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/sed-opal.h>
15 #include <linux/fault-inject.h>
16 #include <linux/rcupdate.h>
17 #include <linux/wait.h>
18 #include <linux/t10-pi.h>
20 #include <trace/events/block.h>
22 extern unsigned int nvme_io_timeout;
23 #define NVME_IO_TIMEOUT (nvme_io_timeout * HZ)
25 extern unsigned int admin_timeout;
26 #define NVME_ADMIN_TIMEOUT (admin_timeout * HZ)
28 #define NVME_DEFAULT_KATO 5
30 #ifdef CONFIG_ARCH_NO_SG_CHAIN
31 #define NVME_INLINE_SG_CNT 0
32 #define NVME_INLINE_METADATA_SG_CNT 0
34 #define NVME_INLINE_SG_CNT 2
35 #define NVME_INLINE_METADATA_SG_CNT 1
39 * Default to a 4K page size, with the intention to update this
40 * path in the future to accommodate architectures with differing
41 * kernel and IO page sizes.
43 #define NVME_CTRL_PAGE_SHIFT 12
44 #define NVME_CTRL_PAGE_SIZE (1 << NVME_CTRL_PAGE_SHIFT)
46 extern struct workqueue_struct *nvme_wq;
47 extern struct workqueue_struct *nvme_reset_wq;
48 extern struct workqueue_struct *nvme_delete_wq;
51 * List of workarounds for devices that required behavior not specified in
56 * Prefers I/O aligned to a stripe size specified in a vendor
57 * specific Identify field.
59 NVME_QUIRK_STRIPE_SIZE = (1 << 0),
62 * The controller doesn't handle Identify value others than 0 or 1
65 NVME_QUIRK_IDENTIFY_CNS = (1 << 1),
68 * The controller deterministically returns O's on reads to
69 * logical blocks that deallocate was called on.
71 NVME_QUIRK_DEALLOCATE_ZEROES = (1 << 2),
74 * The controller needs a delay before starts checking the device
75 * readiness, which is done by reading the NVME_CSTS_RDY bit.
77 NVME_QUIRK_DELAY_BEFORE_CHK_RDY = (1 << 3),
80 * APST should not be used.
82 NVME_QUIRK_NO_APST = (1 << 4),
85 * The deepest sleep state should not be used.
87 NVME_QUIRK_NO_DEEPEST_PS = (1 << 5),
90 * Set MEDIUM priority on SQ creation
92 NVME_QUIRK_MEDIUM_PRIO_SQ = (1 << 7),
95 * Ignore device provided subnqn.
97 NVME_QUIRK_IGNORE_DEV_SUBNQN = (1 << 8),
100 * Broken Write Zeroes.
102 NVME_QUIRK_DISABLE_WRITE_ZEROES = (1 << 9),
105 * Force simple suspend/resume path.
107 NVME_QUIRK_SIMPLE_SUSPEND = (1 << 10),
110 * Use only one interrupt vector for all queues
112 NVME_QUIRK_SINGLE_VECTOR = (1 << 11),
115 * Use non-standard 128 bytes SQEs.
117 NVME_QUIRK_128_BYTES_SQES = (1 << 12),
120 * Prevent tag overlap between queues
122 NVME_QUIRK_SHARED_TAGS = (1 << 13),
125 * Don't change the value of the temperature threshold feature
127 NVME_QUIRK_NO_TEMP_THRESH_CHANGE = (1 << 14),
130 * The controller doesn't handle the Identify Namespace
131 * Identification Descriptor list subcommand despite claiming
132 * NVMe 1.3 compliance.
134 NVME_QUIRK_NO_NS_DESC_LIST = (1 << 15),
137 * The controller does not properly handle DMA addresses over
140 NVME_QUIRK_DMA_ADDRESS_BITS_48 = (1 << 16),
143 * The controller requires the command_id value be be limited, so skip
144 * encoding the generation sequence number.
146 NVME_QUIRK_SKIP_CID_GEN = (1 << 17),
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;
160 struct nvme_ctrl *ctrl;
164 * Mark a bio as coming in through the mpath node.
166 #define REQ_NVME_MPATH REQ_DRV
169 NVME_REQ_CANCELLED = (1 << 0),
170 NVME_REQ_USERCMD = (1 << 1),
173 static inline struct nvme_request *nvme_req(struct request *req)
175 return blk_mq_rq_to_pdu(req);
178 static inline u16 nvme_req_qid(struct request *req)
180 if (!req->q->queuedata)
183 return req->mq_hctx->queue_num + 1;
186 /* The below value is the specific amount of delay needed before checking
187 * readiness in case of the PCI_DEVICE(0x1c58, 0x0003), which needs the
188 * NVME_QUIRK_DELAY_BEFORE_CHK_RDY quirk enabled. The value (in ms) was
191 #define NVME_QUIRK_DELAY_AMOUNT 2300
194 * enum nvme_ctrl_state: Controller state
196 * @NVME_CTRL_NEW: New controller just allocated, initial state
197 * @NVME_CTRL_LIVE: Controller is connected and I/O capable
198 * @NVME_CTRL_RESETTING: Controller is resetting (or scheduled reset)
199 * @NVME_CTRL_CONNECTING: Controller is disconnected, now connecting the
201 * @NVME_CTRL_DELETING: Controller is deleting (or scheduled deletion)
202 * @NVME_CTRL_DELETING_NOIO: Controller is deleting and I/O is not
203 * disabled/failed immediately. This state comes
204 * after all async event processing took place and
205 * before ns removal and the controller deletion
207 * @NVME_CTRL_DEAD: Controller is non-present/unresponsive during
208 * shutdown or removal. In this case we forcibly
209 * kill all inflight I/O as they have no chance to
212 enum nvme_ctrl_state {
216 NVME_CTRL_CONNECTING,
218 NVME_CTRL_DELETING_NOIO,
222 struct nvme_fault_inject {
223 #ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
224 struct fault_attr attr;
225 struct dentry *parent;
226 bool dont_retry; /* DNR, do not retry */
227 u16 status; /* status code */
233 enum nvme_ctrl_state state;
236 struct mutex scan_lock;
237 const struct nvme_ctrl_ops *ops;
238 struct request_queue *admin_q;
239 struct request_queue *connect_q;
240 struct request_queue *fabrics_q;
244 struct blk_mq_tag_set *tagset;
245 struct blk_mq_tag_set *admin_tagset;
246 struct list_head namespaces;
247 struct rw_semaphore namespaces_rwsem;
248 struct device ctrl_device;
249 struct device *device; /* char device */
250 #ifdef CONFIG_NVME_HWMON
251 struct device *hwmon_device;
254 struct work_struct reset_work;
255 struct work_struct delete_work;
256 wait_queue_head_t state_wq;
258 struct nvme_subsystem *subsys;
259 struct list_head subsys_entry;
261 struct opal_dev *opal_dev;
273 u32 max_integrity_segments;
274 u32 max_discard_sectors;
275 u32 max_discard_segments;
276 u32 max_zeroes_sectors;
277 #ifdef CONFIG_BLK_DEV_ZONED
287 atomic_t abort_limit;
299 unsigned int shutdown_timeout;
302 unsigned long quirks;
303 struct nvme_id_power_state psd[32];
304 struct nvme_effects_log *effects;
306 struct work_struct scan_work;
307 struct work_struct async_event_work;
308 struct delayed_work ka_work;
309 struct delayed_work failfast_work;
310 struct nvme_command ka_cmd;
311 struct work_struct fw_act_work;
312 unsigned long events;
314 #ifdef CONFIG_NVME_MULTIPATH
315 /* asymmetric namespace access: */
320 struct mutex ana_lock;
321 struct nvme_ana_rsp_hdr *ana_log_buf;
323 struct timer_list anatt_timer;
324 struct work_struct ana_work;
327 /* Power saving configuration */
328 u64 ps_max_latency_us;
344 #define NVME_CTRL_FAILFAST_EXPIRED 0
345 struct nvmf_ctrl_options *opts;
347 struct page *discard_page;
348 unsigned long discard_page_busy;
350 struct nvme_fault_inject fault_inject;
358 struct nvme_subsystem {
362 * Because we unregister the device on the last put we need
363 * a separate refcount.
366 struct list_head entry;
368 struct list_head ctrls;
369 struct list_head nsheads;
370 char subnqn[NVMF_NQN_SIZE];
373 char firmware_rev[8];
376 u16 awupf; /* 0's based awupf value. */
378 #ifdef CONFIG_NVME_MULTIPATH
379 enum nvme_iopolicy iopolicy;
384 * Container structure for uniqueue namespace identifiers.
394 * Anchor structure for namespaces. There is one for each namespace in a
395 * NVMe subsystem that any of our controllers can see, and the namespace
396 * structure for each controller is chained of it. For private namespaces
397 * there is a 1:1 relation to our namespace structures, that is ->list
398 * only ever has a single entry for private namespaces.
400 struct nvme_ns_head {
401 struct list_head list;
402 struct srcu_struct srcu;
403 struct nvme_subsystem *subsys;
405 struct nvme_ns_ids ids;
406 struct list_head entry;
410 struct nvme_effects_log *effects;
413 struct device cdev_device;
415 struct gendisk *disk;
416 #ifdef CONFIG_NVME_MULTIPATH
417 struct bio_list requeue_list;
418 spinlock_t requeue_lock;
419 struct work_struct requeue_work;
422 #define NVME_NSHEAD_DISK_LIVE 0
423 struct nvme_ns __rcu *current_path[];
427 static inline bool nvme_ns_head_multipath(struct nvme_ns_head *head)
429 return IS_ENABLED(CONFIG_NVME_MULTIPATH) && head->disk;
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;
449 struct nvme_ns_head *head;
456 #ifdef CONFIG_BLK_DEV_ZONED
459 unsigned long features;
461 #define NVME_NS_REMOVING 0
462 #define NVME_NS_DEAD 1
463 #define NVME_NS_ANA_PENDING 2
464 #define NVME_NS_FORCE_RO 3
465 #define NVME_NS_READY 4
468 struct device cdev_device;
470 struct nvme_fault_inject fault_inject;
474 /* NVMe ns supports metadata actions by the controller (generate/strip) */
475 static inline bool nvme_ns_has_pi(struct nvme_ns *ns)
477 return ns->pi_type && ns->ms == sizeof(struct t10_pi_tuple);
480 struct nvme_ctrl_ops {
482 struct module *module;
484 #define NVME_F_FABRICS (1 << 0)
485 #define NVME_F_METADATA_SUPPORTED (1 << 1)
486 #define NVME_F_PCI_P2PDMA (1 << 2)
487 int (*reg_read32)(struct nvme_ctrl *ctrl, u32 off, u32 *val);
488 int (*reg_write32)(struct nvme_ctrl *ctrl, u32 off, u32 val);
489 int (*reg_read64)(struct nvme_ctrl *ctrl, u32 off, u64 *val);
490 void (*free_ctrl)(struct nvme_ctrl *ctrl);
491 void (*submit_async_event)(struct nvme_ctrl *ctrl);
492 void (*delete_ctrl)(struct nvme_ctrl *ctrl);
493 int (*get_address)(struct nvme_ctrl *ctrl, char *buf, int size);
497 * nvme command_id is constructed as such:
498 * | xxxx | xxxxxxxxxxxx |
501 #define nvme_genctr_mask(gen) (gen & 0xf)
502 #define nvme_cid_install_genctr(gen) (nvme_genctr_mask(gen) << 12)
503 #define nvme_genctr_from_cid(cid) ((cid & 0xf000) >> 12)
504 #define nvme_tag_from_cid(cid) (cid & 0xfff)
506 static inline u16 nvme_cid(struct request *rq)
508 return nvme_cid_install_genctr(nvme_req(rq)->genctr) | rq->tag;
511 static inline struct request *nvme_find_rq(struct blk_mq_tags *tags,
514 u8 genctr = nvme_genctr_from_cid(command_id);
515 u16 tag = nvme_tag_from_cid(command_id);
518 rq = blk_mq_tag_to_rq(tags, tag);
520 pr_err("could not locate request for tag %#x\n",
524 if (unlikely(nvme_genctr_mask(nvme_req(rq)->genctr) != genctr)) {
525 dev_err(nvme_req(rq)->ctrl->device,
526 "request %#x genctr mismatch (got %#x expected %#x)\n",
527 tag, genctr, nvme_genctr_mask(nvme_req(rq)->genctr));
533 static inline struct request *nvme_cid_to_rq(struct blk_mq_tags *tags,
536 return blk_mq_tag_to_rq(tags, nvme_tag_from_cid(command_id));
539 #ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
540 void nvme_fault_inject_init(struct nvme_fault_inject *fault_inj,
541 const char *dev_name);
542 void nvme_fault_inject_fini(struct nvme_fault_inject *fault_inject);
543 void nvme_should_fail(struct request *req);
545 static inline void nvme_fault_inject_init(struct nvme_fault_inject *fault_inj,
546 const char *dev_name)
549 static inline void nvme_fault_inject_fini(struct nvme_fault_inject *fault_inj)
552 static inline void nvme_should_fail(struct request *req) {}
555 static inline int nvme_reset_subsystem(struct nvme_ctrl *ctrl)
557 if (!ctrl->subsystem)
559 return ctrl->ops->reg_write32(ctrl, NVME_REG_NSSR, 0x4E564D65);
563 * Convert a 512B sector number to a device logical block number.
565 static inline u64 nvme_sect_to_lba(struct nvme_ns *ns, sector_t sector)
567 return sector >> (ns->lba_shift - SECTOR_SHIFT);
571 * Convert a device logical block number to a 512B sector number.
573 static inline sector_t nvme_lba_to_sect(struct nvme_ns *ns, u64 lba)
575 return lba << (ns->lba_shift - SECTOR_SHIFT);
579 * Convert byte length to nvme's 0-based num dwords
581 static inline u32 nvme_bytes_to_numd(size_t len)
583 return (len >> 2) - 1;
586 static inline bool nvme_is_ana_error(u16 status)
588 switch (status & 0x7ff) {
589 case NVME_SC_ANA_TRANSITION:
590 case NVME_SC_ANA_INACCESSIBLE:
591 case NVME_SC_ANA_PERSISTENT_LOSS:
598 static inline bool nvme_is_path_error(u16 status)
600 /* check for a status code type of 'path related status' */
601 return (status & 0x700) == 0x300;
605 * Fill in the status and result information from the CQE, and then figure out
606 * if blk-mq will need to use IPI magic to complete the request, and if yes do
607 * so. If not let the caller complete the request without an indirect function
610 static inline bool nvme_try_complete_req(struct request *req, __le16 status,
611 union nvme_result result)
613 struct nvme_request *rq = nvme_req(req);
615 rq->status = le16_to_cpu(status) >> 1;
617 /* inject error when permitted by fault injection framework */
618 nvme_should_fail(req);
619 if (unlikely(blk_should_fake_timeout(req->q)))
621 return blk_mq_complete_request_remote(req);
624 static inline void nvme_get_ctrl(struct nvme_ctrl *ctrl)
626 get_device(ctrl->device);
629 static inline void nvme_put_ctrl(struct nvme_ctrl *ctrl)
631 put_device(ctrl->device);
634 static inline bool nvme_is_aen_req(u16 qid, __u16 command_id)
637 nvme_tag_from_cid(command_id) >= NVME_AQ_BLK_MQ_DEPTH;
640 void nvme_complete_rq(struct request *req);
641 blk_status_t nvme_host_path_error(struct request *req);
642 bool nvme_cancel_request(struct request *req, void *data, bool reserved);
643 void nvme_cancel_tagset(struct nvme_ctrl *ctrl);
644 void nvme_cancel_admin_tagset(struct nvme_ctrl *ctrl);
645 bool nvme_change_ctrl_state(struct nvme_ctrl *ctrl,
646 enum nvme_ctrl_state new_state);
647 bool nvme_wait_reset(struct nvme_ctrl *ctrl);
648 int nvme_disable_ctrl(struct nvme_ctrl *ctrl);
649 int nvme_enable_ctrl(struct nvme_ctrl *ctrl);
650 int nvme_shutdown_ctrl(struct nvme_ctrl *ctrl);
651 int nvme_init_ctrl(struct nvme_ctrl *ctrl, struct device *dev,
652 const struct nvme_ctrl_ops *ops, unsigned long quirks);
653 void nvme_uninit_ctrl(struct nvme_ctrl *ctrl);
654 void nvme_start_ctrl(struct nvme_ctrl *ctrl);
655 void nvme_stop_ctrl(struct nvme_ctrl *ctrl);
656 int nvme_init_ctrl_finish(struct nvme_ctrl *ctrl);
658 void nvme_remove_namespaces(struct nvme_ctrl *ctrl);
660 int nvme_sec_submit(void *data, u16 spsp, u8 secp, void *buffer, size_t len,
663 void nvme_complete_async_event(struct nvme_ctrl *ctrl, __le16 status,
664 volatile union nvme_result *res);
666 void nvme_stop_queues(struct nvme_ctrl *ctrl);
667 void nvme_start_queues(struct nvme_ctrl *ctrl);
668 void nvme_kill_queues(struct nvme_ctrl *ctrl);
669 void nvme_sync_queues(struct nvme_ctrl *ctrl);
670 void nvme_sync_io_queues(struct nvme_ctrl *ctrl);
671 void nvme_unfreeze(struct nvme_ctrl *ctrl);
672 void nvme_wait_freeze(struct nvme_ctrl *ctrl);
673 int nvme_wait_freeze_timeout(struct nvme_ctrl *ctrl, long timeout);
674 void nvme_start_freeze(struct nvme_ctrl *ctrl);
676 #define NVME_QID_ANY -1
677 struct request *nvme_alloc_request(struct request_queue *q,
678 struct nvme_command *cmd, blk_mq_req_flags_t flags);
679 void nvme_cleanup_cmd(struct request *req);
680 blk_status_t nvme_setup_cmd(struct nvme_ns *ns, struct request *req);
681 blk_status_t nvme_fail_nonready_command(struct nvme_ctrl *ctrl,
682 struct request *req);
683 bool __nvme_check_ready(struct nvme_ctrl *ctrl, struct request *rq,
686 static inline bool nvme_check_ready(struct nvme_ctrl *ctrl, struct request *rq,
689 if (likely(ctrl->state == NVME_CTRL_LIVE))
691 if (ctrl->ops->flags & NVME_F_FABRICS &&
692 ctrl->state == NVME_CTRL_DELETING)
694 return __nvme_check_ready(ctrl, rq, queue_live);
696 int nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd,
697 void *buf, unsigned bufflen);
698 int __nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd,
699 union nvme_result *result, void *buffer, unsigned bufflen,
700 unsigned timeout, int qid, int at_head,
701 blk_mq_req_flags_t flags);
702 int nvme_set_features(struct nvme_ctrl *dev, unsigned int fid,
703 unsigned int dword11, void *buffer, size_t buflen,
705 int nvme_get_features(struct nvme_ctrl *dev, unsigned int fid,
706 unsigned int dword11, void *buffer, size_t buflen,
708 int nvme_set_queue_count(struct nvme_ctrl *ctrl, int *count);
709 void nvme_stop_keep_alive(struct nvme_ctrl *ctrl);
710 int nvme_reset_ctrl(struct nvme_ctrl *ctrl);
711 int nvme_reset_ctrl_sync(struct nvme_ctrl *ctrl);
712 int nvme_try_sched_reset(struct nvme_ctrl *ctrl);
713 int nvme_delete_ctrl(struct nvme_ctrl *ctrl);
714 void nvme_queue_scan(struct nvme_ctrl *ctrl);
715 int nvme_get_log(struct nvme_ctrl *ctrl, u32 nsid, u8 log_page, u8 lsp, u8 csi,
716 void *log, size_t size, u64 offset);
717 bool nvme_tryget_ns_head(struct nvme_ns_head *head);
718 void nvme_put_ns_head(struct nvme_ns_head *head);
719 int nvme_cdev_add(struct cdev *cdev, struct device *cdev_device,
720 const struct file_operations *fops, struct module *owner);
721 void nvme_cdev_del(struct cdev *cdev, struct device *cdev_device);
722 int nvme_ioctl(struct block_device *bdev, fmode_t mode,
723 unsigned int cmd, unsigned long arg);
724 long nvme_ns_chr_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
725 int nvme_ns_head_ioctl(struct block_device *bdev, fmode_t mode,
726 unsigned int cmd, unsigned long arg);
727 long nvme_ns_head_chr_ioctl(struct file *file, unsigned int cmd,
729 long nvme_dev_ioctl(struct file *file, unsigned int cmd,
731 int nvme_getgeo(struct block_device *bdev, struct hd_geometry *geo);
733 extern const struct attribute_group *nvme_ns_id_attr_groups[];
734 extern const struct pr_ops nvme_pr_ops;
735 extern const struct block_device_operations nvme_ns_head_ops;
737 struct nvme_ns *nvme_find_path(struct nvme_ns_head *head);
738 #ifdef CONFIG_NVME_MULTIPATH
739 static inline bool nvme_ctrl_use_ana(struct nvme_ctrl *ctrl)
741 return ctrl->ana_log_buf != NULL;
744 void nvme_mpath_unfreeze(struct nvme_subsystem *subsys);
745 void nvme_mpath_wait_freeze(struct nvme_subsystem *subsys);
746 void nvme_mpath_start_freeze(struct nvme_subsystem *subsys);
747 bool nvme_mpath_set_disk_name(struct nvme_ns *ns, char *disk_name, int *flags);
748 void nvme_failover_req(struct request *req);
749 void nvme_kick_requeue_lists(struct nvme_ctrl *ctrl);
750 int nvme_mpath_alloc_disk(struct nvme_ctrl *ctrl,struct nvme_ns_head *head);
751 void nvme_mpath_add_disk(struct nvme_ns *ns, struct nvme_id_ns *id);
752 void nvme_mpath_remove_disk(struct nvme_ns_head *head);
753 int nvme_mpath_init_identify(struct nvme_ctrl *ctrl, struct nvme_id_ctrl *id);
754 void nvme_mpath_init_ctrl(struct nvme_ctrl *ctrl);
755 void nvme_mpath_uninit(struct nvme_ctrl *ctrl);
756 void nvme_mpath_stop(struct nvme_ctrl *ctrl);
757 bool nvme_mpath_clear_current_path(struct nvme_ns *ns);
758 void nvme_mpath_revalidate_paths(struct nvme_ns *ns);
759 void nvme_mpath_clear_ctrl_paths(struct nvme_ctrl *ctrl);
760 void nvme_mpath_shutdown_disk(struct nvme_ns_head *head);
762 static inline void nvme_trace_bio_complete(struct request *req)
764 struct nvme_ns *ns = req->q->queuedata;
766 if (req->cmd_flags & REQ_NVME_MPATH)
767 trace_block_bio_complete(ns->head->disk->queue, req->bio);
770 extern struct device_attribute dev_attr_ana_grpid;
771 extern struct device_attribute dev_attr_ana_state;
772 extern struct device_attribute subsys_attr_iopolicy;
775 static inline bool nvme_ctrl_use_ana(struct nvme_ctrl *ctrl)
779 static inline bool nvme_mpath_set_disk_name(struct nvme_ns *ns, char *disk_name,
784 static inline void nvme_failover_req(struct request *req)
787 static inline void nvme_kick_requeue_lists(struct nvme_ctrl *ctrl)
790 static inline int nvme_mpath_alloc_disk(struct nvme_ctrl *ctrl,
791 struct nvme_ns_head *head)
795 static inline void nvme_mpath_add_disk(struct nvme_ns *ns,
796 struct nvme_id_ns *id)
799 static inline void nvme_mpath_remove_disk(struct nvme_ns_head *head)
802 static inline bool nvme_mpath_clear_current_path(struct nvme_ns *ns)
806 static inline void nvme_mpath_revalidate_paths(struct nvme_ns *ns)
809 static inline void nvme_mpath_clear_ctrl_paths(struct nvme_ctrl *ctrl)
812 static inline void nvme_mpath_shutdown_disk(struct nvme_ns_head *head)
815 static inline void nvme_trace_bio_complete(struct request *req)
818 static inline void nvme_mpath_init_ctrl(struct nvme_ctrl *ctrl)
821 static inline int nvme_mpath_init_identify(struct nvme_ctrl *ctrl,
822 struct nvme_id_ctrl *id)
824 if (ctrl->subsys->cmic & NVME_CTRL_CMIC_ANA)
825 dev_warn(ctrl->device,
826 "Please enable CONFIG_NVME_MULTIPATH for full support of multi-port devices.\n");
829 static inline void nvme_mpath_uninit(struct nvme_ctrl *ctrl)
832 static inline void nvme_mpath_stop(struct nvme_ctrl *ctrl)
835 static inline void nvme_mpath_unfreeze(struct nvme_subsystem *subsys)
838 static inline void nvme_mpath_wait_freeze(struct nvme_subsystem *subsys)
841 static inline void nvme_mpath_start_freeze(struct nvme_subsystem *subsys)
844 #endif /* CONFIG_NVME_MULTIPATH */
846 int nvme_revalidate_zones(struct nvme_ns *ns);
847 int nvme_ns_report_zones(struct nvme_ns *ns, sector_t sector,
848 unsigned int nr_zones, report_zones_cb cb, void *data);
849 #ifdef CONFIG_BLK_DEV_ZONED
850 int nvme_update_zone_info(struct nvme_ns *ns, unsigned lbaf);
851 blk_status_t nvme_setup_zone_mgmt_send(struct nvme_ns *ns, struct request *req,
852 struct nvme_command *cmnd,
853 enum nvme_zone_mgmt_action action);
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;
870 static inline struct nvme_ns *nvme_get_ns_from_dev(struct device *dev)
872 return dev_to_disk(dev)->private_data;
875 #ifdef CONFIG_NVME_HWMON
876 int nvme_hwmon_init(struct nvme_ctrl *ctrl);
877 void nvme_hwmon_exit(struct nvme_ctrl *ctrl);
879 static inline int nvme_hwmon_init(struct nvme_ctrl *ctrl)
884 static inline void nvme_hwmon_exit(struct nvme_ctrl *ctrl)
889 static inline bool nvme_ctrl_sgl_supported(struct nvme_ctrl *ctrl)
891 return ctrl->sgls & ((1 << 0) | (1 << 1));
894 u32 nvme_command_effects(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
896 int nvme_execute_passthru_rq(struct request *rq);
897 struct nvme_ctrl *nvme_ctrl_from_file(struct file *file);
898 struct nvme_ns *nvme_find_get_ns(struct nvme_ctrl *ctrl, unsigned nsid);
899 void nvme_put_ns(struct nvme_ns *ns);
901 static inline bool nvme_multi_css(struct nvme_ctrl *ctrl)
903 return (ctrl->ctrl_config & NVME_CC_CSS_MASK) == NVME_CC_CSS_CSI;