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-rw-r--r--drivers/net/enic/vnic_dev.c674
1 files changed, 674 insertions, 0 deletions
diff --git a/drivers/net/enic/vnic_dev.c b/drivers/net/enic/vnic_dev.c
new file mode 100644
index 000000000000..4d104f5c30f9
--- /dev/null
+++ b/drivers/net/enic/vnic_dev.c
@@ -0,0 +1,674 @@
1/*
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
20#include <linux/kernel.h>
21#include <linux/errno.h>
22#include <linux/types.h>
23#include <linux/pci.h>
24#include <linux/delay.h>
25#include <linux/if_ether.h>
26
27#include "vnic_resource.h"
28#include "vnic_devcmd.h"
29#include "vnic_dev.h"
30#include "vnic_stats.h"
31
32struct vnic_res {
33 void __iomem *vaddr;
34 unsigned int count;
35};
36
37struct vnic_dev {
38 void *priv;
39 struct pci_dev *pdev;
40 struct vnic_res res[RES_TYPE_MAX];
41 enum vnic_dev_intr_mode intr_mode;
42 struct vnic_devcmd __iomem *devcmd;
43 struct vnic_devcmd_notify *notify;
44 struct vnic_devcmd_notify notify_copy;
45 dma_addr_t notify_pa;
46 u32 *linkstatus;
47 dma_addr_t linkstatus_pa;
48 struct vnic_stats *stats;
49 dma_addr_t stats_pa;
50 struct vnic_devcmd_fw_info *fw_info;
51 dma_addr_t fw_info_pa;
52};
53
54#define VNIC_MAX_RES_HDR_SIZE \
55 (sizeof(struct vnic_resource_header) + \
56 sizeof(struct vnic_resource) * RES_TYPE_MAX)
57#define VNIC_RES_STRIDE 128
58
59void *vnic_dev_priv(struct vnic_dev *vdev)
60{
61 return vdev->priv;
62}
63
64static int vnic_dev_discover_res(struct vnic_dev *vdev,
65 struct vnic_dev_bar *bar)
66{
67 struct vnic_resource_header __iomem *rh;
68 struct vnic_resource __iomem *r;
69 u8 type;
70
71 if (bar->len < VNIC_MAX_RES_HDR_SIZE) {
72 printk(KERN_ERR "vNIC BAR0 res hdr length error\n");
73 return -EINVAL;
74 }
75
76 rh = bar->vaddr;
77 if (!rh) {
78 printk(KERN_ERR "vNIC BAR0 res hdr not mem-mapped\n");
79 return -EINVAL;
80 }
81
82 if (ioread32(&rh->magic) != VNIC_RES_MAGIC ||
83 ioread32(&rh->version) != VNIC_RES_VERSION) {
84 printk(KERN_ERR "vNIC BAR0 res magic/version error "
85 "exp (%lx/%lx) curr (%x/%x)\n",
86 VNIC_RES_MAGIC, VNIC_RES_VERSION,
87 ioread32(&rh->magic), ioread32(&rh->version));
88 return -EINVAL;
89 }
90
91 r = (struct vnic_resource __iomem *)(rh + 1);
92
93 while ((type = ioread8(&r->type)) != RES_TYPE_EOL) {
94
95 u8 bar_num = ioread8(&r->bar);
96 u32 bar_offset = ioread32(&r->bar_offset);
97 u32 count = ioread32(&r->count);
98 u32 len;
99
100 r++;
101
102 if (bar_num != 0) /* only mapping in BAR0 resources */
103 continue;
104
105 switch (type) {
106 case RES_TYPE_WQ:
107 case RES_TYPE_RQ:
108 case RES_TYPE_CQ:
109 case RES_TYPE_INTR_CTRL:
110 /* each count is stride bytes long */
111 len = count * VNIC_RES_STRIDE;
112 if (len + bar_offset > bar->len) {
113 printk(KERN_ERR "vNIC BAR0 resource %d "
114 "out-of-bounds, offset 0x%x + "
115 "size 0x%x > bar len 0x%lx\n",
116 type, bar_offset,
117 len,
118 bar->len);
119 return -EINVAL;
120 }
121 break;
122 case RES_TYPE_INTR_PBA_LEGACY:
123 case RES_TYPE_DEVCMD:
124 len = count;
125 break;
126 default:
127 continue;
128 }
129
130 vdev->res[type].count = count;
131 vdev->res[type].vaddr = (char __iomem *)bar->vaddr + bar_offset;
132 }
133
134 return 0;
135}
136
137unsigned int vnic_dev_get_res_count(struct vnic_dev *vdev,
138 enum vnic_res_type type)
139{
140 return vdev->res[type].count;
141}
142
143void __iomem *vnic_dev_get_res(struct vnic_dev *vdev, enum vnic_res_type type,
144 unsigned int index)
145{
146 if (!vdev->res[type].vaddr)
147 return NULL;
148
149 switch (type) {
150 case RES_TYPE_WQ:
151 case RES_TYPE_RQ:
152 case RES_TYPE_CQ:
153 case RES_TYPE_INTR_CTRL:
154 return (char __iomem *)vdev->res[type].vaddr +
155 index * VNIC_RES_STRIDE;
156 default:
157 return (char __iomem *)vdev->res[type].vaddr;
158 }
159}
160
161unsigned int vnic_dev_desc_ring_size(struct vnic_dev_ring *ring,
162 unsigned int desc_count, 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: *(u8 *)value = (u8)a0; break;
332 case 2: *(u16 *)value = (u16)a0; break;
333 case 4: *(u32 *)value = (u32)a0; break;
334 case 8: *(u64 *)value = a0; break;
335 default: BUG(); break;
336 }
337
338 return err;
339}
340
341int vnic_dev_stats_clear(struct vnic_dev *vdev)
342{
343 u64 a0 = 0, a1 = 0;
344 int wait = 1000;
345 return vnic_dev_cmd(vdev, CMD_STATS_CLEAR, &a0, &a1, wait);
346}
347
348int vnic_dev_stats_dump(struct vnic_dev *vdev, struct vnic_stats **stats)
349{
350 u64 a0, a1;
351 int wait = 1000;
352
353 if (!vdev->stats) {
354 vdev->stats = pci_alloc_consistent(vdev->pdev,
355 sizeof(struct vnic_stats), &vdev->stats_pa);
356 if (!vdev->stats)
357 return -ENOMEM;
358 }
359
360 *stats = vdev->stats;
361 a0 = vdev->stats_pa;
362 a1 = sizeof(struct vnic_stats);
363
364 return vnic_dev_cmd(vdev, CMD_STATS_DUMP, &a0, &a1, wait);
365}
366
367int vnic_dev_close(struct vnic_dev *vdev)
368{
369 u64 a0 = 0, a1 = 0;
370 int wait = 1000;
371 return vnic_dev_cmd(vdev, CMD_CLOSE, &a0, &a1, wait);
372}
373
374int vnic_dev_enable(struct vnic_dev *vdev)
375{
376 u64 a0 = 0, a1 = 0;
377 int wait = 1000;
378 return vnic_dev_cmd(vdev, CMD_ENABLE, &a0, &a1, wait);
379}
380
381int vnic_dev_disable(struct vnic_dev *vdev)
382{
383 u64 a0 = 0, a1 = 0;
384 int wait = 1000;
385 return vnic_dev_cmd(vdev, CMD_DISABLE, &a0, &a1, wait);
386}
387
388int vnic_dev_open(struct vnic_dev *vdev, int arg)
389{
390 u64 a0 = (u32)arg, a1 = 0;
391 int wait = 1000;
392 return vnic_dev_cmd(vdev, CMD_OPEN, &a0, &a1, wait);
393}
394
395int vnic_dev_open_done(struct vnic_dev *vdev, int *done)
396{
397 u64 a0 = 0, a1 = 0;
398 int wait = 1000;
399 int err;
400
401 *done = 0;
402
403 err = vnic_dev_cmd(vdev, CMD_OPEN_STATUS, &a0, &a1, wait);
404 if (err)
405 return err;
406
407 *done = (a0 == 0);
408
409 return 0;
410}
411
412int vnic_dev_soft_reset(struct vnic_dev *vdev, int arg)
413{
414 u64 a0 = (u32)arg, a1 = 0;
415 int wait = 1000;
416 return vnic_dev_cmd(vdev, CMD_SOFT_RESET, &a0, &a1, wait);
417}
418
419int vnic_dev_soft_reset_done(struct vnic_dev *vdev, int *done)
420{
421 u64 a0 = 0, a1 = 0;
422 int wait = 1000;
423 int err;
424
425 *done = 0;
426
427 err = vnic_dev_cmd(vdev, CMD_SOFT_RESET_STATUS, &a0, &a1, wait);
428 if (err)
429 return err;
430
431 *done = (a0 == 0);
432
433 return 0;
434}
435
436int vnic_dev_hang_notify(struct vnic_dev *vdev)
437{
438 u64 a0, a1;
439 int wait = 1000;
440 return vnic_dev_cmd(vdev, CMD_HANG_NOTIFY, &a0, &a1, wait);
441}
442
443int vnic_dev_mac_addr(struct vnic_dev *vdev, u8 *mac_addr)
444{
445 u64 a0, a1;
446 int wait = 1000;
447 int err, i;
448
449 for (i = 0; i < ETH_ALEN; i++)
450 mac_addr[i] = 0;
451
452 err = vnic_dev_cmd(vdev, CMD_MAC_ADDR, &a0, &a1, wait);
453 if (err)
454 return err;
455
456 for (i = 0; i < ETH_ALEN; i++)
457 mac_addr[i] = ((u8 *)&a0)[i];
458
459 return 0;
460}
461
462void vnic_dev_packet_filter(struct vnic_dev *vdev, int directed, int multicast,
463 int broadcast, int promisc, int allmulti)
464{
465 u64 a0, a1 = 0;
466 int wait = 1000;
467 int err;
468
469 a0 = (directed ? CMD_PFILTER_DIRECTED : 0) |
470 (multicast ? CMD_PFILTER_MULTICAST : 0) |
471 (broadcast ? CMD_PFILTER_BROADCAST : 0) |
472 (promisc ? CMD_PFILTER_PROMISCUOUS : 0) |
473 (allmulti ? CMD_PFILTER_ALL_MULTICAST : 0);
474
475 err = vnic_dev_cmd(vdev, CMD_PACKET_FILTER, &a0, &a1, wait);
476 if (err)
477 printk(KERN_ERR "Can't set packet filter\n");
478}
479
480void vnic_dev_add_addr(struct vnic_dev *vdev, u8 *addr)
481{
482 u64 a0 = 0, a1 = 0;
483 int wait = 1000;
484 int err;
485 int i;
486
487 for (i = 0; i < ETH_ALEN; i++)
488 ((u8 *)&a0)[i] = addr[i];
489
490 err = vnic_dev_cmd(vdev, CMD_ADDR_ADD, &a0, &a1, wait);
491 if (err)
492 printk(KERN_ERR
493 "Can't add addr [%02x:%02x:%02x:%02x:%02x:%02x], %d\n",
494 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5],
495 err);
496}
497
498void vnic_dev_del_addr(struct vnic_dev *vdev, u8 *addr)
499{
500 u64 a0 = 0, a1 = 0;
501 int wait = 1000;
502 int err;
503 int i;
504
505 for (i = 0; i < ETH_ALEN; i++)
506 ((u8 *)&a0)[i] = addr[i];
507
508 err = vnic_dev_cmd(vdev, CMD_ADDR_DEL, &a0, &a1, wait);
509 if (err)
510 printk(KERN_ERR
511 "Can't del addr [%02x:%02x:%02x:%02x:%02x:%02x], %d\n",
512 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5],
513 err);
514}
515
516int vnic_dev_notify_set(struct vnic_dev *vdev, u16 intr)
517{
518 u64 a0, a1;
519 int wait = 1000;
520
521 if (!vdev->notify) {
522 vdev->notify = pci_alloc_consistent(vdev->pdev,
523 sizeof(struct vnic_devcmd_notify),
524 &vdev->notify_pa);
525 if (!vdev->notify)
526 return -ENOMEM;
527 }
528
529 a0 = vdev->notify_pa;
530 a1 = ((u64)intr << 32) & 0x0000ffff00000000ULL;
531 a1 += sizeof(struct vnic_devcmd_notify);
532
533 return vnic_dev_cmd(vdev, CMD_NOTIFY, &a0, &a1, wait);
534}
535
536void vnic_dev_notify_unset(struct vnic_dev *vdev)
537{
538 u64 a0, a1;
539 int wait = 1000;
540
541 a0 = 0; /* paddr = 0 to unset notify buffer */
542 a1 = 0x0000ffff00000000ULL; /* intr num = -1 to unreg for intr */
543 a1 += sizeof(struct vnic_devcmd_notify);
544
545 vnic_dev_cmd(vdev, CMD_NOTIFY, &a0, &a1, wait);
546}
547
548static int vnic_dev_notify_ready(struct vnic_dev *vdev)
549{
550 u32 *words;
551 unsigned int nwords = sizeof(struct vnic_devcmd_notify) / 4;
552 unsigned int i;
553 u32 csum;
554
555 if (!vdev->notify)
556 return 0;
557
558 do {
559 csum = 0;
560 memcpy(&vdev->notify_copy, vdev->notify,
561 sizeof(struct vnic_devcmd_notify));
562 words = (u32 *)&vdev->notify_copy;
563 for (i = 1; i < nwords; i++)
564 csum += words[i];
565 } while (csum != words[0]);
566
567 return 1;
568}
569
570int vnic_dev_init(struct vnic_dev *vdev, int arg)
571{
572 u64 a0 = (u32)arg, a1 = 0;
573 int wait = 1000;
574 return vnic_dev_cmd(vdev, CMD_INIT, &a0, &a1, wait);
575}
576
577int vnic_dev_link_status(struct vnic_dev *vdev)
578{
579 if (vdev->linkstatus)
580 return *vdev->linkstatus;
581
582 if (!vnic_dev_notify_ready(vdev))
583 return 0;
584
585 return vdev->notify_copy.link_state;
586}
587
588u32 vnic_dev_port_speed(struct vnic_dev *vdev)
589{
590 if (!vnic_dev_notify_ready(vdev))
591 return 0;
592
593 return vdev->notify_copy.port_speed;
594}
595
596u32 vnic_dev_msg_lvl(struct vnic_dev *vdev)
597{
598 if (!vnic_dev_notify_ready(vdev))
599 return 0;
600
601 return vdev->notify_copy.msglvl;
602}
603
604u32 vnic_dev_mtu(struct vnic_dev *vdev)
605{
606 if (!vnic_dev_notify_ready(vdev))
607 return 0;
608
609 return vdev->notify_copy.mtu;
610}
611
612void vnic_dev_set_intr_mode(struct vnic_dev *vdev,
613 enum vnic_dev_intr_mode intr_mode)
614{
615 vdev->intr_mode = intr_mode;
616}
617
618enum vnic_dev_intr_mode vnic_dev_get_intr_mode(
619 struct vnic_dev *vdev)
620{
621 return vdev->intr_mode;
622}
623
624void vnic_dev_unregister(struct vnic_dev *vdev)
625{
626 if (vdev) {
627 if (vdev->notify)
628 pci_free_consistent(vdev->pdev,
629 sizeof(struct vnic_devcmd_notify),
630 vdev->notify,
631 vdev->notify_pa);
632 if (vdev->linkstatus)
633 pci_free_consistent(vdev->pdev,
634 sizeof(u32),
635 vdev->linkstatus,
636 vdev->linkstatus_pa);
637 if (vdev->stats)
638 pci_free_consistent(vdev->pdev,
639 sizeof(struct vnic_dev),
640 vdev->stats, vdev->stats_pa);
641 if (vdev->fw_info)
642 pci_free_consistent(vdev->pdev,
643 sizeof(struct vnic_devcmd_fw_info),
644 vdev->fw_info, vdev->fw_info_pa);
645 kfree(vdev);
646 }
647}
648
649struct vnic_dev *vnic_dev_register(struct vnic_dev *vdev,
650 void *priv, struct pci_dev *pdev, struct vnic_dev_bar *bar)
651{
652 if (!vdev) {
653 vdev = kzalloc(sizeof(struct vnic_dev), GFP_ATOMIC);
654 if (!vdev)
655 return NULL;
656 }
657
658 vdev->priv = priv;
659 vdev->pdev = pdev;
660
661 if (vnic_dev_discover_res(vdev, bar))
662 goto err_out;
663
664 vdev->devcmd = vnic_dev_get_res(vdev, RES_TYPE_DEVCMD, 0);
665 if (!vdev->devcmd)
666 goto err_out;
667
668 return vdev;
669
670err_out:
671 vnic_dev_unregister(vdev);
672 return NULL;
673}
674
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