?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
tests/acpi: allow expected files change
[qemu/ar7.git] / hw / block / nvme.c
blob01b657b1c5e27fad73627834e1d082f5493dadb4
1 /*
2 * QEMU NVM Express Controller
3 *
4 * Copyright (c) 2012, Intel Corporation
5 *
6 * Written by Keith Busch <keith.busch@intel.com>
7 *
8 * This code is licensed under the GNU GPL v2 or later.
9 */
10
11 /**
12 * Reference Specs: http://www.nvmexpress.org, 1.2, 1.1, 1.0e
13 *
14 * https://nvmexpress.org/developers/nvme-specification/
15 */
16
17 /**
18 * Usage: add options:
19 * -drive file=<file>,if=none,id=<drive_id>
20 * -device nvme,serial=<serial>,id=<bus_name>, \
21 * cmb_size_mb=<cmb_size_mb[optional]>, \
22 * [pmrdev=<mem_backend_file_id>,] \
23 * max_ioqpairs=<N[optional]>, \
24 * aerl=<N[optional]>, aer_max_queued=<N[optional]>, \
25 * mdts=<N[optional]>
26 * -device nvme-ns,drive=<drive_id>,bus=bus_name,nsid=<nsid>
27 *
28 * Note cmb_size_mb denotes size of CMB in MB. CMB is assumed to be at
29 * offset 0 in BAR2 and supports only WDS, RDS and SQS for now.
30 *
31 * cmb_size_mb= and pmrdev= options are mutually exclusive due to limitation
32 * in available BAR's. cmb_size_mb= will take precedence over pmrdev= when
33 * both provided.
34 * Enabling pmr emulation can be achieved by pointing to memory-backend-file.
35 * For example:
36 * -object memory-backend-file,id=<mem_id>,share=on,mem-path=<file_path>, \
37 * size=<size> .... -device nvme,...,pmrdev=<mem_id>
38 *
39 *
40 * nvme device parameters
41 * ~~~~~~~~~~~~~~~~~~~~~~
42 * - `aerl`
43 * The Asynchronous Event Request Limit (AERL). Indicates the maximum number
44 * of concurrently outstanding Asynchronous Event Request commands suppoert
45 * by the controller. This is a 0's based value.
46 *
47 * - `aer_max_queued`
48 * This is the maximum number of events that the device will enqueue for
49 * completion when there are no oustanding AERs. When the maximum number of
50 * enqueued events are reached, subsequent events will be dropped.
51 *
52 */
53
54 #include "qemu/osdep.h"
55 #include "qemu/units.h"
56 #include "qemu/error-report.h"
57 #include "hw/block/block.h"
58 #include "hw/pci/msix.h"
59 #include "hw/pci/pci.h"
60 #include "hw/qdev-properties.h"
61 #include "migration/vmstate.h"
62 #include "sysemu/sysemu.h"
63 #include "qapi/error.h"
64 #include "qapi/visitor.h"
65 #include "sysemu/hostmem.h"
66 #include "sysemu/block-backend.h"
67 #include "exec/memory.h"
68 #include "qemu/log.h"
69 #include "qemu/module.h"
70 #include "qemu/cutils.h"
71 #include "trace.h"
72 #include "nvme.h"
73 #include "nvme-ns.h"
74
75 #define NVME_MAX_IOQPAIRS 0xffff
76 #define NVME_DB_SIZE 4
77 #define NVME_SPEC_VER 0x00010300
78 #define NVME_CMB_BIR 2
79 #define NVME_PMR_BIR 2
80 #define NVME_TEMPERATURE 0x143
81 #define NVME_TEMPERATURE_WARNING 0x157
82 #define NVME_TEMPERATURE_CRITICAL 0x175
83 #define NVME_NUM_FW_SLOTS 1
84
85 #define NVME_GUEST_ERR(trace, fmt, ...) \
86 do { \
87 (trace_##trace)(__VA_ARGS__); \
88 qemu_log_mask(LOG_GUEST_ERROR, #trace \
89 " in %s: " fmt "\n", __func__, ## __VA_ARGS__); \
90 } while (0)
91
92 static const bool nvme_feature_support[NVME_FID_MAX] = {
93 [NVME_ARBITRATION] = true,
94 [NVME_POWER_MANAGEMENT] = true,
95 [NVME_TEMPERATURE_THRESHOLD] = true,
96 [NVME_ERROR_RECOVERY] = true,
97 [NVME_VOLATILE_WRITE_CACHE] = true,
98 [NVME_NUMBER_OF_QUEUES] = true,
99 [NVME_INTERRUPT_COALESCING] = true,
100 [NVME_INTERRUPT_VECTOR_CONF] = true,
101 [NVME_WRITE_ATOMICITY] = true,
102 [NVME_ASYNCHRONOUS_EVENT_CONF] = true,
103 [NVME_TIMESTAMP] = true,
104 };
105
106 static const uint32_t nvme_feature_cap[NVME_FID_MAX] = {
107 [NVME_TEMPERATURE_THRESHOLD] = NVME_FEAT_CAP_CHANGE,
108 [NVME_VOLATILE_WRITE_CACHE] = NVME_FEAT_CAP_CHANGE,
109 [NVME_NUMBER_OF_QUEUES] = NVME_FEAT_CAP_CHANGE,
110 [NVME_ASYNCHRONOUS_EVENT_CONF] = NVME_FEAT_CAP_CHANGE,
111 [NVME_TIMESTAMP] = NVME_FEAT_CAP_CHANGE,
112 };
113
114 static void nvme_process_sq(void *opaque);
115
116 static uint16_t nvme_cid(NvmeRequest *req)
117 {
118 if (!req) {
119 return 0xffff;
120 }
121
122 return le16_to_cpu(req->cqe.cid);
123 }
124
125 static uint16_t nvme_sqid(NvmeRequest *req)
126 {
127 return le16_to_cpu(req->sq->sqid);
128 }
129
130 static bool nvme_addr_is_cmb(NvmeCtrl *n, hwaddr addr)
131 {
132 hwaddr low = n->ctrl_mem.addr;
133 hwaddr hi = n->ctrl_mem.addr + int128_get64(n->ctrl_mem.size);
134
135 return addr >= low && addr < hi;
136 }
137
138 static inline void *nvme_addr_to_cmb(NvmeCtrl *n, hwaddr addr)
139 {
140 assert(nvme_addr_is_cmb(n, addr));
141
142 return &n->cmbuf[addr - n->ctrl_mem.addr];
143 }
144
145 static int nvme_addr_read(NvmeCtrl *n, hwaddr addr, void *buf, int size)
146 {
147 hwaddr hi = addr + size - 1;
148 if (hi < addr) {
149 return 1;
150 }
151
152 if (n->bar.cmbsz && nvme_addr_is_cmb(n, addr) && nvme_addr_is_cmb(n, hi)) {
153 memcpy(buf, nvme_addr_to_cmb(n, addr), size);
154 return 0;
155 }
156
157 return pci_dma_read(&n->parent_obj, addr, buf, size);
158 }
159
160 static bool nvme_nsid_valid(NvmeCtrl *n, uint32_t nsid)
161 {
162 return nsid && (nsid == NVME_NSID_BROADCAST || nsid <= n->num_namespaces);
163 }
164
165 static int nvme_check_sqid(NvmeCtrl *n, uint16_t sqid)
166 {
167 return sqid < n->params.max_ioqpairs + 1 && n->sq[sqid] != NULL ? 0 : -1;
168 }
169
170 static int nvme_check_cqid(NvmeCtrl *n, uint16_t cqid)
171 {
172 return cqid < n->params.max_ioqpairs + 1 && n->cq[cqid] != NULL ? 0 : -1;
173 }
174
175 static void nvme_inc_cq_tail(NvmeCQueue *cq)
176 {
177 cq->tail++;
178 if (cq->tail >= cq->size) {
179 cq->tail = 0;
180 cq->phase = !cq->phase;
181 }
182 }
183
184 static void nvme_inc_sq_head(NvmeSQueue *sq)
185 {
186 sq->head = (sq->head + 1) % sq->size;
187 }
188
189 static uint8_t nvme_cq_full(NvmeCQueue *cq)
190 {
191 return (cq->tail + 1) % cq->size == cq->head;
192 }
193
194 static uint8_t nvme_sq_empty(NvmeSQueue *sq)
195 {
196 return sq->head == sq->tail;
197 }
198
199 static void nvme_irq_check(NvmeCtrl *n)
200 {
201 if (msix_enabled(&(n->parent_obj))) {
202 return;
203 }
204 if (~n->bar.intms & n->irq_status) {
205 pci_irq_assert(&n->parent_obj);
206 } else {
207 pci_irq_deassert(&n->parent_obj);
208 }
209 }
210
211 static void nvme_irq_assert(NvmeCtrl *n, NvmeCQueue *cq)
212 {
213 if (cq->irq_enabled) {
214 if (msix_enabled(&(n->parent_obj))) {
215 trace_pci_nvme_irq_msix(cq->vector);
216 msix_notify(&(n->parent_obj), cq->vector);
217 } else {
218 trace_pci_nvme_irq_pin();
219 assert(cq->vector < 32);
220 n->irq_status |= 1 << cq->vector;
221 nvme_irq_check(n);
222 }
223 } else {
224 trace_pci_nvme_irq_masked();
225 }
226 }
227
228 static void nvme_irq_deassert(NvmeCtrl *n, NvmeCQueue *cq)
229 {
230 if (cq->irq_enabled) {
231 if (msix_enabled(&(n->parent_obj))) {
232 return;
233 } else {
234 assert(cq->vector < 32);
235 n->irq_status &= ~(1 << cq->vector);
236 nvme_irq_check(n);
237 }
238 }
239 }
240
241 static void nvme_req_clear(NvmeRequest *req)
242 {
243 req->ns = NULL;
244 memset(&req->cqe, 0x0, sizeof(req->cqe));
245 req->status = NVME_SUCCESS;
246 }
247
248 static void nvme_req_exit(NvmeRequest *req)
249 {
250 if (req->qsg.sg) {
251 qemu_sglist_destroy(&req->qsg);
252 }
253
254 if (req->iov.iov) {
255 qemu_iovec_destroy(&req->iov);
256 }
257 }
258
259 static uint16_t nvme_map_addr_cmb(NvmeCtrl *n, QEMUIOVector *iov, hwaddr addr,
260 size_t len)
261 {
262 if (!len) {
263 return NVME_SUCCESS;
264 }
265
266 trace_pci_nvme_map_addr_cmb(addr, len);
267
268 if (!nvme_addr_is_cmb(n, addr) || !nvme_addr_is_cmb(n, addr + len - 1)) {
269 return NVME_DATA_TRAS_ERROR;
270 }
271
272 qemu_iovec_add(iov, nvme_addr_to_cmb(n, addr), len);
273
274 return NVME_SUCCESS;
275 }
276
277 static uint16_t nvme_map_addr(NvmeCtrl *n, QEMUSGList *qsg, QEMUIOVector *iov,
278 hwaddr addr, size_t len)
279 {
280 if (!len) {
281 return NVME_SUCCESS;
282 }
283
284 trace_pci_nvme_map_addr(addr, len);
285
286 if (nvme_addr_is_cmb(n, addr)) {
287 if (qsg && qsg->sg) {
288 return NVME_INVALID_USE_OF_CMB | NVME_DNR;
289 }
290
291 assert(iov);
292
293 if (!iov->iov) {
294 qemu_iovec_init(iov, 1);
295 }
296
297 return nvme_map_addr_cmb(n, iov, addr, len);
298 }
299
300 if (iov && iov->iov) {
301 return NVME_INVALID_USE_OF_CMB | NVME_DNR;
302 }
303
304 assert(qsg);
305
306 if (!qsg->sg) {
307 pci_dma_sglist_init(qsg, &n->parent_obj, 1);
308 }
309
310 qemu_sglist_add(qsg, addr, len);
311
312 return NVME_SUCCESS;
313 }
314
315 static uint16_t nvme_map_prp(NvmeCtrl *n, uint64_t prp1, uint64_t prp2,
316 uint32_t len, NvmeRequest *req)
317 {
318 hwaddr trans_len = n->page_size - (prp1 % n->page_size);
319 trans_len = MIN(len, trans_len);
320 int num_prps = (len >> n->page_bits) + 1;
321 uint16_t status;
322 bool prp_list_in_cmb = false;
323 int ret;
324
325 QEMUSGList *qsg = &req->qsg;
326 QEMUIOVector *iov = &req->iov;
327
328 trace_pci_nvme_map_prp(trans_len, len, prp1, prp2, num_prps);
329
330 if (nvme_addr_is_cmb(n, prp1)) {
331 qemu_iovec_init(iov, num_prps);
332 } else {
333 pci_dma_sglist_init(qsg, &n->parent_obj, num_prps);
334 }
335
336 status = nvme_map_addr(n, qsg, iov, prp1, trans_len);
337 if (status) {
338 return status;
339 }
340
341 len -= trans_len;
342 if (len) {
343 if (len > n->page_size) {
344 uint64_t prp_list[n->max_prp_ents];
345 uint32_t nents, prp_trans;
346 int i = 0;
347
348 if (nvme_addr_is_cmb(n, prp2)) {
349 prp_list_in_cmb = true;
350 }
351
352 nents = (len + n->page_size - 1) >> n->page_bits;
353 prp_trans = MIN(n->max_prp_ents, nents) * sizeof(uint64_t);
354 ret = nvme_addr_read(n, prp2, (void *)prp_list, prp_trans);
355 if (ret) {
356 trace_pci_nvme_err_addr_read(prp2);
357 return NVME_DATA_TRAS_ERROR;
358 }
359 while (len != 0) {
360 uint64_t prp_ent = le64_to_cpu(prp_list[i]);
361
362 if (i == n->max_prp_ents - 1 && len > n->page_size) {
363 if (unlikely(prp_ent & (n->page_size - 1))) {
364 trace_pci_nvme_err_invalid_prplist_ent(prp_ent);
365 return NVME_INVALID_PRP_OFFSET | NVME_DNR;
366 }
367
368 if (prp_list_in_cmb != nvme_addr_is_cmb(n, prp_ent)) {
369 return NVME_INVALID_USE_OF_CMB | NVME_DNR;
370 }
371
372 i = 0;
373 nents = (len + n->page_size - 1) >> n->page_bits;
374 prp_trans = MIN(n->max_prp_ents, nents) * sizeof(uint64_t);
375 ret = nvme_addr_read(n, prp_ent, (void *)prp_list,
376 prp_trans);
377 if (ret) {
378 trace_pci_nvme_err_addr_read(prp_ent);
379 return NVME_DATA_TRAS_ERROR;
380 }
381 prp_ent = le64_to_cpu(prp_list[i]);
382 }
383
384 if (unlikely(prp_ent & (n->page_size - 1))) {
385 trace_pci_nvme_err_invalid_prplist_ent(prp_ent);
386 return NVME_INVALID_PRP_OFFSET | NVME_DNR;
387 }
388
389 trans_len = MIN(len, n->page_size);
390 status = nvme_map_addr(n, qsg, iov, prp_ent, trans_len);
391 if (status) {
392 return status;
393 }
394
395 len -= trans_len;
396 i++;
397 }
398 } else {
399 if (unlikely(prp2 & (n->page_size - 1))) {
400 trace_pci_nvme_err_invalid_prp2_align(prp2);
401 return NVME_INVALID_PRP_OFFSET | NVME_DNR;
402 }
403 status = nvme_map_addr(n, qsg, iov, prp2, len);
404 if (status) {
405 return status;
406 }
407 }
408 }
409
410 return NVME_SUCCESS;
411 }
412
413 /*
414 * Map 'nsgld' data descriptors from 'segment'. The function will subtract the
415 * number of bytes mapped in len.
416 */
417 static uint16_t nvme_map_sgl_data(NvmeCtrl *n, QEMUSGList *qsg,
418 QEMUIOVector *iov,
419 NvmeSglDescriptor *segment, uint64_t nsgld,
420 size_t *len, NvmeRequest *req)
421 {
422 dma_addr_t addr, trans_len;
423 uint32_t dlen;
424 uint16_t status;
425
426 for (int i = 0; i < nsgld; i++) {
427 uint8_t type = NVME_SGL_TYPE(segment[i].type);
428
429 switch (type) {
430 case NVME_SGL_DESCR_TYPE_BIT_BUCKET:
431 if (req->cmd.opcode == NVME_CMD_WRITE) {
432 continue;
433 }
434 case NVME_SGL_DESCR_TYPE_DATA_BLOCK:
435 break;
436 case NVME_SGL_DESCR_TYPE_SEGMENT:
437 case NVME_SGL_DESCR_TYPE_LAST_SEGMENT:
438 return NVME_INVALID_NUM_SGL_DESCRS | NVME_DNR;
439 default:
440 return NVME_SGL_DESCR_TYPE_INVALID | NVME_DNR;
441 }
442
443 dlen = le32_to_cpu(segment[i].len);
444
445 if (!dlen) {
446 continue;
447 }
448
449 if (*len == 0) {
450 /*
451 * All data has been mapped, but the SGL contains additional
452 * segments and/or descriptors. The controller might accept
453 * ignoring the rest of the SGL.
454 */
455 uint32_t sgls = le32_to_cpu(n->id_ctrl.sgls);
456 if (sgls & NVME_CTRL_SGLS_EXCESS_LENGTH) {
457 break;
458 }
459
460 trace_pci_nvme_err_invalid_sgl_excess_length(nvme_cid(req));
461 return NVME_DATA_SGL_LEN_INVALID | NVME_DNR;
462 }
463
464 trans_len = MIN(*len, dlen);
465
466 if (type == NVME_SGL_DESCR_TYPE_BIT_BUCKET) {
467 goto next;
468 }
469
470 addr = le64_to_cpu(segment[i].addr);
471
472 if (UINT64_MAX - addr < dlen) {
473 return NVME_DATA_SGL_LEN_INVALID | NVME_DNR;
474 }
475
476 status = nvme_map_addr(n, qsg, iov, addr, trans_len);
477 if (status) {
478 return status;
479 }
480
481 next:
482 *len -= trans_len;
483 }
484
485 return NVME_SUCCESS;
486 }
487
488 static uint16_t nvme_map_sgl(NvmeCtrl *n, QEMUSGList *qsg, QEMUIOVector *iov,
489 NvmeSglDescriptor sgl, size_t len,
490 NvmeRequest *req)
491 {
492 /*
493 * Read the segment in chunks of 256 descriptors (one 4k page) to avoid
494 * dynamically allocating a potentially huge SGL. The spec allows the SGL
495 * to be larger (as in number of bytes required to describe the SGL
496 * descriptors and segment chain) than the command transfer size, so it is
497 * not bounded by MDTS.
498 */
499 const int SEG_CHUNK_SIZE = 256;
500
501 NvmeSglDescriptor segment[SEG_CHUNK_SIZE], *sgld, *last_sgld;
502 uint64_t nsgld;
503 uint32_t seg_len;
504 uint16_t status;
505 bool sgl_in_cmb = false;
506 hwaddr addr;
507 int ret;
508
509 sgld = &sgl;
510 addr = le64_to_cpu(sgl.addr);
511
512 trace_pci_nvme_map_sgl(nvme_cid(req), NVME_SGL_TYPE(sgl.type), len);
513
514 /*
515 * If the entire transfer can be described with a single data block it can
516 * be mapped directly.
517 */
518 if (NVME_SGL_TYPE(sgl.type) == NVME_SGL_DESCR_TYPE_DATA_BLOCK) {
519 status = nvme_map_sgl_data(n, qsg, iov, sgld, 1, &len, req);
520 if (status) {
521 goto unmap;
522 }
523
524 goto out;
525 }
526
527 /*
528 * If the segment is located in the CMB, the submission queue of the
529 * request must also reside there.
530 */
531 if (nvme_addr_is_cmb(n, addr)) {
532 if (!nvme_addr_is_cmb(n, req->sq->dma_addr)) {
533 return NVME_INVALID_USE_OF_CMB | NVME_DNR;
534 }
535
536 sgl_in_cmb = true;
537 }
538
539 for (;;) {
540 switch (NVME_SGL_TYPE(sgld->type)) {
541 case NVME_SGL_DESCR_TYPE_SEGMENT:
542 case NVME_SGL_DESCR_TYPE_LAST_SEGMENT:
543 break;
544 default:
545 return NVME_INVALID_SGL_SEG_DESCR | NVME_DNR;
546 }
547
548 seg_len = le32_to_cpu(sgld->len);
549
550 /* check the length of the (Last) Segment descriptor */
551 if ((!seg_len || seg_len & 0xf) &&
552 (NVME_SGL_TYPE(sgld->type) != NVME_SGL_DESCR_TYPE_BIT_BUCKET)) {
553 return NVME_INVALID_SGL_SEG_DESCR | NVME_DNR;
554 }
555
556 if (UINT64_MAX - addr < seg_len) {
557 return NVME_DATA_SGL_LEN_INVALID | NVME_DNR;
558 }
559
560 nsgld = seg_len / sizeof(NvmeSglDescriptor);
561
562 while (nsgld > SEG_CHUNK_SIZE) {
563 if (nvme_addr_read(n, addr, segment, sizeof(segment))) {
564 trace_pci_nvme_err_addr_read(addr);
565 status = NVME_DATA_TRAS_ERROR;
566 goto unmap;
567 }
568
569 status = nvme_map_sgl_data(n, qsg, iov, segment, SEG_CHUNK_SIZE,
570 &len, req);
571 if (status) {
572 goto unmap;
573 }
574
575 nsgld -= SEG_CHUNK_SIZE;
576 addr += SEG_CHUNK_SIZE * sizeof(NvmeSglDescriptor);
577 }
578
579 ret = nvme_addr_read(n, addr, segment, nsgld *
580 sizeof(NvmeSglDescriptor));
581 if (ret) {
582 trace_pci_nvme_err_addr_read(addr);
583 status = NVME_DATA_TRAS_ERROR;
584 goto unmap;
585 }
586
587 last_sgld = &segment[nsgld - 1];
588
589 /*
590 * If the segment ends with a Data Block or Bit Bucket Descriptor Type,
591 * then we are done.
592 */
593 switch (NVME_SGL_TYPE(last_sgld->type)) {
594 case NVME_SGL_DESCR_TYPE_DATA_BLOCK:
595 case NVME_SGL_DESCR_TYPE_BIT_BUCKET:
596 status = nvme_map_sgl_data(n, qsg, iov, segment, nsgld, &len, req);
597 if (status) {
598 goto unmap;
599 }
600
601 goto out;
602
603 default:
604 break;
605 }
606
607 /*
608 * If the last descriptor was not a Data Block or Bit Bucket, then the
609 * current segment must not be a Last Segment.
610 */
611 if (NVME_SGL_TYPE(sgld->type) == NVME_SGL_DESCR_TYPE_LAST_SEGMENT) {
612 status = NVME_INVALID_SGL_SEG_DESCR | NVME_DNR;
613 goto unmap;
614 }
615
616 sgld = last_sgld;
617 addr = le64_to_cpu(sgld->addr);
618
619 /*
620 * Do not map the last descriptor; it will be a Segment or Last Segment
621 * descriptor and is handled by the next iteration.
622 */
623 status = nvme_map_sgl_data(n, qsg, iov, segment, nsgld - 1, &len, req);
624 if (status) {
625 goto unmap;
626 }
627
628 /*
629 * If the next segment is in the CMB, make sure that the sgl was
630 * already located there.
631 */
632 if (sgl_in_cmb != nvme_addr_is_cmb(n, addr)) {
633 status = NVME_INVALID_USE_OF_CMB | NVME_DNR;
634 goto unmap;
635 }
636 }
637
638 out:
639 /* if there is any residual left in len, the SGL was too short */
640 if (len) {
641 status = NVME_DATA_SGL_LEN_INVALID | NVME_DNR;
642 goto unmap;
643 }
644
645 return NVME_SUCCESS;
646
647 unmap:
648 if (iov->iov) {
649 qemu_iovec_destroy(iov);
650 }
651
652 if (qsg->sg) {
653 qemu_sglist_destroy(qsg);
654 }
655
656 return status;
657 }
658
659 static uint16_t nvme_map_dptr(NvmeCtrl *n, size_t len, NvmeRequest *req)
660 {
661 uint64_t prp1, prp2;
662
663 switch (NVME_CMD_FLAGS_PSDT(req->cmd.flags)) {
664 case NVME_PSDT_PRP:
665 prp1 = le64_to_cpu(req->cmd.dptr.prp1);
666 prp2 = le64_to_cpu(req->cmd.dptr.prp2);
667
668 return nvme_map_prp(n, prp1, prp2, len, req);
669 case NVME_PSDT_SGL_MPTR_CONTIGUOUS:
670 case NVME_PSDT_SGL_MPTR_SGL:
671 /* SGLs shall not be used for Admin commands in NVMe over PCIe */
672 if (!req->sq->sqid) {
673 return NVME_INVALID_FIELD | NVME_DNR;
674 }
675
676 return nvme_map_sgl(n, &req->qsg, &req->iov, req->cmd.dptr.sgl, len,
677 req);
678 default:
679 return NVME_INVALID_FIELD;
680 }
681 }
682
683 static uint16_t nvme_dma(NvmeCtrl *n, uint8_t *ptr, uint32_t len,
684 DMADirection dir, NvmeRequest *req)
685 {
686 uint16_t status = NVME_SUCCESS;
687
688 status = nvme_map_dptr(n, len, req);
689 if (status) {
690 return status;
691 }
692
693 /* assert that only one of qsg and iov carries data */
694 assert((req->qsg.nsg > 0) != (req->iov.niov > 0));
695
696 if (req->qsg.nsg > 0) {
697 uint64_t residual;
698
699 if (dir == DMA_DIRECTION_TO_DEVICE) {
700 residual = dma_buf_write(ptr, len, &req->qsg);
701 } else {
702 residual = dma_buf_read(ptr, len, &req->qsg);
703 }
704
705 if (unlikely(residual)) {
706 trace_pci_nvme_err_invalid_dma();
707 status = NVME_INVALID_FIELD | NVME_DNR;
708 }
709 } else {
710 size_t bytes;
711
712 if (dir == DMA_DIRECTION_TO_DEVICE) {
713 bytes = qemu_iovec_to_buf(&req->iov, 0, ptr, len);
714 } else {
715 bytes = qemu_iovec_from_buf(&req->iov, 0, ptr, len);
716 }
717
718 if (unlikely(bytes != len)) {
719 trace_pci_nvme_err_invalid_dma();
720 status = NVME_INVALID_FIELD | NVME_DNR;
721 }
722 }
723
724 return status;
725 }
726
727 static void nvme_post_cqes(void *opaque)
728 {
729 NvmeCQueue *cq = opaque;
730 NvmeCtrl *n = cq->ctrl;
731 NvmeRequest *req, *next;
732 int ret;
733
734 QTAILQ_FOREACH_SAFE(req, &cq->req_list, entry, next) {
735 NvmeSQueue *sq;
736 hwaddr addr;
737
738 if (nvme_cq_full(cq)) {
739 break;
740 }
741
742 sq = req->sq;
743 req->cqe.status = cpu_to_le16((req->status << 1) | cq->phase);
744 req->cqe.sq_id = cpu_to_le16(sq->sqid);
745 req->cqe.sq_head = cpu_to_le16(sq->head);
746 addr = cq->dma_addr + cq->tail * n->cqe_size;
747 ret = pci_dma_write(&n->parent_obj, addr, (void *)&req->cqe,
748 sizeof(req->cqe));
749 if (ret) {
750 trace_pci_nvme_err_addr_write(addr);
751 trace_pci_nvme_err_cfs();
752 n->bar.csts = NVME_CSTS_FAILED;
753 break;
754 }
755 QTAILQ_REMOVE(&cq->req_list, req, entry);
756 nvme_inc_cq_tail(cq);
757 nvme_req_exit(req);
758 QTAILQ_INSERT_TAIL(&sq->req_list, req, entry);
759 }
760 if (cq->tail != cq->head) {
761 nvme_irq_assert(n, cq);
762 }
763 }
764
765 static void nvme_enqueue_req_completion(NvmeCQueue *cq, NvmeRequest *req)
766 {
767 assert(cq->cqid == req->sq->cqid);
768 trace_pci_nvme_enqueue_req_completion(nvme_cid(req), cq->cqid,
769 req->status);
770
771 if (req->status) {
772 trace_pci_nvme_err_req_status(nvme_cid(req), nvme_nsid(req->ns),
773 req->status, req->cmd.opcode);
774 }
775
776 QTAILQ_REMOVE(&req->sq->out_req_list, req, entry);
777 QTAILQ_INSERT_TAIL(&cq->req_list, req, entry);
778 timer_mod(cq->timer, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + 500);
779 }
780
781 static void nvme_process_aers(void *opaque)
782 {
783 NvmeCtrl *n = opaque;
784 NvmeAsyncEvent *event, *next;
785
786 trace_pci_nvme_process_aers(n->aer_queued);
787
788 QTAILQ_FOREACH_SAFE(event, &n->aer_queue, entry, next) {
789 NvmeRequest *req;
790 NvmeAerResult *result;
791
792 /* can't post cqe if there is nothing to complete */
793 if (!n->outstanding_aers) {
794 trace_pci_nvme_no_outstanding_aers();
795 break;
796 }
797
798 /* ignore if masked (cqe posted, but event not cleared) */
799 if (n->aer_mask & (1 << event->result.event_type)) {
800 trace_pci_nvme_aer_masked(event->result.event_type, n->aer_mask);
801 continue;
802 }
803
804 QTAILQ_REMOVE(&n->aer_queue, event, entry);
805 n->aer_queued--;
806
807 n->aer_mask |= 1 << event->result.event_type;
808 n->outstanding_aers--;
809
810 req = n->aer_reqs[n->outstanding_aers];
811
812 result = (NvmeAerResult *) &req->cqe.result;
813 result->event_type = event->result.event_type;
814 result->event_info = event->result.event_info;
815 result->log_page = event->result.log_page;
816 g_free(event);
817
818 trace_pci_nvme_aer_post_cqe(result->event_type, result->event_info,
819 result->log_page);
820
821 nvme_enqueue_req_completion(&n->admin_cq, req);
822 }
823 }
824
825 static void nvme_enqueue_event(NvmeCtrl *n, uint8_t event_type,
826 uint8_t event_info, uint8_t log_page)
827 {
828 NvmeAsyncEvent *event;
829
830 trace_pci_nvme_enqueue_event(event_type, event_info, log_page);
831
832 if (n->aer_queued == n->params.aer_max_queued) {
833 trace_pci_nvme_enqueue_event_noqueue(n->aer_queued);
834 return;
835 }
836
837 event = g_new(NvmeAsyncEvent, 1);
838 event->result = (NvmeAerResult) {
839 .event_type = event_type,
840 .event_info = event_info,
841 .log_page = log_page,
842 };
843
844 QTAILQ_INSERT_TAIL(&n->aer_queue, event, entry);
845 n->aer_queued++;
846
847 nvme_process_aers(n);
848 }
849
850 static void nvme_clear_events(NvmeCtrl *n, uint8_t event_type)
851 {
852 n->aer_mask &= ~(1 << event_type);
853 if (!QTAILQ_EMPTY(&n->aer_queue)) {
854 nvme_process_aers(n);
855 }
856 }
857
858 static inline uint16_t nvme_check_mdts(NvmeCtrl *n, size_t len)
859 {
860 uint8_t mdts = n->params.mdts;
861
862 if (mdts && len > n->page_size << mdts) {
863 return NVME_INVALID_FIELD | NVME_DNR;
864 }
865
866 return NVME_SUCCESS;
867 }
868
869 static inline uint16_t nvme_check_bounds(NvmeCtrl *n, NvmeNamespace *ns,
870 uint64_t slba, uint32_t nlb)
871 {
872 uint64_t nsze = le64_to_cpu(ns->id_ns.nsze);
873
874 if (unlikely(UINT64_MAX - slba < nlb || slba + nlb > nsze)) {
875 return NVME_LBA_RANGE | NVME_DNR;
876 }
877
878 return NVME_SUCCESS;
879 }
880
881 static void nvme_rw_cb(void *opaque, int ret)
882 {
883 NvmeRequest *req = opaque;
884 NvmeNamespace *ns = req->ns;
885
886 BlockBackend *blk = ns->blkconf.blk;
887 BlockAcctCookie *acct = &req->acct;
888 BlockAcctStats *stats = blk_get_stats(blk);
889
890 Error *local_err = NULL;
891
892 trace_pci_nvme_rw_cb(nvme_cid(req), blk_name(blk));
893
894 if (!ret) {
895 block_acct_done(stats, acct);
896 } else {
897 uint16_t status;
898
899 block_acct_failed(stats, acct);
900
901 switch (req->cmd.opcode) {
902 case NVME_CMD_READ:
903 status = NVME_UNRECOVERED_READ;
904 break;
905 case NVME_CMD_FLUSH:
906 case NVME_CMD_WRITE:
907 case NVME_CMD_WRITE_ZEROES:
908 status = NVME_WRITE_FAULT;
909 break;
910 default:
911 status = NVME_INTERNAL_DEV_ERROR;
912 break;
913 }
914
915 trace_pci_nvme_err_aio(nvme_cid(req), strerror(ret), status);
916
917 error_setg_errno(&local_err, -ret, "aio failed");
918 error_report_err(local_err);
919
920 req->status = status;
921 }
922
923 nvme_enqueue_req_completion(nvme_cq(req), req);
924 }
925
926 static uint16_t nvme_flush(NvmeCtrl *n, NvmeRequest *req)
927 {
928 block_acct_start(blk_get_stats(req->ns->blkconf.blk), &req->acct, 0,
929 BLOCK_ACCT_FLUSH);
930 req->aiocb = blk_aio_flush(req->ns->blkconf.blk, nvme_rw_cb, req);
931 return NVME_NO_COMPLETE;
932 }
933
934 static uint16_t nvme_write_zeroes(NvmeCtrl *n, NvmeRequest *req)
935 {
936 NvmeRwCmd *rw = (NvmeRwCmd *)&req->cmd;
937 NvmeNamespace *ns = req->ns;
938 uint64_t slba = le64_to_cpu(rw->slba);
939 uint32_t nlb = (uint32_t)le16_to_cpu(rw->nlb) + 1;
940 uint64_t offset = nvme_l2b(ns, slba);
941 uint32_t count = nvme_l2b(ns, nlb);
942 uint16_t status;
943
944 trace_pci_nvme_write_zeroes(nvme_cid(req), nvme_nsid(ns), slba, nlb);
945
946 status = nvme_check_bounds(n, ns, slba, nlb);
947 if (status) {
948 trace_pci_nvme_err_invalid_lba_range(slba, nlb, ns->id_ns.nsze);
949 return status;
950 }
951
952 block_acct_start(blk_get_stats(req->ns->blkconf.blk), &req->acct, 0,
953 BLOCK_ACCT_WRITE);
954 req->aiocb = blk_aio_pwrite_zeroes(req->ns->blkconf.blk, offset, count,
955 BDRV_REQ_MAY_UNMAP, nvme_rw_cb, req);
956 return NVME_NO_COMPLETE;
957 }
958
959 static uint16_t nvme_rw(NvmeCtrl *n, NvmeRequest *req)
960 {
961 NvmeRwCmd *rw = (NvmeRwCmd *)&req->cmd;
962 NvmeNamespace *ns = req->ns;
963 uint32_t nlb = (uint32_t)le16_to_cpu(rw->nlb) + 1;
964 uint64_t slba = le64_to_cpu(rw->slba);
965
966 uint64_t data_size = nvme_l2b(ns, nlb);
967 uint64_t data_offset = nvme_l2b(ns, slba);
968 enum BlockAcctType acct = req->cmd.opcode == NVME_CMD_WRITE ?
969 BLOCK_ACCT_WRITE : BLOCK_ACCT_READ;
970 BlockBackend *blk = ns->blkconf.blk;
971 uint16_t status;
972
973 trace_pci_nvme_rw(nvme_cid(req), nvme_io_opc_str(rw->opcode),
974 nvme_nsid(ns), nlb, data_size, slba);
975
976 status = nvme_check_mdts(n, data_size);
977 if (status) {
978 trace_pci_nvme_err_mdts(nvme_cid(req), data_size);
979 goto invalid;
980 }
981
982 status = nvme_check_bounds(n, ns, slba, nlb);
983 if (status) {
984 trace_pci_nvme_err_invalid_lba_range(slba, nlb, ns->id_ns.nsze);
985 goto invalid;
986 }
987
988 status = nvme_map_dptr(n, data_size, req);
989 if (status) {
990 goto invalid;
991 }
992
993 block_acct_start(blk_get_stats(blk), &req->acct, data_size, acct);
994 if (req->qsg.sg) {
995 if (acct == BLOCK_ACCT_WRITE) {
996 req->aiocb = dma_blk_write(blk, &req->qsg, data_offset,
997 BDRV_SECTOR_SIZE, nvme_rw_cb, req);
998 } else {
999 req->aiocb = dma_blk_read(blk, &req->qsg, data_offset,
1000 BDRV_SECTOR_SIZE, nvme_rw_cb, req);
1001 }
1002 } else {
1003 if (acct == BLOCK_ACCT_WRITE) {
1004 req->aiocb = blk_aio_pwritev(blk, data_offset, &req->iov, 0,
1005 nvme_rw_cb, req);
1006 } else {
1007 req->aiocb = blk_aio_preadv(blk, data_offset, &req->iov, 0,
1008 nvme_rw_cb, req);
1009 }
1010 }
1011 return NVME_NO_COMPLETE;
1012
1013 invalid:
1014 block_acct_invalid(blk_get_stats(ns->blkconf.blk), acct);
1015 return status;
1016 }
1017
1018 static uint16_t nvme_io_cmd(NvmeCtrl *n, NvmeRequest *req)
1019 {
1020 uint32_t nsid = le32_to_cpu(req->cmd.nsid);
1021
1022 trace_pci_nvme_io_cmd(nvme_cid(req), nsid, nvme_sqid(req),
1023 req->cmd.opcode, nvme_io_opc_str(req->cmd.opcode));
1024
1025 if (NVME_CC_CSS(n->bar.cc) == NVME_CC_CSS_ADMIN_ONLY) {
1026 return NVME_INVALID_OPCODE | NVME_DNR;
1027 }
1028
1029 if (!nvme_nsid_valid(n, nsid)) {
1030 return NVME_INVALID_NSID | NVME_DNR;
1031 }
1032
1033 req->ns = nvme_ns(n, nsid);
1034 if (unlikely(!req->ns)) {
1035 return NVME_INVALID_FIELD | NVME_DNR;
1036 }
1037
1038 switch (req->cmd.opcode) {
1039 case NVME_CMD_FLUSH:
1040 return nvme_flush(n, req);
1041 case NVME_CMD_WRITE_ZEROES:
1042 return nvme_write_zeroes(n, req);
1043 case NVME_CMD_WRITE:
1044 case NVME_CMD_READ:
1045 return nvme_rw(n, req);
1046 default:
1047 trace_pci_nvme_err_invalid_opc(req->cmd.opcode);
1048 return NVME_INVALID_OPCODE | NVME_DNR;
1049 }
1050 }
1051
1052 static void nvme_free_sq(NvmeSQueue *sq, NvmeCtrl *n)
1053 {
1054 n->sq[sq->sqid] = NULL;
1055 timer_del(sq->timer);
1056 timer_free(sq->timer);
1057 g_free(sq->io_req);
1058 if (sq->sqid) {
1059 g_free(sq);
1060 }
1061 }
1062
1063 static uint16_t nvme_del_sq(NvmeCtrl *n, NvmeRequest *req)
1064 {
1065 NvmeDeleteQ *c = (NvmeDeleteQ *)&req->cmd;
1066 NvmeRequest *r, *next;
1067 NvmeSQueue *sq;
1068 NvmeCQueue *cq;
1069 uint16_t qid = le16_to_cpu(c->qid);
1070
1071 if (unlikely(!qid || nvme_check_sqid(n, qid))) {
1072 trace_pci_nvme_err_invalid_del_sq(qid);
1073 return NVME_INVALID_QID | NVME_DNR;
1074 }
1075
1076 trace_pci_nvme_del_sq(qid);
1077
1078 sq = n->sq[qid];
1079 while (!QTAILQ_EMPTY(&sq->out_req_list)) {
1080 r = QTAILQ_FIRST(&sq->out_req_list);
1081 assert(r->aiocb);
1082 blk_aio_cancel(r->aiocb);
1083 }
1084 if (!nvme_check_cqid(n, sq->cqid)) {
1085 cq = n->cq[sq->cqid];
1086 QTAILQ_REMOVE(&cq->sq_list, sq, entry);
1087
1088 nvme_post_cqes(cq);
1089 QTAILQ_FOREACH_SAFE(r, &cq->req_list, entry, next) {
1090 if (r->sq == sq) {
1091 QTAILQ_REMOVE(&cq->req_list, r, entry);
1092 QTAILQ_INSERT_TAIL(&sq->req_list, r, entry);
1093 }
1094 }
1095 }
1096
1097 nvme_free_sq(sq, n);
1098 return NVME_SUCCESS;
1099 }
1100
1101 static void nvme_init_sq(NvmeSQueue *sq, NvmeCtrl *n, uint64_t dma_addr,
1102 uint16_t sqid, uint16_t cqid, uint16_t size)
1103 {
1104 int i;
1105 NvmeCQueue *cq;
1106
1107 sq->ctrl = n;
1108 sq->dma_addr = dma_addr;
1109 sq->sqid = sqid;
1110 sq->size = size;
1111 sq->cqid = cqid;
1112 sq->head = sq->tail = 0;
1113 sq->io_req = g_new0(NvmeRequest, sq->size);
1114
1115 QTAILQ_INIT(&sq->req_list);
1116 QTAILQ_INIT(&sq->out_req_list);
1117 for (i = 0; i < sq->size; i++) {
1118 sq->io_req[i].sq = sq;
1119 QTAILQ_INSERT_TAIL(&(sq->req_list), &sq->io_req[i], entry);
1120 }
1121 sq->timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, nvme_process_sq, sq);
1122
1123 assert(n->cq[cqid]);
1124 cq = n->cq[cqid];
1125 QTAILQ_INSERT_TAIL(&(cq->sq_list), sq, entry);
1126 n->sq[sqid] = sq;
1127 }
1128
1129 static uint16_t nvme_create_sq(NvmeCtrl *n, NvmeRequest *req)
1130 {
1131 NvmeSQueue *sq;
1132 NvmeCreateSq *c = (NvmeCreateSq *)&req->cmd;
1133
1134 uint16_t cqid = le16_to_cpu(c->cqid);
1135 uint16_t sqid = le16_to_cpu(c->sqid);
1136 uint16_t qsize = le16_to_cpu(c->qsize);
1137 uint16_t qflags = le16_to_cpu(c->sq_flags);
1138 uint64_t prp1 = le64_to_cpu(c->prp1);
1139
1140 trace_pci_nvme_create_sq(prp1, sqid, cqid, qsize, qflags);
1141
1142 if (unlikely(!cqid || nvme_check_cqid(n, cqid))) {
1143 trace_pci_nvme_err_invalid_create_sq_cqid(cqid);
1144 return NVME_INVALID_CQID | NVME_DNR;
1145 }
1146 if (unlikely(!sqid || sqid > n->params.max_ioqpairs ||
1147 n->sq[sqid] != NULL)) {
1148 trace_pci_nvme_err_invalid_create_sq_sqid(sqid);
1149 return NVME_INVALID_QID | NVME_DNR;
1150 }
1151 if (unlikely(!qsize || qsize > NVME_CAP_MQES(n->bar.cap))) {
1152 trace_pci_nvme_err_invalid_create_sq_size(qsize);
1153 return NVME_MAX_QSIZE_EXCEEDED | NVME_DNR;
1154 }
1155 if (unlikely(prp1 & (n->page_size - 1))) {
1156 trace_pci_nvme_err_invalid_create_sq_addr(prp1);
1157 return NVME_INVALID_PRP_OFFSET | NVME_DNR;
1158 }
1159 if (unlikely(!(NVME_SQ_FLAGS_PC(qflags)))) {
1160 trace_pci_nvme_err_invalid_create_sq_qflags(NVME_SQ_FLAGS_PC(qflags));
1161 return NVME_INVALID_FIELD | NVME_DNR;
1162 }
1163 sq = g_malloc0(sizeof(*sq));
1164 nvme_init_sq(sq, n, prp1, sqid, cqid, qsize + 1);
1165 return NVME_SUCCESS;
1166 }
1167
1168 struct nvme_stats {
1169 uint64_t units_read;
1170 uint64_t units_written;
1171 uint64_t read_commands;
1172 uint64_t write_commands;
1173 };
1174
1175 static void nvme_set_blk_stats(NvmeNamespace *ns, struct nvme_stats *stats)
1176 {
1177 BlockAcctStats *s = blk_get_stats(ns->blkconf.blk);
1178
1179 stats->units_read += s->nr_bytes[BLOCK_ACCT_READ] >> BDRV_SECTOR_BITS;
1180 stats->units_written += s->nr_bytes[BLOCK_ACCT_WRITE] >> BDRV_SECTOR_BITS;
1181 stats->read_commands += s->nr_ops[BLOCK_ACCT_READ];
1182 stats->write_commands += s->nr_ops[BLOCK_ACCT_WRITE];
1183 }
1184
1185 static uint16_t nvme_smart_info(NvmeCtrl *n, uint8_t rae, uint32_t buf_len,
1186 uint64_t off, NvmeRequest *req)
1187 {
1188 uint32_t nsid = le32_to_cpu(req->cmd.nsid);
1189 struct nvme_stats stats = { 0 };
1190 NvmeSmartLog smart = { 0 };
1191 uint32_t trans_len;
1192 NvmeNamespace *ns;
1193 time_t current_ms;
1194
1195 if (off >= sizeof(smart)) {
1196 return NVME_INVALID_FIELD | NVME_DNR;
1197 }
1198
1199 if (nsid != 0xffffffff) {
1200 ns = nvme_ns(n, nsid);
1201 if (!ns) {
1202 return NVME_INVALID_NSID | NVME_DNR;
1203 }
1204 nvme_set_blk_stats(ns, &stats);
1205 } else {
1206 int i;
1207
1208 for (i = 1; i <= n->num_namespaces; i++) {
1209 ns = nvme_ns(n, i);
1210 if (!ns) {
1211 continue;
1212 }
1213 nvme_set_blk_stats(ns, &stats);
1214 }
1215 }
1216
1217 trans_len = MIN(sizeof(smart) - off, buf_len);
1218
1219 smart.data_units_read[0] = cpu_to_le64(DIV_ROUND_UP(stats.units_read,
1220 1000));
1221 smart.data_units_written[0] = cpu_to_le64(DIV_ROUND_UP(stats.units_written,
1222 1000));
1223 smart.host_read_commands[0] = cpu_to_le64(stats.read_commands);
1224 smart.host_write_commands[0] = cpu_to_le64(stats.write_commands);
1225
1226 smart.temperature = cpu_to_le16(n->temperature);
1227
1228 if ((n->temperature >= n->features.temp_thresh_hi) ||
1229 (n->temperature <= n->features.temp_thresh_low)) {
1230 smart.critical_warning |= NVME_SMART_TEMPERATURE;
1231 }
1232
1233 current_ms = qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL);
1234 smart.power_on_hours[0] =
1235 cpu_to_le64((((current_ms - n->starttime_ms) / 1000) / 60) / 60);
1236
1237 if (!rae) {
1238 nvme_clear_events(n, NVME_AER_TYPE_SMART);
1239 }
1240
1241 return nvme_dma(n, (uint8_t *) &smart + off, trans_len,
1242 DMA_DIRECTION_FROM_DEVICE, req);
1243 }
1244
1245 static uint16_t nvme_fw_log_info(NvmeCtrl *n, uint32_t buf_len, uint64_t off,
1246 NvmeRequest *req)
1247 {
1248 uint32_t trans_len;
1249 NvmeFwSlotInfoLog fw_log = {
1250 .afi = 0x1,
1251 };
1252
1253 if (off >= sizeof(fw_log)) {
1254 return NVME_INVALID_FIELD | NVME_DNR;
1255 }
1256
1257 strpadcpy((char *)&fw_log.frs1, sizeof(fw_log.frs1), "1.0", ' ');
1258 trans_len = MIN(sizeof(fw_log) - off, buf_len);
1259
1260 return nvme_dma(n, (uint8_t *) &fw_log + off, trans_len,
1261 DMA_DIRECTION_FROM_DEVICE, req);
1262 }
1263
1264 static uint16_t nvme_error_info(NvmeCtrl *n, uint8_t rae, uint32_t buf_len,
1265 uint64_t off, NvmeRequest *req)
1266 {
1267 uint32_t trans_len;
1268 NvmeErrorLog errlog;
1269
1270 if (off >= sizeof(errlog)) {
1271 return NVME_INVALID_FIELD | NVME_DNR;
1272 }
1273
1274 if (!rae) {
1275 nvme_clear_events(n, NVME_AER_TYPE_ERROR);
1276 }
1277
1278 memset(&errlog, 0x0, sizeof(errlog));
1279 trans_len = MIN(sizeof(errlog) - off, buf_len);
1280
1281 return nvme_dma(n, (uint8_t *)&errlog, trans_len,
1282 DMA_DIRECTION_FROM_DEVICE, req);
1283 }
1284
1285 static uint16_t nvme_get_log(NvmeCtrl *n, NvmeRequest *req)
1286 {
1287 NvmeCmd *cmd = &req->cmd;
1288
1289 uint32_t dw10 = le32_to_cpu(cmd->cdw10);
1290 uint32_t dw11 = le32_to_cpu(cmd->cdw11);
1291 uint32_t dw12 = le32_to_cpu(cmd->cdw12);
1292 uint32_t dw13 = le32_to_cpu(cmd->cdw13);
1293 uint8_t lid = dw10 & 0xff;
1294 uint8_t lsp = (dw10 >> 8) & 0xf;
1295 uint8_t rae = (dw10 >> 15) & 0x1;
1296 uint32_t numdl, numdu;
1297 uint64_t off, lpol, lpou;
1298 size_t len;
1299 uint16_t status;
1300
1301 numdl = (dw10 >> 16);
1302 numdu = (dw11 & 0xffff);
1303 lpol = dw12;
1304 lpou = dw13;
1305
1306 len = (((numdu << 16) | numdl) + 1) << 2;
1307 off = (lpou << 32ULL) | lpol;
1308
1309 if (off & 0x3) {
1310 return NVME_INVALID_FIELD | NVME_DNR;
1311 }
1312
1313 trace_pci_nvme_get_log(nvme_cid(req), lid, lsp, rae, len, off);
1314
1315 status = nvme_check_mdts(n, len);
1316 if (status) {
1317 trace_pci_nvme_err_mdts(nvme_cid(req), len);
1318 return status;
1319 }
1320
1321 switch (lid) {
1322 case NVME_LOG_ERROR_INFO:
1323 return nvme_error_info(n, rae, len, off, req);
1324 case NVME_LOG_SMART_INFO:
1325 return nvme_smart_info(n, rae, len, off, req);
1326 case NVME_LOG_FW_SLOT_INFO:
1327 return nvme_fw_log_info(n, len, off, req);
1328 default:
1329 trace_pci_nvme_err_invalid_log_page(nvme_cid(req), lid);
1330 return NVME_INVALID_FIELD | NVME_DNR;
1331 }
1332 }
1333
1334 static void nvme_free_cq(NvmeCQueue *cq, NvmeCtrl *n)
1335 {
1336 n->cq[cq->cqid] = NULL;
1337 timer_del(cq->timer);
1338 timer_free(cq->timer);
1339 msix_vector_unuse(&n->parent_obj, cq->vector);
1340 if (cq->cqid) {
1341 g_free(cq);
1342 }
1343 }
1344
1345 static uint16_t nvme_del_cq(NvmeCtrl *n, NvmeRequest *req)
1346 {
1347 NvmeDeleteQ *c = (NvmeDeleteQ *)&req->cmd;
1348 NvmeCQueue *cq;
1349 uint16_t qid = le16_to_cpu(c->qid);
1350
1351 if (unlikely(!qid || nvme_check_cqid(n, qid))) {
1352 trace_pci_nvme_err_invalid_del_cq_cqid(qid);
1353 return NVME_INVALID_CQID | NVME_DNR;
1354 }
1355
1356 cq = n->cq[qid];
1357 if (unlikely(!QTAILQ_EMPTY(&cq->sq_list))) {
1358 trace_pci_nvme_err_invalid_del_cq_notempty(qid);
1359 return NVME_INVALID_QUEUE_DEL;
1360 }
1361 nvme_irq_deassert(n, cq);
1362 trace_pci_nvme_del_cq(qid);
1363 nvme_free_cq(cq, n);
1364 return NVME_SUCCESS;
1365 }
1366
1367 static void nvme_init_cq(NvmeCQueue *cq, NvmeCtrl *n, uint64_t dma_addr,
1368 uint16_t cqid, uint16_t vector, uint16_t size,
1369 uint16_t irq_enabled)
1370 {
1371 int ret;
1372
1373 ret = msix_vector_use(&n->parent_obj, vector);
1374 assert(ret == 0);
1375 cq->ctrl = n;
1376 cq->cqid = cqid;
1377 cq->size = size;
1378 cq->dma_addr = dma_addr;
1379 cq->phase = 1;
1380 cq->irq_enabled = irq_enabled;
1381 cq->vector = vector;
1382 cq->head = cq->tail = 0;
1383 QTAILQ_INIT(&cq->req_list);
1384 QTAILQ_INIT(&cq->sq_list);
1385 n->cq[cqid] = cq;
1386 cq->timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, nvme_post_cqes, cq);
1387 }
1388
1389 static uint16_t nvme_create_cq(NvmeCtrl *n, NvmeRequest *req)
1390 {
1391 NvmeCQueue *cq;
1392 NvmeCreateCq *c = (NvmeCreateCq *)&req->cmd;
1393 uint16_t cqid = le16_to_cpu(c->cqid);
1394 uint16_t vector = le16_to_cpu(c->irq_vector);
1395 uint16_t qsize = le16_to_cpu(c->qsize);
1396 uint16_t qflags = le16_to_cpu(c->cq_flags);
1397 uint64_t prp1 = le64_to_cpu(c->prp1);
1398
1399 trace_pci_nvme_create_cq(prp1, cqid, vector, qsize, qflags,
1400 NVME_CQ_FLAGS_IEN(qflags) != 0);
1401
1402 if (unlikely(!cqid || cqid > n->params.max_ioqpairs ||
1403 n->cq[cqid] != NULL)) {
1404 trace_pci_nvme_err_invalid_create_cq_cqid(cqid);
1405 return NVME_INVALID_QID | NVME_DNR;
1406 }
1407 if (unlikely(!qsize || qsize > NVME_CAP_MQES(n->bar.cap))) {
1408 trace_pci_nvme_err_invalid_create_cq_size(qsize);
1409 return NVME_MAX_QSIZE_EXCEEDED | NVME_DNR;
1410 }
1411 if (unlikely(prp1 & (n->page_size - 1))) {
1412 trace_pci_nvme_err_invalid_create_cq_addr(prp1);
1413 return NVME_INVALID_PRP_OFFSET | NVME_DNR;
1414 }
1415 if (unlikely(!msix_enabled(&n->parent_obj) && vector)) {
1416 trace_pci_nvme_err_invalid_create_cq_vector(vector);
1417 return NVME_INVALID_IRQ_VECTOR | NVME_DNR;
1418 }
1419 if (unlikely(vector >= n->params.msix_qsize)) {
1420 trace_pci_nvme_err_invalid_create_cq_vector(vector);
1421 return NVME_INVALID_IRQ_VECTOR | NVME_DNR;
1422 }
1423 if (unlikely(!(NVME_CQ_FLAGS_PC(qflags)))) {
1424 trace_pci_nvme_err_invalid_create_cq_qflags(NVME_CQ_FLAGS_PC(qflags));
1425 return NVME_INVALID_FIELD | NVME_DNR;
1426 }
1427
1428 cq = g_malloc0(sizeof(*cq));
1429 nvme_init_cq(cq, n, prp1, cqid, vector, qsize + 1,
1430 NVME_CQ_FLAGS_IEN(qflags));
1431
1432 /*
1433 * It is only required to set qs_created when creating a completion queue;
1434 * creating a submission queue without a matching completion queue will
1435 * fail.
1436 */
1437 n->qs_created = true;
1438 return NVME_SUCCESS;
1439 }
1440
1441 static uint16_t nvme_identify_ctrl(NvmeCtrl *n, NvmeRequest *req)
1442 {
1443 trace_pci_nvme_identify_ctrl();
1444
1445 return nvme_dma(n, (uint8_t *)&n->id_ctrl, sizeof(n->id_ctrl),
1446 DMA_DIRECTION_FROM_DEVICE, req);
1447 }
1448
1449 static uint16_t nvme_identify_ns(NvmeCtrl *n, NvmeRequest *req)
1450 {
1451 NvmeNamespace *ns;
1452 NvmeIdentify *c = (NvmeIdentify *)&req->cmd;
1453 NvmeIdNs *id_ns, inactive = { 0 };
1454 uint32_t nsid = le32_to_cpu(c->nsid);
1455
1456 trace_pci_nvme_identify_ns(nsid);
1457
1458 if (!nvme_nsid_valid(n, nsid) || nsid == NVME_NSID_BROADCAST) {
1459 return NVME_INVALID_NSID | NVME_DNR;
1460 }
1461
1462 ns = nvme_ns(n, nsid);
1463 if (unlikely(!ns)) {
1464 id_ns = &inactive;
1465 } else {
1466 id_ns = &ns->id_ns;
1467 }
1468
1469 return nvme_dma(n, (uint8_t *)id_ns, sizeof(NvmeIdNs),
1470 DMA_DIRECTION_FROM_DEVICE, req);
1471 }
1472
1473 static uint16_t nvme_identify_nslist(NvmeCtrl *n, NvmeRequest *req)
1474 {
1475 NvmeIdentify *c = (NvmeIdentify *)&req->cmd;
1476 static const int data_len = NVME_IDENTIFY_DATA_SIZE;
1477 uint32_t min_nsid = le32_to_cpu(c->nsid);
1478 uint32_t *list;
1479 uint16_t ret;
1480 int j = 0;
1481
1482 trace_pci_nvme_identify_nslist(min_nsid);
1483
1484 /*
1485 * Both 0xffffffff (NVME_NSID_BROADCAST) and 0xfffffffe are invalid values
1486 * since the Active Namespace ID List should return namespaces with ids
1487 * *higher* than the NSID specified in the command. This is also specified
1488 * in the spec (NVM Express v1.3d, Section 5.15.4).
1489 */
1490 if (min_nsid >= NVME_NSID_BROADCAST - 1) {
1491 return NVME_INVALID_NSID | NVME_DNR;
1492 }
1493
1494 list = g_malloc0(data_len);
1495 for (int i = 1; i <= n->num_namespaces; i++) {
1496 if (i <= min_nsid || !nvme_ns(n, i)) {
1497 continue;
1498 }
1499 list[j++] = cpu_to_le32(i);
1500 if (j == data_len / sizeof(uint32_t)) {
1501 break;
1502 }
1503 }
1504 ret = nvme_dma(n, (uint8_t *)list, data_len, DMA_DIRECTION_FROM_DEVICE,
1505 req);
1506 g_free(list);
1507 return ret;
1508 }
1509
1510 static uint16_t nvme_identify_ns_descr_list(NvmeCtrl *n, NvmeRequest *req)
1511 {
1512 NvmeIdentify *c = (NvmeIdentify *)&req->cmd;
1513 uint32_t nsid = le32_to_cpu(c->nsid);
1514 uint8_t list[NVME_IDENTIFY_DATA_SIZE];
1515
1516 struct data {
1517 struct {
1518 NvmeIdNsDescr hdr;
1519 uint8_t v[16];
1520 } uuid;
1521 };
1522
1523 struct data *ns_descrs = (struct data *)list;
1524
1525 trace_pci_nvme_identify_ns_descr_list(nsid);
1526
1527 if (!nvme_nsid_valid(n, nsid) || nsid == NVME_NSID_BROADCAST) {
1528 return NVME_INVALID_NSID | NVME_DNR;
1529 }
1530
1531 if (unlikely(!nvme_ns(n, nsid))) {
1532 return NVME_INVALID_FIELD | NVME_DNR;
1533 }
1534
1535 memset(list, 0x0, sizeof(list));
1536
1537 /*
1538 * Because the NGUID and EUI64 fields are 0 in the Identify Namespace data
1539 * structure, a Namespace UUID (nidt = 0x3) must be reported in the
1540 * Namespace Identification Descriptor. Add a very basic Namespace UUID
1541 * here.
1542 */
1543 ns_descrs->uuid.hdr.nidt = NVME_NIDT_UUID;
1544 ns_descrs->uuid.hdr.nidl = NVME_NIDT_UUID_LEN;
1545 stl_be_p(&ns_descrs->uuid.v, nsid);
1546
1547 return nvme_dma(n, list, NVME_IDENTIFY_DATA_SIZE,
1548 DMA_DIRECTION_FROM_DEVICE, req);
1549 }
1550
1551 static uint16_t nvme_identify(NvmeCtrl *n, NvmeRequest *req)
1552 {
1553 NvmeIdentify *c = (NvmeIdentify *)&req->cmd;
1554
1555 switch (le32_to_cpu(c->cns)) {
1556 case NVME_ID_CNS_NS:
1557 return nvme_identify_ns(n, req);
1558 case NVME_ID_CNS_CTRL:
1559 return nvme_identify_ctrl(n, req);
1560 case NVME_ID_CNS_NS_ACTIVE_LIST:
1561 return nvme_identify_nslist(n, req);
1562 case NVME_ID_CNS_NS_DESCR_LIST:
1563 return nvme_identify_ns_descr_list(n, req);
1564 default:
1565 trace_pci_nvme_err_invalid_identify_cns(le32_to_cpu(c->cns));
1566 return NVME_INVALID_FIELD | NVME_DNR;
1567 }
1568 }
1569
1570 static uint16_t nvme_abort(NvmeCtrl *n, NvmeRequest *req)
1571 {
1572 uint16_t sqid = le32_to_cpu(req->cmd.cdw10) & 0xffff;
1573
1574 req->cqe.result = 1;
1575 if (nvme_check_sqid(n, sqid)) {
1576 return NVME_INVALID_FIELD | NVME_DNR;
1577 }
1578
1579 return NVME_SUCCESS;
1580 }
1581
1582 static inline void nvme_set_timestamp(NvmeCtrl *n, uint64_t ts)
1583 {
1584 trace_pci_nvme_setfeat_timestamp(ts);
1585
1586 n->host_timestamp = le64_to_cpu(ts);
1587 n->timestamp_set_qemu_clock_ms = qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL);
1588 }
1589
1590 static inline uint64_t nvme_get_timestamp(const NvmeCtrl *n)
1591 {
1592 uint64_t current_time = qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL);
1593 uint64_t elapsed_time = current_time - n->timestamp_set_qemu_clock_ms;
1594
1595 union nvme_timestamp {
1596 struct {
1597 uint64_t timestamp:48;
1598 uint64_t sync:1;
1599 uint64_t origin:3;
1600 uint64_t rsvd1:12;
1601 };
1602 uint64_t all;
1603 };
1604
1605 union nvme_timestamp ts;
1606 ts.all = 0;
1607 ts.timestamp = n->host_timestamp + elapsed_time;
1608
1609 /* If the host timestamp is non-zero, set the timestamp origin */
1610 ts.origin = n->host_timestamp ? 0x01 : 0x00;
1611
1612 trace_pci_nvme_getfeat_timestamp(ts.all);
1613
1614 return cpu_to_le64(ts.all);
1615 }
1616
1617 static uint16_t nvme_get_feature_timestamp(NvmeCtrl *n, NvmeRequest *req)
1618 {
1619 uint64_t timestamp = nvme_get_timestamp(n);
1620
1621 return nvme_dma(n, (uint8_t *)&timestamp, sizeof(timestamp),
1622 DMA_DIRECTION_FROM_DEVICE, req);
1623 }
1624
1625 static uint16_t nvme_get_feature(NvmeCtrl *n, NvmeRequest *req)
1626 {
1627 NvmeCmd *cmd = &req->cmd;
1628 uint32_t dw10 = le32_to_cpu(cmd->cdw10);
1629 uint32_t dw11 = le32_to_cpu(cmd->cdw11);
1630 uint32_t nsid = le32_to_cpu(cmd->nsid);
1631 uint32_t result;
1632 uint8_t fid = NVME_GETSETFEAT_FID(dw10);
1633 NvmeGetFeatureSelect sel = NVME_GETFEAT_SELECT(dw10);
1634 uint16_t iv;
1635
1636 static const uint32_t nvme_feature_default[NVME_FID_MAX] = {
1637 [NVME_ARBITRATION] = NVME_ARB_AB_NOLIMIT,
1638 };
1639
1640 trace_pci_nvme_getfeat(nvme_cid(req), nsid, fid, sel, dw11);
1641
1642 if (!nvme_feature_support[fid]) {
1643 return NVME_INVALID_FIELD | NVME_DNR;
1644 }
1645
1646 if (nvme_feature_cap[fid] & NVME_FEAT_CAP_NS) {
1647 if (!nvme_nsid_valid(n, nsid) || nsid == NVME_NSID_BROADCAST) {
1648 /*
1649 * The Reservation Notification Mask and Reservation Persistence
1650 * features require a status code of Invalid Field in Command when
1651 * NSID is 0xFFFFFFFF. Since the device does not support those
1652 * features we can always return Invalid Namespace or Format as we
1653 * should do for all other features.
1654 */
1655 return NVME_INVALID_NSID | NVME_DNR;
1656 }
1657
1658 if (!nvme_ns(n, nsid)) {
1659 return NVME_INVALID_FIELD | NVME_DNR;
1660 }
1661 }
1662
1663 switch (sel) {
1664 case NVME_GETFEAT_SELECT_CURRENT:
1665 break;
1666 case NVME_GETFEAT_SELECT_SAVED:
1667 /* no features are saveable by the controller; fallthrough */
1668 case NVME_GETFEAT_SELECT_DEFAULT:
1669 goto defaults;
1670 case NVME_GETFEAT_SELECT_CAP:
1671 result = nvme_feature_cap[fid];
1672 goto out;
1673 }
1674
1675 switch (fid) {
1676 case NVME_TEMPERATURE_THRESHOLD:
1677 result = 0;
1678
1679 /*
1680 * The controller only implements the Composite Temperature sensor, so
1681 * return 0 for all other sensors.
1682 */
1683 if (NVME_TEMP_TMPSEL(dw11) != NVME_TEMP_TMPSEL_COMPOSITE) {
1684 goto out;
1685 }
1686
1687 switch (NVME_TEMP_THSEL(dw11)) {
1688 case NVME_TEMP_THSEL_OVER:
1689 result = n->features.temp_thresh_hi;
1690 goto out;
1691 case NVME_TEMP_THSEL_UNDER:
1692 result = n->features.temp_thresh_low;
1693 goto out;
1694 }
1695
1696 return NVME_INVALID_FIELD | NVME_DNR;
1697 case NVME_VOLATILE_WRITE_CACHE:
1698 result = n->features.vwc;
1699 trace_pci_nvme_getfeat_vwcache(result ? "enabled" : "disabled");
1700 goto out;
1701 case NVME_ASYNCHRONOUS_EVENT_CONF:
1702 result = n->features.async_config;
1703 goto out;
1704 case NVME_TIMESTAMP:
1705 return nvme_get_feature_timestamp(n, req);
1706 default:
1707 break;
1708 }
1709
1710 defaults:
1711 switch (fid) {
1712 case NVME_TEMPERATURE_THRESHOLD:
1713 result = 0;
1714
1715 if (NVME_TEMP_TMPSEL(dw11) != NVME_TEMP_TMPSEL_COMPOSITE) {
1716 break;
1717 }
1718
1719 if (NVME_TEMP_THSEL(dw11) == NVME_TEMP_THSEL_OVER) {
1720 result = NVME_TEMPERATURE_WARNING;
1721 }
1722
1723 break;
1724 case NVME_NUMBER_OF_QUEUES:
1725 result = (n->params.max_ioqpairs - 1) |
1726 ((n->params.max_ioqpairs - 1) << 16);
1727 trace_pci_nvme_getfeat_numq(result);
1728 break;
1729 case NVME_INTERRUPT_VECTOR_CONF:
1730 iv = dw11 & 0xffff;
1731 if (iv >= n->params.max_ioqpairs + 1) {
1732 return NVME_INVALID_FIELD | NVME_DNR;
1733 }
1734
1735 result = iv;
1736 if (iv == n->admin_cq.vector) {
1737 result |= NVME_INTVC_NOCOALESCING;
1738 }
1739
1740 break;
1741 default:
1742 result = nvme_feature_default[fid];
1743 break;
1744 }
1745
1746 out:
1747 req->cqe.result = cpu_to_le32(result);
1748 return NVME_SUCCESS;
1749 }
1750
1751 static uint16_t nvme_set_feature_timestamp(NvmeCtrl *n, NvmeRequest *req)
1752 {
1753 uint16_t ret;
1754 uint64_t timestamp;
1755
1756 ret = nvme_dma(n, (uint8_t *)&timestamp, sizeof(timestamp),
1757 DMA_DIRECTION_TO_DEVICE, req);
1758 if (ret != NVME_SUCCESS) {
1759 return ret;
1760 }
1761
1762 nvme_set_timestamp(n, timestamp);
1763
1764 return NVME_SUCCESS;
1765 }
1766
1767 static uint16_t nvme_set_feature(NvmeCtrl *n, NvmeRequest *req)
1768 {
1769 NvmeNamespace *ns;
1770
1771 NvmeCmd *cmd = &req->cmd;
1772 uint32_t dw10 = le32_to_cpu(cmd->cdw10);
1773 uint32_t dw11 = le32_to_cpu(cmd->cdw11);
1774 uint32_t nsid = le32_to_cpu(cmd->nsid);
1775 uint8_t fid = NVME_GETSETFEAT_FID(dw10);
1776 uint8_t save = NVME_SETFEAT_SAVE(dw10);
1777
1778 trace_pci_nvme_setfeat(nvme_cid(req), nsid, fid, save, dw11);
1779
1780 if (save) {
1781 return NVME_FID_NOT_SAVEABLE | NVME_DNR;
1782 }
1783
1784 if (!nvme_feature_support[fid]) {
1785 return NVME_INVALID_FIELD | NVME_DNR;
1786 }
1787
1788 if (nvme_feature_cap[fid] & NVME_FEAT_CAP_NS) {
1789 if (nsid != NVME_NSID_BROADCAST) {
1790 if (!nvme_nsid_valid(n, nsid)) {
1791 return NVME_INVALID_NSID | NVME_DNR;
1792 }
1793
1794 ns = nvme_ns(n, nsid);
1795 if (unlikely(!ns)) {
1796 return NVME_INVALID_FIELD | NVME_DNR;
1797 }
1798 }
1799 } else if (nsid && nsid != NVME_NSID_BROADCAST) {
1800 if (!nvme_nsid_valid(n, nsid)) {
1801 return NVME_INVALID_NSID | NVME_DNR;
1802 }
1803
1804 return NVME_FEAT_NOT_NS_SPEC | NVME_DNR;
1805 }
1806
1807 if (!(nvme_feature_cap[fid] & NVME_FEAT_CAP_CHANGE)) {
1808 return NVME_FEAT_NOT_CHANGEABLE | NVME_DNR;
1809 }
1810
1811 switch (fid) {
1812 case NVME_TEMPERATURE_THRESHOLD:
1813 if (NVME_TEMP_TMPSEL(dw11) != NVME_TEMP_TMPSEL_COMPOSITE) {
1814 break;
1815 }
1816
1817 switch (NVME_TEMP_THSEL(dw11)) {
1818 case NVME_TEMP_THSEL_OVER:
1819 n->features.temp_thresh_hi = NVME_TEMP_TMPTH(dw11);
1820 break;
1821 case NVME_TEMP_THSEL_UNDER:
1822 n->features.temp_thresh_low = NVME_TEMP_TMPTH(dw11);
1823 break;
1824 default:
1825 return NVME_INVALID_FIELD | NVME_DNR;
1826 }
1827
1828 if (((n->temperature >= n->features.temp_thresh_hi) ||
1829 (n->temperature <= n->features.temp_thresh_low)) &&
1830 NVME_AEC_SMART(n->features.async_config) & NVME_SMART_TEMPERATURE) {
1831 nvme_enqueue_event(n, NVME_AER_TYPE_SMART,
1832 NVME_AER_INFO_SMART_TEMP_THRESH,
1833 NVME_LOG_SMART_INFO);
1834 }
1835
1836 break;
1837 case NVME_VOLATILE_WRITE_CACHE:
1838 n->features.vwc = dw11 & 0x1;
1839
1840 for (int i = 1; i <= n->num_namespaces; i++) {
1841 ns = nvme_ns(n, i);
1842 if (!ns) {
1843 continue;
1844 }
1845
1846 if (!(dw11 & 0x1) && blk_enable_write_cache(ns->blkconf.blk)) {
1847 blk_flush(ns->blkconf.blk);
1848 }
1849
1850 blk_set_enable_write_cache(ns->blkconf.blk, dw11 & 1);
1851 }
1852
1853 break;
1854
1855 case NVME_NUMBER_OF_QUEUES:
1856 if (n->qs_created) {
1857 return NVME_CMD_SEQ_ERROR | NVME_DNR;
1858 }
1859
1860 /*
1861 * NVMe v1.3, Section 5.21.1.7: 0xffff is not an allowed value for NCQR
1862 * and NSQR.
1863 */
1864 if ((dw11 & 0xffff) == 0xffff || ((dw11 >> 16) & 0xffff) == 0xffff) {
1865 return NVME_INVALID_FIELD | NVME_DNR;
1866 }
1867
1868 trace_pci_nvme_setfeat_numq((dw11 & 0xFFFF) + 1,
1869 ((dw11 >> 16) & 0xFFFF) + 1,
1870 n->params.max_ioqpairs,
1871 n->params.max_ioqpairs);
1872 req->cqe.result = cpu_to_le32((n->params.max_ioqpairs - 1) |
1873 ((n->params.max_ioqpairs - 1) << 16));
1874 break;
1875 case NVME_ASYNCHRONOUS_EVENT_CONF:
1876 n->features.async_config = dw11;
1877 break;
1878 case NVME_TIMESTAMP:
1879 return nvme_set_feature_timestamp(n, req);
1880 default:
1881 return NVME_FEAT_NOT_CHANGEABLE | NVME_DNR;
1882 }
1883 return NVME_SUCCESS;
1884 }
1885
1886 static uint16_t nvme_aer(NvmeCtrl *n, NvmeRequest *req)
1887 {
1888 trace_pci_nvme_aer(nvme_cid(req));
1889
1890 if (n->outstanding_aers > n->params.aerl) {
1891 trace_pci_nvme_aer_aerl_exceeded();
1892 return NVME_AER_LIMIT_EXCEEDED;
1893 }
1894
1895 n->aer_reqs[n->outstanding_aers] = req;
1896 n->outstanding_aers++;
1897
1898 if (!QTAILQ_EMPTY(&n->aer_queue)) {
1899 nvme_process_aers(n);
1900 }
1901
1902 return NVME_NO_COMPLETE;
1903 }
1904
1905 static uint16_t nvme_admin_cmd(NvmeCtrl *n, NvmeRequest *req)
1906 {
1907 trace_pci_nvme_admin_cmd(nvme_cid(req), nvme_sqid(req), req->cmd.opcode,
1908 nvme_adm_opc_str(req->cmd.opcode));
1909
1910 switch (req->cmd.opcode) {
1911 case NVME_ADM_CMD_DELETE_SQ:
1912 return nvme_del_sq(n, req);
1913 case NVME_ADM_CMD_CREATE_SQ:
1914 return nvme_create_sq(n, req);
1915 case NVME_ADM_CMD_GET_LOG_PAGE:
1916 return nvme_get_log(n, req);
1917 case NVME_ADM_CMD_DELETE_CQ:
1918 return nvme_del_cq(n, req);
1919 case NVME_ADM_CMD_CREATE_CQ:
1920 return nvme_create_cq(n, req);
1921 case NVME_ADM_CMD_IDENTIFY:
1922 return nvme_identify(n, req);
1923 case NVME_ADM_CMD_ABORT:
1924 return nvme_abort(n, req);
1925 case NVME_ADM_CMD_SET_FEATURES:
1926 return nvme_set_feature(n, req);
1927 case NVME_ADM_CMD_GET_FEATURES:
1928 return nvme_get_feature(n, req);
1929 case NVME_ADM_CMD_ASYNC_EV_REQ:
1930 return nvme_aer(n, req);
1931 default:
1932 trace_pci_nvme_err_invalid_admin_opc(req->cmd.opcode);
1933 return NVME_INVALID_OPCODE | NVME_DNR;
1934 }
1935 }
1936
1937 static void nvme_process_sq(void *opaque)
1938 {
1939 NvmeSQueue *sq = opaque;
1940 NvmeCtrl *n = sq->ctrl;
1941 NvmeCQueue *cq = n->cq[sq->cqid];
1942
1943 uint16_t status;
1944 hwaddr addr;
1945 NvmeCmd cmd;
1946 NvmeRequest *req;
1947
1948 while (!(nvme_sq_empty(sq) || QTAILQ_EMPTY(&sq->req_list))) {
1949 addr = sq->dma_addr + sq->head * n->sqe_size;
1950 if (nvme_addr_read(n, addr, (void *)&cmd, sizeof(cmd))) {
1951 trace_pci_nvme_err_addr_read(addr);
1952 trace_pci_nvme_err_cfs();
1953 n->bar.csts = NVME_CSTS_FAILED;
1954 break;
1955 }
1956 nvme_inc_sq_head(sq);
1957
1958 req = QTAILQ_FIRST(&sq->req_list);
1959 QTAILQ_REMOVE(&sq->req_list, req, entry);
1960 QTAILQ_INSERT_TAIL(&sq->out_req_list, req, entry);
1961 nvme_req_clear(req);
1962 req->cqe.cid = cmd.cid;
1963 memcpy(&req->cmd, &cmd, sizeof(NvmeCmd));
1964
1965 status = sq->sqid ? nvme_io_cmd(n, req) :
1966 nvme_admin_cmd(n, req);
1967 if (status != NVME_NO_COMPLETE) {
1968 req->status = status;
1969 nvme_enqueue_req_completion(cq, req);
1970 }
1971 }
1972 }
1973
1974 static void nvme_clear_ctrl(NvmeCtrl *n)
1975 {
1976 NvmeNamespace *ns;
1977 int i;
1978
1979 for (i = 1; i <= n->num_namespaces; i++) {
1980 ns = nvme_ns(n, i);
1981 if (!ns) {
1982 continue;
1983 }
1984
1985 nvme_ns_drain(ns);
1986 }
1987
1988 for (i = 0; i < n->params.max_ioqpairs + 1; i++) {
1989 if (n->sq[i] != NULL) {
1990 nvme_free_sq(n->sq[i], n);
1991 }
1992 }
1993 for (i = 0; i < n->params.max_ioqpairs + 1; i++) {
1994 if (n->cq[i] != NULL) {
1995 nvme_free_cq(n->cq[i], n);
1996 }
1997 }
1998
1999 while (!QTAILQ_EMPTY(&n->aer_queue)) {
2000 NvmeAsyncEvent *event = QTAILQ_FIRST(&n->aer_queue);
2001 QTAILQ_REMOVE(&n->aer_queue, event, entry);
2002 g_free(event);
2003 }
2004
2005 n->aer_queued = 0;
2006 n->outstanding_aers = 0;
2007 n->qs_created = false;
2008
2009 for (i = 1; i <= n->num_namespaces; i++) {
2010 ns = nvme_ns(n, i);
2011 if (!ns) {
2012 continue;
2013 }
2014
2015 nvme_ns_flush(ns);
2016 }
2017
2018 n->bar.cc = 0;
2019 }
2020
2021 static int nvme_start_ctrl(NvmeCtrl *n)
2022 {
2023 uint32_t page_bits = NVME_CC_MPS(n->bar.cc) + 12;
2024 uint32_t page_size = 1 << page_bits;
2025
2026 if (unlikely(n->cq[0])) {
2027 trace_pci_nvme_err_startfail_cq();
2028 return -1;
2029 }
2030 if (unlikely(n->sq[0])) {
2031 trace_pci_nvme_err_startfail_sq();
2032 return -1;
2033 }
2034 if (unlikely(!n->bar.asq)) {
2035 trace_pci_nvme_err_startfail_nbarasq();
2036 return -1;
2037 }
2038 if (unlikely(!n->bar.acq)) {
2039 trace_pci_nvme_err_startfail_nbaracq();
2040 return -1;
2041 }
2042 if (unlikely(n->bar.asq & (page_size - 1))) {
2043 trace_pci_nvme_err_startfail_asq_misaligned(n->bar.asq);
2044 return -1;
2045 }
2046 if (unlikely(n->bar.acq & (page_size - 1))) {
2047 trace_pci_nvme_err_startfail_acq_misaligned(n->bar.acq);
2048 return -1;
2049 }
2050 if (unlikely(!(NVME_CAP_CSS(n->bar.cap) & (1 << NVME_CC_CSS(n->bar.cc))))) {
2051 trace_pci_nvme_err_startfail_css(NVME_CC_CSS(n->bar.cc));
2052 return -1;
2053 }
2054 if (unlikely(NVME_CC_MPS(n->bar.cc) <
2055 NVME_CAP_MPSMIN(n->bar.cap))) {
2056 trace_pci_nvme_err_startfail_page_too_small(
2057 NVME_CC_MPS(n->bar.cc),
2058 NVME_CAP_MPSMIN(n->bar.cap));
2059 return -1;
2060 }
2061 if (unlikely(NVME_CC_MPS(n->bar.cc) >
2062 NVME_CAP_MPSMAX(n->bar.cap))) {
2063 trace_pci_nvme_err_startfail_page_too_large(
2064 NVME_CC_MPS(n->bar.cc),
2065 NVME_CAP_MPSMAX(n->bar.cap));
2066 return -1;
2067 }
2068 if (unlikely(NVME_CC_IOCQES(n->bar.cc) <
2069 NVME_CTRL_CQES_MIN(n->id_ctrl.cqes))) {
2070 trace_pci_nvme_err_startfail_cqent_too_small(
2071 NVME_CC_IOCQES(n->bar.cc),
2072 NVME_CTRL_CQES_MIN(n->bar.cap));
2073 return -1;
2074 }
2075 if (unlikely(NVME_CC_IOCQES(n->bar.cc) >
2076 NVME_CTRL_CQES_MAX(n->id_ctrl.cqes))) {
2077 trace_pci_nvme_err_startfail_cqent_too_large(
2078 NVME_CC_IOCQES(n->bar.cc),
2079 NVME_CTRL_CQES_MAX(n->bar.cap));
2080 return -1;
2081 }
2082 if (unlikely(NVME_CC_IOSQES(n->bar.cc) <
2083 NVME_CTRL_SQES_MIN(n->id_ctrl.sqes))) {
2084 trace_pci_nvme_err_startfail_sqent_too_small(
2085 NVME_CC_IOSQES(n->bar.cc),
2086 NVME_CTRL_SQES_MIN(n->bar.cap));
2087 return -1;
2088 }
2089 if (unlikely(NVME_CC_IOSQES(n->bar.cc) >
2090 NVME_CTRL_SQES_MAX(n->id_ctrl.sqes))) {
2091 trace_pci_nvme_err_startfail_sqent_too_large(
2092 NVME_CC_IOSQES(n->bar.cc),
2093 NVME_CTRL_SQES_MAX(n->bar.cap));
2094 return -1;
2095 }
2096 if (unlikely(!NVME_AQA_ASQS(n->bar.aqa))) {
2097 trace_pci_nvme_err_startfail_asqent_sz_zero();
2098 return -1;
2099 }
2100 if (unlikely(!NVME_AQA_ACQS(n->bar.aqa))) {
2101 trace_pci_nvme_err_startfail_acqent_sz_zero();
2102 return -1;
2103 }
2104
2105 n->page_bits = page_bits;
2106 n->page_size = page_size;
2107 n->max_prp_ents = n->page_size / sizeof(uint64_t);
2108 n->cqe_size = 1 << NVME_CC_IOCQES(n->bar.cc);
2109 n->sqe_size = 1 << NVME_CC_IOSQES(n->bar.cc);
2110 nvme_init_cq(&n->admin_cq, n, n->bar.acq, 0, 0,
2111 NVME_AQA_ACQS(n->bar.aqa) + 1, 1);
2112 nvme_init_sq(&n->admin_sq, n, n->bar.asq, 0, 0,
2113 NVME_AQA_ASQS(n->bar.aqa) + 1);
2114
2115 nvme_set_timestamp(n, 0ULL);
2116
2117 QTAILQ_INIT(&n->aer_queue);
2118
2119 return 0;
2120 }
2121
2122 static void nvme_write_bar(NvmeCtrl *n, hwaddr offset, uint64_t data,
2123 unsigned size)
2124 {
2125 if (unlikely(offset & (sizeof(uint32_t) - 1))) {
2126 NVME_GUEST_ERR(pci_nvme_ub_mmiowr_misaligned32,
2127 "MMIO write not 32-bit aligned,"
2128 " offset=0x%"PRIx64"", offset);
2129 /* should be ignored, fall through for now */
2130 }
2131
2132 if (unlikely(size < sizeof(uint32_t))) {
2133 NVME_GUEST_ERR(pci_nvme_ub_mmiowr_toosmall,
2134 "MMIO write smaller than 32-bits,"
2135 " offset=0x%"PRIx64", size=%u",
2136 offset, size);
2137 /* should be ignored, fall through for now */
2138 }
2139
2140 switch (offset) {
2141 case 0xc: /* INTMS */
2142 if (unlikely(msix_enabled(&(n->parent_obj)))) {
2143 NVME_GUEST_ERR(pci_nvme_ub_mmiowr_intmask_with_msix,
2144 "undefined access to interrupt mask set"
2145 " when MSI-X is enabled");
2146 /* should be ignored, fall through for now */
2147 }
2148 n->bar.intms |= data & 0xffffffff;
2149 n->bar.intmc = n->bar.intms;
2150 trace_pci_nvme_mmio_intm_set(data & 0xffffffff, n->bar.intmc);
2151 nvme_irq_check(n);
2152 break;
2153 case 0x10: /* INTMC */
2154 if (unlikely(msix_enabled(&(n->parent_obj)))) {
2155 NVME_GUEST_ERR(pci_nvme_ub_mmiowr_intmask_with_msix,
2156 "undefined access to interrupt mask clr"
2157 " when MSI-X is enabled");
2158 /* should be ignored, fall through for now */
2159 }
2160 n->bar.intms &= ~(data & 0xffffffff);
2161 n->bar.intmc = n->bar.intms;
2162 trace_pci_nvme_mmio_intm_clr(data & 0xffffffff, n->bar.intmc);
2163 nvme_irq_check(n);
2164 break;
2165 case 0x14: /* CC */
2166 trace_pci_nvme_mmio_cfg(data & 0xffffffff);
2167 /* Windows first sends data, then sends enable bit */
2168 if (!NVME_CC_EN(data) && !NVME_CC_EN(n->bar.cc) &&
2169 !NVME_CC_SHN(data) && !NVME_CC_SHN(n->bar.cc))
2170 {
2171 n->bar.cc = data;
2172 }
2173
2174 if (NVME_CC_EN(data) && !NVME_CC_EN(n->bar.cc)) {
2175 n->bar.cc = data;
2176 if (unlikely(nvme_start_ctrl(n))) {
2177 trace_pci_nvme_err_startfail();
2178 n->bar.csts = NVME_CSTS_FAILED;
2179 } else {
2180 trace_pci_nvme_mmio_start_success();
2181 n->bar.csts = NVME_CSTS_READY;
2182 }
2183 } else if (!NVME_CC_EN(data) && NVME_CC_EN(n->bar.cc)) {
2184 trace_pci_nvme_mmio_stopped();
2185 nvme_clear_ctrl(n);
2186 n->bar.csts &= ~NVME_CSTS_READY;
2187 }
2188 if (NVME_CC_SHN(data) && !(NVME_CC_SHN(n->bar.cc))) {
2189 trace_pci_nvme_mmio_shutdown_set();
2190 nvme_clear_ctrl(n);
2191 n->bar.cc = data;
2192 n->bar.csts |= NVME_CSTS_SHST_COMPLETE;
2193 } else if (!NVME_CC_SHN(data) && NVME_CC_SHN(n->bar.cc)) {
2194 trace_pci_nvme_mmio_shutdown_cleared();
2195 n->bar.csts &= ~NVME_CSTS_SHST_COMPLETE;
2196 n->bar.cc = data;
2197 }
2198 break;
2199 case 0x1C: /* CSTS */
2200 if (data & (1 << 4)) {
2201 NVME_GUEST_ERR(pci_nvme_ub_mmiowr_ssreset_w1c_unsupported,
2202 "attempted to W1C CSTS.NSSRO"
2203 " but CAP.NSSRS is zero (not supported)");
2204 } else if (data != 0) {
2205 NVME_GUEST_ERR(pci_nvme_ub_mmiowr_ro_csts,
2206 "attempted to set a read only bit"
2207 " of controller status");
2208 }
2209 break;
2210 case 0x20: /* NSSR */
2211 if (data == 0x4E564D65) {
2212 trace_pci_nvme_ub_mmiowr_ssreset_unsupported();
2213 } else {
2214 /* The spec says that writes of other values have no effect */
2215 return;
2216 }
2217 break;
2218 case 0x24: /* AQA */
2219 n->bar.aqa = data & 0xffffffff;
2220 trace_pci_nvme_mmio_aqattr(data & 0xffffffff);
2221 break;
2222 case 0x28: /* ASQ */
2223 n->bar.asq = data;
2224 trace_pci_nvme_mmio_asqaddr(data);
2225 break;
2226 case 0x2c: /* ASQ hi */
2227 n->bar.asq |= data << 32;
2228 trace_pci_nvme_mmio_asqaddr_hi(data, n->bar.asq);
2229 break;
2230 case 0x30: /* ACQ */
2231 trace_pci_nvme_mmio_acqaddr(data);
2232 n->bar.acq = data;
2233 break;
2234 case 0x34: /* ACQ hi */
2235 n->bar.acq |= data << 32;
2236 trace_pci_nvme_mmio_acqaddr_hi(data, n->bar.acq);
2237 break;
2238 case 0x38: /* CMBLOC */
2239 NVME_GUEST_ERR(pci_nvme_ub_mmiowr_cmbloc_reserved,
2240 "invalid write to reserved CMBLOC"
2241 " when CMBSZ is zero, ignored");
2242 return;
2243 case 0x3C: /* CMBSZ */
2244 NVME_GUEST_ERR(pci_nvme_ub_mmiowr_cmbsz_readonly,
2245 "invalid write to read only CMBSZ, ignored");
2246 return;
2247 case 0xE00: /* PMRCAP */
2248 NVME_GUEST_ERR(pci_nvme_ub_mmiowr_pmrcap_readonly,
2249 "invalid write to PMRCAP register, ignored");
2250 return;
2251 case 0xE04: /* TODO PMRCTL */
2252 break;
2253 case 0xE08: /* PMRSTS */
2254 NVME_GUEST_ERR(pci_nvme_ub_mmiowr_pmrsts_readonly,
2255 "invalid write to PMRSTS register, ignored");
2256 return;
2257 case 0xE0C: /* PMREBS */
2258 NVME_GUEST_ERR(pci_nvme_ub_mmiowr_pmrebs_readonly,
2259 "invalid write to PMREBS register, ignored");
2260 return;
2261 case 0xE10: /* PMRSWTP */
2262 NVME_GUEST_ERR(pci_nvme_ub_mmiowr_pmrswtp_readonly,
2263 "invalid write to PMRSWTP register, ignored");
2264 return;
2265 case 0xE14: /* TODO PMRMSC */
2266 break;
2267 default:
2268 NVME_GUEST_ERR(pci_nvme_ub_mmiowr_invalid,
2269 "invalid MMIO write,"
2270 " offset=0x%"PRIx64", data=%"PRIx64"",
2271 offset, data);
2272 break;
2273 }
2274 }
2275
2276 static uint64_t nvme_mmio_read(void *opaque, hwaddr addr, unsigned size)
2277 {
2278 NvmeCtrl *n = (NvmeCtrl *)opaque;
2279 uint8_t *ptr = (uint8_t *)&n->bar;
2280 uint64_t val = 0;
2281
2282 trace_pci_nvme_mmio_read(addr);
2283
2284 if (unlikely(addr & (sizeof(uint32_t) - 1))) {
2285 NVME_GUEST_ERR(pci_nvme_ub_mmiord_misaligned32,
2286 "MMIO read not 32-bit aligned,"
2287 " offset=0x%"PRIx64"", addr);
2288 /* should RAZ, fall through for now */
2289 } else if (unlikely(size < sizeof(uint32_t))) {
2290 NVME_GUEST_ERR(pci_nvme_ub_mmiord_toosmall,
2291 "MMIO read smaller than 32-bits,"
2292 " offset=0x%"PRIx64"", addr);
2293 /* should RAZ, fall through for now */
2294 }
2295
2296 if (addr < sizeof(n->bar)) {
2297 /*
2298 * When PMRWBM bit 1 is set then read from
2299 * from PMRSTS should ensure prior writes
2300 * made it to persistent media
2301 */
2302 if (addr == 0xE08 &&
2303 (NVME_PMRCAP_PMRWBM(n->bar.pmrcap) & 0x02)) {
2304 memory_region_msync(&n->pmrdev->mr, 0, n->pmrdev->size);
2305 }
2306 memcpy(&val, ptr + addr, size);
2307 } else {
2308 NVME_GUEST_ERR(pci_nvme_ub_mmiord_invalid_ofs,
2309 "MMIO read beyond last register,"
2310 " offset=0x%"PRIx64", returning 0", addr);
2311 }
2312
2313 return val;
2314 }
2315
2316 static void nvme_process_db(NvmeCtrl *n, hwaddr addr, int val)
2317 {
2318 uint32_t qid;
2319
2320 if (unlikely(addr & ((1 << 2) - 1))) {
2321 NVME_GUEST_ERR(pci_nvme_ub_db_wr_misaligned,
2322 "doorbell write not 32-bit aligned,"
2323 " offset=0x%"PRIx64", ignoring", addr);
2324 return;
2325 }
2326
2327 if (((addr - 0x1000) >> 2) & 1) {
2328 /* Completion queue doorbell write */
2329
2330 uint16_t new_head = val & 0xffff;
2331 int start_sqs;
2332 NvmeCQueue *cq;
2333
2334 qid = (addr - (0x1000 + (1 << 2))) >> 3;
2335 if (unlikely(nvme_check_cqid(n, qid))) {
2336 NVME_GUEST_ERR(pci_nvme_ub_db_wr_invalid_cq,
2337 "completion queue doorbell write"
2338 " for nonexistent queue,"
2339 " sqid=%"PRIu32", ignoring", qid);
2340
2341 /*
2342 * NVM Express v1.3d, Section 4.1 state: "If host software writes
2343 * an invalid value to the Submission Queue Tail Doorbell or
2344 * Completion Queue Head Doorbell regiter and an Asynchronous Event
2345 * Request command is outstanding, then an asynchronous event is
2346 * posted to the Admin Completion Queue with a status code of
2347 * Invalid Doorbell Write Value."
2348 *
2349 * Also note that the spec includes the "Invalid Doorbell Register"
2350 * status code, but nowhere does it specify when to use it.
2351 * However, it seems reasonable to use it here in a similar
2352 * fashion.
2353 */
2354 if (n->outstanding_aers) {
2355 nvme_enqueue_event(n, NVME_AER_TYPE_ERROR,
2356 NVME_AER_INFO_ERR_INVALID_DB_REGISTER,
2357 NVME_LOG_ERROR_INFO);
2358 }
2359
2360 return;
2361 }
2362
2363 cq = n->cq[qid];
2364 if (unlikely(new_head >= cq->size)) {
2365 NVME_GUEST_ERR(pci_nvme_ub_db_wr_invalid_cqhead,
2366 "completion queue doorbell write value"
2367 " beyond queue size, sqid=%"PRIu32","
2368 " new_head=%"PRIu16", ignoring",
2369 qid, new_head);
2370
2371 if (n->outstanding_aers) {
2372 nvme_enqueue_event(n, NVME_AER_TYPE_ERROR,
2373 NVME_AER_INFO_ERR_INVALID_DB_VALUE,
2374 NVME_LOG_ERROR_INFO);
2375 }
2376
2377 return;
2378 }
2379
2380 trace_pci_nvme_mmio_doorbell_cq(cq->cqid, new_head);
2381
2382 start_sqs = nvme_cq_full(cq) ? 1 : 0;
2383 cq->head = new_head;
2384 if (start_sqs) {
2385 NvmeSQueue *sq;
2386 QTAILQ_FOREACH(sq, &cq->sq_list, entry) {
2387 timer_mod(sq->timer, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + 500);
2388 }
2389 timer_mod(cq->timer, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + 500);
2390 }
2391
2392 if (cq->tail == cq->head) {
2393 nvme_irq_deassert(n, cq);
2394 }
2395 } else {
2396 /* Submission queue doorbell write */
2397
2398 uint16_t new_tail = val & 0xffff;
2399 NvmeSQueue *sq;
2400
2401 qid = (addr - 0x1000) >> 3;
2402 if (unlikely(nvme_check_sqid(n, qid))) {
2403 NVME_GUEST_ERR(pci_nvme_ub_db_wr_invalid_sq,
2404 "submission queue doorbell write"
2405 " for nonexistent queue,"
2406 " sqid=%"PRIu32", ignoring", qid);
2407
2408 if (n->outstanding_aers) {
2409 nvme_enqueue_event(n, NVME_AER_TYPE_ERROR,
2410 NVME_AER_INFO_ERR_INVALID_DB_REGISTER,
2411 NVME_LOG_ERROR_INFO);
2412 }
2413
2414 return;
2415 }
2416
2417 sq = n->sq[qid];
2418 if (unlikely(new_tail >= sq->size)) {
2419 NVME_GUEST_ERR(pci_nvme_ub_db_wr_invalid_sqtail,
2420 "submission queue doorbell write value"
2421 " beyond queue size, sqid=%"PRIu32","
2422 " new_tail=%"PRIu16", ignoring",
2423 qid, new_tail);
2424
2425 if (n->outstanding_aers) {
2426 nvme_enqueue_event(n, NVME_AER_TYPE_ERROR,
2427 NVME_AER_INFO_ERR_INVALID_DB_VALUE,
2428 NVME_LOG_ERROR_INFO);
2429 }
2430
2431 return;
2432 }
2433
2434 trace_pci_nvme_mmio_doorbell_sq(sq->sqid, new_tail);
2435
2436 sq->tail = new_tail;
2437 timer_mod(sq->timer, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + 500);
2438 }
2439 }
2440
2441 static void nvme_mmio_write(void *opaque, hwaddr addr, uint64_t data,
2442 unsigned size)
2443 {
2444 NvmeCtrl *n = (NvmeCtrl *)opaque;
2445
2446 trace_pci_nvme_mmio_write(addr, data);
2447
2448 if (addr < sizeof(n->bar)) {
2449 nvme_write_bar(n, addr, data, size);
2450 } else {
2451 nvme_process_db(n, addr, data);
2452 }
2453 }
2454
2455 static const MemoryRegionOps nvme_mmio_ops = {
2456 .read = nvme_mmio_read,
2457 .write = nvme_mmio_write,
2458 .endianness = DEVICE_LITTLE_ENDIAN,
2459 .impl = {
2460 .min_access_size = 2,
2461 .max_access_size = 8,
2462 },
2463 };
2464
2465 static void nvme_cmb_write(void *opaque, hwaddr addr, uint64_t data,
2466 unsigned size)
2467 {
2468 NvmeCtrl *n = (NvmeCtrl *)opaque;
2469 stn_le_p(&n->cmbuf[addr], size, data);
2470 }
2471
2472 static uint64_t nvme_cmb_read(void *opaque, hwaddr addr, unsigned size)
2473 {
2474 NvmeCtrl *n = (NvmeCtrl *)opaque;
2475 return ldn_le_p(&n->cmbuf[addr], size);
2476 }
2477
2478 static const MemoryRegionOps nvme_cmb_ops = {
2479 .read = nvme_cmb_read,
2480 .write = nvme_cmb_write,
2481 .endianness = DEVICE_LITTLE_ENDIAN,
2482 .impl = {
2483 .min_access_size = 1,
2484 .max_access_size = 8,
2485 },
2486 };
2487
2488 static void nvme_check_constraints(NvmeCtrl *n, Error **errp)
2489 {
2490 NvmeParams *params = &n->params;
2491
2492 if (params->num_queues) {
2493 warn_report("num_queues is deprecated; please use max_ioqpairs "
2494 "instead");
2495
2496 params->max_ioqpairs = params->num_queues - 1;
2497 }
2498
2499 if (n->conf.blk) {
2500 warn_report("drive property is deprecated; "
2501 "please use an nvme-ns device instead");
2502 }
2503
2504 if (params->max_ioqpairs < 1 ||
2505 params->max_ioqpairs > NVME_MAX_IOQPAIRS) {
2506 error_setg(errp, "max_ioqpairs must be between 1 and %d",
2507 NVME_MAX_IOQPAIRS);
2508 return;
2509 }
2510
2511 if (params->msix_qsize < 1 ||
2512 params->msix_qsize > PCI_MSIX_FLAGS_QSIZE + 1) {
2513 error_setg(errp, "msix_qsize must be between 1 and %d",
2514 PCI_MSIX_FLAGS_QSIZE + 1);
2515 return;
2516 }
2517
2518 if (!params->serial) {
2519 error_setg(errp, "serial property not set");
2520 return;
2521 }
2522
2523 if (!n->params.cmb_size_mb && n->pmrdev) {
2524 if (host_memory_backend_is_mapped(n->pmrdev)) {
2525 error_setg(errp, "can't use already busy memdev: %s",
2526 object_get_canonical_path_component(OBJECT(n->pmrdev)));
2527 return;
2528 }
2529
2530 if (!is_power_of_2(n->pmrdev->size)) {
2531 error_setg(errp, "pmr backend size needs to be power of 2 in size");
2532 return;
2533 }
2534
2535 host_memory_backend_set_mapped(n->pmrdev, true);
2536 }
2537 }
2538
2539 static void nvme_init_state(NvmeCtrl *n)
2540 {
2541 n->num_namespaces = NVME_MAX_NAMESPACES;
2542 /* add one to max_ioqpairs to account for the admin queue pair */
2543 n->reg_size = pow2ceil(sizeof(NvmeBar) +
2544 2 * (n->params.max_ioqpairs + 1) * NVME_DB_SIZE);
2545 n->sq = g_new0(NvmeSQueue *, n->params.max_ioqpairs + 1);
2546 n->cq = g_new0(NvmeCQueue *, n->params.max_ioqpairs + 1);
2547 n->temperature = NVME_TEMPERATURE;
2548 n->features.temp_thresh_hi = NVME_TEMPERATURE_WARNING;
2549 n->starttime_ms = qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL);
2550 n->aer_reqs = g_new0(NvmeRequest *, n->params.aerl + 1);
2551 }
2552
2553 int nvme_register_namespace(NvmeCtrl *n, NvmeNamespace *ns, Error **errp)
2554 {
2555 uint32_t nsid = nvme_nsid(ns);
2556
2557 if (nsid > NVME_MAX_NAMESPACES) {
2558 error_setg(errp, "invalid namespace id (must be between 0 and %d)",
2559 NVME_MAX_NAMESPACES);
2560 return -1;
2561 }
2562
2563 if (!nsid) {
2564 for (int i = 1; i <= n->num_namespaces; i++) {
2565 if (!nvme_ns(n, i)) {
2566 nsid = ns->params.nsid = i;
2567 break;
2568 }
2569 }
2570
2571 if (!nsid) {
2572 error_setg(errp, "no free namespace id");
2573 return -1;
2574 }
2575 } else {
2576 if (n->namespaces[nsid - 1]) {
2577 error_setg(errp, "namespace id '%d' is already in use", nsid);
2578 return -1;
2579 }
2580 }
2581
2582 trace_pci_nvme_register_namespace(nsid);
2583
2584 n->namespaces[nsid - 1] = ns;
2585
2586 return 0;
2587 }
2588
2589 static void nvme_init_cmb(NvmeCtrl *n, PCIDevice *pci_dev)
2590 {
2591 NVME_CMBLOC_SET_BIR(n->bar.cmbloc, NVME_CMB_BIR);
2592 NVME_CMBLOC_SET_OFST(n->bar.cmbloc, 0);
2593
2594 NVME_CMBSZ_SET_SQS(n->bar.cmbsz, 1);
2595 NVME_CMBSZ_SET_CQS(n->bar.cmbsz, 0);
2596 NVME_CMBSZ_SET_LISTS(n->bar.cmbsz, 1);
2597 NVME_CMBSZ_SET_RDS(n->bar.cmbsz, 1);
2598 NVME_CMBSZ_SET_WDS(n->bar.cmbsz, 1);
2599 NVME_CMBSZ_SET_SZU(n->bar.cmbsz, 2); /* MBs */
2600 NVME_CMBSZ_SET_SZ(n->bar.cmbsz, n->params.cmb_size_mb);
2601
2602 n->cmbuf = g_malloc0(NVME_CMBSZ_GETSIZE(n->bar.cmbsz));
2603 memory_region_init_io(&n->ctrl_mem, OBJECT(n), &nvme_cmb_ops, n,
2604 "nvme-cmb", NVME_CMBSZ_GETSIZE(n->bar.cmbsz));
2605 pci_register_bar(pci_dev, NVME_CMBLOC_BIR(n->bar.cmbloc),
2606 PCI_BASE_ADDRESS_SPACE_MEMORY |
2607 PCI_BASE_ADDRESS_MEM_TYPE_64 |
2608 PCI_BASE_ADDRESS_MEM_PREFETCH, &n->ctrl_mem);
2609 }
2610
2611 static void nvme_init_pmr(NvmeCtrl *n, PCIDevice *pci_dev)
2612 {
2613 /* Controller Capabilities register */
2614 NVME_CAP_SET_PMRS(n->bar.cap, 1);
2615
2616 /* PMR Capabities register */
2617 n->bar.pmrcap = 0;
2618 NVME_PMRCAP_SET_RDS(n->bar.pmrcap, 0);
2619 NVME_PMRCAP_SET_WDS(n->bar.pmrcap, 0);
2620 NVME_PMRCAP_SET_BIR(n->bar.pmrcap, NVME_PMR_BIR);
2621 NVME_PMRCAP_SET_PMRTU(n->bar.pmrcap, 0);
2622 /* Turn on bit 1 support */
2623 NVME_PMRCAP_SET_PMRWBM(n->bar.pmrcap, 0x02);
2624 NVME_PMRCAP_SET_PMRTO(n->bar.pmrcap, 0);
2625 NVME_PMRCAP_SET_CMSS(n->bar.pmrcap, 0);
2626
2627 /* PMR Control register */
2628 n->bar.pmrctl = 0;
2629 NVME_PMRCTL_SET_EN(n->bar.pmrctl, 0);
2630
2631 /* PMR Status register */
2632 n->bar.pmrsts = 0;
2633 NVME_PMRSTS_SET_ERR(n->bar.pmrsts, 0);
2634 NVME_PMRSTS_SET_NRDY(n->bar.pmrsts, 0);
2635 NVME_PMRSTS_SET_HSTS(n->bar.pmrsts, 0);
2636 NVME_PMRSTS_SET_CBAI(n->bar.pmrsts, 0);
2637
2638 /* PMR Elasticity Buffer Size register */
2639 n->bar.pmrebs = 0;
2640 NVME_PMREBS_SET_PMRSZU(n->bar.pmrebs, 0);
2641 NVME_PMREBS_SET_RBB(n->bar.pmrebs, 0);
2642 NVME_PMREBS_SET_PMRWBZ(n->bar.pmrebs, 0);
2643
2644 /* PMR Sustained Write Throughput register */
2645 n->bar.pmrswtp = 0;
2646 NVME_PMRSWTP_SET_PMRSWTU(n->bar.pmrswtp, 0);
2647 NVME_PMRSWTP_SET_PMRSWTV(n->bar.pmrswtp, 0);
2648
2649 /* PMR Memory Space Control register */
2650 n->bar.pmrmsc = 0;
2651 NVME_PMRMSC_SET_CMSE(n->bar.pmrmsc, 0);
2652 NVME_PMRMSC_SET_CBA(n->bar.pmrmsc, 0);
2653
2654 pci_register_bar(pci_dev, NVME_PMRCAP_BIR(n->bar.pmrcap),
2655 PCI_BASE_ADDRESS_SPACE_MEMORY |
2656 PCI_BASE_ADDRESS_MEM_TYPE_64 |
2657 PCI_BASE_ADDRESS_MEM_PREFETCH, &n->pmrdev->mr);
2658 }
2659
2660 static void nvme_init_pci(NvmeCtrl *n, PCIDevice *pci_dev, Error **errp)
2661 {
2662 uint8_t *pci_conf = pci_dev->config;
2663
2664 pci_conf[PCI_INTERRUPT_PIN] = 1;
2665 pci_config_set_prog_interface(pci_conf, 0x2);
2666
2667 if (n->params.use_intel_id) {
2668 pci_config_set_vendor_id(pci_conf, PCI_VENDOR_ID_INTEL);
2669 pci_config_set_device_id(pci_conf, 0x5845);
2670 } else {
2671 pci_config_set_vendor_id(pci_conf, PCI_VENDOR_ID_REDHAT);
2672 pci_config_set_device_id(pci_conf, PCI_DEVICE_ID_REDHAT_NVME);
2673 }
2674
2675 pci_config_set_class(pci_conf, PCI_CLASS_STORAGE_EXPRESS);
2676 pcie_endpoint_cap_init(pci_dev, 0x80);
2677
2678 memory_region_init_io(&n->iomem, OBJECT(n), &nvme_mmio_ops, n, "nvme",
2679 n->reg_size);
2680 pci_register_bar(pci_dev, 0, PCI_BASE_ADDRESS_SPACE_MEMORY |
2681 PCI_BASE_ADDRESS_MEM_TYPE_64, &n->iomem);
2682 if (msix_init_exclusive_bar(pci_dev, n->params.msix_qsize, 4, errp)) {
2683 return;
2684 }
2685
2686 if (n->params.cmb_size_mb) {
2687 nvme_init_cmb(n, pci_dev);
2688 } else if (n->pmrdev) {
2689 nvme_init_pmr(n, pci_dev);
2690 }
2691 }
2692
2693 static void nvme_init_ctrl(NvmeCtrl *n, PCIDevice *pci_dev)
2694 {
2695 NvmeIdCtrl *id = &n->id_ctrl;
2696 uint8_t *pci_conf = pci_dev->config;
2697 char *subnqn;
2698
2699 id->vid = cpu_to_le16(pci_get_word(pci_conf + PCI_VENDOR_ID));
2700 id->ssvid = cpu_to_le16(pci_get_word(pci_conf + PCI_SUBSYSTEM_VENDOR_ID));
2701 strpadcpy((char *)id->mn, sizeof(id->mn), "QEMU NVMe Ctrl", ' ');
2702 strpadcpy((char *)id->fr, sizeof(id->fr), "1.0", ' ');
2703 strpadcpy((char *)id->sn, sizeof(id->sn), n->params.serial, ' ');
2704 id->rab = 6;
2705 id->ieee[0] = 0x00;
2706 id->ieee[1] = 0x02;
2707 id->ieee[2] = 0xb3;
2708 id->mdts = n->params.mdts;
2709 id->ver = cpu_to_le32(NVME_SPEC_VER);
2710 id->oacs = cpu_to_le16(0);
2711
2712 /*
2713 * Because the controller always completes the Abort command immediately,
2714 * there can never be more than one concurrently executing Abort command,
2715 * so this value is never used for anything. Note that there can easily be
2716 * many Abort commands in the queues, but they are not considered
2717 * "executing" until processed by nvme_abort.
2718 *
2719 * The specification recommends a value of 3 for Abort Command Limit (four
2720 * concurrently outstanding Abort commands), so lets use that though it is
2721 * inconsequential.
2722 */
2723 id->acl = 3;
2724 id->aerl = n->params.aerl;
2725 id->frmw = (NVME_NUM_FW_SLOTS << 1) | NVME_FRMW_SLOT1_RO;
2726 id->lpa = NVME_LPA_NS_SMART | NVME_LPA_EXTENDED;
2727
2728 /* recommended default value (~70 C) */
2729 id->wctemp = cpu_to_le16(NVME_TEMPERATURE_WARNING);
2730 id->cctemp = cpu_to_le16(NVME_TEMPERATURE_CRITICAL);
2731
2732 id->sqes = (0x6 << 4) | 0x6;
2733 id->cqes = (0x4 << 4) | 0x4;
2734 id->nn = cpu_to_le32(n->num_namespaces);
2735 id->oncs = cpu_to_le16(NVME_ONCS_WRITE_ZEROES | NVME_ONCS_TIMESTAMP |
2736 NVME_ONCS_FEATURES);
2737
2738 id->vwc = 0x1;
2739 id->sgls = cpu_to_le32(NVME_CTRL_SGLS_SUPPORT_NO_ALIGN |
2740 NVME_CTRL_SGLS_BITBUCKET);
2741
2742 subnqn = g_strdup_printf("nqn.2019-08.org.qemu:%s", n->params.serial);
2743 strpadcpy((char *)id->subnqn, sizeof(id->subnqn), subnqn, '\0');
2744 g_free(subnqn);
2745
2746 id->psd[0].mp = cpu_to_le16(0x9c4);
2747 id->psd[0].enlat = cpu_to_le32(0x10);
2748 id->psd[0].exlat = cpu_to_le32(0x4);
2749
2750 n->bar.cap = 0;
2751 NVME_CAP_SET_MQES(n->bar.cap, 0x7ff);
2752 NVME_CAP_SET_CQR(n->bar.cap, 1);
2753 NVME_CAP_SET_TO(n->bar.cap, 0xf);
2754 NVME_CAP_SET_CSS(n->bar.cap, NVME_CAP_CSS_NVM);
2755 NVME_CAP_SET_CSS(n->bar.cap, NVME_CAP_CSS_ADMIN_ONLY);
2756 NVME_CAP_SET_MPSMAX(n->bar.cap, 4);
2757
2758 n->bar.vs = NVME_SPEC_VER;
2759 n->bar.intmc = n->bar.intms = 0;
2760 }
2761
2762 static void nvme_realize(PCIDevice *pci_dev, Error **errp)
2763 {
2764 NvmeCtrl *n = NVME(pci_dev);
2765 NvmeNamespace *ns;
2766 Error *local_err = NULL;
2767
2768 nvme_check_constraints(n, &local_err);
2769 if (local_err) {
2770 error_propagate(errp, local_err);
2771 return;
2772 }
2773
2774 qbus_create_inplace(&n->bus, sizeof(NvmeBus), TYPE_NVME_BUS,
2775 &pci_dev->qdev, n->parent_obj.qdev.id);
2776
2777 nvme_init_state(n);
2778 nvme_init_pci(n, pci_dev, &local_err);
2779 if (local_err) {
2780 error_propagate(errp, local_err);
2781 return;
2782 }
2783
2784 nvme_init_ctrl(n, pci_dev);
2785
2786 /* setup a namespace if the controller drive property was given */
2787 if (n->namespace.blkconf.blk) {
2788 ns = &n->namespace;
2789 ns->params.nsid = 1;
2790
2791 if (nvme_ns_setup(n, ns, errp)) {
2792 return;
2793 }
2794 }
2795 }
2796
2797 static void nvme_exit(PCIDevice *pci_dev)
2798 {
2799 NvmeCtrl *n = NVME(pci_dev);
2800
2801 nvme_clear_ctrl(n);
2802 g_free(n->cq);
2803 g_free(n->sq);
2804 g_free(n->aer_reqs);
2805
2806 if (n->params.cmb_size_mb) {
2807 g_free(n->cmbuf);
2808 }
2809
2810 if (n->pmrdev) {
2811 host_memory_backend_set_mapped(n->pmrdev, false);
2812 }
2813 msix_uninit_exclusive_bar(pci_dev);
2814 }
2815
2816 static Property nvme_props[] = {
2817 DEFINE_BLOCK_PROPERTIES(NvmeCtrl, namespace.blkconf),
2818 DEFINE_PROP_LINK("pmrdev", NvmeCtrl, pmrdev, TYPE_MEMORY_BACKEND,
2819 HostMemoryBackend *),
2820 DEFINE_PROP_STRING("serial", NvmeCtrl, params.serial),
2821 DEFINE_PROP_UINT32("cmb_size_mb", NvmeCtrl, params.cmb_size_mb, 0),
2822 DEFINE_PROP_UINT32("num_queues", NvmeCtrl, params.num_queues, 0),
2823 DEFINE_PROP_UINT32("max_ioqpairs", NvmeCtrl, params.max_ioqpairs, 64),
2824 DEFINE_PROP_UINT16("msix_qsize", NvmeCtrl, params.msix_qsize, 65),
2825 DEFINE_PROP_UINT8("aerl", NvmeCtrl, params.aerl, 3),
2826 DEFINE_PROP_UINT32("aer_max_queued", NvmeCtrl, params.aer_max_queued, 64),
2827 DEFINE_PROP_UINT8("mdts", NvmeCtrl, params.mdts, 7),
2828 DEFINE_PROP_BOOL("use-intel-id", NvmeCtrl, params.use_intel_id, false),
2829 DEFINE_PROP_END_OF_LIST(),
2830 };
2831
2832 static const VMStateDescription nvme_vmstate = {
2833 .name = "nvme",
2834 .unmigratable = 1,
2835 };
2836
2837 static void nvme_class_init(ObjectClass *oc, void *data)
2838 {
2839 DeviceClass *dc = DEVICE_CLASS(oc);
2840 PCIDeviceClass *pc = PCI_DEVICE_CLASS(oc);
2841
2842 pc->realize = nvme_realize;
2843 pc->exit = nvme_exit;
2844 pc->class_id = PCI_CLASS_STORAGE_EXPRESS;
2845 pc->revision = 2;
2846
2847 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
2848 dc->desc = "Non-Volatile Memory Express";
2849 device_class_set_props(dc, nvme_props);
2850 dc->vmsd = &nvme_vmstate;
2851 }
2852
2853 static void nvme_instance_init(Object *obj)
2854 {
2855 NvmeCtrl *s = NVME(obj);
2856
2857 if (s->namespace.blkconf.blk) {
2858 device_add_bootindex_property(obj, &s->namespace.blkconf.bootindex,
2859 "bootindex", "/namespace@1,0",
2860 DEVICE(obj));
2861 }
2862 }
2863
2864 static const TypeInfo nvme_info = {
2865 .name = TYPE_NVME,
2866 .parent = TYPE_PCI_DEVICE,
2867 .instance_size = sizeof(NvmeCtrl),
2868 .instance_init = nvme_instance_init,
2869 .class_init = nvme_class_init,
2870 .interfaces = (InterfaceInfo[]) {
2871 { INTERFACE_PCIE_DEVICE },
2872 { }
2873 },
2874 };
2875
2876 static const TypeInfo nvme_bus_info = {
2877 .name = TYPE_NVME_BUS,
2878 .parent = TYPE_BUS,
2879 .instance_size = sizeof(NvmeBus),
2880 };
2881
2882 static void nvme_register_types(void)
2883 {
2884 type_register_static(&nvme_info);
2885 type_register_static(&nvme_bus_info);
2886 }
2887
2888 type_init(nvme_register_types)
AR7 emulation for QEMU