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