fwsignal.c revision 28a905b51c2b3fabbb0eb53af229fc365200e398
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/module.h> 18#include <linux/if_ether.h> 19#include <linux/spinlock.h> 20#include <linux/skbuff.h> 21#include <linux/netdevice.h> 22#include <linux/etherdevice.h> 23#include <linux/err.h> 24#include <linux/jiffies.h> 25#include <net/cfg80211.h> 26 27#include <brcmu_utils.h> 28#include <brcmu_wifi.h> 29#include "dhd.h" 30#include "dhd_proto.h" 31#include "dhd_dbg.h" 32#include "dhd_bus.h" 33#include "fwil.h" 34#include "fwil_types.h" 35#include "fweh.h" 36#include "fwsignal.h" 37#include "p2p.h" 38#include "wl_cfg80211.h" 39 40/** 41 * DOC: Firmware Signalling 42 * 43 * Firmware can send signals to host and vice versa, which are passed in the 44 * data packets using TLV based header. This signalling layer is on top of the 45 * BDC bus protocol layer. 46 */ 47 48/* 49 * single definition for firmware-driver flow control tlv's. 50 * 51 * each tlv is specified by BRCMF_FWS_TLV_DEF(name, ID, length). 52 * A length value 0 indicates variable length tlv. 53 */ 54#define BRCMF_FWS_TLV_DEFLIST \ 55 BRCMF_FWS_TLV_DEF(MAC_OPEN, 1, 1) \ 56 BRCMF_FWS_TLV_DEF(MAC_CLOSE, 2, 1) \ 57 BRCMF_FWS_TLV_DEF(MAC_REQUEST_CREDIT, 3, 2) \ 58 BRCMF_FWS_TLV_DEF(TXSTATUS, 4, 4) \ 59 BRCMF_FWS_TLV_DEF(PKTTAG, 5, 4) \ 60 BRCMF_FWS_TLV_DEF(MACDESC_ADD, 6, 8) \ 61 BRCMF_FWS_TLV_DEF(MACDESC_DEL, 7, 8) \ 62 BRCMF_FWS_TLV_DEF(RSSI, 8, 1) \ 63 BRCMF_FWS_TLV_DEF(INTERFACE_OPEN, 9, 1) \ 64 BRCMF_FWS_TLV_DEF(INTERFACE_CLOSE, 10, 1) \ 65 BRCMF_FWS_TLV_DEF(FIFO_CREDITBACK, 11, 6) \ 66 BRCMF_FWS_TLV_DEF(PENDING_TRAFFIC_BMP, 12, 2) \ 67 BRCMF_FWS_TLV_DEF(MAC_REQUEST_PACKET, 13, 3) \ 68 BRCMF_FWS_TLV_DEF(HOST_REORDER_RXPKTS, 14, 10) \ 69 BRCMF_FWS_TLV_DEF(TRANS_ID, 18, 6) \ 70 BRCMF_FWS_TLV_DEF(COMP_TXSTATUS, 19, 1) \ 71 BRCMF_FWS_TLV_DEF(FILLER, 255, 0) 72 73/* 74 * enum brcmf_fws_tlv_type - definition of tlv identifiers. 75 */ 76#define BRCMF_FWS_TLV_DEF(name, id, len) \ 77 BRCMF_FWS_TYPE_ ## name = id, 78enum brcmf_fws_tlv_type { 79 BRCMF_FWS_TLV_DEFLIST 80 BRCMF_FWS_TYPE_INVALID 81}; 82#undef BRCMF_FWS_TLV_DEF 83 84/* 85 * enum brcmf_fws_tlv_len - definition of tlv lengths. 86 */ 87#define BRCMF_FWS_TLV_DEF(name, id, len) \ 88 BRCMF_FWS_TYPE_ ## name ## _LEN = (len), 89enum brcmf_fws_tlv_len { 90 BRCMF_FWS_TLV_DEFLIST 91}; 92#undef BRCMF_FWS_TLV_DEF 93 94#ifdef DEBUG 95/* 96 * brcmf_fws_tlv_names - array of tlv names. 97 */ 98#define BRCMF_FWS_TLV_DEF(name, id, len) \ 99 { id, #name }, 100static struct { 101 enum brcmf_fws_tlv_type id; 102 const char *name; 103} brcmf_fws_tlv_names[] = { 104 BRCMF_FWS_TLV_DEFLIST 105}; 106#undef BRCMF_FWS_TLV_DEF 107 108static const char *brcmf_fws_get_tlv_name(enum brcmf_fws_tlv_type id) 109{ 110 int i; 111 112 for (i = 0; i < ARRAY_SIZE(brcmf_fws_tlv_names); i++) 113 if (brcmf_fws_tlv_names[i].id == id) 114 return brcmf_fws_tlv_names[i].name; 115 116 return "INVALID"; 117} 118#else 119static const char *brcmf_fws_get_tlv_name(enum brcmf_fws_tlv_type id) 120{ 121 return "NODEBUG"; 122} 123#endif /* DEBUG */ 124 125/* 126 * flags used to enable tlv signalling from firmware. 127 */ 128#define BRCMF_FWS_FLAGS_RSSI_SIGNALS 0x0001 129#define BRCMF_FWS_FLAGS_XONXOFF_SIGNALS 0x0002 130#define BRCMF_FWS_FLAGS_CREDIT_STATUS_SIGNALS 0x0004 131#define BRCMF_FWS_FLAGS_HOST_PROPTXSTATUS_ACTIVE 0x0008 132#define BRCMF_FWS_FLAGS_PSQ_GENERATIONFSM_ENABLE 0x0010 133#define BRCMF_FWS_FLAGS_PSQ_ZERO_BUFFER_ENABLE 0x0020 134#define BRCMF_FWS_FLAGS_HOST_RXREORDER_ACTIVE 0x0040 135 136#define BRCMF_FWS_MAC_DESC_TABLE_SIZE 32 137#define BRCMF_FWS_MAC_DESC_ID_INVALID 0xff 138 139#define BRCMF_FWS_HOSTIF_FLOWSTATE_OFF 0 140#define BRCMF_FWS_HOSTIF_FLOWSTATE_ON 1 141#define BRCMF_FWS_FLOWCONTROL_HIWATER 128 142#define BRCMF_FWS_FLOWCONTROL_LOWATER 64 143 144#define BRCMF_FWS_PSQ_PREC_COUNT ((BRCMF_FWS_FIFO_COUNT + 1) * 2) 145#define BRCMF_FWS_PSQ_LEN 256 146 147#define BRCMF_FWS_HTOD_FLAG_PKTFROMHOST 0x01 148#define BRCMF_FWS_HTOD_FLAG_PKT_REQUESTED 0x02 149 150#define BRCMF_FWS_RET_OK_NOSCHEDULE 0 151#define BRCMF_FWS_RET_OK_SCHEDULE 1 152 153/** 154 * enum brcmf_fws_skb_state - indicates processing state of skb. 155 * 156 * @BRCMF_FWS_SKBSTATE_NEW: sk_buff is newly arrived in the driver. 157 * @BRCMF_FWS_SKBSTATE_DELAYED: sk_buff had to wait on queue. 158 * @BRCMF_FWS_SKBSTATE_SUPPRESSED: sk_buff has been suppressed by firmware. 159 * @BRCMF_FWS_SKBSTATE_TIM: allocated for TIM update info. 160 */ 161enum brcmf_fws_skb_state { 162 BRCMF_FWS_SKBSTATE_NEW, 163 BRCMF_FWS_SKBSTATE_DELAYED, 164 BRCMF_FWS_SKBSTATE_SUPPRESSED, 165 BRCMF_FWS_SKBSTATE_TIM 166}; 167 168/** 169 * struct brcmf_skbuff_cb - control buffer associated with skbuff. 170 * 171 * @if_flags: holds interface index and packet related flags. 172 * @htod: host to device packet identifier (used in PKTTAG tlv). 173 * @state: transmit state of the packet. 174 * @mac: descriptor related to destination for this packet. 175 * 176 * This information is stored in control buffer struct sk_buff::cb, which 177 * provides 48 bytes of storage so this structure should not exceed that. 178 */ 179struct brcmf_skbuff_cb { 180 u16 if_flags; 181 u32 htod; 182 enum brcmf_fws_skb_state state; 183 struct brcmf_fws_mac_descriptor *mac; 184}; 185 186/* 187 * macro casting skbuff control buffer to struct brcmf_skbuff_cb. 188 */ 189#define brcmf_skbcb(skb) ((struct brcmf_skbuff_cb *)((skb)->cb)) 190 191/* 192 * sk_buff control if flags 193 * 194 * b[11] - packet sent upon firmware request. 195 * b[10] - packet only contains signalling data. 196 * b[9] - packet is a tx packet. 197 * b[8] - packet used requested credit 198 * b[7] - interface in AP mode. 199 * b[3:0] - interface index. 200 */ 201#define BRCMF_SKB_IF_FLAGS_REQUESTED_MASK 0x0800 202#define BRCMF_SKB_IF_FLAGS_REQUESTED_SHIFT 11 203#define BRCMF_SKB_IF_FLAGS_SIGNAL_ONLY_MASK 0x0400 204#define BRCMF_SKB_IF_FLAGS_SIGNAL_ONLY_SHIFT 10 205#define BRCMF_SKB_IF_FLAGS_TRANSMIT_MASK 0x0200 206#define BRCMF_SKB_IF_FLAGS_TRANSMIT_SHIFT 9 207#define BRCMF_SKB_IF_FLAGS_REQ_CREDIT_MASK 0x0100 208#define BRCMF_SKB_IF_FLAGS_REQ_CREDIT_SHIFT 8 209#define BRCMF_SKB_IF_FLAGS_IF_AP_MASK 0x0080 210#define BRCMF_SKB_IF_FLAGS_IF_AP_SHIFT 7 211#define BRCMF_SKB_IF_FLAGS_INDEX_MASK 0x000f 212#define BRCMF_SKB_IF_FLAGS_INDEX_SHIFT 0 213 214#define brcmf_skb_if_flags_set_field(skb, field, value) \ 215 brcmu_maskset16(&(brcmf_skbcb(skb)->if_flags), \ 216 BRCMF_SKB_IF_FLAGS_ ## field ## _MASK, \ 217 BRCMF_SKB_IF_FLAGS_ ## field ## _SHIFT, (value)) 218#define brcmf_skb_if_flags_get_field(skb, field) \ 219 brcmu_maskget16(brcmf_skbcb(skb)->if_flags, \ 220 BRCMF_SKB_IF_FLAGS_ ## field ## _MASK, \ 221 BRCMF_SKB_IF_FLAGS_ ## field ## _SHIFT) 222 223/* 224 * sk_buff control packet identifier 225 * 226 * 32-bit packet identifier used in PKTTAG tlv from host to dongle. 227 * 228 * - Generated at the host (e.g. dhd) 229 * - Seen as a generic sequence number by firmware except for the flags field. 230 * 231 * Generation : b[31] => generation number for this packet [host->fw] 232 * OR, current generation number [fw->host] 233 * Flags : b[30:27] => command, status flags 234 * FIFO-AC : b[26:24] => AC-FIFO id 235 * h-slot : b[23:8] => hanger-slot 236 * freerun : b[7:0] => A free running counter 237 */ 238#define BRCMF_SKB_HTOD_TAG_GENERATION_MASK 0x80000000 239#define BRCMF_SKB_HTOD_TAG_GENERATION_SHIFT 31 240#define BRCMF_SKB_HTOD_TAG_FLAGS_MASK 0x78000000 241#define BRCMF_SKB_HTOD_TAG_FLAGS_SHIFT 27 242#define BRCMF_SKB_HTOD_TAG_FIFO_MASK 0x07000000 243#define BRCMF_SKB_HTOD_TAG_FIFO_SHIFT 24 244#define BRCMF_SKB_HTOD_TAG_HSLOT_MASK 0x00ffff00 245#define BRCMF_SKB_HTOD_TAG_HSLOT_SHIFT 8 246#define BRCMF_SKB_HTOD_TAG_FREERUN_MASK 0x000000ff 247#define BRCMF_SKB_HTOD_TAG_FREERUN_SHIFT 0 248 249#define brcmf_skb_htod_tag_set_field(skb, field, value) \ 250 brcmu_maskset32(&(brcmf_skbcb(skb)->htod), \ 251 BRCMF_SKB_HTOD_TAG_ ## field ## _MASK, \ 252 BRCMF_SKB_HTOD_TAG_ ## field ## _SHIFT, (value)) 253#define brcmf_skb_htod_tag_get_field(skb, field) \ 254 brcmu_maskget32(brcmf_skbcb(skb)->htod, \ 255 BRCMF_SKB_HTOD_TAG_ ## field ## _MASK, \ 256 BRCMF_SKB_HTOD_TAG_ ## field ## _SHIFT) 257 258#define BRCMF_FWS_TXSTAT_GENERATION_MASK 0x80000000 259#define BRCMF_FWS_TXSTAT_GENERATION_SHIFT 31 260#define BRCMF_FWS_TXSTAT_FLAGS_MASK 0x78000000 261#define BRCMF_FWS_TXSTAT_FLAGS_SHIFT 27 262#define BRCMF_FWS_TXSTAT_FIFO_MASK 0x07000000 263#define BRCMF_FWS_TXSTAT_FIFO_SHIFT 24 264#define BRCMF_FWS_TXSTAT_HSLOT_MASK 0x00FFFF00 265#define BRCMF_FWS_TXSTAT_HSLOT_SHIFT 8 266#define BRCMF_FWS_TXSTAT_PKTID_MASK 0x00FFFFFF 267#define BRCMF_FWS_TXSTAT_PKTID_SHIFT 0 268 269#define brcmf_txstatus_get_field(txs, field) \ 270 brcmu_maskget32(txs, BRCMF_FWS_TXSTAT_ ## field ## _MASK, \ 271 BRCMF_FWS_TXSTAT_ ## field ## _SHIFT) 272 273/* How long to defer borrowing in jiffies */ 274#define BRCMF_FWS_BORROW_DEFER_PERIOD (HZ / 10) 275 276/** 277 * enum brcmf_fws_fifo - fifo indices used by dongle firmware. 278 * 279 * @BRCMF_FWS_FIFO_FIRST: first fifo, ie. background. 280 * @BRCMF_FWS_FIFO_AC_BK: fifo for background traffic. 281 * @BRCMF_FWS_FIFO_AC_BE: fifo for best-effort traffic. 282 * @BRCMF_FWS_FIFO_AC_VI: fifo for video traffic. 283 * @BRCMF_FWS_FIFO_AC_VO: fifo for voice traffic. 284 * @BRCMF_FWS_FIFO_BCMC: fifo for broadcast/multicast (AP only). 285 * @BRCMF_FWS_FIFO_ATIM: fifo for ATIM (AP only). 286 * @BRCMF_FWS_FIFO_COUNT: number of fifos. 287 */ 288enum brcmf_fws_fifo { 289 BRCMF_FWS_FIFO_FIRST, 290 BRCMF_FWS_FIFO_AC_BK = BRCMF_FWS_FIFO_FIRST, 291 BRCMF_FWS_FIFO_AC_BE, 292 BRCMF_FWS_FIFO_AC_VI, 293 BRCMF_FWS_FIFO_AC_VO, 294 BRCMF_FWS_FIFO_BCMC, 295 BRCMF_FWS_FIFO_ATIM, 296 BRCMF_FWS_FIFO_COUNT 297}; 298 299/** 300 * enum brcmf_fws_txstatus - txstatus flag values. 301 * 302 * @BRCMF_FWS_TXSTATUS_DISCARD: 303 * host is free to discard the packet. 304 * @BRCMF_FWS_TXSTATUS_CORE_SUPPRESS: 305 * 802.11 core suppressed the packet. 306 * @BRCMF_FWS_TXSTATUS_FW_PS_SUPPRESS: 307 * firmware suppress the packet as device is already in PS mode. 308 * @BRCMF_FWS_TXSTATUS_FW_TOSSED: 309 * firmware tossed the packet. 310 * @BRCMF_FWS_TXSTATUS_HOST_TOSSED: 311 * host tossed the packet. 312 */ 313enum brcmf_fws_txstatus { 314 BRCMF_FWS_TXSTATUS_DISCARD, 315 BRCMF_FWS_TXSTATUS_CORE_SUPPRESS, 316 BRCMF_FWS_TXSTATUS_FW_PS_SUPPRESS, 317 BRCMF_FWS_TXSTATUS_FW_TOSSED, 318 BRCMF_FWS_TXSTATUS_HOST_TOSSED 319}; 320 321enum brcmf_fws_fcmode { 322 BRCMF_FWS_FCMODE_NONE, 323 BRCMF_FWS_FCMODE_IMPLIED_CREDIT, 324 BRCMF_FWS_FCMODE_EXPLICIT_CREDIT 325}; 326 327enum brcmf_fws_mac_desc_state { 328 BRCMF_FWS_STATE_OPEN = 1, 329 BRCMF_FWS_STATE_CLOSE 330}; 331 332/** 333 * struct brcmf_fws_mac_descriptor - firmware signalling data per node/interface 334 * 335 * @occupied: slot is in use. 336 * @mac_handle: handle for mac entry determined by firmware. 337 * @interface_id: interface index. 338 * @state: current state. 339 * @suppressed: mac entry is suppressed. 340 * @generation: generation bit. 341 * @ac_bitmap: ac queue bitmap. 342 * @requested_credit: credits requested by firmware. 343 * @ea: ethernet address. 344 * @seq: per-node free-running sequence. 345 * @psq: power-save queue. 346 * @transit_count: packet in transit to firmware. 347 */ 348struct brcmf_fws_mac_descriptor { 349 char name[16]; 350 u8 occupied; 351 u8 mac_handle; 352 u8 interface_id; 353 u8 state; 354 bool suppressed; 355 u8 generation; 356 u8 ac_bitmap; 357 u8 requested_credit; 358 u8 requested_packet; 359 u8 ea[ETH_ALEN]; 360 u8 seq[BRCMF_FWS_FIFO_COUNT]; 361 struct pktq psq; 362 int transit_count; 363 int suppr_transit_count; 364 bool send_tim_signal; 365 u8 traffic_pending_bmp; 366 u8 traffic_lastreported_bmp; 367}; 368 369#define BRCMF_FWS_HANGER_MAXITEMS 1024 370 371/** 372 * enum brcmf_fws_hanger_item_state - state of hanger item. 373 * 374 * @BRCMF_FWS_HANGER_ITEM_STATE_FREE: item is free for use. 375 * @BRCMF_FWS_HANGER_ITEM_STATE_INUSE: item is in use. 376 * @BRCMF_FWS_HANGER_ITEM_STATE_INUSE_SUPPRESSED: item was suppressed. 377 */ 378enum brcmf_fws_hanger_item_state { 379 BRCMF_FWS_HANGER_ITEM_STATE_FREE = 1, 380 BRCMF_FWS_HANGER_ITEM_STATE_INUSE, 381 BRCMF_FWS_HANGER_ITEM_STATE_INUSE_SUPPRESSED 382}; 383 384 385/** 386 * struct brcmf_fws_hanger_item - single entry for tx pending packet. 387 * 388 * @state: entry is either free or occupied. 389 * @pkt: packet itself. 390 */ 391struct brcmf_fws_hanger_item { 392 enum brcmf_fws_hanger_item_state state; 393 struct sk_buff *pkt; 394}; 395 396/** 397 * struct brcmf_fws_hanger - holds packets awaiting firmware txstatus. 398 * 399 * @pushed: packets pushed to await txstatus. 400 * @popped: packets popped upon handling txstatus. 401 * @failed_to_push: packets that could not be pushed. 402 * @failed_to_pop: packets that could not be popped. 403 * @failed_slotfind: packets for which failed to find an entry. 404 * @slot_pos: last returned item index for a free entry. 405 * @items: array of hanger items. 406 */ 407struct brcmf_fws_hanger { 408 u32 pushed; 409 u32 popped; 410 u32 failed_to_push; 411 u32 failed_to_pop; 412 u32 failed_slotfind; 413 u32 slot_pos; 414 struct brcmf_fws_hanger_item items[BRCMF_FWS_HANGER_MAXITEMS]; 415}; 416 417struct brcmf_fws_macdesc_table { 418 struct brcmf_fws_mac_descriptor nodes[BRCMF_FWS_MAC_DESC_TABLE_SIZE]; 419 struct brcmf_fws_mac_descriptor iface[BRCMF_MAX_IFS]; 420 struct brcmf_fws_mac_descriptor other; 421}; 422 423struct brcmf_fws_info { 424 struct brcmf_pub *drvr; 425 struct brcmf_fws_stats stats; 426 struct brcmf_fws_hanger hanger; 427 enum brcmf_fws_fcmode fcmode; 428 bool bcmc_credit_check; 429 struct brcmf_fws_macdesc_table desc; 430 struct workqueue_struct *fws_wq; 431 struct work_struct fws_dequeue_work; 432 u32 fifo_enqpkt[BRCMF_FWS_FIFO_COUNT]; 433 int fifo_credit[BRCMF_FWS_FIFO_COUNT]; 434 int credits_borrowed[BRCMF_FWS_FIFO_AC_VO + 1]; 435 int deq_node_pos[BRCMF_FWS_FIFO_COUNT]; 436 u32 fifo_credit_map; 437 u32 fifo_delay_map; 438 unsigned long borrow_defer_timestamp; 439 bool bus_flow_blocked; 440 bool creditmap_received; 441}; 442 443/* 444 * brcmf_fws_prio2fifo - mapping from 802.1d priority to firmware fifo index. 445 */ 446static const int brcmf_fws_prio2fifo[] = { 447 BRCMF_FWS_FIFO_AC_BE, 448 BRCMF_FWS_FIFO_AC_BK, 449 BRCMF_FWS_FIFO_AC_BK, 450 BRCMF_FWS_FIFO_AC_BE, 451 BRCMF_FWS_FIFO_AC_VI, 452 BRCMF_FWS_FIFO_AC_VI, 453 BRCMF_FWS_FIFO_AC_VO, 454 BRCMF_FWS_FIFO_AC_VO 455}; 456 457static int fcmode; 458module_param(fcmode, int, S_IRUSR); 459MODULE_PARM_DESC(fcmode, "mode of firmware signalled flow control"); 460 461#define BRCMF_FWS_TLV_DEF(name, id, len) \ 462 case BRCMF_FWS_TYPE_ ## name: \ 463 return len; 464 465/** 466 * brcmf_fws_get_tlv_len() - returns defined length for given tlv id. 467 * 468 * @fws: firmware-signalling information. 469 * @id: identifier of the TLV. 470 * 471 * Return: the specified length for the given TLV; Otherwise -EINVAL. 472 */ 473static int brcmf_fws_get_tlv_len(struct brcmf_fws_info *fws, 474 enum brcmf_fws_tlv_type id) 475{ 476 switch (id) { 477 BRCMF_FWS_TLV_DEFLIST 478 default: 479 fws->stats.tlv_invalid_type++; 480 break; 481 } 482 return -EINVAL; 483} 484#undef BRCMF_FWS_TLV_DEF 485 486static bool brcmf_fws_ifidx_match(struct sk_buff *skb, void *arg) 487{ 488 u32 ifidx = brcmf_skb_if_flags_get_field(skb, INDEX); 489 return ifidx == *(int *)arg; 490} 491 492static void brcmf_fws_psq_flush(struct brcmf_fws_info *fws, struct pktq *q, 493 int ifidx) 494{ 495 bool (*matchfn)(struct sk_buff *, void *) = NULL; 496 struct sk_buff *skb; 497 int prec; 498 499 if (ifidx != -1) 500 matchfn = brcmf_fws_ifidx_match; 501 for (prec = 0; prec < q->num_prec; prec++) { 502 skb = brcmu_pktq_pdeq_match(q, prec, matchfn, &ifidx); 503 while (skb) { 504 brcmu_pkt_buf_free_skb(skb); 505 skb = brcmu_pktq_pdeq_match(q, prec, matchfn, &ifidx); 506 } 507 } 508} 509 510static void brcmf_fws_hanger_init(struct brcmf_fws_hanger *hanger) 511{ 512 int i; 513 514 memset(hanger, 0, sizeof(*hanger)); 515 for (i = 0; i < ARRAY_SIZE(hanger->items); i++) 516 hanger->items[i].state = BRCMF_FWS_HANGER_ITEM_STATE_FREE; 517} 518 519static u32 brcmf_fws_hanger_get_free_slot(struct brcmf_fws_hanger *h) 520{ 521 u32 i; 522 523 i = (h->slot_pos + 1) % BRCMF_FWS_HANGER_MAXITEMS; 524 525 while (i != h->slot_pos) { 526 if (h->items[i].state == BRCMF_FWS_HANGER_ITEM_STATE_FREE) { 527 h->slot_pos = i; 528 goto done; 529 } 530 i++; 531 if (i == BRCMF_FWS_HANGER_MAXITEMS) 532 i = 0; 533 } 534 brcmf_err("all slots occupied\n"); 535 h->failed_slotfind++; 536 i = BRCMF_FWS_HANGER_MAXITEMS; 537done: 538 return i; 539} 540 541static int brcmf_fws_hanger_pushpkt(struct brcmf_fws_hanger *h, 542 struct sk_buff *pkt, u32 slot_id) 543{ 544 if (slot_id >= BRCMF_FWS_HANGER_MAXITEMS) 545 return -ENOENT; 546 547 if (h->items[slot_id].state != BRCMF_FWS_HANGER_ITEM_STATE_FREE) { 548 brcmf_err("slot is not free\n"); 549 h->failed_to_push++; 550 return -EINVAL; 551 } 552 553 h->items[slot_id].state = BRCMF_FWS_HANGER_ITEM_STATE_INUSE; 554 h->items[slot_id].pkt = pkt; 555 h->pushed++; 556 return 0; 557} 558 559static int brcmf_fws_hanger_poppkt(struct brcmf_fws_hanger *h, 560 u32 slot_id, struct sk_buff **pktout, 561 bool remove_item) 562{ 563 if (slot_id >= BRCMF_FWS_HANGER_MAXITEMS) 564 return -ENOENT; 565 566 if (h->items[slot_id].state == BRCMF_FWS_HANGER_ITEM_STATE_FREE) { 567 brcmf_err("entry not in use\n"); 568 h->failed_to_pop++; 569 return -EINVAL; 570 } 571 572 *pktout = h->items[slot_id].pkt; 573 if (remove_item) { 574 h->items[slot_id].state = BRCMF_FWS_HANGER_ITEM_STATE_FREE; 575 h->items[slot_id].pkt = NULL; 576 h->popped++; 577 } 578 return 0; 579} 580 581static int brcmf_fws_hanger_mark_suppressed(struct brcmf_fws_hanger *h, 582 u32 slot_id) 583{ 584 if (slot_id >= BRCMF_FWS_HANGER_MAXITEMS) 585 return -ENOENT; 586 587 if (h->items[slot_id].state == BRCMF_FWS_HANGER_ITEM_STATE_FREE) { 588 brcmf_err("entry not in use\n"); 589 return -EINVAL; 590 } 591 592 h->items[slot_id].state = BRCMF_FWS_HANGER_ITEM_STATE_INUSE_SUPPRESSED; 593 return 0; 594} 595 596static void brcmf_fws_hanger_cleanup(struct brcmf_fws_info *fws, 597 bool (*fn)(struct sk_buff *, void *), 598 int ifidx) 599{ 600 struct brcmf_fws_hanger *h = &fws->hanger; 601 struct sk_buff *skb; 602 int i; 603 enum brcmf_fws_hanger_item_state s; 604 605 for (i = 0; i < ARRAY_SIZE(h->items); i++) { 606 s = h->items[i].state; 607 if (s == BRCMF_FWS_HANGER_ITEM_STATE_INUSE || 608 s == BRCMF_FWS_HANGER_ITEM_STATE_INUSE_SUPPRESSED) { 609 skb = h->items[i].pkt; 610 if (fn == NULL || fn(skb, &ifidx)) { 611 /* suppress packets freed from psq */ 612 if (s == BRCMF_FWS_HANGER_ITEM_STATE_INUSE) 613 brcmu_pkt_buf_free_skb(skb); 614 h->items[i].state = 615 BRCMF_FWS_HANGER_ITEM_STATE_FREE; 616 } 617 } 618 } 619} 620 621static void brcmf_fws_macdesc_set_name(struct brcmf_fws_info *fws, 622 struct brcmf_fws_mac_descriptor *desc) 623{ 624 if (desc == &fws->desc.other) 625 strlcpy(desc->name, "MAC-OTHER", sizeof(desc->name)); 626 else if (desc->mac_handle) 627 scnprintf(desc->name, sizeof(desc->name), "MAC-%d:%d", 628 desc->mac_handle, desc->interface_id); 629 else 630 scnprintf(desc->name, sizeof(desc->name), "MACIF:%d", 631 desc->interface_id); 632} 633 634static void brcmf_fws_macdesc_init(struct brcmf_fws_mac_descriptor *desc, 635 u8 *addr, u8 ifidx) 636{ 637 brcmf_dbg(TRACE, 638 "enter: desc %p ea=%pM, ifidx=%u\n", desc, addr, ifidx); 639 desc->occupied = 1; 640 desc->state = BRCMF_FWS_STATE_OPEN; 641 desc->requested_credit = 0; 642 desc->requested_packet = 0; 643 /* depending on use may need ifp->bssidx instead */ 644 desc->interface_id = ifidx; 645 desc->ac_bitmap = 0xff; /* update this when handling APSD */ 646 if (addr) 647 memcpy(&desc->ea[0], addr, ETH_ALEN); 648} 649 650static 651void brcmf_fws_macdesc_deinit(struct brcmf_fws_mac_descriptor *desc) 652{ 653 brcmf_dbg(TRACE, 654 "enter: ea=%pM, ifidx=%u\n", desc->ea, desc->interface_id); 655 desc->occupied = 0; 656 desc->state = BRCMF_FWS_STATE_CLOSE; 657 desc->requested_credit = 0; 658 desc->requested_packet = 0; 659} 660 661static struct brcmf_fws_mac_descriptor * 662brcmf_fws_macdesc_lookup(struct brcmf_fws_info *fws, u8 *ea) 663{ 664 struct brcmf_fws_mac_descriptor *entry; 665 int i; 666 667 if (ea == NULL) 668 return ERR_PTR(-EINVAL); 669 670 entry = &fws->desc.nodes[0]; 671 for (i = 0; i < ARRAY_SIZE(fws->desc.nodes); i++) { 672 if (entry->occupied && !memcmp(entry->ea, ea, ETH_ALEN)) 673 return entry; 674 entry++; 675 } 676 677 return ERR_PTR(-ENOENT); 678} 679 680static struct brcmf_fws_mac_descriptor* 681brcmf_fws_macdesc_find(struct brcmf_fws_info *fws, struct brcmf_if *ifp, u8 *da) 682{ 683 struct brcmf_fws_mac_descriptor *entry = &fws->desc.other; 684 bool multicast; 685 686 multicast = is_multicast_ether_addr(da); 687 688 /* Multicast destination, STA and P2P clients get the interface entry. 689 * STA/GC gets the Mac Entry for TDLS destinations, TDLS destinations 690 * have their own entry. 691 */ 692 if (multicast && ifp->fws_desc) { 693 entry = ifp->fws_desc; 694 goto done; 695 } 696 697 entry = brcmf_fws_macdesc_lookup(fws, da); 698 if (IS_ERR(entry)) 699 entry = ifp->fws_desc; 700 701done: 702 return entry; 703} 704 705static bool brcmf_fws_macdesc_closed(struct brcmf_fws_info *fws, 706 struct brcmf_fws_mac_descriptor *entry, 707 int fifo) 708{ 709 struct brcmf_fws_mac_descriptor *if_entry; 710 bool closed; 711 712 /* for unique destination entries the related interface 713 * may be closed. 714 */ 715 if (entry->mac_handle) { 716 if_entry = &fws->desc.iface[entry->interface_id]; 717 if (if_entry->state == BRCMF_FWS_STATE_CLOSE) 718 return true; 719 } 720 /* an entry is closed when the state is closed and 721 * the firmware did not request anything. 722 */ 723 closed = entry->state == BRCMF_FWS_STATE_CLOSE && 724 !entry->requested_credit && !entry->requested_packet; 725 726 /* Or firmware does not allow traffic for given fifo */ 727 return closed || !(entry->ac_bitmap & BIT(fifo)); 728} 729 730static void brcmf_fws_macdesc_cleanup(struct brcmf_fws_info *fws, 731 struct brcmf_fws_mac_descriptor *entry, 732 int ifidx) 733{ 734 if (entry->occupied && (ifidx == -1 || ifidx == entry->interface_id)) { 735 brcmf_fws_psq_flush(fws, &entry->psq, ifidx); 736 entry->occupied = !!(entry->psq.len); 737 } 738} 739 740static void brcmf_fws_bus_txq_cleanup(struct brcmf_fws_info *fws, 741 bool (*fn)(struct sk_buff *, void *), 742 int ifidx) 743{ 744 struct brcmf_fws_hanger_item *hi; 745 struct pktq *txq; 746 struct sk_buff *skb; 747 int prec; 748 u32 hslot; 749 750 txq = brcmf_bus_gettxq(fws->drvr->bus_if); 751 if (IS_ERR(txq)) { 752 brcmf_dbg(TRACE, "no txq to clean up\n"); 753 return; 754 } 755 756 for (prec = 0; prec < txq->num_prec; prec++) { 757 skb = brcmu_pktq_pdeq_match(txq, prec, fn, &ifidx); 758 while (skb) { 759 hslot = brcmf_skb_htod_tag_get_field(skb, HSLOT); 760 hi = &fws->hanger.items[hslot]; 761 WARN_ON(skb != hi->pkt); 762 hi->state = BRCMF_FWS_HANGER_ITEM_STATE_FREE; 763 brcmu_pkt_buf_free_skb(skb); 764 skb = brcmu_pktq_pdeq_match(txq, prec, fn, &ifidx); 765 } 766 } 767} 768 769static void brcmf_fws_cleanup(struct brcmf_fws_info *fws, int ifidx) 770{ 771 int i; 772 struct brcmf_fws_mac_descriptor *table; 773 bool (*matchfn)(struct sk_buff *, void *) = NULL; 774 775 if (fws == NULL) 776 return; 777 778 if (ifidx != -1) 779 matchfn = brcmf_fws_ifidx_match; 780 781 /* cleanup individual nodes */ 782 table = &fws->desc.nodes[0]; 783 for (i = 0; i < ARRAY_SIZE(fws->desc.nodes); i++) 784 brcmf_fws_macdesc_cleanup(fws, &table[i], ifidx); 785 786 brcmf_fws_macdesc_cleanup(fws, &fws->desc.other, ifidx); 787 brcmf_fws_bus_txq_cleanup(fws, matchfn, ifidx); 788 brcmf_fws_hanger_cleanup(fws, matchfn, ifidx); 789} 790 791static int brcmf_fws_hdrpush(struct brcmf_fws_info *fws, struct sk_buff *skb) 792{ 793 struct brcmf_fws_mac_descriptor *entry = brcmf_skbcb(skb)->mac; 794 u8 *wlh; 795 u16 data_offset = 0; 796 u8 fillers; 797 __le32 pkttag = cpu_to_le32(brcmf_skbcb(skb)->htod); 798 799 brcmf_dbg(TRACE, "enter: %s, idx=%d pkttag=0x%08X, hslot=%d\n", 800 entry->name, brcmf_skb_if_flags_get_field(skb, INDEX), 801 le32_to_cpu(pkttag), (le32_to_cpu(pkttag) >> 8) & 0xffff); 802 if (entry->send_tim_signal) 803 data_offset += 2 + BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP_LEN; 804 805 /* +2 is for Type[1] and Len[1] in TLV, plus TIM signal */ 806 data_offset += 2 + BRCMF_FWS_TYPE_PKTTAG_LEN; 807 fillers = round_up(data_offset, 4) - data_offset; 808 data_offset += fillers; 809 810 skb_push(skb, data_offset); 811 wlh = skb->data; 812 813 wlh[0] = BRCMF_FWS_TYPE_PKTTAG; 814 wlh[1] = BRCMF_FWS_TYPE_PKTTAG_LEN; 815 memcpy(&wlh[2], &pkttag, sizeof(pkttag)); 816 wlh += BRCMF_FWS_TYPE_PKTTAG_LEN + 2; 817 818 if (entry->send_tim_signal) { 819 entry->send_tim_signal = 0; 820 wlh[0] = BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP; 821 wlh[1] = BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP_LEN; 822 wlh[2] = entry->mac_handle; 823 wlh[3] = entry->traffic_pending_bmp; 824 brcmf_dbg(TRACE, "adding TIM info: handle %d bmp 0x%X\n", 825 entry->mac_handle, entry->traffic_pending_bmp); 826 wlh += BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP_LEN + 2; 827 entry->traffic_lastreported_bmp = entry->traffic_pending_bmp; 828 } 829 if (fillers) 830 memset(wlh, BRCMF_FWS_TYPE_FILLER, fillers); 831 832 brcmf_proto_hdrpush(fws->drvr, brcmf_skb_if_flags_get_field(skb, INDEX), 833 data_offset >> 2, skb); 834 return 0; 835} 836 837static bool brcmf_fws_tim_update(struct brcmf_fws_info *fws, 838 struct brcmf_fws_mac_descriptor *entry, 839 int fifo, bool send_immediately) 840{ 841 struct sk_buff *skb; 842 struct brcmf_bus *bus; 843 struct brcmf_skbuff_cb *skcb; 844 s32 err; 845 u32 len; 846 847 /* check delayedQ and suppressQ in one call using bitmap */ 848 if (brcmu_pktq_mlen(&entry->psq, 3 << (fifo * 2)) == 0) 849 entry->traffic_pending_bmp &= ~NBITVAL(fifo); 850 else 851 entry->traffic_pending_bmp |= NBITVAL(fifo); 852 853 entry->send_tim_signal = false; 854 if (entry->traffic_lastreported_bmp != entry->traffic_pending_bmp) 855 entry->send_tim_signal = true; 856 if (send_immediately && entry->send_tim_signal && 857 entry->state == BRCMF_FWS_STATE_CLOSE) { 858 /* create a dummy packet and sent that. The traffic */ 859 /* bitmap info will automatically be attached to that packet */ 860 len = BRCMF_FWS_TYPE_PKTTAG_LEN + 2 + 861 BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP_LEN + 2 + 862 4 + fws->drvr->hdrlen; 863 skb = brcmu_pkt_buf_get_skb(len); 864 if (skb == NULL) 865 return false; 866 skb_pull(skb, len); 867 skcb = brcmf_skbcb(skb); 868 skcb->mac = entry; 869 skcb->state = BRCMF_FWS_SKBSTATE_TIM; 870 bus = fws->drvr->bus_if; 871 err = brcmf_fws_hdrpush(fws, skb); 872 if (err == 0) 873 err = brcmf_bus_txdata(bus, skb); 874 if (err) 875 brcmu_pkt_buf_free_skb(skb); 876 return true; 877 } 878 return false; 879} 880 881static void 882brcmf_fws_flow_control_check(struct brcmf_fws_info *fws, struct pktq *pq, 883 u8 if_id) 884{ 885 struct brcmf_if *ifp = fws->drvr->iflist[!if_id ? 0 : if_id + 1]; 886 887 if (WARN_ON(!ifp)) 888 return; 889 890 if ((ifp->netif_stop & BRCMF_NETIF_STOP_REASON_FWS_FC) && 891 pq->len <= BRCMF_FWS_FLOWCONTROL_LOWATER) 892 brcmf_txflowblock_if(ifp, 893 BRCMF_NETIF_STOP_REASON_FWS_FC, false); 894 if (!(ifp->netif_stop & BRCMF_NETIF_STOP_REASON_FWS_FC) && 895 pq->len >= BRCMF_FWS_FLOWCONTROL_HIWATER) { 896 fws->stats.fws_flow_block++; 897 brcmf_txflowblock_if(ifp, BRCMF_NETIF_STOP_REASON_FWS_FC, true); 898 } 899 return; 900} 901 902static int brcmf_fws_rssi_indicate(struct brcmf_fws_info *fws, s8 rssi) 903{ 904 brcmf_dbg(CTL, "rssi %d\n", rssi); 905 return 0; 906} 907 908/* using macro so sparse checking does not complain 909 * about locking imbalance. 910 */ 911#define brcmf_fws_lock(drvr, flags) \ 912do { \ 913 flags = 0; \ 914 spin_lock_irqsave(&((drvr)->fws_spinlock), (flags)); \ 915} while (0) 916 917/* using macro so sparse checking does not complain 918 * about locking imbalance. 919 */ 920#define brcmf_fws_unlock(drvr, flags) \ 921 spin_unlock_irqrestore(&((drvr)->fws_spinlock), (flags)) 922 923static 924int brcmf_fws_macdesc_indicate(struct brcmf_fws_info *fws, u8 type, u8 *data) 925{ 926 struct brcmf_fws_mac_descriptor *entry, *existing; 927 ulong flags; 928 u8 mac_handle; 929 u8 ifidx; 930 u8 *addr; 931 932 mac_handle = *data++; 933 ifidx = *data++; 934 addr = data; 935 936 entry = &fws->desc.nodes[mac_handle & 0x1F]; 937 if (type == BRCMF_FWS_TYPE_MACDESC_DEL) { 938 if (entry->occupied) { 939 brcmf_dbg(TRACE, "deleting %s mac %pM\n", 940 entry->name, addr); 941 brcmf_fws_lock(fws->drvr, flags); 942 brcmf_fws_macdesc_cleanup(fws, entry, -1); 943 brcmf_fws_macdesc_deinit(entry); 944 brcmf_fws_unlock(fws->drvr, flags); 945 } else 946 fws->stats.mac_update_failed++; 947 return 0; 948 } 949 950 existing = brcmf_fws_macdesc_lookup(fws, addr); 951 if (IS_ERR(existing)) { 952 if (!entry->occupied) { 953 brcmf_fws_lock(fws->drvr, flags); 954 entry->mac_handle = mac_handle; 955 brcmf_fws_macdesc_init(entry, addr, ifidx); 956 brcmf_fws_macdesc_set_name(fws, entry); 957 brcmu_pktq_init(&entry->psq, BRCMF_FWS_PSQ_PREC_COUNT, 958 BRCMF_FWS_PSQ_LEN); 959 brcmf_fws_unlock(fws->drvr, flags); 960 brcmf_dbg(TRACE, "add %s mac %pM\n", entry->name, addr); 961 } else { 962 fws->stats.mac_update_failed++; 963 } 964 } else { 965 if (entry != existing) { 966 brcmf_dbg(TRACE, "copy mac %s\n", existing->name); 967 brcmf_fws_lock(fws->drvr, flags); 968 memcpy(entry, existing, 969 offsetof(struct brcmf_fws_mac_descriptor, psq)); 970 entry->mac_handle = mac_handle; 971 brcmf_fws_macdesc_deinit(existing); 972 brcmf_fws_macdesc_set_name(fws, entry); 973 brcmf_fws_unlock(fws->drvr, flags); 974 brcmf_dbg(TRACE, "relocate %s mac %pM\n", entry->name, 975 addr); 976 } else { 977 brcmf_dbg(TRACE, "use existing\n"); 978 WARN_ON(entry->mac_handle != mac_handle); 979 /* TODO: what should we do here: continue, reinit, .. */ 980 } 981 } 982 return 0; 983} 984 985static int brcmf_fws_macdesc_state_indicate(struct brcmf_fws_info *fws, 986 u8 type, u8 *data) 987{ 988 struct brcmf_fws_mac_descriptor *entry; 989 ulong flags; 990 u8 mac_handle; 991 int ret; 992 993 mac_handle = data[0]; 994 entry = &fws->desc.nodes[mac_handle & 0x1F]; 995 if (!entry->occupied) { 996 fws->stats.mac_ps_update_failed++; 997 return -ESRCH; 998 } 999 brcmf_fws_lock(fws->drvr, flags); 1000 /* a state update should wipe old credits */ 1001 entry->requested_credit = 0; 1002 entry->requested_packet = 0; 1003 if (type == BRCMF_FWS_TYPE_MAC_OPEN) { 1004 entry->state = BRCMF_FWS_STATE_OPEN; 1005 ret = BRCMF_FWS_RET_OK_SCHEDULE; 1006 } else { 1007 entry->state = BRCMF_FWS_STATE_CLOSE; 1008 brcmf_fws_tim_update(fws, entry, BRCMF_FWS_FIFO_AC_BK, false); 1009 brcmf_fws_tim_update(fws, entry, BRCMF_FWS_FIFO_AC_BE, false); 1010 brcmf_fws_tim_update(fws, entry, BRCMF_FWS_FIFO_AC_VI, false); 1011 brcmf_fws_tim_update(fws, entry, BRCMF_FWS_FIFO_AC_VO, true); 1012 ret = BRCMF_FWS_RET_OK_NOSCHEDULE; 1013 } 1014 brcmf_fws_unlock(fws->drvr, flags); 1015 return ret; 1016} 1017 1018static int brcmf_fws_interface_state_indicate(struct brcmf_fws_info *fws, 1019 u8 type, u8 *data) 1020{ 1021 struct brcmf_fws_mac_descriptor *entry; 1022 ulong flags; 1023 u8 ifidx; 1024 int ret; 1025 1026 ifidx = data[0]; 1027 1028 if (ifidx >= BRCMF_MAX_IFS) { 1029 ret = -ERANGE; 1030 goto fail; 1031 } 1032 1033 entry = &fws->desc.iface[ifidx]; 1034 if (!entry->occupied) { 1035 ret = -ESRCH; 1036 goto fail; 1037 } 1038 1039 brcmf_dbg(TRACE, "%s (%d): %s\n", brcmf_fws_get_tlv_name(type), type, 1040 entry->name); 1041 brcmf_fws_lock(fws->drvr, flags); 1042 switch (type) { 1043 case BRCMF_FWS_TYPE_INTERFACE_OPEN: 1044 entry->state = BRCMF_FWS_STATE_OPEN; 1045 ret = BRCMF_FWS_RET_OK_SCHEDULE; 1046 break; 1047 case BRCMF_FWS_TYPE_INTERFACE_CLOSE: 1048 entry->state = BRCMF_FWS_STATE_CLOSE; 1049 ret = BRCMF_FWS_RET_OK_NOSCHEDULE; 1050 break; 1051 default: 1052 ret = -EINVAL; 1053 brcmf_fws_unlock(fws->drvr, flags); 1054 goto fail; 1055 } 1056 brcmf_fws_unlock(fws->drvr, flags); 1057 return ret; 1058 1059fail: 1060 fws->stats.if_update_failed++; 1061 return ret; 1062} 1063 1064static int brcmf_fws_request_indicate(struct brcmf_fws_info *fws, u8 type, 1065 u8 *data) 1066{ 1067 struct brcmf_fws_mac_descriptor *entry; 1068 ulong flags; 1069 1070 entry = &fws->desc.nodes[data[1] & 0x1F]; 1071 if (!entry->occupied) { 1072 if (type == BRCMF_FWS_TYPE_MAC_REQUEST_CREDIT) 1073 fws->stats.credit_request_failed++; 1074 else 1075 fws->stats.packet_request_failed++; 1076 return -ESRCH; 1077 } 1078 1079 brcmf_dbg(TRACE, "%s (%d): %s cnt %d bmp %d\n", 1080 brcmf_fws_get_tlv_name(type), type, entry->name, 1081 data[0], data[2]); 1082 brcmf_fws_lock(fws->drvr, flags); 1083 if (type == BRCMF_FWS_TYPE_MAC_REQUEST_CREDIT) 1084 entry->requested_credit = data[0]; 1085 else 1086 entry->requested_packet = data[0]; 1087 1088 entry->ac_bitmap = data[2]; 1089 brcmf_fws_unlock(fws->drvr, flags); 1090 return BRCMF_FWS_RET_OK_SCHEDULE; 1091} 1092 1093static void 1094brcmf_fws_macdesc_use_req_credit(struct brcmf_fws_mac_descriptor *entry, 1095 struct sk_buff *skb) 1096{ 1097 if (entry->requested_credit > 0) { 1098 entry->requested_credit--; 1099 brcmf_skb_if_flags_set_field(skb, REQUESTED, 1); 1100 brcmf_skb_if_flags_set_field(skb, REQ_CREDIT, 1); 1101 if (entry->state != BRCMF_FWS_STATE_CLOSE) 1102 brcmf_err("requested credit set while mac not closed!\n"); 1103 } else if (entry->requested_packet > 0) { 1104 entry->requested_packet--; 1105 brcmf_skb_if_flags_set_field(skb, REQUESTED, 1); 1106 brcmf_skb_if_flags_set_field(skb, REQ_CREDIT, 0); 1107 if (entry->state != BRCMF_FWS_STATE_CLOSE) 1108 brcmf_err("requested packet set while mac not closed!\n"); 1109 } else { 1110 brcmf_skb_if_flags_set_field(skb, REQUESTED, 0); 1111 brcmf_skb_if_flags_set_field(skb, REQ_CREDIT, 0); 1112 } 1113} 1114 1115static void brcmf_fws_macdesc_return_req_credit(struct sk_buff *skb) 1116{ 1117 struct brcmf_fws_mac_descriptor *entry = brcmf_skbcb(skb)->mac; 1118 1119 if ((brcmf_skb_if_flags_get_field(skb, REQ_CREDIT)) && 1120 (entry->state == BRCMF_FWS_STATE_CLOSE)) 1121 entry->requested_credit++; 1122} 1123 1124static void brcmf_fws_return_credits(struct brcmf_fws_info *fws, 1125 u8 fifo, u8 credits) 1126{ 1127 int lender_ac; 1128 int *borrowed; 1129 int *fifo_credit; 1130 1131 if (!credits) 1132 return; 1133 1134 fws->fifo_credit_map |= 1 << fifo; 1135 1136 if ((fifo == BRCMF_FWS_FIFO_AC_BE) && 1137 (fws->credits_borrowed[0])) { 1138 for (lender_ac = BRCMF_FWS_FIFO_AC_VO; lender_ac >= 0; 1139 lender_ac--) { 1140 borrowed = &fws->credits_borrowed[lender_ac]; 1141 if (*borrowed) { 1142 fws->fifo_credit_map |= (1 << lender_ac); 1143 fifo_credit = &fws->fifo_credit[lender_ac]; 1144 if (*borrowed >= credits) { 1145 *borrowed -= credits; 1146 *fifo_credit += credits; 1147 return; 1148 } else { 1149 credits -= *borrowed; 1150 *fifo_credit += *borrowed; 1151 *borrowed = 0; 1152 } 1153 } 1154 } 1155 } 1156 1157 fws->fifo_credit[fifo] += credits; 1158} 1159 1160static void brcmf_fws_schedule_deq(struct brcmf_fws_info *fws) 1161{ 1162 /* only schedule dequeue when there are credits for delayed traffic */ 1163 if (fws->fifo_credit_map & fws->fifo_delay_map) 1164 queue_work(fws->fws_wq, &fws->fws_dequeue_work); 1165} 1166 1167static int brcmf_fws_enq(struct brcmf_fws_info *fws, 1168 enum brcmf_fws_skb_state state, int fifo, 1169 struct sk_buff *p) 1170{ 1171 int prec = 2 * fifo; 1172 u32 *qfull_stat = &fws->stats.delayq_full_error; 1173 1174 struct brcmf_fws_mac_descriptor *entry; 1175 1176 entry = brcmf_skbcb(p)->mac; 1177 if (entry == NULL) { 1178 brcmf_err("no mac descriptor found for skb %p\n", p); 1179 return -ENOENT; 1180 } 1181 1182 brcmf_dbg(DATA, "enter: fifo %d skb %p\n", fifo, p); 1183 if (state == BRCMF_FWS_SKBSTATE_SUPPRESSED) { 1184 prec += 1; 1185 qfull_stat = &fws->stats.supprq_full_error; 1186 } 1187 1188 if (brcmu_pktq_penq(&entry->psq, prec, p) == NULL) { 1189 *qfull_stat += 1; 1190 return -ENFILE; 1191 } 1192 1193 /* increment total enqueued packet count */ 1194 fws->fifo_delay_map |= 1 << fifo; 1195 fws->fifo_enqpkt[fifo]++; 1196 1197 /* update the sk_buff state */ 1198 brcmf_skbcb(p)->state = state; 1199 1200 /* 1201 * A packet has been pushed so update traffic 1202 * availability bitmap, if applicable 1203 */ 1204 brcmf_fws_tim_update(fws, entry, fifo, true); 1205 brcmf_fws_flow_control_check(fws, &entry->psq, 1206 brcmf_skb_if_flags_get_field(p, INDEX)); 1207 return 0; 1208} 1209 1210static struct sk_buff *brcmf_fws_deq(struct brcmf_fws_info *fws, int fifo) 1211{ 1212 struct brcmf_fws_mac_descriptor *table; 1213 struct brcmf_fws_mac_descriptor *entry; 1214 struct sk_buff *p; 1215 int num_nodes; 1216 int node_pos; 1217 int prec_out; 1218 int pmsk; 1219 int i; 1220 1221 table = (struct brcmf_fws_mac_descriptor *)&fws->desc; 1222 num_nodes = sizeof(fws->desc) / sizeof(struct brcmf_fws_mac_descriptor); 1223 node_pos = fws->deq_node_pos[fifo]; 1224 1225 for (i = 0; i < num_nodes; i++) { 1226 entry = &table[(node_pos + i) % num_nodes]; 1227 if (!entry->occupied || 1228 brcmf_fws_macdesc_closed(fws, entry, fifo)) 1229 continue; 1230 1231 if (entry->suppressed) 1232 pmsk = 2; 1233 else 1234 pmsk = 3; 1235 p = brcmu_pktq_mdeq(&entry->psq, pmsk << (fifo * 2), &prec_out); 1236 if (p == NULL) { 1237 if (entry->suppressed) { 1238 if (entry->suppr_transit_count) 1239 continue; 1240 entry->suppressed = false; 1241 p = brcmu_pktq_mdeq(&entry->psq, 1242 1 << (fifo * 2), &prec_out); 1243 } 1244 } 1245 if (p == NULL) 1246 continue; 1247 1248 brcmf_fws_macdesc_use_req_credit(entry, p); 1249 1250 /* move dequeue position to ensure fair round-robin */ 1251 fws->deq_node_pos[fifo] = (node_pos + i + 1) % num_nodes; 1252 brcmf_fws_flow_control_check(fws, &entry->psq, 1253 brcmf_skb_if_flags_get_field(p, 1254 INDEX) 1255 ); 1256 /* 1257 * A packet has been picked up, update traffic 1258 * availability bitmap, if applicable 1259 */ 1260 brcmf_fws_tim_update(fws, entry, fifo, false); 1261 1262 /* 1263 * decrement total enqueued fifo packets and 1264 * clear delay bitmap if done. 1265 */ 1266 fws->fifo_enqpkt[fifo]--; 1267 if (fws->fifo_enqpkt[fifo] == 0) 1268 fws->fifo_delay_map &= ~(1 << fifo); 1269 goto done; 1270 } 1271 p = NULL; 1272done: 1273 brcmf_dbg(DATA, "exit: fifo %d skb %p\n", fifo, p); 1274 return p; 1275} 1276 1277static int brcmf_fws_txstatus_suppressed(struct brcmf_fws_info *fws, int fifo, 1278 struct sk_buff *skb, u32 genbit) 1279{ 1280 struct brcmf_fws_mac_descriptor *entry = brcmf_skbcb(skb)->mac; 1281 u32 hslot; 1282 int ret; 1283 u8 ifidx; 1284 1285 hslot = brcmf_skb_htod_tag_get_field(skb, HSLOT); 1286 1287 /* this packet was suppressed */ 1288 if (!entry->suppressed) { 1289 entry->suppressed = true; 1290 entry->suppr_transit_count = entry->transit_count; 1291 brcmf_dbg(DATA, "suppress %s: transit %d\n", 1292 entry->name, entry->transit_count); 1293 } 1294 1295 entry->generation = genbit; 1296 1297 ret = brcmf_proto_hdrpull(fws->drvr, false, &ifidx, skb); 1298 if (ret == 0) 1299 ret = brcmf_fws_enq(fws, BRCMF_FWS_SKBSTATE_SUPPRESSED, fifo, 1300 skb); 1301 if (ret != 0) { 1302 /* suppress q is full or hdrpull failed, drop this packet */ 1303 brcmf_fws_hanger_poppkt(&fws->hanger, hslot, &skb, 1304 true); 1305 } else { 1306 /* 1307 * Mark suppressed to avoid a double free during 1308 * wlfc cleanup 1309 */ 1310 brcmf_fws_hanger_mark_suppressed(&fws->hanger, hslot); 1311 } 1312 1313 return ret; 1314} 1315 1316static int 1317brcmf_fws_txs_process(struct brcmf_fws_info *fws, u8 flags, u32 hslot, 1318 u32 genbit) 1319{ 1320 u32 fifo; 1321 int ret; 1322 bool remove_from_hanger = true; 1323 struct sk_buff *skb; 1324 struct brcmf_skbuff_cb *skcb; 1325 struct brcmf_fws_mac_descriptor *entry = NULL; 1326 1327 brcmf_dbg(DATA, "flags %d\n", flags); 1328 1329 if (flags == BRCMF_FWS_TXSTATUS_DISCARD) 1330 fws->stats.txs_discard++; 1331 else if (flags == BRCMF_FWS_TXSTATUS_CORE_SUPPRESS) { 1332 fws->stats.txs_supp_core++; 1333 remove_from_hanger = false; 1334 } else if (flags == BRCMF_FWS_TXSTATUS_FW_PS_SUPPRESS) { 1335 fws->stats.txs_supp_ps++; 1336 remove_from_hanger = false; 1337 } else if (flags == BRCMF_FWS_TXSTATUS_FW_TOSSED) 1338 fws->stats.txs_tossed++; 1339 else if (flags == BRCMF_FWS_TXSTATUS_HOST_TOSSED) 1340 fws->stats.txs_host_tossed++; 1341 else 1342 brcmf_err("unexpected txstatus\n"); 1343 1344 ret = brcmf_fws_hanger_poppkt(&fws->hanger, hslot, &skb, 1345 remove_from_hanger); 1346 if (ret != 0) { 1347 brcmf_err("no packet in hanger slot: hslot=%d\n", hslot); 1348 return ret; 1349 } 1350 1351 skcb = brcmf_skbcb(skb); 1352 entry = skcb->mac; 1353 if (WARN_ON(!entry)) { 1354 brcmu_pkt_buf_free_skb(skb); 1355 return -EINVAL; 1356 } 1357 entry->transit_count--; 1358 if (entry->suppressed && entry->suppr_transit_count) 1359 entry->suppr_transit_count--; 1360 1361 brcmf_dbg(DATA, "%s flags %X htod %X\n", entry->name, skcb->if_flags, 1362 skcb->htod); 1363 1364 /* pick up the implicit credit from this packet */ 1365 fifo = brcmf_skb_htod_tag_get_field(skb, FIFO); 1366 if ((fws->fcmode == BRCMF_FWS_FCMODE_IMPLIED_CREDIT) || 1367 (brcmf_skb_if_flags_get_field(skb, REQ_CREDIT)) || 1368 (flags == BRCMF_FWS_TXSTATUS_HOST_TOSSED)) { 1369 brcmf_fws_return_credits(fws, fifo, 1); 1370 brcmf_fws_schedule_deq(fws); 1371 } 1372 brcmf_fws_macdesc_return_req_credit(skb); 1373 1374 if (!remove_from_hanger) 1375 ret = brcmf_fws_txstatus_suppressed(fws, fifo, skb, genbit); 1376 1377 if (remove_from_hanger || ret) 1378 brcmf_txfinalize(fws->drvr, skb, true); 1379 1380 return 0; 1381} 1382 1383static int brcmf_fws_fifocreditback_indicate(struct brcmf_fws_info *fws, 1384 u8 *data) 1385{ 1386 ulong flags; 1387 int i; 1388 1389 if (fws->fcmode != BRCMF_FWS_FCMODE_EXPLICIT_CREDIT) { 1390 brcmf_dbg(INFO, "ignored\n"); 1391 return BRCMF_FWS_RET_OK_NOSCHEDULE; 1392 } 1393 1394 brcmf_dbg(DATA, "enter: data %pM\n", data); 1395 brcmf_fws_lock(fws->drvr, flags); 1396 for (i = 0; i < BRCMF_FWS_FIFO_COUNT; i++) 1397 brcmf_fws_return_credits(fws, i, data[i]); 1398 1399 brcmf_dbg(DATA, "map: credit %x delay %x\n", fws->fifo_credit_map, 1400 fws->fifo_delay_map); 1401 brcmf_fws_unlock(fws->drvr, flags); 1402 return BRCMF_FWS_RET_OK_SCHEDULE; 1403} 1404 1405static int brcmf_fws_txstatus_indicate(struct brcmf_fws_info *fws, u8 *data) 1406{ 1407 ulong lflags; 1408 __le32 status_le; 1409 u32 status; 1410 u32 hslot; 1411 u32 genbit; 1412 u8 flags; 1413 1414 fws->stats.txs_indicate++; 1415 memcpy(&status_le, data, sizeof(status_le)); 1416 status = le32_to_cpu(status_le); 1417 flags = brcmf_txstatus_get_field(status, FLAGS); 1418 hslot = brcmf_txstatus_get_field(status, HSLOT); 1419 genbit = brcmf_txstatus_get_field(status, GENERATION); 1420 1421 brcmf_fws_lock(fws->drvr, lflags); 1422 brcmf_fws_txs_process(fws, flags, hslot, genbit); 1423 brcmf_fws_unlock(fws->drvr, lflags); 1424 return BRCMF_FWS_RET_OK_NOSCHEDULE; 1425} 1426 1427static int brcmf_fws_dbg_seqnum_check(struct brcmf_fws_info *fws, u8 *data) 1428{ 1429 __le32 timestamp; 1430 1431 memcpy(×tamp, &data[2], sizeof(timestamp)); 1432 brcmf_dbg(CTL, "received: seq %d, timestamp %d\n", data[1], 1433 le32_to_cpu(timestamp)); 1434 return 0; 1435} 1436 1437static int brcmf_fws_notify_credit_map(struct brcmf_if *ifp, 1438 const struct brcmf_event_msg *e, 1439 void *data) 1440{ 1441 struct brcmf_fws_info *fws = ifp->drvr->fws; 1442 int i; 1443 ulong flags; 1444 u8 *credits = data; 1445 1446 if (e->datalen < BRCMF_FWS_FIFO_COUNT) { 1447 brcmf_err("event payload too small (%d)\n", e->datalen); 1448 return -EINVAL; 1449 } 1450 if (fws->creditmap_received) 1451 return 0; 1452 1453 fws->creditmap_received = true; 1454 1455 brcmf_dbg(TRACE, "enter: credits %pM\n", credits); 1456 brcmf_fws_lock(ifp->drvr, flags); 1457 for (i = 0; i < ARRAY_SIZE(fws->fifo_credit); i++) { 1458 if (*credits) 1459 fws->fifo_credit_map |= 1 << i; 1460 else 1461 fws->fifo_credit_map &= ~(1 << i); 1462 fws->fifo_credit[i] = *credits++; 1463 } 1464 brcmf_fws_schedule_deq(fws); 1465 brcmf_fws_unlock(ifp->drvr, flags); 1466 return 0; 1467} 1468 1469static int brcmf_fws_notify_bcmc_credit_support(struct brcmf_if *ifp, 1470 const struct brcmf_event_msg *e, 1471 void *data) 1472{ 1473 struct brcmf_fws_info *fws = ifp->drvr->fws; 1474 ulong flags; 1475 1476 brcmf_fws_lock(ifp->drvr, flags); 1477 if (fws) 1478 fws->bcmc_credit_check = true; 1479 brcmf_fws_unlock(ifp->drvr, flags); 1480 return 0; 1481} 1482 1483int brcmf_fws_hdrpull(struct brcmf_pub *drvr, int ifidx, s16 signal_len, 1484 struct sk_buff *skb) 1485{ 1486 struct brcmf_fws_info *fws = drvr->fws; 1487 u8 *signal_data; 1488 s16 data_len; 1489 u8 type; 1490 u8 len; 1491 u8 *data; 1492 s32 status; 1493 s32 err; 1494 1495 brcmf_dbg(HDRS, "enter: ifidx %d, skblen %u, sig %d\n", 1496 ifidx, skb->len, signal_len); 1497 1498 WARN_ON(signal_len > skb->len); 1499 1500 /* if flow control disabled, skip to packet data and leave */ 1501 if (!signal_len || !drvr->fw_signals) { 1502 skb_pull(skb, signal_len); 1503 return 0; 1504 } 1505 1506 fws->stats.header_pulls++; 1507 data_len = signal_len; 1508 signal_data = skb->data; 1509 1510 status = BRCMF_FWS_RET_OK_NOSCHEDULE; 1511 while (data_len > 0) { 1512 /* extract tlv info */ 1513 type = signal_data[0]; 1514 1515 /* FILLER type is actually not a TLV, but 1516 * a single byte that can be skipped. 1517 */ 1518 if (type == BRCMF_FWS_TYPE_FILLER) { 1519 signal_data += 1; 1520 data_len -= 1; 1521 continue; 1522 } 1523 len = signal_data[1]; 1524 data = signal_data + 2; 1525 1526 brcmf_dbg(HDRS, "tlv type=%s (%d), len=%d (%d)\n", 1527 brcmf_fws_get_tlv_name(type), type, len, 1528 brcmf_fws_get_tlv_len(fws, type)); 1529 1530 /* abort parsing when length invalid */ 1531 if (data_len < len + 2) 1532 break; 1533 1534 if (len < brcmf_fws_get_tlv_len(fws, type)) 1535 break; 1536 1537 err = BRCMF_FWS_RET_OK_NOSCHEDULE; 1538 switch (type) { 1539 case BRCMF_FWS_TYPE_HOST_REORDER_RXPKTS: 1540 case BRCMF_FWS_TYPE_COMP_TXSTATUS: 1541 break; 1542 case BRCMF_FWS_TYPE_MACDESC_ADD: 1543 case BRCMF_FWS_TYPE_MACDESC_DEL: 1544 brcmf_fws_macdesc_indicate(fws, type, data); 1545 break; 1546 case BRCMF_FWS_TYPE_MAC_OPEN: 1547 case BRCMF_FWS_TYPE_MAC_CLOSE: 1548 err = brcmf_fws_macdesc_state_indicate(fws, type, data); 1549 break; 1550 case BRCMF_FWS_TYPE_INTERFACE_OPEN: 1551 case BRCMF_FWS_TYPE_INTERFACE_CLOSE: 1552 err = brcmf_fws_interface_state_indicate(fws, type, 1553 data); 1554 break; 1555 case BRCMF_FWS_TYPE_MAC_REQUEST_CREDIT: 1556 case BRCMF_FWS_TYPE_MAC_REQUEST_PACKET: 1557 err = brcmf_fws_request_indicate(fws, type, data); 1558 break; 1559 case BRCMF_FWS_TYPE_TXSTATUS: 1560 brcmf_fws_txstatus_indicate(fws, data); 1561 break; 1562 case BRCMF_FWS_TYPE_FIFO_CREDITBACK: 1563 err = brcmf_fws_fifocreditback_indicate(fws, data); 1564 break; 1565 case BRCMF_FWS_TYPE_RSSI: 1566 brcmf_fws_rssi_indicate(fws, *data); 1567 break; 1568 case BRCMF_FWS_TYPE_TRANS_ID: 1569 brcmf_fws_dbg_seqnum_check(fws, data); 1570 break; 1571 case BRCMF_FWS_TYPE_PKTTAG: 1572 case BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP: 1573 default: 1574 fws->stats.tlv_invalid_type++; 1575 break; 1576 } 1577 if (err == BRCMF_FWS_RET_OK_SCHEDULE) 1578 status = BRCMF_FWS_RET_OK_SCHEDULE; 1579 signal_data += len + 2; 1580 data_len -= len + 2; 1581 } 1582 1583 if (data_len != 0) 1584 fws->stats.tlv_parse_failed++; 1585 1586 if (status == BRCMF_FWS_RET_OK_SCHEDULE) 1587 brcmf_fws_schedule_deq(fws); 1588 1589 /* signalling processing result does 1590 * not affect the actual ethernet packet. 1591 */ 1592 skb_pull(skb, signal_len); 1593 1594 /* this may be a signal-only packet 1595 */ 1596 if (skb->len == 0) 1597 fws->stats.header_only_pkt++; 1598 1599 return 0; 1600} 1601 1602static void brcmf_fws_precommit_skb(struct brcmf_fws_info *fws, int fifo, 1603 struct sk_buff *p) 1604{ 1605 struct brcmf_skbuff_cb *skcb = brcmf_skbcb(p); 1606 struct brcmf_fws_mac_descriptor *entry = skcb->mac; 1607 u8 flags; 1608 1609 brcmf_skb_if_flags_set_field(p, TRANSMIT, 1); 1610 brcmf_skb_htod_tag_set_field(p, GENERATION, entry->generation); 1611 flags = BRCMF_FWS_HTOD_FLAG_PKTFROMHOST; 1612 if (brcmf_skb_if_flags_get_field(p, REQUESTED)) { 1613 /* 1614 * Indicate that this packet is being sent in response to an 1615 * explicit request from the firmware side. 1616 */ 1617 flags |= BRCMF_FWS_HTOD_FLAG_PKT_REQUESTED; 1618 } 1619 brcmf_skb_htod_tag_set_field(p, FLAGS, flags); 1620 brcmf_fws_hdrpush(fws, p); 1621} 1622 1623static void brcmf_fws_rollback_toq(struct brcmf_fws_info *fws, 1624 struct sk_buff *skb, int fifo) 1625{ 1626 struct brcmf_fws_mac_descriptor *entry; 1627 struct sk_buff *pktout; 1628 int qidx, hslot; 1629 int rc = 0; 1630 1631 entry = brcmf_skbcb(skb)->mac; 1632 if (entry->occupied) { 1633 qidx = 2 * fifo; 1634 if (brcmf_skbcb(skb)->state == BRCMF_FWS_SKBSTATE_SUPPRESSED) 1635 qidx++; 1636 1637 pktout = brcmu_pktq_penq_head(&entry->psq, qidx, skb); 1638 if (pktout == NULL) { 1639 brcmf_err("%s queue %d full\n", entry->name, qidx); 1640 rc = -ENOSPC; 1641 } 1642 } else { 1643 brcmf_err("%s entry removed\n", entry->name); 1644 rc = -ENOENT; 1645 } 1646 1647 if (rc) { 1648 fws->stats.rollback_failed++; 1649 hslot = brcmf_skb_htod_tag_get_field(skb, HSLOT); 1650 brcmf_fws_txs_process(fws, BRCMF_FWS_TXSTATUS_HOST_TOSSED, 1651 hslot, 0); 1652 } else { 1653 fws->stats.rollback_success++; 1654 brcmf_fws_return_credits(fws, fifo, 1); 1655 brcmf_fws_macdesc_return_req_credit(skb); 1656 } 1657} 1658 1659static int brcmf_fws_borrow_credit(struct brcmf_fws_info *fws) 1660{ 1661 int lender_ac; 1662 1663 if (time_after(fws->borrow_defer_timestamp, jiffies)) { 1664 fws->fifo_credit_map &= ~(1 << BRCMF_FWS_FIFO_AC_BE); 1665 return -ENAVAIL; 1666 } 1667 1668 for (lender_ac = 0; lender_ac <= BRCMF_FWS_FIFO_AC_VO; lender_ac++) { 1669 if (fws->fifo_credit[lender_ac]) { 1670 fws->credits_borrowed[lender_ac]++; 1671 fws->fifo_credit[lender_ac]--; 1672 if (fws->fifo_credit[lender_ac] == 0) 1673 fws->fifo_credit_map &= ~(1 << lender_ac); 1674 fws->fifo_credit_map |= (1 << BRCMF_FWS_FIFO_AC_BE); 1675 brcmf_dbg(DATA, "borrow credit from: %d\n", lender_ac); 1676 return 0; 1677 } 1678 } 1679 fws->fifo_credit_map &= ~(1 << BRCMF_FWS_FIFO_AC_BE); 1680 return -ENAVAIL; 1681} 1682 1683static int brcmf_fws_commit_skb(struct brcmf_fws_info *fws, int fifo, 1684 struct sk_buff *skb) 1685{ 1686 struct brcmf_skbuff_cb *skcb = brcmf_skbcb(skb); 1687 struct brcmf_fws_mac_descriptor *entry; 1688 struct brcmf_bus *bus = fws->drvr->bus_if; 1689 int rc; 1690 u8 ifidx; 1691 1692 entry = skcb->mac; 1693 if (IS_ERR(entry)) 1694 return PTR_ERR(entry); 1695 1696 brcmf_fws_precommit_skb(fws, fifo, skb); 1697 rc = brcmf_bus_txdata(bus, skb); 1698 brcmf_dbg(DATA, "%s flags %X htod %X bus_tx %d\n", entry->name, 1699 skcb->if_flags, skcb->htod, rc); 1700 if (rc < 0) { 1701 brcmf_proto_hdrpull(fws->drvr, false, &ifidx, skb); 1702 goto rollback; 1703 } 1704 1705 entry->transit_count++; 1706 if (entry->suppressed) 1707 entry->suppr_transit_count++; 1708 fws->stats.pkt2bus++; 1709 fws->stats.send_pkts[fifo]++; 1710 if (brcmf_skb_if_flags_get_field(skb, REQUESTED)) 1711 fws->stats.requested_sent[fifo]++; 1712 1713 return rc; 1714 1715rollback: 1716 brcmf_fws_rollback_toq(fws, skb, fifo); 1717 return rc; 1718} 1719 1720static int brcmf_fws_assign_htod(struct brcmf_fws_info *fws, struct sk_buff *p, 1721 int fifo) 1722{ 1723 struct brcmf_skbuff_cb *skcb = brcmf_skbcb(p); 1724 int rc, hslot; 1725 1726 hslot = brcmf_fws_hanger_get_free_slot(&fws->hanger); 1727 brcmf_skb_htod_tag_set_field(p, HSLOT, hslot); 1728 brcmf_skb_htod_tag_set_field(p, FREERUN, skcb->mac->seq[fifo]); 1729 brcmf_skb_htod_tag_set_field(p, FIFO, fifo); 1730 rc = brcmf_fws_hanger_pushpkt(&fws->hanger, p, hslot); 1731 if (!rc) 1732 skcb->mac->seq[fifo]++; 1733 else 1734 fws->stats.generic_error++; 1735 return rc; 1736} 1737 1738int brcmf_fws_process_skb(struct brcmf_if *ifp, struct sk_buff *skb) 1739{ 1740 struct brcmf_pub *drvr = ifp->drvr; 1741 struct brcmf_fws_info *fws = drvr->fws; 1742 struct brcmf_skbuff_cb *skcb = brcmf_skbcb(skb); 1743 struct ethhdr *eh = (struct ethhdr *)(skb->data); 1744 ulong flags; 1745 int fifo = BRCMF_FWS_FIFO_BCMC; 1746 bool multicast = is_multicast_ether_addr(eh->h_dest); 1747 bool pae = eh->h_proto == htons(ETH_P_PAE); 1748 1749 /* determine the priority */ 1750 if (!skb->priority) 1751 skb->priority = cfg80211_classify8021d(skb); 1752 1753 drvr->tx_multicast += !!multicast; 1754 if (pae) 1755 atomic_inc(&ifp->pend_8021x_cnt); 1756 1757 if (!brcmf_fws_fc_active(fws)) { 1758 /* If the protocol uses a data header, apply it */ 1759 brcmf_proto_hdrpush(drvr, ifp->ifidx, 0, skb); 1760 1761 /* Use bus module to send data frame */ 1762 return brcmf_bus_txdata(drvr->bus_if, skb); 1763 } 1764 1765 /* set control buffer information */ 1766 skcb->if_flags = 0; 1767 skcb->state = BRCMF_FWS_SKBSTATE_NEW; 1768 brcmf_skb_if_flags_set_field(skb, INDEX, ifp->ifidx); 1769 if (!multicast) 1770 fifo = brcmf_fws_prio2fifo[skb->priority]; 1771 1772 brcmf_fws_lock(drvr, flags); 1773 if (fifo != BRCMF_FWS_FIFO_AC_BE && fifo < BRCMF_FWS_FIFO_BCMC) 1774 fws->borrow_defer_timestamp = jiffies + 1775 BRCMF_FWS_BORROW_DEFER_PERIOD; 1776 1777 skcb->mac = brcmf_fws_macdesc_find(fws, ifp, eh->h_dest); 1778 brcmf_dbg(DATA, "%s mac %pM multi %d fifo %d\n", skcb->mac->name, 1779 eh->h_dest, multicast, fifo); 1780 if (!brcmf_fws_assign_htod(fws, skb, fifo)) { 1781 brcmf_fws_enq(fws, BRCMF_FWS_SKBSTATE_DELAYED, fifo, skb); 1782 brcmf_fws_schedule_deq(fws); 1783 } else { 1784 brcmf_err("drop skb: no hanger slot\n"); 1785 if (pae) { 1786 atomic_dec(&ifp->pend_8021x_cnt); 1787 if (waitqueue_active(&ifp->pend_8021x_wait)) 1788 wake_up(&ifp->pend_8021x_wait); 1789 } 1790 brcmu_pkt_buf_free_skb(skb); 1791 } 1792 brcmf_fws_unlock(drvr, flags); 1793 return 0; 1794} 1795 1796void brcmf_fws_reset_interface(struct brcmf_if *ifp) 1797{ 1798 struct brcmf_fws_mac_descriptor *entry = ifp->fws_desc; 1799 1800 brcmf_dbg(TRACE, "enter: idx=%d\n", ifp->bssidx); 1801 if (!entry) 1802 return; 1803 1804 brcmf_fws_macdesc_init(entry, ifp->mac_addr, ifp->ifidx); 1805} 1806 1807void brcmf_fws_add_interface(struct brcmf_if *ifp) 1808{ 1809 struct brcmf_fws_info *fws = ifp->drvr->fws; 1810 struct brcmf_fws_mac_descriptor *entry; 1811 1812 if (!ifp->ndev || !ifp->drvr->fw_signals) 1813 return; 1814 1815 entry = &fws->desc.iface[ifp->ifidx]; 1816 ifp->fws_desc = entry; 1817 brcmf_fws_macdesc_init(entry, ifp->mac_addr, ifp->ifidx); 1818 brcmf_fws_macdesc_set_name(fws, entry); 1819 brcmu_pktq_init(&entry->psq, BRCMF_FWS_PSQ_PREC_COUNT, 1820 BRCMF_FWS_PSQ_LEN); 1821 brcmf_dbg(TRACE, "added %s\n", entry->name); 1822} 1823 1824void brcmf_fws_del_interface(struct brcmf_if *ifp) 1825{ 1826 struct brcmf_fws_mac_descriptor *entry = ifp->fws_desc; 1827 ulong flags; 1828 1829 if (!entry) 1830 return; 1831 1832 brcmf_fws_lock(ifp->drvr, flags); 1833 ifp->fws_desc = NULL; 1834 brcmf_dbg(TRACE, "deleting %s\n", entry->name); 1835 brcmf_fws_macdesc_deinit(entry); 1836 brcmf_fws_cleanup(ifp->drvr->fws, ifp->ifidx); 1837 brcmf_fws_unlock(ifp->drvr, flags); 1838} 1839 1840static void brcmf_fws_dequeue_worker(struct work_struct *worker) 1841{ 1842 struct brcmf_fws_info *fws; 1843 struct sk_buff *skb; 1844 ulong flags; 1845 int fifo; 1846 1847 fws = container_of(worker, struct brcmf_fws_info, fws_dequeue_work); 1848 1849 brcmf_fws_lock(fws->drvr, flags); 1850 for (fifo = BRCMF_FWS_FIFO_BCMC; fifo >= 0 && !fws->bus_flow_blocked; 1851 fifo--) { 1852 while ((fws->fifo_credit[fifo]) || ((!fws->bcmc_credit_check) && 1853 (fifo == BRCMF_FWS_FIFO_BCMC))) { 1854 skb = brcmf_fws_deq(fws, fifo); 1855 if (!skb) 1856 break; 1857 fws->fifo_credit[fifo]--; 1858 if (brcmf_fws_commit_skb(fws, fifo, skb)) 1859 break; 1860 if (fws->bus_flow_blocked) 1861 break; 1862 } 1863 if ((fifo == BRCMF_FWS_FIFO_AC_BE) && 1864 (fws->fifo_credit[fifo] == 0) && 1865 (!fws->bus_flow_blocked)) { 1866 while (brcmf_fws_borrow_credit(fws) == 0) { 1867 skb = brcmf_fws_deq(fws, fifo); 1868 if (!skb) { 1869 brcmf_fws_return_credits(fws, fifo, 1); 1870 break; 1871 } 1872 if (brcmf_fws_commit_skb(fws, fifo, skb)) 1873 break; 1874 if (fws->bus_flow_blocked) 1875 break; 1876 } 1877 } 1878 } 1879 brcmf_fws_unlock(fws->drvr, flags); 1880} 1881 1882int brcmf_fws_init(struct brcmf_pub *drvr) 1883{ 1884 u32 tlv = BRCMF_FWS_FLAGS_RSSI_SIGNALS; 1885 int rc; 1886 1887 if (!drvr->fw_signals) 1888 return 0; 1889 1890 spin_lock_init(&drvr->fws_spinlock); 1891 1892 drvr->fws = kzalloc(sizeof(*(drvr->fws)), GFP_KERNEL); 1893 if (!drvr->fws) { 1894 rc = -ENOMEM; 1895 goto fail; 1896 } 1897 1898 /* set linkage back */ 1899 drvr->fws->drvr = drvr; 1900 drvr->fws->fcmode = fcmode; 1901 1902 drvr->fws->fws_wq = create_singlethread_workqueue("brcmf_fws_wq"); 1903 if (drvr->fws->fws_wq == NULL) { 1904 brcmf_err("workqueue creation failed\n"); 1905 rc = -EBADF; 1906 goto fail; 1907 } 1908 INIT_WORK(&drvr->fws->fws_dequeue_work, brcmf_fws_dequeue_worker); 1909 1910 /* enable firmware signalling if fcmode active */ 1911 if (drvr->fws->fcmode != BRCMF_FWS_FCMODE_NONE) 1912 tlv |= BRCMF_FWS_FLAGS_XONXOFF_SIGNALS | 1913 BRCMF_FWS_FLAGS_CREDIT_STATUS_SIGNALS | 1914 BRCMF_FWS_FLAGS_HOST_PROPTXSTATUS_ACTIVE; 1915 1916 rc = brcmf_fweh_register(drvr, BRCMF_E_FIFO_CREDIT_MAP, 1917 brcmf_fws_notify_credit_map); 1918 if (rc < 0) { 1919 brcmf_err("register credit map handler failed\n"); 1920 goto fail; 1921 } 1922 rc = brcmf_fweh_register(drvr, BRCMF_E_BCMC_CREDIT_SUPPORT, 1923 brcmf_fws_notify_bcmc_credit_support); 1924 if (rc < 0) { 1925 brcmf_err("register bcmc credit handler failed\n"); 1926 brcmf_fweh_unregister(drvr, BRCMF_E_FIFO_CREDIT_MAP); 1927 goto fail; 1928 } 1929 1930 /* setting the iovar may fail if feature is unsupported 1931 * so leave the rc as is so driver initialization can 1932 * continue. 1933 */ 1934 if (brcmf_fil_iovar_int_set(drvr->iflist[0], "tlv", tlv)) { 1935 brcmf_err("failed to set bdcv2 tlv signaling\n"); 1936 goto fail_event; 1937 } 1938 1939 brcmf_fws_hanger_init(&drvr->fws->hanger); 1940 brcmf_fws_macdesc_init(&drvr->fws->desc.other, NULL, 0); 1941 brcmf_fws_macdesc_set_name(drvr->fws, &drvr->fws->desc.other); 1942 brcmu_pktq_init(&drvr->fws->desc.other.psq, BRCMF_FWS_PSQ_PREC_COUNT, 1943 BRCMF_FWS_PSQ_LEN); 1944 1945 /* create debugfs file for statistics */ 1946 brcmf_debugfs_create_fws_stats(drvr, &drvr->fws->stats); 1947 1948 brcmf_dbg(INFO, "%s bdcv2 tlv signaling [%x]\n", 1949 drvr->fw_signals ? "enabled" : "disabled", tlv); 1950 return 0; 1951 1952fail_event: 1953 brcmf_fweh_unregister(drvr, BRCMF_E_BCMC_CREDIT_SUPPORT); 1954 brcmf_fweh_unregister(drvr, BRCMF_E_FIFO_CREDIT_MAP); 1955fail: 1956 brcmf_fws_deinit(drvr); 1957 return rc; 1958} 1959 1960void brcmf_fws_deinit(struct brcmf_pub *drvr) 1961{ 1962 struct brcmf_fws_info *fws = drvr->fws; 1963 ulong flags; 1964 1965 if (!fws) 1966 return; 1967 1968 /* disable firmware signalling entirely 1969 * to avoid using the workqueue. 1970 */ 1971 drvr->fw_signals = false; 1972 1973 if (drvr->fws->fws_wq) 1974 destroy_workqueue(drvr->fws->fws_wq); 1975 1976 /* cleanup */ 1977 brcmf_fws_lock(drvr, flags); 1978 brcmf_fws_cleanup(fws, -1); 1979 drvr->fws = NULL; 1980 brcmf_fws_unlock(drvr, flags); 1981 1982 /* free top structure */ 1983 kfree(fws); 1984} 1985 1986bool brcmf_fws_fc_active(struct brcmf_fws_info *fws) 1987{ 1988 if (!fws) 1989 return false; 1990 1991 return fws->fcmode != BRCMF_FWS_FCMODE_NONE; 1992} 1993 1994void brcmf_fws_bustxfail(struct brcmf_fws_info *fws, struct sk_buff *skb) 1995{ 1996 ulong flags; 1997 u32 hslot; 1998 1999 if (brcmf_skbcb(skb)->state == BRCMF_FWS_SKBSTATE_TIM) { 2000 brcmu_pkt_buf_free_skb(skb); 2001 return; 2002 } 2003 brcmf_fws_lock(fws->drvr, flags); 2004 hslot = brcmf_skb_htod_tag_get_field(skb, HSLOT); 2005 brcmf_fws_txs_process(fws, BRCMF_FWS_TXSTATUS_HOST_TOSSED, hslot, 0); 2006 brcmf_fws_unlock(fws->drvr, flags); 2007} 2008 2009void brcmf_fws_bus_blocked(struct brcmf_pub *drvr, bool flow_blocked) 2010{ 2011 struct brcmf_fws_info *fws = drvr->fws; 2012 2013 fws->bus_flow_blocked = flow_blocked; 2014 if (!flow_blocked) 2015 brcmf_fws_schedule_deq(fws); 2016 else 2017 fws->stats.bus_flow_block++; 2018} 2019