drivers/net/wireless/brcm80211/brcmfmac/fwsignal.c

   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,
  78 enum 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),
  89 enum 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 },
 100 static 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
 109 static 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
 120 static 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  */
 175 enum 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  */
 195 struct 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  */
 322 enum 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  */
 347 enum 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
 355 enum brcmf_fws_fcmode {
 356         BRCMF_FWS_FCMODE_NONE,
 357         BRCMF_FWS_FCMODE_IMPLIED_CREDIT,
 358         BRCMF_FWS_FCMODE_EXPLICIT_CREDIT
 359 };
 360
 361 enum 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  */
 382 struct 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  */
 412 enum 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  */
 425 struct 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  */
 441 struct 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
 451 struct 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
 457 struct 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  */
 484 static 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
 495 static int fcmode;
 496 module_param(fcmode, int, S_IRUSR);
 497 MODULE_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  */
 511 static 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
 524 static void brcmf_fws_lock(struct brcmf_fws_info *fws)
 525                 __acquires(&fws->spinlock)
 526 {
 527         spin_lock_irqsave(&fws->spinlock, fws->flags);
 528 }
 529
 530 static void brcmf_fws_unlock(struct brcmf_fws_info *fws)
 531                 __releases(&fws->spinlock)
 532 {
 533         spin_unlock_irqrestore(&fws->spinlock, fws->flags);
 534 }
 535
 536 static 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
 542 static 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
 560 static 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
 569 static 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;
 587 done:
 588         return i;
 589 }
 590
 591 static 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
 609 static 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
 631 static 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
 646 static 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
 671 static 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
 684 static 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
 700 static
 701 void 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
 711 static struct brcmf_fws_mac_descriptor *
 712 brcmf_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
 730 static struct brcmf_fws_mac_descriptor*
 731 brcmf_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
 751 done:
 752         return entry;
 753 }
 754
 755 static 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
 780 static 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
 790 static 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
 819 static 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
 841 static 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
 893 static 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
 942 static void
 943 brcmf_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
 963 static 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
 969 static
 970 int 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
1030 static 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
1062 static 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
1102 fail:
1103         fws->stats.if_update_failed++;
1104         return ret;
1105 }
1106
1107 static 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
1135 static void
1136 brcmf_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
1157 static 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
1166 static 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
1202 static 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
1210 static 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
1304 static 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;
1366 done:
1367         brcmf_dbg(DATA, "exit: fifo %d skb %p\n", fifo, p);
1368         return p;
1369 }
1370
1371 static 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
1421 static int
1422 brcmf_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
1489 static 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
1510 static 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
1540 static int brcmf_fws_dbg_seqnum_check(struct brcmf_fws_info *fws, u8 *data)
1541 {
1542         __le32 timestamp;
1543
1544         memcpy(&timestamp, &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
1550 static 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
1581 static 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
1594 int 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
1719 static 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
1740 static 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
1776 static 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
1800 static 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
1838 rollback:
1839         brcmf_fws_rollback_toq(fws, skb, fifo);
1840         return rc;
1841 }
1842
1843 static 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
1863 int 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, NULL);
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
1913 void 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
1924 void 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
1941 void 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
1956 static 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
2021 int 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
2110 fail:
2111         brcmf_fws_deinit(drvr);
2112         return rc;
2113 }
2114
2115 void 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
2135 bool 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
2143 void 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
2157 void 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 }