drivers/net/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 };
  36
  37 struct vnic_res {
  38         void __iomem *vaddr;
  39         dma_addr_t bus_addr;
  40         unsigned int count;
  41 };
  42
  43 struct vnic_dev {
  44         void *priv;
  45         struct pci_dev *pdev;
  46         struct vnic_res res[RES_TYPE_MAX];
  47         enum vnic_dev_intr_mode intr_mode;
  48         struct vnic_devcmd __iomem *devcmd;
  49         struct vnic_devcmd_notify *notify;
  50         struct vnic_devcmd_notify notify_copy;
  51         dma_addr_t notify_pa;
  52         u32 notify_sz;
  53         dma_addr_t linkstatus_pa;
  54         struct vnic_stats *stats;
  55         dma_addr_t stats_pa;
  56         struct vnic_devcmd_fw_info *fw_info;
  57         dma_addr_t fw_info_pa;
  58         enum vnic_proxy_type proxy;
  59         u32 proxy_index;
  60         u64 args[VNIC_DEVCMD_NARGS];
  61 };
  62
  63 #define VNIC_MAX_RES_HDR_SIZE \
  64         (sizeof(struct vnic_resource_header) + \
  65         sizeof(struct vnic_resource) * RES_TYPE_MAX)
  66 #define VNIC_RES_STRIDE 128
  67
  68 void *vnic_dev_priv(struct vnic_dev *vdev)
  69 {
  70         return vdev->priv;
  71 }
  72
  73 static int vnic_dev_discover_res(struct vnic_dev *vdev,
  74         struct vnic_dev_bar *bar, unsigned int num_bars)
  75 {
  76         struct vnic_resource_header __iomem *rh;
  77         struct mgmt_barmap_hdr __iomem *mrh;
  78         struct vnic_resource __iomem *r;
  79         u8 type;
  80
  81         if (num_bars == 0)
  82                 return -EINVAL;
  83
  84         if (bar->len < VNIC_MAX_RES_HDR_SIZE) {
  85                 pr_err("vNIC BAR0 res hdr length error\n");
  86                 return -EINVAL;
  87         }
  88
  89         rh  = bar->vaddr;
  90         mrh = bar->vaddr;
  91         if (!rh) {
  92                 pr_err("vNIC BAR0 res hdr not mem-mapped\n");
  93                 return -EINVAL;
  94         }
  95
  96         /* Check for mgmt vnic in addition to normal vnic */
  97         if ((ioread32(&rh->magic) != VNIC_RES_MAGIC) ||
  98                 (ioread32(&rh->version) != VNIC_RES_VERSION)) {
  99                 if ((ioread32(&mrh->magic) != MGMTVNIC_MAGIC) ||
 100                         (ioread32(&mrh->version) != MGMTVNIC_VERSION)) {
 101                         pr_err("vNIC BAR0 res magic/version error "
 102                         "exp (%lx/%lx) or (%lx/%lx), curr (%x/%x)\n",
 103                         VNIC_RES_MAGIC, VNIC_RES_VERSION,
 104                         MGMTVNIC_MAGIC, MGMTVNIC_VERSION,
 105                         ioread32(&rh->magic), ioread32(&rh->version));
 106                         return -EINVAL;
 107                 }
 108         }
 109
 110         if (ioread32(&mrh->magic) == MGMTVNIC_MAGIC)
 111                 r = (struct vnic_resource __iomem *)(mrh + 1);
 112         else
 113                 r = (struct vnic_resource __iomem *)(rh + 1);
 114
 115
 116         while ((type = ioread8(&r->type)) != RES_TYPE_EOL) {
 117
 118                 u8 bar_num = ioread8(&r->bar);
 119                 u32 bar_offset = ioread32(&r->bar_offset);
 120                 u32 count = ioread32(&r->count);
 121                 u32 len;
 122
 123                 r++;
 124
 125                 if (bar_num >= num_bars)
 126                         continue;
 127
 128                 if (!bar[bar_num].len || !bar[bar_num].vaddr)
 129                         continue;
 130
 131                 switch (type) {
 132                 case RES_TYPE_WQ:
 133                 case RES_TYPE_RQ:
 134                 case RES_TYPE_CQ:
 135                 case RES_TYPE_INTR_CTRL:
 136                         /* each count is stride bytes long */
 137                         len = count * VNIC_RES_STRIDE;
 138                         if (len + bar_offset > bar[bar_num].len) {
 139                                 pr_err("vNIC BAR0 resource %d "
 140                                         "out-of-bounds, offset 0x%x + "
 141                                         "size 0x%x > bar len 0x%lx\n",
 142                                         type, bar_offset,
 143                                         len,
 144                                         bar[bar_num].len);
 145                                 return -EINVAL;
 146                         }
 147                         break;
 148                 case RES_TYPE_INTR_PBA_LEGACY:
 149                 case RES_TYPE_DEVCMD:
 150                         len = count;
 151                         break;
 152                 default:
 153                         continue;
 154                 }
 155
 156                 vdev->res[type].count = count;
 157                 vdev->res[type].vaddr = (char __iomem *)bar[bar_num].vaddr +
 158                         bar_offset;
 159                 vdev->res[type].bus_addr = bar[bar_num].bus_addr + bar_offset;
 160         }
 161
 162         return 0;
 163 }
 164
 165 unsigned int vnic_dev_get_res_count(struct vnic_dev *vdev,
 166         enum vnic_res_type type)
 167 {
 168         return vdev->res[type].count;
 169 }
 170
 171 void __iomem *vnic_dev_get_res(struct vnic_dev *vdev, enum vnic_res_type type,
 172         unsigned int index)
 173 {
 174         if (!vdev->res[type].vaddr)
 175                 return NULL;
 176
 177         switch (type) {
 178         case RES_TYPE_WQ:
 179         case RES_TYPE_RQ:
 180         case RES_TYPE_CQ:
 181         case RES_TYPE_INTR_CTRL:
 182                 return (char __iomem *)vdev->res[type].vaddr +
 183                         index * VNIC_RES_STRIDE;
 184         default:
 185                 return (char __iomem *)vdev->res[type].vaddr;
 186         }
 187 }
 188
 189 static unsigned int vnic_dev_desc_ring_size(struct vnic_dev_ring *ring,
 190         unsigned int desc_count, unsigned int desc_size)
 191 {
 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.
 196          */
 197
 198         unsigned int count_align = 32;
 199         unsigned int desc_align = 16;
 200
 201         ring->base_align = 512;
 202
 203         if (desc_count == 0)
 204                 desc_count = 4096;
 205
 206         ring->desc_count = ALIGN(desc_count, count_align);
 207
 208         ring->desc_size = ALIGN(desc_size, desc_align);
 209
 210         ring->size = ring->desc_count * ring->desc_size;
 211         ring->size_unaligned = ring->size + ring->base_align;
 212
 213         return ring->size_unaligned;
 214 }
 215
 216 void vnic_dev_clear_desc_ring(struct vnic_dev_ring *ring)
 217 {
 218         memset(ring->descs, 0, ring->size);
 219 }
 220
 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)
 223 {
 224         vnic_dev_desc_ring_size(ring, desc_count, desc_size);
 225
 226         ring->descs_unaligned = pci_alloc_consistent(vdev->pdev,
 227                 ring->size_unaligned,
 228                 &ring->base_addr_unaligned);
 229
 230         if (!ring->descs_unaligned) {
 231                 pr_err("Failed to allocate ring (size=%d), aborting\n",
 232                         (int)ring->size);
 233                 return -ENOMEM;
 234         }
 235
 236         ring->base_addr = ALIGN(ring->base_addr_unaligned,
 237                 ring->base_align);
 238         ring->descs = (u8 *)ring->descs_unaligned +
 239                 (ring->base_addr - ring->base_addr_unaligned);
 240
 241         vnic_dev_clear_desc_ring(ring);
 242
 243         ring->desc_avail = ring->desc_count - 1;
 244
 245         return 0;
 246 }
 247
 248 void vnic_dev_free_desc_ring(struct vnic_dev *vdev, struct vnic_dev_ring *ring)
 249 {
 250         if (ring->descs) {
 251                 pci_free_consistent(vdev->pdev,
 252                         ring->size_unaligned,
 253                         ring->descs_unaligned,
 254                         ring->base_addr_unaligned);
 255                 ring->descs = NULL;
 256         }
 257 }
 258
 259 static int _vnic_dev_cmd(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd,
 260         int wait)
 261 {
 262         struct vnic_devcmd __iomem *devcmd = vdev->devcmd;
 263         unsigned int i;
 264         int delay;
 265         u32 status;
 266         int err;
 267
 268         status = ioread32(&devcmd->status);
 269         if (status == 0xFFFFFFFF) {
 270                 /* PCI-e target device is gone */
 271                 return -ENODEV;
 272         }
 273         if (status & STAT_BUSY) {
 274                 pr_err("Busy devcmd %d\n", _CMD_N(cmd));
 275                 return -EBUSY;
 276         }
 277
 278         if (_CMD_DIR(cmd) & _CMD_DIR_WRITE) {
 279                 for (i = 0; i < VNIC_DEVCMD_NARGS; i++)
 280                         writeq(vdev->args[i], &devcmd->args[i]);
 281                 wmb();
 282         }
 283
 284         iowrite32(cmd, &devcmd->cmd);
 285
 286         if ((_CMD_FLAGS(cmd) & _CMD_FLAGS_NOWAIT))
 287                 return 0;
 288
 289         for (delay = 0; delay < wait; delay++) {
 290
 291                 udelay(100);
 292
 293                 status = ioread32(&devcmd->status);
 294                 if (status == 0xFFFFFFFF) {
 295                         /* PCI-e target device is gone */
 296                         return -ENODEV;
 297                 }
 298
 299                 if (!(status & STAT_BUSY)) {
 300
 301                         if (status & STAT_ERROR) {
 302                                 err = (int)readq(&devcmd->args[0]);
 303                                 if (err != ERR_ECMDUNKNOWN ||
 304                                     cmd != CMD_CAPABILITY)
 305                                         pr_err("Error %d devcmd %d\n",
 306                                                 err, _CMD_N(cmd));
 307                                 return err;
 308                         }
 309
 310                         if (_CMD_DIR(cmd) & _CMD_DIR_READ) {
 311                                 rmb();
 312                                 for (i = 0; i < VNIC_DEVCMD_NARGS; i++)
 313                                         vdev->args[i] = readq(&devcmd->args[i]);
 314                         }
 315
 316                         return 0;
 317                 }
 318         }
 319
 320         pr_err("Timedout devcmd %d\n", _CMD_N(cmd));
 321         return -ETIMEDOUT;
 322 }
 323
 324 static int vnic_dev_cmd_proxy_by_bdf(struct vnic_dev *vdev,
 325         enum vnic_devcmd_cmd cmd, u64 *a0, u64 *a1, int wait)
 326 {
 327         u32 status;
 328         int err;
 329
 330         memset(vdev->args, 0, sizeof(vdev->args));
 331
 332         vdev->args[0] = vdev->proxy_index; /* bdf */
 333         vdev->args[1] = cmd;
 334         vdev->args[2] = *a0;
 335         vdev->args[3] = *a1;
 336
 337         err = _vnic_dev_cmd(vdev, CMD_PROXY_BY_BDF, wait);
 338         if (err)
 339                 return err;
 340
 341         status = (u32)vdev->args[0];
 342         if (status & STAT_ERROR) {
 343                 err = (int)vdev->args[1];
 344                 if (err != ERR_ECMDUNKNOWN ||
 345                     cmd != CMD_CAPABILITY)
 346                         pr_err("Error %d proxy devcmd %d\n", err, _CMD_N(cmd));
 347                 return err;
 348         }
 349
 350         *a0 = vdev->args[1];
 351         *a1 = vdev->args[2];
 352
 353         return 0;
 354 }
 355
 356 static int vnic_dev_cmd_no_proxy(struct vnic_dev *vdev,
 357         enum vnic_devcmd_cmd cmd, u64 *a0, u64 *a1, int wait)
 358 {
 359         int err;
 360
 361         vdev->args[0] = *a0;
 362         vdev->args[1] = *a1;
 363
 364         err = _vnic_dev_cmd(vdev, cmd, wait);
 365
 366         *a0 = vdev->args[0];
 367         *a1 = vdev->args[1];
 368
 369         return err;
 370 }
 371
 372 int vnic_dev_cmd(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd,
 373         u64 *a0, u64 *a1, int wait)
 374 {
 375         memset(vdev->args, 0, sizeof(vdev->args));
 376
 377         switch (vdev->proxy) {
 378         case PROXY_BY_BDF:
 379                 return vnic_dev_cmd_proxy_by_bdf(vdev, cmd, a0, a1, wait);
 380         case PROXY_NONE:
 381         default:
 382                 return vnic_dev_cmd_no_proxy(vdev, cmd, a0, a1, wait);
 383         }
 384 }
 385
 386 static int vnic_dev_capable(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd)
 387 {
 388         u64 a0 = (u32)cmd, a1 = 0;
 389         int wait = 1000;
 390         int err;
 391
 392         err = vnic_dev_cmd(vdev, CMD_CAPABILITY, &a0, &a1, wait);
 393
 394         return !(err || a0);
 395 }
 396
 397 int vnic_dev_fw_info(struct vnic_dev *vdev,
 398         struct vnic_devcmd_fw_info **fw_info)
 399 {
 400         u64 a0, a1 = 0;
 401         int wait = 1000;
 402         int err = 0;
 403
 404         if (!vdev->fw_info) {
 405                 vdev->fw_info = pci_alloc_consistent(vdev->pdev,
 406                         sizeof(struct vnic_devcmd_fw_info),
 407                         &vdev->fw_info_pa);
 408                 if (!vdev->fw_info)
 409                         return -ENOMEM;
 410
 411                 a0 = vdev->fw_info_pa;
 412
 413                 /* only get fw_info once and cache it */
 414                 err = vnic_dev_cmd(vdev, CMD_MCPU_FW_INFO, &a0, &a1, wait);
 415         }
 416
 417         *fw_info = vdev->fw_info;
 418
 419         return err;
 420 }
 421
 422 int vnic_dev_hw_version(struct vnic_dev *vdev, enum vnic_dev_hw_version *hw_ver)
 423 {
 424         struct vnic_devcmd_fw_info *fw_info;
 425         int err;
 426
 427         err = vnic_dev_fw_info(vdev, &fw_info);
 428         if (err)
 429                 return err;
 430
 431         if (strncmp(fw_info->hw_version, "A1", sizeof("A1")) == 0)
 432                 *hw_ver = VNIC_DEV_HW_VER_A1;
 433         else if (strncmp(fw_info->hw_version, "A2", sizeof("A2")) == 0)
 434                 *hw_ver = VNIC_DEV_HW_VER_A2;
 435         else
 436                 *hw_ver = VNIC_DEV_HW_VER_UNKNOWN;
 437
 438         return 0;
 439 }
 440
 441 int vnic_dev_spec(struct vnic_dev *vdev, unsigned int offset, unsigned int size,
 442         void *value)
 443 {
 444         u64 a0, a1;
 445         int wait = 1000;
 446         int err;
 447
 448         a0 = offset;
 449         a1 = size;
 450
 451         err = vnic_dev_cmd(vdev, CMD_DEV_SPEC, &a0, &a1, wait);
 452
 453         switch (size) {
 454         case 1: *(u8 *)value = (u8)a0; break;
 455         case 2: *(u16 *)value = (u16)a0; break;
 456         case 4: *(u32 *)value = (u32)a0; break;
 457         case 8: *(u64 *)value = a0; break;
 458         default: BUG(); break;
 459         }
 460
 461         return err;
 462 }
 463
 464 int vnic_dev_stats_dump(struct vnic_dev *vdev, struct vnic_stats **stats)
 465 {
 466         u64 a0, a1;
 467         int wait = 1000;
 468
 469         if (!vdev->stats) {
 470                 vdev->stats = pci_alloc_consistent(vdev->pdev,
 471                         sizeof(struct vnic_stats), &vdev->stats_pa);
 472                 if (!vdev->stats)
 473                         return -ENOMEM;
 474         }
 475
 476         *stats = vdev->stats;
 477         a0 = vdev->stats_pa;
 478         a1 = sizeof(struct vnic_stats);
 479
 480         return vnic_dev_cmd(vdev, CMD_STATS_DUMP, &a0, &a1, wait);
 481 }
 482
 483 int vnic_dev_close(struct vnic_dev *vdev)
 484 {
 485         u64 a0 = 0, a1 = 0;
 486         int wait = 1000;
 487         return vnic_dev_cmd(vdev, CMD_CLOSE, &a0, &a1, wait);
 488 }
 489
 490 int vnic_dev_enable_wait(struct vnic_dev *vdev)
 491 {
 492         u64 a0 = 0, a1 = 0;
 493         int wait = 1000;
 494         int err;
 495
 496         err = vnic_dev_cmd(vdev, CMD_ENABLE_WAIT, &a0, &a1, wait);
 497         if (err == ERR_ECMDUNKNOWN)
 498                 return vnic_dev_cmd(vdev, CMD_ENABLE, &a0, &a1, wait);
 499
 500         return err;
 501 }
 502
 503 int vnic_dev_disable(struct vnic_dev *vdev)
 504 {
 505         u64 a0 = 0, a1 = 0;
 506         int wait = 1000;
 507         return vnic_dev_cmd(vdev, CMD_DISABLE, &a0, &a1, wait);
 508 }
 509
 510 int vnic_dev_open(struct vnic_dev *vdev, int arg)
 511 {
 512         u64 a0 = (u32)arg, a1 = 0;
 513         int wait = 1000;
 514         return vnic_dev_cmd(vdev, CMD_OPEN, &a0, &a1, wait);
 515 }
 516
 517 int vnic_dev_open_done(struct vnic_dev *vdev, int *done)
 518 {
 519         u64 a0 = 0, a1 = 0;
 520         int wait = 1000;
 521         int err;
 522
 523         *done = 0;
 524
 525         err = vnic_dev_cmd(vdev, CMD_OPEN_STATUS, &a0, &a1, wait);
 526         if (err)
 527                 return err;
 528
 529         *done = (a0 == 0);
 530
 531         return 0;
 532 }
 533
 534 static int vnic_dev_soft_reset(struct vnic_dev *vdev, int arg)
 535 {
 536         u64 a0 = (u32)arg, a1 = 0;
 537         int wait = 1000;
 538         return vnic_dev_cmd(vdev, CMD_SOFT_RESET, &a0, &a1, wait);
 539 }
 540
 541 static int vnic_dev_soft_reset_done(struct vnic_dev *vdev, int *done)
 542 {
 543         u64 a0 = 0, a1 = 0;
 544         int wait = 1000;
 545         int err;
 546
 547         *done = 0;
 548
 549         err = vnic_dev_cmd(vdev, CMD_SOFT_RESET_STATUS, &a0, &a1, wait);
 550         if (err)
 551                 return err;
 552
 553         *done = (a0 == 0);
 554
 555         return 0;
 556 }
 557
 558 int vnic_dev_hang_reset(struct vnic_dev *vdev, int arg)
 559 {
 560         u64 a0 = (u32)arg, a1 = 0;
 561         int wait = 1000;
 562         int err;
 563
 564         err = vnic_dev_cmd(vdev, CMD_HANG_RESET, &a0, &a1, wait);
 565         if (err == ERR_ECMDUNKNOWN) {
 566                 err = vnic_dev_soft_reset(vdev, arg);
 567                 if (err)
 568                         return err;
 569
 570                 return vnic_dev_init(vdev, 0);
 571         }
 572
 573         return err;
 574 }
 575
 576 int vnic_dev_hang_reset_done(struct vnic_dev *vdev, int *done)
 577 {
 578         u64 a0 = 0, a1 = 0;
 579         int wait = 1000;
 580         int err;
 581
 582         *done = 0;
 583
 584         err = vnic_dev_cmd(vdev, CMD_HANG_RESET_STATUS, &a0, &a1, wait);
 585         if (err) {
 586                 if (err == ERR_ECMDUNKNOWN)
 587                         return vnic_dev_soft_reset_done(vdev, done);
 588                 return err;
 589         }
 590
 591         *done = (a0 == 0);
 592
 593         return 0;
 594 }
 595
 596 int vnic_dev_hang_notify(struct vnic_dev *vdev)
 597 {
 598         u64 a0, a1;
 599         int wait = 1000;
 600         return vnic_dev_cmd(vdev, CMD_HANG_NOTIFY, &a0, &a1, wait);
 601 }
 602
 603 int vnic_dev_mac_addr(struct vnic_dev *vdev, u8 *mac_addr)
 604 {
 605         u64 a0, a1;
 606         int wait = 1000;
 607         int err, i;
 608
 609         for (i = 0; i < ETH_ALEN; i++)
 610                 mac_addr[i] = 0;
 611
 612         err = vnic_dev_cmd(vdev, CMD_MAC_ADDR, &a0, &a1, wait);
 613         if (err)
 614                 return err;
 615
 616         for (i = 0; i < ETH_ALEN; i++)
 617                 mac_addr[i] = ((u8 *)&a0)[i];
 618
 619         return 0;
 620 }
 621
 622 int vnic_dev_packet_filter(struct vnic_dev *vdev, int directed, int multicast,
 623         int broadcast, int promisc, int allmulti)
 624 {
 625         u64 a0, a1 = 0;
 626         int wait = 1000;
 627         int err;
 628
 629         a0 = (directed ? CMD_PFILTER_DIRECTED : 0) |
 630              (multicast ? CMD_PFILTER_MULTICAST : 0) |
 631              (broadcast ? CMD_PFILTER_BROADCAST : 0) |
 632              (promisc ? CMD_PFILTER_PROMISCUOUS : 0) |
 633              (allmulti ? CMD_PFILTER_ALL_MULTICAST : 0);
 634
 635         err = vnic_dev_cmd(vdev, CMD_PACKET_FILTER, &a0, &a1, wait);
 636         if (err)
 637                 pr_err("Can't set packet filter\n");
 638
 639         return err;
 640 }
 641
 642 int vnic_dev_add_addr(struct vnic_dev *vdev, u8 *addr)
 643 {
 644         u64 a0 = 0, a1 = 0;
 645         int wait = 1000;
 646         int err;
 647         int i;
 648
 649         for (i = 0; i < ETH_ALEN; i++)
 650                 ((u8 *)&a0)[i] = addr[i];
 651
 652         err = vnic_dev_cmd(vdev, CMD_ADDR_ADD, &a0, &a1, wait);
 653         if (err)
 654                 pr_err("Can't add addr [%pM], %d\n", addr, err);
 655
 656         return err;
 657 }
 658
 659 int vnic_dev_del_addr(struct vnic_dev *vdev, u8 *addr)
 660 {
 661         u64 a0 = 0, a1 = 0;
 662         int wait = 1000;
 663         int err;
 664         int i;
 665
 666         for (i = 0; i < ETH_ALEN; i++)
 667                 ((u8 *)&a0)[i] = addr[i];
 668
 669         err = vnic_dev_cmd(vdev, CMD_ADDR_DEL, &a0, &a1, wait);
 670         if (err)
 671                 pr_err("Can't del addr [%pM], %d\n", addr, err);
 672
 673         return err;
 674 }
 675
 676 int vnic_dev_set_ig_vlan_rewrite_mode(struct vnic_dev *vdev,
 677         u8 ig_vlan_rewrite_mode)
 678 {
 679         u64 a0 = ig_vlan_rewrite_mode, a1 = 0;
 680         int wait = 1000;
 681         int err;
 682
 683         err = vnic_dev_cmd(vdev, CMD_IG_VLAN_REWRITE_MODE, &a0, &a1, wait);
 684         if (err == ERR_ECMDUNKNOWN)
 685                 return 0;
 686
 687         return err;
 688 }
 689
 690 static int vnic_dev_notify_setcmd(struct vnic_dev *vdev,
 691         void *notify_addr, dma_addr_t notify_pa, u16 intr)
 692 {
 693         u64 a0, a1;
 694         int wait = 1000;
 695         int r;
 696
 697         memset(notify_addr, 0, sizeof(struct vnic_devcmd_notify));
 698         vdev->notify = notify_addr;
 699         vdev->notify_pa = notify_pa;
 700
 701         a0 = (u64)notify_pa;
 702         a1 = ((u64)intr << 32) & 0x0000ffff00000000ULL;
 703         a1 += sizeof(struct vnic_devcmd_notify);
 704
 705         r = vnic_dev_cmd(vdev, CMD_NOTIFY, &a0, &a1, wait);
 706         vdev->notify_sz = (r == 0) ? (u32)a1 : 0;
 707         return r;
 708 }
 709
 710 int vnic_dev_notify_set(struct vnic_dev *vdev, u16 intr)
 711 {
 712         void *notify_addr;
 713         dma_addr_t notify_pa;
 714
 715         if (vdev->notify || vdev->notify_pa) {
 716                 pr_err("notify block %p still allocated", vdev->notify);
 717                 return -EINVAL;
 718         }
 719
 720         notify_addr = pci_alloc_consistent(vdev->pdev,
 721                         sizeof(struct vnic_devcmd_notify),
 722                         &notify_pa);
 723         if (!notify_addr)
 724                 return -ENOMEM;
 725
 726         return vnic_dev_notify_setcmd(vdev, notify_addr, notify_pa, intr);
 727 }
 728
 729 static int vnic_dev_notify_unsetcmd(struct vnic_dev *vdev)
 730 {
 731         u64 a0, a1;
 732         int wait = 1000;
 733         int err;
 734
 735         a0 = 0;  /* paddr = 0 to unset notify buffer */
 736         a1 = 0x0000ffff00000000ULL; /* intr num = -1 to unreg for intr */
 737         a1 += sizeof(struct vnic_devcmd_notify);
 738
 739         err = vnic_dev_cmd(vdev, CMD_NOTIFY, &a0, &a1, wait);
 740         vdev->notify = NULL;
 741         vdev->notify_pa = 0;
 742         vdev->notify_sz = 0;
 743
 744         return err;
 745 }
 746
 747 int vnic_dev_notify_unset(struct vnic_dev *vdev)
 748 {
 749         if (vdev->notify) {
 750                 pci_free_consistent(vdev->pdev,
 751                         sizeof(struct vnic_devcmd_notify),
 752                         vdev->notify,
 753                         vdev->notify_pa);
 754         }
 755
 756         return vnic_dev_notify_unsetcmd(vdev);
 757 }
 758
 759 static int vnic_dev_notify_ready(struct vnic_dev *vdev)
 760 {
 761         u32 *words;
 762         unsigned int nwords = vdev->notify_sz / 4;
 763         unsigned int i;
 764         u32 csum;
 765
 766         if (!vdev->notify || !vdev->notify_sz)
 767                 return 0;
 768
 769         do {
 770                 csum = 0;
 771                 memcpy(&vdev->notify_copy, vdev->notify, vdev->notify_sz);
 772                 words = (u32 *)&vdev->notify_copy;
 773                 for (i = 1; i < nwords; i++)
 774                         csum += words[i];
 775         } while (csum != words[0]);
 776
 777         return 1;
 778 }
 779
 780 int vnic_dev_init(struct vnic_dev *vdev, int arg)
 781 {
 782         u64 a0 = (u32)arg, a1 = 0;
 783         int wait = 1000;
 784         int r = 0;
 785
 786         if (vnic_dev_capable(vdev, CMD_INIT))
 787                 r = vnic_dev_cmd(vdev, CMD_INIT, &a0, &a1, wait);
 788         else {
 789                 vnic_dev_cmd(vdev, CMD_INIT_v1, &a0, &a1, wait);
 790                 if (a0 & CMD_INITF_DEFAULT_MAC) {
 791                         /* Emulate these for old CMD_INIT_v1 which
 792                          * didn't pass a0 so no CMD_INITF_*.
 793                          */
 794                         vnic_dev_cmd(vdev, CMD_MAC_ADDR, &a0, &a1, wait);
 795                         vnic_dev_cmd(vdev, CMD_ADDR_ADD, &a0, &a1, wait);
 796                 }
 797         }
 798         return r;
 799 }
 800
 801 int vnic_dev_init_done(struct vnic_dev *vdev, int *done, int *err)
 802 {
 803         u64 a0 = 0, a1 = 0;
 804         int wait = 1000;
 805         int ret;
 806
 807         *done = 0;
 808
 809         ret = vnic_dev_cmd(vdev, CMD_INIT_STATUS, &a0, &a1, wait);
 810         if (ret)
 811                 return ret;
 812
 813         *done = (a0 == 0);
 814
 815         *err = (a0 == 0) ? (int)a1:0;
 816
 817         return 0;
 818 }
 819
 820 int vnic_dev_init_prov(struct vnic_dev *vdev, u8 *buf, u32 len)
 821 {
 822         u64 a0, a1 = len;
 823         int wait = 1000;
 824         dma_addr_t prov_pa;
 825         void *prov_buf;
 826         int ret;
 827
 828         prov_buf = pci_alloc_consistent(vdev->pdev, len, &prov_pa);
 829         if (!prov_buf)
 830                 return -ENOMEM;
 831
 832         memcpy(prov_buf, buf, len);
 833
 834         a0 = prov_pa;
 835
 836         ret = vnic_dev_cmd(vdev, CMD_INIT_PROV_INFO, &a0, &a1, wait);
 837
 838         pci_free_consistent(vdev->pdev, len, prov_buf, prov_pa);
 839
 840         return ret;
 841 }
 842
 843 int vnic_dev_deinit(struct vnic_dev *vdev)
 844 {
 845         u64 a0 = 0, a1 = 0;
 846         int wait = 1000;
 847
 848         return vnic_dev_cmd(vdev, CMD_DEINIT, &a0, &a1, wait);
 849 }
 850
 851 int vnic_dev_link_status(struct vnic_dev *vdev)
 852 {
 853         if (!vnic_dev_notify_ready(vdev))
 854                 return 0;
 855
 856         return vdev->notify_copy.link_state;
 857 }
 858
 859 u32 vnic_dev_port_speed(struct vnic_dev *vdev)
 860 {
 861         if (!vnic_dev_notify_ready(vdev))
 862                 return 0;
 863
 864         return vdev->notify_copy.port_speed;
 865 }
 866
 867 u32 vnic_dev_msg_lvl(struct vnic_dev *vdev)
 868 {
 869         if (!vnic_dev_notify_ready(vdev))
 870                 return 0;
 871
 872         return vdev->notify_copy.msglvl;
 873 }
 874
 875 u32 vnic_dev_mtu(struct vnic_dev *vdev)
 876 {
 877         if (!vnic_dev_notify_ready(vdev))
 878                 return 0;
 879
 880         return vdev->notify_copy.mtu;
 881 }
 882
 883 void vnic_dev_set_intr_mode(struct vnic_dev *vdev,
 884         enum vnic_dev_intr_mode intr_mode)
 885 {
 886         vdev->intr_mode = intr_mode;
 887 }
 888
 889 enum vnic_dev_intr_mode vnic_dev_get_intr_mode(
 890         struct vnic_dev *vdev)
 891 {
 892         return vdev->intr_mode;
 893 }
 894
 895 void vnic_dev_unregister(struct vnic_dev *vdev)
 896 {
 897         if (vdev) {
 898                 if (vdev->notify)
 899                         pci_free_consistent(vdev->pdev,
 900                                 sizeof(struct vnic_devcmd_notify),
 901                                 vdev->notify,
 902                                 vdev->notify_pa);
 903                 if (vdev->stats)
 904                         pci_free_consistent(vdev->pdev,
 905                                 sizeof(struct vnic_stats),
 906                                 vdev->stats, vdev->stats_pa);
 907                 if (vdev->fw_info)
 908                         pci_free_consistent(vdev->pdev,
 909                                 sizeof(struct vnic_devcmd_fw_info),
 910                                 vdev->fw_info, vdev->fw_info_pa);
 911                 kfree(vdev);
 912         }
 913 }
 914
 915 struct vnic_dev *vnic_dev_register(struct vnic_dev *vdev,
 916         void *priv, struct pci_dev *pdev, struct vnic_dev_bar *bar,
 917         unsigned int num_bars)
 918 {
 919         if (!vdev) {
 920                 vdev = kzalloc(sizeof(struct vnic_dev), GFP_ATOMIC);
 921                 if (!vdev)
 922                         return NULL;
 923         }
 924
 925         vdev->priv = priv;
 926         vdev->pdev = pdev;
 927
 928         if (vnic_dev_discover_res(vdev, bar, num_bars))
 929                 goto err_out;
 930
 931         vdev->devcmd = vnic_dev_get_res(vdev, RES_TYPE_DEVCMD, 0);
 932         if (!vdev->devcmd)
 933                 goto err_out;
 934
 935         return vdev;
 936
 937 err_out:
 938         vnic_dev_unregister(vdev);
 939         return NULL;
 940 }
 941
 942