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),
150 * Common request structure for NVMe passthrough. All drivers must have
151 * this structure as the first member of their request-private data.
153 struct nvme_request {
154 struct nvme_command *cmd;
155 union nvme_result result;
159 struct nvme_ctrl *ctrl;
163 * Mark a bio as coming in through the mpath node.
165 #define REQ_NVME_MPATH REQ_DRV
168 NVME_REQ_CANCELLED = (1 << 0),
169 NVME_REQ_USERCMD = (1 << 1),
172 static inline struct nvme_request *nvme_req(struct request *req)
174 return blk_mq_rq_to_pdu(req);
177 static inline u16 nvme_req_qid(struct request *req)
181 return blk_mq_unique_tag_to_hwq(blk_mq_unique_tag(req)) + 1;
184 /* The below value is the specific amount of delay needed before checking
185 * readiness in case of the PCI_DEVICE(0x1c58, 0x0003), which needs the
186 * NVME_QUIRK_DELAY_BEFORE_CHK_RDY quirk enabled. The value (in ms) was
189 #define NVME_QUIRK_DELAY_AMOUNT 2300
192 * enum nvme_ctrl_state: Controller state
194 * @NVME_CTRL_NEW: New controller just allocated, initial state
195 * @NVME_CTRL_LIVE: Controller is connected and I/O capable
196 * @NVME_CTRL_RESETTING: Controller is resetting (or scheduled reset)
197 * @NVME_CTRL_CONNECTING: Controller is disconnected, now connecting the
199 * @NVME_CTRL_DELETING: Controller is deleting (or scheduled deletion)
200 * @NVME_CTRL_DELETING_NOIO: Controller is deleting and I/O is not
201 * disabled/failed immediately. This state comes
202 * after all async event processing took place and
203 * before ns removal and the controller deletion
205 * @NVME_CTRL_DEAD: Controller is non-present/unresponsive during
206 * shutdown or removal. In this case we forcibly
207 * kill all inflight I/O as they have no chance to
210 enum nvme_ctrl_state {
214 NVME_CTRL_CONNECTING,
216 NVME_CTRL_DELETING_NOIO,
220 struct nvme_fault_inject {
221 #ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
222 struct fault_attr attr;
223 struct dentry *parent;
224 bool dont_retry; /* DNR, do not retry */
225 u16 status; /* status code */
230 struct list_head entry;
231 struct nvme_effects_log log;
237 enum nvme_ctrl_state state;
240 struct mutex scan_lock;
241 const struct nvme_ctrl_ops *ops;
242 struct request_queue *admin_q;
243 struct request_queue *connect_q;
244 struct request_queue *fabrics_q;
248 struct blk_mq_tag_set *tagset;
249 struct blk_mq_tag_set *admin_tagset;
250 struct list_head namespaces;
251 struct rw_semaphore namespaces_rwsem;
252 struct device ctrl_device;
253 struct device *device; /* char device */
255 struct work_struct reset_work;
256 struct work_struct delete_work;
257 wait_queue_head_t state_wq;
259 struct nvme_subsystem *subsys;
260 struct list_head subsys_entry;
262 struct opal_dev *opal_dev;
274 u32 max_integrity_segments;
275 #ifdef CONFIG_BLK_DEV_ZONED
285 atomic_t abort_limit;
297 unsigned int shutdown_timeout;
300 unsigned long quirks;
301 struct nvme_id_power_state psd[32];
302 struct nvme_effects_log *effects;
303 struct list_head cels;
304 struct work_struct scan_work;
305 struct work_struct async_event_work;
306 struct delayed_work ka_work;
307 struct nvme_command ka_cmd;
308 struct work_struct fw_act_work;
309 unsigned long events;
311 #ifdef CONFIG_NVME_MULTIPATH
312 /* asymmetric namespace access: */
317 struct mutex ana_lock;
318 struct nvme_ana_rsp_hdr *ana_log_buf;
320 struct timer_list anatt_timer;
321 struct work_struct ana_work;
324 /* Power saving configuration */
325 u64 ps_max_latency_us;
340 struct nvmf_ctrl_options *opts;
342 struct page *discard_page;
343 unsigned long discard_page_busy;
345 struct nvme_fault_inject fault_inject;
353 struct nvme_subsystem {
357 * Because we unregister the device on the last put we need
358 * a separate refcount.
361 struct list_head entry;
363 struct list_head ctrls;
364 struct list_head nsheads;
365 char subnqn[NVMF_NQN_SIZE];
368 char firmware_rev[8];
371 u16 awupf; /* 0's based awupf value. */
373 #ifdef CONFIG_NVME_MULTIPATH
374 enum nvme_iopolicy iopolicy;
379 * Container structure for uniqueue namespace identifiers.
389 * Anchor structure for namespaces. There is one for each namespace in a
390 * NVMe subsystem that any of our controllers can see, and the namespace
391 * structure for each controller is chained of it. For private namespaces
392 * there is a 1:1 relation to our namespace structures, that is ->list
393 * only ever has a single entry for private namespaces.
395 struct nvme_ns_head {
396 struct list_head list;
397 struct srcu_struct srcu;
398 struct nvme_subsystem *subsys;
400 struct nvme_ns_ids ids;
401 struct list_head entry;
405 struct nvme_effects_log *effects;
406 #ifdef CONFIG_NVME_MULTIPATH
407 struct gendisk *disk;
408 struct bio_list requeue_list;
409 spinlock_t requeue_lock;
410 struct work_struct requeue_work;
413 #define NVME_NSHEAD_DISK_LIVE 0
414 struct nvme_ns __rcu *current_path[];
418 enum nvme_ns_features {
419 NVME_NS_EXT_LBAS = 1 << 0, /* support extended LBA format */
420 NVME_NS_METADATA_SUPPORTED = 1 << 1, /* support getting generated md */
424 struct list_head list;
426 struct nvme_ctrl *ctrl;
427 struct request_queue *queue;
428 struct gendisk *disk;
429 #ifdef CONFIG_NVME_MULTIPATH
430 enum nvme_ana_state ana_state;
433 struct list_head siblings;
434 struct nvm_dev *ndev;
436 struct nvme_ns_head *head;
443 #ifdef CONFIG_BLK_DEV_ZONED
446 unsigned long features;
448 #define NVME_NS_REMOVING 0
449 #define NVME_NS_DEAD 1
450 #define NVME_NS_ANA_PENDING 2
452 struct nvme_fault_inject fault_inject;
456 /* NVMe ns supports metadata actions by the controller (generate/strip) */
457 static inline bool nvme_ns_has_pi(struct nvme_ns *ns)
459 return ns->pi_type && ns->ms == sizeof(struct t10_pi_tuple);
462 struct nvme_ctrl_ops {
464 struct module *module;
466 #define NVME_F_FABRICS (1 << 0)
467 #define NVME_F_METADATA_SUPPORTED (1 << 1)
468 #define NVME_F_PCI_P2PDMA (1 << 2)
469 int (*reg_read32)(struct nvme_ctrl *ctrl, u32 off, u32 *val);
470 int (*reg_write32)(struct nvme_ctrl *ctrl, u32 off, u32 val);
471 int (*reg_read64)(struct nvme_ctrl *ctrl, u32 off, u64 *val);
472 void (*free_ctrl)(struct nvme_ctrl *ctrl);
473 void (*submit_async_event)(struct nvme_ctrl *ctrl);
474 void (*delete_ctrl)(struct nvme_ctrl *ctrl);
475 int (*get_address)(struct nvme_ctrl *ctrl, char *buf, int size);
478 #ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
479 void nvme_fault_inject_init(struct nvme_fault_inject *fault_inj,
480 const char *dev_name);
481 void nvme_fault_inject_fini(struct nvme_fault_inject *fault_inject);
482 void nvme_should_fail(struct request *req);
484 static inline void nvme_fault_inject_init(struct nvme_fault_inject *fault_inj,
485 const char *dev_name)
488 static inline void nvme_fault_inject_fini(struct nvme_fault_inject *fault_inj)
491 static inline void nvme_should_fail(struct request *req) {}
494 static inline int nvme_reset_subsystem(struct nvme_ctrl *ctrl)
496 if (!ctrl->subsystem)
498 return ctrl->ops->reg_write32(ctrl, NVME_REG_NSSR, 0x4E564D65);
502 * Convert a 512B sector number to a device logical block number.
504 static inline u64 nvme_sect_to_lba(struct nvme_ns *ns, sector_t sector)
506 return sector >> (ns->lba_shift - SECTOR_SHIFT);
510 * Convert a device logical block number to a 512B sector number.
512 static inline sector_t nvme_lba_to_sect(struct nvme_ns *ns, u64 lba)
514 return lba << (ns->lba_shift - SECTOR_SHIFT);
518 * Convert byte length to nvme's 0-based num dwords
520 static inline u32 nvme_bytes_to_numd(size_t len)
522 return (len >> 2) - 1;
525 static inline bool nvme_is_ana_error(u16 status)
527 switch (status & 0x7ff) {
528 case NVME_SC_ANA_TRANSITION:
529 case NVME_SC_ANA_INACCESSIBLE:
530 case NVME_SC_ANA_PERSISTENT_LOSS:
537 static inline bool nvme_is_path_error(u16 status)
539 /* check for a status code type of 'path related status' */
540 return (status & 0x700) == 0x300;
544 * Fill in the status and result information from the CQE, and then figure out
545 * if blk-mq will need to use IPI magic to complete the request, and if yes do
546 * so. If not let the caller complete the request without an indirect function
549 static inline bool nvme_try_complete_req(struct request *req, __le16 status,
550 union nvme_result result)
552 struct nvme_request *rq = nvme_req(req);
554 rq->status = le16_to_cpu(status) >> 1;
556 /* inject error when permitted by fault injection framework */
557 nvme_should_fail(req);
558 if (unlikely(blk_should_fake_timeout(req->q)))
560 return blk_mq_complete_request_remote(req);
563 static inline void nvme_get_ctrl(struct nvme_ctrl *ctrl)
565 get_device(ctrl->device);
568 static inline void nvme_put_ctrl(struct nvme_ctrl *ctrl)
570 put_device(ctrl->device);
573 static inline bool nvme_is_aen_req(u16 qid, __u16 command_id)
575 return !qid && command_id >= NVME_AQ_BLK_MQ_DEPTH;
578 void nvme_complete_rq(struct request *req);
579 bool nvme_cancel_request(struct request *req, void *data, bool reserved);
580 bool nvme_change_ctrl_state(struct nvme_ctrl *ctrl,
581 enum nvme_ctrl_state new_state);
582 bool nvme_wait_reset(struct nvme_ctrl *ctrl);
583 int nvme_disable_ctrl(struct nvme_ctrl *ctrl);
584 int nvme_enable_ctrl(struct nvme_ctrl *ctrl);
585 int nvme_shutdown_ctrl(struct nvme_ctrl *ctrl);
586 int nvme_init_ctrl(struct nvme_ctrl *ctrl, struct device *dev,
587 const struct nvme_ctrl_ops *ops, unsigned long quirks);
588 void nvme_uninit_ctrl(struct nvme_ctrl *ctrl);
589 void nvme_start_ctrl(struct nvme_ctrl *ctrl);
590 void nvme_stop_ctrl(struct nvme_ctrl *ctrl);
591 int nvme_init_identify(struct nvme_ctrl *ctrl);
593 void nvme_remove_namespaces(struct nvme_ctrl *ctrl);
595 int nvme_sec_submit(void *data, u16 spsp, u8 secp, void *buffer, size_t len,
598 void nvme_complete_async_event(struct nvme_ctrl *ctrl, __le16 status,
599 volatile union nvme_result *res);
601 void nvme_stop_queues(struct nvme_ctrl *ctrl);
602 void nvme_start_queues(struct nvme_ctrl *ctrl);
603 void nvme_kill_queues(struct nvme_ctrl *ctrl);
604 void nvme_sync_queues(struct nvme_ctrl *ctrl);
605 void nvme_unfreeze(struct nvme_ctrl *ctrl);
606 void nvme_wait_freeze(struct nvme_ctrl *ctrl);
607 int nvme_wait_freeze_timeout(struct nvme_ctrl *ctrl, long timeout);
608 void nvme_start_freeze(struct nvme_ctrl *ctrl);
610 #define NVME_QID_ANY -1
611 struct request *nvme_alloc_request(struct request_queue *q,
612 struct nvme_command *cmd, blk_mq_req_flags_t flags, int qid);
613 void nvme_cleanup_cmd(struct request *req);
614 blk_status_t nvme_setup_cmd(struct nvme_ns *ns, struct request *req,
615 struct nvme_command *cmd);
616 int nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd,
617 void *buf, unsigned bufflen);
618 int __nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd,
619 union nvme_result *result, void *buffer, unsigned bufflen,
620 unsigned timeout, int qid, int at_head,
621 blk_mq_req_flags_t flags, bool poll);
622 int nvme_set_features(struct nvme_ctrl *dev, unsigned int fid,
623 unsigned int dword11, void *buffer, size_t buflen,
625 int nvme_get_features(struct nvme_ctrl *dev, unsigned int fid,
626 unsigned int dword11, void *buffer, size_t buflen,
628 int nvme_set_queue_count(struct nvme_ctrl *ctrl, int *count);
629 void nvme_stop_keep_alive(struct nvme_ctrl *ctrl);
630 int nvme_reset_ctrl(struct nvme_ctrl *ctrl);
631 int nvme_reset_ctrl_sync(struct nvme_ctrl *ctrl);
632 int nvme_try_sched_reset(struct nvme_ctrl *ctrl);
633 int nvme_delete_ctrl(struct nvme_ctrl *ctrl);
635 int nvme_get_log(struct nvme_ctrl *ctrl, u32 nsid, u8 log_page, u8 lsp, u8 csi,
636 void *log, size_t size, u64 offset);
637 struct nvme_ns *nvme_get_ns_from_disk(struct gendisk *disk,
638 struct nvme_ns_head **head, int *srcu_idx);
639 void nvme_put_ns_from_disk(struct nvme_ns_head *head, int idx);
641 extern const struct attribute_group *nvme_ns_id_attr_groups[];
642 extern const struct block_device_operations nvme_ns_head_ops;
644 #ifdef CONFIG_NVME_MULTIPATH
645 static inline bool nvme_ctrl_use_ana(struct nvme_ctrl *ctrl)
647 return ctrl->ana_log_buf != NULL;
650 void nvme_mpath_unfreeze(struct nvme_subsystem *subsys);
651 void nvme_mpath_wait_freeze(struct nvme_subsystem *subsys);
652 void nvme_mpath_start_freeze(struct nvme_subsystem *subsys);
653 void nvme_set_disk_name(char *disk_name, struct nvme_ns *ns,
654 struct nvme_ctrl *ctrl, int *flags);
655 void nvme_failover_req(struct request *req);
656 void nvme_kick_requeue_lists(struct nvme_ctrl *ctrl);
657 int nvme_mpath_alloc_disk(struct nvme_ctrl *ctrl,struct nvme_ns_head *head);
658 void nvme_mpath_add_disk(struct nvme_ns *ns, struct nvme_id_ns *id);
659 void nvme_mpath_remove_disk(struct nvme_ns_head *head);
660 int nvme_mpath_init(struct nvme_ctrl *ctrl, struct nvme_id_ctrl *id);
661 void nvme_mpath_uninit(struct nvme_ctrl *ctrl);
662 void nvme_mpath_stop(struct nvme_ctrl *ctrl);
663 bool nvme_mpath_clear_current_path(struct nvme_ns *ns);
664 void nvme_mpath_clear_ctrl_paths(struct nvme_ctrl *ctrl);
665 struct nvme_ns *nvme_find_path(struct nvme_ns_head *head);
666 blk_qc_t nvme_ns_head_submit_bio(struct bio *bio);
668 static inline void nvme_mpath_check_last_path(struct nvme_ns *ns)
670 struct nvme_ns_head *head = ns->head;
672 if (head->disk && list_empty(&head->list))
673 kblockd_schedule_work(&head->requeue_work);
676 static inline void nvme_trace_bio_complete(struct request *req,
679 struct nvme_ns *ns = req->q->queuedata;
681 if (req->cmd_flags & REQ_NVME_MPATH)
682 trace_block_bio_complete(ns->head->disk->queue, req->bio);
685 static inline void nvme_mpath_update_disk_size(struct gendisk *disk)
687 struct block_device *bdev = bdget_disk(disk, 0);
690 bd_set_size(bdev, get_capacity(disk) << SECTOR_SHIFT);
695 extern struct device_attribute dev_attr_ana_grpid;
696 extern struct device_attribute dev_attr_ana_state;
697 extern struct device_attribute subsys_attr_iopolicy;
700 static inline bool nvme_ctrl_use_ana(struct nvme_ctrl *ctrl)
705 * Without the multipath code enabled, multiple controller per subsystems are
706 * visible as devices and thus we cannot use the subsystem instance.
708 static inline void nvme_set_disk_name(char *disk_name, struct nvme_ns *ns,
709 struct nvme_ctrl *ctrl, int *flags)
711 sprintf(disk_name, "nvme%dn%d", ctrl->instance, ns->head->instance);
714 static inline void nvme_failover_req(struct request *req)
717 static inline void nvme_kick_requeue_lists(struct nvme_ctrl *ctrl)
720 static inline int nvme_mpath_alloc_disk(struct nvme_ctrl *ctrl,
721 struct nvme_ns_head *head)
725 static inline void nvme_mpath_add_disk(struct nvme_ns *ns,
726 struct nvme_id_ns *id)
729 static inline void nvme_mpath_remove_disk(struct nvme_ns_head *head)
732 static inline bool nvme_mpath_clear_current_path(struct nvme_ns *ns)
736 static inline void nvme_mpath_clear_ctrl_paths(struct nvme_ctrl *ctrl)
739 static inline void nvme_mpath_check_last_path(struct nvme_ns *ns)
742 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 & (1 << 3))
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 static inline void nvme_mpath_update_disk_size(struct gendisk *disk)
772 #endif /* CONFIG_NVME_MULTIPATH */
774 #ifdef CONFIG_BLK_DEV_ZONED
775 int nvme_update_zone_info(struct gendisk *disk, struct nvme_ns *ns,
778 int nvme_report_zones(struct gendisk *disk, sector_t sector,
779 unsigned int nr_zones, report_zones_cb cb, void *data);
781 blk_status_t nvme_setup_zone_mgmt_send(struct nvme_ns *ns, struct request *req,
782 struct nvme_command *cmnd,
783 enum nvme_zone_mgmt_action action);
785 #define nvme_report_zones NULL
787 static inline blk_status_t nvme_setup_zone_mgmt_send(struct nvme_ns *ns,
788 struct request *req, struct nvme_command *cmnd,
789 enum nvme_zone_mgmt_action action)
791 return BLK_STS_NOTSUPP;
794 static inline int nvme_update_zone_info(struct gendisk *disk,
798 dev_warn(ns->ctrl->device,
799 "Please enable CONFIG_BLK_DEV_ZONED to support ZNS devices\n");
800 return -EPROTONOSUPPORT;
805 int nvme_nvm_register(struct nvme_ns *ns, char *disk_name, int node);
806 void nvme_nvm_unregister(struct nvme_ns *ns);
807 extern const struct attribute_group nvme_nvm_attr_group;
808 int nvme_nvm_ioctl(struct nvme_ns *ns, unsigned int cmd, unsigned long arg);
810 static inline int nvme_nvm_register(struct nvme_ns *ns, char *disk_name,
816 static inline void nvme_nvm_unregister(struct nvme_ns *ns) {};
817 static inline int nvme_nvm_ioctl(struct nvme_ns *ns, unsigned int cmd,
822 #endif /* CONFIG_NVM */
824 static inline struct nvme_ns *nvme_get_ns_from_dev(struct device *dev)
826 return dev_to_disk(dev)->private_data;
829 #ifdef CONFIG_NVME_HWMON
830 void nvme_hwmon_init(struct nvme_ctrl *ctrl);
832 static inline void nvme_hwmon_init(struct nvme_ctrl *ctrl) { }
835 u32 nvme_command_effects(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
837 void nvme_execute_passthru_rq(struct request *rq);
838 struct nvme_ctrl *nvme_ctrl_get_by_path(const char *path);
839 struct nvme_ns *nvme_find_get_ns(struct nvme_ctrl *ctrl, unsigned nsid);
840 void nvme_put_ns(struct nvme_ns *ns);