1// SPDX-License-Identifier: GPL-2.0-only
2// Copyright 2014 Cisco Systems, Inc. All rights reserved.
3
4#include <linux/kernel.h>
5#include <linux/errno.h>
6#include <linux/types.h>
7#include <linux/pci.h>
8#include <linux/delay.h>
9#include <linux/if_ether.h>
10#include <linux/slab.h>
11#include "vnic_resource.h"
12#include "vnic_devcmd.h"
13#include "vnic_dev.h"
14#include "vnic_stats.h"
15#include "vnic_wq.h"
16
17#define VNIC_DVCMD_TMO 10000 /* Devcmd Timeout value */
18#define VNIC_NOTIFY_INTR_MASK 0x0000ffff00000000ULL
19
20struct devcmd2_controller {
21 struct vnic_wq_ctrl __iomem *wq_ctrl;
22 struct vnic_dev_ring results_ring;
23 struct vnic_wq wq;
24 struct vnic_devcmd2 *cmd_ring;
25 struct devcmd2_result *result;
26 u16 next_result;
27 u16 result_size;
28 int color;
29};
30
31struct vnic_res {
32 void __iomem *vaddr;
33 unsigned int count;
34};
35
36struct vnic_dev {
37 void *priv;
38 struct pci_dev *pdev;
39 struct vnic_res res[RES_TYPE_MAX];
40 enum vnic_dev_intr_mode intr_mode;
41 struct vnic_devcmd __iomem *devcmd;
42 struct vnic_devcmd_notify *notify;
43 struct vnic_devcmd_notify notify_copy;
44 dma_addr_t notify_pa;
45 u32 *linkstatus;
46 dma_addr_t linkstatus_pa;
47 struct vnic_stats *stats;
48 dma_addr_t stats_pa;
49 struct vnic_devcmd_fw_info *fw_info;
50 dma_addr_t fw_info_pa;
51 u64 args[VNIC_DEVCMD_NARGS];
52 struct devcmd2_controller *devcmd2;
53
54 int (*devcmd_rtn)(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd,
55 int wait);
56};
57
58#define VNIC_MAX_RES_HDR_SIZE \
59 (sizeof(struct vnic_resource_header) + \
60 sizeof(struct vnic_resource) * RES_TYPE_MAX)
61#define VNIC_RES_STRIDE 128
62
63void *svnic_dev_priv(struct vnic_dev *vdev)
64{
65 return vdev->priv;
66}
67
68static int vnic_dev_discover_res(struct vnic_dev *vdev,
69 struct vnic_dev_bar *bar, unsigned int num_bars)
70{
71 struct vnic_resource_header __iomem *rh;
72 struct vnic_resource __iomem *r;
73 u8 type;
74
75 if (num_bars == 0)
76 return -EINVAL;
77
78 if (bar->len < VNIC_MAX_RES_HDR_SIZE) {
79 pr_err("vNIC BAR0 res hdr length error\n");
80
81 return -EINVAL;
82 }
83
84 rh = bar->vaddr;
85 if (!rh) {
86 pr_err("vNIC BAR0 res hdr not mem-mapped\n");
87
88 return -EINVAL;
89 }
90
91 if (ioread32(&rh->magic) != VNIC_RES_MAGIC ||
92 ioread32(&rh->version) != VNIC_RES_VERSION) {
93 pr_err("vNIC BAR0 res magic/version error exp (%lx/%lx) curr (%x/%x)\n",
94 VNIC_RES_MAGIC, VNIC_RES_VERSION,
95 ioread32(&rh->magic), ioread32(&rh->version));
96
97 return -EINVAL;
98 }
99
100 r = (struct vnic_resource __iomem *)(rh + 1);
101
102 while ((type = ioread8(&r->type)) != RES_TYPE_EOL) {
103
104 u8 bar_num = ioread8(&r->bar);
105 u32 bar_offset = ioread32(&r->bar_offset);
106 u32 count = ioread32(&r->count);
107 u32 len;
108
109 r++;
110
111 if (bar_num >= num_bars)
112 continue;
113
114 if (!bar[bar_num].len || !bar[bar_num].vaddr)
115 continue;
116
117 switch (type) {
118 case RES_TYPE_WQ:
119 case RES_TYPE_RQ:
120 case RES_TYPE_CQ:
121 case RES_TYPE_INTR_CTRL:
122 /* each count is stride bytes long */
123 len = count * VNIC_RES_STRIDE;
124 if (len + bar_offset > bar->len) {
125 pr_err("vNIC BAR0 resource %d out-of-bounds, offset 0x%x + size 0x%x > bar len 0x%lx\n",
126 type, bar_offset,
127 len,
128 bar->len);
129
130 return -EINVAL;
131 }
132 break;
133
134 case RES_TYPE_INTR_PBA_LEGACY:
135 case RES_TYPE_DEVCMD:
136 case RES_TYPE_DEVCMD2:
137 len = count;
138 break;
139
140 default:
141 continue;
142 }
143
144 vdev->res[type].count = count;
145 vdev->res[type].vaddr = (char __iomem *)bar->vaddr + bar_offset;
146 }
147
148 return 0;
149}
150
151unsigned int svnic_dev_get_res_count(struct vnic_dev *vdev,
152 enum vnic_res_type type)
153{
154 return vdev->res[type].count;
155}
156
157void __iomem *svnic_dev_get_res(struct vnic_dev *vdev, enum vnic_res_type type,
158 unsigned int index)
159{
160 if (!vdev->res[type].vaddr)
161 return NULL;
162
163 switch (type) {
164 case RES_TYPE_WQ:
165 case RES_TYPE_RQ:
166 case RES_TYPE_CQ:
167 case RES_TYPE_INTR_CTRL:
168 return (char __iomem *)vdev->res[type].vaddr +
169 index * VNIC_RES_STRIDE;
170
171 default:
172 return (char __iomem *)vdev->res[type].vaddr;
173 }
174}
175
176unsigned int svnic_dev_desc_ring_size(struct vnic_dev_ring *ring,
177 unsigned int desc_count,
178 unsigned int desc_size)
179{
180 /* The base address of the desc rings must be 512 byte aligned.
181 * Descriptor count is aligned to groups of 32 descriptors. A
182 * count of 0 means the maximum 4096 descriptors. Descriptor
183 * size is aligned to 16 bytes.
184 */
185
186 unsigned int count_align = 32;
187 unsigned int desc_align = 16;
188
189 ring->base_align = 512;
190
191 if (desc_count == 0)
192 desc_count = 4096;
193
194 ring->desc_count = ALIGN(desc_count, count_align);
195
196 ring->desc_size = ALIGN(desc_size, desc_align);
197
198 ring->size = ring->desc_count * ring->desc_size;
199 ring->size_unaligned = ring->size + ring->base_align;
200
201 return ring->size_unaligned;
202}
203
204void svnic_dev_clear_desc_ring(struct vnic_dev_ring *ring)
205{
206 memset(ring->descs, 0, ring->size);
207}
208
209int svnic_dev_alloc_desc_ring(struct vnic_dev *vdev, struct vnic_dev_ring *ring,
210 unsigned int desc_count, unsigned int desc_size)
211{
212 svnic_dev_desc_ring_size(ring, desc_count, desc_size);
213
214 ring->descs_unaligned = dma_alloc_coherent(dev: &vdev->pdev->dev,
215 size: ring->size_unaligned, dma_handle: &ring->base_addr_unaligned,
216 GFP_KERNEL);
217 if (!ring->descs_unaligned) {
218 pr_err("Failed to allocate ring (size=%d), aborting\n",
219 (int)ring->size);
220
221 return -ENOMEM;
222 }
223
224 ring->base_addr = ALIGN(ring->base_addr_unaligned,
225 ring->base_align);
226 ring->descs = (u8 *)ring->descs_unaligned +
227 (ring->base_addr - ring->base_addr_unaligned);
228
229 svnic_dev_clear_desc_ring(ring);
230
231 ring->desc_avail = ring->desc_count - 1;
232
233 return 0;
234}
235
236void svnic_dev_free_desc_ring(struct vnic_dev *vdev, struct vnic_dev_ring *ring)
237{
238 if (ring->descs) {
239 dma_free_coherent(dev: &vdev->pdev->dev,
240 size: ring->size_unaligned,
241 cpu_addr: ring->descs_unaligned,
242 dma_handle: ring->base_addr_unaligned);
243 ring->descs = NULL;
244 }
245}
246
247static int _svnic_dev_cmd2(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd,
248 int wait)
249{
250 struct devcmd2_controller *dc2c = vdev->devcmd2;
251 struct devcmd2_result *result = NULL;
252 unsigned int i;
253 int delay;
254 int err;
255 u32 posted;
256 u32 fetch_idx;
257 u32 new_posted;
258 u8 color;
259
260 fetch_idx = ioread32(&dc2c->wq_ctrl->fetch_index);
261 if (fetch_idx == 0xFFFFFFFF) { /* check for hardware gone */
262 /* Hardware surprise removal: return error */
263 return -ENODEV;
264 }
265
266 posted = ioread32(&dc2c->wq_ctrl->posted_index);
267
268 if (posted == 0xFFFFFFFF) { /* check for hardware gone */
269 /* Hardware surprise removal: return error */
270 return -ENODEV;
271 }
272
273 new_posted = (posted + 1) % DEVCMD2_RING_SIZE;
274 if (new_posted == fetch_idx) {
275 pr_err("%s: wq is full while issuing devcmd2 command %d, fetch index: %u, posted index: %u\n",
276 pci_name(vdev->pdev), _CMD_N(cmd), fetch_idx, posted);
277
278 return -EBUSY;
279 }
280
281 dc2c->cmd_ring[posted].cmd = cmd;
282 dc2c->cmd_ring[posted].flags = 0;
283
284 if ((_CMD_FLAGS(cmd) & _CMD_FLAGS_NOWAIT))
285 dc2c->cmd_ring[posted].flags |= DEVCMD2_FNORESULT;
286
287 if (_CMD_DIR(cmd) & _CMD_DIR_WRITE) {
288 for (i = 0; i < VNIC_DEVCMD_NARGS; i++)
289 dc2c->cmd_ring[posted].args[i] = vdev->args[i];
290 }
291 /* Adding write memory barrier prevents compiler and/or CPU
292 * reordering, thus avoiding descriptor posting before
293 * descriptor is initialized. Otherwise, hardware can read
294 * stale descriptor fields.
295 */
296 wmb();
297 iowrite32(new_posted, &dc2c->wq_ctrl->posted_index);
298
299 if (dc2c->cmd_ring[posted].flags & DEVCMD2_FNORESULT)
300 return 0;
301
302 result = dc2c->result + dc2c->next_result;
303 color = dc2c->color;
304
305 /*
306 * Increment next_result, after posting the devcmd, irrespective of
307 * devcmd result, and it should be done only once.
308 */
309 dc2c->next_result++;
310 if (dc2c->next_result == dc2c->result_size) {
311 dc2c->next_result = 0;
312 dc2c->color = dc2c->color ? 0 : 1;
313 }
314
315 for (delay = 0; delay < wait; delay++) {
316 udelay(100);
317 if (result->color == color) {
318 if (result->error) {
319 err = (int) result->error;
320 if (err != ERR_ECMDUNKNOWN ||
321 cmd != CMD_CAPABILITY)
322 pr_err("Error %d devcmd %d\n",
323 err, _CMD_N(cmd));
324
325 return err;
326 }
327 if (_CMD_DIR(cmd) & _CMD_DIR_READ) {
328 for (i = 0; i < VNIC_DEVCMD_NARGS; i++)
329 vdev->args[i] = result->results[i];
330 }
331
332 return 0;
333 }
334 }
335
336 pr_err("Timed out devcmd %d\n", _CMD_N(cmd));
337
338 return -ETIMEDOUT;
339}
340
341static int svnic_dev_init_devcmd2(struct vnic_dev *vdev)
342{
343 struct devcmd2_controller *dc2c = NULL;
344 unsigned int fetch_idx;
345 int ret;
346 void __iomem *p;
347
348 if (vdev->devcmd2)
349 return 0;
350
351 p = svnic_dev_get_res(vdev, type: RES_TYPE_DEVCMD2, index: 0);
352 if (!p)
353 return -ENODEV;
354
355 dc2c = kzalloc(size: sizeof(*dc2c), GFP_ATOMIC);
356 if (!dc2c)
357 return -ENOMEM;
358
359 vdev->devcmd2 = dc2c;
360
361 dc2c->color = 1;
362 dc2c->result_size = DEVCMD2_RING_SIZE;
363
364 ret = vnic_wq_devcmd2_alloc(vdev,
365 wq: &dc2c->wq,
366 DEVCMD2_RING_SIZE,
367 DEVCMD2_DESC_SIZE);
368 if (ret)
369 goto err_free_devcmd2;
370
371 fetch_idx = ioread32(&dc2c->wq.ctrl->fetch_index);
372 if (fetch_idx == 0xFFFFFFFF) { /* check for hardware gone */
373 /* Hardware surprise removal: reset fetch_index */
374 fetch_idx = 0;
375 }
376
377 /*
378 * Don't change fetch_index ever and
379 * set posted_index same as fetch_index
380 * when setting up the WQ for devcmd2.
381 */
382 vnic_wq_init_start(wq: &dc2c->wq, cq_index: 0, fetch_index: fetch_idx, post_index: fetch_idx, error_interrupt_enable: 0, error_interrupt_offset: 0);
383 svnic_wq_enable(wq: &dc2c->wq);
384 ret = svnic_dev_alloc_desc_ring(vdev,
385 ring: &dc2c->results_ring,
386 DEVCMD2_RING_SIZE,
387 DEVCMD2_DESC_SIZE);
388 if (ret)
389 goto err_free_wq;
390
391 dc2c->result = (struct devcmd2_result *) dc2c->results_ring.descs;
392 dc2c->cmd_ring = (struct vnic_devcmd2 *) dc2c->wq.ring.descs;
393 dc2c->wq_ctrl = dc2c->wq.ctrl;
394 vdev->args[0] = (u64) dc2c->results_ring.base_addr | VNIC_PADDR_TARGET;
395 vdev->args[1] = DEVCMD2_RING_SIZE;
396
397 ret = _svnic_dev_cmd2(vdev, cmd: CMD_INITIALIZE_DEVCMD2, VNIC_DVCMD_TMO);
398 if (ret < 0)
399 goto err_free_desc_ring;
400
401 vdev->devcmd_rtn = &_svnic_dev_cmd2;
402 pr_info("DEVCMD2 Initialized.\n");
403
404 return ret;
405
406err_free_desc_ring:
407 svnic_dev_free_desc_ring(vdev, ring: &dc2c->results_ring);
408
409err_free_wq:
410 svnic_wq_disable(wq: &dc2c->wq);
411 svnic_wq_free(wq: &dc2c->wq);
412
413err_free_devcmd2:
414 kfree(objp: dc2c);
415 vdev->devcmd2 = NULL;
416
417 return ret;
418} /* end of svnic_dev_init_devcmd2 */
419
420static void vnic_dev_deinit_devcmd2(struct vnic_dev *vdev)
421{
422 struct devcmd2_controller *dc2c = vdev->devcmd2;
423
424 vdev->devcmd2 = NULL;
425 vdev->devcmd_rtn = NULL;
426
427 svnic_dev_free_desc_ring(vdev, ring: &dc2c->results_ring);
428 svnic_wq_disable(wq: &dc2c->wq);
429 svnic_wq_free(wq: &dc2c->wq);
430 kfree(objp: dc2c);
431}
432
433int svnic_dev_cmd(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd,
434 u64 *a0, u64 *a1, int wait)
435{
436 int err;
437
438 memset(vdev->args, 0, sizeof(vdev->args));
439 vdev->args[0] = *a0;
440 vdev->args[1] = *a1;
441
442 err = (*vdev->devcmd_rtn)(vdev, cmd, wait);
443
444 *a0 = vdev->args[0];
445 *a1 = vdev->args[1];
446
447 return err;
448}
449
450int svnic_dev_fw_info(struct vnic_dev *vdev,
451 struct vnic_devcmd_fw_info **fw_info)
452{
453 u64 a0, a1 = 0;
454 int wait = VNIC_DVCMD_TMO;
455 int err = 0;
456
457 if (!vdev->fw_info) {
458 vdev->fw_info = dma_alloc_coherent(dev: &vdev->pdev->dev,
459 size: sizeof(struct vnic_devcmd_fw_info),
460 dma_handle: &vdev->fw_info_pa, GFP_KERNEL);
461 if (!vdev->fw_info)
462 return -ENOMEM;
463
464 a0 = vdev->fw_info_pa;
465
466 /* only get fw_info once and cache it */
467 err = svnic_dev_cmd(vdev, cmd: CMD_MCPU_FW_INFO, a0: &a0, a1: &a1, wait);
468 }
469
470 *fw_info = vdev->fw_info;
471
472 return err;
473}
474
475int svnic_dev_spec(struct vnic_dev *vdev, unsigned int offset,
476 unsigned int size, void *value)
477{
478 u64 a0, a1;
479 int wait = VNIC_DVCMD_TMO;
480 int err;
481
482 a0 = offset;
483 a1 = size;
484
485 err = svnic_dev_cmd(vdev, cmd: CMD_DEV_SPEC, a0: &a0, a1: &a1, wait);
486
487 switch (size) {
488 case 1:
489 *(u8 *)value = (u8)a0;
490 break;
491 case 2:
492 *(u16 *)value = (u16)a0;
493 break;
494 case 4:
495 *(u32 *)value = (u32)a0;
496 break;
497 case 8:
498 *(u64 *)value = a0;
499 break;
500 default:
501 BUG();
502 break;
503 }
504
505 return err;
506}
507
508int svnic_dev_stats_clear(struct vnic_dev *vdev)
509{
510 u64 a0 = 0, a1 = 0;
511 int wait = VNIC_DVCMD_TMO;
512
513 return svnic_dev_cmd(vdev, cmd: CMD_STATS_CLEAR, a0: &a0, a1: &a1, wait);
514}
515
516int svnic_dev_stats_dump(struct vnic_dev *vdev, struct vnic_stats **stats)
517{
518 u64 a0, a1;
519 int wait = VNIC_DVCMD_TMO;
520
521 if (!vdev->stats) {
522 vdev->stats = dma_alloc_coherent(dev: &vdev->pdev->dev,
523 size: sizeof(struct vnic_stats), dma_handle: &vdev->stats_pa, GFP_KERNEL);
524 if (!vdev->stats)
525 return -ENOMEM;
526 }
527
528 *stats = vdev->stats;
529 a0 = vdev->stats_pa;
530 a1 = sizeof(struct vnic_stats);
531
532 return svnic_dev_cmd(vdev, cmd: CMD_STATS_DUMP, a0: &a0, a1: &a1, wait);
533}
534
535int svnic_dev_close(struct vnic_dev *vdev)
536{
537 u64 a0 = 0, a1 = 0;
538 int wait = VNIC_DVCMD_TMO;
539
540 return svnic_dev_cmd(vdev, cmd: CMD_CLOSE, a0: &a0, a1: &a1, wait);
541}
542
543int svnic_dev_enable_wait(struct vnic_dev *vdev)
544{
545 u64 a0 = 0, a1 = 0;
546 int wait = VNIC_DVCMD_TMO;
547 int err = 0;
548
549 err = svnic_dev_cmd(vdev, cmd: CMD_ENABLE_WAIT, a0: &a0, a1: &a1, wait);
550 if (err == ERR_ECMDUNKNOWN)
551 return svnic_dev_cmd(vdev, cmd: CMD_ENABLE, a0: &a0, a1: &a1, wait);
552
553 return err;
554}
555
556int svnic_dev_disable(struct vnic_dev *vdev)
557{
558 u64 a0 = 0, a1 = 0;
559 int wait = VNIC_DVCMD_TMO;
560
561 return svnic_dev_cmd(vdev, cmd: CMD_DISABLE, a0: &a0, a1: &a1, wait);
562}
563
564int svnic_dev_open(struct vnic_dev *vdev, int arg)
565{
566 u64 a0 = (u32)arg, a1 = 0;
567 int wait = VNIC_DVCMD_TMO;
568
569 return svnic_dev_cmd(vdev, cmd: CMD_OPEN, a0: &a0, a1: &a1, wait);
570}
571
572int svnic_dev_open_done(struct vnic_dev *vdev, int *done)
573{
574 u64 a0 = 0, a1 = 0;
575 int wait = VNIC_DVCMD_TMO;
576 int err;
577
578 *done = 0;
579
580 err = svnic_dev_cmd(vdev, cmd: CMD_OPEN_STATUS, a0: &a0, a1: &a1, wait);
581 if (err)
582 return err;
583
584 *done = (a0 == 0);
585
586 return 0;
587}
588
589int svnic_dev_notify_set(struct vnic_dev *vdev, u16 intr)
590{
591 u64 a0, a1;
592 int wait = VNIC_DVCMD_TMO;
593
594 if (!vdev->notify) {
595 vdev->notify = dma_alloc_coherent(dev: &vdev->pdev->dev,
596 size: sizeof(struct vnic_devcmd_notify),
597 dma_handle: &vdev->notify_pa, GFP_KERNEL);
598 if (!vdev->notify)
599 return -ENOMEM;
600 }
601
602 a0 = vdev->notify_pa;
603 a1 = ((u64)intr << 32) & VNIC_NOTIFY_INTR_MASK;
604 a1 += sizeof(struct vnic_devcmd_notify);
605
606 return svnic_dev_cmd(vdev, cmd: CMD_NOTIFY, a0: &a0, a1: &a1, wait);
607}
608
609void svnic_dev_notify_unset(struct vnic_dev *vdev)
610{
611 u64 a0, a1;
612 int wait = VNIC_DVCMD_TMO;
613
614 a0 = 0; /* paddr = 0 to unset notify buffer */
615 a1 = VNIC_NOTIFY_INTR_MASK; /* intr num = -1 to unreg for intr */
616 a1 += sizeof(struct vnic_devcmd_notify);
617
618 svnic_dev_cmd(vdev, cmd: CMD_NOTIFY, a0: &a0, a1: &a1, wait);
619}
620
621static int vnic_dev_notify_ready(struct vnic_dev *vdev)
622{
623 u32 *words;
624 unsigned int nwords = sizeof(struct vnic_devcmd_notify) / 4;
625 unsigned int i;
626 u32 csum;
627
628 if (!vdev->notify)
629 return 0;
630
631 do {
632 csum = 0;
633 memcpy(&vdev->notify_copy, vdev->notify,
634 sizeof(struct vnic_devcmd_notify));
635 words = (u32 *)&vdev->notify_copy;
636 for (i = 1; i < nwords; i++)
637 csum += words[i];
638 } while (csum != words[0]);
639
640 return 1;
641}
642
643int svnic_dev_init(struct vnic_dev *vdev, int arg)
644{
645 u64 a0 = (u32)arg, a1 = 0;
646 int wait = VNIC_DVCMD_TMO;
647
648 return svnic_dev_cmd(vdev, cmd: CMD_INIT, a0: &a0, a1: &a1, wait);
649}
650
651int svnic_dev_link_status(struct vnic_dev *vdev)
652{
653 if (vdev->linkstatus)
654 return *vdev->linkstatus;
655
656 if (!vnic_dev_notify_ready(vdev))
657 return 0;
658
659 return vdev->notify_copy.link_state;
660}
661
662u32 svnic_dev_link_down_cnt(struct vnic_dev *vdev)
663{
664 if (!vnic_dev_notify_ready(vdev))
665 return 0;
666
667 return vdev->notify_copy.link_down_cnt;
668}
669
670void svnic_dev_set_intr_mode(struct vnic_dev *vdev,
671 enum vnic_dev_intr_mode intr_mode)
672{
673 vdev->intr_mode = intr_mode;
674}
675
676enum vnic_dev_intr_mode svnic_dev_get_intr_mode(struct vnic_dev *vdev)
677{
678 return vdev->intr_mode;
679}
680
681void svnic_dev_unregister(struct vnic_dev *vdev)
682{
683 if (vdev) {
684 if (vdev->notify)
685 dma_free_coherent(dev: &vdev->pdev->dev,
686 size: sizeof(struct vnic_devcmd_notify),
687 cpu_addr: vdev->notify,
688 dma_handle: vdev->notify_pa);
689 if (vdev->linkstatus)
690 dma_free_coherent(dev: &vdev->pdev->dev,
691 size: sizeof(u32),
692 cpu_addr: vdev->linkstatus,
693 dma_handle: vdev->linkstatus_pa);
694 if (vdev->stats)
695 dma_free_coherent(dev: &vdev->pdev->dev,
696 size: sizeof(struct vnic_stats),
697 cpu_addr: vdev->stats, dma_handle: vdev->stats_pa);
698 if (vdev->fw_info)
699 dma_free_coherent(dev: &vdev->pdev->dev,
700 size: sizeof(struct vnic_devcmd_fw_info),
701 cpu_addr: vdev->fw_info, dma_handle: vdev->fw_info_pa);
702 if (vdev->devcmd2)
703 vnic_dev_deinit_devcmd2(vdev);
704 kfree(objp: vdev);
705 }
706}
707
708struct vnic_dev *svnic_dev_alloc_discover(struct vnic_dev *vdev,
709 void *priv,
710 struct pci_dev *pdev,
711 struct vnic_dev_bar *bar,
712 unsigned int num_bars)
713{
714 if (!vdev) {
715 vdev = kzalloc(size: sizeof(struct vnic_dev), GFP_ATOMIC);
716 if (!vdev)
717 return NULL;
718 }
719
720 vdev->priv = priv;
721 vdev->pdev = pdev;
722
723 if (vnic_dev_discover_res(vdev, bar, num_bars))
724 goto err_out;
725
726 return vdev;
727
728err_out:
729 svnic_dev_unregister(vdev);
730
731 return NULL;
732} /* end of svnic_dev_alloc_discover */
733
734/*
735 * fallback option is left to keep the interface common for other vnics.
736 */
737int svnic_dev_cmd_init(struct vnic_dev *vdev, int fallback)
738{
739 int err = -ENODEV;
740 void __iomem *p;
741
742 p = svnic_dev_get_res(vdev, type: RES_TYPE_DEVCMD2, index: 0);
743 if (p)
744 err = svnic_dev_init_devcmd2(vdev);
745 else
746 pr_err("DEVCMD2 resource not found.\n");
747
748 return err;
749} /* end of svnic_dev_cmd_init */
750

source code of linux/drivers/scsi/snic/vnic_dev.c