blob: 9795d6f3e1974e47e98f6d28ef80f1e4f282e528 [file] [log] [blame]
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -07001/*
2 * Copyright 2008 Cisco Systems, Inc. All rights reserved.
3 * Copyright 2007 Nuova Systems, Inc. All rights reserved.
4 *
5 * This program is free software; you may redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; version 2 of the License.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
10 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
11 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
12 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
13 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
14 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
15 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
16 * SOFTWARE.
17 */
18
19#include <linux/kernel.h>
20#include <linux/errno.h>
21#include <linux/types.h>
22#include <linux/pci.h>
23#include <linux/delay.h>
24#include <linux/if_ether.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090025#include <linux/slab.h>
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -070026#include "vnic_resource.h"
27#include "vnic_devcmd.h"
28#include "vnic_dev.h"
29#include "vnic_stats.h"
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};
52
53#define VNIC_MAX_RES_HDR_SIZE \
54 (sizeof(struct vnic_resource_header) + \
55 sizeof(struct vnic_resource) * RES_TYPE_MAX)
56#define VNIC_RES_STRIDE 128
57
58void *vnic_dev_priv(struct vnic_dev *vdev)
59{
60 return vdev->priv;
61}
62
63static int vnic_dev_discover_res(struct vnic_dev *vdev,
64 struct vnic_dev_bar *bar)
65{
66 struct vnic_resource_header __iomem *rh;
67 struct vnic_resource __iomem *r;
68 u8 type;
69
70 if (bar->len < VNIC_MAX_RES_HDR_SIZE) {
71 printk(KERN_ERR "vNIC BAR0 res hdr length error\n");
72 return -EINVAL;
73 }
74
75 rh = bar->vaddr;
76 if (!rh) {
77 printk(KERN_ERR "vNIC BAR0 res hdr not mem-mapped\n");
78 return -EINVAL;
79 }
80
81 if (ioread32(&rh->magic) != VNIC_RES_MAGIC ||
82 ioread32(&rh->version) != VNIC_RES_VERSION) {
83 printk(KERN_ERR "vNIC BAR0 res magic/version error "
84 "exp (%lx/%lx) curr (%x/%x)\n",
85 VNIC_RES_MAGIC, VNIC_RES_VERSION,
86 ioread32(&rh->magic), ioread32(&rh->version));
87 return -EINVAL;
88 }
89
90 r = (struct vnic_resource __iomem *)(rh + 1);
91
92 while ((type = ioread8(&r->type)) != RES_TYPE_EOL) {
93
94 u8 bar_num = ioread8(&r->bar);
95 u32 bar_offset = ioread32(&r->bar_offset);
96 u32 count = ioread32(&r->count);
97 u32 len;
98
99 r++;
100
101 if (bar_num != 0) /* only mapping in BAR0 resources */
102 continue;
103
104 switch (type) {
105 case RES_TYPE_WQ:
106 case RES_TYPE_RQ:
107 case RES_TYPE_CQ:
108 case RES_TYPE_INTR_CTRL:
109 /* each count is stride bytes long */
110 len = count * VNIC_RES_STRIDE;
111 if (len + bar_offset > bar->len) {
112 printk(KERN_ERR "vNIC BAR0 resource %d "
113 "out-of-bounds, offset 0x%x + "
114 "size 0x%x > bar len 0x%lx\n",
115 type, bar_offset,
116 len,
117 bar->len);
118 return -EINVAL;
119 }
120 break;
121 case RES_TYPE_INTR_PBA_LEGACY:
122 case RES_TYPE_DEVCMD:
123 len = count;
124 break;
125 default:
126 continue;
127 }
128
129 vdev->res[type].count = count;
130 vdev->res[type].vaddr = (char __iomem *)bar->vaddr + bar_offset;
131 }
132
133 return 0;
134}
135
136unsigned int vnic_dev_get_res_count(struct vnic_dev *vdev,
137 enum vnic_res_type type)
138{
139 return vdev->res[type].count;
140}
141
142void __iomem *vnic_dev_get_res(struct vnic_dev *vdev, enum vnic_res_type type,
143 unsigned int index)
144{
145 if (!vdev->res[type].vaddr)
146 return NULL;
147
148 switch (type) {
149 case RES_TYPE_WQ:
150 case RES_TYPE_RQ:
151 case RES_TYPE_CQ:
152 case RES_TYPE_INTR_CTRL:
153 return (char __iomem *)vdev->res[type].vaddr +
154 index * VNIC_RES_STRIDE;
155 default:
156 return (char __iomem *)vdev->res[type].vaddr;
157 }
158}
159
160unsigned int vnic_dev_desc_ring_size(struct vnic_dev_ring *ring,
161 unsigned int desc_count,
162 unsigned int desc_size)
163{
164 /* The base address of the desc rings must be 512 byte aligned.
165 * Descriptor count is aligned to groups of 32 descriptors. A
166 * count of 0 means the maximum 4096 descriptors. Descriptor
167 * size is aligned to 16 bytes.
168 */
169
170 unsigned int count_align = 32;
171 unsigned int desc_align = 16;
172
173 ring->base_align = 512;
174
175 if (desc_count == 0)
176 desc_count = 4096;
177
178 ring->desc_count = ALIGN(desc_count, count_align);
179
180 ring->desc_size = ALIGN(desc_size, desc_align);
181
182 ring->size = ring->desc_count * ring->desc_size;
183 ring->size_unaligned = ring->size + ring->base_align;
184
185 return ring->size_unaligned;
186}
187
188void vnic_dev_clear_desc_ring(struct vnic_dev_ring *ring)
189{
190 memset(ring->descs, 0, ring->size);
191}
192
193int vnic_dev_alloc_desc_ring(struct vnic_dev *vdev, struct vnic_dev_ring *ring,
194 unsigned int desc_count, unsigned int desc_size)
195{
196 vnic_dev_desc_ring_size(ring, desc_count, desc_size);
197
198 ring->descs_unaligned = pci_alloc_consistent(vdev->pdev,
199 ring->size_unaligned,
200 &ring->base_addr_unaligned);
201
202 if (!ring->descs_unaligned) {
203 printk(KERN_ERR
204 "Failed to allocate ring (size=%d), aborting\n",
205 (int)ring->size);
206 return -ENOMEM;
207 }
208
209 ring->base_addr = ALIGN(ring->base_addr_unaligned,
210 ring->base_align);
211 ring->descs = (u8 *)ring->descs_unaligned +
212 (ring->base_addr - ring->base_addr_unaligned);
213
214 vnic_dev_clear_desc_ring(ring);
215
216 ring->desc_avail = ring->desc_count - 1;
217
218 return 0;
219}
220
221void vnic_dev_free_desc_ring(struct vnic_dev *vdev, struct vnic_dev_ring *ring)
222{
223 if (ring->descs) {
224 pci_free_consistent(vdev->pdev,
225 ring->size_unaligned,
226 ring->descs_unaligned,
227 ring->base_addr_unaligned);
228 ring->descs = NULL;
229 }
230}
231
232int vnic_dev_cmd(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd,
233 u64 *a0, u64 *a1, int wait)
234{
235 struct vnic_devcmd __iomem *devcmd = vdev->devcmd;
236 int delay;
237 u32 status;
238 int dev_cmd_err[] = {
239 /* convert from fw's version of error.h to host's version */
240 0, /* ERR_SUCCESS */
241 EINVAL, /* ERR_EINVAL */
242 EFAULT, /* ERR_EFAULT */
243 EPERM, /* ERR_EPERM */
244 EBUSY, /* ERR_EBUSY */
245 };
246 int err;
247
248 status = ioread32(&devcmd->status);
249 if (status & STAT_BUSY) {
250 printk(KERN_ERR "Busy devcmd %d\n", _CMD_N(cmd));
251 return -EBUSY;
252 }
253
254 if (_CMD_DIR(cmd) & _CMD_DIR_WRITE) {
255 writeq(*a0, &devcmd->args[0]);
256 writeq(*a1, &devcmd->args[1]);
257 wmb();
258 }
259
260 iowrite32(cmd, &devcmd->cmd);
261
262 if ((_CMD_FLAGS(cmd) & _CMD_FLAGS_NOWAIT))
263 return 0;
264
265 for (delay = 0; delay < wait; delay++) {
266
267 udelay(100);
268
269 status = ioread32(&devcmd->status);
270 if (!(status & STAT_BUSY)) {
271
272 if (status & STAT_ERROR) {
273 err = dev_cmd_err[(int)readq(&devcmd->args[0])];
274 printk(KERN_ERR "Error %d devcmd %d\n",
275 err, _CMD_N(cmd));
276 return -err;
277 }
278
279 if (_CMD_DIR(cmd) & _CMD_DIR_READ) {
280 rmb();
281 *a0 = readq(&devcmd->args[0]);
282 *a1 = readq(&devcmd->args[1]);
283 }
284
285 return 0;
286 }
287 }
288
289 printk(KERN_ERR "Timedout devcmd %d\n", _CMD_N(cmd));
290 return -ETIMEDOUT;
291}
292
293int vnic_dev_fw_info(struct vnic_dev *vdev,
294 struct vnic_devcmd_fw_info **fw_info)
295{
296 u64 a0, a1 = 0;
297 int wait = 1000;
298 int err = 0;
299
300 if (!vdev->fw_info) {
301 vdev->fw_info = pci_alloc_consistent(vdev->pdev,
302 sizeof(struct vnic_devcmd_fw_info),
303 &vdev->fw_info_pa);
304 if (!vdev->fw_info)
305 return -ENOMEM;
306
307 a0 = vdev->fw_info_pa;
308
309 /* only get fw_info once and cache it */
310 err = vnic_dev_cmd(vdev, CMD_MCPU_FW_INFO, &a0, &a1, wait);
311 }
312
313 *fw_info = vdev->fw_info;
314
315 return err;
316}
317
318int vnic_dev_spec(struct vnic_dev *vdev, unsigned int offset, unsigned int size,
319 void *value)
320{
321 u64 a0, a1;
322 int wait = 1000;
323 int err;
324
325 a0 = offset;
326 a1 = size;
327
328 err = vnic_dev_cmd(vdev, CMD_DEV_SPEC, &a0, &a1, wait);
329
330 switch (size) {
331 case 1:
332 *(u8 *)value = (u8)a0;
333 break;
334 case 2:
335 *(u16 *)value = (u16)a0;
336 break;
337 case 4:
338 *(u32 *)value = (u32)a0;
339 break;
340 case 8:
341 *(u64 *)value = a0;
342 break;
343 default:
344 BUG();
345 break;
346 }
347
348 return err;
349}
350
351int vnic_dev_stats_clear(struct vnic_dev *vdev)
352{
353 u64 a0 = 0, a1 = 0;
354 int wait = 1000;
355 return vnic_dev_cmd(vdev, CMD_STATS_CLEAR, &a0, &a1, wait);
356}
357
358int vnic_dev_stats_dump(struct vnic_dev *vdev, struct vnic_stats **stats)
359{
360 u64 a0, a1;
361 int wait = 1000;
362
363 if (!vdev->stats) {
364 vdev->stats = pci_alloc_consistent(vdev->pdev,
365 sizeof(struct vnic_stats), &vdev->stats_pa);
366 if (!vdev->stats)
367 return -ENOMEM;
368 }
369
370 *stats = vdev->stats;
371 a0 = vdev->stats_pa;
372 a1 = sizeof(struct vnic_stats);
373
374 return vnic_dev_cmd(vdev, CMD_STATS_DUMP, &a0, &a1, wait);
375}
376
377int vnic_dev_close(struct vnic_dev *vdev)
378{
379 u64 a0 = 0, a1 = 0;
380 int wait = 1000;
381 return vnic_dev_cmd(vdev, CMD_CLOSE, &a0, &a1, wait);
382}
383
384int vnic_dev_enable(struct vnic_dev *vdev)
385{
386 u64 a0 = 0, a1 = 0;
387 int wait = 1000;
388 return vnic_dev_cmd(vdev, CMD_ENABLE, &a0, &a1, wait);
389}
390
391int vnic_dev_disable(struct vnic_dev *vdev)
392{
393 u64 a0 = 0, a1 = 0;
394 int wait = 1000;
395 return vnic_dev_cmd(vdev, CMD_DISABLE, &a0, &a1, wait);
396}
397
398int vnic_dev_open(struct vnic_dev *vdev, int arg)
399{
400 u64 a0 = (u32)arg, a1 = 0;
401 int wait = 1000;
402 return vnic_dev_cmd(vdev, CMD_OPEN, &a0, &a1, wait);
403}
404
405int vnic_dev_open_done(struct vnic_dev *vdev, int *done)
406{
407 u64 a0 = 0, a1 = 0;
408 int wait = 1000;
409 int err;
410
411 *done = 0;
412
413 err = vnic_dev_cmd(vdev, CMD_OPEN_STATUS, &a0, &a1, wait);
414 if (err)
415 return err;
416
417 *done = (a0 == 0);
418
419 return 0;
420}
421
422int vnic_dev_soft_reset(struct vnic_dev *vdev, int arg)
423{
424 u64 a0 = (u32)arg, a1 = 0;
425 int wait = 1000;
426 return vnic_dev_cmd(vdev, CMD_SOFT_RESET, &a0, &a1, wait);
427}
428
429int vnic_dev_soft_reset_done(struct vnic_dev *vdev, int *done)
430{
431 u64 a0 = 0, a1 = 0;
432 int wait = 1000;
433 int err;
434
435 *done = 0;
436
437 err = vnic_dev_cmd(vdev, CMD_SOFT_RESET_STATUS, &a0, &a1, wait);
438 if (err)
439 return err;
440
441 *done = (a0 == 0);
442
443 return 0;
444}
445
446int vnic_dev_hang_notify(struct vnic_dev *vdev)
447{
448 u64 a0, a1;
449 int wait = 1000;
450 return vnic_dev_cmd(vdev, CMD_HANG_NOTIFY, &a0, &a1, wait);
451}
452
453int vnic_dev_mac_addr(struct vnic_dev *vdev, u8 *mac_addr)
454{
455 u64 a0, a1;
456 int wait = 1000;
457 int err, i;
458
459 for (i = 0; i < ETH_ALEN; i++)
460 mac_addr[i] = 0;
461
462 err = vnic_dev_cmd(vdev, CMD_MAC_ADDR, &a0, &a1, wait);
463 if (err)
464 return err;
465
466 for (i = 0; i < ETH_ALEN; i++)
467 mac_addr[i] = ((u8 *)&a0)[i];
468
469 return 0;
470}
471
472void vnic_dev_packet_filter(struct vnic_dev *vdev, int directed, int multicast,
473 int broadcast, int promisc, int allmulti)
474{
475 u64 a0, a1 = 0;
476 int wait = 1000;
477 int err;
478
479 a0 = (directed ? CMD_PFILTER_DIRECTED : 0) |
480 (multicast ? CMD_PFILTER_MULTICAST : 0) |
481 (broadcast ? CMD_PFILTER_BROADCAST : 0) |
482 (promisc ? CMD_PFILTER_PROMISCUOUS : 0) |
483 (allmulti ? CMD_PFILTER_ALL_MULTICAST : 0);
484
485 err = vnic_dev_cmd(vdev, CMD_PACKET_FILTER, &a0, &a1, wait);
486 if (err)
487 printk(KERN_ERR "Can't set packet filter\n");
488}
489
490void vnic_dev_add_addr(struct vnic_dev *vdev, u8 *addr)
491{
492 u64 a0 = 0, a1 = 0;
493 int wait = 1000;
494 int err;
495 int i;
496
497 for (i = 0; i < ETH_ALEN; i++)
498 ((u8 *)&a0)[i] = addr[i];
499
500 err = vnic_dev_cmd(vdev, CMD_ADDR_ADD, &a0, &a1, wait);
501 if (err)
502 printk(KERN_ERR
503 "Can't add addr [%02x:%02x:%02x:%02x:%02x:%02x], %d\n",
504 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5],
505 err);
506}
507
508void vnic_dev_del_addr(struct vnic_dev *vdev, u8 *addr)
509{
510 u64 a0 = 0, a1 = 0;
511 int wait = 1000;
512 int err;
513 int i;
514
515 for (i = 0; i < ETH_ALEN; i++)
516 ((u8 *)&a0)[i] = addr[i];
517
518 err = vnic_dev_cmd(vdev, CMD_ADDR_DEL, &a0, &a1, wait);
519 if (err)
520 printk(KERN_ERR
521 "Can't del addr [%02x:%02x:%02x:%02x:%02x:%02x], %d\n",
522 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5],
523 err);
524}
525
526int vnic_dev_notify_set(struct vnic_dev *vdev, u16 intr)
527{
528 u64 a0, a1;
529 int wait = 1000;
530
531 if (!vdev->notify) {
532 vdev->notify = pci_alloc_consistent(vdev->pdev,
533 sizeof(struct vnic_devcmd_notify),
534 &vdev->notify_pa);
535 if (!vdev->notify)
536 return -ENOMEM;
537 }
538
539 a0 = vdev->notify_pa;
540 a1 = ((u64)intr << 32) & 0x0000ffff00000000ULL;
541 a1 += sizeof(struct vnic_devcmd_notify);
542
543 return vnic_dev_cmd(vdev, CMD_NOTIFY, &a0, &a1, wait);
544}
545
546void vnic_dev_notify_unset(struct vnic_dev *vdev)
547{
548 u64 a0, a1;
549 int wait = 1000;
550
551 a0 = 0; /* paddr = 0 to unset notify buffer */
552 a1 = 0x0000ffff00000000ULL; /* intr num = -1 to unreg for intr */
553 a1 += sizeof(struct vnic_devcmd_notify);
554
555 vnic_dev_cmd(vdev, CMD_NOTIFY, &a0, &a1, wait);
556}
557
558static int vnic_dev_notify_ready(struct vnic_dev *vdev)
559{
560 u32 *words;
561 unsigned int nwords = sizeof(struct vnic_devcmd_notify) / 4;
562 unsigned int i;
563 u32 csum;
564
565 if (!vdev->notify)
566 return 0;
567
568 do {
569 csum = 0;
570 memcpy(&vdev->notify_copy, vdev->notify,
571 sizeof(struct vnic_devcmd_notify));
572 words = (u32 *)&vdev->notify_copy;
573 for (i = 1; i < nwords; i++)
574 csum += words[i];
575 } while (csum != words[0]);
576
577 return 1;
578}
579
580int vnic_dev_init(struct vnic_dev *vdev, int arg)
581{
582 u64 a0 = (u32)arg, a1 = 0;
583 int wait = 1000;
584 return vnic_dev_cmd(vdev, CMD_INIT, &a0, &a1, wait);
585}
586
Hiral Pateld3c995f2013-02-25 16:18:36 -0800587u16 vnic_dev_set_default_vlan(struct vnic_dev *vdev, u16 new_default_vlan)
588{
589 u64 a0 = new_default_vlan, a1 = 0;
590 int wait = 1000;
591 int old_vlan = 0;
592
593 old_vlan = vnic_dev_cmd(vdev, CMD_SET_DEFAULT_VLAN, &a0, &a1, wait);
594 return (u16)old_vlan;
595}
596
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700597int vnic_dev_link_status(struct vnic_dev *vdev)
598{
599 if (vdev->linkstatus)
600 return *vdev->linkstatus;
601
602 if (!vnic_dev_notify_ready(vdev))
603 return 0;
604
605 return vdev->notify_copy.link_state;
606}
607
608u32 vnic_dev_port_speed(struct vnic_dev *vdev)
609{
610 if (!vnic_dev_notify_ready(vdev))
611 return 0;
612
613 return vdev->notify_copy.port_speed;
614}
615
616u32 vnic_dev_msg_lvl(struct vnic_dev *vdev)
617{
618 if (!vnic_dev_notify_ready(vdev))
619 return 0;
620
621 return vdev->notify_copy.msglvl;
622}
623
624u32 vnic_dev_mtu(struct vnic_dev *vdev)
625{
626 if (!vnic_dev_notify_ready(vdev))
627 return 0;
628
629 return vdev->notify_copy.mtu;
630}
631
632u32 vnic_dev_link_down_cnt(struct vnic_dev *vdev)
633{
634 if (!vnic_dev_notify_ready(vdev))
635 return 0;
636
637 return vdev->notify_copy.link_down_cnt;
638}
639
640void vnic_dev_set_intr_mode(struct vnic_dev *vdev,
641 enum vnic_dev_intr_mode intr_mode)
642{
643 vdev->intr_mode = intr_mode;
644}
645
646enum vnic_dev_intr_mode vnic_dev_get_intr_mode(
647 struct vnic_dev *vdev)
648{
649 return vdev->intr_mode;
650}
651
652void vnic_dev_unregister(struct vnic_dev *vdev)
653{
654 if (vdev) {
655 if (vdev->notify)
656 pci_free_consistent(vdev->pdev,
657 sizeof(struct vnic_devcmd_notify),
658 vdev->notify,
659 vdev->notify_pa);
660 if (vdev->linkstatus)
661 pci_free_consistent(vdev->pdev,
662 sizeof(u32),
663 vdev->linkstatus,
664 vdev->linkstatus_pa);
665 if (vdev->stats)
666 pci_free_consistent(vdev->pdev,
Venkata Siva Vijayendra Bhamidipatic954f8a2011-01-28 16:03:36 -0800667 sizeof(struct vnic_stats),
Abhijeet Joglekar5df6d732009-04-17 18:33:26 -0700668 vdev->stats, vdev->stats_pa);
669 if (vdev->fw_info)
670 pci_free_consistent(vdev->pdev,
671 sizeof(struct vnic_devcmd_fw_info),
672 vdev->fw_info, vdev->fw_info_pa);
673 kfree(vdev);
674 }
675}
676
677struct vnic_dev *vnic_dev_register(struct vnic_dev *vdev,
678 void *priv, struct pci_dev *pdev, struct vnic_dev_bar *bar)
679{
680 if (!vdev) {
681 vdev = kzalloc(sizeof(struct vnic_dev), GFP_KERNEL);
682 if (!vdev)
683 return NULL;
684 }
685
686 vdev->priv = priv;
687 vdev->pdev = pdev;
688
689 if (vnic_dev_discover_res(vdev, bar))
690 goto err_out;
691
692 vdev->devcmd = vnic_dev_get_res(vdev, RES_TYPE_DEVCMD, 0);
693 if (!vdev->devcmd)
694 goto err_out;
695
696 return vdev;
697
698err_out:
699 vnic_dev_unregister(vdev);
700 return NULL;
701}