fwsignal.c revision 5491c11c67f2c83c95fa9a26172bc1994580aed7
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 * @bus_flags: 2 bytes reserved for bus specific parameters 172 * @if_flags: holds interface index and packet related flags. 173 * @htod: host to device packet identifier (used in PKTTAG tlv). 174 * @state: transmit state of the packet. 175 * @mac: descriptor related to destination for this packet. 176 * 177 * This information is stored in control buffer struct sk_buff::cb, which 178 * provides 48 bytes of storage so this structure should not exceed that. 179 */ 180struct brcmf_skbuff_cb { 181 u16 bus_flags; 182 u16 if_flags; 183 u32 htod; 184 enum brcmf_fws_skb_state state; 185 struct brcmf_fws_mac_descriptor *mac; 186}; 187 188/* 189 * macro casting skbuff control buffer to struct brcmf_skbuff_cb. 190 */ 191#define brcmf_skbcb(skb) ((struct brcmf_skbuff_cb *)((skb)->cb)) 192 193/* 194 * sk_buff control if flags 195 * 196 * b[11] - packet sent upon firmware request. 197 * b[10] - packet only contains signalling data. 198 * b[9] - packet is a tx packet. 199 * b[8] - packet used requested credit 200 * b[7] - interface in AP mode. 201 * b[3:0] - interface index. 202 */ 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_REQ_CREDIT_MASK 0x0100 210#define BRCMF_SKB_IF_FLAGS_REQ_CREDIT_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_FIRST: first fifo, ie. background. 282 * @BRCMF_FWS_FIFO_AC_BK: fifo for background traffic. 283 * @BRCMF_FWS_FIFO_AC_BE: fifo for best-effort traffic. 284 * @BRCMF_FWS_FIFO_AC_VI: fifo for video traffic. 285 * @BRCMF_FWS_FIFO_AC_VO: fifo for voice traffic. 286 * @BRCMF_FWS_FIFO_BCMC: fifo for broadcast/multicast (AP only). 287 * @BRCMF_FWS_FIFO_ATIM: fifo for ATIM (AP only). 288 * @BRCMF_FWS_FIFO_COUNT: number of fifos. 289 */ 290enum brcmf_fws_fifo { 291 BRCMF_FWS_FIFO_FIRST, 292 BRCMF_FWS_FIFO_AC_BK = BRCMF_FWS_FIFO_FIRST, 293 BRCMF_FWS_FIFO_AC_BE, 294 BRCMF_FWS_FIFO_AC_VI, 295 BRCMF_FWS_FIFO_AC_VO, 296 BRCMF_FWS_FIFO_BCMC, 297 BRCMF_FWS_FIFO_ATIM, 298 BRCMF_FWS_FIFO_COUNT 299}; 300 301/** 302 * enum brcmf_fws_txstatus - txstatus flag values. 303 * 304 * @BRCMF_FWS_TXSTATUS_DISCARD: 305 * host is free to discard the packet. 306 * @BRCMF_FWS_TXSTATUS_CORE_SUPPRESS: 307 * 802.11 core suppressed the packet. 308 * @BRCMF_FWS_TXSTATUS_FW_PS_SUPPRESS: 309 * firmware suppress the packet as device is already in PS mode. 310 * @BRCMF_FWS_TXSTATUS_FW_TOSSED: 311 * firmware tossed the packet. 312 * @BRCMF_FWS_TXSTATUS_HOST_TOSSED: 313 * host tossed the packet. 314 */ 315enum brcmf_fws_txstatus { 316 BRCMF_FWS_TXSTATUS_DISCARD, 317 BRCMF_FWS_TXSTATUS_CORE_SUPPRESS, 318 BRCMF_FWS_TXSTATUS_FW_PS_SUPPRESS, 319 BRCMF_FWS_TXSTATUS_FW_TOSSED, 320 BRCMF_FWS_TXSTATUS_HOST_TOSSED 321}; 322 323enum brcmf_fws_fcmode { 324 BRCMF_FWS_FCMODE_NONE, 325 BRCMF_FWS_FCMODE_IMPLIED_CREDIT, 326 BRCMF_FWS_FCMODE_EXPLICIT_CREDIT 327}; 328 329enum brcmf_fws_mac_desc_state { 330 BRCMF_FWS_STATE_OPEN = 1, 331 BRCMF_FWS_STATE_CLOSE 332}; 333 334/** 335 * struct brcmf_fws_mac_descriptor - firmware signalling data per node/interface 336 * 337 * @occupied: slot is in use. 338 * @mac_handle: handle for mac entry determined by firmware. 339 * @interface_id: interface index. 340 * @state: current state. 341 * @suppressed: mac entry is suppressed. 342 * @generation: generation bit. 343 * @ac_bitmap: ac queue bitmap. 344 * @requested_credit: credits requested by firmware. 345 * @ea: ethernet address. 346 * @seq: per-node free-running sequence. 347 * @psq: power-save queue. 348 * @transit_count: packet in transit to firmware. 349 */ 350struct brcmf_fws_mac_descriptor { 351 char name[16]; 352 u8 occupied; 353 u8 mac_handle; 354 u8 interface_id; 355 u8 state; 356 bool suppressed; 357 u8 generation; 358 u8 ac_bitmap; 359 u8 requested_credit; 360 u8 requested_packet; 361 u8 ea[ETH_ALEN]; 362 u8 seq[BRCMF_FWS_FIFO_COUNT]; 363 struct pktq psq; 364 int transit_count; 365 int suppr_transit_count; 366 bool send_tim_signal; 367 u8 traffic_pending_bmp; 368 u8 traffic_lastreported_bmp; 369}; 370 371#define BRCMF_FWS_HANGER_MAXITEMS 1024 372 373/** 374 * enum brcmf_fws_hanger_item_state - state of hanger item. 375 * 376 * @BRCMF_FWS_HANGER_ITEM_STATE_FREE: item is free for use. 377 * @BRCMF_FWS_HANGER_ITEM_STATE_INUSE: item is in use. 378 * @BRCMF_FWS_HANGER_ITEM_STATE_INUSE_SUPPRESSED: item was suppressed. 379 */ 380enum brcmf_fws_hanger_item_state { 381 BRCMF_FWS_HANGER_ITEM_STATE_FREE = 1, 382 BRCMF_FWS_HANGER_ITEM_STATE_INUSE, 383 BRCMF_FWS_HANGER_ITEM_STATE_INUSE_SUPPRESSED 384}; 385 386 387/** 388 * struct brcmf_fws_hanger_item - single entry for tx pending packet. 389 * 390 * @state: entry is either free or occupied. 391 * @pkt: packet itself. 392 */ 393struct brcmf_fws_hanger_item { 394 enum brcmf_fws_hanger_item_state state; 395 struct sk_buff *pkt; 396}; 397 398/** 399 * struct brcmf_fws_hanger - holds packets awaiting firmware txstatus. 400 * 401 * @pushed: packets pushed to await txstatus. 402 * @popped: packets popped upon handling txstatus. 403 * @failed_to_push: packets that could not be pushed. 404 * @failed_to_pop: packets that could not be popped. 405 * @failed_slotfind: packets for which failed to find an entry. 406 * @slot_pos: last returned item index for a free entry. 407 * @items: array of hanger items. 408 */ 409struct brcmf_fws_hanger { 410 u32 pushed; 411 u32 popped; 412 u32 failed_to_push; 413 u32 failed_to_pop; 414 u32 failed_slotfind; 415 u32 slot_pos; 416 struct brcmf_fws_hanger_item items[BRCMF_FWS_HANGER_MAXITEMS]; 417}; 418 419struct brcmf_fws_macdesc_table { 420 struct brcmf_fws_mac_descriptor nodes[BRCMF_FWS_MAC_DESC_TABLE_SIZE]; 421 struct brcmf_fws_mac_descriptor iface[BRCMF_MAX_IFS]; 422 struct brcmf_fws_mac_descriptor other; 423}; 424 425struct brcmf_fws_info { 426 struct brcmf_pub *drvr; 427 spinlock_t spinlock; 428 ulong flags; 429 struct brcmf_fws_stats stats; 430 struct brcmf_fws_hanger hanger; 431 enum brcmf_fws_fcmode fcmode; 432 bool fw_signals; 433 bool bcmc_credit_check; 434 struct brcmf_fws_macdesc_table desc; 435 struct workqueue_struct *fws_wq; 436 struct work_struct fws_dequeue_work; 437 u32 fifo_enqpkt[BRCMF_FWS_FIFO_COUNT]; 438 int fifo_credit[BRCMF_FWS_FIFO_COUNT]; 439 int credits_borrowed[BRCMF_FWS_FIFO_AC_VO + 1]; 440 int deq_node_pos[BRCMF_FWS_FIFO_COUNT]; 441 u32 fifo_credit_map; 442 u32 fifo_delay_map; 443 unsigned long borrow_defer_timestamp; 444 bool bus_flow_blocked; 445 bool creditmap_received; 446}; 447 448/* 449 * brcmf_fws_prio2fifo - mapping from 802.1d priority to firmware fifo index. 450 */ 451static const int brcmf_fws_prio2fifo[] = { 452 BRCMF_FWS_FIFO_AC_BE, 453 BRCMF_FWS_FIFO_AC_BK, 454 BRCMF_FWS_FIFO_AC_BK, 455 BRCMF_FWS_FIFO_AC_BE, 456 BRCMF_FWS_FIFO_AC_VI, 457 BRCMF_FWS_FIFO_AC_VI, 458 BRCMF_FWS_FIFO_AC_VO, 459 BRCMF_FWS_FIFO_AC_VO 460}; 461 462static int fcmode; 463module_param(fcmode, int, S_IRUSR); 464MODULE_PARM_DESC(fcmode, "mode of firmware signalled flow control"); 465 466#define BRCMF_FWS_TLV_DEF(name, id, len) \ 467 case BRCMF_FWS_TYPE_ ## name: \ 468 return len; 469 470/** 471 * brcmf_fws_get_tlv_len() - returns defined length for given tlv id. 472 * 473 * @fws: firmware-signalling information. 474 * @id: identifier of the TLV. 475 * 476 * Return: the specified length for the given TLV; Otherwise -EINVAL. 477 */ 478static int brcmf_fws_get_tlv_len(struct brcmf_fws_info *fws, 479 enum brcmf_fws_tlv_type id) 480{ 481 switch (id) { 482 BRCMF_FWS_TLV_DEFLIST 483 default: 484 fws->stats.tlv_invalid_type++; 485 break; 486 } 487 return -EINVAL; 488} 489#undef BRCMF_FWS_TLV_DEF 490 491static void brcmf_fws_lock(struct brcmf_fws_info *fws) 492 __acquires(&fws->spinlock) 493{ 494 spin_lock_irqsave(&fws->spinlock, fws->flags); 495} 496 497static void brcmf_fws_unlock(struct brcmf_fws_info *fws) 498 __releases(&fws->spinlock) 499{ 500 spin_unlock_irqrestore(&fws->spinlock, fws->flags); 501} 502 503static bool brcmf_fws_ifidx_match(struct sk_buff *skb, void *arg) 504{ 505 u32 ifidx = brcmf_skb_if_flags_get_field(skb, INDEX); 506 return ifidx == *(int *)arg; 507} 508 509static void brcmf_fws_psq_flush(struct brcmf_fws_info *fws, struct pktq *q, 510 int ifidx) 511{ 512 bool (*matchfn)(struct sk_buff *, void *) = NULL; 513 struct sk_buff *skb; 514 int prec; 515 516 if (ifidx != -1) 517 matchfn = brcmf_fws_ifidx_match; 518 for (prec = 0; prec < q->num_prec; prec++) { 519 skb = brcmu_pktq_pdeq_match(q, prec, matchfn, &ifidx); 520 while (skb) { 521 brcmu_pkt_buf_free_skb(skb); 522 skb = brcmu_pktq_pdeq_match(q, prec, matchfn, &ifidx); 523 } 524 } 525} 526 527static void brcmf_fws_hanger_init(struct brcmf_fws_hanger *hanger) 528{ 529 int i; 530 531 memset(hanger, 0, sizeof(*hanger)); 532 for (i = 0; i < ARRAY_SIZE(hanger->items); i++) 533 hanger->items[i].state = BRCMF_FWS_HANGER_ITEM_STATE_FREE; 534} 535 536static u32 brcmf_fws_hanger_get_free_slot(struct brcmf_fws_hanger *h) 537{ 538 u32 i; 539 540 i = (h->slot_pos + 1) % BRCMF_FWS_HANGER_MAXITEMS; 541 542 while (i != h->slot_pos) { 543 if (h->items[i].state == BRCMF_FWS_HANGER_ITEM_STATE_FREE) { 544 h->slot_pos = i; 545 goto done; 546 } 547 i++; 548 if (i == BRCMF_FWS_HANGER_MAXITEMS) 549 i = 0; 550 } 551 brcmf_err("all slots occupied\n"); 552 h->failed_slotfind++; 553 i = BRCMF_FWS_HANGER_MAXITEMS; 554done: 555 return i; 556} 557 558static int brcmf_fws_hanger_pushpkt(struct brcmf_fws_hanger *h, 559 struct sk_buff *pkt, u32 slot_id) 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("slot is not free\n"); 566 h->failed_to_push++; 567 return -EINVAL; 568 } 569 570 h->items[slot_id].state = BRCMF_FWS_HANGER_ITEM_STATE_INUSE; 571 h->items[slot_id].pkt = pkt; 572 h->pushed++; 573 return 0; 574} 575 576static int brcmf_fws_hanger_poppkt(struct brcmf_fws_hanger *h, 577 u32 slot_id, struct sk_buff **pktout, 578 bool remove_item) 579{ 580 if (slot_id >= BRCMF_FWS_HANGER_MAXITEMS) 581 return -ENOENT; 582 583 if (h->items[slot_id].state == BRCMF_FWS_HANGER_ITEM_STATE_FREE) { 584 brcmf_err("entry not in use\n"); 585 h->failed_to_pop++; 586 return -EINVAL; 587 } 588 589 *pktout = h->items[slot_id].pkt; 590 if (remove_item) { 591 h->items[slot_id].state = BRCMF_FWS_HANGER_ITEM_STATE_FREE; 592 h->items[slot_id].pkt = NULL; 593 h->popped++; 594 } 595 return 0; 596} 597 598static int brcmf_fws_hanger_mark_suppressed(struct brcmf_fws_hanger *h, 599 u32 slot_id) 600{ 601 if (slot_id >= BRCMF_FWS_HANGER_MAXITEMS) 602 return -ENOENT; 603 604 if (h->items[slot_id].state == BRCMF_FWS_HANGER_ITEM_STATE_FREE) { 605 brcmf_err("entry not in use\n"); 606 return -EINVAL; 607 } 608 609 h->items[slot_id].state = BRCMF_FWS_HANGER_ITEM_STATE_INUSE_SUPPRESSED; 610 return 0; 611} 612 613static void brcmf_fws_hanger_cleanup(struct brcmf_fws_info *fws, 614 bool (*fn)(struct sk_buff *, void *), 615 int ifidx) 616{ 617 struct brcmf_fws_hanger *h = &fws->hanger; 618 struct sk_buff *skb; 619 int i; 620 enum brcmf_fws_hanger_item_state s; 621 622 for (i = 0; i < ARRAY_SIZE(h->items); i++) { 623 s = h->items[i].state; 624 if (s == BRCMF_FWS_HANGER_ITEM_STATE_INUSE || 625 s == BRCMF_FWS_HANGER_ITEM_STATE_INUSE_SUPPRESSED) { 626 skb = h->items[i].pkt; 627 if (fn == NULL || fn(skb, &ifidx)) { 628 /* suppress packets freed from psq */ 629 if (s == BRCMF_FWS_HANGER_ITEM_STATE_INUSE) 630 brcmu_pkt_buf_free_skb(skb); 631 h->items[i].state = 632 BRCMF_FWS_HANGER_ITEM_STATE_FREE; 633 } 634 } 635 } 636} 637 638static void brcmf_fws_macdesc_set_name(struct brcmf_fws_info *fws, 639 struct brcmf_fws_mac_descriptor *desc) 640{ 641 if (desc == &fws->desc.other) 642 strlcpy(desc->name, "MAC-OTHER", sizeof(desc->name)); 643 else if (desc->mac_handle) 644 scnprintf(desc->name, sizeof(desc->name), "MAC-%d:%d", 645 desc->mac_handle, desc->interface_id); 646 else 647 scnprintf(desc->name, sizeof(desc->name), "MACIF:%d", 648 desc->interface_id); 649} 650 651static void brcmf_fws_macdesc_init(struct brcmf_fws_mac_descriptor *desc, 652 u8 *addr, u8 ifidx) 653{ 654 brcmf_dbg(TRACE, 655 "enter: desc %p ea=%pM, ifidx=%u\n", desc, addr, ifidx); 656 desc->occupied = 1; 657 desc->state = BRCMF_FWS_STATE_OPEN; 658 desc->requested_credit = 0; 659 desc->requested_packet = 0; 660 /* depending on use may need ifp->bssidx instead */ 661 desc->interface_id = ifidx; 662 desc->ac_bitmap = 0xff; /* update this when handling APSD */ 663 if (addr) 664 memcpy(&desc->ea[0], addr, ETH_ALEN); 665} 666 667static 668void brcmf_fws_macdesc_deinit(struct brcmf_fws_mac_descriptor *desc) 669{ 670 brcmf_dbg(TRACE, 671 "enter: ea=%pM, ifidx=%u\n", desc->ea, desc->interface_id); 672 desc->occupied = 0; 673 desc->state = BRCMF_FWS_STATE_CLOSE; 674 desc->requested_credit = 0; 675 desc->requested_packet = 0; 676} 677 678static struct brcmf_fws_mac_descriptor * 679brcmf_fws_macdesc_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_macdesc_find(struct brcmf_fws_info *fws, struct brcmf_if *ifp, u8 *da) 699{ 700 struct brcmf_fws_mac_descriptor *entry = &fws->desc.other; 701 bool multicast; 702 703 multicast = is_multicast_ether_addr(da); 704 705 /* Multicast destination, STA and P2P clients get the interface entry. 706 * STA/GC gets the Mac Entry for TDLS destinations, TDLS destinations 707 * have their own entry. 708 */ 709 if (multicast && ifp->fws_desc) { 710 entry = ifp->fws_desc; 711 goto done; 712 } 713 714 entry = brcmf_fws_macdesc_lookup(fws, da); 715 if (IS_ERR(entry)) 716 entry = ifp->fws_desc; 717 718done: 719 return entry; 720} 721 722static bool brcmf_fws_macdesc_closed(struct brcmf_fws_info *fws, 723 struct brcmf_fws_mac_descriptor *entry, 724 int fifo) 725{ 726 struct brcmf_fws_mac_descriptor *if_entry; 727 bool closed; 728 729 /* for unique destination entries the related interface 730 * may be closed. 731 */ 732 if (entry->mac_handle) { 733 if_entry = &fws->desc.iface[entry->interface_id]; 734 if (if_entry->state == BRCMF_FWS_STATE_CLOSE) 735 return true; 736 } 737 /* an entry is closed when the state is closed and 738 * the firmware did not request anything. 739 */ 740 closed = entry->state == BRCMF_FWS_STATE_CLOSE && 741 !entry->requested_credit && !entry->requested_packet; 742 743 /* Or firmware does not allow traffic for given fifo */ 744 return closed || !(entry->ac_bitmap & BIT(fifo)); 745} 746 747static void brcmf_fws_macdesc_cleanup(struct brcmf_fws_info *fws, 748 struct brcmf_fws_mac_descriptor *entry, 749 int ifidx) 750{ 751 if (entry->occupied && (ifidx == -1 || ifidx == entry->interface_id)) { 752 brcmf_fws_psq_flush(fws, &entry->psq, ifidx); 753 entry->occupied = !!(entry->psq.len); 754 } 755} 756 757static void brcmf_fws_bus_txq_cleanup(struct brcmf_fws_info *fws, 758 bool (*fn)(struct sk_buff *, void *), 759 int ifidx) 760{ 761 struct brcmf_fws_hanger_item *hi; 762 struct pktq *txq; 763 struct sk_buff *skb; 764 int prec; 765 u32 hslot; 766 767 txq = brcmf_bus_gettxq(fws->drvr->bus_if); 768 if (IS_ERR(txq)) { 769 brcmf_dbg(TRACE, "no txq to clean up\n"); 770 return; 771 } 772 773 for (prec = 0; prec < txq->num_prec; prec++) { 774 skb = brcmu_pktq_pdeq_match(txq, prec, fn, &ifidx); 775 while (skb) { 776 hslot = brcmf_skb_htod_tag_get_field(skb, HSLOT); 777 hi = &fws->hanger.items[hslot]; 778 WARN_ON(skb != hi->pkt); 779 hi->state = BRCMF_FWS_HANGER_ITEM_STATE_FREE; 780 brcmu_pkt_buf_free_skb(skb); 781 skb = brcmu_pktq_pdeq_match(txq, prec, fn, &ifidx); 782 } 783 } 784} 785 786static void brcmf_fws_cleanup(struct brcmf_fws_info *fws, int ifidx) 787{ 788 int i; 789 struct brcmf_fws_mac_descriptor *table; 790 bool (*matchfn)(struct sk_buff *, void *) = NULL; 791 792 if (fws == NULL) 793 return; 794 795 if (ifidx != -1) 796 matchfn = brcmf_fws_ifidx_match; 797 798 /* cleanup individual nodes */ 799 table = &fws->desc.nodes[0]; 800 for (i = 0; i < ARRAY_SIZE(fws->desc.nodes); i++) 801 brcmf_fws_macdesc_cleanup(fws, &table[i], ifidx); 802 803 brcmf_fws_macdesc_cleanup(fws, &fws->desc.other, ifidx); 804 brcmf_fws_bus_txq_cleanup(fws, matchfn, ifidx); 805 brcmf_fws_hanger_cleanup(fws, matchfn, ifidx); 806} 807 808static int brcmf_fws_hdrpush(struct brcmf_fws_info *fws, struct sk_buff *skb) 809{ 810 struct brcmf_fws_mac_descriptor *entry = brcmf_skbcb(skb)->mac; 811 u8 *wlh; 812 u16 data_offset = 0; 813 u8 fillers; 814 __le32 pkttag = cpu_to_le32(brcmf_skbcb(skb)->htod); 815 816 brcmf_dbg(TRACE, "enter: %s, idx=%d pkttag=0x%08X, hslot=%d\n", 817 entry->name, brcmf_skb_if_flags_get_field(skb, INDEX), 818 le32_to_cpu(pkttag), (le32_to_cpu(pkttag) >> 8) & 0xffff); 819 if (entry->send_tim_signal) 820 data_offset += 2 + BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP_LEN; 821 822 /* +2 is for Type[1] and Len[1] in TLV, plus TIM signal */ 823 data_offset += 2 + BRCMF_FWS_TYPE_PKTTAG_LEN; 824 fillers = round_up(data_offset, 4) - data_offset; 825 data_offset += fillers; 826 827 skb_push(skb, data_offset); 828 wlh = skb->data; 829 830 wlh[0] = BRCMF_FWS_TYPE_PKTTAG; 831 wlh[1] = BRCMF_FWS_TYPE_PKTTAG_LEN; 832 memcpy(&wlh[2], &pkttag, sizeof(pkttag)); 833 wlh += BRCMF_FWS_TYPE_PKTTAG_LEN + 2; 834 835 if (entry->send_tim_signal) { 836 entry->send_tim_signal = 0; 837 wlh[0] = BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP; 838 wlh[1] = BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP_LEN; 839 wlh[2] = entry->mac_handle; 840 wlh[3] = entry->traffic_pending_bmp; 841 brcmf_dbg(TRACE, "adding TIM info: handle %d bmp 0x%X\n", 842 entry->mac_handle, entry->traffic_pending_bmp); 843 wlh += BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP_LEN + 2; 844 entry->traffic_lastreported_bmp = entry->traffic_pending_bmp; 845 } 846 if (fillers) 847 memset(wlh, BRCMF_FWS_TYPE_FILLER, fillers); 848 849 brcmf_proto_hdrpush(fws->drvr, brcmf_skb_if_flags_get_field(skb, INDEX), 850 data_offset >> 2, skb); 851 return 0; 852} 853 854static bool brcmf_fws_tim_update(struct brcmf_fws_info *fws, 855 struct brcmf_fws_mac_descriptor *entry, 856 int fifo, bool send_immediately) 857{ 858 struct sk_buff *skb; 859 struct brcmf_bus *bus; 860 struct brcmf_skbuff_cb *skcb; 861 s32 err; 862 u32 len; 863 864 /* check delayedQ and suppressQ in one call using bitmap */ 865 if (brcmu_pktq_mlen(&entry->psq, 3 << (fifo * 2)) == 0) 866 entry->traffic_pending_bmp &= ~NBITVAL(fifo); 867 else 868 entry->traffic_pending_bmp |= NBITVAL(fifo); 869 870 entry->send_tim_signal = false; 871 if (entry->traffic_lastreported_bmp != entry->traffic_pending_bmp) 872 entry->send_tim_signal = true; 873 if (send_immediately && entry->send_tim_signal && 874 entry->state == BRCMF_FWS_STATE_CLOSE) { 875 /* create a dummy packet and sent that. The traffic */ 876 /* bitmap info will automatically be attached to that packet */ 877 len = BRCMF_FWS_TYPE_PKTTAG_LEN + 2 + 878 BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP_LEN + 2 + 879 4 + fws->drvr->hdrlen; 880 skb = brcmu_pkt_buf_get_skb(len); 881 if (skb == NULL) 882 return false; 883 skb_pull(skb, len); 884 skcb = brcmf_skbcb(skb); 885 skcb->mac = entry; 886 skcb->state = BRCMF_FWS_SKBSTATE_TIM; 887 bus = fws->drvr->bus_if; 888 err = brcmf_fws_hdrpush(fws, skb); 889 if (err == 0) { 890 brcmf_fws_unlock(fws); 891 err = brcmf_bus_txdata(bus, skb); 892 brcmf_fws_lock(fws); 893 } 894 if (err) 895 brcmu_pkt_buf_free_skb(skb); 896 return true; 897 } 898 return false; 899} 900 901static void 902brcmf_fws_flow_control_check(struct brcmf_fws_info *fws, struct pktq *pq, 903 u8 if_id) 904{ 905 struct brcmf_if *ifp = fws->drvr->iflist[!if_id ? 0 : if_id + 1]; 906 907 if (WARN_ON(!ifp)) 908 return; 909 910 if ((ifp->netif_stop & BRCMF_NETIF_STOP_REASON_FWS_FC) && 911 pq->len <= BRCMF_FWS_FLOWCONTROL_LOWATER) 912 brcmf_txflowblock_if(ifp, 913 BRCMF_NETIF_STOP_REASON_FWS_FC, false); 914 if (!(ifp->netif_stop & BRCMF_NETIF_STOP_REASON_FWS_FC) && 915 pq->len >= BRCMF_FWS_FLOWCONTROL_HIWATER) { 916 fws->stats.fws_flow_block++; 917 brcmf_txflowblock_if(ifp, BRCMF_NETIF_STOP_REASON_FWS_FC, true); 918 } 919 return; 920} 921 922static int brcmf_fws_rssi_indicate(struct brcmf_fws_info *fws, s8 rssi) 923{ 924 brcmf_dbg(CTL, "rssi %d\n", rssi); 925 return 0; 926} 927 928static 929int brcmf_fws_macdesc_indicate(struct brcmf_fws_info *fws, u8 type, u8 *data) 930{ 931 struct brcmf_fws_mac_descriptor *entry, *existing; 932 u8 mac_handle; 933 u8 ifidx; 934 u8 *addr; 935 936 mac_handle = *data++; 937 ifidx = *data++; 938 addr = data; 939 940 entry = &fws->desc.nodes[mac_handle & 0x1F]; 941 if (type == BRCMF_FWS_TYPE_MACDESC_DEL) { 942 if (entry->occupied) { 943 brcmf_dbg(TRACE, "deleting %s mac %pM\n", 944 entry->name, addr); 945 brcmf_fws_lock(fws); 946 brcmf_fws_macdesc_cleanup(fws, entry, -1); 947 brcmf_fws_macdesc_deinit(entry); 948 brcmf_fws_unlock(fws); 949 } else 950 fws->stats.mac_update_failed++; 951 return 0; 952 } 953 954 existing = brcmf_fws_macdesc_lookup(fws, addr); 955 if (IS_ERR(existing)) { 956 if (!entry->occupied) { 957 brcmf_fws_lock(fws); 958 entry->mac_handle = mac_handle; 959 brcmf_fws_macdesc_init(entry, addr, ifidx); 960 brcmf_fws_macdesc_set_name(fws, entry); 961 brcmu_pktq_init(&entry->psq, BRCMF_FWS_PSQ_PREC_COUNT, 962 BRCMF_FWS_PSQ_LEN); 963 brcmf_fws_unlock(fws); 964 brcmf_dbg(TRACE, "add %s mac %pM\n", entry->name, addr); 965 } else { 966 fws->stats.mac_update_failed++; 967 } 968 } else { 969 if (entry != existing) { 970 brcmf_dbg(TRACE, "copy mac %s\n", existing->name); 971 brcmf_fws_lock(fws); 972 memcpy(entry, existing, 973 offsetof(struct brcmf_fws_mac_descriptor, psq)); 974 entry->mac_handle = mac_handle; 975 brcmf_fws_macdesc_deinit(existing); 976 brcmf_fws_macdesc_set_name(fws, entry); 977 brcmf_fws_unlock(fws); 978 brcmf_dbg(TRACE, "relocate %s mac %pM\n", entry->name, 979 addr); 980 } else { 981 brcmf_dbg(TRACE, "use existing\n"); 982 WARN_ON(entry->mac_handle != mac_handle); 983 /* TODO: what should we do here: continue, reinit, .. */ 984 } 985 } 986 return 0; 987} 988 989static int brcmf_fws_macdesc_state_indicate(struct brcmf_fws_info *fws, 990 u8 type, u8 *data) 991{ 992 struct brcmf_fws_mac_descriptor *entry; 993 u8 mac_handle; 994 int ret; 995 996 mac_handle = data[0]; 997 entry = &fws->desc.nodes[mac_handle & 0x1F]; 998 if (!entry->occupied) { 999 fws->stats.mac_ps_update_failed++; 1000 return -ESRCH; 1001 } 1002 brcmf_fws_lock(fws); 1003 /* a state update should wipe old credits */ 1004 entry->requested_credit = 0; 1005 entry->requested_packet = 0; 1006 if (type == BRCMF_FWS_TYPE_MAC_OPEN) { 1007 entry->state = BRCMF_FWS_STATE_OPEN; 1008 ret = BRCMF_FWS_RET_OK_SCHEDULE; 1009 } else { 1010 entry->state = BRCMF_FWS_STATE_CLOSE; 1011 brcmf_fws_tim_update(fws, entry, BRCMF_FWS_FIFO_AC_BK, false); 1012 brcmf_fws_tim_update(fws, entry, BRCMF_FWS_FIFO_AC_BE, false); 1013 brcmf_fws_tim_update(fws, entry, BRCMF_FWS_FIFO_AC_VI, false); 1014 brcmf_fws_tim_update(fws, entry, BRCMF_FWS_FIFO_AC_VO, true); 1015 ret = BRCMF_FWS_RET_OK_NOSCHEDULE; 1016 } 1017 brcmf_fws_unlock(fws); 1018 return ret; 1019} 1020 1021static int brcmf_fws_interface_state_indicate(struct brcmf_fws_info *fws, 1022 u8 type, u8 *data) 1023{ 1024 struct brcmf_fws_mac_descriptor *entry; 1025 u8 ifidx; 1026 int ret; 1027 1028 ifidx = data[0]; 1029 1030 if (ifidx >= BRCMF_MAX_IFS) { 1031 ret = -ERANGE; 1032 goto fail; 1033 } 1034 1035 entry = &fws->desc.iface[ifidx]; 1036 if (!entry->occupied) { 1037 ret = -ESRCH; 1038 goto fail; 1039 } 1040 1041 brcmf_dbg(TRACE, "%s (%d): %s\n", brcmf_fws_get_tlv_name(type), type, 1042 entry->name); 1043 brcmf_fws_lock(fws); 1044 switch (type) { 1045 case BRCMF_FWS_TYPE_INTERFACE_OPEN: 1046 entry->state = BRCMF_FWS_STATE_OPEN; 1047 ret = BRCMF_FWS_RET_OK_SCHEDULE; 1048 break; 1049 case BRCMF_FWS_TYPE_INTERFACE_CLOSE: 1050 entry->state = BRCMF_FWS_STATE_CLOSE; 1051 ret = BRCMF_FWS_RET_OK_NOSCHEDULE; 1052 break; 1053 default: 1054 ret = -EINVAL; 1055 brcmf_fws_unlock(fws); 1056 goto fail; 1057 } 1058 brcmf_fws_unlock(fws); 1059 return ret; 1060 1061fail: 1062 fws->stats.if_update_failed++; 1063 return ret; 1064} 1065 1066static int brcmf_fws_request_indicate(struct brcmf_fws_info *fws, u8 type, 1067 u8 *data) 1068{ 1069 struct brcmf_fws_mac_descriptor *entry; 1070 1071 entry = &fws->desc.nodes[data[1] & 0x1F]; 1072 if (!entry->occupied) { 1073 if (type == BRCMF_FWS_TYPE_MAC_REQUEST_CREDIT) 1074 fws->stats.credit_request_failed++; 1075 else 1076 fws->stats.packet_request_failed++; 1077 return -ESRCH; 1078 } 1079 1080 brcmf_dbg(TRACE, "%s (%d): %s cnt %d bmp %d\n", 1081 brcmf_fws_get_tlv_name(type), type, entry->name, 1082 data[0], data[2]); 1083 brcmf_fws_lock(fws); 1084 if (type == BRCMF_FWS_TYPE_MAC_REQUEST_CREDIT) 1085 entry->requested_credit = data[0]; 1086 else 1087 entry->requested_packet = data[0]; 1088 1089 entry->ac_bitmap = data[2]; 1090 brcmf_fws_unlock(fws); 1091 return BRCMF_FWS_RET_OK_SCHEDULE; 1092} 1093 1094static void 1095brcmf_fws_macdesc_use_req_credit(struct brcmf_fws_mac_descriptor *entry, 1096 struct sk_buff *skb) 1097{ 1098 if (entry->requested_credit > 0) { 1099 entry->requested_credit--; 1100 brcmf_skb_if_flags_set_field(skb, REQUESTED, 1); 1101 brcmf_skb_if_flags_set_field(skb, REQ_CREDIT, 1); 1102 if (entry->state != BRCMF_FWS_STATE_CLOSE) 1103 brcmf_err("requested credit set while mac not closed!\n"); 1104 } else if (entry->requested_packet > 0) { 1105 entry->requested_packet--; 1106 brcmf_skb_if_flags_set_field(skb, REQUESTED, 1); 1107 brcmf_skb_if_flags_set_field(skb, REQ_CREDIT, 0); 1108 if (entry->state != BRCMF_FWS_STATE_CLOSE) 1109 brcmf_err("requested packet set while mac not closed!\n"); 1110 } else { 1111 brcmf_skb_if_flags_set_field(skb, REQUESTED, 0); 1112 brcmf_skb_if_flags_set_field(skb, REQ_CREDIT, 0); 1113 } 1114} 1115 1116static void brcmf_fws_macdesc_return_req_credit(struct sk_buff *skb) 1117{ 1118 struct brcmf_fws_mac_descriptor *entry = brcmf_skbcb(skb)->mac; 1119 1120 if ((brcmf_skb_if_flags_get_field(skb, REQ_CREDIT)) && 1121 (entry->state == BRCMF_FWS_STATE_CLOSE)) 1122 entry->requested_credit++; 1123} 1124 1125static void brcmf_fws_return_credits(struct brcmf_fws_info *fws, 1126 u8 fifo, u8 credits) 1127{ 1128 int lender_ac; 1129 int *borrowed; 1130 int *fifo_credit; 1131 1132 if (!credits) 1133 return; 1134 1135 fws->fifo_credit_map |= 1 << fifo; 1136 1137 if ((fifo == BRCMF_FWS_FIFO_AC_BE) && 1138 (fws->credits_borrowed[0])) { 1139 for (lender_ac = BRCMF_FWS_FIFO_AC_VO; lender_ac >= 0; 1140 lender_ac--) { 1141 borrowed = &fws->credits_borrowed[lender_ac]; 1142 if (*borrowed) { 1143 fws->fifo_credit_map |= (1 << lender_ac); 1144 fifo_credit = &fws->fifo_credit[lender_ac]; 1145 if (*borrowed >= credits) { 1146 *borrowed -= credits; 1147 *fifo_credit += credits; 1148 return; 1149 } else { 1150 credits -= *borrowed; 1151 *fifo_credit += *borrowed; 1152 *borrowed = 0; 1153 } 1154 } 1155 } 1156 } 1157 1158 fws->fifo_credit[fifo] += credits; 1159} 1160 1161static void brcmf_fws_schedule_deq(struct brcmf_fws_info *fws) 1162{ 1163 /* only schedule dequeue when there are credits for delayed traffic */ 1164 if ((fws->fifo_credit_map & fws->fifo_delay_map) || 1165 (!brcmf_fws_fc_active(fws) && fws->fifo_delay_map)) 1166 queue_work(fws->fws_wq, &fws->fws_dequeue_work); 1167} 1168 1169static int brcmf_fws_enq(struct brcmf_fws_info *fws, 1170 enum brcmf_fws_skb_state state, int fifo, 1171 struct sk_buff *p) 1172{ 1173 int prec = 2 * fifo; 1174 u32 *qfull_stat = &fws->stats.delayq_full_error; 1175 1176 struct brcmf_fws_mac_descriptor *entry; 1177 1178 entry = brcmf_skbcb(p)->mac; 1179 if (entry == NULL) { 1180 brcmf_err("no mac descriptor found for skb %p\n", p); 1181 return -ENOENT; 1182 } 1183 1184 brcmf_dbg(DATA, "enter: fifo %d skb %p\n", fifo, p); 1185 if (state == BRCMF_FWS_SKBSTATE_SUPPRESSED) { 1186 prec += 1; 1187 qfull_stat = &fws->stats.supprq_full_error; 1188 } 1189 1190 if (brcmu_pktq_penq(&entry->psq, prec, p) == NULL) { 1191 *qfull_stat += 1; 1192 return -ENFILE; 1193 } 1194 1195 /* increment total enqueued packet count */ 1196 fws->fifo_delay_map |= 1 << fifo; 1197 fws->fifo_enqpkt[fifo]++; 1198 1199 /* update the sk_buff state */ 1200 brcmf_skbcb(p)->state = state; 1201 1202 /* 1203 * A packet has been pushed so update traffic 1204 * availability bitmap, if applicable 1205 */ 1206 brcmf_fws_tim_update(fws, entry, fifo, true); 1207 brcmf_fws_flow_control_check(fws, &entry->psq, 1208 brcmf_skb_if_flags_get_field(p, INDEX)); 1209 return 0; 1210} 1211 1212static struct sk_buff *brcmf_fws_deq(struct brcmf_fws_info *fws, int fifo) 1213{ 1214 struct brcmf_fws_mac_descriptor *table; 1215 struct brcmf_fws_mac_descriptor *entry; 1216 struct sk_buff *p; 1217 int num_nodes; 1218 int node_pos; 1219 int prec_out; 1220 int pmsk; 1221 int i; 1222 1223 table = (struct brcmf_fws_mac_descriptor *)&fws->desc; 1224 num_nodes = sizeof(fws->desc) / sizeof(struct brcmf_fws_mac_descriptor); 1225 node_pos = fws->deq_node_pos[fifo]; 1226 1227 for (i = 0; i < num_nodes; i++) { 1228 entry = &table[(node_pos + i) % num_nodes]; 1229 if (!entry->occupied || 1230 brcmf_fws_macdesc_closed(fws, entry, fifo)) 1231 continue; 1232 1233 if (entry->suppressed) 1234 pmsk = 2; 1235 else 1236 pmsk = 3; 1237 p = brcmu_pktq_mdeq(&entry->psq, pmsk << (fifo * 2), &prec_out); 1238 if (p == NULL) { 1239 if (entry->suppressed) { 1240 if (entry->suppr_transit_count) 1241 continue; 1242 entry->suppressed = false; 1243 p = brcmu_pktq_mdeq(&entry->psq, 1244 1 << (fifo * 2), &prec_out); 1245 } 1246 } 1247 if (p == NULL) 1248 continue; 1249 1250 brcmf_fws_macdesc_use_req_credit(entry, p); 1251 1252 /* move dequeue position to ensure fair round-robin */ 1253 fws->deq_node_pos[fifo] = (node_pos + i + 1) % num_nodes; 1254 brcmf_fws_flow_control_check(fws, &entry->psq, 1255 brcmf_skb_if_flags_get_field(p, 1256 INDEX) 1257 ); 1258 /* 1259 * A packet has been picked up, update traffic 1260 * availability bitmap, if applicable 1261 */ 1262 brcmf_fws_tim_update(fws, entry, fifo, false); 1263 1264 /* 1265 * decrement total enqueued fifo packets and 1266 * clear delay bitmap if done. 1267 */ 1268 fws->fifo_enqpkt[fifo]--; 1269 if (fws->fifo_enqpkt[fifo] == 0) 1270 fws->fifo_delay_map &= ~(1 << fifo); 1271 goto done; 1272 } 1273 p = NULL; 1274done: 1275 brcmf_dbg(DATA, "exit: fifo %d skb %p\n", fifo, p); 1276 return p; 1277} 1278 1279static int brcmf_fws_txstatus_suppressed(struct brcmf_fws_info *fws, int fifo, 1280 struct sk_buff *skb, u32 genbit) 1281{ 1282 struct brcmf_fws_mac_descriptor *entry = brcmf_skbcb(skb)->mac; 1283 u32 hslot; 1284 int ret; 1285 u8 ifidx; 1286 1287 hslot = brcmf_skb_htod_tag_get_field(skb, HSLOT); 1288 1289 /* this packet was suppressed */ 1290 if (!entry->suppressed) { 1291 entry->suppressed = true; 1292 entry->suppr_transit_count = entry->transit_count; 1293 brcmf_dbg(DATA, "suppress %s: transit %d\n", 1294 entry->name, entry->transit_count); 1295 } 1296 1297 entry->generation = genbit; 1298 1299 ret = brcmf_proto_hdrpull(fws->drvr, false, &ifidx, skb); 1300 if (ret == 0) 1301 ret = brcmf_fws_enq(fws, BRCMF_FWS_SKBSTATE_SUPPRESSED, fifo, 1302 skb); 1303 if (ret != 0) { 1304 /* suppress q is full or hdrpull failed, drop this packet */ 1305 brcmf_fws_hanger_poppkt(&fws->hanger, hslot, &skb, 1306 true); 1307 } else { 1308 /* 1309 * Mark suppressed to avoid a double free during 1310 * wlfc cleanup 1311 */ 1312 brcmf_fws_hanger_mark_suppressed(&fws->hanger, hslot); 1313 } 1314 1315 return ret; 1316} 1317 1318static int 1319brcmf_fws_txs_process(struct brcmf_fws_info *fws, u8 flags, u32 hslot, 1320 u32 genbit) 1321{ 1322 u32 fifo; 1323 int ret; 1324 bool remove_from_hanger = true; 1325 struct sk_buff *skb; 1326 struct brcmf_skbuff_cb *skcb; 1327 struct brcmf_fws_mac_descriptor *entry = NULL; 1328 1329 brcmf_dbg(DATA, "flags %d\n", flags); 1330 1331 if (flags == BRCMF_FWS_TXSTATUS_DISCARD) 1332 fws->stats.txs_discard++; 1333 else if (flags == BRCMF_FWS_TXSTATUS_CORE_SUPPRESS) { 1334 fws->stats.txs_supp_core++; 1335 remove_from_hanger = false; 1336 } else if (flags == BRCMF_FWS_TXSTATUS_FW_PS_SUPPRESS) { 1337 fws->stats.txs_supp_ps++; 1338 remove_from_hanger = false; 1339 } else if (flags == BRCMF_FWS_TXSTATUS_FW_TOSSED) 1340 fws->stats.txs_tossed++; 1341 else if (flags == BRCMF_FWS_TXSTATUS_HOST_TOSSED) 1342 fws->stats.txs_host_tossed++; 1343 else 1344 brcmf_err("unexpected txstatus\n"); 1345 1346 ret = brcmf_fws_hanger_poppkt(&fws->hanger, hslot, &skb, 1347 remove_from_hanger); 1348 if (ret != 0) { 1349 brcmf_err("no packet in hanger slot: hslot=%d\n", hslot); 1350 return ret; 1351 } 1352 1353 skcb = brcmf_skbcb(skb); 1354 entry = skcb->mac; 1355 if (WARN_ON(!entry)) { 1356 brcmu_pkt_buf_free_skb(skb); 1357 return -EINVAL; 1358 } 1359 entry->transit_count--; 1360 if (entry->suppressed && entry->suppr_transit_count) 1361 entry->suppr_transit_count--; 1362 1363 brcmf_dbg(DATA, "%s flags %X htod %X\n", entry->name, skcb->if_flags, 1364 skcb->htod); 1365 1366 /* pick up the implicit credit from this packet */ 1367 fifo = brcmf_skb_htod_tag_get_field(skb, FIFO); 1368 if ((fws->fcmode == BRCMF_FWS_FCMODE_IMPLIED_CREDIT) || 1369 (brcmf_skb_if_flags_get_field(skb, REQ_CREDIT)) || 1370 (flags == BRCMF_FWS_TXSTATUS_HOST_TOSSED)) { 1371 brcmf_fws_return_credits(fws, fifo, 1); 1372 brcmf_fws_schedule_deq(fws); 1373 } 1374 brcmf_fws_macdesc_return_req_credit(skb); 1375 1376 if (!remove_from_hanger) 1377 ret = brcmf_fws_txstatus_suppressed(fws, fifo, skb, genbit); 1378 1379 if (remove_from_hanger || ret) 1380 brcmf_txfinalize(fws->drvr, skb, true); 1381 1382 return 0; 1383} 1384 1385static int brcmf_fws_fifocreditback_indicate(struct brcmf_fws_info *fws, 1386 u8 *data) 1387{ 1388 int i; 1389 1390 if (fws->fcmode != BRCMF_FWS_FCMODE_EXPLICIT_CREDIT) { 1391 brcmf_dbg(INFO, "ignored\n"); 1392 return BRCMF_FWS_RET_OK_NOSCHEDULE; 1393 } 1394 1395 brcmf_dbg(DATA, "enter: data %pM\n", data); 1396 brcmf_fws_lock(fws); 1397 for (i = 0; i < BRCMF_FWS_FIFO_COUNT; i++) 1398 brcmf_fws_return_credits(fws, i, data[i]); 1399 1400 brcmf_dbg(DATA, "map: credit %x delay %x\n", fws->fifo_credit_map, 1401 fws->fifo_delay_map); 1402 brcmf_fws_unlock(fws); 1403 return BRCMF_FWS_RET_OK_SCHEDULE; 1404} 1405 1406static int brcmf_fws_txstatus_indicate(struct brcmf_fws_info *fws, u8 *data) 1407{ 1408 __le32 status_le; 1409 u32 status; 1410 u32 hslot; 1411 u32 genbit; 1412 u8 flags; 1413 1414 fws->stats.txs_indicate++; 1415 memcpy(&status_le, data, sizeof(status_le)); 1416 status = le32_to_cpu(status_le); 1417 flags = brcmf_txstatus_get_field(status, FLAGS); 1418 hslot = brcmf_txstatus_get_field(status, HSLOT); 1419 genbit = brcmf_txstatus_get_field(status, GENERATION); 1420 1421 brcmf_fws_lock(fws); 1422 brcmf_fws_txs_process(fws, flags, hslot, genbit); 1423 brcmf_fws_unlock(fws); 1424 return BRCMF_FWS_RET_OK_NOSCHEDULE; 1425} 1426 1427static int brcmf_fws_dbg_seqnum_check(struct brcmf_fws_info *fws, u8 *data) 1428{ 1429 __le32 timestamp; 1430 1431 memcpy(×tamp, &data[2], sizeof(timestamp)); 1432 brcmf_dbg(CTL, "received: seq %d, timestamp %d\n", data[1], 1433 le32_to_cpu(timestamp)); 1434 return 0; 1435} 1436 1437static int brcmf_fws_notify_credit_map(struct brcmf_if *ifp, 1438 const struct brcmf_event_msg *e, 1439 void *data) 1440{ 1441 struct brcmf_fws_info *fws = ifp->drvr->fws; 1442 int i; 1443 u8 *credits = data; 1444 1445 if (e->datalen < BRCMF_FWS_FIFO_COUNT) { 1446 brcmf_err("event payload too small (%d)\n", e->datalen); 1447 return -EINVAL; 1448 } 1449 if (fws->creditmap_received) 1450 return 0; 1451 1452 fws->creditmap_received = true; 1453 1454 brcmf_dbg(TRACE, "enter: credits %pM\n", credits); 1455 brcmf_fws_lock(fws); 1456 for (i = 0; i < ARRAY_SIZE(fws->fifo_credit); i++) { 1457 if (*credits) 1458 fws->fifo_credit_map |= 1 << i; 1459 else 1460 fws->fifo_credit_map &= ~(1 << i); 1461 fws->fifo_credit[i] = *credits++; 1462 } 1463 brcmf_fws_schedule_deq(fws); 1464 brcmf_fws_unlock(fws); 1465 return 0; 1466} 1467 1468static int brcmf_fws_notify_bcmc_credit_support(struct brcmf_if *ifp, 1469 const struct brcmf_event_msg *e, 1470 void *data) 1471{ 1472 struct brcmf_fws_info *fws = ifp->drvr->fws; 1473 1474 brcmf_fws_lock(fws); 1475 if (fws) 1476 fws->bcmc_credit_check = true; 1477 brcmf_fws_unlock(fws); 1478 return 0; 1479} 1480 1481int brcmf_fws_hdrpull(struct brcmf_pub *drvr, int ifidx, s16 signal_len, 1482 struct sk_buff *skb) 1483{ 1484 struct brcmf_skb_reorder_data *rd; 1485 struct brcmf_fws_info *fws = drvr->fws; 1486 u8 *signal_data; 1487 s16 data_len; 1488 u8 type; 1489 u8 len; 1490 u8 *data; 1491 s32 status; 1492 s32 err; 1493 1494 brcmf_dbg(HDRS, "enter: ifidx %d, skblen %u, sig %d\n", 1495 ifidx, skb->len, signal_len); 1496 1497 WARN_ON(signal_len > skb->len); 1498 1499 if (!signal_len) 1500 return 0; 1501 /* if flow control disabled, skip to packet data and leave */ 1502 if (!fws->fw_signals) { 1503 skb_pull(skb, signal_len); 1504 return 0; 1505 } 1506 1507 fws->stats.header_pulls++; 1508 data_len = signal_len; 1509 signal_data = skb->data; 1510 1511 status = BRCMF_FWS_RET_OK_NOSCHEDULE; 1512 while (data_len > 0) { 1513 /* extract tlv info */ 1514 type = signal_data[0]; 1515 1516 /* FILLER type is actually not a TLV, but 1517 * a single byte that can be skipped. 1518 */ 1519 if (type == BRCMF_FWS_TYPE_FILLER) { 1520 signal_data += 1; 1521 data_len -= 1; 1522 continue; 1523 } 1524 len = signal_data[1]; 1525 data = signal_data + 2; 1526 1527 brcmf_dbg(HDRS, "tlv type=%s (%d), len=%d (%d)\n", 1528 brcmf_fws_get_tlv_name(type), type, len, 1529 brcmf_fws_get_tlv_len(fws, type)); 1530 1531 /* abort parsing when length invalid */ 1532 if (data_len < len + 2) 1533 break; 1534 1535 if (len < brcmf_fws_get_tlv_len(fws, type)) 1536 break; 1537 1538 err = BRCMF_FWS_RET_OK_NOSCHEDULE; 1539 switch (type) { 1540 case BRCMF_FWS_TYPE_COMP_TXSTATUS: 1541 break; 1542 case BRCMF_FWS_TYPE_HOST_REORDER_RXPKTS: 1543 rd = (struct brcmf_skb_reorder_data *)skb->cb; 1544 rd->reorder = data; 1545 break; 1546 case BRCMF_FWS_TYPE_MACDESC_ADD: 1547 case BRCMF_FWS_TYPE_MACDESC_DEL: 1548 brcmf_fws_macdesc_indicate(fws, type, data); 1549 break; 1550 case BRCMF_FWS_TYPE_MAC_OPEN: 1551 case BRCMF_FWS_TYPE_MAC_CLOSE: 1552 err = brcmf_fws_macdesc_state_indicate(fws, type, data); 1553 break; 1554 case BRCMF_FWS_TYPE_INTERFACE_OPEN: 1555 case BRCMF_FWS_TYPE_INTERFACE_CLOSE: 1556 err = brcmf_fws_interface_state_indicate(fws, type, 1557 data); 1558 break; 1559 case BRCMF_FWS_TYPE_MAC_REQUEST_CREDIT: 1560 case BRCMF_FWS_TYPE_MAC_REQUEST_PACKET: 1561 err = brcmf_fws_request_indicate(fws, type, data); 1562 break; 1563 case BRCMF_FWS_TYPE_TXSTATUS: 1564 brcmf_fws_txstatus_indicate(fws, data); 1565 break; 1566 case BRCMF_FWS_TYPE_FIFO_CREDITBACK: 1567 err = brcmf_fws_fifocreditback_indicate(fws, data); 1568 break; 1569 case BRCMF_FWS_TYPE_RSSI: 1570 brcmf_fws_rssi_indicate(fws, *data); 1571 break; 1572 case BRCMF_FWS_TYPE_TRANS_ID: 1573 brcmf_fws_dbg_seqnum_check(fws, data); 1574 break; 1575 case BRCMF_FWS_TYPE_PKTTAG: 1576 case BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP: 1577 default: 1578 fws->stats.tlv_invalid_type++; 1579 break; 1580 } 1581 if (err == BRCMF_FWS_RET_OK_SCHEDULE) 1582 status = BRCMF_FWS_RET_OK_SCHEDULE; 1583 signal_data += len + 2; 1584 data_len -= len + 2; 1585 } 1586 1587 if (data_len != 0) 1588 fws->stats.tlv_parse_failed++; 1589 1590 if (status == BRCMF_FWS_RET_OK_SCHEDULE) 1591 brcmf_fws_schedule_deq(fws); 1592 1593 /* signalling processing result does 1594 * not affect the actual ethernet packet. 1595 */ 1596 skb_pull(skb, signal_len); 1597 1598 /* this may be a signal-only packet 1599 */ 1600 if (skb->len == 0) 1601 fws->stats.header_only_pkt++; 1602 1603 return 0; 1604} 1605 1606static void brcmf_fws_precommit_skb(struct brcmf_fws_info *fws, int fifo, 1607 struct sk_buff *p) 1608{ 1609 struct brcmf_skbuff_cb *skcb = brcmf_skbcb(p); 1610 struct brcmf_fws_mac_descriptor *entry = skcb->mac; 1611 u8 flags; 1612 1613 brcmf_skb_if_flags_set_field(p, TRANSMIT, 1); 1614 brcmf_skb_htod_tag_set_field(p, GENERATION, entry->generation); 1615 flags = BRCMF_FWS_HTOD_FLAG_PKTFROMHOST; 1616 if (brcmf_skb_if_flags_get_field(p, REQUESTED)) { 1617 /* 1618 * Indicate that this packet is being sent in response to an 1619 * explicit request from the firmware side. 1620 */ 1621 flags |= BRCMF_FWS_HTOD_FLAG_PKT_REQUESTED; 1622 } 1623 brcmf_skb_htod_tag_set_field(p, FLAGS, flags); 1624 brcmf_fws_hdrpush(fws, p); 1625} 1626 1627static void brcmf_fws_rollback_toq(struct brcmf_fws_info *fws, 1628 struct sk_buff *skb, int fifo) 1629{ 1630 struct brcmf_fws_mac_descriptor *entry; 1631 struct sk_buff *pktout; 1632 int qidx, hslot; 1633 int rc = 0; 1634 1635 entry = brcmf_skbcb(skb)->mac; 1636 if (entry->occupied) { 1637 qidx = 2 * fifo; 1638 if (brcmf_skbcb(skb)->state == BRCMF_FWS_SKBSTATE_SUPPRESSED) 1639 qidx++; 1640 1641 pktout = brcmu_pktq_penq_head(&entry->psq, qidx, skb); 1642 if (pktout == NULL) { 1643 brcmf_err("%s queue %d full\n", entry->name, qidx); 1644 rc = -ENOSPC; 1645 } 1646 } else { 1647 brcmf_err("%s entry removed\n", entry->name); 1648 rc = -ENOENT; 1649 } 1650 1651 if (rc) { 1652 fws->stats.rollback_failed++; 1653 hslot = brcmf_skb_htod_tag_get_field(skb, HSLOT); 1654 brcmf_fws_txs_process(fws, BRCMF_FWS_TXSTATUS_HOST_TOSSED, 1655 hslot, 0); 1656 } else { 1657 fws->stats.rollback_success++; 1658 brcmf_fws_return_credits(fws, fifo, 1); 1659 brcmf_fws_macdesc_return_req_credit(skb); 1660 } 1661} 1662 1663static int brcmf_fws_borrow_credit(struct brcmf_fws_info *fws) 1664{ 1665 int lender_ac; 1666 1667 if (time_after(fws->borrow_defer_timestamp, jiffies)) { 1668 fws->fifo_credit_map &= ~(1 << BRCMF_FWS_FIFO_AC_BE); 1669 return -ENAVAIL; 1670 } 1671 1672 for (lender_ac = 0; lender_ac <= BRCMF_FWS_FIFO_AC_VO; lender_ac++) { 1673 if (fws->fifo_credit[lender_ac]) { 1674 fws->credits_borrowed[lender_ac]++; 1675 fws->fifo_credit[lender_ac]--; 1676 if (fws->fifo_credit[lender_ac] == 0) 1677 fws->fifo_credit_map &= ~(1 << lender_ac); 1678 fws->fifo_credit_map |= (1 << BRCMF_FWS_FIFO_AC_BE); 1679 brcmf_dbg(DATA, "borrow credit from: %d\n", lender_ac); 1680 return 0; 1681 } 1682 } 1683 fws->fifo_credit_map &= ~(1 << BRCMF_FWS_FIFO_AC_BE); 1684 return -ENAVAIL; 1685} 1686 1687static int brcmf_fws_commit_skb(struct brcmf_fws_info *fws, int fifo, 1688 struct sk_buff *skb) 1689{ 1690 struct brcmf_skbuff_cb *skcb = brcmf_skbcb(skb); 1691 struct brcmf_fws_mac_descriptor *entry; 1692 struct brcmf_bus *bus = fws->drvr->bus_if; 1693 int rc; 1694 u8 ifidx; 1695 1696 entry = skcb->mac; 1697 if (IS_ERR(entry)) 1698 return PTR_ERR(entry); 1699 1700 brcmf_fws_precommit_skb(fws, fifo, skb); 1701 entry->transit_count++; 1702 if (entry->suppressed) 1703 entry->suppr_transit_count++; 1704 brcmf_fws_unlock(fws); 1705 rc = brcmf_bus_txdata(bus, skb); 1706 brcmf_fws_lock(fws); 1707 brcmf_dbg(DATA, "%s flags %X htod %X bus_tx %d\n", entry->name, 1708 skcb->if_flags, skcb->htod, rc); 1709 if (rc < 0) { 1710 entry->transit_count--; 1711 if (entry->suppressed) 1712 entry->suppr_transit_count--; 1713 brcmf_proto_hdrpull(fws->drvr, false, &ifidx, skb); 1714 goto rollback; 1715 } 1716 1717 fws->stats.pkt2bus++; 1718 fws->stats.send_pkts[fifo]++; 1719 if (brcmf_skb_if_flags_get_field(skb, REQUESTED)) 1720 fws->stats.requested_sent[fifo]++; 1721 1722 return rc; 1723 1724rollback: 1725 brcmf_fws_rollback_toq(fws, skb, fifo); 1726 return rc; 1727} 1728 1729static int brcmf_fws_assign_htod(struct brcmf_fws_info *fws, struct sk_buff *p, 1730 int fifo) 1731{ 1732 struct brcmf_skbuff_cb *skcb = brcmf_skbcb(p); 1733 int rc, hslot; 1734 1735 hslot = brcmf_fws_hanger_get_free_slot(&fws->hanger); 1736 brcmf_skb_htod_tag_set_field(p, HSLOT, hslot); 1737 brcmf_skb_htod_tag_set_field(p, FREERUN, skcb->mac->seq[fifo]); 1738 brcmf_skb_htod_tag_set_field(p, FIFO, fifo); 1739 rc = brcmf_fws_hanger_pushpkt(&fws->hanger, p, hslot); 1740 if (!rc) 1741 skcb->mac->seq[fifo]++; 1742 else 1743 fws->stats.generic_error++; 1744 return rc; 1745} 1746 1747int brcmf_fws_process_skb(struct brcmf_if *ifp, struct sk_buff *skb) 1748{ 1749 struct brcmf_pub *drvr = ifp->drvr; 1750 struct brcmf_fws_info *fws = drvr->fws; 1751 struct brcmf_skbuff_cb *skcb = brcmf_skbcb(skb); 1752 struct ethhdr *eh = (struct ethhdr *)(skb->data); 1753 int fifo = BRCMF_FWS_FIFO_BCMC; 1754 bool multicast = is_multicast_ether_addr(eh->h_dest); 1755 bool pae = eh->h_proto == htons(ETH_P_PAE); 1756 1757 brcmf_dbg(DATA, "tx proto=0x%X\n", ntohs(eh->h_proto)); 1758 /* determine the priority */ 1759 if (!skb->priority) 1760 skb->priority = cfg80211_classify8021d(skb); 1761 1762 drvr->tx_multicast += !!multicast; 1763 if (pae) 1764 atomic_inc(&ifp->pend_8021x_cnt); 1765 1766 /* set control buffer information */ 1767 skcb->if_flags = 0; 1768 skcb->state = BRCMF_FWS_SKBSTATE_NEW; 1769 brcmf_skb_if_flags_set_field(skb, INDEX, ifp->ifidx); 1770 if (!multicast) 1771 fifo = brcmf_fws_prio2fifo[skb->priority]; 1772 1773 brcmf_fws_lock(fws); 1774 if (fifo != BRCMF_FWS_FIFO_AC_BE && fifo < BRCMF_FWS_FIFO_BCMC) 1775 fws->borrow_defer_timestamp = jiffies + 1776 BRCMF_FWS_BORROW_DEFER_PERIOD; 1777 1778 skcb->mac = brcmf_fws_macdesc_find(fws, ifp, eh->h_dest); 1779 brcmf_dbg(DATA, "%s mac %pM multi %d fifo %d\n", skcb->mac->name, 1780 eh->h_dest, multicast, fifo); 1781 if (!brcmf_fws_assign_htod(fws, skb, fifo)) { 1782 brcmf_fws_enq(fws, BRCMF_FWS_SKBSTATE_DELAYED, fifo, skb); 1783 brcmf_fws_schedule_deq(fws); 1784 } else { 1785 brcmf_err("drop skb: no hanger slot\n"); 1786 if (pae) { 1787 atomic_dec(&ifp->pend_8021x_cnt); 1788 if (waitqueue_active(&ifp->pend_8021x_wait)) 1789 wake_up(&ifp->pend_8021x_wait); 1790 } 1791 brcmu_pkt_buf_free_skb(skb); 1792 } 1793 brcmf_fws_unlock(fws); 1794 return 0; 1795} 1796 1797void brcmf_fws_reset_interface(struct brcmf_if *ifp) 1798{ 1799 struct brcmf_fws_mac_descriptor *entry = ifp->fws_desc; 1800 1801 brcmf_dbg(TRACE, "enter: idx=%d\n", ifp->bssidx); 1802 if (!entry) 1803 return; 1804 1805 brcmf_fws_macdesc_init(entry, ifp->mac_addr, ifp->ifidx); 1806} 1807 1808void brcmf_fws_add_interface(struct brcmf_if *ifp) 1809{ 1810 struct brcmf_fws_info *fws = ifp->drvr->fws; 1811 struct brcmf_fws_mac_descriptor *entry; 1812 1813 if (!ifp->ndev) 1814 return; 1815 1816 entry = &fws->desc.iface[ifp->ifidx]; 1817 ifp->fws_desc = entry; 1818 brcmf_fws_macdesc_init(entry, ifp->mac_addr, ifp->ifidx); 1819 brcmf_fws_macdesc_set_name(fws, entry); 1820 brcmu_pktq_init(&entry->psq, BRCMF_FWS_PSQ_PREC_COUNT, 1821 BRCMF_FWS_PSQ_LEN); 1822 brcmf_dbg(TRACE, "added %s\n", entry->name); 1823} 1824 1825void brcmf_fws_del_interface(struct brcmf_if *ifp) 1826{ 1827 struct brcmf_fws_mac_descriptor *entry = ifp->fws_desc; 1828 1829 if (!entry) 1830 return; 1831 1832 brcmf_fws_lock(ifp->drvr->fws); 1833 ifp->fws_desc = NULL; 1834 brcmf_dbg(TRACE, "deleting %s\n", entry->name); 1835 brcmf_fws_macdesc_deinit(entry); 1836 brcmf_fws_cleanup(ifp->drvr->fws, ifp->ifidx); 1837 brcmf_fws_unlock(ifp->drvr->fws); 1838} 1839 1840static void brcmf_fws_dequeue_worker(struct work_struct *worker) 1841{ 1842 struct brcmf_fws_info *fws; 1843 struct brcmf_pub *drvr; 1844 struct sk_buff *skb; 1845 int fifo; 1846 u32 hslot; 1847 u32 ifidx; 1848 int ret; 1849 1850 fws = container_of(worker, struct brcmf_fws_info, fws_dequeue_work); 1851 drvr = fws->drvr; 1852 1853 brcmf_fws_lock(fws); 1854 for (fifo = BRCMF_FWS_FIFO_BCMC; fifo >= 0 && !fws->bus_flow_blocked; 1855 fifo--) { 1856 if (!brcmf_fws_fc_active(fws)) { 1857 while ((skb = brcmf_fws_deq(fws, fifo)) != NULL) { 1858 hslot = brcmf_skb_htod_tag_get_field(skb, 1859 HSLOT); 1860 brcmf_fws_hanger_poppkt(&fws->hanger, hslot, 1861 &skb, true); 1862 ifidx = brcmf_skb_if_flags_get_field(skb, 1863 INDEX); 1864 brcmf_proto_hdrpush(drvr, ifidx, 0, skb); 1865 /* Use bus module to send data frame */ 1866 brcmf_fws_unlock(fws); 1867 ret = brcmf_bus_txdata(drvr->bus_if, skb); 1868 brcmf_fws_lock(fws); 1869 if (ret < 0) 1870 brcmf_txfinalize(drvr, skb, false); 1871 if (fws->bus_flow_blocked) 1872 break; 1873 } 1874 continue; 1875 } 1876 while ((fws->fifo_credit[fifo]) || ((!fws->bcmc_credit_check) && 1877 (fifo == BRCMF_FWS_FIFO_BCMC))) { 1878 skb = brcmf_fws_deq(fws, fifo); 1879 if (!skb) 1880 break; 1881 fws->fifo_credit[fifo]--; 1882 if (brcmf_fws_commit_skb(fws, fifo, skb)) 1883 break; 1884 if (fws->bus_flow_blocked) 1885 break; 1886 } 1887 if ((fifo == BRCMF_FWS_FIFO_AC_BE) && 1888 (fws->fifo_credit[fifo] == 0) && 1889 (!fws->bus_flow_blocked)) { 1890 while (brcmf_fws_borrow_credit(fws) == 0) { 1891 skb = brcmf_fws_deq(fws, fifo); 1892 if (!skb) { 1893 brcmf_fws_return_credits(fws, fifo, 1); 1894 break; 1895 } 1896 if (brcmf_fws_commit_skb(fws, fifo, skb)) 1897 break; 1898 if (fws->bus_flow_blocked) 1899 break; 1900 } 1901 } 1902 } 1903 brcmf_fws_unlock(fws); 1904} 1905 1906int brcmf_fws_init(struct brcmf_pub *drvr) 1907{ 1908 struct brcmf_fws_info *fws; 1909 u32 tlv = BRCMF_FWS_FLAGS_RSSI_SIGNALS; 1910 int rc; 1911 1912 drvr->fws = kzalloc(sizeof(*(drvr->fws)), GFP_KERNEL); 1913 if (!drvr->fws) { 1914 rc = -ENOMEM; 1915 goto fail; 1916 } 1917 1918 fws = drvr->fws; 1919 1920 spin_lock_init(&fws->spinlock); 1921 1922 /* set linkage back */ 1923 fws->drvr = drvr; 1924 fws->fcmode = fcmode; 1925 1926 fws->fws_wq = create_singlethread_workqueue("brcmf_fws_wq"); 1927 if (fws->fws_wq == NULL) { 1928 brcmf_err("workqueue creation failed\n"); 1929 rc = -EBADF; 1930 goto fail; 1931 } 1932 INIT_WORK(&fws->fws_dequeue_work, brcmf_fws_dequeue_worker); 1933 1934 /* enable firmware signalling if fcmode active */ 1935 if (fws->fcmode != BRCMF_FWS_FCMODE_NONE) 1936 tlv |= BRCMF_FWS_FLAGS_XONXOFF_SIGNALS | 1937 BRCMF_FWS_FLAGS_CREDIT_STATUS_SIGNALS | 1938 BRCMF_FWS_FLAGS_HOST_PROPTXSTATUS_ACTIVE | 1939 BRCMF_FWS_FLAGS_HOST_RXREORDER_ACTIVE; 1940 1941 rc = brcmf_fweh_register(drvr, BRCMF_E_FIFO_CREDIT_MAP, 1942 brcmf_fws_notify_credit_map); 1943 if (rc < 0) { 1944 brcmf_err("register credit map handler failed\n"); 1945 goto fail; 1946 } 1947 rc = brcmf_fweh_register(drvr, BRCMF_E_BCMC_CREDIT_SUPPORT, 1948 brcmf_fws_notify_bcmc_credit_support); 1949 if (rc < 0) { 1950 brcmf_err("register bcmc credit handler failed\n"); 1951 brcmf_fweh_unregister(drvr, BRCMF_E_FIFO_CREDIT_MAP); 1952 goto fail; 1953 } 1954 1955 /* Setting the iovar may fail if feature is unsupported 1956 * so leave the rc as is so driver initialization can 1957 * continue. Set mode back to none indicating not enabled. 1958 */ 1959 fws->fw_signals = true; 1960 if (brcmf_fil_iovar_int_set(drvr->iflist[0], "tlv", tlv)) { 1961 brcmf_err("failed to set bdcv2 tlv signaling\n"); 1962 fws->fcmode = BRCMF_FWS_FCMODE_NONE; 1963 fws->fw_signals = false; 1964 } 1965 1966 if (brcmf_fil_iovar_int_set(drvr->iflist[0], "ampdu_hostreorder", 1)) 1967 brcmf_dbg(INFO, "enabling AMPDU host-reorder failed\n"); 1968 1969 brcmf_fws_hanger_init(&fws->hanger); 1970 brcmf_fws_macdesc_init(&fws->desc.other, NULL, 0); 1971 brcmf_fws_macdesc_set_name(fws, &fws->desc.other); 1972 brcmu_pktq_init(&fws->desc.other.psq, BRCMF_FWS_PSQ_PREC_COUNT, 1973 BRCMF_FWS_PSQ_LEN); 1974 1975 /* create debugfs file for statistics */ 1976 brcmf_debugfs_create_fws_stats(drvr, &fws->stats); 1977 1978 brcmf_dbg(INFO, "%s bdcv2 tlv signaling [%x]\n", 1979 fws->fw_signals ? "enabled" : "disabled", tlv); 1980 return 0; 1981 1982fail: 1983 brcmf_fws_deinit(drvr); 1984 return rc; 1985} 1986 1987void brcmf_fws_deinit(struct brcmf_pub *drvr) 1988{ 1989 struct brcmf_fws_info *fws = drvr->fws; 1990 1991 if (!fws) 1992 return; 1993 1994 if (drvr->fws->fws_wq) 1995 destroy_workqueue(drvr->fws->fws_wq); 1996 1997 /* cleanup */ 1998 brcmf_fws_lock(fws); 1999 brcmf_fws_cleanup(fws, -1); 2000 drvr->fws = NULL; 2001 brcmf_fws_unlock(fws); 2002 2003 /* free top structure */ 2004 kfree(fws); 2005} 2006 2007bool brcmf_fws_fc_active(struct brcmf_fws_info *fws) 2008{ 2009 if (!fws->creditmap_received) 2010 return false; 2011 2012 return fws->fcmode != BRCMF_FWS_FCMODE_NONE; 2013} 2014 2015void brcmf_fws_bustxfail(struct brcmf_fws_info *fws, struct sk_buff *skb) 2016{ 2017 u32 hslot; 2018 2019 if (brcmf_skbcb(skb)->state == BRCMF_FWS_SKBSTATE_TIM) { 2020 brcmu_pkt_buf_free_skb(skb); 2021 return; 2022 } 2023 brcmf_fws_lock(fws); 2024 hslot = brcmf_skb_htod_tag_get_field(skb, HSLOT); 2025 brcmf_fws_txs_process(fws, BRCMF_FWS_TXSTATUS_HOST_TOSSED, hslot, 0); 2026 brcmf_fws_unlock(fws); 2027} 2028 2029void brcmf_fws_bus_blocked(struct brcmf_pub *drvr, bool flow_blocked) 2030{ 2031 struct brcmf_fws_info *fws = drvr->fws; 2032 2033 fws->bus_flow_blocked = flow_blocked; 2034 if (!flow_blocked) 2035 brcmf_fws_schedule_deq(fws); 2036 else 2037 fws->stats.bus_flow_block++; 2038} 2039