drivers/net/ethernet/cisco/enic/vnic_dev.c

   1 /*
   2  * Copyright 2008-2010 Cisco Systems, Inc.  All rights reserved.
   3  * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
   4  *
   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.
   8  *
   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
  16  * SOFTWARE.
  17  *
  18  */
  19
  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>
  26
  27 #include "vnic_resource.h"
  28 #include "vnic_devcmd.h"
  29 #include "vnic_dev.h"
  30 #include "vnic_stats.h"
  31
  32 enum vnic_proxy_type {
  33         PROXY_NONE,
  34         PROXY_BY_BDF,
  35         PROXY_BY_INDEX,
  36 };
  37
  38 struct vnic_res {
  39         void __iomem *vaddr;
  40         dma_addr_t bus_addr;
  41         unsigned int count;
  42 };
  43
  44 struct vnic_intr_coal_timer_info {
  45         u32 mul;
  46         u32 div;
  47         u32 max_usec;
  48 };
  49
  50 struct vnic_dev {
  51         void *priv;
  52         struct pci_dev *pdev;
  53         struct vnic_res res[RES_TYPE_MAX];
  54         enum vnic_dev_intr_mode intr_mode;
  55         struct vnic_devcmd __iomem *devcmd;
  56         struct vnic_devcmd_notify *notify;
  57         struct vnic_devcmd_notify notify_copy;
  58         dma_addr_t notify_pa;
  59         u32 notify_sz;
  60         dma_addr_t linkstatus_pa;
  61         struct vnic_stats *stats;
  62         dma_addr_t stats_pa;
  63         struct vnic_devcmd_fw_info *fw_info;
  64         dma_addr_t fw_info_pa;
  65         enum vnic_proxy_type proxy;
  66         u32 proxy_index;
  67         u64 args[VNIC_DEVCMD_NARGS];
  68         struct vnic_intr_coal_timer_info intr_coal_timer_info;
  69 };
  70
  71 #define VNIC_MAX_RES_HDR_SIZE \
  72         (sizeof(struct vnic_resource_header) + \
  73         sizeof(struct vnic_resource) * RES_TYPE_MAX)
  74 #define VNIC_RES_STRIDE 128
  75
  76 void *vnic_dev_priv(struct vnic_dev *vdev)
  77 {
  78         return vdev->priv;
  79 }
  80
  81 static int vnic_dev_discover_res(struct vnic_dev *vdev,
  82         struct vnic_dev_bar *bar, unsigned int num_bars)
  83 {
  84         struct vnic_resource_header __iomem *rh;
  85         struct mgmt_barmap_hdr __iomem *mrh;
  86         struct vnic_resource __iomem *r;
  87         u8 type;
  88
  89         if (num_bars == 0)
  90                 return -EINVAL;
  91
  92         if (bar->len < VNIC_MAX_RES_HDR_SIZE) {
  93                 pr_err("vNIC BAR0 res hdr length error\n");
  94                 return -EINVAL;
  95         }
  96
  97         rh  = bar->vaddr;
  98         mrh = bar->vaddr;
  99         if (!rh) {
 100                 pr_err("vNIC BAR0 res hdr not mem-mapped\n");
 101                 return -EINVAL;
 102         }
 103
 104         /* Check for mgmt vnic in addition to normal vnic */
 105         if ((ioread32(&rh->magic) != VNIC_RES_MAGIC) ||
 106                 (ioread32(&rh->version) != VNIC_RES_VERSION)) {
 107                 if ((ioread32(&mrh->magic) != MGMTVNIC_MAGIC) ||
 108                         (ioread32(&mrh->version) != MGMTVNIC_VERSION)) {
 109                         pr_err("vNIC BAR0 res magic/version error "
 110                         "exp (%lx/%lx) or (%lx/%lx), curr (%x/%x)\n",
 111                         VNIC_RES_MAGIC, VNIC_RES_VERSION,
 112                         MGMTVNIC_MAGIC, MGMTVNIC_VERSION,
 113                         ioread32(&rh->magic), ioread32(&rh->version));
 114                         return -EINVAL;
 115                 }
 116         }
 117
 118         if (ioread32(&mrh->magic) == MGMTVNIC_MAGIC)
 119                 r = (struct vnic_resource __iomem *)(mrh + 1);
 120         else
 121                 r = (struct vnic_resource __iomem *)(rh + 1);
 122
 123
 124         while ((type = ioread8(&r->type)) != RES_TYPE_EOL) {
 125
 126                 u8 bar_num = ioread8(&r->bar);
 127                 u32 bar_offset = ioread32(&r->bar_offset);
 128                 u32 count = ioread32(&r->count);
 129                 u32 len;
 130
 131                 r++;
 132
 133                 if (bar_num >= num_bars)
 134                         continue;
 135
 136                 if (!bar[bar_num].len || !bar[bar_num].vaddr)
 137                         continue;
 138
 139                 switch (type) {
 140                 case RES_TYPE_WQ:
 141                 case RES_TYPE_RQ:
 142                 case RES_TYPE_CQ:
 143                 case RES_TYPE_INTR_CTRL:
 144                         /* each count is stride bytes long */
 145                         len = count * VNIC_RES_STRIDE;
 146                         if (len + bar_offset > bar[bar_num].len) {
 147                                 pr_err("vNIC BAR0 resource %d "
 148                                         "out-of-bounds, offset 0x%x + "
 149                                         "size 0x%x > bar len 0x%lx\n",
 150                                         type, bar_offset,
 151                                         len,
 152                                         bar[bar_num].len);
 153                                 return -EINVAL;
 154                         }
 155                         break;
 156                 case RES_TYPE_INTR_PBA_LEGACY:
 157                 case RES_TYPE_DEVCMD:
 158                         len = count;
 159                         break;
 160                 default:
 161                         continue;
 162                 }
 163
 164                 vdev->res[type].count = count;
 165                 vdev->res[type].vaddr = (char __iomem *)bar[bar_num].vaddr +
 166                         bar_offset;
 167                 vdev->res[type].bus_addr = bar[bar_num].bus_addr + bar_offset;
 168         }
 169
 170         return 0;
 171 }
 172
 173 unsigned int vnic_dev_get_res_count(struct vnic_dev *vdev,
 174         enum vnic_res_type type)
 175 {
 176         return vdev->res[type].count;
 177 }
 178
 179 void __iomem *vnic_dev_get_res(struct vnic_dev *vdev, enum vnic_res_type type,
 180         unsigned int index)
 181 {
 182         if (!vdev->res[type].vaddr)
 183                 return NULL;
 184
 185         switch (type) {
 186         case RES_TYPE_WQ:
 187         case RES_TYPE_RQ:
 188         case RES_TYPE_CQ:
 189         case RES_TYPE_INTR_CTRL:
 190                 return (char __iomem *)vdev->res[type].vaddr +
 191                         index * VNIC_RES_STRIDE;
 192         default:
 193                 return (char __iomem *)vdev->res[type].vaddr;
 194         }
 195 }
 196
 197 static unsigned int vnic_dev_desc_ring_size(struct vnic_dev_ring *ring,
 198         unsigned int desc_count, unsigned int desc_size)
 199 {
 200         /* The base address of the desc rings must be 512 byte aligned.
 201          * Descriptor count is aligned to groups of 32 descriptors.  A
 202          * count of 0 means the maximum 4096 descriptors.  Descriptor
 203          * size is aligned to 16 bytes.
 204          */
 205
 206         unsigned int count_align = 32;
 207         unsigned int desc_align = 16;
 208
 209         ring->base_align = 512;
 210
 211         if (desc_count == 0)
 212                 desc_count = 4096;
 213
 214         ring->desc_count = ALIGN(desc_count, count_align);
 215
 216         ring->desc_size = ALIGN(desc_size, desc_align);
 217
 218         ring->size = ring->desc_count * ring->desc_size;
 219         ring->size_unaligned = ring->size + ring->base_align;
 220
 221         return ring->size_unaligned;
 222 }
 223
 224 void vnic_dev_clear_desc_ring(struct vnic_dev_ring *ring)
 225 {
 226         memset(ring->descs, 0, ring->size);
 227 }
 228
 229 int vnic_dev_alloc_desc_ring(struct vnic_dev *vdev, struct vnic_dev_ring *ring,
 230         unsigned int desc_count, unsigned int desc_size)
 231 {
 232         vnic_dev_desc_ring_size(ring, desc_count, desc_size);
 233
 234         ring->descs_unaligned = pci_alloc_consistent(vdev->pdev,
 235                 ring->size_unaligned,
 236                 &ring->base_addr_unaligned);
 237
 238         if (!ring->descs_unaligned) {
 239                 pr_err("Failed to allocate ring (size=%d), aborting\n",
 240                         (int)ring->size);
 241                 return -ENOMEM;
 242         }
 243
 244         ring->base_addr = ALIGN(ring->base_addr_unaligned,
 245                 ring->base_align);
 246         ring->descs = (u8 *)ring->descs_unaligned +
 247                 (ring->base_addr - ring->base_addr_unaligned);
 248
 249         vnic_dev_clear_desc_ring(ring);
 250
 251         ring->desc_avail = ring->desc_count - 1;
 252
 253         return 0;
 254 }
 255
 256 void vnic_dev_free_desc_ring(struct vnic_dev *vdev, struct vnic_dev_ring *ring)
 257 {
 258         if (ring->descs) {
 259                 pci_free_consistent(vdev->pdev,
 260                         ring->size_unaligned,
 261                         ring->descs_unaligned,
 262                         ring->base_addr_unaligned);
 263                 ring->descs = NULL;
 264         }
 265 }
 266
 267 static int _vnic_dev_cmd(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd,
 268         int wait)
 269 {
 270         struct vnic_devcmd __iomem *devcmd = vdev->devcmd;
 271         unsigned int i;
 272         int delay;
 273         u32 status;
 274         int err;
 275
 276         status = ioread32(&devcmd->status);
 277         if (status == 0xFFFFFFFF) {
 278                 /* PCI-e target device is gone */
 279                 return -ENODEV;
 280         }
 281         if (status & STAT_BUSY) {
 282                 pr_err("Busy devcmd %d\n", _CMD_N(cmd));
 283                 return -EBUSY;
 284         }
 285
 286         if (_CMD_DIR(cmd) & _CMD_DIR_WRITE) {
 287                 for (i = 0; i < VNIC_DEVCMD_NARGS; i++)
 288                         writeq(vdev->args[i], &devcmd->args[i]);
 289                 wmb();
 290         }
 291
 292         iowrite32(cmd, &devcmd->cmd);
 293
 294         if ((_CMD_FLAGS(cmd) & _CMD_FLAGS_NOWAIT))
 295                 return 0;
 296
 297         for (delay = 0; delay < wait; delay++) {
 298
 299                 udelay(100);
 300
 301                 status = ioread32(&devcmd->status);
 302                 if (status == 0xFFFFFFFF) {
 303                         /* PCI-e target device is gone */
 304                         return -ENODEV;
 305                 }
 306
 307                 if (!(status & STAT_BUSY)) {
 308
 309                         if (status & STAT_ERROR) {
 310                                 err = (int)readq(&devcmd->args[0]);
 311                                 if (err != ERR_ECMDUNKNOWN ||
 312                                     cmd != CMD_CAPABILITY)
 313                                         pr_err("Error %d devcmd %d\n",
 314                                                 err, _CMD_N(cmd));
 315                                 return err;
 316                         }
 317
 318                         if (_CMD_DIR(cmd) & _CMD_DIR_READ) {
 319                                 rmb();
 320                                 for (i = 0; i < VNIC_DEVCMD_NARGS; i++)
 321                                         vdev->args[i] = readq(&devcmd->args[i]);
 322                         }
 323
 324                         return 0;
 325                 }
 326         }
 327
 328         pr_err("Timedout devcmd %d\n", _CMD_N(cmd));
 329         return -ETIMEDOUT;
 330 }
 331
 332 static int vnic_dev_cmd_proxy(struct vnic_dev *vdev,
 333         enum vnic_devcmd_cmd proxy_cmd, enum vnic_devcmd_cmd cmd,
 334         u64 *a0, u64 *a1, int wait)
 335 {
 336         u32 status;
 337         int err;
 338
 339         memset(vdev->args, 0, sizeof(vdev->args));
 340
 341         vdev->args[0] = vdev->proxy_index;
 342         vdev->args[1] = cmd;
 343         vdev->args[2] = *a0;
 344         vdev->args[3] = *a1;
 345
 346         err = _vnic_dev_cmd(vdev, proxy_cmd, wait);
 347         if (err)
 348                 return err;
 349
 350         status = (u32)vdev->args[0];
 351         if (status & STAT_ERROR) {
 352                 err = (int)vdev->args[1];
 353                 if (err != ERR_ECMDUNKNOWN ||
 354                     cmd != CMD_CAPABILITY)
 355                         pr_err("Error %d proxy devcmd %d\n", err, _CMD_N(cmd));
 356                 return err;
 357         }
 358
 359         *a0 = vdev->args[1];
 360         *a1 = vdev->args[2];
 361
 362         return 0;
 363 }
 364
 365 static int vnic_dev_cmd_no_proxy(struct vnic_dev *vdev,
 366         enum vnic_devcmd_cmd cmd, u64 *a0, u64 *a1, int wait)
 367 {
 368         int err;
 369
 370         vdev->args[0] = *a0;
 371         vdev->args[1] = *a1;
 372
 373         err = _vnic_dev_cmd(vdev, cmd, wait);
 374
 375         *a0 = vdev->args[0];
 376         *a1 = vdev->args[1];
 377
 378         return err;
 379 }
 380
 381 void vnic_dev_cmd_proxy_by_index_start(struct vnic_dev *vdev, u16 index)
 382 {
 383         vdev->proxy = PROXY_BY_INDEX;
 384         vdev->proxy_index = index;
 385 }
 386
 387 void vnic_dev_cmd_proxy_end(struct vnic_dev *vdev)
 388 {
 389         vdev->proxy = PROXY_NONE;
 390         vdev->proxy_index = 0;
 391 }
 392
 393 int vnic_dev_cmd(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd,
 394         u64 *a0, u64 *a1, int wait)
 395 {
 396         memset(vdev->args, 0, sizeof(vdev->args));
 397
 398         switch (vdev->proxy) {
 399         case PROXY_BY_INDEX:
 400                 return vnic_dev_cmd_proxy(vdev, CMD_PROXY_BY_INDEX, cmd,
 401                                 a0, a1, wait);
 402         case PROXY_BY_BDF:
 403                 return vnic_dev_cmd_proxy(vdev, CMD_PROXY_BY_BDF, cmd,
 404                                 a0, a1, wait);
 405         case PROXY_NONE:
 406         default:
 407                 return vnic_dev_cmd_no_proxy(vdev, cmd, a0, a1, wait);
 408         }
 409 }
 410
 411 static int vnic_dev_capable(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd)
 412 {
 413         u64 a0 = (u32)cmd, a1 = 0;
 414         int wait = 1000;
 415         int err;
 416
 417         err = vnic_dev_cmd(vdev, CMD_CAPABILITY, &a0, &a1, wait);
 418
 419         return !(err || a0);
 420 }
 421
 422 int vnic_dev_fw_info(struct vnic_dev *vdev,
 423         struct vnic_devcmd_fw_info **fw_info)
 424 {
 425         u64 a0, a1 = 0;
 426         int wait = 1000;
 427         int err = 0;
 428
 429         if (!vdev->fw_info) {
 430                 vdev->fw_info = pci_alloc_consistent(vdev->pdev,
 431                         sizeof(struct vnic_devcmd_fw_info),
 432                         &vdev->fw_info_pa);
 433                 if (!vdev->fw_info)
 434                         return -ENOMEM;
 435
 436                 memset(vdev->fw_info, 0, sizeof(struct vnic_devcmd_fw_info));
 437
 438                 a0 = vdev->fw_info_pa;
 439                 a1 = sizeof(struct vnic_devcmd_fw_info);
 440
 441                 /* only get fw_info once and cache it */
 442                 err = vnic_dev_cmd(vdev, CMD_MCPU_FW_INFO, &a0, &a1, wait);
 443                 if (err == ERR_ECMDUNKNOWN) {
 444                         err = vnic_dev_cmd(vdev, CMD_MCPU_FW_INFO_OLD,
 445                                 &a0, &a1, wait);
 446                 }
 447         }
 448
 449         *fw_info = vdev->fw_info;
 450
 451         return err;
 452 }
 453
 454 int vnic_dev_spec(struct vnic_dev *vdev, unsigned int offset, unsigned int size,
 455         void *value)
 456 {
 457         u64 a0, a1;
 458         int wait = 1000;
 459         int err;
 460
 461         a0 = offset;
 462         a1 = size;
 463
 464         err = vnic_dev_cmd(vdev, CMD_DEV_SPEC, &a0, &a1, wait);
 465
 466         switch (size) {
 467         case 1: *(u8 *)value = (u8)a0; break;
 468         case 2: *(u16 *)value = (u16)a0; break;
 469         case 4: *(u32 *)value = (u32)a0; break;
 470         case 8: *(u64 *)value = a0; break;
 471         default: BUG(); break;
 472         }
 473
 474         return err;
 475 }
 476
 477 int vnic_dev_stats_dump(struct vnic_dev *vdev, struct vnic_stats **stats)
 478 {
 479         u64 a0, a1;
 480         int wait = 1000;
 481
 482         if (!vdev->stats) {
 483                 vdev->stats = pci_alloc_consistent(vdev->pdev,
 484                         sizeof(struct vnic_stats), &vdev->stats_pa);
 485                 if (!vdev->stats)
 486                         return -ENOMEM;
 487         }
 488
 489         *stats = vdev->stats;
 490         a0 = vdev->stats_pa;
 491         a1 = sizeof(struct vnic_stats);
 492
 493         return vnic_dev_cmd(vdev, CMD_STATS_DUMP, &a0, &a1, wait);
 494 }
 495
 496 int vnic_dev_close(struct vnic_dev *vdev)
 497 {
 498         u64 a0 = 0, a1 = 0;
 499         int wait = 1000;
 500         return vnic_dev_cmd(vdev, CMD_CLOSE, &a0, &a1, wait);
 501 }
 502
 503 int vnic_dev_enable_wait(struct vnic_dev *vdev)
 504 {
 505         u64 a0 = 0, a1 = 0;
 506         int wait = 1000;
 507         int err;
 508
 509         err = vnic_dev_cmd(vdev, CMD_ENABLE_WAIT, &a0, &a1, wait);
 510         if (err == ERR_ECMDUNKNOWN)
 511                 return vnic_dev_cmd(vdev, CMD_ENABLE, &a0, &a1, wait);
 512
 513         return err;
 514 }
 515
 516 int vnic_dev_disable(struct vnic_dev *vdev)
 517 {
 518         u64 a0 = 0, a1 = 0;
 519         int wait = 1000;
 520         return vnic_dev_cmd(vdev, CMD_DISABLE, &a0, &a1, wait);
 521 }
 522
 523 int vnic_dev_open(struct vnic_dev *vdev, int arg)
 524 {
 525         u64 a0 = (u32)arg, a1 = 0;
 526         int wait = 1000;
 527         return vnic_dev_cmd(vdev, CMD_OPEN, &a0, &a1, wait);
 528 }
 529
 530 int vnic_dev_open_done(struct vnic_dev *vdev, int *done)
 531 {
 532         u64 a0 = 0, a1 = 0;
 533         int wait = 1000;
 534         int err;
 535
 536         *done = 0;
 537
 538         err = vnic_dev_cmd(vdev, CMD_OPEN_STATUS, &a0, &a1, wait);
 539         if (err)
 540                 return err;
 541
 542         *done = (a0 == 0);
 543
 544         return 0;
 545 }
 546
 547 static int vnic_dev_soft_reset(struct vnic_dev *vdev, int arg)
 548 {
 549         u64 a0 = (u32)arg, a1 = 0;
 550         int wait = 1000;
 551         return vnic_dev_cmd(vdev, CMD_SOFT_RESET, &a0, &a1, wait);
 552 }
 553
 554 static int vnic_dev_soft_reset_done(struct vnic_dev *vdev, int *done)
 555 {
 556         u64 a0 = 0, a1 = 0;
 557         int wait = 1000;
 558         int err;
 559
 560         *done = 0;
 561
 562         err = vnic_dev_cmd(vdev, CMD_SOFT_RESET_STATUS, &a0, &a1, wait);
 563         if (err)
 564                 return err;
 565
 566         *done = (a0 == 0);
 567
 568         return 0;
 569 }
 570
 571 int vnic_dev_hang_reset(struct vnic_dev *vdev, int arg)
 572 {
 573         u64 a0 = (u32)arg, a1 = 0;
 574         int wait = 1000;
 575         int err;
 576
 577         err = vnic_dev_cmd(vdev, CMD_HANG_RESET, &a0, &a1, wait);
 578         if (err == ERR_ECMDUNKNOWN) {
 579                 err = vnic_dev_soft_reset(vdev, arg);
 580                 if (err)
 581                         return err;
 582
 583                 return vnic_dev_init(vdev, 0);
 584         }
 585
 586         return err;
 587 }
 588
 589 int vnic_dev_hang_reset_done(struct vnic_dev *vdev, int *done)
 590 {
 591         u64 a0 = 0, a1 = 0;
 592         int wait = 1000;
 593         int err;
 594
 595         *done = 0;
 596
 597         err = vnic_dev_cmd(vdev, CMD_HANG_RESET_STATUS, &a0, &a1, wait);
 598         if (err) {
 599                 if (err == ERR_ECMDUNKNOWN)
 600                         return vnic_dev_soft_reset_done(vdev, done);
 601                 return err;
 602         }
 603
 604         *done = (a0 == 0);
 605
 606         return 0;
 607 }
 608
 609 int vnic_dev_hang_notify(struct vnic_dev *vdev)
 610 {
 611         u64 a0, a1;
 612         int wait = 1000;
 613         return vnic_dev_cmd(vdev, CMD_HANG_NOTIFY, &a0, &a1, wait);
 614 }
 615
 616 int vnic_dev_mac_addr(struct vnic_dev *vdev, u8 *mac_addr)
 617 {
 618         u64 a0, a1;
 619         int wait = 1000;
 620         int err, i;
 621
 622         for (i = 0; i < ETH_ALEN; i++)
 623                 mac_addr[i] = 0;
 624
 625         err = vnic_dev_cmd(vdev, CMD_MAC_ADDR, &a0, &a1, wait);
 626         if (err)
 627                 return err;
 628
 629         for (i = 0; i < ETH_ALEN; i++)
 630                 mac_addr[i] = ((u8 *)&a0)[i];
 631
 632         return 0;
 633 }
 634
 635 int vnic_dev_packet_filter(struct vnic_dev *vdev, int directed, int multicast,
 636         int broadcast, int promisc, int allmulti)
 637 {
 638         u64 a0, a1 = 0;
 639         int wait = 1000;
 640         int err;
 641
 642         a0 = (directed ? CMD_PFILTER_DIRECTED : 0) |
 643              (multicast ? CMD_PFILTER_MULTICAST : 0) |
 644              (broadcast ? CMD_PFILTER_BROADCAST : 0) |
 645              (promisc ? CMD_PFILTER_PROMISCUOUS : 0) |
 646              (allmulti ? CMD_PFILTER_ALL_MULTICAST : 0);
 647
 648         err = vnic_dev_cmd(vdev, CMD_PACKET_FILTER, &a0, &a1, wait);
 649         if (err)
 650                 pr_err("Can't set packet filter\n");
 651
 652         return err;
 653 }
 654
 655 int vnic_dev_add_addr(struct vnic_dev *vdev, u8 *addr)
 656 {
 657         u64 a0 = 0, a1 = 0;
 658         int wait = 1000;
 659         int err;
 660         int i;
 661
 662         for (i = 0; i < ETH_ALEN; i++)
 663                 ((u8 *)&a0)[i] = addr[i];
 664
 665         err = vnic_dev_cmd(vdev, CMD_ADDR_ADD, &a0, &a1, wait);
 666         if (err)
 667                 pr_err("Can't add addr [%pM], %d\n", addr, err);
 668
 669         return err;
 670 }
 671
 672 int vnic_dev_del_addr(struct vnic_dev *vdev, u8 *addr)
 673 {
 674         u64 a0 = 0, a1 = 0;
 675         int wait = 1000;
 676         int err;
 677         int i;
 678
 679         for (i = 0; i < ETH_ALEN; i++)
 680                 ((u8 *)&a0)[i] = addr[i];
 681
 682         err = vnic_dev_cmd(vdev, CMD_ADDR_DEL, &a0, &a1, wait);
 683         if (err)
 684                 pr_err("Can't del addr [%pM], %d\n", addr, err);
 685
 686         return err;
 687 }
 688
 689 int vnic_dev_set_ig_vlan_rewrite_mode(struct vnic_dev *vdev,
 690         u8 ig_vlan_rewrite_mode)
 691 {
 692         u64 a0 = ig_vlan_rewrite_mode, a1 = 0;
 693         int wait = 1000;
 694         int err;
 695
 696         err = vnic_dev_cmd(vdev, CMD_IG_VLAN_REWRITE_MODE, &a0, &a1, wait);
 697         if (err == ERR_ECMDUNKNOWN)
 698                 return 0;
 699
 700         return err;
 701 }
 702
 703 static int vnic_dev_notify_setcmd(struct vnic_dev *vdev,
 704         void *notify_addr, dma_addr_t notify_pa, u16 intr)
 705 {
 706         u64 a0, a1;
 707         int wait = 1000;
 708         int r;
 709
 710         memset(notify_addr, 0, sizeof(struct vnic_devcmd_notify));
 711         vdev->notify = notify_addr;
 712         vdev->notify_pa = notify_pa;
 713
 714         a0 = (u64)notify_pa;
 715         a1 = ((u64)intr << 32) & 0x0000ffff00000000ULL;
 716         a1 += sizeof(struct vnic_devcmd_notify);
 717
 718         r = vnic_dev_cmd(vdev, CMD_NOTIFY, &a0, &a1, wait);
 719         vdev->notify_sz = (r == 0) ? (u32)a1 : 0;
 720         return r;
 721 }
 722
 723 int vnic_dev_notify_set(struct vnic_dev *vdev, u16 intr)
 724 {
 725         void *notify_addr;
 726         dma_addr_t notify_pa;
 727
 728         if (vdev->notify || vdev->notify_pa) {
 729                 pr_err("notify block %p still allocated", vdev->notify);
 730                 return -EINVAL;
 731         }
 732
 733         notify_addr = pci_alloc_consistent(vdev->pdev,
 734                         sizeof(struct vnic_devcmd_notify),
 735                         &notify_pa);
 736         if (!notify_addr)
 737                 return -ENOMEM;
 738
 739         return vnic_dev_notify_setcmd(vdev, notify_addr, notify_pa, intr);
 740 }
 741
 742 static int vnic_dev_notify_unsetcmd(struct vnic_dev *vdev)
 743 {
 744         u64 a0, a1;
 745         int wait = 1000;
 746         int err;
 747
 748         a0 = 0;  /* paddr = 0 to unset notify buffer */
 749         a1 = 0x0000ffff00000000ULL; /* intr num = -1 to unreg for intr */
 750         a1 += sizeof(struct vnic_devcmd_notify);
 751
 752         err = vnic_dev_cmd(vdev, CMD_NOTIFY, &a0, &a1, wait);
 753         vdev->notify = NULL;
 754         vdev->notify_pa = 0;
 755         vdev->notify_sz = 0;
 756
 757         return err;
 758 }
 759
 760 int vnic_dev_notify_unset(struct vnic_dev *vdev)
 761 {
 762         if (vdev->notify) {
 763                 pci_free_consistent(vdev->pdev,
 764                         sizeof(struct vnic_devcmd_notify),
 765                         vdev->notify,
 766                         vdev->notify_pa);
 767         }
 768
 769         return vnic_dev_notify_unsetcmd(vdev);
 770 }
 771
 772 static int vnic_dev_notify_ready(struct vnic_dev *vdev)
 773 {
 774         u32 *words;
 775         unsigned int nwords = vdev->notify_sz / 4;
 776         unsigned int i;
 777         u32 csum;
 778
 779         if (!vdev->notify || !vdev->notify_sz)
 780                 return 0;
 781
 782         do {
 783                 csum = 0;
 784                 memcpy(&vdev->notify_copy, vdev->notify, vdev->notify_sz);
 785                 words = (u32 *)&vdev->notify_copy;
 786                 for (i = 1; i < nwords; i++)
 787                         csum += words[i];
 788         } while (csum != words[0]);
 789
 790         return 1;
 791 }
 792
 793 int vnic_dev_init(struct vnic_dev *vdev, int arg)
 794 {
 795         u64 a0 = (u32)arg, a1 = 0;
 796         int wait = 1000;
 797         int r = 0;
 798
 799         if (vnic_dev_capable(vdev, CMD_INIT))
 800                 r = vnic_dev_cmd(vdev, CMD_INIT, &a0, &a1, wait);
 801         else {
 802                 vnic_dev_cmd(vdev, CMD_INIT_v1, &a0, &a1, wait);
 803                 if (a0 & CMD_INITF_DEFAULT_MAC) {
 804                         /* Emulate these for old CMD_INIT_v1 which
 805                          * didn't pass a0 so no CMD_INITF_*.
 806                          */
 807                         vnic_dev_cmd(vdev, CMD_MAC_ADDR, &a0, &a1, wait);
 808                         vnic_dev_cmd(vdev, CMD_ADDR_ADD, &a0, &a1, wait);
 809                 }
 810         }
 811         return r;
 812 }
 813
 814 int vnic_dev_deinit(struct vnic_dev *vdev)
 815 {
 816         u64 a0 = 0, a1 = 0;
 817         int wait = 1000;
 818
 819         return vnic_dev_cmd(vdev, CMD_DEINIT, &a0, &a1, wait);
 820 }
 821
 822 void vnic_dev_intr_coal_timer_info_default(struct vnic_dev *vdev)
 823 {
 824         /* Default: hardware intr coal timer is in units of 1.5 usecs */
 825         vdev->intr_coal_timer_info.mul = 2;
 826         vdev->intr_coal_timer_info.div = 3;
 827         vdev->intr_coal_timer_info.max_usec =
 828                 vnic_dev_intr_coal_timer_hw_to_usec(vdev, 0xffff);
 829 }
 830
 831 int vnic_dev_intr_coal_timer_info(struct vnic_dev *vdev)
 832 {
 833         int wait = 1000;
 834         int err;
 835
 836         memset(vdev->args, 0, sizeof(vdev->args));
 837
 838         err = _vnic_dev_cmd(vdev, CMD_INTR_COAL_CONVERT, wait);
 839
 840         /* Use defaults when firmware doesn't support the devcmd at all or
 841          * supports it for only specific hardware
 842          */
 843         if ((err == ERR_ECMDUNKNOWN) ||
 844                 (!err && !(vdev->args[0] && vdev->args[1] && vdev->args[2]))) {
 845                 pr_warning("Using default conversion factor for "
 846                         "interrupt coalesce timer\n");
 847                 vnic_dev_intr_coal_timer_info_default(vdev);
 848                 return 0;
 849         }
 850
 851         vdev->intr_coal_timer_info.mul = (u32) vdev->args[0];
 852         vdev->intr_coal_timer_info.div = (u32) vdev->args[1];
 853         vdev->intr_coal_timer_info.max_usec = (u32) vdev->args[2];
 854
 855         return err;
 856 }
 857
 858 int vnic_dev_link_status(struct vnic_dev *vdev)
 859 {
 860         if (!vnic_dev_notify_ready(vdev))
 861                 return 0;
 862
 863         return vdev->notify_copy.link_state;
 864 }
 865
 866 u32 vnic_dev_port_speed(struct vnic_dev *vdev)
 867 {
 868         if (!vnic_dev_notify_ready(vdev))
 869                 return 0;
 870
 871         return vdev->notify_copy.port_speed;
 872 }
 873
 874 u32 vnic_dev_msg_lvl(struct vnic_dev *vdev)
 875 {
 876         if (!vnic_dev_notify_ready(vdev))
 877                 return 0;
 878
 879         return vdev->notify_copy.msglvl;
 880 }
 881
 882 u32 vnic_dev_mtu(struct vnic_dev *vdev)
 883 {
 884         if (!vnic_dev_notify_ready(vdev))
 885                 return 0;
 886
 887         return vdev->notify_copy.mtu;
 888 }
 889
 890 void vnic_dev_set_intr_mode(struct vnic_dev *vdev,
 891         enum vnic_dev_intr_mode intr_mode)
 892 {
 893         vdev->intr_mode = intr_mode;
 894 }
 895
 896 enum vnic_dev_intr_mode vnic_dev_get_intr_mode(
 897         struct vnic_dev *vdev)
 898 {
 899         return vdev->intr_mode;
 900 }
 901
 902 u32 vnic_dev_intr_coal_timer_usec_to_hw(struct vnic_dev *vdev, u32 usec)
 903 {
 904         return (usec * vdev->intr_coal_timer_info.mul) /
 905                 vdev->intr_coal_timer_info.div;
 906 }
 907
 908 u32 vnic_dev_intr_coal_timer_hw_to_usec(struct vnic_dev *vdev, u32 hw_cycles)
 909 {
 910         return (hw_cycles * vdev->intr_coal_timer_info.div) /
 911                 vdev->intr_coal_timer_info.mul;
 912 }
 913
 914 u32 vnic_dev_get_intr_coal_timer_max(struct vnic_dev *vdev)
 915 {
 916         return vdev->intr_coal_timer_info.max_usec;
 917 }
 918
 919 void vnic_dev_unregister(struct vnic_dev *vdev)
 920 {
 921         if (vdev) {
 922                 if (vdev->notify)
 923                         pci_free_consistent(vdev->pdev,
 924                                 sizeof(struct vnic_devcmd_notify),
 925                                 vdev->notify,
 926                                 vdev->notify_pa);
 927                 if (vdev->stats)
 928                         pci_free_consistent(vdev->pdev,
 929                                 sizeof(struct vnic_stats),
 930                                 vdev->stats, vdev->stats_pa);
 931                 if (vdev->fw_info)
 932                         pci_free_consistent(vdev->pdev,
 933                                 sizeof(struct vnic_devcmd_fw_info),
 934                                 vdev->fw_info, vdev->fw_info_pa);
 935                 kfree(vdev);
 936         }
 937 }
 938
 939 struct vnic_dev *vnic_dev_register(struct vnic_dev *vdev,
 940         void *priv, struct pci_dev *pdev, struct vnic_dev_bar *bar,
 941         unsigned int num_bars)
 942 {
 943         if (!vdev) {
 944                 vdev = kzalloc(sizeof(struct vnic_dev), GFP_ATOMIC);
 945                 if (!vdev)
 946                         return NULL;
 947         }
 948
 949         vdev->priv = priv;
 950         vdev->pdev = pdev;
 951
 952         if (vnic_dev_discover_res(vdev, bar, num_bars))
 953                 goto err_out;
 954
 955         vdev->devcmd = vnic_dev_get_res(vdev, RES_TYPE_DEVCMD, 0);
 956         if (!vdev->devcmd)
 957                 goto err_out;
 958
 959         return vdev;
 960
 961 err_out:
 962         vnic_dev_unregister(vdev);
 963         return NULL;
 964 }
 965
 966 int vnic_dev_init_prov2(struct vnic_dev *vdev, u8 *buf, u32 len)
 967 {
 968         u64 a0, a1 = len;
 969         int wait = 1000;
 970         dma_addr_t prov_pa;
 971         void *prov_buf;
 972         int ret;
 973
 974         prov_buf = pci_alloc_consistent(vdev->pdev, len, &prov_pa);
 975         if (!prov_buf)
 976                 return -ENOMEM;
 977
 978         memcpy(prov_buf, buf, len);
 979
 980         a0 = prov_pa;
 981
 982         ret = vnic_dev_cmd(vdev, CMD_INIT_PROV_INFO2, &a0, &a1, wait);
 983
 984         pci_free_consistent(vdev->pdev, len, prov_buf, prov_pa);
 985
 986         return ret;
 987 }
 988
 989 int vnic_dev_enable2(struct vnic_dev *vdev, int active)
 990 {
 991         u64 a0, a1 = 0;
 992         int wait = 1000;
 993
 994         a0 = (active ? CMD_ENABLE2_ACTIVE : 0);
 995
 996         return vnic_dev_cmd(vdev, CMD_ENABLE2, &a0, &a1, wait);
 997 }
 998
 999 static int vnic_dev_cmd_status(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd,
1000         int *status)
1001 {
1002         u64 a0 = cmd, a1 = 0;
1003         int wait = 1000;
1004         int ret;
1005
1006         ret = vnic_dev_cmd(vdev, CMD_STATUS, &a0, &a1, wait);
1007         if (!ret)
1008                 *status = (int)a0;
1009
1010         return ret;
1011 }
1012
1013 int vnic_dev_enable2_done(struct vnic_dev *vdev, int *status)
1014 {
1015         return vnic_dev_cmd_status(vdev, CMD_ENABLE2, status);
1016 }
1017
1018 int vnic_dev_deinit_done(struct vnic_dev *vdev, int *status)
1019 {
1020         return vnic_dev_cmd_status(vdev, CMD_DEINIT, status);
1021 }