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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
19extern unsigned int nvme_io_timeout;
20#define NVME_IO_TIMEOUT (nvme_io_timeout * HZ)
21
22extern unsigned int admin_timeout;
23#define ADMIN_TIMEOUT (admin_timeout * HZ)
24
25#define NVME_DEFAULT_KATO 5
26#define NVME_KATO_GRACE 10
27
28extern struct workqueue_struct *nvme_wq;
29extern struct workqueue_struct *nvme_reset_wq;
30extern struct workqueue_struct *nvme_delete_wq;
31
32enum {
33 NVME_NS_LBA = 0,
34 NVME_NS_LIGHTNVM = 1,
35};
36
37
38
39
40
41enum nvme_quirks {
42
43
44
45
46 NVME_QUIRK_STRIPE_SIZE = (1 << 0),
47
48
49
50
51
52 NVME_QUIRK_IDENTIFY_CNS = (1 << 1),
53
54
55
56
57
58 NVME_QUIRK_DEALLOCATE_ZEROES = (1 << 2),
59
60
61
62
63
64 NVME_QUIRK_DELAY_BEFORE_CHK_RDY = (1 << 3),
65
66
67
68
69 NVME_QUIRK_NO_APST = (1 << 4),
70
71
72
73
74 NVME_QUIRK_NO_DEEPEST_PS = (1 << 5),
75
76
77
78
79 NVME_QUIRK_LIGHTNVM = (1 << 6),
80
81
82
83
84 NVME_QUIRK_MEDIUM_PRIO_SQ = (1 << 7),
85
86
87
88
89 NVME_QUIRK_IGNORE_DEV_SUBNQN = (1 << 8),
90
91
92
93
94 NVME_QUIRK_DISABLE_WRITE_ZEROES = (1 << 9),
95
96
97
98
99 NVME_QUIRK_SIMPLE_SUSPEND = (1 << 10),
100};
101
102
103
104
105
106struct nvme_request {
107 struct nvme_command *cmd;
108 union nvme_result result;
109 u8 retries;
110 u8 flags;
111 u16 status;
112 struct nvme_ctrl *ctrl;
113};
114
115
116
117
118#define REQ_NVME_MPATH REQ_DRV
119
120enum {
121 NVME_REQ_CANCELLED = (1 << 0),
122 NVME_REQ_USERCMD = (1 << 1),
123};
124
125static inline struct nvme_request *nvme_req(struct request *req)
126{
127 return blk_mq_rq_to_pdu(req);
128}
129
130static inline u16 nvme_req_qid(struct request *req)
131{
132 if (!req->rq_disk)
133 return 0;
134 return blk_mq_unique_tag_to_hwq(blk_mq_unique_tag(req)) + 1;
135}
136
137
138
139
140
141
142#define NVME_QUIRK_DELAY_AMOUNT 2300
143
144enum nvme_ctrl_state {
145 NVME_CTRL_NEW,
146 NVME_CTRL_LIVE,
147 NVME_CTRL_ADMIN_ONLY,
148 NVME_CTRL_RESETTING,
149 NVME_CTRL_CONNECTING,
150 NVME_CTRL_DELETING,
151 NVME_CTRL_DEAD,
152};
153
154struct nvme_fault_inject {
155#ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
156 struct fault_attr attr;
157 struct dentry *parent;
158 bool dont_retry;
159 u16 status;
160#endif
161};
162
163struct nvme_ctrl {
164 bool comp_seen;
165 enum nvme_ctrl_state state;
166 bool identified;
167 spinlock_t lock;
168 struct mutex scan_lock;
169 const struct nvme_ctrl_ops *ops;
170 struct request_queue *admin_q;
171 struct request_queue *connect_q;
172 struct device *dev;
173 int instance;
174 int numa_node;
175 struct blk_mq_tag_set *tagset;
176 struct blk_mq_tag_set *admin_tagset;
177 struct list_head namespaces;
178 struct rw_semaphore namespaces_rwsem;
179 struct device ctrl_device;
180 struct device *device;
181 struct cdev cdev;
182 struct work_struct reset_work;
183 struct work_struct delete_work;
184
185 struct nvme_subsystem *subsys;
186 struct list_head subsys_entry;
187
188 struct opal_dev *opal_dev;
189
190 char name[12];
191 u16 cntlid;
192
193 u32 ctrl_config;
194 u16 mtfa;
195 u32 queue_count;
196
197 u64 cap;
198 u32 page_size;
199 u32 max_hw_sectors;
200 u32 max_segments;
201 u16 crdt[3];
202 u16 oncs;
203 u16 oacs;
204 u16 nssa;
205 u16 nr_streams;
206 u32 max_namespaces;
207 atomic_t abort_limit;
208 u8 vwc;
209 u32 vs;
210 u32 sgls;
211 u16 kas;
212 u8 npss;
213 u8 apsta;
214 u32 oaes;
215 u32 aen_result;
216 u32 ctratt;
217 unsigned int shutdown_timeout;
218 unsigned int kato;
219 bool subsystem;
220 unsigned long quirks;
221 struct nvme_id_power_state psd[32];
222 struct nvme_effects_log *effects;
223 struct work_struct scan_work;
224 struct work_struct async_event_work;
225 struct delayed_work ka_work;
226 struct nvme_command ka_cmd;
227 struct work_struct fw_act_work;
228 unsigned long events;
229
230#ifdef CONFIG_NVME_MULTIPATH
231
232 u8 anacap;
233 u8 anatt;
234 u32 anagrpmax;
235 u32 nanagrpid;
236 struct mutex ana_lock;
237 struct nvme_ana_rsp_hdr *ana_log_buf;
238 size_t ana_log_size;
239 struct timer_list anatt_timer;
240 struct work_struct ana_work;
241#endif
242
243
244 u64 ps_max_latency_us;
245 bool apst_enabled;
246
247
248 u32 hmpre;
249 u32 hmmin;
250 u32 hmminds;
251 u16 hmmaxd;
252
253
254 u16 sqsize;
255 u32 ioccsz;
256 u32 iorcsz;
257 u16 icdoff;
258 u16 maxcmd;
259 int nr_reconnects;
260 struct nvmf_ctrl_options *opts;
261
262 struct page *discard_page;
263 unsigned long discard_page_busy;
264
265 struct nvme_fault_inject fault_inject;
266};
267
268enum nvme_iopolicy {
269 NVME_IOPOLICY_NUMA,
270 NVME_IOPOLICY_RR,
271};
272
273struct nvme_subsystem {
274 int instance;
275 struct device dev;
276
277
278
279
280 struct kref ref;
281 struct list_head entry;
282 struct mutex lock;
283 struct list_head ctrls;
284 struct list_head nsheads;
285 char subnqn[NVMF_NQN_SIZE];
286 char serial[20];
287 char model[40];
288 char firmware_rev[8];
289 u8 cmic;
290 u16 vendor_id;
291 u16 awupf;
292 struct ida ns_ida;
293#ifdef CONFIG_NVME_MULTIPATH
294 enum nvme_iopolicy iopolicy;
295#endif
296};
297
298
299
300
301struct nvme_ns_ids {
302 u8 eui64[8];
303 u8 nguid[16];
304 uuid_t uuid;
305};
306
307
308
309
310
311
312
313
314struct nvme_ns_head {
315 struct list_head list;
316 struct srcu_struct srcu;
317 struct nvme_subsystem *subsys;
318 unsigned ns_id;
319 struct nvme_ns_ids ids;
320 struct list_head entry;
321 struct kref ref;
322 int instance;
323#ifdef CONFIG_NVME_MULTIPATH
324 struct gendisk *disk;
325 struct bio_list requeue_list;
326 spinlock_t requeue_lock;
327 struct work_struct requeue_work;
328 struct mutex lock;
329 struct nvme_ns __rcu *current_path[];
330#endif
331};
332
333struct nvme_ns {
334 struct list_head list;
335
336 struct nvme_ctrl *ctrl;
337 struct request_queue *queue;
338 struct gendisk *disk;
339#ifdef CONFIG_NVME_MULTIPATH
340 enum nvme_ana_state ana_state;
341 u32 ana_grpid;
342#endif
343 struct list_head siblings;
344 struct nvm_dev *ndev;
345 struct kref kref;
346 struct nvme_ns_head *head;
347
348 int lba_shift;
349 u16 ms;
350 u16 sgs;
351 u32 sws;
352 bool ext;
353 u8 pi_type;
354 unsigned long flags;
355#define NVME_NS_REMOVING 0
356#define NVME_NS_DEAD 1
357#define NVME_NS_ANA_PENDING 2
358 u16 noiob;
359
360 struct nvme_fault_inject fault_inject;
361
362};
363
364struct nvme_ctrl_ops {
365 const char *name;
366 struct module *module;
367 unsigned int flags;
368#define NVME_F_FABRICS (1 << 0)
369#define NVME_F_METADATA_SUPPORTED (1 << 1)
370#define NVME_F_PCI_P2PDMA (1 << 2)
371 int (*reg_read32)(struct nvme_ctrl *ctrl, u32 off, u32 *val);
372 int (*reg_write32)(struct nvme_ctrl *ctrl, u32 off, u32 val);
373 int (*reg_read64)(struct nvme_ctrl *ctrl, u32 off, u64 *val);
374 void (*free_ctrl)(struct nvme_ctrl *ctrl);
375 void (*submit_async_event)(struct nvme_ctrl *ctrl);
376 void (*delete_ctrl)(struct nvme_ctrl *ctrl);
377 int (*get_address)(struct nvme_ctrl *ctrl, char *buf, int size);
378};
379
380#ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
381void nvme_fault_inject_init(struct nvme_fault_inject *fault_inj,
382 const char *dev_name);
383void nvme_fault_inject_fini(struct nvme_fault_inject *fault_inject);
384void nvme_should_fail(struct request *req);
385#else
386static inline void nvme_fault_inject_init(struct nvme_fault_inject *fault_inj,
387 const char *dev_name)
388{
389}
390static inline void nvme_fault_inject_fini(struct nvme_fault_inject *fault_inj)
391{
392}
393static inline void nvme_should_fail(struct request *req) {}
394#endif
395
396static inline int nvme_reset_subsystem(struct nvme_ctrl *ctrl)
397{
398 if (!ctrl->subsystem)
399 return -ENOTTY;
400 return ctrl->ops->reg_write32(ctrl, NVME_REG_NSSR, 0x4E564D65);
401}
402
403static inline u64 nvme_block_nr(struct nvme_ns *ns, sector_t sector)
404{
405 return (sector >> (ns->lba_shift - 9));
406}
407
408static inline void nvme_end_request(struct request *req, __le16 status,
409 union nvme_result result)
410{
411 struct nvme_request *rq = nvme_req(req);
412
413 rq->status = le16_to_cpu(status) >> 1;
414 rq->result = result;
415
416 nvme_should_fail(req);
417 blk_mq_complete_request(req);
418}
419
420static inline void nvme_get_ctrl(struct nvme_ctrl *ctrl)
421{
422 get_device(ctrl->device);
423}
424
425static inline void nvme_put_ctrl(struct nvme_ctrl *ctrl)
426{
427 put_device(ctrl->device);
428}
429
430void nvme_complete_rq(struct request *req);
431bool nvme_cancel_request(struct request *req, void *data, bool reserved);
432bool nvme_change_ctrl_state(struct nvme_ctrl *ctrl,
433 enum nvme_ctrl_state new_state);
434int nvme_disable_ctrl(struct nvme_ctrl *ctrl, u64 cap);
435int nvme_enable_ctrl(struct nvme_ctrl *ctrl, u64 cap);
436int nvme_shutdown_ctrl(struct nvme_ctrl *ctrl);
437int nvme_init_ctrl(struct nvme_ctrl *ctrl, struct device *dev,
438 const struct nvme_ctrl_ops *ops, unsigned long quirks);
439void nvme_uninit_ctrl(struct nvme_ctrl *ctrl);
440void nvme_start_ctrl(struct nvme_ctrl *ctrl);
441void nvme_stop_ctrl(struct nvme_ctrl *ctrl);
442void nvme_put_ctrl(struct nvme_ctrl *ctrl);
443int nvme_init_identify(struct nvme_ctrl *ctrl);
444
445void nvme_remove_namespaces(struct nvme_ctrl *ctrl);
446
447int nvme_sec_submit(void *data, u16 spsp, u8 secp, void *buffer, size_t len,
448 bool send);
449
450void nvme_complete_async_event(struct nvme_ctrl *ctrl, __le16 status,
451 volatile union nvme_result *res);
452
453void nvme_stop_queues(struct nvme_ctrl *ctrl);
454void nvme_start_queues(struct nvme_ctrl *ctrl);
455void nvme_kill_queues(struct nvme_ctrl *ctrl);
456void nvme_sync_queues(struct nvme_ctrl *ctrl);
457void nvme_unfreeze(struct nvme_ctrl *ctrl);
458void nvme_wait_freeze(struct nvme_ctrl *ctrl);
459void nvme_wait_freeze_timeout(struct nvme_ctrl *ctrl, long timeout);
460void nvme_start_freeze(struct nvme_ctrl *ctrl);
461
462#define NVME_QID_ANY -1
463struct request *nvme_alloc_request(struct request_queue *q,
464 struct nvme_command *cmd, blk_mq_req_flags_t flags, int qid);
465void nvme_cleanup_cmd(struct request *req);
466blk_status_t nvme_setup_cmd(struct nvme_ns *ns, struct request *req,
467 struct nvme_command *cmd);
468int nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd,
469 void *buf, unsigned bufflen);
470int __nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd,
471 union nvme_result *result, void *buffer, unsigned bufflen,
472 unsigned timeout, int qid, int at_head,
473 blk_mq_req_flags_t flags, bool poll);
474int nvme_set_features(struct nvme_ctrl *dev, unsigned int fid,
475 unsigned int dword11, void *buffer, size_t buflen,
476 u32 *result);
477int nvme_get_features(struct nvme_ctrl *dev, unsigned int fid,
478 unsigned int dword11, void *buffer, size_t buflen,
479 u32 *result);
480int nvme_set_queue_count(struct nvme_ctrl *ctrl, int *count);
481void nvme_stop_keep_alive(struct nvme_ctrl *ctrl);
482int nvme_reset_ctrl(struct nvme_ctrl *ctrl);
483int nvme_reset_ctrl_sync(struct nvme_ctrl *ctrl);
484int nvme_delete_ctrl(struct nvme_ctrl *ctrl);
485
486int nvme_get_log(struct nvme_ctrl *ctrl, u32 nsid, u8 log_page, u8 lsp,
487 void *log, size_t size, u64 offset);
488
489extern const struct attribute_group *nvme_ns_id_attr_groups[];
490extern const struct block_device_operations nvme_ns_head_ops;
491
492#ifdef CONFIG_NVME_MULTIPATH
493static inline bool nvme_ctrl_use_ana(struct nvme_ctrl *ctrl)
494{
495 return ctrl->ana_log_buf != NULL;
496}
497
498void nvme_mpath_unfreeze(struct nvme_subsystem *subsys);
499void nvme_mpath_wait_freeze(struct nvme_subsystem *subsys);
500void nvme_mpath_start_freeze(struct nvme_subsystem *subsys);
501void nvme_set_disk_name(char *disk_name, struct nvme_ns *ns,
502 struct nvme_ctrl *ctrl, int *flags);
503void nvme_failover_req(struct request *req);
504void nvme_kick_requeue_lists(struct nvme_ctrl *ctrl);
505int nvme_mpath_alloc_disk(struct nvme_ctrl *ctrl,struct nvme_ns_head *head);
506void nvme_mpath_add_disk(struct nvme_ns *ns, struct nvme_id_ns *id);
507void nvme_mpath_remove_disk(struct nvme_ns_head *head);
508int nvme_mpath_init(struct nvme_ctrl *ctrl, struct nvme_id_ctrl *id);
509void nvme_mpath_uninit(struct nvme_ctrl *ctrl);
510void nvme_mpath_stop(struct nvme_ctrl *ctrl);
511bool nvme_mpath_clear_current_path(struct nvme_ns *ns);
512void nvme_mpath_clear_ctrl_paths(struct nvme_ctrl *ctrl);
513struct nvme_ns *nvme_find_path(struct nvme_ns_head *head);
514
515static inline void nvme_mpath_check_last_path(struct nvme_ns *ns)
516{
517 struct nvme_ns_head *head = ns->head;
518
519 if (head->disk && list_empty(&head->list))
520 kblockd_schedule_work(&head->requeue_work);
521}
522
523extern struct device_attribute dev_attr_ana_grpid;
524extern struct device_attribute dev_attr_ana_state;
525extern struct device_attribute subsys_attr_iopolicy;
526
527#else
528static inline bool nvme_ctrl_use_ana(struct nvme_ctrl *ctrl)
529{
530 return false;
531}
532
533
534
535
536static inline void nvme_set_disk_name(char *disk_name, struct nvme_ns *ns,
537 struct nvme_ctrl *ctrl, int *flags)
538{
539 sprintf(disk_name, "nvme%dn%d", ctrl->instance, ns->head->instance);
540}
541
542static inline void nvme_failover_req(struct request *req)
543{
544}
545static inline void nvme_kick_requeue_lists(struct nvme_ctrl *ctrl)
546{
547}
548static inline int nvme_mpath_alloc_disk(struct nvme_ctrl *ctrl,
549 struct nvme_ns_head *head)
550{
551 return 0;
552}
553static inline void nvme_mpath_add_disk(struct nvme_ns *ns,
554 struct nvme_id_ns *id)
555{
556}
557static inline void nvme_mpath_remove_disk(struct nvme_ns_head *head)
558{
559}
560static inline bool nvme_mpath_clear_current_path(struct nvme_ns *ns)
561{
562 return false;
563}
564static inline void nvme_mpath_clear_ctrl_paths(struct nvme_ctrl *ctrl)
565{
566}
567static inline void nvme_mpath_check_last_path(struct nvme_ns *ns)
568{
569}
570static inline int nvme_mpath_init(struct nvme_ctrl *ctrl,
571 struct nvme_id_ctrl *id)
572{
573 if (ctrl->subsys->cmic & (1 << 3))
574 dev_warn(ctrl->device,
575"Please enable CONFIG_NVME_MULTIPATH for full support of multi-port devices.\n");
576 return 0;
577}
578static inline void nvme_mpath_uninit(struct nvme_ctrl *ctrl)
579{
580}
581static inline void nvme_mpath_stop(struct nvme_ctrl *ctrl)
582{
583}
584static inline void nvme_mpath_unfreeze(struct nvme_subsystem *subsys)
585{
586}
587static inline void nvme_mpath_wait_freeze(struct nvme_subsystem *subsys)
588{
589}
590static inline void nvme_mpath_start_freeze(struct nvme_subsystem *subsys)
591{
592}
593#endif
594
595#ifdef CONFIG_NVM
596int nvme_nvm_register(struct nvme_ns *ns, char *disk_name, int node);
597void nvme_nvm_unregister(struct nvme_ns *ns);
598extern const struct attribute_group nvme_nvm_attr_group;
599int nvme_nvm_ioctl(struct nvme_ns *ns, unsigned int cmd, unsigned long arg);
600#else
601static inline int nvme_nvm_register(struct nvme_ns *ns, char *disk_name,
602 int node)
603{
604 return 0;
605}
606
607static inline void nvme_nvm_unregister(struct nvme_ns *ns) {};
608static inline int nvme_nvm_ioctl(struct nvme_ns *ns, unsigned int cmd,
609 unsigned long arg)
610{
611 return -ENOTTY;
612}
613#endif
614
615static inline struct nvme_ns *nvme_get_ns_from_dev(struct device *dev)
616{
617 return dev_to_disk(dev)->private_data;
618}
619
620#endif
621