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 31 struct vnic_res { 32 void __iomem *vaddr; 33 unsigned int count; 34 }; 35 36 struct vnic_dev { 37 void *priv; 38 struct pci_dev *pdev; 39 struct vnic_res res[RES_TYPE_MAX]; 40 enum vnic_dev_intr_mode intr_mode; 41 struct vnic_devcmd __iomem *devcmd; 42 struct vnic_devcmd_notify *notify; 43 struct vnic_devcmd_notify notify_copy; 44 dma_addr_t notify_pa; 45 u32 *linkstatus; 46 dma_addr_t linkstatus_pa; 47 struct vnic_stats *stats; 48 dma_addr_t stats_pa; 49 struct vnic_devcmd_fw_info *fw_info; 50 dma_addr_t fw_info_pa; 51 }; 52 53 #define VNIC_MAX_RES_HDR_SIZE \ 54 (sizeof(struct vnic_resource_header) + \ 55 sizeof(struct vnic_resource) * RES_TYPE_MAX) 56 #define VNIC_RES_STRIDE 128 57 58 void *vnic_dev_priv(struct vnic_dev *vdev) 59 { 60 return vdev->priv; 61 } 62 63 static int vnic_dev_discover_res(struct vnic_dev *vdev, 64 struct vnic_dev_bar *bar) 65 { 66 struct vnic_resource_header __iomem *rh; 67 struct vnic_resource __iomem *r; 68 u8 type; 69 70 if (bar->len < VNIC_MAX_RES_HDR_SIZE) { 71 printk(KERN_ERR "vNIC BAR0 res hdr length error\n"); 72 return -EINVAL; 73 } 74 75 rh = bar->vaddr; 76 if (!rh) { 77 printk(KERN_ERR "vNIC BAR0 res hdr not mem-mapped\n"); 78 return -EINVAL; 79 } 80 81 if (ioread32(&rh->magic) != VNIC_RES_MAGIC || 82 ioread32(&rh->version) != VNIC_RES_VERSION) { 83 printk(KERN_ERR "vNIC BAR0 res magic/version error " 84 "exp (%lx/%lx) curr (%x/%x)\n", 85 VNIC_RES_MAGIC, VNIC_RES_VERSION, 86 ioread32(&rh->magic), ioread32(&rh->version)); 87 return -EINVAL; 88 } 89 90 r = (struct vnic_resource __iomem *)(rh + 1); 91 92 while ((type = ioread8(&r->type)) != RES_TYPE_EOL) { 93 94 u8 bar_num = ioread8(&r->bar); 95 u32 bar_offset = ioread32(&r->bar_offset); 96 u32 count = ioread32(&r->count); 97 u32 len; 98 99 r++; 100 101 if (bar_num != 0) /* only mapping in BAR0 resources */ 102 continue; 103 104 switch (type) { 105 case RES_TYPE_WQ: 106 case RES_TYPE_RQ: 107 case RES_TYPE_CQ: 108 case RES_TYPE_INTR_CTRL: 109 /* each count is stride bytes long */ 110 len = count * VNIC_RES_STRIDE; 111 if (len + bar_offset > bar->len) { 112 printk(KERN_ERR "vNIC BAR0 resource %d " 113 "out-of-bounds, offset 0x%x + " 114 "size 0x%x > bar len 0x%lx\n", 115 type, bar_offset, 116 len, 117 bar->len); 118 return -EINVAL; 119 } 120 break; 121 case RES_TYPE_INTR_PBA_LEGACY: 122 case RES_TYPE_DEVCMD: 123 len = count; 124 break; 125 default: 126 continue; 127 } 128 129 vdev->res[type].count = count; 130 vdev->res[type].vaddr = (char __iomem *)bar->vaddr + bar_offset; 131 } 132 133 return 0; 134 } 135 136 unsigned int vnic_dev_get_res_count(struct vnic_dev *vdev, 137 enum vnic_res_type type) 138 { 139 return vdev->res[type].count; 140 } 141 142 void __iomem *vnic_dev_get_res(struct vnic_dev *vdev, enum vnic_res_type type, 143 unsigned int index) 144 { 145 if (!vdev->res[type].vaddr) 146 return NULL; 147 148 switch (type) { 149 case RES_TYPE_WQ: 150 case RES_TYPE_RQ: 151 case RES_TYPE_CQ: 152 case RES_TYPE_INTR_CTRL: 153 return (char __iomem *)vdev->res[type].vaddr + 154 index * VNIC_RES_STRIDE; 155 default: 156 return (char __iomem *)vdev->res[type].vaddr; 157 } 158 } 159 160 unsigned int vnic_dev_desc_ring_size(struct vnic_dev_ring *ring, 161 unsigned int desc_count, 162 unsigned int desc_size) 163 { 164 /* The base address of the desc rings must be 512 byte aligned. 165 * Descriptor count is aligned to groups of 32 descriptors. A 166 * count of 0 means the maximum 4096 descriptors. Descriptor 167 * size is aligned to 16 bytes. 168 */ 169 170 unsigned int count_align = 32; 171 unsigned int desc_align = 16; 172 173 ring->base_align = 512; 174 175 if (desc_count == 0) 176 desc_count = 4096; 177 178 ring->desc_count = ALIGN(desc_count, count_align); 179 180 ring->desc_size = ALIGN(desc_size, desc_align); 181 182 ring->size = ring->desc_count * ring->desc_size; 183 ring->size_unaligned = ring->size + ring->base_align; 184 185 return ring->size_unaligned; 186 } 187 188 void vnic_dev_clear_desc_ring(struct vnic_dev_ring *ring) 189 { 190 memset(ring->descs, 0, ring->size); 191 } 192 193 int vnic_dev_alloc_desc_ring(struct vnic_dev *vdev, struct vnic_dev_ring *ring, 194 unsigned int desc_count, unsigned int desc_size) 195 { 196 vnic_dev_desc_ring_size(ring, desc_count, desc_size); 197 198 ring->descs_unaligned = pci_alloc_consistent(vdev->pdev, 199 ring->size_unaligned, 200 &ring->base_addr_unaligned); 201 202 if (!ring->descs_unaligned) { 203 printk(KERN_ERR 204 "Failed to allocate ring (size=%d), aborting\n", 205 (int)ring->size); 206 return -ENOMEM; 207 } 208 209 ring->base_addr = ALIGN(ring->base_addr_unaligned, 210 ring->base_align); 211 ring->descs = (u8 *)ring->descs_unaligned + 212 (ring->base_addr - ring->base_addr_unaligned); 213 214 vnic_dev_clear_desc_ring(ring); 215 216 ring->desc_avail = ring->desc_count - 1; 217 218 return 0; 219 } 220 221 void vnic_dev_free_desc_ring(struct vnic_dev *vdev, struct vnic_dev_ring *ring) 222 { 223 if (ring->descs) { 224 pci_free_consistent(vdev->pdev, 225 ring->size_unaligned, 226 ring->descs_unaligned, 227 ring->base_addr_unaligned); 228 ring->descs = NULL; 229 } 230 } 231 232 int vnic_dev_cmd(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd, 233 u64 *a0, u64 *a1, int wait) 234 { 235 struct vnic_devcmd __iomem *devcmd = vdev->devcmd; 236 int delay; 237 u32 status; 238 int dev_cmd_err[] = { 239 /* convert from fw's version of error.h to host's version */ 240 0, /* ERR_SUCCESS */ 241 EINVAL, /* ERR_EINVAL */ 242 EFAULT, /* ERR_EFAULT */ 243 EPERM, /* ERR_EPERM */ 244 EBUSY, /* ERR_EBUSY */ 245 }; 246 int err; 247 248 status = ioread32(&devcmd->status); 249 if (status & STAT_BUSY) { 250 printk(KERN_ERR "Busy devcmd %d\n", _CMD_N(cmd)); 251 return -EBUSY; 252 } 253 254 if (_CMD_DIR(cmd) & _CMD_DIR_WRITE) { 255 writeq(*a0, &devcmd->args[0]); 256 writeq(*a1, &devcmd->args[1]); 257 wmb(); 258 } 259 260 iowrite32(cmd, &devcmd->cmd); 261 262 if ((_CMD_FLAGS(cmd) & _CMD_FLAGS_NOWAIT)) 263 return 0; 264 265 for (delay = 0; delay < wait; delay++) { 266 267 udelay(100); 268 269 status = ioread32(&devcmd->status); 270 if (!(status & STAT_BUSY)) { 271 272 if (status & STAT_ERROR) { 273 err = dev_cmd_err[(int)readq(&devcmd->args[0])]; 274 printk(KERN_ERR "Error %d devcmd %d\n", 275 err, _CMD_N(cmd)); 276 return -err; 277 } 278 279 if (_CMD_DIR(cmd) & _CMD_DIR_READ) { 280 rmb(); 281 *a0 = readq(&devcmd->args[0]); 282 *a1 = readq(&devcmd->args[1]); 283 } 284 285 return 0; 286 } 287 } 288 289 printk(KERN_ERR "Timedout devcmd %d\n", _CMD_N(cmd)); 290 return -ETIMEDOUT; 291 } 292 293 int vnic_dev_fw_info(struct vnic_dev *vdev, 294 struct vnic_devcmd_fw_info **fw_info) 295 { 296 u64 a0, a1 = 0; 297 int wait = 1000; 298 int err = 0; 299 300 if (!vdev->fw_info) { 301 vdev->fw_info = pci_alloc_consistent(vdev->pdev, 302 sizeof(struct vnic_devcmd_fw_info), 303 &vdev->fw_info_pa); 304 if (!vdev->fw_info) 305 return -ENOMEM; 306 307 a0 = vdev->fw_info_pa; 308 309 /* only get fw_info once and cache it */ 310 err = vnic_dev_cmd(vdev, CMD_MCPU_FW_INFO, &a0, &a1, wait); 311 } 312 313 *fw_info = vdev->fw_info; 314 315 return err; 316 } 317 318 int vnic_dev_spec(struct vnic_dev *vdev, unsigned int offset, unsigned int size, 319 void *value) 320 { 321 u64 a0, a1; 322 int wait = 1000; 323 int err; 324 325 a0 = offset; 326 a1 = size; 327 328 err = vnic_dev_cmd(vdev, CMD_DEV_SPEC, &a0, &a1, wait); 329 330 switch (size) { 331 case 1: 332 *(u8 *)value = (u8)a0; 333 break; 334 case 2: 335 *(u16 *)value = (u16)a0; 336 break; 337 case 4: 338 *(u32 *)value = (u32)a0; 339 break; 340 case 8: 341 *(u64 *)value = a0; 342 break; 343 default: 344 BUG(); 345 break; 346 } 347 348 return err; 349 } 350 351 int vnic_dev_stats_clear(struct vnic_dev *vdev) 352 { 353 u64 a0 = 0, a1 = 0; 354 int wait = 1000; 355 return vnic_dev_cmd(vdev, CMD_STATS_CLEAR, &a0, &a1, wait); 356 } 357 358 int vnic_dev_stats_dump(struct vnic_dev *vdev, struct vnic_stats **stats) 359 { 360 u64 a0, a1; 361 int wait = 1000; 362 363 if (!vdev->stats) { 364 vdev->stats = pci_alloc_consistent(vdev->pdev, 365 sizeof(struct vnic_stats), &vdev->stats_pa); 366 if (!vdev->stats) 367 return -ENOMEM; 368 } 369 370 *stats = vdev->stats; 371 a0 = vdev->stats_pa; 372 a1 = sizeof(struct vnic_stats); 373 374 return vnic_dev_cmd(vdev, CMD_STATS_DUMP, &a0, &a1, wait); 375 } 376 377 int vnic_dev_close(struct vnic_dev *vdev) 378 { 379 u64 a0 = 0, a1 = 0; 380 int wait = 1000; 381 return vnic_dev_cmd(vdev, CMD_CLOSE, &a0, &a1, wait); 382 } 383 384 int vnic_dev_enable(struct vnic_dev *vdev) 385 { 386 u64 a0 = 0, a1 = 0; 387 int wait = 1000; 388 return vnic_dev_cmd(vdev, CMD_ENABLE, &a0, &a1, wait); 389 } 390 391 int vnic_dev_disable(struct vnic_dev *vdev) 392 { 393 u64 a0 = 0, a1 = 0; 394 int wait = 1000; 395 return vnic_dev_cmd(vdev, CMD_DISABLE, &a0, &a1, wait); 396 } 397 398 int vnic_dev_open(struct vnic_dev *vdev, int arg) 399 { 400 u64 a0 = (u32)arg, a1 = 0; 401 int wait = 1000; 402 return vnic_dev_cmd(vdev, CMD_OPEN, &a0, &a1, wait); 403 } 404 405 int vnic_dev_open_done(struct vnic_dev *vdev, int *done) 406 { 407 u64 a0 = 0, a1 = 0; 408 int wait = 1000; 409 int err; 410 411 *done = 0; 412 413 err = vnic_dev_cmd(vdev, CMD_OPEN_STATUS, &a0, &a1, wait); 414 if (err) 415 return err; 416 417 *done = (a0 == 0); 418 419 return 0; 420 } 421 422 int vnic_dev_soft_reset(struct vnic_dev *vdev, int arg) 423 { 424 u64 a0 = (u32)arg, a1 = 0; 425 int wait = 1000; 426 return vnic_dev_cmd(vdev, CMD_SOFT_RESET, &a0, &a1, wait); 427 } 428 429 int vnic_dev_soft_reset_done(struct vnic_dev *vdev, int *done) 430 { 431 u64 a0 = 0, a1 = 0; 432 int wait = 1000; 433 int err; 434 435 *done = 0; 436 437 err = vnic_dev_cmd(vdev, CMD_SOFT_RESET_STATUS, &a0, &a1, wait); 438 if (err) 439 return err; 440 441 *done = (a0 == 0); 442 443 return 0; 444 } 445 446 int vnic_dev_hang_notify(struct vnic_dev *vdev) 447 { 448 u64 a0, a1; 449 int wait = 1000; 450 return vnic_dev_cmd(vdev, CMD_HANG_NOTIFY, &a0, &a1, wait); 451 } 452 453 int vnic_dev_mac_addr(struct vnic_dev *vdev, u8 *mac_addr) 454 { 455 u64 a0, a1; 456 int wait = 1000; 457 int err, i; 458 459 for (i = 0; i < ETH_ALEN; i++) 460 mac_addr[i] = 0; 461 462 err = vnic_dev_cmd(vdev, CMD_MAC_ADDR, &a0, &a1, wait); 463 if (err) 464 return err; 465 466 for (i = 0; i < ETH_ALEN; i++) 467 mac_addr[i] = ((u8 *)&a0)[i]; 468 469 return 0; 470 } 471 472 void vnic_dev_packet_filter(struct vnic_dev *vdev, int directed, int multicast, 473 int broadcast, int promisc, int allmulti) 474 { 475 u64 a0, a1 = 0; 476 int wait = 1000; 477 int err; 478 479 a0 = (directed ? CMD_PFILTER_DIRECTED : 0) | 480 (multicast ? CMD_PFILTER_MULTICAST : 0) | 481 (broadcast ? CMD_PFILTER_BROADCAST : 0) | 482 (promisc ? CMD_PFILTER_PROMISCUOUS : 0) | 483 (allmulti ? CMD_PFILTER_ALL_MULTICAST : 0); 484 485 err = vnic_dev_cmd(vdev, CMD_PACKET_FILTER, &a0, &a1, wait); 486 if (err) 487 printk(KERN_ERR "Can't set packet filter\n"); 488 } 489 490 void vnic_dev_add_addr(struct vnic_dev *vdev, u8 *addr) 491 { 492 u64 a0 = 0, a1 = 0; 493 int wait = 1000; 494 int err; 495 int i; 496 497 for (i = 0; i < ETH_ALEN; i++) 498 ((u8 *)&a0)[i] = addr[i]; 499 500 err = vnic_dev_cmd(vdev, CMD_ADDR_ADD, &a0, &a1, wait); 501 if (err) 502 printk(KERN_ERR 503 "Can't add addr [%02x:%02x:%02x:%02x:%02x:%02x], %d\n", 504 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5], 505 err); 506 } 507 508 void vnic_dev_del_addr(struct vnic_dev *vdev, u8 *addr) 509 { 510 u64 a0 = 0, a1 = 0; 511 int wait = 1000; 512 int err; 513 int i; 514 515 for (i = 0; i < ETH_ALEN; i++) 516 ((u8 *)&a0)[i] = addr[i]; 517 518 err = vnic_dev_cmd(vdev, CMD_ADDR_DEL, &a0, &a1, wait); 519 if (err) 520 printk(KERN_ERR 521 "Can't del addr [%02x:%02x:%02x:%02x:%02x:%02x], %d\n", 522 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5], 523 err); 524 } 525 526 int vnic_dev_notify_set(struct vnic_dev *vdev, u16 intr) 527 { 528 u64 a0, a1; 529 int wait = 1000; 530 531 if (!vdev->notify) { 532 vdev->notify = pci_alloc_consistent(vdev->pdev, 533 sizeof(struct vnic_devcmd_notify), 534 &vdev->notify_pa); 535 if (!vdev->notify) 536 return -ENOMEM; 537 } 538 539 a0 = vdev->notify_pa; 540 a1 = ((u64)intr << 32) & 0x0000ffff00000000ULL; 541 a1 += sizeof(struct vnic_devcmd_notify); 542 543 return vnic_dev_cmd(vdev, CMD_NOTIFY, &a0, &a1, wait); 544 } 545 546 void vnic_dev_notify_unset(struct vnic_dev *vdev) 547 { 548 u64 a0, a1; 549 int wait = 1000; 550 551 a0 = 0; /* paddr = 0 to unset notify buffer */ 552 a1 = 0x0000ffff00000000ULL; /* intr num = -1 to unreg for intr */ 553 a1 += sizeof(struct vnic_devcmd_notify); 554 555 vnic_dev_cmd(vdev, CMD_NOTIFY, &a0, &a1, wait); 556 } 557 558 static int vnic_dev_notify_ready(struct vnic_dev *vdev) 559 { 560 u32 *words; 561 unsigned int nwords = sizeof(struct vnic_devcmd_notify) / 4; 562 unsigned int i; 563 u32 csum; 564 565 if (!vdev->notify) 566 return 0; 567 568 do { 569 csum = 0; 570 memcpy(&vdev->notify_copy, vdev->notify, 571 sizeof(struct vnic_devcmd_notify)); 572 words = (u32 *)&vdev->notify_copy; 573 for (i = 1; i < nwords; i++) 574 csum += words[i]; 575 } while (csum != words[0]); 576 577 return 1; 578 } 579 580 int vnic_dev_init(struct vnic_dev *vdev, int arg) 581 { 582 u64 a0 = (u32)arg, a1 = 0; 583 int wait = 1000; 584 return vnic_dev_cmd(vdev, CMD_INIT, &a0, &a1, wait); 585 } 586 587 int vnic_dev_link_status(struct vnic_dev *vdev) 588 { 589 if (vdev->linkstatus) 590 return *vdev->linkstatus; 591 592 if (!vnic_dev_notify_ready(vdev)) 593 return 0; 594 595 return vdev->notify_copy.link_state; 596 } 597 598 u32 vnic_dev_port_speed(struct vnic_dev *vdev) 599 { 600 if (!vnic_dev_notify_ready(vdev)) 601 return 0; 602 603 return vdev->notify_copy.port_speed; 604 } 605 606 u32 vnic_dev_msg_lvl(struct vnic_dev *vdev) 607 { 608 if (!vnic_dev_notify_ready(vdev)) 609 return 0; 610 611 return vdev->notify_copy.msglvl; 612 } 613 614 u32 vnic_dev_mtu(struct vnic_dev *vdev) 615 { 616 if (!vnic_dev_notify_ready(vdev)) 617 return 0; 618 619 return vdev->notify_copy.mtu; 620 } 621 622 u32 vnic_dev_link_down_cnt(struct vnic_dev *vdev) 623 { 624 if (!vnic_dev_notify_ready(vdev)) 625 return 0; 626 627 return vdev->notify_copy.link_down_cnt; 628 } 629 630 void vnic_dev_set_intr_mode(struct vnic_dev *vdev, 631 enum vnic_dev_intr_mode intr_mode) 632 { 633 vdev->intr_mode = intr_mode; 634 } 635 636 enum vnic_dev_intr_mode vnic_dev_get_intr_mode( 637 struct vnic_dev *vdev) 638 { 639 return vdev->intr_mode; 640 } 641 642 void vnic_dev_unregister(struct vnic_dev *vdev) 643 { 644 if (vdev) { 645 if (vdev->notify) 646 pci_free_consistent(vdev->pdev, 647 sizeof(struct vnic_devcmd_notify), 648 vdev->notify, 649 vdev->notify_pa); 650 if (vdev->linkstatus) 651 pci_free_consistent(vdev->pdev, 652 sizeof(u32), 653 vdev->linkstatus, 654 vdev->linkstatus_pa); 655 if (vdev->stats) 656 pci_free_consistent(vdev->pdev, 657 sizeof(struct vnic_stats), 658 vdev->stats, vdev->stats_pa); 659 if (vdev->fw_info) 660 pci_free_consistent(vdev->pdev, 661 sizeof(struct vnic_devcmd_fw_info), 662 vdev->fw_info, vdev->fw_info_pa); 663 kfree(vdev); 664 } 665 } 666 667 struct vnic_dev *vnic_dev_register(struct vnic_dev *vdev, 668 void *priv, struct pci_dev *pdev, struct vnic_dev_bar *bar) 669 { 670 if (!vdev) { 671 vdev = kzalloc(sizeof(struct vnic_dev), GFP_KERNEL); 672 if (!vdev) 673 return NULL; 674 } 675 676 vdev->priv = priv; 677 vdev->pdev = pdev; 678 679 if (vnic_dev_discover_res(vdev, bar)) 680 goto err_out; 681 682 vdev->devcmd = vnic_dev_get_res(vdev, RES_TYPE_DEVCMD, 0); 683 if (!vdev->devcmd) 684 goto err_out; 685 686 return vdev; 687 688 err_out: 689 vnic_dev_unregister(vdev); 690 return NULL; 691 } 692