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("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("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("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("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("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("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("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("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 = dc2c->result + dc2c->next_result;
 302         unsigned int i;
 303         int delay, err;
 304         u32 fetch_index, new_posted;
 305         u32 posted = dc2c->posted;
 306
 307         fetch_index = ioread32(&dc2c->wq_ctrl->fetch_index);
 308
 309         if (fetch_index == 0xFFFFFFFF)
 310                 return -ENODEV;
 311
 312         new_posted = (posted + 1) % DEVCMD2_RING_SIZE;
 313
 314         if (new_posted == fetch_index) {
 315                 vdev_neterr("devcmd2 %d: wq is full. fetch index: %u, posted index: %u\n",
 316                             _CMD_N(cmd), fetch_index, posted);
 317                 return -EBUSY;
 318         }
 319         dc2c->cmd_ring[posted].cmd = cmd;
 320         dc2c->cmd_ring[posted].flags = 0;
 321
 322         if ((_CMD_FLAGS(cmd) & _CMD_FLAGS_NOWAIT))
 323                 dc2c->cmd_ring[posted].flags |= DEVCMD2_FNORESULT;
 324         if (_CMD_DIR(cmd) & _CMD_DIR_WRITE)
 325                 for (i = 0; i < VNIC_DEVCMD_NARGS; i++)
 326                         dc2c->cmd_ring[posted].args[i] = vdev->args[i];
 327
 328         /* Adding write memory barrier prevents compiler and/or CPU reordering,
 329          * thus avoiding descriptor posting before descriptor is initialized.
 330          * Otherwise, hardware can read stale descriptor fields.
 331          */
 332         wmb();
 333         iowrite32(new_posted, &dc2c->wq_ctrl->posted_index);
 334         dc2c->posted = new_posted;
 335
 336         if (dc2c->cmd_ring[posted].flags & DEVCMD2_FNORESULT)
 337                 return 0;
 338
 339         for (delay = 0; delay < wait; delay++) {
 340                 if (result->color == dc2c->color) {
 341                         dc2c->next_result++;
 342                         if (dc2c->next_result == dc2c->result_size) {
 343                                 dc2c->next_result = 0;
 344                                 dc2c->color = dc2c->color ? 0 : 1;
 345                         }
 346                         if (result->error) {
 347                                 err = result->error;
 348                                 if (err != ERR_ECMDUNKNOWN ||
 349                                     cmd != CMD_CAPABILITY)
 350                                         vdev_neterr("Error %d devcmd %d\n",
 351                                                     err, _CMD_N(cmd));
 352                                 return -err;
 353                         }
 354                         if (_CMD_DIR(cmd) & _CMD_DIR_READ)
 355                                 for (i = 0; i < VNIC_DEVCMD2_NARGS; i++)
 356                                         vdev->args[i] = result->results[i];
 357
 358                         return 0;
 359                 }
 360                 udelay(100);
 361         }
 362
 363         vdev_neterr("devcmd %d timed out\n", _CMD_N(cmd));
 364
 365         return -ETIMEDOUT;
 366 }
 367
 368 static int vnic_dev_init_devcmd1(struct vnic_dev *vdev)
 369 {
 370         vdev->devcmd = vnic_dev_get_res(vdev, RES_TYPE_DEVCMD, 0);
 371         if (!vdev->devcmd)
 372                 return -ENODEV;
 373         vdev->devcmd_rtn = _vnic_dev_cmd;
 374
 375         return 0;
 376 }
 377
 378 static int vnic_dev_init_devcmd2(struct vnic_dev *vdev)
 379 {
 380         int err;
 381         unsigned int fetch_index;
 382
 383         if (vdev->devcmd2)
 384                 return 0;
 385
 386         vdev->devcmd2 = kzalloc(sizeof(*vdev->devcmd2), GFP_KERNEL);
 387         if (!vdev->devcmd2)
 388                 return -ENOMEM;
 389
 390         vdev->devcmd2->color = 1;
 391         vdev->devcmd2->result_size = DEVCMD2_RING_SIZE;
 392         err = enic_wq_devcmd2_alloc(vdev, &vdev->devcmd2->wq, DEVCMD2_RING_SIZE,
 393                                     DEVCMD2_DESC_SIZE);
 394         if (err)
 395                 goto err_free_devcmd2;
 396
 397         fetch_index = ioread32(&vdev->devcmd2->wq.ctrl->fetch_index);
 398         if (fetch_index == 0xFFFFFFFF) { /* check for hardware gone  */
 399                 vdev_err("Fatal error in devcmd2 init - hardware surprise removal");
 400
 401                 return -ENODEV;
 402         }
 403
 404         enic_wq_init_start(&vdev->devcmd2->wq, 0, fetch_index, fetch_index, 0,
 405                            0);
 406         vdev->devcmd2->posted = fetch_index;
 407         vnic_wq_enable(&vdev->devcmd2->wq);
 408
 409         err = vnic_dev_alloc_desc_ring(vdev, &vdev->devcmd2->results_ring,
 410                                        DEVCMD2_RING_SIZE, DEVCMD2_DESC_SIZE);
 411         if (err)
 412                 goto err_free_wq;
 413
 414         vdev->devcmd2->result = vdev->devcmd2->results_ring.descs;
 415         vdev->devcmd2->cmd_ring = vdev->devcmd2->wq.ring.descs;
 416         vdev->devcmd2->wq_ctrl = vdev->devcmd2->wq.ctrl;
 417         vdev->args[0] = (u64)vdev->devcmd2->results_ring.base_addr |
 418                         VNIC_PADDR_TARGET;
 419         vdev->args[1] = DEVCMD2_RING_SIZE;
 420
 421         err = _vnic_dev_cmd2(vdev, CMD_INITIALIZE_DEVCMD2, 1000);
 422         if (err)
 423                 goto err_free_desc_ring;
 424
 425         vdev->devcmd_rtn = _vnic_dev_cmd2;
 426
 427         return 0;
 428
 429 err_free_desc_ring:
 430         vnic_dev_free_desc_ring(vdev, &vdev->devcmd2->results_ring);
 431 err_free_wq:
 432         vnic_wq_disable(&vdev->devcmd2->wq);
 433         vnic_wq_free(&vdev->devcmd2->wq);
 434 err_free_devcmd2:
 435         kfree(vdev->devcmd2);
 436         vdev->devcmd2 = NULL;
 437
 438         return err;
 439 }
 440
 441 static void vnic_dev_deinit_devcmd2(struct vnic_dev *vdev)
 442 {
 443         vnic_dev_free_desc_ring(vdev, &vdev->devcmd2->results_ring);
 444         vnic_wq_disable(&vdev->devcmd2->wq);
 445         vnic_wq_free(&vdev->devcmd2->wq);
 446         kfree(vdev->devcmd2);
 447 }
 448
 449 static int vnic_dev_cmd_proxy(struct vnic_dev *vdev,
 450         enum vnic_devcmd_cmd proxy_cmd, enum vnic_devcmd_cmd cmd,
 451         u64 *a0, u64 *a1, int wait)
 452 {
 453         u32 status;
 454         int err;
 455
 456         memset(vdev->args, 0, sizeof(vdev->args));
 457
 458         vdev->args[0] = vdev->proxy_index;
 459         vdev->args[1] = cmd;
 460         vdev->args[2] = *a0;
 461         vdev->args[3] = *a1;
 462
 463         err = vdev->devcmd_rtn(vdev, proxy_cmd, wait);
 464         if (err)
 465                 return err;
 466
 467         status = (u32)vdev->args[0];
 468         if (status & STAT_ERROR) {
 469                 err = (int)vdev->args[1];
 470                 if (err != ERR_ECMDUNKNOWN ||
 471                     cmd != CMD_CAPABILITY)
 472                         vdev_neterr("Error %d proxy devcmd %d\n", err,
 473                                     _CMD_N(cmd));
 474                 return err;
 475         }
 476
 477         *a0 = vdev->args[1];
 478         *a1 = vdev->args[2];
 479
 480         return 0;
 481 }
 482
 483 static int vnic_dev_cmd_no_proxy(struct vnic_dev *vdev,
 484         enum vnic_devcmd_cmd cmd, u64 *a0, u64 *a1, int wait)
 485 {
 486         int err;
 487
 488         vdev->args[0] = *a0;
 489         vdev->args[1] = *a1;
 490
 491         err = vdev->devcmd_rtn(vdev, cmd, wait);
 492
 493         *a0 = vdev->args[0];
 494         *a1 = vdev->args[1];
 495
 496         return err;
 497 }
 498
 499 void vnic_dev_cmd_proxy_by_index_start(struct vnic_dev *vdev, u16 index)
 500 {
 501         vdev->proxy = PROXY_BY_INDEX;
 502         vdev->proxy_index = index;
 503 }
 504
 505 void vnic_dev_cmd_proxy_end(struct vnic_dev *vdev)
 506 {
 507         vdev->proxy = PROXY_NONE;
 508         vdev->proxy_index = 0;
 509 }
 510
 511 int vnic_dev_cmd(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd,
 512         u64 *a0, u64 *a1, int wait)
 513 {
 514         memset(vdev->args, 0, sizeof(vdev->args));
 515
 516         switch (vdev->proxy) {
 517         case PROXY_BY_INDEX:
 518                 return vnic_dev_cmd_proxy(vdev, CMD_PROXY_BY_INDEX, cmd,
 519                                 a0, a1, wait);
 520         case PROXY_BY_BDF:
 521                 return vnic_dev_cmd_proxy(vdev, CMD_PROXY_BY_BDF, cmd,
 522                                 a0, a1, wait);
 523         case PROXY_NONE:
 524         default:
 525                 return vnic_dev_cmd_no_proxy(vdev, cmd, a0, a1, wait);
 526         }
 527 }
 528
 529 static int vnic_dev_capable(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd)
 530 {
 531         u64 a0 = (u32)cmd, a1 = 0;
 532         int wait = 1000;
 533         int err;
 534
 535         err = vnic_dev_cmd(vdev, CMD_CAPABILITY, &a0, &a1, wait);
 536
 537         return !(err || a0);
 538 }
 539
 540 int vnic_dev_fw_info(struct vnic_dev *vdev,
 541         struct vnic_devcmd_fw_info **fw_info)
 542 {
 543         u64 a0, a1 = 0;
 544         int wait = 1000;
 545         int err = 0;
 546
 547         if (!vdev->fw_info) {
 548                 vdev->fw_info = pci_zalloc_consistent(vdev->pdev,
 549                                                       sizeof(struct vnic_devcmd_fw_info),
 550                                                       &vdev->fw_info_pa);
 551                 if (!vdev->fw_info)
 552                         return -ENOMEM;
 553
 554                 a0 = vdev->fw_info_pa;
 555                 a1 = sizeof(struct vnic_devcmd_fw_info);
 556
 557                 /* only get fw_info once and cache it */
 558                 if (vnic_dev_capable(vdev, CMD_MCPU_FW_INFO))
 559                         err = vnic_dev_cmd(vdev, CMD_MCPU_FW_INFO,
 560                                 &a0, &a1, wait);
 561                 else
 562                         err = vnic_dev_cmd(vdev, CMD_MCPU_FW_INFO_OLD,
 563                                 &a0, &a1, wait);
 564         }
 565
 566         *fw_info = vdev->fw_info;
 567
 568         return err;
 569 }
 570
 571 int vnic_dev_spec(struct vnic_dev *vdev, unsigned int offset, unsigned int size,
 572         void *value)
 573 {
 574         u64 a0, a1;
 575         int wait = 1000;
 576         int err;
 577
 578         a0 = offset;
 579         a1 = size;
 580
 581         err = vnic_dev_cmd(vdev, CMD_DEV_SPEC, &a0, &a1, wait);
 582
 583         switch (size) {
 584         case 1: *(u8 *)value = (u8)a0; break;
 585         case 2: *(u16 *)value = (u16)a0; break;
 586         case 4: *(u32 *)value = (u32)a0; break;
 587         case 8: *(u64 *)value = a0; break;
 588         default: BUG(); break;
 589         }
 590
 591         return err;
 592 }
 593
 594 int vnic_dev_stats_dump(struct vnic_dev *vdev, struct vnic_stats **stats)
 595 {
 596         u64 a0, a1;
 597         int wait = 1000;
 598
 599         if (!vdev->stats) {
 600                 vdev->stats = pci_alloc_consistent(vdev->pdev,
 601                         sizeof(struct vnic_stats), &vdev->stats_pa);
 602                 if (!vdev->stats)
 603                         return -ENOMEM;
 604         }
 605
 606         *stats = vdev->stats;
 607         a0 = vdev->stats_pa;
 608         a1 = sizeof(struct vnic_stats);
 609
 610         return vnic_dev_cmd(vdev, CMD_STATS_DUMP, &a0, &a1, wait);
 611 }
 612
 613 int vnic_dev_close(struct vnic_dev *vdev)
 614 {
 615         u64 a0 = 0, a1 = 0;
 616         int wait = 1000;
 617         return vnic_dev_cmd(vdev, CMD_CLOSE, &a0, &a1, wait);
 618 }
 619
 620 int vnic_dev_enable_wait(struct vnic_dev *vdev)
 621 {
 622         u64 a0 = 0, a1 = 0;
 623         int wait = 1000;
 624
 625         if (vnic_dev_capable(vdev, CMD_ENABLE_WAIT))
 626                 return vnic_dev_cmd(vdev, CMD_ENABLE_WAIT, &a0, &a1, wait);
 627         else
 628                 return vnic_dev_cmd(vdev, CMD_ENABLE, &a0, &a1, wait);
 629 }
 630
 631 int vnic_dev_disable(struct vnic_dev *vdev)
 632 {
 633         u64 a0 = 0, a1 = 0;
 634         int wait = 1000;
 635         return vnic_dev_cmd(vdev, CMD_DISABLE, &a0, &a1, wait);
 636 }
 637
 638 int vnic_dev_open(struct vnic_dev *vdev, int arg)
 639 {
 640         u64 a0 = (u32)arg, a1 = 0;
 641         int wait = 1000;
 642         return vnic_dev_cmd(vdev, CMD_OPEN, &a0, &a1, wait);
 643 }
 644
 645 int vnic_dev_open_done(struct vnic_dev *vdev, int *done)
 646 {
 647         u64 a0 = 0, a1 = 0;
 648         int wait = 1000;
 649         int err;
 650
 651         *done = 0;
 652
 653         err = vnic_dev_cmd(vdev, CMD_OPEN_STATUS, &a0, &a1, wait);
 654         if (err)
 655                 return err;
 656
 657         *done = (a0 == 0);
 658
 659         return 0;
 660 }
 661
 662 int vnic_dev_soft_reset(struct vnic_dev *vdev, int arg)
 663 {
 664         u64 a0 = (u32)arg, a1 = 0;
 665         int wait = 1000;
 666         return vnic_dev_cmd(vdev, CMD_SOFT_RESET, &a0, &a1, wait);
 667 }
 668
 669 int vnic_dev_soft_reset_done(struct vnic_dev *vdev, int *done)
 670 {
 671         u64 a0 = 0, a1 = 0;
 672         int wait = 1000;
 673         int err;
 674
 675         *done = 0;
 676
 677         err = vnic_dev_cmd(vdev, CMD_SOFT_RESET_STATUS, &a0, &a1, wait);
 678         if (err)
 679                 return err;
 680
 681         *done = (a0 == 0);
 682
 683         return 0;
 684 }
 685
 686 int vnic_dev_hang_reset(struct vnic_dev *vdev, int arg)
 687 {
 688         u64 a0 = (u32)arg, a1 = 0;
 689         int wait = 1000;
 690         int err;
 691
 692         if (vnic_dev_capable(vdev, CMD_HANG_RESET)) {
 693                 return vnic_dev_cmd(vdev, CMD_HANG_RESET,
 694                                 &a0, &a1, wait);
 695         } else {
 696                 err = vnic_dev_soft_reset(vdev, arg);
 697                 if (err)
 698                         return err;
 699                 return vnic_dev_init(vdev, 0);
 700         }
 701 }
 702
 703 int vnic_dev_hang_reset_done(struct vnic_dev *vdev, int *done)
 704 {
 705         u64 a0 = 0, a1 = 0;
 706         int wait = 1000;
 707         int err;
 708
 709         *done = 0;
 710
 711         if (vnic_dev_capable(vdev, CMD_HANG_RESET_STATUS)) {
 712                 err = vnic_dev_cmd(vdev, CMD_HANG_RESET_STATUS,
 713                                 &a0, &a1, wait);
 714                 if (err)
 715                         return err;
 716         } else {
 717                 return vnic_dev_soft_reset_done(vdev, done);
 718         }
 719
 720         *done = (a0 == 0);
 721
 722         return 0;
 723 }
 724
 725 int vnic_dev_hang_notify(struct vnic_dev *vdev)
 726 {
 727         u64 a0, a1;
 728         int wait = 1000;
 729         return vnic_dev_cmd(vdev, CMD_HANG_NOTIFY, &a0, &a1, wait);
 730 }
 731
 732 int vnic_dev_get_mac_addr(struct vnic_dev *vdev, u8 *mac_addr)
 733 {
 734         u64 a0, a1;
 735         int wait = 1000;
 736         int err, i;
 737
 738         for (i = 0; i < ETH_ALEN; i++)
 739                 mac_addr[i] = 0;
 740
 741         err = vnic_dev_cmd(vdev, CMD_GET_MAC_ADDR, &a0, &a1, wait);
 742         if (err)
 743                 return err;
 744
 745         for (i = 0; i < ETH_ALEN; i++)
 746                 mac_addr[i] = ((u8 *)&a0)[i];
 747
 748         return 0;
 749 }
 750
 751 int vnic_dev_packet_filter(struct vnic_dev *vdev, int directed, int multicast,
 752         int broadcast, int promisc, int allmulti)
 753 {
 754         u64 a0, a1 = 0;
 755         int wait = 1000;
 756         int err;
 757
 758         a0 = (directed ? CMD_PFILTER_DIRECTED : 0) |
 759              (multicast ? CMD_PFILTER_MULTICAST : 0) |
 760              (broadcast ? CMD_PFILTER_BROADCAST : 0) |
 761              (promisc ? CMD_PFILTER_PROMISCUOUS : 0) |
 762              (allmulti ? CMD_PFILTER_ALL_MULTICAST : 0);
 763
 764         err = vnic_dev_cmd(vdev, CMD_PACKET_FILTER, &a0, &a1, wait);
 765         if (err)
 766                 vdev_neterr("Can't set packet filter\n");
 767
 768         return err;
 769 }
 770
 771 int vnic_dev_add_addr(struct vnic_dev *vdev, const u8 *addr)
 772 {
 773         u64 a0 = 0, a1 = 0;
 774         int wait = 1000;
 775         int err;
 776         int i;
 777
 778         for (i = 0; i < ETH_ALEN; i++)
 779                 ((u8 *)&a0)[i] = addr[i];
 780
 781         err = vnic_dev_cmd(vdev, CMD_ADDR_ADD, &a0, &a1, wait);
 782         if (err)
 783                 vdev_neterr("Can't add addr [%pM], %d\n", addr, err);
 784
 785         return err;
 786 }
 787
 788 int vnic_dev_del_addr(struct vnic_dev *vdev, const u8 *addr)
 789 {
 790         u64 a0 = 0, a1 = 0;
 791         int wait = 1000;
 792         int err;
 793         int i;
 794
 795         for (i = 0; i < ETH_ALEN; i++)
 796                 ((u8 *)&a0)[i] = addr[i];
 797
 798         err = vnic_dev_cmd(vdev, CMD_ADDR_DEL, &a0, &a1, wait);
 799         if (err)
 800                 vdev_neterr("Can't del addr [%pM], %d\n", addr, err);
 801
 802         return err;
 803 }
 804
 805 int vnic_dev_set_ig_vlan_rewrite_mode(struct vnic_dev *vdev,
 806         u8 ig_vlan_rewrite_mode)
 807 {
 808         u64 a0 = ig_vlan_rewrite_mode, a1 = 0;
 809         int wait = 1000;
 810
 811         if (vnic_dev_capable(vdev, CMD_IG_VLAN_REWRITE_MODE))
 812                 return vnic_dev_cmd(vdev, CMD_IG_VLAN_REWRITE_MODE,
 813                                 &a0, &a1, wait);
 814         else
 815                 return 0;
 816 }
 817
 818 static int vnic_dev_notify_setcmd(struct vnic_dev *vdev,
 819         void *notify_addr, dma_addr_t notify_pa, u16 intr)
 820 {
 821         u64 a0, a1;
 822         int wait = 1000;
 823         int r;
 824
 825         memset(notify_addr, 0, sizeof(struct vnic_devcmd_notify));
 826         vdev->notify = notify_addr;
 827         vdev->notify_pa = notify_pa;
 828
 829         a0 = (u64)notify_pa;
 830         a1 = ((u64)intr << 32) & 0x0000ffff00000000ULL;
 831         a1 += sizeof(struct vnic_devcmd_notify);
 832
 833         r = vnic_dev_cmd(vdev, CMD_NOTIFY, &a0, &a1, wait);
 834         vdev->notify_sz = (r == 0) ? (u32)a1 : 0;
 835         return r;
 836 }
 837
 838 int vnic_dev_notify_set(struct vnic_dev *vdev, u16 intr)
 839 {
 840         void *notify_addr;
 841         dma_addr_t notify_pa;
 842
 843         if (vdev->notify || vdev->notify_pa) {
 844                 vdev_neterr("notify block %p still allocated", vdev->notify);
 845                 return -EINVAL;
 846         }
 847
 848         notify_addr = pci_alloc_consistent(vdev->pdev,
 849                         sizeof(struct vnic_devcmd_notify),
 850                         &notify_pa);
 851         if (!notify_addr)
 852                 return -ENOMEM;
 853
 854         return vnic_dev_notify_setcmd(vdev, notify_addr, notify_pa, intr);
 855 }
 856
 857 static int vnic_dev_notify_unsetcmd(struct vnic_dev *vdev)
 858 {
 859         u64 a0, a1;
 860         int wait = 1000;
 861         int err;
 862
 863         a0 = 0;  /* paddr = 0 to unset notify buffer */
 864         a1 = 0x0000ffff00000000ULL; /* intr num = -1 to unreg for intr */
 865         a1 += sizeof(struct vnic_devcmd_notify);
 866
 867         err = vnic_dev_cmd(vdev, CMD_NOTIFY, &a0, &a1, wait);
 868         vdev->notify = NULL;
 869         vdev->notify_pa = 0;
 870         vdev->notify_sz = 0;
 871
 872         return err;
 873 }
 874
 875 int vnic_dev_notify_unset(struct vnic_dev *vdev)
 876 {
 877         if (vdev->notify) {
 878                 pci_free_consistent(vdev->pdev,
 879                         sizeof(struct vnic_devcmd_notify),
 880                         vdev->notify,
 881                         vdev->notify_pa);
 882         }
 883
 884         return vnic_dev_notify_unsetcmd(vdev);
 885 }
 886
 887 static int vnic_dev_notify_ready(struct vnic_dev *vdev)
 888 {
 889         u32 *words;
 890         unsigned int nwords = vdev->notify_sz / 4;
 891         unsigned int i;
 892         u32 csum;
 893
 894         if (!vdev->notify || !vdev->notify_sz)
 895                 return 0;
 896
 897         do {
 898                 csum = 0;
 899                 memcpy(&vdev->notify_copy, vdev->notify, vdev->notify_sz);
 900                 words = (u32 *)&vdev->notify_copy;
 901                 for (i = 1; i < nwords; i++)
 902                         csum += words[i];
 903         } while (csum != words[0]);
 904
 905         return 1;
 906 }
 907
 908 int vnic_dev_init(struct vnic_dev *vdev, int arg)
 909 {
 910         u64 a0 = (u32)arg, a1 = 0;
 911         int wait = 1000;
 912         int r = 0;
 913
 914         if (vnic_dev_capable(vdev, CMD_INIT))
 915                 r = vnic_dev_cmd(vdev, CMD_INIT, &a0, &a1, wait);
 916         else {
 917                 vnic_dev_cmd(vdev, CMD_INIT_v1, &a0, &a1, wait);
 918                 if (a0 & CMD_INITF_DEFAULT_MAC) {
 919                         /* Emulate these for old CMD_INIT_v1 which
 920                          * didn't pass a0 so no CMD_INITF_*.
 921                          */
 922                         vnic_dev_cmd(vdev, CMD_GET_MAC_ADDR, &a0, &a1, wait);
 923                         vnic_dev_cmd(vdev, CMD_ADDR_ADD, &a0, &a1, wait);
 924                 }
 925         }
 926         return r;
 927 }
 928
 929 int vnic_dev_deinit(struct vnic_dev *vdev)
 930 {
 931         u64 a0 = 0, a1 = 0;
 932         int wait = 1000;
 933
 934         return vnic_dev_cmd(vdev, CMD_DEINIT, &a0, &a1, wait);
 935 }
 936
 937 void vnic_dev_intr_coal_timer_info_default(struct vnic_dev *vdev)
 938 {
 939         /* Default: hardware intr coal timer is in units of 1.5 usecs */
 940         vdev->intr_coal_timer_info.mul = 2;
 941         vdev->intr_coal_timer_info.div = 3;
 942         vdev->intr_coal_timer_info.max_usec =
 943                 vnic_dev_intr_coal_timer_hw_to_usec(vdev, 0xffff);
 944 }
 945
 946 int vnic_dev_intr_coal_timer_info(struct vnic_dev *vdev)
 947 {
 948         int wait = 1000;
 949         int err;
 950
 951         memset(vdev->args, 0, sizeof(vdev->args));
 952
 953         if (vnic_dev_capable(vdev, CMD_INTR_COAL_CONVERT))
 954                 err = vdev->devcmd_rtn(vdev, CMD_INTR_COAL_CONVERT, wait);
 955         else
 956                 err = ERR_ECMDUNKNOWN;
 957
 958         /* Use defaults when firmware doesn't support the devcmd at all or
 959          * supports it for only specific hardware
 960          */
 961         if ((err == ERR_ECMDUNKNOWN) ||
 962                 (!err && !(vdev->args[0] && vdev->args[1] && vdev->args[2]))) {
 963                 vdev_netwarn("Using default conversion factor for interrupt coalesce timer\n");
 964                 vnic_dev_intr_coal_timer_info_default(vdev);
 965                 return 0;
 966         }
 967
 968         if (!err) {
 969                 vdev->intr_coal_timer_info.mul = (u32) vdev->args[0];
 970                 vdev->intr_coal_timer_info.div = (u32) vdev->args[1];
 971                 vdev->intr_coal_timer_info.max_usec = (u32) vdev->args[2];
 972         }
 973
 974         return err;
 975 }
 976
 977 int vnic_dev_link_status(struct vnic_dev *vdev)
 978 {
 979         if (!vnic_dev_notify_ready(vdev))
 980                 return 0;
 981
 982         return vdev->notify_copy.link_state;
 983 }
 984
 985 u32 vnic_dev_port_speed(struct vnic_dev *vdev)
 986 {
 987         if (!vnic_dev_notify_ready(vdev))
 988                 return 0;
 989
 990         return vdev->notify_copy.port_speed;
 991 }
 992
 993 u32 vnic_dev_msg_lvl(struct vnic_dev *vdev)
 994 {
 995         if (!vnic_dev_notify_ready(vdev))
 996                 return 0;
 997
 998         return vdev->notify_copy.msglvl;
 999 }
1000
1001 u32 vnic_dev_mtu(struct vnic_dev *vdev)
1002 {
1003         if (!vnic_dev_notify_ready(vdev))
1004                 return 0;
1005
1006         return vdev->notify_copy.mtu;
1007 }
1008
1009 void vnic_dev_set_intr_mode(struct vnic_dev *vdev,
1010         enum vnic_dev_intr_mode intr_mode)
1011 {
1012         vdev->intr_mode = intr_mode;
1013 }
1014
1015 enum vnic_dev_intr_mode vnic_dev_get_intr_mode(
1016         struct vnic_dev *vdev)
1017 {
1018         return vdev->intr_mode;
1019 }
1020
1021 u32 vnic_dev_intr_coal_timer_usec_to_hw(struct vnic_dev *vdev, u32 usec)
1022 {
1023         return (usec * vdev->intr_coal_timer_info.mul) /
1024                 vdev->intr_coal_timer_info.div;
1025 }
1026
1027 u32 vnic_dev_intr_coal_timer_hw_to_usec(struct vnic_dev *vdev, u32 hw_cycles)
1028 {
1029         return (hw_cycles * vdev->intr_coal_timer_info.div) /
1030                 vdev->intr_coal_timer_info.mul;
1031 }
1032
1033 u32 vnic_dev_get_intr_coal_timer_max(struct vnic_dev *vdev)
1034 {
1035         return vdev->intr_coal_timer_info.max_usec;
1036 }
1037
1038 void vnic_dev_unregister(struct vnic_dev *vdev)
1039 {
1040         if (vdev) {
1041                 if (vdev->notify)
1042                         pci_free_consistent(vdev->pdev,
1043                                 sizeof(struct vnic_devcmd_notify),
1044                                 vdev->notify,
1045                                 vdev->notify_pa);
1046                 if (vdev->stats)
1047                         pci_free_consistent(vdev->pdev,
1048                                 sizeof(struct vnic_stats),
1049                                 vdev->stats, vdev->stats_pa);
1050                 if (vdev->fw_info)
1051                         pci_free_consistent(vdev->pdev,
1052                                 sizeof(struct vnic_devcmd_fw_info),
1053                                 vdev->fw_info, vdev->fw_info_pa);
1054                 if (vdev->devcmd2)
1055                         vnic_dev_deinit_devcmd2(vdev);
1056
1057                 kfree(vdev);
1058         }
1059 }
1060 EXPORT_SYMBOL(vnic_dev_unregister);
1061
1062 struct vnic_dev *vnic_dev_register(struct vnic_dev *vdev,
1063         void *priv, struct pci_dev *pdev, struct vnic_dev_bar *bar,
1064         unsigned int num_bars)
1065 {
1066         if (!vdev) {
1067                 vdev = kzalloc(sizeof(struct vnic_dev), GFP_ATOMIC);
1068                 if (!vdev)
1069                         return NULL;
1070         }
1071
1072         vdev->priv = priv;
1073         vdev->pdev = pdev;
1074
1075         if (vnic_dev_discover_res(vdev, bar, num_bars))
1076                 goto err_out;
1077
1078         return vdev;
1079
1080 err_out:
1081         vnic_dev_unregister(vdev);
1082         return NULL;
1083 }
1084 EXPORT_SYMBOL(vnic_dev_register);
1085
1086 struct pci_dev *vnic_dev_get_pdev(struct vnic_dev *vdev)
1087 {
1088         return vdev->pdev;
1089 }
1090 EXPORT_SYMBOL(vnic_dev_get_pdev);
1091
1092 int vnic_devcmd_init(struct vnic_dev *vdev)
1093 {
1094         void __iomem *res;
1095         int err;
1096
1097         res = vnic_dev_get_res(vdev, RES_TYPE_DEVCMD2, 0);
1098         if (res) {
1099                 err = vnic_dev_init_devcmd2(vdev);
1100                 if (err)
1101                         vdev_warn("DEVCMD2 init failed: %d, Using DEVCMD1",
1102                                   err);
1103                 else
1104                         return 0;
1105         } else {
1106                 vdev_warn("DEVCMD2 resource not found (old firmware?) Using DEVCMD1\n");
1107         }
1108         err = vnic_dev_init_devcmd1(vdev);
1109         if (err)
1110                 vdev_err("DEVCMD1 initialization failed: %d", err);
1111
1112         return err;
1113 }
1114
1115 int vnic_dev_init_prov2(struct vnic_dev *vdev, u8 *buf, u32 len)
1116 {
1117         u64 a0, a1 = len;
1118         int wait = 1000;
1119         dma_addr_t prov_pa;
1120         void *prov_buf;
1121         int ret;
1122
1123         prov_buf = pci_alloc_consistent(vdev->pdev, len, &prov_pa);
1124         if (!prov_buf)
1125                 return -ENOMEM;
1126
1127         memcpy(prov_buf, buf, len);
1128
1129         a0 = prov_pa;
1130
1131         ret = vnic_dev_cmd(vdev, CMD_INIT_PROV_INFO2, &a0, &a1, wait);
1132
1133         pci_free_consistent(vdev->pdev, len, prov_buf, prov_pa);
1134
1135         return ret;
1136 }
1137
1138 int vnic_dev_enable2(struct vnic_dev *vdev, int active)
1139 {
1140         u64 a0, a1 = 0;
1141         int wait = 1000;
1142
1143         a0 = (active ? CMD_ENABLE2_ACTIVE : 0);
1144
1145         return vnic_dev_cmd(vdev, CMD_ENABLE2, &a0, &a1, wait);
1146 }
1147
1148 static int vnic_dev_cmd_status(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd,
1149         int *status)
1150 {
1151         u64 a0 = cmd, a1 = 0;
1152         int wait = 1000;
1153         int ret;
1154
1155         ret = vnic_dev_cmd(vdev, CMD_STATUS, &a0, &a1, wait);
1156         if (!ret)
1157                 *status = (int)a0;
1158
1159         return ret;
1160 }
1161
1162 int vnic_dev_enable2_done(struct vnic_dev *vdev, int *status)
1163 {
1164         return vnic_dev_cmd_status(vdev, CMD_ENABLE2, status);
1165 }
1166
1167 int vnic_dev_deinit_done(struct vnic_dev *vdev, int *status)
1168 {
1169         return vnic_dev_cmd_status(vdev, CMD_DEINIT, status);
1170 }
1171
1172 int vnic_dev_set_mac_addr(struct vnic_dev *vdev, u8 *mac_addr)
1173 {
1174         u64 a0, a1;
1175         int wait = 1000;
1176         int i;
1177
1178         for (i = 0; i < ETH_ALEN; i++)
1179                 ((u8 *)&a0)[i] = mac_addr[i];
1180
1181         return vnic_dev_cmd(vdev, CMD_SET_MAC_ADDR, &a0, &a1, wait);
1182 }
1183
1184 /* vnic_dev_classifier: Add/Delete classifier entries
1185  * @vdev: vdev of the device
1186  * @cmd: CLSF_ADD for Add filter
1187  *       CLSF_DEL for Delete filter
1188  * @entry: In case of ADD filter, the caller passes the RQ number in this
1189  *         variable.
1190  *
1191  *         This function stores the filter_id returned by the firmware in the
1192  *         same variable before return;
1193  *
1194  *         In case of DEL filter, the caller passes the RQ number. Return
1195  *         value is irrelevant.
1196  * @data: filter data
1197  */
1198 int vnic_dev_classifier(struct vnic_dev *vdev, u8 cmd, u16 *entry,
1199                         struct filter *data)
1200 {
1201         u64 a0, a1;
1202         int wait = 1000;
1203         dma_addr_t tlv_pa;
1204         int ret = -EINVAL;
1205         struct filter_tlv *tlv, *tlv_va;
1206         struct filter_action *action;
1207         u64 tlv_size;
1208
1209         if (cmd == CLSF_ADD) {
1210                 tlv_size = sizeof(struct filter) +
1211                            sizeof(struct filter_action) +
1212                            2 * sizeof(struct filter_tlv);
1213                 tlv_va = pci_alloc_consistent(vdev->pdev, tlv_size, &tlv_pa);
1214                 if (!tlv_va)
1215                         return -ENOMEM;
1216                 tlv = tlv_va;
1217                 a0 = tlv_pa;
1218                 a1 = tlv_size;
1219                 memset(tlv, 0, tlv_size);
1220                 tlv->type = CLSF_TLV_FILTER;
1221                 tlv->length = sizeof(struct filter);
1222                 *(struct filter *)&tlv->val = *data;
1223
1224                 tlv = (struct filter_tlv *)((char *)tlv +
1225                                             sizeof(struct filter_tlv) +
1226                                             sizeof(struct filter));
1227
1228                 tlv->type = CLSF_TLV_ACTION;
1229                 tlv->length = sizeof(struct filter_action);
1230                 action = (struct filter_action *)&tlv->val;
1231                 action->type = FILTER_ACTION_RQ_STEERING;
1232                 action->u.rq_idx = *entry;
1233
1234                 ret = vnic_dev_cmd(vdev, CMD_ADD_FILTER, &a0, &a1, wait);
1235                 *entry = (u16)a0;
1236                 pci_free_consistent(vdev->pdev, tlv_size, tlv_va, tlv_pa);
1237         } else if (cmd == CLSF_DEL) {
1238                 a0 = *entry;
1239                 ret = vnic_dev_cmd(vdev, CMD_DEL_FILTER, &a0, &a1, wait);
1240         }
1241
1242         return ret;
1243 }