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brcmfmac: Update fwsignal to fix out of order tx.
[linux-2.6-block.git] / drivers / net / wireless / brcm80211 / brcmfmac / fwsignal.c
CommitLineData
349e7104
AS		 1/*
2 * Copyright (c) 2010 Broadcom Corporation
3 *
4 * Permission to use, copy, modify, and/or distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
11 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
13 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
14 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15 */
16#include <linux/types.h>
c7f34a69 17#include <linux/module.h>
349e7104
AS		 18#include <linux/if_ether.h>
19#include <linux/spinlock.h>
20#include <linux/skbuff.h>
21#include <linux/netdevice.h>
3edc1cff 22#include <linux/etherdevice.h>
349e7104 23#include <linux/err.h>
1aac1e91 24#include <linux/jiffies.h>
3edc1cff 25#include <net/cfg80211.h>
349e7104
AS		 26
27#include <brcmu_utils.h>
28#include <brcmu_wifi.h>
29#include "dhd.h"
3edc1cff 30#include "dhd_proto.h"
349e7104 31#include "dhd_dbg.h"
e2432b67 32#include "dhd_bus.h"
349e7104 33#include "fwil.h"
a7965fbb 34#include "fwil_types.h"
349e7104
AS		 35#include "fweh.h"
36#include "fwsignal.h"
a7965fbb
AS		 37#include "p2p.h"
38#include "wl_cfg80211.h"
349e7104
AS		 39
40/**
41 * DOC: Firmware Signalling
42 *
43 * Firmware can send signals to host and vice versa, which are passed in the
44 * data packets using TLV based header. This signalling layer is on top of the
45 * BDC bus protocol layer.
46 */
47
48/*
49 * single definition for firmware-driver flow control tlv's.
50 *
51 * each tlv is specified by BRCMF_FWS_TLV_DEF(name, ID, length).
52 * A length value 0 indicates variable length tlv.
53 */
54#define BRCMF_FWS_TLV_DEFLIST \
55 BRCMF_FWS_TLV_DEF(MAC_OPEN, 1, 1) \
56 BRCMF_FWS_TLV_DEF(MAC_CLOSE, 2, 1) \
57 BRCMF_FWS_TLV_DEF(MAC_REQUEST_CREDIT, 3, 2) \
58 BRCMF_FWS_TLV_DEF(TXSTATUS, 4, 4) \
59 BRCMF_FWS_TLV_DEF(PKTTAG, 5, 4) \
60 BRCMF_FWS_TLV_DEF(MACDESC_ADD, 6, 8) \
61 BRCMF_FWS_TLV_DEF(MACDESC_DEL, 7, 8) \
62 BRCMF_FWS_TLV_DEF(RSSI, 8, 1) \
63 BRCMF_FWS_TLV_DEF(INTERFACE_OPEN, 9, 1) \
64 BRCMF_FWS_TLV_DEF(INTERFACE_CLOSE, 10, 1) \
94607238 65 BRCMF_FWS_TLV_DEF(FIFO_CREDITBACK, 11, 6) \
349e7104
AS		 66 BRCMF_FWS_TLV_DEF(PENDING_TRAFFIC_BMP, 12, 2) \
67 BRCMF_FWS_TLV_DEF(MAC_REQUEST_PACKET, 13, 3) \
68 BRCMF_FWS_TLV_DEF(HOST_REORDER_RXPKTS, 14, 10) \
69 BRCMF_FWS_TLV_DEF(TRANS_ID, 18, 6) \
70 BRCMF_FWS_TLV_DEF(COMP_TXSTATUS, 19, 1) \
71 BRCMF_FWS_TLV_DEF(FILLER, 255, 0)
72
3edc1cff 73/*
349e7104
AS		 74 * enum brcmf_fws_tlv_type - definition of tlv identifiers.
75 */
76#define BRCMF_FWS_TLV_DEF(name, id, len) \
77 BRCMF_FWS_TYPE_ ## name = id,
78enum brcmf_fws_tlv_type {
79 BRCMF_FWS_TLV_DEFLIST
80 BRCMF_FWS_TYPE_INVALID
81};
82#undef BRCMF_FWS_TLV_DEF
83
3edc1cff
AS		 84/*
85 * enum brcmf_fws_tlv_len - definition of tlv lengths.
86 */
87#define BRCMF_FWS_TLV_DEF(name, id, len) \
88 BRCMF_FWS_TYPE_ ## name ## _LEN = (len),
89enum brcmf_fws_tlv_len {
90 BRCMF_FWS_TLV_DEFLIST
91};
92#undef BRCMF_FWS_TLV_DEF
93
349e7104 94#ifdef DEBUG
3edc1cff 95/*
349e7104
AS		 96 * brcmf_fws_tlv_names - array of tlv names.
97 */
98#define BRCMF_FWS_TLV_DEF(name, id, len) \
99 { id, #name },
100static struct {
101 enum brcmf_fws_tlv_type id;
102 const char *name;
103} brcmf_fws_tlv_names[] = {
104 BRCMF_FWS_TLV_DEFLIST
105};
106#undef BRCMF_FWS_TLV_DEF
107
1e86d696
HM		 108#define BRCMF_FWS_TYPE_SEQ_LEN 2
109
110
349e7104
AS		 111static const char *brcmf_fws_get_tlv_name(enum brcmf_fws_tlv_type id)
112{
113 int i;
114
115 for (i = 0; i < ARRAY_SIZE(brcmf_fws_tlv_names); i++)
116 if (brcmf_fws_tlv_names[i].id == id)
117 return brcmf_fws_tlv_names[i].name;
118
119 return "INVALID";
120}
121#else
122static const char *brcmf_fws_get_tlv_name(enum brcmf_fws_tlv_type id)
123{
124 return "NODEBUG";
125}
126#endif /* DEBUG */
127
3edc1cff 128/*
349e7104
AS		 129 * flags used to enable tlv signalling from firmware.
130 */
bb8c8063
AS		 131#define BRCMF_FWS_FLAGS_RSSI_SIGNALS 0x0001
132#define BRCMF_FWS_FLAGS_XONXOFF_SIGNALS 0x0002
133#define BRCMF_FWS_FLAGS_CREDIT_STATUS_SIGNALS 0x0004
134#define BRCMF_FWS_FLAGS_HOST_PROPTXSTATUS_ACTIVE 0x0008
135#define BRCMF_FWS_FLAGS_PSQ_GENERATIONFSM_ENABLE 0x0010
136#define BRCMF_FWS_FLAGS_PSQ_ZERO_BUFFER_ENABLE 0x0020
137#define BRCMF_FWS_FLAGS_HOST_RXREORDER_ACTIVE 0x0040
138
349e7104 139#define BRCMF_FWS_MAC_DESC_TABLE_SIZE 32
349e7104
AS		 140#define BRCMF_FWS_MAC_DESC_ID_INVALID 0xff
141
142#define BRCMF_FWS_HOSTIF_FLOWSTATE_OFF 0
143#define BRCMF_FWS_HOSTIF_FLOWSTATE_ON 1
84bcc0c3
AS		 144#define BRCMF_FWS_FLOWCONTROL_HIWATER 128
145#define BRCMF_FWS_FLOWCONTROL_LOWATER 64
349e7104 146
ae664609 147#define BRCMF_FWS_PSQ_PREC_COUNT ((BRCMF_FWS_FIFO_COUNT + 1) * 2)
bb8c8063
AS		 148#define BRCMF_FWS_PSQ_LEN 256
149
3edc1cff
AS		 150#define BRCMF_FWS_HTOD_FLAG_PKTFROMHOST 0x01
151#define BRCMF_FWS_HTOD_FLAG_PKT_REQUESTED 0x02
152
1e86d696
HM		 153#define BRCMF_FWS_RET_OK_NOSCHEDULE 0
154#define BRCMF_FWS_RET_OK_SCHEDULE 1
155
156#define BRCMF_FWS_MODE_REUSESEQ_SHIFT 3 /* seq reuse */
157#define BRCMF_FWS_MODE_SET_REUSESEQ(x, val) ((x) = \
158 ((x) & ~(1 << BRCMF_FWS_MODE_REUSESEQ_SHIFT)) | \
159 (((val) & 1) << BRCMF_FWS_MODE_REUSESEQ_SHIFT))
160#define BRCMF_FWS_MODE_GET_REUSESEQ(x) \
161 (((x) >> BRCMF_FWS_MODE_REUSESEQ_SHIFT) & 1)
a5e9d805 162
ebb93883
AS		 163/**
164 * enum brcmf_fws_skb_state - indicates processing state of skb.
3edc1cff
AS		 165 *
166 * @BRCMF_FWS_SKBSTATE_NEW: sk_buff is newly arrived in the driver.
167 * @BRCMF_FWS_SKBSTATE_DELAYED: sk_buff had to wait on queue.
168 * @BRCMF_FWS_SKBSTATE_SUPPRESSED: sk_buff has been suppressed by firmware.
c7773fc1 169 * @BRCMF_FWS_SKBSTATE_TIM: allocated for TIM update info.
ebb93883
AS		 170 */
171enum brcmf_fws_skb_state {
3edc1cff
AS		 172 BRCMF_FWS_SKBSTATE_NEW,
173 BRCMF_FWS_SKBSTATE_DELAYED,
c7773fc1
AS		 174 BRCMF_FWS_SKBSTATE_SUPPRESSED,
175 BRCMF_FWS_SKBSTATE_TIM
ebb93883
AS		 176};
177
178/**
179 * struct brcmf_skbuff_cb - control buffer associated with skbuff.
180 *
5491c11c 181 * @bus_flags: 2 bytes reserved for bus specific parameters
ebb93883 182 * @if_flags: holds interface index and packet related flags.
ebb93883 183 * @htod: host to device packet identifier (used in PKTTAG tlv).
1e86d696 184 * @htod_seq: this 16-bit is original seq number for every suppress packet.
ebb93883
AS		 185 * @state: transmit state of the packet.
186 * @mac: descriptor related to destination for this packet.
187 *
188 * This information is stored in control buffer struct sk_buff::cb, which
189 * provides 48 bytes of storage so this structure should not exceed that.
190 */
191struct brcmf_skbuff_cb {
5491c11c 192 u16 bus_flags;
ebb93883 193 u16 if_flags;
ebb93883 194 u32 htod;
1e86d696 195 u16 htod_seq;
ebb93883
AS		 196 enum brcmf_fws_skb_state state;
197 struct brcmf_fws_mac_descriptor *mac;
198};
199
3edc1cff 200/*
ebb93883
AS		 201 * macro casting skbuff control buffer to struct brcmf_skbuff_cb.
202 */
203#define brcmf_skbcb(skb) ((struct brcmf_skbuff_cb *)((skb)->cb))
204
3edc1cff 205/*
ebb93883
AS		 206 * sk_buff control if flags
207 *
fa587d4b 208 * b[11] - packet sent upon firmware request.
ebb93883
AS		 209 * b[10] - packet only contains signalling data.
210 * b[9] - packet is a tx packet.
fa587d4b 211 * b[8] - packet used requested credit
ebb93883 212 * b[7] - interface in AP mode.
ebb93883
AS		 213 * b[3:0] - interface index.
214 */
215#define BRCMF_SKB_IF_FLAGS_REQUESTED_MASK 0x0800
216#define BRCMF_SKB_IF_FLAGS_REQUESTED_SHIFT 11
217#define BRCMF_SKB_IF_FLAGS_SIGNAL_ONLY_MASK 0x0400
218#define BRCMF_SKB_IF_FLAGS_SIGNAL_ONLY_SHIFT 10
219#define BRCMF_SKB_IF_FLAGS_TRANSMIT_MASK 0x0200
220#define BRCMF_SKB_IF_FLAGS_TRANSMIT_SHIFT 9
fa587d4b
HM		 221#define BRCMF_SKB_IF_FLAGS_REQ_CREDIT_MASK 0x0100
222#define BRCMF_SKB_IF_FLAGS_REQ_CREDIT_SHIFT 8
ebb93883
AS		 223#define BRCMF_SKB_IF_FLAGS_IF_AP_MASK 0x0080
224#define BRCMF_SKB_IF_FLAGS_IF_AP_SHIFT 7
ebb93883
AS		 225#define BRCMF_SKB_IF_FLAGS_INDEX_MASK 0x000f
226#define BRCMF_SKB_IF_FLAGS_INDEX_SHIFT 0
227
228#define brcmf_skb_if_flags_set_field(skb, field, value) \
229 brcmu_maskset16(&(brcmf_skbcb(skb)->if_flags), \
230 BRCMF_SKB_IF_FLAGS_ ## field ## _MASK, \
231 BRCMF_SKB_IF_FLAGS_ ## field ## _SHIFT, (value))
232#define brcmf_skb_if_flags_get_field(skb, field) \
233 brcmu_maskget16(brcmf_skbcb(skb)->if_flags, \
234 BRCMF_SKB_IF_FLAGS_ ## field ## _MASK, \
235 BRCMF_SKB_IF_FLAGS_ ## field ## _SHIFT)
236
3edc1cff 237/*
ebb93883
AS		 238 * sk_buff control packet identifier
239 *
240 * 32-bit packet identifier used in PKTTAG tlv from host to dongle.
241 *
242 * - Generated at the host (e.g. dhd)
243 * - Seen as a generic sequence number by firmware except for the flags field.
244 *
245 * Generation : b[31] => generation number for this packet [host->fw]
246 * OR, current generation number [fw->host]
247 * Flags : b[30:27] => command, status flags
248 * FIFO-AC : b[26:24] => AC-FIFO id
249 * h-slot : b[23:8] => hanger-slot
250 * freerun : b[7:0] => A free running counter
251 */
252#define BRCMF_SKB_HTOD_TAG_GENERATION_MASK 0x80000000
253#define BRCMF_SKB_HTOD_TAG_GENERATION_SHIFT 31
254#define BRCMF_SKB_HTOD_TAG_FLAGS_MASK 0x78000000
255#define BRCMF_SKB_HTOD_TAG_FLAGS_SHIFT 27
256#define BRCMF_SKB_HTOD_TAG_FIFO_MASK 0x07000000
257#define BRCMF_SKB_HTOD_TAG_FIFO_SHIFT 24
258#define BRCMF_SKB_HTOD_TAG_HSLOT_MASK 0x00ffff00
259#define BRCMF_SKB_HTOD_TAG_HSLOT_SHIFT 8
260#define BRCMF_SKB_HTOD_TAG_FREERUN_MASK 0x000000ff
be4910ad 261#define BRCMF_SKB_HTOD_TAG_FREERUN_SHIFT 0
ebb93883
AS		 262
263#define brcmf_skb_htod_tag_set_field(skb, field, value) \
e2432b67 264 brcmu_maskset32(&(brcmf_skbcb(skb)->htod), \
ebb93883
AS		 265 BRCMF_SKB_HTOD_TAG_ ## field ## _MASK, \
266 BRCMF_SKB_HTOD_TAG_ ## field ## _SHIFT, (value))
267#define brcmf_skb_htod_tag_get_field(skb, field) \
e2432b67 268 brcmu_maskget32(brcmf_skbcb(skb)->htod, \
ebb93883
AS		 269 BRCMF_SKB_HTOD_TAG_ ## field ## _MASK, \
270 BRCMF_SKB_HTOD_TAG_ ## field ## _SHIFT)
271
1e86d696
HM		 272#define BRCMF_SKB_HTOD_SEQ_FROMFW_MASK 0x2000
273#define BRCMF_SKB_HTOD_SEQ_FROMFW_SHIFT 13
274#define BRCMF_SKB_HTOD_SEQ_FROMDRV_MASK 0x1000
275#define BRCMF_SKB_HTOD_SEQ_FROMDRV_SHIFT 12
276#define BRCMF_SKB_HTOD_SEQ_NR_MASK 0x0fff
277#define BRCMF_SKB_HTOD_SEQ_NR_SHIFT 0
278
279#define brcmf_skb_htod_seq_set_field(skb, field, value) \
280 brcmu_maskset16(&(brcmf_skbcb(skb)->htod_seq), \
281 BRCMF_SKB_HTOD_SEQ_ ## field ## _MASK, \
282 BRCMF_SKB_HTOD_SEQ_ ## field ## _SHIFT, (value))
283#define brcmf_skb_htod_seq_get_field(skb, field) \
284 brcmu_maskget16(brcmf_skbcb(skb)->htod_seq, \
285 BRCMF_SKB_HTOD_SEQ_ ## field ## _MASK, \
286 BRCMF_SKB_HTOD_SEQ_ ## field ## _SHIFT)
287
3edc1cff
AS		 288#define BRCMF_FWS_TXSTAT_GENERATION_MASK 0x80000000
289#define BRCMF_FWS_TXSTAT_GENERATION_SHIFT 31
290#define BRCMF_FWS_TXSTAT_FLAGS_MASK 0x78000000
291#define BRCMF_FWS_TXSTAT_FLAGS_SHIFT 27
292#define BRCMF_FWS_TXSTAT_FIFO_MASK 0x07000000
293#define BRCMF_FWS_TXSTAT_FIFO_SHIFT 24
294#define BRCMF_FWS_TXSTAT_HSLOT_MASK 0x00FFFF00
295#define BRCMF_FWS_TXSTAT_HSLOT_SHIFT 8
1e86d696
HM		 296#define BRCMF_FWS_TXSTAT_FREERUN_MASK 0x000000FF
297#define BRCMF_FWS_TXSTAT_FREERUN_SHIFT 0
3edc1cff
AS		 298
299#define brcmf_txstatus_get_field(txs, field) \
300 brcmu_maskget32(txs, BRCMF_FWS_TXSTAT_ ## field ## _MASK, \
301 BRCMF_FWS_TXSTAT_ ## field ## _SHIFT)
302
1aac1e91
AS		 303/* How long to defer borrowing in jiffies */
304#define BRCMF_FWS_BORROW_DEFER_PERIOD (HZ / 10)
305
3edc1cff
AS		 306/**
307 * enum brcmf_fws_fifo - fifo indices used by dongle firmware.
308 *
c7773fc1 309 * @BRCMF_FWS_FIFO_FIRST: first fifo, ie. background.
3edc1cff
AS		 310 * @BRCMF_FWS_FIFO_AC_BK: fifo for background traffic.
311 * @BRCMF_FWS_FIFO_AC_BE: fifo for best-effort traffic.
312 * @BRCMF_FWS_FIFO_AC_VI: fifo for video traffic.
313 * @BRCMF_FWS_FIFO_AC_VO: fifo for voice traffic.
314 * @BRCMF_FWS_FIFO_BCMC: fifo for broadcast/multicast (AP only).
315 * @BRCMF_FWS_FIFO_ATIM: fifo for ATIM (AP only).
316 * @BRCMF_FWS_FIFO_COUNT: number of fifos.
317 */
318enum brcmf_fws_fifo {
c7773fc1
AS		 319 BRCMF_FWS_FIFO_FIRST,
320 BRCMF_FWS_FIFO_AC_BK = BRCMF_FWS_FIFO_FIRST,
3edc1cff
AS		 321 BRCMF_FWS_FIFO_AC_BE,
322 BRCMF_FWS_FIFO_AC_VI,
323 BRCMF_FWS_FIFO_AC_VO,
324 BRCMF_FWS_FIFO_BCMC,
325 BRCMF_FWS_FIFO_ATIM,
326 BRCMF_FWS_FIFO_COUNT
327};
328
329/**
330 * enum brcmf_fws_txstatus - txstatus flag values.
331 *
332 * @BRCMF_FWS_TXSTATUS_DISCARD:
333 * host is free to discard the packet.
334 * @BRCMF_FWS_TXSTATUS_CORE_SUPPRESS:
335 * 802.11 core suppressed the packet.
336 * @BRCMF_FWS_TXSTATUS_FW_PS_SUPPRESS:
337 * firmware suppress the packet as device is already in PS mode.
338 * @BRCMF_FWS_TXSTATUS_FW_TOSSED:
339 * firmware tossed the packet.
fa587d4b
HM		 340 * @BRCMF_FWS_TXSTATUS_HOST_TOSSED:
341 * host tossed the packet.
3edc1cff
AS		 342 */
343enum brcmf_fws_txstatus {
344 BRCMF_FWS_TXSTATUS_DISCARD,
345 BRCMF_FWS_TXSTATUS_CORE_SUPPRESS,
346 BRCMF_FWS_TXSTATUS_FW_PS_SUPPRESS,
fa587d4b
HM		 347 BRCMF_FWS_TXSTATUS_FW_TOSSED,
348 BRCMF_FWS_TXSTATUS_HOST_TOSSED
3edc1cff
AS		 349};
350
c7f34a69
AS		 351enum brcmf_fws_fcmode {
352 BRCMF_FWS_FCMODE_NONE,
353 BRCMF_FWS_FCMODE_IMPLIED_CREDIT,
354 BRCMF_FWS_FCMODE_EXPLICIT_CREDIT
355};
356
84bcc0c3
AS		 357enum brcmf_fws_mac_desc_state {
358 BRCMF_FWS_STATE_OPEN = 1,
359 BRCMF_FWS_STATE_CLOSE
360};
361
bb8c8063
AS		 362/**
363 * struct brcmf_fws_mac_descriptor - firmware signalling data per node/interface
364 *
365 * @occupied: slot is in use.
ce814c1b 366 * @mac_handle: handle for mac entry determined by firmware.
bb8c8063
AS		 367 * @interface_id: interface index.
368 * @state: current state.
3edc1cff
AS		 369 * @suppressed: mac entry is suppressed.
370 * @generation: generation bit.
bb8c8063
AS		 371 * @ac_bitmap: ac queue bitmap.
372 * @requested_credit: credits requested by firmware.
373 * @ea: ethernet address.
3edc1cff 374 * @seq: per-node free-running sequence.
bb8c8063 375 * @psq: power-save queue.
3edc1cff 376 * @transit_count: packet in transit to firmware.
bb8c8063
AS		 377 */
378struct brcmf_fws_mac_descriptor {
8071fd61 379 char name[16];
bb8c8063 380 u8 occupied;
ce814c1b 381 u8 mac_handle;
bb8c8063
AS		 382 u8 interface_id;
383 u8 state;
3edc1cff
AS		 384 bool suppressed;
385 u8 generation;
bb8c8063
AS		 386 u8 ac_bitmap;
387 u8 requested_credit;
84bcc0c3 388 u8 requested_packet;
bb8c8063 389 u8 ea[ETH_ALEN];
3edc1cff 390 u8 seq[BRCMF_FWS_FIFO_COUNT];
bb8c8063 391 struct pktq psq;
3edc1cff 392 int transit_count;
84bcc0c3
AS		 393 int suppr_transit_count;
394 bool send_tim_signal;
395 u8 traffic_pending_bmp;
396 u8 traffic_lastreported_bmp;
bb8c8063
AS		 397};
398
6971280a
AS		 399#define BRCMF_FWS_HANGER_MAXITEMS 1024
400
401/**
402 * enum brcmf_fws_hanger_item_state - state of hanger item.
403 *
3edc1cff
AS		 404 * @BRCMF_FWS_HANGER_ITEM_STATE_FREE: item is free for use.
405 * @BRCMF_FWS_HANGER_ITEM_STATE_INUSE: item is in use.
406 * @BRCMF_FWS_HANGER_ITEM_STATE_INUSE_SUPPRESSED: item was suppressed.
6971280a
AS		 407 */
408enum brcmf_fws_hanger_item_state {
3edc1cff
AS		 409 BRCMF_FWS_HANGER_ITEM_STATE_FREE = 1,
410 BRCMF_FWS_HANGER_ITEM_STATE_INUSE,
411 BRCMF_FWS_HANGER_ITEM_STATE_INUSE_SUPPRESSED
6971280a
AS		 412};
413
414
415/**
416 * struct brcmf_fws_hanger_item - single entry for tx pending packet.
417 *
418 * @state: entry is either free or occupied.
6971280a
AS		 419 * @pkt: packet itself.
420 */
421struct brcmf_fws_hanger_item {
422 enum brcmf_fws_hanger_item_state state;
6971280a
AS		 423 struct sk_buff *pkt;
424};
425
426/**
427 * struct brcmf_fws_hanger - holds packets awaiting firmware txstatus.
428 *
6971280a
AS		 429 * @pushed: packets pushed to await txstatus.
430 * @popped: packets popped upon handling txstatus.
431 * @failed_to_push: packets that could not be pushed.
432 * @failed_to_pop: packets that could not be popped.
433 * @failed_slotfind: packets for which failed to find an entry.
434 * @slot_pos: last returned item index for a free entry.
435 * @items: array of hanger items.
436 */
437struct brcmf_fws_hanger {
438 u32 pushed;
439 u32 popped;
440 u32 failed_to_push;
441 u32 failed_to_pop;
442 u32 failed_slotfind;
443 u32 slot_pos;
444 struct brcmf_fws_hanger_item items[BRCMF_FWS_HANGER_MAXITEMS];
445};
446
84bcc0c3
AS		 447struct brcmf_fws_macdesc_table {
448 struct brcmf_fws_mac_descriptor nodes[BRCMF_FWS_MAC_DESC_TABLE_SIZE];
449 struct brcmf_fws_mac_descriptor iface[BRCMF_MAX_IFS];
450 struct brcmf_fws_mac_descriptor other;
451};
452
349e7104
AS		 453struct brcmf_fws_info {
454 struct brcmf_pub *drvr;
3f4f910f
HM		 455 spinlock_t spinlock;
456 ulong flags;
349e7104 457 struct brcmf_fws_stats stats;
6971280a 458 struct brcmf_fws_hanger hanger;
c7f34a69 459 enum brcmf_fws_fcmode fcmode;
0a4254be 460 bool fw_signals;
7d747037 461 bool bcmc_credit_check;
84bcc0c3
AS		 462 struct brcmf_fws_macdesc_table desc;
463 struct workqueue_struct *fws_wq;
464 struct work_struct fws_dequeue_work;
465 u32 fifo_enqpkt[BRCMF_FWS_FIFO_COUNT];
3edc1cff 466 int fifo_credit[BRCMF_FWS_FIFO_COUNT];
1aac1e91 467 int credits_borrowed[BRCMF_FWS_FIFO_AC_VO + 1];
84bcc0c3
AS		 468 int deq_node_pos[BRCMF_FWS_FIFO_COUNT];
469 u32 fifo_credit_map;
470 u32 fifo_delay_map;
1aac1e91 471 unsigned long borrow_defer_timestamp;
df50f756 472 bool bus_flow_blocked;
0d24b0ea 473 bool creditmap_received;
1e86d696 474 u8 mode;
3edc1cff
AS		 475};
476
477/*
478 * brcmf_fws_prio2fifo - mapping from 802.1d priority to firmware fifo index.
479 */
480static const int brcmf_fws_prio2fifo[] = {
481 BRCMF_FWS_FIFO_AC_BE,
482 BRCMF_FWS_FIFO_AC_BK,
483 BRCMF_FWS_FIFO_AC_BK,
484 BRCMF_FWS_FIFO_AC_BE,
485 BRCMF_FWS_FIFO_AC_VI,
486 BRCMF_FWS_FIFO_AC_VI,
487 BRCMF_FWS_FIFO_AC_VO,
488 BRCMF_FWS_FIFO_AC_VO
349e7104
AS		 489};
490
c7f34a69
AS		 491static int fcmode;
492module_param(fcmode, int, S_IRUSR);
493MODULE_PARM_DESC(fcmode, "mode of firmware signalled flow control");
494
bb8c8063
AS		 495#define BRCMF_FWS_TLV_DEF(name, id, len) \
496 case BRCMF_FWS_TYPE_ ## name: \
497 return len;
498
3edc1cff
AS		 499/**
500 * brcmf_fws_get_tlv_len() - returns defined length for given tlv id.
501 *
502 * @fws: firmware-signalling information.
503 * @id: identifier of the TLV.
504 *
505 * Return: the specified length for the given TLV; Otherwise -EINVAL.
506 */
bb8c8063
AS		 507static int brcmf_fws_get_tlv_len(struct brcmf_fws_info *fws,
508 enum brcmf_fws_tlv_type id)
509{
510 switch (id) {
511 BRCMF_FWS_TLV_DEFLIST
512 default:
bb8c8063
AS		 513 fws->stats.tlv_invalid_type++;
514 break;
515 }
516 return -EINVAL;
517}
518#undef BRCMF_FWS_TLV_DEF
519
3f4f910f
HM		 520static void brcmf_fws_lock(struct brcmf_fws_info *fws)
521 __acquires(&fws->spinlock)
522{
523 spin_lock_irqsave(&fws->spinlock, fws->flags);
524}
525
526static void brcmf_fws_unlock(struct brcmf_fws_info *fws)
527 __releases(&fws->spinlock)
528{
529 spin_unlock_irqrestore(&fws->spinlock, fws->flags);
530}
531
3edc1cff
AS		 532static bool brcmf_fws_ifidx_match(struct sk_buff *skb, void *arg)
533{
534 u32 ifidx = brcmf_skb_if_flags_get_field(skb, INDEX);
535 return ifidx == *(int *)arg;
536}
537
538static void brcmf_fws_psq_flush(struct brcmf_fws_info *fws, struct pktq *q,
539 int ifidx)
540{
541 bool (*matchfn)(struct sk_buff *, void *) = NULL;
542 struct sk_buff *skb;
543 int prec;
544
545 if (ifidx != -1)
546 matchfn = brcmf_fws_ifidx_match;
547 for (prec = 0; prec < q->num_prec; prec++) {
548 skb = brcmu_pktq_pdeq_match(q, prec, matchfn, &ifidx);
549 while (skb) {
84bcc0c3 550 brcmu_pkt_buf_free_skb(skb);
3edc1cff
AS		 551 skb = brcmu_pktq_pdeq_match(q, prec, matchfn, &ifidx);
552 }
553 }
554}
555
6971280a
AS		 556static void brcmf_fws_hanger_init(struct brcmf_fws_hanger *hanger)
557{
558 int i;
559
6971280a
AS		 560 memset(hanger, 0, sizeof(*hanger));
561 for (i = 0; i < ARRAY_SIZE(hanger->items); i++)
3edc1cff 562 hanger->items[i].state = BRCMF_FWS_HANGER_ITEM_STATE_FREE;
6971280a
AS		 563}
564
3edc1cff 565static u32 brcmf_fws_hanger_get_free_slot(struct brcmf_fws_hanger *h)
6971280a
AS		 566{
567 u32 i;
568
6971280a
AS		 569 i = (h->slot_pos + 1) % BRCMF_FWS_HANGER_MAXITEMS;
570
571 while (i != h->slot_pos) {
3edc1cff 572 if (h->items[i].state == BRCMF_FWS_HANGER_ITEM_STATE_FREE) {
6971280a 573 h->slot_pos = i;
84bcc0c3 574 goto done;
6971280a
AS		 575 }
576 i++;
577 if (i == BRCMF_FWS_HANGER_MAXITEMS)
578 i = 0;
579 }
580 brcmf_err("all slots occupied\n");
581 h->failed_slotfind++;
84bcc0c3
AS		 582 i = BRCMF_FWS_HANGER_MAXITEMS;
583done:
84bcc0c3 584 return i;
6971280a
AS		 585}
586
3edc1cff 587static int brcmf_fws_hanger_pushpkt(struct brcmf_fws_hanger *h,
be4910ad 588 struct sk_buff *pkt, u32 slot_id)
6971280a 589{
6971280a
AS		 590 if (slot_id >= BRCMF_FWS_HANGER_MAXITEMS)
591 return -ENOENT;
592
593 if (h->items[slot_id].state != BRCMF_FWS_HANGER_ITEM_STATE_FREE) {
594 brcmf_err("slot is not free\n");
595 h->failed_to_push++;
596 return -EINVAL;
597 }
598
599 h->items[slot_id].state = BRCMF_FWS_HANGER_ITEM_STATE_INUSE;
600 h->items[slot_id].pkt = pkt;
6971280a
AS		 601 h->pushed++;
602 return 0;
603}
604
3edc1cff 605static int brcmf_fws_hanger_poppkt(struct brcmf_fws_hanger *h,
6971280a
AS		 606 u32 slot_id, struct sk_buff **pktout,
607 bool remove_item)
608{
6971280a
AS		 609 if (slot_id >= BRCMF_FWS_HANGER_MAXITEMS)
610 return -ENOENT;
611
612 if (h->items[slot_id].state == BRCMF_FWS_HANGER_ITEM_STATE_FREE) {
613 brcmf_err("entry not in use\n");
614 h->failed_to_pop++;
615 return -EINVAL;
616 }
617
618 *pktout = h->items[slot_id].pkt;
619 if (remove_item) {
620 h->items[slot_id].state = BRCMF_FWS_HANGER_ITEM_STATE_FREE;
621 h->items[slot_id].pkt = NULL;
6971280a
AS		 622 h->popped++;
623 }
624 return 0;
625}
626
84bcc0c3 627static int brcmf_fws_hanger_mark_suppressed(struct brcmf_fws_hanger *h,
be4910ad 628 u32 slot_id)
6971280a 629{
6971280a
AS		 630 if (slot_id >= BRCMF_FWS_HANGER_MAXITEMS)
631 return -ENOENT;
632
5631becb 633 if (h->items[slot_id].state == BRCMF_FWS_HANGER_ITEM_STATE_FREE) {
6971280a
AS		 634 brcmf_err("entry not in use\n");
635 return -EINVAL;
636 }
637
3edc1cff 638 h->items[slot_id].state = BRCMF_FWS_HANGER_ITEM_STATE_INUSE_SUPPRESSED;
6971280a
AS		 639 return 0;
640}
641
84bcc0c3 642static void brcmf_fws_hanger_cleanup(struct brcmf_fws_info *fws,
6971280a
AS		 643 bool (*fn)(struct sk_buff *, void *),
644 int ifidx)
645{
84bcc0c3 646 struct brcmf_fws_hanger *h = &fws->hanger;
6971280a
AS		 647 struct sk_buff *skb;
648 int i;
649 enum brcmf_fws_hanger_item_state s;
650
6971280a
AS		 651 for (i = 0; i < ARRAY_SIZE(h->items); i++) {
652 s = h->items[i].state;
653 if (s == BRCMF_FWS_HANGER_ITEM_STATE_INUSE ||
654 s == BRCMF_FWS_HANGER_ITEM_STATE_INUSE_SUPPRESSED) {
655 skb = h->items[i].pkt;
656 if (fn == NULL || fn(skb, &ifidx)) {
657 /* suppress packets freed from psq */
658 if (s == BRCMF_FWS_HANGER_ITEM_STATE_INUSE)
659 brcmu_pkt_buf_free_skb(skb);
660 h->items[i].state =
661 BRCMF_FWS_HANGER_ITEM_STATE_FREE;
662 }
663 }
664 }
665}
666
8071fd61
AS		 667static void brcmf_fws_macdesc_set_name(struct brcmf_fws_info *fws,
668 struct brcmf_fws_mac_descriptor *desc)
669{
670 if (desc == &fws->desc.other)
671 strlcpy(desc->name, "MAC-OTHER", sizeof(desc->name));
672 else if (desc->mac_handle)
673 scnprintf(desc->name, sizeof(desc->name), "MAC-%d:%d",
674 desc->mac_handle, desc->interface_id);
675 else
676 scnprintf(desc->name, sizeof(desc->name), "MACIF:%d",
677 desc->interface_id);
678}
679
1ab083a3
AS		 680static void brcmf_fws_macdesc_init(struct brcmf_fws_mac_descriptor *desc,
681 u8 *addr, u8 ifidx)
ce814c1b 682{
84bcc0c3
AS		 683 brcmf_dbg(TRACE,
684 "enter: desc %p ea=%pM, ifidx=%u\n", desc, addr, ifidx);
ce814c1b
AS		 685 desc->occupied = 1;
686 desc->state = BRCMF_FWS_STATE_OPEN;
687 desc->requested_credit = 0;
fa587d4b 688 desc->requested_packet = 0;
ce814c1b
AS		 689 /* depending on use may need ifp->bssidx instead */
690 desc->interface_id = ifidx;
691 desc->ac_bitmap = 0xff; /* update this when handling APSD */
84bcc0c3
AS		 692 if (addr)
693 memcpy(&desc->ea[0], addr, ETH_ALEN);
ce814c1b
AS		 694}
695
696static
1ab083a3 697void brcmf_fws_macdesc_deinit(struct brcmf_fws_mac_descriptor *desc)
ce814c1b
AS		 698{
699 brcmf_dbg(TRACE,
700 "enter: ea=%pM, ifidx=%u\n", desc->ea, desc->interface_id);
701 desc->occupied = 0;
702 desc->state = BRCMF_FWS_STATE_CLOSE;
703 desc->requested_credit = 0;
fa587d4b 704 desc->requested_packet = 0;
ce814c1b
AS		 705}
706
707static struct brcmf_fws_mac_descriptor *
1ab083a3 708brcmf_fws_macdesc_lookup(struct brcmf_fws_info *fws, u8 *ea)
ce814c1b
AS		 709{
710 struct brcmf_fws_mac_descriptor *entry;
711 int i;
712
ce814c1b
AS		 713 if (ea == NULL)
714 return ERR_PTR(-EINVAL);
715
84bcc0c3
AS		 716 entry = &fws->desc.nodes[0];
717 for (i = 0; i < ARRAY_SIZE(fws->desc.nodes); i++) {
ce814c1b
AS		 718 if (entry->occupied && !memcmp(entry->ea, ea, ETH_ALEN))
719 return entry;
720 entry++;
721 }
722
723 return ERR_PTR(-ENOENT);
724}
725
3edc1cff 726static struct brcmf_fws_mac_descriptor*
1ab083a3 727brcmf_fws_macdesc_find(struct brcmf_fws_info *fws, struct brcmf_if *ifp, u8 *da)
3edc1cff 728{
84bcc0c3 729 struct brcmf_fws_mac_descriptor *entry = &fws->desc.other;
3edc1cff 730 bool multicast;
3edc1cff 731
f97a7f06 732 multicast = is_multicast_ether_addr(da);
a7965fbb 733
5cd51c2b
HM		 734 /* Multicast destination, STA and P2P clients get the interface entry.
735 * STA/GC gets the Mac Entry for TDLS destinations, TDLS destinations
736 * have their own entry.
3edc1cff 737 */
5cd51c2b 738 if (multicast && ifp->fws_desc) {
3edc1cff 739 entry = ifp->fws_desc;
3edc1cff 740 goto done;
5cd51c2b 741 }
3edc1cff 742
1ab083a3 743 entry = brcmf_fws_macdesc_lookup(fws, da);
3edc1cff 744 if (IS_ERR(entry))
5cd51c2b 745 entry = ifp->fws_desc;
3edc1cff
AS		 746
747done:
3edc1cff
AS		 748 return entry;
749}
750
1ab083a3
AS		 751static bool brcmf_fws_macdesc_closed(struct brcmf_fws_info *fws,
752 struct brcmf_fws_mac_descriptor *entry,
753 int fifo)
84bcc0c3 754{
b75c1a30 755 struct brcmf_fws_mac_descriptor *if_entry;
9fc60224 756 bool closed;
84bcc0c3 757
b75c1a30
AS		 758 /* for unique destination entries the related interface
759 * may be closed.
760 */
761 if (entry->mac_handle) {
762 if_entry = &fws->desc.iface[entry->interface_id];
763 if (if_entry->state == BRCMF_FWS_STATE_CLOSE)
764 return true;
765 }
9fc60224
AS		 766 /* an entry is closed when the state is closed and
767 * the firmware did not request anything.
84bcc0c3 768 */
9fc60224
AS		 769 closed = entry->state == BRCMF_FWS_STATE_CLOSE &&
770 !entry->requested_credit && !entry->requested_packet;
84bcc0c3 771
9fc60224
AS		 772 /* Or firmware does not allow traffic for given fifo */
773 return closed || !(entry->ac_bitmap & BIT(fifo));
84bcc0c3
AS		 774}
775
1ab083a3
AS		 776static void brcmf_fws_macdesc_cleanup(struct brcmf_fws_info *fws,
777 struct brcmf_fws_mac_descriptor *entry,
778 int ifidx)
fba1400a 779{
3edc1cff 780 if (entry->occupied && (ifidx == -1 || ifidx == entry->interface_id)) {
3edc1cff 781 brcmf_fws_psq_flush(fws, &entry->psq, ifidx);
fba1400a
AS		 782 entry->occupied = !!(entry->psq.len);
783 }
784}
785
e2432b67
AS		 786static void brcmf_fws_bus_txq_cleanup(struct brcmf_fws_info *fws,
787 bool (*fn)(struct sk_buff *, void *),
788 int ifidx)
789{
790 struct brcmf_fws_hanger_item *hi;
791 struct pktq *txq;
792 struct sk_buff *skb;
793 int prec;
794 u32 hslot;
795
e2432b67
AS		 796 txq = brcmf_bus_gettxq(fws->drvr->bus_if);
797 if (IS_ERR(txq)) {
798 brcmf_dbg(TRACE, "no txq to clean up\n");
799 return;
800 }
801
802 for (prec = 0; prec < txq->num_prec; prec++) {
803 skb = brcmu_pktq_pdeq_match(txq, prec, fn, &ifidx);
804 while (skb) {
805 hslot = brcmf_skb_htod_tag_get_field(skb, HSLOT);
806 hi = &fws->hanger.items[hslot];
807 WARN_ON(skb != hi->pkt);
808 hi->state = BRCMF_FWS_HANGER_ITEM_STATE_FREE;
809 brcmu_pkt_buf_free_skb(skb);
810 skb = brcmu_pktq_pdeq_match(txq, prec, fn, &ifidx);
811 }
812 }
813}
814
fba1400a
AS		 815static void brcmf_fws_cleanup(struct brcmf_fws_info *fws, int ifidx)
816{
817 int i;
818 struct brcmf_fws_mac_descriptor *table;
a3e993c7 819 bool (*matchfn)(struct sk_buff *, void *) = NULL;
fba1400a 820
fba1400a
AS		 821 if (fws == NULL)
822 return;
823
a3e993c7
AS		 824 if (ifidx != -1)
825 matchfn = brcmf_fws_ifidx_match;
826
fba1400a 827 /* cleanup individual nodes */
84bcc0c3
AS		 828 table = &fws->desc.nodes[0];
829 for (i = 0; i < ARRAY_SIZE(fws->desc.nodes); i++)
1ab083a3 830 brcmf_fws_macdesc_cleanup(fws, &table[i], ifidx);
fba1400a 831
1ab083a3 832 brcmf_fws_macdesc_cleanup(fws, &fws->desc.other, ifidx);
e2432b67 833 brcmf_fws_bus_txq_cleanup(fws, matchfn, ifidx);
84bcc0c3
AS		 834 brcmf_fws_hanger_cleanup(fws, matchfn, ifidx);
835}
836
c7773fc1 837static int brcmf_fws_hdrpush(struct brcmf_fws_info *fws, struct sk_buff *skb)
84bcc0c3 838{
c7773fc1
AS		 839 struct brcmf_fws_mac_descriptor *entry = brcmf_skbcb(skb)->mac;
840 u8 *wlh;
841 u16 data_offset = 0;
842 u8 fillers;
843 __le32 pkttag = cpu_to_le32(brcmf_skbcb(skb)->htod);
1e86d696 844 __le16 pktseq = cpu_to_le16(brcmf_skbcb(skb)->htod_seq);
c7773fc1 845
1e86d696 846 brcmf_dbg(TRACE, "enter: %s, idx=%d hslot=%d htod %X seq %X\n",
80898a11 847 entry->name, brcmf_skb_if_flags_get_field(skb, INDEX),
1e86d696
HM		 848 (le32_to_cpu(pkttag) >> 8) & 0xffff,
849 brcmf_skbcb(skb)->htod, brcmf_skbcb(skb)->htod_seq);
c7773fc1
AS		 850 if (entry->send_tim_signal)
851 data_offset += 2 + BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP_LEN;
1e86d696
HM		 852 if (BRCMF_FWS_MODE_GET_REUSESEQ(fws->mode))
853 data_offset += BRCMF_FWS_TYPE_SEQ_LEN;
c7773fc1
AS		 854 /* +2 is for Type[1] and Len[1] in TLV, plus TIM signal */
855 data_offset += 2 + BRCMF_FWS_TYPE_PKTTAG_LEN;
856 fillers = round_up(data_offset, 4) - data_offset;
857 data_offset += fillers;
858
859 skb_push(skb, data_offset);
860 wlh = skb->data;
861
862 wlh[0] = BRCMF_FWS_TYPE_PKTTAG;
863 wlh[1] = BRCMF_FWS_TYPE_PKTTAG_LEN;
864 memcpy(&wlh[2], &pkttag, sizeof(pkttag));
1e86d696
HM		 865 if (BRCMF_FWS_MODE_GET_REUSESEQ(fws->mode)) {
866 wlh[1] += BRCMF_FWS_TYPE_SEQ_LEN;
867 memcpy(&wlh[2 + BRCMF_FWS_TYPE_PKTTAG_LEN], &pktseq,
868 sizeof(pktseq));
869 }
870 wlh += wlh[1] + 2;
c7773fc1
AS		 871
872 if (entry->send_tim_signal) {
873 entry->send_tim_signal = 0;
874 wlh[0] = BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP;
875 wlh[1] = BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP_LEN;
876 wlh[2] = entry->mac_handle;
877 wlh[3] = entry->traffic_pending_bmp;
80898a11
AS		 878 brcmf_dbg(TRACE, "adding TIM info: handle %d bmp 0x%X\n",
879 entry->mac_handle, entry->traffic_pending_bmp);
c7773fc1
AS		 880 wlh += BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP_LEN + 2;
881 entry->traffic_lastreported_bmp = entry->traffic_pending_bmp;
84bcc0c3 882 }
c7773fc1
AS		 883 if (fillers)
884 memset(wlh, BRCMF_FWS_TYPE_FILLER, fillers);
885
886 brcmf_proto_hdrpush(fws->drvr, brcmf_skb_if_flags_get_field(skb, INDEX),
887 data_offset >> 2, skb);
888 return 0;
889}
890
891static bool brcmf_fws_tim_update(struct brcmf_fws_info *fws,
892 struct brcmf_fws_mac_descriptor *entry,
4e89dfca 893 int fifo, bool send_immediately)
c7773fc1
AS		 894{
895 struct sk_buff *skb;
896 struct brcmf_bus *bus;
897 struct brcmf_skbuff_cb *skcb;
898 s32 err;
899 u32 len;
900
901 /* check delayedQ and suppressQ in one call using bitmap */
4e89dfca
AS		 902 if (brcmu_pktq_mlen(&entry->psq, 3 << (fifo * 2)) == 0)
903 entry->traffic_pending_bmp &= ~NBITVAL(fifo);
c7773fc1 904 else
4e89dfca 905 entry->traffic_pending_bmp |= NBITVAL(fifo);
c7773fc1
AS		 906
907 entry->send_tim_signal = false;
84bcc0c3
AS		 908 if (entry->traffic_lastreported_bmp != entry->traffic_pending_bmp)
909 entry->send_tim_signal = true;
c7773fc1
AS		 910 if (send_immediately && entry->send_tim_signal &&
911 entry->state == BRCMF_FWS_STATE_CLOSE) {
912 /* create a dummy packet and sent that. The traffic */
913 /* bitmap info will automatically be attached to that packet */
914 len = BRCMF_FWS_TYPE_PKTTAG_LEN + 2 +
1e86d696 915 BRCMF_FWS_TYPE_SEQ_LEN +
c7773fc1
AS		 916 BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP_LEN + 2 +
917 4 + fws->drvr->hdrlen;
918 skb = brcmu_pkt_buf_get_skb(len);
919 if (skb == NULL)
920 return false;
921 skb_pull(skb, len);
922 skcb = brcmf_skbcb(skb);
923 skcb->mac = entry;
924 skcb->state = BRCMF_FWS_SKBSTATE_TIM;
1e86d696
HM		 925 skcb->htod = 0;
926 skcb->htod_seq = 0;
c7773fc1
AS		 927 bus = fws->drvr->bus_if;
928 err = brcmf_fws_hdrpush(fws, skb);
3f4f910f
HM		 929 if (err == 0) {
930 brcmf_fws_unlock(fws);
c7773fc1 931 err = brcmf_bus_txdata(bus, skb);
3f4f910f
HM		 932 brcmf_fws_lock(fws);
933 }
c7773fc1
AS		 934 if (err)
935 brcmu_pkt_buf_free_skb(skb);
936 return true;
937 }
938 return false;
84bcc0c3
AS		 939}
940
941static void
942brcmf_fws_flow_control_check(struct brcmf_fws_info *fws, struct pktq *pq,
943 u8 if_id)
944{
402e3ba2 945 struct brcmf_if *ifp = fws->drvr->iflist[!if_id ? 0 : if_id + 1];
84bcc0c3 946
84bcc0c3
AS		 947 if (WARN_ON(!ifp))
948 return;
949
950 if ((ifp->netif_stop & BRCMF_NETIF_STOP_REASON_FWS_FC) &&
951 pq->len <= BRCMF_FWS_FLOWCONTROL_LOWATER)
952 brcmf_txflowblock_if(ifp,
953 BRCMF_NETIF_STOP_REASON_FWS_FC, false);
954 if (!(ifp->netif_stop & BRCMF_NETIF_STOP_REASON_FWS_FC) &&
5631becb
AS		 955 pq->len >= BRCMF_FWS_FLOWCONTROL_HIWATER) {
956 fws->stats.fws_flow_block++;
84bcc0c3 957 brcmf_txflowblock_if(ifp, BRCMF_NETIF_STOP_REASON_FWS_FC, true);
5631becb 958 }
84bcc0c3 959 return;
fba1400a
AS		 960}
961
349e7104
AS		 962static int brcmf_fws_rssi_indicate(struct brcmf_fws_info *fws, s8 rssi)
963{
964 brcmf_dbg(CTL, "rssi %d\n", rssi);
965 return 0;
966}
967
ce814c1b
AS		 968static
969int brcmf_fws_macdesc_indicate(struct brcmf_fws_info *fws, u8 type, u8 *data)
970{
971 struct brcmf_fws_mac_descriptor *entry, *existing;
972 u8 mac_handle;
973 u8 ifidx;
974 u8 *addr;
975
976 mac_handle = *data++;
977 ifidx = *data++;
978 addr = data;
979
84bcc0c3 980 entry = &fws->desc.nodes[mac_handle & 0x1F];
ce814c1b 981 if (type == BRCMF_FWS_TYPE_MACDESC_DEL) {
9a83f1ec 982 if (entry->occupied) {
8071fd61
AS		 983 brcmf_dbg(TRACE, "deleting %s mac %pM\n",
984 entry->name, addr);
3f4f910f 985 brcmf_fws_lock(fws);
1ab083a3
AS		 986 brcmf_fws_macdesc_cleanup(fws, entry, -1);
987 brcmf_fws_macdesc_deinit(entry);
3f4f910f 988 brcmf_fws_unlock(fws);
9a83f1ec 989 } else
ce814c1b 990 fws->stats.mac_update_failed++;
ce814c1b
AS		 991 return 0;
992 }
993
1ab083a3 994 existing = brcmf_fws_macdesc_lookup(fws, addr);
ce814c1b
AS		 995 if (IS_ERR(existing)) {
996 if (!entry->occupied) {
3f4f910f 997 brcmf_fws_lock(fws);
ce814c1b 998 entry->mac_handle = mac_handle;
1ab083a3 999 brcmf_fws_macdesc_init(entry, addr, ifidx);
8071fd61 1000 brcmf_fws_macdesc_set_name(fws, entry);
ce814c1b
AS		 1001 brcmu_pktq_init(&entry->psq, BRCMF_FWS_PSQ_PREC_COUNT,
1002 BRCMF_FWS_PSQ_LEN);
3f4f910f 1003 brcmf_fws_unlock(fws);
8071fd61 1004 brcmf_dbg(TRACE, "add %s mac %pM\n", entry->name, addr);
ce814c1b
AS		 1005 } else {
1006 fws->stats.mac_update_failed++;
1007 }
1008 } else {
1009 if (entry != existing) {
8071fd61 1010 brcmf_dbg(TRACE, "copy mac %s\n", existing->name);
3f4f910f 1011 brcmf_fws_lock(fws);
ce814c1b
AS		 1012 memcpy(entry, existing,
1013 offsetof(struct brcmf_fws_mac_descriptor, psq));
1014 entry->mac_handle = mac_handle;
1ab083a3 1015 brcmf_fws_macdesc_deinit(existing);
8071fd61 1016 brcmf_fws_macdesc_set_name(fws, entry);
3f4f910f 1017 brcmf_fws_unlock(fws);
8071fd61
AS		 1018 brcmf_dbg(TRACE, "relocate %s mac %pM\n", entry->name,
1019 addr);
ce814c1b
AS		 1020 } else {
1021 brcmf_dbg(TRACE, "use existing\n");
1022 WARN_ON(entry->mac_handle != mac_handle);
1023 /* TODO: what should we do here: continue, reinit, .. */
1024 }
1025 }
1026 return 0;
1027}
1028
33753d47
AS		 1029static int brcmf_fws_macdesc_state_indicate(struct brcmf_fws_info *fws,
1030 u8 type, u8 *data)
1031{
1032 struct brcmf_fws_mac_descriptor *entry;
1033 u8 mac_handle;
c6a681ab 1034 int ret;
33753d47
AS		 1035
1036 mac_handle = data[0];
1037 entry = &fws->desc.nodes[mac_handle & 0x1F];
1038 if (!entry->occupied) {
1039 fws->stats.mac_ps_update_failed++;
1040 return -ESRCH;
1041 }
3f4f910f 1042 brcmf_fws_lock(fws);
c7773fc1 1043 /* a state update should wipe old credits */
33753d47 1044 entry->requested_credit = 0;
c7773fc1 1045 entry->requested_packet = 0;
33753d47
AS		 1046 if (type == BRCMF_FWS_TYPE_MAC_OPEN) {
1047 entry->state = BRCMF_FWS_STATE_OPEN;
c6a681ab 1048 ret = BRCMF_FWS_RET_OK_SCHEDULE;
33753d47
AS		 1049 } else {
1050 entry->state = BRCMF_FWS_STATE_CLOSE;
c7773fc1
AS		 1051 brcmf_fws_tim_update(fws, entry, BRCMF_FWS_FIFO_AC_BK, false);
1052 brcmf_fws_tim_update(fws, entry, BRCMF_FWS_FIFO_AC_BE, false);
1053 brcmf_fws_tim_update(fws, entry, BRCMF_FWS_FIFO_AC_VI, false);
1054 brcmf_fws_tim_update(fws, entry, BRCMF_FWS_FIFO_AC_VO, true);
c6a681ab 1055 ret = BRCMF_FWS_RET_OK_NOSCHEDULE;
33753d47 1056 }
3f4f910f 1057 brcmf_fws_unlock(fws);
c6a681ab 1058 return ret;
33753d47
AS		 1059}
1060
1061static int brcmf_fws_interface_state_indicate(struct brcmf_fws_info *fws,
1062 u8 type, u8 *data)
1063{
1064 struct brcmf_fws_mac_descriptor *entry;
1065 u8 ifidx;
1066 int ret;
1067
1068 ifidx = data[0];
1069
33753d47
AS		 1070 if (ifidx >= BRCMF_MAX_IFS) {
1071 ret = -ERANGE;
1072 goto fail;
1073 }
1074
1075 entry = &fws->desc.iface[ifidx];
1076 if (!entry->occupied) {
1077 ret = -ESRCH;
1078 goto fail;
1079 }
1080
8071fd61
AS		 1081 brcmf_dbg(TRACE, "%s (%d): %s\n", brcmf_fws_get_tlv_name(type), type,
1082 entry->name);
3f4f910f 1083 brcmf_fws_lock(fws);
33753d47
AS		 1084 switch (type) {
1085 case BRCMF_FWS_TYPE_INTERFACE_OPEN:
1086 entry->state = BRCMF_FWS_STATE_OPEN;
c6a681ab
AS		 1087 ret = BRCMF_FWS_RET_OK_SCHEDULE;
1088 break;
33753d47
AS		 1089 case BRCMF_FWS_TYPE_INTERFACE_CLOSE:
1090 entry->state = BRCMF_FWS_STATE_CLOSE;
c6a681ab
AS		 1091 ret = BRCMF_FWS_RET_OK_NOSCHEDULE;
1092 break;
33753d47
AS		 1093 default:
1094 ret = -EINVAL;
3f4f910f 1095 brcmf_fws_unlock(fws);
c6a681ab 1096 goto fail;
33753d47 1097 }
3f4f910f 1098 brcmf_fws_unlock(fws);
c6a681ab
AS		 1099 return ret;
1100
33753d47
AS		 1101fail:
1102 fws->stats.if_update_failed++;
1103 return ret;
1104}
1105
5f38b683
AS		 1106static int brcmf_fws_request_indicate(struct brcmf_fws_info *fws, u8 type,
1107 u8 *data)
1108{
1109 struct brcmf_fws_mac_descriptor *entry;
1110
1111 entry = &fws->desc.nodes[data[1] & 0x1F];
1112 if (!entry->occupied) {
1113 if (type == BRCMF_FWS_TYPE_MAC_REQUEST_CREDIT)
1114 fws->stats.credit_request_failed++;
1115 else
1116 fws->stats.packet_request_failed++;
1117 return -ESRCH;
1118 }
1119
8071fd61
AS		 1120 brcmf_dbg(TRACE, "%s (%d): %s cnt %d bmp %d\n",
1121 brcmf_fws_get_tlv_name(type), type, entry->name,
1122 data[0], data[2]);
3f4f910f 1123 brcmf_fws_lock(fws);
5f38b683
AS		 1124 if (type == BRCMF_FWS_TYPE_MAC_REQUEST_CREDIT)
1125 entry->requested_credit = data[0];
1126 else
1127 entry->requested_packet = data[0];
1128
1129 entry->ac_bitmap = data[2];
3f4f910f 1130 brcmf_fws_unlock(fws);
a5e9d805 1131 return BRCMF_FWS_RET_OK_SCHEDULE;
5f38b683
AS		 1132}
1133
fa587d4b
HM		 1134static void
1135brcmf_fws_macdesc_use_req_credit(struct brcmf_fws_mac_descriptor *entry,
1136 struct sk_buff *skb)
289ec1c7 1137{
fa587d4b
HM		 1138 if (entry->requested_credit > 0) {
1139 entry->requested_credit--;
1140 brcmf_skb_if_flags_set_field(skb, REQUESTED, 1);
1141 brcmf_skb_if_flags_set_field(skb, REQ_CREDIT, 1);
1142 if (entry->state != BRCMF_FWS_STATE_CLOSE)
1143 brcmf_err("requested credit set while mac not closed!\n");
1144 } else if (entry->requested_packet > 0) {
1145 entry->requested_packet--;
1146 brcmf_skb_if_flags_set_field(skb, REQUESTED, 1);
1147 brcmf_skb_if_flags_set_field(skb, REQ_CREDIT, 0);
1148 if (entry->state != BRCMF_FWS_STATE_CLOSE)
1149 brcmf_err("requested packet set while mac not closed!\n");
289ec1c7 1150 } else {
fa587d4b
HM		 1151 brcmf_skb_if_flags_set_field(skb, REQUESTED, 0);
1152 brcmf_skb_if_flags_set_field(skb, REQ_CREDIT, 0);
289ec1c7 1153 }
fa587d4b
HM		 1154}
1155
1156static void brcmf_fws_macdesc_return_req_credit(struct sk_buff *skb)
1157{
1158 struct brcmf_fws_mac_descriptor *entry = brcmf_skbcb(skb)->mac;
1159
1160 if ((brcmf_skb_if_flags_get_field(skb, REQ_CREDIT)) &&
1161 (entry->state == BRCMF_FWS_STATE_CLOSE))
1162 entry->requested_credit++;
289ec1c7
AS		 1163}
1164
84bcc0c3
AS		 1165static void brcmf_fws_return_credits(struct brcmf_fws_info *fws,
1166 u8 fifo, u8 credits)
1167{
1aac1e91
AS		 1168 int lender_ac;
1169 int *borrowed;
1170 int *fifo_credit;
1171
84bcc0c3
AS		 1172 if (!credits)
1173 return;
1174
afc3bbfc
HM		 1175 fws->fifo_credit_map |= 1 << fifo;
1176
1aac1e91
AS		 1177 if ((fifo == BRCMF_FWS_FIFO_AC_BE) &&
1178 (fws->credits_borrowed[0])) {
1179 for (lender_ac = BRCMF_FWS_FIFO_AC_VO; lender_ac >= 0;
1180 lender_ac--) {
1181 borrowed = &fws->credits_borrowed[lender_ac];
1182 if (*borrowed) {
1183 fws->fifo_credit_map |= (1 << lender_ac);
1184 fifo_credit = &fws->fifo_credit[lender_ac];
1185 if (*borrowed >= credits) {
1186 *borrowed -= credits;
1187 *fifo_credit += credits;
1188 return;
1189 } else {
1190 credits -= *borrowed;
1191 *fifo_credit += *borrowed;
1192 *borrowed = 0;
1193 }
1194 }
1195 }
1196 }
1197
84bcc0c3
AS		 1198 fws->fifo_credit[fifo] += credits;
1199}
1200
1201static void brcmf_fws_schedule_deq(struct brcmf_fws_info *fws)
1202{
1203 /* only schedule dequeue when there are credits for delayed traffic */
0a4254be
HM		 1204 if ((fws->fifo_credit_map & fws->fifo_delay_map) ||
1205 (!brcmf_fws_fc_active(fws) && fws->fifo_delay_map))
84bcc0c3
AS		 1206 queue_work(fws->fws_wq, &fws->fws_dequeue_work);
1207}
1208
84bcc0c3
AS		 1209static int brcmf_fws_enq(struct brcmf_fws_info *fws,
1210 enum brcmf_fws_skb_state state, int fifo,
1211 struct sk_buff *p)
1212{
1213 int prec = 2 * fifo;
1214 u32 *qfull_stat = &fws->stats.delayq_full_error;
84bcc0c3 1215 struct brcmf_fws_mac_descriptor *entry;
1e86d696
HM		 1216 struct pktq *pq;
1217 struct sk_buff_head *queue;
1218 struct sk_buff *p_head;
1219 struct sk_buff *p_tail;
1220 u32 fr_new;
1221 u32 fr_compare;
84bcc0c3
AS		 1222
1223 entry = brcmf_skbcb(p)->mac;
1224 if (entry == NULL) {
1225 brcmf_err("no mac descriptor found for skb %p\n", p);
1226 return -ENOENT;
1227 }
1228
8071fd61 1229 brcmf_dbg(DATA, "enter: fifo %d skb %p\n", fifo, p);
84bcc0c3
AS		 1230 if (state == BRCMF_FWS_SKBSTATE_SUPPRESSED) {
1231 prec += 1;
1232 qfull_stat = &fws->stats.supprq_full_error;
84bcc0c3 1233
1e86d696
HM		 1234 /* Fix out of order delivery of frames. Dont assume frame */
1235 /* can be inserted at the end, but look for correct position */
1236 pq = &entry->psq;
1237 if (pktq_full(pq) || pktq_pfull(pq, prec)) {
1238 *qfull_stat += 1;
1239 return -ENFILE;
1240 }
1241 queue = &pq->q[prec].skblist;
1242
1243 p_head = skb_peek(queue);
1244 p_tail = skb_peek_tail(queue);
1245 fr_new = brcmf_skb_htod_tag_get_field(p, FREERUN);
1246
1247 while (p_head != p_tail) {
1248 fr_compare = brcmf_skb_htod_tag_get_field(p_tail,
1249 FREERUN);
1250 /* be sure to handle wrap of 256 */
1251 if (((fr_new > fr_compare) &&
1252 ((fr_new - fr_compare) < 128)) ||
1253 ((fr_new < fr_compare) &&
1254 ((fr_compare - fr_new) > 128)))
1255 break;
1256 p_tail = skb_queue_prev(queue, p_tail);
1257 }
1258 /* Position found. Determine what to do */
1259 if (p_tail == NULL) {
1260 /* empty list */
1261 __skb_queue_tail(queue, p);
1262 } else {
1263 fr_compare = brcmf_skb_htod_tag_get_field(p_tail,
1264 FREERUN);
1265 if (((fr_new > fr_compare) &&
1266 ((fr_new - fr_compare) < 128)) ||
1267 ((fr_new < fr_compare) &&
1268 ((fr_compare - fr_new) > 128))) {
1269 /* After tail */
1270 __skb_queue_after(queue, p_tail, p);
1271 } else {
1272 /* Before tail */
1273 __skb_insert(p, p_tail->prev, p_tail, queue);
1274 }
1275 }
1276
1277 /* Complete the counters and statistics */
1278 pq->len++;
1279 if (pq->hi_prec < prec)
1280 pq->hi_prec = (u8) prec;
1281 } else if (brcmu_pktq_penq(&entry->psq, prec, p) == NULL) {
84bcc0c3
AS		 1282 *qfull_stat += 1;
1283 return -ENFILE;
1284 }
1285
1286 /* increment total enqueued packet count */
1287 fws->fifo_delay_map |= 1 << fifo;
1288 fws->fifo_enqpkt[fifo]++;
1289
1290 /* update the sk_buff state */
1291 brcmf_skbcb(p)->state = state;
84bcc0c3
AS		 1292
1293 /*
1294 * A packet has been pushed so update traffic
1295 * availability bitmap, if applicable
1296 */
c7773fc1 1297 brcmf_fws_tim_update(fws, entry, fifo, true);
84bcc0c3
AS		 1298 brcmf_fws_flow_control_check(fws, &entry->psq,
1299 brcmf_skb_if_flags_get_field(p, INDEX));
1300 return 0;
1301}
1302
1303static struct sk_buff *brcmf_fws_deq(struct brcmf_fws_info *fws, int fifo)
1304{
1305 struct brcmf_fws_mac_descriptor *table;
1306 struct brcmf_fws_mac_descriptor *entry;
1307 struct sk_buff *p;
84bcc0c3
AS		 1308 int num_nodes;
1309 int node_pos;
1310 int prec_out;
07529d20 1311 int pmsk;
84bcc0c3
AS		 1312 int i;
1313
1314 table = (struct brcmf_fws_mac_descriptor *)&fws->desc;
1315 num_nodes = sizeof(fws->desc) / sizeof(struct brcmf_fws_mac_descriptor);
1316 node_pos = fws->deq_node_pos[fifo];
1317
1318 for (i = 0; i < num_nodes; i++) {
1319 entry = &table[(node_pos + i) % num_nodes];
b75c1a30 1320 if (!entry->occupied ||
1ab083a3 1321 brcmf_fws_macdesc_closed(fws, entry, fifo))
84bcc0c3
AS		 1322 continue;
1323
1324 if (entry->suppressed)
1325 pmsk = 2;
07529d20
AS		 1326 else
1327 pmsk = 3;
84bcc0c3
AS		 1328 p = brcmu_pktq_mdeq(&entry->psq, pmsk << (fifo * 2), &prec_out);
1329 if (p == NULL) {
1330 if (entry->suppressed) {
8c5140f6
HM		 1331 if (entry->suppr_transit_count)
1332 continue;
84bcc0c3
AS		 1333 entry->suppressed = false;
1334 p = brcmu_pktq_mdeq(&entry->psq,
1335 1 << (fifo * 2), &prec_out);
1336 }
1337 }
1338 if (p == NULL)
1339 continue;
1340
fa587d4b 1341 brcmf_fws_macdesc_use_req_credit(entry, p);
84bcc0c3
AS		 1342
1343 /* move dequeue position to ensure fair round-robin */
1344 fws->deq_node_pos[fifo] = (node_pos + i + 1) % num_nodes;
1345 brcmf_fws_flow_control_check(fws, &entry->psq,
1346 brcmf_skb_if_flags_get_field(p,
1347 INDEX)
1348 );
1349 /*
1350 * A packet has been picked up, update traffic
1351 * availability bitmap, if applicable
1352 */
c7773fc1 1353 brcmf_fws_tim_update(fws, entry, fifo, false);
84bcc0c3
AS		 1354
1355 /*
1356 * decrement total enqueued fifo packets and
1357 * clear delay bitmap if done.
1358 */
1359 fws->fifo_enqpkt[fifo]--;
1360 if (fws->fifo_enqpkt[fifo] == 0)
1361 fws->fifo_delay_map &= ~(1 << fifo);
1362 goto done;
1363 }
1364 p = NULL;
1365done:
8071fd61 1366 brcmf_dbg(DATA, "exit: fifo %d skb %p\n", fifo, p);
84bcc0c3
AS		 1367 return p;
1368}
1369
1370static int brcmf_fws_txstatus_suppressed(struct brcmf_fws_info *fws, int fifo,
1e86d696
HM		 1371 struct sk_buff *skb, u32 genbit,
1372 u16 seq)
84bcc0c3
AS		 1373{
1374 struct brcmf_fws_mac_descriptor *entry = brcmf_skbcb(skb)->mac;
1375 u32 hslot;
1376 int ret;
2747e5f7 1377 u8 ifidx;
84bcc0c3
AS		 1378
1379 hslot = brcmf_skb_htod_tag_get_field(skb, HSLOT);
1380
1381 /* this packet was suppressed */
be4910ad 1382 if (!entry->suppressed) {
84bcc0c3 1383 entry->suppressed = true;
84bcc0c3 1384 entry->suppr_transit_count = entry->transit_count;
8c5140f6
HM		 1385 brcmf_dbg(DATA, "suppress %s: transit %d\n",
1386 entry->name, entry->transit_count);
84bcc0c3
AS		 1387 }
1388
1389 entry->generation = genbit;
1390
2747e5f7
HM		 1391 ret = brcmf_proto_hdrpull(fws->drvr, false, &ifidx, skb);
1392 if (ret == 0)
1e86d696
HM		 1393 brcmf_skb_htod_tag_set_field(skb, GENERATION, genbit);
1394 brcmf_skbcb(skb)->htod_seq = seq;
1395 if (brcmf_skb_htod_seq_get_field(skb, FROMFW)) {
1396 brcmf_skb_htod_seq_set_field(skb, FROMDRV, 1);
1397 brcmf_skb_htod_seq_set_field(skb, FROMFW, 0);
1398 } else {
1399 brcmf_skb_htod_seq_set_field(skb, FROMDRV, 0);
1400 }
2747e5f7
HM		 1401 ret = brcmf_fws_enq(fws, BRCMF_FWS_SKBSTATE_SUPPRESSED, fifo,
1402 skb);
84bcc0c3 1403 if (ret != 0) {
2747e5f7 1404 /* suppress q is full or hdrpull failed, drop this packet */
84bcc0c3
AS		 1405 brcmf_fws_hanger_poppkt(&fws->hanger, hslot, &skb,
1406 true);
1407 } else {
1408 /*
1409 * Mark suppressed to avoid a double free during
1410 * wlfc cleanup
1411 */
be4910ad 1412 brcmf_fws_hanger_mark_suppressed(&fws->hanger, hslot);
84bcc0c3
AS		 1413 }
1414
1415 return ret;
1416}
1417
3edc1cff 1418static int
8071fd61 1419brcmf_fws_txs_process(struct brcmf_fws_info *fws, u8 flags, u32 hslot,
1e86d696 1420 u32 genbit, u16 seq)
3edc1cff 1421{
84bcc0c3 1422 u32 fifo;
3edc1cff 1423 int ret;
84bcc0c3 1424 bool remove_from_hanger = true;
3edc1cff 1425 struct sk_buff *skb;
8071fd61 1426 struct brcmf_skbuff_cb *skcb;
3edc1cff
AS		 1427 struct brcmf_fws_mac_descriptor *entry = NULL;
1428
8071fd61 1429 brcmf_dbg(DATA, "flags %d\n", flags);
3edc1cff
AS		 1430
1431 if (flags == BRCMF_FWS_TXSTATUS_DISCARD)
1432 fws->stats.txs_discard++;
84bcc0c3
AS		 1433 else if (flags == BRCMF_FWS_TXSTATUS_CORE_SUPPRESS) {
1434 fws->stats.txs_supp_core++;
1435 remove_from_hanger = false;
1436 } else if (flags == BRCMF_FWS_TXSTATUS_FW_PS_SUPPRESS) {
1437 fws->stats.txs_supp_ps++;
1438 remove_from_hanger = false;
5631becb 1439 } else if (flags == BRCMF_FWS_TXSTATUS_FW_TOSSED)
3edc1cff 1440 fws->stats.txs_tossed++;
5631becb
AS		 1441 else if (flags == BRCMF_FWS_TXSTATUS_HOST_TOSSED)
1442 fws->stats.txs_host_tossed++;
3edc1cff
AS		 1443 else
1444 brcmf_err("unexpected txstatus\n");
1445
1446 ret = brcmf_fws_hanger_poppkt(&fws->hanger, hslot, &skb,
84bcc0c3 1447 remove_from_hanger);
3edc1cff
AS		 1448 if (ret != 0) {
1449 brcmf_err("no packet in hanger slot: hslot=%d\n", hslot);
1450 return ret;
1451 }
1452
8071fd61
AS		 1453 skcb = brcmf_skbcb(skb);
1454 entry = skcb->mac;
3edc1cff 1455 if (WARN_ON(!entry)) {
84bcc0c3
AS		 1456 brcmu_pkt_buf_free_skb(skb);
1457 return -EINVAL;
3edc1cff 1458 }
8c5140f6
HM		 1459 entry->transit_count--;
1460 if (entry->suppressed && entry->suppr_transit_count)
1461 entry->suppr_transit_count--;
3edc1cff 1462
1e86d696
HM		 1463 brcmf_dbg(DATA, "%s flags %d htod %X seq %X\n", entry->name, flags,
1464 skcb->htod, seq);
8071fd61 1465
84bcc0c3
AS		 1466 /* pick up the implicit credit from this packet */
1467 fifo = brcmf_skb_htod_tag_get_field(skb, FIFO);
fa587d4b
HM		 1468 if ((fws->fcmode == BRCMF_FWS_FCMODE_IMPLIED_CREDIT) ||
1469 (brcmf_skb_if_flags_get_field(skb, REQ_CREDIT)) ||
1470 (flags == BRCMF_FWS_TXSTATUS_HOST_TOSSED)) {
1471 brcmf_fws_return_credits(fws, fifo, 1);
1472 brcmf_fws_schedule_deq(fws);
1473 }
1474 brcmf_fws_macdesc_return_req_credit(skb);
3edc1cff 1475
84bcc0c3 1476 if (!remove_from_hanger)
1e86d696
HM		 1477 ret = brcmf_fws_txstatus_suppressed(fws, fifo, skb, genbit,
1478 seq);
84bcc0c3 1479
8c5140f6 1480 if (remove_from_hanger || ret)
84bcc0c3 1481 brcmf_txfinalize(fws->drvr, skb, true);
8c5140f6 1482
84bcc0c3
AS		 1483 return 0;
1484}
1485
1486static int brcmf_fws_fifocreditback_indicate(struct brcmf_fws_info *fws,
1487 u8 *data)
1488{
1489 int i;
1490
1491 if (fws->fcmode != BRCMF_FWS_FCMODE_EXPLICIT_CREDIT) {
1492 brcmf_dbg(INFO, "ignored\n");
a5e9d805 1493 return BRCMF_FWS_RET_OK_NOSCHEDULE;
84bcc0c3
AS		 1494 }
1495
8071fd61 1496 brcmf_dbg(DATA, "enter: data %pM\n", data);
3f4f910f 1497 brcmf_fws_lock(fws);
84bcc0c3
AS		 1498 for (i = 0; i < BRCMF_FWS_FIFO_COUNT; i++)
1499 brcmf_fws_return_credits(fws, i, data[i]);
1500
8071fd61 1501 brcmf_dbg(DATA, "map: credit %x delay %x\n", fws->fifo_credit_map,
84bcc0c3 1502 fws->fifo_delay_map);
3f4f910f 1503 brcmf_fws_unlock(fws);
a5e9d805 1504 return BRCMF_FWS_RET_OK_SCHEDULE;
3edc1cff
AS		 1505}
1506
0f8b5cc5
AS		 1507static int brcmf_fws_txstatus_indicate(struct brcmf_fws_info *fws, u8 *data)
1508{
a2ffc566 1509 __le32 status_le;
1e86d696 1510 __le16 seq_le;
0f8b5cc5
AS		 1511 u32 status;
1512 u32 hslot;
84bcc0c3 1513 u32 genbit;
0f8b5cc5 1514 u8 flags;
1e86d696 1515 u16 seq;
0f8b5cc5
AS		 1516
1517 fws->stats.txs_indicate++;
a2ffc566
AS		 1518 memcpy(&status_le, data, sizeof(status_le));
1519 status = le32_to_cpu(status_le);
0f8b5cc5
AS		 1520 flags = brcmf_txstatus_get_field(status, FLAGS);
1521 hslot = brcmf_txstatus_get_field(status, HSLOT);
84bcc0c3 1522 genbit = brcmf_txstatus_get_field(status, GENERATION);
1e86d696
HM		 1523 if (BRCMF_FWS_MODE_GET_REUSESEQ(fws->mode)) {
1524 memcpy(&seq_le, &data[BRCMF_FWS_TYPE_PKTTAG_LEN],
1525 sizeof(seq_le));
1526 seq = le16_to_cpu(seq_le);
1527 } else {
1528 seq = 0;
1529 }
0f8b5cc5 1530
3f4f910f 1531 brcmf_fws_lock(fws);
1e86d696 1532 brcmf_fws_txs_process(fws, flags, hslot, genbit, seq);
3f4f910f 1533 brcmf_fws_unlock(fws);
c6a681ab 1534 return BRCMF_FWS_RET_OK_NOSCHEDULE;
0f8b5cc5
AS		 1535}
1536
349e7104
AS		 1537static int brcmf_fws_dbg_seqnum_check(struct brcmf_fws_info *fws, u8 *data)
1538{
1539 __le32 timestamp;
1540
1541 memcpy(&timestamp, &data[2], sizeof(timestamp));
8071fd61 1542 brcmf_dbg(CTL, "received: seq %d, timestamp %d\n", data[1],
349e7104
AS		 1543 le32_to_cpu(timestamp));
1544 return 0;
1545}
1546
43fa635e
AS		 1547static int brcmf_fws_notify_credit_map(struct brcmf_if *ifp,
1548 const struct brcmf_event_msg *e,
1549 void *data)
1550{
1551 struct brcmf_fws_info *fws = ifp->drvr->fws;
1552 int i;
43fa635e
AS		 1553 u8 *credits = data;
1554
84bcc0c3
AS		 1555 if (e->datalen < BRCMF_FWS_FIFO_COUNT) {
1556 brcmf_err("event payload too small (%d)\n", e->datalen);
1557 return -EINVAL;
1558 }
0d24b0ea
HM		 1559 if (fws->creditmap_received)
1560 return 0;
1561
1562 fws->creditmap_received = true;
84bcc0c3
AS		 1563
1564 brcmf_dbg(TRACE, "enter: credits %pM\n", credits);
3f4f910f 1565 brcmf_fws_lock(fws);
84bcc0c3
AS		 1566 for (i = 0; i < ARRAY_SIZE(fws->fifo_credit); i++) {
1567 if (*credits)
1568 fws->fifo_credit_map |= 1 << i;
1569 else
1570 fws->fifo_credit_map &= ~(1 << i);
43fa635e 1571 fws->fifo_credit[i] = *credits++;
84bcc0c3
AS		 1572 }
1573 brcmf_fws_schedule_deq(fws);
3f4f910f 1574 brcmf_fws_unlock(fws);
43fa635e
AS		 1575 return 0;
1576}
1577
7d747037
HM		 1578static int brcmf_fws_notify_bcmc_credit_support(struct brcmf_if *ifp,
1579 const struct brcmf_event_msg *e,
1580 void *data)
1581{
1582 struct brcmf_fws_info *fws = ifp->drvr->fws;
7d747037 1583
3f4f910f 1584 brcmf_fws_lock(fws);
7d747037
HM		 1585 if (fws)
1586 fws->bcmc_credit_check = true;
3f4f910f 1587 brcmf_fws_unlock(fws);
7d747037
HM		 1588 return 0;
1589}
1590
349e7104
AS		 1591int brcmf_fws_hdrpull(struct brcmf_pub *drvr, int ifidx, s16 signal_len,
1592 struct sk_buff *skb)
1593{
87edd891 1594 struct brcmf_skb_reorder_data *rd;
349e7104 1595 struct brcmf_fws_info *fws = drvr->fws;
349e7104
AS		 1596 u8 *signal_data;
1597 s16 data_len;
1598 u8 type;
1599 u8 len;
1600 u8 *data;
a5e9d805
AS		 1601 s32 status;
1602 s32 err;
349e7104 1603
8071fd61 1604 brcmf_dbg(HDRS, "enter: ifidx %d, skblen %u, sig %d\n",
349e7104
AS		 1605 ifidx, skb->len, signal_len);
1606
1607 WARN_ON(signal_len > skb->len);
1608
0a4254be
HM		 1609 if (!signal_len)
1610 return 0;
349e7104 1611 /* if flow control disabled, skip to packet data and leave */
0a4254be 1612 if (!fws->fw_signals) {
349e7104
AS		 1613 skb_pull(skb, signal_len);
1614 return 0;
1615 }
1616
349e7104
AS		 1617 fws->stats.header_pulls++;
1618 data_len = signal_len;
1619 signal_data = skb->data;
1620
a5e9d805 1621 status = BRCMF_FWS_RET_OK_NOSCHEDULE;
349e7104
AS		 1622 while (data_len > 0) {
1623 /* extract tlv info */
1624 type = signal_data[0];
1625
1626 /* FILLER type is actually not a TLV, but
1627 * a single byte that can be skipped.
1628 */
1629 if (type == BRCMF_FWS_TYPE_FILLER) {
1630 signal_data += 1;
1631 data_len -= 1;
1632 continue;
1633 }
1634 len = signal_data[1];
1635 data = signal_data + 2;
1636
8071fd61
AS		 1637 brcmf_dbg(HDRS, "tlv type=%s (%d), len=%d (%d)\n",
1638 brcmf_fws_get_tlv_name(type), type, len,
1639 brcmf_fws_get_tlv_len(fws, type));
2af15580 1640
349e7104
AS		 1641 /* abort parsing when length invalid */
1642 if (data_len < len + 2)
1643 break;
1644
f55d94a6 1645 if (len < brcmf_fws_get_tlv_len(fws, type))
bb8c8063
AS		 1646 break;
1647
a5e9d805 1648 err = BRCMF_FWS_RET_OK_NOSCHEDULE;
349e7104 1649 switch (type) {
bb8c8063 1650 case BRCMF_FWS_TYPE_COMP_TXSTATUS:
ce814c1b 1651 break;
87edd891
AS		 1652 case BRCMF_FWS_TYPE_HOST_REORDER_RXPKTS:
1653 rd = (struct brcmf_skb_reorder_data *)skb->cb;
1654 rd->reorder = data;
1655 break;
bb8c8063
AS		 1656 case BRCMF_FWS_TYPE_MACDESC_ADD:
1657 case BRCMF_FWS_TYPE_MACDESC_DEL:
ce814c1b 1658 brcmf_fws_macdesc_indicate(fws, type, data);
bb8c8063 1659 break;
33753d47
AS		 1660 case BRCMF_FWS_TYPE_MAC_OPEN:
1661 case BRCMF_FWS_TYPE_MAC_CLOSE:
a5e9d805 1662 err = brcmf_fws_macdesc_state_indicate(fws, type, data);
33753d47
AS		 1663 break;
1664 case BRCMF_FWS_TYPE_INTERFACE_OPEN:
1665 case BRCMF_FWS_TYPE_INTERFACE_CLOSE:
a5e9d805
AS		 1666 err = brcmf_fws_interface_state_indicate(fws, type,
1667 data);
33753d47 1668 break;
5f38b683
AS		 1669 case BRCMF_FWS_TYPE_MAC_REQUEST_CREDIT:
1670 case BRCMF_FWS_TYPE_MAC_REQUEST_PACKET:
a5e9d805 1671 err = brcmf_fws_request_indicate(fws, type, data);
5f38b683 1672 break;
3edc1cff
AS		 1673 case BRCMF_FWS_TYPE_TXSTATUS:
1674 brcmf_fws_txstatus_indicate(fws, data);
1675 break;
84bcc0c3 1676 case BRCMF_FWS_TYPE_FIFO_CREDITBACK:
a5e9d805 1677 err = brcmf_fws_fifocreditback_indicate(fws, data);
84bcc0c3 1678 break;
bb8c8063
AS		 1679 case BRCMF_FWS_TYPE_RSSI:
1680 brcmf_fws_rssi_indicate(fws, *data);
349e7104
AS		 1681 break;
1682 case BRCMF_FWS_TYPE_TRANS_ID:
349e7104
AS		 1683 brcmf_fws_dbg_seqnum_check(fws, data);
1684 break;
84bcc0c3
AS		 1685 case BRCMF_FWS_TYPE_PKTTAG:
1686 case BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP:
349e7104
AS		 1687 default:
1688 fws->stats.tlv_invalid_type++;
1689 break;
1690 }
a5e9d805
AS		 1691 if (err == BRCMF_FWS_RET_OK_SCHEDULE)
1692 status = BRCMF_FWS_RET_OK_SCHEDULE;
349e7104
AS		 1693 signal_data += len + 2;
1694 data_len -= len + 2;
1695 }
1696
1697 if (data_len != 0)
1698 fws->stats.tlv_parse_failed++;
1699
a5e9d805
AS		 1700 if (status == BRCMF_FWS_RET_OK_SCHEDULE)
1701 brcmf_fws_schedule_deq(fws);
1702
349e7104
AS		 1703 /* signalling processing result does
1704 * not affect the actual ethernet packet.
1705 */
1706 skb_pull(skb, signal_len);
1707
1708 /* this may be a signal-only packet
1709 */
1710 if (skb->len == 0)
1711 fws->stats.header_only_pkt++;
1712
349e7104
AS		 1713 return 0;
1714}
bb8c8063 1715
456d0685 1716static void brcmf_fws_precommit_skb(struct brcmf_fws_info *fws, int fifo,
3edc1cff
AS		 1717 struct sk_buff *p)
1718{
1719 struct brcmf_skbuff_cb *skcb = brcmf_skbcb(p);
1720 struct brcmf_fws_mac_descriptor *entry = skcb->mac;
3edc1cff
AS		 1721 u8 flags;
1722
1e86d696
HM		 1723 if (skcb->state != BRCMF_FWS_SKBSTATE_SUPPRESSED)
1724 brcmf_skb_htod_tag_set_field(p, GENERATION, entry->generation);
be4910ad 1725 flags = BRCMF_FWS_HTOD_FLAG_PKTFROMHOST;
fa587d4b 1726 if (brcmf_skb_if_flags_get_field(p, REQUESTED)) {
be4910ad
HM		 1727 /*
1728 * Indicate that this packet is being sent in response to an
1729 * explicit request from the firmware side.
1730 */
1731 flags |= BRCMF_FWS_HTOD_FLAG_PKT_REQUESTED;
1732 }
1733 brcmf_skb_htod_tag_set_field(p, FLAGS, flags);
456d0685 1734 brcmf_fws_hdrpush(fws, p);
3edc1cff
AS		 1735}
1736
456d0685
AS		 1737static void brcmf_fws_rollback_toq(struct brcmf_fws_info *fws,
1738 struct sk_buff *skb, int fifo)
84bcc0c3 1739{
84bcc0c3 1740 struct brcmf_fws_mac_descriptor *entry;
84bcc0c3 1741 struct sk_buff *pktout;
456d0685 1742 int qidx, hslot;
84bcc0c3 1743 int rc = 0;
84bcc0c3 1744
84bcc0c3 1745 entry = brcmf_skbcb(skb)->mac;
456d0685
AS		 1746 if (entry->occupied) {
1747 qidx = 2 * fifo;
1748 if (brcmf_skbcb(skb)->state == BRCMF_FWS_SKBSTATE_SUPPRESSED)
1749 qidx++;
1750
1751 pktout = brcmu_pktq_penq_head(&entry->psq, qidx, skb);
1752 if (pktout == NULL) {
1753 brcmf_err("%s queue %d full\n", entry->name, qidx);
1754 rc = -ENOSPC;
84bcc0c3 1755 }
84bcc0c3 1756 } else {
456d0685 1757 brcmf_err("%s entry removed\n", entry->name);
84bcc0c3
AS		 1758 rc = -ENOENT;
1759 }
1760
67994fa2 1761 if (rc) {
84bcc0c3 1762 fws->stats.rollback_failed++;
456d0685 1763 hslot = brcmf_skb_htod_tag_get_field(skb, HSLOT);
fa587d4b 1764 brcmf_fws_txs_process(fws, BRCMF_FWS_TXSTATUS_HOST_TOSSED,
1e86d696 1765 hslot, 0, 0);
289ec1c7 1766 } else {
84bcc0c3 1767 fws->stats.rollback_success++;
fa587d4b
HM		 1768 brcmf_fws_return_credits(fws, fifo, 1);
1769 brcmf_fws_macdesc_return_req_credit(skb);
289ec1c7 1770 }
84bcc0c3
AS		 1771}
1772
1aac1e91
AS		 1773static int brcmf_fws_borrow_credit(struct brcmf_fws_info *fws)
1774{
1775 int lender_ac;
1776
afc3bbfc
HM		 1777 if (time_after(fws->borrow_defer_timestamp, jiffies)) {
1778 fws->fifo_credit_map &= ~(1 << BRCMF_FWS_FIFO_AC_BE);
1aac1e91 1779 return -ENAVAIL;
afc3bbfc 1780 }
1aac1e91
AS		 1781
1782 for (lender_ac = 0; lender_ac <= BRCMF_FWS_FIFO_AC_VO; lender_ac++) {
1783 if (fws->fifo_credit[lender_ac]) {
1784 fws->credits_borrowed[lender_ac]++;
1785 fws->fifo_credit[lender_ac]--;
1786 if (fws->fifo_credit[lender_ac] == 0)
1787 fws->fifo_credit_map &= ~(1 << lender_ac);
afc3bbfc 1788 fws->fifo_credit_map |= (1 << BRCMF_FWS_FIFO_AC_BE);
8071fd61 1789 brcmf_dbg(DATA, "borrow credit from: %d\n", lender_ac);
1aac1e91
AS		 1790 return 0;
1791 }
1792 }
afc3bbfc 1793 fws->fifo_credit_map &= ~(1 << BRCMF_FWS_FIFO_AC_BE);
1aac1e91
AS		 1794 return -ENAVAIL;
1795}
1796
3edc1cff
AS		 1797static int brcmf_fws_commit_skb(struct brcmf_fws_info *fws, int fifo,
1798 struct sk_buff *skb)
1799{
1800 struct brcmf_skbuff_cb *skcb = brcmf_skbcb(skb);
1801 struct brcmf_fws_mac_descriptor *entry;
1802 struct brcmf_bus *bus = fws->drvr->bus_if;
1803 int rc;
2747e5f7 1804 u8 ifidx;
3edc1cff
AS		 1805
1806 entry = skcb->mac;
1807 if (IS_ERR(entry))
1808 return PTR_ERR(entry);
1809
456d0685 1810 brcmf_fws_precommit_skb(fws, fifo, skb);
3f4f910f
HM		 1811 entry->transit_count++;
1812 if (entry->suppressed)
1813 entry->suppr_transit_count++;
1814 brcmf_fws_unlock(fws);
3edc1cff 1815 rc = brcmf_bus_txdata(bus, 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);
28a905b5 1867 bool pae = eh->h_proto == htons(ETH_P_PAE);
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)
1872 skb->priority = cfg80211_classify8021d(skb);
1873
1874 drvr->tx_multicast += !!multicast;
28a905b5 1875 if (pae)
3edc1cff
AS		 1876 atomic_inc(&ifp->pend_8021x_cnt);
1877
3edc1cff 1878 /* set control buffer information */
84bcc0c3 1879 skcb->if_flags = 0;
3edc1cff 1880 skcb->state = BRCMF_FWS_SKBSTATE_NEW;
31ed07dc 1881 brcmf_skb_if_flags_set_field(skb, INDEX, ifp->ifidx);
3edc1cff
AS		 1882 if (!multicast)
1883 fifo = brcmf_fws_prio2fifo[skb->priority];
3edc1cff 1884
3f4f910f 1885 brcmf_fws_lock(fws);
20863746
AS		 1886 if (fifo != BRCMF_FWS_FIFO_AC_BE && fifo < BRCMF_FWS_FIFO_BCMC)
1887 fws->borrow_defer_timestamp = jiffies +
1888 BRCMF_FWS_BORROW_DEFER_PERIOD;
456d0685
AS		 1889
1890 skcb->mac = brcmf_fws_macdesc_find(fws, ifp, eh->h_dest);
1891 brcmf_dbg(DATA, "%s mac %pM multi %d fifo %d\n", skcb->mac->name,
1892 eh->h_dest, multicast, fifo);
1893 if (!brcmf_fws_assign_htod(fws, skb, fifo)) {
1894 brcmf_fws_enq(fws, BRCMF_FWS_SKBSTATE_DELAYED, fifo, skb);
1895 brcmf_fws_schedule_deq(fws);
1896 } else {
1897 brcmf_err("drop skb: no hanger slot\n");
28a905b5
AS		 1898 if (pae) {
1899 atomic_dec(&ifp->pend_8021x_cnt);
1900 if (waitqueue_active(&ifp->pend_8021x_wait))
1901 wake_up(&ifp->pend_8021x_wait);
1902 }
456d0685
AS		 1903 brcmu_pkt_buf_free_skb(skb);
1904 }
3f4f910f 1905 brcmf_fws_unlock(fws);
3edc1cff
AS		 1906 return 0;
1907}
1908
bb8c8063
AS		 1909void brcmf_fws_reset_interface(struct brcmf_if *ifp)
1910{
1911 struct brcmf_fws_mac_descriptor *entry = ifp->fws_desc;
1912
1913 brcmf_dbg(TRACE, "enter: idx=%d\n", ifp->bssidx);
1914 if (!entry)
1915 return;
1916
1ab083a3 1917 brcmf_fws_macdesc_init(entry, ifp->mac_addr, ifp->ifidx);
bb8c8063
AS		 1918}
1919
1920void brcmf_fws_add_interface(struct brcmf_if *ifp)
1921{
84bcc0c3 1922 struct brcmf_fws_info *fws = ifp->drvr->fws;
bb8c8063
AS		 1923 struct brcmf_fws_mac_descriptor *entry;
1924
0a4254be 1925 if (!ifp->ndev)
bb8c8063
AS		 1926 return;
1927
84bcc0c3
AS		 1928 entry = &fws->desc.iface[ifp->ifidx];
1929 ifp->fws_desc = entry;
1ab083a3 1930 brcmf_fws_macdesc_init(entry, ifp->mac_addr, ifp->ifidx);
8071fd61 1931 brcmf_fws_macdesc_set_name(fws, entry);
84bcc0c3
AS		 1932 brcmu_pktq_init(&entry->psq, BRCMF_FWS_PSQ_PREC_COUNT,
1933 BRCMF_FWS_PSQ_LEN);
8071fd61 1934 brcmf_dbg(TRACE, "added %s\n", entry->name);
bb8c8063
AS		 1935}
1936
1937void brcmf_fws_del_interface(struct brcmf_if *ifp)
1938{
1939 struct brcmf_fws_mac_descriptor *entry = ifp->fws_desc;
1940
bb8c8063
AS		 1941 if (!entry)
1942 return;
1943
3f4f910f 1944 brcmf_fws_lock(ifp->drvr->fws);
bb8c8063 1945 ifp->fws_desc = NULL;
8071fd61 1946 brcmf_dbg(TRACE, "deleting %s\n", entry->name);
1ab083a3 1947 brcmf_fws_macdesc_deinit(entry);
a3e993c7 1948 brcmf_fws_cleanup(ifp->drvr->fws, ifp->ifidx);
3f4f910f 1949 brcmf_fws_unlock(ifp->drvr->fws);
84bcc0c3
AS		 1950}
1951
1952static void brcmf_fws_dequeue_worker(struct work_struct *worker)
1953{
1954 struct brcmf_fws_info *fws;
0a4254be 1955 struct brcmf_pub *drvr;
84bcc0c3 1956 struct sk_buff *skb;
84bcc0c3 1957 int fifo;
0a4254be
HM		 1958 u32 hslot;
1959 u32 ifidx;
1960 int ret;
84bcc0c3
AS		 1961
1962 fws = container_of(worker, struct brcmf_fws_info, fws_dequeue_work);
0a4254be 1963 drvr = fws->drvr;
84bcc0c3 1964
3f4f910f 1965 brcmf_fws_lock(fws);
2a5d7b02 1966 for (fifo = BRCMF_FWS_FIFO_BCMC; fifo >= 0 && !fws->bus_flow_blocked;
df50f756 1967 fifo--) {
0a4254be
HM		 1968 if (!brcmf_fws_fc_active(fws)) {
1969 while ((skb = brcmf_fws_deq(fws, fifo)) != NULL) {
1970 hslot = brcmf_skb_htod_tag_get_field(skb,
1971 HSLOT);
1972 brcmf_fws_hanger_poppkt(&fws->hanger, hslot,
1973 &skb, true);
1974 ifidx = brcmf_skb_if_flags_get_field(skb,
1975 INDEX);
1976 brcmf_proto_hdrpush(drvr, ifidx, 0, skb);
1977 /* Use bus module to send data frame */
3f4f910f 1978 brcmf_fws_unlock(fws);
0a4254be 1979 ret = brcmf_bus_txdata(drvr->bus_if, skb);
3f4f910f 1980 brcmf_fws_lock(fws);
0a4254be
HM		 1981 if (ret < 0)
1982 brcmf_txfinalize(drvr, skb, false);
1983 if (fws->bus_flow_blocked)
1984 break;
1985 }
1986 continue;
1987 }
7d747037
HM		 1988 while ((fws->fifo_credit[fifo]) || ((!fws->bcmc_credit_check) &&
1989 (fifo == BRCMF_FWS_FIFO_BCMC))) {
84bcc0c3 1990 skb = brcmf_fws_deq(fws, fifo);
289ec1c7 1991 if (!skb)
84bcc0c3 1992 break;
fa587d4b 1993 fws->fifo_credit[fifo]--;
289ec1c7
AS		 1994 if (brcmf_fws_commit_skb(fws, fifo, skb))
1995 break;
df50f756
HM		 1996 if (fws->bus_flow_blocked)
1997 break;
84bcc0c3 1998 }
1aac1e91 1999 if ((fifo == BRCMF_FWS_FIFO_AC_BE) &&
289ec1c7 2000 (fws->fifo_credit[fifo] == 0) &&
df50f756 2001 (!fws->bus_flow_blocked)) {
1aac1e91
AS		 2002 while (brcmf_fws_borrow_credit(fws) == 0) {
2003 skb = brcmf_fws_deq(fws, fifo);
2004 if (!skb) {
2005 brcmf_fws_return_credits(fws, fifo, 1);
2006 break;
2007 }
eb2410cd
HM		 2008 if (brcmf_fws_commit_skb(fws, fifo, skb))
2009 break;
df50f756
HM		 2010 if (fws->bus_flow_blocked)
2011 break;
1aac1e91 2012 }
1aac1e91 2013 }
84bcc0c3 2014 }
3f4f910f 2015 brcmf_fws_unlock(fws);
bb8c8063 2016}
c7f34a69 2017
d9337414
AS		 2018int brcmf_fws_init(struct brcmf_pub *drvr)
2019{
0a4254be 2020 struct brcmf_fws_info *fws;
290fb763 2021 u32 tlv = BRCMF_FWS_FLAGS_RSSI_SIGNALS;
d9337414 2022 int rc;
1e86d696 2023 u32 mode;
d9337414 2024
d9337414
AS		 2025 drvr->fws = kzalloc(sizeof(*(drvr->fws)), GFP_KERNEL);
2026 if (!drvr->fws) {
2027 rc = -ENOMEM;
2028 goto fail;
2029 }
2030
0a4254be 2031 fws = drvr->fws;
3f4f910f
HM		 2032
2033 spin_lock_init(&fws->spinlock);
2034
d9337414 2035 /* set linkage back */
0a4254be
HM		 2036 fws->drvr = drvr;
2037 fws->fcmode = fcmode;
d9337414 2038
0a4254be
HM		 2039 fws->fws_wq = create_singlethread_workqueue("brcmf_fws_wq");
2040 if (fws->fws_wq == NULL) {
84bcc0c3
AS		 2041 brcmf_err("workqueue creation failed\n");
2042 rc = -EBADF;
2043 goto fail;
2044 }
0a4254be 2045 INIT_WORK(&fws->fws_dequeue_work, brcmf_fws_dequeue_worker);
84bcc0c3 2046
290fb763 2047 /* enable firmware signalling if fcmode active */
0a4254be 2048 if (fws->fcmode != BRCMF_FWS_FCMODE_NONE)
290fb763 2049 tlv |= BRCMF_FWS_FLAGS_XONXOFF_SIGNALS |
33753d47 2050 BRCMF_FWS_FLAGS_CREDIT_STATUS_SIGNALS |
87edd891
AS		 2051 BRCMF_FWS_FLAGS_HOST_PROPTXSTATUS_ACTIVE |
2052 BRCMF_FWS_FLAGS_HOST_RXREORDER_ACTIVE;
290fb763 2053
a786b38d
AS		 2054 rc = brcmf_fweh_register(drvr, BRCMF_E_FIFO_CREDIT_MAP,
2055 brcmf_fws_notify_credit_map);
d9337414 2056 if (rc < 0) {
a786b38d 2057 brcmf_err("register credit map handler failed\n");
d9337414
AS		 2058 goto fail;
2059 }
7d747037
HM		 2060 rc = brcmf_fweh_register(drvr, BRCMF_E_BCMC_CREDIT_SUPPORT,
2061 brcmf_fws_notify_bcmc_credit_support);
2062 if (rc < 0) {
2063 brcmf_err("register bcmc credit handler failed\n");
2064 brcmf_fweh_unregister(drvr, BRCMF_E_FIFO_CREDIT_MAP);
2065 goto fail;
2066 }
d9337414 2067
0a4254be 2068 /* Setting the iovar may fail if feature is unsupported
a786b38d 2069 * so leave the rc as is so driver initialization can
0a4254be 2070 * continue. Set mode back to none indicating not enabled.
a786b38d 2071 */
0a4254be 2072 fws->fw_signals = true;
a786b38d
AS		 2073 if (brcmf_fil_iovar_int_set(drvr->iflist[0], "tlv", tlv)) {
2074 brcmf_err("failed to set bdcv2 tlv signaling\n");
0a4254be
HM		 2075 fws->fcmode = BRCMF_FWS_FCMODE_NONE;
2076 fws->fw_signals = false;
d9337414
AS		 2077 }
2078
87edd891
AS		 2079 if (brcmf_fil_iovar_int_set(drvr->iflist[0], "ampdu_hostreorder", 1))
2080 brcmf_dbg(INFO, "enabling AMPDU host-reorder failed\n");
2081
1e86d696
HM		 2082 /* Enable seq number reuse, if supported */
2083 if (brcmf_fil_iovar_int_get(drvr->iflist[0], "wlfc_mode", &mode) == 0) {
2084 if (BRCMF_FWS_MODE_GET_REUSESEQ(mode)) {
2085 mode = 0;
2086 BRCMF_FWS_MODE_SET_REUSESEQ(mode, 1);
2087 if (brcmf_fil_iovar_int_set(drvr->iflist[0],
2088 "wlfc_mode", mode) == 0) {
2089 BRCMF_FWS_MODE_SET_REUSESEQ(fws->mode, 1);
2090 }
2091 }
2092 }
2093
0a4254be
HM		 2094 brcmf_fws_hanger_init(&fws->hanger);
2095 brcmf_fws_macdesc_init(&fws->desc.other, NULL, 0);
2096 brcmf_fws_macdesc_set_name(fws, &fws->desc.other);
2097 brcmu_pktq_init(&fws->desc.other.psq, BRCMF_FWS_PSQ_PREC_COUNT,
84bcc0c3 2098 BRCMF_FWS_PSQ_LEN);
d9337414
AS		 2099
2100 /* create debugfs file for statistics */
0a4254be 2101 brcmf_debugfs_create_fws_stats(drvr, &fws->stats);
d9337414 2102
8071fd61 2103 brcmf_dbg(INFO, "%s bdcv2 tlv signaling [%x]\n",
0a4254be 2104 fws->fw_signals ? "enabled" : "disabled", tlv);
d9337414
AS		 2105 return 0;
2106
2107fail:
d9337414
AS		 2108 brcmf_fws_deinit(drvr);
2109 return rc;
2110}
2111
2112void brcmf_fws_deinit(struct brcmf_pub *drvr)
2113{
2114 struct brcmf_fws_info *fws = drvr->fws;
d9337414 2115
47829f4f
AS		 2116 if (!fws)
2117 return;
2118
a786b38d
AS		 2119 if (drvr->fws->fws_wq)
2120 destroy_workqueue(drvr->fws->fws_wq);
2121
d9337414 2122 /* cleanup */
3f4f910f 2123 brcmf_fws_lock(fws);
d9337414
AS		 2124 brcmf_fws_cleanup(fws, -1);
2125 drvr->fws = NULL;
3f4f910f 2126 brcmf_fws_unlock(fws);
d9337414
AS		 2127
2128 /* free top structure */
2129 kfree(fws);
2130}
2131
c7f34a69
AS		 2132bool brcmf_fws_fc_active(struct brcmf_fws_info *fws)
2133{
0a4254be 2134 if (!fws->creditmap_received)
c7f34a69
AS		 2135 return false;
2136
c7f34a69
AS		 2137 return fws->fcmode != BRCMF_FWS_FCMODE_NONE;
2138}
0f8b5cc5
AS		 2139
2140void brcmf_fws_bustxfail(struct brcmf_fws_info *fws, struct sk_buff *skb)
2141{
fa587d4b 2142 u32 hslot;
0f8b5cc5 2143
c7773fc1
AS		 2144 if (brcmf_skbcb(skb)->state == BRCMF_FWS_SKBSTATE_TIM) {
2145 brcmu_pkt_buf_free_skb(skb);
2146 return;
2147 }
3f4f910f 2148 brcmf_fws_lock(fws);
fa587d4b 2149 hslot = brcmf_skb_htod_tag_get_field(skb, HSLOT);
1e86d696 2150 brcmf_fws_txs_process(fws, BRCMF_FWS_TXSTATUS_HOST_TOSSED, hslot, 0, 0);
3f4f910f 2151 brcmf_fws_unlock(fws);
0f8b5cc5 2152}
df50f756
HM		 2153
2154void brcmf_fws_bus_blocked(struct brcmf_pub *drvr, bool flow_blocked)
2155{
2156 struct brcmf_fws_info *fws = drvr->fws;
2157
2158 fws->bus_flow_blocked = flow_blocked;
2159 if (!flow_blocked)
2160 brcmf_fws_schedule_deq(fws);
5631becb
AS		 2161 else
2162 fws->stats.bus_flow_block++;
df50f756 2163}
Linux 6.x block layer and io_uring tree(s)