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