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7#include <common.h>
8#include <blk.h>
9#include <cpu_func.h>
10#include <dm.h>
11#include <errno.h>
12#include <log.h>
13#include <malloc.h>
14#include <memalign.h>
15#include <pci.h>
16#include <time.h>
17#include <dm/device-internal.h>
18#include <linux/compat.h>
19#include "nvme.h"
20
21#define NVME_Q_DEPTH 2
22#define NVME_AQ_DEPTH 2
23#define NVME_SQ_SIZE(depth) (depth * sizeof(struct nvme_command))
24#define NVME_CQ_SIZE(depth) (depth * sizeof(struct nvme_completion))
25#define NVME_CQ_ALLOCATION ALIGN(NVME_CQ_SIZE(NVME_Q_DEPTH), \
26 ARCH_DMA_MINALIGN)
27#define ADMIN_TIMEOUT 60
28#define IO_TIMEOUT 30
29#define MAX_PRP_POOL 512
30
31enum nvme_queue_id {
32 NVME_ADMIN_Q,
33 NVME_IO_Q,
34 NVME_Q_NUM,
35};
36
37
38
39
40
41struct nvme_queue {
42 struct nvme_dev *dev;
43 struct nvme_command *sq_cmds;
44 struct nvme_completion *cqes;
45 wait_queue_head_t sq_full;
46 u32 __iomem *q_db;
47 u16 q_depth;
48 s16 cq_vector;
49 u16 sq_head;
50 u16 sq_tail;
51 u16 cq_head;
52 u16 qid;
53 u8 cq_phase;
54 u8 cqe_seen;
55 unsigned long cmdid_data[];
56};
57
58static int nvme_wait_ready(struct nvme_dev *dev, bool enabled)
59{
60 u32 bit = enabled ? NVME_CSTS_RDY : 0;
61 int timeout;
62 ulong start;
63
64
65 timeout = NVME_CAP_TIMEOUT(dev->cap) * 500;
66
67 start = get_timer(0);
68 while (get_timer(start) < timeout) {
69 if ((readl(&dev->bar->csts) & NVME_CSTS_RDY) == bit)
70 return 0;
71 }
72
73 return -ETIME;
74}
75
76static int nvme_setup_prps(struct nvme_dev *dev, u64 *prp2,
77 int total_len, u64 dma_addr)
78{
79 u32 page_size = dev->page_size;
80 int offset = dma_addr & (page_size - 1);
81 u64 *prp_pool;
82 int length = total_len;
83 int i, nprps;
84 u32 prps_per_page = page_size >> 3;
85 u32 num_pages;
86
87 length -= (page_size - offset);
88
89 if (length <= 0) {
90 *prp2 = 0;
91 return 0;
92 }
93
94 if (length)
95 dma_addr += (page_size - offset);
96
97 if (length <= page_size) {
98 *prp2 = dma_addr;
99 return 0;
100 }
101
102 nprps = DIV_ROUND_UP(length, page_size);
103 num_pages = DIV_ROUND_UP(nprps, prps_per_page);
104
105 if (nprps > dev->prp_entry_num) {
106 free(dev->prp_pool);
107
108
109
110
111 dev->prp_pool = memalign(page_size, num_pages * page_size);
112 if (!dev->prp_pool) {
113 printf("Error: malloc prp_pool fail\n");
114 return -ENOMEM;
115 }
116 dev->prp_entry_num = prps_per_page * num_pages;
117 }
118
119 prp_pool = dev->prp_pool;
120 i = 0;
121 while (nprps) {
122 if (i == ((page_size >> 3) - 1)) {
123 *(prp_pool + i) = cpu_to_le64((ulong)prp_pool +
124 page_size);
125 i = 0;
126 prp_pool += page_size;
127 }
128 *(prp_pool + i++) = cpu_to_le64(dma_addr);
129 dma_addr += page_size;
130 nprps--;
131 }
132 *prp2 = (ulong)dev->prp_pool;
133
134 flush_dcache_range((ulong)dev->prp_pool, (ulong)dev->prp_pool +
135 dev->prp_entry_num * sizeof(u64));
136
137 return 0;
138}
139
140static __le16 nvme_get_cmd_id(void)
141{
142 static unsigned short cmdid;
143
144 return cpu_to_le16((cmdid < USHRT_MAX) ? cmdid++ : 0);
145}
146
147static u16 nvme_read_completion_status(struct nvme_queue *nvmeq, u16 index)
148{
149
150
151
152
153
154
155 ulong start = (ulong)&nvmeq->cqes[0];
156 ulong stop = start + NVME_CQ_ALLOCATION;
157
158 invalidate_dcache_range(start, stop);
159
160 return readw(&(nvmeq->cqes[index].status));
161}
162
163
164
165
166
167
168
169static void nvme_submit_cmd(struct nvme_queue *nvmeq, struct nvme_command *cmd)
170{
171 u16 tail = nvmeq->sq_tail;
172
173 memcpy(&nvmeq->sq_cmds[tail], cmd, sizeof(*cmd));
174 flush_dcache_range((ulong)&nvmeq->sq_cmds[tail],
175 (ulong)&nvmeq->sq_cmds[tail] + sizeof(*cmd));
176
177 if (++tail == nvmeq->q_depth)
178 tail = 0;
179 writel(tail, nvmeq->q_db);
180 nvmeq->sq_tail = tail;
181}
182
183static int nvme_submit_sync_cmd(struct nvme_queue *nvmeq,
184 struct nvme_command *cmd,
185 u32 *result, unsigned timeout)
186{
187 u16 head = nvmeq->cq_head;
188 u16 phase = nvmeq->cq_phase;
189 u16 status;
190 ulong start_time;
191 ulong timeout_us = timeout * 100000;
192
193 cmd->common.command_id = nvme_get_cmd_id();
194 nvme_submit_cmd(nvmeq, cmd);
195
196 start_time = timer_get_us();
197
198 for (;;) {
199 status = nvme_read_completion_status(nvmeq, head);
200 if ((status & 0x01) == phase)
201 break;
202 if (timeout_us > 0 && (timer_get_us() - start_time)
203 >= timeout_us)
204 return -ETIMEDOUT;
205 }
206
207 status >>= 1;
208 if (status) {
209 printf("ERROR: status = %x, phase = %d, head = %d\n",
210 status, phase, head);
211 status = 0;
212 if (++head == nvmeq->q_depth) {
213 head = 0;
214 phase = !phase;
215 }
216 writel(head, nvmeq->q_db + nvmeq->dev->db_stride);
217 nvmeq->cq_head = head;
218 nvmeq->cq_phase = phase;
219
220 return -EIO;
221 }
222
223 if (result)
224 *result = readl(&(nvmeq->cqes[head].result));
225
226 if (++head == nvmeq->q_depth) {
227 head = 0;
228 phase = !phase;
229 }
230 writel(head, nvmeq->q_db + nvmeq->dev->db_stride);
231 nvmeq->cq_head = head;
232 nvmeq->cq_phase = phase;
233
234 return status;
235}
236
237static int nvme_submit_admin_cmd(struct nvme_dev *dev, struct nvme_command *cmd,
238 u32 *result)
239{
240 return nvme_submit_sync_cmd(dev->queues[NVME_ADMIN_Q], cmd,
241 result, ADMIN_TIMEOUT);
242}
243
244static struct nvme_queue *nvme_alloc_queue(struct nvme_dev *dev,
245 int qid, int depth)
246{
247 struct nvme_queue *nvmeq = malloc(sizeof(*nvmeq));
248 if (!nvmeq)
249 return NULL;
250 memset(nvmeq, 0, sizeof(*nvmeq));
251
252 nvmeq->cqes = (void *)memalign(4096, NVME_CQ_ALLOCATION);
253 if (!nvmeq->cqes)
254 goto free_nvmeq;
255 memset((void *)nvmeq->cqes, 0, NVME_CQ_SIZE(depth));
256
257 nvmeq->sq_cmds = (void *)memalign(4096, NVME_SQ_SIZE(depth));
258 if (!nvmeq->sq_cmds)
259 goto free_queue;
260 memset((void *)nvmeq->sq_cmds, 0, NVME_SQ_SIZE(depth));
261
262 nvmeq->dev = dev;
263
264 nvmeq->cq_head = 0;
265 nvmeq->cq_phase = 1;
266 nvmeq->q_db = &dev->dbs[qid * 2 * dev->db_stride];
267 nvmeq->q_depth = depth;
268 nvmeq->qid = qid;
269 dev->queue_count++;
270 dev->queues[qid] = nvmeq;
271
272 return nvmeq;
273
274 free_queue:
275 free((void *)nvmeq->cqes);
276 free_nvmeq:
277 free(nvmeq);
278
279 return NULL;
280}
281
282static int nvme_delete_queue(struct nvme_dev *dev, u8 opcode, u16 id)
283{
284 struct nvme_command c;
285
286 memset(&c, 0, sizeof(c));
287 c.delete_queue.opcode = opcode;
288 c.delete_queue.qid = cpu_to_le16(id);
289
290 return nvme_submit_admin_cmd(dev, &c, NULL);
291}
292
293static int nvme_delete_sq(struct nvme_dev *dev, u16 sqid)
294{
295 return nvme_delete_queue(dev, nvme_admin_delete_sq, sqid);
296}
297
298static int nvme_delete_cq(struct nvme_dev *dev, u16 cqid)
299{
300 return nvme_delete_queue(dev, nvme_admin_delete_cq, cqid);
301}
302
303static int nvme_enable_ctrl(struct nvme_dev *dev)
304{
305 dev->ctrl_config &= ~NVME_CC_SHN_MASK;
306 dev->ctrl_config |= NVME_CC_ENABLE;
307 writel(dev->ctrl_config, &dev->bar->cc);
308
309 return nvme_wait_ready(dev, true);
310}
311
312static int nvme_disable_ctrl(struct nvme_dev *dev)
313{
314 dev->ctrl_config &= ~NVME_CC_SHN_MASK;
315 dev->ctrl_config &= ~NVME_CC_ENABLE;
316 writel(dev->ctrl_config, &dev->bar->cc);
317
318 return nvme_wait_ready(dev, false);
319}
320
321static void nvme_free_queue(struct nvme_queue *nvmeq)
322{
323 free((void *)nvmeq->cqes);
324 free(nvmeq->sq_cmds);
325 free(nvmeq);
326}
327
328static void nvme_free_queues(struct nvme_dev *dev, int lowest)
329{
330 int i;
331
332 for (i = dev->queue_count - 1; i >= lowest; i--) {
333 struct nvme_queue *nvmeq = dev->queues[i];
334 dev->queue_count--;
335 dev->queues[i] = NULL;
336 nvme_free_queue(nvmeq);
337 }
338}
339
340static void nvme_init_queue(struct nvme_queue *nvmeq, u16 qid)
341{
342 struct nvme_dev *dev = nvmeq->dev;
343
344 nvmeq->sq_tail = 0;
345 nvmeq->cq_head = 0;
346 nvmeq->cq_phase = 1;
347 nvmeq->q_db = &dev->dbs[qid * 2 * dev->db_stride];
348 memset((void *)nvmeq->cqes, 0, NVME_CQ_SIZE(nvmeq->q_depth));
349 flush_dcache_range((ulong)nvmeq->cqes,
350 (ulong)nvmeq->cqes + NVME_CQ_ALLOCATION);
351 dev->online_queues++;
352}
353
354static int nvme_configure_admin_queue(struct nvme_dev *dev)
355{
356 int result;
357 u32 aqa;
358 u64 cap = dev->cap;
359 struct nvme_queue *nvmeq;
360
361 unsigned page_shift = 12;
362 unsigned dev_page_min = NVME_CAP_MPSMIN(cap) + 12;
363 unsigned dev_page_max = NVME_CAP_MPSMAX(cap) + 12;
364
365 if (page_shift < dev_page_min) {
366 debug("Device minimum page size (%u) too large for host (%u)\n",
367 1 << dev_page_min, 1 << page_shift);
368 return -ENODEV;
369 }
370
371 if (page_shift > dev_page_max) {
372 debug("Device maximum page size (%u) smaller than host (%u)\n",
373 1 << dev_page_max, 1 << page_shift);
374 page_shift = dev_page_max;
375 }
376
377 result = nvme_disable_ctrl(dev);
378 if (result < 0)
379 return result;
380
381 nvmeq = dev->queues[NVME_ADMIN_Q];
382 if (!nvmeq) {
383 nvmeq = nvme_alloc_queue(dev, 0, NVME_AQ_DEPTH);
384 if (!nvmeq)
385 return -ENOMEM;
386 }
387
388 aqa = nvmeq->q_depth - 1;
389 aqa |= aqa << 16;
390
391 dev->page_size = 1 << page_shift;
392
393 dev->ctrl_config = NVME_CC_CSS_NVM;
394 dev->ctrl_config |= (page_shift - 12) << NVME_CC_MPS_SHIFT;
395 dev->ctrl_config |= NVME_CC_ARB_RR | NVME_CC_SHN_NONE;
396 dev->ctrl_config |= NVME_CC_IOSQES | NVME_CC_IOCQES;
397
398 writel(aqa, &dev->bar->aqa);
399 nvme_writeq((ulong)nvmeq->sq_cmds, &dev->bar->asq);
400 nvme_writeq((ulong)nvmeq->cqes, &dev->bar->acq);
401
402 result = nvme_enable_ctrl(dev);
403 if (result)
404 goto free_nvmeq;
405
406 nvmeq->cq_vector = 0;
407
408 nvme_init_queue(dev->queues[NVME_ADMIN_Q], 0);
409
410 return result;
411
412 free_nvmeq:
413 nvme_free_queues(dev, 0);
414
415 return result;
416}
417
418static int nvme_alloc_cq(struct nvme_dev *dev, u16 qid,
419 struct nvme_queue *nvmeq)
420{
421 struct nvme_command c;
422 int flags = NVME_QUEUE_PHYS_CONTIG | NVME_CQ_IRQ_ENABLED;
423
424 memset(&c, 0, sizeof(c));
425 c.create_cq.opcode = nvme_admin_create_cq;
426 c.create_cq.prp1 = cpu_to_le64((ulong)nvmeq->cqes);
427 c.create_cq.cqid = cpu_to_le16(qid);
428 c.create_cq.qsize = cpu_to_le16(nvmeq->q_depth - 1);
429 c.create_cq.cq_flags = cpu_to_le16(flags);
430 c.create_cq.irq_vector = cpu_to_le16(nvmeq->cq_vector);
431
432 return nvme_submit_admin_cmd(dev, &c, NULL);
433}
434
435static int nvme_alloc_sq(struct nvme_dev *dev, u16 qid,
436 struct nvme_queue *nvmeq)
437{
438 struct nvme_command c;
439 int flags = NVME_QUEUE_PHYS_CONTIG | NVME_SQ_PRIO_MEDIUM;
440
441 memset(&c, 0, sizeof(c));
442 c.create_sq.opcode = nvme_admin_create_sq;
443 c.create_sq.prp1 = cpu_to_le64((ulong)nvmeq->sq_cmds);
444 c.create_sq.sqid = cpu_to_le16(qid);
445 c.create_sq.qsize = cpu_to_le16(nvmeq->q_depth - 1);
446 c.create_sq.sq_flags = cpu_to_le16(flags);
447 c.create_sq.cqid = cpu_to_le16(qid);
448
449 return nvme_submit_admin_cmd(dev, &c, NULL);
450}
451
452int nvme_identify(struct nvme_dev *dev, unsigned nsid,
453 unsigned cns, dma_addr_t dma_addr)
454{
455 struct nvme_command c;
456 u32 page_size = dev->page_size;
457 int offset = dma_addr & (page_size - 1);
458 int length = sizeof(struct nvme_id_ctrl);
459 int ret;
460
461 memset(&c, 0, sizeof(c));
462 c.identify.opcode = nvme_admin_identify;
463 c.identify.nsid = cpu_to_le32(nsid);
464 c.identify.prp1 = cpu_to_le64(dma_addr);
465
466 length -= (page_size - offset);
467 if (length <= 0) {
468 c.identify.prp2 = 0;
469 } else {
470 dma_addr += (page_size - offset);
471 c.identify.prp2 = cpu_to_le64(dma_addr);
472 }
473
474 c.identify.cns = cpu_to_le32(cns);
475
476 invalidate_dcache_range(dma_addr,
477 dma_addr + sizeof(struct nvme_id_ctrl));
478
479 ret = nvme_submit_admin_cmd(dev, &c, NULL);
480 if (!ret)
481 invalidate_dcache_range(dma_addr,
482 dma_addr + sizeof(struct nvme_id_ctrl));
483
484 return ret;
485}
486
487int nvme_get_features(struct nvme_dev *dev, unsigned fid, unsigned nsid,
488 dma_addr_t dma_addr, u32 *result)
489{
490 struct nvme_command c;
491 int ret;
492
493 memset(&c, 0, sizeof(c));
494 c.features.opcode = nvme_admin_get_features;
495 c.features.nsid = cpu_to_le32(nsid);
496 c.features.prp1 = cpu_to_le64(dma_addr);
497 c.features.fid = cpu_to_le32(fid);
498
499 ret = nvme_submit_admin_cmd(dev, &c, result);
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511
512 return ret;
513}
514
515int nvme_set_features(struct nvme_dev *dev, unsigned fid, unsigned dword11,
516 dma_addr_t dma_addr, u32 *result)
517{
518 struct nvme_command c;
519
520 memset(&c, 0, sizeof(c));
521 c.features.opcode = nvme_admin_set_features;
522 c.features.prp1 = cpu_to_le64(dma_addr);
523 c.features.fid = cpu_to_le32(fid);
524 c.features.dword11 = cpu_to_le32(dword11);
525
526
527
528
529
530
531
532
533
534
535
536
537 return nvme_submit_admin_cmd(dev, &c, result);
538}
539
540static int nvme_create_queue(struct nvme_queue *nvmeq, int qid)
541{
542 struct nvme_dev *dev = nvmeq->dev;
543 int result;
544
545 nvmeq->cq_vector = qid - 1;
546 result = nvme_alloc_cq(dev, qid, nvmeq);
547 if (result < 0)
548 goto release_cq;
549
550 result = nvme_alloc_sq(dev, qid, nvmeq);
551 if (result < 0)
552 goto release_sq;
553
554 nvme_init_queue(nvmeq, qid);
555
556 return result;
557
558 release_sq:
559 nvme_delete_sq(dev, qid);
560 release_cq:
561 nvme_delete_cq(dev, qid);
562
563 return result;
564}
565
566static int nvme_set_queue_count(struct nvme_dev *dev, int count)
567{
568 int status;
569 u32 result;
570 u32 q_count = (count - 1) | ((count - 1) << 16);
571
572 status = nvme_set_features(dev, NVME_FEAT_NUM_QUEUES,
573 q_count, 0, &result);
574
575 if (status < 0)
576 return status;
577 if (status > 1)
578 return 0;
579
580 return min(result & 0xffff, result >> 16) + 1;
581}
582
583static void nvme_create_io_queues(struct nvme_dev *dev)
584{
585 unsigned int i;
586
587 for (i = dev->queue_count; i <= dev->max_qid; i++)
588 if (!nvme_alloc_queue(dev, i, dev->q_depth))
589 break;
590
591 for (i = dev->online_queues; i <= dev->queue_count - 1; i++)
592 if (nvme_create_queue(dev->queues[i], i))
593 break;
594}
595
596static int nvme_setup_io_queues(struct nvme_dev *dev)
597{
598 int nr_io_queues;
599 int result;
600
601 nr_io_queues = 1;
602 result = nvme_set_queue_count(dev, nr_io_queues);
603 if (result <= 0)
604 return result;
605
606 dev->max_qid = nr_io_queues;
607
608
609 nvme_free_queues(dev, nr_io_queues + 1);
610 nvme_create_io_queues(dev);
611
612 return 0;
613}
614
615static int nvme_get_info_from_identify(struct nvme_dev *dev)
616{
617 struct nvme_id_ctrl *ctrl;
618 int ret;
619 int shift = NVME_CAP_MPSMIN(dev->cap) + 12;
620
621 ctrl = memalign(dev->page_size, sizeof(struct nvme_id_ctrl));
622 if (!ctrl)
623 return -ENOMEM;
624
625 ret = nvme_identify(dev, 0, 1, (dma_addr_t)(long)ctrl);
626 if (ret) {
627 free(ctrl);
628 return -EIO;
629 }
630
631 dev->nn = le32_to_cpu(ctrl->nn);
632 dev->vwc = ctrl->vwc;
633 memcpy(dev->serial, ctrl->sn, sizeof(ctrl->sn));
634 memcpy(dev->model, ctrl->mn, sizeof(ctrl->mn));
635 memcpy(dev->firmware_rev, ctrl->fr, sizeof(ctrl->fr));
636 if (ctrl->mdts)
637 dev->max_transfer_shift = (ctrl->mdts + shift);
638 else {
639
640
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643
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649
650
651
652
653
654
655
656
657 dev->max_transfer_shift = 20;
658 }
659
660 free(ctrl);
661 return 0;
662}
663
664int nvme_get_namespace_id(struct udevice *udev, u32 *ns_id, u8 *eui64)
665{
666 struct nvme_ns *ns = dev_get_priv(udev);
667
668 if (ns_id)
669 *ns_id = ns->ns_id;
670 if (eui64)
671 memcpy(eui64, ns->eui64, sizeof(ns->eui64));
672
673 return 0;
674}
675
676int nvme_scan_namespace(void)
677{
678 struct uclass *uc;
679 struct udevice *dev;
680 int ret;
681
682 ret = uclass_get(UCLASS_NVME, &uc);
683 if (ret)
684 return ret;
685
686 uclass_foreach_dev(dev, uc) {
687 ret = device_probe(dev);
688 if (ret)
689 return ret;
690 }
691
692 return 0;
693}
694
695static int nvme_blk_probe(struct udevice *udev)
696{
697 struct nvme_dev *ndev = dev_get_priv(udev->parent);
698 struct blk_desc *desc = dev_get_uclass_plat(udev);
699 struct nvme_ns *ns = dev_get_priv(udev);
700 u8 flbas;
701 struct pci_child_plat *pplat;
702 struct nvme_id_ns *id;
703
704 id = memalign(ndev->page_size, sizeof(struct nvme_id_ns));
705 if (!id)
706 return -ENOMEM;
707
708 ns->dev = ndev;
709
710 ns->ns_id = trailing_strtol(udev->name);
711 if (nvme_identify(ndev, ns->ns_id, 0, (dma_addr_t)(long)id)) {
712 free(id);
713 return -EIO;
714 }
715
716 memcpy(&ns->eui64, &id->eui64, sizeof(id->eui64));
717 flbas = id->flbas & NVME_NS_FLBAS_LBA_MASK;
718 ns->flbas = flbas;
719 ns->lba_shift = id->lbaf[flbas].ds;
720 list_add(&ns->list, &ndev->namespaces);
721
722 desc->lba = le64_to_cpu(id->nsze);
723 desc->log2blksz = ns->lba_shift;
724 desc->blksz = 1 << ns->lba_shift;
725 desc->bdev = udev;
726 pplat = dev_get_parent_plat(udev->parent);
727 sprintf(desc->vendor, "0x%.4x", pplat->vendor);
728 memcpy(desc->product, ndev->serial, sizeof(ndev->serial));
729 memcpy(desc->revision, ndev->firmware_rev, sizeof(ndev->firmware_rev));
730
731 free(id);
732 return 0;
733}
734
735static ulong nvme_blk_rw(struct udevice *udev, lbaint_t blknr,
736 lbaint_t blkcnt, void *buffer, bool read)
737{
738 struct nvme_ns *ns = dev_get_priv(udev);
739 struct nvme_dev *dev = ns->dev;
740 struct nvme_command c;
741 struct blk_desc *desc = dev_get_uclass_plat(udev);
742 int status;
743 u64 prp2;
744 u64 total_len = blkcnt << desc->log2blksz;
745 u64 temp_len = total_len;
746 uintptr_t temp_buffer = (uintptr_t)buffer;
747
748 u64 slba = blknr;
749 u16 lbas = 1 << (dev->max_transfer_shift - ns->lba_shift);
750 u64 total_lbas = blkcnt;
751
752 flush_dcache_range((unsigned long)buffer,
753 (unsigned long)buffer + total_len);
754
755 c.rw.opcode = read ? nvme_cmd_read : nvme_cmd_write;
756 c.rw.flags = 0;
757 c.rw.nsid = cpu_to_le32(ns->ns_id);
758 c.rw.control = 0;
759 c.rw.dsmgmt = 0;
760 c.rw.reftag = 0;
761 c.rw.apptag = 0;
762 c.rw.appmask = 0;
763 c.rw.metadata = 0;
764
765 while (total_lbas) {
766 if (total_lbas < lbas) {
767 lbas = (u16)total_lbas;
768 total_lbas = 0;
769 } else {
770 total_lbas -= lbas;
771 }
772
773 if (nvme_setup_prps(dev, &prp2,
774 lbas << ns->lba_shift, temp_buffer))
775 return -EIO;
776 c.rw.slba = cpu_to_le64(slba);
777 slba += lbas;
778 c.rw.length = cpu_to_le16(lbas - 1);
779 c.rw.prp1 = cpu_to_le64(temp_buffer);
780 c.rw.prp2 = cpu_to_le64(prp2);
781 status = nvme_submit_sync_cmd(dev->queues[NVME_IO_Q],
782 &c, NULL, IO_TIMEOUT);
783 if (status)
784 break;
785 temp_len -= (u32)lbas << ns->lba_shift;
786 temp_buffer += lbas << ns->lba_shift;
787 }
788
789 if (read)
790 invalidate_dcache_range((unsigned long)buffer,
791 (unsigned long)buffer + total_len);
792
793 return (total_len - temp_len) >> desc->log2blksz;
794}
795
796static ulong nvme_blk_read(struct udevice *udev, lbaint_t blknr,
797 lbaint_t blkcnt, void *buffer)
798{
799 return nvme_blk_rw(udev, blknr, blkcnt, buffer, true);
800}
801
802static ulong nvme_blk_write(struct udevice *udev, lbaint_t blknr,
803 lbaint_t blkcnt, const void *buffer)
804{
805 return nvme_blk_rw(udev, blknr, blkcnt, (void *)buffer, false);
806}
807
808static const struct blk_ops nvme_blk_ops = {
809 .read = nvme_blk_read,
810 .write = nvme_blk_write,
811};
812
813U_BOOT_DRIVER(nvme_blk) = {
814 .name = "nvme-blk",
815 .id = UCLASS_BLK,
816 .probe = nvme_blk_probe,
817 .ops = &nvme_blk_ops,
818 .priv_auto = sizeof(struct nvme_ns),
819};
820
821static int nvme_bind(struct udevice *udev)
822{
823 static int ndev_num;
824 char name[20];
825
826 sprintf(name, "nvme#%d", ndev_num++);
827
828 return device_set_name(udev, name);
829}
830
831static int nvme_probe(struct udevice *udev)
832{
833 int ret;
834 struct nvme_dev *ndev = dev_get_priv(udev);
835 struct nvme_id_ns *id;
836
837 ndev->instance = trailing_strtol(udev->name);
838
839 INIT_LIST_HEAD(&ndev->namespaces);
840 ndev->bar = dm_pci_map_bar(udev, PCI_BASE_ADDRESS_0,
841 PCI_REGION_MEM);
842 if (readl(&ndev->bar->csts) == -1) {
843 ret = -ENODEV;
844 printf("Error: %s: Out of memory!\n", udev->name);
845 goto free_nvme;
846 }
847
848 ndev->queues = malloc(NVME_Q_NUM * sizeof(struct nvme_queue *));
849 if (!ndev->queues) {
850 ret = -ENOMEM;
851 printf("Error: %s: Out of memory!\n", udev->name);
852 goto free_nvme;
853 }
854 memset(ndev->queues, 0, NVME_Q_NUM * sizeof(struct nvme_queue *));
855
856 ndev->cap = nvme_readq(&ndev->bar->cap);
857 ndev->q_depth = min_t(int, NVME_CAP_MQES(ndev->cap) + 1, NVME_Q_DEPTH);
858 ndev->db_stride = 1 << NVME_CAP_STRIDE(ndev->cap);
859 ndev->dbs = ((void __iomem *)ndev->bar) + 4096;
860
861 ret = nvme_configure_admin_queue(ndev);
862 if (ret)
863 goto free_queue;
864
865
866 ndev->prp_pool = memalign(ndev->page_size, MAX_PRP_POOL);
867 if (!ndev->prp_pool) {
868 ret = -ENOMEM;
869 printf("Error: %s: Out of memory!\n", udev->name);
870 goto free_nvme;
871 }
872 ndev->prp_entry_num = MAX_PRP_POOL >> 3;
873
874 ret = nvme_setup_io_queues(ndev);
875 if (ret)
876 goto free_queue;
877
878 nvme_get_info_from_identify(ndev);
879
880
881
882 id = memalign(ndev->page_size, sizeof(struct nvme_id_ns));
883 if (!id) {
884 ret = -ENOMEM;
885 goto free_queue;
886 }
887
888 for (int i = 1; i <= ndev->nn; i++) {
889 struct udevice *ns_udev;
890 char name[20];
891
892 memset(id, 0, sizeof(*id));
893 if (nvme_identify(ndev, i, 0, (dma_addr_t)(long)id)) {
894 ret = -EIO;
895 goto free_id;
896 }
897
898
899 if (!id->nsze)
900 continue;
901
902
903
904
905
906 sprintf(name, "blk#%d", i);
907
908
909 ret = blk_create_devicef(udev, "nvme-blk", name, IF_TYPE_NVME,
910 -1, 512, 0, &ns_udev);
911 if (ret)
912 goto free_id;
913 }
914
915 free(id);
916 return 0;
917
918free_id:
919 free(id);
920free_queue:
921 free((void *)ndev->queues);
922free_nvme:
923 return ret;
924}
925
926U_BOOT_DRIVER(nvme) = {
927 .name = "nvme",
928 .id = UCLASS_NVME,
929 .bind = nvme_bind,
930 .probe = nvme_probe,
931 .priv_auto = sizeof(struct nvme_dev),
932};
933
934struct pci_device_id nvme_supported[] = {
935 { PCI_DEVICE_CLASS(PCI_CLASS_STORAGE_EXPRESS, ~0) },
936 {}
937};
938
939U_BOOT_PCI_DEVICE(nvme, nvme_supported);
940