fwsignal.c revision 8071fd61b421f5c9b9a67a7c222c1f5581bcf0f3
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 <uapi/linux/nl80211.h> 26#include <net/cfg80211.h> 27 28#include <brcmu_utils.h> 29#include <brcmu_wifi.h> 30#include "dhd.h" 31#include "dhd_proto.h" 32#include "dhd_dbg.h" 33#include "dhd_bus.h" 34#include "fwil.h" 35#include "fwil_types.h" 36#include "fweh.h" 37#include "fwsignal.h" 38#include "p2p.h" 39#include "wl_cfg80211.h" 40 41/** 42 * DOC: Firmware Signalling 43 * 44 * Firmware can send signals to host and vice versa, which are passed in the 45 * data packets using TLV based header. This signalling layer is on top of the 46 * BDC bus protocol layer. 47 */ 48 49/* 50 * single definition for firmware-driver flow control tlv's. 51 * 52 * each tlv is specified by BRCMF_FWS_TLV_DEF(name, ID, length). 53 * A length value 0 indicates variable length tlv. 54 */ 55#define BRCMF_FWS_TLV_DEFLIST \ 56 BRCMF_FWS_TLV_DEF(MAC_OPEN, 1, 1) \ 57 BRCMF_FWS_TLV_DEF(MAC_CLOSE, 2, 1) \ 58 BRCMF_FWS_TLV_DEF(MAC_REQUEST_CREDIT, 3, 2) \ 59 BRCMF_FWS_TLV_DEF(TXSTATUS, 4, 4) \ 60 BRCMF_FWS_TLV_DEF(PKTTAG, 5, 4) \ 61 BRCMF_FWS_TLV_DEF(MACDESC_ADD, 6, 8) \ 62 BRCMF_FWS_TLV_DEF(MACDESC_DEL, 7, 8) \ 63 BRCMF_FWS_TLV_DEF(RSSI, 8, 1) \ 64 BRCMF_FWS_TLV_DEF(INTERFACE_OPEN, 9, 1) \ 65 BRCMF_FWS_TLV_DEF(INTERFACE_CLOSE, 10, 1) \ 66 BRCMF_FWS_TLV_DEF(FIFO_CREDITBACK, 11, 6) \ 67 BRCMF_FWS_TLV_DEF(PENDING_TRAFFIC_BMP, 12, 2) \ 68 BRCMF_FWS_TLV_DEF(MAC_REQUEST_PACKET, 13, 3) \ 69 BRCMF_FWS_TLV_DEF(HOST_REORDER_RXPKTS, 14, 10) \ 70 BRCMF_FWS_TLV_DEF(TRANS_ID, 18, 6) \ 71 BRCMF_FWS_TLV_DEF(COMP_TXSTATUS, 19, 1) \ 72 BRCMF_FWS_TLV_DEF(FILLER, 255, 0) 73 74/* 75 * enum brcmf_fws_tlv_type - definition of tlv identifiers. 76 */ 77#define BRCMF_FWS_TLV_DEF(name, id, len) \ 78 BRCMF_FWS_TYPE_ ## name = id, 79enum brcmf_fws_tlv_type { 80 BRCMF_FWS_TLV_DEFLIST 81 BRCMF_FWS_TYPE_INVALID 82}; 83#undef BRCMF_FWS_TLV_DEF 84 85/* 86 * enum brcmf_fws_tlv_len - definition of tlv lengths. 87 */ 88#define BRCMF_FWS_TLV_DEF(name, id, len) \ 89 BRCMF_FWS_TYPE_ ## name ## _LEN = (len), 90enum brcmf_fws_tlv_len { 91 BRCMF_FWS_TLV_DEFLIST 92}; 93#undef BRCMF_FWS_TLV_DEF 94 95#ifdef DEBUG 96/* 97 * brcmf_fws_tlv_names - array of tlv names. 98 */ 99#define BRCMF_FWS_TLV_DEF(name, id, len) \ 100 { id, #name }, 101static struct { 102 enum brcmf_fws_tlv_type id; 103 const char *name; 104} brcmf_fws_tlv_names[] = { 105 BRCMF_FWS_TLV_DEFLIST 106}; 107#undef BRCMF_FWS_TLV_DEF 108 109static const char *brcmf_fws_get_tlv_name(enum brcmf_fws_tlv_type id) 110{ 111 int i; 112 113 for (i = 0; i < ARRAY_SIZE(brcmf_fws_tlv_names); i++) 114 if (brcmf_fws_tlv_names[i].id == id) 115 return brcmf_fws_tlv_names[i].name; 116 117 return "INVALID"; 118} 119#else 120static const char *brcmf_fws_get_tlv_name(enum brcmf_fws_tlv_type id) 121{ 122 return "NODEBUG"; 123} 124#endif /* DEBUG */ 125 126/* 127 * flags used to enable tlv signalling from firmware. 128 */ 129#define BRCMF_FWS_FLAGS_RSSI_SIGNALS 0x0001 130#define BRCMF_FWS_FLAGS_XONXOFF_SIGNALS 0x0002 131#define BRCMF_FWS_FLAGS_CREDIT_STATUS_SIGNALS 0x0004 132#define BRCMF_FWS_FLAGS_HOST_PROPTXSTATUS_ACTIVE 0x0008 133#define BRCMF_FWS_FLAGS_PSQ_GENERATIONFSM_ENABLE 0x0010 134#define BRCMF_FWS_FLAGS_PSQ_ZERO_BUFFER_ENABLE 0x0020 135#define BRCMF_FWS_FLAGS_HOST_RXREORDER_ACTIVE 0x0040 136 137#define BRCMF_FWS_MAC_DESC_TABLE_SIZE 32 138#define BRCMF_FWS_MAC_DESC_ID_INVALID 0xff 139 140#define BRCMF_FWS_HOSTIF_FLOWSTATE_OFF 0 141#define BRCMF_FWS_HOSTIF_FLOWSTATE_ON 1 142#define BRCMF_FWS_FLOWCONTROL_HIWATER 128 143#define BRCMF_FWS_FLOWCONTROL_LOWATER 64 144 145#define BRCMF_FWS_PSQ_PREC_COUNT ((NL80211_NUM_ACS + 1) * 2) 146#define BRCMF_FWS_PSQ_LEN 256 147 148#define BRCMF_FWS_HTOD_FLAG_PKTFROMHOST 0x01 149#define BRCMF_FWS_HTOD_FLAG_PKT_REQUESTED 0x02 150 151#define BRCMF_FWS_RET_OK_NOSCHEDULE 0 152#define BRCMF_FWS_RET_OK_SCHEDULE 1 153 154/** 155 * enum brcmf_fws_skb_state - indicates processing state of skb. 156 * 157 * @BRCMF_FWS_SKBSTATE_NEW: sk_buff is newly arrived in the driver. 158 * @BRCMF_FWS_SKBSTATE_DELAYED: sk_buff had to wait on queue. 159 * @BRCMF_FWS_SKBSTATE_SUPPRESSED: sk_buff has been suppressed by firmware. 160 */ 161enum brcmf_fws_skb_state { 162 BRCMF_FWS_SKBSTATE_NEW, 163 BRCMF_FWS_SKBSTATE_DELAYED, 164 BRCMF_FWS_SKBSTATE_SUPPRESSED 165}; 166 167/** 168 * struct brcmf_skbuff_cb - control buffer associated with skbuff. 169 * 170 * @if_flags: holds interface index and packet related flags. 171 * @htod: host to device packet identifier (used in PKTTAG tlv). 172 * @state: transmit state of the packet. 173 * @mac: descriptor related to destination for this packet. 174 * 175 * This information is stored in control buffer struct sk_buff::cb, which 176 * provides 48 bytes of storage so this structure should not exceed that. 177 */ 178struct brcmf_skbuff_cb { 179 u16 if_flags; 180 u32 htod; 181 enum brcmf_fws_skb_state state; 182 struct brcmf_fws_mac_descriptor *mac; 183}; 184 185/* 186 * macro casting skbuff control buffer to struct brcmf_skbuff_cb. 187 */ 188#define brcmf_skbcb(skb) ((struct brcmf_skbuff_cb *)((skb)->cb)) 189 190/* 191 * sk_buff control if flags 192 * 193 * b[12] - packet sent upon credit request. 194 * b[11] - packet sent upon packet request. 195 * b[10] - packet only contains signalling data. 196 * b[9] - packet is a tx packet. 197 * b[8] - packet uses FIFO credit (non-pspoll). 198 * b[7] - interface in AP mode. 199 * b[3:0] - interface index. 200 */ 201#define BRCMF_SKB_IF_FLAGS_REQ_CREDIT_MASK 0x1000 202#define BRCMF_SKB_IF_FLAGS_REQ_CREDIT_SHIFT 12 203#define BRCMF_SKB_IF_FLAGS_REQUESTED_MASK 0x0800 204#define BRCMF_SKB_IF_FLAGS_REQUESTED_SHIFT 11 205#define BRCMF_SKB_IF_FLAGS_SIGNAL_ONLY_MASK 0x0400 206#define BRCMF_SKB_IF_FLAGS_SIGNAL_ONLY_SHIFT 10 207#define BRCMF_SKB_IF_FLAGS_TRANSMIT_MASK 0x0200 208#define BRCMF_SKB_IF_FLAGS_TRANSMIT_SHIFT 9 209#define BRCMF_SKB_IF_FLAGS_CREDITCHECK_MASK 0x0100 210#define BRCMF_SKB_IF_FLAGS_CREDITCHECK_SHIFT 8 211#define BRCMF_SKB_IF_FLAGS_IF_AP_MASK 0x0080 212#define BRCMF_SKB_IF_FLAGS_IF_AP_SHIFT 7 213#define BRCMF_SKB_IF_FLAGS_INDEX_MASK 0x000f 214#define BRCMF_SKB_IF_FLAGS_INDEX_SHIFT 0 215 216#define brcmf_skb_if_flags_set_field(skb, field, value) \ 217 brcmu_maskset16(&(brcmf_skbcb(skb)->if_flags), \ 218 BRCMF_SKB_IF_FLAGS_ ## field ## _MASK, \ 219 BRCMF_SKB_IF_FLAGS_ ## field ## _SHIFT, (value)) 220#define brcmf_skb_if_flags_get_field(skb, field) \ 221 brcmu_maskget16(brcmf_skbcb(skb)->if_flags, \ 222 BRCMF_SKB_IF_FLAGS_ ## field ## _MASK, \ 223 BRCMF_SKB_IF_FLAGS_ ## field ## _SHIFT) 224 225/* 226 * sk_buff control packet identifier 227 * 228 * 32-bit packet identifier used in PKTTAG tlv from host to dongle. 229 * 230 * - Generated at the host (e.g. dhd) 231 * - Seen as a generic sequence number by firmware except for the flags field. 232 * 233 * Generation : b[31] => generation number for this packet [host->fw] 234 * OR, current generation number [fw->host] 235 * Flags : b[30:27] => command, status flags 236 * FIFO-AC : b[26:24] => AC-FIFO id 237 * h-slot : b[23:8] => hanger-slot 238 * freerun : b[7:0] => A free running counter 239 */ 240#define BRCMF_SKB_HTOD_TAG_GENERATION_MASK 0x80000000 241#define BRCMF_SKB_HTOD_TAG_GENERATION_SHIFT 31 242#define BRCMF_SKB_HTOD_TAG_FLAGS_MASK 0x78000000 243#define BRCMF_SKB_HTOD_TAG_FLAGS_SHIFT 27 244#define BRCMF_SKB_HTOD_TAG_FIFO_MASK 0x07000000 245#define BRCMF_SKB_HTOD_TAG_FIFO_SHIFT 24 246#define BRCMF_SKB_HTOD_TAG_HSLOT_MASK 0x00ffff00 247#define BRCMF_SKB_HTOD_TAG_HSLOT_SHIFT 8 248#define BRCMF_SKB_HTOD_TAG_FREERUN_MASK 0x000000ff 249#define BRCMF_SKB_HTOD_TAG_FREERUN_SHIFT 0 250 251#define brcmf_skb_htod_tag_set_field(skb, field, value) \ 252 brcmu_maskset32(&(brcmf_skbcb(skb)->htod), \ 253 BRCMF_SKB_HTOD_TAG_ ## field ## _MASK, \ 254 BRCMF_SKB_HTOD_TAG_ ## field ## _SHIFT, (value)) 255#define brcmf_skb_htod_tag_get_field(skb, field) \ 256 brcmu_maskget32(brcmf_skbcb(skb)->htod, \ 257 BRCMF_SKB_HTOD_TAG_ ## field ## _MASK, \ 258 BRCMF_SKB_HTOD_TAG_ ## field ## _SHIFT) 259 260#define BRCMF_FWS_TXSTAT_GENERATION_MASK 0x80000000 261#define BRCMF_FWS_TXSTAT_GENERATION_SHIFT 31 262#define BRCMF_FWS_TXSTAT_FLAGS_MASK 0x78000000 263#define BRCMF_FWS_TXSTAT_FLAGS_SHIFT 27 264#define BRCMF_FWS_TXSTAT_FIFO_MASK 0x07000000 265#define BRCMF_FWS_TXSTAT_FIFO_SHIFT 24 266#define BRCMF_FWS_TXSTAT_HSLOT_MASK 0x00FFFF00 267#define BRCMF_FWS_TXSTAT_HSLOT_SHIFT 8 268#define BRCMF_FWS_TXSTAT_PKTID_MASK 0x00FFFFFF 269#define BRCMF_FWS_TXSTAT_PKTID_SHIFT 0 270 271#define brcmf_txstatus_get_field(txs, field) \ 272 brcmu_maskget32(txs, BRCMF_FWS_TXSTAT_ ## field ## _MASK, \ 273 BRCMF_FWS_TXSTAT_ ## field ## _SHIFT) 274 275/* How long to defer borrowing in jiffies */ 276#define BRCMF_FWS_BORROW_DEFER_PERIOD (HZ / 10) 277 278/** 279 * enum brcmf_fws_fifo - fifo indices used by dongle firmware. 280 * 281 * @BRCMF_FWS_FIFO_AC_BK: fifo for background traffic. 282 * @BRCMF_FWS_FIFO_AC_BE: fifo for best-effort traffic. 283 * @BRCMF_FWS_FIFO_AC_VI: fifo for video traffic. 284 * @BRCMF_FWS_FIFO_AC_VO: fifo for voice traffic. 285 * @BRCMF_FWS_FIFO_BCMC: fifo for broadcast/multicast (AP only). 286 * @BRCMF_FWS_FIFO_ATIM: fifo for ATIM (AP only). 287 * @BRCMF_FWS_FIFO_COUNT: number of fifos. 288 */ 289enum brcmf_fws_fifo { 290 BRCMF_FWS_FIFO_AC_BK, 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 */ 311enum brcmf_fws_txstatus { 312 BRCMF_FWS_TXSTATUS_DISCARD, 313 BRCMF_FWS_TXSTATUS_CORE_SUPPRESS, 314 BRCMF_FWS_TXSTATUS_FW_PS_SUPPRESS, 315 BRCMF_FWS_TXSTATUS_FW_TOSSED 316}; 317 318enum brcmf_fws_fcmode { 319 BRCMF_FWS_FCMODE_NONE, 320 BRCMF_FWS_FCMODE_IMPLIED_CREDIT, 321 BRCMF_FWS_FCMODE_EXPLICIT_CREDIT 322}; 323 324enum brcmf_fws_mac_desc_state { 325 BRCMF_FWS_STATE_OPEN = 1, 326 BRCMF_FWS_STATE_CLOSE 327}; 328 329/** 330 * struct brcmf_fws_mac_descriptor - firmware signalling data per node/interface 331 * 332 * @occupied: slot is in use. 333 * @mac_handle: handle for mac entry determined by firmware. 334 * @interface_id: interface index. 335 * @state: current state. 336 * @suppressed: mac entry is suppressed. 337 * @generation: generation bit. 338 * @ac_bitmap: ac queue bitmap. 339 * @requested_credit: credits requested by firmware. 340 * @ea: ethernet address. 341 * @seq: per-node free-running sequence. 342 * @psq: power-save queue. 343 * @transit_count: packet in transit to firmware. 344 */ 345struct brcmf_fws_mac_descriptor { 346 char name[16]; 347 u8 occupied; 348 u8 mac_handle; 349 u8 interface_id; 350 u8 state; 351 bool suppressed; 352 u8 generation; 353 u8 ac_bitmap; 354 u8 requested_credit; 355 u8 requested_packet; 356 u8 ea[ETH_ALEN]; 357 u8 seq[BRCMF_FWS_FIFO_COUNT]; 358 struct pktq psq; 359 int transit_count; 360 int suppress_count; 361 int suppr_transit_count; 362 bool send_tim_signal; 363 u8 traffic_pending_bmp; 364 u8 traffic_lastreported_bmp; 365}; 366 367#define BRCMF_FWS_HANGER_MAXITEMS 1024 368 369/** 370 * enum brcmf_fws_hanger_item_state - state of hanger item. 371 * 372 * @BRCMF_FWS_HANGER_ITEM_STATE_FREE: item is free for use. 373 * @BRCMF_FWS_HANGER_ITEM_STATE_INUSE: item is in use. 374 * @BRCMF_FWS_HANGER_ITEM_STATE_INUSE_SUPPRESSED: item was suppressed. 375 */ 376enum brcmf_fws_hanger_item_state { 377 BRCMF_FWS_HANGER_ITEM_STATE_FREE = 1, 378 BRCMF_FWS_HANGER_ITEM_STATE_INUSE, 379 BRCMF_FWS_HANGER_ITEM_STATE_INUSE_SUPPRESSED 380}; 381 382 383/** 384 * struct brcmf_fws_hanger_item - single entry for tx pending packet. 385 * 386 * @state: entry is either free or occupied. 387 * @gen: generation. 388 * @pkt: packet itself. 389 */ 390struct brcmf_fws_hanger_item { 391 enum brcmf_fws_hanger_item_state state; 392 u8 gen; 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 struct brcmf_fws_macdesc_table desc; 429 struct workqueue_struct *fws_wq; 430 struct work_struct fws_dequeue_work; 431 u32 fifo_enqpkt[BRCMF_FWS_FIFO_COUNT]; 432 int fifo_credit[BRCMF_FWS_FIFO_COUNT]; 433 int credits_borrowed[BRCMF_FWS_FIFO_AC_VO + 1]; 434 int deq_node_pos[BRCMF_FWS_FIFO_COUNT]; 435 u32 fifo_credit_map; 436 u32 fifo_delay_map; 437 unsigned long borrow_defer_timestamp; 438 bool bus_flow_blocked; 439}; 440 441/* 442 * brcmf_fws_prio2fifo - mapping from 802.1d priority to firmware fifo index. 443 */ 444static const int brcmf_fws_prio2fifo[] = { 445 BRCMF_FWS_FIFO_AC_BE, 446 BRCMF_FWS_FIFO_AC_BK, 447 BRCMF_FWS_FIFO_AC_BK, 448 BRCMF_FWS_FIFO_AC_BE, 449 BRCMF_FWS_FIFO_AC_VI, 450 BRCMF_FWS_FIFO_AC_VI, 451 BRCMF_FWS_FIFO_AC_VO, 452 BRCMF_FWS_FIFO_AC_VO 453}; 454 455static int fcmode; 456module_param(fcmode, int, S_IRUSR); 457MODULE_PARM_DESC(fcmode, "mode of firmware signalled flow control"); 458 459#define BRCMF_FWS_TLV_DEF(name, id, len) \ 460 case BRCMF_FWS_TYPE_ ## name: \ 461 return len; 462 463/** 464 * brcmf_fws_get_tlv_len() - returns defined length for given tlv id. 465 * 466 * @fws: firmware-signalling information. 467 * @id: identifier of the TLV. 468 * 469 * Return: the specified length for the given TLV; Otherwise -EINVAL. 470 */ 471static int brcmf_fws_get_tlv_len(struct brcmf_fws_info *fws, 472 enum brcmf_fws_tlv_type id) 473{ 474 switch (id) { 475 BRCMF_FWS_TLV_DEFLIST 476 default: 477 fws->stats.tlv_invalid_type++; 478 break; 479 } 480 return -EINVAL; 481} 482#undef BRCMF_FWS_TLV_DEF 483 484static bool brcmf_fws_ifidx_match(struct sk_buff *skb, void *arg) 485{ 486 u32 ifidx = brcmf_skb_if_flags_get_field(skb, INDEX); 487 return ifidx == *(int *)arg; 488} 489 490static void brcmf_fws_psq_flush(struct brcmf_fws_info *fws, struct pktq *q, 491 int ifidx) 492{ 493 bool (*matchfn)(struct sk_buff *, void *) = NULL; 494 struct sk_buff *skb; 495 int prec; 496 497 if (ifidx != -1) 498 matchfn = brcmf_fws_ifidx_match; 499 for (prec = 0; prec < q->num_prec; prec++) { 500 skb = brcmu_pktq_pdeq_match(q, prec, matchfn, &ifidx); 501 while (skb) { 502 brcmu_pkt_buf_free_skb(skb); 503 skb = brcmu_pktq_pdeq_match(q, prec, matchfn, &ifidx); 504 } 505 } 506} 507 508static void brcmf_fws_hanger_init(struct brcmf_fws_hanger *hanger) 509{ 510 int i; 511 512 memset(hanger, 0, sizeof(*hanger)); 513 for (i = 0; i < ARRAY_SIZE(hanger->items); i++) 514 hanger->items[i].state = BRCMF_FWS_HANGER_ITEM_STATE_FREE; 515} 516 517static u32 brcmf_fws_hanger_get_free_slot(struct brcmf_fws_hanger *h) 518{ 519 u32 i; 520 521 i = (h->slot_pos + 1) % BRCMF_FWS_HANGER_MAXITEMS; 522 523 while (i != h->slot_pos) { 524 if (h->items[i].state == BRCMF_FWS_HANGER_ITEM_STATE_FREE) { 525 h->slot_pos = i; 526 goto done; 527 } 528 i++; 529 if (i == BRCMF_FWS_HANGER_MAXITEMS) 530 i = 0; 531 } 532 brcmf_err("all slots occupied\n"); 533 h->failed_slotfind++; 534 i = BRCMF_FWS_HANGER_MAXITEMS; 535done: 536 return i; 537} 538 539static int brcmf_fws_hanger_pushpkt(struct brcmf_fws_hanger *h, 540 struct sk_buff *pkt, u32 slot_id) 541{ 542 if (slot_id >= BRCMF_FWS_HANGER_MAXITEMS) 543 return -ENOENT; 544 545 if (h->items[slot_id].state != BRCMF_FWS_HANGER_ITEM_STATE_FREE) { 546 brcmf_err("slot is not free\n"); 547 h->failed_to_push++; 548 return -EINVAL; 549 } 550 551 h->items[slot_id].state = BRCMF_FWS_HANGER_ITEM_STATE_INUSE; 552 h->items[slot_id].pkt = pkt; 553 h->pushed++; 554 return 0; 555} 556 557static int brcmf_fws_hanger_poppkt(struct brcmf_fws_hanger *h, 558 u32 slot_id, struct sk_buff **pktout, 559 bool remove_item) 560{ 561 if (slot_id >= BRCMF_FWS_HANGER_MAXITEMS) 562 return -ENOENT; 563 564 if (h->items[slot_id].state == BRCMF_FWS_HANGER_ITEM_STATE_FREE) { 565 brcmf_err("entry not in use\n"); 566 h->failed_to_pop++; 567 return -EINVAL; 568 } 569 570 *pktout = h->items[slot_id].pkt; 571 if (remove_item) { 572 h->items[slot_id].state = BRCMF_FWS_HANGER_ITEM_STATE_FREE; 573 h->items[slot_id].pkt = NULL; 574 h->items[slot_id].gen = 0xff; 575 h->popped++; 576 } 577 return 0; 578} 579 580static int brcmf_fws_hanger_mark_suppressed(struct brcmf_fws_hanger *h, 581 u32 slot_id, u8 gen) 582{ 583 if (slot_id >= BRCMF_FWS_HANGER_MAXITEMS) 584 return -ENOENT; 585 586 h->items[slot_id].gen = gen; 587 588 if (h->items[slot_id].state != BRCMF_FWS_HANGER_ITEM_STATE_INUSE) { 589 brcmf_err("entry not in use\n"); 590 return -EINVAL; 591 } 592 593 h->items[slot_id].state = BRCMF_FWS_HANGER_ITEM_STATE_INUSE_SUPPRESSED; 594 return 0; 595} 596 597static int brcmf_fws_hanger_get_genbit(struct brcmf_fws_hanger *hanger, 598 struct sk_buff *pkt, u32 slot_id, 599 int *gen) 600{ 601 *gen = 0xff; 602 603 if (slot_id >= BRCMF_FWS_HANGER_MAXITEMS) 604 return -ENOENT; 605 606 if (hanger->items[slot_id].state == BRCMF_FWS_HANGER_ITEM_STATE_FREE) { 607 brcmf_err("slot not in use\n"); 608 return -EINVAL; 609 } 610 611 *gen = hanger->items[slot_id].gen; 612 return 0; 613} 614 615static void brcmf_fws_hanger_cleanup(struct brcmf_fws_info *fws, 616 bool (*fn)(struct sk_buff *, void *), 617 int ifidx) 618{ 619 struct brcmf_fws_hanger *h = &fws->hanger; 620 struct sk_buff *skb; 621 int i; 622 enum brcmf_fws_hanger_item_state s; 623 624 for (i = 0; i < ARRAY_SIZE(h->items); i++) { 625 s = h->items[i].state; 626 if (s == BRCMF_FWS_HANGER_ITEM_STATE_INUSE || 627 s == BRCMF_FWS_HANGER_ITEM_STATE_INUSE_SUPPRESSED) { 628 skb = h->items[i].pkt; 629 if (fn == NULL || fn(skb, &ifidx)) { 630 /* suppress packets freed from psq */ 631 if (s == BRCMF_FWS_HANGER_ITEM_STATE_INUSE) 632 brcmu_pkt_buf_free_skb(skb); 633 h->items[i].state = 634 BRCMF_FWS_HANGER_ITEM_STATE_FREE; 635 } 636 } 637 } 638} 639 640static void brcmf_fws_macdesc_set_name(struct brcmf_fws_info *fws, 641 struct brcmf_fws_mac_descriptor *desc) 642{ 643 if (desc == &fws->desc.other) 644 strlcpy(desc->name, "MAC-OTHER", sizeof(desc->name)); 645 else if (desc->mac_handle) 646 scnprintf(desc->name, sizeof(desc->name), "MAC-%d:%d", 647 desc->mac_handle, desc->interface_id); 648 else 649 scnprintf(desc->name, sizeof(desc->name), "MACIF:%d", 650 desc->interface_id); 651} 652 653static void brcmf_fws_init_mac_descriptor(struct brcmf_fws_mac_descriptor *desc, 654 u8 *addr, u8 ifidx) 655{ 656 brcmf_dbg(TRACE, 657 "enter: desc %p ea=%pM, ifidx=%u\n", desc, addr, ifidx); 658 desc->occupied = 1; 659 desc->state = BRCMF_FWS_STATE_OPEN; 660 desc->requested_credit = 0; 661 /* depending on use may need ifp->bssidx instead */ 662 desc->interface_id = ifidx; 663 desc->ac_bitmap = 0xff; /* update this when handling APSD */ 664 if (addr) 665 memcpy(&desc->ea[0], addr, ETH_ALEN); 666} 667 668static 669void brcmf_fws_clear_mac_descriptor(struct brcmf_fws_mac_descriptor *desc) 670{ 671 brcmf_dbg(TRACE, 672 "enter: ea=%pM, ifidx=%u\n", desc->ea, desc->interface_id); 673 desc->occupied = 0; 674 desc->state = BRCMF_FWS_STATE_CLOSE; 675 desc->requested_credit = 0; 676} 677 678static struct brcmf_fws_mac_descriptor * 679brcmf_fws_mac_descriptor_lookup(struct brcmf_fws_info *fws, u8 *ea) 680{ 681 struct brcmf_fws_mac_descriptor *entry; 682 int i; 683 684 if (ea == NULL) 685 return ERR_PTR(-EINVAL); 686 687 entry = &fws->desc.nodes[0]; 688 for (i = 0; i < ARRAY_SIZE(fws->desc.nodes); i++) { 689 if (entry->occupied && !memcmp(entry->ea, ea, ETH_ALEN)) 690 return entry; 691 entry++; 692 } 693 694 return ERR_PTR(-ENOENT); 695} 696 697static struct brcmf_fws_mac_descriptor* 698brcmf_fws_find_mac_desc(struct brcmf_fws_info *fws, struct brcmf_if *ifp, 699 u8 *da) 700{ 701 struct brcmf_fws_mac_descriptor *entry = &fws->desc.other; 702 bool multicast; 703 enum nl80211_iftype iftype; 704 705 multicast = is_multicast_ether_addr(da); 706 iftype = brcmf_cfg80211_get_iftype(ifp); 707 708 /* Multicast destination and P2P clients get the interface entry. 709 * STA gets the interface entry if there is no exact match. For 710 * example, TDLS destinations have their own entry. 711 */ 712 entry = NULL; 713 if ((multicast || iftype == NL80211_IFTYPE_STATION || 714 iftype == NL80211_IFTYPE_P2P_CLIENT) && ifp->fws_desc) 715 entry = ifp->fws_desc; 716 717 if (entry != NULL && iftype != NL80211_IFTYPE_STATION) 718 goto done; 719 720 entry = brcmf_fws_mac_descriptor_lookup(fws, da); 721 if (IS_ERR(entry)) 722 entry = &fws->desc.other; 723 724done: 725 return entry; 726} 727 728static bool brcmf_fws_mac_desc_closed(struct brcmf_fws_info *fws, 729 struct brcmf_fws_mac_descriptor *entry, 730 int fifo) 731{ 732 struct brcmf_fws_mac_descriptor *if_entry; 733 bool closed; 734 735 /* for unique destination entries the related interface 736 * may be closed. 737 */ 738 if (entry->mac_handle) { 739 if_entry = &fws->desc.iface[entry->interface_id]; 740 if (if_entry->state == BRCMF_FWS_STATE_CLOSE) 741 return true; 742 } 743 /* an entry is closed when the state is closed and 744 * the firmware did not request anything. 745 */ 746 closed = entry->state == BRCMF_FWS_STATE_CLOSE && 747 !entry->requested_credit && !entry->requested_packet; 748 749 /* Or firmware does not allow traffic for given fifo */ 750 return closed || !(entry->ac_bitmap & BIT(fifo)); 751} 752 753static void brcmf_fws_mac_desc_cleanup(struct brcmf_fws_info *fws, 754 struct brcmf_fws_mac_descriptor *entry, 755 int ifidx) 756{ 757 if (entry->occupied && (ifidx == -1 || ifidx == entry->interface_id)) { 758 brcmf_fws_psq_flush(fws, &entry->psq, ifidx); 759 entry->occupied = !!(entry->psq.len); 760 } 761} 762 763static void brcmf_fws_bus_txq_cleanup(struct brcmf_fws_info *fws, 764 bool (*fn)(struct sk_buff *, void *), 765 int ifidx) 766{ 767 struct brcmf_fws_hanger_item *hi; 768 struct pktq *txq; 769 struct sk_buff *skb; 770 int prec; 771 u32 hslot; 772 773 txq = brcmf_bus_gettxq(fws->drvr->bus_if); 774 if (IS_ERR(txq)) { 775 brcmf_dbg(TRACE, "no txq to clean up\n"); 776 return; 777 } 778 779 for (prec = 0; prec < txq->num_prec; prec++) { 780 skb = brcmu_pktq_pdeq_match(txq, prec, fn, &ifidx); 781 while (skb) { 782 hslot = brcmf_skb_htod_tag_get_field(skb, HSLOT); 783 hi = &fws->hanger.items[hslot]; 784 WARN_ON(skb != hi->pkt); 785 hi->state = BRCMF_FWS_HANGER_ITEM_STATE_FREE; 786 brcmu_pkt_buf_free_skb(skb); 787 skb = brcmu_pktq_pdeq_match(txq, prec, fn, &ifidx); 788 } 789 } 790} 791 792static void brcmf_fws_cleanup(struct brcmf_fws_info *fws, int ifidx) 793{ 794 int i; 795 struct brcmf_fws_mac_descriptor *table; 796 bool (*matchfn)(struct sk_buff *, void *) = NULL; 797 798 if (fws == NULL) 799 return; 800 801 if (ifidx != -1) 802 matchfn = brcmf_fws_ifidx_match; 803 804 /* cleanup individual nodes */ 805 table = &fws->desc.nodes[0]; 806 for (i = 0; i < ARRAY_SIZE(fws->desc.nodes); i++) 807 brcmf_fws_mac_desc_cleanup(fws, &table[i], ifidx); 808 809 brcmf_fws_mac_desc_cleanup(fws, &fws->desc.other, ifidx); 810 brcmf_fws_bus_txq_cleanup(fws, matchfn, ifidx); 811 brcmf_fws_hanger_cleanup(fws, matchfn, ifidx); 812} 813 814static void brcmf_fws_tim_update(struct brcmf_fws_info *ctx, 815 struct brcmf_fws_mac_descriptor *entry, 816 int prec) 817{ 818 if (entry->state == BRCMF_FWS_STATE_CLOSE) { 819 /* check delayedQ and suppressQ in one call using bitmap */ 820 if (brcmu_pktq_mlen(&entry->psq, 3 << (prec * 2)) == 0) 821 entry->traffic_pending_bmp = 822 entry->traffic_pending_bmp & ~NBITVAL(prec); 823 else 824 entry->traffic_pending_bmp = 825 entry->traffic_pending_bmp | NBITVAL(prec); 826 } 827 /* request a TIM update to firmware at the next piggyback opportunity */ 828 if (entry->traffic_lastreported_bmp != entry->traffic_pending_bmp) 829 entry->send_tim_signal = true; 830} 831 832static void 833brcmf_fws_flow_control_check(struct brcmf_fws_info *fws, struct pktq *pq, 834 u8 if_id) 835{ 836 struct brcmf_if *ifp = fws->drvr->iflist[if_id]; 837 838 if (WARN_ON(!ifp)) 839 return; 840 841 brcmf_dbg(TRACE, 842 "enter: bssidx=%d, ifidx=%d\n", ifp->bssidx, ifp->ifidx); 843 844 if ((ifp->netif_stop & BRCMF_NETIF_STOP_REASON_FWS_FC) && 845 pq->len <= BRCMF_FWS_FLOWCONTROL_LOWATER) 846 brcmf_txflowblock_if(ifp, 847 BRCMF_NETIF_STOP_REASON_FWS_FC, false); 848 if (!(ifp->netif_stop & BRCMF_NETIF_STOP_REASON_FWS_FC) && 849 pq->len >= BRCMF_FWS_FLOWCONTROL_HIWATER) 850 brcmf_txflowblock_if(ifp, BRCMF_NETIF_STOP_REASON_FWS_FC, true); 851 return; 852} 853 854static int brcmf_fws_rssi_indicate(struct brcmf_fws_info *fws, s8 rssi) 855{ 856 brcmf_dbg(CTL, "rssi %d\n", rssi); 857 return 0; 858} 859 860static 861int brcmf_fws_macdesc_indicate(struct brcmf_fws_info *fws, u8 type, u8 *data) 862{ 863 struct brcmf_fws_mac_descriptor *entry, *existing; 864 u8 mac_handle; 865 u8 ifidx; 866 u8 *addr; 867 868 mac_handle = *data++; 869 ifidx = *data++; 870 addr = data; 871 872 entry = &fws->desc.nodes[mac_handle & 0x1F]; 873 if (type == BRCMF_FWS_TYPE_MACDESC_DEL) { 874 if (entry->occupied) { 875 brcmf_dbg(TRACE, "deleting %s mac %pM\n", 876 entry->name, addr); 877 brcmf_fws_mac_desc_cleanup(fws, entry, -1); 878 brcmf_fws_clear_mac_descriptor(entry); 879 } else 880 fws->stats.mac_update_failed++; 881 return 0; 882 } 883 884 existing = brcmf_fws_mac_descriptor_lookup(fws, addr); 885 if (IS_ERR(existing)) { 886 if (!entry->occupied) { 887 entry->mac_handle = mac_handle; 888 brcmf_fws_init_mac_descriptor(entry, addr, ifidx); 889 brcmf_fws_macdesc_set_name(fws, entry); 890 brcmu_pktq_init(&entry->psq, BRCMF_FWS_PSQ_PREC_COUNT, 891 BRCMF_FWS_PSQ_LEN); 892 brcmf_dbg(TRACE, "add %s mac %pM\n", entry->name, addr); 893 } else { 894 fws->stats.mac_update_failed++; 895 } 896 } else { 897 if (entry != existing) { 898 brcmf_dbg(TRACE, "copy mac %s\n", existing->name); 899 memcpy(entry, existing, 900 offsetof(struct brcmf_fws_mac_descriptor, psq)); 901 entry->mac_handle = mac_handle; 902 brcmf_fws_clear_mac_descriptor(existing); 903 brcmf_fws_macdesc_set_name(fws, entry); 904 brcmf_dbg(TRACE, "relocate %s mac %pM\n", entry->name, 905 addr); 906 } else { 907 brcmf_dbg(TRACE, "use existing\n"); 908 WARN_ON(entry->mac_handle != mac_handle); 909 /* TODO: what should we do here: continue, reinit, .. */ 910 } 911 } 912 return 0; 913} 914 915static int brcmf_fws_macdesc_state_indicate(struct brcmf_fws_info *fws, 916 u8 type, u8 *data) 917{ 918 struct brcmf_fws_mac_descriptor *entry; 919 u8 mac_handle; 920 int i; 921 922 mac_handle = data[0]; 923 entry = &fws->desc.nodes[mac_handle & 0x1F]; 924 if (!entry->occupied) { 925 fws->stats.mac_ps_update_failed++; 926 return -ESRCH; 927 } 928 929 brcmf_dbg(TRACE, "%s (%d): %s\n", brcmf_fws_get_tlv_name(type), type, 930 entry->name); 931 /* a state update should wipe old credits? */ 932 entry->requested_credit = 0; 933 if (type == BRCMF_FWS_TYPE_MAC_OPEN) { 934 entry->state = BRCMF_FWS_STATE_OPEN; 935 return BRCMF_FWS_RET_OK_SCHEDULE; 936 } else { 937 entry->state = BRCMF_FWS_STATE_CLOSE; 938 for (i = BRCMF_FWS_FIFO_AC_BE; i < NL80211_NUM_ACS; i++) 939 brcmf_fws_tim_update(fws, entry, i); 940 } 941 return BRCMF_FWS_RET_OK_NOSCHEDULE; 942} 943 944static int brcmf_fws_interface_state_indicate(struct brcmf_fws_info *fws, 945 u8 type, u8 *data) 946{ 947 struct brcmf_fws_mac_descriptor *entry; 948 u8 ifidx; 949 int ret; 950 951 ifidx = data[0]; 952 953 if (ifidx >= BRCMF_MAX_IFS) { 954 ret = -ERANGE; 955 goto fail; 956 } 957 958 entry = &fws->desc.iface[ifidx]; 959 if (!entry->occupied) { 960 ret = -ESRCH; 961 goto fail; 962 } 963 964 brcmf_dbg(TRACE, "%s (%d): %s\n", brcmf_fws_get_tlv_name(type), type, 965 entry->name); 966 switch (type) { 967 case BRCMF_FWS_TYPE_INTERFACE_OPEN: 968 entry->state = BRCMF_FWS_STATE_OPEN; 969 return BRCMF_FWS_RET_OK_SCHEDULE; 970 case BRCMF_FWS_TYPE_INTERFACE_CLOSE: 971 entry->state = BRCMF_FWS_STATE_CLOSE; 972 return BRCMF_FWS_RET_OK_NOSCHEDULE; 973 default: 974 ret = -EINVAL; 975 break; 976 } 977fail: 978 fws->stats.if_update_failed++; 979 return ret; 980} 981 982static int brcmf_fws_request_indicate(struct brcmf_fws_info *fws, u8 type, 983 u8 *data) 984{ 985 struct brcmf_fws_mac_descriptor *entry; 986 987 entry = &fws->desc.nodes[data[1] & 0x1F]; 988 if (!entry->occupied) { 989 if (type == BRCMF_FWS_TYPE_MAC_REQUEST_CREDIT) 990 fws->stats.credit_request_failed++; 991 else 992 fws->stats.packet_request_failed++; 993 return -ESRCH; 994 } 995 996 brcmf_dbg(TRACE, "%s (%d): %s cnt %d bmp %d\n", 997 brcmf_fws_get_tlv_name(type), type, entry->name, 998 data[0], data[2]); 999 if (type == BRCMF_FWS_TYPE_MAC_REQUEST_CREDIT) 1000 entry->requested_credit = data[0]; 1001 else 1002 entry->requested_packet = data[0]; 1003 1004 entry->ac_bitmap = data[2]; 1005 return BRCMF_FWS_RET_OK_SCHEDULE; 1006} 1007 1008static int brcmf_fws_macdesc_use_credit(struct brcmf_fws_mac_descriptor *entry, 1009 struct sk_buff *skb) 1010{ 1011 int use_credit = 1; 1012 1013 if (entry->state == BRCMF_FWS_STATE_CLOSE) { 1014 if (entry->requested_credit > 0) { 1015 /* 1016 * if the packet was pulled out while destination is in 1017 * closed state but had a non-zero packets requested, 1018 * then this should not count against the FIFO credit. 1019 * That is due to the fact that the firmware will 1020 * most likely hold onto this packet until a suitable 1021 * time later to push it to the appropriate AC FIFO. 1022 */ 1023 entry->requested_credit--; 1024 brcmf_skb_if_flags_set_field(skb, REQ_CREDIT, 1); 1025 use_credit = 0; 1026 } else if (entry->requested_packet > 0) { 1027 entry->requested_packet--; 1028 brcmf_skb_if_flags_set_field(skb, REQUESTED, 1); 1029 use_credit = 0; 1030 } 1031 } else { 1032 WARN_ON(entry->requested_credit); 1033 WARN_ON(entry->requested_packet); 1034 } 1035 brcmf_skb_if_flags_set_field(skb, CREDITCHECK, use_credit); 1036 return use_credit; 1037} 1038 1039static void brcmf_fws_return_credits(struct brcmf_fws_info *fws, 1040 u8 fifo, u8 credits) 1041{ 1042 int lender_ac; 1043 int *borrowed; 1044 int *fifo_credit; 1045 1046 if (!credits) 1047 return; 1048 1049 if ((fifo == BRCMF_FWS_FIFO_AC_BE) && 1050 (fws->credits_borrowed[0])) { 1051 for (lender_ac = BRCMF_FWS_FIFO_AC_VO; lender_ac >= 0; 1052 lender_ac--) { 1053 borrowed = &fws->credits_borrowed[lender_ac]; 1054 if (*borrowed) { 1055 fws->fifo_credit_map |= (1 << lender_ac); 1056 fifo_credit = &fws->fifo_credit[lender_ac]; 1057 if (*borrowed >= credits) { 1058 *borrowed -= credits; 1059 *fifo_credit += credits; 1060 return; 1061 } else { 1062 credits -= *borrowed; 1063 *fifo_credit += *borrowed; 1064 *borrowed = 0; 1065 } 1066 } 1067 } 1068 } 1069 1070 fws->fifo_credit_map |= 1 << fifo; 1071 fws->fifo_credit[fifo] += credits; 1072} 1073 1074static void brcmf_fws_schedule_deq(struct brcmf_fws_info *fws) 1075{ 1076 /* only schedule dequeue when there are credits for delayed traffic */ 1077 if (fws->fifo_credit_map & fws->fifo_delay_map) 1078 queue_work(fws->fws_wq, &fws->fws_dequeue_work); 1079} 1080 1081static void brcmf_fws_skb_pickup_credit(struct brcmf_fws_info *fws, int fifo, 1082 struct sk_buff *p) 1083{ 1084 struct brcmf_fws_mac_descriptor *entry = brcmf_skbcb(p)->mac; 1085 1086 if (brcmf_skbcb(p)->if_flags & BRCMF_SKB_IF_FLAGS_CREDITCHECK_MASK) 1087 brcmf_fws_return_credits(fws, fifo, 1); 1088 else if (brcmf_skb_if_flags_get_field(p, REQ_CREDIT) && 1089 entry->state == BRCMF_FWS_STATE_CLOSE) 1090 /* 1091 * if this packet did not count against FIFO credit, it 1092 * could have taken a requested_credit from the destination 1093 * entry (for pspoll etc.) 1094 */ 1095 entry->requested_credit++; 1096 1097 brcmf_fws_schedule_deq(fws); 1098} 1099 1100static int brcmf_fws_enq(struct brcmf_fws_info *fws, 1101 enum brcmf_fws_skb_state state, int fifo, 1102 struct sk_buff *p) 1103{ 1104 int prec = 2 * fifo; 1105 u32 *qfull_stat = &fws->stats.delayq_full_error; 1106 1107 struct brcmf_fws_mac_descriptor *entry; 1108 1109 entry = brcmf_skbcb(p)->mac; 1110 if (entry == NULL) { 1111 brcmf_err("no mac descriptor found for skb %p\n", p); 1112 return -ENOENT; 1113 } 1114 1115 brcmf_dbg(DATA, "enter: fifo %d skb %p\n", fifo, p); 1116 if (state == BRCMF_FWS_SKBSTATE_SUPPRESSED) { 1117 prec += 1; 1118 qfull_stat = &fws->stats.supprq_full_error; 1119 } 1120 1121 if (brcmu_pktq_penq(&entry->psq, prec, p) == NULL) { 1122 *qfull_stat += 1; 1123 return -ENFILE; 1124 } 1125 1126 /* increment total enqueued packet count */ 1127 fws->fifo_delay_map |= 1 << fifo; 1128 fws->fifo_enqpkt[fifo]++; 1129 1130 /* update the sk_buff state */ 1131 brcmf_skbcb(p)->state = state; 1132 if (state == BRCMF_FWS_SKBSTATE_SUPPRESSED) 1133 entry->suppress_count++; 1134 1135 /* 1136 * A packet has been pushed so update traffic 1137 * availability bitmap, if applicable 1138 */ 1139 brcmf_fws_tim_update(fws, entry, fifo); 1140 brcmf_fws_flow_control_check(fws, &entry->psq, 1141 brcmf_skb_if_flags_get_field(p, INDEX)); 1142 return 0; 1143} 1144 1145static struct sk_buff *brcmf_fws_deq(struct brcmf_fws_info *fws, int fifo) 1146{ 1147 struct brcmf_fws_mac_descriptor *table; 1148 struct brcmf_fws_mac_descriptor *entry; 1149 struct sk_buff *p; 1150 int num_nodes; 1151 int node_pos; 1152 int prec_out; 1153 int pmsk; 1154 int i; 1155 1156 table = (struct brcmf_fws_mac_descriptor *)&fws->desc; 1157 num_nodes = sizeof(fws->desc) / sizeof(struct brcmf_fws_mac_descriptor); 1158 node_pos = fws->deq_node_pos[fifo]; 1159 1160 for (i = 0; i < num_nodes; i++) { 1161 entry = &table[(node_pos + i) % num_nodes]; 1162 if (!entry->occupied || 1163 brcmf_fws_mac_desc_closed(fws, entry, fifo)) 1164 continue; 1165 1166 if (entry->suppressed) 1167 pmsk = 2; 1168 else 1169 pmsk = 3; 1170 p = brcmu_pktq_mdeq(&entry->psq, pmsk << (fifo * 2), &prec_out); 1171 if (p == NULL) { 1172 if (entry->suppressed) { 1173 if (entry->suppr_transit_count > 1174 entry->suppress_count) 1175 return NULL; 1176 entry->suppressed = false; 1177 p = brcmu_pktq_mdeq(&entry->psq, 1178 1 << (fifo * 2), &prec_out); 1179 } 1180 } 1181 if (p == NULL) 1182 continue; 1183 1184 brcmf_fws_macdesc_use_credit(entry, p); 1185 1186 /* move dequeue position to ensure fair round-robin */ 1187 fws->deq_node_pos[fifo] = (node_pos + i + 1) % num_nodes; 1188 brcmf_fws_flow_control_check(fws, &entry->psq, 1189 brcmf_skb_if_flags_get_field(p, 1190 INDEX) 1191 ); 1192 /* 1193 * A packet has been picked up, update traffic 1194 * availability bitmap, if applicable 1195 */ 1196 brcmf_fws_tim_update(fws, entry, fifo); 1197 1198 /* 1199 * decrement total enqueued fifo packets and 1200 * clear delay bitmap if done. 1201 */ 1202 fws->fifo_enqpkt[fifo]--; 1203 if (fws->fifo_enqpkt[fifo] == 0) 1204 fws->fifo_delay_map &= ~(1 << fifo); 1205 goto done; 1206 } 1207 p = NULL; 1208done: 1209 brcmf_dbg(DATA, "exit: fifo %d skb %p\n", fifo, p); 1210 return p; 1211} 1212 1213static int brcmf_fws_txstatus_suppressed(struct brcmf_fws_info *fws, int fifo, 1214 struct sk_buff *skb, u32 genbit) 1215{ 1216 struct brcmf_fws_mac_descriptor *entry = brcmf_skbcb(skb)->mac; 1217 u32 hslot; 1218 int ret; 1219 1220 hslot = brcmf_skb_htod_tag_get_field(skb, HSLOT); 1221 1222 /* this packet was suppressed */ 1223 if (!entry->suppressed || entry->generation != genbit) { 1224 entry->suppressed = true; 1225 entry->suppress_count = brcmu_pktq_mlen(&entry->psq, 1226 1 << (fifo * 2 + 1)); 1227 entry->suppr_transit_count = entry->transit_count; 1228 brcmf_dbg(DATA, "suppress %s: supp_cnt %d transit %d\n", 1229 entry->name, entry->suppress_count, 1230 entry->transit_count); 1231 } 1232 1233 entry->generation = genbit; 1234 1235 ret = brcmf_fws_enq(fws, BRCMF_FWS_SKBSTATE_SUPPRESSED, fifo, skb); 1236 if (ret != 0) { 1237 /* suppress q is full, drop this packet */ 1238 brcmf_fws_hanger_poppkt(&fws->hanger, hslot, &skb, 1239 true); 1240 } else { 1241 /* 1242 * Mark suppressed to avoid a double free during 1243 * wlfc cleanup 1244 */ 1245 brcmf_fws_hanger_mark_suppressed(&fws->hanger, hslot, 1246 genbit); 1247 entry->suppress_count++; 1248 } 1249 1250 return ret; 1251} 1252 1253static int 1254brcmf_fws_txs_process(struct brcmf_fws_info *fws, u8 flags, u32 hslot, 1255 u32 genbit) 1256{ 1257 u32 fifo; 1258 int ret; 1259 bool remove_from_hanger = true; 1260 struct sk_buff *skb; 1261 struct brcmf_skbuff_cb *skcb; 1262 struct brcmf_fws_mac_descriptor *entry = NULL; 1263 1264 brcmf_dbg(DATA, "flags %d\n", flags); 1265 1266 if (flags == BRCMF_FWS_TXSTATUS_DISCARD) 1267 fws->stats.txs_discard++; 1268 else if (flags == BRCMF_FWS_TXSTATUS_CORE_SUPPRESS) { 1269 fws->stats.txs_supp_core++; 1270 remove_from_hanger = false; 1271 } else if (flags == BRCMF_FWS_TXSTATUS_FW_PS_SUPPRESS) { 1272 fws->stats.txs_supp_ps++; 1273 remove_from_hanger = false; 1274 } else if (flags == BRCMF_FWS_TXSTATUS_FW_TOSSED) 1275 fws->stats.txs_tossed++; 1276 else 1277 brcmf_err("unexpected txstatus\n"); 1278 1279 ret = brcmf_fws_hanger_poppkt(&fws->hanger, hslot, &skb, 1280 remove_from_hanger); 1281 if (ret != 0) { 1282 brcmf_err("no packet in hanger slot: hslot=%d\n", hslot); 1283 return ret; 1284 } 1285 1286 skcb = brcmf_skbcb(skb); 1287 entry = skcb->mac; 1288 if (WARN_ON(!entry)) { 1289 brcmu_pkt_buf_free_skb(skb); 1290 return -EINVAL; 1291 } 1292 1293 brcmf_dbg(DATA, "%s flags %X htod %X\n", entry->name, skcb->if_flags, 1294 skcb->htod); 1295 1296 /* pick up the implicit credit from this packet */ 1297 fifo = brcmf_skb_htod_tag_get_field(skb, FIFO); 1298 if (fws->fcmode == BRCMF_FWS_FCMODE_IMPLIED_CREDIT || 1299 !(brcmf_skbcb(skb)->if_flags & BRCMF_SKB_IF_FLAGS_CREDITCHECK_MASK)) 1300 brcmf_fws_skb_pickup_credit(fws, fifo, skb); 1301 1302 if (!remove_from_hanger) 1303 ret = brcmf_fws_txstatus_suppressed(fws, fifo, skb, genbit); 1304 1305 if (remove_from_hanger || ret) { 1306 entry->transit_count--; 1307 if (entry->suppressed) 1308 entry->suppr_transit_count--; 1309 1310 brcmf_txfinalize(fws->drvr, skb, true); 1311 } 1312 return 0; 1313} 1314 1315static int brcmf_fws_fifocreditback_indicate(struct brcmf_fws_info *fws, 1316 u8 *data) 1317{ 1318 int i; 1319 1320 if (fws->fcmode != BRCMF_FWS_FCMODE_EXPLICIT_CREDIT) { 1321 brcmf_dbg(INFO, "ignored\n"); 1322 return BRCMF_FWS_RET_OK_NOSCHEDULE; 1323 } 1324 1325 brcmf_dbg(DATA, "enter: data %pM\n", data); 1326 for (i = 0; i < BRCMF_FWS_FIFO_COUNT; i++) 1327 brcmf_fws_return_credits(fws, i, data[i]); 1328 1329 brcmf_dbg(DATA, "map: credit %x delay %x\n", fws->fifo_credit_map, 1330 fws->fifo_delay_map); 1331 return BRCMF_FWS_RET_OK_SCHEDULE; 1332} 1333 1334static int brcmf_fws_txstatus_indicate(struct brcmf_fws_info *fws, u8 *data) 1335{ 1336 __le32 status_le; 1337 u32 status; 1338 u32 hslot; 1339 u32 genbit; 1340 u8 flags; 1341 1342 fws->stats.txs_indicate++; 1343 memcpy(&status_le, data, sizeof(status_le)); 1344 status = le32_to_cpu(status_le); 1345 flags = brcmf_txstatus_get_field(status, FLAGS); 1346 hslot = brcmf_txstatus_get_field(status, HSLOT); 1347 genbit = brcmf_txstatus_get_field(status, GENERATION); 1348 1349 return brcmf_fws_txs_process(fws, flags, hslot, genbit); 1350} 1351 1352static int brcmf_fws_dbg_seqnum_check(struct brcmf_fws_info *fws, u8 *data) 1353{ 1354 __le32 timestamp; 1355 1356 memcpy(×tamp, &data[2], sizeof(timestamp)); 1357 brcmf_dbg(CTL, "received: seq %d, timestamp %d\n", data[1], 1358 le32_to_cpu(timestamp)); 1359 return 0; 1360} 1361 1362/* using macro so sparse checking does not complain 1363 * about locking imbalance. 1364 */ 1365#define brcmf_fws_lock(drvr, flags) \ 1366do { \ 1367 flags = 0; \ 1368 spin_lock_irqsave(&((drvr)->fws_spinlock), (flags)); \ 1369} while (0) 1370 1371/* using macro so sparse checking does not complain 1372 * about locking imbalance. 1373 */ 1374#define brcmf_fws_unlock(drvr, flags) \ 1375 spin_unlock_irqrestore(&((drvr)->fws_spinlock), (flags)) 1376 1377static int brcmf_fws_notify_credit_map(struct brcmf_if *ifp, 1378 const struct brcmf_event_msg *e, 1379 void *data) 1380{ 1381 struct brcmf_fws_info *fws = ifp->drvr->fws; 1382 int i; 1383 ulong flags; 1384 u8 *credits = data; 1385 1386 if (e->datalen < BRCMF_FWS_FIFO_COUNT) { 1387 brcmf_err("event payload too small (%d)\n", e->datalen); 1388 return -EINVAL; 1389 } 1390 1391 brcmf_dbg(TRACE, "enter: credits %pM\n", credits); 1392 brcmf_fws_lock(ifp->drvr, flags); 1393 for (i = 0; i < ARRAY_SIZE(fws->fifo_credit); i++) { 1394 if (*credits) 1395 fws->fifo_credit_map |= 1 << i; 1396 else 1397 fws->fifo_credit_map &= ~(1 << i); 1398 fws->fifo_credit[i] = *credits++; 1399 } 1400 brcmf_fws_schedule_deq(fws); 1401 brcmf_fws_unlock(ifp->drvr, flags); 1402 return 0; 1403} 1404 1405int brcmf_fws_hdrpull(struct brcmf_pub *drvr, int ifidx, s16 signal_len, 1406 struct sk_buff *skb) 1407{ 1408 struct brcmf_fws_info *fws = drvr->fws; 1409 ulong flags; 1410 u8 *signal_data; 1411 s16 data_len; 1412 u8 type; 1413 u8 len; 1414 u8 *data; 1415 s32 status; 1416 s32 err; 1417 1418 brcmf_dbg(HDRS, "enter: ifidx %d, skblen %u, sig %d\n", 1419 ifidx, skb->len, signal_len); 1420 1421 WARN_ON(signal_len > skb->len); 1422 1423 /* if flow control disabled, skip to packet data and leave */ 1424 if (!signal_len || !drvr->fw_signals) { 1425 skb_pull(skb, signal_len); 1426 return 0; 1427 } 1428 1429 /* lock during tlv parsing */ 1430 brcmf_fws_lock(drvr, flags); 1431 1432 fws->stats.header_pulls++; 1433 data_len = signal_len; 1434 signal_data = skb->data; 1435 1436 status = BRCMF_FWS_RET_OK_NOSCHEDULE; 1437 while (data_len > 0) { 1438 /* extract tlv info */ 1439 type = signal_data[0]; 1440 1441 /* FILLER type is actually not a TLV, but 1442 * a single byte that can be skipped. 1443 */ 1444 if (type == BRCMF_FWS_TYPE_FILLER) { 1445 signal_data += 1; 1446 data_len -= 1; 1447 continue; 1448 } 1449 len = signal_data[1]; 1450 data = signal_data + 2; 1451 1452 brcmf_dbg(HDRS, "tlv type=%s (%d), len=%d (%d)\n", 1453 brcmf_fws_get_tlv_name(type), type, len, 1454 brcmf_fws_get_tlv_len(fws, type)); 1455 1456 /* abort parsing when length invalid */ 1457 if (data_len < len + 2) 1458 break; 1459 1460 if (len < brcmf_fws_get_tlv_len(fws, type)) 1461 break; 1462 1463 err = BRCMF_FWS_RET_OK_NOSCHEDULE; 1464 switch (type) { 1465 case BRCMF_FWS_TYPE_HOST_REORDER_RXPKTS: 1466 case BRCMF_FWS_TYPE_COMP_TXSTATUS: 1467 break; 1468 case BRCMF_FWS_TYPE_MACDESC_ADD: 1469 case BRCMF_FWS_TYPE_MACDESC_DEL: 1470 brcmf_fws_macdesc_indicate(fws, type, data); 1471 break; 1472 case BRCMF_FWS_TYPE_MAC_OPEN: 1473 case BRCMF_FWS_TYPE_MAC_CLOSE: 1474 err = brcmf_fws_macdesc_state_indicate(fws, type, data); 1475 break; 1476 case BRCMF_FWS_TYPE_INTERFACE_OPEN: 1477 case BRCMF_FWS_TYPE_INTERFACE_CLOSE: 1478 err = brcmf_fws_interface_state_indicate(fws, type, 1479 data); 1480 break; 1481 case BRCMF_FWS_TYPE_MAC_REQUEST_CREDIT: 1482 case BRCMF_FWS_TYPE_MAC_REQUEST_PACKET: 1483 err = brcmf_fws_request_indicate(fws, type, data); 1484 break; 1485 case BRCMF_FWS_TYPE_TXSTATUS: 1486 brcmf_fws_txstatus_indicate(fws, data); 1487 break; 1488 case BRCMF_FWS_TYPE_FIFO_CREDITBACK: 1489 err = brcmf_fws_fifocreditback_indicate(fws, data); 1490 break; 1491 case BRCMF_FWS_TYPE_RSSI: 1492 brcmf_fws_rssi_indicate(fws, *data); 1493 break; 1494 case BRCMF_FWS_TYPE_TRANS_ID: 1495 brcmf_fws_dbg_seqnum_check(fws, data); 1496 break; 1497 case BRCMF_FWS_TYPE_PKTTAG: 1498 case BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP: 1499 default: 1500 fws->stats.tlv_invalid_type++; 1501 break; 1502 } 1503 if (err == BRCMF_FWS_RET_OK_SCHEDULE) 1504 status = BRCMF_FWS_RET_OK_SCHEDULE; 1505 signal_data += len + 2; 1506 data_len -= len + 2; 1507 } 1508 1509 if (data_len != 0) 1510 fws->stats.tlv_parse_failed++; 1511 1512 if (status == BRCMF_FWS_RET_OK_SCHEDULE) 1513 brcmf_fws_schedule_deq(fws); 1514 1515 /* signalling processing result does 1516 * not affect the actual ethernet packet. 1517 */ 1518 skb_pull(skb, signal_len); 1519 1520 /* this may be a signal-only packet 1521 */ 1522 if (skb->len == 0) 1523 fws->stats.header_only_pkt++; 1524 1525 brcmf_fws_unlock(drvr, flags); 1526 return 0; 1527} 1528 1529static int brcmf_fws_hdrpush(struct brcmf_fws_info *fws, struct sk_buff *skb) 1530{ 1531 struct brcmf_fws_mac_descriptor *entry = brcmf_skbcb(skb)->mac; 1532 u8 *wlh; 1533 u16 data_offset = 0; 1534 u8 fillers; 1535 __le32 pkttag = cpu_to_le32(brcmf_skbcb(skb)->htod); 1536 1537 if (entry->send_tim_signal) 1538 data_offset += 2 + BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP_LEN; 1539 1540 /* +2 is for Type[1] and Len[1] in TLV, plus TIM signal */ 1541 data_offset += 2 + BRCMF_FWS_TYPE_PKTTAG_LEN; 1542 fillers = round_up(data_offset, 4) - data_offset; 1543 data_offset += fillers; 1544 1545 skb_push(skb, data_offset); 1546 wlh = skb->data; 1547 1548 wlh[0] = BRCMF_FWS_TYPE_PKTTAG; 1549 wlh[1] = BRCMF_FWS_TYPE_PKTTAG_LEN; 1550 memcpy(&wlh[2], &pkttag, sizeof(pkttag)); 1551 wlh += BRCMF_FWS_TYPE_PKTTAG_LEN + 2; 1552 1553 if (entry->send_tim_signal) { 1554 entry->send_tim_signal = 0; 1555 wlh[0] = BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP; 1556 wlh[1] = BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP_LEN; 1557 wlh[2] = entry->mac_handle; 1558 wlh[3] = entry->traffic_pending_bmp; 1559 wlh += BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP_LEN + 2; 1560 entry->traffic_lastreported_bmp = entry->traffic_pending_bmp; 1561 } 1562 if (fillers) 1563 memset(wlh, BRCMF_FWS_TYPE_FILLER, fillers); 1564 1565 brcmf_proto_hdrpush(fws->drvr, brcmf_skb_if_flags_get_field(skb, INDEX), 1566 data_offset >> 2, skb); 1567 return 0; 1568} 1569 1570static int brcmf_fws_precommit_skb(struct brcmf_fws_info *fws, int fifo, 1571 struct sk_buff *p) 1572{ 1573 struct brcmf_skbuff_cb *skcb = brcmf_skbcb(p); 1574 struct brcmf_fws_mac_descriptor *entry = skcb->mac; 1575 int rc = 0; 1576 bool header_needed; 1577 int hslot = BRCMF_FWS_HANGER_MAXITEMS; 1578 u8 free_ctr; 1579 u8 ifidx; 1580 u8 flags; 1581 1582 header_needed = skcb->state != BRCMF_FWS_SKBSTATE_SUPPRESSED; 1583 1584 if (header_needed) { 1585 /* obtaining free slot may fail, but that will be caught 1586 * by the hanger push. This assures the packet has a BDC 1587 * header upon return. 1588 */ 1589 hslot = brcmf_fws_hanger_get_free_slot(&fws->hanger); 1590 free_ctr = entry->seq[fifo]; 1591 brcmf_skb_htod_tag_set_field(p, HSLOT, hslot); 1592 brcmf_skb_htod_tag_set_field(p, FREERUN, free_ctr); 1593 brcmf_skb_htod_tag_set_field(p, GENERATION, 1); 1594 entry->transit_count++; 1595 } 1596 brcmf_skb_if_flags_set_field(p, TRANSMIT, 1); 1597 brcmf_skb_htod_tag_set_field(p, FIFO, fifo); 1598 1599 flags = BRCMF_FWS_HTOD_FLAG_PKTFROMHOST; 1600 if (!(skcb->if_flags & BRCMF_SKB_IF_FLAGS_CREDITCHECK_MASK)) { 1601 /* 1602 Indicate that this packet is being sent in response to an 1603 explicit request from the firmware side. 1604 */ 1605 flags |= BRCMF_FWS_HTOD_FLAG_PKT_REQUESTED; 1606 } 1607 brcmf_skb_htod_tag_set_field(p, FLAGS, flags); 1608 if (header_needed) { 1609 brcmf_fws_hdrpush(fws, p); 1610 rc = brcmf_fws_hanger_pushpkt(&fws->hanger, p, hslot); 1611 if (rc) 1612 brcmf_err("hanger push failed: rc=%d\n", rc); 1613 } else { 1614 int gen; 1615 1616 /* remove old header */ 1617 rc = brcmf_proto_hdrpull(fws->drvr, false, &ifidx, p); 1618 if (rc == 0) { 1619 hslot = brcmf_skb_htod_tag_get_field(p, HSLOT); 1620 brcmf_fws_hanger_get_genbit(&fws->hanger, p, 1621 hslot, &gen); 1622 brcmf_skb_htod_tag_set_field(p, GENERATION, gen); 1623 1624 /* push new header */ 1625 brcmf_fws_hdrpush(fws, p); 1626 } 1627 } 1628 1629 return rc; 1630} 1631 1632static void 1633brcmf_fws_rollback_toq(struct brcmf_fws_info *fws, 1634 struct sk_buff *skb, int fifo) 1635{ 1636 /* 1637 put the packet back to the head of queue 1638 1639 - suppressed packet goes back to suppress sub-queue 1640 - pull out the header, if new or delayed packet 1641 1642 Note: hslot is used only when header removal is done. 1643 */ 1644 struct brcmf_fws_mac_descriptor *entry; 1645 enum brcmf_fws_skb_state state; 1646 struct sk_buff *pktout; 1647 int rc = 0; 1648 int hslot; 1649 u8 ifidx; 1650 1651 state = brcmf_skbcb(skb)->state; 1652 entry = brcmf_skbcb(skb)->mac; 1653 1654 if (entry != NULL) { 1655 if (state == BRCMF_FWS_SKBSTATE_SUPPRESSED) { 1656 /* wl-header is saved for suppressed packets */ 1657 pktout = brcmu_pktq_penq_head(&entry->psq, 2 * fifo + 1, 1658 skb); 1659 if (pktout == NULL) { 1660 brcmf_err("suppress queue full\n"); 1661 rc = -ENOSPC; 1662 } 1663 } else { 1664 hslot = brcmf_skb_htod_tag_get_field(skb, HSLOT); 1665 1666 /* remove header first */ 1667 rc = brcmf_proto_hdrpull(fws->drvr, false, &ifidx, skb); 1668 if (rc) { 1669 brcmf_err("header removal failed\n"); 1670 /* free the hanger slot */ 1671 brcmf_fws_hanger_poppkt(&fws->hanger, hslot, 1672 &pktout, true); 1673 rc = -EINVAL; 1674 goto fail; 1675 } 1676 1677 /* delay-q packets are going to delay-q */ 1678 pktout = brcmu_pktq_penq_head(&entry->psq, 1679 2 * fifo, skb); 1680 if (pktout == NULL) { 1681 brcmf_err("delay queue full\n"); 1682 rc = -ENOSPC; 1683 } 1684 1685 /* free the hanger slot */ 1686 brcmf_fws_hanger_poppkt(&fws->hanger, hslot, &pktout, 1687 true); 1688 1689 /* decrement sequence count */ 1690 entry->seq[fifo]--; 1691 } 1692 } else { 1693 brcmf_err("no mac entry linked\n"); 1694 rc = -ENOENT; 1695 } 1696 1697 1698fail: 1699 if (rc) { 1700 brcmf_fws_bustxfail(fws, skb); 1701 fws->stats.rollback_failed++; 1702 } else { 1703 fws->stats.rollback_success++; 1704 brcmf_fws_skb_pickup_credit(fws, fifo, skb); 1705 } 1706} 1707 1708static int brcmf_fws_borrow_credit(struct brcmf_fws_info *fws) 1709{ 1710 int lender_ac; 1711 1712 if (time_after(fws->borrow_defer_timestamp, jiffies)) 1713 return -ENAVAIL; 1714 1715 for (lender_ac = 0; lender_ac <= BRCMF_FWS_FIFO_AC_VO; lender_ac++) { 1716 if (fws->fifo_credit[lender_ac]) { 1717 fws->credits_borrowed[lender_ac]++; 1718 fws->fifo_credit[lender_ac]--; 1719 if (fws->fifo_credit[lender_ac] == 0) 1720 fws->fifo_credit_map &= ~(1 << lender_ac); 1721 brcmf_dbg(DATA, "borrow credit from: %d\n", lender_ac); 1722 return 0; 1723 } 1724 } 1725 return -ENAVAIL; 1726} 1727 1728static int brcmf_fws_consume_credit(struct brcmf_fws_info *fws, int fifo, 1729 struct sk_buff *skb) 1730{ 1731 struct brcmf_fws_mac_descriptor *entry = brcmf_skbcb(skb)->mac; 1732 int *credit = &fws->fifo_credit[fifo]; 1733 1734 if (!brcmf_fws_macdesc_use_credit(entry, skb)) 1735 return 0; 1736 1737 if (fifo != BRCMF_FWS_FIFO_AC_BE) 1738 fws->borrow_defer_timestamp = jiffies + 1739 BRCMF_FWS_BORROW_DEFER_PERIOD; 1740 1741 if (!(*credit)) { 1742 /* Try to borrow a credit from other queue */ 1743 if (fifo == BRCMF_FWS_FIFO_AC_BE && 1744 brcmf_fws_borrow_credit(fws) == 0) 1745 return 0; 1746 1747 brcmf_dbg(DATA, "exit: ac=%d, credits depleted\n", fifo); 1748 return -ENAVAIL; 1749 } 1750 (*credit)--; 1751 if (!(*credit)) 1752 fws->fifo_credit_map &= ~(1 << fifo); 1753 brcmf_dbg(DATA, "exit: ac=%d, credits=%d\n", fifo, *credit); 1754 return 0; 1755} 1756 1757static int brcmf_fws_commit_skb(struct brcmf_fws_info *fws, int fifo, 1758 struct sk_buff *skb) 1759{ 1760 struct brcmf_skbuff_cb *skcb = brcmf_skbcb(skb); 1761 struct brcmf_fws_mac_descriptor *entry; 1762 struct brcmf_bus *bus = fws->drvr->bus_if; 1763 int rc; 1764 1765 entry = skcb->mac; 1766 if (IS_ERR(entry)) 1767 return PTR_ERR(entry); 1768 1769 rc = brcmf_fws_precommit_skb(fws, fifo, skb); 1770 if (rc < 0) { 1771 fws->stats.generic_error++; 1772 goto rollback; 1773 } 1774 1775 brcmf_dbg(DATA, "%s flags %X htod %X\n", entry->name, skcb->if_flags, 1776 skcb->htod); 1777 rc = brcmf_bus_txdata(bus, skb); 1778 if (rc < 0) 1779 goto rollback; 1780 1781 entry->seq[fifo]++; 1782 fws->stats.pkt2bus++; 1783 if (brcmf_skbcb(skb)->if_flags & BRCMF_SKB_IF_FLAGS_CREDITCHECK_MASK) { 1784 fws->stats.send_pkts[fifo]++; 1785 fws->stats.fifo_credits_sent[fifo]++; 1786 } 1787 1788 return rc; 1789 1790rollback: 1791 brcmf_fws_rollback_toq(fws, skb, fifo); 1792 return rc; 1793} 1794 1795int brcmf_fws_process_skb(struct brcmf_if *ifp, struct sk_buff *skb) 1796{ 1797 struct brcmf_pub *drvr = ifp->drvr; 1798 struct brcmf_fws_info *fws = drvr->fws; 1799 struct brcmf_skbuff_cb *skcb = brcmf_skbcb(skb); 1800 struct ethhdr *eh = (struct ethhdr *)(skb->data); 1801 ulong flags; 1802 int fifo = BRCMF_FWS_FIFO_BCMC; 1803 bool multicast = is_multicast_ether_addr(eh->h_dest); 1804 1805 /* determine the priority */ 1806 if (!skb->priority) 1807 skb->priority = cfg80211_classify8021d(skb); 1808 1809 drvr->tx_multicast += !!multicast; 1810 if (ntohs(eh->h_proto) == ETH_P_PAE) 1811 atomic_inc(&ifp->pend_8021x_cnt); 1812 1813 if (!brcmf_fws_fc_active(fws)) { 1814 /* If the protocol uses a data header, apply it */ 1815 brcmf_proto_hdrpush(drvr, ifp->ifidx, 0, skb); 1816 1817 /* Use bus module to send data frame */ 1818 return brcmf_bus_txdata(drvr->bus_if, skb); 1819 } 1820 1821 /* set control buffer information */ 1822 skcb->if_flags = 0; 1823 skcb->mac = brcmf_fws_find_mac_desc(fws, ifp, eh->h_dest); 1824 skcb->state = BRCMF_FWS_SKBSTATE_NEW; 1825 brcmf_skb_if_flags_set_field(skb, INDEX, ifp->ifidx); 1826 if (!multicast) 1827 fifo = brcmf_fws_prio2fifo[skb->priority]; 1828 1829 brcmf_dbg(DATA, "%s mac %pM multi %d fifo %d\n", skcb->mac->name, 1830 eh->h_dest, multicast, fifo); 1831 1832 brcmf_fws_lock(drvr, flags); 1833 if (skcb->mac->suppressed || 1834 fws->bus_flow_blocked || 1835 brcmf_fws_mac_desc_closed(fws, skcb->mac, fifo) || 1836 brcmu_pktq_mlen(&skcb->mac->psq, 3 << (fifo * 2)) || 1837 (!multicast && 1838 brcmf_fws_consume_credit(fws, fifo, skb) < 0)) { 1839 /* enqueue the packet in delayQ */ 1840 drvr->fws->fifo_delay_map |= 1 << fifo; 1841 brcmf_fws_enq(fws, BRCMF_FWS_SKBSTATE_DELAYED, fifo, skb); 1842 } else { 1843 brcmf_fws_commit_skb(fws, fifo, skb); 1844 } 1845 brcmf_fws_unlock(drvr, flags); 1846 return 0; 1847} 1848 1849void brcmf_fws_reset_interface(struct brcmf_if *ifp) 1850{ 1851 struct brcmf_fws_mac_descriptor *entry = ifp->fws_desc; 1852 1853 brcmf_dbg(TRACE, "enter: idx=%d\n", ifp->bssidx); 1854 if (!entry) 1855 return; 1856 1857 brcmf_fws_init_mac_descriptor(entry, ifp->mac_addr, ifp->ifidx); 1858} 1859 1860void brcmf_fws_add_interface(struct brcmf_if *ifp) 1861{ 1862 struct brcmf_fws_info *fws = ifp->drvr->fws; 1863 struct brcmf_fws_mac_descriptor *entry; 1864 1865 if (!ifp->ndev || !ifp->drvr->fw_signals) 1866 return; 1867 1868 entry = &fws->desc.iface[ifp->ifidx]; 1869 ifp->fws_desc = entry; 1870 brcmf_fws_init_mac_descriptor(entry, ifp->mac_addr, ifp->ifidx); 1871 brcmf_fws_macdesc_set_name(fws, entry); 1872 brcmu_pktq_init(&entry->psq, BRCMF_FWS_PSQ_PREC_COUNT, 1873 BRCMF_FWS_PSQ_LEN); 1874 brcmf_dbg(TRACE, "added %s\n", entry->name); 1875} 1876 1877void brcmf_fws_del_interface(struct brcmf_if *ifp) 1878{ 1879 struct brcmf_fws_mac_descriptor *entry = ifp->fws_desc; 1880 ulong flags; 1881 1882 if (!entry) 1883 return; 1884 1885 brcmf_fws_lock(ifp->drvr, flags); 1886 ifp->fws_desc = NULL; 1887 brcmf_dbg(TRACE, "deleting %s\n", entry->name); 1888 brcmf_fws_clear_mac_descriptor(entry); 1889 brcmf_fws_cleanup(ifp->drvr->fws, ifp->ifidx); 1890 brcmf_fws_unlock(ifp->drvr, flags); 1891} 1892 1893static void brcmf_fws_dequeue_worker(struct work_struct *worker) 1894{ 1895 struct brcmf_fws_info *fws; 1896 struct sk_buff *skb; 1897 ulong flags; 1898 int fifo; 1899 1900 fws = container_of(worker, struct brcmf_fws_info, fws_dequeue_work); 1901 1902 brcmf_fws_lock(fws->drvr, flags); 1903 for (fifo = NL80211_NUM_ACS; fifo >= 0 && !fws->bus_flow_blocked; 1904 fifo--) { 1905 while (fws->fifo_credit[fifo]) { 1906 skb = brcmf_fws_deq(fws, fifo); 1907 if (!skb) 1908 break; 1909 if (brcmf_skbcb(skb)->if_flags & 1910 BRCMF_SKB_IF_FLAGS_CREDITCHECK_MASK) 1911 fws->fifo_credit[fifo]--; 1912 1913 if (brcmf_fws_commit_skb(fws, fifo, skb)) 1914 break; 1915 if (fws->bus_flow_blocked) 1916 break; 1917 } 1918 if ((fifo == BRCMF_FWS_FIFO_AC_BE) && 1919 (fws->fifo_credit[fifo] == 0) && 1920 (!fws->bus_flow_blocked)) { 1921 while (brcmf_fws_borrow_credit(fws) == 0) { 1922 skb = brcmf_fws_deq(fws, fifo); 1923 if (!skb) { 1924 brcmf_fws_return_credits(fws, fifo, 1); 1925 break; 1926 } 1927 brcmf_fws_commit_skb(fws, fifo, skb); 1928 if (fws->bus_flow_blocked) 1929 break; 1930 } 1931 } 1932 } 1933 brcmf_fws_unlock(fws->drvr, flags); 1934} 1935 1936int brcmf_fws_init(struct brcmf_pub *drvr) 1937{ 1938 u32 tlv = BRCMF_FWS_FLAGS_RSSI_SIGNALS; 1939 int rc; 1940 1941 if (!drvr->fw_signals) 1942 return 0; 1943 1944 spin_lock_init(&drvr->fws_spinlock); 1945 1946 drvr->fws = kzalloc(sizeof(*(drvr->fws)), GFP_KERNEL); 1947 if (!drvr->fws) { 1948 rc = -ENOMEM; 1949 goto fail; 1950 } 1951 1952 /* set linkage back */ 1953 drvr->fws->drvr = drvr; 1954 drvr->fws->fcmode = fcmode; 1955 1956 drvr->fws->fws_wq = create_singlethread_workqueue("brcmf_fws_wq"); 1957 if (drvr->fws->fws_wq == NULL) { 1958 brcmf_err("workqueue creation failed\n"); 1959 rc = -EBADF; 1960 goto fail; 1961 } 1962 INIT_WORK(&drvr->fws->fws_dequeue_work, brcmf_fws_dequeue_worker); 1963 1964 /* enable firmware signalling if fcmode active */ 1965 if (drvr->fws->fcmode != BRCMF_FWS_FCMODE_NONE) 1966 tlv |= BRCMF_FWS_FLAGS_XONXOFF_SIGNALS | 1967 BRCMF_FWS_FLAGS_CREDIT_STATUS_SIGNALS | 1968 BRCMF_FWS_FLAGS_HOST_PROPTXSTATUS_ACTIVE; 1969 1970 rc = brcmf_fweh_register(drvr, BRCMF_E_FIFO_CREDIT_MAP, 1971 brcmf_fws_notify_credit_map); 1972 if (rc < 0) { 1973 brcmf_err("register credit map handler failed\n"); 1974 goto fail; 1975 } 1976 1977 /* setting the iovar may fail if feature is unsupported 1978 * so leave the rc as is so driver initialization can 1979 * continue. 1980 */ 1981 if (brcmf_fil_iovar_int_set(drvr->iflist[0], "tlv", tlv)) { 1982 brcmf_err("failed to set bdcv2 tlv signaling\n"); 1983 goto fail_event; 1984 } 1985 1986 brcmf_fws_hanger_init(&drvr->fws->hanger); 1987 brcmf_fws_init_mac_descriptor(&drvr->fws->desc.other, NULL, 0); 1988 brcmf_fws_macdesc_set_name(drvr->fws, &drvr->fws->desc.other); 1989 brcmu_pktq_init(&drvr->fws->desc.other.psq, BRCMF_FWS_PSQ_PREC_COUNT, 1990 BRCMF_FWS_PSQ_LEN); 1991 1992 /* create debugfs file for statistics */ 1993 brcmf_debugfs_create_fws_stats(drvr, &drvr->fws->stats); 1994 1995 brcmf_dbg(INFO, "%s bdcv2 tlv signaling [%x]\n", 1996 drvr->fw_signals ? "enabled" : "disabled", tlv); 1997 return 0; 1998 1999fail_event: 2000 brcmf_fweh_unregister(drvr, BRCMF_E_FIFO_CREDIT_MAP); 2001fail: 2002 brcmf_fws_deinit(drvr); 2003 return rc; 2004} 2005 2006void brcmf_fws_deinit(struct brcmf_pub *drvr) 2007{ 2008 struct brcmf_fws_info *fws = drvr->fws; 2009 ulong flags; 2010 2011 if (!fws) 2012 return; 2013 2014 /* disable firmware signalling entirely 2015 * to avoid using the workqueue. 2016 */ 2017 drvr->fw_signals = false; 2018 2019 if (drvr->fws->fws_wq) 2020 destroy_workqueue(drvr->fws->fws_wq); 2021 2022 /* cleanup */ 2023 brcmf_fws_lock(drvr, flags); 2024 brcmf_fws_cleanup(fws, -1); 2025 drvr->fws = NULL; 2026 brcmf_fws_unlock(drvr, flags); 2027 2028 /* free top structure */ 2029 kfree(fws); 2030} 2031 2032bool brcmf_fws_fc_active(struct brcmf_fws_info *fws) 2033{ 2034 if (!fws) 2035 return false; 2036 2037 return fws->fcmode != BRCMF_FWS_FCMODE_NONE; 2038} 2039 2040void brcmf_fws_bustxfail(struct brcmf_fws_info *fws, struct sk_buff *skb) 2041{ 2042 ulong flags; 2043 int fifo; 2044 2045 brcmf_fws_lock(fws->drvr, flags); 2046 brcmf_fws_txs_process(fws, BRCMF_FWS_TXSTATUS_FW_TOSSED, 2047 brcmf_skb_htod_tag_get_field(skb, HSLOT), 0); 2048 /* the packet never reached firmware so reclaim credit */ 2049 if (fws->fcmode == BRCMF_FWS_FCMODE_EXPLICIT_CREDIT) { 2050 fifo = brcmf_skb_htod_tag_get_field(skb, FIFO); 2051 brcmf_fws_skb_pickup_credit(fws, fifo, skb); 2052 } 2053 brcmf_fws_unlock(fws->drvr, flags); 2054} 2055 2056void brcmf_fws_bus_blocked(struct brcmf_pub *drvr, bool flow_blocked) 2057{ 2058 struct brcmf_fws_info *fws = drvr->fws; 2059 2060 fws->bus_flow_blocked = flow_blocked; 2061 if (!flow_blocked) 2062 brcmf_fws_schedule_deq(fws); 2063} 2064