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
 406                 return -ENODEV;
 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_free_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_free_wq:
 437         vnic_wq_disable(&vdev->devcmd2->wq);
 438         vnic_wq_free(&vdev->devcmd2->wq);
 439 err_free_devcmd2:
 440         kfree(vdev->devcmd2);
 441         vdev->devcmd2 = NULL;
 442
 443         return err;
 444 }
 445
 446 static void vnic_dev_deinit_devcmd2(struct vnic_dev *vdev)
 447 {
 448         vnic_dev_free_desc_ring(vdev, &vdev->devcmd2->results_ring);
 449         vnic_wq_disable(&vdev->devcmd2->wq);
 450         vnic_wq_free(&vdev->devcmd2->wq);
 451         kfree(vdev->devcmd2);
 452 }
 453
 454 static int vnic_dev_cmd_proxy(struct vnic_dev *vdev,
 455         enum vnic_devcmd_cmd proxy_cmd, enum vnic_devcmd_cmd cmd,
 456         u64 *a0, u64 *a1, int wait)
 457 {
 458         u32 status;
 459         int err;
 460
 461         memset(vdev->args, 0, sizeof(vdev->args));
 462
 463         vdev->args[0] = vdev->proxy_index;
 464         vdev->args[1] = cmd;
 465         vdev->args[2] = *a0;
 466         vdev->args[3] = *a1;
 467
 468         err = vdev->devcmd_rtn(vdev, proxy_cmd, wait);
 469         if (err)
 470                 return err;
 471
 472         status = (u32)vdev->args[0];
 473         if (status & STAT_ERROR) {
 474                 err = (int)vdev->args[1];
 475                 if (err != ERR_ECMDUNKNOWN ||
 476                     cmd != CMD_CAPABILITY)
 477                         vdev_neterr(vdev, "Error %d proxy devcmd %d\n",
 478                                     err, _CMD_N(cmd));
 479                 return err;
 480         }
 481
 482         *a0 = vdev->args[1];
 483         *a1 = vdev->args[2];
 484
 485         return 0;
 486 }
 487
 488 static int vnic_dev_cmd_no_proxy(struct vnic_dev *vdev,
 489         enum vnic_devcmd_cmd cmd, u64 *a0, u64 *a1, int wait)
 490 {
 491         int err;
 492
 493         vdev->args[0] = *a0;
 494         vdev->args[1] = *a1;
 495
 496         err = vdev->devcmd_rtn(vdev, cmd, wait);
 497
 498         *a0 = vdev->args[0];
 499         *a1 = vdev->args[1];
 500
 501         return err;
 502 }
 503
 504 void vnic_dev_cmd_proxy_by_index_start(struct vnic_dev *vdev, u16 index)
 505 {
 506         vdev->proxy = PROXY_BY_INDEX;
 507         vdev->proxy_index = index;
 508 }
 509
 510 void vnic_dev_cmd_proxy_end(struct vnic_dev *vdev)
 511 {
 512         vdev->proxy = PROXY_NONE;
 513         vdev->proxy_index = 0;
 514 }
 515
 516 int vnic_dev_cmd(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd,
 517         u64 *a0, u64 *a1, int wait)
 518 {
 519         memset(vdev->args, 0, sizeof(vdev->args));
 520
 521         switch (vdev->proxy) {
 522         case PROXY_BY_INDEX:
 523                 return vnic_dev_cmd_proxy(vdev, CMD_PROXY_BY_INDEX, cmd,
 524                                 a0, a1, wait);
 525         case PROXY_BY_BDF:
 526                 return vnic_dev_cmd_proxy(vdev, CMD_PROXY_BY_BDF, cmd,
 527                                 a0, a1, wait);
 528         case PROXY_NONE:
 529         default:
 530                 return vnic_dev_cmd_no_proxy(vdev, cmd, a0, a1, wait);
 531         }
 532 }
 533
 534 static int vnic_dev_capable(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd)
 535 {
 536         u64 a0 = (u32)cmd, a1 = 0;
 537         int wait = 1000;
 538         int err;
 539
 540         err = vnic_dev_cmd(vdev, CMD_CAPABILITY, &a0, &a1, wait);
 541
 542         return !(err || a0);
 543 }
 544
 545 int vnic_dev_fw_info(struct vnic_dev *vdev,
 546         struct vnic_devcmd_fw_info **fw_info)
 547 {
 548         u64 a0, a1 = 0;
 549         int wait = 1000;
 550         int err = 0;
 551
 552         if (!vdev->fw_info) {
 553                 vdev->fw_info = pci_zalloc_consistent(vdev->pdev,
 554                                                       sizeof(struct vnic_devcmd_fw_info),
 555                                                       &vdev->fw_info_pa);
 556                 if (!vdev->fw_info)
 557                         return -ENOMEM;
 558
 559                 a0 = vdev->fw_info_pa;
 560                 a1 = sizeof(struct vnic_devcmd_fw_info);
 561
 562                 /* only get fw_info once and cache it */
 563                 if (vnic_dev_capable(vdev, CMD_MCPU_FW_INFO))
 564                         err = vnic_dev_cmd(vdev, CMD_MCPU_FW_INFO,
 565                                 &a0, &a1, wait);
 566                 else
 567                         err = vnic_dev_cmd(vdev, CMD_MCPU_FW_INFO_OLD,
 568                                 &a0, &a1, wait);
 569         }
 570
 571         *fw_info = vdev->fw_info;
 572
 573         return err;
 574 }
 575
 576 int vnic_dev_spec(struct vnic_dev *vdev, unsigned int offset, unsigned int size,
 577         void *value)
 578 {
 579         u64 a0, a1;
 580         int wait = 1000;
 581         int err;
 582
 583         a0 = offset;
 584         a1 = size;
 585
 586         err = vnic_dev_cmd(vdev, CMD_DEV_SPEC, &a0, &a1, wait);
 587
 588         switch (size) {
 589         case 1: *(u8 *)value = (u8)a0; break;
 590         case 2: *(u16 *)value = (u16)a0; break;
 591         case 4: *(u32 *)value = (u32)a0; break;
 592         case 8: *(u64 *)value = a0; break;
 593         default: BUG(); break;
 594         }
 595
 596         return err;
 597 }
 598
 599 int vnic_dev_stats_dump(struct vnic_dev *vdev, struct vnic_stats **stats)
 600 {
 601         u64 a0, a1;
 602         int wait = 1000;
 603
 604         if (!vdev->stats) {
 605                 vdev->stats = pci_alloc_consistent(vdev->pdev,
 606                         sizeof(struct vnic_stats), &vdev->stats_pa);
 607                 if (!vdev->stats)
 608                         return -ENOMEM;
 609         }
 610
 611         *stats = vdev->stats;
 612         a0 = vdev->stats_pa;
 613         a1 = sizeof(struct vnic_stats);
 614
 615         return vnic_dev_cmd(vdev, CMD_STATS_DUMP, &a0, &a1, wait);
 616 }
 617
 618 int vnic_dev_close(struct vnic_dev *vdev)
 619 {
 620         u64 a0 = 0, a1 = 0;
 621         int wait = 1000;
 622         return vnic_dev_cmd(vdev, CMD_CLOSE, &a0, &a1, wait);
 623 }
 624
 625 int vnic_dev_enable_wait(struct vnic_dev *vdev)
 626 {
 627         u64 a0 = 0, a1 = 0;
 628         int wait = 1000;
 629
 630         if (vnic_dev_capable(vdev, CMD_ENABLE_WAIT))
 631                 return vnic_dev_cmd(vdev, CMD_ENABLE_WAIT, &a0, &a1, wait);
 632         else
 633                 return vnic_dev_cmd(vdev, CMD_ENABLE, &a0, &a1, wait);
 634 }
 635
 636 int vnic_dev_disable(struct vnic_dev *vdev)
 637 {
 638         u64 a0 = 0, a1 = 0;
 639         int wait = 1000;
 640         return vnic_dev_cmd(vdev, CMD_DISABLE, &a0, &a1, wait);
 641 }
 642
 643 int vnic_dev_open(struct vnic_dev *vdev, int arg)
 644 {
 645         u64 a0 = (u32)arg, a1 = 0;
 646         int wait = 1000;
 647         return vnic_dev_cmd(vdev, CMD_OPEN, &a0, &a1, wait);
 648 }
 649
 650 int vnic_dev_open_done(struct vnic_dev *vdev, int *done)
 651 {
 652         u64 a0 = 0, a1 = 0;
 653         int wait = 1000;
 654         int err;
 655
 656         *done = 0;
 657
 658         err = vnic_dev_cmd(vdev, CMD_OPEN_STATUS, &a0, &a1, wait);
 659         if (err)
 660                 return err;
 661
 662         *done = (a0 == 0);
 663
 664         return 0;
 665 }
 666
 667 int vnic_dev_soft_reset(struct vnic_dev *vdev, int arg)
 668 {
 669         u64 a0 = (u32)arg, a1 = 0;
 670         int wait = 1000;
 671         return vnic_dev_cmd(vdev, CMD_SOFT_RESET, &a0, &a1, wait);
 672 }
 673
 674 int vnic_dev_soft_reset_done(struct vnic_dev *vdev, int *done)
 675 {
 676         u64 a0 = 0, a1 = 0;
 677         int wait = 1000;
 678         int err;
 679
 680         *done = 0;
 681
 682         err = vnic_dev_cmd(vdev, CMD_SOFT_RESET_STATUS, &a0, &a1, wait);
 683         if (err)
 684                 return err;
 685
 686         *done = (a0 == 0);
 687
 688         return 0;
 689 }
 690
 691 int vnic_dev_hang_reset(struct vnic_dev *vdev, int arg)
 692 {
 693         u64 a0 = (u32)arg, a1 = 0;
 694         int wait = 1000;
 695         int err;
 696
 697         if (vnic_dev_capable(vdev, CMD_HANG_RESET)) {
 698                 return vnic_dev_cmd(vdev, CMD_HANG_RESET,
 699                                 &a0, &a1, wait);
 700         } else {
 701                 err = vnic_dev_soft_reset(vdev, arg);
 702                 if (err)
 703                         return err;
 704                 return vnic_dev_init(vdev, 0);
 705         }
 706 }
 707
 708 int vnic_dev_hang_reset_done(struct vnic_dev *vdev, int *done)
 709 {
 710         u64 a0 = 0, a1 = 0;
 711         int wait = 1000;
 712         int err;
 713
 714         *done = 0;
 715
 716         if (vnic_dev_capable(vdev, CMD_HANG_RESET_STATUS)) {
 717                 err = vnic_dev_cmd(vdev, CMD_HANG_RESET_STATUS,
 718                                 &a0, &a1, wait);
 719                 if (err)
 720                         return err;
 721         } else {
 722                 return vnic_dev_soft_reset_done(vdev, done);
 723         }
 724
 725         *done = (a0 == 0);
 726
 727         return 0;
 728 }
 729
 730 int vnic_dev_hang_notify(struct vnic_dev *vdev)
 731 {
 732         u64 a0, a1;
 733         int wait = 1000;
 734         return vnic_dev_cmd(vdev, CMD_HANG_NOTIFY, &a0, &a1, wait);
 735 }
 736
 737 int vnic_dev_get_mac_addr(struct vnic_dev *vdev, u8 *mac_addr)
 738 {
 739         u64 a0, a1;
 740         int wait = 1000;
 741         int err, i;
 742
 743         for (i = 0; i < ETH_ALEN; i++)
 744                 mac_addr[i] = 0;
 745
 746         err = vnic_dev_cmd(vdev, CMD_GET_MAC_ADDR, &a0, &a1, wait);
 747         if (err)
 748                 return err;
 749
 750         for (i = 0; i < ETH_ALEN; i++)
 751                 mac_addr[i] = ((u8 *)&a0)[i];
 752
 753         return 0;
 754 }
 755
 756 int vnic_dev_packet_filter(struct vnic_dev *vdev, int directed, int multicast,
 757         int broadcast, int promisc, int allmulti)
 758 {
 759         u64 a0, a1 = 0;
 760         int wait = 1000;
 761         int err;
 762
 763         a0 = (directed ? CMD_PFILTER_DIRECTED : 0) |
 764              (multicast ? CMD_PFILTER_MULTICAST : 0) |
 765              (broadcast ? CMD_PFILTER_BROADCAST : 0) |
 766              (promisc ? CMD_PFILTER_PROMISCUOUS : 0) |
 767              (allmulti ? CMD_PFILTER_ALL_MULTICAST : 0);
 768
 769         err = vnic_dev_cmd(vdev, CMD_PACKET_FILTER, &a0, &a1, wait);
 770         if (err)
 771                 vdev_neterr(vdev, "Can't set packet filter\n");
 772
 773         return err;
 774 }
 775
 776 int vnic_dev_add_addr(struct vnic_dev *vdev, const u8 *addr)
 777 {
 778         u64 a0 = 0, a1 = 0;
 779         int wait = 1000;
 780         int err;
 781         int i;
 782
 783         for (i = 0; i < ETH_ALEN; i++)
 784                 ((u8 *)&a0)[i] = addr[i];
 785
 786         err = vnic_dev_cmd(vdev, CMD_ADDR_ADD, &a0, &a1, wait);
 787         if (err)
 788                 vdev_neterr(vdev, "Can't add addr [%pM], %d\n", addr, err);
 789
 790         return err;
 791 }
 792
 793 int vnic_dev_del_addr(struct vnic_dev *vdev, const u8 *addr)
 794 {
 795         u64 a0 = 0, a1 = 0;
 796         int wait = 1000;
 797         int err;
 798         int i;
 799
 800         for (i = 0; i < ETH_ALEN; i++)
 801                 ((u8 *)&a0)[i] = addr[i];
 802
 803         err = vnic_dev_cmd(vdev, CMD_ADDR_DEL, &a0, &a1, wait);
 804         if (err)
 805                 vdev_neterr(vdev, "Can't del addr [%pM], %d\n", addr, err);
 806
 807         return err;
 808 }
 809
 810 int vnic_dev_set_ig_vlan_rewrite_mode(struct vnic_dev *vdev,
 811         u8 ig_vlan_rewrite_mode)
 812 {
 813         u64 a0 = ig_vlan_rewrite_mode, a1 = 0;
 814         int wait = 1000;
 815
 816         if (vnic_dev_capable(vdev, CMD_IG_VLAN_REWRITE_MODE))
 817                 return vnic_dev_cmd(vdev, CMD_IG_VLAN_REWRITE_MODE,
 818                                 &a0, &a1, wait);
 819         else
 820                 return 0;
 821 }
 822
 823 static int vnic_dev_notify_setcmd(struct vnic_dev *vdev,
 824         void *notify_addr, dma_addr_t notify_pa, u16 intr)
 825 {
 826         u64 a0, a1;
 827         int wait = 1000;
 828         int r;
 829
 830         memset(notify_addr, 0, sizeof(struct vnic_devcmd_notify));
 831         vdev->notify = notify_addr;
 832         vdev->notify_pa = notify_pa;
 833
 834         a0 = (u64)notify_pa;
 835         a1 = ((u64)intr << 32) & 0x0000ffff00000000ULL;
 836         a1 += sizeof(struct vnic_devcmd_notify);
 837
 838         r = vnic_dev_cmd(vdev, CMD_NOTIFY, &a0, &a1, wait);
 839         vdev->notify_sz = (r == 0) ? (u32)a1 : 0;
 840         return r;
 841 }
 842
 843 int vnic_dev_notify_set(struct vnic_dev *vdev, u16 intr)
 844 {
 845         void *notify_addr;
 846         dma_addr_t notify_pa;
 847
 848         if (vdev->notify || vdev->notify_pa) {
 849                 vdev_neterr(vdev, "notify block %p still allocated\n",
 850                             vdev->notify);
 851                 return -EINVAL;
 852         }
 853
 854         notify_addr = pci_alloc_consistent(vdev->pdev,
 855                         sizeof(struct vnic_devcmd_notify),
 856                         &notify_pa);
 857         if (!notify_addr)
 858                 return -ENOMEM;
 859
 860         return vnic_dev_notify_setcmd(vdev, notify_addr, notify_pa, intr);
 861 }
 862
 863 static int vnic_dev_notify_unsetcmd(struct vnic_dev *vdev)
 864 {
 865         u64 a0, a1;
 866         int wait = 1000;
 867         int err;
 868
 869         a0 = 0;  /* paddr = 0 to unset notify buffer */
 870         a1 = 0x0000ffff00000000ULL; /* intr num = -1 to unreg for intr */
 871         a1 += sizeof(struct vnic_devcmd_notify);
 872
 873         err = vnic_dev_cmd(vdev, CMD_NOTIFY, &a0, &a1, wait);
 874         vdev->notify = NULL;
 875         vdev->notify_pa = 0;
 876         vdev->notify_sz = 0;
 877
 878         return err;
 879 }
 880
 881 int vnic_dev_notify_unset(struct vnic_dev *vdev)
 882 {
 883         if (vdev->notify) {
 884                 pci_free_consistent(vdev->pdev,
 885                         sizeof(struct vnic_devcmd_notify),
 886                         vdev->notify,
 887                         vdev->notify_pa);
 888         }
 889
 890         return vnic_dev_notify_unsetcmd(vdev);
 891 }
 892
 893 static int vnic_dev_notify_ready(struct vnic_dev *vdev)
 894 {
 895         u32 *words;
 896         unsigned int nwords = vdev->notify_sz / 4;
 897         unsigned int i;
 898         u32 csum;
 899
 900         if (!vdev->notify || !vdev->notify_sz)
 901                 return 0;
 902
 903         do {
 904                 csum = 0;
 905                 memcpy(&vdev->notify_copy, vdev->notify, vdev->notify_sz);
 906                 words = (u32 *)&vdev->notify_copy;
 907                 for (i = 1; i < nwords; i++)
 908                         csum += words[i];
 909         } while (csum != words[0]);
 910
 911         return 1;
 912 }
 913
 914 int vnic_dev_init(struct vnic_dev *vdev, int arg)
 915 {
 916         u64 a0 = (u32)arg, a1 = 0;
 917         int wait = 1000;
 918         int r = 0;
 919
 920         if (vnic_dev_capable(vdev, CMD_INIT))
 921                 r = vnic_dev_cmd(vdev, CMD_INIT, &a0, &a1, wait);
 922         else {
 923                 vnic_dev_cmd(vdev, CMD_INIT_v1, &a0, &a1, wait);
 924                 if (a0 & CMD_INITF_DEFAULT_MAC) {
 925                         /* Emulate these for old CMD_INIT_v1 which
 926                          * didn't pass a0 so no CMD_INITF_*.
 927                          */
 928                         vnic_dev_cmd(vdev, CMD_GET_MAC_ADDR, &a0, &a1, wait);
 929                         vnic_dev_cmd(vdev, CMD_ADDR_ADD, &a0, &a1, wait);
 930                 }
 931         }
 932         return r;
 933 }
 934
 935 int vnic_dev_deinit(struct vnic_dev *vdev)
 936 {
 937         u64 a0 = 0, a1 = 0;
 938         int wait = 1000;
 939
 940         return vnic_dev_cmd(vdev, CMD_DEINIT, &a0, &a1, wait);
 941 }
 942
 943 void vnic_dev_intr_coal_timer_info_default(struct vnic_dev *vdev)
 944 {
 945         /* Default: hardware intr coal timer is in units of 1.5 usecs */
 946         vdev->intr_coal_timer_info.mul = 2;
 947         vdev->intr_coal_timer_info.div = 3;
 948         vdev->intr_coal_timer_info.max_usec =
 949                 vnic_dev_intr_coal_timer_hw_to_usec(vdev, 0xffff);
 950 }
 951
 952 int vnic_dev_intr_coal_timer_info(struct vnic_dev *vdev)
 953 {
 954         int wait = 1000;
 955         int err;
 956
 957         memset(vdev->args, 0, sizeof(vdev->args));
 958
 959         if (vnic_dev_capable(vdev, CMD_INTR_COAL_CONVERT))
 960                 err = vdev->devcmd_rtn(vdev, CMD_INTR_COAL_CONVERT, wait);
 961         else
 962                 err = ERR_ECMDUNKNOWN;
 963
 964         /* Use defaults when firmware doesn't support the devcmd at all or
 965          * supports it for only specific hardware
 966          */
 967         if ((err == ERR_ECMDUNKNOWN) ||
 968                 (!err && !(vdev->args[0] && vdev->args[1] && vdev->args[2]))) {
 969                 vdev_netwarn(vdev, "Using default conversion factor for interrupt coalesce timer\n");
 970                 vnic_dev_intr_coal_timer_info_default(vdev);
 971                 return 0;
 972         }
 973
 974         if (!err) {
 975                 vdev->intr_coal_timer_info.mul = (u32) vdev->args[0];
 976                 vdev->intr_coal_timer_info.div = (u32) vdev->args[1];
 977                 vdev->intr_coal_timer_info.max_usec = (u32) vdev->args[2];
 978         }
 979
 980         return err;
 981 }
 982
 983 int vnic_dev_link_status(struct vnic_dev *vdev)
 984 {
 985         if (!vnic_dev_notify_ready(vdev))
 986                 return 0;
 987
 988         return vdev->notify_copy.link_state;
 989 }
 990
 991 u32 vnic_dev_port_speed(struct vnic_dev *vdev)
 992 {
 993         if (!vnic_dev_notify_ready(vdev))
 994                 return 0;
 995
 996         return vdev->notify_copy.port_speed;
 997 }
 998
 999 u32 vnic_dev_msg_lvl(struct vnic_dev *vdev)
1000 {
1001         if (!vnic_dev_notify_ready(vdev))
1002                 return 0;
1003
1004         return vdev->notify_copy.msglvl;
1005 }
1006
1007 u32 vnic_dev_mtu(struct vnic_dev *vdev)
1008 {
1009         if (!vnic_dev_notify_ready(vdev))
1010                 return 0;
1011
1012         return vdev->notify_copy.mtu;
1013 }
1014
1015 void vnic_dev_set_intr_mode(struct vnic_dev *vdev,
1016         enum vnic_dev_intr_mode intr_mode)
1017 {
1018         vdev->intr_mode = intr_mode;
1019 }
1020
1021 enum vnic_dev_intr_mode vnic_dev_get_intr_mode(
1022         struct vnic_dev *vdev)
1023 {
1024         return vdev->intr_mode;
1025 }
1026
1027 u32 vnic_dev_intr_coal_timer_usec_to_hw(struct vnic_dev *vdev, u32 usec)
1028 {
1029         return (usec * vdev->intr_coal_timer_info.mul) /
1030                 vdev->intr_coal_timer_info.div;
1031 }
1032
1033 u32 vnic_dev_intr_coal_timer_hw_to_usec(struct vnic_dev *vdev, u32 hw_cycles)
1034 {
1035         return (hw_cycles * vdev->intr_coal_timer_info.div) /
1036                 vdev->intr_coal_timer_info.mul;
1037 }
1038
1039 u32 vnic_dev_get_intr_coal_timer_max(struct vnic_dev *vdev)
1040 {
1041         return vdev->intr_coal_timer_info.max_usec;
1042 }
1043
1044 void vnic_dev_unregister(struct vnic_dev *vdev)
1045 {
1046         if (vdev) {
1047                 if (vdev->notify)
1048                         pci_free_consistent(vdev->pdev,
1049                                 sizeof(struct vnic_devcmd_notify),
1050                                 vdev->notify,
1051                                 vdev->notify_pa);
1052                 if (vdev->stats)
1053                         pci_free_consistent(vdev->pdev,
1054                                 sizeof(struct vnic_stats),
1055                                 vdev->stats, vdev->stats_pa);
1056                 if (vdev->fw_info)
1057                         pci_free_consistent(vdev->pdev,
1058                                 sizeof(struct vnic_devcmd_fw_info),
1059                                 vdev->fw_info, vdev->fw_info_pa);
1060                 if (vdev->devcmd2)
1061                         vnic_dev_deinit_devcmd2(vdev);
1062
1063                 kfree(vdev);
1064         }
1065 }
1066 EXPORT_SYMBOL(vnic_dev_unregister);
1067
1068 struct vnic_dev *vnic_dev_register(struct vnic_dev *vdev,
1069         void *priv, struct pci_dev *pdev, struct vnic_dev_bar *bar,
1070         unsigned int num_bars)
1071 {
1072         if (!vdev) {
1073                 vdev = kzalloc(sizeof(struct vnic_dev), GFP_ATOMIC);
1074                 if (!vdev)
1075                         return NULL;
1076         }
1077
1078         vdev->priv = priv;
1079         vdev->pdev = pdev;
1080
1081         if (vnic_dev_discover_res(vdev, bar, num_bars))
1082                 goto err_out;
1083
1084         return vdev;
1085
1086 err_out:
1087         vnic_dev_unregister(vdev);
1088         return NULL;
1089 }
1090 EXPORT_SYMBOL(vnic_dev_register);
1091
1092 struct pci_dev *vnic_dev_get_pdev(struct vnic_dev *vdev)
1093 {
1094         return vdev->pdev;
1095 }
1096 EXPORT_SYMBOL(vnic_dev_get_pdev);
1097
1098 int vnic_devcmd_init(struct vnic_dev *vdev)
1099 {
1100         void __iomem *res;
1101         int err;
1102
1103         res = vnic_dev_get_res(vdev, RES_TYPE_DEVCMD2, 0);
1104         if (res) {
1105                 err = vnic_dev_init_devcmd2(vdev);
1106                 if (err)
1107                         vdev_warn(vdev, "DEVCMD2 init failed: %d, Using DEVCMD1\n",
1108                                   err);
1109                 else
1110                         return 0;
1111         } else {
1112                 vdev_warn(vdev, "DEVCMD2 resource not found (old firmware?) Using DEVCMD1\n");
1113         }
1114         err = vnic_dev_init_devcmd1(vdev);
1115         if (err)
1116                 vdev_err(vdev, "DEVCMD1 initialization failed: %d\n", err);
1117
1118         return err;
1119 }
1120
1121 int vnic_dev_init_prov2(struct vnic_dev *vdev, u8 *buf, u32 len)
1122 {
1123         u64 a0, a1 = len;
1124         int wait = 1000;
1125         dma_addr_t prov_pa;
1126         void *prov_buf;
1127         int ret;
1128
1129         prov_buf = pci_alloc_consistent(vdev->pdev, len, &prov_pa);
1130         if (!prov_buf)
1131                 return -ENOMEM;
1132
1133         memcpy(prov_buf, buf, len);
1134
1135         a0 = prov_pa;
1136
1137         ret = vnic_dev_cmd(vdev, CMD_INIT_PROV_INFO2, &a0, &a1, wait);
1138
1139         pci_free_consistent(vdev->pdev, len, prov_buf, prov_pa);
1140
1141         return ret;
1142 }
1143
1144 int vnic_dev_enable2(struct vnic_dev *vdev, int active)
1145 {
1146         u64 a0, a1 = 0;
1147         int wait = 1000;
1148
1149         a0 = (active ? CMD_ENABLE2_ACTIVE : 0);
1150
1151         return vnic_dev_cmd(vdev, CMD_ENABLE2, &a0, &a1, wait);
1152 }
1153
1154 static int vnic_dev_cmd_status(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd,
1155         int *status)
1156 {
1157         u64 a0 = cmd, a1 = 0;
1158         int wait = 1000;
1159         int ret;
1160
1161         ret = vnic_dev_cmd(vdev, CMD_STATUS, &a0, &a1, wait);
1162         if (!ret)
1163                 *status = (int)a0;
1164
1165         return ret;
1166 }
1167
1168 int vnic_dev_enable2_done(struct vnic_dev *vdev, int *status)
1169 {
1170         return vnic_dev_cmd_status(vdev, CMD_ENABLE2, status);
1171 }
1172
1173 int vnic_dev_deinit_done(struct vnic_dev *vdev, int *status)
1174 {
1175         return vnic_dev_cmd_status(vdev, CMD_DEINIT, status);
1176 }
1177
1178 int vnic_dev_set_mac_addr(struct vnic_dev *vdev, u8 *mac_addr)
1179 {
1180         u64 a0, a1;
1181         int wait = 1000;
1182         int i;
1183
1184         for (i = 0; i < ETH_ALEN; i++)
1185                 ((u8 *)&a0)[i] = mac_addr[i];
1186
1187         return vnic_dev_cmd(vdev, CMD_SET_MAC_ADDR, &a0, &a1, wait);
1188 }
1189
1190 /* vnic_dev_classifier: Add/Delete classifier entries
1191  * @vdev: vdev of the device
1192  * @cmd: CLSF_ADD for Add filter
1193  *       CLSF_DEL for Delete filter
1194  * @entry: In case of ADD filter, the caller passes the RQ number in this
1195  *         variable.
1196  *
1197  *         This function stores the filter_id returned by the firmware in the
1198  *         same variable before return;
1199  *
1200  *         In case of DEL filter, the caller passes the RQ number. Return
1201  *         value is irrelevant.
1202  * @data: filter data
1203  */
1204 int vnic_dev_classifier(struct vnic_dev *vdev, u8 cmd, u16 *entry,
1205                         struct filter *data)
1206 {
1207         u64 a0, a1;
1208         int wait = 1000;
1209         dma_addr_t tlv_pa;
1210         int ret = -EINVAL;
1211         struct filter_tlv *tlv, *tlv_va;
1212         struct filter_action *action;
1213         u64 tlv_size;
1214
1215         if (cmd == CLSF_ADD) {
1216                 tlv_size = sizeof(struct filter) +
1217                            sizeof(struct filter_action) +
1218                            2 * sizeof(struct filter_tlv);
1219                 tlv_va = pci_alloc_consistent(vdev->pdev, tlv_size, &tlv_pa);
1220                 if (!tlv_va)
1221                         return -ENOMEM;
1222                 tlv = tlv_va;
1223                 a0 = tlv_pa;
1224                 a1 = tlv_size;
1225                 memset(tlv, 0, tlv_size);
1226                 tlv->type = CLSF_TLV_FILTER;
1227                 tlv->length = sizeof(struct filter);
1228                 *(struct filter *)&tlv->val = *data;
1229
1230                 tlv = (struct filter_tlv *)((char *)tlv +
1231                                             sizeof(struct filter_tlv) +
1232                                             sizeof(struct filter));
1233
1234                 tlv->type = CLSF_TLV_ACTION;
1235                 tlv->length = sizeof(struct filter_action);
1236                 action = (struct filter_action *)&tlv->val;
1237                 action->type = FILTER_ACTION_RQ_STEERING;
1238                 action->u.rq_idx = *entry;
1239
1240                 ret = vnic_dev_cmd(vdev, CMD_ADD_FILTER, &a0, &a1, wait);
1241                 *entry = (u16)a0;
1242                 pci_free_consistent(vdev->pdev, tlv_size, tlv_va, tlv_pa);
1243         } else if (cmd == CLSF_DEL) {
1244                 a0 = *entry;
1245                 ret = vnic_dev_cmd(vdev, CMD_DEL_FILTER, &a0, &a1, wait);
1246         }
1247
1248         return ret;
1249 }
1250
1251 int vnic_dev_overlay_offload_ctrl(struct vnic_dev *vdev, u8 overlay, u8 config)
1252 {
1253         u64 a0 = overlay;
1254         u64 a1 = config;
1255         int wait = 1000;
1256
1257         return vnic_dev_cmd(vdev, CMD_OVERLAY_OFFLOAD_CTRL, &a0, &a1, wait);
1258 }
1259
1260 int vnic_dev_overlay_offload_cfg(struct vnic_dev *vdev, u8 overlay,
1261                                  u16 vxlan_udp_port_number)
1262 {
1263         u64 a1 = vxlan_udp_port_number;
1264         u64 a0 = overlay;
1265         int wait = 1000;
1266
1267         return vnic_dev_cmd(vdev, CMD_OVERLAY_OFFLOAD_CFG, &a0, &a1, wait);
1268 }
1269
1270 int vnic_dev_get_supported_feature_ver(struct vnic_dev *vdev, u8 feature,
1271                                        u64 *supported_versions)
1272 {
1273         u64 a0 = feature;
1274         int wait = 1000;
1275         u64 a1 = 0;
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 }