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

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright 2008-2010 Cisco Systems, Inc.  All rights reserved.
   4  * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
   5  */
   6
   7 #include <linux/kernel.h>
   8 #include <linux/errno.h>
   9 #include <linux/types.h>
  10 #include <linux/pci.h>
  11 #include <linux/delay.h>
  12 #include <linux/if_ether.h>
  13
  14 #include "vnic_resource.h"
  15 #include "vnic_devcmd.h"
  16 #include "vnic_dev.h"
  17 #include "vnic_wq.h"
  18 #include "vnic_stats.h"
  19 #include "enic.h"
  20
  21 #define VNIC_MAX_RES_HDR_SIZE \
  22         (sizeof(struct vnic_resource_header) + \
  23         sizeof(struct vnic_resource) * RES_TYPE_MAX)
  24 #define VNIC_RES_STRIDE 128
  25
  26 void *vnic_dev_priv(struct vnic_dev *vdev)
  27 {
  28         return vdev->priv;
  29 }
  30
  31 static int vnic_dev_discover_res(struct vnic_dev *vdev,
  32         struct vnic_dev_bar *bar, unsigned int num_bars)
  33 {
  34         struct vnic_resource_header __iomem *rh;
  35         struct mgmt_barmap_hdr __iomem *mrh;
  36         struct vnic_resource __iomem *r;
  37         u8 type;
  38
  39         if (num_bars == 0)
  40                 return -EINVAL;
  41
  42         if (bar->len < VNIC_MAX_RES_HDR_SIZE) {
  43                 vdev_err(vdev, "vNIC BAR0 res hdr length error\n");
  44                 return -EINVAL;
  45         }
  46
  47         rh  = bar->vaddr;
  48         mrh = bar->vaddr;
  49         if (!rh) {
  50                 vdev_err(vdev, "vNIC BAR0 res hdr not mem-mapped\n");
  51                 return -EINVAL;
  52         }
  53
  54         /* Check for mgmt vnic in addition to normal vnic */
  55         if ((ioread32(&rh->magic) != VNIC_RES_MAGIC) ||
  56                 (ioread32(&rh->version) != VNIC_RES_VERSION)) {
  57                 if ((ioread32(&mrh->magic) != MGMTVNIC_MAGIC) ||
  58                         (ioread32(&mrh->version) != MGMTVNIC_VERSION)) {
  59                         vdev_err(vdev, "vNIC BAR0 res magic/version error exp (%lx/%lx) or (%lx/%lx), curr (%x/%x)\n",
  60                                  VNIC_RES_MAGIC, VNIC_RES_VERSION,
  61                                  MGMTVNIC_MAGIC, MGMTVNIC_VERSION,
  62                                  ioread32(&rh->magic), ioread32(&rh->version));
  63                         return -EINVAL;
  64                 }
  65         }
  66
  67         if (ioread32(&mrh->magic) == MGMTVNIC_MAGIC)
  68                 r = (struct vnic_resource __iomem *)(mrh + 1);
  69         else
  70                 r = (struct vnic_resource __iomem *)(rh + 1);
  71
  72
  73         while ((type = ioread8(&r->type)) != RES_TYPE_EOL) {
  74
  75                 u8 bar_num = ioread8(&r->bar);
  76                 u32 bar_offset = ioread32(&r->bar_offset);
  77                 u32 count = ioread32(&r->count);
  78                 u32 len;
  79
  80                 r++;
  81
  82                 if (bar_num >= num_bars)
  83                         continue;
  84
  85                 if (!bar[bar_num].len || !bar[bar_num].vaddr)
  86                         continue;
  87
  88                 switch (type) {
  89                 case RES_TYPE_WQ:
  90                 case RES_TYPE_RQ:
  91                 case RES_TYPE_CQ:
  92                 case RES_TYPE_INTR_CTRL:
  93                         /* each count is stride bytes long */
  94                         len = count * VNIC_RES_STRIDE;
  95                         if (len + bar_offset > bar[bar_num].len) {
  96                                 vdev_err(vdev, "vNIC BAR0 resource %d out-of-bounds, offset 0x%x + size 0x%x > bar len 0x%lx\n",
  97                                          type, bar_offset, len,
  98                                          bar[bar_num].len);
  99                                 return -EINVAL;
 100                         }
 101                         break;
 102                 case RES_TYPE_INTR_PBA_LEGACY:
 103                 case RES_TYPE_DEVCMD:
 104                 case RES_TYPE_DEVCMD2:
 105                         len = count;
 106                         break;
 107                 default:
 108                         continue;
 109                 }
 110
 111                 vdev->res[type].count = count;
 112                 vdev->res[type].vaddr = (char __iomem *)bar[bar_num].vaddr +
 113                         bar_offset;
 114                 vdev->res[type].bus_addr = bar[bar_num].bus_addr + bar_offset;
 115         }
 116
 117         return 0;
 118 }
 119
 120 unsigned int vnic_dev_get_res_count(struct vnic_dev *vdev,
 121         enum vnic_res_type type)
 122 {
 123         return vdev->res[type].count;
 124 }
 125 EXPORT_SYMBOL(vnic_dev_get_res_count);
 126
 127 void __iomem *vnic_dev_get_res(struct vnic_dev *vdev, enum vnic_res_type type,
 128         unsigned int index)
 129 {
 130         if (!vdev->res[type].vaddr)
 131                 return NULL;
 132
 133         switch (type) {
 134         case RES_TYPE_WQ:
 135         case RES_TYPE_RQ:
 136         case RES_TYPE_CQ:
 137         case RES_TYPE_INTR_CTRL:
 138                 return (char __iomem *)vdev->res[type].vaddr +
 139                         index * VNIC_RES_STRIDE;
 140         default:
 141                 return (char __iomem *)vdev->res[type].vaddr;
 142         }
 143 }
 144 EXPORT_SYMBOL(vnic_dev_get_res);
 145
 146 static unsigned int vnic_dev_desc_ring_size(struct vnic_dev_ring *ring,
 147         unsigned int desc_count, unsigned int desc_size)
 148 {
 149
 150         /* Descriptor ring base address alignment in bytes*/
 151         ring->base_align = VNIC_DESC_BASE_ALIGN;
 152
 153         /* A count of 0 means the maximum descriptors */
 154         if (desc_count == 0)
 155                 desc_count = VNIC_DESC_MAX_COUNT;
 156
 157         /* Descriptor count aligned in groups of VNIC_DESC_COUNT_ALIGN descriptors */
 158         ring->desc_count = ALIGN(desc_count, VNIC_DESC_COUNT_ALIGN);
 159
 160         /* Descriptor size alignment in bytes */
 161         ring->desc_size = ALIGN(desc_size, VNIC_DESC_SIZE_ALIGN);
 162
 163         ring->size = ring->desc_count * ring->desc_size;
 164         ring->size_unaligned = ring->size + ring->base_align;
 165
 166         return ring->size_unaligned;
 167 }
 168
 169 void vnic_dev_clear_desc_ring(struct vnic_dev_ring *ring)
 170 {
 171         memset(ring->descs, 0, ring->size);
 172 }
 173
 174 int vnic_dev_alloc_desc_ring(struct vnic_dev *vdev, struct vnic_dev_ring *ring,
 175         unsigned int desc_count, unsigned int desc_size)
 176 {
 177         vnic_dev_desc_ring_size(ring, desc_count, desc_size);
 178
 179         ring->descs_unaligned = dma_alloc_coherent(&vdev->pdev->dev,
 180                                                    ring->size_unaligned,
 181                                                    &ring->base_addr_unaligned,
 182                                                    GFP_KERNEL);
 183
 184         if (!ring->descs_unaligned) {
 185                 vdev_err(vdev, "Failed to allocate ring (size=%d), aborting\n",
 186                          (int)ring->size);
 187                 return -ENOMEM;
 188         }
 189
 190         ring->base_addr = ALIGN(ring->base_addr_unaligned,
 191                 ring->base_align);
 192         ring->descs = (u8 *)ring->descs_unaligned +
 193                 (ring->base_addr - ring->base_addr_unaligned);
 194
 195         vnic_dev_clear_desc_ring(ring);
 196
 197         ring->desc_avail = ring->desc_count - 1;
 198
 199         return 0;
 200 }
 201
 202 void vnic_dev_free_desc_ring(struct vnic_dev *vdev, struct vnic_dev_ring *ring)
 203 {
 204         if (ring->descs) {
 205                 dma_free_coherent(&vdev->pdev->dev, ring->size_unaligned,
 206                                   ring->descs_unaligned,
 207                                   ring->base_addr_unaligned);
 208                 ring->descs = NULL;
 209         }
 210 }
 211
 212 static int _vnic_dev_cmd(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd,
 213         int wait)
 214 {
 215         struct vnic_devcmd __iomem *devcmd = vdev->devcmd;
 216         unsigned int i;
 217         int delay;
 218         u32 status;
 219         int err;
 220
 221         status = ioread32(&devcmd->status);
 222         if (status == 0xFFFFFFFF) {
 223                 /* PCI-e target device is gone */
 224                 return -ENODEV;
 225         }
 226         if (status & STAT_BUSY) {
 227                 vdev_neterr(vdev, "Busy devcmd %d\n", _CMD_N(cmd));
 228                 return -EBUSY;
 229         }
 230
 231         if (_CMD_DIR(cmd) & _CMD_DIR_WRITE) {
 232                 for (i = 0; i < VNIC_DEVCMD_NARGS; i++)
 233                         writeq(vdev->args[i], &devcmd->args[i]);
 234                 wmb();
 235         }
 236
 237         iowrite32(cmd, &devcmd->cmd);
 238
 239         if ((_CMD_FLAGS(cmd) & _CMD_FLAGS_NOWAIT))
 240                 return 0;
 241
 242         for (delay = 0; delay < wait; delay++) {
 243
 244                 udelay(100);
 245
 246                 status = ioread32(&devcmd->status);
 247                 if (status == 0xFFFFFFFF) {
 248                         /* PCI-e target device is gone */
 249                         return -ENODEV;
 250                 }
 251
 252                 if (!(status & STAT_BUSY)) {
 253
 254                         if (status & STAT_ERROR) {
 255                                 err = (int)readq(&devcmd->args[0]);
 256                                 if (err == ERR_EINVAL &&
 257                                     cmd == CMD_CAPABILITY)
 258                                         return -err;
 259                                 if (err != ERR_ECMDUNKNOWN ||
 260                                     cmd != CMD_CAPABILITY)
 261                                         vdev_neterr(vdev, "Error %d devcmd %d\n",
 262                                                     err, _CMD_N(cmd));
 263                                 return -err;
 264                         }
 265
 266                         if (_CMD_DIR(cmd) & _CMD_DIR_READ) {
 267                                 rmb();
 268                                 for (i = 0; i < VNIC_DEVCMD_NARGS; i++)
 269                                         vdev->args[i] = readq(&devcmd->args[i]);
 270                         }
 271
 272                         return 0;
 273                 }
 274         }
 275
 276         vdev_neterr(vdev, "Timedout devcmd %d\n", _CMD_N(cmd));
 277         return -ETIMEDOUT;
 278 }
 279
 280 static int _vnic_dev_cmd2(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd,
 281                           int wait)
 282 {
 283         struct devcmd2_controller *dc2c = vdev->devcmd2;
 284         struct devcmd2_result *result;
 285         u8 color;
 286         unsigned int i;
 287         int delay, err;
 288         u32 fetch_index, new_posted;
 289         u32 posted = dc2c->posted;
 290
 291         fetch_index = ioread32(&dc2c->wq_ctrl->fetch_index);
 292
 293         if (fetch_index == 0xFFFFFFFF)
 294                 return -ENODEV;
 295
 296         new_posted = (posted + 1) % DEVCMD2_RING_SIZE;
 297
 298         if (new_posted == fetch_index) {
 299                 vdev_neterr(vdev, "devcmd2 %d: wq is full. fetch index: %u, posted index: %u\n",
 300                             _CMD_N(cmd), fetch_index, posted);
 301                 return -EBUSY;
 302         }
 303         dc2c->cmd_ring[posted].cmd = cmd;
 304         dc2c->cmd_ring[posted].flags = 0;
 305
 306         if ((_CMD_FLAGS(cmd) & _CMD_FLAGS_NOWAIT))
 307                 dc2c->cmd_ring[posted].flags |= DEVCMD2_FNORESULT;
 308         if (_CMD_DIR(cmd) & _CMD_DIR_WRITE)
 309                 for (i = 0; i < VNIC_DEVCMD_NARGS; i++)
 310                         dc2c->cmd_ring[posted].args[i] = vdev->args[i];
 311
 312         /* Adding write memory barrier prevents compiler and/or CPU reordering,
 313          * thus avoiding descriptor posting before descriptor is initialized.
 314          * Otherwise, hardware can read stale descriptor fields.
 315          */
 316         wmb();
 317         iowrite32(new_posted, &dc2c->wq_ctrl->posted_index);
 318         dc2c->posted = new_posted;
 319
 320         if (dc2c->cmd_ring[posted].flags & DEVCMD2_FNORESULT)
 321                 return 0;
 322
 323         result = dc2c->result + dc2c->next_result;
 324         color = dc2c->color;
 325
 326         dc2c->next_result++;
 327         if (dc2c->next_result == dc2c->result_size) {
 328                 dc2c->next_result = 0;
 329                 dc2c->color = dc2c->color ? 0 : 1;
 330         }
 331
 332         for (delay = 0; delay < wait; delay++) {
 333                 if (result->color == color) {
 334                         if (result->error) {
 335                                 err = result->error;
 336                                 if (err != ERR_ECMDUNKNOWN ||
 337                                     cmd != CMD_CAPABILITY)
 338                                         vdev_neterr(vdev, "Error %d devcmd %d\n",
 339                                                     err, _CMD_N(cmd));
 340                                 return -err;
 341                         }
 342                         if (_CMD_DIR(cmd) & _CMD_DIR_READ)
 343                                 for (i = 0; i < VNIC_DEVCMD2_NARGS; i++)
 344                                         vdev->args[i] = result->results[i];
 345
 346                         return 0;
 347                 }
 348                 udelay(100);
 349         }
 350
 351         vdev_neterr(vdev, "devcmd %d timed out\n", _CMD_N(cmd));
 352
 353         return -ETIMEDOUT;
 354 }
 355
 356 static int vnic_dev_init_devcmd1(struct vnic_dev *vdev)
 357 {
 358         vdev->devcmd = vnic_dev_get_res(vdev, RES_TYPE_DEVCMD, 0);
 359         if (!vdev->devcmd)
 360                 return -ENODEV;
 361         vdev->devcmd_rtn = _vnic_dev_cmd;
 362
 363         return 0;
 364 }
 365
 366 static int vnic_dev_init_devcmd2(struct vnic_dev *vdev)
 367 {
 368         int err;
 369         unsigned int fetch_index;
 370
 371         if (vdev->devcmd2)
 372                 return 0;
 373
 374         vdev->devcmd2 = kzalloc(sizeof(*vdev->devcmd2), GFP_KERNEL);
 375         if (!vdev->devcmd2)
 376                 return -ENOMEM;
 377
 378         vdev->devcmd2->color = 1;
 379         vdev->devcmd2->result_size = DEVCMD2_RING_SIZE;
 380         err = enic_wq_devcmd2_alloc(vdev, &vdev->devcmd2->wq, DEVCMD2_RING_SIZE,
 381                                     DEVCMD2_DESC_SIZE);
 382         if (err)
 383                 goto err_free_devcmd2;
 384
 385         fetch_index = ioread32(&vdev->devcmd2->wq.ctrl->fetch_index);
 386         if (fetch_index == 0xFFFFFFFF) { /* check for hardware gone  */
 387                 vdev_err(vdev, "Fatal error in devcmd2 init - hardware surprise removal\n");
 388                 err = -ENODEV;
 389                 goto err_free_wq;
 390         }
 391
 392         enic_wq_init_start(&vdev->devcmd2->wq, 0, fetch_index, fetch_index, 0,
 393                            0);
 394         vdev->devcmd2->posted = fetch_index;
 395         vnic_wq_enable(&vdev->devcmd2->wq);
 396
 397         err = vnic_dev_alloc_desc_ring(vdev, &vdev->devcmd2->results_ring,
 398                                        DEVCMD2_RING_SIZE, DEVCMD2_DESC_SIZE);
 399         if (err)
 400                 goto err_disable_wq;
 401
 402         vdev->devcmd2->result = vdev->devcmd2->results_ring.descs;
 403         vdev->devcmd2->cmd_ring = vdev->devcmd2->wq.ring.descs;
 404         vdev->devcmd2->wq_ctrl = vdev->devcmd2->wq.ctrl;
 405         vdev->args[0] = (u64)vdev->devcmd2->results_ring.base_addr |
 406                         VNIC_PADDR_TARGET;
 407         vdev->args[1] = DEVCMD2_RING_SIZE;
 408
 409         err = _vnic_dev_cmd2(vdev, CMD_INITIALIZE_DEVCMD2, 1000);
 410         if (err)
 411                 goto err_free_desc_ring;
 412
 413         vdev->devcmd_rtn = _vnic_dev_cmd2;
 414
 415         return 0;
 416
 417 err_free_desc_ring:
 418         vnic_dev_free_desc_ring(vdev, &vdev->devcmd2->results_ring);
 419 err_disable_wq:
 420         vnic_wq_disable(&vdev->devcmd2->wq);
 421 err_free_wq:
 422         vnic_wq_free(&vdev->devcmd2->wq);
 423 err_free_devcmd2:
 424         kfree(vdev->devcmd2);
 425         vdev->devcmd2 = NULL;
 426
 427         return err;
 428 }
 429
 430 static void vnic_dev_deinit_devcmd2(struct vnic_dev *vdev)
 431 {
 432         vnic_dev_free_desc_ring(vdev, &vdev->devcmd2->results_ring);
 433         vnic_wq_disable(&vdev->devcmd2->wq);
 434         vnic_wq_free(&vdev->devcmd2->wq);
 435         kfree(vdev->devcmd2);
 436 }
 437
 438 static int vnic_dev_cmd_proxy(struct vnic_dev *vdev,
 439         enum vnic_devcmd_cmd proxy_cmd, enum vnic_devcmd_cmd cmd,
 440         u64 *a0, u64 *a1, int wait)
 441 {
 442         u32 status;
 443         int err;
 444
 445         memset(vdev->args, 0, sizeof(vdev->args));
 446
 447         vdev->args[0] = vdev->proxy_index;
 448         vdev->args[1] = cmd;
 449         vdev->args[2] = *a0;
 450         vdev->args[3] = *a1;
 451
 452         err = vdev->devcmd_rtn(vdev, proxy_cmd, wait);
 453         if (err)
 454                 return err;
 455
 456         status = (u32)vdev->args[0];
 457         if (status & STAT_ERROR) {
 458                 err = (int)vdev->args[1];
 459                 if (err != ERR_ECMDUNKNOWN ||
 460                     cmd != CMD_CAPABILITY)
 461                         vdev_neterr(vdev, "Error %d proxy devcmd %d\n",
 462                                     err, _CMD_N(cmd));
 463                 return err;
 464         }
 465
 466         *a0 = vdev->args[1];
 467         *a1 = vdev->args[2];
 468
 469         return 0;
 470 }
 471
 472 static int vnic_dev_cmd_no_proxy(struct vnic_dev *vdev,
 473         enum vnic_devcmd_cmd cmd, u64 *a0, u64 *a1, int wait)
 474 {
 475         int err;
 476
 477         vdev->args[0] = *a0;
 478         vdev->args[1] = *a1;
 479
 480         err = vdev->devcmd_rtn(vdev, cmd, wait);
 481
 482         *a0 = vdev->args[0];
 483         *a1 = vdev->args[1];
 484
 485         return err;
 486 }
 487
 488 void vnic_dev_cmd_proxy_by_index_start(struct vnic_dev *vdev, u16 index)
 489 {
 490         vdev->proxy = PROXY_BY_INDEX;
 491         vdev->proxy_index = index;
 492 }
 493
 494 void vnic_dev_cmd_proxy_end(struct vnic_dev *vdev)
 495 {
 496         vdev->proxy = PROXY_NONE;
 497         vdev->proxy_index = 0;
 498 }
 499
 500 int vnic_dev_cmd(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd,
 501         u64 *a0, u64 *a1, int wait)
 502 {
 503         memset(vdev->args, 0, sizeof(vdev->args));
 504
 505         switch (vdev->proxy) {
 506         case PROXY_BY_INDEX:
 507                 return vnic_dev_cmd_proxy(vdev, CMD_PROXY_BY_INDEX, cmd,
 508                                 a0, a1, wait);
 509         case PROXY_BY_BDF:
 510                 return vnic_dev_cmd_proxy(vdev, CMD_PROXY_BY_BDF, cmd,
 511                                 a0, a1, wait);
 512         case PROXY_NONE:
 513         default:
 514                 return vnic_dev_cmd_no_proxy(vdev, cmd, a0, a1, wait);
 515         }
 516 }
 517
 518 static int vnic_dev_capable(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd)
 519 {
 520         u64 a0 = (u32)cmd, a1 = 0;
 521         int wait = 1000;
 522         int err;
 523
 524         err = vnic_dev_cmd(vdev, CMD_CAPABILITY, &a0, &a1, wait);
 525
 526         return !(err || a0);
 527 }
 528
 529 int vnic_dev_fw_info(struct vnic_dev *vdev,
 530         struct vnic_devcmd_fw_info **fw_info)
 531 {
 532         u64 a0, a1 = 0;
 533         int wait = 1000;
 534         int err = 0;
 535
 536         if (!vdev->fw_info) {
 537                 vdev->fw_info = dma_alloc_coherent(&vdev->pdev->dev,
 538                                                    sizeof(struct vnic_devcmd_fw_info),
 539                                                    &vdev->fw_info_pa, GFP_ATOMIC);
 540                 if (!vdev->fw_info)
 541                         return -ENOMEM;
 542
 543                 a0 = vdev->fw_info_pa;
 544                 a1 = sizeof(struct vnic_devcmd_fw_info);
 545
 546                 /* only get fw_info once and cache it */
 547                 if (vnic_dev_capable(vdev, CMD_MCPU_FW_INFO))
 548                         err = vnic_dev_cmd(vdev, CMD_MCPU_FW_INFO,
 549                                 &a0, &a1, wait);
 550                 else
 551                         err = vnic_dev_cmd(vdev, CMD_MCPU_FW_INFO_OLD,
 552                                 &a0, &a1, wait);
 553         }
 554
 555         *fw_info = vdev->fw_info;
 556
 557         return err;
 558 }
 559
 560 int vnic_dev_spec(struct vnic_dev *vdev, unsigned int offset, unsigned int size,
 561         void *value)
 562 {
 563         u64 a0, a1;
 564         int wait = 1000;
 565         int err;
 566
 567         a0 = offset;
 568         a1 = size;
 569
 570         err = vnic_dev_cmd(vdev, CMD_DEV_SPEC, &a0, &a1, wait);
 571
 572         switch (size) {
 573         case 1: *(u8 *)value = (u8)a0; break;
 574         case 2: *(u16 *)value = (u16)a0; break;
 575         case 4: *(u32 *)value = (u32)a0; break;
 576         case 8: *(u64 *)value = a0; break;
 577         default: BUG(); break;
 578         }
 579
 580         return err;
 581 }
 582
 583 int vnic_dev_stats_dump(struct vnic_dev *vdev, struct vnic_stats **stats)
 584 {
 585         u64 a0, a1;
 586         int wait = 1000;
 587
 588         if (!vdev->stats) {
 589                 vdev->stats = dma_alloc_coherent(&vdev->pdev->dev,
 590                                                  sizeof(struct vnic_stats),
 591                                                  &vdev->stats_pa, GFP_ATOMIC);
 592                 if (!vdev->stats)
 593                         return -ENOMEM;
 594         }
 595
 596         *stats = vdev->stats;
 597         a0 = vdev->stats_pa;
 598         a1 = sizeof(struct vnic_stats);
 599
 600         return vnic_dev_cmd(vdev, CMD_STATS_DUMP, &a0, &a1, wait);
 601 }
 602
 603 int vnic_dev_close(struct vnic_dev *vdev)
 604 {
 605         u64 a0 = 0, a1 = 0;
 606         int wait = 1000;
 607         return vnic_dev_cmd(vdev, CMD_CLOSE, &a0, &a1, wait);
 608 }
 609
 610 int vnic_dev_enable_wait(struct vnic_dev *vdev)
 611 {
 612         u64 a0 = 0, a1 = 0;
 613         int wait = 1000;
 614
 615         if (vnic_dev_capable(vdev, CMD_ENABLE_WAIT))
 616                 return vnic_dev_cmd(vdev, CMD_ENABLE_WAIT, &a0, &a1, wait);
 617         else
 618                 return vnic_dev_cmd(vdev, CMD_ENABLE, &a0, &a1, wait);
 619 }
 620
 621 int vnic_dev_disable(struct vnic_dev *vdev)
 622 {
 623         u64 a0 = 0, a1 = 0;
 624         int wait = 1000;
 625         return vnic_dev_cmd(vdev, CMD_DISABLE, &a0, &a1, wait);
 626 }
 627
 628 int vnic_dev_open(struct vnic_dev *vdev, int arg)
 629 {
 630         u64 a0 = (u32)arg, a1 = 0;
 631         int wait = 1000;
 632         return vnic_dev_cmd(vdev, CMD_OPEN, &a0, &a1, wait);
 633 }
 634
 635 int vnic_dev_open_done(struct vnic_dev *vdev, int *done)
 636 {
 637         u64 a0 = 0, a1 = 0;
 638         int wait = 1000;
 639         int err;
 640
 641         *done = 0;
 642
 643         err = vnic_dev_cmd(vdev, CMD_OPEN_STATUS, &a0, &a1, wait);
 644         if (err)
 645                 return err;
 646
 647         *done = (a0 == 0);
 648
 649         return 0;
 650 }
 651
 652 int vnic_dev_soft_reset(struct vnic_dev *vdev, int arg)
 653 {
 654         u64 a0 = (u32)arg, a1 = 0;
 655         int wait = 1000;
 656         return vnic_dev_cmd(vdev, CMD_SOFT_RESET, &a0, &a1, wait);
 657 }
 658
 659 int vnic_dev_soft_reset_done(struct vnic_dev *vdev, int *done)
 660 {
 661         u64 a0 = 0, a1 = 0;
 662         int wait = 1000;
 663         int err;
 664
 665         *done = 0;
 666
 667         err = vnic_dev_cmd(vdev, CMD_SOFT_RESET_STATUS, &a0, &a1, wait);
 668         if (err)
 669                 return err;
 670
 671         *done = (a0 == 0);
 672
 673         return 0;
 674 }
 675
 676 int vnic_dev_hang_reset(struct vnic_dev *vdev, int arg)
 677 {
 678         u64 a0 = (u32)arg, a1 = 0;
 679         int wait = 1000;
 680         int err;
 681
 682         if (vnic_dev_capable(vdev, CMD_HANG_RESET)) {
 683                 return vnic_dev_cmd(vdev, CMD_HANG_RESET,
 684                                 &a0, &a1, wait);
 685         } else {
 686                 err = vnic_dev_soft_reset(vdev, arg);
 687                 if (err)
 688                         return err;
 689                 return vnic_dev_init(vdev, 0);
 690         }
 691 }
 692
 693 int vnic_dev_hang_reset_done(struct vnic_dev *vdev, int *done)
 694 {
 695         u64 a0 = 0, a1 = 0;
 696         int wait = 1000;
 697         int err;
 698
 699         *done = 0;
 700
 701         if (vnic_dev_capable(vdev, CMD_HANG_RESET_STATUS)) {
 702                 err = vnic_dev_cmd(vdev, CMD_HANG_RESET_STATUS,
 703                                 &a0, &a1, wait);
 704                 if (err)
 705                         return err;
 706         } else {
 707                 return vnic_dev_soft_reset_done(vdev, done);
 708         }
 709
 710         *done = (a0 == 0);
 711
 712         return 0;
 713 }
 714
 715 int vnic_dev_hang_notify(struct vnic_dev *vdev)
 716 {
 717         u64 a0, a1;
 718         int wait = 1000;
 719         return vnic_dev_cmd(vdev, CMD_HANG_NOTIFY, &a0, &a1, wait);
 720 }
 721
 722 int vnic_dev_get_mac_addr(struct vnic_dev *vdev, u8 *mac_addr)
 723 {
 724         u64 a0, a1;
 725         int wait = 1000;
 726         int err, i;
 727
 728         for (i = 0; i < ETH_ALEN; i++)
 729                 mac_addr[i] = 0;
 730
 731         err = vnic_dev_cmd(vdev, CMD_GET_MAC_ADDR, &a0, &a1, wait);
 732         if (err)
 733                 return err;
 734
 735         for (i = 0; i < ETH_ALEN; i++)
 736                 mac_addr[i] = ((u8 *)&a0)[i];
 737
 738         return 0;
 739 }
 740
 741 int vnic_dev_packet_filter(struct vnic_dev *vdev, int directed, int multicast,
 742         int broadcast, int promisc, int allmulti)
 743 {
 744         u64 a0, a1 = 0;
 745         int wait = 1000;
 746         int err;
 747
 748         a0 = (directed ? CMD_PFILTER_DIRECTED : 0) |
 749              (multicast ? CMD_PFILTER_MULTICAST : 0) |
 750              (broadcast ? CMD_PFILTER_BROADCAST : 0) |
 751              (promisc ? CMD_PFILTER_PROMISCUOUS : 0) |
 752              (allmulti ? CMD_PFILTER_ALL_MULTICAST : 0);
 753
 754         err = vnic_dev_cmd(vdev, CMD_PACKET_FILTER, &a0, &a1, wait);
 755         if (err)
 756                 vdev_neterr(vdev, "Can't set packet filter\n");
 757
 758         return err;
 759 }
 760
 761 int vnic_dev_add_addr(struct vnic_dev *vdev, const u8 *addr)
 762 {
 763         u64 a0 = 0, a1 = 0;
 764         int wait = 1000;
 765         int err;
 766         int i;
 767
 768         for (i = 0; i < ETH_ALEN; i++)
 769                 ((u8 *)&a0)[i] = addr[i];
 770
 771         err = vnic_dev_cmd(vdev, CMD_ADDR_ADD, &a0, &a1, wait);
 772         if (err)
 773                 vdev_neterr(vdev, "Can't add addr [%pM], %d\n", addr, err);
 774
 775         return err;
 776 }
 777
 778 int vnic_dev_del_addr(struct vnic_dev *vdev, const u8 *addr)
 779 {
 780         u64 a0 = 0, a1 = 0;
 781         int wait = 1000;
 782         int err;
 783         int i;
 784
 785         for (i = 0; i < ETH_ALEN; i++)
 786                 ((u8 *)&a0)[i] = addr[i];
 787
 788         err = vnic_dev_cmd(vdev, CMD_ADDR_DEL, &a0, &a1, wait);
 789         if (err)
 790                 vdev_neterr(vdev, "Can't del addr [%pM], %d\n", addr, err);
 791
 792         return err;
 793 }
 794
 795 int vnic_dev_set_ig_vlan_rewrite_mode(struct vnic_dev *vdev,
 796         u8 ig_vlan_rewrite_mode)
 797 {
 798         u64 a0 = ig_vlan_rewrite_mode, a1 = 0;
 799         int wait = 1000;
 800
 801         if (vnic_dev_capable(vdev, CMD_IG_VLAN_REWRITE_MODE))
 802                 return vnic_dev_cmd(vdev, CMD_IG_VLAN_REWRITE_MODE,
 803                                 &a0, &a1, wait);
 804         else
 805                 return 0;
 806 }
 807
 808 static int vnic_dev_notify_setcmd(struct vnic_dev *vdev,
 809         void *notify_addr, dma_addr_t notify_pa, u16 intr)
 810 {
 811         u64 a0, a1;
 812         int wait = 1000;
 813         int r;
 814
 815         memset(notify_addr, 0, sizeof(struct vnic_devcmd_notify));
 816         vdev->notify = notify_addr;
 817         vdev->notify_pa = notify_pa;
 818
 819         a0 = (u64)notify_pa;
 820         a1 = ((u64)intr << 32) & 0x0000ffff00000000ULL;
 821         a1 += sizeof(struct vnic_devcmd_notify);
 822
 823         r = vnic_dev_cmd(vdev, CMD_NOTIFY, &a0, &a1, wait);
 824         vdev->notify_sz = (r == 0) ? (u32)a1 : 0;
 825         return r;
 826 }
 827
 828 int vnic_dev_notify_set(struct vnic_dev *vdev, u16 intr)
 829 {
 830         void *notify_addr;
 831         dma_addr_t notify_pa;
 832
 833         if (vdev->notify || vdev->notify_pa) {
 834                 vdev_neterr(vdev, "notify block %p still allocated\n",
 835                             vdev->notify);
 836                 return -EINVAL;
 837         }
 838
 839         notify_addr = dma_alloc_coherent(&vdev->pdev->dev,
 840                                          sizeof(struct vnic_devcmd_notify),
 841                                          &notify_pa, GFP_ATOMIC);
 842         if (!notify_addr)
 843                 return -ENOMEM;
 844
 845         return vnic_dev_notify_setcmd(vdev, notify_addr, notify_pa, intr);
 846 }
 847
 848 static int vnic_dev_notify_unsetcmd(struct vnic_dev *vdev)
 849 {
 850         u64 a0, a1;
 851         int wait = 1000;
 852         int err;
 853
 854         a0 = 0;  /* paddr = 0 to unset notify buffer */
 855         a1 = 0x0000ffff00000000ULL; /* intr num = -1 to unreg for intr */
 856         a1 += sizeof(struct vnic_devcmd_notify);
 857
 858         err = vnic_dev_cmd(vdev, CMD_NOTIFY, &a0, &a1, wait);
 859         vdev->notify = NULL;
 860         vdev->notify_pa = 0;
 861         vdev->notify_sz = 0;
 862
 863         return err;
 864 }
 865
 866 int vnic_dev_notify_unset(struct vnic_dev *vdev)
 867 {
 868         if (vdev->notify) {
 869                 dma_free_coherent(&vdev->pdev->dev,
 870                                   sizeof(struct vnic_devcmd_notify),
 871                                   vdev->notify, vdev->notify_pa);
 872         }
 873
 874         return vnic_dev_notify_unsetcmd(vdev);
 875 }
 876
 877 static int vnic_dev_notify_ready(struct vnic_dev *vdev)
 878 {
 879         u32 *words;
 880         unsigned int nwords = vdev->notify_sz / 4;
 881         unsigned int i;
 882         u32 csum;
 883
 884         if (!vdev->notify || !vdev->notify_sz)
 885                 return 0;
 886
 887         do {
 888                 csum = 0;
 889                 memcpy(&vdev->notify_copy, vdev->notify, vdev->notify_sz);
 890                 words = (u32 *)&vdev->notify_copy;
 891                 for (i = 1; i < nwords; i++)
 892                         csum += words[i];
 893         } while (csum != words[0]);
 894
 895         return 1;
 896 }
 897
 898 int vnic_dev_init(struct vnic_dev *vdev, int arg)
 899 {
 900         u64 a0 = (u32)arg, a1 = 0;
 901         int wait = 1000;
 902         int r = 0;
 903
 904         if (vnic_dev_capable(vdev, CMD_INIT))
 905                 r = vnic_dev_cmd(vdev, CMD_INIT, &a0, &a1, wait);
 906         else {
 907                 vnic_dev_cmd(vdev, CMD_INIT_v1, &a0, &a1, wait);
 908                 if (a0 & CMD_INITF_DEFAULT_MAC) {
 909                         /* Emulate these for old CMD_INIT_v1 which
 910                          * didn't pass a0 so no CMD_INITF_*.
 911                          */
 912                         vnic_dev_cmd(vdev, CMD_GET_MAC_ADDR, &a0, &a1, wait);
 913                         vnic_dev_cmd(vdev, CMD_ADDR_ADD, &a0, &a1, wait);
 914                 }
 915         }
 916         return r;
 917 }
 918
 919 int vnic_dev_deinit(struct vnic_dev *vdev)
 920 {
 921         u64 a0 = 0, a1 = 0;
 922         int wait = 1000;
 923
 924         return vnic_dev_cmd(vdev, CMD_DEINIT, &a0, &a1, wait);
 925 }
 926
 927 void vnic_dev_intr_coal_timer_info_default(struct vnic_dev *vdev)
 928 {
 929         /* Default: hardware intr coal timer is in units of 1.5 usecs */
 930         vdev->intr_coal_timer_info.mul = 2;
 931         vdev->intr_coal_timer_info.div = 3;
 932         vdev->intr_coal_timer_info.max_usec =
 933                 vnic_dev_intr_coal_timer_hw_to_usec(vdev, 0xffff);
 934 }
 935
 936 int vnic_dev_intr_coal_timer_info(struct vnic_dev *vdev)
 937 {
 938         int wait = 1000;
 939         int err;
 940
 941         memset(vdev->args, 0, sizeof(vdev->args));
 942
 943         if (vnic_dev_capable(vdev, CMD_INTR_COAL_CONVERT))
 944                 err = vdev->devcmd_rtn(vdev, CMD_INTR_COAL_CONVERT, wait);
 945         else
 946                 err = ERR_ECMDUNKNOWN;
 947
 948         /* Use defaults when firmware doesn't support the devcmd at all or
 949          * supports it for only specific hardware
 950          */
 951         if ((err == ERR_ECMDUNKNOWN) ||
 952                 (!err && !(vdev->args[0] && vdev->args[1] && vdev->args[2]))) {
 953                 vdev_netwarn(vdev, "Using default conversion factor for interrupt coalesce timer\n");
 954                 vnic_dev_intr_coal_timer_info_default(vdev);
 955                 return 0;
 956         }
 957
 958         if (!err) {
 959                 vdev->intr_coal_timer_info.mul = (u32) vdev->args[0];
 960                 vdev->intr_coal_timer_info.div = (u32) vdev->args[1];
 961                 vdev->intr_coal_timer_info.max_usec = (u32) vdev->args[2];
 962         }
 963
 964         return err;
 965 }
 966
 967 int vnic_dev_link_status(struct vnic_dev *vdev)
 968 {
 969         if (!vnic_dev_notify_ready(vdev))
 970                 return 0;
 971
 972         return vdev->notify_copy.link_state;
 973 }
 974
 975 u32 vnic_dev_port_speed(struct vnic_dev *vdev)
 976 {
 977         if (!vnic_dev_notify_ready(vdev))
 978                 return 0;
 979
 980         return vdev->notify_copy.port_speed;
 981 }
 982
 983 u32 vnic_dev_msg_lvl(struct vnic_dev *vdev)
 984 {
 985         if (!vnic_dev_notify_ready(vdev))
 986                 return 0;
 987
 988         return vdev->notify_copy.msglvl;
 989 }
 990
 991 u32 vnic_dev_mtu(struct vnic_dev *vdev)
 992 {
 993         if (!vnic_dev_notify_ready(vdev))
 994                 return 0;
 995
 996         return vdev->notify_copy.mtu;
 997 }
 998
 999 void vnic_dev_set_intr_mode(struct vnic_dev *vdev,
1000         enum vnic_dev_intr_mode intr_mode)
1001 {
1002         vdev->intr_mode = intr_mode;
1003 }
1004
1005 enum vnic_dev_intr_mode vnic_dev_get_intr_mode(
1006         struct vnic_dev *vdev)
1007 {
1008         return vdev->intr_mode;
1009 }
1010
1011 u32 vnic_dev_intr_coal_timer_usec_to_hw(struct vnic_dev *vdev, u32 usec)
1012 {
1013         return (usec * vdev->intr_coal_timer_info.mul) /
1014                 vdev->intr_coal_timer_info.div;
1015 }
1016
1017 u32 vnic_dev_intr_coal_timer_hw_to_usec(struct vnic_dev *vdev, u32 hw_cycles)
1018 {
1019         return (hw_cycles * vdev->intr_coal_timer_info.div) /
1020                 vdev->intr_coal_timer_info.mul;
1021 }
1022
1023 u32 vnic_dev_get_intr_coal_timer_max(struct vnic_dev *vdev)
1024 {
1025         return vdev->intr_coal_timer_info.max_usec;
1026 }
1027
1028 void vnic_dev_unregister(struct vnic_dev *vdev)
1029 {
1030         if (vdev) {
1031                 if (vdev->notify)
1032                         dma_free_coherent(&vdev->pdev->dev,
1033                                           sizeof(struct vnic_devcmd_notify),
1034                                           vdev->notify, vdev->notify_pa);
1035                 if (vdev->stats)
1036                         dma_free_coherent(&vdev->pdev->dev,
1037                                           sizeof(struct vnic_stats),
1038                                           vdev->stats, vdev->stats_pa);
1039                 if (vdev->fw_info)
1040                         dma_free_coherent(&vdev->pdev->dev,
1041                                           sizeof(struct vnic_devcmd_fw_info),
1042                                           vdev->fw_info, vdev->fw_info_pa);
1043                 if (vdev->devcmd2)
1044                         vnic_dev_deinit_devcmd2(vdev);
1045
1046                 kfree(vdev);
1047         }
1048 }
1049 EXPORT_SYMBOL(vnic_dev_unregister);
1050
1051 struct vnic_dev *vnic_dev_register(struct vnic_dev *vdev,
1052         void *priv, struct pci_dev *pdev, struct vnic_dev_bar *bar,
1053         unsigned int num_bars)
1054 {
1055         if (!vdev) {
1056                 vdev = kzalloc(sizeof(struct vnic_dev), GFP_KERNEL);
1057                 if (!vdev)
1058                         return NULL;
1059         }
1060
1061         vdev->priv = priv;
1062         vdev->pdev = pdev;
1063
1064         if (vnic_dev_discover_res(vdev, bar, num_bars))
1065                 goto err_out;
1066
1067         return vdev;
1068
1069 err_out:
1070         vnic_dev_unregister(vdev);
1071         return NULL;
1072 }
1073 EXPORT_SYMBOL(vnic_dev_register);
1074
1075 struct pci_dev *vnic_dev_get_pdev(struct vnic_dev *vdev)
1076 {
1077         return vdev->pdev;
1078 }
1079 EXPORT_SYMBOL(vnic_dev_get_pdev);
1080
1081 int vnic_devcmd_init(struct vnic_dev *vdev)
1082 {
1083         void __iomem *res;
1084         int err;
1085
1086         res = vnic_dev_get_res(vdev, RES_TYPE_DEVCMD2, 0);
1087         if (res) {
1088                 err = vnic_dev_init_devcmd2(vdev);
1089                 if (err)
1090                         vdev_warn(vdev, "DEVCMD2 init failed: %d, Using DEVCMD1\n",
1091                                   err);
1092                 else
1093                         return 0;
1094         } else {
1095                 vdev_warn(vdev, "DEVCMD2 resource not found (old firmware?) Using DEVCMD1\n");
1096         }
1097         err = vnic_dev_init_devcmd1(vdev);
1098         if (err)
1099                 vdev_err(vdev, "DEVCMD1 initialization failed: %d\n", err);
1100
1101         return err;
1102 }
1103
1104 int vnic_dev_init_prov2(struct vnic_dev *vdev, u8 *buf, u32 len)
1105 {
1106         u64 a0, a1 = len;
1107         int wait = 1000;
1108         dma_addr_t prov_pa;
1109         void *prov_buf;
1110         int ret;
1111
1112         prov_buf = dma_alloc_coherent(&vdev->pdev->dev, len, &prov_pa, GFP_ATOMIC);
1113         if (!prov_buf)
1114                 return -ENOMEM;
1115
1116         memcpy(prov_buf, buf, len);
1117
1118         a0 = prov_pa;
1119
1120         ret = vnic_dev_cmd(vdev, CMD_INIT_PROV_INFO2, &a0, &a1, wait);
1121
1122         dma_free_coherent(&vdev->pdev->dev, len, prov_buf, prov_pa);
1123
1124         return ret;
1125 }
1126
1127 int vnic_dev_enable2(struct vnic_dev *vdev, int active)
1128 {
1129         u64 a0, a1 = 0;
1130         int wait = 1000;
1131
1132         a0 = (active ? CMD_ENABLE2_ACTIVE : 0);
1133
1134         return vnic_dev_cmd(vdev, CMD_ENABLE2, &a0, &a1, wait);
1135 }
1136
1137 static int vnic_dev_cmd_status(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd,
1138         int *status)
1139 {
1140         u64 a0 = cmd, a1 = 0;
1141         int wait = 1000;
1142         int ret;
1143
1144         ret = vnic_dev_cmd(vdev, CMD_STATUS, &a0, &a1, wait);
1145         if (!ret)
1146                 *status = (int)a0;
1147
1148         return ret;
1149 }
1150
1151 int vnic_dev_enable2_done(struct vnic_dev *vdev, int *status)
1152 {
1153         return vnic_dev_cmd_status(vdev, CMD_ENABLE2, status);
1154 }
1155
1156 int vnic_dev_deinit_done(struct vnic_dev *vdev, int *status)
1157 {
1158         return vnic_dev_cmd_status(vdev, CMD_DEINIT, status);
1159 }
1160
1161 int vnic_dev_set_mac_addr(struct vnic_dev *vdev, u8 *mac_addr)
1162 {
1163         u64 a0, a1;
1164         int wait = 1000;
1165         int i;
1166
1167         for (i = 0; i < ETH_ALEN; i++)
1168                 ((u8 *)&a0)[i] = mac_addr[i];
1169
1170         return vnic_dev_cmd(vdev, CMD_SET_MAC_ADDR, &a0, &a1, wait);
1171 }
1172
1173 /* vnic_dev_classifier: Add/Delete classifier entries
1174  * @vdev: vdev of the device
1175  * @cmd: CLSF_ADD for Add filter
1176  *       CLSF_DEL for Delete filter
1177  * @entry: In case of ADD filter, the caller passes the RQ number in this
1178  *         variable.
1179  *
1180  *         This function stores the filter_id returned by the firmware in the
1181  *         same variable before return;
1182  *
1183  *         In case of DEL filter, the caller passes the RQ number. Return
1184  *         value is irrelevant.
1185  * @data: filter data
1186  */
1187 int vnic_dev_classifier(struct vnic_dev *vdev, u8 cmd, u16 *entry,
1188                         struct filter *data)
1189 {
1190         u64 a0, a1;
1191         int wait = 1000;
1192         dma_addr_t tlv_pa;
1193         int ret = -EINVAL;
1194         struct filter_tlv *tlv, *tlv_va;
1195         struct filter_action *action;
1196         u64 tlv_size;
1197
1198         if (cmd == CLSF_ADD) {
1199                 tlv_size = sizeof(struct filter) +
1200                            sizeof(struct filter_action) +
1201                            2 * sizeof(struct filter_tlv);
1202                 tlv_va = dma_alloc_coherent(&vdev->pdev->dev, tlv_size,
1203                                             &tlv_pa, GFP_ATOMIC);
1204                 if (!tlv_va)
1205                         return -ENOMEM;
1206                 tlv = tlv_va;
1207                 a0 = tlv_pa;
1208                 a1 = tlv_size;
1209                 memset(tlv, 0, tlv_size);
1210                 tlv->type = CLSF_TLV_FILTER;
1211                 tlv->length = sizeof(struct filter);
1212                 *(struct filter *)&tlv->val = *data;
1213
1214                 tlv = (struct filter_tlv *)((char *)tlv +
1215                                             sizeof(struct filter_tlv) +
1216                                             sizeof(struct filter));
1217
1218                 tlv->type = CLSF_TLV_ACTION;
1219                 tlv->length = sizeof(struct filter_action);
1220                 action = (struct filter_action *)&tlv->val;
1221                 action->type = FILTER_ACTION_RQ_STEERING;
1222                 action->u.rq_idx = *entry;
1223
1224                 ret = vnic_dev_cmd(vdev, CMD_ADD_FILTER, &a0, &a1, wait);
1225                 *entry = (u16)a0;
1226                 dma_free_coherent(&vdev->pdev->dev, tlv_size, tlv_va, tlv_pa);
1227         } else if (cmd == CLSF_DEL) {
1228                 a0 = *entry;
1229                 ret = vnic_dev_cmd(vdev, CMD_DEL_FILTER, &a0, &a1, wait);
1230         }
1231
1232         return ret;
1233 }
1234
1235 int vnic_dev_overlay_offload_ctrl(struct vnic_dev *vdev, u8 overlay, u8 config)
1236 {
1237         u64 a0 = overlay;
1238         u64 a1 = config;
1239         int wait = 1000;
1240
1241         return vnic_dev_cmd(vdev, CMD_OVERLAY_OFFLOAD_CTRL, &a0, &a1, wait);
1242 }
1243
1244 int vnic_dev_overlay_offload_cfg(struct vnic_dev *vdev, u8 overlay,
1245                                  u16 vxlan_udp_port_number)
1246 {
1247         u64 a1 = vxlan_udp_port_number;
1248         u64 a0 = overlay;
1249         int wait = 1000;
1250
1251         return vnic_dev_cmd(vdev, CMD_OVERLAY_OFFLOAD_CFG, &a0, &a1, wait);
1252 }
1253
1254 int vnic_dev_get_supported_feature_ver(struct vnic_dev *vdev, u8 feature,
1255                                        u64 *supported_versions, u64 *a1)
1256 {
1257         u64 a0 = feature;
1258         int wait = 1000;
1259         int ret;
1260
1261         ret = vnic_dev_cmd(vdev, CMD_GET_SUPP_FEATURE_VER, &a0, a1, wait);
1262         if (!ret)
1263                 *supported_versions = a0;
1264
1265         return ret;
1266 }
1267
1268 int vnic_dev_capable_rss_hash_type(struct vnic_dev *vdev, u8 *rss_hash_type)
1269 {
1270         u64 a0 = CMD_NIC_CFG, a1 = 0;
1271         int wait = 1000;
1272         int err;
1273
1274         err = vnic_dev_cmd(vdev, CMD_CAPABILITY, &a0, &a1, wait);
1275         /* rss_hash_type is valid only when a0 is 1. Adapter which does not
1276          * support CMD_CAPABILITY for rss_hash_type has a0 = 0
1277          */
1278         if (err || (a0 != 1))
1279                 return -EOPNOTSUPP;
1280
1281         a1 = (a1 >> NIC_CFG_RSS_HASH_TYPE_SHIFT) &
1282              NIC_CFG_RSS_HASH_TYPE_MASK_FIELD;
1283
1284         *rss_hash_type = (u8)a1;
1285
1286         return 0;
1287 }