drivers/scsi/fnic/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 #include <linux/kernel.h>
  20 #include <linux/errno.h>
  21 #include <linux/types.h>
  22 #include <linux/pci.h>
  23 #include <linux/delay.h>
  24 #include <linux/if_ether.h>
  25 #include <linux/slab.h>
  26 #include "vnic_resource.h"
  27 #include "vnic_devcmd.h"
  28 #include "vnic_dev.h"
  29 #include "vnic_stats.h"
  30 #include "vnic_wq.h"
  31
  32 struct devcmd2_controller {
  33         struct vnic_wq_ctrl *wq_ctrl;
  34         struct vnic_dev_ring results_ring;
  35         struct vnic_wq wq;
  36         struct vnic_devcmd2 *cmd_ring;
  37         struct devcmd2_result *result;
  38         u16 next_result;
  39         u16 result_size;
  40         int color;
  41 };
  42
  43 enum vnic_proxy_type {
  44         PROXY_NONE,
  45         PROXY_BY_BDF,
  46         PROXY_BY_INDEX,
  47 };
  48
  49 struct vnic_res {
  50         void __iomem *vaddr;
  51         unsigned int count;
  52 };
  53
  54 struct vnic_dev {
  55         void *priv;
  56         struct pci_dev *pdev;
  57         struct vnic_res res[RES_TYPE_MAX];
  58         enum vnic_dev_intr_mode intr_mode;
  59         struct vnic_devcmd __iomem *devcmd;
  60         struct vnic_devcmd_notify *notify;
  61         struct vnic_devcmd_notify notify_copy;
  62         dma_addr_t notify_pa;
  63         u32 *linkstatus;
  64         dma_addr_t linkstatus_pa;
  65         struct vnic_stats *stats;
  66         dma_addr_t stats_pa;
  67         struct vnic_devcmd_fw_info *fw_info;
  68         dma_addr_t fw_info_pa;
  69         enum vnic_proxy_type proxy;
  70         u32 proxy_index;
  71         u64 args[VNIC_DEVCMD_NARGS];
  72         struct devcmd2_controller *devcmd2;
  73         int (*devcmd_rtn)(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd,
  74                         int wait);
  75 };
  76
  77 #define VNIC_MAX_RES_HDR_SIZE \
  78         (sizeof(struct vnic_resource_header) + \
  79         sizeof(struct vnic_resource) * RES_TYPE_MAX)
  80 #define VNIC_RES_STRIDE 128
  81
  82 void *vnic_dev_priv(struct vnic_dev *vdev)
  83 {
  84         return vdev->priv;
  85 }
  86
  87 static int vnic_dev_discover_res(struct vnic_dev *vdev,
  88         struct vnic_dev_bar *bar)
  89 {
  90         struct vnic_resource_header __iomem *rh;
  91         struct vnic_resource __iomem *r;
  92         u8 type;
  93
  94         if (bar->len < VNIC_MAX_RES_HDR_SIZE) {
  95                 printk(KERN_ERR "vNIC BAR0 res hdr length error\n");
  96                 return -EINVAL;
  97         }
  98
  99         rh = bar->vaddr;
 100         if (!rh) {
 101                 printk(KERN_ERR "vNIC BAR0 res hdr not mem-mapped\n");
 102                 return -EINVAL;
 103         }
 104
 105         if (ioread32(&rh->magic) != VNIC_RES_MAGIC ||
 106             ioread32(&rh->version) != VNIC_RES_VERSION) {
 107                 printk(KERN_ERR "vNIC BAR0 res magic/version error "
 108                         "exp (%lx/%lx) curr (%x/%x)\n",
 109                         VNIC_RES_MAGIC, VNIC_RES_VERSION,
 110                         ioread32(&rh->magic), ioread32(&rh->version));
 111                 return -EINVAL;
 112         }
 113
 114         r = (struct vnic_resource __iomem *)(rh + 1);
 115
 116         while ((type = ioread8(&r->type)) != RES_TYPE_EOL) {
 117
 118                 u8 bar_num = ioread8(&r->bar);
 119                 u32 bar_offset = ioread32(&r->bar_offset);
 120                 u32 count = ioread32(&r->count);
 121                 u32 len;
 122
 123                 r++;
 124
 125                 if (bar_num != 0)  /* only mapping in BAR0 resources */
 126                         continue;
 127
 128                 switch (type) {
 129                 case RES_TYPE_WQ:
 130                 case RES_TYPE_RQ:
 131                 case RES_TYPE_CQ:
 132                 case RES_TYPE_INTR_CTRL:
 133                         /* each count is stride bytes long */
 134                         len = count * VNIC_RES_STRIDE;
 135                         if (len + bar_offset > bar->len) {
 136                                 printk(KERN_ERR "vNIC BAR0 resource %d "
 137                                         "out-of-bounds, offset 0x%x + "
 138                                         "size 0x%x > bar len 0x%lx\n",
 139                                         type, bar_offset,
 140                                         len,
 141                                         bar->len);
 142                                 return -EINVAL;
 143                         }
 144                         break;
 145                 case RES_TYPE_INTR_PBA_LEGACY:
 146                 case RES_TYPE_DEVCMD2:
 147                 case RES_TYPE_DEVCMD:
 148                         len = count;
 149                         break;
 150                 default:
 151                         continue;
 152                 }
 153
 154                 vdev->res[type].count = count;
 155                 vdev->res[type].vaddr = (char __iomem *)bar->vaddr + bar_offset;
 156         }
 157
 158         return 0;
 159 }
 160
 161 unsigned int vnic_dev_get_res_count(struct vnic_dev *vdev,
 162         enum vnic_res_type type)
 163 {
 164         return vdev->res[type].count;
 165 }
 166
 167 void __iomem *vnic_dev_get_res(struct vnic_dev *vdev, enum vnic_res_type type,
 168         unsigned int index)
 169 {
 170         if (!vdev->res[type].vaddr)
 171                 return NULL;
 172
 173         switch (type) {
 174         case RES_TYPE_WQ:
 175         case RES_TYPE_RQ:
 176         case RES_TYPE_CQ:
 177         case RES_TYPE_INTR_CTRL:
 178                 return (char __iomem *)vdev->res[type].vaddr +
 179                                         index * VNIC_RES_STRIDE;
 180         default:
 181                 return (char __iomem *)vdev->res[type].vaddr;
 182         }
 183 }
 184
 185 unsigned int vnic_dev_desc_ring_size(struct vnic_dev_ring *ring,
 186                                      unsigned int desc_count,
 187                                      unsigned int desc_size)
 188 {
 189         /* The base address of the desc rings must be 512 byte aligned.
 190          * Descriptor count is aligned to groups of 32 descriptors.  A
 191          * count of 0 means the maximum 4096 descriptors.  Descriptor
 192          * size is aligned to 16 bytes.
 193          */
 194
 195         unsigned int count_align = 32;
 196         unsigned int desc_align = 16;
 197
 198         ring->base_align = 512;
 199
 200         if (desc_count == 0)
 201                 desc_count = 4096;
 202
 203         ring->desc_count = ALIGN(desc_count, count_align);
 204
 205         ring->desc_size = ALIGN(desc_size, desc_align);
 206
 207         ring->size = ring->desc_count * ring->desc_size;
 208         ring->size_unaligned = ring->size + ring->base_align;
 209
 210         return ring->size_unaligned;
 211 }
 212
 213 void vnic_dev_clear_desc_ring(struct vnic_dev_ring *ring)
 214 {
 215         memset(ring->descs, 0, ring->size);
 216 }
 217
 218 int vnic_dev_alloc_desc_ring(struct vnic_dev *vdev, struct vnic_dev_ring *ring,
 219         unsigned int desc_count, unsigned int desc_size)
 220 {
 221         vnic_dev_desc_ring_size(ring, desc_count, desc_size);
 222
 223         ring->descs_unaligned = dma_alloc_coherent(&vdev->pdev->dev,
 224                 ring->size_unaligned,
 225                 &ring->base_addr_unaligned, GFP_KERNEL);
 226
 227         if (!ring->descs_unaligned) {
 228                 printk(KERN_ERR
 229                   "Failed to allocate ring (size=%d), aborting\n",
 230                         (int)ring->size);
 231                 return -ENOMEM;
 232         }
 233
 234         ring->base_addr = ALIGN(ring->base_addr_unaligned,
 235                 ring->base_align);
 236         ring->descs = (u8 *)ring->descs_unaligned +
 237                 (ring->base_addr - ring->base_addr_unaligned);
 238
 239         vnic_dev_clear_desc_ring(ring);
 240
 241         ring->desc_avail = ring->desc_count - 1;
 242
 243         return 0;
 244 }
 245
 246 void vnic_dev_free_desc_ring(struct vnic_dev *vdev, struct vnic_dev_ring *ring)
 247 {
 248         if (ring->descs) {
 249                 dma_free_coherent(&vdev->pdev->dev,
 250                         ring->size_unaligned,
 251                         ring->descs_unaligned,
 252                         ring->base_addr_unaligned);
 253                 ring->descs = NULL;
 254         }
 255 }
 256
 257 static int vnic_dev_cmd1(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd, int wait)
 258 {
 259         struct vnic_devcmd __iomem *devcmd = vdev->devcmd;
 260         int delay;
 261         u32 status;
 262         static const int dev_cmd_err[] = {
 263                 /* convert from fw's version of error.h to host's version */
 264                 0,      /* ERR_SUCCESS */
 265                 EINVAL, /* ERR_EINVAL */
 266                 EFAULT, /* ERR_EFAULT */
 267                 EPERM,  /* ERR_EPERM */
 268                 EBUSY,  /* ERR_EBUSY */
 269         };
 270         int err;
 271         u64 *a0 = &vdev->args[0];
 272         u64 *a1 = &vdev->args[1];
 273
 274         status = ioread32(&devcmd->status);
 275         if (status & STAT_BUSY) {
 276                 printk(KERN_ERR "Busy devcmd %d\n", _CMD_N(cmd));
 277                 return -EBUSY;
 278         }
 279
 280         if (_CMD_DIR(cmd) & _CMD_DIR_WRITE) {
 281                 writeq(*a0, &devcmd->args[0]);
 282                 writeq(*a1, &devcmd->args[1]);
 283                 wmb();
 284         }
 285
 286         iowrite32(cmd, &devcmd->cmd);
 287
 288         if ((_CMD_FLAGS(cmd) & _CMD_FLAGS_NOWAIT))
 289                         return 0;
 290
 291         for (delay = 0; delay < wait; delay++) {
 292
 293                 udelay(100);
 294
 295                 status = ioread32(&devcmd->status);
 296                 if (!(status & STAT_BUSY)) {
 297
 298                         if (status & STAT_ERROR) {
 299                                 err = dev_cmd_err[(int)readq(&devcmd->args[0])];
 300                                 printk(KERN_ERR "Error %d devcmd %d\n",
 301                                         err, _CMD_N(cmd));
 302                                 return -err;
 303                         }
 304
 305                         if (_CMD_DIR(cmd) & _CMD_DIR_READ) {
 306                                 rmb();
 307                                 *a0 = readq(&devcmd->args[0]);
 308                                 *a1 = readq(&devcmd->args[1]);
 309                         }
 310
 311                         return 0;
 312                 }
 313         }
 314
 315         printk(KERN_ERR "Timedout devcmd %d\n", _CMD_N(cmd));
 316         return -ETIMEDOUT;
 317 }
 318
 319 static int vnic_dev_cmd2(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd,
 320                 int wait)
 321 {
 322         struct devcmd2_controller *dc2c = vdev->devcmd2;
 323         struct devcmd2_result *result;
 324         u8 color;
 325         unsigned int i;
 326         int delay;
 327         int err;
 328         u32 fetch_index;
 329         u32 posted;
 330         u32 new_posted;
 331
 332         posted = ioread32(&dc2c->wq_ctrl->posted_index);
 333         fetch_index = ioread32(&dc2c->wq_ctrl->fetch_index);
 334
 335         if (posted == 0xFFFFFFFF || fetch_index == 0xFFFFFFFF) {
 336                 /* Hardware surprise removal: return error */
 337                 pr_err("%s: devcmd2 invalid posted or fetch index on cmd %d\n",
 338                                 pci_name(vdev->pdev), _CMD_N(cmd));
 339                 pr_err("%s: fetch index: %u, posted index: %u\n",
 340                                 pci_name(vdev->pdev), fetch_index, posted);
 341
 342                 return -ENODEV;
 343
 344         }
 345
 346         new_posted = (posted + 1) % DEVCMD2_RING_SIZE;
 347
 348         if (new_posted == fetch_index) {
 349                 pr_err("%s: devcmd2 wq full while issuing cmd %d\n",
 350                                 pci_name(vdev->pdev), _CMD_N(cmd));
 351                 pr_err("%s: fetch index: %u, posted index: %u\n",
 352                                 pci_name(vdev->pdev), fetch_index, posted);
 353                 return -EBUSY;
 354
 355         }
 356         dc2c->cmd_ring[posted].cmd = cmd;
 357         dc2c->cmd_ring[posted].flags = 0;
 358
 359         if ((_CMD_FLAGS(cmd) & _CMD_FLAGS_NOWAIT))
 360                 dc2c->cmd_ring[posted].flags |= DEVCMD2_FNORESULT;
 361         if (_CMD_DIR(cmd) & _CMD_DIR_WRITE) {
 362                 for (i = 0; i < VNIC_DEVCMD_NARGS; i++)
 363                         dc2c->cmd_ring[posted].args[i] = vdev->args[i];
 364
 365         }
 366
 367         /* Adding write memory barrier prevents compiler and/or CPU
 368          * reordering, thus avoiding descriptor posting before
 369          * descriptor is initialized. Otherwise, hardware can read
 370          * stale descriptor fields.
 371          */
 372         wmb();
 373         iowrite32(new_posted, &dc2c->wq_ctrl->posted_index);
 374
 375         if (dc2c->cmd_ring[posted].flags & DEVCMD2_FNORESULT)
 376                 return 0;
 377
 378         result = dc2c->result + dc2c->next_result;
 379         color = dc2c->color;
 380
 381         dc2c->next_result++;
 382         if (dc2c->next_result == dc2c->result_size) {
 383                 dc2c->next_result = 0;
 384                 dc2c->color = dc2c->color ? 0 : 1;
 385         }
 386
 387         for (delay = 0; delay < wait; delay++) {
 388                 udelay(100);
 389                 if (result->color == color) {
 390                         if (result->error) {
 391                                 err = -(int) result->error;
 392                                 if (err != ERR_ECMDUNKNOWN ||
 393                                                 cmd != CMD_CAPABILITY)
 394                                         pr_err("%s:Error %d devcmd %d\n",
 395                                                 pci_name(vdev->pdev),
 396                                                 err, _CMD_N(cmd));
 397                                 return err;
 398                         }
 399                         if (_CMD_DIR(cmd) & _CMD_DIR_READ) {
 400                                 rmb(); /*prevent reorder while reding result*/
 401                                 for (i = 0; i < VNIC_DEVCMD_NARGS; i++)
 402                                         vdev->args[i] = result->results[i];
 403                         }
 404                         return 0;
 405                 }
 406         }
 407
 408         pr_err("%s:Timed out devcmd %d\n", pci_name(vdev->pdev), _CMD_N(cmd));
 409
 410         return -ETIMEDOUT;
 411 }
 412
 413
 414 static int vnic_dev_init_devcmd1(struct vnic_dev *vdev)
 415 {
 416         vdev->devcmd = vnic_dev_get_res(vdev, RES_TYPE_DEVCMD, 0);
 417         if (!vdev->devcmd)
 418                 return -ENODEV;
 419
 420         vdev->devcmd_rtn = &vnic_dev_cmd1;
 421         return 0;
 422 }
 423
 424
 425 static int vnic_dev_init_devcmd2(struct vnic_dev *vdev)
 426 {
 427         int err;
 428         unsigned int fetch_index;
 429
 430         if (vdev->devcmd2)
 431                 return 0;
 432
 433         vdev->devcmd2 = kzalloc(sizeof(*vdev->devcmd2), GFP_ATOMIC);
 434         if (!vdev->devcmd2)
 435                 return -ENOMEM;
 436
 437         vdev->devcmd2->color = 1;
 438         vdev->devcmd2->result_size = DEVCMD2_RING_SIZE;
 439         err = vnic_wq_devcmd2_alloc(vdev, &vdev->devcmd2->wq,
 440                                 DEVCMD2_RING_SIZE, DEVCMD2_DESC_SIZE);
 441         if (err)
 442                 goto err_free_devcmd2;
 443
 444         fetch_index = ioread32(&vdev->devcmd2->wq.ctrl->fetch_index);
 445         if (fetch_index == 0xFFFFFFFF) { /* check for hardware gone  */
 446                 pr_err("error in devcmd2 init");
 447                 return -ENODEV;
 448         }
 449
 450         /*
 451          * Don't change fetch_index ever and
 452          * set posted_index same as fetch_index
 453          * when setting up the WQ for devcmd2.
 454          */
 455         vnic_wq_init_start(&vdev->devcmd2->wq, 0, fetch_index,
 456                         fetch_index, 0, 0);
 457
 458         vnic_wq_enable(&vdev->devcmd2->wq);
 459
 460         err = vnic_dev_alloc_desc_ring(vdev, &vdev->devcmd2->results_ring,
 461                         DEVCMD2_RING_SIZE, DEVCMD2_DESC_SIZE);
 462         if (err)
 463                 goto err_free_wq;
 464
 465         vdev->devcmd2->result =
 466                 (struct devcmd2_result *) vdev->devcmd2->results_ring.descs;
 467         vdev->devcmd2->cmd_ring =
 468                 (struct vnic_devcmd2 *) vdev->devcmd2->wq.ring.descs;
 469         vdev->devcmd2->wq_ctrl = vdev->devcmd2->wq.ctrl;
 470         vdev->args[0] = (u64) vdev->devcmd2->results_ring.base_addr |
 471                                 VNIC_PADDR_TARGET;
 472         vdev->args[1] = DEVCMD2_RING_SIZE;
 473
 474         err = vnic_dev_cmd2(vdev, CMD_INITIALIZE_DEVCMD2, 1000);
 475         if (err)
 476                 goto err_free_desc_ring;
 477
 478         vdev->devcmd_rtn = &vnic_dev_cmd2;
 479
 480         return 0;
 481
 482 err_free_desc_ring:
 483         vnic_dev_free_desc_ring(vdev, &vdev->devcmd2->results_ring);
 484 err_free_wq:
 485         vnic_wq_disable(&vdev->devcmd2->wq);
 486         vnic_wq_free(&vdev->devcmd2->wq);
 487 err_free_devcmd2:
 488         kfree(vdev->devcmd2);
 489         vdev->devcmd2 = NULL;
 490
 491         return err;
 492 }
 493
 494
 495 static void vnic_dev_deinit_devcmd2(struct vnic_dev *vdev)
 496 {
 497         vnic_dev_free_desc_ring(vdev, &vdev->devcmd2->results_ring);
 498         vnic_wq_disable(&vdev->devcmd2->wq);
 499         vnic_wq_free(&vdev->devcmd2->wq);
 500         kfree(vdev->devcmd2);
 501         vdev->devcmd2 = NULL;
 502         vdev->devcmd_rtn = &vnic_dev_cmd1;
 503 }
 504
 505
 506 static int vnic_dev_cmd_no_proxy(struct vnic_dev *vdev,
 507         enum vnic_devcmd_cmd cmd, u64 *a0, u64 *a1, int wait)
 508 {
 509         int err;
 510
 511         vdev->args[0] = *a0;
 512         vdev->args[1] = *a1;
 513
 514         err = (*vdev->devcmd_rtn)(vdev, cmd, wait);
 515
 516         *a0 = vdev->args[0];
 517         *a1 = vdev->args[1];
 518
 519         return err;
 520 }
 521
 522
 523 int vnic_dev_cmd(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd,
 524         u64 *a0, u64 *a1, int wait)
 525 {
 526         memset(vdev->args, 0, sizeof(vdev->args));
 527
 528         switch (vdev->proxy) {
 529         case PROXY_NONE:
 530         default:
 531                 return vnic_dev_cmd_no_proxy(vdev, cmd, a0, a1, wait);
 532         }
 533 }
 534
 535
 536 int vnic_dev_fw_info(struct vnic_dev *vdev,
 537         struct vnic_devcmd_fw_info **fw_info)
 538 {
 539         u64 a0, a1 = 0;
 540         int wait = 1000;
 541         int err = 0;
 542
 543         if (!vdev->fw_info) {
 544                 vdev->fw_info = dma_alloc_coherent(&vdev->pdev->dev,
 545                         sizeof(struct vnic_devcmd_fw_info),
 546                         &vdev->fw_info_pa, GFP_KERNEL);
 547                 if (!vdev->fw_info)
 548                         return -ENOMEM;
 549
 550                 a0 = vdev->fw_info_pa;
 551
 552                 /* only get fw_info once and cache it */
 553                 err = vnic_dev_cmd(vdev, CMD_MCPU_FW_INFO, &a0, &a1, wait);
 554         }
 555
 556         *fw_info = vdev->fw_info;
 557
 558         return err;
 559 }
 560
 561 int vnic_dev_spec(struct vnic_dev *vdev, unsigned int offset, unsigned int size,
 562         void *value)
 563 {
 564         u64 a0, a1;
 565         int wait = 1000;
 566         int err;
 567
 568         a0 = offset;
 569         a1 = size;
 570
 571         err = vnic_dev_cmd(vdev, CMD_DEV_SPEC, &a0, &a1, wait);
 572
 573         switch (size) {
 574         case 1:
 575                 *(u8 *)value = (u8)a0;
 576                 break;
 577         case 2:
 578                 *(u16 *)value = (u16)a0;
 579                 break;
 580         case 4:
 581                 *(u32 *)value = (u32)a0;
 582                 break;
 583         case 8:
 584                 *(u64 *)value = a0;
 585                 break;
 586         default:
 587                 BUG();
 588                 break;
 589         }
 590
 591         return err;
 592 }
 593
 594 int vnic_dev_stats_clear(struct vnic_dev *vdev)
 595 {
 596         u64 a0 = 0, a1 = 0;
 597         int wait = 1000;
 598         return vnic_dev_cmd(vdev, CMD_STATS_CLEAR, &a0, &a1, wait);
 599 }
 600
 601 int vnic_dev_stats_dump(struct vnic_dev *vdev, struct vnic_stats **stats)
 602 {
 603         u64 a0, a1;
 604         int wait = 1000;
 605
 606         if (!vdev->stats) {
 607                 vdev->stats = dma_alloc_coherent(&vdev->pdev->dev,
 608                         sizeof(struct vnic_stats), &vdev->stats_pa, GFP_KERNEL);
 609                 if (!vdev->stats)
 610                         return -ENOMEM;
 611         }
 612
 613         *stats = vdev->stats;
 614         a0 = vdev->stats_pa;
 615         a1 = sizeof(struct vnic_stats);
 616
 617         return vnic_dev_cmd(vdev, CMD_STATS_DUMP, &a0, &a1, wait);
 618 }
 619
 620 int vnic_dev_close(struct vnic_dev *vdev)
 621 {
 622         u64 a0 = 0, a1 = 0;
 623         int wait = 1000;
 624         return vnic_dev_cmd(vdev, CMD_CLOSE, &a0, &a1, wait);
 625 }
 626
 627 int vnic_dev_enable(struct vnic_dev *vdev)
 628 {
 629         u64 a0 = 0, a1 = 0;
 630         int wait = 1000;
 631         return vnic_dev_cmd(vdev, CMD_ENABLE, &a0, &a1, wait);
 632 }
 633
 634 int vnic_dev_disable(struct vnic_dev *vdev)
 635 {
 636         u64 a0 = 0, a1 = 0;
 637         int wait = 1000;
 638         return vnic_dev_cmd(vdev, CMD_DISABLE, &a0, &a1, wait);
 639 }
 640
 641 int vnic_dev_open(struct vnic_dev *vdev, int arg)
 642 {
 643         u64 a0 = (u32)arg, a1 = 0;
 644         int wait = 1000;
 645         return vnic_dev_cmd(vdev, CMD_OPEN, &a0, &a1, wait);
 646 }
 647
 648 int vnic_dev_open_done(struct vnic_dev *vdev, int *done)
 649 {
 650         u64 a0 = 0, a1 = 0;
 651         int wait = 1000;
 652         int err;
 653
 654         *done = 0;
 655
 656         err = vnic_dev_cmd(vdev, CMD_OPEN_STATUS, &a0, &a1, wait);
 657         if (err)
 658                 return err;
 659
 660         *done = (a0 == 0);
 661
 662         return 0;
 663 }
 664
 665 int vnic_dev_soft_reset(struct vnic_dev *vdev, int arg)
 666 {
 667         u64 a0 = (u32)arg, a1 = 0;
 668         int wait = 1000;
 669         return vnic_dev_cmd(vdev, CMD_SOFT_RESET, &a0, &a1, wait);
 670 }
 671
 672 int vnic_dev_soft_reset_done(struct vnic_dev *vdev, int *done)
 673 {
 674         u64 a0 = 0, a1 = 0;
 675         int wait = 1000;
 676         int err;
 677
 678         *done = 0;
 679
 680         err = vnic_dev_cmd(vdev, CMD_SOFT_RESET_STATUS, &a0, &a1, wait);
 681         if (err)
 682                 return err;
 683
 684         *done = (a0 == 0);
 685
 686         return 0;
 687 }
 688
 689 int vnic_dev_hang_notify(struct vnic_dev *vdev)
 690 {
 691         u64 a0 = 0, a1 = 0;
 692         int wait = 1000;
 693         return vnic_dev_cmd(vdev, CMD_HANG_NOTIFY, &a0, &a1, wait);
 694 }
 695
 696 int vnic_dev_mac_addr(struct vnic_dev *vdev, u8 *mac_addr)
 697 {
 698         u64 a[2] = {};
 699         int wait = 1000;
 700         int err, i;
 701
 702         for (i = 0; i < ETH_ALEN; i++)
 703                 mac_addr[i] = 0;
 704
 705         err = vnic_dev_cmd(vdev, CMD_MAC_ADDR, &a[0], &a[1], wait);
 706         if (err)
 707                 return err;
 708
 709         for (i = 0; i < ETH_ALEN; i++)
 710                 mac_addr[i] = ((u8 *)&a)[i];
 711
 712         return 0;
 713 }
 714
 715 void vnic_dev_packet_filter(struct vnic_dev *vdev, int directed, int multicast,
 716         int broadcast, int promisc, int allmulti)
 717 {
 718         u64 a0, a1 = 0;
 719         int wait = 1000;
 720         int err;
 721
 722         a0 = (directed ? CMD_PFILTER_DIRECTED : 0) |
 723              (multicast ? CMD_PFILTER_MULTICAST : 0) |
 724              (broadcast ? CMD_PFILTER_BROADCAST : 0) |
 725              (promisc ? CMD_PFILTER_PROMISCUOUS : 0) |
 726              (allmulti ? CMD_PFILTER_ALL_MULTICAST : 0);
 727
 728         err = vnic_dev_cmd(vdev, CMD_PACKET_FILTER, &a0, &a1, wait);
 729         if (err)
 730                 printk(KERN_ERR "Can't set packet filter\n");
 731 }
 732
 733 void vnic_dev_add_addr(struct vnic_dev *vdev, u8 *addr)
 734 {
 735         u64 a[2] = {};
 736         int wait = 1000;
 737         int err;
 738         int i;
 739
 740         for (i = 0; i < ETH_ALEN; i++)
 741                 ((u8 *)&a)[i] = addr[i];
 742
 743         err = vnic_dev_cmd(vdev, CMD_ADDR_ADD, &a[0], &a[1], wait);
 744         if (err)
 745                 pr_err("Can't add addr [%pM], %d\n", addr, err);
 746 }
 747
 748 void vnic_dev_del_addr(struct vnic_dev *vdev, u8 *addr)
 749 {
 750         u64 a[2] = {};
 751         int wait = 1000;
 752         int err;
 753         int i;
 754
 755         for (i = 0; i < ETH_ALEN; i++)
 756                 ((u8 *)&a)[i] = addr[i];
 757
 758         err = vnic_dev_cmd(vdev, CMD_ADDR_DEL, &a[0], &a[1], wait);
 759         if (err)
 760                 pr_err("Can't del addr [%pM], %d\n", addr, err);
 761 }
 762
 763 int vnic_dev_notify_set(struct vnic_dev *vdev, u16 intr)
 764 {
 765         u64 a0, a1;
 766         int wait = 1000;
 767
 768         if (!vdev->notify) {
 769                 vdev->notify = dma_alloc_coherent(&vdev->pdev->dev,
 770                         sizeof(struct vnic_devcmd_notify),
 771                         &vdev->notify_pa, GFP_KERNEL);
 772                 if (!vdev->notify)
 773                         return -ENOMEM;
 774         }
 775
 776         a0 = vdev->notify_pa;
 777         a1 = ((u64)intr << 32) & 0x0000ffff00000000ULL;
 778         a1 += sizeof(struct vnic_devcmd_notify);
 779
 780         return vnic_dev_cmd(vdev, CMD_NOTIFY, &a0, &a1, wait);
 781 }
 782
 783 void vnic_dev_notify_unset(struct vnic_dev *vdev)
 784 {
 785         u64 a0, a1;
 786         int wait = 1000;
 787
 788         a0 = 0;  /* paddr = 0 to unset notify buffer */
 789         a1 = 0x0000ffff00000000ULL; /* intr num = -1 to unreg for intr */
 790         a1 += sizeof(struct vnic_devcmd_notify);
 791
 792         vnic_dev_cmd(vdev, CMD_NOTIFY, &a0, &a1, wait);
 793 }
 794
 795 static int vnic_dev_notify_ready(struct vnic_dev *vdev)
 796 {
 797         u32 *words;
 798         unsigned int nwords = sizeof(struct vnic_devcmd_notify) / 4;
 799         unsigned int i;
 800         u32 csum;
 801
 802         if (!vdev->notify)
 803                 return 0;
 804
 805         do {
 806                 csum = 0;
 807                 memcpy(&vdev->notify_copy, vdev->notify,
 808                         sizeof(struct vnic_devcmd_notify));
 809                 words = (u32 *)&vdev->notify_copy;
 810                 for (i = 1; i < nwords; i++)
 811                         csum += words[i];
 812         } while (csum != words[0]);
 813
 814         return 1;
 815 }
 816
 817 int vnic_dev_init(struct vnic_dev *vdev, int arg)
 818 {
 819         u64 a0 = (u32)arg, a1 = 0;
 820         int wait = 1000;
 821         return vnic_dev_cmd(vdev, CMD_INIT, &a0, &a1, wait);
 822 }
 823
 824 u16 vnic_dev_set_default_vlan(struct vnic_dev *vdev, u16 new_default_vlan)
 825 {
 826         u64 a0 = new_default_vlan, a1 = 0;
 827         int wait = 1000;
 828         int old_vlan = 0;
 829
 830         old_vlan = vnic_dev_cmd(vdev, CMD_SET_DEFAULT_VLAN, &a0, &a1, wait);
 831         return (u16)old_vlan;
 832 }
 833
 834 int vnic_dev_link_status(struct vnic_dev *vdev)
 835 {
 836         if (vdev->linkstatus)
 837                 return *vdev->linkstatus;
 838
 839         if (!vnic_dev_notify_ready(vdev))
 840                 return 0;
 841
 842         return vdev->notify_copy.link_state;
 843 }
 844
 845 u32 vnic_dev_port_speed(struct vnic_dev *vdev)
 846 {
 847         if (!vnic_dev_notify_ready(vdev))
 848                 return 0;
 849
 850         return vdev->notify_copy.port_speed;
 851 }
 852
 853 u32 vnic_dev_msg_lvl(struct vnic_dev *vdev)
 854 {
 855         if (!vnic_dev_notify_ready(vdev))
 856                 return 0;
 857
 858         return vdev->notify_copy.msglvl;
 859 }
 860
 861 u32 vnic_dev_mtu(struct vnic_dev *vdev)
 862 {
 863         if (!vnic_dev_notify_ready(vdev))
 864                 return 0;
 865
 866         return vdev->notify_copy.mtu;
 867 }
 868
 869 u32 vnic_dev_link_down_cnt(struct vnic_dev *vdev)
 870 {
 871         if (!vnic_dev_notify_ready(vdev))
 872                 return 0;
 873
 874         return vdev->notify_copy.link_down_cnt;
 875 }
 876
 877 void vnic_dev_set_intr_mode(struct vnic_dev *vdev,
 878         enum vnic_dev_intr_mode intr_mode)
 879 {
 880         vdev->intr_mode = intr_mode;
 881 }
 882
 883 enum vnic_dev_intr_mode vnic_dev_get_intr_mode(
 884         struct vnic_dev *vdev)
 885 {
 886         return vdev->intr_mode;
 887 }
 888
 889 void vnic_dev_unregister(struct vnic_dev *vdev)
 890 {
 891         if (vdev) {
 892                 if (vdev->notify)
 893                         dma_free_coherent(&vdev->pdev->dev,
 894                                 sizeof(struct vnic_devcmd_notify),
 895                                 vdev->notify,
 896                                 vdev->notify_pa);
 897                 if (vdev->linkstatus)
 898                         dma_free_coherent(&vdev->pdev->dev,
 899                                 sizeof(u32),
 900                                 vdev->linkstatus,
 901                                 vdev->linkstatus_pa);
 902                 if (vdev->stats)
 903                         dma_free_coherent(&vdev->pdev->dev,
 904                                 sizeof(struct vnic_stats),
 905                                 vdev->stats, vdev->stats_pa);
 906                 if (vdev->fw_info)
 907                         dma_free_coherent(&vdev->pdev->dev,
 908                                 sizeof(struct vnic_devcmd_fw_info),
 909                                 vdev->fw_info, vdev->fw_info_pa);
 910                 if (vdev->devcmd2)
 911                         vnic_dev_deinit_devcmd2(vdev);
 912                 kfree(vdev);
 913         }
 914 }
 915
 916 struct vnic_dev *vnic_dev_register(struct vnic_dev *vdev,
 917         void *priv, struct pci_dev *pdev, struct vnic_dev_bar *bar)
 918 {
 919         if (!vdev) {
 920                 vdev = kzalloc(sizeof(struct vnic_dev), GFP_KERNEL);
 921                 if (!vdev)
 922                         return NULL;
 923         }
 924
 925         vdev->priv = priv;
 926         vdev->pdev = pdev;
 927
 928         if (vnic_dev_discover_res(vdev, bar))
 929                 goto err_out;
 930
 931         return vdev;
 932
 933 err_out:
 934         vnic_dev_unregister(vdev);
 935         return NULL;
 936 }
 937
 938 int vnic_dev_cmd_init(struct vnic_dev *vdev)
 939 {
 940         int err;
 941         void *p;
 942
 943         p = vnic_dev_get_res(vdev, RES_TYPE_DEVCMD2, 0);
 944         if (p) {
 945                 pr_err("fnic: DEVCMD2 resource found!\n");
 946                 err = vnic_dev_init_devcmd2(vdev);
 947         } else {
 948                 pr_err("fnic: DEVCMD2 not found, fall back to Devcmd\n");
 949                 err = vnic_dev_init_devcmd1(vdev);
 950         }
 951
 952         return err;
 953 }