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 NVME_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 does not properly handle DMA addresses over
152 NVME_QUIRK_DMA_ADDRESS_BITS_48 = (1 << 16),
156 * Common request structure for NVMe passthrough. All drivers must have
157 * this structure as the first member of their request-private data.
159 struct nvme_request {
160 struct nvme_command *cmd;
161 union nvme_result result;
165 struct nvme_ctrl *ctrl;
169 * Mark a bio as coming in through the mpath node.
171 #define REQ_NVME_MPATH REQ_DRV
174 NVME_REQ_CANCELLED = (1 << 0),
175 NVME_REQ_USERCMD = (1 << 1),
178 static inline struct nvme_request *nvme_req(struct request *req)
180 return blk_mq_rq_to_pdu(req);
183 static inline u16 nvme_req_qid(struct request *req)
185 if (!req->q->queuedata)
188 return req->mq_hctx->queue_num + 1;
191 /* The below value is the specific amount of delay needed before checking
192 * readiness in case of the PCI_DEVICE(0x1c58, 0x0003), which needs the
193 * NVME_QUIRK_DELAY_BEFORE_CHK_RDY quirk enabled. The value (in ms) was
196 #define NVME_QUIRK_DELAY_AMOUNT 2300
199 * enum nvme_ctrl_state: Controller state
201 * @NVME_CTRL_NEW: New controller just allocated, initial state
202 * @NVME_CTRL_LIVE: Controller is connected and I/O capable
203 * @NVME_CTRL_RESETTING: Controller is resetting (or scheduled reset)
204 * @NVME_CTRL_CONNECTING: Controller is disconnected, now connecting the
206 * @NVME_CTRL_DELETING: Controller is deleting (or scheduled deletion)
207 * @NVME_CTRL_DELETING_NOIO: Controller is deleting and I/O is not
208 * disabled/failed immediately. This state comes
209 * after all async event processing took place and
210 * before ns removal and the controller deletion
212 * @NVME_CTRL_DEAD: Controller is non-present/unresponsive during
213 * shutdown or removal. In this case we forcibly
214 * kill all inflight I/O as they have no chance to
217 enum nvme_ctrl_state {
221 NVME_CTRL_CONNECTING,
223 NVME_CTRL_DELETING_NOIO,
227 struct nvme_fault_inject {
228 #ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
229 struct fault_attr attr;
230 struct dentry *parent;
231 bool dont_retry; /* DNR, do not retry */
232 u16 status; /* status code */
238 enum nvme_ctrl_state state;
241 struct mutex scan_lock;
242 const struct nvme_ctrl_ops *ops;
243 struct request_queue *admin_q;
244 struct request_queue *connect_q;
245 struct request_queue *fabrics_q;
249 struct blk_mq_tag_set *tagset;
250 struct blk_mq_tag_set *admin_tagset;
251 struct list_head namespaces;
252 struct rw_semaphore namespaces_rwsem;
253 struct device ctrl_device;
254 struct device *device; /* char device */
255 #ifdef CONFIG_NVME_HWMON
256 struct device *hwmon_device;
259 struct work_struct reset_work;
260 struct work_struct delete_work;
261 wait_queue_head_t state_wq;
263 struct nvme_subsystem *subsys;
264 struct list_head subsys_entry;
266 struct opal_dev *opal_dev;
278 u32 max_integrity_segments;
279 u32 max_discard_sectors;
280 u32 max_discard_segments;
281 u32 max_zeroes_sectors;
282 #ifdef CONFIG_BLK_DEV_ZONED
292 atomic_t abort_limit;
304 unsigned int shutdown_timeout;
307 unsigned long quirks;
308 struct nvme_id_power_state psd[32];
309 struct nvme_effects_log *effects;
311 struct work_struct scan_work;
312 struct work_struct async_event_work;
313 struct delayed_work ka_work;
314 struct delayed_work failfast_work;
315 struct nvme_command ka_cmd;
316 struct work_struct fw_act_work;
317 unsigned long events;
319 #ifdef CONFIG_NVME_MULTIPATH
320 /* asymmetric namespace access: */
325 struct mutex ana_lock;
326 struct nvme_ana_rsp_hdr *ana_log_buf;
328 struct timer_list anatt_timer;
329 struct work_struct ana_work;
332 /* Power saving configuration */
333 u64 ps_max_latency_us;
349 #define NVME_CTRL_FAILFAST_EXPIRED 0
350 struct nvmf_ctrl_options *opts;
352 struct page *discard_page;
353 unsigned long discard_page_busy;
355 struct nvme_fault_inject fault_inject;
363 struct nvme_subsystem {
367 * Because we unregister the device on the last put we need
368 * a separate refcount.
371 struct list_head entry;
373 struct list_head ctrls;
374 struct list_head nsheads;
375 char subnqn[NVMF_NQN_SIZE];
378 char firmware_rev[8];
381 u16 awupf; /* 0's based awupf value. */
383 #ifdef CONFIG_NVME_MULTIPATH
384 enum nvme_iopolicy iopolicy;
389 * Container structure for uniqueue namespace identifiers.
399 * Anchor structure for namespaces. There is one for each namespace in a
400 * NVMe subsystem that any of our controllers can see, and the namespace
401 * structure for each controller is chained of it. For private namespaces
402 * there is a 1:1 relation to our namespace structures, that is ->list
403 * only ever has a single entry for private namespaces.
405 struct nvme_ns_head {
406 struct list_head list;
407 struct srcu_struct srcu;
408 struct nvme_subsystem *subsys;
410 struct nvme_ns_ids ids;
411 struct list_head entry;
415 struct nvme_effects_log *effects;
416 struct gendisk *disk;
417 #ifdef CONFIG_NVME_MULTIPATH
418 struct bio_list requeue_list;
419 spinlock_t requeue_lock;
420 struct work_struct requeue_work;
423 #define NVME_NSHEAD_DISK_LIVE 0
424 struct nvme_ns __rcu *current_path[];
428 static inline bool nvme_ns_head_multipath(struct nvme_ns_head *head)
430 return IS_ENABLED(CONFIG_NVME_MULTIPATH) && head->disk;
433 enum nvme_ns_features {
434 NVME_NS_EXT_LBAS = 1 << 0, /* support extended LBA format */
435 NVME_NS_METADATA_SUPPORTED = 1 << 1, /* support getting generated md */
439 struct list_head list;
441 struct nvme_ctrl *ctrl;
442 struct request_queue *queue;
443 struct gendisk *disk;
444 #ifdef CONFIG_NVME_MULTIPATH
445 enum nvme_ana_state ana_state;
448 struct list_head siblings;
449 struct nvm_dev *ndev;
451 struct nvme_ns_head *head;
458 #ifdef CONFIG_BLK_DEV_ZONED
461 unsigned long features;
463 #define NVME_NS_REMOVING 0
464 #define NVME_NS_DEAD 1
465 #define NVME_NS_ANA_PENDING 2
466 #define NVME_NS_FORCE_RO 3
468 struct nvme_fault_inject fault_inject;
472 /* NVMe ns supports metadata actions by the controller (generate/strip) */
473 static inline bool nvme_ns_has_pi(struct nvme_ns *ns)
475 return ns->pi_type && ns->ms == sizeof(struct t10_pi_tuple);
478 struct nvme_ctrl_ops {
480 struct module *module;
482 #define NVME_F_FABRICS (1 << 0)
483 #define NVME_F_METADATA_SUPPORTED (1 << 1)
484 #define NVME_F_PCI_P2PDMA (1 << 2)
485 int (*reg_read32)(struct nvme_ctrl *ctrl, u32 off, u32 *val);
486 int (*reg_write32)(struct nvme_ctrl *ctrl, u32 off, u32 val);
487 int (*reg_read64)(struct nvme_ctrl *ctrl, u32 off, u64 *val);
488 void (*free_ctrl)(struct nvme_ctrl *ctrl);
489 void (*submit_async_event)(struct nvme_ctrl *ctrl);
490 void (*delete_ctrl)(struct nvme_ctrl *ctrl);
491 int (*get_address)(struct nvme_ctrl *ctrl, char *buf, int size);
494 #ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
495 void nvme_fault_inject_init(struct nvme_fault_inject *fault_inj,
496 const char *dev_name);
497 void nvme_fault_inject_fini(struct nvme_fault_inject *fault_inject);
498 void nvme_should_fail(struct request *req);
500 static inline void nvme_fault_inject_init(struct nvme_fault_inject *fault_inj,
501 const char *dev_name)
504 static inline void nvme_fault_inject_fini(struct nvme_fault_inject *fault_inj)
507 static inline void nvme_should_fail(struct request *req) {}
510 static inline int nvme_reset_subsystem(struct nvme_ctrl *ctrl)
512 if (!ctrl->subsystem)
514 return ctrl->ops->reg_write32(ctrl, NVME_REG_NSSR, 0x4E564D65);
518 * Convert a 512B sector number to a device logical block number.
520 static inline u64 nvme_sect_to_lba(struct nvme_ns *ns, sector_t sector)
522 return sector >> (ns->lba_shift - SECTOR_SHIFT);
526 * Convert a device logical block number to a 512B sector number.
528 static inline sector_t nvme_lba_to_sect(struct nvme_ns *ns, u64 lba)
530 return lba << (ns->lba_shift - SECTOR_SHIFT);
534 * Convert byte length to nvme's 0-based num dwords
536 static inline u32 nvme_bytes_to_numd(size_t len)
538 return (len >> 2) - 1;
541 static inline bool nvme_is_ana_error(u16 status)
543 switch (status & 0x7ff) {
544 case NVME_SC_ANA_TRANSITION:
545 case NVME_SC_ANA_INACCESSIBLE:
546 case NVME_SC_ANA_PERSISTENT_LOSS:
553 static inline bool nvme_is_path_error(u16 status)
555 /* check for a status code type of 'path related status' */
556 return (status & 0x700) == 0x300;
560 * Fill in the status and result information from the CQE, and then figure out
561 * if blk-mq will need to use IPI magic to complete the request, and if yes do
562 * so. If not let the caller complete the request without an indirect function
565 static inline bool nvme_try_complete_req(struct request *req, __le16 status,
566 union nvme_result result)
568 struct nvme_request *rq = nvme_req(req);
570 rq->status = le16_to_cpu(status) >> 1;
572 /* inject error when permitted by fault injection framework */
573 nvme_should_fail(req);
574 if (unlikely(blk_should_fake_timeout(req->q)))
576 return blk_mq_complete_request_remote(req);
579 static inline void nvme_get_ctrl(struct nvme_ctrl *ctrl)
581 get_device(ctrl->device);
584 static inline void nvme_put_ctrl(struct nvme_ctrl *ctrl)
586 put_device(ctrl->device);
589 static inline bool nvme_is_aen_req(u16 qid, __u16 command_id)
591 return !qid && command_id >= NVME_AQ_BLK_MQ_DEPTH;
594 void nvme_complete_rq(struct request *req);
595 blk_status_t nvme_host_path_error(struct request *req);
596 bool nvme_cancel_request(struct request *req, void *data, bool reserved);
597 void nvme_cancel_tagset(struct nvme_ctrl *ctrl);
598 void nvme_cancel_admin_tagset(struct nvme_ctrl *ctrl);
599 bool nvme_change_ctrl_state(struct nvme_ctrl *ctrl,
600 enum nvme_ctrl_state new_state);
601 bool nvme_wait_reset(struct nvme_ctrl *ctrl);
602 int nvme_disable_ctrl(struct nvme_ctrl *ctrl);
603 int nvme_enable_ctrl(struct nvme_ctrl *ctrl);
604 int nvme_shutdown_ctrl(struct nvme_ctrl *ctrl);
605 int nvme_init_ctrl(struct nvme_ctrl *ctrl, struct device *dev,
606 const struct nvme_ctrl_ops *ops, unsigned long quirks);
607 void nvme_uninit_ctrl(struct nvme_ctrl *ctrl);
608 void nvme_start_ctrl(struct nvme_ctrl *ctrl);
609 void nvme_stop_ctrl(struct nvme_ctrl *ctrl);
610 int nvme_init_ctrl_finish(struct nvme_ctrl *ctrl);
612 void nvme_remove_namespaces(struct nvme_ctrl *ctrl);
614 int nvme_sec_submit(void *data, u16 spsp, u8 secp, void *buffer, size_t len,
617 void nvme_complete_async_event(struct nvme_ctrl *ctrl, __le16 status,
618 volatile union nvme_result *res);
620 void nvme_stop_queues(struct nvme_ctrl *ctrl);
621 void nvme_start_queues(struct nvme_ctrl *ctrl);
622 void nvme_kill_queues(struct nvme_ctrl *ctrl);
623 void nvme_sync_queues(struct nvme_ctrl *ctrl);
624 void nvme_sync_io_queues(struct nvme_ctrl *ctrl);
625 void nvme_unfreeze(struct nvme_ctrl *ctrl);
626 void nvme_wait_freeze(struct nvme_ctrl *ctrl);
627 int nvme_wait_freeze_timeout(struct nvme_ctrl *ctrl, long timeout);
628 void nvme_start_freeze(struct nvme_ctrl *ctrl);
630 #define NVME_QID_ANY -1
631 struct request *nvme_alloc_request(struct request_queue *q,
632 struct nvme_command *cmd, blk_mq_req_flags_t flags);
633 void nvme_cleanup_cmd(struct request *req);
634 blk_status_t nvme_setup_cmd(struct nvme_ns *ns, struct request *req);
635 int nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd,
636 void *buf, unsigned bufflen);
637 int __nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd,
638 union nvme_result *result, void *buffer, unsigned bufflen,
639 unsigned timeout, int qid, int at_head,
640 blk_mq_req_flags_t flags, bool poll);
641 int nvme_set_features(struct nvme_ctrl *dev, unsigned int fid,
642 unsigned int dword11, void *buffer, size_t buflen,
644 int nvme_get_features(struct nvme_ctrl *dev, unsigned int fid,
645 unsigned int dword11, void *buffer, size_t buflen,
647 int nvme_set_queue_count(struct nvme_ctrl *ctrl, int *count);
648 void nvme_stop_keep_alive(struct nvme_ctrl *ctrl);
649 int nvme_reset_ctrl(struct nvme_ctrl *ctrl);
650 int nvme_try_sched_reset(struct nvme_ctrl *ctrl);
651 int nvme_delete_ctrl(struct nvme_ctrl *ctrl);
653 int nvme_get_log(struct nvme_ctrl *ctrl, u32 nsid, u8 log_page, u8 lsp, u8 csi,
654 void *log, size_t size, u64 offset);
655 struct nvme_ns *nvme_get_ns_from_disk(struct gendisk *disk,
656 struct nvme_ns_head **head, int *srcu_idx);
657 void nvme_put_ns_from_disk(struct nvme_ns_head *head, int idx);
659 extern const struct attribute_group *nvme_ns_id_attr_groups[];
660 extern const struct block_device_operations nvme_ns_head_ops;
662 #ifdef CONFIG_NVME_MULTIPATH
663 static inline bool nvme_ctrl_use_ana(struct nvme_ctrl *ctrl)
665 return ctrl->ana_log_buf != NULL;
668 void nvme_mpath_unfreeze(struct nvme_subsystem *subsys);
669 void nvme_mpath_wait_freeze(struct nvme_subsystem *subsys);
670 void nvme_mpath_start_freeze(struct nvme_subsystem *subsys);
671 bool nvme_mpath_set_disk_name(struct nvme_ns *ns, char *disk_name, int *flags);
672 void nvme_failover_req(struct request *req);
673 void nvme_kick_requeue_lists(struct nvme_ctrl *ctrl);
674 int nvme_mpath_alloc_disk(struct nvme_ctrl *ctrl,struct nvme_ns_head *head);
675 void nvme_mpath_add_disk(struct nvme_ns *ns, struct nvme_id_ns *id);
676 void nvme_mpath_remove_disk(struct nvme_ns_head *head);
677 int nvme_mpath_init(struct nvme_ctrl *ctrl, struct nvme_id_ctrl *id);
678 void nvme_mpath_uninit(struct nvme_ctrl *ctrl);
679 void nvme_mpath_stop(struct nvme_ctrl *ctrl);
680 bool nvme_mpath_clear_current_path(struct nvme_ns *ns);
681 void nvme_mpath_clear_ctrl_paths(struct nvme_ctrl *ctrl);
682 struct nvme_ns *nvme_find_path(struct nvme_ns_head *head);
683 blk_qc_t nvme_ns_head_submit_bio(struct bio *bio);
685 static inline void nvme_mpath_check_last_path(struct nvme_ns *ns)
687 struct nvme_ns_head *head = ns->head;
689 if (head->disk && list_empty(&head->list))
690 kblockd_schedule_work(&head->requeue_work);
693 static inline void nvme_trace_bio_complete(struct request *req)
695 struct nvme_ns *ns = req->q->queuedata;
697 if (req->cmd_flags & REQ_NVME_MPATH)
698 trace_block_bio_complete(ns->head->disk->queue, req->bio);
701 extern struct device_attribute dev_attr_ana_grpid;
702 extern struct device_attribute dev_attr_ana_state;
703 extern struct device_attribute subsys_attr_iopolicy;
706 static inline bool nvme_ctrl_use_ana(struct nvme_ctrl *ctrl)
710 static inline bool nvme_mpath_set_disk_name(struct nvme_ns *ns, char *disk_name,
715 static inline void nvme_failover_req(struct request *req)
718 static inline void nvme_kick_requeue_lists(struct nvme_ctrl *ctrl)
721 static inline int nvme_mpath_alloc_disk(struct nvme_ctrl *ctrl,
722 struct nvme_ns_head *head)
726 static inline void nvme_mpath_add_disk(struct nvme_ns *ns,
727 struct nvme_id_ns *id)
730 static inline void nvme_mpath_remove_disk(struct nvme_ns_head *head)
733 static inline bool nvme_mpath_clear_current_path(struct nvme_ns *ns)
737 static inline void nvme_mpath_clear_ctrl_paths(struct nvme_ctrl *ctrl)
740 static inline void nvme_mpath_check_last_path(struct nvme_ns *ns)
743 static inline void nvme_trace_bio_complete(struct request *req)
746 static inline int nvme_mpath_init(struct nvme_ctrl *ctrl,
747 struct nvme_id_ctrl *id)
749 if (ctrl->subsys->cmic & NVME_CTRL_CMIC_ANA)
750 dev_warn(ctrl->device,
751 "Please enable CONFIG_NVME_MULTIPATH for full support of multi-port devices.\n");
754 static inline void nvme_mpath_uninit(struct nvme_ctrl *ctrl)
757 static inline void nvme_mpath_stop(struct nvme_ctrl *ctrl)
760 static inline void nvme_mpath_unfreeze(struct nvme_subsystem *subsys)
763 static inline void nvme_mpath_wait_freeze(struct nvme_subsystem *subsys)
766 static inline void nvme_mpath_start_freeze(struct nvme_subsystem *subsys)
769 #endif /* CONFIG_NVME_MULTIPATH */
771 int nvme_revalidate_zones(struct nvme_ns *ns);
772 #ifdef CONFIG_BLK_DEV_ZONED
773 int nvme_update_zone_info(struct nvme_ns *ns, unsigned lbaf);
774 int nvme_report_zones(struct gendisk *disk, sector_t sector,
775 unsigned int nr_zones, report_zones_cb cb, void *data);
777 blk_status_t nvme_setup_zone_mgmt_send(struct nvme_ns *ns, struct request *req,
778 struct nvme_command *cmnd,
779 enum nvme_zone_mgmt_action action);
781 #define nvme_report_zones NULL
783 static inline blk_status_t nvme_setup_zone_mgmt_send(struct nvme_ns *ns,
784 struct request *req, struct nvme_command *cmnd,
785 enum nvme_zone_mgmt_action action)
787 return BLK_STS_NOTSUPP;
790 static inline int nvme_update_zone_info(struct nvme_ns *ns, unsigned lbaf)
792 dev_warn(ns->ctrl->device,
793 "Please enable CONFIG_BLK_DEV_ZONED to support ZNS devices\n");
794 return -EPROTONOSUPPORT;
799 int nvme_nvm_register(struct nvme_ns *ns, char *disk_name, int node);
800 void nvme_nvm_unregister(struct nvme_ns *ns);
801 extern const struct attribute_group nvme_nvm_attr_group;
802 int nvme_nvm_ioctl(struct nvme_ns *ns, unsigned int cmd, unsigned long arg);
804 static inline int nvme_nvm_register(struct nvme_ns *ns, char *disk_name,
810 static inline void nvme_nvm_unregister(struct nvme_ns *ns) {};
811 static inline int nvme_nvm_ioctl(struct nvme_ns *ns, unsigned int cmd,
816 #endif /* CONFIG_NVM */
818 static inline struct nvme_ns *nvme_get_ns_from_dev(struct device *dev)
820 return dev_to_disk(dev)->private_data;
823 #ifdef CONFIG_NVME_HWMON
824 int nvme_hwmon_init(struct nvme_ctrl *ctrl);
825 void nvme_hwmon_exit(struct nvme_ctrl *ctrl);
827 static inline int nvme_hwmon_init(struct nvme_ctrl *ctrl)
832 static inline void nvme_hwmon_exit(struct nvme_ctrl *ctrl)
837 u32 nvme_command_effects(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
839 void nvme_execute_passthru_rq(struct request *rq);
840 struct nvme_ctrl *nvme_ctrl_from_file(struct file *file);
841 struct nvme_ns *nvme_find_get_ns(struct nvme_ctrl *ctrl, unsigned nsid);
842 void nvme_put_ns(struct nvme_ns *ns);