1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * Copyright (c) 2011-2014, Intel Corporation.
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/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>
19
20 #include <trace/events/block.h>
21
22 extern const struct pr_ops nvme_pr_ops;
23
24 extern unsigned int nvme_io_timeout;
25 #define NVME_IO_TIMEOUT (nvme_io_timeout * HZ)
26
27 extern unsigned int admin_timeout;
28 #define NVME_ADMIN_TIMEOUT (admin_timeout * HZ)
29
30 #define NVME_DEFAULT_KATO 5
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 * Default to a 4K page size, with the intention to update this
42 * path in the future to accommodate architectures with differing
43 * kernel and IO page sizes.
44 */
45 #define NVME_CTRL_PAGE_SHIFT 12
46 #define NVME_CTRL_PAGE_SIZE (1 << NVME_CTRL_PAGE_SHIFT)
47
48 extern struct workqueue_struct *nvme_wq;
49 extern struct workqueue_struct *nvme_reset_wq;
50 extern struct workqueue_struct *nvme_delete_wq;
51 extern struct mutex nvme_subsystems_lock;
52
53 /*
54 * List of workarounds for devices that required behavior not specified in
55 * the standard.
56 */
57 enum nvme_quirks {
58 /*
59 * Prefers I/O aligned to a stripe size specified in a vendor
60 * specific Identify field.
61 */
62 NVME_QUIRK_STRIPE_SIZE = (1 << 0),
63
64 /*
65 * The controller doesn't handle Identify value others than 0 or 1
66 * correctly.
67 */
68 NVME_QUIRK_IDENTIFY_CNS = (1 << 1),
69
70 /*
71 * The controller deterministically returns O's on reads to
72 * logical blocks that deallocate was called on.
73 */
74 NVME_QUIRK_DEALLOCATE_ZEROES = (1 << 2),
75
76 /*
77 * The controller needs a delay before starts checking the device
78 * readiness, which is done by reading the NVME_CSTS_RDY bit.
79 */
80 NVME_QUIRK_DELAY_BEFORE_CHK_RDY = (1 << 3),
81
82 /*
83 * APST should not be used.
84 */
85 NVME_QUIRK_NO_APST = (1 << 4),
86
87 /*
88 * The deepest sleep state should not be used.
89 */
90 NVME_QUIRK_NO_DEEPEST_PS = (1 << 5),
91
92 /*
93 * Problems seen with concurrent commands
94 */
95 NVME_QUIRK_QDEPTH_ONE = (1 << 6),
96
97 /*
98 * Set MEDIUM priority on SQ creation
99 */
100 NVME_QUIRK_MEDIUM_PRIO_SQ = (1 << 7),
101
102 /*
103 * Ignore device provided subnqn.
104 */
105 NVME_QUIRK_IGNORE_DEV_SUBNQN = (1 << 8),
106
107 /*
108 * Broken Write Zeroes.
109 */
110 NVME_QUIRK_DISABLE_WRITE_ZEROES = (1 << 9),
111
112 /*
113 * Force simple suspend/resume path.
114 */
115 NVME_QUIRK_SIMPLE_SUSPEND = (1 << 10),
116
117 /*
118 * Use only one interrupt vector for all queues
119 */
120 NVME_QUIRK_SINGLE_VECTOR = (1 << 11),
121
122 /*
123 * Use non-standard 128 bytes SQEs.
124 */
125 NVME_QUIRK_128_BYTES_SQES = (1 << 12),
126
127 /*
128 * Prevent tag overlap between queues
129 */
130 NVME_QUIRK_SHARED_TAGS = (1 << 13),
131
132 /*
133 * Don't change the value of the temperature threshold feature
134 */
135 NVME_QUIRK_NO_TEMP_THRESH_CHANGE = (1 << 14),
136
137 /*
138 * The controller doesn't handle the Identify Namespace
139 * Identification Descriptor list subcommand despite claiming
140 * NVMe 1.3 compliance.
141 */
142 NVME_QUIRK_NO_NS_DESC_LIST = (1 << 15),
143
144 /*
145 * The controller does not properly handle DMA addresses over
146 * 48 bits.
147 */
148 NVME_QUIRK_DMA_ADDRESS_BITS_48 = (1 << 16),
149
150 /*
151 * The controller requires the command_id value be limited, so skip
152 * encoding the generation sequence number.
153 */
154 NVME_QUIRK_SKIP_CID_GEN = (1 << 17),
155
156 /*
157 * Reports garbage in the namespace identifiers (eui64, nguid, uuid).
158 */
159 NVME_QUIRK_BOGUS_NID = (1 << 18),
160
161 /*
162 * No temperature thresholds for channels other than 0 (Composite).
163 */
164 NVME_QUIRK_NO_SECONDARY_TEMP_THRESH = (1 << 19),
165
166 /*
167 * Disables simple suspend/resume path.
168 */
169 NVME_QUIRK_FORCE_NO_SIMPLE_SUSPEND = (1 << 20),
170
171 /*
172 * MSI (but not MSI-X) interrupts are broken and never fire.
173 */
174 NVME_QUIRK_BROKEN_MSI = (1 << 21),
175 };
176
177 /*
178 * Common request structure for NVMe passthrough. All drivers must have
179 * this structure as the first member of their request-private data.
180 */
181 struct nvme_request {
182 struct nvme_command *cmd;
183 union nvme_result result;
184 u8 genctr;
185 u8 retries;
186 u8 flags;
187 u16 status;
188 #ifdef CONFIG_NVME_MULTIPATH
189 unsigned long start_time;
190 #endif
191 struct nvme_ctrl *ctrl;
192 };
193
194 /*
195 * Mark a bio as coming in through the mpath node.
196 */
197 #define REQ_NVME_MPATH REQ_DRV
198
199 enum {
200 NVME_REQ_CANCELLED = (1 << 0),
201 NVME_REQ_USERCMD = (1 << 1),
202 NVME_MPATH_IO_STATS = (1 << 2),
203 NVME_MPATH_CNT_ACTIVE = (1 << 3),
204 };
205
nvme_req(struct request * req)206 static inline struct nvme_request *nvme_req(struct request *req)
207 {
208 return blk_mq_rq_to_pdu(req);
209 }
210
nvme_req_qid(struct request * req)211 static inline u16 nvme_req_qid(struct request *req)
212 {
213 if (!req->q->queuedata)
214 return 0;
215
216 return req->mq_hctx->queue_num + 1;
217 }
218
219 /* The below value is the specific amount of delay needed before checking
220 * readiness in case of the PCI_DEVICE(0x1c58, 0x0003), which needs the
221 * NVME_QUIRK_DELAY_BEFORE_CHK_RDY quirk enabled. The value (in ms) was
222 * found empirically.
223 */
224 #define NVME_QUIRK_DELAY_AMOUNT 2300
225
226 /*
227 * enum nvme_ctrl_state: Controller state
228 *
229 * @NVME_CTRL_NEW: New controller just allocated, initial state
230 * @NVME_CTRL_LIVE: Controller is connected and I/O capable
231 * @NVME_CTRL_RESETTING: Controller is resetting (or scheduled reset)
232 * @NVME_CTRL_CONNECTING: Controller is disconnected, now connecting the
233 * transport
234 * @NVME_CTRL_DELETING: Controller is deleting (or scheduled deletion)
235 * @NVME_CTRL_DELETING_NOIO: Controller is deleting and I/O is not
236 * disabled/failed immediately. This state comes
237 * after all async event processing took place and
238 * before ns removal and the controller deletion
239 * progress
240 * @NVME_CTRL_DEAD: Controller is non-present/unresponsive during
241 * shutdown or removal. In this case we forcibly
242 * kill all inflight I/O as they have no chance to
243 * complete
244 */
245 enum nvme_ctrl_state {
246 NVME_CTRL_NEW,
247 NVME_CTRL_LIVE,
248 NVME_CTRL_RESETTING,
249 NVME_CTRL_CONNECTING,
250 NVME_CTRL_DELETING,
251 NVME_CTRL_DELETING_NOIO,
252 NVME_CTRL_DEAD,
253 };
254
255 struct nvme_fault_inject {
256 #ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
257 struct fault_attr attr;
258 struct dentry *parent;
259 bool dont_retry; /* DNR, do not retry */
260 u16 status; /* status code */
261 #endif
262 };
263
264 enum nvme_ctrl_flags {
265 NVME_CTRL_FAILFAST_EXPIRED = 0,
266 NVME_CTRL_ADMIN_Q_STOPPED = 1,
267 NVME_CTRL_STARTED_ONCE = 2,
268 NVME_CTRL_STOPPED = 3,
269 NVME_CTRL_SKIP_ID_CNS_CS = 4,
270 NVME_CTRL_DIRTY_CAPABILITY = 5,
271 NVME_CTRL_FROZEN = 6,
272 };
273
274 struct nvme_ctrl {
275 bool comp_seen;
276 bool identified;
277 enum nvme_ctrl_state state;
278 spinlock_t lock;
279 struct mutex scan_lock;
280 const struct nvme_ctrl_ops *ops;
281 struct request_queue *admin_q;
282 struct request_queue *connect_q;
283 struct request_queue *fabrics_q;
284 struct device *dev;
285 int instance;
286 int numa_node;
287 struct blk_mq_tag_set *tagset;
288 struct blk_mq_tag_set *admin_tagset;
289 struct list_head namespaces;
290 struct mutex namespaces_lock;
291 struct srcu_struct srcu;
292 struct device ctrl_device;
293 struct device *device; /* char device */
294 #ifdef CONFIG_NVME_HWMON
295 struct device *hwmon_device;
296 #endif
297 struct cdev cdev;
298 struct work_struct reset_work;
299 struct work_struct delete_work;
300 wait_queue_head_t state_wq;
301
302 struct nvme_subsystem *subsys;
303 struct list_head subsys_entry;
304
305 struct opal_dev *opal_dev;
306
307 char name[12];
308 u16 cntlid;
309
310 u16 mtfa;
311 u32 ctrl_config;
312 u32 queue_count;
313
314 u64 cap;
315 u32 max_hw_sectors;
316 u32 max_segments;
317 u32 max_integrity_segments;
318 u32 max_discard_sectors;
319 u32 max_discard_segments;
320 u32 max_zeroes_sectors;
321 #ifdef CONFIG_BLK_DEV_ZONED
322 u32 max_zone_append;
323 #endif
324 u16 crdt[3];
325 u16 oncs;
326 u32 dmrsl;
327 u16 oacs;
328 u16 sqsize;
329 u32 max_namespaces;
330 atomic_t abort_limit;
331 u8 vwc;
332 u32 vs;
333 u32 sgls;
334 u16 kas;
335 u8 npss;
336 u8 apsta;
337 u16 wctemp;
338 u16 cctemp;
339 u32 oaes;
340 u32 aen_result;
341 u32 ctratt;
342 unsigned int shutdown_timeout;
343 unsigned int kato;
344 bool subsystem;
345 unsigned long quirks;
346 struct nvme_id_power_state psd[32];
347 struct nvme_effects_log *effects;
348 struct xarray cels;
349 struct work_struct scan_work;
350 struct work_struct async_event_work;
351 struct delayed_work ka_work;
352 struct delayed_work failfast_work;
353 struct nvme_command ka_cmd;
354 unsigned long ka_last_check_time;
355 struct work_struct fw_act_work;
356 unsigned long events;
357
358 #ifdef CONFIG_NVME_MULTIPATH
359 /* asymmetric namespace access: */
360 u8 anacap;
361 u8 anatt;
362 u32 anagrpmax;
363 u32 nanagrpid;
364 struct mutex ana_lock;
365 struct nvme_ana_rsp_hdr *ana_log_buf;
366 size_t ana_log_size;
367 struct timer_list anatt_timer;
368 struct work_struct ana_work;
369 atomic_t nr_active;
370 #endif
371
372 #ifdef CONFIG_NVME_AUTH
373 struct work_struct dhchap_auth_work;
374 struct mutex dhchap_auth_mutex;
375 struct nvme_dhchap_queue_context *dhchap_ctxs;
376 struct nvme_dhchap_key *host_key;
377 struct nvme_dhchap_key *ctrl_key;
378 u16 transaction;
379 #endif
380
381 /* Power saving configuration */
382 u64 ps_max_latency_us;
383 bool apst_enabled;
384
385 /* PCIe only: */
386 u16 hmmaxd;
387 u32 hmpre;
388 u32 hmmin;
389 u32 hmminds;
390
391 /* Fabrics only */
392 u32 ioccsz;
393 u32 iorcsz;
394 u16 icdoff;
395 u16 maxcmd;
396 int nr_reconnects;
397 unsigned long flags;
398 struct nvmf_ctrl_options *opts;
399
400 struct page *discard_page;
401 unsigned long discard_page_busy;
402
403 struct nvme_fault_inject fault_inject;
404
405 enum nvme_ctrl_type cntrltype;
406 enum nvme_dctype dctype;
407 };
408
nvme_ctrl_state(struct nvme_ctrl * ctrl)409 static inline enum nvme_ctrl_state nvme_ctrl_state(struct nvme_ctrl *ctrl)
410 {
411 return READ_ONCE(ctrl->state);
412 }
413
414 enum nvme_iopolicy {
415 NVME_IOPOLICY_NUMA,
416 NVME_IOPOLICY_RR,
417 NVME_IOPOLICY_QD,
418 };
419
420 struct nvme_subsystem {
421 int instance;
422 struct device dev;
423 /*
424 * Because we unregister the device on the last put we need
425 * a separate refcount.
426 */
427 struct kref ref;
428 struct list_head entry;
429 struct mutex lock;
430 struct list_head ctrls;
431 struct list_head nsheads;
432 char subnqn[NVMF_NQN_SIZE];
433 char serial[20];
434 char model[40];
435 char firmware_rev[8];
436 u8 cmic;
437 enum nvme_subsys_type subtype;
438 u16 vendor_id;
439 u16 awupf; /* 0's based awupf value. */
440 struct ida ns_ida;
441 #ifdef CONFIG_NVME_MULTIPATH
442 enum nvme_iopolicy iopolicy;
443 #endif
444 };
445
446 /*
447 * Container structure for uniqueue namespace identifiers.
448 */
449 struct nvme_ns_ids {
450 u8 eui64[8];
451 u8 nguid[16];
452 uuid_t uuid;
453 u8 csi;
454 };
455
456 /*
457 * Anchor structure for namespaces. There is one for each namespace in a
458 * NVMe subsystem that any of our controllers can see, and the namespace
459 * structure for each controller is chained of it. For private namespaces
460 * there is a 1:1 relation to our namespace structures, that is ->list
461 * only ever has a single entry for private namespaces.
462 */
463 struct nvme_ns_head {
464 struct list_head list;
465 struct srcu_struct srcu;
466 struct nvme_subsystem *subsys;
467 unsigned ns_id;
468 struct nvme_ns_ids ids;
469 struct list_head entry;
470 struct kref ref;
471 bool shared;
472 int instance;
473 struct nvme_effects_log *effects;
474
475 struct cdev cdev;
476 struct device cdev_device;
477
478 struct gendisk *disk;
479 #ifdef CONFIG_NVME_MULTIPATH
480 struct bio_list requeue_list;
481 spinlock_t requeue_lock;
482 struct work_struct requeue_work;
483 struct work_struct partition_scan_work;
484 struct mutex lock;
485 unsigned long flags;
486 #define NVME_NSHEAD_DISK_LIVE 0
487 struct nvme_ns __rcu *current_path[];
488 #endif
489 };
490
nvme_ns_head_multipath(struct nvme_ns_head * head)491 static inline bool nvme_ns_head_multipath(struct nvme_ns_head *head)
492 {
493 return IS_ENABLED(CONFIG_NVME_MULTIPATH) && head->disk;
494 }
495
496 enum nvme_ns_features {
497 NVME_NS_EXT_LBAS = 1 << 0, /* support extended LBA format */
498 NVME_NS_METADATA_SUPPORTED = 1 << 1, /* support getting generated md */
499 NVME_NS_DEAC = 1 << 2, /* DEAC bit in Write Zeores supported */
500 };
501
502 struct nvme_ns {
503 struct list_head list;
504
505 struct nvme_ctrl *ctrl;
506 struct request_queue *queue;
507 struct gendisk *disk;
508 #ifdef CONFIG_NVME_MULTIPATH
509 enum nvme_ana_state ana_state;
510 u32 ana_grpid;
511 #endif
512 struct list_head siblings;
513 struct kref kref;
514 struct nvme_ns_head *head;
515
516 int lba_shift;
517 u16 ms;
518 u16 pi_size;
519 u16 sgs;
520 u32 sws;
521 u8 pi_type;
522 u8 guard_type;
523 #ifdef CONFIG_BLK_DEV_ZONED
524 u64 zsze;
525 #endif
526 unsigned long features;
527 unsigned long flags;
528 #define NVME_NS_REMOVING 0
529 #define NVME_NS_ANA_PENDING 2
530 #define NVME_NS_FORCE_RO 3
531 #define NVME_NS_READY 4
532
533 struct cdev cdev;
534 struct device cdev_device;
535
536 struct nvme_fault_inject fault_inject;
537
538 };
539
540 /* NVMe ns supports metadata actions by the controller (generate/strip) */
nvme_ns_has_pi(struct nvme_ns * ns)541 static inline bool nvme_ns_has_pi(struct nvme_ns *ns)
542 {
543 return ns->pi_type && ns->ms == ns->pi_size;
544 }
545
546 struct nvme_ctrl_ops {
547 const char *name;
548 struct module *module;
549 unsigned int flags;
550 #define NVME_F_FABRICS (1 << 0)
551 #define NVME_F_METADATA_SUPPORTED (1 << 1)
552 #define NVME_F_BLOCKING (1 << 2)
553
554 const struct attribute_group **dev_attr_groups;
555 int (*reg_read32)(struct nvme_ctrl *ctrl, u32 off, u32 *val);
556 int (*reg_write32)(struct nvme_ctrl *ctrl, u32 off, u32 val);
557 int (*reg_read64)(struct nvme_ctrl *ctrl, u32 off, u64 *val);
558 void (*free_ctrl)(struct nvme_ctrl *ctrl);
559 void (*submit_async_event)(struct nvme_ctrl *ctrl);
560 void (*delete_ctrl)(struct nvme_ctrl *ctrl);
561 void (*stop_ctrl)(struct nvme_ctrl *ctrl);
562 int (*get_address)(struct nvme_ctrl *ctrl, char *buf, int size);
563 void (*print_device_info)(struct nvme_ctrl *ctrl);
564 bool (*supports_pci_p2pdma)(struct nvme_ctrl *ctrl);
565 };
566
567 /*
568 * nvme command_id is constructed as such:
569 * | xxxx | xxxxxxxxxxxx |
570 * gen request tag
571 */
572 #define nvme_genctr_mask(gen) (gen & 0xf)
573 #define nvme_cid_install_genctr(gen) (nvme_genctr_mask(gen) << 12)
574 #define nvme_genctr_from_cid(cid) ((cid & 0xf000) >> 12)
575 #define nvme_tag_from_cid(cid) (cid & 0xfff)
576
nvme_cid(struct request * rq)577 static inline u16 nvme_cid(struct request *rq)
578 {
579 return nvme_cid_install_genctr(nvme_req(rq)->genctr) | rq->tag;
580 }
581
nvme_find_rq(struct blk_mq_tags * tags,u16 command_id)582 static inline struct request *nvme_find_rq(struct blk_mq_tags *tags,
583 u16 command_id)
584 {
585 u8 genctr = nvme_genctr_from_cid(command_id);
586 u16 tag = nvme_tag_from_cid(command_id);
587 struct request *rq;
588
589 rq = blk_mq_tag_to_rq(tags, tag);
590 if (unlikely(!rq)) {
591 pr_err("could not locate request for tag %#x\n",
592 tag);
593 return NULL;
594 }
595 if (unlikely(nvme_genctr_mask(nvme_req(rq)->genctr) != genctr)) {
596 dev_err(nvme_req(rq)->ctrl->device,
597 "request %#x genctr mismatch (got %#x expected %#x)\n",
598 tag, genctr, nvme_genctr_mask(nvme_req(rq)->genctr));
599 return NULL;
600 }
601 return rq;
602 }
603
nvme_cid_to_rq(struct blk_mq_tags * tags,u16 command_id)604 static inline struct request *nvme_cid_to_rq(struct blk_mq_tags *tags,
605 u16 command_id)
606 {
607 return blk_mq_tag_to_rq(tags, nvme_tag_from_cid(command_id));
608 }
609
610 /*
611 * Return the length of the string without the space padding
612 */
nvme_strlen(char * s,int len)613 static inline int nvme_strlen(char *s, int len)
614 {
615 while (s[len - 1] == ' ')
616 len--;
617 return len;
618 }
619
nvme_print_device_info(struct nvme_ctrl * ctrl)620 static inline void nvme_print_device_info(struct nvme_ctrl *ctrl)
621 {
622 struct nvme_subsystem *subsys = ctrl->subsys;
623
624 if (ctrl->ops->print_device_info) {
625 ctrl->ops->print_device_info(ctrl);
626 return;
627 }
628
629 dev_err(ctrl->device,
630 "VID:%04x model:%.*s firmware:%.*s\n", subsys->vendor_id,
631 nvme_strlen(subsys->model, sizeof(subsys->model)),
632 subsys->model, nvme_strlen(subsys->firmware_rev,
633 sizeof(subsys->firmware_rev)),
634 subsys->firmware_rev);
635 }
636
637 #ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
638 void nvme_fault_inject_init(struct nvme_fault_inject *fault_inj,
639 const char *dev_name);
640 void nvme_fault_inject_fini(struct nvme_fault_inject *fault_inject);
641 void nvme_should_fail(struct request *req);
642 #else
nvme_fault_inject_init(struct nvme_fault_inject * fault_inj,const char * dev_name)643 static inline void nvme_fault_inject_init(struct nvme_fault_inject *fault_inj,
644 const char *dev_name)
645 {
646 }
nvme_fault_inject_fini(struct nvme_fault_inject * fault_inj)647 static inline void nvme_fault_inject_fini(struct nvme_fault_inject *fault_inj)
648 {
649 }
nvme_should_fail(struct request * req)650 static inline void nvme_should_fail(struct request *req) {}
651 #endif
652
653 bool nvme_wait_reset(struct nvme_ctrl *ctrl);
654 int nvme_try_sched_reset(struct nvme_ctrl *ctrl);
655
nvme_reset_subsystem(struct nvme_ctrl * ctrl)656 static inline int nvme_reset_subsystem(struct nvme_ctrl *ctrl)
657 {
658 int ret;
659
660 if (!ctrl->subsystem)
661 return -ENOTTY;
662 if (!nvme_wait_reset(ctrl))
663 return -EBUSY;
664
665 ret = ctrl->ops->reg_write32(ctrl, NVME_REG_NSSR, 0x4E564D65);
666 if (ret)
667 return ret;
668
669 return nvme_try_sched_reset(ctrl);
670 }
671
672 /*
673 * Convert a 512B sector number to a device logical block number.
674 */
nvme_sect_to_lba(struct nvme_ns * ns,sector_t sector)675 static inline u64 nvme_sect_to_lba(struct nvme_ns *ns, sector_t sector)
676 {
677 return sector >> (ns->lba_shift - SECTOR_SHIFT);
678 }
679
680 /*
681 * Convert a device logical block number to a 512B sector number.
682 */
nvme_lba_to_sect(struct nvme_ns * ns,u64 lba)683 static inline sector_t nvme_lba_to_sect(struct nvme_ns *ns, u64 lba)
684 {
685 return lba << (ns->lba_shift - SECTOR_SHIFT);
686 }
687
688 /*
689 * Convert byte length to nvme's 0-based num dwords
690 */
nvme_bytes_to_numd(size_t len)691 static inline u32 nvme_bytes_to_numd(size_t len)
692 {
693 return (len >> 2) - 1;
694 }
695
nvme_is_ana_error(u16 status)696 static inline bool nvme_is_ana_error(u16 status)
697 {
698 switch (status & 0x7ff) {
699 case NVME_SC_ANA_TRANSITION:
700 case NVME_SC_ANA_INACCESSIBLE:
701 case NVME_SC_ANA_PERSISTENT_LOSS:
702 return true;
703 default:
704 return false;
705 }
706 }
707
nvme_is_path_error(u16 status)708 static inline bool nvme_is_path_error(u16 status)
709 {
710 /* check for a status code type of 'path related status' */
711 return (status & 0x700) == 0x300;
712 }
713
714 /*
715 * Fill in the status and result information from the CQE, and then figure out
716 * if blk-mq will need to use IPI magic to complete the request, and if yes do
717 * so. If not let the caller complete the request without an indirect function
718 * call.
719 */
nvme_try_complete_req(struct request * req,__le16 status,union nvme_result result)720 static inline bool nvme_try_complete_req(struct request *req, __le16 status,
721 union nvme_result result)
722 {
723 struct nvme_request *rq = nvme_req(req);
724 struct nvme_ctrl *ctrl = rq->ctrl;
725
726 if (!(ctrl->quirks & NVME_QUIRK_SKIP_CID_GEN))
727 rq->genctr++;
728
729 rq->status = le16_to_cpu(status) >> 1;
730 rq->result = result;
731 /* inject error when permitted by fault injection framework */
732 nvme_should_fail(req);
733 if (unlikely(blk_should_fake_timeout(req->q)))
734 return true;
735 return blk_mq_complete_request_remote(req);
736 }
737
nvme_get_ctrl(struct nvme_ctrl * ctrl)738 static inline void nvme_get_ctrl(struct nvme_ctrl *ctrl)
739 {
740 get_device(ctrl->device);
741 }
742
nvme_put_ctrl(struct nvme_ctrl * ctrl)743 static inline void nvme_put_ctrl(struct nvme_ctrl *ctrl)
744 {
745 put_device(ctrl->device);
746 }
747
nvme_is_aen_req(u16 qid,__u16 command_id)748 static inline bool nvme_is_aen_req(u16 qid, __u16 command_id)
749 {
750 return !qid &&
751 nvme_tag_from_cid(command_id) >= NVME_AQ_BLK_MQ_DEPTH;
752 }
753
754 /*
755 * Returns true for sink states that can't ever transition back to live.
756 */
nvme_state_terminal(struct nvme_ctrl * ctrl)757 static inline bool nvme_state_terminal(struct nvme_ctrl *ctrl)
758 {
759 switch (nvme_ctrl_state(ctrl)) {
760 case NVME_CTRL_NEW:
761 case NVME_CTRL_LIVE:
762 case NVME_CTRL_RESETTING:
763 case NVME_CTRL_CONNECTING:
764 return false;
765 case NVME_CTRL_DELETING:
766 case NVME_CTRL_DELETING_NOIO:
767 case NVME_CTRL_DEAD:
768 return true;
769 default:
770 WARN_ONCE(1, "Unhandled ctrl state:%d", ctrl->state);
771 return true;
772 }
773 }
774
775 void nvme_end_req(struct request *req);
776 void nvme_complete_rq(struct request *req);
777 void nvme_complete_batch_req(struct request *req);
778
nvme_complete_batch(struct io_comp_batch * iob,void (* fn)(struct request * rq))779 static __always_inline void nvme_complete_batch(struct io_comp_batch *iob,
780 void (*fn)(struct request *rq))
781 {
782 struct request *req;
783
784 rq_list_for_each(&iob->req_list, req) {
785 fn(req);
786 nvme_complete_batch_req(req);
787 }
788 blk_mq_end_request_batch(iob);
789 }
790
791 blk_status_t nvme_host_path_error(struct request *req);
792 bool nvme_cancel_request(struct request *req, void *data);
793 void nvme_cancel_tagset(struct nvme_ctrl *ctrl);
794 void nvme_cancel_admin_tagset(struct nvme_ctrl *ctrl);
795 bool nvme_change_ctrl_state(struct nvme_ctrl *ctrl,
796 enum nvme_ctrl_state new_state);
797 int nvme_disable_ctrl(struct nvme_ctrl *ctrl, bool shutdown);
798 int nvme_enable_ctrl(struct nvme_ctrl *ctrl);
799 int nvme_init_ctrl(struct nvme_ctrl *ctrl, struct device *dev,
800 const struct nvme_ctrl_ops *ops, unsigned long quirks);
801 void nvme_uninit_ctrl(struct nvme_ctrl *ctrl);
802 void nvme_start_ctrl(struct nvme_ctrl *ctrl);
803 void nvme_stop_ctrl(struct nvme_ctrl *ctrl);
804 int nvme_init_ctrl_finish(struct nvme_ctrl *ctrl, bool was_suspended);
805 int nvme_alloc_admin_tag_set(struct nvme_ctrl *ctrl, struct blk_mq_tag_set *set,
806 const struct blk_mq_ops *ops, unsigned int cmd_size);
807 void nvme_remove_admin_tag_set(struct nvme_ctrl *ctrl);
808 int nvme_alloc_io_tag_set(struct nvme_ctrl *ctrl, struct blk_mq_tag_set *set,
809 const struct blk_mq_ops *ops, unsigned int nr_maps,
810 unsigned int cmd_size);
811 void nvme_remove_io_tag_set(struct nvme_ctrl *ctrl);
812
813 void nvme_remove_namespaces(struct nvme_ctrl *ctrl);
814
815 void nvme_complete_async_event(struct nvme_ctrl *ctrl, __le16 status,
816 volatile union nvme_result *res);
817
818 void nvme_quiesce_io_queues(struct nvme_ctrl *ctrl);
819 void nvme_unquiesce_io_queues(struct nvme_ctrl *ctrl);
820 void nvme_quiesce_admin_queue(struct nvme_ctrl *ctrl);
821 void nvme_unquiesce_admin_queue(struct nvme_ctrl *ctrl);
822 void nvme_mark_namespaces_dead(struct nvme_ctrl *ctrl);
823 void nvme_sync_queues(struct nvme_ctrl *ctrl);
824 void nvme_sync_io_queues(struct nvme_ctrl *ctrl);
825 void nvme_unfreeze(struct nvme_ctrl *ctrl);
826 void nvme_wait_freeze(struct nvme_ctrl *ctrl);
827 int nvme_wait_freeze_timeout(struct nvme_ctrl *ctrl, long timeout);
828 void nvme_start_freeze(struct nvme_ctrl *ctrl);
829
nvme_req_op(struct nvme_command * cmd)830 static inline enum req_op nvme_req_op(struct nvme_command *cmd)
831 {
832 return nvme_is_write(cmd) ? REQ_OP_DRV_OUT : REQ_OP_DRV_IN;
833 }
834
835 #define NVME_QID_ANY -1
836 void nvme_init_request(struct request *req, struct nvme_command *cmd);
837 void nvme_cleanup_cmd(struct request *req);
838 blk_status_t nvme_setup_cmd(struct nvme_ns *ns, struct request *req);
839 blk_status_t nvme_fail_nonready_command(struct nvme_ctrl *ctrl,
840 struct request *req);
841 bool __nvme_check_ready(struct nvme_ctrl *ctrl, struct request *rq,
842 bool queue_live);
843
nvme_check_ready(struct nvme_ctrl * ctrl,struct request * rq,bool queue_live)844 static inline bool nvme_check_ready(struct nvme_ctrl *ctrl, struct request *rq,
845 bool queue_live)
846 {
847 if (likely(ctrl->state == NVME_CTRL_LIVE))
848 return true;
849 if (ctrl->ops->flags & NVME_F_FABRICS &&
850 ctrl->state == NVME_CTRL_DELETING)
851 return queue_live;
852 return __nvme_check_ready(ctrl, rq, queue_live);
853 }
854
855 /*
856 * NSID shall be unique for all shared namespaces, or if at least one of the
857 * following conditions is met:
858 * 1. Namespace Management is supported by the controller
859 * 2. ANA is supported by the controller
860 * 3. NVM Set are supported by the controller
861 *
862 * In other case, private namespace are not required to report a unique NSID.
863 */
nvme_is_unique_nsid(struct nvme_ctrl * ctrl,struct nvme_ns_head * head)864 static inline bool nvme_is_unique_nsid(struct nvme_ctrl *ctrl,
865 struct nvme_ns_head *head)
866 {
867 return head->shared ||
868 (ctrl->oacs & NVME_CTRL_OACS_NS_MNGT_SUPP) ||
869 (ctrl->subsys->cmic & NVME_CTRL_CMIC_ANA) ||
870 (ctrl->ctratt & NVME_CTRL_CTRATT_NVM_SETS);
871 }
872
873 int nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd,
874 void *buf, unsigned bufflen);
875 int __nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd,
876 union nvme_result *result, void *buffer, unsigned bufflen,
877 int qid, int at_head,
878 blk_mq_req_flags_t flags);
879 int nvme_set_features(struct nvme_ctrl *dev, unsigned int fid,
880 unsigned int dword11, void *buffer, size_t buflen,
881 u32 *result);
882 int nvme_get_features(struct nvme_ctrl *dev, unsigned int fid,
883 unsigned int dword11, void *buffer, size_t buflen,
884 u32 *result);
885 int nvme_set_queue_count(struct nvme_ctrl *ctrl, int *count);
886 void nvme_stop_keep_alive(struct nvme_ctrl *ctrl);
887 int nvme_reset_ctrl(struct nvme_ctrl *ctrl);
888 int nvme_reset_ctrl_sync(struct nvme_ctrl *ctrl);
889 int nvme_delete_ctrl(struct nvme_ctrl *ctrl);
890 void nvme_queue_scan(struct nvme_ctrl *ctrl);
891 int nvme_get_log(struct nvme_ctrl *ctrl, u32 nsid, u8 log_page, u8 lsp, u8 csi,
892 void *log, size_t size, u64 offset);
893 bool nvme_tryget_ns_head(struct nvme_ns_head *head);
894 void nvme_put_ns_head(struct nvme_ns_head *head);
895 int nvme_cdev_add(struct cdev *cdev, struct device *cdev_device,
896 const struct file_operations *fops, struct module *owner);
897 void nvme_cdev_del(struct cdev *cdev, struct device *cdev_device);
898 int nvme_ioctl(struct block_device *bdev, blk_mode_t mode,
899 unsigned int cmd, unsigned long arg);
900 long nvme_ns_chr_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
901 int nvme_ns_head_ioctl(struct block_device *bdev, blk_mode_t mode,
902 unsigned int cmd, unsigned long arg);
903 long nvme_ns_head_chr_ioctl(struct file *file, unsigned int cmd,
904 unsigned long arg);
905 long nvme_dev_ioctl(struct file *file, unsigned int cmd,
906 unsigned long arg);
907 int nvme_ns_chr_uring_cmd_iopoll(struct io_uring_cmd *ioucmd,
908 struct io_comp_batch *iob, unsigned int poll_flags);
909 int nvme_ns_chr_uring_cmd(struct io_uring_cmd *ioucmd,
910 unsigned int issue_flags);
911 int nvme_ns_head_chr_uring_cmd(struct io_uring_cmd *ioucmd,
912 unsigned int issue_flags);
913 int nvme_getgeo(struct block_device *bdev, struct hd_geometry *geo);
914 int nvme_dev_uring_cmd(struct io_uring_cmd *ioucmd, unsigned int issue_flags);
915
916 extern const struct attribute_group *nvme_ns_id_attr_groups[];
917 extern const struct pr_ops nvme_pr_ops;
918 extern const struct block_device_operations nvme_ns_head_ops;
919 extern const struct attribute_group nvme_dev_attrs_group;
920 extern const struct attribute_group *nvme_subsys_attrs_groups[];
921 extern const struct attribute_group *nvme_dev_attr_groups[];
922 extern const struct block_device_operations nvme_bdev_ops;
923
924 void nvme_delete_ctrl_sync(struct nvme_ctrl *ctrl);
925 struct nvme_ns *nvme_find_path(struct nvme_ns_head *head);
926 #ifdef CONFIG_NVME_MULTIPATH
nvme_ctrl_use_ana(struct nvme_ctrl * ctrl)927 static inline bool nvme_ctrl_use_ana(struct nvme_ctrl *ctrl)
928 {
929 return ctrl->ana_log_buf != NULL;
930 }
931
932 void nvme_mpath_unfreeze(struct nvme_subsystem *subsys);
933 void nvme_mpath_wait_freeze(struct nvme_subsystem *subsys);
934 void nvme_mpath_start_freeze(struct nvme_subsystem *subsys);
935 void nvme_mpath_default_iopolicy(struct nvme_subsystem *subsys);
936 void nvme_failover_req(struct request *req);
937 void nvme_kick_requeue_lists(struct nvme_ctrl *ctrl);
938 int nvme_mpath_alloc_disk(struct nvme_ctrl *ctrl,struct nvme_ns_head *head);
939 void nvme_mpath_add_disk(struct nvme_ns *ns, __le32 anagrpid);
940 void nvme_mpath_remove_disk(struct nvme_ns_head *head);
941 int nvme_mpath_init_identify(struct nvme_ctrl *ctrl, struct nvme_id_ctrl *id);
942 void nvme_mpath_init_ctrl(struct nvme_ctrl *ctrl);
943 void nvme_mpath_update(struct nvme_ctrl *ctrl);
944 void nvme_mpath_uninit(struct nvme_ctrl *ctrl);
945 void nvme_mpath_stop(struct nvme_ctrl *ctrl);
946 bool nvme_mpath_clear_current_path(struct nvme_ns *ns);
947 void nvme_mpath_revalidate_paths(struct nvme_ns *ns);
948 void nvme_mpath_clear_ctrl_paths(struct nvme_ctrl *ctrl);
949 void nvme_mpath_shutdown_disk(struct nvme_ns_head *head);
950 void nvme_mpath_start_request(struct request *rq);
951 void nvme_mpath_end_request(struct request *rq);
952
nvme_trace_bio_complete(struct request * req)953 static inline void nvme_trace_bio_complete(struct request *req)
954 {
955 struct nvme_ns *ns = req->q->queuedata;
956
957 if ((req->cmd_flags & REQ_NVME_MPATH) && req->bio)
958 trace_block_bio_complete(ns->head->disk->queue, req->bio);
959 }
960
961 extern bool multipath;
962 extern struct device_attribute dev_attr_ana_grpid;
963 extern struct device_attribute dev_attr_ana_state;
964 extern struct device_attribute subsys_attr_iopolicy;
965
966 #else
967 #define multipath false
nvme_ctrl_use_ana(struct nvme_ctrl * ctrl)968 static inline bool nvme_ctrl_use_ana(struct nvme_ctrl *ctrl)
969 {
970 return false;
971 }
nvme_failover_req(struct request * req)972 static inline void nvme_failover_req(struct request *req)
973 {
974 }
nvme_kick_requeue_lists(struct nvme_ctrl * ctrl)975 static inline void nvme_kick_requeue_lists(struct nvme_ctrl *ctrl)
976 {
977 }
nvme_mpath_alloc_disk(struct nvme_ctrl * ctrl,struct nvme_ns_head * head)978 static inline int nvme_mpath_alloc_disk(struct nvme_ctrl *ctrl,
979 struct nvme_ns_head *head)
980 {
981 return 0;
982 }
nvme_mpath_add_disk(struct nvme_ns * ns,__le32 anagrpid)983 static inline void nvme_mpath_add_disk(struct nvme_ns *ns, __le32 anagrpid)
984 {
985 }
nvme_mpath_remove_disk(struct nvme_ns_head * head)986 static inline void nvme_mpath_remove_disk(struct nvme_ns_head *head)
987 {
988 }
nvme_mpath_clear_current_path(struct nvme_ns * ns)989 static inline bool nvme_mpath_clear_current_path(struct nvme_ns *ns)
990 {
991 return false;
992 }
nvme_mpath_revalidate_paths(struct nvme_ns * ns)993 static inline void nvme_mpath_revalidate_paths(struct nvme_ns *ns)
994 {
995 }
nvme_mpath_clear_ctrl_paths(struct nvme_ctrl * ctrl)996 static inline void nvme_mpath_clear_ctrl_paths(struct nvme_ctrl *ctrl)
997 {
998 }
nvme_mpath_shutdown_disk(struct nvme_ns_head * head)999 static inline void nvme_mpath_shutdown_disk(struct nvme_ns_head *head)
1000 {
1001 }
nvme_trace_bio_complete(struct request * req)1002 static inline void nvme_trace_bio_complete(struct request *req)
1003 {
1004 }
nvme_mpath_init_ctrl(struct nvme_ctrl * ctrl)1005 static inline void nvme_mpath_init_ctrl(struct nvme_ctrl *ctrl)
1006 {
1007 }
nvme_mpath_init_identify(struct nvme_ctrl * ctrl,struct nvme_id_ctrl * id)1008 static inline int nvme_mpath_init_identify(struct nvme_ctrl *ctrl,
1009 struct nvme_id_ctrl *id)
1010 {
1011 if (ctrl->subsys->cmic & NVME_CTRL_CMIC_ANA)
1012 dev_warn(ctrl->device,
1013 "Please enable CONFIG_NVME_MULTIPATH for full support of multi-port devices.\n");
1014 return 0;
1015 }
nvme_mpath_update(struct nvme_ctrl * ctrl)1016 static inline void nvme_mpath_update(struct nvme_ctrl *ctrl)
1017 {
1018 }
nvme_mpath_uninit(struct nvme_ctrl * ctrl)1019 static inline void nvme_mpath_uninit(struct nvme_ctrl *ctrl)
1020 {
1021 }
nvme_mpath_stop(struct nvme_ctrl * ctrl)1022 static inline void nvme_mpath_stop(struct nvme_ctrl *ctrl)
1023 {
1024 }
nvme_mpath_unfreeze(struct nvme_subsystem * subsys)1025 static inline void nvme_mpath_unfreeze(struct nvme_subsystem *subsys)
1026 {
1027 }
nvme_mpath_wait_freeze(struct nvme_subsystem * subsys)1028 static inline void nvme_mpath_wait_freeze(struct nvme_subsystem *subsys)
1029 {
1030 }
nvme_mpath_start_freeze(struct nvme_subsystem * subsys)1031 static inline void nvme_mpath_start_freeze(struct nvme_subsystem *subsys)
1032 {
1033 }
nvme_mpath_default_iopolicy(struct nvme_subsystem * subsys)1034 static inline void nvme_mpath_default_iopolicy(struct nvme_subsystem *subsys)
1035 {
1036 }
nvme_mpath_start_request(struct request * rq)1037 static inline void nvme_mpath_start_request(struct request *rq)
1038 {
1039 }
nvme_mpath_end_request(struct request * rq)1040 static inline void nvme_mpath_end_request(struct request *rq)
1041 {
1042 }
1043 #endif /* CONFIG_NVME_MULTIPATH */
1044
1045 int nvme_revalidate_zones(struct nvme_ns *ns);
1046 int nvme_ns_report_zones(struct nvme_ns *ns, sector_t sector,
1047 unsigned int nr_zones, report_zones_cb cb, void *data);
1048 #ifdef CONFIG_BLK_DEV_ZONED
1049 int nvme_update_zone_info(struct nvme_ns *ns, unsigned lbaf);
1050 blk_status_t nvme_setup_zone_mgmt_send(struct nvme_ns *ns, struct request *req,
1051 struct nvme_command *cmnd,
1052 enum nvme_zone_mgmt_action action);
1053 #else
nvme_setup_zone_mgmt_send(struct nvme_ns * ns,struct request * req,struct nvme_command * cmnd,enum nvme_zone_mgmt_action action)1054 static inline blk_status_t nvme_setup_zone_mgmt_send(struct nvme_ns *ns,
1055 struct request *req, struct nvme_command *cmnd,
1056 enum nvme_zone_mgmt_action action)
1057 {
1058 return BLK_STS_NOTSUPP;
1059 }
1060
nvme_update_zone_info(struct nvme_ns * ns,unsigned lbaf)1061 static inline int nvme_update_zone_info(struct nvme_ns *ns, unsigned lbaf)
1062 {
1063 dev_warn(ns->ctrl->device,
1064 "Please enable CONFIG_BLK_DEV_ZONED to support ZNS devices\n");
1065 return -EPROTONOSUPPORT;
1066 }
1067 #endif
1068
nvme_get_ns_from_dev(struct device * dev)1069 static inline struct nvme_ns *nvme_get_ns_from_dev(struct device *dev)
1070 {
1071 return dev_to_disk(dev)->private_data;
1072 }
1073
1074 #ifdef CONFIG_NVME_HWMON
1075 int nvme_hwmon_init(struct nvme_ctrl *ctrl);
1076 void nvme_hwmon_exit(struct nvme_ctrl *ctrl);
1077 #else
nvme_hwmon_init(struct nvme_ctrl * ctrl)1078 static inline int nvme_hwmon_init(struct nvme_ctrl *ctrl)
1079 {
1080 return 0;
1081 }
1082
nvme_hwmon_exit(struct nvme_ctrl * ctrl)1083 static inline void nvme_hwmon_exit(struct nvme_ctrl *ctrl)
1084 {
1085 }
1086 #endif
1087
nvme_start_request(struct request * rq)1088 static inline void nvme_start_request(struct request *rq)
1089 {
1090 if (rq->cmd_flags & REQ_NVME_MPATH)
1091 nvme_mpath_start_request(rq);
1092 blk_mq_start_request(rq);
1093 }
1094
nvme_ctrl_sgl_supported(struct nvme_ctrl * ctrl)1095 static inline bool nvme_ctrl_sgl_supported(struct nvme_ctrl *ctrl)
1096 {
1097 return ctrl->sgls & ((1 << 0) | (1 << 1));
1098 }
1099
1100 #ifdef CONFIG_NVME_AUTH
1101 int __init nvme_init_auth(void);
1102 void __exit nvme_exit_auth(void);
1103 int nvme_auth_init_ctrl(struct nvme_ctrl *ctrl);
1104 void nvme_auth_stop(struct nvme_ctrl *ctrl);
1105 int nvme_auth_negotiate(struct nvme_ctrl *ctrl, int qid);
1106 int nvme_auth_wait(struct nvme_ctrl *ctrl, int qid);
1107 void nvme_auth_free(struct nvme_ctrl *ctrl);
1108 #else
nvme_auth_init_ctrl(struct nvme_ctrl * ctrl)1109 static inline int nvme_auth_init_ctrl(struct nvme_ctrl *ctrl)
1110 {
1111 return 0;
1112 }
nvme_init_auth(void)1113 static inline int __init nvme_init_auth(void)
1114 {
1115 return 0;
1116 }
nvme_exit_auth(void)1117 static inline void __exit nvme_exit_auth(void)
1118 {
1119 }
nvme_auth_stop(struct nvme_ctrl * ctrl)1120 static inline void nvme_auth_stop(struct nvme_ctrl *ctrl) {};
nvme_auth_negotiate(struct nvme_ctrl * ctrl,int qid)1121 static inline int nvme_auth_negotiate(struct nvme_ctrl *ctrl, int qid)
1122 {
1123 return -EPROTONOSUPPORT;
1124 }
nvme_auth_wait(struct nvme_ctrl * ctrl,int qid)1125 static inline int nvme_auth_wait(struct nvme_ctrl *ctrl, int qid)
1126 {
1127 return NVME_SC_AUTH_REQUIRED;
1128 }
nvme_auth_free(struct nvme_ctrl * ctrl)1129 static inline void nvme_auth_free(struct nvme_ctrl *ctrl) {};
1130 #endif
1131
1132 u32 nvme_command_effects(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
1133 u8 opcode);
1134 u32 nvme_passthru_start(struct nvme_ctrl *ctrl, struct nvme_ns *ns, u8 opcode);
1135 int nvme_execute_rq(struct request *rq, bool at_head);
1136 void nvme_passthru_end(struct nvme_ctrl *ctrl, struct nvme_ns *ns, u32 effects,
1137 struct nvme_command *cmd, int status);
1138 struct nvme_ctrl *nvme_ctrl_from_file(struct file *file);
1139 struct nvme_ns *nvme_find_get_ns(struct nvme_ctrl *ctrl, unsigned nsid);
1140 bool nvme_get_ns(struct nvme_ns *ns);
1141 void nvme_put_ns(struct nvme_ns *ns);
1142
nvme_multi_css(struct nvme_ctrl * ctrl)1143 static inline bool nvme_multi_css(struct nvme_ctrl *ctrl)
1144 {
1145 return (ctrl->ctrl_config & NVME_CC_CSS_MASK) == NVME_CC_CSS_CSI;
1146 }
1147
1148 #ifdef CONFIG_NVME_VERBOSE_ERRORS
1149 const unsigned char *nvme_get_error_status_str(u16 status);
1150 const unsigned char *nvme_get_opcode_str(u8 opcode);
1151 const unsigned char *nvme_get_admin_opcode_str(u8 opcode);
1152 const unsigned char *nvme_get_fabrics_opcode_str(u8 opcode);
1153 #else /* CONFIG_NVME_VERBOSE_ERRORS */
nvme_get_error_status_str(u16 status)1154 static inline const unsigned char *nvme_get_error_status_str(u16 status)
1155 {
1156 return "I/O Error";
1157 }
nvme_get_opcode_str(u8 opcode)1158 static inline const unsigned char *nvme_get_opcode_str(u8 opcode)
1159 {
1160 return "I/O Cmd";
1161 }
nvme_get_admin_opcode_str(u8 opcode)1162 static inline const unsigned char *nvme_get_admin_opcode_str(u8 opcode)
1163 {
1164 return "Admin Cmd";
1165 }
1166
nvme_get_fabrics_opcode_str(u8 opcode)1167 static inline const unsigned char *nvme_get_fabrics_opcode_str(u8 opcode)
1168 {
1169 return "Fabrics Cmd";
1170 }
1171 #endif /* CONFIG_NVME_VERBOSE_ERRORS */
1172
nvme_opcode_str(int qid,u8 opcode,u8 fctype)1173 static inline const unsigned char *nvme_opcode_str(int qid, u8 opcode, u8 fctype)
1174 {
1175 if (opcode == nvme_fabrics_command)
1176 return nvme_get_fabrics_opcode_str(fctype);
1177 return qid ? nvme_get_opcode_str(opcode) :
1178 nvme_get_admin_opcode_str(opcode);
1179 }
1180 #endif /* _NVME_H */
1181