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 construct 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_KEEP_PHY) 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 #endif 720 721 #if IS_ENABLED(CONFIG_NCSI_OEM_CMD_GET_MAC) 722 723 /* NCSI OEM Command APIs */ 724 static int ncsi_oem_gma_handler_bcm(struct ncsi_cmd_arg *nca) 725 { 726 unsigned char data[NCSI_OEM_BCM_CMD_GMA_LEN]; 727 int ret = 0; 728 729 nca->payload = NCSI_OEM_BCM_CMD_GMA_LEN; 730 731 memset(data, 0, NCSI_OEM_BCM_CMD_GMA_LEN); 732 *(unsigned int *)data = ntohl((__force __be32)NCSI_OEM_MFR_BCM_ID); 733 data[5] = NCSI_OEM_BCM_CMD_GMA; 734 735 nca->data = data; 736 737 ret = ncsi_xmit_cmd(nca); 738 if (ret) 739 netdev_err(nca->ndp->ndev.dev, 740 "NCSI: Failed to transmit cmd 0x%x during configure\n", 741 nca->type); 742 return ret; 743 } 744 745 static int ncsi_oem_gma_handler_mlx(struct ncsi_cmd_arg *nca) 746 { 747 union { 748 u8 data_u8[NCSI_OEM_MLX_CMD_GMA_LEN]; 749 u32 data_u32[NCSI_OEM_MLX_CMD_GMA_LEN / sizeof(u32)]; 750 } u; 751 int ret = 0; 752 753 nca->payload = NCSI_OEM_MLX_CMD_GMA_LEN; 754 755 memset(&u, 0, sizeof(u)); 756 u.data_u32[0] = ntohl((__force __be32)NCSI_OEM_MFR_MLX_ID); 757 u.data_u8[5] = NCSI_OEM_MLX_CMD_GMA; 758 u.data_u8[6] = NCSI_OEM_MLX_CMD_GMA_PARAM; 759 760 nca->data = u.data_u8; 761 762 ret = ncsi_xmit_cmd(nca); 763 if (ret) 764 netdev_err(nca->ndp->ndev.dev, 765 "NCSI: Failed to transmit cmd 0x%x during configure\n", 766 nca->type); 767 return ret; 768 } 769 770 static int ncsi_oem_smaf_mlx(struct ncsi_cmd_arg *nca) 771 { 772 union { 773 u8 data_u8[NCSI_OEM_MLX_CMD_SMAF_LEN]; 774 u32 data_u32[NCSI_OEM_MLX_CMD_SMAF_LEN / sizeof(u32)]; 775 } u; 776 int ret = 0; 777 778 memset(&u, 0, sizeof(u)); 779 u.data_u32[0] = ntohl((__force __be32)NCSI_OEM_MFR_MLX_ID); 780 u.data_u8[5] = NCSI_OEM_MLX_CMD_SMAF; 781 u.data_u8[6] = NCSI_OEM_MLX_CMD_SMAF_PARAM; 782 memcpy(&u.data_u8[MLX_SMAF_MAC_ADDR_OFFSET], 783 nca->ndp->ndev.dev->dev_addr, ETH_ALEN); 784 u.data_u8[MLX_SMAF_MED_SUPPORT_OFFSET] = 785 (MLX_MC_RBT_AVL | MLX_MC_RBT_SUPPORT); 786 787 nca->payload = NCSI_OEM_MLX_CMD_SMAF_LEN; 788 nca->data = u.data_u8; 789 790 ret = ncsi_xmit_cmd(nca); 791 if (ret) 792 netdev_err(nca->ndp->ndev.dev, 793 "NCSI: Failed to transmit cmd 0x%x during probe\n", 794 nca->type); 795 return ret; 796 } 797 798 /* OEM Command handlers initialization */ 799 static struct ncsi_oem_gma_handler { 800 unsigned int mfr_id; 801 int (*handler)(struct ncsi_cmd_arg *nca); 802 } ncsi_oem_gma_handlers[] = { 803 { NCSI_OEM_MFR_BCM_ID, ncsi_oem_gma_handler_bcm }, 804 { NCSI_OEM_MFR_MLX_ID, ncsi_oem_gma_handler_mlx } 805 }; 806 807 static int ncsi_gma_handler(struct ncsi_cmd_arg *nca, unsigned int mf_id) 808 { 809 struct ncsi_oem_gma_handler *nch = NULL; 810 int i; 811 812 /* This function should only be called once, return if flag set */ 813 if (nca->ndp->gma_flag == 1) 814 return -1; 815 816 /* Find gma handler for given manufacturer id */ 817 for (i = 0; i < ARRAY_SIZE(ncsi_oem_gma_handlers); i++) { 818 if (ncsi_oem_gma_handlers[i].mfr_id == mf_id) { 819 if (ncsi_oem_gma_handlers[i].handler) 820 nch = &ncsi_oem_gma_handlers[i]; 821 break; 822 } 823 } 824 825 if (!nch) { 826 netdev_err(nca->ndp->ndev.dev, 827 "NCSI: No GMA handler available for MFR-ID (0x%x)\n", 828 mf_id); 829 return -1; 830 } 831 832 /* Get Mac address from NCSI device */ 833 return nch->handler(nca); 834 } 835 836 #endif /* CONFIG_NCSI_OEM_CMD_GET_MAC */ 837 838 /* Determine if a given channel from the channel_queue should be used for Tx */ 839 static bool ncsi_channel_is_tx(struct ncsi_dev_priv *ndp, 840 struct ncsi_channel *nc) 841 { 842 struct ncsi_channel_mode *ncm; 843 struct ncsi_channel *channel; 844 struct ncsi_package *np; 845 846 /* Check if any other channel has Tx enabled; a channel may have already 847 * been configured and removed from the channel queue. 848 */ 849 NCSI_FOR_EACH_PACKAGE(ndp, np) { 850 if (!ndp->multi_package && np != nc->package) 851 continue; 852 NCSI_FOR_EACH_CHANNEL(np, channel) { 853 ncm = &channel->modes[NCSI_MODE_TX_ENABLE]; 854 if (ncm->enable) 855 return false; 856 } 857 } 858 859 /* This channel is the preferred channel and has link */ 860 list_for_each_entry_rcu(channel, &ndp->channel_queue, link) { 861 np = channel->package; 862 if (np->preferred_channel && 863 ncsi_channel_has_link(np->preferred_channel)) { 864 return np->preferred_channel == nc; 865 } 866 } 867 868 /* This channel has link */ 869 if (ncsi_channel_has_link(nc)) 870 return true; 871 872 list_for_each_entry_rcu(channel, &ndp->channel_queue, link) 873 if (ncsi_channel_has_link(channel)) 874 return false; 875 876 /* No other channel has link; default to this one */ 877 return true; 878 } 879 880 /* Change the active Tx channel in a multi-channel setup */ 881 int ncsi_update_tx_channel(struct ncsi_dev_priv *ndp, 882 struct ncsi_package *package, 883 struct ncsi_channel *disable, 884 struct ncsi_channel *enable) 885 { 886 struct ncsi_cmd_arg nca; 887 struct ncsi_channel *nc; 888 struct ncsi_package *np; 889 int ret = 0; 890 891 if (!package->multi_channel && !ndp->multi_package) 892 netdev_warn(ndp->ndev.dev, 893 "NCSI: Trying to update Tx channel in single-channel mode\n"); 894 nca.ndp = ndp; 895 nca.req_flags = 0; 896 897 /* Find current channel with Tx enabled */ 898 NCSI_FOR_EACH_PACKAGE(ndp, np) { 899 if (disable) 900 break; 901 if (!ndp->multi_package && np != package) 902 continue; 903 904 NCSI_FOR_EACH_CHANNEL(np, nc) 905 if (nc->modes[NCSI_MODE_TX_ENABLE].enable) { 906 disable = nc; 907 break; 908 } 909 } 910 911 /* Find a suitable channel for Tx */ 912 NCSI_FOR_EACH_PACKAGE(ndp, np) { 913 if (enable) 914 break; 915 if (!ndp->multi_package && np != package) 916 continue; 917 if (!(ndp->package_whitelist & (0x1 << np->id))) 918 continue; 919 920 if (np->preferred_channel && 921 ncsi_channel_has_link(np->preferred_channel)) { 922 enable = np->preferred_channel; 923 break; 924 } 925 926 NCSI_FOR_EACH_CHANNEL(np, nc) { 927 if (!(np->channel_whitelist & 0x1 << nc->id)) 928 continue; 929 if (nc->state != NCSI_CHANNEL_ACTIVE) 930 continue; 931 if (ncsi_channel_has_link(nc)) { 932 enable = nc; 933 break; 934 } 935 } 936 } 937 938 if (disable == enable) 939 return -1; 940 941 if (!enable) 942 return -1; 943 944 if (disable) { 945 nca.channel = disable->id; 946 nca.package = disable->package->id; 947 nca.type = NCSI_PKT_CMD_DCNT; 948 ret = ncsi_xmit_cmd(&nca); 949 if (ret) 950 netdev_err(ndp->ndev.dev, 951 "Error %d sending DCNT\n", 952 ret); 953 } 954 955 netdev_info(ndp->ndev.dev, "NCSI: channel %u enables Tx\n", enable->id); 956 957 nca.channel = enable->id; 958 nca.package = enable->package->id; 959 nca.type = NCSI_PKT_CMD_ECNT; 960 ret = ncsi_xmit_cmd(&nca); 961 if (ret) 962 netdev_err(ndp->ndev.dev, 963 "Error %d sending ECNT\n", 964 ret); 965 966 return ret; 967 } 968 969 static void ncsi_configure_channel(struct ncsi_dev_priv *ndp) 970 { 971 struct ncsi_package *np = ndp->active_package; 972 struct ncsi_channel *nc = ndp->active_channel; 973 struct ncsi_channel *hot_nc = NULL; 974 struct ncsi_dev *nd = &ndp->ndev; 975 struct net_device *dev = nd->dev; 976 struct ncsi_cmd_arg nca; 977 unsigned char index; 978 unsigned long flags; 979 int ret; 980 981 nca.ndp = ndp; 982 nca.req_flags = NCSI_REQ_FLAG_EVENT_DRIVEN; 983 switch (nd->state) { 984 case ncsi_dev_state_config: 985 case ncsi_dev_state_config_sp: 986 ndp->pending_req_num = 1; 987 988 /* Select the specific package */ 989 nca.type = NCSI_PKT_CMD_SP; 990 if (ndp->flags & NCSI_DEV_HWA) 991 nca.bytes[0] = 0; 992 else 993 nca.bytes[0] = 1; 994 nca.package = np->id; 995 nca.channel = NCSI_RESERVED_CHANNEL; 996 ret = ncsi_xmit_cmd(&nca); 997 if (ret) { 998 netdev_err(ndp->ndev.dev, 999 "NCSI: Failed to transmit CMD_SP\n"); 1000 goto error; 1001 } 1002 1003 nd->state = ncsi_dev_state_config_cis; 1004 break; 1005 case ncsi_dev_state_config_cis: 1006 ndp->pending_req_num = 1; 1007 1008 /* Clear initial state */ 1009 nca.type = NCSI_PKT_CMD_CIS; 1010 nca.package = np->id; 1011 nca.channel = nc->id; 1012 ret = ncsi_xmit_cmd(&nca); 1013 if (ret) { 1014 netdev_err(ndp->ndev.dev, 1015 "NCSI: Failed to transmit CMD_CIS\n"); 1016 goto error; 1017 } 1018 1019 nd->state = ncsi_dev_state_config_oem_gma; 1020 break; 1021 case ncsi_dev_state_config_oem_gma: 1022 nd->state = ncsi_dev_state_config_clear_vids; 1023 ret = -1; 1024 1025 #if IS_ENABLED(CONFIG_NCSI_OEM_CMD_GET_MAC) 1026 nca.type = NCSI_PKT_CMD_OEM; 1027 nca.package = np->id; 1028 nca.channel = nc->id; 1029 ndp->pending_req_num = 1; 1030 ret = ncsi_gma_handler(&nca, nc->version.mf_id); 1031 #endif /* CONFIG_NCSI_OEM_CMD_GET_MAC */ 1032 1033 if (ret < 0) 1034 schedule_work(&ndp->work); 1035 1036 break; 1037 case ncsi_dev_state_config_clear_vids: 1038 case ncsi_dev_state_config_svf: 1039 case ncsi_dev_state_config_ev: 1040 case ncsi_dev_state_config_sma: 1041 case ncsi_dev_state_config_ebf: 1042 case ncsi_dev_state_config_dgmf: 1043 case ncsi_dev_state_config_ecnt: 1044 case ncsi_dev_state_config_ec: 1045 case ncsi_dev_state_config_ae: 1046 case ncsi_dev_state_config_gls: 1047 ndp->pending_req_num = 1; 1048 1049 nca.package = np->id; 1050 nca.channel = nc->id; 1051 1052 /* Clear any active filters on the channel before setting */ 1053 if (nd->state == ncsi_dev_state_config_clear_vids) { 1054 ret = clear_one_vid(ndp, nc, &nca); 1055 if (ret) { 1056 nd->state = ncsi_dev_state_config_svf; 1057 schedule_work(&ndp->work); 1058 break; 1059 } 1060 /* Repeat */ 1061 nd->state = ncsi_dev_state_config_clear_vids; 1062 /* Add known VLAN tags to the filter */ 1063 } else if (nd->state == ncsi_dev_state_config_svf) { 1064 ret = set_one_vid(ndp, nc, &nca); 1065 if (ret) { 1066 nd->state = ncsi_dev_state_config_ev; 1067 schedule_work(&ndp->work); 1068 break; 1069 } 1070 /* Repeat */ 1071 nd->state = ncsi_dev_state_config_svf; 1072 /* Enable/Disable the VLAN filter */ 1073 } else if (nd->state == ncsi_dev_state_config_ev) { 1074 if (list_empty(&ndp->vlan_vids)) { 1075 nca.type = NCSI_PKT_CMD_DV; 1076 } else { 1077 nca.type = NCSI_PKT_CMD_EV; 1078 nca.bytes[3] = NCSI_CAP_VLAN_NO; 1079 } 1080 nd->state = ncsi_dev_state_config_sma; 1081 } else if (nd->state == ncsi_dev_state_config_sma) { 1082 /* Use first entry in unicast filter table. Note that 1083 * the MAC filter table starts from entry 1 instead of 1084 * 0. 1085 */ 1086 nca.type = NCSI_PKT_CMD_SMA; 1087 for (index = 0; index < 6; index++) 1088 nca.bytes[index] = dev->dev_addr[index]; 1089 nca.bytes[6] = 0x1; 1090 nca.bytes[7] = 0x1; 1091 nd->state = ncsi_dev_state_config_ebf; 1092 } else if (nd->state == ncsi_dev_state_config_ebf) { 1093 nca.type = NCSI_PKT_CMD_EBF; 1094 nca.dwords[0] = nc->caps[NCSI_CAP_BC].cap; 1095 /* if multicast global filtering is supported then 1096 * disable it so that all multicast packet will be 1097 * forwarded to management controller 1098 */ 1099 if (nc->caps[NCSI_CAP_GENERIC].cap & 1100 NCSI_CAP_GENERIC_MC) 1101 nd->state = ncsi_dev_state_config_dgmf; 1102 else if (ncsi_channel_is_tx(ndp, nc)) 1103 nd->state = ncsi_dev_state_config_ecnt; 1104 else 1105 nd->state = ncsi_dev_state_config_ec; 1106 } else if (nd->state == ncsi_dev_state_config_dgmf) { 1107 nca.type = NCSI_PKT_CMD_DGMF; 1108 if (ncsi_channel_is_tx(ndp, nc)) 1109 nd->state = ncsi_dev_state_config_ecnt; 1110 else 1111 nd->state = ncsi_dev_state_config_ec; 1112 } else if (nd->state == ncsi_dev_state_config_ecnt) { 1113 if (np->preferred_channel && 1114 nc != np->preferred_channel) 1115 netdev_info(ndp->ndev.dev, 1116 "NCSI: Tx failed over to channel %u\n", 1117 nc->id); 1118 nca.type = NCSI_PKT_CMD_ECNT; 1119 nd->state = ncsi_dev_state_config_ec; 1120 } else if (nd->state == ncsi_dev_state_config_ec) { 1121 /* Enable AEN if it's supported */ 1122 nca.type = NCSI_PKT_CMD_EC; 1123 nd->state = ncsi_dev_state_config_ae; 1124 if (!(nc->caps[NCSI_CAP_AEN].cap & NCSI_CAP_AEN_MASK)) 1125 nd->state = ncsi_dev_state_config_gls; 1126 } else if (nd->state == ncsi_dev_state_config_ae) { 1127 nca.type = NCSI_PKT_CMD_AE; 1128 nca.bytes[0] = 0; 1129 nca.dwords[1] = nc->caps[NCSI_CAP_AEN].cap; 1130 nd->state = ncsi_dev_state_config_gls; 1131 } else if (nd->state == ncsi_dev_state_config_gls) { 1132 nca.type = NCSI_PKT_CMD_GLS; 1133 nd->state = ncsi_dev_state_config_done; 1134 } 1135 1136 ret = ncsi_xmit_cmd(&nca); 1137 if (ret) { 1138 netdev_err(ndp->ndev.dev, 1139 "NCSI: Failed to transmit CMD %x\n", 1140 nca.type); 1141 goto error; 1142 } 1143 break; 1144 case ncsi_dev_state_config_done: 1145 netdev_dbg(ndp->ndev.dev, "NCSI: channel %u config done\n", 1146 nc->id); 1147 spin_lock_irqsave(&nc->lock, flags); 1148 nc->state = NCSI_CHANNEL_ACTIVE; 1149 1150 if (ndp->flags & NCSI_DEV_RESET) { 1151 /* A reset event happened during config, start it now */ 1152 nc->reconfigure_needed = false; 1153 spin_unlock_irqrestore(&nc->lock, flags); 1154 ncsi_reset_dev(nd); 1155 break; 1156 } 1157 1158 if (nc->reconfigure_needed) { 1159 /* This channel's configuration has been updated 1160 * part-way during the config state - start the 1161 * channel configuration over 1162 */ 1163 nc->reconfigure_needed = false; 1164 nc->state = NCSI_CHANNEL_INACTIVE; 1165 spin_unlock_irqrestore(&nc->lock, flags); 1166 1167 spin_lock_irqsave(&ndp->lock, flags); 1168 list_add_tail_rcu(&nc->link, &ndp->channel_queue); 1169 spin_unlock_irqrestore(&ndp->lock, flags); 1170 1171 netdev_dbg(dev, "Dirty NCSI channel state reset\n"); 1172 ncsi_process_next_channel(ndp); 1173 break; 1174 } 1175 1176 if (nc->modes[NCSI_MODE_LINK].data[2] & 0x1) { 1177 hot_nc = nc; 1178 } else { 1179 hot_nc = NULL; 1180 netdev_dbg(ndp->ndev.dev, 1181 "NCSI: channel %u link down after config\n", 1182 nc->id); 1183 } 1184 spin_unlock_irqrestore(&nc->lock, flags); 1185 1186 /* Update the hot channel */ 1187 spin_lock_irqsave(&ndp->lock, flags); 1188 ndp->hot_channel = hot_nc; 1189 spin_unlock_irqrestore(&ndp->lock, flags); 1190 1191 ncsi_start_channel_monitor(nc); 1192 ncsi_process_next_channel(ndp); 1193 break; 1194 default: 1195 netdev_alert(dev, "Wrong NCSI state 0x%x in config\n", 1196 nd->state); 1197 } 1198 1199 return; 1200 1201 error: 1202 ncsi_report_link(ndp, true); 1203 } 1204 1205 static int ncsi_choose_active_channel(struct ncsi_dev_priv *ndp) 1206 { 1207 struct ncsi_channel *nc, *found, *hot_nc; 1208 struct ncsi_channel_mode *ncm; 1209 unsigned long flags, cflags; 1210 struct ncsi_package *np; 1211 bool with_link; 1212 1213 spin_lock_irqsave(&ndp->lock, flags); 1214 hot_nc = ndp->hot_channel; 1215 spin_unlock_irqrestore(&ndp->lock, flags); 1216 1217 /* By default the search is done once an inactive channel with up 1218 * link is found, unless a preferred channel is set. 1219 * If multi_package or multi_channel are configured all channels in the 1220 * whitelist are added to the channel queue. 1221 */ 1222 found = NULL; 1223 with_link = false; 1224 NCSI_FOR_EACH_PACKAGE(ndp, np) { 1225 if (!(ndp->package_whitelist & (0x1 << np->id))) 1226 continue; 1227 NCSI_FOR_EACH_CHANNEL(np, nc) { 1228 if (!(np->channel_whitelist & (0x1 << nc->id))) 1229 continue; 1230 1231 spin_lock_irqsave(&nc->lock, cflags); 1232 1233 if (!list_empty(&nc->link) || 1234 nc->state != NCSI_CHANNEL_INACTIVE) { 1235 spin_unlock_irqrestore(&nc->lock, cflags); 1236 continue; 1237 } 1238 1239 if (!found) 1240 found = nc; 1241 1242 if (nc == hot_nc) 1243 found = nc; 1244 1245 ncm = &nc->modes[NCSI_MODE_LINK]; 1246 if (ncm->data[2] & 0x1) { 1247 found = nc; 1248 with_link = true; 1249 } 1250 1251 /* If multi_channel is enabled configure all valid 1252 * channels whether or not they currently have link 1253 * so they will have AENs enabled. 1254 */ 1255 if (with_link || np->multi_channel) { 1256 spin_lock_irqsave(&ndp->lock, flags); 1257 list_add_tail_rcu(&nc->link, 1258 &ndp->channel_queue); 1259 spin_unlock_irqrestore(&ndp->lock, flags); 1260 1261 netdev_dbg(ndp->ndev.dev, 1262 "NCSI: Channel %u added to queue (link %s)\n", 1263 nc->id, 1264 ncm->data[2] & 0x1 ? "up" : "down"); 1265 } 1266 1267 spin_unlock_irqrestore(&nc->lock, cflags); 1268 1269 if (with_link && !np->multi_channel) 1270 break; 1271 } 1272 if (with_link && !ndp->multi_package) 1273 break; 1274 } 1275 1276 if (list_empty(&ndp->channel_queue) && found) { 1277 netdev_info(ndp->ndev.dev, 1278 "NCSI: No channel with link found, configuring channel %u\n", 1279 found->id); 1280 spin_lock_irqsave(&ndp->lock, flags); 1281 list_add_tail_rcu(&found->link, &ndp->channel_queue); 1282 spin_unlock_irqrestore(&ndp->lock, flags); 1283 } else if (!found) { 1284 netdev_warn(ndp->ndev.dev, 1285 "NCSI: No channel found to configure!\n"); 1286 ncsi_report_link(ndp, true); 1287 return -ENODEV; 1288 } 1289 1290 return ncsi_process_next_channel(ndp); 1291 } 1292 1293 static bool ncsi_check_hwa(struct ncsi_dev_priv *ndp) 1294 { 1295 struct ncsi_package *np; 1296 struct ncsi_channel *nc; 1297 unsigned int cap; 1298 bool has_channel = false; 1299 1300 /* The hardware arbitration is disabled if any one channel 1301 * doesn't support explicitly. 1302 */ 1303 NCSI_FOR_EACH_PACKAGE(ndp, np) { 1304 NCSI_FOR_EACH_CHANNEL(np, nc) { 1305 has_channel = true; 1306 1307 cap = nc->caps[NCSI_CAP_GENERIC].cap; 1308 if (!(cap & NCSI_CAP_GENERIC_HWA) || 1309 (cap & NCSI_CAP_GENERIC_HWA_MASK) != 1310 NCSI_CAP_GENERIC_HWA_SUPPORT) { 1311 ndp->flags &= ~NCSI_DEV_HWA; 1312 return false; 1313 } 1314 } 1315 } 1316 1317 if (has_channel) { 1318 ndp->flags |= NCSI_DEV_HWA; 1319 return true; 1320 } 1321 1322 ndp->flags &= ~NCSI_DEV_HWA; 1323 return false; 1324 } 1325 1326 static void ncsi_probe_channel(struct ncsi_dev_priv *ndp) 1327 { 1328 struct ncsi_dev *nd = &ndp->ndev; 1329 struct ncsi_package *np; 1330 struct ncsi_channel *nc; 1331 struct ncsi_cmd_arg nca; 1332 unsigned char index; 1333 int ret; 1334 1335 nca.ndp = ndp; 1336 nca.req_flags = NCSI_REQ_FLAG_EVENT_DRIVEN; 1337 switch (nd->state) { 1338 case ncsi_dev_state_probe: 1339 nd->state = ncsi_dev_state_probe_deselect; 1340 fallthrough; 1341 case ncsi_dev_state_probe_deselect: 1342 ndp->pending_req_num = 8; 1343 1344 /* Deselect all possible packages */ 1345 nca.type = NCSI_PKT_CMD_DP; 1346 nca.channel = NCSI_RESERVED_CHANNEL; 1347 for (index = 0; index < 8; index++) { 1348 nca.package = index; 1349 ret = ncsi_xmit_cmd(&nca); 1350 if (ret) 1351 goto error; 1352 } 1353 1354 nd->state = ncsi_dev_state_probe_package; 1355 break; 1356 case ncsi_dev_state_probe_package: 1357 ndp->pending_req_num = 1; 1358 1359 nca.type = NCSI_PKT_CMD_SP; 1360 nca.bytes[0] = 1; 1361 nca.package = ndp->package_probe_id; 1362 nca.channel = NCSI_RESERVED_CHANNEL; 1363 ret = ncsi_xmit_cmd(&nca); 1364 if (ret) 1365 goto error; 1366 nd->state = ncsi_dev_state_probe_channel; 1367 break; 1368 case ncsi_dev_state_probe_channel: 1369 ndp->active_package = ncsi_find_package(ndp, 1370 ndp->package_probe_id); 1371 if (!ndp->active_package) { 1372 /* No response */ 1373 nd->state = ncsi_dev_state_probe_dp; 1374 schedule_work(&ndp->work); 1375 break; 1376 } 1377 nd->state = ncsi_dev_state_probe_cis; 1378 if (IS_ENABLED(CONFIG_NCSI_OEM_CMD_GET_MAC) && 1379 ndp->mlx_multi_host) 1380 nd->state = ncsi_dev_state_probe_mlx_gma; 1381 1382 schedule_work(&ndp->work); 1383 break; 1384 #if IS_ENABLED(CONFIG_NCSI_OEM_CMD_GET_MAC) 1385 case ncsi_dev_state_probe_mlx_gma: 1386 ndp->pending_req_num = 1; 1387 1388 nca.type = NCSI_PKT_CMD_OEM; 1389 nca.package = ndp->active_package->id; 1390 nca.channel = 0; 1391 ret = ncsi_oem_gma_handler_mlx(&nca); 1392 if (ret) 1393 goto error; 1394 1395 nd->state = ncsi_dev_state_probe_mlx_smaf; 1396 break; 1397 case ncsi_dev_state_probe_mlx_smaf: 1398 ndp->pending_req_num = 1; 1399 1400 nca.type = NCSI_PKT_CMD_OEM; 1401 nca.package = ndp->active_package->id; 1402 nca.channel = 0; 1403 ret = ncsi_oem_smaf_mlx(&nca); 1404 if (ret) 1405 goto error; 1406 1407 nd->state = ncsi_dev_state_probe_cis; 1408 break; 1409 #endif /* CONFIG_NCSI_OEM_CMD_GET_MAC */ 1410 case ncsi_dev_state_probe_cis: 1411 ndp->pending_req_num = NCSI_RESERVED_CHANNEL; 1412 1413 /* Clear initial state */ 1414 nca.type = NCSI_PKT_CMD_CIS; 1415 nca.package = ndp->active_package->id; 1416 for (index = 0; index < NCSI_RESERVED_CHANNEL; index++) { 1417 nca.channel = index; 1418 ret = ncsi_xmit_cmd(&nca); 1419 if (ret) 1420 goto error; 1421 } 1422 1423 nd->state = ncsi_dev_state_probe_gvi; 1424 if (IS_ENABLED(CONFIG_NCSI_OEM_CMD_KEEP_PHY)) 1425 nd->state = ncsi_dev_state_probe_keep_phy; 1426 break; 1427 #if IS_ENABLED(CONFIG_NCSI_OEM_CMD_KEEP_PHY) 1428 case ncsi_dev_state_probe_keep_phy: 1429 ndp->pending_req_num = 1; 1430 1431 nca.type = NCSI_PKT_CMD_OEM; 1432 nca.package = ndp->active_package->id; 1433 nca.channel = 0; 1434 ret = ncsi_oem_keep_phy_intel(&nca); 1435 if (ret) 1436 goto error; 1437 1438 nd->state = ncsi_dev_state_probe_gvi; 1439 break; 1440 #endif /* CONFIG_NCSI_OEM_CMD_KEEP_PHY */ 1441 case ncsi_dev_state_probe_gvi: 1442 case ncsi_dev_state_probe_gc: 1443 case ncsi_dev_state_probe_gls: 1444 np = ndp->active_package; 1445 ndp->pending_req_num = np->channel_num; 1446 1447 /* Retrieve version, capability or link status */ 1448 if (nd->state == ncsi_dev_state_probe_gvi) 1449 nca.type = NCSI_PKT_CMD_GVI; 1450 else if (nd->state == ncsi_dev_state_probe_gc) 1451 nca.type = NCSI_PKT_CMD_GC; 1452 else 1453 nca.type = NCSI_PKT_CMD_GLS; 1454 1455 nca.package = np->id; 1456 NCSI_FOR_EACH_CHANNEL(np, nc) { 1457 nca.channel = nc->id; 1458 ret = ncsi_xmit_cmd(&nca); 1459 if (ret) 1460 goto error; 1461 } 1462 1463 if (nd->state == ncsi_dev_state_probe_gvi) 1464 nd->state = ncsi_dev_state_probe_gc; 1465 else if (nd->state == ncsi_dev_state_probe_gc) 1466 nd->state = ncsi_dev_state_probe_gls; 1467 else 1468 nd->state = ncsi_dev_state_probe_dp; 1469 break; 1470 case ncsi_dev_state_probe_dp: 1471 ndp->pending_req_num = 1; 1472 1473 /* Deselect the current package */ 1474 nca.type = NCSI_PKT_CMD_DP; 1475 nca.package = ndp->package_probe_id; 1476 nca.channel = NCSI_RESERVED_CHANNEL; 1477 ret = ncsi_xmit_cmd(&nca); 1478 if (ret) 1479 goto error; 1480 1481 /* Probe next package */ 1482 ndp->package_probe_id++; 1483 if (ndp->package_probe_id >= 8) { 1484 /* Probe finished */ 1485 ndp->flags |= NCSI_DEV_PROBED; 1486 break; 1487 } 1488 nd->state = ncsi_dev_state_probe_package; 1489 ndp->active_package = NULL; 1490 break; 1491 default: 1492 netdev_warn(nd->dev, "Wrong NCSI state 0x%0x in enumeration\n", 1493 nd->state); 1494 } 1495 1496 if (ndp->flags & NCSI_DEV_PROBED) { 1497 /* Check if all packages have HWA support */ 1498 ncsi_check_hwa(ndp); 1499 ncsi_choose_active_channel(ndp); 1500 } 1501 1502 return; 1503 error: 1504 netdev_err(ndp->ndev.dev, 1505 "NCSI: Failed to transmit cmd 0x%x during probe\n", 1506 nca.type); 1507 ncsi_report_link(ndp, true); 1508 } 1509 1510 static void ncsi_dev_work(struct work_struct *work) 1511 { 1512 struct ncsi_dev_priv *ndp = container_of(work, 1513 struct ncsi_dev_priv, work); 1514 struct ncsi_dev *nd = &ndp->ndev; 1515 1516 switch (nd->state & ncsi_dev_state_major) { 1517 case ncsi_dev_state_probe: 1518 ncsi_probe_channel(ndp); 1519 break; 1520 case ncsi_dev_state_suspend: 1521 ncsi_suspend_channel(ndp); 1522 break; 1523 case ncsi_dev_state_config: 1524 ncsi_configure_channel(ndp); 1525 break; 1526 default: 1527 netdev_warn(nd->dev, "Wrong NCSI state 0x%x in workqueue\n", 1528 nd->state); 1529 } 1530 } 1531 1532 int ncsi_process_next_channel(struct ncsi_dev_priv *ndp) 1533 { 1534 struct ncsi_channel *nc; 1535 int old_state; 1536 unsigned long flags; 1537 1538 spin_lock_irqsave(&ndp->lock, flags); 1539 nc = list_first_or_null_rcu(&ndp->channel_queue, 1540 struct ncsi_channel, link); 1541 if (!nc) { 1542 spin_unlock_irqrestore(&ndp->lock, flags); 1543 goto out; 1544 } 1545 1546 list_del_init(&nc->link); 1547 spin_unlock_irqrestore(&ndp->lock, flags); 1548 1549 spin_lock_irqsave(&nc->lock, flags); 1550 old_state = nc->state; 1551 nc->state = NCSI_CHANNEL_INVISIBLE; 1552 spin_unlock_irqrestore(&nc->lock, flags); 1553 1554 ndp->active_channel = nc; 1555 ndp->active_package = nc->package; 1556 1557 switch (old_state) { 1558 case NCSI_CHANNEL_INACTIVE: 1559 ndp->ndev.state = ncsi_dev_state_config; 1560 netdev_dbg(ndp->ndev.dev, "NCSI: configuring channel %u\n", 1561 nc->id); 1562 ncsi_configure_channel(ndp); 1563 break; 1564 case NCSI_CHANNEL_ACTIVE: 1565 ndp->ndev.state = ncsi_dev_state_suspend; 1566 netdev_dbg(ndp->ndev.dev, "NCSI: suspending channel %u\n", 1567 nc->id); 1568 ncsi_suspend_channel(ndp); 1569 break; 1570 default: 1571 netdev_err(ndp->ndev.dev, "Invalid state 0x%x on %d:%d\n", 1572 old_state, nc->package->id, nc->id); 1573 ncsi_report_link(ndp, false); 1574 return -EINVAL; 1575 } 1576 1577 return 0; 1578 1579 out: 1580 ndp->active_channel = NULL; 1581 ndp->active_package = NULL; 1582 if (ndp->flags & NCSI_DEV_RESHUFFLE) { 1583 ndp->flags &= ~NCSI_DEV_RESHUFFLE; 1584 return ncsi_choose_active_channel(ndp); 1585 } 1586 1587 ncsi_report_link(ndp, false); 1588 return -ENODEV; 1589 } 1590 1591 static int ncsi_kick_channels(struct ncsi_dev_priv *ndp) 1592 { 1593 struct ncsi_dev *nd = &ndp->ndev; 1594 struct ncsi_channel *nc; 1595 struct ncsi_package *np; 1596 unsigned long flags; 1597 unsigned int n = 0; 1598 1599 NCSI_FOR_EACH_PACKAGE(ndp, np) { 1600 NCSI_FOR_EACH_CHANNEL(np, nc) { 1601 spin_lock_irqsave(&nc->lock, flags); 1602 1603 /* Channels may be busy, mark dirty instead of 1604 * kicking if; 1605 * a) not ACTIVE (configured) 1606 * b) in the channel_queue (to be configured) 1607 * c) it's ndev is in the config state 1608 */ 1609 if (nc->state != NCSI_CHANNEL_ACTIVE) { 1610 if ((ndp->ndev.state & 0xff00) == 1611 ncsi_dev_state_config || 1612 !list_empty(&nc->link)) { 1613 netdev_dbg(nd->dev, 1614 "NCSI: channel %p marked dirty\n", 1615 nc); 1616 nc->reconfigure_needed = true; 1617 } 1618 spin_unlock_irqrestore(&nc->lock, flags); 1619 continue; 1620 } 1621 1622 spin_unlock_irqrestore(&nc->lock, flags); 1623 1624 ncsi_stop_channel_monitor(nc); 1625 spin_lock_irqsave(&nc->lock, flags); 1626 nc->state = NCSI_CHANNEL_INACTIVE; 1627 spin_unlock_irqrestore(&nc->lock, flags); 1628 1629 spin_lock_irqsave(&ndp->lock, flags); 1630 list_add_tail_rcu(&nc->link, &ndp->channel_queue); 1631 spin_unlock_irqrestore(&ndp->lock, flags); 1632 1633 netdev_dbg(nd->dev, "NCSI: kicked channel %p\n", nc); 1634 n++; 1635 } 1636 } 1637 1638 return n; 1639 } 1640 1641 int ncsi_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid) 1642 { 1643 struct ncsi_dev_priv *ndp; 1644 unsigned int n_vids = 0; 1645 struct vlan_vid *vlan; 1646 struct ncsi_dev *nd; 1647 bool found = false; 1648 1649 if (vid == 0) 1650 return 0; 1651 1652 nd = ncsi_find_dev(dev); 1653 if (!nd) { 1654 netdev_warn(dev, "NCSI: No net_device?\n"); 1655 return 0; 1656 } 1657 1658 ndp = TO_NCSI_DEV_PRIV(nd); 1659 1660 /* Add the VLAN id to our internal list */ 1661 list_for_each_entry_rcu(vlan, &ndp->vlan_vids, list) { 1662 n_vids++; 1663 if (vlan->vid == vid) { 1664 netdev_dbg(dev, "NCSI: vid %u already registered\n", 1665 vid); 1666 return 0; 1667 } 1668 } 1669 if (n_vids >= NCSI_MAX_VLAN_VIDS) { 1670 netdev_warn(dev, 1671 "tried to add vlan id %u but NCSI max already registered (%u)\n", 1672 vid, NCSI_MAX_VLAN_VIDS); 1673 return -ENOSPC; 1674 } 1675 1676 vlan = kzalloc(sizeof(*vlan), GFP_KERNEL); 1677 if (!vlan) 1678 return -ENOMEM; 1679 1680 vlan->proto = proto; 1681 vlan->vid = vid; 1682 list_add_rcu(&vlan->list, &ndp->vlan_vids); 1683 1684 netdev_dbg(dev, "NCSI: Added new vid %u\n", vid); 1685 1686 found = ncsi_kick_channels(ndp) != 0; 1687 1688 return found ? ncsi_process_next_channel(ndp) : 0; 1689 } 1690 EXPORT_SYMBOL_GPL(ncsi_vlan_rx_add_vid); 1691 1692 int ncsi_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid) 1693 { 1694 struct vlan_vid *vlan, *tmp; 1695 struct ncsi_dev_priv *ndp; 1696 struct ncsi_dev *nd; 1697 bool found = false; 1698 1699 if (vid == 0) 1700 return 0; 1701 1702 nd = ncsi_find_dev(dev); 1703 if (!nd) { 1704 netdev_warn(dev, "NCSI: no net_device?\n"); 1705 return 0; 1706 } 1707 1708 ndp = TO_NCSI_DEV_PRIV(nd); 1709 1710 /* Remove the VLAN id from our internal list */ 1711 list_for_each_entry_safe(vlan, tmp, &ndp->vlan_vids, list) 1712 if (vlan->vid == vid) { 1713 netdev_dbg(dev, "NCSI: vid %u found, removing\n", vid); 1714 list_del_rcu(&vlan->list); 1715 found = true; 1716 kfree(vlan); 1717 } 1718 1719 if (!found) { 1720 netdev_err(dev, "NCSI: vid %u wasn't registered!\n", vid); 1721 return -EINVAL; 1722 } 1723 1724 found = ncsi_kick_channels(ndp) != 0; 1725 1726 return found ? ncsi_process_next_channel(ndp) : 0; 1727 } 1728 EXPORT_SYMBOL_GPL(ncsi_vlan_rx_kill_vid); 1729 1730 struct ncsi_dev *ncsi_register_dev(struct net_device *dev, 1731 void (*handler)(struct ncsi_dev *ndev)) 1732 { 1733 struct ncsi_dev_priv *ndp; 1734 struct ncsi_dev *nd; 1735 struct platform_device *pdev; 1736 struct device_node *np; 1737 unsigned long flags; 1738 int i; 1739 1740 /* Check if the device has been registered or not */ 1741 nd = ncsi_find_dev(dev); 1742 if (nd) 1743 return nd; 1744 1745 /* Create NCSI device */ 1746 ndp = kzalloc(sizeof(*ndp), GFP_ATOMIC); 1747 if (!ndp) 1748 return NULL; 1749 1750 nd = &ndp->ndev; 1751 nd->state = ncsi_dev_state_registered; 1752 nd->dev = dev; 1753 nd->handler = handler; 1754 ndp->pending_req_num = 0; 1755 INIT_LIST_HEAD(&ndp->channel_queue); 1756 INIT_LIST_HEAD(&ndp->vlan_vids); 1757 INIT_WORK(&ndp->work, ncsi_dev_work); 1758 ndp->package_whitelist = UINT_MAX; 1759 1760 /* Initialize private NCSI device */ 1761 spin_lock_init(&ndp->lock); 1762 INIT_LIST_HEAD(&ndp->packages); 1763 ndp->request_id = NCSI_REQ_START_IDX; 1764 for (i = 0; i < ARRAY_SIZE(ndp->requests); i++) { 1765 ndp->requests[i].id = i; 1766 ndp->requests[i].ndp = ndp; 1767 timer_setup(&ndp->requests[i].timer, ncsi_request_timeout, 0); 1768 } 1769 1770 spin_lock_irqsave(&ncsi_dev_lock, flags); 1771 list_add_tail_rcu(&ndp->node, &ncsi_dev_list); 1772 spin_unlock_irqrestore(&ncsi_dev_lock, flags); 1773 1774 /* Register NCSI packet Rx handler */ 1775 ndp->ptype.type = cpu_to_be16(ETH_P_NCSI); 1776 ndp->ptype.func = ncsi_rcv_rsp; 1777 ndp->ptype.dev = dev; 1778 dev_add_pack(&ndp->ptype); 1779 1780 pdev = to_platform_device(dev->dev.parent); 1781 if (pdev) { 1782 np = pdev->dev.of_node; 1783 if (np && of_get_property(np, "mlx,multi-host", NULL)) 1784 ndp->mlx_multi_host = true; 1785 } 1786 1787 return nd; 1788 } 1789 EXPORT_SYMBOL_GPL(ncsi_register_dev); 1790 1791 int ncsi_start_dev(struct ncsi_dev *nd) 1792 { 1793 struct ncsi_dev_priv *ndp = TO_NCSI_DEV_PRIV(nd); 1794 1795 if (nd->state != ncsi_dev_state_registered && 1796 nd->state != ncsi_dev_state_functional) 1797 return -ENOTTY; 1798 1799 if (!(ndp->flags & NCSI_DEV_PROBED)) { 1800 ndp->package_probe_id = 0; 1801 nd->state = ncsi_dev_state_probe; 1802 schedule_work(&ndp->work); 1803 return 0; 1804 } 1805 1806 return ncsi_reset_dev(nd); 1807 } 1808 EXPORT_SYMBOL_GPL(ncsi_start_dev); 1809 1810 void ncsi_stop_dev(struct ncsi_dev *nd) 1811 { 1812 struct ncsi_dev_priv *ndp = TO_NCSI_DEV_PRIV(nd); 1813 struct ncsi_package *np; 1814 struct ncsi_channel *nc; 1815 bool chained; 1816 int old_state; 1817 unsigned long flags; 1818 1819 /* Stop the channel monitor on any active channels. Don't reset the 1820 * channel state so we know which were active when ncsi_start_dev() 1821 * is next called. 1822 */ 1823 NCSI_FOR_EACH_PACKAGE(ndp, np) { 1824 NCSI_FOR_EACH_CHANNEL(np, nc) { 1825 ncsi_stop_channel_monitor(nc); 1826 1827 spin_lock_irqsave(&nc->lock, flags); 1828 chained = !list_empty(&nc->link); 1829 old_state = nc->state; 1830 spin_unlock_irqrestore(&nc->lock, flags); 1831 1832 WARN_ON_ONCE(chained || 1833 old_state == NCSI_CHANNEL_INVISIBLE); 1834 } 1835 } 1836 1837 netdev_dbg(ndp->ndev.dev, "NCSI: Stopping device\n"); 1838 ncsi_report_link(ndp, true); 1839 } 1840 EXPORT_SYMBOL_GPL(ncsi_stop_dev); 1841 1842 int ncsi_reset_dev(struct ncsi_dev *nd) 1843 { 1844 struct ncsi_dev_priv *ndp = TO_NCSI_DEV_PRIV(nd); 1845 struct ncsi_channel *nc, *active, *tmp; 1846 struct ncsi_package *np; 1847 unsigned long flags; 1848 1849 spin_lock_irqsave(&ndp->lock, flags); 1850 1851 if (!(ndp->flags & NCSI_DEV_RESET)) { 1852 /* Haven't been called yet, check states */ 1853 switch (nd->state & ncsi_dev_state_major) { 1854 case ncsi_dev_state_registered: 1855 case ncsi_dev_state_probe: 1856 /* Not even probed yet - do nothing */ 1857 spin_unlock_irqrestore(&ndp->lock, flags); 1858 return 0; 1859 case ncsi_dev_state_suspend: 1860 case ncsi_dev_state_config: 1861 /* Wait for the channel to finish its suspend/config 1862 * operation; once it finishes it will check for 1863 * NCSI_DEV_RESET and reset the state. 1864 */ 1865 ndp->flags |= NCSI_DEV_RESET; 1866 spin_unlock_irqrestore(&ndp->lock, flags); 1867 return 0; 1868 } 1869 } else { 1870 switch (nd->state) { 1871 case ncsi_dev_state_suspend_done: 1872 case ncsi_dev_state_config_done: 1873 case ncsi_dev_state_functional: 1874 /* Ok */ 1875 break; 1876 default: 1877 /* Current reset operation happening */ 1878 spin_unlock_irqrestore(&ndp->lock, flags); 1879 return 0; 1880 } 1881 } 1882 1883 if (!list_empty(&ndp->channel_queue)) { 1884 /* Clear any channel queue we may have interrupted */ 1885 list_for_each_entry_safe(nc, tmp, &ndp->channel_queue, link) 1886 list_del_init(&nc->link); 1887 } 1888 spin_unlock_irqrestore(&ndp->lock, flags); 1889 1890 active = NULL; 1891 NCSI_FOR_EACH_PACKAGE(ndp, np) { 1892 NCSI_FOR_EACH_CHANNEL(np, nc) { 1893 spin_lock_irqsave(&nc->lock, flags); 1894 1895 if (nc->state == NCSI_CHANNEL_ACTIVE) { 1896 active = nc; 1897 nc->state = NCSI_CHANNEL_INVISIBLE; 1898 spin_unlock_irqrestore(&nc->lock, flags); 1899 ncsi_stop_channel_monitor(nc); 1900 break; 1901 } 1902 1903 spin_unlock_irqrestore(&nc->lock, flags); 1904 } 1905 if (active) 1906 break; 1907 } 1908 1909 if (!active) { 1910 /* Done */ 1911 spin_lock_irqsave(&ndp->lock, flags); 1912 ndp->flags &= ~NCSI_DEV_RESET; 1913 spin_unlock_irqrestore(&ndp->lock, flags); 1914 return ncsi_choose_active_channel(ndp); 1915 } 1916 1917 spin_lock_irqsave(&ndp->lock, flags); 1918 ndp->flags |= NCSI_DEV_RESET; 1919 ndp->active_channel = active; 1920 ndp->active_package = active->package; 1921 spin_unlock_irqrestore(&ndp->lock, flags); 1922 1923 nd->state = ncsi_dev_state_suspend; 1924 schedule_work(&ndp->work); 1925 return 0; 1926 } 1927 1928 void ncsi_unregister_dev(struct ncsi_dev *nd) 1929 { 1930 struct ncsi_dev_priv *ndp = TO_NCSI_DEV_PRIV(nd); 1931 struct ncsi_package *np, *tmp; 1932 unsigned long flags; 1933 1934 dev_remove_pack(&ndp->ptype); 1935 1936 list_for_each_entry_safe(np, tmp, &ndp->packages, node) 1937 ncsi_remove_package(np); 1938 1939 spin_lock_irqsave(&ncsi_dev_lock, flags); 1940 list_del_rcu(&ndp->node); 1941 spin_unlock_irqrestore(&ncsi_dev_lock, flags); 1942 1943 kfree(ndp); 1944 } 1945 EXPORT_SYMBOL_GPL(ncsi_unregister_dev); 1946