| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * NVM Express device driver |
| * Copyright (c) 2011-2014, Intel Corporation. |
| */ |
| |
| #include <linux/blkdev.h> |
| #include <linux/blk-mq.h> |
| #include <linux/compat.h> |
| #include <linux/delay.h> |
| #include <linux/errno.h> |
| #include <linux/hdreg.h> |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/backing-dev.h> |
| #include <linux/list_sort.h> |
| #include <linux/slab.h> |
| #include <linux/types.h> |
| #include <linux/pr.h> |
| #include <linux/ptrace.h> |
| #include <linux/nvme_ioctl.h> |
| #include <linux/pm_qos.h> |
| #include <asm/unaligned.h> |
| |
| #include "nvme.h" |
| #include "fabrics.h" |
| |
| #define CREATE_TRACE_POINTS |
| #include "trace.h" |
| |
| #define NVME_MINORS (1U << MINORBITS) |
| |
| unsigned int admin_timeout = 60; |
| module_param(admin_timeout, uint, 0644); |
| MODULE_PARM_DESC(admin_timeout, "timeout in seconds for admin commands"); |
| EXPORT_SYMBOL_GPL(admin_timeout); |
| |
| unsigned int nvme_io_timeout = 30; |
| module_param_named(io_timeout, nvme_io_timeout, uint, 0644); |
| MODULE_PARM_DESC(io_timeout, "timeout in seconds for I/O"); |
| EXPORT_SYMBOL_GPL(nvme_io_timeout); |
| |
| static unsigned char shutdown_timeout = 5; |
| module_param(shutdown_timeout, byte, 0644); |
| MODULE_PARM_DESC(shutdown_timeout, "timeout in seconds for controller shutdown"); |
| |
| static u8 nvme_max_retries = 5; |
| module_param_named(max_retries, nvme_max_retries, byte, 0644); |
| MODULE_PARM_DESC(max_retries, "max number of retries a command may have"); |
| |
| static unsigned long default_ps_max_latency_us = 100000; |
| module_param(default_ps_max_latency_us, ulong, 0644); |
| MODULE_PARM_DESC(default_ps_max_latency_us, |
| "max power saving latency for new devices; use PM QOS to change per device"); |
| |
| static bool force_apst; |
| module_param(force_apst, bool, 0644); |
| MODULE_PARM_DESC(force_apst, "allow APST for newly enumerated devices even if quirked off"); |
| |
| static bool streams; |
| module_param(streams, bool, 0644); |
| MODULE_PARM_DESC(streams, "turn on support for Streams write directives"); |
| |
| /* |
| * nvme_wq - hosts nvme related works that are not reset or delete |
| * nvme_reset_wq - hosts nvme reset works |
| * nvme_delete_wq - hosts nvme delete works |
| * |
| * nvme_wq will host works such as scan, aen handling, fw activation, |
| * keep-alive, periodic reconnects etc. nvme_reset_wq |
| * runs reset works which also flush works hosted on nvme_wq for |
| * serialization purposes. nvme_delete_wq host controller deletion |
| * works which flush reset works for serialization. |
| */ |
| struct workqueue_struct *nvme_wq; |
| EXPORT_SYMBOL_GPL(nvme_wq); |
| |
| struct workqueue_struct *nvme_reset_wq; |
| EXPORT_SYMBOL_GPL(nvme_reset_wq); |
| |
| struct workqueue_struct *nvme_delete_wq; |
| EXPORT_SYMBOL_GPL(nvme_delete_wq); |
| |
| static LIST_HEAD(nvme_subsystems); |
| static DEFINE_MUTEX(nvme_subsystems_lock); |
| |
| static DEFINE_IDA(nvme_instance_ida); |
| static dev_t nvme_ctrl_base_chr_devt; |
| static struct class *nvme_class; |
| static struct class *nvme_subsys_class; |
| |
| static void nvme_put_subsystem(struct nvme_subsystem *subsys); |
| static void nvme_remove_invalid_namespaces(struct nvme_ctrl *ctrl, |
| unsigned nsid); |
| |
| /* |
| * Prepare a queue for teardown. |
| * |
| * This must forcibly unquiesce queues to avoid blocking dispatch, and only set |
| * the capacity to 0 after that to avoid blocking dispatchers that may be |
| * holding bd_butex. This will end buffered writers dirtying pages that can't |
| * be synced. |
| */ |
| static void nvme_set_queue_dying(struct nvme_ns *ns) |
| { |
| if (test_and_set_bit(NVME_NS_DEAD, &ns->flags)) |
| return; |
| |
| blk_set_queue_dying(ns->queue); |
| blk_mq_unquiesce_queue(ns->queue); |
| |
| set_capacity_and_notify(ns->disk, 0); |
| } |
| |
| static void nvme_queue_scan(struct nvme_ctrl *ctrl) |
| { |
| /* |
| * Only new queue scan work when admin and IO queues are both alive |
| */ |
| if (ctrl->state == NVME_CTRL_LIVE && ctrl->tagset) |
| queue_work(nvme_wq, &ctrl->scan_work); |
| } |
| |
| /* |
| * Use this function to proceed with scheduling reset_work for a controller |
| * that had previously been set to the resetting state. This is intended for |
| * code paths that can't be interrupted by other reset attempts. A hot removal |
| * may prevent this from succeeding. |
| */ |
| int nvme_try_sched_reset(struct nvme_ctrl *ctrl) |
| { |
| if (ctrl->state != NVME_CTRL_RESETTING) |
| return -EBUSY; |
| if (!queue_work(nvme_reset_wq, &ctrl->reset_work)) |
| return -EBUSY; |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(nvme_try_sched_reset); |
| |
| static void nvme_failfast_work(struct work_struct *work) |
| { |
| struct nvme_ctrl *ctrl = container_of(to_delayed_work(work), |
| struct nvme_ctrl, failfast_work); |
| |
| if (ctrl->state != NVME_CTRL_CONNECTING) |
| return; |
| |
| set_bit(NVME_CTRL_FAILFAST_EXPIRED, &ctrl->flags); |
| dev_info(ctrl->device, "failfast expired\n"); |
| nvme_kick_requeue_lists(ctrl); |
| } |
| |
| static inline void nvme_start_failfast_work(struct nvme_ctrl *ctrl) |
| { |
| if (!ctrl->opts || ctrl->opts->fast_io_fail_tmo == -1) |
| return; |
| |
| schedule_delayed_work(&ctrl->failfast_work, |
| ctrl->opts->fast_io_fail_tmo * HZ); |
| } |
| |
| static inline void nvme_stop_failfast_work(struct nvme_ctrl *ctrl) |
| { |
| if (!ctrl->opts) |
| return; |
| |
| cancel_delayed_work_sync(&ctrl->failfast_work); |
| clear_bit(NVME_CTRL_FAILFAST_EXPIRED, &ctrl->flags); |
| } |
| |
| |
| int nvme_reset_ctrl(struct nvme_ctrl *ctrl) |
| { |
| if (!nvme_change_ctrl_state(ctrl, NVME_CTRL_RESETTING)) |
| return -EBUSY; |
| if (!queue_work(nvme_reset_wq, &ctrl->reset_work)) |
| return -EBUSY; |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(nvme_reset_ctrl); |
| |
| static int nvme_reset_ctrl_sync(struct nvme_ctrl *ctrl) |
| { |
| int ret; |
| |
| ret = nvme_reset_ctrl(ctrl); |
| if (!ret) { |
| flush_work(&ctrl->reset_work); |
| if (ctrl->state != NVME_CTRL_LIVE) |
| ret = -ENETRESET; |
| } |
| |
| return ret; |
| } |
| |
| static void nvme_do_delete_ctrl(struct nvme_ctrl *ctrl) |
| { |
| dev_info(ctrl->device, |
| "Removing ctrl: NQN \"%s\"\n", ctrl->opts->subsysnqn); |
| |
| flush_work(&ctrl->reset_work); |
| nvme_stop_ctrl(ctrl); |
| nvme_remove_namespaces(ctrl); |
| ctrl->ops->delete_ctrl(ctrl); |
| nvme_uninit_ctrl(ctrl); |
| } |
| |
| static void nvme_delete_ctrl_work(struct work_struct *work) |
| { |
| struct nvme_ctrl *ctrl = |
| container_of(work, struct nvme_ctrl, delete_work); |
| |
| nvme_do_delete_ctrl(ctrl); |
| } |
| |
| int nvme_delete_ctrl(struct nvme_ctrl *ctrl) |
| { |
| if (!nvme_change_ctrl_state(ctrl, NVME_CTRL_DELETING)) |
| return -EBUSY; |
| if (!queue_work(nvme_delete_wq, &ctrl->delete_work)) |
| return -EBUSY; |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(nvme_delete_ctrl); |
| |
| static void nvme_delete_ctrl_sync(struct nvme_ctrl *ctrl) |
| { |
| /* |
| * Keep a reference until nvme_do_delete_ctrl() complete, |
| * since ->delete_ctrl can free the controller. |
| */ |
| nvme_get_ctrl(ctrl); |
| if (nvme_change_ctrl_state(ctrl, NVME_CTRL_DELETING)) |
| nvme_do_delete_ctrl(ctrl); |
| nvme_put_ctrl(ctrl); |
| } |
| |
| static blk_status_t nvme_error_status(u16 status) |
| { |
| switch (status & 0x7ff) { |
| case NVME_SC_SUCCESS: |
| return BLK_STS_OK; |
| case NVME_SC_CAP_EXCEEDED: |
| return BLK_STS_NOSPC; |
| case NVME_SC_LBA_RANGE: |
| case NVME_SC_CMD_INTERRUPTED: |
| case NVME_SC_NS_NOT_READY: |
| return BLK_STS_TARGET; |
| case NVME_SC_BAD_ATTRIBUTES: |
| case NVME_SC_ONCS_NOT_SUPPORTED: |
| case NVME_SC_INVALID_OPCODE: |
| case NVME_SC_INVALID_FIELD: |
| case NVME_SC_INVALID_NS: |
| return BLK_STS_NOTSUPP; |
| case NVME_SC_WRITE_FAULT: |
| case NVME_SC_READ_ERROR: |
| case NVME_SC_UNWRITTEN_BLOCK: |
| case NVME_SC_ACCESS_DENIED: |
| case NVME_SC_READ_ONLY: |
| case NVME_SC_COMPARE_FAILED: |
| return BLK_STS_MEDIUM; |
| case NVME_SC_GUARD_CHECK: |
| case NVME_SC_APPTAG_CHECK: |
| case NVME_SC_REFTAG_CHECK: |
| case NVME_SC_INVALID_PI: |
| return BLK_STS_PROTECTION; |
| case NVME_SC_RESERVATION_CONFLICT: |
| return BLK_STS_NEXUS; |
| case NVME_SC_HOST_PATH_ERROR: |
| return BLK_STS_TRANSPORT; |
| case NVME_SC_ZONE_TOO_MANY_ACTIVE: |
| return BLK_STS_ZONE_ACTIVE_RESOURCE; |
| case NVME_SC_ZONE_TOO_MANY_OPEN: |
| return BLK_STS_ZONE_OPEN_RESOURCE; |
| default: |
| return BLK_STS_IOERR; |
| } |
| } |
| |
| static void nvme_retry_req(struct request *req) |
| { |
| struct nvme_ns *ns = req->q->queuedata; |
| unsigned long delay = 0; |
| u16 crd; |
| |
| /* The mask and shift result must be <= 3 */ |
| crd = (nvme_req(req)->status & NVME_SC_CRD) >> 11; |
| if (ns && crd) |
| delay = ns->ctrl->crdt[crd - 1] * 100; |
| |
| nvme_req(req)->retries++; |
| blk_mq_requeue_request(req, false); |
| blk_mq_delay_kick_requeue_list(req->q, delay); |
| } |
| |
| enum nvme_disposition { |
| COMPLETE, |
| RETRY, |
| FAILOVER, |
| }; |
| |
| static inline enum nvme_disposition nvme_decide_disposition(struct request *req) |
| { |
| if (likely(nvme_req(req)->status == 0)) |
| return COMPLETE; |
| |
| if (blk_noretry_request(req) || |
| (nvme_req(req)->status & NVME_SC_DNR) || |
| nvme_req(req)->retries >= nvme_max_retries) |
| return COMPLETE; |
| |
| if (req->cmd_flags & REQ_NVME_MPATH) { |
| if (nvme_is_path_error(nvme_req(req)->status) || |
| blk_queue_dying(req->q)) |
| return FAILOVER; |
| } else { |
| if (blk_queue_dying(req->q)) |
| return COMPLETE; |
| } |
| |
| return RETRY; |
| } |
| |
| static inline void nvme_end_req(struct request *req) |
| { |
| blk_status_t status = nvme_error_status(nvme_req(req)->status); |
| |
| if (IS_ENABLED(CONFIG_BLK_DEV_ZONED) && |
| req_op(req) == REQ_OP_ZONE_APPEND) |
| req->__sector = nvme_lba_to_sect(req->q->queuedata, |
| le64_to_cpu(nvme_req(req)->result.u64)); |
| |
| nvme_trace_bio_complete(req); |
| blk_mq_end_request(req, status); |
| } |
| |
| void nvme_complete_rq(struct request *req) |
| { |
| trace_nvme_complete_rq(req); |
| nvme_cleanup_cmd(req); |
| |
| if (nvme_req(req)->ctrl->kas) |
| nvme_req(req)->ctrl->comp_seen = true; |
| |
| switch (nvme_decide_disposition(req)) { |
| case COMPLETE: |
| nvme_end_req(req); |
| return; |
| case RETRY: |
| nvme_retry_req(req); |
| return; |
| case FAILOVER: |
| nvme_failover_req(req); |
| return; |
| } |
| } |
| EXPORT_SYMBOL_GPL(nvme_complete_rq); |
| |
| bool nvme_cancel_request(struct request *req, void *data, bool reserved) |
| { |
| dev_dbg_ratelimited(((struct nvme_ctrl *) data)->device, |
| "Cancelling I/O %d", req->tag); |
| |
| /* don't abort one completed request */ |
| if (blk_mq_request_completed(req)) |
| return true; |
| |
| nvme_req(req)->status = NVME_SC_HOST_ABORTED_CMD; |
| blk_mq_complete_request(req); |
| return true; |
| } |
| EXPORT_SYMBOL_GPL(nvme_cancel_request); |
| |
| bool nvme_change_ctrl_state(struct nvme_ctrl *ctrl, |
| enum nvme_ctrl_state new_state) |
| { |
| enum nvme_ctrl_state old_state; |
| unsigned long flags; |
| bool changed = false; |
| |
| spin_lock_irqsave(&ctrl->lock, flags); |
| |
| old_state = ctrl->state; |
| switch (new_state) { |
| case NVME_CTRL_LIVE: |
| switch (old_state) { |
| case NVME_CTRL_NEW: |
| case NVME_CTRL_RESETTING: |
| case NVME_CTRL_CONNECTING: |
| changed = true; |
| fallthrough; |
| default: |
| break; |
| } |
| break; |
| case NVME_CTRL_RESETTING: |
| switch (old_state) { |
| case NVME_CTRL_NEW: |
| case NVME_CTRL_LIVE: |
| changed = true; |
| fallthrough; |
| default: |
| break; |
| } |
| break; |
| case NVME_CTRL_CONNECTING: |
| switch (old_state) { |
| case NVME_CTRL_NEW: |
| case NVME_CTRL_RESETTING: |
| changed = true; |
| fallthrough; |
| default: |
| break; |
| } |
| break; |
| case NVME_CTRL_DELETING: |
| switch (old_state) { |
| case NVME_CTRL_LIVE: |
| case NVME_CTRL_RESETTING: |
| case NVME_CTRL_CONNECTING: |
| changed = true; |
| fallthrough; |
| default: |
| break; |
| } |
| break; |
| case NVME_CTRL_DELETING_NOIO: |
| switch (old_state) { |
| case NVME_CTRL_DELETING: |
| case NVME_CTRL_DEAD: |
| changed = true; |
| fallthrough; |
| default: |
| break; |
| } |
| break; |
| case NVME_CTRL_DEAD: |
| switch (old_state) { |
| case NVME_CTRL_DELETING: |
| changed = true; |
| fallthrough; |
| default: |
| break; |
| } |
| break; |
| default: |
| break; |
| } |
| |
| if (changed) { |
| ctrl->state = new_state; |
| wake_up_all(&ctrl->state_wq); |
| } |
| |
| spin_unlock_irqrestore(&ctrl->lock, flags); |
| if (!changed) |
| return false; |
| |
| if (ctrl->state == NVME_CTRL_LIVE) { |
| if (old_state == NVME_CTRL_CONNECTING) |
| nvme_stop_failfast_work(ctrl); |
| nvme_kick_requeue_lists(ctrl); |
| } else if (ctrl->state == NVME_CTRL_CONNECTING && |
| old_state == NVME_CTRL_RESETTING) { |
| nvme_start_failfast_work(ctrl); |
| } |
| return changed; |
| } |
| EXPORT_SYMBOL_GPL(nvme_change_ctrl_state); |
| |
| /* |
| * Returns true for sink states that can't ever transition back to live. |
| */ |
| static bool nvme_state_terminal(struct nvme_ctrl *ctrl) |
| { |
| switch (ctrl->state) { |
| case NVME_CTRL_NEW: |
| case NVME_CTRL_LIVE: |
| case NVME_CTRL_RESETTING: |
| case NVME_CTRL_CONNECTING: |
| return false; |
| case NVME_CTRL_DELETING: |
| case NVME_CTRL_DELETING_NOIO: |
| case NVME_CTRL_DEAD: |
| return true; |
| default: |
| WARN_ONCE(1, "Unhandled ctrl state:%d", ctrl->state); |
| return true; |
| } |
| } |
| |
| /* |
| * Waits for the controller state to be resetting, or returns false if it is |
| * not possible to ever transition to that state. |
| */ |
| bool nvme_wait_reset(struct nvme_ctrl *ctrl) |
| { |
| wait_event(ctrl->state_wq, |
| nvme_change_ctrl_state(ctrl, NVME_CTRL_RESETTING) || |
| nvme_state_terminal(ctrl)); |
| return ctrl->state == NVME_CTRL_RESETTING; |
| } |
| EXPORT_SYMBOL_GPL(nvme_wait_reset); |
| |
| static void nvme_free_ns_head(struct kref *ref) |
| { |
| struct nvme_ns_head *head = |
| container_of(ref, struct nvme_ns_head, ref); |
| |
| nvme_mpath_remove_disk(head); |
| ida_simple_remove(&head->subsys->ns_ida, head->instance); |
| cleanup_srcu_struct(&head->srcu); |
| nvme_put_subsystem(head->subsys); |
| kfree(head); |
| } |
| |
| static void nvme_put_ns_head(struct nvme_ns_head *head) |
| { |
| kref_put(&head->ref, nvme_free_ns_head); |
| } |
| |
| static void nvme_free_ns(struct kref *kref) |
| { |
| struct nvme_ns *ns = container_of(kref, struct nvme_ns, kref); |
| |
| if (ns->ndev) |
| nvme_nvm_unregister(ns); |
| |
| put_disk(ns->disk); |
| nvme_put_ns_head(ns->head); |
| nvme_put_ctrl(ns->ctrl); |
| kfree(ns); |
| } |
| |
| void nvme_put_ns(struct nvme_ns *ns) |
| { |
| kref_put(&ns->kref, nvme_free_ns); |
| } |
| EXPORT_SYMBOL_NS_GPL(nvme_put_ns, NVME_TARGET_PASSTHRU); |
| |
| static inline void nvme_clear_nvme_request(struct request *req) |
| { |
| if (!(req->rq_flags & RQF_DONTPREP)) { |
| nvme_req(req)->retries = 0; |
| nvme_req(req)->flags = 0; |
| req->rq_flags |= RQF_DONTPREP; |
| } |
| } |
| |
| static inline unsigned int nvme_req_op(struct nvme_command *cmd) |
| { |
| return nvme_is_write(cmd) ? REQ_OP_DRV_OUT : REQ_OP_DRV_IN; |
| } |
| |
| static inline void nvme_init_request(struct request *req, |
| struct nvme_command *cmd) |
| { |
| if (req->q->queuedata) |
| req->timeout = NVME_IO_TIMEOUT; |
| else /* no queuedata implies admin queue */ |
| req->timeout = NVME_ADMIN_TIMEOUT; |
| |
| req->cmd_flags |= REQ_FAILFAST_DRIVER; |
| nvme_clear_nvme_request(req); |
| nvme_req(req)->cmd = cmd; |
| } |
| |
| struct request *nvme_alloc_request(struct request_queue *q, |
| struct nvme_command *cmd, blk_mq_req_flags_t flags) |
| { |
| struct request *req; |
| |
| req = blk_mq_alloc_request(q, nvme_req_op(cmd), flags); |
| if (!IS_ERR(req)) |
| nvme_init_request(req, cmd); |
| return req; |
| } |
| EXPORT_SYMBOL_GPL(nvme_alloc_request); |
| |
| static struct request *nvme_alloc_request_qid(struct request_queue *q, |
| struct nvme_command *cmd, blk_mq_req_flags_t flags, int qid) |
| { |
| struct request *req; |
| |
| req = blk_mq_alloc_request_hctx(q, nvme_req_op(cmd), flags, |
| qid ? qid - 1 : 0); |
| if (!IS_ERR(req)) |
| nvme_init_request(req, cmd); |
| return req; |
| } |
| |
| static int nvme_toggle_streams(struct nvme_ctrl *ctrl, bool enable) |
| { |
| struct nvme_command c; |
| |
| memset(&c, 0, sizeof(c)); |
| |
| c.directive.opcode = nvme_admin_directive_send; |
| c.directive.nsid = cpu_to_le32(NVME_NSID_ALL); |
| c.directive.doper = NVME_DIR_SND_ID_OP_ENABLE; |
| c.directive.dtype = NVME_DIR_IDENTIFY; |
| c.directive.tdtype = NVME_DIR_STREAMS; |
| c.directive.endir = enable ? NVME_DIR_ENDIR : 0; |
| |
| return nvme_submit_sync_cmd(ctrl->admin_q, &c, NULL, 0); |
| } |
| |
| static int nvme_disable_streams(struct nvme_ctrl *ctrl) |
| { |
| return nvme_toggle_streams(ctrl, false); |
| } |
| |
| static int nvme_enable_streams(struct nvme_ctrl *ctrl) |
| { |
| return nvme_toggle_streams(ctrl, true); |
| } |
| |
| static int nvme_get_stream_params(struct nvme_ctrl *ctrl, |
| struct streams_directive_params *s, u32 nsid) |
| { |
| struct nvme_command c; |
| |
| memset(&c, 0, sizeof(c)); |
| memset(s, 0, sizeof(*s)); |
| |
| c.directive.opcode = nvme_admin_directive_recv; |
| c.directive.nsid = cpu_to_le32(nsid); |
| c.directive.numd = cpu_to_le32(nvme_bytes_to_numd(sizeof(*s))); |
| c.directive.doper = NVME_DIR_RCV_ST_OP_PARAM; |
| c.directive.dtype = NVME_DIR_STREAMS; |
| |
| return nvme_submit_sync_cmd(ctrl->admin_q, &c, s, sizeof(*s)); |
| } |
| |
| static int nvme_configure_directives(struct nvme_ctrl *ctrl) |
| { |
| struct streams_directive_params s; |
| int ret; |
| |
| if (!(ctrl->oacs & NVME_CTRL_OACS_DIRECTIVES)) |
| return 0; |
| if (!streams) |
| return 0; |
| |
| ret = nvme_enable_streams(ctrl); |
| if (ret) |
| return ret; |
| |
| ret = nvme_get_stream_params(ctrl, &s, NVME_NSID_ALL); |
| if (ret) |
| goto out_disable_stream; |
| |
| ctrl->nssa = le16_to_cpu(s.nssa); |
| if (ctrl->nssa < BLK_MAX_WRITE_HINTS - 1) { |
| dev_info(ctrl->device, "too few streams (%u) available\n", |
| ctrl->nssa); |
| goto out_disable_stream; |
| } |
| |
| ctrl->nr_streams = min_t(u16, ctrl->nssa, BLK_MAX_WRITE_HINTS - 1); |
| dev_info(ctrl->device, "Using %u streams\n", ctrl->nr_streams); |
| return 0; |
| |
| out_disable_stream: |
| nvme_disable_streams(ctrl); |
| return ret; |
| } |
| |
| /* |
| * Check if 'req' has a write hint associated with it. If it does, assign |
| * a valid namespace stream to the write. |
| */ |
| static void nvme_assign_write_stream(struct nvme_ctrl *ctrl, |
| struct request *req, u16 *control, |
| u32 *dsmgmt) |
| { |
| enum rw_hint streamid = req->write_hint; |
| |
| if (streamid == WRITE_LIFE_NOT_SET || streamid == WRITE_LIFE_NONE) |
| streamid = 0; |
| else { |
| streamid--; |
| if (WARN_ON_ONCE(streamid > ctrl->nr_streams)) |
| return; |
| |
| *control |= NVME_RW_DTYPE_STREAMS; |
| *dsmgmt |= streamid << 16; |
| } |
| |
| if (streamid < ARRAY_SIZE(req->q->write_hints)) |
| req->q->write_hints[streamid] += blk_rq_bytes(req) >> 9; |
| } |
| |
| static void nvme_setup_passthrough(struct request *req, |
| struct nvme_command *cmd) |
| { |
| memcpy(cmd, nvme_req(req)->cmd, sizeof(*cmd)); |
| /* passthru commands should let the driver set the SGL flags */ |
| cmd->common.flags &= ~NVME_CMD_SGL_ALL; |
| } |
| |
| static inline void nvme_setup_flush(struct nvme_ns *ns, |
| struct nvme_command *cmnd) |
| { |
| cmnd->common.opcode = nvme_cmd_flush; |
| cmnd->common.nsid = cpu_to_le32(ns->head->ns_id); |
| } |
| |
| static blk_status_t nvme_setup_discard(struct nvme_ns *ns, struct request *req, |
| struct nvme_command *cmnd) |
| { |
| unsigned short segments = blk_rq_nr_discard_segments(req), n = 0; |
| struct nvme_dsm_range *range; |
| struct bio *bio; |
| |
| /* |
| * Some devices do not consider the DSM 'Number of Ranges' field when |
| * determining how much data to DMA. Always allocate memory for maximum |
| * number of segments to prevent device reading beyond end of buffer. |
| */ |
| static const size_t alloc_size = sizeof(*range) * NVME_DSM_MAX_RANGES; |
| |
| range = kzalloc(alloc_size, GFP_ATOMIC | __GFP_NOWARN); |
| if (!range) { |
| /* |
| * If we fail allocation our range, fallback to the controller |
| * discard page. If that's also busy, it's safe to return |
| * busy, as we know we can make progress once that's freed. |
| */ |
| if (test_and_set_bit_lock(0, &ns->ctrl->discard_page_busy)) |
| return BLK_STS_RESOURCE; |
| |
| range = page_address(ns->ctrl->discard_page); |
| } |
| |
| __rq_for_each_bio(bio, req) { |
| u64 slba = nvme_sect_to_lba(ns, bio->bi_iter.bi_sector); |
| u32 nlb = bio->bi_iter.bi_size >> ns->lba_shift; |
| |
| if (n < segments) { |
| range[n].cattr = cpu_to_le32(0); |
| range[n].nlb = cpu_to_le32(nlb); |
| range[n].slba = cpu_to_le64(slba); |
| } |
| n++; |
| } |
| |
| if (WARN_ON_ONCE(n != segments)) { |
| if (virt_to_page(range) == ns->ctrl->discard_page) |
| clear_bit_unlock(0, &ns->ctrl->discard_page_busy); |
| else |
| kfree(range); |
| return BLK_STS_IOERR; |
| } |
| |
| cmnd->dsm.opcode = nvme_cmd_dsm; |
| cmnd->dsm.nsid = cpu_to_le32(ns->head->ns_id); |
| cmnd->dsm.nr = cpu_to_le32(segments - 1); |
| cmnd->dsm.attributes = cpu_to_le32(NVME_DSMGMT_AD); |
| |
| req->special_vec.bv_page = virt_to_page(range); |
| req->special_vec.bv_offset = offset_in_page(range); |
| req->special_vec.bv_len = alloc_size; |
| req->rq_flags |= RQF_SPECIAL_PAYLOAD; |
| |
| return BLK_STS_OK; |
| } |
| |
| static inline blk_status_t nvme_setup_write_zeroes(struct nvme_ns *ns, |
| struct request *req, struct nvme_command *cmnd) |
| { |
| if (ns->ctrl->quirks & NVME_QUIRK_DEALLOCATE_ZEROES) |
| return nvme_setup_discard(ns, req, cmnd); |
| |
| cmnd->write_zeroes.opcode = nvme_cmd_write_zeroes; |
| cmnd->write_zeroes.nsid = cpu_to_le32(ns->head->ns_id); |
| cmnd->write_zeroes.slba = |
| cpu_to_le64(nvme_sect_to_lba(ns, blk_rq_pos(req))); |
| cmnd->write_zeroes.length = |
| cpu_to_le16((blk_rq_bytes(req) >> ns->lba_shift) - 1); |
| cmnd->write_zeroes.control = 0; |
| return BLK_STS_OK; |
| } |
| |
| static inline blk_status_t nvme_setup_rw(struct nvme_ns *ns, |
| struct request *req, struct nvme_command *cmnd, |
| enum nvme_opcode op) |
| { |
| struct nvme_ctrl *ctrl = ns->ctrl; |
| u16 control = 0; |
| u32 dsmgmt = 0; |
| |
| if (req->cmd_flags & REQ_FUA) |
| control |= NVME_RW_FUA; |
| if (req->cmd_flags & (REQ_FAILFAST_DEV | REQ_RAHEAD)) |
| control |= NVME_RW_LR; |
| |
| if (req->cmd_flags & REQ_RAHEAD) |
| dsmgmt |= NVME_RW_DSM_FREQ_PREFETCH; |
| |
| cmnd->rw.opcode = op; |
| cmnd->rw.nsid = cpu_to_le32(ns->head->ns_id); |
| cmnd->rw.slba = cpu_to_le64(nvme_sect_to_lba(ns, blk_rq_pos(req))); |
| cmnd->rw.length = cpu_to_le16((blk_rq_bytes(req) >> ns->lba_shift) - 1); |
| |
| if (req_op(req) == REQ_OP_WRITE && ctrl->nr_streams) |
| nvme_assign_write_stream(ctrl, req, &control, &dsmgmt); |
| |
| if (ns->ms) { |
| /* |
| * If formated with metadata, the block layer always provides a |
| * metadata buffer if CONFIG_BLK_DEV_INTEGRITY is enabled. Else |
| * we enable the PRACT bit for protection information or set the |
| * namespace capacity to zero to prevent any I/O. |
| */ |
| if (!blk_integrity_rq(req)) { |
| if (WARN_ON_ONCE(!nvme_ns_has_pi(ns))) |
| return BLK_STS_NOTSUPP; |
| control |= NVME_RW_PRINFO_PRACT; |
| } |
| |
| switch (ns->pi_type) { |
| case NVME_NS_DPS_PI_TYPE3: |
| control |= NVME_RW_PRINFO_PRCHK_GUARD; |
| break; |
| case NVME_NS_DPS_PI_TYPE1: |
| case NVME_NS_DPS_PI_TYPE2: |
| control |= NVME_RW_PRINFO_PRCHK_GUARD | |
| NVME_RW_PRINFO_PRCHK_REF; |
| if (op == nvme_cmd_zone_append) |
| control |= NVME_RW_APPEND_PIREMAP; |
| cmnd->rw.reftag = cpu_to_le32(t10_pi_ref_tag(req)); |
| break; |
| } |
| } |
| |
| cmnd->rw.control = cpu_to_le16(control); |
| cmnd->rw.dsmgmt = cpu_to_le32(dsmgmt); |
| return 0; |
| } |
| |
| void nvme_cleanup_cmd(struct request *req) |
| { |
| if (req->rq_flags & RQF_SPECIAL_PAYLOAD) { |
| struct nvme_ns *ns = req->rq_disk->private_data; |
| struct page *page = req->special_vec.bv_page; |
| |
| if (page == ns->ctrl->discard_page) |
| clear_bit_unlock(0, &ns->ctrl->discard_page_busy); |
| else |
| kfree(page_address(page) + req->special_vec.bv_offset); |
| } |
| } |
| EXPORT_SYMBOL_GPL(nvme_cleanup_cmd); |
| |
| blk_status_t nvme_setup_cmd(struct nvme_ns *ns, struct request *req, |
| struct nvme_command *cmd) |
| { |
| blk_status_t ret = BLK_STS_OK; |
| |
| nvme_clear_nvme_request(req); |
| |
| memset(cmd, 0, sizeof(*cmd)); |
| switch (req_op(req)) { |
| case REQ_OP_DRV_IN: |
| case REQ_OP_DRV_OUT: |
| nvme_setup_passthrough(req, cmd); |
| break; |
| case REQ_OP_FLUSH: |
| nvme_setup_flush(ns, cmd); |
| break; |
| case REQ_OP_ZONE_RESET_ALL: |
| case REQ_OP_ZONE_RESET: |
| ret = nvme_setup_zone_mgmt_send(ns, req, cmd, NVME_ZONE_RESET); |
| break; |
| case REQ_OP_ZONE_OPEN: |
| ret = nvme_setup_zone_mgmt_send(ns, req, cmd, NVME_ZONE_OPEN); |
| break; |
| case REQ_OP_ZONE_CLOSE: |
| ret = nvme_setup_zone_mgmt_send(ns, req, cmd, NVME_ZONE_CLOSE); |
| break; |
| case REQ_OP_ZONE_FINISH: |
| ret = nvme_setup_zone_mgmt_send(ns, req, cmd, NVME_ZONE_FINISH); |
| break; |
| case REQ_OP_WRITE_ZEROES: |
| ret = nvme_setup_write_zeroes(ns, req, cmd); |
| break; |
| case REQ_OP_DISCARD: |
| ret = nvme_setup_discard(ns, req, cmd); |
| break; |
| case REQ_OP_READ: |
| ret = nvme_setup_rw(ns, req, cmd, nvme_cmd_read); |
| break; |
| case REQ_OP_WRITE: |
| ret = nvme_setup_rw(ns, req, cmd, nvme_cmd_write); |
| break; |
| case REQ_OP_ZONE_APPEND: |
| ret = nvme_setup_rw(ns, req, cmd, nvme_cmd_zone_append); |
| break; |
| default: |
| WARN_ON_ONCE(1); |
| return BLK_STS_IOERR; |
| } |
| |
| cmd->common.command_id = req->tag; |
| trace_nvme_setup_cmd(req, cmd); |
| return ret; |
| } |
| EXPORT_SYMBOL_GPL(nvme_setup_cmd); |
| |
| static void nvme_end_sync_rq(struct request *rq, blk_status_t error) |
| { |
| struct completion *waiting = rq->end_io_data; |
| |
| rq->end_io_data = NULL; |
| complete(waiting); |
| } |
| |
| static void nvme_execute_rq_polled(struct request_queue *q, |
| struct gendisk *bd_disk, struct request *rq, int at_head) |
| { |
| DECLARE_COMPLETION_ONSTACK(wait); |
| |
| WARN_ON_ONCE(!test_bit(QUEUE_FLAG_POLL, &q->queue_flags)); |
| |
| rq->cmd_flags |= REQ_HIPRI; |
| rq->end_io_data = &wait; |
| blk_execute_rq_nowait(q, bd_disk, rq, at_head, nvme_end_sync_rq); |
| |
| while (!completion_done(&wait)) { |
| blk_poll(q, request_to_qc_t(rq->mq_hctx, rq), true); |
| cond_resched(); |
| } |
| } |
| |
| /* |
| * Returns 0 on success. If the result is negative, it's a Linux error code; |
| * if the result is positive, it's an NVM Express status code |
| */ |
| int __nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd, |
| union nvme_result *result, void *buffer, unsigned bufflen, |
| unsigned timeout, int qid, int at_head, |
| blk_mq_req_flags_t flags, bool poll) |
| { |
| struct request *req; |
| int ret; |
| |
| if (qid == NVME_QID_ANY) |
| req = nvme_alloc_request(q, cmd, flags); |
| else |
| req = nvme_alloc_request_qid(q, cmd, flags, qid); |
| if (IS_ERR(req)) |
| return PTR_ERR(req); |
| |
| if (timeout) |
| req->timeout = timeout; |
| |
| if (buffer && bufflen) { |
| ret = blk_rq_map_kern(q, req, buffer, bufflen, GFP_KERNEL); |
| if (ret) |
| goto out; |
| } |
| |
| if (poll) |
| nvme_execute_rq_polled(req->q, NULL, req, at_head); |
| else |
| blk_execute_rq(req->q, NULL, req, at_head); |
| if (result) |
| *result = nvme_req(req)->result; |
| if (nvme_req(req)->flags & NVME_REQ_CANCELLED) |
| ret = -EINTR; |
| else |
| ret = nvme_req(req)->status; |
| out: |
| blk_mq_free_request(req); |
| return ret; |
| } |
| EXPORT_SYMBOL_GPL(__nvme_submit_sync_cmd); |
| |
| int nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd, |
| void *buffer, unsigned bufflen) |
| { |
| return __nvme_submit_sync_cmd(q, cmd, NULL, buffer, bufflen, 0, |
| NVME_QID_ANY, 0, 0, false); |
| } |
| EXPORT_SYMBOL_GPL(nvme_submit_sync_cmd); |
| |
| static void *nvme_add_user_metadata(struct bio *bio, void __user *ubuf, |
| unsigned len, u32 seed, bool write) |
| { |
| struct bio_integrity_payload *bip; |
| int ret = -ENOMEM; |
| void *buf; |
| |
| buf = kmalloc(len, GFP_KERNEL); |
| if (!buf) |
| goto out; |
| |
| ret = -EFAULT; |
| if (write && copy_from_user(buf, ubuf, len)) |
| goto out_free_meta; |
| |
| bip = bio_integrity_alloc(bio, GFP_KERNEL, 1); |
| if (IS_ERR(bip)) { |
| ret = PTR_ERR(bip); |
| goto out_free_meta; |
| } |
| |
| bip->bip_iter.bi_size = len; |
| bip->bip_iter.bi_sector = seed; |
| ret = bio_integrity_add_page(bio, virt_to_page(buf), len, |
| offset_in_page(buf)); |
| if (ret == len) |
| return buf; |
| ret = -ENOMEM; |
| out_free_meta: |
| kfree(buf); |
| out: |
| return ERR_PTR(ret); |
| } |
| |
| static u32 nvme_known_admin_effects(u8 opcode) |
| { |
| switch (opcode) { |
| case nvme_admin_format_nvm: |
| return NVME_CMD_EFFECTS_LBCC | NVME_CMD_EFFECTS_NCC | |
| NVME_CMD_EFFECTS_CSE_MASK; |
| case nvme_admin_sanitize_nvm: |
| return NVME_CMD_EFFECTS_LBCC | NVME_CMD_EFFECTS_CSE_MASK; |
| default: |
| break; |
| } |
| return 0; |
| } |
| |
| u32 nvme_command_effects(struct nvme_ctrl *ctrl, struct nvme_ns *ns, u8 opcode) |
| { |
| u32 effects = 0; |
| |
| if (ns) { |
| if (ns->head->effects) |
| effects = le32_to_cpu(ns->head->effects->iocs[opcode]); |
| if (effects & ~(NVME_CMD_EFFECTS_CSUPP | NVME_CMD_EFFECTS_LBCC)) |
| dev_warn(ctrl->device, |
| "IO command:%02x has unhandled effects:%08x\n", |
| opcode, effects); |
| return 0; |
| } |
| |
| if (ctrl->effects) |
| effects = le32_to_cpu(ctrl->effects->acs[opcode]); |
| effects |= nvme_known_admin_effects(opcode); |
| |
| return effects; |
| } |
| EXPORT_SYMBOL_NS_GPL(nvme_command_effects, NVME_TARGET_PASSTHRU); |
| |
| static u32 nvme_passthru_start(struct nvme_ctrl *ctrl, struct nvme_ns *ns, |
| u8 opcode) |
| { |
| u32 effects = nvme_command_effects(ctrl, ns, opcode); |
| |
| /* |
| * For simplicity, IO to all namespaces is quiesced even if the command |
| * effects say only one namespace is affected. |
| */ |
| if (effects & NVME_CMD_EFFECTS_CSE_MASK) { |
| mutex_lock(&ctrl->scan_lock); |
| mutex_lock(&ctrl->subsys->lock); |
| nvme_mpath_start_freeze(ctrl->subsys); |
| nvme_mpath_wait_freeze(ctrl->subsys); |
| nvme_start_freeze(ctrl); |
| nvme_wait_freeze(ctrl); |
| } |
| return effects; |
| } |
| |
| static void nvme_passthru_end(struct nvme_ctrl *ctrl, u32 effects) |
| { |
| if (effects & NVME_CMD_EFFECTS_CSE_MASK) { |
| nvme_unfreeze(ctrl); |
| nvme_mpath_unfreeze(ctrl->subsys); |
| mutex_unlock(&ctrl->subsys->lock); |
| nvme_remove_invalid_namespaces(ctrl, NVME_NSID_ALL); |
| mutex_unlock(&ctrl->scan_lock); |
| } |
| if (effects & NVME_CMD_EFFECTS_CCC) |
| nvme_init_identify(ctrl); |
| if (effects & (NVME_CMD_EFFECTS_NIC | NVME_CMD_EFFECTS_NCC)) { |
| nvme_queue_scan(ctrl); |
| flush_work(&ctrl->scan_work); |
| } |
| } |
| |
| void nvme_execute_passthru_rq(struct request *rq) |
| { |
| struct nvme_command *cmd = nvme_req(rq)->cmd; |
| struct nvme_ctrl *ctrl = nvme_req(rq)->ctrl; |
| struct nvme_ns *ns = rq->q->queuedata; |
| struct gendisk *disk = ns ? ns->disk : NULL; |
| u32 effects; |
| |
| effects = nvme_passthru_start(ctrl, ns, cmd->common.opcode); |
| blk_execute_rq(rq->q, disk, rq, 0); |
| nvme_passthru_end(ctrl, effects); |
| } |
| EXPORT_SYMBOL_NS_GPL(nvme_execute_passthru_rq, NVME_TARGET_PASSTHRU); |
| |
| static int nvme_submit_user_cmd(struct request_queue *q, |
| struct nvme_command *cmd, void __user *ubuffer, |
| unsigned bufflen, void __user *meta_buffer, unsigned meta_len, |
| u32 meta_seed, u64 *result, unsigned timeout) |
| { |
| bool write = nvme_is_write(cmd); |
| struct nvme_ns *ns = q->queuedata; |
| struct gendisk *disk = ns ? ns->disk : NULL; |
| struct request *req; |
| struct bio *bio = NULL; |
| void *meta = NULL; |
| int ret; |
| |
| req = nvme_alloc_request(q, cmd, 0); |
| if (IS_ERR(req)) |
| return PTR_ERR(req); |
| |
| if (timeout) |
| req->timeout = timeout; |
| nvme_req(req)->flags |= NVME_REQ_USERCMD; |
| |
| if (ubuffer && bufflen) { |
| ret = blk_rq_map_user(q, req, NULL, ubuffer, bufflen, |
| GFP_KERNEL); |
| if (ret) |
| goto out; |
| bio = req->bio; |
| bio->bi_disk = disk; |
| if (disk && meta_buffer && meta_len) { |
| meta = nvme_add_user_metadata(bio, meta_buffer, meta_len, |
| meta_seed, write); |
| if (IS_ERR(meta)) { |
| ret = PTR_ERR(meta); |
| goto out_unmap; |
| } |
| req->cmd_flags |= REQ_INTEGRITY; |
| } |
| } |
| |
| nvme_execute_passthru_rq(req); |
| if (nvme_req(req)->flags & NVME_REQ_CANCELLED) |
| ret = -EINTR; |
| else |
| ret = nvme_req(req)->status; |
| if (result) |
| *result = le64_to_cpu(nvme_req(req)->result.u64); |
| if (meta && !ret && !write) { |
| if (copy_to_user(meta_buffer, meta, meta_len)) |
| ret = -EFAULT; |
| } |
| kfree(meta); |
| out_unmap: |
| if (bio) |
| blk_rq_unmap_user(bio); |
| out: |
| blk_mq_free_request(req); |
| return ret; |
| } |
| |
| static void nvme_keep_alive_end_io(struct request *rq, blk_status_t status) |
| { |
| struct nvme_ctrl *ctrl = rq->end_io_data; |
| unsigned long flags; |
| bool startka = false; |
| |
| blk_mq_free_request(rq); |
| |
| if (status) { |
| dev_err(ctrl->device, |
| "failed nvme_keep_alive_end_io error=%d\n", |
| status); |
| return; |
| } |
| |
| ctrl->comp_seen = false; |
| spin_lock_irqsave(&ctrl->lock, flags); |
| if (ctrl->state == NVME_CTRL_LIVE || |
| ctrl->state == NVME_CTRL_CONNECTING) |
| startka = true; |
| spin_unlock_irqrestore(&ctrl->lock, flags); |
| if (startka) |
| queue_delayed_work(nvme_wq, &ctrl->ka_work, ctrl->kato * HZ); |
| } |
| |
| static int nvme_keep_alive(struct nvme_ctrl *ctrl) |
| { |
| struct request *rq; |
| |
| rq = nvme_alloc_request(ctrl->admin_q, &ctrl->ka_cmd, |
| BLK_MQ_REQ_RESERVED); |
| if (IS_ERR(rq)) |
| return PTR_ERR(rq); |
| |
| rq->timeout = ctrl->kato * HZ; |
| rq->end_io_data = ctrl; |
| |
| blk_execute_rq_nowait(rq->q, NULL, rq, 0, nvme_keep_alive_end_io); |
| |
| return 0; |
| } |
| |
| static void nvme_keep_alive_work(struct work_struct *work) |
| { |
| struct nvme_ctrl *ctrl = container_of(to_delayed_work(work), |
| struct nvme_ctrl, ka_work); |
| bool comp_seen = ctrl->comp_seen; |
| |
| if ((ctrl->ctratt & NVME_CTRL_ATTR_TBKAS) && comp_seen) { |
| dev_dbg(ctrl->device, |
| "reschedule traffic based keep-alive timer\n"); |
| ctrl->comp_seen = false; |
| queue_delayed_work(nvme_wq, &ctrl->ka_work, ctrl->kato * HZ); |
| return; |
| } |
| |
| if (nvme_keep_alive(ctrl)) { |
| /* allocation failure, reset the controller */ |
| dev_err(ctrl->device, "keep-alive failed\n"); |
| nvme_reset_ctrl(ctrl); |
| return; |
| } |
| } |
| |
| static void nvme_start_keep_alive(struct nvme_ctrl *ctrl) |
| { |
| if (unlikely(ctrl->kato == 0)) |
| return; |
| |
| queue_delayed_work(nvme_wq, &ctrl->ka_work, ctrl->kato * HZ); |
| } |
| |
| void nvme_stop_keep_alive(struct nvme_ctrl *ctrl) |
| { |
| if (unlikely(ctrl->kato == 0)) |
| return; |
| |
| cancel_delayed_work_sync(&ctrl->ka_work); |
| } |
| EXPORT_SYMBOL_GPL(nvme_stop_keep_alive); |
| |
| /* |
| * In NVMe 1.0 the CNS field was just a binary controller or namespace |
| * flag, thus sending any new CNS opcodes has a big chance of not working. |
| * Qemu unfortunately had that bug after reporting a 1.1 version compliance |
| * (but not for any later version). |
| */ |
| static bool nvme_ctrl_limited_cns(struct nvme_ctrl *ctrl) |
| { |
| if (ctrl->quirks & NVME_QUIRK_IDENTIFY_CNS) |
| return ctrl->vs < NVME_VS(1, 2, 0); |
| return ctrl->vs < NVME_VS(1, 1, 0); |
| } |
| |
| static int nvme_identify_ctrl(struct nvme_ctrl *dev, struct nvme_id_ctrl **id) |
| { |
| struct nvme_command c = { }; |
| int error; |
| |
| /* gcc-4.4.4 (at least) has issues with initializers and anon unions */ |
| c.identify.opcode = nvme_admin_identify; |
| c.identify.cns = NVME_ID_CNS_CTRL; |
| |
| *id = kmalloc(sizeof(struct nvme_id_ctrl), GFP_KERNEL); |
| if (!*id) |
| return -ENOMEM; |
| |
| error = nvme_submit_sync_cmd(dev->admin_q, &c, *id, |
| sizeof(struct nvme_id_ctrl)); |
| if (error) |
| kfree(*id); |
| return error; |
| } |
| |
| static bool nvme_multi_css(struct nvme_ctrl *ctrl) |
| { |
| return (ctrl->ctrl_config & NVME_CC_CSS_MASK) == NVME_CC_CSS_CSI; |
| } |
| |
| static int nvme_process_ns_desc(struct nvme_ctrl *ctrl, struct nvme_ns_ids *ids, |
| struct nvme_ns_id_desc *cur, bool *csi_seen) |
| { |
| const char *warn_str = "ctrl returned bogus length:"; |
| void *data = cur; |
| |
| switch (cur->nidt) { |
| case NVME_NIDT_EUI64: |
| if (cur->nidl != NVME_NIDT_EUI64_LEN) { |
| dev_warn(ctrl->device, "%s %d for NVME_NIDT_EUI64\n", |
| warn_str, cur->nidl); |
| return -1; |
| } |
| memcpy(ids->eui64, data + sizeof(*cur), NVME_NIDT_EUI64_LEN); |
| return NVME_NIDT_EUI64_LEN; |
| case NVME_NIDT_NGUID: |
| if (cur->nidl != NVME_NIDT_NGUID_LEN) { |
| dev_warn(ctrl->device, "%s %d for NVME_NIDT_NGUID\n", |
| warn_str, cur->nidl); |
| return -1; |
| } |
| memcpy(ids->nguid, data + sizeof(*cur), NVME_NIDT_NGUID_LEN); |
| return NVME_NIDT_NGUID_LEN; |
| case NVME_NIDT_UUID: |
| if (cur->nidl != NVME_NIDT_UUID_LEN) { |
| dev_warn(ctrl->device, "%s %d for NVME_NIDT_UUID\n", |
| warn_str, cur->nidl); |
| return -1; |
| } |
| uuid_copy(&ids->uuid, data + sizeof(*cur)); |
| return NVME_NIDT_UUID_LEN; |
| case NVME_NIDT_CSI: |
| if (cur->nidl != NVME_NIDT_CSI_LEN) { |
| dev_warn(ctrl->device, "%s %d for NVME_NIDT_CSI\n", |
| warn_str, cur->nidl); |
| return -1; |
| } |
| memcpy(&ids->csi, data + sizeof(*cur), NVME_NIDT_CSI_LEN); |
| *csi_seen = true; |
| return NVME_NIDT_CSI_LEN; |
| default: |
| /* Skip unknown types */ |
| return cur->nidl; |
| } |
| } |
| |
| static int nvme_identify_ns_descs(struct nvme_ctrl *ctrl, unsigned nsid, |
| struct nvme_ns_ids *ids) |
| { |
| struct nvme_command c = { }; |
| bool csi_seen = false; |
| int status, pos, len; |
| void *data; |
| |
| if (ctrl->vs < NVME_VS(1, 3, 0) && !nvme_multi_css(ctrl)) |
| return 0; |
| if (ctrl->quirks & NVME_QUIRK_NO_NS_DESC_LIST) |
| return 0; |
| |
| c.identify.opcode = nvme_admin_identify; |
| c.identify.nsid = cpu_to_le32(nsid); |
| c.identify.cns = NVME_ID_CNS_NS_DESC_LIST; |
| |
| data = kzalloc(NVME_IDENTIFY_DATA_SIZE, GFP_KERNEL); |
| if (!data) |
| return -ENOMEM; |
| |
| status = nvme_submit_sync_cmd(ctrl->admin_q, &c, data, |
| NVME_IDENTIFY_DATA_SIZE); |
| if (status) { |
| dev_warn(ctrl->device, |
| "Identify Descriptors failed (nsid=%u, status=0x%x)\n", |
| nsid, status); |
| goto free_data; |
| } |
| |
| for (pos = 0; pos < NVME_IDENTIFY_DATA_SIZE; pos += len) { |
| struct nvme_ns_id_desc *cur = data + pos; |
| |
| if (cur->nidl == 0) |
| break; |
| |
| len = nvme_process_ns_desc(ctrl, ids, cur, &csi_seen); |
| if (len < 0) |
| break; |
| |
| len += sizeof(*cur); |
| } |
| |
| if (nvme_multi_css(ctrl) && !csi_seen) { |
| dev_warn(ctrl->device, "Command set not reported for nsid:%d\n", |
| nsid); |
| status = -EINVAL; |
| } |
| |
| free_data: |
| kfree(data); |
| return status; |
| } |
| |
| static int nvme_identify_ns(struct nvme_ctrl *ctrl, unsigned nsid, |
| struct nvme_ns_ids *ids, struct nvme_id_ns **id) |
| { |
| struct nvme_command c = { }; |
| int error; |
| |
| /* gcc-4.4.4 (at least) has issues with initializers and anon unions */ |
| c.identify.opcode = nvme_admin_identify; |
| c.identify.nsid = cpu_to_le32(nsid); |
| c.identify.cns = NVME_ID_CNS_NS; |
| |
| *id = kmalloc(sizeof(**id), GFP_KERNEL); |
| if (!*id) |
| return -ENOMEM; |
| |
| error = nvme_submit_sync_cmd(ctrl->admin_q, &c, *id, sizeof(**id)); |
| if (error) { |
| dev_warn(ctrl->device, "Identify namespace failed (%d)\n", error); |
| goto out_free_id; |
| } |
| |
| error = -ENODEV; |
| if ((*id)->ncap == 0) /* namespace not allocated or attached */ |
| goto out_free_id; |
| |
| if (ctrl->vs >= NVME_VS(1, 1, 0) && |
| !memchr_inv(ids->eui64, 0, sizeof(ids->eui64))) |
| memcpy(ids->eui64, (*id)->eui64, sizeof(ids->eui64)); |
| if (ctrl->vs >= NVME_VS(1, 2, 0) && |
| !memchr_inv(ids->nguid, 0, sizeof(ids->nguid))) |
| memcpy(ids->nguid, (*id)->nguid, sizeof(ids->nguid)); |
| |
| return 0; |
| |
| out_free_id: |
| kfree(*id); |
| return error; |
| } |
| |
| static int nvme_features(struct nvme_ctrl *dev, u8 op, unsigned int fid, |
| unsigned int dword11, void *buffer, size_t buflen, u32 *result) |
| { |
| union nvme_result res = { 0 }; |
| struct nvme_command c; |
| int ret; |
| |
| memset(&c, 0, sizeof(c)); |
| c.features.opcode = op; |
| c.features.fid = cpu_to_le32(fid); |
| c.features.dword11 = cpu_to_le32(dword11); |
| |
| ret = __nvme_submit_sync_cmd(dev->admin_q, &c, &res, |
| buffer, buflen, 0, NVME_QID_ANY, 0, 0, false); |
| if (ret >= 0 && result) |
| *result = le32_to_cpu(res.u32); |
| return ret; |
| } |
| |
| int nvme_set_features(struct nvme_ctrl *dev, unsigned int fid, |
| unsigned int dword11, void *buffer, size_t buflen, |
| u32 *result) |
| { |
| return nvme_features(dev, nvme_admin_set_features, fid, dword11, buffer, |
| buflen, result); |
| } |
| EXPORT_SYMBOL_GPL(nvme_set_features); |
| |
| int nvme_get_features(struct nvme_ctrl *dev, unsigned int fid, |
| unsigned int dword11, void *buffer, size_t buflen, |
| u32 *result) |
| { |
| return nvme_features(dev, nvme_admin_get_features, fid, dword11, buffer, |
| buflen, result); |
| } |
| EXPORT_SYMBOL_GPL(nvme_get_features); |
| |
| int nvme_set_queue_count(struct nvme_ctrl *ctrl, int *count) |
| { |
| u32 q_count = (*count - 1) | ((*count - 1) << 16); |
| u32 result; |
| int status, nr_io_queues; |
| |
| status = nvme_set_features(ctrl, NVME_FEAT_NUM_QUEUES, q_count, NULL, 0, |
| &result); |
| if (status < 0) |
| return status; |
| |
| /* |
| * Degraded controllers might return an error when setting the queue |
| * count. We still want to be able to bring them online and offer |
| * access to the admin queue, as that might be only way to fix them up. |
| */ |
| if (status > 0) { |
| dev_err(ctrl->device, "Could not set queue count (%d)\n", status); |
| *count = 0; |
| } else { |
| nr_io_queues = min(result & 0xffff, result >> 16) + 1; |
| *count = min(*count, nr_io_queues); |
| } |
| |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(nvme_set_queue_count); |
| |
| #define NVME_AEN_SUPPORTED \ |
| (NVME_AEN_CFG_NS_ATTR | NVME_AEN_CFG_FW_ACT | \ |
| NVME_AEN_CFG_ANA_CHANGE | NVME_AEN_CFG_DISC_CHANGE) |
| |
| static void nvme_enable_aen(struct nvme_ctrl *ctrl) |
| { |
| u32 result, supported_aens = ctrl->oaes & NVME_AEN_SUPPORTED; |
| int status; |
| |
| if (!supported_aens) |
| return; |
| |
| status = nvme_set_features(ctrl, NVME_FEAT_ASYNC_EVENT, supported_aens, |
| NULL, 0, &result); |
| if (status) |
| dev_warn(ctrl->device, "Failed to configure AEN (cfg %x)\n", |
| supported_aens); |
| |
| queue_work(nvme_wq, &ctrl->async_event_work); |
| } |
| |
| /* |
| * Convert integer values from ioctl structures to user pointers, silently |
| * ignoring the upper bits in the compat case to match behaviour of 32-bit |
| * kernels. |
| */ |
| static void __user *nvme_to_user_ptr(uintptr_t ptrval) |
| { |
| if (in_compat_syscall()) |
| ptrval = (compat_uptr_t)ptrval; |
| return (void __user *)ptrval; |
| } |
| |
| static int nvme_submit_io(struct nvme_ns *ns, struct nvme_user_io __user *uio) |
| { |
| struct nvme_user_io io; |
| struct nvme_command c; |
| unsigned length, meta_len; |
| void __user *metadata; |
| |
| if (copy_from_user(&io, uio, sizeof(io))) |
| return -EFAULT; |
| if (io.flags) |
| return -EINVAL; |
| |
| switch (io.opcode) { |
| case nvme_cmd_write: |
| case nvme_cmd_read: |
| case nvme_cmd_compare: |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| length = (io.nblocks + 1) << ns->lba_shift; |
| meta_len = (io.nblocks + 1) * ns->ms; |
| metadata = nvme_to_user_ptr(io.metadata); |
| |
| if (ns->features & NVME_NS_EXT_LBAS) { |
| length += meta_len; |
| meta_len = 0; |
| } else if (meta_len) { |
| if ((io.metadata & 3) || !io.metadata) |
| return -EINVAL; |
| } |
| |
| memset(&c, 0, sizeof(c)); |
| c.rw.opcode = io.opcode; |
| c.rw.flags = io.flags; |
| c.rw.nsid = cpu_to_le32(ns->head->ns_id); |
| c.rw.slba = cpu_to_le64(io.slba); |
| c.rw.length = cpu_to_le16(io.nblocks); |
| c.rw.control = cpu_to_le16(io.control); |
| c.rw.dsmgmt = cpu_to_le32(io.dsmgmt); |
| c.rw.reftag = cpu_to_le32(io.reftag); |
| c.rw.apptag = cpu_to_le16(io.apptag); |
| c.rw.appmask = cpu_to_le16(io.appmask); |
| |
| return nvme_submit_user_cmd(ns->queue, &c, |
| nvme_to_user_ptr(io.addr), length, |
| metadata, meta_len, lower_32_bits(io.slba), NULL, 0); |
| } |
| |
| static int nvme_user_cmd(struct nvme_ctrl *ctrl, struct nvme_ns *ns, |
| struct nvme_passthru_cmd __user *ucmd) |
| { |
| struct nvme_passthru_cmd cmd; |
| struct nvme_command c; |
| unsigned timeout = 0; |
| u64 result; |
| int status; |
| |
| if (!capable(CAP_SYS_ADMIN)) |
| return -EACCES; |
| if (copy_from_user(&cmd, ucmd, sizeof(cmd))) |
| return -EFAULT; |
| if (cmd.flags) |
| return -EINVAL; |
| |
| memset(&c, 0, sizeof(c)); |
| c.common.opcode = cmd.opcode; |
| c.common.flags = cmd.flags; |
| c.common.nsid = cpu_to_le32(cmd.nsid); |
| c.common.cdw2[0] = cpu_to_le32(cmd.cdw2); |
| c.common.cdw2[1] = cpu_to_le32(cmd.cdw3); |
| c.common.cdw10 = cpu_to_le32(cmd.cdw10); |
| c.common.cdw11 = cpu_to_le32(cmd.cdw11); |
| c.common.cdw12 = cpu_to_le32(cmd.cdw12); |
| c.common.cdw13 = cpu_to_le32(cmd.cdw13); |
| c.common.cdw14 = cpu_to_le32(cmd.cdw14); |
| c.common.cdw15 = cpu_to_le32(cmd.cdw15); |
| |
| if (cmd.timeout_ms) |
| timeout = msecs_to_jiffies(cmd.timeout_ms); |
| |
| status = nvme_submit_user_cmd(ns ? ns->queue : ctrl->admin_q, &c, |
| nvme_to_user_ptr(cmd.addr), cmd.data_len, |
| nvme_to_user_ptr(cmd.metadata), cmd.metadata_len, |
| 0, &result, timeout); |
| |
| if (status >= 0) { |
| if (put_user(result, &ucmd->result)) |
| return -EFAULT; |
| } |
| |
| return status; |
| } |
| |
| static int nvme_user_cmd64(struct nvme_ctrl *ctrl, struct nvme_ns *ns, |
| struct nvme_passthru_cmd64 __user *ucmd) |
| { |
| struct nvme_passthru_cmd64 cmd; |
| struct nvme_command c; |
| unsigned timeout = 0; |
| int status; |
| |
| if (!capable(CAP_SYS_ADMIN)) |
| return -EACCES; |
| if (copy_from_user(&cmd, ucmd, sizeof(cmd))) |
| return -EFAULT; |
| if (cmd.flags) |
| return -EINVAL; |
| |
| memset(&c, 0, sizeof(c)); |
| c.common.opcode = cmd.opcode; |
| c.common.flags = cmd.flags; |
| c.common.nsid = cpu_to_le32(cmd.nsid); |
| c.common.cdw2[0] = cpu_to_le32(cmd.cdw2); |
| c.common.cdw2[1] = cpu_to_le32(cmd.cdw3); |
| c.common.cdw10 = cpu_to_le32(cmd.cdw10); |
| c.common.cdw11 = cpu_to_le32(cmd.cdw11); |
| c.common.cdw12 = cpu_to_le32(cmd.cdw12); |
| c.common.cdw13 = cpu_to_le32(cmd.cdw13); |
| c.common.cdw14 = cpu_to_le32(cmd.cdw14); |
| c.common.cdw15 = cpu_to_le32(cmd.cdw15); |
| |
| if (cmd.timeout_ms) |
| timeout = msecs_to_jiffies(cmd.timeout_ms); |
| |
| status = nvme_submit_user_cmd(ns ? ns->queue : ctrl->admin_q, &c, |
| nvme_to_user_ptr(cmd.addr), cmd.data_len, |
| nvme_to_user_ptr(cmd.metadata), cmd.metadata_len, |
| 0, &cmd.result, timeout); |
| |
| if (status >= 0) { |
| if (put_user(cmd.result, &ucmd->result)) |
| return -EFAULT; |
| } |
| |
| return status; |
| } |
| |
| /* |
| * Issue ioctl requests on the first available path. Note that unlike normal |
| * block layer requests we will not retry failed request on another controller. |
| */ |
| struct nvme_ns *nvme_get_ns_from_disk(struct gendisk *disk, |
| struct nvme_ns_head **head, int *srcu_idx) |
| { |
| #ifdef CONFIG_NVME_MULTIPATH |
| if (disk->fops == &nvme_ns_head_ops) { |
| struct nvme_ns *ns; |
| |
| *head = disk->private_data; |
| *srcu_idx = srcu_read_lock(&(*head)->srcu); |
| ns = nvme_find_path(*head); |
| if (!ns) |
| srcu_read_unlock(&(*head)->srcu, *srcu_idx); |
| return ns; |
| } |
| #endif |
| *head = NULL; |
| *srcu_idx = -1; |
| return disk->private_data; |
| } |
| |
| void nvme_put_ns_from_disk(struct nvme_ns_head *head, int idx) |
| { |
| if (head) |
| srcu_read_unlock(&head->srcu, idx); |
| } |
| |
| static bool is_ctrl_ioctl(unsigned int cmd) |
| { |
| if (cmd == NVME_IOCTL_ADMIN_CMD || cmd == NVME_IOCTL_ADMIN64_CMD) |
| return true; |
| if (is_sed_ioctl(cmd)) |
| return true; |
| return false; |
| } |
| |
| static int nvme_handle_ctrl_ioctl(struct nvme_ns *ns, unsigned int cmd, |
| void __user *argp, |
| struct nvme_ns_head *head, |
| int srcu_idx) |
| { |
| struct nvme_ctrl *ctrl = ns->ctrl; |
| int ret; |
| |
| nvme_get_ctrl(ns->ctrl); |
| nvme_put_ns_from_disk(head, srcu_idx); |
| |
| switch (cmd) { |
| case NVME_IOCTL_ADMIN_CMD: |
| ret = nvme_user_cmd(ctrl, NULL, argp); |
| break; |
| case NVME_IOCTL_ADMIN64_CMD: |
| ret = nvme_user_cmd64(ctrl, NULL, argp); |
| break; |
| default: |
| ret = sed_ioctl(ctrl->opal_dev, cmd, argp); |
| break; |
| } |
| nvme_put_ctrl(ctrl); |
| return ret; |
| } |
| |
| static int nvme_ioctl(struct block_device *bdev, fmode_t mode, |
| unsigned int cmd, unsigned long arg) |
| { |
| struct nvme_ns_head *head = NULL; |
| void __user *argp = (void __user *)arg; |
| struct nvme_ns *ns; |
| int srcu_idx, ret; |
| |
| ns = nvme_get_ns_from_disk(bdev->bd_disk, &head, &srcu_idx); |
| if (unlikely(!ns)) |
| return -EWOULDBLOCK; |
| |
| /* |
| * Handle ioctls that apply to the controller instead of the namespace |
| * seperately and drop the ns SRCU reference early. This avoids a |
| * deadlock when deleting namespaces using the passthrough interface. |
| */ |
| if (is_ctrl_ioctl(cmd)) |
| return nvme_handle_ctrl_ioctl(ns, cmd, argp, head, srcu_idx); |
| |
| switch (cmd) { |
| case NVME_IOCTL_ID: |
| force_successful_syscall_return(); |
| ret = ns->head->ns_id; |
| break; |
| case NVME_IOCTL_IO_CMD: |
| ret = nvme_user_cmd(ns->ctrl, ns, argp); |
| break; |
| case NVME_IOCTL_SUBMIT_IO: |
| ret = nvme_submit_io(ns, argp); |
| break; |
| case NVME_IOCTL_IO64_CMD: |
| ret = nvme_user_cmd64(ns->ctrl, ns, argp); |
| break; |
| default: |
| if (ns->ndev) |
| ret = nvme_nvm_ioctl(ns, cmd, arg); |
| else |
| ret = -ENOTTY; |
| } |
| |
| nvme_put_ns_from_disk(head, srcu_idx); |
| return ret; |
| } |
| |
| #ifdef CONFIG_COMPAT |
| struct nvme_user_io32 { |
| __u8 opcode; |
| __u8 flags; |
| __u16 control; |
| __u16 nblocks; |
| __u16 rsvd; |
| __u64 metadata; |
| __u64 addr; |
| __u64 slba; |
| __u32 dsmgmt; |
| __u32 reftag; |
| __u16 apptag; |
| __u16 appmask; |
| } __attribute__((__packed__)); |
| |
| #define NVME_IOCTL_SUBMIT_IO32 _IOW('N', 0x42, struct nvme_user_io32) |
| |
| static int nvme_compat_ioctl(struct block_device *bdev, fmode_t mode, |
| unsigned int cmd, unsigned long arg) |
| { |
| /* |
| * Corresponds to the difference of NVME_IOCTL_SUBMIT_IO |
| * between 32 bit programs and 64 bit kernel. |
| * The cause is that the results of sizeof(struct nvme_user_io), |
| * which is used to define NVME_IOCTL_SUBMIT_IO, |
| * are not same between 32 bit compiler and 64 bit compiler. |
| * NVME_IOCTL_SUBMIT_IO32 is for 64 bit kernel handling |
| * NVME_IOCTL_SUBMIT_IO issued from 32 bit programs. |
| * Other IOCTL numbers are same between 32 bit and 64 bit. |
| * So there is nothing to do regarding to other IOCTL numbers. |
| */ |
| if (cmd == NVME_IOCTL_SUBMIT_IO32) |
| return nvme_ioctl(bdev, mode, NVME_IOCTL_SUBMIT_IO, arg); |
| |
| return nvme_ioctl(bdev, mode, cmd, arg); |
| } |
| #else |
| #define nvme_compat_ioctl NULL |
| #endif /* CONFIG_COMPAT */ |
| |
| static int nvme_open(struct block_device *bdev, fmode_t mode) |
| { |
| struct nvme_ns *ns = bdev->bd_disk->private_data; |
| |
| #ifdef CONFIG_NVME_MULTIPATH |
| /* should never be called due to GENHD_FL_HIDDEN */ |
| if (WARN_ON_ONCE(ns->head->disk)) |
| goto fail; |
| #endif |
| if (!kref_get_unless_zero(&ns->kref)) |
| goto fail; |
| if (!try_module_get(ns->ctrl->ops->module)) |
| goto fail_put_ns; |
| |
| return 0; |
| |
| fail_put_ns: |
| nvme_put_ns(ns); |
| fail: |
| return -ENXIO; |
| } |
| |
| static void nvme_release(struct gendisk *disk, fmode_t mode) |
| { |
| struct nvme_ns *ns = disk->private_data; |
| |
| module_put(ns->ctrl->ops->module); |
| nvme_put_ns(ns); |
| } |
| |
| static int nvme_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
| { |
| /* some standard values */ |
| geo->heads = 1 << 6; |
| geo->sectors = 1 << 5; |
| geo->cylinders = get_capacity(bdev->bd_disk) >> 11; |
| return 0; |
| } |
| |
| #ifdef CONFIG_BLK_DEV_INTEGRITY |
| static void nvme_init_integrity(struct gendisk *disk, u16 ms, u8 pi_type, |
| u32 max_integrity_segments) |
| { |
| struct blk_integrity integrity; |
| |
| memset(&integrity, 0, sizeof(integrity)); |
| switch (pi_type) { |
| case NVME_NS_DPS_PI_TYPE3: |
| integrity.profile = &t10_pi_type3_crc; |
| integrity.tag_size = sizeof(u16) + sizeof(u32); |
| integrity.flags |= BLK_INTEGRITY_DEVICE_CAPABLE; |
| break; |
| case NVME_NS_DPS_PI_TYPE1: |
| case NVME_NS_DPS_PI_TYPE2: |
| integrity.profile = &t10_pi_type1_crc; |
| integrity.tag_size = sizeof(u16); |
| integrity.flags |= BLK_INTEGRITY_DEVICE_CAPABLE; |
| break; |
| default: |
| integrity.profile = NULL; |
| break; |
| } |
| integrity.tuple_size = ms; |
| blk_integrity_register(disk, &integrity); |
| blk_queue_max_integrity_segments(disk->queue, max_integrity_segments); |
| } |
| #else |
| static void nvme_init_integrity(struct gendisk *disk, u16 ms, u8 pi_type, |
| u32 max_integrity_segments) |
| { |
| } |
| #endif /* CONFIG_BLK_DEV_INTEGRITY */ |
| |
| static void nvme_config_discard(struct gendisk *disk, struct nvme_ns *ns) |
| { |
| struct nvme_ctrl *ctrl = ns->ctrl; |
| struct request_queue *queue = disk->queue; |
| u32 size = queue_logical_block_size(queue); |
| |
| if (!(ctrl->oncs & NVME_CTRL_ONCS_DSM)) { |
| blk_queue_flag_clear(QUEUE_FLAG_DISCARD, queue); |
| return; |
| } |
| |
| if (ctrl->nr_streams && ns->sws && ns->sgs) |
| size *= ns->sws * ns->sgs; |
| |
| BUILD_BUG_ON(PAGE_SIZE / sizeof(struct nvme_dsm_range) < |
| NVME_DSM_MAX_RANGES); |
| |
| queue->limits.discard_alignment = 0; |
| queue->limits.discard_granularity = size; |
| |
| /* If discard is already enabled, don't reset queue limits */ |
| if (blk_queue_flag_test_and_set(QUEUE_FLAG_DISCARD, queue)) |
| return; |
| |
| blk_queue_max_discard_sectors(queue, UINT_MAX); |
| blk_queue_max_discard_segments(queue, NVME_DSM_MAX_RANGES); |
| |
| if (ctrl->quirks & NVME_QUIRK_DEALLOCATE_ZEROES) |
| blk_queue_max_write_zeroes_sectors(queue, UINT_MAX); |
| } |
| |
| static void nvme_config_write_zeroes(struct gendisk *disk, struct nvme_ns *ns) |
| { |
| u64 max_blocks; |
| |
| if (!(ns->ctrl->oncs & NVME_CTRL_ONCS_WRITE_ZEROES) || |
| (ns->ctrl->quirks & NVME_QUIRK_DISABLE_WRITE_ZEROES)) |
| return; |
| /* |
| * Even though NVMe spec explicitly states that MDTS is not |
| * applicable to the write-zeroes:- "The restriction does not apply to |
| * commands that do not transfer data between the host and the |
| * controller (e.g., Write Uncorrectable ro Write Zeroes command).". |
| * In order to be more cautious use controller's max_hw_sectors value |
| * to configure the maximum sectors for the write-zeroes which is |
| * configured based on the controller's MDTS field in the |
| * nvme_init_identify() if available. |
| */ |
| if (ns->ctrl->max_hw_sectors == UINT_MAX) |
| max_blocks = (u64)USHRT_MAX + 1; |
| else |
| max_blocks = ns->ctrl->max_hw_sectors + 1; |
| |
| blk_queue_max_write_zeroes_sectors(disk->queue, |
| nvme_lba_to_sect(ns, max_blocks)); |
| } |
| |
| static bool nvme_ns_ids_valid(struct nvme_ns_ids *ids) |
| { |
| return !uuid_is_null(&ids->uuid) || |
| memchr_inv(ids->nguid, 0, sizeof(ids->nguid)) || |
| memchr_inv(ids->eui64, 0, sizeof(ids->eui64)); |
| } |
| |
| static bool nvme_ns_ids_equal(struct nvme_ns_ids *a, struct nvme_ns_ids *b) |
| { |
| return uuid_equal(&a->uuid, &b->uuid) && |
| memcmp(&a->nguid, &b->nguid, sizeof(a->nguid)) == 0 && |
| memcmp(&a->eui64, &b->eui64, sizeof(a->eui64)) == 0 && |
| a->csi == b->csi; |
| } |
| |
| static int nvme_setup_streams_ns(struct nvme_ctrl *ctrl, struct nvme_ns *ns, |
| u32 *phys_bs, u32 *io_opt) |
| { |
| struct streams_directive_params s; |
| int ret; |
| |
| if (!ctrl->nr_streams) |
| return 0; |
| |
| ret = nvme_get_stream_params(ctrl, &s, ns->head->ns_id); |
| if (ret) |
| return ret; |
| |
| ns->sws = le32_to_cpu(s.sws); |
| ns->sgs = le16_to_cpu(s.sgs); |
| |
| if (ns->sws) { |
| *phys_bs = ns->sws * (1 << ns->lba_shift); |
| if (ns->sgs) |
| *io_opt = *phys_bs * ns->sgs; |
| } |
| |
| return 0; |
| } |
| |
| static int nvme_configure_metadata(struct nvme_ns *ns, struct nvme_id_ns *id) |
| { |
| struct nvme_ctrl *ctrl = ns->ctrl; |
| |
| /* |
| * The PI implementation requires the metadata size to be equal to the |
| * t10 pi tuple size. |
| */ |
| ns->ms = le16_to_cpu(id->lbaf[id->flbas & NVME_NS_FLBAS_LBA_MASK].ms); |
| if (ns->ms == sizeof(struct t10_pi_tuple)) |
| ns->pi_type = id->dps & NVME_NS_DPS_PI_MASK; |
| else |
| ns->pi_type = 0; |
| |
| ns->features &= ~(NVME_NS_METADATA_SUPPORTED | NVME_NS_EXT_LBAS); |
| if (!ns->ms || !(ctrl->ops->flags & NVME_F_METADATA_SUPPORTED)) |
| return 0; |
| if (ctrl->ops->flags & NVME_F_FABRICS) { |
| /* |
| * The NVMe over Fabrics specification only supports metadata as |
| * part of the extended data LBA. We rely on HCA/HBA support to |
| * remap the separate metadata buffer from the block layer. |
| */ |
| if (WARN_ON_ONCE(!(id->flbas & NVME_NS_FLBAS_META_EXT))) |
| return -EINVAL; |
| if (ctrl->max_integrity_segments) |
| ns->features |= |
| (NVME_NS_METADATA_SUPPORTED | NVME_NS_EXT_LBAS); |
| } else { |
| /* |
| * For PCIe controllers, we can't easily remap the separate |
| * metadata buffer from the block layer and thus require a |
| * separate metadata buffer for block layer metadata/PI support. |
| * We allow extended LBAs for the passthrough interface, though. |
| */ |
| if (id->flbas & NVME_NS_FLBAS_META_EXT) |
| ns->features |= NVME_NS_EXT_LBAS; |
| else |
| ns->features |= NVME_NS_METADATA_SUPPORTED; |
| } |
| |
| return 0; |
| } |
| |
| static void nvme_set_queue_limits(struct nvme_ctrl *ctrl, |
| struct request_queue *q) |
| { |
| bool vwc = ctrl->vwc & NVME_CTRL_VWC_PRESENT; |
| |
| if (ctrl->max_hw_sectors) { |
| u32 max_segments = |
| (ctrl->max_hw_sectors / (NVME_CTRL_PAGE_SIZE >> 9)) + 1; |
| |
| max_segments = min_not_zero(max_segments, ctrl->max_segments); |
| blk_queue_max_hw_sectors(q, ctrl->max_hw_sectors); |
| blk_queue_max_segments(q, min_t(u32, max_segments, USHRT_MAX)); |
| } |
| blk_queue_virt_boundary(q, NVME_CTRL_PAGE_SIZE - 1); |
| blk_queue_dma_alignment(q, 7); |
| blk_queue_write_cache(q, vwc, vwc); |
| } |
| |
| static void nvme_update_disk_info(struct gendisk *disk, |
| struct nvme_ns *ns, struct nvme_id_ns *id) |
| { |
| sector_t capacity = nvme_lba_to_sect(ns, le64_to_cpu(id->nsze)); |
| unsigned short bs = 1 << ns->lba_shift; |
| u32 atomic_bs, phys_bs, io_opt = 0; |
| |
| /* |
| * The block layer can't support LBA sizes larger than the page size |
| * yet, so catch this early and don't allow block I/O. |
| */ |
| if (ns->lba_shift > PAGE_SHIFT) { |
| capacity = 0; |
| bs = (1 << 9); |
| } |
| |
| blk_integrity_unregister(disk); |
| |
| atomic_bs = phys_bs = bs; |
| nvme_setup_streams_ns(ns->ctrl, ns, &phys_bs, &io_opt); |
| if (id->nabo == 0) { |
| /* |
| * Bit 1 indicates whether NAWUPF is defined for this namespace |
| * and whether it should be used instead of AWUPF. If NAWUPF == |
| * 0 then AWUPF must be used instead. |
| */ |
| if (id->nsfeat & NVME_NS_FEAT_ATOMICS && id->nawupf) |
| atomic_bs = (1 + le16_to_cpu(id->nawupf)) * bs; |
| else |
| atomic_bs = (1 + ns->ctrl->subsys->awupf) * bs; |
| } |
| |
| if (id->nsfeat & NVME_NS_FEAT_IO_OPT) { |
| /* NPWG = Namespace Preferred Write Granularity */ |
| phys_bs = bs * (1 + le16_to_cpu(id->npwg)); |
| /* NOWS = Namespace Optimal Write Size */ |
| io_opt = bs * (1 + le16_to_cpu(id->nows)); |
| } |
| |
| blk_queue_logical_block_size(disk->queue, bs); |
| /* |
| * Linux filesystems assume writing a single physical block is |
| * an atomic operation. Hence limit the physical block size to the |
| * value of the Atomic Write Unit Power Fail parameter. |
| */ |
| blk_queue_physical_block_size(disk->queue, min(phys_bs, atomic_bs)); |
| blk_queue_io_min(disk->queue, phys_bs); |
| blk_queue_io_opt(disk->queue, io_opt); |
| |
| /* |
| * Register a metadata profile for PI, or the plain non-integrity NVMe |
| * metadata masquerading as Type 0 if supported, otherwise reject block |
| * I/O to namespaces with metadata except when the namespace supports |
| * PI, as it can strip/insert in that case. |
| */ |
| if (ns->ms) { |
| if (IS_ENABLED(CONFIG_BLK_DEV_INTEGRITY) && |
| (ns->features & NVME_NS_METADATA_SUPPORTED)) |
| nvme_init_integrity(disk, ns->ms, ns->pi_type, |
| ns->ctrl->max_integrity_segments); |
| else if (!nvme_ns_has_pi(ns)) |
| capacity = 0; |
| } |
| |
| set_capacity_and_notify(disk, capacity); |
| |
| nvme_config_discard(disk, ns); |
| nvme_config_write_zeroes(disk, ns); |
| |
| if ((id->nsattr & NVME_NS_ATTR_RO) || |
| test_bit(NVME_NS_FORCE_RO, &ns->flags)) |
| set_disk_ro(disk, true); |
| } |
| |
| static inline bool nvme_first_scan(struct gendisk *disk) |
| { |
| /* nvme_alloc_ns() scans the disk prior to adding it */ |
| return !(disk->flags & GENHD_FL_UP); |
| } |
| |
| static void nvme_set_chunk_sectors(struct nvme_ns *ns, struct nvme_id_ns *id) |
| { |
| struct nvme_ctrl *ctrl = ns->ctrl; |
| u32 iob; |
| |
| if ((ctrl->quirks & NVME_QUIRK_STRIPE_SIZE) && |
| is_power_of_2(ctrl->max_hw_sectors)) |
| iob = ctrl->max_hw_sectors; |
| else |
| iob = nvme_lba_to_sect(ns, le16_to_cpu(id->noiob)); |
| |
| if (!iob) |
| return; |
| |
| if (!is_power_of_2(iob)) { |
| if (nvme_first_scan(ns->disk)) |
| pr_warn("%s: ignoring unaligned IO boundary:%u\n", |
| ns->disk->disk_name, iob); |
| return; |
| } |
| |
| if (blk_queue_is_zoned(ns->disk->queue)) { |
| if (nvme_first_scan(ns->disk)) |
| pr_warn("%s: ignoring zoned namespace IO boundary\n", |
| ns->disk->disk_name); |
| return; |
| } |
| |
| blk_queue_chunk_sectors(ns->queue, iob); |
| } |
| |
| static int nvme_update_ns_info(struct nvme_ns *ns, struct nvme_id_ns *id) |
| { |
| unsigned lbaf = id->flbas & NVME_NS_FLBAS_LBA_MASK; |
| int ret; |
| |
| blk_mq_freeze_queue(ns->disk->queue); |
| ns->lba_shift = id->lbaf[lbaf].ds; |
| nvme_set_queue_limits(ns->ctrl, ns->queue); |
| |
| if (ns->head->ids.csi == NVME_CSI_ZNS) { |
| ret = nvme_update_zone_info(ns, lbaf); |
| if (ret) |
| goto out_unfreeze; |
| } |
| |
| ret = nvme_configure_metadata(ns, id); |
| if (ret) |
| goto out_unfreeze; |
| nvme_set_chunk_sectors(ns, id); |
| nvme_update_disk_info(ns->disk, ns, id); |
| blk_mq_unfreeze_queue(ns->disk->queue); |
| |
| if (blk_queue_is_zoned(ns->queue)) { |
| ret = nvme_revalidate_zones(ns); |
| if (ret && !nvme_first_scan(ns->disk)) |
| return ret; |
| } |
| |
| #ifdef CONFIG_NVME_MULTIPATH |
| if (ns->head->disk) { |
| blk_mq_freeze_queue(ns->head->disk->queue); |
| nvme_update_disk_info(ns->head->disk, ns, id); |
| blk_stack_limits(&ns->head->disk->queue->limits, |
| &ns->queue->limits, 0); |
| blk_queue_update_readahead(ns->head->disk->queue); |
| blk_mq_unfreeze_queue(ns->head->disk->queue); |
| } |
| #endif |
| return 0; |
| |
| out_unfreeze: |
| blk_mq_unfreeze_queue(ns->disk->queue); |
| return ret; |
| } |
| |
| static char nvme_pr_type(enum pr_type type) |
| { |
| switch (type) { |
| case PR_WRITE_EXCLUSIVE: |
| return 1; |
| case PR_EXCLUSIVE_ACCESS: |
| return 2; |
| case PR_WRITE_EXCLUSIVE_REG_ONLY: |
| return 3; |
| case PR_EXCLUSIVE_ACCESS_REG_ONLY: |
| return 4; |
| case PR_WRITE_EXCLUSIVE_ALL_REGS: |
| return 5; |
| case PR_EXCLUSIVE_ACCESS_ALL_REGS: |
| return 6; |
| default: |
| return 0; |
| } |
| }; |
| |
| static int nvme_pr_command(struct block_device *bdev, u32 cdw10, |
| u64 key, u64 sa_key, u8 op) |
| { |
| struct nvme_ns_head *head = NULL; |
| struct nvme_ns *ns; |
| struct nvme_command c; |
| int srcu_idx, ret; |
| u8 data[16] = { 0, }; |
| |
| ns = nvme_get_ns_from_disk(bdev->bd_disk, &head, &srcu_idx); |
| if (unlikely(!ns)) |
| return -EWOULDBLOCK; |
| |
| put_unaligned_le64(key, &data[0]); |
| put_unaligned_le64(sa_key, &data[8]); |
| |
| memset(&c, 0, sizeof(c)); |
| c.common.opcode = op; |
| c.common.nsid = cpu_to_le32(ns->head->ns_id); |
| c.common.cdw10 = cpu_to_le32(cdw10); |
| |
| ret = nvme_submit_sync_cmd(ns->queue, &c, data, 16); |
| nvme_put_ns_from_disk(head, srcu_idx); |
| return ret; |
| } |
| |
| static int nvme_pr_register(struct block_device *bdev, u64 old, |
| u64 new, unsigned flags) |
| { |
| u32 cdw10; |
| |
| if (flags & ~PR_FL_IGNORE_KEY) |
| return -EOPNOTSUPP; |
| |
| cdw10 = old ? 2 : 0; |
| cdw10 |= (flags & PR_FL_IGNORE_KEY) ? 1 << 3 : 0; |
| cdw10 |= (1 << 30) | (1 << 31); /* PTPL=1 */ |
| return nvme_pr_command(bdev, cdw10, old, new, nvme_cmd_resv_register); |
| } |
| |
| static int nvme_pr_reserve(struct block_device *bdev, u64 key, |
| enum pr_type type, unsigned flags) |
| { |
| u32 cdw10; |
| |
| if (flags & ~PR_FL_IGNORE_KEY) |
| return -EOPNOTSUPP; |
| |
| cdw10 = nvme_pr_type(type) << 8; |
| cdw10 |= ((flags & PR_FL_IGNORE_KEY) ? 1 << 3 : 0); |
| return nvme_pr_command(bdev, cdw10, key, 0, nvme_cmd_resv_acquire); |
| } |
| |
| static int nvme_pr_preempt(struct block_device *bdev, u64 old, u64 new, |
| enum pr_type type, bool abort) |
| { |
| u32 cdw10 = nvme_pr_type(type) << 8 | (abort ? 2 : 1); |
| return nvme_pr_command(bdev, cdw10, old, new, nvme_cmd_resv_acquire); |
| } |
| |
| static int nvme_pr_clear(struct block_device *bdev, u64 key) |
| { |
| u32 cdw10 = 1 | (key ? 1 << 3 : 0); |
| return nvme_pr_command(bdev, cdw10, key, 0, nvme_cmd_resv_register); |
| } |
| |
| static int nvme_pr_release(struct block_device *bdev, u64 key, enum pr_type type) |
| { |
| u32 cdw10 = nvme_pr_type(type) << 8 | (key ? 1 << 3 : 0); |
| return nvme_pr_command(bdev, cdw10, key, 0, nvme_cmd_resv_release); |
| } |
| |
| static const struct pr_ops nvme_pr_ops = { |
| .pr_register = nvme_pr_register, |
| .pr_reserve = nvme_pr_reserve, |
| .pr_release = nvme_pr_release, |
| .pr_preempt = nvme_pr_preempt, |
| .pr_clear = nvme_pr_clear, |
| }; |
| |
| #ifdef CONFIG_BLK_SED_OPAL |
| int nvme_sec_submit(void *data, u16 spsp, u8 secp, void *buffer, size_t len, |
| bool send) |
| { |
| struct nvme_ctrl *ctrl = data; |
| struct nvme_command cmd; |
| |
| memset(&cmd, 0, sizeof(cmd)); |
| if (send) |
| cmd.common.opcode = nvme_admin_security_send; |
| else |
| cmd.common.opcode = nvme_admin_security_recv; |
| cmd.common.nsid = 0; |
| cmd.common.cdw10 = cpu_to_le32(((u32)secp) << 24 | ((u32)spsp) << 8); |
| cmd.common.cdw11 = cpu_to_le32(len); |
| |
| return __nvme_submit_sync_cmd(ctrl->admin_q, &cmd, NULL, buffer, len, 0, |
| NVME_QID_ANY, 1, 0, false); |
| } |
| EXPORT_SYMBOL_GPL(nvme_sec_submit); |
| #endif /* CONFIG_BLK_SED_OPAL */ |
| |
| static const struct block_device_operations nvme_bdev_ops = { |
| .owner = THIS_MODULE, |
| .ioctl = nvme_ioctl, |
| .compat_ioctl = nvme_compat_ioctl, |
| .open = nvme_open, |
| .release = nvme_release, |
| .getgeo = nvme_getgeo, |
| .report_zones = nvme_report_zones, |
| .pr_ops = &nvme_pr_ops, |
| }; |
| |
| #ifdef CONFIG_NVME_MULTIPATH |
| static int nvme_ns_head_open(struct block_device *bdev, fmode_t mode) |
| { |
| struct nvme_ns_head *head = bdev->bd_disk->private_data; |
| |
| if (!kref_get_unless_zero(&head->ref)) |
| return -ENXIO; |
| return 0; |
| } |
| |
| static void nvme_ns_head_release(struct gendisk *disk, fmode_t mode) |
| { |
| nvme_put_ns_head(disk->private_data); |
| } |
| |
| const struct block_device_operations nvme_ns_head_ops = { |
| .owner = THIS_MODULE, |
| .submit_bio = nvme_ns_head_submit_bio, |
| .open = nvme_ns_head_open, |
| .release = nvme_ns_head_release, |
| .ioctl = nvme_ioctl, |
| .compat_ioctl = nvme_compat_ioctl, |
| .getgeo = nvme_getgeo, |
| .report_zones = nvme_report_zones, |
| .pr_ops = &nvme_pr_ops, |
| }; |
| #endif /* CONFIG_NVME_MULTIPATH */ |
| |
| static int nvme_wait_ready(struct nvme_ctrl *ctrl, u64 cap, bool enabled) |
| { |
| unsigned long timeout = |
| ((NVME_CAP_TIMEOUT(cap) + 1) * HZ / 2) + jiffies; |
| u32 csts, bit = enabled ? NVME_CSTS_RDY : 0; |
| int ret; |
| |
| while ((ret = ctrl->ops->reg_read32(ctrl, NVME_REG_CSTS, &csts)) == 0) { |
| if (csts == ~0) |
| return -ENODEV; |
| if ((csts & NVME_CSTS_RDY) == bit) |
| break; |
| |
| usleep_range(1000, 2000); |
| if (fatal_signal_pending(current)) |
| return -EINTR; |
| if (time_after(jiffies, timeout)) { |
| dev_err(ctrl->device, |
| "Device not ready; aborting %s, CSTS=0x%x\n", |
| enabled ? "initialisation" : "reset", csts); |
| return -ENODEV; |
| } |
| } |
| |
| return ret; |
| } |
| |
| /* |
| * If the device has been passed off to us in an enabled state, just clear |
| * the enabled bit. The spec says we should set the 'shutdown notification |
| * bits', but doing so may cause the device to complete commands to the |
| * admin queue ... and we don't know what memory that might be pointing at! |
| */ |
| int nvme_disable_ctrl(struct nvme_ctrl *ctrl) |
| { |
| int ret; |
| |
| ctrl->ctrl_config &= ~NVME_CC_SHN_MASK; |
| ctrl->ctrl_config &= ~NVME_CC_ENABLE; |
| |
| ret = ctrl->ops->reg_write32(ctrl, NVME_REG_CC, ctrl->ctrl_config); |
| if (ret) |
| return ret; |
| |
| if (ctrl->quirks & NVME_QUIRK_DELAY_BEFORE_CHK_RDY) |
| msleep(NVME_QUIRK_DELAY_AMOUNT); |
| |
| return nvme_wait_ready(ctrl, ctrl->cap, false); |
| } |
| EXPORT_SYMBOL_GPL(nvme_disable_ctrl); |
| |
| int nvme_enable_ctrl(struct nvme_ctrl *ctrl) |
| { |
| unsigned dev_page_min; |
| int ret; |
| |
| ret = ctrl->ops->reg_read64(ctrl, NVME_REG_CAP, &ctrl->cap); |
| if (ret) { |
| dev_err(ctrl->device, "Reading CAP failed (%d)\n", ret); |
| return ret; |
| } |
| dev_page_min = NVME_CAP_MPSMIN(ctrl->cap) + 12; |
| |
| if (NVME_CTRL_PAGE_SHIFT < dev_page_min) { |
| dev_err(ctrl->device, |
| "Minimum device page size %u too large for host (%u)\n", |
| 1 << dev_page_min, 1 << NVME_CTRL_PAGE_SHIFT); |
| return -ENODEV; |
| } |
| |
| if (NVME_CAP_CSS(ctrl->cap) & NVME_CAP_CSS_CSI) |
| ctrl->ctrl_config = NVME_CC_CSS_CSI; |
| else |
| ctrl->ctrl_config = NVME_CC_CSS_NVM; |
| ctrl->ctrl_config |= (NVME_CTRL_PAGE_SHIFT - 12) << NVME_CC_MPS_SHIFT; |
| ctrl->ctrl_config |= NVME_CC_AMS_RR | NVME_CC_SHN_NONE; |
| ctrl->ctrl_config |= NVME_CC_IOSQES | NVME_CC_IOCQES; |
| ctrl->ctrl_config |= NVME_CC_ENABLE; |
| |
| ret = ctrl->ops->reg_write32(ctrl, NVME_REG_CC, ctrl->ctrl_config); |
| if (ret) |
| return ret; |
| return nvme_wait_ready(ctrl, ctrl->cap, true); |
| } |
| EXPORT_SYMBOL_GPL(nvme_enable_ctrl); |
| |
| int nvme_shutdown_ctrl(struct nvme_ctrl *ctrl) |
| { |
| unsigned long timeout = jiffies + (ctrl->shutdown_timeout * HZ); |
| u32 csts; |
| int ret; |
| |
| ctrl->ctrl_config &= ~NVME_CC_SHN_MASK; |
| ctrl->ctrl_config |= NVME_CC_SHN_NORMAL; |
| |
| ret = ctrl->ops->reg_write32(ctrl, NVME_REG_CC, ctrl->ctrl_config); |
| if (ret) |
| return ret; |
| |
| while ((ret = ctrl->ops->reg_read32(ctrl, NVME_REG_CSTS, &csts)) == 0) { |
| if ((csts & NVME_CSTS_SHST_MASK) == NVME_CSTS_SHST_CMPLT) |
| break; |
| |
| msleep(100); |
| if (fatal_signal_pending(current)) |
| return -EINTR; |
| if (time_after(jiffies, timeout)) { |
| dev_err(ctrl->device, |
| "Device shutdown incomplete; abort shutdown\n"); |
| return -ENODEV; |
| } |
| } |
| |
| return ret; |
| } |
| EXPORT_SYMBOL_GPL(nvme_shutdown_ctrl); |
| |
| static int nvme_configure_timestamp(struct nvme_ctrl *ctrl) |
| { |
| __le64 ts; |
| int ret; |
| |
| if (!(ctrl->oncs & NVME_CTRL_ONCS_TIMESTAMP)) |
| return 0; |
| |
| ts = cpu_to_le64(ktime_to_ms(ktime_get_real())); |
| ret = nvme_set_features(ctrl, NVME_FEAT_TIMESTAMP, 0, &ts, sizeof(ts), |
| NULL); |
| if (ret) |
| dev_warn_once(ctrl->device, |
| "could not set timestamp (%d)\n", ret); |
| return ret; |
| } |
| |
| static int nvme_configure_acre(struct nvme_ctrl *ctrl) |
| { |
| struct nvme_feat_host_behavior *host; |
| int ret; |
| |
| /* Don't bother enabling the feature if retry delay is not reported */ |
| if (!ctrl->crdt[0]) |
| return 0; |
| |
| host = kzalloc(sizeof(*host), GFP_KERNEL); |
| if (!host) |
| return 0; |
| |
| host->acre = NVME_ENABLE_ACRE; |
| ret = nvme_set_features(ctrl, NVME_FEAT_HOST_BEHAVIOR, 0, |
| host, sizeof(*host), NULL); |
| kfree(host); |
| return ret; |
| } |
| |
| static int nvme_configure_apst(struct nvme_ctrl *ctrl) |
| { |
| /* |
| * APST (Autonomous Power State Transition) lets us program a |
| * table of power state transitions that the controller will |
| * perform automatically. We configure it with a simple |
| * heuristic: we are willing to spend at most 2% of the time |
| * transitioning between power states. Therefore, when running |
| * in any given state, we will enter the next lower-power |
| * non-operational state after waiting 50 * (enlat + exlat) |
| * microseconds, as long as that state's exit latency is under |
| * the requested maximum latency. |
| * |
| * We will not autonomously enter any non-operational state for |
| * which the total latency exceeds ps_max_latency_us. Users |
| * can set ps_max_latency_us to zero to turn off APST. |
| */ |
| |
| unsigned apste; |
| struct nvme_feat_auto_pst *table; |
| u64 max_lat_us = 0; |
| int max_ps = -1; |
| int ret; |
| |
| /* |
| * If APST isn't supported or if we haven't been initialized yet, |
| * then don't do anything. |
| */ |
| if (!ctrl->apsta) |
| return 0; |
| |
| if (ctrl->npss > 31) { |
| dev_warn(ctrl->device, "NPSS is invalid; not using APST\n"); |
| return 0; |
| } |
| |
| table = kzalloc(sizeof(*table), GFP_KERNEL); |
| if (!table) |
| return 0; |
| |
| if (!ctrl->apst_enabled || ctrl->ps_max_latency_us == 0) { |
| /* Turn off APST. */ |
| apste = 0; |
| dev_dbg(ctrl->device, "APST disabled\n"); |
| } else { |
| __le64 target = cpu_to_le64(0); |
| int state; |
| |
| /* |
| * Walk through all states from lowest- to highest-power. |
| * According to the spec, lower-numbered states use more |
| * power. NPSS, despite the name, is the index of the |
| * lowest-power state, not the number of states. |
| */ |
| for (state = (int)ctrl->npss; state >= 0; state--) { |
| u64 total_latency_us, exit_latency_us, transition_ms; |
| |
| if (target) |
| table->entries[state] = target; |
| |
| /* |
| * Don't allow transitions to the deepest state |
| * if it's quirked off. |
| */ |
| if (state == ctrl->npss && |
| (ctrl->quirks & NVME_QUIRK_NO_DEEPEST_PS)) |
| continue; |
| |
| /* |
| * Is this state a useful non-operational state for |
| * higher-power states to autonomously transition to? |
| */ |
| if (!(ctrl->psd[state].flags & |
| NVME_PS_FLAGS_NON_OP_STATE)) |
| continue; |
| |
| exit_latency_us = |
| (u64)le32_to_cpu(ctrl->psd[state].exit_lat); |
| if (exit_latency_us > ctrl->ps_max_latency_us) |
| continue; |
| |
| total_latency_us = |
| exit_latency_us + |
| le32_to_cpu(ctrl->psd[state].entry_lat); |
| |
| /* |
| * This state is good. Use it as the APST idle |
| * target for higher power states. |
| */ |
| transition_ms = total_latency_us + 19; |
| do_div(transition_ms, 20); |
| if (transition_ms > (1 << 24) - 1) |
| transition_ms = (1 << 24) - 1; |
| |
| target = cpu_to_le64((state << 3) | |
| (transition_ms << 8)); |
| |
| if (max_ps == -1) |
| max_ps = state; |
| |
| if (total_latency_us > max_lat_us) |
| max_lat_us = total_latency_us; |
| } |
| |
| apste = 1; |
| |
| if (max_ps == -1) { |
| dev_dbg(ctrl->device, "APST enabled but no non-operational states are available\n"); |
| } else { |
| dev_dbg(ctrl->device, "APST enabled: max PS = %d, max round-trip latency = %lluus, table = %*phN\n", |
| max_ps, max_lat_us, (int)sizeof(*table), table); |
| } |
| } |
| |
| ret = nvme_set_features(ctrl, NVME_FEAT_AUTO_PST, apste, |
| table, sizeof(*table), NULL); |
| if (ret) |
| dev_err(ctrl->device, "failed to set APST feature (%d)\n", ret); |
| |
| kfree(table); |
| return ret; |
| } |
| |
| static void nvme_set_latency_tolerance(struct device *dev, s32 val) |
| { |
| struct nvme_ctrl *ctrl = dev_get_drvdata(dev); |
| u64 latency; |
| |
| switch (val) { |
| case PM_QOS_LATENCY_TOLERANCE_NO_CONSTRAINT: |
| case PM_QOS_LATENCY_ANY: |
| latency = U64_MAX; |
| break; |
| |
| default: |
| latency = val; |
| } |
| |
| if (ctrl->ps_max_latency_us != latency) { |
| ctrl->ps_max_latency_us = latency; |
| nvme_configure_apst(ctrl); |
| } |
| } |
| |
| struct nvme_core_quirk_entry { |
| /* |
| * NVMe model and firmware strings are padded with spaces. For |
| * simplicity, strings in the quirk table are padded with NULLs |
| * instead. |
| */ |
| u16 vid; |
| const char *mn; |
| const char *fr; |
| unsigned long quirks; |
| }; |
| |
| static const struct nvme_core_quirk_entry core_quirks[] = { |
| { |
| /* |
| * This Toshiba device seems to die using any APST states. See: |
| * https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1678184/comments/11 |
| */ |
| .vid = 0x1179, |
| .mn = "THNSF5256GPUK TOSHIBA", |
| .quirks = NVME_QUIRK_NO_APST, |
| }, |
| { |
| /* |
| * This LiteON CL1-3D*-Q11 firmware version has a race |
| * condition associated with actions related to suspend to idle |
| * LiteON has resolved the problem in future firmware |
| */ |
| .vid = 0x14a4, |
| .fr = "22301111", |
| .quirks = NVME_QUIRK_SIMPLE_SUSPEND, |
| } |
| }; |
| |
| /* match is null-terminated but idstr is space-padded. */ |
| static bool string_matches(const char *idstr, const char *match, size_t len) |
| { |
| size_t matchlen; |
| |
| if (!match) |
| return true; |
| |
| matchlen = strlen(match); |
| WARN_ON_ONCE(matchlen > len); |
| |
| if (memcmp(idstr, match, matchlen)) |
| return false; |
| |
| for (; matchlen < len; matchlen++) |
| if (idstr[matchlen] != ' ') |
| return false; |
| |
| return true; |
| } |
| |
| static bool quirk_matches(const struct nvme_id_ctrl *id, |
| const struct nvme_core_quirk_entry *q) |
| { |
| return q->vid == le16_to_cpu(id->vid) && |
| string_matches(id->mn, q->mn, sizeof(id->mn)) && |
| string_matches(id->fr, q->fr, sizeof(id->fr)); |
| } |
| |
| static void nvme_init_subnqn(struct nvme_subsystem *subsys, struct nvme_ctrl *ctrl, |
| struct nvme_id_ctrl *id) |
| { |
| size_t nqnlen; |
| int off; |
| |
| if(!(ctrl->quirks & NVME_QUIRK_IGNORE_DEV_SUBNQN)) { |
| nqnlen = strnlen(id->subnqn, NVMF_NQN_SIZE); |
| if (nqnlen > 0 && nqnlen < NVMF_NQN_SIZE) { |
| strlcpy(subsys->subnqn, id->subnqn, NVMF_NQN_SIZE); |
| return; |
| } |
| |
| if (ctrl->vs >= NVME_VS(1, 2, 1)) |
| dev_warn(ctrl->device, "missing or invalid SUBNQN field.\n"); |
| } |
| |
| /* Generate a "fake" NQN per Figure 254 in NVMe 1.3 + ECN 001 */ |
| off = snprintf(subsys->subnqn, NVMF_NQN_SIZE, |
| "nqn.2014.08.org.nvmexpress:%04x%04x", |
| le16_to_cpu(id->vid), le16_to_cpu(id->ssvid)); |
| memcpy(subsys->subnqn + off, id->sn, sizeof(id->sn)); |
| off += sizeof(id->sn); |
| memcpy(subsys->subnqn + off, id->mn, sizeof(id->mn)); |
| off += sizeof(id->mn); |
| memset(subsys->subnqn + off, 0, sizeof(subsys->subnqn) - off); |
| } |
| |
| static void nvme_release_subsystem(struct device *dev) |
| { |
| struct nvme_subsystem *subsys = |
| container_of(dev, struct nvme_subsystem, dev); |
| |
| if (subsys->instance >= 0) |
| ida_simple_remove(&nvme_instance_ida, subsys->instance); |
| kfree(subsys); |
| } |
| |
| static void nvme_destroy_subsystem(struct kref *ref) |
| { |
| struct nvme_subsystem *subsys = |
| container_of(ref, struct nvme_subsystem, ref); |
| |
| mutex_lock(&nvme_subsystems_lock); |
| list_del(&subsys->entry); |
| mutex_unlock(&nvme_subsystems_lock); |
| |
| ida_destroy(&subsys->ns_ida); |
| device_del(&subsys->dev); |
| put_device(&subsys->dev); |
| } |
| |
| static void nvme_put_subsystem(struct nvme_subsystem *subsys) |
| { |
| kref_put(&subsys->ref, nvme_destroy_subsystem); |
| } |
| |
| static struct nvme_subsystem *__nvme_find_get_subsystem(const char *subsysnqn) |
| { |
| struct nvme_subsystem *subsys; |
| |
| lockdep_assert_held(&nvme_subsystems_lock); |
| |
| /* |
| * Fail matches for discovery subsystems. This results |
| * in each discovery controller bound to a unique subsystem. |
| * This avoids issues with validating controller values |
| * that can only be true when there is a single unique subsystem. |
| * There may be multiple and completely independent entities |
| * that provide discovery controllers. |
| */ |
| if (!strcmp(subsysnqn, NVME_DISC_SUBSYS_NAME)) |
| return NULL; |
| |
| list_for_each_entry(subsys, &nvme_subsystems, entry) { |
| if (strcmp(subsys->subnqn, subsysnqn)) |
| continue; |
| if (!kref_get_unless_zero(&subsys->ref)) |
| continue; |
| return subsys; |
| } |
| |
| return NULL; |
| } |
| |
| #define SUBSYS_ATTR_RO(_name, _mode, _show) \ |
| struct device_attribute subsys_attr_##_name = \ |
| __ATTR(_name, _mode, _show, NULL) |
| |
| static ssize_t nvme_subsys_show_nqn(struct device *dev, |
| struct device_attribute *attr, |
| char *buf) |
| { |
| struct nvme_subsystem *subsys = |
| container_of(dev, struct nvme_subsystem, dev); |
| |
| return snprintf(buf, PAGE_SIZE, "%s\n", subsys->subnqn); |
| } |
| static SUBSYS_ATTR_RO(subsysnqn, S_IRUGO, nvme_subsys_show_nqn); |
| |
| #define nvme_subsys_show_str_function(field) \ |
| static ssize_t subsys_##field##_show(struct device *dev, \ |
| struct device_attribute *attr, char *buf) \ |
| { \ |
| struct nvme_subsystem *subsys = \ |
| container_of(dev, struct nvme_subsystem, dev); \ |
| return sprintf(buf, "%.*s\n", \ |
| (int)sizeof(subsys->field), subsys->field); \ |
| } \ |
| static SUBSYS_ATTR_RO(field, S_IRUGO, subsys_##field##_show); |
| |
| nvme_subsys_show_str_function(model); |
| nvme_subsys_show_str_function(serial); |
| nvme_subsys_show_str_function(firmware_rev); |
| |
| static struct attribute *nvme_subsys_attrs[] = { |
| &subsys_attr_model.attr, |
| &subsys_attr_serial.attr, |
| &subsys_attr_firmware_rev.attr, |
| &subsys_attr_subsysnqn.attr, |
| #ifdef CONFIG_NVME_MULTIPATH |
| &subsys_attr_iopolicy.attr, |
| #endif |
| NULL, |
| }; |
| |
| static struct attribute_group nvme_subsys_attrs_group = { |
| .attrs = nvme_subsys_attrs, |
| }; |
| |
| static const struct attribute_group *nvme_subsys_attrs_groups[] = { |
| &nvme_subsys_attrs_group, |
| NULL, |
| }; |
| |
| static inline bool nvme_discovery_ctrl(struct nvme_ctrl *ctrl) |
| { |
| return ctrl->opts && ctrl->opts->discovery_nqn; |
| } |
| |
| static bool nvme_validate_cntlid(struct nvme_subsystem *subsys, |
| struct nvme_ctrl *ctrl, struct nvme_id_ctrl *id) |
| { |
| struct nvme_ctrl *tmp; |
| |
| lockdep_assert_held(&nvme_subsystems_lock); |
| |
| list_for_each_entry(tmp, &subsys->ctrls, subsys_entry) { |
| if (nvme_state_terminal(tmp)) |
| continue; |
| |
| if (tmp->cntlid == ctrl->cntlid) { |
| dev_err(ctrl->device, |
| "Duplicate cntlid %u with %s, rejecting\n", |
| ctrl->cntlid, dev_name(tmp->device)); |
| return false; |
| } |
| |
| if ((id->cmic & NVME_CTRL_CMIC_MULTI_CTRL) || |
| nvme_discovery_ctrl(ctrl)) |
| continue; |
| |
| dev_err(ctrl->device, |
| "Subsystem does not support multiple controllers\n"); |
| return false; |
| } |
| |
| return true; |
| } |
| |
| static int nvme_init_subsystem(struct nvme_ctrl *ctrl, struct nvme_id_ctrl *id) |
| { |
| struct nvme_subsystem *subsys, *found; |
| int ret; |
| |
| subsys = kzalloc(sizeof(*subsys), GFP_KERNEL); |
| if (!subsys) |
| return -ENOMEM; |
| |
| subsys->instance = -1; |
| mutex_init(&subsys->lock); |
| kref_init(&subsys->ref); |
| INIT_LIST_HEAD(&subsys->ctrls); |
| INIT_LIST_HEAD(&subsys->nsheads); |
| nvme_init_subnqn(subsys, ctrl, id); |
| memcpy(subsys->serial, id->sn, sizeof(subsys->serial)); |
| memcpy(subsys->model, id->mn, sizeof(subsys->model)); |
| memcpy(subsys->firmware_rev, id->fr, sizeof(subsys->firmware_rev)); |
| subsys->vendor_id = le16_to_cpu(id->vid); |
| subsys->cmic = id->cmic; |
| subsys->awupf = le16_to_cpu(id->awupf); |
| #ifdef CONFIG_NVME_MULTIPATH |
| subsys->iopolicy = NVME_IOPOLICY_NUMA; |
| #endif |
| |
| subsys->dev.class = nvme_subsys_class; |
| subsys->dev.release = nvme_release_subsystem; |
| subsys->dev.groups = nvme_subsys_attrs_groups; |
| dev_set_name(&subsys->dev, "nvme-subsys%d", ctrl->instance); |
| device_initialize(&subsys->dev); |
| |
| mutex_lock(&nvme_subsystems_lock); |
| found = __nvme_find_get_subsystem(subsys->subnqn); |
| if (found) { |
| put_device(&subsys->dev); |
| subsys = found; |
| |
| if (!nvme_validate_cntlid(subsys, ctrl, id)) { |
| ret = -EINVAL; |
| goto out_put_subsystem; |
| } |
| } else { |
| ret = device_add(&subsys->dev); |
| if (ret) { |
| dev_err(ctrl->device, |
| "failed to register subsystem device.\n"); |
| put_device(&subsys->dev); |
| goto out_unlock; |
| } |
| ida_init(&subsys->ns_ida); |
| list_add_tail(&subsys->entry, &nvme_subsystems); |
| } |
| |
| ret = sysfs_create_link(&subsys->dev.kobj, &ctrl->device->kobj, |
| dev_name(ctrl->device)); |
| if (ret) { |
| dev_err(ctrl->device, |
| "failed to create sysfs link from subsystem.\n"); |
| goto out_put_subsystem; |
| } |
| |
| if (!found) |
| subsys->instance = ctrl->instance; |
| ctrl->subsys = subsys; |
| list_add_tail(&ctrl->subsys_entry, &subsys->ctrls); |
| mutex_unlock(&nvme_subsystems_lock); |
| return 0; |
| |
| out_put_subsystem: |
| nvme_put_subsystem(subsys); |
| out_unlock: |
| mutex_unlock(&nvme_subsystems_lock); |
| return ret; |
| } |
| |
| int nvme_get_log(struct nvme_ctrl *ctrl, u32 nsid, u8 log_page, u8 lsp, u8 csi, |
| void *log, size_t size, u64 offset) |
| { |
| struct nvme_command c = { }; |
| u32 dwlen = nvme_bytes_to_numd(size); |
| |
| c.get_log_page.opcode = nvme_admin_get_log_page; |
| c.get_log_page.nsid = cpu_to_le32(nsid); |
| c.get_log_page.lid = log_page; |
| c.get_log_page.lsp = lsp; |
| c.get_log_page.numdl = cpu_to_le16(dwlen & ((1 << 16) - 1)); |
| c.get_log_page.numdu = cpu_to_le16(dwlen >> 16); |
| c.get_log_page.lpol = cpu_to_le32(lower_32_bits(offset)); |
| c.get_log_page.lpou = cpu_to_le32(upper_32_bits(offset)); |
| c.get_log_page.csi = csi; |
| |
| return nvme_submit_sync_cmd(ctrl->admin_q, &c, log, size); |
| } |
| |
| static int nvme_get_effects_log(struct nvme_ctrl *ctrl, u8 csi, |
| struct nvme_effects_log **log) |
| { |
| struct nvme_effects_log *cel = xa_load(&ctrl->cels, csi); |
| int ret; |
| |
| if (cel) |
| goto out; |
| |
| cel = kzalloc(sizeof(*cel), GFP_KERNEL); |
| if (!cel) |
| return -ENOMEM; |
| |
| ret = nvme_get_log(ctrl, 0x00, NVME_LOG_CMD_EFFECTS, 0, csi, |
| cel, sizeof(*cel), 0); |
| if (ret) { |
| kfree(cel); |
| return ret; |
| } |
| |
| xa_store(&ctrl->cels, csi, cel, GFP_KERNEL); |
| out: |
| *log = cel; |
| return 0; |
| } |
| |
| /* |
| * Initialize the cached copies of the Identify data and various controller |
| * register in our nvme_ctrl structure. This should be called as soon as |
| * the admin queue is fully up and running. |
| */ |
| int nvme_init_identify(struct nvme_ctrl *ctrl) |
| { |
| struct nvme_id_ctrl *id; |
| int ret, page_shift; |
| u32 max_hw_sectors; |
| bool prev_apst_enabled; |
| |
| ret = ctrl->ops->reg_read32(ctrl, NVME_REG_VS, &ctrl->vs); |
| if (ret) { |
| dev_err(ctrl->device, "Reading VS failed (%d)\n", ret); |
| return ret; |
| } |
| page_shift = NVME_CAP_MPSMIN(ctrl->cap) + 12; |
| ctrl->sqsize = min_t(u16, NVME_CAP_MQES(ctrl->cap), ctrl->sqsize); |
| |
| if (ctrl->vs >= NVME_VS(1, 1, 0)) |
| ctrl->subsystem = NVME_CAP_NSSRC(ctrl->cap); |
| |
| ret = nvme_identify_ctrl(ctrl, &id); |
| if (ret) { |
| dev_err(ctrl->device, "Identify Controller failed (%d)\n", ret); |
| return -EIO; |
| } |
| |
| if (id->lpa & NVME_CTRL_LPA_CMD_EFFECTS_LOG) { |
| ret = nvme_get_effects_log(ctrl, NVME_CSI_NVM, &ctrl->effects); |
| if (ret < 0) |
| goto out_free; |
| } |
| |
| if (!(ctrl->ops->flags & NVME_F_FABRICS)) |
| ctrl->cntlid = le16_to_cpu(id->cntlid); |
| |
| if (!ctrl->identified) { |
| int i; |
| |
| ret = nvme_init_subsystem(ctrl, id); |
| if (ret) |
| goto out_free; |
| |
| /* |
| * Check for quirks. Quirk can depend on firmware version, |
| * so, in principle, the set of quirks present can change |
| * across a reset. As a possible future enhancement, we |
| * could re-scan for quirks every time we reinitialize |
| * the device, but we'd have to make sure that the driver |
| * behaves intelligently if the quirks change. |
| */ |
| for (i = 0; i < ARRAY_SIZE(core_quirks); i++) { |
| if (quirk_matches(id, &core_quirks[i])) |
| ctrl->quirks |= core_quirks[i].quirks; |
| } |
| } |
| |
| if (force_apst && (ctrl->quirks & NVME_QUIRK_NO_DEEPEST_PS)) { |
| dev_warn(ctrl->device, "forcibly allowing all power states due to nvme_core.force_apst -- use at your own risk\n"); |
| ctrl->quirks &= ~NVME_QUIRK_NO_DEEPEST_PS; |
| } |
| |
| ctrl->crdt[0] = le16_to_cpu(id->crdt1); |
| ctrl->crdt[1] = le16_to_cpu(id->crdt2); |
| ctrl->crdt[2] = le16_to_cpu(id->crdt3); |
| |
| ctrl->oacs = le16_to_cpu(id->oacs); |
| ctrl->oncs = le16_to_cpu(id->oncs); |
| ctrl->mtfa = le16_to_cpu(id->mtfa); |
| ctrl->oaes = le32_to_cpu(id->oaes); |
| ctrl->wctemp = le16_to_cpu(id->wctemp); |
| ctrl->cctemp = le16_to_cpu(id->cctemp); |
| |
| atomic_set(&ctrl->abort_limit, id->acl + 1); |
| ctrl->vwc = id->vwc; |
| if (id->mdts) |
| max_hw_sectors = 1 << (id->mdts + page_shift - 9); |
| else |
| max_hw_sectors = UINT_MAX; |
| ctrl->max_hw_sectors = |
| min_not_zero(ctrl->max_hw_sectors, max_hw_sectors); |
| |
| nvme_set_queue_limits(ctrl, ctrl->admin_q); |
| ctrl->sgls = le32_to_cpu(id->sgls); |
| ctrl->kas = le16_to_cpu(id->kas); |
| ctrl->max_namespaces = le32_to_cpu(id->mnan); |
| ctrl->ctratt = le32_to_cpu(id->ctratt); |
| |
| if (id->rtd3e) { |
| /* us -> s */ |
| u32 transition_time = le32_to_cpu(id->rtd3e) / USEC_PER_SEC; |
| |
| ctrl->shutdown_timeout = clamp_t(unsigned int, transition_time, |
| shutdown_timeout, 60); |
| |
| if (ctrl->shutdown_timeout != shutdown_timeout) |
| dev_info(ctrl->device, |
| "Shutdown timeout set to %u seconds\n", |
| ctrl->shutdown_timeout); |
| } else |
| ctrl->shutdown_timeout = shutdown_timeout; |
| |
| ctrl->npss = id->npss; |
| ctrl->apsta = id->apsta; |
| prev_apst_enabled = ctrl->apst_enabled; |
| if (ctrl->quirks & NVME_QUIRK_NO_APST) { |
| if (force_apst && id->apsta) { |
| dev_warn(ctrl->device, "forcibly allowing APST due to nvme_core.force_apst -- use at your own risk\n"); |
| ctrl->apst_enabled = true; |
| } else { |
| ctrl->apst_enabled = false; |
| } |
| } else { |
| ctrl->apst_enabled = id->apsta; |
| } |
| memcpy(ctrl->psd, id->psd, sizeof(ctrl->psd)); |
| |
| if (ctrl->ops->flags & NVME_F_FABRICS) { |
| ctrl->icdoff = le16_to_cpu(id->icdoff); |
| ctrl->ioccsz = le32_to_cpu(id->ioccsz); |
| ctrl->iorcsz = le32_to_cpu(id->iorcsz); |
| ctrl->maxcmd = le16_to_cpu(id->maxcmd); |
| |
| /* |
| * In fabrics we need to verify the cntlid matches the |
| * admin connect |
| */ |
| if (ctrl->cntlid != le16_to_cpu(id->cntlid)) { |
| dev_err(ctrl->device, |
| "Mismatching cntlid: Connect %u vs Identify " |
| "%u, rejecting\n", |
| ctrl->cntlid, le16_to_cpu(id->cntlid)); |
| ret = -EINVAL; |
| goto out_free; |
| } |
| |
| if (!nvme_discovery_ctrl(ctrl) && !ctrl->kas) { |
| dev_err(ctrl->device, |
| "keep-alive support is mandatory for fabrics\n"); |
| ret = -EINVAL; |
| goto out_free; |
| } |
| } else { |
| ctrl->hmpre = le32_to_cpu(id->hmpre); |
| ctrl->hmmin = le32_to_cpu(id->hmmin); |
| ctrl->hmminds = le32_to_cpu(id->hmminds); |
| ctrl->hmmaxd = le16_to_cpu(id->hmmaxd); |
| } |
| |
| ret = nvme_mpath_init(ctrl, id); |
| kfree(id); |
| |
| if (ret < 0) |
| return ret; |
| |
| if (ctrl->apst_enabled && !prev_apst_enabled) |
| dev_pm_qos_expose_latency_tolerance(ctrl->device); |
| else if (!ctrl->apst_enabled && prev_apst_enabled) |
| dev_pm_qos_hide_latency_tolerance(ctrl->device); |
| |
| ret = nvme_configure_apst(ctrl); |
| if (ret < 0) |
| return ret; |
| |
| ret = nvme_configure_timestamp(ctrl); |
| if (ret < 0) |
| return ret; |
| |
| ret = nvme_configure_directives(ctrl); |
| if (ret < 0) |
| return ret; |
| |
| ret = nvme_configure_acre(ctrl); |
| if (ret < 0) |
| return ret; |
| |
| if (!ctrl->identified && !nvme_discovery_ctrl(ctrl)) { |
| ret = nvme_hwmon_init(ctrl); |
| if (ret < 0) |
| return ret; |
| } |
| |
| ctrl->identified = true; |
| |
| return 0; |
| |
| out_free: |
| kfree(id); |
| return ret; |
| } |
| EXPORT_SYMBOL_GPL(nvme_init_identify); |
| |
| static int nvme_dev_open(struct inode *inode, struct file *file) |
| { |
| struct nvme_ctrl *ctrl = |
| container_of(inode->i_cdev, struct nvme_ctrl, cdev); |
| |
| switch (ctrl->state) { |
| case NVME_CTRL_LIVE: |
| break; |
| default: |
| return -EWOULDBLOCK; |
| } |
| |
| nvme_get_ctrl(ctrl); |
| if (!try_module_get(ctrl->ops->module)) { |
| nvme_put_ctrl(ctrl); |
| return -EINVAL; |
| } |
| |
| file->private_data = ctrl; |
| return 0; |
| } |
| |
| static int nvme_dev_release(struct inode *inode, struct file *file) |
| { |
| struct nvme_ctrl *ctrl = |
| container_of(inode->i_cdev, struct nvme_ctrl, cdev); |
| |
| module_put(ctrl->ops->module); |
| nvme_put_ctrl(ctrl); |
| return 0; |
| } |
| |
| static int nvme_dev_user_cmd(struct nvme_ctrl *ctrl, void __user *argp) |
| { |
| struct nvme_ns *ns; |
| int ret; |
| |
| down_read(&ctrl->namespaces_rwsem); |
| if (list_empty(&ctrl->namespaces)) { |
| ret = -ENOTTY; |
| goto out_unlock; |
| } |
| |
| ns = list_first_entry(&ctrl->namespaces, struct nvme_ns, list); |
| if (ns != list_last_entry(&ctrl->namespaces, struct nvme_ns, list)) { |
| dev_warn(ctrl->device, |
| "NVME_IOCTL_IO_CMD not supported when multiple namespaces present!\n"); |
| ret = -EINVAL; |
| goto out_unlock; |
| } |
| |
| dev_warn(ctrl->device, |
| "using deprecated NVME_IOCTL_IO_CMD ioctl on the char device!\n"); |
| kref_get(&ns->kref); |
| up_read(&ctrl->namespaces_rwsem); |
| |
| ret = nvme_user_cmd(ctrl, ns, argp); |
| nvme_put_ns(ns); |
| return ret; |
| |
| out_unlock: |
| up_read(&ctrl->namespaces_rwsem); |
| return ret; |
| } |
| |
| static long nvme_dev_ioctl(struct file *file, unsigned int cmd, |
| unsigned long arg) |
| { |
| struct nvme_ctrl *ctrl = file->private_data; |
| void __user *argp = (void __user *)arg; |
| |
| switch (cmd) { |
| case NVME_IOCTL_ADMIN_CMD: |
| return nvme_user_cmd(ctrl, NULL, argp); |
| case NVME_IOCTL_ADMIN64_CMD: |
| return nvme_user_cmd64(ctrl, NULL, argp); |
| case NVME_IOCTL_IO_CMD: |
| return nvme_dev_user_cmd(ctrl, argp); |
| case NVME_IOCTL_RESET: |
| dev_warn(ctrl->device, "resetting controller\n"); |
| return nvme_reset_ctrl_sync(ctrl); |
| case NVME_IOCTL_SUBSYS_RESET: |
| return nvme_reset_subsystem(ctrl); |
| case NVME_IOCTL_RESCAN: |
| nvme_queue_scan(ctrl); |
| return 0; |
| default: |
| return -ENOTTY; |
| } |
| } |
| |
| static const struct file_operations nvme_dev_fops = { |
| .owner = THIS_MODULE, |
| .open = nvme_dev_open, |
| .release = nvme_dev_release, |
| .unlocked_ioctl = nvme_dev_ioctl, |
| .compat_ioctl = compat_ptr_ioctl, |
| }; |
| |
| static ssize_t nvme_sysfs_reset(struct device *dev, |
| struct device_attribute *attr, const char *buf, |
| size_t count) |
| { |
| struct nvme_ctrl *ctrl = dev_get_drvdata(dev); |
| int ret; |
| |
| ret = nvme_reset_ctrl_sync(ctrl); |
| if (ret < 0) |
| return ret; |
| return count; |
| } |
| static DEVICE_ATTR(reset_controller, S_IWUSR, NULL, nvme_sysfs_reset); |
| |
| static ssize_t nvme_sysfs_rescan(struct device *dev, |
| struct device_attribute *attr, const char *buf, |
| size_t count) |
| { |
| struct nvme_ctrl *ctrl = dev_get_drvdata(dev); |
| |
| nvme_queue_scan(ctrl); |
| return count; |
| } |
| static DEVICE_ATTR(rescan_controller, S_IWUSR, NULL, nvme_sysfs_rescan); |
| |
| static inline struct nvme_ns_head *dev_to_ns_head(struct device *dev) |
| { |
| struct gendisk *disk = dev_to_disk(dev); |
| |
| if (disk->fops == &nvme_bdev_ops) |
| return nvme_get_ns_from_dev(dev)->head; |
| else |
| return disk->private_data; |
| } |
| |
| static ssize_t wwid_show(struct device *dev, struct device_attribute *attr, |
| char *buf) |
| { |
| struct nvme_ns_head *head = dev_to_ns_head(dev); |
| struct nvme_ns_ids *ids = &head->ids; |
| struct nvme_subsystem *subsys = head->subsys; |
| int serial_len = sizeof(subsys->serial); |
| int model_len = sizeof(subsys->model); |
| |
| if (!uuid_is_null(&ids->uuid)) |
| return sprintf(buf, "uuid.%pU\n", &ids->uuid); |
| |
| if (memchr_inv(ids->nguid, 0, sizeof(ids->nguid))) |
| return sprintf(buf, "eui.%16phN\n", ids->nguid); |
| |
| if (memchr_inv(ids->eui64, 0, sizeof(ids->eui64))) |
| return sprintf(buf, "eui.%8phN\n", ids->eui64); |
| |
| while (serial_len > 0 && (subsys->serial[serial_len - 1] == ' ' || |
| subsys->serial[serial_len - 1] == '\0')) |
| serial_len--; |
| while (model_len > 0 && (subsys->model[model_len - 1] == ' ' || |
| subsys->model[model_len - 1] == '\0')) |
| model_len--; |
| |
| return sprintf(buf, "nvme.%04x-%*phN-%*phN-%08x\n", subsys->vendor_id, |
| serial_len, subsys->serial, model_len, subsys->model, |
| head->ns_id); |
| } |
| static DEVICE_ATTR_RO(wwid); |
| |
| static ssize_t nguid_show(struct device *dev, struct device_attribute *attr, |
| char *buf) |
| { |
| return sprintf(buf, "%pU\n", dev_to_ns_head(dev)->ids.nguid); |
| } |
| static DEVICE_ATTR_RO(nguid); |
| |
| static ssize_t uuid_show(struct device *dev, struct device_attribute *attr, |
| char *buf) |
| { |
| struct nvme_ns_ids *ids = &dev_to_ns_head(dev)->ids; |
| |
| /* For backward compatibility expose the NGUID to userspace if |
| * we have no UUID set |
| */ |
| if (uuid_is_null(&ids->uuid)) { |
| printk_ratelimited(KERN_WARNING |
| "No UUID available providing old NGUID\n"); |
| return sprintf(buf, "%pU\n", ids->nguid); |
| } |
| return sprintf(buf, "%pU\n", &ids->uuid); |
| } |
| static DEVICE_ATTR_RO(uuid); |
| |
| static ssize_t eui_show(struct device *dev, struct device_attribute *attr, |
| char *buf) |
| { |
| return sprintf(buf, "%8ph\n", dev_to_ns_head(dev)->ids.eui64); |
| } |
| static DEVICE_ATTR_RO(eui); |
| |
| static ssize_t nsid_show(struct device *dev, struct device_attribute *attr, |
| char *buf) |
| { |
| return sprintf(buf, "%d\n", dev_to_ns_head(dev)->ns_id); |
| } |
| static DEVICE_ATTR_RO(nsid); |
| |
| static struct attribute *nvme_ns_id_attrs[] = { |
| &dev_attr_wwid.attr, |
| &dev_attr_uuid.attr, |
| &dev_attr_nguid.attr, |
| &dev_attr_eui.attr, |
| &dev_attr_nsid.attr, |
| #ifdef CONFIG_NVME_MULTIPATH |
| &dev_attr_ana_grpid.attr, |
| &dev_attr_ana_state.attr, |
| #endif |
| NULL, |
| }; |
| |
| static umode_t nvme_ns_id_attrs_are_visible(struct kobject *kobj, |
| struct attribute *a, int n) |
| { |
| struct device *dev = container_of(kobj, struct device, kobj); |
| struct nvme_ns_ids *ids = &dev_to_ns_head(dev)->ids; |
| |
| if (a == &dev_attr_uuid.attr) { |
| if (uuid_is_null(&ids->uuid) && |
| !memchr_inv(ids->nguid, 0, sizeof(ids->nguid))) |
| return 0; |
| } |
| if (a == &dev_attr_nguid.attr) { |
| if (!memchr_inv(ids->nguid, 0, sizeof(ids->nguid))) |
| return 0; |
| } |
| if (a == &dev_attr_eui.attr) { |
| if (!memchr_inv(ids->eui64, 0, sizeof(ids->eui64))) |
| return 0; |
| } |
| #ifdef CONFIG_NVME_MULTIPATH |
| if (a == &dev_attr_ana_grpid.attr || a == &dev_attr_ana_state.attr) { |
| if (dev_to_disk(dev)->fops != &nvme_bdev_ops) /* per-path attr */ |
| return 0; |
| if (!nvme_ctrl_use_ana(nvme_get_ns_from_dev(dev)->ctrl)) |
| return 0; |
| } |
| #endif |
| return a->mode; |
| } |
| |
| static const struct attribute_group nvme_ns_id_attr_group = { |
| .attrs = nvme_ns_id_attrs, |
| .is_visible = nvme_ns_id_attrs_are_visible, |
| }; |
| |
| const struct attribute_group *nvme_ns_id_attr_groups[] = { |
| &nvme_ns_id_attr_group, |
| #ifdef CONFIG_NVM |
| &nvme_nvm_attr_group, |
| #endif |
| NULL, |
| }; |
| |
| #define nvme_show_str_function(field) \ |
| static ssize_t field##_show(struct device *dev, \ |
| struct device_attribute *attr, char *buf) \ |
| { \ |
| struct nvme_ctrl *ctrl = dev_get_drvdata(dev); \ |
| return sprintf(buf, "%.*s\n", \ |
| (int)sizeof(ctrl->subsys->field), ctrl->subsys->field); \ |
| } \ |
| static DEVICE_ATTR(field, S_IRUGO, field##_show, NULL); |
| |
| nvme_show_str_function(model); |
| nvme_show_str_function(serial); |
| nvme_show_str_function(firmware_rev); |
| |
| #define nvme_show_int_function(field) \ |
| static ssize_t field##_show(struct device *dev, \ |
| struct device_attribute *attr, char *buf) \ |
| { \ |
| struct nvme_ctrl *ctrl = dev_get_drvdata(dev); \ |
| return sprintf(buf, "%d\n", ctrl->field); \ |
| } \ |
| static DEVICE_ATTR(field, S_IRUGO, field##_show, NULL); |
| |
| nvme_show_int_function(cntlid); |
| nvme_show_int_function(numa_node); |
| nvme_show_int_function(queue_count); |
| nvme_show_int_function(sqsize); |
| |
| static ssize_t nvme_sysfs_delete(struct device *dev, |
| struct device_attribute *attr, const char *buf, |
| size_t count) |
| { |
| struct nvme_ctrl *ctrl = dev_get_drvdata(dev); |
| |
| if (device_remove_file_self(dev, attr)) |
| nvme_delete_ctrl_sync(ctrl); |
| return count; |
| } |
| static DEVICE_ATTR(delete_controller, S_IWUSR, NULL, nvme_sysfs_delete); |
| |
| static ssize_t nvme_sysfs_show_transport(struct device *dev, |
| struct device_attribute *attr, |
| char *buf) |
| { |
| struct nvme_ctrl *ctrl = dev_get_drvdata(dev); |
| |
| return snprintf(buf, PAGE_SIZE, "%s\n", ctrl->ops->name); |
| } |
| static DEVICE_ATTR(transport, S_IRUGO, nvme_sysfs_show_transport, NULL); |
| |
| static ssize_t nvme_sysfs_show_state(struct device *dev, |
| struct device_attribute *attr, |
| char *buf) |
| { |
| struct nvme_ctrl *ctrl = dev_get_drvdata(dev); |
| static const char *const state_name[] = { |
| [NVME_CTRL_NEW] = "new", |
| [NVME_CTRL_LIVE] = "live", |
| [NVME_CTRL_RESETTING] = "resetting", |
| [NVME_CTRL_CONNECTING] = "connecting", |
| [NVME_CTRL_DELETING] = "deleting", |
| [NVME_CTRL_DELETING_NOIO]= "deleting (no IO)", |
| [NVME_CTRL_DEAD] = "dead", |
| }; |
| |
| if ((unsigned)ctrl->state < ARRAY_SIZE(state_name) && |
| state_name[ctrl->state]) |
| return sprintf(buf, "%s\n", state_name[ctrl->state]); |
| |
| return sprintf(buf, "unknown state\n"); |
| } |
| |
| static DEVICE_ATTR(state, S_IRUGO, nvme_sysfs_show_state, NULL); |
| |
| static ssize_t nvme_sysfs_show_subsysnqn(struct device *dev, |
| struct device_attribute *attr, |
| char *buf) |
| { |
| struct nvme_ctrl *ctrl = dev_get_drvdata(dev); |
| |
| return snprintf(buf, PAGE_SIZE, "%s\n", ctrl->subsys->subnqn); |
| } |
| static DEVICE_ATTR(subsysnqn, S_IRUGO, nvme_sysfs_show_subsysnqn, NULL); |
| |
| static ssize_t nvme_sysfs_show_hostnqn(struct device *dev, |
| struct device_attribute *attr, |
| char *buf) |
| { |
| struct nvme_ctrl *ctrl = dev_get_drvdata(dev); |
| |
| return snprintf(buf, PAGE_SIZE, "%s\n", ctrl->opts->host->nqn); |
| } |
| static DEVICE_ATTR(hostnqn, S_IRUGO, nvme_sysfs_show_hostnqn, NULL); |
| |
| static ssize_t nvme_sysfs_show_hostid(struct device *dev, |
| struct device_attribute *attr, |
| char *buf) |
| { |
| struct nvme_ctrl *ctrl = dev_get_drvdata(dev); |
| |
| return snprintf(buf, PAGE_SIZE, "%pU\n", &ctrl->opts->host->id); |
| } |
| static DEVICE_ATTR(hostid, S_IRUGO, nvme_sysfs_show_hostid, NULL); |
| |
| static ssize_t nvme_sysfs_show_address(struct device *dev, |
| struct device_attribute *attr, |
| char *buf) |
| { |
| struct nvme_ctrl *ctrl = dev_get_drvdata(dev); |
| |
| return ctrl->ops->get_address(ctrl, buf, PAGE_SIZE); |
| } |
| static DEVICE_ATTR(address, S_IRUGO, nvme_sysfs_show_address, NULL); |
| |
| static ssize_t nvme_ctrl_loss_tmo_show(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct nvme_ctrl *ctrl = dev_get_drvdata(dev); |
| struct nvmf_ctrl_options *opts = ctrl->opts; |
| |
| if (ctrl->opts->max_reconnects == -1) |
| return sprintf(buf, "off\n"); |
| return sprintf(buf, "%d\n", |
| opts->max_reconnects * opts->reconnect_delay); |
| } |
| |
| static ssize_t nvme_ctrl_loss_tmo_store(struct device *dev, |
| struct device_attribute *attr, const char *buf, size_t count) |
| { |
| struct nvme_ctrl *ctrl = dev_get_drvdata(dev); |
| struct nvmf_ctrl_options *opts = ctrl->opts; |
| int ctrl_loss_tmo, err; |
| |
| err = kstrtoint(buf, 10, &ctrl_loss_tmo); |
| if (err) |
| return -EINVAL; |
| |
| else if (ctrl_loss_tmo < 0) |
| opts->max_reconnects = -1; |
| else |
| opts->max_reconnects = DIV_ROUND_UP(ctrl_loss_tmo, |
| opts->reconnect_delay); |
| return count; |
| } |
| static DEVICE_ATTR(ctrl_loss_tmo, S_IRUGO | S_IWUSR, |
| nvme_ctrl_loss_tmo_show, nvme_ctrl_loss_tmo_store); |
| |
| static ssize_t nvme_ctrl_reconnect_delay_show(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct nvme_ctrl *ctrl = dev_get_drvdata(dev); |
| |
| if (ctrl->opts->reconnect_delay == -1) |
| return sprintf(buf, "off\n"); |
| return sprintf(buf, "%d\n", ctrl->opts->reconnect_delay); |
| } |
| |
| static ssize_t nvme_ctrl_reconnect_delay_store(struct device *dev, |
| struct device_attribute *attr, const char *buf, size_t count) |
| { |
| struct nvme_ctrl *ctrl = dev_get_drvdata(dev); |
| unsigned int v; |
| int err; |
| |
| err = kstrtou32(buf, 10, &v); |
| if (err) |
| return err; |
| |
| ctrl->opts->reconnect_delay = v; |
| return count; |
| } |
| static DEVICE_ATTR(reconnect_delay, S_IRUGO | S_IWUSR, |
| nvme_ctrl_reconnect_delay_show, nvme_ctrl_reconnect_delay_store); |
| |
| static struct attribute *nvme_dev_attrs[] = { |
| &dev_attr_reset_controller.attr, |
| &dev_attr_rescan_controller.attr, |
| &dev_attr_model.attr, |
| &dev_attr_serial.attr, |
| &dev_attr_firmware_rev.attr, |
| &dev_attr_cntlid.attr, |
| &dev_attr_delete_controller.attr, |
| &dev_attr_transport.attr, |
| &dev_attr_subsysnqn.attr, |
| &dev_attr_address.attr, |
| &dev_attr_state.attr, |
| &dev_attr_numa_node.attr, |
| &dev_attr_queue_count.attr, |
| &dev_attr_sqsize.attr, |
| &dev_attr_hostnqn.attr, |
| &dev_attr_hostid.attr, |
| &dev_attr_ctrl_loss_tmo.attr, |
| &dev_attr_reconnect_delay.attr, |
| NULL |
| }; |
| |
| static umode_t nvme_dev_attrs_are_visible(struct kobject *kobj, |
| struct attribute *a, int n) |
| { |
| struct device *dev = container_of(kobj, struct device, kobj); |
| struct nvme_ctrl *ctrl = dev_get_drvdata(dev); |
| |
| if (a == &dev_attr_delete_controller.attr && !ctrl->ops->delete_ctrl) |
| return 0; |
| if (a == &dev_attr_address.attr && !ctrl->ops->get_address) |
| return 0; |
| if (a == &dev_attr_hostnqn.attr && !ctrl->opts) |
| return 0; |
| if (a == &dev_attr_hostid.attr && !ctrl->opts) |
| return 0; |
| if (a == &dev_attr_ctrl_loss_tmo.attr && !ctrl->opts) |
| return 0; |
| if (a == &dev_attr_reconnect_delay.attr && !ctrl->opts) |
| return 0; |
| |
| return a->mode; |
| } |
| |
| static struct attribute_group nvme_dev_attrs_group = { |
| .attrs = nvme_dev_attrs, |
| .is_visible = nvme_dev_attrs_are_visible, |
| }; |
| |
| static const struct attribute_group *nvme_dev_attr_groups[] = { |
| &nvme_dev_attrs_group, |
| NULL, |
| }; |
| |
| static struct nvme_ns_head *nvme_find_ns_head(struct nvme_subsystem *subsys, |
| unsigned nsid) |
| { |
| struct nvme_ns_head *h; |
| |
| lockdep_assert_held(&subsys->lock); |
| |
| list_for_each_entry(h, &subsys->nsheads, entry) { |
| if (h->ns_id == nsid && kref_get_unless_zero(&h->ref)) |
| return h; |
| } |
| |
| return NULL; |
| } |
| |
| static int __nvme_check_ids(struct nvme_subsystem *subsys, |
| struct nvme_ns_head *new) |
| { |
| struct nvme_ns_head *h; |
| |
| lockdep_assert_held(&subsys->lock); |
| |
| list_for_each_entry(h, &subsys->nsheads, entry) { |
| if (nvme_ns_ids_valid(&new->ids) && |
| nvme_ns_ids_equal(&new->ids, &h->ids)) |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| static struct nvme_ns_head *nvme_alloc_ns_head(struct nvme_ctrl *ctrl, |
| unsigned nsid, struct nvme_ns_ids *ids) |
| { |
| struct nvme_ns_head *head; |
| size_t size = sizeof(*head); |
| int ret = -ENOMEM; |
| |
| #ifdef CONFIG_NVME_MULTIPATH |
| size += num_possible_nodes() * sizeof(struct nvme_ns *); |
| #endif |
| |
| head = kzalloc(size, GFP_KERNEL); |
| if (!head) |
| goto out; |
| ret = ida_simple_get(&ctrl->subsys->ns_ida, 1, 0, GFP_KERNEL); |
| if (ret < 0) |
| goto out_free_head; |
| head->instance = ret; |
| INIT_LIST_HEAD(&head->list); |
| ret = init_srcu_struct(&head->srcu); |
| if (ret) |
| goto out_ida_remove; |
| head->subsys = ctrl->subsys; |
| head->ns_id = nsid; |
| head->ids = *ids; |
| kref_init(&head->ref); |
| |
| ret = __nvme_check_ids(ctrl->subsys, head); |
| if (ret) { |
| dev_err(ctrl->device, |
| "duplicate IDs for nsid %d\n", nsid); |
| goto out_cleanup_srcu; |
| } |
| |
| if (head->ids.csi) { |
| ret = nvme_get_effects_log(ctrl, head->ids.csi, &head->effects); |
| if (ret) |
| goto out_cleanup_srcu; |
| } else |
| head->effects = ctrl->effects; |
| |
| ret = nvme_mpath_alloc_disk(ctrl, head); |
| if (ret) |
| goto out_cleanup_srcu; |
| |
| list_add_tail(&head->entry, &ctrl->subsys->nsheads); |
| |
| kref_get(&ctrl->subsys->ref); |
| |
| return head; |
| out_cleanup_srcu: |
| cleanup_srcu_struct(&head->srcu); |
| out_ida_remove: |
| ida_simple_remove(&ctrl->subsys->ns_ida, head->instance); |
| out_free_head: |
| kfree(head); |
| out: |
| if (ret > 0) |
| ret = blk_status_to_errno(nvme_error_status(ret)); |
| return ERR_PTR(ret); |
| } |
| |
| static int nvme_init_ns_head(struct nvme_ns *ns, unsigned nsid, |
| struct nvme_ns_ids *ids, bool is_shared) |
| { |
| struct nvme_ctrl *ctrl = ns->ctrl; |
| struct nvme_ns_head *head = NULL; |
| int ret = 0; |
| |
| mutex_lock(&ctrl->subsys->lock); |
| head = nvme_find_ns_head(ctrl->subsys, nsid); |
| if (!head) { |
| head = nvme_alloc_ns_head(ctrl, nsid, ids); |
| if (IS_ERR(head)) { |
| ret = PTR_ERR(head); |
| goto out_unlock; |
| } |
| head->shared = is_shared; |
| } else { |
| ret = -EINVAL; |
| if (!is_shared || !head->shared) { |
| dev_err(ctrl->device, |
| "Duplicate unshared namespace %d\n", nsid); |
| goto out_put_ns_head; |
| } |
| if (!nvme_ns_ids_equal(&head->ids, ids)) { |
| dev_err(ctrl->device, |
| "IDs don't match for shared namespace %d\n", |
| nsid); |
| goto out_put_ns_head; |
| } |
| } |
| |
| list_add_tail(&ns->siblings, &head->list); |
| ns->head = head; |
| mutex_unlock(&ctrl->subsys->lock); |
| return 0; |
| |
| out_put_ns_head: |
| nvme_put_ns_head(head); |
| out_unlock: |
| mutex_unlock(&ctrl->subsys->lock); |
| return ret; |
| } |
| |
| static int ns_cmp(void *priv, struct list_head *a, struct list_head *b) |
| { |
| struct nvme_ns *nsa = container_of(a, struct nvme_ns, list); |
| struct nvme_ns *nsb = container_of(b, struct nvme_ns, list); |
| |
| return nsa->head->ns_id - nsb->head->ns_id; |
| } |
| |
| struct nvme_ns *nvme_find_get_ns(struct nvme_ctrl *ctrl, unsigned nsid) |
| { |
| struct nvme_ns *ns, *ret = NULL; |
| |
| down_read(&ctrl->namespaces_rwsem); |
| list_for_each_entry(ns, &ctrl->namespaces, list) { |
| if (ns->head->ns_id == nsid) { |
| if (!kref_get_unless_zero(&ns->kref)) |
| continue; |
| ret = ns; |
| break; |
| } |
| if (ns->head->ns_id > nsid) |
| break; |
| } |
| up_read(&ctrl->namespaces_rwsem); |
| return ret; |
| } |
| EXPORT_SYMBOL_NS_GPL(nvme_find_get_ns, NVME_TARGET_PASSTHRU); |
| |
| static void nvme_alloc_ns(struct nvme_ctrl *ctrl, unsigned nsid, |
| struct nvme_ns_ids *ids) |
| { |
| struct nvme_ns *ns; |
| struct gendisk *disk; |
| struct nvme_id_ns *id; |
| char disk_name[DISK_NAME_LEN]; |
| int node = ctrl->numa_node, flags = GENHD_FL_EXT_DEVT; |
| |
| if (nvme_identify_ns(ctrl, nsid, ids, &id)) |
| return; |
| |
| ns = kzalloc_node(sizeof(*ns), GFP_KERNEL, node); |
| if (!ns) |
| goto out_free_id; |
| |
| ns->queue = blk_mq_init_queue(ctrl->tagset); |
| if (IS_ERR(ns->queue)) |
| goto out_free_ns; |
| |
| if (ctrl->opts && ctrl->opts->data_digest) |
| blk_queue_flag_set(QUEUE_FLAG_STABLE_WRITES, ns->queue); |
| |
| blk_queue_flag_set(QUEUE_FLAG_NONROT, ns->queue); |
| if (ctrl->ops->flags & NVME_F_PCI_P2PDMA) |
| blk_queue_flag_set(QUEUE_FLAG_PCI_P2PDMA, ns->queue); |
| |
| ns->queue->queuedata = ns; |
| ns->ctrl = ctrl; |
| kref_init(&ns->kref); |
| |
| if (nvme_init_ns_head(ns, nsid, ids, id->nmic & NVME_NS_NMIC_SHARED)) |
| goto out_free_queue; |
| nvme_set_disk_name(disk_name, ns, ctrl, &flags); |
| |
| disk = alloc_disk_node(0, node); |
| if (!disk) |
| goto out_unlink_ns; |
| |
| disk->fops = &nvme_bdev_ops; |
| disk->private_data = ns; |
| disk->queue = ns->queue; |
| disk->flags = flags; |
| memcpy(disk->disk_name, disk_name, DISK_NAME_LEN); |
| ns->disk = disk; |
| |
| if (nvme_update_ns_info(ns, id)) |
| goto out_put_disk; |
| |
| if ((ctrl->quirks & NVME_QUIRK_LIGHTNVM) && id->vs[0] == 0x1) { |
| if (nvme_nvm_register(ns, disk_name, node)) { |
| dev_warn(ctrl->device, "LightNVM init failure\n"); |
| goto out_put_disk; |
| } |
| } |
| |
| down_write(&ctrl->namespaces_rwsem); |
| list_add_tail(&ns->list, &ctrl->namespaces); |
| up_write(&ctrl->namespaces_rwsem); |
| |
| nvme_get_ctrl(ctrl); |
| |
| device_add_disk(ctrl->device, ns->disk, nvme_ns_id_attr_groups); |
| |
| nvme_mpath_add_disk(ns, id); |
| nvme_fault_inject_init(&ns->fault_inject, ns->disk->disk_name); |
| kfree(id); |
| |
| return; |
| out_put_disk: |
| /* prevent double queue cleanup */ |
| ns->disk->queue = NULL; |
| put_disk(ns->disk); |
| out_unlink_ns: |
| mutex_lock(&ctrl->subsys->lock); |
| list_del_rcu(&ns->siblings); |
| if (list_empty(&ns->head->list)) |
| list_del_init(&ns->head->entry); |
| mutex_unlock(&ctrl->subsys->lock); |
| nvme_put_ns_head(ns->head); |
| out_free_queue: |
| blk_cleanup_queue(ns->queue); |
| out_free_ns: |
| kfree(ns); |
| out_free_id: |
| kfree(id); |
| } |
| |
| static void nvme_ns_remove(struct nvme_ns *ns) |
| { |
| if (test_and_set_bit(NVME_NS_REMOVING, &ns->flags)) |
| return; |
| |
| set_capacity(ns->disk, 0); |
| nvme_fault_inject_fini(&ns->fault_inject); |
| |
| mutex_lock(&ns->ctrl->subsys->lock); |
| list_del_rcu(&ns->siblings); |
| if (list_empty(&ns->head->list)) |
| list_del_init(&ns->head->entry); |
| mutex_unlock(&ns->ctrl->subsys->lock); |
| |
| synchronize_rcu(); /* guarantee not available in head->list */ |
| nvme_mpath_clear_current_path(ns); |
| synchronize_srcu(&ns->head->srcu); /* wait for concurrent submissions */ |
| |
| if (ns->disk->flags & GENHD_FL_UP) { |
| del_gendisk(ns->disk); |
| blk_cleanup_queue(ns->queue); |
| if (blk_get_integrity(ns->disk)) |
| blk_integrity_unregister(ns->disk); |
| } |
| |
| down_write(&ns->ctrl->namespaces_rwsem); |
| list_del_init(&ns->list); |
| up_write(&ns->ctrl->namespaces_rwsem); |
| |
| nvme_mpath_check_last_path(ns); |
| nvme_put_ns(ns); |
| } |
| |
| static void nvme_ns_remove_by_nsid(struct nvme_ctrl *ctrl, u32 nsid) |
| { |
| struct nvme_ns *ns = nvme_find_get_ns(ctrl, nsid); |
| |
| if (ns) { |
| nvme_ns_remove(ns); |
| nvme_put_ns(ns); |
| } |
| } |
| |
| static void nvme_validate_ns(struct nvme_ns *ns, struct nvme_ns_ids *ids) |
| { |
| struct nvme_id_ns *id; |
| int ret = -ENODEV; |
| |
| if (test_bit(NVME_NS_DEAD, &ns->flags)) |
| goto out; |
| |
| ret = nvme_identify_ns(ns->ctrl, ns->head->ns_id, ids, &id); |
| if (ret) |
| goto out; |
| |
| ret = -ENODEV; |
| if (!nvme_ns_ids_equal(&ns->head->ids, ids)) { |
| dev_err(ns->ctrl->device, |
| "identifiers changed for nsid %d\n", ns->head->ns_id); |
| goto out_free_id; |
| } |
| |
| ret = nvme_update_ns_info(ns, id); |
| |
| out_free_id: |
| kfree(id); |
| out: |
| /* |
| * Only remove the namespace if we got a fatal error back from the |
| * device, otherwise ignore the error and just move on. |
| * |
| * TODO: we should probably schedule a delayed retry here. |
| */ |
| if (ret && ret != -ENOMEM && !(ret > 0 && !(ret & NVME_SC_DNR))) |
| nvme_ns_remove(ns); |
| } |
| |
| static void nvme_validate_or_alloc_ns(struct nvme_ctrl *ctrl, unsigned nsid) |
| { |
| struct nvme_ns_ids ids = { }; |
| struct nvme_ns *ns; |
| |
| if (nvme_identify_ns_descs(ctrl, nsid, &ids)) |
| return; |
| |
| ns = nvme_find_get_ns(ctrl, nsid); |
| if (ns) { |
| nvme_validate_ns(ns, &ids); |
| nvme_put_ns(ns); |
| return; |
| } |
| |
| switch (ids.csi) { |
| case NVME_CSI_NVM: |
| nvme_alloc_ns(ctrl, nsid, &ids); |
| break; |
| case NVME_CSI_ZNS: |
| if (!IS_ENABLED(CONFIG_BLK_DEV_ZONED)) { |
| dev_warn(ctrl->device, |
| "nsid %u not supported without CONFIG_BLK_DEV_ZONED\n", |
| nsid); |
| break; |
| } |
| nvme_alloc_ns(ctrl, nsid, &ids); |
| break; |
| default: |
| dev_warn(ctrl->device, "unknown csi %u for nsid %u\n", |
| ids.csi, nsid); |
| break; |
| } |
| } |
| |
| static void nvme_remove_invalid_namespaces(struct nvme_ctrl *ctrl, |
| unsigned nsid) |
| { |
| struct nvme_ns *ns, *next; |
| LIST_HEAD(rm_list); |
| |
| down_write(&ctrl->namespaces_rwsem); |
| list_for_each_entry_safe(ns, next, &ctrl->namespaces, list) { |
| if (ns->head->ns_id > nsid || test_bit(NVME_NS_DEAD, &ns->flags)) |
| list_move_tail(&ns->list, &rm_list); |
| } |
| up_write(&ctrl->namespaces_rwsem); |
| |
| list_for_each_entry_safe(ns, next, &rm_list, list) |
| nvme_ns_remove(ns); |
| |
| } |
| |
| static int nvme_scan_ns_list(struct nvme_ctrl *ctrl) |
| { |
| const int nr_entries = NVME_IDENTIFY_DATA_SIZE / sizeof(__le32); |
| __le32 *ns_list; |
| u32 prev = 0; |
| int ret = 0, i; |
| |
| if (nvme_ctrl_limited_cns(ctrl)) |
| return -EOPNOTSUPP; |
| |
| ns_list = kzalloc(NVME_IDENTIFY_DATA_SIZE, GFP_KERNEL); |
| if (!ns_list) |
| return -ENOMEM; |
| |
| for (;;) { |
| struct nvme_command cmd = { |
| .identify.opcode = nvme_admin_identify, |
| .identify.cns = NVME_ID_CNS_NS_ACTIVE_LIST, |
| .identify.nsid = cpu_to_le32(prev), |
| }; |
| |
| ret = nvme_submit_sync_cmd(ctrl->admin_q, &cmd, ns_list, |
| NVME_IDENTIFY_DATA_SIZE); |
| if (ret) { |
| dev_warn(ctrl->device, |
| "Identify NS List failed (status=0x%x)\n", ret); |
| goto free; |
| } |
| |
| for (i = 0; i < nr_entries; i++) { |
| u32 nsid = le32_to_cpu(ns_list[i]); |
| |
| if (!nsid) /* end of the list? */ |
| goto out; |
| nvme_validate_or_alloc_ns(ctrl, nsid); |
| while (++prev < nsid) |
| nvme_ns_remove_by_nsid(ctrl, prev); |
| } |
| } |
| out: |
| nvme_remove_invalid_namespaces(ctrl, prev); |
| free: |
| kfree(ns_list); |
| return ret; |
| } |
| |
| static void nvme_scan_ns_sequential(struct nvme_ctrl *ctrl) |
| { |
| struct nvme_id_ctrl *id; |
| u32 nn, i; |
| |
| if (nvme_identify_ctrl(ctrl, &id)) |
| return; |
| nn = le32_to_cpu(id->nn); |
| kfree(id); |
| |
| for (i = 1; i <= nn; i++) |
| nvme_validate_or_alloc_ns(ctrl, i); |
| |
| nvme_remove_invalid_namespaces(ctrl, nn); |
| } |
| |
| static void nvme_clear_changed_ns_log(struct nvme_ctrl *ctrl) |
| { |
| size_t log_size = NVME_MAX_CHANGED_NAMESPACES * sizeof(__le32); |
| __le32 *log; |
| int error; |
| |
| log = kzalloc(log_size, GFP_KERNEL); |
| if (!log) |
| return; |
| |
| /* |
| * We need to read the log to clear the AEN, but we don't want to rely |
| * on it for the changed namespace information as userspace could have |
| * raced with us in reading the log page, which could cause us to miss |
| * updates. |
| */ |
| error = nvme_get_log(ctrl, NVME_NSID_ALL, NVME_LOG_CHANGED_NS, 0, |
| NVME_CSI_NVM, log, log_size, 0); |
| if (error) |
| dev_warn(ctrl->device, |
| "reading changed ns log failed: %d\n", error); |
| |
| kfree(log); |
| } |
| |
| static void nvme_scan_work(struct work_struct *work) |
| { |
| struct nvme_ctrl *ctrl = |
| container_of(work, struct nvme_ctrl, scan_work); |
| |
| /* No tagset on a live ctrl means IO queues could not created */ |
| if (ctrl->state != NVME_CTRL_LIVE || !ctrl->tagset) |
| return; |
| |
| if (test_and_clear_bit(NVME_AER_NOTICE_NS_CHANGED, &ctrl->events)) { |
| dev_info(ctrl->device, "rescanning namespaces.\n"); |
| nvme_clear_changed_ns_log(ctrl); |
| } |
| |
| mutex_lock(&ctrl->scan_lock); |
| if (nvme_scan_ns_list(ctrl) != 0) |
| nvme_scan_ns_sequential(ctrl); |
| mutex_unlock(&ctrl->scan_lock); |
| |
| down_write(&ctrl->namespaces_rwsem); |
| list_sort(NULL, &ctrl->namespaces, ns_cmp); |
| up_write(&ctrl->namespaces_rwsem); |
| } |
| |
| /* |
| * This function iterates the namespace list unlocked to allow recovery from |
| * controller failure. It is up to the caller to ensure the namespace list is |
| * not modified by scan work while this function is executing. |
| */ |
| void nvme_remove_namespaces(struct nvme_ctrl *ctrl) |
| { |
| struct nvme_ns *ns, *next; |
| LIST_HEAD(ns_list); |
| |
| /* |
| * make sure to requeue I/O to all namespaces as these |
| * might result from the scan itself and must complete |
| * for the scan_work to make progress |
| */ |
| nvme_mpath_clear_ctrl_paths(ctrl); |
| |
| /* prevent racing with ns scanning */ |
| flush_work(&ctrl->scan_work); |
| |
| /* |
| * The dead states indicates the controller was not gracefully |
| * disconnected. In that case, we won't be able to flush any data while |
| * removing the namespaces' disks; fail all the queues now to avoid |
| * potentially having to clean up the failed sync later. |
| */ |
| if (ctrl->state == NVME_CTRL_DEAD) |
| nvme_kill_queues(ctrl); |
| |
| /* this is a no-op when called from the controller reset handler */ |
| nvme_change_ctrl_state(ctrl, NVME_CTRL_DELETING_NOIO); |
| |
| down_write(&ctrl->namespaces_rwsem); |
| list_splice_init(&ctrl->namespaces, &ns_list); |
| up_write(&ctrl->namespaces_rwsem); |
| |
| list_for_each_entry_safe(ns, next, &ns_list, list) |
| nvme_ns_remove(ns); |
| } |
| EXPORT_SYMBOL_GPL(nvme_remove_namespaces); |
| |
| static int nvme_class_uevent(struct device *dev, struct kobj_uevent_env *env) |
| { |
| struct nvme_ctrl *ctrl = |
| container_of(dev, struct nvme_ctrl, ctrl_device); |
| struct nvmf_ctrl_options *opts = ctrl->opts; |
| int ret; |
| |
| ret = add_uevent_var(env, "NVME_TRTYPE=%s", ctrl->ops->name); |
| if (ret) |
| return ret; |
| |
| if (opts) { |
| ret = add_uevent_var(env, "NVME_TRADDR=%s", opts->traddr); |
| if (ret) |
| return ret; |
| |
| ret = add_uevent_var(env, "NVME_TRSVCID=%s", |
| opts->trsvcid ?: "none"); |
| if (ret) |
| return ret; |
| |
| ret = add_uevent_var(env, "NVME_HOST_TRADDR=%s", |
| opts->host_traddr ?: "none"); |
| } |
| return ret; |
| } |
| |
| static void nvme_aen_uevent(struct nvme_ctrl *ctrl) |
| { |
| char *envp[2] = { NULL, NULL }; |
| u32 aen_result = ctrl->aen_result; |
| |
| ctrl->aen_result = 0; |
| if (!aen_result) |
| return; |
| |
| envp[0] = kasprintf(GFP_KERNEL, "NVME_AEN=%#08x", aen_result); |
| if (!envp[0]) |
| return; |
| kobject_uevent_env(&ctrl->device->kobj, KOBJ_CHANGE, envp); |
| kfree(envp[0]); |
| } |
| |
| static void nvme_async_event_work(struct work_struct *work) |
| { |
| struct nvme_ctrl *ctrl = |
| container_of(work, struct nvme_ctrl, async_event_work); |
| |
| nvme_aen_uevent(ctrl); |
| ctrl->ops->submit_async_event(ctrl); |
| } |
| |
| static bool nvme_ctrl_pp_status(struct nvme_ctrl *ctrl) |
| { |
| |
| u32 csts; |
| |
| if (ctrl->ops->reg_read32(ctrl, NVME_REG_CSTS, &csts)) |
| return false; |
| |
| if (csts == ~0) |
| return false; |
| |
| return ((ctrl->ctrl_config & NVME_CC_ENABLE) && (csts & NVME_CSTS_PP)); |
| } |
| |
| static void nvme_get_fw_slot_info(struct nvme_ctrl *ctrl) |
| { |
| struct nvme_fw_slot_info_log *log; |
| |
| log = kmalloc(sizeof(*log), GFP_KERNEL); |
| if (!log) |
| return; |
| |
| if (nvme_get_log(ctrl, NVME_NSID_ALL, NVME_LOG_FW_SLOT, 0, NVME_CSI_NVM, |
| log, sizeof(*log), 0)) |
| dev_warn(ctrl->device, "Get FW SLOT INFO log error\n"); |
| kfree(log); |
| } |
| |
| static void nvme_fw_act_work(struct work_struct *work) |
| { |
| struct nvme_ctrl *ctrl = container_of(work, |
| struct nvme_ctrl, fw_act_work); |
| unsigned long fw_act_timeout; |
| |
| if (ctrl->mtfa) |
| fw_act_timeout = jiffies + |
| msecs_to_jiffies(ctrl->mtfa * 100); |
| else |
| fw_act_timeout = jiffies + |
| msecs_to_jiffies(admin_timeout * 1000); |
| |
| nvme_stop_queues(ctrl); |
| while (nvme_ctrl_pp_status(ctrl)) { |
| if (time_after(jiffies, fw_act_timeout)) { |
| dev_warn(ctrl->device, |
| "Fw activation timeout, reset controller\n"); |
| nvme_try_sched_reset(ctrl); |
| return; |
| } |
| msleep(100); |
| } |
| |
| if (!nvme_change_ctrl_state(ctrl, NVME_CTRL_LIVE)) |
| return; |
| |
| nvme_start_queues(ctrl); |
| /* read FW slot information to clear the AER */ |
| nvme_get_fw_slot_info(ctrl); |
| } |
| |
| static void nvme_handle_aen_notice(struct nvme_ctrl *ctrl, u32 result) |
| { |
| u32 aer_notice_type = (result & 0xff00) >> 8; |
| |
| trace_nvme_async_event(ctrl, aer_notice_type); |
| |
| switch (aer_notice_type) { |
| case NVME_AER_NOTICE_NS_CHANGED: |
| set_bit(NVME_AER_NOTICE_NS_CHANGED, &ctrl->events); |
| nvme_queue_scan(ctrl); |
| break; |
| case NVME_AER_NOTICE_FW_ACT_STARTING: |
| /* |
| * We are (ab)using the RESETTING state to prevent subsequent |
| * recovery actions from interfering with the controller's |
| * firmware activation. |
| */ |
| if (nvme_change_ctrl_state(ctrl, NVME_CTRL_RESETTING)) |
| queue_work(nvme_wq, &ctrl->fw_act_work); |
| break; |
| #ifdef CONFIG_NVME_MULTIPATH |
| case NVME_AER_NOTICE_ANA: |
| if (!ctrl->ana_log_buf) |
| break; |
| queue_work(nvme_wq, &ctrl->ana_work); |
| break; |
| #endif |
| case NVME_AER_NOTICE_DISC_CHANGED: |
| ctrl->aen_result = result; |
| break; |
| default: |
| dev_warn(ctrl->device, "async event result %08x\n", result); |
| } |
| } |
| |
| void nvme_complete_async_event(struct nvme_ctrl *ctrl, __le16 status, |
| volatile union nvme_result *res) |
| { |
| u32 result = le32_to_cpu(res->u32); |
| u32 aer_type = result & 0x07; |
| |
| if (le16_to_cpu(status) >> 1 != NVME_SC_SUCCESS) |
| return; |
| |
| switch (aer_type) { |
| case NVME_AER_NOTICE: |
| nvme_handle_aen_notice(ctrl, result); |
| break; |
| case NVME_AER_ERROR: |
| case NVME_AER_SMART: |
| case NVME_AER_CSS: |
| case NVME_AER_VS: |
| trace_nvme_async_event(ctrl, aer_type); |
| ctrl->aen_result = result; |
| break; |
| default: |
| break; |
| } |
| queue_work(nvme_wq, &ctrl->async_event_work); |
| } |
| EXPORT_SYMBOL_GPL(nvme_complete_async_event); |
| |
| void nvme_stop_ctrl(struct nvme_ctrl *ctrl) |
| { |
| nvme_mpath_stop(ctrl); |
| nvme_stop_keep_alive(ctrl); |
| nvme_stop_failfast_work(ctrl); |
| flush_work(&ctrl->async_event_work); |
| cancel_work_sync(&ctrl->fw_act_work); |
| } |
| EXPORT_SYMBOL_GPL(nvme_stop_ctrl); |
| |
| void nvme_start_ctrl(struct nvme_ctrl *ctrl) |
| { |
| nvme_start_keep_alive(ctrl); |
| |
| nvme_enable_aen(ctrl); |
| |
| if (ctrl->queue_count > 1) { |
| nvme_queue_scan(ctrl); |
| nvme_start_queues(ctrl); |
| } |
| } |
| EXPORT_SYMBOL_GPL(nvme_start_ctrl); |
| |
| void nvme_uninit_ctrl(struct nvme_ctrl *ctrl) |
| { |
| nvme_fault_inject_fini(&ctrl->fault_inject); |
| dev_pm_qos_hide_latency_tolerance(ctrl->device); |
| cdev_device_del(&ctrl->cdev, ctrl->device); |
| nvme_put_ctrl(ctrl); |
| } |
| EXPORT_SYMBOL_GPL(nvme_uninit_ctrl); |
| |
| static void nvme_free_cels(struct nvme_ctrl *ctrl) |
| { |
| struct nvme_effects_log *cel; |
| unsigned long i; |
| |
| xa_for_each (&ctrl->cels, i, cel) { |
| xa_erase(&ctrl->cels, i); |
| kfree(cel); |
| } |
| |
| xa_destroy(&ctrl->cels); |
| } |
| |
| static void nvme_free_ctrl(struct device *dev) |
| { |
| struct nvme_ctrl *ctrl = |
| container_of(dev, struct nvme_ctrl, ctrl_device); |
| struct nvme_subsystem *subsys = ctrl->subsys; |
| |
| if (!subsys || ctrl->instance != subsys->instance) |
| ida_simple_remove(&nvme_instance_ida, ctrl->instance); |
| |
| nvme_free_cels(ctrl); |
| nvme_mpath_uninit(ctrl); |
| __free_page(ctrl->discard_page); |
| |
| if (subsys) { |
| mutex_lock(&nvme_subsystems_lock); |
| list_del(&ctrl->subsys_entry); |
| sysfs_remove_link(&subsys->dev.kobj, dev_name(ctrl->device)); |
| mutex_unlock(&nvme_subsystems_lock); |
| } |
| |
| ctrl->ops->free_ctrl(ctrl); |
| |
| if (subsys) |
| nvme_put_subsystem(subsys); |
| } |
| |
| /* |
| * Initialize a NVMe controller structures. This needs to be called during |
| * earliest initialization so that we have the initialized structured around |
| * during probing. |
| */ |
| int nvme_init_ctrl(struct nvme_ctrl *ctrl, struct device *dev, |
| const struct nvme_ctrl_ops *ops, unsigned long quirks) |
| { |
| int ret; |
| |
| ctrl->state = NVME_CTRL_NEW; |
| clear_bit(NVME_CTRL_FAILFAST_EXPIRED, &ctrl->flags); |
| spin_lock_init(&ctrl->lock); |
| mutex_init(&ctrl->scan_lock); |
| INIT_LIST_HEAD(&ctrl->namespaces); |
| xa_init(&ctrl->cels); |
| init_rwsem(&ctrl->namespaces_rwsem); |
| ctrl->dev = dev; |
| ctrl->ops = ops; |
| ctrl->quirks = quirks; |
| ctrl->numa_node = NUMA_NO_NODE; |
| INIT_WORK(&ctrl->scan_work, nvme_scan_work); |
| INIT_WORK(&ctrl->async_event_work, nvme_async_event_work); |
| INIT_WORK(&ctrl->fw_act_work, nvme_fw_act_work); |
| INIT_WORK(&ctrl->delete_work, nvme_delete_ctrl_work); |
| init_waitqueue_head(&ctrl->state_wq); |
| |
| INIT_DELAYED_WORK(&ctrl->ka_work, nvme_keep_alive_work); |
| INIT_DELAYED_WORK(&ctrl->failfast_work, nvme_failfast_work); |
| memset(&ctrl->ka_cmd, 0, sizeof(ctrl->ka_cmd)); |
| ctrl->ka_cmd.common.opcode = nvme_admin_keep_alive; |
| |
| BUILD_BUG_ON(NVME_DSM_MAX_RANGES * sizeof(struct nvme_dsm_range) > |
| PAGE_SIZE); |
| ctrl->discard_page = alloc_page(GFP_KERNEL); |
| if (!ctrl->discard_page) { |
| ret = -ENOMEM; |
| goto out; |
| } |
| |
| ret = ida_simple_get(&nvme_instance_ida, 0, 0, GFP_KERNEL); |
| if (ret < 0) |
| goto out; |
| ctrl->instance = ret; |
| |
| device_initialize(&ctrl->ctrl_device); |
| ctrl->device = &ctrl->ctrl_device; |
| ctrl->device->devt = MKDEV(MAJOR(nvme_ctrl_base_chr_devt), |
| ctrl->instance); |
| ctrl->device->class = nvme_class; |
| ctrl->device->parent = ctrl->dev; |
| ctrl->device->groups = nvme_dev_attr_groups; |
| ctrl->device->release = nvme_free_ctrl; |
| dev_set_drvdata(ctrl->device, ctrl); |
| ret = dev_set_name(ctrl->device, "nvme%d", ctrl->instance); |
| if (ret) |
| goto out_release_instance; |
| |
| nvme_get_ctrl(ctrl); |
| cdev_init(&ctrl->cdev, &nvme_dev_fops); |
| ctrl->cdev.owner = ops->module; |
| ret = cdev_device_add(&ctrl->cdev, ctrl->device); |
| if (ret) |
| goto out_free_name; |
| |
| /* |
| * Initialize latency tolerance controls. The sysfs files won't |
| * be visible to userspace unless the device actually supports APST. |
| */ |
| ctrl->device->power.set_latency_tolerance = nvme_set_latency_tolerance; |
| dev_pm_qos_update_user_latency_tolerance(ctrl->device, |
| min(default_ps_max_latency_us, (unsigned long)S32_MAX)); |
| |
| nvme_fault_inject_init(&ctrl->fault_inject, dev_name(ctrl->device)); |
| |
| return 0; |
| out_free_name: |
| nvme_put_ctrl(ctrl); |
| kfree_const(ctrl->device->kobj.name); |
| out_release_instance: |
| ida_simple_remove(&nvme_instance_ida, ctrl->instance); |
| out: |
| if (ctrl->discard_page) |
| __free_page(ctrl->discard_page); |
| return ret; |
| } |
| EXPORT_SYMBOL_GPL(nvme_init_ctrl); |
| |
| /** |
| * nvme_kill_queues(): Ends all namespace queues |
| * @ctrl: the dead controller that needs to end |
| * |
| * Call this function when the driver determines it is unable to get the |
| * controller in a state capable of servicing IO. |
| */ |
| void nvme_kill_queues(struct nvme_ctrl *ctrl) |
| { |
| struct nvme_ns *ns; |
| |
| down_read(&ctrl->namespaces_rwsem); |
| |
| /* Forcibly unquiesce queues to avoid blocking dispatch */ |
| if (ctrl->admin_q && !blk_queue_dying(ctrl->admin_q)) |
| blk_mq_unquiesce_queue(ctrl->admin_q); |
| |
| list_for_each_entry(ns, &ctrl->namespaces, list) |
| nvme_set_queue_dying(ns); |
| |
| up_read(&ctrl->namespaces_rwsem); |
| } |
| EXPORT_SYMBOL_GPL(nvme_kill_queues); |
| |
| void nvme_unfreeze(struct nvme_ctrl *ctrl) |
| { |
| struct nvme_ns *ns; |
| |
| down_read(&ctrl->namespaces_rwsem); |
| list_for_each_entry(ns, &ctrl->namespaces, list) |
| blk_mq_unfreeze_queue(ns->queue); |
| up_read(&ctrl->namespaces_rwsem); |
| } |
| EXPORT_SYMBOL_GPL(nvme_unfreeze); |
| |
| int nvme_wait_freeze_timeout(struct nvme_ctrl *ctrl, long timeout) |
| { |
| struct nvme_ns *ns; |
| |
| down_read(&ctrl->namespaces_rwsem); |
| list_for_each_entry(ns, &ctrl->namespaces, list) { |
| timeout = blk_mq_freeze_queue_wait_timeout(ns->queue, timeout); |
| if (timeout <= 0) |
| break; |
| } |
| up_read(&ctrl->namespaces_rwsem); |
| return timeout; |
| } |
| EXPORT_SYMBOL_GPL(nvme_wait_freeze_timeout); |
| |
| void nvme_wait_freeze(struct nvme_ctrl *ctrl) |
| { |
| struct nvme_ns *ns; |
| |
| down_read(&ctrl->namespaces_rwsem); |
| list_for_each_entry(ns, &ctrl->namespaces, list) |
| blk_mq_freeze_queue_wait(ns->queue); |
| up_read(&ctrl->namespaces_rwsem); |
| } |
| EXPORT_SYMBOL_GPL(nvme_wait_freeze); |
| |
| void nvme_start_freeze(struct nvme_ctrl *ctrl) |
| { |
| struct nvme_ns *ns; |
| |
| down_read(&ctrl->namespaces_rwsem); |
| list_for_each_entry(ns, &ctrl->namespaces, list) |
| blk_freeze_queue_start(ns->queue); |
| up_read(&ctrl->namespaces_rwsem); |
| } |
| EXPORT_SYMBOL_GPL(nvme_start_freeze); |
| |
| void nvme_stop_queues(struct nvme_ctrl *ctrl) |
| { |
| struct nvme_ns *ns; |
| |
| down_read(&ctrl->namespaces_rwsem); |
| list_for_each_entry(ns, &ctrl->namespaces, list) |
| blk_mq_quiesce_queue(ns->queue); |
| up_read(&ctrl->namespaces_rwsem); |
| } |
| EXPORT_SYMBOL_GPL(nvme_stop_queues); |
| |
| void nvme_start_queues(struct nvme_ctrl *ctrl) |
| { |
| struct nvme_ns *ns; |
| |
| down_read(&ctrl->namespaces_rwsem); |
| list_for_each_entry(ns, &ctrl->namespaces, list) |
| blk_mq_unquiesce_queue(ns->queue); |
| up_read(&ctrl->namespaces_rwsem); |
| } |
| EXPORT_SYMBOL_GPL(nvme_start_queues); |
| |
| void nvme_sync_io_queues(struct nvme_ctrl *ctrl) |
| { |
| struct nvme_ns *ns; |
| |
| down_read(&ctrl->namespaces_rwsem); |
| list_for_each_entry(ns, &ctrl->namespaces, list) |
| blk_sync_queue(ns->queue); |
| up_read(&ctrl->namespaces_rwsem); |
| } |
| EXPORT_SYMBOL_GPL(nvme_sync_io_queues); |
| |
| void nvme_sync_queues(struct nvme_ctrl *ctrl) |
| { |
| nvme_sync_io_queues(ctrl); |
| if (ctrl->admin_q) |
| blk_sync_queue(ctrl->admin_q); |
| } |
| EXPORT_SYMBOL_GPL(nvme_sync_queues); |
| |
| struct nvme_ctrl *nvme_ctrl_from_file(struct file *file) |
| { |
| if (file->f_op != &nvme_dev_fops) |
| return NULL; |
| return file->private_data; |
| } |
| EXPORT_SYMBOL_NS_GPL(nvme_ctrl_from_file, NVME_TARGET_PASSTHRU); |
| |
| /* |
| * Check we didn't inadvertently grow the command structure sizes: |
| */ |
| static inline void _nvme_check_size(void) |
| { |
| BUILD_BUG_ON(sizeof(struct nvme_common_command) != 64); |
| BUILD_BUG_ON(sizeof(struct nvme_rw_command) != 64); |
| BUILD_BUG_ON(sizeof(struct nvme_identify) != 64); |
| BUILD_BUG_ON(sizeof(struct nvme_features) != 64); |
| BUILD_BUG_ON(sizeof(struct nvme_download_firmware) != 64); |
| BUILD_BUG_ON(sizeof(struct nvme_format_cmd) != 64); |
| BUILD_BUG_ON(sizeof(struct nvme_dsm_cmd) != 64); |
| BUILD_BUG_ON(sizeof(struct nvme_write_zeroes_cmd) != 64); |
| BUILD_BUG_ON(sizeof(struct nvme_abort_cmd) != 64); |
| BUILD_BUG_ON(sizeof(struct nvme_get_log_page_command) != 64); |
| BUILD_BUG_ON(sizeof(struct nvme_command) != 64); |
| BUILD_BUG_ON(sizeof(struct nvme_id_ctrl) != NVME_IDENTIFY_DATA_SIZE); |
| BUILD_BUG_ON(sizeof(struct nvme_id_ns) != NVME_IDENTIFY_DATA_SIZE); |
| BUILD_BUG_ON(sizeof(struct nvme_id_ns_zns) != NVME_IDENTIFY_DATA_SIZE); |
| BUILD_BUG_ON(sizeof(struct nvme_id_ctrl_zns) != NVME_IDENTIFY_DATA_SIZE); |
| BUILD_BUG_ON(sizeof(struct nvme_lba_range_type) != 64); |
| BUILD_BUG_ON(sizeof(struct nvme_smart_log) != 512); |
| BUILD_BUG_ON(sizeof(struct nvme_dbbuf) != 64); |
| BUILD_BUG_ON(sizeof(struct nvme_directive_cmd) != 64); |
| } |
| |
| |
| static int __init nvme_core_init(void) |
| { |
| int result = -ENOMEM; |
| |
| _nvme_check_size(); |
| |
| nvme_wq = alloc_workqueue("nvme-wq", |
| WQ_UNBOUND | WQ_MEM_RECLAIM | WQ_SYSFS, 0); |
| if (!nvme_wq) |
| goto out; |
| |
| nvme_reset_wq = alloc_workqueue("nvme-reset-wq", |
| WQ_UNBOUND | WQ_MEM_RECLAIM | WQ_SYSFS, 0); |
| if (!nvme_reset_wq) |
| goto destroy_wq; |
| |
| nvme_delete_wq = alloc_workqueue("nvme-delete-wq", |
| WQ_UNBOUND | WQ_MEM_RECLAIM | WQ_SYSFS, 0); |
| if (!nvme_delete_wq) |
| goto destroy_reset_wq; |
| |
| result = alloc_chrdev_region(&nvme_ctrl_base_chr_devt, 0, |
| NVME_MINORS, "nvme"); |
| if (result < 0) |
| goto destroy_delete_wq; |
| |
| nvme_class = class_create(THIS_MODULE, "nvme"); |
| if (IS_ERR(nvme_class)) { |
| result = PTR_ERR(nvme_class); |
| goto unregister_chrdev; |
| } |
| nvme_class->dev_uevent = nvme_class_uevent; |
| |
| nvme_subsys_class = class_create(THIS_MODULE, "nvme-subsystem"); |
| if (IS_ERR(nvme_subsys_class)) { |
| result = PTR_ERR(nvme_subsys_class); |
| goto destroy_class; |
| } |
| return 0; |
| |
| destroy_class: |
| class_destroy(nvme_class); |
| unregister_chrdev: |
| unregister_chrdev_region(nvme_ctrl_base_chr_devt, NVME_MINORS); |
| destroy_delete_wq: |
| destroy_workqueue(nvme_delete_wq); |
| destroy_reset_wq: |
| destroy_workqueue(nvme_reset_wq); |
| destroy_wq: |
| destroy_workqueue(nvme_wq); |
| out: |
| return result; |
| } |
| |
| static void __exit nvme_core_exit(void) |
| { |
| class_destroy(nvme_subsys_class); |
| class_destroy(nvme_class); |
| unregister_chrdev_region(nvme_ctrl_base_chr_devt, NVME_MINORS); |
| destroy_workqueue(nvme_delete_wq); |
| destroy_workqueue(nvme_reset_wq); |
| destroy_workqueue(nvme_wq); |
| ida_destroy(&nvme_instance_ida); |
| } |
| |
| MODULE_LICENSE("GPL"); |
| MODULE_VERSION("1.0"); |
| module_init(nvme_core_init); |
| module_exit(nvme_core_exit); |