drivers/net/wireless/broadcom/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 "core.h"
  30 #include "debug.h"
  31 #include "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 "cfg80211.h"
  38 #include "proto.h"
  39 #include "common.h"
  40
  41 /**
  42  * DOC: Firmware Signalling
  43  *
  44  * Firmware can send signals to host and vice versa, which are passed in the
  45  * data packets using TLV based header. This signalling layer is on top of the
  46  * BDC bus protocol layer.
  47  */
  48
  49 /*
  50  * single definition for firmware-driver flow control tlv's.
  51  *
  52  * each tlv is specified by BRCMF_FWS_TLV_DEF(name, ID, length).
  53  * A length value 0 indicates variable length tlv.
  54  */
  55 #define BRCMF_FWS_TLV_DEFLIST \
  56         BRCMF_FWS_TLV_DEF(MAC_OPEN, 1, 1) \
  57         BRCMF_FWS_TLV_DEF(MAC_CLOSE, 2, 1) \
  58         BRCMF_FWS_TLV_DEF(MAC_REQUEST_CREDIT, 3, 2) \
  59         BRCMF_FWS_TLV_DEF(TXSTATUS, 4, 4) \
  60         BRCMF_FWS_TLV_DEF(PKTTAG, 5, 4) \
  61         BRCMF_FWS_TLV_DEF(MACDESC_ADD,  6, 8) \
  62         BRCMF_FWS_TLV_DEF(MACDESC_DEL, 7, 8) \
  63         BRCMF_FWS_TLV_DEF(RSSI, 8, 1) \
  64         BRCMF_FWS_TLV_DEF(INTERFACE_OPEN, 9, 1) \
  65         BRCMF_FWS_TLV_DEF(INTERFACE_CLOSE, 10, 1) \
  66         BRCMF_FWS_TLV_DEF(FIFO_CREDITBACK, 11, 6) \
  67         BRCMF_FWS_TLV_DEF(PENDING_TRAFFIC_BMP, 12, 2) \
  68         BRCMF_FWS_TLV_DEF(MAC_REQUEST_PACKET, 13, 3) \
  69         BRCMF_FWS_TLV_DEF(HOST_REORDER_RXPKTS, 14, 10) \
  70         BRCMF_FWS_TLV_DEF(TRANS_ID, 18, 6) \
  71         BRCMF_FWS_TLV_DEF(COMP_TXSTATUS, 19, 1) \
  72         BRCMF_FWS_TLV_DEF(FILLER, 255, 0)
  73
  74 /*
  75  * enum brcmf_fws_tlv_type - definition of tlv identifiers.
  76  */
  77 #define BRCMF_FWS_TLV_DEF(name, id, len) \
  78         BRCMF_FWS_TYPE_ ## name =  id,
  79 enum brcmf_fws_tlv_type {
  80         BRCMF_FWS_TLV_DEFLIST
  81         BRCMF_FWS_TYPE_INVALID
  82 };
  83 #undef BRCMF_FWS_TLV_DEF
  84
  85 /*
  86  * enum brcmf_fws_tlv_len - definition of tlv lengths.
  87  */
  88 #define BRCMF_FWS_TLV_DEF(name, id, len) \
  89         BRCMF_FWS_TYPE_ ## name ## _LEN = (len),
  90 enum brcmf_fws_tlv_len {
  91         BRCMF_FWS_TLV_DEFLIST
  92 };
  93 #undef BRCMF_FWS_TLV_DEF
  94
  95 /* AMPDU rx reordering definitions */
  96 #define BRCMF_RXREORDER_FLOWID_OFFSET           0
  97 #define BRCMF_RXREORDER_MAXIDX_OFFSET           2
  98 #define BRCMF_RXREORDER_FLAGS_OFFSET            4
  99 #define BRCMF_RXREORDER_CURIDX_OFFSET           6
 100 #define BRCMF_RXREORDER_EXPIDX_OFFSET           8
 101
 102 #define BRCMF_RXREORDER_DEL_FLOW                0x01
 103 #define BRCMF_RXREORDER_FLUSH_ALL               0x02
 104 #define BRCMF_RXREORDER_CURIDX_VALID            0x04
 105 #define BRCMF_RXREORDER_EXPIDX_VALID            0x08
 106 #define BRCMF_RXREORDER_NEW_HOLE                0x10
 107
 108 #ifdef DEBUG
 109 /*
 110  * brcmf_fws_tlv_names - array of tlv names.
 111  */
 112 #define BRCMF_FWS_TLV_DEF(name, id, len) \
 113         { id, #name },
 114 static struct {
 115         enum brcmf_fws_tlv_type id;
 116         const char *name;
 117 } brcmf_fws_tlv_names[] = {
 118         BRCMF_FWS_TLV_DEFLIST
 119 };
 120 #undef BRCMF_FWS_TLV_DEF
 121
 122
 123 static const char *brcmf_fws_get_tlv_name(enum brcmf_fws_tlv_type id)
 124 {
 125         int i;
 126
 127         for (i = 0; i < ARRAY_SIZE(brcmf_fws_tlv_names); i++)
 128                 if (brcmf_fws_tlv_names[i].id == id)
 129                         return brcmf_fws_tlv_names[i].name;
 130
 131         return "INVALID";
 132 }
 133 #else
 134 static const char *brcmf_fws_get_tlv_name(enum brcmf_fws_tlv_type id)
 135 {
 136         return "NODEBUG";
 137 }
 138 #endif /* DEBUG */
 139
 140 /*
 141  * The PKTTAG tlv has additional bytes when firmware-signalling
 142  * mode has REUSESEQ flag set.
 143  */
 144 #define BRCMF_FWS_TYPE_SEQ_LEN                          2
 145
 146 /*
 147  * flags used to enable tlv signalling from firmware.
 148  */
 149 #define BRCMF_FWS_FLAGS_RSSI_SIGNALS                    0x0001
 150 #define BRCMF_FWS_FLAGS_XONXOFF_SIGNALS                 0x0002
 151 #define BRCMF_FWS_FLAGS_CREDIT_STATUS_SIGNALS           0x0004
 152 #define BRCMF_FWS_FLAGS_HOST_PROPTXSTATUS_ACTIVE        0x0008
 153 #define BRCMF_FWS_FLAGS_PSQ_GENERATIONFSM_ENABLE        0x0010
 154 #define BRCMF_FWS_FLAGS_PSQ_ZERO_BUFFER_ENABLE          0x0020
 155 #define BRCMF_FWS_FLAGS_HOST_RXREORDER_ACTIVE           0x0040
 156
 157 #define BRCMF_FWS_MAC_DESC_TABLE_SIZE                   32
 158 #define BRCMF_FWS_MAC_DESC_ID_INVALID                   0xff
 159
 160 #define BRCMF_FWS_HOSTIF_FLOWSTATE_OFF                  0
 161 #define BRCMF_FWS_HOSTIF_FLOWSTATE_ON                   1
 162 #define BRCMF_FWS_FLOWCONTROL_HIWATER                   128
 163 #define BRCMF_FWS_FLOWCONTROL_LOWATER                   64
 164
 165 #define BRCMF_FWS_PSQ_PREC_COUNT                ((BRCMF_FWS_FIFO_COUNT + 1) * 2)
 166 #define BRCMF_FWS_PSQ_LEN                               256
 167
 168 #define BRCMF_FWS_HTOD_FLAG_PKTFROMHOST                 0x01
 169 #define BRCMF_FWS_HTOD_FLAG_PKT_REQUESTED               0x02
 170
 171 #define BRCMF_FWS_RET_OK_NOSCHEDULE                     0
 172 #define BRCMF_FWS_RET_OK_SCHEDULE                       1
 173
 174 #define BRCMF_FWS_MODE_REUSESEQ_SHIFT                   3       /* seq reuse */
 175 #define BRCMF_FWS_MODE_SET_REUSESEQ(x, val)     ((x) = \
 176                 ((x) & ~(1 << BRCMF_FWS_MODE_REUSESEQ_SHIFT)) | \
 177                 (((val) & 1) << BRCMF_FWS_MODE_REUSESEQ_SHIFT))
 178 #define BRCMF_FWS_MODE_GET_REUSESEQ(x)  \
 179                 (((x) >> BRCMF_FWS_MODE_REUSESEQ_SHIFT) & 1)
 180
 181 /**
 182  * enum brcmf_fws_skb_state - indicates processing state of skb.
 183  *
 184  * @BRCMF_FWS_SKBSTATE_NEW: sk_buff is newly arrived in the driver.
 185  * @BRCMF_FWS_SKBSTATE_DELAYED: sk_buff had to wait on queue.
 186  * @BRCMF_FWS_SKBSTATE_SUPPRESSED: sk_buff has been suppressed by firmware.
 187  * @BRCMF_FWS_SKBSTATE_TIM: allocated for TIM update info.
 188  */
 189 enum brcmf_fws_skb_state {
 190         BRCMF_FWS_SKBSTATE_NEW,
 191         BRCMF_FWS_SKBSTATE_DELAYED,
 192         BRCMF_FWS_SKBSTATE_SUPPRESSED,
 193         BRCMF_FWS_SKBSTATE_TIM
 194 };
 195
 196 /**
 197  * struct brcmf_skbuff_cb - control buffer associated with skbuff.
 198  *
 199  * @bus_flags: 2 bytes reserved for bus specific parameters
 200  * @if_flags: holds interface index and packet related flags.
 201  * @htod: host to device packet identifier (used in PKTTAG tlv).
 202  * @htod_seq: this 16-bit is original seq number for every suppress packet.
 203  * @state: transmit state of the packet.
 204  * @mac: descriptor related to destination for this packet.
 205  *
 206  * This information is stored in control buffer struct sk_buff::cb, which
 207  * provides 48 bytes of storage so this structure should not exceed that.
 208  */
 209 struct brcmf_skbuff_cb {
 210         u16 bus_flags;
 211         u16 if_flags;
 212         u32 htod;
 213         u16 htod_seq;
 214         enum brcmf_fws_skb_state state;
 215         struct brcmf_fws_mac_descriptor *mac;
 216 };
 217
 218 /*
 219  * macro casting skbuff control buffer to struct brcmf_skbuff_cb.
 220  */
 221 #define brcmf_skbcb(skb)        ((struct brcmf_skbuff_cb *)((skb)->cb))
 222
 223 /*
 224  * sk_buff control if flags
 225  *
 226  *      b[11]  - packet sent upon firmware request.
 227  *      b[10]  - packet only contains signalling data.
 228  *      b[9]   - packet is a tx packet.
 229  *      b[8]   - packet used requested credit
 230  *      b[7]   - interface in AP mode.
 231  *      b[3:0] - interface index.
 232  */
 233 #define BRCMF_SKB_IF_FLAGS_REQUESTED_MASK       0x0800
 234 #define BRCMF_SKB_IF_FLAGS_REQUESTED_SHIFT      11
 235 #define BRCMF_SKB_IF_FLAGS_SIGNAL_ONLY_MASK     0x0400
 236 #define BRCMF_SKB_IF_FLAGS_SIGNAL_ONLY_SHIFT    10
 237 #define BRCMF_SKB_IF_FLAGS_TRANSMIT_MASK        0x0200
 238 #define BRCMF_SKB_IF_FLAGS_TRANSMIT_SHIFT       9
 239 #define BRCMF_SKB_IF_FLAGS_REQ_CREDIT_MASK      0x0100
 240 #define BRCMF_SKB_IF_FLAGS_REQ_CREDIT_SHIFT     8
 241 #define BRCMF_SKB_IF_FLAGS_IF_AP_MASK           0x0080
 242 #define BRCMF_SKB_IF_FLAGS_IF_AP_SHIFT          7
 243 #define BRCMF_SKB_IF_FLAGS_INDEX_MASK           0x000f
 244 #define BRCMF_SKB_IF_FLAGS_INDEX_SHIFT          0
 245
 246 #define brcmf_skb_if_flags_set_field(skb, field, value) \
 247         brcmu_maskset16(&(brcmf_skbcb(skb)->if_flags), \
 248                         BRCMF_SKB_IF_FLAGS_ ## field ## _MASK, \
 249                         BRCMF_SKB_IF_FLAGS_ ## field ## _SHIFT, (value))
 250 #define brcmf_skb_if_flags_get_field(skb, field) \
 251         brcmu_maskget16(brcmf_skbcb(skb)->if_flags, \
 252                         BRCMF_SKB_IF_FLAGS_ ## field ## _MASK, \
 253                         BRCMF_SKB_IF_FLAGS_ ## field ## _SHIFT)
 254
 255 /*
 256  * sk_buff control packet identifier
 257  *
 258  * 32-bit packet identifier used in PKTTAG tlv from host to dongle.
 259  *
 260  * - Generated at the host (e.g. dhd)
 261  * - Seen as a generic sequence number by firmware except for the flags field.
 262  *
 263  * Generation   : b[31] => generation number for this packet [host->fw]
 264  *                         OR, current generation number [fw->host]
 265  * Flags        : b[30:27] => command, status flags
 266  * FIFO-AC      : b[26:24] => AC-FIFO id
 267  * h-slot       : b[23:8] => hanger-slot
 268  * freerun      : b[7:0] => A free running counter
 269  */
 270 #define BRCMF_SKB_HTOD_TAG_GENERATION_MASK              0x80000000
 271 #define BRCMF_SKB_HTOD_TAG_GENERATION_SHIFT             31
 272 #define BRCMF_SKB_HTOD_TAG_FLAGS_MASK                   0x78000000
 273 #define BRCMF_SKB_HTOD_TAG_FLAGS_SHIFT                  27
 274 #define BRCMF_SKB_HTOD_TAG_FIFO_MASK                    0x07000000
 275 #define BRCMF_SKB_HTOD_TAG_FIFO_SHIFT                   24
 276 #define BRCMF_SKB_HTOD_TAG_HSLOT_MASK                   0x00ffff00
 277 #define BRCMF_SKB_HTOD_TAG_HSLOT_SHIFT                  8
 278 #define BRCMF_SKB_HTOD_TAG_FREERUN_MASK                 0x000000ff
 279 #define BRCMF_SKB_HTOD_TAG_FREERUN_SHIFT                0
 280
 281 #define brcmf_skb_htod_tag_set_field(skb, field, value) \
 282         brcmu_maskset32(&(brcmf_skbcb(skb)->htod), \
 283                         BRCMF_SKB_HTOD_TAG_ ## field ## _MASK, \
 284                         BRCMF_SKB_HTOD_TAG_ ## field ## _SHIFT, (value))
 285 #define brcmf_skb_htod_tag_get_field(skb, field) \
 286         brcmu_maskget32(brcmf_skbcb(skb)->htod, \
 287                         BRCMF_SKB_HTOD_TAG_ ## field ## _MASK, \
 288                         BRCMF_SKB_HTOD_TAG_ ## field ## _SHIFT)
 289
 290 #define BRCMF_SKB_HTOD_SEQ_FROMFW_MASK                  0x2000
 291 #define BRCMF_SKB_HTOD_SEQ_FROMFW_SHIFT                 13
 292 #define BRCMF_SKB_HTOD_SEQ_FROMDRV_MASK                 0x1000
 293 #define BRCMF_SKB_HTOD_SEQ_FROMDRV_SHIFT                12
 294 #define BRCMF_SKB_HTOD_SEQ_NR_MASK                      0x0fff
 295 #define BRCMF_SKB_HTOD_SEQ_NR_SHIFT                     0
 296
 297 #define brcmf_skb_htod_seq_set_field(skb, field, value) \
 298         brcmu_maskset16(&(brcmf_skbcb(skb)->htod_seq), \
 299                         BRCMF_SKB_HTOD_SEQ_ ## field ## _MASK, \
 300                         BRCMF_SKB_HTOD_SEQ_ ## field ## _SHIFT, (value))
 301 #define brcmf_skb_htod_seq_get_field(skb, field) \
 302         brcmu_maskget16(brcmf_skbcb(skb)->htod_seq, \
 303                         BRCMF_SKB_HTOD_SEQ_ ## field ## _MASK, \
 304                         BRCMF_SKB_HTOD_SEQ_ ## field ## _SHIFT)
 305
 306 #define BRCMF_FWS_TXSTAT_GENERATION_MASK        0x80000000
 307 #define BRCMF_FWS_TXSTAT_GENERATION_SHIFT       31
 308 #define BRCMF_FWS_TXSTAT_FLAGS_MASK             0x78000000
 309 #define BRCMF_FWS_TXSTAT_FLAGS_SHIFT            27
 310 #define BRCMF_FWS_TXSTAT_FIFO_MASK              0x07000000
 311 #define BRCMF_FWS_TXSTAT_FIFO_SHIFT             24
 312 #define BRCMF_FWS_TXSTAT_HSLOT_MASK             0x00FFFF00
 313 #define BRCMF_FWS_TXSTAT_HSLOT_SHIFT            8
 314 #define BRCMF_FWS_TXSTAT_FREERUN_MASK           0x000000FF
 315 #define BRCMF_FWS_TXSTAT_FREERUN_SHIFT          0
 316
 317 #define brcmf_txstatus_get_field(txs, field) \
 318         brcmu_maskget32(txs, BRCMF_FWS_TXSTAT_ ## field ## _MASK, \
 319                         BRCMF_FWS_TXSTAT_ ## field ## _SHIFT)
 320
 321 /* How long to defer borrowing in jiffies */
 322 #define BRCMF_FWS_BORROW_DEFER_PERIOD           (HZ / 10)
 323
 324 /**
 325  * enum brcmf_fws_fifo - fifo indices used by dongle firmware.
 326  *
 327  * @BRCMF_FWS_FIFO_FIRST: first fifo, ie. background.
 328  * @BRCMF_FWS_FIFO_AC_BK: fifo for background traffic.
 329  * @BRCMF_FWS_FIFO_AC_BE: fifo for best-effort traffic.
 330  * @BRCMF_FWS_FIFO_AC_VI: fifo for video traffic.
 331  * @BRCMF_FWS_FIFO_AC_VO: fifo for voice traffic.
 332  * @BRCMF_FWS_FIFO_BCMC: fifo for broadcast/multicast (AP only).
 333  * @BRCMF_FWS_FIFO_ATIM: fifo for ATIM (AP only).
 334  * @BRCMF_FWS_FIFO_COUNT: number of fifos.
 335  */
 336 enum brcmf_fws_fifo {
 337         BRCMF_FWS_FIFO_FIRST,
 338         BRCMF_FWS_FIFO_AC_BK = BRCMF_FWS_FIFO_FIRST,
 339         BRCMF_FWS_FIFO_AC_BE,
 340         BRCMF_FWS_FIFO_AC_VI,
 341         BRCMF_FWS_FIFO_AC_VO,
 342         BRCMF_FWS_FIFO_BCMC,
 343         BRCMF_FWS_FIFO_ATIM,
 344         BRCMF_FWS_FIFO_COUNT
 345 };
 346
 347 /**
 348  * enum brcmf_fws_txstatus - txstatus flag values.
 349  *
 350  * @BRCMF_FWS_TXSTATUS_DISCARD:
 351  *      host is free to discard the packet.
 352  * @BRCMF_FWS_TXSTATUS_CORE_SUPPRESS:
 353  *      802.11 core suppressed the packet.
 354  * @BRCMF_FWS_TXSTATUS_FW_PS_SUPPRESS:
 355  *      firmware suppress the packet as device is already in PS mode.
 356  * @BRCMF_FWS_TXSTATUS_FW_TOSSED:
 357  *      firmware tossed the packet.
 358  * @BRCMF_FWS_TXSTATUS_HOST_TOSSED:
 359  *      host tossed the packet.
 360  */
 361 enum brcmf_fws_txstatus {
 362         BRCMF_FWS_TXSTATUS_DISCARD,
 363         BRCMF_FWS_TXSTATUS_CORE_SUPPRESS,
 364         BRCMF_FWS_TXSTATUS_FW_PS_SUPPRESS,
 365         BRCMF_FWS_TXSTATUS_FW_TOSSED,
 366         BRCMF_FWS_TXSTATUS_HOST_TOSSED
 367 };
 368
 369 enum brcmf_fws_fcmode {
 370         BRCMF_FWS_FCMODE_NONE,
 371         BRCMF_FWS_FCMODE_IMPLIED_CREDIT,
 372         BRCMF_FWS_FCMODE_EXPLICIT_CREDIT
 373 };
 374
 375 enum brcmf_fws_mac_desc_state {
 376         BRCMF_FWS_STATE_OPEN = 1,
 377         BRCMF_FWS_STATE_CLOSE
 378 };
 379
 380 /**
 381  * struct brcmf_fws_mac_descriptor - firmware signalling data per node/interface
 382  *
 383  * @occupied: slot is in use.
 384  * @mac_handle: handle for mac entry determined by firmware.
 385  * @interface_id: interface index.
 386  * @state: current state.
 387  * @suppressed: mac entry is suppressed.
 388  * @generation: generation bit.
 389  * @ac_bitmap: ac queue bitmap.
 390  * @requested_credit: credits requested by firmware.
 391  * @ea: ethernet address.
 392  * @seq: per-node free-running sequence.
 393  * @psq: power-save queue.
 394  * @transit_count: packet in transit to firmware.
 395  */
 396 struct brcmf_fws_mac_descriptor {
 397         char name[16];
 398         u8 occupied;
 399         u8 mac_handle;
 400         u8 interface_id;
 401         u8 state;
 402         bool suppressed;
 403         u8 generation;
 404         u8 ac_bitmap;
 405         u8 requested_credit;
 406         u8 requested_packet;
 407         u8 ea[ETH_ALEN];
 408         u8 seq[BRCMF_FWS_FIFO_COUNT];
 409         struct pktq psq;
 410         int transit_count;
 411         int suppr_transit_count;
 412         bool send_tim_signal;
 413         u8 traffic_pending_bmp;
 414         u8 traffic_lastreported_bmp;
 415 };
 416
 417 #define BRCMF_FWS_HANGER_MAXITEMS       1024
 418
 419 /**
 420  * enum brcmf_fws_hanger_item_state - state of hanger item.
 421  *
 422  * @BRCMF_FWS_HANGER_ITEM_STATE_FREE: item is free for use.
 423  * @BRCMF_FWS_HANGER_ITEM_STATE_INUSE: item is in use.
 424  * @BRCMF_FWS_HANGER_ITEM_STATE_INUSE_SUPPRESSED: item was suppressed.
 425  */
 426 enum brcmf_fws_hanger_item_state {
 427         BRCMF_FWS_HANGER_ITEM_STATE_FREE = 1,
 428         BRCMF_FWS_HANGER_ITEM_STATE_INUSE,
 429         BRCMF_FWS_HANGER_ITEM_STATE_INUSE_SUPPRESSED
 430 };
 431
 432
 433 /**
 434  * struct brcmf_fws_hanger_item - single entry for tx pending packet.
 435  *
 436  * @state: entry is either free or occupied.
 437  * @pkt: packet itself.
 438  */
 439 struct brcmf_fws_hanger_item {
 440         enum brcmf_fws_hanger_item_state state;
 441         struct sk_buff *pkt;
 442 };
 443
 444 /**
 445  * struct brcmf_fws_hanger - holds packets awaiting firmware txstatus.
 446  *
 447  * @pushed: packets pushed to await txstatus.
 448  * @popped: packets popped upon handling txstatus.
 449  * @failed_to_push: packets that could not be pushed.
 450  * @failed_to_pop: packets that could not be popped.
 451  * @failed_slotfind: packets for which failed to find an entry.
 452  * @slot_pos: last returned item index for a free entry.
 453  * @items: array of hanger items.
 454  */
 455 struct brcmf_fws_hanger {
 456         u32 pushed;
 457         u32 popped;
 458         u32 failed_to_push;
 459         u32 failed_to_pop;
 460         u32 failed_slotfind;
 461         u32 slot_pos;
 462         struct brcmf_fws_hanger_item items[BRCMF_FWS_HANGER_MAXITEMS];
 463 };
 464
 465 struct brcmf_fws_macdesc_table {
 466         struct brcmf_fws_mac_descriptor nodes[BRCMF_FWS_MAC_DESC_TABLE_SIZE];
 467         struct brcmf_fws_mac_descriptor iface[BRCMF_MAX_IFS];
 468         struct brcmf_fws_mac_descriptor other;
 469 };
 470
 471 struct brcmf_fws_stats {
 472         u32 tlv_parse_failed;
 473         u32 tlv_invalid_type;
 474         u32 header_only_pkt;
 475         u32 header_pulls;
 476         u32 pkt2bus;
 477         u32 send_pkts[5];
 478         u32 requested_sent[5];
 479         u32 generic_error;
 480         u32 mac_update_failed;
 481         u32 mac_ps_update_failed;
 482         u32 if_update_failed;
 483         u32 packet_request_failed;
 484         u32 credit_request_failed;
 485         u32 rollback_success;
 486         u32 rollback_failed;
 487         u32 delayq_full_error;
 488         u32 supprq_full_error;
 489         u32 txs_indicate;
 490         u32 txs_discard;
 491         u32 txs_supp_core;
 492         u32 txs_supp_ps;
 493         u32 txs_tossed;
 494         u32 txs_host_tossed;
 495         u32 bus_flow_block;
 496         u32 fws_flow_block;
 497 };
 498
 499 struct brcmf_fws_info {
 500         struct brcmf_pub *drvr;
 501         spinlock_t spinlock;
 502         ulong flags;
 503         struct brcmf_fws_stats stats;
 504         struct brcmf_fws_hanger hanger;
 505         enum brcmf_fws_fcmode fcmode;
 506         bool fw_signals;
 507         bool bcmc_credit_check;
 508         struct brcmf_fws_macdesc_table desc;
 509         struct workqueue_struct *fws_wq;
 510         struct work_struct fws_dequeue_work;
 511         u32 fifo_enqpkt[BRCMF_FWS_FIFO_COUNT];
 512         int fifo_credit[BRCMF_FWS_FIFO_COUNT];
 513         int credits_borrowed[BRCMF_FWS_FIFO_AC_VO + 1];
 514         int deq_node_pos[BRCMF_FWS_FIFO_COUNT];
 515         u32 fifo_credit_map;
 516         u32 fifo_delay_map;
 517         unsigned long borrow_defer_timestamp;
 518         bool bus_flow_blocked;
 519         bool creditmap_received;
 520         u8 mode;
 521         bool avoid_queueing;
 522 };
 523
 524 /*
 525  * brcmf_fws_prio2fifo - mapping from 802.1d priority to firmware fifo index.
 526  */
 527 static const int brcmf_fws_prio2fifo[] = {
 528         BRCMF_FWS_FIFO_AC_BE,
 529         BRCMF_FWS_FIFO_AC_BK,
 530         BRCMF_FWS_FIFO_AC_BK,
 531         BRCMF_FWS_FIFO_AC_BE,
 532         BRCMF_FWS_FIFO_AC_VI,
 533         BRCMF_FWS_FIFO_AC_VI,
 534         BRCMF_FWS_FIFO_AC_VO,
 535         BRCMF_FWS_FIFO_AC_VO
 536 };
 537
 538 #define BRCMF_FWS_TLV_DEF(name, id, len) \
 539         case BRCMF_FWS_TYPE_ ## name: \
 540                 return len;
 541
 542 /**
 543  * brcmf_fws_get_tlv_len() - returns defined length for given tlv id.
 544  *
 545  * @fws: firmware-signalling information.
 546  * @id: identifier of the TLV.
 547  *
 548  * Return: the specified length for the given TLV; Otherwise -EINVAL.
 549  */
 550 static int brcmf_fws_get_tlv_len(struct brcmf_fws_info *fws,
 551                                  enum brcmf_fws_tlv_type id)
 552 {
 553         switch (id) {
 554         BRCMF_FWS_TLV_DEFLIST
 555         default:
 556                 fws->stats.tlv_invalid_type++;
 557                 break;
 558         }
 559         return -EINVAL;
 560 }
 561 #undef BRCMF_FWS_TLV_DEF
 562
 563 static void brcmf_fws_lock(struct brcmf_fws_info *fws)
 564                 __acquires(&fws->spinlock)
 565 {
 566         spin_lock_irqsave(&fws->spinlock, fws->flags);
 567 }
 568
 569 static void brcmf_fws_unlock(struct brcmf_fws_info *fws)
 570                 __releases(&fws->spinlock)
 571 {
 572         spin_unlock_irqrestore(&fws->spinlock, fws->flags);
 573 }
 574
 575 static bool brcmf_fws_ifidx_match(struct sk_buff *skb, void *arg)
 576 {
 577         u32 ifidx = brcmf_skb_if_flags_get_field(skb, INDEX);
 578         return ifidx == *(int *)arg;
 579 }
 580
 581 static void brcmf_fws_psq_flush(struct brcmf_fws_info *fws, struct pktq *q,
 582                                 int ifidx)
 583 {
 584         bool (*matchfn)(struct sk_buff *, void *) = NULL;
 585         struct sk_buff *skb;
 586         int prec;
 587
 588         if (ifidx != -1)
 589                 matchfn = brcmf_fws_ifidx_match;
 590         for (prec = 0; prec < q->num_prec; prec++) {
 591                 skb = brcmu_pktq_pdeq_match(q, prec, matchfn, &ifidx);
 592                 while (skb) {
 593                         brcmu_pkt_buf_free_skb(skb);
 594                         skb = brcmu_pktq_pdeq_match(q, prec, matchfn, &ifidx);
 595                 }
 596         }
 597 }
 598
 599 static void brcmf_fws_hanger_init(struct brcmf_fws_hanger *hanger)
 600 {
 601         int i;
 602
 603         memset(hanger, 0, sizeof(*hanger));
 604         for (i = 0; i < ARRAY_SIZE(hanger->items); i++)
 605                 hanger->items[i].state = BRCMF_FWS_HANGER_ITEM_STATE_FREE;
 606 }
 607
 608 static u32 brcmf_fws_hanger_get_free_slot(struct brcmf_fws_hanger *h)
 609 {
 610         u32 i;
 611
 612         i = (h->slot_pos + 1) % BRCMF_FWS_HANGER_MAXITEMS;
 613
 614         while (i != h->slot_pos) {
 615                 if (h->items[i].state == BRCMF_FWS_HANGER_ITEM_STATE_FREE) {
 616                         h->slot_pos = i;
 617                         goto done;
 618                 }
 619                 i++;
 620                 if (i == BRCMF_FWS_HANGER_MAXITEMS)
 621                         i = 0;
 622         }
 623         brcmf_err("all slots occupied\n");
 624         h->failed_slotfind++;
 625         i = BRCMF_FWS_HANGER_MAXITEMS;
 626 done:
 627         return i;
 628 }
 629
 630 static int brcmf_fws_hanger_pushpkt(struct brcmf_fws_hanger *h,
 631                                     struct sk_buff *pkt, u32 slot_id)
 632 {
 633         if (slot_id >= BRCMF_FWS_HANGER_MAXITEMS)
 634                 return -ENOENT;
 635
 636         if (h->items[slot_id].state != BRCMF_FWS_HANGER_ITEM_STATE_FREE) {
 637                 brcmf_err("slot is not free\n");
 638                 h->failed_to_push++;
 639                 return -EINVAL;
 640         }
 641
 642         h->items[slot_id].state = BRCMF_FWS_HANGER_ITEM_STATE_INUSE;
 643         h->items[slot_id].pkt = pkt;
 644         h->pushed++;
 645         return 0;
 646 }
 647
 648 static inline int brcmf_fws_hanger_poppkt(struct brcmf_fws_hanger *h,
 649                                           u32 slot_id, struct sk_buff **pktout,
 650                                           bool remove_item)
 651 {
 652         if (slot_id >= BRCMF_FWS_HANGER_MAXITEMS)
 653                 return -ENOENT;
 654
 655         if (h->items[slot_id].state == BRCMF_FWS_HANGER_ITEM_STATE_FREE) {
 656                 brcmf_err("entry not in use\n");
 657                 h->failed_to_pop++;
 658                 return -EINVAL;
 659         }
 660
 661         *pktout = h->items[slot_id].pkt;
 662         if (remove_item) {
 663                 h->items[slot_id].state = BRCMF_FWS_HANGER_ITEM_STATE_FREE;
 664                 h->items[slot_id].pkt = NULL;
 665                 h->popped++;
 666         }
 667         return 0;
 668 }
 669
 670 static int brcmf_fws_hanger_mark_suppressed(struct brcmf_fws_hanger *h,
 671                                             u32 slot_id)
 672 {
 673         if (slot_id >= BRCMF_FWS_HANGER_MAXITEMS)
 674                 return -ENOENT;
 675
 676         if (h->items[slot_id].state == BRCMF_FWS_HANGER_ITEM_STATE_FREE) {
 677                 brcmf_err("entry not in use\n");
 678                 return -EINVAL;
 679         }
 680
 681         h->items[slot_id].state = BRCMF_FWS_HANGER_ITEM_STATE_INUSE_SUPPRESSED;
 682         return 0;
 683 }
 684
 685 static void brcmf_fws_hanger_cleanup(struct brcmf_fws_info *fws,
 686                                      bool (*fn)(struct sk_buff *, void *),
 687                                      int ifidx)
 688 {
 689         struct brcmf_fws_hanger *h = &fws->hanger;
 690         struct sk_buff *skb;
 691         int i;
 692         enum brcmf_fws_hanger_item_state s;
 693
 694         for (i = 0; i < ARRAY_SIZE(h->items); i++) {
 695                 s = h->items[i].state;
 696                 if (s == BRCMF_FWS_HANGER_ITEM_STATE_INUSE ||
 697                     s == BRCMF_FWS_HANGER_ITEM_STATE_INUSE_SUPPRESSED) {
 698                         skb = h->items[i].pkt;
 699                         if (fn == NULL || fn(skb, &ifidx)) {
 700                                 /* suppress packets freed from psq */
 701                                 if (s == BRCMF_FWS_HANGER_ITEM_STATE_INUSE)
 702                                         brcmu_pkt_buf_free_skb(skb);
 703                                 h->items[i].state =
 704                                         BRCMF_FWS_HANGER_ITEM_STATE_FREE;
 705                         }
 706                 }
 707         }
 708 }
 709
 710 static void brcmf_fws_macdesc_set_name(struct brcmf_fws_info *fws,
 711                                        struct brcmf_fws_mac_descriptor *desc)
 712 {
 713         if (desc == &fws->desc.other)
 714                 strlcpy(desc->name, "MAC-OTHER", sizeof(desc->name));
 715         else if (desc->mac_handle)
 716                 scnprintf(desc->name, sizeof(desc->name), "MAC-%d:%d",
 717                           desc->mac_handle, desc->interface_id);
 718         else
 719                 scnprintf(desc->name, sizeof(desc->name), "MACIF:%d",
 720                           desc->interface_id);
 721 }
 722
 723 static void brcmf_fws_macdesc_init(struct brcmf_fws_mac_descriptor *desc,
 724                                    u8 *addr, u8 ifidx)
 725 {
 726         brcmf_dbg(TRACE,
 727                   "enter: desc %p ea=%pM, ifidx=%u\n", desc, addr, ifidx);
 728         desc->occupied = 1;
 729         desc->state = BRCMF_FWS_STATE_OPEN;
 730         desc->requested_credit = 0;
 731         desc->requested_packet = 0;
 732         /* depending on use may need ifp->bsscfgidx instead */
 733         desc->interface_id = ifidx;
 734         desc->ac_bitmap = 0xff; /* update this when handling APSD */
 735         if (addr)
 736                 memcpy(&desc->ea[0], addr, ETH_ALEN);
 737 }
 738
 739 static
 740 void brcmf_fws_macdesc_deinit(struct brcmf_fws_mac_descriptor *desc)
 741 {
 742         brcmf_dbg(TRACE,
 743                   "enter: ea=%pM, ifidx=%u\n", desc->ea, desc->interface_id);
 744         desc->occupied = 0;
 745         desc->state = BRCMF_FWS_STATE_CLOSE;
 746         desc->requested_credit = 0;
 747         desc->requested_packet = 0;
 748 }
 749
 750 static struct brcmf_fws_mac_descriptor *
 751 brcmf_fws_macdesc_lookup(struct brcmf_fws_info *fws, u8 *ea)
 752 {
 753         struct brcmf_fws_mac_descriptor *entry;
 754         int i;
 755
 756         if (ea == NULL)
 757                 return ERR_PTR(-EINVAL);
 758
 759         entry = &fws->desc.nodes[0];
 760         for (i = 0; i < ARRAY_SIZE(fws->desc.nodes); i++) {
 761                 if (entry->occupied && !memcmp(entry->ea, ea, ETH_ALEN))
 762                         return entry;
 763                 entry++;
 764         }
 765
 766         return ERR_PTR(-ENOENT);
 767 }
 768
 769 static struct brcmf_fws_mac_descriptor*
 770 brcmf_fws_macdesc_find(struct brcmf_fws_info *fws, struct brcmf_if *ifp, u8 *da)
 771 {
 772         struct brcmf_fws_mac_descriptor *entry = &fws->desc.other;
 773         bool multicast;
 774
 775         multicast = is_multicast_ether_addr(da);
 776
 777         /* Multicast destination, STA and P2P clients get the interface entry.
 778          * STA/GC gets the Mac Entry for TDLS destinations, TDLS destinations
 779          * have their own entry.
 780          */
 781         if (multicast && ifp->fws_desc) {
 782                 entry = ifp->fws_desc;
 783                 goto done;
 784         }
 785
 786         entry = brcmf_fws_macdesc_lookup(fws, da);
 787         if (IS_ERR(entry))
 788                 entry = ifp->fws_desc;
 789
 790 done:
 791         return entry;
 792 }
 793
 794 static bool brcmf_fws_macdesc_closed(struct brcmf_fws_info *fws,
 795                                      struct brcmf_fws_mac_descriptor *entry,
 796                                      int fifo)
 797 {
 798         struct brcmf_fws_mac_descriptor *if_entry;
 799         bool closed;
 800
 801         /* for unique destination entries the related interface
 802          * may be closed.
 803          */
 804         if (entry->mac_handle) {
 805                 if_entry = &fws->desc.iface[entry->interface_id];
 806                 if (if_entry->state == BRCMF_FWS_STATE_CLOSE)
 807                         return true;
 808         }
 809         /* an entry is closed when the state is closed and
 810          * the firmware did not request anything.
 811          */
 812         closed = entry->state == BRCMF_FWS_STATE_CLOSE &&
 813                  !entry->requested_credit && !entry->requested_packet;
 814
 815         /* Or firmware does not allow traffic for given fifo */
 816         return closed || !(entry->ac_bitmap & BIT(fifo));
 817 }
 818
 819 static void brcmf_fws_macdesc_cleanup(struct brcmf_fws_info *fws,
 820                                       struct brcmf_fws_mac_descriptor *entry,
 821                                       int ifidx)
 822 {
 823         if (entry->occupied && (ifidx == -1 || ifidx == entry->interface_id)) {
 824                 brcmf_fws_psq_flush(fws, &entry->psq, ifidx);
 825                 entry->occupied = !!(entry->psq.len);
 826         }
 827 }
 828
 829 static void brcmf_fws_bus_txq_cleanup(struct brcmf_fws_info *fws,
 830                                       bool (*fn)(struct sk_buff *, void *),
 831                                       int ifidx)
 832 {
 833         struct brcmf_fws_hanger_item *hi;
 834         struct pktq *txq;
 835         struct sk_buff *skb;
 836         int prec;
 837         u32 hslot;
 838
 839         txq = brcmf_bus_gettxq(fws->drvr->bus_if);
 840         if (IS_ERR(txq)) {
 841                 brcmf_dbg(TRACE, "no txq to clean up\n");
 842                 return;
 843         }
 844
 845         for (prec = 0; prec < txq->num_prec; prec++) {
 846                 skb = brcmu_pktq_pdeq_match(txq, prec, fn, &ifidx);
 847                 while (skb) {
 848                         hslot = brcmf_skb_htod_tag_get_field(skb, HSLOT);
 849                         hi = &fws->hanger.items[hslot];
 850                         WARN_ON(skb != hi->pkt);
 851                         hi->state = BRCMF_FWS_HANGER_ITEM_STATE_FREE;
 852                         brcmu_pkt_buf_free_skb(skb);
 853                         skb = brcmu_pktq_pdeq_match(txq, prec, fn, &ifidx);
 854                 }
 855         }
 856 }
 857
 858 static void brcmf_fws_cleanup(struct brcmf_fws_info *fws, int ifidx)
 859 {
 860         int i;
 861         struct brcmf_fws_mac_descriptor *table;
 862         bool (*matchfn)(struct sk_buff *, void *) = NULL;
 863
 864         if (fws == NULL)
 865                 return;
 866
 867         if (ifidx != -1)
 868                 matchfn = brcmf_fws_ifidx_match;
 869
 870         /* cleanup individual nodes */
 871         table = &fws->desc.nodes[0];
 872         for (i = 0; i < ARRAY_SIZE(fws->desc.nodes); i++)
 873                 brcmf_fws_macdesc_cleanup(fws, &table[i], ifidx);
 874
 875         brcmf_fws_macdesc_cleanup(fws, &fws->desc.other, ifidx);
 876         brcmf_fws_bus_txq_cleanup(fws, matchfn, ifidx);
 877         brcmf_fws_hanger_cleanup(fws, matchfn, ifidx);
 878 }
 879
 880 static u8 brcmf_fws_hdrpush(struct brcmf_fws_info *fws, struct sk_buff *skb)
 881 {
 882         struct brcmf_fws_mac_descriptor *entry = brcmf_skbcb(skb)->mac;
 883         u8 *wlh;
 884         u16 data_offset = 0;
 885         u8 fillers;
 886         __le32 pkttag = cpu_to_le32(brcmf_skbcb(skb)->htod);
 887         __le16 pktseq = cpu_to_le16(brcmf_skbcb(skb)->htod_seq);
 888
 889         brcmf_dbg(TRACE, "enter: %s, idx=%d hslot=%d htod %X seq %X\n",
 890                   entry->name, brcmf_skb_if_flags_get_field(skb, INDEX),
 891                   (le32_to_cpu(pkttag) >> 8) & 0xffff,
 892                   brcmf_skbcb(skb)->htod, brcmf_skbcb(skb)->htod_seq);
 893         if (entry->send_tim_signal)
 894                 data_offset += 2 + BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP_LEN;
 895         if (BRCMF_FWS_MODE_GET_REUSESEQ(fws->mode))
 896                 data_offset += BRCMF_FWS_TYPE_SEQ_LEN;
 897         /* +2 is for Type[1] and Len[1] in TLV, plus TIM signal */
 898         data_offset += 2 + BRCMF_FWS_TYPE_PKTTAG_LEN;
 899         fillers = round_up(data_offset, 4) - data_offset;
 900         data_offset += fillers;
 901
 902         skb_push(skb, data_offset);
 903         wlh = skb->data;
 904
 905         wlh[0] = BRCMF_FWS_TYPE_PKTTAG;
 906         wlh[1] = BRCMF_FWS_TYPE_PKTTAG_LEN;
 907         memcpy(&wlh[2], &pkttag, sizeof(pkttag));
 908         if (BRCMF_FWS_MODE_GET_REUSESEQ(fws->mode)) {
 909                 wlh[1] += BRCMF_FWS_TYPE_SEQ_LEN;
 910                 memcpy(&wlh[2 + BRCMF_FWS_TYPE_PKTTAG_LEN], &pktseq,
 911                        sizeof(pktseq));
 912         }
 913         wlh += wlh[1] + 2;
 914
 915         if (entry->send_tim_signal) {
 916                 entry->send_tim_signal = 0;
 917                 wlh[0] = BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP;
 918                 wlh[1] = BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP_LEN;
 919                 wlh[2] = entry->mac_handle;
 920                 wlh[3] = entry->traffic_pending_bmp;
 921                 brcmf_dbg(TRACE, "adding TIM info: handle %d bmp 0x%X\n",
 922                           entry->mac_handle, entry->traffic_pending_bmp);
 923                 wlh += BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP_LEN + 2;
 924                 entry->traffic_lastreported_bmp = entry->traffic_pending_bmp;
 925         }
 926         if (fillers)
 927                 memset(wlh, BRCMF_FWS_TYPE_FILLER, fillers);
 928
 929         return (u8)(data_offset >> 2);
 930 }
 931
 932 static bool brcmf_fws_tim_update(struct brcmf_fws_info *fws,
 933                                  struct brcmf_fws_mac_descriptor *entry,
 934                                  int fifo, bool send_immediately)
 935 {
 936         struct sk_buff *skb;
 937         struct brcmf_skbuff_cb *skcb;
 938         s32 err;
 939         u32 len;
 940         u8 data_offset;
 941         int ifidx;
 942
 943         /* check delayedQ and suppressQ in one call using bitmap */
 944         if (brcmu_pktq_mlen(&entry->psq, 3 << (fifo * 2)) == 0)
 945                 entry->traffic_pending_bmp &= ~NBITVAL(fifo);
 946         else
 947                 entry->traffic_pending_bmp |= NBITVAL(fifo);
 948
 949         entry->send_tim_signal = false;
 950         if (entry->traffic_lastreported_bmp != entry->traffic_pending_bmp)
 951                 entry->send_tim_signal = true;
 952         if (send_immediately && entry->send_tim_signal &&
 953             entry->state == BRCMF_FWS_STATE_CLOSE) {
 954                 /* create a dummy packet and sent that. The traffic          */
 955                 /* bitmap info will automatically be attached to that packet */
 956                 len = BRCMF_FWS_TYPE_PKTTAG_LEN + 2 +
 957                       BRCMF_FWS_TYPE_SEQ_LEN +
 958                       BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP_LEN + 2 +
 959                       4 + fws->drvr->hdrlen;
 960                 skb = brcmu_pkt_buf_get_skb(len);
 961                 if (skb == NULL)
 962                         return false;
 963                 skb_pull(skb, len);
 964                 skcb = brcmf_skbcb(skb);
 965                 skcb->mac = entry;
 966                 skcb->state = BRCMF_FWS_SKBSTATE_TIM;
 967                 skcb->htod = 0;
 968                 skcb->htod_seq = 0;
 969                 data_offset = brcmf_fws_hdrpush(fws, skb);
 970                 ifidx = brcmf_skb_if_flags_get_field(skb, INDEX);
 971                 brcmf_fws_unlock(fws);
 972                 err = brcmf_proto_txdata(fws->drvr, ifidx, data_offset, skb);
 973                 brcmf_fws_lock(fws);
 974                 if (err)
 975                         brcmu_pkt_buf_free_skb(skb);
 976                 return true;
 977         }
 978         return false;
 979 }
 980
 981 static void
 982 brcmf_fws_flow_control_check(struct brcmf_fws_info *fws, struct pktq *pq,
 983                              u8 if_id)
 984 {
 985         struct brcmf_if *ifp = brcmf_get_ifp(fws->drvr, if_id);
 986
 987         if (WARN_ON(!ifp))
 988                 return;
 989
 990         if ((ifp->netif_stop & BRCMF_NETIF_STOP_REASON_FWS_FC) &&
 991             pq->len <= BRCMF_FWS_FLOWCONTROL_LOWATER)
 992                 brcmf_txflowblock_if(ifp,
 993                                      BRCMF_NETIF_STOP_REASON_FWS_FC, false);
 994         if (!(ifp->netif_stop & BRCMF_NETIF_STOP_REASON_FWS_FC) &&
 995             pq->len >= BRCMF_FWS_FLOWCONTROL_HIWATER) {
 996                 fws->stats.fws_flow_block++;
 997                 brcmf_txflowblock_if(ifp, BRCMF_NETIF_STOP_REASON_FWS_FC, true);
 998         }
 999         return;
1000 }
1001
1002 static int brcmf_fws_rssi_indicate(struct brcmf_fws_info *fws, s8 rssi)
1003 {
1004         brcmf_dbg(CTL, "rssi %d\n", rssi);
1005         return 0;
1006 }
1007
1008 static
1009 int brcmf_fws_macdesc_indicate(struct brcmf_fws_info *fws, u8 type, u8 *data)
1010 {
1011         struct brcmf_fws_mac_descriptor *entry, *existing;
1012         u8 mac_handle;
1013         u8 ifidx;
1014         u8 *addr;
1015
1016         mac_handle = *data++;
1017         ifidx = *data++;
1018         addr = data;
1019
1020         entry = &fws->desc.nodes[mac_handle & 0x1F];
1021         if (type == BRCMF_FWS_TYPE_MACDESC_DEL) {
1022                 if (entry->occupied) {
1023                         brcmf_dbg(TRACE, "deleting %s mac %pM\n",
1024                                   entry->name, addr);
1025                         brcmf_fws_lock(fws);
1026                         brcmf_fws_macdesc_cleanup(fws, entry, -1);
1027                         brcmf_fws_macdesc_deinit(entry);
1028                         brcmf_fws_unlock(fws);
1029                 } else
1030                         fws->stats.mac_update_failed++;
1031                 return 0;
1032         }
1033
1034         existing = brcmf_fws_macdesc_lookup(fws, addr);
1035         if (IS_ERR(existing)) {
1036                 if (!entry->occupied) {
1037                         brcmf_fws_lock(fws);
1038                         entry->mac_handle = mac_handle;
1039                         brcmf_fws_macdesc_init(entry, addr, ifidx);
1040                         brcmf_fws_macdesc_set_name(fws, entry);
1041                         brcmu_pktq_init(&entry->psq, BRCMF_FWS_PSQ_PREC_COUNT,
1042                                         BRCMF_FWS_PSQ_LEN);
1043                         brcmf_fws_unlock(fws);
1044                         brcmf_dbg(TRACE, "add %s mac %pM\n", entry->name, addr);
1045                 } else {
1046                         fws->stats.mac_update_failed++;
1047                 }
1048         } else {
1049                 if (entry != existing) {
1050                         brcmf_dbg(TRACE, "copy mac %s\n", existing->name);
1051                         brcmf_fws_lock(fws);
1052                         memcpy(entry, existing,
1053                                offsetof(struct brcmf_fws_mac_descriptor, psq));
1054                         entry->mac_handle = mac_handle;
1055                         brcmf_fws_macdesc_deinit(existing);
1056                         brcmf_fws_macdesc_set_name(fws, entry);
1057                         brcmf_fws_unlock(fws);
1058                         brcmf_dbg(TRACE, "relocate %s mac %pM\n", entry->name,
1059                                   addr);
1060                 } else {
1061                         brcmf_dbg(TRACE, "use existing\n");
1062                         WARN_ON(entry->mac_handle != mac_handle);
1063                         /* TODO: what should we do here: continue, reinit, .. */
1064                 }
1065         }
1066         return 0;
1067 }
1068
1069 static int brcmf_fws_macdesc_state_indicate(struct brcmf_fws_info *fws,
1070                                             u8 type, u8 *data)
1071 {
1072         struct brcmf_fws_mac_descriptor *entry;
1073         u8 mac_handle;
1074         int ret;
1075
1076         mac_handle = data[0];
1077         entry = &fws->desc.nodes[mac_handle & 0x1F];
1078         if (!entry->occupied) {
1079                 fws->stats.mac_ps_update_failed++;
1080                 return -ESRCH;
1081         }
1082         brcmf_fws_lock(fws);
1083         /* a state update should wipe old credits */
1084         entry->requested_credit = 0;
1085         entry->requested_packet = 0;
1086         if (type == BRCMF_FWS_TYPE_MAC_OPEN) {
1087                 entry->state = BRCMF_FWS_STATE_OPEN;
1088                 ret = BRCMF_FWS_RET_OK_SCHEDULE;
1089         } else {
1090                 entry->state = BRCMF_FWS_STATE_CLOSE;
1091                 brcmf_fws_tim_update(fws, entry, BRCMF_FWS_FIFO_AC_BK, false);
1092                 brcmf_fws_tim_update(fws, entry, BRCMF_FWS_FIFO_AC_BE, false);
1093                 brcmf_fws_tim_update(fws, entry, BRCMF_FWS_FIFO_AC_VI, false);
1094                 brcmf_fws_tim_update(fws, entry, BRCMF_FWS_FIFO_AC_VO, true);
1095                 ret = BRCMF_FWS_RET_OK_NOSCHEDULE;
1096         }
1097         brcmf_fws_unlock(fws);
1098         return ret;
1099 }
1100
1101 static int brcmf_fws_interface_state_indicate(struct brcmf_fws_info *fws,
1102                                               u8 type, u8 *data)
1103 {
1104         struct brcmf_fws_mac_descriptor *entry;
1105         u8 ifidx;
1106         int ret;
1107
1108         ifidx = data[0];
1109
1110         if (ifidx >= BRCMF_MAX_IFS) {
1111                 ret = -ERANGE;
1112                 goto fail;
1113         }
1114
1115         entry = &fws->desc.iface[ifidx];
1116         if (!entry->occupied) {
1117                 ret = -ESRCH;
1118                 goto fail;
1119         }
1120
1121         brcmf_dbg(TRACE, "%s (%d): %s\n", brcmf_fws_get_tlv_name(type), type,
1122                   entry->name);
1123         brcmf_fws_lock(fws);
1124         switch (type) {
1125         case BRCMF_FWS_TYPE_INTERFACE_OPEN:
1126                 entry->state = BRCMF_FWS_STATE_OPEN;
1127                 ret = BRCMF_FWS_RET_OK_SCHEDULE;
1128                 break;
1129         case BRCMF_FWS_TYPE_INTERFACE_CLOSE:
1130                 entry->state = BRCMF_FWS_STATE_CLOSE;
1131                 ret = BRCMF_FWS_RET_OK_NOSCHEDULE;
1132                 break;
1133         default:
1134                 ret = -EINVAL;
1135                 brcmf_fws_unlock(fws);
1136                 goto fail;
1137         }
1138         brcmf_fws_unlock(fws);
1139         return ret;
1140
1141 fail:
1142         fws->stats.if_update_failed++;
1143         return ret;
1144 }
1145
1146 static int brcmf_fws_request_indicate(struct brcmf_fws_info *fws, u8 type,
1147                                       u8 *data)
1148 {
1149         struct brcmf_fws_mac_descriptor *entry;
1150
1151         entry = &fws->desc.nodes[data[1] & 0x1F];
1152         if (!entry->occupied) {
1153                 if (type == BRCMF_FWS_TYPE_MAC_REQUEST_CREDIT)
1154                         fws->stats.credit_request_failed++;
1155                 else
1156                         fws->stats.packet_request_failed++;
1157                 return -ESRCH;
1158         }
1159
1160         brcmf_dbg(TRACE, "%s (%d): %s cnt %d bmp %d\n",
1161                   brcmf_fws_get_tlv_name(type), type, entry->name,
1162                   data[0], data[2]);
1163         brcmf_fws_lock(fws);
1164         if (type == BRCMF_FWS_TYPE_MAC_REQUEST_CREDIT)
1165                 entry->requested_credit = data[0];
1166         else
1167                 entry->requested_packet = data[0];
1168
1169         entry->ac_bitmap = data[2];
1170         brcmf_fws_unlock(fws);
1171         return BRCMF_FWS_RET_OK_SCHEDULE;
1172 }
1173
1174 static void
1175 brcmf_fws_macdesc_use_req_credit(struct brcmf_fws_mac_descriptor *entry,
1176                                  struct sk_buff *skb)
1177 {
1178         if (entry->requested_credit > 0) {
1179                 entry->requested_credit--;
1180                 brcmf_skb_if_flags_set_field(skb, REQUESTED, 1);
1181                 brcmf_skb_if_flags_set_field(skb, REQ_CREDIT, 1);
1182                 if (entry->state != BRCMF_FWS_STATE_CLOSE)
1183                         brcmf_err("requested credit set while mac not closed!\n");
1184         } else if (entry->requested_packet > 0) {
1185                 entry->requested_packet--;
1186                 brcmf_skb_if_flags_set_field(skb, REQUESTED, 1);
1187                 brcmf_skb_if_flags_set_field(skb, REQ_CREDIT, 0);
1188                 if (entry->state != BRCMF_FWS_STATE_CLOSE)
1189                         brcmf_err("requested packet set while mac not closed!\n");
1190         } else {
1191                 brcmf_skb_if_flags_set_field(skb, REQUESTED, 0);
1192                 brcmf_skb_if_flags_set_field(skb, REQ_CREDIT, 0);
1193         }
1194 }
1195
1196 static void brcmf_fws_macdesc_return_req_credit(struct sk_buff *skb)
1197 {
1198         struct brcmf_fws_mac_descriptor *entry = brcmf_skbcb(skb)->mac;
1199
1200         if ((brcmf_skb_if_flags_get_field(skb, REQ_CREDIT)) &&
1201             (entry->state == BRCMF_FWS_STATE_CLOSE))
1202                 entry->requested_credit++;
1203 }
1204
1205 static void brcmf_fws_return_credits(struct brcmf_fws_info *fws,
1206                                      u8 fifo, u8 credits)
1207 {
1208         int lender_ac;
1209         int *borrowed;
1210         int *fifo_credit;
1211
1212         if (!credits)
1213                 return;
1214
1215         fws->fifo_credit_map |= 1 << fifo;
1216
1217         if ((fifo == BRCMF_FWS_FIFO_AC_BE) &&
1218             (fws->credits_borrowed[0])) {
1219                 for (lender_ac = BRCMF_FWS_FIFO_AC_VO; lender_ac >= 0;
1220                      lender_ac--) {
1221                         borrowed = &fws->credits_borrowed[lender_ac];
1222                         if (*borrowed) {
1223                                 fws->fifo_credit_map |= (1 << lender_ac);
1224                                 fifo_credit = &fws->fifo_credit[lender_ac];
1225                                 if (*borrowed >= credits) {
1226                                         *borrowed -= credits;
1227                                         *fifo_credit += credits;
1228                                         return;
1229                                 } else {
1230                                         credits -= *borrowed;
1231                                         *fifo_credit += *borrowed;
1232                                         *borrowed = 0;
1233                                 }
1234                         }
1235                 }
1236         }
1237
1238         fws->fifo_credit[fifo] += credits;
1239 }
1240
1241 static void brcmf_fws_schedule_deq(struct brcmf_fws_info *fws)
1242 {
1243         /* only schedule dequeue when there are credits for delayed traffic */
1244         if ((fws->fifo_credit_map & fws->fifo_delay_map) ||
1245             (!brcmf_fws_fc_active(fws) && fws->fifo_delay_map))
1246                 queue_work(fws->fws_wq, &fws->fws_dequeue_work);
1247 }
1248
1249 static int brcmf_fws_enq(struct brcmf_fws_info *fws,
1250                          enum brcmf_fws_skb_state state, int fifo,
1251                          struct sk_buff *p)
1252 {
1253         int prec = 2 * fifo;
1254         u32 *qfull_stat = &fws->stats.delayq_full_error;
1255         struct brcmf_fws_mac_descriptor *entry;
1256         struct pktq *pq;
1257         struct sk_buff_head *queue;
1258         struct sk_buff *p_head;
1259         struct sk_buff *p_tail;
1260         u32 fr_new;
1261         u32 fr_compare;
1262
1263         entry = brcmf_skbcb(p)->mac;
1264         if (entry == NULL) {
1265                 brcmf_err("no mac descriptor found for skb %p\n", p);
1266                 return -ENOENT;
1267         }
1268
1269         brcmf_dbg(DATA, "enter: fifo %d skb %p\n", fifo, p);
1270         if (state == BRCMF_FWS_SKBSTATE_SUPPRESSED) {
1271                 prec += 1;
1272                 qfull_stat = &fws->stats.supprq_full_error;
1273
1274                 /* Fix out of order delivery of frames. Dont assume frame    */
1275                 /* can be inserted at the end, but look for correct position */
1276                 pq = &entry->psq;
1277                 if (pktq_full(pq) || pktq_pfull(pq, prec)) {
1278                         *qfull_stat += 1;
1279                         return -ENFILE;
1280                 }
1281                 queue = &pq->q[prec].skblist;
1282
1283                 p_head = skb_peek(queue);
1284                 p_tail = skb_peek_tail(queue);
1285                 fr_new = brcmf_skb_htod_tag_get_field(p, FREERUN);
1286
1287                 while (p_head != p_tail) {
1288                         fr_compare = brcmf_skb_htod_tag_get_field(p_tail,
1289                                                                   FREERUN);
1290                         /* be sure to handle wrap of 256 */
1291                         if (((fr_new > fr_compare) &&
1292                              ((fr_new - fr_compare) < 128)) ||
1293                             ((fr_new < fr_compare) &&
1294                              ((fr_compare - fr_new) > 128)))
1295                                 break;
1296                         p_tail = skb_queue_prev(queue, p_tail);
1297                 }
1298                 /* Position found. Determine what to do */
1299                 if (p_tail == NULL) {
1300                         /* empty list */
1301                         __skb_queue_tail(queue, p);
1302                 } else {
1303                         fr_compare = brcmf_skb_htod_tag_get_field(p_tail,
1304                                                                   FREERUN);
1305                         if (((fr_new > fr_compare) &&
1306                              ((fr_new - fr_compare) < 128)) ||
1307                             ((fr_new < fr_compare) &&
1308                              ((fr_compare - fr_new) > 128))) {
1309                                 /* After tail */
1310                                 __skb_queue_after(queue, p_tail, p);
1311                         } else {
1312                                 /* Before tail */
1313                                 __skb_insert(p, p_tail->prev, p_tail, queue);
1314                         }
1315                 }
1316
1317                 /* Complete the counters and statistics */
1318                 pq->len++;
1319                 if (pq->hi_prec < prec)
1320                         pq->hi_prec = (u8) prec;
1321         } else if (brcmu_pktq_penq(&entry->psq, prec, p) == NULL) {
1322                 *qfull_stat += 1;
1323                 return -ENFILE;
1324         }
1325
1326         /* increment total enqueued packet count */
1327         fws->fifo_delay_map |= 1 << fifo;
1328         fws->fifo_enqpkt[fifo]++;
1329
1330         /* update the sk_buff state */
1331         brcmf_skbcb(p)->state = state;
1332
1333         /*
1334          * A packet has been pushed so update traffic
1335          * availability bitmap, if applicable
1336          */
1337         brcmf_fws_tim_update(fws, entry, fifo, true);
1338         brcmf_fws_flow_control_check(fws, &entry->psq,
1339                                      brcmf_skb_if_flags_get_field(p, INDEX));
1340         return 0;
1341 }
1342
1343 static struct sk_buff *brcmf_fws_deq(struct brcmf_fws_info *fws, int fifo)
1344 {
1345         struct brcmf_fws_mac_descriptor *table;
1346         struct brcmf_fws_mac_descriptor *entry;
1347         struct sk_buff *p;
1348         int num_nodes;
1349         int node_pos;
1350         int prec_out;
1351         int pmsk;
1352         int i;
1353
1354         table = (struct brcmf_fws_mac_descriptor *)&fws->desc;
1355         num_nodes = sizeof(fws->desc) / sizeof(struct brcmf_fws_mac_descriptor);
1356         node_pos = fws->deq_node_pos[fifo];
1357
1358         for (i = 0; i < num_nodes; i++) {
1359                 entry = &table[(node_pos + i) % num_nodes];
1360                 if (!entry->occupied ||
1361                     brcmf_fws_macdesc_closed(fws, entry, fifo))
1362                         continue;
1363
1364                 if (entry->suppressed)
1365                         pmsk = 2;
1366                 else
1367                         pmsk = 3;
1368                 p = brcmu_pktq_mdeq(&entry->psq, pmsk << (fifo * 2), &prec_out);
1369                 if (p == NULL) {
1370                         if (entry->suppressed) {
1371                                 if (entry->suppr_transit_count)
1372                                         continue;
1373                                 entry->suppressed = false;
1374                                 p = brcmu_pktq_mdeq(&entry->psq,
1375                                                     1 << (fifo * 2), &prec_out);
1376                         }
1377                 }
1378                 if  (p == NULL)
1379                         continue;
1380
1381                 brcmf_fws_macdesc_use_req_credit(entry, p);
1382
1383                 /* move dequeue position to ensure fair round-robin */
1384                 fws->deq_node_pos[fifo] = (node_pos + i + 1) % num_nodes;
1385                 brcmf_fws_flow_control_check(fws, &entry->psq,
1386                                              brcmf_skb_if_flags_get_field(p,
1387                                                                           INDEX)
1388                                              );
1389                 /*
1390                  * A packet has been picked up, update traffic
1391                  * availability bitmap, if applicable
1392                  */
1393                 brcmf_fws_tim_update(fws, entry, fifo, false);
1394
1395                 /*
1396                  * decrement total enqueued fifo packets and
1397                  * clear delay bitmap if done.
1398                  */
1399                 fws->fifo_enqpkt[fifo]--;
1400                 if (fws->fifo_enqpkt[fifo] == 0)
1401                         fws->fifo_delay_map &= ~(1 << fifo);
1402                 goto done;
1403         }
1404         p = NULL;
1405 done:
1406         brcmf_dbg(DATA, "exit: fifo %d skb %p\n", fifo, p);
1407         return p;
1408 }
1409
1410 static int brcmf_fws_txstatus_suppressed(struct brcmf_fws_info *fws, int fifo,
1411                                          struct sk_buff *skb,
1412                                          u32 genbit, u16 seq)
1413 {
1414         struct brcmf_fws_mac_descriptor *entry = brcmf_skbcb(skb)->mac;
1415         u32 hslot;
1416         int ret;
1417
1418         hslot = brcmf_skb_htod_tag_get_field(skb, HSLOT);
1419
1420         /* this packet was suppressed */
1421         if (!entry->suppressed) {
1422                 entry->suppressed = true;
1423                 entry->suppr_transit_count = entry->transit_count;
1424                 brcmf_dbg(DATA, "suppress %s: transit %d\n",
1425                           entry->name, entry->transit_count);
1426         }
1427
1428         entry->generation = genbit;
1429
1430         brcmf_skb_htod_tag_set_field(skb, GENERATION, genbit);
1431         brcmf_skbcb(skb)->htod_seq = seq;
1432         if (brcmf_skb_htod_seq_get_field(skb, FROMFW)) {
1433                 brcmf_skb_htod_seq_set_field(skb, FROMDRV, 1);
1434                 brcmf_skb_htod_seq_set_field(skb, FROMFW, 0);
1435         } else {
1436                 brcmf_skb_htod_seq_set_field(skb, FROMDRV, 0);
1437         }
1438         ret = brcmf_fws_enq(fws, BRCMF_FWS_SKBSTATE_SUPPRESSED, fifo, skb);
1439
1440         if (ret != 0) {
1441                 /* suppress q is full drop this packet */
1442                 brcmf_fws_hanger_poppkt(&fws->hanger, hslot, &skb, true);
1443         } else {
1444                 /* Mark suppressed to avoid a double free during wlfc cleanup */
1445                 brcmf_fws_hanger_mark_suppressed(&fws->hanger, hslot);
1446         }
1447
1448         return ret;
1449 }
1450
1451 static int
1452 brcmf_fws_txs_process(struct brcmf_fws_info *fws, u8 flags, u32 hslot,
1453                       u32 genbit, u16 seq)
1454 {
1455         u32 fifo;
1456         int ret;
1457         bool remove_from_hanger = true;
1458         struct sk_buff *skb;
1459         struct brcmf_skbuff_cb *skcb;
1460         struct brcmf_fws_mac_descriptor *entry = NULL;
1461         struct brcmf_if *ifp;
1462
1463         brcmf_dbg(DATA, "flags %d\n", flags);
1464
1465         if (flags == BRCMF_FWS_TXSTATUS_DISCARD)
1466                 fws->stats.txs_discard++;
1467         else if (flags == BRCMF_FWS_TXSTATUS_CORE_SUPPRESS) {
1468                 fws->stats.txs_supp_core++;
1469                 remove_from_hanger = false;
1470         } else if (flags == BRCMF_FWS_TXSTATUS_FW_PS_SUPPRESS) {
1471                 fws->stats.txs_supp_ps++;
1472                 remove_from_hanger = false;
1473         } else if (flags == BRCMF_FWS_TXSTATUS_FW_TOSSED)
1474                 fws->stats.txs_tossed++;
1475         else if (flags == BRCMF_FWS_TXSTATUS_HOST_TOSSED)
1476                 fws->stats.txs_host_tossed++;
1477         else
1478                 brcmf_err("unexpected txstatus\n");
1479
1480         ret = brcmf_fws_hanger_poppkt(&fws->hanger, hslot, &skb,
1481                                       remove_from_hanger);
1482         if (ret != 0) {
1483                 brcmf_err("no packet in hanger slot: hslot=%d\n", hslot);
1484                 return ret;
1485         }
1486
1487         skcb = brcmf_skbcb(skb);
1488         entry = skcb->mac;
1489         if (WARN_ON(!entry)) {
1490                 brcmu_pkt_buf_free_skb(skb);
1491                 return -EINVAL;
1492         }
1493         entry->transit_count--;
1494         if (entry->suppressed && entry->suppr_transit_count)
1495                 entry->suppr_transit_count--;
1496
1497         brcmf_dbg(DATA, "%s flags %d htod %X seq %X\n", entry->name, flags,
1498                   skcb->htod, seq);
1499
1500         /* pick up the implicit credit from this packet */
1501         fifo = brcmf_skb_htod_tag_get_field(skb, FIFO);
1502         if ((fws->fcmode == BRCMF_FWS_FCMODE_IMPLIED_CREDIT) ||
1503             (brcmf_skb_if_flags_get_field(skb, REQ_CREDIT)) ||
1504             (flags == BRCMF_FWS_TXSTATUS_HOST_TOSSED)) {
1505                 brcmf_fws_return_credits(fws, fifo, 1);
1506                 brcmf_fws_schedule_deq(fws);
1507         }
1508         brcmf_fws_macdesc_return_req_credit(skb);
1509
1510         ret = brcmf_proto_hdrpull(fws->drvr, false, skb, &ifp);
1511         if (ret) {
1512                 brcmu_pkt_buf_free_skb(skb);
1513                 return -EINVAL;
1514         }
1515         if (!remove_from_hanger)
1516                 ret = brcmf_fws_txstatus_suppressed(fws, fifo, skb,
1517                                                     genbit, seq);
1518         if (remove_from_hanger || ret)
1519                 brcmf_txfinalize(ifp, skb, true);
1520
1521         return 0;
1522 }
1523
1524 static int brcmf_fws_fifocreditback_indicate(struct brcmf_fws_info *fws,
1525                                              u8 *data)
1526 {
1527         int i;
1528
1529         if (fws->fcmode != BRCMF_FWS_FCMODE_EXPLICIT_CREDIT) {
1530                 brcmf_dbg(INFO, "ignored\n");
1531                 return BRCMF_FWS_RET_OK_NOSCHEDULE;
1532         }
1533
1534         brcmf_dbg(DATA, "enter: data %pM\n", data);
1535         brcmf_fws_lock(fws);
1536         for (i = 0; i < BRCMF_FWS_FIFO_COUNT; i++)
1537                 brcmf_fws_return_credits(fws, i, data[i]);
1538
1539         brcmf_dbg(DATA, "map: credit %x delay %x\n", fws->fifo_credit_map,
1540                   fws->fifo_delay_map);
1541         brcmf_fws_unlock(fws);
1542         return BRCMF_FWS_RET_OK_SCHEDULE;
1543 }
1544
1545 static int brcmf_fws_txstatus_indicate(struct brcmf_fws_info *fws, u8 *data)
1546 {
1547         __le32 status_le;
1548         __le16 seq_le;
1549         u32 status;
1550         u32 hslot;
1551         u32 genbit;
1552         u8 flags;
1553         u16 seq;
1554
1555         fws->stats.txs_indicate++;
1556         memcpy(&status_le, data, sizeof(status_le));
1557         status = le32_to_cpu(status_le);
1558         flags = brcmf_txstatus_get_field(status, FLAGS);
1559         hslot = brcmf_txstatus_get_field(status, HSLOT);
1560         genbit = brcmf_txstatus_get_field(status, GENERATION);
1561         if (BRCMF_FWS_MODE_GET_REUSESEQ(fws->mode)) {
1562                 memcpy(&seq_le, &data[BRCMF_FWS_TYPE_PKTTAG_LEN],
1563                        sizeof(seq_le));
1564                 seq = le16_to_cpu(seq_le);
1565         } else {
1566                 seq = 0;
1567         }
1568
1569         brcmf_fws_lock(fws);
1570         brcmf_fws_txs_process(fws, flags, hslot, genbit, seq);
1571         brcmf_fws_unlock(fws);
1572         return BRCMF_FWS_RET_OK_NOSCHEDULE;
1573 }
1574
1575 static int brcmf_fws_dbg_seqnum_check(struct brcmf_fws_info *fws, u8 *data)
1576 {
1577         __le32 timestamp;
1578
1579         memcpy(&timestamp, &data[2], sizeof(timestamp));
1580         brcmf_dbg(CTL, "received: seq %d, timestamp %d\n", data[1],
1581                   le32_to_cpu(timestamp));
1582         return 0;
1583 }
1584
1585 static int brcmf_fws_notify_credit_map(struct brcmf_if *ifp,
1586                                        const struct brcmf_event_msg *e,
1587                                        void *data)
1588 {
1589         struct brcmf_fws_info *fws = ifp->drvr->fws;
1590         int i;
1591         u8 *credits = data;
1592
1593         if (e->datalen < BRCMF_FWS_FIFO_COUNT) {
1594                 brcmf_err("event payload too small (%d)\n", e->datalen);
1595                 return -EINVAL;
1596         }
1597         if (fws->creditmap_received)
1598                 return 0;
1599
1600         fws->creditmap_received = true;
1601
1602         brcmf_dbg(TRACE, "enter: credits %pM\n", credits);
1603         brcmf_fws_lock(fws);
1604         for (i = 0; i < ARRAY_SIZE(fws->fifo_credit); i++) {
1605                 if (*credits)
1606                         fws->fifo_credit_map |= 1 << i;
1607                 else
1608                         fws->fifo_credit_map &= ~(1 << i);
1609                 fws->fifo_credit[i] = *credits++;
1610         }
1611         brcmf_fws_schedule_deq(fws);
1612         brcmf_fws_unlock(fws);
1613         return 0;
1614 }
1615
1616 static int brcmf_fws_notify_bcmc_credit_support(struct brcmf_if *ifp,
1617                                                 const struct brcmf_event_msg *e,
1618                                                 void *data)
1619 {
1620         struct brcmf_fws_info *fws = ifp->drvr->fws;
1621
1622         if (fws) {
1623                 brcmf_fws_lock(fws);
1624                 fws->bcmc_credit_check = true;
1625                 brcmf_fws_unlock(fws);
1626         }
1627         return 0;
1628 }
1629
1630 static void brcmf_rxreorder_get_skb_list(struct brcmf_ampdu_rx_reorder *rfi,
1631                                          u8 start, u8 end,
1632                                          struct sk_buff_head *skb_list)
1633 {
1634         /* initialize return list */
1635         __skb_queue_head_init(skb_list);
1636
1637         if (rfi->pend_pkts == 0) {
1638                 brcmf_dbg(INFO, "no packets in reorder queue\n");
1639                 return;
1640         }
1641
1642         do {
1643                 if (rfi->pktslots[start]) {
1644                         __skb_queue_tail(skb_list, rfi->pktslots[start]);
1645                         rfi->pktslots[start] = NULL;
1646                 }
1647                 start++;
1648                 if (start > rfi->max_idx)
1649                         start = 0;
1650         } while (start != end);
1651         rfi->pend_pkts -= skb_queue_len(skb_list);
1652 }
1653
1654 void brcmf_fws_rxreorder(struct brcmf_if *ifp, struct sk_buff *pkt)
1655 {
1656         u8 *reorder_data;
1657         u8 flow_id, max_idx, cur_idx, exp_idx, end_idx;
1658         struct brcmf_ampdu_rx_reorder *rfi;
1659         struct sk_buff_head reorder_list;
1660         struct sk_buff *pnext;
1661         u8 flags;
1662         u32 buf_size;
1663
1664         reorder_data = ((struct brcmf_skb_reorder_data *)pkt->cb)->reorder;
1665         flow_id = reorder_data[BRCMF_RXREORDER_FLOWID_OFFSET];
1666         flags = reorder_data[BRCMF_RXREORDER_FLAGS_OFFSET];
1667
1668         /* validate flags and flow id */
1669         if (flags == 0xFF) {
1670                 brcmf_err("invalid flags...so ignore this packet\n");
1671                 brcmf_netif_rx(ifp, pkt);
1672                 return;
1673         }
1674
1675         rfi = ifp->drvr->reorder_flows[flow_id];
1676         if (flags & BRCMF_RXREORDER_DEL_FLOW) {
1677                 brcmf_dbg(INFO, "flow-%d: delete\n",
1678                           flow_id);
1679
1680                 if (rfi == NULL) {
1681                         brcmf_dbg(INFO, "received flags to cleanup, but no flow (%d) yet\n",
1682                                   flow_id);
1683                         brcmf_netif_rx(ifp, pkt);
1684                         return;
1685                 }
1686
1687                 brcmf_rxreorder_get_skb_list(rfi, rfi->exp_idx, rfi->exp_idx,
1688                                              &reorder_list);
1689                 /* add the last packet */
1690                 __skb_queue_tail(&reorder_list, pkt);
1691                 kfree(rfi);
1692                 ifp->drvr->reorder_flows[flow_id] = NULL;
1693                 goto netif_rx;
1694         }
1695         /* from here on we need a flow reorder instance */
1696         if (rfi == NULL) {
1697                 buf_size = sizeof(*rfi);
1698                 max_idx = reorder_data[BRCMF_RXREORDER_MAXIDX_OFFSET];
1699
1700                 buf_size += (max_idx + 1) * sizeof(pkt);
1701
1702                 /* allocate space for flow reorder info */
1703                 brcmf_dbg(INFO, "flow-%d: start, maxidx %d\n",
1704                           flow_id, max_idx);
1705                 rfi = kzalloc(buf_size, GFP_ATOMIC);
1706                 if (rfi == NULL) {
1707                         brcmf_err("failed to alloc buffer\n");
1708                         brcmf_netif_rx(ifp, pkt);
1709                         return;
1710                 }
1711
1712                 ifp->drvr->reorder_flows[flow_id] = rfi;
1713                 rfi->pktslots = (struct sk_buff **)(rfi + 1);
1714                 rfi->max_idx = max_idx;
1715         }
1716         if (flags & BRCMF_RXREORDER_NEW_HOLE)  {
1717                 if (rfi->pend_pkts) {
1718                         brcmf_rxreorder_get_skb_list(rfi, rfi->exp_idx,
1719                                                      rfi->exp_idx,
1720                                                      &reorder_list);
1721                         WARN_ON(rfi->pend_pkts);
1722                 } else {
1723                         __skb_queue_head_init(&reorder_list);
1724                 }
1725                 rfi->cur_idx = reorder_data[BRCMF_RXREORDER_CURIDX_OFFSET];
1726                 rfi->exp_idx = reorder_data[BRCMF_RXREORDER_EXPIDX_OFFSET];
1727                 rfi->max_idx = reorder_data[BRCMF_RXREORDER_MAXIDX_OFFSET];
1728                 rfi->pktslots[rfi->cur_idx] = pkt;
1729                 rfi->pend_pkts++;
1730                 brcmf_dbg(DATA, "flow-%d: new hole %d (%d), pending %d\n",
1731                           flow_id, rfi->cur_idx, rfi->exp_idx, rfi->pend_pkts);
1732         } else if (flags & BRCMF_RXREORDER_CURIDX_VALID) {
1733                 cur_idx = reorder_data[BRCMF_RXREORDER_CURIDX_OFFSET];
1734                 exp_idx = reorder_data[BRCMF_RXREORDER_EXPIDX_OFFSET];
1735
1736                 if ((exp_idx == rfi->exp_idx) && (cur_idx != rfi->exp_idx)) {
1737                         /* still in the current hole */
1738                         /* enqueue the current on the buffer chain */
1739                         if (rfi->pktslots[cur_idx] != NULL) {
1740                                 brcmf_dbg(INFO, "HOLE: ERROR buffer pending..free it\n");
1741                                 brcmu_pkt_buf_free_skb(rfi->pktslots[cur_idx]);
1742                                 rfi->pktslots[cur_idx] = NULL;
1743                         }
1744                         rfi->pktslots[cur_idx] = pkt;
1745                         rfi->pend_pkts++;
1746                         rfi->cur_idx = cur_idx;
1747                         brcmf_dbg(DATA, "flow-%d: store pkt %d (%d), pending %d\n",
1748                                   flow_id, cur_idx, exp_idx, rfi->pend_pkts);
1749
1750                         /* can return now as there is no reorder
1751                          * list to process.
1752                          */
1753                         return;
1754                 }
1755                 if (rfi->exp_idx == cur_idx) {
1756                         if (rfi->pktslots[cur_idx] != NULL) {
1757                                 brcmf_dbg(INFO, "error buffer pending..free it\n");
1758                                 brcmu_pkt_buf_free_skb(rfi->pktslots[cur_idx]);
1759                                 rfi->pktslots[cur_idx] = NULL;
1760                         }
1761                         rfi->pktslots[cur_idx] = pkt;
1762                         rfi->pend_pkts++;
1763
1764                         /* got the expected one. flush from current to expected
1765                          * and update expected
1766                          */
1767                         brcmf_dbg(DATA, "flow-%d: expected %d (%d), pending %d\n",
1768                                   flow_id, cur_idx, exp_idx, rfi->pend_pkts);
1769
1770                         rfi->cur_idx = cur_idx;
1771                         rfi->exp_idx = exp_idx;
1772
1773                         brcmf_rxreorder_get_skb_list(rfi, cur_idx, exp_idx,
1774                                                      &reorder_list);
1775                         brcmf_dbg(DATA, "flow-%d: freeing buffers %d, pending %d\n",
1776                                   flow_id, skb_queue_len(&reorder_list),
1777                                   rfi->pend_pkts);
1778                 } else {
1779                         u8 end_idx;
1780
1781                         brcmf_dbg(DATA, "flow-%d (0x%x): both moved, old %d/%d, new %d/%d\n",
1782                                   flow_id, flags, rfi->cur_idx, rfi->exp_idx,
1783                                   cur_idx, exp_idx);
1784                         if (flags & BRCMF_RXREORDER_FLUSH_ALL)
1785                                 end_idx = rfi->exp_idx;
1786                         else
1787                                 end_idx = exp_idx;
1788
1789                         /* flush pkts first */
1790                         brcmf_rxreorder_get_skb_list(rfi, rfi->exp_idx, end_idx,
1791                                                      &reorder_list);
1792
1793                         if (exp_idx == ((cur_idx + 1) % (rfi->max_idx + 1))) {
1794                                 __skb_queue_tail(&reorder_list, pkt);
1795                         } else {
1796                                 rfi->pktslots[cur_idx] = pkt;
1797                                 rfi->pend_pkts++;
1798                         }
1799                         rfi->exp_idx = exp_idx;
1800                         rfi->cur_idx = cur_idx;
1801                 }
1802         } else {
1803                 /* explicity window move updating the expected index */
1804                 exp_idx = reorder_data[BRCMF_RXREORDER_EXPIDX_OFFSET];
1805
1806                 brcmf_dbg(DATA, "flow-%d (0x%x): change expected: %d -> %d\n",
1807                           flow_id, flags, rfi->exp_idx, exp_idx);
1808                 if (flags & BRCMF_RXREORDER_FLUSH_ALL)
1809                         end_idx =  rfi->exp_idx;
1810                 else
1811                         end_idx =  exp_idx;
1812
1813                 brcmf_rxreorder_get_skb_list(rfi, rfi->exp_idx, end_idx,
1814                                              &reorder_list);
1815                 __skb_queue_tail(&reorder_list, pkt);
1816                 /* set the new expected idx */
1817                 rfi->exp_idx = exp_idx;
1818         }
1819 netif_rx:
1820         skb_queue_walk_safe(&reorder_list, pkt, pnext) {
1821                 __skb_unlink(pkt, &reorder_list);
1822                 brcmf_netif_rx(ifp, pkt);
1823         }
1824 }
1825
1826 void brcmf_fws_hdrpull(struct brcmf_if *ifp, s16 siglen, struct sk_buff *skb)
1827 {
1828         struct brcmf_skb_reorder_data *rd;
1829         struct brcmf_fws_info *fws = ifp->drvr->fws;
1830         u8 *signal_data;
1831         s16 data_len;
1832         u8 type;
1833         u8 len;
1834         u8 *data;
1835         s32 status;
1836         s32 err;
1837
1838         brcmf_dbg(HDRS, "enter: ifidx %d, skblen %u, sig %d\n",
1839                   ifp->ifidx, skb->len, siglen);
1840
1841         WARN_ON(siglen > skb->len);
1842
1843         if (!siglen)
1844                 return;
1845         /* if flow control disabled, skip to packet data and leave */
1846         if ((!fws) || (!fws->fw_signals)) {
1847                 skb_pull(skb, siglen);
1848                 return;
1849         }
1850
1851         fws->stats.header_pulls++;
1852         data_len = siglen;
1853         signal_data = skb->data;
1854
1855         status = BRCMF_FWS_RET_OK_NOSCHEDULE;
1856         while (data_len > 0) {
1857                 /* extract tlv info */
1858                 type = signal_data[0];
1859
1860                 /* FILLER type is actually not a TLV, but
1861                  * a single byte that can be skipped.
1862                  */
1863                 if (type == BRCMF_FWS_TYPE_FILLER) {
1864                         signal_data += 1;
1865                         data_len -= 1;
1866                         continue;
1867                 }
1868                 len = signal_data[1];
1869                 data = signal_data + 2;
1870
1871                 brcmf_dbg(HDRS, "tlv type=%s (%d), len=%d (%d)\n",
1872                           brcmf_fws_get_tlv_name(type), type, len,
1873                           brcmf_fws_get_tlv_len(fws, type));
1874
1875                 /* abort parsing when length invalid */
1876                 if (data_len < len + 2)
1877                         break;
1878
1879                 if (len < brcmf_fws_get_tlv_len(fws, type))
1880                         break;
1881
1882                 err = BRCMF_FWS_RET_OK_NOSCHEDULE;
1883                 switch (type) {
1884                 case BRCMF_FWS_TYPE_COMP_TXSTATUS:
1885                         break;
1886                 case BRCMF_FWS_TYPE_HOST_REORDER_RXPKTS:
1887                         rd = (struct brcmf_skb_reorder_data *)skb->cb;
1888                         rd->reorder = data;
1889                         break;
1890                 case BRCMF_FWS_TYPE_MACDESC_ADD:
1891                 case BRCMF_FWS_TYPE_MACDESC_DEL:
1892                         brcmf_fws_macdesc_indicate(fws, type, data);
1893                         break;
1894                 case BRCMF_FWS_TYPE_MAC_OPEN:
1895                 case BRCMF_FWS_TYPE_MAC_CLOSE:
1896                         err = brcmf_fws_macdesc_state_indicate(fws, type, data);
1897                         break;
1898                 case BRCMF_FWS_TYPE_INTERFACE_OPEN:
1899                 case BRCMF_FWS_TYPE_INTERFACE_CLOSE:
1900                         err = brcmf_fws_interface_state_indicate(fws, type,
1901                                                                  data);
1902                         break;
1903                 case BRCMF_FWS_TYPE_MAC_REQUEST_CREDIT:
1904                 case BRCMF_FWS_TYPE_MAC_REQUEST_PACKET:
1905                         err = brcmf_fws_request_indicate(fws, type, data);
1906                         break;
1907                 case BRCMF_FWS_TYPE_TXSTATUS:
1908                         brcmf_fws_txstatus_indicate(fws, data);
1909                         break;
1910                 case BRCMF_FWS_TYPE_FIFO_CREDITBACK:
1911                         err = brcmf_fws_fifocreditback_indicate(fws, data);
1912                         break;
1913                 case BRCMF_FWS_TYPE_RSSI:
1914                         brcmf_fws_rssi_indicate(fws, *data);
1915                         break;
1916                 case BRCMF_FWS_TYPE_TRANS_ID:
1917                         brcmf_fws_dbg_seqnum_check(fws, data);
1918                         break;
1919                 case BRCMF_FWS_TYPE_PKTTAG:
1920                 case BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP:
1921                 default:
1922                         fws->stats.tlv_invalid_type++;
1923                         break;
1924                 }
1925                 if (err == BRCMF_FWS_RET_OK_SCHEDULE)
1926                         status = BRCMF_FWS_RET_OK_SCHEDULE;
1927                 signal_data += len + 2;
1928                 data_len -= len + 2;
1929         }
1930
1931         if (data_len != 0)
1932                 fws->stats.tlv_parse_failed++;
1933
1934         if (status == BRCMF_FWS_RET_OK_SCHEDULE)
1935                 brcmf_fws_schedule_deq(fws);
1936
1937         /* signalling processing result does
1938          * not affect the actual ethernet packet.
1939          */
1940         skb_pull(skb, siglen);
1941
1942         /* this may be a signal-only packet
1943          */
1944         if (skb->len == 0)
1945                 fws->stats.header_only_pkt++;
1946 }
1947
1948 static u8 brcmf_fws_precommit_skb(struct brcmf_fws_info *fws, int fifo,
1949                                    struct sk_buff *p)
1950 {
1951         struct brcmf_skbuff_cb *skcb = brcmf_skbcb(p);
1952         struct brcmf_fws_mac_descriptor *entry = skcb->mac;
1953         u8 flags;
1954
1955         if (skcb->state != BRCMF_FWS_SKBSTATE_SUPPRESSED)
1956                 brcmf_skb_htod_tag_set_field(p, GENERATION, entry->generation);
1957         flags = BRCMF_FWS_HTOD_FLAG_PKTFROMHOST;
1958         if (brcmf_skb_if_flags_get_field(p, REQUESTED)) {
1959                 /*
1960                  * Indicate that this packet is being sent in response to an
1961                  * explicit request from the firmware side.
1962                  */
1963                 flags |= BRCMF_FWS_HTOD_FLAG_PKT_REQUESTED;
1964         }
1965         brcmf_skb_htod_tag_set_field(p, FLAGS, flags);
1966         return brcmf_fws_hdrpush(fws, p);
1967 }
1968
1969 static void brcmf_fws_rollback_toq(struct brcmf_fws_info *fws,
1970                                    struct sk_buff *skb, int fifo)
1971 {
1972         struct brcmf_fws_mac_descriptor *entry;
1973         struct sk_buff *pktout;
1974         int qidx, hslot;
1975         int rc = 0;
1976
1977         entry = brcmf_skbcb(skb)->mac;
1978         if (entry->occupied) {
1979                 qidx = 2 * fifo;
1980                 if (brcmf_skbcb(skb)->state == BRCMF_FWS_SKBSTATE_SUPPRESSED)
1981                         qidx++;
1982
1983                 pktout = brcmu_pktq_penq_head(&entry->psq, qidx, skb);
1984                 if (pktout == NULL) {
1985                         brcmf_err("%s queue %d full\n", entry->name, qidx);
1986                         rc = -ENOSPC;
1987                 }
1988         } else {
1989                 brcmf_err("%s entry removed\n", entry->name);
1990                 rc = -ENOENT;
1991         }
1992
1993         if (rc) {
1994                 fws->stats.rollback_failed++;
1995                 hslot = brcmf_skb_htod_tag_get_field(skb, HSLOT);
1996                 brcmf_fws_txs_process(fws, BRCMF_FWS_TXSTATUS_HOST_TOSSED,
1997                                       hslot, 0, 0);
1998         } else {
1999                 fws->stats.rollback_success++;
2000                 brcmf_fws_return_credits(fws, fifo, 1);
2001                 brcmf_fws_macdesc_return_req_credit(skb);
2002         }
2003 }
2004
2005 static int brcmf_fws_borrow_credit(struct brcmf_fws_info *fws)
2006 {
2007         int lender_ac;
2008
2009         if (time_after(fws->borrow_defer_timestamp, jiffies)) {
2010                 fws->fifo_credit_map &= ~(1 << BRCMF_FWS_FIFO_AC_BE);
2011                 return -ENAVAIL;
2012         }
2013
2014         for (lender_ac = 0; lender_ac <= BRCMF_FWS_FIFO_AC_VO; lender_ac++) {
2015                 if (fws->fifo_credit[lender_ac]) {
2016                         fws->credits_borrowed[lender_ac]++;
2017                         fws->fifo_credit[lender_ac]--;
2018                         if (fws->fifo_credit[lender_ac] == 0)
2019                                 fws->fifo_credit_map &= ~(1 << lender_ac);
2020                         fws->fifo_credit_map |= (1 << BRCMF_FWS_FIFO_AC_BE);
2021                         brcmf_dbg(DATA, "borrow credit from: %d\n", lender_ac);
2022                         return 0;
2023                 }
2024         }
2025         fws->fifo_credit_map &= ~(1 << BRCMF_FWS_FIFO_AC_BE);
2026         return -ENAVAIL;
2027 }
2028
2029 static int brcmf_fws_commit_skb(struct brcmf_fws_info *fws, int fifo,
2030                                 struct sk_buff *skb)
2031 {
2032         struct brcmf_skbuff_cb *skcb = brcmf_skbcb(skb);
2033         struct brcmf_fws_mac_descriptor *entry;
2034         int rc;
2035         u8 ifidx;
2036         u8 data_offset;
2037
2038         entry = skcb->mac;
2039         if (IS_ERR(entry))
2040                 return PTR_ERR(entry);
2041
2042         data_offset = brcmf_fws_precommit_skb(fws, fifo, skb);
2043         entry->transit_count++;
2044         if (entry->suppressed)
2045                 entry->suppr_transit_count++;
2046         ifidx = brcmf_skb_if_flags_get_field(skb, INDEX);
2047         brcmf_fws_unlock(fws);
2048         rc = brcmf_proto_txdata(fws->drvr, ifidx, data_offset, skb);
2049         brcmf_fws_lock(fws);
2050         brcmf_dbg(DATA, "%s flags %X htod %X bus_tx %d\n", entry->name,
2051                   skcb->if_flags, skcb->htod, rc);
2052         if (rc < 0) {
2053                 entry->transit_count--;
2054                 if (entry->suppressed)
2055                         entry->suppr_transit_count--;
2056                 (void)brcmf_proto_hdrpull(fws->drvr, false, skb, NULL);
2057                 goto rollback;
2058         }
2059
2060         fws->stats.pkt2bus++;
2061         fws->stats.send_pkts[fifo]++;
2062         if (brcmf_skb_if_flags_get_field(skb, REQUESTED))
2063                 fws->stats.requested_sent[fifo]++;
2064
2065         return rc;
2066
2067 rollback:
2068         brcmf_fws_rollback_toq(fws, skb, fifo);
2069         return rc;
2070 }
2071
2072 static int brcmf_fws_assign_htod(struct brcmf_fws_info *fws, struct sk_buff *p,
2073                                   int fifo)
2074 {
2075         struct brcmf_skbuff_cb *skcb = brcmf_skbcb(p);
2076         int rc, hslot;
2077
2078         skcb->htod = 0;
2079         skcb->htod_seq = 0;
2080         hslot = brcmf_fws_hanger_get_free_slot(&fws->hanger);
2081         brcmf_skb_htod_tag_set_field(p, HSLOT, hslot);
2082         brcmf_skb_htod_tag_set_field(p, FREERUN, skcb->mac->seq[fifo]);
2083         brcmf_skb_htod_tag_set_field(p, FIFO, fifo);
2084         rc = brcmf_fws_hanger_pushpkt(&fws->hanger, p, hslot);
2085         if (!rc)
2086                 skcb->mac->seq[fifo]++;
2087         else
2088                 fws->stats.generic_error++;
2089         return rc;
2090 }
2091
2092 int brcmf_fws_process_skb(struct brcmf_if *ifp, struct sk_buff *skb)
2093 {
2094         struct brcmf_pub *drvr = ifp->drvr;
2095         struct brcmf_fws_info *fws = drvr->fws;
2096         struct brcmf_skbuff_cb *skcb = brcmf_skbcb(skb);
2097         struct ethhdr *eh = (struct ethhdr *)(skb->data);
2098         int fifo = BRCMF_FWS_FIFO_BCMC;
2099         bool multicast = is_multicast_ether_addr(eh->h_dest);
2100         int rc = 0;
2101
2102         brcmf_dbg(DATA, "tx proto=0x%X\n", ntohs(eh->h_proto));
2103         /* determine the priority */
2104         if ((skb->priority == 0) || (skb->priority > 7))
2105                 skb->priority = cfg80211_classify8021d(skb, NULL);
2106
2107         drvr->tx_multicast += !!multicast;
2108
2109         if (fws->avoid_queueing) {
2110                 rc = brcmf_proto_txdata(drvr, ifp->ifidx, 0, skb);
2111                 if (rc < 0)
2112                         brcmf_txfinalize(ifp, skb, false);
2113                 return rc;
2114         }
2115
2116         /* set control buffer information */
2117         skcb->if_flags = 0;
2118         skcb->state = BRCMF_FWS_SKBSTATE_NEW;
2119         brcmf_skb_if_flags_set_field(skb, INDEX, ifp->ifidx);
2120         if (!multicast)
2121                 fifo = brcmf_fws_prio2fifo[skb->priority];
2122
2123         brcmf_fws_lock(fws);
2124         if (fifo != BRCMF_FWS_FIFO_AC_BE && fifo < BRCMF_FWS_FIFO_BCMC)
2125                 fws->borrow_defer_timestamp = jiffies +
2126                                               BRCMF_FWS_BORROW_DEFER_PERIOD;
2127
2128         skcb->mac = brcmf_fws_macdesc_find(fws, ifp, eh->h_dest);
2129         brcmf_dbg(DATA, "%s mac %pM multi %d fifo %d\n", skcb->mac->name,
2130                   eh->h_dest, multicast, fifo);
2131         if (!brcmf_fws_assign_htod(fws, skb, fifo)) {
2132                 brcmf_fws_enq(fws, BRCMF_FWS_SKBSTATE_DELAYED, fifo, skb);
2133                 brcmf_fws_schedule_deq(fws);
2134         } else {
2135                 brcmf_err("drop skb: no hanger slot\n");
2136                 brcmf_txfinalize(ifp, skb, false);
2137                 rc = -ENOMEM;
2138         }
2139         brcmf_fws_unlock(fws);
2140
2141         return rc;
2142 }
2143
2144 void brcmf_fws_reset_interface(struct brcmf_if *ifp)
2145 {
2146         struct brcmf_fws_mac_descriptor *entry = ifp->fws_desc;
2147
2148         brcmf_dbg(TRACE, "enter: bsscfgidx=%d\n", ifp->bsscfgidx);
2149         if (!entry)
2150                 return;
2151
2152         brcmf_fws_macdesc_init(entry, ifp->mac_addr, ifp->ifidx);
2153 }
2154
2155 void brcmf_fws_add_interface(struct brcmf_if *ifp)
2156 {
2157         struct brcmf_fws_info *fws = ifp->drvr->fws;
2158         struct brcmf_fws_mac_descriptor *entry;
2159
2160         if (!ifp->ndev)
2161                 return;
2162
2163         entry = &fws->desc.iface[ifp->ifidx];
2164         ifp->fws_desc = entry;
2165         brcmf_fws_macdesc_init(entry, ifp->mac_addr, ifp->ifidx);
2166         brcmf_fws_macdesc_set_name(fws, entry);
2167         brcmu_pktq_init(&entry->psq, BRCMF_FWS_PSQ_PREC_COUNT,
2168                         BRCMF_FWS_PSQ_LEN);
2169         brcmf_dbg(TRACE, "added %s\n", entry->name);
2170 }
2171
2172 void brcmf_fws_del_interface(struct brcmf_if *ifp)
2173 {
2174         struct brcmf_fws_mac_descriptor *entry = ifp->fws_desc;
2175
2176         if (!entry)
2177                 return;
2178
2179         brcmf_fws_lock(ifp->drvr->fws);
2180         ifp->fws_desc = NULL;
2181         brcmf_dbg(TRACE, "deleting %s\n", entry->name);
2182         brcmf_fws_macdesc_deinit(entry);
2183         brcmf_fws_cleanup(ifp->drvr->fws, ifp->ifidx);
2184         brcmf_fws_unlock(ifp->drvr->fws);
2185 }
2186
2187 static void brcmf_fws_dequeue_worker(struct work_struct *worker)
2188 {
2189         struct brcmf_fws_info *fws;
2190         struct brcmf_pub *drvr;
2191         struct sk_buff *skb;
2192         int fifo;
2193         u32 hslot;
2194         u32 ifidx;
2195         int ret;
2196
2197         fws = container_of(worker, struct brcmf_fws_info, fws_dequeue_work);
2198         drvr = fws->drvr;
2199
2200         brcmf_fws_lock(fws);
2201         for (fifo = BRCMF_FWS_FIFO_BCMC; fifo >= 0 && !fws->bus_flow_blocked;
2202              fifo--) {
2203                 if (!brcmf_fws_fc_active(fws)) {
2204                         while ((skb = brcmf_fws_deq(fws, fifo)) != NULL) {
2205                                 hslot = brcmf_skb_htod_tag_get_field(skb,
2206                                                                      HSLOT);
2207                                 brcmf_fws_hanger_poppkt(&fws->hanger, hslot,
2208                                                         &skb, true);
2209                                 ifidx = brcmf_skb_if_flags_get_field(skb,
2210                                                                      INDEX);
2211                                 /* Use proto layer to send data frame */
2212                                 brcmf_fws_unlock(fws);
2213                                 ret = brcmf_proto_txdata(drvr, ifidx, 0, skb);
2214                                 brcmf_fws_lock(fws);
2215                                 if (ret < 0)
2216                                         brcmf_txfinalize(brcmf_get_ifp(drvr,
2217                                                                        ifidx),
2218                                                          skb, false);
2219                                 if (fws->bus_flow_blocked)
2220                                         break;
2221                         }
2222                         continue;
2223                 }
2224                 while ((fws->fifo_credit[fifo]) || ((!fws->bcmc_credit_check) &&
2225                        (fifo == BRCMF_FWS_FIFO_BCMC))) {
2226                         skb = brcmf_fws_deq(fws, fifo);
2227                         if (!skb)
2228                                 break;
2229                         fws->fifo_credit[fifo]--;
2230                         if (brcmf_fws_commit_skb(fws, fifo, skb))
2231                                 break;
2232                         if (fws->bus_flow_blocked)
2233                                 break;
2234                 }
2235                 if ((fifo == BRCMF_FWS_FIFO_AC_BE) &&
2236                     (fws->fifo_credit[fifo] == 0) &&
2237                     (!fws->bus_flow_blocked)) {
2238                         while (brcmf_fws_borrow_credit(fws) == 0) {
2239                                 skb = brcmf_fws_deq(fws, fifo);
2240                                 if (!skb) {
2241                                         brcmf_fws_return_credits(fws, fifo, 1);
2242                                         break;
2243                                 }
2244                                 if (brcmf_fws_commit_skb(fws, fifo, skb))
2245                                         break;
2246                                 if (fws->bus_flow_blocked)
2247                                         break;
2248                         }
2249                 }
2250         }
2251         brcmf_fws_unlock(fws);
2252 }
2253
2254 #ifdef DEBUG
2255 static int brcmf_debugfs_fws_stats_read(struct seq_file *seq, void *data)
2256 {
2257         struct brcmf_bus *bus_if = dev_get_drvdata(seq->private);
2258         struct brcmf_fws_stats *fwstats = &bus_if->drvr->fws->stats;
2259
2260         seq_printf(seq,
2261                    "header_pulls:      %u\n"
2262                    "header_only_pkt:   %u\n"
2263                    "tlv_parse_failed:  %u\n"
2264                    "tlv_invalid_type:  %u\n"
2265                    "mac_update_fails:  %u\n"
2266                    "ps_update_fails:   %u\n"
2267                    "if_update_fails:   %u\n"
2268                    "pkt2bus:           %u\n"
2269                    "generic_error:     %u\n"
2270                    "rollback_success:  %u\n"
2271                    "rollback_failed:   %u\n"
2272                    "delayq_full:       %u\n"
2273                    "supprq_full:       %u\n"
2274                    "txs_indicate:      %u\n"
2275                    "txs_discard:       %u\n"
2276                    "txs_suppr_core:    %u\n"
2277                    "txs_suppr_ps:      %u\n"
2278                    "txs_tossed:        %u\n"
2279                    "txs_host_tossed:   %u\n"
2280                    "bus_flow_block:    %u\n"
2281                    "fws_flow_block:    %u\n"
2282                    "send_pkts:         BK:%u BE:%u VO:%u VI:%u BCMC:%u\n"
2283                    "requested_sent:    BK:%u BE:%u VO:%u VI:%u BCMC:%u\n",
2284                    fwstats->header_pulls,
2285                    fwstats->header_only_pkt,
2286                    fwstats->tlv_parse_failed,
2287                    fwstats->tlv_invalid_type,
2288                    fwstats->mac_update_failed,
2289                    fwstats->mac_ps_update_failed,
2290                    fwstats->if_update_failed,
2291                    fwstats->pkt2bus,
2292                    fwstats->generic_error,
2293                    fwstats->rollback_success,
2294                    fwstats->rollback_failed,
2295                    fwstats->delayq_full_error,
2296                    fwstats->supprq_full_error,
2297                    fwstats->txs_indicate,
2298                    fwstats->txs_discard,
2299                    fwstats->txs_supp_core,
2300                    fwstats->txs_supp_ps,
2301                    fwstats->txs_tossed,
2302                    fwstats->txs_host_tossed,
2303                    fwstats->bus_flow_block,
2304                    fwstats->fws_flow_block,
2305                    fwstats->send_pkts[0], fwstats->send_pkts[1],
2306                    fwstats->send_pkts[2], fwstats->send_pkts[3],
2307                    fwstats->send_pkts[4],
2308                    fwstats->requested_sent[0],
2309                    fwstats->requested_sent[1],
2310                    fwstats->requested_sent[2],
2311                    fwstats->requested_sent[3],
2312                    fwstats->requested_sent[4]);
2313
2314         return 0;
2315 }
2316 #else
2317 static int brcmf_debugfs_fws_stats_read(struct seq_file *seq, void *data)
2318 {
2319         return 0;
2320 }
2321 #endif
2322
2323 int brcmf_fws_init(struct brcmf_pub *drvr)
2324 {
2325         struct brcmf_fws_info *fws;
2326         struct brcmf_if *ifp;
2327         u32 tlv = BRCMF_FWS_FLAGS_RSSI_SIGNALS;
2328         int rc;
2329         u32 mode;
2330
2331         drvr->fws = kzalloc(sizeof(*(drvr->fws)), GFP_KERNEL);
2332         if (!drvr->fws) {
2333                 rc = -ENOMEM;
2334                 goto fail;
2335         }
2336
2337         fws = drvr->fws;
2338
2339         spin_lock_init(&fws->spinlock);
2340
2341         /* set linkage back */
2342         fws->drvr = drvr;
2343         fws->fcmode = drvr->settings->fcmode;
2344
2345         if ((drvr->bus_if->always_use_fws_queue == false) &&
2346             (fws->fcmode == BRCMF_FWS_FCMODE_NONE)) {
2347                 fws->avoid_queueing = true;
2348                 brcmf_dbg(INFO, "FWS queueing will be avoided\n");
2349                 return 0;
2350         }
2351
2352         fws->fws_wq = create_singlethread_workqueue("brcmf_fws_wq");
2353         if (fws->fws_wq == NULL) {
2354                 brcmf_err("workqueue creation failed\n");
2355                 rc = -EBADF;
2356                 goto fail;
2357         }
2358         INIT_WORK(&fws->fws_dequeue_work, brcmf_fws_dequeue_worker);
2359
2360         /* enable firmware signalling if fcmode active */
2361         if (fws->fcmode != BRCMF_FWS_FCMODE_NONE)
2362                 tlv |= BRCMF_FWS_FLAGS_XONXOFF_SIGNALS |
2363                        BRCMF_FWS_FLAGS_CREDIT_STATUS_SIGNALS |
2364                        BRCMF_FWS_FLAGS_HOST_PROPTXSTATUS_ACTIVE |
2365                        BRCMF_FWS_FLAGS_HOST_RXREORDER_ACTIVE;
2366
2367         rc = brcmf_fweh_register(drvr, BRCMF_E_FIFO_CREDIT_MAP,
2368                                  brcmf_fws_notify_credit_map);
2369         if (rc < 0) {
2370                 brcmf_err("register credit map handler failed\n");
2371                 goto fail;
2372         }
2373         rc = brcmf_fweh_register(drvr, BRCMF_E_BCMC_CREDIT_SUPPORT,
2374                                  brcmf_fws_notify_bcmc_credit_support);
2375         if (rc < 0) {
2376                 brcmf_err("register bcmc credit handler failed\n");
2377                 brcmf_fweh_unregister(drvr, BRCMF_E_FIFO_CREDIT_MAP);
2378                 goto fail;
2379         }
2380
2381         /* Setting the iovar may fail if feature is unsupported
2382          * so leave the rc as is so driver initialization can
2383          * continue. Set mode back to none indicating not enabled.
2384          */
2385         fws->fw_signals = true;
2386         ifp = brcmf_get_ifp(drvr, 0);
2387         if (brcmf_fil_iovar_int_set(ifp, "tlv", tlv)) {
2388                 brcmf_err("failed to set bdcv2 tlv signaling\n");
2389                 fws->fcmode = BRCMF_FWS_FCMODE_NONE;
2390                 fws->fw_signals = false;
2391         }
2392
2393         if (brcmf_fil_iovar_int_set(ifp, "ampdu_hostreorder", 1))
2394                 brcmf_dbg(INFO, "enabling AMPDU host-reorder failed\n");
2395
2396         /* Enable seq number reuse, if supported */
2397         if (brcmf_fil_iovar_int_get(ifp, "wlfc_mode", &mode) == 0) {
2398                 if (BRCMF_FWS_MODE_GET_REUSESEQ(mode)) {
2399                         mode = 0;
2400                         BRCMF_FWS_MODE_SET_REUSESEQ(mode, 1);
2401                         if (brcmf_fil_iovar_int_set(ifp,
2402                                                     "wlfc_mode", mode) == 0) {
2403                                 BRCMF_FWS_MODE_SET_REUSESEQ(fws->mode, 1);
2404                         }
2405                 }
2406         }
2407
2408         brcmf_fws_hanger_init(&fws->hanger);
2409         brcmf_fws_macdesc_init(&fws->desc.other, NULL, 0);
2410         brcmf_fws_macdesc_set_name(fws, &fws->desc.other);
2411         brcmu_pktq_init(&fws->desc.other.psq, BRCMF_FWS_PSQ_PREC_COUNT,
2412                         BRCMF_FWS_PSQ_LEN);
2413
2414         /* create debugfs file for statistics */
2415         brcmf_debugfs_add_entry(drvr, "fws_stats",
2416                                 brcmf_debugfs_fws_stats_read);
2417
2418         brcmf_dbg(INFO, "%s bdcv2 tlv signaling [%x]\n",
2419                   fws->fw_signals ? "enabled" : "disabled", tlv);
2420         return 0;
2421
2422 fail:
2423         brcmf_fws_deinit(drvr);
2424         return rc;
2425 }
2426
2427 void brcmf_fws_deinit(struct brcmf_pub *drvr)
2428 {
2429         struct brcmf_fws_info *fws = drvr->fws;
2430
2431         if (!fws)
2432                 return;
2433
2434         if (drvr->fws->fws_wq)
2435                 destroy_workqueue(drvr->fws->fws_wq);
2436
2437         /* cleanup */
2438         brcmf_fws_lock(fws);
2439         brcmf_fws_cleanup(fws, -1);
2440         drvr->fws = NULL;
2441         brcmf_fws_unlock(fws);
2442
2443         /* free top structure */
2444         kfree(fws);
2445 }
2446
2447 bool brcmf_fws_fc_active(struct brcmf_fws_info *fws)
2448 {
2449         if (!fws->creditmap_received)
2450                 return false;
2451
2452         return fws->fcmode != BRCMF_FWS_FCMODE_NONE;
2453 }
2454
2455 void brcmf_fws_bustxfail(struct brcmf_fws_info *fws, struct sk_buff *skb)
2456 {
2457         u32 hslot;
2458
2459         if (brcmf_skbcb(skb)->state == BRCMF_FWS_SKBSTATE_TIM) {
2460                 brcmu_pkt_buf_free_skb(skb);
2461                 return;
2462         }
2463         brcmf_fws_lock(fws);
2464         hslot = brcmf_skb_htod_tag_get_field(skb, HSLOT);
2465         brcmf_fws_txs_process(fws, BRCMF_FWS_TXSTATUS_HOST_TOSSED, hslot, 0, 0);
2466         brcmf_fws_unlock(fws);
2467 }
2468
2469 void brcmf_fws_bus_blocked(struct brcmf_pub *drvr, bool flow_blocked)
2470 {
2471         struct brcmf_fws_info *fws = drvr->fws;
2472         struct brcmf_if *ifp;
2473         int i;
2474
2475         if (fws->avoid_queueing) {
2476                 for (i = 0; i < BRCMF_MAX_IFS; i++) {
2477                         ifp = drvr->iflist[i];
2478                         if (!ifp || !ifp->ndev)
2479                                 continue;
2480                         brcmf_txflowblock_if(ifp, BRCMF_NETIF_STOP_REASON_FLOW,
2481                                              flow_blocked);
2482                 }
2483         } else {
2484                 fws->bus_flow_blocked = flow_blocked;
2485                 if (!flow_blocked)
2486                         brcmf_fws_schedule_deq(fws);
2487                 else
2488                         fws->stats.bus_flow_block++;
2489         }
2490 }