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_stats.h"
  31
  32 enum vnic_proxy_type {
  33         PROXY_NONE,
  34         PROXY_BY_BDF,
  35 };
  36
  37 struct vnic_res {
  38         void __iomem *vaddr;
  39         dma_addr_t bus_addr;
  40         unsigned int count;
  41 };
  42
  43 struct vnic_intr_coal_timer_info {
  44         u32 mul;
  45         u32 div;
  46         u32 max_usec;
  47 };
  48
  49 struct vnic_dev {
  50         void *priv;
  51         struct pci_dev *pdev;
  52         struct vnic_res res[RES_TYPE_MAX];
  53         enum vnic_dev_intr_mode intr_mode;
  54         struct vnic_devcmd __iomem *devcmd;
  55         struct vnic_devcmd_notify *notify;
  56         struct vnic_devcmd_notify notify_copy;
  57         dma_addr_t notify_pa;
  58         u32 notify_sz;
  59         dma_addr_t linkstatus_pa;
  60         struct vnic_stats *stats;
  61         dma_addr_t stats_pa;
  62         struct vnic_devcmd_fw_info *fw_info;
  63         dma_addr_t fw_info_pa;
  64         enum vnic_proxy_type proxy;
  65         u32 proxy_index;
  66         u64 args[VNIC_DEVCMD_NARGS];
  67         struct vnic_intr_coal_timer_info intr_coal_timer_info;
  68 };
  69
  70 #define VNIC_MAX_RES_HDR_SIZE \
  71         (sizeof(struct vnic_resource_header) + \
  72         sizeof(struct vnic_resource) * RES_TYPE_MAX)
  73 #define VNIC_RES_STRIDE 128
  74
  75 void *vnic_dev_priv(struct vnic_dev *vdev)
  76 {
  77         return vdev->priv;
  78 }
  79
  80 static int vnic_dev_discover_res(struct vnic_dev *vdev,
  81         struct vnic_dev_bar *bar, unsigned int num_bars)
  82 {
  83         struct vnic_resource_header __iomem *rh;
  84         struct mgmt_barmap_hdr __iomem *mrh;
  85         struct vnic_resource __iomem *r;
  86         u8 type;
  87
  88         if (num_bars == 0)
  89                 return -EINVAL;
  90
  91         if (bar->len < VNIC_MAX_RES_HDR_SIZE) {
  92                 pr_err("vNIC BAR0 res hdr length error\n");
  93                 return -EINVAL;
  94         }
  95
  96         rh  = bar->vaddr;
  97         mrh = bar->vaddr;
  98         if (!rh) {
  99                 pr_err("vNIC BAR0 res hdr not mem-mapped\n");
 100                 return -EINVAL;
 101         }
 102
 103         /* Check for mgmt vnic in addition to normal vnic */
 104         if ((ioread32(&rh->magic) != VNIC_RES_MAGIC) ||
 105                 (ioread32(&rh->version) != VNIC_RES_VERSION)) {
 106                 if ((ioread32(&mrh->magic) != MGMTVNIC_MAGIC) ||
 107                         (ioread32(&mrh->version) != MGMTVNIC_VERSION)) {
 108                         pr_err("vNIC BAR0 res magic/version error "
 109                         "exp (%lx/%lx) or (%lx/%lx), curr (%x/%x)\n",
 110                         VNIC_RES_MAGIC, VNIC_RES_VERSION,
 111                         MGMTVNIC_MAGIC, MGMTVNIC_VERSION,
 112                         ioread32(&rh->magic), ioread32(&rh->version));
 113                         return -EINVAL;
 114                 }
 115         }
 116
 117         if (ioread32(&mrh->magic) == MGMTVNIC_MAGIC)
 118                 r = (struct vnic_resource __iomem *)(mrh + 1);
 119         else
 120                 r = (struct vnic_resource __iomem *)(rh + 1);
 121
 122
 123         while ((type = ioread8(&r->type)) != RES_TYPE_EOL) {
 124
 125                 u8 bar_num = ioread8(&r->bar);
 126                 u32 bar_offset = ioread32(&r->bar_offset);
 127                 u32 count = ioread32(&r->count);
 128                 u32 len;
 129
 130                 r++;
 131
 132                 if (bar_num >= num_bars)
 133                         continue;
 134
 135                 if (!bar[bar_num].len || !bar[bar_num].vaddr)
 136                         continue;
 137
 138                 switch (type) {
 139                 case RES_TYPE_WQ:
 140                 case RES_TYPE_RQ:
 141                 case RES_TYPE_CQ:
 142                 case RES_TYPE_INTR_CTRL:
 143                         /* each count is stride bytes long */
 144                         len = count * VNIC_RES_STRIDE;
 145                         if (len + bar_offset > bar[bar_num].len) {
 146                                 pr_err("vNIC BAR0 resource %d "
 147                                         "out-of-bounds, offset 0x%x + "
 148                                         "size 0x%x > bar len 0x%lx\n",
 149                                         type, bar_offset,
 150                                         len,
 151                                         bar[bar_num].len);
 152                                 return -EINVAL;
 153                         }
 154                         break;
 155                 case RES_TYPE_INTR_PBA_LEGACY:
 156                 case RES_TYPE_DEVCMD:
 157                         len = count;
 158                         break;
 159                 default:
 160                         continue;
 161                 }
 162
 163                 vdev->res[type].count = count;
 164                 vdev->res[type].vaddr = (char __iomem *)bar[bar_num].vaddr +
 165                         bar_offset;
 166                 vdev->res[type].bus_addr = bar[bar_num].bus_addr + bar_offset;
 167         }
 168
 169         return 0;
 170 }
 171
 172 unsigned int vnic_dev_get_res_count(struct vnic_dev *vdev,
 173         enum vnic_res_type type)
 174 {
 175         return vdev->res[type].count;
 176 }
 177
 178 void __iomem *vnic_dev_get_res(struct vnic_dev *vdev, enum vnic_res_type type,
 179         unsigned int index)
 180 {
 181         if (!vdev->res[type].vaddr)
 182                 return NULL;
 183
 184         switch (type) {
 185         case RES_TYPE_WQ:
 186         case RES_TYPE_RQ:
 187         case RES_TYPE_CQ:
 188         case RES_TYPE_INTR_CTRL:
 189                 return (char __iomem *)vdev->res[type].vaddr +
 190                         index * VNIC_RES_STRIDE;
 191         default:
 192                 return (char __iomem *)vdev->res[type].vaddr;
 193         }
 194 }
 195
 196 static unsigned int vnic_dev_desc_ring_size(struct vnic_dev_ring *ring,
 197         unsigned int desc_count, unsigned int desc_size)
 198 {
 199         /* The base address of the desc rings must be 512 byte aligned.
 200          * Descriptor count is aligned to groups of 32 descriptors.  A
 201          * count of 0 means the maximum 4096 descriptors.  Descriptor
 202          * size is aligned to 16 bytes.
 203          */
 204
 205         unsigned int count_align = 32;
 206         unsigned int desc_align = 16;
 207
 208         ring->base_align = 512;
 209
 210         if (desc_count == 0)
 211                 desc_count = 4096;
 212
 213         ring->desc_count = ALIGN(desc_count, count_align);
 214
 215         ring->desc_size = ALIGN(desc_size, desc_align);
 216
 217         ring->size = ring->desc_count * ring->desc_size;
 218         ring->size_unaligned = ring->size + ring->base_align;
 219
 220         return ring->size_unaligned;
 221 }
 222
 223 void vnic_dev_clear_desc_ring(struct vnic_dev_ring *ring)
 224 {
 225         memset(ring->descs, 0, ring->size);
 226 }
 227
 228 int vnic_dev_alloc_desc_ring(struct vnic_dev *vdev, struct vnic_dev_ring *ring,
 229         unsigned int desc_count, unsigned int desc_size)
 230 {
 231         vnic_dev_desc_ring_size(ring, desc_count, desc_size);
 232
 233         ring->descs_unaligned = pci_alloc_consistent(vdev->pdev,
 234                 ring->size_unaligned,
 235                 &ring->base_addr_unaligned);
 236
 237         if (!ring->descs_unaligned) {
 238                 pr_err("Failed to allocate ring (size=%d), aborting\n",
 239                         (int)ring->size);
 240                 return -ENOMEM;
 241         }
 242
 243         ring->base_addr = ALIGN(ring->base_addr_unaligned,
 244                 ring->base_align);
 245         ring->descs = (u8 *)ring->descs_unaligned +
 246                 (ring->base_addr - ring->base_addr_unaligned);
 247
 248         vnic_dev_clear_desc_ring(ring);
 249
 250         ring->desc_avail = ring->desc_count - 1;
 251
 252         return 0;
 253 }
 254
 255 void vnic_dev_free_desc_ring(struct vnic_dev *vdev, struct vnic_dev_ring *ring)
 256 {
 257         if (ring->descs) {
 258                 pci_free_consistent(vdev->pdev,
 259                         ring->size_unaligned,
 260                         ring->descs_unaligned,
 261                         ring->base_addr_unaligned);
 262                 ring->descs = NULL;
 263         }
 264 }
 265
 266 static int _vnic_dev_cmd(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd,
 267         int wait)
 268 {
 269         struct vnic_devcmd __iomem *devcmd = vdev->devcmd;
 270         unsigned int i;
 271         int delay;
 272         u32 status;
 273         int err;
 274
 275         status = ioread32(&devcmd->status);
 276         if (status == 0xFFFFFFFF) {
 277                 /* PCI-e target device is gone */
 278                 return -ENODEV;
 279         }
 280         if (status & STAT_BUSY) {
 281                 pr_err("Busy devcmd %d\n", _CMD_N(cmd));
 282                 return -EBUSY;
 283         }
 284
 285         if (_CMD_DIR(cmd) & _CMD_DIR_WRITE) {
 286                 for (i = 0; i < VNIC_DEVCMD_NARGS; i++)
 287                         writeq(vdev->args[i], &devcmd->args[i]);
 288                 wmb();
 289         }
 290
 291         iowrite32(cmd, &devcmd->cmd);
 292
 293         if ((_CMD_FLAGS(cmd) & _CMD_FLAGS_NOWAIT))
 294                 return 0;
 295
 296         for (delay = 0; delay < wait; delay++) {
 297
 298                 udelay(100);
 299
 300                 status = ioread32(&devcmd->status);
 301                 if (status == 0xFFFFFFFF) {
 302                         /* PCI-e target device is gone */
 303                         return -ENODEV;
 304                 }
 305
 306                 if (!(status & STAT_BUSY)) {
 307
 308                         if (status & STAT_ERROR) {
 309                                 err = (int)readq(&devcmd->args[0]);
 310                                 if (err != ERR_ECMDUNKNOWN ||
 311                                     cmd != CMD_CAPABILITY)
 312                                         pr_err("Error %d devcmd %d\n",
 313                                                 err, _CMD_N(cmd));
 314                                 return err;
 315                         }
 316
 317                         if (_CMD_DIR(cmd) & _CMD_DIR_READ) {
 318                                 rmb();
 319                                 for (i = 0; i < VNIC_DEVCMD_NARGS; i++)
 320                                         vdev->args[i] = readq(&devcmd->args[i]);
 321                         }
 322
 323                         return 0;
 324                 }
 325         }
 326
 327         pr_err("Timedout devcmd %d\n", _CMD_N(cmd));
 328         return -ETIMEDOUT;
 329 }
 330
 331 static int vnic_dev_cmd_proxy_by_bdf(struct vnic_dev *vdev,
 332         enum vnic_devcmd_cmd cmd, u64 *a0, u64 *a1, int wait)
 333 {
 334         u32 status;
 335         int err;
 336
 337         memset(vdev->args, 0, sizeof(vdev->args));
 338
 339         vdev->args[0] = vdev->proxy_index; /* bdf */
 340         vdev->args[1] = cmd;
 341         vdev->args[2] = *a0;
 342         vdev->args[3] = *a1;
 343
 344         err = _vnic_dev_cmd(vdev, CMD_PROXY_BY_BDF, wait);
 345         if (err)
 346                 return err;
 347
 348         status = (u32)vdev->args[0];
 349         if (status & STAT_ERROR) {
 350                 err = (int)vdev->args[1];
 351                 if (err != ERR_ECMDUNKNOWN ||
 352                     cmd != CMD_CAPABILITY)
 353                         pr_err("Error %d proxy devcmd %d\n", err, _CMD_N(cmd));
 354                 return err;
 355         }
 356
 357         *a0 = vdev->args[1];
 358         *a1 = vdev->args[2];
 359
 360         return 0;
 361 }
 362
 363 static int vnic_dev_cmd_no_proxy(struct vnic_dev *vdev,
 364         enum vnic_devcmd_cmd cmd, u64 *a0, u64 *a1, int wait)
 365 {
 366         int err;
 367
 368         vdev->args[0] = *a0;
 369         vdev->args[1] = *a1;
 370
 371         err = _vnic_dev_cmd(vdev, cmd, wait);
 372
 373         *a0 = vdev->args[0];
 374         *a1 = vdev->args[1];
 375
 376         return err;
 377 }
 378
 379 int vnic_dev_cmd(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd,
 380         u64 *a0, u64 *a1, int wait)
 381 {
 382         memset(vdev->args, 0, sizeof(vdev->args));
 383
 384         switch (vdev->proxy) {
 385         case PROXY_BY_BDF:
 386                 return vnic_dev_cmd_proxy_by_bdf(vdev, cmd, a0, a1, wait);
 387         case PROXY_NONE:
 388         default:
 389                 return vnic_dev_cmd_no_proxy(vdev, cmd, a0, a1, wait);
 390         }
 391 }
 392
 393 static int vnic_dev_capable(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd)
 394 {
 395         u64 a0 = (u32)cmd, a1 = 0;
 396         int wait = 1000;
 397         int err;
 398
 399         err = vnic_dev_cmd(vdev, CMD_CAPABILITY, &a0, &a1, wait);
 400
 401         return !(err || a0);
 402 }
 403
 404 int vnic_dev_fw_info(struct vnic_dev *vdev,
 405         struct vnic_devcmd_fw_info **fw_info)
 406 {
 407         u64 a0, a1 = 0;
 408         int wait = 1000;
 409         int err = 0;
 410
 411         if (!vdev->fw_info) {
 412                 vdev->fw_info = pci_alloc_consistent(vdev->pdev,
 413                         sizeof(struct vnic_devcmd_fw_info),
 414                         &vdev->fw_info_pa);
 415                 if (!vdev->fw_info)
 416                         return -ENOMEM;
 417
 418                 memset(vdev->fw_info, 0, sizeof(struct vnic_devcmd_fw_info));
 419
 420                 a0 = vdev->fw_info_pa;
 421                 a1 = sizeof(struct vnic_devcmd_fw_info);
 422
 423                 /* only get fw_info once and cache it */
 424                 err = vnic_dev_cmd(vdev, CMD_MCPU_FW_INFO, &a0, &a1, wait);
 425                 if (err == ERR_ECMDUNKNOWN) {
 426                         err = vnic_dev_cmd(vdev, CMD_MCPU_FW_INFO_OLD,
 427                                 &a0, &a1, wait);
 428                 }
 429         }
 430
 431         *fw_info = vdev->fw_info;
 432
 433         return err;
 434 }
 435
 436 int vnic_dev_spec(struct vnic_dev *vdev, unsigned int offset, unsigned int size,
 437         void *value)
 438 {
 439         u64 a0, a1;
 440         int wait = 1000;
 441         int err;
 442
 443         a0 = offset;
 444         a1 = size;
 445
 446         err = vnic_dev_cmd(vdev, CMD_DEV_SPEC, &a0, &a1, wait);
 447
 448         switch (size) {
 449         case 1: *(u8 *)value = (u8)a0; break;
 450         case 2: *(u16 *)value = (u16)a0; break;
 451         case 4: *(u32 *)value = (u32)a0; break;
 452         case 8: *(u64 *)value = a0; break;
 453         default: BUG(); break;
 454         }
 455
 456         return err;
 457 }
 458
 459 int vnic_dev_stats_dump(struct vnic_dev *vdev, struct vnic_stats **stats)
 460 {
 461         u64 a0, a1;
 462         int wait = 1000;
 463
 464         if (!vdev->stats) {
 465                 vdev->stats = pci_alloc_consistent(vdev->pdev,
 466                         sizeof(struct vnic_stats), &vdev->stats_pa);
 467                 if (!vdev->stats)
 468                         return -ENOMEM;
 469         }
 470
 471         *stats = vdev->stats;
 472         a0 = vdev->stats_pa;
 473         a1 = sizeof(struct vnic_stats);
 474
 475         return vnic_dev_cmd(vdev, CMD_STATS_DUMP, &a0, &a1, wait);
 476 }
 477
 478 int vnic_dev_close(struct vnic_dev *vdev)
 479 {
 480         u64 a0 = 0, a1 = 0;
 481         int wait = 1000;
 482         return vnic_dev_cmd(vdev, CMD_CLOSE, &a0, &a1, wait);
 483 }
 484
 485 int vnic_dev_enable_wait(struct vnic_dev *vdev)
 486 {
 487         u64 a0 = 0, a1 = 0;
 488         int wait = 1000;
 489         int err;
 490
 491         err = vnic_dev_cmd(vdev, CMD_ENABLE_WAIT, &a0, &a1, wait);
 492         if (err == ERR_ECMDUNKNOWN)
 493                 return vnic_dev_cmd(vdev, CMD_ENABLE, &a0, &a1, wait);
 494
 495         return err;
 496 }
 497
 498 int vnic_dev_disable(struct vnic_dev *vdev)
 499 {
 500         u64 a0 = 0, a1 = 0;
 501         int wait = 1000;
 502         return vnic_dev_cmd(vdev, CMD_DISABLE, &a0, &a1, wait);
 503 }
 504
 505 int vnic_dev_open(struct vnic_dev *vdev, int arg)
 506 {
 507         u64 a0 = (u32)arg, a1 = 0;
 508         int wait = 1000;
 509         return vnic_dev_cmd(vdev, CMD_OPEN, &a0, &a1, wait);
 510 }
 511
 512 int vnic_dev_open_done(struct vnic_dev *vdev, int *done)
 513 {
 514         u64 a0 = 0, a1 = 0;
 515         int wait = 1000;
 516         int err;
 517
 518         *done = 0;
 519
 520         err = vnic_dev_cmd(vdev, CMD_OPEN_STATUS, &a0, &a1, wait);
 521         if (err)
 522                 return err;
 523
 524         *done = (a0 == 0);
 525
 526         return 0;
 527 }
 528
 529 static int vnic_dev_soft_reset(struct vnic_dev *vdev, int arg)
 530 {
 531         u64 a0 = (u32)arg, a1 = 0;
 532         int wait = 1000;
 533         return vnic_dev_cmd(vdev, CMD_SOFT_RESET, &a0, &a1, wait);
 534 }
 535
 536 static int vnic_dev_soft_reset_done(struct vnic_dev *vdev, int *done)
 537 {
 538         u64 a0 = 0, a1 = 0;
 539         int wait = 1000;
 540         int err;
 541
 542         *done = 0;
 543
 544         err = vnic_dev_cmd(vdev, CMD_SOFT_RESET_STATUS, &a0, &a1, wait);
 545         if (err)
 546                 return err;
 547
 548         *done = (a0 == 0);
 549
 550         return 0;
 551 }
 552
 553 int vnic_dev_hang_reset(struct vnic_dev *vdev, int arg)
 554 {
 555         u64 a0 = (u32)arg, a1 = 0;
 556         int wait = 1000;
 557         int err;
 558
 559         err = vnic_dev_cmd(vdev, CMD_HANG_RESET, &a0, &a1, wait);
 560         if (err == ERR_ECMDUNKNOWN) {
 561                 err = vnic_dev_soft_reset(vdev, arg);
 562                 if (err)
 563                         return err;
 564
 565                 return vnic_dev_init(vdev, 0);
 566         }
 567
 568         return err;
 569 }
 570
 571 int vnic_dev_hang_reset_done(struct vnic_dev *vdev, int *done)
 572 {
 573         u64 a0 = 0, a1 = 0;
 574         int wait = 1000;
 575         int err;
 576
 577         *done = 0;
 578
 579         err = vnic_dev_cmd(vdev, CMD_HANG_RESET_STATUS, &a0, &a1, wait);
 580         if (err) {
 581                 if (err == ERR_ECMDUNKNOWN)
 582                         return vnic_dev_soft_reset_done(vdev, done);
 583                 return err;
 584         }
 585
 586         *done = (a0 == 0);
 587
 588         return 0;
 589 }
 590
 591 int vnic_dev_hang_notify(struct vnic_dev *vdev)
 592 {
 593         u64 a0, a1;
 594         int wait = 1000;
 595         return vnic_dev_cmd(vdev, CMD_HANG_NOTIFY, &a0, &a1, wait);
 596 }
 597
 598 int vnic_dev_mac_addr(struct vnic_dev *vdev, u8 *mac_addr)
 599 {
 600         u64 a0, a1;
 601         int wait = 1000;
 602         int err, i;
 603
 604         for (i = 0; i < ETH_ALEN; i++)
 605                 mac_addr[i] = 0;
 606
 607         err = vnic_dev_cmd(vdev, CMD_MAC_ADDR, &a0, &a1, wait);
 608         if (err)
 609                 return err;
 610
 611         for (i = 0; i < ETH_ALEN; i++)
 612                 mac_addr[i] = ((u8 *)&a0)[i];
 613
 614         return 0;
 615 }
 616
 617 int vnic_dev_packet_filter(struct vnic_dev *vdev, int directed, int multicast,
 618         int broadcast, int promisc, int allmulti)
 619 {
 620         u64 a0, a1 = 0;
 621         int wait = 1000;
 622         int err;
 623
 624         a0 = (directed ? CMD_PFILTER_DIRECTED : 0) |
 625              (multicast ? CMD_PFILTER_MULTICAST : 0) |
 626              (broadcast ? CMD_PFILTER_BROADCAST : 0) |
 627              (promisc ? CMD_PFILTER_PROMISCUOUS : 0) |
 628              (allmulti ? CMD_PFILTER_ALL_MULTICAST : 0);
 629
 630         err = vnic_dev_cmd(vdev, CMD_PACKET_FILTER, &a0, &a1, wait);
 631         if (err)
 632                 pr_err("Can't set packet filter\n");
 633
 634         return err;
 635 }
 636
 637 int vnic_dev_add_addr(struct vnic_dev *vdev, u8 *addr)
 638 {
 639         u64 a0 = 0, a1 = 0;
 640         int wait = 1000;
 641         int err;
 642         int i;
 643
 644         for (i = 0; i < ETH_ALEN; i++)
 645                 ((u8 *)&a0)[i] = addr[i];
 646
 647         err = vnic_dev_cmd(vdev, CMD_ADDR_ADD, &a0, &a1, wait);
 648         if (err)
 649                 pr_err("Can't add addr [%pM], %d\n", addr, err);
 650
 651         return err;
 652 }
 653
 654 int vnic_dev_del_addr(struct vnic_dev *vdev, u8 *addr)
 655 {
 656         u64 a0 = 0, a1 = 0;
 657         int wait = 1000;
 658         int err;
 659         int i;
 660
 661         for (i = 0; i < ETH_ALEN; i++)
 662                 ((u8 *)&a0)[i] = addr[i];
 663
 664         err = vnic_dev_cmd(vdev, CMD_ADDR_DEL, &a0, &a1, wait);
 665         if (err)
 666                 pr_err("Can't del addr [%pM], %d\n", addr, err);
 667
 668         return err;
 669 }
 670
 671 int vnic_dev_set_ig_vlan_rewrite_mode(struct vnic_dev *vdev,
 672         u8 ig_vlan_rewrite_mode)
 673 {
 674         u64 a0 = ig_vlan_rewrite_mode, a1 = 0;
 675         int wait = 1000;
 676         int err;
 677
 678         err = vnic_dev_cmd(vdev, CMD_IG_VLAN_REWRITE_MODE, &a0, &a1, wait);
 679         if (err == ERR_ECMDUNKNOWN)
 680                 return 0;
 681
 682         return err;
 683 }
 684
 685 static int vnic_dev_notify_setcmd(struct vnic_dev *vdev,
 686         void *notify_addr, dma_addr_t notify_pa, u16 intr)
 687 {
 688         u64 a0, a1;
 689         int wait = 1000;
 690         int r;
 691
 692         memset(notify_addr, 0, sizeof(struct vnic_devcmd_notify));
 693         vdev->notify = notify_addr;
 694         vdev->notify_pa = notify_pa;
 695
 696         a0 = (u64)notify_pa;
 697         a1 = ((u64)intr << 32) & 0x0000ffff00000000ULL;
 698         a1 += sizeof(struct vnic_devcmd_notify);
 699
 700         r = vnic_dev_cmd(vdev, CMD_NOTIFY, &a0, &a1, wait);
 701         vdev->notify_sz = (r == 0) ? (u32)a1 : 0;
 702         return r;
 703 }
 704
 705 int vnic_dev_notify_set(struct vnic_dev *vdev, u16 intr)
 706 {
 707         void *notify_addr;
 708         dma_addr_t notify_pa;
 709
 710         if (vdev->notify || vdev->notify_pa) {
 711                 pr_err("notify block %p still allocated", vdev->notify);
 712                 return -EINVAL;
 713         }
 714
 715         notify_addr = pci_alloc_consistent(vdev->pdev,
 716                         sizeof(struct vnic_devcmd_notify),
 717                         &notify_pa);
 718         if (!notify_addr)
 719                 return -ENOMEM;
 720
 721         return vnic_dev_notify_setcmd(vdev, notify_addr, notify_pa, intr);
 722 }
 723
 724 static int vnic_dev_notify_unsetcmd(struct vnic_dev *vdev)
 725 {
 726         u64 a0, a1;
 727         int wait = 1000;
 728         int err;
 729
 730         a0 = 0;  /* paddr = 0 to unset notify buffer */
 731         a1 = 0x0000ffff00000000ULL; /* intr num = -1 to unreg for intr */
 732         a1 += sizeof(struct vnic_devcmd_notify);
 733
 734         err = vnic_dev_cmd(vdev, CMD_NOTIFY, &a0, &a1, wait);
 735         vdev->notify = NULL;
 736         vdev->notify_pa = 0;
 737         vdev->notify_sz = 0;
 738
 739         return err;
 740 }
 741
 742 int vnic_dev_notify_unset(struct vnic_dev *vdev)
 743 {
 744         if (vdev->notify) {
 745                 pci_free_consistent(vdev->pdev,
 746                         sizeof(struct vnic_devcmd_notify),
 747                         vdev->notify,
 748                         vdev->notify_pa);
 749         }
 750
 751         return vnic_dev_notify_unsetcmd(vdev);
 752 }
 753
 754 static int vnic_dev_notify_ready(struct vnic_dev *vdev)
 755 {
 756         u32 *words;
 757         unsigned int nwords = vdev->notify_sz / 4;
 758         unsigned int i;
 759         u32 csum;
 760
 761         if (!vdev->notify || !vdev->notify_sz)
 762                 return 0;
 763
 764         do {
 765                 csum = 0;
 766                 memcpy(&vdev->notify_copy, vdev->notify, vdev->notify_sz);
 767                 words = (u32 *)&vdev->notify_copy;
 768                 for (i = 1; i < nwords; i++)
 769                         csum += words[i];
 770         } while (csum != words[0]);
 771
 772         return 1;
 773 }
 774
 775 int vnic_dev_init(struct vnic_dev *vdev, int arg)
 776 {
 777         u64 a0 = (u32)arg, a1 = 0;
 778         int wait = 1000;
 779         int r = 0;
 780
 781         if (vnic_dev_capable(vdev, CMD_INIT))
 782                 r = vnic_dev_cmd(vdev, CMD_INIT, &a0, &a1, wait);
 783         else {
 784                 vnic_dev_cmd(vdev, CMD_INIT_v1, &a0, &a1, wait);
 785                 if (a0 & CMD_INITF_DEFAULT_MAC) {
 786                         /* Emulate these for old CMD_INIT_v1 which
 787                          * didn't pass a0 so no CMD_INITF_*.
 788                          */
 789                         vnic_dev_cmd(vdev, CMD_MAC_ADDR, &a0, &a1, wait);
 790                         vnic_dev_cmd(vdev, CMD_ADDR_ADD, &a0, &a1, wait);
 791                 }
 792         }
 793         return r;
 794 }
 795
 796 int vnic_dev_deinit(struct vnic_dev *vdev)
 797 {
 798         u64 a0 = 0, a1 = 0;
 799         int wait = 1000;
 800
 801         return vnic_dev_cmd(vdev, CMD_DEINIT, &a0, &a1, wait);
 802 }
 803
 804 void vnic_dev_intr_coal_timer_info_default(struct vnic_dev *vdev)
 805 {
 806         /* Default: hardware intr coal timer is in units of 1.5 usecs */
 807         vdev->intr_coal_timer_info.mul = 2;
 808         vdev->intr_coal_timer_info.div = 3;
 809         vdev->intr_coal_timer_info.max_usec =
 810                 vnic_dev_intr_coal_timer_hw_to_usec(vdev, 0xffff);
 811 }
 812
 813 int vnic_dev_intr_coal_timer_info(struct vnic_dev *vdev)
 814 {
 815         int wait = 1000;
 816         int err;
 817
 818         memset(vdev->args, 0, sizeof(vdev->args));
 819
 820         err = _vnic_dev_cmd(vdev, CMD_INTR_COAL_CONVERT, wait);
 821
 822         /* Use defaults when firmware doesn't support the devcmd at all or
 823          * supports it for only specific hardware
 824          */
 825         if ((err == ERR_ECMDUNKNOWN) ||
 826                 (!err && !(vdev->args[0] && vdev->args[1] && vdev->args[2]))) {
 827                 pr_warning("Using default conversion factor for "
 828                         "interrupt coalesce timer\n");
 829                 vnic_dev_intr_coal_timer_info_default(vdev);
 830                 return 0;
 831         }
 832
 833         vdev->intr_coal_timer_info.mul = (u32) vdev->args[0];
 834         vdev->intr_coal_timer_info.div = (u32) vdev->args[1];
 835         vdev->intr_coal_timer_info.max_usec = (u32) vdev->args[2];
 836
 837         return err;
 838 }
 839
 840 int vnic_dev_link_status(struct vnic_dev *vdev)
 841 {
 842         if (!vnic_dev_notify_ready(vdev))
 843                 return 0;
 844
 845         return vdev->notify_copy.link_state;
 846 }
 847
 848 u32 vnic_dev_port_speed(struct vnic_dev *vdev)
 849 {
 850         if (!vnic_dev_notify_ready(vdev))
 851                 return 0;
 852
 853         return vdev->notify_copy.port_speed;
 854 }
 855
 856 u32 vnic_dev_msg_lvl(struct vnic_dev *vdev)
 857 {
 858         if (!vnic_dev_notify_ready(vdev))
 859                 return 0;
 860
 861         return vdev->notify_copy.msglvl;
 862 }
 863
 864 u32 vnic_dev_mtu(struct vnic_dev *vdev)
 865 {
 866         if (!vnic_dev_notify_ready(vdev))
 867                 return 0;
 868
 869         return vdev->notify_copy.mtu;
 870 }
 871
 872 void vnic_dev_set_intr_mode(struct vnic_dev *vdev,
 873         enum vnic_dev_intr_mode intr_mode)
 874 {
 875         vdev->intr_mode = intr_mode;
 876 }
 877
 878 enum vnic_dev_intr_mode vnic_dev_get_intr_mode(
 879         struct vnic_dev *vdev)
 880 {
 881         return vdev->intr_mode;
 882 }
 883
 884 u32 vnic_dev_intr_coal_timer_usec_to_hw(struct vnic_dev *vdev, u32 usec)
 885 {
 886         return (usec * vdev->intr_coal_timer_info.mul) /
 887                 vdev->intr_coal_timer_info.div;
 888 }
 889
 890 u32 vnic_dev_intr_coal_timer_hw_to_usec(struct vnic_dev *vdev, u32 hw_cycles)
 891 {
 892         return (hw_cycles * vdev->intr_coal_timer_info.div) /
 893                 vdev->intr_coal_timer_info.mul;
 894 }
 895
 896 u32 vnic_dev_get_intr_coal_timer_max(struct vnic_dev *vdev)
 897 {
 898         return vdev->intr_coal_timer_info.max_usec;
 899 }
 900
 901 void vnic_dev_unregister(struct vnic_dev *vdev)
 902 {
 903         if (vdev) {
 904                 if (vdev->notify)
 905                         pci_free_consistent(vdev->pdev,
 906                                 sizeof(struct vnic_devcmd_notify),
 907                                 vdev->notify,
 908                                 vdev->notify_pa);
 909                 if (vdev->stats)
 910                         pci_free_consistent(vdev->pdev,
 911                                 sizeof(struct vnic_stats),
 912                                 vdev->stats, vdev->stats_pa);
 913                 if (vdev->fw_info)
 914                         pci_free_consistent(vdev->pdev,
 915                                 sizeof(struct vnic_devcmd_fw_info),
 916                                 vdev->fw_info, vdev->fw_info_pa);
 917                 kfree(vdev);
 918         }
 919 }
 920
 921 struct vnic_dev *vnic_dev_register(struct vnic_dev *vdev,
 922         void *priv, struct pci_dev *pdev, struct vnic_dev_bar *bar,
 923         unsigned int num_bars)
 924 {
 925         if (!vdev) {
 926                 vdev = kzalloc(sizeof(struct vnic_dev), GFP_ATOMIC);
 927                 if (!vdev)
 928                         return NULL;
 929         }
 930
 931         vdev->priv = priv;
 932         vdev->pdev = pdev;
 933
 934         if (vnic_dev_discover_res(vdev, bar, num_bars))
 935                 goto err_out;
 936
 937         vdev->devcmd = vnic_dev_get_res(vdev, RES_TYPE_DEVCMD, 0);
 938         if (!vdev->devcmd)
 939                 goto err_out;
 940
 941         return vdev;
 942
 943 err_out:
 944         vnic_dev_unregister(vdev);
 945         return NULL;
 946 }
 947
 948 int vnic_dev_init_prov2(struct vnic_dev *vdev, u8 *buf, u32 len)
 949 {
 950         u64 a0, a1 = len;
 951         int wait = 1000;
 952         dma_addr_t prov_pa;
 953         void *prov_buf;
 954         int ret;
 955
 956         prov_buf = pci_alloc_consistent(vdev->pdev, len, &prov_pa);
 957         if (!prov_buf)
 958                 return -ENOMEM;
 959
 960         memcpy(prov_buf, buf, len);
 961
 962         a0 = prov_pa;
 963
 964         ret = vnic_dev_cmd(vdev, CMD_INIT_PROV_INFO2, &a0, &a1, wait);
 965
 966         pci_free_consistent(vdev->pdev, len, prov_buf, prov_pa);
 967
 968         return ret;
 969 }
 970
 971 int vnic_dev_enable2(struct vnic_dev *vdev, int active)
 972 {
 973         u64 a0, a1 = 0;
 974         int wait = 1000;
 975
 976         a0 = (active ? CMD_ENABLE2_ACTIVE : 0);
 977
 978         return vnic_dev_cmd(vdev, CMD_ENABLE2, &a0, &a1, wait);
 979 }
 980
 981 static int vnic_dev_cmd_status(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd,
 982         int *status)
 983 {
 984         u64 a0 = cmd, a1 = 0;
 985         int wait = 1000;
 986         int ret;
 987
 988         ret = vnic_dev_cmd(vdev, CMD_STATUS, &a0, &a1, wait);
 989         if (!ret)
 990                 *status = (int)a0;
 991
 992         return ret;
 993 }
 994
 995 int vnic_dev_enable2_done(struct vnic_dev *vdev, int *status)
 996 {
 997         return vnic_dev_cmd_status(vdev, CMD_ENABLE2, status);
 998 }
 999
1000 int vnic_dev_deinit_done(struct vnic_dev *vdev, int *status)
1001 {
1002         return vnic_dev_cmd_status(vdev, CMD_DEINIT, status);
1003 }