1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Copyright (c) 2011-2014, Intel Corporation.
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
36 #define NVME_INLINE_SG_CNT 2
37 #define NVME_INLINE_METADATA_SG_CNT 1
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.
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;
58 * List of workarounds for devices that required behavior not specified in
63 * Prefers I/O aligned to a stripe size specified in a vendor
64 * specific Identify field.
66 NVME_QUIRK_STRIPE_SIZE = (1 << 0),
69 * The controller doesn't handle Identify value others than 0 or 1
72 NVME_QUIRK_IDENTIFY_CNS = (1 << 1),
75 * The controller deterministically returns O's on reads to
76 * logical blocks that deallocate was called on.
78 NVME_QUIRK_DEALLOCATE_ZEROES = (1 << 2),
81 * The controller needs a delay before starts checking the device
82 * readiness, which is done by reading the NVME_CSTS_RDY bit.
84 NVME_QUIRK_DELAY_BEFORE_CHK_RDY = (1 << 3),
87 * APST should not be used.
89 NVME_QUIRK_NO_APST = (1 << 4),
92 * The deepest sleep state should not be used.
94 NVME_QUIRK_NO_DEEPEST_PS = (1 << 5),
97 * Supports the LighNVM command set if indicated in vs[1].
99 NVME_QUIRK_LIGHTNVM = (1 << 6),
102 * Set MEDIUM priority on SQ creation
104 NVME_QUIRK_MEDIUM_PRIO_SQ = (1 << 7),
107 * Ignore device provided subnqn.
109 NVME_QUIRK_IGNORE_DEV_SUBNQN = (1 << 8),
112 * Broken Write Zeroes.
114 NVME_QUIRK_DISABLE_WRITE_ZEROES = (1 << 9),
117 * Force simple suspend/resume path.
119 NVME_QUIRK_SIMPLE_SUSPEND = (1 << 10),
122 * Use only one interrupt vector for all queues
124 NVME_QUIRK_SINGLE_VECTOR = (1 << 11),
127 * Use non-standard 128 bytes SQEs.
129 NVME_QUIRK_128_BYTES_SQES = (1 << 12),
132 * Prevent tag overlap between queues
134 NVME_QUIRK_SHARED_TAGS = (1 << 13),
137 * Don't change the value of the temperature threshold feature
139 NVME_QUIRK_NO_TEMP_THRESH_CHANGE = (1 << 14),
142 * The controller doesn't handle the Identify Namespace
143 * Identification Descriptor list subcommand despite claiming
144 * NVMe 1.3 compliance.
146 NVME_QUIRK_NO_NS_DESC_LIST = (1 << 15),
149 * The controller requires the command_id value be be limited, so skip
150 * encoding the generation sequence number.
152 NVME_QUIRK_SKIP_CID_GEN = (1 << 17),
155 * Reports garbage in the namespace identifiers (eui64, nguid, uuid).
157 NVME_QUIRK_BOGUS_NID = (1 << 18),
161 * Common request structure for NVMe passthrough. All drivers must have
162 * this structure as the first member of their request-private data.
164 struct nvme_request {
165 struct nvme_command *cmd;
166 union nvme_result result;
171 struct nvme_ctrl *ctrl;
175 * Mark a bio as coming in through the mpath node.
177 #define REQ_NVME_MPATH REQ_DRV
180 NVME_REQ_CANCELLED = (1 << 0),
181 NVME_REQ_USERCMD = (1 << 1),
184 static inline struct nvme_request *nvme_req(struct request *req)
186 return blk_mq_rq_to_pdu(req);
189 static inline u16 nvme_req_qid(struct request *req)
191 if (!req->q->queuedata)
193 return blk_mq_unique_tag_to_hwq(blk_mq_unique_tag(req)) + 1;
196 /* The below value is the specific amount of delay needed before checking
197 * readiness in case of the PCI_DEVICE(0x1c58, 0x0003), which needs the
198 * NVME_QUIRK_DELAY_BEFORE_CHK_RDY quirk enabled. The value (in ms) was
201 #define NVME_QUIRK_DELAY_AMOUNT 2300
204 * enum nvme_ctrl_state: Controller state
206 * @NVME_CTRL_NEW: New controller just allocated, initial state
207 * @NVME_CTRL_LIVE: Controller is connected and I/O capable
208 * @NVME_CTRL_RESETTING: Controller is resetting (or scheduled reset)
209 * @NVME_CTRL_CONNECTING: Controller is disconnected, now connecting the
211 * @NVME_CTRL_DELETING: Controller is deleting (or scheduled deletion)
212 * @NVME_CTRL_DELETING_NOIO: Controller is deleting and I/O is not
213 * disabled/failed immediately. This state comes
214 * after all async event processing took place and
215 * before ns removal and the controller deletion
217 * @NVME_CTRL_DEAD: Controller is non-present/unresponsive during
218 * shutdown or removal. In this case we forcibly
219 * kill all inflight I/O as they have no chance to
222 enum nvme_ctrl_state {
226 NVME_CTRL_CONNECTING,
228 NVME_CTRL_DELETING_NOIO,
232 struct nvme_fault_inject {
233 #ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
234 struct fault_attr attr;
235 struct dentry *parent;
236 bool dont_retry; /* DNR, do not retry */
237 u16 status; /* status code */
243 enum nvme_ctrl_state state;
246 struct mutex scan_lock;
247 const struct nvme_ctrl_ops *ops;
248 struct request_queue *admin_q;
249 struct request_queue *connect_q;
250 struct request_queue *fabrics_q;
254 struct blk_mq_tag_set *tagset;
255 struct blk_mq_tag_set *admin_tagset;
256 struct list_head namespaces;
257 struct rw_semaphore namespaces_rwsem;
258 struct device ctrl_device;
259 struct device *device; /* char device */
260 #ifdef CONFIG_NVME_HWMON
261 struct device *hwmon_device;
264 struct work_struct reset_work;
265 struct work_struct delete_work;
266 wait_queue_head_t state_wq;
268 struct nvme_subsystem *subsys;
269 struct list_head subsys_entry;
271 struct opal_dev *opal_dev;
283 u32 max_integrity_segments;
284 #ifdef CONFIG_BLK_DEV_ZONED
294 atomic_t abort_limit;
306 unsigned int shutdown_timeout;
309 unsigned long quirks;
310 struct nvme_id_power_state psd[32];
311 struct nvme_effects_log *effects;
313 struct work_struct scan_work;
314 struct work_struct async_event_work;
315 struct delayed_work ka_work;
316 struct nvme_command ka_cmd;
317 struct work_struct fw_act_work;
318 unsigned long events;
320 #ifdef CONFIG_NVME_MULTIPATH
321 /* asymmetric namespace access: */
326 struct mutex ana_lock;
327 struct nvme_ana_rsp_hdr *ana_log_buf;
329 struct timer_list anatt_timer;
330 struct work_struct ana_work;
333 /* Power saving configuration */
334 u64 ps_max_latency_us;
349 struct nvmf_ctrl_options *opts;
351 struct page *discard_page;
352 unsigned long discard_page_busy;
354 struct nvme_fault_inject fault_inject;
357 static inline enum nvme_ctrl_state nvme_ctrl_state(struct nvme_ctrl *ctrl)
359 return READ_ONCE(ctrl->state);
367 struct nvme_subsystem {
371 * Because we unregister the device on the last put we need
372 * a separate refcount.
375 struct list_head entry;
377 struct list_head ctrls;
378 struct list_head nsheads;
379 char subnqn[NVMF_NQN_SIZE];
382 char firmware_rev[8];
385 u16 awupf; /* 0's based awupf value. */
387 #ifdef CONFIG_NVME_MULTIPATH
388 enum nvme_iopolicy iopolicy;
393 * Container structure for uniqueue namespace identifiers.
403 * Anchor structure for namespaces. There is one for each namespace in a
404 * NVMe subsystem that any of our controllers can see, and the namespace
405 * structure for each controller is chained of it. For private namespaces
406 * there is a 1:1 relation to our namespace structures, that is ->list
407 * only ever has a single entry for private namespaces.
409 struct nvme_ns_head {
410 struct list_head list;
411 struct srcu_struct srcu;
412 struct nvme_subsystem *subsys;
414 struct nvme_ns_ids ids;
415 struct list_head entry;
419 struct nvme_effects_log *effects;
420 #ifdef CONFIG_NVME_MULTIPATH
421 struct gendisk *disk;
422 struct bio_list requeue_list;
423 spinlock_t requeue_lock;
424 struct work_struct requeue_work;
427 #define NVME_NSHEAD_DISK_LIVE 0
428 struct nvme_ns __rcu *current_path[];
432 enum nvme_ns_features {
433 NVME_NS_EXT_LBAS = 1 << 0, /* support extended LBA format */
434 NVME_NS_METADATA_SUPPORTED = 1 << 1, /* support getting generated md */
438 struct list_head list;
440 struct nvme_ctrl *ctrl;
441 struct request_queue *queue;
442 struct gendisk *disk;
443 #ifdef CONFIG_NVME_MULTIPATH
444 enum nvme_ana_state ana_state;
447 struct list_head siblings;
448 struct nvm_dev *ndev;
450 struct nvme_ns_head *head;
457 #ifdef CONFIG_BLK_DEV_ZONED
460 unsigned long features;
462 #define NVME_NS_REMOVING 0
463 #define NVME_NS_DEAD 1
464 #define NVME_NS_ANA_PENDING 2
466 struct nvme_fault_inject fault_inject;
470 /* NVMe ns supports metadata actions by the controller (generate/strip) */
471 static inline bool nvme_ns_has_pi(struct nvme_ns *ns)
473 return ns->pi_type && ns->ms == sizeof(struct t10_pi_tuple);
476 struct nvme_ctrl_ops {
478 struct module *module;
480 #define NVME_F_FABRICS (1 << 0)
481 #define NVME_F_METADATA_SUPPORTED (1 << 1)
482 #define NVME_F_PCI_P2PDMA (1 << 2)
483 int (*reg_read32)(struct nvme_ctrl *ctrl, u32 off, u32 *val);
484 int (*reg_write32)(struct nvme_ctrl *ctrl, u32 off, u32 val);
485 int (*reg_read64)(struct nvme_ctrl *ctrl, u32 off, u64 *val);
486 void (*free_ctrl)(struct nvme_ctrl *ctrl);
487 void (*submit_async_event)(struct nvme_ctrl *ctrl);
488 void (*delete_ctrl)(struct nvme_ctrl *ctrl);
489 void (*stop_ctrl)(struct nvme_ctrl *ctrl);
490 int (*get_address)(struct nvme_ctrl *ctrl, char *buf, int size);
494 * nvme command_id is constructed as such:
495 * | xxxx | xxxxxxxxxxxx |
498 #define nvme_genctr_mask(gen) (gen & 0xf)
499 #define nvme_cid_install_genctr(gen) (nvme_genctr_mask(gen) << 12)
500 #define nvme_genctr_from_cid(cid) ((cid & 0xf000) >> 12)
501 #define nvme_tag_from_cid(cid) (cid & 0xfff)
503 static inline u16 nvme_cid(struct request *rq)
505 return nvme_cid_install_genctr(nvme_req(rq)->genctr) | rq->tag;
508 static inline struct request *nvme_find_rq(struct blk_mq_tags *tags,
511 u8 genctr = nvme_genctr_from_cid(command_id);
512 u16 tag = nvme_tag_from_cid(command_id);
515 rq = blk_mq_tag_to_rq(tags, tag);
517 pr_err("could not locate request for tag %#x\n",
521 if (unlikely(nvme_genctr_mask(nvme_req(rq)->genctr) != genctr)) {
522 dev_err(nvme_req(rq)->ctrl->device,
523 "request %#x genctr mismatch (got %#x expected %#x)\n",
524 tag, genctr, nvme_genctr_mask(nvme_req(rq)->genctr));
530 static inline struct request *nvme_cid_to_rq(struct blk_mq_tags *tags,
533 return blk_mq_tag_to_rq(tags, nvme_tag_from_cid(command_id));
536 #ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
537 void nvme_fault_inject_init(struct nvme_fault_inject *fault_inj,
538 const char *dev_name);
539 void nvme_fault_inject_fini(struct nvme_fault_inject *fault_inject);
540 void nvme_should_fail(struct request *req);
542 static inline void nvme_fault_inject_init(struct nvme_fault_inject *fault_inj,
543 const char *dev_name)
546 static inline void nvme_fault_inject_fini(struct nvme_fault_inject *fault_inj)
549 static inline void nvme_should_fail(struct request *req) {}
552 bool nvme_wait_reset(struct nvme_ctrl *ctrl);
553 int nvme_try_sched_reset(struct nvme_ctrl *ctrl);
555 static inline int nvme_reset_subsystem(struct nvme_ctrl *ctrl)
559 if (!ctrl->subsystem)
561 if (!nvme_wait_reset(ctrl))
564 ret = ctrl->ops->reg_write32(ctrl, NVME_REG_NSSR, 0x4E564D65);
568 return nvme_try_sched_reset(ctrl);
572 * Convert a 512B sector number to a device logical block number.
574 static inline u64 nvme_sect_to_lba(struct nvme_ns *ns, sector_t sector)
576 return sector >> (ns->lba_shift - SECTOR_SHIFT);
580 * Convert a device logical block number to a 512B sector number.
582 static inline sector_t nvme_lba_to_sect(struct nvme_ns *ns, u64 lba)
584 return lba << (ns->lba_shift - SECTOR_SHIFT);
588 * Convert byte length to nvme's 0-based num dwords
590 static inline u32 nvme_bytes_to_numd(size_t len)
592 return (len >> 2) - 1;
595 static inline bool nvme_is_ana_error(u16 status)
597 switch (status & 0x7ff) {
598 case NVME_SC_ANA_TRANSITION:
599 case NVME_SC_ANA_INACCESSIBLE:
600 case NVME_SC_ANA_PERSISTENT_LOSS:
607 static inline bool nvme_is_path_error(u16 status)
609 /* check for a status code type of 'path related status' */
610 return (status & 0x700) == 0x300;
614 * Fill in the status and result information from the CQE, and then figure out
615 * if blk-mq will need to use IPI magic to complete the request, and if yes do
616 * so. If not let the caller complete the request without an indirect function
619 static inline bool nvme_try_complete_req(struct request *req, __le16 status,
620 union nvme_result result)
622 struct nvme_request *rq = nvme_req(req);
624 rq->status = le16_to_cpu(status) >> 1;
626 /* inject error when permitted by fault injection framework */
627 nvme_should_fail(req);
628 if (unlikely(blk_should_fake_timeout(req->q)))
630 return blk_mq_complete_request_remote(req);
633 static inline void nvme_get_ctrl(struct nvme_ctrl *ctrl)
635 get_device(ctrl->device);
638 static inline void nvme_put_ctrl(struct nvme_ctrl *ctrl)
640 put_device(ctrl->device);
643 static inline bool nvme_is_aen_req(u16 qid, __u16 command_id)
646 nvme_tag_from_cid(command_id) >= NVME_AQ_BLK_MQ_DEPTH;
649 void nvme_complete_rq(struct request *req);
650 bool nvme_cancel_request(struct request *req, void *data, bool reserved);
651 void nvme_cancel_tagset(struct nvme_ctrl *ctrl);
652 void nvme_cancel_admin_tagset(struct nvme_ctrl *ctrl);
653 bool nvme_change_ctrl_state(struct nvme_ctrl *ctrl,
654 enum nvme_ctrl_state new_state);
655 int nvme_disable_ctrl(struct nvme_ctrl *ctrl);
656 int nvme_enable_ctrl(struct nvme_ctrl *ctrl);
657 int nvme_shutdown_ctrl(struct nvme_ctrl *ctrl);
658 int nvme_init_ctrl(struct nvme_ctrl *ctrl, struct device *dev,
659 const struct nvme_ctrl_ops *ops, unsigned long quirks);
660 void nvme_uninit_ctrl(struct nvme_ctrl *ctrl);
661 void nvme_start_ctrl(struct nvme_ctrl *ctrl);
662 void nvme_stop_ctrl(struct nvme_ctrl *ctrl);
663 int nvme_init_identify(struct nvme_ctrl *ctrl);
665 void nvme_remove_namespaces(struct nvme_ctrl *ctrl);
667 int nvme_sec_submit(void *data, u16 spsp, u8 secp, void *buffer, size_t len,
670 void nvme_complete_async_event(struct nvme_ctrl *ctrl, __le16 status,
671 volatile union nvme_result *res);
673 void nvme_stop_queues(struct nvme_ctrl *ctrl);
674 void nvme_start_queues(struct nvme_ctrl *ctrl);
675 void nvme_kill_queues(struct nvme_ctrl *ctrl);
676 void nvme_sync_queues(struct nvme_ctrl *ctrl);
677 void nvme_sync_io_queues(struct nvme_ctrl *ctrl);
678 void nvme_unfreeze(struct nvme_ctrl *ctrl);
679 void nvme_wait_freeze(struct nvme_ctrl *ctrl);
680 int nvme_wait_freeze_timeout(struct nvme_ctrl *ctrl, long timeout);
681 void nvme_start_freeze(struct nvme_ctrl *ctrl);
683 #define NVME_QID_ANY -1
684 struct request *nvme_alloc_request(struct request_queue *q,
685 struct nvme_command *cmd, blk_mq_req_flags_t flags);
686 struct request *nvme_alloc_request_qid(struct request_queue *q,
687 struct nvme_command *cmd, blk_mq_req_flags_t flags, int qid);
688 void nvme_cleanup_cmd(struct request *req);
689 blk_status_t nvme_setup_cmd(struct nvme_ns *ns, struct request *req,
690 struct nvme_command *cmd);
691 int nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd,
692 void *buf, unsigned bufflen);
693 int __nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd,
694 union nvme_result *result, void *buffer, unsigned bufflen,
695 unsigned timeout, int qid, int at_head,
696 blk_mq_req_flags_t flags, bool poll);
697 int nvme_set_features(struct nvme_ctrl *dev, unsigned int fid,
698 unsigned int dword11, void *buffer, size_t buflen,
700 int nvme_get_features(struct nvme_ctrl *dev, unsigned int fid,
701 unsigned int dword11, void *buffer, size_t buflen,
703 int nvme_set_queue_count(struct nvme_ctrl *ctrl, int *count);
704 void nvme_stop_keep_alive(struct nvme_ctrl *ctrl);
705 int nvme_reset_ctrl(struct nvme_ctrl *ctrl);
706 int nvme_reset_ctrl_sync(struct nvme_ctrl *ctrl);
707 int nvme_delete_ctrl(struct nvme_ctrl *ctrl);
709 int nvme_get_log(struct nvme_ctrl *ctrl, u32 nsid, u8 log_page, u8 lsp, u8 csi,
710 void *log, size_t size, u64 offset);
711 struct nvme_ns *nvme_get_ns_from_disk(struct gendisk *disk,
712 struct nvme_ns_head **head, int *srcu_idx);
713 void nvme_put_ns_from_disk(struct nvme_ns_head *head, int idx);
715 extern const struct attribute_group *nvme_ns_id_attr_groups[];
716 extern const struct block_device_operations nvme_ns_head_ops;
718 #ifdef CONFIG_NVME_MULTIPATH
719 static inline bool nvme_ctrl_use_ana(struct nvme_ctrl *ctrl)
721 return ctrl->ana_log_buf != NULL;
724 void nvme_mpath_unfreeze(struct nvme_subsystem *subsys);
725 void nvme_mpath_wait_freeze(struct nvme_subsystem *subsys);
726 void nvme_mpath_start_freeze(struct nvme_subsystem *subsys);
727 void nvme_set_disk_name(char *disk_name, struct nvme_ns *ns,
728 struct nvme_ctrl *ctrl, int *flags);
729 void nvme_failover_req(struct request *req);
730 void nvme_kick_requeue_lists(struct nvme_ctrl *ctrl);
731 int nvme_mpath_alloc_disk(struct nvme_ctrl *ctrl,struct nvme_ns_head *head);
732 void nvme_mpath_add_disk(struct nvme_ns *ns, struct nvme_id_ns *id);
733 void nvme_mpath_remove_disk(struct nvme_ns_head *head);
734 int nvme_mpath_init_identify(struct nvme_ctrl *ctrl, struct nvme_id_ctrl *id);
735 void nvme_mpath_init_ctrl(struct nvme_ctrl *ctrl);
736 void nvme_mpath_update(struct nvme_ctrl *ctrl);
737 void nvme_mpath_uninit(struct nvme_ctrl *ctrl);
738 void nvme_mpath_stop(struct nvme_ctrl *ctrl);
739 bool nvme_mpath_clear_current_path(struct nvme_ns *ns);
740 void nvme_mpath_clear_ctrl_paths(struct nvme_ctrl *ctrl);
741 struct nvme_ns *nvme_find_path(struct nvme_ns_head *head);
742 blk_qc_t nvme_ns_head_submit_bio(struct bio *bio);
744 static inline void nvme_mpath_check_last_path(struct nvme_ns *ns)
746 struct nvme_ns_head *head = ns->head;
748 if (head->disk && list_empty(&head->list))
749 kblockd_schedule_work(&head->requeue_work);
752 static inline void nvme_trace_bio_complete(struct request *req,
755 struct nvme_ns *ns = req->q->queuedata;
757 if ((req->cmd_flags & REQ_NVME_MPATH) && req->bio)
758 trace_block_bio_complete(ns->head->disk->queue, req->bio);
761 extern struct device_attribute dev_attr_ana_grpid;
762 extern struct device_attribute dev_attr_ana_state;
763 extern struct device_attribute subsys_attr_iopolicy;
766 static inline bool nvme_ctrl_use_ana(struct nvme_ctrl *ctrl)
771 * Without the multipath code enabled, multiple controller per subsystems are
772 * visible as devices and thus we cannot use the subsystem instance.
774 static inline void nvme_set_disk_name(char *disk_name, struct nvme_ns *ns,
775 struct nvme_ctrl *ctrl, int *flags)
777 sprintf(disk_name, "nvme%dn%d", ctrl->instance, ns->head->instance);
780 static inline void nvme_failover_req(struct request *req)
783 static inline void nvme_kick_requeue_lists(struct nvme_ctrl *ctrl)
786 static inline int nvme_mpath_alloc_disk(struct nvme_ctrl *ctrl,
787 struct nvme_ns_head *head)
791 static inline void nvme_mpath_add_disk(struct nvme_ns *ns,
792 struct nvme_id_ns *id)
795 static inline void nvme_mpath_remove_disk(struct nvme_ns_head *head)
798 static inline bool nvme_mpath_clear_current_path(struct nvme_ns *ns)
802 static inline void nvme_mpath_clear_ctrl_paths(struct nvme_ctrl *ctrl)
805 static inline void nvme_mpath_check_last_path(struct nvme_ns *ns)
808 static inline void nvme_trace_bio_complete(struct request *req,
812 static inline void nvme_mpath_init_ctrl(struct nvme_ctrl *ctrl)
815 static inline int nvme_mpath_init_identify(struct nvme_ctrl *ctrl,
816 struct nvme_id_ctrl *id)
818 if (ctrl->subsys->cmic & (1 << 3))
819 dev_warn(ctrl->device,
820 "Please enable CONFIG_NVME_MULTIPATH for full support of multi-port devices.\n");
823 static inline void nvme_mpath_update(struct nvme_ctrl *ctrl)
826 static inline void nvme_mpath_uninit(struct nvme_ctrl *ctrl)
829 static inline void nvme_mpath_stop(struct nvme_ctrl *ctrl)
832 static inline void nvme_mpath_unfreeze(struct nvme_subsystem *subsys)
835 static inline void nvme_mpath_wait_freeze(struct nvme_subsystem *subsys)
838 static inline void nvme_mpath_start_freeze(struct nvme_subsystem *subsys)
841 #endif /* CONFIG_NVME_MULTIPATH */
843 int nvme_revalidate_zones(struct nvme_ns *ns);
844 #ifdef CONFIG_BLK_DEV_ZONED
845 int nvme_update_zone_info(struct nvme_ns *ns, unsigned lbaf);
846 int nvme_report_zones(struct gendisk *disk, sector_t sector,
847 unsigned int nr_zones, report_zones_cb cb, void *data);
849 blk_status_t nvme_setup_zone_mgmt_send(struct nvme_ns *ns, struct request *req,
850 struct nvme_command *cmnd,
851 enum nvme_zone_mgmt_action action);
853 #define nvme_report_zones NULL
855 static inline blk_status_t nvme_setup_zone_mgmt_send(struct nvme_ns *ns,
856 struct request *req, struct nvme_command *cmnd,
857 enum nvme_zone_mgmt_action action)
859 return BLK_STS_NOTSUPP;
862 static inline int nvme_update_zone_info(struct nvme_ns *ns, unsigned lbaf)
864 dev_warn(ns->ctrl->device,
865 "Please enable CONFIG_BLK_DEV_ZONED to support ZNS devices\n");
866 return -EPROTONOSUPPORT;
871 int nvme_nvm_register(struct nvme_ns *ns, char *disk_name, int node);
872 void nvme_nvm_unregister(struct nvme_ns *ns);
873 extern const struct attribute_group nvme_nvm_attr_group;
874 int nvme_nvm_ioctl(struct nvme_ns *ns, unsigned int cmd, unsigned long arg);
876 static inline int nvme_nvm_register(struct nvme_ns *ns, char *disk_name,
882 static inline void nvme_nvm_unregister(struct nvme_ns *ns) {};
883 static inline int nvme_nvm_ioctl(struct nvme_ns *ns, unsigned int cmd,
888 #endif /* CONFIG_NVM */
890 static inline struct nvme_ns *nvme_get_ns_from_dev(struct device *dev)
892 return dev_to_disk(dev)->private_data;
895 #ifdef CONFIG_NVME_HWMON
896 int nvme_hwmon_init(struct nvme_ctrl *ctrl);
897 void nvme_hwmon_exit(struct nvme_ctrl *ctrl);
899 static inline int nvme_hwmon_init(struct nvme_ctrl *ctrl)
904 static inline void nvme_hwmon_exit(struct nvme_ctrl *ctrl)
909 u32 nvme_command_effects(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
911 void nvme_execute_passthru_rq(struct request *rq);
912 struct nvme_ctrl *nvme_ctrl_from_file(struct file *file);
913 struct nvme_ns *nvme_find_get_ns(struct nvme_ctrl *ctrl, unsigned nsid);
914 void nvme_put_ns(struct nvme_ns *ns);