fwsignal.c revision fba1400a9b8149b3c7ee02be3b1ea0429912372e
1/* 2 * Copyright (c) 2010 Broadcom Corporation 3 * 4 * Permission to use, copy, modify, and/or distribute this software for any 5 * purpose with or without fee is hereby granted, provided that the above 6 * copyright notice and this permission notice appear in all copies. 7 * 8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY 11 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION 13 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN 14 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 15 */ 16#include <linux/types.h> 17#include <linux/if_ether.h> 18#include <linux/spinlock.h> 19#include <linux/skbuff.h> 20#include <linux/netdevice.h> 21#include <linux/err.h> 22#include <uapi/linux/nl80211.h> 23 24#include <brcmu_utils.h> 25#include <brcmu_wifi.h> 26#include "dhd.h" 27#include "dhd_dbg.h" 28#include "fwil.h" 29#include "fweh.h" 30#include "fwsignal.h" 31 32/** 33 * DOC: Firmware Signalling 34 * 35 * Firmware can send signals to host and vice versa, which are passed in the 36 * data packets using TLV based header. This signalling layer is on top of the 37 * BDC bus protocol layer. 38 */ 39 40/* 41 * single definition for firmware-driver flow control tlv's. 42 * 43 * each tlv is specified by BRCMF_FWS_TLV_DEF(name, ID, length). 44 * A length value 0 indicates variable length tlv. 45 */ 46#define BRCMF_FWS_TLV_DEFLIST \ 47 BRCMF_FWS_TLV_DEF(MAC_OPEN, 1, 1) \ 48 BRCMF_FWS_TLV_DEF(MAC_CLOSE, 2, 1) \ 49 BRCMF_FWS_TLV_DEF(MAC_REQUEST_CREDIT, 3, 2) \ 50 BRCMF_FWS_TLV_DEF(TXSTATUS, 4, 4) \ 51 BRCMF_FWS_TLV_DEF(PKTTAG, 5, 4) \ 52 BRCMF_FWS_TLV_DEF(MACDESC_ADD, 6, 8) \ 53 BRCMF_FWS_TLV_DEF(MACDESC_DEL, 7, 8) \ 54 BRCMF_FWS_TLV_DEF(RSSI, 8, 1) \ 55 BRCMF_FWS_TLV_DEF(INTERFACE_OPEN, 9, 1) \ 56 BRCMF_FWS_TLV_DEF(INTERFACE_CLOSE, 10, 1) \ 57 BRCMF_FWS_TLV_DEF(FIFO_CREDITBACK, 11, 8) \ 58 BRCMF_FWS_TLV_DEF(PENDING_TRAFFIC_BMP, 12, 2) \ 59 BRCMF_FWS_TLV_DEF(MAC_REQUEST_PACKET, 13, 3) \ 60 BRCMF_FWS_TLV_DEF(HOST_REORDER_RXPKTS, 14, 10) \ 61 BRCMF_FWS_TLV_DEF(TRANS_ID, 18, 6) \ 62 BRCMF_FWS_TLV_DEF(COMP_TXSTATUS, 19, 1) \ 63 BRCMF_FWS_TLV_DEF(FILLER, 255, 0) 64 65/** 66 * enum brcmf_fws_tlv_type - definition of tlv identifiers. 67 */ 68#define BRCMF_FWS_TLV_DEF(name, id, len) \ 69 BRCMF_FWS_TYPE_ ## name = id, 70enum brcmf_fws_tlv_type { 71 BRCMF_FWS_TLV_DEFLIST 72 BRCMF_FWS_TYPE_INVALID 73}; 74#undef BRCMF_FWS_TLV_DEF 75 76#ifdef DEBUG 77/** 78 * brcmf_fws_tlv_names - array of tlv names. 79 */ 80#define BRCMF_FWS_TLV_DEF(name, id, len) \ 81 { id, #name }, 82static struct { 83 enum brcmf_fws_tlv_type id; 84 const char *name; 85} brcmf_fws_tlv_names[] = { 86 BRCMF_FWS_TLV_DEFLIST 87}; 88#undef BRCMF_FWS_TLV_DEF 89 90static const char *brcmf_fws_get_tlv_name(enum brcmf_fws_tlv_type id) 91{ 92 int i; 93 94 for (i = 0; i < ARRAY_SIZE(brcmf_fws_tlv_names); i++) 95 if (brcmf_fws_tlv_names[i].id == id) 96 return brcmf_fws_tlv_names[i].name; 97 98 return "INVALID"; 99} 100#else 101static const char *brcmf_fws_get_tlv_name(enum brcmf_fws_tlv_type id) 102{ 103 return "NODEBUG"; 104} 105#endif /* DEBUG */ 106 107/** 108 * flags used to enable tlv signalling from firmware. 109 */ 110#define BRCMF_FWS_FLAGS_RSSI_SIGNALS 0x0001 111#define BRCMF_FWS_FLAGS_XONXOFF_SIGNALS 0x0002 112#define BRCMF_FWS_FLAGS_CREDIT_STATUS_SIGNALS 0x0004 113#define BRCMF_FWS_FLAGS_HOST_PROPTXSTATUS_ACTIVE 0x0008 114#define BRCMF_FWS_FLAGS_PSQ_GENERATIONFSM_ENABLE 0x0010 115#define BRCMF_FWS_FLAGS_PSQ_ZERO_BUFFER_ENABLE 0x0020 116#define BRCMF_FWS_FLAGS_HOST_RXREORDER_ACTIVE 0x0040 117 118#define BRCMF_FWS_HANGER_MAXITEMS 1024 119#define BRCMF_FWS_HANGER_ITEM_STATE_FREE 1 120#define BRCMF_FWS_HANGER_ITEM_STATE_INUSE 2 121#define BRCMF_FWS_HANGER_ITEM_STATE_INUSE_SUPPRESSED 3 122 123#define BRCMF_FWS_STATE_OPEN 1 124#define BRCMF_FWS_STATE_CLOSE 2 125 126#define BRCMF_FWS_FCMODE_NONE 0 127#define BRCMF_FWS_FCMODE_IMPLIED_CREDIT 1 128#define BRCMF_FWS_FCMODE_EXPLICIT_CREDIT 2 129 130#define BRCMF_FWS_MAC_DESC_TABLE_SIZE 32 131#define BRCMF_FWS_MAX_IFNUM 16 132#define BRCMF_FWS_MAC_DESC_ID_INVALID 0xff 133 134#define BRCMF_FWS_HOSTIF_FLOWSTATE_OFF 0 135#define BRCMF_FWS_HOSTIF_FLOWSTATE_ON 1 136 137#define BRCMF_FWS_PSQ_PREC_COUNT ((NL80211_NUM_ACS + 1) * 2) 138#define BRCMF_FWS_PSQ_LEN 256 139 140/** 141 * struct brcmf_fws_mac_descriptor - firmware signalling data per node/interface 142 * 143 * @occupied: slot is in use. 144 * @mac_handle: handle for mac entry determined by firmware. 145 * @interface_id: interface index. 146 * @state: current state. 147 * @ac_bitmap: ac queue bitmap. 148 * @requested_credit: credits requested by firmware. 149 * @ea: ethernet address. 150 * @psq: power-save queue. 151 */ 152struct brcmf_fws_mac_descriptor { 153 u8 occupied; 154 u8 mac_handle; 155 u8 interface_id; 156 u8 state; 157 u8 ac_bitmap; 158 u8 requested_credit; 159 u8 ea[ETH_ALEN]; 160 struct pktq psq; 161}; 162 163/** 164 * FWFC packet identifier 165 * 166 * 32-bit packet identifier used in PKTTAG tlv from host to dongle. 167 * 168 * - Generated at the host (e.g. dhd) 169 * - Seen as a generic sequence number by wlc except the flags field 170 * 171 * Generation : b[31] => generation number for this packet [host->fw] 172 * OR, current generation number [fw->host] 173 * Flags : b[30:27] => command, status flags 174 * FIFO-AC : b[26:24] => AC-FIFO id 175 * h-slot : b[23:8] => hanger-slot 176 * freerun : b[7:0] => A free running counter 177 */ 178#define BRCMF_FWS_PKTTAG_GENERATION_MASK 0x80000000 179#define BRCMF_FWS_PKTTAG_GENERATION_SHIFT 31 180#define BRCMF_FWS_PKTTAG_FLAGS_MASK 0x78000000 181#define BRCMF_FWS_PKTTAG_FLAGS_SHIFT 27 182#define BRCMF_FWS_PKTTAG_FIFO_MASK 0x07000000 183#define BRCMF_FWS_PKTTAG_FIFO_SHIFT 24 184#define BRCMF_FWS_PKTTAG_HSLOT_MASK 0x00ffff00 185#define BRCMF_FWS_PKTTAG_HSLOT_SHIFT 8 186#define BRCMF_FWS_PKTTAG_FREERUN_MASK 0x000000ff 187#define BRCMF_FWS_PKTTAG_FREERUN_SHIFT 0 188 189#define brcmf_fws_pkttag_set_field(var, field, value) \ 190 brcmu_maskset32((var), BRCMF_FWS_PKTTAG_ ## field ## _MASK, \ 191 BRCMF_FWS_PKTTAG_ ## field ## _SHIFT, (value)) 192#define brcmf_fws_pkttag_get_field(var, field) \ 193 brcmu_maskget32((var), BRCMF_FWS_PKTTAG_ ## field ## _MASK, \ 194 BRCMF_FWS_PKTTAG_ ## field ## _SHIFT) 195 196struct brcmf_fws_info { 197 struct brcmf_pub *drvr; 198 struct brcmf_fws_stats stats; 199 struct brcmf_fws_mac_descriptor nodes[BRCMF_FWS_MAC_DESC_TABLE_SIZE]; 200 struct brcmf_fws_mac_descriptor other; 201 int fifo_credit[NL80211_NUM_ACS+1+1]; 202}; 203 204/** 205 * brcmf_fws_get_tlv_len() - returns defined length for given tlv id. 206 */ 207#define BRCMF_FWS_TLV_DEF(name, id, len) \ 208 case BRCMF_FWS_TYPE_ ## name: \ 209 return len; 210 211static int brcmf_fws_get_tlv_len(struct brcmf_fws_info *fws, 212 enum brcmf_fws_tlv_type id) 213{ 214 switch (id) { 215 BRCMF_FWS_TLV_DEFLIST 216 default: 217 brcmf_err("invalid tlv id: %d\n", id); 218 fws->stats.tlv_invalid_type++; 219 break; 220 } 221 return -EINVAL; 222} 223#undef BRCMF_FWS_TLV_DEF 224 225static void brcmf_fws_init_mac_descriptor(struct brcmf_fws_mac_descriptor *desc, 226 u8 *addr, u8 ifidx) 227{ 228 brcmf_dbg(TRACE, "enter: ea=%pM, ifidx=%u\n", addr, ifidx); 229 desc->occupied = 1; 230 desc->state = BRCMF_FWS_STATE_OPEN; 231 desc->requested_credit = 0; 232 /* depending on use may need ifp->bssidx instead */ 233 desc->interface_id = ifidx; 234 desc->ac_bitmap = 0xff; /* update this when handling APSD */ 235 memcpy(&desc->ea[0], addr, ETH_ALEN); 236} 237 238static 239void brcmf_fws_clear_mac_descriptor(struct brcmf_fws_mac_descriptor *desc) 240{ 241 brcmf_dbg(TRACE, 242 "enter: ea=%pM, ifidx=%u\n", desc->ea, desc->interface_id); 243 desc->occupied = 0; 244 desc->state = BRCMF_FWS_STATE_CLOSE; 245 desc->requested_credit = 0; 246} 247 248static struct brcmf_fws_mac_descriptor * 249brcmf_fws_mac_descriptor_lookup(struct brcmf_fws_info *fws, u8 *ea) 250{ 251 struct brcmf_fws_mac_descriptor *entry; 252 int i; 253 254 brcmf_dbg(TRACE, "enter: ea=%pM\n", ea); 255 if (ea == NULL) 256 return ERR_PTR(-EINVAL); 257 258 entry = &fws->nodes[0]; 259 for (i = 0; i < ARRAY_SIZE(fws->nodes); i++) { 260 if (entry->occupied && !memcmp(entry->ea, ea, ETH_ALEN)) 261 return entry; 262 entry++; 263 } 264 265 return ERR_PTR(-ENOENT); 266} 267 268static void brcmf_fws_mac_desc_cleanup(struct brcmf_fws_mac_descriptor *entry, 269 bool (*fn)(struct sk_buff *, void *), 270 int ifidx) 271{ 272 brcmf_dbg(TRACE, "enter: entry=(ea=%pM,ifid=%d), ifidx=%d\n", 273 entry->ea, entry->interface_id, ifidx); 274 if (entry->occupied && (fn == NULL || (ifidx == entry->interface_id))) { 275 brcmf_dbg(TRACE, "flush delayQ: ifidx=%d, qlen=%d\n", 276 ifidx, entry->psq.len); 277 /* release packets held in DELAYQ */ 278 brcmu_pktq_flush(&entry->psq, true, fn, &ifidx); 279 entry->occupied = !!(entry->psq.len); 280 } 281} 282 283static void brcmf_fws_cleanup(struct brcmf_fws_info *fws, int ifidx) 284{ 285 int i; 286 struct brcmf_fws_mac_descriptor *table; 287 288 brcmf_dbg(TRACE, "enter: ifidx=%d\n", ifidx); 289 if (fws == NULL) 290 return; 291 292 /* cleanup individual nodes */ 293 table = &fws->nodes[0]; 294 for (i = 0; i < ARRAY_SIZE(fws->nodes); i++) 295 brcmf_fws_mac_desc_cleanup(&table[i], NULL, ifidx); 296 297 brcmf_fws_mac_desc_cleanup(&fws->other, NULL, ifidx); 298} 299 300static int brcmf_fws_rssi_indicate(struct brcmf_fws_info *fws, s8 rssi) 301{ 302 brcmf_dbg(CTL, "rssi %d\n", rssi); 303 return 0; 304} 305 306static 307int brcmf_fws_macdesc_indicate(struct brcmf_fws_info *fws, u8 type, u8 *data) 308{ 309 struct brcmf_fws_mac_descriptor *entry, *existing; 310 u8 mac_handle; 311 u8 ifidx; 312 u8 *addr; 313 314 mac_handle = *data++; 315 ifidx = *data++; 316 addr = data; 317 318 entry = &fws->nodes[mac_handle & 0x1F]; 319 if (type == BRCMF_FWS_TYPE_MACDESC_DEL) { 320 brcmf_dbg(TRACE, "deleting mac %pM idx %d\n", addr, ifidx); 321 if (entry->occupied) { 322 entry->occupied = 0; 323 entry->state = BRCMF_FWS_STATE_CLOSE; 324 entry->requested_credit = 0; 325 } else { 326 fws->stats.mac_update_failed++; 327 } 328 return 0; 329 } 330 331 brcmf_dbg(TRACE, "add mac %pM idx %d\n", addr, ifidx); 332 existing = brcmf_fws_mac_descriptor_lookup(fws, addr); 333 if (IS_ERR(existing)) { 334 if (!entry->occupied) { 335 entry->mac_handle = mac_handle; 336 brcmf_fws_init_mac_descriptor(entry, addr, ifidx); 337 brcmu_pktq_init(&entry->psq, BRCMF_FWS_PSQ_PREC_COUNT, 338 BRCMF_FWS_PSQ_LEN); 339 } else { 340 fws->stats.mac_update_failed++; 341 } 342 } else { 343 if (entry != existing) { 344 brcmf_dbg(TRACE, "relocate mac\n"); 345 memcpy(entry, existing, 346 offsetof(struct brcmf_fws_mac_descriptor, psq)); 347 entry->mac_handle = mac_handle; 348 brcmf_fws_clear_mac_descriptor(existing); 349 } else { 350 brcmf_dbg(TRACE, "use existing\n"); 351 WARN_ON(entry->mac_handle != mac_handle); 352 /* TODO: what should we do here: continue, reinit, .. */ 353 } 354 } 355 return 0; 356} 357 358static int brcmf_fws_dbg_seqnum_check(struct brcmf_fws_info *fws, u8 *data) 359{ 360 __le32 timestamp; 361 362 memcpy(×tamp, &data[2], sizeof(timestamp)); 363 brcmf_dbg(INFO, "received: seq %d, timestamp %d\n", data[1], 364 le32_to_cpu(timestamp)); 365 return 0; 366} 367 368/* using macro so sparse checking does not complain 369 * about locking imbalance. 370 */ 371#define brcmf_fws_lock(drvr, flags) \ 372do { \ 373 flags = 0; \ 374 spin_lock_irqsave(&((drvr)->fws_spinlock), (flags)); \ 375} while (0) 376 377/* using macro so sparse checking does not complain 378 * about locking imbalance. 379 */ 380#define brcmf_fws_unlock(drvr, flags) \ 381 spin_unlock_irqrestore(&((drvr)->fws_spinlock), (flags)) 382 383static int brcmf_fws_notify_credit_map(struct brcmf_if *ifp, 384 const struct brcmf_event_msg *e, 385 void *data) 386{ 387 struct brcmf_fws_info *fws = ifp->drvr->fws; 388 int i; 389 ulong flags; 390 u8 *credits = data; 391 392 brcmf_fws_lock(ifp->drvr, flags); 393 for (i = 0; i < ARRAY_SIZE(fws->fifo_credit); i++) 394 fws->fifo_credit[i] = *credits++; 395 brcmf_fws_unlock(ifp->drvr, flags); 396 return 0; 397} 398 399int brcmf_fws_init(struct brcmf_pub *drvr) 400{ 401 u32 tlv = 0; 402 int rc; 403 404 /* enable rssi signals */ 405 if (drvr->fw_signals) 406 tlv = BRCMF_FWS_FLAGS_RSSI_SIGNALS | 407 BRCMF_FWS_FLAGS_XONXOFF_SIGNALS; 408 409 spin_lock_init(&drvr->fws_spinlock); 410 411 drvr->fws = kzalloc(sizeof(*(drvr->fws)), GFP_KERNEL); 412 if (!drvr->fws) { 413 rc = -ENOMEM; 414 goto fail; 415 } 416 417 /* enable proptxtstatus signaling by default */ 418 rc = brcmf_fil_iovar_int_set(drvr->iflist[0], "tlv", tlv); 419 if (rc < 0) { 420 brcmf_err("failed to set bdcv2 tlv signaling\n"); 421 goto fail; 422 } 423 424 if (brcmf_fweh_register(drvr, BRCMF_E_FIFO_CREDIT_MAP, 425 brcmf_fws_notify_credit_map)) { 426 brcmf_err("register credit map handler failed\n"); 427 goto fail; 428 } 429 430 /* create debugfs file for statistics */ 431 brcmf_debugfs_create_fws_stats(drvr, &drvr->fws->stats); 432 433 /* set linkage back */ 434 drvr->fws->drvr = drvr; 435 436 /* TODO: remove upon feature delivery */ 437 brcmf_err("%s bdcv2 tlv signaling [%x]\n", 438 drvr->fw_signals ? "enabled" : "disabled", tlv); 439 return 0; 440 441fail: 442 /* disable flow control entirely */ 443 drvr->fw_signals = false; 444 brcmf_fws_deinit(drvr); 445 return rc; 446} 447 448void brcmf_fws_deinit(struct brcmf_pub *drvr) 449{ 450 struct brcmf_fws_info *fws = drvr->fws; 451 ulong flags; 452 453 /* cleanup */ 454 brcmf_fws_lock(drvr, flags); 455 brcmf_fws_cleanup(fws, -1); 456 drvr->fws = NULL; 457 brcmf_fws_unlock(drvr, flags); 458 459 /* free top structure */ 460 kfree(fws); 461} 462 463int brcmf_fws_hdrpull(struct brcmf_pub *drvr, int ifidx, s16 signal_len, 464 struct sk_buff *skb) 465{ 466 struct brcmf_fws_info *fws = drvr->fws; 467 ulong flags; 468 u8 *signal_data; 469 s16 data_len; 470 u8 type; 471 u8 len; 472 u8 *data; 473 474 brcmf_dbg(TRACE, "enter: ifidx %d, skblen %u, sig %d\n", 475 ifidx, skb->len, signal_len); 476 477 WARN_ON(signal_len > skb->len); 478 479 /* if flow control disabled, skip to packet data and leave */ 480 if (!signal_len || !drvr->fw_signals) { 481 skb_pull(skb, signal_len); 482 return 0; 483 } 484 485 /* lock during tlv parsing */ 486 brcmf_fws_lock(drvr, flags); 487 488 fws->stats.header_pulls++; 489 data_len = signal_len; 490 signal_data = skb->data; 491 492 while (data_len > 0) { 493 /* extract tlv info */ 494 type = signal_data[0]; 495 496 /* FILLER type is actually not a TLV, but 497 * a single byte that can be skipped. 498 */ 499 if (type == BRCMF_FWS_TYPE_FILLER) { 500 signal_data += 1; 501 data_len -= 1; 502 continue; 503 } 504 len = signal_data[1]; 505 data = signal_data + 2; 506 507 /* abort parsing when length invalid */ 508 if (data_len < len + 2) 509 break; 510 511 if (len != brcmf_fws_get_tlv_len(fws, type)) 512 break; 513 514 brcmf_dbg(INFO, "tlv type=%d (%s), len=%d\n", type, 515 brcmf_fws_get_tlv_name(type), len); 516 switch (type) { 517 case BRCMF_FWS_TYPE_MAC_OPEN: 518 case BRCMF_FWS_TYPE_MAC_CLOSE: 519 case BRCMF_FWS_TYPE_MAC_REQUEST_CREDIT: 520 case BRCMF_FWS_TYPE_TXSTATUS: 521 case BRCMF_FWS_TYPE_PKTTAG: 522 case BRCMF_FWS_TYPE_INTERFACE_OPEN: 523 case BRCMF_FWS_TYPE_INTERFACE_CLOSE: 524 case BRCMF_FWS_TYPE_FIFO_CREDITBACK: 525 case BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP: 526 case BRCMF_FWS_TYPE_MAC_REQUEST_PACKET: 527 case BRCMF_FWS_TYPE_HOST_REORDER_RXPKTS: 528 case BRCMF_FWS_TYPE_COMP_TXSTATUS: 529 break; 530 case BRCMF_FWS_TYPE_MACDESC_ADD: 531 case BRCMF_FWS_TYPE_MACDESC_DEL: 532 brcmf_fws_macdesc_indicate(fws, type, data); 533 break; 534 case BRCMF_FWS_TYPE_RSSI: 535 brcmf_fws_rssi_indicate(fws, *data); 536 break; 537 case BRCMF_FWS_TYPE_TRANS_ID: 538 brcmf_fws_dbg_seqnum_check(fws, data); 539 break; 540 default: 541 fws->stats.tlv_invalid_type++; 542 break; 543 } 544 545 signal_data += len + 2; 546 data_len -= len + 2; 547 } 548 549 if (data_len != 0) 550 fws->stats.tlv_parse_failed++; 551 552 /* signalling processing result does 553 * not affect the actual ethernet packet. 554 */ 555 skb_pull(skb, signal_len); 556 557 /* this may be a signal-only packet 558 */ 559 if (skb->len == 0) 560 fws->stats.header_only_pkt++; 561 562 brcmf_fws_unlock(drvr, flags); 563 return 0; 564} 565 566void brcmf_fws_reset_interface(struct brcmf_if *ifp) 567{ 568 struct brcmf_fws_mac_descriptor *entry = ifp->fws_desc; 569 570 brcmf_dbg(TRACE, "enter: idx=%d\n", ifp->bssidx); 571 if (!entry) 572 return; 573 574 brcmf_fws_init_mac_descriptor(entry, ifp->mac_addr, ifp->ifidx); 575} 576 577void brcmf_fws_add_interface(struct brcmf_if *ifp) 578{ 579 struct brcmf_fws_mac_descriptor *entry; 580 581 brcmf_dbg(TRACE, "enter: idx=%d, mac=%pM\n", 582 ifp->bssidx, ifp->mac_addr); 583 if (!ifp->drvr->fw_signals) 584 return; 585 586 entry = kzalloc(sizeof(*entry), GFP_ATOMIC); 587 if (entry) { 588 ifp->fws_desc = entry; 589 brcmf_fws_init_mac_descriptor(entry, ifp->mac_addr, ifp->ifidx); 590 brcmu_pktq_init(&entry->psq, BRCMF_FWS_PSQ_PREC_COUNT, 591 BRCMF_FWS_PSQ_LEN); 592 } else { 593 brcmf_err("no firmware signalling\n"); 594 } 595} 596 597void brcmf_fws_del_interface(struct brcmf_if *ifp) 598{ 599 struct brcmf_fws_mac_descriptor *entry = ifp->fws_desc; 600 601 brcmf_dbg(TRACE, "enter: idx=%d\n", ifp->bssidx); 602 if (!entry) 603 return; 604 605 ifp->fws_desc = NULL; 606 brcmf_fws_clear_mac_descriptor(entry); 607 kfree(entry); 608} 609