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 = np->channel_num; 514 515 nca.type = NCSI_PKT_CMD_GLS; 516 nca.package = np->id; 517 518 nd->state = ncsi_dev_state_suspend_dcnt; 519 NCSI_FOR_EACH_CHANNEL(np, nc) { 520 nca.channel = nc->id; 521 ret = ncsi_xmit_cmd(&nca); 522 if (ret) 523 goto error; 524 } 525 526 break; 527 case ncsi_dev_state_suspend_dcnt: 528 ndp->pending_req_num = 1; 529 530 nca.type = NCSI_PKT_CMD_DCNT; 531 nca.package = np->id; 532 nca.channel = nc->id; 533 534 nd->state = ncsi_dev_state_suspend_dc; 535 ret = ncsi_xmit_cmd(&nca); 536 if (ret) 537 goto error; 538 539 break; 540 case ncsi_dev_state_suspend_dc: 541 ndp->pending_req_num = 1; 542 543 nca.type = NCSI_PKT_CMD_DC; 544 nca.package = np->id; 545 nca.channel = nc->id; 546 nca.bytes[0] = 1; 547 548 nd->state = ncsi_dev_state_suspend_deselect; 549 ret = ncsi_xmit_cmd(&nca); 550 if (ret) 551 goto error; 552 553 NCSI_FOR_EACH_CHANNEL(np, tmp) { 554 /* If there is another channel active on this package 555 * do not deselect the package. 556 */ 557 if (tmp != nc && tmp->state == NCSI_CHANNEL_ACTIVE) { 558 nd->state = ncsi_dev_state_suspend_done; 559 break; 560 } 561 } 562 break; 563 case ncsi_dev_state_suspend_deselect: 564 ndp->pending_req_num = 1; 565 566 nca.type = NCSI_PKT_CMD_DP; 567 nca.package = np->id; 568 nca.channel = NCSI_RESERVED_CHANNEL; 569 570 nd->state = ncsi_dev_state_suspend_done; 571 ret = ncsi_xmit_cmd(&nca); 572 if (ret) 573 goto error; 574 575 break; 576 case ncsi_dev_state_suspend_done: 577 spin_lock_irqsave(&nc->lock, flags); 578 nc->state = NCSI_CHANNEL_INACTIVE; 579 spin_unlock_irqrestore(&nc->lock, flags); 580 if (ndp->flags & NCSI_DEV_RESET) 581 ncsi_reset_dev(nd); 582 else 583 ncsi_process_next_channel(ndp); 584 break; 585 default: 586 netdev_warn(nd->dev, "Wrong NCSI state 0x%x in suspend\n", 587 nd->state); 588 } 589 590 return; 591 error: 592 nd->state = ncsi_dev_state_functional; 593 } 594 595 /* Check the VLAN filter bitmap for a set filter, and construct a 596 * "Set VLAN Filter - Disable" packet if found. 597 */ 598 static int clear_one_vid(struct ncsi_dev_priv *ndp, struct ncsi_channel *nc, 599 struct ncsi_cmd_arg *nca) 600 { 601 struct ncsi_channel_vlan_filter *ncf; 602 unsigned long flags; 603 void *bitmap; 604 int index; 605 u16 vid; 606 607 ncf = &nc->vlan_filter; 608 bitmap = &ncf->bitmap; 609 610 spin_lock_irqsave(&nc->lock, flags); 611 index = find_next_bit(bitmap, ncf->n_vids, 0); 612 if (index >= ncf->n_vids) { 613 spin_unlock_irqrestore(&nc->lock, flags); 614 return -1; 615 } 616 vid = ncf->vids[index]; 617 618 clear_bit(index, bitmap); 619 ncf->vids[index] = 0; 620 spin_unlock_irqrestore(&nc->lock, flags); 621 622 nca->type = NCSI_PKT_CMD_SVF; 623 nca->words[1] = vid; 624 /* HW filter index starts at 1 */ 625 nca->bytes[6] = index + 1; 626 nca->bytes[7] = 0x00; 627 return 0; 628 } 629 630 /* Find an outstanding VLAN tag and constuct a "Set VLAN Filter - Enable" 631 * packet. 632 */ 633 static int set_one_vid(struct ncsi_dev_priv *ndp, struct ncsi_channel *nc, 634 struct ncsi_cmd_arg *nca) 635 { 636 struct ncsi_channel_vlan_filter *ncf; 637 struct vlan_vid *vlan = NULL; 638 unsigned long flags; 639 int i, index; 640 void *bitmap; 641 u16 vid; 642 643 if (list_empty(&ndp->vlan_vids)) 644 return -1; 645 646 ncf = &nc->vlan_filter; 647 bitmap = &ncf->bitmap; 648 649 spin_lock_irqsave(&nc->lock, flags); 650 651 rcu_read_lock(); 652 list_for_each_entry_rcu(vlan, &ndp->vlan_vids, list) { 653 vid = vlan->vid; 654 for (i = 0; i < ncf->n_vids; i++) 655 if (ncf->vids[i] == vid) { 656 vid = 0; 657 break; 658 } 659 if (vid) 660 break; 661 } 662 rcu_read_unlock(); 663 664 if (!vid) { 665 /* No VLAN ID is not set */ 666 spin_unlock_irqrestore(&nc->lock, flags); 667 return -1; 668 } 669 670 index = find_next_zero_bit(bitmap, ncf->n_vids, 0); 671 if (index < 0 || index >= ncf->n_vids) { 672 netdev_err(ndp->ndev.dev, 673 "Channel %u already has all VLAN filters set\n", 674 nc->id); 675 spin_unlock_irqrestore(&nc->lock, flags); 676 return -1; 677 } 678 679 ncf->vids[index] = vid; 680 set_bit(index, bitmap); 681 spin_unlock_irqrestore(&nc->lock, flags); 682 683 nca->type = NCSI_PKT_CMD_SVF; 684 nca->words[1] = vid; 685 /* HW filter index starts at 1 */ 686 nca->bytes[6] = index + 1; 687 nca->bytes[7] = 0x01; 688 689 return 0; 690 } 691 692 #if IS_ENABLED(CONFIG_NCSI_OEM_CMD_GET_MAC) 693 694 /* NCSI OEM Command APIs */ 695 static int ncsi_oem_gma_handler_bcm(struct ncsi_cmd_arg *nca) 696 { 697 unsigned char data[NCSI_OEM_BCM_CMD_GMA_LEN]; 698 int ret = 0; 699 700 nca->payload = NCSI_OEM_BCM_CMD_GMA_LEN; 701 702 memset(data, 0, NCSI_OEM_BCM_CMD_GMA_LEN); 703 *(unsigned int *)data = ntohl(NCSI_OEM_MFR_BCM_ID); 704 data[5] = NCSI_OEM_BCM_CMD_GMA; 705 706 nca->data = data; 707 708 ret = ncsi_xmit_cmd(nca); 709 if (ret) 710 netdev_err(nca->ndp->ndev.dev, 711 "NCSI: Failed to transmit cmd 0x%x during configure\n", 712 nca->type); 713 return ret; 714 } 715 716 static int ncsi_oem_gma_handler_mlx(struct ncsi_cmd_arg *nca) 717 { 718 union { 719 u8 data_u8[NCSI_OEM_MLX_CMD_GMA_LEN]; 720 u32 data_u32[NCSI_OEM_MLX_CMD_GMA_LEN / sizeof(u32)]; 721 } u; 722 int ret = 0; 723 724 nca->payload = NCSI_OEM_MLX_CMD_GMA_LEN; 725 726 memset(&u, 0, sizeof(u)); 727 u.data_u32[0] = ntohl(NCSI_OEM_MFR_MLX_ID); 728 u.data_u8[5] = NCSI_OEM_MLX_CMD_GMA; 729 u.data_u8[6] = NCSI_OEM_MLX_CMD_GMA_PARAM; 730 731 nca->data = u.data_u8; 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_smaf_mlx(struct ncsi_cmd_arg *nca) 742 { 743 union { 744 u8 data_u8[NCSI_OEM_MLX_CMD_SMAF_LEN]; 745 u32 data_u32[NCSI_OEM_MLX_CMD_SMAF_LEN / sizeof(u32)]; 746 } u; 747 int ret = 0; 748 749 memset(&u, 0, sizeof(u)); 750 u.data_u32[0] = ntohl(NCSI_OEM_MFR_MLX_ID); 751 u.data_u8[5] = NCSI_OEM_MLX_CMD_SMAF; 752 u.data_u8[6] = NCSI_OEM_MLX_CMD_SMAF_PARAM; 753 memcpy(&u.data_u8[MLX_SMAF_MAC_ADDR_OFFSET], 754 nca->ndp->ndev.dev->dev_addr, ETH_ALEN); 755 u.data_u8[MLX_SMAF_MED_SUPPORT_OFFSET] = 756 (MLX_MC_RBT_AVL | MLX_MC_RBT_SUPPORT); 757 758 nca->payload = NCSI_OEM_MLX_CMD_SMAF_LEN; 759 nca->data = u.data_u8; 760 761 ret = ncsi_xmit_cmd(nca); 762 if (ret) 763 netdev_err(nca->ndp->ndev.dev, 764 "NCSI: Failed to transmit cmd 0x%x during probe\n", 765 nca->type); 766 return ret; 767 } 768 769 /* OEM Command handlers initialization */ 770 static struct ncsi_oem_gma_handler { 771 unsigned int mfr_id; 772 int (*handler)(struct ncsi_cmd_arg *nca); 773 } ncsi_oem_gma_handlers[] = { 774 { NCSI_OEM_MFR_BCM_ID, ncsi_oem_gma_handler_bcm }, 775 { NCSI_OEM_MFR_MLX_ID, ncsi_oem_gma_handler_mlx } 776 }; 777 778 static int ncsi_gma_handler(struct ncsi_cmd_arg *nca, unsigned int mf_id) 779 { 780 struct ncsi_oem_gma_handler *nch = NULL; 781 int i; 782 783 /* This function should only be called once, return if flag set */ 784 if (nca->ndp->gma_flag == 1) 785 return -1; 786 787 /* Find gma handler for given manufacturer id */ 788 for (i = 0; i < ARRAY_SIZE(ncsi_oem_gma_handlers); i++) { 789 if (ncsi_oem_gma_handlers[i].mfr_id == mf_id) { 790 if (ncsi_oem_gma_handlers[i].handler) 791 nch = &ncsi_oem_gma_handlers[i]; 792 break; 793 } 794 } 795 796 if (!nch) { 797 netdev_err(nca->ndp->ndev.dev, 798 "NCSI: No GMA handler available for MFR-ID (0x%x)\n", 799 mf_id); 800 return -1; 801 } 802 803 /* Get Mac address from NCSI device */ 804 return nch->handler(nca); 805 } 806 807 #endif /* CONFIG_NCSI_OEM_CMD_GET_MAC */ 808 809 /* Determine if a given channel from the channel_queue should be used for Tx */ 810 static bool ncsi_channel_is_tx(struct ncsi_dev_priv *ndp, 811 struct ncsi_channel *nc) 812 { 813 struct ncsi_channel_mode *ncm; 814 struct ncsi_channel *channel; 815 struct ncsi_package *np; 816 817 /* Check if any other channel has Tx enabled; a channel may have already 818 * been configured and removed from the channel queue. 819 */ 820 NCSI_FOR_EACH_PACKAGE(ndp, np) { 821 if (!ndp->multi_package && np != nc->package) 822 continue; 823 NCSI_FOR_EACH_CHANNEL(np, channel) { 824 ncm = &channel->modes[NCSI_MODE_TX_ENABLE]; 825 if (ncm->enable) 826 return false; 827 } 828 } 829 830 /* This channel is the preferred channel and has link */ 831 list_for_each_entry_rcu(channel, &ndp->channel_queue, link) { 832 np = channel->package; 833 if (np->preferred_channel && 834 ncsi_channel_has_link(np->preferred_channel)) { 835 return np->preferred_channel == nc; 836 } 837 } 838 839 /* This channel has link */ 840 if (ncsi_channel_has_link(nc)) 841 return true; 842 843 list_for_each_entry_rcu(channel, &ndp->channel_queue, link) 844 if (ncsi_channel_has_link(channel)) 845 return false; 846 847 /* No other channel has link; default to this one */ 848 return true; 849 } 850 851 /* Change the active Tx channel in a multi-channel setup */ 852 int ncsi_update_tx_channel(struct ncsi_dev_priv *ndp, 853 struct ncsi_package *package, 854 struct ncsi_channel *disable, 855 struct ncsi_channel *enable) 856 { 857 struct ncsi_cmd_arg nca; 858 struct ncsi_channel *nc; 859 struct ncsi_package *np; 860 int ret = 0; 861 862 if (!package->multi_channel && !ndp->multi_package) 863 netdev_warn(ndp->ndev.dev, 864 "NCSI: Trying to update Tx channel in single-channel mode\n"); 865 nca.ndp = ndp; 866 nca.req_flags = 0; 867 868 /* Find current channel with Tx enabled */ 869 NCSI_FOR_EACH_PACKAGE(ndp, np) { 870 if (disable) 871 break; 872 if (!ndp->multi_package && np != package) 873 continue; 874 875 NCSI_FOR_EACH_CHANNEL(np, nc) 876 if (nc->modes[NCSI_MODE_TX_ENABLE].enable) { 877 disable = nc; 878 break; 879 } 880 } 881 882 /* Find a suitable channel for Tx */ 883 NCSI_FOR_EACH_PACKAGE(ndp, np) { 884 if (enable) 885 break; 886 if (!ndp->multi_package && np != package) 887 continue; 888 if (!(ndp->package_whitelist & (0x1 << np->id))) 889 continue; 890 891 if (np->preferred_channel && 892 ncsi_channel_has_link(np->preferred_channel)) { 893 enable = np->preferred_channel; 894 break; 895 } 896 897 NCSI_FOR_EACH_CHANNEL(np, nc) { 898 if (!(np->channel_whitelist & 0x1 << nc->id)) 899 continue; 900 if (nc->state != NCSI_CHANNEL_ACTIVE) 901 continue; 902 if (ncsi_channel_has_link(nc)) { 903 enable = nc; 904 break; 905 } 906 } 907 } 908 909 if (disable == enable) 910 return -1; 911 912 if (!enable) 913 return -1; 914 915 if (disable) { 916 nca.channel = disable->id; 917 nca.package = disable->package->id; 918 nca.type = NCSI_PKT_CMD_DCNT; 919 ret = ncsi_xmit_cmd(&nca); 920 if (ret) 921 netdev_err(ndp->ndev.dev, 922 "Error %d sending DCNT\n", 923 ret); 924 } 925 926 netdev_info(ndp->ndev.dev, "NCSI: channel %u enables Tx\n", enable->id); 927 928 nca.channel = enable->id; 929 nca.package = enable->package->id; 930 nca.type = NCSI_PKT_CMD_ECNT; 931 ret = ncsi_xmit_cmd(&nca); 932 if (ret) 933 netdev_err(ndp->ndev.dev, 934 "Error %d sending ECNT\n", 935 ret); 936 937 return ret; 938 } 939 940 static void ncsi_configure_channel(struct ncsi_dev_priv *ndp) 941 { 942 struct ncsi_package *np = ndp->active_package; 943 struct ncsi_channel *nc = ndp->active_channel; 944 struct ncsi_channel *hot_nc = NULL; 945 struct ncsi_dev *nd = &ndp->ndev; 946 struct net_device *dev = nd->dev; 947 struct ncsi_cmd_arg nca; 948 unsigned char index; 949 unsigned long flags; 950 int ret; 951 952 nca.ndp = ndp; 953 nca.req_flags = NCSI_REQ_FLAG_EVENT_DRIVEN; 954 switch (nd->state) { 955 case ncsi_dev_state_config: 956 case ncsi_dev_state_config_sp: 957 ndp->pending_req_num = 1; 958 959 /* Select the specific package */ 960 nca.type = NCSI_PKT_CMD_SP; 961 if (ndp->flags & NCSI_DEV_HWA) 962 nca.bytes[0] = 0; 963 else 964 nca.bytes[0] = 1; 965 nca.package = np->id; 966 nca.channel = NCSI_RESERVED_CHANNEL; 967 ret = ncsi_xmit_cmd(&nca); 968 if (ret) { 969 netdev_err(ndp->ndev.dev, 970 "NCSI: Failed to transmit CMD_SP\n"); 971 goto error; 972 } 973 974 nd->state = ncsi_dev_state_config_cis; 975 break; 976 case ncsi_dev_state_config_cis: 977 ndp->pending_req_num = 1; 978 979 /* Clear initial state */ 980 nca.type = NCSI_PKT_CMD_CIS; 981 nca.package = np->id; 982 nca.channel = nc->id; 983 ret = ncsi_xmit_cmd(&nca); 984 if (ret) { 985 netdev_err(ndp->ndev.dev, 986 "NCSI: Failed to transmit CMD_CIS\n"); 987 goto error; 988 } 989 990 nd->state = ncsi_dev_state_config_oem_gma; 991 break; 992 case ncsi_dev_state_config_oem_gma: 993 nd->state = ncsi_dev_state_config_clear_vids; 994 ret = -1; 995 996 #if IS_ENABLED(CONFIG_NCSI_OEM_CMD_GET_MAC) 997 nca.type = NCSI_PKT_CMD_OEM; 998 nca.package = np->id; 999 nca.channel = nc->id; 1000 ndp->pending_req_num = 1; 1001 ret = ncsi_gma_handler(&nca, nc->version.mf_id); 1002 #endif /* CONFIG_NCSI_OEM_CMD_GET_MAC */ 1003 1004 if (ret < 0) 1005 schedule_work(&ndp->work); 1006 1007 break; 1008 case ncsi_dev_state_config_clear_vids: 1009 case ncsi_dev_state_config_svf: 1010 case ncsi_dev_state_config_ev: 1011 case ncsi_dev_state_config_sma: 1012 case ncsi_dev_state_config_ebf: 1013 case ncsi_dev_state_config_dgmf: 1014 case ncsi_dev_state_config_ecnt: 1015 case ncsi_dev_state_config_ec: 1016 case ncsi_dev_state_config_ae: 1017 case ncsi_dev_state_config_gls: 1018 ndp->pending_req_num = 1; 1019 1020 nca.package = np->id; 1021 nca.channel = nc->id; 1022 1023 /* Clear any active filters on the channel before setting */ 1024 if (nd->state == ncsi_dev_state_config_clear_vids) { 1025 ret = clear_one_vid(ndp, nc, &nca); 1026 if (ret) { 1027 nd->state = ncsi_dev_state_config_svf; 1028 schedule_work(&ndp->work); 1029 break; 1030 } 1031 /* Repeat */ 1032 nd->state = ncsi_dev_state_config_clear_vids; 1033 /* Add known VLAN tags to the filter */ 1034 } else if (nd->state == ncsi_dev_state_config_svf) { 1035 ret = set_one_vid(ndp, nc, &nca); 1036 if (ret) { 1037 nd->state = ncsi_dev_state_config_ev; 1038 schedule_work(&ndp->work); 1039 break; 1040 } 1041 /* Repeat */ 1042 nd->state = ncsi_dev_state_config_svf; 1043 /* Enable/Disable the VLAN filter */ 1044 } else if (nd->state == ncsi_dev_state_config_ev) { 1045 if (list_empty(&ndp->vlan_vids)) { 1046 nca.type = NCSI_PKT_CMD_DV; 1047 } else { 1048 nca.type = NCSI_PKT_CMD_EV; 1049 nca.bytes[3] = NCSI_CAP_VLAN_NO; 1050 } 1051 nd->state = ncsi_dev_state_config_sma; 1052 } else if (nd->state == ncsi_dev_state_config_sma) { 1053 /* Use first entry in unicast filter table. Note that 1054 * the MAC filter table starts from entry 1 instead of 1055 * 0. 1056 */ 1057 nca.type = NCSI_PKT_CMD_SMA; 1058 for (index = 0; index < 6; index++) 1059 nca.bytes[index] = dev->dev_addr[index]; 1060 nca.bytes[6] = 0x1; 1061 nca.bytes[7] = 0x1; 1062 nd->state = ncsi_dev_state_config_ebf; 1063 } else if (nd->state == ncsi_dev_state_config_ebf) { 1064 nca.type = NCSI_PKT_CMD_EBF; 1065 nca.dwords[0] = nc->caps[NCSI_CAP_BC].cap; 1066 /* if multicast global filtering is supported then 1067 * disable it so that all multicast packet will be 1068 * forwarded to management controller 1069 */ 1070 if (nc->caps[NCSI_CAP_GENERIC].cap & 1071 NCSI_CAP_GENERIC_MC) 1072 nd->state = ncsi_dev_state_config_dgmf; 1073 else if (ncsi_channel_is_tx(ndp, nc)) 1074 nd->state = ncsi_dev_state_config_ecnt; 1075 else 1076 nd->state = ncsi_dev_state_config_ec; 1077 } else if (nd->state == ncsi_dev_state_config_dgmf) { 1078 nca.type = NCSI_PKT_CMD_DGMF; 1079 if (ncsi_channel_is_tx(ndp, nc)) 1080 nd->state = ncsi_dev_state_config_ecnt; 1081 else 1082 nd->state = ncsi_dev_state_config_ec; 1083 } else if (nd->state == ncsi_dev_state_config_ecnt) { 1084 if (np->preferred_channel && 1085 nc != np->preferred_channel) 1086 netdev_info(ndp->ndev.dev, 1087 "NCSI: Tx failed over to channel %u\n", 1088 nc->id); 1089 nca.type = NCSI_PKT_CMD_ECNT; 1090 nd->state = ncsi_dev_state_config_ec; 1091 } else if (nd->state == ncsi_dev_state_config_ec) { 1092 /* Enable AEN if it's supported */ 1093 nca.type = NCSI_PKT_CMD_EC; 1094 nd->state = ncsi_dev_state_config_ae; 1095 if (!(nc->caps[NCSI_CAP_AEN].cap & NCSI_CAP_AEN_MASK)) 1096 nd->state = ncsi_dev_state_config_gls; 1097 } else if (nd->state == ncsi_dev_state_config_ae) { 1098 nca.type = NCSI_PKT_CMD_AE; 1099 nca.bytes[0] = 0; 1100 nca.dwords[1] = nc->caps[NCSI_CAP_AEN].cap; 1101 nd->state = ncsi_dev_state_config_gls; 1102 } else if (nd->state == ncsi_dev_state_config_gls) { 1103 nca.type = NCSI_PKT_CMD_GLS; 1104 nd->state = ncsi_dev_state_config_done; 1105 } 1106 1107 ret = ncsi_xmit_cmd(&nca); 1108 if (ret) { 1109 netdev_err(ndp->ndev.dev, 1110 "NCSI: Failed to transmit CMD %x\n", 1111 nca.type); 1112 goto error; 1113 } 1114 break; 1115 case ncsi_dev_state_config_done: 1116 netdev_dbg(ndp->ndev.dev, "NCSI: channel %u config done\n", 1117 nc->id); 1118 spin_lock_irqsave(&nc->lock, flags); 1119 nc->state = NCSI_CHANNEL_ACTIVE; 1120 1121 if (ndp->flags & NCSI_DEV_RESET) { 1122 /* A reset event happened during config, start it now */ 1123 nc->reconfigure_needed = false; 1124 spin_unlock_irqrestore(&nc->lock, flags); 1125 ncsi_reset_dev(nd); 1126 break; 1127 } 1128 1129 if (nc->reconfigure_needed) { 1130 /* This channel's configuration has been updated 1131 * part-way during the config state - start the 1132 * channel configuration over 1133 */ 1134 nc->reconfigure_needed = false; 1135 nc->state = NCSI_CHANNEL_INACTIVE; 1136 spin_unlock_irqrestore(&nc->lock, flags); 1137 1138 spin_lock_irqsave(&ndp->lock, flags); 1139 list_add_tail_rcu(&nc->link, &ndp->channel_queue); 1140 spin_unlock_irqrestore(&ndp->lock, flags); 1141 1142 netdev_dbg(dev, "Dirty NCSI channel state reset\n"); 1143 ncsi_process_next_channel(ndp); 1144 break; 1145 } 1146 1147 if (nc->modes[NCSI_MODE_LINK].data[2] & 0x1) { 1148 hot_nc = nc; 1149 } else { 1150 hot_nc = NULL; 1151 netdev_dbg(ndp->ndev.dev, 1152 "NCSI: channel %u link down after config\n", 1153 nc->id); 1154 } 1155 spin_unlock_irqrestore(&nc->lock, flags); 1156 1157 /* Update the hot channel */ 1158 spin_lock_irqsave(&ndp->lock, flags); 1159 ndp->hot_channel = hot_nc; 1160 spin_unlock_irqrestore(&ndp->lock, flags); 1161 1162 ncsi_start_channel_monitor(nc); 1163 ncsi_process_next_channel(ndp); 1164 break; 1165 default: 1166 netdev_alert(dev, "Wrong NCSI state 0x%x in config\n", 1167 nd->state); 1168 } 1169 1170 return; 1171 1172 error: 1173 ncsi_report_link(ndp, true); 1174 } 1175 1176 static int ncsi_choose_active_channel(struct ncsi_dev_priv *ndp) 1177 { 1178 struct ncsi_channel *nc, *found, *hot_nc; 1179 struct ncsi_channel_mode *ncm; 1180 unsigned long flags, cflags; 1181 struct ncsi_package *np; 1182 bool with_link; 1183 1184 spin_lock_irqsave(&ndp->lock, flags); 1185 hot_nc = ndp->hot_channel; 1186 spin_unlock_irqrestore(&ndp->lock, flags); 1187 1188 /* By default the search is done once an inactive channel with up 1189 * link is found, unless a preferred channel is set. 1190 * If multi_package or multi_channel are configured all channels in the 1191 * whitelist are added to the channel queue. 1192 */ 1193 found = NULL; 1194 with_link = false; 1195 NCSI_FOR_EACH_PACKAGE(ndp, np) { 1196 if (!(ndp->package_whitelist & (0x1 << np->id))) 1197 continue; 1198 NCSI_FOR_EACH_CHANNEL(np, nc) { 1199 if (!(np->channel_whitelist & (0x1 << nc->id))) 1200 continue; 1201 1202 spin_lock_irqsave(&nc->lock, cflags); 1203 1204 if (!list_empty(&nc->link) || 1205 nc->state != NCSI_CHANNEL_INACTIVE) { 1206 spin_unlock_irqrestore(&nc->lock, cflags); 1207 continue; 1208 } 1209 1210 if (!found) 1211 found = nc; 1212 1213 if (nc == hot_nc) 1214 found = nc; 1215 1216 ncm = &nc->modes[NCSI_MODE_LINK]; 1217 if (ncm->data[2] & 0x1) { 1218 found = nc; 1219 with_link = true; 1220 } 1221 1222 /* If multi_channel is enabled configure all valid 1223 * channels whether or not they currently have link 1224 * so they will have AENs enabled. 1225 */ 1226 if (with_link || np->multi_channel) { 1227 spin_lock_irqsave(&ndp->lock, flags); 1228 list_add_tail_rcu(&nc->link, 1229 &ndp->channel_queue); 1230 spin_unlock_irqrestore(&ndp->lock, flags); 1231 1232 netdev_dbg(ndp->ndev.dev, 1233 "NCSI: Channel %u added to queue (link %s)\n", 1234 nc->id, 1235 ncm->data[2] & 0x1 ? "up" : "down"); 1236 } 1237 1238 spin_unlock_irqrestore(&nc->lock, cflags); 1239 1240 if (with_link && !np->multi_channel) 1241 break; 1242 } 1243 if (with_link && !ndp->multi_package) 1244 break; 1245 } 1246 1247 if (list_empty(&ndp->channel_queue) && found) { 1248 netdev_info(ndp->ndev.dev, 1249 "NCSI: No channel with link found, configuring channel %u\n", 1250 found->id); 1251 spin_lock_irqsave(&ndp->lock, flags); 1252 list_add_tail_rcu(&found->link, &ndp->channel_queue); 1253 spin_unlock_irqrestore(&ndp->lock, flags); 1254 } else if (!found) { 1255 netdev_warn(ndp->ndev.dev, 1256 "NCSI: No channel found to configure!\n"); 1257 ncsi_report_link(ndp, true); 1258 return -ENODEV; 1259 } 1260 1261 return ncsi_process_next_channel(ndp); 1262 } 1263 1264 static bool ncsi_check_hwa(struct ncsi_dev_priv *ndp) 1265 { 1266 struct ncsi_package *np; 1267 struct ncsi_channel *nc; 1268 unsigned int cap; 1269 bool has_channel = false; 1270 1271 /* The hardware arbitration is disabled if any one channel 1272 * doesn't support explicitly. 1273 */ 1274 NCSI_FOR_EACH_PACKAGE(ndp, np) { 1275 NCSI_FOR_EACH_CHANNEL(np, nc) { 1276 has_channel = true; 1277 1278 cap = nc->caps[NCSI_CAP_GENERIC].cap; 1279 if (!(cap & NCSI_CAP_GENERIC_HWA) || 1280 (cap & NCSI_CAP_GENERIC_HWA_MASK) != 1281 NCSI_CAP_GENERIC_HWA_SUPPORT) { 1282 ndp->flags &= ~NCSI_DEV_HWA; 1283 return false; 1284 } 1285 } 1286 } 1287 1288 if (has_channel) { 1289 ndp->flags |= NCSI_DEV_HWA; 1290 return true; 1291 } 1292 1293 ndp->flags &= ~NCSI_DEV_HWA; 1294 return false; 1295 } 1296 1297 static void ncsi_probe_channel(struct ncsi_dev_priv *ndp) 1298 { 1299 struct ncsi_dev *nd = &ndp->ndev; 1300 struct ncsi_package *np; 1301 struct ncsi_channel *nc; 1302 struct ncsi_cmd_arg nca; 1303 unsigned char index; 1304 int ret; 1305 1306 nca.ndp = ndp; 1307 nca.req_flags = NCSI_REQ_FLAG_EVENT_DRIVEN; 1308 switch (nd->state) { 1309 case ncsi_dev_state_probe: 1310 nd->state = ncsi_dev_state_probe_deselect; 1311 fallthrough; 1312 case ncsi_dev_state_probe_deselect: 1313 ndp->pending_req_num = 8; 1314 1315 /* Deselect all possible packages */ 1316 nca.type = NCSI_PKT_CMD_DP; 1317 nca.channel = NCSI_RESERVED_CHANNEL; 1318 for (index = 0; index < 8; index++) { 1319 nca.package = index; 1320 ret = ncsi_xmit_cmd(&nca); 1321 if (ret) 1322 goto error; 1323 } 1324 1325 nd->state = ncsi_dev_state_probe_package; 1326 break; 1327 case ncsi_dev_state_probe_package: 1328 ndp->pending_req_num = 1; 1329 1330 nca.type = NCSI_PKT_CMD_SP; 1331 nca.bytes[0] = 1; 1332 nca.package = ndp->package_probe_id; 1333 nca.channel = NCSI_RESERVED_CHANNEL; 1334 ret = ncsi_xmit_cmd(&nca); 1335 if (ret) 1336 goto error; 1337 nd->state = ncsi_dev_state_probe_channel; 1338 break; 1339 case ncsi_dev_state_probe_channel: 1340 ndp->active_package = ncsi_find_package(ndp, 1341 ndp->package_probe_id); 1342 if (!ndp->active_package) { 1343 /* No response */ 1344 nd->state = ncsi_dev_state_probe_dp; 1345 schedule_work(&ndp->work); 1346 break; 1347 } 1348 nd->state = ncsi_dev_state_probe_cis; 1349 if (IS_ENABLED(CONFIG_NCSI_OEM_CMD_GET_MAC) && 1350 ndp->mlx_multi_host) 1351 nd->state = ncsi_dev_state_probe_mlx_gma; 1352 1353 schedule_work(&ndp->work); 1354 break; 1355 #if IS_ENABLED(CONFIG_NCSI_OEM_CMD_GET_MAC) 1356 case ncsi_dev_state_probe_mlx_gma: 1357 ndp->pending_req_num = 1; 1358 1359 nca.type = NCSI_PKT_CMD_OEM; 1360 nca.package = ndp->active_package->id; 1361 nca.channel = 0; 1362 ret = ncsi_oem_gma_handler_mlx(&nca); 1363 if (ret) 1364 goto error; 1365 1366 nd->state = ncsi_dev_state_probe_mlx_smaf; 1367 break; 1368 case ncsi_dev_state_probe_mlx_smaf: 1369 ndp->pending_req_num = 1; 1370 1371 nca.type = NCSI_PKT_CMD_OEM; 1372 nca.package = ndp->active_package->id; 1373 nca.channel = 0; 1374 ret = ncsi_oem_smaf_mlx(&nca); 1375 if (ret) 1376 goto error; 1377 1378 nd->state = ncsi_dev_state_probe_cis; 1379 break; 1380 #endif /* CONFIG_NCSI_OEM_CMD_GET_MAC */ 1381 case ncsi_dev_state_probe_cis: 1382 ndp->pending_req_num = NCSI_RESERVED_CHANNEL; 1383 1384 /* Clear initial state */ 1385 nca.type = NCSI_PKT_CMD_CIS; 1386 nca.package = ndp->active_package->id; 1387 for (index = 0; index < NCSI_RESERVED_CHANNEL; index++) { 1388 nca.channel = index; 1389 ret = ncsi_xmit_cmd(&nca); 1390 if (ret) 1391 goto error; 1392 } 1393 1394 nd->state = ncsi_dev_state_probe_gvi; 1395 break; 1396 case ncsi_dev_state_probe_gvi: 1397 case ncsi_dev_state_probe_gc: 1398 case ncsi_dev_state_probe_gls: 1399 np = ndp->active_package; 1400 ndp->pending_req_num = np->channel_num; 1401 1402 /* Retrieve version, capability or link status */ 1403 if (nd->state == ncsi_dev_state_probe_gvi) 1404 nca.type = NCSI_PKT_CMD_GVI; 1405 else if (nd->state == ncsi_dev_state_probe_gc) 1406 nca.type = NCSI_PKT_CMD_GC; 1407 else 1408 nca.type = NCSI_PKT_CMD_GLS; 1409 1410 nca.package = np->id; 1411 NCSI_FOR_EACH_CHANNEL(np, nc) { 1412 nca.channel = nc->id; 1413 ret = ncsi_xmit_cmd(&nca); 1414 if (ret) 1415 goto error; 1416 } 1417 1418 if (nd->state == ncsi_dev_state_probe_gvi) 1419 nd->state = ncsi_dev_state_probe_gc; 1420 else if (nd->state == ncsi_dev_state_probe_gc) 1421 nd->state = ncsi_dev_state_probe_gls; 1422 else 1423 nd->state = ncsi_dev_state_probe_dp; 1424 break; 1425 case ncsi_dev_state_probe_dp: 1426 ndp->pending_req_num = 1; 1427 1428 /* Deselect the current package */ 1429 nca.type = NCSI_PKT_CMD_DP; 1430 nca.package = ndp->package_probe_id; 1431 nca.channel = NCSI_RESERVED_CHANNEL; 1432 ret = ncsi_xmit_cmd(&nca); 1433 if (ret) 1434 goto error; 1435 1436 /* Probe next package */ 1437 ndp->package_probe_id++; 1438 if (ndp->package_probe_id >= 8) { 1439 /* Probe finished */ 1440 ndp->flags |= NCSI_DEV_PROBED; 1441 break; 1442 } 1443 nd->state = ncsi_dev_state_probe_package; 1444 ndp->active_package = NULL; 1445 break; 1446 default: 1447 netdev_warn(nd->dev, "Wrong NCSI state 0x%0x in enumeration\n", 1448 nd->state); 1449 } 1450 1451 if (ndp->flags & NCSI_DEV_PROBED) { 1452 /* Check if all packages have HWA support */ 1453 ncsi_check_hwa(ndp); 1454 ncsi_choose_active_channel(ndp); 1455 } 1456 1457 return; 1458 error: 1459 netdev_err(ndp->ndev.dev, 1460 "NCSI: Failed to transmit cmd 0x%x during probe\n", 1461 nca.type); 1462 ncsi_report_link(ndp, true); 1463 } 1464 1465 static void ncsi_dev_work(struct work_struct *work) 1466 { 1467 struct ncsi_dev_priv *ndp = container_of(work, 1468 struct ncsi_dev_priv, work); 1469 struct ncsi_dev *nd = &ndp->ndev; 1470 1471 switch (nd->state & ncsi_dev_state_major) { 1472 case ncsi_dev_state_probe: 1473 ncsi_probe_channel(ndp); 1474 break; 1475 case ncsi_dev_state_suspend: 1476 ncsi_suspend_channel(ndp); 1477 break; 1478 case ncsi_dev_state_config: 1479 ncsi_configure_channel(ndp); 1480 break; 1481 default: 1482 netdev_warn(nd->dev, "Wrong NCSI state 0x%x in workqueue\n", 1483 nd->state); 1484 } 1485 } 1486 1487 int ncsi_process_next_channel(struct ncsi_dev_priv *ndp) 1488 { 1489 struct ncsi_channel *nc; 1490 int old_state; 1491 unsigned long flags; 1492 1493 spin_lock_irqsave(&ndp->lock, flags); 1494 nc = list_first_or_null_rcu(&ndp->channel_queue, 1495 struct ncsi_channel, link); 1496 if (!nc) { 1497 spin_unlock_irqrestore(&ndp->lock, flags); 1498 goto out; 1499 } 1500 1501 list_del_init(&nc->link); 1502 spin_unlock_irqrestore(&ndp->lock, flags); 1503 1504 spin_lock_irqsave(&nc->lock, flags); 1505 old_state = nc->state; 1506 nc->state = NCSI_CHANNEL_INVISIBLE; 1507 spin_unlock_irqrestore(&nc->lock, flags); 1508 1509 ndp->active_channel = nc; 1510 ndp->active_package = nc->package; 1511 1512 switch (old_state) { 1513 case NCSI_CHANNEL_INACTIVE: 1514 ndp->ndev.state = ncsi_dev_state_config; 1515 netdev_dbg(ndp->ndev.dev, "NCSI: configuring channel %u\n", 1516 nc->id); 1517 ncsi_configure_channel(ndp); 1518 break; 1519 case NCSI_CHANNEL_ACTIVE: 1520 ndp->ndev.state = ncsi_dev_state_suspend; 1521 netdev_dbg(ndp->ndev.dev, "NCSI: suspending channel %u\n", 1522 nc->id); 1523 ncsi_suspend_channel(ndp); 1524 break; 1525 default: 1526 netdev_err(ndp->ndev.dev, "Invalid state 0x%x on %d:%d\n", 1527 old_state, nc->package->id, nc->id); 1528 ncsi_report_link(ndp, false); 1529 return -EINVAL; 1530 } 1531 1532 return 0; 1533 1534 out: 1535 ndp->active_channel = NULL; 1536 ndp->active_package = NULL; 1537 if (ndp->flags & NCSI_DEV_RESHUFFLE) { 1538 ndp->flags &= ~NCSI_DEV_RESHUFFLE; 1539 return ncsi_choose_active_channel(ndp); 1540 } 1541 1542 ncsi_report_link(ndp, false); 1543 return -ENODEV; 1544 } 1545 1546 static int ncsi_kick_channels(struct ncsi_dev_priv *ndp) 1547 { 1548 struct ncsi_dev *nd = &ndp->ndev; 1549 struct ncsi_channel *nc; 1550 struct ncsi_package *np; 1551 unsigned long flags; 1552 unsigned int n = 0; 1553 1554 NCSI_FOR_EACH_PACKAGE(ndp, np) { 1555 NCSI_FOR_EACH_CHANNEL(np, nc) { 1556 spin_lock_irqsave(&nc->lock, flags); 1557 1558 /* Channels may be busy, mark dirty instead of 1559 * kicking if; 1560 * a) not ACTIVE (configured) 1561 * b) in the channel_queue (to be configured) 1562 * c) it's ndev is in the config state 1563 */ 1564 if (nc->state != NCSI_CHANNEL_ACTIVE) { 1565 if ((ndp->ndev.state & 0xff00) == 1566 ncsi_dev_state_config || 1567 !list_empty(&nc->link)) { 1568 netdev_dbg(nd->dev, 1569 "NCSI: channel %p marked dirty\n", 1570 nc); 1571 nc->reconfigure_needed = true; 1572 } 1573 spin_unlock_irqrestore(&nc->lock, flags); 1574 continue; 1575 } 1576 1577 spin_unlock_irqrestore(&nc->lock, flags); 1578 1579 ncsi_stop_channel_monitor(nc); 1580 spin_lock_irqsave(&nc->lock, flags); 1581 nc->state = NCSI_CHANNEL_INACTIVE; 1582 spin_unlock_irqrestore(&nc->lock, flags); 1583 1584 spin_lock_irqsave(&ndp->lock, flags); 1585 list_add_tail_rcu(&nc->link, &ndp->channel_queue); 1586 spin_unlock_irqrestore(&ndp->lock, flags); 1587 1588 netdev_dbg(nd->dev, "NCSI: kicked channel %p\n", nc); 1589 n++; 1590 } 1591 } 1592 1593 return n; 1594 } 1595 1596 int ncsi_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid) 1597 { 1598 struct ncsi_dev_priv *ndp; 1599 unsigned int n_vids = 0; 1600 struct vlan_vid *vlan; 1601 struct ncsi_dev *nd; 1602 bool found = false; 1603 1604 if (vid == 0) 1605 return 0; 1606 1607 nd = ncsi_find_dev(dev); 1608 if (!nd) { 1609 netdev_warn(dev, "NCSI: No net_device?\n"); 1610 return 0; 1611 } 1612 1613 ndp = TO_NCSI_DEV_PRIV(nd); 1614 1615 /* Add the VLAN id to our internal list */ 1616 list_for_each_entry_rcu(vlan, &ndp->vlan_vids, list) { 1617 n_vids++; 1618 if (vlan->vid == vid) { 1619 netdev_dbg(dev, "NCSI: vid %u already registered\n", 1620 vid); 1621 return 0; 1622 } 1623 } 1624 if (n_vids >= NCSI_MAX_VLAN_VIDS) { 1625 netdev_warn(dev, 1626 "tried to add vlan id %u but NCSI max already registered (%u)\n", 1627 vid, NCSI_MAX_VLAN_VIDS); 1628 return -ENOSPC; 1629 } 1630 1631 vlan = kzalloc(sizeof(*vlan), GFP_KERNEL); 1632 if (!vlan) 1633 return -ENOMEM; 1634 1635 vlan->proto = proto; 1636 vlan->vid = vid; 1637 list_add_rcu(&vlan->list, &ndp->vlan_vids); 1638 1639 netdev_dbg(dev, "NCSI: Added new vid %u\n", vid); 1640 1641 found = ncsi_kick_channels(ndp) != 0; 1642 1643 return found ? ncsi_process_next_channel(ndp) : 0; 1644 } 1645 EXPORT_SYMBOL_GPL(ncsi_vlan_rx_add_vid); 1646 1647 int ncsi_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid) 1648 { 1649 struct vlan_vid *vlan, *tmp; 1650 struct ncsi_dev_priv *ndp; 1651 struct ncsi_dev *nd; 1652 bool found = false; 1653 1654 if (vid == 0) 1655 return 0; 1656 1657 nd = ncsi_find_dev(dev); 1658 if (!nd) { 1659 netdev_warn(dev, "NCSI: no net_device?\n"); 1660 return 0; 1661 } 1662 1663 ndp = TO_NCSI_DEV_PRIV(nd); 1664 1665 /* Remove the VLAN id from our internal list */ 1666 list_for_each_entry_safe(vlan, tmp, &ndp->vlan_vids, list) 1667 if (vlan->vid == vid) { 1668 netdev_dbg(dev, "NCSI: vid %u found, removing\n", vid); 1669 list_del_rcu(&vlan->list); 1670 found = true; 1671 kfree(vlan); 1672 } 1673 1674 if (!found) { 1675 netdev_err(dev, "NCSI: vid %u wasn't registered!\n", vid); 1676 return -EINVAL; 1677 } 1678 1679 found = ncsi_kick_channels(ndp) != 0; 1680 1681 return found ? ncsi_process_next_channel(ndp) : 0; 1682 } 1683 EXPORT_SYMBOL_GPL(ncsi_vlan_rx_kill_vid); 1684 1685 struct ncsi_dev *ncsi_register_dev(struct net_device *dev, 1686 void (*handler)(struct ncsi_dev *ndev)) 1687 { 1688 struct ncsi_dev_priv *ndp; 1689 struct ncsi_dev *nd; 1690 struct platform_device *pdev; 1691 struct device_node *np; 1692 unsigned long flags; 1693 int i; 1694 1695 /* Check if the device has been registered or not */ 1696 nd = ncsi_find_dev(dev); 1697 if (nd) 1698 return nd; 1699 1700 /* Create NCSI device */ 1701 ndp = kzalloc(sizeof(*ndp), GFP_ATOMIC); 1702 if (!ndp) 1703 return NULL; 1704 1705 nd = &ndp->ndev; 1706 nd->state = ncsi_dev_state_registered; 1707 nd->dev = dev; 1708 nd->handler = handler; 1709 ndp->pending_req_num = 0; 1710 INIT_LIST_HEAD(&ndp->channel_queue); 1711 INIT_LIST_HEAD(&ndp->vlan_vids); 1712 INIT_WORK(&ndp->work, ncsi_dev_work); 1713 ndp->package_whitelist = UINT_MAX; 1714 1715 /* Initialize private NCSI device */ 1716 spin_lock_init(&ndp->lock); 1717 INIT_LIST_HEAD(&ndp->packages); 1718 ndp->request_id = NCSI_REQ_START_IDX; 1719 for (i = 0; i < ARRAY_SIZE(ndp->requests); i++) { 1720 ndp->requests[i].id = i; 1721 ndp->requests[i].ndp = ndp; 1722 timer_setup(&ndp->requests[i].timer, ncsi_request_timeout, 0); 1723 } 1724 1725 spin_lock_irqsave(&ncsi_dev_lock, flags); 1726 list_add_tail_rcu(&ndp->node, &ncsi_dev_list); 1727 spin_unlock_irqrestore(&ncsi_dev_lock, flags); 1728 1729 /* Register NCSI packet Rx handler */ 1730 ndp->ptype.type = cpu_to_be16(ETH_P_NCSI); 1731 ndp->ptype.func = ncsi_rcv_rsp; 1732 ndp->ptype.dev = dev; 1733 dev_add_pack(&ndp->ptype); 1734 1735 pdev = to_platform_device(dev->dev.parent); 1736 if (pdev) { 1737 np = pdev->dev.of_node; 1738 if (np && of_get_property(np, "mlx,multi-host", NULL)) 1739 ndp->mlx_multi_host = true; 1740 } 1741 1742 return nd; 1743 } 1744 EXPORT_SYMBOL_GPL(ncsi_register_dev); 1745 1746 int ncsi_start_dev(struct ncsi_dev *nd) 1747 { 1748 struct ncsi_dev_priv *ndp = TO_NCSI_DEV_PRIV(nd); 1749 1750 if (nd->state != ncsi_dev_state_registered && 1751 nd->state != ncsi_dev_state_functional) 1752 return -ENOTTY; 1753 1754 if (!(ndp->flags & NCSI_DEV_PROBED)) { 1755 ndp->package_probe_id = 0; 1756 nd->state = ncsi_dev_state_probe; 1757 schedule_work(&ndp->work); 1758 return 0; 1759 } 1760 1761 return ncsi_reset_dev(nd); 1762 } 1763 EXPORT_SYMBOL_GPL(ncsi_start_dev); 1764 1765 void ncsi_stop_dev(struct ncsi_dev *nd) 1766 { 1767 struct ncsi_dev_priv *ndp = TO_NCSI_DEV_PRIV(nd); 1768 struct ncsi_package *np; 1769 struct ncsi_channel *nc; 1770 bool chained; 1771 int old_state; 1772 unsigned long flags; 1773 1774 /* Stop the channel monitor on any active channels. Don't reset the 1775 * channel state so we know which were active when ncsi_start_dev() 1776 * is next called. 1777 */ 1778 NCSI_FOR_EACH_PACKAGE(ndp, np) { 1779 NCSI_FOR_EACH_CHANNEL(np, nc) { 1780 ncsi_stop_channel_monitor(nc); 1781 1782 spin_lock_irqsave(&nc->lock, flags); 1783 chained = !list_empty(&nc->link); 1784 old_state = nc->state; 1785 spin_unlock_irqrestore(&nc->lock, flags); 1786 1787 WARN_ON_ONCE(chained || 1788 old_state == NCSI_CHANNEL_INVISIBLE); 1789 } 1790 } 1791 1792 netdev_dbg(ndp->ndev.dev, "NCSI: Stopping device\n"); 1793 ncsi_report_link(ndp, true); 1794 } 1795 EXPORT_SYMBOL_GPL(ncsi_stop_dev); 1796 1797 int ncsi_reset_dev(struct ncsi_dev *nd) 1798 { 1799 struct ncsi_dev_priv *ndp = TO_NCSI_DEV_PRIV(nd); 1800 struct ncsi_channel *nc, *active, *tmp; 1801 struct ncsi_package *np; 1802 unsigned long flags; 1803 1804 spin_lock_irqsave(&ndp->lock, flags); 1805 1806 if (!(ndp->flags & NCSI_DEV_RESET)) { 1807 /* Haven't been called yet, check states */ 1808 switch (nd->state & ncsi_dev_state_major) { 1809 case ncsi_dev_state_registered: 1810 case ncsi_dev_state_probe: 1811 /* Not even probed yet - do nothing */ 1812 spin_unlock_irqrestore(&ndp->lock, flags); 1813 return 0; 1814 case ncsi_dev_state_suspend: 1815 case ncsi_dev_state_config: 1816 /* Wait for the channel to finish its suspend/config 1817 * operation; once it finishes it will check for 1818 * NCSI_DEV_RESET and reset the state. 1819 */ 1820 ndp->flags |= NCSI_DEV_RESET; 1821 spin_unlock_irqrestore(&ndp->lock, flags); 1822 return 0; 1823 } 1824 } else { 1825 switch (nd->state) { 1826 case ncsi_dev_state_suspend_done: 1827 case ncsi_dev_state_config_done: 1828 case ncsi_dev_state_functional: 1829 /* Ok */ 1830 break; 1831 default: 1832 /* Current reset operation happening */ 1833 spin_unlock_irqrestore(&ndp->lock, flags); 1834 return 0; 1835 } 1836 } 1837 1838 if (!list_empty(&ndp->channel_queue)) { 1839 /* Clear any channel queue we may have interrupted */ 1840 list_for_each_entry_safe(nc, tmp, &ndp->channel_queue, link) 1841 list_del_init(&nc->link); 1842 } 1843 spin_unlock_irqrestore(&ndp->lock, flags); 1844 1845 active = NULL; 1846 NCSI_FOR_EACH_PACKAGE(ndp, np) { 1847 NCSI_FOR_EACH_CHANNEL(np, nc) { 1848 spin_lock_irqsave(&nc->lock, flags); 1849 1850 if (nc->state == NCSI_CHANNEL_ACTIVE) { 1851 active = nc; 1852 nc->state = NCSI_CHANNEL_INVISIBLE; 1853 spin_unlock_irqrestore(&nc->lock, flags); 1854 ncsi_stop_channel_monitor(nc); 1855 break; 1856 } 1857 1858 spin_unlock_irqrestore(&nc->lock, flags); 1859 } 1860 if (active) 1861 break; 1862 } 1863 1864 if (!active) { 1865 /* Done */ 1866 spin_lock_irqsave(&ndp->lock, flags); 1867 ndp->flags &= ~NCSI_DEV_RESET; 1868 spin_unlock_irqrestore(&ndp->lock, flags); 1869 return ncsi_choose_active_channel(ndp); 1870 } 1871 1872 spin_lock_irqsave(&ndp->lock, flags); 1873 ndp->flags |= NCSI_DEV_RESET; 1874 ndp->active_channel = active; 1875 ndp->active_package = active->package; 1876 spin_unlock_irqrestore(&ndp->lock, flags); 1877 1878 nd->state = ncsi_dev_state_suspend; 1879 schedule_work(&ndp->work); 1880 return 0; 1881 } 1882 1883 void ncsi_unregister_dev(struct ncsi_dev *nd) 1884 { 1885 struct ncsi_dev_priv *ndp = TO_NCSI_DEV_PRIV(nd); 1886 struct ncsi_package *np, *tmp; 1887 unsigned long flags; 1888 1889 dev_remove_pack(&ndp->ptype); 1890 1891 list_for_each_entry_safe(np, tmp, &ndp->packages, node) 1892 ncsi_remove_package(np); 1893 1894 spin_lock_irqsave(&ncsi_dev_lock, flags); 1895 list_del_rcu(&ndp->node); 1896 spin_unlock_irqrestore(&ncsi_dev_lock, flags); 1897 1898 kfree(ndp); 1899 } 1900 EXPORT_SYMBOL_GPL(ncsi_unregister_dev); 1901