1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright Gavin Shan, IBM Corporation 2016. 4 */ 5 6 #include <linux/module.h> 7 #include <linux/kernel.h> 8 #include <linux/init.h> 9 #include <linux/netdevice.h> 10 #include <linux/skbuff.h> 11 #include <linux/of.h> 12 #include <linux/platform_device.h> 13 14 #include <net/ncsi.h> 15 #include <net/net_namespace.h> 16 #include <net/sock.h> 17 #include <net/addrconf.h> 18 #include <net/ipv6.h> 19 #include <net/genetlink.h> 20 21 #include "internal.h" 22 #include "ncsi-pkt.h" 23 #include "ncsi-netlink.h" 24 25 LIST_HEAD(ncsi_dev_list); 26 DEFINE_SPINLOCK(ncsi_dev_lock); 27 28 bool ncsi_channel_has_link(struct ncsi_channel *channel) 29 { 30 return !!(channel->modes[NCSI_MODE_LINK].data[2] & 0x1); 31 } 32 33 bool ncsi_channel_is_last(struct ncsi_dev_priv *ndp, 34 struct ncsi_channel *channel) 35 { 36 struct ncsi_package *np; 37 struct ncsi_channel *nc; 38 39 NCSI_FOR_EACH_PACKAGE(ndp, np) 40 NCSI_FOR_EACH_CHANNEL(np, nc) { 41 if (nc == channel) 42 continue; 43 if (nc->state == NCSI_CHANNEL_ACTIVE && 44 ncsi_channel_has_link(nc)) 45 return false; 46 } 47 48 return true; 49 } 50 51 static void ncsi_report_link(struct ncsi_dev_priv *ndp, bool force_down) 52 { 53 struct ncsi_dev *nd = &ndp->ndev; 54 struct ncsi_package *np; 55 struct ncsi_channel *nc; 56 unsigned long flags; 57 58 nd->state = ncsi_dev_state_functional; 59 if (force_down) { 60 nd->link_up = 0; 61 goto report; 62 } 63 64 nd->link_up = 0; 65 NCSI_FOR_EACH_PACKAGE(ndp, np) { 66 NCSI_FOR_EACH_CHANNEL(np, nc) { 67 spin_lock_irqsave(&nc->lock, flags); 68 69 if (!list_empty(&nc->link) || 70 nc->state != NCSI_CHANNEL_ACTIVE) { 71 spin_unlock_irqrestore(&nc->lock, flags); 72 continue; 73 } 74 75 if (ncsi_channel_has_link(nc)) { 76 spin_unlock_irqrestore(&nc->lock, flags); 77 nd->link_up = 1; 78 goto report; 79 } 80 81 spin_unlock_irqrestore(&nc->lock, flags); 82 } 83 } 84 85 report: 86 nd->handler(nd); 87 } 88 89 static void ncsi_channel_monitor(struct timer_list *t) 90 { 91 struct ncsi_channel *nc = from_timer(nc, t, monitor.timer); 92 struct ncsi_package *np = nc->package; 93 struct ncsi_dev_priv *ndp = np->ndp; 94 struct ncsi_channel_mode *ncm; 95 struct ncsi_cmd_arg nca; 96 bool enabled, chained; 97 unsigned int monitor_state; 98 unsigned long flags; 99 int state, ret; 100 101 spin_lock_irqsave(&nc->lock, flags); 102 state = nc->state; 103 chained = !list_empty(&nc->link); 104 enabled = nc->monitor.enabled; 105 monitor_state = nc->monitor.state; 106 spin_unlock_irqrestore(&nc->lock, flags); 107 108 if (!enabled) 109 return; /* expected race disabling timer */ 110 if (WARN_ON_ONCE(chained)) 111 goto bad_state; 112 113 if (state != NCSI_CHANNEL_INACTIVE && 114 state != NCSI_CHANNEL_ACTIVE) { 115 bad_state: 116 netdev_warn(ndp->ndev.dev, 117 "Bad NCSI monitor state channel %d 0x%x %s queue\n", 118 nc->id, state, chained ? "on" : "off"); 119 spin_lock_irqsave(&nc->lock, flags); 120 nc->monitor.enabled = false; 121 spin_unlock_irqrestore(&nc->lock, flags); 122 return; 123 } 124 125 switch (monitor_state) { 126 case NCSI_CHANNEL_MONITOR_START: 127 case NCSI_CHANNEL_MONITOR_RETRY: 128 nca.ndp = ndp; 129 nca.package = np->id; 130 nca.channel = nc->id; 131 nca.type = NCSI_PKT_CMD_GLS; 132 nca.req_flags = 0; 133 ret = ncsi_xmit_cmd(&nca); 134 if (ret) 135 netdev_err(ndp->ndev.dev, "Error %d sending GLS\n", 136 ret); 137 break; 138 case NCSI_CHANNEL_MONITOR_WAIT ... NCSI_CHANNEL_MONITOR_WAIT_MAX: 139 break; 140 default: 141 netdev_err(ndp->ndev.dev, "NCSI Channel %d timed out!\n", 142 nc->id); 143 ncsi_report_link(ndp, true); 144 ndp->flags |= NCSI_DEV_RESHUFFLE; 145 146 ncm = &nc->modes[NCSI_MODE_LINK]; 147 spin_lock_irqsave(&nc->lock, flags); 148 nc->monitor.enabled = false; 149 nc->state = NCSI_CHANNEL_INVISIBLE; 150 ncm->data[2] &= ~0x1; 151 spin_unlock_irqrestore(&nc->lock, flags); 152 153 spin_lock_irqsave(&ndp->lock, flags); 154 nc->state = NCSI_CHANNEL_ACTIVE; 155 list_add_tail_rcu(&nc->link, &ndp->channel_queue); 156 spin_unlock_irqrestore(&ndp->lock, flags); 157 ncsi_process_next_channel(ndp); 158 return; 159 } 160 161 spin_lock_irqsave(&nc->lock, flags); 162 nc->monitor.state++; 163 spin_unlock_irqrestore(&nc->lock, flags); 164 mod_timer(&nc->monitor.timer, jiffies + HZ); 165 } 166 167 void ncsi_start_channel_monitor(struct ncsi_channel *nc) 168 { 169 unsigned long flags; 170 171 spin_lock_irqsave(&nc->lock, flags); 172 WARN_ON_ONCE(nc->monitor.enabled); 173 nc->monitor.enabled = true; 174 nc->monitor.state = NCSI_CHANNEL_MONITOR_START; 175 spin_unlock_irqrestore(&nc->lock, flags); 176 177 mod_timer(&nc->monitor.timer, jiffies + HZ); 178 } 179 180 void ncsi_stop_channel_monitor(struct ncsi_channel *nc) 181 { 182 unsigned long flags; 183 184 spin_lock_irqsave(&nc->lock, flags); 185 if (!nc->monitor.enabled) { 186 spin_unlock_irqrestore(&nc->lock, flags); 187 return; 188 } 189 nc->monitor.enabled = false; 190 spin_unlock_irqrestore(&nc->lock, flags); 191 192 del_timer_sync(&nc->monitor.timer); 193 } 194 195 struct ncsi_channel *ncsi_find_channel(struct ncsi_package *np, 196 unsigned char id) 197 { 198 struct ncsi_channel *nc; 199 200 NCSI_FOR_EACH_CHANNEL(np, nc) { 201 if (nc->id == id) 202 return nc; 203 } 204 205 return NULL; 206 } 207 208 struct ncsi_channel *ncsi_add_channel(struct ncsi_package *np, unsigned char id) 209 { 210 struct ncsi_channel *nc, *tmp; 211 int index; 212 unsigned long flags; 213 214 nc = kzalloc(sizeof(*nc), GFP_ATOMIC); 215 if (!nc) 216 return NULL; 217 218 nc->id = id; 219 nc->package = np; 220 nc->state = NCSI_CHANNEL_INACTIVE; 221 nc->monitor.enabled = false; 222 timer_setup(&nc->monitor.timer, ncsi_channel_monitor, 0); 223 spin_lock_init(&nc->lock); 224 INIT_LIST_HEAD(&nc->link); 225 for (index = 0; index < NCSI_CAP_MAX; index++) 226 nc->caps[index].index = index; 227 for (index = 0; index < NCSI_MODE_MAX; index++) 228 nc->modes[index].index = index; 229 230 spin_lock_irqsave(&np->lock, flags); 231 tmp = ncsi_find_channel(np, id); 232 if (tmp) { 233 spin_unlock_irqrestore(&np->lock, flags); 234 kfree(nc); 235 return tmp; 236 } 237 238 list_add_tail_rcu(&nc->node, &np->channels); 239 np->channel_num++; 240 spin_unlock_irqrestore(&np->lock, flags); 241 242 return nc; 243 } 244 245 static void ncsi_remove_channel(struct ncsi_channel *nc) 246 { 247 struct ncsi_package *np = nc->package; 248 unsigned long flags; 249 250 spin_lock_irqsave(&nc->lock, flags); 251 252 /* Release filters */ 253 kfree(nc->mac_filter.addrs); 254 kfree(nc->vlan_filter.vids); 255 256 nc->state = NCSI_CHANNEL_INACTIVE; 257 spin_unlock_irqrestore(&nc->lock, flags); 258 ncsi_stop_channel_monitor(nc); 259 260 /* Remove and free channel */ 261 spin_lock_irqsave(&np->lock, flags); 262 list_del_rcu(&nc->node); 263 np->channel_num--; 264 spin_unlock_irqrestore(&np->lock, flags); 265 266 kfree(nc); 267 } 268 269 struct ncsi_package *ncsi_find_package(struct ncsi_dev_priv *ndp, 270 unsigned char id) 271 { 272 struct ncsi_package *np; 273 274 NCSI_FOR_EACH_PACKAGE(ndp, np) { 275 if (np->id == id) 276 return np; 277 } 278 279 return NULL; 280 } 281 282 struct ncsi_package *ncsi_add_package(struct ncsi_dev_priv *ndp, 283 unsigned char id) 284 { 285 struct ncsi_package *np, *tmp; 286 unsigned long flags; 287 288 np = kzalloc(sizeof(*np), GFP_ATOMIC); 289 if (!np) 290 return NULL; 291 292 np->id = id; 293 np->ndp = ndp; 294 spin_lock_init(&np->lock); 295 INIT_LIST_HEAD(&np->channels); 296 np->channel_whitelist = UINT_MAX; 297 298 spin_lock_irqsave(&ndp->lock, flags); 299 tmp = ncsi_find_package(ndp, id); 300 if (tmp) { 301 spin_unlock_irqrestore(&ndp->lock, flags); 302 kfree(np); 303 return tmp; 304 } 305 306 list_add_tail_rcu(&np->node, &ndp->packages); 307 ndp->package_num++; 308 spin_unlock_irqrestore(&ndp->lock, flags); 309 310 return np; 311 } 312 313 void ncsi_remove_package(struct ncsi_package *np) 314 { 315 struct ncsi_dev_priv *ndp = np->ndp; 316 struct ncsi_channel *nc, *tmp; 317 unsigned long flags; 318 319 /* Release all child channels */ 320 list_for_each_entry_safe(nc, tmp, &np->channels, node) 321 ncsi_remove_channel(nc); 322 323 /* Remove and free package */ 324 spin_lock_irqsave(&ndp->lock, flags); 325 list_del_rcu(&np->node); 326 ndp->package_num--; 327 spin_unlock_irqrestore(&ndp->lock, flags); 328 329 kfree(np); 330 } 331 332 void ncsi_find_package_and_channel(struct ncsi_dev_priv *ndp, 333 unsigned char id, 334 struct ncsi_package **np, 335 struct ncsi_channel **nc) 336 { 337 struct ncsi_package *p; 338 struct ncsi_channel *c; 339 340 p = ncsi_find_package(ndp, NCSI_PACKAGE_INDEX(id)); 341 c = p ? ncsi_find_channel(p, NCSI_CHANNEL_INDEX(id)) : NULL; 342 343 if (np) 344 *np = p; 345 if (nc) 346 *nc = c; 347 } 348 349 /* For two consecutive NCSI commands, the packet IDs shouldn't 350 * be same. Otherwise, the bogus response might be replied. So 351 * the available IDs are allocated in round-robin fashion. 352 */ 353 struct ncsi_request *ncsi_alloc_request(struct ncsi_dev_priv *ndp, 354 unsigned int req_flags) 355 { 356 struct ncsi_request *nr = NULL; 357 int i, limit = ARRAY_SIZE(ndp->requests); 358 unsigned long flags; 359 360 /* Check if there is one available request until the ceiling */ 361 spin_lock_irqsave(&ndp->lock, flags); 362 for (i = ndp->request_id; i < limit; i++) { 363 if (ndp->requests[i].used) 364 continue; 365 366 nr = &ndp->requests[i]; 367 nr->used = true; 368 nr->flags = req_flags; 369 ndp->request_id = i + 1; 370 goto found; 371 } 372 373 /* Fail back to check from the starting cursor */ 374 for (i = NCSI_REQ_START_IDX; i < ndp->request_id; i++) { 375 if (ndp->requests[i].used) 376 continue; 377 378 nr = &ndp->requests[i]; 379 nr->used = true; 380 nr->flags = req_flags; 381 ndp->request_id = i + 1; 382 goto found; 383 } 384 385 found: 386 spin_unlock_irqrestore(&ndp->lock, flags); 387 return nr; 388 } 389 390 void ncsi_free_request(struct ncsi_request *nr) 391 { 392 struct ncsi_dev_priv *ndp = nr->ndp; 393 struct sk_buff *cmd, *rsp; 394 unsigned long flags; 395 bool driven; 396 397 if (nr->enabled) { 398 nr->enabled = false; 399 del_timer_sync(&nr->timer); 400 } 401 402 spin_lock_irqsave(&ndp->lock, flags); 403 cmd = nr->cmd; 404 rsp = nr->rsp; 405 nr->cmd = NULL; 406 nr->rsp = NULL; 407 nr->used = false; 408 driven = !!(nr->flags & NCSI_REQ_FLAG_EVENT_DRIVEN); 409 spin_unlock_irqrestore(&ndp->lock, flags); 410 411 if (driven && cmd && --ndp->pending_req_num == 0) 412 schedule_work(&ndp->work); 413 414 /* Release command and response */ 415 consume_skb(cmd); 416 consume_skb(rsp); 417 } 418 419 struct ncsi_dev *ncsi_find_dev(struct net_device *dev) 420 { 421 struct ncsi_dev_priv *ndp; 422 423 NCSI_FOR_EACH_DEV(ndp) { 424 if (ndp->ndev.dev == dev) 425 return &ndp->ndev; 426 } 427 428 return NULL; 429 } 430 431 static void ncsi_request_timeout(struct timer_list *t) 432 { 433 struct ncsi_request *nr = from_timer(nr, t, timer); 434 struct ncsi_dev_priv *ndp = nr->ndp; 435 struct ncsi_cmd_pkt *cmd; 436 struct ncsi_package *np; 437 struct ncsi_channel *nc; 438 unsigned long flags; 439 440 /* If the request already had associated response, 441 * let the response handler to release it. 442 */ 443 spin_lock_irqsave(&ndp->lock, flags); 444 nr->enabled = false; 445 if (nr->rsp || !nr->cmd) { 446 spin_unlock_irqrestore(&ndp->lock, flags); 447 return; 448 } 449 spin_unlock_irqrestore(&ndp->lock, flags); 450 451 if (nr->flags == NCSI_REQ_FLAG_NETLINK_DRIVEN) { 452 if (nr->cmd) { 453 /* Find the package */ 454 cmd = (struct ncsi_cmd_pkt *) 455 skb_network_header(nr->cmd); 456 ncsi_find_package_and_channel(ndp, 457 cmd->cmd.common.channel, 458 &np, &nc); 459 ncsi_send_netlink_timeout(nr, np, nc); 460 } 461 } 462 463 /* Release the request */ 464 ncsi_free_request(nr); 465 } 466 467 static void ncsi_suspend_channel(struct ncsi_dev_priv *ndp) 468 { 469 struct ncsi_dev *nd = &ndp->ndev; 470 struct ncsi_package *np; 471 struct ncsi_channel *nc, *tmp; 472 struct ncsi_cmd_arg nca; 473 unsigned long flags; 474 int ret; 475 476 np = ndp->active_package; 477 nc = ndp->active_channel; 478 nca.ndp = ndp; 479 nca.req_flags = NCSI_REQ_FLAG_EVENT_DRIVEN; 480 switch (nd->state) { 481 case ncsi_dev_state_suspend: 482 nd->state = ncsi_dev_state_suspend_select; 483 fallthrough; 484 case ncsi_dev_state_suspend_select: 485 ndp->pending_req_num = 1; 486 487 nca.type = NCSI_PKT_CMD_SP; 488 nca.package = np->id; 489 nca.channel = NCSI_RESERVED_CHANNEL; 490 if (ndp->flags & NCSI_DEV_HWA) 491 nca.bytes[0] = 0; 492 else 493 nca.bytes[0] = 1; 494 495 /* To retrieve the last link states of channels in current 496 * package when current active channel needs fail over to 497 * another one. It means we will possibly select another 498 * channel as next active one. The link states of channels 499 * are most important factor of the selection. So we need 500 * accurate link states. Unfortunately, the link states on 501 * inactive channels can't be updated with LSC AEN in time. 502 */ 503 if (ndp->flags & NCSI_DEV_RESHUFFLE) 504 nd->state = ncsi_dev_state_suspend_gls; 505 else 506 nd->state = ncsi_dev_state_suspend_dcnt; 507 ret = ncsi_xmit_cmd(&nca); 508 if (ret) 509 goto error; 510 511 break; 512 case ncsi_dev_state_suspend_gls: 513 ndp->pending_req_num = 1; 514 515 nca.type = NCSI_PKT_CMD_GLS; 516 nca.package = np->id; 517 nca.channel = ndp->channel_probe_id; 518 ret = ncsi_xmit_cmd(&nca); 519 if (ret) 520 goto error; 521 ndp->channel_probe_id++; 522 523 if (ndp->channel_probe_id == ndp->channel_count) { 524 ndp->channel_probe_id = 0; 525 nd->state = ncsi_dev_state_suspend_dcnt; 526 } 527 528 break; 529 case ncsi_dev_state_suspend_dcnt: 530 ndp->pending_req_num = 1; 531 532 nca.type = NCSI_PKT_CMD_DCNT; 533 nca.package = np->id; 534 nca.channel = nc->id; 535 536 nd->state = ncsi_dev_state_suspend_dc; 537 ret = ncsi_xmit_cmd(&nca); 538 if (ret) 539 goto error; 540 541 break; 542 case ncsi_dev_state_suspend_dc: 543 ndp->pending_req_num = 1; 544 545 nca.type = NCSI_PKT_CMD_DC; 546 nca.package = np->id; 547 nca.channel = nc->id; 548 nca.bytes[0] = 1; 549 550 nd->state = ncsi_dev_state_suspend_deselect; 551 ret = ncsi_xmit_cmd(&nca); 552 if (ret) 553 goto error; 554 555 NCSI_FOR_EACH_CHANNEL(np, tmp) { 556 /* If there is another channel active on this package 557 * do not deselect the package. 558 */ 559 if (tmp != nc && tmp->state == NCSI_CHANNEL_ACTIVE) { 560 nd->state = ncsi_dev_state_suspend_done; 561 break; 562 } 563 } 564 break; 565 case ncsi_dev_state_suspend_deselect: 566 ndp->pending_req_num = 1; 567 568 nca.type = NCSI_PKT_CMD_DP; 569 nca.package = np->id; 570 nca.channel = NCSI_RESERVED_CHANNEL; 571 572 nd->state = ncsi_dev_state_suspend_done; 573 ret = ncsi_xmit_cmd(&nca); 574 if (ret) 575 goto error; 576 577 break; 578 case ncsi_dev_state_suspend_done: 579 spin_lock_irqsave(&nc->lock, flags); 580 nc->state = NCSI_CHANNEL_INACTIVE; 581 spin_unlock_irqrestore(&nc->lock, flags); 582 if (ndp->flags & NCSI_DEV_RESET) 583 ncsi_reset_dev(nd); 584 else 585 ncsi_process_next_channel(ndp); 586 break; 587 default: 588 netdev_warn(nd->dev, "Wrong NCSI state 0x%x in suspend\n", 589 nd->state); 590 } 591 592 return; 593 error: 594 nd->state = ncsi_dev_state_functional; 595 } 596 597 /* Check the VLAN filter bitmap for a set filter, and construct a 598 * "Set VLAN Filter - Disable" packet if found. 599 */ 600 static int clear_one_vid(struct ncsi_dev_priv *ndp, struct ncsi_channel *nc, 601 struct ncsi_cmd_arg *nca) 602 { 603 struct ncsi_channel_vlan_filter *ncf; 604 unsigned long flags; 605 void *bitmap; 606 int index; 607 u16 vid; 608 609 ncf = &nc->vlan_filter; 610 bitmap = &ncf->bitmap; 611 612 spin_lock_irqsave(&nc->lock, flags); 613 index = find_first_bit(bitmap, ncf->n_vids); 614 if (index >= ncf->n_vids) { 615 spin_unlock_irqrestore(&nc->lock, flags); 616 return -1; 617 } 618 vid = ncf->vids[index]; 619 620 clear_bit(index, bitmap); 621 ncf->vids[index] = 0; 622 spin_unlock_irqrestore(&nc->lock, flags); 623 624 nca->type = NCSI_PKT_CMD_SVF; 625 nca->words[1] = vid; 626 /* HW filter index starts at 1 */ 627 nca->bytes[6] = index + 1; 628 nca->bytes[7] = 0x00; 629 return 0; 630 } 631 632 /* Find an outstanding VLAN tag and construct a "Set VLAN Filter - Enable" 633 * packet. 634 */ 635 static int set_one_vid(struct ncsi_dev_priv *ndp, struct ncsi_channel *nc, 636 struct ncsi_cmd_arg *nca) 637 { 638 struct ncsi_channel_vlan_filter *ncf; 639 struct vlan_vid *vlan = NULL; 640 unsigned long flags; 641 int i, index; 642 void *bitmap; 643 u16 vid; 644 645 if (list_empty(&ndp->vlan_vids)) 646 return -1; 647 648 ncf = &nc->vlan_filter; 649 bitmap = &ncf->bitmap; 650 651 spin_lock_irqsave(&nc->lock, flags); 652 653 rcu_read_lock(); 654 list_for_each_entry_rcu(vlan, &ndp->vlan_vids, list) { 655 vid = vlan->vid; 656 for (i = 0; i < ncf->n_vids; i++) 657 if (ncf->vids[i] == vid) { 658 vid = 0; 659 break; 660 } 661 if (vid) 662 break; 663 } 664 rcu_read_unlock(); 665 666 if (!vid) { 667 /* No VLAN ID is not set */ 668 spin_unlock_irqrestore(&nc->lock, flags); 669 return -1; 670 } 671 672 index = find_first_zero_bit(bitmap, ncf->n_vids); 673 if (index < 0 || index >= ncf->n_vids) { 674 netdev_err(ndp->ndev.dev, 675 "Channel %u already has all VLAN filters set\n", 676 nc->id); 677 spin_unlock_irqrestore(&nc->lock, flags); 678 return -1; 679 } 680 681 ncf->vids[index] = vid; 682 set_bit(index, bitmap); 683 spin_unlock_irqrestore(&nc->lock, flags); 684 685 nca->type = NCSI_PKT_CMD_SVF; 686 nca->words[1] = vid; 687 /* HW filter index starts at 1 */ 688 nca->bytes[6] = index + 1; 689 nca->bytes[7] = 0x01; 690 691 return 0; 692 } 693 694 static int ncsi_oem_keep_phy_intel(struct ncsi_cmd_arg *nca) 695 { 696 unsigned char data[NCSI_OEM_INTEL_CMD_KEEP_PHY_LEN]; 697 int ret = 0; 698 699 nca->payload = NCSI_OEM_INTEL_CMD_KEEP_PHY_LEN; 700 701 memset(data, 0, NCSI_OEM_INTEL_CMD_KEEP_PHY_LEN); 702 *(unsigned int *)data = ntohl((__force __be32)NCSI_OEM_MFR_INTEL_ID); 703 704 data[4] = NCSI_OEM_INTEL_CMD_KEEP_PHY; 705 706 /* PHY Link up attribute */ 707 data[6] = 0x1; 708 709 nca->data = data; 710 711 ret = ncsi_xmit_cmd(nca); 712 if (ret) 713 netdev_err(nca->ndp->ndev.dev, 714 "NCSI: Failed to transmit cmd 0x%x during configure\n", 715 nca->type); 716 return ret; 717 } 718 719 /* NCSI OEM Command APIs */ 720 static int ncsi_oem_gma_handler_bcm(struct ncsi_cmd_arg *nca) 721 { 722 unsigned char data[NCSI_OEM_BCM_CMD_GMA_LEN]; 723 int ret = 0; 724 725 nca->payload = NCSI_OEM_BCM_CMD_GMA_LEN; 726 727 memset(data, 0, NCSI_OEM_BCM_CMD_GMA_LEN); 728 *(unsigned int *)data = ntohl((__force __be32)NCSI_OEM_MFR_BCM_ID); 729 data[5] = NCSI_OEM_BCM_CMD_GMA; 730 731 nca->data = data; 732 733 ret = ncsi_xmit_cmd(nca); 734 if (ret) 735 netdev_err(nca->ndp->ndev.dev, 736 "NCSI: Failed to transmit cmd 0x%x during configure\n", 737 nca->type); 738 return ret; 739 } 740 741 static int ncsi_oem_gma_handler_mlx(struct ncsi_cmd_arg *nca) 742 { 743 union { 744 u8 data_u8[NCSI_OEM_MLX_CMD_GMA_LEN]; 745 u32 data_u32[NCSI_OEM_MLX_CMD_GMA_LEN / sizeof(u32)]; 746 } u; 747 int ret = 0; 748 749 nca->payload = NCSI_OEM_MLX_CMD_GMA_LEN; 750 751 memset(&u, 0, sizeof(u)); 752 u.data_u32[0] = ntohl((__force __be32)NCSI_OEM_MFR_MLX_ID); 753 u.data_u8[5] = NCSI_OEM_MLX_CMD_GMA; 754 u.data_u8[6] = NCSI_OEM_MLX_CMD_GMA_PARAM; 755 756 nca->data = u.data_u8; 757 758 ret = ncsi_xmit_cmd(nca); 759 if (ret) 760 netdev_err(nca->ndp->ndev.dev, 761 "NCSI: Failed to transmit cmd 0x%x during configure\n", 762 nca->type); 763 return ret; 764 } 765 766 static int ncsi_oem_smaf_mlx(struct ncsi_cmd_arg *nca) 767 { 768 union { 769 u8 data_u8[NCSI_OEM_MLX_CMD_SMAF_LEN]; 770 u32 data_u32[NCSI_OEM_MLX_CMD_SMAF_LEN / sizeof(u32)]; 771 } u; 772 int ret = 0; 773 774 memset(&u, 0, sizeof(u)); 775 u.data_u32[0] = ntohl((__force __be32)NCSI_OEM_MFR_MLX_ID); 776 u.data_u8[5] = NCSI_OEM_MLX_CMD_SMAF; 777 u.data_u8[6] = NCSI_OEM_MLX_CMD_SMAF_PARAM; 778 memcpy(&u.data_u8[MLX_SMAF_MAC_ADDR_OFFSET], 779 nca->ndp->ndev.dev->dev_addr, ETH_ALEN); 780 u.data_u8[MLX_SMAF_MED_SUPPORT_OFFSET] = 781 (MLX_MC_RBT_AVL | MLX_MC_RBT_SUPPORT); 782 783 nca->payload = NCSI_OEM_MLX_CMD_SMAF_LEN; 784 nca->data = u.data_u8; 785 786 ret = ncsi_xmit_cmd(nca); 787 if (ret) 788 netdev_err(nca->ndp->ndev.dev, 789 "NCSI: Failed to transmit cmd 0x%x during probe\n", 790 nca->type); 791 return ret; 792 } 793 794 static int ncsi_oem_gma_handler_intel(struct ncsi_cmd_arg *nca) 795 { 796 unsigned char data[NCSI_OEM_INTEL_CMD_GMA_LEN]; 797 int ret = 0; 798 799 nca->payload = NCSI_OEM_INTEL_CMD_GMA_LEN; 800 801 memset(data, 0, NCSI_OEM_INTEL_CMD_GMA_LEN); 802 *(unsigned int *)data = ntohl((__force __be32)NCSI_OEM_MFR_INTEL_ID); 803 data[4] = NCSI_OEM_INTEL_CMD_GMA; 804 805 nca->data = data; 806 807 ret = ncsi_xmit_cmd(nca); 808 if (ret) 809 netdev_err(nca->ndp->ndev.dev, 810 "NCSI: Failed to transmit cmd 0x%x during configure\n", 811 nca->type); 812 813 return ret; 814 } 815 816 /* OEM Command handlers initialization */ 817 static struct ncsi_oem_gma_handler { 818 unsigned int mfr_id; 819 int (*handler)(struct ncsi_cmd_arg *nca); 820 } ncsi_oem_gma_handlers[] = { 821 { NCSI_OEM_MFR_BCM_ID, ncsi_oem_gma_handler_bcm }, 822 { NCSI_OEM_MFR_MLX_ID, ncsi_oem_gma_handler_mlx }, 823 { NCSI_OEM_MFR_INTEL_ID, ncsi_oem_gma_handler_intel } 824 }; 825 826 static int ncsi_gma_handler(struct ncsi_cmd_arg *nca, unsigned int mf_id) 827 { 828 struct ncsi_oem_gma_handler *nch = NULL; 829 int i; 830 831 /* This function should only be called once, return if flag set */ 832 if (nca->ndp->gma_flag == 1) 833 return -1; 834 835 /* Find gma handler for given manufacturer id */ 836 for (i = 0; i < ARRAY_SIZE(ncsi_oem_gma_handlers); i++) { 837 if (ncsi_oem_gma_handlers[i].mfr_id == mf_id) { 838 if (ncsi_oem_gma_handlers[i].handler) 839 nch = &ncsi_oem_gma_handlers[i]; 840 break; 841 } 842 } 843 844 if (!nch) { 845 netdev_err(nca->ndp->ndev.dev, 846 "NCSI: No GMA handler available for MFR-ID (0x%x)\n", 847 mf_id); 848 return -1; 849 } 850 851 /* Get Mac address from NCSI device */ 852 return nch->handler(nca); 853 } 854 855 /* Determine if a given channel from the channel_queue should be used for Tx */ 856 static bool ncsi_channel_is_tx(struct ncsi_dev_priv *ndp, 857 struct ncsi_channel *nc) 858 { 859 struct ncsi_channel_mode *ncm; 860 struct ncsi_channel *channel; 861 struct ncsi_package *np; 862 863 /* Check if any other channel has Tx enabled; a channel may have already 864 * been configured and removed from the channel queue. 865 */ 866 NCSI_FOR_EACH_PACKAGE(ndp, np) { 867 if (!ndp->multi_package && np != nc->package) 868 continue; 869 NCSI_FOR_EACH_CHANNEL(np, channel) { 870 ncm = &channel->modes[NCSI_MODE_TX_ENABLE]; 871 if (ncm->enable) 872 return false; 873 } 874 } 875 876 /* This channel is the preferred channel and has link */ 877 list_for_each_entry_rcu(channel, &ndp->channel_queue, link) { 878 np = channel->package; 879 if (np->preferred_channel && 880 ncsi_channel_has_link(np->preferred_channel)) { 881 return np->preferred_channel == nc; 882 } 883 } 884 885 /* This channel has link */ 886 if (ncsi_channel_has_link(nc)) 887 return true; 888 889 list_for_each_entry_rcu(channel, &ndp->channel_queue, link) 890 if (ncsi_channel_has_link(channel)) 891 return false; 892 893 /* No other channel has link; default to this one */ 894 return true; 895 } 896 897 /* Change the active Tx channel in a multi-channel setup */ 898 int ncsi_update_tx_channel(struct ncsi_dev_priv *ndp, 899 struct ncsi_package *package, 900 struct ncsi_channel *disable, 901 struct ncsi_channel *enable) 902 { 903 struct ncsi_cmd_arg nca; 904 struct ncsi_channel *nc; 905 struct ncsi_package *np; 906 int ret = 0; 907 908 if (!package->multi_channel && !ndp->multi_package) 909 netdev_warn(ndp->ndev.dev, 910 "NCSI: Trying to update Tx channel in single-channel mode\n"); 911 nca.ndp = ndp; 912 nca.req_flags = 0; 913 914 /* Find current channel with Tx enabled */ 915 NCSI_FOR_EACH_PACKAGE(ndp, np) { 916 if (disable) 917 break; 918 if (!ndp->multi_package && np != package) 919 continue; 920 921 NCSI_FOR_EACH_CHANNEL(np, nc) 922 if (nc->modes[NCSI_MODE_TX_ENABLE].enable) { 923 disable = nc; 924 break; 925 } 926 } 927 928 /* Find a suitable channel for Tx */ 929 NCSI_FOR_EACH_PACKAGE(ndp, np) { 930 if (enable) 931 break; 932 if (!ndp->multi_package && np != package) 933 continue; 934 if (!(ndp->package_whitelist & (0x1 << np->id))) 935 continue; 936 937 if (np->preferred_channel && 938 ncsi_channel_has_link(np->preferred_channel)) { 939 enable = np->preferred_channel; 940 break; 941 } 942 943 NCSI_FOR_EACH_CHANNEL(np, nc) { 944 if (!(np->channel_whitelist & 0x1 << nc->id)) 945 continue; 946 if (nc->state != NCSI_CHANNEL_ACTIVE) 947 continue; 948 if (ncsi_channel_has_link(nc)) { 949 enable = nc; 950 break; 951 } 952 } 953 } 954 955 if (disable == enable) 956 return -1; 957 958 if (!enable) 959 return -1; 960 961 if (disable) { 962 nca.channel = disable->id; 963 nca.package = disable->package->id; 964 nca.type = NCSI_PKT_CMD_DCNT; 965 ret = ncsi_xmit_cmd(&nca); 966 if (ret) 967 netdev_err(ndp->ndev.dev, 968 "Error %d sending DCNT\n", 969 ret); 970 } 971 972 netdev_info(ndp->ndev.dev, "NCSI: channel %u enables Tx\n", enable->id); 973 974 nca.channel = enable->id; 975 nca.package = enable->package->id; 976 nca.type = NCSI_PKT_CMD_ECNT; 977 ret = ncsi_xmit_cmd(&nca); 978 if (ret) 979 netdev_err(ndp->ndev.dev, 980 "Error %d sending ECNT\n", 981 ret); 982 983 return ret; 984 } 985 986 static void ncsi_configure_channel(struct ncsi_dev_priv *ndp) 987 { 988 struct ncsi_package *np = ndp->active_package; 989 struct ncsi_channel *nc = ndp->active_channel; 990 struct ncsi_channel *hot_nc = NULL; 991 struct ncsi_dev *nd = &ndp->ndev; 992 struct net_device *dev = nd->dev; 993 struct ncsi_cmd_arg nca; 994 unsigned char index; 995 unsigned long flags; 996 int ret; 997 998 nca.ndp = ndp; 999 nca.req_flags = NCSI_REQ_FLAG_EVENT_DRIVEN; 1000 switch (nd->state) { 1001 case ncsi_dev_state_config: 1002 case ncsi_dev_state_config_sp: 1003 ndp->pending_req_num = 1; 1004 1005 /* Select the specific package */ 1006 nca.type = NCSI_PKT_CMD_SP; 1007 if (ndp->flags & NCSI_DEV_HWA) 1008 nca.bytes[0] = 0; 1009 else 1010 nca.bytes[0] = 1; 1011 nca.package = np->id; 1012 nca.channel = NCSI_RESERVED_CHANNEL; 1013 ret = ncsi_xmit_cmd(&nca); 1014 if (ret) { 1015 netdev_err(ndp->ndev.dev, 1016 "NCSI: Failed to transmit CMD_SP\n"); 1017 goto error; 1018 } 1019 1020 nd->state = ncsi_dev_state_config_cis; 1021 break; 1022 case ncsi_dev_state_config_cis: 1023 ndp->pending_req_num = 1; 1024 1025 /* Clear initial state */ 1026 nca.type = NCSI_PKT_CMD_CIS; 1027 nca.package = np->id; 1028 nca.channel = nc->id; 1029 ret = ncsi_xmit_cmd(&nca); 1030 if (ret) { 1031 netdev_err(ndp->ndev.dev, 1032 "NCSI: Failed to transmit CMD_CIS\n"); 1033 goto error; 1034 } 1035 1036 nd->state = IS_ENABLED(CONFIG_NCSI_OEM_CMD_GET_MAC) 1037 ? ncsi_dev_state_config_oem_gma 1038 : ncsi_dev_state_config_clear_vids; 1039 break; 1040 case ncsi_dev_state_config_oem_gma: 1041 nd->state = ncsi_dev_state_config_clear_vids; 1042 1043 nca.type = NCSI_PKT_CMD_OEM; 1044 nca.package = np->id; 1045 nca.channel = nc->id; 1046 ndp->pending_req_num = 1; 1047 ret = ncsi_gma_handler(&nca, nc->version.mf_id); 1048 if (ret < 0) 1049 schedule_work(&ndp->work); 1050 1051 break; 1052 case ncsi_dev_state_config_clear_vids: 1053 case ncsi_dev_state_config_svf: 1054 case ncsi_dev_state_config_ev: 1055 case ncsi_dev_state_config_sma: 1056 case ncsi_dev_state_config_ebf: 1057 case ncsi_dev_state_config_dgmf: 1058 case ncsi_dev_state_config_ecnt: 1059 case ncsi_dev_state_config_ec: 1060 case ncsi_dev_state_config_ae: 1061 case ncsi_dev_state_config_gls: 1062 ndp->pending_req_num = 1; 1063 1064 nca.package = np->id; 1065 nca.channel = nc->id; 1066 1067 /* Clear any active filters on the channel before setting */ 1068 if (nd->state == ncsi_dev_state_config_clear_vids) { 1069 ret = clear_one_vid(ndp, nc, &nca); 1070 if (ret) { 1071 nd->state = ncsi_dev_state_config_svf; 1072 schedule_work(&ndp->work); 1073 break; 1074 } 1075 /* Repeat */ 1076 nd->state = ncsi_dev_state_config_clear_vids; 1077 /* Add known VLAN tags to the filter */ 1078 } else if (nd->state == ncsi_dev_state_config_svf) { 1079 ret = set_one_vid(ndp, nc, &nca); 1080 if (ret) { 1081 nd->state = ncsi_dev_state_config_ev; 1082 schedule_work(&ndp->work); 1083 break; 1084 } 1085 /* Repeat */ 1086 nd->state = ncsi_dev_state_config_svf; 1087 /* Enable/Disable the VLAN filter */ 1088 } else if (nd->state == ncsi_dev_state_config_ev) { 1089 if (list_empty(&ndp->vlan_vids)) { 1090 nca.type = NCSI_PKT_CMD_DV; 1091 } else { 1092 nca.type = NCSI_PKT_CMD_EV; 1093 nca.bytes[3] = NCSI_CAP_VLAN_NO; 1094 } 1095 nd->state = ncsi_dev_state_config_sma; 1096 } else if (nd->state == ncsi_dev_state_config_sma) { 1097 /* Use first entry in unicast filter table. Note that 1098 * the MAC filter table starts from entry 1 instead of 1099 * 0. 1100 */ 1101 nca.type = NCSI_PKT_CMD_SMA; 1102 for (index = 0; index < 6; index++) 1103 nca.bytes[index] = dev->dev_addr[index]; 1104 nca.bytes[6] = 0x1; 1105 nca.bytes[7] = 0x1; 1106 nd->state = ncsi_dev_state_config_ebf; 1107 } else if (nd->state == ncsi_dev_state_config_ebf) { 1108 nca.type = NCSI_PKT_CMD_EBF; 1109 nca.dwords[0] = nc->caps[NCSI_CAP_BC].cap; 1110 /* if multicast global filtering is supported then 1111 * disable it so that all multicast packet will be 1112 * forwarded to management controller 1113 */ 1114 if (nc->caps[NCSI_CAP_GENERIC].cap & 1115 NCSI_CAP_GENERIC_MC) 1116 nd->state = ncsi_dev_state_config_dgmf; 1117 else if (ncsi_channel_is_tx(ndp, nc)) 1118 nd->state = ncsi_dev_state_config_ecnt; 1119 else 1120 nd->state = ncsi_dev_state_config_ec; 1121 } else if (nd->state == ncsi_dev_state_config_dgmf) { 1122 nca.type = NCSI_PKT_CMD_DGMF; 1123 if (ncsi_channel_is_tx(ndp, nc)) 1124 nd->state = ncsi_dev_state_config_ecnt; 1125 else 1126 nd->state = ncsi_dev_state_config_ec; 1127 } else if (nd->state == ncsi_dev_state_config_ecnt) { 1128 if (np->preferred_channel && 1129 nc != np->preferred_channel) 1130 netdev_info(ndp->ndev.dev, 1131 "NCSI: Tx failed over to channel %u\n", 1132 nc->id); 1133 nca.type = NCSI_PKT_CMD_ECNT; 1134 nd->state = ncsi_dev_state_config_ec; 1135 } else if (nd->state == ncsi_dev_state_config_ec) { 1136 /* Enable AEN if it's supported */ 1137 nca.type = NCSI_PKT_CMD_EC; 1138 nd->state = ncsi_dev_state_config_ae; 1139 if (!(nc->caps[NCSI_CAP_AEN].cap & NCSI_CAP_AEN_MASK)) 1140 nd->state = ncsi_dev_state_config_gls; 1141 } else if (nd->state == ncsi_dev_state_config_ae) { 1142 nca.type = NCSI_PKT_CMD_AE; 1143 nca.bytes[0] = 0; 1144 nca.dwords[1] = nc->caps[NCSI_CAP_AEN].cap; 1145 nd->state = ncsi_dev_state_config_gls; 1146 } else if (nd->state == ncsi_dev_state_config_gls) { 1147 nca.type = NCSI_PKT_CMD_GLS; 1148 nd->state = ncsi_dev_state_config_done; 1149 } 1150 1151 ret = ncsi_xmit_cmd(&nca); 1152 if (ret) { 1153 netdev_err(ndp->ndev.dev, 1154 "NCSI: Failed to transmit CMD %x\n", 1155 nca.type); 1156 goto error; 1157 } 1158 break; 1159 case ncsi_dev_state_config_done: 1160 netdev_dbg(ndp->ndev.dev, "NCSI: channel %u config done\n", 1161 nc->id); 1162 spin_lock_irqsave(&nc->lock, flags); 1163 nc->state = NCSI_CHANNEL_ACTIVE; 1164 1165 if (ndp->flags & NCSI_DEV_RESET) { 1166 /* A reset event happened during config, start it now */ 1167 nc->reconfigure_needed = false; 1168 spin_unlock_irqrestore(&nc->lock, flags); 1169 ncsi_reset_dev(nd); 1170 break; 1171 } 1172 1173 if (nc->reconfigure_needed) { 1174 /* This channel's configuration has been updated 1175 * part-way during the config state - start the 1176 * channel configuration over 1177 */ 1178 nc->reconfigure_needed = false; 1179 nc->state = NCSI_CHANNEL_INACTIVE; 1180 spin_unlock_irqrestore(&nc->lock, flags); 1181 1182 spin_lock_irqsave(&ndp->lock, flags); 1183 list_add_tail_rcu(&nc->link, &ndp->channel_queue); 1184 spin_unlock_irqrestore(&ndp->lock, flags); 1185 1186 netdev_dbg(dev, "Dirty NCSI channel state reset\n"); 1187 ncsi_process_next_channel(ndp); 1188 break; 1189 } 1190 1191 if (nc->modes[NCSI_MODE_LINK].data[2] & 0x1) { 1192 hot_nc = nc; 1193 } else { 1194 hot_nc = NULL; 1195 netdev_dbg(ndp->ndev.dev, 1196 "NCSI: channel %u link down after config\n", 1197 nc->id); 1198 } 1199 spin_unlock_irqrestore(&nc->lock, flags); 1200 1201 /* Update the hot channel */ 1202 spin_lock_irqsave(&ndp->lock, flags); 1203 ndp->hot_channel = hot_nc; 1204 spin_unlock_irqrestore(&ndp->lock, flags); 1205 1206 ncsi_start_channel_monitor(nc); 1207 ncsi_process_next_channel(ndp); 1208 break; 1209 default: 1210 netdev_alert(dev, "Wrong NCSI state 0x%x in config\n", 1211 nd->state); 1212 } 1213 1214 return; 1215 1216 error: 1217 ncsi_report_link(ndp, true); 1218 } 1219 1220 static int ncsi_choose_active_channel(struct ncsi_dev_priv *ndp) 1221 { 1222 struct ncsi_channel *nc, *found, *hot_nc; 1223 struct ncsi_channel_mode *ncm; 1224 unsigned long flags, cflags; 1225 struct ncsi_package *np; 1226 bool with_link; 1227 1228 spin_lock_irqsave(&ndp->lock, flags); 1229 hot_nc = ndp->hot_channel; 1230 spin_unlock_irqrestore(&ndp->lock, flags); 1231 1232 /* By default the search is done once an inactive channel with up 1233 * link is found, unless a preferred channel is set. 1234 * If multi_package or multi_channel are configured all channels in the 1235 * whitelist are added to the channel queue. 1236 */ 1237 found = NULL; 1238 with_link = false; 1239 NCSI_FOR_EACH_PACKAGE(ndp, np) { 1240 if (!(ndp->package_whitelist & (0x1 << np->id))) 1241 continue; 1242 NCSI_FOR_EACH_CHANNEL(np, nc) { 1243 if (!(np->channel_whitelist & (0x1 << nc->id))) 1244 continue; 1245 1246 spin_lock_irqsave(&nc->lock, cflags); 1247 1248 if (!list_empty(&nc->link) || 1249 nc->state != NCSI_CHANNEL_INACTIVE) { 1250 spin_unlock_irqrestore(&nc->lock, cflags); 1251 continue; 1252 } 1253 1254 if (!found) 1255 found = nc; 1256 1257 if (nc == hot_nc) 1258 found = nc; 1259 1260 ncm = &nc->modes[NCSI_MODE_LINK]; 1261 if (ncm->data[2] & 0x1) { 1262 found = nc; 1263 with_link = true; 1264 } 1265 1266 /* If multi_channel is enabled configure all valid 1267 * channels whether or not they currently have link 1268 * so they will have AENs enabled. 1269 */ 1270 if (with_link || np->multi_channel) { 1271 spin_lock_irqsave(&ndp->lock, flags); 1272 list_add_tail_rcu(&nc->link, 1273 &ndp->channel_queue); 1274 spin_unlock_irqrestore(&ndp->lock, flags); 1275 1276 netdev_dbg(ndp->ndev.dev, 1277 "NCSI: Channel %u added to queue (link %s)\n", 1278 nc->id, 1279 ncm->data[2] & 0x1 ? "up" : "down"); 1280 } 1281 1282 spin_unlock_irqrestore(&nc->lock, cflags); 1283 1284 if (with_link && !np->multi_channel) 1285 break; 1286 } 1287 if (with_link && !ndp->multi_package) 1288 break; 1289 } 1290 1291 if (list_empty(&ndp->channel_queue) && found) { 1292 netdev_info(ndp->ndev.dev, 1293 "NCSI: No channel with link found, configuring channel %u\n", 1294 found->id); 1295 spin_lock_irqsave(&ndp->lock, flags); 1296 list_add_tail_rcu(&found->link, &ndp->channel_queue); 1297 spin_unlock_irqrestore(&ndp->lock, flags); 1298 } else if (!found) { 1299 netdev_warn(ndp->ndev.dev, 1300 "NCSI: No channel found to configure!\n"); 1301 ncsi_report_link(ndp, true); 1302 return -ENODEV; 1303 } 1304 1305 return ncsi_process_next_channel(ndp); 1306 } 1307 1308 static bool ncsi_check_hwa(struct ncsi_dev_priv *ndp) 1309 { 1310 struct ncsi_package *np; 1311 struct ncsi_channel *nc; 1312 unsigned int cap; 1313 bool has_channel = false; 1314 1315 /* The hardware arbitration is disabled if any one channel 1316 * doesn't support explicitly. 1317 */ 1318 NCSI_FOR_EACH_PACKAGE(ndp, np) { 1319 NCSI_FOR_EACH_CHANNEL(np, nc) { 1320 has_channel = true; 1321 1322 cap = nc->caps[NCSI_CAP_GENERIC].cap; 1323 if (!(cap & NCSI_CAP_GENERIC_HWA) || 1324 (cap & NCSI_CAP_GENERIC_HWA_MASK) != 1325 NCSI_CAP_GENERIC_HWA_SUPPORT) { 1326 ndp->flags &= ~NCSI_DEV_HWA; 1327 return false; 1328 } 1329 } 1330 } 1331 1332 if (has_channel) { 1333 ndp->flags |= NCSI_DEV_HWA; 1334 return true; 1335 } 1336 1337 ndp->flags &= ~NCSI_DEV_HWA; 1338 return false; 1339 } 1340 1341 static void ncsi_probe_channel(struct ncsi_dev_priv *ndp) 1342 { 1343 struct ncsi_dev *nd = &ndp->ndev; 1344 struct ncsi_package *np; 1345 struct ncsi_cmd_arg nca; 1346 unsigned char index; 1347 int ret; 1348 1349 nca.ndp = ndp; 1350 nca.req_flags = NCSI_REQ_FLAG_EVENT_DRIVEN; 1351 switch (nd->state) { 1352 case ncsi_dev_state_probe: 1353 nd->state = ncsi_dev_state_probe_deselect; 1354 fallthrough; 1355 case ncsi_dev_state_probe_deselect: 1356 ndp->pending_req_num = 8; 1357 1358 /* Deselect all possible packages */ 1359 nca.type = NCSI_PKT_CMD_DP; 1360 nca.channel = NCSI_RESERVED_CHANNEL; 1361 for (index = 0; index < 8; index++) { 1362 nca.package = index; 1363 ret = ncsi_xmit_cmd(&nca); 1364 if (ret) 1365 goto error; 1366 } 1367 1368 nd->state = ncsi_dev_state_probe_package; 1369 break; 1370 case ncsi_dev_state_probe_package: 1371 ndp->pending_req_num = 1; 1372 1373 nca.type = NCSI_PKT_CMD_SP; 1374 nca.bytes[0] = 1; 1375 nca.package = ndp->package_probe_id; 1376 nca.channel = NCSI_RESERVED_CHANNEL; 1377 ret = ncsi_xmit_cmd(&nca); 1378 if (ret) 1379 goto error; 1380 nd->state = ncsi_dev_state_probe_channel; 1381 break; 1382 case ncsi_dev_state_probe_channel: 1383 ndp->active_package = ncsi_find_package(ndp, 1384 ndp->package_probe_id); 1385 if (!ndp->active_package) { 1386 /* No response */ 1387 nd->state = ncsi_dev_state_probe_dp; 1388 schedule_work(&ndp->work); 1389 break; 1390 } 1391 nd->state = ncsi_dev_state_probe_cis; 1392 if (IS_ENABLED(CONFIG_NCSI_OEM_CMD_GET_MAC) && 1393 ndp->mlx_multi_host) 1394 nd->state = ncsi_dev_state_probe_mlx_gma; 1395 1396 schedule_work(&ndp->work); 1397 break; 1398 case ncsi_dev_state_probe_mlx_gma: 1399 ndp->pending_req_num = 1; 1400 1401 nca.type = NCSI_PKT_CMD_OEM; 1402 nca.package = ndp->active_package->id; 1403 nca.channel = 0; 1404 ret = ncsi_oem_gma_handler_mlx(&nca); 1405 if (ret) 1406 goto error; 1407 1408 nd->state = ncsi_dev_state_probe_mlx_smaf; 1409 break; 1410 case ncsi_dev_state_probe_mlx_smaf: 1411 ndp->pending_req_num = 1; 1412 1413 nca.type = NCSI_PKT_CMD_OEM; 1414 nca.package = ndp->active_package->id; 1415 nca.channel = 0; 1416 ret = ncsi_oem_smaf_mlx(&nca); 1417 if (ret) 1418 goto error; 1419 1420 nd->state = ncsi_dev_state_probe_cis; 1421 break; 1422 case ncsi_dev_state_probe_keep_phy: 1423 ndp->pending_req_num = 1; 1424 1425 nca.type = NCSI_PKT_CMD_OEM; 1426 nca.package = ndp->active_package->id; 1427 nca.channel = 0; 1428 ret = ncsi_oem_keep_phy_intel(&nca); 1429 if (ret) 1430 goto error; 1431 1432 nd->state = ncsi_dev_state_probe_gvi; 1433 break; 1434 case ncsi_dev_state_probe_cis: 1435 case ncsi_dev_state_probe_gvi: 1436 case ncsi_dev_state_probe_gc: 1437 case ncsi_dev_state_probe_gls: 1438 np = ndp->active_package; 1439 ndp->pending_req_num = 1; 1440 1441 /* Clear initial state Retrieve version, capability or link status */ 1442 if (nd->state == ncsi_dev_state_probe_cis) 1443 nca.type = NCSI_PKT_CMD_CIS; 1444 else if (nd->state == ncsi_dev_state_probe_gvi) 1445 nca.type = NCSI_PKT_CMD_GVI; 1446 else if (nd->state == ncsi_dev_state_probe_gc) 1447 nca.type = NCSI_PKT_CMD_GC; 1448 else 1449 nca.type = NCSI_PKT_CMD_GLS; 1450 1451 nca.package = np->id; 1452 nca.channel = ndp->channel_probe_id; 1453 1454 ret = ncsi_xmit_cmd(&nca); 1455 if (ret) 1456 goto error; 1457 1458 if (nd->state == ncsi_dev_state_probe_cis) { 1459 nd->state = ncsi_dev_state_probe_gvi; 1460 if (IS_ENABLED(CONFIG_NCSI_OEM_CMD_KEEP_PHY) && ndp->channel_probe_id == 0) 1461 nd->state = ncsi_dev_state_probe_keep_phy; 1462 } else if (nd->state == ncsi_dev_state_probe_gvi) { 1463 nd->state = ncsi_dev_state_probe_gc; 1464 } else if (nd->state == ncsi_dev_state_probe_gc) { 1465 nd->state = ncsi_dev_state_probe_gls; 1466 } else { 1467 nd->state = ncsi_dev_state_probe_cis; 1468 ndp->channel_probe_id++; 1469 } 1470 1471 if (ndp->channel_probe_id == ndp->channel_count) { 1472 ndp->channel_probe_id = 0; 1473 nd->state = ncsi_dev_state_probe_dp; 1474 } 1475 break; 1476 case ncsi_dev_state_probe_dp: 1477 ndp->pending_req_num = 1; 1478 1479 /* Deselect the current package */ 1480 nca.type = NCSI_PKT_CMD_DP; 1481 nca.package = ndp->package_probe_id; 1482 nca.channel = NCSI_RESERVED_CHANNEL; 1483 ret = ncsi_xmit_cmd(&nca); 1484 if (ret) 1485 goto error; 1486 1487 /* Probe next package */ 1488 ndp->package_probe_id++; 1489 if (ndp->package_probe_id >= 8) { 1490 /* Probe finished */ 1491 ndp->flags |= NCSI_DEV_PROBED; 1492 break; 1493 } 1494 nd->state = ncsi_dev_state_probe_package; 1495 ndp->active_package = NULL; 1496 break; 1497 default: 1498 netdev_warn(nd->dev, "Wrong NCSI state 0x%0x in enumeration\n", 1499 nd->state); 1500 } 1501 1502 if (ndp->flags & NCSI_DEV_PROBED) { 1503 /* Check if all packages have HWA support */ 1504 ncsi_check_hwa(ndp); 1505 ncsi_choose_active_channel(ndp); 1506 } 1507 1508 return; 1509 error: 1510 netdev_err(ndp->ndev.dev, 1511 "NCSI: Failed to transmit cmd 0x%x during probe\n", 1512 nca.type); 1513 ncsi_report_link(ndp, true); 1514 } 1515 1516 static void ncsi_dev_work(struct work_struct *work) 1517 { 1518 struct ncsi_dev_priv *ndp = container_of(work, 1519 struct ncsi_dev_priv, work); 1520 struct ncsi_dev *nd = &ndp->ndev; 1521 1522 switch (nd->state & ncsi_dev_state_major) { 1523 case ncsi_dev_state_probe: 1524 ncsi_probe_channel(ndp); 1525 break; 1526 case ncsi_dev_state_suspend: 1527 ncsi_suspend_channel(ndp); 1528 break; 1529 case ncsi_dev_state_config: 1530 ncsi_configure_channel(ndp); 1531 break; 1532 default: 1533 netdev_warn(nd->dev, "Wrong NCSI state 0x%x in workqueue\n", 1534 nd->state); 1535 } 1536 } 1537 1538 int ncsi_process_next_channel(struct ncsi_dev_priv *ndp) 1539 { 1540 struct ncsi_channel *nc; 1541 int old_state; 1542 unsigned long flags; 1543 1544 spin_lock_irqsave(&ndp->lock, flags); 1545 nc = list_first_or_null_rcu(&ndp->channel_queue, 1546 struct ncsi_channel, link); 1547 if (!nc) { 1548 spin_unlock_irqrestore(&ndp->lock, flags); 1549 goto out; 1550 } 1551 1552 list_del_init(&nc->link); 1553 spin_unlock_irqrestore(&ndp->lock, flags); 1554 1555 spin_lock_irqsave(&nc->lock, flags); 1556 old_state = nc->state; 1557 nc->state = NCSI_CHANNEL_INVISIBLE; 1558 spin_unlock_irqrestore(&nc->lock, flags); 1559 1560 ndp->active_channel = nc; 1561 ndp->active_package = nc->package; 1562 1563 switch (old_state) { 1564 case NCSI_CHANNEL_INACTIVE: 1565 ndp->ndev.state = ncsi_dev_state_config; 1566 netdev_dbg(ndp->ndev.dev, "NCSI: configuring channel %u\n", 1567 nc->id); 1568 ncsi_configure_channel(ndp); 1569 break; 1570 case NCSI_CHANNEL_ACTIVE: 1571 ndp->ndev.state = ncsi_dev_state_suspend; 1572 netdev_dbg(ndp->ndev.dev, "NCSI: suspending channel %u\n", 1573 nc->id); 1574 ncsi_suspend_channel(ndp); 1575 break; 1576 default: 1577 netdev_err(ndp->ndev.dev, "Invalid state 0x%x on %d:%d\n", 1578 old_state, nc->package->id, nc->id); 1579 ncsi_report_link(ndp, false); 1580 return -EINVAL; 1581 } 1582 1583 return 0; 1584 1585 out: 1586 ndp->active_channel = NULL; 1587 ndp->active_package = NULL; 1588 if (ndp->flags & NCSI_DEV_RESHUFFLE) { 1589 ndp->flags &= ~NCSI_DEV_RESHUFFLE; 1590 return ncsi_choose_active_channel(ndp); 1591 } 1592 1593 ncsi_report_link(ndp, false); 1594 return -ENODEV; 1595 } 1596 1597 static int ncsi_kick_channels(struct ncsi_dev_priv *ndp) 1598 { 1599 struct ncsi_dev *nd = &ndp->ndev; 1600 struct ncsi_channel *nc; 1601 struct ncsi_package *np; 1602 unsigned long flags; 1603 unsigned int n = 0; 1604 1605 NCSI_FOR_EACH_PACKAGE(ndp, np) { 1606 NCSI_FOR_EACH_CHANNEL(np, nc) { 1607 spin_lock_irqsave(&nc->lock, flags); 1608 1609 /* Channels may be busy, mark dirty instead of 1610 * kicking if; 1611 * a) not ACTIVE (configured) 1612 * b) in the channel_queue (to be configured) 1613 * c) it's ndev is in the config state 1614 */ 1615 if (nc->state != NCSI_CHANNEL_ACTIVE) { 1616 if ((ndp->ndev.state & 0xff00) == 1617 ncsi_dev_state_config || 1618 !list_empty(&nc->link)) { 1619 netdev_dbg(nd->dev, 1620 "NCSI: channel %p marked dirty\n", 1621 nc); 1622 nc->reconfigure_needed = true; 1623 } 1624 spin_unlock_irqrestore(&nc->lock, flags); 1625 continue; 1626 } 1627 1628 spin_unlock_irqrestore(&nc->lock, flags); 1629 1630 ncsi_stop_channel_monitor(nc); 1631 spin_lock_irqsave(&nc->lock, flags); 1632 nc->state = NCSI_CHANNEL_INACTIVE; 1633 spin_unlock_irqrestore(&nc->lock, flags); 1634 1635 spin_lock_irqsave(&ndp->lock, flags); 1636 list_add_tail_rcu(&nc->link, &ndp->channel_queue); 1637 spin_unlock_irqrestore(&ndp->lock, flags); 1638 1639 netdev_dbg(nd->dev, "NCSI: kicked channel %p\n", nc); 1640 n++; 1641 } 1642 } 1643 1644 return n; 1645 } 1646 1647 int ncsi_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid) 1648 { 1649 struct ncsi_dev_priv *ndp; 1650 unsigned int n_vids = 0; 1651 struct vlan_vid *vlan; 1652 struct ncsi_dev *nd; 1653 bool found = false; 1654 1655 if (vid == 0) 1656 return 0; 1657 1658 nd = ncsi_find_dev(dev); 1659 if (!nd) { 1660 netdev_warn(dev, "NCSI: No net_device?\n"); 1661 return 0; 1662 } 1663 1664 ndp = TO_NCSI_DEV_PRIV(nd); 1665 1666 /* Add the VLAN id to our internal list */ 1667 list_for_each_entry_rcu(vlan, &ndp->vlan_vids, list) { 1668 n_vids++; 1669 if (vlan->vid == vid) { 1670 netdev_dbg(dev, "NCSI: vid %u already registered\n", 1671 vid); 1672 return 0; 1673 } 1674 } 1675 if (n_vids >= NCSI_MAX_VLAN_VIDS) { 1676 netdev_warn(dev, 1677 "tried to add vlan id %u but NCSI max already registered (%u)\n", 1678 vid, NCSI_MAX_VLAN_VIDS); 1679 return -ENOSPC; 1680 } 1681 1682 vlan = kzalloc(sizeof(*vlan), GFP_KERNEL); 1683 if (!vlan) 1684 return -ENOMEM; 1685 1686 vlan->proto = proto; 1687 vlan->vid = vid; 1688 list_add_rcu(&vlan->list, &ndp->vlan_vids); 1689 1690 netdev_dbg(dev, "NCSI: Added new vid %u\n", vid); 1691 1692 found = ncsi_kick_channels(ndp) != 0; 1693 1694 return found ? ncsi_process_next_channel(ndp) : 0; 1695 } 1696 EXPORT_SYMBOL_GPL(ncsi_vlan_rx_add_vid); 1697 1698 int ncsi_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid) 1699 { 1700 struct vlan_vid *vlan, *tmp; 1701 struct ncsi_dev_priv *ndp; 1702 struct ncsi_dev *nd; 1703 bool found = false; 1704 1705 if (vid == 0) 1706 return 0; 1707 1708 nd = ncsi_find_dev(dev); 1709 if (!nd) { 1710 netdev_warn(dev, "NCSI: no net_device?\n"); 1711 return 0; 1712 } 1713 1714 ndp = TO_NCSI_DEV_PRIV(nd); 1715 1716 /* Remove the VLAN id from our internal list */ 1717 list_for_each_entry_safe(vlan, tmp, &ndp->vlan_vids, list) 1718 if (vlan->vid == vid) { 1719 netdev_dbg(dev, "NCSI: vid %u found, removing\n", vid); 1720 list_del_rcu(&vlan->list); 1721 found = true; 1722 kfree(vlan); 1723 } 1724 1725 if (!found) { 1726 netdev_err(dev, "NCSI: vid %u wasn't registered!\n", vid); 1727 return -EINVAL; 1728 } 1729 1730 found = ncsi_kick_channels(ndp) != 0; 1731 1732 return found ? ncsi_process_next_channel(ndp) : 0; 1733 } 1734 EXPORT_SYMBOL_GPL(ncsi_vlan_rx_kill_vid); 1735 1736 struct ncsi_dev *ncsi_register_dev(struct net_device *dev, 1737 void (*handler)(struct ncsi_dev *ndev)) 1738 { 1739 struct ncsi_dev_priv *ndp; 1740 struct ncsi_dev *nd; 1741 struct platform_device *pdev; 1742 struct device_node *np; 1743 unsigned long flags; 1744 int i; 1745 1746 /* Check if the device has been registered or not */ 1747 nd = ncsi_find_dev(dev); 1748 if (nd) 1749 return nd; 1750 1751 /* Create NCSI device */ 1752 ndp = kzalloc(sizeof(*ndp), GFP_ATOMIC); 1753 if (!ndp) 1754 return NULL; 1755 1756 nd = &ndp->ndev; 1757 nd->state = ncsi_dev_state_registered; 1758 nd->dev = dev; 1759 nd->handler = handler; 1760 ndp->pending_req_num = 0; 1761 INIT_LIST_HEAD(&ndp->channel_queue); 1762 INIT_LIST_HEAD(&ndp->vlan_vids); 1763 INIT_WORK(&ndp->work, ncsi_dev_work); 1764 ndp->package_whitelist = UINT_MAX; 1765 1766 /* Initialize private NCSI device */ 1767 spin_lock_init(&ndp->lock); 1768 INIT_LIST_HEAD(&ndp->packages); 1769 ndp->request_id = NCSI_REQ_START_IDX; 1770 for (i = 0; i < ARRAY_SIZE(ndp->requests); i++) { 1771 ndp->requests[i].id = i; 1772 ndp->requests[i].ndp = ndp; 1773 timer_setup(&ndp->requests[i].timer, ncsi_request_timeout, 0); 1774 } 1775 ndp->channel_count = NCSI_RESERVED_CHANNEL; 1776 1777 spin_lock_irqsave(&ncsi_dev_lock, flags); 1778 list_add_tail_rcu(&ndp->node, &ncsi_dev_list); 1779 spin_unlock_irqrestore(&ncsi_dev_lock, flags); 1780 1781 /* Register NCSI packet Rx handler */ 1782 ndp->ptype.type = cpu_to_be16(ETH_P_NCSI); 1783 ndp->ptype.func = ncsi_rcv_rsp; 1784 ndp->ptype.dev = dev; 1785 dev_add_pack(&ndp->ptype); 1786 1787 pdev = to_platform_device(dev->dev.parent); 1788 if (pdev) { 1789 np = pdev->dev.of_node; 1790 if (np && (of_property_read_bool(np, "mellanox,multi-host") || 1791 of_property_read_bool(np, "mlx,multi-host"))) 1792 ndp->mlx_multi_host = true; 1793 } 1794 1795 return nd; 1796 } 1797 EXPORT_SYMBOL_GPL(ncsi_register_dev); 1798 1799 int ncsi_start_dev(struct ncsi_dev *nd) 1800 { 1801 struct ncsi_dev_priv *ndp = TO_NCSI_DEV_PRIV(nd); 1802 1803 if (nd->state != ncsi_dev_state_registered && 1804 nd->state != ncsi_dev_state_functional) 1805 return -ENOTTY; 1806 1807 if (!(ndp->flags & NCSI_DEV_PROBED)) { 1808 ndp->package_probe_id = 0; 1809 ndp->channel_probe_id = 0; 1810 nd->state = ncsi_dev_state_probe; 1811 schedule_work(&ndp->work); 1812 return 0; 1813 } 1814 1815 return ncsi_reset_dev(nd); 1816 } 1817 EXPORT_SYMBOL_GPL(ncsi_start_dev); 1818 1819 void ncsi_stop_dev(struct ncsi_dev *nd) 1820 { 1821 struct ncsi_dev_priv *ndp = TO_NCSI_DEV_PRIV(nd); 1822 struct ncsi_package *np; 1823 struct ncsi_channel *nc; 1824 bool chained; 1825 int old_state; 1826 unsigned long flags; 1827 1828 /* Stop the channel monitor on any active channels. Don't reset the 1829 * channel state so we know which were active when ncsi_start_dev() 1830 * is next called. 1831 */ 1832 NCSI_FOR_EACH_PACKAGE(ndp, np) { 1833 NCSI_FOR_EACH_CHANNEL(np, nc) { 1834 ncsi_stop_channel_monitor(nc); 1835 1836 spin_lock_irqsave(&nc->lock, flags); 1837 chained = !list_empty(&nc->link); 1838 old_state = nc->state; 1839 spin_unlock_irqrestore(&nc->lock, flags); 1840 1841 WARN_ON_ONCE(chained || 1842 old_state == NCSI_CHANNEL_INVISIBLE); 1843 } 1844 } 1845 1846 netdev_dbg(ndp->ndev.dev, "NCSI: Stopping device\n"); 1847 ncsi_report_link(ndp, true); 1848 } 1849 EXPORT_SYMBOL_GPL(ncsi_stop_dev); 1850 1851 int ncsi_reset_dev(struct ncsi_dev *nd) 1852 { 1853 struct ncsi_dev_priv *ndp = TO_NCSI_DEV_PRIV(nd); 1854 struct ncsi_channel *nc, *active, *tmp; 1855 struct ncsi_package *np; 1856 unsigned long flags; 1857 1858 spin_lock_irqsave(&ndp->lock, flags); 1859 1860 if (!(ndp->flags & NCSI_DEV_RESET)) { 1861 /* Haven't been called yet, check states */ 1862 switch (nd->state & ncsi_dev_state_major) { 1863 case ncsi_dev_state_registered: 1864 case ncsi_dev_state_probe: 1865 /* Not even probed yet - do nothing */ 1866 spin_unlock_irqrestore(&ndp->lock, flags); 1867 return 0; 1868 case ncsi_dev_state_suspend: 1869 case ncsi_dev_state_config: 1870 /* Wait for the channel to finish its suspend/config 1871 * operation; once it finishes it will check for 1872 * NCSI_DEV_RESET and reset the state. 1873 */ 1874 ndp->flags |= NCSI_DEV_RESET; 1875 spin_unlock_irqrestore(&ndp->lock, flags); 1876 return 0; 1877 } 1878 } else { 1879 switch (nd->state) { 1880 case ncsi_dev_state_suspend_done: 1881 case ncsi_dev_state_config_done: 1882 case ncsi_dev_state_functional: 1883 /* Ok */ 1884 break; 1885 default: 1886 /* Current reset operation happening */ 1887 spin_unlock_irqrestore(&ndp->lock, flags); 1888 return 0; 1889 } 1890 } 1891 1892 if (!list_empty(&ndp->channel_queue)) { 1893 /* Clear any channel queue we may have interrupted */ 1894 list_for_each_entry_safe(nc, tmp, &ndp->channel_queue, link) 1895 list_del_init(&nc->link); 1896 } 1897 spin_unlock_irqrestore(&ndp->lock, flags); 1898 1899 active = NULL; 1900 NCSI_FOR_EACH_PACKAGE(ndp, np) { 1901 NCSI_FOR_EACH_CHANNEL(np, nc) { 1902 spin_lock_irqsave(&nc->lock, flags); 1903 1904 if (nc->state == NCSI_CHANNEL_ACTIVE) { 1905 active = nc; 1906 nc->state = NCSI_CHANNEL_INVISIBLE; 1907 spin_unlock_irqrestore(&nc->lock, flags); 1908 ncsi_stop_channel_monitor(nc); 1909 break; 1910 } 1911 1912 spin_unlock_irqrestore(&nc->lock, flags); 1913 } 1914 if (active) 1915 break; 1916 } 1917 1918 if (!active) { 1919 /* Done */ 1920 spin_lock_irqsave(&ndp->lock, flags); 1921 ndp->flags &= ~NCSI_DEV_RESET; 1922 spin_unlock_irqrestore(&ndp->lock, flags); 1923 return ncsi_choose_active_channel(ndp); 1924 } 1925 1926 spin_lock_irqsave(&ndp->lock, flags); 1927 ndp->flags |= NCSI_DEV_RESET; 1928 ndp->active_channel = active; 1929 ndp->active_package = active->package; 1930 spin_unlock_irqrestore(&ndp->lock, flags); 1931 1932 nd->state = ncsi_dev_state_suspend; 1933 schedule_work(&ndp->work); 1934 return 0; 1935 } 1936 1937 void ncsi_unregister_dev(struct ncsi_dev *nd) 1938 { 1939 struct ncsi_dev_priv *ndp = TO_NCSI_DEV_PRIV(nd); 1940 struct ncsi_package *np, *tmp; 1941 unsigned long flags; 1942 1943 dev_remove_pack(&ndp->ptype); 1944 1945 list_for_each_entry_safe(np, tmp, &ndp->packages, node) 1946 ncsi_remove_package(np); 1947 1948 spin_lock_irqsave(&ncsi_dev_lock, flags); 1949 list_del_rcu(&ndp->node); 1950 spin_unlock_irqrestore(&ncsi_dev_lock, flags); 1951 1952 kfree(ndp); 1953 } 1954 EXPORT_SYMBOL_GPL(ncsi_unregister_dev); 1955