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brcmfmac: remove unnecessary EXPORT_SYMBOL() usage
[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;
3edc1cff
AS		 479};
480
481/*
482 * brcmf_fws_prio2fifo - mapping from 802.1d priority to firmware fifo index.
483 */
484static const int brcmf_fws_prio2fifo[] = {
485 BRCMF_FWS_FIFO_AC_BE,
486 BRCMF_FWS_FIFO_AC_BK,
487 BRCMF_FWS_FIFO_AC_BK,
488 BRCMF_FWS_FIFO_AC_BE,
489 BRCMF_FWS_FIFO_AC_VI,
490 BRCMF_FWS_FIFO_AC_VI,
491 BRCMF_FWS_FIFO_AC_VO,
492 BRCMF_FWS_FIFO_AC_VO
349e7104
AS		 493};
494
c7f34a69
AS		 495static int fcmode;
496module_param(fcmode, int, S_IRUSR);
497MODULE_PARM_DESC(fcmode, "mode of firmware signalled flow control");
498
bb8c8063
AS		 499#define BRCMF_FWS_TLV_DEF(name, id, len) \
500 case BRCMF_FWS_TYPE_ ## name: \
501 return len;
502
3edc1cff
AS		 503/**
504 * brcmf_fws_get_tlv_len() - returns defined length for given tlv id.
505 *
506 * @fws: firmware-signalling information.
507 * @id: identifier of the TLV.
508 *
509 * Return: the specified length for the given TLV; Otherwise -EINVAL.
510 */
bb8c8063
AS		 511static int brcmf_fws_get_tlv_len(struct brcmf_fws_info *fws,
512 enum brcmf_fws_tlv_type id)
513{
514 switch (id) {
515 BRCMF_FWS_TLV_DEFLIST
516 default:
bb8c8063
AS		 517 fws->stats.tlv_invalid_type++;
518 break;
519 }
520 return -EINVAL;
521}
522#undef BRCMF_FWS_TLV_DEF
523
3f4f910f
HM		 524static void brcmf_fws_lock(struct brcmf_fws_info *fws)
525 __acquires(&fws->spinlock)
526{
527 spin_lock_irqsave(&fws->spinlock, fws->flags);
528}
529
530static void brcmf_fws_unlock(struct brcmf_fws_info *fws)
531 __releases(&fws->spinlock)
532{
533 spin_unlock_irqrestore(&fws->spinlock, fws->flags);
534}
535
3edc1cff
AS		 536static bool brcmf_fws_ifidx_match(struct sk_buff *skb, void *arg)
537{
538 u32 ifidx = brcmf_skb_if_flags_get_field(skb, INDEX);
539 return ifidx == *(int *)arg;
540}
541
542static void brcmf_fws_psq_flush(struct brcmf_fws_info *fws, struct pktq *q,
543 int ifidx)
544{
545 bool (*matchfn)(struct sk_buff *, void *) = NULL;
546 struct sk_buff *skb;
547 int prec;
548
549 if (ifidx != -1)
550 matchfn = brcmf_fws_ifidx_match;
551 for (prec = 0; prec < q->num_prec; prec++) {
552 skb = brcmu_pktq_pdeq_match(q, prec, matchfn, &ifidx);
553 while (skb) {
84bcc0c3 554 brcmu_pkt_buf_free_skb(skb);
3edc1cff
AS		 555 skb = brcmu_pktq_pdeq_match(q, prec, matchfn, &ifidx);
556 }
557 }
558}
559
6971280a
AS		 560static void brcmf_fws_hanger_init(struct brcmf_fws_hanger *hanger)
561{
562 int i;
563
6971280a
AS		 564 memset(hanger, 0, sizeof(*hanger));
565 for (i = 0; i < ARRAY_SIZE(hanger->items); i++)
3edc1cff 566 hanger->items[i].state = BRCMF_FWS_HANGER_ITEM_STATE_FREE;
6971280a
AS		 567}
568
3edc1cff 569static u32 brcmf_fws_hanger_get_free_slot(struct brcmf_fws_hanger *h)
6971280a
AS		 570{
571 u32 i;
572
6971280a
AS		 573 i = (h->slot_pos + 1) % BRCMF_FWS_HANGER_MAXITEMS;
574
575 while (i != h->slot_pos) {
3edc1cff 576 if (h->items[i].state == BRCMF_FWS_HANGER_ITEM_STATE_FREE) {
6971280a 577 h->slot_pos = i;
84bcc0c3 578 goto done;
6971280a
AS		 579 }
580 i++;
581 if (i == BRCMF_FWS_HANGER_MAXITEMS)
582 i = 0;
583 }
584 brcmf_err("all slots occupied\n");
585 h->failed_slotfind++;
84bcc0c3
AS		 586 i = BRCMF_FWS_HANGER_MAXITEMS;
587done:
84bcc0c3 588 return i;
6971280a
AS		 589}
590
3edc1cff 591static int brcmf_fws_hanger_pushpkt(struct brcmf_fws_hanger *h,
be4910ad 592 struct sk_buff *pkt, u32 slot_id)
6971280a 593{
6971280a
AS		 594 if (slot_id >= BRCMF_FWS_HANGER_MAXITEMS)
595 return -ENOENT;
596
597 if (h->items[slot_id].state != BRCMF_FWS_HANGER_ITEM_STATE_FREE) {
598 brcmf_err("slot is not free\n");
599 h->failed_to_push++;
600 return -EINVAL;
601 }
602
603 h->items[slot_id].state = BRCMF_FWS_HANGER_ITEM_STATE_INUSE;
604 h->items[slot_id].pkt = pkt;
6971280a
AS		 605 h->pushed++;
606 return 0;
607}
608
3edc1cff 609static int brcmf_fws_hanger_poppkt(struct brcmf_fws_hanger *h,
6971280a
AS		 610 u32 slot_id, struct sk_buff **pktout,
611 bool remove_item)
612{
6971280a
AS		 613 if (slot_id >= BRCMF_FWS_HANGER_MAXITEMS)
614 return -ENOENT;
615
616 if (h->items[slot_id].state == BRCMF_FWS_HANGER_ITEM_STATE_FREE) {
617 brcmf_err("entry not in use\n");
618 h->failed_to_pop++;
619 return -EINVAL;
620 }
621
622 *pktout = h->items[slot_id].pkt;
623 if (remove_item) {
624 h->items[slot_id].state = BRCMF_FWS_HANGER_ITEM_STATE_FREE;
625 h->items[slot_id].pkt = NULL;
6971280a
AS		 626 h->popped++;
627 }
628 return 0;
629}
630
84bcc0c3 631static int brcmf_fws_hanger_mark_suppressed(struct brcmf_fws_hanger *h,
be4910ad 632 u32 slot_id)
6971280a 633{
6971280a
AS		 634 if (slot_id >= BRCMF_FWS_HANGER_MAXITEMS)
635 return -ENOENT;
636
5631becb 637 if (h->items[slot_id].state == BRCMF_FWS_HANGER_ITEM_STATE_FREE) {
6971280a
AS		 638 brcmf_err("entry not in use\n");
639 return -EINVAL;
640 }
641
3edc1cff 642 h->items[slot_id].state = BRCMF_FWS_HANGER_ITEM_STATE_INUSE_SUPPRESSED;
6971280a
AS		 643 return 0;
644}
645
84bcc0c3 646static void brcmf_fws_hanger_cleanup(struct brcmf_fws_info *fws,
6971280a
AS		 647 bool (*fn)(struct sk_buff *, void *),
648 int ifidx)
649{
84bcc0c3 650 struct brcmf_fws_hanger *h = &fws->hanger;
6971280a
AS		 651 struct sk_buff *skb;
652 int i;
653 enum brcmf_fws_hanger_item_state s;
654
6971280a
AS		 655 for (i = 0; i < ARRAY_SIZE(h->items); i++) {
656 s = h->items[i].state;
657 if (s == BRCMF_FWS_HANGER_ITEM_STATE_INUSE ||
658 s == BRCMF_FWS_HANGER_ITEM_STATE_INUSE_SUPPRESSED) {
659 skb = h->items[i].pkt;
660 if (fn == NULL || fn(skb, &ifidx)) {
661 /* suppress packets freed from psq */
662 if (s == BRCMF_FWS_HANGER_ITEM_STATE_INUSE)
663 brcmu_pkt_buf_free_skb(skb);
664 h->items[i].state =
665 BRCMF_FWS_HANGER_ITEM_STATE_FREE;
666 }
667 }
668 }
669}
670
8071fd61
AS		 671static void brcmf_fws_macdesc_set_name(struct brcmf_fws_info *fws,
672 struct brcmf_fws_mac_descriptor *desc)
673{
674 if (desc == &fws->desc.other)
675 strlcpy(desc->name, "MAC-OTHER", sizeof(desc->name));
676 else if (desc->mac_handle)
677 scnprintf(desc->name, sizeof(desc->name), "MAC-%d:%d",
678 desc->mac_handle, desc->interface_id);
679 else
680 scnprintf(desc->name, sizeof(desc->name), "MACIF:%d",
681 desc->interface_id);
682}
683
1ab083a3
AS		 684static void brcmf_fws_macdesc_init(struct brcmf_fws_mac_descriptor *desc,
685 u8 *addr, u8 ifidx)
ce814c1b 686{
84bcc0c3
AS		 687 brcmf_dbg(TRACE,
688 "enter: desc %p ea=%pM, ifidx=%u\n", desc, addr, ifidx);
ce814c1b
AS		 689 desc->occupied = 1;
690 desc->state = BRCMF_FWS_STATE_OPEN;
691 desc->requested_credit = 0;
fa587d4b 692 desc->requested_packet = 0;
ce814c1b
AS		 693 /* depending on use may need ifp->bssidx instead */
694 desc->interface_id = ifidx;
695 desc->ac_bitmap = 0xff; /* update this when handling APSD */
84bcc0c3
AS		 696 if (addr)
697 memcpy(&desc->ea[0], addr, ETH_ALEN);
ce814c1b
AS		 698}
699
700static
1ab083a3 701void brcmf_fws_macdesc_deinit(struct brcmf_fws_mac_descriptor *desc)
ce814c1b
AS		 702{
703 brcmf_dbg(TRACE,
704 "enter: ea=%pM, ifidx=%u\n", desc->ea, desc->interface_id);
705 desc->occupied = 0;
706 desc->state = BRCMF_FWS_STATE_CLOSE;
707 desc->requested_credit = 0;
fa587d4b 708 desc->requested_packet = 0;
ce814c1b
AS		 709}
710
711static struct brcmf_fws_mac_descriptor *
1ab083a3 712brcmf_fws_macdesc_lookup(struct brcmf_fws_info *fws, u8 *ea)
ce814c1b
AS		 713{
714 struct brcmf_fws_mac_descriptor *entry;
715 int i;
716
ce814c1b
AS		 717 if (ea == NULL)
718 return ERR_PTR(-EINVAL);
719
84bcc0c3
AS		 720 entry = &fws->desc.nodes[0];
721 for (i = 0; i < ARRAY_SIZE(fws->desc.nodes); i++) {
ce814c1b
AS		 722 if (entry->occupied && !memcmp(entry->ea, ea, ETH_ALEN))
723 return entry;
724 entry++;
725 }
726
727 return ERR_PTR(-ENOENT);
728}
729
3edc1cff 730static struct brcmf_fws_mac_descriptor*
1ab083a3 731brcmf_fws_macdesc_find(struct brcmf_fws_info *fws, struct brcmf_if *ifp, u8 *da)
3edc1cff 732{
84bcc0c3 733 struct brcmf_fws_mac_descriptor *entry = &fws->desc.other;
3edc1cff 734 bool multicast;
3edc1cff 735
f97a7f06 736 multicast = is_multicast_ether_addr(da);
a7965fbb 737
5cd51c2b
HM		 738 /* Multicast destination, STA and P2P clients get the interface entry.
739 * STA/GC gets the Mac Entry for TDLS destinations, TDLS destinations
740 * have their own entry.
3edc1cff 741 */
5cd51c2b 742 if (multicast && ifp->fws_desc) {
3edc1cff 743 entry = ifp->fws_desc;
3edc1cff 744 goto done;
5cd51c2b 745 }
3edc1cff 746
1ab083a3 747 entry = brcmf_fws_macdesc_lookup(fws, da);
3edc1cff 748 if (IS_ERR(entry))
5cd51c2b 749 entry = ifp->fws_desc;
3edc1cff
AS		 750
751done:
3edc1cff
AS		 752 return entry;
753}
754
1ab083a3
AS		 755static bool brcmf_fws_macdesc_closed(struct brcmf_fws_info *fws,
756 struct brcmf_fws_mac_descriptor *entry,
757 int fifo)
84bcc0c3 758{
b75c1a30 759 struct brcmf_fws_mac_descriptor *if_entry;
9fc60224 760 bool closed;
84bcc0c3 761
b75c1a30
AS		 762 /* for unique destination entries the related interface
763 * may be closed.
764 */
765 if (entry->mac_handle) {
766 if_entry = &fws->desc.iface[entry->interface_id];
767 if (if_entry->state == BRCMF_FWS_STATE_CLOSE)
768 return true;
769 }
9fc60224
AS		 770 /* an entry is closed when the state is closed and
771 * the firmware did not request anything.
84bcc0c3 772 */
9fc60224
AS		 773 closed = entry->state == BRCMF_FWS_STATE_CLOSE &&
774 !entry->requested_credit && !entry->requested_packet;
84bcc0c3 775
9fc60224
AS		 776 /* Or firmware does not allow traffic for given fifo */
777 return closed || !(entry->ac_bitmap & BIT(fifo));
84bcc0c3
AS		 778}
779
1ab083a3
AS		 780static void brcmf_fws_macdesc_cleanup(struct brcmf_fws_info *fws,
781 struct brcmf_fws_mac_descriptor *entry,
782 int ifidx)
fba1400a 783{
3edc1cff 784 if (entry->occupied && (ifidx == -1 || ifidx == entry->interface_id)) {
3edc1cff 785 brcmf_fws_psq_flush(fws, &entry->psq, ifidx);
fba1400a
AS		 786 entry->occupied = !!(entry->psq.len);
787 }
788}
789
e2432b67
AS		 790static void brcmf_fws_bus_txq_cleanup(struct brcmf_fws_info *fws,
791 bool (*fn)(struct sk_buff *, void *),
792 int ifidx)
793{
794 struct brcmf_fws_hanger_item *hi;
795 struct pktq *txq;
796 struct sk_buff *skb;
797 int prec;
798 u32 hslot;
799
e2432b67
AS		 800 txq = brcmf_bus_gettxq(fws->drvr->bus_if);
801 if (IS_ERR(txq)) {
802 brcmf_dbg(TRACE, "no txq to clean up\n");
803 return;
804 }
805
806 for (prec = 0; prec < txq->num_prec; prec++) {
807 skb = brcmu_pktq_pdeq_match(txq, prec, fn, &ifidx);
808 while (skb) {
809 hslot = brcmf_skb_htod_tag_get_field(skb, HSLOT);
810 hi = &fws->hanger.items[hslot];
811 WARN_ON(skb != hi->pkt);
812 hi->state = BRCMF_FWS_HANGER_ITEM_STATE_FREE;
813 brcmu_pkt_buf_free_skb(skb);
814 skb = brcmu_pktq_pdeq_match(txq, prec, fn, &ifidx);
815 }
816 }
817}
818
fba1400a
AS		 819static void brcmf_fws_cleanup(struct brcmf_fws_info *fws, int ifidx)
820{
821 int i;
822 struct brcmf_fws_mac_descriptor *table;
a3e993c7 823 bool (*matchfn)(struct sk_buff *, void *) = NULL;
fba1400a 824
fba1400a
AS		 825 if (fws == NULL)
826 return;
827
a3e993c7
AS		 828 if (ifidx != -1)
829 matchfn = brcmf_fws_ifidx_match;
830
fba1400a 831 /* cleanup individual nodes */
84bcc0c3
AS		 832 table = &fws->desc.nodes[0];
833 for (i = 0; i < ARRAY_SIZE(fws->desc.nodes); i++)
1ab083a3 834 brcmf_fws_macdesc_cleanup(fws, &table[i], ifidx);
fba1400a 835
1ab083a3 836 brcmf_fws_macdesc_cleanup(fws, &fws->desc.other, ifidx);
e2432b67 837 brcmf_fws_bus_txq_cleanup(fws, matchfn, ifidx);
84bcc0c3
AS		 838 brcmf_fws_hanger_cleanup(fws, matchfn, ifidx);
839}
840
c7773fc1 841static int brcmf_fws_hdrpush(struct brcmf_fws_info *fws, struct sk_buff *skb)
84bcc0c3 842{
c7773fc1
AS		 843 struct brcmf_fws_mac_descriptor *entry = brcmf_skbcb(skb)->mac;
844 u8 *wlh;
845 u16 data_offset = 0;
846 u8 fillers;
847 __le32 pkttag = cpu_to_le32(brcmf_skbcb(skb)->htod);
1e86d696 848 __le16 pktseq = cpu_to_le16(brcmf_skbcb(skb)->htod_seq);
c7773fc1 849
1e86d696 850 brcmf_dbg(TRACE, "enter: %s, idx=%d hslot=%d htod %X seq %X\n",
80898a11 851 entry->name, brcmf_skb_if_flags_get_field(skb, INDEX),
1e86d696
HM		 852 (le32_to_cpu(pkttag) >> 8) & 0xffff,
853 brcmf_skbcb(skb)->htod, brcmf_skbcb(skb)->htod_seq);
c7773fc1
AS		 854 if (entry->send_tim_signal)
855 data_offset += 2 + BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP_LEN;
1e86d696
HM		 856 if (BRCMF_FWS_MODE_GET_REUSESEQ(fws->mode))
857 data_offset += BRCMF_FWS_TYPE_SEQ_LEN;
c7773fc1
AS		 858 /* +2 is for Type[1] and Len[1] in TLV, plus TIM signal */
859 data_offset += 2 + BRCMF_FWS_TYPE_PKTTAG_LEN;
860 fillers = round_up(data_offset, 4) - data_offset;
861 data_offset += fillers;
862
863 skb_push(skb, data_offset);
864 wlh = skb->data;
865
866 wlh[0] = BRCMF_FWS_TYPE_PKTTAG;
867 wlh[1] = BRCMF_FWS_TYPE_PKTTAG_LEN;
868 memcpy(&wlh[2], &pkttag, sizeof(pkttag));
1e86d696
HM		 869 if (BRCMF_FWS_MODE_GET_REUSESEQ(fws->mode)) {
870 wlh[1] += BRCMF_FWS_TYPE_SEQ_LEN;
871 memcpy(&wlh[2 + BRCMF_FWS_TYPE_PKTTAG_LEN], &pktseq,
872 sizeof(pktseq));
873 }
874 wlh += wlh[1] + 2;
c7773fc1
AS		 875
876 if (entry->send_tim_signal) {
877 entry->send_tim_signal = 0;
878 wlh[0] = BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP;
879 wlh[1] = BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP_LEN;
880 wlh[2] = entry->mac_handle;
881 wlh[3] = entry->traffic_pending_bmp;
80898a11
AS		 882 brcmf_dbg(TRACE, "adding TIM info: handle %d bmp 0x%X\n",
883 entry->mac_handle, entry->traffic_pending_bmp);
c7773fc1
AS		 884 wlh += BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP_LEN + 2;
885 entry->traffic_lastreported_bmp = entry->traffic_pending_bmp;
84bcc0c3 886 }
c7773fc1
AS		 887 if (fillers)
888 memset(wlh, BRCMF_FWS_TYPE_FILLER, fillers);
889
890 brcmf_proto_hdrpush(fws->drvr, brcmf_skb_if_flags_get_field(skb, INDEX),
891 data_offset >> 2, skb);
892 return 0;
893}
894
895static bool brcmf_fws_tim_update(struct brcmf_fws_info *fws,
896 struct brcmf_fws_mac_descriptor *entry,
4e89dfca 897 int fifo, bool send_immediately)
c7773fc1
AS		 898{
899 struct sk_buff *skb;
900 struct brcmf_bus *bus;
901 struct brcmf_skbuff_cb *skcb;
902 s32 err;
903 u32 len;
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;
c7773fc1
AS		 931 bus = fws->drvr->bus_if;
932 err = brcmf_fws_hdrpush(fws, skb);
3f4f910f
HM		 933 if (err == 0) {
934 brcmf_fws_unlock(fws);
c7773fc1 935 err = brcmf_bus_txdata(bus, skb);
3f4f910f
HM		 936 brcmf_fws_lock(fws);
937 }
c7773fc1
AS		 938 if (err)
939 brcmu_pkt_buf_free_skb(skb);
940 return true;
941 }
942 return false;
84bcc0c3
AS		 943}
944
945static void
946brcmf_fws_flow_control_check(struct brcmf_fws_info *fws, struct pktq *pq,
947 u8 if_id)
948{
402e3ba2 949 struct brcmf_if *ifp = fws->drvr->iflist[!if_id ? 0 : if_id + 1];
84bcc0c3 950
84bcc0c3
AS		 951 if (WARN_ON(!ifp))
952 return;
953
954 if ((ifp->netif_stop & BRCMF_NETIF_STOP_REASON_FWS_FC) &&
955 pq->len <= BRCMF_FWS_FLOWCONTROL_LOWATER)
956 brcmf_txflowblock_if(ifp,
957 BRCMF_NETIF_STOP_REASON_FWS_FC, false);
958 if (!(ifp->netif_stop & BRCMF_NETIF_STOP_REASON_FWS_FC) &&
5631becb
AS		 959 pq->len >= BRCMF_FWS_FLOWCONTROL_HIWATER) {
960 fws->stats.fws_flow_block++;
84bcc0c3 961 brcmf_txflowblock_if(ifp, BRCMF_NETIF_STOP_REASON_FWS_FC, true);
5631becb 962 }
84bcc0c3 963 return;
fba1400a
AS		 964}
965
349e7104
AS		 966static int brcmf_fws_rssi_indicate(struct brcmf_fws_info *fws, s8 rssi)
967{
968 brcmf_dbg(CTL, "rssi %d\n", rssi);
969 return 0;
970}
971
ce814c1b
AS		 972static
973int brcmf_fws_macdesc_indicate(struct brcmf_fws_info *fws, u8 type, u8 *data)
974{
975 struct brcmf_fws_mac_descriptor *entry, *existing;
976 u8 mac_handle;
977 u8 ifidx;
978 u8 *addr;
979
980 mac_handle = *data++;
981 ifidx = *data++;
982 addr = data;
983
84bcc0c3 984 entry = &fws->desc.nodes[mac_handle & 0x1F];
ce814c1b 985 if (type == BRCMF_FWS_TYPE_MACDESC_DEL) {
9a83f1ec 986 if (entry->occupied) {
8071fd61
AS		 987 brcmf_dbg(TRACE, "deleting %s mac %pM\n",
988 entry->name, addr);
3f4f910f 989 brcmf_fws_lock(fws);
1ab083a3
AS		 990 brcmf_fws_macdesc_cleanup(fws, entry, -1);
991 brcmf_fws_macdesc_deinit(entry);
3f4f910f 992 brcmf_fws_unlock(fws);
9a83f1ec 993 } else
ce814c1b 994 fws->stats.mac_update_failed++;
ce814c1b
AS		 995 return 0;
996 }
997
1ab083a3 998 existing = brcmf_fws_macdesc_lookup(fws, addr);
ce814c1b
AS		 999 if (IS_ERR(existing)) {
1000 if (!entry->occupied) {
3f4f910f 1001 brcmf_fws_lock(fws);
ce814c1b 1002 entry->mac_handle = mac_handle;
1ab083a3 1003 brcmf_fws_macdesc_init(entry, addr, ifidx);
8071fd61 1004 brcmf_fws_macdesc_set_name(fws, entry);
ce814c1b
AS		 1005 brcmu_pktq_init(&entry->psq, BRCMF_FWS_PSQ_PREC_COUNT,
1006 BRCMF_FWS_PSQ_LEN);
3f4f910f 1007 brcmf_fws_unlock(fws);
8071fd61 1008 brcmf_dbg(TRACE, "add %s mac %pM\n", entry->name, addr);
ce814c1b
AS		 1009 } else {
1010 fws->stats.mac_update_failed++;
1011 }
1012 } else {
1013 if (entry != existing) {
8071fd61 1014 brcmf_dbg(TRACE, "copy mac %s\n", existing->name);
3f4f910f 1015 brcmf_fws_lock(fws);
ce814c1b
AS		 1016 memcpy(entry, existing,
1017 offsetof(struct brcmf_fws_mac_descriptor, psq));
1018 entry->mac_handle = mac_handle;
1ab083a3 1019 brcmf_fws_macdesc_deinit(existing);
8071fd61 1020 brcmf_fws_macdesc_set_name(fws, entry);
3f4f910f 1021 brcmf_fws_unlock(fws);
8071fd61
AS		 1022 brcmf_dbg(TRACE, "relocate %s mac %pM\n", entry->name,
1023 addr);
ce814c1b
AS		 1024 } else {
1025 brcmf_dbg(TRACE, "use existing\n");
1026 WARN_ON(entry->mac_handle != mac_handle);
1027 /* TODO: what should we do here: continue, reinit, .. */
1028 }
1029 }
1030 return 0;
1031}
1032
33753d47
AS		 1033static int brcmf_fws_macdesc_state_indicate(struct brcmf_fws_info *fws,
1034 u8 type, u8 *data)
1035{
1036 struct brcmf_fws_mac_descriptor *entry;
1037 u8 mac_handle;
c6a681ab 1038 int ret;
33753d47
AS		 1039
1040 mac_handle = data[0];
1041 entry = &fws->desc.nodes[mac_handle & 0x1F];
1042 if (!entry->occupied) {
1043 fws->stats.mac_ps_update_failed++;
1044 return -ESRCH;
1045 }
3f4f910f 1046 brcmf_fws_lock(fws);
c7773fc1 1047 /* a state update should wipe old credits */
33753d47 1048 entry->requested_credit = 0;
c7773fc1 1049 entry->requested_packet = 0;
33753d47
AS		 1050 if (type == BRCMF_FWS_TYPE_MAC_OPEN) {
1051 entry->state = BRCMF_FWS_STATE_OPEN;
c6a681ab 1052 ret = BRCMF_FWS_RET_OK_SCHEDULE;
33753d47
AS		 1053 } else {
1054 entry->state = BRCMF_FWS_STATE_CLOSE;
c7773fc1
AS		 1055 brcmf_fws_tim_update(fws, entry, BRCMF_FWS_FIFO_AC_BK, false);
1056 brcmf_fws_tim_update(fws, entry, BRCMF_FWS_FIFO_AC_BE, false);
1057 brcmf_fws_tim_update(fws, entry, BRCMF_FWS_FIFO_AC_VI, false);
1058 brcmf_fws_tim_update(fws, entry, BRCMF_FWS_FIFO_AC_VO, true);
c6a681ab 1059 ret = BRCMF_FWS_RET_OK_NOSCHEDULE;
33753d47 1060 }
3f4f910f 1061 brcmf_fws_unlock(fws);
c6a681ab 1062 return ret;
33753d47
AS		 1063}
1064
1065static int brcmf_fws_interface_state_indicate(struct brcmf_fws_info *fws,
1066 u8 type, u8 *data)
1067{
1068 struct brcmf_fws_mac_descriptor *entry;
1069 u8 ifidx;
1070 int ret;
1071
1072 ifidx = data[0];
1073
33753d47
AS		 1074 if (ifidx >= BRCMF_MAX_IFS) {
1075 ret = -ERANGE;
1076 goto fail;
1077 }
1078
1079 entry = &fws->desc.iface[ifidx];
1080 if (!entry->occupied) {
1081 ret = -ESRCH;
1082 goto fail;
1083 }
1084
8071fd61
AS		 1085 brcmf_dbg(TRACE, "%s (%d): %s\n", brcmf_fws_get_tlv_name(type), type,
1086 entry->name);
3f4f910f 1087 brcmf_fws_lock(fws);
33753d47
AS		 1088 switch (type) {
1089 case BRCMF_FWS_TYPE_INTERFACE_OPEN:
1090 entry->state = BRCMF_FWS_STATE_OPEN;
c6a681ab
AS		 1091 ret = BRCMF_FWS_RET_OK_SCHEDULE;
1092 break;
33753d47
AS		 1093 case BRCMF_FWS_TYPE_INTERFACE_CLOSE:
1094 entry->state = BRCMF_FWS_STATE_CLOSE;
c6a681ab
AS		 1095 ret = BRCMF_FWS_RET_OK_NOSCHEDULE;
1096 break;
33753d47
AS		 1097 default:
1098 ret = -EINVAL;
3f4f910f 1099 brcmf_fws_unlock(fws);
c6a681ab 1100 goto fail;
33753d47 1101 }
3f4f910f 1102 brcmf_fws_unlock(fws);
c6a681ab
AS		 1103 return ret;
1104
33753d47
AS		 1105fail:
1106 fws->stats.if_update_failed++;
1107 return ret;
1108}
1109
5f38b683
AS		 1110static int brcmf_fws_request_indicate(struct brcmf_fws_info *fws, u8 type,
1111 u8 *data)
1112{
1113 struct brcmf_fws_mac_descriptor *entry;
1114
1115 entry = &fws->desc.nodes[data[1] & 0x1F];
1116 if (!entry->occupied) {
1117 if (type == BRCMF_FWS_TYPE_MAC_REQUEST_CREDIT)
1118 fws->stats.credit_request_failed++;
1119 else
1120 fws->stats.packet_request_failed++;
1121 return -ESRCH;
1122 }
1123
8071fd61
AS		 1124 brcmf_dbg(TRACE, "%s (%d): %s cnt %d bmp %d\n",
1125 brcmf_fws_get_tlv_name(type), type, entry->name,
1126 data[0], data[2]);
3f4f910f 1127 brcmf_fws_lock(fws);
5f38b683
AS		 1128 if (type == BRCMF_FWS_TYPE_MAC_REQUEST_CREDIT)
1129 entry->requested_credit = data[0];
1130 else
1131 entry->requested_packet = data[0];
1132
1133 entry->ac_bitmap = data[2];
3f4f910f 1134 brcmf_fws_unlock(fws);
a5e9d805 1135 return BRCMF_FWS_RET_OK_SCHEDULE;
5f38b683
AS		 1136}
1137
fa587d4b
HM		 1138static void
1139brcmf_fws_macdesc_use_req_credit(struct brcmf_fws_mac_descriptor *entry,
1140 struct sk_buff *skb)
289ec1c7 1141{
fa587d4b
HM		 1142 if (entry->requested_credit > 0) {
1143 entry->requested_credit--;
1144 brcmf_skb_if_flags_set_field(skb, REQUESTED, 1);
1145 brcmf_skb_if_flags_set_field(skb, REQ_CREDIT, 1);
1146 if (entry->state != BRCMF_FWS_STATE_CLOSE)
1147 brcmf_err("requested credit set while mac not closed!\n");
1148 } else if (entry->requested_packet > 0) {
1149 entry->requested_packet--;
1150 brcmf_skb_if_flags_set_field(skb, REQUESTED, 1);
1151 brcmf_skb_if_flags_set_field(skb, REQ_CREDIT, 0);
1152 if (entry->state != BRCMF_FWS_STATE_CLOSE)
1153 brcmf_err("requested packet set while mac not closed!\n");
289ec1c7 1154 } else {
fa587d4b
HM		 1155 brcmf_skb_if_flags_set_field(skb, REQUESTED, 0);
1156 brcmf_skb_if_flags_set_field(skb, REQ_CREDIT, 0);
289ec1c7 1157 }
fa587d4b
HM		 1158}
1159
1160static void brcmf_fws_macdesc_return_req_credit(struct sk_buff *skb)
1161{
1162 struct brcmf_fws_mac_descriptor *entry = brcmf_skbcb(skb)->mac;
1163
1164 if ((brcmf_skb_if_flags_get_field(skb, REQ_CREDIT)) &&
1165 (entry->state == BRCMF_FWS_STATE_CLOSE))
1166 entry->requested_credit++;
289ec1c7
AS		 1167}
1168
84bcc0c3
AS		 1169static void brcmf_fws_return_credits(struct brcmf_fws_info *fws,
1170 u8 fifo, u8 credits)
1171{
1aac1e91
AS		 1172 int lender_ac;
1173 int *borrowed;
1174 int *fifo_credit;
1175
84bcc0c3
AS		 1176 if (!credits)
1177 return;
1178
afc3bbfc
HM		 1179 fws->fifo_credit_map |= 1 << fifo;
1180
1aac1e91
AS		 1181 if ((fifo == BRCMF_FWS_FIFO_AC_BE) &&
1182 (fws->credits_borrowed[0])) {
1183 for (lender_ac = BRCMF_FWS_FIFO_AC_VO; lender_ac >= 0;
1184 lender_ac--) {
1185 borrowed = &fws->credits_borrowed[lender_ac];
1186 if (*borrowed) {
1187 fws->fifo_credit_map |= (1 << lender_ac);
1188 fifo_credit = &fws->fifo_credit[lender_ac];
1189 if (*borrowed >= credits) {
1190 *borrowed -= credits;
1191 *fifo_credit += credits;
1192 return;
1193 } else {
1194 credits -= *borrowed;
1195 *fifo_credit += *borrowed;
1196 *borrowed = 0;
1197 }
1198 }
1199 }
1200 }
1201
84bcc0c3
AS		 1202 fws->fifo_credit[fifo] += credits;
1203}
1204
1205static void brcmf_fws_schedule_deq(struct brcmf_fws_info *fws)
1206{
1207 /* only schedule dequeue when there are credits for delayed traffic */
0a4254be
HM		 1208 if ((fws->fifo_credit_map & fws->fifo_delay_map) ||
1209 (!brcmf_fws_fc_active(fws) && fws->fifo_delay_map))
84bcc0c3
AS		 1210 queue_work(fws->fws_wq, &fws->fws_dequeue_work);
1211}
1212
84bcc0c3
AS		 1213static int brcmf_fws_enq(struct brcmf_fws_info *fws,
1214 enum brcmf_fws_skb_state state, int fifo,
1215 struct sk_buff *p)
1216{
1217 int prec = 2 * fifo;
1218 u32 *qfull_stat = &fws->stats.delayq_full_error;
84bcc0c3 1219 struct brcmf_fws_mac_descriptor *entry;
1e86d696
HM		 1220 struct pktq *pq;
1221 struct sk_buff_head *queue;
1222 struct sk_buff *p_head;
1223 struct sk_buff *p_tail;
1224 u32 fr_new;
1225 u32 fr_compare;
84bcc0c3
AS		 1226
1227 entry = brcmf_skbcb(p)->mac;
1228 if (entry == NULL) {
1229 brcmf_err("no mac descriptor found for skb %p\n", p);
1230 return -ENOENT;
1231 }
1232
8071fd61 1233 brcmf_dbg(DATA, "enter: fifo %d skb %p\n", fifo, p);
84bcc0c3
AS		 1234 if (state == BRCMF_FWS_SKBSTATE_SUPPRESSED) {
1235 prec += 1;
1236 qfull_stat = &fws->stats.supprq_full_error;
84bcc0c3 1237
1e86d696
HM		 1238 /* Fix out of order delivery of frames. Dont assume frame */
1239 /* can be inserted at the end, but look for correct position */
1240 pq = &entry->psq;
1241 if (pktq_full(pq) || pktq_pfull(pq, prec)) {
1242 *qfull_stat += 1;
1243 return -ENFILE;
1244 }
1245 queue = &pq->q[prec].skblist;
1246
1247 p_head = skb_peek(queue);
1248 p_tail = skb_peek_tail(queue);
1249 fr_new = brcmf_skb_htod_tag_get_field(p, FREERUN);
1250
1251 while (p_head != p_tail) {
1252 fr_compare = brcmf_skb_htod_tag_get_field(p_tail,
1253 FREERUN);
1254 /* be sure to handle wrap of 256 */
1255 if (((fr_new > fr_compare) &&
1256 ((fr_new - fr_compare) < 128)) ||
1257 ((fr_new < fr_compare) &&
1258 ((fr_compare - fr_new) > 128)))
1259 break;
1260 p_tail = skb_queue_prev(queue, p_tail);
1261 }
1262 /* Position found. Determine what to do */
1263 if (p_tail == NULL) {
1264 /* empty list */
1265 __skb_queue_tail(queue, p);
1266 } else {
1267 fr_compare = brcmf_skb_htod_tag_get_field(p_tail,
1268 FREERUN);
1269 if (((fr_new > fr_compare) &&
1270 ((fr_new - fr_compare) < 128)) ||
1271 ((fr_new < fr_compare) &&
1272 ((fr_compare - fr_new) > 128))) {
1273 /* After tail */
1274 __skb_queue_after(queue, p_tail, p);
1275 } else {
1276 /* Before tail */
1277 __skb_insert(p, p_tail->prev, p_tail, queue);
1278 }
1279 }
1280
1281 /* Complete the counters and statistics */
1282 pq->len++;
1283 if (pq->hi_prec < prec)
1284 pq->hi_prec = (u8) prec;
1285 } else if (brcmu_pktq_penq(&entry->psq, prec, p) == NULL) {
84bcc0c3
AS		 1286 *qfull_stat += 1;
1287 return -ENFILE;
1288 }
1289
1290 /* increment total enqueued packet count */
1291 fws->fifo_delay_map |= 1 << fifo;
1292 fws->fifo_enqpkt[fifo]++;
1293
1294 /* update the sk_buff state */
1295 brcmf_skbcb(p)->state = state;
84bcc0c3
AS		 1296
1297 /*
1298 * A packet has been pushed so update traffic
1299 * availability bitmap, if applicable
1300 */
c7773fc1 1301 brcmf_fws_tim_update(fws, entry, fifo, true);
84bcc0c3
AS		 1302 brcmf_fws_flow_control_check(fws, &entry->psq,
1303 brcmf_skb_if_flags_get_field(p, INDEX));
1304 return 0;
1305}
1306
1307static struct sk_buff *brcmf_fws_deq(struct brcmf_fws_info *fws, int fifo)
1308{
1309 struct brcmf_fws_mac_descriptor *table;
1310 struct brcmf_fws_mac_descriptor *entry;
1311 struct sk_buff *p;
84bcc0c3
AS		 1312 int num_nodes;
1313 int node_pos;
1314 int prec_out;
07529d20 1315 int pmsk;
84bcc0c3
AS		 1316 int i;
1317
1318 table = (struct brcmf_fws_mac_descriptor *)&fws->desc;
1319 num_nodes = sizeof(fws->desc) / sizeof(struct brcmf_fws_mac_descriptor);
1320 node_pos = fws->deq_node_pos[fifo];
1321
1322 for (i = 0; i < num_nodes; i++) {
1323 entry = &table[(node_pos + i) % num_nodes];
b75c1a30 1324 if (!entry->occupied ||
1ab083a3 1325 brcmf_fws_macdesc_closed(fws, entry, fifo))
84bcc0c3
AS		 1326 continue;
1327
1328 if (entry->suppressed)
1329 pmsk = 2;
07529d20
AS		 1330 else
1331 pmsk = 3;
84bcc0c3
AS		 1332 p = brcmu_pktq_mdeq(&entry->psq, pmsk << (fifo * 2), &prec_out);
1333 if (p == NULL) {
1334 if (entry->suppressed) {
8c5140f6
HM		 1335 if (entry->suppr_transit_count)
1336 continue;
84bcc0c3
AS		 1337 entry->suppressed = false;
1338 p = brcmu_pktq_mdeq(&entry->psq,
1339 1 << (fifo * 2), &prec_out);
1340 }
1341 }
1342 if (p == NULL)
1343 continue;
1344
fa587d4b 1345 brcmf_fws_macdesc_use_req_credit(entry, p);
84bcc0c3
AS		 1346
1347 /* move dequeue position to ensure fair round-robin */
1348 fws->deq_node_pos[fifo] = (node_pos + i + 1) % num_nodes;
1349 brcmf_fws_flow_control_check(fws, &entry->psq,
1350 brcmf_skb_if_flags_get_field(p,
1351 INDEX)
1352 );
1353 /*
1354 * A packet has been picked up, update traffic
1355 * availability bitmap, if applicable
1356 */
c7773fc1 1357 brcmf_fws_tim_update(fws, entry, fifo, false);
84bcc0c3
AS		 1358
1359 /*
1360 * decrement total enqueued fifo packets and
1361 * clear delay bitmap if done.
1362 */
1363 fws->fifo_enqpkt[fifo]--;
1364 if (fws->fifo_enqpkt[fifo] == 0)
1365 fws->fifo_delay_map &= ~(1 << fifo);
1366 goto done;
1367 }
1368 p = NULL;
1369done:
8071fd61 1370 brcmf_dbg(DATA, "exit: fifo %d skb %p\n", fifo, p);
84bcc0c3
AS		 1371 return p;
1372}
1373
1374static int brcmf_fws_txstatus_suppressed(struct brcmf_fws_info *fws, int fifo,
1e86d696
HM		 1375 struct sk_buff *skb, u32 genbit,
1376 u16 seq)
84bcc0c3
AS		 1377{
1378 struct brcmf_fws_mac_descriptor *entry = brcmf_skbcb(skb)->mac;
1379 u32 hslot;
1380 int ret;
2747e5f7 1381 u8 ifidx;
84bcc0c3
AS		 1382
1383 hslot = brcmf_skb_htod_tag_get_field(skb, HSLOT);
1384
1385 /* this packet was suppressed */
be4910ad 1386 if (!entry->suppressed) {
84bcc0c3 1387 entry->suppressed = true;
84bcc0c3 1388 entry->suppr_transit_count = entry->transit_count;
8c5140f6
HM		 1389 brcmf_dbg(DATA, "suppress %s: transit %d\n",
1390 entry->name, entry->transit_count);
84bcc0c3
AS		 1391 }
1392
1393 entry->generation = genbit;
1394
2747e5f7
HM		 1395 ret = brcmf_proto_hdrpull(fws->drvr, false, &ifidx, skb);
1396 if (ret == 0)
1e86d696
HM		 1397 brcmf_skb_htod_tag_set_field(skb, GENERATION, genbit);
1398 brcmf_skbcb(skb)->htod_seq = seq;
1399 if (brcmf_skb_htod_seq_get_field(skb, FROMFW)) {
1400 brcmf_skb_htod_seq_set_field(skb, FROMDRV, 1);
1401 brcmf_skb_htod_seq_set_field(skb, FROMFW, 0);
1402 } else {
1403 brcmf_skb_htod_seq_set_field(skb, FROMDRV, 0);
1404 }
2747e5f7
HM		 1405 ret = brcmf_fws_enq(fws, BRCMF_FWS_SKBSTATE_SUPPRESSED, fifo,
1406 skb);
84bcc0c3 1407 if (ret != 0) {
2747e5f7 1408 /* suppress q is full or hdrpull failed, drop this packet */
84bcc0c3
AS		 1409 brcmf_fws_hanger_poppkt(&fws->hanger, hslot, &skb,
1410 true);
1411 } else {
1412 /*
1413 * Mark suppressed to avoid a double free during
1414 * wlfc cleanup
1415 */
be4910ad 1416 brcmf_fws_hanger_mark_suppressed(&fws->hanger, hslot);
84bcc0c3
AS		 1417 }
1418
1419 return ret;
1420}
1421
3edc1cff 1422static int
8071fd61 1423brcmf_fws_txs_process(struct brcmf_fws_info *fws, u8 flags, u32 hslot,
1e86d696 1424 u32 genbit, u16 seq)
3edc1cff 1425{
84bcc0c3 1426 u32 fifo;
3edc1cff 1427 int ret;
84bcc0c3 1428 bool remove_from_hanger = true;
3edc1cff 1429 struct sk_buff *skb;
8071fd61 1430 struct brcmf_skbuff_cb *skcb;
3edc1cff
AS		 1431 struct brcmf_fws_mac_descriptor *entry = NULL;
1432
8071fd61 1433 brcmf_dbg(DATA, "flags %d\n", flags);
3edc1cff
AS		 1434
1435 if (flags == BRCMF_FWS_TXSTATUS_DISCARD)
1436 fws->stats.txs_discard++;
84bcc0c3
AS		 1437 else if (flags == BRCMF_FWS_TXSTATUS_CORE_SUPPRESS) {
1438 fws->stats.txs_supp_core++;
1439 remove_from_hanger = false;
1440 } else if (flags == BRCMF_FWS_TXSTATUS_FW_PS_SUPPRESS) {
1441 fws->stats.txs_supp_ps++;
1442 remove_from_hanger = false;
5631becb 1443 } else if (flags == BRCMF_FWS_TXSTATUS_FW_TOSSED)
3edc1cff 1444 fws->stats.txs_tossed++;
5631becb
AS		 1445 else if (flags == BRCMF_FWS_TXSTATUS_HOST_TOSSED)
1446 fws->stats.txs_host_tossed++;
3edc1cff
AS		 1447 else
1448 brcmf_err("unexpected txstatus\n");
1449
1450 ret = brcmf_fws_hanger_poppkt(&fws->hanger, hslot, &skb,
84bcc0c3 1451 remove_from_hanger);
3edc1cff
AS		 1452 if (ret != 0) {
1453 brcmf_err("no packet in hanger slot: hslot=%d\n", hslot);
1454 return ret;
1455 }
1456
8071fd61
AS		 1457 skcb = brcmf_skbcb(skb);
1458 entry = skcb->mac;
3edc1cff 1459 if (WARN_ON(!entry)) {
84bcc0c3
AS		 1460 brcmu_pkt_buf_free_skb(skb);
1461 return -EINVAL;
3edc1cff 1462 }
8c5140f6
HM		 1463 entry->transit_count--;
1464 if (entry->suppressed && entry->suppr_transit_count)
1465 entry->suppr_transit_count--;
3edc1cff 1466
1e86d696
HM		 1467 brcmf_dbg(DATA, "%s flags %d htod %X seq %X\n", entry->name, flags,
1468 skcb->htod, seq);
8071fd61 1469
84bcc0c3
AS		 1470 /* pick up the implicit credit from this packet */
1471 fifo = brcmf_skb_htod_tag_get_field(skb, FIFO);
fa587d4b
HM		 1472 if ((fws->fcmode == BRCMF_FWS_FCMODE_IMPLIED_CREDIT) ||
1473 (brcmf_skb_if_flags_get_field(skb, REQ_CREDIT)) ||
1474 (flags == BRCMF_FWS_TXSTATUS_HOST_TOSSED)) {
1475 brcmf_fws_return_credits(fws, fifo, 1);
1476 brcmf_fws_schedule_deq(fws);
1477 }
1478 brcmf_fws_macdesc_return_req_credit(skb);
3edc1cff 1479
84bcc0c3 1480 if (!remove_from_hanger)
1e86d696
HM		 1481 ret = brcmf_fws_txstatus_suppressed(fws, fifo, skb, genbit,
1482 seq);
84bcc0c3 1483
8c5140f6 1484 if (remove_from_hanger || ret)
84bcc0c3 1485 brcmf_txfinalize(fws->drvr, skb, true);
8c5140f6 1486
84bcc0c3
AS		 1487 return 0;
1488}
1489
1490static int brcmf_fws_fifocreditback_indicate(struct brcmf_fws_info *fws,
1491 u8 *data)
1492{
1493 int i;
1494
1495 if (fws->fcmode != BRCMF_FWS_FCMODE_EXPLICIT_CREDIT) {
1496 brcmf_dbg(INFO, "ignored\n");
a5e9d805 1497 return BRCMF_FWS_RET_OK_NOSCHEDULE;
84bcc0c3
AS		 1498 }
1499
8071fd61 1500 brcmf_dbg(DATA, "enter: data %pM\n", data);
3f4f910f 1501 brcmf_fws_lock(fws);
84bcc0c3
AS		 1502 for (i = 0; i < BRCMF_FWS_FIFO_COUNT; i++)
1503 brcmf_fws_return_credits(fws, i, data[i]);
1504
8071fd61 1505 brcmf_dbg(DATA, "map: credit %x delay %x\n", fws->fifo_credit_map,
84bcc0c3 1506 fws->fifo_delay_map);
3f4f910f 1507 brcmf_fws_unlock(fws);
a5e9d805 1508 return BRCMF_FWS_RET_OK_SCHEDULE;
3edc1cff
AS		 1509}
1510
0f8b5cc5
AS		 1511static int brcmf_fws_txstatus_indicate(struct brcmf_fws_info *fws, u8 *data)
1512{
a2ffc566 1513 __le32 status_le;
1e86d696 1514 __le16 seq_le;
0f8b5cc5
AS		 1515 u32 status;
1516 u32 hslot;
84bcc0c3 1517 u32 genbit;
0f8b5cc5 1518 u8 flags;
1e86d696 1519 u16 seq;
0f8b5cc5
AS		 1520
1521 fws->stats.txs_indicate++;
a2ffc566
AS		 1522 memcpy(&status_le, data, sizeof(status_le));
1523 status = le32_to_cpu(status_le);
0f8b5cc5
AS		 1524 flags = brcmf_txstatus_get_field(status, FLAGS);
1525 hslot = brcmf_txstatus_get_field(status, HSLOT);
84bcc0c3 1526 genbit = brcmf_txstatus_get_field(status, GENERATION);
1e86d696
HM		 1527 if (BRCMF_FWS_MODE_GET_REUSESEQ(fws->mode)) {
1528 memcpy(&seq_le, &data[BRCMF_FWS_TYPE_PKTTAG_LEN],
1529 sizeof(seq_le));
1530 seq = le16_to_cpu(seq_le);
1531 } else {
1532 seq = 0;
1533 }
0f8b5cc5 1534
3f4f910f 1535 brcmf_fws_lock(fws);
1e86d696 1536 brcmf_fws_txs_process(fws, flags, hslot, genbit, seq);
3f4f910f 1537 brcmf_fws_unlock(fws);
c6a681ab 1538 return BRCMF_FWS_RET_OK_NOSCHEDULE;
0f8b5cc5
AS		 1539}
1540
349e7104
AS		 1541static int brcmf_fws_dbg_seqnum_check(struct brcmf_fws_info *fws, u8 *data)
1542{
1543 __le32 timestamp;
1544
1545 memcpy(&timestamp, &data[2], sizeof(timestamp));
8071fd61 1546 brcmf_dbg(CTL, "received: seq %d, timestamp %d\n", data[1],
349e7104
AS		 1547 le32_to_cpu(timestamp));
1548 return 0;
1549}
1550
43fa635e
AS		 1551static int brcmf_fws_notify_credit_map(struct brcmf_if *ifp,
1552 const struct brcmf_event_msg *e,
1553 void *data)
1554{
1555 struct brcmf_fws_info *fws = ifp->drvr->fws;
1556 int i;
43fa635e
AS		 1557 u8 *credits = data;
1558
84bcc0c3
AS		 1559 if (e->datalen < BRCMF_FWS_FIFO_COUNT) {
1560 brcmf_err("event payload too small (%d)\n", e->datalen);
1561 return -EINVAL;
1562 }
0d24b0ea
HM		 1563 if (fws->creditmap_received)
1564 return 0;
1565
1566 fws->creditmap_received = true;
84bcc0c3
AS		 1567
1568 brcmf_dbg(TRACE, "enter: credits %pM\n", credits);
3f4f910f 1569 brcmf_fws_lock(fws);
84bcc0c3
AS		 1570 for (i = 0; i < ARRAY_SIZE(fws->fifo_credit); i++) {
1571 if (*credits)
1572 fws->fifo_credit_map |= 1 << i;
1573 else
1574 fws->fifo_credit_map &= ~(1 << i);
43fa635e 1575 fws->fifo_credit[i] = *credits++;
84bcc0c3
AS		 1576 }
1577 brcmf_fws_schedule_deq(fws);
3f4f910f 1578 brcmf_fws_unlock(fws);
43fa635e
AS		 1579 return 0;
1580}
1581
7d747037
HM		 1582static int brcmf_fws_notify_bcmc_credit_support(struct brcmf_if *ifp,
1583 const struct brcmf_event_msg *e,
1584 void *data)
1585{
1586 struct brcmf_fws_info *fws = ifp->drvr->fws;
7d747037 1587
3f4f910f 1588 brcmf_fws_lock(fws);
7d747037
HM		 1589 if (fws)
1590 fws->bcmc_credit_check = true;
3f4f910f 1591 brcmf_fws_unlock(fws);
7d747037
HM		 1592 return 0;
1593}
1594
349e7104
AS		 1595int brcmf_fws_hdrpull(struct brcmf_pub *drvr, int ifidx, s16 signal_len,
1596 struct sk_buff *skb)
1597{
87edd891 1598 struct brcmf_skb_reorder_data *rd;
349e7104 1599 struct brcmf_fws_info *fws = drvr->fws;
349e7104
AS		 1600 u8 *signal_data;
1601 s16 data_len;
1602 u8 type;
1603 u8 len;
1604 u8 *data;
a5e9d805
AS		 1605 s32 status;
1606 s32 err;
349e7104 1607
8071fd61 1608 brcmf_dbg(HDRS, "enter: ifidx %d, skblen %u, sig %d\n",
349e7104
AS		 1609 ifidx, skb->len, signal_len);
1610
1611 WARN_ON(signal_len > skb->len);
1612
0a4254be
HM		 1613 if (!signal_len)
1614 return 0;
349e7104 1615 /* if flow control disabled, skip to packet data and leave */
0a4254be 1616 if (!fws->fw_signals) {
349e7104
AS		 1617 skb_pull(skb, signal_len);
1618 return 0;
1619 }
1620
349e7104
AS		 1621 fws->stats.header_pulls++;
1622 data_len = signal_len;
1623 signal_data = skb->data;
1624
a5e9d805 1625 status = BRCMF_FWS_RET_OK_NOSCHEDULE;
349e7104
AS		 1626 while (data_len > 0) {
1627 /* extract tlv info */
1628 type = signal_data[0];
1629
1630 /* FILLER type is actually not a TLV, but
1631 * a single byte that can be skipped.
1632 */
1633 if (type == BRCMF_FWS_TYPE_FILLER) {
1634 signal_data += 1;
1635 data_len -= 1;
1636 continue;
1637 }
1638 len = signal_data[1];
1639 data = signal_data + 2;
1640
8071fd61
AS		 1641 brcmf_dbg(HDRS, "tlv type=%s (%d), len=%d (%d)\n",
1642 brcmf_fws_get_tlv_name(type), type, len,
1643 brcmf_fws_get_tlv_len(fws, type));
2af15580 1644
349e7104
AS		 1645 /* abort parsing when length invalid */
1646 if (data_len < len + 2)
1647 break;
1648
f55d94a6 1649 if (len < brcmf_fws_get_tlv_len(fws, type))
bb8c8063
AS		 1650 break;
1651
a5e9d805 1652 err = BRCMF_FWS_RET_OK_NOSCHEDULE;
349e7104 1653 switch (type) {
bb8c8063 1654 case BRCMF_FWS_TYPE_COMP_TXSTATUS:
ce814c1b 1655 break;
87edd891
AS		 1656 case BRCMF_FWS_TYPE_HOST_REORDER_RXPKTS:
1657 rd = (struct brcmf_skb_reorder_data *)skb->cb;
1658 rd->reorder = data;
1659 break;
bb8c8063
AS		 1660 case BRCMF_FWS_TYPE_MACDESC_ADD:
1661 case BRCMF_FWS_TYPE_MACDESC_DEL:
ce814c1b 1662 brcmf_fws_macdesc_indicate(fws, type, data);
bb8c8063 1663 break;
33753d47
AS		 1664 case BRCMF_FWS_TYPE_MAC_OPEN:
1665 case BRCMF_FWS_TYPE_MAC_CLOSE:
a5e9d805 1666 err = brcmf_fws_macdesc_state_indicate(fws, type, data);
33753d47
AS		 1667 break;
1668 case BRCMF_FWS_TYPE_INTERFACE_OPEN:
1669 case BRCMF_FWS_TYPE_INTERFACE_CLOSE:
a5e9d805
AS		 1670 err = brcmf_fws_interface_state_indicate(fws, type,
1671 data);
33753d47 1672 break;
5f38b683
AS		 1673 case BRCMF_FWS_TYPE_MAC_REQUEST_CREDIT:
1674 case BRCMF_FWS_TYPE_MAC_REQUEST_PACKET:
a5e9d805 1675 err = brcmf_fws_request_indicate(fws, type, data);
5f38b683 1676 break;
3edc1cff
AS		 1677 case BRCMF_FWS_TYPE_TXSTATUS:
1678 brcmf_fws_txstatus_indicate(fws, data);
1679 break;
84bcc0c3 1680 case BRCMF_FWS_TYPE_FIFO_CREDITBACK:
a5e9d805 1681 err = brcmf_fws_fifocreditback_indicate(fws, data);
84bcc0c3 1682 break;
bb8c8063
AS		 1683 case BRCMF_FWS_TYPE_RSSI:
1684 brcmf_fws_rssi_indicate(fws, *data);
349e7104
AS		 1685 break;
1686 case BRCMF_FWS_TYPE_TRANS_ID:
349e7104
AS		 1687 brcmf_fws_dbg_seqnum_check(fws, data);
1688 break;
84bcc0c3
AS		 1689 case BRCMF_FWS_TYPE_PKTTAG:
1690 case BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP:
349e7104
AS		 1691 default:
1692 fws->stats.tlv_invalid_type++;
1693 break;
1694 }
a5e9d805
AS		 1695 if (err == BRCMF_FWS_RET_OK_SCHEDULE)
1696 status = BRCMF_FWS_RET_OK_SCHEDULE;
349e7104
AS		 1697 signal_data += len + 2;
1698 data_len -= len + 2;
1699 }
1700
1701 if (data_len != 0)
1702 fws->stats.tlv_parse_failed++;
1703
a5e9d805
AS		 1704 if (status == BRCMF_FWS_RET_OK_SCHEDULE)
1705 brcmf_fws_schedule_deq(fws);
1706
349e7104
AS		 1707 /* signalling processing result does
1708 * not affect the actual ethernet packet.
1709 */
1710 skb_pull(skb, signal_len);
1711
1712 /* this may be a signal-only packet
1713 */
1714 if (skb->len == 0)
1715 fws->stats.header_only_pkt++;
1716
349e7104
AS		 1717 return 0;
1718}
bb8c8063 1719
456d0685 1720static void brcmf_fws_precommit_skb(struct brcmf_fws_info *fws, int fifo,
3edc1cff
AS		 1721 struct sk_buff *p)
1722{
1723 struct brcmf_skbuff_cb *skcb = brcmf_skbcb(p);
1724 struct brcmf_fws_mac_descriptor *entry = skcb->mac;
3edc1cff
AS		 1725 u8 flags;
1726
1e86d696
HM		 1727 if (skcb->state != BRCMF_FWS_SKBSTATE_SUPPRESSED)
1728 brcmf_skb_htod_tag_set_field(p, GENERATION, entry->generation);
be4910ad 1729 flags = BRCMF_FWS_HTOD_FLAG_PKTFROMHOST;
fa587d4b 1730 if (brcmf_skb_if_flags_get_field(p, REQUESTED)) {
be4910ad
HM		 1731 /*
1732 * Indicate that this packet is being sent in response to an
1733 * explicit request from the firmware side.
1734 */
1735 flags |= BRCMF_FWS_HTOD_FLAG_PKT_REQUESTED;
1736 }
1737 brcmf_skb_htod_tag_set_field(p, FLAGS, flags);
456d0685 1738 brcmf_fws_hdrpush(fws, p);
3edc1cff
AS		 1739}
1740
456d0685
AS		 1741static void brcmf_fws_rollback_toq(struct brcmf_fws_info *fws,
1742 struct sk_buff *skb, int fifo)
84bcc0c3 1743{
84bcc0c3 1744 struct brcmf_fws_mac_descriptor *entry;
84bcc0c3 1745 struct sk_buff *pktout;
456d0685 1746 int qidx, hslot;
84bcc0c3 1747 int rc = 0;
84bcc0c3 1748
84bcc0c3 1749 entry = brcmf_skbcb(skb)->mac;
456d0685
AS		 1750 if (entry->occupied) {
1751 qidx = 2 * fifo;
1752 if (brcmf_skbcb(skb)->state == BRCMF_FWS_SKBSTATE_SUPPRESSED)
1753 qidx++;
1754
1755 pktout = brcmu_pktq_penq_head(&entry->psq, qidx, skb);
1756 if (pktout == NULL) {
1757 brcmf_err("%s queue %d full\n", entry->name, qidx);
1758 rc = -ENOSPC;
84bcc0c3 1759 }
84bcc0c3 1760 } else {
456d0685 1761 brcmf_err("%s entry removed\n", entry->name);
84bcc0c3
AS		 1762 rc = -ENOENT;
1763 }
1764
67994fa2 1765 if (rc) {
84bcc0c3 1766 fws->stats.rollback_failed++;
456d0685 1767 hslot = brcmf_skb_htod_tag_get_field(skb, HSLOT);
fa587d4b 1768 brcmf_fws_txs_process(fws, BRCMF_FWS_TXSTATUS_HOST_TOSSED,
1e86d696 1769 hslot, 0, 0);
289ec1c7 1770 } else {
84bcc0c3 1771 fws->stats.rollback_success++;
fa587d4b
HM		 1772 brcmf_fws_return_credits(fws, fifo, 1);
1773 brcmf_fws_macdesc_return_req_credit(skb);
289ec1c7 1774 }
84bcc0c3
AS		 1775}
1776
1aac1e91
AS		 1777static int brcmf_fws_borrow_credit(struct brcmf_fws_info *fws)
1778{
1779 int lender_ac;
1780
afc3bbfc
HM		 1781 if (time_after(fws->borrow_defer_timestamp, jiffies)) {
1782 fws->fifo_credit_map &= ~(1 << BRCMF_FWS_FIFO_AC_BE);
1aac1e91 1783 return -ENAVAIL;
afc3bbfc 1784 }
1aac1e91
AS		 1785
1786 for (lender_ac = 0; lender_ac <= BRCMF_FWS_FIFO_AC_VO; lender_ac++) {
1787 if (fws->fifo_credit[lender_ac]) {
1788 fws->credits_borrowed[lender_ac]++;
1789 fws->fifo_credit[lender_ac]--;
1790 if (fws->fifo_credit[lender_ac] == 0)
1791 fws->fifo_credit_map &= ~(1 << lender_ac);
afc3bbfc 1792 fws->fifo_credit_map |= (1 << BRCMF_FWS_FIFO_AC_BE);
8071fd61 1793 brcmf_dbg(DATA, "borrow credit from: %d\n", lender_ac);
1aac1e91
AS		 1794 return 0;
1795 }
1796 }
afc3bbfc 1797 fws->fifo_credit_map &= ~(1 << BRCMF_FWS_FIFO_AC_BE);
1aac1e91
AS		 1798 return -ENAVAIL;
1799}
1800
3edc1cff
AS		 1801static int brcmf_fws_commit_skb(struct brcmf_fws_info *fws, int fifo,
1802 struct sk_buff *skb)
1803{
1804 struct brcmf_skbuff_cb *skcb = brcmf_skbcb(skb);
1805 struct brcmf_fws_mac_descriptor *entry;
1806 struct brcmf_bus *bus = fws->drvr->bus_if;
1807 int rc;
2747e5f7 1808 u8 ifidx;
3edc1cff
AS		 1809
1810 entry = skcb->mac;
1811 if (IS_ERR(entry))
1812 return PTR_ERR(entry);
1813
456d0685 1814 brcmf_fws_precommit_skb(fws, fifo, skb);
3f4f910f
HM		 1815 entry->transit_count++;
1816 if (entry->suppressed)
1817 entry->suppr_transit_count++;
1818 brcmf_fws_unlock(fws);
3edc1cff 1819 rc = brcmf_bus_txdata(bus, skb);
3f4f910f 1820 brcmf_fws_lock(fws);
456d0685
AS		 1821 brcmf_dbg(DATA, "%s flags %X htod %X bus_tx %d\n", entry->name,
1822 skcb->if_flags, skcb->htod, rc);
2747e5f7 1823 if (rc < 0) {
3f4f910f
HM		 1824 entry->transit_count--;
1825 if (entry->suppressed)
1826 entry->suppr_transit_count--;
2747e5f7 1827 brcmf_proto_hdrpull(fws->drvr, false, &ifidx, skb);
84bcc0c3 1828 goto rollback;
2747e5f7 1829 }
3edc1cff 1830
3edc1cff 1831 fws->stats.pkt2bus++;
cf3a6872 1832 fws->stats.send_pkts[fifo]++;
fa587d4b
HM		 1833 if (brcmf_skb_if_flags_get_field(skb, REQUESTED))
1834 fws->stats.requested_sent[fifo]++;
84bcc0c3 1835
3edc1cff
AS		 1836 return rc;
1837
84bcc0c3 1838rollback:
51f6dd9d 1839 brcmf_fws_rollback_toq(fws, skb, fifo);
3edc1cff
AS		 1840 return rc;
1841}
1842
456d0685
AS		 1843static int brcmf_fws_assign_htod(struct brcmf_fws_info *fws, struct sk_buff *p,
1844 int fifo)
1845{
1846 struct brcmf_skbuff_cb *skcb = brcmf_skbcb(p);
1847 int rc, hslot;
1848
1e86d696
HM		 1849 skcb->htod = 0;
1850 skcb->htod_seq = 0;
456d0685
AS		 1851 hslot = brcmf_fws_hanger_get_free_slot(&fws->hanger);
1852 brcmf_skb_htod_tag_set_field(p, HSLOT, hslot);
1853 brcmf_skb_htod_tag_set_field(p, FREERUN, skcb->mac->seq[fifo]);
1854 brcmf_skb_htod_tag_set_field(p, FIFO, fifo);
1855 rc = brcmf_fws_hanger_pushpkt(&fws->hanger, p, hslot);
1856 if (!rc)
1857 skcb->mac->seq[fifo]++;
1858 else
1859 fws->stats.generic_error++;
1860 return rc;
1861}
1862
3edc1cff
AS		 1863int brcmf_fws_process_skb(struct brcmf_if *ifp, struct sk_buff *skb)
1864{
1865 struct brcmf_pub *drvr = ifp->drvr;
1aac1e91 1866 struct brcmf_fws_info *fws = drvr->fws;
3edc1cff
AS		 1867 struct brcmf_skbuff_cb *skcb = brcmf_skbcb(skb);
1868 struct ethhdr *eh = (struct ethhdr *)(skb->data);
3edc1cff
AS		 1869 int fifo = BRCMF_FWS_FIFO_BCMC;
1870 bool multicast = is_multicast_ether_addr(eh->h_dest);
28a905b5 1871 bool pae = eh->h_proto == htons(ETH_P_PAE);
3edc1cff 1872
87edd891 1873 brcmf_dbg(DATA, "tx proto=0x%X\n", ntohs(eh->h_proto));
3edc1cff
AS		 1874 /* determine the priority */
1875 if (!skb->priority)
1876 skb->priority = cfg80211_classify8021d(skb);
1877
1878 drvr->tx_multicast += !!multicast;
28a905b5 1879 if (pae)
3edc1cff
AS		 1880 atomic_inc(&ifp->pend_8021x_cnt);
1881
3edc1cff 1882 /* set control buffer information */
84bcc0c3 1883 skcb->if_flags = 0;
3edc1cff 1884 skcb->state = BRCMF_FWS_SKBSTATE_NEW;
31ed07dc 1885 brcmf_skb_if_flags_set_field(skb, INDEX, ifp->ifidx);
3edc1cff
AS		 1886 if (!multicast)
1887 fifo = brcmf_fws_prio2fifo[skb->priority];
3edc1cff 1888
3f4f910f 1889 brcmf_fws_lock(fws);
20863746
AS		 1890 if (fifo != BRCMF_FWS_FIFO_AC_BE && fifo < BRCMF_FWS_FIFO_BCMC)
1891 fws->borrow_defer_timestamp = jiffies +
1892 BRCMF_FWS_BORROW_DEFER_PERIOD;
456d0685
AS		 1893
1894 skcb->mac = brcmf_fws_macdesc_find(fws, ifp, eh->h_dest);
1895 brcmf_dbg(DATA, "%s mac %pM multi %d fifo %d\n", skcb->mac->name,
1896 eh->h_dest, multicast, fifo);
1897 if (!brcmf_fws_assign_htod(fws, skb, fifo)) {
1898 brcmf_fws_enq(fws, BRCMF_FWS_SKBSTATE_DELAYED, fifo, skb);
1899 brcmf_fws_schedule_deq(fws);
1900 } else {
1901 brcmf_err("drop skb: no hanger slot\n");
28a905b5
AS		 1902 if (pae) {
1903 atomic_dec(&ifp->pend_8021x_cnt);
1904 if (waitqueue_active(&ifp->pend_8021x_wait))
1905 wake_up(&ifp->pend_8021x_wait);
1906 }
456d0685
AS		 1907 brcmu_pkt_buf_free_skb(skb);
1908 }
3f4f910f 1909 brcmf_fws_unlock(fws);
3edc1cff
AS		 1910 return 0;
1911}
1912
bb8c8063
AS		 1913void brcmf_fws_reset_interface(struct brcmf_if *ifp)
1914{
1915 struct brcmf_fws_mac_descriptor *entry = ifp->fws_desc;
1916
1917 brcmf_dbg(TRACE, "enter: idx=%d\n", ifp->bssidx);
1918 if (!entry)
1919 return;
1920
1ab083a3 1921 brcmf_fws_macdesc_init(entry, ifp->mac_addr, ifp->ifidx);
bb8c8063
AS		 1922}
1923
1924void brcmf_fws_add_interface(struct brcmf_if *ifp)
1925{
84bcc0c3 1926 struct brcmf_fws_info *fws = ifp->drvr->fws;
bb8c8063
AS		 1927 struct brcmf_fws_mac_descriptor *entry;
1928
0a4254be 1929 if (!ifp->ndev)
bb8c8063
AS		 1930 return;
1931
84bcc0c3
AS		 1932 entry = &fws->desc.iface[ifp->ifidx];
1933 ifp->fws_desc = entry;
1ab083a3 1934 brcmf_fws_macdesc_init(entry, ifp->mac_addr, ifp->ifidx);
8071fd61 1935 brcmf_fws_macdesc_set_name(fws, entry);
84bcc0c3
AS		 1936 brcmu_pktq_init(&entry->psq, BRCMF_FWS_PSQ_PREC_COUNT,
1937 BRCMF_FWS_PSQ_LEN);
8071fd61 1938 brcmf_dbg(TRACE, "added %s\n", entry->name);
bb8c8063
AS		 1939}
1940
1941void brcmf_fws_del_interface(struct brcmf_if *ifp)
1942{
1943 struct brcmf_fws_mac_descriptor *entry = ifp->fws_desc;
1944
bb8c8063
AS		 1945 if (!entry)
1946 return;
1947
3f4f910f 1948 brcmf_fws_lock(ifp->drvr->fws);
bb8c8063 1949 ifp->fws_desc = NULL;
8071fd61 1950 brcmf_dbg(TRACE, "deleting %s\n", entry->name);
1ab083a3 1951 brcmf_fws_macdesc_deinit(entry);
a3e993c7 1952 brcmf_fws_cleanup(ifp->drvr->fws, ifp->ifidx);
3f4f910f 1953 brcmf_fws_unlock(ifp->drvr->fws);
84bcc0c3
AS		 1954}
1955
1956static void brcmf_fws_dequeue_worker(struct work_struct *worker)
1957{
1958 struct brcmf_fws_info *fws;
0a4254be 1959 struct brcmf_pub *drvr;
84bcc0c3 1960 struct sk_buff *skb;
84bcc0c3 1961 int fifo;
0a4254be
HM		 1962 u32 hslot;
1963 u32 ifidx;
1964 int ret;
84bcc0c3
AS		 1965
1966 fws = container_of(worker, struct brcmf_fws_info, fws_dequeue_work);
0a4254be 1967 drvr = fws->drvr;
84bcc0c3 1968
3f4f910f 1969 brcmf_fws_lock(fws);
2a5d7b02 1970 for (fifo = BRCMF_FWS_FIFO_BCMC; fifo >= 0 && !fws->bus_flow_blocked;
df50f756 1971 fifo--) {
0a4254be
HM		 1972 if (!brcmf_fws_fc_active(fws)) {
1973 while ((skb = brcmf_fws_deq(fws, fifo)) != NULL) {
1974 hslot = brcmf_skb_htod_tag_get_field(skb,
1975 HSLOT);
1976 brcmf_fws_hanger_poppkt(&fws->hanger, hslot,
1977 &skb, true);
1978 ifidx = brcmf_skb_if_flags_get_field(skb,
1979 INDEX);
1980 brcmf_proto_hdrpush(drvr, ifidx, 0, skb);
1981 /* Use bus module to send data frame */
3f4f910f 1982 brcmf_fws_unlock(fws);
0a4254be 1983 ret = brcmf_bus_txdata(drvr->bus_if, skb);
3f4f910f 1984 brcmf_fws_lock(fws);
0a4254be
HM		 1985 if (ret < 0)
1986 brcmf_txfinalize(drvr, skb, false);
1987 if (fws->bus_flow_blocked)
1988 break;
1989 }
1990 continue;
1991 }
7d747037
HM		 1992 while ((fws->fifo_credit[fifo]) || ((!fws->bcmc_credit_check) &&
1993 (fifo == BRCMF_FWS_FIFO_BCMC))) {
84bcc0c3 1994 skb = brcmf_fws_deq(fws, fifo);
289ec1c7 1995 if (!skb)
84bcc0c3 1996 break;
fa587d4b 1997 fws->fifo_credit[fifo]--;
289ec1c7
AS		 1998 if (brcmf_fws_commit_skb(fws, fifo, skb))
1999 break;
df50f756
HM		 2000 if (fws->bus_flow_blocked)
2001 break;
84bcc0c3 2002 }
1aac1e91 2003 if ((fifo == BRCMF_FWS_FIFO_AC_BE) &&
289ec1c7 2004 (fws->fifo_credit[fifo] == 0) &&
df50f756 2005 (!fws->bus_flow_blocked)) {
1aac1e91
AS		 2006 while (brcmf_fws_borrow_credit(fws) == 0) {
2007 skb = brcmf_fws_deq(fws, fifo);
2008 if (!skb) {
2009 brcmf_fws_return_credits(fws, fifo, 1);
2010 break;
2011 }
eb2410cd
HM		 2012 if (brcmf_fws_commit_skb(fws, fifo, skb))
2013 break;
df50f756
HM		 2014 if (fws->bus_flow_blocked)
2015 break;
1aac1e91 2016 }
1aac1e91 2017 }
84bcc0c3 2018 }
3f4f910f 2019 brcmf_fws_unlock(fws);
bb8c8063 2020}
c7f34a69 2021
d9337414
AS		 2022int brcmf_fws_init(struct brcmf_pub *drvr)
2023{
0a4254be 2024 struct brcmf_fws_info *fws;
290fb763 2025 u32 tlv = BRCMF_FWS_FLAGS_RSSI_SIGNALS;
d9337414 2026 int rc;
1e86d696 2027 u32 mode;
d9337414 2028
d9337414
AS		 2029 drvr->fws = kzalloc(sizeof(*(drvr->fws)), GFP_KERNEL);
2030 if (!drvr->fws) {
2031 rc = -ENOMEM;
2032 goto fail;
2033 }
2034
0a4254be 2035 fws = drvr->fws;
3f4f910f
HM		 2036
2037 spin_lock_init(&fws->spinlock);
2038
d9337414 2039 /* set linkage back */
0a4254be
HM		 2040 fws->drvr = drvr;
2041 fws->fcmode = fcmode;
d9337414 2042
0a4254be
HM		 2043 fws->fws_wq = create_singlethread_workqueue("brcmf_fws_wq");
2044 if (fws->fws_wq == NULL) {
84bcc0c3
AS		 2045 brcmf_err("workqueue creation failed\n");
2046 rc = -EBADF;
2047 goto fail;
2048 }
0a4254be 2049 INIT_WORK(&fws->fws_dequeue_work, brcmf_fws_dequeue_worker);
84bcc0c3 2050
290fb763 2051 /* enable firmware signalling if fcmode active */
0a4254be 2052 if (fws->fcmode != BRCMF_FWS_FCMODE_NONE)
290fb763 2053 tlv |= BRCMF_FWS_FLAGS_XONXOFF_SIGNALS |
33753d47 2054 BRCMF_FWS_FLAGS_CREDIT_STATUS_SIGNALS |
87edd891
AS		 2055 BRCMF_FWS_FLAGS_HOST_PROPTXSTATUS_ACTIVE |
2056 BRCMF_FWS_FLAGS_HOST_RXREORDER_ACTIVE;
290fb763 2057
a786b38d
AS		 2058 rc = brcmf_fweh_register(drvr, BRCMF_E_FIFO_CREDIT_MAP,
2059 brcmf_fws_notify_credit_map);
d9337414 2060 if (rc < 0) {
a786b38d 2061 brcmf_err("register credit map handler failed\n");
d9337414
AS		 2062 goto fail;
2063 }
7d747037
HM		 2064 rc = brcmf_fweh_register(drvr, BRCMF_E_BCMC_CREDIT_SUPPORT,
2065 brcmf_fws_notify_bcmc_credit_support);
2066 if (rc < 0) {
2067 brcmf_err("register bcmc credit handler failed\n");
2068 brcmf_fweh_unregister(drvr, BRCMF_E_FIFO_CREDIT_MAP);
2069 goto fail;
2070 }
d9337414 2071
0a4254be 2072 /* Setting the iovar may fail if feature is unsupported
a786b38d 2073 * so leave the rc as is so driver initialization can
0a4254be 2074 * continue. Set mode back to none indicating not enabled.
a786b38d 2075 */
0a4254be 2076 fws->fw_signals = true;
a786b38d
AS		 2077 if (brcmf_fil_iovar_int_set(drvr->iflist[0], "tlv", tlv)) {
2078 brcmf_err("failed to set bdcv2 tlv signaling\n");
0a4254be
HM		 2079 fws->fcmode = BRCMF_FWS_FCMODE_NONE;
2080 fws->fw_signals = false;
d9337414
AS		 2081 }
2082
87edd891
AS		 2083 if (brcmf_fil_iovar_int_set(drvr->iflist[0], "ampdu_hostreorder", 1))
2084 brcmf_dbg(INFO, "enabling AMPDU host-reorder failed\n");
2085
1e86d696
HM		 2086 /* Enable seq number reuse, if supported */
2087 if (brcmf_fil_iovar_int_get(drvr->iflist[0], "wlfc_mode", &mode) == 0) {
2088 if (BRCMF_FWS_MODE_GET_REUSESEQ(mode)) {
2089 mode = 0;
2090 BRCMF_FWS_MODE_SET_REUSESEQ(mode, 1);
2091 if (brcmf_fil_iovar_int_set(drvr->iflist[0],
2092 "wlfc_mode", mode) == 0) {
2093 BRCMF_FWS_MODE_SET_REUSESEQ(fws->mode, 1);
2094 }
2095 }
2096 }
2097
0a4254be
HM		 2098 brcmf_fws_hanger_init(&fws->hanger);
2099 brcmf_fws_macdesc_init(&fws->desc.other, NULL, 0);
2100 brcmf_fws_macdesc_set_name(fws, &fws->desc.other);
2101 brcmu_pktq_init(&fws->desc.other.psq, BRCMF_FWS_PSQ_PREC_COUNT,
84bcc0c3 2102 BRCMF_FWS_PSQ_LEN);
d9337414
AS		 2103
2104 /* create debugfs file for statistics */
0a4254be 2105 brcmf_debugfs_create_fws_stats(drvr, &fws->stats);
d9337414 2106
8071fd61 2107 brcmf_dbg(INFO, "%s bdcv2 tlv signaling [%x]\n",
0a4254be 2108 fws->fw_signals ? "enabled" : "disabled", tlv);
d9337414
AS		 2109 return 0;
2110
2111fail:
d9337414
AS		 2112 brcmf_fws_deinit(drvr);
2113 return rc;
2114}
2115
2116void brcmf_fws_deinit(struct brcmf_pub *drvr)
2117{
2118 struct brcmf_fws_info *fws = drvr->fws;
d9337414 2119
47829f4f
AS		 2120 if (!fws)
2121 return;
2122
a786b38d
AS		 2123 if (drvr->fws->fws_wq)
2124 destroy_workqueue(drvr->fws->fws_wq);
2125
d9337414 2126 /* cleanup */
3f4f910f 2127 brcmf_fws_lock(fws);
d9337414
AS		 2128 brcmf_fws_cleanup(fws, -1);
2129 drvr->fws = NULL;
3f4f910f 2130 brcmf_fws_unlock(fws);
d9337414
AS		 2131
2132 /* free top structure */
2133 kfree(fws);
2134}
2135
c7f34a69
AS		 2136bool brcmf_fws_fc_active(struct brcmf_fws_info *fws)
2137{
0a4254be 2138 if (!fws->creditmap_received)
c7f34a69
AS		 2139 return false;
2140
c7f34a69
AS		 2141 return fws->fcmode != BRCMF_FWS_FCMODE_NONE;
2142}
0f8b5cc5
AS		 2143
2144void brcmf_fws_bustxfail(struct brcmf_fws_info *fws, struct sk_buff *skb)
2145{
fa587d4b 2146 u32 hslot;
0f8b5cc5 2147
c7773fc1
AS		 2148 if (brcmf_skbcb(skb)->state == BRCMF_FWS_SKBSTATE_TIM) {
2149 brcmu_pkt_buf_free_skb(skb);
2150 return;
2151 }
3f4f910f 2152 brcmf_fws_lock(fws);
fa587d4b 2153 hslot = brcmf_skb_htod_tag_get_field(skb, HSLOT);
1e86d696 2154 brcmf_fws_txs_process(fws, BRCMF_FWS_TXSTATUS_HOST_TOSSED, hslot, 0, 0);
3f4f910f 2155 brcmf_fws_unlock(fws);
0f8b5cc5 2156}
df50f756
HM		 2157
2158void brcmf_fws_bus_blocked(struct brcmf_pub *drvr, bool flow_blocked)
2159{
2160 struct brcmf_fws_info *fws = drvr->fws;
2161
2162 fws->bus_flow_blocked = flow_blocked;
2163 if (!flow_blocked)
2164 brcmf_fws_schedule_deq(fws);
5631becb
AS		 2165 else
2166 fws->stats.bus_flow_block++;
df50f756 2167}
Linux kernel - Deliverables
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