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 PROXY_BY_INDEX, 36 }; 37 38 struct vnic_res { 39 void __iomem *vaddr; 40 dma_addr_t bus_addr; 41 unsigned int count; 42 }; 43 44 struct vnic_intr_coal_timer_info { 45 u32 mul; 46 u32 div; 47 u32 max_usec; 48 }; 49 50 struct vnic_dev { 51 void *priv; 52 struct pci_dev *pdev; 53 struct vnic_res res[RES_TYPE_MAX]; 54 enum vnic_dev_intr_mode intr_mode; 55 struct vnic_devcmd __iomem *devcmd; 56 struct vnic_devcmd_notify *notify; 57 struct vnic_devcmd_notify notify_copy; 58 dma_addr_t notify_pa; 59 u32 notify_sz; 60 dma_addr_t linkstatus_pa; 61 struct vnic_stats *stats; 62 dma_addr_t stats_pa; 63 struct vnic_devcmd_fw_info *fw_info; 64 dma_addr_t fw_info_pa; 65 enum vnic_proxy_type proxy; 66 u32 proxy_index; 67 u64 args[VNIC_DEVCMD_NARGS]; 68 struct vnic_intr_coal_timer_info intr_coal_timer_info; 69 }; 70 71 #define VNIC_MAX_RES_HDR_SIZE \ 72 (sizeof(struct vnic_resource_header) + \ 73 sizeof(struct vnic_resource) * RES_TYPE_MAX) 74 #define VNIC_RES_STRIDE 128 75 76 void *vnic_dev_priv(struct vnic_dev *vdev) 77 { 78 return vdev->priv; 79 } 80 81 static int vnic_dev_discover_res(struct vnic_dev *vdev, 82 struct vnic_dev_bar *bar, unsigned int num_bars) 83 { 84 struct vnic_resource_header __iomem *rh; 85 struct mgmt_barmap_hdr __iomem *mrh; 86 struct vnic_resource __iomem *r; 87 u8 type; 88 89 if (num_bars == 0) 90 return -EINVAL; 91 92 if (bar->len < VNIC_MAX_RES_HDR_SIZE) { 93 pr_err("vNIC BAR0 res hdr length error\n"); 94 return -EINVAL; 95 } 96 97 rh = bar->vaddr; 98 mrh = bar->vaddr; 99 if (!rh) { 100 pr_err("vNIC BAR0 res hdr not mem-mapped\n"); 101 return -EINVAL; 102 } 103 104 /* Check for mgmt vnic in addition to normal vnic */ 105 if ((ioread32(&rh->magic) != VNIC_RES_MAGIC) || 106 (ioread32(&rh->version) != VNIC_RES_VERSION)) { 107 if ((ioread32(&mrh->magic) != MGMTVNIC_MAGIC) || 108 (ioread32(&mrh->version) != MGMTVNIC_VERSION)) { 109 pr_err("vNIC BAR0 res magic/version error " 110 "exp (%lx/%lx) or (%lx/%lx), curr (%x/%x)\n", 111 VNIC_RES_MAGIC, VNIC_RES_VERSION, 112 MGMTVNIC_MAGIC, MGMTVNIC_VERSION, 113 ioread32(&rh->magic), ioread32(&rh->version)); 114 return -EINVAL; 115 } 116 } 117 118 if (ioread32(&mrh->magic) == MGMTVNIC_MAGIC) 119 r = (struct vnic_resource __iomem *)(mrh + 1); 120 else 121 r = (struct vnic_resource __iomem *)(rh + 1); 122 123 124 while ((type = ioread8(&r->type)) != RES_TYPE_EOL) { 125 126 u8 bar_num = ioread8(&r->bar); 127 u32 bar_offset = ioread32(&r->bar_offset); 128 u32 count = ioread32(&r->count); 129 u32 len; 130 131 r++; 132 133 if (bar_num >= num_bars) 134 continue; 135 136 if (!bar[bar_num].len || !bar[bar_num].vaddr) 137 continue; 138 139 switch (type) { 140 case RES_TYPE_WQ: 141 case RES_TYPE_RQ: 142 case RES_TYPE_CQ: 143 case RES_TYPE_INTR_CTRL: 144 /* each count is stride bytes long */ 145 len = count * VNIC_RES_STRIDE; 146 if (len + bar_offset > bar[bar_num].len) { 147 pr_err("vNIC BAR0 resource %d " 148 "out-of-bounds, offset 0x%x + " 149 "size 0x%x > bar len 0x%lx\n", 150 type, bar_offset, 151 len, 152 bar[bar_num].len); 153 return -EINVAL; 154 } 155 break; 156 case RES_TYPE_INTR_PBA_LEGACY: 157 case RES_TYPE_DEVCMD: 158 len = count; 159 break; 160 default: 161 continue; 162 } 163 164 vdev->res[type].count = count; 165 vdev->res[type].vaddr = (char __iomem *)bar[bar_num].vaddr + 166 bar_offset; 167 vdev->res[type].bus_addr = bar[bar_num].bus_addr + bar_offset; 168 } 169 170 return 0; 171 } 172 173 unsigned int vnic_dev_get_res_count(struct vnic_dev *vdev, 174 enum vnic_res_type type) 175 { 176 return vdev->res[type].count; 177 } 178 EXPORT_SYMBOL(vnic_dev_get_res_count); 179 180 void __iomem *vnic_dev_get_res(struct vnic_dev *vdev, enum vnic_res_type type, 181 unsigned int index) 182 { 183 if (!vdev->res[type].vaddr) 184 return NULL; 185 186 switch (type) { 187 case RES_TYPE_WQ: 188 case RES_TYPE_RQ: 189 case RES_TYPE_CQ: 190 case RES_TYPE_INTR_CTRL: 191 return (char __iomem *)vdev->res[type].vaddr + 192 index * VNIC_RES_STRIDE; 193 default: 194 return (char __iomem *)vdev->res[type].vaddr; 195 } 196 } 197 EXPORT_SYMBOL(vnic_dev_get_res); 198 199 static unsigned int vnic_dev_desc_ring_size(struct vnic_dev_ring *ring, 200 unsigned int desc_count, unsigned int desc_size) 201 { 202 /* The base address of the desc rings must be 512 byte aligned. 203 * Descriptor count is aligned to groups of 32 descriptors. A 204 * count of 0 means the maximum 4096 descriptors. Descriptor 205 * size is aligned to 16 bytes. 206 */ 207 208 unsigned int count_align = 32; 209 unsigned int desc_align = 16; 210 211 ring->base_align = 512; 212 213 if (desc_count == 0) 214 desc_count = 4096; 215 216 ring->desc_count = ALIGN(desc_count, count_align); 217 218 ring->desc_size = ALIGN(desc_size, desc_align); 219 220 ring->size = ring->desc_count * ring->desc_size; 221 ring->size_unaligned = ring->size + ring->base_align; 222 223 return ring->size_unaligned; 224 } 225 226 void vnic_dev_clear_desc_ring(struct vnic_dev_ring *ring) 227 { 228 memset(ring->descs, 0, ring->size); 229 } 230 231 int vnic_dev_alloc_desc_ring(struct vnic_dev *vdev, struct vnic_dev_ring *ring, 232 unsigned int desc_count, unsigned int desc_size) 233 { 234 vnic_dev_desc_ring_size(ring, desc_count, desc_size); 235 236 ring->descs_unaligned = pci_alloc_consistent(vdev->pdev, 237 ring->size_unaligned, 238 &ring->base_addr_unaligned); 239 240 if (!ring->descs_unaligned) { 241 pr_err("Failed to allocate ring (size=%d), aborting\n", 242 (int)ring->size); 243 return -ENOMEM; 244 } 245 246 ring->base_addr = ALIGN(ring->base_addr_unaligned, 247 ring->base_align); 248 ring->descs = (u8 *)ring->descs_unaligned + 249 (ring->base_addr - ring->base_addr_unaligned); 250 251 vnic_dev_clear_desc_ring(ring); 252 253 ring->desc_avail = ring->desc_count - 1; 254 255 return 0; 256 } 257 258 void vnic_dev_free_desc_ring(struct vnic_dev *vdev, struct vnic_dev_ring *ring) 259 { 260 if (ring->descs) { 261 pci_free_consistent(vdev->pdev, 262 ring->size_unaligned, 263 ring->descs_unaligned, 264 ring->base_addr_unaligned); 265 ring->descs = NULL; 266 } 267 } 268 269 static int _vnic_dev_cmd(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd, 270 int wait) 271 { 272 struct vnic_devcmd __iomem *devcmd = vdev->devcmd; 273 unsigned int i; 274 int delay; 275 u32 status; 276 int err; 277 278 status = ioread32(&devcmd->status); 279 if (status == 0xFFFFFFFF) { 280 /* PCI-e target device is gone */ 281 return -ENODEV; 282 } 283 if (status & STAT_BUSY) { 284 pr_err("Busy devcmd %d\n", _CMD_N(cmd)); 285 return -EBUSY; 286 } 287 288 if (_CMD_DIR(cmd) & _CMD_DIR_WRITE) { 289 for (i = 0; i < VNIC_DEVCMD_NARGS; i++) 290 writeq(vdev->args[i], &devcmd->args[i]); 291 wmb(); 292 } 293 294 iowrite32(cmd, &devcmd->cmd); 295 296 if ((_CMD_FLAGS(cmd) & _CMD_FLAGS_NOWAIT)) 297 return 0; 298 299 for (delay = 0; delay < wait; delay++) { 300 301 udelay(100); 302 303 status = ioread32(&devcmd->status); 304 if (status == 0xFFFFFFFF) { 305 /* PCI-e target device is gone */ 306 return -ENODEV; 307 } 308 309 if (!(status & STAT_BUSY)) { 310 311 if (status & STAT_ERROR) { 312 err = (int)readq(&devcmd->args[0]); 313 if (err == ERR_EINVAL && 314 cmd == CMD_CAPABILITY) 315 return err; 316 if (err != ERR_ECMDUNKNOWN || 317 cmd != CMD_CAPABILITY) 318 pr_err("Error %d devcmd %d\n", 319 err, _CMD_N(cmd)); 320 return err; 321 } 322 323 if (_CMD_DIR(cmd) & _CMD_DIR_READ) { 324 rmb(); 325 for (i = 0; i < VNIC_DEVCMD_NARGS; i++) 326 vdev->args[i] = readq(&devcmd->args[i]); 327 } 328 329 return 0; 330 } 331 } 332 333 pr_err("Timedout devcmd %d\n", _CMD_N(cmd)); 334 return -ETIMEDOUT; 335 } 336 337 static int vnic_dev_cmd_proxy(struct vnic_dev *vdev, 338 enum vnic_devcmd_cmd proxy_cmd, enum vnic_devcmd_cmd cmd, 339 u64 *a0, u64 *a1, int wait) 340 { 341 u32 status; 342 int err; 343 344 memset(vdev->args, 0, sizeof(vdev->args)); 345 346 vdev->args[0] = vdev->proxy_index; 347 vdev->args[1] = cmd; 348 vdev->args[2] = *a0; 349 vdev->args[3] = *a1; 350 351 err = _vnic_dev_cmd(vdev, proxy_cmd, wait); 352 if (err) 353 return err; 354 355 status = (u32)vdev->args[0]; 356 if (status & STAT_ERROR) { 357 err = (int)vdev->args[1]; 358 if (err != ERR_ECMDUNKNOWN || 359 cmd != CMD_CAPABILITY) 360 pr_err("Error %d proxy devcmd %d\n", err, _CMD_N(cmd)); 361 return err; 362 } 363 364 *a0 = vdev->args[1]; 365 *a1 = vdev->args[2]; 366 367 return 0; 368 } 369 370 static int vnic_dev_cmd_no_proxy(struct vnic_dev *vdev, 371 enum vnic_devcmd_cmd cmd, u64 *a0, u64 *a1, int wait) 372 { 373 int err; 374 375 vdev->args[0] = *a0; 376 vdev->args[1] = *a1; 377 378 err = _vnic_dev_cmd(vdev, cmd, wait); 379 380 *a0 = vdev->args[0]; 381 *a1 = vdev->args[1]; 382 383 return err; 384 } 385 386 void vnic_dev_cmd_proxy_by_index_start(struct vnic_dev *vdev, u16 index) 387 { 388 vdev->proxy = PROXY_BY_INDEX; 389 vdev->proxy_index = index; 390 } 391 392 void vnic_dev_cmd_proxy_end(struct vnic_dev *vdev) 393 { 394 vdev->proxy = PROXY_NONE; 395 vdev->proxy_index = 0; 396 } 397 398 int vnic_dev_cmd(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd, 399 u64 *a0, u64 *a1, int wait) 400 { 401 memset(vdev->args, 0, sizeof(vdev->args)); 402 403 switch (vdev->proxy) { 404 case PROXY_BY_INDEX: 405 return vnic_dev_cmd_proxy(vdev, CMD_PROXY_BY_INDEX, cmd, 406 a0, a1, wait); 407 case PROXY_BY_BDF: 408 return vnic_dev_cmd_proxy(vdev, CMD_PROXY_BY_BDF, cmd, 409 a0, a1, wait); 410 case PROXY_NONE: 411 default: 412 return vnic_dev_cmd_no_proxy(vdev, cmd, a0, a1, wait); 413 } 414 } 415 416 static int vnic_dev_capable(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd) 417 { 418 u64 a0 = (u32)cmd, a1 = 0; 419 int wait = 1000; 420 int err; 421 422 err = vnic_dev_cmd(vdev, CMD_CAPABILITY, &a0, &a1, wait); 423 424 return !(err || a0); 425 } 426 427 int vnic_dev_fw_info(struct vnic_dev *vdev, 428 struct vnic_devcmd_fw_info **fw_info) 429 { 430 u64 a0, a1 = 0; 431 int wait = 1000; 432 int err = 0; 433 434 if (!vdev->fw_info) { 435 vdev->fw_info = pci_alloc_consistent(vdev->pdev, 436 sizeof(struct vnic_devcmd_fw_info), 437 &vdev->fw_info_pa); 438 if (!vdev->fw_info) 439 return -ENOMEM; 440 441 memset(vdev->fw_info, 0, sizeof(struct vnic_devcmd_fw_info)); 442 443 a0 = vdev->fw_info_pa; 444 a1 = sizeof(struct vnic_devcmd_fw_info); 445 446 /* only get fw_info once and cache it */ 447 if (vnic_dev_capable(vdev, CMD_MCPU_FW_INFO)) 448 err = vnic_dev_cmd(vdev, CMD_MCPU_FW_INFO, 449 &a0, &a1, wait); 450 else 451 err = vnic_dev_cmd(vdev, CMD_MCPU_FW_INFO_OLD, 452 &a0, &a1, wait); 453 } 454 455 *fw_info = vdev->fw_info; 456 457 return err; 458 } 459 460 int vnic_dev_spec(struct vnic_dev *vdev, unsigned int offset, unsigned int size, 461 void *value) 462 { 463 u64 a0, a1; 464 int wait = 1000; 465 int err; 466 467 a0 = offset; 468 a1 = size; 469 470 err = vnic_dev_cmd(vdev, CMD_DEV_SPEC, &a0, &a1, wait); 471 472 switch (size) { 473 case 1: *(u8 *)value = (u8)a0; break; 474 case 2: *(u16 *)value = (u16)a0; break; 475 case 4: *(u32 *)value = (u32)a0; break; 476 case 8: *(u64 *)value = a0; break; 477 default: BUG(); break; 478 } 479 480 return err; 481 } 482 483 int vnic_dev_stats_dump(struct vnic_dev *vdev, struct vnic_stats **stats) 484 { 485 u64 a0, a1; 486 int wait = 1000; 487 488 if (!vdev->stats) { 489 vdev->stats = pci_alloc_consistent(vdev->pdev, 490 sizeof(struct vnic_stats), &vdev->stats_pa); 491 if (!vdev->stats) 492 return -ENOMEM; 493 } 494 495 *stats = vdev->stats; 496 a0 = vdev->stats_pa; 497 a1 = sizeof(struct vnic_stats); 498 499 return vnic_dev_cmd(vdev, CMD_STATS_DUMP, &a0, &a1, wait); 500 } 501 502 int vnic_dev_close(struct vnic_dev *vdev) 503 { 504 u64 a0 = 0, a1 = 0; 505 int wait = 1000; 506 return vnic_dev_cmd(vdev, CMD_CLOSE, &a0, &a1, wait); 507 } 508 509 int vnic_dev_enable_wait(struct vnic_dev *vdev) 510 { 511 u64 a0 = 0, a1 = 0; 512 int wait = 1000; 513 514 if (vnic_dev_capable(vdev, CMD_ENABLE_WAIT)) 515 return vnic_dev_cmd(vdev, CMD_ENABLE_WAIT, &a0, &a1, wait); 516 else 517 return vnic_dev_cmd(vdev, CMD_ENABLE, &a0, &a1, wait); 518 } 519 520 int vnic_dev_disable(struct vnic_dev *vdev) 521 { 522 u64 a0 = 0, a1 = 0; 523 int wait = 1000; 524 return vnic_dev_cmd(vdev, CMD_DISABLE, &a0, &a1, wait); 525 } 526 527 int vnic_dev_open(struct vnic_dev *vdev, int arg) 528 { 529 u64 a0 = (u32)arg, a1 = 0; 530 int wait = 1000; 531 return vnic_dev_cmd(vdev, CMD_OPEN, &a0, &a1, wait); 532 } 533 534 int vnic_dev_open_done(struct vnic_dev *vdev, int *done) 535 { 536 u64 a0 = 0, a1 = 0; 537 int wait = 1000; 538 int err; 539 540 *done = 0; 541 542 err = vnic_dev_cmd(vdev, CMD_OPEN_STATUS, &a0, &a1, wait); 543 if (err) 544 return err; 545 546 *done = (a0 == 0); 547 548 return 0; 549 } 550 551 static int vnic_dev_soft_reset(struct vnic_dev *vdev, int arg) 552 { 553 u64 a0 = (u32)arg, a1 = 0; 554 int wait = 1000; 555 return vnic_dev_cmd(vdev, CMD_SOFT_RESET, &a0, &a1, wait); 556 } 557 558 static int vnic_dev_soft_reset_done(struct vnic_dev *vdev, int *done) 559 { 560 u64 a0 = 0, a1 = 0; 561 int wait = 1000; 562 int err; 563 564 *done = 0; 565 566 err = vnic_dev_cmd(vdev, CMD_SOFT_RESET_STATUS, &a0, &a1, wait); 567 if (err) 568 return err; 569 570 *done = (a0 == 0); 571 572 return 0; 573 } 574 575 int vnic_dev_hang_reset(struct vnic_dev *vdev, int arg) 576 { 577 u64 a0 = (u32)arg, a1 = 0; 578 int wait = 1000; 579 int err; 580 581 if (vnic_dev_capable(vdev, CMD_HANG_RESET)) { 582 return vnic_dev_cmd(vdev, CMD_HANG_RESET, 583 &a0, &a1, wait); 584 } else { 585 err = vnic_dev_soft_reset(vdev, arg); 586 if (err) 587 return err; 588 return vnic_dev_init(vdev, 0); 589 } 590 } 591 592 int vnic_dev_hang_reset_done(struct vnic_dev *vdev, int *done) 593 { 594 u64 a0 = 0, a1 = 0; 595 int wait = 1000; 596 int err; 597 598 *done = 0; 599 600 if (vnic_dev_capable(vdev, CMD_HANG_RESET_STATUS)) { 601 err = vnic_dev_cmd(vdev, CMD_HANG_RESET_STATUS, 602 &a0, &a1, wait); 603 if (err) 604 return err; 605 } else { 606 return vnic_dev_soft_reset_done(vdev, done); 607 } 608 609 *done = (a0 == 0); 610 611 return 0; 612 } 613 614 int vnic_dev_hang_notify(struct vnic_dev *vdev) 615 { 616 u64 a0, a1; 617 int wait = 1000; 618 return vnic_dev_cmd(vdev, CMD_HANG_NOTIFY, &a0, &a1, wait); 619 } 620 621 int vnic_dev_get_mac_addr(struct vnic_dev *vdev, u8 *mac_addr) 622 { 623 u64 a0, a1; 624 int wait = 1000; 625 int err, i; 626 627 for (i = 0; i < ETH_ALEN; i++) 628 mac_addr[i] = 0; 629 630 err = vnic_dev_cmd(vdev, CMD_GET_MAC_ADDR, &a0, &a1, wait); 631 if (err) 632 return err; 633 634 for (i = 0; i < ETH_ALEN; i++) 635 mac_addr[i] = ((u8 *)&a0)[i]; 636 637 return 0; 638 } 639 640 int vnic_dev_packet_filter(struct vnic_dev *vdev, int directed, int multicast, 641 int broadcast, int promisc, int allmulti) 642 { 643 u64 a0, a1 = 0; 644 int wait = 1000; 645 int err; 646 647 a0 = (directed ? CMD_PFILTER_DIRECTED : 0) | 648 (multicast ? CMD_PFILTER_MULTICAST : 0) | 649 (broadcast ? CMD_PFILTER_BROADCAST : 0) | 650 (promisc ? CMD_PFILTER_PROMISCUOUS : 0) | 651 (allmulti ? CMD_PFILTER_ALL_MULTICAST : 0); 652 653 err = vnic_dev_cmd(vdev, CMD_PACKET_FILTER, &a0, &a1, wait); 654 if (err) 655 pr_err("Can't set packet filter\n"); 656 657 return err; 658 } 659 660 int vnic_dev_add_addr(struct vnic_dev *vdev, u8 *addr) 661 { 662 u64 a0 = 0, a1 = 0; 663 int wait = 1000; 664 int err; 665 int i; 666 667 for (i = 0; i < ETH_ALEN; i++) 668 ((u8 *)&a0)[i] = addr[i]; 669 670 err = vnic_dev_cmd(vdev, CMD_ADDR_ADD, &a0, &a1, wait); 671 if (err) 672 pr_err("Can't add addr [%pM], %d\n", addr, err); 673 674 return err; 675 } 676 677 int vnic_dev_del_addr(struct vnic_dev *vdev, u8 *addr) 678 { 679 u64 a0 = 0, a1 = 0; 680 int wait = 1000; 681 int err; 682 int i; 683 684 for (i = 0; i < ETH_ALEN; i++) 685 ((u8 *)&a0)[i] = addr[i]; 686 687 err = vnic_dev_cmd(vdev, CMD_ADDR_DEL, &a0, &a1, wait); 688 if (err) 689 pr_err("Can't del addr [%pM], %d\n", addr, err); 690 691 return err; 692 } 693 694 int vnic_dev_set_ig_vlan_rewrite_mode(struct vnic_dev *vdev, 695 u8 ig_vlan_rewrite_mode) 696 { 697 u64 a0 = ig_vlan_rewrite_mode, a1 = 0; 698 int wait = 1000; 699 700 if (vnic_dev_capable(vdev, CMD_IG_VLAN_REWRITE_MODE)) 701 return vnic_dev_cmd(vdev, CMD_IG_VLAN_REWRITE_MODE, 702 &a0, &a1, wait); 703 else 704 return 0; 705 } 706 707 static int vnic_dev_notify_setcmd(struct vnic_dev *vdev, 708 void *notify_addr, dma_addr_t notify_pa, u16 intr) 709 { 710 u64 a0, a1; 711 int wait = 1000; 712 int r; 713 714 memset(notify_addr, 0, sizeof(struct vnic_devcmd_notify)); 715 vdev->notify = notify_addr; 716 vdev->notify_pa = notify_pa; 717 718 a0 = (u64)notify_pa; 719 a1 = ((u64)intr << 32) & 0x0000ffff00000000ULL; 720 a1 += sizeof(struct vnic_devcmd_notify); 721 722 r = vnic_dev_cmd(vdev, CMD_NOTIFY, &a0, &a1, wait); 723 vdev->notify_sz = (r == 0) ? (u32)a1 : 0; 724 return r; 725 } 726 727 int vnic_dev_notify_set(struct vnic_dev *vdev, u16 intr) 728 { 729 void *notify_addr; 730 dma_addr_t notify_pa; 731 732 if (vdev->notify || vdev->notify_pa) { 733 pr_err("notify block %p still allocated", vdev->notify); 734 return -EINVAL; 735 } 736 737 notify_addr = pci_alloc_consistent(vdev->pdev, 738 sizeof(struct vnic_devcmd_notify), 739 ¬ify_pa); 740 if (!notify_addr) 741 return -ENOMEM; 742 743 return vnic_dev_notify_setcmd(vdev, notify_addr, notify_pa, intr); 744 } 745 746 static int vnic_dev_notify_unsetcmd(struct vnic_dev *vdev) 747 { 748 u64 a0, a1; 749 int wait = 1000; 750 int err; 751 752 a0 = 0; /* paddr = 0 to unset notify buffer */ 753 a1 = 0x0000ffff00000000ULL; /* intr num = -1 to unreg for intr */ 754 a1 += sizeof(struct vnic_devcmd_notify); 755 756 err = vnic_dev_cmd(vdev, CMD_NOTIFY, &a0, &a1, wait); 757 vdev->notify = NULL; 758 vdev->notify_pa = 0; 759 vdev->notify_sz = 0; 760 761 return err; 762 } 763 764 int vnic_dev_notify_unset(struct vnic_dev *vdev) 765 { 766 if (vdev->notify) { 767 pci_free_consistent(vdev->pdev, 768 sizeof(struct vnic_devcmd_notify), 769 vdev->notify, 770 vdev->notify_pa); 771 } 772 773 return vnic_dev_notify_unsetcmd(vdev); 774 } 775 776 static int vnic_dev_notify_ready(struct vnic_dev *vdev) 777 { 778 u32 *words; 779 unsigned int nwords = vdev->notify_sz / 4; 780 unsigned int i; 781 u32 csum; 782 783 if (!vdev->notify || !vdev->notify_sz) 784 return 0; 785 786 do { 787 csum = 0; 788 memcpy(&vdev->notify_copy, vdev->notify, vdev->notify_sz); 789 words = (u32 *)&vdev->notify_copy; 790 for (i = 1; i < nwords; i++) 791 csum += words[i]; 792 } while (csum != words[0]); 793 794 return 1; 795 } 796 797 int vnic_dev_init(struct vnic_dev *vdev, int arg) 798 { 799 u64 a0 = (u32)arg, a1 = 0; 800 int wait = 1000; 801 int r = 0; 802 803 if (vnic_dev_capable(vdev, CMD_INIT)) 804 r = vnic_dev_cmd(vdev, CMD_INIT, &a0, &a1, wait); 805 else { 806 vnic_dev_cmd(vdev, CMD_INIT_v1, &a0, &a1, wait); 807 if (a0 & CMD_INITF_DEFAULT_MAC) { 808 /* Emulate these for old CMD_INIT_v1 which 809 * didn't pass a0 so no CMD_INITF_*. 810 */ 811 vnic_dev_cmd(vdev, CMD_GET_MAC_ADDR, &a0, &a1, wait); 812 vnic_dev_cmd(vdev, CMD_ADDR_ADD, &a0, &a1, wait); 813 } 814 } 815 return r; 816 } 817 818 int vnic_dev_deinit(struct vnic_dev *vdev) 819 { 820 u64 a0 = 0, a1 = 0; 821 int wait = 1000; 822 823 return vnic_dev_cmd(vdev, CMD_DEINIT, &a0, &a1, wait); 824 } 825 826 void vnic_dev_intr_coal_timer_info_default(struct vnic_dev *vdev) 827 { 828 /* Default: hardware intr coal timer is in units of 1.5 usecs */ 829 vdev->intr_coal_timer_info.mul = 2; 830 vdev->intr_coal_timer_info.div = 3; 831 vdev->intr_coal_timer_info.max_usec = 832 vnic_dev_intr_coal_timer_hw_to_usec(vdev, 0xffff); 833 } 834 835 int vnic_dev_intr_coal_timer_info(struct vnic_dev *vdev) 836 { 837 int wait = 1000; 838 int err; 839 840 memset(vdev->args, 0, sizeof(vdev->args)); 841 842 if (vnic_dev_capable(vdev, CMD_INTR_COAL_CONVERT)) 843 err = _vnic_dev_cmd(vdev, CMD_INTR_COAL_CONVERT, wait); 844 else 845 err = ERR_ECMDUNKNOWN; 846 847 /* Use defaults when firmware doesn't support the devcmd at all or 848 * supports it for only specific hardware 849 */ 850 if ((err == ERR_ECMDUNKNOWN) || 851 (!err && !(vdev->args[0] && vdev->args[1] && vdev->args[2]))) { 852 pr_warning("Using default conversion factor for " 853 "interrupt coalesce timer\n"); 854 vnic_dev_intr_coal_timer_info_default(vdev); 855 return 0; 856 } 857 858 if (!err) { 859 vdev->intr_coal_timer_info.mul = (u32) vdev->args[0]; 860 vdev->intr_coal_timer_info.div = (u32) vdev->args[1]; 861 vdev->intr_coal_timer_info.max_usec = (u32) vdev->args[2]; 862 } 863 864 return err; 865 } 866 867 int vnic_dev_link_status(struct vnic_dev *vdev) 868 { 869 if (!vnic_dev_notify_ready(vdev)) 870 return 0; 871 872 return vdev->notify_copy.link_state; 873 } 874 875 u32 vnic_dev_port_speed(struct vnic_dev *vdev) 876 { 877 if (!vnic_dev_notify_ready(vdev)) 878 return 0; 879 880 return vdev->notify_copy.port_speed; 881 } 882 883 u32 vnic_dev_msg_lvl(struct vnic_dev *vdev) 884 { 885 if (!vnic_dev_notify_ready(vdev)) 886 return 0; 887 888 return vdev->notify_copy.msglvl; 889 } 890 891 u32 vnic_dev_mtu(struct vnic_dev *vdev) 892 { 893 if (!vnic_dev_notify_ready(vdev)) 894 return 0; 895 896 return vdev->notify_copy.mtu; 897 } 898 899 void vnic_dev_set_intr_mode(struct vnic_dev *vdev, 900 enum vnic_dev_intr_mode intr_mode) 901 { 902 vdev->intr_mode = intr_mode; 903 } 904 905 enum vnic_dev_intr_mode vnic_dev_get_intr_mode( 906 struct vnic_dev *vdev) 907 { 908 return vdev->intr_mode; 909 } 910 911 u32 vnic_dev_intr_coal_timer_usec_to_hw(struct vnic_dev *vdev, u32 usec) 912 { 913 return (usec * vdev->intr_coal_timer_info.mul) / 914 vdev->intr_coal_timer_info.div; 915 } 916 917 u32 vnic_dev_intr_coal_timer_hw_to_usec(struct vnic_dev *vdev, u32 hw_cycles) 918 { 919 return (hw_cycles * vdev->intr_coal_timer_info.div) / 920 vdev->intr_coal_timer_info.mul; 921 } 922 923 u32 vnic_dev_get_intr_coal_timer_max(struct vnic_dev *vdev) 924 { 925 return vdev->intr_coal_timer_info.max_usec; 926 } 927 928 void vnic_dev_unregister(struct vnic_dev *vdev) 929 { 930 if (vdev) { 931 if (vdev->notify) 932 pci_free_consistent(vdev->pdev, 933 sizeof(struct vnic_devcmd_notify), 934 vdev->notify, 935 vdev->notify_pa); 936 if (vdev->stats) 937 pci_free_consistent(vdev->pdev, 938 sizeof(struct vnic_stats), 939 vdev->stats, vdev->stats_pa); 940 if (vdev->fw_info) 941 pci_free_consistent(vdev->pdev, 942 sizeof(struct vnic_devcmd_fw_info), 943 vdev->fw_info, vdev->fw_info_pa); 944 kfree(vdev); 945 } 946 } 947 EXPORT_SYMBOL(vnic_dev_unregister); 948 949 struct vnic_dev *vnic_dev_register(struct vnic_dev *vdev, 950 void *priv, struct pci_dev *pdev, struct vnic_dev_bar *bar, 951 unsigned int num_bars) 952 { 953 if (!vdev) { 954 vdev = kzalloc(sizeof(struct vnic_dev), GFP_ATOMIC); 955 if (!vdev) 956 return NULL; 957 } 958 959 vdev->priv = priv; 960 vdev->pdev = pdev; 961 962 if (vnic_dev_discover_res(vdev, bar, num_bars)) 963 goto err_out; 964 965 vdev->devcmd = vnic_dev_get_res(vdev, RES_TYPE_DEVCMD, 0); 966 if (!vdev->devcmd) 967 goto err_out; 968 969 return vdev; 970 971 err_out: 972 vnic_dev_unregister(vdev); 973 return NULL; 974 } 975 EXPORT_SYMBOL(vnic_dev_register); 976 977 struct pci_dev *vnic_dev_get_pdev(struct vnic_dev *vdev) 978 { 979 return vdev->pdev; 980 } 981 EXPORT_SYMBOL(vnic_dev_get_pdev); 982 983 int vnic_dev_init_prov2(struct vnic_dev *vdev, u8 *buf, u32 len) 984 { 985 u64 a0, a1 = len; 986 int wait = 1000; 987 dma_addr_t prov_pa; 988 void *prov_buf; 989 int ret; 990 991 prov_buf = pci_alloc_consistent(vdev->pdev, len, &prov_pa); 992 if (!prov_buf) 993 return -ENOMEM; 994 995 memcpy(prov_buf, buf, len); 996 997 a0 = prov_pa; 998 999 ret = vnic_dev_cmd(vdev, CMD_INIT_PROV_INFO2, &a0, &a1, wait); 1000 1001 pci_free_consistent(vdev->pdev, len, prov_buf, prov_pa); 1002 1003 return ret; 1004 } 1005 1006 int vnic_dev_enable2(struct vnic_dev *vdev, int active) 1007 { 1008 u64 a0, a1 = 0; 1009 int wait = 1000; 1010 1011 a0 = (active ? CMD_ENABLE2_ACTIVE : 0); 1012 1013 return vnic_dev_cmd(vdev, CMD_ENABLE2, &a0, &a1, wait); 1014 } 1015 1016 static int vnic_dev_cmd_status(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd, 1017 int *status) 1018 { 1019 u64 a0 = cmd, a1 = 0; 1020 int wait = 1000; 1021 int ret; 1022 1023 ret = vnic_dev_cmd(vdev, CMD_STATUS, &a0, &a1, wait); 1024 if (!ret) 1025 *status = (int)a0; 1026 1027 return ret; 1028 } 1029 1030 int vnic_dev_enable2_done(struct vnic_dev *vdev, int *status) 1031 { 1032 return vnic_dev_cmd_status(vdev, CMD_ENABLE2, status); 1033 } 1034 1035 int vnic_dev_deinit_done(struct vnic_dev *vdev, int *status) 1036 { 1037 return vnic_dev_cmd_status(vdev, CMD_DEINIT, status); 1038 } 1039 1040 int vnic_dev_set_mac_addr(struct vnic_dev *vdev, u8 *mac_addr) 1041 { 1042 u64 a0, a1; 1043 int wait = 1000; 1044 int i; 1045 1046 for (i = 0; i < ETH_ALEN; i++) 1047 ((u8 *)&a0)[i] = mac_addr[i]; 1048 1049 return vnic_dev_cmd(vdev, CMD_SET_MAC_ADDR, &a0, &a1, wait); 1050 } 1051