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brcmfmac: simplify transmit path
[deliverable/linux.git] / drivers / net / wireless / brcm80211 / brcmfmac / fwsignal.c
CommitLineData
349e7104
AS		 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>
c7f34a69 17#include <linux/module.h>
349e7104
AS		 18#include <linux/if_ether.h>
19#include <linux/spinlock.h>
20#include <linux/skbuff.h>
21#include <linux/netdevice.h>
3edc1cff 22#include <linux/etherdevice.h>
349e7104 23#include <linux/err.h>
1aac1e91 24#include <linux/jiffies.h>
3edc1cff 25#include <net/cfg80211.h>
349e7104
AS		 26
27#include <brcmu_utils.h>
28#include <brcmu_wifi.h>
29#include "dhd.h"
3edc1cff 30#include "dhd_proto.h"
349e7104 31#include "dhd_dbg.h"
e2432b67 32#include "dhd_bus.h"
349e7104 33#include "fwil.h"
a7965fbb 34#include "fwil_types.h"
349e7104
AS		 35#include "fweh.h"
36#include "fwsignal.h"
a7965fbb
AS		 37#include "p2p.h"
38#include "wl_cfg80211.h"
349e7104
AS		 39
40/**
41 * DOC: Firmware Signalling
42 *
43 * Firmware can send signals to host and vice versa, which are passed in the
44 * data packets using TLV based header. This signalling layer is on top of the
45 * BDC bus protocol layer.
46 */
47
48/*
49 * single definition for firmware-driver flow control tlv's.
50 *
51 * each tlv is specified by BRCMF_FWS_TLV_DEF(name, ID, length).
52 * A length value 0 indicates variable length tlv.
53 */
54#define BRCMF_FWS_TLV_DEFLIST \
55 BRCMF_FWS_TLV_DEF(MAC_OPEN, 1, 1) \
56 BRCMF_FWS_TLV_DEF(MAC_CLOSE, 2, 1) \
57 BRCMF_FWS_TLV_DEF(MAC_REQUEST_CREDIT, 3, 2) \
58 BRCMF_FWS_TLV_DEF(TXSTATUS, 4, 4) \
59 BRCMF_FWS_TLV_DEF(PKTTAG, 5, 4) \
60 BRCMF_FWS_TLV_DEF(MACDESC_ADD, 6, 8) \
61 BRCMF_FWS_TLV_DEF(MACDESC_DEL, 7, 8) \
62 BRCMF_FWS_TLV_DEF(RSSI, 8, 1) \
63 BRCMF_FWS_TLV_DEF(INTERFACE_OPEN, 9, 1) \
64 BRCMF_FWS_TLV_DEF(INTERFACE_CLOSE, 10, 1) \
94607238 65 BRCMF_FWS_TLV_DEF(FIFO_CREDITBACK, 11, 6) \
349e7104
AS		 66 BRCMF_FWS_TLV_DEF(PENDING_TRAFFIC_BMP, 12, 2) \
67 BRCMF_FWS_TLV_DEF(MAC_REQUEST_PACKET, 13, 3) \
68 BRCMF_FWS_TLV_DEF(HOST_REORDER_RXPKTS, 14, 10) \
69 BRCMF_FWS_TLV_DEF(TRANS_ID, 18, 6) \
70 BRCMF_FWS_TLV_DEF(COMP_TXSTATUS, 19, 1) \
71 BRCMF_FWS_TLV_DEF(FILLER, 255, 0)
72
3edc1cff 73/*
349e7104
AS		 74 * enum brcmf_fws_tlv_type - definition of tlv identifiers.
75 */
76#define BRCMF_FWS_TLV_DEF(name, id, len) \
77 BRCMF_FWS_TYPE_ ## name = id,
78enum brcmf_fws_tlv_type {
79 BRCMF_FWS_TLV_DEFLIST
80 BRCMF_FWS_TYPE_INVALID
81};
82#undef BRCMF_FWS_TLV_DEF
83
3edc1cff
AS		 84/*
85 * enum brcmf_fws_tlv_len - definition of tlv lengths.
86 */
87#define BRCMF_FWS_TLV_DEF(name, id, len) \
88 BRCMF_FWS_TYPE_ ## name ## _LEN = (len),
89enum brcmf_fws_tlv_len {
90 BRCMF_FWS_TLV_DEFLIST
91};
92#undef BRCMF_FWS_TLV_DEF
93
349e7104 94#ifdef DEBUG
3edc1cff 95/*
349e7104
AS		 96 * brcmf_fws_tlv_names - array of tlv names.
97 */
98#define BRCMF_FWS_TLV_DEF(name, id, len) \
99 { id, #name },
100static struct {
101 enum brcmf_fws_tlv_type id;
102 const char *name;
103} brcmf_fws_tlv_names[] = {
104 BRCMF_FWS_TLV_DEFLIST
105};
106#undef BRCMF_FWS_TLV_DEF
107
108static const char *brcmf_fws_get_tlv_name(enum brcmf_fws_tlv_type id)
109{
110 int i;
111
112 for (i = 0; i < ARRAY_SIZE(brcmf_fws_tlv_names); i++)
113 if (brcmf_fws_tlv_names[i].id == id)
114 return brcmf_fws_tlv_names[i].name;
115
116 return "INVALID";
117}
118#else
119static const char *brcmf_fws_get_tlv_name(enum brcmf_fws_tlv_type id)
120{
121 return "NODEBUG";
122}
123#endif /* DEBUG */
124
3edc1cff 125/*
349e7104
AS		 126 * flags used to enable tlv signalling from firmware.
127 */
bb8c8063
AS		 128#define BRCMF_FWS_FLAGS_RSSI_SIGNALS 0x0001
129#define BRCMF_FWS_FLAGS_XONXOFF_SIGNALS 0x0002
130#define BRCMF_FWS_FLAGS_CREDIT_STATUS_SIGNALS 0x0004
131#define BRCMF_FWS_FLAGS_HOST_PROPTXSTATUS_ACTIVE 0x0008
132#define BRCMF_FWS_FLAGS_PSQ_GENERATIONFSM_ENABLE 0x0010
133#define BRCMF_FWS_FLAGS_PSQ_ZERO_BUFFER_ENABLE 0x0020
134#define BRCMF_FWS_FLAGS_HOST_RXREORDER_ACTIVE 0x0040
135
349e7104 136#define BRCMF_FWS_MAC_DESC_TABLE_SIZE 32
349e7104
AS		 137#define BRCMF_FWS_MAC_DESC_ID_INVALID 0xff
138
139#define BRCMF_FWS_HOSTIF_FLOWSTATE_OFF 0
140#define BRCMF_FWS_HOSTIF_FLOWSTATE_ON 1
84bcc0c3
AS		 141#define BRCMF_FWS_FLOWCONTROL_HIWATER 128
142#define BRCMF_FWS_FLOWCONTROL_LOWATER 64
349e7104 143
ae664609 144#define BRCMF_FWS_PSQ_PREC_COUNT ((BRCMF_FWS_FIFO_COUNT + 1) * 2)
bb8c8063
AS		 145#define BRCMF_FWS_PSQ_LEN 256
146
3edc1cff
AS		 147#define BRCMF_FWS_HTOD_FLAG_PKTFROMHOST 0x01
148#define BRCMF_FWS_HTOD_FLAG_PKT_REQUESTED 0x02
149
a5e9d805
AS		 150#define BRCMF_FWS_RET_OK_NOSCHEDULE 0
151#define BRCMF_FWS_RET_OK_SCHEDULE 1
152
ebb93883
AS		 153/**
154 * enum brcmf_fws_skb_state - indicates processing state of skb.
3edc1cff
AS		 155 *
156 * @BRCMF_FWS_SKBSTATE_NEW: sk_buff is newly arrived in the driver.
157 * @BRCMF_FWS_SKBSTATE_DELAYED: sk_buff had to wait on queue.
158 * @BRCMF_FWS_SKBSTATE_SUPPRESSED: sk_buff has been suppressed by firmware.
c7773fc1 159 * @BRCMF_FWS_SKBSTATE_TIM: allocated for TIM update info.
ebb93883
AS		 160 */
161enum brcmf_fws_skb_state {
3edc1cff
AS		 162 BRCMF_FWS_SKBSTATE_NEW,
163 BRCMF_FWS_SKBSTATE_DELAYED,
c7773fc1
AS		 164 BRCMF_FWS_SKBSTATE_SUPPRESSED,
165 BRCMF_FWS_SKBSTATE_TIM
ebb93883
AS		 166};
167
168/**
169 * struct brcmf_skbuff_cb - control buffer associated with skbuff.
170 *
171 * @if_flags: holds interface index and packet related flags.
ebb93883 172 * @htod: host to device packet identifier (used in PKTTAG tlv).
ebb93883
AS		 173 * @state: transmit state of the packet.
174 * @mac: descriptor related to destination for this packet.
175 *
176 * This information is stored in control buffer struct sk_buff::cb, which
177 * provides 48 bytes of storage so this structure should not exceed that.
178 */
179struct brcmf_skbuff_cb {
180 u16 if_flags;
ebb93883 181 u32 htod;
ebb93883
AS		 182 enum brcmf_fws_skb_state state;
183 struct brcmf_fws_mac_descriptor *mac;
184};
185
3edc1cff 186/*
ebb93883
AS		 187 * macro casting skbuff control buffer to struct brcmf_skbuff_cb.
188 */
189#define brcmf_skbcb(skb) ((struct brcmf_skbuff_cb *)((skb)->cb))
190
3edc1cff 191/*
ebb93883
AS		 192 * sk_buff control if flags
193 *
fa587d4b 194 * b[11] - packet sent upon firmware request.
ebb93883
AS		 195 * b[10] - packet only contains signalling data.
196 * b[9] - packet is a tx packet.
fa587d4b 197 * b[8] - packet used requested credit
ebb93883 198 * b[7] - interface in AP mode.
ebb93883
AS		 199 * b[3:0] - interface index.
200 */
201#define BRCMF_SKB_IF_FLAGS_REQUESTED_MASK 0x0800
202#define BRCMF_SKB_IF_FLAGS_REQUESTED_SHIFT 11
203#define BRCMF_SKB_IF_FLAGS_SIGNAL_ONLY_MASK 0x0400
204#define BRCMF_SKB_IF_FLAGS_SIGNAL_ONLY_SHIFT 10
205#define BRCMF_SKB_IF_FLAGS_TRANSMIT_MASK 0x0200
206#define BRCMF_SKB_IF_FLAGS_TRANSMIT_SHIFT 9
fa587d4b
HM		 207#define BRCMF_SKB_IF_FLAGS_REQ_CREDIT_MASK 0x0100
208#define BRCMF_SKB_IF_FLAGS_REQ_CREDIT_SHIFT 8
ebb93883
AS		 209#define BRCMF_SKB_IF_FLAGS_IF_AP_MASK 0x0080
210#define BRCMF_SKB_IF_FLAGS_IF_AP_SHIFT 7
ebb93883
AS		 211#define BRCMF_SKB_IF_FLAGS_INDEX_MASK 0x000f
212#define BRCMF_SKB_IF_FLAGS_INDEX_SHIFT 0
213
214#define brcmf_skb_if_flags_set_field(skb, field, value) \
215 brcmu_maskset16(&(brcmf_skbcb(skb)->if_flags), \
216 BRCMF_SKB_IF_FLAGS_ ## field ## _MASK, \
217 BRCMF_SKB_IF_FLAGS_ ## field ## _SHIFT, (value))
218#define brcmf_skb_if_flags_get_field(skb, field) \
219 brcmu_maskget16(brcmf_skbcb(skb)->if_flags, \
220 BRCMF_SKB_IF_FLAGS_ ## field ## _MASK, \
221 BRCMF_SKB_IF_FLAGS_ ## field ## _SHIFT)
222
3edc1cff 223/*
ebb93883
AS		 224 * sk_buff control packet identifier
225 *
226 * 32-bit packet identifier used in PKTTAG tlv from host to dongle.
227 *
228 * - Generated at the host (e.g. dhd)
229 * - Seen as a generic sequence number by firmware except for the flags field.
230 *
231 * Generation : b[31] => generation number for this packet [host->fw]
232 * OR, current generation number [fw->host]
233 * Flags : b[30:27] => command, status flags
234 * FIFO-AC : b[26:24] => AC-FIFO id
235 * h-slot : b[23:8] => hanger-slot
236 * freerun : b[7:0] => A free running counter
237 */
238#define BRCMF_SKB_HTOD_TAG_GENERATION_MASK 0x80000000
239#define BRCMF_SKB_HTOD_TAG_GENERATION_SHIFT 31
240#define BRCMF_SKB_HTOD_TAG_FLAGS_MASK 0x78000000
241#define BRCMF_SKB_HTOD_TAG_FLAGS_SHIFT 27
242#define BRCMF_SKB_HTOD_TAG_FIFO_MASK 0x07000000
243#define BRCMF_SKB_HTOD_TAG_FIFO_SHIFT 24
244#define BRCMF_SKB_HTOD_TAG_HSLOT_MASK 0x00ffff00
245#define BRCMF_SKB_HTOD_TAG_HSLOT_SHIFT 8
246#define BRCMF_SKB_HTOD_TAG_FREERUN_MASK 0x000000ff
be4910ad 247#define BRCMF_SKB_HTOD_TAG_FREERUN_SHIFT 0
ebb93883
AS		 248
249#define brcmf_skb_htod_tag_set_field(skb, field, value) \
e2432b67 250 brcmu_maskset32(&(brcmf_skbcb(skb)->htod), \
ebb93883
AS		 251 BRCMF_SKB_HTOD_TAG_ ## field ## _MASK, \
252 BRCMF_SKB_HTOD_TAG_ ## field ## _SHIFT, (value))
253#define brcmf_skb_htod_tag_get_field(skb, field) \
e2432b67 254 brcmu_maskget32(brcmf_skbcb(skb)->htod, \
ebb93883
AS		 255 BRCMF_SKB_HTOD_TAG_ ## field ## _MASK, \
256 BRCMF_SKB_HTOD_TAG_ ## field ## _SHIFT)
257
3edc1cff
AS		 258#define BRCMF_FWS_TXSTAT_GENERATION_MASK 0x80000000
259#define BRCMF_FWS_TXSTAT_GENERATION_SHIFT 31
260#define BRCMF_FWS_TXSTAT_FLAGS_MASK 0x78000000
261#define BRCMF_FWS_TXSTAT_FLAGS_SHIFT 27
262#define BRCMF_FWS_TXSTAT_FIFO_MASK 0x07000000
263#define BRCMF_FWS_TXSTAT_FIFO_SHIFT 24
264#define BRCMF_FWS_TXSTAT_HSLOT_MASK 0x00FFFF00
265#define BRCMF_FWS_TXSTAT_HSLOT_SHIFT 8
266#define BRCMF_FWS_TXSTAT_PKTID_MASK 0x00FFFFFF
267#define BRCMF_FWS_TXSTAT_PKTID_SHIFT 0
268
269#define brcmf_txstatus_get_field(txs, field) \
270 brcmu_maskget32(txs, BRCMF_FWS_TXSTAT_ ## field ## _MASK, \
271 BRCMF_FWS_TXSTAT_ ## field ## _SHIFT)
272
1aac1e91
AS		 273/* How long to defer borrowing in jiffies */
274#define BRCMF_FWS_BORROW_DEFER_PERIOD (HZ / 10)
275
3edc1cff
AS		 276/**
277 * enum brcmf_fws_fifo - fifo indices used by dongle firmware.
278 *
c7773fc1 279 * @BRCMF_FWS_FIFO_FIRST: first fifo, ie. background.
3edc1cff
AS		 280 * @BRCMF_FWS_FIFO_AC_BK: fifo for background traffic.
281 * @BRCMF_FWS_FIFO_AC_BE: fifo for best-effort traffic.
282 * @BRCMF_FWS_FIFO_AC_VI: fifo for video traffic.
283 * @BRCMF_FWS_FIFO_AC_VO: fifo for voice traffic.
284 * @BRCMF_FWS_FIFO_BCMC: fifo for broadcast/multicast (AP only).
285 * @BRCMF_FWS_FIFO_ATIM: fifo for ATIM (AP only).
286 * @BRCMF_FWS_FIFO_COUNT: number of fifos.
287 */
288enum brcmf_fws_fifo {
c7773fc1
AS		 289 BRCMF_FWS_FIFO_FIRST,
290 BRCMF_FWS_FIFO_AC_BK = BRCMF_FWS_FIFO_FIRST,
3edc1cff
AS		 291 BRCMF_FWS_FIFO_AC_BE,
292 BRCMF_FWS_FIFO_AC_VI,
293 BRCMF_FWS_FIFO_AC_VO,
294 BRCMF_FWS_FIFO_BCMC,
295 BRCMF_FWS_FIFO_ATIM,
296 BRCMF_FWS_FIFO_COUNT
297};
298
299/**
300 * enum brcmf_fws_txstatus - txstatus flag values.
301 *
302 * @BRCMF_FWS_TXSTATUS_DISCARD:
303 * host is free to discard the packet.
304 * @BRCMF_FWS_TXSTATUS_CORE_SUPPRESS:
305 * 802.11 core suppressed the packet.
306 * @BRCMF_FWS_TXSTATUS_FW_PS_SUPPRESS:
307 * firmware suppress the packet as device is already in PS mode.
308 * @BRCMF_FWS_TXSTATUS_FW_TOSSED:
309 * firmware tossed the packet.
fa587d4b
HM		 310 * @BRCMF_FWS_TXSTATUS_HOST_TOSSED:
311 * host tossed the packet.
3edc1cff
AS		 312 */
313enum brcmf_fws_txstatus {
314 BRCMF_FWS_TXSTATUS_DISCARD,
315 BRCMF_FWS_TXSTATUS_CORE_SUPPRESS,
316 BRCMF_FWS_TXSTATUS_FW_PS_SUPPRESS,
fa587d4b
HM		 317 BRCMF_FWS_TXSTATUS_FW_TOSSED,
318 BRCMF_FWS_TXSTATUS_HOST_TOSSED
3edc1cff
AS		 319};
320
c7f34a69
AS		 321enum brcmf_fws_fcmode {
322 BRCMF_FWS_FCMODE_NONE,
323 BRCMF_FWS_FCMODE_IMPLIED_CREDIT,
324 BRCMF_FWS_FCMODE_EXPLICIT_CREDIT
325};
326
84bcc0c3
AS		 327enum brcmf_fws_mac_desc_state {
328 BRCMF_FWS_STATE_OPEN = 1,
329 BRCMF_FWS_STATE_CLOSE
330};
331
bb8c8063
AS		 332/**
333 * struct brcmf_fws_mac_descriptor - firmware signalling data per node/interface
334 *
335 * @occupied: slot is in use.
ce814c1b 336 * @mac_handle: handle for mac entry determined by firmware.
bb8c8063
AS		 337 * @interface_id: interface index.
338 * @state: current state.
3edc1cff
AS		 339 * @suppressed: mac entry is suppressed.
340 * @generation: generation bit.
bb8c8063
AS		 341 * @ac_bitmap: ac queue bitmap.
342 * @requested_credit: credits requested by firmware.
343 * @ea: ethernet address.
3edc1cff 344 * @seq: per-node free-running sequence.
bb8c8063 345 * @psq: power-save queue.
3edc1cff 346 * @transit_count: packet in transit to firmware.
bb8c8063
AS		 347 */
348struct brcmf_fws_mac_descriptor {
8071fd61 349 char name[16];
bb8c8063 350 u8 occupied;
ce814c1b 351 u8 mac_handle;
bb8c8063
AS		 352 u8 interface_id;
353 u8 state;
3edc1cff
AS		 354 bool suppressed;
355 u8 generation;
bb8c8063
AS		 356 u8 ac_bitmap;
357 u8 requested_credit;
84bcc0c3 358 u8 requested_packet;
bb8c8063 359 u8 ea[ETH_ALEN];
3edc1cff 360 u8 seq[BRCMF_FWS_FIFO_COUNT];
bb8c8063 361 struct pktq psq;
3edc1cff 362 int transit_count;
84bcc0c3
AS		 363 int suppr_transit_count;
364 bool send_tim_signal;
365 u8 traffic_pending_bmp;
366 u8 traffic_lastreported_bmp;
bb8c8063
AS		 367};
368
6971280a
AS		 369#define BRCMF_FWS_HANGER_MAXITEMS 1024
370
371/**
372 * enum brcmf_fws_hanger_item_state - state of hanger item.
373 *
3edc1cff
AS		 374 * @BRCMF_FWS_HANGER_ITEM_STATE_FREE: item is free for use.
375 * @BRCMF_FWS_HANGER_ITEM_STATE_INUSE: item is in use.
376 * @BRCMF_FWS_HANGER_ITEM_STATE_INUSE_SUPPRESSED: item was suppressed.
6971280a
AS		 377 */
378enum brcmf_fws_hanger_item_state {
3edc1cff
AS		 379 BRCMF_FWS_HANGER_ITEM_STATE_FREE = 1,
380 BRCMF_FWS_HANGER_ITEM_STATE_INUSE,
381 BRCMF_FWS_HANGER_ITEM_STATE_INUSE_SUPPRESSED
6971280a
AS		 382};
383
384
385/**
386 * struct brcmf_fws_hanger_item - single entry for tx pending packet.
387 *
388 * @state: entry is either free or occupied.
6971280a
AS		 389 * @pkt: packet itself.
390 */
391struct brcmf_fws_hanger_item {
392 enum brcmf_fws_hanger_item_state state;
6971280a
AS		 393 struct sk_buff *pkt;
394};
395
396/**
397 * struct brcmf_fws_hanger - holds packets awaiting firmware txstatus.
398 *
6971280a
AS		 399 * @pushed: packets pushed to await txstatus.
400 * @popped: packets popped upon handling txstatus.
401 * @failed_to_push: packets that could not be pushed.
402 * @failed_to_pop: packets that could not be popped.
403 * @failed_slotfind: packets for which failed to find an entry.
404 * @slot_pos: last returned item index for a free entry.
405 * @items: array of hanger items.
406 */
407struct brcmf_fws_hanger {
408 u32 pushed;
409 u32 popped;
410 u32 failed_to_push;
411 u32 failed_to_pop;
412 u32 failed_slotfind;
413 u32 slot_pos;
414 struct brcmf_fws_hanger_item items[BRCMF_FWS_HANGER_MAXITEMS];
415};
416
84bcc0c3
AS		 417struct brcmf_fws_macdesc_table {
418 struct brcmf_fws_mac_descriptor nodes[BRCMF_FWS_MAC_DESC_TABLE_SIZE];
419 struct brcmf_fws_mac_descriptor iface[BRCMF_MAX_IFS];
420 struct brcmf_fws_mac_descriptor other;
421};
422
349e7104
AS		 423struct brcmf_fws_info {
424 struct brcmf_pub *drvr;
425 struct brcmf_fws_stats stats;
6971280a 426 struct brcmf_fws_hanger hanger;
c7f34a69 427 enum brcmf_fws_fcmode fcmode;
7d747037 428 bool bcmc_credit_check;
84bcc0c3
AS		 429 struct brcmf_fws_macdesc_table desc;
430 struct workqueue_struct *fws_wq;
431 struct work_struct fws_dequeue_work;
432 u32 fifo_enqpkt[BRCMF_FWS_FIFO_COUNT];
3edc1cff 433 int fifo_credit[BRCMF_FWS_FIFO_COUNT];
1aac1e91 434 int credits_borrowed[BRCMF_FWS_FIFO_AC_VO + 1];
84bcc0c3
AS		 435 int deq_node_pos[BRCMF_FWS_FIFO_COUNT];
436 u32 fifo_credit_map;
437 u32 fifo_delay_map;
1aac1e91 438 unsigned long borrow_defer_timestamp;
df50f756 439 bool bus_flow_blocked;
0d24b0ea 440 bool creditmap_received;
3edc1cff
AS		 441};
442
443/*
444 * brcmf_fws_prio2fifo - mapping from 802.1d priority to firmware fifo index.
445 */
446static const int brcmf_fws_prio2fifo[] = {
447 BRCMF_FWS_FIFO_AC_BE,
448 BRCMF_FWS_FIFO_AC_BK,
449 BRCMF_FWS_FIFO_AC_BK,
450 BRCMF_FWS_FIFO_AC_BE,
451 BRCMF_FWS_FIFO_AC_VI,
452 BRCMF_FWS_FIFO_AC_VI,
453 BRCMF_FWS_FIFO_AC_VO,
454 BRCMF_FWS_FIFO_AC_VO
349e7104
AS		 455};
456
c7f34a69
AS		 457static int fcmode;
458module_param(fcmode, int, S_IRUSR);
459MODULE_PARM_DESC(fcmode, "mode of firmware signalled flow control");
460
bb8c8063
AS		 461#define BRCMF_FWS_TLV_DEF(name, id, len) \
462 case BRCMF_FWS_TYPE_ ## name: \
463 return len;
464
3edc1cff
AS		 465/**
466 * brcmf_fws_get_tlv_len() - returns defined length for given tlv id.
467 *
468 * @fws: firmware-signalling information.
469 * @id: identifier of the TLV.
470 *
471 * Return: the specified length for the given TLV; Otherwise -EINVAL.
472 */
bb8c8063
AS		 473static int brcmf_fws_get_tlv_len(struct brcmf_fws_info *fws,
474 enum brcmf_fws_tlv_type id)
475{
476 switch (id) {
477 BRCMF_FWS_TLV_DEFLIST
478 default:
bb8c8063
AS		 479 fws->stats.tlv_invalid_type++;
480 break;
481 }
482 return -EINVAL;
483}
484#undef BRCMF_FWS_TLV_DEF
485
3edc1cff
AS		 486static bool brcmf_fws_ifidx_match(struct sk_buff *skb, void *arg)
487{
488 u32 ifidx = brcmf_skb_if_flags_get_field(skb, INDEX);
489 return ifidx == *(int *)arg;
490}
491
492static void brcmf_fws_psq_flush(struct brcmf_fws_info *fws, struct pktq *q,
493 int ifidx)
494{
495 bool (*matchfn)(struct sk_buff *, void *) = NULL;
496 struct sk_buff *skb;
497 int prec;
498
499 if (ifidx != -1)
500 matchfn = brcmf_fws_ifidx_match;
501 for (prec = 0; prec < q->num_prec; prec++) {
502 skb = brcmu_pktq_pdeq_match(q, prec, matchfn, &ifidx);
503 while (skb) {
84bcc0c3 504 brcmu_pkt_buf_free_skb(skb);
3edc1cff
AS		 505 skb = brcmu_pktq_pdeq_match(q, prec, matchfn, &ifidx);
506 }
507 }
508}
509
6971280a
AS		 510static void brcmf_fws_hanger_init(struct brcmf_fws_hanger *hanger)
511{
512 int i;
513
6971280a
AS		 514 memset(hanger, 0, sizeof(*hanger));
515 for (i = 0; i < ARRAY_SIZE(hanger->items); i++)
3edc1cff 516 hanger->items[i].state = BRCMF_FWS_HANGER_ITEM_STATE_FREE;
6971280a
AS		 517}
518
3edc1cff 519static u32 brcmf_fws_hanger_get_free_slot(struct brcmf_fws_hanger *h)
6971280a
AS		 520{
521 u32 i;
522
6971280a
AS		 523 i = (h->slot_pos + 1) % BRCMF_FWS_HANGER_MAXITEMS;
524
525 while (i != h->slot_pos) {
3edc1cff 526 if (h->items[i].state == BRCMF_FWS_HANGER_ITEM_STATE_FREE) {
6971280a 527 h->slot_pos = i;
84bcc0c3 528 goto done;
6971280a
AS		 529 }
530 i++;
531 if (i == BRCMF_FWS_HANGER_MAXITEMS)
532 i = 0;
533 }
534 brcmf_err("all slots occupied\n");
535 h->failed_slotfind++;
84bcc0c3
AS		 536 i = BRCMF_FWS_HANGER_MAXITEMS;
537done:
84bcc0c3 538 return i;
6971280a
AS		 539}
540
3edc1cff 541static int brcmf_fws_hanger_pushpkt(struct brcmf_fws_hanger *h,
be4910ad 542 struct sk_buff *pkt, u32 slot_id)
6971280a 543{
6971280a
AS		 544 if (slot_id >= BRCMF_FWS_HANGER_MAXITEMS)
545 return -ENOENT;
546
547 if (h->items[slot_id].state != BRCMF_FWS_HANGER_ITEM_STATE_FREE) {
548 brcmf_err("slot is not free\n");
549 h->failed_to_push++;
550 return -EINVAL;
551 }
552
553 h->items[slot_id].state = BRCMF_FWS_HANGER_ITEM_STATE_INUSE;
554 h->items[slot_id].pkt = pkt;
6971280a
AS		 555 h->pushed++;
556 return 0;
557}
558
3edc1cff 559static int brcmf_fws_hanger_poppkt(struct brcmf_fws_hanger *h,
6971280a
AS		 560 u32 slot_id, struct sk_buff **pktout,
561 bool remove_item)
562{
6971280a
AS		 563 if (slot_id >= BRCMF_FWS_HANGER_MAXITEMS)
564 return -ENOENT;
565
566 if (h->items[slot_id].state == BRCMF_FWS_HANGER_ITEM_STATE_FREE) {
567 brcmf_err("entry not in use\n");
568 h->failed_to_pop++;
569 return -EINVAL;
570 }
571
572 *pktout = h->items[slot_id].pkt;
573 if (remove_item) {
574 h->items[slot_id].state = BRCMF_FWS_HANGER_ITEM_STATE_FREE;
575 h->items[slot_id].pkt = NULL;
6971280a
AS		 576 h->popped++;
577 }
578 return 0;
579}
580
84bcc0c3 581static int brcmf_fws_hanger_mark_suppressed(struct brcmf_fws_hanger *h,
be4910ad 582 u32 slot_id)
6971280a 583{
6971280a
AS		 584 if (slot_id >= BRCMF_FWS_HANGER_MAXITEMS)
585 return -ENOENT;
586
5631becb 587 if (h->items[slot_id].state == BRCMF_FWS_HANGER_ITEM_STATE_FREE) {
6971280a
AS		 588 brcmf_err("entry not in use\n");
589 return -EINVAL;
590 }
591
3edc1cff 592 h->items[slot_id].state = BRCMF_FWS_HANGER_ITEM_STATE_INUSE_SUPPRESSED;
6971280a
AS		 593 return 0;
594}
595
84bcc0c3 596static void brcmf_fws_hanger_cleanup(struct brcmf_fws_info *fws,
6971280a
AS		 597 bool (*fn)(struct sk_buff *, void *),
598 int ifidx)
599{
84bcc0c3 600 struct brcmf_fws_hanger *h = &fws->hanger;
6971280a
AS		 601 struct sk_buff *skb;
602 int i;
603 enum brcmf_fws_hanger_item_state s;
604
6971280a
AS		 605 for (i = 0; i < ARRAY_SIZE(h->items); i++) {
606 s = h->items[i].state;
607 if (s == BRCMF_FWS_HANGER_ITEM_STATE_INUSE ||
608 s == BRCMF_FWS_HANGER_ITEM_STATE_INUSE_SUPPRESSED) {
609 skb = h->items[i].pkt;
610 if (fn == NULL || fn(skb, &ifidx)) {
611 /* suppress packets freed from psq */
612 if (s == BRCMF_FWS_HANGER_ITEM_STATE_INUSE)
613 brcmu_pkt_buf_free_skb(skb);
614 h->items[i].state =
615 BRCMF_FWS_HANGER_ITEM_STATE_FREE;
616 }
617 }
618 }
619}
620
8071fd61
AS		 621static void brcmf_fws_macdesc_set_name(struct brcmf_fws_info *fws,
622 struct brcmf_fws_mac_descriptor *desc)
623{
624 if (desc == &fws->desc.other)
625 strlcpy(desc->name, "MAC-OTHER", sizeof(desc->name));
626 else if (desc->mac_handle)
627 scnprintf(desc->name, sizeof(desc->name), "MAC-%d:%d",
628 desc->mac_handle, desc->interface_id);
629 else
630 scnprintf(desc->name, sizeof(desc->name), "MACIF:%d",
631 desc->interface_id);
632}
633
1ab083a3
AS		 634static void brcmf_fws_macdesc_init(struct brcmf_fws_mac_descriptor *desc,
635 u8 *addr, u8 ifidx)
ce814c1b 636{
84bcc0c3
AS		 637 brcmf_dbg(TRACE,
638 "enter: desc %p ea=%pM, ifidx=%u\n", desc, addr, ifidx);
ce814c1b
AS		 639 desc->occupied = 1;
640 desc->state = BRCMF_FWS_STATE_OPEN;
641 desc->requested_credit = 0;
fa587d4b 642 desc->requested_packet = 0;
ce814c1b
AS		 643 /* depending on use may need ifp->bssidx instead */
644 desc->interface_id = ifidx;
645 desc->ac_bitmap = 0xff; /* update this when handling APSD */
84bcc0c3
AS		 646 if (addr)
647 memcpy(&desc->ea[0], addr, ETH_ALEN);
ce814c1b
AS		 648}
649
650static
1ab083a3 651void brcmf_fws_macdesc_deinit(struct brcmf_fws_mac_descriptor *desc)
ce814c1b
AS		 652{
653 brcmf_dbg(TRACE,
654 "enter: ea=%pM, ifidx=%u\n", desc->ea, desc->interface_id);
655 desc->occupied = 0;
656 desc->state = BRCMF_FWS_STATE_CLOSE;
657 desc->requested_credit = 0;
fa587d4b 658 desc->requested_packet = 0;
ce814c1b
AS		 659}
660
661static struct brcmf_fws_mac_descriptor *
1ab083a3 662brcmf_fws_macdesc_lookup(struct brcmf_fws_info *fws, u8 *ea)
ce814c1b
AS		 663{
664 struct brcmf_fws_mac_descriptor *entry;
665 int i;
666
ce814c1b
AS		 667 if (ea == NULL)
668 return ERR_PTR(-EINVAL);
669
84bcc0c3
AS		 670 entry = &fws->desc.nodes[0];
671 for (i = 0; i < ARRAY_SIZE(fws->desc.nodes); i++) {
ce814c1b
AS		 672 if (entry->occupied && !memcmp(entry->ea, ea, ETH_ALEN))
673 return entry;
674 entry++;
675 }
676
677 return ERR_PTR(-ENOENT);
678}
679
3edc1cff 680static struct brcmf_fws_mac_descriptor*
1ab083a3 681brcmf_fws_macdesc_find(struct brcmf_fws_info *fws, struct brcmf_if *ifp, u8 *da)
3edc1cff 682{
84bcc0c3 683 struct brcmf_fws_mac_descriptor *entry = &fws->desc.other;
3edc1cff 684 bool multicast;
3edc1cff 685
f97a7f06 686 multicast = is_multicast_ether_addr(da);
a7965fbb 687
5cd51c2b
HM		 688 /* Multicast destination, STA and P2P clients get the interface entry.
689 * STA/GC gets the Mac Entry for TDLS destinations, TDLS destinations
690 * have their own entry.
3edc1cff 691 */
5cd51c2b 692 if (multicast && ifp->fws_desc) {
3edc1cff 693 entry = ifp->fws_desc;
3edc1cff 694 goto done;
5cd51c2b 695 }
3edc1cff 696
1ab083a3 697 entry = brcmf_fws_macdesc_lookup(fws, da);
3edc1cff 698 if (IS_ERR(entry))
5cd51c2b 699 entry = ifp->fws_desc;
3edc1cff
AS		 700
701done:
3edc1cff
AS		 702 return entry;
703}
704
1ab083a3
AS		 705static bool brcmf_fws_macdesc_closed(struct brcmf_fws_info *fws,
706 struct brcmf_fws_mac_descriptor *entry,
707 int fifo)
84bcc0c3 708{
b75c1a30 709 struct brcmf_fws_mac_descriptor *if_entry;
9fc60224 710 bool closed;
84bcc0c3 711
b75c1a30
AS		 712 /* for unique destination entries the related interface
713 * may be closed.
714 */
715 if (entry->mac_handle) {
716 if_entry = &fws->desc.iface[entry->interface_id];
717 if (if_entry->state == BRCMF_FWS_STATE_CLOSE)
718 return true;
719 }
9fc60224
AS		 720 /* an entry is closed when the state is closed and
721 * the firmware did not request anything.
84bcc0c3 722 */
9fc60224
AS		 723 closed = entry->state == BRCMF_FWS_STATE_CLOSE &&
724 !entry->requested_credit && !entry->requested_packet;
84bcc0c3 725
9fc60224
AS		 726 /* Or firmware does not allow traffic for given fifo */
727 return closed || !(entry->ac_bitmap & BIT(fifo));
84bcc0c3
AS		 728}
729
1ab083a3
AS		 730static void brcmf_fws_macdesc_cleanup(struct brcmf_fws_info *fws,
731 struct brcmf_fws_mac_descriptor *entry,
732 int ifidx)
fba1400a 733{
3edc1cff 734 if (entry->occupied && (ifidx == -1 || ifidx == entry->interface_id)) {
3edc1cff 735 brcmf_fws_psq_flush(fws, &entry->psq, ifidx);
fba1400a
AS		 736 entry->occupied = !!(entry->psq.len);
737 }
738}
739
e2432b67
AS		 740static void brcmf_fws_bus_txq_cleanup(struct brcmf_fws_info *fws,
741 bool (*fn)(struct sk_buff *, void *),
742 int ifidx)
743{
744 struct brcmf_fws_hanger_item *hi;
745 struct pktq *txq;
746 struct sk_buff *skb;
747 int prec;
748 u32 hslot;
749
e2432b67
AS		 750 txq = brcmf_bus_gettxq(fws->drvr->bus_if);
751 if (IS_ERR(txq)) {
752 brcmf_dbg(TRACE, "no txq to clean up\n");
753 return;
754 }
755
756 for (prec = 0; prec < txq->num_prec; prec++) {
757 skb = brcmu_pktq_pdeq_match(txq, prec, fn, &ifidx);
758 while (skb) {
759 hslot = brcmf_skb_htod_tag_get_field(skb, HSLOT);
760 hi = &fws->hanger.items[hslot];
761 WARN_ON(skb != hi->pkt);
762 hi->state = BRCMF_FWS_HANGER_ITEM_STATE_FREE;
763 brcmu_pkt_buf_free_skb(skb);
764 skb = brcmu_pktq_pdeq_match(txq, prec, fn, &ifidx);
765 }
766 }
767}
768
fba1400a
AS		 769static void brcmf_fws_cleanup(struct brcmf_fws_info *fws, int ifidx)
770{
771 int i;
772 struct brcmf_fws_mac_descriptor *table;
a3e993c7 773 bool (*matchfn)(struct sk_buff *, void *) = NULL;
fba1400a 774
fba1400a
AS		 775 if (fws == NULL)
776 return;
777
a3e993c7
AS		 778 if (ifidx != -1)
779 matchfn = brcmf_fws_ifidx_match;
780
fba1400a 781 /* cleanup individual nodes */
84bcc0c3
AS		 782 table = &fws->desc.nodes[0];
783 for (i = 0; i < ARRAY_SIZE(fws->desc.nodes); i++)
1ab083a3 784 brcmf_fws_macdesc_cleanup(fws, &table[i], ifidx);
fba1400a 785
1ab083a3 786 brcmf_fws_macdesc_cleanup(fws, &fws->desc.other, ifidx);
e2432b67 787 brcmf_fws_bus_txq_cleanup(fws, matchfn, ifidx);
84bcc0c3
AS		 788 brcmf_fws_hanger_cleanup(fws, matchfn, ifidx);
789}
790
c7773fc1 791static int brcmf_fws_hdrpush(struct brcmf_fws_info *fws, struct sk_buff *skb)
84bcc0c3 792{
c7773fc1
AS		 793 struct brcmf_fws_mac_descriptor *entry = brcmf_skbcb(skb)->mac;
794 u8 *wlh;
795 u16 data_offset = 0;
796 u8 fillers;
797 __le32 pkttag = cpu_to_le32(brcmf_skbcb(skb)->htod);
798
799 brcmf_dbg(TRACE, "enter: ea=%pM, ifidx=%u (%u), pkttag=0x%08X, hslot=%d\n",
800 entry->ea, entry->interface_id,
801 brcmf_skb_if_flags_get_field(skb, INDEX),
802 le32_to_cpu(pkttag), (le32_to_cpu(pkttag) >> 8) & 0xffff);
803 if (entry->send_tim_signal)
804 data_offset += 2 + BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP_LEN;
805
806 /* +2 is for Type[1] and Len[1] in TLV, plus TIM signal */
807 data_offset += 2 + BRCMF_FWS_TYPE_PKTTAG_LEN;
808 fillers = round_up(data_offset, 4) - data_offset;
809 data_offset += fillers;
810
811 skb_push(skb, data_offset);
812 wlh = skb->data;
813
814 wlh[0] = BRCMF_FWS_TYPE_PKTTAG;
815 wlh[1] = BRCMF_FWS_TYPE_PKTTAG_LEN;
816 memcpy(&wlh[2], &pkttag, sizeof(pkttag));
817 wlh += BRCMF_FWS_TYPE_PKTTAG_LEN + 2;
818
819 if (entry->send_tim_signal) {
820 entry->send_tim_signal = 0;
821 wlh[0] = BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP;
822 wlh[1] = BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP_LEN;
823 wlh[2] = entry->mac_handle;
824 wlh[3] = entry->traffic_pending_bmp;
825 brcmf_dbg(TRACE, "adding TIM info: %02X:%02X:%02X:%02X\n",
826 wlh[0], wlh[1], wlh[2], wlh[3]);
827 wlh += BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP_LEN + 2;
828 entry->traffic_lastreported_bmp = entry->traffic_pending_bmp;
84bcc0c3 829 }
c7773fc1
AS		 830 if (fillers)
831 memset(wlh, BRCMF_FWS_TYPE_FILLER, fillers);
832
833 brcmf_proto_hdrpush(fws->drvr, brcmf_skb_if_flags_get_field(skb, INDEX),
834 data_offset >> 2, skb);
835 return 0;
836}
837
838static bool brcmf_fws_tim_update(struct brcmf_fws_info *fws,
839 struct brcmf_fws_mac_descriptor *entry,
4e89dfca 840 int fifo, bool send_immediately)
c7773fc1
AS		 841{
842 struct sk_buff *skb;
843 struct brcmf_bus *bus;
844 struct brcmf_skbuff_cb *skcb;
845 s32 err;
846 u32 len;
847
848 /* check delayedQ and suppressQ in one call using bitmap */
4e89dfca
AS		 849 if (brcmu_pktq_mlen(&entry->psq, 3 << (fifo * 2)) == 0)
850 entry->traffic_pending_bmp &= ~NBITVAL(fifo);
c7773fc1 851 else
4e89dfca 852 entry->traffic_pending_bmp |= NBITVAL(fifo);
c7773fc1
AS		 853
854 entry->send_tim_signal = false;
84bcc0c3
AS		 855 if (entry->traffic_lastreported_bmp != entry->traffic_pending_bmp)
856 entry->send_tim_signal = true;
c7773fc1
AS		 857 if (send_immediately && entry->send_tim_signal &&
858 entry->state == BRCMF_FWS_STATE_CLOSE) {
859 /* create a dummy packet and sent that. The traffic */
860 /* bitmap info will automatically be attached to that packet */
861 len = BRCMF_FWS_TYPE_PKTTAG_LEN + 2 +
862 BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP_LEN + 2 +
863 4 + fws->drvr->hdrlen;
864 skb = brcmu_pkt_buf_get_skb(len);
865 if (skb == NULL)
866 return false;
867 skb_pull(skb, len);
868 skcb = brcmf_skbcb(skb);
869 skcb->mac = entry;
870 skcb->state = BRCMF_FWS_SKBSTATE_TIM;
871 bus = fws->drvr->bus_if;
872 err = brcmf_fws_hdrpush(fws, skb);
873 if (err == 0)
874 err = brcmf_bus_txdata(bus, skb);
875 if (err)
876 brcmu_pkt_buf_free_skb(skb);
877 return true;
878 }
879 return false;
84bcc0c3
AS		 880}
881
882static void
883brcmf_fws_flow_control_check(struct brcmf_fws_info *fws, struct pktq *pq,
884 u8 if_id)
885{
402e3ba2 886 struct brcmf_if *ifp = fws->drvr->iflist[!if_id ? 0 : if_id + 1];
84bcc0c3 887
84bcc0c3
AS		 888 if (WARN_ON(!ifp))
889 return;
890
891 if ((ifp->netif_stop & BRCMF_NETIF_STOP_REASON_FWS_FC) &&
892 pq->len <= BRCMF_FWS_FLOWCONTROL_LOWATER)
893 brcmf_txflowblock_if(ifp,
894 BRCMF_NETIF_STOP_REASON_FWS_FC, false);
895 if (!(ifp->netif_stop & BRCMF_NETIF_STOP_REASON_FWS_FC) &&
5631becb
AS		 896 pq->len >= BRCMF_FWS_FLOWCONTROL_HIWATER) {
897 fws->stats.fws_flow_block++;
84bcc0c3 898 brcmf_txflowblock_if(ifp, BRCMF_NETIF_STOP_REASON_FWS_FC, true);
5631becb 899 }
84bcc0c3 900 return;
fba1400a
AS		 901}
902
349e7104
AS		 903static int brcmf_fws_rssi_indicate(struct brcmf_fws_info *fws, s8 rssi)
904{
905 brcmf_dbg(CTL, "rssi %d\n", rssi);
906 return 0;
907}
908
ce814c1b
AS		 909static
910int brcmf_fws_macdesc_indicate(struct brcmf_fws_info *fws, u8 type, u8 *data)
911{
912 struct brcmf_fws_mac_descriptor *entry, *existing;
913 u8 mac_handle;
914 u8 ifidx;
915 u8 *addr;
916
917 mac_handle = *data++;
918 ifidx = *data++;
919 addr = data;
920
84bcc0c3 921 entry = &fws->desc.nodes[mac_handle & 0x1F];
ce814c1b 922 if (type == BRCMF_FWS_TYPE_MACDESC_DEL) {
9a83f1ec 923 if (entry->occupied) {
8071fd61
AS		 924 brcmf_dbg(TRACE, "deleting %s mac %pM\n",
925 entry->name, addr);
1ab083a3
AS		 926 brcmf_fws_macdesc_cleanup(fws, entry, -1);
927 brcmf_fws_macdesc_deinit(entry);
9a83f1ec 928 } else
ce814c1b 929 fws->stats.mac_update_failed++;
ce814c1b
AS		 930 return 0;
931 }
932
1ab083a3 933 existing = brcmf_fws_macdesc_lookup(fws, addr);
ce814c1b
AS		 934 if (IS_ERR(existing)) {
935 if (!entry->occupied) {
936 entry->mac_handle = mac_handle;
1ab083a3 937 brcmf_fws_macdesc_init(entry, addr, ifidx);
8071fd61 938 brcmf_fws_macdesc_set_name(fws, entry);
ce814c1b
AS		 939 brcmu_pktq_init(&entry->psq, BRCMF_FWS_PSQ_PREC_COUNT,
940 BRCMF_FWS_PSQ_LEN);
8071fd61 941 brcmf_dbg(TRACE, "add %s mac %pM\n", entry->name, addr);
ce814c1b
AS		 942 } else {
943 fws->stats.mac_update_failed++;
944 }
945 } else {
946 if (entry != existing) {
8071fd61 947 brcmf_dbg(TRACE, "copy mac %s\n", existing->name);
ce814c1b
AS		 948 memcpy(entry, existing,
949 offsetof(struct brcmf_fws_mac_descriptor, psq));
950 entry->mac_handle = mac_handle;
1ab083a3 951 brcmf_fws_macdesc_deinit(existing);
8071fd61
AS		 952 brcmf_fws_macdesc_set_name(fws, entry);
953 brcmf_dbg(TRACE, "relocate %s mac %pM\n", entry->name,
954 addr);
ce814c1b
AS		 955 } else {
956 brcmf_dbg(TRACE, "use existing\n");
957 WARN_ON(entry->mac_handle != mac_handle);
958 /* TODO: what should we do here: continue, reinit, .. */
959 }
960 }
961 return 0;
962}
963
33753d47
AS		 964static int brcmf_fws_macdesc_state_indicate(struct brcmf_fws_info *fws,
965 u8 type, u8 *data)
966{
967 struct brcmf_fws_mac_descriptor *entry;
968 u8 mac_handle;
33753d47
AS		 969
970 mac_handle = data[0];
971 entry = &fws->desc.nodes[mac_handle & 0x1F];
972 if (!entry->occupied) {
973 fws->stats.mac_ps_update_failed++;
974 return -ESRCH;
975 }
c7773fc1 976 /* a state update should wipe old credits */
33753d47 977 entry->requested_credit = 0;
c7773fc1 978 entry->requested_packet = 0;
33753d47
AS		 979 if (type == BRCMF_FWS_TYPE_MAC_OPEN) {
980 entry->state = BRCMF_FWS_STATE_OPEN;
a5e9d805 981 return BRCMF_FWS_RET_OK_SCHEDULE;
33753d47
AS		 982 } else {
983 entry->state = BRCMF_FWS_STATE_CLOSE;
c7773fc1
AS		 984 brcmf_fws_tim_update(fws, entry, BRCMF_FWS_FIFO_AC_BK, false);
985 brcmf_fws_tim_update(fws, entry, BRCMF_FWS_FIFO_AC_BE, false);
986 brcmf_fws_tim_update(fws, entry, BRCMF_FWS_FIFO_AC_VI, false);
987 brcmf_fws_tim_update(fws, entry, BRCMF_FWS_FIFO_AC_VO, true);
33753d47 988 }
a5e9d805 989 return BRCMF_FWS_RET_OK_NOSCHEDULE;
33753d47
AS		 990}
991
992static int brcmf_fws_interface_state_indicate(struct brcmf_fws_info *fws,
993 u8 type, u8 *data)
994{
995 struct brcmf_fws_mac_descriptor *entry;
996 u8 ifidx;
997 int ret;
998
999 ifidx = data[0];
1000
33753d47
AS		 1001 if (ifidx >= BRCMF_MAX_IFS) {
1002 ret = -ERANGE;
1003 goto fail;
1004 }
1005
1006 entry = &fws->desc.iface[ifidx];
1007 if (!entry->occupied) {
1008 ret = -ESRCH;
1009 goto fail;
1010 }
1011
8071fd61
AS		 1012 brcmf_dbg(TRACE, "%s (%d): %s\n", brcmf_fws_get_tlv_name(type), type,
1013 entry->name);
33753d47
AS		 1014 switch (type) {
1015 case BRCMF_FWS_TYPE_INTERFACE_OPEN:
1016 entry->state = BRCMF_FWS_STATE_OPEN;
a5e9d805 1017 return BRCMF_FWS_RET_OK_SCHEDULE;
33753d47
AS		 1018 case BRCMF_FWS_TYPE_INTERFACE_CLOSE:
1019 entry->state = BRCMF_FWS_STATE_CLOSE;
a5e9d805 1020 return BRCMF_FWS_RET_OK_NOSCHEDULE;
33753d47
AS		 1021 default:
1022 ret = -EINVAL;
1023 break;
1024 }
1025fail:
1026 fws->stats.if_update_failed++;
1027 return ret;
1028}
1029
5f38b683
AS		 1030static int brcmf_fws_request_indicate(struct brcmf_fws_info *fws, u8 type,
1031 u8 *data)
1032{
1033 struct brcmf_fws_mac_descriptor *entry;
1034
1035 entry = &fws->desc.nodes[data[1] & 0x1F];
1036 if (!entry->occupied) {
1037 if (type == BRCMF_FWS_TYPE_MAC_REQUEST_CREDIT)
1038 fws->stats.credit_request_failed++;
1039 else
1040 fws->stats.packet_request_failed++;
1041 return -ESRCH;
1042 }
1043
8071fd61
AS		 1044 brcmf_dbg(TRACE, "%s (%d): %s cnt %d bmp %d\n",
1045 brcmf_fws_get_tlv_name(type), type, entry->name,
1046 data[0], data[2]);
5f38b683
AS		 1047 if (type == BRCMF_FWS_TYPE_MAC_REQUEST_CREDIT)
1048 entry->requested_credit = data[0];
1049 else
1050 entry->requested_packet = data[0];
1051
1052 entry->ac_bitmap = data[2];
a5e9d805 1053 return BRCMF_FWS_RET_OK_SCHEDULE;
5f38b683
AS		 1054}
1055
fa587d4b
HM		 1056static void
1057brcmf_fws_macdesc_use_req_credit(struct brcmf_fws_mac_descriptor *entry,
1058 struct sk_buff *skb)
289ec1c7 1059{
fa587d4b
HM		 1060 if (entry->requested_credit > 0) {
1061 entry->requested_credit--;
1062 brcmf_skb_if_flags_set_field(skb, REQUESTED, 1);
1063 brcmf_skb_if_flags_set_field(skb, REQ_CREDIT, 1);
1064 if (entry->state != BRCMF_FWS_STATE_CLOSE)
1065 brcmf_err("requested credit set while mac not closed!\n");
1066 } else if (entry->requested_packet > 0) {
1067 entry->requested_packet--;
1068 brcmf_skb_if_flags_set_field(skb, REQUESTED, 1);
1069 brcmf_skb_if_flags_set_field(skb, REQ_CREDIT, 0);
1070 if (entry->state != BRCMF_FWS_STATE_CLOSE)
1071 brcmf_err("requested packet set while mac not closed!\n");
289ec1c7 1072 } else {
fa587d4b
HM		 1073 brcmf_skb_if_flags_set_field(skb, REQUESTED, 0);
1074 brcmf_skb_if_flags_set_field(skb, REQ_CREDIT, 0);
289ec1c7 1075 }
fa587d4b
HM		 1076}
1077
1078static void brcmf_fws_macdesc_return_req_credit(struct sk_buff *skb)
1079{
1080 struct brcmf_fws_mac_descriptor *entry = brcmf_skbcb(skb)->mac;
1081
1082 if ((brcmf_skb_if_flags_get_field(skb, REQ_CREDIT)) &&
1083 (entry->state == BRCMF_FWS_STATE_CLOSE))
1084 entry->requested_credit++;
289ec1c7
AS		 1085}
1086
84bcc0c3
AS		 1087static void brcmf_fws_return_credits(struct brcmf_fws_info *fws,
1088 u8 fifo, u8 credits)
1089{
1aac1e91
AS		 1090 int lender_ac;
1091 int *borrowed;
1092 int *fifo_credit;
1093
84bcc0c3
AS		 1094 if (!credits)
1095 return;
1096
afc3bbfc
HM		 1097 fws->fifo_credit_map |= 1 << fifo;
1098
1aac1e91
AS		 1099 if ((fifo == BRCMF_FWS_FIFO_AC_BE) &&
1100 (fws->credits_borrowed[0])) {
1101 for (lender_ac = BRCMF_FWS_FIFO_AC_VO; lender_ac >= 0;
1102 lender_ac--) {
1103 borrowed = &fws->credits_borrowed[lender_ac];
1104 if (*borrowed) {
1105 fws->fifo_credit_map |= (1 << lender_ac);
1106 fifo_credit = &fws->fifo_credit[lender_ac];
1107 if (*borrowed >= credits) {
1108 *borrowed -= credits;
1109 *fifo_credit += credits;
1110 return;
1111 } else {
1112 credits -= *borrowed;
1113 *fifo_credit += *borrowed;
1114 *borrowed = 0;
1115 }
1116 }
1117 }
1118 }
1119
84bcc0c3
AS		 1120 fws->fifo_credit[fifo] += credits;
1121}
1122
1123static void brcmf_fws_schedule_deq(struct brcmf_fws_info *fws)
1124{
1125 /* only schedule dequeue when there are credits for delayed traffic */
1126 if (fws->fifo_credit_map & fws->fifo_delay_map)
1127 queue_work(fws->fws_wq, &fws->fws_dequeue_work);
1128}
1129
84bcc0c3
AS		 1130static int brcmf_fws_enq(struct brcmf_fws_info *fws,
1131 enum brcmf_fws_skb_state state, int fifo,
1132 struct sk_buff *p)
1133{
1134 int prec = 2 * fifo;
1135 u32 *qfull_stat = &fws->stats.delayq_full_error;
1136
1137 struct brcmf_fws_mac_descriptor *entry;
1138
1139 entry = brcmf_skbcb(p)->mac;
1140 if (entry == NULL) {
1141 brcmf_err("no mac descriptor found for skb %p\n", p);
1142 return -ENOENT;
1143 }
1144
8071fd61 1145 brcmf_dbg(DATA, "enter: fifo %d skb %p\n", fifo, p);
84bcc0c3
AS		 1146 if (state == BRCMF_FWS_SKBSTATE_SUPPRESSED) {
1147 prec += 1;
1148 qfull_stat = &fws->stats.supprq_full_error;
1149 }
1150
1151 if (brcmu_pktq_penq(&entry->psq, prec, p) == NULL) {
1152 *qfull_stat += 1;
1153 return -ENFILE;
1154 }
1155
1156 /* increment total enqueued packet count */
1157 fws->fifo_delay_map |= 1 << fifo;
1158 fws->fifo_enqpkt[fifo]++;
1159
1160 /* update the sk_buff state */
1161 brcmf_skbcb(p)->state = state;
84bcc0c3
AS		 1162
1163 /*
1164 * A packet has been pushed so update traffic
1165 * availability bitmap, if applicable
1166 */
c7773fc1 1167 brcmf_fws_tim_update(fws, entry, fifo, true);
84bcc0c3
AS		 1168 brcmf_fws_flow_control_check(fws, &entry->psq,
1169 brcmf_skb_if_flags_get_field(p, INDEX));
1170 return 0;
1171}
1172
1173static struct sk_buff *brcmf_fws_deq(struct brcmf_fws_info *fws, int fifo)
1174{
1175 struct brcmf_fws_mac_descriptor *table;
1176 struct brcmf_fws_mac_descriptor *entry;
1177 struct sk_buff *p;
84bcc0c3
AS		 1178 int num_nodes;
1179 int node_pos;
1180 int prec_out;
07529d20 1181 int pmsk;
84bcc0c3
AS		 1182 int i;
1183
1184 table = (struct brcmf_fws_mac_descriptor *)&fws->desc;
1185 num_nodes = sizeof(fws->desc) / sizeof(struct brcmf_fws_mac_descriptor);
1186 node_pos = fws->deq_node_pos[fifo];
1187
1188 for (i = 0; i < num_nodes; i++) {
1189 entry = &table[(node_pos + i) % num_nodes];
b75c1a30 1190 if (!entry->occupied ||
1ab083a3 1191 brcmf_fws_macdesc_closed(fws, entry, fifo))
84bcc0c3
AS		 1192 continue;
1193
1194 if (entry->suppressed)
1195 pmsk = 2;
07529d20
AS		 1196 else
1197 pmsk = 3;
84bcc0c3
AS		 1198 p = brcmu_pktq_mdeq(&entry->psq, pmsk << (fifo * 2), &prec_out);
1199 if (p == NULL) {
1200 if (entry->suppressed) {
8c5140f6
HM		 1201 if (entry->suppr_transit_count)
1202 continue;
84bcc0c3
AS		 1203 entry->suppressed = false;
1204 p = brcmu_pktq_mdeq(&entry->psq,
1205 1 << (fifo * 2), &prec_out);
1206 }
1207 }
1208 if (p == NULL)
1209 continue;
1210
fa587d4b 1211 brcmf_fws_macdesc_use_req_credit(entry, p);
84bcc0c3
AS		 1212
1213 /* move dequeue position to ensure fair round-robin */
1214 fws->deq_node_pos[fifo] = (node_pos + i + 1) % num_nodes;
1215 brcmf_fws_flow_control_check(fws, &entry->psq,
1216 brcmf_skb_if_flags_get_field(p,
1217 INDEX)
1218 );
1219 /*
1220 * A packet has been picked up, update traffic
1221 * availability bitmap, if applicable
1222 */
c7773fc1 1223 brcmf_fws_tim_update(fws, entry, fifo, false);
84bcc0c3
AS		 1224
1225 /*
1226 * decrement total enqueued fifo packets and
1227 * clear delay bitmap if done.
1228 */
1229 fws->fifo_enqpkt[fifo]--;
1230 if (fws->fifo_enqpkt[fifo] == 0)
1231 fws->fifo_delay_map &= ~(1 << fifo);
1232 goto done;
1233 }
1234 p = NULL;
1235done:
8071fd61 1236 brcmf_dbg(DATA, "exit: fifo %d skb %p\n", fifo, p);
84bcc0c3
AS		 1237 return p;
1238}
1239
1240static int brcmf_fws_txstatus_suppressed(struct brcmf_fws_info *fws, int fifo,
1241 struct sk_buff *skb, u32 genbit)
1242{
1243 struct brcmf_fws_mac_descriptor *entry = brcmf_skbcb(skb)->mac;
1244 u32 hslot;
1245 int ret;
2747e5f7 1246 u8 ifidx;
84bcc0c3
AS		 1247
1248 hslot = brcmf_skb_htod_tag_get_field(skb, HSLOT);
1249
1250 /* this packet was suppressed */
be4910ad 1251 if (!entry->suppressed) {
84bcc0c3 1252 entry->suppressed = true;
84bcc0c3 1253 entry->suppr_transit_count = entry->transit_count;
8c5140f6
HM		 1254 brcmf_dbg(DATA, "suppress %s: transit %d\n",
1255 entry->name, entry->transit_count);
84bcc0c3
AS		 1256 }
1257
1258 entry->generation = genbit;
1259
2747e5f7
HM		 1260 ret = brcmf_proto_hdrpull(fws->drvr, false, &ifidx, skb);
1261 if (ret == 0)
1262 ret = brcmf_fws_enq(fws, BRCMF_FWS_SKBSTATE_SUPPRESSED, fifo,
1263 skb);
84bcc0c3 1264 if (ret != 0) {
2747e5f7 1265 /* suppress q is full or hdrpull failed, drop this packet */
84bcc0c3
AS		 1266 brcmf_fws_hanger_poppkt(&fws->hanger, hslot, &skb,
1267 true);
1268 } else {
1269 /*
1270 * Mark suppressed to avoid a double free during
1271 * wlfc cleanup
1272 */
be4910ad 1273 brcmf_fws_hanger_mark_suppressed(&fws->hanger, hslot);
84bcc0c3
AS		 1274 }
1275
1276 return ret;
1277}
1278
3edc1cff 1279static int
8071fd61 1280brcmf_fws_txs_process(struct brcmf_fws_info *fws, u8 flags, u32 hslot,
84bcc0c3 1281 u32 genbit)
3edc1cff 1282{
84bcc0c3 1283 u32 fifo;
3edc1cff 1284 int ret;
84bcc0c3 1285 bool remove_from_hanger = true;
3edc1cff 1286 struct sk_buff *skb;
8071fd61 1287 struct brcmf_skbuff_cb *skcb;
3edc1cff
AS		 1288 struct brcmf_fws_mac_descriptor *entry = NULL;
1289
8071fd61 1290 brcmf_dbg(DATA, "flags %d\n", flags);
3edc1cff
AS		 1291
1292 if (flags == BRCMF_FWS_TXSTATUS_DISCARD)
1293 fws->stats.txs_discard++;
84bcc0c3
AS		 1294 else if (flags == BRCMF_FWS_TXSTATUS_CORE_SUPPRESS) {
1295 fws->stats.txs_supp_core++;
1296 remove_from_hanger = false;
1297 } else if (flags == BRCMF_FWS_TXSTATUS_FW_PS_SUPPRESS) {
1298 fws->stats.txs_supp_ps++;
1299 remove_from_hanger = false;
5631becb 1300 } else if (flags == BRCMF_FWS_TXSTATUS_FW_TOSSED)
3edc1cff 1301 fws->stats.txs_tossed++;
5631becb
AS		 1302 else if (flags == BRCMF_FWS_TXSTATUS_HOST_TOSSED)
1303 fws->stats.txs_host_tossed++;
3edc1cff
AS		 1304 else
1305 brcmf_err("unexpected txstatus\n");
1306
1307 ret = brcmf_fws_hanger_poppkt(&fws->hanger, hslot, &skb,
84bcc0c3 1308 remove_from_hanger);
3edc1cff
AS		 1309 if (ret != 0) {
1310 brcmf_err("no packet in hanger slot: hslot=%d\n", hslot);
1311 return ret;
1312 }
1313
8071fd61
AS		 1314 skcb = brcmf_skbcb(skb);
1315 entry = skcb->mac;
3edc1cff 1316 if (WARN_ON(!entry)) {
84bcc0c3
AS		 1317 brcmu_pkt_buf_free_skb(skb);
1318 return -EINVAL;
3edc1cff 1319 }
8c5140f6
HM		 1320 entry->transit_count--;
1321 if (entry->suppressed && entry->suppr_transit_count)
1322 entry->suppr_transit_count--;
3edc1cff 1323
8071fd61
AS		 1324 brcmf_dbg(DATA, "%s flags %X htod %X\n", entry->name, skcb->if_flags,
1325 skcb->htod);
1326
84bcc0c3
AS		 1327 /* pick up the implicit credit from this packet */
1328 fifo = brcmf_skb_htod_tag_get_field(skb, FIFO);
fa587d4b
HM		 1329 if ((fws->fcmode == BRCMF_FWS_FCMODE_IMPLIED_CREDIT) ||
1330 (brcmf_skb_if_flags_get_field(skb, REQ_CREDIT)) ||
1331 (flags == BRCMF_FWS_TXSTATUS_HOST_TOSSED)) {
1332 brcmf_fws_return_credits(fws, fifo, 1);
1333 brcmf_fws_schedule_deq(fws);
1334 }
1335 brcmf_fws_macdesc_return_req_credit(skb);
3edc1cff 1336
84bcc0c3
AS		 1337 if (!remove_from_hanger)
1338 ret = brcmf_fws_txstatus_suppressed(fws, fifo, skb, genbit);
1339
8c5140f6 1340 if (remove_from_hanger || ret)
84bcc0c3 1341 brcmf_txfinalize(fws->drvr, skb, true);
8c5140f6 1342
84bcc0c3
AS		 1343 return 0;
1344}
1345
1346static int brcmf_fws_fifocreditback_indicate(struct brcmf_fws_info *fws,
1347 u8 *data)
1348{
1349 int i;
1350
1351 if (fws->fcmode != BRCMF_FWS_FCMODE_EXPLICIT_CREDIT) {
1352 brcmf_dbg(INFO, "ignored\n");
a5e9d805 1353 return BRCMF_FWS_RET_OK_NOSCHEDULE;
84bcc0c3
AS		 1354 }
1355
8071fd61 1356 brcmf_dbg(DATA, "enter: data %pM\n", data);
84bcc0c3
AS		 1357 for (i = 0; i < BRCMF_FWS_FIFO_COUNT; i++)
1358 brcmf_fws_return_credits(fws, i, data[i]);
1359
8071fd61 1360 brcmf_dbg(DATA, "map: credit %x delay %x\n", fws->fifo_credit_map,
84bcc0c3 1361 fws->fifo_delay_map);
a5e9d805 1362 return BRCMF_FWS_RET_OK_SCHEDULE;
3edc1cff
AS		 1363}
1364
0f8b5cc5
AS		 1365static int brcmf_fws_txstatus_indicate(struct brcmf_fws_info *fws, u8 *data)
1366{
a2ffc566 1367 __le32 status_le;
0f8b5cc5
AS		 1368 u32 status;
1369 u32 hslot;
84bcc0c3 1370 u32 genbit;
0f8b5cc5
AS		 1371 u8 flags;
1372
1373 fws->stats.txs_indicate++;
a2ffc566
AS		 1374 memcpy(&status_le, data, sizeof(status_le));
1375 status = le32_to_cpu(status_le);
0f8b5cc5
AS		 1376 flags = brcmf_txstatus_get_field(status, FLAGS);
1377 hslot = brcmf_txstatus_get_field(status, HSLOT);
84bcc0c3 1378 genbit = brcmf_txstatus_get_field(status, GENERATION);
0f8b5cc5 1379
8071fd61 1380 return brcmf_fws_txs_process(fws, flags, hslot, genbit);
0f8b5cc5
AS		 1381}
1382
349e7104
AS		 1383static int brcmf_fws_dbg_seqnum_check(struct brcmf_fws_info *fws, u8 *data)
1384{
1385 __le32 timestamp;
1386
1387 memcpy(&timestamp, &data[2], sizeof(timestamp));
8071fd61 1388 brcmf_dbg(CTL, "received: seq %d, timestamp %d\n", data[1],
349e7104
AS		 1389 le32_to_cpu(timestamp));
1390 return 0;
1391}
1392
1393/* using macro so sparse checking does not complain
1394 * about locking imbalance.
1395 */
1396#define brcmf_fws_lock(drvr, flags) \
1397do { \
1398 flags = 0; \
1399 spin_lock_irqsave(&((drvr)->fws_spinlock), (flags)); \
1400} while (0)
1401
1402/* using macro so sparse checking does not complain
1403 * about locking imbalance.
1404 */
1405#define brcmf_fws_unlock(drvr, flags) \
1406 spin_unlock_irqrestore(&((drvr)->fws_spinlock), (flags))
1407
43fa635e
AS		 1408static int brcmf_fws_notify_credit_map(struct brcmf_if *ifp,
1409 const struct brcmf_event_msg *e,
1410 void *data)
1411{
1412 struct brcmf_fws_info *fws = ifp->drvr->fws;
1413 int i;
1414 ulong flags;
1415 u8 *credits = data;
1416
84bcc0c3
AS		 1417 if (e->datalen < BRCMF_FWS_FIFO_COUNT) {
1418 brcmf_err("event payload too small (%d)\n", e->datalen);
1419 return -EINVAL;
1420 }
0d24b0ea
HM		 1421 if (fws->creditmap_received)
1422 return 0;
1423
1424 fws->creditmap_received = true;
84bcc0c3
AS		 1425
1426 brcmf_dbg(TRACE, "enter: credits %pM\n", credits);
43fa635e 1427 brcmf_fws_lock(ifp->drvr, flags);
84bcc0c3
AS		 1428 for (i = 0; i < ARRAY_SIZE(fws->fifo_credit); i++) {
1429 if (*credits)
1430 fws->fifo_credit_map |= 1 << i;
1431 else
1432 fws->fifo_credit_map &= ~(1 << i);
43fa635e 1433 fws->fifo_credit[i] = *credits++;
84bcc0c3
AS		 1434 }
1435 brcmf_fws_schedule_deq(fws);
43fa635e
AS		 1436 brcmf_fws_unlock(ifp->drvr, flags);
1437 return 0;
1438}
1439
7d747037
HM		 1440static int brcmf_fws_notify_bcmc_credit_support(struct brcmf_if *ifp,
1441 const struct brcmf_event_msg *e,
1442 void *data)
1443{
1444 struct brcmf_fws_info *fws = ifp->drvr->fws;
1445 ulong flags;
1446
1447 brcmf_fws_lock(ifp->drvr, flags);
1448 if (fws)
1449 fws->bcmc_credit_check = true;
1450 brcmf_fws_unlock(ifp->drvr, flags);
1451 return 0;
1452}
1453
349e7104
AS		 1454int brcmf_fws_hdrpull(struct brcmf_pub *drvr, int ifidx, s16 signal_len,
1455 struct sk_buff *skb)
1456{
1457 struct brcmf_fws_info *fws = drvr->fws;
1458 ulong flags;
1459 u8 *signal_data;
1460 s16 data_len;
1461 u8 type;
1462 u8 len;
1463 u8 *data;
a5e9d805
AS		 1464 s32 status;
1465 s32 err;
349e7104 1466
8071fd61 1467 brcmf_dbg(HDRS, "enter: ifidx %d, skblen %u, sig %d\n",
349e7104
AS		 1468 ifidx, skb->len, signal_len);
1469
1470 WARN_ON(signal_len > skb->len);
1471
1472 /* if flow control disabled, skip to packet data and leave */
1473 if (!signal_len || !drvr->fw_signals) {
1474 skb_pull(skb, signal_len);
1475 return 0;
1476 }
1477
1478 /* lock during tlv parsing */
1479 brcmf_fws_lock(drvr, flags);
1480
1481 fws->stats.header_pulls++;
1482 data_len = signal_len;
1483 signal_data = skb->data;
1484
a5e9d805 1485 status = BRCMF_FWS_RET_OK_NOSCHEDULE;
349e7104
AS		 1486 while (data_len > 0) {
1487 /* extract tlv info */
1488 type = signal_data[0];
1489
1490 /* FILLER type is actually not a TLV, but
1491 * a single byte that can be skipped.
1492 */
1493 if (type == BRCMF_FWS_TYPE_FILLER) {
1494 signal_data += 1;
1495 data_len -= 1;
1496 continue;
1497 }
1498 len = signal_data[1];
1499 data = signal_data + 2;
1500
8071fd61
AS		 1501 brcmf_dbg(HDRS, "tlv type=%s (%d), len=%d (%d)\n",
1502 brcmf_fws_get_tlv_name(type), type, len,
1503 brcmf_fws_get_tlv_len(fws, type));
2af15580 1504
349e7104
AS		 1505 /* abort parsing when length invalid */
1506 if (data_len < len + 2)
1507 break;
1508
f55d94a6 1509 if (len < brcmf_fws_get_tlv_len(fws, type))
bb8c8063
AS		 1510 break;
1511
a5e9d805 1512 err = BRCMF_FWS_RET_OK_NOSCHEDULE;
349e7104 1513 switch (type) {
349e7104 1514 case BRCMF_FWS_TYPE_HOST_REORDER_RXPKTS:
bb8c8063 1515 case BRCMF_FWS_TYPE_COMP_TXSTATUS:
ce814c1b 1516 break;
bb8c8063
AS		 1517 case BRCMF_FWS_TYPE_MACDESC_ADD:
1518 case BRCMF_FWS_TYPE_MACDESC_DEL:
ce814c1b 1519 brcmf_fws_macdesc_indicate(fws, type, data);
bb8c8063 1520 break;
33753d47
AS		 1521 case BRCMF_FWS_TYPE_MAC_OPEN:
1522 case BRCMF_FWS_TYPE_MAC_CLOSE:
a5e9d805 1523 err = brcmf_fws_macdesc_state_indicate(fws, type, data);
33753d47
AS		 1524 break;
1525 case BRCMF_FWS_TYPE_INTERFACE_OPEN:
1526 case BRCMF_FWS_TYPE_INTERFACE_CLOSE:
a5e9d805
AS		 1527 err = brcmf_fws_interface_state_indicate(fws, type,
1528 data);
33753d47 1529 break;
5f38b683
AS		 1530 case BRCMF_FWS_TYPE_MAC_REQUEST_CREDIT:
1531 case BRCMF_FWS_TYPE_MAC_REQUEST_PACKET:
a5e9d805 1532 err = brcmf_fws_request_indicate(fws, type, data);
5f38b683 1533 break;
3edc1cff
AS		 1534 case BRCMF_FWS_TYPE_TXSTATUS:
1535 brcmf_fws_txstatus_indicate(fws, data);
1536 break;
84bcc0c3 1537 case BRCMF_FWS_TYPE_FIFO_CREDITBACK:
a5e9d805 1538 err = brcmf_fws_fifocreditback_indicate(fws, data);
84bcc0c3 1539 break;
bb8c8063
AS		 1540 case BRCMF_FWS_TYPE_RSSI:
1541 brcmf_fws_rssi_indicate(fws, *data);
349e7104
AS		 1542 break;
1543 case BRCMF_FWS_TYPE_TRANS_ID:
349e7104
AS		 1544 brcmf_fws_dbg_seqnum_check(fws, data);
1545 break;
84bcc0c3
AS		 1546 case BRCMF_FWS_TYPE_PKTTAG:
1547 case BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP:
349e7104
AS		 1548 default:
1549 fws->stats.tlv_invalid_type++;
1550 break;
1551 }
a5e9d805
AS		 1552 if (err == BRCMF_FWS_RET_OK_SCHEDULE)
1553 status = BRCMF_FWS_RET_OK_SCHEDULE;
349e7104
AS		 1554 signal_data += len + 2;
1555 data_len -= len + 2;
1556 }
1557
1558 if (data_len != 0)
1559 fws->stats.tlv_parse_failed++;
1560
a5e9d805
AS		 1561 if (status == BRCMF_FWS_RET_OK_SCHEDULE)
1562 brcmf_fws_schedule_deq(fws);
1563
349e7104
AS		 1564 /* signalling processing result does
1565 * not affect the actual ethernet packet.
1566 */
1567 skb_pull(skb, signal_len);
1568
1569 /* this may be a signal-only packet
1570 */
1571 if (skb->len == 0)
1572 fws->stats.header_only_pkt++;
1573
1574 brcmf_fws_unlock(drvr, flags);
1575 return 0;
1576}
bb8c8063 1577
3edc1cff
AS		 1578static int brcmf_fws_precommit_skb(struct brcmf_fws_info *fws, int fifo,
1579 struct sk_buff *p)
1580{
1581 struct brcmf_skbuff_cb *skcb = brcmf_skbcb(p);
1582 struct brcmf_fws_mac_descriptor *entry = skcb->mac;
1583 int rc = 0;
be4910ad 1584 bool first_time;
3edc1cff
AS		 1585 int hslot = BRCMF_FWS_HANGER_MAXITEMS;
1586 u8 free_ctr;
3edc1cff
AS		 1587 u8 flags;
1588
be4910ad 1589 first_time = skcb->state != BRCMF_FWS_SKBSTATE_SUPPRESSED;
3edc1cff 1590
be4910ad
HM		 1591 brcmf_skb_if_flags_set_field(p, TRANSMIT, 1);
1592 brcmf_skb_htod_tag_set_field(p, FIFO, fifo);
1593 brcmf_skb_htod_tag_set_field(p, GENERATION, entry->generation);
1594 flags = BRCMF_FWS_HTOD_FLAG_PKTFROMHOST;
fa587d4b 1595 if (brcmf_skb_if_flags_get_field(p, REQUESTED)) {
be4910ad
HM		 1596 /*
1597 * Indicate that this packet is being sent in response to an
1598 * explicit request from the firmware side.
1599 */
1600 flags |= BRCMF_FWS_HTOD_FLAG_PKT_REQUESTED;
1601 }
1602 brcmf_skb_htod_tag_set_field(p, FLAGS, flags);
1603 if (first_time) {
3edc1cff
AS		 1604 /* obtaining free slot may fail, but that will be caught
1605 * by the hanger push. This assures the packet has a BDC
1606 * header upon return.
1607 */
1608 hslot = brcmf_fws_hanger_get_free_slot(&fws->hanger);
1609 free_ctr = entry->seq[fifo];
1610 brcmf_skb_htod_tag_set_field(p, HSLOT, hslot);
1611 brcmf_skb_htod_tag_set_field(p, FREERUN, free_ctr);
3edc1cff
AS		 1612 rc = brcmf_fws_hanger_pushpkt(&fws->hanger, p, hslot);
1613 if (rc)
1614 brcmf_err("hanger push failed: rc=%d\n", rc);
3edc1cff
AS		 1615 }
1616
2747e5f7
HM		 1617 if (rc == 0)
1618 brcmf_fws_hdrpush(fws, p);
1619
3edc1cff
AS		 1620 return rc;
1621}
1622
88f656fa 1623static void
51f6dd9d
AS		 1624brcmf_fws_rollback_toq(struct brcmf_fws_info *fws,
1625 struct sk_buff *skb, int fifo)
84bcc0c3
AS		 1626{
1627 /*
1628 put the packet back to the head of queue
1629
1630 - suppressed packet goes back to suppress sub-queue
1631 - pull out the header, if new or delayed packet
1632
1633 Note: hslot is used only when header removal is done.
1634 */
1635 struct brcmf_fws_mac_descriptor *entry;
1636 enum brcmf_fws_skb_state state;
1637 struct sk_buff *pktout;
1638 int rc = 0;
84bcc0c3 1639 int hslot;
84bcc0c3 1640
84bcc0c3
AS		 1641 state = brcmf_skbcb(skb)->state;
1642 entry = brcmf_skbcb(skb)->mac;
fa587d4b 1643 hslot = brcmf_skb_htod_tag_get_field(skb, HSLOT);
84bcc0c3
AS		 1644
1645 if (entry != NULL) {
1646 if (state == BRCMF_FWS_SKBSTATE_SUPPRESSED) {
1647 /* wl-header is saved for suppressed packets */
1648 pktout = brcmu_pktq_penq_head(&entry->psq, 2 * fifo + 1,
1649 skb);
1650 if (pktout == NULL) {
1651 brcmf_err("suppress queue full\n");
1652 rc = -ENOSPC;
1653 }
1654 } else {
84bcc0c3
AS		 1655 /* delay-q packets are going to delay-q */
1656 pktout = brcmu_pktq_penq_head(&entry->psq,
1657 2 * fifo, skb);
1658 if (pktout == NULL) {
1659 brcmf_err("delay queue full\n");
1660 rc = -ENOSPC;
1661 }
1662
1663 /* free the hanger slot */
1664 brcmf_fws_hanger_poppkt(&fws->hanger, hslot, &pktout,
1665 true);
1666
1667 /* decrement sequence count */
1668 entry->seq[fifo]--;
1669 }
84bcc0c3
AS		 1670 } else {
1671 brcmf_err("no mac entry linked\n");
1672 rc = -ENOENT;
1673 }
1674
67994fa2 1675 if (rc) {
84bcc0c3 1676 fws->stats.rollback_failed++;
fa587d4b
HM		 1677 brcmf_fws_txs_process(fws, BRCMF_FWS_TXSTATUS_HOST_TOSSED,
1678 hslot, 0);
289ec1c7 1679 } else {
84bcc0c3 1680 fws->stats.rollback_success++;
fa587d4b
HM		 1681 brcmf_fws_return_credits(fws, fifo, 1);
1682 brcmf_fws_macdesc_return_req_credit(skb);
289ec1c7 1683 }
84bcc0c3
AS		 1684}
1685
1aac1e91
AS		 1686static int brcmf_fws_borrow_credit(struct brcmf_fws_info *fws)
1687{
1688 int lender_ac;
1689
afc3bbfc
HM		 1690 if (time_after(fws->borrow_defer_timestamp, jiffies)) {
1691 fws->fifo_credit_map &= ~(1 << BRCMF_FWS_FIFO_AC_BE);
1aac1e91 1692 return -ENAVAIL;
afc3bbfc 1693 }
1aac1e91
AS		 1694
1695 for (lender_ac = 0; lender_ac <= BRCMF_FWS_FIFO_AC_VO; lender_ac++) {
1696 if (fws->fifo_credit[lender_ac]) {
1697 fws->credits_borrowed[lender_ac]++;
1698 fws->fifo_credit[lender_ac]--;
1699 if (fws->fifo_credit[lender_ac] == 0)
1700 fws->fifo_credit_map &= ~(1 << lender_ac);
afc3bbfc 1701 fws->fifo_credit_map |= (1 << BRCMF_FWS_FIFO_AC_BE);
8071fd61 1702 brcmf_dbg(DATA, "borrow credit from: %d\n", lender_ac);
1aac1e91
AS		 1703 return 0;
1704 }
1705 }
afc3bbfc 1706 fws->fifo_credit_map &= ~(1 << BRCMF_FWS_FIFO_AC_BE);
1aac1e91
AS		 1707 return -ENAVAIL;
1708}
1709
3edc1cff
AS		 1710static int brcmf_fws_commit_skb(struct brcmf_fws_info *fws, int fifo,
1711 struct sk_buff *skb)
1712{
1713 struct brcmf_skbuff_cb *skcb = brcmf_skbcb(skb);
1714 struct brcmf_fws_mac_descriptor *entry;
1715 struct brcmf_bus *bus = fws->drvr->bus_if;
1716 int rc;
2747e5f7 1717 u8 ifidx;
3edc1cff
AS		 1718
1719 entry = skcb->mac;
1720 if (IS_ERR(entry))
1721 return PTR_ERR(entry);
1722
1723 rc = brcmf_fws_precommit_skb(fws, fifo, skb);
1724 if (rc < 0) {
1725 fws->stats.generic_error++;
84bcc0c3 1726 goto rollback;
3edc1cff
AS		 1727 }
1728
8071fd61
AS		 1729 brcmf_dbg(DATA, "%s flags %X htod %X\n", entry->name, skcb->if_flags,
1730 skcb->htod);
3edc1cff 1731 rc = brcmf_bus_txdata(bus, skb);
2747e5f7
HM		 1732 if (rc < 0) {
1733 brcmf_proto_hdrpull(fws->drvr, false, &ifidx, skb);
84bcc0c3 1734 goto rollback;
2747e5f7 1735 }
3edc1cff 1736
8c5140f6
HM		 1737 entry->transit_count++;
1738 if (entry->suppressed)
1739 entry->suppr_transit_count++;
3edc1cff
AS		 1740 entry->seq[fifo]++;
1741 fws->stats.pkt2bus++;
cf3a6872 1742 fws->stats.send_pkts[fifo]++;
fa587d4b
HM		 1743 if (brcmf_skb_if_flags_get_field(skb, REQUESTED))
1744 fws->stats.requested_sent[fifo]++;
84bcc0c3 1745
3edc1cff
AS		 1746 return rc;
1747
84bcc0c3 1748rollback:
51f6dd9d 1749 brcmf_fws_rollback_toq(fws, skb, fifo);
3edc1cff
AS		 1750 return rc;
1751}
1752
1753int brcmf_fws_process_skb(struct brcmf_if *ifp, struct sk_buff *skb)
1754{
1755 struct brcmf_pub *drvr = ifp->drvr;
1aac1e91 1756 struct brcmf_fws_info *fws = drvr->fws;
3edc1cff
AS		 1757 struct brcmf_skbuff_cb *skcb = brcmf_skbcb(skb);
1758 struct ethhdr *eh = (struct ethhdr *)(skb->data);
1759 ulong flags;
3edc1cff
AS		 1760 int fifo = BRCMF_FWS_FIFO_BCMC;
1761 bool multicast = is_multicast_ether_addr(eh->h_dest);
1762
1763 /* determine the priority */
1764 if (!skb->priority)
1765 skb->priority = cfg80211_classify8021d(skb);
1766
1767 drvr->tx_multicast += !!multicast;
1768 if (ntohs(eh->h_proto) == ETH_P_PAE)
1769 atomic_inc(&ifp->pend_8021x_cnt);
1770
1aac1e91 1771 if (!brcmf_fws_fc_active(fws)) {
3edc1cff 1772 /* If the protocol uses a data header, apply it */
31ed07dc 1773 brcmf_proto_hdrpush(drvr, ifp->ifidx, 0, skb);
3edc1cff
AS		 1774
1775 /* Use bus module to send data frame */
1776 return brcmf_bus_txdata(drvr->bus_if, skb);
1777 }
1778
1779 /* set control buffer information */
84bcc0c3 1780 skcb->if_flags = 0;
1ab083a3 1781 skcb->mac = brcmf_fws_macdesc_find(fws, ifp, eh->h_dest);
3edc1cff 1782 skcb->state = BRCMF_FWS_SKBSTATE_NEW;
31ed07dc 1783 brcmf_skb_if_flags_set_field(skb, INDEX, ifp->ifidx);
3edc1cff
AS		 1784 if (!multicast)
1785 fifo = brcmf_fws_prio2fifo[skb->priority];
3edc1cff 1786
8071fd61
AS		 1787 brcmf_dbg(DATA, "%s mac %pM multi %d fifo %d\n", skcb->mac->name,
1788 eh->h_dest, multicast, fifo);
3edc1cff
AS		 1789
1790 brcmf_fws_lock(drvr, flags);
20863746
AS		 1791 brcmf_fws_enq(fws, BRCMF_FWS_SKBSTATE_DELAYED, fifo, skb);
1792 if (fifo != BRCMF_FWS_FIFO_AC_BE && fifo < BRCMF_FWS_FIFO_BCMC)
1793 fws->borrow_defer_timestamp = jiffies +
1794 BRCMF_FWS_BORROW_DEFER_PERIOD;
3edc1cff 1795 brcmf_fws_unlock(drvr, flags);
20863746 1796 brcmf_fws_schedule_deq(fws);
3edc1cff
AS		 1797 return 0;
1798}
1799
bb8c8063
AS		 1800void brcmf_fws_reset_interface(struct brcmf_if *ifp)
1801{
1802 struct brcmf_fws_mac_descriptor *entry = ifp->fws_desc;
1803
1804 brcmf_dbg(TRACE, "enter: idx=%d\n", ifp->bssidx);
1805 if (!entry)
1806 return;
1807
1ab083a3 1808 brcmf_fws_macdesc_init(entry, ifp->mac_addr, ifp->ifidx);
bb8c8063
AS		 1809}
1810
1811void brcmf_fws_add_interface(struct brcmf_if *ifp)
1812{
84bcc0c3 1813 struct brcmf_fws_info *fws = ifp->drvr->fws;
bb8c8063
AS		 1814 struct brcmf_fws_mac_descriptor *entry;
1815
01b8e7db 1816 if (!ifp->ndev || !ifp->drvr->fw_signals)
bb8c8063
AS		 1817 return;
1818
84bcc0c3
AS		 1819 entry = &fws->desc.iface[ifp->ifidx];
1820 ifp->fws_desc = entry;
1ab083a3 1821 brcmf_fws_macdesc_init(entry, ifp->mac_addr, ifp->ifidx);
8071fd61 1822 brcmf_fws_macdesc_set_name(fws, entry);
84bcc0c3
AS		 1823 brcmu_pktq_init(&entry->psq, BRCMF_FWS_PSQ_PREC_COUNT,
1824 BRCMF_FWS_PSQ_LEN);
8071fd61 1825 brcmf_dbg(TRACE, "added %s\n", entry->name);
bb8c8063
AS		 1826}
1827
1828void brcmf_fws_del_interface(struct brcmf_if *ifp)
1829{
1830 struct brcmf_fws_mac_descriptor *entry = ifp->fws_desc;
6d421e54 1831 ulong flags;
bb8c8063 1832
bb8c8063
AS		 1833 if (!entry)
1834 return;
1835
6d421e54 1836 brcmf_fws_lock(ifp->drvr, flags);
bb8c8063 1837 ifp->fws_desc = NULL;
8071fd61 1838 brcmf_dbg(TRACE, "deleting %s\n", entry->name);
1ab083a3 1839 brcmf_fws_macdesc_deinit(entry);
a3e993c7 1840 brcmf_fws_cleanup(ifp->drvr->fws, ifp->ifidx);
6d421e54 1841 brcmf_fws_unlock(ifp->drvr, flags);
84bcc0c3
AS		 1842}
1843
1844static void brcmf_fws_dequeue_worker(struct work_struct *worker)
1845{
1846 struct brcmf_fws_info *fws;
1847 struct sk_buff *skb;
1848 ulong flags;
1849 int fifo;
84bcc0c3
AS		 1850
1851 fws = container_of(worker, struct brcmf_fws_info, fws_dequeue_work);
1852
84bcc0c3 1853 brcmf_fws_lock(fws->drvr, flags);
df50f756
HM		 1854 for (fifo = NL80211_NUM_ACS; fifo >= 0 && !fws->bus_flow_blocked;
1855 fifo--) {
7d747037
HM		 1856 while ((fws->fifo_credit[fifo]) || ((!fws->bcmc_credit_check) &&
1857 (fifo == BRCMF_FWS_FIFO_BCMC))) {
84bcc0c3 1858 skb = brcmf_fws_deq(fws, fifo);
289ec1c7 1859 if (!skb)
84bcc0c3 1860 break;
fa587d4b 1861 fws->fifo_credit[fifo]--;
289ec1c7
AS		 1862 if (brcmf_fws_commit_skb(fws, fifo, skb))
1863 break;
df50f756
HM		 1864 if (fws->bus_flow_blocked)
1865 break;
84bcc0c3 1866 }
1aac1e91 1867 if ((fifo == BRCMF_FWS_FIFO_AC_BE) &&
289ec1c7 1868 (fws->fifo_credit[fifo] == 0) &&
df50f756 1869 (!fws->bus_flow_blocked)) {
1aac1e91
AS		 1870 while (brcmf_fws_borrow_credit(fws) == 0) {
1871 skb = brcmf_fws_deq(fws, fifo);
1872 if (!skb) {
1873 brcmf_fws_return_credits(fws, fifo, 1);
1874 break;
1875 }
eb2410cd
HM		 1876 if (brcmf_fws_commit_skb(fws, fifo, skb))
1877 break;
df50f756
HM		 1878 if (fws->bus_flow_blocked)
1879 break;
1aac1e91 1880 }
1aac1e91 1881 }
84bcc0c3
AS		 1882 }
1883 brcmf_fws_unlock(fws->drvr, flags);
bb8c8063 1884}
c7f34a69 1885
d9337414
AS		 1886int brcmf_fws_init(struct brcmf_pub *drvr)
1887{
290fb763 1888 u32 tlv = BRCMF_FWS_FLAGS_RSSI_SIGNALS;
d9337414
AS		 1889 int rc;
1890
47829f4f
AS		 1891 if (!drvr->fw_signals)
1892 return 0;
1893
d9337414
AS		 1894 spin_lock_init(&drvr->fws_spinlock);
1895
1896 drvr->fws = kzalloc(sizeof(*(drvr->fws)), GFP_KERNEL);
1897 if (!drvr->fws) {
1898 rc = -ENOMEM;
1899 goto fail;
1900 }
1901
1902 /* set linkage back */
1903 drvr->fws->drvr = drvr;
1904 drvr->fws->fcmode = fcmode;
1905
84bcc0c3
AS		 1906 drvr->fws->fws_wq = create_singlethread_workqueue("brcmf_fws_wq");
1907 if (drvr->fws->fws_wq == NULL) {
1908 brcmf_err("workqueue creation failed\n");
1909 rc = -EBADF;
1910 goto fail;
1911 }
1912 INIT_WORK(&drvr->fws->fws_dequeue_work, brcmf_fws_dequeue_worker);
1913
290fb763
AS		 1914 /* enable firmware signalling if fcmode active */
1915 if (drvr->fws->fcmode != BRCMF_FWS_FCMODE_NONE)
1916 tlv |= BRCMF_FWS_FLAGS_XONXOFF_SIGNALS |
33753d47
AS		 1917 BRCMF_FWS_FLAGS_CREDIT_STATUS_SIGNALS |
1918 BRCMF_FWS_FLAGS_HOST_PROPTXSTATUS_ACTIVE;
290fb763 1919
a786b38d
AS		 1920 rc = brcmf_fweh_register(drvr, BRCMF_E_FIFO_CREDIT_MAP,
1921 brcmf_fws_notify_credit_map);
d9337414 1922 if (rc < 0) {
a786b38d 1923 brcmf_err("register credit map handler failed\n");
d9337414
AS		 1924 goto fail;
1925 }
7d747037
HM		 1926 rc = brcmf_fweh_register(drvr, BRCMF_E_BCMC_CREDIT_SUPPORT,
1927 brcmf_fws_notify_bcmc_credit_support);
1928 if (rc < 0) {
1929 brcmf_err("register bcmc credit handler failed\n");
1930 brcmf_fweh_unregister(drvr, BRCMF_E_FIFO_CREDIT_MAP);
1931 goto fail;
1932 }
d9337414 1933
a786b38d
AS		 1934 /* setting the iovar may fail if feature is unsupported
1935 * so leave the rc as is so driver initialization can
1936 * continue.
1937 */
1938 if (brcmf_fil_iovar_int_set(drvr->iflist[0], "tlv", tlv)) {
1939 brcmf_err("failed to set bdcv2 tlv signaling\n");
1940 goto fail_event;
d9337414
AS		 1941 }
1942
1943 brcmf_fws_hanger_init(&drvr->fws->hanger);
1ab083a3 1944 brcmf_fws_macdesc_init(&drvr->fws->desc.other, NULL, 0);
8071fd61 1945 brcmf_fws_macdesc_set_name(drvr->fws, &drvr->fws->desc.other);
84bcc0c3
AS		 1946 brcmu_pktq_init(&drvr->fws->desc.other.psq, BRCMF_FWS_PSQ_PREC_COUNT,
1947 BRCMF_FWS_PSQ_LEN);
d9337414
AS		 1948
1949 /* create debugfs file for statistics */
1950 brcmf_debugfs_create_fws_stats(drvr, &drvr->fws->stats);
1951
8071fd61 1952 brcmf_dbg(INFO, "%s bdcv2 tlv signaling [%x]\n",
d9337414
AS		 1953 drvr->fw_signals ? "enabled" : "disabled", tlv);
1954 return 0;
1955
a786b38d 1956fail_event:
7d747037 1957 brcmf_fweh_unregister(drvr, BRCMF_E_BCMC_CREDIT_SUPPORT);
a786b38d 1958 brcmf_fweh_unregister(drvr, BRCMF_E_FIFO_CREDIT_MAP);
d9337414 1959fail:
d9337414
AS		 1960 brcmf_fws_deinit(drvr);
1961 return rc;
1962}
1963
1964void brcmf_fws_deinit(struct brcmf_pub *drvr)
1965{
1966 struct brcmf_fws_info *fws = drvr->fws;
1967 ulong flags;
1968
47829f4f
AS		 1969 if (!fws)
1970 return;
1971
a786b38d
AS		 1972 /* disable firmware signalling entirely
1973 * to avoid using the workqueue.
1974 */
1975 drvr->fw_signals = false;
1976
1977 if (drvr->fws->fws_wq)
1978 destroy_workqueue(drvr->fws->fws_wq);
1979
d9337414
AS		 1980 /* cleanup */
1981 brcmf_fws_lock(drvr, flags);
1982 brcmf_fws_cleanup(fws, -1);
1983 drvr->fws = NULL;
1984 brcmf_fws_unlock(drvr, flags);
1985
1986 /* free top structure */
1987 kfree(fws);
1988}
1989
c7f34a69
AS		 1990bool brcmf_fws_fc_active(struct brcmf_fws_info *fws)
1991{
1992 if (!fws)
1993 return false;
1994
c7f34a69
AS		 1995 return fws->fcmode != BRCMF_FWS_FCMODE_NONE;
1996}
0f8b5cc5
AS		 1997
1998void brcmf_fws_bustxfail(struct brcmf_fws_info *fws, struct sk_buff *skb)
1999{
2000 ulong flags;
fa587d4b 2001 u32 hslot;
0f8b5cc5 2002
c7773fc1
AS		 2003 if (brcmf_skbcb(skb)->state == BRCMF_FWS_SKBSTATE_TIM) {
2004 brcmu_pkt_buf_free_skb(skb);
2005 return;
2006 }
0f8b5cc5 2007 brcmf_fws_lock(fws->drvr, flags);
fa587d4b
HM		 2008 hslot = brcmf_skb_htod_tag_get_field(skb, HSLOT);
2009 brcmf_fws_txs_process(fws, BRCMF_FWS_TXSTATUS_HOST_TOSSED, hslot, 0);
0f8b5cc5
AS		 2010 brcmf_fws_unlock(fws->drvr, flags);
2011}
df50f756
HM		 2012
2013void brcmf_fws_bus_blocked(struct brcmf_pub *drvr, bool flow_blocked)
2014{
2015 struct brcmf_fws_info *fws = drvr->fws;
2016
2017 fws->bus_flow_blocked = flow_blocked;
2018 if (!flow_blocked)
2019 brcmf_fws_schedule_deq(fws);
5631becb
AS		 2020 else
2021 fws->stats.bus_flow_block++;
df50f756 2022}
Linux kernel - Deliverables
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