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"
37 #define VNIC_DEV_CAP_INIT 0x0001
38 #define VNIC_DEV_CAP_PERBI 0x0002
43 struct vnic_res res[RES_TYPE_MAX];
44 enum vnic_dev_intr_mode intr_mode;
45 struct vnic_devcmd __iomem *devcmd;
46 struct vnic_devcmd_notify *notify;
47 struct vnic_devcmd_notify notify_copy;
51 dma_addr_t linkstatus_pa;
52 struct vnic_stats *stats;
54 struct vnic_devcmd_fw_info *fw_info;
55 dma_addr_t fw_info_pa;
59 #define VNIC_MAX_RES_HDR_SIZE \
60 (sizeof(struct vnic_resource_header) + \
61 sizeof(struct vnic_resource) * RES_TYPE_MAX)
62 #define VNIC_RES_STRIDE 128
64 void *vnic_dev_priv(struct vnic_dev *vdev)
69 static int vnic_dev_discover_res(struct vnic_dev *vdev,
70 struct vnic_dev_bar *bar)
72 struct vnic_resource_header __iomem *rh;
73 struct vnic_resource __iomem *r;
76 if (bar->len < VNIC_MAX_RES_HDR_SIZE) {
77 printk(KERN_ERR "vNIC BAR0 res hdr length error\n");
83 printk(KERN_ERR "vNIC BAR0 res hdr not mem-mapped\n");
87 if (ioread32(&rh->magic) != VNIC_RES_MAGIC ||
88 ioread32(&rh->version) != VNIC_RES_VERSION) {
89 printk(KERN_ERR "vNIC BAR0 res magic/version error "
90 "exp (%lx/%lx) curr (%x/%x)\n",
91 VNIC_RES_MAGIC, VNIC_RES_VERSION,
92 ioread32(&rh->magic), ioread32(&rh->version));
96 r = (struct vnic_resource __iomem *)(rh + 1);
98 while ((type = ioread8(&r->type)) != RES_TYPE_EOL) {
100 u8 bar_num = ioread8(&r->bar);
101 u32 bar_offset = ioread32(&r->bar_offset);
102 u32 count = ioread32(&r->count);
107 if (bar_num != 0) /* only mapping in BAR0 resources */
114 case RES_TYPE_INTR_CTRL:
115 /* each count is stride bytes long */
116 len = count * VNIC_RES_STRIDE;
117 if (len + bar_offset > bar->len) {
118 printk(KERN_ERR "vNIC BAR0 resource %d "
119 "out-of-bounds, offset 0x%x + "
120 "size 0x%x > bar len 0x%lx\n",
127 case RES_TYPE_INTR_PBA_LEGACY:
128 case RES_TYPE_DEVCMD:
135 vdev->res[type].count = count;
136 vdev->res[type].vaddr = (char __iomem *)bar->vaddr + bar_offset;
142 unsigned int vnic_dev_get_res_count(struct vnic_dev *vdev,
143 enum vnic_res_type type)
145 return vdev->res[type].count;
148 void __iomem *vnic_dev_get_res(struct vnic_dev *vdev, enum vnic_res_type type,
151 if (!vdev->res[type].vaddr)
158 case RES_TYPE_INTR_CTRL:
159 return (char __iomem *)vdev->res[type].vaddr +
160 index * VNIC_RES_STRIDE;
162 return (char __iomem *)vdev->res[type].vaddr;
166 unsigned int vnic_dev_desc_ring_size(struct vnic_dev_ring *ring,
167 unsigned int desc_count, unsigned int desc_size)
169 /* The base address of the desc rings must be 512 byte aligned.
170 * Descriptor count is aligned to groups of 32 descriptors. A
171 * count of 0 means the maximum 4096 descriptors. Descriptor
172 * size is aligned to 16 bytes.
175 unsigned int count_align = 32;
176 unsigned int desc_align = 16;
178 ring->base_align = 512;
183 ring->desc_count = ALIGN(desc_count, count_align);
185 ring->desc_size = ALIGN(desc_size, desc_align);
187 ring->size = ring->desc_count * ring->desc_size;
188 ring->size_unaligned = ring->size + ring->base_align;
190 return ring->size_unaligned;
193 void vnic_dev_clear_desc_ring(struct vnic_dev_ring *ring)
195 memset(ring->descs, 0, ring->size);
198 int vnic_dev_alloc_desc_ring(struct vnic_dev *vdev, struct vnic_dev_ring *ring,
199 unsigned int desc_count, unsigned int desc_size)
201 vnic_dev_desc_ring_size(ring, desc_count, desc_size);
203 ring->descs_unaligned = pci_alloc_consistent(vdev->pdev,
204 ring->size_unaligned,
205 &ring->base_addr_unaligned);
207 if (!ring->descs_unaligned) {
209 "Failed to allocate ring (size=%d), aborting\n",
214 ring->base_addr = ALIGN(ring->base_addr_unaligned,
216 ring->descs = (u8 *)ring->descs_unaligned +
217 (ring->base_addr - ring->base_addr_unaligned);
219 vnic_dev_clear_desc_ring(ring);
221 ring->desc_avail = ring->desc_count - 1;
226 void vnic_dev_free_desc_ring(struct vnic_dev *vdev, struct vnic_dev_ring *ring)
229 pci_free_consistent(vdev->pdev,
230 ring->size_unaligned,
231 ring->descs_unaligned,
232 ring->base_addr_unaligned);
237 int vnic_dev_cmd(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd,
238 u64 *a0, u64 *a1, int wait)
240 struct vnic_devcmd __iomem *devcmd = vdev->devcmd;
245 status = ioread32(&devcmd->status);
246 if (status & STAT_BUSY) {
247 printk(KERN_ERR "Busy devcmd %d\n", _CMD_N(cmd));
251 if (_CMD_DIR(cmd) & _CMD_DIR_WRITE) {
252 writeq(*a0, &devcmd->args[0]);
253 writeq(*a1, &devcmd->args[1]);
257 iowrite32(cmd, &devcmd->cmd);
259 if ((_CMD_FLAGS(cmd) & _CMD_FLAGS_NOWAIT))
262 for (delay = 0; delay < wait; delay++) {
266 status = ioread32(&devcmd->status);
267 if (!(status & STAT_BUSY)) {
269 if (status & STAT_ERROR) {
270 err = (int)readq(&devcmd->args[0]);
271 if (err != ERR_ECMDUNKNOWN ||
272 cmd != CMD_CAPABILITY)
273 printk(KERN_ERR "Error %d devcmd %d\n",
278 if (_CMD_DIR(cmd) & _CMD_DIR_READ) {
280 *a0 = readq(&devcmd->args[0]);
281 *a1 = readq(&devcmd->args[1]);
288 printk(KERN_ERR "Timedout devcmd %d\n", _CMD_N(cmd));
292 static int vnic_dev_capable(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd)
294 u64 a0 = (u32)cmd, a1 = 0;
298 err = vnic_dev_cmd(vdev, CMD_CAPABILITY, &a0, &a1, wait);
303 int vnic_dev_fw_info(struct vnic_dev *vdev,
304 struct vnic_devcmd_fw_info **fw_info)
310 if (!vdev->fw_info) {
311 vdev->fw_info = pci_alloc_consistent(vdev->pdev,
312 sizeof(struct vnic_devcmd_fw_info),
317 a0 = vdev->fw_info_pa;
319 /* only get fw_info once and cache it */
320 err = vnic_dev_cmd(vdev, CMD_MCPU_FW_INFO, &a0, &a1, wait);
323 *fw_info = vdev->fw_info;
328 int vnic_dev_spec(struct vnic_dev *vdev, unsigned int offset, unsigned int size,
338 err = vnic_dev_cmd(vdev, CMD_DEV_SPEC, &a0, &a1, wait);
341 case 1: *(u8 *)value = (u8)a0; break;
342 case 2: *(u16 *)value = (u16)a0; break;
343 case 4: *(u32 *)value = (u32)a0; break;
344 case 8: *(u64 *)value = a0; break;
345 default: BUG(); break;
351 int vnic_dev_stats_clear(struct vnic_dev *vdev)
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)
364 vdev->stats = pci_alloc_consistent(vdev->pdev,
365 sizeof(struct vnic_stats), &vdev->stats_pa);
370 *stats = vdev->stats;
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)
381 return vnic_dev_cmd(vdev, CMD_CLOSE, &a0, &a1, wait);
384 int vnic_dev_enable(struct vnic_dev *vdev)
388 return vnic_dev_cmd(vdev, CMD_ENABLE, &a0, &a1, wait);
391 int vnic_dev_disable(struct vnic_dev *vdev)
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;
402 return vnic_dev_cmd(vdev, CMD_OPEN, &a0, &a1, wait);
405 int vnic_dev_open_done(struct vnic_dev *vdev, int *done)
413 err = vnic_dev_cmd(vdev, CMD_OPEN_STATUS, &a0, &a1, wait);
422 int vnic_dev_soft_reset(struct vnic_dev *vdev, int arg)
424 u64 a0 = (u32)arg, a1 = 0;
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)
437 err = vnic_dev_cmd(vdev, CMD_SOFT_RESET_STATUS, &a0, &a1, wait);
446 int vnic_dev_hang_notify(struct vnic_dev *vdev)
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)
459 for (i = 0; i < ETH_ALEN; i++)
462 err = vnic_dev_cmd(vdev, CMD_MAC_ADDR, &a0, &a1, wait);
466 for (i = 0; i < ETH_ALEN; i++)
467 mac_addr[i] = ((u8 *)&a0)[i];
472 void vnic_dev_packet_filter(struct vnic_dev *vdev, int directed, int multicast,
473 int broadcast, int promisc, int allmulti)
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);
487 printk(KERN_ERR "Can't set packet filter\n");
490 void vnic_dev_add_addr(struct vnic_dev *vdev, u8 *addr)
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);
502 printk(KERN_ERR "Can't add addr [%pM], %d\n", addr, err);
505 void vnic_dev_del_addr(struct vnic_dev *vdev, u8 *addr)
512 for (i = 0; i < ETH_ALEN; i++)
513 ((u8 *)&a0)[i] = addr[i];
515 err = vnic_dev_cmd(vdev, CMD_ADDR_DEL, &a0, &a1, wait);
517 printk(KERN_ERR "Can't del addr [%pM], %d\n", addr, err);
520 int vnic_dev_notify_set(struct vnic_dev *vdev, u16 intr)
527 vdev->notify = pci_alloc_consistent(vdev->pdev,
528 sizeof(struct vnic_devcmd_notify),
532 memset(vdev->notify, 0, sizeof(struct vnic_devcmd_notify));
535 a0 = vdev->notify_pa;
536 a1 = ((u64)intr << 32) & 0x0000ffff00000000ULL;
537 a1 += sizeof(struct vnic_devcmd_notify);
539 r = vnic_dev_cmd(vdev, CMD_NOTIFY, &a0, &a1, wait);
540 vdev->notify_sz = (r == 0) ? (u32)a1 : 0;
544 void vnic_dev_notify_unset(struct vnic_dev *vdev)
549 a0 = 0; /* paddr = 0 to unset notify buffer */
550 a1 = 0x0000ffff00000000ULL; /* intr num = -1 to unreg for intr */
551 a1 += sizeof(struct vnic_devcmd_notify);
553 vnic_dev_cmd(vdev, CMD_NOTIFY, &a0, &a1, wait);
557 static int vnic_dev_notify_ready(struct vnic_dev *vdev)
560 unsigned int nwords = vdev->notify_sz / 4;
564 if (!vdev->notify || !vdev->notify_sz)
569 memcpy(&vdev->notify_copy, vdev->notify, vdev->notify_sz);
570 words = (u32 *)&vdev->notify_copy;
571 for (i = 1; i < nwords; i++)
573 } while (csum != words[0]);
578 int vnic_dev_init(struct vnic_dev *vdev, int arg)
580 u64 a0 = (u32)arg, a1 = 0;
584 if (vdev->cap_flags & VNIC_DEV_CAP_INIT)
585 r = vnic_dev_cmd(vdev, CMD_INIT, &a0, &a1, wait);
587 vnic_dev_cmd(vdev, CMD_INIT_v1, &a0, &a1, wait);
588 if (a0 & CMD_INITF_DEFAULT_MAC) {
589 // Emulate these for old CMD_INIT_v1 which
590 // didn't pass a0 so no CMD_INITF_*.
591 vnic_dev_cmd(vdev, CMD_MAC_ADDR, &a0, &a1, wait);
592 vnic_dev_cmd(vdev, CMD_ADDR_ADD, &a0, &a1, wait);
598 int vnic_dev_link_status(struct vnic_dev *vdev)
600 if (vdev->linkstatus)
601 return *vdev->linkstatus;
603 if (!vnic_dev_notify_ready(vdev))
606 return vdev->notify_copy.link_state;
609 u32 vnic_dev_port_speed(struct vnic_dev *vdev)
611 if (!vnic_dev_notify_ready(vdev))
614 return vdev->notify_copy.port_speed;
617 u32 vnic_dev_msg_lvl(struct vnic_dev *vdev)
619 if (!vnic_dev_notify_ready(vdev))
622 return vdev->notify_copy.msglvl;
625 u32 vnic_dev_mtu(struct vnic_dev *vdev)
627 if (!vnic_dev_notify_ready(vdev))
630 return vdev->notify_copy.mtu;
633 u32 vnic_dev_link_down_cnt(struct vnic_dev *vdev)
635 if (!vnic_dev_notify_ready(vdev))
638 return vdev->notify_copy.link_down_cnt;
641 u32 vnic_dev_notify_status(struct vnic_dev *vdev)
643 if (!vnic_dev_notify_ready(vdev))
646 return vdev->notify_copy.status;
649 void vnic_dev_set_intr_mode(struct vnic_dev *vdev,
650 enum vnic_dev_intr_mode intr_mode)
652 vdev->intr_mode = intr_mode;
655 enum vnic_dev_intr_mode vnic_dev_get_intr_mode(
656 struct vnic_dev *vdev)
658 return vdev->intr_mode;
661 void vnic_dev_unregister(struct vnic_dev *vdev)
665 pci_free_consistent(vdev->pdev,
666 sizeof(struct vnic_devcmd_notify),
669 if (vdev->linkstatus)
670 pci_free_consistent(vdev->pdev,
673 vdev->linkstatus_pa);
675 pci_free_consistent(vdev->pdev,
676 sizeof(struct vnic_dev),
677 vdev->stats, vdev->stats_pa);
679 pci_free_consistent(vdev->pdev,
680 sizeof(struct vnic_devcmd_fw_info),
681 vdev->fw_info, vdev->fw_info_pa);
686 struct vnic_dev *vnic_dev_register(struct vnic_dev *vdev,
687 void *priv, struct pci_dev *pdev, struct vnic_dev_bar *bar)
690 vdev = kzalloc(sizeof(struct vnic_dev), GFP_ATOMIC);
698 if (vnic_dev_discover_res(vdev, bar))
701 vdev->devcmd = vnic_dev_get_res(vdev, RES_TYPE_DEVCMD, 0);
707 if (vnic_dev_capable(vdev, CMD_INIT))
708 vdev->cap_flags |= VNIC_DEV_CAP_INIT;
713 vnic_dev_unregister(vdev);