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_first_bit(bitmap, ncf->n_vids); 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_first_zero_bit(bitmap, ncf->n_vids); 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 static int ncsi_oem_gma_handler_intel(struct ncsi_cmd_arg *nca) 799 { 800 unsigned char data[NCSI_OEM_INTEL_CMD_GMA_LEN]; 801 int ret = 0; 802 803 nca->payload = NCSI_OEM_INTEL_CMD_GMA_LEN; 804 805 memset(data, 0, NCSI_OEM_INTEL_CMD_GMA_LEN); 806 *(unsigned int *)data = ntohl((__force __be32)NCSI_OEM_MFR_INTEL_ID); 807 data[4] = NCSI_OEM_INTEL_CMD_GMA; 808 809 nca->data = data; 810 811 ret = ncsi_xmit_cmd(nca); 812 if (ret) 813 netdev_err(nca->ndp->ndev.dev, 814 "NCSI: Failed to transmit cmd 0x%x during configure\n", 815 nca->type); 816 817 return ret; 818 } 819 820 /* OEM Command handlers initialization */ 821 static struct ncsi_oem_gma_handler { 822 unsigned int mfr_id; 823 int (*handler)(struct ncsi_cmd_arg *nca); 824 } ncsi_oem_gma_handlers[] = { 825 { NCSI_OEM_MFR_BCM_ID, ncsi_oem_gma_handler_bcm }, 826 { NCSI_OEM_MFR_MLX_ID, ncsi_oem_gma_handler_mlx }, 827 { NCSI_OEM_MFR_INTEL_ID, ncsi_oem_gma_handler_intel } 828 }; 829 830 static int ncsi_gma_handler(struct ncsi_cmd_arg *nca, unsigned int mf_id) 831 { 832 struct ncsi_oem_gma_handler *nch = NULL; 833 int i; 834 835 /* This function should only be called once, return if flag set */ 836 if (nca->ndp->gma_flag == 1) 837 return -1; 838 839 /* Find gma handler for given manufacturer id */ 840 for (i = 0; i < ARRAY_SIZE(ncsi_oem_gma_handlers); i++) { 841 if (ncsi_oem_gma_handlers[i].mfr_id == mf_id) { 842 if (ncsi_oem_gma_handlers[i].handler) 843 nch = &ncsi_oem_gma_handlers[i]; 844 break; 845 } 846 } 847 848 if (!nch) { 849 netdev_err(nca->ndp->ndev.dev, 850 "NCSI: No GMA handler available for MFR-ID (0x%x)\n", 851 mf_id); 852 return -1; 853 } 854 855 /* Get Mac address from NCSI device */ 856 return nch->handler(nca); 857 } 858 859 #endif /* CONFIG_NCSI_OEM_CMD_GET_MAC */ 860 861 /* Determine if a given channel from the channel_queue should be used for Tx */ 862 static bool ncsi_channel_is_tx(struct ncsi_dev_priv *ndp, 863 struct ncsi_channel *nc) 864 { 865 struct ncsi_channel_mode *ncm; 866 struct ncsi_channel *channel; 867 struct ncsi_package *np; 868 869 /* Check if any other channel has Tx enabled; a channel may have already 870 * been configured and removed from the channel queue. 871 */ 872 NCSI_FOR_EACH_PACKAGE(ndp, np) { 873 if (!ndp->multi_package && np != nc->package) 874 continue; 875 NCSI_FOR_EACH_CHANNEL(np, channel) { 876 ncm = &channel->modes[NCSI_MODE_TX_ENABLE]; 877 if (ncm->enable) 878 return false; 879 } 880 } 881 882 /* This channel is the preferred channel and has link */ 883 list_for_each_entry_rcu(channel, &ndp->channel_queue, link) { 884 np = channel->package; 885 if (np->preferred_channel && 886 ncsi_channel_has_link(np->preferred_channel)) { 887 return np->preferred_channel == nc; 888 } 889 } 890 891 /* This channel has link */ 892 if (ncsi_channel_has_link(nc)) 893 return true; 894 895 list_for_each_entry_rcu(channel, &ndp->channel_queue, link) 896 if (ncsi_channel_has_link(channel)) 897 return false; 898 899 /* No other channel has link; default to this one */ 900 return true; 901 } 902 903 /* Change the active Tx channel in a multi-channel setup */ 904 int ncsi_update_tx_channel(struct ncsi_dev_priv *ndp, 905 struct ncsi_package *package, 906 struct ncsi_channel *disable, 907 struct ncsi_channel *enable) 908 { 909 struct ncsi_cmd_arg nca; 910 struct ncsi_channel *nc; 911 struct ncsi_package *np; 912 int ret = 0; 913 914 if (!package->multi_channel && !ndp->multi_package) 915 netdev_warn(ndp->ndev.dev, 916 "NCSI: Trying to update Tx channel in single-channel mode\n"); 917 nca.ndp = ndp; 918 nca.req_flags = 0; 919 920 /* Find current channel with Tx enabled */ 921 NCSI_FOR_EACH_PACKAGE(ndp, np) { 922 if (disable) 923 break; 924 if (!ndp->multi_package && np != package) 925 continue; 926 927 NCSI_FOR_EACH_CHANNEL(np, nc) 928 if (nc->modes[NCSI_MODE_TX_ENABLE].enable) { 929 disable = nc; 930 break; 931 } 932 } 933 934 /* Find a suitable channel for Tx */ 935 NCSI_FOR_EACH_PACKAGE(ndp, np) { 936 if (enable) 937 break; 938 if (!ndp->multi_package && np != package) 939 continue; 940 if (!(ndp->package_whitelist & (0x1 << np->id))) 941 continue; 942 943 if (np->preferred_channel && 944 ncsi_channel_has_link(np->preferred_channel)) { 945 enable = np->preferred_channel; 946 break; 947 } 948 949 NCSI_FOR_EACH_CHANNEL(np, nc) { 950 if (!(np->channel_whitelist & 0x1 << nc->id)) 951 continue; 952 if (nc->state != NCSI_CHANNEL_ACTIVE) 953 continue; 954 if (ncsi_channel_has_link(nc)) { 955 enable = nc; 956 break; 957 } 958 } 959 } 960 961 if (disable == enable) 962 return -1; 963 964 if (!enable) 965 return -1; 966 967 if (disable) { 968 nca.channel = disable->id; 969 nca.package = disable->package->id; 970 nca.type = NCSI_PKT_CMD_DCNT; 971 ret = ncsi_xmit_cmd(&nca); 972 if (ret) 973 netdev_err(ndp->ndev.dev, 974 "Error %d sending DCNT\n", 975 ret); 976 } 977 978 netdev_info(ndp->ndev.dev, "NCSI: channel %u enables Tx\n", enable->id); 979 980 nca.channel = enable->id; 981 nca.package = enable->package->id; 982 nca.type = NCSI_PKT_CMD_ECNT; 983 ret = ncsi_xmit_cmd(&nca); 984 if (ret) 985 netdev_err(ndp->ndev.dev, 986 "Error %d sending ECNT\n", 987 ret); 988 989 return ret; 990 } 991 992 static void ncsi_configure_channel(struct ncsi_dev_priv *ndp) 993 { 994 struct ncsi_package *np = ndp->active_package; 995 struct ncsi_channel *nc = ndp->active_channel; 996 struct ncsi_channel *hot_nc = NULL; 997 struct ncsi_dev *nd = &ndp->ndev; 998 struct net_device *dev = nd->dev; 999 struct ncsi_cmd_arg nca; 1000 unsigned char index; 1001 unsigned long flags; 1002 int ret; 1003 1004 nca.ndp = ndp; 1005 nca.req_flags = NCSI_REQ_FLAG_EVENT_DRIVEN; 1006 switch (nd->state) { 1007 case ncsi_dev_state_config: 1008 case ncsi_dev_state_config_sp: 1009 ndp->pending_req_num = 1; 1010 1011 /* Select the specific package */ 1012 nca.type = NCSI_PKT_CMD_SP; 1013 if (ndp->flags & NCSI_DEV_HWA) 1014 nca.bytes[0] = 0; 1015 else 1016 nca.bytes[0] = 1; 1017 nca.package = np->id; 1018 nca.channel = NCSI_RESERVED_CHANNEL; 1019 ret = ncsi_xmit_cmd(&nca); 1020 if (ret) { 1021 netdev_err(ndp->ndev.dev, 1022 "NCSI: Failed to transmit CMD_SP\n"); 1023 goto error; 1024 } 1025 1026 nd->state = ncsi_dev_state_config_cis; 1027 break; 1028 case ncsi_dev_state_config_cis: 1029 ndp->pending_req_num = 1; 1030 1031 /* Clear initial state */ 1032 nca.type = NCSI_PKT_CMD_CIS; 1033 nca.package = np->id; 1034 nca.channel = nc->id; 1035 ret = ncsi_xmit_cmd(&nca); 1036 if (ret) { 1037 netdev_err(ndp->ndev.dev, 1038 "NCSI: Failed to transmit CMD_CIS\n"); 1039 goto error; 1040 } 1041 1042 nd->state = ncsi_dev_state_config_oem_gma; 1043 break; 1044 case ncsi_dev_state_config_oem_gma: 1045 nd->state = ncsi_dev_state_config_clear_vids; 1046 ret = -1; 1047 1048 #if IS_ENABLED(CONFIG_NCSI_OEM_CMD_GET_MAC) 1049 nca.type = NCSI_PKT_CMD_OEM; 1050 nca.package = np->id; 1051 nca.channel = nc->id; 1052 ndp->pending_req_num = 1; 1053 ret = ncsi_gma_handler(&nca, nc->version.mf_id); 1054 #endif /* CONFIG_NCSI_OEM_CMD_GET_MAC */ 1055 1056 if (ret < 0) 1057 schedule_work(&ndp->work); 1058 1059 break; 1060 case ncsi_dev_state_config_clear_vids: 1061 case ncsi_dev_state_config_svf: 1062 case ncsi_dev_state_config_ev: 1063 case ncsi_dev_state_config_sma: 1064 case ncsi_dev_state_config_ebf: 1065 case ncsi_dev_state_config_dgmf: 1066 case ncsi_dev_state_config_ecnt: 1067 case ncsi_dev_state_config_ec: 1068 case ncsi_dev_state_config_ae: 1069 case ncsi_dev_state_config_gls: 1070 ndp->pending_req_num = 1; 1071 1072 nca.package = np->id; 1073 nca.channel = nc->id; 1074 1075 /* Clear any active filters on the channel before setting */ 1076 if (nd->state == ncsi_dev_state_config_clear_vids) { 1077 ret = clear_one_vid(ndp, nc, &nca); 1078 if (ret) { 1079 nd->state = ncsi_dev_state_config_svf; 1080 schedule_work(&ndp->work); 1081 break; 1082 } 1083 /* Repeat */ 1084 nd->state = ncsi_dev_state_config_clear_vids; 1085 /* Add known VLAN tags to the filter */ 1086 } else if (nd->state == ncsi_dev_state_config_svf) { 1087 ret = set_one_vid(ndp, nc, &nca); 1088 if (ret) { 1089 nd->state = ncsi_dev_state_config_ev; 1090 schedule_work(&ndp->work); 1091 break; 1092 } 1093 /* Repeat */ 1094 nd->state = ncsi_dev_state_config_svf; 1095 /* Enable/Disable the VLAN filter */ 1096 } else if (nd->state == ncsi_dev_state_config_ev) { 1097 if (list_empty(&ndp->vlan_vids)) { 1098 nca.type = NCSI_PKT_CMD_DV; 1099 } else { 1100 nca.type = NCSI_PKT_CMD_EV; 1101 nca.bytes[3] = NCSI_CAP_VLAN_NO; 1102 } 1103 nd->state = ncsi_dev_state_config_sma; 1104 } else if (nd->state == ncsi_dev_state_config_sma) { 1105 /* Use first entry in unicast filter table. Note that 1106 * the MAC filter table starts from entry 1 instead of 1107 * 0. 1108 */ 1109 nca.type = NCSI_PKT_CMD_SMA; 1110 for (index = 0; index < 6; index++) 1111 nca.bytes[index] = dev->dev_addr[index]; 1112 nca.bytes[6] = 0x1; 1113 nca.bytes[7] = 0x1; 1114 nd->state = ncsi_dev_state_config_ebf; 1115 } else if (nd->state == ncsi_dev_state_config_ebf) { 1116 nca.type = NCSI_PKT_CMD_EBF; 1117 nca.dwords[0] = nc->caps[NCSI_CAP_BC].cap; 1118 /* if multicast global filtering is supported then 1119 * disable it so that all multicast packet will be 1120 * forwarded to management controller 1121 */ 1122 if (nc->caps[NCSI_CAP_GENERIC].cap & 1123 NCSI_CAP_GENERIC_MC) 1124 nd->state = ncsi_dev_state_config_dgmf; 1125 else if (ncsi_channel_is_tx(ndp, nc)) 1126 nd->state = ncsi_dev_state_config_ecnt; 1127 else 1128 nd->state = ncsi_dev_state_config_ec; 1129 } else if (nd->state == ncsi_dev_state_config_dgmf) { 1130 nca.type = NCSI_PKT_CMD_DGMF; 1131 if (ncsi_channel_is_tx(ndp, nc)) 1132 nd->state = ncsi_dev_state_config_ecnt; 1133 else 1134 nd->state = ncsi_dev_state_config_ec; 1135 } else if (nd->state == ncsi_dev_state_config_ecnt) { 1136 if (np->preferred_channel && 1137 nc != np->preferred_channel) 1138 netdev_info(ndp->ndev.dev, 1139 "NCSI: Tx failed over to channel %u\n", 1140 nc->id); 1141 nca.type = NCSI_PKT_CMD_ECNT; 1142 nd->state = ncsi_dev_state_config_ec; 1143 } else if (nd->state == ncsi_dev_state_config_ec) { 1144 /* Enable AEN if it's supported */ 1145 nca.type = NCSI_PKT_CMD_EC; 1146 nd->state = ncsi_dev_state_config_ae; 1147 if (!(nc->caps[NCSI_CAP_AEN].cap & NCSI_CAP_AEN_MASK)) 1148 nd->state = ncsi_dev_state_config_gls; 1149 } else if (nd->state == ncsi_dev_state_config_ae) { 1150 nca.type = NCSI_PKT_CMD_AE; 1151 nca.bytes[0] = 0; 1152 nca.dwords[1] = nc->caps[NCSI_CAP_AEN].cap; 1153 nd->state = ncsi_dev_state_config_gls; 1154 } else if (nd->state == ncsi_dev_state_config_gls) { 1155 nca.type = NCSI_PKT_CMD_GLS; 1156 nd->state = ncsi_dev_state_config_done; 1157 } 1158 1159 ret = ncsi_xmit_cmd(&nca); 1160 if (ret) { 1161 netdev_err(ndp->ndev.dev, 1162 "NCSI: Failed to transmit CMD %x\n", 1163 nca.type); 1164 goto error; 1165 } 1166 break; 1167 case ncsi_dev_state_config_done: 1168 netdev_dbg(ndp->ndev.dev, "NCSI: channel %u config done\n", 1169 nc->id); 1170 spin_lock_irqsave(&nc->lock, flags); 1171 nc->state = NCSI_CHANNEL_ACTIVE; 1172 1173 if (ndp->flags & NCSI_DEV_RESET) { 1174 /* A reset event happened during config, start it now */ 1175 nc->reconfigure_needed = false; 1176 spin_unlock_irqrestore(&nc->lock, flags); 1177 ncsi_reset_dev(nd); 1178 break; 1179 } 1180 1181 if (nc->reconfigure_needed) { 1182 /* This channel's configuration has been updated 1183 * part-way during the config state - start the 1184 * channel configuration over 1185 */ 1186 nc->reconfigure_needed = false; 1187 nc->state = NCSI_CHANNEL_INACTIVE; 1188 spin_unlock_irqrestore(&nc->lock, flags); 1189 1190 spin_lock_irqsave(&ndp->lock, flags); 1191 list_add_tail_rcu(&nc->link, &ndp->channel_queue); 1192 spin_unlock_irqrestore(&ndp->lock, flags); 1193 1194 netdev_dbg(dev, "Dirty NCSI channel state reset\n"); 1195 ncsi_process_next_channel(ndp); 1196 break; 1197 } 1198 1199 if (nc->modes[NCSI_MODE_LINK].data[2] & 0x1) { 1200 hot_nc = nc; 1201 } else { 1202 hot_nc = NULL; 1203 netdev_dbg(ndp->ndev.dev, 1204 "NCSI: channel %u link down after config\n", 1205 nc->id); 1206 } 1207 spin_unlock_irqrestore(&nc->lock, flags); 1208 1209 /* Update the hot channel */ 1210 spin_lock_irqsave(&ndp->lock, flags); 1211 ndp->hot_channel = hot_nc; 1212 spin_unlock_irqrestore(&ndp->lock, flags); 1213 1214 ncsi_start_channel_monitor(nc); 1215 ncsi_process_next_channel(ndp); 1216 break; 1217 default: 1218 netdev_alert(dev, "Wrong NCSI state 0x%x in config\n", 1219 nd->state); 1220 } 1221 1222 return; 1223 1224 error: 1225 ncsi_report_link(ndp, true); 1226 } 1227 1228 static int ncsi_choose_active_channel(struct ncsi_dev_priv *ndp) 1229 { 1230 struct ncsi_channel *nc, *found, *hot_nc; 1231 struct ncsi_channel_mode *ncm; 1232 unsigned long flags, cflags; 1233 struct ncsi_package *np; 1234 bool with_link; 1235 1236 spin_lock_irqsave(&ndp->lock, flags); 1237 hot_nc = ndp->hot_channel; 1238 spin_unlock_irqrestore(&ndp->lock, flags); 1239 1240 /* By default the search is done once an inactive channel with up 1241 * link is found, unless a preferred channel is set. 1242 * If multi_package or multi_channel are configured all channels in the 1243 * whitelist are added to the channel queue. 1244 */ 1245 found = NULL; 1246 with_link = false; 1247 NCSI_FOR_EACH_PACKAGE(ndp, np) { 1248 if (!(ndp->package_whitelist & (0x1 << np->id))) 1249 continue; 1250 NCSI_FOR_EACH_CHANNEL(np, nc) { 1251 if (!(np->channel_whitelist & (0x1 << nc->id))) 1252 continue; 1253 1254 spin_lock_irqsave(&nc->lock, cflags); 1255 1256 if (!list_empty(&nc->link) || 1257 nc->state != NCSI_CHANNEL_INACTIVE) { 1258 spin_unlock_irqrestore(&nc->lock, cflags); 1259 continue; 1260 } 1261 1262 if (!found) 1263 found = nc; 1264 1265 if (nc == hot_nc) 1266 found = nc; 1267 1268 ncm = &nc->modes[NCSI_MODE_LINK]; 1269 if (ncm->data[2] & 0x1) { 1270 found = nc; 1271 with_link = true; 1272 } 1273 1274 /* If multi_channel is enabled configure all valid 1275 * channels whether or not they currently have link 1276 * so they will have AENs enabled. 1277 */ 1278 if (with_link || np->multi_channel) { 1279 spin_lock_irqsave(&ndp->lock, flags); 1280 list_add_tail_rcu(&nc->link, 1281 &ndp->channel_queue); 1282 spin_unlock_irqrestore(&ndp->lock, flags); 1283 1284 netdev_dbg(ndp->ndev.dev, 1285 "NCSI: Channel %u added to queue (link %s)\n", 1286 nc->id, 1287 ncm->data[2] & 0x1 ? "up" : "down"); 1288 } 1289 1290 spin_unlock_irqrestore(&nc->lock, cflags); 1291 1292 if (with_link && !np->multi_channel) 1293 break; 1294 } 1295 if (with_link && !ndp->multi_package) 1296 break; 1297 } 1298 1299 if (list_empty(&ndp->channel_queue) && found) { 1300 netdev_info(ndp->ndev.dev, 1301 "NCSI: No channel with link found, configuring channel %u\n", 1302 found->id); 1303 spin_lock_irqsave(&ndp->lock, flags); 1304 list_add_tail_rcu(&found->link, &ndp->channel_queue); 1305 spin_unlock_irqrestore(&ndp->lock, flags); 1306 } else if (!found) { 1307 netdev_warn(ndp->ndev.dev, 1308 "NCSI: No channel found to configure!\n"); 1309 ncsi_report_link(ndp, true); 1310 return -ENODEV; 1311 } 1312 1313 return ncsi_process_next_channel(ndp); 1314 } 1315 1316 static bool ncsi_check_hwa(struct ncsi_dev_priv *ndp) 1317 { 1318 struct ncsi_package *np; 1319 struct ncsi_channel *nc; 1320 unsigned int cap; 1321 bool has_channel = false; 1322 1323 /* The hardware arbitration is disabled if any one channel 1324 * doesn't support explicitly. 1325 */ 1326 NCSI_FOR_EACH_PACKAGE(ndp, np) { 1327 NCSI_FOR_EACH_CHANNEL(np, nc) { 1328 has_channel = true; 1329 1330 cap = nc->caps[NCSI_CAP_GENERIC].cap; 1331 if (!(cap & NCSI_CAP_GENERIC_HWA) || 1332 (cap & NCSI_CAP_GENERIC_HWA_MASK) != 1333 NCSI_CAP_GENERIC_HWA_SUPPORT) { 1334 ndp->flags &= ~NCSI_DEV_HWA; 1335 return false; 1336 } 1337 } 1338 } 1339 1340 if (has_channel) { 1341 ndp->flags |= NCSI_DEV_HWA; 1342 return true; 1343 } 1344 1345 ndp->flags &= ~NCSI_DEV_HWA; 1346 return false; 1347 } 1348 1349 static void ncsi_probe_channel(struct ncsi_dev_priv *ndp) 1350 { 1351 struct ncsi_dev *nd = &ndp->ndev; 1352 struct ncsi_package *np; 1353 struct ncsi_channel *nc; 1354 struct ncsi_cmd_arg nca; 1355 unsigned char index; 1356 int ret; 1357 1358 nca.ndp = ndp; 1359 nca.req_flags = NCSI_REQ_FLAG_EVENT_DRIVEN; 1360 switch (nd->state) { 1361 case ncsi_dev_state_probe: 1362 nd->state = ncsi_dev_state_probe_deselect; 1363 fallthrough; 1364 case ncsi_dev_state_probe_deselect: 1365 ndp->pending_req_num = 8; 1366 1367 /* Deselect all possible packages */ 1368 nca.type = NCSI_PKT_CMD_DP; 1369 nca.channel = NCSI_RESERVED_CHANNEL; 1370 for (index = 0; index < 8; index++) { 1371 nca.package = index; 1372 ret = ncsi_xmit_cmd(&nca); 1373 if (ret) 1374 goto error; 1375 } 1376 1377 nd->state = ncsi_dev_state_probe_package; 1378 break; 1379 case ncsi_dev_state_probe_package: 1380 ndp->pending_req_num = 1; 1381 1382 nca.type = NCSI_PKT_CMD_SP; 1383 nca.bytes[0] = 1; 1384 nca.package = ndp->package_probe_id; 1385 nca.channel = NCSI_RESERVED_CHANNEL; 1386 ret = ncsi_xmit_cmd(&nca); 1387 if (ret) 1388 goto error; 1389 nd->state = ncsi_dev_state_probe_channel; 1390 break; 1391 case ncsi_dev_state_probe_channel: 1392 ndp->active_package = ncsi_find_package(ndp, 1393 ndp->package_probe_id); 1394 if (!ndp->active_package) { 1395 /* No response */ 1396 nd->state = ncsi_dev_state_probe_dp; 1397 schedule_work(&ndp->work); 1398 break; 1399 } 1400 nd->state = ncsi_dev_state_probe_cis; 1401 if (IS_ENABLED(CONFIG_NCSI_OEM_CMD_GET_MAC) && 1402 ndp->mlx_multi_host) 1403 nd->state = ncsi_dev_state_probe_mlx_gma; 1404 1405 schedule_work(&ndp->work); 1406 break; 1407 #if IS_ENABLED(CONFIG_NCSI_OEM_CMD_GET_MAC) 1408 case ncsi_dev_state_probe_mlx_gma: 1409 ndp->pending_req_num = 1; 1410 1411 nca.type = NCSI_PKT_CMD_OEM; 1412 nca.package = ndp->active_package->id; 1413 nca.channel = 0; 1414 ret = ncsi_oem_gma_handler_mlx(&nca); 1415 if (ret) 1416 goto error; 1417 1418 nd->state = ncsi_dev_state_probe_mlx_smaf; 1419 break; 1420 case ncsi_dev_state_probe_mlx_smaf: 1421 ndp->pending_req_num = 1; 1422 1423 nca.type = NCSI_PKT_CMD_OEM; 1424 nca.package = ndp->active_package->id; 1425 nca.channel = 0; 1426 ret = ncsi_oem_smaf_mlx(&nca); 1427 if (ret) 1428 goto error; 1429 1430 nd->state = ncsi_dev_state_probe_cis; 1431 break; 1432 #endif /* CONFIG_NCSI_OEM_CMD_GET_MAC */ 1433 case ncsi_dev_state_probe_cis: 1434 ndp->pending_req_num = NCSI_RESERVED_CHANNEL; 1435 1436 /* Clear initial state */ 1437 nca.type = NCSI_PKT_CMD_CIS; 1438 nca.package = ndp->active_package->id; 1439 for (index = 0; index < NCSI_RESERVED_CHANNEL; index++) { 1440 nca.channel = index; 1441 ret = ncsi_xmit_cmd(&nca); 1442 if (ret) 1443 goto error; 1444 } 1445 1446 nd->state = ncsi_dev_state_probe_gvi; 1447 if (IS_ENABLED(CONFIG_NCSI_OEM_CMD_KEEP_PHY)) 1448 nd->state = ncsi_dev_state_probe_keep_phy; 1449 break; 1450 #if IS_ENABLED(CONFIG_NCSI_OEM_CMD_KEEP_PHY) 1451 case ncsi_dev_state_probe_keep_phy: 1452 ndp->pending_req_num = 1; 1453 1454 nca.type = NCSI_PKT_CMD_OEM; 1455 nca.package = ndp->active_package->id; 1456 nca.channel = 0; 1457 ret = ncsi_oem_keep_phy_intel(&nca); 1458 if (ret) 1459 goto error; 1460 1461 nd->state = ncsi_dev_state_probe_gvi; 1462 break; 1463 #endif /* CONFIG_NCSI_OEM_CMD_KEEP_PHY */ 1464 case ncsi_dev_state_probe_gvi: 1465 case ncsi_dev_state_probe_gc: 1466 case ncsi_dev_state_probe_gls: 1467 np = ndp->active_package; 1468 ndp->pending_req_num = np->channel_num; 1469 1470 /* Retrieve version, capability or link status */ 1471 if (nd->state == ncsi_dev_state_probe_gvi) 1472 nca.type = NCSI_PKT_CMD_GVI; 1473 else if (nd->state == ncsi_dev_state_probe_gc) 1474 nca.type = NCSI_PKT_CMD_GC; 1475 else 1476 nca.type = NCSI_PKT_CMD_GLS; 1477 1478 nca.package = np->id; 1479 NCSI_FOR_EACH_CHANNEL(np, nc) { 1480 nca.channel = nc->id; 1481 ret = ncsi_xmit_cmd(&nca); 1482 if (ret) 1483 goto error; 1484 } 1485 1486 if (nd->state == ncsi_dev_state_probe_gvi) 1487 nd->state = ncsi_dev_state_probe_gc; 1488 else if (nd->state == ncsi_dev_state_probe_gc) 1489 nd->state = ncsi_dev_state_probe_gls; 1490 else 1491 nd->state = ncsi_dev_state_probe_dp; 1492 break; 1493 case ncsi_dev_state_probe_dp: 1494 ndp->pending_req_num = 1; 1495 1496 /* Deselect the current package */ 1497 nca.type = NCSI_PKT_CMD_DP; 1498 nca.package = ndp->package_probe_id; 1499 nca.channel = NCSI_RESERVED_CHANNEL; 1500 ret = ncsi_xmit_cmd(&nca); 1501 if (ret) 1502 goto error; 1503 1504 /* Probe next package */ 1505 ndp->package_probe_id++; 1506 if (ndp->package_probe_id >= 8) { 1507 /* Probe finished */ 1508 ndp->flags |= NCSI_DEV_PROBED; 1509 break; 1510 } 1511 nd->state = ncsi_dev_state_probe_package; 1512 ndp->active_package = NULL; 1513 break; 1514 default: 1515 netdev_warn(nd->dev, "Wrong NCSI state 0x%0x in enumeration\n", 1516 nd->state); 1517 } 1518 1519 if (ndp->flags & NCSI_DEV_PROBED) { 1520 /* Check if all packages have HWA support */ 1521 ncsi_check_hwa(ndp); 1522 ncsi_choose_active_channel(ndp); 1523 } 1524 1525 return; 1526 error: 1527 netdev_err(ndp->ndev.dev, 1528 "NCSI: Failed to transmit cmd 0x%x during probe\n", 1529 nca.type); 1530 ncsi_report_link(ndp, true); 1531 } 1532 1533 static void ncsi_dev_work(struct work_struct *work) 1534 { 1535 struct ncsi_dev_priv *ndp = container_of(work, 1536 struct ncsi_dev_priv, work); 1537 struct ncsi_dev *nd = &ndp->ndev; 1538 1539 switch (nd->state & ncsi_dev_state_major) { 1540 case ncsi_dev_state_probe: 1541 ncsi_probe_channel(ndp); 1542 break; 1543 case ncsi_dev_state_suspend: 1544 ncsi_suspend_channel(ndp); 1545 break; 1546 case ncsi_dev_state_config: 1547 ncsi_configure_channel(ndp); 1548 break; 1549 default: 1550 netdev_warn(nd->dev, "Wrong NCSI state 0x%x in workqueue\n", 1551 nd->state); 1552 } 1553 } 1554 1555 int ncsi_process_next_channel(struct ncsi_dev_priv *ndp) 1556 { 1557 struct ncsi_channel *nc; 1558 int old_state; 1559 unsigned long flags; 1560 1561 spin_lock_irqsave(&ndp->lock, flags); 1562 nc = list_first_or_null_rcu(&ndp->channel_queue, 1563 struct ncsi_channel, link); 1564 if (!nc) { 1565 spin_unlock_irqrestore(&ndp->lock, flags); 1566 goto out; 1567 } 1568 1569 list_del_init(&nc->link); 1570 spin_unlock_irqrestore(&ndp->lock, flags); 1571 1572 spin_lock_irqsave(&nc->lock, flags); 1573 old_state = nc->state; 1574 nc->state = NCSI_CHANNEL_INVISIBLE; 1575 spin_unlock_irqrestore(&nc->lock, flags); 1576 1577 ndp->active_channel = nc; 1578 ndp->active_package = nc->package; 1579 1580 switch (old_state) { 1581 case NCSI_CHANNEL_INACTIVE: 1582 ndp->ndev.state = ncsi_dev_state_config; 1583 netdev_dbg(ndp->ndev.dev, "NCSI: configuring channel %u\n", 1584 nc->id); 1585 ncsi_configure_channel(ndp); 1586 break; 1587 case NCSI_CHANNEL_ACTIVE: 1588 ndp->ndev.state = ncsi_dev_state_suspend; 1589 netdev_dbg(ndp->ndev.dev, "NCSI: suspending channel %u\n", 1590 nc->id); 1591 ncsi_suspend_channel(ndp); 1592 break; 1593 default: 1594 netdev_err(ndp->ndev.dev, "Invalid state 0x%x on %d:%d\n", 1595 old_state, nc->package->id, nc->id); 1596 ncsi_report_link(ndp, false); 1597 return -EINVAL; 1598 } 1599 1600 return 0; 1601 1602 out: 1603 ndp->active_channel = NULL; 1604 ndp->active_package = NULL; 1605 if (ndp->flags & NCSI_DEV_RESHUFFLE) { 1606 ndp->flags &= ~NCSI_DEV_RESHUFFLE; 1607 return ncsi_choose_active_channel(ndp); 1608 } 1609 1610 ncsi_report_link(ndp, false); 1611 return -ENODEV; 1612 } 1613 1614 static int ncsi_kick_channels(struct ncsi_dev_priv *ndp) 1615 { 1616 struct ncsi_dev *nd = &ndp->ndev; 1617 struct ncsi_channel *nc; 1618 struct ncsi_package *np; 1619 unsigned long flags; 1620 unsigned int n = 0; 1621 1622 NCSI_FOR_EACH_PACKAGE(ndp, np) { 1623 NCSI_FOR_EACH_CHANNEL(np, nc) { 1624 spin_lock_irqsave(&nc->lock, flags); 1625 1626 /* Channels may be busy, mark dirty instead of 1627 * kicking if; 1628 * a) not ACTIVE (configured) 1629 * b) in the channel_queue (to be configured) 1630 * c) it's ndev is in the config state 1631 */ 1632 if (nc->state != NCSI_CHANNEL_ACTIVE) { 1633 if ((ndp->ndev.state & 0xff00) == 1634 ncsi_dev_state_config || 1635 !list_empty(&nc->link)) { 1636 netdev_dbg(nd->dev, 1637 "NCSI: channel %p marked dirty\n", 1638 nc); 1639 nc->reconfigure_needed = true; 1640 } 1641 spin_unlock_irqrestore(&nc->lock, flags); 1642 continue; 1643 } 1644 1645 spin_unlock_irqrestore(&nc->lock, flags); 1646 1647 ncsi_stop_channel_monitor(nc); 1648 spin_lock_irqsave(&nc->lock, flags); 1649 nc->state = NCSI_CHANNEL_INACTIVE; 1650 spin_unlock_irqrestore(&nc->lock, flags); 1651 1652 spin_lock_irqsave(&ndp->lock, flags); 1653 list_add_tail_rcu(&nc->link, &ndp->channel_queue); 1654 spin_unlock_irqrestore(&ndp->lock, flags); 1655 1656 netdev_dbg(nd->dev, "NCSI: kicked channel %p\n", nc); 1657 n++; 1658 } 1659 } 1660 1661 return n; 1662 } 1663 1664 int ncsi_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid) 1665 { 1666 struct ncsi_dev_priv *ndp; 1667 unsigned int n_vids = 0; 1668 struct vlan_vid *vlan; 1669 struct ncsi_dev *nd; 1670 bool found = false; 1671 1672 if (vid == 0) 1673 return 0; 1674 1675 nd = ncsi_find_dev(dev); 1676 if (!nd) { 1677 netdev_warn(dev, "NCSI: No net_device?\n"); 1678 return 0; 1679 } 1680 1681 ndp = TO_NCSI_DEV_PRIV(nd); 1682 1683 /* Add the VLAN id to our internal list */ 1684 list_for_each_entry_rcu(vlan, &ndp->vlan_vids, list) { 1685 n_vids++; 1686 if (vlan->vid == vid) { 1687 netdev_dbg(dev, "NCSI: vid %u already registered\n", 1688 vid); 1689 return 0; 1690 } 1691 } 1692 if (n_vids >= NCSI_MAX_VLAN_VIDS) { 1693 netdev_warn(dev, 1694 "tried to add vlan id %u but NCSI max already registered (%u)\n", 1695 vid, NCSI_MAX_VLAN_VIDS); 1696 return -ENOSPC; 1697 } 1698 1699 vlan = kzalloc(sizeof(*vlan), GFP_KERNEL); 1700 if (!vlan) 1701 return -ENOMEM; 1702 1703 vlan->proto = proto; 1704 vlan->vid = vid; 1705 list_add_rcu(&vlan->list, &ndp->vlan_vids); 1706 1707 netdev_dbg(dev, "NCSI: Added new vid %u\n", vid); 1708 1709 found = ncsi_kick_channels(ndp) != 0; 1710 1711 return found ? ncsi_process_next_channel(ndp) : 0; 1712 } 1713 EXPORT_SYMBOL_GPL(ncsi_vlan_rx_add_vid); 1714 1715 int ncsi_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid) 1716 { 1717 struct vlan_vid *vlan, *tmp; 1718 struct ncsi_dev_priv *ndp; 1719 struct ncsi_dev *nd; 1720 bool found = false; 1721 1722 if (vid == 0) 1723 return 0; 1724 1725 nd = ncsi_find_dev(dev); 1726 if (!nd) { 1727 netdev_warn(dev, "NCSI: no net_device?\n"); 1728 return 0; 1729 } 1730 1731 ndp = TO_NCSI_DEV_PRIV(nd); 1732 1733 /* Remove the VLAN id from our internal list */ 1734 list_for_each_entry_safe(vlan, tmp, &ndp->vlan_vids, list) 1735 if (vlan->vid == vid) { 1736 netdev_dbg(dev, "NCSI: vid %u found, removing\n", vid); 1737 list_del_rcu(&vlan->list); 1738 found = true; 1739 kfree(vlan); 1740 } 1741 1742 if (!found) { 1743 netdev_err(dev, "NCSI: vid %u wasn't registered!\n", vid); 1744 return -EINVAL; 1745 } 1746 1747 found = ncsi_kick_channels(ndp) != 0; 1748 1749 return found ? ncsi_process_next_channel(ndp) : 0; 1750 } 1751 EXPORT_SYMBOL_GPL(ncsi_vlan_rx_kill_vid); 1752 1753 struct ncsi_dev *ncsi_register_dev(struct net_device *dev, 1754 void (*handler)(struct ncsi_dev *ndev)) 1755 { 1756 struct ncsi_dev_priv *ndp; 1757 struct ncsi_dev *nd; 1758 struct platform_device *pdev; 1759 struct device_node *np; 1760 unsigned long flags; 1761 int i; 1762 1763 /* Check if the device has been registered or not */ 1764 nd = ncsi_find_dev(dev); 1765 if (nd) 1766 return nd; 1767 1768 /* Create NCSI device */ 1769 ndp = kzalloc(sizeof(*ndp), GFP_ATOMIC); 1770 if (!ndp) 1771 return NULL; 1772 1773 nd = &ndp->ndev; 1774 nd->state = ncsi_dev_state_registered; 1775 nd->dev = dev; 1776 nd->handler = handler; 1777 ndp->pending_req_num = 0; 1778 INIT_LIST_HEAD(&ndp->channel_queue); 1779 INIT_LIST_HEAD(&ndp->vlan_vids); 1780 INIT_WORK(&ndp->work, ncsi_dev_work); 1781 ndp->package_whitelist = UINT_MAX; 1782 1783 /* Initialize private NCSI device */ 1784 spin_lock_init(&ndp->lock); 1785 INIT_LIST_HEAD(&ndp->packages); 1786 ndp->request_id = NCSI_REQ_START_IDX; 1787 for (i = 0; i < ARRAY_SIZE(ndp->requests); i++) { 1788 ndp->requests[i].id = i; 1789 ndp->requests[i].ndp = ndp; 1790 timer_setup(&ndp->requests[i].timer, ncsi_request_timeout, 0); 1791 } 1792 1793 spin_lock_irqsave(&ncsi_dev_lock, flags); 1794 list_add_tail_rcu(&ndp->node, &ncsi_dev_list); 1795 spin_unlock_irqrestore(&ncsi_dev_lock, flags); 1796 1797 /* Register NCSI packet Rx handler */ 1798 ndp->ptype.type = cpu_to_be16(ETH_P_NCSI); 1799 ndp->ptype.func = ncsi_rcv_rsp; 1800 ndp->ptype.dev = dev; 1801 dev_add_pack(&ndp->ptype); 1802 1803 pdev = to_platform_device(dev->dev.parent); 1804 if (pdev) { 1805 np = pdev->dev.of_node; 1806 if (np && (of_get_property(np, "mellanox,multi-host", NULL) || 1807 of_get_property(np, "mlx,multi-host", NULL))) 1808 ndp->mlx_multi_host = true; 1809 } 1810 1811 return nd; 1812 } 1813 EXPORT_SYMBOL_GPL(ncsi_register_dev); 1814 1815 int ncsi_start_dev(struct ncsi_dev *nd) 1816 { 1817 struct ncsi_dev_priv *ndp = TO_NCSI_DEV_PRIV(nd); 1818 1819 if (nd->state != ncsi_dev_state_registered && 1820 nd->state != ncsi_dev_state_functional) 1821 return -ENOTTY; 1822 1823 if (!(ndp->flags & NCSI_DEV_PROBED)) { 1824 ndp->package_probe_id = 0; 1825 nd->state = ncsi_dev_state_probe; 1826 schedule_work(&ndp->work); 1827 return 0; 1828 } 1829 1830 return ncsi_reset_dev(nd); 1831 } 1832 EXPORT_SYMBOL_GPL(ncsi_start_dev); 1833 1834 void ncsi_stop_dev(struct ncsi_dev *nd) 1835 { 1836 struct ncsi_dev_priv *ndp = TO_NCSI_DEV_PRIV(nd); 1837 struct ncsi_package *np; 1838 struct ncsi_channel *nc; 1839 bool chained; 1840 int old_state; 1841 unsigned long flags; 1842 1843 /* Stop the channel monitor on any active channels. Don't reset the 1844 * channel state so we know which were active when ncsi_start_dev() 1845 * is next called. 1846 */ 1847 NCSI_FOR_EACH_PACKAGE(ndp, np) { 1848 NCSI_FOR_EACH_CHANNEL(np, nc) { 1849 ncsi_stop_channel_monitor(nc); 1850 1851 spin_lock_irqsave(&nc->lock, flags); 1852 chained = !list_empty(&nc->link); 1853 old_state = nc->state; 1854 spin_unlock_irqrestore(&nc->lock, flags); 1855 1856 WARN_ON_ONCE(chained || 1857 old_state == NCSI_CHANNEL_INVISIBLE); 1858 } 1859 } 1860 1861 netdev_dbg(ndp->ndev.dev, "NCSI: Stopping device\n"); 1862 ncsi_report_link(ndp, true); 1863 } 1864 EXPORT_SYMBOL_GPL(ncsi_stop_dev); 1865 1866 int ncsi_reset_dev(struct ncsi_dev *nd) 1867 { 1868 struct ncsi_dev_priv *ndp = TO_NCSI_DEV_PRIV(nd); 1869 struct ncsi_channel *nc, *active, *tmp; 1870 struct ncsi_package *np; 1871 unsigned long flags; 1872 1873 spin_lock_irqsave(&ndp->lock, flags); 1874 1875 if (!(ndp->flags & NCSI_DEV_RESET)) { 1876 /* Haven't been called yet, check states */ 1877 switch (nd->state & ncsi_dev_state_major) { 1878 case ncsi_dev_state_registered: 1879 case ncsi_dev_state_probe: 1880 /* Not even probed yet - do nothing */ 1881 spin_unlock_irqrestore(&ndp->lock, flags); 1882 return 0; 1883 case ncsi_dev_state_suspend: 1884 case ncsi_dev_state_config: 1885 /* Wait for the channel to finish its suspend/config 1886 * operation; once it finishes it will check for 1887 * NCSI_DEV_RESET and reset the state. 1888 */ 1889 ndp->flags |= NCSI_DEV_RESET; 1890 spin_unlock_irqrestore(&ndp->lock, flags); 1891 return 0; 1892 } 1893 } else { 1894 switch (nd->state) { 1895 case ncsi_dev_state_suspend_done: 1896 case ncsi_dev_state_config_done: 1897 case ncsi_dev_state_functional: 1898 /* Ok */ 1899 break; 1900 default: 1901 /* Current reset operation happening */ 1902 spin_unlock_irqrestore(&ndp->lock, flags); 1903 return 0; 1904 } 1905 } 1906 1907 if (!list_empty(&ndp->channel_queue)) { 1908 /* Clear any channel queue we may have interrupted */ 1909 list_for_each_entry_safe(nc, tmp, &ndp->channel_queue, link) 1910 list_del_init(&nc->link); 1911 } 1912 spin_unlock_irqrestore(&ndp->lock, flags); 1913 1914 active = NULL; 1915 NCSI_FOR_EACH_PACKAGE(ndp, np) { 1916 NCSI_FOR_EACH_CHANNEL(np, nc) { 1917 spin_lock_irqsave(&nc->lock, flags); 1918 1919 if (nc->state == NCSI_CHANNEL_ACTIVE) { 1920 active = nc; 1921 nc->state = NCSI_CHANNEL_INVISIBLE; 1922 spin_unlock_irqrestore(&nc->lock, flags); 1923 ncsi_stop_channel_monitor(nc); 1924 break; 1925 } 1926 1927 spin_unlock_irqrestore(&nc->lock, flags); 1928 } 1929 if (active) 1930 break; 1931 } 1932 1933 if (!active) { 1934 /* Done */ 1935 spin_lock_irqsave(&ndp->lock, flags); 1936 ndp->flags &= ~NCSI_DEV_RESET; 1937 spin_unlock_irqrestore(&ndp->lock, flags); 1938 return ncsi_choose_active_channel(ndp); 1939 } 1940 1941 spin_lock_irqsave(&ndp->lock, flags); 1942 ndp->flags |= NCSI_DEV_RESET; 1943 ndp->active_channel = active; 1944 ndp->active_package = active->package; 1945 spin_unlock_irqrestore(&ndp->lock, flags); 1946 1947 nd->state = ncsi_dev_state_suspend; 1948 schedule_work(&ndp->work); 1949 return 0; 1950 } 1951 1952 void ncsi_unregister_dev(struct ncsi_dev *nd) 1953 { 1954 struct ncsi_dev_priv *ndp = TO_NCSI_DEV_PRIV(nd); 1955 struct ncsi_package *np, *tmp; 1956 unsigned long flags; 1957 1958 dev_remove_pack(&ndp->ptype); 1959 1960 list_for_each_entry_safe(np, tmp, &ndp->packages, node) 1961 ncsi_remove_package(np); 1962 1963 spin_lock_irqsave(&ncsi_dev_lock, flags); 1964 list_del_rcu(&ndp->node); 1965 spin_unlock_irqrestore(&ncsi_dev_lock, flags); 1966 1967 kfree(ndp); 1968 } 1969 EXPORT_SYMBOL_GPL(ncsi_unregister_dev); 1970