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
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;
304 struct work_struct scan_work;
305 struct work_struct async_event_work;
306 struct delayed_work ka_work;
307 struct delayed_work failfast_work;
308 struct nvme_command ka_cmd;
309 struct work_struct fw_act_work;
310 unsigned long events;
312 #ifdef CONFIG_NVME_MULTIPATH
313 /* asymmetric namespace access: */
318 struct mutex ana_lock;
319 struct nvme_ana_rsp_hdr *ana_log_buf;
321 struct timer_list anatt_timer;
322 struct work_struct ana_work;
325 /* Power saving configuration */
326 u64 ps_max_latency_us;
342 #define NVME_CTRL_FAILFAST_EXPIRED 0
343 #define NVME_CTRL_ADMIN_Q_STOPPED 1
344 struct nvmf_ctrl_options *opts;
346 struct page *discard_page;
347 unsigned long discard_page_busy;
349 struct nvme_fault_inject fault_inject;
351 enum nvme_ctrl_type cntrltype;
352 enum nvme_dctype dctype;
360 struct nvme_subsystem {
364 * Because we unregister the device on the last put we need
365 * a separate refcount.
368 struct list_head entry;
370 struct list_head ctrls;
371 struct list_head nsheads;
372 char subnqn[NVMF_NQN_SIZE];
375 char firmware_rev[8];
377 enum nvme_subsys_type subtype;
379 u16 awupf; /* 0's based awupf value. */
381 #ifdef CONFIG_NVME_MULTIPATH
382 enum nvme_iopolicy iopolicy;
387 * Container structure for uniqueue namespace identifiers.
397 * Anchor structure for namespaces. There is one for each namespace in a
398 * NVMe subsystem that any of our controllers can see, and the namespace
399 * structure for each controller is chained of it. For private namespaces
400 * there is a 1:1 relation to our namespace structures, that is ->list
401 * only ever has a single entry for private namespaces.
403 struct nvme_ns_head {
404 struct list_head list;
405 struct srcu_struct srcu;
406 struct nvme_subsystem *subsys;
408 struct nvme_ns_ids ids;
409 struct list_head entry;
413 struct nvme_effects_log *effects;
416 struct device cdev_device;
418 struct gendisk *disk;
419 #ifdef CONFIG_NVME_MULTIPATH
420 struct bio_list requeue_list;
421 spinlock_t requeue_lock;
422 struct work_struct requeue_work;
425 #define NVME_NSHEAD_DISK_LIVE 0
426 struct nvme_ns __rcu *current_path[];
430 static inline bool nvme_ns_head_multipath(struct nvme_ns_head *head)
432 return IS_ENABLED(CONFIG_NVME_MULTIPATH) && head->disk;
435 enum nvme_ns_features {
436 NVME_NS_EXT_LBAS = 1 << 0, /* support extended LBA format */
437 NVME_NS_METADATA_SUPPORTED = 1 << 1, /* support getting generated md */
441 struct list_head list;
443 struct nvme_ctrl *ctrl;
444 struct request_queue *queue;
445 struct gendisk *disk;
446 #ifdef CONFIG_NVME_MULTIPATH
447 enum nvme_ana_state ana_state;
450 struct list_head siblings;
452 struct nvme_ns_head *head;
461 #ifdef CONFIG_BLK_DEV_ZONED
464 unsigned long features;
466 #define NVME_NS_REMOVING 0
467 #define NVME_NS_DEAD 1
468 #define NVME_NS_ANA_PENDING 2
469 #define NVME_NS_FORCE_RO 3
470 #define NVME_NS_READY 4
471 #define NVME_NS_STOPPED 5
474 struct device cdev_device;
476 struct nvme_fault_inject fault_inject;
480 /* NVMe ns supports metadata actions by the controller (generate/strip) */
481 static inline bool nvme_ns_has_pi(struct nvme_ns *ns)
483 return ns->pi_type && ns->ms == ns->pi_size;
486 struct nvme_ctrl_ops {
488 struct module *module;
490 #define NVME_F_FABRICS (1 << 0)
491 #define NVME_F_METADATA_SUPPORTED (1 << 1)
492 #define NVME_F_PCI_P2PDMA (1 << 2)
493 int (*reg_read32)(struct nvme_ctrl *ctrl, u32 off, u32 *val);
494 int (*reg_write32)(struct nvme_ctrl *ctrl, u32 off, u32 val);
495 int (*reg_read64)(struct nvme_ctrl *ctrl, u32 off, u64 *val);
496 void (*free_ctrl)(struct nvme_ctrl *ctrl);
497 void (*submit_async_event)(struct nvme_ctrl *ctrl);
498 void (*delete_ctrl)(struct nvme_ctrl *ctrl);
499 int (*get_address)(struct nvme_ctrl *ctrl, char *buf, int size);
503 * nvme command_id is constructed as such:
504 * | xxxx | xxxxxxxxxxxx |
507 #define nvme_genctr_mask(gen) (gen & 0xf)
508 #define nvme_cid_install_genctr(gen) (nvme_genctr_mask(gen) << 12)
509 #define nvme_genctr_from_cid(cid) ((cid & 0xf000) >> 12)
510 #define nvme_tag_from_cid(cid) (cid & 0xfff)
512 static inline u16 nvme_cid(struct request *rq)
514 return nvme_cid_install_genctr(nvme_req(rq)->genctr) | rq->tag;
517 static inline struct request *nvme_find_rq(struct blk_mq_tags *tags,
520 u8 genctr = nvme_genctr_from_cid(command_id);
521 u16 tag = nvme_tag_from_cid(command_id);
524 rq = blk_mq_tag_to_rq(tags, tag);
526 pr_err("could not locate request for tag %#x\n",
530 if (unlikely(nvme_genctr_mask(nvme_req(rq)->genctr) != genctr)) {
531 dev_err(nvme_req(rq)->ctrl->device,
532 "request %#x genctr mismatch (got %#x expected %#x)\n",
533 tag, genctr, nvme_genctr_mask(nvme_req(rq)->genctr));
539 static inline struct request *nvme_cid_to_rq(struct blk_mq_tags *tags,
542 return blk_mq_tag_to_rq(tags, nvme_tag_from_cid(command_id));
545 #ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
546 void nvme_fault_inject_init(struct nvme_fault_inject *fault_inj,
547 const char *dev_name);
548 void nvme_fault_inject_fini(struct nvme_fault_inject *fault_inject);
549 void nvme_should_fail(struct request *req);
551 static inline void nvme_fault_inject_init(struct nvme_fault_inject *fault_inj,
552 const char *dev_name)
555 static inline void nvme_fault_inject_fini(struct nvme_fault_inject *fault_inj)
558 static inline void nvme_should_fail(struct request *req) {}
561 static inline int nvme_reset_subsystem(struct nvme_ctrl *ctrl)
563 if (!ctrl->subsystem)
565 return ctrl->ops->reg_write32(ctrl, NVME_REG_NSSR, 0x4E564D65);
569 * Convert a 512B sector number to a device logical block number.
571 static inline u64 nvme_sect_to_lba(struct nvme_ns *ns, sector_t sector)
573 return sector >> (ns->lba_shift - SECTOR_SHIFT);
577 * Convert a device logical block number to a 512B sector number.
579 static inline sector_t nvme_lba_to_sect(struct nvme_ns *ns, u64 lba)
581 return lba << (ns->lba_shift - SECTOR_SHIFT);
585 * Convert byte length to nvme's 0-based num dwords
587 static inline u32 nvme_bytes_to_numd(size_t len)
589 return (len >> 2) - 1;
592 static inline bool nvme_is_ana_error(u16 status)
594 switch (status & 0x7ff) {
595 case NVME_SC_ANA_TRANSITION:
596 case NVME_SC_ANA_INACCESSIBLE:
597 case NVME_SC_ANA_PERSISTENT_LOSS:
604 static inline bool nvme_is_path_error(u16 status)
606 /* check for a status code type of 'path related status' */
607 return (status & 0x700) == 0x300;
611 * Fill in the status and result information from the CQE, and then figure out
612 * if blk-mq will need to use IPI magic to complete the request, and if yes do
613 * so. If not let the caller complete the request without an indirect function
616 static inline bool nvme_try_complete_req(struct request *req, __le16 status,
617 union nvme_result result)
619 struct nvme_request *rq = nvme_req(req);
620 struct nvme_ctrl *ctrl = rq->ctrl;
622 if (!(ctrl->quirks & NVME_QUIRK_SKIP_CID_GEN))
625 rq->status = le16_to_cpu(status) >> 1;
627 /* inject error when permitted by fault injection framework */
628 nvme_should_fail(req);
629 if (unlikely(blk_should_fake_timeout(req->q)))
631 return blk_mq_complete_request_remote(req);
634 static inline void nvme_get_ctrl(struct nvme_ctrl *ctrl)
636 get_device(ctrl->device);
639 static inline void nvme_put_ctrl(struct nvme_ctrl *ctrl)
641 put_device(ctrl->device);
644 static inline bool nvme_is_aen_req(u16 qid, __u16 command_id)
647 nvme_tag_from_cid(command_id) >= NVME_AQ_BLK_MQ_DEPTH;
650 void nvme_complete_rq(struct request *req);
651 void nvme_complete_batch_req(struct request *req);
653 static __always_inline void nvme_complete_batch(struct io_comp_batch *iob,
654 void (*fn)(struct request *rq))
658 rq_list_for_each(&iob->req_list, req) {
660 nvme_complete_batch_req(req);
662 blk_mq_end_request_batch(iob);
665 blk_status_t nvme_host_path_error(struct request *req);
666 bool nvme_cancel_request(struct request *req, void *data, bool reserved);
667 void nvme_cancel_tagset(struct nvme_ctrl *ctrl);
668 void nvme_cancel_admin_tagset(struct nvme_ctrl *ctrl);
669 bool nvme_change_ctrl_state(struct nvme_ctrl *ctrl,
670 enum nvme_ctrl_state new_state);
671 bool nvme_wait_reset(struct nvme_ctrl *ctrl);
672 int nvme_disable_ctrl(struct nvme_ctrl *ctrl);
673 int nvme_enable_ctrl(struct nvme_ctrl *ctrl);
674 int nvme_shutdown_ctrl(struct nvme_ctrl *ctrl);
675 int nvme_init_ctrl(struct nvme_ctrl *ctrl, struct device *dev,
676 const struct nvme_ctrl_ops *ops, unsigned long quirks);
677 void nvme_uninit_ctrl(struct nvme_ctrl *ctrl);
678 void nvme_start_ctrl(struct nvme_ctrl *ctrl);
679 void nvme_stop_ctrl(struct nvme_ctrl *ctrl);
680 int nvme_init_ctrl_finish(struct nvme_ctrl *ctrl);
682 void nvme_remove_namespaces(struct nvme_ctrl *ctrl);
684 int nvme_sec_submit(void *data, u16 spsp, u8 secp, void *buffer, size_t len,
687 void nvme_complete_async_event(struct nvme_ctrl *ctrl, __le16 status,
688 volatile union nvme_result *res);
690 void nvme_stop_queues(struct nvme_ctrl *ctrl);
691 void nvme_start_queues(struct nvme_ctrl *ctrl);
692 void nvme_stop_admin_queue(struct nvme_ctrl *ctrl);
693 void nvme_start_admin_queue(struct nvme_ctrl *ctrl);
694 void nvme_kill_queues(struct nvme_ctrl *ctrl);
695 void nvme_sync_queues(struct nvme_ctrl *ctrl);
696 void nvme_sync_io_queues(struct nvme_ctrl *ctrl);
697 void nvme_unfreeze(struct nvme_ctrl *ctrl);
698 void nvme_wait_freeze(struct nvme_ctrl *ctrl);
699 int nvme_wait_freeze_timeout(struct nvme_ctrl *ctrl, long timeout);
700 void nvme_start_freeze(struct nvme_ctrl *ctrl);
702 static inline unsigned int nvme_req_op(struct nvme_command *cmd)
704 return nvme_is_write(cmd) ? REQ_OP_DRV_OUT : REQ_OP_DRV_IN;
707 #define NVME_QID_ANY -1
708 void nvme_init_request(struct request *req, struct nvme_command *cmd);
709 void nvme_cleanup_cmd(struct request *req);
710 blk_status_t nvme_setup_cmd(struct nvme_ns *ns, struct request *req);
711 blk_status_t nvme_fail_nonready_command(struct nvme_ctrl *ctrl,
712 struct request *req);
713 bool __nvme_check_ready(struct nvme_ctrl *ctrl, struct request *rq,
716 static inline bool nvme_check_ready(struct nvme_ctrl *ctrl, struct request *rq,
719 if (likely(ctrl->state == NVME_CTRL_LIVE))
721 if (ctrl->ops->flags & NVME_F_FABRICS &&
722 ctrl->state == NVME_CTRL_DELETING)
724 return __nvme_check_ready(ctrl, rq, queue_live);
726 int nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd,
727 void *buf, unsigned bufflen);
728 int __nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd,
729 union nvme_result *result, void *buffer, unsigned bufflen,
730 unsigned timeout, int qid, int at_head,
731 blk_mq_req_flags_t flags);
732 int nvme_set_features(struct nvme_ctrl *dev, unsigned int fid,
733 unsigned int dword11, void *buffer, size_t buflen,
735 int nvme_get_features(struct nvme_ctrl *dev, unsigned int fid,
736 unsigned int dword11, void *buffer, size_t buflen,
738 int nvme_set_queue_count(struct nvme_ctrl *ctrl, int *count);
739 void nvme_stop_keep_alive(struct nvme_ctrl *ctrl);
740 int nvme_reset_ctrl(struct nvme_ctrl *ctrl);
741 int nvme_reset_ctrl_sync(struct nvme_ctrl *ctrl);
742 int nvme_try_sched_reset(struct nvme_ctrl *ctrl);
743 int nvme_delete_ctrl(struct nvme_ctrl *ctrl);
744 void nvme_queue_scan(struct nvme_ctrl *ctrl);
745 int nvme_get_log(struct nvme_ctrl *ctrl, u32 nsid, u8 log_page, u8 lsp, u8 csi,
746 void *log, size_t size, u64 offset);
747 bool nvme_tryget_ns_head(struct nvme_ns_head *head);
748 void nvme_put_ns_head(struct nvme_ns_head *head);
749 int nvme_cdev_add(struct cdev *cdev, struct device *cdev_device,
750 const struct file_operations *fops, struct module *owner);
751 void nvme_cdev_del(struct cdev *cdev, struct device *cdev_device);
752 int nvme_ioctl(struct block_device *bdev, fmode_t mode,
753 unsigned int cmd, unsigned long arg);
754 long nvme_ns_chr_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
755 int nvme_ns_head_ioctl(struct block_device *bdev, fmode_t mode,
756 unsigned int cmd, unsigned long arg);
757 long nvme_ns_head_chr_ioctl(struct file *file, unsigned int cmd,
759 long nvme_dev_ioctl(struct file *file, unsigned int cmd,
761 int nvme_getgeo(struct block_device *bdev, struct hd_geometry *geo);
763 extern const struct attribute_group *nvme_ns_id_attr_groups[];
764 extern const struct pr_ops nvme_pr_ops;
765 extern const struct block_device_operations nvme_ns_head_ops;
767 struct nvme_ns *nvme_find_path(struct nvme_ns_head *head);
768 #ifdef CONFIG_NVME_MULTIPATH
769 static inline bool nvme_ctrl_use_ana(struct nvme_ctrl *ctrl)
771 return ctrl->ana_log_buf != NULL;
774 void nvme_mpath_unfreeze(struct nvme_subsystem *subsys);
775 void nvme_mpath_wait_freeze(struct nvme_subsystem *subsys);
776 void nvme_mpath_start_freeze(struct nvme_subsystem *subsys);
777 void nvme_mpath_default_iopolicy(struct nvme_subsystem *subsys);
778 void nvme_failover_req(struct request *req);
779 void nvme_kick_requeue_lists(struct nvme_ctrl *ctrl);
780 int nvme_mpath_alloc_disk(struct nvme_ctrl *ctrl,struct nvme_ns_head *head);
781 void nvme_mpath_add_disk(struct nvme_ns *ns, struct nvme_id_ns *id);
782 void nvme_mpath_remove_disk(struct nvme_ns_head *head);
783 int nvme_mpath_init_identify(struct nvme_ctrl *ctrl, struct nvme_id_ctrl *id);
784 void nvme_mpath_init_ctrl(struct nvme_ctrl *ctrl);
785 void nvme_mpath_uninit(struct nvme_ctrl *ctrl);
786 void nvme_mpath_stop(struct nvme_ctrl *ctrl);
787 bool nvme_mpath_clear_current_path(struct nvme_ns *ns);
788 void nvme_mpath_revalidate_paths(struct nvme_ns *ns);
789 void nvme_mpath_clear_ctrl_paths(struct nvme_ctrl *ctrl);
790 void nvme_mpath_shutdown_disk(struct nvme_ns_head *head);
792 static inline void nvme_trace_bio_complete(struct request *req)
794 struct nvme_ns *ns = req->q->queuedata;
796 if (req->cmd_flags & REQ_NVME_MPATH)
797 trace_block_bio_complete(ns->head->disk->queue, req->bio);
800 extern bool multipath;
801 extern struct device_attribute dev_attr_ana_grpid;
802 extern struct device_attribute dev_attr_ana_state;
803 extern struct device_attribute subsys_attr_iopolicy;
806 #define multipath false
807 static inline bool nvme_ctrl_use_ana(struct nvme_ctrl *ctrl)
811 static inline void nvme_failover_req(struct request *req)
814 static inline void nvme_kick_requeue_lists(struct nvme_ctrl *ctrl)
817 static inline int nvme_mpath_alloc_disk(struct nvme_ctrl *ctrl,
818 struct nvme_ns_head *head)
822 static inline void nvme_mpath_add_disk(struct nvme_ns *ns,
823 struct nvme_id_ns *id)
826 static inline void nvme_mpath_remove_disk(struct nvme_ns_head *head)
829 static inline bool nvme_mpath_clear_current_path(struct nvme_ns *ns)
833 static inline void nvme_mpath_revalidate_paths(struct nvme_ns *ns)
836 static inline void nvme_mpath_clear_ctrl_paths(struct nvme_ctrl *ctrl)
839 static inline void nvme_mpath_shutdown_disk(struct nvme_ns_head *head)
842 static inline void nvme_trace_bio_complete(struct request *req)
845 static inline void nvme_mpath_init_ctrl(struct nvme_ctrl *ctrl)
848 static inline int nvme_mpath_init_identify(struct nvme_ctrl *ctrl,
849 struct nvme_id_ctrl *id)
851 if (ctrl->subsys->cmic & NVME_CTRL_CMIC_ANA)
852 dev_warn(ctrl->device,
853 "Please enable CONFIG_NVME_MULTIPATH for full support of multi-port devices.\n");
856 static inline void nvme_mpath_uninit(struct nvme_ctrl *ctrl)
859 static inline void nvme_mpath_stop(struct nvme_ctrl *ctrl)
862 static inline void nvme_mpath_unfreeze(struct nvme_subsystem *subsys)
865 static inline void nvme_mpath_wait_freeze(struct nvme_subsystem *subsys)
868 static inline void nvme_mpath_start_freeze(struct nvme_subsystem *subsys)
871 static inline void nvme_mpath_default_iopolicy(struct nvme_subsystem *subsys)
874 #endif /* CONFIG_NVME_MULTIPATH */
876 int nvme_revalidate_zones(struct nvme_ns *ns);
877 int nvme_ns_report_zones(struct nvme_ns *ns, sector_t sector,
878 unsigned int nr_zones, report_zones_cb cb, void *data);
879 #ifdef CONFIG_BLK_DEV_ZONED
880 int nvme_update_zone_info(struct nvme_ns *ns, unsigned lbaf);
881 blk_status_t nvme_setup_zone_mgmt_send(struct nvme_ns *ns, struct request *req,
882 struct nvme_command *cmnd,
883 enum nvme_zone_mgmt_action action);
885 static inline blk_status_t nvme_setup_zone_mgmt_send(struct nvme_ns *ns,
886 struct request *req, struct nvme_command *cmnd,
887 enum nvme_zone_mgmt_action action)
889 return BLK_STS_NOTSUPP;
892 static inline int nvme_update_zone_info(struct nvme_ns *ns, unsigned lbaf)
894 dev_warn(ns->ctrl->device,
895 "Please enable CONFIG_BLK_DEV_ZONED to support ZNS devices\n");
896 return -EPROTONOSUPPORT;
900 static inline int nvme_ctrl_init_connect_q(struct nvme_ctrl *ctrl)
902 ctrl->connect_q = blk_mq_init_queue(ctrl->tagset);
903 if (IS_ERR(ctrl->connect_q))
904 return PTR_ERR(ctrl->connect_q);
908 static inline struct nvme_ns *nvme_get_ns_from_dev(struct device *dev)
910 return dev_to_disk(dev)->private_data;
913 #ifdef CONFIG_NVME_HWMON
914 int nvme_hwmon_init(struct nvme_ctrl *ctrl);
915 void nvme_hwmon_exit(struct nvme_ctrl *ctrl);
917 static inline int nvme_hwmon_init(struct nvme_ctrl *ctrl)
922 static inline void nvme_hwmon_exit(struct nvme_ctrl *ctrl)
927 static inline bool nvme_ctrl_sgl_supported(struct nvme_ctrl *ctrl)
929 return ctrl->sgls & ((1 << 0) | (1 << 1));
932 u32 nvme_command_effects(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
934 int nvme_execute_passthru_rq(struct request *rq);
935 struct nvme_ctrl *nvme_ctrl_from_file(struct file *file);
936 struct nvme_ns *nvme_find_get_ns(struct nvme_ctrl *ctrl, unsigned nsid);
937 void nvme_put_ns(struct nvme_ns *ns);
939 static inline bool nvme_multi_css(struct nvme_ctrl *ctrl)
941 return (ctrl->ctrl_config & NVME_CC_CSS_MASK) == NVME_CC_CSS_CSI;
944 #ifdef CONFIG_NVME_VERBOSE_ERRORS
945 const unsigned char *nvme_get_error_status_str(u16 status);
946 const unsigned char *nvme_get_opcode_str(u8 opcode);
947 const unsigned char *nvme_get_admin_opcode_str(u8 opcode);
948 #else /* CONFIG_NVME_VERBOSE_ERRORS */
949 static inline const unsigned char *nvme_get_error_status_str(u16 status)
953 static inline const unsigned char *nvme_get_opcode_str(u8 opcode)
957 static inline const unsigned char *nvme_get_admin_opcode_str(u8 opcode)
961 #endif /* CONFIG_NVME_VERBOSE_ERRORS */