fwsignal.c revision 3f4f910fdc3b9eff06a007ab28762cd3d6720d51
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 spinlock_t spinlock; 426 ulong flags; 427 struct brcmf_fws_stats stats; 428 struct brcmf_fws_hanger hanger; 429 enum brcmf_fws_fcmode fcmode; 430 bool fw_signals; 431 bool bcmc_credit_check; 432 struct brcmf_fws_macdesc_table desc; 433 struct workqueue_struct *fws_wq; 434 struct work_struct fws_dequeue_work; 435 u32 fifo_enqpkt[BRCMF_FWS_FIFO_COUNT]; 436 int fifo_credit[BRCMF_FWS_FIFO_COUNT]; 437 int credits_borrowed[BRCMF_FWS_FIFO_AC_VO + 1]; 438 int deq_node_pos[BRCMF_FWS_FIFO_COUNT]; 439 u32 fifo_credit_map; 440 u32 fifo_delay_map; 441 unsigned long borrow_defer_timestamp; 442 bool bus_flow_blocked; 443 bool creditmap_received; 444}; 445 446/* 447 * brcmf_fws_prio2fifo - mapping from 802.1d priority to firmware fifo index. 448 */ 449static const int brcmf_fws_prio2fifo[] = { 450 BRCMF_FWS_FIFO_AC_BE, 451 BRCMF_FWS_FIFO_AC_BK, 452 BRCMF_FWS_FIFO_AC_BK, 453 BRCMF_FWS_FIFO_AC_BE, 454 BRCMF_FWS_FIFO_AC_VI, 455 BRCMF_FWS_FIFO_AC_VI, 456 BRCMF_FWS_FIFO_AC_VO, 457 BRCMF_FWS_FIFO_AC_VO 458}; 459 460static int fcmode; 461module_param(fcmode, int, S_IRUSR); 462MODULE_PARM_DESC(fcmode, "mode of firmware signalled flow control"); 463 464#define BRCMF_FWS_TLV_DEF(name, id, len) \ 465 case BRCMF_FWS_TYPE_ ## name: \ 466 return len; 467 468/** 469 * brcmf_fws_get_tlv_len() - returns defined length for given tlv id. 470 * 471 * @fws: firmware-signalling information. 472 * @id: identifier of the TLV. 473 * 474 * Return: the specified length for the given TLV; Otherwise -EINVAL. 475 */ 476static int brcmf_fws_get_tlv_len(struct brcmf_fws_info *fws, 477 enum brcmf_fws_tlv_type id) 478{ 479 switch (id) { 480 BRCMF_FWS_TLV_DEFLIST 481 default: 482 fws->stats.tlv_invalid_type++; 483 break; 484 } 485 return -EINVAL; 486} 487#undef BRCMF_FWS_TLV_DEF 488 489static void brcmf_fws_lock(struct brcmf_fws_info *fws) 490 __acquires(&fws->spinlock) 491{ 492 spin_lock_irqsave(&fws->spinlock, fws->flags); 493} 494 495static void brcmf_fws_unlock(struct brcmf_fws_info *fws) 496 __releases(&fws->spinlock) 497{ 498 spin_unlock_irqrestore(&fws->spinlock, fws->flags); 499} 500 501static bool brcmf_fws_ifidx_match(struct sk_buff *skb, void *arg) 502{ 503 u32 ifidx = brcmf_skb_if_flags_get_field(skb, INDEX); 504 return ifidx == *(int *)arg; 505} 506 507static void brcmf_fws_psq_flush(struct brcmf_fws_info *fws, struct pktq *q, 508 int ifidx) 509{ 510 bool (*matchfn)(struct sk_buff *, void *) = NULL; 511 struct sk_buff *skb; 512 int prec; 513 514 if (ifidx != -1) 515 matchfn = brcmf_fws_ifidx_match; 516 for (prec = 0; prec < q->num_prec; prec++) { 517 skb = brcmu_pktq_pdeq_match(q, prec, matchfn, &ifidx); 518 while (skb) { 519 brcmu_pkt_buf_free_skb(skb); 520 skb = brcmu_pktq_pdeq_match(q, prec, matchfn, &ifidx); 521 } 522 } 523} 524 525static void brcmf_fws_hanger_init(struct brcmf_fws_hanger *hanger) 526{ 527 int i; 528 529 memset(hanger, 0, sizeof(*hanger)); 530 for (i = 0; i < ARRAY_SIZE(hanger->items); i++) 531 hanger->items[i].state = BRCMF_FWS_HANGER_ITEM_STATE_FREE; 532} 533 534static u32 brcmf_fws_hanger_get_free_slot(struct brcmf_fws_hanger *h) 535{ 536 u32 i; 537 538 i = (h->slot_pos + 1) % BRCMF_FWS_HANGER_MAXITEMS; 539 540 while (i != h->slot_pos) { 541 if (h->items[i].state == BRCMF_FWS_HANGER_ITEM_STATE_FREE) { 542 h->slot_pos = i; 543 goto done; 544 } 545 i++; 546 if (i == BRCMF_FWS_HANGER_MAXITEMS) 547 i = 0; 548 } 549 brcmf_err("all slots occupied\n"); 550 h->failed_slotfind++; 551 i = BRCMF_FWS_HANGER_MAXITEMS; 552done: 553 return i; 554} 555 556static int brcmf_fws_hanger_pushpkt(struct brcmf_fws_hanger *h, 557 struct sk_buff *pkt, u32 slot_id) 558{ 559 if (slot_id >= BRCMF_FWS_HANGER_MAXITEMS) 560 return -ENOENT; 561 562 if (h->items[slot_id].state != BRCMF_FWS_HANGER_ITEM_STATE_FREE) { 563 brcmf_err("slot is not free\n"); 564 h->failed_to_push++; 565 return -EINVAL; 566 } 567 568 h->items[slot_id].state = BRCMF_FWS_HANGER_ITEM_STATE_INUSE; 569 h->items[slot_id].pkt = pkt; 570 h->pushed++; 571 return 0; 572} 573 574static int brcmf_fws_hanger_poppkt(struct brcmf_fws_hanger *h, 575 u32 slot_id, struct sk_buff **pktout, 576 bool remove_item) 577{ 578 if (slot_id >= BRCMF_FWS_HANGER_MAXITEMS) 579 return -ENOENT; 580 581 if (h->items[slot_id].state == BRCMF_FWS_HANGER_ITEM_STATE_FREE) { 582 brcmf_err("entry not in use\n"); 583 h->failed_to_pop++; 584 return -EINVAL; 585 } 586 587 *pktout = h->items[slot_id].pkt; 588 if (remove_item) { 589 h->items[slot_id].state = BRCMF_FWS_HANGER_ITEM_STATE_FREE; 590 h->items[slot_id].pkt = NULL; 591 h->popped++; 592 } 593 return 0; 594} 595 596static int brcmf_fws_hanger_mark_suppressed(struct brcmf_fws_hanger *h, 597 u32 slot_id) 598{ 599 if (slot_id >= BRCMF_FWS_HANGER_MAXITEMS) 600 return -ENOENT; 601 602 if (h->items[slot_id].state == BRCMF_FWS_HANGER_ITEM_STATE_FREE) { 603 brcmf_err("entry not in use\n"); 604 return -EINVAL; 605 } 606 607 h->items[slot_id].state = BRCMF_FWS_HANGER_ITEM_STATE_INUSE_SUPPRESSED; 608 return 0; 609} 610 611static void brcmf_fws_hanger_cleanup(struct brcmf_fws_info *fws, 612 bool (*fn)(struct sk_buff *, void *), 613 int ifidx) 614{ 615 struct brcmf_fws_hanger *h = &fws->hanger; 616 struct sk_buff *skb; 617 int i; 618 enum brcmf_fws_hanger_item_state s; 619 620 for (i = 0; i < ARRAY_SIZE(h->items); i++) { 621 s = h->items[i].state; 622 if (s == BRCMF_FWS_HANGER_ITEM_STATE_INUSE || 623 s == BRCMF_FWS_HANGER_ITEM_STATE_INUSE_SUPPRESSED) { 624 skb = h->items[i].pkt; 625 if (fn == NULL || fn(skb, &ifidx)) { 626 /* suppress packets freed from psq */ 627 if (s == BRCMF_FWS_HANGER_ITEM_STATE_INUSE) 628 brcmu_pkt_buf_free_skb(skb); 629 h->items[i].state = 630 BRCMF_FWS_HANGER_ITEM_STATE_FREE; 631 } 632 } 633 } 634} 635 636static void brcmf_fws_macdesc_set_name(struct brcmf_fws_info *fws, 637 struct brcmf_fws_mac_descriptor *desc) 638{ 639 if (desc == &fws->desc.other) 640 strlcpy(desc->name, "MAC-OTHER", sizeof(desc->name)); 641 else if (desc->mac_handle) 642 scnprintf(desc->name, sizeof(desc->name), "MAC-%d:%d", 643 desc->mac_handle, desc->interface_id); 644 else 645 scnprintf(desc->name, sizeof(desc->name), "MACIF:%d", 646 desc->interface_id); 647} 648 649static void brcmf_fws_macdesc_init(struct brcmf_fws_mac_descriptor *desc, 650 u8 *addr, u8 ifidx) 651{ 652 brcmf_dbg(TRACE, 653 "enter: desc %p ea=%pM, ifidx=%u\n", desc, addr, ifidx); 654 desc->occupied = 1; 655 desc->state = BRCMF_FWS_STATE_OPEN; 656 desc->requested_credit = 0; 657 desc->requested_packet = 0; 658 /* depending on use may need ifp->bssidx instead */ 659 desc->interface_id = ifidx; 660 desc->ac_bitmap = 0xff; /* update this when handling APSD */ 661 if (addr) 662 memcpy(&desc->ea[0], addr, ETH_ALEN); 663} 664 665static 666void brcmf_fws_macdesc_deinit(struct brcmf_fws_mac_descriptor *desc) 667{ 668 brcmf_dbg(TRACE, 669 "enter: ea=%pM, ifidx=%u\n", desc->ea, desc->interface_id); 670 desc->occupied = 0; 671 desc->state = BRCMF_FWS_STATE_CLOSE; 672 desc->requested_credit = 0; 673 desc->requested_packet = 0; 674} 675 676static struct brcmf_fws_mac_descriptor * 677brcmf_fws_macdesc_lookup(struct brcmf_fws_info *fws, u8 *ea) 678{ 679 struct brcmf_fws_mac_descriptor *entry; 680 int i; 681 682 if (ea == NULL) 683 return ERR_PTR(-EINVAL); 684 685 entry = &fws->desc.nodes[0]; 686 for (i = 0; i < ARRAY_SIZE(fws->desc.nodes); i++) { 687 if (entry->occupied && !memcmp(entry->ea, ea, ETH_ALEN)) 688 return entry; 689 entry++; 690 } 691 692 return ERR_PTR(-ENOENT); 693} 694 695static struct brcmf_fws_mac_descriptor* 696brcmf_fws_macdesc_find(struct brcmf_fws_info *fws, struct brcmf_if *ifp, u8 *da) 697{ 698 struct brcmf_fws_mac_descriptor *entry = &fws->desc.other; 699 bool multicast; 700 701 multicast = is_multicast_ether_addr(da); 702 703 /* Multicast destination, STA and P2P clients get the interface entry. 704 * STA/GC gets the Mac Entry for TDLS destinations, TDLS destinations 705 * have their own entry. 706 */ 707 if (multicast && ifp->fws_desc) { 708 entry = ifp->fws_desc; 709 goto done; 710 } 711 712 entry = brcmf_fws_macdesc_lookup(fws, da); 713 if (IS_ERR(entry)) 714 entry = ifp->fws_desc; 715 716done: 717 return entry; 718} 719 720static bool brcmf_fws_macdesc_closed(struct brcmf_fws_info *fws, 721 struct brcmf_fws_mac_descriptor *entry, 722 int fifo) 723{ 724 struct brcmf_fws_mac_descriptor *if_entry; 725 bool closed; 726 727 /* for unique destination entries the related interface 728 * may be closed. 729 */ 730 if (entry->mac_handle) { 731 if_entry = &fws->desc.iface[entry->interface_id]; 732 if (if_entry->state == BRCMF_FWS_STATE_CLOSE) 733 return true; 734 } 735 /* an entry is closed when the state is closed and 736 * the firmware did not request anything. 737 */ 738 closed = entry->state == BRCMF_FWS_STATE_CLOSE && 739 !entry->requested_credit && !entry->requested_packet; 740 741 /* Or firmware does not allow traffic for given fifo */ 742 return closed || !(entry->ac_bitmap & BIT(fifo)); 743} 744 745static void brcmf_fws_macdesc_cleanup(struct brcmf_fws_info *fws, 746 struct brcmf_fws_mac_descriptor *entry, 747 int ifidx) 748{ 749 if (entry->occupied && (ifidx == -1 || ifidx == entry->interface_id)) { 750 brcmf_fws_psq_flush(fws, &entry->psq, ifidx); 751 entry->occupied = !!(entry->psq.len); 752 } 753} 754 755static void brcmf_fws_bus_txq_cleanup(struct brcmf_fws_info *fws, 756 bool (*fn)(struct sk_buff *, void *), 757 int ifidx) 758{ 759 struct brcmf_fws_hanger_item *hi; 760 struct pktq *txq; 761 struct sk_buff *skb; 762 int prec; 763 u32 hslot; 764 765 txq = brcmf_bus_gettxq(fws->drvr->bus_if); 766 if (IS_ERR(txq)) { 767 brcmf_dbg(TRACE, "no txq to clean up\n"); 768 return; 769 } 770 771 for (prec = 0; prec < txq->num_prec; prec++) { 772 skb = brcmu_pktq_pdeq_match(txq, prec, fn, &ifidx); 773 while (skb) { 774 hslot = brcmf_skb_htod_tag_get_field(skb, HSLOT); 775 hi = &fws->hanger.items[hslot]; 776 WARN_ON(skb != hi->pkt); 777 hi->state = BRCMF_FWS_HANGER_ITEM_STATE_FREE; 778 brcmu_pkt_buf_free_skb(skb); 779 skb = brcmu_pktq_pdeq_match(txq, prec, fn, &ifidx); 780 } 781 } 782} 783 784static void brcmf_fws_cleanup(struct brcmf_fws_info *fws, int ifidx) 785{ 786 int i; 787 struct brcmf_fws_mac_descriptor *table; 788 bool (*matchfn)(struct sk_buff *, void *) = NULL; 789 790 if (fws == NULL) 791 return; 792 793 if (ifidx != -1) 794 matchfn = brcmf_fws_ifidx_match; 795 796 /* cleanup individual nodes */ 797 table = &fws->desc.nodes[0]; 798 for (i = 0; i < ARRAY_SIZE(fws->desc.nodes); i++) 799 brcmf_fws_macdesc_cleanup(fws, &table[i], ifidx); 800 801 brcmf_fws_macdesc_cleanup(fws, &fws->desc.other, ifidx); 802 brcmf_fws_bus_txq_cleanup(fws, matchfn, ifidx); 803 brcmf_fws_hanger_cleanup(fws, matchfn, ifidx); 804} 805 806static int brcmf_fws_hdrpush(struct brcmf_fws_info *fws, struct sk_buff *skb) 807{ 808 struct brcmf_fws_mac_descriptor *entry = brcmf_skbcb(skb)->mac; 809 u8 *wlh; 810 u16 data_offset = 0; 811 u8 fillers; 812 __le32 pkttag = cpu_to_le32(brcmf_skbcb(skb)->htod); 813 814 brcmf_dbg(TRACE, "enter: %s, idx=%d pkttag=0x%08X, hslot=%d\n", 815 entry->name, brcmf_skb_if_flags_get_field(skb, INDEX), 816 le32_to_cpu(pkttag), (le32_to_cpu(pkttag) >> 8) & 0xffff); 817 if (entry->send_tim_signal) 818 data_offset += 2 + BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP_LEN; 819 820 /* +2 is for Type[1] and Len[1] in TLV, plus TIM signal */ 821 data_offset += 2 + BRCMF_FWS_TYPE_PKTTAG_LEN; 822 fillers = round_up(data_offset, 4) - data_offset; 823 data_offset += fillers; 824 825 skb_push(skb, data_offset); 826 wlh = skb->data; 827 828 wlh[0] = BRCMF_FWS_TYPE_PKTTAG; 829 wlh[1] = BRCMF_FWS_TYPE_PKTTAG_LEN; 830 memcpy(&wlh[2], &pkttag, sizeof(pkttag)); 831 wlh += BRCMF_FWS_TYPE_PKTTAG_LEN + 2; 832 833 if (entry->send_tim_signal) { 834 entry->send_tim_signal = 0; 835 wlh[0] = BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP; 836 wlh[1] = BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP_LEN; 837 wlh[2] = entry->mac_handle; 838 wlh[3] = entry->traffic_pending_bmp; 839 brcmf_dbg(TRACE, "adding TIM info: handle %d bmp 0x%X\n", 840 entry->mac_handle, entry->traffic_pending_bmp); 841 wlh += BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP_LEN + 2; 842 entry->traffic_lastreported_bmp = entry->traffic_pending_bmp; 843 } 844 if (fillers) 845 memset(wlh, BRCMF_FWS_TYPE_FILLER, fillers); 846 847 brcmf_proto_hdrpush(fws->drvr, brcmf_skb_if_flags_get_field(skb, INDEX), 848 data_offset >> 2, skb); 849 return 0; 850} 851 852static bool brcmf_fws_tim_update(struct brcmf_fws_info *fws, 853 struct brcmf_fws_mac_descriptor *entry, 854 int fifo, bool send_immediately) 855{ 856 struct sk_buff *skb; 857 struct brcmf_bus *bus; 858 struct brcmf_skbuff_cb *skcb; 859 s32 err; 860 u32 len; 861 862 /* check delayedQ and suppressQ in one call using bitmap */ 863 if (brcmu_pktq_mlen(&entry->psq, 3 << (fifo * 2)) == 0) 864 entry->traffic_pending_bmp &= ~NBITVAL(fifo); 865 else 866 entry->traffic_pending_bmp |= NBITVAL(fifo); 867 868 entry->send_tim_signal = false; 869 if (entry->traffic_lastreported_bmp != entry->traffic_pending_bmp) 870 entry->send_tim_signal = true; 871 if (send_immediately && entry->send_tim_signal && 872 entry->state == BRCMF_FWS_STATE_CLOSE) { 873 /* create a dummy packet and sent that. The traffic */ 874 /* bitmap info will automatically be attached to that packet */ 875 len = BRCMF_FWS_TYPE_PKTTAG_LEN + 2 + 876 BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP_LEN + 2 + 877 4 + fws->drvr->hdrlen; 878 skb = brcmu_pkt_buf_get_skb(len); 879 if (skb == NULL) 880 return false; 881 skb_pull(skb, len); 882 skcb = brcmf_skbcb(skb); 883 skcb->mac = entry; 884 skcb->state = BRCMF_FWS_SKBSTATE_TIM; 885 bus = fws->drvr->bus_if; 886 err = brcmf_fws_hdrpush(fws, skb); 887 if (err == 0) { 888 brcmf_fws_unlock(fws); 889 err = brcmf_bus_txdata(bus, skb); 890 brcmf_fws_lock(fws); 891 } 892 if (err) 893 brcmu_pkt_buf_free_skb(skb); 894 return true; 895 } 896 return false; 897} 898 899static void 900brcmf_fws_flow_control_check(struct brcmf_fws_info *fws, struct pktq *pq, 901 u8 if_id) 902{ 903 struct brcmf_if *ifp = fws->drvr->iflist[!if_id ? 0 : if_id + 1]; 904 905 if (WARN_ON(!ifp)) 906 return; 907 908 if ((ifp->netif_stop & BRCMF_NETIF_STOP_REASON_FWS_FC) && 909 pq->len <= BRCMF_FWS_FLOWCONTROL_LOWATER) 910 brcmf_txflowblock_if(ifp, 911 BRCMF_NETIF_STOP_REASON_FWS_FC, false); 912 if (!(ifp->netif_stop & BRCMF_NETIF_STOP_REASON_FWS_FC) && 913 pq->len >= BRCMF_FWS_FLOWCONTROL_HIWATER) { 914 fws->stats.fws_flow_block++; 915 brcmf_txflowblock_if(ifp, BRCMF_NETIF_STOP_REASON_FWS_FC, true); 916 } 917 return; 918} 919 920static int brcmf_fws_rssi_indicate(struct brcmf_fws_info *fws, s8 rssi) 921{ 922 brcmf_dbg(CTL, "rssi %d\n", rssi); 923 return 0; 924} 925 926static 927int brcmf_fws_macdesc_indicate(struct brcmf_fws_info *fws, u8 type, u8 *data) 928{ 929 struct brcmf_fws_mac_descriptor *entry, *existing; 930 u8 mac_handle; 931 u8 ifidx; 932 u8 *addr; 933 934 mac_handle = *data++; 935 ifidx = *data++; 936 addr = data; 937 938 entry = &fws->desc.nodes[mac_handle & 0x1F]; 939 if (type == BRCMF_FWS_TYPE_MACDESC_DEL) { 940 if (entry->occupied) { 941 brcmf_dbg(TRACE, "deleting %s mac %pM\n", 942 entry->name, addr); 943 brcmf_fws_lock(fws); 944 brcmf_fws_macdesc_cleanup(fws, entry, -1); 945 brcmf_fws_macdesc_deinit(entry); 946 brcmf_fws_unlock(fws); 947 } else 948 fws->stats.mac_update_failed++; 949 return 0; 950 } 951 952 existing = brcmf_fws_macdesc_lookup(fws, addr); 953 if (IS_ERR(existing)) { 954 if (!entry->occupied) { 955 brcmf_fws_lock(fws); 956 entry->mac_handle = mac_handle; 957 brcmf_fws_macdesc_init(entry, addr, ifidx); 958 brcmf_fws_macdesc_set_name(fws, entry); 959 brcmu_pktq_init(&entry->psq, BRCMF_FWS_PSQ_PREC_COUNT, 960 BRCMF_FWS_PSQ_LEN); 961 brcmf_fws_unlock(fws); 962 brcmf_dbg(TRACE, "add %s mac %pM\n", entry->name, addr); 963 } else { 964 fws->stats.mac_update_failed++; 965 } 966 } else { 967 if (entry != existing) { 968 brcmf_dbg(TRACE, "copy mac %s\n", existing->name); 969 brcmf_fws_lock(fws); 970 memcpy(entry, existing, 971 offsetof(struct brcmf_fws_mac_descriptor, psq)); 972 entry->mac_handle = mac_handle; 973 brcmf_fws_macdesc_deinit(existing); 974 brcmf_fws_macdesc_set_name(fws, entry); 975 brcmf_fws_unlock(fws); 976 brcmf_dbg(TRACE, "relocate %s mac %pM\n", entry->name, 977 addr); 978 } else { 979 brcmf_dbg(TRACE, "use existing\n"); 980 WARN_ON(entry->mac_handle != mac_handle); 981 /* TODO: what should we do here: continue, reinit, .. */ 982 } 983 } 984 return 0; 985} 986 987static int brcmf_fws_macdesc_state_indicate(struct brcmf_fws_info *fws, 988 u8 type, u8 *data) 989{ 990 struct brcmf_fws_mac_descriptor *entry; 991 u8 mac_handle; 992 int ret; 993 994 mac_handle = data[0]; 995 entry = &fws->desc.nodes[mac_handle & 0x1F]; 996 if (!entry->occupied) { 997 fws->stats.mac_ps_update_failed++; 998 return -ESRCH; 999 } 1000 brcmf_fws_lock(fws); 1001 /* a state update should wipe old credits */ 1002 entry->requested_credit = 0; 1003 entry->requested_packet = 0; 1004 if (type == BRCMF_FWS_TYPE_MAC_OPEN) { 1005 entry->state = BRCMF_FWS_STATE_OPEN; 1006 ret = BRCMF_FWS_RET_OK_SCHEDULE; 1007 } else { 1008 entry->state = BRCMF_FWS_STATE_CLOSE; 1009 brcmf_fws_tim_update(fws, entry, BRCMF_FWS_FIFO_AC_BK, false); 1010 brcmf_fws_tim_update(fws, entry, BRCMF_FWS_FIFO_AC_BE, false); 1011 brcmf_fws_tim_update(fws, entry, BRCMF_FWS_FIFO_AC_VI, false); 1012 brcmf_fws_tim_update(fws, entry, BRCMF_FWS_FIFO_AC_VO, true); 1013 ret = BRCMF_FWS_RET_OK_NOSCHEDULE; 1014 } 1015 brcmf_fws_unlock(fws); 1016 return ret; 1017} 1018 1019static int brcmf_fws_interface_state_indicate(struct brcmf_fws_info *fws, 1020 u8 type, u8 *data) 1021{ 1022 struct brcmf_fws_mac_descriptor *entry; 1023 u8 ifidx; 1024 int ret; 1025 1026 ifidx = data[0]; 1027 1028 if (ifidx >= BRCMF_MAX_IFS) { 1029 ret = -ERANGE; 1030 goto fail; 1031 } 1032 1033 entry = &fws->desc.iface[ifidx]; 1034 if (!entry->occupied) { 1035 ret = -ESRCH; 1036 goto fail; 1037 } 1038 1039 brcmf_dbg(TRACE, "%s (%d): %s\n", brcmf_fws_get_tlv_name(type), type, 1040 entry->name); 1041 brcmf_fws_lock(fws); 1042 switch (type) { 1043 case BRCMF_FWS_TYPE_INTERFACE_OPEN: 1044 entry->state = BRCMF_FWS_STATE_OPEN; 1045 ret = BRCMF_FWS_RET_OK_SCHEDULE; 1046 break; 1047 case BRCMF_FWS_TYPE_INTERFACE_CLOSE: 1048 entry->state = BRCMF_FWS_STATE_CLOSE; 1049 ret = BRCMF_FWS_RET_OK_NOSCHEDULE; 1050 break; 1051 default: 1052 ret = -EINVAL; 1053 brcmf_fws_unlock(fws); 1054 goto fail; 1055 } 1056 brcmf_fws_unlock(fws); 1057 return ret; 1058 1059fail: 1060 fws->stats.if_update_failed++; 1061 return ret; 1062} 1063 1064static int brcmf_fws_request_indicate(struct brcmf_fws_info *fws, u8 type, 1065 u8 *data) 1066{ 1067 struct brcmf_fws_mac_descriptor *entry; 1068 1069 entry = &fws->desc.nodes[data[1] & 0x1F]; 1070 if (!entry->occupied) { 1071 if (type == BRCMF_FWS_TYPE_MAC_REQUEST_CREDIT) 1072 fws->stats.credit_request_failed++; 1073 else 1074 fws->stats.packet_request_failed++; 1075 return -ESRCH; 1076 } 1077 1078 brcmf_dbg(TRACE, "%s (%d): %s cnt %d bmp %d\n", 1079 brcmf_fws_get_tlv_name(type), type, entry->name, 1080 data[0], data[2]); 1081 brcmf_fws_lock(fws); 1082 if (type == BRCMF_FWS_TYPE_MAC_REQUEST_CREDIT) 1083 entry->requested_credit = data[0]; 1084 else 1085 entry->requested_packet = data[0]; 1086 1087 entry->ac_bitmap = data[2]; 1088 brcmf_fws_unlock(fws); 1089 return BRCMF_FWS_RET_OK_SCHEDULE; 1090} 1091 1092static void 1093brcmf_fws_macdesc_use_req_credit(struct brcmf_fws_mac_descriptor *entry, 1094 struct sk_buff *skb) 1095{ 1096 if (entry->requested_credit > 0) { 1097 entry->requested_credit--; 1098 brcmf_skb_if_flags_set_field(skb, REQUESTED, 1); 1099 brcmf_skb_if_flags_set_field(skb, REQ_CREDIT, 1); 1100 if (entry->state != BRCMF_FWS_STATE_CLOSE) 1101 brcmf_err("requested credit set while mac not closed!\n"); 1102 } else if (entry->requested_packet > 0) { 1103 entry->requested_packet--; 1104 brcmf_skb_if_flags_set_field(skb, REQUESTED, 1); 1105 brcmf_skb_if_flags_set_field(skb, REQ_CREDIT, 0); 1106 if (entry->state != BRCMF_FWS_STATE_CLOSE) 1107 brcmf_err("requested packet set while mac not closed!\n"); 1108 } else { 1109 brcmf_skb_if_flags_set_field(skb, REQUESTED, 0); 1110 brcmf_skb_if_flags_set_field(skb, REQ_CREDIT, 0); 1111 } 1112} 1113 1114static void brcmf_fws_macdesc_return_req_credit(struct sk_buff *skb) 1115{ 1116 struct brcmf_fws_mac_descriptor *entry = brcmf_skbcb(skb)->mac; 1117 1118 if ((brcmf_skb_if_flags_get_field(skb, REQ_CREDIT)) && 1119 (entry->state == BRCMF_FWS_STATE_CLOSE)) 1120 entry->requested_credit++; 1121} 1122 1123static void brcmf_fws_return_credits(struct brcmf_fws_info *fws, 1124 u8 fifo, u8 credits) 1125{ 1126 int lender_ac; 1127 int *borrowed; 1128 int *fifo_credit; 1129 1130 if (!credits) 1131 return; 1132 1133 fws->fifo_credit_map |= 1 << fifo; 1134 1135 if ((fifo == BRCMF_FWS_FIFO_AC_BE) && 1136 (fws->credits_borrowed[0])) { 1137 for (lender_ac = BRCMF_FWS_FIFO_AC_VO; lender_ac >= 0; 1138 lender_ac--) { 1139 borrowed = &fws->credits_borrowed[lender_ac]; 1140 if (*borrowed) { 1141 fws->fifo_credit_map |= (1 << lender_ac); 1142 fifo_credit = &fws->fifo_credit[lender_ac]; 1143 if (*borrowed >= credits) { 1144 *borrowed -= credits; 1145 *fifo_credit += credits; 1146 return; 1147 } else { 1148 credits -= *borrowed; 1149 *fifo_credit += *borrowed; 1150 *borrowed = 0; 1151 } 1152 } 1153 } 1154 } 1155 1156 fws->fifo_credit[fifo] += credits; 1157} 1158 1159static void brcmf_fws_schedule_deq(struct brcmf_fws_info *fws) 1160{ 1161 /* only schedule dequeue when there are credits for delayed traffic */ 1162 if ((fws->fifo_credit_map & fws->fifo_delay_map) || 1163 (!brcmf_fws_fc_active(fws) && fws->fifo_delay_map)) 1164 queue_work(fws->fws_wq, &fws->fws_dequeue_work); 1165} 1166 1167static int brcmf_fws_enq(struct brcmf_fws_info *fws, 1168 enum brcmf_fws_skb_state state, int fifo, 1169 struct sk_buff *p) 1170{ 1171 int prec = 2 * fifo; 1172 u32 *qfull_stat = &fws->stats.delayq_full_error; 1173 1174 struct brcmf_fws_mac_descriptor *entry; 1175 1176 entry = brcmf_skbcb(p)->mac; 1177 if (entry == NULL) { 1178 brcmf_err("no mac descriptor found for skb %p\n", p); 1179 return -ENOENT; 1180 } 1181 1182 brcmf_dbg(DATA, "enter: fifo %d skb %p\n", fifo, p); 1183 if (state == BRCMF_FWS_SKBSTATE_SUPPRESSED) { 1184 prec += 1; 1185 qfull_stat = &fws->stats.supprq_full_error; 1186 } 1187 1188 if (brcmu_pktq_penq(&entry->psq, prec, p) == NULL) { 1189 *qfull_stat += 1; 1190 return -ENFILE; 1191 } 1192 1193 /* increment total enqueued packet count */ 1194 fws->fifo_delay_map |= 1 << fifo; 1195 fws->fifo_enqpkt[fifo]++; 1196 1197 /* update the sk_buff state */ 1198 brcmf_skbcb(p)->state = state; 1199 1200 /* 1201 * A packet has been pushed so update traffic 1202 * availability bitmap, if applicable 1203 */ 1204 brcmf_fws_tim_update(fws, entry, fifo, true); 1205 brcmf_fws_flow_control_check(fws, &entry->psq, 1206 brcmf_skb_if_flags_get_field(p, INDEX)); 1207 return 0; 1208} 1209 1210static struct sk_buff *brcmf_fws_deq(struct brcmf_fws_info *fws, int fifo) 1211{ 1212 struct brcmf_fws_mac_descriptor *table; 1213 struct brcmf_fws_mac_descriptor *entry; 1214 struct sk_buff *p; 1215 int num_nodes; 1216 int node_pos; 1217 int prec_out; 1218 int pmsk; 1219 int i; 1220 1221 table = (struct brcmf_fws_mac_descriptor *)&fws->desc; 1222 num_nodes = sizeof(fws->desc) / sizeof(struct brcmf_fws_mac_descriptor); 1223 node_pos = fws->deq_node_pos[fifo]; 1224 1225 for (i = 0; i < num_nodes; i++) { 1226 entry = &table[(node_pos + i) % num_nodes]; 1227 if (!entry->occupied || 1228 brcmf_fws_macdesc_closed(fws, entry, fifo)) 1229 continue; 1230 1231 if (entry->suppressed) 1232 pmsk = 2; 1233 else 1234 pmsk = 3; 1235 p = brcmu_pktq_mdeq(&entry->psq, pmsk << (fifo * 2), &prec_out); 1236 if (p == NULL) { 1237 if (entry->suppressed) { 1238 if (entry->suppr_transit_count) 1239 continue; 1240 entry->suppressed = false; 1241 p = brcmu_pktq_mdeq(&entry->psq, 1242 1 << (fifo * 2), &prec_out); 1243 } 1244 } 1245 if (p == NULL) 1246 continue; 1247 1248 brcmf_fws_macdesc_use_req_credit(entry, p); 1249 1250 /* move dequeue position to ensure fair round-robin */ 1251 fws->deq_node_pos[fifo] = (node_pos + i + 1) % num_nodes; 1252 brcmf_fws_flow_control_check(fws, &entry->psq, 1253 brcmf_skb_if_flags_get_field(p, 1254 INDEX) 1255 ); 1256 /* 1257 * A packet has been picked up, update traffic 1258 * availability bitmap, if applicable 1259 */ 1260 brcmf_fws_tim_update(fws, entry, fifo, false); 1261 1262 /* 1263 * decrement total enqueued fifo packets and 1264 * clear delay bitmap if done. 1265 */ 1266 fws->fifo_enqpkt[fifo]--; 1267 if (fws->fifo_enqpkt[fifo] == 0) 1268 fws->fifo_delay_map &= ~(1 << fifo); 1269 goto done; 1270 } 1271 p = NULL; 1272done: 1273 brcmf_dbg(DATA, "exit: fifo %d skb %p\n", fifo, p); 1274 return p; 1275} 1276 1277static int brcmf_fws_txstatus_suppressed(struct brcmf_fws_info *fws, int fifo, 1278 struct sk_buff *skb, u32 genbit) 1279{ 1280 struct brcmf_fws_mac_descriptor *entry = brcmf_skbcb(skb)->mac; 1281 u32 hslot; 1282 int ret; 1283 u8 ifidx; 1284 1285 hslot = brcmf_skb_htod_tag_get_field(skb, HSLOT); 1286 1287 /* this packet was suppressed */ 1288 if (!entry->suppressed) { 1289 entry->suppressed = true; 1290 entry->suppr_transit_count = entry->transit_count; 1291 brcmf_dbg(DATA, "suppress %s: transit %d\n", 1292 entry->name, entry->transit_count); 1293 } 1294 1295 entry->generation = genbit; 1296 1297 ret = brcmf_proto_hdrpull(fws->drvr, false, &ifidx, skb); 1298 if (ret == 0) 1299 ret = brcmf_fws_enq(fws, BRCMF_FWS_SKBSTATE_SUPPRESSED, fifo, 1300 skb); 1301 if (ret != 0) { 1302 /* suppress q is full or hdrpull failed, drop this packet */ 1303 brcmf_fws_hanger_poppkt(&fws->hanger, hslot, &skb, 1304 true); 1305 } else { 1306 /* 1307 * Mark suppressed to avoid a double free during 1308 * wlfc cleanup 1309 */ 1310 brcmf_fws_hanger_mark_suppressed(&fws->hanger, hslot); 1311 } 1312 1313 return ret; 1314} 1315 1316static int 1317brcmf_fws_txs_process(struct brcmf_fws_info *fws, u8 flags, u32 hslot, 1318 u32 genbit) 1319{ 1320 u32 fifo; 1321 int ret; 1322 bool remove_from_hanger = true; 1323 struct sk_buff *skb; 1324 struct brcmf_skbuff_cb *skcb; 1325 struct brcmf_fws_mac_descriptor *entry = NULL; 1326 1327 brcmf_dbg(DATA, "flags %d\n", flags); 1328 1329 if (flags == BRCMF_FWS_TXSTATUS_DISCARD) 1330 fws->stats.txs_discard++; 1331 else if (flags == BRCMF_FWS_TXSTATUS_CORE_SUPPRESS) { 1332 fws->stats.txs_supp_core++; 1333 remove_from_hanger = false; 1334 } else if (flags == BRCMF_FWS_TXSTATUS_FW_PS_SUPPRESS) { 1335 fws->stats.txs_supp_ps++; 1336 remove_from_hanger = false; 1337 } else if (flags == BRCMF_FWS_TXSTATUS_FW_TOSSED) 1338 fws->stats.txs_tossed++; 1339 else if (flags == BRCMF_FWS_TXSTATUS_HOST_TOSSED) 1340 fws->stats.txs_host_tossed++; 1341 else 1342 brcmf_err("unexpected txstatus\n"); 1343 1344 ret = brcmf_fws_hanger_poppkt(&fws->hanger, hslot, &skb, 1345 remove_from_hanger); 1346 if (ret != 0) { 1347 brcmf_err("no packet in hanger slot: hslot=%d\n", hslot); 1348 return ret; 1349 } 1350 1351 skcb = brcmf_skbcb(skb); 1352 entry = skcb->mac; 1353 if (WARN_ON(!entry)) { 1354 brcmu_pkt_buf_free_skb(skb); 1355 return -EINVAL; 1356 } 1357 entry->transit_count--; 1358 if (entry->suppressed && entry->suppr_transit_count) 1359 entry->suppr_transit_count--; 1360 1361 brcmf_dbg(DATA, "%s flags %X htod %X\n", entry->name, skcb->if_flags, 1362 skcb->htod); 1363 1364 /* pick up the implicit credit from this packet */ 1365 fifo = brcmf_skb_htod_tag_get_field(skb, FIFO); 1366 if ((fws->fcmode == BRCMF_FWS_FCMODE_IMPLIED_CREDIT) || 1367 (brcmf_skb_if_flags_get_field(skb, REQ_CREDIT)) || 1368 (flags == BRCMF_FWS_TXSTATUS_HOST_TOSSED)) { 1369 brcmf_fws_return_credits(fws, fifo, 1); 1370 brcmf_fws_schedule_deq(fws); 1371 } 1372 brcmf_fws_macdesc_return_req_credit(skb); 1373 1374 if (!remove_from_hanger) 1375 ret = brcmf_fws_txstatus_suppressed(fws, fifo, skb, genbit); 1376 1377 if (remove_from_hanger || ret) 1378 brcmf_txfinalize(fws->drvr, skb, true); 1379 1380 return 0; 1381} 1382 1383static int brcmf_fws_fifocreditback_indicate(struct brcmf_fws_info *fws, 1384 u8 *data) 1385{ 1386 int i; 1387 1388 if (fws->fcmode != BRCMF_FWS_FCMODE_EXPLICIT_CREDIT) { 1389 brcmf_dbg(INFO, "ignored\n"); 1390 return BRCMF_FWS_RET_OK_NOSCHEDULE; 1391 } 1392 1393 brcmf_dbg(DATA, "enter: data %pM\n", data); 1394 brcmf_fws_lock(fws); 1395 for (i = 0; i < BRCMF_FWS_FIFO_COUNT; i++) 1396 brcmf_fws_return_credits(fws, i, data[i]); 1397 1398 brcmf_dbg(DATA, "map: credit %x delay %x\n", fws->fifo_credit_map, 1399 fws->fifo_delay_map); 1400 brcmf_fws_unlock(fws); 1401 return BRCMF_FWS_RET_OK_SCHEDULE; 1402} 1403 1404static int brcmf_fws_txstatus_indicate(struct brcmf_fws_info *fws, u8 *data) 1405{ 1406 __le32 status_le; 1407 u32 status; 1408 u32 hslot; 1409 u32 genbit; 1410 u8 flags; 1411 1412 fws->stats.txs_indicate++; 1413 memcpy(&status_le, data, sizeof(status_le)); 1414 status = le32_to_cpu(status_le); 1415 flags = brcmf_txstatus_get_field(status, FLAGS); 1416 hslot = brcmf_txstatus_get_field(status, HSLOT); 1417 genbit = brcmf_txstatus_get_field(status, GENERATION); 1418 1419 brcmf_fws_lock(fws); 1420 brcmf_fws_txs_process(fws, flags, hslot, genbit); 1421 brcmf_fws_unlock(fws); 1422 return BRCMF_FWS_RET_OK_NOSCHEDULE; 1423} 1424 1425static int brcmf_fws_dbg_seqnum_check(struct brcmf_fws_info *fws, u8 *data) 1426{ 1427 __le32 timestamp; 1428 1429 memcpy(×tamp, &data[2], sizeof(timestamp)); 1430 brcmf_dbg(CTL, "received: seq %d, timestamp %d\n", data[1], 1431 le32_to_cpu(timestamp)); 1432 return 0; 1433} 1434 1435static int brcmf_fws_notify_credit_map(struct brcmf_if *ifp, 1436 const struct brcmf_event_msg *e, 1437 void *data) 1438{ 1439 struct brcmf_fws_info *fws = ifp->drvr->fws; 1440 int i; 1441 u8 *credits = data; 1442 1443 if (e->datalen < BRCMF_FWS_FIFO_COUNT) { 1444 brcmf_err("event payload too small (%d)\n", e->datalen); 1445 return -EINVAL; 1446 } 1447 if (fws->creditmap_received) 1448 return 0; 1449 1450 fws->creditmap_received = true; 1451 1452 brcmf_dbg(TRACE, "enter: credits %pM\n", credits); 1453 brcmf_fws_lock(fws); 1454 for (i = 0; i < ARRAY_SIZE(fws->fifo_credit); i++) { 1455 if (*credits) 1456 fws->fifo_credit_map |= 1 << i; 1457 else 1458 fws->fifo_credit_map &= ~(1 << i); 1459 fws->fifo_credit[i] = *credits++; 1460 } 1461 brcmf_fws_schedule_deq(fws); 1462 brcmf_fws_unlock(fws); 1463 return 0; 1464} 1465 1466static int brcmf_fws_notify_bcmc_credit_support(struct brcmf_if *ifp, 1467 const struct brcmf_event_msg *e, 1468 void *data) 1469{ 1470 struct brcmf_fws_info *fws = ifp->drvr->fws; 1471 1472 brcmf_fws_lock(fws); 1473 if (fws) 1474 fws->bcmc_credit_check = true; 1475 brcmf_fws_unlock(fws); 1476 return 0; 1477} 1478 1479int brcmf_fws_hdrpull(struct brcmf_pub *drvr, int ifidx, s16 signal_len, 1480 struct sk_buff *skb) 1481{ 1482 struct brcmf_skb_reorder_data *rd; 1483 struct brcmf_fws_info *fws = drvr->fws; 1484 u8 *signal_data; 1485 s16 data_len; 1486 u8 type; 1487 u8 len; 1488 u8 *data; 1489 s32 status; 1490 s32 err; 1491 1492 brcmf_dbg(HDRS, "enter: ifidx %d, skblen %u, sig %d\n", 1493 ifidx, skb->len, signal_len); 1494 1495 WARN_ON(signal_len > skb->len); 1496 1497 if (!signal_len) 1498 return 0; 1499 /* if flow control disabled, skip to packet data and leave */ 1500 if (!fws->fw_signals) { 1501 skb_pull(skb, signal_len); 1502 return 0; 1503 } 1504 1505 fws->stats.header_pulls++; 1506 data_len = signal_len; 1507 signal_data = skb->data; 1508 1509 status = BRCMF_FWS_RET_OK_NOSCHEDULE; 1510 while (data_len > 0) { 1511 /* extract tlv info */ 1512 type = signal_data[0]; 1513 1514 /* FILLER type is actually not a TLV, but 1515 * a single byte that can be skipped. 1516 */ 1517 if (type == BRCMF_FWS_TYPE_FILLER) { 1518 signal_data += 1; 1519 data_len -= 1; 1520 continue; 1521 } 1522 len = signal_data[1]; 1523 data = signal_data + 2; 1524 1525 brcmf_dbg(HDRS, "tlv type=%s (%d), len=%d (%d)\n", 1526 brcmf_fws_get_tlv_name(type), type, len, 1527 brcmf_fws_get_tlv_len(fws, type)); 1528 1529 /* abort parsing when length invalid */ 1530 if (data_len < len + 2) 1531 break; 1532 1533 if (len < brcmf_fws_get_tlv_len(fws, type)) 1534 break; 1535 1536 err = BRCMF_FWS_RET_OK_NOSCHEDULE; 1537 switch (type) { 1538 case BRCMF_FWS_TYPE_COMP_TXSTATUS: 1539 break; 1540 case BRCMF_FWS_TYPE_HOST_REORDER_RXPKTS: 1541 rd = (struct brcmf_skb_reorder_data *)skb->cb; 1542 rd->reorder = data; 1543 break; 1544 case BRCMF_FWS_TYPE_MACDESC_ADD: 1545 case BRCMF_FWS_TYPE_MACDESC_DEL: 1546 brcmf_fws_macdesc_indicate(fws, type, data); 1547 break; 1548 case BRCMF_FWS_TYPE_MAC_OPEN: 1549 case BRCMF_FWS_TYPE_MAC_CLOSE: 1550 err = brcmf_fws_macdesc_state_indicate(fws, type, data); 1551 break; 1552 case BRCMF_FWS_TYPE_INTERFACE_OPEN: 1553 case BRCMF_FWS_TYPE_INTERFACE_CLOSE: 1554 err = brcmf_fws_interface_state_indicate(fws, type, 1555 data); 1556 break; 1557 case BRCMF_FWS_TYPE_MAC_REQUEST_CREDIT: 1558 case BRCMF_FWS_TYPE_MAC_REQUEST_PACKET: 1559 err = brcmf_fws_request_indicate(fws, type, data); 1560 break; 1561 case BRCMF_FWS_TYPE_TXSTATUS: 1562 brcmf_fws_txstatus_indicate(fws, data); 1563 break; 1564 case BRCMF_FWS_TYPE_FIFO_CREDITBACK: 1565 err = brcmf_fws_fifocreditback_indicate(fws, data); 1566 break; 1567 case BRCMF_FWS_TYPE_RSSI: 1568 brcmf_fws_rssi_indicate(fws, *data); 1569 break; 1570 case BRCMF_FWS_TYPE_TRANS_ID: 1571 brcmf_fws_dbg_seqnum_check(fws, data); 1572 break; 1573 case BRCMF_FWS_TYPE_PKTTAG: 1574 case BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP: 1575 default: 1576 fws->stats.tlv_invalid_type++; 1577 break; 1578 } 1579 if (err == BRCMF_FWS_RET_OK_SCHEDULE) 1580 status = BRCMF_FWS_RET_OK_SCHEDULE; 1581 signal_data += len + 2; 1582 data_len -= len + 2; 1583 } 1584 1585 if (data_len != 0) 1586 fws->stats.tlv_parse_failed++; 1587 1588 if (status == BRCMF_FWS_RET_OK_SCHEDULE) 1589 brcmf_fws_schedule_deq(fws); 1590 1591 /* signalling processing result does 1592 * not affect the actual ethernet packet. 1593 */ 1594 skb_pull(skb, signal_len); 1595 1596 /* this may be a signal-only packet 1597 */ 1598 if (skb->len == 0) 1599 fws->stats.header_only_pkt++; 1600 1601 return 0; 1602} 1603 1604static void brcmf_fws_precommit_skb(struct brcmf_fws_info *fws, int fifo, 1605 struct sk_buff *p) 1606{ 1607 struct brcmf_skbuff_cb *skcb = brcmf_skbcb(p); 1608 struct brcmf_fws_mac_descriptor *entry = skcb->mac; 1609 u8 flags; 1610 1611 brcmf_skb_if_flags_set_field(p, TRANSMIT, 1); 1612 brcmf_skb_htod_tag_set_field(p, GENERATION, entry->generation); 1613 flags = BRCMF_FWS_HTOD_FLAG_PKTFROMHOST; 1614 if (brcmf_skb_if_flags_get_field(p, REQUESTED)) { 1615 /* 1616 * Indicate that this packet is being sent in response to an 1617 * explicit request from the firmware side. 1618 */ 1619 flags |= BRCMF_FWS_HTOD_FLAG_PKT_REQUESTED; 1620 } 1621 brcmf_skb_htod_tag_set_field(p, FLAGS, flags); 1622 brcmf_fws_hdrpush(fws, p); 1623} 1624 1625static void brcmf_fws_rollback_toq(struct brcmf_fws_info *fws, 1626 struct sk_buff *skb, int fifo) 1627{ 1628 struct brcmf_fws_mac_descriptor *entry; 1629 struct sk_buff *pktout; 1630 int qidx, hslot; 1631 int rc = 0; 1632 1633 entry = brcmf_skbcb(skb)->mac; 1634 if (entry->occupied) { 1635 qidx = 2 * fifo; 1636 if (brcmf_skbcb(skb)->state == BRCMF_FWS_SKBSTATE_SUPPRESSED) 1637 qidx++; 1638 1639 pktout = brcmu_pktq_penq_head(&entry->psq, qidx, skb); 1640 if (pktout == NULL) { 1641 brcmf_err("%s queue %d full\n", entry->name, qidx); 1642 rc = -ENOSPC; 1643 } 1644 } else { 1645 brcmf_err("%s entry removed\n", entry->name); 1646 rc = -ENOENT; 1647 } 1648 1649 if (rc) { 1650 fws->stats.rollback_failed++; 1651 hslot = brcmf_skb_htod_tag_get_field(skb, HSLOT); 1652 brcmf_fws_txs_process(fws, BRCMF_FWS_TXSTATUS_HOST_TOSSED, 1653 hslot, 0); 1654 } else { 1655 fws->stats.rollback_success++; 1656 brcmf_fws_return_credits(fws, fifo, 1); 1657 brcmf_fws_macdesc_return_req_credit(skb); 1658 } 1659} 1660 1661static int brcmf_fws_borrow_credit(struct brcmf_fws_info *fws) 1662{ 1663 int lender_ac; 1664 1665 if (time_after(fws->borrow_defer_timestamp, jiffies)) { 1666 fws->fifo_credit_map &= ~(1 << BRCMF_FWS_FIFO_AC_BE); 1667 return -ENAVAIL; 1668 } 1669 1670 for (lender_ac = 0; lender_ac <= BRCMF_FWS_FIFO_AC_VO; lender_ac++) { 1671 if (fws->fifo_credit[lender_ac]) { 1672 fws->credits_borrowed[lender_ac]++; 1673 fws->fifo_credit[lender_ac]--; 1674 if (fws->fifo_credit[lender_ac] == 0) 1675 fws->fifo_credit_map &= ~(1 << lender_ac); 1676 fws->fifo_credit_map |= (1 << BRCMF_FWS_FIFO_AC_BE); 1677 brcmf_dbg(DATA, "borrow credit from: %d\n", lender_ac); 1678 return 0; 1679 } 1680 } 1681 fws->fifo_credit_map &= ~(1 << BRCMF_FWS_FIFO_AC_BE); 1682 return -ENAVAIL; 1683} 1684 1685static int brcmf_fws_commit_skb(struct brcmf_fws_info *fws, int fifo, 1686 struct sk_buff *skb) 1687{ 1688 struct brcmf_skbuff_cb *skcb = brcmf_skbcb(skb); 1689 struct brcmf_fws_mac_descriptor *entry; 1690 struct brcmf_bus *bus = fws->drvr->bus_if; 1691 int rc; 1692 u8 ifidx; 1693 1694 entry = skcb->mac; 1695 if (IS_ERR(entry)) 1696 return PTR_ERR(entry); 1697 1698 brcmf_fws_precommit_skb(fws, fifo, skb); 1699 entry->transit_count++; 1700 if (entry->suppressed) 1701 entry->suppr_transit_count++; 1702 brcmf_fws_unlock(fws); 1703 rc = brcmf_bus_txdata(bus, skb); 1704 brcmf_fws_lock(fws); 1705 brcmf_dbg(DATA, "%s flags %X htod %X bus_tx %d\n", entry->name, 1706 skcb->if_flags, skcb->htod, rc); 1707 if (rc < 0) { 1708 entry->transit_count--; 1709 if (entry->suppressed) 1710 entry->suppr_transit_count--; 1711 brcmf_proto_hdrpull(fws->drvr, false, &ifidx, skb); 1712 goto rollback; 1713 } 1714 1715 fws->stats.pkt2bus++; 1716 fws->stats.send_pkts[fifo]++; 1717 if (brcmf_skb_if_flags_get_field(skb, REQUESTED)) 1718 fws->stats.requested_sent[fifo]++; 1719 1720 return rc; 1721 1722rollback: 1723 brcmf_fws_rollback_toq(fws, skb, fifo); 1724 return rc; 1725} 1726 1727static int brcmf_fws_assign_htod(struct brcmf_fws_info *fws, struct sk_buff *p, 1728 int fifo) 1729{ 1730 struct brcmf_skbuff_cb *skcb = brcmf_skbcb(p); 1731 int rc, hslot; 1732 1733 hslot = brcmf_fws_hanger_get_free_slot(&fws->hanger); 1734 brcmf_skb_htod_tag_set_field(p, HSLOT, hslot); 1735 brcmf_skb_htod_tag_set_field(p, FREERUN, skcb->mac->seq[fifo]); 1736 brcmf_skb_htod_tag_set_field(p, FIFO, fifo); 1737 rc = brcmf_fws_hanger_pushpkt(&fws->hanger, p, hslot); 1738 if (!rc) 1739 skcb->mac->seq[fifo]++; 1740 else 1741 fws->stats.generic_error++; 1742 return rc; 1743} 1744 1745int brcmf_fws_process_skb(struct brcmf_if *ifp, struct sk_buff *skb) 1746{ 1747 struct brcmf_pub *drvr = ifp->drvr; 1748 struct brcmf_fws_info *fws = drvr->fws; 1749 struct brcmf_skbuff_cb *skcb = brcmf_skbcb(skb); 1750 struct ethhdr *eh = (struct ethhdr *)(skb->data); 1751 int fifo = BRCMF_FWS_FIFO_BCMC; 1752 bool multicast = is_multicast_ether_addr(eh->h_dest); 1753 bool pae = eh->h_proto == htons(ETH_P_PAE); 1754 1755 brcmf_dbg(DATA, "tx proto=0x%X\n", ntohs(eh->h_proto)); 1756 /* determine the priority */ 1757 if (!skb->priority) 1758 skb->priority = cfg80211_classify8021d(skb); 1759 1760 drvr->tx_multicast += !!multicast; 1761 if (pae) 1762 atomic_inc(&ifp->pend_8021x_cnt); 1763 1764 /* set control buffer information */ 1765 skcb->if_flags = 0; 1766 skcb->state = BRCMF_FWS_SKBSTATE_NEW; 1767 brcmf_skb_if_flags_set_field(skb, INDEX, ifp->ifidx); 1768 if (!multicast) 1769 fifo = brcmf_fws_prio2fifo[skb->priority]; 1770 1771 brcmf_fws_lock(fws); 1772 if (fifo != BRCMF_FWS_FIFO_AC_BE && fifo < BRCMF_FWS_FIFO_BCMC) 1773 fws->borrow_defer_timestamp = jiffies + 1774 BRCMF_FWS_BORROW_DEFER_PERIOD; 1775 1776 skcb->mac = brcmf_fws_macdesc_find(fws, ifp, eh->h_dest); 1777 brcmf_dbg(DATA, "%s mac %pM multi %d fifo %d\n", skcb->mac->name, 1778 eh->h_dest, multicast, fifo); 1779 if (!brcmf_fws_assign_htod(fws, skb, fifo)) { 1780 brcmf_fws_enq(fws, BRCMF_FWS_SKBSTATE_DELAYED, fifo, skb); 1781 brcmf_fws_schedule_deq(fws); 1782 } else { 1783 brcmf_err("drop skb: no hanger slot\n"); 1784 if (pae) { 1785 atomic_dec(&ifp->pend_8021x_cnt); 1786 if (waitqueue_active(&ifp->pend_8021x_wait)) 1787 wake_up(&ifp->pend_8021x_wait); 1788 } 1789 brcmu_pkt_buf_free_skb(skb); 1790 } 1791 brcmf_fws_unlock(fws); 1792 return 0; 1793} 1794 1795void brcmf_fws_reset_interface(struct brcmf_if *ifp) 1796{ 1797 struct brcmf_fws_mac_descriptor *entry = ifp->fws_desc; 1798 1799 brcmf_dbg(TRACE, "enter: idx=%d\n", ifp->bssidx); 1800 if (!entry) 1801 return; 1802 1803 brcmf_fws_macdesc_init(entry, ifp->mac_addr, ifp->ifidx); 1804} 1805 1806void brcmf_fws_add_interface(struct brcmf_if *ifp) 1807{ 1808 struct brcmf_fws_info *fws = ifp->drvr->fws; 1809 struct brcmf_fws_mac_descriptor *entry; 1810 1811 if (!ifp->ndev) 1812 return; 1813 1814 entry = &fws->desc.iface[ifp->ifidx]; 1815 ifp->fws_desc = entry; 1816 brcmf_fws_macdesc_init(entry, ifp->mac_addr, ifp->ifidx); 1817 brcmf_fws_macdesc_set_name(fws, entry); 1818 brcmu_pktq_init(&entry->psq, BRCMF_FWS_PSQ_PREC_COUNT, 1819 BRCMF_FWS_PSQ_LEN); 1820 brcmf_dbg(TRACE, "added %s\n", entry->name); 1821} 1822 1823void brcmf_fws_del_interface(struct brcmf_if *ifp) 1824{ 1825 struct brcmf_fws_mac_descriptor *entry = ifp->fws_desc; 1826 1827 if (!entry) 1828 return; 1829 1830 brcmf_fws_lock(ifp->drvr->fws); 1831 ifp->fws_desc = NULL; 1832 brcmf_dbg(TRACE, "deleting %s\n", entry->name); 1833 brcmf_fws_macdesc_deinit(entry); 1834 brcmf_fws_cleanup(ifp->drvr->fws, ifp->ifidx); 1835 brcmf_fws_unlock(ifp->drvr->fws); 1836} 1837 1838static void brcmf_fws_dequeue_worker(struct work_struct *worker) 1839{ 1840 struct brcmf_fws_info *fws; 1841 struct brcmf_pub *drvr; 1842 struct sk_buff *skb; 1843 int fifo; 1844 u32 hslot; 1845 u32 ifidx; 1846 int ret; 1847 1848 fws = container_of(worker, struct brcmf_fws_info, fws_dequeue_work); 1849 drvr = fws->drvr; 1850 1851 brcmf_fws_lock(fws); 1852 for (fifo = BRCMF_FWS_FIFO_BCMC; fifo >= 0 && !fws->bus_flow_blocked; 1853 fifo--) { 1854 if (!brcmf_fws_fc_active(fws)) { 1855 while ((skb = brcmf_fws_deq(fws, fifo)) != NULL) { 1856 hslot = brcmf_skb_htod_tag_get_field(skb, 1857 HSLOT); 1858 brcmf_fws_hanger_poppkt(&fws->hanger, hslot, 1859 &skb, true); 1860 ifidx = brcmf_skb_if_flags_get_field(skb, 1861 INDEX); 1862 brcmf_proto_hdrpush(drvr, ifidx, 0, skb); 1863 /* Use bus module to send data frame */ 1864 brcmf_fws_unlock(fws); 1865 ret = brcmf_bus_txdata(drvr->bus_if, skb); 1866 brcmf_fws_lock(fws); 1867 if (ret < 0) 1868 brcmf_txfinalize(drvr, skb, false); 1869 if (fws->bus_flow_blocked) 1870 break; 1871 } 1872 continue; 1873 } 1874 while ((fws->fifo_credit[fifo]) || ((!fws->bcmc_credit_check) && 1875 (fifo == BRCMF_FWS_FIFO_BCMC))) { 1876 skb = brcmf_fws_deq(fws, fifo); 1877 if (!skb) 1878 break; 1879 fws->fifo_credit[fifo]--; 1880 if (brcmf_fws_commit_skb(fws, fifo, skb)) 1881 break; 1882 if (fws->bus_flow_blocked) 1883 break; 1884 } 1885 if ((fifo == BRCMF_FWS_FIFO_AC_BE) && 1886 (fws->fifo_credit[fifo] == 0) && 1887 (!fws->bus_flow_blocked)) { 1888 while (brcmf_fws_borrow_credit(fws) == 0) { 1889 skb = brcmf_fws_deq(fws, fifo); 1890 if (!skb) { 1891 brcmf_fws_return_credits(fws, fifo, 1); 1892 break; 1893 } 1894 if (brcmf_fws_commit_skb(fws, fifo, skb)) 1895 break; 1896 if (fws->bus_flow_blocked) 1897 break; 1898 } 1899 } 1900 } 1901 brcmf_fws_unlock(fws); 1902} 1903 1904int brcmf_fws_init(struct brcmf_pub *drvr) 1905{ 1906 struct brcmf_fws_info *fws; 1907 u32 tlv = BRCMF_FWS_FLAGS_RSSI_SIGNALS; 1908 int rc; 1909 1910 drvr->fws = kzalloc(sizeof(*(drvr->fws)), GFP_KERNEL); 1911 if (!drvr->fws) { 1912 rc = -ENOMEM; 1913 goto fail; 1914 } 1915 1916 fws = drvr->fws; 1917 1918 spin_lock_init(&fws->spinlock); 1919 1920 /* set linkage back */ 1921 fws->drvr = drvr; 1922 fws->fcmode = fcmode; 1923 1924 fws->fws_wq = create_singlethread_workqueue("brcmf_fws_wq"); 1925 if (fws->fws_wq == NULL) { 1926 brcmf_err("workqueue creation failed\n"); 1927 rc = -EBADF; 1928 goto fail; 1929 } 1930 INIT_WORK(&fws->fws_dequeue_work, brcmf_fws_dequeue_worker); 1931 1932 /* enable firmware signalling if fcmode active */ 1933 if (fws->fcmode != BRCMF_FWS_FCMODE_NONE) 1934 tlv |= BRCMF_FWS_FLAGS_XONXOFF_SIGNALS | 1935 BRCMF_FWS_FLAGS_CREDIT_STATUS_SIGNALS | 1936 BRCMF_FWS_FLAGS_HOST_PROPTXSTATUS_ACTIVE | 1937 BRCMF_FWS_FLAGS_HOST_RXREORDER_ACTIVE; 1938 1939 rc = brcmf_fweh_register(drvr, BRCMF_E_FIFO_CREDIT_MAP, 1940 brcmf_fws_notify_credit_map); 1941 if (rc < 0) { 1942 brcmf_err("register credit map handler failed\n"); 1943 goto fail; 1944 } 1945 rc = brcmf_fweh_register(drvr, BRCMF_E_BCMC_CREDIT_SUPPORT, 1946 brcmf_fws_notify_bcmc_credit_support); 1947 if (rc < 0) { 1948 brcmf_err("register bcmc credit handler failed\n"); 1949 brcmf_fweh_unregister(drvr, BRCMF_E_FIFO_CREDIT_MAP); 1950 goto fail; 1951 } 1952 1953 /* Setting the iovar may fail if feature is unsupported 1954 * so leave the rc as is so driver initialization can 1955 * continue. Set mode back to none indicating not enabled. 1956 */ 1957 fws->fw_signals = true; 1958 if (brcmf_fil_iovar_int_set(drvr->iflist[0], "tlv", tlv)) { 1959 brcmf_err("failed to set bdcv2 tlv signaling\n"); 1960 fws->fcmode = BRCMF_FWS_FCMODE_NONE; 1961 fws->fw_signals = false; 1962 } 1963 1964 if (brcmf_fil_iovar_int_set(drvr->iflist[0], "ampdu_hostreorder", 1)) 1965 brcmf_dbg(INFO, "enabling AMPDU host-reorder failed\n"); 1966 1967 brcmf_fws_hanger_init(&fws->hanger); 1968 brcmf_fws_macdesc_init(&fws->desc.other, NULL, 0); 1969 brcmf_fws_macdesc_set_name(fws, &fws->desc.other); 1970 brcmu_pktq_init(&fws->desc.other.psq, BRCMF_FWS_PSQ_PREC_COUNT, 1971 BRCMF_FWS_PSQ_LEN); 1972 1973 /* create debugfs file for statistics */ 1974 brcmf_debugfs_create_fws_stats(drvr, &fws->stats); 1975 1976 brcmf_dbg(INFO, "%s bdcv2 tlv signaling [%x]\n", 1977 fws->fw_signals ? "enabled" : "disabled", tlv); 1978 return 0; 1979 1980fail: 1981 brcmf_fws_deinit(drvr); 1982 return rc; 1983} 1984 1985void brcmf_fws_deinit(struct brcmf_pub *drvr) 1986{ 1987 struct brcmf_fws_info *fws = drvr->fws; 1988 1989 if (!fws) 1990 return; 1991 1992 if (drvr->fws->fws_wq) 1993 destroy_workqueue(drvr->fws->fws_wq); 1994 1995 /* cleanup */ 1996 brcmf_fws_lock(fws); 1997 brcmf_fws_cleanup(fws, -1); 1998 drvr->fws = NULL; 1999 brcmf_fws_unlock(fws); 2000 2001 /* free top structure */ 2002 kfree(fws); 2003} 2004 2005bool brcmf_fws_fc_active(struct brcmf_fws_info *fws) 2006{ 2007 if (!fws->creditmap_received) 2008 return false; 2009 2010 return fws->fcmode != BRCMF_FWS_FCMODE_NONE; 2011} 2012 2013void brcmf_fws_bustxfail(struct brcmf_fws_info *fws, struct sk_buff *skb) 2014{ 2015 u32 hslot; 2016 2017 if (brcmf_skbcb(skb)->state == BRCMF_FWS_SKBSTATE_TIM) { 2018 brcmu_pkt_buf_free_skb(skb); 2019 return; 2020 } 2021 brcmf_fws_lock(fws); 2022 hslot = brcmf_skb_htod_tag_get_field(skb, HSLOT); 2023 brcmf_fws_txs_process(fws, BRCMF_FWS_TXSTATUS_HOST_TOSSED, hslot, 0); 2024 brcmf_fws_unlock(fws); 2025} 2026 2027void brcmf_fws_bus_blocked(struct brcmf_pub *drvr, bool flow_blocked) 2028{ 2029 struct brcmf_fws_info *fws = drvr->fws; 2030 2031 fws->bus_flow_blocked = flow_blocked; 2032 if (!flow_blocked) 2033 brcmf_fws_schedule_deq(fws); 2034 else 2035 fws->stats.bus_flow_block++; 2036} 2037