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"
38 #define VNIC_DEV_CAP_INIT 0x0001
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, unsigned int num_bars)
72 struct vnic_resource_header __iomem *rh;
73 struct vnic_resource __iomem *r;
79 if (bar->len < VNIC_MAX_RES_HDR_SIZE) {
80 printk(KERN_ERR "vNIC BAR0 res hdr length error\n");
86 printk(KERN_ERR "vNIC BAR0 res hdr not mem-mapped\n");
90 if (ioread32(&rh->magic) != VNIC_RES_MAGIC ||
91 ioread32(&rh->version) != VNIC_RES_VERSION) {
92 printk(KERN_ERR "vNIC BAR0 res magic/version error "
93 "exp (%lx/%lx) curr (%x/%x)\n",
94 VNIC_RES_MAGIC, VNIC_RES_VERSION,
95 ioread32(&rh->magic), ioread32(&rh->version));
99 r = (struct vnic_resource __iomem *)(rh + 1);
101 while ((type = ioread8(&r->type)) != RES_TYPE_EOL) {
103 u8 bar_num = ioread8(&r->bar);
104 u32 bar_offset = ioread32(&r->bar_offset);
105 u32 count = ioread32(&r->count);
110 if (bar_num >= num_bars)
113 if (!bar[bar_num].len || !bar[bar_num].vaddr)
120 case RES_TYPE_INTR_CTRL:
121 /* each count is stride bytes long */
122 len = count * VNIC_RES_STRIDE;
123 if (len + bar_offset > bar[bar_num].len) {
124 printk(KERN_ERR "vNIC BAR0 resource %d "
125 "out-of-bounds, offset 0x%x + "
126 "size 0x%x > bar len 0x%lx\n",
133 case RES_TYPE_INTR_PBA_LEGACY:
134 case RES_TYPE_DEVCMD:
141 vdev->res[type].count = count;
142 vdev->res[type].vaddr = (char __iomem *)bar[bar_num].vaddr +
144 vdev->res[type].bus_addr = bar[bar_num].bus_addr + bar_offset;
150 unsigned int vnic_dev_get_res_count(struct vnic_dev *vdev,
151 enum vnic_res_type type)
153 return vdev->res[type].count;
156 void __iomem *vnic_dev_get_res(struct vnic_dev *vdev, enum vnic_res_type type,
159 if (!vdev->res[type].vaddr)
166 case RES_TYPE_INTR_CTRL:
167 return (char __iomem *)vdev->res[type].vaddr +
168 index * VNIC_RES_STRIDE;
170 return (char __iomem *)vdev->res[type].vaddr;
174 dma_addr_t vnic_dev_get_res_bus_addr(struct vnic_dev *vdev,
175 enum vnic_res_type type, unsigned int index)
181 case RES_TYPE_INTR_CTRL:
182 return vdev->res[type].bus_addr +
183 index * VNIC_RES_STRIDE;
185 return vdev->res[type].bus_addr;
189 unsigned int vnic_dev_desc_ring_size(struct vnic_dev_ring *ring,
190 unsigned int desc_count, unsigned int desc_size)
192 /* The base address of the desc rings must be 512 byte aligned.
193 * Descriptor count is aligned to groups of 32 descriptors. A
194 * count of 0 means the maximum 4096 descriptors. Descriptor
195 * size is aligned to 16 bytes.
198 unsigned int count_align = 32;
199 unsigned int desc_align = 16;
201 ring->base_align = 512;
206 ring->desc_count = ALIGN(desc_count, count_align);
208 ring->desc_size = ALIGN(desc_size, desc_align);
210 ring->size = ring->desc_count * ring->desc_size;
211 ring->size_unaligned = ring->size + ring->base_align;
213 return ring->size_unaligned;
216 void vnic_dev_clear_desc_ring(struct vnic_dev_ring *ring)
218 memset(ring->descs, 0, ring->size);
221 int vnic_dev_alloc_desc_ring(struct vnic_dev *vdev, struct vnic_dev_ring *ring,
222 unsigned int desc_count, unsigned int desc_size)
224 vnic_dev_desc_ring_size(ring, desc_count, desc_size);
226 ring->descs_unaligned = pci_alloc_consistent(vdev->pdev,
227 ring->size_unaligned,
228 &ring->base_addr_unaligned);
230 if (!ring->descs_unaligned) {
232 "Failed to allocate ring (size=%d), aborting\n",
237 ring->base_addr = ALIGN(ring->base_addr_unaligned,
239 ring->descs = (u8 *)ring->descs_unaligned +
240 (ring->base_addr - ring->base_addr_unaligned);
242 vnic_dev_clear_desc_ring(ring);
244 ring->desc_avail = ring->desc_count - 1;
249 void vnic_dev_free_desc_ring(struct vnic_dev *vdev, struct vnic_dev_ring *ring)
252 pci_free_consistent(vdev->pdev,
253 ring->size_unaligned,
254 ring->descs_unaligned,
255 ring->base_addr_unaligned);
260 int vnic_dev_cmd(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd,
261 u64 *a0, u64 *a1, int wait)
263 struct vnic_devcmd __iomem *devcmd = vdev->devcmd;
268 status = ioread32(&devcmd->status);
269 if (status & STAT_BUSY) {
270 printk(KERN_ERR "Busy devcmd %d\n", _CMD_N(cmd));
274 if (_CMD_DIR(cmd) & _CMD_DIR_WRITE) {
275 writeq(*a0, &devcmd->args[0]);
276 writeq(*a1, &devcmd->args[1]);
280 iowrite32(cmd, &devcmd->cmd);
282 if ((_CMD_FLAGS(cmd) & _CMD_FLAGS_NOWAIT))
285 for (delay = 0; delay < wait; delay++) {
289 status = ioread32(&devcmd->status);
290 if (!(status & STAT_BUSY)) {
292 if (status & STAT_ERROR) {
293 err = (int)readq(&devcmd->args[0]);
294 if (err != ERR_ECMDUNKNOWN ||
295 cmd != CMD_CAPABILITY)
296 printk(KERN_ERR "Error %d devcmd %d\n",
301 if (_CMD_DIR(cmd) & _CMD_DIR_READ) {
303 *a0 = readq(&devcmd->args[0]);
304 *a1 = readq(&devcmd->args[1]);
311 printk(KERN_ERR "Timedout devcmd %d\n", _CMD_N(cmd));
315 static int vnic_dev_capable(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd)
317 u64 a0 = (u32)cmd, a1 = 0;
321 err = vnic_dev_cmd(vdev, CMD_CAPABILITY, &a0, &a1, wait);
326 int vnic_dev_fw_info(struct vnic_dev *vdev,
327 struct vnic_devcmd_fw_info **fw_info)
333 if (!vdev->fw_info) {
334 vdev->fw_info = pci_alloc_consistent(vdev->pdev,
335 sizeof(struct vnic_devcmd_fw_info),
340 a0 = vdev->fw_info_pa;
342 /* only get fw_info once and cache it */
343 err = vnic_dev_cmd(vdev, CMD_MCPU_FW_INFO, &a0, &a1, wait);
346 *fw_info = vdev->fw_info;
351 int vnic_dev_hw_version(struct vnic_dev *vdev, enum vnic_dev_hw_version *hw_ver)
353 struct vnic_devcmd_fw_info *fw_info;
356 err = vnic_dev_fw_info(vdev, &fw_info);
360 if (strncmp(fw_info->hw_version, "A1", sizeof("A1")) == 0)
361 *hw_ver = VNIC_DEV_HW_VER_A1;
362 else if (strncmp(fw_info->hw_version, "A2", sizeof("A2")) == 0)
363 *hw_ver = VNIC_DEV_HW_VER_A2;
365 *hw_ver = VNIC_DEV_HW_VER_UNKNOWN;
370 int vnic_dev_spec(struct vnic_dev *vdev, unsigned int offset, unsigned int size,
380 err = vnic_dev_cmd(vdev, CMD_DEV_SPEC, &a0, &a1, wait);
383 case 1: *(u8 *)value = (u8)a0; break;
384 case 2: *(u16 *)value = (u16)a0; break;
385 case 4: *(u32 *)value = (u32)a0; break;
386 case 8: *(u64 *)value = a0; break;
387 default: BUG(); break;
393 int vnic_dev_stats_clear(struct vnic_dev *vdev)
397 return vnic_dev_cmd(vdev, CMD_STATS_CLEAR, &a0, &a1, wait);
400 int vnic_dev_stats_dump(struct vnic_dev *vdev, struct vnic_stats **stats)
406 vdev->stats = pci_alloc_consistent(vdev->pdev,
407 sizeof(struct vnic_stats), &vdev->stats_pa);
412 *stats = vdev->stats;
414 a1 = sizeof(struct vnic_stats);
416 return vnic_dev_cmd(vdev, CMD_STATS_DUMP, &a0, &a1, wait);
419 int vnic_dev_close(struct vnic_dev *vdev)
423 return vnic_dev_cmd(vdev, CMD_CLOSE, &a0, &a1, wait);
426 int vnic_dev_enable(struct vnic_dev *vdev)
430 return vnic_dev_cmd(vdev, CMD_ENABLE, &a0, &a1, wait);
433 int vnic_dev_disable(struct vnic_dev *vdev)
437 return vnic_dev_cmd(vdev, CMD_DISABLE, &a0, &a1, wait);
440 int vnic_dev_open(struct vnic_dev *vdev, int arg)
442 u64 a0 = (u32)arg, a1 = 0;
444 return vnic_dev_cmd(vdev, CMD_OPEN, &a0, &a1, wait);
447 int vnic_dev_open_done(struct vnic_dev *vdev, int *done)
455 err = vnic_dev_cmd(vdev, CMD_OPEN_STATUS, &a0, &a1, wait);
464 int vnic_dev_soft_reset(struct vnic_dev *vdev, int arg)
466 u64 a0 = (u32)arg, a1 = 0;
468 return vnic_dev_cmd(vdev, CMD_SOFT_RESET, &a0, &a1, wait);
471 int vnic_dev_soft_reset_done(struct vnic_dev *vdev, int *done)
479 err = vnic_dev_cmd(vdev, CMD_SOFT_RESET_STATUS, &a0, &a1, wait);
488 int vnic_dev_hang_notify(struct vnic_dev *vdev)
492 return vnic_dev_cmd(vdev, CMD_HANG_NOTIFY, &a0, &a1, wait);
495 int vnic_dev_mac_addr(struct vnic_dev *vdev, u8 *mac_addr)
501 for (i = 0; i < ETH_ALEN; i++)
504 err = vnic_dev_cmd(vdev, CMD_MAC_ADDR, &a0, &a1, wait);
508 for (i = 0; i < ETH_ALEN; i++)
509 mac_addr[i] = ((u8 *)&a0)[i];
514 void vnic_dev_packet_filter(struct vnic_dev *vdev, int directed, int multicast,
515 int broadcast, int promisc, int allmulti)
521 a0 = (directed ? CMD_PFILTER_DIRECTED : 0) |
522 (multicast ? CMD_PFILTER_MULTICAST : 0) |
523 (broadcast ? CMD_PFILTER_BROADCAST : 0) |
524 (promisc ? CMD_PFILTER_PROMISCUOUS : 0) |
525 (allmulti ? CMD_PFILTER_ALL_MULTICAST : 0);
527 err = vnic_dev_cmd(vdev, CMD_PACKET_FILTER, &a0, &a1, wait);
529 printk(KERN_ERR "Can't set packet filter\n");
532 void vnic_dev_add_addr(struct vnic_dev *vdev, u8 *addr)
539 for (i = 0; i < ETH_ALEN; i++)
540 ((u8 *)&a0)[i] = addr[i];
542 err = vnic_dev_cmd(vdev, CMD_ADDR_ADD, &a0, &a1, wait);
544 printk(KERN_ERR "Can't add addr [%pM], %d\n", addr, err);
547 void vnic_dev_del_addr(struct vnic_dev *vdev, u8 *addr)
554 for (i = 0; i < ETH_ALEN; i++)
555 ((u8 *)&a0)[i] = addr[i];
557 err = vnic_dev_cmd(vdev, CMD_ADDR_DEL, &a0, &a1, wait);
559 printk(KERN_ERR "Can't del addr [%pM], %d\n", addr, err);
562 int vnic_dev_raise_intr(struct vnic_dev *vdev, u16 intr)
564 u64 a0 = intr, a1 = 0;
568 err = vnic_dev_cmd(vdev, CMD_IAR, &a0, &a1, wait);
570 printk(KERN_ERR "Failed to raise INTR[%d], err %d\n",
576 int vnic_dev_notify_set(struct vnic_dev *vdev, u16 intr)
583 vdev->notify = pci_alloc_consistent(vdev->pdev,
584 sizeof(struct vnic_devcmd_notify),
588 memset(vdev->notify, 0, sizeof(struct vnic_devcmd_notify));
591 a0 = vdev->notify_pa;
592 a1 = ((u64)intr << 32) & 0x0000ffff00000000ULL;
593 a1 += sizeof(struct vnic_devcmd_notify);
595 r = vnic_dev_cmd(vdev, CMD_NOTIFY, &a0, &a1, wait);
596 vdev->notify_sz = (r == 0) ? (u32)a1 : 0;
600 void vnic_dev_notify_unset(struct vnic_dev *vdev)
605 a0 = 0; /* paddr = 0 to unset notify buffer */
606 a1 = 0x0000ffff00000000ULL; /* intr num = -1 to unreg for intr */
607 a1 += sizeof(struct vnic_devcmd_notify);
609 vnic_dev_cmd(vdev, CMD_NOTIFY, &a0, &a1, wait);
613 static int vnic_dev_notify_ready(struct vnic_dev *vdev)
616 unsigned int nwords = vdev->notify_sz / 4;
620 if (!vdev->notify || !vdev->notify_sz)
625 memcpy(&vdev->notify_copy, vdev->notify, vdev->notify_sz);
626 words = (u32 *)&vdev->notify_copy;
627 for (i = 1; i < nwords; i++)
629 } while (csum != words[0]);
634 int vnic_dev_init(struct vnic_dev *vdev, int arg)
636 u64 a0 = (u32)arg, a1 = 0;
640 if (vdev->cap_flags & VNIC_DEV_CAP_INIT)
641 r = vnic_dev_cmd(vdev, CMD_INIT, &a0, &a1, wait);
643 vnic_dev_cmd(vdev, CMD_INIT_v1, &a0, &a1, wait);
644 if (a0 & CMD_INITF_DEFAULT_MAC) {
645 // Emulate these for old CMD_INIT_v1 which
646 // didn't pass a0 so no CMD_INITF_*.
647 vnic_dev_cmd(vdev, CMD_MAC_ADDR, &a0, &a1, wait);
648 vnic_dev_cmd(vdev, CMD_ADDR_ADD, &a0, &a1, wait);
654 int vnic_dev_link_status(struct vnic_dev *vdev)
656 if (vdev->linkstatus)
657 return *vdev->linkstatus;
659 if (!vnic_dev_notify_ready(vdev))
662 return vdev->notify_copy.link_state;
665 u32 vnic_dev_port_speed(struct vnic_dev *vdev)
667 if (!vnic_dev_notify_ready(vdev))
670 return vdev->notify_copy.port_speed;
673 u32 vnic_dev_msg_lvl(struct vnic_dev *vdev)
675 if (!vnic_dev_notify_ready(vdev))
678 return vdev->notify_copy.msglvl;
681 u32 vnic_dev_mtu(struct vnic_dev *vdev)
683 if (!vnic_dev_notify_ready(vdev))
686 return vdev->notify_copy.mtu;
689 u32 vnic_dev_link_down_cnt(struct vnic_dev *vdev)
691 if (!vnic_dev_notify_ready(vdev))
694 return vdev->notify_copy.link_down_cnt;
697 u32 vnic_dev_notify_status(struct vnic_dev *vdev)
699 if (!vnic_dev_notify_ready(vdev))
702 return vdev->notify_copy.status;
705 void vnic_dev_set_intr_mode(struct vnic_dev *vdev,
706 enum vnic_dev_intr_mode intr_mode)
708 vdev->intr_mode = intr_mode;
711 enum vnic_dev_intr_mode vnic_dev_get_intr_mode(
712 struct vnic_dev *vdev)
714 return vdev->intr_mode;
717 void vnic_dev_unregister(struct vnic_dev *vdev)
721 pci_free_consistent(vdev->pdev,
722 sizeof(struct vnic_devcmd_notify),
725 if (vdev->linkstatus)
726 pci_free_consistent(vdev->pdev,
729 vdev->linkstatus_pa);
731 pci_free_consistent(vdev->pdev,
732 sizeof(struct vnic_dev),
733 vdev->stats, vdev->stats_pa);
735 pci_free_consistent(vdev->pdev,
736 sizeof(struct vnic_devcmd_fw_info),
737 vdev->fw_info, vdev->fw_info_pa);
742 struct vnic_dev *vnic_dev_register(struct vnic_dev *vdev,
743 void *priv, struct pci_dev *pdev, struct vnic_dev_bar *bar,
744 unsigned int num_bars)
747 vdev = kzalloc(sizeof(struct vnic_dev), GFP_ATOMIC);
755 if (vnic_dev_discover_res(vdev, bar, num_bars))
758 vdev->devcmd = vnic_dev_get_res(vdev, RES_TYPE_DEVCMD, 0);
764 if (vnic_dev_capable(vdev, CMD_INIT))
765 vdev->cap_flags |= VNIC_DEV_CAP_INIT;
770 vnic_dev_unregister(vdev);