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;
459 #ifdef CONFIG_BLK_DEV_ZONED
462 unsigned long features;
464 #define NVME_NS_REMOVING 0
465 #define NVME_NS_DEAD 1
466 #define NVME_NS_ANA_PENDING 2
467 #define NVME_NS_FORCE_RO 3
468 #define NVME_NS_READY 4
469 #define NVME_NS_STOPPED 5
472 struct device cdev_device;
474 struct nvme_fault_inject fault_inject;
478 /* NVMe ns supports metadata actions by the controller (generate/strip) */
479 static inline bool nvme_ns_has_pi(struct nvme_ns *ns)
481 return ns->pi_type && ns->ms == sizeof(struct t10_pi_tuple);
484 struct nvme_ctrl_ops {
486 struct module *module;
488 #define NVME_F_FABRICS (1 << 0)
489 #define NVME_F_METADATA_SUPPORTED (1 << 1)
490 #define NVME_F_PCI_P2PDMA (1 << 2)
491 int (*reg_read32)(struct nvme_ctrl *ctrl, u32 off, u32 *val);
492 int (*reg_write32)(struct nvme_ctrl *ctrl, u32 off, u32 val);
493 int (*reg_read64)(struct nvme_ctrl *ctrl, u32 off, u64 *val);
494 void (*free_ctrl)(struct nvme_ctrl *ctrl);
495 void (*submit_async_event)(struct nvme_ctrl *ctrl);
496 void (*delete_ctrl)(struct nvme_ctrl *ctrl);
497 int (*get_address)(struct nvme_ctrl *ctrl, char *buf, int size);
501 * nvme command_id is constructed as such:
502 * | xxxx | xxxxxxxxxxxx |
505 #define nvme_genctr_mask(gen) (gen & 0xf)
506 #define nvme_cid_install_genctr(gen) (nvme_genctr_mask(gen) << 12)
507 #define nvme_genctr_from_cid(cid) ((cid & 0xf000) >> 12)
508 #define nvme_tag_from_cid(cid) (cid & 0xfff)
510 static inline u16 nvme_cid(struct request *rq)
512 return nvme_cid_install_genctr(nvme_req(rq)->genctr) | rq->tag;
515 static inline struct request *nvme_find_rq(struct blk_mq_tags *tags,
518 u8 genctr = nvme_genctr_from_cid(command_id);
519 u16 tag = nvme_tag_from_cid(command_id);
522 rq = blk_mq_tag_to_rq(tags, tag);
524 pr_err("could not locate request for tag %#x\n",
528 if (unlikely(nvme_genctr_mask(nvme_req(rq)->genctr) != genctr)) {
529 dev_err(nvme_req(rq)->ctrl->device,
530 "request %#x genctr mismatch (got %#x expected %#x)\n",
531 tag, genctr, nvme_genctr_mask(nvme_req(rq)->genctr));
537 static inline struct request *nvme_cid_to_rq(struct blk_mq_tags *tags,
540 return blk_mq_tag_to_rq(tags, nvme_tag_from_cid(command_id));
543 #ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
544 void nvme_fault_inject_init(struct nvme_fault_inject *fault_inj,
545 const char *dev_name);
546 void nvme_fault_inject_fini(struct nvme_fault_inject *fault_inject);
547 void nvme_should_fail(struct request *req);
549 static inline void nvme_fault_inject_init(struct nvme_fault_inject *fault_inj,
550 const char *dev_name)
553 static inline void nvme_fault_inject_fini(struct nvme_fault_inject *fault_inj)
556 static inline void nvme_should_fail(struct request *req) {}
559 static inline int nvme_reset_subsystem(struct nvme_ctrl *ctrl)
561 if (!ctrl->subsystem)
563 return ctrl->ops->reg_write32(ctrl, NVME_REG_NSSR, 0x4E564D65);
567 * Convert a 512B sector number to a device logical block number.
569 static inline u64 nvme_sect_to_lba(struct nvme_ns *ns, sector_t sector)
571 return sector >> (ns->lba_shift - SECTOR_SHIFT);
575 * Convert a device logical block number to a 512B sector number.
577 static inline sector_t nvme_lba_to_sect(struct nvme_ns *ns, u64 lba)
579 return lba << (ns->lba_shift - SECTOR_SHIFT);
583 * Convert byte length to nvme's 0-based num dwords
585 static inline u32 nvme_bytes_to_numd(size_t len)
587 return (len >> 2) - 1;
590 static inline bool nvme_is_ana_error(u16 status)
592 switch (status & 0x7ff) {
593 case NVME_SC_ANA_TRANSITION:
594 case NVME_SC_ANA_INACCESSIBLE:
595 case NVME_SC_ANA_PERSISTENT_LOSS:
602 static inline bool nvme_is_path_error(u16 status)
604 /* check for a status code type of 'path related status' */
605 return (status & 0x700) == 0x300;
609 * Fill in the status and result information from the CQE, and then figure out
610 * if blk-mq will need to use IPI magic to complete the request, and if yes do
611 * so. If not let the caller complete the request without an indirect function
614 static inline bool nvme_try_complete_req(struct request *req, __le16 status,
615 union nvme_result result)
617 struct nvme_request *rq = nvme_req(req);
618 struct nvme_ctrl *ctrl = rq->ctrl;
620 if (!(ctrl->quirks & NVME_QUIRK_SKIP_CID_GEN))
623 rq->status = le16_to_cpu(status) >> 1;
625 /* inject error when permitted by fault injection framework */
626 nvme_should_fail(req);
627 if (unlikely(blk_should_fake_timeout(req->q)))
629 return blk_mq_complete_request_remote(req);
632 static inline void nvme_get_ctrl(struct nvme_ctrl *ctrl)
634 get_device(ctrl->device);
637 static inline void nvme_put_ctrl(struct nvme_ctrl *ctrl)
639 put_device(ctrl->device);
642 static inline bool nvme_is_aen_req(u16 qid, __u16 command_id)
645 nvme_tag_from_cid(command_id) >= NVME_AQ_BLK_MQ_DEPTH;
648 void nvme_complete_rq(struct request *req);
649 void nvme_complete_batch_req(struct request *req);
651 static __always_inline void nvme_complete_batch(struct io_comp_batch *iob,
652 void (*fn)(struct request *rq))
656 rq_list_for_each(&iob->req_list, req) {
658 nvme_complete_batch_req(req);
660 blk_mq_end_request_batch(iob);
663 blk_status_t nvme_host_path_error(struct request *req);
664 bool nvme_cancel_request(struct request *req, void *data, bool reserved);
665 void nvme_cancel_tagset(struct nvme_ctrl *ctrl);
666 void nvme_cancel_admin_tagset(struct nvme_ctrl *ctrl);
667 bool nvme_change_ctrl_state(struct nvme_ctrl *ctrl,
668 enum nvme_ctrl_state new_state);
669 bool nvme_wait_reset(struct nvme_ctrl *ctrl);
670 int nvme_disable_ctrl(struct nvme_ctrl *ctrl);
671 int nvme_enable_ctrl(struct nvme_ctrl *ctrl);
672 int nvme_shutdown_ctrl(struct nvme_ctrl *ctrl);
673 int nvme_init_ctrl(struct nvme_ctrl *ctrl, struct device *dev,
674 const struct nvme_ctrl_ops *ops, unsigned long quirks);
675 void nvme_uninit_ctrl(struct nvme_ctrl *ctrl);
676 void nvme_start_ctrl(struct nvme_ctrl *ctrl);
677 void nvme_stop_ctrl(struct nvme_ctrl *ctrl);
678 int nvme_init_ctrl_finish(struct nvme_ctrl *ctrl);
680 void nvme_remove_namespaces(struct nvme_ctrl *ctrl);
682 int nvme_sec_submit(void *data, u16 spsp, u8 secp, void *buffer, size_t len,
685 void nvme_complete_async_event(struct nvme_ctrl *ctrl, __le16 status,
686 volatile union nvme_result *res);
688 void nvme_stop_queues(struct nvme_ctrl *ctrl);
689 void nvme_start_queues(struct nvme_ctrl *ctrl);
690 void nvme_stop_admin_queue(struct nvme_ctrl *ctrl);
691 void nvme_start_admin_queue(struct nvme_ctrl *ctrl);
692 void nvme_kill_queues(struct nvme_ctrl *ctrl);
693 void nvme_sync_queues(struct nvme_ctrl *ctrl);
694 void nvme_sync_io_queues(struct nvme_ctrl *ctrl);
695 void nvme_unfreeze(struct nvme_ctrl *ctrl);
696 void nvme_wait_freeze(struct nvme_ctrl *ctrl);
697 int nvme_wait_freeze_timeout(struct nvme_ctrl *ctrl, long timeout);
698 void nvme_start_freeze(struct nvme_ctrl *ctrl);
700 static inline unsigned int nvme_req_op(struct nvme_command *cmd)
702 return nvme_is_write(cmd) ? REQ_OP_DRV_OUT : REQ_OP_DRV_IN;
705 #define NVME_QID_ANY -1
706 void nvme_init_request(struct request *req, struct nvme_command *cmd);
707 void nvme_cleanup_cmd(struct request *req);
708 blk_status_t nvme_setup_cmd(struct nvme_ns *ns, struct request *req);
709 blk_status_t nvme_fail_nonready_command(struct nvme_ctrl *ctrl,
710 struct request *req);
711 bool __nvme_check_ready(struct nvme_ctrl *ctrl, struct request *rq,
714 static inline bool nvme_check_ready(struct nvme_ctrl *ctrl, struct request *rq,
717 if (likely(ctrl->state == NVME_CTRL_LIVE))
719 if (ctrl->ops->flags & NVME_F_FABRICS &&
720 ctrl->state == NVME_CTRL_DELETING)
722 return __nvme_check_ready(ctrl, rq, queue_live);
724 int nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd,
725 void *buf, unsigned bufflen);
726 int __nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd,
727 union nvme_result *result, void *buffer, unsigned bufflen,
728 unsigned timeout, int qid, int at_head,
729 blk_mq_req_flags_t flags);
730 int nvme_set_features(struct nvme_ctrl *dev, unsigned int fid,
731 unsigned int dword11, void *buffer, size_t buflen,
733 int nvme_get_features(struct nvme_ctrl *dev, unsigned int fid,
734 unsigned int dword11, void *buffer, size_t buflen,
736 int nvme_set_queue_count(struct nvme_ctrl *ctrl, int *count);
737 void nvme_stop_keep_alive(struct nvme_ctrl *ctrl);
738 int nvme_reset_ctrl(struct nvme_ctrl *ctrl);
739 int nvme_reset_ctrl_sync(struct nvme_ctrl *ctrl);
740 int nvme_try_sched_reset(struct nvme_ctrl *ctrl);
741 int nvme_delete_ctrl(struct nvme_ctrl *ctrl);
742 void nvme_queue_scan(struct nvme_ctrl *ctrl);
743 int nvme_get_log(struct nvme_ctrl *ctrl, u32 nsid, u8 log_page, u8 lsp, u8 csi,
744 void *log, size_t size, u64 offset);
745 bool nvme_tryget_ns_head(struct nvme_ns_head *head);
746 void nvme_put_ns_head(struct nvme_ns_head *head);
747 int nvme_cdev_add(struct cdev *cdev, struct device *cdev_device,
748 const struct file_operations *fops, struct module *owner);
749 void nvme_cdev_del(struct cdev *cdev, struct device *cdev_device);
750 int nvme_ioctl(struct block_device *bdev, fmode_t mode,
751 unsigned int cmd, unsigned long arg);
752 long nvme_ns_chr_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
753 int nvme_ns_head_ioctl(struct block_device *bdev, fmode_t mode,
754 unsigned int cmd, unsigned long arg);
755 long nvme_ns_head_chr_ioctl(struct file *file, unsigned int cmd,
757 long nvme_dev_ioctl(struct file *file, unsigned int cmd,
759 int nvme_getgeo(struct block_device *bdev, struct hd_geometry *geo);
761 extern const struct attribute_group *nvme_ns_id_attr_groups[];
762 extern const struct pr_ops nvme_pr_ops;
763 extern const struct block_device_operations nvme_ns_head_ops;
765 struct nvme_ns *nvme_find_path(struct nvme_ns_head *head);
766 #ifdef CONFIG_NVME_MULTIPATH
767 static inline bool nvme_ctrl_use_ana(struct nvme_ctrl *ctrl)
769 return ctrl->ana_log_buf != NULL;
772 void nvme_mpath_unfreeze(struct nvme_subsystem *subsys);
773 void nvme_mpath_wait_freeze(struct nvme_subsystem *subsys);
774 void nvme_mpath_start_freeze(struct nvme_subsystem *subsys);
775 void nvme_mpath_default_iopolicy(struct nvme_subsystem *subsys);
776 void nvme_failover_req(struct request *req);
777 void nvme_kick_requeue_lists(struct nvme_ctrl *ctrl);
778 int nvme_mpath_alloc_disk(struct nvme_ctrl *ctrl,struct nvme_ns_head *head);
779 void nvme_mpath_add_disk(struct nvme_ns *ns, struct nvme_id_ns *id);
780 void nvme_mpath_remove_disk(struct nvme_ns_head *head);
781 int nvme_mpath_init_identify(struct nvme_ctrl *ctrl, struct nvme_id_ctrl *id);
782 void nvme_mpath_init_ctrl(struct nvme_ctrl *ctrl);
783 void nvme_mpath_uninit(struct nvme_ctrl *ctrl);
784 void nvme_mpath_stop(struct nvme_ctrl *ctrl);
785 bool nvme_mpath_clear_current_path(struct nvme_ns *ns);
786 void nvme_mpath_revalidate_paths(struct nvme_ns *ns);
787 void nvme_mpath_clear_ctrl_paths(struct nvme_ctrl *ctrl);
788 void nvme_mpath_shutdown_disk(struct nvme_ns_head *head);
790 static inline void nvme_trace_bio_complete(struct request *req)
792 struct nvme_ns *ns = req->q->queuedata;
794 if (req->cmd_flags & REQ_NVME_MPATH)
795 trace_block_bio_complete(ns->head->disk->queue, req->bio);
798 extern bool multipath;
799 extern struct device_attribute dev_attr_ana_grpid;
800 extern struct device_attribute dev_attr_ana_state;
801 extern struct device_attribute subsys_attr_iopolicy;
804 #define multipath false
805 static inline bool nvme_ctrl_use_ana(struct nvme_ctrl *ctrl)
809 static inline void nvme_failover_req(struct request *req)
812 static inline void nvme_kick_requeue_lists(struct nvme_ctrl *ctrl)
815 static inline int nvme_mpath_alloc_disk(struct nvme_ctrl *ctrl,
816 struct nvme_ns_head *head)
820 static inline void nvme_mpath_add_disk(struct nvme_ns *ns,
821 struct nvme_id_ns *id)
824 static inline void nvme_mpath_remove_disk(struct nvme_ns_head *head)
827 static inline bool nvme_mpath_clear_current_path(struct nvme_ns *ns)
831 static inline void nvme_mpath_revalidate_paths(struct nvme_ns *ns)
834 static inline void nvme_mpath_clear_ctrl_paths(struct nvme_ctrl *ctrl)
837 static inline void nvme_mpath_shutdown_disk(struct nvme_ns_head *head)
840 static inline void nvme_trace_bio_complete(struct request *req)
843 static inline void nvme_mpath_init_ctrl(struct nvme_ctrl *ctrl)
846 static inline int nvme_mpath_init_identify(struct nvme_ctrl *ctrl,
847 struct nvme_id_ctrl *id)
849 if (ctrl->subsys->cmic & NVME_CTRL_CMIC_ANA)
850 dev_warn(ctrl->device,
851 "Please enable CONFIG_NVME_MULTIPATH for full support of multi-port devices.\n");
854 static inline void nvme_mpath_uninit(struct nvme_ctrl *ctrl)
857 static inline void nvme_mpath_stop(struct nvme_ctrl *ctrl)
860 static inline void nvme_mpath_unfreeze(struct nvme_subsystem *subsys)
863 static inline void nvme_mpath_wait_freeze(struct nvme_subsystem *subsys)
866 static inline void nvme_mpath_start_freeze(struct nvme_subsystem *subsys)
869 static inline void nvme_mpath_default_iopolicy(struct nvme_subsystem *subsys)
872 #endif /* CONFIG_NVME_MULTIPATH */
874 int nvme_revalidate_zones(struct nvme_ns *ns);
875 int nvme_ns_report_zones(struct nvme_ns *ns, sector_t sector,
876 unsigned int nr_zones, report_zones_cb cb, void *data);
877 #ifdef CONFIG_BLK_DEV_ZONED
878 int nvme_update_zone_info(struct nvme_ns *ns, unsigned lbaf);
879 blk_status_t nvme_setup_zone_mgmt_send(struct nvme_ns *ns, struct request *req,
880 struct nvme_command *cmnd,
881 enum nvme_zone_mgmt_action action);
883 static inline blk_status_t nvme_setup_zone_mgmt_send(struct nvme_ns *ns,
884 struct request *req, struct nvme_command *cmnd,
885 enum nvme_zone_mgmt_action action)
887 return BLK_STS_NOTSUPP;
890 static inline int nvme_update_zone_info(struct nvme_ns *ns, unsigned lbaf)
892 dev_warn(ns->ctrl->device,
893 "Please enable CONFIG_BLK_DEV_ZONED to support ZNS devices\n");
894 return -EPROTONOSUPPORT;
898 static inline int nvme_ctrl_init_connect_q(struct nvme_ctrl *ctrl)
900 ctrl->connect_q = blk_mq_init_queue(ctrl->tagset);
901 if (IS_ERR(ctrl->connect_q))
902 return PTR_ERR(ctrl->connect_q);
906 static inline struct nvme_ns *nvme_get_ns_from_dev(struct device *dev)
908 return dev_to_disk(dev)->private_data;
911 #ifdef CONFIG_NVME_HWMON
912 int nvme_hwmon_init(struct nvme_ctrl *ctrl);
913 void nvme_hwmon_exit(struct nvme_ctrl *ctrl);
915 static inline int nvme_hwmon_init(struct nvme_ctrl *ctrl)
920 static inline void nvme_hwmon_exit(struct nvme_ctrl *ctrl)
925 static inline bool nvme_ctrl_sgl_supported(struct nvme_ctrl *ctrl)
927 return ctrl->sgls & ((1 << 0) | (1 << 1));
930 u32 nvme_command_effects(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
932 int nvme_execute_passthru_rq(struct request *rq);
933 struct nvme_ctrl *nvme_ctrl_from_file(struct file *file);
934 struct nvme_ns *nvme_find_get_ns(struct nvme_ctrl *ctrl, unsigned nsid);
935 void nvme_put_ns(struct nvme_ns *ns);
937 static inline bool nvme_multi_css(struct nvme_ctrl *ctrl)
939 return (ctrl->ctrl_config & NVME_CC_CSS_MASK) == NVME_CC_CSS_CSI;
942 #ifdef CONFIG_NVME_VERBOSE_ERRORS
943 const unsigned char *nvme_get_error_status_str(u16 status);
944 const unsigned char *nvme_get_opcode_str(u8 opcode);
945 const unsigned char *nvme_get_admin_opcode_str(u8 opcode);
946 #else /* CONFIG_NVME_VERBOSE_ERRORS */
947 static inline const unsigned char *nvme_get_error_status_str(u16 status)
951 static inline const unsigned char *nvme_get_opcode_str(u8 opcode)
955 static inline const unsigned char *nvme_get_admin_opcode_str(u8 opcode)
959 #endif /* CONFIG_NVME_VERBOSE_ERRORS */