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
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>
27 #include "vnic_resource.h"
28 #include "vnic_devcmd.h"
30 #include "vnic_stats.h"
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;
48 dma_addr_t linkstatus_pa;
49 struct vnic_stats *stats;
51 struct vnic_devcmd_fw_info *fw_info;
52 dma_addr_t fw_info_pa;
55 #define VNIC_MAX_RES_HDR_SIZE \
56 (sizeof(struct vnic_resource_header) + \
57 sizeof(struct vnic_resource) * RES_TYPE_MAX)
58 #define VNIC_RES_STRIDE 128
60 void *vnic_dev_priv(struct vnic_dev *vdev)
65 static int vnic_dev_discover_res(struct vnic_dev *vdev,
66 struct vnic_dev_bar *bar)
68 struct vnic_resource_header __iomem *rh;
69 struct vnic_resource __iomem *r;
72 if (bar->len < VNIC_MAX_RES_HDR_SIZE) {
73 printk(KERN_ERR "vNIC BAR0 res hdr length error\n");
79 printk(KERN_ERR "vNIC BAR0 res hdr not mem-mapped\n");
83 if (ioread32(&rh->magic) != VNIC_RES_MAGIC ||
84 ioread32(&rh->version) != VNIC_RES_VERSION) {
85 printk(KERN_ERR "vNIC BAR0 res magic/version error "
86 "exp (%lx/%lx) curr (%x/%x)\n",
87 VNIC_RES_MAGIC, VNIC_RES_VERSION,
88 ioread32(&rh->magic), ioread32(&rh->version));
92 r = (struct vnic_resource __iomem *)(rh + 1);
94 while ((type = ioread8(&r->type)) != RES_TYPE_EOL) {
96 u8 bar_num = ioread8(&r->bar);
97 u32 bar_offset = ioread32(&r->bar_offset);
98 u32 count = ioread32(&r->count);
103 if (bar_num != 0) /* only mapping in BAR0 resources */
110 case RES_TYPE_INTR_CTRL:
111 /* each count is stride bytes long */
112 len = count * VNIC_RES_STRIDE;
113 if (len + bar_offset > bar->len) {
114 printk(KERN_ERR "vNIC BAR0 resource %d "
115 "out-of-bounds, offset 0x%x + "
116 "size 0x%x > bar len 0x%lx\n",
123 case RES_TYPE_INTR_PBA_LEGACY:
124 case RES_TYPE_DEVCMD:
131 vdev->res[type].count = count;
132 vdev->res[type].vaddr = (char __iomem *)bar->vaddr + bar_offset;
138 unsigned int vnic_dev_get_res_count(struct vnic_dev *vdev,
139 enum vnic_res_type type)
141 return vdev->res[type].count;
144 void __iomem *vnic_dev_get_res(struct vnic_dev *vdev, enum vnic_res_type type,
147 if (!vdev->res[type].vaddr)
154 case RES_TYPE_INTR_CTRL:
155 return (char __iomem *)vdev->res[type].vaddr +
156 index * VNIC_RES_STRIDE;
158 return (char __iomem *)vdev->res[type].vaddr;
162 unsigned int vnic_dev_desc_ring_size(struct vnic_dev_ring *ring,
163 unsigned int desc_count, unsigned int desc_size)
165 /* The base address of the desc rings must be 512 byte aligned.
166 * Descriptor count is aligned to groups of 32 descriptors. A
167 * count of 0 means the maximum 4096 descriptors. Descriptor
168 * size is aligned to 16 bytes.
171 unsigned int count_align = 32;
172 unsigned int desc_align = 16;
174 ring->base_align = 512;
179 ring->desc_count = ALIGN(desc_count, count_align);
181 ring->desc_size = ALIGN(desc_size, desc_align);
183 ring->size = ring->desc_count * ring->desc_size;
184 ring->size_unaligned = ring->size + ring->base_align;
186 return ring->size_unaligned;
189 void vnic_dev_clear_desc_ring(struct vnic_dev_ring *ring)
191 memset(ring->descs, 0, ring->size);
194 int vnic_dev_alloc_desc_ring(struct vnic_dev *vdev, struct vnic_dev_ring *ring,
195 unsigned int desc_count, unsigned int desc_size)
197 vnic_dev_desc_ring_size(ring, desc_count, desc_size);
199 ring->descs_unaligned = pci_alloc_consistent(vdev->pdev,
200 ring->size_unaligned,
201 &ring->base_addr_unaligned);
203 if (!ring->descs_unaligned) {
205 "Failed to allocate ring (size=%d), aborting\n",
210 ring->base_addr = ALIGN(ring->base_addr_unaligned,
212 ring->descs = (u8 *)ring->descs_unaligned +
213 (ring->base_addr - ring->base_addr_unaligned);
215 vnic_dev_clear_desc_ring(ring);
217 ring->desc_avail = ring->desc_count - 1;
222 void vnic_dev_free_desc_ring(struct vnic_dev *vdev, struct vnic_dev_ring *ring)
225 pci_free_consistent(vdev->pdev,
226 ring->size_unaligned,
227 ring->descs_unaligned,
228 ring->base_addr_unaligned);
233 int vnic_dev_cmd(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd,
234 u64 *a0, u64 *a1, int wait)
236 struct vnic_devcmd __iomem *devcmd = vdev->devcmd;
241 status = ioread32(&devcmd->status);
242 if (status & STAT_BUSY) {
243 printk(KERN_ERR "Busy devcmd %d\n", _CMD_N(cmd));
247 if (_CMD_DIR(cmd) & _CMD_DIR_WRITE) {
248 writeq(*a0, &devcmd->args[0]);
249 writeq(*a1, &devcmd->args[1]);
253 iowrite32(cmd, &devcmd->cmd);
255 if ((_CMD_FLAGS(cmd) & _CMD_FLAGS_NOWAIT))
258 for (delay = 0; delay < wait; delay++) {
262 status = ioread32(&devcmd->status);
263 if (!(status & STAT_BUSY)) {
265 if (status & STAT_ERROR) {
266 err = (int)readq(&devcmd->args[0]);
267 if (err != ERR_ECMDUNKNOWN ||
268 cmd != CMD_CAPABILITY)
269 printk(KERN_ERR "Error %d devcmd %d\n",
274 if (_CMD_DIR(cmd) & _CMD_DIR_READ) {
276 *a0 = readq(&devcmd->args[0]);
277 *a1 = readq(&devcmd->args[1]);
284 printk(KERN_ERR "Timedout devcmd %d\n", _CMD_N(cmd));
288 static int vnic_dev_capable(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd)
290 u64 a0 = (u32)cmd, a1 = 0;
294 err = vnic_dev_cmd(vdev, CMD_CAPABILITY, &a0, &a1, wait);
299 int vnic_dev_fw_info(struct vnic_dev *vdev,
300 struct vnic_devcmd_fw_info **fw_info)
306 if (!vdev->fw_info) {
307 vdev->fw_info = pci_alloc_consistent(vdev->pdev,
308 sizeof(struct vnic_devcmd_fw_info),
313 a0 = vdev->fw_info_pa;
315 /* only get fw_info once and cache it */
316 err = vnic_dev_cmd(vdev, CMD_MCPU_FW_INFO, &a0, &a1, wait);
319 *fw_info = vdev->fw_info;
324 int vnic_dev_spec(struct vnic_dev *vdev, unsigned int offset, unsigned int size,
334 err = vnic_dev_cmd(vdev, CMD_DEV_SPEC, &a0, &a1, wait);
337 case 1: *(u8 *)value = (u8)a0; break;
338 case 2: *(u16 *)value = (u16)a0; break;
339 case 4: *(u32 *)value = (u32)a0; break;
340 case 8: *(u64 *)value = a0; break;
341 default: BUG(); break;
347 int vnic_dev_stats_clear(struct vnic_dev *vdev)
351 return vnic_dev_cmd(vdev, CMD_STATS_CLEAR, &a0, &a1, wait);
354 int vnic_dev_stats_dump(struct vnic_dev *vdev, struct vnic_stats **stats)
360 vdev->stats = pci_alloc_consistent(vdev->pdev,
361 sizeof(struct vnic_stats), &vdev->stats_pa);
366 *stats = vdev->stats;
368 a1 = sizeof(struct vnic_stats);
370 return vnic_dev_cmd(vdev, CMD_STATS_DUMP, &a0, &a1, wait);
373 int vnic_dev_close(struct vnic_dev *vdev)
377 return vnic_dev_cmd(vdev, CMD_CLOSE, &a0, &a1, wait);
380 int vnic_dev_enable(struct vnic_dev *vdev)
384 return vnic_dev_cmd(vdev, CMD_ENABLE, &a0, &a1, wait);
387 int vnic_dev_disable(struct vnic_dev *vdev)
391 return vnic_dev_cmd(vdev, CMD_DISABLE, &a0, &a1, wait);
394 int vnic_dev_open(struct vnic_dev *vdev, int arg)
396 u64 a0 = (u32)arg, a1 = 0;
398 return vnic_dev_cmd(vdev, CMD_OPEN, &a0, &a1, wait);
401 int vnic_dev_open_done(struct vnic_dev *vdev, int *done)
409 err = vnic_dev_cmd(vdev, CMD_OPEN_STATUS, &a0, &a1, wait);
418 int vnic_dev_soft_reset(struct vnic_dev *vdev, int arg)
420 u64 a0 = (u32)arg, a1 = 0;
422 return vnic_dev_cmd(vdev, CMD_SOFT_RESET, &a0, &a1, wait);
425 int vnic_dev_soft_reset_done(struct vnic_dev *vdev, int *done)
433 err = vnic_dev_cmd(vdev, CMD_SOFT_RESET_STATUS, &a0, &a1, wait);
442 int vnic_dev_hang_notify(struct vnic_dev *vdev)
446 return vnic_dev_cmd(vdev, CMD_HANG_NOTIFY, &a0, &a1, wait);
449 int vnic_dev_mac_addr(struct vnic_dev *vdev, u8 *mac_addr)
455 for (i = 0; i < ETH_ALEN; i++)
458 err = vnic_dev_cmd(vdev, CMD_MAC_ADDR, &a0, &a1, wait);
462 for (i = 0; i < ETH_ALEN; i++)
463 mac_addr[i] = ((u8 *)&a0)[i];
468 void vnic_dev_packet_filter(struct vnic_dev *vdev, int directed, int multicast,
469 int broadcast, int promisc, int allmulti)
475 a0 = (directed ? CMD_PFILTER_DIRECTED : 0) |
476 (multicast ? CMD_PFILTER_MULTICAST : 0) |
477 (broadcast ? CMD_PFILTER_BROADCAST : 0) |
478 (promisc ? CMD_PFILTER_PROMISCUOUS : 0) |
479 (allmulti ? CMD_PFILTER_ALL_MULTICAST : 0);
481 err = vnic_dev_cmd(vdev, CMD_PACKET_FILTER, &a0, &a1, wait);
483 printk(KERN_ERR "Can't set packet filter\n");
486 void vnic_dev_add_addr(struct vnic_dev *vdev, u8 *addr)
493 for (i = 0; i < ETH_ALEN; i++)
494 ((u8 *)&a0)[i] = addr[i];
496 err = vnic_dev_cmd(vdev, CMD_ADDR_ADD, &a0, &a1, wait);
498 printk(KERN_ERR "Can't add addr [%pM], %d\n", addr, err);
501 void vnic_dev_del_addr(struct vnic_dev *vdev, u8 *addr)
508 for (i = 0; i < ETH_ALEN; i++)
509 ((u8 *)&a0)[i] = addr[i];
511 err = vnic_dev_cmd(vdev, CMD_ADDR_DEL, &a0, &a1, wait);
513 printk(KERN_ERR "Can't del addr [%pM], %d\n", addr, err);
516 int vnic_dev_notify_set(struct vnic_dev *vdev, u16 intr)
523 vdev->notify = pci_alloc_consistent(vdev->pdev,
524 sizeof(struct vnic_devcmd_notify),
528 memset(vdev->notify, 0, sizeof(struct vnic_devcmd_notify));
531 a0 = vdev->notify_pa;
532 a1 = ((u64)intr << 32) & 0x0000ffff00000000ULL;
533 a1 += sizeof(struct vnic_devcmd_notify);
535 r = vnic_dev_cmd(vdev, CMD_NOTIFY, &a0, &a1, wait);
536 vdev->notify_sz = (r == 0) ? (u32)a1 : 0;
540 void vnic_dev_notify_unset(struct vnic_dev *vdev)
545 a0 = 0; /* paddr = 0 to unset notify buffer */
546 a1 = 0x0000ffff00000000ULL; /* intr num = -1 to unreg for intr */
547 a1 += sizeof(struct vnic_devcmd_notify);
549 vnic_dev_cmd(vdev, CMD_NOTIFY, &a0, &a1, wait);
553 static int vnic_dev_notify_ready(struct vnic_dev *vdev)
556 unsigned int nwords = vdev->notify_sz / 4;
560 if (!vdev->notify || !vdev->notify_sz)
565 memcpy(&vdev->notify_copy, vdev->notify, vdev->notify_sz);
566 words = (u32 *)&vdev->notify_copy;
567 for (i = 1; i < nwords; i++)
569 } while (csum != words[0]);
574 int vnic_dev_init(struct vnic_dev *vdev, int arg)
576 u64 a0 = (u32)arg, a1 = 0;
580 if (vnic_dev_capable(vdev, CMD_INIT))
581 r = vnic_dev_cmd(vdev, CMD_INIT, &a0, &a1, wait);
583 vnic_dev_cmd(vdev, CMD_INIT_v1, &a0, &a1, wait);
584 if (a0 & CMD_INITF_DEFAULT_MAC) {
585 // Emulate these for old CMD_INIT_v1 which
586 // didn't pass a0 so no CMD_INITF_*.
587 vnic_dev_cmd(vdev, CMD_MAC_ADDR, &a0, &a1, wait);
588 vnic_dev_cmd(vdev, CMD_ADDR_ADD, &a0, &a1, wait);
594 int vnic_dev_link_status(struct vnic_dev *vdev)
596 if (vdev->linkstatus)
597 return *vdev->linkstatus;
599 if (!vnic_dev_notify_ready(vdev))
602 return vdev->notify_copy.link_state;
605 u32 vnic_dev_port_speed(struct vnic_dev *vdev)
607 if (!vnic_dev_notify_ready(vdev))
610 return vdev->notify_copy.port_speed;
613 u32 vnic_dev_msg_lvl(struct vnic_dev *vdev)
615 if (!vnic_dev_notify_ready(vdev))
618 return vdev->notify_copy.msglvl;
621 u32 vnic_dev_mtu(struct vnic_dev *vdev)
623 if (!vnic_dev_notify_ready(vdev))
626 return vdev->notify_copy.mtu;
629 void vnic_dev_set_intr_mode(struct vnic_dev *vdev,
630 enum vnic_dev_intr_mode intr_mode)
632 vdev->intr_mode = intr_mode;
635 enum vnic_dev_intr_mode vnic_dev_get_intr_mode(
636 struct vnic_dev *vdev)
638 return vdev->intr_mode;
641 void vnic_dev_unregister(struct vnic_dev *vdev)
645 pci_free_consistent(vdev->pdev,
646 sizeof(struct vnic_devcmd_notify),
649 if (vdev->linkstatus)
650 pci_free_consistent(vdev->pdev,
653 vdev->linkstatus_pa);
655 pci_free_consistent(vdev->pdev,
656 sizeof(struct vnic_dev),
657 vdev->stats, vdev->stats_pa);
659 pci_free_consistent(vdev->pdev,
660 sizeof(struct vnic_devcmd_fw_info),
661 vdev->fw_info, vdev->fw_info_pa);
666 struct vnic_dev *vnic_dev_register(struct vnic_dev *vdev,
667 void *priv, struct pci_dev *pdev, struct vnic_dev_bar *bar)
670 vdev = kzalloc(sizeof(struct vnic_dev), GFP_ATOMIC);
678 if (vnic_dev_discover_res(vdev, bar))
681 vdev->devcmd = vnic_dev_get_res(vdev, RES_TYPE_DEVCMD, 0);
688 vnic_dev_unregister(vdev);