fwsignal.c revision 7b8a466e7cd36fc2acdba5c22a594e75d9b9f61a
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_dbg.h" 31#include "dhd_bus.h" 32#include "fwil.h" 33#include "fwil_types.h" 34#include "fweh.h" 35#include "fwsignal.h" 36#include "p2p.h" 37#include "wl_cfg80211.h" 38#include "proto.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 107 108 109static const char *brcmf_fws_get_tlv_name(enum brcmf_fws_tlv_type id) 110{ 111 int i; 112 113 for (i = 0; i < ARRAY_SIZE(brcmf_fws_tlv_names); i++) 114 if (brcmf_fws_tlv_names[i].id == id) 115 return brcmf_fws_tlv_names[i].name; 116 117 return "INVALID"; 118} 119#else 120static const char *brcmf_fws_get_tlv_name(enum brcmf_fws_tlv_type id) 121{ 122 return "NODEBUG"; 123} 124#endif /* DEBUG */ 125 126/* 127 * The PKTTAG tlv has additional bytes when firmware-signalling 128 * mode has REUSESEQ flag set. 129 */ 130#define BRCMF_FWS_TYPE_SEQ_LEN 2 131 132/* 133 * flags used to enable tlv signalling from firmware. 134 */ 135#define BRCMF_FWS_FLAGS_RSSI_SIGNALS 0x0001 136#define BRCMF_FWS_FLAGS_XONXOFF_SIGNALS 0x0002 137#define BRCMF_FWS_FLAGS_CREDIT_STATUS_SIGNALS 0x0004 138#define BRCMF_FWS_FLAGS_HOST_PROPTXSTATUS_ACTIVE 0x0008 139#define BRCMF_FWS_FLAGS_PSQ_GENERATIONFSM_ENABLE 0x0010 140#define BRCMF_FWS_FLAGS_PSQ_ZERO_BUFFER_ENABLE 0x0020 141#define BRCMF_FWS_FLAGS_HOST_RXREORDER_ACTIVE 0x0040 142 143#define BRCMF_FWS_MAC_DESC_TABLE_SIZE 32 144#define BRCMF_FWS_MAC_DESC_ID_INVALID 0xff 145 146#define BRCMF_FWS_HOSTIF_FLOWSTATE_OFF 0 147#define BRCMF_FWS_HOSTIF_FLOWSTATE_ON 1 148#define BRCMF_FWS_FLOWCONTROL_HIWATER 128 149#define BRCMF_FWS_FLOWCONTROL_LOWATER 64 150 151#define BRCMF_FWS_PSQ_PREC_COUNT ((BRCMF_FWS_FIFO_COUNT + 1) * 2) 152#define BRCMF_FWS_PSQ_LEN 256 153 154#define BRCMF_FWS_HTOD_FLAG_PKTFROMHOST 0x01 155#define BRCMF_FWS_HTOD_FLAG_PKT_REQUESTED 0x02 156 157#define BRCMF_FWS_RET_OK_NOSCHEDULE 0 158#define BRCMF_FWS_RET_OK_SCHEDULE 1 159 160#define BRCMF_FWS_MODE_REUSESEQ_SHIFT 3 /* seq reuse */ 161#define BRCMF_FWS_MODE_SET_REUSESEQ(x, val) ((x) = \ 162 ((x) & ~(1 << BRCMF_FWS_MODE_REUSESEQ_SHIFT)) | \ 163 (((val) & 1) << BRCMF_FWS_MODE_REUSESEQ_SHIFT)) 164#define BRCMF_FWS_MODE_GET_REUSESEQ(x) \ 165 (((x) >> BRCMF_FWS_MODE_REUSESEQ_SHIFT) & 1) 166 167/** 168 * enum brcmf_fws_skb_state - indicates processing state of skb. 169 * 170 * @BRCMF_FWS_SKBSTATE_NEW: sk_buff is newly arrived in the driver. 171 * @BRCMF_FWS_SKBSTATE_DELAYED: sk_buff had to wait on queue. 172 * @BRCMF_FWS_SKBSTATE_SUPPRESSED: sk_buff has been suppressed by firmware. 173 * @BRCMF_FWS_SKBSTATE_TIM: allocated for TIM update info. 174 */ 175enum brcmf_fws_skb_state { 176 BRCMF_FWS_SKBSTATE_NEW, 177 BRCMF_FWS_SKBSTATE_DELAYED, 178 BRCMF_FWS_SKBSTATE_SUPPRESSED, 179 BRCMF_FWS_SKBSTATE_TIM 180}; 181 182/** 183 * struct brcmf_skbuff_cb - control buffer associated with skbuff. 184 * 185 * @bus_flags: 2 bytes reserved for bus specific parameters 186 * @if_flags: holds interface index and packet related flags. 187 * @htod: host to device packet identifier (used in PKTTAG tlv). 188 * @htod_seq: this 16-bit is original seq number for every suppress packet. 189 * @state: transmit state of the packet. 190 * @mac: descriptor related to destination for this packet. 191 * 192 * This information is stored in control buffer struct sk_buff::cb, which 193 * provides 48 bytes of storage so this structure should not exceed that. 194 */ 195struct brcmf_skbuff_cb { 196 u16 bus_flags; 197 u16 if_flags; 198 u32 htod; 199 u16 htod_seq; 200 enum brcmf_fws_skb_state state; 201 struct brcmf_fws_mac_descriptor *mac; 202}; 203 204/* 205 * macro casting skbuff control buffer to struct brcmf_skbuff_cb. 206 */ 207#define brcmf_skbcb(skb) ((struct brcmf_skbuff_cb *)((skb)->cb)) 208 209/* 210 * sk_buff control if flags 211 * 212 * b[11] - packet sent upon firmware request. 213 * b[10] - packet only contains signalling data. 214 * b[9] - packet is a tx packet. 215 * b[8] - packet used requested credit 216 * b[7] - interface in AP mode. 217 * b[3:0] - interface index. 218 */ 219#define BRCMF_SKB_IF_FLAGS_REQUESTED_MASK 0x0800 220#define BRCMF_SKB_IF_FLAGS_REQUESTED_SHIFT 11 221#define BRCMF_SKB_IF_FLAGS_SIGNAL_ONLY_MASK 0x0400 222#define BRCMF_SKB_IF_FLAGS_SIGNAL_ONLY_SHIFT 10 223#define BRCMF_SKB_IF_FLAGS_TRANSMIT_MASK 0x0200 224#define BRCMF_SKB_IF_FLAGS_TRANSMIT_SHIFT 9 225#define BRCMF_SKB_IF_FLAGS_REQ_CREDIT_MASK 0x0100 226#define BRCMF_SKB_IF_FLAGS_REQ_CREDIT_SHIFT 8 227#define BRCMF_SKB_IF_FLAGS_IF_AP_MASK 0x0080 228#define BRCMF_SKB_IF_FLAGS_IF_AP_SHIFT 7 229#define BRCMF_SKB_IF_FLAGS_INDEX_MASK 0x000f 230#define BRCMF_SKB_IF_FLAGS_INDEX_SHIFT 0 231 232#define brcmf_skb_if_flags_set_field(skb, field, value) \ 233 brcmu_maskset16(&(brcmf_skbcb(skb)->if_flags), \ 234 BRCMF_SKB_IF_FLAGS_ ## field ## _MASK, \ 235 BRCMF_SKB_IF_FLAGS_ ## field ## _SHIFT, (value)) 236#define brcmf_skb_if_flags_get_field(skb, field) \ 237 brcmu_maskget16(brcmf_skbcb(skb)->if_flags, \ 238 BRCMF_SKB_IF_FLAGS_ ## field ## _MASK, \ 239 BRCMF_SKB_IF_FLAGS_ ## field ## _SHIFT) 240 241/* 242 * sk_buff control packet identifier 243 * 244 * 32-bit packet identifier used in PKTTAG tlv from host to dongle. 245 * 246 * - Generated at the host (e.g. dhd) 247 * - Seen as a generic sequence number by firmware except for the flags field. 248 * 249 * Generation : b[31] => generation number for this packet [host->fw] 250 * OR, current generation number [fw->host] 251 * Flags : b[30:27] => command, status flags 252 * FIFO-AC : b[26:24] => AC-FIFO id 253 * h-slot : b[23:8] => hanger-slot 254 * freerun : b[7:0] => A free running counter 255 */ 256#define BRCMF_SKB_HTOD_TAG_GENERATION_MASK 0x80000000 257#define BRCMF_SKB_HTOD_TAG_GENERATION_SHIFT 31 258#define BRCMF_SKB_HTOD_TAG_FLAGS_MASK 0x78000000 259#define BRCMF_SKB_HTOD_TAG_FLAGS_SHIFT 27 260#define BRCMF_SKB_HTOD_TAG_FIFO_MASK 0x07000000 261#define BRCMF_SKB_HTOD_TAG_FIFO_SHIFT 24 262#define BRCMF_SKB_HTOD_TAG_HSLOT_MASK 0x00ffff00 263#define BRCMF_SKB_HTOD_TAG_HSLOT_SHIFT 8 264#define BRCMF_SKB_HTOD_TAG_FREERUN_MASK 0x000000ff 265#define BRCMF_SKB_HTOD_TAG_FREERUN_SHIFT 0 266 267#define brcmf_skb_htod_tag_set_field(skb, field, value) \ 268 brcmu_maskset32(&(brcmf_skbcb(skb)->htod), \ 269 BRCMF_SKB_HTOD_TAG_ ## field ## _MASK, \ 270 BRCMF_SKB_HTOD_TAG_ ## field ## _SHIFT, (value)) 271#define brcmf_skb_htod_tag_get_field(skb, field) \ 272 brcmu_maskget32(brcmf_skbcb(skb)->htod, \ 273 BRCMF_SKB_HTOD_TAG_ ## field ## _MASK, \ 274 BRCMF_SKB_HTOD_TAG_ ## field ## _SHIFT) 275 276#define BRCMF_SKB_HTOD_SEQ_FROMFW_MASK 0x2000 277#define BRCMF_SKB_HTOD_SEQ_FROMFW_SHIFT 13 278#define BRCMF_SKB_HTOD_SEQ_FROMDRV_MASK 0x1000 279#define BRCMF_SKB_HTOD_SEQ_FROMDRV_SHIFT 12 280#define BRCMF_SKB_HTOD_SEQ_NR_MASK 0x0fff 281#define BRCMF_SKB_HTOD_SEQ_NR_SHIFT 0 282 283#define brcmf_skb_htod_seq_set_field(skb, field, value) \ 284 brcmu_maskset16(&(brcmf_skbcb(skb)->htod_seq), \ 285 BRCMF_SKB_HTOD_SEQ_ ## field ## _MASK, \ 286 BRCMF_SKB_HTOD_SEQ_ ## field ## _SHIFT, (value)) 287#define brcmf_skb_htod_seq_get_field(skb, field) \ 288 brcmu_maskget16(brcmf_skbcb(skb)->htod_seq, \ 289 BRCMF_SKB_HTOD_SEQ_ ## field ## _MASK, \ 290 BRCMF_SKB_HTOD_SEQ_ ## field ## _SHIFT) 291 292#define BRCMF_FWS_TXSTAT_GENERATION_MASK 0x80000000 293#define BRCMF_FWS_TXSTAT_GENERATION_SHIFT 31 294#define BRCMF_FWS_TXSTAT_FLAGS_MASK 0x78000000 295#define BRCMF_FWS_TXSTAT_FLAGS_SHIFT 27 296#define BRCMF_FWS_TXSTAT_FIFO_MASK 0x07000000 297#define BRCMF_FWS_TXSTAT_FIFO_SHIFT 24 298#define BRCMF_FWS_TXSTAT_HSLOT_MASK 0x00FFFF00 299#define BRCMF_FWS_TXSTAT_HSLOT_SHIFT 8 300#define BRCMF_FWS_TXSTAT_FREERUN_MASK 0x000000FF 301#define BRCMF_FWS_TXSTAT_FREERUN_SHIFT 0 302 303#define brcmf_txstatus_get_field(txs, field) \ 304 brcmu_maskget32(txs, BRCMF_FWS_TXSTAT_ ## field ## _MASK, \ 305 BRCMF_FWS_TXSTAT_ ## field ## _SHIFT) 306 307/* How long to defer borrowing in jiffies */ 308#define BRCMF_FWS_BORROW_DEFER_PERIOD (HZ / 10) 309 310/** 311 * enum brcmf_fws_fifo - fifo indices used by dongle firmware. 312 * 313 * @BRCMF_FWS_FIFO_FIRST: first fifo, ie. background. 314 * @BRCMF_FWS_FIFO_AC_BK: fifo for background traffic. 315 * @BRCMF_FWS_FIFO_AC_BE: fifo for best-effort traffic. 316 * @BRCMF_FWS_FIFO_AC_VI: fifo for video traffic. 317 * @BRCMF_FWS_FIFO_AC_VO: fifo for voice traffic. 318 * @BRCMF_FWS_FIFO_BCMC: fifo for broadcast/multicast (AP only). 319 * @BRCMF_FWS_FIFO_ATIM: fifo for ATIM (AP only). 320 * @BRCMF_FWS_FIFO_COUNT: number of fifos. 321 */ 322enum brcmf_fws_fifo { 323 BRCMF_FWS_FIFO_FIRST, 324 BRCMF_FWS_FIFO_AC_BK = BRCMF_FWS_FIFO_FIRST, 325 BRCMF_FWS_FIFO_AC_BE, 326 BRCMF_FWS_FIFO_AC_VI, 327 BRCMF_FWS_FIFO_AC_VO, 328 BRCMF_FWS_FIFO_BCMC, 329 BRCMF_FWS_FIFO_ATIM, 330 BRCMF_FWS_FIFO_COUNT 331}; 332 333/** 334 * enum brcmf_fws_txstatus - txstatus flag values. 335 * 336 * @BRCMF_FWS_TXSTATUS_DISCARD: 337 * host is free to discard the packet. 338 * @BRCMF_FWS_TXSTATUS_CORE_SUPPRESS: 339 * 802.11 core suppressed the packet. 340 * @BRCMF_FWS_TXSTATUS_FW_PS_SUPPRESS: 341 * firmware suppress the packet as device is already in PS mode. 342 * @BRCMF_FWS_TXSTATUS_FW_TOSSED: 343 * firmware tossed the packet. 344 * @BRCMF_FWS_TXSTATUS_HOST_TOSSED: 345 * host tossed the packet. 346 */ 347enum brcmf_fws_txstatus { 348 BRCMF_FWS_TXSTATUS_DISCARD, 349 BRCMF_FWS_TXSTATUS_CORE_SUPPRESS, 350 BRCMF_FWS_TXSTATUS_FW_PS_SUPPRESS, 351 BRCMF_FWS_TXSTATUS_FW_TOSSED, 352 BRCMF_FWS_TXSTATUS_HOST_TOSSED 353}; 354 355enum brcmf_fws_fcmode { 356 BRCMF_FWS_FCMODE_NONE, 357 BRCMF_FWS_FCMODE_IMPLIED_CREDIT, 358 BRCMF_FWS_FCMODE_EXPLICIT_CREDIT 359}; 360 361enum brcmf_fws_mac_desc_state { 362 BRCMF_FWS_STATE_OPEN = 1, 363 BRCMF_FWS_STATE_CLOSE 364}; 365 366/** 367 * struct brcmf_fws_mac_descriptor - firmware signalling data per node/interface 368 * 369 * @occupied: slot is in use. 370 * @mac_handle: handle for mac entry determined by firmware. 371 * @interface_id: interface index. 372 * @state: current state. 373 * @suppressed: mac entry is suppressed. 374 * @generation: generation bit. 375 * @ac_bitmap: ac queue bitmap. 376 * @requested_credit: credits requested by firmware. 377 * @ea: ethernet address. 378 * @seq: per-node free-running sequence. 379 * @psq: power-save queue. 380 * @transit_count: packet in transit to firmware. 381 */ 382struct brcmf_fws_mac_descriptor { 383 char name[16]; 384 u8 occupied; 385 u8 mac_handle; 386 u8 interface_id; 387 u8 state; 388 bool suppressed; 389 u8 generation; 390 u8 ac_bitmap; 391 u8 requested_credit; 392 u8 requested_packet; 393 u8 ea[ETH_ALEN]; 394 u8 seq[BRCMF_FWS_FIFO_COUNT]; 395 struct pktq psq; 396 int transit_count; 397 int suppr_transit_count; 398 bool send_tim_signal; 399 u8 traffic_pending_bmp; 400 u8 traffic_lastreported_bmp; 401}; 402 403#define BRCMF_FWS_HANGER_MAXITEMS 1024 404 405/** 406 * enum brcmf_fws_hanger_item_state - state of hanger item. 407 * 408 * @BRCMF_FWS_HANGER_ITEM_STATE_FREE: item is free for use. 409 * @BRCMF_FWS_HANGER_ITEM_STATE_INUSE: item is in use. 410 * @BRCMF_FWS_HANGER_ITEM_STATE_INUSE_SUPPRESSED: item was suppressed. 411 */ 412enum brcmf_fws_hanger_item_state { 413 BRCMF_FWS_HANGER_ITEM_STATE_FREE = 1, 414 BRCMF_FWS_HANGER_ITEM_STATE_INUSE, 415 BRCMF_FWS_HANGER_ITEM_STATE_INUSE_SUPPRESSED 416}; 417 418 419/** 420 * struct brcmf_fws_hanger_item - single entry for tx pending packet. 421 * 422 * @state: entry is either free or occupied. 423 * @pkt: packet itself. 424 */ 425struct brcmf_fws_hanger_item { 426 enum brcmf_fws_hanger_item_state state; 427 struct sk_buff *pkt; 428}; 429 430/** 431 * struct brcmf_fws_hanger - holds packets awaiting firmware txstatus. 432 * 433 * @pushed: packets pushed to await txstatus. 434 * @popped: packets popped upon handling txstatus. 435 * @failed_to_push: packets that could not be pushed. 436 * @failed_to_pop: packets that could not be popped. 437 * @failed_slotfind: packets for which failed to find an entry. 438 * @slot_pos: last returned item index for a free entry. 439 * @items: array of hanger items. 440 */ 441struct brcmf_fws_hanger { 442 u32 pushed; 443 u32 popped; 444 u32 failed_to_push; 445 u32 failed_to_pop; 446 u32 failed_slotfind; 447 u32 slot_pos; 448 struct brcmf_fws_hanger_item items[BRCMF_FWS_HANGER_MAXITEMS]; 449}; 450 451struct brcmf_fws_macdesc_table { 452 struct brcmf_fws_mac_descriptor nodes[BRCMF_FWS_MAC_DESC_TABLE_SIZE]; 453 struct brcmf_fws_mac_descriptor iface[BRCMF_MAX_IFS]; 454 struct brcmf_fws_mac_descriptor other; 455}; 456 457struct brcmf_fws_info { 458 struct brcmf_pub *drvr; 459 spinlock_t spinlock; 460 ulong flags; 461 struct brcmf_fws_stats stats; 462 struct brcmf_fws_hanger hanger; 463 enum brcmf_fws_fcmode fcmode; 464 bool fw_signals; 465 bool bcmc_credit_check; 466 struct brcmf_fws_macdesc_table desc; 467 struct workqueue_struct *fws_wq; 468 struct work_struct fws_dequeue_work; 469 u32 fifo_enqpkt[BRCMF_FWS_FIFO_COUNT]; 470 int fifo_credit[BRCMF_FWS_FIFO_COUNT]; 471 int credits_borrowed[BRCMF_FWS_FIFO_AC_VO + 1]; 472 int deq_node_pos[BRCMF_FWS_FIFO_COUNT]; 473 u32 fifo_credit_map; 474 u32 fifo_delay_map; 475 unsigned long borrow_defer_timestamp; 476 bool bus_flow_blocked; 477 bool creditmap_received; 478 u8 mode; 479}; 480 481/* 482 * brcmf_fws_prio2fifo - mapping from 802.1d priority to firmware fifo index. 483 */ 484static const int brcmf_fws_prio2fifo[] = { 485 BRCMF_FWS_FIFO_AC_BE, 486 BRCMF_FWS_FIFO_AC_BK, 487 BRCMF_FWS_FIFO_AC_BK, 488 BRCMF_FWS_FIFO_AC_BE, 489 BRCMF_FWS_FIFO_AC_VI, 490 BRCMF_FWS_FIFO_AC_VI, 491 BRCMF_FWS_FIFO_AC_VO, 492 BRCMF_FWS_FIFO_AC_VO 493}; 494 495static int fcmode; 496module_param(fcmode, int, S_IRUSR); 497MODULE_PARM_DESC(fcmode, "mode of firmware signalled flow control"); 498 499#define BRCMF_FWS_TLV_DEF(name, id, len) \ 500 case BRCMF_FWS_TYPE_ ## name: \ 501 return len; 502 503/** 504 * brcmf_fws_get_tlv_len() - returns defined length for given tlv id. 505 * 506 * @fws: firmware-signalling information. 507 * @id: identifier of the TLV. 508 * 509 * Return: the specified length for the given TLV; Otherwise -EINVAL. 510 */ 511static int brcmf_fws_get_tlv_len(struct brcmf_fws_info *fws, 512 enum brcmf_fws_tlv_type id) 513{ 514 switch (id) { 515 BRCMF_FWS_TLV_DEFLIST 516 default: 517 fws->stats.tlv_invalid_type++; 518 break; 519 } 520 return -EINVAL; 521} 522#undef BRCMF_FWS_TLV_DEF 523 524static void brcmf_fws_lock(struct brcmf_fws_info *fws) 525 __acquires(&fws->spinlock) 526{ 527 spin_lock_irqsave(&fws->spinlock, fws->flags); 528} 529 530static void brcmf_fws_unlock(struct brcmf_fws_info *fws) 531 __releases(&fws->spinlock) 532{ 533 spin_unlock_irqrestore(&fws->spinlock, fws->flags); 534} 535 536static bool brcmf_fws_ifidx_match(struct sk_buff *skb, void *arg) 537{ 538 u32 ifidx = brcmf_skb_if_flags_get_field(skb, INDEX); 539 return ifidx == *(int *)arg; 540} 541 542static void brcmf_fws_psq_flush(struct brcmf_fws_info *fws, struct pktq *q, 543 int ifidx) 544{ 545 bool (*matchfn)(struct sk_buff *, void *) = NULL; 546 struct sk_buff *skb; 547 int prec; 548 549 if (ifidx != -1) 550 matchfn = brcmf_fws_ifidx_match; 551 for (prec = 0; prec < q->num_prec; prec++) { 552 skb = brcmu_pktq_pdeq_match(q, prec, matchfn, &ifidx); 553 while (skb) { 554 brcmu_pkt_buf_free_skb(skb); 555 skb = brcmu_pktq_pdeq_match(q, prec, matchfn, &ifidx); 556 } 557 } 558} 559 560static void brcmf_fws_hanger_init(struct brcmf_fws_hanger *hanger) 561{ 562 int i; 563 564 memset(hanger, 0, sizeof(*hanger)); 565 for (i = 0; i < ARRAY_SIZE(hanger->items); i++) 566 hanger->items[i].state = BRCMF_FWS_HANGER_ITEM_STATE_FREE; 567} 568 569static u32 brcmf_fws_hanger_get_free_slot(struct brcmf_fws_hanger *h) 570{ 571 u32 i; 572 573 i = (h->slot_pos + 1) % BRCMF_FWS_HANGER_MAXITEMS; 574 575 while (i != h->slot_pos) { 576 if (h->items[i].state == BRCMF_FWS_HANGER_ITEM_STATE_FREE) { 577 h->slot_pos = i; 578 goto done; 579 } 580 i++; 581 if (i == BRCMF_FWS_HANGER_MAXITEMS) 582 i = 0; 583 } 584 brcmf_err("all slots occupied\n"); 585 h->failed_slotfind++; 586 i = BRCMF_FWS_HANGER_MAXITEMS; 587done: 588 return i; 589} 590 591static int brcmf_fws_hanger_pushpkt(struct brcmf_fws_hanger *h, 592 struct sk_buff *pkt, u32 slot_id) 593{ 594 if (slot_id >= BRCMF_FWS_HANGER_MAXITEMS) 595 return -ENOENT; 596 597 if (h->items[slot_id].state != BRCMF_FWS_HANGER_ITEM_STATE_FREE) { 598 brcmf_err("slot is not free\n"); 599 h->failed_to_push++; 600 return -EINVAL; 601 } 602 603 h->items[slot_id].state = BRCMF_FWS_HANGER_ITEM_STATE_INUSE; 604 h->items[slot_id].pkt = pkt; 605 h->pushed++; 606 return 0; 607} 608 609static int brcmf_fws_hanger_poppkt(struct brcmf_fws_hanger *h, 610 u32 slot_id, struct sk_buff **pktout, 611 bool remove_item) 612{ 613 if (slot_id >= BRCMF_FWS_HANGER_MAXITEMS) 614 return -ENOENT; 615 616 if (h->items[slot_id].state == BRCMF_FWS_HANGER_ITEM_STATE_FREE) { 617 brcmf_err("entry not in use\n"); 618 h->failed_to_pop++; 619 return -EINVAL; 620 } 621 622 *pktout = h->items[slot_id].pkt; 623 if (remove_item) { 624 h->items[slot_id].state = BRCMF_FWS_HANGER_ITEM_STATE_FREE; 625 h->items[slot_id].pkt = NULL; 626 h->popped++; 627 } 628 return 0; 629} 630 631static int brcmf_fws_hanger_mark_suppressed(struct brcmf_fws_hanger *h, 632 u32 slot_id) 633{ 634 if (slot_id >= BRCMF_FWS_HANGER_MAXITEMS) 635 return -ENOENT; 636 637 if (h->items[slot_id].state == BRCMF_FWS_HANGER_ITEM_STATE_FREE) { 638 brcmf_err("entry not in use\n"); 639 return -EINVAL; 640 } 641 642 h->items[slot_id].state = BRCMF_FWS_HANGER_ITEM_STATE_INUSE_SUPPRESSED; 643 return 0; 644} 645 646static void brcmf_fws_hanger_cleanup(struct brcmf_fws_info *fws, 647 bool (*fn)(struct sk_buff *, void *), 648 int ifidx) 649{ 650 struct brcmf_fws_hanger *h = &fws->hanger; 651 struct sk_buff *skb; 652 int i; 653 enum brcmf_fws_hanger_item_state s; 654 655 for (i = 0; i < ARRAY_SIZE(h->items); i++) { 656 s = h->items[i].state; 657 if (s == BRCMF_FWS_HANGER_ITEM_STATE_INUSE || 658 s == BRCMF_FWS_HANGER_ITEM_STATE_INUSE_SUPPRESSED) { 659 skb = h->items[i].pkt; 660 if (fn == NULL || fn(skb, &ifidx)) { 661 /* suppress packets freed from psq */ 662 if (s == BRCMF_FWS_HANGER_ITEM_STATE_INUSE) 663 brcmu_pkt_buf_free_skb(skb); 664 h->items[i].state = 665 BRCMF_FWS_HANGER_ITEM_STATE_FREE; 666 } 667 } 668 } 669} 670 671static void brcmf_fws_macdesc_set_name(struct brcmf_fws_info *fws, 672 struct brcmf_fws_mac_descriptor *desc) 673{ 674 if (desc == &fws->desc.other) 675 strlcpy(desc->name, "MAC-OTHER", sizeof(desc->name)); 676 else if (desc->mac_handle) 677 scnprintf(desc->name, sizeof(desc->name), "MAC-%d:%d", 678 desc->mac_handle, desc->interface_id); 679 else 680 scnprintf(desc->name, sizeof(desc->name), "MACIF:%d", 681 desc->interface_id); 682} 683 684static void brcmf_fws_macdesc_init(struct brcmf_fws_mac_descriptor *desc, 685 u8 *addr, u8 ifidx) 686{ 687 brcmf_dbg(TRACE, 688 "enter: desc %p ea=%pM, ifidx=%u\n", desc, addr, ifidx); 689 desc->occupied = 1; 690 desc->state = BRCMF_FWS_STATE_OPEN; 691 desc->requested_credit = 0; 692 desc->requested_packet = 0; 693 /* depending on use may need ifp->bssidx instead */ 694 desc->interface_id = ifidx; 695 desc->ac_bitmap = 0xff; /* update this when handling APSD */ 696 if (addr) 697 memcpy(&desc->ea[0], addr, ETH_ALEN); 698} 699 700static 701void brcmf_fws_macdesc_deinit(struct brcmf_fws_mac_descriptor *desc) 702{ 703 brcmf_dbg(TRACE, 704 "enter: ea=%pM, ifidx=%u\n", desc->ea, desc->interface_id); 705 desc->occupied = 0; 706 desc->state = BRCMF_FWS_STATE_CLOSE; 707 desc->requested_credit = 0; 708 desc->requested_packet = 0; 709} 710 711static struct brcmf_fws_mac_descriptor * 712brcmf_fws_macdesc_lookup(struct brcmf_fws_info *fws, u8 *ea) 713{ 714 struct brcmf_fws_mac_descriptor *entry; 715 int i; 716 717 if (ea == NULL) 718 return ERR_PTR(-EINVAL); 719 720 entry = &fws->desc.nodes[0]; 721 for (i = 0; i < ARRAY_SIZE(fws->desc.nodes); i++) { 722 if (entry->occupied && !memcmp(entry->ea, ea, ETH_ALEN)) 723 return entry; 724 entry++; 725 } 726 727 return ERR_PTR(-ENOENT); 728} 729 730static struct brcmf_fws_mac_descriptor* 731brcmf_fws_macdesc_find(struct brcmf_fws_info *fws, struct brcmf_if *ifp, u8 *da) 732{ 733 struct brcmf_fws_mac_descriptor *entry = &fws->desc.other; 734 bool multicast; 735 736 multicast = is_multicast_ether_addr(da); 737 738 /* Multicast destination, STA and P2P clients get the interface entry. 739 * STA/GC gets the Mac Entry for TDLS destinations, TDLS destinations 740 * have their own entry. 741 */ 742 if (multicast && ifp->fws_desc) { 743 entry = ifp->fws_desc; 744 goto done; 745 } 746 747 entry = brcmf_fws_macdesc_lookup(fws, da); 748 if (IS_ERR(entry)) 749 entry = ifp->fws_desc; 750 751done: 752 return entry; 753} 754 755static bool brcmf_fws_macdesc_closed(struct brcmf_fws_info *fws, 756 struct brcmf_fws_mac_descriptor *entry, 757 int fifo) 758{ 759 struct brcmf_fws_mac_descriptor *if_entry; 760 bool closed; 761 762 /* for unique destination entries the related interface 763 * may be closed. 764 */ 765 if (entry->mac_handle) { 766 if_entry = &fws->desc.iface[entry->interface_id]; 767 if (if_entry->state == BRCMF_FWS_STATE_CLOSE) 768 return true; 769 } 770 /* an entry is closed when the state is closed and 771 * the firmware did not request anything. 772 */ 773 closed = entry->state == BRCMF_FWS_STATE_CLOSE && 774 !entry->requested_credit && !entry->requested_packet; 775 776 /* Or firmware does not allow traffic for given fifo */ 777 return closed || !(entry->ac_bitmap & BIT(fifo)); 778} 779 780static void brcmf_fws_macdesc_cleanup(struct brcmf_fws_info *fws, 781 struct brcmf_fws_mac_descriptor *entry, 782 int ifidx) 783{ 784 if (entry->occupied && (ifidx == -1 || ifidx == entry->interface_id)) { 785 brcmf_fws_psq_flush(fws, &entry->psq, ifidx); 786 entry->occupied = !!(entry->psq.len); 787 } 788} 789 790static void brcmf_fws_bus_txq_cleanup(struct brcmf_fws_info *fws, 791 bool (*fn)(struct sk_buff *, void *), 792 int ifidx) 793{ 794 struct brcmf_fws_hanger_item *hi; 795 struct pktq *txq; 796 struct sk_buff *skb; 797 int prec; 798 u32 hslot; 799 800 txq = brcmf_bus_gettxq(fws->drvr->bus_if); 801 if (IS_ERR(txq)) { 802 brcmf_dbg(TRACE, "no txq to clean up\n"); 803 return; 804 } 805 806 for (prec = 0; prec < txq->num_prec; prec++) { 807 skb = brcmu_pktq_pdeq_match(txq, prec, fn, &ifidx); 808 while (skb) { 809 hslot = brcmf_skb_htod_tag_get_field(skb, HSLOT); 810 hi = &fws->hanger.items[hslot]; 811 WARN_ON(skb != hi->pkt); 812 hi->state = BRCMF_FWS_HANGER_ITEM_STATE_FREE; 813 brcmu_pkt_buf_free_skb(skb); 814 skb = brcmu_pktq_pdeq_match(txq, prec, fn, &ifidx); 815 } 816 } 817} 818 819static void brcmf_fws_cleanup(struct brcmf_fws_info *fws, int ifidx) 820{ 821 int i; 822 struct brcmf_fws_mac_descriptor *table; 823 bool (*matchfn)(struct sk_buff *, void *) = NULL; 824 825 if (fws == NULL) 826 return; 827 828 if (ifidx != -1) 829 matchfn = brcmf_fws_ifidx_match; 830 831 /* cleanup individual nodes */ 832 table = &fws->desc.nodes[0]; 833 for (i = 0; i < ARRAY_SIZE(fws->desc.nodes); i++) 834 brcmf_fws_macdesc_cleanup(fws, &table[i], ifidx); 835 836 brcmf_fws_macdesc_cleanup(fws, &fws->desc.other, ifidx); 837 brcmf_fws_bus_txq_cleanup(fws, matchfn, ifidx); 838 brcmf_fws_hanger_cleanup(fws, matchfn, ifidx); 839} 840 841static u8 brcmf_fws_hdrpush(struct brcmf_fws_info *fws, struct sk_buff *skb) 842{ 843 struct brcmf_fws_mac_descriptor *entry = brcmf_skbcb(skb)->mac; 844 u8 *wlh; 845 u16 data_offset = 0; 846 u8 fillers; 847 __le32 pkttag = cpu_to_le32(brcmf_skbcb(skb)->htod); 848 __le16 pktseq = cpu_to_le16(brcmf_skbcb(skb)->htod_seq); 849 850 brcmf_dbg(TRACE, "enter: %s, idx=%d hslot=%d htod %X seq %X\n", 851 entry->name, brcmf_skb_if_flags_get_field(skb, INDEX), 852 (le32_to_cpu(pkttag) >> 8) & 0xffff, 853 brcmf_skbcb(skb)->htod, brcmf_skbcb(skb)->htod_seq); 854 if (entry->send_tim_signal) 855 data_offset += 2 + BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP_LEN; 856 if (BRCMF_FWS_MODE_GET_REUSESEQ(fws->mode)) 857 data_offset += BRCMF_FWS_TYPE_SEQ_LEN; 858 /* +2 is for Type[1] and Len[1] in TLV, plus TIM signal */ 859 data_offset += 2 + BRCMF_FWS_TYPE_PKTTAG_LEN; 860 fillers = round_up(data_offset, 4) - data_offset; 861 data_offset += fillers; 862 863 skb_push(skb, data_offset); 864 wlh = skb->data; 865 866 wlh[0] = BRCMF_FWS_TYPE_PKTTAG; 867 wlh[1] = BRCMF_FWS_TYPE_PKTTAG_LEN; 868 memcpy(&wlh[2], &pkttag, sizeof(pkttag)); 869 if (BRCMF_FWS_MODE_GET_REUSESEQ(fws->mode)) { 870 wlh[1] += BRCMF_FWS_TYPE_SEQ_LEN; 871 memcpy(&wlh[2 + BRCMF_FWS_TYPE_PKTTAG_LEN], &pktseq, 872 sizeof(pktseq)); 873 } 874 wlh += wlh[1] + 2; 875 876 if (entry->send_tim_signal) { 877 entry->send_tim_signal = 0; 878 wlh[0] = BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP; 879 wlh[1] = BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP_LEN; 880 wlh[2] = entry->mac_handle; 881 wlh[3] = entry->traffic_pending_bmp; 882 brcmf_dbg(TRACE, "adding TIM info: handle %d bmp 0x%X\n", 883 entry->mac_handle, entry->traffic_pending_bmp); 884 wlh += BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP_LEN + 2; 885 entry->traffic_lastreported_bmp = entry->traffic_pending_bmp; 886 } 887 if (fillers) 888 memset(wlh, BRCMF_FWS_TYPE_FILLER, fillers); 889 890 return (u8)(data_offset >> 2); 891} 892 893static bool brcmf_fws_tim_update(struct brcmf_fws_info *fws, 894 struct brcmf_fws_mac_descriptor *entry, 895 int fifo, bool send_immediately) 896{ 897 struct sk_buff *skb; 898 struct brcmf_skbuff_cb *skcb; 899 s32 err; 900 u32 len; 901 u8 data_offset; 902 int ifidx; 903 904 /* check delayedQ and suppressQ in one call using bitmap */ 905 if (brcmu_pktq_mlen(&entry->psq, 3 << (fifo * 2)) == 0) 906 entry->traffic_pending_bmp &= ~NBITVAL(fifo); 907 else 908 entry->traffic_pending_bmp |= NBITVAL(fifo); 909 910 entry->send_tim_signal = false; 911 if (entry->traffic_lastreported_bmp != entry->traffic_pending_bmp) 912 entry->send_tim_signal = true; 913 if (send_immediately && entry->send_tim_signal && 914 entry->state == BRCMF_FWS_STATE_CLOSE) { 915 /* create a dummy packet and sent that. The traffic */ 916 /* bitmap info will automatically be attached to that packet */ 917 len = BRCMF_FWS_TYPE_PKTTAG_LEN + 2 + 918 BRCMF_FWS_TYPE_SEQ_LEN + 919 BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP_LEN + 2 + 920 4 + fws->drvr->hdrlen; 921 skb = brcmu_pkt_buf_get_skb(len); 922 if (skb == NULL) 923 return false; 924 skb_pull(skb, len); 925 skcb = brcmf_skbcb(skb); 926 skcb->mac = entry; 927 skcb->state = BRCMF_FWS_SKBSTATE_TIM; 928 skcb->htod = 0; 929 skcb->htod_seq = 0; 930 data_offset = brcmf_fws_hdrpush(fws, skb); 931 ifidx = brcmf_skb_if_flags_get_field(skb, INDEX); 932 brcmf_fws_unlock(fws); 933 err = brcmf_proto_txdata(fws->drvr, ifidx, data_offset, skb); 934 brcmf_fws_lock(fws); 935 if (err) 936 brcmu_pkt_buf_free_skb(skb); 937 return true; 938 } 939 return false; 940} 941 942static void 943brcmf_fws_flow_control_check(struct brcmf_fws_info *fws, struct pktq *pq, 944 u8 if_id) 945{ 946 struct brcmf_if *ifp = fws->drvr->iflist[!if_id ? 0 : if_id + 1]; 947 948 if (WARN_ON(!ifp)) 949 return; 950 951 if ((ifp->netif_stop & BRCMF_NETIF_STOP_REASON_FWS_FC) && 952 pq->len <= BRCMF_FWS_FLOWCONTROL_LOWATER) 953 brcmf_txflowblock_if(ifp, 954 BRCMF_NETIF_STOP_REASON_FWS_FC, false); 955 if (!(ifp->netif_stop & BRCMF_NETIF_STOP_REASON_FWS_FC) && 956 pq->len >= BRCMF_FWS_FLOWCONTROL_HIWATER) { 957 fws->stats.fws_flow_block++; 958 brcmf_txflowblock_if(ifp, BRCMF_NETIF_STOP_REASON_FWS_FC, true); 959 } 960 return; 961} 962 963static int brcmf_fws_rssi_indicate(struct brcmf_fws_info *fws, s8 rssi) 964{ 965 brcmf_dbg(CTL, "rssi %d\n", rssi); 966 return 0; 967} 968 969static 970int brcmf_fws_macdesc_indicate(struct brcmf_fws_info *fws, u8 type, u8 *data) 971{ 972 struct brcmf_fws_mac_descriptor *entry, *existing; 973 u8 mac_handle; 974 u8 ifidx; 975 u8 *addr; 976 977 mac_handle = *data++; 978 ifidx = *data++; 979 addr = data; 980 981 entry = &fws->desc.nodes[mac_handle & 0x1F]; 982 if (type == BRCMF_FWS_TYPE_MACDESC_DEL) { 983 if (entry->occupied) { 984 brcmf_dbg(TRACE, "deleting %s mac %pM\n", 985 entry->name, addr); 986 brcmf_fws_lock(fws); 987 brcmf_fws_macdesc_cleanup(fws, entry, -1); 988 brcmf_fws_macdesc_deinit(entry); 989 brcmf_fws_unlock(fws); 990 } else 991 fws->stats.mac_update_failed++; 992 return 0; 993 } 994 995 existing = brcmf_fws_macdesc_lookup(fws, addr); 996 if (IS_ERR(existing)) { 997 if (!entry->occupied) { 998 brcmf_fws_lock(fws); 999 entry->mac_handle = mac_handle; 1000 brcmf_fws_macdesc_init(entry, addr, ifidx); 1001 brcmf_fws_macdesc_set_name(fws, entry); 1002 brcmu_pktq_init(&entry->psq, BRCMF_FWS_PSQ_PREC_COUNT, 1003 BRCMF_FWS_PSQ_LEN); 1004 brcmf_fws_unlock(fws); 1005 brcmf_dbg(TRACE, "add %s mac %pM\n", entry->name, addr); 1006 } else { 1007 fws->stats.mac_update_failed++; 1008 } 1009 } else { 1010 if (entry != existing) { 1011 brcmf_dbg(TRACE, "copy mac %s\n", existing->name); 1012 brcmf_fws_lock(fws); 1013 memcpy(entry, existing, 1014 offsetof(struct brcmf_fws_mac_descriptor, psq)); 1015 entry->mac_handle = mac_handle; 1016 brcmf_fws_macdesc_deinit(existing); 1017 brcmf_fws_macdesc_set_name(fws, entry); 1018 brcmf_fws_unlock(fws); 1019 brcmf_dbg(TRACE, "relocate %s mac %pM\n", entry->name, 1020 addr); 1021 } else { 1022 brcmf_dbg(TRACE, "use existing\n"); 1023 WARN_ON(entry->mac_handle != mac_handle); 1024 /* TODO: what should we do here: continue, reinit, .. */ 1025 } 1026 } 1027 return 0; 1028} 1029 1030static int brcmf_fws_macdesc_state_indicate(struct brcmf_fws_info *fws, 1031 u8 type, u8 *data) 1032{ 1033 struct brcmf_fws_mac_descriptor *entry; 1034 u8 mac_handle; 1035 int ret; 1036 1037 mac_handle = data[0]; 1038 entry = &fws->desc.nodes[mac_handle & 0x1F]; 1039 if (!entry->occupied) { 1040 fws->stats.mac_ps_update_failed++; 1041 return -ESRCH; 1042 } 1043 brcmf_fws_lock(fws); 1044 /* a state update should wipe old credits */ 1045 entry->requested_credit = 0; 1046 entry->requested_packet = 0; 1047 if (type == BRCMF_FWS_TYPE_MAC_OPEN) { 1048 entry->state = BRCMF_FWS_STATE_OPEN; 1049 ret = BRCMF_FWS_RET_OK_SCHEDULE; 1050 } else { 1051 entry->state = BRCMF_FWS_STATE_CLOSE; 1052 brcmf_fws_tim_update(fws, entry, BRCMF_FWS_FIFO_AC_BK, false); 1053 brcmf_fws_tim_update(fws, entry, BRCMF_FWS_FIFO_AC_BE, false); 1054 brcmf_fws_tim_update(fws, entry, BRCMF_FWS_FIFO_AC_VI, false); 1055 brcmf_fws_tim_update(fws, entry, BRCMF_FWS_FIFO_AC_VO, true); 1056 ret = BRCMF_FWS_RET_OK_NOSCHEDULE; 1057 } 1058 brcmf_fws_unlock(fws); 1059 return ret; 1060} 1061 1062static int brcmf_fws_interface_state_indicate(struct brcmf_fws_info *fws, 1063 u8 type, u8 *data) 1064{ 1065 struct brcmf_fws_mac_descriptor *entry; 1066 u8 ifidx; 1067 int ret; 1068 1069 ifidx = data[0]; 1070 1071 if (ifidx >= BRCMF_MAX_IFS) { 1072 ret = -ERANGE; 1073 goto fail; 1074 } 1075 1076 entry = &fws->desc.iface[ifidx]; 1077 if (!entry->occupied) { 1078 ret = -ESRCH; 1079 goto fail; 1080 } 1081 1082 brcmf_dbg(TRACE, "%s (%d): %s\n", brcmf_fws_get_tlv_name(type), type, 1083 entry->name); 1084 brcmf_fws_lock(fws); 1085 switch (type) { 1086 case BRCMF_FWS_TYPE_INTERFACE_OPEN: 1087 entry->state = BRCMF_FWS_STATE_OPEN; 1088 ret = BRCMF_FWS_RET_OK_SCHEDULE; 1089 break; 1090 case BRCMF_FWS_TYPE_INTERFACE_CLOSE: 1091 entry->state = BRCMF_FWS_STATE_CLOSE; 1092 ret = BRCMF_FWS_RET_OK_NOSCHEDULE; 1093 break; 1094 default: 1095 ret = -EINVAL; 1096 brcmf_fws_unlock(fws); 1097 goto fail; 1098 } 1099 brcmf_fws_unlock(fws); 1100 return ret; 1101 1102fail: 1103 fws->stats.if_update_failed++; 1104 return ret; 1105} 1106 1107static int brcmf_fws_request_indicate(struct brcmf_fws_info *fws, u8 type, 1108 u8 *data) 1109{ 1110 struct brcmf_fws_mac_descriptor *entry; 1111 1112 entry = &fws->desc.nodes[data[1] & 0x1F]; 1113 if (!entry->occupied) { 1114 if (type == BRCMF_FWS_TYPE_MAC_REQUEST_CREDIT) 1115 fws->stats.credit_request_failed++; 1116 else 1117 fws->stats.packet_request_failed++; 1118 return -ESRCH; 1119 } 1120 1121 brcmf_dbg(TRACE, "%s (%d): %s cnt %d bmp %d\n", 1122 brcmf_fws_get_tlv_name(type), type, entry->name, 1123 data[0], data[2]); 1124 brcmf_fws_lock(fws); 1125 if (type == BRCMF_FWS_TYPE_MAC_REQUEST_CREDIT) 1126 entry->requested_credit = data[0]; 1127 else 1128 entry->requested_packet = data[0]; 1129 1130 entry->ac_bitmap = data[2]; 1131 brcmf_fws_unlock(fws); 1132 return BRCMF_FWS_RET_OK_SCHEDULE; 1133} 1134 1135static void 1136brcmf_fws_macdesc_use_req_credit(struct brcmf_fws_mac_descriptor *entry, 1137 struct sk_buff *skb) 1138{ 1139 if (entry->requested_credit > 0) { 1140 entry->requested_credit--; 1141 brcmf_skb_if_flags_set_field(skb, REQUESTED, 1); 1142 brcmf_skb_if_flags_set_field(skb, REQ_CREDIT, 1); 1143 if (entry->state != BRCMF_FWS_STATE_CLOSE) 1144 brcmf_err("requested credit set while mac not closed!\n"); 1145 } else if (entry->requested_packet > 0) { 1146 entry->requested_packet--; 1147 brcmf_skb_if_flags_set_field(skb, REQUESTED, 1); 1148 brcmf_skb_if_flags_set_field(skb, REQ_CREDIT, 0); 1149 if (entry->state != BRCMF_FWS_STATE_CLOSE) 1150 brcmf_err("requested packet set while mac not closed!\n"); 1151 } else { 1152 brcmf_skb_if_flags_set_field(skb, REQUESTED, 0); 1153 brcmf_skb_if_flags_set_field(skb, REQ_CREDIT, 0); 1154 } 1155} 1156 1157static void brcmf_fws_macdesc_return_req_credit(struct sk_buff *skb) 1158{ 1159 struct brcmf_fws_mac_descriptor *entry = brcmf_skbcb(skb)->mac; 1160 1161 if ((brcmf_skb_if_flags_get_field(skb, REQ_CREDIT)) && 1162 (entry->state == BRCMF_FWS_STATE_CLOSE)) 1163 entry->requested_credit++; 1164} 1165 1166static void brcmf_fws_return_credits(struct brcmf_fws_info *fws, 1167 u8 fifo, u8 credits) 1168{ 1169 int lender_ac; 1170 int *borrowed; 1171 int *fifo_credit; 1172 1173 if (!credits) 1174 return; 1175 1176 fws->fifo_credit_map |= 1 << fifo; 1177 1178 if ((fifo == BRCMF_FWS_FIFO_AC_BE) && 1179 (fws->credits_borrowed[0])) { 1180 for (lender_ac = BRCMF_FWS_FIFO_AC_VO; lender_ac >= 0; 1181 lender_ac--) { 1182 borrowed = &fws->credits_borrowed[lender_ac]; 1183 if (*borrowed) { 1184 fws->fifo_credit_map |= (1 << lender_ac); 1185 fifo_credit = &fws->fifo_credit[lender_ac]; 1186 if (*borrowed >= credits) { 1187 *borrowed -= credits; 1188 *fifo_credit += credits; 1189 return; 1190 } else { 1191 credits -= *borrowed; 1192 *fifo_credit += *borrowed; 1193 *borrowed = 0; 1194 } 1195 } 1196 } 1197 } 1198 1199 fws->fifo_credit[fifo] += credits; 1200} 1201 1202static void brcmf_fws_schedule_deq(struct brcmf_fws_info *fws) 1203{ 1204 /* only schedule dequeue when there are credits for delayed traffic */ 1205 if ((fws->fifo_credit_map & fws->fifo_delay_map) || 1206 (!brcmf_fws_fc_active(fws) && fws->fifo_delay_map)) 1207 queue_work(fws->fws_wq, &fws->fws_dequeue_work); 1208} 1209 1210static int brcmf_fws_enq(struct brcmf_fws_info *fws, 1211 enum brcmf_fws_skb_state state, int fifo, 1212 struct sk_buff *p) 1213{ 1214 int prec = 2 * fifo; 1215 u32 *qfull_stat = &fws->stats.delayq_full_error; 1216 struct brcmf_fws_mac_descriptor *entry; 1217 struct pktq *pq; 1218 struct sk_buff_head *queue; 1219 struct sk_buff *p_head; 1220 struct sk_buff *p_tail; 1221 u32 fr_new; 1222 u32 fr_compare; 1223 1224 entry = brcmf_skbcb(p)->mac; 1225 if (entry == NULL) { 1226 brcmf_err("no mac descriptor found for skb %p\n", p); 1227 return -ENOENT; 1228 } 1229 1230 brcmf_dbg(DATA, "enter: fifo %d skb %p\n", fifo, p); 1231 if (state == BRCMF_FWS_SKBSTATE_SUPPRESSED) { 1232 prec += 1; 1233 qfull_stat = &fws->stats.supprq_full_error; 1234 1235 /* Fix out of order delivery of frames. Dont assume frame */ 1236 /* can be inserted at the end, but look for correct position */ 1237 pq = &entry->psq; 1238 if (pktq_full(pq) || pktq_pfull(pq, prec)) { 1239 *qfull_stat += 1; 1240 return -ENFILE; 1241 } 1242 queue = &pq->q[prec].skblist; 1243 1244 p_head = skb_peek(queue); 1245 p_tail = skb_peek_tail(queue); 1246 fr_new = brcmf_skb_htod_tag_get_field(p, FREERUN); 1247 1248 while (p_head != p_tail) { 1249 fr_compare = brcmf_skb_htod_tag_get_field(p_tail, 1250 FREERUN); 1251 /* be sure to handle wrap of 256 */ 1252 if (((fr_new > fr_compare) && 1253 ((fr_new - fr_compare) < 128)) || 1254 ((fr_new < fr_compare) && 1255 ((fr_compare - fr_new) > 128))) 1256 break; 1257 p_tail = skb_queue_prev(queue, p_tail); 1258 } 1259 /* Position found. Determine what to do */ 1260 if (p_tail == NULL) { 1261 /* empty list */ 1262 __skb_queue_tail(queue, p); 1263 } else { 1264 fr_compare = brcmf_skb_htod_tag_get_field(p_tail, 1265 FREERUN); 1266 if (((fr_new > fr_compare) && 1267 ((fr_new - fr_compare) < 128)) || 1268 ((fr_new < fr_compare) && 1269 ((fr_compare - fr_new) > 128))) { 1270 /* After tail */ 1271 __skb_queue_after(queue, p_tail, p); 1272 } else { 1273 /* Before tail */ 1274 __skb_insert(p, p_tail->prev, p_tail, queue); 1275 } 1276 } 1277 1278 /* Complete the counters and statistics */ 1279 pq->len++; 1280 if (pq->hi_prec < prec) 1281 pq->hi_prec = (u8) prec; 1282 } else if (brcmu_pktq_penq(&entry->psq, prec, p) == NULL) { 1283 *qfull_stat += 1; 1284 return -ENFILE; 1285 } 1286 1287 /* increment total enqueued packet count */ 1288 fws->fifo_delay_map |= 1 << fifo; 1289 fws->fifo_enqpkt[fifo]++; 1290 1291 /* update the sk_buff state */ 1292 brcmf_skbcb(p)->state = state; 1293 1294 /* 1295 * A packet has been pushed so update traffic 1296 * availability bitmap, if applicable 1297 */ 1298 brcmf_fws_tim_update(fws, entry, fifo, true); 1299 brcmf_fws_flow_control_check(fws, &entry->psq, 1300 brcmf_skb_if_flags_get_field(p, INDEX)); 1301 return 0; 1302} 1303 1304static struct sk_buff *brcmf_fws_deq(struct brcmf_fws_info *fws, int fifo) 1305{ 1306 struct brcmf_fws_mac_descriptor *table; 1307 struct brcmf_fws_mac_descriptor *entry; 1308 struct sk_buff *p; 1309 int num_nodes; 1310 int node_pos; 1311 int prec_out; 1312 int pmsk; 1313 int i; 1314 1315 table = (struct brcmf_fws_mac_descriptor *)&fws->desc; 1316 num_nodes = sizeof(fws->desc) / sizeof(struct brcmf_fws_mac_descriptor); 1317 node_pos = fws->deq_node_pos[fifo]; 1318 1319 for (i = 0; i < num_nodes; i++) { 1320 entry = &table[(node_pos + i) % num_nodes]; 1321 if (!entry->occupied || 1322 brcmf_fws_macdesc_closed(fws, entry, fifo)) 1323 continue; 1324 1325 if (entry->suppressed) 1326 pmsk = 2; 1327 else 1328 pmsk = 3; 1329 p = brcmu_pktq_mdeq(&entry->psq, pmsk << (fifo * 2), &prec_out); 1330 if (p == NULL) { 1331 if (entry->suppressed) { 1332 if (entry->suppr_transit_count) 1333 continue; 1334 entry->suppressed = false; 1335 p = brcmu_pktq_mdeq(&entry->psq, 1336 1 << (fifo * 2), &prec_out); 1337 } 1338 } 1339 if (p == NULL) 1340 continue; 1341 1342 brcmf_fws_macdesc_use_req_credit(entry, p); 1343 1344 /* move dequeue position to ensure fair round-robin */ 1345 fws->deq_node_pos[fifo] = (node_pos + i + 1) % num_nodes; 1346 brcmf_fws_flow_control_check(fws, &entry->psq, 1347 brcmf_skb_if_flags_get_field(p, 1348 INDEX) 1349 ); 1350 /* 1351 * A packet has been picked up, update traffic 1352 * availability bitmap, if applicable 1353 */ 1354 brcmf_fws_tim_update(fws, entry, fifo, false); 1355 1356 /* 1357 * decrement total enqueued fifo packets and 1358 * clear delay bitmap if done. 1359 */ 1360 fws->fifo_enqpkt[fifo]--; 1361 if (fws->fifo_enqpkt[fifo] == 0) 1362 fws->fifo_delay_map &= ~(1 << fifo); 1363 goto done; 1364 } 1365 p = NULL; 1366done: 1367 brcmf_dbg(DATA, "exit: fifo %d skb %p\n", fifo, p); 1368 return p; 1369} 1370 1371static int brcmf_fws_txstatus_suppressed(struct brcmf_fws_info *fws, int fifo, 1372 struct sk_buff *skb, u32 genbit, 1373 u16 seq) 1374{ 1375 struct brcmf_fws_mac_descriptor *entry = brcmf_skbcb(skb)->mac; 1376 u32 hslot; 1377 int ret; 1378 u8 ifidx; 1379 1380 hslot = brcmf_skb_htod_tag_get_field(skb, HSLOT); 1381 1382 /* this packet was suppressed */ 1383 if (!entry->suppressed) { 1384 entry->suppressed = true; 1385 entry->suppr_transit_count = entry->transit_count; 1386 brcmf_dbg(DATA, "suppress %s: transit %d\n", 1387 entry->name, entry->transit_count); 1388 } 1389 1390 entry->generation = genbit; 1391 1392 ret = brcmf_proto_hdrpull(fws->drvr, false, &ifidx, skb); 1393 if (ret == 0) { 1394 brcmf_skb_htod_tag_set_field(skb, GENERATION, genbit); 1395 brcmf_skbcb(skb)->htod_seq = seq; 1396 if (brcmf_skb_htod_seq_get_field(skb, FROMFW)) { 1397 brcmf_skb_htod_seq_set_field(skb, FROMDRV, 1); 1398 brcmf_skb_htod_seq_set_field(skb, FROMFW, 0); 1399 } else { 1400 brcmf_skb_htod_seq_set_field(skb, FROMDRV, 0); 1401 } 1402 ret = brcmf_fws_enq(fws, BRCMF_FWS_SKBSTATE_SUPPRESSED, fifo, 1403 skb); 1404 } 1405 1406 if (ret != 0) { 1407 /* suppress q is full or hdrpull failed, drop this packet */ 1408 brcmf_fws_hanger_poppkt(&fws->hanger, hslot, &skb, 1409 true); 1410 } else { 1411 /* 1412 * Mark suppressed to avoid a double free during 1413 * wlfc cleanup 1414 */ 1415 brcmf_fws_hanger_mark_suppressed(&fws->hanger, hslot); 1416 } 1417 1418 return ret; 1419} 1420 1421static int 1422brcmf_fws_txs_process(struct brcmf_fws_info *fws, u8 flags, u32 hslot, 1423 u32 genbit, u16 seq) 1424{ 1425 u32 fifo; 1426 int ret; 1427 bool remove_from_hanger = true; 1428 struct sk_buff *skb; 1429 struct brcmf_skbuff_cb *skcb; 1430 struct brcmf_fws_mac_descriptor *entry = NULL; 1431 1432 brcmf_dbg(DATA, "flags %d\n", flags); 1433 1434 if (flags == BRCMF_FWS_TXSTATUS_DISCARD) 1435 fws->stats.txs_discard++; 1436 else if (flags == BRCMF_FWS_TXSTATUS_CORE_SUPPRESS) { 1437 fws->stats.txs_supp_core++; 1438 remove_from_hanger = false; 1439 } else if (flags == BRCMF_FWS_TXSTATUS_FW_PS_SUPPRESS) { 1440 fws->stats.txs_supp_ps++; 1441 remove_from_hanger = false; 1442 } else if (flags == BRCMF_FWS_TXSTATUS_FW_TOSSED) 1443 fws->stats.txs_tossed++; 1444 else if (flags == BRCMF_FWS_TXSTATUS_HOST_TOSSED) 1445 fws->stats.txs_host_tossed++; 1446 else 1447 brcmf_err("unexpected txstatus\n"); 1448 1449 ret = brcmf_fws_hanger_poppkt(&fws->hanger, hslot, &skb, 1450 remove_from_hanger); 1451 if (ret != 0) { 1452 brcmf_err("no packet in hanger slot: hslot=%d\n", hslot); 1453 return ret; 1454 } 1455 1456 skcb = brcmf_skbcb(skb); 1457 entry = skcb->mac; 1458 if (WARN_ON(!entry)) { 1459 brcmu_pkt_buf_free_skb(skb); 1460 return -EINVAL; 1461 } 1462 entry->transit_count--; 1463 if (entry->suppressed && entry->suppr_transit_count) 1464 entry->suppr_transit_count--; 1465 1466 brcmf_dbg(DATA, "%s flags %d htod %X seq %X\n", entry->name, flags, 1467 skcb->htod, seq); 1468 1469 /* pick up the implicit credit from this packet */ 1470 fifo = brcmf_skb_htod_tag_get_field(skb, FIFO); 1471 if ((fws->fcmode == BRCMF_FWS_FCMODE_IMPLIED_CREDIT) || 1472 (brcmf_skb_if_flags_get_field(skb, REQ_CREDIT)) || 1473 (flags == BRCMF_FWS_TXSTATUS_HOST_TOSSED)) { 1474 brcmf_fws_return_credits(fws, fifo, 1); 1475 brcmf_fws_schedule_deq(fws); 1476 } 1477 brcmf_fws_macdesc_return_req_credit(skb); 1478 1479 if (!remove_from_hanger) 1480 ret = brcmf_fws_txstatus_suppressed(fws, fifo, skb, genbit, 1481 seq); 1482 1483 if (remove_from_hanger || ret) 1484 brcmf_txfinalize(fws->drvr, skb, true); 1485 1486 return 0; 1487} 1488 1489static int brcmf_fws_fifocreditback_indicate(struct brcmf_fws_info *fws, 1490 u8 *data) 1491{ 1492 int i; 1493 1494 if (fws->fcmode != BRCMF_FWS_FCMODE_EXPLICIT_CREDIT) { 1495 brcmf_dbg(INFO, "ignored\n"); 1496 return BRCMF_FWS_RET_OK_NOSCHEDULE; 1497 } 1498 1499 brcmf_dbg(DATA, "enter: data %pM\n", data); 1500 brcmf_fws_lock(fws); 1501 for (i = 0; i < BRCMF_FWS_FIFO_COUNT; i++) 1502 brcmf_fws_return_credits(fws, i, data[i]); 1503 1504 brcmf_dbg(DATA, "map: credit %x delay %x\n", fws->fifo_credit_map, 1505 fws->fifo_delay_map); 1506 brcmf_fws_unlock(fws); 1507 return BRCMF_FWS_RET_OK_SCHEDULE; 1508} 1509 1510static int brcmf_fws_txstatus_indicate(struct brcmf_fws_info *fws, u8 *data) 1511{ 1512 __le32 status_le; 1513 __le16 seq_le; 1514 u32 status; 1515 u32 hslot; 1516 u32 genbit; 1517 u8 flags; 1518 u16 seq; 1519 1520 fws->stats.txs_indicate++; 1521 memcpy(&status_le, data, sizeof(status_le)); 1522 status = le32_to_cpu(status_le); 1523 flags = brcmf_txstatus_get_field(status, FLAGS); 1524 hslot = brcmf_txstatus_get_field(status, HSLOT); 1525 genbit = brcmf_txstatus_get_field(status, GENERATION); 1526 if (BRCMF_FWS_MODE_GET_REUSESEQ(fws->mode)) { 1527 memcpy(&seq_le, &data[BRCMF_FWS_TYPE_PKTTAG_LEN], 1528 sizeof(seq_le)); 1529 seq = le16_to_cpu(seq_le); 1530 } else { 1531 seq = 0; 1532 } 1533 1534 brcmf_fws_lock(fws); 1535 brcmf_fws_txs_process(fws, flags, hslot, genbit, seq); 1536 brcmf_fws_unlock(fws); 1537 return BRCMF_FWS_RET_OK_NOSCHEDULE; 1538} 1539 1540static int brcmf_fws_dbg_seqnum_check(struct brcmf_fws_info *fws, u8 *data) 1541{ 1542 __le32 timestamp; 1543 1544 memcpy(×tamp, &data[2], sizeof(timestamp)); 1545 brcmf_dbg(CTL, "received: seq %d, timestamp %d\n", data[1], 1546 le32_to_cpu(timestamp)); 1547 return 0; 1548} 1549 1550static int brcmf_fws_notify_credit_map(struct brcmf_if *ifp, 1551 const struct brcmf_event_msg *e, 1552 void *data) 1553{ 1554 struct brcmf_fws_info *fws = ifp->drvr->fws; 1555 int i; 1556 u8 *credits = data; 1557 1558 if (e->datalen < BRCMF_FWS_FIFO_COUNT) { 1559 brcmf_err("event payload too small (%d)\n", e->datalen); 1560 return -EINVAL; 1561 } 1562 if (fws->creditmap_received) 1563 return 0; 1564 1565 fws->creditmap_received = true; 1566 1567 brcmf_dbg(TRACE, "enter: credits %pM\n", credits); 1568 brcmf_fws_lock(fws); 1569 for (i = 0; i < ARRAY_SIZE(fws->fifo_credit); i++) { 1570 if (*credits) 1571 fws->fifo_credit_map |= 1 << i; 1572 else 1573 fws->fifo_credit_map &= ~(1 << i); 1574 fws->fifo_credit[i] = *credits++; 1575 } 1576 brcmf_fws_schedule_deq(fws); 1577 brcmf_fws_unlock(fws); 1578 return 0; 1579} 1580 1581static int brcmf_fws_notify_bcmc_credit_support(struct brcmf_if *ifp, 1582 const struct brcmf_event_msg *e, 1583 void *data) 1584{ 1585 struct brcmf_fws_info *fws = ifp->drvr->fws; 1586 1587 brcmf_fws_lock(fws); 1588 if (fws) 1589 fws->bcmc_credit_check = true; 1590 brcmf_fws_unlock(fws); 1591 return 0; 1592} 1593 1594int brcmf_fws_hdrpull(struct brcmf_pub *drvr, int ifidx, s16 signal_len, 1595 struct sk_buff *skb) 1596{ 1597 struct brcmf_skb_reorder_data *rd; 1598 struct brcmf_fws_info *fws = drvr->fws; 1599 u8 *signal_data; 1600 s16 data_len; 1601 u8 type; 1602 u8 len; 1603 u8 *data; 1604 s32 status; 1605 s32 err; 1606 1607 brcmf_dbg(HDRS, "enter: ifidx %d, skblen %u, sig %d\n", 1608 ifidx, skb->len, signal_len); 1609 1610 WARN_ON(signal_len > skb->len); 1611 1612 if (!signal_len) 1613 return 0; 1614 /* if flow control disabled, skip to packet data and leave */ 1615 if (!fws->fw_signals) { 1616 skb_pull(skb, signal_len); 1617 return 0; 1618 } 1619 1620 fws->stats.header_pulls++; 1621 data_len = signal_len; 1622 signal_data = skb->data; 1623 1624 status = BRCMF_FWS_RET_OK_NOSCHEDULE; 1625 while (data_len > 0) { 1626 /* extract tlv info */ 1627 type = signal_data[0]; 1628 1629 /* FILLER type is actually not a TLV, but 1630 * a single byte that can be skipped. 1631 */ 1632 if (type == BRCMF_FWS_TYPE_FILLER) { 1633 signal_data += 1; 1634 data_len -= 1; 1635 continue; 1636 } 1637 len = signal_data[1]; 1638 data = signal_data + 2; 1639 1640 brcmf_dbg(HDRS, "tlv type=%s (%d), len=%d (%d)\n", 1641 brcmf_fws_get_tlv_name(type), type, len, 1642 brcmf_fws_get_tlv_len(fws, type)); 1643 1644 /* abort parsing when length invalid */ 1645 if (data_len < len + 2) 1646 break; 1647 1648 if (len < brcmf_fws_get_tlv_len(fws, type)) 1649 break; 1650 1651 err = BRCMF_FWS_RET_OK_NOSCHEDULE; 1652 switch (type) { 1653 case BRCMF_FWS_TYPE_COMP_TXSTATUS: 1654 break; 1655 case BRCMF_FWS_TYPE_HOST_REORDER_RXPKTS: 1656 rd = (struct brcmf_skb_reorder_data *)skb->cb; 1657 rd->reorder = data; 1658 break; 1659 case BRCMF_FWS_TYPE_MACDESC_ADD: 1660 case BRCMF_FWS_TYPE_MACDESC_DEL: 1661 brcmf_fws_macdesc_indicate(fws, type, data); 1662 break; 1663 case BRCMF_FWS_TYPE_MAC_OPEN: 1664 case BRCMF_FWS_TYPE_MAC_CLOSE: 1665 err = brcmf_fws_macdesc_state_indicate(fws, type, data); 1666 break; 1667 case BRCMF_FWS_TYPE_INTERFACE_OPEN: 1668 case BRCMF_FWS_TYPE_INTERFACE_CLOSE: 1669 err = brcmf_fws_interface_state_indicate(fws, type, 1670 data); 1671 break; 1672 case BRCMF_FWS_TYPE_MAC_REQUEST_CREDIT: 1673 case BRCMF_FWS_TYPE_MAC_REQUEST_PACKET: 1674 err = brcmf_fws_request_indicate(fws, type, data); 1675 break; 1676 case BRCMF_FWS_TYPE_TXSTATUS: 1677 brcmf_fws_txstatus_indicate(fws, data); 1678 break; 1679 case BRCMF_FWS_TYPE_FIFO_CREDITBACK: 1680 err = brcmf_fws_fifocreditback_indicate(fws, data); 1681 break; 1682 case BRCMF_FWS_TYPE_RSSI: 1683 brcmf_fws_rssi_indicate(fws, *data); 1684 break; 1685 case BRCMF_FWS_TYPE_TRANS_ID: 1686 brcmf_fws_dbg_seqnum_check(fws, data); 1687 break; 1688 case BRCMF_FWS_TYPE_PKTTAG: 1689 case BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP: 1690 default: 1691 fws->stats.tlv_invalid_type++; 1692 break; 1693 } 1694 if (err == BRCMF_FWS_RET_OK_SCHEDULE) 1695 status = BRCMF_FWS_RET_OK_SCHEDULE; 1696 signal_data += len + 2; 1697 data_len -= len + 2; 1698 } 1699 1700 if (data_len != 0) 1701 fws->stats.tlv_parse_failed++; 1702 1703 if (status == BRCMF_FWS_RET_OK_SCHEDULE) 1704 brcmf_fws_schedule_deq(fws); 1705 1706 /* signalling processing result does 1707 * not affect the actual ethernet packet. 1708 */ 1709 skb_pull(skb, signal_len); 1710 1711 /* this may be a signal-only packet 1712 */ 1713 if (skb->len == 0) 1714 fws->stats.header_only_pkt++; 1715 1716 return 0; 1717} 1718 1719static u8 brcmf_fws_precommit_skb(struct brcmf_fws_info *fws, int fifo, 1720 struct sk_buff *p) 1721{ 1722 struct brcmf_skbuff_cb *skcb = brcmf_skbcb(p); 1723 struct brcmf_fws_mac_descriptor *entry = skcb->mac; 1724 u8 flags; 1725 1726 if (skcb->state != BRCMF_FWS_SKBSTATE_SUPPRESSED) 1727 brcmf_skb_htod_tag_set_field(p, GENERATION, entry->generation); 1728 flags = BRCMF_FWS_HTOD_FLAG_PKTFROMHOST; 1729 if (brcmf_skb_if_flags_get_field(p, REQUESTED)) { 1730 /* 1731 * Indicate that this packet is being sent in response to an 1732 * explicit request from the firmware side. 1733 */ 1734 flags |= BRCMF_FWS_HTOD_FLAG_PKT_REQUESTED; 1735 } 1736 brcmf_skb_htod_tag_set_field(p, FLAGS, flags); 1737 return brcmf_fws_hdrpush(fws, p); 1738} 1739 1740static void brcmf_fws_rollback_toq(struct brcmf_fws_info *fws, 1741 struct sk_buff *skb, int fifo) 1742{ 1743 struct brcmf_fws_mac_descriptor *entry; 1744 struct sk_buff *pktout; 1745 int qidx, hslot; 1746 int rc = 0; 1747 1748 entry = brcmf_skbcb(skb)->mac; 1749 if (entry->occupied) { 1750 qidx = 2 * fifo; 1751 if (brcmf_skbcb(skb)->state == BRCMF_FWS_SKBSTATE_SUPPRESSED) 1752 qidx++; 1753 1754 pktout = brcmu_pktq_penq_head(&entry->psq, qidx, skb); 1755 if (pktout == NULL) { 1756 brcmf_err("%s queue %d full\n", entry->name, qidx); 1757 rc = -ENOSPC; 1758 } 1759 } else { 1760 brcmf_err("%s entry removed\n", entry->name); 1761 rc = -ENOENT; 1762 } 1763 1764 if (rc) { 1765 fws->stats.rollback_failed++; 1766 hslot = brcmf_skb_htod_tag_get_field(skb, HSLOT); 1767 brcmf_fws_txs_process(fws, BRCMF_FWS_TXSTATUS_HOST_TOSSED, 1768 hslot, 0, 0); 1769 } else { 1770 fws->stats.rollback_success++; 1771 brcmf_fws_return_credits(fws, fifo, 1); 1772 brcmf_fws_macdesc_return_req_credit(skb); 1773 } 1774} 1775 1776static int brcmf_fws_borrow_credit(struct brcmf_fws_info *fws) 1777{ 1778 int lender_ac; 1779 1780 if (time_after(fws->borrow_defer_timestamp, jiffies)) { 1781 fws->fifo_credit_map &= ~(1 << BRCMF_FWS_FIFO_AC_BE); 1782 return -ENAVAIL; 1783 } 1784 1785 for (lender_ac = 0; lender_ac <= BRCMF_FWS_FIFO_AC_VO; lender_ac++) { 1786 if (fws->fifo_credit[lender_ac]) { 1787 fws->credits_borrowed[lender_ac]++; 1788 fws->fifo_credit[lender_ac]--; 1789 if (fws->fifo_credit[lender_ac] == 0) 1790 fws->fifo_credit_map &= ~(1 << lender_ac); 1791 fws->fifo_credit_map |= (1 << BRCMF_FWS_FIFO_AC_BE); 1792 brcmf_dbg(DATA, "borrow credit from: %d\n", lender_ac); 1793 return 0; 1794 } 1795 } 1796 fws->fifo_credit_map &= ~(1 << BRCMF_FWS_FIFO_AC_BE); 1797 return -ENAVAIL; 1798} 1799 1800static int brcmf_fws_commit_skb(struct brcmf_fws_info *fws, int fifo, 1801 struct sk_buff *skb) 1802{ 1803 struct brcmf_skbuff_cb *skcb = brcmf_skbcb(skb); 1804 struct brcmf_fws_mac_descriptor *entry; 1805 int rc; 1806 u8 ifidx; 1807 u8 data_offset; 1808 1809 entry = skcb->mac; 1810 if (IS_ERR(entry)) 1811 return PTR_ERR(entry); 1812 1813 data_offset = brcmf_fws_precommit_skb(fws, fifo, skb); 1814 entry->transit_count++; 1815 if (entry->suppressed) 1816 entry->suppr_transit_count++; 1817 ifidx = brcmf_skb_if_flags_get_field(skb, INDEX); 1818 brcmf_fws_unlock(fws); 1819 rc = brcmf_proto_txdata(fws->drvr, ifidx, data_offset, skb); 1820 brcmf_fws_lock(fws); 1821 brcmf_dbg(DATA, "%s flags %X htod %X bus_tx %d\n", entry->name, 1822 skcb->if_flags, skcb->htod, rc); 1823 if (rc < 0) { 1824 entry->transit_count--; 1825 if (entry->suppressed) 1826 entry->suppr_transit_count--; 1827 brcmf_proto_hdrpull(fws->drvr, false, &ifidx, skb); 1828 goto rollback; 1829 } 1830 1831 fws->stats.pkt2bus++; 1832 fws->stats.send_pkts[fifo]++; 1833 if (brcmf_skb_if_flags_get_field(skb, REQUESTED)) 1834 fws->stats.requested_sent[fifo]++; 1835 1836 return rc; 1837 1838rollback: 1839 brcmf_fws_rollback_toq(fws, skb, fifo); 1840 return rc; 1841} 1842 1843static int brcmf_fws_assign_htod(struct brcmf_fws_info *fws, struct sk_buff *p, 1844 int fifo) 1845{ 1846 struct brcmf_skbuff_cb *skcb = brcmf_skbcb(p); 1847 int rc, hslot; 1848 1849 skcb->htod = 0; 1850 skcb->htod_seq = 0; 1851 hslot = brcmf_fws_hanger_get_free_slot(&fws->hanger); 1852 brcmf_skb_htod_tag_set_field(p, HSLOT, hslot); 1853 brcmf_skb_htod_tag_set_field(p, FREERUN, skcb->mac->seq[fifo]); 1854 brcmf_skb_htod_tag_set_field(p, FIFO, fifo); 1855 rc = brcmf_fws_hanger_pushpkt(&fws->hanger, p, hslot); 1856 if (!rc) 1857 skcb->mac->seq[fifo]++; 1858 else 1859 fws->stats.generic_error++; 1860 return rc; 1861} 1862 1863int brcmf_fws_process_skb(struct brcmf_if *ifp, struct sk_buff *skb) 1864{ 1865 struct brcmf_pub *drvr = ifp->drvr; 1866 struct brcmf_fws_info *fws = drvr->fws; 1867 struct brcmf_skbuff_cb *skcb = brcmf_skbcb(skb); 1868 struct ethhdr *eh = (struct ethhdr *)(skb->data); 1869 int fifo = BRCMF_FWS_FIFO_BCMC; 1870 bool multicast = is_multicast_ether_addr(eh->h_dest); 1871 bool pae = eh->h_proto == htons(ETH_P_PAE); 1872 1873 brcmf_dbg(DATA, "tx proto=0x%X\n", ntohs(eh->h_proto)); 1874 /* determine the priority */ 1875 if (!skb->priority) 1876 skb->priority = cfg80211_classify8021d(skb); 1877 1878 drvr->tx_multicast += !!multicast; 1879 if (pae) 1880 atomic_inc(&ifp->pend_8021x_cnt); 1881 1882 /* set control buffer information */ 1883 skcb->if_flags = 0; 1884 skcb->state = BRCMF_FWS_SKBSTATE_NEW; 1885 brcmf_skb_if_flags_set_field(skb, INDEX, ifp->ifidx); 1886 if (!multicast) 1887 fifo = brcmf_fws_prio2fifo[skb->priority]; 1888 1889 brcmf_fws_lock(fws); 1890 if (fifo != BRCMF_FWS_FIFO_AC_BE && fifo < BRCMF_FWS_FIFO_BCMC) 1891 fws->borrow_defer_timestamp = jiffies + 1892 BRCMF_FWS_BORROW_DEFER_PERIOD; 1893 1894 skcb->mac = brcmf_fws_macdesc_find(fws, ifp, eh->h_dest); 1895 brcmf_dbg(DATA, "%s mac %pM multi %d fifo %d\n", skcb->mac->name, 1896 eh->h_dest, multicast, fifo); 1897 if (!brcmf_fws_assign_htod(fws, skb, fifo)) { 1898 brcmf_fws_enq(fws, BRCMF_FWS_SKBSTATE_DELAYED, fifo, skb); 1899 brcmf_fws_schedule_deq(fws); 1900 } else { 1901 brcmf_err("drop skb: no hanger slot\n"); 1902 if (pae) { 1903 atomic_dec(&ifp->pend_8021x_cnt); 1904 if (waitqueue_active(&ifp->pend_8021x_wait)) 1905 wake_up(&ifp->pend_8021x_wait); 1906 } 1907 brcmu_pkt_buf_free_skb(skb); 1908 } 1909 brcmf_fws_unlock(fws); 1910 return 0; 1911} 1912 1913void brcmf_fws_reset_interface(struct brcmf_if *ifp) 1914{ 1915 struct brcmf_fws_mac_descriptor *entry = ifp->fws_desc; 1916 1917 brcmf_dbg(TRACE, "enter: idx=%d\n", ifp->bssidx); 1918 if (!entry) 1919 return; 1920 1921 brcmf_fws_macdesc_init(entry, ifp->mac_addr, ifp->ifidx); 1922} 1923 1924void brcmf_fws_add_interface(struct brcmf_if *ifp) 1925{ 1926 struct brcmf_fws_info *fws = ifp->drvr->fws; 1927 struct brcmf_fws_mac_descriptor *entry; 1928 1929 if (!ifp->ndev) 1930 return; 1931 1932 entry = &fws->desc.iface[ifp->ifidx]; 1933 ifp->fws_desc = entry; 1934 brcmf_fws_macdesc_init(entry, ifp->mac_addr, ifp->ifidx); 1935 brcmf_fws_macdesc_set_name(fws, entry); 1936 brcmu_pktq_init(&entry->psq, BRCMF_FWS_PSQ_PREC_COUNT, 1937 BRCMF_FWS_PSQ_LEN); 1938 brcmf_dbg(TRACE, "added %s\n", entry->name); 1939} 1940 1941void brcmf_fws_del_interface(struct brcmf_if *ifp) 1942{ 1943 struct brcmf_fws_mac_descriptor *entry = ifp->fws_desc; 1944 1945 if (!entry) 1946 return; 1947 1948 brcmf_fws_lock(ifp->drvr->fws); 1949 ifp->fws_desc = NULL; 1950 brcmf_dbg(TRACE, "deleting %s\n", entry->name); 1951 brcmf_fws_macdesc_deinit(entry); 1952 brcmf_fws_cleanup(ifp->drvr->fws, ifp->ifidx); 1953 brcmf_fws_unlock(ifp->drvr->fws); 1954} 1955 1956static void brcmf_fws_dequeue_worker(struct work_struct *worker) 1957{ 1958 struct brcmf_fws_info *fws; 1959 struct brcmf_pub *drvr; 1960 struct sk_buff *skb; 1961 int fifo; 1962 u32 hslot; 1963 u32 ifidx; 1964 int ret; 1965 1966 fws = container_of(worker, struct brcmf_fws_info, fws_dequeue_work); 1967 drvr = fws->drvr; 1968 1969 brcmf_fws_lock(fws); 1970 for (fifo = BRCMF_FWS_FIFO_BCMC; fifo >= 0 && !fws->bus_flow_blocked; 1971 fifo--) { 1972 if (!brcmf_fws_fc_active(fws)) { 1973 while ((skb = brcmf_fws_deq(fws, fifo)) != NULL) { 1974 hslot = brcmf_skb_htod_tag_get_field(skb, 1975 HSLOT); 1976 brcmf_fws_hanger_poppkt(&fws->hanger, hslot, 1977 &skb, true); 1978 ifidx = brcmf_skb_if_flags_get_field(skb, 1979 INDEX); 1980 /* Use proto layer to send data frame */ 1981 brcmf_fws_unlock(fws); 1982 ret = brcmf_proto_txdata(drvr, ifidx, 0, skb); 1983 brcmf_fws_lock(fws); 1984 if (ret < 0) 1985 brcmf_txfinalize(drvr, skb, false); 1986 if (fws->bus_flow_blocked) 1987 break; 1988 } 1989 continue; 1990 } 1991 while ((fws->fifo_credit[fifo]) || ((!fws->bcmc_credit_check) && 1992 (fifo == BRCMF_FWS_FIFO_BCMC))) { 1993 skb = brcmf_fws_deq(fws, fifo); 1994 if (!skb) 1995 break; 1996 fws->fifo_credit[fifo]--; 1997 if (brcmf_fws_commit_skb(fws, fifo, skb)) 1998 break; 1999 if (fws->bus_flow_blocked) 2000 break; 2001 } 2002 if ((fifo == BRCMF_FWS_FIFO_AC_BE) && 2003 (fws->fifo_credit[fifo] == 0) && 2004 (!fws->bus_flow_blocked)) { 2005 while (brcmf_fws_borrow_credit(fws) == 0) { 2006 skb = brcmf_fws_deq(fws, fifo); 2007 if (!skb) { 2008 brcmf_fws_return_credits(fws, fifo, 1); 2009 break; 2010 } 2011 if (brcmf_fws_commit_skb(fws, fifo, skb)) 2012 break; 2013 if (fws->bus_flow_blocked) 2014 break; 2015 } 2016 } 2017 } 2018 brcmf_fws_unlock(fws); 2019} 2020 2021int brcmf_fws_init(struct brcmf_pub *drvr) 2022{ 2023 struct brcmf_fws_info *fws; 2024 u32 tlv = BRCMF_FWS_FLAGS_RSSI_SIGNALS; 2025 int rc; 2026 u32 mode; 2027 2028 drvr->fws = kzalloc(sizeof(*(drvr->fws)), GFP_KERNEL); 2029 if (!drvr->fws) { 2030 rc = -ENOMEM; 2031 goto fail; 2032 } 2033 2034 fws = drvr->fws; 2035 2036 spin_lock_init(&fws->spinlock); 2037 2038 /* set linkage back */ 2039 fws->drvr = drvr; 2040 fws->fcmode = fcmode; 2041 2042 fws->fws_wq = create_singlethread_workqueue("brcmf_fws_wq"); 2043 if (fws->fws_wq == NULL) { 2044 brcmf_err("workqueue creation failed\n"); 2045 rc = -EBADF; 2046 goto fail; 2047 } 2048 INIT_WORK(&fws->fws_dequeue_work, brcmf_fws_dequeue_worker); 2049 2050 /* enable firmware signalling if fcmode active */ 2051 if (fws->fcmode != BRCMF_FWS_FCMODE_NONE) 2052 tlv |= BRCMF_FWS_FLAGS_XONXOFF_SIGNALS | 2053 BRCMF_FWS_FLAGS_CREDIT_STATUS_SIGNALS | 2054 BRCMF_FWS_FLAGS_HOST_PROPTXSTATUS_ACTIVE | 2055 BRCMF_FWS_FLAGS_HOST_RXREORDER_ACTIVE; 2056 2057 rc = brcmf_fweh_register(drvr, BRCMF_E_FIFO_CREDIT_MAP, 2058 brcmf_fws_notify_credit_map); 2059 if (rc < 0) { 2060 brcmf_err("register credit map handler failed\n"); 2061 goto fail; 2062 } 2063 rc = brcmf_fweh_register(drvr, BRCMF_E_BCMC_CREDIT_SUPPORT, 2064 brcmf_fws_notify_bcmc_credit_support); 2065 if (rc < 0) { 2066 brcmf_err("register bcmc credit handler failed\n"); 2067 brcmf_fweh_unregister(drvr, BRCMF_E_FIFO_CREDIT_MAP); 2068 goto fail; 2069 } 2070 2071 /* Setting the iovar may fail if feature is unsupported 2072 * so leave the rc as is so driver initialization can 2073 * continue. Set mode back to none indicating not enabled. 2074 */ 2075 fws->fw_signals = true; 2076 if (brcmf_fil_iovar_int_set(drvr->iflist[0], "tlv", tlv)) { 2077 brcmf_err("failed to set bdcv2 tlv signaling\n"); 2078 fws->fcmode = BRCMF_FWS_FCMODE_NONE; 2079 fws->fw_signals = false; 2080 } 2081 2082 if (brcmf_fil_iovar_int_set(drvr->iflist[0], "ampdu_hostreorder", 1)) 2083 brcmf_dbg(INFO, "enabling AMPDU host-reorder failed\n"); 2084 2085 /* Enable seq number reuse, if supported */ 2086 if (brcmf_fil_iovar_int_get(drvr->iflist[0], "wlfc_mode", &mode) == 0) { 2087 if (BRCMF_FWS_MODE_GET_REUSESEQ(mode)) { 2088 mode = 0; 2089 BRCMF_FWS_MODE_SET_REUSESEQ(mode, 1); 2090 if (brcmf_fil_iovar_int_set(drvr->iflist[0], 2091 "wlfc_mode", mode) == 0) { 2092 BRCMF_FWS_MODE_SET_REUSESEQ(fws->mode, 1); 2093 } 2094 } 2095 } 2096 2097 brcmf_fws_hanger_init(&fws->hanger); 2098 brcmf_fws_macdesc_init(&fws->desc.other, NULL, 0); 2099 brcmf_fws_macdesc_set_name(fws, &fws->desc.other); 2100 brcmu_pktq_init(&fws->desc.other.psq, BRCMF_FWS_PSQ_PREC_COUNT, 2101 BRCMF_FWS_PSQ_LEN); 2102 2103 /* create debugfs file for statistics */ 2104 brcmf_debugfs_create_fws_stats(drvr, &fws->stats); 2105 2106 brcmf_dbg(INFO, "%s bdcv2 tlv signaling [%x]\n", 2107 fws->fw_signals ? "enabled" : "disabled", tlv); 2108 return 0; 2109 2110fail: 2111 brcmf_fws_deinit(drvr); 2112 return rc; 2113} 2114 2115void brcmf_fws_deinit(struct brcmf_pub *drvr) 2116{ 2117 struct brcmf_fws_info *fws = drvr->fws; 2118 2119 if (!fws) 2120 return; 2121 2122 if (drvr->fws->fws_wq) 2123 destroy_workqueue(drvr->fws->fws_wq); 2124 2125 /* cleanup */ 2126 brcmf_fws_lock(fws); 2127 brcmf_fws_cleanup(fws, -1); 2128 drvr->fws = NULL; 2129 brcmf_fws_unlock(fws); 2130 2131 /* free top structure */ 2132 kfree(fws); 2133} 2134 2135bool brcmf_fws_fc_active(struct brcmf_fws_info *fws) 2136{ 2137 if (!fws->creditmap_received) 2138 return false; 2139 2140 return fws->fcmode != BRCMF_FWS_FCMODE_NONE; 2141} 2142 2143void brcmf_fws_bustxfail(struct brcmf_fws_info *fws, struct sk_buff *skb) 2144{ 2145 u32 hslot; 2146 2147 if (brcmf_skbcb(skb)->state == BRCMF_FWS_SKBSTATE_TIM) { 2148 brcmu_pkt_buf_free_skb(skb); 2149 return; 2150 } 2151 brcmf_fws_lock(fws); 2152 hslot = brcmf_skb_htod_tag_get_field(skb, HSLOT); 2153 brcmf_fws_txs_process(fws, BRCMF_FWS_TXSTATUS_HOST_TOSSED, hslot, 0, 0); 2154 brcmf_fws_unlock(fws); 2155} 2156 2157void brcmf_fws_bus_blocked(struct brcmf_pub *drvr, bool flow_blocked) 2158{ 2159 struct brcmf_fws_info *fws = drvr->fws; 2160 2161 fws->bus_flow_blocked = flow_blocked; 2162 if (!flow_blocked) 2163 brcmf_fws_schedule_deq(fws); 2164 else 2165 fws->stats.bus_flow_block++; 2166} 2167