Christoph Hellwig | 21d3471 | 2015-11-26 09:08:36 +0100 | [diff] [blame] | 1 | /* |
| 2 | * NVM Express device driver |
| 3 | * Copyright (c) 2011-2014, Intel Corporation. |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify it |
| 6 | * under the terms and conditions of the GNU General Public License, |
| 7 | * version 2, as published by the Free Software Foundation. |
| 8 | * |
| 9 | * This program is distributed in the hope it will be useful, but WITHOUT |
| 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 12 | * more details. |
| 13 | */ |
| 14 | |
| 15 | #include <linux/blkdev.h> |
| 16 | #include <linux/blk-mq.h> |
Christoph Hellwig | 5fd4ce1 | 2015-11-28 15:03:49 +0100 | [diff] [blame] | 17 | #include <linux/delay.h> |
Christoph Hellwig | 21d3471 | 2015-11-26 09:08:36 +0100 | [diff] [blame] | 18 | #include <linux/errno.h> |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 19 | #include <linux/hdreg.h> |
Christoph Hellwig | 21d3471 | 2015-11-26 09:08:36 +0100 | [diff] [blame] | 20 | #include <linux/kernel.h> |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 21 | #include <linux/module.h> |
| 22 | #include <linux/list_sort.h> |
Christoph Hellwig | 21d3471 | 2015-11-26 09:08:36 +0100 | [diff] [blame] | 23 | #include <linux/slab.h> |
| 24 | #include <linux/types.h> |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 25 | #include <linux/pr.h> |
| 26 | #include <linux/ptrace.h> |
| 27 | #include <linux/nvme_ioctl.h> |
| 28 | #include <linux/t10-pi.h> |
| 29 | #include <scsi/sg.h> |
| 30 | #include <asm/unaligned.h> |
Christoph Hellwig | 21d3471 | 2015-11-26 09:08:36 +0100 | [diff] [blame] | 31 | |
| 32 | #include "nvme.h" |
Sagi Grimberg | 038bd4c | 2016-06-13 16:45:28 +0200 | [diff] [blame] | 33 | #include "fabrics.h" |
Christoph Hellwig | 21d3471 | 2015-11-26 09:08:36 +0100 | [diff] [blame] | 34 | |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 35 | #define NVME_MINORS (1U << MINORBITS) |
| 36 | |
Ming Lin | ba0ba7d | 2016-02-10 10:03:30 -0800 | [diff] [blame] | 37 | unsigned char admin_timeout = 60; |
| 38 | module_param(admin_timeout, byte, 0644); |
| 39 | MODULE_PARM_DESC(admin_timeout, "timeout in seconds for admin commands"); |
Ming Lin | 576d55d | 2016-02-10 10:03:32 -0800 | [diff] [blame] | 40 | EXPORT_SYMBOL_GPL(admin_timeout); |
Ming Lin | ba0ba7d | 2016-02-10 10:03:30 -0800 | [diff] [blame] | 41 | |
| 42 | unsigned char nvme_io_timeout = 30; |
| 43 | module_param_named(io_timeout, nvme_io_timeout, byte, 0644); |
| 44 | MODULE_PARM_DESC(io_timeout, "timeout in seconds for I/O"); |
Ming Lin | 576d55d | 2016-02-10 10:03:32 -0800 | [diff] [blame] | 45 | EXPORT_SYMBOL_GPL(nvme_io_timeout); |
Ming Lin | ba0ba7d | 2016-02-10 10:03:30 -0800 | [diff] [blame] | 46 | |
| 47 | unsigned char shutdown_timeout = 5; |
| 48 | module_param(shutdown_timeout, byte, 0644); |
| 49 | MODULE_PARM_DESC(shutdown_timeout, "timeout in seconds for controller shutdown"); |
| 50 | |
Keith Busch | f80ec96 | 2016-07-12 16:20:31 -0700 | [diff] [blame] | 51 | unsigned int nvme_max_retries = 5; |
| 52 | module_param_named(max_retries, nvme_max_retries, uint, 0644); |
| 53 | MODULE_PARM_DESC(max_retries, "max number of retries a command may have"); |
| 54 | EXPORT_SYMBOL_GPL(nvme_max_retries); |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 55 | |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 56 | static int nvme_char_major; |
| 57 | module_param(nvme_char_major, int, 0); |
| 58 | |
| 59 | static LIST_HEAD(nvme_ctrl_list); |
Ming Lin | 9f2482b | 2016-02-10 10:03:31 -0800 | [diff] [blame] | 60 | static DEFINE_SPINLOCK(dev_list_lock); |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 61 | |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 62 | static struct class *nvme_class; |
| 63 | |
Ming Lin | c55a2fd | 2016-05-18 14:05:02 -0700 | [diff] [blame] | 64 | void nvme_cancel_request(struct request *req, void *data, bool reserved) |
| 65 | { |
| 66 | int status; |
| 67 | |
| 68 | if (!blk_mq_request_started(req)) |
| 69 | return; |
| 70 | |
| 71 | dev_dbg_ratelimited(((struct nvme_ctrl *) data)->device, |
| 72 | "Cancelling I/O %d", req->tag); |
| 73 | |
| 74 | status = NVME_SC_ABORT_REQ; |
| 75 | if (blk_queue_dying(req->q)) |
| 76 | status |= NVME_SC_DNR; |
| 77 | blk_mq_complete_request(req, status); |
| 78 | } |
| 79 | EXPORT_SYMBOL_GPL(nvme_cancel_request); |
| 80 | |
Christoph Hellwig | bb8d261 | 2016-04-26 13:51:57 +0200 | [diff] [blame] | 81 | bool nvme_change_ctrl_state(struct nvme_ctrl *ctrl, |
| 82 | enum nvme_ctrl_state new_state) |
| 83 | { |
Gabriel Krisman Bertazi | f6b6a28 | 2016-07-29 16:15:18 -0300 | [diff] [blame] | 84 | enum nvme_ctrl_state old_state; |
Christoph Hellwig | bb8d261 | 2016-04-26 13:51:57 +0200 | [diff] [blame] | 85 | bool changed = false; |
| 86 | |
| 87 | spin_lock_irq(&ctrl->lock); |
Gabriel Krisman Bertazi | f6b6a28 | 2016-07-29 16:15:18 -0300 | [diff] [blame] | 88 | |
| 89 | old_state = ctrl->state; |
Christoph Hellwig | bb8d261 | 2016-04-26 13:51:57 +0200 | [diff] [blame] | 90 | switch (new_state) { |
| 91 | case NVME_CTRL_LIVE: |
| 92 | switch (old_state) { |
Christoph Hellwig | 7d2e800 | 2016-06-13 16:45:22 +0200 | [diff] [blame] | 93 | case NVME_CTRL_NEW: |
Christoph Hellwig | bb8d261 | 2016-04-26 13:51:57 +0200 | [diff] [blame] | 94 | case NVME_CTRL_RESETTING: |
Christoph Hellwig | def61ec | 2016-07-06 21:55:49 +0900 | [diff] [blame] | 95 | case NVME_CTRL_RECONNECTING: |
Christoph Hellwig | bb8d261 | 2016-04-26 13:51:57 +0200 | [diff] [blame] | 96 | changed = true; |
| 97 | /* FALLTHRU */ |
| 98 | default: |
| 99 | break; |
| 100 | } |
| 101 | break; |
| 102 | case NVME_CTRL_RESETTING: |
| 103 | switch (old_state) { |
| 104 | case NVME_CTRL_NEW: |
| 105 | case NVME_CTRL_LIVE: |
Christoph Hellwig | def61ec | 2016-07-06 21:55:49 +0900 | [diff] [blame] | 106 | case NVME_CTRL_RECONNECTING: |
| 107 | changed = true; |
| 108 | /* FALLTHRU */ |
| 109 | default: |
| 110 | break; |
| 111 | } |
| 112 | break; |
| 113 | case NVME_CTRL_RECONNECTING: |
| 114 | switch (old_state) { |
| 115 | case NVME_CTRL_LIVE: |
Christoph Hellwig | bb8d261 | 2016-04-26 13:51:57 +0200 | [diff] [blame] | 116 | changed = true; |
| 117 | /* FALLTHRU */ |
| 118 | default: |
| 119 | break; |
| 120 | } |
| 121 | break; |
| 122 | case NVME_CTRL_DELETING: |
| 123 | switch (old_state) { |
| 124 | case NVME_CTRL_LIVE: |
| 125 | case NVME_CTRL_RESETTING: |
Christoph Hellwig | def61ec | 2016-07-06 21:55:49 +0900 | [diff] [blame] | 126 | case NVME_CTRL_RECONNECTING: |
Christoph Hellwig | bb8d261 | 2016-04-26 13:51:57 +0200 | [diff] [blame] | 127 | changed = true; |
| 128 | /* FALLTHRU */ |
| 129 | default: |
| 130 | break; |
| 131 | } |
| 132 | break; |
Keith Busch | 0ff9d4e | 2016-05-12 08:37:14 -0600 | [diff] [blame] | 133 | case NVME_CTRL_DEAD: |
| 134 | switch (old_state) { |
| 135 | case NVME_CTRL_DELETING: |
| 136 | changed = true; |
| 137 | /* FALLTHRU */ |
| 138 | default: |
| 139 | break; |
| 140 | } |
| 141 | break; |
Christoph Hellwig | bb8d261 | 2016-04-26 13:51:57 +0200 | [diff] [blame] | 142 | default: |
| 143 | break; |
| 144 | } |
Christoph Hellwig | bb8d261 | 2016-04-26 13:51:57 +0200 | [diff] [blame] | 145 | |
| 146 | if (changed) |
| 147 | ctrl->state = new_state; |
| 148 | |
Gabriel Krisman Bertazi | f6b6a28 | 2016-07-29 16:15:18 -0300 | [diff] [blame] | 149 | spin_unlock_irq(&ctrl->lock); |
| 150 | |
Christoph Hellwig | bb8d261 | 2016-04-26 13:51:57 +0200 | [diff] [blame] | 151 | return changed; |
| 152 | } |
| 153 | EXPORT_SYMBOL_GPL(nvme_change_ctrl_state); |
| 154 | |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 155 | static void nvme_free_ns(struct kref *kref) |
| 156 | { |
| 157 | struct nvme_ns *ns = container_of(kref, struct nvme_ns, kref); |
| 158 | |
Matias Bjørling | b0b4e09 | 2016-09-16 14:25:07 +0200 | [diff] [blame] | 159 | if (ns->ndev) |
| 160 | nvme_nvm_unregister(ns); |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 161 | |
Matias Bjørling | b0b4e09 | 2016-09-16 14:25:07 +0200 | [diff] [blame] | 162 | if (ns->disk) { |
| 163 | spin_lock(&dev_list_lock); |
| 164 | ns->disk->private_data = NULL; |
| 165 | spin_unlock(&dev_list_lock); |
| 166 | } |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 167 | |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 168 | put_disk(ns->disk); |
Keith Busch | 075790e | 2016-02-24 09:15:53 -0700 | [diff] [blame] | 169 | ida_simple_remove(&ns->ctrl->ns_ida, ns->instance); |
| 170 | nvme_put_ctrl(ns->ctrl); |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 171 | kfree(ns); |
| 172 | } |
| 173 | |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 174 | static void nvme_put_ns(struct nvme_ns *ns) |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 175 | { |
| 176 | kref_put(&ns->kref, nvme_free_ns); |
| 177 | } |
| 178 | |
| 179 | static struct nvme_ns *nvme_get_ns_from_disk(struct gendisk *disk) |
| 180 | { |
| 181 | struct nvme_ns *ns; |
| 182 | |
| 183 | spin_lock(&dev_list_lock); |
| 184 | ns = disk->private_data; |
Sagi Grimberg | e439bb1 | 2016-02-10 10:03:29 -0800 | [diff] [blame] | 185 | if (ns) { |
| 186 | if (!kref_get_unless_zero(&ns->kref)) |
| 187 | goto fail; |
| 188 | if (!try_module_get(ns->ctrl->ops->module)) |
| 189 | goto fail_put_ns; |
| 190 | } |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 191 | spin_unlock(&dev_list_lock); |
| 192 | |
| 193 | return ns; |
Sagi Grimberg | e439bb1 | 2016-02-10 10:03:29 -0800 | [diff] [blame] | 194 | |
| 195 | fail_put_ns: |
| 196 | kref_put(&ns->kref, nvme_free_ns); |
| 197 | fail: |
| 198 | spin_unlock(&dev_list_lock); |
| 199 | return NULL; |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 200 | } |
| 201 | |
Christoph Hellwig | 7688faa | 2015-11-28 15:41:58 +0100 | [diff] [blame] | 202 | void nvme_requeue_req(struct request *req) |
| 203 | { |
| 204 | unsigned long flags; |
| 205 | |
| 206 | blk_mq_requeue_request(req); |
| 207 | spin_lock_irqsave(req->q->queue_lock, flags); |
| 208 | if (!blk_queue_stopped(req->q)) |
| 209 | blk_mq_kick_requeue_list(req->q); |
| 210 | spin_unlock_irqrestore(req->q->queue_lock, flags); |
| 211 | } |
Ming Lin | 576d55d | 2016-02-10 10:03:32 -0800 | [diff] [blame] | 212 | EXPORT_SYMBOL_GPL(nvme_requeue_req); |
Christoph Hellwig | 7688faa | 2015-11-28 15:41:58 +0100 | [diff] [blame] | 213 | |
Christoph Hellwig | 4160982 | 2015-11-20 09:00:02 +0100 | [diff] [blame] | 214 | struct request *nvme_alloc_request(struct request_queue *q, |
Christoph Hellwig | eb71f43 | 2016-06-13 16:45:23 +0200 | [diff] [blame] | 215 | struct nvme_command *cmd, unsigned int flags, int qid) |
Christoph Hellwig | 21d3471 | 2015-11-26 09:08:36 +0100 | [diff] [blame] | 216 | { |
Christoph Hellwig | 21d3471 | 2015-11-26 09:08:36 +0100 | [diff] [blame] | 217 | struct request *req; |
Christoph Hellwig | 21d3471 | 2015-11-26 09:08:36 +0100 | [diff] [blame] | 218 | |
Christoph Hellwig | eb71f43 | 2016-06-13 16:45:23 +0200 | [diff] [blame] | 219 | if (qid == NVME_QID_ANY) { |
| 220 | req = blk_mq_alloc_request(q, nvme_is_write(cmd), flags); |
| 221 | } else { |
| 222 | req = blk_mq_alloc_request_hctx(q, nvme_is_write(cmd), flags, |
| 223 | qid ? qid - 1 : 0); |
| 224 | } |
Christoph Hellwig | 21d3471 | 2015-11-26 09:08:36 +0100 | [diff] [blame] | 225 | if (IS_ERR(req)) |
Christoph Hellwig | 4160982 | 2015-11-20 09:00:02 +0100 | [diff] [blame] | 226 | return req; |
Christoph Hellwig | 21d3471 | 2015-11-26 09:08:36 +0100 | [diff] [blame] | 227 | |
| 228 | req->cmd_type = REQ_TYPE_DRV_PRIV; |
| 229 | req->cmd_flags |= REQ_FAILFAST_DRIVER; |
Christoph Hellwig | 21d3471 | 2015-11-26 09:08:36 +0100 | [diff] [blame] | 230 | req->cmd = (unsigned char *)cmd; |
| 231 | req->cmd_len = sizeof(struct nvme_command); |
Christoph Hellwig | 21d3471 | 2015-11-26 09:08:36 +0100 | [diff] [blame] | 232 | |
Christoph Hellwig | 4160982 | 2015-11-20 09:00:02 +0100 | [diff] [blame] | 233 | return req; |
| 234 | } |
Ming Lin | 576d55d | 2016-02-10 10:03:32 -0800 | [diff] [blame] | 235 | EXPORT_SYMBOL_GPL(nvme_alloc_request); |
Christoph Hellwig | 4160982 | 2015-11-20 09:00:02 +0100 | [diff] [blame] | 236 | |
Ming Lin | 8093f7c | 2016-04-12 13:10:14 -0600 | [diff] [blame] | 237 | static inline void nvme_setup_flush(struct nvme_ns *ns, |
| 238 | struct nvme_command *cmnd) |
| 239 | { |
| 240 | memset(cmnd, 0, sizeof(*cmnd)); |
| 241 | cmnd->common.opcode = nvme_cmd_flush; |
| 242 | cmnd->common.nsid = cpu_to_le32(ns->ns_id); |
| 243 | } |
| 244 | |
| 245 | static inline int nvme_setup_discard(struct nvme_ns *ns, struct request *req, |
| 246 | struct nvme_command *cmnd) |
| 247 | { |
| 248 | struct nvme_dsm_range *range; |
| 249 | struct page *page; |
| 250 | int offset; |
| 251 | unsigned int nr_bytes = blk_rq_bytes(req); |
| 252 | |
| 253 | range = kmalloc(sizeof(*range), GFP_ATOMIC); |
| 254 | if (!range) |
| 255 | return BLK_MQ_RQ_QUEUE_BUSY; |
| 256 | |
| 257 | range->cattr = cpu_to_le32(0); |
| 258 | range->nlb = cpu_to_le32(nr_bytes >> ns->lba_shift); |
| 259 | range->slba = cpu_to_le64(nvme_block_nr(ns, blk_rq_pos(req))); |
| 260 | |
| 261 | memset(cmnd, 0, sizeof(*cmnd)); |
| 262 | cmnd->dsm.opcode = nvme_cmd_dsm; |
| 263 | cmnd->dsm.nsid = cpu_to_le32(ns->ns_id); |
| 264 | cmnd->dsm.nr = 0; |
| 265 | cmnd->dsm.attributes = cpu_to_le32(NVME_DSMGMT_AD); |
| 266 | |
| 267 | req->completion_data = range; |
| 268 | page = virt_to_page(range); |
| 269 | offset = offset_in_page(range); |
| 270 | blk_add_request_payload(req, page, offset, sizeof(*range)); |
| 271 | |
| 272 | /* |
| 273 | * we set __data_len back to the size of the area to be discarded |
| 274 | * on disk. This allows us to report completion on the full amount |
| 275 | * of blocks described by the request. |
| 276 | */ |
| 277 | req->__data_len = nr_bytes; |
| 278 | |
| 279 | return 0; |
| 280 | } |
| 281 | |
| 282 | static inline void nvme_setup_rw(struct nvme_ns *ns, struct request *req, |
| 283 | struct nvme_command *cmnd) |
| 284 | { |
| 285 | u16 control = 0; |
| 286 | u32 dsmgmt = 0; |
| 287 | |
| 288 | if (req->cmd_flags & REQ_FUA) |
| 289 | control |= NVME_RW_FUA; |
| 290 | if (req->cmd_flags & (REQ_FAILFAST_DEV | REQ_RAHEAD)) |
| 291 | control |= NVME_RW_LR; |
| 292 | |
| 293 | if (req->cmd_flags & REQ_RAHEAD) |
| 294 | dsmgmt |= NVME_RW_DSM_FREQ_PREFETCH; |
| 295 | |
| 296 | memset(cmnd, 0, sizeof(*cmnd)); |
| 297 | cmnd->rw.opcode = (rq_data_dir(req) ? nvme_cmd_write : nvme_cmd_read); |
| 298 | cmnd->rw.command_id = req->tag; |
| 299 | cmnd->rw.nsid = cpu_to_le32(ns->ns_id); |
| 300 | cmnd->rw.slba = cpu_to_le64(nvme_block_nr(ns, blk_rq_pos(req))); |
| 301 | cmnd->rw.length = cpu_to_le16((blk_rq_bytes(req) >> ns->lba_shift) - 1); |
| 302 | |
| 303 | if (ns->ms) { |
| 304 | switch (ns->pi_type) { |
| 305 | case NVME_NS_DPS_PI_TYPE3: |
| 306 | control |= NVME_RW_PRINFO_PRCHK_GUARD; |
| 307 | break; |
| 308 | case NVME_NS_DPS_PI_TYPE1: |
| 309 | case NVME_NS_DPS_PI_TYPE2: |
| 310 | control |= NVME_RW_PRINFO_PRCHK_GUARD | |
| 311 | NVME_RW_PRINFO_PRCHK_REF; |
| 312 | cmnd->rw.reftag = cpu_to_le32( |
| 313 | nvme_block_nr(ns, blk_rq_pos(req))); |
| 314 | break; |
| 315 | } |
| 316 | if (!blk_integrity_rq(req)) |
| 317 | control |= NVME_RW_PRINFO_PRACT; |
| 318 | } |
| 319 | |
| 320 | cmnd->rw.control = cpu_to_le16(control); |
| 321 | cmnd->rw.dsmgmt = cpu_to_le32(dsmgmt); |
| 322 | } |
| 323 | |
| 324 | int nvme_setup_cmd(struct nvme_ns *ns, struct request *req, |
| 325 | struct nvme_command *cmd) |
| 326 | { |
| 327 | int ret = 0; |
| 328 | |
| 329 | if (req->cmd_type == REQ_TYPE_DRV_PRIV) |
| 330 | memcpy(cmd, req->cmd, sizeof(*cmd)); |
Mike Christie | 3a5e02c | 2016-06-05 14:32:23 -0500 | [diff] [blame] | 331 | else if (req_op(req) == REQ_OP_FLUSH) |
Ming Lin | 8093f7c | 2016-04-12 13:10:14 -0600 | [diff] [blame] | 332 | nvme_setup_flush(ns, cmd); |
Mike Christie | c2df40d | 2016-06-05 14:32:17 -0500 | [diff] [blame] | 333 | else if (req_op(req) == REQ_OP_DISCARD) |
Ming Lin | 8093f7c | 2016-04-12 13:10:14 -0600 | [diff] [blame] | 334 | ret = nvme_setup_discard(ns, req, cmd); |
| 335 | else |
| 336 | nvme_setup_rw(ns, req, cmd); |
| 337 | |
| 338 | return ret; |
| 339 | } |
| 340 | EXPORT_SYMBOL_GPL(nvme_setup_cmd); |
| 341 | |
Christoph Hellwig | 4160982 | 2015-11-20 09:00:02 +0100 | [diff] [blame] | 342 | /* |
| 343 | * Returns 0 on success. If the result is negative, it's a Linux error code; |
| 344 | * if the result is positive, it's an NVM Express status code |
| 345 | */ |
| 346 | int __nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd, |
Christoph Hellwig | 1cb3cce | 2016-02-29 15:59:47 +0100 | [diff] [blame] | 347 | struct nvme_completion *cqe, void *buffer, unsigned bufflen, |
Christoph Hellwig | eb71f43 | 2016-06-13 16:45:23 +0200 | [diff] [blame] | 348 | unsigned timeout, int qid, int at_head, int flags) |
Christoph Hellwig | 4160982 | 2015-11-20 09:00:02 +0100 | [diff] [blame] | 349 | { |
| 350 | struct request *req; |
| 351 | int ret; |
| 352 | |
Christoph Hellwig | eb71f43 | 2016-06-13 16:45:23 +0200 | [diff] [blame] | 353 | req = nvme_alloc_request(q, cmd, flags, qid); |
Christoph Hellwig | 4160982 | 2015-11-20 09:00:02 +0100 | [diff] [blame] | 354 | if (IS_ERR(req)) |
| 355 | return PTR_ERR(req); |
| 356 | |
| 357 | req->timeout = timeout ? timeout : ADMIN_TIMEOUT; |
Christoph Hellwig | 1cb3cce | 2016-02-29 15:59:47 +0100 | [diff] [blame] | 358 | req->special = cqe; |
Christoph Hellwig | 4160982 | 2015-11-20 09:00:02 +0100 | [diff] [blame] | 359 | |
Christoph Hellwig | 21d3471 | 2015-11-26 09:08:36 +0100 | [diff] [blame] | 360 | if (buffer && bufflen) { |
| 361 | ret = blk_rq_map_kern(q, req, buffer, bufflen, GFP_KERNEL); |
| 362 | if (ret) |
| 363 | goto out; |
Christoph Hellwig | 4160982 | 2015-11-20 09:00:02 +0100 | [diff] [blame] | 364 | } |
| 365 | |
Christoph Hellwig | eb71f43 | 2016-06-13 16:45:23 +0200 | [diff] [blame] | 366 | blk_execute_rq(req->q, NULL, req, at_head); |
Christoph Hellwig | 4160982 | 2015-11-20 09:00:02 +0100 | [diff] [blame] | 367 | ret = req->errors; |
| 368 | out: |
| 369 | blk_mq_free_request(req); |
| 370 | return ret; |
| 371 | } |
Christoph Hellwig | eb71f43 | 2016-06-13 16:45:23 +0200 | [diff] [blame] | 372 | EXPORT_SYMBOL_GPL(__nvme_submit_sync_cmd); |
Christoph Hellwig | 4160982 | 2015-11-20 09:00:02 +0100 | [diff] [blame] | 373 | |
| 374 | int nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd, |
| 375 | void *buffer, unsigned bufflen) |
| 376 | { |
Christoph Hellwig | eb71f43 | 2016-06-13 16:45:23 +0200 | [diff] [blame] | 377 | return __nvme_submit_sync_cmd(q, cmd, NULL, buffer, bufflen, 0, |
| 378 | NVME_QID_ANY, 0, 0); |
Christoph Hellwig | 4160982 | 2015-11-20 09:00:02 +0100 | [diff] [blame] | 379 | } |
Ming Lin | 576d55d | 2016-02-10 10:03:32 -0800 | [diff] [blame] | 380 | EXPORT_SYMBOL_GPL(nvme_submit_sync_cmd); |
Christoph Hellwig | 4160982 | 2015-11-20 09:00:02 +0100 | [diff] [blame] | 381 | |
Keith Busch | 0b7f1f2 | 2015-10-23 09:47:28 -0600 | [diff] [blame] | 382 | int __nvme_submit_user_cmd(struct request_queue *q, struct nvme_command *cmd, |
| 383 | void __user *ubuffer, unsigned bufflen, |
| 384 | void __user *meta_buffer, unsigned meta_len, u32 meta_seed, |
| 385 | u32 *result, unsigned timeout) |
Christoph Hellwig | 4160982 | 2015-11-20 09:00:02 +0100 | [diff] [blame] | 386 | { |
Christoph Hellwig | 7a5abb4 | 2016-06-06 23:20:49 +0200 | [diff] [blame] | 387 | bool write = nvme_is_write(cmd); |
Christoph Hellwig | 1cb3cce | 2016-02-29 15:59:47 +0100 | [diff] [blame] | 388 | struct nvme_completion cqe; |
Keith Busch | 0b7f1f2 | 2015-10-23 09:47:28 -0600 | [diff] [blame] | 389 | struct nvme_ns *ns = q->queuedata; |
| 390 | struct gendisk *disk = ns ? ns->disk : NULL; |
Christoph Hellwig | 4160982 | 2015-11-20 09:00:02 +0100 | [diff] [blame] | 391 | struct request *req; |
Keith Busch | 0b7f1f2 | 2015-10-23 09:47:28 -0600 | [diff] [blame] | 392 | struct bio *bio = NULL; |
| 393 | void *meta = NULL; |
Christoph Hellwig | 4160982 | 2015-11-20 09:00:02 +0100 | [diff] [blame] | 394 | int ret; |
| 395 | |
Christoph Hellwig | eb71f43 | 2016-06-13 16:45:23 +0200 | [diff] [blame] | 396 | req = nvme_alloc_request(q, cmd, 0, NVME_QID_ANY); |
Christoph Hellwig | 4160982 | 2015-11-20 09:00:02 +0100 | [diff] [blame] | 397 | if (IS_ERR(req)) |
| 398 | return PTR_ERR(req); |
| 399 | |
| 400 | req->timeout = timeout ? timeout : ADMIN_TIMEOUT; |
Christoph Hellwig | 1cb3cce | 2016-02-29 15:59:47 +0100 | [diff] [blame] | 401 | req->special = &cqe; |
Christoph Hellwig | 4160982 | 2015-11-20 09:00:02 +0100 | [diff] [blame] | 402 | |
| 403 | if (ubuffer && bufflen) { |
Christoph Hellwig | 21d3471 | 2015-11-26 09:08:36 +0100 | [diff] [blame] | 404 | ret = blk_rq_map_user(q, req, NULL, ubuffer, bufflen, |
| 405 | GFP_KERNEL); |
| 406 | if (ret) |
| 407 | goto out; |
| 408 | bio = req->bio; |
Christoph Hellwig | 21d3471 | 2015-11-26 09:08:36 +0100 | [diff] [blame] | 409 | |
Keith Busch | 0b7f1f2 | 2015-10-23 09:47:28 -0600 | [diff] [blame] | 410 | if (!disk) |
| 411 | goto submit; |
| 412 | bio->bi_bdev = bdget_disk(disk, 0); |
| 413 | if (!bio->bi_bdev) { |
| 414 | ret = -ENODEV; |
| 415 | goto out_unmap; |
| 416 | } |
| 417 | |
Keith Busch | e9fc63d | 2016-02-24 09:15:58 -0700 | [diff] [blame] | 418 | if (meta_buffer && meta_len) { |
Keith Busch | 0b7f1f2 | 2015-10-23 09:47:28 -0600 | [diff] [blame] | 419 | struct bio_integrity_payload *bip; |
| 420 | |
| 421 | meta = kmalloc(meta_len, GFP_KERNEL); |
| 422 | if (!meta) { |
| 423 | ret = -ENOMEM; |
| 424 | goto out_unmap; |
| 425 | } |
| 426 | |
| 427 | if (write) { |
| 428 | if (copy_from_user(meta, meta_buffer, |
| 429 | meta_len)) { |
| 430 | ret = -EFAULT; |
| 431 | goto out_free_meta; |
| 432 | } |
| 433 | } |
| 434 | |
| 435 | bip = bio_integrity_alloc(bio, GFP_KERNEL, 1); |
Keith Busch | 06c1e39 | 2015-12-03 09:32:21 -0700 | [diff] [blame] | 436 | if (IS_ERR(bip)) { |
| 437 | ret = PTR_ERR(bip); |
Keith Busch | 0b7f1f2 | 2015-10-23 09:47:28 -0600 | [diff] [blame] | 438 | goto out_free_meta; |
| 439 | } |
| 440 | |
| 441 | bip->bip_iter.bi_size = meta_len; |
| 442 | bip->bip_iter.bi_sector = meta_seed; |
| 443 | |
| 444 | ret = bio_integrity_add_page(bio, virt_to_page(meta), |
| 445 | meta_len, offset_in_page(meta)); |
| 446 | if (ret != meta_len) { |
| 447 | ret = -ENOMEM; |
| 448 | goto out_free_meta; |
| 449 | } |
| 450 | } |
| 451 | } |
| 452 | submit: |
| 453 | blk_execute_rq(req->q, disk, req, 0); |
| 454 | ret = req->errors; |
Christoph Hellwig | 21d3471 | 2015-11-26 09:08:36 +0100 | [diff] [blame] | 455 | if (result) |
Christoph Hellwig | 1cb3cce | 2016-02-29 15:59:47 +0100 | [diff] [blame] | 456 | *result = le32_to_cpu(cqe.result); |
Keith Busch | 0b7f1f2 | 2015-10-23 09:47:28 -0600 | [diff] [blame] | 457 | if (meta && !ret && !write) { |
| 458 | if (copy_to_user(meta_buffer, meta, meta_len)) |
| 459 | ret = -EFAULT; |
| 460 | } |
| 461 | out_free_meta: |
| 462 | kfree(meta); |
| 463 | out_unmap: |
| 464 | if (bio) { |
| 465 | if (disk && bio->bi_bdev) |
| 466 | bdput(bio->bi_bdev); |
| 467 | blk_rq_unmap_user(bio); |
| 468 | } |
Christoph Hellwig | 21d3471 | 2015-11-26 09:08:36 +0100 | [diff] [blame] | 469 | out: |
| 470 | blk_mq_free_request(req); |
| 471 | return ret; |
| 472 | } |
| 473 | |
Keith Busch | 0b7f1f2 | 2015-10-23 09:47:28 -0600 | [diff] [blame] | 474 | int nvme_submit_user_cmd(struct request_queue *q, struct nvme_command *cmd, |
| 475 | void __user *ubuffer, unsigned bufflen, u32 *result, |
| 476 | unsigned timeout) |
| 477 | { |
| 478 | return __nvme_submit_user_cmd(q, cmd, ubuffer, bufflen, NULL, 0, 0, |
| 479 | result, timeout); |
| 480 | } |
| 481 | |
Sagi Grimberg | 038bd4c | 2016-06-13 16:45:28 +0200 | [diff] [blame] | 482 | static void nvme_keep_alive_end_io(struct request *rq, int error) |
| 483 | { |
| 484 | struct nvme_ctrl *ctrl = rq->end_io_data; |
| 485 | |
| 486 | blk_mq_free_request(rq); |
| 487 | |
| 488 | if (error) { |
| 489 | dev_err(ctrl->device, |
| 490 | "failed nvme_keep_alive_end_io error=%d\n", error); |
| 491 | return; |
| 492 | } |
| 493 | |
| 494 | schedule_delayed_work(&ctrl->ka_work, ctrl->kato * HZ); |
| 495 | } |
| 496 | |
| 497 | static int nvme_keep_alive(struct nvme_ctrl *ctrl) |
| 498 | { |
| 499 | struct nvme_command c; |
| 500 | struct request *rq; |
| 501 | |
| 502 | memset(&c, 0, sizeof(c)); |
| 503 | c.common.opcode = nvme_admin_keep_alive; |
| 504 | |
| 505 | rq = nvme_alloc_request(ctrl->admin_q, &c, BLK_MQ_REQ_RESERVED, |
| 506 | NVME_QID_ANY); |
| 507 | if (IS_ERR(rq)) |
| 508 | return PTR_ERR(rq); |
| 509 | |
| 510 | rq->timeout = ctrl->kato * HZ; |
| 511 | rq->end_io_data = ctrl; |
| 512 | |
| 513 | blk_execute_rq_nowait(rq->q, NULL, rq, 0, nvme_keep_alive_end_io); |
| 514 | |
| 515 | return 0; |
| 516 | } |
| 517 | |
| 518 | static void nvme_keep_alive_work(struct work_struct *work) |
| 519 | { |
| 520 | struct nvme_ctrl *ctrl = container_of(to_delayed_work(work), |
| 521 | struct nvme_ctrl, ka_work); |
| 522 | |
| 523 | if (nvme_keep_alive(ctrl)) { |
| 524 | /* allocation failure, reset the controller */ |
| 525 | dev_err(ctrl->device, "keep-alive failed\n"); |
| 526 | ctrl->ops->reset_ctrl(ctrl); |
| 527 | return; |
| 528 | } |
| 529 | } |
| 530 | |
| 531 | void nvme_start_keep_alive(struct nvme_ctrl *ctrl) |
| 532 | { |
| 533 | if (unlikely(ctrl->kato == 0)) |
| 534 | return; |
| 535 | |
| 536 | INIT_DELAYED_WORK(&ctrl->ka_work, nvme_keep_alive_work); |
| 537 | schedule_delayed_work(&ctrl->ka_work, ctrl->kato * HZ); |
| 538 | } |
| 539 | EXPORT_SYMBOL_GPL(nvme_start_keep_alive); |
| 540 | |
| 541 | void nvme_stop_keep_alive(struct nvme_ctrl *ctrl) |
| 542 | { |
| 543 | if (unlikely(ctrl->kato == 0)) |
| 544 | return; |
| 545 | |
| 546 | cancel_delayed_work_sync(&ctrl->ka_work); |
| 547 | } |
| 548 | EXPORT_SYMBOL_GPL(nvme_stop_keep_alive); |
| 549 | |
Christoph Hellwig | 1c63dc6 | 2015-11-26 10:06:56 +0100 | [diff] [blame] | 550 | int nvme_identify_ctrl(struct nvme_ctrl *dev, struct nvme_id_ctrl **id) |
Christoph Hellwig | 21d3471 | 2015-11-26 09:08:36 +0100 | [diff] [blame] | 551 | { |
| 552 | struct nvme_command c = { }; |
| 553 | int error; |
| 554 | |
| 555 | /* gcc-4.4.4 (at least) has issues with initializers and anon unions */ |
| 556 | c.identify.opcode = nvme_admin_identify; |
Christoph Hellwig | fa60682 | 2016-09-30 13:51:09 +0200 | [diff] [blame] | 557 | c.identify.cns = cpu_to_le32(NVME_ID_CNS_CTRL); |
Christoph Hellwig | 21d3471 | 2015-11-26 09:08:36 +0100 | [diff] [blame] | 558 | |
| 559 | *id = kmalloc(sizeof(struct nvme_id_ctrl), GFP_KERNEL); |
| 560 | if (!*id) |
| 561 | return -ENOMEM; |
| 562 | |
| 563 | error = nvme_submit_sync_cmd(dev->admin_q, &c, *id, |
| 564 | sizeof(struct nvme_id_ctrl)); |
| 565 | if (error) |
| 566 | kfree(*id); |
| 567 | return error; |
| 568 | } |
| 569 | |
Keith Busch | 540c801 | 2015-10-22 15:45:06 -0600 | [diff] [blame] | 570 | static int nvme_identify_ns_list(struct nvme_ctrl *dev, unsigned nsid, __le32 *ns_list) |
| 571 | { |
| 572 | struct nvme_command c = { }; |
| 573 | |
| 574 | c.identify.opcode = nvme_admin_identify; |
Christoph Hellwig | fa60682 | 2016-09-30 13:51:09 +0200 | [diff] [blame] | 575 | c.identify.cns = cpu_to_le32(NVME_ID_CNS_NS_ACTIVE_LIST); |
Keith Busch | 540c801 | 2015-10-22 15:45:06 -0600 | [diff] [blame] | 576 | c.identify.nsid = cpu_to_le32(nsid); |
| 577 | return nvme_submit_sync_cmd(dev->admin_q, &c, ns_list, 0x1000); |
| 578 | } |
| 579 | |
Christoph Hellwig | 1c63dc6 | 2015-11-26 10:06:56 +0100 | [diff] [blame] | 580 | int nvme_identify_ns(struct nvme_ctrl *dev, unsigned nsid, |
Christoph Hellwig | 21d3471 | 2015-11-26 09:08:36 +0100 | [diff] [blame] | 581 | struct nvme_id_ns **id) |
| 582 | { |
| 583 | struct nvme_command c = { }; |
| 584 | int error; |
| 585 | |
| 586 | /* gcc-4.4.4 (at least) has issues with initializers and anon unions */ |
| 587 | c.identify.opcode = nvme_admin_identify, |
| 588 | c.identify.nsid = cpu_to_le32(nsid), |
| 589 | |
| 590 | *id = kmalloc(sizeof(struct nvme_id_ns), GFP_KERNEL); |
| 591 | if (!*id) |
| 592 | return -ENOMEM; |
| 593 | |
| 594 | error = nvme_submit_sync_cmd(dev->admin_q, &c, *id, |
| 595 | sizeof(struct nvme_id_ns)); |
| 596 | if (error) |
| 597 | kfree(*id); |
| 598 | return error; |
| 599 | } |
| 600 | |
Christoph Hellwig | 1c63dc6 | 2015-11-26 10:06:56 +0100 | [diff] [blame] | 601 | int nvme_get_features(struct nvme_ctrl *dev, unsigned fid, unsigned nsid, |
Andy Lutomirski | 1a6fe74 | 2016-09-16 11:16:10 -0700 | [diff] [blame] | 602 | void *buffer, size_t buflen, u32 *result) |
Christoph Hellwig | 21d3471 | 2015-11-26 09:08:36 +0100 | [diff] [blame] | 603 | { |
| 604 | struct nvme_command c; |
Christoph Hellwig | 1cb3cce | 2016-02-29 15:59:47 +0100 | [diff] [blame] | 605 | struct nvme_completion cqe; |
| 606 | int ret; |
Christoph Hellwig | 21d3471 | 2015-11-26 09:08:36 +0100 | [diff] [blame] | 607 | |
| 608 | memset(&c, 0, sizeof(c)); |
| 609 | c.features.opcode = nvme_admin_get_features; |
| 610 | c.features.nsid = cpu_to_le32(nsid); |
Christoph Hellwig | 21d3471 | 2015-11-26 09:08:36 +0100 | [diff] [blame] | 611 | c.features.fid = cpu_to_le32(fid); |
| 612 | |
Andy Lutomirski | 1a6fe74 | 2016-09-16 11:16:10 -0700 | [diff] [blame] | 613 | ret = __nvme_submit_sync_cmd(dev->admin_q, &c, &cqe, buffer, buflen, 0, |
Christoph Hellwig | eb71f43 | 2016-06-13 16:45:23 +0200 | [diff] [blame] | 614 | NVME_QID_ANY, 0, 0); |
Andy Lutomirski | 9b47f77a | 2016-08-24 03:52:12 -0700 | [diff] [blame] | 615 | if (ret >= 0 && result) |
Christoph Hellwig | 1cb3cce | 2016-02-29 15:59:47 +0100 | [diff] [blame] | 616 | *result = le32_to_cpu(cqe.result); |
| 617 | return ret; |
Christoph Hellwig | 21d3471 | 2015-11-26 09:08:36 +0100 | [diff] [blame] | 618 | } |
| 619 | |
Christoph Hellwig | 1c63dc6 | 2015-11-26 10:06:56 +0100 | [diff] [blame] | 620 | int nvme_set_features(struct nvme_ctrl *dev, unsigned fid, unsigned dword11, |
Andy Lutomirski | 1a6fe74 | 2016-09-16 11:16:10 -0700 | [diff] [blame] | 621 | void *buffer, size_t buflen, u32 *result) |
Christoph Hellwig | 21d3471 | 2015-11-26 09:08:36 +0100 | [diff] [blame] | 622 | { |
| 623 | struct nvme_command c; |
Christoph Hellwig | 1cb3cce | 2016-02-29 15:59:47 +0100 | [diff] [blame] | 624 | struct nvme_completion cqe; |
| 625 | int ret; |
Christoph Hellwig | 21d3471 | 2015-11-26 09:08:36 +0100 | [diff] [blame] | 626 | |
| 627 | memset(&c, 0, sizeof(c)); |
| 628 | c.features.opcode = nvme_admin_set_features; |
Christoph Hellwig | 21d3471 | 2015-11-26 09:08:36 +0100 | [diff] [blame] | 629 | c.features.fid = cpu_to_le32(fid); |
| 630 | c.features.dword11 = cpu_to_le32(dword11); |
| 631 | |
Andy Lutomirski | 1a6fe74 | 2016-09-16 11:16:10 -0700 | [diff] [blame] | 632 | ret = __nvme_submit_sync_cmd(dev->admin_q, &c, &cqe, |
| 633 | buffer, buflen, 0, NVME_QID_ANY, 0, 0); |
Andy Lutomirski | 9b47f77a | 2016-08-24 03:52:12 -0700 | [diff] [blame] | 634 | if (ret >= 0 && result) |
Christoph Hellwig | 1cb3cce | 2016-02-29 15:59:47 +0100 | [diff] [blame] | 635 | *result = le32_to_cpu(cqe.result); |
| 636 | return ret; |
Christoph Hellwig | 21d3471 | 2015-11-26 09:08:36 +0100 | [diff] [blame] | 637 | } |
| 638 | |
Christoph Hellwig | 1c63dc6 | 2015-11-26 10:06:56 +0100 | [diff] [blame] | 639 | int nvme_get_log_page(struct nvme_ctrl *dev, struct nvme_smart_log **log) |
Christoph Hellwig | 21d3471 | 2015-11-26 09:08:36 +0100 | [diff] [blame] | 640 | { |
| 641 | struct nvme_command c = { }; |
| 642 | int error; |
| 643 | |
| 644 | c.common.opcode = nvme_admin_get_log_page, |
| 645 | c.common.nsid = cpu_to_le32(0xFFFFFFFF), |
| 646 | c.common.cdw10[0] = cpu_to_le32( |
| 647 | (((sizeof(struct nvme_smart_log) / 4) - 1) << 16) | |
| 648 | NVME_LOG_SMART), |
| 649 | |
| 650 | *log = kmalloc(sizeof(struct nvme_smart_log), GFP_KERNEL); |
| 651 | if (!*log) |
| 652 | return -ENOMEM; |
| 653 | |
| 654 | error = nvme_submit_sync_cmd(dev->admin_q, &c, *log, |
| 655 | sizeof(struct nvme_smart_log)); |
| 656 | if (error) |
| 657 | kfree(*log); |
| 658 | return error; |
| 659 | } |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 660 | |
Christoph Hellwig | 9a0be7a | 2015-11-26 11:09:06 +0100 | [diff] [blame] | 661 | int nvme_set_queue_count(struct nvme_ctrl *ctrl, int *count) |
| 662 | { |
| 663 | u32 q_count = (*count - 1) | ((*count - 1) << 16); |
| 664 | u32 result; |
| 665 | int status, nr_io_queues; |
| 666 | |
Andy Lutomirski | 1a6fe74 | 2016-09-16 11:16:10 -0700 | [diff] [blame] | 667 | status = nvme_set_features(ctrl, NVME_FEAT_NUM_QUEUES, q_count, NULL, 0, |
Christoph Hellwig | 9a0be7a | 2015-11-26 11:09:06 +0100 | [diff] [blame] | 668 | &result); |
Christoph Hellwig | f5fa90d | 2016-06-06 23:20:50 +0200 | [diff] [blame] | 669 | if (status < 0) |
Christoph Hellwig | 9a0be7a | 2015-11-26 11:09:06 +0100 | [diff] [blame] | 670 | return status; |
| 671 | |
Christoph Hellwig | f5fa90d | 2016-06-06 23:20:50 +0200 | [diff] [blame] | 672 | /* |
| 673 | * Degraded controllers might return an error when setting the queue |
| 674 | * count. We still want to be able to bring them online and offer |
| 675 | * access to the admin queue, as that might be only way to fix them up. |
| 676 | */ |
| 677 | if (status > 0) { |
| 678 | dev_err(ctrl->dev, "Could not set queue count (%d)\n", status); |
| 679 | *count = 0; |
| 680 | } else { |
| 681 | nr_io_queues = min(result & 0xffff, result >> 16) + 1; |
| 682 | *count = min(*count, nr_io_queues); |
| 683 | } |
| 684 | |
Christoph Hellwig | 9a0be7a | 2015-11-26 11:09:06 +0100 | [diff] [blame] | 685 | return 0; |
| 686 | } |
Ming Lin | 576d55d | 2016-02-10 10:03:32 -0800 | [diff] [blame] | 687 | EXPORT_SYMBOL_GPL(nvme_set_queue_count); |
Christoph Hellwig | 9a0be7a | 2015-11-26 11:09:06 +0100 | [diff] [blame] | 688 | |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 689 | static int nvme_submit_io(struct nvme_ns *ns, struct nvme_user_io __user *uio) |
| 690 | { |
| 691 | struct nvme_user_io io; |
| 692 | struct nvme_command c; |
| 693 | unsigned length, meta_len; |
| 694 | void __user *metadata; |
| 695 | |
| 696 | if (copy_from_user(&io, uio, sizeof(io))) |
| 697 | return -EFAULT; |
Keith Busch | 63088ec | 2016-02-24 09:15:57 -0700 | [diff] [blame] | 698 | if (io.flags) |
| 699 | return -EINVAL; |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 700 | |
| 701 | switch (io.opcode) { |
| 702 | case nvme_cmd_write: |
| 703 | case nvme_cmd_read: |
| 704 | case nvme_cmd_compare: |
| 705 | break; |
| 706 | default: |
| 707 | return -EINVAL; |
| 708 | } |
| 709 | |
| 710 | length = (io.nblocks + 1) << ns->lba_shift; |
| 711 | meta_len = (io.nblocks + 1) * ns->ms; |
| 712 | metadata = (void __user *)(uintptr_t)io.metadata; |
| 713 | |
| 714 | if (ns->ext) { |
| 715 | length += meta_len; |
| 716 | meta_len = 0; |
| 717 | } else if (meta_len) { |
| 718 | if ((io.metadata & 3) || !io.metadata) |
| 719 | return -EINVAL; |
| 720 | } |
| 721 | |
| 722 | memset(&c, 0, sizeof(c)); |
| 723 | c.rw.opcode = io.opcode; |
| 724 | c.rw.flags = io.flags; |
| 725 | c.rw.nsid = cpu_to_le32(ns->ns_id); |
| 726 | c.rw.slba = cpu_to_le64(io.slba); |
| 727 | c.rw.length = cpu_to_le16(io.nblocks); |
| 728 | c.rw.control = cpu_to_le16(io.control); |
| 729 | c.rw.dsmgmt = cpu_to_le32(io.dsmgmt); |
| 730 | c.rw.reftag = cpu_to_le32(io.reftag); |
| 731 | c.rw.apptag = cpu_to_le16(io.apptag); |
| 732 | c.rw.appmask = cpu_to_le16(io.appmask); |
| 733 | |
| 734 | return __nvme_submit_user_cmd(ns->queue, &c, |
| 735 | (void __user *)(uintptr_t)io.addr, length, |
| 736 | metadata, meta_len, io.slba, NULL, 0); |
| 737 | } |
| 738 | |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 739 | static int nvme_user_cmd(struct nvme_ctrl *ctrl, struct nvme_ns *ns, |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 740 | struct nvme_passthru_cmd __user *ucmd) |
| 741 | { |
| 742 | struct nvme_passthru_cmd cmd; |
| 743 | struct nvme_command c; |
| 744 | unsigned timeout = 0; |
| 745 | int status; |
| 746 | |
| 747 | if (!capable(CAP_SYS_ADMIN)) |
| 748 | return -EACCES; |
| 749 | if (copy_from_user(&cmd, ucmd, sizeof(cmd))) |
| 750 | return -EFAULT; |
Keith Busch | 63088ec | 2016-02-24 09:15:57 -0700 | [diff] [blame] | 751 | if (cmd.flags) |
| 752 | return -EINVAL; |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 753 | |
| 754 | memset(&c, 0, sizeof(c)); |
| 755 | c.common.opcode = cmd.opcode; |
| 756 | c.common.flags = cmd.flags; |
| 757 | c.common.nsid = cpu_to_le32(cmd.nsid); |
| 758 | c.common.cdw2[0] = cpu_to_le32(cmd.cdw2); |
| 759 | c.common.cdw2[1] = cpu_to_le32(cmd.cdw3); |
| 760 | c.common.cdw10[0] = cpu_to_le32(cmd.cdw10); |
| 761 | c.common.cdw10[1] = cpu_to_le32(cmd.cdw11); |
| 762 | c.common.cdw10[2] = cpu_to_le32(cmd.cdw12); |
| 763 | c.common.cdw10[3] = cpu_to_le32(cmd.cdw13); |
| 764 | c.common.cdw10[4] = cpu_to_le32(cmd.cdw14); |
| 765 | c.common.cdw10[5] = cpu_to_le32(cmd.cdw15); |
| 766 | |
| 767 | if (cmd.timeout_ms) |
| 768 | timeout = msecs_to_jiffies(cmd.timeout_ms); |
| 769 | |
| 770 | status = nvme_submit_user_cmd(ns ? ns->queue : ctrl->admin_q, &c, |
Arnd Bergmann | d1ea7be | 2015-12-08 16:22:17 +0100 | [diff] [blame] | 771 | (void __user *)(uintptr_t)cmd.addr, cmd.data_len, |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 772 | &cmd.result, timeout); |
| 773 | if (status >= 0) { |
| 774 | if (put_user(cmd.result, &ucmd->result)) |
| 775 | return -EFAULT; |
| 776 | } |
| 777 | |
| 778 | return status; |
| 779 | } |
| 780 | |
| 781 | static int nvme_ioctl(struct block_device *bdev, fmode_t mode, |
| 782 | unsigned int cmd, unsigned long arg) |
| 783 | { |
| 784 | struct nvme_ns *ns = bdev->bd_disk->private_data; |
| 785 | |
| 786 | switch (cmd) { |
| 787 | case NVME_IOCTL_ID: |
| 788 | force_successful_syscall_return(); |
| 789 | return ns->ns_id; |
| 790 | case NVME_IOCTL_ADMIN_CMD: |
| 791 | return nvme_user_cmd(ns->ctrl, NULL, (void __user *)arg); |
| 792 | case NVME_IOCTL_IO_CMD: |
| 793 | return nvme_user_cmd(ns->ctrl, ns, (void __user *)arg); |
| 794 | case NVME_IOCTL_SUBMIT_IO: |
| 795 | return nvme_submit_io(ns, (void __user *)arg); |
Christoph Hellwig | 4490733 | 2015-12-24 15:27:02 +0100 | [diff] [blame] | 796 | #ifdef CONFIG_BLK_DEV_NVME_SCSI |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 797 | case SG_GET_VERSION_NUM: |
| 798 | return nvme_sg_get_version_num((void __user *)arg); |
| 799 | case SG_IO: |
| 800 | return nvme_sg_io(ns, (void __user *)arg); |
Christoph Hellwig | 4490733 | 2015-12-24 15:27:02 +0100 | [diff] [blame] | 801 | #endif |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 802 | default: |
| 803 | return -ENOTTY; |
| 804 | } |
| 805 | } |
| 806 | |
| 807 | #ifdef CONFIG_COMPAT |
| 808 | static int nvme_compat_ioctl(struct block_device *bdev, fmode_t mode, |
| 809 | unsigned int cmd, unsigned long arg) |
| 810 | { |
| 811 | switch (cmd) { |
| 812 | case SG_IO: |
| 813 | return -ENOIOCTLCMD; |
| 814 | } |
| 815 | return nvme_ioctl(bdev, mode, cmd, arg); |
| 816 | } |
| 817 | #else |
| 818 | #define nvme_compat_ioctl NULL |
| 819 | #endif |
| 820 | |
| 821 | static int nvme_open(struct block_device *bdev, fmode_t mode) |
| 822 | { |
| 823 | return nvme_get_ns_from_disk(bdev->bd_disk) ? 0 : -ENXIO; |
| 824 | } |
| 825 | |
| 826 | static void nvme_release(struct gendisk *disk, fmode_t mode) |
| 827 | { |
Sagi Grimberg | e439bb1 | 2016-02-10 10:03:29 -0800 | [diff] [blame] | 828 | struct nvme_ns *ns = disk->private_data; |
| 829 | |
| 830 | module_put(ns->ctrl->ops->module); |
| 831 | nvme_put_ns(ns); |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 832 | } |
| 833 | |
| 834 | static int nvme_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
| 835 | { |
| 836 | /* some standard values */ |
| 837 | geo->heads = 1 << 6; |
| 838 | geo->sectors = 1 << 5; |
| 839 | geo->cylinders = get_capacity(bdev->bd_disk) >> 11; |
| 840 | return 0; |
| 841 | } |
| 842 | |
| 843 | #ifdef CONFIG_BLK_DEV_INTEGRITY |
| 844 | static void nvme_init_integrity(struct nvme_ns *ns) |
| 845 | { |
| 846 | struct blk_integrity integrity; |
| 847 | |
Jay Freyensee | fa9a89f | 2016-07-20 21:26:16 -0600 | [diff] [blame] | 848 | memset(&integrity, 0, sizeof(integrity)); |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 849 | switch (ns->pi_type) { |
| 850 | case NVME_NS_DPS_PI_TYPE3: |
| 851 | integrity.profile = &t10_pi_type3_crc; |
Nicholas Bellinger | ba36c21 | 2016-04-09 03:04:42 +0000 | [diff] [blame] | 852 | integrity.tag_size = sizeof(u16) + sizeof(u32); |
| 853 | integrity.flags |= BLK_INTEGRITY_DEVICE_CAPABLE; |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 854 | break; |
| 855 | case NVME_NS_DPS_PI_TYPE1: |
| 856 | case NVME_NS_DPS_PI_TYPE2: |
| 857 | integrity.profile = &t10_pi_type1_crc; |
Nicholas Bellinger | ba36c21 | 2016-04-09 03:04:42 +0000 | [diff] [blame] | 858 | integrity.tag_size = sizeof(u16); |
| 859 | integrity.flags |= BLK_INTEGRITY_DEVICE_CAPABLE; |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 860 | break; |
| 861 | default: |
| 862 | integrity.profile = NULL; |
| 863 | break; |
| 864 | } |
| 865 | integrity.tuple_size = ns->ms; |
| 866 | blk_integrity_register(ns->disk, &integrity); |
| 867 | blk_queue_max_integrity_segments(ns->queue, 1); |
| 868 | } |
| 869 | #else |
| 870 | static void nvme_init_integrity(struct nvme_ns *ns) |
| 871 | { |
| 872 | } |
| 873 | #endif /* CONFIG_BLK_DEV_INTEGRITY */ |
| 874 | |
| 875 | static void nvme_config_discard(struct nvme_ns *ns) |
| 876 | { |
Keith Busch | 08095e7 | 2016-03-04 13:15:17 -0700 | [diff] [blame] | 877 | struct nvme_ctrl *ctrl = ns->ctrl; |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 878 | u32 logical_block_size = queue_logical_block_size(ns->queue); |
Keith Busch | 08095e7 | 2016-03-04 13:15:17 -0700 | [diff] [blame] | 879 | |
| 880 | if (ctrl->quirks & NVME_QUIRK_DISCARD_ZEROES) |
| 881 | ns->queue->limits.discard_zeroes_data = 1; |
| 882 | else |
| 883 | ns->queue->limits.discard_zeroes_data = 0; |
| 884 | |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 885 | ns->queue->limits.discard_alignment = logical_block_size; |
| 886 | ns->queue->limits.discard_granularity = logical_block_size; |
Minfei Huang | bd0fc28 | 2016-05-17 15:58:41 +0800 | [diff] [blame] | 887 | blk_queue_max_discard_sectors(ns->queue, UINT_MAX); |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 888 | queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, ns->queue); |
| 889 | } |
| 890 | |
Matias Bjørling | ac81bfa | 2016-09-16 14:25:04 +0200 | [diff] [blame] | 891 | static int nvme_revalidate_ns(struct nvme_ns *ns, struct nvme_id_ns **id) |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 892 | { |
Matias Bjørling | ac81bfa | 2016-09-16 14:25:04 +0200 | [diff] [blame] | 893 | if (nvme_identify_ns(ns->ctrl, ns->ns_id, id)) { |
Matias Bjørling | b0b4e09 | 2016-09-16 14:25:07 +0200 | [diff] [blame] | 894 | dev_warn(ns->ctrl->dev, "%s: Identify failure\n", __func__); |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 895 | return -ENODEV; |
| 896 | } |
Matias Bjørling | ac81bfa | 2016-09-16 14:25:04 +0200 | [diff] [blame] | 897 | |
| 898 | if ((*id)->ncap == 0) { |
| 899 | kfree(*id); |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 900 | return -ENODEV; |
| 901 | } |
| 902 | |
Gabriel Krisman Bertazi | 8ef2074 | 2016-10-19 09:51:05 -0600 | [diff] [blame] | 903 | if (ns->ctrl->vs >= NVME_VS(1, 1, 0)) |
Matias Bjørling | ac81bfa | 2016-09-16 14:25:04 +0200 | [diff] [blame] | 904 | memcpy(ns->eui, (*id)->eui64, sizeof(ns->eui)); |
Gabriel Krisman Bertazi | 8ef2074 | 2016-10-19 09:51:05 -0600 | [diff] [blame] | 905 | if (ns->ctrl->vs >= NVME_VS(1, 2, 0)) |
Matias Bjørling | ac81bfa | 2016-09-16 14:25:04 +0200 | [diff] [blame] | 906 | memcpy(ns->uuid, (*id)->nguid, sizeof(ns->uuid)); |
| 907 | |
| 908 | return 0; |
| 909 | } |
| 910 | |
| 911 | static void __nvme_revalidate_disk(struct gendisk *disk, struct nvme_id_ns *id) |
| 912 | { |
| 913 | struct nvme_ns *ns = disk->private_data; |
| 914 | u8 lbaf, pi_type; |
| 915 | u16 old_ms; |
| 916 | unsigned short bs; |
Keith Busch | 2b9b6e8 | 2015-12-22 10:10:45 -0700 | [diff] [blame] | 917 | |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 918 | old_ms = ns->ms; |
| 919 | lbaf = id->flbas & NVME_NS_FLBAS_LBA_MASK; |
| 920 | ns->lba_shift = id->lbaf[lbaf].ds; |
| 921 | ns->ms = le16_to_cpu(id->lbaf[lbaf].ms); |
| 922 | ns->ext = ns->ms && (id->flbas & NVME_NS_FLBAS_META_EXT); |
| 923 | |
| 924 | /* |
| 925 | * If identify namespace failed, use default 512 byte block size so |
| 926 | * block layer can use before failing read/write for 0 capacity. |
| 927 | */ |
| 928 | if (ns->lba_shift == 0) |
| 929 | ns->lba_shift = 9; |
| 930 | bs = 1 << ns->lba_shift; |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 931 | /* XXX: PI implementation requires metadata equal t10 pi tuple size */ |
| 932 | pi_type = ns->ms == sizeof(struct t10_pi_tuple) ? |
| 933 | id->dps & NVME_NS_DPS_PI_MASK : 0; |
| 934 | |
| 935 | blk_mq_freeze_queue(disk->queue); |
| 936 | if (blk_get_integrity(disk) && (ns->pi_type != pi_type || |
| 937 | ns->ms != old_ms || |
| 938 | bs != queue_logical_block_size(disk->queue) || |
| 939 | (ns->ms && ns->ext))) |
| 940 | blk_integrity_unregister(disk); |
| 941 | |
| 942 | ns->pi_type = pi_type; |
| 943 | blk_queue_logical_block_size(ns->queue, bs); |
| 944 | |
Keith Busch | 4b9d5b1 | 2015-11-20 09:13:30 +0100 | [diff] [blame] | 945 | if (ns->ms && !blk_get_integrity(disk) && !ns->ext) |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 946 | nvme_init_integrity(ns); |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 947 | if (ns->ms && !(ns->ms == 8 && ns->pi_type) && !blk_get_integrity(disk)) |
| 948 | set_capacity(disk, 0); |
| 949 | else |
| 950 | set_capacity(disk, le64_to_cpup(&id->nsze) << (ns->lba_shift - 9)); |
| 951 | |
| 952 | if (ns->ctrl->oncs & NVME_CTRL_ONCS_DSM) |
| 953 | nvme_config_discard(ns); |
| 954 | blk_mq_unfreeze_queue(disk->queue); |
Matias Bjørling | ac81bfa | 2016-09-16 14:25:04 +0200 | [diff] [blame] | 955 | } |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 956 | |
Matias Bjørling | ac81bfa | 2016-09-16 14:25:04 +0200 | [diff] [blame] | 957 | static int nvme_revalidate_disk(struct gendisk *disk) |
| 958 | { |
| 959 | struct nvme_ns *ns = disk->private_data; |
| 960 | struct nvme_id_ns *id = NULL; |
| 961 | int ret; |
| 962 | |
| 963 | if (test_bit(NVME_NS_DEAD, &ns->flags)) { |
| 964 | set_capacity(disk, 0); |
| 965 | return -ENODEV; |
| 966 | } |
| 967 | |
| 968 | ret = nvme_revalidate_ns(ns, &id); |
| 969 | if (ret) |
| 970 | return ret; |
| 971 | |
| 972 | __nvme_revalidate_disk(disk, id); |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 973 | kfree(id); |
Matias Bjørling | ac81bfa | 2016-09-16 14:25:04 +0200 | [diff] [blame] | 974 | |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 975 | return 0; |
| 976 | } |
| 977 | |
| 978 | static char nvme_pr_type(enum pr_type type) |
| 979 | { |
| 980 | switch (type) { |
| 981 | case PR_WRITE_EXCLUSIVE: |
| 982 | return 1; |
| 983 | case PR_EXCLUSIVE_ACCESS: |
| 984 | return 2; |
| 985 | case PR_WRITE_EXCLUSIVE_REG_ONLY: |
| 986 | return 3; |
| 987 | case PR_EXCLUSIVE_ACCESS_REG_ONLY: |
| 988 | return 4; |
| 989 | case PR_WRITE_EXCLUSIVE_ALL_REGS: |
| 990 | return 5; |
| 991 | case PR_EXCLUSIVE_ACCESS_ALL_REGS: |
| 992 | return 6; |
| 993 | default: |
| 994 | return 0; |
| 995 | } |
| 996 | }; |
| 997 | |
| 998 | static int nvme_pr_command(struct block_device *bdev, u32 cdw10, |
| 999 | u64 key, u64 sa_key, u8 op) |
| 1000 | { |
| 1001 | struct nvme_ns *ns = bdev->bd_disk->private_data; |
| 1002 | struct nvme_command c; |
| 1003 | u8 data[16] = { 0, }; |
| 1004 | |
| 1005 | put_unaligned_le64(key, &data[0]); |
| 1006 | put_unaligned_le64(sa_key, &data[8]); |
| 1007 | |
| 1008 | memset(&c, 0, sizeof(c)); |
| 1009 | c.common.opcode = op; |
| 1010 | c.common.nsid = cpu_to_le32(ns->ns_id); |
| 1011 | c.common.cdw10[0] = cpu_to_le32(cdw10); |
| 1012 | |
| 1013 | return nvme_submit_sync_cmd(ns->queue, &c, data, 16); |
| 1014 | } |
| 1015 | |
| 1016 | static int nvme_pr_register(struct block_device *bdev, u64 old, |
| 1017 | u64 new, unsigned flags) |
| 1018 | { |
| 1019 | u32 cdw10; |
| 1020 | |
| 1021 | if (flags & ~PR_FL_IGNORE_KEY) |
| 1022 | return -EOPNOTSUPP; |
| 1023 | |
| 1024 | cdw10 = old ? 2 : 0; |
| 1025 | cdw10 |= (flags & PR_FL_IGNORE_KEY) ? 1 << 3 : 0; |
| 1026 | cdw10 |= (1 << 30) | (1 << 31); /* PTPL=1 */ |
| 1027 | return nvme_pr_command(bdev, cdw10, old, new, nvme_cmd_resv_register); |
| 1028 | } |
| 1029 | |
| 1030 | static int nvme_pr_reserve(struct block_device *bdev, u64 key, |
| 1031 | enum pr_type type, unsigned flags) |
| 1032 | { |
| 1033 | u32 cdw10; |
| 1034 | |
| 1035 | if (flags & ~PR_FL_IGNORE_KEY) |
| 1036 | return -EOPNOTSUPP; |
| 1037 | |
| 1038 | cdw10 = nvme_pr_type(type) << 8; |
| 1039 | cdw10 |= ((flags & PR_FL_IGNORE_KEY) ? 1 << 3 : 0); |
| 1040 | return nvme_pr_command(bdev, cdw10, key, 0, nvme_cmd_resv_acquire); |
| 1041 | } |
| 1042 | |
| 1043 | static int nvme_pr_preempt(struct block_device *bdev, u64 old, u64 new, |
| 1044 | enum pr_type type, bool abort) |
| 1045 | { |
| 1046 | u32 cdw10 = nvme_pr_type(type) << 8 | abort ? 2 : 1; |
| 1047 | return nvme_pr_command(bdev, cdw10, old, new, nvme_cmd_resv_acquire); |
| 1048 | } |
| 1049 | |
| 1050 | static int nvme_pr_clear(struct block_device *bdev, u64 key) |
| 1051 | { |
Dan Carpenter | 8c0b391 | 2015-12-09 13:24:06 +0300 | [diff] [blame] | 1052 | u32 cdw10 = 1 | (key ? 1 << 3 : 0); |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 1053 | return nvme_pr_command(bdev, cdw10, key, 0, nvme_cmd_resv_register); |
| 1054 | } |
| 1055 | |
| 1056 | static int nvme_pr_release(struct block_device *bdev, u64 key, enum pr_type type) |
| 1057 | { |
| 1058 | u32 cdw10 = nvme_pr_type(type) << 8 | key ? 1 << 3 : 0; |
| 1059 | return nvme_pr_command(bdev, cdw10, key, 0, nvme_cmd_resv_release); |
| 1060 | } |
| 1061 | |
| 1062 | static const struct pr_ops nvme_pr_ops = { |
| 1063 | .pr_register = nvme_pr_register, |
| 1064 | .pr_reserve = nvme_pr_reserve, |
| 1065 | .pr_release = nvme_pr_release, |
| 1066 | .pr_preempt = nvme_pr_preempt, |
| 1067 | .pr_clear = nvme_pr_clear, |
| 1068 | }; |
| 1069 | |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 1070 | static const struct block_device_operations nvme_fops = { |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 1071 | .owner = THIS_MODULE, |
| 1072 | .ioctl = nvme_ioctl, |
| 1073 | .compat_ioctl = nvme_compat_ioctl, |
| 1074 | .open = nvme_open, |
| 1075 | .release = nvme_release, |
| 1076 | .getgeo = nvme_getgeo, |
| 1077 | .revalidate_disk= nvme_revalidate_disk, |
| 1078 | .pr_ops = &nvme_pr_ops, |
| 1079 | }; |
| 1080 | |
Christoph Hellwig | 5fd4ce1 | 2015-11-28 15:03:49 +0100 | [diff] [blame] | 1081 | static int nvme_wait_ready(struct nvme_ctrl *ctrl, u64 cap, bool enabled) |
| 1082 | { |
| 1083 | unsigned long timeout = |
| 1084 | ((NVME_CAP_TIMEOUT(cap) + 1) * HZ / 2) + jiffies; |
| 1085 | u32 csts, bit = enabled ? NVME_CSTS_RDY : 0; |
| 1086 | int ret; |
| 1087 | |
| 1088 | while ((ret = ctrl->ops->reg_read32(ctrl, NVME_REG_CSTS, &csts)) == 0) { |
Keith Busch | 0df1e4f | 2016-10-11 13:31:58 -0400 | [diff] [blame] | 1089 | if (csts == ~0) |
| 1090 | return -ENODEV; |
Christoph Hellwig | 5fd4ce1 | 2015-11-28 15:03:49 +0100 | [diff] [blame] | 1091 | if ((csts & NVME_CSTS_RDY) == bit) |
| 1092 | break; |
| 1093 | |
| 1094 | msleep(100); |
| 1095 | if (fatal_signal_pending(current)) |
| 1096 | return -EINTR; |
| 1097 | if (time_after(jiffies, timeout)) { |
Sagi Grimberg | 1b3c47c | 2016-02-10 08:51:15 -0700 | [diff] [blame] | 1098 | dev_err(ctrl->device, |
Christoph Hellwig | 5fd4ce1 | 2015-11-28 15:03:49 +0100 | [diff] [blame] | 1099 | "Device not ready; aborting %s\n", enabled ? |
| 1100 | "initialisation" : "reset"); |
| 1101 | return -ENODEV; |
| 1102 | } |
| 1103 | } |
| 1104 | |
| 1105 | return ret; |
| 1106 | } |
| 1107 | |
| 1108 | /* |
| 1109 | * If the device has been passed off to us in an enabled state, just clear |
| 1110 | * the enabled bit. The spec says we should set the 'shutdown notification |
| 1111 | * bits', but doing so may cause the device to complete commands to the |
| 1112 | * admin queue ... and we don't know what memory that might be pointing at! |
| 1113 | */ |
| 1114 | int nvme_disable_ctrl(struct nvme_ctrl *ctrl, u64 cap) |
| 1115 | { |
| 1116 | int ret; |
| 1117 | |
| 1118 | ctrl->ctrl_config &= ~NVME_CC_SHN_MASK; |
| 1119 | ctrl->ctrl_config &= ~NVME_CC_ENABLE; |
| 1120 | |
| 1121 | ret = ctrl->ops->reg_write32(ctrl, NVME_REG_CC, ctrl->ctrl_config); |
| 1122 | if (ret) |
| 1123 | return ret; |
Guilherme G. Piccoli | 54adc01 | 2016-06-14 18:22:41 -0300 | [diff] [blame] | 1124 | |
Guilherme G. Piccoli | 0aefd99 | 2016-12-28 22:13:15 -0200 | [diff] [blame] | 1125 | if (ctrl->quirks & NVME_QUIRK_DELAY_BEFORE_CHK_RDY) |
Guilherme G. Piccoli | 54adc01 | 2016-06-14 18:22:41 -0300 | [diff] [blame] | 1126 | msleep(NVME_QUIRK_DELAY_AMOUNT); |
| 1127 | |
Christoph Hellwig | 5fd4ce1 | 2015-11-28 15:03:49 +0100 | [diff] [blame] | 1128 | return nvme_wait_ready(ctrl, cap, false); |
| 1129 | } |
Ming Lin | 576d55d | 2016-02-10 10:03:32 -0800 | [diff] [blame] | 1130 | EXPORT_SYMBOL_GPL(nvme_disable_ctrl); |
Christoph Hellwig | 5fd4ce1 | 2015-11-28 15:03:49 +0100 | [diff] [blame] | 1131 | |
| 1132 | int nvme_enable_ctrl(struct nvme_ctrl *ctrl, u64 cap) |
| 1133 | { |
| 1134 | /* |
| 1135 | * Default to a 4K page size, with the intention to update this |
| 1136 | * path in the future to accomodate architectures with differing |
| 1137 | * kernel and IO page sizes. |
| 1138 | */ |
| 1139 | unsigned dev_page_min = NVME_CAP_MPSMIN(cap) + 12, page_shift = 12; |
| 1140 | int ret; |
| 1141 | |
| 1142 | if (page_shift < dev_page_min) { |
Sagi Grimberg | 1b3c47c | 2016-02-10 08:51:15 -0700 | [diff] [blame] | 1143 | dev_err(ctrl->device, |
Christoph Hellwig | 5fd4ce1 | 2015-11-28 15:03:49 +0100 | [diff] [blame] | 1144 | "Minimum device page size %u too large for host (%u)\n", |
| 1145 | 1 << dev_page_min, 1 << page_shift); |
| 1146 | return -ENODEV; |
| 1147 | } |
| 1148 | |
| 1149 | ctrl->page_size = 1 << page_shift; |
| 1150 | |
| 1151 | ctrl->ctrl_config = NVME_CC_CSS_NVM; |
| 1152 | ctrl->ctrl_config |= (page_shift - 12) << NVME_CC_MPS_SHIFT; |
| 1153 | ctrl->ctrl_config |= NVME_CC_ARB_RR | NVME_CC_SHN_NONE; |
| 1154 | ctrl->ctrl_config |= NVME_CC_IOSQES | NVME_CC_IOCQES; |
| 1155 | ctrl->ctrl_config |= NVME_CC_ENABLE; |
| 1156 | |
| 1157 | ret = ctrl->ops->reg_write32(ctrl, NVME_REG_CC, ctrl->ctrl_config); |
| 1158 | if (ret) |
| 1159 | return ret; |
| 1160 | return nvme_wait_ready(ctrl, cap, true); |
| 1161 | } |
Ming Lin | 576d55d | 2016-02-10 10:03:32 -0800 | [diff] [blame] | 1162 | EXPORT_SYMBOL_GPL(nvme_enable_ctrl); |
Christoph Hellwig | 5fd4ce1 | 2015-11-28 15:03:49 +0100 | [diff] [blame] | 1163 | |
| 1164 | int nvme_shutdown_ctrl(struct nvme_ctrl *ctrl) |
| 1165 | { |
| 1166 | unsigned long timeout = SHUTDOWN_TIMEOUT + jiffies; |
| 1167 | u32 csts; |
| 1168 | int ret; |
| 1169 | |
| 1170 | ctrl->ctrl_config &= ~NVME_CC_SHN_MASK; |
| 1171 | ctrl->ctrl_config |= NVME_CC_SHN_NORMAL; |
| 1172 | |
| 1173 | ret = ctrl->ops->reg_write32(ctrl, NVME_REG_CC, ctrl->ctrl_config); |
| 1174 | if (ret) |
| 1175 | return ret; |
| 1176 | |
| 1177 | while ((ret = ctrl->ops->reg_read32(ctrl, NVME_REG_CSTS, &csts)) == 0) { |
| 1178 | if ((csts & NVME_CSTS_SHST_MASK) == NVME_CSTS_SHST_CMPLT) |
| 1179 | break; |
| 1180 | |
| 1181 | msleep(100); |
| 1182 | if (fatal_signal_pending(current)) |
| 1183 | return -EINTR; |
| 1184 | if (time_after(jiffies, timeout)) { |
Sagi Grimberg | 1b3c47c | 2016-02-10 08:51:15 -0700 | [diff] [blame] | 1185 | dev_err(ctrl->device, |
Christoph Hellwig | 5fd4ce1 | 2015-11-28 15:03:49 +0100 | [diff] [blame] | 1186 | "Device shutdown incomplete; abort shutdown\n"); |
| 1187 | return -ENODEV; |
| 1188 | } |
| 1189 | } |
| 1190 | |
| 1191 | return ret; |
| 1192 | } |
Ming Lin | 576d55d | 2016-02-10 10:03:32 -0800 | [diff] [blame] | 1193 | EXPORT_SYMBOL_GPL(nvme_shutdown_ctrl); |
Christoph Hellwig | 5fd4ce1 | 2015-11-28 15:03:49 +0100 | [diff] [blame] | 1194 | |
Christoph Hellwig | da35825 | 2016-03-02 18:07:11 +0100 | [diff] [blame] | 1195 | static void nvme_set_queue_limits(struct nvme_ctrl *ctrl, |
| 1196 | struct request_queue *q) |
| 1197 | { |
Jens Axboe | 7c88cb0 | 2016-04-12 15:43:09 -0600 | [diff] [blame] | 1198 | bool vwc = false; |
| 1199 | |
Christoph Hellwig | da35825 | 2016-03-02 18:07:11 +0100 | [diff] [blame] | 1200 | if (ctrl->max_hw_sectors) { |
Christoph Hellwig | 45686b6 | 2016-03-02 18:07:12 +0100 | [diff] [blame] | 1201 | u32 max_segments = |
| 1202 | (ctrl->max_hw_sectors / (ctrl->page_size >> 9)) + 1; |
| 1203 | |
Christoph Hellwig | da35825 | 2016-03-02 18:07:11 +0100 | [diff] [blame] | 1204 | blk_queue_max_hw_sectors(q, ctrl->max_hw_sectors); |
Christoph Hellwig | 45686b6 | 2016-03-02 18:07:12 +0100 | [diff] [blame] | 1205 | blk_queue_max_segments(q, min_t(u32, max_segments, USHRT_MAX)); |
Christoph Hellwig | da35825 | 2016-03-02 18:07:11 +0100 | [diff] [blame] | 1206 | } |
| 1207 | if (ctrl->stripe_size) |
| 1208 | blk_queue_chunk_sectors(q, ctrl->stripe_size >> 9); |
Christoph Hellwig | da35825 | 2016-03-02 18:07:11 +0100 | [diff] [blame] | 1209 | blk_queue_virt_boundary(q, ctrl->page_size - 1); |
Jens Axboe | 7c88cb0 | 2016-04-12 15:43:09 -0600 | [diff] [blame] | 1210 | if (ctrl->vwc & NVME_CTRL_VWC_PRESENT) |
| 1211 | vwc = true; |
| 1212 | blk_queue_write_cache(q, vwc, vwc); |
Christoph Hellwig | da35825 | 2016-03-02 18:07:11 +0100 | [diff] [blame] | 1213 | } |
| 1214 | |
Christoph Hellwig | 7fd8930 | 2015-11-28 15:37:52 +0100 | [diff] [blame] | 1215 | /* |
| 1216 | * Initialize the cached copies of the Identify data and various controller |
| 1217 | * register in our nvme_ctrl structure. This should be called as soon as |
| 1218 | * the admin queue is fully up and running. |
| 1219 | */ |
| 1220 | int nvme_init_identify(struct nvme_ctrl *ctrl) |
| 1221 | { |
| 1222 | struct nvme_id_ctrl *id; |
| 1223 | u64 cap; |
| 1224 | int ret, page_shift; |
Christoph Hellwig | a229dbf | 2016-06-06 23:20:48 +0200 | [diff] [blame] | 1225 | u32 max_hw_sectors; |
Christoph Hellwig | 7fd8930 | 2015-11-28 15:37:52 +0100 | [diff] [blame] | 1226 | |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 1227 | ret = ctrl->ops->reg_read32(ctrl, NVME_REG_VS, &ctrl->vs); |
| 1228 | if (ret) { |
Sagi Grimberg | 1b3c47c | 2016-02-10 08:51:15 -0700 | [diff] [blame] | 1229 | dev_err(ctrl->device, "Reading VS failed (%d)\n", ret); |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 1230 | return ret; |
| 1231 | } |
| 1232 | |
Christoph Hellwig | 7fd8930 | 2015-11-28 15:37:52 +0100 | [diff] [blame] | 1233 | ret = ctrl->ops->reg_read64(ctrl, NVME_REG_CAP, &cap); |
| 1234 | if (ret) { |
Sagi Grimberg | 1b3c47c | 2016-02-10 08:51:15 -0700 | [diff] [blame] | 1235 | dev_err(ctrl->device, "Reading CAP failed (%d)\n", ret); |
Christoph Hellwig | 7fd8930 | 2015-11-28 15:37:52 +0100 | [diff] [blame] | 1236 | return ret; |
| 1237 | } |
| 1238 | page_shift = NVME_CAP_MPSMIN(cap) + 12; |
| 1239 | |
Gabriel Krisman Bertazi | 8ef2074 | 2016-10-19 09:51:05 -0600 | [diff] [blame] | 1240 | if (ctrl->vs >= NVME_VS(1, 1, 0)) |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 1241 | ctrl->subsystem = NVME_CAP_NSSRC(cap); |
| 1242 | |
Christoph Hellwig | 7fd8930 | 2015-11-28 15:37:52 +0100 | [diff] [blame] | 1243 | ret = nvme_identify_ctrl(ctrl, &id); |
| 1244 | if (ret) { |
Sagi Grimberg | 1b3c47c | 2016-02-10 08:51:15 -0700 | [diff] [blame] | 1245 | dev_err(ctrl->device, "Identify Controller failed (%d)\n", ret); |
Christoph Hellwig | 7fd8930 | 2015-11-28 15:37:52 +0100 | [diff] [blame] | 1246 | return -EIO; |
| 1247 | } |
| 1248 | |
Keith Busch | 118472a | 2016-02-18 09:57:48 -0700 | [diff] [blame] | 1249 | ctrl->vid = le16_to_cpu(id->vid); |
Christoph Hellwig | 7fd8930 | 2015-11-28 15:37:52 +0100 | [diff] [blame] | 1250 | ctrl->oncs = le16_to_cpup(&id->oncs); |
Christoph Hellwig | 6bf25d1 | 2015-11-20 09:36:44 +0100 | [diff] [blame] | 1251 | atomic_set(&ctrl->abort_limit, id->acl + 1); |
Christoph Hellwig | 7fd8930 | 2015-11-28 15:37:52 +0100 | [diff] [blame] | 1252 | ctrl->vwc = id->vwc; |
Ming Lin | 931e1c2 | 2016-02-26 13:24:19 -0800 | [diff] [blame] | 1253 | ctrl->cntlid = le16_to_cpup(&id->cntlid); |
Christoph Hellwig | 7fd8930 | 2015-11-28 15:37:52 +0100 | [diff] [blame] | 1254 | memcpy(ctrl->serial, id->sn, sizeof(id->sn)); |
| 1255 | memcpy(ctrl->model, id->mn, sizeof(id->mn)); |
| 1256 | memcpy(ctrl->firmware_rev, id->fr, sizeof(id->fr)); |
| 1257 | if (id->mdts) |
Christoph Hellwig | a229dbf | 2016-06-06 23:20:48 +0200 | [diff] [blame] | 1258 | max_hw_sectors = 1 << (id->mdts + page_shift - 9); |
Christoph Hellwig | 7fd8930 | 2015-11-28 15:37:52 +0100 | [diff] [blame] | 1259 | else |
Christoph Hellwig | a229dbf | 2016-06-06 23:20:48 +0200 | [diff] [blame] | 1260 | max_hw_sectors = UINT_MAX; |
| 1261 | ctrl->max_hw_sectors = |
| 1262 | min_not_zero(ctrl->max_hw_sectors, max_hw_sectors); |
Christoph Hellwig | 7fd8930 | 2015-11-28 15:37:52 +0100 | [diff] [blame] | 1263 | |
| 1264 | if ((ctrl->quirks & NVME_QUIRK_STRIPE_SIZE) && id->vs[3]) { |
| 1265 | unsigned int max_hw_sectors; |
| 1266 | |
| 1267 | ctrl->stripe_size = 1 << (id->vs[3] + page_shift); |
| 1268 | max_hw_sectors = ctrl->stripe_size >> (page_shift - 9); |
| 1269 | if (ctrl->max_hw_sectors) { |
| 1270 | ctrl->max_hw_sectors = min(max_hw_sectors, |
| 1271 | ctrl->max_hw_sectors); |
| 1272 | } else { |
| 1273 | ctrl->max_hw_sectors = max_hw_sectors; |
| 1274 | } |
| 1275 | } |
| 1276 | |
Christoph Hellwig | da35825 | 2016-03-02 18:07:11 +0100 | [diff] [blame] | 1277 | nvme_set_queue_limits(ctrl, ctrl->admin_q); |
Christoph Hellwig | 07bfcd0 | 2016-06-13 16:45:26 +0200 | [diff] [blame] | 1278 | ctrl->sgls = le32_to_cpu(id->sgls); |
Sagi Grimberg | 038bd4c | 2016-06-13 16:45:28 +0200 | [diff] [blame] | 1279 | ctrl->kas = le16_to_cpu(id->kas); |
Christoph Hellwig | 07bfcd0 | 2016-06-13 16:45:26 +0200 | [diff] [blame] | 1280 | |
| 1281 | if (ctrl->ops->is_fabrics) { |
| 1282 | ctrl->icdoff = le16_to_cpu(id->icdoff); |
| 1283 | ctrl->ioccsz = le32_to_cpu(id->ioccsz); |
| 1284 | ctrl->iorcsz = le32_to_cpu(id->iorcsz); |
| 1285 | ctrl->maxcmd = le16_to_cpu(id->maxcmd); |
| 1286 | |
| 1287 | /* |
| 1288 | * In fabrics we need to verify the cntlid matches the |
| 1289 | * admin connect |
| 1290 | */ |
| 1291 | if (ctrl->cntlid != le16_to_cpu(id->cntlid)) |
| 1292 | ret = -EINVAL; |
Sagi Grimberg | 038bd4c | 2016-06-13 16:45:28 +0200 | [diff] [blame] | 1293 | |
| 1294 | if (!ctrl->opts->discovery_nqn && !ctrl->kas) { |
| 1295 | dev_err(ctrl->dev, |
| 1296 | "keep-alive support is mandatory for fabrics\n"); |
| 1297 | ret = -EINVAL; |
| 1298 | } |
Christoph Hellwig | 07bfcd0 | 2016-06-13 16:45:26 +0200 | [diff] [blame] | 1299 | } else { |
| 1300 | ctrl->cntlid = le16_to_cpu(id->cntlid); |
| 1301 | } |
Christoph Hellwig | da35825 | 2016-03-02 18:07:11 +0100 | [diff] [blame] | 1302 | |
Christoph Hellwig | 7fd8930 | 2015-11-28 15:37:52 +0100 | [diff] [blame] | 1303 | kfree(id); |
Christoph Hellwig | 07bfcd0 | 2016-06-13 16:45:26 +0200 | [diff] [blame] | 1304 | return ret; |
Christoph Hellwig | 7fd8930 | 2015-11-28 15:37:52 +0100 | [diff] [blame] | 1305 | } |
Ming Lin | 576d55d | 2016-02-10 10:03:32 -0800 | [diff] [blame] | 1306 | EXPORT_SYMBOL_GPL(nvme_init_identify); |
Christoph Hellwig | 7fd8930 | 2015-11-28 15:37:52 +0100 | [diff] [blame] | 1307 | |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 1308 | static int nvme_dev_open(struct inode *inode, struct file *file) |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 1309 | { |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 1310 | struct nvme_ctrl *ctrl; |
| 1311 | int instance = iminor(inode); |
| 1312 | int ret = -ENODEV; |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 1313 | |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 1314 | spin_lock(&dev_list_lock); |
| 1315 | list_for_each_entry(ctrl, &nvme_ctrl_list, node) { |
| 1316 | if (ctrl->instance != instance) |
| 1317 | continue; |
| 1318 | |
| 1319 | if (!ctrl->admin_q) { |
| 1320 | ret = -EWOULDBLOCK; |
| 1321 | break; |
| 1322 | } |
| 1323 | if (!kref_get_unless_zero(&ctrl->kref)) |
| 1324 | break; |
| 1325 | file->private_data = ctrl; |
| 1326 | ret = 0; |
| 1327 | break; |
| 1328 | } |
| 1329 | spin_unlock(&dev_list_lock); |
| 1330 | |
| 1331 | return ret; |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 1332 | } |
| 1333 | |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 1334 | static int nvme_dev_release(struct inode *inode, struct file *file) |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 1335 | { |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 1336 | nvme_put_ctrl(file->private_data); |
| 1337 | return 0; |
Christoph Hellwig | 1673f1f | 2015-11-26 10:54:19 +0100 | [diff] [blame] | 1338 | } |
| 1339 | |
Christoph Hellwig | bfd8947 | 2015-12-24 15:27:01 +0100 | [diff] [blame] | 1340 | static int nvme_dev_user_cmd(struct nvme_ctrl *ctrl, void __user *argp) |
| 1341 | { |
| 1342 | struct nvme_ns *ns; |
| 1343 | int ret; |
| 1344 | |
| 1345 | mutex_lock(&ctrl->namespaces_mutex); |
| 1346 | if (list_empty(&ctrl->namespaces)) { |
| 1347 | ret = -ENOTTY; |
| 1348 | goto out_unlock; |
| 1349 | } |
| 1350 | |
| 1351 | ns = list_first_entry(&ctrl->namespaces, struct nvme_ns, list); |
| 1352 | if (ns != list_last_entry(&ctrl->namespaces, struct nvme_ns, list)) { |
Sagi Grimberg | 1b3c47c | 2016-02-10 08:51:15 -0700 | [diff] [blame] | 1353 | dev_warn(ctrl->device, |
Christoph Hellwig | bfd8947 | 2015-12-24 15:27:01 +0100 | [diff] [blame] | 1354 | "NVME_IOCTL_IO_CMD not supported when multiple namespaces present!\n"); |
| 1355 | ret = -EINVAL; |
| 1356 | goto out_unlock; |
| 1357 | } |
| 1358 | |
Sagi Grimberg | 1b3c47c | 2016-02-10 08:51:15 -0700 | [diff] [blame] | 1359 | dev_warn(ctrl->device, |
Christoph Hellwig | bfd8947 | 2015-12-24 15:27:01 +0100 | [diff] [blame] | 1360 | "using deprecated NVME_IOCTL_IO_CMD ioctl on the char device!\n"); |
| 1361 | kref_get(&ns->kref); |
| 1362 | mutex_unlock(&ctrl->namespaces_mutex); |
| 1363 | |
| 1364 | ret = nvme_user_cmd(ctrl, ns, argp); |
| 1365 | nvme_put_ns(ns); |
| 1366 | return ret; |
| 1367 | |
| 1368 | out_unlock: |
| 1369 | mutex_unlock(&ctrl->namespaces_mutex); |
| 1370 | return ret; |
| 1371 | } |
| 1372 | |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 1373 | static long nvme_dev_ioctl(struct file *file, unsigned int cmd, |
| 1374 | unsigned long arg) |
| 1375 | { |
| 1376 | struct nvme_ctrl *ctrl = file->private_data; |
| 1377 | void __user *argp = (void __user *)arg; |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 1378 | |
| 1379 | switch (cmd) { |
| 1380 | case NVME_IOCTL_ADMIN_CMD: |
| 1381 | return nvme_user_cmd(ctrl, NULL, argp); |
| 1382 | case NVME_IOCTL_IO_CMD: |
Christoph Hellwig | bfd8947 | 2015-12-24 15:27:01 +0100 | [diff] [blame] | 1383 | return nvme_dev_user_cmd(ctrl, argp); |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 1384 | case NVME_IOCTL_RESET: |
Sagi Grimberg | 1b3c47c | 2016-02-10 08:51:15 -0700 | [diff] [blame] | 1385 | dev_warn(ctrl->device, "resetting controller\n"); |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 1386 | return ctrl->ops->reset_ctrl(ctrl); |
| 1387 | case NVME_IOCTL_SUBSYS_RESET: |
| 1388 | return nvme_reset_subsystem(ctrl); |
Keith Busch | 9ec3bb2 | 2016-04-29 15:45:18 -0600 | [diff] [blame] | 1389 | case NVME_IOCTL_RESCAN: |
| 1390 | nvme_queue_scan(ctrl); |
| 1391 | return 0; |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 1392 | default: |
| 1393 | return -ENOTTY; |
| 1394 | } |
| 1395 | } |
| 1396 | |
| 1397 | static const struct file_operations nvme_dev_fops = { |
| 1398 | .owner = THIS_MODULE, |
| 1399 | .open = nvme_dev_open, |
| 1400 | .release = nvme_dev_release, |
| 1401 | .unlocked_ioctl = nvme_dev_ioctl, |
| 1402 | .compat_ioctl = nvme_dev_ioctl, |
| 1403 | }; |
| 1404 | |
| 1405 | static ssize_t nvme_sysfs_reset(struct device *dev, |
| 1406 | struct device_attribute *attr, const char *buf, |
| 1407 | size_t count) |
| 1408 | { |
| 1409 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); |
| 1410 | int ret; |
| 1411 | |
| 1412 | ret = ctrl->ops->reset_ctrl(ctrl); |
| 1413 | if (ret < 0) |
| 1414 | return ret; |
| 1415 | return count; |
| 1416 | } |
| 1417 | static DEVICE_ATTR(reset_controller, S_IWUSR, NULL, nvme_sysfs_reset); |
| 1418 | |
Keith Busch | 9ec3bb2 | 2016-04-29 15:45:18 -0600 | [diff] [blame] | 1419 | static ssize_t nvme_sysfs_rescan(struct device *dev, |
| 1420 | struct device_attribute *attr, const char *buf, |
| 1421 | size_t count) |
| 1422 | { |
| 1423 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); |
| 1424 | |
| 1425 | nvme_queue_scan(ctrl); |
| 1426 | return count; |
| 1427 | } |
| 1428 | static DEVICE_ATTR(rescan_controller, S_IWUSR, NULL, nvme_sysfs_rescan); |
| 1429 | |
Keith Busch | 118472a | 2016-02-18 09:57:48 -0700 | [diff] [blame] | 1430 | static ssize_t wwid_show(struct device *dev, struct device_attribute *attr, |
| 1431 | char *buf) |
| 1432 | { |
Simon A. F. Lund | 40267ef | 2016-09-16 14:25:08 +0200 | [diff] [blame] | 1433 | struct nvme_ns *ns = nvme_get_ns_from_dev(dev); |
Keith Busch | 118472a | 2016-02-18 09:57:48 -0700 | [diff] [blame] | 1434 | struct nvme_ctrl *ctrl = ns->ctrl; |
| 1435 | int serial_len = sizeof(ctrl->serial); |
| 1436 | int model_len = sizeof(ctrl->model); |
| 1437 | |
| 1438 | if (memchr_inv(ns->uuid, 0, sizeof(ns->uuid))) |
| 1439 | return sprintf(buf, "eui.%16phN\n", ns->uuid); |
| 1440 | |
| 1441 | if (memchr_inv(ns->eui, 0, sizeof(ns->eui))) |
| 1442 | return sprintf(buf, "eui.%8phN\n", ns->eui); |
| 1443 | |
| 1444 | while (ctrl->serial[serial_len - 1] == ' ') |
| 1445 | serial_len--; |
| 1446 | while (ctrl->model[model_len - 1] == ' ') |
| 1447 | model_len--; |
| 1448 | |
| 1449 | return sprintf(buf, "nvme.%04x-%*phN-%*phN-%08x\n", ctrl->vid, |
| 1450 | serial_len, ctrl->serial, model_len, ctrl->model, ns->ns_id); |
| 1451 | } |
| 1452 | static DEVICE_ATTR(wwid, S_IRUGO, wwid_show, NULL); |
| 1453 | |
Keith Busch | 2b9b6e8 | 2015-12-22 10:10:45 -0700 | [diff] [blame] | 1454 | static ssize_t uuid_show(struct device *dev, struct device_attribute *attr, |
| 1455 | char *buf) |
| 1456 | { |
Simon A. F. Lund | 40267ef | 2016-09-16 14:25:08 +0200 | [diff] [blame] | 1457 | struct nvme_ns *ns = nvme_get_ns_from_dev(dev); |
Keith Busch | 2b9b6e8 | 2015-12-22 10:10:45 -0700 | [diff] [blame] | 1458 | return sprintf(buf, "%pU\n", ns->uuid); |
| 1459 | } |
| 1460 | static DEVICE_ATTR(uuid, S_IRUGO, uuid_show, NULL); |
| 1461 | |
| 1462 | static ssize_t eui_show(struct device *dev, struct device_attribute *attr, |
| 1463 | char *buf) |
| 1464 | { |
Simon A. F. Lund | 40267ef | 2016-09-16 14:25:08 +0200 | [diff] [blame] | 1465 | struct nvme_ns *ns = nvme_get_ns_from_dev(dev); |
Keith Busch | 2b9b6e8 | 2015-12-22 10:10:45 -0700 | [diff] [blame] | 1466 | return sprintf(buf, "%8phd\n", ns->eui); |
| 1467 | } |
| 1468 | static DEVICE_ATTR(eui, S_IRUGO, eui_show, NULL); |
| 1469 | |
| 1470 | static ssize_t nsid_show(struct device *dev, struct device_attribute *attr, |
| 1471 | char *buf) |
| 1472 | { |
Simon A. F. Lund | 40267ef | 2016-09-16 14:25:08 +0200 | [diff] [blame] | 1473 | struct nvme_ns *ns = nvme_get_ns_from_dev(dev); |
Keith Busch | 2b9b6e8 | 2015-12-22 10:10:45 -0700 | [diff] [blame] | 1474 | return sprintf(buf, "%d\n", ns->ns_id); |
| 1475 | } |
| 1476 | static DEVICE_ATTR(nsid, S_IRUGO, nsid_show, NULL); |
| 1477 | |
| 1478 | static struct attribute *nvme_ns_attrs[] = { |
Keith Busch | 118472a | 2016-02-18 09:57:48 -0700 | [diff] [blame] | 1479 | &dev_attr_wwid.attr, |
Keith Busch | 2b9b6e8 | 2015-12-22 10:10:45 -0700 | [diff] [blame] | 1480 | &dev_attr_uuid.attr, |
| 1481 | &dev_attr_eui.attr, |
| 1482 | &dev_attr_nsid.attr, |
| 1483 | NULL, |
| 1484 | }; |
| 1485 | |
Ming Lin | 1a353d8 | 2016-06-13 16:45:24 +0200 | [diff] [blame] | 1486 | static umode_t nvme_ns_attrs_are_visible(struct kobject *kobj, |
Keith Busch | 2b9b6e8 | 2015-12-22 10:10:45 -0700 | [diff] [blame] | 1487 | struct attribute *a, int n) |
| 1488 | { |
| 1489 | struct device *dev = container_of(kobj, struct device, kobj); |
Simon A. F. Lund | 40267ef | 2016-09-16 14:25:08 +0200 | [diff] [blame] | 1490 | struct nvme_ns *ns = nvme_get_ns_from_dev(dev); |
Keith Busch | 2b9b6e8 | 2015-12-22 10:10:45 -0700 | [diff] [blame] | 1491 | |
| 1492 | if (a == &dev_attr_uuid.attr) { |
| 1493 | if (!memchr_inv(ns->uuid, 0, sizeof(ns->uuid))) |
| 1494 | return 0; |
| 1495 | } |
| 1496 | if (a == &dev_attr_eui.attr) { |
| 1497 | if (!memchr_inv(ns->eui, 0, sizeof(ns->eui))) |
| 1498 | return 0; |
| 1499 | } |
| 1500 | return a->mode; |
| 1501 | } |
| 1502 | |
| 1503 | static const struct attribute_group nvme_ns_attr_group = { |
| 1504 | .attrs = nvme_ns_attrs, |
Ming Lin | 1a353d8 | 2016-06-13 16:45:24 +0200 | [diff] [blame] | 1505 | .is_visible = nvme_ns_attrs_are_visible, |
Keith Busch | 2b9b6e8 | 2015-12-22 10:10:45 -0700 | [diff] [blame] | 1506 | }; |
| 1507 | |
Ming Lin | 931e1c2 | 2016-02-26 13:24:19 -0800 | [diff] [blame] | 1508 | #define nvme_show_str_function(field) \ |
Keith Busch | 779ff756 | 2016-01-12 15:09:31 -0700 | [diff] [blame] | 1509 | static ssize_t field##_show(struct device *dev, \ |
| 1510 | struct device_attribute *attr, char *buf) \ |
| 1511 | { \ |
| 1512 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); \ |
| 1513 | return sprintf(buf, "%.*s\n", (int)sizeof(ctrl->field), ctrl->field); \ |
| 1514 | } \ |
| 1515 | static DEVICE_ATTR(field, S_IRUGO, field##_show, NULL); |
| 1516 | |
Ming Lin | 931e1c2 | 2016-02-26 13:24:19 -0800 | [diff] [blame] | 1517 | #define nvme_show_int_function(field) \ |
| 1518 | static ssize_t field##_show(struct device *dev, \ |
| 1519 | struct device_attribute *attr, char *buf) \ |
| 1520 | { \ |
| 1521 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); \ |
| 1522 | return sprintf(buf, "%d\n", ctrl->field); \ |
| 1523 | } \ |
| 1524 | static DEVICE_ATTR(field, S_IRUGO, field##_show, NULL); |
| 1525 | |
| 1526 | nvme_show_str_function(model); |
| 1527 | nvme_show_str_function(serial); |
| 1528 | nvme_show_str_function(firmware_rev); |
| 1529 | nvme_show_int_function(cntlid); |
Keith Busch | 779ff756 | 2016-01-12 15:09:31 -0700 | [diff] [blame] | 1530 | |
Ming Lin | 1a353d8 | 2016-06-13 16:45:24 +0200 | [diff] [blame] | 1531 | static ssize_t nvme_sysfs_delete(struct device *dev, |
| 1532 | struct device_attribute *attr, const char *buf, |
| 1533 | size_t count) |
| 1534 | { |
| 1535 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); |
| 1536 | |
| 1537 | if (device_remove_file_self(dev, attr)) |
| 1538 | ctrl->ops->delete_ctrl(ctrl); |
| 1539 | return count; |
| 1540 | } |
| 1541 | static DEVICE_ATTR(delete_controller, S_IWUSR, NULL, nvme_sysfs_delete); |
| 1542 | |
| 1543 | static ssize_t nvme_sysfs_show_transport(struct device *dev, |
| 1544 | struct device_attribute *attr, |
| 1545 | char *buf) |
| 1546 | { |
| 1547 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); |
| 1548 | |
| 1549 | return snprintf(buf, PAGE_SIZE, "%s\n", ctrl->ops->name); |
| 1550 | } |
| 1551 | static DEVICE_ATTR(transport, S_IRUGO, nvme_sysfs_show_transport, NULL); |
| 1552 | |
| 1553 | static ssize_t nvme_sysfs_show_subsysnqn(struct device *dev, |
| 1554 | struct device_attribute *attr, |
| 1555 | char *buf) |
| 1556 | { |
| 1557 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); |
| 1558 | |
| 1559 | return snprintf(buf, PAGE_SIZE, "%s\n", |
| 1560 | ctrl->ops->get_subsysnqn(ctrl)); |
| 1561 | } |
| 1562 | static DEVICE_ATTR(subsysnqn, S_IRUGO, nvme_sysfs_show_subsysnqn, NULL); |
| 1563 | |
| 1564 | static ssize_t nvme_sysfs_show_address(struct device *dev, |
| 1565 | struct device_attribute *attr, |
| 1566 | char *buf) |
| 1567 | { |
| 1568 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); |
| 1569 | |
| 1570 | return ctrl->ops->get_address(ctrl, buf, PAGE_SIZE); |
| 1571 | } |
| 1572 | static DEVICE_ATTR(address, S_IRUGO, nvme_sysfs_show_address, NULL); |
| 1573 | |
Keith Busch | 779ff756 | 2016-01-12 15:09:31 -0700 | [diff] [blame] | 1574 | static struct attribute *nvme_dev_attrs[] = { |
| 1575 | &dev_attr_reset_controller.attr, |
Keith Busch | 9ec3bb2 | 2016-04-29 15:45:18 -0600 | [diff] [blame] | 1576 | &dev_attr_rescan_controller.attr, |
Keith Busch | 779ff756 | 2016-01-12 15:09:31 -0700 | [diff] [blame] | 1577 | &dev_attr_model.attr, |
| 1578 | &dev_attr_serial.attr, |
| 1579 | &dev_attr_firmware_rev.attr, |
Ming Lin | 931e1c2 | 2016-02-26 13:24:19 -0800 | [diff] [blame] | 1580 | &dev_attr_cntlid.attr, |
Ming Lin | 1a353d8 | 2016-06-13 16:45:24 +0200 | [diff] [blame] | 1581 | &dev_attr_delete_controller.attr, |
| 1582 | &dev_attr_transport.attr, |
| 1583 | &dev_attr_subsysnqn.attr, |
| 1584 | &dev_attr_address.attr, |
Keith Busch | 779ff756 | 2016-01-12 15:09:31 -0700 | [diff] [blame] | 1585 | NULL |
| 1586 | }; |
| 1587 | |
Ming Lin | 1a353d8 | 2016-06-13 16:45:24 +0200 | [diff] [blame] | 1588 | #define CHECK_ATTR(ctrl, a, name) \ |
| 1589 | if ((a) == &dev_attr_##name.attr && \ |
| 1590 | !(ctrl)->ops->get_##name) \ |
| 1591 | return 0 |
| 1592 | |
| 1593 | static umode_t nvme_dev_attrs_are_visible(struct kobject *kobj, |
| 1594 | struct attribute *a, int n) |
| 1595 | { |
| 1596 | struct device *dev = container_of(kobj, struct device, kobj); |
| 1597 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); |
| 1598 | |
| 1599 | if (a == &dev_attr_delete_controller.attr) { |
| 1600 | if (!ctrl->ops->delete_ctrl) |
| 1601 | return 0; |
| 1602 | } |
| 1603 | |
| 1604 | CHECK_ATTR(ctrl, a, subsysnqn); |
| 1605 | CHECK_ATTR(ctrl, a, address); |
| 1606 | |
| 1607 | return a->mode; |
| 1608 | } |
| 1609 | |
Keith Busch | 779ff756 | 2016-01-12 15:09:31 -0700 | [diff] [blame] | 1610 | static struct attribute_group nvme_dev_attrs_group = { |
Ming Lin | 1a353d8 | 2016-06-13 16:45:24 +0200 | [diff] [blame] | 1611 | .attrs = nvme_dev_attrs, |
| 1612 | .is_visible = nvme_dev_attrs_are_visible, |
Keith Busch | 779ff756 | 2016-01-12 15:09:31 -0700 | [diff] [blame] | 1613 | }; |
| 1614 | |
| 1615 | static const struct attribute_group *nvme_dev_attr_groups[] = { |
| 1616 | &nvme_dev_attrs_group, |
| 1617 | NULL, |
| 1618 | }; |
| 1619 | |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 1620 | static int ns_cmp(void *priv, struct list_head *a, struct list_head *b) |
| 1621 | { |
| 1622 | struct nvme_ns *nsa = container_of(a, struct nvme_ns, list); |
| 1623 | struct nvme_ns *nsb = container_of(b, struct nvme_ns, list); |
| 1624 | |
| 1625 | return nsa->ns_id - nsb->ns_id; |
| 1626 | } |
| 1627 | |
Keith Busch | 32f0c4a | 2016-07-13 11:45:02 -0600 | [diff] [blame] | 1628 | static struct nvme_ns *nvme_find_get_ns(struct nvme_ctrl *ctrl, unsigned nsid) |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 1629 | { |
Keith Busch | 32f0c4a | 2016-07-13 11:45:02 -0600 | [diff] [blame] | 1630 | struct nvme_ns *ns, *ret = NULL; |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 1631 | |
Keith Busch | 32f0c4a | 2016-07-13 11:45:02 -0600 | [diff] [blame] | 1632 | mutex_lock(&ctrl->namespaces_mutex); |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 1633 | list_for_each_entry(ns, &ctrl->namespaces, list) { |
Keith Busch | 32f0c4a | 2016-07-13 11:45:02 -0600 | [diff] [blame] | 1634 | if (ns->ns_id == nsid) { |
| 1635 | kref_get(&ns->kref); |
| 1636 | ret = ns; |
| 1637 | break; |
| 1638 | } |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 1639 | if (ns->ns_id > nsid) |
| 1640 | break; |
| 1641 | } |
Keith Busch | 32f0c4a | 2016-07-13 11:45:02 -0600 | [diff] [blame] | 1642 | mutex_unlock(&ctrl->namespaces_mutex); |
| 1643 | return ret; |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 1644 | } |
| 1645 | |
| 1646 | static void nvme_alloc_ns(struct nvme_ctrl *ctrl, unsigned nsid) |
| 1647 | { |
| 1648 | struct nvme_ns *ns; |
| 1649 | struct gendisk *disk; |
Matias Bjørling | ac81bfa | 2016-09-16 14:25:04 +0200 | [diff] [blame] | 1650 | struct nvme_id_ns *id; |
| 1651 | char disk_name[DISK_NAME_LEN]; |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 1652 | int node = dev_to_node(ctrl->dev); |
| 1653 | |
| 1654 | ns = kzalloc_node(sizeof(*ns), GFP_KERNEL, node); |
| 1655 | if (!ns) |
| 1656 | return; |
| 1657 | |
Keith Busch | 075790e | 2016-02-24 09:15:53 -0700 | [diff] [blame] | 1658 | ns->instance = ida_simple_get(&ctrl->ns_ida, 1, 0, GFP_KERNEL); |
| 1659 | if (ns->instance < 0) |
| 1660 | goto out_free_ns; |
| 1661 | |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 1662 | ns->queue = blk_mq_init_queue(ctrl->tagset); |
| 1663 | if (IS_ERR(ns->queue)) |
Keith Busch | 075790e | 2016-02-24 09:15:53 -0700 | [diff] [blame] | 1664 | goto out_release_instance; |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 1665 | queue_flag_set_unlocked(QUEUE_FLAG_NONROT, ns->queue); |
| 1666 | ns->queue->queuedata = ns; |
| 1667 | ns->ctrl = ctrl; |
| 1668 | |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 1669 | kref_init(&ns->kref); |
| 1670 | ns->ns_id = nsid; |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 1671 | ns->lba_shift = 9; /* set to a default value for 512 until disk is validated */ |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 1672 | |
| 1673 | blk_queue_logical_block_size(ns->queue, 1 << ns->lba_shift); |
Christoph Hellwig | da35825 | 2016-03-02 18:07:11 +0100 | [diff] [blame] | 1674 | nvme_set_queue_limits(ctrl, ns->queue); |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 1675 | |
Matias Bjørling | ac81bfa | 2016-09-16 14:25:04 +0200 | [diff] [blame] | 1676 | sprintf(disk_name, "nvme%dn%d", ctrl->instance, ns->instance); |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 1677 | |
Matias Bjørling | ac81bfa | 2016-09-16 14:25:04 +0200 | [diff] [blame] | 1678 | if (nvme_revalidate_ns(ns, &id)) |
| 1679 | goto out_free_queue; |
| 1680 | |
| 1681 | if (nvme_nvm_ns_supported(ns, id)) { |
Simon A. F. Lund | 40267ef | 2016-09-16 14:25:08 +0200 | [diff] [blame] | 1682 | if (nvme_nvm_register(ns, disk_name, node, |
| 1683 | &nvme_ns_attr_group)) { |
Matias Bjørling | b0b4e09 | 2016-09-16 14:25:07 +0200 | [diff] [blame] | 1684 | dev_warn(ctrl->dev, "%s: LightNVM init failure\n", |
| 1685 | __func__); |
Matias Bjørling | ac81bfa | 2016-09-16 14:25:04 +0200 | [diff] [blame] | 1686 | goto out_free_id; |
| 1687 | } |
Matias Bjørling | ac81bfa | 2016-09-16 14:25:04 +0200 | [diff] [blame] | 1688 | } else { |
| 1689 | disk = alloc_disk_node(0, node); |
| 1690 | if (!disk) |
| 1691 | goto out_free_id; |
| 1692 | |
| 1693 | disk->fops = &nvme_fops; |
| 1694 | disk->private_data = ns; |
| 1695 | disk->queue = ns->queue; |
| 1696 | disk->flags = GENHD_FL_EXT_DEVT; |
| 1697 | memcpy(disk->disk_name, disk_name, DISK_NAME_LEN); |
| 1698 | ns->disk = disk; |
| 1699 | |
| 1700 | __nvme_revalidate_disk(disk, id); |
| 1701 | } |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 1702 | |
Keith Busch | 32f0c4a | 2016-07-13 11:45:02 -0600 | [diff] [blame] | 1703 | mutex_lock(&ctrl->namespaces_mutex); |
| 1704 | list_add_tail(&ns->list, &ctrl->namespaces); |
| 1705 | mutex_unlock(&ctrl->namespaces_mutex); |
| 1706 | |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 1707 | kref_get(&ctrl->kref); |
Matias Bjørling | ac81bfa | 2016-09-16 14:25:04 +0200 | [diff] [blame] | 1708 | |
| 1709 | kfree(id); |
| 1710 | |
Matias Bjørling | b0b4e09 | 2016-09-16 14:25:07 +0200 | [diff] [blame] | 1711 | if (ns->ndev) |
Keith Busch | 2b9b6e8 | 2015-12-22 10:10:45 -0700 | [diff] [blame] | 1712 | return; |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 1713 | |
Dan Williams | 0d52c756 | 2016-06-15 19:44:20 -0700 | [diff] [blame] | 1714 | device_add_disk(ctrl->device, ns->disk); |
Keith Busch | 2b9b6e8 | 2015-12-22 10:10:45 -0700 | [diff] [blame] | 1715 | if (sysfs_create_group(&disk_to_dev(ns->disk)->kobj, |
| 1716 | &nvme_ns_attr_group)) |
| 1717 | pr_warn("%s: failed to create sysfs group for identification\n", |
| 1718 | ns->disk->disk_name); |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 1719 | return; |
Matias Bjørling | ac81bfa | 2016-09-16 14:25:04 +0200 | [diff] [blame] | 1720 | out_free_id: |
| 1721 | kfree(id); |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 1722 | out_free_queue: |
| 1723 | blk_cleanup_queue(ns->queue); |
Keith Busch | 075790e | 2016-02-24 09:15:53 -0700 | [diff] [blame] | 1724 | out_release_instance: |
| 1725 | ida_simple_remove(&ctrl->ns_ida, ns->instance); |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 1726 | out_free_ns: |
| 1727 | kfree(ns); |
| 1728 | } |
| 1729 | |
| 1730 | static void nvme_ns_remove(struct nvme_ns *ns) |
| 1731 | { |
Keith Busch | 646017a | 2016-02-24 09:15:54 -0700 | [diff] [blame] | 1732 | if (test_and_set_bit(NVME_NS_REMOVING, &ns->flags)) |
| 1733 | return; |
| 1734 | |
Matias Bjørling | b0b4e09 | 2016-09-16 14:25:07 +0200 | [diff] [blame] | 1735 | if (ns->disk && ns->disk->flags & GENHD_FL_UP) { |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 1736 | if (blk_get_integrity(ns->disk)) |
| 1737 | blk_integrity_unregister(ns->disk); |
Keith Busch | 2b9b6e8 | 2015-12-22 10:10:45 -0700 | [diff] [blame] | 1738 | sysfs_remove_group(&disk_to_dev(ns->disk)->kobj, |
| 1739 | &nvme_ns_attr_group); |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 1740 | del_gendisk(ns->disk); |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 1741 | blk_mq_abort_requeue_list(ns->queue); |
| 1742 | blk_cleanup_queue(ns->queue); |
| 1743 | } |
Keith Busch | 32f0c4a | 2016-07-13 11:45:02 -0600 | [diff] [blame] | 1744 | |
| 1745 | mutex_lock(&ns->ctrl->namespaces_mutex); |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 1746 | list_del_init(&ns->list); |
Keith Busch | 32f0c4a | 2016-07-13 11:45:02 -0600 | [diff] [blame] | 1747 | mutex_unlock(&ns->ctrl->namespaces_mutex); |
| 1748 | |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 1749 | nvme_put_ns(ns); |
| 1750 | } |
| 1751 | |
Keith Busch | 540c801 | 2015-10-22 15:45:06 -0600 | [diff] [blame] | 1752 | static void nvme_validate_ns(struct nvme_ctrl *ctrl, unsigned nsid) |
| 1753 | { |
| 1754 | struct nvme_ns *ns; |
| 1755 | |
Keith Busch | 32f0c4a | 2016-07-13 11:45:02 -0600 | [diff] [blame] | 1756 | ns = nvme_find_get_ns(ctrl, nsid); |
Keith Busch | 540c801 | 2015-10-22 15:45:06 -0600 | [diff] [blame] | 1757 | if (ns) { |
Matias Bjørling | b0b4e09 | 2016-09-16 14:25:07 +0200 | [diff] [blame] | 1758 | if (ns->disk && revalidate_disk(ns->disk)) |
Keith Busch | 540c801 | 2015-10-22 15:45:06 -0600 | [diff] [blame] | 1759 | nvme_ns_remove(ns); |
Keith Busch | 32f0c4a | 2016-07-13 11:45:02 -0600 | [diff] [blame] | 1760 | nvme_put_ns(ns); |
Keith Busch | 540c801 | 2015-10-22 15:45:06 -0600 | [diff] [blame] | 1761 | } else |
| 1762 | nvme_alloc_ns(ctrl, nsid); |
| 1763 | } |
| 1764 | |
Sunad Bhandary | 47b0e50 | 2016-05-27 15:59:43 +0530 | [diff] [blame] | 1765 | static void nvme_remove_invalid_namespaces(struct nvme_ctrl *ctrl, |
| 1766 | unsigned nsid) |
| 1767 | { |
| 1768 | struct nvme_ns *ns, *next; |
| 1769 | |
| 1770 | list_for_each_entry_safe(ns, next, &ctrl->namespaces, list) { |
| 1771 | if (ns->ns_id > nsid) |
| 1772 | nvme_ns_remove(ns); |
| 1773 | } |
| 1774 | } |
| 1775 | |
Keith Busch | 540c801 | 2015-10-22 15:45:06 -0600 | [diff] [blame] | 1776 | static int nvme_scan_ns_list(struct nvme_ctrl *ctrl, unsigned nn) |
| 1777 | { |
| 1778 | struct nvme_ns *ns; |
| 1779 | __le32 *ns_list; |
| 1780 | unsigned i, j, nsid, prev = 0, num_lists = DIV_ROUND_UP(nn, 1024); |
| 1781 | int ret = 0; |
| 1782 | |
| 1783 | ns_list = kzalloc(0x1000, GFP_KERNEL); |
| 1784 | if (!ns_list) |
| 1785 | return -ENOMEM; |
| 1786 | |
| 1787 | for (i = 0; i < num_lists; i++) { |
| 1788 | ret = nvme_identify_ns_list(ctrl, prev, ns_list); |
| 1789 | if (ret) |
Sunad Bhandary | 47b0e50 | 2016-05-27 15:59:43 +0530 | [diff] [blame] | 1790 | goto free; |
Keith Busch | 540c801 | 2015-10-22 15:45:06 -0600 | [diff] [blame] | 1791 | |
| 1792 | for (j = 0; j < min(nn, 1024U); j++) { |
| 1793 | nsid = le32_to_cpu(ns_list[j]); |
| 1794 | if (!nsid) |
| 1795 | goto out; |
| 1796 | |
| 1797 | nvme_validate_ns(ctrl, nsid); |
| 1798 | |
| 1799 | while (++prev < nsid) { |
Keith Busch | 32f0c4a | 2016-07-13 11:45:02 -0600 | [diff] [blame] | 1800 | ns = nvme_find_get_ns(ctrl, prev); |
| 1801 | if (ns) { |
Keith Busch | 540c801 | 2015-10-22 15:45:06 -0600 | [diff] [blame] | 1802 | nvme_ns_remove(ns); |
Keith Busch | 32f0c4a | 2016-07-13 11:45:02 -0600 | [diff] [blame] | 1803 | nvme_put_ns(ns); |
| 1804 | } |
Keith Busch | 540c801 | 2015-10-22 15:45:06 -0600 | [diff] [blame] | 1805 | } |
| 1806 | } |
| 1807 | nn -= j; |
| 1808 | } |
| 1809 | out: |
Sunad Bhandary | 47b0e50 | 2016-05-27 15:59:43 +0530 | [diff] [blame] | 1810 | nvme_remove_invalid_namespaces(ctrl, prev); |
| 1811 | free: |
Keith Busch | 540c801 | 2015-10-22 15:45:06 -0600 | [diff] [blame] | 1812 | kfree(ns_list); |
| 1813 | return ret; |
| 1814 | } |
| 1815 | |
Christoph Hellwig | 5955be2 | 2016-04-26 13:51:59 +0200 | [diff] [blame] | 1816 | static void nvme_scan_ns_sequential(struct nvme_ctrl *ctrl, unsigned nn) |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 1817 | { |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 1818 | unsigned i; |
| 1819 | |
Keith Busch | 540c801 | 2015-10-22 15:45:06 -0600 | [diff] [blame] | 1820 | for (i = 1; i <= nn; i++) |
| 1821 | nvme_validate_ns(ctrl, i); |
| 1822 | |
Sunad Bhandary | 47b0e50 | 2016-05-27 15:59:43 +0530 | [diff] [blame] | 1823 | nvme_remove_invalid_namespaces(ctrl, nn); |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 1824 | } |
| 1825 | |
Christoph Hellwig | 5955be2 | 2016-04-26 13:51:59 +0200 | [diff] [blame] | 1826 | static void nvme_scan_work(struct work_struct *work) |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 1827 | { |
Christoph Hellwig | 5955be2 | 2016-04-26 13:51:59 +0200 | [diff] [blame] | 1828 | struct nvme_ctrl *ctrl = |
| 1829 | container_of(work, struct nvme_ctrl, scan_work); |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 1830 | struct nvme_id_ctrl *id; |
Keith Busch | 540c801 | 2015-10-22 15:45:06 -0600 | [diff] [blame] | 1831 | unsigned nn; |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 1832 | |
Christoph Hellwig | 5955be2 | 2016-04-26 13:51:59 +0200 | [diff] [blame] | 1833 | if (ctrl->state != NVME_CTRL_LIVE) |
| 1834 | return; |
| 1835 | |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 1836 | if (nvme_identify_ctrl(ctrl, &id)) |
| 1837 | return; |
Keith Busch | 540c801 | 2015-10-22 15:45:06 -0600 | [diff] [blame] | 1838 | |
| 1839 | nn = le32_to_cpu(id->nn); |
Gabriel Krisman Bertazi | 8ef2074 | 2016-10-19 09:51:05 -0600 | [diff] [blame] | 1840 | if (ctrl->vs >= NVME_VS(1, 1, 0) && |
Keith Busch | 540c801 | 2015-10-22 15:45:06 -0600 | [diff] [blame] | 1841 | !(ctrl->quirks & NVME_QUIRK_IDENTIFY_CNS)) { |
| 1842 | if (!nvme_scan_ns_list(ctrl, nn)) |
| 1843 | goto done; |
| 1844 | } |
Christoph Hellwig | 5955be2 | 2016-04-26 13:51:59 +0200 | [diff] [blame] | 1845 | nvme_scan_ns_sequential(ctrl, nn); |
Keith Busch | 540c801 | 2015-10-22 15:45:06 -0600 | [diff] [blame] | 1846 | done: |
Keith Busch | 32f0c4a | 2016-07-13 11:45:02 -0600 | [diff] [blame] | 1847 | mutex_lock(&ctrl->namespaces_mutex); |
Keith Busch | 540c801 | 2015-10-22 15:45:06 -0600 | [diff] [blame] | 1848 | list_sort(NULL, &ctrl->namespaces, ns_cmp); |
Christoph Hellwig | 69d3b8a | 2015-12-24 15:27:00 +0100 | [diff] [blame] | 1849 | mutex_unlock(&ctrl->namespaces_mutex); |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 1850 | kfree(id); |
| 1851 | } |
Christoph Hellwig | 5955be2 | 2016-04-26 13:51:59 +0200 | [diff] [blame] | 1852 | |
| 1853 | void nvme_queue_scan(struct nvme_ctrl *ctrl) |
| 1854 | { |
| 1855 | /* |
| 1856 | * Do not queue new scan work when a controller is reset during |
| 1857 | * removal. |
| 1858 | */ |
| 1859 | if (ctrl->state == NVME_CTRL_LIVE) |
| 1860 | schedule_work(&ctrl->scan_work); |
| 1861 | } |
| 1862 | EXPORT_SYMBOL_GPL(nvme_queue_scan); |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 1863 | |
Keith Busch | 32f0c4a | 2016-07-13 11:45:02 -0600 | [diff] [blame] | 1864 | /* |
| 1865 | * This function iterates the namespace list unlocked to allow recovery from |
| 1866 | * controller failure. It is up to the caller to ensure the namespace list is |
| 1867 | * not modified by scan work while this function is executing. |
| 1868 | */ |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 1869 | void nvme_remove_namespaces(struct nvme_ctrl *ctrl) |
| 1870 | { |
| 1871 | struct nvme_ns *ns, *next; |
| 1872 | |
Keith Busch | 0ff9d4e | 2016-05-12 08:37:14 -0600 | [diff] [blame] | 1873 | /* |
| 1874 | * The dead states indicates the controller was not gracefully |
| 1875 | * disconnected. In that case, we won't be able to flush any data while |
| 1876 | * removing the namespaces' disks; fail all the queues now to avoid |
| 1877 | * potentially having to clean up the failed sync later. |
| 1878 | */ |
| 1879 | if (ctrl->state == NVME_CTRL_DEAD) |
| 1880 | nvme_kill_queues(ctrl); |
| 1881 | |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 1882 | list_for_each_entry_safe(ns, next, &ctrl->namespaces, list) |
| 1883 | nvme_ns_remove(ns); |
| 1884 | } |
Ming Lin | 576d55d | 2016-02-10 10:03:32 -0800 | [diff] [blame] | 1885 | EXPORT_SYMBOL_GPL(nvme_remove_namespaces); |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 1886 | |
Christoph Hellwig | f866fc4 | 2016-04-26 13:52:00 +0200 | [diff] [blame] | 1887 | static void nvme_async_event_work(struct work_struct *work) |
| 1888 | { |
| 1889 | struct nvme_ctrl *ctrl = |
| 1890 | container_of(work, struct nvme_ctrl, async_event_work); |
| 1891 | |
| 1892 | spin_lock_irq(&ctrl->lock); |
| 1893 | while (ctrl->event_limit > 0) { |
| 1894 | int aer_idx = --ctrl->event_limit; |
| 1895 | |
| 1896 | spin_unlock_irq(&ctrl->lock); |
| 1897 | ctrl->ops->submit_async_event(ctrl, aer_idx); |
| 1898 | spin_lock_irq(&ctrl->lock); |
| 1899 | } |
| 1900 | spin_unlock_irq(&ctrl->lock); |
| 1901 | } |
| 1902 | |
| 1903 | void nvme_complete_async_event(struct nvme_ctrl *ctrl, |
| 1904 | struct nvme_completion *cqe) |
| 1905 | { |
| 1906 | u16 status = le16_to_cpu(cqe->status) >> 1; |
| 1907 | u32 result = le32_to_cpu(cqe->result); |
| 1908 | |
| 1909 | if (status == NVME_SC_SUCCESS || status == NVME_SC_ABORT_REQ) { |
| 1910 | ++ctrl->event_limit; |
| 1911 | schedule_work(&ctrl->async_event_work); |
| 1912 | } |
| 1913 | |
| 1914 | if (status != NVME_SC_SUCCESS) |
| 1915 | return; |
| 1916 | |
| 1917 | switch (result & 0xff07) { |
| 1918 | case NVME_AER_NOTICE_NS_CHANGED: |
| 1919 | dev_info(ctrl->device, "rescanning\n"); |
| 1920 | nvme_queue_scan(ctrl); |
| 1921 | break; |
| 1922 | default: |
| 1923 | dev_warn(ctrl->device, "async event result %08x\n", result); |
| 1924 | } |
| 1925 | } |
| 1926 | EXPORT_SYMBOL_GPL(nvme_complete_async_event); |
| 1927 | |
| 1928 | void nvme_queue_async_events(struct nvme_ctrl *ctrl) |
| 1929 | { |
| 1930 | ctrl->event_limit = NVME_NR_AERS; |
| 1931 | schedule_work(&ctrl->async_event_work); |
| 1932 | } |
| 1933 | EXPORT_SYMBOL_GPL(nvme_queue_async_events); |
| 1934 | |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 1935 | static DEFINE_IDA(nvme_instance_ida); |
| 1936 | |
| 1937 | static int nvme_set_instance(struct nvme_ctrl *ctrl) |
| 1938 | { |
| 1939 | int instance, error; |
| 1940 | |
| 1941 | do { |
| 1942 | if (!ida_pre_get(&nvme_instance_ida, GFP_KERNEL)) |
| 1943 | return -ENODEV; |
| 1944 | |
| 1945 | spin_lock(&dev_list_lock); |
| 1946 | error = ida_get_new(&nvme_instance_ida, &instance); |
| 1947 | spin_unlock(&dev_list_lock); |
| 1948 | } while (error == -EAGAIN); |
| 1949 | |
| 1950 | if (error) |
| 1951 | return -ENODEV; |
| 1952 | |
| 1953 | ctrl->instance = instance; |
| 1954 | return 0; |
| 1955 | } |
| 1956 | |
| 1957 | static void nvme_release_instance(struct nvme_ctrl *ctrl) |
| 1958 | { |
| 1959 | spin_lock(&dev_list_lock); |
| 1960 | ida_remove(&nvme_instance_ida, ctrl->instance); |
| 1961 | spin_unlock(&dev_list_lock); |
| 1962 | } |
| 1963 | |
Keith Busch | 53029b0 | 2015-11-28 15:41:02 +0100 | [diff] [blame] | 1964 | void nvme_uninit_ctrl(struct nvme_ctrl *ctrl) |
Ming Lin | 576d55d | 2016-02-10 10:03:32 -0800 | [diff] [blame] | 1965 | { |
Christoph Hellwig | f866fc4 | 2016-04-26 13:52:00 +0200 | [diff] [blame] | 1966 | flush_work(&ctrl->async_event_work); |
Christoph Hellwig | 5955be2 | 2016-04-26 13:51:59 +0200 | [diff] [blame] | 1967 | flush_work(&ctrl->scan_work); |
| 1968 | nvme_remove_namespaces(ctrl); |
| 1969 | |
Keith Busch | 53029b0 | 2015-11-28 15:41:02 +0100 | [diff] [blame] | 1970 | device_destroy(nvme_class, MKDEV(nvme_char_major, ctrl->instance)); |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 1971 | |
| 1972 | spin_lock(&dev_list_lock); |
| 1973 | list_del(&ctrl->node); |
| 1974 | spin_unlock(&dev_list_lock); |
Keith Busch | 53029b0 | 2015-11-28 15:41:02 +0100 | [diff] [blame] | 1975 | } |
Ming Lin | 576d55d | 2016-02-10 10:03:32 -0800 | [diff] [blame] | 1976 | EXPORT_SYMBOL_GPL(nvme_uninit_ctrl); |
Keith Busch | 53029b0 | 2015-11-28 15:41:02 +0100 | [diff] [blame] | 1977 | |
| 1978 | static void nvme_free_ctrl(struct kref *kref) |
| 1979 | { |
| 1980 | struct nvme_ctrl *ctrl = container_of(kref, struct nvme_ctrl, kref); |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 1981 | |
| 1982 | put_device(ctrl->device); |
| 1983 | nvme_release_instance(ctrl); |
Keith Busch | 075790e | 2016-02-24 09:15:53 -0700 | [diff] [blame] | 1984 | ida_destroy(&ctrl->ns_ida); |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 1985 | |
| 1986 | ctrl->ops->free_ctrl(ctrl); |
| 1987 | } |
| 1988 | |
| 1989 | void nvme_put_ctrl(struct nvme_ctrl *ctrl) |
| 1990 | { |
| 1991 | kref_put(&ctrl->kref, nvme_free_ctrl); |
| 1992 | } |
Ming Lin | 576d55d | 2016-02-10 10:03:32 -0800 | [diff] [blame] | 1993 | EXPORT_SYMBOL_GPL(nvme_put_ctrl); |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 1994 | |
| 1995 | /* |
| 1996 | * Initialize a NVMe controller structures. This needs to be called during |
| 1997 | * earliest initialization so that we have the initialized structured around |
| 1998 | * during probing. |
| 1999 | */ |
| 2000 | int nvme_init_ctrl(struct nvme_ctrl *ctrl, struct device *dev, |
| 2001 | const struct nvme_ctrl_ops *ops, unsigned long quirks) |
| 2002 | { |
| 2003 | int ret; |
| 2004 | |
Christoph Hellwig | bb8d261 | 2016-04-26 13:51:57 +0200 | [diff] [blame] | 2005 | ctrl->state = NVME_CTRL_NEW; |
| 2006 | spin_lock_init(&ctrl->lock); |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 2007 | INIT_LIST_HEAD(&ctrl->namespaces); |
Christoph Hellwig | 69d3b8a | 2015-12-24 15:27:00 +0100 | [diff] [blame] | 2008 | mutex_init(&ctrl->namespaces_mutex); |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 2009 | kref_init(&ctrl->kref); |
| 2010 | ctrl->dev = dev; |
| 2011 | ctrl->ops = ops; |
| 2012 | ctrl->quirks = quirks; |
Christoph Hellwig | 5955be2 | 2016-04-26 13:51:59 +0200 | [diff] [blame] | 2013 | INIT_WORK(&ctrl->scan_work, nvme_scan_work); |
Christoph Hellwig | f866fc4 | 2016-04-26 13:52:00 +0200 | [diff] [blame] | 2014 | INIT_WORK(&ctrl->async_event_work, nvme_async_event_work); |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 2015 | |
| 2016 | ret = nvme_set_instance(ctrl); |
| 2017 | if (ret) |
| 2018 | goto out; |
| 2019 | |
Keith Busch | 779ff756 | 2016-01-12 15:09:31 -0700 | [diff] [blame] | 2020 | ctrl->device = device_create_with_groups(nvme_class, ctrl->dev, |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 2021 | MKDEV(nvme_char_major, ctrl->instance), |
Christoph Hellwig | f4f0f63 | 2016-02-09 12:44:03 -0700 | [diff] [blame] | 2022 | ctrl, nvme_dev_attr_groups, |
Keith Busch | 779ff756 | 2016-01-12 15:09:31 -0700 | [diff] [blame] | 2023 | "nvme%d", ctrl->instance); |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 2024 | if (IS_ERR(ctrl->device)) { |
| 2025 | ret = PTR_ERR(ctrl->device); |
| 2026 | goto out_release_instance; |
| 2027 | } |
| 2028 | get_device(ctrl->device); |
Keith Busch | 075790e | 2016-02-24 09:15:53 -0700 | [diff] [blame] | 2029 | ida_init(&ctrl->ns_ida); |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 2030 | |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 2031 | spin_lock(&dev_list_lock); |
| 2032 | list_add_tail(&ctrl->node, &nvme_ctrl_list); |
| 2033 | spin_unlock(&dev_list_lock); |
| 2034 | |
| 2035 | return 0; |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 2036 | out_release_instance: |
| 2037 | nvme_release_instance(ctrl); |
| 2038 | out: |
| 2039 | return ret; |
| 2040 | } |
Ming Lin | 576d55d | 2016-02-10 10:03:32 -0800 | [diff] [blame] | 2041 | EXPORT_SYMBOL_GPL(nvme_init_ctrl); |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 2042 | |
Keith Busch | 69d9a99 | 2016-02-24 09:15:56 -0700 | [diff] [blame] | 2043 | /** |
| 2044 | * nvme_kill_queues(): Ends all namespace queues |
| 2045 | * @ctrl: the dead controller that needs to end |
| 2046 | * |
| 2047 | * Call this function when the driver determines it is unable to get the |
| 2048 | * controller in a state capable of servicing IO. |
| 2049 | */ |
| 2050 | void nvme_kill_queues(struct nvme_ctrl *ctrl) |
| 2051 | { |
| 2052 | struct nvme_ns *ns; |
| 2053 | |
Keith Busch | 32f0c4a | 2016-07-13 11:45:02 -0600 | [diff] [blame] | 2054 | mutex_lock(&ctrl->namespaces_mutex); |
| 2055 | list_for_each_entry(ns, &ctrl->namespaces, list) { |
Keith Busch | 69d9a99 | 2016-02-24 09:15:56 -0700 | [diff] [blame] | 2056 | /* |
| 2057 | * Revalidating a dead namespace sets capacity to 0. This will |
| 2058 | * end buffered writers dirtying pages that can't be synced. |
| 2059 | */ |
Matias Bjørling | b0b4e09 | 2016-09-16 14:25:07 +0200 | [diff] [blame] | 2060 | if (ns->disk && !test_and_set_bit(NVME_NS_DEAD, &ns->flags)) |
Keith Busch | 69d9a99 | 2016-02-24 09:15:56 -0700 | [diff] [blame] | 2061 | revalidate_disk(ns->disk); |
| 2062 | |
| 2063 | blk_set_queue_dying(ns->queue); |
| 2064 | blk_mq_abort_requeue_list(ns->queue); |
| 2065 | blk_mq_start_stopped_hw_queues(ns->queue, true); |
Keith Busch | 69d9a99 | 2016-02-24 09:15:56 -0700 | [diff] [blame] | 2066 | } |
Keith Busch | 32f0c4a | 2016-07-13 11:45:02 -0600 | [diff] [blame] | 2067 | mutex_unlock(&ctrl->namespaces_mutex); |
Keith Busch | 69d9a99 | 2016-02-24 09:15:56 -0700 | [diff] [blame] | 2068 | } |
Linus Torvalds | 237045f | 2016-03-18 17:13:31 -0700 | [diff] [blame] | 2069 | EXPORT_SYMBOL_GPL(nvme_kill_queues); |
Keith Busch | 69d9a99 | 2016-02-24 09:15:56 -0700 | [diff] [blame] | 2070 | |
Keith Busch | 2564626 | 2016-01-04 09:10:57 -0700 | [diff] [blame] | 2071 | void nvme_stop_queues(struct nvme_ctrl *ctrl) |
Sagi Grimberg | 363c9aa | 2015-12-24 15:26:59 +0100 | [diff] [blame] | 2072 | { |
| 2073 | struct nvme_ns *ns; |
| 2074 | |
Keith Busch | 32f0c4a | 2016-07-13 11:45:02 -0600 | [diff] [blame] | 2075 | mutex_lock(&ctrl->namespaces_mutex); |
| 2076 | list_for_each_entry(ns, &ctrl->namespaces, list) { |
Sagi Grimberg | 363c9aa | 2015-12-24 15:26:59 +0100 | [diff] [blame] | 2077 | spin_lock_irq(ns->queue->queue_lock); |
| 2078 | queue_flag_set(QUEUE_FLAG_STOPPED, ns->queue); |
| 2079 | spin_unlock_irq(ns->queue->queue_lock); |
| 2080 | |
| 2081 | blk_mq_cancel_requeue_work(ns->queue); |
| 2082 | blk_mq_stop_hw_queues(ns->queue); |
| 2083 | } |
Keith Busch | 32f0c4a | 2016-07-13 11:45:02 -0600 | [diff] [blame] | 2084 | mutex_unlock(&ctrl->namespaces_mutex); |
Sagi Grimberg | 363c9aa | 2015-12-24 15:26:59 +0100 | [diff] [blame] | 2085 | } |
Ming Lin | 576d55d | 2016-02-10 10:03:32 -0800 | [diff] [blame] | 2086 | EXPORT_SYMBOL_GPL(nvme_stop_queues); |
Sagi Grimberg | 363c9aa | 2015-12-24 15:26:59 +0100 | [diff] [blame] | 2087 | |
Keith Busch | 2564626 | 2016-01-04 09:10:57 -0700 | [diff] [blame] | 2088 | void nvme_start_queues(struct nvme_ctrl *ctrl) |
Sagi Grimberg | 363c9aa | 2015-12-24 15:26:59 +0100 | [diff] [blame] | 2089 | { |
| 2090 | struct nvme_ns *ns; |
| 2091 | |
Keith Busch | 32f0c4a | 2016-07-13 11:45:02 -0600 | [diff] [blame] | 2092 | mutex_lock(&ctrl->namespaces_mutex); |
| 2093 | list_for_each_entry(ns, &ctrl->namespaces, list) { |
Sagi Grimberg | 363c9aa | 2015-12-24 15:26:59 +0100 | [diff] [blame] | 2094 | queue_flag_clear_unlocked(QUEUE_FLAG_STOPPED, ns->queue); |
Sagi Grimberg | 363c9aa | 2015-12-24 15:26:59 +0100 | [diff] [blame] | 2095 | blk_mq_start_stopped_hw_queues(ns->queue, true); |
| 2096 | blk_mq_kick_requeue_list(ns->queue); |
| 2097 | } |
Keith Busch | 32f0c4a | 2016-07-13 11:45:02 -0600 | [diff] [blame] | 2098 | mutex_unlock(&ctrl->namespaces_mutex); |
Sagi Grimberg | 363c9aa | 2015-12-24 15:26:59 +0100 | [diff] [blame] | 2099 | } |
Ming Lin | 576d55d | 2016-02-10 10:03:32 -0800 | [diff] [blame] | 2100 | EXPORT_SYMBOL_GPL(nvme_start_queues); |
Sagi Grimberg | 363c9aa | 2015-12-24 15:26:59 +0100 | [diff] [blame] | 2101 | |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 2102 | int __init nvme_core_init(void) |
| 2103 | { |
| 2104 | int result; |
| 2105 | |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 2106 | result = __register_chrdev(nvme_char_major, 0, NVME_MINORS, "nvme", |
| 2107 | &nvme_dev_fops); |
| 2108 | if (result < 0) |
NeilBrown | b09dcf5 | 2016-07-13 11:03:58 -0700 | [diff] [blame] | 2109 | return result; |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 2110 | else if (result > 0) |
| 2111 | nvme_char_major = result; |
| 2112 | |
| 2113 | nvme_class = class_create(THIS_MODULE, "nvme"); |
| 2114 | if (IS_ERR(nvme_class)) { |
| 2115 | result = PTR_ERR(nvme_class); |
| 2116 | goto unregister_chrdev; |
| 2117 | } |
| 2118 | |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 2119 | return 0; |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 2120 | |
| 2121 | unregister_chrdev: |
| 2122 | __unregister_chrdev(nvme_char_major, 0, NVME_MINORS, "nvme"); |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 2123 | return result; |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 2124 | } |
| 2125 | |
| 2126 | void nvme_core_exit(void) |
| 2127 | { |
Christoph Hellwig | f3ca80f | 2015-11-28 15:40:19 +0100 | [diff] [blame] | 2128 | class_destroy(nvme_class); |
| 2129 | __unregister_chrdev(nvme_char_major, 0, NVME_MINORS, "nvme"); |
Christoph Hellwig | 5bae7f7 | 2015-11-28 15:39:07 +0100 | [diff] [blame] | 2130 | } |
Ming Lin | 576d55d | 2016-02-10 10:03:32 -0800 | [diff] [blame] | 2131 | |
| 2132 | MODULE_LICENSE("GPL"); |
| 2133 | MODULE_VERSION("1.0"); |
| 2134 | module_init(nvme_core_init); |
| 2135 | module_exit(nvme_core_exit); |