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
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 "vnic_resource.h"
26 #include "vnic_devcmd.h"
28 #include "vnic_stats.h"
38 struct vnic_res res[RES_TYPE_MAX];
39 enum vnic_dev_intr_mode intr_mode;
40 struct vnic_devcmd __iomem *devcmd;
41 struct vnic_devcmd_notify *notify;
42 struct vnic_devcmd_notify notify_copy;
45 dma_addr_t linkstatus_pa;
46 struct vnic_stats *stats;
48 struct vnic_devcmd_fw_info *fw_info;
49 dma_addr_t fw_info_pa;
52 #define VNIC_MAX_RES_HDR_SIZE \
53 (sizeof(struct vnic_resource_header) + \
54 sizeof(struct vnic_resource) * RES_TYPE_MAX)
55 #define VNIC_RES_STRIDE 128
57 void *vnic_dev_priv(struct vnic_dev *vdev)
62 static int vnic_dev_discover_res(struct vnic_dev *vdev,
63 struct vnic_dev_bar *bar)
65 struct vnic_resource_header __iomem *rh;
66 struct vnic_resource __iomem *r;
69 if (bar->len < VNIC_MAX_RES_HDR_SIZE) {
70 printk(KERN_ERR "vNIC BAR0 res hdr length error\n");
76 printk(KERN_ERR "vNIC BAR0 res hdr not mem-mapped\n");
80 if (ioread32(&rh->magic) != VNIC_RES_MAGIC ||
81 ioread32(&rh->version) != VNIC_RES_VERSION) {
82 printk(KERN_ERR "vNIC BAR0 res magic/version error "
83 "exp (%lx/%lx) curr (%x/%x)\n",
84 VNIC_RES_MAGIC, VNIC_RES_VERSION,
85 ioread32(&rh->magic), ioread32(&rh->version));
89 r = (struct vnic_resource __iomem *)(rh + 1);
91 while ((type = ioread8(&r->type)) != RES_TYPE_EOL) {
93 u8 bar_num = ioread8(&r->bar);
94 u32 bar_offset = ioread32(&r->bar_offset);
95 u32 count = ioread32(&r->count);
100 if (bar_num != 0) /* only mapping in BAR0 resources */
107 case RES_TYPE_INTR_CTRL:
108 /* each count is stride bytes long */
109 len = count * VNIC_RES_STRIDE;
110 if (len + bar_offset > bar->len) {
111 printk(KERN_ERR "vNIC BAR0 resource %d "
112 "out-of-bounds, offset 0x%x + "
113 "size 0x%x > bar len 0x%lx\n",
120 case RES_TYPE_INTR_PBA_LEGACY:
121 case RES_TYPE_DEVCMD:
128 vdev->res[type].count = count;
129 vdev->res[type].vaddr = (char __iomem *)bar->vaddr + bar_offset;
135 unsigned int vnic_dev_get_res_count(struct vnic_dev *vdev,
136 enum vnic_res_type type)
138 return vdev->res[type].count;
141 void __iomem *vnic_dev_get_res(struct vnic_dev *vdev, enum vnic_res_type type,
144 if (!vdev->res[type].vaddr)
151 case RES_TYPE_INTR_CTRL:
152 return (char __iomem *)vdev->res[type].vaddr +
153 index * VNIC_RES_STRIDE;
155 return (char __iomem *)vdev->res[type].vaddr;
159 unsigned int vnic_dev_desc_ring_size(struct vnic_dev_ring *ring,
160 unsigned int desc_count,
161 unsigned int desc_size)
163 /* The base address of the desc rings must be 512 byte aligned.
164 * Descriptor count is aligned to groups of 32 descriptors. A
165 * count of 0 means the maximum 4096 descriptors. Descriptor
166 * size is aligned to 16 bytes.
169 unsigned int count_align = 32;
170 unsigned int desc_align = 16;
172 ring->base_align = 512;
177 ring->desc_count = ALIGN(desc_count, count_align);
179 ring->desc_size = ALIGN(desc_size, desc_align);
181 ring->size = ring->desc_count * ring->desc_size;
182 ring->size_unaligned = ring->size + ring->base_align;
184 return ring->size_unaligned;
187 void vnic_dev_clear_desc_ring(struct vnic_dev_ring *ring)
189 memset(ring->descs, 0, ring->size);
192 int vnic_dev_alloc_desc_ring(struct vnic_dev *vdev, struct vnic_dev_ring *ring,
193 unsigned int desc_count, unsigned int desc_size)
195 vnic_dev_desc_ring_size(ring, desc_count, desc_size);
197 ring->descs_unaligned = pci_alloc_consistent(vdev->pdev,
198 ring->size_unaligned,
199 &ring->base_addr_unaligned);
201 if (!ring->descs_unaligned) {
203 "Failed to allocate ring (size=%d), aborting\n",
208 ring->base_addr = ALIGN(ring->base_addr_unaligned,
210 ring->descs = (u8 *)ring->descs_unaligned +
211 (ring->base_addr - ring->base_addr_unaligned);
213 vnic_dev_clear_desc_ring(ring);
215 ring->desc_avail = ring->desc_count - 1;
220 void vnic_dev_free_desc_ring(struct vnic_dev *vdev, struct vnic_dev_ring *ring)
223 pci_free_consistent(vdev->pdev,
224 ring->size_unaligned,
225 ring->descs_unaligned,
226 ring->base_addr_unaligned);
231 int vnic_dev_cmd(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd,
232 u64 *a0, u64 *a1, int wait)
234 struct vnic_devcmd __iomem *devcmd = vdev->devcmd;
237 int dev_cmd_err[] = {
238 /* convert from fw's version of error.h to host's version */
240 EINVAL, /* ERR_EINVAL */
241 EFAULT, /* ERR_EFAULT */
242 EPERM, /* ERR_EPERM */
243 EBUSY, /* ERR_EBUSY */
247 status = ioread32(&devcmd->status);
248 if (status & STAT_BUSY) {
249 printk(KERN_ERR "Busy devcmd %d\n", _CMD_N(cmd));
253 if (_CMD_DIR(cmd) & _CMD_DIR_WRITE) {
254 writeq(*a0, &devcmd->args[0]);
255 writeq(*a1, &devcmd->args[1]);
259 iowrite32(cmd, &devcmd->cmd);
261 if ((_CMD_FLAGS(cmd) & _CMD_FLAGS_NOWAIT))
264 for (delay = 0; delay < wait; delay++) {
268 status = ioread32(&devcmd->status);
269 if (!(status & STAT_BUSY)) {
271 if (status & STAT_ERROR) {
272 err = dev_cmd_err[(int)readq(&devcmd->args[0])];
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 int vnic_dev_fw_info(struct vnic_dev *vdev,
293 struct vnic_devcmd_fw_info **fw_info)
299 if (!vdev->fw_info) {
300 vdev->fw_info = pci_alloc_consistent(vdev->pdev,
301 sizeof(struct vnic_devcmd_fw_info),
306 a0 = vdev->fw_info_pa;
308 /* only get fw_info once and cache it */
309 err = vnic_dev_cmd(vdev, CMD_MCPU_FW_INFO, &a0, &a1, wait);
312 *fw_info = vdev->fw_info;
317 int vnic_dev_spec(struct vnic_dev *vdev, unsigned int offset, unsigned int size,
327 err = vnic_dev_cmd(vdev, CMD_DEV_SPEC, &a0, &a1, wait);
331 *(u8 *)value = (u8)a0;
334 *(u16 *)value = (u16)a0;
337 *(u32 *)value = (u32)a0;
350 int vnic_dev_stats_clear(struct vnic_dev *vdev)
354 return vnic_dev_cmd(vdev, CMD_STATS_CLEAR, &a0, &a1, wait);
357 int vnic_dev_stats_dump(struct vnic_dev *vdev, struct vnic_stats **stats)
363 vdev->stats = pci_alloc_consistent(vdev->pdev,
364 sizeof(struct vnic_stats), &vdev->stats_pa);
369 *stats = vdev->stats;
371 a1 = sizeof(struct vnic_stats);
373 return vnic_dev_cmd(vdev, CMD_STATS_DUMP, &a0, &a1, wait);
376 int vnic_dev_close(struct vnic_dev *vdev)
380 return vnic_dev_cmd(vdev, CMD_CLOSE, &a0, &a1, wait);
383 int vnic_dev_enable(struct vnic_dev *vdev)
387 return vnic_dev_cmd(vdev, CMD_ENABLE, &a0, &a1, wait);
390 int vnic_dev_disable(struct vnic_dev *vdev)
394 return vnic_dev_cmd(vdev, CMD_DISABLE, &a0, &a1, wait);
397 int vnic_dev_open(struct vnic_dev *vdev, int arg)
399 u64 a0 = (u32)arg, a1 = 0;
401 return vnic_dev_cmd(vdev, CMD_OPEN, &a0, &a1, wait);
404 int vnic_dev_open_done(struct vnic_dev *vdev, int *done)
412 err = vnic_dev_cmd(vdev, CMD_OPEN_STATUS, &a0, &a1, wait);
421 int vnic_dev_soft_reset(struct vnic_dev *vdev, int arg)
423 u64 a0 = (u32)arg, a1 = 0;
425 return vnic_dev_cmd(vdev, CMD_SOFT_RESET, &a0, &a1, wait);
428 int vnic_dev_soft_reset_done(struct vnic_dev *vdev, int *done)
436 err = vnic_dev_cmd(vdev, CMD_SOFT_RESET_STATUS, &a0, &a1, wait);
445 int vnic_dev_hang_notify(struct vnic_dev *vdev)
449 return vnic_dev_cmd(vdev, CMD_HANG_NOTIFY, &a0, &a1, wait);
452 int vnic_dev_mac_addr(struct vnic_dev *vdev, u8 *mac_addr)
458 for (i = 0; i < ETH_ALEN; i++)
461 err = vnic_dev_cmd(vdev, CMD_MAC_ADDR, &a0, &a1, wait);
465 for (i = 0; i < ETH_ALEN; i++)
466 mac_addr[i] = ((u8 *)&a0)[i];
471 void vnic_dev_packet_filter(struct vnic_dev *vdev, int directed, int multicast,
472 int broadcast, int promisc, int allmulti)
478 a0 = (directed ? CMD_PFILTER_DIRECTED : 0) |
479 (multicast ? CMD_PFILTER_MULTICAST : 0) |
480 (broadcast ? CMD_PFILTER_BROADCAST : 0) |
481 (promisc ? CMD_PFILTER_PROMISCUOUS : 0) |
482 (allmulti ? CMD_PFILTER_ALL_MULTICAST : 0);
484 err = vnic_dev_cmd(vdev, CMD_PACKET_FILTER, &a0, &a1, wait);
486 printk(KERN_ERR "Can't set packet filter\n");
489 void vnic_dev_add_addr(struct vnic_dev *vdev, u8 *addr)
496 for (i = 0; i < ETH_ALEN; i++)
497 ((u8 *)&a0)[i] = addr[i];
499 err = vnic_dev_cmd(vdev, CMD_ADDR_ADD, &a0, &a1, wait);
502 "Can't add addr [%02x:%02x:%02x:%02x:%02x:%02x], %d\n",
503 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5],
507 void vnic_dev_del_addr(struct vnic_dev *vdev, u8 *addr)
514 for (i = 0; i < ETH_ALEN; i++)
515 ((u8 *)&a0)[i] = addr[i];
517 err = vnic_dev_cmd(vdev, CMD_ADDR_DEL, &a0, &a1, wait);
520 "Can't del addr [%02x:%02x:%02x:%02x:%02x:%02x], %d\n",
521 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5],
525 int vnic_dev_notify_set(struct vnic_dev *vdev, u16 intr)
531 vdev->notify = pci_alloc_consistent(vdev->pdev,
532 sizeof(struct vnic_devcmd_notify),
538 a0 = vdev->notify_pa;
539 a1 = ((u64)intr << 32) & 0x0000ffff00000000ULL;
540 a1 += sizeof(struct vnic_devcmd_notify);
542 return vnic_dev_cmd(vdev, CMD_NOTIFY, &a0, &a1, wait);
545 void vnic_dev_notify_unset(struct vnic_dev *vdev)
550 a0 = 0; /* paddr = 0 to unset notify buffer */
551 a1 = 0x0000ffff00000000ULL; /* intr num = -1 to unreg for intr */
552 a1 += sizeof(struct vnic_devcmd_notify);
554 vnic_dev_cmd(vdev, CMD_NOTIFY, &a0, &a1, wait);
557 static int vnic_dev_notify_ready(struct vnic_dev *vdev)
560 unsigned int nwords = sizeof(struct vnic_devcmd_notify) / 4;
569 memcpy(&vdev->notify_copy, vdev->notify,
570 sizeof(struct vnic_devcmd_notify));
571 words = (u32 *)&vdev->notify_copy;
572 for (i = 1; i < nwords; i++)
574 } while (csum != words[0]);
579 int vnic_dev_init(struct vnic_dev *vdev, int arg)
581 u64 a0 = (u32)arg, a1 = 0;
583 return vnic_dev_cmd(vdev, CMD_INIT, &a0, &a1, wait);
586 int vnic_dev_link_status(struct vnic_dev *vdev)
588 if (vdev->linkstatus)
589 return *vdev->linkstatus;
591 if (!vnic_dev_notify_ready(vdev))
594 return vdev->notify_copy.link_state;
597 u32 vnic_dev_port_speed(struct vnic_dev *vdev)
599 if (!vnic_dev_notify_ready(vdev))
602 return vdev->notify_copy.port_speed;
605 u32 vnic_dev_msg_lvl(struct vnic_dev *vdev)
607 if (!vnic_dev_notify_ready(vdev))
610 return vdev->notify_copy.msglvl;
613 u32 vnic_dev_mtu(struct vnic_dev *vdev)
615 if (!vnic_dev_notify_ready(vdev))
618 return vdev->notify_copy.mtu;
621 u32 vnic_dev_link_down_cnt(struct vnic_dev *vdev)
623 if (!vnic_dev_notify_ready(vdev))
626 return vdev->notify_copy.link_down_cnt;
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_KERNEL);
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);