linux/drivers/net/ethernet/cisco/enic/vnic_dev.c
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   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
  39void *vnic_dev_priv(struct vnic_dev *vdev)
  40{
  41        return vdev->priv;
  42}
  43
  44static 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
 133unsigned int vnic_dev_get_res_count(struct vnic_dev *vdev,
 134        enum vnic_res_type type)
 135{
 136        return vdev->res[type].count;
 137}
 138EXPORT_SYMBOL(vnic_dev_get_res_count);
 139
 140void __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}
 157EXPORT_SYMBOL(vnic_dev_get_res);
 158
 159static 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
 186void vnic_dev_clear_desc_ring(struct vnic_dev_ring *ring)
 187{
 188        memset(ring->descs, 0, ring->size);
 189}
 190
 191int 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
 218void 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
 229static 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
 297static 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
 373static 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
 383static 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
 434err_free_desc_ring:
 435        vnic_dev_free_desc_ring(vdev, &vdev->devcmd2->results_ring);
 436err_disable_wq:
 437        vnic_wq_disable(&vdev->devcmd2->wq);
 438err_free_wq:
 439        vnic_wq_free(&vdev->devcmd2->wq);
 440err_free_devcmd2:
 441        kfree(vdev->devcmd2);
 442        vdev->devcmd2 = NULL;
 443
 444        return err;
 445}
 446
 447static 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
 455static 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
 489static 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
 505void 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
 511void vnic_dev_cmd_proxy_end(struct vnic_dev *vdev)
 512{
 513        vdev->proxy = PROXY_NONE;
 514        vdev->proxy_index = 0;
 515}
 516
 517int 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
 535static 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
 546int 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
 577int 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
 600int 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
 619int 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
 626int 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
 637int 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
 644int 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
 651int 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
 668int 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
 675int 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
 692int 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
 709int 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
 731int 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
 738int 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
 757int 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
 777int 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
 794int 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
 811int 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
 824static 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
 844int 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
 864static 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
 882int 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
 894static 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
 915int 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
 936int 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
 944void 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
 953int 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
 984int 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
 992u32 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
1000u32 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
1008u32 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
1016void 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
1022enum vnic_dev_intr_mode vnic_dev_get_intr_mode(
1023        struct vnic_dev *vdev)
1024{
1025        return vdev->intr_mode;
1026}
1027
1028u32 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
1034u32 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
1040u32 vnic_dev_get_intr_coal_timer_max(struct vnic_dev *vdev)
1041{
1042        return vdev->intr_coal_timer_info.max_usec;
1043}
1044
1045void 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}
1067EXPORT_SYMBOL(vnic_dev_unregister);
1068
1069struct 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_ATOMIC);
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
1087err_out:
1088        vnic_dev_unregister(vdev);
1089        return NULL;
1090}
1091EXPORT_SYMBOL(vnic_dev_register);
1092
1093struct pci_dev *vnic_dev_get_pdev(struct vnic_dev *vdev)
1094{
1095        return vdev->pdev;
1096}
1097EXPORT_SYMBOL(vnic_dev_get_pdev);
1098
1099int 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
1122int 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
1145int 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
1155static 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
1169int vnic_dev_enable2_done(struct vnic_dev *vdev, int *status)
1170{
1171        return vnic_dev_cmd_status(vdev, CMD_ENABLE2, status);
1172}
1173
1174int vnic_dev_deinit_done(struct vnic_dev *vdev, int *status)
1175{
1176        return vnic_dev_cmd_status(vdev, CMD_DEINIT, status);
1177}
1178
1179int 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 */
1205int 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
1252int 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
1261int 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
1271int vnic_dev_get_supported_feature_ver(struct vnic_dev *vdev, u8 feature,
1272                                       u64 *supported_versions)
1273{
1274        u64 a0 = feature;
1275        int wait = 1000;
1276        u64 a1 = 0;
1277        int ret;
1278
1279        ret = vnic_dev_cmd(vdev, CMD_GET_SUPP_FEATURE_VER, &a0, &a1, wait);
1280        if (!ret)
1281                *supported_versions = a0;
1282
1283        return ret;
1284}
1285