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_wq.h"
  31 #include "vnic_stats.h"
  32 #include "enic.h"
  33
  34 #define VNIC_MAX_RES_HDR_SIZE \
  35         (sizeof(struct vnic_resource_header) + \
  36         sizeof(struct vnic_resource) * RES_TYPE_MAX)
  37 #define VNIC_RES_STRIDE 128
  38
  39 void *vnic_dev_priv(struct vnic_dev *vdev)
  40 {
  41         return vdev->priv;
  42 }
  43
  44 static int vnic_dev_discover_res(struct vnic_dev *vdev,
  45         struct vnic_dev_bar *bar, unsigned int num_bars)
  46 {
  47         struct vnic_resource_header __iomem *rh;
  48         struct mgmt_barmap_hdr __iomem *mrh;
  49         struct vnic_resource __iomem *r;
  50         u8 type;
  51
  52         if (num_bars == 0)
  53                 return -EINVAL;
  54
  55         if (bar->len < VNIC_MAX_RES_HDR_SIZE) {
  56                 vdev_err(vdev, "vNIC BAR0 res hdr length error\n");
  57                 return -EINVAL;
  58         }
  59
  60         rh  = bar->vaddr;
  61         mrh = bar->vaddr;
  62         if (!rh) {
  63                 vdev_err(vdev, "vNIC BAR0 res hdr not mem-mapped\n");
  64                 return -EINVAL;
  65         }
  66
  67         /* Check for mgmt vnic in addition to normal vnic */
  68         if ((ioread32(&rh->magic) != VNIC_RES_MAGIC) ||
  69                 (ioread32(&rh->version) != VNIC_RES_VERSION)) {
  70                 if ((ioread32(&mrh->magic) != MGMTVNIC_MAGIC) ||
  71                         (ioread32(&mrh->version) != MGMTVNIC_VERSION)) {
  72                         vdev_err(vdev, "vNIC BAR0 res magic/version error exp (%lx/%lx) or (%lx/%lx), curr (%x/%x)\n",
  73                                  VNIC_RES_MAGIC, VNIC_RES_VERSION,
  74                                  MGMTVNIC_MAGIC, MGMTVNIC_VERSION,
  75                                  ioread32(&rh->magic), ioread32(&rh->version));
  76                         return -EINVAL;
  77                 }
  78         }
  79
  80         if (ioread32(&mrh->magic) == MGMTVNIC_MAGIC)
  81                 r = (struct vnic_resource __iomem *)(mrh + 1);
  82         else
  83                 r = (struct vnic_resource __iomem *)(rh + 1);
  84
  85
  86         while ((type = ioread8(&r->type)) != RES_TYPE_EOL) {
  87
  88                 u8 bar_num = ioread8(&r->bar);
  89                 u32 bar_offset = ioread32(&r->bar_offset);
  90                 u32 count = ioread32(&r->count);
  91                 u32 len;
  92
  93                 r++;
  94
  95                 if (bar_num >= num_bars)
  96                         continue;
  97
  98                 if (!bar[bar_num].len || !bar[bar_num].vaddr)
  99                         continue;
 100
 101                 switch (type) {
 102                 case RES_TYPE_WQ:
 103                 case RES_TYPE_RQ:
 104                 case RES_TYPE_CQ:
 105                 case RES_TYPE_INTR_CTRL:
 106                         /* each count is stride bytes long */
 107                         len = count * VNIC_RES_STRIDE;
 108                         if (len + bar_offset > bar[bar_num].len) {
 109                                 vdev_err(vdev, "vNIC BAR0 resource %d out-of-bounds, offset 0x%x + size 0x%x > bar len 0x%lx\n",
 110                                          type, bar_offset, len,
 111                                          bar[bar_num].len);
 112                                 return -EINVAL;
 113                         }
 114                         break;
 115                 case RES_TYPE_INTR_PBA_LEGACY:
 116                 case RES_TYPE_DEVCMD:
 117                 case RES_TYPE_DEVCMD2:
 118                         len = count;
 119                         break;
 120                 default:
 121                         continue;
 122                 }
 123
 124                 vdev->res[type].count = count;
 125                 vdev->res[type].vaddr = (char __iomem *)bar[bar_num].vaddr +
 126                         bar_offset;
 127                 vdev->res[type].bus_addr = bar[bar_num].bus_addr + bar_offset;
 128         }
 129
 130         return 0;
 131 }
 132
 133 unsigned int vnic_dev_get_res_count(struct vnic_dev *vdev,
 134         enum vnic_res_type type)
 135 {
 136         return vdev->res[type].count;
 137 }
 138 EXPORT_SYMBOL(vnic_dev_get_res_count);
 139
 140 void __iomem *vnic_dev_get_res(struct vnic_dev *vdev, enum vnic_res_type type,
 141         unsigned int index)
 142 {
 143         if (!vdev->res[type].vaddr)
 144                 return NULL;
 145
 146         switch (type) {
 147         case RES_TYPE_WQ:
 148         case RES_TYPE_RQ:
 149         case RES_TYPE_CQ:
 150         case RES_TYPE_INTR_CTRL:
 151                 return (char __iomem *)vdev->res[type].vaddr +
 152                         index * VNIC_RES_STRIDE;
 153         default:
 154                 return (char __iomem *)vdev->res[type].vaddr;
 155         }
 156 }
 157 EXPORT_SYMBOL(vnic_dev_get_res);
 158
 159 static unsigned int vnic_dev_desc_ring_size(struct vnic_dev_ring *ring,
 160         unsigned int desc_count, unsigned int desc_size)
 161 {
 162         /* The base address of the desc rings must be 512 byte aligned.
 163          * Descriptor count is aligned to groups of 32 descriptors.  A
 164          * count of 0 means the maximum 4096 descriptors.  Descriptor
 165          * size is aligned to 16 bytes.
 166          */
 167
 168         unsigned int count_align = 32;
 169         unsigned int desc_align = 16;
 170
 171         ring->base_align = 512;
 172
 173         if (desc_count == 0)
 174                 desc_count = 4096;
 175
 176         ring->desc_count = ALIGN(desc_count, count_align);
 177
 178         ring->desc_size = ALIGN(desc_size, desc_align);
 179
 180         ring->size = ring->desc_count * ring->desc_size;
 181         ring->size_unaligned = ring->size + ring->base_align;
 182
 183         return ring->size_unaligned;
 184 }
 185
 186 void vnic_dev_clear_desc_ring(struct vnic_dev_ring *ring)
 187 {
 188         memset(ring->descs, 0, ring->size);
 189 }
 190
 191 int vnic_dev_alloc_desc_ring(struct vnic_dev *vdev, struct vnic_dev_ring *ring,
 192         unsigned int desc_count, unsigned int desc_size)
 193 {
 194         vnic_dev_desc_ring_size(ring, desc_count, desc_size);
 195
 196         ring->descs_unaligned = pci_alloc_consistent(vdev->pdev,
 197                 ring->size_unaligned,
 198                 &ring->base_addr_unaligned);
 199
 200         if (!ring->descs_unaligned) {
 201                 vdev_err(vdev, "Failed to allocate ring (size=%d), aborting\n",
 202                          (int)ring->size);
 203                 return -ENOMEM;
 204         }
 205
 206         ring->base_addr = ALIGN(ring->base_addr_unaligned,
 207                 ring->base_align);
 208         ring->descs = (u8 *)ring->descs_unaligned +
 209                 (ring->base_addr - ring->base_addr_unaligned);
 210
 211         vnic_dev_clear_desc_ring(ring);
 212
 213         ring->desc_avail = ring->desc_count - 1;
 214
 215         return 0;
 216 }
 217
 218 void vnic_dev_free_desc_ring(struct vnic_dev *vdev, struct vnic_dev_ring *ring)
 219 {
 220         if (ring->descs) {
 221                 pci_free_consistent(vdev->pdev,
 222                         ring->size_unaligned,
 223                         ring->descs_unaligned,
 224                         ring->base_addr_unaligned);
 225                 ring->descs = NULL;
 226         }
 227 }
 228
 229 static int _vnic_dev_cmd(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd,
 230         int wait)
 231 {
 232         struct vnic_devcmd __iomem *devcmd = vdev->devcmd;
 233         unsigned int i;
 234         int delay;
 235         u32 status;
 236         int err;
 237
 238         status = ioread32(&devcmd->status);
 239         if (status == 0xFFFFFFFF) {
 240                 /* PCI-e target device is gone */
 241                 return -ENODEV;
 242         }
 243         if (status & STAT_BUSY) {
 244                 vdev_neterr(vdev, "Busy devcmd %d\n", _CMD_N(cmd));
 245                 return -EBUSY;
 246         }
 247
 248         if (_CMD_DIR(cmd) & _CMD_DIR_WRITE) {
 249                 for (i = 0; i < VNIC_DEVCMD_NARGS; i++)
 250                         writeq(vdev->args[i], &devcmd->args[i]);
 251                 wmb();
 252         }
 253
 254         iowrite32(cmd, &devcmd->cmd);
 255
 256         if ((_CMD_FLAGS(cmd) & _CMD_FLAGS_NOWAIT))
 257                 return 0;
 258
 259         for (delay = 0; delay < wait; delay++) {
 260
 261                 udelay(100);
 262
 263                 status = ioread32(&devcmd->status);
 264                 if (status == 0xFFFFFFFF) {
 265                         /* PCI-e target device is gone */
 266                         return -ENODEV;
 267                 }
 268
 269                 if (!(status & STAT_BUSY)) {
 270
 271                         if (status & STAT_ERROR) {
 272                                 err = (int)readq(&devcmd->args[0]);
 273                                 if (err == ERR_EINVAL &&
 274                                     cmd == CMD_CAPABILITY)
 275                                         return -err;
 276                                 if (err != ERR_ECMDUNKNOWN ||
 277                                     cmd != CMD_CAPABILITY)
 278                                         vdev_neterr(vdev, "Error %d devcmd %d\n",
 279                                                     err, _CMD_N(cmd));
 280                                 return -err;
 281                         }
 282
 283                         if (_CMD_DIR(cmd) & _CMD_DIR_READ) {
 284                                 rmb();
 285                                 for (i = 0; i < VNIC_DEVCMD_NARGS; i++)
 286                                         vdev->args[i] = readq(&devcmd->args[i]);
 287                         }
 288
 289                         return 0;
 290                 }
 291         }
 292
 293         vdev_neterr(vdev, "Timedout devcmd %d\n", _CMD_N(cmd));
 294         return -ETIMEDOUT;
 295 }
 296
 297 static int _vnic_dev_cmd2(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd,
 298                           int wait)
 299 {
 300         struct devcmd2_controller *dc2c = vdev->devcmd2;
 301         struct devcmd2_result *result;
 302         u8 color;
 303         unsigned int i;
 304         int delay, err;
 305         u32 fetch_index, new_posted;
 306         u32 posted = dc2c->posted;
 307
 308         fetch_index = ioread32(&dc2c->wq_ctrl->fetch_index);
 309
 310         if (fetch_index == 0xFFFFFFFF)
 311                 return -ENODEV;
 312
 313         new_posted = (posted + 1) % DEVCMD2_RING_SIZE;
 314
 315         if (new_posted == fetch_index) {
 316                 vdev_neterr(vdev, "devcmd2 %d: wq is full. fetch index: %u, posted index: %u\n",
 317                             _CMD_N(cmd), fetch_index, posted);
 318                 return -EBUSY;
 319         }
 320         dc2c->cmd_ring[posted].cmd = cmd;
 321         dc2c->cmd_ring[posted].flags = 0;
 322
 323         if ((_CMD_FLAGS(cmd) & _CMD_FLAGS_NOWAIT))
 324                 dc2c->cmd_ring[posted].flags |= DEVCMD2_FNORESULT;
 325         if (_CMD_DIR(cmd) & _CMD_DIR_WRITE)
 326                 for (i = 0; i < VNIC_DEVCMD_NARGS; i++)
 327                         dc2c->cmd_ring[posted].args[i] = vdev->args[i];
 328
 329         /* Adding write memory barrier prevents compiler and/or CPU reordering,
 330          * thus avoiding descriptor posting before descriptor is initialized.
 331          * Otherwise, hardware can read stale descriptor fields.
 332          */
 333         wmb();
 334         iowrite32(new_posted, &dc2c->wq_ctrl->posted_index);
 335         dc2c->posted = new_posted;
 336
 337         if (dc2c->cmd_ring[posted].flags & DEVCMD2_FNORESULT)
 338                 return 0;
 339
 340         result = dc2c->result + dc2c->next_result;
 341         color = dc2c->color;
 342
 343         dc2c->next_result++;
 344         if (dc2c->next_result == dc2c->result_size) {
 345                 dc2c->next_result = 0;
 346                 dc2c->color = dc2c->color ? 0 : 1;
 347         }
 348
 349         for (delay = 0; delay < wait; delay++) {
 350                 if (result->color == color) {
 351                         if (result->error) {
 352                                 err = result->error;
 353                                 if (err != ERR_ECMDUNKNOWN ||
 354                                     cmd != CMD_CAPABILITY)
 355                                         vdev_neterr(vdev, "Error %d devcmd %d\n",
 356                                                     err, _CMD_N(cmd));
 357                                 return -err;
 358                         }
 359                         if (_CMD_DIR(cmd) & _CMD_DIR_READ)
 360                                 for (i = 0; i < VNIC_DEVCMD2_NARGS; i++)
 361                                         vdev->args[i] = result->results[i];
 362
 363                         return 0;
 364                 }
 365                 udelay(100);
 366         }
 367
 368         vdev_neterr(vdev, "devcmd %d timed out\n", _CMD_N(cmd));
 369
 370         return -ETIMEDOUT;
 371 }
 372
 373 static int vnic_dev_init_devcmd1(struct vnic_dev *vdev)
 374 {
 375         vdev->devcmd = vnic_dev_get_res(vdev, RES_TYPE_DEVCMD, 0);
 376         if (!vdev->devcmd)
 377                 return -ENODEV;
 378         vdev->devcmd_rtn = _vnic_dev_cmd;
 379
 380         return 0;
 381 }
 382
 383 static int vnic_dev_init_devcmd2(struct vnic_dev *vdev)
 384 {
 385         int err;
 386         unsigned int fetch_index;
 387
 388         if (vdev->devcmd2)
 389                 return 0;
 390
 391         vdev->devcmd2 = kzalloc(sizeof(*vdev->devcmd2), GFP_KERNEL);
 392         if (!vdev->devcmd2)
 393                 return -ENOMEM;
 394
 395         vdev->devcmd2->color = 1;
 396         vdev->devcmd2->result_size = DEVCMD2_RING_SIZE;
 397         err = enic_wq_devcmd2_alloc(vdev, &vdev->devcmd2->wq, DEVCMD2_RING_SIZE,
 398                                     DEVCMD2_DESC_SIZE);
 399         if (err)
 400                 goto err_free_devcmd2;
 401
 402         fetch_index = ioread32(&vdev->devcmd2->wq.ctrl->fetch_index);
 403         if (fetch_index == 0xFFFFFFFF) { /* check for hardware gone  */
 404                 vdev_err(vdev, "Fatal error in devcmd2 init - hardware surprise removal\n");
 405                 err = -ENODEV;
 406                 goto err_free_wq;
 407         }
 408
 409         enic_wq_init_start(&vdev->devcmd2->wq, 0, fetch_index, fetch_index, 0,
 410                            0);
 411         vdev->devcmd2->posted = fetch_index;
 412         vnic_wq_enable(&vdev->devcmd2->wq);
 413
 414         err = vnic_dev_alloc_desc_ring(vdev, &vdev->devcmd2->results_ring,
 415                                        DEVCMD2_RING_SIZE, DEVCMD2_DESC_SIZE);
 416         if (err)
 417                 goto err_disable_wq;
 418
 419         vdev->devcmd2->result = vdev->devcmd2->results_ring.descs;
 420         vdev->devcmd2->cmd_ring = vdev->devcmd2->wq.ring.descs;
 421         vdev->devcmd2->wq_ctrl = vdev->devcmd2->wq.ctrl;
 422         vdev->args[0] = (u64)vdev->devcmd2->results_ring.base_addr |
 423                         VNIC_PADDR_TARGET;
 424         vdev->args[1] = DEVCMD2_RING_SIZE;
 425
 426         err = _vnic_dev_cmd2(vdev, CMD_INITIALIZE_DEVCMD2, 1000);
 427         if (err)
 428                 goto err_free_desc_ring;
 429
 430         vdev->devcmd_rtn = _vnic_dev_cmd2;
 431
 432         return 0;
 433
 434 err_free_desc_ring:
 435         vnic_dev_free_desc_ring(vdev, &vdev->devcmd2->results_ring);
 436 err_disable_wq:
 437         vnic_wq_disable(&vdev->devcmd2->wq);
 438 err_free_wq:
 439         vnic_wq_free(&vdev->devcmd2->wq);
 440 err_free_devcmd2:
 441         kfree(vdev->devcmd2);
 442         vdev->devcmd2 = NULL;
 443
 444         return err;
 445 }
 446
 447 static void vnic_dev_deinit_devcmd2(struct vnic_dev *vdev)
 448 {
 449         vnic_dev_free_desc_ring(vdev, &vdev->devcmd2->results_ring);
 450         vnic_wq_disable(&vdev->devcmd2->wq);
 451         vnic_wq_free(&vdev->devcmd2->wq);
 452         kfree(vdev->devcmd2);
 453 }
 454
 455 static int vnic_dev_cmd_proxy(struct vnic_dev *vdev,
 456         enum vnic_devcmd_cmd proxy_cmd, enum vnic_devcmd_cmd cmd,
 457         u64 *a0, u64 *a1, int wait)
 458 {
 459         u32 status;
 460         int err;
 461
 462         memset(vdev->args, 0, sizeof(vdev->args));
 463
 464         vdev->args[0] = vdev->proxy_index;
 465         vdev->args[1] = cmd;
 466         vdev->args[2] = *a0;
 467         vdev->args[3] = *a1;
 468
 469         err = vdev->devcmd_rtn(vdev, proxy_cmd, wait);
 470         if (err)
 471                 return err;
 472
 473         status = (u32)vdev->args[0];
 474         if (status & STAT_ERROR) {
 475                 err = (int)vdev->args[1];
 476                 if (err != ERR_ECMDUNKNOWN ||
 477                     cmd != CMD_CAPABILITY)
 478                         vdev_neterr(vdev, "Error %d proxy devcmd %d\n",
 479                                     err, _CMD_N(cmd));
 480                 return err;
 481         }
 482
 483         *a0 = vdev->args[1];
 484         *a1 = vdev->args[2];
 485
 486         return 0;
 487 }
 488
 489 static int vnic_dev_cmd_no_proxy(struct vnic_dev *vdev,
 490         enum vnic_devcmd_cmd cmd, u64 *a0, u64 *a1, int wait)
 491 {
 492         int err;
 493
 494         vdev->args[0] = *a0;
 495         vdev->args[1] = *a1;
 496
 497         err = vdev->devcmd_rtn(vdev, cmd, wait);
 498
 499         *a0 = vdev->args[0];
 500         *a1 = vdev->args[1];
 501
 502         return err;
 503 }
 504
 505 void vnic_dev_cmd_proxy_by_index_start(struct vnic_dev *vdev, u16 index)
 506 {
 507         vdev->proxy = PROXY_BY_INDEX;
 508         vdev->proxy_index = index;
 509 }
 510
 511 void vnic_dev_cmd_proxy_end(struct vnic_dev *vdev)
 512 {
 513         vdev->proxy = PROXY_NONE;
 514         vdev->proxy_index = 0;
 515 }
 516
 517 int vnic_dev_cmd(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd,
 518         u64 *a0, u64 *a1, int wait)
 519 {
 520         memset(vdev->args, 0, sizeof(vdev->args));
 521
 522         switch (vdev->proxy) {
 523         case PROXY_BY_INDEX:
 524                 return vnic_dev_cmd_proxy(vdev, CMD_PROXY_BY_INDEX, cmd,
 525                                 a0, a1, wait);
 526         case PROXY_BY_BDF:
 527                 return vnic_dev_cmd_proxy(vdev, CMD_PROXY_BY_BDF, cmd,
 528                                 a0, a1, wait);
 529         case PROXY_NONE:
 530         default:
 531                 return vnic_dev_cmd_no_proxy(vdev, cmd, a0, a1, wait);
 532         }
 533 }
 534
 535 static int vnic_dev_capable(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd)
 536 {
 537         u64 a0 = (u32)cmd, a1 = 0;
 538         int wait = 1000;
 539         int err;
 540
 541         err = vnic_dev_cmd(vdev, CMD_CAPABILITY, &a0, &a1, wait);
 542
 543         return !(err || a0);
 544 }
 545
 546 int vnic_dev_fw_info(struct vnic_dev *vdev,
 547         struct vnic_devcmd_fw_info **fw_info)
 548 {
 549         u64 a0, a1 = 0;
 550         int wait = 1000;
 551         int err = 0;
 552
 553         if (!vdev->fw_info) {
 554                 vdev->fw_info = pci_zalloc_consistent(vdev->pdev,
 555                                                       sizeof(struct vnic_devcmd_fw_info),
 556                                                       &vdev->fw_info_pa);
 557                 if (!vdev->fw_info)
 558                         return -ENOMEM;
 559
 560                 a0 = vdev->fw_info_pa;
 561                 a1 = sizeof(struct vnic_devcmd_fw_info);
 562
 563                 /* only get fw_info once and cache it */
 564                 if (vnic_dev_capable(vdev, CMD_MCPU_FW_INFO))
 565                         err = vnic_dev_cmd(vdev, CMD_MCPU_FW_INFO,
 566                                 &a0, &a1, wait);
 567                 else
 568                         err = vnic_dev_cmd(vdev, CMD_MCPU_FW_INFO_OLD,
 569                                 &a0, &a1, wait);
 570         }
 571
 572         *fw_info = vdev->fw_info;
 573
 574         return err;
 575 }
 576
 577 int vnic_dev_spec(struct vnic_dev *vdev, unsigned int offset, unsigned int size,
 578         void *value)
 579 {
 580         u64 a0, a1;
 581         int wait = 1000;
 582         int err;
 583
 584         a0 = offset;
 585         a1 = size;
 586
 587         err = vnic_dev_cmd(vdev, CMD_DEV_SPEC, &a0, &a1, wait);
 588
 589         switch (size) {
 590         case 1: *(u8 *)value = (u8)a0; break;
 591         case 2: *(u16 *)value = (u16)a0; break;
 592         case 4: *(u32 *)value = (u32)a0; break;
 593         case 8: *(u64 *)value = a0; break;
 594         default: BUG(); break;
 595         }
 596
 597         return err;
 598 }
 599
 600 int vnic_dev_stats_dump(struct vnic_dev *vdev, struct vnic_stats **stats)
 601 {
 602         u64 a0, a1;
 603         int wait = 1000;
 604
 605         if (!vdev->stats) {
 606                 vdev->stats = pci_alloc_consistent(vdev->pdev,
 607                         sizeof(struct vnic_stats), &vdev->stats_pa);
 608                 if (!vdev->stats)
 609                         return -ENOMEM;
 610         }
 611
 612         *stats = vdev->stats;
 613         a0 = vdev->stats_pa;
 614         a1 = sizeof(struct vnic_stats);
 615
 616         return vnic_dev_cmd(vdev, CMD_STATS_DUMP, &a0, &a1, wait);
 617 }
 618
 619 int vnic_dev_close(struct vnic_dev *vdev)
 620 {
 621         u64 a0 = 0, a1 = 0;
 622         int wait = 1000;
 623         return vnic_dev_cmd(vdev, CMD_CLOSE, &a0, &a1, wait);
 624 }
 625
 626 int vnic_dev_enable_wait(struct vnic_dev *vdev)
 627 {
 628         u64 a0 = 0, a1 = 0;
 629         int wait = 1000;
 630
 631         if (vnic_dev_capable(vdev, CMD_ENABLE_WAIT))
 632                 return vnic_dev_cmd(vdev, CMD_ENABLE_WAIT, &a0, &a1, wait);
 633         else
 634                 return vnic_dev_cmd(vdev, CMD_ENABLE, &a0, &a1, wait);
 635 }
 636
 637 int vnic_dev_disable(struct vnic_dev *vdev)
 638 {
 639         u64 a0 = 0, a1 = 0;
 640         int wait = 1000;
 641         return vnic_dev_cmd(vdev, CMD_DISABLE, &a0, &a1, wait);
 642 }
 643
 644 int vnic_dev_open(struct vnic_dev *vdev, int arg)
 645 {
 646         u64 a0 = (u32)arg, a1 = 0;
 647         int wait = 1000;
 648         return vnic_dev_cmd(vdev, CMD_OPEN, &a0, &a1, wait);
 649 }
 650
 651 int vnic_dev_open_done(struct vnic_dev *vdev, int *done)
 652 {
 653         u64 a0 = 0, a1 = 0;
 654         int wait = 1000;
 655         int err;
 656
 657         *done = 0;
 658
 659         err = vnic_dev_cmd(vdev, CMD_OPEN_STATUS, &a0, &a1, wait);
 660         if (err)
 661                 return err;
 662
 663         *done = (a0 == 0);
 664
 665         return 0;
 666 }
 667
 668 int vnic_dev_soft_reset(struct vnic_dev *vdev, int arg)
 669 {
 670         u64 a0 = (u32)arg, a1 = 0;
 671         int wait = 1000;
 672         return vnic_dev_cmd(vdev, CMD_SOFT_RESET, &a0, &a1, wait);
 673 }
 674
 675 int vnic_dev_soft_reset_done(struct vnic_dev *vdev, int *done)
 676 {
 677         u64 a0 = 0, a1 = 0;
 678         int wait = 1000;
 679         int err;
 680
 681         *done = 0;
 682
 683         err = vnic_dev_cmd(vdev, CMD_SOFT_RESET_STATUS, &a0, &a1, wait);
 684         if (err)
 685                 return err;
 686
 687         *done = (a0 == 0);
 688
 689         return 0;
 690 }
 691
 692 int vnic_dev_hang_reset(struct vnic_dev *vdev, int arg)
 693 {
 694         u64 a0 = (u32)arg, a1 = 0;
 695         int wait = 1000;
 696         int err;
 697
 698         if (vnic_dev_capable(vdev, CMD_HANG_RESET)) {
 699                 return vnic_dev_cmd(vdev, CMD_HANG_RESET,
 700                                 &a0, &a1, wait);
 701         } else {
 702                 err = vnic_dev_soft_reset(vdev, arg);
 703                 if (err)
 704                         return err;
 705                 return vnic_dev_init(vdev, 0);
 706         }
 707 }
 708
 709 int vnic_dev_hang_reset_done(struct vnic_dev *vdev, int *done)
 710 {
 711         u64 a0 = 0, a1 = 0;
 712         int wait = 1000;
 713         int err;
 714
 715         *done = 0;
 716
 717         if (vnic_dev_capable(vdev, CMD_HANG_RESET_STATUS)) {
 718                 err = vnic_dev_cmd(vdev, CMD_HANG_RESET_STATUS,
 719                                 &a0, &a1, wait);
 720                 if (err)
 721                         return err;
 722         } else {
 723                 return vnic_dev_soft_reset_done(vdev, done);
 724         }
 725
 726         *done = (a0 == 0);
 727
 728         return 0;
 729 }
 730
 731 int vnic_dev_hang_notify(struct vnic_dev *vdev)
 732 {
 733         u64 a0, a1;
 734         int wait = 1000;
 735         return vnic_dev_cmd(vdev, CMD_HANG_NOTIFY, &a0, &a1, wait);
 736 }
 737
 738 int vnic_dev_get_mac_addr(struct vnic_dev *vdev, u8 *mac_addr)
 739 {
 740         u64 a0, a1;
 741         int wait = 1000;
 742         int err, i;
 743
 744         for (i = 0; i < ETH_ALEN; i++)
 745                 mac_addr[i] = 0;
 746
 747         err = vnic_dev_cmd(vdev, CMD_GET_MAC_ADDR, &a0, &a1, wait);
 748         if (err)
 749                 return err;
 750
 751         for (i = 0; i < ETH_ALEN; i++)
 752                 mac_addr[i] = ((u8 *)&a0)[i];
 753
 754         return 0;
 755 }
 756
 757 int vnic_dev_packet_filter(struct vnic_dev *vdev, int directed, int multicast,
 758         int broadcast, int promisc, int allmulti)
 759 {
 760         u64 a0, a1 = 0;
 761         int wait = 1000;
 762         int err;
 763
 764         a0 = (directed ? CMD_PFILTER_DIRECTED : 0) |
 765              (multicast ? CMD_PFILTER_MULTICAST : 0) |
 766              (broadcast ? CMD_PFILTER_BROADCAST : 0) |
 767              (promisc ? CMD_PFILTER_PROMISCUOUS : 0) |
 768              (allmulti ? CMD_PFILTER_ALL_MULTICAST : 0);
 769
 770         err = vnic_dev_cmd(vdev, CMD_PACKET_FILTER, &a0, &a1, wait);
 771         if (err)
 772                 vdev_neterr(vdev, "Can't set packet filter\n");
 773
 774         return err;
 775 }
 776
 777 int vnic_dev_add_addr(struct vnic_dev *vdev, const u8 *addr)
 778 {
 779         u64 a0 = 0, a1 = 0;
 780         int wait = 1000;
 781         int err;
 782         int i;
 783
 784         for (i = 0; i < ETH_ALEN; i++)
 785                 ((u8 *)&a0)[i] = addr[i];
 786
 787         err = vnic_dev_cmd(vdev, CMD_ADDR_ADD, &a0, &a1, wait);
 788         if (err)
 789                 vdev_neterr(vdev, "Can't add addr [%pM], %d\n", addr, err);
 790
 791         return err;
 792 }
 793
 794 int vnic_dev_del_addr(struct vnic_dev *vdev, const u8 *addr)
 795 {
 796         u64 a0 = 0, a1 = 0;
 797         int wait = 1000;
 798         int err;
 799         int i;
 800
 801         for (i = 0; i < ETH_ALEN; i++)
 802                 ((u8 *)&a0)[i] = addr[i];
 803
 804         err = vnic_dev_cmd(vdev, CMD_ADDR_DEL, &a0, &a1, wait);
 805         if (err)
 806                 vdev_neterr(vdev, "Can't del addr [%pM], %d\n", addr, err);
 807
 808         return err;
 809 }
 810
 811 int vnic_dev_set_ig_vlan_rewrite_mode(struct vnic_dev *vdev,
 812         u8 ig_vlan_rewrite_mode)
 813 {
 814         u64 a0 = ig_vlan_rewrite_mode, a1 = 0;
 815         int wait = 1000;
 816
 817         if (vnic_dev_capable(vdev, CMD_IG_VLAN_REWRITE_MODE))
 818                 return vnic_dev_cmd(vdev, CMD_IG_VLAN_REWRITE_MODE,
 819                                 &a0, &a1, wait);
 820         else
 821                 return 0;
 822 }
 823
 824 static int vnic_dev_notify_setcmd(struct vnic_dev *vdev,
 825         void *notify_addr, dma_addr_t notify_pa, u16 intr)
 826 {
 827         u64 a0, a1;
 828         int wait = 1000;
 829         int r;
 830
 831         memset(notify_addr, 0, sizeof(struct vnic_devcmd_notify));
 832         vdev->notify = notify_addr;
 833         vdev->notify_pa = notify_pa;
 834
 835         a0 = (u64)notify_pa;
 836         a1 = ((u64)intr << 32) & 0x0000ffff00000000ULL;
 837         a1 += sizeof(struct vnic_devcmd_notify);
 838
 839         r = vnic_dev_cmd(vdev, CMD_NOTIFY, &a0, &a1, wait);
 840         vdev->notify_sz = (r == 0) ? (u32)a1 : 0;
 841         return r;
 842 }
 843
 844 int vnic_dev_notify_set(struct vnic_dev *vdev, u16 intr)
 845 {
 846         void *notify_addr;
 847         dma_addr_t notify_pa;
 848
 849         if (vdev->notify || vdev->notify_pa) {
 850                 vdev_neterr(vdev, "notify block %p still allocated\n",
 851                             vdev->notify);
 852                 return -EINVAL;
 853         }
 854
 855         notify_addr = pci_alloc_consistent(vdev->pdev,
 856                         sizeof(struct vnic_devcmd_notify),
 857                         &notify_pa);
 858         if (!notify_addr)
 859                 return -ENOMEM;
 860
 861         return vnic_dev_notify_setcmd(vdev, notify_addr, notify_pa, intr);
 862 }
 863
 864 static int vnic_dev_notify_unsetcmd(struct vnic_dev *vdev)
 865 {
 866         u64 a0, a1;
 867         int wait = 1000;
 868         int err;
 869
 870         a0 = 0;  /* paddr = 0 to unset notify buffer */
 871         a1 = 0x0000ffff00000000ULL; /* intr num = -1 to unreg for intr */
 872         a1 += sizeof(struct vnic_devcmd_notify);
 873
 874         err = vnic_dev_cmd(vdev, CMD_NOTIFY, &a0, &a1, wait);
 875         vdev->notify = NULL;
 876         vdev->notify_pa = 0;
 877         vdev->notify_sz = 0;
 878
 879         return err;
 880 }
 881
 882 int vnic_dev_notify_unset(struct vnic_dev *vdev)
 883 {
 884         if (vdev->notify) {
 885                 pci_free_consistent(vdev->pdev,
 886                         sizeof(struct vnic_devcmd_notify),
 887                         vdev->notify,
 888                         vdev->notify_pa);
 889         }
 890
 891         return vnic_dev_notify_unsetcmd(vdev);
 892 }
 893
 894 static int vnic_dev_notify_ready(struct vnic_dev *vdev)
 895 {
 896         u32 *words;
 897         unsigned int nwords = vdev->notify_sz / 4;
 898         unsigned int i;
 899         u32 csum;
 900
 901         if (!vdev->notify || !vdev->notify_sz)
 902                 return 0;
 903
 904         do {
 905                 csum = 0;
 906                 memcpy(&vdev->notify_copy, vdev->notify, vdev->notify_sz);
 907                 words = (u32 *)&vdev->notify_copy;
 908                 for (i = 1; i < nwords; i++)
 909                         csum += words[i];
 910         } while (csum != words[0]);
 911
 912         return 1;
 913 }
 914
 915 int vnic_dev_init(struct vnic_dev *vdev, int arg)
 916 {
 917         u64 a0 = (u32)arg, a1 = 0;
 918         int wait = 1000;
 919         int r = 0;
 920
 921         if (vnic_dev_capable(vdev, CMD_INIT))
 922                 r = vnic_dev_cmd(vdev, CMD_INIT, &a0, &a1, wait);
 923         else {
 924                 vnic_dev_cmd(vdev, CMD_INIT_v1, &a0, &a1, wait);
 925                 if (a0 & CMD_INITF_DEFAULT_MAC) {
 926                         /* Emulate these for old CMD_INIT_v1 which
 927                          * didn't pass a0 so no CMD_INITF_*.
 928                          */
 929                         vnic_dev_cmd(vdev, CMD_GET_MAC_ADDR, &a0, &a1, wait);
 930                         vnic_dev_cmd(vdev, CMD_ADDR_ADD, &a0, &a1, wait);
 931                 }
 932         }
 933         return r;
 934 }
 935
 936 int vnic_dev_deinit(struct vnic_dev *vdev)
 937 {
 938         u64 a0 = 0, a1 = 0;
 939         int wait = 1000;
 940
 941         return vnic_dev_cmd(vdev, CMD_DEINIT, &a0, &a1, wait);
 942 }
 943
 944 void vnic_dev_intr_coal_timer_info_default(struct vnic_dev *vdev)
 945 {
 946         /* Default: hardware intr coal timer is in units of 1.5 usecs */
 947         vdev->intr_coal_timer_info.mul = 2;
 948         vdev->intr_coal_timer_info.div = 3;
 949         vdev->intr_coal_timer_info.max_usec =
 950                 vnic_dev_intr_coal_timer_hw_to_usec(vdev, 0xffff);
 951 }
 952
 953 int vnic_dev_intr_coal_timer_info(struct vnic_dev *vdev)
 954 {
 955         int wait = 1000;
 956         int err;
 957
 958         memset(vdev->args, 0, sizeof(vdev->args));
 959
 960         if (vnic_dev_capable(vdev, CMD_INTR_COAL_CONVERT))
 961                 err = vdev->devcmd_rtn(vdev, CMD_INTR_COAL_CONVERT, wait);
 962         else
 963                 err = ERR_ECMDUNKNOWN;
 964
 965         /* Use defaults when firmware doesn't support the devcmd at all or
 966          * supports it for only specific hardware
 967          */
 968         if ((err == ERR_ECMDUNKNOWN) ||
 969                 (!err && !(vdev->args[0] && vdev->args[1] && vdev->args[2]))) {
 970                 vdev_netwarn(vdev, "Using default conversion factor for interrupt coalesce timer\n");
 971                 vnic_dev_intr_coal_timer_info_default(vdev);
 972                 return 0;
 973         }
 974
 975         if (!err) {
 976                 vdev->intr_coal_timer_info.mul = (u32) vdev->args[0];
 977                 vdev->intr_coal_timer_info.div = (u32) vdev->args[1];
 978                 vdev->intr_coal_timer_info.max_usec = (u32) vdev->args[2];
 979         }
 980
 981         return err;
 982 }
 983
 984 int vnic_dev_link_status(struct vnic_dev *vdev)
 985 {
 986         if (!vnic_dev_notify_ready(vdev))
 987                 return 0;
 988
 989         return vdev->notify_copy.link_state;
 990 }
 991
 992 u32 vnic_dev_port_speed(struct vnic_dev *vdev)
 993 {
 994         if (!vnic_dev_notify_ready(vdev))
 995                 return 0;
 996
 997         return vdev->notify_copy.port_speed;
 998 }
 999
1000 u32 vnic_dev_msg_lvl(struct vnic_dev *vdev)
1001 {
1002         if (!vnic_dev_notify_ready(vdev))
1003                 return 0;
1004
1005         return vdev->notify_copy.msglvl;
1006 }
1007
1008 u32 vnic_dev_mtu(struct vnic_dev *vdev)
1009 {
1010         if (!vnic_dev_notify_ready(vdev))
1011                 return 0;
1012
1013         return vdev->notify_copy.mtu;
1014 }
1015
1016 void vnic_dev_set_intr_mode(struct vnic_dev *vdev,
1017         enum vnic_dev_intr_mode intr_mode)
1018 {
1019         vdev->intr_mode = intr_mode;
1020 }
1021
1022 enum vnic_dev_intr_mode vnic_dev_get_intr_mode(
1023         struct vnic_dev *vdev)
1024 {
1025         return vdev->intr_mode;
1026 }
1027
1028 u32 vnic_dev_intr_coal_timer_usec_to_hw(struct vnic_dev *vdev, u32 usec)
1029 {
1030         return (usec * vdev->intr_coal_timer_info.mul) /
1031                 vdev->intr_coal_timer_info.div;
1032 }
1033
1034 u32 vnic_dev_intr_coal_timer_hw_to_usec(struct vnic_dev *vdev, u32 hw_cycles)
1035 {
1036         return (hw_cycles * vdev->intr_coal_timer_info.div) /
1037                 vdev->intr_coal_timer_info.mul;
1038 }
1039
1040 u32 vnic_dev_get_intr_coal_timer_max(struct vnic_dev *vdev)
1041 {
1042         return vdev->intr_coal_timer_info.max_usec;
1043 }
1044
1045 void vnic_dev_unregister(struct vnic_dev *vdev)
1046 {
1047         if (vdev) {
1048                 if (vdev->notify)
1049                         pci_free_consistent(vdev->pdev,
1050                                 sizeof(struct vnic_devcmd_notify),
1051                                 vdev->notify,
1052                                 vdev->notify_pa);
1053                 if (vdev->stats)
1054                         pci_free_consistent(vdev->pdev,
1055                                 sizeof(struct vnic_stats),
1056                                 vdev->stats, vdev->stats_pa);
1057                 if (vdev->fw_info)
1058                         pci_free_consistent(vdev->pdev,
1059                                 sizeof(struct vnic_devcmd_fw_info),
1060                                 vdev->fw_info, vdev->fw_info_pa);
1061                 if (vdev->devcmd2)
1062                         vnic_dev_deinit_devcmd2(vdev);
1063
1064                 kfree(vdev);
1065         }
1066 }
1067 EXPORT_SYMBOL(vnic_dev_unregister);
1068
1069 struct vnic_dev *vnic_dev_register(struct vnic_dev *vdev,
1070         void *priv, struct pci_dev *pdev, struct vnic_dev_bar *bar,
1071         unsigned int num_bars)
1072 {
1073         if (!vdev) {
1074                 vdev = kzalloc(sizeof(struct vnic_dev), GFP_KERNEL);
1075                 if (!vdev)
1076                         return NULL;
1077         }
1078
1079         vdev->priv = priv;
1080         vdev->pdev = pdev;
1081
1082         if (vnic_dev_discover_res(vdev, bar, num_bars))
1083                 goto err_out;
1084
1085         return vdev;
1086
1087 err_out:
1088         vnic_dev_unregister(vdev);
1089         return NULL;
1090 }
1091 EXPORT_SYMBOL(vnic_dev_register);
1092
1093 struct pci_dev *vnic_dev_get_pdev(struct vnic_dev *vdev)
1094 {
1095         return vdev->pdev;
1096 }
1097 EXPORT_SYMBOL(vnic_dev_get_pdev);
1098
1099 int vnic_devcmd_init(struct vnic_dev *vdev)
1100 {
1101         void __iomem *res;
1102         int err;
1103
1104         res = vnic_dev_get_res(vdev, RES_TYPE_DEVCMD2, 0);
1105         if (res) {
1106                 err = vnic_dev_init_devcmd2(vdev);
1107                 if (err)
1108                         vdev_warn(vdev, "DEVCMD2 init failed: %d, Using DEVCMD1\n",
1109                                   err);
1110                 else
1111                         return 0;
1112         } else {
1113                 vdev_warn(vdev, "DEVCMD2 resource not found (old firmware?) Using DEVCMD1\n");
1114         }
1115         err = vnic_dev_init_devcmd1(vdev);
1116         if (err)
1117                 vdev_err(vdev, "DEVCMD1 initialization failed: %d\n", err);
1118
1119         return err;
1120 }
1121
1122 int vnic_dev_init_prov2(struct vnic_dev *vdev, u8 *buf, u32 len)
1123 {
1124         u64 a0, a1 = len;
1125         int wait = 1000;
1126         dma_addr_t prov_pa;
1127         void *prov_buf;
1128         int ret;
1129
1130         prov_buf = pci_alloc_consistent(vdev->pdev, len, &prov_pa);
1131         if (!prov_buf)
1132                 return -ENOMEM;
1133
1134         memcpy(prov_buf, buf, len);
1135
1136         a0 = prov_pa;
1137
1138         ret = vnic_dev_cmd(vdev, CMD_INIT_PROV_INFO2, &a0, &a1, wait);
1139
1140         pci_free_consistent(vdev->pdev, len, prov_buf, prov_pa);
1141
1142         return ret;
1143 }
1144
1145 int vnic_dev_enable2(struct vnic_dev *vdev, int active)
1146 {
1147         u64 a0, a1 = 0;
1148         int wait = 1000;
1149
1150         a0 = (active ? CMD_ENABLE2_ACTIVE : 0);
1151
1152         return vnic_dev_cmd(vdev, CMD_ENABLE2, &a0, &a1, wait);
1153 }
1154
1155 static int vnic_dev_cmd_status(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd,
1156         int *status)
1157 {
1158         u64 a0 = cmd, a1 = 0;
1159         int wait = 1000;
1160         int ret;
1161
1162         ret = vnic_dev_cmd(vdev, CMD_STATUS, &a0, &a1, wait);
1163         if (!ret)
1164                 *status = (int)a0;
1165
1166         return ret;
1167 }
1168
1169 int vnic_dev_enable2_done(struct vnic_dev *vdev, int *status)
1170 {
1171         return vnic_dev_cmd_status(vdev, CMD_ENABLE2, status);
1172 }
1173
1174 int vnic_dev_deinit_done(struct vnic_dev *vdev, int *status)
1175 {
1176         return vnic_dev_cmd_status(vdev, CMD_DEINIT, status);
1177 }
1178
1179 int vnic_dev_set_mac_addr(struct vnic_dev *vdev, u8 *mac_addr)
1180 {
1181         u64 a0, a1;
1182         int wait = 1000;
1183         int i;
1184
1185         for (i = 0; i < ETH_ALEN; i++)
1186                 ((u8 *)&a0)[i] = mac_addr[i];
1187
1188         return vnic_dev_cmd(vdev, CMD_SET_MAC_ADDR, &a0, &a1, wait);
1189 }
1190
1191 /* vnic_dev_classifier: Add/Delete classifier entries
1192  * @vdev: vdev of the device
1193  * @cmd: CLSF_ADD for Add filter
1194  *       CLSF_DEL for Delete filter
1195  * @entry: In case of ADD filter, the caller passes the RQ number in this
1196  *         variable.
1197  *
1198  *         This function stores the filter_id returned by the firmware in the
1199  *         same variable before return;
1200  *
1201  *         In case of DEL filter, the caller passes the RQ number. Return
1202  *         value is irrelevant.
1203  * @data: filter data
1204  */
1205 int vnic_dev_classifier(struct vnic_dev *vdev, u8 cmd, u16 *entry,
1206                         struct filter *data)
1207 {
1208         u64 a0, a1;
1209         int wait = 1000;
1210         dma_addr_t tlv_pa;
1211         int ret = -EINVAL;
1212         struct filter_tlv *tlv, *tlv_va;
1213         struct filter_action *action;
1214         u64 tlv_size;
1215
1216         if (cmd == CLSF_ADD) {
1217                 tlv_size = sizeof(struct filter) +
1218                            sizeof(struct filter_action) +
1219                            2 * sizeof(struct filter_tlv);
1220                 tlv_va = pci_alloc_consistent(vdev->pdev, tlv_size, &tlv_pa);
1221                 if (!tlv_va)
1222                         return -ENOMEM;
1223                 tlv = tlv_va;
1224                 a0 = tlv_pa;
1225                 a1 = tlv_size;
1226                 memset(tlv, 0, tlv_size);
1227                 tlv->type = CLSF_TLV_FILTER;
1228                 tlv->length = sizeof(struct filter);
1229                 *(struct filter *)&tlv->val = *data;
1230
1231                 tlv = (struct filter_tlv *)((char *)tlv +
1232                                             sizeof(struct filter_tlv) +
1233                                             sizeof(struct filter));
1234
1235                 tlv->type = CLSF_TLV_ACTION;
1236                 tlv->length = sizeof(struct filter_action);
1237                 action = (struct filter_action *)&tlv->val;
1238                 action->type = FILTER_ACTION_RQ_STEERING;
1239                 action->u.rq_idx = *entry;
1240
1241                 ret = vnic_dev_cmd(vdev, CMD_ADD_FILTER, &a0, &a1, wait);
1242                 *entry = (u16)a0;
1243                 pci_free_consistent(vdev->pdev, tlv_size, tlv_va, tlv_pa);
1244         } else if (cmd == CLSF_DEL) {
1245                 a0 = *entry;
1246                 ret = vnic_dev_cmd(vdev, CMD_DEL_FILTER, &a0, &a1, wait);
1247         }
1248
1249         return ret;
1250 }
1251
1252 int vnic_dev_overlay_offload_ctrl(struct vnic_dev *vdev, u8 overlay, u8 config)
1253 {
1254         u64 a0 = overlay;
1255         u64 a1 = config;
1256         int wait = 1000;
1257
1258         return vnic_dev_cmd(vdev, CMD_OVERLAY_OFFLOAD_CTRL, &a0, &a1, wait);
1259 }
1260
1261 int vnic_dev_overlay_offload_cfg(struct vnic_dev *vdev, u8 overlay,
1262                                  u16 vxlan_udp_port_number)
1263 {
1264         u64 a1 = vxlan_udp_port_number;
1265         u64 a0 = overlay;
1266         int wait = 1000;
1267
1268         return vnic_dev_cmd(vdev, CMD_OVERLAY_OFFLOAD_CFG, &a0, &a1, wait);
1269 }
1270
1271 int vnic_dev_get_supported_feature_ver(struct vnic_dev *vdev, u8 feature,
1272                                        u64 *supported_versions, u64 *a1)
1273 {
1274         u64 a0 = feature;
1275         int wait = 1000;
1276         int ret;
1277
1278         ret = vnic_dev_cmd(vdev, CMD_GET_SUPP_FEATURE_VER, &a0, a1, wait);
1279         if (!ret)
1280                 *supported_versions = a0;
1281
1282         return ret;
1283 }
1284
1285 int vnic_dev_capable_rss_hash_type(struct vnic_dev *vdev, u8 *rss_hash_type)
1286 {
1287         u64 a0 = CMD_NIC_CFG, a1 = 0;
1288         int wait = 1000;
1289         int err;
1290
1291         err = vnic_dev_cmd(vdev, CMD_CAPABILITY, &a0, &a1, wait);
1292         /* rss_hash_type is valid only when a0 is 1. Adapter which does not
1293          * support CMD_CAPABILITY for rss_hash_type has a0 = 0
1294          */
1295         if (err || (a0 != 1))
1296                 return -EOPNOTSUPP;
1297
1298         a1 = (a1 >> NIC_CFG_RSS_HASH_TYPE_SHIFT) &
1299              NIC_CFG_RSS_HASH_TYPE_MASK_FIELD;
1300
1301         *rss_hash_type = (u8)a1;
1302
1303         return 0;
1304 }