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brcmfmac: Make FWS queueing configurable.
[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"
30#include "dhd_dbg.h"
e2432b67 31#include "dhd_bus.h"
349e7104 32#include "fwil.h"
a7965fbb 33#include "fwil_types.h"
349e7104
AS		 34#include "fweh.h"
35#include "fwsignal.h"
a7965fbb
AS		 36#include "p2p.h"
37#include "wl_cfg80211.h"
85b84133 38#include "proto.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
1e86d696 108
349e7104
AS		 109static const char *brcmf_fws_get_tlv_name(enum brcmf_fws_tlv_type id)
110{
111 int i;
112
113 for (i = 0; i < ARRAY_SIZE(brcmf_fws_tlv_names); i++)
114 if (brcmf_fws_tlv_names[i].id == id)
115 return brcmf_fws_tlv_names[i].name;
116
117 return "INVALID";
118}
119#else
120static const char *brcmf_fws_get_tlv_name(enum brcmf_fws_tlv_type id)
121{
122 return "NODEBUG";
123}
124#endif /* DEBUG */
125
9a9e405f
AS		 126/*
127 * The PKTTAG tlv has additional bytes when firmware-signalling
128 * mode has REUSESEQ flag set.
129 */
130#define BRCMF_FWS_TYPE_SEQ_LEN 2
131
3edc1cff 132/*
349e7104
AS		 133 * flags used to enable tlv signalling from firmware.
134 */
bb8c8063
AS		 135#define BRCMF_FWS_FLAGS_RSSI_SIGNALS 0x0001
136#define BRCMF_FWS_FLAGS_XONXOFF_SIGNALS 0x0002
137#define BRCMF_FWS_FLAGS_CREDIT_STATUS_SIGNALS 0x0004
138#define BRCMF_FWS_FLAGS_HOST_PROPTXSTATUS_ACTIVE 0x0008
139#define BRCMF_FWS_FLAGS_PSQ_GENERATIONFSM_ENABLE 0x0010
140#define BRCMF_FWS_FLAGS_PSQ_ZERO_BUFFER_ENABLE 0x0020
141#define BRCMF_FWS_FLAGS_HOST_RXREORDER_ACTIVE 0x0040
142
349e7104 143#define BRCMF_FWS_MAC_DESC_TABLE_SIZE 32
349e7104
AS		 144#define BRCMF_FWS_MAC_DESC_ID_INVALID 0xff
145
146#define BRCMF_FWS_HOSTIF_FLOWSTATE_OFF 0
147#define BRCMF_FWS_HOSTIF_FLOWSTATE_ON 1
84bcc0c3
AS		 148#define BRCMF_FWS_FLOWCONTROL_HIWATER 128
149#define BRCMF_FWS_FLOWCONTROL_LOWATER 64
349e7104 150
ae664609 151#define BRCMF_FWS_PSQ_PREC_COUNT ((BRCMF_FWS_FIFO_COUNT + 1) * 2)
bb8c8063
AS		 152#define BRCMF_FWS_PSQ_LEN 256
153
3edc1cff
AS		 154#define BRCMF_FWS_HTOD_FLAG_PKTFROMHOST 0x01
155#define BRCMF_FWS_HTOD_FLAG_PKT_REQUESTED 0x02
156
1e86d696
HM		 157#define BRCMF_FWS_RET_OK_NOSCHEDULE 0
158#define BRCMF_FWS_RET_OK_SCHEDULE 1
159
160#define BRCMF_FWS_MODE_REUSESEQ_SHIFT 3 /* seq reuse */
161#define BRCMF_FWS_MODE_SET_REUSESEQ(x, val) ((x) = \
162 ((x) & ~(1 << BRCMF_FWS_MODE_REUSESEQ_SHIFT)) | \
163 (((val) & 1) << BRCMF_FWS_MODE_REUSESEQ_SHIFT))
164#define BRCMF_FWS_MODE_GET_REUSESEQ(x) \
165 (((x) >> BRCMF_FWS_MODE_REUSESEQ_SHIFT) & 1)
a5e9d805 166
ebb93883
AS		 167/**
168 * enum brcmf_fws_skb_state - indicates processing state of skb.
3edc1cff
AS		 169 *
170 * @BRCMF_FWS_SKBSTATE_NEW: sk_buff is newly arrived in the driver.
171 * @BRCMF_FWS_SKBSTATE_DELAYED: sk_buff had to wait on queue.
172 * @BRCMF_FWS_SKBSTATE_SUPPRESSED: sk_buff has been suppressed by firmware.
c7773fc1 173 * @BRCMF_FWS_SKBSTATE_TIM: allocated for TIM update info.
ebb93883
AS		 174 */
175enum brcmf_fws_skb_state {
3edc1cff
AS		 176 BRCMF_FWS_SKBSTATE_NEW,
177 BRCMF_FWS_SKBSTATE_DELAYED,
c7773fc1
AS		 178 BRCMF_FWS_SKBSTATE_SUPPRESSED,
179 BRCMF_FWS_SKBSTATE_TIM
ebb93883
AS		 180};
181
182/**
183 * struct brcmf_skbuff_cb - control buffer associated with skbuff.
184 *
5491c11c 185 * @bus_flags: 2 bytes reserved for bus specific parameters
ebb93883 186 * @if_flags: holds interface index and packet related flags.
ebb93883 187 * @htod: host to device packet identifier (used in PKTTAG tlv).
1e86d696 188 * @htod_seq: this 16-bit is original seq number for every suppress packet.
ebb93883
AS		 189 * @state: transmit state of the packet.
190 * @mac: descriptor related to destination for this packet.
191 *
192 * This information is stored in control buffer struct sk_buff::cb, which
193 * provides 48 bytes of storage so this structure should not exceed that.
194 */
195struct brcmf_skbuff_cb {
5491c11c 196 u16 bus_flags;
ebb93883 197 u16 if_flags;
ebb93883 198 u32 htod;
1e86d696 199 u16 htod_seq;
ebb93883
AS		 200 enum brcmf_fws_skb_state state;
201 struct brcmf_fws_mac_descriptor *mac;
202};
203
3edc1cff 204/*
ebb93883
AS		 205 * macro casting skbuff control buffer to struct brcmf_skbuff_cb.
206 */
207#define brcmf_skbcb(skb) ((struct brcmf_skbuff_cb *)((skb)->cb))
208
3edc1cff 209/*
ebb93883
AS		 210 * sk_buff control if flags
211 *
fa587d4b 212 * b[11] - packet sent upon firmware request.
ebb93883
AS		 213 * b[10] - packet only contains signalling data.
214 * b[9] - packet is a tx packet.
fa587d4b 215 * b[8] - packet used requested credit
ebb93883 216 * b[7] - interface in AP mode.
ebb93883
AS		 217 * b[3:0] - interface index.
218 */
219#define BRCMF_SKB_IF_FLAGS_REQUESTED_MASK 0x0800
220#define BRCMF_SKB_IF_FLAGS_REQUESTED_SHIFT 11
221#define BRCMF_SKB_IF_FLAGS_SIGNAL_ONLY_MASK 0x0400
222#define BRCMF_SKB_IF_FLAGS_SIGNAL_ONLY_SHIFT 10
223#define BRCMF_SKB_IF_FLAGS_TRANSMIT_MASK 0x0200
224#define BRCMF_SKB_IF_FLAGS_TRANSMIT_SHIFT 9
fa587d4b
HM		 225#define BRCMF_SKB_IF_FLAGS_REQ_CREDIT_MASK 0x0100
226#define BRCMF_SKB_IF_FLAGS_REQ_CREDIT_SHIFT 8
ebb93883
AS		 227#define BRCMF_SKB_IF_FLAGS_IF_AP_MASK 0x0080
228#define BRCMF_SKB_IF_FLAGS_IF_AP_SHIFT 7
ebb93883
AS		 229#define BRCMF_SKB_IF_FLAGS_INDEX_MASK 0x000f
230#define BRCMF_SKB_IF_FLAGS_INDEX_SHIFT 0
231
232#define brcmf_skb_if_flags_set_field(skb, field, value) \
233 brcmu_maskset16(&(brcmf_skbcb(skb)->if_flags), \
234 BRCMF_SKB_IF_FLAGS_ ## field ## _MASK, \
235 BRCMF_SKB_IF_FLAGS_ ## field ## _SHIFT, (value))
236#define brcmf_skb_if_flags_get_field(skb, field) \
237 brcmu_maskget16(brcmf_skbcb(skb)->if_flags, \
238 BRCMF_SKB_IF_FLAGS_ ## field ## _MASK, \
239 BRCMF_SKB_IF_FLAGS_ ## field ## _SHIFT)
240
3edc1cff 241/*
ebb93883
AS		 242 * sk_buff control packet identifier
243 *
244 * 32-bit packet identifier used in PKTTAG tlv from host to dongle.
245 *
246 * - Generated at the host (e.g. dhd)
247 * - Seen as a generic sequence number by firmware except for the flags field.
248 *
249 * Generation : b[31] => generation number for this packet [host->fw]
250 * OR, current generation number [fw->host]
251 * Flags : b[30:27] => command, status flags
252 * FIFO-AC : b[26:24] => AC-FIFO id
253 * h-slot : b[23:8] => hanger-slot
254 * freerun : b[7:0] => A free running counter
255 */
256#define BRCMF_SKB_HTOD_TAG_GENERATION_MASK 0x80000000
257#define BRCMF_SKB_HTOD_TAG_GENERATION_SHIFT 31
258#define BRCMF_SKB_HTOD_TAG_FLAGS_MASK 0x78000000
259#define BRCMF_SKB_HTOD_TAG_FLAGS_SHIFT 27
260#define BRCMF_SKB_HTOD_TAG_FIFO_MASK 0x07000000
261#define BRCMF_SKB_HTOD_TAG_FIFO_SHIFT 24
262#define BRCMF_SKB_HTOD_TAG_HSLOT_MASK 0x00ffff00
263#define BRCMF_SKB_HTOD_TAG_HSLOT_SHIFT 8
264#define BRCMF_SKB_HTOD_TAG_FREERUN_MASK 0x000000ff
be4910ad 265#define BRCMF_SKB_HTOD_TAG_FREERUN_SHIFT 0
ebb93883
AS		 266
267#define brcmf_skb_htod_tag_set_field(skb, field, value) \
e2432b67 268 brcmu_maskset32(&(brcmf_skbcb(skb)->htod), \
ebb93883
AS		 269 BRCMF_SKB_HTOD_TAG_ ## field ## _MASK, \
270 BRCMF_SKB_HTOD_TAG_ ## field ## _SHIFT, (value))
271#define brcmf_skb_htod_tag_get_field(skb, field) \
e2432b67 272 brcmu_maskget32(brcmf_skbcb(skb)->htod, \
ebb93883
AS		 273 BRCMF_SKB_HTOD_TAG_ ## field ## _MASK, \
274 BRCMF_SKB_HTOD_TAG_ ## field ## _SHIFT)
275
1e86d696
HM		 276#define BRCMF_SKB_HTOD_SEQ_FROMFW_MASK 0x2000
277#define BRCMF_SKB_HTOD_SEQ_FROMFW_SHIFT 13
278#define BRCMF_SKB_HTOD_SEQ_FROMDRV_MASK 0x1000
279#define BRCMF_SKB_HTOD_SEQ_FROMDRV_SHIFT 12
280#define BRCMF_SKB_HTOD_SEQ_NR_MASK 0x0fff
281#define BRCMF_SKB_HTOD_SEQ_NR_SHIFT 0
282
283#define brcmf_skb_htod_seq_set_field(skb, field, value) \
284 brcmu_maskset16(&(brcmf_skbcb(skb)->htod_seq), \
285 BRCMF_SKB_HTOD_SEQ_ ## field ## _MASK, \
286 BRCMF_SKB_HTOD_SEQ_ ## field ## _SHIFT, (value))
287#define brcmf_skb_htod_seq_get_field(skb, field) \
288 brcmu_maskget16(brcmf_skbcb(skb)->htod_seq, \
289 BRCMF_SKB_HTOD_SEQ_ ## field ## _MASK, \
290 BRCMF_SKB_HTOD_SEQ_ ## field ## _SHIFT)
291
3edc1cff
AS		 292#define BRCMF_FWS_TXSTAT_GENERATION_MASK 0x80000000
293#define BRCMF_FWS_TXSTAT_GENERATION_SHIFT 31
294#define BRCMF_FWS_TXSTAT_FLAGS_MASK 0x78000000
295#define BRCMF_FWS_TXSTAT_FLAGS_SHIFT 27
296#define BRCMF_FWS_TXSTAT_FIFO_MASK 0x07000000
297#define BRCMF_FWS_TXSTAT_FIFO_SHIFT 24
298#define BRCMF_FWS_TXSTAT_HSLOT_MASK 0x00FFFF00
299#define BRCMF_FWS_TXSTAT_HSLOT_SHIFT 8
1e86d696
HM		 300#define BRCMF_FWS_TXSTAT_FREERUN_MASK 0x000000FF
301#define BRCMF_FWS_TXSTAT_FREERUN_SHIFT 0
3edc1cff
AS		 302
303#define brcmf_txstatus_get_field(txs, field) \
304 brcmu_maskget32(txs, BRCMF_FWS_TXSTAT_ ## field ## _MASK, \
305 BRCMF_FWS_TXSTAT_ ## field ## _SHIFT)
306
1aac1e91
AS		 307/* How long to defer borrowing in jiffies */
308#define BRCMF_FWS_BORROW_DEFER_PERIOD (HZ / 10)
309
3edc1cff
AS		 310/**
311 * enum brcmf_fws_fifo - fifo indices used by dongle firmware.
312 *
c7773fc1 313 * @BRCMF_FWS_FIFO_FIRST: first fifo, ie. background.
3edc1cff
AS		 314 * @BRCMF_FWS_FIFO_AC_BK: fifo for background traffic.
315 * @BRCMF_FWS_FIFO_AC_BE: fifo for best-effort traffic.
316 * @BRCMF_FWS_FIFO_AC_VI: fifo for video traffic.
317 * @BRCMF_FWS_FIFO_AC_VO: fifo for voice traffic.
318 * @BRCMF_FWS_FIFO_BCMC: fifo for broadcast/multicast (AP only).
319 * @BRCMF_FWS_FIFO_ATIM: fifo for ATIM (AP only).
320 * @BRCMF_FWS_FIFO_COUNT: number of fifos.
321 */
322enum brcmf_fws_fifo {
c7773fc1
AS		 323 BRCMF_FWS_FIFO_FIRST,
324 BRCMF_FWS_FIFO_AC_BK = BRCMF_FWS_FIFO_FIRST,
3edc1cff
AS		 325 BRCMF_FWS_FIFO_AC_BE,
326 BRCMF_FWS_FIFO_AC_VI,
327 BRCMF_FWS_FIFO_AC_VO,
328 BRCMF_FWS_FIFO_BCMC,
329 BRCMF_FWS_FIFO_ATIM,
330 BRCMF_FWS_FIFO_COUNT
331};
332
333/**
334 * enum brcmf_fws_txstatus - txstatus flag values.
335 *
336 * @BRCMF_FWS_TXSTATUS_DISCARD:
337 * host is free to discard the packet.
338 * @BRCMF_FWS_TXSTATUS_CORE_SUPPRESS:
339 * 802.11 core suppressed the packet.
340 * @BRCMF_FWS_TXSTATUS_FW_PS_SUPPRESS:
341 * firmware suppress the packet as device is already in PS mode.
342 * @BRCMF_FWS_TXSTATUS_FW_TOSSED:
343 * firmware tossed the packet.
fa587d4b
HM		 344 * @BRCMF_FWS_TXSTATUS_HOST_TOSSED:
345 * host tossed the packet.
3edc1cff
AS		 346 */
347enum brcmf_fws_txstatus {
348 BRCMF_FWS_TXSTATUS_DISCARD,
349 BRCMF_FWS_TXSTATUS_CORE_SUPPRESS,
350 BRCMF_FWS_TXSTATUS_FW_PS_SUPPRESS,
fa587d4b
HM		 351 BRCMF_FWS_TXSTATUS_FW_TOSSED,
352 BRCMF_FWS_TXSTATUS_HOST_TOSSED
3edc1cff
AS		 353};
354
c7f34a69
AS		 355enum brcmf_fws_fcmode {
356 BRCMF_FWS_FCMODE_NONE,
357 BRCMF_FWS_FCMODE_IMPLIED_CREDIT,
358 BRCMF_FWS_FCMODE_EXPLICIT_CREDIT
359};
360
84bcc0c3
AS		 361enum brcmf_fws_mac_desc_state {
362 BRCMF_FWS_STATE_OPEN = 1,
363 BRCMF_FWS_STATE_CLOSE
364};
365
bb8c8063
AS		 366/**
367 * struct brcmf_fws_mac_descriptor - firmware signalling data per node/interface
368 *
369 * @occupied: slot is in use.
ce814c1b 370 * @mac_handle: handle for mac entry determined by firmware.
bb8c8063
AS		 371 * @interface_id: interface index.
372 * @state: current state.
3edc1cff
AS		 373 * @suppressed: mac entry is suppressed.
374 * @generation: generation bit.
bb8c8063
AS		 375 * @ac_bitmap: ac queue bitmap.
376 * @requested_credit: credits requested by firmware.
377 * @ea: ethernet address.
3edc1cff 378 * @seq: per-node free-running sequence.
bb8c8063 379 * @psq: power-save queue.
3edc1cff 380 * @transit_count: packet in transit to firmware.
bb8c8063
AS		 381 */
382struct brcmf_fws_mac_descriptor {
8071fd61 383 char name[16];
bb8c8063 384 u8 occupied;
ce814c1b 385 u8 mac_handle;
bb8c8063
AS		 386 u8 interface_id;
387 u8 state;
3edc1cff
AS		 388 bool suppressed;
389 u8 generation;
bb8c8063
AS		 390 u8 ac_bitmap;
391 u8 requested_credit;
84bcc0c3 392 u8 requested_packet;
bb8c8063 393 u8 ea[ETH_ALEN];
3edc1cff 394 u8 seq[BRCMF_FWS_FIFO_COUNT];
bb8c8063 395 struct pktq psq;
3edc1cff 396 int transit_count;
84bcc0c3
AS		 397 int suppr_transit_count;
398 bool send_tim_signal;
399 u8 traffic_pending_bmp;
400 u8 traffic_lastreported_bmp;
bb8c8063
AS		 401};
402
6971280a
AS		 403#define BRCMF_FWS_HANGER_MAXITEMS 1024
404
405/**
406 * enum brcmf_fws_hanger_item_state - state of hanger item.
407 *
3edc1cff
AS		 408 * @BRCMF_FWS_HANGER_ITEM_STATE_FREE: item is free for use.
409 * @BRCMF_FWS_HANGER_ITEM_STATE_INUSE: item is in use.
410 * @BRCMF_FWS_HANGER_ITEM_STATE_INUSE_SUPPRESSED: item was suppressed.
6971280a
AS		 411 */
412enum brcmf_fws_hanger_item_state {
3edc1cff
AS		 413 BRCMF_FWS_HANGER_ITEM_STATE_FREE = 1,
414 BRCMF_FWS_HANGER_ITEM_STATE_INUSE,
415 BRCMF_FWS_HANGER_ITEM_STATE_INUSE_SUPPRESSED
6971280a
AS		 416};
417
418
419/**
420 * struct brcmf_fws_hanger_item - single entry for tx pending packet.
421 *
422 * @state: entry is either free or occupied.
6971280a
AS		 423 * @pkt: packet itself.
424 */
425struct brcmf_fws_hanger_item {
426 enum brcmf_fws_hanger_item_state state;
6971280a
AS		 427 struct sk_buff *pkt;
428};
429
430/**
431 * struct brcmf_fws_hanger - holds packets awaiting firmware txstatus.
432 *
6971280a
AS		 433 * @pushed: packets pushed to await txstatus.
434 * @popped: packets popped upon handling txstatus.
435 * @failed_to_push: packets that could not be pushed.
436 * @failed_to_pop: packets that could not be popped.
437 * @failed_slotfind: packets for which failed to find an entry.
438 * @slot_pos: last returned item index for a free entry.
439 * @items: array of hanger items.
440 */
441struct brcmf_fws_hanger {
442 u32 pushed;
443 u32 popped;
444 u32 failed_to_push;
445 u32 failed_to_pop;
446 u32 failed_slotfind;
447 u32 slot_pos;
448 struct brcmf_fws_hanger_item items[BRCMF_FWS_HANGER_MAXITEMS];
449};
450
84bcc0c3
AS		 451struct brcmf_fws_macdesc_table {
452 struct brcmf_fws_mac_descriptor nodes[BRCMF_FWS_MAC_DESC_TABLE_SIZE];
453 struct brcmf_fws_mac_descriptor iface[BRCMF_MAX_IFS];
454 struct brcmf_fws_mac_descriptor other;
455};
456
349e7104
AS		 457struct brcmf_fws_info {
458 struct brcmf_pub *drvr;
3f4f910f
HM		 459 spinlock_t spinlock;
460 ulong flags;
349e7104 461 struct brcmf_fws_stats stats;
6971280a 462 struct brcmf_fws_hanger hanger;
c7f34a69 463 enum brcmf_fws_fcmode fcmode;
0a4254be 464 bool fw_signals;
7d747037 465 bool bcmc_credit_check;
84bcc0c3
AS		 466 struct brcmf_fws_macdesc_table desc;
467 struct workqueue_struct *fws_wq;
468 struct work_struct fws_dequeue_work;
469 u32 fifo_enqpkt[BRCMF_FWS_FIFO_COUNT];
3edc1cff 470 int fifo_credit[BRCMF_FWS_FIFO_COUNT];
1aac1e91 471 int credits_borrowed[BRCMF_FWS_FIFO_AC_VO + 1];
84bcc0c3
AS		 472 int deq_node_pos[BRCMF_FWS_FIFO_COUNT];
473 u32 fifo_credit_map;
474 u32 fifo_delay_map;
1aac1e91 475 unsigned long borrow_defer_timestamp;
df50f756 476 bool bus_flow_blocked;
0d24b0ea 477 bool creditmap_received;
1e86d696 478 u8 mode;
9cd18359 479 bool avoid_queueing;
3edc1cff
AS		 480};
481
482/*
483 * brcmf_fws_prio2fifo - mapping from 802.1d priority to firmware fifo index.
484 */
485static const int brcmf_fws_prio2fifo[] = {
486 BRCMF_FWS_FIFO_AC_BE,
487 BRCMF_FWS_FIFO_AC_BK,
488 BRCMF_FWS_FIFO_AC_BK,
489 BRCMF_FWS_FIFO_AC_BE,
490 BRCMF_FWS_FIFO_AC_VI,
491 BRCMF_FWS_FIFO_AC_VI,
492 BRCMF_FWS_FIFO_AC_VO,
493 BRCMF_FWS_FIFO_AC_VO
349e7104
AS		 494};
495
c7f34a69
AS		 496static int fcmode;
497module_param(fcmode, int, S_IRUSR);
498MODULE_PARM_DESC(fcmode, "mode of firmware signalled flow control");
499
bb8c8063
AS		 500#define BRCMF_FWS_TLV_DEF(name, id, len) \
501 case BRCMF_FWS_TYPE_ ## name: \
502 return len;
503
3edc1cff
AS		 504/**
505 * brcmf_fws_get_tlv_len() - returns defined length for given tlv id.
506 *
507 * @fws: firmware-signalling information.
508 * @id: identifier of the TLV.
509 *
510 * Return: the specified length for the given TLV; Otherwise -EINVAL.
511 */
bb8c8063
AS		 512static int brcmf_fws_get_tlv_len(struct brcmf_fws_info *fws,
513 enum brcmf_fws_tlv_type id)
514{
515 switch (id) {
516 BRCMF_FWS_TLV_DEFLIST
517 default:
bb8c8063
AS		 518 fws->stats.tlv_invalid_type++;
519 break;
520 }
521 return -EINVAL;
522}
523#undef BRCMF_FWS_TLV_DEF
524
3f4f910f
HM		 525static void brcmf_fws_lock(struct brcmf_fws_info *fws)
526 __acquires(&fws->spinlock)
527{
528 spin_lock_irqsave(&fws->spinlock, fws->flags);
529}
530
531static void brcmf_fws_unlock(struct brcmf_fws_info *fws)
532 __releases(&fws->spinlock)
533{
534 spin_unlock_irqrestore(&fws->spinlock, fws->flags);
535}
536
3edc1cff
AS		 537static bool brcmf_fws_ifidx_match(struct sk_buff *skb, void *arg)
538{
539 u32 ifidx = brcmf_skb_if_flags_get_field(skb, INDEX);
540 return ifidx == *(int *)arg;
541}
542
543static void brcmf_fws_psq_flush(struct brcmf_fws_info *fws, struct pktq *q,
544 int ifidx)
545{
546 bool (*matchfn)(struct sk_buff *, void *) = NULL;
547 struct sk_buff *skb;
548 int prec;
549
550 if (ifidx != -1)
551 matchfn = brcmf_fws_ifidx_match;
552 for (prec = 0; prec < q->num_prec; prec++) {
553 skb = brcmu_pktq_pdeq_match(q, prec, matchfn, &ifidx);
554 while (skb) {
84bcc0c3 555 brcmu_pkt_buf_free_skb(skb);
3edc1cff
AS		 556 skb = brcmu_pktq_pdeq_match(q, prec, matchfn, &ifidx);
557 }
558 }
559}
560
6971280a
AS		 561static void brcmf_fws_hanger_init(struct brcmf_fws_hanger *hanger)
562{
563 int i;
564
6971280a
AS		 565 memset(hanger, 0, sizeof(*hanger));
566 for (i = 0; i < ARRAY_SIZE(hanger->items); i++)
3edc1cff 567 hanger->items[i].state = BRCMF_FWS_HANGER_ITEM_STATE_FREE;
6971280a
AS		 568}
569
3edc1cff 570static u32 brcmf_fws_hanger_get_free_slot(struct brcmf_fws_hanger *h)
6971280a
AS		 571{
572 u32 i;
573
6971280a
AS		 574 i = (h->slot_pos + 1) % BRCMF_FWS_HANGER_MAXITEMS;
575
576 while (i != h->slot_pos) {
3edc1cff 577 if (h->items[i].state == BRCMF_FWS_HANGER_ITEM_STATE_FREE) {
6971280a 578 h->slot_pos = i;
84bcc0c3 579 goto done;
6971280a
AS		 580 }
581 i++;
582 if (i == BRCMF_FWS_HANGER_MAXITEMS)
583 i = 0;
584 }
585 brcmf_err("all slots occupied\n");
586 h->failed_slotfind++;
84bcc0c3
AS		 587 i = BRCMF_FWS_HANGER_MAXITEMS;
588done:
84bcc0c3 589 return i;
6971280a
AS		 590}
591
3edc1cff 592static int brcmf_fws_hanger_pushpkt(struct brcmf_fws_hanger *h,
be4910ad 593 struct sk_buff *pkt, u32 slot_id)
6971280a 594{
6971280a
AS		 595 if (slot_id >= BRCMF_FWS_HANGER_MAXITEMS)
596 return -ENOENT;
597
598 if (h->items[slot_id].state != BRCMF_FWS_HANGER_ITEM_STATE_FREE) {
599 brcmf_err("slot is not free\n");
600 h->failed_to_push++;
601 return -EINVAL;
602 }
603
604 h->items[slot_id].state = BRCMF_FWS_HANGER_ITEM_STATE_INUSE;
605 h->items[slot_id].pkt = pkt;
6971280a
AS		 606 h->pushed++;
607 return 0;
608}
609
3edc1cff 610static int brcmf_fws_hanger_poppkt(struct brcmf_fws_hanger *h,
6971280a
AS		 611 u32 slot_id, struct sk_buff **pktout,
612 bool remove_item)
613{
6971280a
AS		 614 if (slot_id >= BRCMF_FWS_HANGER_MAXITEMS)
615 return -ENOENT;
616
617 if (h->items[slot_id].state == BRCMF_FWS_HANGER_ITEM_STATE_FREE) {
618 brcmf_err("entry not in use\n");
619 h->failed_to_pop++;
620 return -EINVAL;
621 }
622
623 *pktout = h->items[slot_id].pkt;
624 if (remove_item) {
625 h->items[slot_id].state = BRCMF_FWS_HANGER_ITEM_STATE_FREE;
626 h->items[slot_id].pkt = NULL;
6971280a
AS		 627 h->popped++;
628 }
629 return 0;
630}
631
84bcc0c3 632static int brcmf_fws_hanger_mark_suppressed(struct brcmf_fws_hanger *h,
be4910ad 633 u32 slot_id)
6971280a 634{
6971280a
AS		 635 if (slot_id >= BRCMF_FWS_HANGER_MAXITEMS)
636 return -ENOENT;
637
5631becb 638 if (h->items[slot_id].state == BRCMF_FWS_HANGER_ITEM_STATE_FREE) {
6971280a
AS		 639 brcmf_err("entry not in use\n");
640 return -EINVAL;
641 }
642
3edc1cff 643 h->items[slot_id].state = BRCMF_FWS_HANGER_ITEM_STATE_INUSE_SUPPRESSED;
6971280a
AS		 644 return 0;
645}
646
84bcc0c3 647static void brcmf_fws_hanger_cleanup(struct brcmf_fws_info *fws,
6971280a
AS		 648 bool (*fn)(struct sk_buff *, void *),
649 int ifidx)
650{
84bcc0c3 651 struct brcmf_fws_hanger *h = &fws->hanger;
6971280a
AS		 652 struct sk_buff *skb;
653 int i;
654 enum brcmf_fws_hanger_item_state s;
655
6971280a
AS		 656 for (i = 0; i < ARRAY_SIZE(h->items); i++) {
657 s = h->items[i].state;
658 if (s == BRCMF_FWS_HANGER_ITEM_STATE_INUSE ||
659 s == BRCMF_FWS_HANGER_ITEM_STATE_INUSE_SUPPRESSED) {
660 skb = h->items[i].pkt;
661 if (fn == NULL || fn(skb, &ifidx)) {
662 /* suppress packets freed from psq */
663 if (s == BRCMF_FWS_HANGER_ITEM_STATE_INUSE)
664 brcmu_pkt_buf_free_skb(skb);
665 h->items[i].state =
666 BRCMF_FWS_HANGER_ITEM_STATE_FREE;
667 }
668 }
669 }
670}
671
8071fd61
AS		 672static void brcmf_fws_macdesc_set_name(struct brcmf_fws_info *fws,
673 struct brcmf_fws_mac_descriptor *desc)
674{
675 if (desc == &fws->desc.other)
676 strlcpy(desc->name, "MAC-OTHER", sizeof(desc->name));
677 else if (desc->mac_handle)
678 scnprintf(desc->name, sizeof(desc->name), "MAC-%d:%d",
679 desc->mac_handle, desc->interface_id);
680 else
681 scnprintf(desc->name, sizeof(desc->name), "MACIF:%d",
682 desc->interface_id);
683}
684
1ab083a3
AS		 685static void brcmf_fws_macdesc_init(struct brcmf_fws_mac_descriptor *desc,
686 u8 *addr, u8 ifidx)
ce814c1b 687{
84bcc0c3
AS		 688 brcmf_dbg(TRACE,
689 "enter: desc %p ea=%pM, ifidx=%u\n", desc, addr, ifidx);
ce814c1b
AS		 690 desc->occupied = 1;
691 desc->state = BRCMF_FWS_STATE_OPEN;
692 desc->requested_credit = 0;
fa587d4b 693 desc->requested_packet = 0;
ce814c1b
AS		 694 /* depending on use may need ifp->bssidx instead */
695 desc->interface_id = ifidx;
696 desc->ac_bitmap = 0xff; /* update this when handling APSD */
84bcc0c3
AS		 697 if (addr)
698 memcpy(&desc->ea[0], addr, ETH_ALEN);
ce814c1b
AS		 699}
700
701static
1ab083a3 702void brcmf_fws_macdesc_deinit(struct brcmf_fws_mac_descriptor *desc)
ce814c1b
AS		 703{
704 brcmf_dbg(TRACE,
705 "enter: ea=%pM, ifidx=%u\n", desc->ea, desc->interface_id);
706 desc->occupied = 0;
707 desc->state = BRCMF_FWS_STATE_CLOSE;
708 desc->requested_credit = 0;
fa587d4b 709 desc->requested_packet = 0;
ce814c1b
AS		 710}
711
712static struct brcmf_fws_mac_descriptor *
1ab083a3 713brcmf_fws_macdesc_lookup(struct brcmf_fws_info *fws, u8 *ea)
ce814c1b
AS		 714{
715 struct brcmf_fws_mac_descriptor *entry;
716 int i;
717
ce814c1b
AS		 718 if (ea == NULL)
719 return ERR_PTR(-EINVAL);
720
84bcc0c3
AS		 721 entry = &fws->desc.nodes[0];
722 for (i = 0; i < ARRAY_SIZE(fws->desc.nodes); i++) {
ce814c1b
AS		 723 if (entry->occupied && !memcmp(entry->ea, ea, ETH_ALEN))
724 return entry;
725 entry++;
726 }
727
728 return ERR_PTR(-ENOENT);
729}
730
3edc1cff 731static struct brcmf_fws_mac_descriptor*
1ab083a3 732brcmf_fws_macdesc_find(struct brcmf_fws_info *fws, struct brcmf_if *ifp, u8 *da)
3edc1cff 733{
84bcc0c3 734 struct brcmf_fws_mac_descriptor *entry = &fws->desc.other;
3edc1cff 735 bool multicast;
3edc1cff 736
f97a7f06 737 multicast = is_multicast_ether_addr(da);
a7965fbb 738
5cd51c2b
HM		 739 /* Multicast destination, STA and P2P clients get the interface entry.
740 * STA/GC gets the Mac Entry for TDLS destinations, TDLS destinations
741 * have their own entry.
3edc1cff 742 */
5cd51c2b 743 if (multicast && ifp->fws_desc) {
3edc1cff 744 entry = ifp->fws_desc;
3edc1cff 745 goto done;
5cd51c2b 746 }
3edc1cff 747
1ab083a3 748 entry = brcmf_fws_macdesc_lookup(fws, da);
3edc1cff 749 if (IS_ERR(entry))
5cd51c2b 750 entry = ifp->fws_desc;
3edc1cff
AS		 751
752done:
3edc1cff
AS		 753 return entry;
754}
755
1ab083a3
AS		 756static bool brcmf_fws_macdesc_closed(struct brcmf_fws_info *fws,
757 struct brcmf_fws_mac_descriptor *entry,
758 int fifo)
84bcc0c3 759{
b75c1a30 760 struct brcmf_fws_mac_descriptor *if_entry;
9fc60224 761 bool closed;
84bcc0c3 762
b75c1a30
AS		 763 /* for unique destination entries the related interface
764 * may be closed.
765 */
766 if (entry->mac_handle) {
767 if_entry = &fws->desc.iface[entry->interface_id];
768 if (if_entry->state == BRCMF_FWS_STATE_CLOSE)
769 return true;
770 }
9fc60224
AS		 771 /* an entry is closed when the state is closed and
772 * the firmware did not request anything.
84bcc0c3 773 */
9fc60224
AS		 774 closed = entry->state == BRCMF_FWS_STATE_CLOSE &&
775 !entry->requested_credit && !entry->requested_packet;
84bcc0c3 776
9fc60224
AS		 777 /* Or firmware does not allow traffic for given fifo */
778 return closed || !(entry->ac_bitmap & BIT(fifo));
84bcc0c3
AS		 779}
780
1ab083a3
AS		 781static void brcmf_fws_macdesc_cleanup(struct brcmf_fws_info *fws,
782 struct brcmf_fws_mac_descriptor *entry,
783 int ifidx)
fba1400a 784{
3edc1cff 785 if (entry->occupied && (ifidx == -1 || ifidx == entry->interface_id)) {
3edc1cff 786 brcmf_fws_psq_flush(fws, &entry->psq, ifidx);
fba1400a
AS		 787 entry->occupied = !!(entry->psq.len);
788 }
789}
790
e2432b67
AS		 791static void brcmf_fws_bus_txq_cleanup(struct brcmf_fws_info *fws,
792 bool (*fn)(struct sk_buff *, void *),
793 int ifidx)
794{
795 struct brcmf_fws_hanger_item *hi;
796 struct pktq *txq;
797 struct sk_buff *skb;
798 int prec;
799 u32 hslot;
800
e2432b67
AS		 801 txq = brcmf_bus_gettxq(fws->drvr->bus_if);
802 if (IS_ERR(txq)) {
803 brcmf_dbg(TRACE, "no txq to clean up\n");
804 return;
805 }
806
807 for (prec = 0; prec < txq->num_prec; prec++) {
808 skb = brcmu_pktq_pdeq_match(txq, prec, fn, &ifidx);
809 while (skb) {
810 hslot = brcmf_skb_htod_tag_get_field(skb, HSLOT);
811 hi = &fws->hanger.items[hslot];
812 WARN_ON(skb != hi->pkt);
813 hi->state = BRCMF_FWS_HANGER_ITEM_STATE_FREE;
814 brcmu_pkt_buf_free_skb(skb);
815 skb = brcmu_pktq_pdeq_match(txq, prec, fn, &ifidx);
816 }
817 }
818}
819
fba1400a
AS		 820static void brcmf_fws_cleanup(struct brcmf_fws_info *fws, int ifidx)
821{
822 int i;
823 struct brcmf_fws_mac_descriptor *table;
a3e993c7 824 bool (*matchfn)(struct sk_buff *, void *) = NULL;
fba1400a 825
fba1400a
AS		 826 if (fws == NULL)
827 return;
828
a3e993c7
AS		 829 if (ifidx != -1)
830 matchfn = brcmf_fws_ifidx_match;
831
fba1400a 832 /* cleanup individual nodes */
84bcc0c3
AS		 833 table = &fws->desc.nodes[0];
834 for (i = 0; i < ARRAY_SIZE(fws->desc.nodes); i++)
1ab083a3 835 brcmf_fws_macdesc_cleanup(fws, &table[i], ifidx);
fba1400a 836
1ab083a3 837 brcmf_fws_macdesc_cleanup(fws, &fws->desc.other, ifidx);
e2432b67 838 brcmf_fws_bus_txq_cleanup(fws, matchfn, ifidx);
84bcc0c3
AS		 839 brcmf_fws_hanger_cleanup(fws, matchfn, ifidx);
840}
841
7b8a466e 842static u8 brcmf_fws_hdrpush(struct brcmf_fws_info *fws, struct sk_buff *skb)
84bcc0c3 843{
c7773fc1
AS		 844 struct brcmf_fws_mac_descriptor *entry = brcmf_skbcb(skb)->mac;
845 u8 *wlh;
846 u16 data_offset = 0;
847 u8 fillers;
848 __le32 pkttag = cpu_to_le32(brcmf_skbcb(skb)->htod);
1e86d696 849 __le16 pktseq = cpu_to_le16(brcmf_skbcb(skb)->htod_seq);
c7773fc1 850
1e86d696 851 brcmf_dbg(TRACE, "enter: %s, idx=%d hslot=%d htod %X seq %X\n",
80898a11 852 entry->name, brcmf_skb_if_flags_get_field(skb, INDEX),
1e86d696
HM		 853 (le32_to_cpu(pkttag) >> 8) & 0xffff,
854 brcmf_skbcb(skb)->htod, brcmf_skbcb(skb)->htod_seq);
c7773fc1
AS		 855 if (entry->send_tim_signal)
856 data_offset += 2 + BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP_LEN;
1e86d696
HM		 857 if (BRCMF_FWS_MODE_GET_REUSESEQ(fws->mode))
858 data_offset += BRCMF_FWS_TYPE_SEQ_LEN;
c7773fc1
AS		 859 /* +2 is for Type[1] and Len[1] in TLV, plus TIM signal */
860 data_offset += 2 + BRCMF_FWS_TYPE_PKTTAG_LEN;
861 fillers = round_up(data_offset, 4) - data_offset;
862 data_offset += fillers;
863
864 skb_push(skb, data_offset);
865 wlh = skb->data;
866
867 wlh[0] = BRCMF_FWS_TYPE_PKTTAG;
868 wlh[1] = BRCMF_FWS_TYPE_PKTTAG_LEN;
869 memcpy(&wlh[2], &pkttag, sizeof(pkttag));
1e86d696
HM		 870 if (BRCMF_FWS_MODE_GET_REUSESEQ(fws->mode)) {
871 wlh[1] += BRCMF_FWS_TYPE_SEQ_LEN;
872 memcpy(&wlh[2 + BRCMF_FWS_TYPE_PKTTAG_LEN], &pktseq,
873 sizeof(pktseq));
874 }
875 wlh += wlh[1] + 2;
c7773fc1
AS		 876
877 if (entry->send_tim_signal) {
878 entry->send_tim_signal = 0;
879 wlh[0] = BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP;
880 wlh[1] = BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP_LEN;
881 wlh[2] = entry->mac_handle;
882 wlh[3] = entry->traffic_pending_bmp;
80898a11
AS		 883 brcmf_dbg(TRACE, "adding TIM info: handle %d bmp 0x%X\n",
884 entry->mac_handle, entry->traffic_pending_bmp);
c7773fc1
AS		 885 wlh += BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP_LEN + 2;
886 entry->traffic_lastreported_bmp = entry->traffic_pending_bmp;
84bcc0c3 887 }
c7773fc1
AS		 888 if (fillers)
889 memset(wlh, BRCMF_FWS_TYPE_FILLER, fillers);
890
7b8a466e 891 return (u8)(data_offset >> 2);
c7773fc1
AS		 892}
893
894static bool brcmf_fws_tim_update(struct brcmf_fws_info *fws,
895 struct brcmf_fws_mac_descriptor *entry,
4e89dfca 896 int fifo, bool send_immediately)
c7773fc1
AS		 897{
898 struct sk_buff *skb;
c7773fc1
AS		 899 struct brcmf_skbuff_cb *skcb;
900 s32 err;
901 u32 len;
7b8a466e
HM		 902 u8 data_offset;
903 int ifidx;
c7773fc1
AS		 904
905 /* check delayedQ and suppressQ in one call using bitmap */
4e89dfca
AS		 906 if (brcmu_pktq_mlen(&entry->psq, 3 << (fifo * 2)) == 0)
907 entry->traffic_pending_bmp &= ~NBITVAL(fifo);
c7773fc1 908 else
4e89dfca 909 entry->traffic_pending_bmp |= NBITVAL(fifo);
c7773fc1
AS		 910
911 entry->send_tim_signal = false;
84bcc0c3
AS		 912 if (entry->traffic_lastreported_bmp != entry->traffic_pending_bmp)
913 entry->send_tim_signal = true;
c7773fc1
AS		 914 if (send_immediately && entry->send_tim_signal &&
915 entry->state == BRCMF_FWS_STATE_CLOSE) {
916 /* create a dummy packet and sent that. The traffic */
917 /* bitmap info will automatically be attached to that packet */
918 len = BRCMF_FWS_TYPE_PKTTAG_LEN + 2 +
1e86d696 919 BRCMF_FWS_TYPE_SEQ_LEN +
c7773fc1
AS		 920 BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP_LEN + 2 +
921 4 + fws->drvr->hdrlen;
922 skb = brcmu_pkt_buf_get_skb(len);
923 if (skb == NULL)
924 return false;
925 skb_pull(skb, len);
926 skcb = brcmf_skbcb(skb);
927 skcb->mac = entry;
928 skcb->state = BRCMF_FWS_SKBSTATE_TIM;
1e86d696
HM		 929 skcb->htod = 0;
930 skcb->htod_seq = 0;
7b8a466e
HM		 931 data_offset = brcmf_fws_hdrpush(fws, skb);
932 ifidx = brcmf_skb_if_flags_get_field(skb, INDEX);
933 brcmf_fws_unlock(fws);
934 err = brcmf_proto_txdata(fws->drvr, ifidx, data_offset, skb);
935 brcmf_fws_lock(fws);
c7773fc1
AS		 936 if (err)
937 brcmu_pkt_buf_free_skb(skb);
938 return true;
939 }
940 return false;
84bcc0c3
AS		 941}
942
943static void
944brcmf_fws_flow_control_check(struct brcmf_fws_info *fws, struct pktq *pq,
945 u8 if_id)
946{
402e3ba2 947 struct brcmf_if *ifp = fws->drvr->iflist[!if_id ? 0 : if_id + 1];
84bcc0c3 948
84bcc0c3
AS		 949 if (WARN_ON(!ifp))
950 return;
951
952 if ((ifp->netif_stop & BRCMF_NETIF_STOP_REASON_FWS_FC) &&
953 pq->len <= BRCMF_FWS_FLOWCONTROL_LOWATER)
954 brcmf_txflowblock_if(ifp,
955 BRCMF_NETIF_STOP_REASON_FWS_FC, false);
956 if (!(ifp->netif_stop & BRCMF_NETIF_STOP_REASON_FWS_FC) &&
5631becb
AS		 957 pq->len >= BRCMF_FWS_FLOWCONTROL_HIWATER) {
958 fws->stats.fws_flow_block++;
84bcc0c3 959 brcmf_txflowblock_if(ifp, BRCMF_NETIF_STOP_REASON_FWS_FC, true);
5631becb 960 }
84bcc0c3 961 return;
fba1400a
AS		 962}
963
349e7104
AS		 964static int brcmf_fws_rssi_indicate(struct brcmf_fws_info *fws, s8 rssi)
965{
966 brcmf_dbg(CTL, "rssi %d\n", rssi);
967 return 0;
968}
969
ce814c1b
AS		 970static
971int brcmf_fws_macdesc_indicate(struct brcmf_fws_info *fws, u8 type, u8 *data)
972{
973 struct brcmf_fws_mac_descriptor *entry, *existing;
974 u8 mac_handle;
975 u8 ifidx;
976 u8 *addr;
977
978 mac_handle = *data++;
979 ifidx = *data++;
980 addr = data;
981
84bcc0c3 982 entry = &fws->desc.nodes[mac_handle & 0x1F];
ce814c1b 983 if (type == BRCMF_FWS_TYPE_MACDESC_DEL) {
9a83f1ec 984 if (entry->occupied) {
8071fd61
AS		 985 brcmf_dbg(TRACE, "deleting %s mac %pM\n",
986 entry->name, addr);
3f4f910f 987 brcmf_fws_lock(fws);
1ab083a3
AS		 988 brcmf_fws_macdesc_cleanup(fws, entry, -1);
989 brcmf_fws_macdesc_deinit(entry);
3f4f910f 990 brcmf_fws_unlock(fws);
9a83f1ec 991 } else
ce814c1b 992 fws->stats.mac_update_failed++;
ce814c1b
AS		 993 return 0;
994 }
995
1ab083a3 996 existing = brcmf_fws_macdesc_lookup(fws, addr);
ce814c1b
AS		 997 if (IS_ERR(existing)) {
998 if (!entry->occupied) {
3f4f910f 999 brcmf_fws_lock(fws);
ce814c1b 1000 entry->mac_handle = mac_handle;
1ab083a3 1001 brcmf_fws_macdesc_init(entry, addr, ifidx);
8071fd61 1002 brcmf_fws_macdesc_set_name(fws, entry);
ce814c1b
AS		 1003 brcmu_pktq_init(&entry->psq, BRCMF_FWS_PSQ_PREC_COUNT,
1004 BRCMF_FWS_PSQ_LEN);
3f4f910f 1005 brcmf_fws_unlock(fws);
8071fd61 1006 brcmf_dbg(TRACE, "add %s mac %pM\n", entry->name, addr);
ce814c1b
AS		 1007 } else {
1008 fws->stats.mac_update_failed++;
1009 }
1010 } else {
1011 if (entry != existing) {
8071fd61 1012 brcmf_dbg(TRACE, "copy mac %s\n", existing->name);
3f4f910f 1013 brcmf_fws_lock(fws);
ce814c1b
AS		 1014 memcpy(entry, existing,
1015 offsetof(struct brcmf_fws_mac_descriptor, psq));
1016 entry->mac_handle = mac_handle;
1ab083a3 1017 brcmf_fws_macdesc_deinit(existing);
8071fd61 1018 brcmf_fws_macdesc_set_name(fws, entry);
3f4f910f 1019 brcmf_fws_unlock(fws);
8071fd61
AS		 1020 brcmf_dbg(TRACE, "relocate %s mac %pM\n", entry->name,
1021 addr);
ce814c1b
AS		 1022 } else {
1023 brcmf_dbg(TRACE, "use existing\n");
1024 WARN_ON(entry->mac_handle != mac_handle);
1025 /* TODO: what should we do here: continue, reinit, .. */
1026 }
1027 }
1028 return 0;
1029}
1030
33753d47
AS		 1031static int brcmf_fws_macdesc_state_indicate(struct brcmf_fws_info *fws,
1032 u8 type, u8 *data)
1033{
1034 struct brcmf_fws_mac_descriptor *entry;
1035 u8 mac_handle;
c6a681ab 1036 int ret;
33753d47
AS		 1037
1038 mac_handle = data[0];
1039 entry = &fws->desc.nodes[mac_handle & 0x1F];
1040 if (!entry->occupied) {
1041 fws->stats.mac_ps_update_failed++;
1042 return -ESRCH;
1043 }
3f4f910f 1044 brcmf_fws_lock(fws);
c7773fc1 1045 /* a state update should wipe old credits */
33753d47 1046 entry->requested_credit = 0;
c7773fc1 1047 entry->requested_packet = 0;
33753d47
AS		 1048 if (type == BRCMF_FWS_TYPE_MAC_OPEN) {
1049 entry->state = BRCMF_FWS_STATE_OPEN;
c6a681ab 1050 ret = BRCMF_FWS_RET_OK_SCHEDULE;
33753d47
AS		 1051 } else {
1052 entry->state = BRCMF_FWS_STATE_CLOSE;
c7773fc1
AS		 1053 brcmf_fws_tim_update(fws, entry, BRCMF_FWS_FIFO_AC_BK, false);
1054 brcmf_fws_tim_update(fws, entry, BRCMF_FWS_FIFO_AC_BE, false);
1055 brcmf_fws_tim_update(fws, entry, BRCMF_FWS_FIFO_AC_VI, false);
1056 brcmf_fws_tim_update(fws, entry, BRCMF_FWS_FIFO_AC_VO, true);
c6a681ab 1057 ret = BRCMF_FWS_RET_OK_NOSCHEDULE;
33753d47 1058 }
3f4f910f 1059 brcmf_fws_unlock(fws);
c6a681ab 1060 return ret;
33753d47
AS		 1061}
1062
1063static int brcmf_fws_interface_state_indicate(struct brcmf_fws_info *fws,
1064 u8 type, u8 *data)
1065{
1066 struct brcmf_fws_mac_descriptor *entry;
1067 u8 ifidx;
1068 int ret;
1069
1070 ifidx = data[0];
1071
33753d47
AS		 1072 if (ifidx >= BRCMF_MAX_IFS) {
1073 ret = -ERANGE;
1074 goto fail;
1075 }
1076
1077 entry = &fws->desc.iface[ifidx];
1078 if (!entry->occupied) {
1079 ret = -ESRCH;
1080 goto fail;
1081 }
1082
8071fd61
AS		 1083 brcmf_dbg(TRACE, "%s (%d): %s\n", brcmf_fws_get_tlv_name(type), type,
1084 entry->name);
3f4f910f 1085 brcmf_fws_lock(fws);
33753d47
AS		 1086 switch (type) {
1087 case BRCMF_FWS_TYPE_INTERFACE_OPEN:
1088 entry->state = BRCMF_FWS_STATE_OPEN;
c6a681ab
AS		 1089 ret = BRCMF_FWS_RET_OK_SCHEDULE;
1090 break;
33753d47
AS		 1091 case BRCMF_FWS_TYPE_INTERFACE_CLOSE:
1092 entry->state = BRCMF_FWS_STATE_CLOSE;
c6a681ab
AS		 1093 ret = BRCMF_FWS_RET_OK_NOSCHEDULE;
1094 break;
33753d47
AS		 1095 default:
1096 ret = -EINVAL;
3f4f910f 1097 brcmf_fws_unlock(fws);
c6a681ab 1098 goto fail;
33753d47 1099 }
3f4f910f 1100 brcmf_fws_unlock(fws);
c6a681ab
AS		 1101 return ret;
1102
33753d47
AS		 1103fail:
1104 fws->stats.if_update_failed++;
1105 return ret;
1106}
1107
5f38b683
AS		 1108static int brcmf_fws_request_indicate(struct brcmf_fws_info *fws, u8 type,
1109 u8 *data)
1110{
1111 struct brcmf_fws_mac_descriptor *entry;
1112
1113 entry = &fws->desc.nodes[data[1] & 0x1F];
1114 if (!entry->occupied) {
1115 if (type == BRCMF_FWS_TYPE_MAC_REQUEST_CREDIT)
1116 fws->stats.credit_request_failed++;
1117 else
1118 fws->stats.packet_request_failed++;
1119 return -ESRCH;
1120 }
1121
8071fd61
AS		 1122 brcmf_dbg(TRACE, "%s (%d): %s cnt %d bmp %d\n",
1123 brcmf_fws_get_tlv_name(type), type, entry->name,
1124 data[0], data[2]);
3f4f910f 1125 brcmf_fws_lock(fws);
5f38b683
AS		 1126 if (type == BRCMF_FWS_TYPE_MAC_REQUEST_CREDIT)
1127 entry->requested_credit = data[0];
1128 else
1129 entry->requested_packet = data[0];
1130
1131 entry->ac_bitmap = data[2];
3f4f910f 1132 brcmf_fws_unlock(fws);
a5e9d805 1133 return BRCMF_FWS_RET_OK_SCHEDULE;
5f38b683
AS		 1134}
1135
fa587d4b
HM		 1136static void
1137brcmf_fws_macdesc_use_req_credit(struct brcmf_fws_mac_descriptor *entry,
1138 struct sk_buff *skb)
289ec1c7 1139{
fa587d4b
HM		 1140 if (entry->requested_credit > 0) {
1141 entry->requested_credit--;
1142 brcmf_skb_if_flags_set_field(skb, REQUESTED, 1);
1143 brcmf_skb_if_flags_set_field(skb, REQ_CREDIT, 1);
1144 if (entry->state != BRCMF_FWS_STATE_CLOSE)
1145 brcmf_err("requested credit set while mac not closed!\n");
1146 } else if (entry->requested_packet > 0) {
1147 entry->requested_packet--;
1148 brcmf_skb_if_flags_set_field(skb, REQUESTED, 1);
1149 brcmf_skb_if_flags_set_field(skb, REQ_CREDIT, 0);
1150 if (entry->state != BRCMF_FWS_STATE_CLOSE)
1151 brcmf_err("requested packet set while mac not closed!\n");
289ec1c7 1152 } else {
fa587d4b
HM		 1153 brcmf_skb_if_flags_set_field(skb, REQUESTED, 0);
1154 brcmf_skb_if_flags_set_field(skb, REQ_CREDIT, 0);
289ec1c7 1155 }
fa587d4b
HM		 1156}
1157
1158static void brcmf_fws_macdesc_return_req_credit(struct sk_buff *skb)
1159{
1160 struct brcmf_fws_mac_descriptor *entry = brcmf_skbcb(skb)->mac;
1161
1162 if ((brcmf_skb_if_flags_get_field(skb, REQ_CREDIT)) &&
1163 (entry->state == BRCMF_FWS_STATE_CLOSE))
1164 entry->requested_credit++;
289ec1c7
AS		 1165}
1166
84bcc0c3
AS		 1167static void brcmf_fws_return_credits(struct brcmf_fws_info *fws,
1168 u8 fifo, u8 credits)
1169{
1aac1e91
AS		 1170 int lender_ac;
1171 int *borrowed;
1172 int *fifo_credit;
1173
84bcc0c3
AS		 1174 if (!credits)
1175 return;
1176
afc3bbfc
HM		 1177 fws->fifo_credit_map |= 1 << fifo;
1178
1aac1e91
AS		 1179 if ((fifo == BRCMF_FWS_FIFO_AC_BE) &&
1180 (fws->credits_borrowed[0])) {
1181 for (lender_ac = BRCMF_FWS_FIFO_AC_VO; lender_ac >= 0;
1182 lender_ac--) {
1183 borrowed = &fws->credits_borrowed[lender_ac];
1184 if (*borrowed) {
1185 fws->fifo_credit_map |= (1 << lender_ac);
1186 fifo_credit = &fws->fifo_credit[lender_ac];
1187 if (*borrowed >= credits) {
1188 *borrowed -= credits;
1189 *fifo_credit += credits;
1190 return;
1191 } else {
1192 credits -= *borrowed;
1193 *fifo_credit += *borrowed;
1194 *borrowed = 0;
1195 }
1196 }
1197 }
1198 }
1199
84bcc0c3
AS		 1200 fws->fifo_credit[fifo] += credits;
1201}
1202
1203static void brcmf_fws_schedule_deq(struct brcmf_fws_info *fws)
1204{
1205 /* only schedule dequeue when there are credits for delayed traffic */
0a4254be
HM		 1206 if ((fws->fifo_credit_map & fws->fifo_delay_map) ||
1207 (!brcmf_fws_fc_active(fws) && fws->fifo_delay_map))
84bcc0c3
AS		 1208 queue_work(fws->fws_wq, &fws->fws_dequeue_work);
1209}
1210
84bcc0c3
AS		 1211static int brcmf_fws_enq(struct brcmf_fws_info *fws,
1212 enum brcmf_fws_skb_state state, int fifo,
1213 struct sk_buff *p)
1214{
1215 int prec = 2 * fifo;
1216 u32 *qfull_stat = &fws->stats.delayq_full_error;
84bcc0c3 1217 struct brcmf_fws_mac_descriptor *entry;
1e86d696
HM		 1218 struct pktq *pq;
1219 struct sk_buff_head *queue;
1220 struct sk_buff *p_head;
1221 struct sk_buff *p_tail;
1222 u32 fr_new;
1223 u32 fr_compare;
84bcc0c3
AS		 1224
1225 entry = brcmf_skbcb(p)->mac;
1226 if (entry == NULL) {
1227 brcmf_err("no mac descriptor found for skb %p\n", p);
1228 return -ENOENT;
1229 }
1230
8071fd61 1231 brcmf_dbg(DATA, "enter: fifo %d skb %p\n", fifo, p);
84bcc0c3
AS		 1232 if (state == BRCMF_FWS_SKBSTATE_SUPPRESSED) {
1233 prec += 1;
1234 qfull_stat = &fws->stats.supprq_full_error;
84bcc0c3 1235
1e86d696
HM		 1236 /* Fix out of order delivery of frames. Dont assume frame */
1237 /* can be inserted at the end, but look for correct position */
1238 pq = &entry->psq;
1239 if (pktq_full(pq) || pktq_pfull(pq, prec)) {
1240 *qfull_stat += 1;
1241 return -ENFILE;
1242 }
1243 queue = &pq->q[prec].skblist;
1244
1245 p_head = skb_peek(queue);
1246 p_tail = skb_peek_tail(queue);
1247 fr_new = brcmf_skb_htod_tag_get_field(p, FREERUN);
1248
1249 while (p_head != p_tail) {
1250 fr_compare = brcmf_skb_htod_tag_get_field(p_tail,
1251 FREERUN);
1252 /* be sure to handle wrap of 256 */
1253 if (((fr_new > fr_compare) &&
1254 ((fr_new - fr_compare) < 128)) ||
1255 ((fr_new < fr_compare) &&
1256 ((fr_compare - fr_new) > 128)))
1257 break;
1258 p_tail = skb_queue_prev(queue, p_tail);
1259 }
1260 /* Position found. Determine what to do */
1261 if (p_tail == NULL) {
1262 /* empty list */
1263 __skb_queue_tail(queue, p);
1264 } else {
1265 fr_compare = brcmf_skb_htod_tag_get_field(p_tail,
1266 FREERUN);
1267 if (((fr_new > fr_compare) &&
1268 ((fr_new - fr_compare) < 128)) ||
1269 ((fr_new < fr_compare) &&
1270 ((fr_compare - fr_new) > 128))) {
1271 /* After tail */
1272 __skb_queue_after(queue, p_tail, p);
1273 } else {
1274 /* Before tail */
1275 __skb_insert(p, p_tail->prev, p_tail, queue);
1276 }
1277 }
1278
1279 /* Complete the counters and statistics */
1280 pq->len++;
1281 if (pq->hi_prec < prec)
1282 pq->hi_prec = (u8) prec;
1283 } else if (brcmu_pktq_penq(&entry->psq, prec, p) == NULL) {
84bcc0c3
AS		 1284 *qfull_stat += 1;
1285 return -ENFILE;
1286 }
1287
1288 /* increment total enqueued packet count */
1289 fws->fifo_delay_map |= 1 << fifo;
1290 fws->fifo_enqpkt[fifo]++;
1291
1292 /* update the sk_buff state */
1293 brcmf_skbcb(p)->state = state;
84bcc0c3
AS		 1294
1295 /*
1296 * A packet has been pushed so update traffic
1297 * availability bitmap, if applicable
1298 */
c7773fc1 1299 brcmf_fws_tim_update(fws, entry, fifo, true);
84bcc0c3
AS		 1300 brcmf_fws_flow_control_check(fws, &entry->psq,
1301 brcmf_skb_if_flags_get_field(p, INDEX));
1302 return 0;
1303}
1304
1305static struct sk_buff *brcmf_fws_deq(struct brcmf_fws_info *fws, int fifo)
1306{
1307 struct brcmf_fws_mac_descriptor *table;
1308 struct brcmf_fws_mac_descriptor *entry;
1309 struct sk_buff *p;
84bcc0c3
AS		 1310 int num_nodes;
1311 int node_pos;
1312 int prec_out;
07529d20 1313 int pmsk;
84bcc0c3
AS		 1314 int i;
1315
1316 table = (struct brcmf_fws_mac_descriptor *)&fws->desc;
1317 num_nodes = sizeof(fws->desc) / sizeof(struct brcmf_fws_mac_descriptor);
1318 node_pos = fws->deq_node_pos[fifo];
1319
1320 for (i = 0; i < num_nodes; i++) {
1321 entry = &table[(node_pos + i) % num_nodes];
b75c1a30 1322 if (!entry->occupied ||
1ab083a3 1323 brcmf_fws_macdesc_closed(fws, entry, fifo))
84bcc0c3
AS		 1324 continue;
1325
1326 if (entry->suppressed)
1327 pmsk = 2;
07529d20
AS		 1328 else
1329 pmsk = 3;
84bcc0c3
AS		 1330 p = brcmu_pktq_mdeq(&entry->psq, pmsk << (fifo * 2), &prec_out);
1331 if (p == NULL) {
1332 if (entry->suppressed) {
8c5140f6
HM		 1333 if (entry->suppr_transit_count)
1334 continue;
84bcc0c3
AS		 1335 entry->suppressed = false;
1336 p = brcmu_pktq_mdeq(&entry->psq,
1337 1 << (fifo * 2), &prec_out);
1338 }
1339 }
1340 if (p == NULL)
1341 continue;
1342
fa587d4b 1343 brcmf_fws_macdesc_use_req_credit(entry, p);
84bcc0c3
AS		 1344
1345 /* move dequeue position to ensure fair round-robin */
1346 fws->deq_node_pos[fifo] = (node_pos + i + 1) % num_nodes;
1347 brcmf_fws_flow_control_check(fws, &entry->psq,
1348 brcmf_skb_if_flags_get_field(p,
1349 INDEX)
1350 );
1351 /*
1352 * A packet has been picked up, update traffic
1353 * availability bitmap, if applicable
1354 */
c7773fc1 1355 brcmf_fws_tim_update(fws, entry, fifo, false);
84bcc0c3
AS		 1356
1357 /*
1358 * decrement total enqueued fifo packets and
1359 * clear delay bitmap if done.
1360 */
1361 fws->fifo_enqpkt[fifo]--;
1362 if (fws->fifo_enqpkt[fifo] == 0)
1363 fws->fifo_delay_map &= ~(1 << fifo);
1364 goto done;
1365 }
1366 p = NULL;
1367done:
8071fd61 1368 brcmf_dbg(DATA, "exit: fifo %d skb %p\n", fifo, p);
84bcc0c3
AS		 1369 return p;
1370}
1371
1372static int brcmf_fws_txstatus_suppressed(struct brcmf_fws_info *fws, int fifo,
53e30ea4
HM		 1373 struct sk_buff *skb, u8 ifidx,
1374 u32 genbit, u16 seq)
84bcc0c3
AS		 1375{
1376 struct brcmf_fws_mac_descriptor *entry = brcmf_skbcb(skb)->mac;
1377 u32 hslot;
1378 int ret;
1379
1380 hslot = brcmf_skb_htod_tag_get_field(skb, HSLOT);
1381
1382 /* this packet was suppressed */
be4910ad 1383 if (!entry->suppressed) {
84bcc0c3 1384 entry->suppressed = true;
84bcc0c3 1385 entry->suppr_transit_count = entry->transit_count;
8c5140f6
HM		 1386 brcmf_dbg(DATA, "suppress %s: transit %d\n",
1387 entry->name, entry->transit_count);
84bcc0c3
AS		 1388 }
1389
1390 entry->generation = genbit;
1391
53e30ea4
HM		 1392 brcmf_skb_htod_tag_set_field(skb, GENERATION, genbit);
1393 brcmf_skbcb(skb)->htod_seq = seq;
1394 if (brcmf_skb_htod_seq_get_field(skb, FROMFW)) {
1395 brcmf_skb_htod_seq_set_field(skb, FROMDRV, 1);
1396 brcmf_skb_htod_seq_set_field(skb, FROMFW, 0);
1397 } else {
1398 brcmf_skb_htod_seq_set_field(skb, FROMDRV, 0);
4d5504ec 1399 }
53e30ea4 1400 ret = brcmf_fws_enq(fws, BRCMF_FWS_SKBSTATE_SUPPRESSED, fifo, skb);
4d5504ec 1401
84bcc0c3 1402 if (ret != 0) {
53e30ea4
HM		 1403 /* suppress q is full drop this packet */
1404 brcmf_fws_hanger_poppkt(&fws->hanger, hslot, &skb, true);
84bcc0c3 1405 } else {
53e30ea4 1406 /* Mark suppressed to avoid a double free during wlfc cleanup */
be4910ad 1407 brcmf_fws_hanger_mark_suppressed(&fws->hanger, hslot);
84bcc0c3
AS		 1408 }
1409
1410 return ret;
1411}
1412
3edc1cff 1413static int
8071fd61 1414brcmf_fws_txs_process(struct brcmf_fws_info *fws, u8 flags, u32 hslot,
1e86d696 1415 u32 genbit, u16 seq)
3edc1cff 1416{
84bcc0c3 1417 u32 fifo;
3edc1cff 1418 int ret;
84bcc0c3 1419 bool remove_from_hanger = true;
3edc1cff 1420 struct sk_buff *skb;
8071fd61 1421 struct brcmf_skbuff_cb *skcb;
3edc1cff 1422 struct brcmf_fws_mac_descriptor *entry = NULL;
53e30ea4 1423 u8 ifidx;
3edc1cff 1424
8071fd61 1425 brcmf_dbg(DATA, "flags %d\n", flags);
3edc1cff
AS		 1426
1427 if (flags == BRCMF_FWS_TXSTATUS_DISCARD)
1428 fws->stats.txs_discard++;
84bcc0c3
AS		 1429 else if (flags == BRCMF_FWS_TXSTATUS_CORE_SUPPRESS) {
1430 fws->stats.txs_supp_core++;
1431 remove_from_hanger = false;
1432 } else if (flags == BRCMF_FWS_TXSTATUS_FW_PS_SUPPRESS) {
1433 fws->stats.txs_supp_ps++;
1434 remove_from_hanger = false;
5631becb 1435 } else if (flags == BRCMF_FWS_TXSTATUS_FW_TOSSED)
3edc1cff 1436 fws->stats.txs_tossed++;
5631becb
AS		 1437 else if (flags == BRCMF_FWS_TXSTATUS_HOST_TOSSED)
1438 fws->stats.txs_host_tossed++;
3edc1cff
AS		 1439 else
1440 brcmf_err("unexpected txstatus\n");
1441
1442 ret = brcmf_fws_hanger_poppkt(&fws->hanger, hslot, &skb,
84bcc0c3 1443 remove_from_hanger);
3edc1cff
AS		 1444 if (ret != 0) {
1445 brcmf_err("no packet in hanger slot: hslot=%d\n", hslot);
1446 return ret;
1447 }
1448
8071fd61
AS		 1449 skcb = brcmf_skbcb(skb);
1450 entry = skcb->mac;
3edc1cff 1451 if (WARN_ON(!entry)) {
84bcc0c3
AS		 1452 brcmu_pkt_buf_free_skb(skb);
1453 return -EINVAL;
3edc1cff 1454 }
8c5140f6
HM		 1455 entry->transit_count--;
1456 if (entry->suppressed && entry->suppr_transit_count)
1457 entry->suppr_transit_count--;
3edc1cff 1458
1e86d696
HM		 1459 brcmf_dbg(DATA, "%s flags %d htod %X seq %X\n", entry->name, flags,
1460 skcb->htod, seq);
8071fd61 1461
84bcc0c3
AS		 1462 /* pick up the implicit credit from this packet */
1463 fifo = brcmf_skb_htod_tag_get_field(skb, FIFO);
fa587d4b
HM		 1464 if ((fws->fcmode == BRCMF_FWS_FCMODE_IMPLIED_CREDIT) ||
1465 (brcmf_skb_if_flags_get_field(skb, REQ_CREDIT)) ||
1466 (flags == BRCMF_FWS_TXSTATUS_HOST_TOSSED)) {
1467 brcmf_fws_return_credits(fws, fifo, 1);
1468 brcmf_fws_schedule_deq(fws);
1469 }
1470 brcmf_fws_macdesc_return_req_credit(skb);
3edc1cff 1471
53e30ea4
HM		 1472 if (brcmf_proto_hdrpull(fws->drvr, false, &ifidx, skb)) {
1473 brcmu_pkt_buf_free_skb(skb);
1474 return -EINVAL;
1475 }
84bcc0c3 1476 if (!remove_from_hanger)
53e30ea4
HM		 1477 ret = brcmf_fws_txstatus_suppressed(fws, fifo, skb, ifidx,
1478 genbit, seq);
8c5140f6 1479 if (remove_from_hanger || ret)
53e30ea4 1480 brcmf_txfinalize(fws->drvr, skb, ifidx, true);
8c5140f6 1481
84bcc0c3
AS		 1482 return 0;
1483}
1484
1485static int brcmf_fws_fifocreditback_indicate(struct brcmf_fws_info *fws,
1486 u8 *data)
1487{
1488 int i;
1489
1490 if (fws->fcmode != BRCMF_FWS_FCMODE_EXPLICIT_CREDIT) {
1491 brcmf_dbg(INFO, "ignored\n");
a5e9d805 1492 return BRCMF_FWS_RET_OK_NOSCHEDULE;
84bcc0c3
AS		 1493 }
1494
8071fd61 1495 brcmf_dbg(DATA, "enter: data %pM\n", data);
3f4f910f 1496 brcmf_fws_lock(fws);
84bcc0c3
AS		 1497 for (i = 0; i < BRCMF_FWS_FIFO_COUNT; i++)
1498 brcmf_fws_return_credits(fws, i, data[i]);
1499
8071fd61 1500 brcmf_dbg(DATA, "map: credit %x delay %x\n", fws->fifo_credit_map,
84bcc0c3 1501 fws->fifo_delay_map);
3f4f910f 1502 brcmf_fws_unlock(fws);
a5e9d805 1503 return BRCMF_FWS_RET_OK_SCHEDULE;
3edc1cff
AS		 1504}
1505
0f8b5cc5
AS		 1506static int brcmf_fws_txstatus_indicate(struct brcmf_fws_info *fws, u8 *data)
1507{
a2ffc566 1508 __le32 status_le;
1e86d696 1509 __le16 seq_le;
0f8b5cc5
AS		 1510 u32 status;
1511 u32 hslot;
84bcc0c3 1512 u32 genbit;
0f8b5cc5 1513 u8 flags;
1e86d696 1514 u16 seq;
0f8b5cc5
AS		 1515
1516 fws->stats.txs_indicate++;
a2ffc566
AS		 1517 memcpy(&status_le, data, sizeof(status_le));
1518 status = le32_to_cpu(status_le);
0f8b5cc5
AS		 1519 flags = brcmf_txstatus_get_field(status, FLAGS);
1520 hslot = brcmf_txstatus_get_field(status, HSLOT);
84bcc0c3 1521 genbit = brcmf_txstatus_get_field(status, GENERATION);
1e86d696
HM		 1522 if (BRCMF_FWS_MODE_GET_REUSESEQ(fws->mode)) {
1523 memcpy(&seq_le, &data[BRCMF_FWS_TYPE_PKTTAG_LEN],
1524 sizeof(seq_le));
1525 seq = le16_to_cpu(seq_le);
1526 } else {
1527 seq = 0;
1528 }
0f8b5cc5 1529
3f4f910f 1530 brcmf_fws_lock(fws);
1e86d696 1531 brcmf_fws_txs_process(fws, flags, hslot, genbit, seq);
3f4f910f 1532 brcmf_fws_unlock(fws);
c6a681ab 1533 return BRCMF_FWS_RET_OK_NOSCHEDULE;
0f8b5cc5
AS		 1534}
1535
349e7104
AS		 1536static int brcmf_fws_dbg_seqnum_check(struct brcmf_fws_info *fws, u8 *data)
1537{
1538 __le32 timestamp;
1539
1540 memcpy(&timestamp, &data[2], sizeof(timestamp));
8071fd61 1541 brcmf_dbg(CTL, "received: seq %d, timestamp %d\n", data[1],
349e7104
AS		 1542 le32_to_cpu(timestamp));
1543 return 0;
1544}
1545
43fa635e
AS		 1546static int brcmf_fws_notify_credit_map(struct brcmf_if *ifp,
1547 const struct brcmf_event_msg *e,
1548 void *data)
1549{
1550 struct brcmf_fws_info *fws = ifp->drvr->fws;
1551 int i;
43fa635e
AS		 1552 u8 *credits = data;
1553
84bcc0c3
AS		 1554 if (e->datalen < BRCMF_FWS_FIFO_COUNT) {
1555 brcmf_err("event payload too small (%d)\n", e->datalen);
1556 return -EINVAL;
1557 }
0d24b0ea
HM		 1558 if (fws->creditmap_received)
1559 return 0;
1560
1561 fws->creditmap_received = true;
84bcc0c3
AS		 1562
1563 brcmf_dbg(TRACE, "enter: credits %pM\n", credits);
3f4f910f 1564 brcmf_fws_lock(fws);
84bcc0c3
AS		 1565 for (i = 0; i < ARRAY_SIZE(fws->fifo_credit); i++) {
1566 if (*credits)
1567 fws->fifo_credit_map |= 1 << i;
1568 else
1569 fws->fifo_credit_map &= ~(1 << i);
43fa635e 1570 fws->fifo_credit[i] = *credits++;
84bcc0c3
AS		 1571 }
1572 brcmf_fws_schedule_deq(fws);
3f4f910f 1573 brcmf_fws_unlock(fws);
43fa635e
AS		 1574 return 0;
1575}
1576
7d747037
HM		 1577static int brcmf_fws_notify_bcmc_credit_support(struct brcmf_if *ifp,
1578 const struct brcmf_event_msg *e,
1579 void *data)
1580{
1581 struct brcmf_fws_info *fws = ifp->drvr->fws;
7d747037 1582
3f4f910f 1583 brcmf_fws_lock(fws);
7d747037
HM		 1584 if (fws)
1585 fws->bcmc_credit_check = true;
3f4f910f 1586 brcmf_fws_unlock(fws);
7d747037
HM		 1587 return 0;
1588}
1589
349e7104
AS		 1590int brcmf_fws_hdrpull(struct brcmf_pub *drvr, int ifidx, s16 signal_len,
1591 struct sk_buff *skb)
1592{
87edd891 1593 struct brcmf_skb_reorder_data *rd;
349e7104 1594 struct brcmf_fws_info *fws = drvr->fws;
349e7104
AS		 1595 u8 *signal_data;
1596 s16 data_len;
1597 u8 type;
1598 u8 len;
1599 u8 *data;
a5e9d805
AS		 1600 s32 status;
1601 s32 err;
349e7104 1602
8071fd61 1603 brcmf_dbg(HDRS, "enter: ifidx %d, skblen %u, sig %d\n",
349e7104
AS		 1604 ifidx, skb->len, signal_len);
1605
1606 WARN_ON(signal_len > skb->len);
1607
0a4254be
HM		 1608 if (!signal_len)
1609 return 0;
349e7104 1610 /* if flow control disabled, skip to packet data and leave */
0a4254be 1611 if (!fws->fw_signals) {
349e7104
AS		 1612 skb_pull(skb, signal_len);
1613 return 0;
1614 }
1615
349e7104
AS		 1616 fws->stats.header_pulls++;
1617 data_len = signal_len;
1618 signal_data = skb->data;
1619
a5e9d805 1620 status = BRCMF_FWS_RET_OK_NOSCHEDULE;
349e7104
AS		 1621 while (data_len > 0) {
1622 /* extract tlv info */
1623 type = signal_data[0];
1624
1625 /* FILLER type is actually not a TLV, but
1626 * a single byte that can be skipped.
1627 */
1628 if (type == BRCMF_FWS_TYPE_FILLER) {
1629 signal_data += 1;
1630 data_len -= 1;
1631 continue;
1632 }
1633 len = signal_data[1];
1634 data = signal_data + 2;
1635
8071fd61
AS		 1636 brcmf_dbg(HDRS, "tlv type=%s (%d), len=%d (%d)\n",
1637 brcmf_fws_get_tlv_name(type), type, len,
1638 brcmf_fws_get_tlv_len(fws, type));
2af15580 1639
349e7104
AS		 1640 /* abort parsing when length invalid */
1641 if (data_len < len + 2)
1642 break;
1643
f55d94a6 1644 if (len < brcmf_fws_get_tlv_len(fws, type))
bb8c8063
AS		 1645 break;
1646
a5e9d805 1647 err = BRCMF_FWS_RET_OK_NOSCHEDULE;
349e7104 1648 switch (type) {
bb8c8063 1649 case BRCMF_FWS_TYPE_COMP_TXSTATUS:
ce814c1b 1650 break;
87edd891
AS		 1651 case BRCMF_FWS_TYPE_HOST_REORDER_RXPKTS:
1652 rd = (struct brcmf_skb_reorder_data *)skb->cb;
1653 rd->reorder = data;
1654 break;
bb8c8063
AS		 1655 case BRCMF_FWS_TYPE_MACDESC_ADD:
1656 case BRCMF_FWS_TYPE_MACDESC_DEL:
ce814c1b 1657 brcmf_fws_macdesc_indicate(fws, type, data);
bb8c8063 1658 break;
33753d47
AS		 1659 case BRCMF_FWS_TYPE_MAC_OPEN:
1660 case BRCMF_FWS_TYPE_MAC_CLOSE:
a5e9d805 1661 err = brcmf_fws_macdesc_state_indicate(fws, type, data);
33753d47
AS		 1662 break;
1663 case BRCMF_FWS_TYPE_INTERFACE_OPEN:
1664 case BRCMF_FWS_TYPE_INTERFACE_CLOSE:
a5e9d805
AS		 1665 err = brcmf_fws_interface_state_indicate(fws, type,
1666 data);
33753d47 1667 break;
5f38b683
AS		 1668 case BRCMF_FWS_TYPE_MAC_REQUEST_CREDIT:
1669 case BRCMF_FWS_TYPE_MAC_REQUEST_PACKET:
a5e9d805 1670 err = brcmf_fws_request_indicate(fws, type, data);
5f38b683 1671 break;
3edc1cff
AS		 1672 case BRCMF_FWS_TYPE_TXSTATUS:
1673 brcmf_fws_txstatus_indicate(fws, data);
1674 break;
84bcc0c3 1675 case BRCMF_FWS_TYPE_FIFO_CREDITBACK:
a5e9d805 1676 err = brcmf_fws_fifocreditback_indicate(fws, data);
84bcc0c3 1677 break;
bb8c8063
AS		 1678 case BRCMF_FWS_TYPE_RSSI:
1679 brcmf_fws_rssi_indicate(fws, *data);
349e7104
AS		 1680 break;
1681 case BRCMF_FWS_TYPE_TRANS_ID:
349e7104
AS		 1682 brcmf_fws_dbg_seqnum_check(fws, data);
1683 break;
84bcc0c3
AS		 1684 case BRCMF_FWS_TYPE_PKTTAG:
1685 case BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP:
349e7104
AS		 1686 default:
1687 fws->stats.tlv_invalid_type++;
1688 break;
1689 }
a5e9d805
AS		 1690 if (err == BRCMF_FWS_RET_OK_SCHEDULE)
1691 status = BRCMF_FWS_RET_OK_SCHEDULE;
349e7104
AS		 1692 signal_data += len + 2;
1693 data_len -= len + 2;
1694 }
1695
1696 if (data_len != 0)
1697 fws->stats.tlv_parse_failed++;
1698
a5e9d805
AS		 1699 if (status == BRCMF_FWS_RET_OK_SCHEDULE)
1700 brcmf_fws_schedule_deq(fws);
1701
349e7104
AS		 1702 /* signalling processing result does
1703 * not affect the actual ethernet packet.
1704 */
1705 skb_pull(skb, signal_len);
1706
1707 /* this may be a signal-only packet
1708 */
1709 if (skb->len == 0)
1710 fws->stats.header_only_pkt++;
1711
349e7104
AS		 1712 return 0;
1713}
bb8c8063 1714
7b8a466e 1715static u8 brcmf_fws_precommit_skb(struct brcmf_fws_info *fws, int fifo,
3edc1cff
AS		 1716 struct sk_buff *p)
1717{
1718 struct brcmf_skbuff_cb *skcb = brcmf_skbcb(p);
1719 struct brcmf_fws_mac_descriptor *entry = skcb->mac;
3edc1cff
AS		 1720 u8 flags;
1721
1e86d696
HM		 1722 if (skcb->state != BRCMF_FWS_SKBSTATE_SUPPRESSED)
1723 brcmf_skb_htod_tag_set_field(p, GENERATION, entry->generation);
be4910ad 1724 flags = BRCMF_FWS_HTOD_FLAG_PKTFROMHOST;
fa587d4b 1725 if (brcmf_skb_if_flags_get_field(p, REQUESTED)) {
be4910ad
HM		 1726 /*
1727 * Indicate that this packet is being sent in response to an
1728 * explicit request from the firmware side.
1729 */
1730 flags |= BRCMF_FWS_HTOD_FLAG_PKT_REQUESTED;
1731 }
1732 brcmf_skb_htod_tag_set_field(p, FLAGS, flags);
7b8a466e 1733 return brcmf_fws_hdrpush(fws, p);
3edc1cff
AS		 1734}
1735
456d0685
AS		 1736static void brcmf_fws_rollback_toq(struct brcmf_fws_info *fws,
1737 struct sk_buff *skb, int fifo)
84bcc0c3 1738{
84bcc0c3 1739 struct brcmf_fws_mac_descriptor *entry;
84bcc0c3 1740 struct sk_buff *pktout;
456d0685 1741 int qidx, hslot;
84bcc0c3 1742 int rc = 0;
84bcc0c3 1743
84bcc0c3 1744 entry = brcmf_skbcb(skb)->mac;
456d0685
AS		 1745 if (entry->occupied) {
1746 qidx = 2 * fifo;
1747 if (brcmf_skbcb(skb)->state == BRCMF_FWS_SKBSTATE_SUPPRESSED)
1748 qidx++;
1749
1750 pktout = brcmu_pktq_penq_head(&entry->psq, qidx, skb);
1751 if (pktout == NULL) {
1752 brcmf_err("%s queue %d full\n", entry->name, qidx);
1753 rc = -ENOSPC;
84bcc0c3 1754 }
84bcc0c3 1755 } else {
456d0685 1756 brcmf_err("%s entry removed\n", entry->name);
84bcc0c3
AS		 1757 rc = -ENOENT;
1758 }
1759
67994fa2 1760 if (rc) {
84bcc0c3 1761 fws->stats.rollback_failed++;
456d0685 1762 hslot = brcmf_skb_htod_tag_get_field(skb, HSLOT);
fa587d4b 1763 brcmf_fws_txs_process(fws, BRCMF_FWS_TXSTATUS_HOST_TOSSED,
1e86d696 1764 hslot, 0, 0);
289ec1c7 1765 } else {
84bcc0c3 1766 fws->stats.rollback_success++;
fa587d4b
HM		 1767 brcmf_fws_return_credits(fws, fifo, 1);
1768 brcmf_fws_macdesc_return_req_credit(skb);
289ec1c7 1769 }
84bcc0c3
AS		 1770}
1771
1aac1e91
AS		 1772static int brcmf_fws_borrow_credit(struct brcmf_fws_info *fws)
1773{
1774 int lender_ac;
1775
afc3bbfc
HM		 1776 if (time_after(fws->borrow_defer_timestamp, jiffies)) {
1777 fws->fifo_credit_map &= ~(1 << BRCMF_FWS_FIFO_AC_BE);
1aac1e91 1778 return -ENAVAIL;
afc3bbfc 1779 }
1aac1e91
AS		 1780
1781 for (lender_ac = 0; lender_ac <= BRCMF_FWS_FIFO_AC_VO; lender_ac++) {
1782 if (fws->fifo_credit[lender_ac]) {
1783 fws->credits_borrowed[lender_ac]++;
1784 fws->fifo_credit[lender_ac]--;
1785 if (fws->fifo_credit[lender_ac] == 0)
1786 fws->fifo_credit_map &= ~(1 << lender_ac);
afc3bbfc 1787 fws->fifo_credit_map |= (1 << BRCMF_FWS_FIFO_AC_BE);
8071fd61 1788 brcmf_dbg(DATA, "borrow credit from: %d\n", lender_ac);
1aac1e91
AS		 1789 return 0;
1790 }
1791 }
afc3bbfc 1792 fws->fifo_credit_map &= ~(1 << BRCMF_FWS_FIFO_AC_BE);
1aac1e91
AS		 1793 return -ENAVAIL;
1794}
1795
3edc1cff
AS		 1796static int brcmf_fws_commit_skb(struct brcmf_fws_info *fws, int fifo,
1797 struct sk_buff *skb)
1798{
1799 struct brcmf_skbuff_cb *skcb = brcmf_skbcb(skb);
1800 struct brcmf_fws_mac_descriptor *entry;
3edc1cff 1801 int rc;
2747e5f7 1802 u8 ifidx;
7b8a466e 1803 u8 data_offset;
3edc1cff
AS		 1804
1805 entry = skcb->mac;
1806 if (IS_ERR(entry))
1807 return PTR_ERR(entry);
1808
7b8a466e 1809 data_offset = brcmf_fws_precommit_skb(fws, fifo, skb);
3f4f910f
HM		 1810 entry->transit_count++;
1811 if (entry->suppressed)
1812 entry->suppr_transit_count++;
7b8a466e 1813 ifidx = brcmf_skb_if_flags_get_field(skb, INDEX);
3f4f910f 1814 brcmf_fws_unlock(fws);
7b8a466e 1815 rc = brcmf_proto_txdata(fws->drvr, ifidx, data_offset, skb);
3f4f910f 1816 brcmf_fws_lock(fws);
456d0685
AS		 1817 brcmf_dbg(DATA, "%s flags %X htod %X bus_tx %d\n", entry->name,
1818 skcb->if_flags, skcb->htod, rc);
2747e5f7 1819 if (rc < 0) {
3f4f910f
HM		 1820 entry->transit_count--;
1821 if (entry->suppressed)
1822 entry->suppr_transit_count--;
2747e5f7 1823 brcmf_proto_hdrpull(fws->drvr, false, &ifidx, skb);
84bcc0c3 1824 goto rollback;
2747e5f7 1825 }
3edc1cff 1826
3edc1cff 1827 fws->stats.pkt2bus++;
cf3a6872 1828 fws->stats.send_pkts[fifo]++;
fa587d4b
HM		 1829 if (brcmf_skb_if_flags_get_field(skb, REQUESTED))
1830 fws->stats.requested_sent[fifo]++;
84bcc0c3 1831
3edc1cff
AS		 1832 return rc;
1833
84bcc0c3 1834rollback:
51f6dd9d 1835 brcmf_fws_rollback_toq(fws, skb, fifo);
3edc1cff
AS		 1836 return rc;
1837}
1838
456d0685
AS		 1839static int brcmf_fws_assign_htod(struct brcmf_fws_info *fws, struct sk_buff *p,
1840 int fifo)
1841{
1842 struct brcmf_skbuff_cb *skcb = brcmf_skbcb(p);
1843 int rc, hslot;
1844
1e86d696
HM		 1845 skcb->htod = 0;
1846 skcb->htod_seq = 0;
456d0685
AS		 1847 hslot = brcmf_fws_hanger_get_free_slot(&fws->hanger);
1848 brcmf_skb_htod_tag_set_field(p, HSLOT, hslot);
1849 brcmf_skb_htod_tag_set_field(p, FREERUN, skcb->mac->seq[fifo]);
1850 brcmf_skb_htod_tag_set_field(p, FIFO, fifo);
1851 rc = brcmf_fws_hanger_pushpkt(&fws->hanger, p, hslot);
1852 if (!rc)
1853 skcb->mac->seq[fifo]++;
1854 else
1855 fws->stats.generic_error++;
1856 return rc;
1857}
1858
3edc1cff
AS		 1859int brcmf_fws_process_skb(struct brcmf_if *ifp, struct sk_buff *skb)
1860{
1861 struct brcmf_pub *drvr = ifp->drvr;
1aac1e91 1862 struct brcmf_fws_info *fws = drvr->fws;
3edc1cff
AS		 1863 struct brcmf_skbuff_cb *skcb = brcmf_skbcb(skb);
1864 struct ethhdr *eh = (struct ethhdr *)(skb->data);
3edc1cff
AS		 1865 int fifo = BRCMF_FWS_FIFO_BCMC;
1866 bool multicast = is_multicast_ether_addr(eh->h_dest);
55929443 1867 int rc = 0;
3edc1cff 1868
87edd891 1869 brcmf_dbg(DATA, "tx proto=0x%X\n", ntohs(eh->h_proto));
3edc1cff
AS		 1870 /* determine the priority */
1871 if (!skb->priority)
fa9ffc74 1872 skb->priority = cfg80211_classify8021d(skb, NULL);
3edc1cff
AS		 1873
1874 drvr->tx_multicast += !!multicast;
3edc1cff 1875
9cd18359
HM		 1876 if (fws->avoid_queueing) {
1877 rc = brcmf_proto_txdata(drvr, ifp->ifidx, 0, skb);
1878 if (rc < 0)
1879 brcmf_txfinalize(drvr, skb, ifp->ifidx, false);
1880 return rc;
1881 }
1882
3edc1cff 1883 /* set control buffer information */
84bcc0c3 1884 skcb->if_flags = 0;
3edc1cff 1885 skcb->state = BRCMF_FWS_SKBSTATE_NEW;
31ed07dc 1886 brcmf_skb_if_flags_set_field(skb, INDEX, ifp->ifidx);
3edc1cff
AS		 1887 if (!multicast)
1888 fifo = brcmf_fws_prio2fifo[skb->priority];
3edc1cff 1889
3f4f910f 1890 brcmf_fws_lock(fws);
20863746
AS		 1891 if (fifo != BRCMF_FWS_FIFO_AC_BE && fifo < BRCMF_FWS_FIFO_BCMC)
1892 fws->borrow_defer_timestamp = jiffies +
1893 BRCMF_FWS_BORROW_DEFER_PERIOD;
456d0685
AS		 1894
1895 skcb->mac = brcmf_fws_macdesc_find(fws, ifp, eh->h_dest);
1896 brcmf_dbg(DATA, "%s mac %pM multi %d fifo %d\n", skcb->mac->name,
1897 eh->h_dest, multicast, fifo);
1898 if (!brcmf_fws_assign_htod(fws, skb, fifo)) {
1899 brcmf_fws_enq(fws, BRCMF_FWS_SKBSTATE_DELAYED, fifo, skb);
1900 brcmf_fws_schedule_deq(fws);
1901 } else {
1902 brcmf_err("drop skb: no hanger slot\n");
55929443
HM		 1903 brcmf_txfinalize(drvr, skb, ifp->ifidx, false);
1904 rc = -ENOMEM;
456d0685 1905 }
3f4f910f 1906 brcmf_fws_unlock(fws);
55929443
HM		 1907
1908 return rc;
3edc1cff
AS		 1909}
1910
bb8c8063
AS		 1911void brcmf_fws_reset_interface(struct brcmf_if *ifp)
1912{
1913 struct brcmf_fws_mac_descriptor *entry = ifp->fws_desc;
1914
1915 brcmf_dbg(TRACE, "enter: idx=%d\n", ifp->bssidx);
1916 if (!entry)
1917 return;
1918
1ab083a3 1919 brcmf_fws_macdesc_init(entry, ifp->mac_addr, ifp->ifidx);
bb8c8063
AS		 1920}
1921
1922void brcmf_fws_add_interface(struct brcmf_if *ifp)
1923{
84bcc0c3 1924 struct brcmf_fws_info *fws = ifp->drvr->fws;
bb8c8063
AS		 1925 struct brcmf_fws_mac_descriptor *entry;
1926
0a4254be 1927 if (!ifp->ndev)
bb8c8063
AS		 1928 return;
1929
84bcc0c3
AS		 1930 entry = &fws->desc.iface[ifp->ifidx];
1931 ifp->fws_desc = entry;
1ab083a3 1932 brcmf_fws_macdesc_init(entry, ifp->mac_addr, ifp->ifidx);
8071fd61 1933 brcmf_fws_macdesc_set_name(fws, entry);
84bcc0c3
AS		 1934 brcmu_pktq_init(&entry->psq, BRCMF_FWS_PSQ_PREC_COUNT,
1935 BRCMF_FWS_PSQ_LEN);
8071fd61 1936 brcmf_dbg(TRACE, "added %s\n", entry->name);
bb8c8063
AS		 1937}
1938
1939void brcmf_fws_del_interface(struct brcmf_if *ifp)
1940{
1941 struct brcmf_fws_mac_descriptor *entry = ifp->fws_desc;
1942
bb8c8063
AS		 1943 if (!entry)
1944 return;
1945
3f4f910f 1946 brcmf_fws_lock(ifp->drvr->fws);
bb8c8063 1947 ifp->fws_desc = NULL;
8071fd61 1948 brcmf_dbg(TRACE, "deleting %s\n", entry->name);
1ab083a3 1949 brcmf_fws_macdesc_deinit(entry);
a3e993c7 1950 brcmf_fws_cleanup(ifp->drvr->fws, ifp->ifidx);
3f4f910f 1951 brcmf_fws_unlock(ifp->drvr->fws);
84bcc0c3
AS		 1952}
1953
1954static void brcmf_fws_dequeue_worker(struct work_struct *worker)
1955{
1956 struct brcmf_fws_info *fws;
0a4254be 1957 struct brcmf_pub *drvr;
84bcc0c3 1958 struct sk_buff *skb;
84bcc0c3 1959 int fifo;
0a4254be
HM		 1960 u32 hslot;
1961 u32 ifidx;
1962 int ret;
84bcc0c3
AS		 1963
1964 fws = container_of(worker, struct brcmf_fws_info, fws_dequeue_work);
0a4254be 1965 drvr = fws->drvr;
84bcc0c3 1966
3f4f910f 1967 brcmf_fws_lock(fws);
2a5d7b02 1968 for (fifo = BRCMF_FWS_FIFO_BCMC; fifo >= 0 && !fws->bus_flow_blocked;
df50f756 1969 fifo--) {
0a4254be
HM		 1970 if (!brcmf_fws_fc_active(fws)) {
1971 while ((skb = brcmf_fws_deq(fws, fifo)) != NULL) {
1972 hslot = brcmf_skb_htod_tag_get_field(skb,
1973 HSLOT);
1974 brcmf_fws_hanger_poppkt(&fws->hanger, hslot,
1975 &skb, true);
1976 ifidx = brcmf_skb_if_flags_get_field(skb,
1977 INDEX);
7b8a466e 1978 /* Use proto layer to send data frame */
3f4f910f 1979 brcmf_fws_unlock(fws);
7b8a466e 1980 ret = brcmf_proto_txdata(drvr, ifidx, 0, skb);
3f4f910f 1981 brcmf_fws_lock(fws);
0a4254be 1982 if (ret < 0)
53e30ea4
HM		 1983 brcmf_txfinalize(drvr, skb, ifidx,
1984 false);
0a4254be
HM		 1985 if (fws->bus_flow_blocked)
1986 break;
1987 }
1988 continue;
1989 }
7d747037
HM		 1990 while ((fws->fifo_credit[fifo]) || ((!fws->bcmc_credit_check) &&
1991 (fifo == BRCMF_FWS_FIFO_BCMC))) {
84bcc0c3 1992 skb = brcmf_fws_deq(fws, fifo);
289ec1c7 1993 if (!skb)
84bcc0c3 1994 break;
fa587d4b 1995 fws->fifo_credit[fifo]--;
289ec1c7
AS		 1996 if (brcmf_fws_commit_skb(fws, fifo, skb))
1997 break;
df50f756
HM		 1998 if (fws->bus_flow_blocked)
1999 break;
84bcc0c3 2000 }
1aac1e91 2001 if ((fifo == BRCMF_FWS_FIFO_AC_BE) &&
289ec1c7 2002 (fws->fifo_credit[fifo] == 0) &&
df50f756 2003 (!fws->bus_flow_blocked)) {
1aac1e91
AS		 2004 while (brcmf_fws_borrow_credit(fws) == 0) {
2005 skb = brcmf_fws_deq(fws, fifo);
2006 if (!skb) {
2007 brcmf_fws_return_credits(fws, fifo, 1);
2008 break;
2009 }
eb2410cd
HM		 2010 if (brcmf_fws_commit_skb(fws, fifo, skb))
2011 break;
df50f756
HM		 2012 if (fws->bus_flow_blocked)
2013 break;
1aac1e91 2014 }
1aac1e91 2015 }
84bcc0c3 2016 }
3f4f910f 2017 brcmf_fws_unlock(fws);
bb8c8063 2018}
c7f34a69 2019
d9337414
AS		 2020int brcmf_fws_init(struct brcmf_pub *drvr)
2021{
0a4254be 2022 struct brcmf_fws_info *fws;
290fb763 2023 u32 tlv = BRCMF_FWS_FLAGS_RSSI_SIGNALS;
d9337414 2024 int rc;
1e86d696 2025 u32 mode;
d9337414 2026
d9337414
AS		 2027 drvr->fws = kzalloc(sizeof(*(drvr->fws)), GFP_KERNEL);
2028 if (!drvr->fws) {
2029 rc = -ENOMEM;
2030 goto fail;
2031 }
2032
0a4254be 2033 fws = drvr->fws;
3f4f910f
HM		 2034
2035 spin_lock_init(&fws->spinlock);
2036
d9337414 2037 /* set linkage back */
0a4254be
HM		 2038 fws->drvr = drvr;
2039 fws->fcmode = fcmode;
d9337414 2040
9cd18359
HM		 2041 if ((drvr->bus_if->always_use_fws_queue == false) &&
2042 (fcmode == BRCMF_FWS_FCMODE_NONE)) {
2043 fws->avoid_queueing = true;
2044 brcmf_dbg(INFO, "FWS queueing will be avoided\n");
2045 return 0;
2046 }
2047
0a4254be
HM		 2048 fws->fws_wq = create_singlethread_workqueue("brcmf_fws_wq");
2049 if (fws->fws_wq == NULL) {
84bcc0c3
AS		 2050 brcmf_err("workqueue creation failed\n");
2051 rc = -EBADF;
2052 goto fail;
2053 }
0a4254be 2054 INIT_WORK(&fws->fws_dequeue_work, brcmf_fws_dequeue_worker);
84bcc0c3 2055
290fb763 2056 /* enable firmware signalling if fcmode active */
0a4254be 2057 if (fws->fcmode != BRCMF_FWS_FCMODE_NONE)
290fb763 2058 tlv |= BRCMF_FWS_FLAGS_XONXOFF_SIGNALS |
33753d47 2059 BRCMF_FWS_FLAGS_CREDIT_STATUS_SIGNALS |
87edd891
AS		 2060 BRCMF_FWS_FLAGS_HOST_PROPTXSTATUS_ACTIVE |
2061 BRCMF_FWS_FLAGS_HOST_RXREORDER_ACTIVE;
290fb763 2062
a786b38d
AS		 2063 rc = brcmf_fweh_register(drvr, BRCMF_E_FIFO_CREDIT_MAP,
2064 brcmf_fws_notify_credit_map);
d9337414 2065 if (rc < 0) {
a786b38d 2066 brcmf_err("register credit map handler failed\n");
d9337414
AS		 2067 goto fail;
2068 }
7d747037
HM		 2069 rc = brcmf_fweh_register(drvr, BRCMF_E_BCMC_CREDIT_SUPPORT,
2070 brcmf_fws_notify_bcmc_credit_support);
2071 if (rc < 0) {
2072 brcmf_err("register bcmc credit handler failed\n");
2073 brcmf_fweh_unregister(drvr, BRCMF_E_FIFO_CREDIT_MAP);
2074 goto fail;
2075 }
d9337414 2076
0a4254be 2077 /* Setting the iovar may fail if feature is unsupported
a786b38d 2078 * so leave the rc as is so driver initialization can
0a4254be 2079 * continue. Set mode back to none indicating not enabled.
a786b38d 2080 */
0a4254be 2081 fws->fw_signals = true;
a786b38d
AS		 2082 if (brcmf_fil_iovar_int_set(drvr->iflist[0], "tlv", tlv)) {
2083 brcmf_err("failed to set bdcv2 tlv signaling\n");
0a4254be
HM		 2084 fws->fcmode = BRCMF_FWS_FCMODE_NONE;
2085 fws->fw_signals = false;
d9337414
AS		 2086 }
2087
87edd891
AS		 2088 if (brcmf_fil_iovar_int_set(drvr->iflist[0], "ampdu_hostreorder", 1))
2089 brcmf_dbg(INFO, "enabling AMPDU host-reorder failed\n");
2090
1e86d696
HM		 2091 /* Enable seq number reuse, if supported */
2092 if (brcmf_fil_iovar_int_get(drvr->iflist[0], "wlfc_mode", &mode) == 0) {
2093 if (BRCMF_FWS_MODE_GET_REUSESEQ(mode)) {
2094 mode = 0;
2095 BRCMF_FWS_MODE_SET_REUSESEQ(mode, 1);
2096 if (brcmf_fil_iovar_int_set(drvr->iflist[0],
2097 "wlfc_mode", mode) == 0) {
2098 BRCMF_FWS_MODE_SET_REUSESEQ(fws->mode, 1);
2099 }
2100 }
2101 }
2102
0a4254be
HM		 2103 brcmf_fws_hanger_init(&fws->hanger);
2104 brcmf_fws_macdesc_init(&fws->desc.other, NULL, 0);
2105 brcmf_fws_macdesc_set_name(fws, &fws->desc.other);
2106 brcmu_pktq_init(&fws->desc.other.psq, BRCMF_FWS_PSQ_PREC_COUNT,
84bcc0c3 2107 BRCMF_FWS_PSQ_LEN);
d9337414
AS		 2108
2109 /* create debugfs file for statistics */
0a4254be 2110 brcmf_debugfs_create_fws_stats(drvr, &fws->stats);
d9337414 2111
8071fd61 2112 brcmf_dbg(INFO, "%s bdcv2 tlv signaling [%x]\n",
0a4254be 2113 fws->fw_signals ? "enabled" : "disabled", tlv);
d9337414
AS		 2114 return 0;
2115
2116fail:
d9337414
AS		 2117 brcmf_fws_deinit(drvr);
2118 return rc;
2119}
2120
2121void brcmf_fws_deinit(struct brcmf_pub *drvr)
2122{
2123 struct brcmf_fws_info *fws = drvr->fws;
d9337414 2124
47829f4f
AS		 2125 if (!fws)
2126 return;
2127
a786b38d
AS		 2128 if (drvr->fws->fws_wq)
2129 destroy_workqueue(drvr->fws->fws_wq);
2130
d9337414 2131 /* cleanup */
3f4f910f 2132 brcmf_fws_lock(fws);
d9337414
AS		 2133 brcmf_fws_cleanup(fws, -1);
2134 drvr->fws = NULL;
3f4f910f 2135 brcmf_fws_unlock(fws);
d9337414
AS		 2136
2137 /* free top structure */
2138 kfree(fws);
2139}
2140
c7f34a69
AS		 2141bool brcmf_fws_fc_active(struct brcmf_fws_info *fws)
2142{
0a4254be 2143 if (!fws->creditmap_received)
c7f34a69
AS		 2144 return false;
2145
c7f34a69
AS		 2146 return fws->fcmode != BRCMF_FWS_FCMODE_NONE;
2147}
0f8b5cc5
AS		 2148
2149void brcmf_fws_bustxfail(struct brcmf_fws_info *fws, struct sk_buff *skb)
2150{
fa587d4b 2151 u32 hslot;
0f8b5cc5 2152
c7773fc1
AS		 2153 if (brcmf_skbcb(skb)->state == BRCMF_FWS_SKBSTATE_TIM) {
2154 brcmu_pkt_buf_free_skb(skb);
2155 return;
2156 }
3f4f910f 2157 brcmf_fws_lock(fws);
fa587d4b 2158 hslot = brcmf_skb_htod_tag_get_field(skb, HSLOT);
1e86d696 2159 brcmf_fws_txs_process(fws, BRCMF_FWS_TXSTATUS_HOST_TOSSED, hslot, 0, 0);
3f4f910f 2160 brcmf_fws_unlock(fws);
0f8b5cc5 2161}
df50f756
HM		 2162
2163void brcmf_fws_bus_blocked(struct brcmf_pub *drvr, bool flow_blocked)
2164{
2165 struct brcmf_fws_info *fws = drvr->fws;
2166
2167 fws->bus_flow_blocked = flow_blocked;
2168 if (!flow_blocked)
2169 brcmf_fws_schedule_deq(fws);
5631becb
AS		 2170 else
2171 fws->stats.bus_flow_block++;
df50f756 2172}
Linux kernel - Deliverables
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