Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
[linux-btrfs-devel.git] / drivers / scsi / fnic / vnic_dev.c
blobb576be734e2e04a342cd031f75c146096bc1c2f5
1 /*
2 * Copyright 2008 Cisco Systems, Inc. All rights reserved.
3 * Copyright 2007 Nuova Systems, Inc. All rights reserved.
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.
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.
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>
25 #include <linux/slab.h>
26 #include "vnic_resource.h"
27 #include "vnic_devcmd.h"
28 #include "vnic_dev.h"
29 #include "vnic_stats.h"
31 struct vnic_res {
32 void __iomem *vaddr;
33 unsigned int count;
36 struct 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;
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
58 void *vnic_dev_priv(struct vnic_dev *vdev)
60 return vdev->priv;
63 static int vnic_dev_discover_res(struct vnic_dev *vdev,
64 struct vnic_dev_bar *bar)
66 struct vnic_resource_header __iomem *rh;
67 struct vnic_resource __iomem *r;
68 u8 type;
70 if (bar->len < VNIC_MAX_RES_HDR_SIZE) {
71 printk(KERN_ERR "vNIC BAR0 res hdr length error\n");
72 return -EINVAL;
75 rh = bar->vaddr;
76 if (!rh) {
77 printk(KERN_ERR "vNIC BAR0 res hdr not mem-mapped\n");
78 return -EINVAL;
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;
90 r = (struct vnic_resource __iomem *)(rh + 1);
92 while ((type = ioread8(&r->type)) != RES_TYPE_EOL) {
94 u8 bar_num = ioread8(&r->bar);
95 u32 bar_offset = ioread32(&r->bar_offset);
96 u32 count = ioread32(&r->count);
97 u32 len;
99 r++;
101 if (bar_num != 0) /* only mapping in BAR0 resources */
102 continue;
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;
120 break;
121 case RES_TYPE_INTR_PBA_LEGACY:
122 case RES_TYPE_DEVCMD:
123 len = count;
124 break;
125 default:
126 continue;
129 vdev->res[type].count = count;
130 vdev->res[type].vaddr = (char __iomem *)bar->vaddr + bar_offset;
133 return 0;
136 unsigned int vnic_dev_get_res_count(struct vnic_dev *vdev,
137 enum vnic_res_type type)
139 return vdev->res[type].count;
142 void __iomem *vnic_dev_get_res(struct vnic_dev *vdev, enum vnic_res_type type,
143 unsigned int index)
145 if (!vdev->res[type].vaddr)
146 return NULL;
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;
160 unsigned int vnic_dev_desc_ring_size(struct vnic_dev_ring *ring,
161 unsigned int desc_count,
162 unsigned int desc_size)
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.
170 unsigned int count_align = 32;
171 unsigned int desc_align = 16;
173 ring->base_align = 512;
175 if (desc_count == 0)
176 desc_count = 4096;
178 ring->desc_count = ALIGN(desc_count, count_align);
180 ring->desc_size = ALIGN(desc_size, desc_align);
182 ring->size = ring->desc_count * ring->desc_size;
183 ring->size_unaligned = ring->size + ring->base_align;
185 return ring->size_unaligned;
188 void vnic_dev_clear_desc_ring(struct vnic_dev_ring *ring)
190 memset(ring->descs, 0, ring->size);
193 int vnic_dev_alloc_desc_ring(struct vnic_dev *vdev, struct vnic_dev_ring *ring,
194 unsigned int desc_count, unsigned int desc_size)
196 vnic_dev_desc_ring_size(ring, desc_count, desc_size);
198 ring->descs_unaligned = pci_alloc_consistent(vdev->pdev,
199 ring->size_unaligned,
200 &ring->base_addr_unaligned);
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;
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);
214 vnic_dev_clear_desc_ring(ring);
216 ring->desc_avail = ring->desc_count - 1;
218 return 0;
221 void vnic_dev_free_desc_ring(struct vnic_dev *vdev, struct vnic_dev_ring *ring)
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;
232 int vnic_dev_cmd(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd,
233 u64 *a0, u64 *a1, int wait)
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 */
246 int err;
248 status = ioread32(&devcmd->status);
249 if (status & STAT_BUSY) {
250 printk(KERN_ERR "Busy devcmd %d\n", _CMD_N(cmd));
251 return -EBUSY;
254 if (_CMD_DIR(cmd) & _CMD_DIR_WRITE) {
255 writeq(*a0, &devcmd->args[0]);
256 writeq(*a1, &devcmd->args[1]);
257 wmb();
260 iowrite32(cmd, &devcmd->cmd);
262 if ((_CMD_FLAGS(cmd) & _CMD_FLAGS_NOWAIT))
263 return 0;
265 for (delay = 0; delay < wait; delay++) {
267 udelay(100);
269 status = ioread32(&devcmd->status);
270 if (!(status & STAT_BUSY)) {
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;
279 if (_CMD_DIR(cmd) & _CMD_DIR_READ) {
280 rmb();
281 *a0 = readq(&devcmd->args[0]);
282 *a1 = readq(&devcmd->args[1]);
285 return 0;
289 printk(KERN_ERR "Timedout devcmd %d\n", _CMD_N(cmd));
290 return -ETIMEDOUT;
293 int vnic_dev_fw_info(struct vnic_dev *vdev,
294 struct vnic_devcmd_fw_info **fw_info)
296 u64 a0, a1 = 0;
297 int wait = 1000;
298 int err = 0;
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;
307 a0 = vdev->fw_info_pa;
309 /* only get fw_info once and cache it */
310 err = vnic_dev_cmd(vdev, CMD_MCPU_FW_INFO, &a0, &a1, wait);
313 *fw_info = vdev->fw_info;
315 return err;
318 int vnic_dev_spec(struct vnic_dev *vdev, unsigned int offset, unsigned int size,
319 void *value)
321 u64 a0, a1;
322 int wait = 1000;
323 int err;
325 a0 = offset;
326 a1 = size;
328 err = vnic_dev_cmd(vdev, CMD_DEV_SPEC, &a0, &a1, wait);
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;
348 return err;
351 int vnic_dev_stats_clear(struct vnic_dev *vdev)
353 u64 a0 = 0, a1 = 0;
354 int wait = 1000;
355 return vnic_dev_cmd(vdev, CMD_STATS_CLEAR, &a0, &a1, wait);
358 int vnic_dev_stats_dump(struct vnic_dev *vdev, struct vnic_stats **stats)
360 u64 a0, a1;
361 int wait = 1000;
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;
370 *stats = vdev->stats;
371 a0 = vdev->stats_pa;
372 a1 = sizeof(struct vnic_stats);
374 return vnic_dev_cmd(vdev, CMD_STATS_DUMP, &a0, &a1, wait);
377 int vnic_dev_close(struct vnic_dev *vdev)
379 u64 a0 = 0, a1 = 0;
380 int wait = 1000;
381 return vnic_dev_cmd(vdev, CMD_CLOSE, &a0, &a1, wait);
384 int vnic_dev_enable(struct vnic_dev *vdev)
386 u64 a0 = 0, a1 = 0;
387 int wait = 1000;
388 return vnic_dev_cmd(vdev, CMD_ENABLE, &a0, &a1, wait);
391 int vnic_dev_disable(struct vnic_dev *vdev)
393 u64 a0 = 0, a1 = 0;
394 int wait = 1000;
395 return vnic_dev_cmd(vdev, CMD_DISABLE, &a0, &a1, wait);
398 int vnic_dev_open(struct vnic_dev *vdev, int arg)
400 u64 a0 = (u32)arg, a1 = 0;
401 int wait = 1000;
402 return vnic_dev_cmd(vdev, CMD_OPEN, &a0, &a1, wait);
405 int vnic_dev_open_done(struct vnic_dev *vdev, int *done)
407 u64 a0 = 0, a1 = 0;
408 int wait = 1000;
409 int err;
411 *done = 0;
413 err = vnic_dev_cmd(vdev, CMD_OPEN_STATUS, &a0, &a1, wait);
414 if (err)
415 return err;
417 *done = (a0 == 0);
419 return 0;
422 int vnic_dev_soft_reset(struct vnic_dev *vdev, int arg)
424 u64 a0 = (u32)arg, a1 = 0;
425 int wait = 1000;
426 return vnic_dev_cmd(vdev, CMD_SOFT_RESET, &a0, &a1, wait);
429 int vnic_dev_soft_reset_done(struct vnic_dev *vdev, int *done)
431 u64 a0 = 0, a1 = 0;
432 int wait = 1000;
433 int err;
435 *done = 0;
437 err = vnic_dev_cmd(vdev, CMD_SOFT_RESET_STATUS, &a0, &a1, wait);
438 if (err)
439 return err;
441 *done = (a0 == 0);
443 return 0;
446 int vnic_dev_hang_notify(struct vnic_dev *vdev)
448 u64 a0, a1;
449 int wait = 1000;
450 return vnic_dev_cmd(vdev, CMD_HANG_NOTIFY, &a0, &a1, wait);
453 int vnic_dev_mac_addr(struct vnic_dev *vdev, u8 *mac_addr)
455 u64 a0, a1;
456 int wait = 1000;
457 int err, i;
459 for (i = 0; i < ETH_ALEN; i++)
460 mac_addr[i] = 0;
462 err = vnic_dev_cmd(vdev, CMD_MAC_ADDR, &a0, &a1, wait);
463 if (err)
464 return err;
466 for (i = 0; i < ETH_ALEN; i++)
467 mac_addr[i] = ((u8 *)&a0)[i];
469 return 0;
472 void vnic_dev_packet_filter(struct vnic_dev *vdev, int directed, int multicast,
473 int broadcast, int promisc, int allmulti)
475 u64 a0, a1 = 0;
476 int wait = 1000;
477 int err;
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);
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");
490 void vnic_dev_add_addr(struct vnic_dev *vdev, u8 *addr)
492 u64 a0 = 0, a1 = 0;
493 int wait = 1000;
494 int err;
495 int i;
497 for (i = 0; i < ETH_ALEN; i++)
498 ((u8 *)&a0)[i] = addr[i];
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);
508 void vnic_dev_del_addr(struct vnic_dev *vdev, u8 *addr)
510 u64 a0 = 0, a1 = 0;
511 int wait = 1000;
512 int err;
513 int i;
515 for (i = 0; i < ETH_ALEN; i++)
516 ((u8 *)&a0)[i] = addr[i];
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);
526 int vnic_dev_notify_set(struct vnic_dev *vdev, u16 intr)
528 u64 a0, a1;
529 int wait = 1000;
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;
539 a0 = vdev->notify_pa;
540 a1 = ((u64)intr << 32) & 0x0000ffff00000000ULL;
541 a1 += sizeof(struct vnic_devcmd_notify);
543 return vnic_dev_cmd(vdev, CMD_NOTIFY, &a0, &a1, wait);
546 void vnic_dev_notify_unset(struct vnic_dev *vdev)
548 u64 a0, a1;
549 int wait = 1000;
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);
555 vnic_dev_cmd(vdev, CMD_NOTIFY, &a0, &a1, wait);
558 static int vnic_dev_notify_ready(struct vnic_dev *vdev)
560 u32 *words;
561 unsigned int nwords = sizeof(struct vnic_devcmd_notify) / 4;
562 unsigned int i;
563 u32 csum;
565 if (!vdev->notify)
566 return 0;
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]);
577 return 1;
580 int vnic_dev_init(struct vnic_dev *vdev, int arg)
582 u64 a0 = (u32)arg, a1 = 0;
583 int wait = 1000;
584 return vnic_dev_cmd(vdev, CMD_INIT, &a0, &a1, wait);
587 int vnic_dev_link_status(struct vnic_dev *vdev)
589 if (vdev->linkstatus)
590 return *vdev->linkstatus;
592 if (!vnic_dev_notify_ready(vdev))
593 return 0;
595 return vdev->notify_copy.link_state;
598 u32 vnic_dev_port_speed(struct vnic_dev *vdev)
600 if (!vnic_dev_notify_ready(vdev))
601 return 0;
603 return vdev->notify_copy.port_speed;
606 u32 vnic_dev_msg_lvl(struct vnic_dev *vdev)
608 if (!vnic_dev_notify_ready(vdev))
609 return 0;
611 return vdev->notify_copy.msglvl;
614 u32 vnic_dev_mtu(struct vnic_dev *vdev)
616 if (!vnic_dev_notify_ready(vdev))
617 return 0;
619 return vdev->notify_copy.mtu;
622 u32 vnic_dev_link_down_cnt(struct vnic_dev *vdev)
624 if (!vnic_dev_notify_ready(vdev))
625 return 0;
627 return vdev->notify_copy.link_down_cnt;
630 void vnic_dev_set_intr_mode(struct vnic_dev *vdev,
631 enum vnic_dev_intr_mode intr_mode)
633 vdev->intr_mode = intr_mode;
636 enum vnic_dev_intr_mode vnic_dev_get_intr_mode(
637 struct vnic_dev *vdev)
639 return vdev->intr_mode;
642 void vnic_dev_unregister(struct vnic_dev *vdev)
644 if (vdev) {
645 if (vdev->notify)
646 pci_free_consistent(vdev->pdev,
647 sizeof(struct vnic_devcmd_notify),
648 vdev->notify,
649 vdev->notify_pa);
650 if (vdev->linkstatus)
651 pci_free_consistent(vdev->pdev,
652 sizeof(u32),
653 vdev->linkstatus,
654 vdev->linkstatus_pa);
655 if (vdev->stats)
656 pci_free_consistent(vdev->pdev,
657 sizeof(struct vnic_stats),
658 vdev->stats, vdev->stats_pa);
659 if (vdev->fw_info)
660 pci_free_consistent(vdev->pdev,
661 sizeof(struct vnic_devcmd_fw_info),
662 vdev->fw_info, vdev->fw_info_pa);
663 kfree(vdev);
667 struct vnic_dev *vnic_dev_register(struct vnic_dev *vdev,
668 void *priv, struct pci_dev *pdev, struct vnic_dev_bar *bar)
670 if (!vdev) {
671 vdev = kzalloc(sizeof(struct vnic_dev), GFP_KERNEL);
672 if (!vdev)
673 return NULL;
676 vdev->priv = priv;
677 vdev->pdev = pdev;
679 if (vnic_dev_discover_res(vdev, bar))
680 goto err_out;
682 vdev->devcmd = vnic_dev_get_res(vdev, RES_TYPE_DEVCMD, 0);
683 if (!vdev->devcmd)
684 goto err_out;
686 return vdev;
688 err_out:
689 vnic_dev_unregister(vdev);
690 return NULL;