Thomas Gleixner | f33f5fe | 2019-05-22 09:51:24 +0200 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 2 | /* |
| 3 | * Virtio SCSI HBA driver |
| 4 | * |
| 5 | * Copyright IBM Corp. 2010 |
| 6 | * Copyright Red Hat, Inc. 2011 |
| 7 | * |
| 8 | * Authors: |
| 9 | * Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> |
| 10 | * Paolo Bonzini <pbonzini@redhat.com> |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 11 | */ |
| 12 | |
Wanlong Gao | ba06d1e | 2013-03-12 15:34:40 +1030 | [diff] [blame] | 13 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 14 | |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 15 | #include <linux/module.h> |
| 16 | #include <linux/slab.h> |
| 17 | #include <linux/mempool.h> |
Christoph Hellwig | 0d9f0a5 | 2017-02-05 18:15:26 +0100 | [diff] [blame] | 18 | #include <linux/interrupt.h> |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 19 | #include <linux/virtio.h> |
| 20 | #include <linux/virtio_ids.h> |
| 21 | #include <linux/virtio_config.h> |
| 22 | #include <linux/virtio_scsi.h> |
Paolo Bonzini | 9141a4c | 2013-04-08 23:03:25 +0930 | [diff] [blame] | 23 | #include <linux/cpu.h> |
Nicholas Bellinger | e6dc783a | 2014-02-22 18:23:33 -0800 | [diff] [blame] | 24 | #include <linux/blkdev.h> |
Christoph Hellwig | fe45e63 | 2021-09-20 14:33:27 +0200 | [diff] [blame] | 25 | #include <linux/blk-integrity.h> |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 26 | #include <scsi/scsi_host.h> |
| 27 | #include <scsi/scsi_device.h> |
| 28 | #include <scsi/scsi_cmnd.h> |
Venkatesh Srinivas | 761f119 | 2014-07-06 16:39:27 +0200 | [diff] [blame] | 29 | #include <scsi/scsi_tcq.h> |
David Gibson | 25d1d50 | 2017-04-13 12:13:00 +1000 | [diff] [blame] | 30 | #include <scsi/scsi_devinfo.h> |
Ming Lei | 938ece7 | 2014-07-06 16:39:26 +0200 | [diff] [blame] | 31 | #include <linux/seqlock.h> |
Christoph Hellwig | 0d9f0a5 | 2017-02-05 18:15:26 +0100 | [diff] [blame] | 32 | #include <linux/blk-mq-virtio.h> |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 33 | |
Matt Lupfer | 5ff8437 | 2019-09-05 18:19:28 +0000 | [diff] [blame] | 34 | #include "sd.h" |
| 35 | |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 36 | #define VIRTIO_SCSI_MEMPOOL_SZ 64 |
Cong Meng | 365a715 | 2012-07-05 17:06:43 +0800 | [diff] [blame] | 37 | #define VIRTIO_SCSI_EVENT_LEN 8 |
Paolo Bonzini | 9141a4c | 2013-04-08 23:03:25 +0930 | [diff] [blame] | 38 | #define VIRTIO_SCSI_VQ_BASE 2 |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 39 | |
Mike Christie | 95e72496 | 2023-12-13 23:26:49 -0600 | [diff] [blame] | 40 | static unsigned int virtscsi_poll_queues; |
| 41 | module_param(virtscsi_poll_queues, uint, 0644); |
| 42 | MODULE_PARM_DESC(virtscsi_poll_queues, |
| 43 | "The number of dedicated virtqueues for polling I/O"); |
| 44 | |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 45 | /* Command queue element */ |
| 46 | struct virtio_scsi_cmd { |
| 47 | struct scsi_cmnd *sc; |
| 48 | struct completion *comp; |
| 49 | union { |
| 50 | struct virtio_scsi_cmd_req cmd; |
Nicholas Bellinger | e6dc783a | 2014-02-22 18:23:33 -0800 | [diff] [blame] | 51 | struct virtio_scsi_cmd_req_pi cmd_pi; |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 52 | struct virtio_scsi_ctrl_tmf_req tmf; |
| 53 | struct virtio_scsi_ctrl_an_req an; |
| 54 | } req; |
| 55 | union { |
| 56 | struct virtio_scsi_cmd_resp cmd; |
| 57 | struct virtio_scsi_ctrl_tmf_resp tmf; |
| 58 | struct virtio_scsi_ctrl_an_resp an; |
| 59 | struct virtio_scsi_event evt; |
| 60 | } resp; |
| 61 | } ____cacheline_aligned_in_smp; |
| 62 | |
Cong Meng | 365a715 | 2012-07-05 17:06:43 +0800 | [diff] [blame] | 63 | struct virtio_scsi_event_node { |
| 64 | struct virtio_scsi *vscsi; |
| 65 | struct virtio_scsi_event event; |
| 66 | struct work_struct work; |
| 67 | }; |
| 68 | |
Paolo Bonzini | 139fe45 | 2012-06-13 16:56:32 +0200 | [diff] [blame] | 69 | struct virtio_scsi_vq { |
| 70 | /* Protects vq */ |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 71 | spinlock_t vq_lock; |
| 72 | |
Paolo Bonzini | 139fe45 | 2012-06-13 16:56:32 +0200 | [diff] [blame] | 73 | struct virtqueue *vq; |
| 74 | }; |
| 75 | |
| 76 | /* Driver instance state */ |
| 77 | struct virtio_scsi { |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 78 | struct virtio_device *vdev; |
Paolo Bonzini | 2bd37f0 | 2012-06-13 16:56:34 +0200 | [diff] [blame] | 79 | |
Cong Meng | 365a715 | 2012-07-05 17:06:43 +0800 | [diff] [blame] | 80 | /* Get some buffers ready for event vq */ |
| 81 | struct virtio_scsi_event_node event_list[VIRTIO_SCSI_EVENT_LEN]; |
Paolo Bonzini | 9141a4c | 2013-04-08 23:03:25 +0930 | [diff] [blame] | 82 | |
| 83 | u32 num_queues; |
Mike Christie | 95e72496 | 2023-12-13 23:26:49 -0600 | [diff] [blame] | 84 | int io_queues[HCTX_MAX_TYPES]; |
Paolo Bonzini | 9141a4c | 2013-04-08 23:03:25 +0930 | [diff] [blame] | 85 | |
Sebastian Andrzej Siewior | 8904f5a | 2016-09-06 19:04:46 +0200 | [diff] [blame] | 86 | struct hlist_node node; |
Wanlong Gao | 285e71e | 2013-04-08 23:05:49 +0930 | [diff] [blame] | 87 | |
Michael S. Tsirkin | e67423c | 2014-10-15 10:22:33 +1030 | [diff] [blame] | 88 | /* Protected by event_vq lock */ |
| 89 | bool stop_events; |
| 90 | |
Paolo Bonzini | 9141a4c | 2013-04-08 23:03:25 +0930 | [diff] [blame] | 91 | struct virtio_scsi_vq ctrl_vq; |
| 92 | struct virtio_scsi_vq event_vq; |
| 93 | struct virtio_scsi_vq req_vqs[]; |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 94 | }; |
| 95 | |
| 96 | static struct kmem_cache *virtscsi_cmd_cache; |
| 97 | static mempool_t *virtscsi_cmd_pool; |
| 98 | |
| 99 | static inline struct Scsi_Host *virtio_scsi_host(struct virtio_device *vdev) |
| 100 | { |
| 101 | return vdev->priv; |
| 102 | } |
| 103 | |
| 104 | static void virtscsi_compute_resid(struct scsi_cmnd *sc, u32 resid) |
| 105 | { |
Christoph Hellwig | ae3d56d | 2019-01-29 09:33:07 +0100 | [diff] [blame] | 106 | if (resid) |
Xie Yongji | 5f638e5 | 2021-06-15 18:52:18 +0800 | [diff] [blame] | 107 | scsi_set_resid(sc, min(resid, scsi_bufflen(sc))); |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 108 | } |
| 109 | |
Lee Jones | e31f266 | 2020-07-13 08:59:49 +0100 | [diff] [blame] | 110 | /* |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 111 | * virtscsi_complete_cmd - finish a scsi_cmd and invoke scsi_done |
| 112 | * |
| 113 | * Called with vq_lock held. |
| 114 | */ |
Paolo Bonzini | 7f82b3c | 2013-04-08 23:01:38 +0930 | [diff] [blame] | 115 | static void virtscsi_complete_cmd(struct virtio_scsi *vscsi, void *buf) |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 116 | { |
| 117 | struct virtio_scsi_cmd *cmd = buf; |
| 118 | struct scsi_cmnd *sc = cmd->sc; |
| 119 | struct virtio_scsi_cmd_resp *resp = &cmd->resp.cmd; |
| 120 | |
| 121 | dev_dbg(&sc->device->sdev_gendev, |
| 122 | "cmd %p response %u status %#02x sense_len %u\n", |
| 123 | sc, resp->response, resp->status, resp->sense_len); |
| 124 | |
| 125 | sc->result = resp->status; |
Michael S. Tsirkin | d75dff3 | 2014-11-23 17:28:57 +0200 | [diff] [blame] | 126 | virtscsi_compute_resid(sc, virtio32_to_cpu(vscsi->vdev, resp->resid)); |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 127 | switch (resp->response) { |
| 128 | case VIRTIO_SCSI_S_OK: |
| 129 | set_host_byte(sc, DID_OK); |
| 130 | break; |
| 131 | case VIRTIO_SCSI_S_OVERRUN: |
| 132 | set_host_byte(sc, DID_ERROR); |
| 133 | break; |
| 134 | case VIRTIO_SCSI_S_ABORTED: |
| 135 | set_host_byte(sc, DID_ABORT); |
| 136 | break; |
| 137 | case VIRTIO_SCSI_S_BAD_TARGET: |
| 138 | set_host_byte(sc, DID_BAD_TARGET); |
| 139 | break; |
| 140 | case VIRTIO_SCSI_S_RESET: |
| 141 | set_host_byte(sc, DID_RESET); |
| 142 | break; |
| 143 | case VIRTIO_SCSI_S_BUSY: |
| 144 | set_host_byte(sc, DID_BUS_BUSY); |
| 145 | break; |
| 146 | case VIRTIO_SCSI_S_TRANSPORT_FAILURE: |
| 147 | set_host_byte(sc, DID_TRANSPORT_DISRUPTED); |
| 148 | break; |
| 149 | case VIRTIO_SCSI_S_TARGET_FAILURE: |
Mike Christie | beb4dac | 2022-08-11 20:00:21 -0500 | [diff] [blame] | 150 | set_host_byte(sc, DID_BAD_TARGET); |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 151 | break; |
| 152 | case VIRTIO_SCSI_S_NEXUS_FAILURE: |
Mike Christie | 377a7b0 | 2022-08-11 20:00:22 -0500 | [diff] [blame] | 153 | set_status_byte(sc, SAM_STAT_RESERVATION_CONFLICT); |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 154 | break; |
| 155 | default: |
| 156 | scmd_printk(KERN_WARNING, sc, "Unknown response %d", |
| 157 | resp->response); |
Gustavo A. R. Silva | df561f66 | 2020-08-23 17:36:59 -0500 | [diff] [blame] | 158 | fallthrough; |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 159 | case VIRTIO_SCSI_S_FAILURE: |
| 160 | set_host_byte(sc, DID_ERROR); |
| 161 | break; |
| 162 | } |
| 163 | |
Michael S. Tsirkin | d75dff3 | 2014-11-23 17:28:57 +0200 | [diff] [blame] | 164 | WARN_ON(virtio32_to_cpu(vscsi->vdev, resp->sense_len) > |
| 165 | VIRTIO_SCSI_SENSE_SIZE); |
Hannes Reinecke | c43ddbf | 2021-06-22 11:11:53 +0200 | [diff] [blame] | 166 | if (resp->sense_len) { |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 167 | memcpy(sc->sense_buffer, resp->sense, |
Michael S. Tsirkin | d75dff3 | 2014-11-23 17:28:57 +0200 | [diff] [blame] | 168 | min_t(u32, |
| 169 | virtio32_to_cpu(vscsi->vdev, resp->sense_len), |
| 170 | VIRTIO_SCSI_SENSE_SIZE)); |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 171 | } |
| 172 | |
Bart Van Assche | b4194fc | 2021-10-07 13:46:02 -0700 | [diff] [blame] | 173 | scsi_done(sc); |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 174 | } |
| 175 | |
Paolo Bonzini | 10f34f6 | 2013-04-08 23:02:07 +0930 | [diff] [blame] | 176 | static void virtscsi_vq_done(struct virtio_scsi *vscsi, |
| 177 | struct virtio_scsi_vq *virtscsi_vq, |
Paolo Bonzini | 7f82b3c | 2013-04-08 23:01:38 +0930 | [diff] [blame] | 178 | void (*fn)(struct virtio_scsi *vscsi, void *buf)) |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 179 | { |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 180 | void *buf; |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 181 | unsigned int len; |
Paolo Bonzini | 10f34f6 | 2013-04-08 23:02:07 +0930 | [diff] [blame] | 182 | unsigned long flags; |
| 183 | struct virtqueue *vq = virtscsi_vq->vq; |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 184 | |
Paolo Bonzini | 10f34f6 | 2013-04-08 23:02:07 +0930 | [diff] [blame] | 185 | spin_lock_irqsave(&virtscsi_vq->vq_lock, flags); |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 186 | do { |
| 187 | virtqueue_disable_cb(vq); |
| 188 | while ((buf = virtqueue_get_buf(vq, &len)) != NULL) |
Paolo Bonzini | 7f82b3c | 2013-04-08 23:01:38 +0930 | [diff] [blame] | 189 | fn(vscsi, buf); |
Heinz Graalfs | 2bf4fd3 | 2013-11-11 11:52:43 +1030 | [diff] [blame] | 190 | |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 191 | } while (!virtqueue_enable_cb(vq)); |
Paolo Bonzini | 10f34f6 | 2013-04-08 23:02:07 +0930 | [diff] [blame] | 192 | spin_unlock_irqrestore(&virtscsi_vq->vq_lock, flags); |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 193 | } |
| 194 | |
| 195 | static void virtscsi_req_done(struct virtqueue *vq) |
| 196 | { |
Paolo Bonzini | 139fe45 | 2012-06-13 16:56:32 +0200 | [diff] [blame] | 197 | struct Scsi_Host *sh = virtio_scsi_host(vq->vdev); |
| 198 | struct virtio_scsi *vscsi = shost_priv(sh); |
Paolo Bonzini | 9141a4c | 2013-04-08 23:03:25 +0930 | [diff] [blame] | 199 | int index = vq->index - VIRTIO_SCSI_VQ_BASE; |
| 200 | struct virtio_scsi_vq *req_vq = &vscsi->req_vqs[index]; |
Paolo Bonzini | 139fe45 | 2012-06-13 16:56:32 +0200 | [diff] [blame] | 201 | |
Paolo Bonzini | 9141a4c | 2013-04-08 23:03:25 +0930 | [diff] [blame] | 202 | virtscsi_vq_done(vscsi, req_vq, virtscsi_complete_cmd); |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 203 | }; |
| 204 | |
Paolo Bonzini | 8faeb52 | 2014-06-04 13:34:58 +0200 | [diff] [blame] | 205 | static void virtscsi_poll_requests(struct virtio_scsi *vscsi) |
| 206 | { |
| 207 | int i, num_vqs; |
| 208 | |
| 209 | num_vqs = vscsi->num_queues; |
| 210 | for (i = 0; i < num_vqs; i++) |
| 211 | virtscsi_vq_done(vscsi, &vscsi->req_vqs[i], |
| 212 | virtscsi_complete_cmd); |
| 213 | } |
| 214 | |
Paolo Bonzini | 7f82b3c | 2013-04-08 23:01:38 +0930 | [diff] [blame] | 215 | static void virtscsi_complete_free(struct virtio_scsi *vscsi, void *buf) |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 216 | { |
| 217 | struct virtio_scsi_cmd *cmd = buf; |
| 218 | |
| 219 | if (cmd->comp) |
Daniel Wagner | e8f8142 | 2016-09-13 10:58:50 +0200 | [diff] [blame] | 220 | complete(cmd->comp); |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 221 | } |
| 222 | |
| 223 | static void virtscsi_ctrl_done(struct virtqueue *vq) |
| 224 | { |
Paolo Bonzini | 139fe45 | 2012-06-13 16:56:32 +0200 | [diff] [blame] | 225 | struct Scsi_Host *sh = virtio_scsi_host(vq->vdev); |
| 226 | struct virtio_scsi *vscsi = shost_priv(sh); |
Paolo Bonzini | 139fe45 | 2012-06-13 16:56:32 +0200 | [diff] [blame] | 227 | |
Paolo Bonzini | 10f34f6 | 2013-04-08 23:02:07 +0930 | [diff] [blame] | 228 | virtscsi_vq_done(vscsi, &vscsi->ctrl_vq, virtscsi_complete_free); |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 229 | }; |
| 230 | |
Paolo Bonzini | cdda0e5 | 2014-06-04 13:34:56 +0200 | [diff] [blame] | 231 | static void virtscsi_handle_event(struct work_struct *work); |
| 232 | |
Cong Meng | 365a715 | 2012-07-05 17:06:43 +0800 | [diff] [blame] | 233 | static int virtscsi_kick_event(struct virtio_scsi *vscsi, |
| 234 | struct virtio_scsi_event_node *event_node) |
| 235 | { |
Rusty Russell | 4614e51 | 2012-10-16 23:56:16 +1030 | [diff] [blame] | 236 | int err; |
Cong Meng | 365a715 | 2012-07-05 17:06:43 +0800 | [diff] [blame] | 237 | struct scatterlist sg; |
| 238 | unsigned long flags; |
| 239 | |
Paolo Bonzini | cdda0e5 | 2014-06-04 13:34:56 +0200 | [diff] [blame] | 240 | INIT_WORK(&event_node->work, virtscsi_handle_event); |
Richard W.M. Jones | 2e9c9df | 2012-10-02 17:25:46 +0200 | [diff] [blame] | 241 | sg_init_one(&sg, &event_node->event, sizeof(struct virtio_scsi_event)); |
Cong Meng | 365a715 | 2012-07-05 17:06:43 +0800 | [diff] [blame] | 242 | |
| 243 | spin_lock_irqsave(&vscsi->event_vq.vq_lock, flags); |
| 244 | |
Rusty Russell | bf95829 | 2013-03-20 15:44:28 +1030 | [diff] [blame] | 245 | err = virtqueue_add_inbuf(vscsi->event_vq.vq, &sg, 1, event_node, |
| 246 | GFP_ATOMIC); |
Rusty Russell | 4614e51 | 2012-10-16 23:56:16 +1030 | [diff] [blame] | 247 | if (!err) |
Cong Meng | 365a715 | 2012-07-05 17:06:43 +0800 | [diff] [blame] | 248 | virtqueue_kick(vscsi->event_vq.vq); |
| 249 | |
| 250 | spin_unlock_irqrestore(&vscsi->event_vq.vq_lock, flags); |
| 251 | |
Rusty Russell | 4614e51 | 2012-10-16 23:56:16 +1030 | [diff] [blame] | 252 | return err; |
Cong Meng | 365a715 | 2012-07-05 17:06:43 +0800 | [diff] [blame] | 253 | } |
| 254 | |
| 255 | static int virtscsi_kick_event_all(struct virtio_scsi *vscsi) |
| 256 | { |
| 257 | int i; |
| 258 | |
| 259 | for (i = 0; i < VIRTIO_SCSI_EVENT_LEN; i++) { |
| 260 | vscsi->event_list[i].vscsi = vscsi; |
| 261 | virtscsi_kick_event(vscsi, &vscsi->event_list[i]); |
| 262 | } |
| 263 | |
| 264 | return 0; |
| 265 | } |
| 266 | |
| 267 | static void virtscsi_cancel_event_work(struct virtio_scsi *vscsi) |
| 268 | { |
| 269 | int i; |
| 270 | |
Michael S. Tsirkin | e67423c | 2014-10-15 10:22:33 +1030 | [diff] [blame] | 271 | /* Stop scheduling work before calling cancel_work_sync. */ |
| 272 | spin_lock_irq(&vscsi->event_vq.vq_lock); |
| 273 | vscsi->stop_events = true; |
| 274 | spin_unlock_irq(&vscsi->event_vq.vq_lock); |
| 275 | |
Cong Meng | 365a715 | 2012-07-05 17:06:43 +0800 | [diff] [blame] | 276 | for (i = 0; i < VIRTIO_SCSI_EVENT_LEN; i++) |
| 277 | cancel_work_sync(&vscsi->event_list[i].work); |
| 278 | } |
| 279 | |
| 280 | static void virtscsi_handle_transport_reset(struct virtio_scsi *vscsi, |
Paolo Bonzini | 9141a4c | 2013-04-08 23:03:25 +0930 | [diff] [blame] | 281 | struct virtio_scsi_event *event) |
Cong Meng | 365a715 | 2012-07-05 17:06:43 +0800 | [diff] [blame] | 282 | { |
| 283 | struct scsi_device *sdev; |
| 284 | struct Scsi_Host *shost = virtio_scsi_host(vscsi->vdev); |
| 285 | unsigned int target = event->lun[1]; |
| 286 | unsigned int lun = (event->lun[2] << 8) | event->lun[3]; |
| 287 | |
Michael S. Tsirkin | d75dff3 | 2014-11-23 17:28:57 +0200 | [diff] [blame] | 288 | switch (virtio32_to_cpu(vscsi->vdev, event->reason)) { |
Cong Meng | 365a715 | 2012-07-05 17:06:43 +0800 | [diff] [blame] | 289 | case VIRTIO_SCSI_EVT_RESET_RESCAN: |
Matej Genci | beef6fd | 2020-08-28 12:21:35 +0000 | [diff] [blame] | 290 | if (lun == 0) { |
| 291 | scsi_scan_target(&shost->shost_gendev, 0, target, |
| 292 | SCAN_WILD_CARD, SCSI_SCAN_INITIAL); |
| 293 | } else { |
| 294 | scsi_add_device(shost, 0, target, lun); |
| 295 | } |
Cong Meng | 365a715 | 2012-07-05 17:06:43 +0800 | [diff] [blame] | 296 | break; |
| 297 | case VIRTIO_SCSI_EVT_RESET_REMOVED: |
| 298 | sdev = scsi_device_lookup(shost, 0, target, lun); |
| 299 | if (sdev) { |
| 300 | scsi_remove_device(sdev); |
| 301 | scsi_device_put(sdev); |
| 302 | } else { |
| 303 | pr_err("SCSI device %d 0 %d %d not found\n", |
| 304 | shost->host_no, target, lun); |
| 305 | } |
| 306 | break; |
| 307 | default: |
Colin Ian King | cced4c0 | 2021-09-25 00:03:30 +0100 | [diff] [blame] | 308 | pr_info("Unsupported virtio scsi event reason %x\n", event->reason); |
Cong Meng | 365a715 | 2012-07-05 17:06:43 +0800 | [diff] [blame] | 309 | } |
| 310 | } |
| 311 | |
Paolo Bonzini | 865b58c | 2012-10-02 17:25:48 +0200 | [diff] [blame] | 312 | static void virtscsi_handle_param_change(struct virtio_scsi *vscsi, |
| 313 | struct virtio_scsi_event *event) |
| 314 | { |
| 315 | struct scsi_device *sdev; |
| 316 | struct Scsi_Host *shost = virtio_scsi_host(vscsi->vdev); |
| 317 | unsigned int target = event->lun[1]; |
| 318 | unsigned int lun = (event->lun[2] << 8) | event->lun[3]; |
Michael S. Tsirkin | d75dff3 | 2014-11-23 17:28:57 +0200 | [diff] [blame] | 319 | u8 asc = virtio32_to_cpu(vscsi->vdev, event->reason) & 255; |
| 320 | u8 ascq = virtio32_to_cpu(vscsi->vdev, event->reason) >> 8; |
Paolo Bonzini | 865b58c | 2012-10-02 17:25:48 +0200 | [diff] [blame] | 321 | |
| 322 | sdev = scsi_device_lookup(shost, 0, target, lun); |
| 323 | if (!sdev) { |
| 324 | pr_err("SCSI device %d 0 %d %d not found\n", |
| 325 | shost->host_no, target, lun); |
| 326 | return; |
| 327 | } |
| 328 | |
| 329 | /* Handle "Parameters changed", "Mode parameters changed", and |
| 330 | "Capacity data has changed". */ |
| 331 | if (asc == 0x2a && (ascq == 0x00 || ascq == 0x01 || ascq == 0x09)) |
Bart Van Assche | 7951952 | 2023-08-22 08:30:41 -0700 | [diff] [blame] | 332 | scsi_rescan_device(sdev); |
Paolo Bonzini | 865b58c | 2012-10-02 17:25:48 +0200 | [diff] [blame] | 333 | |
| 334 | scsi_device_put(sdev); |
| 335 | } |
| 336 | |
Zheng Wang | 08707b5 | 2023-02-02 14:41:24 +0800 | [diff] [blame] | 337 | static int virtscsi_rescan_hotunplug(struct virtio_scsi *vscsi) |
Matt Lupfer | 5ff8437 | 2019-09-05 18:19:28 +0000 | [diff] [blame] | 338 | { |
| 339 | struct scsi_device *sdev; |
| 340 | struct Scsi_Host *shost = virtio_scsi_host(vscsi->vdev); |
| 341 | unsigned char scsi_cmd[MAX_COMMAND_SIZE]; |
| 342 | int result, inquiry_len, inq_result_len = 256; |
| 343 | char *inq_result = kmalloc(inq_result_len, GFP_KERNEL); |
| 344 | |
Christophe JAILLET | 0e5e41e | 2023-05-29 09:35:08 +0200 | [diff] [blame] | 345 | if (!inq_result) |
Zheng Wang | 08707b5 | 2023-02-02 14:41:24 +0800 | [diff] [blame] | 346 | return -ENOMEM; |
Zheng Wang | 08707b5 | 2023-02-02 14:41:24 +0800 | [diff] [blame] | 347 | |
Matt Lupfer | 5ff8437 | 2019-09-05 18:19:28 +0000 | [diff] [blame] | 348 | shost_for_each_device(sdev, shost) { |
| 349 | inquiry_len = sdev->inquiry_len ? sdev->inquiry_len : 36; |
| 350 | |
| 351 | memset(scsi_cmd, 0, sizeof(scsi_cmd)); |
| 352 | scsi_cmd[0] = INQUIRY; |
| 353 | scsi_cmd[4] = (unsigned char) inquiry_len; |
| 354 | |
| 355 | memset(inq_result, 0, inq_result_len); |
| 356 | |
Mike Christie | 5314ce76 | 2022-12-29 13:01:51 -0600 | [diff] [blame] | 357 | result = scsi_execute_cmd(sdev, scsi_cmd, REQ_OP_DRV_IN, |
| 358 | inq_result, inquiry_len, |
Matt Lupfer | 5ff8437 | 2019-09-05 18:19:28 +0000 | [diff] [blame] | 359 | SD_TIMEOUT, SD_MAX_RETRIES, NULL); |
| 360 | |
| 361 | if (result == 0 && inq_result[0] >> 5) { |
| 362 | /* PQ indicates the LUN is not attached */ |
| 363 | scsi_remove_device(sdev); |
Hannes Reinecke | ced202f7 | 2021-04-27 10:30:12 +0200 | [diff] [blame] | 364 | } else if (result > 0 && host_byte(result) == DID_BAD_TARGET) { |
Maxim Levitsky | bb2e331 | 2020-07-29 22:48:06 +0300 | [diff] [blame] | 365 | /* |
| 366 | * If all LUNs of a virtio-scsi device are unplugged |
| 367 | * it will respond with BAD TARGET on any INQUIRY |
| 368 | * command. |
| 369 | * Remove the device in this case as well. |
| 370 | */ |
| 371 | scsi_remove_device(sdev); |
Matt Lupfer | 5ff8437 | 2019-09-05 18:19:28 +0000 | [diff] [blame] | 372 | } |
| 373 | } |
| 374 | |
| 375 | kfree(inq_result); |
Zheng Wang | 08707b5 | 2023-02-02 14:41:24 +0800 | [diff] [blame] | 376 | return 0; |
Matt Lupfer | 5ff8437 | 2019-09-05 18:19:28 +0000 | [diff] [blame] | 377 | } |
| 378 | |
Cong Meng | 365a715 | 2012-07-05 17:06:43 +0800 | [diff] [blame] | 379 | static void virtscsi_handle_event(struct work_struct *work) |
| 380 | { |
| 381 | struct virtio_scsi_event_node *event_node = |
| 382 | container_of(work, struct virtio_scsi_event_node, work); |
| 383 | struct virtio_scsi *vscsi = event_node->vscsi; |
| 384 | struct virtio_scsi_event *event = &event_node->event; |
| 385 | |
Michael S. Tsirkin | d75dff3 | 2014-11-23 17:28:57 +0200 | [diff] [blame] | 386 | if (event->event & |
| 387 | cpu_to_virtio32(vscsi->vdev, VIRTIO_SCSI_T_EVENTS_MISSED)) { |
Zheng Wang | 08707b5 | 2023-02-02 14:41:24 +0800 | [diff] [blame] | 388 | int ret; |
| 389 | |
Michael S. Tsirkin | d75dff3 | 2014-11-23 17:28:57 +0200 | [diff] [blame] | 390 | event->event &= ~cpu_to_virtio32(vscsi->vdev, |
| 391 | VIRTIO_SCSI_T_EVENTS_MISSED); |
Zheng Wang | 08707b5 | 2023-02-02 14:41:24 +0800 | [diff] [blame] | 392 | ret = virtscsi_rescan_hotunplug(vscsi); |
| 393 | if (ret) |
| 394 | return; |
Cong Meng | 365a715 | 2012-07-05 17:06:43 +0800 | [diff] [blame] | 395 | scsi_scan_host(virtio_scsi_host(vscsi->vdev)); |
| 396 | } |
| 397 | |
Michael S. Tsirkin | d75dff3 | 2014-11-23 17:28:57 +0200 | [diff] [blame] | 398 | switch (virtio32_to_cpu(vscsi->vdev, event->event)) { |
Cong Meng | 365a715 | 2012-07-05 17:06:43 +0800 | [diff] [blame] | 399 | case VIRTIO_SCSI_T_NO_EVENT: |
| 400 | break; |
| 401 | case VIRTIO_SCSI_T_TRANSPORT_RESET: |
| 402 | virtscsi_handle_transport_reset(vscsi, event); |
| 403 | break; |
Paolo Bonzini | 865b58c | 2012-10-02 17:25:48 +0200 | [diff] [blame] | 404 | case VIRTIO_SCSI_T_PARAM_CHANGE: |
| 405 | virtscsi_handle_param_change(vscsi, event); |
| 406 | break; |
Cong Meng | 365a715 | 2012-07-05 17:06:43 +0800 | [diff] [blame] | 407 | default: |
Colin Ian King | cced4c0 | 2021-09-25 00:03:30 +0100 | [diff] [blame] | 408 | pr_err("Unsupported virtio scsi event %x\n", event->event); |
Cong Meng | 365a715 | 2012-07-05 17:06:43 +0800 | [diff] [blame] | 409 | } |
| 410 | virtscsi_kick_event(vscsi, event_node); |
| 411 | } |
| 412 | |
Paolo Bonzini | 7f82b3c | 2013-04-08 23:01:38 +0930 | [diff] [blame] | 413 | static void virtscsi_complete_event(struct virtio_scsi *vscsi, void *buf) |
Cong Meng | 365a715 | 2012-07-05 17:06:43 +0800 | [diff] [blame] | 414 | { |
| 415 | struct virtio_scsi_event_node *event_node = buf; |
| 416 | |
Michael S. Tsirkin | e67423c | 2014-10-15 10:22:33 +1030 | [diff] [blame] | 417 | if (!vscsi->stop_events) |
| 418 | queue_work(system_freezable_wq, &event_node->work); |
Cong Meng | 365a715 | 2012-07-05 17:06:43 +0800 | [diff] [blame] | 419 | } |
| 420 | |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 421 | static void virtscsi_event_done(struct virtqueue *vq) |
| 422 | { |
Paolo Bonzini | 139fe45 | 2012-06-13 16:56:32 +0200 | [diff] [blame] | 423 | struct Scsi_Host *sh = virtio_scsi_host(vq->vdev); |
| 424 | struct virtio_scsi *vscsi = shost_priv(sh); |
Paolo Bonzini | 139fe45 | 2012-06-13 16:56:32 +0200 | [diff] [blame] | 425 | |
Paolo Bonzini | 10f34f6 | 2013-04-08 23:02:07 +0930 | [diff] [blame] | 426 | virtscsi_vq_done(vscsi, &vscsi->event_vq, virtscsi_complete_event); |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 427 | }; |
| 428 | |
Paolo Bonzini | 9e5470f | 2019-05-30 13:28:11 +0200 | [diff] [blame] | 429 | static int __virtscsi_add_cmd(struct virtqueue *vq, |
Wanlong Gao | 682993b | 2013-03-20 15:44:28 +1030 | [diff] [blame] | 430 | struct virtio_scsi_cmd *cmd, |
Rusty Russell | c77fba9 | 2014-05-21 11:25:04 +0930 | [diff] [blame] | 431 | size_t req_size, size_t resp_size) |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 432 | { |
| 433 | struct scsi_cmnd *sc = cmd->sc; |
Nicholas Bellinger | e6dc783a | 2014-02-22 18:23:33 -0800 | [diff] [blame] | 434 | struct scatterlist *sgs[6], req, resp; |
Wanlong Gao | 682993b | 2013-03-20 15:44:28 +1030 | [diff] [blame] | 435 | struct sg_table *out, *in; |
| 436 | unsigned out_num = 0, in_num = 0; |
| 437 | |
| 438 | out = in = NULL; |
| 439 | |
| 440 | if (sc && sc->sc_data_direction != DMA_NONE) { |
| 441 | if (sc->sc_data_direction != DMA_FROM_DEVICE) |
Christoph Hellwig | ae3d56d | 2019-01-29 09:33:07 +0100 | [diff] [blame] | 442 | out = &sc->sdb.table; |
Wanlong Gao | 682993b | 2013-03-20 15:44:28 +1030 | [diff] [blame] | 443 | if (sc->sc_data_direction != DMA_TO_DEVICE) |
Christoph Hellwig | ae3d56d | 2019-01-29 09:33:07 +0100 | [diff] [blame] | 444 | in = &sc->sdb.table; |
Wanlong Gao | 682993b | 2013-03-20 15:44:28 +1030 | [diff] [blame] | 445 | } |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 446 | |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 447 | /* Request header. */ |
Wanlong Gao | 682993b | 2013-03-20 15:44:28 +1030 | [diff] [blame] | 448 | sg_init_one(&req, &cmd->req, req_size); |
| 449 | sgs[out_num++] = &req; |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 450 | |
| 451 | /* Data-out buffer. */ |
Nicholas Bellinger | e6dc783a | 2014-02-22 18:23:33 -0800 | [diff] [blame] | 452 | if (out) { |
| 453 | /* Place WRITE protection SGLs before Data OUT payload */ |
| 454 | if (scsi_prot_sg_count(sc)) |
| 455 | sgs[out_num++] = scsi_prot_sglist(sc); |
Wanlong Gao | 682993b | 2013-03-20 15:44:28 +1030 | [diff] [blame] | 456 | sgs[out_num++] = out->sgl; |
Nicholas Bellinger | e6dc783a | 2014-02-22 18:23:33 -0800 | [diff] [blame] | 457 | } |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 458 | |
| 459 | /* Response header. */ |
Wanlong Gao | 682993b | 2013-03-20 15:44:28 +1030 | [diff] [blame] | 460 | sg_init_one(&resp, &cmd->resp, resp_size); |
| 461 | sgs[out_num + in_num++] = &resp; |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 462 | |
| 463 | /* Data-in buffer */ |
Nicholas Bellinger | e6dc783a | 2014-02-22 18:23:33 -0800 | [diff] [blame] | 464 | if (in) { |
| 465 | /* Place READ protection SGLs before Data IN payload */ |
| 466 | if (scsi_prot_sg_count(sc)) |
| 467 | sgs[out_num + in_num++] = scsi_prot_sglist(sc); |
Wanlong Gao | 682993b | 2013-03-20 15:44:28 +1030 | [diff] [blame] | 468 | sgs[out_num + in_num++] = in->sgl; |
Nicholas Bellinger | e6dc783a | 2014-02-22 18:23:33 -0800 | [diff] [blame] | 469 | } |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 470 | |
Rusty Russell | c77fba9 | 2014-05-21 11:25:04 +0930 | [diff] [blame] | 471 | return virtqueue_add_sgs(vq, sgs, out_num, in_num, cmd, GFP_ATOMIC); |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 472 | } |
| 473 | |
Paolo Bonzini | 9e5470f | 2019-05-30 13:28:11 +0200 | [diff] [blame] | 474 | static void virtscsi_kick_vq(struct virtio_scsi_vq *vq) |
| 475 | { |
| 476 | bool needs_kick; |
| 477 | unsigned long flags; |
| 478 | |
| 479 | spin_lock_irqsave(&vq->vq_lock, flags); |
| 480 | needs_kick = virtqueue_kick_prepare(vq->vq); |
| 481 | spin_unlock_irqrestore(&vq->vq_lock, flags); |
| 482 | |
| 483 | if (needs_kick) |
| 484 | virtqueue_notify(vq->vq); |
| 485 | } |
| 486 | |
| 487 | /** |
| 488 | * virtscsi_add_cmd - add a virtio_scsi_cmd to a virtqueue, optionally kick it |
| 489 | * @vq : the struct virtqueue we're talking about |
| 490 | * @cmd : command structure |
| 491 | * @req_size : size of the request buffer |
| 492 | * @resp_size : size of the response buffer |
| 493 | * @kick : whether to kick the virtqueue immediately |
| 494 | */ |
| 495 | static int virtscsi_add_cmd(struct virtio_scsi_vq *vq, |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 496 | struct virtio_scsi_cmd *cmd, |
Paolo Bonzini | 9e5470f | 2019-05-30 13:28:11 +0200 | [diff] [blame] | 497 | size_t req_size, size_t resp_size, |
| 498 | bool kick) |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 499 | { |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 500 | unsigned long flags; |
Rusty Russell | 4614e51 | 2012-10-16 23:56:16 +1030 | [diff] [blame] | 501 | int err; |
| 502 | bool needs_kick = false; |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 503 | |
Wanlong Gao | 682993b | 2013-03-20 15:44:28 +1030 | [diff] [blame] | 504 | spin_lock_irqsave(&vq->vq_lock, flags); |
Paolo Bonzini | 9e5470f | 2019-05-30 13:28:11 +0200 | [diff] [blame] | 505 | err = __virtscsi_add_cmd(vq->vq, cmd, req_size, resp_size); |
| 506 | if (!err && kick) |
Rusty Russell | 4614e51 | 2012-10-16 23:56:16 +1030 | [diff] [blame] | 507 | needs_kick = virtqueue_kick_prepare(vq->vq); |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 508 | |
Paolo Bonzini | bce750b | 2012-06-13 16:56:33 +0200 | [diff] [blame] | 509 | spin_unlock_irqrestore(&vq->vq_lock, flags); |
Paolo Bonzini | 139fe45 | 2012-06-13 16:56:32 +0200 | [diff] [blame] | 510 | |
Rusty Russell | 4614e51 | 2012-10-16 23:56:16 +1030 | [diff] [blame] | 511 | if (needs_kick) |
Paolo Bonzini | 139fe45 | 2012-06-13 16:56:32 +0200 | [diff] [blame] | 512 | virtqueue_notify(vq->vq); |
Rusty Russell | 4614e51 | 2012-10-16 23:56:16 +1030 | [diff] [blame] | 513 | return err; |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 514 | } |
| 515 | |
Michael S. Tsirkin | d75dff3 | 2014-11-23 17:28:57 +0200 | [diff] [blame] | 516 | static void virtio_scsi_init_hdr(struct virtio_device *vdev, |
| 517 | struct virtio_scsi_cmd_req *cmd, |
Nicholas Bellinger | e6dc783a | 2014-02-22 18:23:33 -0800 | [diff] [blame] | 518 | struct scsi_cmnd *sc) |
| 519 | { |
| 520 | cmd->lun[0] = 1; |
| 521 | cmd->lun[1] = sc->device->id; |
| 522 | cmd->lun[2] = (sc->device->lun >> 8) | 0x40; |
| 523 | cmd->lun[3] = sc->device->lun & 0xff; |
Michael S. Tsirkin | d75dff3 | 2014-11-23 17:28:57 +0200 | [diff] [blame] | 524 | cmd->tag = cpu_to_virtio64(vdev, (unsigned long)sc); |
Nicholas Bellinger | e6dc783a | 2014-02-22 18:23:33 -0800 | [diff] [blame] | 525 | cmd->task_attr = VIRTIO_SCSI_S_SIMPLE; |
| 526 | cmd->prio = 0; |
| 527 | cmd->crn = 0; |
| 528 | } |
| 529 | |
Christoph Hellwig | c5c2567 | 2015-04-27 14:56:14 +0200 | [diff] [blame] | 530 | #ifdef CONFIG_BLK_DEV_INTEGRITY |
Michael S. Tsirkin | d75dff3 | 2014-11-23 17:28:57 +0200 | [diff] [blame] | 531 | static void virtio_scsi_init_hdr_pi(struct virtio_device *vdev, |
| 532 | struct virtio_scsi_cmd_req_pi *cmd_pi, |
Nicholas Bellinger | e6dc783a | 2014-02-22 18:23:33 -0800 | [diff] [blame] | 533 | struct scsi_cmnd *sc) |
| 534 | { |
Bart Van Assche | 7cc4554 | 2021-08-09 16:03:51 -0700 | [diff] [blame] | 535 | struct request *rq = scsi_cmd_to_rq(sc); |
Nicholas Bellinger | e6dc783a | 2014-02-22 18:23:33 -0800 | [diff] [blame] | 536 | struct blk_integrity *bi; |
| 537 | |
Michael S. Tsirkin | d75dff3 | 2014-11-23 17:28:57 +0200 | [diff] [blame] | 538 | virtio_scsi_init_hdr(vdev, (struct virtio_scsi_cmd_req *)cmd_pi, sc); |
Nicholas Bellinger | e6dc783a | 2014-02-22 18:23:33 -0800 | [diff] [blame] | 539 | |
| 540 | if (!rq || !scsi_prot_sg_count(sc)) |
| 541 | return; |
| 542 | |
Christoph Hellwig | f3fa33a | 2021-11-26 13:18:00 +0100 | [diff] [blame] | 543 | bi = blk_get_integrity(rq->q->disk); |
Nicholas Bellinger | e6dc783a | 2014-02-22 18:23:33 -0800 | [diff] [blame] | 544 | |
| 545 | if (sc->sc_data_direction == DMA_TO_DEVICE) |
Michael S. Tsirkin | d75dff3 | 2014-11-23 17:28:57 +0200 | [diff] [blame] | 546 | cmd_pi->pi_bytesout = cpu_to_virtio32(vdev, |
Greg Edwards | cdcdcaa | 2018-07-26 15:52:54 -0400 | [diff] [blame] | 547 | bio_integrity_bytes(bi, |
| 548 | blk_rq_sectors(rq))); |
Nicholas Bellinger | e6dc783a | 2014-02-22 18:23:33 -0800 | [diff] [blame] | 549 | else if (sc->sc_data_direction == DMA_FROM_DEVICE) |
Michael S. Tsirkin | d75dff3 | 2014-11-23 17:28:57 +0200 | [diff] [blame] | 550 | cmd_pi->pi_bytesin = cpu_to_virtio32(vdev, |
Greg Edwards | cdcdcaa | 2018-07-26 15:52:54 -0400 | [diff] [blame] | 551 | bio_integrity_bytes(bi, |
| 552 | blk_rq_sectors(rq))); |
Nicholas Bellinger | e6dc783a | 2014-02-22 18:23:33 -0800 | [diff] [blame] | 553 | } |
Christoph Hellwig | c5c2567 | 2015-04-27 14:56:14 +0200 | [diff] [blame] | 554 | #endif |
Nicholas Bellinger | e6dc783a | 2014-02-22 18:23:33 -0800 | [diff] [blame] | 555 | |
Ming Lei | c3506df | 2018-03-13 17:42:43 +0800 | [diff] [blame] | 556 | static struct virtio_scsi_vq *virtscsi_pick_vq_mq(struct virtio_scsi *vscsi, |
| 557 | struct scsi_cmnd *sc) |
| 558 | { |
Bart Van Assche | 7cc4554 | 2021-08-09 16:03:51 -0700 | [diff] [blame] | 559 | u32 tag = blk_mq_unique_tag(scsi_cmd_to_rq(sc)); |
Ming Lei | c3506df | 2018-03-13 17:42:43 +0800 | [diff] [blame] | 560 | u16 hwq = blk_mq_unique_tag_to_hwq(tag); |
| 561 | |
| 562 | return &vscsi->req_vqs[hwq]; |
| 563 | } |
| 564 | |
| 565 | static int virtscsi_queuecommand(struct Scsi_Host *shost, |
Paolo Bonzini | 9141a4c | 2013-04-08 23:03:25 +0930 | [diff] [blame] | 566 | struct scsi_cmnd *sc) |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 567 | { |
Ming Lei | c3506df | 2018-03-13 17:42:43 +0800 | [diff] [blame] | 568 | struct virtio_scsi *vscsi = shost_priv(shost); |
| 569 | struct virtio_scsi_vq *req_vq = virtscsi_pick_vq_mq(vscsi, sc); |
Christoph Hellwig | b54197c | 2014-05-01 16:51:50 +0200 | [diff] [blame] | 570 | struct virtio_scsi_cmd *cmd = scsi_cmd_priv(sc); |
Paolo Bonzini | 9e5470f | 2019-05-30 13:28:11 +0200 | [diff] [blame] | 571 | bool kick; |
Eric Farman | 773c722 | 2017-01-13 12:48:06 -0500 | [diff] [blame] | 572 | unsigned long flags; |
Linus Torvalds | ed9ea4e | 2014-06-12 22:38:32 -0700 | [diff] [blame] | 573 | int req_size; |
Eric Farman | 773c722 | 2017-01-13 12:48:06 -0500 | [diff] [blame] | 574 | int ret; |
Christoph Hellwig | b54197c | 2014-05-01 16:51:50 +0200 | [diff] [blame] | 575 | |
Paolo Bonzini | 2bd37f0 | 2012-06-13 16:56:34 +0200 | [diff] [blame] | 576 | BUG_ON(scsi_sg_count(sc) > shost->sg_tablesize); |
| 577 | |
| 578 | /* TODO: check feature bit and fail if unsupported? */ |
| 579 | BUG_ON(sc->sc_data_direction == DMA_BIDIRECTIONAL); |
| 580 | |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 581 | dev_dbg(&sc->device->sdev_gendev, |
| 582 | "cmd %p CDB: %#02x\n", sc, sc->cmnd[0]); |
| 583 | |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 584 | cmd->sc = sc; |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 585 | |
| 586 | BUG_ON(sc->cmd_len > VIRTIO_SCSI_CDB_SIZE); |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 587 | |
Christoph Hellwig | c5c2567 | 2015-04-27 14:56:14 +0200 | [diff] [blame] | 588 | #ifdef CONFIG_BLK_DEV_INTEGRITY |
Nicholas Bellinger | e6dc783a | 2014-02-22 18:23:33 -0800 | [diff] [blame] | 589 | if (virtio_has_feature(vscsi->vdev, VIRTIO_SCSI_F_T10_PI)) { |
Michael S. Tsirkin | d75dff3 | 2014-11-23 17:28:57 +0200 | [diff] [blame] | 590 | virtio_scsi_init_hdr_pi(vscsi->vdev, &cmd->req.cmd_pi, sc); |
Nicholas Bellinger | e6dc783a | 2014-02-22 18:23:33 -0800 | [diff] [blame] | 591 | memcpy(cmd->req.cmd_pi.cdb, sc->cmnd, sc->cmd_len); |
| 592 | req_size = sizeof(cmd->req.cmd_pi); |
Christoph Hellwig | c5c2567 | 2015-04-27 14:56:14 +0200 | [diff] [blame] | 593 | } else |
| 594 | #endif |
| 595 | { |
Michael S. Tsirkin | d75dff3 | 2014-11-23 17:28:57 +0200 | [diff] [blame] | 596 | virtio_scsi_init_hdr(vscsi->vdev, &cmd->req.cmd, sc); |
Nicholas Bellinger | e6dc783a | 2014-02-22 18:23:33 -0800 | [diff] [blame] | 597 | memcpy(cmd->req.cmd.cdb, sc->cmnd, sc->cmd_len); |
| 598 | req_size = sizeof(cmd->req.cmd); |
| 599 | } |
| 600 | |
Paolo Bonzini | 9e5470f | 2019-05-30 13:28:11 +0200 | [diff] [blame] | 601 | kick = (sc->flags & SCMD_LAST) != 0; |
| 602 | ret = virtscsi_add_cmd(req_vq, cmd, req_size, sizeof(cmd->resp.cmd), kick); |
Eric Farman | 773c722 | 2017-01-13 12:48:06 -0500 | [diff] [blame] | 603 | if (ret == -EIO) { |
| 604 | cmd->resp.cmd.response = VIRTIO_SCSI_S_BAD_TARGET; |
| 605 | spin_lock_irqsave(&req_vq->vq_lock, flags); |
| 606 | virtscsi_complete_cmd(vscsi, cmd); |
| 607 | spin_unlock_irqrestore(&req_vq->vq_lock, flags); |
| 608 | } else if (ret != 0) { |
Christoph Hellwig | b54197c | 2014-05-01 16:51:50 +0200 | [diff] [blame] | 609 | return SCSI_MLQUEUE_HOST_BUSY; |
Eric Farman | 773c722 | 2017-01-13 12:48:06 -0500 | [diff] [blame] | 610 | } |
Christoph Hellwig | b54197c | 2014-05-01 16:51:50 +0200 | [diff] [blame] | 611 | return 0; |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 612 | } |
| 613 | |
| 614 | static int virtscsi_tmf(struct virtio_scsi *vscsi, struct virtio_scsi_cmd *cmd) |
| 615 | { |
| 616 | DECLARE_COMPLETION_ONSTACK(comp); |
Paolo Bonzini | e4594bb | 2012-05-04 12:32:04 +0200 | [diff] [blame] | 617 | int ret = FAILED; |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 618 | |
| 619 | cmd->comp = ∁ |
Paolo Bonzini | 9e5470f | 2019-05-30 13:28:11 +0200 | [diff] [blame] | 620 | if (virtscsi_add_cmd(&vscsi->ctrl_vq, cmd, |
| 621 | sizeof cmd->req.tmf, sizeof cmd->resp.tmf, true) < 0) |
Paolo Bonzini | e4594bb | 2012-05-04 12:32:04 +0200 | [diff] [blame] | 622 | goto out; |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 623 | |
| 624 | wait_for_completion(&comp); |
Paolo Bonzini | e4594bb | 2012-05-04 12:32:04 +0200 | [diff] [blame] | 625 | if (cmd->resp.tmf.response == VIRTIO_SCSI_S_OK || |
| 626 | cmd->resp.tmf.response == VIRTIO_SCSI_S_FUNCTION_SUCCEEDED) |
| 627 | ret = SUCCESS; |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 628 | |
Paolo Bonzini | 8faeb52 | 2014-06-04 13:34:58 +0200 | [diff] [blame] | 629 | /* |
| 630 | * The spec guarantees that all requests related to the TMF have |
| 631 | * been completed, but the callback might not have run yet if |
| 632 | * we're using independent interrupts (e.g. MSI). Poll the |
| 633 | * virtqueues once. |
| 634 | * |
Bart Van Assche | b4194fc | 2021-10-07 13:46:02 -0700 | [diff] [blame] | 635 | * In the abort case, scsi_done() will do nothing, because the |
| 636 | * command timed out and hence SCMD_STATE_COMPLETE has been set. |
Paolo Bonzini | 8faeb52 | 2014-06-04 13:34:58 +0200 | [diff] [blame] | 637 | */ |
| 638 | virtscsi_poll_requests(vscsi); |
| 639 | |
Paolo Bonzini | e4594bb | 2012-05-04 12:32:04 +0200 | [diff] [blame] | 640 | out: |
| 641 | mempool_free(cmd, virtscsi_cmd_pool); |
| 642 | return ret; |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 643 | } |
| 644 | |
| 645 | static int virtscsi_device_reset(struct scsi_cmnd *sc) |
| 646 | { |
| 647 | struct virtio_scsi *vscsi = shost_priv(sc->device->host); |
| 648 | struct virtio_scsi_cmd *cmd; |
| 649 | |
| 650 | sdev_printk(KERN_INFO, sc->device, "device reset\n"); |
| 651 | cmd = mempool_alloc(virtscsi_cmd_pool, GFP_NOIO); |
| 652 | if (!cmd) |
| 653 | return FAILED; |
| 654 | |
| 655 | memset(cmd, 0, sizeof(*cmd)); |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 656 | cmd->req.tmf = (struct virtio_scsi_ctrl_tmf_req){ |
| 657 | .type = VIRTIO_SCSI_T_TMF, |
Michael S. Tsirkin | d75dff3 | 2014-11-23 17:28:57 +0200 | [diff] [blame] | 658 | .subtype = cpu_to_virtio32(vscsi->vdev, |
| 659 | VIRTIO_SCSI_T_TMF_LOGICAL_UNIT_RESET), |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 660 | .lun[0] = 1, |
| 661 | .lun[1] = sc->device->id, |
| 662 | .lun[2] = (sc->device->lun >> 8) | 0x40, |
| 663 | .lun[3] = sc->device->lun & 0xff, |
| 664 | }; |
| 665 | return virtscsi_tmf(vscsi, cmd); |
| 666 | } |
| 667 | |
David Gibson | 25d1d50 | 2017-04-13 12:13:00 +1000 | [diff] [blame] | 668 | static int virtscsi_device_alloc(struct scsi_device *sdevice) |
| 669 | { |
| 670 | /* |
| 671 | * Passed through SCSI targets (e.g. with qemu's 'scsi-block') |
| 672 | * may have transfer limits which come from the host SCSI |
| 673 | * controller or something on the host side other than the |
| 674 | * target itself. |
| 675 | * |
| 676 | * To make this work properly, the hypervisor can adjust the |
| 677 | * target's VPD information to advertise these limits. But |
| 678 | * for that to work, the guest has to look at the VPD pages, |
| 679 | * which we won't do by default if it is an SPC-2 device, even |
| 680 | * if it does actually support it. |
| 681 | * |
| 682 | * So, set the blist to always try to read the VPD pages. |
| 683 | */ |
| 684 | sdevice->sdev_bflags = BLIST_TRY_VPD_PAGES; |
| 685 | |
| 686 | return 0; |
| 687 | } |
| 688 | |
| 689 | |
Venkatesh Srinivas | 761f119 | 2014-07-06 16:39:27 +0200 | [diff] [blame] | 690 | /** |
| 691 | * virtscsi_change_queue_depth() - Change a virtscsi target's queue depth |
| 692 | * @sdev: Virtscsi target whose queue depth to change |
| 693 | * @qdepth: New queue depth |
Venkatesh Srinivas | 761f119 | 2014-07-06 16:39:27 +0200 | [diff] [blame] | 694 | */ |
Christoph Hellwig | db5ed4d | 2014-11-13 15:08:42 +0100 | [diff] [blame] | 695 | static int virtscsi_change_queue_depth(struct scsi_device *sdev, int qdepth) |
Venkatesh Srinivas | 761f119 | 2014-07-06 16:39:27 +0200 | [diff] [blame] | 696 | { |
| 697 | struct Scsi_Host *shost = sdev->host; |
| 698 | int max_depth = shost->cmd_per_lun; |
| 699 | |
Christoph Hellwig | db5ed4d | 2014-11-13 15:08:42 +0100 | [diff] [blame] | 700 | return scsi_change_queue_depth(sdev, min(max_depth, qdepth)); |
Venkatesh Srinivas | 761f119 | 2014-07-06 16:39:27 +0200 | [diff] [blame] | 701 | } |
| 702 | |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 703 | static int virtscsi_abort(struct scsi_cmnd *sc) |
| 704 | { |
| 705 | struct virtio_scsi *vscsi = shost_priv(sc->device->host); |
| 706 | struct virtio_scsi_cmd *cmd; |
| 707 | |
| 708 | scmd_printk(KERN_INFO, sc, "abort\n"); |
| 709 | cmd = mempool_alloc(virtscsi_cmd_pool, GFP_NOIO); |
| 710 | if (!cmd) |
| 711 | return FAILED; |
| 712 | |
| 713 | memset(cmd, 0, sizeof(*cmd)); |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 714 | cmd->req.tmf = (struct virtio_scsi_ctrl_tmf_req){ |
| 715 | .type = VIRTIO_SCSI_T_TMF, |
| 716 | .subtype = VIRTIO_SCSI_T_TMF_ABORT_TASK, |
| 717 | .lun[0] = 1, |
| 718 | .lun[1] = sc->device->id, |
| 719 | .lun[2] = (sc->device->lun >> 8) | 0x40, |
| 720 | .lun[3] = sc->device->lun & 0xff, |
Michael S. Tsirkin | d75dff3 | 2014-11-23 17:28:57 +0200 | [diff] [blame] | 721 | .tag = cpu_to_virtio64(vscsi->vdev, (unsigned long)sc), |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 722 | }; |
| 723 | return virtscsi_tmf(vscsi, cmd); |
| 724 | } |
| 725 | |
Bart Van Assche | a4e1d0b | 2022-08-15 10:00:43 -0700 | [diff] [blame] | 726 | static void virtscsi_map_queues(struct Scsi_Host *shost) |
Christoph Hellwig | 0d9f0a5 | 2017-02-05 18:15:26 +0100 | [diff] [blame] | 727 | { |
| 728 | struct virtio_scsi *vscsi = shost_priv(shost); |
Mike Christie | 95e72496 | 2023-12-13 23:26:49 -0600 | [diff] [blame] | 729 | int i, qoff; |
Christoph Hellwig | 0d9f0a5 | 2017-02-05 18:15:26 +0100 | [diff] [blame] | 730 | |
Mike Christie | 95e72496 | 2023-12-13 23:26:49 -0600 | [diff] [blame] | 731 | for (i = 0, qoff = 0; i < shost->nr_maps; i++) { |
| 732 | struct blk_mq_queue_map *map = &shost->tag_set.map[i]; |
| 733 | |
| 734 | map->nr_queues = vscsi->io_queues[i]; |
| 735 | map->queue_offset = qoff; |
| 736 | qoff += map->nr_queues; |
| 737 | |
| 738 | if (map->nr_queues == 0) |
| 739 | continue; |
| 740 | |
| 741 | /* |
| 742 | * Regular queues have interrupts and hence CPU affinity is |
| 743 | * defined by the core virtio code, but polling queues have |
| 744 | * no interrupts so we let the block layer assign CPU affinity. |
| 745 | */ |
| 746 | if (i == HCTX_TYPE_POLL) |
| 747 | blk_mq_map_queues(map); |
| 748 | else |
| 749 | blk_mq_virtio_map_queues(map, vscsi->vdev, 2); |
| 750 | } |
| 751 | } |
| 752 | |
| 753 | static int virtscsi_mq_poll(struct Scsi_Host *shost, unsigned int queue_num) |
| 754 | { |
| 755 | struct virtio_scsi *vscsi = shost_priv(shost); |
| 756 | struct virtio_scsi_vq *virtscsi_vq = &vscsi->req_vqs[queue_num]; |
| 757 | unsigned long flags; |
| 758 | unsigned int len; |
| 759 | int found = 0; |
| 760 | void *buf; |
| 761 | |
| 762 | spin_lock_irqsave(&virtscsi_vq->vq_lock, flags); |
| 763 | |
| 764 | while ((buf = virtqueue_get_buf(virtscsi_vq->vq, &len)) != NULL) { |
| 765 | virtscsi_complete_cmd(vscsi, buf); |
| 766 | found++; |
| 767 | } |
| 768 | |
| 769 | spin_unlock_irqrestore(&virtscsi_vq->vq_lock, flags); |
| 770 | |
| 771 | return found; |
Christoph Hellwig | 0d9f0a5 | 2017-02-05 18:15:26 +0100 | [diff] [blame] | 772 | } |
| 773 | |
Paolo Bonzini | 9e5470f | 2019-05-30 13:28:11 +0200 | [diff] [blame] | 774 | static void virtscsi_commit_rqs(struct Scsi_Host *shost, u16 hwq) |
| 775 | { |
| 776 | struct virtio_scsi *vscsi = shost_priv(shost); |
| 777 | |
| 778 | virtscsi_kick_vq(&vscsi->req_vqs[hwq]); |
| 779 | } |
| 780 | |
Paolo Bonzini | e72c9a2 | 2017-06-21 16:35:46 +0200 | [diff] [blame] | 781 | /* |
| 782 | * The host guarantees to respond to each command, although I/O |
| 783 | * latencies might be higher than on bare metal. Reset the timer |
| 784 | * unconditionally to give the host a chance to perform EH. |
| 785 | */ |
Bart Van Assche | dee7121 | 2022-10-18 13:29:50 -0700 | [diff] [blame] | 786 | static enum scsi_timeout_action virtscsi_eh_timed_out(struct scsi_cmnd *scmnd) |
Paolo Bonzini | e72c9a2 | 2017-06-21 16:35:46 +0200 | [diff] [blame] | 787 | { |
Bart Van Assche | dee7121 | 2022-10-18 13:29:50 -0700 | [diff] [blame] | 788 | return SCSI_EH_RESET_TIMER; |
Paolo Bonzini | e72c9a2 | 2017-06-21 16:35:46 +0200 | [diff] [blame] | 789 | } |
| 790 | |
Bart Van Assche | 273ab25 | 2023-03-22 12:55:09 -0700 | [diff] [blame] | 791 | static const struct scsi_host_template virtscsi_host_template = { |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 792 | .module = THIS_MODULE, |
| 793 | .name = "Virtio SCSI HBA", |
| 794 | .proc_name = "virtio_scsi", |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 795 | .this_id = -1, |
Christoph Hellwig | b54197c | 2014-05-01 16:51:50 +0200 | [diff] [blame] | 796 | .cmd_size = sizeof(struct virtio_scsi_cmd), |
Ming Lei | c3506df | 2018-03-13 17:42:43 +0800 | [diff] [blame] | 797 | .queuecommand = virtscsi_queuecommand, |
Mike Christie | 95e72496 | 2023-12-13 23:26:49 -0600 | [diff] [blame] | 798 | .mq_poll = virtscsi_mq_poll, |
Paolo Bonzini | 9e5470f | 2019-05-30 13:28:11 +0200 | [diff] [blame] | 799 | .commit_rqs = virtscsi_commit_rqs, |
Venkatesh Srinivas | 761f119 | 2014-07-06 16:39:27 +0200 | [diff] [blame] | 800 | .change_queue_depth = virtscsi_change_queue_depth, |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 801 | .eh_abort_handler = virtscsi_abort, |
| 802 | .eh_device_reset_handler = virtscsi_device_reset, |
Paolo Bonzini | e72c9a2 | 2017-06-21 16:35:46 +0200 | [diff] [blame] | 803 | .eh_timed_out = virtscsi_eh_timed_out, |
Paolo Bonzini | a680f1d | 2017-07-05 10:30:56 +0200 | [diff] [blame] | 804 | .slave_alloc = virtscsi_device_alloc, |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 805 | |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 806 | .dma_boundary = UINT_MAX, |
Christoph Hellwig | 0d9f0a5 | 2017-02-05 18:15:26 +0100 | [diff] [blame] | 807 | .map_queues = virtscsi_map_queues, |
Christoph Hellwig | c40ecc1 | 2014-11-13 14:25:11 +0100 | [diff] [blame] | 808 | .track_queue_depth = 1, |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 809 | }; |
| 810 | |
| 811 | #define virtscsi_config_get(vdev, fld) \ |
| 812 | ({ \ |
Michael S. Tsirkin | 965b535 | 2020-07-10 07:17:13 -0400 | [diff] [blame] | 813 | __virtio_native_type(struct virtio_scsi_config, fld) __val; \ |
Rusty Russell | 855e0c5 | 2013-10-14 18:11:51 +1030 | [diff] [blame] | 814 | virtio_cread(vdev, struct virtio_scsi_config, fld, &__val); \ |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 815 | __val; \ |
| 816 | }) |
| 817 | |
| 818 | #define virtscsi_config_set(vdev, fld, val) \ |
Rusty Russell | 855e0c5 | 2013-10-14 18:11:51 +1030 | [diff] [blame] | 819 | do { \ |
Michael S. Tsirkin | 965b535 | 2020-07-10 07:17:13 -0400 | [diff] [blame] | 820 | __virtio_native_type(struct virtio_scsi_config, fld) __val = (val); \ |
Rusty Russell | 855e0c5 | 2013-10-14 18:11:51 +1030 | [diff] [blame] | 821 | virtio_cwrite(vdev, struct virtio_scsi_config, fld, &__val); \ |
| 822 | } while(0) |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 823 | |
Paolo Bonzini | 139fe45 | 2012-06-13 16:56:32 +0200 | [diff] [blame] | 824 | static void virtscsi_init_vq(struct virtio_scsi_vq *virtscsi_vq, |
| 825 | struct virtqueue *vq) |
| 826 | { |
| 827 | spin_lock_init(&virtscsi_vq->vq_lock); |
| 828 | virtscsi_vq->vq = vq; |
| 829 | } |
| 830 | |
Paolo Bonzini | 2bd37f0 | 2012-06-13 16:56:34 +0200 | [diff] [blame] | 831 | static void virtscsi_remove_vqs(struct virtio_device *vdev) |
| 832 | { |
Paolo Bonzini | 2bd37f0 | 2012-06-13 16:56:34 +0200 | [diff] [blame] | 833 | /* Stop all the virtqueues. */ |
Michael S. Tsirkin | d9679d0 | 2021-10-13 06:55:44 -0400 | [diff] [blame] | 834 | virtio_reset_device(vdev); |
Paolo Bonzini | 2bd37f0 | 2012-06-13 16:56:34 +0200 | [diff] [blame] | 835 | vdev->config->del_vqs(vdev); |
| 836 | } |
| 837 | |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 838 | static int virtscsi_init(struct virtio_device *vdev, |
Wanlong Gao | 5c37019 | 2013-04-08 23:01:16 +0930 | [diff] [blame] | 839 | struct virtio_scsi *vscsi) |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 840 | { |
| 841 | int err; |
Paolo Bonzini | 9141a4c | 2013-04-08 23:03:25 +0930 | [diff] [blame] | 842 | u32 i; |
Mike Christie | 95e72496 | 2023-12-13 23:26:49 -0600 | [diff] [blame] | 843 | u32 num_vqs, num_poll_vqs, num_req_vqs; |
Jiri Pirko | a6da214 | 2024-07-08 09:48:09 +0200 | [diff] [blame] | 844 | struct virtqueue_info *vqs_info; |
Paolo Bonzini | 9141a4c | 2013-04-08 23:03:25 +0930 | [diff] [blame] | 845 | struct virtqueue **vqs; |
Christoph Hellwig | 0d9f0a5 | 2017-02-05 18:15:26 +0100 | [diff] [blame] | 846 | struct irq_affinity desc = { .pre_vectors = 2 }; |
Paolo Bonzini | 2bd37f0 | 2012-06-13 16:56:34 +0200 | [diff] [blame] | 847 | |
Mike Christie | 95e72496 | 2023-12-13 23:26:49 -0600 | [diff] [blame] | 848 | num_req_vqs = vscsi->num_queues; |
| 849 | num_vqs = num_req_vqs + VIRTIO_SCSI_VQ_BASE; |
Kees Cook | 6da2ec5 | 2018-06-12 13:55:00 -0700 | [diff] [blame] | 850 | vqs = kmalloc_array(num_vqs, sizeof(struct virtqueue *), GFP_KERNEL); |
Jiri Pirko | a6da214 | 2024-07-08 09:48:09 +0200 | [diff] [blame] | 851 | vqs_info = kcalloc(num_vqs, sizeof(*vqs_info), GFP_KERNEL); |
Paolo Bonzini | 9141a4c | 2013-04-08 23:03:25 +0930 | [diff] [blame] | 852 | |
Jiri Pirko | a6da214 | 2024-07-08 09:48:09 +0200 | [diff] [blame] | 853 | if (!vqs || !vqs_info) { |
Paolo Bonzini | 9141a4c | 2013-04-08 23:03:25 +0930 | [diff] [blame] | 854 | err = -ENOMEM; |
| 855 | goto out; |
| 856 | } |
| 857 | |
Mike Christie | 95e72496 | 2023-12-13 23:26:49 -0600 | [diff] [blame] | 858 | num_poll_vqs = min_t(unsigned int, virtscsi_poll_queues, |
| 859 | num_req_vqs - 1); |
| 860 | vscsi->io_queues[HCTX_TYPE_DEFAULT] = num_req_vqs - num_poll_vqs; |
| 861 | vscsi->io_queues[HCTX_TYPE_READ] = 0; |
| 862 | vscsi->io_queues[HCTX_TYPE_POLL] = num_poll_vqs; |
| 863 | |
| 864 | dev_info(&vdev->dev, "%d/%d/%d default/read/poll queues\n", |
| 865 | vscsi->io_queues[HCTX_TYPE_DEFAULT], |
| 866 | vscsi->io_queues[HCTX_TYPE_READ], |
| 867 | vscsi->io_queues[HCTX_TYPE_POLL]); |
| 868 | |
Jiri Pirko | a6da214 | 2024-07-08 09:48:09 +0200 | [diff] [blame] | 869 | vqs_info[0].callback = virtscsi_ctrl_done; |
| 870 | vqs_info[0].name = "control"; |
| 871 | vqs_info[1].callback = virtscsi_event_done; |
| 872 | vqs_info[1].name = "event"; |
Mike Christie | 95e72496 | 2023-12-13 23:26:49 -0600 | [diff] [blame] | 873 | for (i = VIRTIO_SCSI_VQ_BASE; i < num_vqs - num_poll_vqs; i++) { |
Jiri Pirko | a6da214 | 2024-07-08 09:48:09 +0200 | [diff] [blame] | 874 | vqs_info[i].callback = virtscsi_req_done; |
| 875 | vqs_info[i].name = "request"; |
Paolo Bonzini | 9141a4c | 2013-04-08 23:03:25 +0930 | [diff] [blame] | 876 | } |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 877 | |
Jiri Pirko | a6da214 | 2024-07-08 09:48:09 +0200 | [diff] [blame] | 878 | for (; i < num_vqs; i++) |
| 879 | vqs_info[i].name = "request_poll"; |
Mike Christie | 95e72496 | 2023-12-13 23:26:49 -0600 | [diff] [blame] | 880 | |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 881 | /* Discover virtqueues and write information to configuration. */ |
Jiri Pirko | 6c85d6b | 2024-07-08 09:48:14 +0200 | [diff] [blame] | 882 | err = virtio_find_vqs(vdev, num_vqs, vqs, vqs_info, &desc); |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 883 | if (err) |
Paolo Bonzini | 9141a4c | 2013-04-08 23:03:25 +0930 | [diff] [blame] | 884 | goto out; |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 885 | |
Paolo Bonzini | 139fe45 | 2012-06-13 16:56:32 +0200 | [diff] [blame] | 886 | virtscsi_init_vq(&vscsi->ctrl_vq, vqs[0]); |
| 887 | virtscsi_init_vq(&vscsi->event_vq, vqs[1]); |
Paolo Bonzini | 9141a4c | 2013-04-08 23:03:25 +0930 | [diff] [blame] | 888 | for (i = VIRTIO_SCSI_VQ_BASE; i < num_vqs; i++) |
| 889 | virtscsi_init_vq(&vscsi->req_vqs[i - VIRTIO_SCSI_VQ_BASE], |
| 890 | vqs[i]); |
| 891 | |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 892 | virtscsi_config_set(vdev, cdb_size, VIRTIO_SCSI_CDB_SIZE); |
| 893 | virtscsi_config_set(vdev, sense_size, VIRTIO_SCSI_SENSE_SIZE); |
Paolo Bonzini | 2bd37f0 | 2012-06-13 16:56:34 +0200 | [diff] [blame] | 894 | |
Paolo Bonzini | 9141a4c | 2013-04-08 23:03:25 +0930 | [diff] [blame] | 895 | err = 0; |
| 896 | |
| 897 | out: |
Jiri Pirko | a6da214 | 2024-07-08 09:48:09 +0200 | [diff] [blame] | 898 | kfree(vqs_info); |
Paolo Bonzini | 9141a4c | 2013-04-08 23:03:25 +0930 | [diff] [blame] | 899 | kfree(vqs); |
| 900 | if (err) |
| 901 | virtscsi_remove_vqs(vdev); |
Paolo Bonzini | 2bd37f0 | 2012-06-13 16:56:34 +0200 | [diff] [blame] | 902 | return err; |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 903 | } |
| 904 | |
Greg Kroah-Hartman | 6f03979 | 2012-12-21 13:08:55 -0800 | [diff] [blame] | 905 | static int virtscsi_probe(struct virtio_device *vdev) |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 906 | { |
| 907 | struct Scsi_Host *shost; |
| 908 | struct virtio_scsi *vscsi; |
Stephen Rothwell | 908a554 | 2015-06-30 10:59:04 +1000 | [diff] [blame] | 909 | int err; |
Paolo Bonzini | 2bd37f0 | 2012-06-13 16:56:34 +0200 | [diff] [blame] | 910 | u32 sg_elems, num_targets; |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 911 | u32 cmd_per_lun; |
Paolo Bonzini | 9141a4c | 2013-04-08 23:03:25 +0930 | [diff] [blame] | 912 | u32 num_queues; |
Paolo Bonzini | 9141a4c | 2013-04-08 23:03:25 +0930 | [diff] [blame] | 913 | |
Michael S. Tsirkin | 8cab3cd | 2015-01-12 16:23:37 +0200 | [diff] [blame] | 914 | if (!vdev->config->get) { |
| 915 | dev_err(&vdev->dev, "%s failure: config access disabled\n", |
| 916 | __func__); |
| 917 | return -EINVAL; |
| 918 | } |
| 919 | |
Paolo Bonzini | 9141a4c | 2013-04-08 23:03:25 +0930 | [diff] [blame] | 920 | /* We need to know how many queues before we allocate. */ |
| 921 | num_queues = virtscsi_config_get(vdev, num_queues) ? : 1; |
Dongli Zhang | 1978f30 | 2019-03-27 18:36:35 +0800 | [diff] [blame] | 922 | num_queues = min_t(unsigned int, nr_cpu_ids, num_queues); |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 923 | |
Paolo Bonzini | 2bd37f0 | 2012-06-13 16:56:34 +0200 | [diff] [blame] | 924 | num_targets = virtscsi_config_get(vdev, max_target) + 1; |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 925 | |
Ming Lei | c3506df | 2018-03-13 17:42:43 +0800 | [diff] [blame] | 926 | shost = scsi_host_alloc(&virtscsi_host_template, |
Gustavo A. R. Silva | 211f70ff | 2019-06-19 14:28:33 -0500 | [diff] [blame] | 927 | struct_size(vscsi, req_vqs, num_queues)); |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 928 | if (!shost) |
| 929 | return -ENOMEM; |
| 930 | |
Paolo Bonzini | 2bd37f0 | 2012-06-13 16:56:34 +0200 | [diff] [blame] | 931 | sg_elems = virtscsi_config_get(vdev, seg_max) ?: 1; |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 932 | shost->sg_tablesize = sg_elems; |
Mike Christie | 95e72496 | 2023-12-13 23:26:49 -0600 | [diff] [blame] | 933 | shost->nr_maps = 1; |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 934 | vscsi = shost_priv(shost); |
| 935 | vscsi->vdev = vdev; |
Paolo Bonzini | 9141a4c | 2013-04-08 23:03:25 +0930 | [diff] [blame] | 936 | vscsi->num_queues = num_queues; |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 937 | vdev->priv = shost; |
| 938 | |
Wanlong Gao | 5c37019 | 2013-04-08 23:01:16 +0930 | [diff] [blame] | 939 | err = virtscsi_init(vdev, vscsi); |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 940 | if (err) |
| 941 | goto virtscsi_init_failed; |
| 942 | |
Mike Christie | 95e72496 | 2023-12-13 23:26:49 -0600 | [diff] [blame] | 943 | if (vscsi->io_queues[HCTX_TYPE_POLL]) |
| 944 | shost->nr_maps = HCTX_TYPE_POLL + 1; |
| 945 | |
Richard W.M. Jones | 582b0ab | 2017-08-10 17:56:52 +0100 | [diff] [blame] | 946 | shost->can_queue = virtqueue_get_vring_size(vscsi->req_vqs[0].vq); |
| 947 | |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 948 | cmd_per_lun = virtscsi_config_get(vdev, cmd_per_lun) ?: 1; |
| 949 | shost->cmd_per_lun = min_t(u32, cmd_per_lun, shost->can_queue); |
| 950 | shost->max_sectors = virtscsi_config_get(vdev, max_sectors) ?: 0xFFFF; |
Paolo Bonzini | 9da5f5a | 2012-10-02 17:25:47 +0200 | [diff] [blame] | 951 | |
| 952 | /* LUNs > 256 are reported with format 1, so they go in the range |
| 953 | * 16640-32767. |
| 954 | */ |
| 955 | shost->max_lun = virtscsi_config_get(vdev, max_lun) + 1 + 0x4000; |
Paolo Bonzini | 2bd37f0 | 2012-06-13 16:56:34 +0200 | [diff] [blame] | 956 | shost->max_id = num_targets; |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 957 | shost->max_channel = 0; |
| 958 | shost->max_cmd_len = VIRTIO_SCSI_CDB_SIZE; |
Ming Lei | ccbedf1 | 2014-11-15 11:47:14 +0800 | [diff] [blame] | 959 | shost->nr_hw_queues = num_queues; |
Nicholas Bellinger | e6dc783a | 2014-02-22 18:23:33 -0800 | [diff] [blame] | 960 | |
Christoph Hellwig | c5c2567 | 2015-04-27 14:56:14 +0200 | [diff] [blame] | 961 | #ifdef CONFIG_BLK_DEV_INTEGRITY |
Nicholas Bellinger | e6dc783a | 2014-02-22 18:23:33 -0800 | [diff] [blame] | 962 | if (virtio_has_feature(vdev, VIRTIO_SCSI_F_T10_PI)) { |
Stephen Rothwell | 908a554 | 2015-06-30 10:59:04 +1000 | [diff] [blame] | 963 | int host_prot; |
| 964 | |
Nicholas Bellinger | e6dc783a | 2014-02-22 18:23:33 -0800 | [diff] [blame] | 965 | host_prot = SHOST_DIF_TYPE1_PROTECTION | SHOST_DIF_TYPE2_PROTECTION | |
| 966 | SHOST_DIF_TYPE3_PROTECTION | SHOST_DIX_TYPE1_PROTECTION | |
| 967 | SHOST_DIX_TYPE2_PROTECTION | SHOST_DIX_TYPE3_PROTECTION; |
| 968 | |
| 969 | scsi_host_set_prot(shost, host_prot); |
| 970 | scsi_host_set_guard(shost, SHOST_DIX_GUARD_CRC); |
| 971 | } |
Christoph Hellwig | c5c2567 | 2015-04-27 14:56:14 +0200 | [diff] [blame] | 972 | #endif |
Nicholas Bellinger | e6dc783a | 2014-02-22 18:23:33 -0800 | [diff] [blame] | 973 | |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 974 | err = scsi_add_host(shost, &vdev->dev); |
| 975 | if (err) |
| 976 | goto scsi_add_host_failed; |
Michael S. Tsirkin | 5d8f16d | 2014-10-15 10:22:33 +1030 | [diff] [blame] | 977 | |
| 978 | virtio_device_ready(vdev); |
| 979 | |
| 980 | if (virtio_has_feature(vdev, VIRTIO_SCSI_F_HOTPLUG)) |
| 981 | virtscsi_kick_event_all(vscsi); |
| 982 | |
| 983 | scsi_scan_host(shost); |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 984 | return 0; |
| 985 | |
| 986 | scsi_add_host_failed: |
| 987 | vdev->config->del_vqs(vdev); |
| 988 | virtscsi_init_failed: |
| 989 | scsi_host_put(shost); |
| 990 | return err; |
| 991 | } |
| 992 | |
Greg Kroah-Hartman | 6f03979 | 2012-12-21 13:08:55 -0800 | [diff] [blame] | 993 | static void virtscsi_remove(struct virtio_device *vdev) |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 994 | { |
| 995 | struct Scsi_Host *shost = virtio_scsi_host(vdev); |
Cong Meng | 365a715 | 2012-07-05 17:06:43 +0800 | [diff] [blame] | 996 | struct virtio_scsi *vscsi = shost_priv(shost); |
| 997 | |
| 998 | if (virtio_has_feature(vdev, VIRTIO_SCSI_F_HOTPLUG)) |
| 999 | virtscsi_cancel_event_work(vscsi); |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 1000 | |
| 1001 | scsi_remove_host(shost); |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 1002 | virtscsi_remove_vqs(vdev); |
| 1003 | scsi_host_put(shost); |
| 1004 | } |
| 1005 | |
Aaron Lu | 8910700 | 2013-09-17 09:25:23 +0930 | [diff] [blame] | 1006 | #ifdef CONFIG_PM_SLEEP |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 1007 | static int virtscsi_freeze(struct virtio_device *vdev) |
| 1008 | { |
| 1009 | virtscsi_remove_vqs(vdev); |
| 1010 | return 0; |
| 1011 | } |
| 1012 | |
| 1013 | static int virtscsi_restore(struct virtio_device *vdev) |
| 1014 | { |
| 1015 | struct Scsi_Host *sh = virtio_scsi_host(vdev); |
| 1016 | struct virtio_scsi *vscsi = shost_priv(sh); |
Asias He | f466f75 | 2014-01-16 10:18:48 +1030 | [diff] [blame] | 1017 | int err; |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 1018 | |
Asias He | f466f75 | 2014-01-16 10:18:48 +1030 | [diff] [blame] | 1019 | err = virtscsi_init(vdev, vscsi); |
| 1020 | if (err) |
| 1021 | return err; |
| 1022 | |
Michael S. Tsirkin | 52c9cf1 | 2014-10-15 10:22:32 +1030 | [diff] [blame] | 1023 | virtio_device_ready(vdev); |
| 1024 | |
Michael S. Tsirkin | cd67904 | 2014-10-15 10:22:31 +1030 | [diff] [blame] | 1025 | if (virtio_has_feature(vdev, VIRTIO_SCSI_F_HOTPLUG)) |
| 1026 | virtscsi_kick_event_all(vscsi); |
Asias He | f466f75 | 2014-01-16 10:18:48 +1030 | [diff] [blame] | 1027 | |
| 1028 | return err; |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 1029 | } |
| 1030 | #endif |
| 1031 | |
| 1032 | static struct virtio_device_id id_table[] = { |
| 1033 | { VIRTIO_ID_SCSI, VIRTIO_DEV_ANY_ID }, |
| 1034 | { 0 }, |
| 1035 | }; |
| 1036 | |
Cong Meng | 365a715 | 2012-07-05 17:06:43 +0800 | [diff] [blame] | 1037 | static unsigned int features[] = { |
Paolo Bonzini | 865b58c | 2012-10-02 17:25:48 +0200 | [diff] [blame] | 1038 | VIRTIO_SCSI_F_HOTPLUG, |
| 1039 | VIRTIO_SCSI_F_CHANGE, |
Christoph Hellwig | c5c2567 | 2015-04-27 14:56:14 +0200 | [diff] [blame] | 1040 | #ifdef CONFIG_BLK_DEV_INTEGRITY |
Nicholas Bellinger | e6dc783a | 2014-02-22 18:23:33 -0800 | [diff] [blame] | 1041 | VIRTIO_SCSI_F_T10_PI, |
Christoph Hellwig | c5c2567 | 2015-04-27 14:56:14 +0200 | [diff] [blame] | 1042 | #endif |
Cong Meng | 365a715 | 2012-07-05 17:06:43 +0800 | [diff] [blame] | 1043 | }; |
| 1044 | |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 1045 | static struct virtio_driver virtio_scsi_driver = { |
Cong Meng | 365a715 | 2012-07-05 17:06:43 +0800 | [diff] [blame] | 1046 | .feature_table = features, |
| 1047 | .feature_table_size = ARRAY_SIZE(features), |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 1048 | .driver.name = KBUILD_MODNAME, |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 1049 | .id_table = id_table, |
| 1050 | .probe = virtscsi_probe, |
Aaron Lu | 8910700 | 2013-09-17 09:25:23 +0930 | [diff] [blame] | 1051 | #ifdef CONFIG_PM_SLEEP |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 1052 | .freeze = virtscsi_freeze, |
| 1053 | .restore = virtscsi_restore, |
| 1054 | #endif |
Greg Kroah-Hartman | 6f03979 | 2012-12-21 13:08:55 -0800 | [diff] [blame] | 1055 | .remove = virtscsi_remove, |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 1056 | }; |
| 1057 | |
Randy Dunlap | 41b8c2a | 2022-03-16 12:20:06 -0700 | [diff] [blame] | 1058 | static int __init virtio_scsi_init(void) |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 1059 | { |
| 1060 | int ret = -ENOMEM; |
| 1061 | |
| 1062 | virtscsi_cmd_cache = KMEM_CACHE(virtio_scsi_cmd, 0); |
| 1063 | if (!virtscsi_cmd_cache) { |
Wanlong Gao | ba06d1e | 2013-03-12 15:34:40 +1030 | [diff] [blame] | 1064 | pr_err("kmem_cache_create() for virtscsi_cmd_cache failed\n"); |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 1065 | goto error; |
| 1066 | } |
| 1067 | |
| 1068 | |
| 1069 | virtscsi_cmd_pool = |
| 1070 | mempool_create_slab_pool(VIRTIO_SCSI_MEMPOOL_SZ, |
| 1071 | virtscsi_cmd_cache); |
| 1072 | if (!virtscsi_cmd_pool) { |
Wanlong Gao | ba06d1e | 2013-03-12 15:34:40 +1030 | [diff] [blame] | 1073 | pr_err("mempool_create() for virtscsi_cmd_pool failed\n"); |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 1074 | goto error; |
| 1075 | } |
| 1076 | ret = register_virtio_driver(&virtio_scsi_driver); |
| 1077 | if (ret < 0) |
| 1078 | goto error; |
| 1079 | |
| 1080 | return 0; |
| 1081 | |
| 1082 | error: |
Xianting Tian | 92e8d03 | 2020-07-09 11:06:07 -0400 | [diff] [blame] | 1083 | mempool_destroy(virtscsi_cmd_pool); |
| 1084 | virtscsi_cmd_pool = NULL; |
| 1085 | kmem_cache_destroy(virtscsi_cmd_cache); |
| 1086 | virtscsi_cmd_cache = NULL; |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 1087 | return ret; |
| 1088 | } |
| 1089 | |
Randy Dunlap | 41b8c2a | 2022-03-16 12:20:06 -0700 | [diff] [blame] | 1090 | static void __exit virtio_scsi_fini(void) |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 1091 | { |
| 1092 | unregister_virtio_driver(&virtio_scsi_driver); |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 1093 | mempool_destroy(virtscsi_cmd_pool); |
| 1094 | kmem_cache_destroy(virtscsi_cmd_cache); |
| 1095 | } |
Randy Dunlap | 41b8c2a | 2022-03-16 12:20:06 -0700 | [diff] [blame] | 1096 | module_init(virtio_scsi_init); |
| 1097 | module_exit(virtio_scsi_fini); |
Paolo Bonzini | 4fe74b1 | 2012-02-05 12:16:00 +0100 | [diff] [blame] | 1098 | |
| 1099 | MODULE_DEVICE_TABLE(virtio, id_table); |
| 1100 | MODULE_DESCRIPTION("Virtio SCSI HBA driver"); |
| 1101 | MODULE_LICENSE("GPL"); |