1
2
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4
5
6#ifndef _NVME_H
7#define _NVME_H
8
9#include <linux/nvme.h>
10#include <linux/cdev.h>
11#include <linux/pci.h>
12#include <linux/kref.h>
13#include <linux/blk-mq.h>
14#include <linux/lightnvm.h>
15#include <linux/sed-opal.h>
16#include <linux/fault-inject.h>
17#include <linux/rcupdate.h>
18#include <linux/wait.h>
19#include <linux/t10-pi.h>
20
21#include <trace/events/block.h>
22
23extern unsigned int nvme_io_timeout;
24#define NVME_IO_TIMEOUT (nvme_io_timeout * HZ)
25
26extern unsigned int admin_timeout;
27#define NVME_ADMIN_TIMEOUT (admin_timeout * HZ)
28
29#define NVME_DEFAULT_KATO 5
30#define NVME_KATO_GRACE 10
31
32#ifdef CONFIG_ARCH_NO_SG_CHAIN
33#define NVME_INLINE_SG_CNT 0
34#define NVME_INLINE_METADATA_SG_CNT 0
35#else
36#define NVME_INLINE_SG_CNT 2
37#define NVME_INLINE_METADATA_SG_CNT 1
38#endif
39
40
41
42
43
44
45#define NVME_CTRL_PAGE_SHIFT 12
46#define NVME_CTRL_PAGE_SIZE (1 << NVME_CTRL_PAGE_SHIFT)
47
48extern struct workqueue_struct *nvme_wq;
49extern struct workqueue_struct *nvme_reset_wq;
50extern struct workqueue_struct *nvme_delete_wq;
51
52enum {
53 NVME_NS_LBA = 0,
54 NVME_NS_LIGHTNVM = 1,
55};
56
57
58
59
60
61enum nvme_quirks {
62
63
64
65
66 NVME_QUIRK_STRIPE_SIZE = (1 << 0),
67
68
69
70
71
72 NVME_QUIRK_IDENTIFY_CNS = (1 << 1),
73
74
75
76
77
78 NVME_QUIRK_DEALLOCATE_ZEROES = (1 << 2),
79
80
81
82
83
84 NVME_QUIRK_DELAY_BEFORE_CHK_RDY = (1 << 3),
85
86
87
88
89 NVME_QUIRK_NO_APST = (1 << 4),
90
91
92
93
94 NVME_QUIRK_NO_DEEPEST_PS = (1 << 5),
95
96
97
98
99 NVME_QUIRK_LIGHTNVM = (1 << 6),
100
101
102
103
104 NVME_QUIRK_MEDIUM_PRIO_SQ = (1 << 7),
105
106
107
108
109 NVME_QUIRK_IGNORE_DEV_SUBNQN = (1 << 8),
110
111
112
113
114 NVME_QUIRK_DISABLE_WRITE_ZEROES = (1 << 9),
115
116
117
118
119 NVME_QUIRK_SIMPLE_SUSPEND = (1 << 10),
120
121
122
123
124 NVME_QUIRK_SINGLE_VECTOR = (1 << 11),
125
126
127
128
129 NVME_QUIRK_128_BYTES_SQES = (1 << 12),
130
131
132
133
134 NVME_QUIRK_SHARED_TAGS = (1 << 13),
135
136
137
138
139 NVME_QUIRK_NO_TEMP_THRESH_CHANGE = (1 << 14),
140
141
142
143
144
145
146 NVME_QUIRK_NO_NS_DESC_LIST = (1 << 15),
147};
148
149
150
151
152
153struct nvme_request {
154 struct nvme_command *cmd;
155 union nvme_result result;
156 u8 retries;
157 u8 flags;
158 u16 status;
159 struct nvme_ctrl *ctrl;
160};
161
162
163
164
165#define REQ_NVME_MPATH REQ_DRV
166
167enum {
168 NVME_REQ_CANCELLED = (1 << 0),
169 NVME_REQ_USERCMD = (1 << 1),
170};
171
172static inline struct nvme_request *nvme_req(struct request *req)
173{
174 return blk_mq_rq_to_pdu(req);
175}
176
177static inline u16 nvme_req_qid(struct request *req)
178{
179 if (!req->q->queuedata)
180 return 0;
181
182 return req->mq_hctx->queue_num + 1;
183}
184
185
186
187
188
189
190#define NVME_QUIRK_DELAY_AMOUNT 2300
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211enum nvme_ctrl_state {
212 NVME_CTRL_NEW,
213 NVME_CTRL_LIVE,
214 NVME_CTRL_RESETTING,
215 NVME_CTRL_CONNECTING,
216 NVME_CTRL_DELETING,
217 NVME_CTRL_DELETING_NOIO,
218 NVME_CTRL_DEAD,
219};
220
221struct nvme_fault_inject {
222#ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
223 struct fault_attr attr;
224 struct dentry *parent;
225 bool dont_retry;
226 u16 status;
227#endif
228};
229
230struct nvme_ctrl {
231 bool comp_seen;
232 enum nvme_ctrl_state state;
233 bool identified;
234 spinlock_t lock;
235 struct mutex scan_lock;
236 const struct nvme_ctrl_ops *ops;
237 struct request_queue *admin_q;
238 struct request_queue *connect_q;
239 struct request_queue *fabrics_q;
240 struct device *dev;
241 int instance;
242 int numa_node;
243 struct blk_mq_tag_set *tagset;
244 struct blk_mq_tag_set *admin_tagset;
245 struct list_head namespaces;
246 struct rw_semaphore namespaces_rwsem;
247 struct device ctrl_device;
248 struct device *device;
249 struct cdev cdev;
250 struct work_struct reset_work;
251 struct work_struct delete_work;
252 wait_queue_head_t state_wq;
253
254 struct nvme_subsystem *subsys;
255 struct list_head subsys_entry;
256
257 struct opal_dev *opal_dev;
258
259 char name[12];
260 u16 cntlid;
261
262 u32 ctrl_config;
263 u16 mtfa;
264 u32 queue_count;
265
266 u64 cap;
267 u32 max_hw_sectors;
268 u32 max_segments;
269 u32 max_integrity_segments;
270#ifdef CONFIG_BLK_DEV_ZONED
271 u32 max_zone_append;
272#endif
273 u16 crdt[3];
274 u16 oncs;
275 u16 oacs;
276 u16 nssa;
277 u16 nr_streams;
278 u16 sqsize;
279 u32 max_namespaces;
280 atomic_t abort_limit;
281 u8 vwc;
282 u32 vs;
283 u32 sgls;
284 u16 kas;
285 u8 npss;
286 u8 apsta;
287 u16 wctemp;
288 u16 cctemp;
289 u32 oaes;
290 u32 aen_result;
291 u32 ctratt;
292 unsigned int shutdown_timeout;
293 unsigned int kato;
294 bool subsystem;
295 unsigned long quirks;
296 struct nvme_id_power_state psd[32];
297 struct nvme_effects_log *effects;
298 struct xarray cels;
299 struct work_struct scan_work;
300 struct work_struct async_event_work;
301 struct delayed_work ka_work;
302 struct delayed_work failfast_work;
303 struct nvme_command ka_cmd;
304 struct work_struct fw_act_work;
305 unsigned long events;
306
307#ifdef CONFIG_NVME_MULTIPATH
308
309 u8 anacap;
310 u8 anatt;
311 u32 anagrpmax;
312 u32 nanagrpid;
313 struct mutex ana_lock;
314 struct nvme_ana_rsp_hdr *ana_log_buf;
315 size_t ana_log_size;
316 struct timer_list anatt_timer;
317 struct work_struct ana_work;
318#endif
319
320
321 u64 ps_max_latency_us;
322 bool apst_enabled;
323
324
325 u32 hmpre;
326 u32 hmmin;
327 u32 hmminds;
328 u16 hmmaxd;
329
330
331 u32 ioccsz;
332 u32 iorcsz;
333 u16 icdoff;
334 u16 maxcmd;
335 int nr_reconnects;
336 unsigned long flags;
337#define NVME_CTRL_FAILFAST_EXPIRED 0
338 struct nvmf_ctrl_options *opts;
339
340 struct page *discard_page;
341 unsigned long discard_page_busy;
342
343 struct nvme_fault_inject fault_inject;
344};
345
346enum nvme_iopolicy {
347 NVME_IOPOLICY_NUMA,
348 NVME_IOPOLICY_RR,
349};
350
351struct nvme_subsystem {
352 int instance;
353 struct device dev;
354
355
356
357
358 struct kref ref;
359 struct list_head entry;
360 struct mutex lock;
361 struct list_head ctrls;
362 struct list_head nsheads;
363 char subnqn[NVMF_NQN_SIZE];
364 char serial[20];
365 char model[40];
366 char firmware_rev[8];
367 u8 cmic;
368 u16 vendor_id;
369 u16 awupf;
370 struct ida ns_ida;
371#ifdef CONFIG_NVME_MULTIPATH
372 enum nvme_iopolicy iopolicy;
373#endif
374};
375
376
377
378
379struct nvme_ns_ids {
380 u8 eui64[8];
381 u8 nguid[16];
382 uuid_t uuid;
383 u8 csi;
384};
385
386
387
388
389
390
391
392
393struct nvme_ns_head {
394 struct list_head list;
395 struct srcu_struct srcu;
396 struct nvme_subsystem *subsys;
397 unsigned ns_id;
398 struct nvme_ns_ids ids;
399 struct list_head entry;
400 struct kref ref;
401 bool shared;
402 int instance;
403 struct nvme_effects_log *effects;
404#ifdef CONFIG_NVME_MULTIPATH
405 struct gendisk *disk;
406 struct bio_list requeue_list;
407 spinlock_t requeue_lock;
408 struct work_struct requeue_work;
409 struct mutex lock;
410 unsigned long flags;
411#define NVME_NSHEAD_DISK_LIVE 0
412 struct nvme_ns __rcu *current_path[];
413#endif
414};
415
416enum nvme_ns_features {
417 NVME_NS_EXT_LBAS = 1 << 0,
418 NVME_NS_METADATA_SUPPORTED = 1 << 1,
419};
420
421struct nvme_ns {
422 struct list_head list;
423
424 struct nvme_ctrl *ctrl;
425 struct request_queue *queue;
426 struct gendisk *disk;
427#ifdef CONFIG_NVME_MULTIPATH
428 enum nvme_ana_state ana_state;
429 u32 ana_grpid;
430#endif
431 struct list_head siblings;
432 struct nvm_dev *ndev;
433 struct kref kref;
434 struct nvme_ns_head *head;
435
436 int lba_shift;
437 u16 ms;
438 u16 sgs;
439 u32 sws;
440 u8 pi_type;
441#ifdef CONFIG_BLK_DEV_ZONED
442 u64 zsze;
443#endif
444 unsigned long features;
445 unsigned long flags;
446#define NVME_NS_REMOVING 0
447#define NVME_NS_DEAD 1
448#define NVME_NS_ANA_PENDING 2
449#define NVME_NS_FORCE_RO 3
450
451 struct nvme_fault_inject fault_inject;
452
453};
454
455
456static inline bool nvme_ns_has_pi(struct nvme_ns *ns)
457{
458 return ns->pi_type && ns->ms == sizeof(struct t10_pi_tuple);
459}
460
461struct nvme_ctrl_ops {
462 const char *name;
463 struct module *module;
464 unsigned int flags;
465#define NVME_F_FABRICS (1 << 0)
466#define NVME_F_METADATA_SUPPORTED (1 << 1)
467#define NVME_F_PCI_P2PDMA (1 << 2)
468 int (*reg_read32)(struct nvme_ctrl *ctrl, u32 off, u32 *val);
469 int (*reg_write32)(struct nvme_ctrl *ctrl, u32 off, u32 val);
470 int (*reg_read64)(struct nvme_ctrl *ctrl, u32 off, u64 *val);
471 void (*free_ctrl)(struct nvme_ctrl *ctrl);
472 void (*submit_async_event)(struct nvme_ctrl *ctrl);
473 void (*delete_ctrl)(struct nvme_ctrl *ctrl);
474 int (*get_address)(struct nvme_ctrl *ctrl, char *buf, int size);
475};
476
477#ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
478void nvme_fault_inject_init(struct nvme_fault_inject *fault_inj,
479 const char *dev_name);
480void nvme_fault_inject_fini(struct nvme_fault_inject *fault_inject);
481void nvme_should_fail(struct request *req);
482#else
483static inline void nvme_fault_inject_init(struct nvme_fault_inject *fault_inj,
484 const char *dev_name)
485{
486}
487static inline void nvme_fault_inject_fini(struct nvme_fault_inject *fault_inj)
488{
489}
490static inline void nvme_should_fail(struct request *req) {}
491#endif
492
493static inline int nvme_reset_subsystem(struct nvme_ctrl *ctrl)
494{
495 if (!ctrl->subsystem)
496 return -ENOTTY;
497 return ctrl->ops->reg_write32(ctrl, NVME_REG_NSSR, 0x4E564D65);
498}
499
500
501
502
503static inline u64 nvme_sect_to_lba(struct nvme_ns *ns, sector_t sector)
504{
505 return sector >> (ns->lba_shift - SECTOR_SHIFT);
506}
507
508
509
510
511static inline sector_t nvme_lba_to_sect(struct nvme_ns *ns, u64 lba)
512{
513 return lba << (ns->lba_shift - SECTOR_SHIFT);
514}
515
516
517
518
519static inline u32 nvme_bytes_to_numd(size_t len)
520{
521 return (len >> 2) - 1;
522}
523
524static inline bool nvme_is_ana_error(u16 status)
525{
526 switch (status & 0x7ff) {
527 case NVME_SC_ANA_TRANSITION:
528 case NVME_SC_ANA_INACCESSIBLE:
529 case NVME_SC_ANA_PERSISTENT_LOSS:
530 return true;
531 default:
532 return false;
533 }
534}
535
536static inline bool nvme_is_path_error(u16 status)
537{
538
539 return (status & 0x700) == 0x300;
540}
541
542
543
544
545
546
547
548static inline bool nvme_try_complete_req(struct request *req, __le16 status,
549 union nvme_result result)
550{
551 struct nvme_request *rq = nvme_req(req);
552
553 rq->status = le16_to_cpu(status) >> 1;
554 rq->result = result;
555
556 nvme_should_fail(req);
557 if (unlikely(blk_should_fake_timeout(req->q)))
558 return true;
559 return blk_mq_complete_request_remote(req);
560}
561
562static inline void nvme_get_ctrl(struct nvme_ctrl *ctrl)
563{
564 get_device(ctrl->device);
565}
566
567static inline void nvme_put_ctrl(struct nvme_ctrl *ctrl)
568{
569 put_device(ctrl->device);
570}
571
572static inline bool nvme_is_aen_req(u16 qid, __u16 command_id)
573{
574 return !qid && command_id >= NVME_AQ_BLK_MQ_DEPTH;
575}
576
577void nvme_complete_rq(struct request *req);
578bool nvme_cancel_request(struct request *req, void *data, bool reserved);
579bool nvme_change_ctrl_state(struct nvme_ctrl *ctrl,
580 enum nvme_ctrl_state new_state);
581bool nvme_wait_reset(struct nvme_ctrl *ctrl);
582int nvme_disable_ctrl(struct nvme_ctrl *ctrl);
583int nvme_enable_ctrl(struct nvme_ctrl *ctrl);
584int nvme_shutdown_ctrl(struct nvme_ctrl *ctrl);
585int nvme_init_ctrl(struct nvme_ctrl *ctrl, struct device *dev,
586 const struct nvme_ctrl_ops *ops, unsigned long quirks);
587void nvme_uninit_ctrl(struct nvme_ctrl *ctrl);
588void nvme_start_ctrl(struct nvme_ctrl *ctrl);
589void nvme_stop_ctrl(struct nvme_ctrl *ctrl);
590int nvme_init_identify(struct nvme_ctrl *ctrl);
591
592void nvme_remove_namespaces(struct nvme_ctrl *ctrl);
593
594int nvme_sec_submit(void *data, u16 spsp, u8 secp, void *buffer, size_t len,
595 bool send);
596
597void nvme_complete_async_event(struct nvme_ctrl *ctrl, __le16 status,
598 volatile union nvme_result *res);
599
600void nvme_stop_queues(struct nvme_ctrl *ctrl);
601void nvme_start_queues(struct nvme_ctrl *ctrl);
602void nvme_kill_queues(struct nvme_ctrl *ctrl);
603void nvme_sync_queues(struct nvme_ctrl *ctrl);
604void nvme_sync_io_queues(struct nvme_ctrl *ctrl);
605void nvme_unfreeze(struct nvme_ctrl *ctrl);
606void nvme_wait_freeze(struct nvme_ctrl *ctrl);
607int nvme_wait_freeze_timeout(struct nvme_ctrl *ctrl, long timeout);
608void nvme_start_freeze(struct nvme_ctrl *ctrl);
609
610#define NVME_QID_ANY -1
611struct request *nvme_alloc_request(struct request_queue *q,
612 struct nvme_command *cmd, blk_mq_req_flags_t flags);
613void nvme_cleanup_cmd(struct request *req);
614blk_status_t nvme_setup_cmd(struct nvme_ns *ns, struct request *req,
615 struct nvme_command *cmd);
616int nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd,
617 void *buf, unsigned bufflen);
618int __nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd,
619 union nvme_result *result, void *buffer, unsigned bufflen,
620 unsigned timeout, int qid, int at_head,
621 blk_mq_req_flags_t flags, bool poll);
622int nvme_set_features(struct nvme_ctrl *dev, unsigned int fid,
623 unsigned int dword11, void *buffer, size_t buflen,
624 u32 *result);
625int nvme_get_features(struct nvme_ctrl *dev, unsigned int fid,
626 unsigned int dword11, void *buffer, size_t buflen,
627 u32 *result);
628int nvme_set_queue_count(struct nvme_ctrl *ctrl, int *count);
629void nvme_stop_keep_alive(struct nvme_ctrl *ctrl);
630int nvme_reset_ctrl(struct nvme_ctrl *ctrl);
631int nvme_try_sched_reset(struct nvme_ctrl *ctrl);
632int nvme_delete_ctrl(struct nvme_ctrl *ctrl);
633
634int nvme_get_log(struct nvme_ctrl *ctrl, u32 nsid, u8 log_page, u8 lsp, u8 csi,
635 void *log, size_t size, u64 offset);
636struct nvme_ns *nvme_get_ns_from_disk(struct gendisk *disk,
637 struct nvme_ns_head **head, int *srcu_idx);
638void nvme_put_ns_from_disk(struct nvme_ns_head *head, int idx);
639
640extern const struct attribute_group *nvme_ns_id_attr_groups[];
641extern const struct block_device_operations nvme_ns_head_ops;
642
643#ifdef CONFIG_NVME_MULTIPATH
644static inline bool nvme_ctrl_use_ana(struct nvme_ctrl *ctrl)
645{
646 return ctrl->ana_log_buf != NULL;
647}
648
649void nvme_mpath_unfreeze(struct nvme_subsystem *subsys);
650void nvme_mpath_wait_freeze(struct nvme_subsystem *subsys);
651void nvme_mpath_start_freeze(struct nvme_subsystem *subsys);
652void nvme_set_disk_name(char *disk_name, struct nvme_ns *ns,
653 struct nvme_ctrl *ctrl, int *flags);
654void nvme_failover_req(struct request *req);
655void nvme_kick_requeue_lists(struct nvme_ctrl *ctrl);
656int nvme_mpath_alloc_disk(struct nvme_ctrl *ctrl,struct nvme_ns_head *head);
657void nvme_mpath_add_disk(struct nvme_ns *ns, struct nvme_id_ns *id);
658void nvme_mpath_remove_disk(struct nvme_ns_head *head);
659int nvme_mpath_init(struct nvme_ctrl *ctrl, struct nvme_id_ctrl *id);
660void nvme_mpath_uninit(struct nvme_ctrl *ctrl);
661void nvme_mpath_stop(struct nvme_ctrl *ctrl);
662bool nvme_mpath_clear_current_path(struct nvme_ns *ns);
663void nvme_mpath_clear_ctrl_paths(struct nvme_ctrl *ctrl);
664struct nvme_ns *nvme_find_path(struct nvme_ns_head *head);
665blk_qc_t nvme_ns_head_submit_bio(struct bio *bio);
666
667static inline void nvme_mpath_check_last_path(struct nvme_ns *ns)
668{
669 struct nvme_ns_head *head = ns->head;
670
671 if (head->disk && list_empty(&head->list))
672 kblockd_schedule_work(&head->requeue_work);
673}
674
675static inline void nvme_trace_bio_complete(struct request *req)
676{
677 struct nvme_ns *ns = req->q->queuedata;
678
679 if (req->cmd_flags & REQ_NVME_MPATH)
680 trace_block_bio_complete(ns->head->disk->queue, req->bio);
681}
682
683extern struct device_attribute dev_attr_ana_grpid;
684extern struct device_attribute dev_attr_ana_state;
685extern struct device_attribute subsys_attr_iopolicy;
686
687#else
688static inline bool nvme_ctrl_use_ana(struct nvme_ctrl *ctrl)
689{
690 return false;
691}
692
693
694
695
696static inline void nvme_set_disk_name(char *disk_name, struct nvme_ns *ns,
697 struct nvme_ctrl *ctrl, int *flags)
698{
699 sprintf(disk_name, "nvme%dn%d", ctrl->instance, ns->head->instance);
700}
701
702static inline void nvme_failover_req(struct request *req)
703{
704}
705static inline void nvme_kick_requeue_lists(struct nvme_ctrl *ctrl)
706{
707}
708static inline int nvme_mpath_alloc_disk(struct nvme_ctrl *ctrl,
709 struct nvme_ns_head *head)
710{
711 return 0;
712}
713static inline void nvme_mpath_add_disk(struct nvme_ns *ns,
714 struct nvme_id_ns *id)
715{
716}
717static inline void nvme_mpath_remove_disk(struct nvme_ns_head *head)
718{
719}
720static inline bool nvme_mpath_clear_current_path(struct nvme_ns *ns)
721{
722 return false;
723}
724static inline void nvme_mpath_clear_ctrl_paths(struct nvme_ctrl *ctrl)
725{
726}
727static inline void nvme_mpath_check_last_path(struct nvme_ns *ns)
728{
729}
730static inline void nvme_trace_bio_complete(struct request *req)
731{
732}
733static inline int nvme_mpath_init(struct nvme_ctrl *ctrl,
734 struct nvme_id_ctrl *id)
735{
736 if (ctrl->subsys->cmic & (1 << 3))
737 dev_warn(ctrl->device,
738"Please enable CONFIG_NVME_MULTIPATH for full support of multi-port devices.\n");
739 return 0;
740}
741static inline void nvme_mpath_uninit(struct nvme_ctrl *ctrl)
742{
743}
744static inline void nvme_mpath_stop(struct nvme_ctrl *ctrl)
745{
746}
747static inline void nvme_mpath_unfreeze(struct nvme_subsystem *subsys)
748{
749}
750static inline void nvme_mpath_wait_freeze(struct nvme_subsystem *subsys)
751{
752}
753static inline void nvme_mpath_start_freeze(struct nvme_subsystem *subsys)
754{
755}
756#endif
757
758int nvme_revalidate_zones(struct nvme_ns *ns);
759#ifdef CONFIG_BLK_DEV_ZONED
760int nvme_update_zone_info(struct nvme_ns *ns, unsigned lbaf);
761int nvme_report_zones(struct gendisk *disk, sector_t sector,
762 unsigned int nr_zones, report_zones_cb cb, void *data);
763
764blk_status_t nvme_setup_zone_mgmt_send(struct nvme_ns *ns, struct request *req,
765 struct nvme_command *cmnd,
766 enum nvme_zone_mgmt_action action);
767#else
768#define nvme_report_zones NULL
769
770static inline blk_status_t nvme_setup_zone_mgmt_send(struct nvme_ns *ns,
771 struct request *req, struct nvme_command *cmnd,
772 enum nvme_zone_mgmt_action action)
773{
774 return BLK_STS_NOTSUPP;
775}
776
777static inline int nvme_update_zone_info(struct nvme_ns *ns, unsigned lbaf)
778{
779 dev_warn(ns->ctrl->device,
780 "Please enable CONFIG_BLK_DEV_ZONED to support ZNS devices\n");
781 return -EPROTONOSUPPORT;
782}
783#endif
784
785#ifdef CONFIG_NVM
786int nvme_nvm_register(struct nvme_ns *ns, char *disk_name, int node);
787void nvme_nvm_unregister(struct nvme_ns *ns);
788extern const struct attribute_group nvme_nvm_attr_group;
789int nvme_nvm_ioctl(struct nvme_ns *ns, unsigned int cmd, unsigned long arg);
790#else
791static inline int nvme_nvm_register(struct nvme_ns *ns, char *disk_name,
792 int node)
793{
794 return 0;
795}
796
797static inline void nvme_nvm_unregister(struct nvme_ns *ns) {};
798static inline int nvme_nvm_ioctl(struct nvme_ns *ns, unsigned int cmd,
799 unsigned long arg)
800{
801 return -ENOTTY;
802}
803#endif
804
805static inline struct nvme_ns *nvme_get_ns_from_dev(struct device *dev)
806{
807 return dev_to_disk(dev)->private_data;
808}
809
810#ifdef CONFIG_NVME_HWMON
811int nvme_hwmon_init(struct nvme_ctrl *ctrl);
812#else
813static inline int nvme_hwmon_init(struct nvme_ctrl *ctrl)
814{
815 return 0;
816}
817#endif
818
819u32 nvme_command_effects(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
820 u8 opcode);
821void nvme_execute_passthru_rq(struct request *rq);
822struct nvme_ctrl *nvme_ctrl_from_file(struct file *file);
823struct nvme_ns *nvme_find_get_ns(struct nvme_ctrl *ctrl, unsigned nsid);
824void nvme_put_ns(struct nvme_ns *ns);
825
826#endif
827