1535 | status = nvme_submit_user_cmd(ns ? ns->queue : ctrl->admin_q, &c, |
Nick Bowler | c95b708 | 2020-03-28 01:09:09 -0400 | [diff] [blame] | 1536 | nvme_to_user_ptr(cmd.addr), cmd.data_len, |
| 1537 | nvme_to_user_ptr(cmd.metadata), cmd.metadata_len, |
| 1538 | 0, &result, timeout); |
Marta Rybczynska | 65e68ed | 2019-09-24 15:14:52 +0200 | [diff] [blame] | 1539 | |
| 1540 | if (status >= 0) { |
| 1541 | if (put_user(result, &ucmd->result)) |
| 1542 | return -EFAULT; |
| 1543 | } |
| 1544 | |
| 1545 | return status; |
| 1546 | } |
| 1547 | |
| 1548 | static int nvme_user_cmd64(struct nvme_ctrl *ctrl, struct nvme_ns *ns, |
| 1549 | struct nvme_passthru_cmd64 __user *ucmd) |
| 1550 | { |
| 1551 | struct nvme_passthru_cmd64 cmd; |
| 1552 | struct nvme_command c; |
| 1553 | unsigned timeout = 0; |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 1554 | int status; |
| 1555 | |
| 1556 | if (!capable(CAP_SYS_ADMIN)) |
| 1557 | return -EACCES; |
| 1558 | if (copy_from_user(&cmd, ucmd, sizeof(cmd))) |
| 1559 | return -EFAULT; |
Keith Busch | 63088ec | 2016-02-24 09:15:57 -0700 | [diff] [blame] | 1560 | if (cmd.flags) |
| 1561 | return -EINVAL; |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 1562 | |
| 1563 | memset(&c, 0, sizeof(c)); |
| 1564 | c.common.opcode = cmd.opcode; |
| 1565 | c.common.flags = cmd.flags; |
| 1566 | c.common.nsid = cpu_to_le32(cmd.nsid); |
| 1567 | c.common.cdw2[0] = cpu_to_le32(cmd.cdw2); |
| 1568 | c.common.cdw2[1] = cpu_to_le32(cmd.cdw3); |
Chaitanya Kulkarni | b7c8f36 | 2018-12-12 15:11:37 -0800 | [diff] [blame] | 1569 | c.common.cdw10 = cpu_to_le32(cmd.cdw10); |
| 1570 | c.common.cdw11 = cpu_to_le32(cmd.cdw11); |
| 1571 | c.common.cdw12 = cpu_to_le32(cmd.cdw12); |
| 1572 | c.common.cdw13 = cpu_to_le32(cmd.cdw13); |
| 1573 | c.common.cdw14 = cpu_to_le32(cmd.cdw14); |
| 1574 | c.common.cdw15 = cpu_to_le32(cmd.cdw15); |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 1575 | |
| 1576 | if (cmd.timeout_ms) |
| 1577 | timeout = msecs_to_jiffies(cmd.timeout_ms); |
| 1578 | |
| 1579 | status = nvme_submit_user_cmd(ns ? ns->queue : ctrl->admin_q, &c, |
Nick Bowler | c95b708 | 2020-03-28 01:09:09 -0400 | [diff] [blame] | 1580 | nvme_to_user_ptr(cmd.addr), cmd.data_len, |
| 1581 | nvme_to_user_ptr(cmd.metadata), cmd.metadata_len, |
Keith Busch | 63263d6 | 2017-08-29 17:46:04 -0400 | [diff] [blame] | 1582 | 0, &cmd.result, timeout); |
Keith Busch | 84fef62 | 2017-11-07 10:28:32 -0700 | [diff] [blame] | 1583 | |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 1584 | if (status >= 0) { |
| 1585 | if (put_user(cmd.result, &ucmd->result)) |
| 1586 | return -EFAULT; |
| 1587 | } |
| 1588 | |
| 1589 | return status; |
| 1590 | } |
| 1591 | |
Christoph Hellwig | 32acab3 | 2017-11-02 12:59:30 +0100 | [diff] [blame] | 1592 | /* |
| 1593 | * Issue ioctl requests on the first available path. Note that unlike normal |
| 1594 | * block layer requests we will not retry failed request on another controller. |
| 1595 | */ |
Keith Busch | 240e6ee | 2020-06-29 12:06:41 -0700 | [diff] [blame] | 1596 | struct nvme_ns *nvme_get_ns_from_disk(struct gendisk *disk, |
Christoph Hellwig | 32acab3 | 2017-11-02 12:59:30 +0100 | [diff] [blame] | 1597 | struct nvme_ns_head **head, int *srcu_idx) |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 1598 | { |
Christoph Hellwig | 32acab3 | 2017-11-02 12:59:30 +0100 | [diff] [blame] | 1599 | #ifdef CONFIG_NVME_MULTIPATH |
| 1600 | if (disk->fops == &nvme_ns_head_ops) { |
Christoph Hellwig | 100c815 | 2019-05-17 02:47:33 -0700 | [diff] [blame] | 1601 | struct nvme_ns *ns; |
| 1602 | |
Christoph Hellwig | 32acab3 | 2017-11-02 12:59:30 +0100 | [diff] [blame] | 1603 | *head = disk->private_data; |
| 1604 | *srcu_idx = srcu_read_lock(&(*head)->srcu); |
Christoph Hellwig | 100c815 | 2019-05-17 02:47:33 -0700 | [diff] [blame] | 1605 | ns = nvme_find_path(*head); |
| 1606 | if (!ns) |
| 1607 | srcu_read_unlock(&(*head)->srcu, *srcu_idx); |
| 1608 | return ns; |
Christoph Hellwig | 32acab3 | 2017-11-02 12:59:30 +0100 | [diff] [blame] | 1609 | } |
| 1610 | #endif |
| 1611 | *head = NULL; |
| 1612 | *srcu_idx = -1; |
| 1613 | return disk->private_data; |
| 1614 | } |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 1615 | |
Keith Busch | 240e6ee | 2020-06-29 12:06:41 -0700 | [diff] [blame] | 1616 | void nvme_put_ns_from_disk(struct nvme_ns_head *head, int idx) |
Christoph Hellwig | 32acab3 | 2017-11-02 12:59:30 +0100 | [diff] [blame] | 1617 | { |
| 1618 | if (head) |
| 1619 | srcu_read_unlock(&head->srcu, idx); |
| 1620 | } |
| 1621 | |
Marta Rybczynska | 65e68ed | 2019-09-24 15:14:52 +0200 | [diff] [blame] | 1622 | static bool is_ctrl_ioctl(unsigned int cmd) |
| 1623 | { |
| 1624 | if (cmd == NVME_IOCTL_ADMIN_CMD || cmd == NVME_IOCTL_ADMIN64_CMD) |
| 1625 | return true; |
| 1626 | if (is_sed_ioctl(cmd)) |
| 1627 | return true; |
| 1628 | return false; |
| 1629 | } |
| 1630 | |
| 1631 | static int nvme_handle_ctrl_ioctl(struct nvme_ns *ns, unsigned int cmd, |
| 1632 | void __user *argp, |
| 1633 | struct nvme_ns_head *head, |
| 1634 | int srcu_idx) |
| 1635 | { |
| 1636 | struct nvme_ctrl *ctrl = ns->ctrl; |
| 1637 | int ret; |
| 1638 | |
| 1639 | nvme_get_ctrl(ns->ctrl); |
| 1640 | nvme_put_ns_from_disk(head, srcu_idx); |
| 1641 | |
| 1642 | switch (cmd) { |
| 1643 | case NVME_IOCTL_ADMIN_CMD: |
| 1644 | ret = nvme_user_cmd(ctrl, NULL, argp); |
| 1645 | break; |
| 1646 | case NVME_IOCTL_ADMIN64_CMD: |
| 1647 | ret = nvme_user_cmd64(ctrl, NULL, argp); |
| 1648 | break; |
| 1649 | default: |
| 1650 | ret = sed_ioctl(ctrl->opal_dev, cmd, argp); |
| 1651 | break; |
| 1652 | } |
| 1653 | nvme_put_ctrl(ctrl); |
| 1654 | return ret; |
| 1655 | } |
| 1656 | |
Christoph Hellwig | 32acab3 | 2017-11-02 12:59:30 +0100 | [diff] [blame] | 1657 | static int nvme_ioctl(struct block_device *bdev, fmode_t mode, |
| 1658 | unsigned int cmd, unsigned long arg) |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 1659 | { |
Christoph Hellwig | 32acab3 | 2017-11-02 12:59:30 +0100 | [diff] [blame] | 1660 | struct nvme_ns_head *head = NULL; |
Christoph Hellwig | 90ec611 | 2019-05-17 02:47:35 -0700 | [diff] [blame] | 1661 | void __user *argp = (void __user *)arg; |
Christoph Hellwig | 32acab3 | 2017-11-02 12:59:30 +0100 | [diff] [blame] | 1662 | struct nvme_ns *ns; |
| 1663 | int srcu_idx, ret; |
| 1664 | |
| 1665 | ns = nvme_get_ns_from_disk(bdev->bd_disk, &head, &srcu_idx); |
| 1666 | if (unlikely(!ns)) |
Christoph Hellwig | 100c815 | 2019-05-17 02:47:33 -0700 | [diff] [blame] | 1667 | return -EWOULDBLOCK; |
| 1668 | |
Christoph Hellwig | 5fb4aac | 2019-05-17 11:47:36 +0200 | [diff] [blame] | 1669 | /* |
| 1670 | * Handle ioctls that apply to the controller instead of the namespace |
| 1671 | * seperately and drop the ns SRCU reference early. This avoids a |
| 1672 | * deadlock when deleting namespaces using the passthrough interface. |
| 1673 | */ |
Marta Rybczynska | 65e68ed | 2019-09-24 15:14:52 +0200 | [diff] [blame] | 1674 | if (is_ctrl_ioctl(cmd)) |
| 1675 | return nvme_handle_ctrl_ioctl(ns, cmd, argp, head, srcu_idx); |
Christoph Hellwig | 5fb4aac | 2019-05-17 11:47:36 +0200 | [diff] [blame] | 1676 | |
Christoph Hellwig | 90ec611 | 2019-05-17 02:47:35 -0700 | [diff] [blame] | 1677 | switch (cmd) { |
| 1678 | case NVME_IOCTL_ID: |
| 1679 | force_successful_syscall_return(); |
| 1680 | ret = ns->head->ns_id; |
| 1681 | break; |
Christoph Hellwig | 90ec611 | 2019-05-17 02:47:35 -0700 | [diff] [blame] | 1682 | case NVME_IOCTL_IO_CMD: |
| 1683 | ret = nvme_user_cmd(ns->ctrl, ns, argp); |
| 1684 | break; |
| 1685 | case NVME_IOCTL_SUBMIT_IO: |
| 1686 | ret = nvme_submit_io(ns, argp); |
| 1687 | break; |
Marta Rybczynska | 65e68ed | 2019-09-24 15:14:52 +0200 | [diff] [blame] | 1688 | case NVME_IOCTL_IO64_CMD: |
| 1689 | ret = nvme_user_cmd64(ns->ctrl, ns, argp); |
| 1690 | break; |
Christoph Hellwig | 90ec611 | 2019-05-17 02:47:35 -0700 | [diff] [blame] | 1691 | default: |
| 1692 | if (ns->ndev) |
| 1693 | ret = nvme_nvm_ioctl(ns, cmd, arg); |
Christoph Hellwig | 90ec611 | 2019-05-17 02:47:35 -0700 | [diff] [blame] | 1694 | else |
| 1695 | ret = -ENOTTY; |
| 1696 | } |
| 1697 | |
Christoph Hellwig | 32acab3 | 2017-11-02 12:59:30 +0100 | [diff] [blame] | 1698 | nvme_put_ns_from_disk(head, srcu_idx); |
| 1699 | return ret; |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 1700 | } |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 1701 | |
masahiro31.yamada@kioxia.com | c225b61 | 2020-03-05 11:13:29 +0000 | [diff] [blame] | 1702 | #ifdef CONFIG_COMPAT |
| 1703 | struct nvme_user_io32 { |
| 1704 | __u8 opcode; |
| 1705 | __u8 flags; |
| 1706 | __u16 control; |
| 1707 | __u16 nblocks; |
| 1708 | __u16 rsvd; |
| 1709 | __u64 metadata; |
| 1710 | __u64 addr; |
| 1711 | __u64 slba; |
| 1712 | __u32 dsmgmt; |
| 1713 | __u32 reftag; |
| 1714 | __u16 apptag; |
| 1715 | __u16 appmask; |
| 1716 | } __attribute__((__packed__)); |
| 1717 | |
| 1718 | #define NVME_IOCTL_SUBMIT_IO32 _IOW('N', 0x42, struct nvme_user_io32) |
| 1719 | |
| 1720 | static int nvme_compat_ioctl(struct block_device *bdev, fmode_t mode, |
| 1721 | unsigned int cmd, unsigned long arg) |
| 1722 | { |
| 1723 | /* |
| 1724 | * Corresponds to the difference of NVME_IOCTL_SUBMIT_IO |
| 1725 | * between 32 bit programs and 64 bit kernel. |
| 1726 | * The cause is that the results of sizeof(struct nvme_user_io), |
| 1727 | * which is used to define NVME_IOCTL_SUBMIT_IO, |
| 1728 | * are not same between 32 bit compiler and 64 bit compiler. |
| 1729 | * NVME_IOCTL_SUBMIT_IO32 is for 64 bit kernel handling |
| 1730 | * NVME_IOCTL_SUBMIT_IO issued from 32 bit programs. |
| 1731 | * Other IOCTL numbers are same between 32 bit and 64 bit. |
| 1732 | * So there is nothing to do regarding to other IOCTL numbers. |
| 1733 | */ |
| 1734 | if (cmd == NVME_IOCTL_SUBMIT_IO32) |
| 1735 | return nvme_ioctl(bdev, mode, NVME_IOCTL_SUBMIT_IO, arg); |
| 1736 | |
| 1737 | return nvme_ioctl(bdev, mode, cmd, arg); |
| 1738 | } |
| 1739 | #else |
| 1740 | #define nvme_compat_ioctl NULL |
| 1741 | #endif /* CONFIG_COMPAT */ |
| 1742 | |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 1743 | static int nvme_open(struct block_device *bdev, fmode_t mode) |
| 1744 | { |
Christoph Hellwig | c6424a9 | 2017-10-18 13:22:00 +0200 | [diff] [blame] | 1745 | struct nvme_ns *ns = bdev->bd_disk->private_data; |
| 1746 | |
Christoph Hellwig | 32acab3 | 2017-11-02 12:59:30 +0100 | [diff] [blame] | 1747 | #ifdef CONFIG_NVME_MULTIPATH |
| 1748 | /* should never be called due to GENHD_FL_HIDDEN */ |
| 1749 | if (WARN_ON_ONCE(ns->head->disk)) |
Nitzan Carmi | 85088c4 | 2018-01-04 17:56:13 +0200 | [diff] [blame] | 1750 | goto fail; |
Christoph Hellwig | 32acab3 | 2017-11-02 12:59:30 +0100 | [diff] [blame] | 1751 | #endif |
Christoph Hellwig | c6424a9 | 2017-10-18 13:22:00 +0200 | [diff] [blame] | 1752 | if (!kref_get_unless_zero(&ns->kref)) |
Nitzan Carmi | 85088c4 | 2018-01-04 17:56:13 +0200 | [diff] [blame] | 1753 | goto fail; |
| 1754 | if (!try_module_get(ns->ctrl->ops->module)) |
| 1755 | goto fail_put_ns; |
| 1756 | |
Christoph Hellwig | c6424a9 | 2017-10-18 13:22:00 +0200 | [diff] [blame] | 1757 | return 0; |
Nitzan Carmi | 85088c4 | 2018-01-04 17:56:13 +0200 | [diff] [blame] | 1758 | |
| 1759 | fail_put_ns: |
| 1760 | nvme_put_ns(ns); |
| 1761 | fail: |
| 1762 | return -ENXIO; |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 1763 | } |
| 1764 | |
| 1765 | static void nvme_release(struct gendisk *disk, fmode_t mode) |
| 1766 | { |
Nitzan Carmi | 85088c4 | 2018-01-04 17:56:13 +0200 | [diff] [blame] | 1767 | struct nvme_ns *ns = disk->private_data; |
| 1768 | |
| 1769 | module_put(ns->ctrl->ops->module); |
| 1770 | nvme_put_ns(ns); |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 1771 | } |
| 1772 | |
| 1773 | static int nvme_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
| 1774 | { |
| 1775 | /* some standard values */ |
| 1776 | geo->heads = 1 << 6; |
| 1777 | geo->sectors = 1 << 5; |
| 1778 | geo->cylinders = get_capacity(bdev->bd_disk) >> 11; |
| 1779 | return 0; |
| 1780 | } |
| 1781 | |
| 1782 | #ifdef CONFIG_BLK_DEV_INTEGRITY |
Max Gurtovoy | 9509335 | 2020-05-19 17:05:52 +0300 | [diff] [blame] | 1783 | static void nvme_init_integrity(struct gendisk *disk, u16 ms, u8 pi_type, |
| 1784 | u32 max_integrity_segments) |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 1785 | { |
| 1786 | struct blk_integrity integrity; |
| 1787 | |
Jay Freyensee | fa9a89f | 2016-07-20 21:26:16 -0600 | [diff] [blame] | 1788 | memset(&integrity, 0, sizeof(integrity)); |
Christoph Hellwig | 39b7baa | 2017-11-02 21:28:53 +0300 | [diff] [blame] | 1789 | switch (pi_type) { |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 1790 | case NVME_NS_DPS_PI_TYPE3: |
| 1791 | integrity.profile = &t10_pi_type3_crc; |
Nicholas Bellinger | ba36c21 | 2016-04-09 03:04:42 +0000 | [diff] [blame] | 1792 | integrity.tag_size = sizeof(u16) + sizeof(u32); |
| 1793 | integrity.flags |= BLK_INTEGRITY_DEVICE_CAPABLE; |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 1794 | break; |
| 1795 | case NVME_NS_DPS_PI_TYPE1: |
| 1796 | case NVME_NS_DPS_PI_TYPE2: |
| 1797 | integrity.profile = &t10_pi_type1_crc; |
Nicholas Bellinger | ba36c21 | 2016-04-09 03:04:42 +0000 | [diff] [blame] | 1798 | integrity.tag_size = sizeof(u16); |
| 1799 | integrity.flags |= BLK_INTEGRITY_DEVICE_CAPABLE; |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 1800 | break; |
| 1801 | default: |
| 1802 | integrity.profile = NULL; |
| 1803 | break; |
| 1804 | } |
Christoph Hellwig | 39b7baa | 2017-11-02 21:28:53 +0300 | [diff] [blame] | 1805 | integrity.tuple_size = ms; |
| 1806 | blk_integrity_register(disk, &integrity); |
Max Gurtovoy | 9509335 | 2020-05-19 17:05:52 +0300 | [diff] [blame] | 1807 | blk_queue_max_integrity_segments(disk->queue, max_integrity_segments); |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 1808 | } |
| 1809 | #else |
Max Gurtovoy | 9509335 | 2020-05-19 17:05:52 +0300 | [diff] [blame] | 1810 | static void nvme_init_integrity(struct gendisk *disk, u16 ms, u8 pi_type, |
| 1811 | u32 max_integrity_segments) |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 1812 | { |
| 1813 | } |
| 1814 | #endif /* CONFIG_BLK_DEV_INTEGRITY */ |
| 1815 | |
Christoph Hellwig | 26318571 | 2019-03-13 18:55:07 +0100 | [diff] [blame] | 1816 | static void nvme_config_discard(struct gendisk *disk, struct nvme_ns *ns) |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 1817 | { |
Jens Axboe | 3831761 | 2018-05-02 11:06:54 -0600 | [diff] [blame] | 1818 | struct nvme_ctrl *ctrl = ns->ctrl; |
Christoph Hellwig | 26318571 | 2019-03-13 18:55:07 +0100 | [diff] [blame] | 1819 | struct request_queue *queue = disk->queue; |
Christoph Hellwig | 30e5e92 | 2017-11-02 21:28:54 +0300 | [diff] [blame] | 1820 | u32 size = queue_logical_block_size(queue); |
| 1821 | |
Jens Axboe | 3831761 | 2018-05-02 11:06:54 -0600 | [diff] [blame] | 1822 | if (!(ctrl->oncs & NVME_CTRL_ONCS_DSM)) { |
| 1823 | blk_queue_flag_clear(QUEUE_FLAG_DISCARD, queue); |
| 1824 | return; |
| 1825 | } |
| 1826 | |
| 1827 | if (ctrl->nr_streams && ns->sws && ns->sgs) |
| 1828 | size *= ns->sws * ns->sgs; |
Keith Busch | 08095e7 | 2016-03-04 13:15:17 -0700 | [diff] [blame] | 1829 | |
Christoph Hellwig | b35ba01 | 2017-02-08 14:46:50 +0100 | [diff] [blame] | 1830 | BUILD_BUG_ON(PAGE_SIZE / sizeof(struct nvme_dsm_range) < |
| 1831 | NVME_DSM_MAX_RANGES); |
| 1832 | |
David Disseldorp | b224f61 | 2017-11-24 16:30:53 +0100 | [diff] [blame] | 1833 | queue->limits.discard_alignment = 0; |
Christoph Hellwig | 30e5e92 | 2017-11-02 21:28:54 +0300 | [diff] [blame] | 1834 | queue->limits.discard_granularity = size; |
Jens Axboe | f5d1184 | 2017-06-27 12:03:06 -0600 | [diff] [blame] | 1835 | |
Jens Axboe | 3831761 | 2018-05-02 11:06:54 -0600 | [diff] [blame] | 1836 | /* If discard is already enabled, don't reset queue limits */ |
| 1837 | if (blk_queue_flag_test_and_set(QUEUE_FLAG_DISCARD, queue)) |
| 1838 | return; |
| 1839 | |
Christoph Hellwig | 30e5e92 | 2017-11-02 21:28:54 +0300 | [diff] [blame] | 1840 | blk_queue_max_discard_sectors(queue, UINT_MAX); |
| 1841 | blk_queue_max_discard_segments(queue, NVME_DSM_MAX_RANGES); |
Christoph Hellwig | e850fd1 | 2017-04-05 19:21:13 +0200 | [diff] [blame] | 1842 | |
| 1843 | if (ctrl->quirks & NVME_QUIRK_DEALLOCATE_ZEROES) |
Christoph Hellwig | 30e5e92 | 2017-11-02 21:28:54 +0300 | [diff] [blame] | 1844 | blk_queue_max_write_zeroes_sectors(queue, UINT_MAX); |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 1845 | } |
| 1846 | |
Christoph Hellwig | 9f0916a | 2019-03-13 18:55:08 +0100 | [diff] [blame] | 1847 | static void nvme_config_write_zeroes(struct gendisk *disk, struct nvme_ns *ns) |
Chaitanya Kulkarni | 6e02318 | 2018-12-17 22:42:03 -0500 | [diff] [blame] | 1848 | { |
Damien Le Moal | e08f2ae | 2019-10-21 12:40:04 +0900 | [diff] [blame] | 1849 | u64 max_blocks; |
Chaitanya Kulkarni | 6e02318 | 2018-12-17 22:42:03 -0500 | [diff] [blame] | 1850 | |
Christoph Hellwig | 7b210e4 | 2019-03-13 18:55:05 +0100 | [diff] [blame] | 1851 | if (!(ns->ctrl->oncs & NVME_CTRL_ONCS_WRITE_ZEROES) || |
| 1852 | (ns->ctrl->quirks & NVME_QUIRK_DISABLE_WRITE_ZEROES)) |
Chaitanya Kulkarni | 6e02318 | 2018-12-17 22:42:03 -0500 | [diff] [blame] | 1853 | return; |
| 1854 | /* |
| 1855 | * Even though NVMe spec explicitly states that MDTS is not |
| 1856 | * applicable to the write-zeroes:- "The restriction does not apply to |
| 1857 | * commands that do not transfer data between the host and the |
| 1858 | * controller (e.g., Write Uncorrectable ro Write Zeroes command).". |
| 1859 | * In order to be more cautious use controller's max_hw_sectors value |
| 1860 | * to configure the maximum sectors for the write-zeroes which is |
| 1861 | * configured based on the controller's MDTS field in the |
| 1862 | * nvme_init_identify() if available. |
| 1863 | */ |
| 1864 | if (ns->ctrl->max_hw_sectors == UINT_MAX) |
Damien Le Moal | e08f2ae | 2019-10-21 12:40:04 +0900 | [diff] [blame] | 1865 | max_blocks = (u64)USHRT_MAX + 1; |
Chaitanya Kulkarni | 6e02318 | 2018-12-17 22:42:03 -0500 | [diff] [blame] | 1866 | else |
Damien Le Moal | e08f2ae | 2019-10-21 12:40:04 +0900 | [diff] [blame] | 1867 | max_blocks = ns->ctrl->max_hw_sectors + 1; |
Chaitanya Kulkarni | 6e02318 | 2018-12-17 22:42:03 -0500 | [diff] [blame] | 1868 | |
Damien Le Moal | e08f2ae | 2019-10-21 12:40:04 +0900 | [diff] [blame] | 1869 | blk_queue_max_write_zeroes_sectors(disk->queue, |
| 1870 | nvme_lba_to_sect(ns, max_blocks)); |
Chaitanya Kulkarni | 6e02318 | 2018-12-17 22:42:03 -0500 | [diff] [blame] | 1871 | } |
| 1872 | |
Sagi Grimberg | 538af88 | 2019-08-02 18:16:12 -0700 | [diff] [blame] | 1873 | static int nvme_report_ns_ids(struct nvme_ctrl *ctrl, unsigned int nsid, |
Christoph Hellwig | 002fab0 | 2017-11-09 13:50:16 +0100 | [diff] [blame] | 1874 | struct nvme_id_ns *id, struct nvme_ns_ids *ids) |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 1875 | { |
Christoph Hellwig | 002fab0 | 2017-11-09 13:50:16 +0100 | [diff] [blame] | 1876 | memset(ids, 0, sizeof(*ids)); |
| 1877 | |
Christoph Hellwig | cdbff4f | 2017-08-16 16:14:47 +0200 | [diff] [blame] | 1878 | if (ctrl->vs >= NVME_VS(1, 1, 0)) |
Christoph Hellwig | 002fab0 | 2017-11-09 13:50:16 +0100 | [diff] [blame] | 1879 | memcpy(ids->eui64, id->eui64, sizeof(id->eui64)); |
Christoph Hellwig | cdbff4f | 2017-08-16 16:14:47 +0200 | [diff] [blame] | 1880 | if (ctrl->vs >= NVME_VS(1, 2, 0)) |
Christoph Hellwig | 002fab0 | 2017-11-09 13:50:16 +0100 | [diff] [blame] | 1881 | memcpy(ids->nguid, id->nguid, sizeof(id->nguid)); |
Niklas Cassel | 71010c3 | 2020-06-29 12:06:39 -0700 | [diff] [blame] | 1882 | if (ctrl->vs >= NVME_VS(1, 3, 0) || nvme_multi_css(ctrl)) |
Christoph Hellwig | fb314eb | 2020-03-25 14:19:35 +0100 | [diff] [blame] | 1883 | return nvme_identify_ns_descs(ctrl, nsid, ids); |
| 1884 | return 0; |
Matias Bjørling | ac81bfa9 | 2016-09-16 14:25:04 +0200 | [diff] [blame] | 1885 | } |
| 1886 | |
Christoph Hellwig | ed754e5 | 2017-11-09 13:50:43 +0100 | [diff] [blame] | 1887 | static bool nvme_ns_ids_valid(struct nvme_ns_ids *ids) |
| 1888 | { |
| 1889 | return !uuid_is_null(&ids->uuid) || |
| 1890 | memchr_inv(ids->nguid, 0, sizeof(ids->nguid)) || |
| 1891 | memchr_inv(ids->eui64, 0, sizeof(ids->eui64)); |
| 1892 | } |
| 1893 | |
Christoph Hellwig | 002fab0 | 2017-11-09 13:50:16 +0100 | [diff] [blame] | 1894 | static bool nvme_ns_ids_equal(struct nvme_ns_ids *a, struct nvme_ns_ids *b) |
| 1895 | { |
| 1896 | return uuid_equal(&a->uuid, &b->uuid) && |
| 1897 | memcmp(&a->nguid, &b->nguid, sizeof(a->nguid)) == 0 && |
Niklas Cassel | 71010c3 | 2020-06-29 12:06:39 -0700 | [diff] [blame] | 1898 | memcmp(&a->eui64, &b->eui64, sizeof(a->eui64)) == 0 && |
| 1899 | a->csi == b->csi; |
Christoph Hellwig | 002fab0 | 2017-11-09 13:50:16 +0100 | [diff] [blame] | 1900 | } |
| 1901 | |
Keith Busch | 31fdad7 | 2020-04-09 09:09:08 -0700 | [diff] [blame] | 1902 | static int nvme_setup_streams_ns(struct nvme_ctrl *ctrl, struct nvme_ns *ns, |
| 1903 | u32 *phys_bs, u32 *io_opt) |
Keith Busch | bc1af00 | 2020-04-09 09:09:07 -0700 | [diff] [blame] | 1904 | { |
| 1905 | struct streams_directive_params s; |
| 1906 | int ret; |
| 1907 | |
| 1908 | if (!ctrl->nr_streams) |
| 1909 | return 0; |
| 1910 | |
| 1911 | ret = nvme_get_stream_params(ctrl, &s, ns->head->ns_id); |
| 1912 | if (ret) |
| 1913 | return ret; |
| 1914 | |
| 1915 | ns->sws = le32_to_cpu(s.sws); |
| 1916 | ns->sgs = le16_to_cpu(s.sgs); |
| 1917 | |
| 1918 | if (ns->sws) { |
Keith Busch | 31fdad7 | 2020-04-09 09:09:08 -0700 | [diff] [blame] | 1919 | *phys_bs = ns->sws * (1 << ns->lba_shift); |
Keith Busch | bc1af00 | 2020-04-09 09:09:07 -0700 | [diff] [blame] | 1920 | if (ns->sgs) |
Keith Busch | 31fdad7 | 2020-04-09 09:09:08 -0700 | [diff] [blame] | 1921 | *io_opt = *phys_bs * ns->sgs; |
Keith Busch | bc1af00 | 2020-04-09 09:09:07 -0700 | [diff] [blame] | 1922 | } |
| 1923 | |
| 1924 | return 0; |
| 1925 | } |
| 1926 | |
Christoph Hellwig | 24b0b58 | 2017-11-02 21:28:56 +0300 | [diff] [blame] | 1927 | static void nvme_update_disk_info(struct gendisk *disk, |
| 1928 | struct nvme_ns *ns, struct nvme_id_ns *id) |
| 1929 | { |
Damien Le Moal | e08f2ae | 2019-10-21 12:40:04 +0900 | [diff] [blame] | 1930 | sector_t capacity = nvme_lba_to_sect(ns, le64_to_cpu(id->nsze)); |
Jeff Lien | cee160f | 2017-12-19 13:24:15 -0600 | [diff] [blame] | 1931 | unsigned short bs = 1 << ns->lba_shift; |
Damien Le Moal | 68ab60c | 2020-05-14 14:56:26 +0900 | [diff] [blame] | 1932 | u32 atomic_bs, phys_bs, io_opt = 0; |
Christoph Hellwig | 24b0b58 | 2017-11-02 21:28:56 +0300 | [diff] [blame] | 1933 | |
Sagi Grimberg | 01fa0174 | 2019-03-11 15:02:25 -0700 | [diff] [blame] | 1934 | if (ns->lba_shift > PAGE_SHIFT) { |
| 1935 | /* unsupported block size, set capacity to 0 later */ |
| 1936 | bs = (1 << 9); |
| 1937 | } |
Christoph Hellwig | 24b0b58 | 2017-11-02 21:28:56 +0300 | [diff] [blame] | 1938 | blk_mq_freeze_queue(disk->queue); |
| 1939 | blk_integrity_unregister(disk); |
| 1940 | |
Damien Le Moal | 68ab60c | 2020-05-14 14:56:26 +0900 | [diff] [blame] | 1941 | atomic_bs = phys_bs = bs; |
Keith Busch | 31fdad7 | 2020-04-09 09:09:08 -0700 | [diff] [blame] | 1942 | nvme_setup_streams_ns(ns->ctrl, ns, &phys_bs, &io_opt); |
Bart Van Assche | 81adb86 | 2019-06-28 09:53:31 -0700 | [diff] [blame] | 1943 | if (id->nabo == 0) { |
| 1944 | /* |
| 1945 | * Bit 1 indicates whether NAWUPF is defined for this namespace |
| 1946 | * and whether it should be used instead of AWUPF. If NAWUPF == |
| 1947 | * 0 then AWUPF must be used instead. |
| 1948 | */ |
Keith Busch | 92decf1 | 2020-04-03 10:53:46 -0700 | [diff] [blame] | 1949 | if (id->nsfeat & NVME_NS_FEAT_ATOMICS && id->nawupf) |
Bart Van Assche | 81adb86 | 2019-06-28 09:53:31 -0700 | [diff] [blame] | 1950 | atomic_bs = (1 + le16_to_cpu(id->nawupf)) * bs; |
| 1951 | else |
| 1952 | atomic_bs = (1 + ns->ctrl->subsys->awupf) * bs; |
Bart Van Assche | 81adb86 | 2019-06-28 09:53:31 -0700 | [diff] [blame] | 1953 | } |
Keith Busch | 31fdad7 | 2020-04-09 09:09:08 -0700 | [diff] [blame] | 1954 | |
Keith Busch | 92decf1 | 2020-04-03 10:53:46 -0700 | [diff] [blame] | 1955 | if (id->nsfeat & NVME_NS_FEAT_IO_OPT) { |
Bart Van Assche | 81adb86 | 2019-06-28 09:53:31 -0700 | [diff] [blame] | 1956 | /* NPWG = Namespace Preferred Write Granularity */ |
Keith Busch | 31fdad7 | 2020-04-09 09:09:08 -0700 | [diff] [blame] | 1957 | phys_bs = bs * (1 + le16_to_cpu(id->npwg)); |
Bart Van Assche | 81adb86 | 2019-06-28 09:53:31 -0700 | [diff] [blame] | 1958 | /* NOWS = Namespace Optimal Write Size */ |
Keith Busch | 31fdad7 | 2020-04-09 09:09:08 -0700 | [diff] [blame] | 1959 | io_opt = bs * (1 + le16_to_cpu(id->nows)); |
Bart Van Assche | 81adb86 | 2019-06-28 09:53:31 -0700 | [diff] [blame] | 1960 | } |
| 1961 | |
Jeff Lien | cee160f | 2017-12-19 13:24:15 -0600 | [diff] [blame] | 1962 | blk_queue_logical_block_size(disk->queue, bs); |
Bart Van Assche | 81adb86 | 2019-06-28 09:53:31 -0700 | [diff] [blame] | 1963 | /* |
| 1964 | * Linux filesystems assume writing a single physical block is |
| 1965 | * an atomic operation. Hence limit the physical block size to the |
| 1966 | * value of the Atomic Write Unit Power Fail parameter. |
| 1967 | */ |
| 1968 | blk_queue_physical_block_size(disk->queue, min(phys_bs, atomic_bs)); |
| 1969 | blk_queue_io_min(disk->queue, phys_bs); |
| 1970 | blk_queue_io_opt(disk->queue, io_opt); |
Jeff Lien | cee160f | 2017-12-19 13:24:15 -0600 | [diff] [blame] | 1971 | |
Max Gurtovoy | b29f848 | 2020-05-19 17:05:50 +0300 | [diff] [blame] | 1972 | /* |
| 1973 | * The block layer can't support LBA sizes larger than the page size |
| 1974 | * yet, so catch this early and don't allow block I/O. |
| 1975 | */ |
| 1976 | if (ns->lba_shift > PAGE_SHIFT) |
Christoph Hellwig | 24b0b58 | 2017-11-02 21:28:56 +0300 | [diff] [blame] | 1977 | capacity = 0; |
Christoph Hellwig | 24b0b58 | 2017-11-02 21:28:56 +0300 | [diff] [blame] | 1978 | |
Max Gurtovoy | b29f848 | 2020-05-19 17:05:50 +0300 | [diff] [blame] | 1979 | /* |
| 1980 | * Register a metadata profile for PI, or the plain non-integrity NVMe |
| 1981 | * metadata masquerading as Type 0 if supported, otherwise reject block |
| 1982 | * I/O to namespaces with metadata except when the namespace supports |
| 1983 | * PI, as it can strip/insert in that case. |
| 1984 | */ |
| 1985 | if (ns->ms) { |
| 1986 | if (IS_ENABLED(CONFIG_BLK_DEV_INTEGRITY) && |
| 1987 | (ns->features & NVME_NS_METADATA_SUPPORTED)) |
Max Gurtovoy | 9509335 | 2020-05-19 17:05:52 +0300 | [diff] [blame] | 1988 | nvme_init_integrity(disk, ns->ms, ns->pi_type, |
| 1989 | ns->ctrl->max_integrity_segments); |
Max Gurtovoy | b29f848 | 2020-05-19 17:05:50 +0300 | [diff] [blame] | 1990 | else if (!nvme_ns_has_pi(ns)) |
| 1991 | capacity = 0; |
| 1992 | } |
| 1993 | |
Balbir Singh | cb224c3 | 2020-03-13 05:30:08 +0000 | [diff] [blame] | 1994 | set_capacity_revalidate_and_notify(disk, capacity, false); |
Christoph Hellwig | b1aafb3 | 2019-03-13 18:55:06 +0100 | [diff] [blame] | 1995 | |
Christoph Hellwig | 26318571 | 2019-03-13 18:55:07 +0100 | [diff] [blame] | 1996 | nvme_config_discard(disk, ns); |
Christoph Hellwig | 9f0916a | 2019-03-13 18:55:08 +0100 | [diff] [blame] | 1997 | nvme_config_write_zeroes(disk, ns); |
Chaitanya Kulkarni | 1293477 | 2018-08-07 23:01:06 -0700 | [diff] [blame] | 1998 | |
Keith Busch | 92decf1 | 2020-04-03 10:53:46 -0700 | [diff] [blame] | 1999 | if (id->nsattr & NVME_NS_ATTR_RO) |
Chaitanya Kulkarni | 1293477 | 2018-08-07 23:01:06 -0700 | [diff] [blame] | 2000 | set_disk_ro(disk, true); |
| 2001 | else |
| 2002 | set_disk_ro(disk, false); |
| 2003 | |
Christoph Hellwig | 24b0b58 | 2017-11-02 21:28:56 +0300 | [diff] [blame] | 2004 | blk_mq_unfreeze_queue(disk->queue); |
| 2005 | } |
| 2006 | |
Max Gurtovoy | 33cfdc2 | 2020-05-19 17:05:53 +0300 | [diff] [blame] | 2007 | static int __nvme_revalidate_disk(struct gendisk *disk, struct nvme_id_ns *id) |
Matias Bjørling | ac81bfa9 | 2016-09-16 14:25:04 +0200 | [diff] [blame] | 2008 | { |
Keith Busch | 240e6ee | 2020-06-29 12:06:41 -0700 | [diff] [blame] | 2009 | unsigned lbaf = id->flbas & NVME_NS_FLBAS_LBA_MASK; |
Matias Bjørling | ac81bfa9 | 2016-09-16 14:25:04 +0200 | [diff] [blame] | 2010 | struct nvme_ns *ns = disk->private_data; |
Max Gurtovoy | 33cfdc2 | 2020-05-19 17:05:53 +0300 | [diff] [blame] | 2011 | struct nvme_ctrl *ctrl = ns->ctrl; |
Keith Busch | 240e6ee | 2020-06-29 12:06:41 -0700 | [diff] [blame] | 2012 | int ret; |
Keith Busch | 38adf94 | 2020-04-09 09:09:06 -0700 | [diff] [blame] | 2013 | u32 iob; |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 2014 | |
| 2015 | /* |
| 2016 | * If identify namespace failed, use default 512 byte block size so |
| 2017 | * block layer can use before failing read/write for 0 capacity. |
| 2018 | */ |
Keith Busch | 240e6ee | 2020-06-29 12:06:41 -0700 | [diff] [blame] | 2019 | ns->lba_shift = id->lbaf[lbaf].ds; |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 2020 | if (ns->lba_shift == 0) |
| 2021 | ns->lba_shift = 9; |
Keith Busch | 38adf94 | 2020-04-09 09:09:06 -0700 | [diff] [blame] | 2022 | |
Niklas Cassel | 71010c3 | 2020-06-29 12:06:39 -0700 | [diff] [blame] | 2023 | switch (ns->head->ids.csi) { |
| 2024 | case NVME_CSI_NVM: |
| 2025 | break; |
Keith Busch | 240e6ee | 2020-06-29 12:06:41 -0700 | [diff] [blame] | 2026 | case NVME_CSI_ZNS: |
| 2027 | ret = nvme_update_zone_info(disk, ns, lbaf); |
| 2028 | if (ret) { |
| 2029 | dev_warn(ctrl->device, |
| 2030 | "failed to add zoned namespace:%u ret:%d\n", |
| 2031 | ns->head->ns_id, ret); |
| 2032 | return ret; |
| 2033 | } |
| 2034 | break; |
Niklas Cassel | 71010c3 | 2020-06-29 12:06:39 -0700 | [diff] [blame] | 2035 | default: |
Keith Busch | 240e6ee | 2020-06-29 12:06:41 -0700 | [diff] [blame] | 2036 | dev_warn(ctrl->device, "unknown csi:%u ns:%u\n", |
Niklas Cassel | 71010c3 | 2020-06-29 12:06:39 -0700 | [diff] [blame] | 2037 | ns->head->ids.csi, ns->head->ns_id); |
| 2038 | return -ENODEV; |
| 2039 | } |
| 2040 | |
Max Gurtovoy | 33cfdc2 | 2020-05-19 17:05:53 +0300 | [diff] [blame] | 2041 | if ((ctrl->quirks & NVME_QUIRK_STRIPE_SIZE) && |
| 2042 | is_power_of_2(ctrl->max_hw_sectors)) |
| 2043 | iob = ctrl->max_hw_sectors; |
Keith Busch | 38adf94 | 2020-04-09 09:09:06 -0700 | [diff] [blame] | 2044 | else |
| 2045 | iob = nvme_lba_to_sect(ns, le16_to_cpu(id->noiob)); |
| 2046 | |
Max Gurtovoy | ffc89b1d | 2020-05-19 17:05:49 +0300 | [diff] [blame] | 2047 | ns->features = 0; |
Keith Busch | 240e6ee | 2020-06-29 12:06:41 -0700 | [diff] [blame] | 2048 | ns->ms = le16_to_cpu(id->lbaf[lbaf].ms); |
Christoph Hellwig | b5be3b3 | 2017-11-02 21:28:52 +0300 | [diff] [blame] | 2049 | /* the PI implementation requires metadata equal t10 pi tuple size */ |
| 2050 | if (ns->ms == sizeof(struct t10_pi_tuple)) |
| 2051 | ns->pi_type = id->dps & NVME_NS_DPS_PI_MASK; |
| 2052 | else |
| 2053 | ns->pi_type = 0; |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 2054 | |
Max Gurtovoy | b29f848 | 2020-05-19 17:05:50 +0300 | [diff] [blame] | 2055 | if (ns->ms) { |
Max Gurtovoy | b29f848 | 2020-05-19 17:05:50 +0300 | [diff] [blame] | 2056 | /* |
Max Gurtovoy | 33cfdc2 | 2020-05-19 17:05:53 +0300 | [diff] [blame] | 2057 | * For PCIe only the separate metadata pointer is supported, |
| 2058 | * as the block layer supplies metadata in a separate bio_vec |
| 2059 | * chain. For Fabrics, only metadata as part of extended data |
| 2060 | * LBA is supported on the wire per the Fabrics specification, |
| 2061 | * but the HBA/HCA will do the remapping from the separate |
| 2062 | * metadata buffers for us. |
Max Gurtovoy | b29f848 | 2020-05-19 17:05:50 +0300 | [diff] [blame] | 2063 | */ |
Max Gurtovoy | 33cfdc2 | 2020-05-19 17:05:53 +0300 | [diff] [blame] | 2064 | if (id->flbas & NVME_NS_FLBAS_META_EXT) { |
| 2065 | ns->features |= NVME_NS_EXT_LBAS; |
| 2066 | if ((ctrl->ops->flags & NVME_F_FABRICS) && |
| 2067 | (ctrl->ops->flags & NVME_F_METADATA_SUPPORTED) && |
| 2068 | ctrl->max_integrity_segments) |
| 2069 | ns->features |= NVME_NS_METADATA_SUPPORTED; |
| 2070 | } else { |
| 2071 | if (WARN_ON_ONCE(ctrl->ops->flags & NVME_F_FABRICS)) |
| 2072 | return -EINVAL; |
| 2073 | if (ctrl->ops->flags & NVME_F_METADATA_SUPPORTED) |
Max Gurtovoy | b29f848 | 2020-05-19 17:05:50 +0300 | [diff] [blame] | 2074 | ns->features |= NVME_NS_METADATA_SUPPORTED; |
| 2075 | } |
| 2076 | } |
| 2077 | |
Keith Busch | 38adf94 | 2020-04-09 09:09:06 -0700 | [diff] [blame] | 2078 | if (iob) |
| 2079 | blk_queue_chunk_sectors(ns->queue, rounddown_pow_of_two(iob)); |
Christoph Hellwig | 24b0b58 | 2017-11-02 21:28:56 +0300 | [diff] [blame] | 2080 | nvme_update_disk_info(disk, ns, id); |
Christoph Hellwig | 32acab3 | 2017-11-02 12:59:30 +0100 | [diff] [blame] | 2081 | #ifdef CONFIG_NVME_MULTIPATH |
Sagi Grimberg | 8f676b85 | 2018-11-02 11:22:13 -0700 | [diff] [blame] | 2082 | if (ns->head->disk) { |
Christoph Hellwig | 32acab3 | 2017-11-02 12:59:30 +0100 | [diff] [blame] | 2083 | nvme_update_disk_info(ns->head->disk, ns, id); |
Christoph Hellwig | b9b1a5d | 2020-07-20 08:12:51 +0200 | [diff] [blame] | 2084 | blk_stack_limits(&ns->head->disk->queue->limits, |
| 2085 | &ns->queue->limits, 0); |
Anthony Iliopoulos | 05b2902 | 2020-07-14 13:11:59 +0200 | [diff] [blame] | 2086 | nvme_mpath_update_disk_size(ns->head->disk); |
Sagi Grimberg | 8f676b85 | 2018-11-02 11:22:13 -0700 | [diff] [blame] | 2087 | } |
Christoph Hellwig | 32acab3 | 2017-11-02 12:59:30 +0100 | [diff] [blame] | 2088 | #endif |
Max Gurtovoy | 33cfdc2 | 2020-05-19 17:05:53 +0300 | [diff] [blame] | 2089 | return 0; |
Matias Bjørling | ac81bfa9 | 2016-09-16 14:25:04 +0200 | [diff] [blame] | 2090 | } |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 2091 | |
Keith Busch | 240e6ee | 2020-06-29 12:06:41 -0700 | [diff] [blame] | 2092 | static int _nvme_revalidate_disk(struct gendisk *disk) |
Matias Bjørling | ac81bfa9 | 2016-09-16 14:25:04 +0200 | [diff] [blame] | 2093 | { |
| 2094 | struct nvme_ns *ns = disk->private_data; |
Christoph Hellwig | cdbff4f | 2017-08-16 16:14:47 +0200 | [diff] [blame] | 2095 | struct nvme_ctrl *ctrl = ns->ctrl; |
| 2096 | struct nvme_id_ns *id; |
Christoph Hellwig | 002fab0 | 2017-11-09 13:50:16 +0100 | [diff] [blame] | 2097 | struct nvme_ns_ids ids; |
Christoph Hellwig | cdbff4f | 2017-08-16 16:14:47 +0200 | [diff] [blame] | 2098 | int ret = 0; |
Matias Bjørling | ac81bfa9 | 2016-09-16 14:25:04 +0200 | [diff] [blame] | 2099 | |
| 2100 | if (test_bit(NVME_NS_DEAD, &ns->flags)) { |
| 2101 | set_capacity(disk, 0); |
| 2102 | return -ENODEV; |
| 2103 | } |
| 2104 | |
Sagi Grimberg | 331813f | 2019-08-02 18:11:42 -0700 | [diff] [blame] | 2105 | ret = nvme_identify_ns(ctrl, ns->head->ns_id, &id); |
| 2106 | if (ret) |
| 2107 | goto out; |
Matias Bjørling | ac81bfa9 | 2016-09-16 14:25:04 +0200 | [diff] [blame] | 2108 | |
Christoph Hellwig | cdbff4f | 2017-08-16 16:14:47 +0200 | [diff] [blame] | 2109 | if (id->ncap == 0) { |
| 2110 | ret = -ENODEV; |
Sagi Grimberg | 331813f | 2019-08-02 18:11:42 -0700 | [diff] [blame] | 2111 | goto free_id; |
Christoph Hellwig | cdbff4f | 2017-08-16 16:14:47 +0200 | [diff] [blame] | 2112 | } |
| 2113 | |
Sagi Grimberg | 538af88 | 2019-08-02 18:16:12 -0700 | [diff] [blame] | 2114 | ret = nvme_report_ns_ids(ctrl, ns->head->ns_id, id, &ids); |
| 2115 | if (ret) |
| 2116 | goto free_id; |
| 2117 | |
Christoph Hellwig | ed754e5 | 2017-11-09 13:50:43 +0100 | [diff] [blame] | 2118 | if (!nvme_ns_ids_equal(&ns->head->ids, &ids)) { |
Christoph Hellwig | 1d5df6a | 2017-08-17 14:10:00 +0200 | [diff] [blame] | 2119 | dev_err(ctrl->device, |
Christoph Hellwig | ed754e5 | 2017-11-09 13:50:43 +0100 | [diff] [blame] | 2120 | "identifiers changed for nsid %d\n", ns->head->ns_id); |
Christoph Hellwig | 1d5df6a | 2017-08-17 14:10:00 +0200 | [diff] [blame] | 2121 | ret = -ENODEV; |
Keith Busch | b2b2de7 | 2020-04-09 09:09:05 -0700 | [diff] [blame] | 2122 | goto free_id; |
Christoph Hellwig | 1d5df6a | 2017-08-17 14:10:00 +0200 | [diff] [blame] | 2123 | } |
| 2124 | |
Max Gurtovoy | 33cfdc2 | 2020-05-19 17:05:53 +0300 | [diff] [blame] | 2125 | ret = __nvme_revalidate_disk(disk, id); |
Sagi Grimberg | 331813f | 2019-08-02 18:11:42 -0700 | [diff] [blame] | 2126 | free_id: |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 2127 | kfree(id); |
Sagi Grimberg | 331813f | 2019-08-02 18:11:42 -0700 | [diff] [blame] | 2128 | out: |
Sagi Grimberg | 205da24 | 2019-08-30 11:00:59 -0700 | [diff] [blame] | 2129 | /* |
| 2130 | * Only fail the function if we got a fatal error back from the |
| 2131 | * device, otherwise ignore the error and just move on. |
| 2132 | */ |
| 2133 | if (ret == -ENOMEM || (ret > 0 && !(ret & NVME_SC_DNR))) |
| 2134 | ret = 0; |
| 2135 | else if (ret > 0) |
Sagi Grimberg | 331813f | 2019-08-02 18:11:42 -0700 | [diff] [blame] | 2136 | ret = blk_status_to_errno(nvme_error_status(ret)); |
Christoph Hellwig | cdbff4f | 2017-08-16 16:14:47 +0200 | [diff] [blame] | 2137 | return ret; |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 2138 | } |
| 2139 | |
Keith Busch | 240e6ee | 2020-06-29 12:06:41 -0700 | [diff] [blame] | 2140 | static int nvme_revalidate_disk(struct gendisk *disk) |
| 2141 | { |
| 2142 | int ret; |
| 2143 | |
| 2144 | ret = _nvme_revalidate_disk(disk); |
| 2145 | if (ret) |
| 2146 | return ret; |
| 2147 | |
| 2148 | #ifdef CONFIG_BLK_DEV_ZONED |
| 2149 | if (blk_queue_is_zoned(disk->queue)) { |
| 2150 | struct nvme_ns *ns = disk->private_data; |
| 2151 | struct nvme_ctrl *ctrl = ns->ctrl; |
| 2152 | |
| 2153 | ret = blk_revalidate_disk_zones(disk, NULL); |
| 2154 | if (!ret) |
| 2155 | blk_queue_max_zone_append_sectors(disk->queue, |
| 2156 | ctrl->max_zone_append); |
| 2157 | } |
| 2158 | #endif |
| 2159 | return ret; |
| 2160 | } |
| 2161 | |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 2162 | static char nvme_pr_type(enum pr_type type) |
| 2163 | { |
| 2164 | switch (type) { |
| 2165 | case PR_WRITE_EXCLUSIVE: |
| 2166 | return 1; |
| 2167 | case PR_EXCLUSIVE_ACCESS: |
| 2168 | return 2; |
| 2169 | case PR_WRITE_EXCLUSIVE_REG_ONLY: |
| 2170 | return 3; |
| 2171 | case PR_EXCLUSIVE_ACCESS_REG_ONLY: |
| 2172 | return 4; |
| 2173 | case PR_WRITE_EXCLUSIVE_ALL_REGS: |
| 2174 | return 5; |
| 2175 | case PR_EXCLUSIVE_ACCESS_ALL_REGS: |
| 2176 | return 6; |
| 2177 | default: |
| 2178 | return 0; |
| 2179 | } |
| 2180 | }; |
| 2181 | |
| 2182 | static int nvme_pr_command(struct block_device *bdev, u32 cdw10, |
| 2183 | u64 key, u64 sa_key, u8 op) |
| 2184 | { |
Christoph Hellwig | 32acab3 | 2017-11-02 12:59:30 +0100 | [diff] [blame] | 2185 | struct nvme_ns_head *head = NULL; |
| 2186 | struct nvme_ns *ns; |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 2187 | struct nvme_command c; |
Christoph Hellwig | 32acab3 | 2017-11-02 12:59:30 +0100 | [diff] [blame] | 2188 | int srcu_idx, ret; |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 2189 | u8 data[16] = { 0, }; |
| 2190 | |
Keith Busch | b0d61d5 | 2017-11-16 13:36:49 -0700 | [diff] [blame] | 2191 | ns = nvme_get_ns_from_disk(bdev->bd_disk, &head, &srcu_idx); |
| 2192 | if (unlikely(!ns)) |
| 2193 | return -EWOULDBLOCK; |
| 2194 | |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 2195 | put_unaligned_le64(key, &data[0]); |
| 2196 | put_unaligned_le64(sa_key, &data[8]); |
| 2197 | |
| 2198 | memset(&c, 0, sizeof(c)); |
| 2199 | c.common.opcode = op; |
Keith Busch | b0d61d5 | 2017-11-16 13:36:49 -0700 | [diff] [blame] | 2200 | c.common.nsid = cpu_to_le32(ns->head->ns_id); |
Chaitanya Kulkarni | b7c8f36 | 2018-12-12 15:11:37 -0800 | [diff] [blame] | 2201 | c.common.cdw10 = cpu_to_le32(cdw10); |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 2202 | |
Keith Busch | b0d61d5 | 2017-11-16 13:36:49 -0700 | [diff] [blame] | 2203 | ret = nvme_submit_sync_cmd(ns->queue, &c, data, 16); |
Christoph Hellwig | 32acab3 | 2017-11-02 12:59:30 +0100 | [diff] [blame] | 2204 | nvme_put_ns_from_disk(head, srcu_idx); |
| 2205 | return ret; |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 2206 | } |
| 2207 | |
| 2208 | static int nvme_pr_register(struct block_device *bdev, u64 old, |
| 2209 | u64 new, unsigned flags) |
| 2210 | { |
| 2211 | u32 cdw10; |
| 2212 | |
| 2213 | if (flags & ~PR_FL_IGNORE_KEY) |
| 2214 | return -EOPNOTSUPP; |
| 2215 | |
| 2216 | cdw10 = old ? 2 : 0; |
| 2217 | cdw10 |= (flags & PR_FL_IGNORE_KEY) ? 1 << 3 : 0; |
| 2218 | cdw10 |= (1 << 30) | (1 << 31); /* PTPL=1 */ |
| 2219 | return nvme_pr_command(bdev, cdw10, old, new, nvme_cmd_resv_register); |
| 2220 | } |
| 2221 | |
| 2222 | static int nvme_pr_reserve(struct block_device *bdev, u64 key, |
| 2223 | enum pr_type type, unsigned flags) |
| 2224 | { |
| 2225 | u32 cdw10; |
| 2226 | |
| 2227 | if (flags & ~PR_FL_IGNORE_KEY) |
| 2228 | return -EOPNOTSUPP; |
| 2229 | |
| 2230 | cdw10 = nvme_pr_type(type) << 8; |
| 2231 | cdw10 |= ((flags & PR_FL_IGNORE_KEY) ? 1 << 3 : 0); |
| 2232 | return nvme_pr_command(bdev, cdw10, key, 0, nvme_cmd_resv_acquire); |
| 2233 | } |
| 2234 | |
| 2235 | static int nvme_pr_preempt(struct block_device *bdev, u64 old, u64 new, |
| 2236 | enum pr_type type, bool abort) |
| 2237 | { |
Ivan Bornyakov | e9a9853 | 2018-05-23 17:56:11 +0300 | [diff] [blame] | 2238 | u32 cdw10 = nvme_pr_type(type) << 8 | (abort ? 2 : 1); |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 2239 | return nvme_pr_command(bdev, cdw10, old, new, nvme_cmd_resv_acquire); |
| 2240 | } |
| 2241 | |
| 2242 | static int nvme_pr_clear(struct block_device *bdev, u64 key) |
| 2243 | { |
Dan Carpenter | 8c0b391 | 2015-12-09 13:24:06 +0300 | [diff] [blame] | 2244 | u32 cdw10 = 1 | (key ? 1 << 3 : 0); |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 2245 | return nvme_pr_command(bdev, cdw10, key, 0, nvme_cmd_resv_register); |
| 2246 | } |
| 2247 | |
| 2248 | static int nvme_pr_release(struct block_device *bdev, u64 key, enum pr_type type) |
| 2249 | { |
Ivan Bornyakov | e9a9853 | 2018-05-23 17:56:11 +0300 | [diff] [blame] | 2250 | u32 cdw10 = nvme_pr_type(type) << 8 | (key ? 1 << 3 : 0); |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 2251 | return nvme_pr_command(bdev, cdw10, key, 0, nvme_cmd_resv_release); |
| 2252 | } |
| 2253 | |
| 2254 | static const struct pr_ops nvme_pr_ops = { |
| 2255 | .pr_register = nvme_pr_register, |
| 2256 | .pr_reserve = nvme_pr_reserve, |
| 2257 | .pr_release = nvme_pr_release, |
| 2258 | .pr_preempt = nvme_pr_preempt, |
| 2259 | .pr_clear = nvme_pr_clear, |
| 2260 | }; |
| 2261 | |
Scott Bauer | a98e58e5 | 2017-02-03 12:50:32 -0700 | [diff] [blame] | 2262 | #ifdef CONFIG_BLK_SED_OPAL |
Christoph Hellwig | 4f1244c | 2017-02-17 13:59:39 +0100 | [diff] [blame] | 2263 | int nvme_sec_submit(void *data, u16 spsp, u8 secp, void *buffer, size_t len, |
| 2264 | bool send) |
Scott Bauer | a98e58e5 | 2017-02-03 12:50:32 -0700 | [diff] [blame] | 2265 | { |
Christoph Hellwig | 4f1244c | 2017-02-17 13:59:39 +0100 | [diff] [blame] | 2266 | struct nvme_ctrl *ctrl = data; |
Scott Bauer | a98e58e5 | 2017-02-03 12:50:32 -0700 | [diff] [blame] | 2267 | struct nvme_command cmd; |
Scott Bauer | a98e58e5 | 2017-02-03 12:50:32 -0700 | [diff] [blame] | 2268 | |
| 2269 | memset(&cmd, 0, sizeof(cmd)); |
| 2270 | if (send) |
| 2271 | cmd.common.opcode = nvme_admin_security_send; |
| 2272 | else |
| 2273 | cmd.common.opcode = nvme_admin_security_recv; |
Scott Bauer | a98e58e5 | 2017-02-03 12:50:32 -0700 | [diff] [blame] | 2274 | cmd.common.nsid = 0; |
Chaitanya Kulkarni | b7c8f36 | 2018-12-12 15:11:37 -0800 | [diff] [blame] | 2275 | cmd.common.cdw10 = cpu_to_le32(((u32)secp) << 24 | ((u32)spsp) << 8); |
| 2276 | cmd.common.cdw11 = cpu_to_le32(len); |
Scott Bauer | a98e58e5 | 2017-02-03 12:50:32 -0700 | [diff] [blame] | 2277 | |
| 2278 | return __nvme_submit_sync_cmd(ctrl->admin_q, &cmd, NULL, buffer, len, |
Sagi Grimberg | 6287b51 | 2018-12-14 11:06:07 -0800 | [diff] [blame] | 2279 | ADMIN_TIMEOUT, NVME_QID_ANY, 1, 0, false); |
Scott Bauer | a98e58e5 | 2017-02-03 12:50:32 -0700 | [diff] [blame] | 2280 | } |
| 2281 | EXPORT_SYMBOL_GPL(nvme_sec_submit); |
| 2282 | #endif /* CONFIG_BLK_SED_OPAL */ |
| 2283 | |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 2284 | static const struct block_device_operations nvme_fops = { |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 2285 | .owner = THIS_MODULE, |
| 2286 | .ioctl = nvme_ioctl, |
masahiro31.yamada@kioxia.com | c225b61 | 2020-03-05 11:13:29 +0000 | [diff] [blame] | 2287 | .compat_ioctl = nvme_compat_ioctl, |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 2288 | .open = nvme_open, |
| 2289 | .release = nvme_release, |
| 2290 | .getgeo = nvme_getgeo, |
| 2291 | .revalidate_disk= nvme_revalidate_disk, |
Keith Busch | 240e6ee | 2020-06-29 12:06:41 -0700 | [diff] [blame] | 2292 | .report_zones = nvme_report_zones, |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 2293 | .pr_ops = &nvme_pr_ops, |
| 2294 | }; |
| 2295 | |
Christoph Hellwig | 32acab3 | 2017-11-02 12:59:30 +0100 | [diff] [blame] | 2296 | #ifdef CONFIG_NVME_MULTIPATH |
| 2297 | static int nvme_ns_head_open(struct block_device *bdev, fmode_t mode) |
| 2298 | { |
| 2299 | struct nvme_ns_head *head = bdev->bd_disk->private_data; |
| 2300 | |
| 2301 | if (!kref_get_unless_zero(&head->ref)) |
| 2302 | return -ENXIO; |
| 2303 | return 0; |
| 2304 | } |
| 2305 | |
| 2306 | static void nvme_ns_head_release(struct gendisk *disk, fmode_t mode) |
| 2307 | { |
| 2308 | nvme_put_ns_head(disk->private_data); |
| 2309 | } |
| 2310 | |
| 2311 | const struct block_device_operations nvme_ns_head_ops = { |
| 2312 | .owner = THIS_MODULE, |
Christoph Hellwig | c62b37d | 2020-07-01 10:59:43 +0200 | [diff] [blame] | 2313 | .submit_bio = nvme_ns_head_submit_bio, |
Christoph Hellwig | 32acab3 | 2017-11-02 12:59:30 +0100 | [diff] [blame] | 2314 | .open = nvme_ns_head_open, |
| 2315 | .release = nvme_ns_head_release, |
| 2316 | .ioctl = nvme_ioctl, |
masahiro31.yamada@kioxia.com | c225b61 | 2020-03-05 11:13:29 +0000 | [diff] [blame] | 2317 | .compat_ioctl = nvme_compat_ioctl, |
Christoph Hellwig | 32acab3 | 2017-11-02 12:59:30 +0100 | [diff] [blame] | 2318 | .getgeo = nvme_getgeo, |
Keith Busch | 240e6ee | 2020-06-29 12:06:41 -0700 | [diff] [blame] | 2319 | .report_zones = nvme_report_zones, |
Christoph Hellwig | 32acab3 | 2017-11-02 12:59:30 +0100 | [diff] [blame] | 2320 | .pr_ops = &nvme_pr_ops, |
| 2321 | }; |
| 2322 | #endif /* CONFIG_NVME_MULTIPATH */ |
| 2323 | |
Christoph Hellwig | 5fd4ce1 | 2015-11-28 15:03:49 +0100 | [diff] [blame] | 2324 | static int nvme_wait_ready(struct nvme_ctrl *ctrl, u64 cap, bool enabled) |
| 2325 | { |
| 2326 | unsigned long timeout = |
| 2327 | ((NVME_CAP_TIMEOUT(cap) + 1) * HZ / 2) + jiffies; |
| 2328 | u32 csts, bit = enabled ? NVME_CSTS_RDY : 0; |
| 2329 | int ret; |
| 2330 | |
| 2331 | while ((ret = ctrl->ops->reg_read32(ctrl, NVME_REG_CSTS, &csts)) == 0) { |
Keith Busch | 0df1e4f | 2016-10-11 13:31:58 -0400 | [diff] [blame] | 2332 | if (csts == ~0) |
| 2333 | return -ENODEV; |
Christoph Hellwig | 5fd4ce1 | 2015-11-28 15:03:49 +0100 | [diff] [blame] | 2334 | if ((csts & NVME_CSTS_RDY) == bit) |
| 2335 | break; |
| 2336 | |
Josh Triplett | 3e98c24 | 2020-02-28 18:52:28 -0800 | [diff] [blame] | 2337 | usleep_range(1000, 2000); |
Christoph Hellwig | 5fd4ce1 | 2015-11-28 15:03:49 +0100 | [diff] [blame] | 2338 | if (fatal_signal_pending(current)) |
| 2339 | return -EINTR; |
| 2340 | if (time_after(jiffies, timeout)) { |
Sagi Grimberg | 1b3c47c | 2016-02-10 08:51:15 -0700 | [diff] [blame] | 2341 | dev_err(ctrl->device, |
Rupesh Girase | 94d2e70 | 2020-02-27 22:15:26 +0530 | [diff] [blame] | 2342 | "Device not ready; aborting %s, CSTS=0x%x\n", |
| 2343 | enabled ? "initialisation" : "reset", csts); |
Christoph Hellwig | 5fd4ce1 | 2015-11-28 15:03:49 +0100 | [diff] [blame] | 2344 | return -ENODEV; |
| 2345 | } |
| 2346 | } |
| 2347 | |
| 2348 | return ret; |
| 2349 | } |
| 2350 | |
| 2351 | /* |
| 2352 | * If the device has been passed off to us in an enabled state, just clear |
| 2353 | * the enabled bit. The spec says we should set the 'shutdown notification |
| 2354 | * bits', but doing so may cause the device to complete commands to the |
| 2355 | * admin queue ... and we don't know what memory that might be pointing at! |
| 2356 | */ |
Sagi Grimberg | b5b0504 | 2019-07-22 17:06:54 -0700 | [diff] [blame] | 2357 | int nvme_disable_ctrl(struct nvme_ctrl *ctrl) |
Christoph Hellwig | 5fd4ce1 | 2015-11-28 15:03:49 +0100 | [diff] [blame] | 2358 | { |
| 2359 | int ret; |
| 2360 | |
| 2361 | ctrl->ctrl_config &= ~NVME_CC_SHN_MASK; |
| 2362 | ctrl->ctrl_config &= ~NVME_CC_ENABLE; |
| 2363 | |
| 2364 | ret = ctrl->ops->reg_write32(ctrl, NVME_REG_CC, ctrl->ctrl_config); |
| 2365 | if (ret) |
| 2366 | return ret; |
Guilherme G. Piccoli | 54adc01 | 2016-06-14 18:22:41 -0300 | [diff] [blame] | 2367 | |
Guilherme G. Piccoli | b5a10c5 | 2016-12-28 22:13:15 -0200 | [diff] [blame] | 2368 | if (ctrl->quirks & NVME_QUIRK_DELAY_BEFORE_CHK_RDY) |
Guilherme G. Piccoli | 54adc01 | 2016-06-14 18:22:41 -0300 | [diff] [blame] | 2369 | msleep(NVME_QUIRK_DELAY_AMOUNT); |
| 2370 | |
Sagi Grimberg | b5b0504 | 2019-07-22 17:06:54 -0700 | [diff] [blame] | 2371 | return nvme_wait_ready(ctrl, ctrl->cap, false); |
Christoph Hellwig | 5fd4ce1 | 2015-11-28 15:03:49 +0100 | [diff] [blame] | 2372 | } |
Ming Lin | 576d55d | 2016-02-10 10:03:32 -0800 | [diff] [blame] | 2373 | EXPORT_SYMBOL_GPL(nvme_disable_ctrl); |
Christoph Hellwig | 5fd4ce1 | 2015-11-28 15:03:49 +0100 | [diff] [blame] | 2374 | |
Sagi Grimberg | c0f2f45 | 2019-07-22 17:06:53 -0700 | [diff] [blame] | 2375 | int nvme_enable_ctrl(struct nvme_ctrl *ctrl) |
Christoph Hellwig | 5fd4ce1 | 2015-11-28 15:03:49 +0100 | [diff] [blame] | 2376 | { |
Chaitanya Kulkarni | 6c3c05b | 2020-07-16 17:51:37 -0700 | [diff] [blame] | 2377 | unsigned dev_page_min; |
Christoph Hellwig | 5fd4ce1 | 2015-11-28 15:03:49 +0100 | [diff] [blame] | 2378 | int ret; |
| 2379 | |
Sagi Grimberg | c0f2f45 | 2019-07-22 17:06:53 -0700 | [diff] [blame] | 2380 | ret = ctrl->ops->reg_read64(ctrl, NVME_REG_CAP, &ctrl->cap); |
| 2381 | if (ret) { |
| 2382 | dev_err(ctrl->device, "Reading CAP failed (%d)\n", ret); |
| 2383 | return ret; |
| 2384 | } |
| 2385 | dev_page_min = NVME_CAP_MPSMIN(ctrl->cap) + 12; |
| 2386 | |
Chaitanya Kulkarni | 6c3c05b | 2020-07-16 17:51:37 -0700 | [diff] [blame] | 2387 | if (NVME_CTRL_PAGE_SHIFT < dev_page_min) { |
Sagi Grimberg | 1b3c47c | 2016-02-10 08:51:15 -0700 | [diff] [blame] | 2388 | dev_err(ctrl->device, |
Christoph Hellwig | 5fd4ce1 | 2015-11-28 15:03:49 +0100 | [diff] [blame] | 2389 | "Minimum device page size %u too large for host (%u)\n", |
Chaitanya Kulkarni | 6c3c05b | 2020-07-16 17:51:37 -0700 | [diff] [blame] | 2390 | 1 << dev_page_min, 1 << NVME_CTRL_PAGE_SHIFT); |
Christoph Hellwig | 5fd4ce1 | 2015-11-28 15:03:49 +0100 | [diff] [blame] | 2391 | return -ENODEV; |
| 2392 | } |
| 2393 | |
Niklas Cassel | 71010c3 | 2020-06-29 12:06:39 -0700 | [diff] [blame] | 2394 | if (NVME_CAP_CSS(ctrl->cap) & NVME_CAP_CSS_CSI) |
| 2395 | ctrl->ctrl_config = NVME_CC_CSS_CSI; |
| 2396 | else |
| 2397 | ctrl->ctrl_config = NVME_CC_CSS_NVM; |
Chaitanya Kulkarni | 6c3c05b | 2020-07-16 17:51:37 -0700 | [diff] [blame] | 2398 | ctrl->ctrl_config |= (NVME_CTRL_PAGE_SHIFT - 12) << NVME_CC_MPS_SHIFT; |
Max Gurtovoy | 60b43f6 | 2017-08-13 19:21:07 +0300 | [diff] [blame] | 2399 | ctrl->ctrl_config |= NVME_CC_AMS_RR | NVME_CC_SHN_NONE; |
Christoph Hellwig | 5fd4ce1 | 2015-11-28 15:03:49 +0100 | [diff] [blame] | 2400 | ctrl->ctrl_config |= NVME_CC_IOSQES | NVME_CC_IOCQES; |
| 2401 | ctrl->ctrl_config |= NVME_CC_ENABLE; |
| 2402 | |
| 2403 | ret = ctrl->ops->reg_write32(ctrl, NVME_REG_CC, ctrl->ctrl_config); |
| 2404 | if (ret) |
| 2405 | return ret; |
Sagi Grimberg | c0f2f45 | 2019-07-22 17:06:53 -0700 | [diff] [blame] | 2406 | return nvme_wait_ready(ctrl, ctrl->cap, true); |
Christoph Hellwig | 5fd4ce1 | 2015-11-28 15:03:49 +0100 | [diff] [blame] | 2407 | } |
Ming Lin | 576d55d | 2016-02-10 10:03:32 -0800 | [diff] [blame] | 2408 | EXPORT_SYMBOL_GPL(nvme_enable_ctrl); |
Christoph Hellwig | 5fd4ce1 | 2015-11-28 15:03:49 +0100 | [diff] [blame] | 2409 | |
| 2410 | int nvme_shutdown_ctrl(struct nvme_ctrl *ctrl) |
| 2411 | { |
Martin K. Petersen | 07fbd32 | 2017-08-25 19:14:50 -0400 | [diff] [blame] | 2412 | unsigned long timeout = jiffies + (ctrl->shutdown_timeout * HZ); |
Christoph Hellwig | 5fd4ce1 | 2015-11-28 15:03:49 +0100 | [diff] [blame] | 2413 | u32 csts; |
| 2414 | int ret; |
| 2415 | |
| 2416 | ctrl->ctrl_config &= ~NVME_CC_SHN_MASK; |
| 2417 | ctrl->ctrl_config |= NVME_CC_SHN_NORMAL; |
| 2418 | |
| 2419 | ret = ctrl->ops->reg_write32(ctrl, NVME_REG_CC, ctrl->ctrl_config); |
| 2420 | if (ret) |
| 2421 | return ret; |
| 2422 | |
| 2423 | while ((ret = ctrl->ops->reg_read32(ctrl, NVME_REG_CSTS, &csts)) == 0) { |
| 2424 | if ((csts & NVME_CSTS_SHST_MASK) == NVME_CSTS_SHST_CMPLT) |
| 2425 | break; |
| 2426 | |
| 2427 | msleep(100); |
| 2428 | if (fatal_signal_pending(current)) |
| 2429 | return -EINTR; |
| 2430 | if (time_after(jiffies, timeout)) { |
Sagi Grimberg | 1b3c47c | 2016-02-10 08:51:15 -0700 | [diff] [blame] | 2431 | dev_err(ctrl->device, |
Christoph Hellwig | 5fd4ce1 | 2015-11-28 15:03:49 +0100 | [diff] [blame] | 2432 | "Device shutdown incomplete; abort shutdown\n"); |
| 2433 | return -ENODEV; |
| 2434 | } |
| 2435 | } |
| 2436 | |
| 2437 | return ret; |
| 2438 | } |
Ming Lin | 576d55d | 2016-02-10 10:03:32 -0800 | [diff] [blame] | 2439 | EXPORT_SYMBOL_GPL(nvme_shutdown_ctrl); |
Christoph Hellwig | 5fd4ce1 | 2015-11-28 15:03:49 +0100 | [diff] [blame] | 2440 | |
Christoph Hellwig | da35825 | 2016-03-02 18:07:11 +0100 | [diff] [blame] | 2441 | static void nvme_set_queue_limits(struct nvme_ctrl *ctrl, |
| 2442 | struct request_queue *q) |
| 2443 | { |
Jens Axboe | 7c88cb0 | 2016-04-12 15:43:09 -0600 | [diff] [blame] | 2444 | bool vwc = false; |
| 2445 | |
Christoph Hellwig | da35825 | 2016-03-02 18:07:11 +0100 | [diff] [blame] | 2446 | if (ctrl->max_hw_sectors) { |
Christoph Hellwig | 45686b6 | 2016-03-02 18:07:12 +0100 | [diff] [blame] | 2447 | u32 max_segments = |
Chaitanya Kulkarni | 6c3c05b | 2020-07-16 17:51:37 -0700 | [diff] [blame] | 2448 | (ctrl->max_hw_sectors / (NVME_CTRL_PAGE_SIZE >> 9)) + 1; |
Christoph Hellwig | 45686b6 | 2016-03-02 18:07:12 +0100 | [diff] [blame] | 2449 | |
Jens Axboe | 943e942 | 2018-06-21 09:49:37 -0600 | [diff] [blame] | 2450 | max_segments = min_not_zero(max_segments, ctrl->max_segments); |
Christoph Hellwig | da35825 | 2016-03-02 18:07:11 +0100 | [diff] [blame] | 2451 | blk_queue_max_hw_sectors(q, ctrl->max_hw_sectors); |
Christoph Hellwig | 45686b6 | 2016-03-02 18:07:12 +0100 | [diff] [blame] | 2452 | blk_queue_max_segments(q, min_t(u32, max_segments, USHRT_MAX)); |
Christoph Hellwig | da35825 | 2016-03-02 18:07:11 +0100 | [diff] [blame] | 2453 | } |
Chaitanya Kulkarni | 6c3c05b | 2020-07-16 17:51:37 -0700 | [diff] [blame] | 2454 | blk_queue_virt_boundary(q, NVME_CTRL_PAGE_SIZE - 1); |
Keith Busch | 3b2a1eb | 2020-05-20 19:22:53 -0700 | [diff] [blame] | 2455 | blk_queue_dma_alignment(q, 7); |
Jens Axboe | 7c88cb0 | 2016-04-12 15:43:09 -0600 | [diff] [blame] | 2456 | if (ctrl->vwc & NVME_CTRL_VWC_PRESENT) |
| 2457 | vwc = true; |
| 2458 | blk_queue_write_cache(q, vwc, vwc); |
Christoph Hellwig | da35825 | 2016-03-02 18:07:11 +0100 | [diff] [blame] | 2459 | } |
| 2460 | |
Jon Derrick | dbf86b3 | 2017-08-16 09:51:29 +0200 | [diff] [blame] | 2461 | static int nvme_configure_timestamp(struct nvme_ctrl *ctrl) |
| 2462 | { |
| 2463 | __le64 ts; |
| 2464 | int ret; |
| 2465 | |
| 2466 | if (!(ctrl->oncs & NVME_CTRL_ONCS_TIMESTAMP)) |
| 2467 | return 0; |
| 2468 | |
| 2469 | ts = cpu_to_le64(ktime_to_ms(ktime_get_real())); |
| 2470 | ret = nvme_set_features(ctrl, NVME_FEAT_TIMESTAMP, 0, &ts, sizeof(ts), |
| 2471 | NULL); |
| 2472 | if (ret) |
| 2473 | dev_warn_once(ctrl->device, |
| 2474 | "could not set timestamp (%d)\n", ret); |
| 2475 | return ret; |
| 2476 | } |
| 2477 | |
Keith Busch | 49cd84b | 2018-11-27 09:40:57 -0700 | [diff] [blame] | 2478 | static int nvme_configure_acre(struct nvme_ctrl *ctrl) |
| 2479 | { |
| 2480 | struct nvme_feat_host_behavior *host; |
| 2481 | int ret; |
| 2482 | |
| 2483 | /* Don't bother enabling the feature if retry delay is not reported */ |
| 2484 | if (!ctrl->crdt[0]) |
| 2485 | return 0; |
| 2486 | |
| 2487 | host = kzalloc(sizeof(*host), GFP_KERNEL); |
| 2488 | if (!host) |
| 2489 | return 0; |
| 2490 | |
| 2491 | host->acre = NVME_ENABLE_ACRE; |
| 2492 | ret = nvme_set_features(ctrl, NVME_FEAT_HOST_BEHAVIOR, 0, |
| 2493 | host, sizeof(*host), NULL); |
| 2494 | kfree(host); |
| 2495 | return ret; |
| 2496 | } |
| 2497 | |
Keith Busch | 634b832 | 2017-08-10 11:23:31 +0200 | [diff] [blame] | 2498 | static int nvme_configure_apst(struct nvme_ctrl *ctrl) |
Andy Lutomirski | c5552fd | 2017-02-07 10:08:45 -0800 | [diff] [blame] | 2499 | { |
| 2500 | /* |
| 2501 | * APST (Autonomous Power State Transition) lets us program a |
| 2502 | * table of power state transitions that the controller will |
| 2503 | * perform automatically. We configure it with a simple |
| 2504 | * heuristic: we are willing to spend at most 2% of the time |
| 2505 | * transitioning between power states. Therefore, when running |
| 2506 | * in any given state, we will enter the next lower-power |
Andy Lutomirski | 76e4ad0 | 2017-04-21 16:19:22 -0700 | [diff] [blame] | 2507 | * non-operational state after waiting 50 * (enlat + exlat) |
Kai-Heng Feng | da87591 | 2017-06-07 15:25:42 +0800 | [diff] [blame] | 2508 | * microseconds, as long as that state's exit latency is under |
Andy Lutomirski | c5552fd | 2017-02-07 10:08:45 -0800 | [diff] [blame] | 2509 | * the requested maximum latency. |
| 2510 | * |
| 2511 | * We will not autonomously enter any non-operational state for |
| 2512 | * which the total latency exceeds ps_max_latency_us. Users |
| 2513 | * can set ps_max_latency_us to zero to turn off APST. |
| 2514 | */ |
| 2515 | |
| 2516 | unsigned apste; |
| 2517 | struct nvme_feat_auto_pst *table; |
Andy Lutomirski | fb0dc39 | 2017-04-21 16:19:23 -0700 | [diff] [blame] | 2518 | u64 max_lat_us = 0; |
| 2519 | int max_ps = -1; |
Andy Lutomirski | c5552fd | 2017-02-07 10:08:45 -0800 | [diff] [blame] | 2520 | int ret; |
| 2521 | |
| 2522 | /* |
| 2523 | * If APST isn't supported or if we haven't been initialized yet, |
| 2524 | * then don't do anything. |
| 2525 | */ |
| 2526 | if (!ctrl->apsta) |
Keith Busch | 634b832 | 2017-08-10 11:23:31 +0200 | [diff] [blame] | 2527 | return 0; |
Andy Lutomirski | c5552fd | 2017-02-07 10:08:45 -0800 | [diff] [blame] | 2528 | |
| 2529 | if (ctrl->npss > 31) { |
| 2530 | dev_warn(ctrl->device, "NPSS is invalid; not using APST\n"); |
Keith Busch | 634b832 | 2017-08-10 11:23:31 +0200 | [diff] [blame] | 2531 | return 0; |
Andy Lutomirski | c5552fd | 2017-02-07 10:08:45 -0800 | [diff] [blame] | 2532 | } |
| 2533 | |
| 2534 | table = kzalloc(sizeof(*table), GFP_KERNEL); |
| 2535 | if (!table) |
Keith Busch | 634b832 | 2017-08-10 11:23:31 +0200 | [diff] [blame] | 2536 | return 0; |
Andy Lutomirski | c5552fd | 2017-02-07 10:08:45 -0800 | [diff] [blame] | 2537 | |
Kai-Heng Feng | 76a5af8 | 2017-06-26 16:39:54 -0400 | [diff] [blame] | 2538 | if (!ctrl->apst_enabled || ctrl->ps_max_latency_us == 0) { |
Andy Lutomirski | c5552fd | 2017-02-07 10:08:45 -0800 | [diff] [blame] | 2539 | /* Turn off APST. */ |
| 2540 | apste = 0; |
Andy Lutomirski | fb0dc39 | 2017-04-21 16:19:23 -0700 | [diff] [blame] | 2541 | dev_dbg(ctrl->device, "APST disabled\n"); |
Andy Lutomirski | c5552fd | 2017-02-07 10:08:45 -0800 | [diff] [blame] | 2542 | } else { |
| 2543 | __le64 target = cpu_to_le64(0); |
| 2544 | int state; |
| 2545 | |
| 2546 | /* |
| 2547 | * Walk through all states from lowest- to highest-power. |
| 2548 | * According to the spec, lower-numbered states use more |
| 2549 | * power. NPSS, despite the name, is the index of the |
| 2550 | * lowest-power state, not the number of states. |
| 2551 | */ |
| 2552 | for (state = (int)ctrl->npss; state >= 0; state--) { |
Kai-Heng Feng | da87591 | 2017-06-07 15:25:42 +0800 | [diff] [blame] | 2553 | u64 total_latency_us, exit_latency_us, transition_ms; |
Andy Lutomirski | c5552fd | 2017-02-07 10:08:45 -0800 | [diff] [blame] | 2554 | |
| 2555 | if (target) |
| 2556 | table->entries[state] = target; |
| 2557 | |
| 2558 | /* |
Andy Lutomirski | ff5350a | 2017-04-20 13:37:55 -0700 | [diff] [blame] | 2559 | * Don't allow transitions to the deepest state |
| 2560 | * if it's quirked off. |
| 2561 | */ |
| 2562 | if (state == ctrl->npss && |
| 2563 | (ctrl->quirks & NVME_QUIRK_NO_DEEPEST_PS)) |
| 2564 | continue; |
| 2565 | |
| 2566 | /* |
Andy Lutomirski | c5552fd | 2017-02-07 10:08:45 -0800 | [diff] [blame] | 2567 | * Is this state a useful non-operational state for |
| 2568 | * higher-power states to autonomously transition to? |
| 2569 | */ |
| 2570 | if (!(ctrl->psd[state].flags & |
| 2571 | NVME_PS_FLAGS_NON_OP_STATE)) |
| 2572 | continue; |
| 2573 | |
Kai-Heng Feng | da87591 | 2017-06-07 15:25:42 +0800 | [diff] [blame] | 2574 | exit_latency_us = |
| 2575 | (u64)le32_to_cpu(ctrl->psd[state].exit_lat); |
| 2576 | if (exit_latency_us > ctrl->ps_max_latency_us) |
Andy Lutomirski | c5552fd | 2017-02-07 10:08:45 -0800 | [diff] [blame] | 2577 | continue; |
| 2578 | |
Kai-Heng Feng | da87591 | 2017-06-07 15:25:42 +0800 | [diff] [blame] | 2579 | total_latency_us = |
| 2580 | exit_latency_us + |
| 2581 | le32_to_cpu(ctrl->psd[state].entry_lat); |
| 2582 | |
Andy Lutomirski | c5552fd | 2017-02-07 10:08:45 -0800 | [diff] [blame] | 2583 | /* |
| 2584 | * This state is good. Use it as the APST idle |
| 2585 | * target for higher power states. |
| 2586 | */ |
| 2587 | transition_ms = total_latency_us + 19; |
| 2588 | do_div(transition_ms, 20); |
| 2589 | if (transition_ms > (1 << 24) - 1) |
| 2590 | transition_ms = (1 << 24) - 1; |
| 2591 | |
| 2592 | target = cpu_to_le64((state << 3) | |
| 2593 | (transition_ms << 8)); |
Andy Lutomirski | fb0dc39 | 2017-04-21 16:19:23 -0700 | [diff] [blame] | 2594 | |
| 2595 | if (max_ps == -1) |
| 2596 | max_ps = state; |
| 2597 | |
| 2598 | if (total_latency_us > max_lat_us) |
| 2599 | max_lat_us = total_latency_us; |
Andy Lutomirski | c5552fd | 2017-02-07 10:08:45 -0800 | [diff] [blame] | 2600 | } |
| 2601 | |
| 2602 | apste = 1; |
Andy Lutomirski | fb0dc39 | 2017-04-21 16:19:23 -0700 | [diff] [blame] | 2603 | |
| 2604 | if (max_ps == -1) { |
| 2605 | dev_dbg(ctrl->device, "APST enabled but no non-operational states are available\n"); |
| 2606 | } else { |
| 2607 | dev_dbg(ctrl->device, "APST enabled: max PS = %d, max round-trip latency = %lluus, table = %*phN\n", |
| 2608 | max_ps, max_lat_us, (int)sizeof(*table), table); |
| 2609 | } |
Andy Lutomirski | c5552fd | 2017-02-07 10:08:45 -0800 | [diff] [blame] | 2610 | } |
| 2611 | |
| 2612 | ret = nvme_set_features(ctrl, NVME_FEAT_AUTO_PST, apste, |
| 2613 | table, sizeof(*table), NULL); |
| 2614 | if (ret) |
| 2615 | dev_err(ctrl->device, "failed to set APST feature (%d)\n", ret); |
| 2616 | |
| 2617 | kfree(table); |
Keith Busch | 634b832 | 2017-08-10 11:23:31 +0200 | [diff] [blame] | 2618 | return ret; |
Andy Lutomirski | c5552fd | 2017-02-07 10:08:45 -0800 | [diff] [blame] | 2619 | } |
| 2620 | |
| 2621 | static void nvme_set_latency_tolerance(struct device *dev, s32 val) |
| 2622 | { |
| 2623 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); |
| 2624 | u64 latency; |
| 2625 | |
| 2626 | switch (val) { |
| 2627 | case PM_QOS_LATENCY_TOLERANCE_NO_CONSTRAINT: |
| 2628 | case PM_QOS_LATENCY_ANY: |
| 2629 | latency = U64_MAX; |
| 2630 | break; |
| 2631 | |
| 2632 | default: |
| 2633 | latency = val; |
| 2634 | } |
| 2635 | |
| 2636 | if (ctrl->ps_max_latency_us != latency) { |
| 2637 | ctrl->ps_max_latency_us = latency; |
| 2638 | nvme_configure_apst(ctrl); |
| 2639 | } |
| 2640 | } |
| 2641 | |
Andy Lutomirski | bd4da3a | 2017-02-22 13:32:36 -0700 | [diff] [blame] | 2642 | struct nvme_core_quirk_entry { |
| 2643 | /* |
| 2644 | * NVMe model and firmware strings are padded with spaces. For |
| 2645 | * simplicity, strings in the quirk table are padded with NULLs |
| 2646 | * instead. |
| 2647 | */ |
| 2648 | u16 vid; |
| 2649 | const char *mn; |
| 2650 | const char *fr; |
| 2651 | unsigned long quirks; |
| 2652 | }; |
| 2653 | |
| 2654 | static const struct nvme_core_quirk_entry core_quirks[] = { |
Andy Lutomirski | c5552fd | 2017-02-07 10:08:45 -0800 | [diff] [blame] | 2655 | { |
Andy Lutomirski | be56945 | 2017-04-20 13:37:56 -0700 | [diff] [blame] | 2656 | /* |
| 2657 | * This Toshiba device seems to die using any APST states. See: |
| 2658 | * https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1678184/comments/11 |
| 2659 | */ |
| 2660 | .vid = 0x1179, |
| 2661 | .mn = "THNSF5256GPUK TOSHIBA", |
Andy Lutomirski | c5552fd | 2017-02-07 10:08:45 -0800 | [diff] [blame] | 2662 | .quirks = NVME_QUIRK_NO_APST, |
Mario Limonciello | cb32de1 | 2019-08-16 15:16:19 -0500 | [diff] [blame] | 2663 | }, |
| 2664 | { |
| 2665 | /* |
| 2666 | * This LiteON CL1-3D*-Q11 firmware version has a race |
| 2667 | * condition associated with actions related to suspend to idle |
| 2668 | * LiteON has resolved the problem in future firmware |
| 2669 | */ |
| 2670 | .vid = 0x14a4, |
| 2671 | .fr = "22301111", |
| 2672 | .quirks = NVME_QUIRK_SIMPLE_SUSPEND, |
Andy Lutomirski | be56945 | 2017-04-20 13:37:56 -0700 | [diff] [blame] | 2673 | } |
Andy Lutomirski | bd4da3a | 2017-02-22 13:32:36 -0700 | [diff] [blame] | 2674 | }; |
| 2675 | |
| 2676 | /* match is null-terminated but idstr is space-padded. */ |
| 2677 | static bool string_matches(const char *idstr, const char *match, size_t len) |
| 2678 | { |
| 2679 | size_t matchlen; |
| 2680 | |
| 2681 | if (!match) |
| 2682 | return true; |
| 2683 | |
| 2684 | matchlen = strlen(match); |
| 2685 | WARN_ON_ONCE(matchlen > len); |
| 2686 | |
| 2687 | if (memcmp(idstr, match, matchlen)) |
| 2688 | return false; |
| 2689 | |
| 2690 | for (; matchlen < len; matchlen++) |
| 2691 | if (idstr[matchlen] != ' ') |
| 2692 | return false; |
| 2693 | |
| 2694 | return true; |
| 2695 | } |
| 2696 | |
| 2697 | static bool quirk_matches(const struct nvme_id_ctrl *id, |
| 2698 | const struct nvme_core_quirk_entry *q) |
| 2699 | { |
| 2700 | return q->vid == le16_to_cpu(id->vid) && |
| 2701 | string_matches(id->mn, q->mn, sizeof(id->mn)) && |
| 2702 | string_matches(id->fr, q->fr, sizeof(id->fr)); |
| 2703 | } |
| 2704 | |
Christoph Hellwig | ab9e00c | 2017-11-09 13:48:55 +0100 | [diff] [blame] | 2705 | static void nvme_init_subnqn(struct nvme_subsystem *subsys, struct nvme_ctrl *ctrl, |
| 2706 | struct nvme_id_ctrl *id) |
Christoph Hellwig | 180de007 | 2017-06-26 12:39:02 +0200 | [diff] [blame] | 2707 | { |
| 2708 | size_t nqnlen; |
| 2709 | int off; |
| 2710 | |
James Dingwall | 6299358 | 2019-01-08 10:20:51 -0700 | [diff] [blame] | 2711 | if(!(ctrl->quirks & NVME_QUIRK_IGNORE_DEV_SUBNQN)) { |
| 2712 | nqnlen = strnlen(id->subnqn, NVMF_NQN_SIZE); |
| 2713 | if (nqnlen > 0 && nqnlen < NVMF_NQN_SIZE) { |
| 2714 | strlcpy(subsys->subnqn, id->subnqn, NVMF_NQN_SIZE); |
| 2715 | return; |
| 2716 | } |
Christoph Hellwig | 180de007 | 2017-06-26 12:39:02 +0200 | [diff] [blame] | 2717 | |
James Dingwall | 6299358 | 2019-01-08 10:20:51 -0700 | [diff] [blame] | 2718 | if (ctrl->vs >= NVME_VS(1, 2, 1)) |
| 2719 | dev_warn(ctrl->device, "missing or invalid SUBNQN field.\n"); |
| 2720 | } |
Christoph Hellwig | 180de007 | 2017-06-26 12:39:02 +0200 | [diff] [blame] | 2721 | |
| 2722 | /* Generate a "fake" NQN per Figure 254 in NVMe 1.3 + ECN 001 */ |
Christoph Hellwig | ab9e00c | 2017-11-09 13:48:55 +0100 | [diff] [blame] | 2723 | off = snprintf(subsys->subnqn, NVMF_NQN_SIZE, |
Keith Busch | 3da584f | 2019-01-08 09:37:43 -0700 | [diff] [blame] | 2724 | "nqn.2014.08.org.nvmexpress:%04x%04x", |
Christoph Hellwig | 180de007 | 2017-06-26 12:39:02 +0200 | [diff] [blame] | 2725 | le16_to_cpu(id->vid), le16_to_cpu(id->ssvid)); |
Christoph Hellwig | ab9e00c | 2017-11-09 13:48:55 +0100 | [diff] [blame] | 2726 | memcpy(subsys->subnqn + off, id->sn, sizeof(id->sn)); |
Christoph Hellwig | 180de007 | 2017-06-26 12:39:02 +0200 | [diff] [blame] | 2727 | off += sizeof(id->sn); |
Christoph Hellwig | ab9e00c | 2017-11-09 13:48:55 +0100 | [diff] [blame] | 2728 | memcpy(subsys->subnqn + off, id->mn, sizeof(id->mn)); |
Christoph Hellwig | 180de007 | 2017-06-26 12:39:02 +0200 | [diff] [blame] | 2729 | off += sizeof(id->mn); |
Christoph Hellwig | ab9e00c | 2017-11-09 13:48:55 +0100 | [diff] [blame] | 2730 | memset(subsys->subnqn + off, 0, sizeof(subsys->subnqn) - off); |
| 2731 | } |
| 2732 | |
Christoph Hellwig | ab9e00c | 2017-11-09 13:48:55 +0100 | [diff] [blame] | 2733 | static void nvme_release_subsystem(struct device *dev) |
| 2734 | { |
Logan Gunthorpe | e654dfd3 | 2019-07-18 17:53:50 -0600 | [diff] [blame] | 2735 | struct nvme_subsystem *subsys = |
| 2736 | container_of(dev, struct nvme_subsystem, dev); |
| 2737 | |
Keith Busch | 733e4b6 | 2019-09-05 10:33:54 -0600 | [diff] [blame] | 2738 | if (subsys->instance >= 0) |
| 2739 | ida_simple_remove(&nvme_instance_ida, subsys->instance); |
Logan Gunthorpe | e654dfd3 | 2019-07-18 17:53:50 -0600 | [diff] [blame] | 2740 | kfree(subsys); |
Christoph Hellwig | ab9e00c | 2017-11-09 13:48:55 +0100 | [diff] [blame] | 2741 | } |
| 2742 | |
| 2743 | static void nvme_destroy_subsystem(struct kref *ref) |
| 2744 | { |
| 2745 | struct nvme_subsystem *subsys = |
| 2746 | container_of(ref, struct nvme_subsystem, ref); |
| 2747 | |
| 2748 | mutex_lock(&nvme_subsystems_lock); |
| 2749 | list_del(&subsys->entry); |
| 2750 | mutex_unlock(&nvme_subsystems_lock); |
| 2751 | |
Christoph Hellwig | ed754e5 | 2017-11-09 13:50:43 +0100 | [diff] [blame] | 2752 | ida_destroy(&subsys->ns_ida); |
Christoph Hellwig | ab9e00c | 2017-11-09 13:48:55 +0100 | [diff] [blame] | 2753 | device_del(&subsys->dev); |
| 2754 | put_device(&subsys->dev); |
| 2755 | } |
| 2756 | |
| 2757 | static void nvme_put_subsystem(struct nvme_subsystem *subsys) |
| 2758 | { |
| 2759 | kref_put(&subsys->ref, nvme_destroy_subsystem); |
| 2760 | } |
| 2761 | |
| 2762 | static struct nvme_subsystem *__nvme_find_get_subsystem(const char *subsysnqn) |
| 2763 | { |
| 2764 | struct nvme_subsystem *subsys; |
| 2765 | |
| 2766 | lockdep_assert_held(&nvme_subsystems_lock); |
| 2767 | |
James Smart | c26aa57 | 2019-09-03 14:20:37 -0700 | [diff] [blame] | 2768 | /* |
| 2769 | * Fail matches for discovery subsystems. This results |
| 2770 | * in each discovery controller bound to a unique subsystem. |
| 2771 | * This avoids issues with validating controller values |
| 2772 | * that can only be true when there is a single unique subsystem. |
| 2773 | * There may be multiple and completely independent entities |
| 2774 | * that provide discovery controllers. |
| 2775 | */ |
| 2776 | if (!strcmp(subsysnqn, NVME_DISC_SUBSYS_NAME)) |
| 2777 | return NULL; |
| 2778 | |
Christoph Hellwig | ab9e00c | 2017-11-09 13:48:55 +0100 | [diff] [blame] | 2779 | list_for_each_entry(subsys, &nvme_subsystems, entry) { |
| 2780 | if (strcmp(subsys->subnqn, subsysnqn)) |
| 2781 | continue; |
| 2782 | if (!kref_get_unless_zero(&subsys->ref)) |
| 2783 | continue; |
| 2784 | return subsys; |
| 2785 | } |
| 2786 | |
| 2787 | return NULL; |
| 2788 | } |
| 2789 | |
Hannes Reinecke | 1e49693 | 2017-11-10 10:58:23 +0100 | [diff] [blame] | 2790 | #define SUBSYS_ATTR_RO(_name, _mode, _show) \ |
| 2791 | struct device_attribute subsys_attr_##_name = \ |
| 2792 | __ATTR(_name, _mode, _show, NULL) |
| 2793 | |
| 2794 | static ssize_t nvme_subsys_show_nqn(struct device *dev, |
| 2795 | struct device_attribute *attr, |
| 2796 | char *buf) |
| 2797 | { |
| 2798 | struct nvme_subsystem *subsys = |
| 2799 | container_of(dev, struct nvme_subsystem, dev); |
| 2800 | |
| 2801 | return snprintf(buf, PAGE_SIZE, "%s\n", subsys->subnqn); |
| 2802 | } |
| 2803 | static SUBSYS_ATTR_RO(subsysnqn, S_IRUGO, nvme_subsys_show_nqn); |
| 2804 | |
| 2805 | #define nvme_subsys_show_str_function(field) \ |
| 2806 | static ssize_t subsys_##field##_show(struct device *dev, \ |
| 2807 | struct device_attribute *attr, char *buf) \ |
| 2808 | { \ |
| 2809 | struct nvme_subsystem *subsys = \ |
| 2810 | container_of(dev, struct nvme_subsystem, dev); \ |
| 2811 | return sprintf(buf, "%.*s\n", \ |
| 2812 | (int)sizeof(subsys->field), subsys->field); \ |
| 2813 | } \ |
| 2814 | static SUBSYS_ATTR_RO(field, S_IRUGO, subsys_##field##_show); |
| 2815 | |
| 2816 | nvme_subsys_show_str_function(model); |
| 2817 | nvme_subsys_show_str_function(serial); |
| 2818 | nvme_subsys_show_str_function(firmware_rev); |
| 2819 | |
| 2820 | static struct attribute *nvme_subsys_attrs[] = { |
| 2821 | &subsys_attr_model.attr, |
| 2822 | &subsys_attr_serial.attr, |
| 2823 | &subsys_attr_firmware_rev.attr, |
| 2824 | &subsys_attr_subsysnqn.attr, |
Hannes Reinecke | 75c10e7 | 2019-02-18 11:43:26 +0100 | [diff] [blame] | 2825 | #ifdef CONFIG_NVME_MULTIPATH |
| 2826 | &subsys_attr_iopolicy.attr, |
| 2827 | #endif |
Hannes Reinecke | 1e49693 | 2017-11-10 10:58:23 +0100 | [diff] [blame] | 2828 | NULL, |
| 2829 | }; |
| 2830 | |
| 2831 | static struct attribute_group nvme_subsys_attrs_group = { |
| 2832 | .attrs = nvme_subsys_attrs, |
| 2833 | }; |
| 2834 | |
| 2835 | static const struct attribute_group *nvme_subsys_attrs_groups[] = { |
| 2836 | &nvme_subsys_attrs_group, |
| 2837 | NULL, |
| 2838 | }; |
| 2839 | |
Christoph Hellwig | 1b1031c | 2019-05-09 09:01:26 +0200 | [diff] [blame] | 2840 | static bool nvme_validate_cntlid(struct nvme_subsystem *subsys, |
| 2841 | struct nvme_ctrl *ctrl, struct nvme_id_ctrl *id) |
Israel Rukshin | b837b28 | 2018-01-04 17:56:14 +0200 | [diff] [blame] | 2842 | { |
Christoph Hellwig | 1b1031c | 2019-05-09 09:01:26 +0200 | [diff] [blame] | 2843 | struct nvme_ctrl *tmp; |
Israel Rukshin | b837b28 | 2018-01-04 17:56:14 +0200 | [diff] [blame] | 2844 | |
Christoph Hellwig | 32fd90c | 2019-05-08 09:48:27 +0200 | [diff] [blame] | 2845 | lockdep_assert_held(&nvme_subsystems_lock); |
| 2846 | |
Christoph Hellwig | 1b1031c | 2019-05-09 09:01:26 +0200 | [diff] [blame] | 2847 | list_for_each_entry(tmp, &subsys->ctrls, subsys_entry) { |
Israel Rukshin | e7c43fe | 2020-03-10 16:39:10 +0200 | [diff] [blame] | 2848 | if (nvme_state_terminal(tmp)) |
Christoph Hellwig | 1b1031c | 2019-05-09 09:01:26 +0200 | [diff] [blame] | 2849 | continue; |
| 2850 | |
| 2851 | if (tmp->cntlid == ctrl->cntlid) { |
| 2852 | dev_err(ctrl->device, |
| 2853 | "Duplicate cntlid %u with %s, rejecting\n", |
| 2854 | ctrl->cntlid, dev_name(tmp->device)); |
| 2855 | return false; |
| 2856 | } |
| 2857 | |
Keith Busch | 92decf1 | 2020-04-03 10:53:46 -0700 | [diff] [blame] | 2858 | if ((id->cmic & NVME_CTRL_CMIC_MULTI_CTRL) || |
Christoph Hellwig | 1b1031c | 2019-05-09 09:01:26 +0200 | [diff] [blame] | 2859 | (ctrl->opts && ctrl->opts->discovery_nqn)) |
| 2860 | continue; |
| 2861 | |
| 2862 | dev_err(ctrl->device, |
| 2863 | "Subsystem does not support multiple controllers\n"); |
| 2864 | return false; |
Israel Rukshin | b837b28 | 2018-01-04 17:56:14 +0200 | [diff] [blame] | 2865 | } |
Israel Rukshin | b837b28 | 2018-01-04 17:56:14 +0200 | [diff] [blame] | 2866 | |
Christoph Hellwig | 1b1031c | 2019-05-09 09:01:26 +0200 | [diff] [blame] | 2867 | return true; |
Israel Rukshin | b837b28 | 2018-01-04 17:56:14 +0200 | [diff] [blame] | 2868 | } |
| 2869 | |
Christoph Hellwig | ab9e00c | 2017-11-09 13:48:55 +0100 | [diff] [blame] | 2870 | static int nvme_init_subsystem(struct nvme_ctrl *ctrl, struct nvme_id_ctrl *id) |
| 2871 | { |
| 2872 | struct nvme_subsystem *subsys, *found; |
| 2873 | int ret; |
| 2874 | |
| 2875 | subsys = kzalloc(sizeof(*subsys), GFP_KERNEL); |
| 2876 | if (!subsys) |
| 2877 | return -ENOMEM; |
Keith Busch | 733e4b6 | 2019-09-05 10:33:54 -0600 | [diff] [blame] | 2878 | |
| 2879 | subsys->instance = -1; |
Christoph Hellwig | ab9e00c | 2017-11-09 13:48:55 +0100 | [diff] [blame] | 2880 | mutex_init(&subsys->lock); |
| 2881 | kref_init(&subsys->ref); |
| 2882 | INIT_LIST_HEAD(&subsys->ctrls); |
Christoph Hellwig | ed754e5 | 2017-11-09 13:50:43 +0100 | [diff] [blame] | 2883 | INIT_LIST_HEAD(&subsys->nsheads); |
Christoph Hellwig | ab9e00c | 2017-11-09 13:48:55 +0100 | [diff] [blame] | 2884 | nvme_init_subnqn(subsys, ctrl, id); |
| 2885 | memcpy(subsys->serial, id->sn, sizeof(subsys->serial)); |
| 2886 | memcpy(subsys->model, id->mn, sizeof(subsys->model)); |
| 2887 | memcpy(subsys->firmware_rev, id->fr, sizeof(subsys->firmware_rev)); |
| 2888 | subsys->vendor_id = le16_to_cpu(id->vid); |
| 2889 | subsys->cmic = id->cmic; |
Bart Van Assche | 81adb86 | 2019-06-28 09:53:31 -0700 | [diff] [blame] | 2890 | subsys->awupf = le16_to_cpu(id->awupf); |
Hannes Reinecke | 75c10e7 | 2019-02-18 11:43:26 +0100 | [diff] [blame] | 2891 | #ifdef CONFIG_NVME_MULTIPATH |
| 2892 | subsys->iopolicy = NVME_IOPOLICY_NUMA; |
| 2893 | #endif |
Christoph Hellwig | ab9e00c | 2017-11-09 13:48:55 +0100 | [diff] [blame] | 2894 | |
| 2895 | subsys->dev.class = nvme_subsys_class; |
| 2896 | subsys->dev.release = nvme_release_subsystem; |
Hannes Reinecke | 1e49693 | 2017-11-10 10:58:23 +0100 | [diff] [blame] | 2897 | subsys->dev.groups = nvme_subsys_attrs_groups; |
Keith Busch | 733e4b6 | 2019-09-05 10:33:54 -0600 | [diff] [blame] | 2898 | dev_set_name(&subsys->dev, "nvme-subsys%d", ctrl->instance); |
Christoph Hellwig | ab9e00c | 2017-11-09 13:48:55 +0100 | [diff] [blame] | 2899 | device_initialize(&subsys->dev); |
| 2900 | |
| 2901 | mutex_lock(&nvme_subsystems_lock); |
| 2902 | found = __nvme_find_get_subsystem(subsys->subnqn); |
| 2903 | if (found) { |
Logan Gunthorpe | e654dfd3 | 2019-07-18 17:53:50 -0600 | [diff] [blame] | 2904 | put_device(&subsys->dev); |
Christoph Hellwig | ab9e00c | 2017-11-09 13:48:55 +0100 | [diff] [blame] | 2905 | subsys = found; |
Christoph Hellwig | 32fd90c | 2019-05-08 09:48:27 +0200 | [diff] [blame] | 2906 | |
Christoph Hellwig | 1b1031c | 2019-05-09 09:01:26 +0200 | [diff] [blame] | 2907 | if (!nvme_validate_cntlid(subsys, ctrl, id)) { |
Christoph Hellwig | ab9e00c | 2017-11-09 13:48:55 +0100 | [diff] [blame] | 2908 | ret = -EINVAL; |
Christoph Hellwig | 32fd90c | 2019-05-08 09:48:27 +0200 | [diff] [blame] | 2909 | goto out_put_subsystem; |
Christoph Hellwig | ab9e00c | 2017-11-09 13:48:55 +0100 | [diff] [blame] | 2910 | } |
Christoph Hellwig | ab9e00c | 2017-11-09 13:48:55 +0100 | [diff] [blame] | 2911 | } else { |
| 2912 | ret = device_add(&subsys->dev); |
| 2913 | if (ret) { |
| 2914 | dev_err(ctrl->device, |
| 2915 | "failed to register subsystem device.\n"); |
Logan Gunthorpe | 8c36e66 | 2019-07-31 17:35:34 -0600 | [diff] [blame] | 2916 | put_device(&subsys->dev); |
Christoph Hellwig | ab9e00c | 2017-11-09 13:48:55 +0100 | [diff] [blame] | 2917 | goto out_unlock; |
| 2918 | } |
Christoph Hellwig | ed754e5 | 2017-11-09 13:50:43 +0100 | [diff] [blame] | 2919 | ida_init(&subsys->ns_ida); |
Christoph Hellwig | ab9e00c | 2017-11-09 13:48:55 +0100 | [diff] [blame] | 2920 | list_add_tail(&subsys->entry, &nvme_subsystems); |
| 2921 | } |
| 2922 | |
Dan Carpenter | bc4f6e0 | 2019-09-23 17:18:36 +0300 | [diff] [blame] | 2923 | ret = sysfs_create_link(&subsys->dev.kobj, &ctrl->device->kobj, |
| 2924 | dev_name(ctrl->device)); |
| 2925 | if (ret) { |
Christoph Hellwig | ab9e00c | 2017-11-09 13:48:55 +0100 | [diff] [blame] | 2926 | dev_err(ctrl->device, |
| 2927 | "failed to create sysfs link from subsystem.\n"); |
Christoph Hellwig | 32fd90c | 2019-05-08 09:48:27 +0200 | [diff] [blame] | 2928 | goto out_put_subsystem; |
Christoph Hellwig | ab9e00c | 2017-11-09 13:48:55 +0100 | [diff] [blame] | 2929 | } |
| 2930 | |
Keith Busch | 733e4b6 | 2019-09-05 10:33:54 -0600 | [diff] [blame] | 2931 | if (!found) |
| 2932 | subsys->instance = ctrl->instance; |
Christoph Hellwig | 32fd90c | 2019-05-08 09:48:27 +0200 | [diff] [blame] | 2933 | ctrl->subsys = subsys; |
Christoph Hellwig | ab9e00c | 2017-11-09 13:48:55 +0100 | [diff] [blame] | 2934 | list_add_tail(&ctrl->subsys_entry, &subsys->ctrls); |
Christoph Hellwig | 32fd90c | 2019-05-08 09:48:27 +0200 | [diff] [blame] | 2935 | mutex_unlock(&nvme_subsystems_lock); |
Christoph Hellwig | ab9e00c | 2017-11-09 13:48:55 +0100 | [diff] [blame] | 2936 | return 0; |
| 2937 | |
Christoph Hellwig | 32fd90c | 2019-05-08 09:48:27 +0200 | [diff] [blame] | 2938 | out_put_subsystem: |
| 2939 | nvme_put_subsystem(subsys); |
Christoph Hellwig | ab9e00c | 2017-11-09 13:48:55 +0100 | [diff] [blame] | 2940 | out_unlock: |
| 2941 | mutex_unlock(&nvme_subsystems_lock); |
Christoph Hellwig | ab9e00c | 2017-11-09 13:48:55 +0100 | [diff] [blame] | 2942 | return ret; |
Christoph Hellwig | 180de007 | 2017-06-26 12:39:02 +0200 | [diff] [blame] | 2943 | } |
| 2944 | |
Keith Busch | be93e87 | 2020-06-29 12:06:40 -0700 | [diff] [blame] | 2945 | int nvme_get_log(struct nvme_ctrl *ctrl, u32 nsid, u8 log_page, u8 lsp, u8 csi, |
Christoph Hellwig | 0e98719 | 2018-06-06 14:39:00 +0200 | [diff] [blame] | 2946 | void *log, size_t size, u64 offset) |
Matias Bjørling | 70da609 | 2018-02-26 13:55:40 +0100 | [diff] [blame] | 2947 | { |
| 2948 | struct nvme_command c = { }; |
Keith Busch | 71fb90e | 2020-04-03 09:24:01 -0700 | [diff] [blame] | 2949 | u32 dwlen = nvme_bytes_to_numd(size); |
Matias Bjørling | 70da609 | 2018-02-26 13:55:40 +0100 | [diff] [blame] | 2950 | |
| 2951 | c.get_log_page.opcode = nvme_admin_get_log_page; |
Christoph Hellwig | 0e98719 | 2018-06-06 14:39:00 +0200 | [diff] [blame] | 2952 | c.get_log_page.nsid = cpu_to_le32(nsid); |
Matias Bjørling | 70da609 | 2018-02-26 13:55:40 +0100 | [diff] [blame] | 2953 | c.get_log_page.lid = log_page; |
Christoph Hellwig | 0e98719 | 2018-06-06 14:39:00 +0200 | [diff] [blame] | 2954 | c.get_log_page.lsp = lsp; |
Matias Bjørling | 70da609 | 2018-02-26 13:55:40 +0100 | [diff] [blame] | 2955 | c.get_log_page.numdl = cpu_to_le16(dwlen & ((1 << 16) - 1)); |
| 2956 | c.get_log_page.numdu = cpu_to_le16(dwlen >> 16); |
Matias Bjørling | 7ec6074 | 2018-04-12 09:16:03 -0600 | [diff] [blame] | 2957 | c.get_log_page.lpol = cpu_to_le32(lower_32_bits(offset)); |
| 2958 | c.get_log_page.lpou = cpu_to_le32(upper_32_bits(offset)); |
Keith Busch | be93e87 | 2020-06-29 12:06:40 -0700 | [diff] [blame] | 2959 | c.get_log_page.csi = csi; |
Matias Bjørling | 70da609 | 2018-02-26 13:55:40 +0100 | [diff] [blame] | 2960 | |
| 2961 | return nvme_submit_sync_cmd(ctrl->admin_q, &c, log, size); |
| 2962 | } |
| 2963 | |
Keith Busch | be93e87 | 2020-06-29 12:06:40 -0700 | [diff] [blame] | 2964 | static struct nvme_cel *nvme_find_cel(struct nvme_ctrl *ctrl, u8 csi) |
Keith Busch | 84fef62 | 2017-11-07 10:28:32 -0700 | [diff] [blame] | 2965 | { |
Keith Busch | be93e87 | 2020-06-29 12:06:40 -0700 | [diff] [blame] | 2966 | struct nvme_cel *cel, *ret = NULL; |
| 2967 | |
| 2968 | spin_lock(&ctrl->lock); |
| 2969 | list_for_each_entry(cel, &ctrl->cels, entry) { |
| 2970 | if (cel->csi == csi) { |
| 2971 | ret = cel; |
| 2972 | break; |
| 2973 | } |
| 2974 | } |
| 2975 | spin_unlock(&ctrl->lock); |
| 2976 | |
| 2977 | return ret; |
| 2978 | } |
| 2979 | |
| 2980 | static int nvme_get_effects_log(struct nvme_ctrl *ctrl, u8 csi, |
| 2981 | struct nvme_effects_log **log) |
| 2982 | { |
| 2983 | struct nvme_cel *cel = nvme_find_cel(ctrl, csi); |
Keith Busch | 84fef62 | 2017-11-07 10:28:32 -0700 | [diff] [blame] | 2984 | int ret; |
| 2985 | |
Keith Busch | be93e87 | 2020-06-29 12:06:40 -0700 | [diff] [blame] | 2986 | if (cel) |
| 2987 | goto out; |
Keith Busch | 84fef62 | 2017-11-07 10:28:32 -0700 | [diff] [blame] | 2988 | |
Keith Busch | be93e87 | 2020-06-29 12:06:40 -0700 | [diff] [blame] | 2989 | cel = kzalloc(sizeof(*cel), GFP_KERNEL); |
| 2990 | if (!cel) |
| 2991 | return -ENOMEM; |
Keith Busch | 84fef62 | 2017-11-07 10:28:32 -0700 | [diff] [blame] | 2992 | |
Keith Busch | be93e87 | 2020-06-29 12:06:40 -0700 | [diff] [blame] | 2993 | ret = nvme_get_log(ctrl, NVME_NSID_ALL, NVME_LOG_CMD_EFFECTS, 0, csi, |
| 2994 | &cel->log, sizeof(cel->log), 0); |
Keith Busch | 84fef62 | 2017-11-07 10:28:32 -0700 | [diff] [blame] | 2995 | if (ret) { |
Keith Busch | be93e87 | 2020-06-29 12:06:40 -0700 | [diff] [blame] | 2996 | kfree(cel); |
| 2997 | return ret; |
Keith Busch | 84fef62 | 2017-11-07 10:28:32 -0700 | [diff] [blame] | 2998 | } |
Keith Busch | be93e87 | 2020-06-29 12:06:40 -0700 | [diff] [blame] | 2999 | |
| 3000 | cel->csi = csi; |
| 3001 | |
| 3002 | spin_lock(&ctrl->lock); |
| 3003 | list_add_tail(&cel->entry, &ctrl->cels); |
| 3004 | spin_unlock(&ctrl->lock); |
| 3005 | out: |
| 3006 | *log = &cel->log; |
| 3007 | return 0; |
Christoph Hellwig | 21d3471 | 2015-11-26 09:08:36 +0100 | [diff] [blame] | 3008 | } |
| 3009 | |
Christoph Hellwig | 7fd8930 | 2015-11-28 15:37:52 +0100 | [diff] [blame] | 3010 | /* |
| 3011 | * Initialize the cached copies of the Identify data and various controller |
| 3012 | * register in our nvme_ctrl structure. This should be called as soon as |
| 3013 | * the admin queue is fully up and running. |
| 3014 | */ |
| 3015 | int nvme_init_identify(struct nvme_ctrl *ctrl) |
| 3016 | { |
| 3017 | struct nvme_id_ctrl *id; |
Christoph Hellwig | 7fd8930 | 2015-11-28 15:37:52 +0100 | [diff] [blame] | 3018 | int ret, page_shift; |
Christoph Hellwig | a229dbf | 2016-06-06 23:20:48 +0200 | [diff] [blame] | 3019 | u32 max_hw_sectors; |
Kai-Heng Feng | 76a5af8 | 2017-06-26 16:39:54 -0400 | [diff] [blame] | 3020 | bool prev_apst_enabled; |
Christoph Hellwig | 7fd8930 | 2015-11-28 15:37:52 +0100 | [diff] [blame] | 3021 | |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 3022 | ret = ctrl->ops->reg_read32(ctrl, NVME_REG_VS, &ctrl->vs); |
| 3023 | if (ret) { |
Sagi Grimberg | 1b3c47c | 2016-02-10 08:51:15 -0700 | [diff] [blame] | 3024 | dev_err(ctrl->device, "Reading VS failed (%d)\n", ret); |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 3025 | return ret; |
| 3026 | } |
Sagi Grimberg | 4fba445 | 2019-07-22 17:06:52 -0700 | [diff] [blame] | 3027 | page_shift = NVME_CAP_MPSMIN(ctrl->cap) + 12; |
Chaitanya Kulkarni | d4047cf | 2020-06-01 19:41:12 -0700 | [diff] [blame] | 3028 | ctrl->sqsize = min_t(u16, NVME_CAP_MQES(ctrl->cap), ctrl->sqsize); |
Christoph Hellwig | 7fd8930 | 2015-11-28 15:37:52 +0100 | [diff] [blame] | 3029 | |
Gabriel Krisman Bertazi | 8ef2074 | 2016-10-19 09:51:05 -0600 | [diff] [blame] | 3030 | if (ctrl->vs >= NVME_VS(1, 1, 0)) |
Sagi Grimberg | 4fba445 | 2019-07-22 17:06:52 -0700 | [diff] [blame] | 3031 | ctrl->subsystem = NVME_CAP_NSSRC(ctrl->cap); |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 3032 | |
Christoph Hellwig | 7fd8930 | 2015-11-28 15:37:52 +0100 | [diff] [blame] | 3033 | ret = nvme_identify_ctrl(ctrl, &id); |
| 3034 | if (ret) { |
Sagi Grimberg | 1b3c47c | 2016-02-10 08:51:15 -0700 | [diff] [blame] | 3035 | dev_err(ctrl->device, "Identify Controller failed (%d)\n", ret); |
Christoph Hellwig | 7fd8930 | 2015-11-28 15:37:52 +0100 | [diff] [blame] | 3036 | return -EIO; |
| 3037 | } |
| 3038 | |
Keith Busch | 84fef62 | 2017-11-07 10:28:32 -0700 | [diff] [blame] | 3039 | if (id->lpa & NVME_CTRL_LPA_CMD_EFFECTS_LOG) { |
Keith Busch | be93e87 | 2020-06-29 12:06:40 -0700 | [diff] [blame] | 3040 | ret = nvme_get_effects_log(ctrl, NVME_CSI_NVM, &ctrl->effects); |
Keith Busch | 84fef62 | 2017-11-07 10:28:32 -0700 | [diff] [blame] | 3041 | if (ret < 0) |
Hannes Reinecke | 75c8b19 | 2018-05-25 11:06:27 +0200 | [diff] [blame] | 3042 | goto out_free; |
Keith Busch | 84fef62 | 2017-11-07 10:28:32 -0700 | [diff] [blame] | 3043 | } |
Christoph Hellwig | 180de007 | 2017-06-26 12:39:02 +0200 | [diff] [blame] | 3044 | |
Guilherme G. Piccoli | a89fcca | 2019-08-14 11:26:10 -0300 | [diff] [blame] | 3045 | if (!(ctrl->ops->flags & NVME_F_FABRICS)) |
| 3046 | ctrl->cntlid = le16_to_cpu(id->cntlid); |
| 3047 | |
Andy Lutomirski | bd4da3a | 2017-02-22 13:32:36 -0700 | [diff] [blame] | 3048 | if (!ctrl->identified) { |
Christoph Hellwig | ab9e00c | 2017-11-09 13:48:55 +0100 | [diff] [blame] | 3049 | int i; |
| 3050 | |
| 3051 | ret = nvme_init_subsystem(ctrl, id); |
| 3052 | if (ret) |
| 3053 | goto out_free; |
| 3054 | |
Andy Lutomirski | bd4da3a | 2017-02-22 13:32:36 -0700 | [diff] [blame] | 3055 | /* |
| 3056 | * Check for quirks. Quirk can depend on firmware version, |
| 3057 | * so, in principle, the set of quirks present can change |
| 3058 | * across a reset. As a possible future enhancement, we |
| 3059 | * could re-scan for quirks every time we reinitialize |
| 3060 | * the device, but we'd have to make sure that the driver |
| 3061 | * behaves intelligently if the quirks change. |
| 3062 | */ |
Andy Lutomirski | bd4da3a | 2017-02-22 13:32:36 -0700 | [diff] [blame] | 3063 | for (i = 0; i < ARRAY_SIZE(core_quirks); i++) { |
| 3064 | if (quirk_matches(id, &core_quirks[i])) |
| 3065 | ctrl->quirks |= core_quirks[i].quirks; |
| 3066 | } |
| 3067 | } |
| 3068 | |
Andy Lutomirski | c35e30b | 2017-04-21 16:19:24 -0700 | [diff] [blame] | 3069 | if (force_apst && (ctrl->quirks & NVME_QUIRK_NO_DEEPEST_PS)) { |
Johannes Thumshirn | f0425db | 2017-06-09 16:17:21 +0200 | [diff] [blame] | 3070 | dev_warn(ctrl->device, "forcibly allowing all power states due to nvme_core.force_apst -- use at your own risk\n"); |
Andy Lutomirski | c35e30b | 2017-04-21 16:19:24 -0700 | [diff] [blame] | 3071 | ctrl->quirks &= ~NVME_QUIRK_NO_DEEPEST_PS; |
| 3072 | } |
| 3073 | |
Keith Busch | 49cd84b | 2018-11-27 09:40:57 -0700 | [diff] [blame] | 3074 | ctrl->crdt[0] = le16_to_cpu(id->crdt1); |
| 3075 | ctrl->crdt[1] = le16_to_cpu(id->crdt2); |
| 3076 | ctrl->crdt[2] = le16_to_cpu(id->crdt3); |
| 3077 | |
Scott Bauer | 8a9ae52 | 2017-02-17 13:59:40 +0100 | [diff] [blame] | 3078 | ctrl->oacs = le16_to_cpu(id->oacs); |
Max Gurtovoy | 43e2d08 | 2019-02-25 13:00:04 +0200 | [diff] [blame] | 3079 | ctrl->oncs = le16_to_cpu(id->oncs); |
Laine Walker-Avina | 2d466c7 | 2019-05-20 10:13:04 -0700 | [diff] [blame] | 3080 | ctrl->mtfa = le16_to_cpu(id->mtfa); |
Hannes Reinecke | c0561f8 | 2018-05-22 11:09:55 +0200 | [diff] [blame] | 3081 | ctrl->oaes = le32_to_cpu(id->oaes); |
Guenter Roeck | 400b6a7 | 2019-11-06 06:35:18 -0800 | [diff] [blame] | 3082 | ctrl->wctemp = le16_to_cpu(id->wctemp); |
| 3083 | ctrl->cctemp = le16_to_cpu(id->cctemp); |
| 3084 | |
Christoph Hellwig | 6bf25d1 | 2015-11-20 09:36:44 +0100 | [diff] [blame] | 3085 | atomic_set(&ctrl->abort_limit, id->acl + 1); |
Christoph Hellwig | 7fd8930 | 2015-11-28 15:37:52 +0100 | [diff] [blame] | 3086 | ctrl->vwc = id->vwc; |
Christoph Hellwig | 7fd8930 | 2015-11-28 15:37:52 +0100 | [diff] [blame] | 3087 | if (id->mdts) |
Christoph Hellwig | a229dbf | 2016-06-06 23:20:48 +0200 | [diff] [blame] | 3088 | max_hw_sectors = 1 << (id->mdts + page_shift - 9); |
Christoph Hellwig | 7fd8930 | 2015-11-28 15:37:52 +0100 | [diff] [blame] | 3089 | else |
Christoph Hellwig | a229dbf | 2016-06-06 23:20:48 +0200 | [diff] [blame] | 3090 | max_hw_sectors = UINT_MAX; |
| 3091 | ctrl->max_hw_sectors = |
| 3092 | min_not_zero(ctrl->max_hw_sectors, max_hw_sectors); |
Christoph Hellwig | 7fd8930 | 2015-11-28 15:37:52 +0100 | [diff] [blame] | 3093 | |
Christoph Hellwig | da35825 | 2016-03-02 18:07:11 +0100 | [diff] [blame] | 3094 | nvme_set_queue_limits(ctrl, ctrl->admin_q); |
Christoph Hellwig | 07bfcd0 | 2016-06-13 16:45:26 +0200 | [diff] [blame] | 3095 | ctrl->sgls = le32_to_cpu(id->sgls); |
Sagi Grimberg | 038bd4c | 2016-06-13 16:45:28 +0200 | [diff] [blame] | 3096 | ctrl->kas = le16_to_cpu(id->kas); |
Christoph Hellwig | 0d0b660 | 2018-05-14 08:48:54 +0200 | [diff] [blame] | 3097 | ctrl->max_namespaces = le32_to_cpu(id->mnan); |
Sagi Grimberg | 3e53ba38 | 2018-11-02 10:28:14 -0700 | [diff] [blame] | 3098 | ctrl->ctratt = le32_to_cpu(id->ctratt); |
Christoph Hellwig | 07bfcd0 | 2016-06-13 16:45:26 +0200 | [diff] [blame] | 3099 | |
Martin K. Petersen | 07fbd32 | 2017-08-25 19:14:50 -0400 | [diff] [blame] | 3100 | if (id->rtd3e) { |
| 3101 | /* us -> s */ |
Baolin Wang | f5af577 | 2020-06-24 14:49:58 +0800 | [diff] [blame] | 3102 | u32 transition_time = le32_to_cpu(id->rtd3e) / USEC_PER_SEC; |
Martin K. Petersen | 07fbd32 | 2017-08-25 19:14:50 -0400 | [diff] [blame] | 3103 | |
| 3104 | ctrl->shutdown_timeout = clamp_t(unsigned int, transition_time, |
| 3105 | shutdown_timeout, 60); |
| 3106 | |
| 3107 | if (ctrl->shutdown_timeout != shutdown_timeout) |
Max Gurtovoy | 1a3838d | 2017-12-31 15:33:27 +0200 | [diff] [blame] | 3108 | dev_info(ctrl->device, |
Martin K. Petersen | 07fbd32 | 2017-08-25 19:14:50 -0400 | [diff] [blame] | 3109 | "Shutdown timeout set to %u seconds\n", |
| 3110 | ctrl->shutdown_timeout); |
| 3111 | } else |
| 3112 | ctrl->shutdown_timeout = shutdown_timeout; |
| 3113 | |
Andy Lutomirski | c5552fd | 2017-02-07 10:08:45 -0800 | [diff] [blame] | 3114 | ctrl->npss = id->npss; |
Kai-Heng Feng | 76a5af8 | 2017-06-26 16:39:54 -0400 | [diff] [blame] | 3115 | ctrl->apsta = id->apsta; |
| 3116 | prev_apst_enabled = ctrl->apst_enabled; |
Andy Lutomirski | c35e30b | 2017-04-21 16:19:24 -0700 | [diff] [blame] | 3117 | if (ctrl->quirks & NVME_QUIRK_NO_APST) { |
| 3118 | if (force_apst && id->apsta) { |
Johannes Thumshirn | f0425db | 2017-06-09 16:17:21 +0200 | [diff] [blame] | 3119 | dev_warn(ctrl->device, "forcibly allowing APST due to nvme_core.force_apst -- use at your own risk\n"); |
Kai-Heng Feng | 76a5af8 | 2017-06-26 16:39:54 -0400 | [diff] [blame] | 3120 | ctrl->apst_enabled = true; |
Andy Lutomirski | c35e30b | 2017-04-21 16:19:24 -0700 | [diff] [blame] | 3121 | } else { |
Kai-Heng Feng | 76a5af8 | 2017-06-26 16:39:54 -0400 | [diff] [blame] | 3122 | ctrl->apst_enabled = false; |
Andy Lutomirski | c35e30b | 2017-04-21 16:19:24 -0700 | [diff] [blame] | 3123 | } |
| 3124 | } else { |
Kai-Heng Feng | 76a5af8 | 2017-06-26 16:39:54 -0400 | [diff] [blame] | 3125 | ctrl->apst_enabled = id->apsta; |
Andy Lutomirski | c35e30b | 2017-04-21 16:19:24 -0700 | [diff] [blame] | 3126 | } |
Andy Lutomirski | c5552fd | 2017-02-07 10:08:45 -0800 | [diff] [blame] | 3127 | memcpy(ctrl->psd, id->psd, sizeof(ctrl->psd)); |
| 3128 | |
Christoph Hellwig | d3d5b87 | 2017-05-20 15:14:44 +0200 | [diff] [blame] | 3129 | if (ctrl->ops->flags & NVME_F_FABRICS) { |
Christoph Hellwig | 07bfcd0 | 2016-06-13 16:45:26 +0200 | [diff] [blame] | 3130 | ctrl->icdoff = le16_to_cpu(id->icdoff); |
| 3131 | ctrl->ioccsz = le32_to_cpu(id->ioccsz); |
| 3132 | ctrl->iorcsz = le32_to_cpu(id->iorcsz); |
| 3133 | ctrl->maxcmd = le16_to_cpu(id->maxcmd); |
| 3134 | |
| 3135 | /* |
| 3136 | * In fabrics we need to verify the cntlid matches the |
| 3137 | * admin connect |
| 3138 | */ |
Keith Busch | 634b832 | 2017-08-10 11:23:31 +0200 | [diff] [blame] | 3139 | if (ctrl->cntlid != le16_to_cpu(id->cntlid)) { |
James Smart | a8157ff | 2019-11-21 09:58:10 -0800 | [diff] [blame] | 3140 | dev_err(ctrl->device, |
| 3141 | "Mismatching cntlid: Connect %u vs Identify " |
| 3142 | "%u, rejecting\n", |
| 3143 | ctrl->cntlid, le16_to_cpu(id->cntlid)); |
Christoph Hellwig | 07bfcd0 | 2016-06-13 16:45:26 +0200 | [diff] [blame] | 3144 | ret = -EINVAL; |
Keith Busch | 634b832 | 2017-08-10 11:23:31 +0200 | [diff] [blame] | 3145 | goto out_free; |
| 3146 | } |
Sagi Grimberg | 038bd4c | 2016-06-13 16:45:28 +0200 | [diff] [blame] | 3147 | |
| 3148 | if (!ctrl->opts->discovery_nqn && !ctrl->kas) { |
Johannes Thumshirn | f0425db | 2017-06-09 16:17:21 +0200 | [diff] [blame] | 3149 | dev_err(ctrl->device, |
Sagi Grimberg | 038bd4c | 2016-06-13 16:45:28 +0200 | [diff] [blame] | 3150 | "keep-alive support is mandatory for fabrics\n"); |
| 3151 | ret = -EINVAL; |
Keith Busch | 634b832 | 2017-08-10 11:23:31 +0200 | [diff] [blame] | 3152 | goto out_free; |
Sagi Grimberg | 038bd4c | 2016-06-13 16:45:28 +0200 | [diff] [blame] | 3153 | } |
Christoph Hellwig | 07bfcd0 | 2016-06-13 16:45:26 +0200 | [diff] [blame] | 3154 | } else { |
Christoph Hellwig | fe6d53c | 2017-05-12 17:16:10 +0200 | [diff] [blame] | 3155 | ctrl->hmpre = le32_to_cpu(id->hmpre); |
| 3156 | ctrl->hmmin = le32_to_cpu(id->hmmin); |
Christoph Hellwig | 044a9df | 2017-09-11 12:09:28 -0400 | [diff] [blame] | 3157 | ctrl->hmminds = le32_to_cpu(id->hmminds); |
| 3158 | ctrl->hmmaxd = le16_to_cpu(id->hmmaxd); |
Christoph Hellwig | 07bfcd0 | 2016-06-13 16:45:26 +0200 | [diff] [blame] | 3159 | } |
Christoph Hellwig | da35825 | 2016-03-02 18:07:11 +0100 | [diff] [blame] | 3160 | |
Christoph Hellwig | 0d0b660 | 2018-05-14 08:48:54 +0200 | [diff] [blame] | 3161 | ret = nvme_mpath_init(ctrl, id); |
Christoph Hellwig | 7fd8930 | 2015-11-28 15:37:52 +0100 | [diff] [blame] | 3162 | kfree(id); |
Andy Lutomirski | bd4da3a | 2017-02-22 13:32:36 -0700 | [diff] [blame] | 3163 | |
Christoph Hellwig | 0d0b660 | 2018-05-14 08:48:54 +0200 | [diff] [blame] | 3164 | if (ret < 0) |
| 3165 | return ret; |
| 3166 | |
Kai-Heng Feng | 76a5af8 | 2017-06-26 16:39:54 -0400 | [diff] [blame] | 3167 | if (ctrl->apst_enabled && !prev_apst_enabled) |
Andy Lutomirski | c5552fd | 2017-02-07 10:08:45 -0800 | [diff] [blame] | 3168 | dev_pm_qos_expose_latency_tolerance(ctrl->device); |
Kai-Heng Feng | 76a5af8 | 2017-06-26 16:39:54 -0400 | [diff] [blame] | 3169 | else if (!ctrl->apst_enabled && prev_apst_enabled) |
Andy Lutomirski | c5552fd | 2017-02-07 10:08:45 -0800 | [diff] [blame] | 3170 | dev_pm_qos_hide_latency_tolerance(ctrl->device); |
| 3171 | |
Keith Busch | 634b832 | 2017-08-10 11:23:31 +0200 | [diff] [blame] | 3172 | ret = nvme_configure_apst(ctrl); |
| 3173 | if (ret < 0) |
| 3174 | return ret; |
Jon Derrick | dbf86b3 | 2017-08-16 09:51:29 +0200 | [diff] [blame] | 3175 | |
| 3176 | ret = nvme_configure_timestamp(ctrl); |
| 3177 | if (ret < 0) |
| 3178 | return ret; |
Keith Busch | 634b832 | 2017-08-10 11:23:31 +0200 | [diff] [blame] | 3179 | |
| 3180 | ret = nvme_configure_directives(ctrl); |
| 3181 | if (ret < 0) |
| 3182 | return ret; |
Andy Lutomirski | c5552fd | 2017-02-07 10:08:45 -0800 | [diff] [blame] | 3183 | |
Keith Busch | 49cd84b | 2018-11-27 09:40:57 -0700 | [diff] [blame] | 3184 | ret = nvme_configure_acre(ctrl); |
| 3185 | if (ret < 0) |
| 3186 | return ret; |
| 3187 | |
Guenter Roeck | 400b6a7 | 2019-11-06 06:35:18 -0800 | [diff] [blame] | 3188 | if (!ctrl->identified) |
| 3189 | nvme_hwmon_init(ctrl); |
| 3190 | |
Andy Lutomirski | bd4da3a | 2017-02-22 13:32:36 -0700 | [diff] [blame] | 3191 | ctrl->identified = true; |
Andy Lutomirski | c5552fd | 2017-02-07 10:08:45 -0800 | [diff] [blame] | 3192 | |
Keith Busch | 634b832 | 2017-08-10 11:23:31 +0200 | [diff] [blame] | 3193 | return 0; |
| 3194 | |
| 3195 | out_free: |
| 3196 | kfree(id); |
Christoph Hellwig | 07bfcd0 | 2016-06-13 16:45:26 +0200 | [diff] [blame] | 3197 | return ret; |
Christoph Hellwig | 7fd8930 | 2015-11-28 15:37:52 +0100 | [diff] [blame] | 3198 | } |
Ming Lin | 576d55d | 2016-02-10 10:03:32 -0800 | [diff] [blame] | 3199 | EXPORT_SYMBOL_GPL(nvme_init_identify); |
Christoph Hellwig | 7fd8930 | 2015-11-28 15:37:52 +0100 | [diff] [blame] | 3200 | |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 3201 | static int nvme_dev_open(struct inode *inode, struct file *file) |
Christoph Hellwig | 21d3471 | 2015-11-26 09:08:36 +0100 | [diff] [blame] | 3202 | { |
Christoph Hellwig | a6a5149 | 2017-10-18 16:59:25 +0200 | [diff] [blame] | 3203 | struct nvme_ctrl *ctrl = |
| 3204 | container_of(inode->i_cdev, struct nvme_ctrl, cdev); |
Christoph Hellwig | 21d3471 | 2015-11-26 09:08:36 +0100 | [diff] [blame] | 3205 | |
Jianchao Wang | 2b1b7e7 | 2018-01-06 08:01:58 +0800 | [diff] [blame] | 3206 | switch (ctrl->state) { |
| 3207 | case NVME_CTRL_LIVE: |
Jianchao Wang | 2b1b7e7 | 2018-01-06 08:01:58 +0800 | [diff] [blame] | 3208 | break; |
| 3209 | default: |
Christoph Hellwig | a6a5149 | 2017-10-18 16:59:25 +0200 | [diff] [blame] | 3210 | return -EWOULDBLOCK; |
Jianchao Wang | 2b1b7e7 | 2018-01-06 08:01:58 +0800 | [diff] [blame] | 3211 | } |
| 3212 | |
Christoph Hellwig | a6a5149 | 2017-10-18 16:59:25 +0200 | [diff] [blame] | 3213 | file->private_data = ctrl; |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 3214 | return 0; |
Christoph Hellwig | 21d3471 | 2015-11-26 09:08:36 +0100 | [diff] [blame] | 3215 | } |
| 3216 | |
Christoph Hellwig | bfd8947 | 2015-12-24 15:27:01 +0100 | [diff] [blame] | 3217 | static int nvme_dev_user_cmd(struct nvme_ctrl *ctrl, void __user *argp) |
| 3218 | { |
| 3219 | struct nvme_ns *ns; |
| 3220 | int ret; |
| 3221 | |
Jianchao Wang | 765cc031 | 2018-02-12 20:54:46 +0800 | [diff] [blame] | 3222 | down_read(&ctrl->namespaces_rwsem); |
Christoph Hellwig | bfd8947 | 2015-12-24 15:27:01 +0100 | [diff] [blame] | 3223 | if (list_empty(&ctrl->namespaces)) { |
| 3224 | ret = -ENOTTY; |
| 3225 | goto out_unlock; |
| 3226 | } |
| 3227 | |
| 3228 | ns = list_first_entry(&ctrl->namespaces, struct nvme_ns, list); |
| 3229 | if (ns != list_last_entry(&ctrl->namespaces, struct nvme_ns, list)) { |
Sagi Grimberg | 1b3c47c | 2016-02-10 08:51:15 -0700 | [diff] [blame] | 3230 | dev_warn(ctrl->device, |
Christoph Hellwig | bfd8947 | 2015-12-24 15:27:01 +0100 | [diff] [blame] | 3231 | "NVME_IOCTL_IO_CMD not supported when multiple namespaces present!\n"); |
| 3232 | ret = -EINVAL; |
| 3233 | goto out_unlock; |
| 3234 | } |
| 3235 | |
Sagi Grimberg | 1b3c47c | 2016-02-10 08:51:15 -0700 | [diff] [blame] | 3236 | dev_warn(ctrl->device, |
Christoph Hellwig | bfd8947 | 2015-12-24 15:27:01 +0100 | [diff] [blame] | 3237 | "using deprecated NVME_IOCTL_IO_CMD ioctl on the char device!\n"); |
| 3238 | kref_get(&ns->kref); |
Jianchao Wang | 765cc031 | 2018-02-12 20:54:46 +0800 | [diff] [blame] | 3239 | up_read(&ctrl->namespaces_rwsem); |
Christoph Hellwig | bfd8947 | 2015-12-24 15:27:01 +0100 | [diff] [blame] | 3240 | |
| 3241 | ret = nvme_user_cmd(ctrl, ns, argp); |
| 3242 | nvme_put_ns(ns); |
| 3243 | return ret; |
| 3244 | |
| 3245 | out_unlock: |
Jianchao Wang | 765cc031 | 2018-02-12 20:54:46 +0800 | [diff] [blame] | 3246 | up_read(&ctrl->namespaces_rwsem); |
Christoph Hellwig | bfd8947 | 2015-12-24 15:27:01 +0100 | [diff] [blame] | 3247 | return ret; |
| 3248 | } |
| 3249 | |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 3250 | static long nvme_dev_ioctl(struct file *file, unsigned int cmd, |
| 3251 | unsigned long arg) |
| 3252 | { |
| 3253 | struct nvme_ctrl *ctrl = file->private_data; |
| 3254 | void __user *argp = (void __user *)arg; |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 3255 | |
| 3256 | switch (cmd) { |
| 3257 | case NVME_IOCTL_ADMIN_CMD: |
| 3258 | return nvme_user_cmd(ctrl, NULL, argp); |
Marta Rybczynska | 65e68ed | 2019-09-24 15:14:52 +0200 | [diff] [blame] | 3259 | case NVME_IOCTL_ADMIN64_CMD: |
| 3260 | return nvme_user_cmd64(ctrl, NULL, argp); |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 3261 | case NVME_IOCTL_IO_CMD: |
Christoph Hellwig | bfd8947 | 2015-12-24 15:27:01 +0100 | [diff] [blame] | 3262 | return nvme_dev_user_cmd(ctrl, argp); |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 3263 | case NVME_IOCTL_RESET: |
Sagi Grimberg | 1b3c47c | 2016-02-10 08:51:15 -0700 | [diff] [blame] | 3264 | dev_warn(ctrl->device, "resetting controller\n"); |
Christoph Hellwig | d86c4d8 | 2017-06-15 15:41:08 +0200 | [diff] [blame] | 3265 | return nvme_reset_ctrl_sync(ctrl); |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 3266 | case NVME_IOCTL_SUBSYS_RESET: |
| 3267 | return nvme_reset_subsystem(ctrl); |
Keith Busch | 9ec3bb2 | 2016-04-29 15:45:18 -0600 | [diff] [blame] | 3268 | case NVME_IOCTL_RESCAN: |
| 3269 | nvme_queue_scan(ctrl); |
| 3270 | return 0; |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 3271 | default: |
| 3272 | return -ENOTTY; |
| 3273 | } |
| 3274 | } |
| 3275 | |
| 3276 | static const struct file_operations nvme_dev_fops = { |
| 3277 | .owner = THIS_MODULE, |
| 3278 | .open = nvme_dev_open, |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 3279 | .unlocked_ioctl = nvme_dev_ioctl, |
Arnd Bergmann | 1832f2d | 2018-09-11 21:59:08 +0200 | [diff] [blame] | 3280 | .compat_ioctl = compat_ptr_ioctl, |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 3281 | }; |
| 3282 | |
| 3283 | static ssize_t nvme_sysfs_reset(struct device *dev, |
| 3284 | struct device_attribute *attr, const char *buf, |
| 3285 | size_t count) |
| 3286 | { |
| 3287 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); |
| 3288 | int ret; |
| 3289 | |
Christoph Hellwig | d86c4d8 | 2017-06-15 15:41:08 +0200 | [diff] [blame] | 3290 | ret = nvme_reset_ctrl_sync(ctrl); |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 3291 | if (ret < 0) |
| 3292 | return ret; |
| 3293 | return count; |
| 3294 | } |
| 3295 | static DEVICE_ATTR(reset_controller, S_IWUSR, NULL, nvme_sysfs_reset); |
| 3296 | |
Keith Busch | 9ec3bb2 | 2016-04-29 15:45:18 -0600 | [diff] [blame] | 3297 | static ssize_t nvme_sysfs_rescan(struct device *dev, |
| 3298 | struct device_attribute *attr, const char *buf, |
| 3299 | size_t count) |
| 3300 | { |
| 3301 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); |
| 3302 | |
| 3303 | nvme_queue_scan(ctrl); |
| 3304 | return count; |
| 3305 | } |
| 3306 | static DEVICE_ATTR(rescan_controller, S_IWUSR, NULL, nvme_sysfs_rescan); |
| 3307 | |
Christoph Hellwig | 5b85b82 | 2017-11-09 13:51:03 +0100 | [diff] [blame] | 3308 | static inline struct nvme_ns_head *dev_to_ns_head(struct device *dev) |
Keith Busch | 118472a | 2016-02-18 09:57:48 -0700 | [diff] [blame] | 3309 | { |
Christoph Hellwig | 5b85b82 | 2017-11-09 13:51:03 +0100 | [diff] [blame] | 3310 | struct gendisk *disk = dev_to_disk(dev); |
Keith Busch | 118472a | 2016-02-18 09:57:48 -0700 | [diff] [blame] | 3311 | |
Christoph Hellwig | 5b85b82 | 2017-11-09 13:51:03 +0100 | [diff] [blame] | 3312 | if (disk->fops == &nvme_fops) |
| 3313 | return nvme_get_ns_from_dev(dev)->head; |
| 3314 | else |
| 3315 | return disk->private_data; |
| 3316 | } |
Johannes Thumshirn | 6484f5d | 2017-07-12 15:38:56 +0200 | [diff] [blame] | 3317 | |
Christoph Hellwig | 5b85b82 | 2017-11-09 13:51:03 +0100 | [diff] [blame] | 3318 | static ssize_t wwid_show(struct device *dev, struct device_attribute *attr, |
| 3319 | char *buf) |
| 3320 | { |
| 3321 | struct nvme_ns_head *head = dev_to_ns_head(dev); |
| 3322 | struct nvme_ns_ids *ids = &head->ids; |
| 3323 | struct nvme_subsystem *subsys = head->subsys; |
Christoph Hellwig | ab9e00c | 2017-11-09 13:48:55 +0100 | [diff] [blame] | 3324 | int serial_len = sizeof(subsys->serial); |
| 3325 | int model_len = sizeof(subsys->model); |
Keith Busch | 118472a | 2016-02-18 09:57:48 -0700 | [diff] [blame] | 3326 | |
Christoph Hellwig | 002fab0 | 2017-11-09 13:50:16 +0100 | [diff] [blame] | 3327 | if (!uuid_is_null(&ids->uuid)) |
| 3328 | return sprintf(buf, "uuid.%pU\n", &ids->uuid); |
Keith Busch | 118472a | 2016-02-18 09:57:48 -0700 | [diff] [blame] | 3329 | |
Christoph Hellwig | 002fab0 | 2017-11-09 13:50:16 +0100 | [diff] [blame] | 3330 | if (memchr_inv(ids->nguid, 0, sizeof(ids->nguid))) |
| 3331 | return sprintf(buf, "eui.%16phN\n", ids->nguid); |
Keith Busch | 118472a | 2016-02-18 09:57:48 -0700 | [diff] [blame] | 3332 | |
Christoph Hellwig | 002fab0 | 2017-11-09 13:50:16 +0100 | [diff] [blame] | 3333 | if (memchr_inv(ids->eui64, 0, sizeof(ids->eui64))) |
| 3334 | return sprintf(buf, "eui.%8phN\n", ids->eui64); |
Keith Busch | 118472a | 2016-02-18 09:57:48 -0700 | [diff] [blame] | 3335 | |
Christoph Hellwig | ab9e00c | 2017-11-09 13:48:55 +0100 | [diff] [blame] | 3336 | while (serial_len > 0 && (subsys->serial[serial_len - 1] == ' ' || |
| 3337 | subsys->serial[serial_len - 1] == '\0')) |
Keith Busch | 118472a | 2016-02-18 09:57:48 -0700 | [diff] [blame] | 3338 | serial_len--; |
Christoph Hellwig | ab9e00c | 2017-11-09 13:48:55 +0100 | [diff] [blame] | 3339 | while (model_len > 0 && (subsys->model[model_len - 1] == ' ' || |
| 3340 | subsys->model[model_len - 1] == '\0')) |
Keith Busch | 118472a | 2016-02-18 09:57:48 -0700 | [diff] [blame] | 3341 | model_len--; |
| 3342 | |
Christoph Hellwig | ab9e00c | 2017-11-09 13:48:55 +0100 | [diff] [blame] | 3343 | return sprintf(buf, "nvme.%04x-%*phN-%*phN-%08x\n", subsys->vendor_id, |
| 3344 | serial_len, subsys->serial, model_len, subsys->model, |
Christoph Hellwig | 5b85b82 | 2017-11-09 13:51:03 +0100 | [diff] [blame] | 3345 | head->ns_id); |
Keith Busch | 118472a | 2016-02-18 09:57:48 -0700 | [diff] [blame] | 3346 | } |
Joe Perches | c828a89 | 2017-12-19 10:15:08 -0800 | [diff] [blame] | 3347 | static DEVICE_ATTR_RO(wwid); |
Keith Busch | 118472a | 2016-02-18 09:57:48 -0700 | [diff] [blame] | 3348 | |
Johannes Thumshirn | d934f98 | 2017-06-07 11:45:35 +0200 | [diff] [blame] | 3349 | static ssize_t nguid_show(struct device *dev, struct device_attribute *attr, |
Christoph Hellwig | 5b85b82 | 2017-11-09 13:51:03 +0100 | [diff] [blame] | 3350 | char *buf) |
Johannes Thumshirn | d934f98 | 2017-06-07 11:45:35 +0200 | [diff] [blame] | 3351 | { |
Christoph Hellwig | 5b85b82 | 2017-11-09 13:51:03 +0100 | [diff] [blame] | 3352 | return sprintf(buf, "%pU\n", dev_to_ns_head(dev)->ids.nguid); |
Johannes Thumshirn | d934f98 | 2017-06-07 11:45:35 +0200 | [diff] [blame] | 3353 | } |
Joe Perches | c828a89 | 2017-12-19 10:15:08 -0800 | [diff] [blame] | 3354 | static DEVICE_ATTR_RO(nguid); |
Johannes Thumshirn | d934f98 | 2017-06-07 11:45:35 +0200 | [diff] [blame] | 3355 | |
Keith Busch | 2b9b6e8 | 2015-12-22 10:10:45 -0700 | [diff] [blame] | 3356 | static ssize_t uuid_show(struct device *dev, struct device_attribute *attr, |
Christoph Hellwig | 5b85b82 | 2017-11-09 13:51:03 +0100 | [diff] [blame] | 3357 | char *buf) |
Keith Busch | 2b9b6e8 | 2015-12-22 10:10:45 -0700 | [diff] [blame] | 3358 | { |
Christoph Hellwig | 5b85b82 | 2017-11-09 13:51:03 +0100 | [diff] [blame] | 3359 | struct nvme_ns_ids *ids = &dev_to_ns_head(dev)->ids; |
Johannes Thumshirn | d934f98 | 2017-06-07 11:45:35 +0200 | [diff] [blame] | 3360 | |
| 3361 | /* For backward compatibility expose the NGUID to userspace if |
| 3362 | * we have no UUID set |
| 3363 | */ |
Christoph Hellwig | 002fab0 | 2017-11-09 13:50:16 +0100 | [diff] [blame] | 3364 | if (uuid_is_null(&ids->uuid)) { |
Johannes Thumshirn | d934f98 | 2017-06-07 11:45:35 +0200 | [diff] [blame] | 3365 | printk_ratelimited(KERN_WARNING |
| 3366 | "No UUID available providing old NGUID\n"); |
Christoph Hellwig | 002fab0 | 2017-11-09 13:50:16 +0100 | [diff] [blame] | 3367 | return sprintf(buf, "%pU\n", ids->nguid); |
Johannes Thumshirn | d934f98 | 2017-06-07 11:45:35 +0200 | [diff] [blame] | 3368 | } |
Christoph Hellwig | 002fab0 | 2017-11-09 13:50:16 +0100 | [diff] [blame] | 3369 | return sprintf(buf, "%pU\n", &ids->uuid); |
Keith Busch | 2b9b6e8 | 2015-12-22 10:10:45 -0700 | [diff] [blame] | 3370 | } |
Joe Perches | c828a89 | 2017-12-19 10:15:08 -0800 | [diff] [blame] | 3371 | static DEVICE_ATTR_RO(uuid); |
Keith Busch | 2b9b6e8 | 2015-12-22 10:10:45 -0700 | [diff] [blame] | 3372 | |
| 3373 | static ssize_t eui_show(struct device *dev, struct device_attribute *attr, |
Christoph Hellwig | 5b85b82 | 2017-11-09 13:51:03 +0100 | [diff] [blame] | 3374 | char *buf) |
Keith Busch | 2b9b6e8 | 2015-12-22 10:10:45 -0700 | [diff] [blame] | 3375 | { |
Christoph Hellwig | 5b85b82 | 2017-11-09 13:51:03 +0100 | [diff] [blame] | 3376 | return sprintf(buf, "%8ph\n", dev_to_ns_head(dev)->ids.eui64); |
Keith Busch | 2b9b6e8 | 2015-12-22 10:10:45 -0700 | [diff] [blame] | 3377 | } |
Joe Perches | c828a89 | 2017-12-19 10:15:08 -0800 | [diff] [blame] | 3378 | static DEVICE_ATTR_RO(eui); |
Keith Busch | 2b9b6e8 | 2015-12-22 10:10:45 -0700 | [diff] [blame] | 3379 | |
| 3380 | static ssize_t nsid_show(struct device *dev, struct device_attribute *attr, |
Christoph Hellwig | 5b85b82 | 2017-11-09 13:51:03 +0100 | [diff] [blame] | 3381 | char *buf) |
Keith Busch | 2b9b6e8 | 2015-12-22 10:10:45 -0700 | [diff] [blame] | 3382 | { |
Christoph Hellwig | 5b85b82 | 2017-11-09 13:51:03 +0100 | [diff] [blame] | 3383 | return sprintf(buf, "%d\n", dev_to_ns_head(dev)->ns_id); |
Keith Busch | 2b9b6e8 | 2015-12-22 10:10:45 -0700 | [diff] [blame] | 3384 | } |
Joe Perches | c828a89 | 2017-12-19 10:15:08 -0800 | [diff] [blame] | 3385 | static DEVICE_ATTR_RO(nsid); |
Keith Busch | 2b9b6e8 | 2015-12-22 10:10:45 -0700 | [diff] [blame] | 3386 | |
Christoph Hellwig | 5b85b82 | 2017-11-09 13:51:03 +0100 | [diff] [blame] | 3387 | static struct attribute *nvme_ns_id_attrs[] = { |
Keith Busch | 118472a | 2016-02-18 09:57:48 -0700 | [diff] [blame] | 3388 | &dev_attr_wwid.attr, |
Keith Busch | 2b9b6e8 | 2015-12-22 10:10:45 -0700 | [diff] [blame] | 3389 | &dev_attr_uuid.attr, |
Johannes Thumshirn | d934f98 | 2017-06-07 11:45:35 +0200 | [diff] [blame] | 3390 | &dev_attr_nguid.attr, |
Keith Busch | 2b9b6e8 | 2015-12-22 10:10:45 -0700 | [diff] [blame] | 3391 | &dev_attr_eui.attr, |
| 3392 | &dev_attr_nsid.attr, |
Christoph Hellwig | 0d0b660 | 2018-05-14 08:48:54 +0200 | [diff] [blame] | 3393 | #ifdef CONFIG_NVME_MULTIPATH |
| 3394 | &dev_attr_ana_grpid.attr, |
| 3395 | &dev_attr_ana_state.attr, |
| 3396 | #endif |
Keith Busch | 2b9b6e8 | 2015-12-22 10:10:45 -0700 | [diff] [blame] | 3397 | NULL, |
| 3398 | }; |
| 3399 | |
Christoph Hellwig | 5b85b82 | 2017-11-09 13:51:03 +0100 | [diff] [blame] | 3400 | static umode_t nvme_ns_id_attrs_are_visible(struct kobject *kobj, |
Keith Busch | 2b9b6e8 | 2015-12-22 10:10:45 -0700 | [diff] [blame] | 3401 | struct attribute *a, int n) |
| 3402 | { |
| 3403 | struct device *dev = container_of(kobj, struct device, kobj); |
Christoph Hellwig | 5b85b82 | 2017-11-09 13:51:03 +0100 | [diff] [blame] | 3404 | struct nvme_ns_ids *ids = &dev_to_ns_head(dev)->ids; |
Keith Busch | 2b9b6e8 | 2015-12-22 10:10:45 -0700 | [diff] [blame] | 3405 | |
| 3406 | if (a == &dev_attr_uuid.attr) { |
Martin Wilck | a04b5de | 2017-09-28 21:33:23 +0200 | [diff] [blame] | 3407 | if (uuid_is_null(&ids->uuid) && |
Christoph Hellwig | 002fab0 | 2017-11-09 13:50:16 +0100 | [diff] [blame] | 3408 | !memchr_inv(ids->nguid, 0, sizeof(ids->nguid))) |
Johannes Thumshirn | d934f98 | 2017-06-07 11:45:35 +0200 | [diff] [blame] | 3409 | return 0; |
| 3410 | } |
| 3411 | if (a == &dev_attr_nguid.attr) { |
Christoph Hellwig | 002fab0 | 2017-11-09 13:50:16 +0100 | [diff] [blame] | 3412 | if (!memchr_inv(ids->nguid, 0, sizeof(ids->nguid))) |
Keith Busch | 2b9b6e8 | 2015-12-22 10:10:45 -0700 | [diff] [blame] | 3413 | return 0; |
| 3414 | } |
| 3415 | if (a == &dev_attr_eui.attr) { |
Christoph Hellwig | 002fab0 | 2017-11-09 13:50:16 +0100 | [diff] [blame] | 3416 | if (!memchr_inv(ids->eui64, 0, sizeof(ids->eui64))) |
Keith Busch | 2b9b6e8 | 2015-12-22 10:10:45 -0700 | [diff] [blame] | 3417 | return 0; |
| 3418 | } |
Christoph Hellwig | 0d0b660 | 2018-05-14 08:48:54 +0200 | [diff] [blame] | 3419 | #ifdef CONFIG_NVME_MULTIPATH |
| 3420 | if (a == &dev_attr_ana_grpid.attr || a == &dev_attr_ana_state.attr) { |
| 3421 | if (dev_to_disk(dev)->fops != &nvme_fops) /* per-path attr */ |
| 3422 | return 0; |
| 3423 | if (!nvme_ctrl_use_ana(nvme_get_ns_from_dev(dev)->ctrl)) |
| 3424 | return 0; |
| 3425 | } |
| 3426 | #endif |
Keith Busch | 2b9b6e8 | 2015-12-22 10:10:45 -0700 | [diff] [blame] | 3427 | return a->mode; |
| 3428 | } |
| 3429 | |
Bart Van Assche | eb090c4 | 2018-10-08 14:28:39 -0700 | [diff] [blame] | 3430 | static const struct attribute_group nvme_ns_id_attr_group = { |
Christoph Hellwig | 5b85b82 | 2017-11-09 13:51:03 +0100 | [diff] [blame] | 3431 | .attrs = nvme_ns_id_attrs, |
| 3432 | .is_visible = nvme_ns_id_attrs_are_visible, |
Keith Busch | 2b9b6e8 | 2015-12-22 10:10:45 -0700 | [diff] [blame] | 3433 | }; |
| 3434 | |
Hannes Reinecke | 33b14f67 | 2018-09-28 08:17:20 +0200 | [diff] [blame] | 3435 | const struct attribute_group *nvme_ns_id_attr_groups[] = { |
| 3436 | &nvme_ns_id_attr_group, |
| 3437 | #ifdef CONFIG_NVM |
| 3438 | &nvme_nvm_attr_group, |
| 3439 | #endif |
| 3440 | NULL, |
| 3441 | }; |
| 3442 | |
Ming Lin | 931e1c2 | 2016-02-26 13:24:19 -0800 | [diff] [blame] | 3443 | #define nvme_show_str_function(field) \ |
Keith Busch | 779ff756 | 2016-01-12 15:09:31 -0700 | [diff] [blame] | 3444 | static ssize_t field##_show(struct device *dev, \ |
| 3445 | struct device_attribute *attr, char *buf) \ |
| 3446 | { \ |
| 3447 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); \ |
Christoph Hellwig | ab9e00c | 2017-11-09 13:48:55 +0100 | [diff] [blame] | 3448 | return sprintf(buf, "%.*s\n", \ |
| 3449 | (int)sizeof(ctrl->subsys->field), ctrl->subsys->field); \ |
Keith Busch | 779ff756 | 2016-01-12 15:09:31 -0700 | [diff] [blame] | 3450 | } \ |
| 3451 | static DEVICE_ATTR(field, S_IRUGO, field##_show, NULL); |
| 3452 | |
Christoph Hellwig | ab9e00c | 2017-11-09 13:48:55 +0100 | [diff] [blame] | 3453 | nvme_show_str_function(model); |
| 3454 | nvme_show_str_function(serial); |
| 3455 | nvme_show_str_function(firmware_rev); |
| 3456 | |
Ming Lin | 931e1c2 | 2016-02-26 13:24:19 -0800 | [diff] [blame] | 3457 | #define nvme_show_int_function(field) \ |
| 3458 | static ssize_t field##_show(struct device *dev, \ |
| 3459 | struct device_attribute *attr, char *buf) \ |
| 3460 | { \ |
| 3461 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); \ |
| 3462 | return sprintf(buf, "%d\n", ctrl->field); \ |
| 3463 | } \ |
| 3464 | static DEVICE_ATTR(field, S_IRUGO, field##_show, NULL); |
| 3465 | |
Ming Lin | 931e1c2 | 2016-02-26 13:24:19 -0800 | [diff] [blame] | 3466 | nvme_show_int_function(cntlid); |
Hannes Reinecke | 103e515 | 2018-11-16 09:22:29 +0100 | [diff] [blame] | 3467 | nvme_show_int_function(numa_node); |
James Smart | 2b1ff25 | 2019-09-24 14:22:08 -0700 | [diff] [blame] | 3468 | nvme_show_int_function(queue_count); |
| 3469 | nvme_show_int_function(sqsize); |
Keith Busch | 779ff756 | 2016-01-12 15:09:31 -0700 | [diff] [blame] | 3470 | |
Ming Lin | 1a353d8 | 2016-06-13 16:45:24 +0200 | [diff] [blame] | 3471 | static ssize_t nvme_sysfs_delete(struct device *dev, |
| 3472 | struct device_attribute *attr, const char *buf, |
| 3473 | size_t count) |
| 3474 | { |
| 3475 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); |
| 3476 | |
Israel Rukshin | ce15181 | 2020-03-24 17:29:43 +0200 | [diff] [blame] | 3477 | /* Can't delete non-created controllers */ |
| 3478 | if (!ctrl->created) |
| 3479 | return -EBUSY; |
| 3480 | |
Ming Lin | 1a353d8 | 2016-06-13 16:45:24 +0200 | [diff] [blame] | 3481 | if (device_remove_file_self(dev, attr)) |
Christoph Hellwig | c5017e8 | 2017-10-29 10:44:29 +0200 | [diff] [blame] | 3482 | nvme_delete_ctrl_sync(ctrl); |
Ming Lin | 1a353d8 | 2016-06-13 16:45:24 +0200 | [diff] [blame] | 3483 | return count; |
| 3484 | } |
| 3485 | static DEVICE_ATTR(delete_controller, S_IWUSR, NULL, nvme_sysfs_delete); |
| 3486 | |
| 3487 | static ssize_t nvme_sysfs_show_transport(struct device *dev, |
| 3488 | struct device_attribute *attr, |
| 3489 | char *buf) |
| 3490 | { |
| 3491 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); |
| 3492 | |
| 3493 | return snprintf(buf, PAGE_SIZE, "%s\n", ctrl->ops->name); |
| 3494 | } |
| 3495 | static DEVICE_ATTR(transport, S_IRUGO, nvme_sysfs_show_transport, NULL); |
| 3496 | |
Sagi Grimberg | 8432bdb2 | 2016-11-28 01:47:40 +0200 | [diff] [blame] | 3497 | static ssize_t nvme_sysfs_show_state(struct device *dev, |
| 3498 | struct device_attribute *attr, |
| 3499 | char *buf) |
| 3500 | { |
| 3501 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); |
| 3502 | static const char *const state_name[] = { |
| 3503 | [NVME_CTRL_NEW] = "new", |
| 3504 | [NVME_CTRL_LIVE] = "live", |
| 3505 | [NVME_CTRL_RESETTING] = "resetting", |
Max Gurtovoy | ad6a0a5 | 2018-01-31 18:31:24 +0200 | [diff] [blame] | 3506 | [NVME_CTRL_CONNECTING] = "connecting", |
Sagi Grimberg | 8432bdb2 | 2016-11-28 01:47:40 +0200 | [diff] [blame] | 3507 | [NVME_CTRL_DELETING] = "deleting", |
Sagi Grimberg | ecca390e | 2020-07-22 16:32:19 -0700 | [diff] [blame] | 3508 | [NVME_CTRL_DELETING_NOIO]= "deleting (no IO)", |
Sagi Grimberg | 8432bdb2 | 2016-11-28 01:47:40 +0200 | [diff] [blame] | 3509 | [NVME_CTRL_DEAD] = "dead", |
| 3510 | }; |
| 3511 | |
| 3512 | if ((unsigned)ctrl->state < ARRAY_SIZE(state_name) && |
| 3513 | state_name[ctrl->state]) |
| 3514 | return sprintf(buf, "%s\n", state_name[ctrl->state]); |
| 3515 | |
| 3516 | return sprintf(buf, "unknown state\n"); |
| 3517 | } |
| 3518 | |
| 3519 | static DEVICE_ATTR(state, S_IRUGO, nvme_sysfs_show_state, NULL); |
| 3520 | |
Ming Lin | 1a353d8 | 2016-06-13 16:45:24 +0200 | [diff] [blame] | 3521 | static ssize_t nvme_sysfs_show_subsysnqn(struct device *dev, |
| 3522 | struct device_attribute *attr, |
| 3523 | char *buf) |
| 3524 | { |
| 3525 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); |
| 3526 | |
Christoph Hellwig | ab9e00c | 2017-11-09 13:48:55 +0100 | [diff] [blame] | 3527 | return snprintf(buf, PAGE_SIZE, "%s\n", ctrl->subsys->subnqn); |
Ming Lin | 1a353d8 | 2016-06-13 16:45:24 +0200 | [diff] [blame] | 3528 | } |
| 3529 | static DEVICE_ATTR(subsysnqn, S_IRUGO, nvme_sysfs_show_subsysnqn, NULL); |
| 3530 | |
Sagi Grimberg | 76171c6 | 2020-02-07 17:13:53 -0800 | [diff] [blame] | 3531 | static ssize_t nvme_sysfs_show_hostnqn(struct device *dev, |
| 3532 | struct device_attribute *attr, |
| 3533 | char *buf) |
| 3534 | { |
| 3535 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); |
| 3536 | |
| 3537 | return snprintf(buf, PAGE_SIZE, "%s\n", ctrl->opts->host->nqn); |
| 3538 | } |
| 3539 | static DEVICE_ATTR(hostnqn, S_IRUGO, nvme_sysfs_show_hostnqn, NULL); |
| 3540 | |
Sagi Grimberg | 45fb19f | 2020-02-07 17:13:54 -0800 | [diff] [blame] | 3541 | static ssize_t nvme_sysfs_show_hostid(struct device *dev, |
| 3542 | struct device_attribute *attr, |
| 3543 | char *buf) |
| 3544 | { |
| 3545 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); |
| 3546 | |
| 3547 | return snprintf(buf, PAGE_SIZE, "%pU\n", &ctrl->opts->host->id); |
| 3548 | } |
| 3549 | static DEVICE_ATTR(hostid, S_IRUGO, nvme_sysfs_show_hostid, NULL); |
| 3550 | |
Ming Lin | 1a353d8 | 2016-06-13 16:45:24 +0200 | [diff] [blame] | 3551 | static ssize_t nvme_sysfs_show_address(struct device *dev, |
| 3552 | struct device_attribute *attr, |
| 3553 | char *buf) |
| 3554 | { |
| 3555 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); |
| 3556 | |
| 3557 | return ctrl->ops->get_address(ctrl, buf, PAGE_SIZE); |
| 3558 | } |
| 3559 | static DEVICE_ATTR(address, S_IRUGO, nvme_sysfs_show_address, NULL); |
| 3560 | |
Sagi Grimberg | 764075f | 2020-07-05 00:57:55 -0700 | [diff] [blame] | 3561 | static ssize_t nvme_ctrl_loss_tmo_show(struct device *dev, |
| 3562 | struct device_attribute *attr, char *buf) |
| 3563 | { |
| 3564 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); |
| 3565 | struct nvmf_ctrl_options *opts = ctrl->opts; |
| 3566 | |
| 3567 | if (ctrl->opts->max_reconnects == -1) |
| 3568 | return sprintf(buf, "off\n"); |
| 3569 | return sprintf(buf, "%d\n", |
| 3570 | opts->max_reconnects * opts->reconnect_delay); |
| 3571 | } |
| 3572 | |
| 3573 | static ssize_t nvme_ctrl_loss_tmo_store(struct device *dev, |
| 3574 | struct device_attribute *attr, const char *buf, size_t count) |
| 3575 | { |
| 3576 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); |
| 3577 | struct nvmf_ctrl_options *opts = ctrl->opts; |
| 3578 | int ctrl_loss_tmo, err; |
| 3579 | |
| 3580 | err = kstrtoint(buf, 10, &ctrl_loss_tmo); |
| 3581 | if (err) |
| 3582 | return -EINVAL; |
| 3583 | |
| 3584 | else if (ctrl_loss_tmo < 0) |
| 3585 | opts->max_reconnects = -1; |
| 3586 | else |
| 3587 | opts->max_reconnects = DIV_ROUND_UP(ctrl_loss_tmo, |
| 3588 | opts->reconnect_delay); |
| 3589 | return count; |
| 3590 | } |
| 3591 | static DEVICE_ATTR(ctrl_loss_tmo, S_IRUGO | S_IWUSR, |
| 3592 | nvme_ctrl_loss_tmo_show, nvme_ctrl_loss_tmo_store); |
| 3593 | |
| 3594 | static ssize_t nvme_ctrl_reconnect_delay_show(struct device *dev, |
| 3595 | struct device_attribute *attr, char *buf) |
| 3596 | { |
| 3597 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); |
| 3598 | |
| 3599 | if (ctrl->opts->reconnect_delay == -1) |
| 3600 | return sprintf(buf, "off\n"); |
| 3601 | return sprintf(buf, "%d\n", ctrl->opts->reconnect_delay); |
| 3602 | } |
| 3603 | |
| 3604 | static ssize_t nvme_ctrl_reconnect_delay_store(struct device *dev, |
| 3605 | struct device_attribute *attr, const char *buf, size_t count) |
| 3606 | { |
| 3607 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); |
| 3608 | unsigned int v; |
| 3609 | int err; |
| 3610 | |
| 3611 | err = kstrtou32(buf, 10, &v); |
Dan Carpenter | eca9e82 | 2020-07-14 13:57:32 +0300 | [diff] [blame] | 3612 | if (err) |
| 3613 | return err; |
Sagi Grimberg | 764075f | 2020-07-05 00:57:55 -0700 | [diff] [blame] | 3614 | |
| 3615 | ctrl->opts->reconnect_delay = v; |
| 3616 | return count; |
| 3617 | } |
| 3618 | static DEVICE_ATTR(reconnect_delay, S_IRUGO | S_IWUSR, |
| 3619 | nvme_ctrl_reconnect_delay_show, nvme_ctrl_reconnect_delay_store); |
| 3620 | |
Keith Busch | 779ff756 | 2016-01-12 15:09:31 -0700 | [diff] [blame] | 3621 | static struct attribute *nvme_dev_attrs[] = { |
| 3622 | &dev_attr_reset_controller.attr, |
Keith Busch | 9ec3bb2 | 2016-04-29 15:45:18 -0600 | [diff] [blame] | 3623 | &dev_attr_rescan_controller.attr, |
Keith Busch | 779ff756 | 2016-01-12 15:09:31 -0700 | [diff] [blame] | 3624 | &dev_attr_model.attr, |
| 3625 | &dev_attr_serial.attr, |
| 3626 | &dev_attr_firmware_rev.attr, |
Ming Lin | 931e1c2 | 2016-02-26 13:24:19 -0800 | [diff] [blame] | 3627 | &dev_attr_cntlid.attr, |
Ming Lin | 1a353d8 | 2016-06-13 16:45:24 +0200 | [diff] [blame] | 3628 | &dev_attr_delete_controller.attr, |
| 3629 | &dev_attr_transport.attr, |
| 3630 | &dev_attr_subsysnqn.attr, |
| 3631 | &dev_attr_address.attr, |
Sagi Grimberg | 8432bdb2 | 2016-11-28 01:47:40 +0200 | [diff] [blame] | 3632 | &dev_attr_state.attr, |
Hannes Reinecke | 103e515 | 2018-11-16 09:22:29 +0100 | [diff] [blame] | 3633 | &dev_attr_numa_node.attr, |
James Smart | 2b1ff25 | 2019-09-24 14:22:08 -0700 | [diff] [blame] | 3634 | &dev_attr_queue_count.attr, |
| 3635 | &dev_attr_sqsize.attr, |
Sagi Grimberg | 76171c6 | 2020-02-07 17:13:53 -0800 | [diff] [blame] | 3636 | &dev_attr_hostnqn.attr, |
Sagi Grimberg | 45fb19f | 2020-02-07 17:13:54 -0800 | [diff] [blame] | 3637 | &dev_attr_hostid.attr, |
Sagi Grimberg | 764075f | 2020-07-05 00:57:55 -0700 | [diff] [blame] | 3638 | &dev_attr_ctrl_loss_tmo.attr, |
| 3639 | &dev_attr_reconnect_delay.attr, |
Keith Busch | 779ff756 | 2016-01-12 15:09:31 -0700 | [diff] [blame] | 3640 | NULL |
| 3641 | }; |
| 3642 | |
Ming Lin | 1a353d8 | 2016-06-13 16:45:24 +0200 | [diff] [blame] | 3643 | static umode_t nvme_dev_attrs_are_visible(struct kobject *kobj, |
| 3644 | struct attribute *a, int n) |
| 3645 | { |
| 3646 | struct device *dev = container_of(kobj, struct device, kobj); |
| 3647 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); |
| 3648 | |
Christoph Hellwig | 49d3d50 | 2017-06-26 12:39:03 +0200 | [diff] [blame] | 3649 | if (a == &dev_attr_delete_controller.attr && !ctrl->ops->delete_ctrl) |
| 3650 | return 0; |
| 3651 | if (a == &dev_attr_address.attr && !ctrl->ops->get_address) |
| 3652 | return 0; |
Sagi Grimberg | 76171c6 | 2020-02-07 17:13:53 -0800 | [diff] [blame] | 3653 | if (a == &dev_attr_hostnqn.attr && !ctrl->opts) |
| 3654 | return 0; |
Sagi Grimberg | 45fb19f | 2020-02-07 17:13:54 -0800 | [diff] [blame] | 3655 | if (a == &dev_attr_hostid.attr && !ctrl->opts) |
| 3656 | return 0; |
Ming Lin | 1a353d8 | 2016-06-13 16:45:24 +0200 | [diff] [blame] | 3657 | |
| 3658 | return a->mode; |
| 3659 | } |
| 3660 | |
Keith Busch | 779ff756 | 2016-01-12 15:09:31 -0700 | [diff] [blame] | 3661 | static struct attribute_group nvme_dev_attrs_group = { |
Ming Lin | 1a353d8 | 2016-06-13 16:45:24 +0200 | [diff] [blame] | 3662 | .attrs = nvme_dev_attrs, |
| 3663 | .is_visible = nvme_dev_attrs_are_visible, |
Keith Busch | 779ff756 | 2016-01-12 15:09:31 -0700 | [diff] [blame] | 3664 | }; |
| 3665 | |
| 3666 | static const struct attribute_group *nvme_dev_attr_groups[] = { |
| 3667 | &nvme_dev_attrs_group, |
| 3668 | NULL, |
| 3669 | }; |
| 3670 | |
Christoph Hellwig | 026d2ef | 2020-03-25 14:19:36 +0100 | [diff] [blame] | 3671 | static struct nvme_ns_head *nvme_find_ns_head(struct nvme_subsystem *subsys, |
Christoph Hellwig | ed754e5 | 2017-11-09 13:50:43 +0100 | [diff] [blame] | 3672 | unsigned nsid) |
| 3673 | { |
| 3674 | struct nvme_ns_head *h; |
| 3675 | |
| 3676 | lockdep_assert_held(&subsys->lock); |
| 3677 | |
| 3678 | list_for_each_entry(h, &subsys->nsheads, entry) { |
| 3679 | if (h->ns_id == nsid && kref_get_unless_zero(&h->ref)) |
| 3680 | return h; |
| 3681 | } |
| 3682 | |
| 3683 | return NULL; |
| 3684 | } |
| 3685 | |
| 3686 | static int __nvme_check_ids(struct nvme_subsystem *subsys, |
| 3687 | struct nvme_ns_head *new) |
| 3688 | { |
| 3689 | struct nvme_ns_head *h; |
| 3690 | |
| 3691 | lockdep_assert_held(&subsys->lock); |
| 3692 | |
| 3693 | list_for_each_entry(h, &subsys->nsheads, entry) { |
| 3694 | if (nvme_ns_ids_valid(&new->ids) && |
| 3695 | nvme_ns_ids_equal(&new->ids, &h->ids)) |
| 3696 | return -EINVAL; |
| 3697 | } |
| 3698 | |
| 3699 | return 0; |
| 3700 | } |
| 3701 | |
| 3702 | static struct nvme_ns_head *nvme_alloc_ns_head(struct nvme_ctrl *ctrl, |
Keith Busch | 03f8ceb | 2020-04-03 09:24:09 -0700 | [diff] [blame] | 3703 | unsigned nsid, struct nvme_ns_ids *ids) |
Christoph Hellwig | ed754e5 | 2017-11-09 13:50:43 +0100 | [diff] [blame] | 3704 | { |
| 3705 | struct nvme_ns_head *head; |
Christoph Hellwig | f333444 | 2018-09-11 09:51:29 +0200 | [diff] [blame] | 3706 | size_t size = sizeof(*head); |
Christoph Hellwig | ed754e5 | 2017-11-09 13:50:43 +0100 | [diff] [blame] | 3707 | int ret = -ENOMEM; |
| 3708 | |
Christoph Hellwig | f333444 | 2018-09-11 09:51:29 +0200 | [diff] [blame] | 3709 | #ifdef CONFIG_NVME_MULTIPATH |
| 3710 | size += num_possible_nodes() * sizeof(struct nvme_ns *); |
| 3711 | #endif |
| 3712 | |
| 3713 | head = kzalloc(size, GFP_KERNEL); |
Christoph Hellwig | ed754e5 | 2017-11-09 13:50:43 +0100 | [diff] [blame] | 3714 | if (!head) |
| 3715 | goto out; |
| 3716 | ret = ida_simple_get(&ctrl->subsys->ns_ida, 1, 0, GFP_KERNEL); |
| 3717 | if (ret < 0) |
| 3718 | goto out_free_head; |
| 3719 | head->instance = ret; |
| 3720 | INIT_LIST_HEAD(&head->list); |
Max Gurtovoy | fd92c77 | 2018-04-12 09:16:12 -0600 | [diff] [blame] | 3721 | ret = init_srcu_struct(&head->srcu); |
| 3722 | if (ret) |
| 3723 | goto out_ida_remove; |
Christoph Hellwig | ed754e5 | 2017-11-09 13:50:43 +0100 | [diff] [blame] | 3724 | head->subsys = ctrl->subsys; |
| 3725 | head->ns_id = nsid; |
Christoph Hellwig | 43fcd9e | 2020-03-25 14:19:37 +0100 | [diff] [blame] | 3726 | head->ids = *ids; |
Christoph Hellwig | ed754e5 | 2017-11-09 13:50:43 +0100 | [diff] [blame] | 3727 | kref_init(&head->ref); |
| 3728 | |
Christoph Hellwig | ed754e5 | 2017-11-09 13:50:43 +0100 | [diff] [blame] | 3729 | ret = __nvme_check_ids(ctrl->subsys, head); |
| 3730 | if (ret) { |
| 3731 | dev_err(ctrl->device, |
| 3732 | "duplicate IDs for nsid %d\n", nsid); |
| 3733 | goto out_cleanup_srcu; |
| 3734 | } |
| 3735 | |
Keith Busch | be93e87 | 2020-06-29 12:06:40 -0700 | [diff] [blame] | 3736 | if (head->ids.csi) { |
| 3737 | ret = nvme_get_effects_log(ctrl, head->ids.csi, &head->effects); |
| 3738 | if (ret) |
| 3739 | goto out_cleanup_srcu; |
| 3740 | } else |
| 3741 | head->effects = ctrl->effects; |
| 3742 | |
Christoph Hellwig | 32acab3 | 2017-11-02 12:59:30 +0100 | [diff] [blame] | 3743 | ret = nvme_mpath_alloc_disk(ctrl, head); |
| 3744 | if (ret) |
| 3745 | goto out_cleanup_srcu; |
| 3746 | |
Christoph Hellwig | ed754e5 | 2017-11-09 13:50:43 +0100 | [diff] [blame] | 3747 | list_add_tail(&head->entry, &ctrl->subsys->nsheads); |
Jianchao Wang | 12d9f07 | 2018-05-04 16:01:57 +0800 | [diff] [blame] | 3748 | |
| 3749 | kref_get(&ctrl->subsys->ref); |
| 3750 | |
Christoph Hellwig | ed754e5 | 2017-11-09 13:50:43 +0100 | [diff] [blame] | 3751 | return head; |
| 3752 | out_cleanup_srcu: |
| 3753 | cleanup_srcu_struct(&head->srcu); |
Max Gurtovoy | fd92c77 | 2018-04-12 09:16:12 -0600 | [diff] [blame] | 3754 | out_ida_remove: |
Christoph Hellwig | ed754e5 | 2017-11-09 13:50:43 +0100 | [diff] [blame] | 3755 | ida_simple_remove(&ctrl->subsys->ns_ida, head->instance); |
| 3756 | out_free_head: |
| 3757 | kfree(head); |
| 3758 | out: |
Sagi Grimberg | 538af88 | 2019-08-02 18:16:12 -0700 | [diff] [blame] | 3759 | if (ret > 0) |
| 3760 | ret = blk_status_to_errno(nvme_error_status(ret)); |
Christoph Hellwig | ed754e5 | 2017-11-09 13:50:43 +0100 | [diff] [blame] | 3761 | return ERR_PTR(ret); |
| 3762 | } |
| 3763 | |
| 3764 | static int nvme_init_ns_head(struct nvme_ns *ns, unsigned nsid, |
Baegjae Sung | 9bd82b1 | 2018-02-28 16:06:04 +0900 | [diff] [blame] | 3765 | struct nvme_id_ns *id) |
Christoph Hellwig | ed754e5 | 2017-11-09 13:50:43 +0100 | [diff] [blame] | 3766 | { |
| 3767 | struct nvme_ctrl *ctrl = ns->ctrl; |
Keith Busch | 92decf1 | 2020-04-03 10:53:46 -0700 | [diff] [blame] | 3768 | bool is_shared = id->nmic & NVME_NS_NMIC_SHARED; |
Christoph Hellwig | ed754e5 | 2017-11-09 13:50:43 +0100 | [diff] [blame] | 3769 | struct nvme_ns_head *head = NULL; |
Christoph Hellwig | 43fcd9e | 2020-03-25 14:19:37 +0100 | [diff] [blame] | 3770 | struct nvme_ns_ids ids; |
Christoph Hellwig | ed754e5 | 2017-11-09 13:50:43 +0100 | [diff] [blame] | 3771 | int ret = 0; |
| 3772 | |
Christoph Hellwig | 43fcd9e | 2020-03-25 14:19:37 +0100 | [diff] [blame] | 3773 | ret = nvme_report_ns_ids(ctrl, nsid, id, &ids); |
Christoph Hellwig | 6623c5b | 2020-04-22 09:59:08 +0200 | [diff] [blame] | 3774 | if (ret) { |
| 3775 | if (ret < 0) |
| 3776 | return ret; |
| 3777 | return blk_status_to_errno(nvme_error_status(ret)); |
| 3778 | } |
Christoph Hellwig | 43fcd9e | 2020-03-25 14:19:37 +0100 | [diff] [blame] | 3779 | |
Christoph Hellwig | ed754e5 | 2017-11-09 13:50:43 +0100 | [diff] [blame] | 3780 | mutex_lock(&ctrl->subsys->lock); |
Keith Busch | 9ad1927 | 2020-04-09 09:09:01 -0700 | [diff] [blame] | 3781 | head = nvme_find_ns_head(ctrl->subsys, nsid); |
Christoph Hellwig | ed754e5 | 2017-11-09 13:50:43 +0100 | [diff] [blame] | 3782 | if (!head) { |
Keith Busch | 03f8ceb | 2020-04-03 09:24:09 -0700 | [diff] [blame] | 3783 | head = nvme_alloc_ns_head(ctrl, nsid, &ids); |
Christoph Hellwig | ed754e5 | 2017-11-09 13:50:43 +0100 | [diff] [blame] | 3784 | if (IS_ERR(head)) { |
| 3785 | ret = PTR_ERR(head); |
| 3786 | goto out_unlock; |
| 3787 | } |
Keith Busch | 0c284db | 2020-04-09 09:09:02 -0700 | [diff] [blame] | 3788 | head->shared = is_shared; |
Christoph Hellwig | ed754e5 | 2017-11-09 13:50:43 +0100 | [diff] [blame] | 3789 | } else { |
Christoph Hellwig | 6623c5b | 2020-04-22 09:59:08 +0200 | [diff] [blame] | 3790 | ret = -EINVAL; |
Keith Busch | 0c284db | 2020-04-09 09:09:02 -0700 | [diff] [blame] | 3791 | if (!is_shared || !head->shared) { |
Keith Busch | 9ad1927 | 2020-04-09 09:09:01 -0700 | [diff] [blame] | 3792 | dev_err(ctrl->device, |
Christoph Hellwig | 6623c5b | 2020-04-22 09:59:08 +0200 | [diff] [blame] | 3793 | "Duplicate unshared namespace %d\n", nsid); |
| 3794 | goto out_put_ns_head; |
Keith Busch | 9ad1927 | 2020-04-09 09:09:01 -0700 | [diff] [blame] | 3795 | } |
Christoph Hellwig | ed754e5 | 2017-11-09 13:50:43 +0100 | [diff] [blame] | 3796 | if (!nvme_ns_ids_equal(&head->ids, &ids)) { |
| 3797 | dev_err(ctrl->device, |
| 3798 | "IDs don't match for shared namespace %d\n", |
| 3799 | nsid); |
Christoph Hellwig | 6623c5b | 2020-04-22 09:59:08 +0200 | [diff] [blame] | 3800 | goto out_put_ns_head; |
Christoph Hellwig | ed754e5 | 2017-11-09 13:50:43 +0100 | [diff] [blame] | 3801 | } |
Christoph Hellwig | ed754e5 | 2017-11-09 13:50:43 +0100 | [diff] [blame] | 3802 | } |
| 3803 | |
| 3804 | list_add_tail(&ns->siblings, &head->list); |
| 3805 | ns->head = head; |
Christoph Hellwig | 6623c5b | 2020-04-22 09:59:08 +0200 | [diff] [blame] | 3806 | mutex_unlock(&ctrl->subsys->lock); |
| 3807 | return 0; |
Christoph Hellwig | ed754e5 | 2017-11-09 13:50:43 +0100 | [diff] [blame] | 3808 | |
Christoph Hellwig | 6623c5b | 2020-04-22 09:59:08 +0200 | [diff] [blame] | 3809 | out_put_ns_head: |
| 3810 | nvme_put_ns_head(head); |
Christoph Hellwig | ed754e5 | 2017-11-09 13:50:43 +0100 | [diff] [blame] | 3811 | out_unlock: |
| 3812 | mutex_unlock(&ctrl->subsys->lock); |
| 3813 | return ret; |
| 3814 | } |
| 3815 | |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 3816 | static int ns_cmp(void *priv, struct list_head *a, struct list_head *b) |
| 3817 | { |
| 3818 | struct nvme_ns *nsa = container_of(a, struct nvme_ns, list); |
| 3819 | struct nvme_ns *nsb = container_of(b, struct nvme_ns, list); |
| 3820 | |
Christoph Hellwig | ed754e5 | 2017-11-09 13:50:43 +0100 | [diff] [blame] | 3821 | return nsa->head->ns_id - nsb->head->ns_id; |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 3822 | } |
| 3823 | |
Logan Gunthorpe | 24493b8 | 2020-07-24 11:25:16 -0600 | [diff] [blame] | 3824 | struct nvme_ns *nvme_find_get_ns(struct nvme_ctrl *ctrl, unsigned nsid) |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 3825 | { |
Keith Busch | 32f0c4a | 2016-07-13 11:45:02 -0600 | [diff] [blame] | 3826 | struct nvme_ns *ns, *ret = NULL; |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 3827 | |
Jianchao Wang | 765cc031 | 2018-02-12 20:54:46 +0800 | [diff] [blame] | 3828 | down_read(&ctrl->namespaces_rwsem); |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 3829 | list_for_each_entry(ns, &ctrl->namespaces, list) { |
Christoph Hellwig | ed754e5 | 2017-11-09 13:50:43 +0100 | [diff] [blame] | 3830 | if (ns->head->ns_id == nsid) { |
Christoph Hellwig | 2dd4122 | 2017-10-18 13:20:01 +0200 | [diff] [blame] | 3831 | if (!kref_get_unless_zero(&ns->kref)) |
| 3832 | continue; |
Keith Busch | 32f0c4a | 2016-07-13 11:45:02 -0600 | [diff] [blame] | 3833 | ret = ns; |
| 3834 | break; |
| 3835 | } |
Christoph Hellwig | ed754e5 | 2017-11-09 13:50:43 +0100 | [diff] [blame] | 3836 | if (ns->head->ns_id > nsid) |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 3837 | break; |
| 3838 | } |
Jianchao Wang | 765cc031 | 2018-02-12 20:54:46 +0800 | [diff] [blame] | 3839 | up_read(&ctrl->namespaces_rwsem); |
Keith Busch | 32f0c4a | 2016-07-13 11:45:02 -0600 | [diff] [blame] | 3840 | return ret; |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 3841 | } |
Logan Gunthorpe | 24493b8 | 2020-07-24 11:25:16 -0600 | [diff] [blame] | 3842 | EXPORT_SYMBOL_NS_GPL(nvme_find_get_ns, NVME_TARGET_PASSTHRU); |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 3843 | |
Edmund Nadolski | adce7e9 | 2019-11-27 10:17:43 -0700 | [diff] [blame] | 3844 | static void nvme_alloc_ns(struct nvme_ctrl *ctrl, unsigned nsid) |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 3845 | { |
| 3846 | struct nvme_ns *ns; |
| 3847 | struct gendisk *disk; |
Matias Bjørling | ac81bfa9 | 2016-09-16 14:25:04 +0200 | [diff] [blame] | 3848 | struct nvme_id_ns *id; |
| 3849 | char disk_name[DISK_NAME_LEN]; |
Hannes Reinecke | ab4ab09 | 2019-02-19 13:13:57 +0100 | [diff] [blame] | 3850 | int node = ctrl->numa_node, flags = GENHD_FL_EXT_DEVT, ret; |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 3851 | |
| 3852 | ns = kzalloc_node(sizeof(*ns), GFP_KERNEL, node); |
| 3853 | if (!ns) |
Edmund Nadolski | adce7e9 | 2019-11-27 10:17:43 -0700 | [diff] [blame] | 3854 | return; |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 3855 | |
| 3856 | ns->queue = blk_mq_init_queue(ctrl->tagset); |
Edmund Nadolski | adce7e9 | 2019-11-27 10:17:43 -0700 | [diff] [blame] | 3857 | if (IS_ERR(ns->queue)) |
Christoph Hellwig | ed754e5 | 2017-11-09 13:50:43 +0100 | [diff] [blame] | 3858 | goto out_free_ns; |
Logan Gunthorpe | e0596ab | 2018-10-04 15:27:44 -0600 | [diff] [blame] | 3859 | |
Minwoo Im | 7d30c81 | 2019-07-12 02:04:47 +0900 | [diff] [blame] | 3860 | if (ctrl->opts && ctrl->opts->data_digest) |
Mikhail Skorzhinskii | 958f2a0 | 2019-07-04 09:59:18 +0200 | [diff] [blame] | 3861 | ns->queue->backing_dev_info->capabilities |
| 3862 | |= BDI_CAP_STABLE_WRITES; |
| 3863 | |
Bart Van Assche | 8b904b5 | 2018-03-07 17:10:10 -0800 | [diff] [blame] | 3864 | blk_queue_flag_set(QUEUE_FLAG_NONROT, ns->queue); |
Logan Gunthorpe | e0596ab | 2018-10-04 15:27:44 -0600 | [diff] [blame] | 3865 | if (ctrl->ops->flags & NVME_F_PCI_P2PDMA) |
| 3866 | blk_queue_flag_set(QUEUE_FLAG_PCI_P2PDMA, ns->queue); |
| 3867 | |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 3868 | ns->queue->queuedata = ns; |
| 3869 | ns->ctrl = ctrl; |
| 3870 | |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 3871 | kref_init(&ns->kref); |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 3872 | ns->lba_shift = 9; /* set to a default value for 512 until disk is validated */ |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 3873 | |
| 3874 | blk_queue_logical_block_size(ns->queue, 1 << ns->lba_shift); |
Christoph Hellwig | da35825 | 2016-03-02 18:07:11 +0100 | [diff] [blame] | 3875 | nvme_set_queue_limits(ctrl, ns->queue); |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 3876 | |
Sagi Grimberg | 331813f | 2019-08-02 18:11:42 -0700 | [diff] [blame] | 3877 | ret = nvme_identify_ns(ctrl, nsid, &id); |
| 3878 | if (ret) |
Matias Bjørling | ac81bfa9 | 2016-09-16 14:25:04 +0200 | [diff] [blame] | 3879 | goto out_free_queue; |
| 3880 | |
Edmund Nadolski | adce7e9 | 2019-11-27 10:17:43 -0700 | [diff] [blame] | 3881 | if (id->ncap == 0) /* no namespace (legacy quirk) */ |
Christoph Hellwig | cdbff4f | 2017-08-16 16:14:47 +0200 | [diff] [blame] | 3882 | goto out_free_id; |
| 3883 | |
Hannes Reinecke | ab4ab09 | 2019-02-19 13:13:57 +0100 | [diff] [blame] | 3884 | ret = nvme_init_ns_head(ns, nsid, id); |
| 3885 | if (ret) |
Christoph Hellwig | ed754e5 | 2017-11-09 13:50:43 +0100 | [diff] [blame] | 3886 | goto out_free_id; |
Keith Busch | a785dbc | 2018-04-26 14:22:41 -0600 | [diff] [blame] | 3887 | nvme_set_disk_name(disk_name, ns, ctrl, &flags); |
Christoph Hellwig | cdbff4f | 2017-08-16 16:14:47 +0200 | [diff] [blame] | 3888 | |
Matias Bjørling | 3dc87dd | 2016-11-28 22:38:53 +0100 | [diff] [blame] | 3889 | disk = alloc_disk_node(0, node); |
Edmund Nadolski | adce7e9 | 2019-11-27 10:17:43 -0700 | [diff] [blame] | 3890 | if (!disk) |
Christoph Hellwig | ed754e5 | 2017-11-09 13:50:43 +0100 | [diff] [blame] | 3891 | goto out_unlink_ns; |
Matias Bjørling | 3dc87dd | 2016-11-28 22:38:53 +0100 | [diff] [blame] | 3892 | |
| 3893 | disk->fops = &nvme_fops; |
| 3894 | disk->private_data = ns; |
| 3895 | disk->queue = ns->queue; |
Christoph Hellwig | 32acab3 | 2017-11-02 12:59:30 +0100 | [diff] [blame] | 3896 | disk->flags = flags; |
Matias Bjørling | 3dc87dd | 2016-11-28 22:38:53 +0100 | [diff] [blame] | 3897 | memcpy(disk->disk_name, disk_name, DISK_NAME_LEN); |
| 3898 | ns->disk = disk; |
| 3899 | |
Max Gurtovoy | 33cfdc2 | 2020-05-19 17:05:53 +0300 | [diff] [blame] | 3900 | if (__nvme_revalidate_disk(disk, id)) |
Niklas Cassel | 108a585 | 2020-06-07 13:45:20 +0200 | [diff] [blame] | 3901 | goto out_put_disk; |
Matias Bjørling | 3dc87dd | 2016-11-28 22:38:53 +0100 | [diff] [blame] | 3902 | |
Matias Bjørling | 85136c0 | 2018-12-11 20:16:20 +0100 | [diff] [blame] | 3903 | if ((ctrl->quirks & NVME_QUIRK_LIGHTNVM) && id->vs[0] == 0x1) { |
Hannes Reinecke | ab4ab09 | 2019-02-19 13:13:57 +0100 | [diff] [blame] | 3904 | ret = nvme_nvm_register(ns, disk_name, node); |
| 3905 | if (ret) { |
Matias Bjørling | 85136c0 | 2018-12-11 20:16:20 +0100 | [diff] [blame] | 3906 | dev_warn(ctrl->device, "LightNVM init failure\n"); |
| 3907 | goto out_put_disk; |
| 3908 | } |
| 3909 | } |
| 3910 | |
Jianchao Wang | 765cc031 | 2018-02-12 20:54:46 +0800 | [diff] [blame] | 3911 | down_write(&ctrl->namespaces_rwsem); |
Keith Busch | 32f0c4a | 2016-07-13 11:45:02 -0600 | [diff] [blame] | 3912 | list_add_tail(&ns->list, &ctrl->namespaces); |
Jianchao Wang | 765cc031 | 2018-02-12 20:54:46 +0800 | [diff] [blame] | 3913 | up_write(&ctrl->namespaces_rwsem); |
Keith Busch | 32f0c4a | 2016-07-13 11:45:02 -0600 | [diff] [blame] | 3914 | |
Christoph Hellwig | d22524a | 2017-10-18 13:25:42 +0200 | [diff] [blame] | 3915 | nvme_get_ctrl(ctrl); |
Matias Bjørling | ac81bfa9 | 2016-09-16 14:25:04 +0200 | [diff] [blame] | 3916 | |
Hannes Reinecke | 33b14f67 | 2018-09-28 08:17:20 +0200 | [diff] [blame] | 3917 | device_add_disk(ctrl->device, ns->disk, nvme_ns_id_attr_groups); |
Christoph Hellwig | 32acab3 | 2017-11-02 12:59:30 +0100 | [diff] [blame] | 3918 | |
Christoph Hellwig | 0d0b660 | 2018-05-14 08:48:54 +0200 | [diff] [blame] | 3919 | nvme_mpath_add_disk(ns, id); |
Akinobu Mita | a364645 | 2019-06-20 08:49:02 +0200 | [diff] [blame] | 3920 | nvme_fault_inject_init(&ns->fault_inject, ns->disk->disk_name); |
Christoph Hellwig | 0d0b660 | 2018-05-14 08:48:54 +0200 | [diff] [blame] | 3921 | kfree(id); |
| 3922 | |
Edmund Nadolski | adce7e9 | 2019-11-27 10:17:43 -0700 | [diff] [blame] | 3923 | return; |
Matias Bjørling | 85136c0 | 2018-12-11 20:16:20 +0100 | [diff] [blame] | 3924 | out_put_disk: |
Niklas Cassel | 132be62 | 2020-04-27 14:34:41 +0200 | [diff] [blame] | 3925 | /* prevent double queue cleanup */ |
| 3926 | ns->disk->queue = NULL; |
Matias Bjørling | 85136c0 | 2018-12-11 20:16:20 +0100 | [diff] [blame] | 3927 | put_disk(ns->disk); |
Christoph Hellwig | ed754e5 | 2017-11-09 13:50:43 +0100 | [diff] [blame] | 3928 | out_unlink_ns: |
| 3929 | mutex_lock(&ctrl->subsys->lock); |
| 3930 | list_del_rcu(&ns->siblings); |
Keith Busch | d567572 | 2020-04-09 09:08:59 -0700 | [diff] [blame] | 3931 | if (list_empty(&ns->head->list)) |
| 3932 | list_del_init(&ns->head->entry); |
Christoph Hellwig | ed754e5 | 2017-11-09 13:50:43 +0100 | [diff] [blame] | 3933 | mutex_unlock(&ctrl->subsys->lock); |
Sagi Grimberg | a63b837 | 2019-03-13 18:54:57 +0100 | [diff] [blame] | 3934 | nvme_put_ns_head(ns->head); |
Matias Bjørling | ac81bfa9 | 2016-09-16 14:25:04 +0200 | [diff] [blame] | 3935 | out_free_id: |
| 3936 | kfree(id); |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 3937 | out_free_queue: |
| 3938 | blk_cleanup_queue(ns->queue); |
| 3939 | out_free_ns: |
| 3940 | kfree(ns); |
| 3941 | } |
| 3942 | |
| 3943 | static void nvme_ns_remove(struct nvme_ns *ns) |
| 3944 | { |
Keith Busch | 646017a | 2016-02-24 09:15:54 -0700 | [diff] [blame] | 3945 | if (test_and_set_bit(NVME_NS_REMOVING, &ns->flags)) |
| 3946 | return; |
| 3947 | |
Akinobu Mita | a364645 | 2019-06-20 08:49:02 +0200 | [diff] [blame] | 3948 | nvme_fault_inject_fini(&ns->fault_inject); |
Anton Eidelman | 2181e45 | 2019-06-20 08:48:10 +0200 | [diff] [blame] | 3949 | |
| 3950 | mutex_lock(&ns->ctrl->subsys->lock); |
| 3951 | list_del_rcu(&ns->siblings); |
Keith Busch | d567572 | 2020-04-09 09:08:59 -0700 | [diff] [blame] | 3952 | if (list_empty(&ns->head->list)) |
| 3953 | list_del_init(&ns->head->entry); |
Anton Eidelman | 2181e45 | 2019-06-20 08:48:10 +0200 | [diff] [blame] | 3954 | mutex_unlock(&ns->ctrl->subsys->lock); |
Keith Busch | d567572 | 2020-04-09 09:08:59 -0700 | [diff] [blame] | 3955 | |
Anton Eidelman | 2181e45 | 2019-06-20 08:48:10 +0200 | [diff] [blame] | 3956 | synchronize_rcu(); /* guarantee not available in head->list */ |
| 3957 | nvme_mpath_clear_current_path(ns); |
| 3958 | synchronize_srcu(&ns->head->srcu); /* wait for concurrent submissions */ |
| 3959 | |
Christoph Hellwig | 3913f4f | 2020-07-08 16:18:27 +0200 | [diff] [blame] | 3960 | if (ns->disk->flags & GENHD_FL_UP) { |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 3961 | del_gendisk(ns->disk); |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 3962 | blk_cleanup_queue(ns->queue); |
Ming Lei | bd9f5d65 | 2017-12-06 18:30:09 +0800 | [diff] [blame] | 3963 | if (blk_get_integrity(ns->disk)) |
| 3964 | blk_integrity_unregister(ns->disk); |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 3965 | } |
Keith Busch | 32f0c4a | 2016-07-13 11:45:02 -0600 | [diff] [blame] | 3966 | |
Jianchao Wang | 765cc031 | 2018-02-12 20:54:46 +0800 | [diff] [blame] | 3967 | down_write(&ns->ctrl->namespaces_rwsem); |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 3968 | list_del_init(&ns->list); |
Jianchao Wang | 765cc031 | 2018-02-12 20:54:46 +0800 | [diff] [blame] | 3969 | up_write(&ns->ctrl->namespaces_rwsem); |
Keith Busch | 32f0c4a | 2016-07-13 11:45:02 -0600 | [diff] [blame] | 3970 | |
Sagi Grimberg | 479a322 | 2017-12-21 15:07:27 +0200 | [diff] [blame] | 3971 | nvme_mpath_check_last_path(ns); |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 3972 | nvme_put_ns(ns); |
| 3973 | } |
| 3974 | |
Christoph Hellwig | 4450ba3 | 2020-04-04 10:30:32 +0200 | [diff] [blame] | 3975 | static void nvme_ns_remove_by_nsid(struct nvme_ctrl *ctrl, u32 nsid) |
| 3976 | { |
| 3977 | struct nvme_ns *ns = nvme_find_get_ns(ctrl, nsid); |
| 3978 | |
| 3979 | if (ns) { |
| 3980 | nvme_ns_remove(ns); |
| 3981 | nvme_put_ns(ns); |
| 3982 | } |
| 3983 | } |
| 3984 | |
Keith Busch | 540c801 | 2015-10-22 15:45:06 -0600 | [diff] [blame] | 3985 | static void nvme_validate_ns(struct nvme_ctrl *ctrl, unsigned nsid) |
| 3986 | { |
| 3987 | struct nvme_ns *ns; |
| 3988 | |
Keith Busch | 32f0c4a | 2016-07-13 11:45:02 -0600 | [diff] [blame] | 3989 | ns = nvme_find_get_ns(ctrl, nsid); |
Keith Busch | 540c801 | 2015-10-22 15:45:06 -0600 | [diff] [blame] | 3990 | if (ns) { |
Christoph Hellwig | 3913f4f | 2020-07-08 16:18:27 +0200 | [diff] [blame] | 3991 | if (revalidate_disk(ns->disk)) |
Keith Busch | 540c801 | 2015-10-22 15:45:06 -0600 | [diff] [blame] | 3992 | nvme_ns_remove(ns); |
Keith Busch | 32f0c4a | 2016-07-13 11:45:02 -0600 | [diff] [blame] | 3993 | nvme_put_ns(ns); |
Keith Busch | 540c801 | 2015-10-22 15:45:06 -0600 | [diff] [blame] | 3994 | } else |
| 3995 | nvme_alloc_ns(ctrl, nsid); |
| 3996 | } |
| 3997 | |
Sunad Bhandary | 47b0e50 | 2016-05-27 15:59:43 +0530 | [diff] [blame] | 3998 | static void nvme_remove_invalid_namespaces(struct nvme_ctrl *ctrl, |
| 3999 | unsigned nsid) |
| 4000 | { |
| 4001 | struct nvme_ns *ns, *next; |
Jianchao Wang | 6f8e0d7 | 2018-02-12 20:54:44 +0800 | [diff] [blame] | 4002 | LIST_HEAD(rm_list); |
Sunad Bhandary | 47b0e50 | 2016-05-27 15:59:43 +0530 | [diff] [blame] | 4003 | |
Jianchao Wang | 765cc031 | 2018-02-12 20:54:46 +0800 | [diff] [blame] | 4004 | down_write(&ctrl->namespaces_rwsem); |
Sunad Bhandary | 47b0e50 | 2016-05-27 15:59:43 +0530 | [diff] [blame] | 4005 | list_for_each_entry_safe(ns, next, &ctrl->namespaces, list) { |
Scott Bauer | cf39a6b | 2018-06-29 13:03:28 -0600 | [diff] [blame] | 4006 | if (ns->head->ns_id > nsid || test_bit(NVME_NS_DEAD, &ns->flags)) |
Jianchao Wang | 6f8e0d7 | 2018-02-12 20:54:44 +0800 | [diff] [blame] | 4007 | list_move_tail(&ns->list, &rm_list); |
Sunad Bhandary | 47b0e50 | 2016-05-27 15:59:43 +0530 | [diff] [blame] | 4008 | } |
Jianchao Wang | 765cc031 | 2018-02-12 20:54:46 +0800 | [diff] [blame] | 4009 | up_write(&ctrl->namespaces_rwsem); |
Jianchao Wang | 6f8e0d7 | 2018-02-12 20:54:44 +0800 | [diff] [blame] | 4010 | |
| 4011 | list_for_each_entry_safe(ns, next, &rm_list, list) |
| 4012 | nvme_ns_remove(ns); |
| 4013 | |
Sunad Bhandary | 47b0e50 | 2016-05-27 15:59:43 +0530 | [diff] [blame] | 4014 | } |
| 4015 | |
Christoph Hellwig | 4005f28 | 2020-04-04 10:31:35 +0200 | [diff] [blame] | 4016 | static int nvme_scan_ns_list(struct nvme_ctrl *ctrl) |
Keith Busch | 540c801 | 2015-10-22 15:45:06 -0600 | [diff] [blame] | 4017 | { |
Christoph Hellwig | aec459b | 2020-04-04 10:34:21 +0200 | [diff] [blame] | 4018 | const int nr_entries = NVME_IDENTIFY_DATA_SIZE / sizeof(__le32); |
Keith Busch | 540c801 | 2015-10-22 15:45:06 -0600 | [diff] [blame] | 4019 | __le32 *ns_list; |
Christoph Hellwig | 4005f28 | 2020-04-04 10:31:35 +0200 | [diff] [blame] | 4020 | u32 prev = 0; |
| 4021 | int ret = 0, i; |
Keith Busch | 540c801 | 2015-10-22 15:45:06 -0600 | [diff] [blame] | 4022 | |
Christoph Hellwig | 25dcaa9 | 2020-04-04 10:16:03 +0200 | [diff] [blame] | 4023 | if (nvme_ctrl_limited_cns(ctrl)) |
| 4024 | return -EOPNOTSUPP; |
Keith Busch | 540c801 | 2015-10-22 15:45:06 -0600 | [diff] [blame] | 4025 | |
Minwoo Im | 42595eb | 2018-02-08 22:56:31 +0900 | [diff] [blame] | 4026 | ns_list = kzalloc(NVME_IDENTIFY_DATA_SIZE, GFP_KERNEL); |
Keith Busch | 540c801 | 2015-10-22 15:45:06 -0600 | [diff] [blame] | 4027 | if (!ns_list) |
| 4028 | return -ENOMEM; |
| 4029 | |
Christoph Hellwig | 4005f28 | 2020-04-04 10:31:35 +0200 | [diff] [blame] | 4030 | for (;;) { |
Keith Busch | 540c801 | 2015-10-22 15:45:06 -0600 | [diff] [blame] | 4031 | ret = nvme_identify_ns_list(ctrl, prev, ns_list); |
| 4032 | if (ret) |
Sunad Bhandary | 47b0e50 | 2016-05-27 15:59:43 +0530 | [diff] [blame] | 4033 | goto free; |
Keith Busch | 540c801 | 2015-10-22 15:45:06 -0600 | [diff] [blame] | 4034 | |
Christoph Hellwig | aec459b | 2020-04-04 10:34:21 +0200 | [diff] [blame] | 4035 | for (i = 0; i < nr_entries; i++) { |
Christoph Hellwig | 4005f28 | 2020-04-04 10:31:35 +0200 | [diff] [blame] | 4036 | u32 nsid = le32_to_cpu(ns_list[i]); |
| 4037 | |
| 4038 | if (!nsid) /* end of the list? */ |
Keith Busch | 540c801 | 2015-10-22 15:45:06 -0600 | [diff] [blame] | 4039 | goto out; |
Keith Busch | 540c801 | 2015-10-22 15:45:06 -0600 | [diff] [blame] | 4040 | nvme_validate_ns(ctrl, nsid); |
Christoph Hellwig | 4450ba3 | 2020-04-04 10:30:32 +0200 | [diff] [blame] | 4041 | while (++prev < nsid) |
| 4042 | nvme_ns_remove_by_nsid(ctrl, prev); |
Keith Busch | 540c801 | 2015-10-22 15:45:06 -0600 | [diff] [blame] | 4043 | } |
Keith Busch | 540c801 | 2015-10-22 15:45:06 -0600 | [diff] [blame] | 4044 | } |
| 4045 | out: |
Sunad Bhandary | 47b0e50 | 2016-05-27 15:59:43 +0530 | [diff] [blame] | 4046 | nvme_remove_invalid_namespaces(ctrl, prev); |
| 4047 | free: |
Keith Busch | 540c801 | 2015-10-22 15:45:06 -0600 | [diff] [blame] | 4048 | kfree(ns_list); |
| 4049 | return ret; |
| 4050 | } |
| 4051 | |
Christoph Hellwig | 4005f28 | 2020-04-04 10:31:35 +0200 | [diff] [blame] | 4052 | static void nvme_scan_ns_sequential(struct nvme_ctrl *ctrl) |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 4053 | { |
Christoph Hellwig | 4005f28 | 2020-04-04 10:31:35 +0200 | [diff] [blame] | 4054 | struct nvme_id_ctrl *id; |
| 4055 | u32 nn, i; |
| 4056 | |
| 4057 | if (nvme_identify_ctrl(ctrl, &id)) |
| 4058 | return; |
| 4059 | nn = le32_to_cpu(id->nn); |
| 4060 | kfree(id); |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 4061 | |
Keith Busch | 540c801 | 2015-10-22 15:45:06 -0600 | [diff] [blame] | 4062 | for (i = 1; i <= nn; i++) |
| 4063 | nvme_validate_ns(ctrl, i); |
| 4064 | |
Sunad Bhandary | 47b0e50 | 2016-05-27 15:59:43 +0530 | [diff] [blame] | 4065 | nvme_remove_invalid_namespaces(ctrl, nn); |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 4066 | } |
| 4067 | |
Christoph Hellwig | f493af3 | 2018-06-07 13:47:33 +0200 | [diff] [blame] | 4068 | static void nvme_clear_changed_ns_log(struct nvme_ctrl *ctrl) |
Christoph Hellwig | 30d9096 | 2018-05-25 18:17:41 +0200 | [diff] [blame] | 4069 | { |
| 4070 | size_t log_size = NVME_MAX_CHANGED_NAMESPACES * sizeof(__le32); |
| 4071 | __le32 *log; |
Christoph Hellwig | f493af3 | 2018-06-07 13:47:33 +0200 | [diff] [blame] | 4072 | int error; |
Christoph Hellwig | 30d9096 | 2018-05-25 18:17:41 +0200 | [diff] [blame] | 4073 | |
| 4074 | log = kzalloc(log_size, GFP_KERNEL); |
| 4075 | if (!log) |
Christoph Hellwig | f493af3 | 2018-06-07 13:47:33 +0200 | [diff] [blame] | 4076 | return; |
Christoph Hellwig | 30d9096 | 2018-05-25 18:17:41 +0200 | [diff] [blame] | 4077 | |
Christoph Hellwig | f493af3 | 2018-06-07 13:47:33 +0200 | [diff] [blame] | 4078 | /* |
| 4079 | * We need to read the log to clear the AEN, but we don't want to rely |
| 4080 | * on it for the changed namespace information as userspace could have |
| 4081 | * raced with us in reading the log page, which could cause us to miss |
| 4082 | * updates. |
| 4083 | */ |
Keith Busch | be93e87 | 2020-06-29 12:06:40 -0700 | [diff] [blame] | 4084 | error = nvme_get_log(ctrl, NVME_NSID_ALL, NVME_LOG_CHANGED_NS, 0, |
| 4085 | NVME_CSI_NVM, log, log_size, 0); |
Christoph Hellwig | f493af3 | 2018-06-07 13:47:33 +0200 | [diff] [blame] | 4086 | if (error) |
Christoph Hellwig | 30d9096 | 2018-05-25 18:17:41 +0200 | [diff] [blame] | 4087 | dev_warn(ctrl->device, |
| 4088 | "reading changed ns log failed: %d\n", error); |
Christoph Hellwig | 30d9096 | 2018-05-25 18:17:41 +0200 | [diff] [blame] | 4089 | |
Christoph Hellwig | 30d9096 | 2018-05-25 18:17:41 +0200 | [diff] [blame] | 4090 | kfree(log); |
Christoph Hellwig | 30d9096 | 2018-05-25 18:17:41 +0200 | [diff] [blame] | 4091 | } |
| 4092 | |
Christoph Hellwig | 5955be2 | 2016-04-26 13:51:59 +0200 | [diff] [blame] | 4093 | static void nvme_scan_work(struct work_struct *work) |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 4094 | { |
Christoph Hellwig | 5955be2 | 2016-04-26 13:51:59 +0200 | [diff] [blame] | 4095 | struct nvme_ctrl *ctrl = |
| 4096 | container_of(work, struct nvme_ctrl, scan_work); |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 4097 | |
Keith Busch | 5d02a5c | 2019-09-03 09:22:24 -0600 | [diff] [blame] | 4098 | /* No tagset on a live ctrl means IO queues could not created */ |
| 4099 | if (ctrl->state != NVME_CTRL_LIVE || !ctrl->tagset) |
Christoph Hellwig | 5955be2 | 2016-04-26 13:51:59 +0200 | [diff] [blame] | 4100 | return; |
| 4101 | |
Dan Carpenter | 7701619 | 2018-06-07 11:27:41 +0300 | [diff] [blame] | 4102 | if (test_and_clear_bit(NVME_AER_NOTICE_NS_CHANGED, &ctrl->events)) { |
Christoph Hellwig | 30d9096 | 2018-05-25 18:17:41 +0200 | [diff] [blame] | 4103 | dev_info(ctrl->device, "rescanning namespaces.\n"); |
Christoph Hellwig | f493af3 | 2018-06-07 13:47:33 +0200 | [diff] [blame] | 4104 | nvme_clear_changed_ns_log(ctrl); |
Christoph Hellwig | 30d9096 | 2018-05-25 18:17:41 +0200 | [diff] [blame] | 4105 | } |
| 4106 | |
Keith Busch | e7ad43c | 2019-01-28 09:46:07 -0700 | [diff] [blame] | 4107 | mutex_lock(&ctrl->scan_lock); |
Christoph Hellwig | 4005f28 | 2020-04-04 10:31:35 +0200 | [diff] [blame] | 4108 | if (nvme_scan_ns_list(ctrl) != 0) |
| 4109 | nvme_scan_ns_sequential(ctrl); |
Keith Busch | e7ad43c | 2019-01-28 09:46:07 -0700 | [diff] [blame] | 4110 | mutex_unlock(&ctrl->scan_lock); |
Christoph Hellwig | 25dcaa9 | 2020-04-04 10:16:03 +0200 | [diff] [blame] | 4111 | |
Jianchao Wang | 765cc031 | 2018-02-12 20:54:46 +0800 | [diff] [blame] | 4112 | down_write(&ctrl->namespaces_rwsem); |
Keith Busch | 540c801 | 2015-10-22 15:45:06 -0600 | [diff] [blame] | 4113 | list_sort(NULL, &ctrl->namespaces, ns_cmp); |
Jianchao Wang | 765cc031 | 2018-02-12 20:54:46 +0800 | [diff] [blame] | 4114 | up_write(&ctrl->namespaces_rwsem); |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 4115 | } |
Christoph Hellwig | 5955be2 | 2016-04-26 13:51:59 +0200 | [diff] [blame] | 4116 | |
Keith Busch | 32f0c4a | 2016-07-13 11:45:02 -0600 | [diff] [blame] | 4117 | /* |
| 4118 | * This function iterates the namespace list unlocked to allow recovery from |
| 4119 | * controller failure. It is up to the caller to ensure the namespace list is |
| 4120 | * not modified by scan work while this function is executing. |
| 4121 | */ |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 4122 | void nvme_remove_namespaces(struct nvme_ctrl *ctrl) |
| 4123 | { |
| 4124 | struct nvme_ns *ns, *next; |
Jianchao Wang | 6f8e0d7 | 2018-02-12 20:54:44 +0800 | [diff] [blame] | 4125 | LIST_HEAD(ns_list); |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 4126 | |
Sagi Grimberg | 0157ec8 | 2019-07-25 11:56:57 -0700 | [diff] [blame] | 4127 | /* |
| 4128 | * make sure to requeue I/O to all namespaces as these |
| 4129 | * might result from the scan itself and must complete |
| 4130 | * for the scan_work to make progress |
| 4131 | */ |
| 4132 | nvme_mpath_clear_ctrl_paths(ctrl); |
| 4133 | |
Sagi Grimberg | f6c8e43 | 2018-11-21 15:17:37 -0800 | [diff] [blame] | 4134 | /* prevent racing with ns scanning */ |
| 4135 | flush_work(&ctrl->scan_work); |
| 4136 | |
Keith Busch | 0ff9d4e | 2016-05-12 08:37:14 -0600 | [diff] [blame] | 4137 | /* |
| 4138 | * The dead states indicates the controller was not gracefully |
| 4139 | * disconnected. In that case, we won't be able to flush any data while |
| 4140 | * removing the namespaces' disks; fail all the queues now to avoid |
| 4141 | * potentially having to clean up the failed sync later. |
| 4142 | */ |
| 4143 | if (ctrl->state == NVME_CTRL_DEAD) |
| 4144 | nvme_kill_queues(ctrl); |
| 4145 | |
Sagi Grimberg | ecca390e | 2020-07-22 16:32:19 -0700 | [diff] [blame] | 4146 | /* this is a no-op when called from the controller reset handler */ |
| 4147 | nvme_change_ctrl_state(ctrl, NVME_CTRL_DELETING_NOIO); |
| 4148 | |
Jianchao Wang | 765cc031 | 2018-02-12 20:54:46 +0800 | [diff] [blame] | 4149 | down_write(&ctrl->namespaces_rwsem); |
Jianchao Wang | 6f8e0d7 | 2018-02-12 20:54:44 +0800 | [diff] [blame] | 4150 | list_splice_init(&ctrl->namespaces, &ns_list); |
Jianchao Wang | 765cc031 | 2018-02-12 20:54:46 +0800 | [diff] [blame] | 4151 | up_write(&ctrl->namespaces_rwsem); |
Jianchao Wang | 6f8e0d7 | 2018-02-12 20:54:44 +0800 | [diff] [blame] | 4152 | |
| 4153 | list_for_each_entry_safe(ns, next, &ns_list, list) |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 4154 | nvme_ns_remove(ns); |
| 4155 | } |
Ming Lin | 576d55d | 2016-02-10 10:03:32 -0800 | [diff] [blame] | 4156 | EXPORT_SYMBOL_GPL(nvme_remove_namespaces); |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 4157 | |
Sagi Grimberg | a42f42e | 2019-09-04 14:29:48 -0700 | [diff] [blame] | 4158 | static int nvme_class_uevent(struct device *dev, struct kobj_uevent_env *env) |
| 4159 | { |
| 4160 | struct nvme_ctrl *ctrl = |
| 4161 | container_of(dev, struct nvme_ctrl, ctrl_device); |
| 4162 | struct nvmf_ctrl_options *opts = ctrl->opts; |
| 4163 | int ret; |
| 4164 | |
| 4165 | ret = add_uevent_var(env, "NVME_TRTYPE=%s", ctrl->ops->name); |
| 4166 | if (ret) |
| 4167 | return ret; |
| 4168 | |
| 4169 | if (opts) { |
| 4170 | ret = add_uevent_var(env, "NVME_TRADDR=%s", opts->traddr); |
| 4171 | if (ret) |
| 4172 | return ret; |
| 4173 | |
| 4174 | ret = add_uevent_var(env, "NVME_TRSVCID=%s", |
| 4175 | opts->trsvcid ?: "none"); |
| 4176 | if (ret) |
| 4177 | return ret; |
| 4178 | |
| 4179 | ret = add_uevent_var(env, "NVME_HOST_TRADDR=%s", |
| 4180 | opts->host_traddr ?: "none"); |
| 4181 | } |
| 4182 | return ret; |
| 4183 | } |
| 4184 | |
Keith Busch | e3d7874 | 2017-11-07 15:13:14 -0700 | [diff] [blame] | 4185 | static void nvme_aen_uevent(struct nvme_ctrl *ctrl) |
| 4186 | { |
| 4187 | char *envp[2] = { NULL, NULL }; |
| 4188 | u32 aen_result = ctrl->aen_result; |
| 4189 | |
| 4190 | ctrl->aen_result = 0; |
| 4191 | if (!aen_result) |
| 4192 | return; |
| 4193 | |
| 4194 | envp[0] = kasprintf(GFP_KERNEL, "NVME_AEN=%#08x", aen_result); |
| 4195 | if (!envp[0]) |
| 4196 | return; |
| 4197 | kobject_uevent_env(&ctrl->device->kobj, KOBJ_CHANGE, envp); |
| 4198 | kfree(envp[0]); |
| 4199 | } |
| 4200 | |
Christoph Hellwig | f866fc42 | 2016-04-26 13:52:00 +0200 | [diff] [blame] | 4201 | static void nvme_async_event_work(struct work_struct *work) |
| 4202 | { |
| 4203 | struct nvme_ctrl *ctrl = |
| 4204 | container_of(work, struct nvme_ctrl, async_event_work); |
| 4205 | |
Keith Busch | e3d7874 | 2017-11-07 15:13:14 -0700 | [diff] [blame] | 4206 | nvme_aen_uevent(ctrl); |
Keith Busch | ad22c35 | 2017-11-07 15:13:12 -0700 | [diff] [blame] | 4207 | ctrl->ops->submit_async_event(ctrl); |
Christoph Hellwig | f866fc42 | 2016-04-26 13:52:00 +0200 | [diff] [blame] | 4208 | } |
| 4209 | |
Arnav Dawn | b6dccf7 | 2017-07-12 16:10:40 +0530 | [diff] [blame] | 4210 | static bool nvme_ctrl_pp_status(struct nvme_ctrl *ctrl) |
| 4211 | { |
| 4212 | |
| 4213 | u32 csts; |
| 4214 | |
| 4215 | if (ctrl->ops->reg_read32(ctrl, NVME_REG_CSTS, &csts)) |
| 4216 | return false; |
| 4217 | |
| 4218 | if (csts == ~0) |
| 4219 | return false; |
| 4220 | |
| 4221 | return ((ctrl->ctrl_config & NVME_CC_ENABLE) && (csts & NVME_CSTS_PP)); |
| 4222 | } |
| 4223 | |
| 4224 | static void nvme_get_fw_slot_info(struct nvme_ctrl *ctrl) |
| 4225 | { |
Arnav Dawn | b6dccf7 | 2017-07-12 16:10:40 +0530 | [diff] [blame] | 4226 | struct nvme_fw_slot_info_log *log; |
| 4227 | |
| 4228 | log = kmalloc(sizeof(*log), GFP_KERNEL); |
| 4229 | if (!log) |
| 4230 | return; |
| 4231 | |
Keith Busch | be93e87 | 2020-06-29 12:06:40 -0700 | [diff] [blame] | 4232 | if (nvme_get_log(ctrl, NVME_NSID_ALL, NVME_LOG_FW_SLOT, 0, NVME_CSI_NVM, |
| 4233 | log, sizeof(*log), 0)) |
Christoph Hellwig | 0e98719 | 2018-06-06 14:39:00 +0200 | [diff] [blame] | 4234 | dev_warn(ctrl->device, "Get FW SLOT INFO log error\n"); |
Arnav Dawn | b6dccf7 | 2017-07-12 16:10:40 +0530 | [diff] [blame] | 4235 | kfree(log); |
| 4236 | } |
| 4237 | |
| 4238 | static void nvme_fw_act_work(struct work_struct *work) |
| 4239 | { |
| 4240 | struct nvme_ctrl *ctrl = container_of(work, |
| 4241 | struct nvme_ctrl, fw_act_work); |
| 4242 | unsigned long fw_act_timeout; |
| 4243 | |
| 4244 | if (ctrl->mtfa) |
| 4245 | fw_act_timeout = jiffies + |
| 4246 | msecs_to_jiffies(ctrl->mtfa * 100); |
| 4247 | else |
| 4248 | fw_act_timeout = jiffies + |
| 4249 | msecs_to_jiffies(admin_timeout * 1000); |
| 4250 | |
| 4251 | nvme_stop_queues(ctrl); |
| 4252 | while (nvme_ctrl_pp_status(ctrl)) { |
| 4253 | if (time_after(jiffies, fw_act_timeout)) { |
| 4254 | dev_warn(ctrl->device, |
| 4255 | "Fw activation timeout, reset controller\n"); |
Keith Busch | 4c75f87 | 2019-09-06 11:23:08 -0600 | [diff] [blame] | 4256 | nvme_try_sched_reset(ctrl); |
| 4257 | return; |
Arnav Dawn | b6dccf7 | 2017-07-12 16:10:40 +0530 | [diff] [blame] | 4258 | } |
| 4259 | msleep(100); |
| 4260 | } |
| 4261 | |
Keith Busch | 4c75f87 | 2019-09-06 11:23:08 -0600 | [diff] [blame] | 4262 | if (!nvme_change_ctrl_state(ctrl, NVME_CTRL_LIVE)) |
Arnav Dawn | b6dccf7 | 2017-07-12 16:10:40 +0530 | [diff] [blame] | 4263 | return; |
| 4264 | |
| 4265 | nvme_start_queues(ctrl); |
Minwoo Im | a806c6c | 2017-11-02 18:07:44 +0900 | [diff] [blame] | 4266 | /* read FW slot information to clear the AER */ |
Arnav Dawn | b6dccf7 | 2017-07-12 16:10:40 +0530 | [diff] [blame] | 4267 | nvme_get_fw_slot_info(ctrl); |
| 4268 | } |
| 4269 | |
Christoph Hellwig | 868c239 | 2018-05-22 11:09:54 +0200 | [diff] [blame] | 4270 | static void nvme_handle_aen_notice(struct nvme_ctrl *ctrl, u32 result) |
Christoph Hellwig | f866fc42 | 2016-04-26 13:52:00 +0200 | [diff] [blame] | 4271 | { |
Chaitanya Kulkarni | 09bd1ff | 2018-09-17 10:47:06 -0700 | [diff] [blame] | 4272 | u32 aer_notice_type = (result & 0xff00) >> 8; |
| 4273 | |
Chaitanya Kulkarni | 521cfb8 | 2019-05-13 10:46:05 -0700 | [diff] [blame] | 4274 | trace_nvme_async_event(ctrl, aer_notice_type); |
| 4275 | |
Chaitanya Kulkarni | 09bd1ff | 2018-09-17 10:47:06 -0700 | [diff] [blame] | 4276 | switch (aer_notice_type) { |
Christoph Hellwig | f866fc42 | 2016-04-26 13:52:00 +0200 | [diff] [blame] | 4277 | case NVME_AER_NOTICE_NS_CHANGED: |
Dan Carpenter | 7701619 | 2018-06-07 11:27:41 +0300 | [diff] [blame] | 4278 | set_bit(NVME_AER_NOTICE_NS_CHANGED, &ctrl->events); |
Christoph Hellwig | f866fc42 | 2016-04-26 13:52:00 +0200 | [diff] [blame] | 4279 | nvme_queue_scan(ctrl); |
| 4280 | break; |
Arnav Dawn | b6dccf7 | 2017-07-12 16:10:40 +0530 | [diff] [blame] | 4281 | case NVME_AER_NOTICE_FW_ACT_STARTING: |
Keith Busch | 4c75f87 | 2019-09-06 11:23:08 -0600 | [diff] [blame] | 4282 | /* |
| 4283 | * We are (ab)using the RESETTING state to prevent subsequent |
| 4284 | * recovery actions from interfering with the controller's |
| 4285 | * firmware activation. |
| 4286 | */ |
| 4287 | if (nvme_change_ctrl_state(ctrl, NVME_CTRL_RESETTING)) |
| 4288 | queue_work(nvme_wq, &ctrl->fw_act_work); |
Arnav Dawn | b6dccf7 | 2017-07-12 16:10:40 +0530 | [diff] [blame] | 4289 | break; |
Christoph Hellwig | 0d0b660 | 2018-05-14 08:48:54 +0200 | [diff] [blame] | 4290 | #ifdef CONFIG_NVME_MULTIPATH |
| 4291 | case NVME_AER_NOTICE_ANA: |
| 4292 | if (!ctrl->ana_log_buf) |
| 4293 | break; |
| 4294 | queue_work(nvme_wq, &ctrl->ana_work); |
| 4295 | break; |
| 4296 | #endif |
Sagi Grimberg | 85f8a43 | 2019-07-12 11:02:10 -0700 | [diff] [blame] | 4297 | case NVME_AER_NOTICE_DISC_CHANGED: |
| 4298 | ctrl->aen_result = result; |
| 4299 | break; |
Christoph Hellwig | f866fc42 | 2016-04-26 13:52:00 +0200 | [diff] [blame] | 4300 | default: |
| 4301 | dev_warn(ctrl->device, "async event result %08x\n", result); |
| 4302 | } |
Christoph Hellwig | 868c239 | 2018-05-22 11:09:54 +0200 | [diff] [blame] | 4303 | } |
| 4304 | |
Christoph Hellwig | f866fc42 | 2016-04-26 13:52:00 +0200 | [diff] [blame] | 4305 | void nvme_complete_async_event(struct nvme_ctrl *ctrl, __le16 status, |
Christoph Hellwig | f866fc42 | 2016-04-26 13:52:00 +0200 | [diff] [blame] | 4306 | volatile union nvme_result *res) |
Christoph Hellwig | f866fc42 | 2016-04-26 13:52:00 +0200 | [diff] [blame] | 4307 | { |
| 4308 | u32 result = le32_to_cpu(res->u32); |
Chaitanya Kulkarni | 09bd1ff | 2018-09-17 10:47:06 -0700 | [diff] [blame] | 4309 | u32 aer_type = result & 0x07; |
Christoph Hellwig | f866fc42 | 2016-04-26 13:52:00 +0200 | [diff] [blame] | 4310 | |
| 4311 | if (le16_to_cpu(status) >> 1 != NVME_SC_SUCCESS) |
| 4312 | return; |
| 4313 | |
Chaitanya Kulkarni | 09bd1ff | 2018-09-17 10:47:06 -0700 | [diff] [blame] | 4314 | switch (aer_type) { |
Christoph Hellwig | 868c239 | 2018-05-22 11:09:54 +0200 | [diff] [blame] | 4315 | case NVME_AER_NOTICE: |
| 4316 | nvme_handle_aen_notice(ctrl, result); |
| 4317 | break; |
Christoph Hellwig | f866fc42 | 2016-04-26 13:52:00 +0200 | [diff] [blame] | 4318 | case NVME_AER_ERROR: |
| 4319 | case NVME_AER_SMART: |
| 4320 | case NVME_AER_CSS: |
| 4321 | case NVME_AER_VS: |
Chaitanya Kulkarni | 09bd1ff | 2018-09-17 10:47:06 -0700 | [diff] [blame] | 4322 | trace_nvme_async_event(ctrl, aer_type); |
Christoph Hellwig | f866fc42 | 2016-04-26 13:52:00 +0200 | [diff] [blame] | 4323 | ctrl->aen_result = result; |
| 4324 | break; |
| 4325 | default: |
| 4326 | break; |
| 4327 | } |
Sagi Grimberg | c669ccd | 2017-05-04 13:33:14 +0300 | [diff] [blame] | 4328 | queue_work(nvme_wq, &ctrl->async_event_work); |
Christoph Hellwig | f866fc42 | 2016-04-26 13:52:00 +0200 | [diff] [blame] | 4329 | } |
Christoph Hellwig | f866fc42 | 2016-04-26 13:52:00 +0200 | [diff] [blame] | 4330 | EXPORT_SYMBOL_GPL(nvme_complete_async_event); |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 4331 | |
Sagi Grimberg | d09f2b4 | 2017-07-02 10:56:43 +0300 | [diff] [blame] | 4332 | void nvme_stop_ctrl(struct nvme_ctrl *ctrl) |
Ming Lin | 576d55d | 2016-02-10 10:03:32 -0800 | [diff] [blame] | 4333 | { |
Christoph Hellwig | 0d0b660 | 2018-05-14 08:48:54 +0200 | [diff] [blame] | 4334 | nvme_mpath_stop(ctrl); |
Sagi Grimberg | d09f2b4 | 2017-07-02 10:56:43 +0300 | [diff] [blame] | 4335 | nvme_stop_keep_alive(ctrl); |
Christoph Hellwig | f866fc42 | 2016-04-26 13:52:00 +0200 | [diff] [blame] | 4336 | flush_work(&ctrl->async_event_work); |
Arnav Dawn | b6dccf7 | 2017-07-12 16:10:40 +0530 | [diff] [blame] | 4337 | cancel_work_sync(&ctrl->fw_act_work); |
Sagi Grimberg | d09f2b4 | 2017-07-02 10:56:43 +0300 | [diff] [blame] | 4338 | } |
| 4339 | EXPORT_SYMBOL_GPL(nvme_stop_ctrl); |
Christoph Hellwig | 5955be2 | 2016-04-26 13:51:59 +0200 | [diff] [blame] | 4340 | |
Sagi Grimberg | d09f2b4 | 2017-07-02 10:56:43 +0300 | [diff] [blame] | 4341 | void nvme_start_ctrl(struct nvme_ctrl *ctrl) |
| 4342 | { |
Baolin Wang | 5887450 | 2020-07-13 14:25:21 +0800 | [diff] [blame] | 4343 | nvme_start_keep_alive(ctrl); |
Sagi Grimberg | d09f2b4 | 2017-07-02 10:56:43 +0300 | [diff] [blame] | 4344 | |
Sagi Grimberg | 93da402 | 2019-08-22 11:25:46 -0700 | [diff] [blame] | 4345 | nvme_enable_aen(ctrl); |
| 4346 | |
Sagi Grimberg | d09f2b4 | 2017-07-02 10:56:43 +0300 | [diff] [blame] | 4347 | if (ctrl->queue_count > 1) { |
| 4348 | nvme_queue_scan(ctrl); |
Sagi Grimberg | d09f2b4 | 2017-07-02 10:56:43 +0300 | [diff] [blame] | 4349 | nvme_start_queues(ctrl); |
| 4350 | } |
Israel Rukshin | ce15181 | 2020-03-24 17:29:43 +0200 | [diff] [blame] | 4351 | ctrl->created = true; |
Sagi Grimberg | d09f2b4 | 2017-07-02 10:56:43 +0300 | [diff] [blame] | 4352 | } |
| 4353 | EXPORT_SYMBOL_GPL(nvme_start_ctrl); |
| 4354 | |
| 4355 | void nvme_uninit_ctrl(struct nvme_ctrl *ctrl) |
| 4356 | { |
Akinobu Mita | f79d5fd | 2019-06-09 23:17:01 +0900 | [diff] [blame] | 4357 | nvme_fault_inject_fini(&ctrl->fault_inject); |
Yufen Yu | 510a405 | 2019-05-16 19:30:07 -0700 | [diff] [blame] | 4358 | dev_pm_qos_hide_latency_tolerance(ctrl->device); |
Christoph Hellwig | a6a5149 | 2017-10-18 16:59:25 +0200 | [diff] [blame] | 4359 | cdev_device_del(&ctrl->cdev, ctrl->device); |
Israel Rukshin | 726612b | 2020-03-24 17:29:42 +0200 | [diff] [blame] | 4360 | nvme_put_ctrl(ctrl); |
Keith Busch | 53029b0 | 2015-11-28 15:41:02 +0100 | [diff] [blame] | 4361 | } |
Ming Lin | 576d55d | 2016-02-10 10:03:32 -0800 | [diff] [blame] | 4362 | EXPORT_SYMBOL_GPL(nvme_uninit_ctrl); |
Keith Busch | 53029b0 | 2015-11-28 15:41:02 +0100 | [diff] [blame] | 4363 | |
Christoph Hellwig | d22524a | 2017-10-18 13:25:42 +0200 | [diff] [blame] | 4364 | static void nvme_free_ctrl(struct device *dev) |
Keith Busch | 53029b0 | 2015-11-28 15:41:02 +0100 | [diff] [blame] | 4365 | { |
Christoph Hellwig | d22524a | 2017-10-18 13:25:42 +0200 | [diff] [blame] | 4366 | struct nvme_ctrl *ctrl = |
| 4367 | container_of(dev, struct nvme_ctrl, ctrl_device); |
Christoph Hellwig | ab9e00c | 2017-11-09 13:48:55 +0100 | [diff] [blame] | 4368 | struct nvme_subsystem *subsys = ctrl->subsys; |
Keith Busch | be93e87 | 2020-06-29 12:06:40 -0700 | [diff] [blame] | 4369 | struct nvme_cel *cel, *next; |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 4370 | |
Keith Busch | 733e4b6 | 2019-09-05 10:33:54 -0600 | [diff] [blame] | 4371 | if (subsys && ctrl->instance != subsys->instance) |
| 4372 | ida_simple_remove(&nvme_instance_ida, ctrl->instance); |
| 4373 | |
Keith Busch | be93e87 | 2020-06-29 12:06:40 -0700 | [diff] [blame] | 4374 | list_for_each_entry_safe(cel, next, &ctrl->cels, entry) { |
| 4375 | list_del(&cel->entry); |
| 4376 | kfree(cel); |
| 4377 | } |
| 4378 | |
Christoph Hellwig | 0d0b660 | 2018-05-14 08:48:54 +0200 | [diff] [blame] | 4379 | nvme_mpath_uninit(ctrl); |
Sagi Grimberg | 092ff05 | 2018-12-13 12:34:07 -0800 | [diff] [blame] | 4380 | __free_page(ctrl->discard_page); |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 4381 | |
Christoph Hellwig | ab9e00c | 2017-11-09 13:48:55 +0100 | [diff] [blame] | 4382 | if (subsys) { |
Christoph Hellwig | 32fd90c | 2019-05-08 09:48:27 +0200 | [diff] [blame] | 4383 | mutex_lock(&nvme_subsystems_lock); |
Christoph Hellwig | ab9e00c | 2017-11-09 13:48:55 +0100 | [diff] [blame] | 4384 | list_del(&ctrl->subsys_entry); |
Christoph Hellwig | ab9e00c | 2017-11-09 13:48:55 +0100 | [diff] [blame] | 4385 | sysfs_remove_link(&subsys->dev.kobj, dev_name(ctrl->device)); |
Christoph Hellwig | 32fd90c | 2019-05-08 09:48:27 +0200 | [diff] [blame] | 4386 | mutex_unlock(&nvme_subsystems_lock); |
Christoph Hellwig | ab9e00c | 2017-11-09 13:48:55 +0100 | [diff] [blame] | 4387 | } |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 4388 | |
| 4389 | ctrl->ops->free_ctrl(ctrl); |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 4390 | |
Christoph Hellwig | ab9e00c | 2017-11-09 13:48:55 +0100 | [diff] [blame] | 4391 | if (subsys) |
| 4392 | nvme_put_subsystem(subsys); |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 4393 | } |
| 4394 | |
| 4395 | /* |
| 4396 | * Initialize a NVMe controller structures. This needs to be called during |
| 4397 | * earliest initialization so that we have the initialized structured around |
| 4398 | * during probing. |
| 4399 | */ |
| 4400 | int nvme_init_ctrl(struct nvme_ctrl *ctrl, struct device *dev, |
| 4401 | const struct nvme_ctrl_ops *ops, unsigned long quirks) |
| 4402 | { |
| 4403 | int ret; |
| 4404 | |
Christoph Hellwig | bb8d261 | 2016-04-26 13:51:57 +0200 | [diff] [blame] | 4405 | ctrl->state = NVME_CTRL_NEW; |
| 4406 | spin_lock_init(&ctrl->lock); |
Keith Busch | e7ad43c | 2019-01-28 09:46:07 -0700 | [diff] [blame] | 4407 | mutex_init(&ctrl->scan_lock); |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 4408 | INIT_LIST_HEAD(&ctrl->namespaces); |
Keith Busch | be93e87 | 2020-06-29 12:06:40 -0700 | [diff] [blame] | 4409 | INIT_LIST_HEAD(&ctrl->cels); |
Jianchao Wang | 765cc031 | 2018-02-12 20:54:46 +0800 | [diff] [blame] | 4410 | init_rwsem(&ctrl->namespaces_rwsem); |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 4411 | ctrl->dev = dev; |
| 4412 | ctrl->ops = ops; |
| 4413 | ctrl->quirks = quirks; |
Max Gurtovoy | 4fea243 | 2020-06-16 12:34:21 +0300 | [diff] [blame] | 4414 | ctrl->numa_node = NUMA_NO_NODE; |
Christoph Hellwig | 5955be2 | 2016-04-26 13:51:59 +0200 | [diff] [blame] | 4415 | INIT_WORK(&ctrl->scan_work, nvme_scan_work); |
Christoph Hellwig | f866fc42 | 2016-04-26 13:52:00 +0200 | [diff] [blame] | 4416 | INIT_WORK(&ctrl->async_event_work, nvme_async_event_work); |
Arnav Dawn | b6dccf7 | 2017-07-12 16:10:40 +0530 | [diff] [blame] | 4417 | INIT_WORK(&ctrl->fw_act_work, nvme_fw_act_work); |
Christoph Hellwig | c5017e8 | 2017-10-29 10:44:29 +0200 | [diff] [blame] | 4418 | INIT_WORK(&ctrl->delete_work, nvme_delete_ctrl_work); |
Keith Busch | c1ac9a4b | 2019-09-04 10:06:11 -0600 | [diff] [blame] | 4419 | init_waitqueue_head(&ctrl->state_wq); |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 4420 | |
James Smart | 230f1f9 | 2018-06-12 16:28:24 -0700 | [diff] [blame] | 4421 | INIT_DELAYED_WORK(&ctrl->ka_work, nvme_keep_alive_work); |
| 4422 | memset(&ctrl->ka_cmd, 0, sizeof(ctrl->ka_cmd)); |
| 4423 | ctrl->ka_cmd.common.opcode = nvme_admin_keep_alive; |
| 4424 | |
Jens Axboe | cb5b726 | 2018-12-12 09:18:11 -0700 | [diff] [blame] | 4425 | BUILD_BUG_ON(NVME_DSM_MAX_RANGES * sizeof(struct nvme_dsm_range) > |
| 4426 | PAGE_SIZE); |
| 4427 | ctrl->discard_page = alloc_page(GFP_KERNEL); |
| 4428 | if (!ctrl->discard_page) { |
| 4429 | ret = -ENOMEM; |
| 4430 | goto out; |
| 4431 | } |
| 4432 | |
Christoph Hellwig | 9843f68 | 2017-10-18 13:10:01 +0200 | [diff] [blame] | 4433 | ret = ida_simple_get(&nvme_instance_ida, 0, 0, GFP_KERNEL); |
| 4434 | if (ret < 0) |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 4435 | goto out; |
Christoph Hellwig | 9843f68 | 2017-10-18 13:10:01 +0200 | [diff] [blame] | 4436 | ctrl->instance = ret; |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 4437 | |
Christoph Hellwig | d22524a | 2017-10-18 13:25:42 +0200 | [diff] [blame] | 4438 | device_initialize(&ctrl->ctrl_device); |
| 4439 | ctrl->device = &ctrl->ctrl_device; |
Christoph Hellwig | a6a5149 | 2017-10-18 16:59:25 +0200 | [diff] [blame] | 4440 | ctrl->device->devt = MKDEV(MAJOR(nvme_chr_devt), ctrl->instance); |
Christoph Hellwig | d22524a | 2017-10-18 13:25:42 +0200 | [diff] [blame] | 4441 | ctrl->device->class = nvme_class; |
| 4442 | ctrl->device->parent = ctrl->dev; |
| 4443 | ctrl->device->groups = nvme_dev_attr_groups; |
| 4444 | ctrl->device->release = nvme_free_ctrl; |
| 4445 | dev_set_drvdata(ctrl->device, ctrl); |
| 4446 | ret = dev_set_name(ctrl->device, "nvme%d", ctrl->instance); |
| 4447 | if (ret) |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 4448 | goto out_release_instance; |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 4449 | |
Israel Rukshin | b780d74 | 2020-03-24 17:29:41 +0200 | [diff] [blame] | 4450 | nvme_get_ctrl(ctrl); |
Christoph Hellwig | a6a5149 | 2017-10-18 16:59:25 +0200 | [diff] [blame] | 4451 | cdev_init(&ctrl->cdev, &nvme_dev_fops); |
| 4452 | ctrl->cdev.owner = ops->module; |
| 4453 | ret = cdev_device_add(&ctrl->cdev, ctrl->device); |
Christoph Hellwig | d22524a | 2017-10-18 13:25:42 +0200 | [diff] [blame] | 4454 | if (ret) |
| 4455 | goto out_free_name; |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 4456 | |
Andy Lutomirski | c5552fd | 2017-02-07 10:08:45 -0800 | [diff] [blame] | 4457 | /* |
| 4458 | * Initialize latency tolerance controls. The sysfs files won't |
| 4459 | * be visible to userspace unless the device actually supports APST. |
| 4460 | */ |
| 4461 | ctrl->device->power.set_latency_tolerance = nvme_set_latency_tolerance; |
| 4462 | dev_pm_qos_update_user_latency_tolerance(ctrl->device, |
| 4463 | min(default_ps_max_latency_us, (unsigned long)S32_MAX)); |
| 4464 | |
Akinobu Mita | f79d5fd | 2019-06-09 23:17:01 +0900 | [diff] [blame] | 4465 | nvme_fault_inject_init(&ctrl->fault_inject, dev_name(ctrl->device)); |
| 4466 | |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 4467 | return 0; |
Christoph Hellwig | d22524a | 2017-10-18 13:25:42 +0200 | [diff] [blame] | 4468 | out_free_name: |
Israel Rukshin | b780d74 | 2020-03-24 17:29:41 +0200 | [diff] [blame] | 4469 | nvme_put_ctrl(ctrl); |
Keith Busch | d6a2b953 | 2018-11-26 16:39:47 -0700 | [diff] [blame] | 4470 | kfree_const(ctrl->device->kobj.name); |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 4471 | out_release_instance: |
Christoph Hellwig | 9843f68 | 2017-10-18 13:10:01 +0200 | [diff] [blame] | 4472 | ida_simple_remove(&nvme_instance_ida, ctrl->instance); |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 4473 | out: |
Jens Axboe | cb5b726 | 2018-12-12 09:18:11 -0700 | [diff] [blame] | 4474 | if (ctrl->discard_page) |
| 4475 | __free_page(ctrl->discard_page); |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 4476 | return ret; |
| 4477 | } |
Ming Lin | 576d55d | 2016-02-10 10:03:32 -0800 | [diff] [blame] | 4478 | EXPORT_SYMBOL_GPL(nvme_init_ctrl); |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 4479 | |
Keith Busch | 69d9a99 | 2016-02-24 09:15:56 -0700 | [diff] [blame] | 4480 | /** |
| 4481 | * nvme_kill_queues(): Ends all namespace queues |
| 4482 | * @ctrl: the dead controller that needs to end |
| 4483 | * |
| 4484 | * Call this function when the driver determines it is unable to get the |
| 4485 | * controller in a state capable of servicing IO. |
| 4486 | */ |
| 4487 | void nvme_kill_queues(struct nvme_ctrl *ctrl) |
| 4488 | { |
| 4489 | struct nvme_ns *ns; |
| 4490 | |
Jianchao Wang | 765cc031 | 2018-02-12 20:54:46 +0800 | [diff] [blame] | 4491 | down_read(&ctrl->namespaces_rwsem); |
Ming Lei | 82654b6 | 2017-06-02 16:32:08 +0800 | [diff] [blame] | 4492 | |
Ming Lei | 443bd90 | 2017-06-19 10:21:08 +0800 | [diff] [blame] | 4493 | /* Forcibly unquiesce queues to avoid blocking dispatch */ |
Igor Konopko | 751a0cc | 2018-11-23 16:58:10 +0100 | [diff] [blame] | 4494 | if (ctrl->admin_q && !blk_queue_dying(ctrl->admin_q)) |
Scott Bauer | 7dd1ab1 | 2017-07-25 10:27:06 -0600 | [diff] [blame] | 4495 | blk_mq_unquiesce_queue(ctrl->admin_q); |
Ming Lei | 443bd90 | 2017-06-19 10:21:08 +0800 | [diff] [blame] | 4496 | |
Scott Bauer | cf39a6b | 2018-06-29 13:03:28 -0600 | [diff] [blame] | 4497 | list_for_each_entry(ns, &ctrl->namespaces, list) |
| 4498 | nvme_set_queue_dying(ns); |
Ming Lei | 806f026 | 2017-05-22 23:05:03 +0800 | [diff] [blame] | 4499 | |
Jianchao Wang | 765cc031 | 2018-02-12 20:54:46 +0800 | [diff] [blame] | 4500 | up_read(&ctrl->namespaces_rwsem); |
Keith Busch | 69d9a99 | 2016-02-24 09:15:56 -0700 | [diff] [blame] | 4501 | } |
Linus Torvalds | 237045f | 2016-03-18 17:13:31 -0700 | [diff] [blame] | 4502 | EXPORT_SYMBOL_GPL(nvme_kill_queues); |
Keith Busch | 69d9a99 | 2016-02-24 09:15:56 -0700 | [diff] [blame] | 4503 | |
Keith Busch | 302ad8c | 2017-03-01 14:22:12 -0500 | [diff] [blame] | 4504 | void nvme_unfreeze(struct nvme_ctrl *ctrl) |
| 4505 | { |
| 4506 | struct nvme_ns *ns; |
| 4507 | |
Jianchao Wang | 765cc031 | 2018-02-12 20:54:46 +0800 | [diff] [blame] | 4508 | down_read(&ctrl->namespaces_rwsem); |
Keith Busch | 302ad8c | 2017-03-01 14:22:12 -0500 | [diff] [blame] | 4509 | list_for_each_entry(ns, &ctrl->namespaces, list) |
| 4510 | blk_mq_unfreeze_queue(ns->queue); |
Jianchao Wang | 765cc031 | 2018-02-12 20:54:46 +0800 | [diff] [blame] | 4511 | up_read(&ctrl->namespaces_rwsem); |
Keith Busch | 302ad8c | 2017-03-01 14:22:12 -0500 | [diff] [blame] | 4512 | } |
| 4513 | EXPORT_SYMBOL_GPL(nvme_unfreeze); |
| 4514 | |
| 4515 | void nvme_wait_freeze_timeout(struct nvme_ctrl *ctrl, long timeout) |
| 4516 | { |
| 4517 | struct nvme_ns *ns; |
| 4518 | |
Jianchao Wang | 765cc031 | 2018-02-12 20:54:46 +0800 | [diff] [blame] | 4519 | down_read(&ctrl->namespaces_rwsem); |
Keith Busch | 302ad8c | 2017-03-01 14:22:12 -0500 | [diff] [blame] | 4520 | list_for_each_entry(ns, &ctrl->namespaces, list) { |
| 4521 | timeout = blk_mq_freeze_queue_wait_timeout(ns->queue, timeout); |
| 4522 | if (timeout <= 0) |
| 4523 | break; |
| 4524 | } |
Jianchao Wang | 765cc031 | 2018-02-12 20:54:46 +0800 | [diff] [blame] | 4525 | up_read(&ctrl->namespaces_rwsem); |
Keith Busch | 302ad8c | 2017-03-01 14:22:12 -0500 | [diff] [blame] | 4526 | } |
| 4527 | EXPORT_SYMBOL_GPL(nvme_wait_freeze_timeout); |
| 4528 | |
| 4529 | void nvme_wait_freeze(struct nvme_ctrl *ctrl) |
| 4530 | { |
| 4531 | struct nvme_ns *ns; |
| 4532 | |
Jianchao Wang | 765cc031 | 2018-02-12 20:54:46 +0800 | [diff] [blame] | 4533 | down_read(&ctrl->namespaces_rwsem); |
Keith Busch | 302ad8c | 2017-03-01 14:22:12 -0500 | [diff] [blame] | 4534 | list_for_each_entry(ns, &ctrl->namespaces, list) |
| 4535 | blk_mq_freeze_queue_wait(ns->queue); |
Jianchao Wang | 765cc031 | 2018-02-12 20:54:46 +0800 | [diff] [blame] | 4536 | up_read(&ctrl->namespaces_rwsem); |
Keith Busch | 302ad8c | 2017-03-01 14:22:12 -0500 | [diff] [blame] | 4537 | } |
| 4538 | EXPORT_SYMBOL_GPL(nvme_wait_freeze); |
| 4539 | |
| 4540 | void nvme_start_freeze(struct nvme_ctrl *ctrl) |
| 4541 | { |
| 4542 | struct nvme_ns *ns; |
| 4543 | |
Jianchao Wang | 765cc031 | 2018-02-12 20:54:46 +0800 | [diff] [blame] | 4544 | down_read(&ctrl->namespaces_rwsem); |
Keith Busch | 302ad8c | 2017-03-01 14:22:12 -0500 | [diff] [blame] | 4545 | list_for_each_entry(ns, &ctrl->namespaces, list) |
Ming Lei | 1671d52 | 2017-03-27 20:06:57 +0800 | [diff] [blame] | 4546 | blk_freeze_queue_start(ns->queue); |
Jianchao Wang | 765cc031 | 2018-02-12 20:54:46 +0800 | [diff] [blame] | 4547 | up_read(&ctrl->namespaces_rwsem); |
Keith Busch | 302ad8c | 2017-03-01 14:22:12 -0500 | [diff] [blame] | 4548 | } |
| 4549 | EXPORT_SYMBOL_GPL(nvme_start_freeze); |
| 4550 | |
Keith Busch | 2564626 | 2016-01-04 09:10:57 -0700 | [diff] [blame] | 4551 | void nvme_stop_queues(struct nvme_ctrl *ctrl) |
Sagi Grimberg | 363c9aa | 2015-12-24 15:26:59 +0100 | [diff] [blame] | 4552 | { |
| 4553 | struct nvme_ns *ns; |
| 4554 | |
Jianchao Wang | 765cc031 | 2018-02-12 20:54:46 +0800 | [diff] [blame] | 4555 | down_read(&ctrl->namespaces_rwsem); |
Bart Van Assche | a6eaa88 | 2016-10-28 17:23:40 -0700 | [diff] [blame] | 4556 | list_for_each_entry(ns, &ctrl->namespaces, list) |
Bart Van Assche | 3174dd3 | 2016-10-28 17:23:19 -0700 | [diff] [blame] | 4557 | blk_mq_quiesce_queue(ns->queue); |
Jianchao Wang | 765cc031 | 2018-02-12 20:54:46 +0800 | [diff] [blame] | 4558 | up_read(&ctrl->namespaces_rwsem); |
Sagi Grimberg | 363c9aa | 2015-12-24 15:26:59 +0100 | [diff] [blame] | 4559 | } |
Ming Lin | 576d55d | 2016-02-10 10:03:32 -0800 | [diff] [blame] | 4560 | EXPORT_SYMBOL_GPL(nvme_stop_queues); |
Sagi Grimberg | 363c9aa | 2015-12-24 15:26:59 +0100 | [diff] [blame] | 4561 | |
Keith Busch | 2564626 | 2016-01-04 09:10:57 -0700 | [diff] [blame] | 4562 | void nvme_start_queues(struct nvme_ctrl *ctrl) |
Sagi Grimberg | 363c9aa | 2015-12-24 15:26:59 +0100 | [diff] [blame] | 4563 | { |
| 4564 | struct nvme_ns *ns; |
| 4565 | |
Jianchao Wang | 765cc031 | 2018-02-12 20:54:46 +0800 | [diff] [blame] | 4566 | down_read(&ctrl->namespaces_rwsem); |
Sagi Grimberg | 8d7b8fa | 2017-07-04 18:16:58 +0300 | [diff] [blame] | 4567 | list_for_each_entry(ns, &ctrl->namespaces, list) |
Ming Lei | f660174 | 2017-06-06 23:22:04 +0800 | [diff] [blame] | 4568 | blk_mq_unquiesce_queue(ns->queue); |
Jianchao Wang | 765cc031 | 2018-02-12 20:54:46 +0800 | [diff] [blame] | 4569 | up_read(&ctrl->namespaces_rwsem); |
Sagi Grimberg | 363c9aa | 2015-12-24 15:26:59 +0100 | [diff] [blame] | 4570 | } |
Ming Lin | 576d55d | 2016-02-10 10:03:32 -0800 | [diff] [blame] | 4571 | EXPORT_SYMBOL_GPL(nvme_start_queues); |
Sagi Grimberg | 363c9aa | 2015-12-24 15:26:59 +0100 | [diff] [blame] | 4572 | |
Keith Busch | d6135c3a | 2019-05-14 14:46:09 -0600 | [diff] [blame] | 4573 | |
| 4574 | void nvme_sync_queues(struct nvme_ctrl *ctrl) |
| 4575 | { |
| 4576 | struct nvme_ns *ns; |
| 4577 | |
| 4578 | down_read(&ctrl->namespaces_rwsem); |
| 4579 | list_for_each_entry(ns, &ctrl->namespaces, list) |
| 4580 | blk_sync_queue(ns->queue); |
| 4581 | up_read(&ctrl->namespaces_rwsem); |
Edmund Nadolski | 03894b7a | 2019-09-03 14:08:47 -0600 | [diff] [blame] | 4582 | |
| 4583 | if (ctrl->admin_q) |
| 4584 | blk_sync_queue(ctrl->admin_q); |
Keith Busch | d6135c3a | 2019-05-14 14:46:09 -0600 | [diff] [blame] | 4585 | } |
| 4586 | EXPORT_SYMBOL_GPL(nvme_sync_queues); |
| 4587 | |
Logan Gunthorpe | f783f44 | 2020-07-24 11:25:15 -0600 | [diff] [blame] | 4588 | struct nvme_ctrl *nvme_ctrl_get_by_path(const char *path) |
| 4589 | { |
| 4590 | struct nvme_ctrl *ctrl; |
| 4591 | struct file *f; |
| 4592 | |
| 4593 | f = filp_open(path, O_RDWR, 0); |
| 4594 | if (IS_ERR(f)) |
| 4595 | return ERR_CAST(f); |
| 4596 | |
| 4597 | if (f->f_op != &nvme_dev_fops) { |
| 4598 | ctrl = ERR_PTR(-EINVAL); |
| 4599 | goto out_close; |
| 4600 | } |
| 4601 | |
| 4602 | ctrl = f->private_data; |
| 4603 | nvme_get_ctrl(ctrl); |
| 4604 | |
| 4605 | out_close: |
| 4606 | filp_close(f, NULL); |
| 4607 | return ctrl; |
| 4608 | } |
| 4609 | EXPORT_SYMBOL_NS_GPL(nvme_ctrl_get_by_path, NVME_TARGET_PASSTHRU); |
| 4610 | |
Christoph Hellwig | 8110154 | 2019-04-30 11:36:52 -0400 | [diff] [blame] | 4611 | /* |
| 4612 | * Check we didn't inadvertently grow the command structure sizes: |
| 4613 | */ |
| 4614 | static inline void _nvme_check_size(void) |
| 4615 | { |
| 4616 | BUILD_BUG_ON(sizeof(struct nvme_common_command) != 64); |
| 4617 | BUILD_BUG_ON(sizeof(struct nvme_rw_command) != 64); |
| 4618 | BUILD_BUG_ON(sizeof(struct nvme_identify) != 64); |
| 4619 | BUILD_BUG_ON(sizeof(struct nvme_features) != 64); |
| 4620 | BUILD_BUG_ON(sizeof(struct nvme_download_firmware) != 64); |
| 4621 | BUILD_BUG_ON(sizeof(struct nvme_format_cmd) != 64); |
| 4622 | BUILD_BUG_ON(sizeof(struct nvme_dsm_cmd) != 64); |
| 4623 | BUILD_BUG_ON(sizeof(struct nvme_write_zeroes_cmd) != 64); |
| 4624 | BUILD_BUG_ON(sizeof(struct nvme_abort_cmd) != 64); |
| 4625 | BUILD_BUG_ON(sizeof(struct nvme_get_log_page_command) != 64); |
| 4626 | BUILD_BUG_ON(sizeof(struct nvme_command) != 64); |
| 4627 | BUILD_BUG_ON(sizeof(struct nvme_id_ctrl) != NVME_IDENTIFY_DATA_SIZE); |
| 4628 | BUILD_BUG_ON(sizeof(struct nvme_id_ns) != NVME_IDENTIFY_DATA_SIZE); |
Keith Busch | 240e6ee | 2020-06-29 12:06:41 -0700 | [diff] [blame] | 4629 | BUILD_BUG_ON(sizeof(struct nvme_id_ns_zns) != NVME_IDENTIFY_DATA_SIZE); |
| 4630 | BUILD_BUG_ON(sizeof(struct nvme_id_ctrl_zns) != NVME_IDENTIFY_DATA_SIZE); |
Christoph Hellwig | 8110154 | 2019-04-30 11:36:52 -0400 | [diff] [blame] | 4631 | BUILD_BUG_ON(sizeof(struct nvme_lba_range_type) != 64); |
| 4632 | BUILD_BUG_ON(sizeof(struct nvme_smart_log) != 512); |
| 4633 | BUILD_BUG_ON(sizeof(struct nvme_dbbuf) != 64); |
| 4634 | BUILD_BUG_ON(sizeof(struct nvme_directive_cmd) != 64); |
| 4635 | } |
| 4636 | |
| 4637 | |
Christoph Hellwig | 893a74b | 2019-04-30 11:37:43 -0400 | [diff] [blame] | 4638 | static int __init nvme_core_init(void) |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 4639 | { |
Roy Shterman | b227c59 | 2018-01-14 12:39:02 +0200 | [diff] [blame] | 4640 | int result = -ENOMEM; |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 4641 | |
Christoph Hellwig | 8110154 | 2019-04-30 11:36:52 -0400 | [diff] [blame] | 4642 | _nvme_check_size(); |
| 4643 | |
Sagi Grimberg | 9a6327d | 2017-06-07 20:31:55 +0200 | [diff] [blame] | 4644 | nvme_wq = alloc_workqueue("nvme-wq", |
| 4645 | WQ_UNBOUND | WQ_MEM_RECLAIM | WQ_SYSFS, 0); |
| 4646 | if (!nvme_wq) |
Roy Shterman | b227c59 | 2018-01-14 12:39:02 +0200 | [diff] [blame] | 4647 | goto out; |
| 4648 | |
| 4649 | nvme_reset_wq = alloc_workqueue("nvme-reset-wq", |
| 4650 | WQ_UNBOUND | WQ_MEM_RECLAIM | WQ_SYSFS, 0); |
| 4651 | if (!nvme_reset_wq) |
| 4652 | goto destroy_wq; |
| 4653 | |
| 4654 | nvme_delete_wq = alloc_workqueue("nvme-delete-wq", |
| 4655 | WQ_UNBOUND | WQ_MEM_RECLAIM | WQ_SYSFS, 0); |
| 4656 | if (!nvme_delete_wq) |
| 4657 | goto destroy_reset_wq; |
Sagi Grimberg | 9a6327d | 2017-06-07 20:31:55 +0200 | [diff] [blame] | 4658 | |
Christoph Hellwig | a6a5149 | 2017-10-18 16:59:25 +0200 | [diff] [blame] | 4659 | result = alloc_chrdev_region(&nvme_chr_devt, 0, NVME_MINORS, "nvme"); |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 4660 | if (result < 0) |
Roy Shterman | b227c59 | 2018-01-14 12:39:02 +0200 | [diff] [blame] | 4661 | goto destroy_delete_wq; |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 4662 | |
| 4663 | nvme_class = class_create(THIS_MODULE, "nvme"); |
| 4664 | if (IS_ERR(nvme_class)) { |
| 4665 | result = PTR_ERR(nvme_class); |
| 4666 | goto unregister_chrdev; |
| 4667 | } |
Sagi Grimberg | a42f42e | 2019-09-04 14:29:48 -0700 | [diff] [blame] | 4668 | nvme_class->dev_uevent = nvme_class_uevent; |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 4669 | |
Christoph Hellwig | ab9e00c | 2017-11-09 13:48:55 +0100 | [diff] [blame] | 4670 | nvme_subsys_class = class_create(THIS_MODULE, "nvme-subsystem"); |
| 4671 | if (IS_ERR(nvme_subsys_class)) { |
| 4672 | result = PTR_ERR(nvme_subsys_class); |
| 4673 | goto destroy_class; |
| 4674 | } |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 4675 | return 0; |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 4676 | |
Christoph Hellwig | ab9e00c | 2017-11-09 13:48:55 +0100 | [diff] [blame] | 4677 | destroy_class: |
| 4678 | class_destroy(nvme_class); |
Sagi Grimberg | 9a6327d | 2017-06-07 20:31:55 +0200 | [diff] [blame] | 4679 | unregister_chrdev: |
Christoph Hellwig | a6a5149 | 2017-10-18 16:59:25 +0200 | [diff] [blame] | 4680 | unregister_chrdev_region(nvme_chr_devt, NVME_MINORS); |
Roy Shterman | b227c59 | 2018-01-14 12:39:02 +0200 | [diff] [blame] | 4681 | destroy_delete_wq: |
| 4682 | destroy_workqueue(nvme_delete_wq); |
| 4683 | destroy_reset_wq: |
| 4684 | destroy_workqueue(nvme_reset_wq); |
Sagi Grimberg | 9a6327d | 2017-06-07 20:31:55 +0200 | [diff] [blame] | 4685 | destroy_wq: |
| 4686 | destroy_workqueue(nvme_wq); |
Roy Shterman | b227c59 | 2018-01-14 12:39:02 +0200 | [diff] [blame] | 4687 | out: |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 4688 | return result; |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 4689 | } |
| 4690 | |
Christoph Hellwig | 893a74b | 2019-04-30 11:37:43 -0400 | [diff] [blame] | 4691 | static void __exit nvme_core_exit(void) |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 4692 | { |
Christoph Hellwig | ab9e00c | 2017-11-09 13:48:55 +0100 | [diff] [blame] | 4693 | class_destroy(nvme_subsys_class); |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 4694 | class_destroy(nvme_class); |
Christoph Hellwig | a6a5149 | 2017-10-18 16:59:25 +0200 | [diff] [blame] | 4695 | unregister_chrdev_region(nvme_chr_devt, NVME_MINORS); |
Roy Shterman | b227c59 | 2018-01-14 12:39:02 +0200 | [diff] [blame] | 4696 | destroy_workqueue(nvme_delete_wq); |
| 4697 | destroy_workqueue(nvme_reset_wq); |
Sagi Grimberg | 9a6327d | 2017-06-07 20:31:55 +0200 | [diff] [blame] | 4698 | destroy_workqueue(nvme_wq); |
Max Gurtovoy | f41cfd5 | 2020-03-18 17:27:59 +0200 | [diff] [blame] | 4699 | ida_destroy(&nvme_instance_ida); |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 4700 | } |
Ming Lin | 576d55d | 2016-02-10 10:03:32 -0800 | [diff] [blame] | 4701 | |
| 4702 | MODULE_LICENSE("GPL"); |
| 4703 | MODULE_VERSION("1.0"); |
| 4704 | module_init(nvme_core_init); |
| 4705 | module_exit(nvme_core_exit); |