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 limited, so skip
144 * encoding the generation sequence number.
146 NVME_QUIRK_SKIP_CID_GEN = (1 << 17),
149 * Reports garbage in the namespace identifiers (eui64, nguid, uuid).
151 NVME_QUIRK_BOGUS_NID = (1 << 18),
155 * Common request structure for NVMe passthrough. All drivers must have
156 * this structure as the first member of their request-private data.
158 struct nvme_request {
159 struct nvme_command *cmd;
160 union nvme_result result;
165 #ifdef CONFIG_NVME_MULTIPATH
166 unsigned long start_time;
168 struct nvme_ctrl *ctrl;
172 * Mark a bio as coming in through the mpath node.
174 #define REQ_NVME_MPATH REQ_DRV
177 NVME_REQ_CANCELLED = (1 << 0),
178 NVME_REQ_USERCMD = (1 << 1),
179 NVME_MPATH_IO_STATS = (1 << 2),
182 static inline struct nvme_request *nvme_req(struct request *req)
184 return blk_mq_rq_to_pdu(req);
187 static inline u16 nvme_req_qid(struct request *req)
189 if (!req->q->queuedata)
192 return req->mq_hctx->queue_num + 1;
195 /* The below value is the specific amount of delay needed before checking
196 * readiness in case of the PCI_DEVICE(0x1c58, 0x0003), which needs the
197 * NVME_QUIRK_DELAY_BEFORE_CHK_RDY quirk enabled. The value (in ms) was
200 #define NVME_QUIRK_DELAY_AMOUNT 2300
203 * enum nvme_ctrl_state: Controller state
205 * @NVME_CTRL_NEW: New controller just allocated, initial state
206 * @NVME_CTRL_LIVE: Controller is connected and I/O capable
207 * @NVME_CTRL_RESETTING: Controller is resetting (or scheduled reset)
208 * @NVME_CTRL_CONNECTING: Controller is disconnected, now connecting the
210 * @NVME_CTRL_DELETING: Controller is deleting (or scheduled deletion)
211 * @NVME_CTRL_DELETING_NOIO: Controller is deleting and I/O is not
212 * disabled/failed immediately. This state comes
213 * after all async event processing took place and
214 * before ns removal and the controller deletion
216 * @NVME_CTRL_DEAD: Controller is non-present/unresponsive during
217 * shutdown or removal. In this case we forcibly
218 * kill all inflight I/O as they have no chance to
221 enum nvme_ctrl_state {
225 NVME_CTRL_CONNECTING,
227 NVME_CTRL_DELETING_NOIO,
231 struct nvme_fault_inject {
232 #ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
233 struct fault_attr attr;
234 struct dentry *parent;
235 bool dont_retry; /* DNR, do not retry */
236 u16 status; /* status code */
240 enum nvme_ctrl_flags {
241 NVME_CTRL_FAILFAST_EXPIRED = 0,
242 NVME_CTRL_ADMIN_Q_STOPPED = 1,
243 NVME_CTRL_STARTED_ONCE = 2,
244 NVME_CTRL_STOPPED = 3,
249 enum nvme_ctrl_state state;
252 struct mutex scan_lock;
253 const struct nvme_ctrl_ops *ops;
254 struct request_queue *admin_q;
255 struct request_queue *connect_q;
256 struct request_queue *fabrics_q;
260 struct blk_mq_tag_set *tagset;
261 struct blk_mq_tag_set *admin_tagset;
262 struct list_head namespaces;
263 struct rw_semaphore namespaces_rwsem;
264 struct device ctrl_device;
265 struct device *device; /* char device */
266 #ifdef CONFIG_NVME_HWMON
267 struct device *hwmon_device;
270 struct work_struct reset_work;
271 struct work_struct delete_work;
272 wait_queue_head_t state_wq;
274 struct nvme_subsystem *subsys;
275 struct list_head subsys_entry;
277 struct opal_dev *opal_dev;
289 u32 max_integrity_segments;
290 u32 max_discard_sectors;
291 u32 max_discard_segments;
292 u32 max_zeroes_sectors;
293 #ifdef CONFIG_BLK_DEV_ZONED
302 atomic_t abort_limit;
314 unsigned int shutdown_timeout;
317 unsigned long quirks;
318 struct nvme_id_power_state psd[32];
319 struct nvme_effects_log *effects;
321 struct work_struct scan_work;
322 struct work_struct async_event_work;
323 struct delayed_work ka_work;
324 struct delayed_work failfast_work;
325 struct nvme_command ka_cmd;
326 struct work_struct fw_act_work;
327 unsigned long events;
329 #ifdef CONFIG_NVME_MULTIPATH
330 /* asymmetric namespace access: */
335 struct mutex ana_lock;
336 struct nvme_ana_rsp_hdr *ana_log_buf;
338 struct timer_list anatt_timer;
339 struct work_struct ana_work;
342 #ifdef CONFIG_NVME_AUTH
343 struct work_struct dhchap_auth_work;
344 struct mutex dhchap_auth_mutex;
345 struct nvme_dhchap_queue_context *dhchap_ctxs;
346 struct nvme_dhchap_key *host_key;
347 struct nvme_dhchap_key *ctrl_key;
351 /* Power saving configuration */
352 u64 ps_max_latency_us;
368 struct nvmf_ctrl_options *opts;
370 struct page *discard_page;
371 unsigned long discard_page_busy;
373 struct nvme_fault_inject fault_inject;
375 enum nvme_ctrl_type cntrltype;
376 enum nvme_dctype dctype;
384 struct nvme_subsystem {
388 * Because we unregister the device on the last put we need
389 * a separate refcount.
392 struct list_head entry;
394 struct list_head ctrls;
395 struct list_head nsheads;
396 char subnqn[NVMF_NQN_SIZE];
399 char firmware_rev[8];
401 enum nvme_subsys_type subtype;
403 u16 awupf; /* 0's based awupf value. */
405 #ifdef CONFIG_NVME_MULTIPATH
406 enum nvme_iopolicy iopolicy;
411 * Container structure for uniqueue namespace identifiers.
421 * Anchor structure for namespaces. There is one for each namespace in a
422 * NVMe subsystem that any of our controllers can see, and the namespace
423 * structure for each controller is chained of it. For private namespaces
424 * there is a 1:1 relation to our namespace structures, that is ->list
425 * only ever has a single entry for private namespaces.
427 struct nvme_ns_head {
428 struct list_head list;
429 struct srcu_struct srcu;
430 struct nvme_subsystem *subsys;
432 struct nvme_ns_ids ids;
433 struct list_head entry;
437 struct nvme_effects_log *effects;
440 struct device cdev_device;
442 struct gendisk *disk;
443 #ifdef CONFIG_NVME_MULTIPATH
444 struct bio_list requeue_list;
445 spinlock_t requeue_lock;
446 struct work_struct requeue_work;
449 #define NVME_NSHEAD_DISK_LIVE 0
450 struct nvme_ns __rcu *current_path[];
454 static inline bool nvme_ns_head_multipath(struct nvme_ns_head *head)
456 return IS_ENABLED(CONFIG_NVME_MULTIPATH) && head->disk;
459 enum nvme_ns_features {
460 NVME_NS_EXT_LBAS = 1 << 0, /* support extended LBA format */
461 NVME_NS_METADATA_SUPPORTED = 1 << 1, /* support getting generated md */
462 NVME_NS_DEAC, /* DEAC bit in Write Zeores supported */
466 struct list_head list;
468 struct nvme_ctrl *ctrl;
469 struct request_queue *queue;
470 struct gendisk *disk;
471 #ifdef CONFIG_NVME_MULTIPATH
472 enum nvme_ana_state ana_state;
475 struct list_head siblings;
477 struct nvme_ns_head *head;
486 #ifdef CONFIG_BLK_DEV_ZONED
489 unsigned long features;
491 #define NVME_NS_REMOVING 0
492 #define NVME_NS_ANA_PENDING 2
493 #define NVME_NS_FORCE_RO 3
494 #define NVME_NS_READY 4
497 struct device cdev_device;
499 struct nvme_fault_inject fault_inject;
503 /* NVMe ns supports metadata actions by the controller (generate/strip) */
504 static inline bool nvme_ns_has_pi(struct nvme_ns *ns)
506 return ns->pi_type && ns->ms == ns->pi_size;
509 struct nvme_ctrl_ops {
511 struct module *module;
513 #define NVME_F_FABRICS (1 << 0)
514 #define NVME_F_METADATA_SUPPORTED (1 << 1)
515 #define NVME_F_BLOCKING (1 << 2)
517 const struct attribute_group **dev_attr_groups;
518 int (*reg_read32)(struct nvme_ctrl *ctrl, u32 off, u32 *val);
519 int (*reg_write32)(struct nvme_ctrl *ctrl, u32 off, u32 val);
520 int (*reg_read64)(struct nvme_ctrl *ctrl, u32 off, u64 *val);
521 void (*free_ctrl)(struct nvme_ctrl *ctrl);
522 void (*submit_async_event)(struct nvme_ctrl *ctrl);
523 void (*delete_ctrl)(struct nvme_ctrl *ctrl);
524 void (*stop_ctrl)(struct nvme_ctrl *ctrl);
525 int (*get_address)(struct nvme_ctrl *ctrl, char *buf, int size);
526 void (*print_device_info)(struct nvme_ctrl *ctrl);
527 bool (*supports_pci_p2pdma)(struct nvme_ctrl *ctrl);
531 * nvme command_id is constructed as such:
532 * | xxxx | xxxxxxxxxxxx |
535 #define nvme_genctr_mask(gen) (gen & 0xf)
536 #define nvme_cid_install_genctr(gen) (nvme_genctr_mask(gen) << 12)
537 #define nvme_genctr_from_cid(cid) ((cid & 0xf000) >> 12)
538 #define nvme_tag_from_cid(cid) (cid & 0xfff)
540 static inline u16 nvme_cid(struct request *rq)
542 return nvme_cid_install_genctr(nvme_req(rq)->genctr) | rq->tag;
545 static inline struct request *nvme_find_rq(struct blk_mq_tags *tags,
548 u8 genctr = nvme_genctr_from_cid(command_id);
549 u16 tag = nvme_tag_from_cid(command_id);
552 rq = blk_mq_tag_to_rq(tags, tag);
554 pr_err("could not locate request for tag %#x\n",
558 if (unlikely(nvme_genctr_mask(nvme_req(rq)->genctr) != genctr)) {
559 dev_err(nvme_req(rq)->ctrl->device,
560 "request %#x genctr mismatch (got %#x expected %#x)\n",
561 tag, genctr, nvme_genctr_mask(nvme_req(rq)->genctr));
567 static inline struct request *nvme_cid_to_rq(struct blk_mq_tags *tags,
570 return blk_mq_tag_to_rq(tags, nvme_tag_from_cid(command_id));
574 * Return the length of the string without the space padding
576 static inline int nvme_strlen(char *s, int len)
578 while (s[len - 1] == ' ')
583 static inline void nvme_print_device_info(struct nvme_ctrl *ctrl)
585 struct nvme_subsystem *subsys = ctrl->subsys;
587 if (ctrl->ops->print_device_info) {
588 ctrl->ops->print_device_info(ctrl);
592 dev_err(ctrl->device,
593 "VID:%04x model:%.*s firmware:%.*s\n", subsys->vendor_id,
594 nvme_strlen(subsys->model, sizeof(subsys->model)),
595 subsys->model, nvme_strlen(subsys->firmware_rev,
596 sizeof(subsys->firmware_rev)),
597 subsys->firmware_rev);
600 #ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
601 void nvme_fault_inject_init(struct nvme_fault_inject *fault_inj,
602 const char *dev_name);
603 void nvme_fault_inject_fini(struct nvme_fault_inject *fault_inject);
604 void nvme_should_fail(struct request *req);
606 static inline void nvme_fault_inject_init(struct nvme_fault_inject *fault_inj,
607 const char *dev_name)
610 static inline void nvme_fault_inject_fini(struct nvme_fault_inject *fault_inj)
613 static inline void nvme_should_fail(struct request *req) {}
616 bool nvme_wait_reset(struct nvme_ctrl *ctrl);
617 int nvme_try_sched_reset(struct nvme_ctrl *ctrl);
619 static inline int nvme_reset_subsystem(struct nvme_ctrl *ctrl)
623 if (!ctrl->subsystem)
625 if (!nvme_wait_reset(ctrl))
628 ret = ctrl->ops->reg_write32(ctrl, NVME_REG_NSSR, 0x4E564D65);
632 return nvme_try_sched_reset(ctrl);
636 * Convert a 512B sector number to a device logical block number.
638 static inline u64 nvme_sect_to_lba(struct nvme_ns *ns, sector_t sector)
640 return sector >> (ns->lba_shift - SECTOR_SHIFT);
644 * Convert a device logical block number to a 512B sector number.
646 static inline sector_t nvme_lba_to_sect(struct nvme_ns *ns, u64 lba)
648 return lba << (ns->lba_shift - SECTOR_SHIFT);
652 * Convert byte length to nvme's 0-based num dwords
654 static inline u32 nvme_bytes_to_numd(size_t len)
656 return (len >> 2) - 1;
659 static inline bool nvme_is_ana_error(u16 status)
661 switch (status & 0x7ff) {
662 case NVME_SC_ANA_TRANSITION:
663 case NVME_SC_ANA_INACCESSIBLE:
664 case NVME_SC_ANA_PERSISTENT_LOSS:
671 static inline bool nvme_is_path_error(u16 status)
673 /* check for a status code type of 'path related status' */
674 return (status & 0x700) == 0x300;
678 * Fill in the status and result information from the CQE, and then figure out
679 * if blk-mq will need to use IPI magic to complete the request, and if yes do
680 * so. If not let the caller complete the request without an indirect function
683 static inline bool nvme_try_complete_req(struct request *req, __le16 status,
684 union nvme_result result)
686 struct nvme_request *rq = nvme_req(req);
687 struct nvme_ctrl *ctrl = rq->ctrl;
689 if (!(ctrl->quirks & NVME_QUIRK_SKIP_CID_GEN))
692 rq->status = le16_to_cpu(status) >> 1;
694 /* inject error when permitted by fault injection framework */
695 nvme_should_fail(req);
696 if (unlikely(blk_should_fake_timeout(req->q)))
698 return blk_mq_complete_request_remote(req);
701 static inline void nvme_get_ctrl(struct nvme_ctrl *ctrl)
703 get_device(ctrl->device);
706 static inline void nvme_put_ctrl(struct nvme_ctrl *ctrl)
708 put_device(ctrl->device);
711 static inline bool nvme_is_aen_req(u16 qid, __u16 command_id)
714 nvme_tag_from_cid(command_id) >= NVME_AQ_BLK_MQ_DEPTH;
717 void nvme_complete_rq(struct request *req);
718 void nvme_complete_batch_req(struct request *req);
720 static __always_inline void nvme_complete_batch(struct io_comp_batch *iob,
721 void (*fn)(struct request *rq))
725 rq_list_for_each(&iob->req_list, req) {
727 nvme_complete_batch_req(req);
729 blk_mq_end_request_batch(iob);
732 blk_status_t nvme_host_path_error(struct request *req);
733 bool nvme_cancel_request(struct request *req, void *data);
734 void nvme_cancel_tagset(struct nvme_ctrl *ctrl);
735 void nvme_cancel_admin_tagset(struct nvme_ctrl *ctrl);
736 bool nvme_change_ctrl_state(struct nvme_ctrl *ctrl,
737 enum nvme_ctrl_state new_state);
738 int nvme_disable_ctrl(struct nvme_ctrl *ctrl, bool shutdown);
739 int nvme_enable_ctrl(struct nvme_ctrl *ctrl);
740 int nvme_init_ctrl(struct nvme_ctrl *ctrl, struct device *dev,
741 const struct nvme_ctrl_ops *ops, unsigned long quirks);
742 void nvme_uninit_ctrl(struct nvme_ctrl *ctrl);
743 void nvme_start_ctrl(struct nvme_ctrl *ctrl);
744 void nvme_stop_ctrl(struct nvme_ctrl *ctrl);
745 int nvme_init_ctrl_finish(struct nvme_ctrl *ctrl, bool was_suspended);
746 int nvme_alloc_admin_tag_set(struct nvme_ctrl *ctrl, struct blk_mq_tag_set *set,
747 const struct blk_mq_ops *ops, unsigned int cmd_size);
748 void nvme_remove_admin_tag_set(struct nvme_ctrl *ctrl);
749 int nvme_alloc_io_tag_set(struct nvme_ctrl *ctrl, struct blk_mq_tag_set *set,
750 const struct blk_mq_ops *ops, unsigned int nr_maps,
751 unsigned int cmd_size);
752 void nvme_remove_io_tag_set(struct nvme_ctrl *ctrl);
754 void nvme_remove_namespaces(struct nvme_ctrl *ctrl);
756 void nvme_complete_async_event(struct nvme_ctrl *ctrl, __le16 status,
757 volatile union nvme_result *res);
759 void nvme_quiesce_io_queues(struct nvme_ctrl *ctrl);
760 void nvme_unquiesce_io_queues(struct nvme_ctrl *ctrl);
761 void nvme_quiesce_admin_queue(struct nvme_ctrl *ctrl);
762 void nvme_unquiesce_admin_queue(struct nvme_ctrl *ctrl);
763 void nvme_mark_namespaces_dead(struct nvme_ctrl *ctrl);
764 void nvme_sync_queues(struct nvme_ctrl *ctrl);
765 void nvme_sync_io_queues(struct nvme_ctrl *ctrl);
766 void nvme_unfreeze(struct nvme_ctrl *ctrl);
767 void nvme_wait_freeze(struct nvme_ctrl *ctrl);
768 int nvme_wait_freeze_timeout(struct nvme_ctrl *ctrl, long timeout);
769 void nvme_start_freeze(struct nvme_ctrl *ctrl);
771 static inline enum req_op nvme_req_op(struct nvme_command *cmd)
773 return nvme_is_write(cmd) ? REQ_OP_DRV_OUT : REQ_OP_DRV_IN;
776 #define NVME_QID_ANY -1
777 void nvme_init_request(struct request *req, struct nvme_command *cmd);
778 void nvme_cleanup_cmd(struct request *req);
779 blk_status_t nvme_setup_cmd(struct nvme_ns *ns, struct request *req);
780 blk_status_t nvme_fail_nonready_command(struct nvme_ctrl *ctrl,
781 struct request *req);
782 bool __nvme_check_ready(struct nvme_ctrl *ctrl, struct request *rq,
785 static inline bool nvme_check_ready(struct nvme_ctrl *ctrl, struct request *rq,
788 if (likely(ctrl->state == NVME_CTRL_LIVE))
790 if (ctrl->ops->flags & NVME_F_FABRICS &&
791 ctrl->state == NVME_CTRL_DELETING)
793 return __nvme_check_ready(ctrl, rq, queue_live);
797 * NSID shall be unique for all shared namespaces, or if at least one of the
798 * following conditions is met:
799 * 1. Namespace Management is supported by the controller
800 * 2. ANA is supported by the controller
801 * 3. NVM Set are supported by the controller
803 * In other case, private namespace are not required to report a unique NSID.
805 static inline bool nvme_is_unique_nsid(struct nvme_ctrl *ctrl,
806 struct nvme_ns_head *head)
808 return head->shared ||
809 (ctrl->oacs & NVME_CTRL_OACS_NS_MNGT_SUPP) ||
810 (ctrl->subsys->cmic & NVME_CTRL_CMIC_ANA) ||
811 (ctrl->ctratt & NVME_CTRL_CTRATT_NVM_SETS);
814 int nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd,
815 void *buf, unsigned bufflen);
816 int __nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd,
817 union nvme_result *result, void *buffer, unsigned bufflen,
818 int qid, int at_head,
819 blk_mq_req_flags_t flags);
820 int nvme_set_features(struct nvme_ctrl *dev, unsigned int fid,
821 unsigned int dword11, void *buffer, size_t buflen,
823 int nvme_get_features(struct nvme_ctrl *dev, unsigned int fid,
824 unsigned int dword11, void *buffer, size_t buflen,
826 int nvme_set_queue_count(struct nvme_ctrl *ctrl, int *count);
827 void nvme_stop_keep_alive(struct nvme_ctrl *ctrl);
828 int nvme_reset_ctrl(struct nvme_ctrl *ctrl);
829 int nvme_reset_ctrl_sync(struct nvme_ctrl *ctrl);
830 int nvme_delete_ctrl(struct nvme_ctrl *ctrl);
831 void nvme_queue_scan(struct nvme_ctrl *ctrl);
832 int nvme_get_log(struct nvme_ctrl *ctrl, u32 nsid, u8 log_page, u8 lsp, u8 csi,
833 void *log, size_t size, u64 offset);
834 bool nvme_tryget_ns_head(struct nvme_ns_head *head);
835 void nvme_put_ns_head(struct nvme_ns_head *head);
836 int nvme_cdev_add(struct cdev *cdev, struct device *cdev_device,
837 const struct file_operations *fops, struct module *owner);
838 void nvme_cdev_del(struct cdev *cdev, struct device *cdev_device);
839 int nvme_ioctl(struct block_device *bdev, blk_mode_t mode,
840 unsigned int cmd, unsigned long arg);
841 long nvme_ns_chr_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
842 int nvme_ns_head_ioctl(struct block_device *bdev, blk_mode_t mode,
843 unsigned int cmd, unsigned long arg);
844 long nvme_ns_head_chr_ioctl(struct file *file, unsigned int cmd,
846 long nvme_dev_ioctl(struct file *file, unsigned int cmd,
848 int nvme_ns_chr_uring_cmd_iopoll(struct io_uring_cmd *ioucmd,
849 struct io_comp_batch *iob, unsigned int poll_flags);
850 int nvme_ns_head_chr_uring_cmd_iopoll(struct io_uring_cmd *ioucmd,
851 struct io_comp_batch *iob, unsigned int poll_flags);
852 int nvme_ns_chr_uring_cmd(struct io_uring_cmd *ioucmd,
853 unsigned int issue_flags);
854 int nvme_ns_head_chr_uring_cmd(struct io_uring_cmd *ioucmd,
855 unsigned int issue_flags);
856 int nvme_getgeo(struct block_device *bdev, struct hd_geometry *geo);
857 int nvme_dev_uring_cmd(struct io_uring_cmd *ioucmd, unsigned int issue_flags);
859 extern const struct attribute_group *nvme_ns_id_attr_groups[];
860 extern const struct pr_ops nvme_pr_ops;
861 extern const struct block_device_operations nvme_ns_head_ops;
862 extern const struct attribute_group nvme_dev_attrs_group;
864 struct nvme_ns *nvme_find_path(struct nvme_ns_head *head);
865 #ifdef CONFIG_NVME_MULTIPATH
866 static inline bool nvme_ctrl_use_ana(struct nvme_ctrl *ctrl)
868 return ctrl->ana_log_buf != NULL;
871 void nvme_mpath_unfreeze(struct nvme_subsystem *subsys);
872 void nvme_mpath_wait_freeze(struct nvme_subsystem *subsys);
873 void nvme_mpath_start_freeze(struct nvme_subsystem *subsys);
874 void nvme_mpath_default_iopolicy(struct nvme_subsystem *subsys);
875 void nvme_failover_req(struct request *req);
876 void nvme_kick_requeue_lists(struct nvme_ctrl *ctrl);
877 int nvme_mpath_alloc_disk(struct nvme_ctrl *ctrl,struct nvme_ns_head *head);
878 void nvme_mpath_add_disk(struct nvme_ns *ns, __le32 anagrpid);
879 void nvme_mpath_remove_disk(struct nvme_ns_head *head);
880 int nvme_mpath_init_identify(struct nvme_ctrl *ctrl, struct nvme_id_ctrl *id);
881 void nvme_mpath_init_ctrl(struct nvme_ctrl *ctrl);
882 void nvme_mpath_update(struct nvme_ctrl *ctrl);
883 void nvme_mpath_uninit(struct nvme_ctrl *ctrl);
884 void nvme_mpath_stop(struct nvme_ctrl *ctrl);
885 bool nvme_mpath_clear_current_path(struct nvme_ns *ns);
886 void nvme_mpath_revalidate_paths(struct nvme_ns *ns);
887 void nvme_mpath_clear_ctrl_paths(struct nvme_ctrl *ctrl);
888 void nvme_mpath_shutdown_disk(struct nvme_ns_head *head);
889 void nvme_mpath_start_request(struct request *rq);
890 void nvme_mpath_end_request(struct request *rq);
892 static inline void nvme_trace_bio_complete(struct request *req)
894 struct nvme_ns *ns = req->q->queuedata;
896 if ((req->cmd_flags & REQ_NVME_MPATH) && req->bio)
897 trace_block_bio_complete(ns->head->disk->queue, req->bio);
900 extern bool multipath;
901 extern struct device_attribute dev_attr_ana_grpid;
902 extern struct device_attribute dev_attr_ana_state;
903 extern struct device_attribute subsys_attr_iopolicy;
906 #define multipath false
907 static inline bool nvme_ctrl_use_ana(struct nvme_ctrl *ctrl)
911 static inline void nvme_failover_req(struct request *req)
914 static inline void nvme_kick_requeue_lists(struct nvme_ctrl *ctrl)
917 static inline int nvme_mpath_alloc_disk(struct nvme_ctrl *ctrl,
918 struct nvme_ns_head *head)
922 static inline void nvme_mpath_add_disk(struct nvme_ns *ns, __le32 anagrpid)
925 static inline void nvme_mpath_remove_disk(struct nvme_ns_head *head)
928 static inline bool nvme_mpath_clear_current_path(struct nvme_ns *ns)
932 static inline void nvme_mpath_revalidate_paths(struct nvme_ns *ns)
935 static inline void nvme_mpath_clear_ctrl_paths(struct nvme_ctrl *ctrl)
938 static inline void nvme_mpath_shutdown_disk(struct nvme_ns_head *head)
941 static inline void nvme_trace_bio_complete(struct request *req)
944 static inline void nvme_mpath_init_ctrl(struct nvme_ctrl *ctrl)
947 static inline int nvme_mpath_init_identify(struct nvme_ctrl *ctrl,
948 struct nvme_id_ctrl *id)
950 if (ctrl->subsys->cmic & NVME_CTRL_CMIC_ANA)
951 dev_warn(ctrl->device,
952 "Please enable CONFIG_NVME_MULTIPATH for full support of multi-port devices.\n");
955 static inline void nvme_mpath_update(struct nvme_ctrl *ctrl)
958 static inline void nvme_mpath_uninit(struct nvme_ctrl *ctrl)
961 static inline void nvme_mpath_stop(struct nvme_ctrl *ctrl)
964 static inline void nvme_mpath_unfreeze(struct nvme_subsystem *subsys)
967 static inline void nvme_mpath_wait_freeze(struct nvme_subsystem *subsys)
970 static inline void nvme_mpath_start_freeze(struct nvme_subsystem *subsys)
973 static inline void nvme_mpath_default_iopolicy(struct nvme_subsystem *subsys)
976 static inline void nvme_mpath_start_request(struct request *rq)
979 static inline void nvme_mpath_end_request(struct request *rq)
982 #endif /* CONFIG_NVME_MULTIPATH */
984 int nvme_revalidate_zones(struct nvme_ns *ns);
985 int nvme_ns_report_zones(struct nvme_ns *ns, sector_t sector,
986 unsigned int nr_zones, report_zones_cb cb, void *data);
987 #ifdef CONFIG_BLK_DEV_ZONED
988 int nvme_update_zone_info(struct nvme_ns *ns, unsigned lbaf);
989 blk_status_t nvme_setup_zone_mgmt_send(struct nvme_ns *ns, struct request *req,
990 struct nvme_command *cmnd,
991 enum nvme_zone_mgmt_action action);
993 static inline blk_status_t nvme_setup_zone_mgmt_send(struct nvme_ns *ns,
994 struct request *req, struct nvme_command *cmnd,
995 enum nvme_zone_mgmt_action action)
997 return BLK_STS_NOTSUPP;
1000 static inline int nvme_update_zone_info(struct nvme_ns *ns, unsigned lbaf)
1002 dev_warn(ns->ctrl->device,
1003 "Please enable CONFIG_BLK_DEV_ZONED to support ZNS devices\n");
1004 return -EPROTONOSUPPORT;
1008 static inline struct nvme_ns *nvme_get_ns_from_dev(struct device *dev)
1010 return dev_to_disk(dev)->private_data;
1013 #ifdef CONFIG_NVME_HWMON
1014 int nvme_hwmon_init(struct nvme_ctrl *ctrl);
1015 void nvme_hwmon_exit(struct nvme_ctrl *ctrl);
1017 static inline int nvme_hwmon_init(struct nvme_ctrl *ctrl)
1022 static inline void nvme_hwmon_exit(struct nvme_ctrl *ctrl)
1027 static inline void nvme_start_request(struct request *rq)
1029 if (rq->cmd_flags & REQ_NVME_MPATH)
1030 nvme_mpath_start_request(rq);
1031 blk_mq_start_request(rq);
1034 static inline bool nvme_ctrl_sgl_supported(struct nvme_ctrl *ctrl)
1036 return ctrl->sgls & ((1 << 0) | (1 << 1));
1039 #ifdef CONFIG_NVME_AUTH
1040 int __init nvme_init_auth(void);
1041 void __exit nvme_exit_auth(void);
1042 int nvme_auth_init_ctrl(struct nvme_ctrl *ctrl);
1043 void nvme_auth_stop(struct nvme_ctrl *ctrl);
1044 int nvme_auth_negotiate(struct nvme_ctrl *ctrl, int qid);
1045 int nvme_auth_wait(struct nvme_ctrl *ctrl, int qid);
1046 void nvme_auth_free(struct nvme_ctrl *ctrl);
1048 static inline int nvme_auth_init_ctrl(struct nvme_ctrl *ctrl)
1052 static inline int __init nvme_init_auth(void)
1056 static inline void __exit nvme_exit_auth(void)
1059 static inline void nvme_auth_stop(struct nvme_ctrl *ctrl) {};
1060 static inline int nvme_auth_negotiate(struct nvme_ctrl *ctrl, int qid)
1062 return -EPROTONOSUPPORT;
1064 static inline int nvme_auth_wait(struct nvme_ctrl *ctrl, int qid)
1066 return NVME_SC_AUTH_REQUIRED;
1068 static inline void nvme_auth_free(struct nvme_ctrl *ctrl) {};
1071 u32 nvme_command_effects(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
1073 u32 nvme_passthru_start(struct nvme_ctrl *ctrl, struct nvme_ns *ns, u8 opcode);
1074 int nvme_execute_rq(struct request *rq, bool at_head);
1075 void nvme_passthru_end(struct nvme_ctrl *ctrl, u32 effects,
1076 struct nvme_command *cmd, int status);
1077 struct nvme_ctrl *nvme_ctrl_from_file(struct file *file);
1078 struct nvme_ns *nvme_find_get_ns(struct nvme_ctrl *ctrl, unsigned nsid);
1079 void nvme_put_ns(struct nvme_ns *ns);
1081 static inline bool nvme_multi_css(struct nvme_ctrl *ctrl)
1083 return (ctrl->ctrl_config & NVME_CC_CSS_MASK) == NVME_CC_CSS_CSI;
1086 #ifdef CONFIG_NVME_VERBOSE_ERRORS
1087 const unsigned char *nvme_get_error_status_str(u16 status);
1088 const unsigned char *nvme_get_opcode_str(u8 opcode);
1089 const unsigned char *nvme_get_admin_opcode_str(u8 opcode);
1090 const unsigned char *nvme_get_fabrics_opcode_str(u8 opcode);
1091 #else /* CONFIG_NVME_VERBOSE_ERRORS */
1092 static inline const unsigned char *nvme_get_error_status_str(u16 status)
1096 static inline const unsigned char *nvme_get_opcode_str(u8 opcode)
1100 static inline const unsigned char *nvme_get_admin_opcode_str(u8 opcode)
1105 static inline const unsigned char *nvme_get_fabrics_opcode_str(u8 opcode)
1107 return "Fabrics Cmd";
1109 #endif /* CONFIG_NVME_VERBOSE_ERRORS */
1111 static inline const unsigned char *nvme_opcode_str(int qid, u8 opcode, u8 fctype)
1113 if (opcode == nvme_fabrics_command)
1114 return nvme_get_fabrics_opcode_str(fctype);
1115 return qid ? nvme_get_opcode_str(opcode) :
1116 nvme_get_admin_opcode_str(opcode);
1118 #endif /* _NVME_H */