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;
47 dma_addr_t linkstatus_pa;
48 struct vnic_stats *stats;
50 struct vnic_devcmd_fw_info *fw_info;
51 dma_addr_t fw_info_pa;
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
59 void *vnic_dev_priv(struct vnic_dev *vdev)
64 static int vnic_dev_discover_res(struct vnic_dev *vdev,
65 struct vnic_dev_bar *bar)
67 struct vnic_resource_header __iomem *rh;
68 struct vnic_resource __iomem *r;
71 if (bar->len < VNIC_MAX_RES_HDR_SIZE) {
72 printk(KERN_ERR "vNIC BAR0 res hdr length error\n");
78 printk(KERN_ERR "vNIC BAR0 res hdr not mem-mapped\n");
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));
91 r = (struct vnic_resource __iomem *)(rh + 1);
93 while ((type = ioread8(&r->type)) != RES_TYPE_EOL) {
95 u8 bar_num = ioread8(&r->bar);
96 u32 bar_offset = ioread32(&r->bar_offset);
97 u32 count = ioread32(&r->count);
102 if (bar_num != 0) /* only mapping in BAR0 resources */
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",
122 case RES_TYPE_INTR_PBA_LEGACY:
123 case RES_TYPE_DEVCMD:
130 vdev->res[type].count = count;
131 vdev->res[type].vaddr = (char __iomem *)bar->vaddr + bar_offset;
137 unsigned int vnic_dev_get_res_count(struct vnic_dev *vdev,
138 enum vnic_res_type type)
140 return vdev->res[type].count;
143 void __iomem *vnic_dev_get_res(struct vnic_dev *vdev, enum vnic_res_type type,
146 if (!vdev->res[type].vaddr)
153 case RES_TYPE_INTR_CTRL:
154 return (char __iomem *)vdev->res[type].vaddr +
155 index * VNIC_RES_STRIDE;
157 return (char __iomem *)vdev->res[type].vaddr;
161 unsigned int vnic_dev_desc_ring_size(struct vnic_dev_ring *ring,
162 unsigned int desc_count, 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;
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) {
204 "Failed to allocate ring (size=%d), aborting\n",
209 ring->base_addr = ALIGN(ring->base_addr_unaligned,
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;
221 void vnic_dev_free_desc_ring(struct vnic_dev *vdev, struct vnic_dev_ring *ring)
224 pci_free_consistent(vdev->pdev,
225 ring->size_unaligned,
226 ring->descs_unaligned,
227 ring->base_addr_unaligned);
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;
238 int dev_cmd_err[] = {
239 /* convert from fw's version of error.h to host's version */
241 EINVAL, /* ERR_EINVAL */
242 EFAULT, /* ERR_EFAULT */
243 EPERM, /* ERR_EPERM */
244 EBUSY, /* ERR_EBUSY */
248 status = ioread32(&devcmd->status);
249 if (status & STAT_BUSY) {
250 printk(KERN_ERR "Busy devcmd %d\n", _CMD_N(cmd));
254 if (_CMD_DIR(cmd) & _CMD_DIR_WRITE) {
255 writeq(*a0, &devcmd->args[0]);
256 writeq(*a1, &devcmd->args[1]);
260 iowrite32(cmd, &devcmd->cmd);
262 if ((_CMD_FLAGS(cmd) & _CMD_FLAGS_NOWAIT))
265 for (delay = 0; delay < wait; delay++) {
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",
279 if (_CMD_DIR(cmd) & _CMD_DIR_READ) {
281 *a0 = readq(&devcmd->args[0]);
282 *a1 = readq(&devcmd->args[1]);
289 printk(KERN_ERR "Timedout devcmd %d\n", _CMD_N(cmd));
293 int vnic_dev_fw_info(struct vnic_dev *vdev,
294 struct vnic_devcmd_fw_info **fw_info)
300 if (!vdev->fw_info) {
301 vdev->fw_info = pci_alloc_consistent(vdev->pdev,
302 sizeof(struct vnic_devcmd_fw_info),
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;
318 int vnic_dev_spec(struct vnic_dev *vdev, unsigned int offset, unsigned int size,
328 err = vnic_dev_cmd(vdev, CMD_DEV_SPEC, &a0, &a1, wait);
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;
341 int vnic_dev_stats_clear(struct vnic_dev *vdev)
345 return vnic_dev_cmd(vdev, CMD_STATS_CLEAR, &a0, &a1, wait);
348 int vnic_dev_stats_dump(struct vnic_dev *vdev, struct vnic_stats **stats)
354 vdev->stats = pci_alloc_consistent(vdev->pdev,
355 sizeof(struct vnic_stats), &vdev->stats_pa);
360 *stats = vdev->stats;
362 a1 = sizeof(struct vnic_stats);
364 return vnic_dev_cmd(vdev, CMD_STATS_DUMP, &a0, &a1, wait);
367 int vnic_dev_close(struct vnic_dev *vdev)
371 return vnic_dev_cmd(vdev, CMD_CLOSE, &a0, &a1, wait);
374 int vnic_dev_enable(struct vnic_dev *vdev)
378 return vnic_dev_cmd(vdev, CMD_ENABLE, &a0, &a1, wait);
381 int vnic_dev_disable(struct vnic_dev *vdev)
385 return vnic_dev_cmd(vdev, CMD_DISABLE, &a0, &a1, wait);
388 int vnic_dev_open(struct vnic_dev *vdev, int arg)
390 u64 a0 = (u32)arg, a1 = 0;
392 return vnic_dev_cmd(vdev, CMD_OPEN, &a0, &a1, wait);
395 int vnic_dev_open_done(struct vnic_dev *vdev, int *done)
403 err = vnic_dev_cmd(vdev, CMD_OPEN_STATUS, &a0, &a1, wait);
412 int vnic_dev_soft_reset(struct vnic_dev *vdev, int arg)
414 u64 a0 = (u32)arg, a1 = 0;
416 return vnic_dev_cmd(vdev, CMD_SOFT_RESET, &a0, &a1, wait);
419 int vnic_dev_soft_reset_done(struct vnic_dev *vdev, int *done)
427 err = vnic_dev_cmd(vdev, CMD_SOFT_RESET_STATUS, &a0, &a1, wait);
436 int vnic_dev_hang_notify(struct vnic_dev *vdev)
440 return vnic_dev_cmd(vdev, CMD_HANG_NOTIFY, &a0, &a1, wait);
443 int vnic_dev_mac_addr(struct vnic_dev *vdev, u8 *mac_addr)
449 for (i = 0; i < ETH_ALEN; i++)
452 err = vnic_dev_cmd(vdev, CMD_MAC_ADDR, &a0, &a1, wait);
456 for (i = 0; i < ETH_ALEN; i++)
457 mac_addr[i] = ((u8 *)&a0)[i];
462 void vnic_dev_packet_filter(struct vnic_dev *vdev, int directed, int multicast,
463 int broadcast, int promisc, int allmulti)
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);
475 err = vnic_dev_cmd(vdev, CMD_PACKET_FILTER, &a0, &a1, wait);
477 printk(KERN_ERR "Can't set packet filter\n");
480 void vnic_dev_add_addr(struct vnic_dev *vdev, u8 *addr)
487 for (i = 0; i < ETH_ALEN; i++)
488 ((u8 *)&a0)[i] = addr[i];
490 err = vnic_dev_cmd(vdev, CMD_ADDR_ADD, &a0, &a1, wait);
492 printk(KERN_ERR "Can't add addr [%pM], %d\n", addr, err);
495 void vnic_dev_del_addr(struct vnic_dev *vdev, u8 *addr)
502 for (i = 0; i < ETH_ALEN; i++)
503 ((u8 *)&a0)[i] = addr[i];
505 err = vnic_dev_cmd(vdev, CMD_ADDR_DEL, &a0, &a1, wait);
507 printk(KERN_ERR "Can't del addr [%pM], %d\n", addr, err);
510 int vnic_dev_notify_set(struct vnic_dev *vdev, u16 intr)
516 vdev->notify = pci_alloc_consistent(vdev->pdev,
517 sizeof(struct vnic_devcmd_notify),
523 a0 = vdev->notify_pa;
524 a1 = ((u64)intr << 32) & 0x0000ffff00000000ULL;
525 a1 += sizeof(struct vnic_devcmd_notify);
527 return vnic_dev_cmd(vdev, CMD_NOTIFY, &a0, &a1, wait);
530 void vnic_dev_notify_unset(struct vnic_dev *vdev)
535 a0 = 0; /* paddr = 0 to unset notify buffer */
536 a1 = 0x0000ffff00000000ULL; /* intr num = -1 to unreg for intr */
537 a1 += sizeof(struct vnic_devcmd_notify);
539 vnic_dev_cmd(vdev, CMD_NOTIFY, &a0, &a1, wait);
542 static int vnic_dev_notify_ready(struct vnic_dev *vdev)
545 unsigned int nwords = sizeof(struct vnic_devcmd_notify) / 4;
554 memcpy(&vdev->notify_copy, vdev->notify,
555 sizeof(struct vnic_devcmd_notify));
556 words = (u32 *)&vdev->notify_copy;
557 for (i = 1; i < nwords; i++)
559 } while (csum != words[0]);
564 int vnic_dev_init(struct vnic_dev *vdev, int arg)
566 u64 a0 = (u32)arg, a1 = 0;
568 return vnic_dev_cmd(vdev, CMD_INIT, &a0, &a1, wait);
571 int vnic_dev_link_status(struct vnic_dev *vdev)
573 if (vdev->linkstatus)
574 return *vdev->linkstatus;
576 if (!vnic_dev_notify_ready(vdev))
579 return vdev->notify_copy.link_state;
582 u32 vnic_dev_port_speed(struct vnic_dev *vdev)
584 if (!vnic_dev_notify_ready(vdev))
587 return vdev->notify_copy.port_speed;
590 u32 vnic_dev_msg_lvl(struct vnic_dev *vdev)
592 if (!vnic_dev_notify_ready(vdev))
595 return vdev->notify_copy.msglvl;
598 u32 vnic_dev_mtu(struct vnic_dev *vdev)
600 if (!vnic_dev_notify_ready(vdev))
603 return vdev->notify_copy.mtu;
606 void vnic_dev_set_intr_mode(struct vnic_dev *vdev,
607 enum vnic_dev_intr_mode intr_mode)
609 vdev->intr_mode = intr_mode;
612 enum vnic_dev_intr_mode vnic_dev_get_intr_mode(
613 struct vnic_dev *vdev)
615 return vdev->intr_mode;
618 void vnic_dev_unregister(struct vnic_dev *vdev)
622 pci_free_consistent(vdev->pdev,
623 sizeof(struct vnic_devcmd_notify),
626 if (vdev->linkstatus)
627 pci_free_consistent(vdev->pdev,
630 vdev->linkstatus_pa);
632 pci_free_consistent(vdev->pdev,
633 sizeof(struct vnic_dev),
634 vdev->stats, vdev->stats_pa);
636 pci_free_consistent(vdev->pdev,
637 sizeof(struct vnic_devcmd_fw_info),
638 vdev->fw_info, vdev->fw_info_pa);
643 struct vnic_dev *vnic_dev_register(struct vnic_dev *vdev,
644 void *priv, struct pci_dev *pdev, struct vnic_dev_bar *bar)
647 vdev = kzalloc(sizeof(struct vnic_dev), GFP_ATOMIC);
655 if (vnic_dev_discover_res(vdev, bar))
658 vdev->devcmd = vnic_dev_get_res(vdev, RES_TYPE_DEVCMD, 0);
665 vnic_dev_unregister(vdev);