drivers/net/enic/vnic_dev.c

   1 /*
   2  * Copyright 2008 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 #include <linux/slab.h>
  27
  28 #include "vnic_resource.h"
  29 #include "vnic_devcmd.h"
  30 #include "vnic_dev.h"
  31 #include "vnic_stats.h"
  32
  33 struct vnic_res {
  34         void __iomem *vaddr;
  35         dma_addr_t bus_addr;
  36         unsigned int count;
  37 };
  38
  39 #define VNIC_DEV_CAP_INIT       0x0001
  40
  41 struct vnic_dev {
  42         void *priv;
  43         struct pci_dev *pdev;
  44         struct vnic_res res[RES_TYPE_MAX];
  45         enum vnic_dev_intr_mode intr_mode;
  46         struct vnic_devcmd __iomem *devcmd;
  47         struct vnic_devcmd_notify *notify;
  48         struct vnic_devcmd_notify notify_copy;
  49         dma_addr_t notify_pa;
  50         u32 notify_sz;
  51         u32 *linkstatus;
  52         dma_addr_t linkstatus_pa;
  53         struct vnic_stats *stats;
  54         dma_addr_t stats_pa;
  55         struct vnic_devcmd_fw_info *fw_info;
  56         dma_addr_t fw_info_pa;
  57         u32 cap_flags;
  58 };
  59
  60 #define VNIC_MAX_RES_HDR_SIZE \
  61         (sizeof(struct vnic_resource_header) + \
  62         sizeof(struct vnic_resource) * RES_TYPE_MAX)
  63 #define VNIC_RES_STRIDE 128
  64
  65 void *vnic_dev_priv(struct vnic_dev *vdev)
  66 {
  67         return vdev->priv;
  68 }
  69
  70 static int vnic_dev_discover_res(struct vnic_dev *vdev,
  71         struct vnic_dev_bar *bar, unsigned int num_bars)
  72 {
  73         struct vnic_resource_header __iomem *rh;
  74         struct vnic_resource __iomem *r;
  75         u8 type;
  76
  77         if (num_bars == 0)
  78                 return -EINVAL;
  79
  80         if (bar->len < VNIC_MAX_RES_HDR_SIZE) {
  81                 printk(KERN_ERR "vNIC BAR0 res hdr length error\n");
  82                 return -EINVAL;
  83         }
  84
  85         rh = bar->vaddr;
  86         if (!rh) {
  87                 printk(KERN_ERR "vNIC BAR0 res hdr not mem-mapped\n");
  88                 return -EINVAL;
  89         }
  90
  91         if (ioread32(&rh->magic) != VNIC_RES_MAGIC ||
  92             ioread32(&rh->version) != VNIC_RES_VERSION) {
  93                 printk(KERN_ERR "vNIC BAR0 res magic/version error "
  94                         "exp (%lx/%lx) curr (%x/%x)\n",
  95                         VNIC_RES_MAGIC, VNIC_RES_VERSION,
  96                         ioread32(&rh->magic), ioread32(&rh->version));
  97                 return -EINVAL;
  98         }
  99
 100         r = (struct vnic_resource __iomem *)(rh + 1);
 101
 102         while ((type = ioread8(&r->type)) != RES_TYPE_EOL) {
 103
 104                 u8 bar_num = ioread8(&r->bar);
 105                 u32 bar_offset = ioread32(&r->bar_offset);
 106                 u32 count = ioread32(&r->count);
 107                 u32 len;
 108
 109                 r++;
 110
 111                 if (bar_num >= num_bars)
 112                         continue;
 113
 114                 if (!bar[bar_num].len || !bar[bar_num].vaddr)
 115                         continue;
 116
 117                 switch (type) {
 118                 case RES_TYPE_WQ:
 119                 case RES_TYPE_RQ:
 120                 case RES_TYPE_CQ:
 121                 case RES_TYPE_INTR_CTRL:
 122                         /* each count is stride bytes long */
 123                         len = count * VNIC_RES_STRIDE;
 124                         if (len + bar_offset > bar[bar_num].len) {
 125                                 printk(KERN_ERR "vNIC BAR0 resource %d "
 126                                         "out-of-bounds, offset 0x%x + "
 127                                         "size 0x%x > bar len 0x%lx\n",
 128                                         type, bar_offset,
 129                                         len,
 130                                         bar[bar_num].len);
 131                                 return -EINVAL;
 132                         }
 133                         break;
 134                 case RES_TYPE_INTR_PBA_LEGACY:
 135                 case RES_TYPE_DEVCMD:
 136                         len = count;
 137                         break;
 138                 default:
 139                         continue;
 140                 }
 141
 142                 vdev->res[type].count = count;
 143                 vdev->res[type].vaddr = (char __iomem *)bar[bar_num].vaddr +
 144                         bar_offset;
 145                 vdev->res[type].bus_addr = bar[bar_num].bus_addr + bar_offset;
 146         }
 147
 148         return 0;
 149 }
 150
 151 unsigned int vnic_dev_get_res_count(struct vnic_dev *vdev,
 152         enum vnic_res_type type)
 153 {
 154         return vdev->res[type].count;
 155 }
 156
 157 void __iomem *vnic_dev_get_res(struct vnic_dev *vdev, enum vnic_res_type type,
 158         unsigned int index)
 159 {
 160         if (!vdev->res[type].vaddr)
 161                 return NULL;
 162
 163         switch (type) {
 164         case RES_TYPE_WQ:
 165         case RES_TYPE_RQ:
 166         case RES_TYPE_CQ:
 167         case RES_TYPE_INTR_CTRL:
 168                 return (char __iomem *)vdev->res[type].vaddr +
 169                         index * VNIC_RES_STRIDE;
 170         default:
 171                 return (char __iomem *)vdev->res[type].vaddr;
 172         }
 173 }
 174
 175 dma_addr_t vnic_dev_get_res_bus_addr(struct vnic_dev *vdev,
 176         enum vnic_res_type type, unsigned int index)
 177 {
 178         switch (type) {
 179         case RES_TYPE_WQ:
 180         case RES_TYPE_RQ:
 181         case RES_TYPE_CQ:
 182         case RES_TYPE_INTR_CTRL:
 183                 return vdev->res[type].bus_addr +
 184                         index * VNIC_RES_STRIDE;
 185         default:
 186                 return vdev->res[type].bus_addr;
 187         }
 188 }
 189
 190 unsigned int vnic_dev_desc_ring_size(struct vnic_dev_ring *ring,
 191         unsigned int desc_count, unsigned int desc_size)
 192 {
 193         /* The base address of the desc rings must be 512 byte aligned.
 194          * Descriptor count is aligned to groups of 32 descriptors.  A
 195          * count of 0 means the maximum 4096 descriptors.  Descriptor
 196          * size is aligned to 16 bytes.
 197          */
 198
 199         unsigned int count_align = 32;
 200         unsigned int desc_align = 16;
 201
 202         ring->base_align = 512;
 203
 204         if (desc_count == 0)
 205                 desc_count = 4096;
 206
 207         ring->desc_count = ALIGN(desc_count, count_align);
 208
 209         ring->desc_size = ALIGN(desc_size, desc_align);
 210
 211         ring->size = ring->desc_count * ring->desc_size;
 212         ring->size_unaligned = ring->size + ring->base_align;
 213
 214         return ring->size_unaligned;
 215 }
 216
 217 void vnic_dev_clear_desc_ring(struct vnic_dev_ring *ring)
 218 {
 219         memset(ring->descs, 0, ring->size);
 220 }
 221
 222 int vnic_dev_alloc_desc_ring(struct vnic_dev *vdev, struct vnic_dev_ring *ring,
 223         unsigned int desc_count, unsigned int desc_size)
 224 {
 225         vnic_dev_desc_ring_size(ring, desc_count, desc_size);
 226
 227         ring->descs_unaligned = pci_alloc_consistent(vdev->pdev,
 228                 ring->size_unaligned,
 229                 &ring->base_addr_unaligned);
 230
 231         if (!ring->descs_unaligned) {
 232                 printk(KERN_ERR
 233                   "Failed to allocate ring (size=%d), aborting\n",
 234                         (int)ring->size);
 235                 return -ENOMEM;
 236         }
 237
 238         ring->base_addr = ALIGN(ring->base_addr_unaligned,
 239                 ring->base_align);
 240         ring->descs = (u8 *)ring->descs_unaligned +
 241                 (ring->base_addr - ring->base_addr_unaligned);
 242
 243         vnic_dev_clear_desc_ring(ring);
 244
 245         ring->desc_avail = ring->desc_count - 1;
 246
 247         return 0;
 248 }
 249
 250 void vnic_dev_free_desc_ring(struct vnic_dev *vdev, struct vnic_dev_ring *ring)
 251 {
 252         if (ring->descs) {
 253                 pci_free_consistent(vdev->pdev,
 254                         ring->size_unaligned,
 255                         ring->descs_unaligned,
 256                         ring->base_addr_unaligned);
 257                 ring->descs = NULL;
 258         }
 259 }
 260
 261 int vnic_dev_cmd(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd,
 262         u64 *a0, u64 *a1, int wait)
 263 {
 264         struct vnic_devcmd __iomem *devcmd = vdev->devcmd;
 265         int delay;
 266         u32 status;
 267         int err;
 268
 269         status = ioread32(&devcmd->status);
 270         if (status & STAT_BUSY) {
 271                 printk(KERN_ERR "Busy devcmd %d\n", _CMD_N(cmd));
 272                 return -EBUSY;
 273         }
 274
 275         if (_CMD_DIR(cmd) & _CMD_DIR_WRITE) {
 276                 writeq(*a0, &devcmd->args[0]);
 277                 writeq(*a1, &devcmd->args[1]);
 278                 wmb();
 279         }
 280
 281         iowrite32(cmd, &devcmd->cmd);
 282
 283         if ((_CMD_FLAGS(cmd) & _CMD_FLAGS_NOWAIT))
 284                 return 0;
 285
 286         for (delay = 0; delay < wait; delay++) {
 287
 288                 udelay(100);
 289
 290                 status = ioread32(&devcmd->status);
 291                 if (!(status & STAT_BUSY)) {
 292
 293                         if (status & STAT_ERROR) {
 294                                 err = (int)readq(&devcmd->args[0]);
 295                                 if (err != ERR_ECMDUNKNOWN ||
 296                                     cmd != CMD_CAPABILITY)
 297                                         printk(KERN_ERR "Error %d devcmd %d\n",
 298                                                 err, _CMD_N(cmd));
 299                                 return err;
 300                         }
 301
 302                         if (_CMD_DIR(cmd) & _CMD_DIR_READ) {
 303                                 rmb();
 304                                 *a0 = readq(&devcmd->args[0]);
 305                                 *a1 = readq(&devcmd->args[1]);
 306                         }
 307
 308                         return 0;
 309                 }
 310         }
 311
 312         printk(KERN_ERR "Timedout devcmd %d\n", _CMD_N(cmd));
 313         return -ETIMEDOUT;
 314 }
 315
 316 static int vnic_dev_capable(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd)
 317 {
 318         u64 a0 = (u32)cmd, a1 = 0;
 319         int wait = 1000;
 320         int err;
 321
 322         err = vnic_dev_cmd(vdev, CMD_CAPABILITY, &a0, &a1, wait);
 323
 324         return !(err || a0);
 325 }
 326
 327 int vnic_dev_fw_info(struct vnic_dev *vdev,
 328         struct vnic_devcmd_fw_info **fw_info)
 329 {
 330         u64 a0, a1 = 0;
 331         int wait = 1000;
 332         int err = 0;
 333
 334         if (!vdev->fw_info) {
 335                 vdev->fw_info = pci_alloc_consistent(vdev->pdev,
 336                         sizeof(struct vnic_devcmd_fw_info),
 337                         &vdev->fw_info_pa);
 338                 if (!vdev->fw_info)
 339                         return -ENOMEM;
 340
 341                 a0 = vdev->fw_info_pa;
 342
 343                 /* only get fw_info once and cache it */
 344                 err = vnic_dev_cmd(vdev, CMD_MCPU_FW_INFO, &a0, &a1, wait);
 345         }
 346
 347         *fw_info = vdev->fw_info;
 348
 349         return err;
 350 }
 351
 352 int vnic_dev_hw_version(struct vnic_dev *vdev, enum vnic_dev_hw_version *hw_ver)
 353 {
 354         struct vnic_devcmd_fw_info *fw_info;
 355         int err;
 356
 357         err = vnic_dev_fw_info(vdev, &fw_info);
 358         if (err)
 359                 return err;
 360
 361         if (strncmp(fw_info->hw_version, "A1", sizeof("A1")) == 0)
 362                 *hw_ver = VNIC_DEV_HW_VER_A1;
 363         else if (strncmp(fw_info->hw_version, "A2", sizeof("A2")) == 0)
 364                 *hw_ver = VNIC_DEV_HW_VER_A2;
 365         else
 366                 *hw_ver = VNIC_DEV_HW_VER_UNKNOWN;
 367
 368         return 0;
 369 }
 370
 371 int vnic_dev_spec(struct vnic_dev *vdev, unsigned int offset, unsigned int size,
 372         void *value)
 373 {
 374         u64 a0, a1;
 375         int wait = 1000;
 376         int err;
 377
 378         a0 = offset;
 379         a1 = size;
 380
 381         err = vnic_dev_cmd(vdev, CMD_DEV_SPEC, &a0, &a1, wait);
 382
 383         switch (size) {
 384         case 1: *(u8 *)value = (u8)a0; break;
 385         case 2: *(u16 *)value = (u16)a0; break;
 386         case 4: *(u32 *)value = (u32)a0; break;
 387         case 8: *(u64 *)value = a0; break;
 388         default: BUG(); break;
 389         }
 390
 391         return err;
 392 }
 393
 394 int vnic_dev_stats_clear(struct vnic_dev *vdev)
 395 {
 396         u64 a0 = 0, a1 = 0;
 397         int wait = 1000;
 398         return vnic_dev_cmd(vdev, CMD_STATS_CLEAR, &a0, &a1, wait);
 399 }
 400
 401 int vnic_dev_stats_dump(struct vnic_dev *vdev, struct vnic_stats **stats)
 402 {
 403         u64 a0, a1;
 404         int wait = 1000;
 405
 406         if (!vdev->stats) {
 407                 vdev->stats = pci_alloc_consistent(vdev->pdev,
 408                         sizeof(struct vnic_stats), &vdev->stats_pa);
 409                 if (!vdev->stats)
 410                         return -ENOMEM;
 411         }
 412
 413         *stats = vdev->stats;
 414         a0 = vdev->stats_pa;
 415         a1 = sizeof(struct vnic_stats);
 416
 417         return vnic_dev_cmd(vdev, CMD_STATS_DUMP, &a0, &a1, wait);
 418 }
 419
 420 int vnic_dev_close(struct vnic_dev *vdev)
 421 {
 422         u64 a0 = 0, a1 = 0;
 423         int wait = 1000;
 424         return vnic_dev_cmd(vdev, CMD_CLOSE, &a0, &a1, wait);
 425 }
 426
 427 int vnic_dev_enable(struct vnic_dev *vdev)
 428 {
 429         u64 a0 = 0, a1 = 0;
 430         int wait = 1000;
 431         return vnic_dev_cmd(vdev, CMD_ENABLE, &a0, &a1, wait);
 432 }
 433
 434 int vnic_dev_disable(struct vnic_dev *vdev)
 435 {
 436         u64 a0 = 0, a1 = 0;
 437         int wait = 1000;
 438         return vnic_dev_cmd(vdev, CMD_DISABLE, &a0, &a1, wait);
 439 }
 440
 441 int vnic_dev_open(struct vnic_dev *vdev, int arg)
 442 {
 443         u64 a0 = (u32)arg, a1 = 0;
 444         int wait = 1000;
 445         return vnic_dev_cmd(vdev, CMD_OPEN, &a0, &a1, wait);
 446 }
 447
 448 int vnic_dev_open_done(struct vnic_dev *vdev, int *done)
 449 {
 450         u64 a0 = 0, a1 = 0;
 451         int wait = 1000;
 452         int err;
 453
 454         *done = 0;
 455
 456         err = vnic_dev_cmd(vdev, CMD_OPEN_STATUS, &a0, &a1, wait);
 457         if (err)
 458                 return err;
 459
 460         *done = (a0 == 0);
 461
 462         return 0;
 463 }
 464
 465 int vnic_dev_soft_reset(struct vnic_dev *vdev, int arg)
 466 {
 467         u64 a0 = (u32)arg, a1 = 0;
 468         int wait = 1000;
 469         return vnic_dev_cmd(vdev, CMD_SOFT_RESET, &a0, &a1, wait);
 470 }
 471
 472 int vnic_dev_soft_reset_done(struct vnic_dev *vdev, int *done)
 473 {
 474         u64 a0 = 0, a1 = 0;
 475         int wait = 1000;
 476         int err;
 477
 478         *done = 0;
 479
 480         err = vnic_dev_cmd(vdev, CMD_SOFT_RESET_STATUS, &a0, &a1, wait);
 481         if (err)
 482                 return err;
 483
 484         *done = (a0 == 0);
 485
 486         return 0;
 487 }
 488
 489 int vnic_dev_hang_notify(struct vnic_dev *vdev)
 490 {
 491         u64 a0, a1;
 492         int wait = 1000;
 493         return vnic_dev_cmd(vdev, CMD_HANG_NOTIFY, &a0, &a1, wait);
 494 }
 495
 496 int vnic_dev_mac_addr(struct vnic_dev *vdev, u8 *mac_addr)
 497 {
 498         u64 a0, a1;
 499         int wait = 1000;
 500         int err, i;
 501
 502         for (i = 0; i < ETH_ALEN; i++)
 503                 mac_addr[i] = 0;
 504
 505         err = vnic_dev_cmd(vdev, CMD_MAC_ADDR, &a0, &a1, wait);
 506         if (err)
 507                 return err;
 508
 509         for (i = 0; i < ETH_ALEN; i++)
 510                 mac_addr[i] = ((u8 *)&a0)[i];
 511
 512         return 0;
 513 }
 514
 515 void vnic_dev_packet_filter(struct vnic_dev *vdev, int directed, int multicast,
 516         int broadcast, int promisc, int allmulti)
 517 {
 518         u64 a0, a1 = 0;
 519         int wait = 1000;
 520         int err;
 521
 522         a0 = (directed ? CMD_PFILTER_DIRECTED : 0) |
 523              (multicast ? CMD_PFILTER_MULTICAST : 0) |
 524              (broadcast ? CMD_PFILTER_BROADCAST : 0) |
 525              (promisc ? CMD_PFILTER_PROMISCUOUS : 0) |
 526              (allmulti ? CMD_PFILTER_ALL_MULTICAST : 0);
 527
 528         err = vnic_dev_cmd(vdev, CMD_PACKET_FILTER, &a0, &a1, wait);
 529         if (err)
 530                 printk(KERN_ERR "Can't set packet filter\n");
 531 }
 532
 533 int vnic_dev_add_addr(struct vnic_dev *vdev, u8 *addr)
 534 {
 535         u64 a0 = 0, a1 = 0;
 536         int wait = 1000;
 537         int err;
 538         int i;
 539
 540         for (i = 0; i < ETH_ALEN; i++)
 541                 ((u8 *)&a0)[i] = addr[i];
 542
 543         err = vnic_dev_cmd(vdev, CMD_ADDR_ADD, &a0, &a1, wait);
 544         if (err)
 545                 printk(KERN_ERR "Can't add addr [%pM], %d\n", addr, err);
 546
 547         return err;
 548 }
 549
 550 int vnic_dev_del_addr(struct vnic_dev *vdev, u8 *addr)
 551 {
 552         u64 a0 = 0, a1 = 0;
 553         int wait = 1000;
 554         int err;
 555         int i;
 556
 557         for (i = 0; i < ETH_ALEN; i++)
 558                 ((u8 *)&a0)[i] = addr[i];
 559
 560         err = vnic_dev_cmd(vdev, CMD_ADDR_DEL, &a0, &a1, wait);
 561         if (err)
 562                 printk(KERN_ERR "Can't del addr [%pM], %d\n", addr, err);
 563
 564         return err;
 565 }
 566
 567 int vnic_dev_raise_intr(struct vnic_dev *vdev, u16 intr)
 568 {
 569         u64 a0 = intr, a1 = 0;
 570         int wait = 1000;
 571         int err;
 572
 573         err = vnic_dev_cmd(vdev, CMD_IAR, &a0, &a1, wait);
 574         if (err)
 575                 printk(KERN_ERR "Failed to raise INTR[%d], err %d\n",
 576                         intr, err);
 577
 578         return err;
 579 }
 580
 581 int vnic_dev_notify_setcmd(struct vnic_dev *vdev,
 582         void *notify_addr, dma_addr_t notify_pa, u16 intr)
 583 {
 584         u64 a0, a1;
 585         int wait = 1000;
 586         int r;
 587
 588         memset(notify_addr, 0, sizeof(struct vnic_devcmd_notify));
 589         vdev->notify = notify_addr;
 590         vdev->notify_pa = notify_pa;
 591
 592         a0 = (u64)notify_pa;
 593         a1 = ((u64)intr << 32) & 0x0000ffff00000000ULL;
 594         a1 += sizeof(struct vnic_devcmd_notify);
 595
 596         r = vnic_dev_cmd(vdev, CMD_NOTIFY, &a0, &a1, wait);
 597         vdev->notify_sz = (r == 0) ? (u32)a1 : 0;
 598         return r;
 599 }
 600
 601 int vnic_dev_notify_set(struct vnic_dev *vdev, u16 intr)
 602 {
 603         void *notify_addr;
 604         dma_addr_t notify_pa;
 605
 606         if (vdev->notify || vdev->notify_pa) {
 607                 printk(KERN_ERR "notify block %p still allocated",
 608                         vdev->notify);
 609                 return -EINVAL;
 610         }
 611
 612         notify_addr = pci_alloc_consistent(vdev->pdev,
 613                         sizeof(struct vnic_devcmd_notify),
 614                         &notify_pa);
 615         if (!notify_addr)
 616                 return -ENOMEM;
 617
 618         return vnic_dev_notify_setcmd(vdev, notify_addr, notify_pa, intr);
 619 }
 620
 621 void vnic_dev_notify_unsetcmd(struct vnic_dev *vdev)
 622 {
 623         u64 a0, a1;
 624         int wait = 1000;
 625
 626         a0 = 0;  /* paddr = 0 to unset notify buffer */
 627         a1 = 0x0000ffff00000000ULL; /* intr num = -1 to unreg for intr */
 628         a1 += sizeof(struct vnic_devcmd_notify);
 629
 630         vnic_dev_cmd(vdev, CMD_NOTIFY, &a0, &a1, wait);
 631         vdev->notify = NULL;
 632         vdev->notify_pa = 0;
 633         vdev->notify_sz = 0;
 634 }
 635
 636 void vnic_dev_notify_unset(struct vnic_dev *vdev)
 637 {
 638         if (vdev->notify) {
 639                 pci_free_consistent(vdev->pdev,
 640                         sizeof(struct vnic_devcmd_notify),
 641                         vdev->notify,
 642                         vdev->notify_pa);
 643         }
 644
 645         vnic_dev_notify_unsetcmd(vdev);
 646 }
 647
 648 static int vnic_dev_notify_ready(struct vnic_dev *vdev)
 649 {
 650         u32 *words;
 651         unsigned int nwords = vdev->notify_sz / 4;
 652         unsigned int i;
 653         u32 csum;
 654
 655         if (!vdev->notify || !vdev->notify_sz)
 656                 return 0;
 657
 658         do {
 659                 csum = 0;
 660                 memcpy(&vdev->notify_copy, vdev->notify, vdev->notify_sz);
 661                 words = (u32 *)&vdev->notify_copy;
 662                 for (i = 1; i < nwords; i++)
 663                         csum += words[i];
 664         } while (csum != words[0]);
 665
 666         return 1;
 667 }
 668
 669 int vnic_dev_init(struct vnic_dev *vdev, int arg)
 670 {
 671         u64 a0 = (u32)arg, a1 = 0;
 672         int wait = 1000;
 673         int r = 0;
 674
 675         if (vdev->cap_flags & VNIC_DEV_CAP_INIT)
 676                 r = vnic_dev_cmd(vdev, CMD_INIT, &a0, &a1, wait);
 677         else {
 678                 vnic_dev_cmd(vdev, CMD_INIT_v1, &a0, &a1, wait);
 679                 if (a0 & CMD_INITF_DEFAULT_MAC) {
 680                         // Emulate these for old CMD_INIT_v1 which
 681                         // didn't pass a0 so no CMD_INITF_*.
 682                         vnic_dev_cmd(vdev, CMD_MAC_ADDR, &a0, &a1, wait);
 683                         vnic_dev_cmd(vdev, CMD_ADDR_ADD, &a0, &a1, wait);
 684                 }
 685         }
 686         return r;
 687 }
 688
 689 int vnic_dev_init_done(struct vnic_dev *vdev, int *done, int *err)
 690 {
 691         u64 a0 = 0, a1 = 0;
 692         int wait = 1000;
 693         int ret;
 694
 695         *done = 0;
 696
 697         ret = vnic_dev_cmd(vdev, CMD_INIT_STATUS, &a0, &a1, wait);
 698         if (ret)
 699                 return ret;
 700
 701         *done = (a0 == 0);
 702
 703         *err = (a0 == 0) ? a1 : 0;
 704
 705         return 0;
 706 }
 707
 708 int vnic_dev_init_prov(struct vnic_dev *vdev, u8 *buf, u32 len)
 709 {
 710         u64 a0, a1 = len;
 711         int wait = 1000;
 712         dma_addr_t prov_pa;
 713         void *prov_buf;
 714         int ret;
 715
 716         prov_buf = pci_alloc_consistent(vdev->pdev, len, &prov_pa);
 717         if (!prov_buf)
 718                 return -ENOMEM;
 719
 720         memcpy(prov_buf, buf, len);
 721
 722         a0 = prov_pa;
 723
 724         ret = vnic_dev_cmd(vdev, CMD_INIT_PROV_INFO, &a0, &a1, wait);
 725
 726         pci_free_consistent(vdev->pdev, len, prov_buf, prov_pa);
 727
 728         return ret;
 729 }
 730
 731 int vnic_dev_deinit(struct vnic_dev *vdev)
 732 {
 733         u64 a0 = 0, a1 = 0;
 734         int wait = 1000;
 735
 736         return vnic_dev_cmd(vdev, CMD_DEINIT, &a0, &a1, wait);
 737 }
 738
 739 int vnic_dev_link_status(struct vnic_dev *vdev)
 740 {
 741         if (vdev->linkstatus)
 742                 return *vdev->linkstatus;
 743
 744         if (!vnic_dev_notify_ready(vdev))
 745                 return 0;
 746
 747         return vdev->notify_copy.link_state;
 748 }
 749
 750 u32 vnic_dev_port_speed(struct vnic_dev *vdev)
 751 {
 752         if (!vnic_dev_notify_ready(vdev))
 753                 return 0;
 754
 755         return vdev->notify_copy.port_speed;
 756 }
 757
 758 u32 vnic_dev_msg_lvl(struct vnic_dev *vdev)
 759 {
 760         if (!vnic_dev_notify_ready(vdev))
 761                 return 0;
 762
 763         return vdev->notify_copy.msglvl;
 764 }
 765
 766 u32 vnic_dev_mtu(struct vnic_dev *vdev)
 767 {
 768         if (!vnic_dev_notify_ready(vdev))
 769                 return 0;
 770
 771         return vdev->notify_copy.mtu;
 772 }
 773
 774 u32 vnic_dev_link_down_cnt(struct vnic_dev *vdev)
 775 {
 776         if (!vnic_dev_notify_ready(vdev))
 777                 return 0;
 778
 779         return vdev->notify_copy.link_down_cnt;
 780 }
 781
 782 u32 vnic_dev_notify_status(struct vnic_dev *vdev)
 783 {
 784         if (!vnic_dev_notify_ready(vdev))
 785                 return 0;
 786
 787         return vdev->notify_copy.status;
 788 }
 789
 790 void vnic_dev_set_intr_mode(struct vnic_dev *vdev,
 791         enum vnic_dev_intr_mode intr_mode)
 792 {
 793         vdev->intr_mode = intr_mode;
 794 }
 795
 796 enum vnic_dev_intr_mode vnic_dev_get_intr_mode(
 797         struct vnic_dev *vdev)
 798 {
 799         return vdev->intr_mode;
 800 }
 801
 802 void vnic_dev_unregister(struct vnic_dev *vdev)
 803 {
 804         if (vdev) {
 805                 if (vdev->notify)
 806                         pci_free_consistent(vdev->pdev,
 807                                 sizeof(struct vnic_devcmd_notify),
 808                                 vdev->notify,
 809                                 vdev->notify_pa);
 810                 if (vdev->linkstatus)
 811                         pci_free_consistent(vdev->pdev,
 812                                 sizeof(u32),
 813                                 vdev->linkstatus,
 814                                 vdev->linkstatus_pa);
 815                 if (vdev->stats)
 816                         pci_free_consistent(vdev->pdev,
 817                                 sizeof(struct vnic_dev),
 818                                 vdev->stats, vdev->stats_pa);
 819                 if (vdev->fw_info)
 820                         pci_free_consistent(vdev->pdev,
 821                                 sizeof(struct vnic_devcmd_fw_info),
 822                                 vdev->fw_info, vdev->fw_info_pa);
 823                 kfree(vdev);
 824         }
 825 }
 826
 827 struct vnic_dev *vnic_dev_register(struct vnic_dev *vdev,
 828         void *priv, struct pci_dev *pdev, struct vnic_dev_bar *bar,
 829         unsigned int num_bars)
 830 {
 831         if (!vdev) {
 832                 vdev = kzalloc(sizeof(struct vnic_dev), GFP_ATOMIC);
 833                 if (!vdev)
 834                         return NULL;
 835         }
 836
 837         vdev->priv = priv;
 838         vdev->pdev = pdev;
 839
 840         if (vnic_dev_discover_res(vdev, bar, num_bars))
 841                 goto err_out;
 842
 843         vdev->devcmd = vnic_dev_get_res(vdev, RES_TYPE_DEVCMD, 0);
 844         if (!vdev->devcmd)
 845                 goto err_out;
 846
 847         vdev->cap_flags = 0;
 848
 849         if (vnic_dev_capable(vdev, CMD_INIT))
 850                 vdev->cap_flags |= VNIC_DEV_CAP_INIT;
 851
 852         return vdev;
 853
 854 err_out:
 855         vnic_dev_unregister(vdev);
 856         return NULL;
 857 }
 858
 859