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1 /* SPDX-License-Identifier: GPL-2.0 */

2 /*

4 */

6 #ifndef _NVME_H

7 #define _NVME_H

9 #include <linux/nvme.h>

10 #include <linux/cdev.h>

11 #include <linux/pci.h>

12 #include <linux/kref.h>

13 #include <linux/blk-mq.h>

14 #include <linux/lightnvm.h>

15 #include <linux/sed-opal.h>

16 #include <linux/fault-inject.h>

17 #include <linux/rcupdate.h>

18 #include <linux/wait.h>

19 #include <linux/t10-pi.h>

21 #include <trace/events/block.h>

23 extern unsigned int nvme_io_timeout;

24 #define NVME_IO_TIMEOUT (nvme_io_timeout * HZ)

26 extern unsigned int admin_timeout;

27 #define ADMIN_TIMEOUT (admin_timeout * HZ)

29 #define NVME_DEFAULT_KATO 5

30 #define NVME_KATO_GRACE 10

32 #ifdef CONFIG_ARCH_NO_SG_CHAIN

33 #define NVME_INLINE_SG_CNT 0

34 #define NVME_INLINE_METADATA_SG_CNT 0

35 #else

36 #define NVME_INLINE_SG_CNT 2

37 #define NVME_INLINE_METADATA_SG_CNT 1

38 #endif

40 /*

41 * Default to a 4K page size, with the intention to update this

42 * path in the future to accommodate architectures with differing

43 * kernel and IO page sizes.

44 */

45 #define NVME_CTRL_PAGE_SHIFT 12

46 #define NVME_CTRL_PAGE_SIZE (1 << NVME_CTRL_PAGE_SHIFT)

48 extern struct workqueue_struct *nvme_wq;

49 extern struct workqueue_struct *nvme_reset_wq;

50 extern struct workqueue_struct *nvme_delete_wq;

52 enum {

53 NVME_NS_LBA = 0,

54 NVME_NS_LIGHTNVM = 1,

55 };

57 /*

58 * List of workarounds for devices that required behavior not specified in

59 * the standard.

60 */

61 enum nvme_quirks {

62 /*

63 * Prefers I/O aligned to a stripe size specified in a vendor

64 * specific Identify field.

65 */

66 NVME_QUIRK_STRIPE_SIZE = (1 << 0),

68 /*

69 * The controller doesn't handle Identify value others than 0 or 1

70 * correctly.

71 */

72 NVME_QUIRK_IDENTIFY_CNS = (1 << 1),

74 /*

75 * The controller deterministically returns O's on reads to

76 * logical blocks that deallocate was called on.

77 */

78 NVME_QUIRK_DEALLOCATE_ZEROES = (1 << 2),

80 /*

81 * The controller needs a delay before starts checking the device

82 * readiness, which is done by reading the NVME_CSTS_RDY bit.

83 */

84 NVME_QUIRK_DELAY_BEFORE_CHK_RDY = (1 << 3),

86 /*

87 * APST should not be used.

88 */

89 NVME_QUIRK_NO_APST = (1 << 4),

91 /*

92 * The deepest sleep state should not be used.

93 */

94 NVME_QUIRK_NO_DEEPEST_PS = (1 << 5),

96 /*

97 * Supports the LighNVM command set if indicated in vs[1].

98 */

99 NVME_QUIRK_LIGHTNVM = (1 << 6),

100

101 /*

102 * Set MEDIUM priority on SQ creation

103 */

104 NVME_QUIRK_MEDIUM_PRIO_SQ = (1 << 7),

105

106 /*

107 * Ignore device provided subnqn.

108 */

109 NVME_QUIRK_IGNORE_DEV_SUBNQN = (1 << 8),

110

111 /*

112 * Broken Write Zeroes.

113 */

114 NVME_QUIRK_DISABLE_WRITE_ZEROES = (1 << 9),

115

116 /*

117 * Force simple suspend/resume path.

118 */

119 NVME_QUIRK_SIMPLE_SUSPEND = (1 << 10),

120

121 /*

122 * Use only one interrupt vector for all queues

123 */

124 NVME_QUIRK_SINGLE_VECTOR = (1 << 11),

125

126 /*

127 * Use non-standard 128 bytes SQEs.

128 */

129 NVME_QUIRK_128_BYTES_SQES = (1 << 12),

130

131 /*

132 * Prevent tag overlap between queues

133 */

134 NVME_QUIRK_SHARED_TAGS = (1 << 13),

135

136 /*

137 * Don't change the value of the temperature threshold feature

138 */

139 NVME_QUIRK_NO_TEMP_THRESH_CHANGE = (1 << 14),

140 };

141

142 /*

143 * Common request structure for NVMe passthrough. All drivers must have

144 * this structure as the first member of their request-private data.

145 */

146 struct nvme_request {

147 struct nvme_command *cmd;

148 union nvme_result result;

149 u8 retries;

150 u8 flags;

151 u16 status;

152 struct nvme_ctrl *ctrl;

153 };

154

155 /*

156 * Mark a bio as coming in through the mpath node.

157 */

158 #define REQ_NVME_MPATH REQ_DRV

159

160 enum {

161 NVME_REQ_CANCELLED = (1 << 0),

162 NVME_REQ_USERCMD = (1 << 1),

163 };

164

165 static inline struct nvme_request *nvme_req(struct request *req)

166 {

167 return blk_mq_rq_to_pdu(req);

168 }

169

170 static inline u16 nvme_req_qid(struct request *req)

171 {

172 if (!req->rq_disk)

173 return 0;

174 return blk_mq_unique_tag_to_hwq(blk_mq_unique_tag(req)) + 1;

175 }

176

177 /* The below value is the specific amount of delay needed before checking

178 * readiness in case of the PCI_DEVICE(0x1c58, 0x0003), which needs the

179 * NVME_QUIRK_DELAY_BEFORE_CHK_RDY quirk enabled. The value (in ms) was

180 * found empirically.

181 */

182 #define NVME_QUIRK_DELAY_AMOUNT 2300

183

184 /*

185 * enum nvme_ctrl_state: Controller state

186 *

187 * @NVME_CTRL_NEW: New controller just allocated, initial state

188 * @NVME_CTRL_LIVE: Controller is connected and I/O capable

189 * @NVME_CTRL_RESETTING: Controller is resetting (or scheduled reset)

190 * @NVME_CTRL_CONNECTING: Controller is disconnected, now connecting the

191 * transport

192 * @NVME_CTRL_DELETING: Controller is deleting (or scheduled deletion)

193 * @NVME_CTRL_DELETING_NOIO: Controller is deleting and I/O is not

194 * disabled/failed immediately. This state comes

195 * after all async event processing took place and

196 * before ns removal and the controller deletion

197 * progress

198 * @NVME_CTRL_DEAD: Controller is non-present/unresponsive during

199 * shutdown or removal. In this case we forcibly

200 * kill all inflight I/O as they have no chance to

201 * complete

202 */

203 enum nvme_ctrl_state {

204 NVME_CTRL_NEW,

205 NVME_CTRL_LIVE,

206 NVME_CTRL_RESETTING,

207 NVME_CTRL_CONNECTING,

208 NVME_CTRL_DELETING,

209 NVME_CTRL_DELETING_NOIO,

210 NVME_CTRL_DEAD,

211 };

212

213 struct nvme_fault_inject {

214 #ifdef CONFIG_FAULT_INJECTION_DEBUG_FS

215 struct fault_attr attr;

216 struct dentry *parent;

217 bool dont_retry; /* DNR, do not retry */

218 u16 status; /* status code */

219 #endif

220 };

221

222 struct nvme_cel {

223 struct list_head entry;

224 struct nvme_effects_log log;

225 u8 csi;

226 };

227

228 struct nvme_ctrl {

229 bool comp_seen;

230 enum nvme_ctrl_state state;

231 bool identified;

232 spinlock_t lock;

233 struct mutex scan_lock;

234 const struct nvme_ctrl_ops *ops;

235 struct request_queue *admin_q;

236 struct request_queue *connect_q;

237 struct request_queue *fabrics_q;

238 struct device *dev;

239 int instance;

240 int numa_node;

241 struct blk_mq_tag_set *tagset;

242 struct blk_mq_tag_set *admin_tagset;

243 struct list_head namespaces;

244 struct rw_semaphore namespaces_rwsem;

245 struct device ctrl_device;

246 struct device *device; /* char device */

247 struct cdev cdev;

248 struct work_struct reset_work;

249 struct work_struct delete_work;

250 wait_queue_head_t state_wq;

251

252 struct nvme_subsystem *subsys;

253 struct list_head subsys_entry;

254

255 struct opal_dev *opal_dev;

256

257 char name[12];

258 u16 cntlid;

259

260 u32 ctrl_config;

261 u16 mtfa;

262 u32 queue_count;

263

264 u64 cap;

265 u32 max_hw_sectors;

266 u32 max_segments;

267 u32 max_integrity_segments;

268 #ifdef CONFIG_BLK_DEV_ZONED

269 u32 max_zone_append;

270 #endif

271 u16 crdt[3];

272 u16 oncs;

273 u16 oacs;

274 u16 nssa;

275 u16 nr_streams;

276 u16 sqsize;

277 u32 max_namespaces;

278 atomic_t abort_limit;

279 u8 vwc;

280 u32 vs;

281 u32 sgls;

282 u16 kas;

283 u8 npss;

284 u8 apsta;

285 u16 wctemp;

286 u16 cctemp;

287 u32 oaes;

288 u32 aen_result;

289 u32 ctratt;

290 unsigned int shutdown_timeout;

291 unsigned int kato;

292 bool subsystem;

293 unsigned long quirks;

294 struct nvme_id_power_state psd[32];

295 struct nvme_effects_log *effects;

296 struct list_head cels;

297 struct work_struct scan_work;

298 struct work_struct async_event_work;

299 struct delayed_work ka_work;

300 struct nvme_command ka_cmd;

301 struct work_struct fw_act_work;

302 unsigned long events;

303 bool created;

304

305 #ifdef CONFIG_NVME_MULTIPATH

306 /* asymmetric namespace access: */

307 u8 anacap;

308 u8 anatt;

309 u32 anagrpmax;

310 u32 nanagrpid;

311 struct mutex ana_lock;

312 struct nvme_ana_rsp_hdr *ana_log_buf;

313 size_t ana_log_size;

314 struct timer_list anatt_timer;

315 struct work_struct ana_work;

316 #endif

317

318 /* Power saving configuration */

319 u64 ps_max_latency_us;

320 bool apst_enabled;

321

322 /* PCIe only: */

323 u32 hmpre;

324 u32 hmmin;

325 u32 hmminds;

326 u16 hmmaxd;

327

328 /* Fabrics only */

329 u32 ioccsz;

330 u32 iorcsz;

331 u16 icdoff;

332 u16 maxcmd;

333 int nr_reconnects;

334 struct nvmf_ctrl_options *opts;

335

336 struct page *discard_page;

337 unsigned long discard_page_busy;

338

339 struct nvme_fault_inject fault_inject;

340 };

341

342 enum nvme_iopolicy {

343 NVME_IOPOLICY_NUMA,

344 NVME_IOPOLICY_RR,

345 };

346

347 struct nvme_subsystem {

348 int instance;

349 struct device dev;

350 /*

351 * Because we unregister the device on the last put we need

352 * a separate refcount.

353 */

354 struct kref ref;

355 struct list_head entry;

356 struct mutex lock;

357 struct list_head ctrls;

358 struct list_head nsheads;

359 char subnqn[NVMF_NQN_SIZE];

360 char serial[20];

361 char model[40];

362 char firmware_rev[8];

363 u8 cmic;

364 u16 vendor_id;

365 u16 awupf; /* 0's based awupf value. */

366 struct ida ns_ida;

367 #ifdef CONFIG_NVME_MULTIPATH

368 enum nvme_iopolicy iopolicy;

369 #endif

370 };

371

372 /*

373 * Container structure for uniqueue namespace identifiers.

374 */

375 struct nvme_ns_ids {

376 u8 eui64[8];

377 u8 nguid[16];

378 uuid_t uuid;

379 u8 csi;

380 };

381

382 /*

383 * Anchor structure for namespaces. There is one for each namespace in a

384 * NVMe subsystem that any of our controllers can see, and the namespace

385 * structure for each controller is chained of it. For private namespaces

386 * there is a 1:1 relation to our namespace structures, that is ->list

387 * only ever has a single entry for private namespaces.

388 */

389 struct nvme_ns_head {

390 struct list_head list;

391 struct srcu_struct srcu;

392 struct nvme_subsystem *subsys;

393 unsigned ns_id;

394 struct nvme_ns_ids ids;

395 struct list_head entry;

396 struct kref ref;

397 bool shared;

398 int instance;

399 struct nvme_effects_log *effects;

400 #ifdef CONFIG_NVME_MULTIPATH

401 struct gendisk *disk;

402 struct bio_list requeue_list;

403 spinlock_t requeue_lock;

404 struct work_struct requeue_work;

405 struct mutex lock;

406 unsigned long flags;

407 #define NVME_NSHEAD_DISK_LIVE 0

408 struct nvme_ns __rcu *current_path[];

409 #endif

410 };

411

412 enum nvme_ns_features {

413 NVME_NS_EXT_LBAS = 1 << 0, /* support extended LBA format */

414 NVME_NS_METADATA_SUPPORTED = 1 << 1, /* support getting generated md */

415 };

416

417 struct nvme_ns {

418 struct list_head list;

419

420 struct nvme_ctrl *ctrl;

421 struct request_queue *queue;

422 struct gendisk *disk;

423 #ifdef CONFIG_NVME_MULTIPATH

424 enum nvme_ana_state ana_state;

425 u32 ana_grpid;

426 #endif

427 struct list_head siblings;

428 struct nvm_dev *ndev;

429 struct kref kref;

430 struct nvme_ns_head *head;

431

432 int lba_shift;

433 u16 ms;

434 u16 sgs;

435 u32 sws;

436 u8 pi_type;

437 #ifdef CONFIG_BLK_DEV_ZONED

438 u64 zsze;

439 #endif

440 unsigned long features;

441 unsigned long flags;

442 #define NVME_NS_REMOVING 0

443 #define NVME_NS_DEAD 1

444 #define NVME_NS_ANA_PENDING 2

445

446 struct nvme_fault_inject fault_inject;

447

448 };

449

450 /* NVMe ns supports metadata actions by the controller (generate/strip) */

451 static inline bool nvme_ns_has_pi(struct nvme_ns *ns)

452 {

453 return ns->pi_type && ns->ms == sizeof(struct t10_pi_tuple);

454 }

455

456 struct nvme_ctrl_ops {

457 const char *name;

458 struct module *module;

459 unsigned int flags;

460 #define NVME_F_FABRICS (1 << 0)

461 #define NVME_F_METADATA_SUPPORTED (1 << 1)

462 #define NVME_F_PCI_P2PDMA (1 << 2)

463 int (*reg_read32)(struct nvme_ctrl *ctrl, u32 off, u32 *val);

464 int (*reg_write32)(struct nvme_ctrl *ctrl, u32 off, u32 val);

465 int (*reg_read64)(struct nvme_ctrl *ctrl, u32 off, u64 *val);

466 void (*free_ctrl)(struct nvme_ctrl *ctrl);

467 void (*submit_async_event)(struct nvme_ctrl *ctrl);

468 void (*delete_ctrl)(struct nvme_ctrl *ctrl);

469 int (*get_address)(struct nvme_ctrl *ctrl, char *buf, int size);

470 };

471

472 #ifdef CONFIG_FAULT_INJECTION_DEBUG_FS

473 void nvme_fault_inject_init(struct nvme_fault_inject *fault_inj,

474 const char *dev_name);

475 void nvme_fault_inject_fini(struct nvme_fault_inject *fault_inject);

476 void nvme_should_fail(struct request *req);

477 #else

478 static inline void nvme_fault_inject_init(struct nvme_fault_inject *fault_inj,

479 const char *dev_name)

480 {

481 }

482 static inline void nvme_fault_inject_fini(struct nvme_fault_inject *fault_inj)

483 {

484 }

485 static inline void nvme_should_fail(struct request *req) {}

486 #endif

487

488 static inline int nvme_reset_subsystem(struct nvme_ctrl *ctrl)

489 {

490 if (!ctrl->subsystem)

491 return -ENOTTY;

492 return ctrl->ops->reg_write32(ctrl, NVME_REG_NSSR, 0x4E564D65);

493 }

494

495 /*

496 * Convert a 512B sector number to a device logical block number.

497 */

498 static inline u64 nvme_sect_to_lba(struct nvme_ns *ns, sector_t sector)

499 {

500 return sector >> (ns->lba_shift - SECTOR_SHIFT);

501 }

502

503 /*

504 * Convert a device logical block number to a 512B sector number.

505 */

506 static inline sector_t nvme_lba_to_sect(struct nvme_ns *ns, u64 lba)

507 {

508 return lba << (ns->lba_shift - SECTOR_SHIFT);

509 }

510

511 /*

512 * Convert byte length to nvme's 0-based num dwords

513 */

514 static inline u32 nvme_bytes_to_numd(size_t len)

515 {

516 return (len >> 2) - 1;

517 }

518

519 static inline bool nvme_end_request(struct request *req, __le16 status,

520 union nvme_result result)

521 {

522 struct nvme_request *rq = nvme_req(req);

523

524 rq->status = le16_to_cpu(status) >> 1;

525 rq->result = result;

526 /* inject error when permitted by fault injection framework */

527 nvme_should_fail(req);

528 if (unlikely(blk_should_fake_timeout(req->q)))

529 return true;

530 return blk_mq_complete_request_remote(req);

531 }

532

533 static inline void nvme_get_ctrl(struct nvme_ctrl *ctrl)

534 {

535 get_device(ctrl->device);

536 }

537

538 static inline void nvme_put_ctrl(struct nvme_ctrl *ctrl)

539 {

540 put_device(ctrl->device);

541 }

542

543 static inline bool nvme_is_aen_req(u16 qid, __u16 command_id)

544 {

545 return !qid && command_id >= NVME_AQ_BLK_MQ_DEPTH;

546 }

547

548 void nvme_complete_rq(struct request *req);

549 bool nvme_cancel_request(struct request *req, void *data, bool reserved);

550 bool nvme_change_ctrl_state(struct nvme_ctrl *ctrl,

551 enum nvme_ctrl_state new_state);

552 bool nvme_wait_reset(struct nvme_ctrl *ctrl);

553 int nvme_disable_ctrl(struct nvme_ctrl *ctrl);

554 int nvme_enable_ctrl(struct nvme_ctrl *ctrl);

555 int nvme_shutdown_ctrl(struct nvme_ctrl *ctrl);

556 int nvme_init_ctrl(struct nvme_ctrl *ctrl, struct device *dev,

557 const struct nvme_ctrl_ops *ops, unsigned long quirks);

558 void nvme_uninit_ctrl(struct nvme_ctrl *ctrl);

559 void nvme_start_ctrl(struct nvme_ctrl *ctrl);

560 void nvme_stop_ctrl(struct nvme_ctrl *ctrl);

561 int nvme_init_identify(struct nvme_ctrl *ctrl);

562

563 void nvme_remove_namespaces(struct nvme_ctrl *ctrl);

564

565 int nvme_sec_submit(void *data, u16 spsp, u8 secp, void *buffer, size_t len,

566 bool send);

567

568 void nvme_complete_async_event(struct nvme_ctrl *ctrl, __le16 status,

569 volatile union nvme_result *res);

570

571 void nvme_stop_queues(struct nvme_ctrl *ctrl);

572 void nvme_start_queues(struct nvme_ctrl *ctrl);

573 void nvme_kill_queues(struct nvme_ctrl *ctrl);

574 void nvme_sync_queues(struct nvme_ctrl *ctrl);

575 void nvme_unfreeze(struct nvme_ctrl *ctrl);

576 void nvme_wait_freeze(struct nvme_ctrl *ctrl);

577 void nvme_wait_freeze_timeout(struct nvme_ctrl *ctrl, long timeout);

578 void nvme_start_freeze(struct nvme_ctrl *ctrl);

579

580 #define NVME_QID_ANY -1

581 struct request *nvme_alloc_request(struct request_queue *q,

582 struct nvme_command *cmd, blk_mq_req_flags_t flags, int qid);

583 void nvme_cleanup_cmd(struct request *req);

584 blk_status_t nvme_setup_cmd(struct nvme_ns *ns, struct request *req,

585 struct nvme_command *cmd);

586 int nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd,

587 void *buf, unsigned bufflen);

588 int __nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd,

589 union nvme_result *result, void *buffer, unsigned bufflen,

590 unsigned timeout, int qid, int at_head,

591 blk_mq_req_flags_t flags, bool poll);

592 int nvme_set_features(struct nvme_ctrl *dev, unsigned int fid,

593 unsigned int dword11, void *buffer, size_t buflen,

594 u32 *result);

595 int nvme_get_features(struct nvme_ctrl *dev, unsigned int fid,

596 unsigned int dword11, void *buffer, size_t buflen,

597 u32 *result);

598 int nvme_set_queue_count(struct nvme_ctrl *ctrl, int *count);

599 void nvme_stop_keep_alive(struct nvme_ctrl *ctrl);

600 int nvme_reset_ctrl(struct nvme_ctrl *ctrl);

601 int nvme_reset_ctrl_sync(struct nvme_ctrl *ctrl);

602 int nvme_try_sched_reset(struct nvme_ctrl *ctrl);

603 int nvme_delete_ctrl(struct nvme_ctrl *ctrl);

604

605 int nvme_get_log(struct nvme_ctrl *ctrl, u32 nsid, u8 log_page, u8 lsp, u8 csi,

606 void *log, size_t size, u64 offset);

607 struct nvme_ns *nvme_get_ns_from_disk(struct gendisk *disk,

608 struct nvme_ns_head **head, int *srcu_idx);

609 void nvme_put_ns_from_disk(struct nvme_ns_head *head, int idx);

610

611 extern const struct attribute_group *nvme_ns_id_attr_groups[];

612 extern const struct block_device_operations nvme_ns_head_ops;

613

614 #ifdef CONFIG_NVME_MULTIPATH

615 static inline bool nvme_ctrl_use_ana(struct nvme_ctrl *ctrl)

616 {

617 return ctrl->ana_log_buf != NULL;

618 }

619

620 void nvme_mpath_unfreeze(struct nvme_subsystem *subsys);

621 void nvme_mpath_wait_freeze(struct nvme_subsystem *subsys);

622 void nvme_mpath_start_freeze(struct nvme_subsystem *subsys);

623 void nvme_set_disk_name(char *disk_name, struct nvme_ns *ns,

624 struct nvme_ctrl *ctrl, int *flags);

625 bool nvme_failover_req(struct request *req);

626 void nvme_kick_requeue_lists(struct nvme_ctrl *ctrl);

627 int nvme_mpath_alloc_disk(struct nvme_ctrl *ctrl,struct nvme_ns_head *head);

628 void nvme_mpath_add_disk(struct nvme_ns *ns, struct nvme_id_ns *id);

629 void nvme_mpath_remove_disk(struct nvme_ns_head *head);

630 int nvme_mpath_init(struct nvme_ctrl *ctrl, struct nvme_id_ctrl *id);

631 void nvme_mpath_uninit(struct nvme_ctrl *ctrl);

632 void nvme_mpath_stop(struct nvme_ctrl *ctrl);

633 bool nvme_mpath_clear_current_path(struct nvme_ns *ns);

634 void nvme_mpath_clear_ctrl_paths(struct nvme_ctrl *ctrl);

635 struct nvme_ns *nvme_find_path(struct nvme_ns_head *head);

636 blk_qc_t nvme_ns_head_submit_bio(struct bio *bio);

637

638 static inline void nvme_mpath_check_last_path(struct nvme_ns *ns)

639 {

640 struct nvme_ns_head *head = ns->head;

641

642 if (head->disk && list_empty(&head->list))

643 kblockd_schedule_work(&head->requeue_work);

644 }

645

646 static inline void nvme_trace_bio_complete(struct request *req,

647 blk_status_t status)

648 {

649 struct nvme_ns *ns = req->q->queuedata;

650

651 if (req->cmd_flags & REQ_NVME_MPATH)

652 trace_block_bio_complete(ns->head->disk->queue, req->bio);

653 }

654

655 extern struct device_attribute dev_attr_ana_grpid;

656 extern struct device_attribute dev_attr_ana_state;

657 extern struct device_attribute subsys_attr_iopolicy;

658

659 #else

660 static inline bool nvme_ctrl_use_ana(struct nvme_ctrl *ctrl)

661 {

662 return false;

663 }

664 /*

665 * Without the multipath code enabled, multiple controller per subsystems are

666 * visible as devices and thus we cannot use the subsystem instance.

667 */

668 static inline void nvme_set_disk_name(char *disk_name, struct nvme_ns *ns,

669 struct nvme_ctrl *ctrl, int *flags)

670 {

671 sprintf(disk_name, "nvme%dn%d", ctrl->instance, ns->head->instance);

672 }

673

674 static inline bool nvme_failover_req(struct request *req)

675 {

676 return false;

677 }

678 static inline void nvme_kick_requeue_lists(struct nvme_ctrl *ctrl)

679 {

680 }

681 static inline int nvme_mpath_alloc_disk(struct nvme_ctrl *ctrl,

682 struct nvme_ns_head *head)

683 {

684 return 0;

685 }

686 static inline void nvme_mpath_add_disk(struct nvme_ns *ns,

687 struct nvme_id_ns *id)

688 {

689 }

690 static inline void nvme_mpath_remove_disk(struct nvme_ns_head *head)

691 {

692 }

693 static inline bool nvme_mpath_clear_current_path(struct nvme_ns *ns)

694 {

695 return false;

696 }

697 static inline void nvme_mpath_clear_ctrl_paths(struct nvme_ctrl *ctrl)

698 {

699 }

700 static inline void nvme_mpath_check_last_path(struct nvme_ns *ns)

701 {

702 }

703 static inline void nvme_trace_bio_complete(struct request *req,

704 blk_status_t status)

705 {

706 }

707 static inline int nvme_mpath_init(struct nvme_ctrl *ctrl,

708 struct nvme_id_ctrl *id)

709 {

710 if (ctrl->subsys->cmic & (1 << 3))

711 dev_warn(ctrl->device,

712 "Please enable CONFIG_NVME_MULTIPATH for full support of multi-port devices.\n");

713 return 0;

714 }

715 static inline void nvme_mpath_uninit(struct nvme_ctrl *ctrl)

716 {

717 }

718 static inline void nvme_mpath_stop(struct nvme_ctrl *ctrl)

719 {

720 }

721 static inline void nvme_mpath_unfreeze(struct nvme_subsystem *subsys)

722 {

723 }

724 static inline void nvme_mpath_wait_freeze(struct nvme_subsystem *subsys)

725 {

726 }

727 static inline void nvme_mpath_start_freeze(struct nvme_subsystem *subsys)

728 {

729 }

730 #endif /* CONFIG_NVME_MULTIPATH */

731

732 #ifdef CONFIG_BLK_DEV_ZONED

733 int nvme_update_zone_info(struct gendisk *disk, struct nvme_ns *ns,

734 unsigned lbaf);

735

736 int nvme_report_zones(struct gendisk *disk, sector_t sector,

737 unsigned int nr_zones, report_zones_cb cb, void *data);

738

739 blk_status_t nvme_setup_zone_mgmt_send(struct nvme_ns *ns, struct request *req,

740 struct nvme_command *cmnd,

741 enum nvme_zone_mgmt_action action);

742 #else

743 #define nvme_report_zones NULL

744

745 static inline blk_status_t nvme_setup_zone_mgmt_send(struct nvme_ns *ns,

746 struct request *req, struct nvme_command *cmnd,

747 enum nvme_zone_mgmt_action action)

748 {

749 return BLK_STS_NOTSUPP;

750 }

751

752 static inline int nvme_update_zone_info(struct gendisk *disk,

753 struct nvme_ns *ns,

754 unsigned lbaf)

755 {

756 dev_warn(ns->ctrl->device,

757 "Please enable CONFIG_BLK_DEV_ZONED to support ZNS devices\n");

758 return -EPROTONOSUPPORT;

759 }

760 #endif

761

762 #ifdef CONFIG_NVM

763 int nvme_nvm_register(struct nvme_ns *ns, char *disk_name, int node);

764 void nvme_nvm_unregister(struct nvme_ns *ns);

765 extern const struct attribute_group nvme_nvm_attr_group;

766 int nvme_nvm_ioctl(struct nvme_ns *ns, unsigned int cmd, unsigned long arg);

767 #else

768 static inline int nvme_nvm_register(struct nvme_ns *ns, char *disk_name,

769 int node)

770 {

771 return 0;

772 }

773

774 static inline void nvme_nvm_unregister(struct nvme_ns *ns) {};

775 static inline int nvme_nvm_ioctl(struct nvme_ns *ns, unsigned int cmd,

776 unsigned long arg)

777 {

778 return -ENOTTY;

779 }

780 #endif /* CONFIG_NVM */

781

782 static inline struct nvme_ns *nvme_get_ns_from_dev(struct device *dev)

783 {

784 return dev_to_disk(dev)->private_data;

785 }

786

787 #ifdef CONFIG_NVME_HWMON

788 void nvme_hwmon_init(struct nvme_ctrl *ctrl);

789 #else

790 static inline void nvme_hwmon_init(struct nvme_ctrl *ctrl) { }

791 #endif

792

793 #endif /* _NVME_H */