fwsignal.c revision 456d0685c7522c661bf5af7930317ffcb710a858
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: ea=%pM, ifidx=%u (%u), pkttag=0x%08X, hslot=%d\n", 800 entry->ea, entry->interface_id, 801 brcmf_skb_if_flags_get_field(skb, INDEX), 802 le32_to_cpu(pkttag), (le32_to_cpu(pkttag) >> 8) & 0xffff); 803 if (entry->send_tim_signal) 804 data_offset += 2 + BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP_LEN; 805 806 /* +2 is for Type[1] and Len[1] in TLV, plus TIM signal */ 807 data_offset += 2 + BRCMF_FWS_TYPE_PKTTAG_LEN; 808 fillers = round_up(data_offset, 4) - data_offset; 809 data_offset += fillers; 810 811 skb_push(skb, data_offset); 812 wlh = skb->data; 813 814 wlh[0] = BRCMF_FWS_TYPE_PKTTAG; 815 wlh[1] = BRCMF_FWS_TYPE_PKTTAG_LEN; 816 memcpy(&wlh[2], &pkttag, sizeof(pkttag)); 817 wlh += BRCMF_FWS_TYPE_PKTTAG_LEN + 2; 818 819 if (entry->send_tim_signal) { 820 entry->send_tim_signal = 0; 821 wlh[0] = BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP; 822 wlh[1] = BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP_LEN; 823 wlh[2] = entry->mac_handle; 824 wlh[3] = entry->traffic_pending_bmp; 825 brcmf_dbg(TRACE, "adding TIM info: %02X:%02X:%02X:%02X\n", 826 wlh[0], wlh[1], wlh[2], wlh[3]); 827 wlh += BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP_LEN + 2; 828 entry->traffic_lastreported_bmp = entry->traffic_pending_bmp; 829 } 830 if (fillers) 831 memset(wlh, BRCMF_FWS_TYPE_FILLER, fillers); 832 833 brcmf_proto_hdrpush(fws->drvr, brcmf_skb_if_flags_get_field(skb, INDEX), 834 data_offset >> 2, skb); 835 return 0; 836} 837 838static bool brcmf_fws_tim_update(struct brcmf_fws_info *fws, 839 struct brcmf_fws_mac_descriptor *entry, 840 int fifo, bool send_immediately) 841{ 842 struct sk_buff *skb; 843 struct brcmf_bus *bus; 844 struct brcmf_skbuff_cb *skcb; 845 s32 err; 846 u32 len; 847 848 /* check delayedQ and suppressQ in one call using bitmap */ 849 if (brcmu_pktq_mlen(&entry->psq, 3 << (fifo * 2)) == 0) 850 entry->traffic_pending_bmp &= ~NBITVAL(fifo); 851 else 852 entry->traffic_pending_bmp |= NBITVAL(fifo); 853 854 entry->send_tim_signal = false; 855 if (entry->traffic_lastreported_bmp != entry->traffic_pending_bmp) 856 entry->send_tim_signal = true; 857 if (send_immediately && entry->send_tim_signal && 858 entry->state == BRCMF_FWS_STATE_CLOSE) { 859 /* create a dummy packet and sent that. The traffic */ 860 /* bitmap info will automatically be attached to that packet */ 861 len = BRCMF_FWS_TYPE_PKTTAG_LEN + 2 + 862 BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP_LEN + 2 + 863 4 + fws->drvr->hdrlen; 864 skb = brcmu_pkt_buf_get_skb(len); 865 if (skb == NULL) 866 return false; 867 skb_pull(skb, len); 868 skcb = brcmf_skbcb(skb); 869 skcb->mac = entry; 870 skcb->state = BRCMF_FWS_SKBSTATE_TIM; 871 bus = fws->drvr->bus_if; 872 err = brcmf_fws_hdrpush(fws, skb); 873 if (err == 0) 874 err = brcmf_bus_txdata(bus, skb); 875 if (err) 876 brcmu_pkt_buf_free_skb(skb); 877 return true; 878 } 879 return false; 880} 881 882static void 883brcmf_fws_flow_control_check(struct brcmf_fws_info *fws, struct pktq *pq, 884 u8 if_id) 885{ 886 struct brcmf_if *ifp = fws->drvr->iflist[!if_id ? 0 : if_id + 1]; 887 888 if (WARN_ON(!ifp)) 889 return; 890 891 if ((ifp->netif_stop & BRCMF_NETIF_STOP_REASON_FWS_FC) && 892 pq->len <= BRCMF_FWS_FLOWCONTROL_LOWATER) 893 brcmf_txflowblock_if(ifp, 894 BRCMF_NETIF_STOP_REASON_FWS_FC, false); 895 if (!(ifp->netif_stop & BRCMF_NETIF_STOP_REASON_FWS_FC) && 896 pq->len >= BRCMF_FWS_FLOWCONTROL_HIWATER) { 897 fws->stats.fws_flow_block++; 898 brcmf_txflowblock_if(ifp, BRCMF_NETIF_STOP_REASON_FWS_FC, true); 899 } 900 return; 901} 902 903static int brcmf_fws_rssi_indicate(struct brcmf_fws_info *fws, s8 rssi) 904{ 905 brcmf_dbg(CTL, "rssi %d\n", rssi); 906 return 0; 907} 908 909static 910int brcmf_fws_macdesc_indicate(struct brcmf_fws_info *fws, u8 type, u8 *data) 911{ 912 struct brcmf_fws_mac_descriptor *entry, *existing; 913 u8 mac_handle; 914 u8 ifidx; 915 u8 *addr; 916 917 mac_handle = *data++; 918 ifidx = *data++; 919 addr = data; 920 921 entry = &fws->desc.nodes[mac_handle & 0x1F]; 922 if (type == BRCMF_FWS_TYPE_MACDESC_DEL) { 923 if (entry->occupied) { 924 brcmf_dbg(TRACE, "deleting %s mac %pM\n", 925 entry->name, addr); 926 brcmf_fws_macdesc_cleanup(fws, entry, -1); 927 brcmf_fws_macdesc_deinit(entry); 928 } else 929 fws->stats.mac_update_failed++; 930 return 0; 931 } 932 933 existing = brcmf_fws_macdesc_lookup(fws, addr); 934 if (IS_ERR(existing)) { 935 if (!entry->occupied) { 936 entry->mac_handle = mac_handle; 937 brcmf_fws_macdesc_init(entry, addr, ifidx); 938 brcmf_fws_macdesc_set_name(fws, entry); 939 brcmu_pktq_init(&entry->psq, BRCMF_FWS_PSQ_PREC_COUNT, 940 BRCMF_FWS_PSQ_LEN); 941 brcmf_dbg(TRACE, "add %s mac %pM\n", entry->name, addr); 942 } else { 943 fws->stats.mac_update_failed++; 944 } 945 } else { 946 if (entry != existing) { 947 brcmf_dbg(TRACE, "copy mac %s\n", existing->name); 948 memcpy(entry, existing, 949 offsetof(struct brcmf_fws_mac_descriptor, psq)); 950 entry->mac_handle = mac_handle; 951 brcmf_fws_macdesc_deinit(existing); 952 brcmf_fws_macdesc_set_name(fws, entry); 953 brcmf_dbg(TRACE, "relocate %s mac %pM\n", entry->name, 954 addr); 955 } else { 956 brcmf_dbg(TRACE, "use existing\n"); 957 WARN_ON(entry->mac_handle != mac_handle); 958 /* TODO: what should we do here: continue, reinit, .. */ 959 } 960 } 961 return 0; 962} 963 964static int brcmf_fws_macdesc_state_indicate(struct brcmf_fws_info *fws, 965 u8 type, u8 *data) 966{ 967 struct brcmf_fws_mac_descriptor *entry; 968 u8 mac_handle; 969 970 mac_handle = data[0]; 971 entry = &fws->desc.nodes[mac_handle & 0x1F]; 972 if (!entry->occupied) { 973 fws->stats.mac_ps_update_failed++; 974 return -ESRCH; 975 } 976 /* a state update should wipe old credits */ 977 entry->requested_credit = 0; 978 entry->requested_packet = 0; 979 if (type == BRCMF_FWS_TYPE_MAC_OPEN) { 980 entry->state = BRCMF_FWS_STATE_OPEN; 981 return BRCMF_FWS_RET_OK_SCHEDULE; 982 } else { 983 entry->state = BRCMF_FWS_STATE_CLOSE; 984 brcmf_fws_tim_update(fws, entry, BRCMF_FWS_FIFO_AC_BK, false); 985 brcmf_fws_tim_update(fws, entry, BRCMF_FWS_FIFO_AC_BE, false); 986 brcmf_fws_tim_update(fws, entry, BRCMF_FWS_FIFO_AC_VI, false); 987 brcmf_fws_tim_update(fws, entry, BRCMF_FWS_FIFO_AC_VO, true); 988 } 989 return BRCMF_FWS_RET_OK_NOSCHEDULE; 990} 991 992static int brcmf_fws_interface_state_indicate(struct brcmf_fws_info *fws, 993 u8 type, u8 *data) 994{ 995 struct brcmf_fws_mac_descriptor *entry; 996 u8 ifidx; 997 int ret; 998 999 ifidx = data[0]; 1000 1001 if (ifidx >= BRCMF_MAX_IFS) { 1002 ret = -ERANGE; 1003 goto fail; 1004 } 1005 1006 entry = &fws->desc.iface[ifidx]; 1007 if (!entry->occupied) { 1008 ret = -ESRCH; 1009 goto fail; 1010 } 1011 1012 brcmf_dbg(TRACE, "%s (%d): %s\n", brcmf_fws_get_tlv_name(type), type, 1013 entry->name); 1014 switch (type) { 1015 case BRCMF_FWS_TYPE_INTERFACE_OPEN: 1016 entry->state = BRCMF_FWS_STATE_OPEN; 1017 return BRCMF_FWS_RET_OK_SCHEDULE; 1018 case BRCMF_FWS_TYPE_INTERFACE_CLOSE: 1019 entry->state = BRCMF_FWS_STATE_CLOSE; 1020 return BRCMF_FWS_RET_OK_NOSCHEDULE; 1021 default: 1022 ret = -EINVAL; 1023 break; 1024 } 1025fail: 1026 fws->stats.if_update_failed++; 1027 return ret; 1028} 1029 1030static int brcmf_fws_request_indicate(struct brcmf_fws_info *fws, u8 type, 1031 u8 *data) 1032{ 1033 struct brcmf_fws_mac_descriptor *entry; 1034 1035 entry = &fws->desc.nodes[data[1] & 0x1F]; 1036 if (!entry->occupied) { 1037 if (type == BRCMF_FWS_TYPE_MAC_REQUEST_CREDIT) 1038 fws->stats.credit_request_failed++; 1039 else 1040 fws->stats.packet_request_failed++; 1041 return -ESRCH; 1042 } 1043 1044 brcmf_dbg(TRACE, "%s (%d): %s cnt %d bmp %d\n", 1045 brcmf_fws_get_tlv_name(type), type, entry->name, 1046 data[0], data[2]); 1047 if (type == BRCMF_FWS_TYPE_MAC_REQUEST_CREDIT) 1048 entry->requested_credit = data[0]; 1049 else 1050 entry->requested_packet = data[0]; 1051 1052 entry->ac_bitmap = data[2]; 1053 return BRCMF_FWS_RET_OK_SCHEDULE; 1054} 1055 1056static void 1057brcmf_fws_macdesc_use_req_credit(struct brcmf_fws_mac_descriptor *entry, 1058 struct sk_buff *skb) 1059{ 1060 if (entry->requested_credit > 0) { 1061 entry->requested_credit--; 1062 brcmf_skb_if_flags_set_field(skb, REQUESTED, 1); 1063 brcmf_skb_if_flags_set_field(skb, REQ_CREDIT, 1); 1064 if (entry->state != BRCMF_FWS_STATE_CLOSE) 1065 brcmf_err("requested credit set while mac not closed!\n"); 1066 } else if (entry->requested_packet > 0) { 1067 entry->requested_packet--; 1068 brcmf_skb_if_flags_set_field(skb, REQUESTED, 1); 1069 brcmf_skb_if_flags_set_field(skb, REQ_CREDIT, 0); 1070 if (entry->state != BRCMF_FWS_STATE_CLOSE) 1071 brcmf_err("requested packet set while mac not closed!\n"); 1072 } else { 1073 brcmf_skb_if_flags_set_field(skb, REQUESTED, 0); 1074 brcmf_skb_if_flags_set_field(skb, REQ_CREDIT, 0); 1075 } 1076} 1077 1078static void brcmf_fws_macdesc_return_req_credit(struct sk_buff *skb) 1079{ 1080 struct brcmf_fws_mac_descriptor *entry = brcmf_skbcb(skb)->mac; 1081 1082 if ((brcmf_skb_if_flags_get_field(skb, REQ_CREDIT)) && 1083 (entry->state == BRCMF_FWS_STATE_CLOSE)) 1084 entry->requested_credit++; 1085} 1086 1087static void brcmf_fws_return_credits(struct brcmf_fws_info *fws, 1088 u8 fifo, u8 credits) 1089{ 1090 int lender_ac; 1091 int *borrowed; 1092 int *fifo_credit; 1093 1094 if (!credits) 1095 return; 1096 1097 fws->fifo_credit_map |= 1 << fifo; 1098 1099 if ((fifo == BRCMF_FWS_FIFO_AC_BE) && 1100 (fws->credits_borrowed[0])) { 1101 for (lender_ac = BRCMF_FWS_FIFO_AC_VO; lender_ac >= 0; 1102 lender_ac--) { 1103 borrowed = &fws->credits_borrowed[lender_ac]; 1104 if (*borrowed) { 1105 fws->fifo_credit_map |= (1 << lender_ac); 1106 fifo_credit = &fws->fifo_credit[lender_ac]; 1107 if (*borrowed >= credits) { 1108 *borrowed -= credits; 1109 *fifo_credit += credits; 1110 return; 1111 } else { 1112 credits -= *borrowed; 1113 *fifo_credit += *borrowed; 1114 *borrowed = 0; 1115 } 1116 } 1117 } 1118 } 1119 1120 fws->fifo_credit[fifo] += credits; 1121} 1122 1123static void brcmf_fws_schedule_deq(struct brcmf_fws_info *fws) 1124{ 1125 /* only schedule dequeue when there are credits for delayed traffic */ 1126 if (fws->fifo_credit_map & fws->fifo_delay_map) 1127 queue_work(fws->fws_wq, &fws->fws_dequeue_work); 1128} 1129 1130static int brcmf_fws_enq(struct brcmf_fws_info *fws, 1131 enum brcmf_fws_skb_state state, int fifo, 1132 struct sk_buff *p) 1133{ 1134 int prec = 2 * fifo; 1135 u32 *qfull_stat = &fws->stats.delayq_full_error; 1136 1137 struct brcmf_fws_mac_descriptor *entry; 1138 1139 entry = brcmf_skbcb(p)->mac; 1140 if (entry == NULL) { 1141 brcmf_err("no mac descriptor found for skb %p\n", p); 1142 return -ENOENT; 1143 } 1144 1145 brcmf_dbg(DATA, "enter: fifo %d skb %p\n", fifo, p); 1146 if (state == BRCMF_FWS_SKBSTATE_SUPPRESSED) { 1147 prec += 1; 1148 qfull_stat = &fws->stats.supprq_full_error; 1149 } 1150 1151 if (brcmu_pktq_penq(&entry->psq, prec, p) == NULL) { 1152 *qfull_stat += 1; 1153 return -ENFILE; 1154 } 1155 1156 /* increment total enqueued packet count */ 1157 fws->fifo_delay_map |= 1 << fifo; 1158 fws->fifo_enqpkt[fifo]++; 1159 1160 /* update the sk_buff state */ 1161 brcmf_skbcb(p)->state = state; 1162 1163 /* 1164 * A packet has been pushed so update traffic 1165 * availability bitmap, if applicable 1166 */ 1167 brcmf_fws_tim_update(fws, entry, fifo, true); 1168 brcmf_fws_flow_control_check(fws, &entry->psq, 1169 brcmf_skb_if_flags_get_field(p, INDEX)); 1170 return 0; 1171} 1172 1173static struct sk_buff *brcmf_fws_deq(struct brcmf_fws_info *fws, int fifo) 1174{ 1175 struct brcmf_fws_mac_descriptor *table; 1176 struct brcmf_fws_mac_descriptor *entry; 1177 struct sk_buff *p; 1178 int num_nodes; 1179 int node_pos; 1180 int prec_out; 1181 int pmsk; 1182 int i; 1183 1184 table = (struct brcmf_fws_mac_descriptor *)&fws->desc; 1185 num_nodes = sizeof(fws->desc) / sizeof(struct brcmf_fws_mac_descriptor); 1186 node_pos = fws->deq_node_pos[fifo]; 1187 1188 for (i = 0; i < num_nodes; i++) { 1189 entry = &table[(node_pos + i) % num_nodes]; 1190 if (!entry->occupied || 1191 brcmf_fws_macdesc_closed(fws, entry, fifo)) 1192 continue; 1193 1194 if (entry->suppressed) 1195 pmsk = 2; 1196 else 1197 pmsk = 3; 1198 p = brcmu_pktq_mdeq(&entry->psq, pmsk << (fifo * 2), &prec_out); 1199 if (p == NULL) { 1200 if (entry->suppressed) { 1201 if (entry->suppr_transit_count) 1202 continue; 1203 entry->suppressed = false; 1204 p = brcmu_pktq_mdeq(&entry->psq, 1205 1 << (fifo * 2), &prec_out); 1206 } 1207 } 1208 if (p == NULL) 1209 continue; 1210 1211 brcmf_fws_macdesc_use_req_credit(entry, p); 1212 1213 /* move dequeue position to ensure fair round-robin */ 1214 fws->deq_node_pos[fifo] = (node_pos + i + 1) % num_nodes; 1215 brcmf_fws_flow_control_check(fws, &entry->psq, 1216 brcmf_skb_if_flags_get_field(p, 1217 INDEX) 1218 ); 1219 /* 1220 * A packet has been picked up, update traffic 1221 * availability bitmap, if applicable 1222 */ 1223 brcmf_fws_tim_update(fws, entry, fifo, false); 1224 1225 /* 1226 * decrement total enqueued fifo packets and 1227 * clear delay bitmap if done. 1228 */ 1229 fws->fifo_enqpkt[fifo]--; 1230 if (fws->fifo_enqpkt[fifo] == 0) 1231 fws->fifo_delay_map &= ~(1 << fifo); 1232 goto done; 1233 } 1234 p = NULL; 1235done: 1236 brcmf_dbg(DATA, "exit: fifo %d skb %p\n", fifo, p); 1237 return p; 1238} 1239 1240static int brcmf_fws_txstatus_suppressed(struct brcmf_fws_info *fws, int fifo, 1241 struct sk_buff *skb, u32 genbit) 1242{ 1243 struct brcmf_fws_mac_descriptor *entry = brcmf_skbcb(skb)->mac; 1244 u32 hslot; 1245 int ret; 1246 u8 ifidx; 1247 1248 hslot = brcmf_skb_htod_tag_get_field(skb, HSLOT); 1249 1250 /* this packet was suppressed */ 1251 if (!entry->suppressed) { 1252 entry->suppressed = true; 1253 entry->suppr_transit_count = entry->transit_count; 1254 brcmf_dbg(DATA, "suppress %s: transit %d\n", 1255 entry->name, entry->transit_count); 1256 } 1257 1258 entry->generation = genbit; 1259 1260 ret = brcmf_proto_hdrpull(fws->drvr, false, &ifidx, skb); 1261 if (ret == 0) 1262 ret = brcmf_fws_enq(fws, BRCMF_FWS_SKBSTATE_SUPPRESSED, fifo, 1263 skb); 1264 if (ret != 0) { 1265 /* suppress q is full or hdrpull failed, drop this packet */ 1266 brcmf_fws_hanger_poppkt(&fws->hanger, hslot, &skb, 1267 true); 1268 } else { 1269 /* 1270 * Mark suppressed to avoid a double free during 1271 * wlfc cleanup 1272 */ 1273 brcmf_fws_hanger_mark_suppressed(&fws->hanger, hslot); 1274 } 1275 1276 return ret; 1277} 1278 1279static int 1280brcmf_fws_txs_process(struct brcmf_fws_info *fws, u8 flags, u32 hslot, 1281 u32 genbit) 1282{ 1283 u32 fifo; 1284 int ret; 1285 bool remove_from_hanger = true; 1286 struct sk_buff *skb; 1287 struct brcmf_skbuff_cb *skcb; 1288 struct brcmf_fws_mac_descriptor *entry = NULL; 1289 1290 brcmf_dbg(DATA, "flags %d\n", flags); 1291 1292 if (flags == BRCMF_FWS_TXSTATUS_DISCARD) 1293 fws->stats.txs_discard++; 1294 else if (flags == BRCMF_FWS_TXSTATUS_CORE_SUPPRESS) { 1295 fws->stats.txs_supp_core++; 1296 remove_from_hanger = false; 1297 } else if (flags == BRCMF_FWS_TXSTATUS_FW_PS_SUPPRESS) { 1298 fws->stats.txs_supp_ps++; 1299 remove_from_hanger = false; 1300 } else if (flags == BRCMF_FWS_TXSTATUS_FW_TOSSED) 1301 fws->stats.txs_tossed++; 1302 else if (flags == BRCMF_FWS_TXSTATUS_HOST_TOSSED) 1303 fws->stats.txs_host_tossed++; 1304 else 1305 brcmf_err("unexpected txstatus\n"); 1306 1307 ret = brcmf_fws_hanger_poppkt(&fws->hanger, hslot, &skb, 1308 remove_from_hanger); 1309 if (ret != 0) { 1310 brcmf_err("no packet in hanger slot: hslot=%d\n", hslot); 1311 return ret; 1312 } 1313 1314 skcb = brcmf_skbcb(skb); 1315 entry = skcb->mac; 1316 if (WARN_ON(!entry)) { 1317 brcmu_pkt_buf_free_skb(skb); 1318 return -EINVAL; 1319 } 1320 entry->transit_count--; 1321 if (entry->suppressed && entry->suppr_transit_count) 1322 entry->suppr_transit_count--; 1323 1324 brcmf_dbg(DATA, "%s flags %X htod %X\n", entry->name, skcb->if_flags, 1325 skcb->htod); 1326 1327 /* pick up the implicit credit from this packet */ 1328 fifo = brcmf_skb_htod_tag_get_field(skb, FIFO); 1329 if ((fws->fcmode == BRCMF_FWS_FCMODE_IMPLIED_CREDIT) || 1330 (brcmf_skb_if_flags_get_field(skb, REQ_CREDIT)) || 1331 (flags == BRCMF_FWS_TXSTATUS_HOST_TOSSED)) { 1332 brcmf_fws_return_credits(fws, fifo, 1); 1333 brcmf_fws_schedule_deq(fws); 1334 } 1335 brcmf_fws_macdesc_return_req_credit(skb); 1336 1337 if (!remove_from_hanger) 1338 ret = brcmf_fws_txstatus_suppressed(fws, fifo, skb, genbit); 1339 1340 if (remove_from_hanger || ret) 1341 brcmf_txfinalize(fws->drvr, skb, true); 1342 1343 return 0; 1344} 1345 1346static int brcmf_fws_fifocreditback_indicate(struct brcmf_fws_info *fws, 1347 u8 *data) 1348{ 1349 int i; 1350 1351 if (fws->fcmode != BRCMF_FWS_FCMODE_EXPLICIT_CREDIT) { 1352 brcmf_dbg(INFO, "ignored\n"); 1353 return BRCMF_FWS_RET_OK_NOSCHEDULE; 1354 } 1355 1356 brcmf_dbg(DATA, "enter: data %pM\n", data); 1357 for (i = 0; i < BRCMF_FWS_FIFO_COUNT; i++) 1358 brcmf_fws_return_credits(fws, i, data[i]); 1359 1360 brcmf_dbg(DATA, "map: credit %x delay %x\n", fws->fifo_credit_map, 1361 fws->fifo_delay_map); 1362 return BRCMF_FWS_RET_OK_SCHEDULE; 1363} 1364 1365static int brcmf_fws_txstatus_indicate(struct brcmf_fws_info *fws, u8 *data) 1366{ 1367 __le32 status_le; 1368 u32 status; 1369 u32 hslot; 1370 u32 genbit; 1371 u8 flags; 1372 1373 fws->stats.txs_indicate++; 1374 memcpy(&status_le, data, sizeof(status_le)); 1375 status = le32_to_cpu(status_le); 1376 flags = brcmf_txstatus_get_field(status, FLAGS); 1377 hslot = brcmf_txstatus_get_field(status, HSLOT); 1378 genbit = brcmf_txstatus_get_field(status, GENERATION); 1379 1380 return brcmf_fws_txs_process(fws, flags, hslot, genbit); 1381} 1382 1383static int brcmf_fws_dbg_seqnum_check(struct brcmf_fws_info *fws, u8 *data) 1384{ 1385 __le32 timestamp; 1386 1387 memcpy(×tamp, &data[2], sizeof(timestamp)); 1388 brcmf_dbg(CTL, "received: seq %d, timestamp %d\n", data[1], 1389 le32_to_cpu(timestamp)); 1390 return 0; 1391} 1392 1393/* using macro so sparse checking does not complain 1394 * about locking imbalance. 1395 */ 1396#define brcmf_fws_lock(drvr, flags) \ 1397do { \ 1398 flags = 0; \ 1399 spin_lock_irqsave(&((drvr)->fws_spinlock), (flags)); \ 1400} while (0) 1401 1402/* using macro so sparse checking does not complain 1403 * about locking imbalance. 1404 */ 1405#define brcmf_fws_unlock(drvr, flags) \ 1406 spin_unlock_irqrestore(&((drvr)->fws_spinlock), (flags)) 1407 1408static int brcmf_fws_notify_credit_map(struct brcmf_if *ifp, 1409 const struct brcmf_event_msg *e, 1410 void *data) 1411{ 1412 struct brcmf_fws_info *fws = ifp->drvr->fws; 1413 int i; 1414 ulong flags; 1415 u8 *credits = data; 1416 1417 if (e->datalen < BRCMF_FWS_FIFO_COUNT) { 1418 brcmf_err("event payload too small (%d)\n", e->datalen); 1419 return -EINVAL; 1420 } 1421 if (fws->creditmap_received) 1422 return 0; 1423 1424 fws->creditmap_received = true; 1425 1426 brcmf_dbg(TRACE, "enter: credits %pM\n", credits); 1427 brcmf_fws_lock(ifp->drvr, flags); 1428 for (i = 0; i < ARRAY_SIZE(fws->fifo_credit); i++) { 1429 if (*credits) 1430 fws->fifo_credit_map |= 1 << i; 1431 else 1432 fws->fifo_credit_map &= ~(1 << i); 1433 fws->fifo_credit[i] = *credits++; 1434 } 1435 brcmf_fws_schedule_deq(fws); 1436 brcmf_fws_unlock(ifp->drvr, flags); 1437 return 0; 1438} 1439 1440static int brcmf_fws_notify_bcmc_credit_support(struct brcmf_if *ifp, 1441 const struct brcmf_event_msg *e, 1442 void *data) 1443{ 1444 struct brcmf_fws_info *fws = ifp->drvr->fws; 1445 ulong flags; 1446 1447 brcmf_fws_lock(ifp->drvr, flags); 1448 if (fws) 1449 fws->bcmc_credit_check = true; 1450 brcmf_fws_unlock(ifp->drvr, flags); 1451 return 0; 1452} 1453 1454int brcmf_fws_hdrpull(struct brcmf_pub *drvr, int ifidx, s16 signal_len, 1455 struct sk_buff *skb) 1456{ 1457 struct brcmf_fws_info *fws = drvr->fws; 1458 ulong flags; 1459 u8 *signal_data; 1460 s16 data_len; 1461 u8 type; 1462 u8 len; 1463 u8 *data; 1464 s32 status; 1465 s32 err; 1466 1467 brcmf_dbg(HDRS, "enter: ifidx %d, skblen %u, sig %d\n", 1468 ifidx, skb->len, signal_len); 1469 1470 WARN_ON(signal_len > skb->len); 1471 1472 /* if flow control disabled, skip to packet data and leave */ 1473 if (!signal_len || !drvr->fw_signals) { 1474 skb_pull(skb, signal_len); 1475 return 0; 1476 } 1477 1478 /* lock during tlv parsing */ 1479 brcmf_fws_lock(drvr, flags); 1480 1481 fws->stats.header_pulls++; 1482 data_len = signal_len; 1483 signal_data = skb->data; 1484 1485 status = BRCMF_FWS_RET_OK_NOSCHEDULE; 1486 while (data_len > 0) { 1487 /* extract tlv info */ 1488 type = signal_data[0]; 1489 1490 /* FILLER type is actually not a TLV, but 1491 * a single byte that can be skipped. 1492 */ 1493 if (type == BRCMF_FWS_TYPE_FILLER) { 1494 signal_data += 1; 1495 data_len -= 1; 1496 continue; 1497 } 1498 len = signal_data[1]; 1499 data = signal_data + 2; 1500 1501 brcmf_dbg(HDRS, "tlv type=%s (%d), len=%d (%d)\n", 1502 brcmf_fws_get_tlv_name(type), type, len, 1503 brcmf_fws_get_tlv_len(fws, type)); 1504 1505 /* abort parsing when length invalid */ 1506 if (data_len < len + 2) 1507 break; 1508 1509 if (len < brcmf_fws_get_tlv_len(fws, type)) 1510 break; 1511 1512 err = BRCMF_FWS_RET_OK_NOSCHEDULE; 1513 switch (type) { 1514 case BRCMF_FWS_TYPE_HOST_REORDER_RXPKTS: 1515 case BRCMF_FWS_TYPE_COMP_TXSTATUS: 1516 break; 1517 case BRCMF_FWS_TYPE_MACDESC_ADD: 1518 case BRCMF_FWS_TYPE_MACDESC_DEL: 1519 brcmf_fws_macdesc_indicate(fws, type, data); 1520 break; 1521 case BRCMF_FWS_TYPE_MAC_OPEN: 1522 case BRCMF_FWS_TYPE_MAC_CLOSE: 1523 err = brcmf_fws_macdesc_state_indicate(fws, type, data); 1524 break; 1525 case BRCMF_FWS_TYPE_INTERFACE_OPEN: 1526 case BRCMF_FWS_TYPE_INTERFACE_CLOSE: 1527 err = brcmf_fws_interface_state_indicate(fws, type, 1528 data); 1529 break; 1530 case BRCMF_FWS_TYPE_MAC_REQUEST_CREDIT: 1531 case BRCMF_FWS_TYPE_MAC_REQUEST_PACKET: 1532 err = brcmf_fws_request_indicate(fws, type, data); 1533 break; 1534 case BRCMF_FWS_TYPE_TXSTATUS: 1535 brcmf_fws_txstatus_indicate(fws, data); 1536 break; 1537 case BRCMF_FWS_TYPE_FIFO_CREDITBACK: 1538 err = brcmf_fws_fifocreditback_indicate(fws, data); 1539 break; 1540 case BRCMF_FWS_TYPE_RSSI: 1541 brcmf_fws_rssi_indicate(fws, *data); 1542 break; 1543 case BRCMF_FWS_TYPE_TRANS_ID: 1544 brcmf_fws_dbg_seqnum_check(fws, data); 1545 break; 1546 case BRCMF_FWS_TYPE_PKTTAG: 1547 case BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP: 1548 default: 1549 fws->stats.tlv_invalid_type++; 1550 break; 1551 } 1552 if (err == BRCMF_FWS_RET_OK_SCHEDULE) 1553 status = BRCMF_FWS_RET_OK_SCHEDULE; 1554 signal_data += len + 2; 1555 data_len -= len + 2; 1556 } 1557 1558 if (data_len != 0) 1559 fws->stats.tlv_parse_failed++; 1560 1561 if (status == BRCMF_FWS_RET_OK_SCHEDULE) 1562 brcmf_fws_schedule_deq(fws); 1563 1564 /* signalling processing result does 1565 * not affect the actual ethernet packet. 1566 */ 1567 skb_pull(skb, signal_len); 1568 1569 /* this may be a signal-only packet 1570 */ 1571 if (skb->len == 0) 1572 fws->stats.header_only_pkt++; 1573 1574 brcmf_fws_unlock(drvr, flags); 1575 return 0; 1576} 1577 1578static void brcmf_fws_precommit_skb(struct brcmf_fws_info *fws, int fifo, 1579 struct sk_buff *p) 1580{ 1581 struct brcmf_skbuff_cb *skcb = brcmf_skbcb(p); 1582 struct brcmf_fws_mac_descriptor *entry = skcb->mac; 1583 u8 flags; 1584 1585 brcmf_skb_if_flags_set_field(p, TRANSMIT, 1); 1586 brcmf_skb_htod_tag_set_field(p, GENERATION, entry->generation); 1587 flags = BRCMF_FWS_HTOD_FLAG_PKTFROMHOST; 1588 if (brcmf_skb_if_flags_get_field(p, REQUESTED)) { 1589 /* 1590 * Indicate that this packet is being sent in response to an 1591 * explicit request from the firmware side. 1592 */ 1593 flags |= BRCMF_FWS_HTOD_FLAG_PKT_REQUESTED; 1594 } 1595 brcmf_skb_htod_tag_set_field(p, FLAGS, flags); 1596 brcmf_fws_hdrpush(fws, p); 1597} 1598 1599static void brcmf_fws_rollback_toq(struct brcmf_fws_info *fws, 1600 struct sk_buff *skb, int fifo) 1601{ 1602 struct brcmf_fws_mac_descriptor *entry; 1603 struct sk_buff *pktout; 1604 int qidx, hslot; 1605 int rc = 0; 1606 1607 entry = brcmf_skbcb(skb)->mac; 1608 if (entry->occupied) { 1609 qidx = 2 * fifo; 1610 if (brcmf_skbcb(skb)->state == BRCMF_FWS_SKBSTATE_SUPPRESSED) 1611 qidx++; 1612 1613 pktout = brcmu_pktq_penq_head(&entry->psq, qidx, skb); 1614 if (pktout == NULL) { 1615 brcmf_err("%s queue %d full\n", entry->name, qidx); 1616 rc = -ENOSPC; 1617 } 1618 } else { 1619 brcmf_err("%s entry removed\n", entry->name); 1620 rc = -ENOENT; 1621 } 1622 1623 if (rc) { 1624 fws->stats.rollback_failed++; 1625 hslot = brcmf_skb_htod_tag_get_field(skb, HSLOT); 1626 brcmf_fws_txs_process(fws, BRCMF_FWS_TXSTATUS_HOST_TOSSED, 1627 hslot, 0); 1628 } else { 1629 fws->stats.rollback_success++; 1630 brcmf_fws_return_credits(fws, fifo, 1); 1631 brcmf_fws_macdesc_return_req_credit(skb); 1632 } 1633} 1634 1635static int brcmf_fws_borrow_credit(struct brcmf_fws_info *fws) 1636{ 1637 int lender_ac; 1638 1639 if (time_after(fws->borrow_defer_timestamp, jiffies)) { 1640 fws->fifo_credit_map &= ~(1 << BRCMF_FWS_FIFO_AC_BE); 1641 return -ENAVAIL; 1642 } 1643 1644 for (lender_ac = 0; lender_ac <= BRCMF_FWS_FIFO_AC_VO; lender_ac++) { 1645 if (fws->fifo_credit[lender_ac]) { 1646 fws->credits_borrowed[lender_ac]++; 1647 fws->fifo_credit[lender_ac]--; 1648 if (fws->fifo_credit[lender_ac] == 0) 1649 fws->fifo_credit_map &= ~(1 << lender_ac); 1650 fws->fifo_credit_map |= (1 << BRCMF_FWS_FIFO_AC_BE); 1651 brcmf_dbg(DATA, "borrow credit from: %d\n", lender_ac); 1652 return 0; 1653 } 1654 } 1655 fws->fifo_credit_map &= ~(1 << BRCMF_FWS_FIFO_AC_BE); 1656 return -ENAVAIL; 1657} 1658 1659static int brcmf_fws_commit_skb(struct brcmf_fws_info *fws, int fifo, 1660 struct sk_buff *skb) 1661{ 1662 struct brcmf_skbuff_cb *skcb = brcmf_skbcb(skb); 1663 struct brcmf_fws_mac_descriptor *entry; 1664 struct brcmf_bus *bus = fws->drvr->bus_if; 1665 int rc; 1666 u8 ifidx; 1667 1668 entry = skcb->mac; 1669 if (IS_ERR(entry)) 1670 return PTR_ERR(entry); 1671 1672 brcmf_fws_precommit_skb(fws, fifo, skb); 1673 rc = brcmf_bus_txdata(bus, skb); 1674 brcmf_dbg(DATA, "%s flags %X htod %X bus_tx %d\n", entry->name, 1675 skcb->if_flags, skcb->htod, rc); 1676 if (rc < 0) { 1677 brcmf_proto_hdrpull(fws->drvr, false, &ifidx, skb); 1678 goto rollback; 1679 } 1680 1681 entry->transit_count++; 1682 if (entry->suppressed) 1683 entry->suppr_transit_count++; 1684 fws->stats.pkt2bus++; 1685 fws->stats.send_pkts[fifo]++; 1686 if (brcmf_skb_if_flags_get_field(skb, REQUESTED)) 1687 fws->stats.requested_sent[fifo]++; 1688 1689 return rc; 1690 1691rollback: 1692 brcmf_fws_rollback_toq(fws, skb, fifo); 1693 return rc; 1694} 1695 1696static int brcmf_fws_assign_htod(struct brcmf_fws_info *fws, struct sk_buff *p, 1697 int fifo) 1698{ 1699 struct brcmf_skbuff_cb *skcb = brcmf_skbcb(p); 1700 int rc, hslot; 1701 1702 hslot = brcmf_fws_hanger_get_free_slot(&fws->hanger); 1703 brcmf_skb_htod_tag_set_field(p, HSLOT, hslot); 1704 brcmf_skb_htod_tag_set_field(p, FREERUN, skcb->mac->seq[fifo]); 1705 brcmf_skb_htod_tag_set_field(p, FIFO, fifo); 1706 rc = brcmf_fws_hanger_pushpkt(&fws->hanger, p, hslot); 1707 if (!rc) 1708 skcb->mac->seq[fifo]++; 1709 else 1710 fws->stats.generic_error++; 1711 return rc; 1712} 1713 1714int brcmf_fws_process_skb(struct brcmf_if *ifp, struct sk_buff *skb) 1715{ 1716 struct brcmf_pub *drvr = ifp->drvr; 1717 struct brcmf_fws_info *fws = drvr->fws; 1718 struct brcmf_skbuff_cb *skcb = brcmf_skbcb(skb); 1719 struct ethhdr *eh = (struct ethhdr *)(skb->data); 1720 ulong flags; 1721 int fifo = BRCMF_FWS_FIFO_BCMC; 1722 bool multicast = is_multicast_ether_addr(eh->h_dest); 1723 1724 /* determine the priority */ 1725 if (!skb->priority) 1726 skb->priority = cfg80211_classify8021d(skb); 1727 1728 drvr->tx_multicast += !!multicast; 1729 if (ntohs(eh->h_proto) == ETH_P_PAE) 1730 atomic_inc(&ifp->pend_8021x_cnt); 1731 1732 if (!brcmf_fws_fc_active(fws)) { 1733 /* If the protocol uses a data header, apply it */ 1734 brcmf_proto_hdrpush(drvr, ifp->ifidx, 0, skb); 1735 1736 /* Use bus module to send data frame */ 1737 return brcmf_bus_txdata(drvr->bus_if, skb); 1738 } 1739 1740 /* set control buffer information */ 1741 skcb->if_flags = 0; 1742 skcb->state = BRCMF_FWS_SKBSTATE_NEW; 1743 brcmf_skb_if_flags_set_field(skb, INDEX, ifp->ifidx); 1744 if (!multicast) 1745 fifo = brcmf_fws_prio2fifo[skb->priority]; 1746 1747 brcmf_fws_lock(drvr, flags); 1748 if (fifo != BRCMF_FWS_FIFO_AC_BE && fifo < BRCMF_FWS_FIFO_BCMC) 1749 fws->borrow_defer_timestamp = jiffies + 1750 BRCMF_FWS_BORROW_DEFER_PERIOD; 1751 1752 skcb->mac = brcmf_fws_macdesc_find(fws, ifp, eh->h_dest); 1753 brcmf_dbg(DATA, "%s mac %pM multi %d fifo %d\n", skcb->mac->name, 1754 eh->h_dest, multicast, fifo); 1755 if (!brcmf_fws_assign_htod(fws, skb, fifo)) { 1756 brcmf_fws_enq(fws, BRCMF_FWS_SKBSTATE_DELAYED, fifo, skb); 1757 brcmf_fws_schedule_deq(fws); 1758 } else { 1759 brcmf_err("drop skb: no hanger slot\n"); 1760 brcmu_pkt_buf_free_skb(skb); 1761 } 1762 brcmf_fws_unlock(drvr, flags); 1763 return 0; 1764} 1765 1766void brcmf_fws_reset_interface(struct brcmf_if *ifp) 1767{ 1768 struct brcmf_fws_mac_descriptor *entry = ifp->fws_desc; 1769 1770 brcmf_dbg(TRACE, "enter: idx=%d\n", ifp->bssidx); 1771 if (!entry) 1772 return; 1773 1774 brcmf_fws_macdesc_init(entry, ifp->mac_addr, ifp->ifidx); 1775} 1776 1777void brcmf_fws_add_interface(struct brcmf_if *ifp) 1778{ 1779 struct brcmf_fws_info *fws = ifp->drvr->fws; 1780 struct brcmf_fws_mac_descriptor *entry; 1781 1782 if (!ifp->ndev || !ifp->drvr->fw_signals) 1783 return; 1784 1785 entry = &fws->desc.iface[ifp->ifidx]; 1786 ifp->fws_desc = entry; 1787 brcmf_fws_macdesc_init(entry, ifp->mac_addr, ifp->ifidx); 1788 brcmf_fws_macdesc_set_name(fws, entry); 1789 brcmu_pktq_init(&entry->psq, BRCMF_FWS_PSQ_PREC_COUNT, 1790 BRCMF_FWS_PSQ_LEN); 1791 brcmf_dbg(TRACE, "added %s\n", entry->name); 1792} 1793 1794void brcmf_fws_del_interface(struct brcmf_if *ifp) 1795{ 1796 struct brcmf_fws_mac_descriptor *entry = ifp->fws_desc; 1797 ulong flags; 1798 1799 if (!entry) 1800 return; 1801 1802 brcmf_fws_lock(ifp->drvr, flags); 1803 ifp->fws_desc = NULL; 1804 brcmf_dbg(TRACE, "deleting %s\n", entry->name); 1805 brcmf_fws_macdesc_deinit(entry); 1806 brcmf_fws_cleanup(ifp->drvr->fws, ifp->ifidx); 1807 brcmf_fws_unlock(ifp->drvr, flags); 1808} 1809 1810static void brcmf_fws_dequeue_worker(struct work_struct *worker) 1811{ 1812 struct brcmf_fws_info *fws; 1813 struct sk_buff *skb; 1814 ulong flags; 1815 int fifo; 1816 1817 fws = container_of(worker, struct brcmf_fws_info, fws_dequeue_work); 1818 1819 brcmf_fws_lock(fws->drvr, flags); 1820 for (fifo = BRCMF_FWS_FIFO_BCMC; fifo >= 0 && !fws->bus_flow_blocked; 1821 fifo--) { 1822 while ((fws->fifo_credit[fifo]) || ((!fws->bcmc_credit_check) && 1823 (fifo == BRCMF_FWS_FIFO_BCMC))) { 1824 skb = brcmf_fws_deq(fws, fifo); 1825 if (!skb) 1826 break; 1827 fws->fifo_credit[fifo]--; 1828 if (brcmf_fws_commit_skb(fws, fifo, skb)) 1829 break; 1830 if (fws->bus_flow_blocked) 1831 break; 1832 } 1833 if ((fifo == BRCMF_FWS_FIFO_AC_BE) && 1834 (fws->fifo_credit[fifo] == 0) && 1835 (!fws->bus_flow_blocked)) { 1836 while (brcmf_fws_borrow_credit(fws) == 0) { 1837 skb = brcmf_fws_deq(fws, fifo); 1838 if (!skb) { 1839 brcmf_fws_return_credits(fws, fifo, 1); 1840 break; 1841 } 1842 if (brcmf_fws_commit_skb(fws, fifo, skb)) 1843 break; 1844 if (fws->bus_flow_blocked) 1845 break; 1846 } 1847 } 1848 } 1849 brcmf_fws_unlock(fws->drvr, flags); 1850} 1851 1852int brcmf_fws_init(struct brcmf_pub *drvr) 1853{ 1854 u32 tlv = BRCMF_FWS_FLAGS_RSSI_SIGNALS; 1855 int rc; 1856 1857 if (!drvr->fw_signals) 1858 return 0; 1859 1860 spin_lock_init(&drvr->fws_spinlock); 1861 1862 drvr->fws = kzalloc(sizeof(*(drvr->fws)), GFP_KERNEL); 1863 if (!drvr->fws) { 1864 rc = -ENOMEM; 1865 goto fail; 1866 } 1867 1868 /* set linkage back */ 1869 drvr->fws->drvr = drvr; 1870 drvr->fws->fcmode = fcmode; 1871 1872 drvr->fws->fws_wq = create_singlethread_workqueue("brcmf_fws_wq"); 1873 if (drvr->fws->fws_wq == NULL) { 1874 brcmf_err("workqueue creation failed\n"); 1875 rc = -EBADF; 1876 goto fail; 1877 } 1878 INIT_WORK(&drvr->fws->fws_dequeue_work, brcmf_fws_dequeue_worker); 1879 1880 /* enable firmware signalling if fcmode active */ 1881 if (drvr->fws->fcmode != BRCMF_FWS_FCMODE_NONE) 1882 tlv |= BRCMF_FWS_FLAGS_XONXOFF_SIGNALS | 1883 BRCMF_FWS_FLAGS_CREDIT_STATUS_SIGNALS | 1884 BRCMF_FWS_FLAGS_HOST_PROPTXSTATUS_ACTIVE; 1885 1886 rc = brcmf_fweh_register(drvr, BRCMF_E_FIFO_CREDIT_MAP, 1887 brcmf_fws_notify_credit_map); 1888 if (rc < 0) { 1889 brcmf_err("register credit map handler failed\n"); 1890 goto fail; 1891 } 1892 rc = brcmf_fweh_register(drvr, BRCMF_E_BCMC_CREDIT_SUPPORT, 1893 brcmf_fws_notify_bcmc_credit_support); 1894 if (rc < 0) { 1895 brcmf_err("register bcmc credit handler failed\n"); 1896 brcmf_fweh_unregister(drvr, BRCMF_E_FIFO_CREDIT_MAP); 1897 goto fail; 1898 } 1899 1900 /* setting the iovar may fail if feature is unsupported 1901 * so leave the rc as is so driver initialization can 1902 * continue. 1903 */ 1904 if (brcmf_fil_iovar_int_set(drvr->iflist[0], "tlv", tlv)) { 1905 brcmf_err("failed to set bdcv2 tlv signaling\n"); 1906 goto fail_event; 1907 } 1908 1909 brcmf_fws_hanger_init(&drvr->fws->hanger); 1910 brcmf_fws_macdesc_init(&drvr->fws->desc.other, NULL, 0); 1911 brcmf_fws_macdesc_set_name(drvr->fws, &drvr->fws->desc.other); 1912 brcmu_pktq_init(&drvr->fws->desc.other.psq, BRCMF_FWS_PSQ_PREC_COUNT, 1913 BRCMF_FWS_PSQ_LEN); 1914 1915 /* create debugfs file for statistics */ 1916 brcmf_debugfs_create_fws_stats(drvr, &drvr->fws->stats); 1917 1918 brcmf_dbg(INFO, "%s bdcv2 tlv signaling [%x]\n", 1919 drvr->fw_signals ? "enabled" : "disabled", tlv); 1920 return 0; 1921 1922fail_event: 1923 brcmf_fweh_unregister(drvr, BRCMF_E_BCMC_CREDIT_SUPPORT); 1924 brcmf_fweh_unregister(drvr, BRCMF_E_FIFO_CREDIT_MAP); 1925fail: 1926 brcmf_fws_deinit(drvr); 1927 return rc; 1928} 1929 1930void brcmf_fws_deinit(struct brcmf_pub *drvr) 1931{ 1932 struct brcmf_fws_info *fws = drvr->fws; 1933 ulong flags; 1934 1935 if (!fws) 1936 return; 1937 1938 /* disable firmware signalling entirely 1939 * to avoid using the workqueue. 1940 */ 1941 drvr->fw_signals = false; 1942 1943 if (drvr->fws->fws_wq) 1944 destroy_workqueue(drvr->fws->fws_wq); 1945 1946 /* cleanup */ 1947 brcmf_fws_lock(drvr, flags); 1948 brcmf_fws_cleanup(fws, -1); 1949 drvr->fws = NULL; 1950 brcmf_fws_unlock(drvr, flags); 1951 1952 /* free top structure */ 1953 kfree(fws); 1954} 1955 1956bool brcmf_fws_fc_active(struct brcmf_fws_info *fws) 1957{ 1958 if (!fws) 1959 return false; 1960 1961 return fws->fcmode != BRCMF_FWS_FCMODE_NONE; 1962} 1963 1964void brcmf_fws_bustxfail(struct brcmf_fws_info *fws, struct sk_buff *skb) 1965{ 1966 ulong flags; 1967 u32 hslot; 1968 1969 if (brcmf_skbcb(skb)->state == BRCMF_FWS_SKBSTATE_TIM) { 1970 brcmu_pkt_buf_free_skb(skb); 1971 return; 1972 } 1973 brcmf_fws_lock(fws->drvr, flags); 1974 hslot = brcmf_skb_htod_tag_get_field(skb, HSLOT); 1975 brcmf_fws_txs_process(fws, BRCMF_FWS_TXSTATUS_HOST_TOSSED, hslot, 0); 1976 brcmf_fws_unlock(fws->drvr, flags); 1977} 1978 1979void brcmf_fws_bus_blocked(struct brcmf_pub *drvr, bool flow_blocked) 1980{ 1981 struct brcmf_fws_info *fws = drvr->fws; 1982 1983 fws->bus_flow_blocked = flow_blocked; 1984 if (!flow_blocked) 1985 brcmf_fws_schedule_deq(fws); 1986 else 1987 fws->stats.bus_flow_block++; 1988} 1989