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brcmfmac: schedule dequeue upon firmware-signal reception
[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
AS		 23#include <linux/err.h>
24#include <uapi/linux/nl80211.h>
3edc1cff 25#include <net/cfg80211.h>
349e7104
AS		 26
27#include <brcmu_utils.h>
28#include <brcmu_wifi.h>
29#include "dhd.h"
3edc1cff 30#include "dhd_proto.h"
349e7104 31#include "dhd_dbg.h"
e2432b67 32#include "dhd_bus.h"
349e7104 33#include "fwil.h"
a7965fbb 34#include "fwil_types.h"
349e7104
AS		 35#include "fweh.h"
36#include "fwsignal.h"
a7965fbb
AS		 37#include "p2p.h"
38#include "wl_cfg80211.h"
349e7104
AS		 39
40/**
41 * DOC: Firmware Signalling
42 *
43 * Firmware can send signals to host and vice versa, which are passed in the
44 * data packets using TLV based header. This signalling layer is on top of the
45 * BDC bus protocol layer.
46 */
47
48/*
49 * single definition for firmware-driver flow control tlv's.
50 *
51 * each tlv is specified by BRCMF_FWS_TLV_DEF(name, ID, length).
52 * A length value 0 indicates variable length tlv.
53 */
54#define BRCMF_FWS_TLV_DEFLIST \
55 BRCMF_FWS_TLV_DEF(MAC_OPEN, 1, 1) \
56 BRCMF_FWS_TLV_DEF(MAC_CLOSE, 2, 1) \
57 BRCMF_FWS_TLV_DEF(MAC_REQUEST_CREDIT, 3, 2) \
58 BRCMF_FWS_TLV_DEF(TXSTATUS, 4, 4) \
59 BRCMF_FWS_TLV_DEF(PKTTAG, 5, 4) \
60 BRCMF_FWS_TLV_DEF(MACDESC_ADD, 6, 8) \
61 BRCMF_FWS_TLV_DEF(MACDESC_DEL, 7, 8) \
62 BRCMF_FWS_TLV_DEF(RSSI, 8, 1) \
63 BRCMF_FWS_TLV_DEF(INTERFACE_OPEN, 9, 1) \
64 BRCMF_FWS_TLV_DEF(INTERFACE_CLOSE, 10, 1) \
94607238 65 BRCMF_FWS_TLV_DEF(FIFO_CREDITBACK, 11, 6) \
349e7104
AS		 66 BRCMF_FWS_TLV_DEF(PENDING_TRAFFIC_BMP, 12, 2) \
67 BRCMF_FWS_TLV_DEF(MAC_REQUEST_PACKET, 13, 3) \
68 BRCMF_FWS_TLV_DEF(HOST_REORDER_RXPKTS, 14, 10) \
69 BRCMF_FWS_TLV_DEF(TRANS_ID, 18, 6) \
70 BRCMF_FWS_TLV_DEF(COMP_TXSTATUS, 19, 1) \
71 BRCMF_FWS_TLV_DEF(FILLER, 255, 0)
72
3edc1cff 73/*
349e7104
AS		 74 * enum brcmf_fws_tlv_type - definition of tlv identifiers.
75 */
76#define BRCMF_FWS_TLV_DEF(name, id, len) \
77 BRCMF_FWS_TYPE_ ## name = id,
78enum brcmf_fws_tlv_type {
79 BRCMF_FWS_TLV_DEFLIST
80 BRCMF_FWS_TYPE_INVALID
81};
82#undef BRCMF_FWS_TLV_DEF
83
3edc1cff
AS		 84/*
85 * enum brcmf_fws_tlv_len - definition of tlv lengths.
86 */
87#define BRCMF_FWS_TLV_DEF(name, id, len) \
88 BRCMF_FWS_TYPE_ ## name ## _LEN = (len),
89enum brcmf_fws_tlv_len {
90 BRCMF_FWS_TLV_DEFLIST
91};
92#undef BRCMF_FWS_TLV_DEF
93
349e7104 94#ifdef DEBUG
3edc1cff 95/*
349e7104
AS		 96 * brcmf_fws_tlv_names - array of tlv names.
97 */
98#define BRCMF_FWS_TLV_DEF(name, id, len) \
99 { id, #name },
100static struct {
101 enum brcmf_fws_tlv_type id;
102 const char *name;
103} brcmf_fws_tlv_names[] = {
104 BRCMF_FWS_TLV_DEFLIST
105};
106#undef BRCMF_FWS_TLV_DEF
107
108static const char *brcmf_fws_get_tlv_name(enum brcmf_fws_tlv_type id)
109{
110 int i;
111
112 for (i = 0; i < ARRAY_SIZE(brcmf_fws_tlv_names); i++)
113 if (brcmf_fws_tlv_names[i].id == id)
114 return brcmf_fws_tlv_names[i].name;
115
116 return "INVALID";
117}
118#else
119static const char *brcmf_fws_get_tlv_name(enum brcmf_fws_tlv_type id)
120{
121 return "NODEBUG";
122}
123#endif /* DEBUG */
124
3edc1cff 125/*
349e7104
AS		 126 * flags used to enable tlv signalling from firmware.
127 */
bb8c8063
AS		 128#define BRCMF_FWS_FLAGS_RSSI_SIGNALS 0x0001
129#define BRCMF_FWS_FLAGS_XONXOFF_SIGNALS 0x0002
130#define BRCMF_FWS_FLAGS_CREDIT_STATUS_SIGNALS 0x0004
131#define BRCMF_FWS_FLAGS_HOST_PROPTXSTATUS_ACTIVE 0x0008
132#define BRCMF_FWS_FLAGS_PSQ_GENERATIONFSM_ENABLE 0x0010
133#define BRCMF_FWS_FLAGS_PSQ_ZERO_BUFFER_ENABLE 0x0020
134#define BRCMF_FWS_FLAGS_HOST_RXREORDER_ACTIVE 0x0040
135
349e7104 136#define BRCMF_FWS_MAC_DESC_TABLE_SIZE 32
349e7104
AS		 137#define BRCMF_FWS_MAC_DESC_ID_INVALID 0xff
138
139#define BRCMF_FWS_HOSTIF_FLOWSTATE_OFF 0
140#define BRCMF_FWS_HOSTIF_FLOWSTATE_ON 1
84bcc0c3
AS		 141#define BRCMF_FWS_FLOWCONTROL_HIWATER 128
142#define BRCMF_FWS_FLOWCONTROL_LOWATER 64
349e7104 143
bb8c8063
AS		 144#define BRCMF_FWS_PSQ_PREC_COUNT ((NL80211_NUM_ACS + 1) * 2)
145#define BRCMF_FWS_PSQ_LEN 256
146
3edc1cff
AS		 147#define BRCMF_FWS_HTOD_FLAG_PKTFROMHOST 0x01
148#define BRCMF_FWS_HTOD_FLAG_PKT_REQUESTED 0x02
149
a5e9d805
AS		 150#define BRCMF_FWS_RET_OK_NOSCHEDULE 0
151#define BRCMF_FWS_RET_OK_SCHEDULE 1
152
ebb93883
AS		 153/**
154 * enum brcmf_fws_skb_state - indicates processing state of skb.
3edc1cff
AS		 155 *
156 * @BRCMF_FWS_SKBSTATE_NEW: sk_buff is newly arrived in the driver.
157 * @BRCMF_FWS_SKBSTATE_DELAYED: sk_buff had to wait on queue.
158 * @BRCMF_FWS_SKBSTATE_SUPPRESSED: sk_buff has been suppressed by firmware.
ebb93883
AS		 159 */
160enum brcmf_fws_skb_state {
3edc1cff
AS		 161 BRCMF_FWS_SKBSTATE_NEW,
162 BRCMF_FWS_SKBSTATE_DELAYED,
163 BRCMF_FWS_SKBSTATE_SUPPRESSED
ebb93883
AS		 164};
165
166/**
167 * struct brcmf_skbuff_cb - control buffer associated with skbuff.
168 *
169 * @if_flags: holds interface index and packet related flags.
ebb93883 170 * @htod: host to device packet identifier (used in PKTTAG tlv).
ebb93883
AS		 171 * @state: transmit state of the packet.
172 * @mac: descriptor related to destination for this packet.
173 *
174 * This information is stored in control buffer struct sk_buff::cb, which
175 * provides 48 bytes of storage so this structure should not exceed that.
176 */
177struct brcmf_skbuff_cb {
178 u16 if_flags;
ebb93883 179 u32 htod;
ebb93883
AS		 180 enum brcmf_fws_skb_state state;
181 struct brcmf_fws_mac_descriptor *mac;
182};
183
3edc1cff 184/*
ebb93883
AS		 185 * macro casting skbuff control buffer to struct brcmf_skbuff_cb.
186 */
187#define brcmf_skbcb(skb) ((struct brcmf_skbuff_cb *)((skb)->cb))
188
3edc1cff 189/*
ebb93883
AS		 190 * sk_buff control if flags
191 *
192 * b[11] - packet sent upon firmware request.
193 * b[10] - packet only contains signalling data.
194 * b[9] - packet is a tx packet.
195 * b[8] - packet uses FIFO credit (non-pspoll).
196 * b[7] - interface in AP mode.
197 * b[6:4] - AC FIFO number.
198 * b[3:0] - interface index.
199 */
200#define BRCMF_SKB_IF_FLAGS_REQUESTED_MASK 0x0800
201#define BRCMF_SKB_IF_FLAGS_REQUESTED_SHIFT 11
202#define BRCMF_SKB_IF_FLAGS_SIGNAL_ONLY_MASK 0x0400
203#define BRCMF_SKB_IF_FLAGS_SIGNAL_ONLY_SHIFT 10
204#define BRCMF_SKB_IF_FLAGS_TRANSMIT_MASK 0x0200
205#define BRCMF_SKB_IF_FLAGS_TRANSMIT_SHIFT 9
206#define BRCMF_SKB_IF_FLAGS_CREDITCHECK_MASK 0x0100
207#define BRCMF_SKB_IF_FLAGS_CREDITCHECK_SHIFT 8
208#define BRCMF_SKB_IF_FLAGS_IF_AP_MASK 0x0080
209#define BRCMF_SKB_IF_FLAGS_IF_AP_SHIFT 7
210#define BRCMF_SKB_IF_FLAGS_FIFO_MASK 0x0070
211#define BRCMF_SKB_IF_FLAGS_FIFO_SHIFT 4
212#define BRCMF_SKB_IF_FLAGS_INDEX_MASK 0x000f
213#define BRCMF_SKB_IF_FLAGS_INDEX_SHIFT 0
214
215#define brcmf_skb_if_flags_set_field(skb, field, value) \
216 brcmu_maskset16(&(brcmf_skbcb(skb)->if_flags), \
217 BRCMF_SKB_IF_FLAGS_ ## field ## _MASK, \
218 BRCMF_SKB_IF_FLAGS_ ## field ## _SHIFT, (value))
219#define brcmf_skb_if_flags_get_field(skb, field) \
220 brcmu_maskget16(brcmf_skbcb(skb)->if_flags, \
221 BRCMF_SKB_IF_FLAGS_ ## field ## _MASK, \
222 BRCMF_SKB_IF_FLAGS_ ## field ## _SHIFT)
223
3edc1cff 224/*
ebb93883
AS		 225 * sk_buff control packet identifier
226 *
227 * 32-bit packet identifier used in PKTTAG tlv from host to dongle.
228 *
229 * - Generated at the host (e.g. dhd)
230 * - Seen as a generic sequence number by firmware except for the flags field.
231 *
232 * Generation : b[31] => generation number for this packet [host->fw]
233 * OR, current generation number [fw->host]
234 * Flags : b[30:27] => command, status flags
235 * FIFO-AC : b[26:24] => AC-FIFO id
236 * h-slot : b[23:8] => hanger-slot
237 * freerun : b[7:0] => A free running counter
238 */
239#define BRCMF_SKB_HTOD_TAG_GENERATION_MASK 0x80000000
240#define BRCMF_SKB_HTOD_TAG_GENERATION_SHIFT 31
241#define BRCMF_SKB_HTOD_TAG_FLAGS_MASK 0x78000000
242#define BRCMF_SKB_HTOD_TAG_FLAGS_SHIFT 27
243#define BRCMF_SKB_HTOD_TAG_FIFO_MASK 0x07000000
244#define BRCMF_SKB_HTOD_TAG_FIFO_SHIFT 24
245#define BRCMF_SKB_HTOD_TAG_HSLOT_MASK 0x00ffff00
246#define BRCMF_SKB_HTOD_TAG_HSLOT_SHIFT 8
247#define BRCMF_SKB_HTOD_TAG_FREERUN_MASK 0x000000ff
248#define BRCMF_SKB_HTOD_TAG_FREERUN_SHIFT 0
249
250#define brcmf_skb_htod_tag_set_field(skb, field, value) \
e2432b67 251 brcmu_maskset32(&(brcmf_skbcb(skb)->htod), \
ebb93883
AS		 252 BRCMF_SKB_HTOD_TAG_ ## field ## _MASK, \
253 BRCMF_SKB_HTOD_TAG_ ## field ## _SHIFT, (value))
254#define brcmf_skb_htod_tag_get_field(skb, field) \
e2432b67 255 brcmu_maskget32(brcmf_skbcb(skb)->htod, \
ebb93883
AS		 256 BRCMF_SKB_HTOD_TAG_ ## field ## _MASK, \
257 BRCMF_SKB_HTOD_TAG_ ## field ## _SHIFT)
258
3edc1cff
AS		 259#define BRCMF_FWS_TXSTAT_GENERATION_MASK 0x80000000
260#define BRCMF_FWS_TXSTAT_GENERATION_SHIFT 31
261#define BRCMF_FWS_TXSTAT_FLAGS_MASK 0x78000000
262#define BRCMF_FWS_TXSTAT_FLAGS_SHIFT 27
263#define BRCMF_FWS_TXSTAT_FIFO_MASK 0x07000000
264#define BRCMF_FWS_TXSTAT_FIFO_SHIFT 24
265#define BRCMF_FWS_TXSTAT_HSLOT_MASK 0x00FFFF00
266#define BRCMF_FWS_TXSTAT_HSLOT_SHIFT 8
267#define BRCMF_FWS_TXSTAT_PKTID_MASK 0x00FFFFFF
268#define BRCMF_FWS_TXSTAT_PKTID_SHIFT 0
269
270#define brcmf_txstatus_get_field(txs, field) \
271 brcmu_maskget32(txs, BRCMF_FWS_TXSTAT_ ## field ## _MASK, \
272 BRCMF_FWS_TXSTAT_ ## field ## _SHIFT)
273
274/**
275 * enum brcmf_fws_fifo - fifo indices used by dongle firmware.
276 *
277 * @BRCMF_FWS_FIFO_AC_BK: fifo for background traffic.
278 * @BRCMF_FWS_FIFO_AC_BE: fifo for best-effort traffic.
279 * @BRCMF_FWS_FIFO_AC_VI: fifo for video traffic.
280 * @BRCMF_FWS_FIFO_AC_VO: fifo for voice traffic.
281 * @BRCMF_FWS_FIFO_BCMC: fifo for broadcast/multicast (AP only).
282 * @BRCMF_FWS_FIFO_ATIM: fifo for ATIM (AP only).
283 * @BRCMF_FWS_FIFO_COUNT: number of fifos.
284 */
285enum brcmf_fws_fifo {
286 BRCMF_FWS_FIFO_AC_BK,
287 BRCMF_FWS_FIFO_AC_BE,
288 BRCMF_FWS_FIFO_AC_VI,
289 BRCMF_FWS_FIFO_AC_VO,
290 BRCMF_FWS_FIFO_BCMC,
291 BRCMF_FWS_FIFO_ATIM,
292 BRCMF_FWS_FIFO_COUNT
293};
294
295/**
296 * enum brcmf_fws_txstatus - txstatus flag values.
297 *
298 * @BRCMF_FWS_TXSTATUS_DISCARD:
299 * host is free to discard the packet.
300 * @BRCMF_FWS_TXSTATUS_CORE_SUPPRESS:
301 * 802.11 core suppressed the packet.
302 * @BRCMF_FWS_TXSTATUS_FW_PS_SUPPRESS:
303 * firmware suppress the packet as device is already in PS mode.
304 * @BRCMF_FWS_TXSTATUS_FW_TOSSED:
305 * firmware tossed the packet.
306 */
307enum brcmf_fws_txstatus {
308 BRCMF_FWS_TXSTATUS_DISCARD,
309 BRCMF_FWS_TXSTATUS_CORE_SUPPRESS,
310 BRCMF_FWS_TXSTATUS_FW_PS_SUPPRESS,
311 BRCMF_FWS_TXSTATUS_FW_TOSSED
312};
313
c7f34a69
AS		 314enum brcmf_fws_fcmode {
315 BRCMF_FWS_FCMODE_NONE,
316 BRCMF_FWS_FCMODE_IMPLIED_CREDIT,
317 BRCMF_FWS_FCMODE_EXPLICIT_CREDIT
318};
319
84bcc0c3
AS		 320enum brcmf_fws_mac_desc_state {
321 BRCMF_FWS_STATE_OPEN = 1,
322 BRCMF_FWS_STATE_CLOSE
323};
324
bb8c8063
AS		 325/**
326 * struct brcmf_fws_mac_descriptor - firmware signalling data per node/interface
327 *
328 * @occupied: slot is in use.
ce814c1b 329 * @mac_handle: handle for mac entry determined by firmware.
bb8c8063
AS		 330 * @interface_id: interface index.
331 * @state: current state.
3edc1cff
AS		 332 * @suppressed: mac entry is suppressed.
333 * @generation: generation bit.
bb8c8063
AS		 334 * @ac_bitmap: ac queue bitmap.
335 * @requested_credit: credits requested by firmware.
336 * @ea: ethernet address.
3edc1cff 337 * @seq: per-node free-running sequence.
bb8c8063 338 * @psq: power-save queue.
3edc1cff 339 * @transit_count: packet in transit to firmware.
bb8c8063
AS		 340 */
341struct brcmf_fws_mac_descriptor {
342 u8 occupied;
ce814c1b 343 u8 mac_handle;
bb8c8063
AS		 344 u8 interface_id;
345 u8 state;
3edc1cff
AS		 346 bool suppressed;
347 u8 generation;
bb8c8063
AS		 348 u8 ac_bitmap;
349 u8 requested_credit;
84bcc0c3 350 u8 requested_packet;
bb8c8063 351 u8 ea[ETH_ALEN];
3edc1cff 352 u8 seq[BRCMF_FWS_FIFO_COUNT];
bb8c8063 353 struct pktq psq;
3edc1cff 354 int transit_count;
84bcc0c3
AS		 355 int suppress_count;
356 int suppr_transit_count;
357 bool send_tim_signal;
358 u8 traffic_pending_bmp;
359 u8 traffic_lastreported_bmp;
bb8c8063
AS		 360};
361
6971280a
AS		 362#define BRCMF_FWS_HANGER_MAXITEMS 1024
363
364/**
365 * enum brcmf_fws_hanger_item_state - state of hanger item.
366 *
3edc1cff
AS		 367 * @BRCMF_FWS_HANGER_ITEM_STATE_FREE: item is free for use.
368 * @BRCMF_FWS_HANGER_ITEM_STATE_INUSE: item is in use.
369 * @BRCMF_FWS_HANGER_ITEM_STATE_INUSE_SUPPRESSED: item was suppressed.
6971280a
AS		 370 */
371enum brcmf_fws_hanger_item_state {
3edc1cff
AS		 372 BRCMF_FWS_HANGER_ITEM_STATE_FREE = 1,
373 BRCMF_FWS_HANGER_ITEM_STATE_INUSE,
374 BRCMF_FWS_HANGER_ITEM_STATE_INUSE_SUPPRESSED
6971280a
AS		 375};
376
377
378/**
379 * struct brcmf_fws_hanger_item - single entry for tx pending packet.
380 *
381 * @state: entry is either free or occupied.
382 * @gen: generation.
6971280a
AS		 383 * @pkt: packet itself.
384 */
385struct brcmf_fws_hanger_item {
386 enum brcmf_fws_hanger_item_state state;
387 u8 gen;
6971280a
AS		 388 struct sk_buff *pkt;
389};
390
391/**
392 * struct brcmf_fws_hanger - holds packets awaiting firmware txstatus.
393 *
6971280a
AS		 394 * @pushed: packets pushed to await txstatus.
395 * @popped: packets popped upon handling txstatus.
396 * @failed_to_push: packets that could not be pushed.
397 * @failed_to_pop: packets that could not be popped.
398 * @failed_slotfind: packets for which failed to find an entry.
399 * @slot_pos: last returned item index for a free entry.
400 * @items: array of hanger items.
401 */
402struct brcmf_fws_hanger {
403 u32 pushed;
404 u32 popped;
405 u32 failed_to_push;
406 u32 failed_to_pop;
407 u32 failed_slotfind;
408 u32 slot_pos;
409 struct brcmf_fws_hanger_item items[BRCMF_FWS_HANGER_MAXITEMS];
410};
411
84bcc0c3
AS		 412struct brcmf_fws_macdesc_table {
413 struct brcmf_fws_mac_descriptor nodes[BRCMF_FWS_MAC_DESC_TABLE_SIZE];
414 struct brcmf_fws_mac_descriptor iface[BRCMF_MAX_IFS];
415 struct brcmf_fws_mac_descriptor other;
416};
417
349e7104
AS		 418struct brcmf_fws_info {
419 struct brcmf_pub *drvr;
420 struct brcmf_fws_stats stats;
6971280a 421 struct brcmf_fws_hanger hanger;
c7f34a69 422 enum brcmf_fws_fcmode fcmode;
84bcc0c3
AS		 423 struct brcmf_fws_macdesc_table desc;
424 struct workqueue_struct *fws_wq;
425 struct work_struct fws_dequeue_work;
426 u32 fifo_enqpkt[BRCMF_FWS_FIFO_COUNT];
3edc1cff 427 int fifo_credit[BRCMF_FWS_FIFO_COUNT];
84bcc0c3
AS		 428 int deq_node_pos[BRCMF_FWS_FIFO_COUNT];
429 u32 fifo_credit_map;
430 u32 fifo_delay_map;
3edc1cff
AS		 431};
432
433/*
434 * brcmf_fws_prio2fifo - mapping from 802.1d priority to firmware fifo index.
435 */
436static const int brcmf_fws_prio2fifo[] = {
437 BRCMF_FWS_FIFO_AC_BE,
438 BRCMF_FWS_FIFO_AC_BK,
439 BRCMF_FWS_FIFO_AC_BK,
440 BRCMF_FWS_FIFO_AC_BE,
441 BRCMF_FWS_FIFO_AC_VI,
442 BRCMF_FWS_FIFO_AC_VI,
443 BRCMF_FWS_FIFO_AC_VO,
444 BRCMF_FWS_FIFO_AC_VO
349e7104
AS		 445};
446
c7f34a69
AS		 447static int fcmode;
448module_param(fcmode, int, S_IRUSR);
449MODULE_PARM_DESC(fcmode, "mode of firmware signalled flow control");
450
bb8c8063
AS		 451#define BRCMF_FWS_TLV_DEF(name, id, len) \
452 case BRCMF_FWS_TYPE_ ## name: \
453 return len;
454
3edc1cff
AS		 455/**
456 * brcmf_fws_get_tlv_len() - returns defined length for given tlv id.
457 *
458 * @fws: firmware-signalling information.
459 * @id: identifier of the TLV.
460 *
461 * Return: the specified length for the given TLV; Otherwise -EINVAL.
462 */
bb8c8063
AS		 463static int brcmf_fws_get_tlv_len(struct brcmf_fws_info *fws,
464 enum brcmf_fws_tlv_type id)
465{
466 switch (id) {
467 BRCMF_FWS_TLV_DEFLIST
468 default:
bb8c8063
AS		 469 fws->stats.tlv_invalid_type++;
470 break;
471 }
472 return -EINVAL;
473}
474#undef BRCMF_FWS_TLV_DEF
475
3edc1cff
AS		 476static bool brcmf_fws_ifidx_match(struct sk_buff *skb, void *arg)
477{
478 u32 ifidx = brcmf_skb_if_flags_get_field(skb, INDEX);
479 return ifidx == *(int *)arg;
480}
481
482static void brcmf_fws_psq_flush(struct brcmf_fws_info *fws, struct pktq *q,
483 int ifidx)
484{
485 bool (*matchfn)(struct sk_buff *, void *) = NULL;
486 struct sk_buff *skb;
487 int prec;
488
489 if (ifidx != -1)
490 matchfn = brcmf_fws_ifidx_match;
491 for (prec = 0; prec < q->num_prec; prec++) {
492 skb = brcmu_pktq_pdeq_match(q, prec, matchfn, &ifidx);
493 while (skb) {
84bcc0c3 494 brcmu_pkt_buf_free_skb(skb);
3edc1cff
AS		 495 skb = brcmu_pktq_pdeq_match(q, prec, matchfn, &ifidx);
496 }
497 }
498}
499
6971280a
AS		 500static void brcmf_fws_hanger_init(struct brcmf_fws_hanger *hanger)
501{
502 int i;
503
504 brcmf_dbg(TRACE, "enter\n");
505 memset(hanger, 0, sizeof(*hanger));
506 for (i = 0; i < ARRAY_SIZE(hanger->items); i++)
3edc1cff 507 hanger->items[i].state = BRCMF_FWS_HANGER_ITEM_STATE_FREE;
6971280a
AS		 508}
509
3edc1cff 510static u32 brcmf_fws_hanger_get_free_slot(struct brcmf_fws_hanger *h)
6971280a
AS		 511{
512 u32 i;
513
514 brcmf_dbg(TRACE, "enter\n");
515 i = (h->slot_pos + 1) % BRCMF_FWS_HANGER_MAXITEMS;
516
517 while (i != h->slot_pos) {
3edc1cff 518 if (h->items[i].state == BRCMF_FWS_HANGER_ITEM_STATE_FREE) {
6971280a 519 h->slot_pos = i;
84bcc0c3 520 goto done;
6971280a
AS		 521 }
522 i++;
523 if (i == BRCMF_FWS_HANGER_MAXITEMS)
524 i = 0;
525 }
526 brcmf_err("all slots occupied\n");
527 h->failed_slotfind++;
84bcc0c3
AS		 528 i = BRCMF_FWS_HANGER_MAXITEMS;
529done:
530 brcmf_dbg(TRACE, "exit: %d\n", i);
531 return i;
6971280a
AS		 532}
533
3edc1cff 534static int brcmf_fws_hanger_pushpkt(struct brcmf_fws_hanger *h,
6971280a
AS		 535 struct sk_buff *pkt, u32 slot_id)
536{
537 brcmf_dbg(TRACE, "enter\n");
538 if (slot_id >= BRCMF_FWS_HANGER_MAXITEMS)
539 return -ENOENT;
540
541 if (h->items[slot_id].state != BRCMF_FWS_HANGER_ITEM_STATE_FREE) {
542 brcmf_err("slot is not free\n");
543 h->failed_to_push++;
544 return -EINVAL;
545 }
546
547 h->items[slot_id].state = BRCMF_FWS_HANGER_ITEM_STATE_INUSE;
548 h->items[slot_id].pkt = pkt;
6971280a
AS		 549 h->pushed++;
550 return 0;
551}
552
3edc1cff 553static int brcmf_fws_hanger_poppkt(struct brcmf_fws_hanger *h,
6971280a
AS		 554 u32 slot_id, struct sk_buff **pktout,
555 bool remove_item)
556{
557 brcmf_dbg(TRACE, "enter\n");
558 if (slot_id >= BRCMF_FWS_HANGER_MAXITEMS)
559 return -ENOENT;
560
561 if (h->items[slot_id].state == BRCMF_FWS_HANGER_ITEM_STATE_FREE) {
562 brcmf_err("entry not in use\n");
563 h->failed_to_pop++;
564 return -EINVAL;
565 }
566
567 *pktout = h->items[slot_id].pkt;
568 if (remove_item) {
569 h->items[slot_id].state = BRCMF_FWS_HANGER_ITEM_STATE_FREE;
570 h->items[slot_id].pkt = NULL;
6971280a
AS		 571 h->items[slot_id].gen = 0xff;
572 h->popped++;
573 }
574 return 0;
575}
576
84bcc0c3 577static int brcmf_fws_hanger_mark_suppressed(struct brcmf_fws_hanger *h,
6971280a
AS		 578 u32 slot_id, u8 gen)
579{
580 brcmf_dbg(TRACE, "enter\n");
581
582 if (slot_id >= BRCMF_FWS_HANGER_MAXITEMS)
583 return -ENOENT;
584
585 h->items[slot_id].gen = gen;
586
3edc1cff 587 if (h->items[slot_id].state != BRCMF_FWS_HANGER_ITEM_STATE_INUSE) {
6971280a
AS		 588 brcmf_err("entry not in use\n");
589 return -EINVAL;
590 }
591
3edc1cff 592 h->items[slot_id].state = BRCMF_FWS_HANGER_ITEM_STATE_INUSE_SUPPRESSED;
6971280a
AS		 593 return 0;
594}
595
3edc1cff 596static int brcmf_fws_hanger_get_genbit(struct brcmf_fws_hanger *hanger,
6971280a
AS		 597 struct sk_buff *pkt, u32 slot_id,
598 int *gen)
599{
600 brcmf_dbg(TRACE, "enter\n");
601 *gen = 0xff;
602
603 if (slot_id >= BRCMF_FWS_HANGER_MAXITEMS)
604 return -ENOENT;
605
606 if (hanger->items[slot_id].state == BRCMF_FWS_HANGER_ITEM_STATE_FREE) {
607 brcmf_err("slot not in use\n");
608 return -EINVAL;
609 }
610
611 *gen = hanger->items[slot_id].gen;
612 return 0;
613}
614
84bcc0c3 615static void brcmf_fws_hanger_cleanup(struct brcmf_fws_info *fws,
6971280a
AS		 616 bool (*fn)(struct sk_buff *, void *),
617 int ifidx)
618{
84bcc0c3 619 struct brcmf_fws_hanger *h = &fws->hanger;
6971280a
AS		 620 struct sk_buff *skb;
621 int i;
622 enum brcmf_fws_hanger_item_state s;
623
624 brcmf_dbg(TRACE, "enter: ifidx=%d\n", ifidx);
625 for (i = 0; i < ARRAY_SIZE(h->items); i++) {
626 s = h->items[i].state;
627 if (s == BRCMF_FWS_HANGER_ITEM_STATE_INUSE ||
628 s == BRCMF_FWS_HANGER_ITEM_STATE_INUSE_SUPPRESSED) {
629 skb = h->items[i].pkt;
630 if (fn == NULL || fn(skb, &ifidx)) {
631 /* suppress packets freed from psq */
632 if (s == BRCMF_FWS_HANGER_ITEM_STATE_INUSE)
633 brcmu_pkt_buf_free_skb(skb);
634 h->items[i].state =
635 BRCMF_FWS_HANGER_ITEM_STATE_FREE;
636 }
637 }
638 }
639}
640
ce814c1b
AS		 641static void brcmf_fws_init_mac_descriptor(struct brcmf_fws_mac_descriptor *desc,
642 u8 *addr, u8 ifidx)
643{
84bcc0c3
AS		 644 brcmf_dbg(TRACE,
645 "enter: desc %p ea=%pM, ifidx=%u\n", desc, addr, ifidx);
ce814c1b
AS		 646 desc->occupied = 1;
647 desc->state = BRCMF_FWS_STATE_OPEN;
648 desc->requested_credit = 0;
649 /* depending on use may need ifp->bssidx instead */
650 desc->interface_id = ifidx;
651 desc->ac_bitmap = 0xff; /* update this when handling APSD */
84bcc0c3
AS		 652 if (addr)
653 memcpy(&desc->ea[0], addr, ETH_ALEN);
ce814c1b
AS		 654}
655
656static
657void brcmf_fws_clear_mac_descriptor(struct brcmf_fws_mac_descriptor *desc)
658{
659 brcmf_dbg(TRACE,
660 "enter: ea=%pM, ifidx=%u\n", desc->ea, desc->interface_id);
661 desc->occupied = 0;
662 desc->state = BRCMF_FWS_STATE_CLOSE;
663 desc->requested_credit = 0;
664}
665
666static struct brcmf_fws_mac_descriptor *
667brcmf_fws_mac_descriptor_lookup(struct brcmf_fws_info *fws, u8 *ea)
668{
669 struct brcmf_fws_mac_descriptor *entry;
670 int i;
671
672 brcmf_dbg(TRACE, "enter: ea=%pM\n", ea);
673 if (ea == NULL)
674 return ERR_PTR(-EINVAL);
675
84bcc0c3
AS		 676 entry = &fws->desc.nodes[0];
677 for (i = 0; i < ARRAY_SIZE(fws->desc.nodes); i++) {
ce814c1b
AS		 678 if (entry->occupied && !memcmp(entry->ea, ea, ETH_ALEN))
679 return entry;
680 entry++;
681 }
682
683 return ERR_PTR(-ENOENT);
684}
685
3edc1cff 686static struct brcmf_fws_mac_descriptor*
f97a7f06
AS		 687brcmf_fws_find_mac_desc(struct brcmf_fws_info *fws, struct brcmf_if *ifp,
688 u8 *da)
3edc1cff 689{
84bcc0c3 690 struct brcmf_fws_mac_descriptor *entry = &fws->desc.other;
3edc1cff 691 bool multicast;
a7965fbb 692 enum nl80211_iftype iftype;
3edc1cff 693
f97a7f06 694 brcmf_dbg(TRACE, "enter: idx=%d\n", ifp->bssidx);
3edc1cff 695
f97a7f06 696 multicast = is_multicast_ether_addr(da);
a7965fbb
AS		 697 iftype = brcmf_cfg80211_get_iftype(ifp);
698
3edc1cff
AS		 699 /* Multicast destination and P2P clients get the interface entry.
700 * STA gets the interface entry if there is no exact match. For
701 * example, TDLS destinations have their own entry.
702 */
703 entry = NULL;
a7965fbb
AS		 704 if ((multicast || iftype == NL80211_IFTYPE_STATION ||
705 iftype == NL80211_IFTYPE_P2P_CLIENT) && ifp->fws_desc)
3edc1cff
AS		 706 entry = ifp->fws_desc;
707
a7965fbb 708 if (entry != NULL && iftype != NL80211_IFTYPE_STATION)
3edc1cff
AS		 709 goto done;
710
711 entry = brcmf_fws_mac_descriptor_lookup(fws, da);
712 if (IS_ERR(entry))
84bcc0c3 713 entry = &fws->desc.other;
3edc1cff
AS		 714
715done:
716 brcmf_dbg(TRACE, "exit: entry=%p\n", entry);
717 return entry;
718}
719
b75c1a30
AS		 720static bool brcmf_fws_mac_desc_closed(struct brcmf_fws_info *fws,
721 struct brcmf_fws_mac_descriptor *entry,
9fc60224 722 int fifo)
84bcc0c3 723{
b75c1a30 724 struct brcmf_fws_mac_descriptor *if_entry;
9fc60224 725 bool closed;
84bcc0c3 726
b75c1a30
AS		 727 /* for unique destination entries the related interface
728 * may be closed.
729 */
730 if (entry->mac_handle) {
731 if_entry = &fws->desc.iface[entry->interface_id];
732 if (if_entry->state == BRCMF_FWS_STATE_CLOSE)
733 return true;
734 }
9fc60224
AS		 735 /* an entry is closed when the state is closed and
736 * the firmware did not request anything.
84bcc0c3 737 */
9fc60224
AS		 738 closed = entry->state == BRCMF_FWS_STATE_CLOSE &&
739 !entry->requested_credit && !entry->requested_packet;
84bcc0c3 740
9fc60224
AS		 741 /* Or firmware does not allow traffic for given fifo */
742 return closed || !(entry->ac_bitmap & BIT(fifo));
84bcc0c3
AS		 743}
744
3edc1cff
AS		 745static void brcmf_fws_mac_desc_cleanup(struct brcmf_fws_info *fws,
746 struct brcmf_fws_mac_descriptor *entry,
fba1400a
AS		 747 int ifidx)
748{
3edc1cff 749 brcmf_dbg(TRACE, "enter: entry=(ea=%pM, ifid=%d), ifidx=%d\n",
fba1400a 750 entry->ea, entry->interface_id, ifidx);
3edc1cff
AS		 751 if (entry->occupied && (ifidx == -1 || ifidx == entry->interface_id)) {
752 brcmf_dbg(TRACE, "flush psq: ifidx=%d, qlen=%d\n",
fba1400a 753 ifidx, entry->psq.len);
3edc1cff 754 brcmf_fws_psq_flush(fws, &entry->psq, ifidx);
fba1400a
AS		 755 entry->occupied = !!(entry->psq.len);
756 }
757}
758
e2432b67
AS		 759static void brcmf_fws_bus_txq_cleanup(struct brcmf_fws_info *fws,
760 bool (*fn)(struct sk_buff *, void *),
761 int ifidx)
762{
763 struct brcmf_fws_hanger_item *hi;
764 struct pktq *txq;
765 struct sk_buff *skb;
766 int prec;
767 u32 hslot;
768
769 brcmf_dbg(TRACE, "enter: ifidx=%d\n", ifidx);
770 txq = brcmf_bus_gettxq(fws->drvr->bus_if);
771 if (IS_ERR(txq)) {
772 brcmf_dbg(TRACE, "no txq to clean up\n");
773 return;
774 }
775
776 for (prec = 0; prec < txq->num_prec; prec++) {
777 skb = brcmu_pktq_pdeq_match(txq, prec, fn, &ifidx);
778 while (skb) {
779 hslot = brcmf_skb_htod_tag_get_field(skb, HSLOT);
780 hi = &fws->hanger.items[hslot];
781 WARN_ON(skb != hi->pkt);
782 hi->state = BRCMF_FWS_HANGER_ITEM_STATE_FREE;
783 brcmu_pkt_buf_free_skb(skb);
784 skb = brcmu_pktq_pdeq_match(txq, prec, fn, &ifidx);
785 }
786 }
787}
788
fba1400a
AS		 789static void brcmf_fws_cleanup(struct brcmf_fws_info *fws, int ifidx)
790{
791 int i;
792 struct brcmf_fws_mac_descriptor *table;
a3e993c7 793 bool (*matchfn)(struct sk_buff *, void *) = NULL;
fba1400a
AS		 794
795 brcmf_dbg(TRACE, "enter: ifidx=%d\n", ifidx);
796 if (fws == NULL)
797 return;
798
a3e993c7
AS		 799 if (ifidx != -1)
800 matchfn = brcmf_fws_ifidx_match;
801
fba1400a 802 /* cleanup individual nodes */
84bcc0c3
AS		 803 table = &fws->desc.nodes[0];
804 for (i = 0; i < ARRAY_SIZE(fws->desc.nodes); i++)
3edc1cff 805 brcmf_fws_mac_desc_cleanup(fws, &table[i], ifidx);
fba1400a 806
84bcc0c3 807 brcmf_fws_mac_desc_cleanup(fws, &fws->desc.other, ifidx);
e2432b67 808 brcmf_fws_bus_txq_cleanup(fws, matchfn, ifidx);
84bcc0c3
AS		 809 brcmf_fws_hanger_cleanup(fws, matchfn, ifidx);
810}
811
812static void brcmf_fws_tim_update(struct brcmf_fws_info *ctx,
813 struct brcmf_fws_mac_descriptor *entry,
814 int prec)
815{
816 brcmf_dbg(TRACE, "enter: ea=%pM\n", entry->ea);
817 if (entry->state == BRCMF_FWS_STATE_CLOSE) {
818 /* check delayedQ and suppressQ in one call using bitmap */
819 if (brcmu_pktq_mlen(&entry->psq, 3 << (prec * 2)) == 0)
820 entry->traffic_pending_bmp =
821 entry->traffic_pending_bmp & ~NBITVAL(prec);
822 else
823 entry->traffic_pending_bmp =
824 entry->traffic_pending_bmp | NBITVAL(prec);
825 }
826 /* request a TIM update to firmware at the next piggyback opportunity */
827 if (entry->traffic_lastreported_bmp != entry->traffic_pending_bmp)
828 entry->send_tim_signal = true;
829}
830
831static void
832brcmf_fws_flow_control_check(struct brcmf_fws_info *fws, struct pktq *pq,
833 u8 if_id)
834{
835 struct brcmf_if *ifp = fws->drvr->iflist[if_id];
836
837 brcmf_dbg(TRACE,
838 "enter: bssidx=%d, ifidx=%d\n", ifp->bssidx, ifp->ifidx);
839 if (WARN_ON(!ifp))
840 return;
841
842 if ((ifp->netif_stop & BRCMF_NETIF_STOP_REASON_FWS_FC) &&
843 pq->len <= BRCMF_FWS_FLOWCONTROL_LOWATER)
844 brcmf_txflowblock_if(ifp,
845 BRCMF_NETIF_STOP_REASON_FWS_FC, false);
846 if (!(ifp->netif_stop & BRCMF_NETIF_STOP_REASON_FWS_FC) &&
847 pq->len >= BRCMF_FWS_FLOWCONTROL_HIWATER)
848 brcmf_txflowblock_if(ifp, BRCMF_NETIF_STOP_REASON_FWS_FC, true);
849 return;
fba1400a
AS		 850}
851
349e7104
AS		 852static int brcmf_fws_rssi_indicate(struct brcmf_fws_info *fws, s8 rssi)
853{
854 brcmf_dbg(CTL, "rssi %d\n", rssi);
855 return 0;
856}
857
ce814c1b
AS		 858static
859int brcmf_fws_macdesc_indicate(struct brcmf_fws_info *fws, u8 type, u8 *data)
860{
861 struct brcmf_fws_mac_descriptor *entry, *existing;
862 u8 mac_handle;
863 u8 ifidx;
864 u8 *addr;
865
866 mac_handle = *data++;
867 ifidx = *data++;
868 addr = data;
869
84bcc0c3 870 entry = &fws->desc.nodes[mac_handle & 0x1F];
ce814c1b
AS		 871 if (type == BRCMF_FWS_TYPE_MACDESC_DEL) {
872 brcmf_dbg(TRACE, "deleting mac %pM idx %d\n", addr, ifidx);
3edc1cff
AS		 873 if (entry->occupied)
874 brcmf_fws_clear_mac_descriptor(entry);
875 else
ce814c1b 876 fws->stats.mac_update_failed++;
ce814c1b
AS		 877 return 0;
878 }
879
3edc1cff
AS		 880 brcmf_dbg(TRACE,
881 "add mac %pM handle %u idx %d\n", addr, mac_handle, ifidx);
ce814c1b
AS		 882 existing = brcmf_fws_mac_descriptor_lookup(fws, addr);
883 if (IS_ERR(existing)) {
884 if (!entry->occupied) {
885 entry->mac_handle = mac_handle;
886 brcmf_fws_init_mac_descriptor(entry, addr, ifidx);
887 brcmu_pktq_init(&entry->psq, BRCMF_FWS_PSQ_PREC_COUNT,
888 BRCMF_FWS_PSQ_LEN);
889 } else {
890 fws->stats.mac_update_failed++;
891 }
892 } else {
893 if (entry != existing) {
894 brcmf_dbg(TRACE, "relocate mac\n");
895 memcpy(entry, existing,
896 offsetof(struct brcmf_fws_mac_descriptor, psq));
897 entry->mac_handle = mac_handle;
898 brcmf_fws_clear_mac_descriptor(existing);
899 } else {
900 brcmf_dbg(TRACE, "use existing\n");
901 WARN_ON(entry->mac_handle != mac_handle);
902 /* TODO: what should we do here: continue, reinit, .. */
903 }
904 }
905 return 0;
906}
907
33753d47
AS		 908static int brcmf_fws_macdesc_state_indicate(struct brcmf_fws_info *fws,
909 u8 type, u8 *data)
910{
911 struct brcmf_fws_mac_descriptor *entry;
912 u8 mac_handle;
913 int i;
914
915 mac_handle = data[0];
916 entry = &fws->desc.nodes[mac_handle & 0x1F];
917 if (!entry->occupied) {
918 fws->stats.mac_ps_update_failed++;
919 return -ESRCH;
920 }
921
922 /* a state update should wipe old credits? */
923 entry->requested_credit = 0;
924 if (type == BRCMF_FWS_TYPE_MAC_OPEN) {
925 entry->state = BRCMF_FWS_STATE_OPEN;
a5e9d805 926 return BRCMF_FWS_RET_OK_SCHEDULE;
33753d47
AS		 927 } else {
928 entry->state = BRCMF_FWS_STATE_CLOSE;
929 for (i = BRCMF_FWS_FIFO_AC_BE; i < NL80211_NUM_ACS; i++)
930 brcmf_fws_tim_update(fws, entry, i);
931 }
a5e9d805 932 return BRCMF_FWS_RET_OK_NOSCHEDULE;
33753d47
AS		 933}
934
935static int brcmf_fws_interface_state_indicate(struct brcmf_fws_info *fws,
936 u8 type, u8 *data)
937{
938 struct brcmf_fws_mac_descriptor *entry;
939 u8 ifidx;
940 int ret;
941
942 ifidx = data[0];
943
944 brcmf_dbg(TRACE, "enter: ifidx=%d\n", ifidx);
945 if (ifidx >= BRCMF_MAX_IFS) {
946 ret = -ERANGE;
947 goto fail;
948 }
949
950 entry = &fws->desc.iface[ifidx];
951 if (!entry->occupied) {
952 ret = -ESRCH;
953 goto fail;
954 }
955
956 switch (type) {
957 case BRCMF_FWS_TYPE_INTERFACE_OPEN:
958 entry->state = BRCMF_FWS_STATE_OPEN;
a5e9d805 959 return BRCMF_FWS_RET_OK_SCHEDULE;
33753d47
AS		 960 case BRCMF_FWS_TYPE_INTERFACE_CLOSE:
961 entry->state = BRCMF_FWS_STATE_CLOSE;
a5e9d805 962 return BRCMF_FWS_RET_OK_NOSCHEDULE;
33753d47
AS		 963 default:
964 ret = -EINVAL;
965 break;
966 }
967fail:
968 fws->stats.if_update_failed++;
969 return ret;
970}
971
5f38b683
AS		 972static int brcmf_fws_request_indicate(struct brcmf_fws_info *fws, u8 type,
973 u8 *data)
974{
975 struct brcmf_fws_mac_descriptor *entry;
976
977 entry = &fws->desc.nodes[data[1] & 0x1F];
978 if (!entry->occupied) {
979 if (type == BRCMF_FWS_TYPE_MAC_REQUEST_CREDIT)
980 fws->stats.credit_request_failed++;
981 else
982 fws->stats.packet_request_failed++;
983 return -ESRCH;
984 }
985
986 if (type == BRCMF_FWS_TYPE_MAC_REQUEST_CREDIT)
987 entry->requested_credit = data[0];
988 else
989 entry->requested_packet = data[0];
990
991 entry->ac_bitmap = data[2];
a5e9d805 992 return BRCMF_FWS_RET_OK_SCHEDULE;
5f38b683
AS		 993}
994
84bcc0c3
AS		 995static void brcmf_fws_return_credits(struct brcmf_fws_info *fws,
996 u8 fifo, u8 credits)
997{
998 if (!credits)
999 return;
1000
1001 fws->fifo_credit_map |= 1 << fifo;
1002 fws->fifo_credit[fifo] += credits;
1003}
1004
1005static void brcmf_fws_schedule_deq(struct brcmf_fws_info *fws)
1006{
1007 /* only schedule dequeue when there are credits for delayed traffic */
1008 if (fws->fifo_credit_map & fws->fifo_delay_map)
1009 queue_work(fws->fws_wq, &fws->fws_dequeue_work);
1010}
1011
1012static void brcmf_skb_pick_up_credit(struct brcmf_fws_info *fws, int fifo,
1013 struct sk_buff *p)
1014{
1015 struct brcmf_fws_mac_descriptor *entry = brcmf_skbcb(p)->mac;
1016
1017 if (brcmf_skbcb(p)->if_flags & BRCMF_SKB_IF_FLAGS_CREDITCHECK_MASK) {
1018 if (fws->fcmode != BRCMF_FWS_FCMODE_IMPLIED_CREDIT)
1019 return;
1020 brcmf_fws_return_credits(fws, fifo, 1);
1021 } else {
1022 /*
1023 * if this packet did not count against FIFO credit, it
1024 * must have taken a requested_credit from the destination
1025 * entry (for pspoll etc.)
1026 */
1027 if (!brcmf_skb_if_flags_get_field(p, REQUESTED))
1028 entry->requested_credit++;
1029 }
1030 brcmf_fws_schedule_deq(fws);
1031}
1032
1033static int brcmf_fws_enq(struct brcmf_fws_info *fws,
1034 enum brcmf_fws_skb_state state, int fifo,
1035 struct sk_buff *p)
1036{
1037 int prec = 2 * fifo;
1038 u32 *qfull_stat = &fws->stats.delayq_full_error;
1039
1040 struct brcmf_fws_mac_descriptor *entry;
1041
1042 entry = brcmf_skbcb(p)->mac;
1043 if (entry == NULL) {
1044 brcmf_err("no mac descriptor found for skb %p\n", p);
1045 return -ENOENT;
1046 }
1047
1048 brcmf_dbg(TRACE, "enter: ea=%pM, qlen=%d\n", entry->ea, entry->psq.len);
1049 if (state == BRCMF_FWS_SKBSTATE_SUPPRESSED) {
1050 prec += 1;
1051 qfull_stat = &fws->stats.supprq_full_error;
1052 }
1053
1054 if (brcmu_pktq_penq(&entry->psq, prec, p) == NULL) {
1055 *qfull_stat += 1;
1056 return -ENFILE;
1057 }
1058
1059 /* increment total enqueued packet count */
1060 fws->fifo_delay_map |= 1 << fifo;
1061 fws->fifo_enqpkt[fifo]++;
1062
1063 /* update the sk_buff state */
1064 brcmf_skbcb(p)->state = state;
1065 if (state == BRCMF_FWS_SKBSTATE_SUPPRESSED)
1066 entry->suppress_count++;
1067
1068 /*
1069 * A packet has been pushed so update traffic
1070 * availability bitmap, if applicable
1071 */
1072 brcmf_fws_tim_update(fws, entry, fifo);
1073 brcmf_fws_flow_control_check(fws, &entry->psq,
1074 brcmf_skb_if_flags_get_field(p, INDEX));
1075 return 0;
1076}
1077
1078static struct sk_buff *brcmf_fws_deq(struct brcmf_fws_info *fws, int fifo)
1079{
1080 struct brcmf_fws_mac_descriptor *table;
1081 struct brcmf_fws_mac_descriptor *entry;
1082 struct sk_buff *p;
1083 int use_credit = 1;
1084 int num_nodes;
1085 int node_pos;
1086 int prec_out;
07529d20 1087 int pmsk;
84bcc0c3
AS		 1088 int i;
1089
1090 table = (struct brcmf_fws_mac_descriptor *)&fws->desc;
1091 num_nodes = sizeof(fws->desc) / sizeof(struct brcmf_fws_mac_descriptor);
1092 node_pos = fws->deq_node_pos[fifo];
1093
1094 for (i = 0; i < num_nodes; i++) {
1095 entry = &table[(node_pos + i) % num_nodes];
b75c1a30
AS		 1096 if (!entry->occupied ||
1097 brcmf_fws_mac_desc_closed(fws, entry, fifo))
84bcc0c3
AS		 1098 continue;
1099
1100 if (entry->suppressed)
1101 pmsk = 2;
07529d20
AS		 1102 else
1103 pmsk = 3;
84bcc0c3
AS		 1104 p = brcmu_pktq_mdeq(&entry->psq, pmsk << (fifo * 2), &prec_out);
1105 if (p == NULL) {
1106 if (entry->suppressed) {
1107 if (entry->suppr_transit_count >
1108 entry->suppress_count)
1109 return NULL;
1110 entry->suppressed = false;
1111 p = brcmu_pktq_mdeq(&entry->psq,
1112 1 << (fifo * 2), &prec_out);
1113 }
1114 }
1115 if (p == NULL)
1116 continue;
1117
1118 /* did the packet come from suppress sub-queue? */
1119 if (entry->requested_credit > 0) {
1120 entry->requested_credit--;
1121 /*
1122 * if the packet was pulled out while destination is in
1123 * closed state but had a non-zero packets requested,
1124 * then this should not count against the FIFO credit.
1125 * That is due to the fact that the firmware will
1126 * most likely hold onto this packet until a suitable
1127 * time later to push it to the appropriate AC FIFO.
1128 */
1129 if (entry->state == BRCMF_FWS_STATE_CLOSE)
1130 use_credit = 0;
1131 } else if (entry->requested_packet > 0) {
1132 entry->requested_packet--;
1133 brcmf_skb_if_flags_set_field(p, REQUESTED, 1);
1134 if (entry->state == BRCMF_FWS_STATE_CLOSE)
1135 use_credit = 0;
1136 }
1137 brcmf_skb_if_flags_set_field(p, CREDITCHECK, use_credit);
1138
1139 /* move dequeue position to ensure fair round-robin */
1140 fws->deq_node_pos[fifo] = (node_pos + i + 1) % num_nodes;
1141 brcmf_fws_flow_control_check(fws, &entry->psq,
1142 brcmf_skb_if_flags_get_field(p,
1143 INDEX)
1144 );
1145 /*
1146 * A packet has been picked up, update traffic
1147 * availability bitmap, if applicable
1148 */
1149 brcmf_fws_tim_update(fws, entry, fifo);
1150
1151 /*
1152 * decrement total enqueued fifo packets and
1153 * clear delay bitmap if done.
1154 */
1155 fws->fifo_enqpkt[fifo]--;
1156 if (fws->fifo_enqpkt[fifo] == 0)
1157 fws->fifo_delay_map &= ~(1 << fifo);
1158 goto done;
1159 }
1160 p = NULL;
1161done:
1162 brcmf_dbg(TRACE, "exit: fifo %d skb %p\n", fifo, p);
1163 return p;
1164}
1165
1166static int brcmf_fws_txstatus_suppressed(struct brcmf_fws_info *fws, int fifo,
1167 struct sk_buff *skb, u32 genbit)
1168{
1169 struct brcmf_fws_mac_descriptor *entry = brcmf_skbcb(skb)->mac;
1170 u32 hslot;
1171 int ret;
1172
1173 hslot = brcmf_skb_htod_tag_get_field(skb, HSLOT);
1174
1175 /* this packet was suppressed */
1176 if (!entry->suppressed || entry->generation != genbit) {
1177 entry->suppressed = true;
1178 entry->suppress_count = brcmu_pktq_mlen(&entry->psq,
1179 1 << (fifo * 2 + 1));
1180 entry->suppr_transit_count = entry->transit_count;
1181 }
1182
1183 entry->generation = genbit;
1184
1185 ret = brcmf_fws_enq(fws, BRCMF_FWS_SKBSTATE_SUPPRESSED, fifo, skb);
1186 if (ret != 0) {
1187 /* suppress q is full, drop this packet */
1188 brcmf_fws_hanger_poppkt(&fws->hanger, hslot, &skb,
1189 true);
1190 } else {
1191 /*
1192 * Mark suppressed to avoid a double free during
1193 * wlfc cleanup
1194 */
1195 brcmf_fws_hanger_mark_suppressed(&fws->hanger, hslot,
1196 genbit);
1197 entry->suppress_count++;
1198 }
1199
1200 return ret;
1201}
1202
3edc1cff 1203static int
84bcc0c3
AS		 1204brcmf_fws_txstatus_process(struct brcmf_fws_info *fws, u8 flags, u32 hslot,
1205 u32 genbit)
3edc1cff 1206{
84bcc0c3 1207 u32 fifo;
3edc1cff 1208 int ret;
84bcc0c3 1209 bool remove_from_hanger = true;
3edc1cff
AS		 1210 struct sk_buff *skb;
1211 struct brcmf_fws_mac_descriptor *entry = NULL;
1212
3edc1cff
AS		 1213 brcmf_dbg(TRACE, "status: flags=0x%X, hslot=%d\n",
1214 flags, hslot);
1215
1216 if (flags == BRCMF_FWS_TXSTATUS_DISCARD)
1217 fws->stats.txs_discard++;
84bcc0c3
AS		 1218 else if (flags == BRCMF_FWS_TXSTATUS_CORE_SUPPRESS) {
1219 fws->stats.txs_supp_core++;
1220 remove_from_hanger = false;
1221 } else if (flags == BRCMF_FWS_TXSTATUS_FW_PS_SUPPRESS) {
1222 fws->stats.txs_supp_ps++;
1223 remove_from_hanger = false;
1224 } else if (flags == BRCMF_FWS_TXSTATUS_FW_TOSSED)
3edc1cff
AS		 1225 fws->stats.txs_tossed++;
1226 else
1227 brcmf_err("unexpected txstatus\n");
1228
1229 ret = brcmf_fws_hanger_poppkt(&fws->hanger, hslot, &skb,
84bcc0c3 1230 remove_from_hanger);
3edc1cff
AS		 1231 if (ret != 0) {
1232 brcmf_err("no packet in hanger slot: hslot=%d\n", hslot);
1233 return ret;
1234 }
1235
1236 entry = brcmf_skbcb(skb)->mac;
1237 if (WARN_ON(!entry)) {
84bcc0c3
AS		 1238 brcmu_pkt_buf_free_skb(skb);
1239 return -EINVAL;
3edc1cff
AS		 1240 }
1241
84bcc0c3
AS		 1242 /* pick up the implicit credit from this packet */
1243 fifo = brcmf_skb_htod_tag_get_field(skb, FIFO);
1244 brcmf_skb_pick_up_credit(fws, fifo, skb);
3edc1cff 1245
84bcc0c3
AS		 1246 if (!remove_from_hanger)
1247 ret = brcmf_fws_txstatus_suppressed(fws, fifo, skb, genbit);
1248
1249 if (remove_from_hanger || ret) {
1250 entry->transit_count--;
1251 if (entry->suppressed)
1252 entry->suppr_transit_count--;
1253
1254 brcmf_txfinalize(fws->drvr, skb, true);
1255 }
1256 return 0;
1257}
1258
1259static int brcmf_fws_fifocreditback_indicate(struct brcmf_fws_info *fws,
1260 u8 *data)
1261{
1262 int i;
1263
1264 if (fws->fcmode != BRCMF_FWS_FCMODE_EXPLICIT_CREDIT) {
1265 brcmf_dbg(INFO, "ignored\n");
a5e9d805 1266 return BRCMF_FWS_RET_OK_NOSCHEDULE;
84bcc0c3
AS		 1267 }
1268
1269 brcmf_dbg(TRACE, "enter: data %pM\n", data);
1270 for (i = 0; i < BRCMF_FWS_FIFO_COUNT; i++)
1271 brcmf_fws_return_credits(fws, i, data[i]);
1272
1273 brcmf_dbg(INFO, "map: credit %x delay %x\n", fws->fifo_credit_map,
1274 fws->fifo_delay_map);
a5e9d805 1275 return BRCMF_FWS_RET_OK_SCHEDULE;
3edc1cff
AS		 1276}
1277
0f8b5cc5
AS		 1278static int brcmf_fws_txstatus_indicate(struct brcmf_fws_info *fws, u8 *data)
1279{
a2ffc566 1280 __le32 status_le;
0f8b5cc5
AS		 1281 u32 status;
1282 u32 hslot;
84bcc0c3 1283 u32 genbit;
0f8b5cc5
AS		 1284 u8 flags;
1285
1286 fws->stats.txs_indicate++;
a2ffc566
AS		 1287 memcpy(&status_le, data, sizeof(status_le));
1288 status = le32_to_cpu(status_le);
0f8b5cc5
AS		 1289 flags = brcmf_txstatus_get_field(status, FLAGS);
1290 hslot = brcmf_txstatus_get_field(status, HSLOT);
84bcc0c3 1291 genbit = brcmf_txstatus_get_field(status, GENERATION);
0f8b5cc5 1292
84bcc0c3 1293 return brcmf_fws_txstatus_process(fws, flags, hslot, genbit);
0f8b5cc5
AS		 1294}
1295
349e7104
AS		 1296static int brcmf_fws_dbg_seqnum_check(struct brcmf_fws_info *fws, u8 *data)
1297{
1298 __le32 timestamp;
1299
1300 memcpy(&timestamp, &data[2], sizeof(timestamp));
1301 brcmf_dbg(INFO, "received: seq %d, timestamp %d\n", data[1],
1302 le32_to_cpu(timestamp));
1303 return 0;
1304}
1305
1306/* using macro so sparse checking does not complain
1307 * about locking imbalance.
1308 */
1309#define brcmf_fws_lock(drvr, flags) \
1310do { \
1311 flags = 0; \
1312 spin_lock_irqsave(&((drvr)->fws_spinlock), (flags)); \
1313} while (0)
1314
1315/* using macro so sparse checking does not complain
1316 * about locking imbalance.
1317 */
1318#define brcmf_fws_unlock(drvr, flags) \
1319 spin_unlock_irqrestore(&((drvr)->fws_spinlock), (flags))
1320
43fa635e
AS		 1321static int brcmf_fws_notify_credit_map(struct brcmf_if *ifp,
1322 const struct brcmf_event_msg *e,
1323 void *data)
1324{
1325 struct brcmf_fws_info *fws = ifp->drvr->fws;
1326 int i;
1327 ulong flags;
1328 u8 *credits = data;
1329
84bcc0c3
AS		 1330 if (e->datalen < BRCMF_FWS_FIFO_COUNT) {
1331 brcmf_err("event payload too small (%d)\n", e->datalen);
1332 return -EINVAL;
1333 }
1334
1335 brcmf_dbg(TRACE, "enter: credits %pM\n", credits);
43fa635e 1336 brcmf_fws_lock(ifp->drvr, flags);
84bcc0c3
AS		 1337 for (i = 0; i < ARRAY_SIZE(fws->fifo_credit); i++) {
1338 if (*credits)
1339 fws->fifo_credit_map |= 1 << i;
1340 else
1341 fws->fifo_credit_map &= ~(1 << i);
43fa635e 1342 fws->fifo_credit[i] = *credits++;
84bcc0c3
AS		 1343 }
1344 brcmf_fws_schedule_deq(fws);
43fa635e
AS		 1345 brcmf_fws_unlock(ifp->drvr, flags);
1346 return 0;
1347}
1348
349e7104
AS		 1349int brcmf_fws_hdrpull(struct brcmf_pub *drvr, int ifidx, s16 signal_len,
1350 struct sk_buff *skb)
1351{
1352 struct brcmf_fws_info *fws = drvr->fws;
1353 ulong flags;
1354 u8 *signal_data;
1355 s16 data_len;
1356 u8 type;
1357 u8 len;
1358 u8 *data;
a5e9d805
AS		 1359 s32 status;
1360 s32 err;
349e7104
AS		 1361
1362 brcmf_dbg(TRACE, "enter: ifidx %d, skblen %u, sig %d\n",
1363 ifidx, skb->len, signal_len);
1364
1365 WARN_ON(signal_len > skb->len);
1366
1367 /* if flow control disabled, skip to packet data and leave */
1368 if (!signal_len || !drvr->fw_signals) {
1369 skb_pull(skb, signal_len);
1370 return 0;
1371 }
1372
1373 /* lock during tlv parsing */
1374 brcmf_fws_lock(drvr, flags);
1375
1376 fws->stats.header_pulls++;
1377 data_len = signal_len;
1378 signal_data = skb->data;
1379
a5e9d805 1380 status = BRCMF_FWS_RET_OK_NOSCHEDULE;
349e7104
AS		 1381 while (data_len > 0) {
1382 /* extract tlv info */
1383 type = signal_data[0];
1384
1385 /* FILLER type is actually not a TLV, but
1386 * a single byte that can be skipped.
1387 */
1388 if (type == BRCMF_FWS_TYPE_FILLER) {
1389 signal_data += 1;
1390 data_len -= 1;
1391 continue;
1392 }
1393 len = signal_data[1];
1394 data = signal_data + 2;
1395
2af15580
AS		 1396 brcmf_dbg(INFO, "tlv type=%d (%s), len=%d, data[0]=%d\n", type,
1397 brcmf_fws_get_tlv_name(type), len, *data);
1398
349e7104
AS		 1399 /* abort parsing when length invalid */
1400 if (data_len < len + 2)
1401 break;
1402
bb8c8063
AS		 1403 if (len != brcmf_fws_get_tlv_len(fws, type))
1404 break;
1405
a5e9d805 1406 err = BRCMF_FWS_RET_OK_NOSCHEDULE;
349e7104 1407 switch (type) {
349e7104 1408 case BRCMF_FWS_TYPE_HOST_REORDER_RXPKTS:
bb8c8063 1409 case BRCMF_FWS_TYPE_COMP_TXSTATUS:
ce814c1b 1410 break;
bb8c8063
AS		 1411 case BRCMF_FWS_TYPE_MACDESC_ADD:
1412 case BRCMF_FWS_TYPE_MACDESC_DEL:
ce814c1b 1413 brcmf_fws_macdesc_indicate(fws, type, data);
bb8c8063 1414 break;
33753d47
AS		 1415 case BRCMF_FWS_TYPE_MAC_OPEN:
1416 case BRCMF_FWS_TYPE_MAC_CLOSE:
a5e9d805 1417 err = brcmf_fws_macdesc_state_indicate(fws, type, data);
33753d47
AS		 1418 break;
1419 case BRCMF_FWS_TYPE_INTERFACE_OPEN:
1420 case BRCMF_FWS_TYPE_INTERFACE_CLOSE:
a5e9d805
AS		 1421 err = brcmf_fws_interface_state_indicate(fws, type,
1422 data);
33753d47 1423 break;
5f38b683
AS		 1424 case BRCMF_FWS_TYPE_MAC_REQUEST_CREDIT:
1425 case BRCMF_FWS_TYPE_MAC_REQUEST_PACKET:
a5e9d805 1426 err = brcmf_fws_request_indicate(fws, type, data);
5f38b683 1427 break;
3edc1cff
AS		 1428 case BRCMF_FWS_TYPE_TXSTATUS:
1429 brcmf_fws_txstatus_indicate(fws, data);
1430 break;
84bcc0c3 1431 case BRCMF_FWS_TYPE_FIFO_CREDITBACK:
a5e9d805 1432 err = brcmf_fws_fifocreditback_indicate(fws, data);
84bcc0c3 1433 break;
bb8c8063
AS		 1434 case BRCMF_FWS_TYPE_RSSI:
1435 brcmf_fws_rssi_indicate(fws, *data);
349e7104
AS		 1436 break;
1437 case BRCMF_FWS_TYPE_TRANS_ID:
349e7104
AS		 1438 brcmf_fws_dbg_seqnum_check(fws, data);
1439 break;
84bcc0c3
AS		 1440 case BRCMF_FWS_TYPE_PKTTAG:
1441 case BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP:
349e7104
AS		 1442 default:
1443 fws->stats.tlv_invalid_type++;
1444 break;
1445 }
a5e9d805
AS		 1446 if (err == BRCMF_FWS_RET_OK_SCHEDULE)
1447 status = BRCMF_FWS_RET_OK_SCHEDULE;
349e7104
AS		 1448 signal_data += len + 2;
1449 data_len -= len + 2;
1450 }
1451
1452 if (data_len != 0)
1453 fws->stats.tlv_parse_failed++;
1454
a5e9d805
AS		 1455 if (status == BRCMF_FWS_RET_OK_SCHEDULE)
1456 brcmf_fws_schedule_deq(fws);
1457
349e7104
AS		 1458 /* signalling processing result does
1459 * not affect the actual ethernet packet.
1460 */
1461 skb_pull(skb, signal_len);
1462
1463 /* this may be a signal-only packet
1464 */
1465 if (skb->len == 0)
1466 fws->stats.header_only_pkt++;
1467
1468 brcmf_fws_unlock(drvr, flags);
1469 return 0;
1470}
bb8c8063 1471
3edc1cff
AS		 1472static int brcmf_fws_hdrpush(struct brcmf_fws_info *fws, struct sk_buff *skb)
1473{
1474 struct brcmf_fws_mac_descriptor *entry = brcmf_skbcb(skb)->mac;
1475 u8 *wlh;
84bcc0c3 1476 u16 data_offset = 0;
3edc1cff
AS		 1477 u8 fillers;
1478 __le32 pkttag = cpu_to_le32(brcmf_skbcb(skb)->htod);
1479
1480 brcmf_dbg(TRACE, "enter: ea=%pM, ifidx=%u, pkttag=0x%08X\n",
1481 entry->ea, entry->interface_id, le32_to_cpu(pkttag));
84bcc0c3
AS		 1482 if (entry->send_tim_signal)
1483 data_offset += 2 + BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP_LEN;
1484
3edc1cff 1485 /* +2 is for Type[1] and Len[1] in TLV, plus TIM signal */
84bcc0c3 1486 data_offset += 2 + BRCMF_FWS_TYPE_PKTTAG_LEN;
3edc1cff
AS		 1487 fillers = round_up(data_offset, 4) - data_offset;
1488 data_offset += fillers;
1489
1490 skb_push(skb, data_offset);
1491 wlh = skb->data;
1492
1493 wlh[0] = BRCMF_FWS_TYPE_PKTTAG;
1494 wlh[1] = BRCMF_FWS_TYPE_PKTTAG_LEN;
1495 memcpy(&wlh[2], &pkttag, sizeof(pkttag));
1496 wlh += BRCMF_FWS_TYPE_PKTTAG_LEN + 2;
1497
84bcc0c3
AS		 1498 if (entry->send_tim_signal) {
1499 entry->send_tim_signal = 0;
1500 wlh[0] = BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP;
1501 wlh[1] = BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP_LEN;
1502 wlh[2] = entry->mac_handle;
1503 wlh[3] = entry->traffic_pending_bmp;
1504 wlh += BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP_LEN + 2;
1505 entry->traffic_lastreported_bmp = entry->traffic_pending_bmp;
1506 }
3edc1cff
AS		 1507 if (fillers)
1508 memset(wlh, BRCMF_FWS_TYPE_FILLER, fillers);
1509
1510 brcmf_proto_hdrpush(fws->drvr, brcmf_skb_if_flags_get_field(skb, INDEX),
1511 data_offset >> 2, skb);
1512 return 0;
1513}
1514
1515static int brcmf_fws_precommit_skb(struct brcmf_fws_info *fws, int fifo,
1516 struct sk_buff *p)
1517{
1518 struct brcmf_skbuff_cb *skcb = brcmf_skbcb(p);
1519 struct brcmf_fws_mac_descriptor *entry = skcb->mac;
1520 int rc = 0;
1521 bool header_needed;
1522 int hslot = BRCMF_FWS_HANGER_MAXITEMS;
1523 u8 free_ctr;
1524 u8 ifidx;
1525 u8 flags;
1526
84bcc0c3 1527 header_needed = skcb->state != BRCMF_FWS_SKBSTATE_SUPPRESSED;
3edc1cff
AS		 1528
1529 if (header_needed) {
1530 /* obtaining free slot may fail, but that will be caught
1531 * by the hanger push. This assures the packet has a BDC
1532 * header upon return.
1533 */
1534 hslot = brcmf_fws_hanger_get_free_slot(&fws->hanger);
1535 free_ctr = entry->seq[fifo];
1536 brcmf_skb_htod_tag_set_field(p, HSLOT, hslot);
1537 brcmf_skb_htod_tag_set_field(p, FREERUN, free_ctr);
1538 brcmf_skb_htod_tag_set_field(p, GENERATION, 1);
1539 entry->transit_count++;
1540 }
1541 brcmf_skb_if_flags_set_field(p, TRANSMIT, 1);
1542 brcmf_skb_htod_tag_set_field(p, FIFO, fifo);
1543
1544 flags = BRCMF_FWS_HTOD_FLAG_PKTFROMHOST;
1545 if (!(skcb->if_flags & BRCMF_SKB_IF_FLAGS_CREDITCHECK_MASK)) {
1546 /*
1547 Indicate that this packet is being sent in response to an
1548 explicit request from the firmware side.
1549 */
1550 flags |= BRCMF_FWS_HTOD_FLAG_PKT_REQUESTED;
1551 }
1552 brcmf_skb_htod_tag_set_field(p, FLAGS, flags);
1553 if (header_needed) {
1554 brcmf_fws_hdrpush(fws, p);
1555 rc = brcmf_fws_hanger_pushpkt(&fws->hanger, p, hslot);
1556 if (rc)
1557 brcmf_err("hanger push failed: rc=%d\n", rc);
1558 } else {
1559 int gen;
1560
1561 /* remove old header */
1562 rc = brcmf_proto_hdrpull(fws->drvr, false, &ifidx, p);
1563 if (rc == 0) {
1564 hslot = brcmf_skb_htod_tag_get_field(p, HSLOT);
1565 brcmf_fws_hanger_get_genbit(&fws->hanger, p,
1566 hslot, &gen);
1567 brcmf_skb_htod_tag_set_field(p, GENERATION, gen);
1568
1569 /* push new header */
1570 brcmf_fws_hdrpush(fws, p);
1571 }
1572 }
1573
1574 return rc;
1575}
1576
84bcc0c3
AS		 1577static int
1578brcmf_fws_rollback_toq(struct brcmf_fws_info *fws, struct sk_buff *skb)
1579{
1580 /*
1581 put the packet back to the head of queue
1582
1583 - suppressed packet goes back to suppress sub-queue
1584 - pull out the header, if new or delayed packet
1585
1586 Note: hslot is used only when header removal is done.
1587 */
1588 struct brcmf_fws_mac_descriptor *entry;
1589 enum brcmf_fws_skb_state state;
1590 struct sk_buff *pktout;
1591 int rc = 0;
1592 int fifo;
1593 int hslot;
1594 u8 ifidx;
1595
1596 fifo = brcmf_skb_if_flags_get_field(skb, FIFO);
1597 state = brcmf_skbcb(skb)->state;
1598 entry = brcmf_skbcb(skb)->mac;
1599
1600 if (entry != NULL) {
1601 if (state == BRCMF_FWS_SKBSTATE_SUPPRESSED) {
1602 /* wl-header is saved for suppressed packets */
1603 pktout = brcmu_pktq_penq_head(&entry->psq, 2 * fifo + 1,
1604 skb);
1605 if (pktout == NULL) {
1606 brcmf_err("suppress queue full\n");
1607 rc = -ENOSPC;
1608 }
1609 } else {
1610 hslot = brcmf_skb_htod_tag_get_field(skb, HSLOT);
1611
1612 /* remove header first */
1613 rc = brcmf_proto_hdrpull(fws->drvr, false, &ifidx, skb);
1614 if (rc) {
1615 brcmf_err("header removal failed\n");
1616 /* free the hanger slot */
1617 brcmf_fws_hanger_poppkt(&fws->hanger, hslot,
1618 &pktout, true);
1619 brcmf_txfinalize(fws->drvr, skb, false);
1620 rc = -EINVAL;
1621 goto fail;
1622 }
1623
1624 /* delay-q packets are going to delay-q */
1625 pktout = brcmu_pktq_penq_head(&entry->psq,
1626 2 * fifo, skb);
1627 if (pktout == NULL) {
1628 brcmf_err("delay queue full\n");
1629 rc = -ENOSPC;
1630 }
1631
1632 /* free the hanger slot */
1633 brcmf_fws_hanger_poppkt(&fws->hanger, hslot, &pktout,
1634 true);
1635
1636 /* decrement sequence count */
1637 entry->seq[fifo]--;
1638 }
1639 /*
1640 if this packet did not count against FIFO credit, it must have
1641 taken a requested_credit from the firmware (for pspoll etc.)
1642 */
1643 if (!(brcmf_skbcb(skb)->if_flags &
1644 BRCMF_SKB_IF_FLAGS_CREDITCHECK_MASK))
1645 entry->requested_credit++;
1646 } else {
1647 brcmf_err("no mac entry linked\n");
1648 rc = -ENOENT;
1649 }
1650
1651
1652fail:
1653 if (rc)
1654 fws->stats.rollback_failed++;
1655 else
1656 fws->stats.rollback_success++;
1657 return rc;
1658}
1659
1660static int brcmf_fws_consume_credit(struct brcmf_fws_info *fws, int fifo,
1661 struct sk_buff *skb)
1662{
1663 struct brcmf_fws_mac_descriptor *entry = brcmf_skbcb(skb)->mac;
1664 int *credit = &fws->fifo_credit[fifo];
1665 int use_credit = 1;
1666
1667 brcmf_dbg(TRACE, "enter: ac=%d, credits=%d\n", fifo, *credit);
1668
1669 if (entry->requested_credit > 0) {
1670 /*
1671 * if the packet was pulled out while destination is in
1672 * closed state but had a non-zero packets requested,
1673 * then this should not count against the FIFO credit.
1674 * That is due to the fact that the firmware will
1675 * most likely hold onto this packet until a suitable
1676 * time later to push it to the appropriate AC FIFO.
1677 */
1678 entry->requested_credit--;
1679 if (entry->state == BRCMF_FWS_STATE_CLOSE)
1680 use_credit = 0;
1681 } else if (entry->requested_packet > 0) {
1682 entry->requested_packet--;
1683 brcmf_skb_if_flags_set_field(skb, REQUESTED, 1);
1684 if (entry->state == BRCMF_FWS_STATE_CLOSE)
1685 use_credit = 0;
1686 }
1687 brcmf_skb_if_flags_set_field(skb, CREDITCHECK, use_credit);
1688 if (!use_credit) {
1689 brcmf_dbg(TRACE, "exit: no creditcheck set\n");
1690 return 0;
1691 }
1692
1693 if (!(*credit)) {
1694 brcmf_dbg(TRACE, "exit: credits depleted\n");
1695 return -ENAVAIL;
1696 }
1697 (*credit)--;
1698 if (!(*credit))
1699 fws->fifo_credit_map &= ~(1 << fifo);
1700 brcmf_dbg(TRACE, "exit: ac=%d, credits=%d\n", fifo, *credit);
1701 return 0;
1702}
1703
3edc1cff
AS		 1704static int brcmf_fws_commit_skb(struct brcmf_fws_info *fws, int fifo,
1705 struct sk_buff *skb)
1706{
1707 struct brcmf_skbuff_cb *skcb = brcmf_skbcb(skb);
1708 struct brcmf_fws_mac_descriptor *entry;
1709 struct brcmf_bus *bus = fws->drvr->bus_if;
1710 int rc;
1711
1712 entry = skcb->mac;
1713 if (IS_ERR(entry))
1714 return PTR_ERR(entry);
1715
1716 rc = brcmf_fws_precommit_skb(fws, fifo, skb);
1717 if (rc < 0) {
1718 fws->stats.generic_error++;
84bcc0c3 1719 goto rollback;
3edc1cff
AS		 1720 }
1721
1722 rc = brcmf_bus_txdata(bus, skb);
1723 if (rc < 0)
84bcc0c3 1724 goto rollback;
3edc1cff
AS		 1725
1726 entry->seq[fifo]++;
1727 fws->stats.pkt2bus++;
84bcc0c3
AS		 1728 if (brcmf_skbcb(skb)->if_flags & BRCMF_SKB_IF_FLAGS_CREDITCHECK_MASK) {
1729 fws->stats.send_pkts[fifo]++;
1730 fws->stats.fifo_credits_sent[fifo]++;
1731 }
1732
3edc1cff
AS		 1733 return rc;
1734
84bcc0c3
AS		 1735rollback:
1736 rc = brcmf_fws_rollback_toq(fws, skb);
3edc1cff
AS		 1737 return rc;
1738}
1739
1740int brcmf_fws_process_skb(struct brcmf_if *ifp, struct sk_buff *skb)
1741{
1742 struct brcmf_pub *drvr = ifp->drvr;
1743 struct brcmf_skbuff_cb *skcb = brcmf_skbcb(skb);
1744 struct ethhdr *eh = (struct ethhdr *)(skb->data);
1745 ulong flags;
3edc1cff
AS		 1746 int fifo = BRCMF_FWS_FIFO_BCMC;
1747 bool multicast = is_multicast_ether_addr(eh->h_dest);
1748
1749 /* determine the priority */
1750 if (!skb->priority)
1751 skb->priority = cfg80211_classify8021d(skb);
1752
1753 drvr->tx_multicast += !!multicast;
1754 if (ntohs(eh->h_proto) == ETH_P_PAE)
1755 atomic_inc(&ifp->pend_8021x_cnt);
1756
1757 if (!brcmf_fws_fc_active(drvr->fws)) {
1758 /* If the protocol uses a data header, apply it */
31ed07dc 1759 brcmf_proto_hdrpush(drvr, ifp->ifidx, 0, skb);
3edc1cff
AS		 1760
1761 /* Use bus module to send data frame */
1762 return brcmf_bus_txdata(drvr->bus_if, skb);
1763 }
1764
1765 /* set control buffer information */
84bcc0c3 1766 skcb->if_flags = 0;
f97a7f06 1767 skcb->mac = brcmf_fws_find_mac_desc(drvr->fws, ifp, eh->h_dest);
3edc1cff 1768 skcb->state = BRCMF_FWS_SKBSTATE_NEW;
31ed07dc 1769 brcmf_skb_if_flags_set_field(skb, INDEX, ifp->ifidx);
3edc1cff
AS		 1770 if (!multicast)
1771 fifo = brcmf_fws_prio2fifo[skb->priority];
1772 brcmf_skb_if_flags_set_field(skb, FIFO, fifo);
3edc1cff
AS		 1773
1774 brcmf_dbg(TRACE, "ea=%pM, multi=%d, fifo=%d\n", eh->h_dest,
1775 multicast, fifo);
1776
1777 brcmf_fws_lock(drvr, flags);
9fc60224 1778 if (skcb->mac->suppressed ||
b75c1a30 1779 brcmf_fws_mac_desc_closed(drvr->fws, skcb->mac, fifo) ||
9fc60224 1780 brcmu_pktq_mlen(&skcb->mac->psq, 3 << (fifo * 2)) ||
84bcc0c3
AS		 1781 (!multicast &&
1782 brcmf_fws_consume_credit(drvr->fws, fifo, skb) < 0)) {
1783 /* enqueue the packet in delayQ */
1784 drvr->fws->fifo_delay_map |= 1 << fifo;
1785 brcmf_fws_enq(drvr->fws, BRCMF_FWS_SKBSTATE_DELAYED, fifo, skb);
1786 } else {
1787 brcmf_fws_commit_skb(drvr->fws, fifo, skb);
1788 }
3edc1cff
AS		 1789 brcmf_fws_unlock(drvr, flags);
1790 return 0;
1791}
1792
bb8c8063
AS		 1793void brcmf_fws_reset_interface(struct brcmf_if *ifp)
1794{
1795 struct brcmf_fws_mac_descriptor *entry = ifp->fws_desc;
1796
1797 brcmf_dbg(TRACE, "enter: idx=%d\n", ifp->bssidx);
1798 if (!entry)
1799 return;
1800
ce814c1b 1801 brcmf_fws_init_mac_descriptor(entry, ifp->mac_addr, ifp->ifidx);
bb8c8063
AS		 1802}
1803
1804void brcmf_fws_add_interface(struct brcmf_if *ifp)
1805{
84bcc0c3 1806 struct brcmf_fws_info *fws = ifp->drvr->fws;
bb8c8063
AS		 1807 struct brcmf_fws_mac_descriptor *entry;
1808
1809 brcmf_dbg(TRACE, "enter: idx=%d, mac=%pM\n",
1810 ifp->bssidx, ifp->mac_addr);
01b8e7db 1811 if (!ifp->ndev || !ifp->drvr->fw_signals)
bb8c8063
AS		 1812 return;
1813
84bcc0c3
AS		 1814 entry = &fws->desc.iface[ifp->ifidx];
1815 ifp->fws_desc = entry;
1816 brcmf_fws_init_mac_descriptor(entry, ifp->mac_addr, ifp->ifidx);
1817 brcmu_pktq_init(&entry->psq, BRCMF_FWS_PSQ_PREC_COUNT,
1818 BRCMF_FWS_PSQ_LEN);
bb8c8063
AS		 1819}
1820
1821void brcmf_fws_del_interface(struct brcmf_if *ifp)
1822{
1823 struct brcmf_fws_mac_descriptor *entry = ifp->fws_desc;
1824
1825 brcmf_dbg(TRACE, "enter: idx=%d\n", ifp->bssidx);
1826 if (!entry)
1827 return;
1828
1829 ifp->fws_desc = NULL;
ce814c1b 1830 brcmf_fws_clear_mac_descriptor(entry);
a3e993c7 1831 brcmf_fws_cleanup(ifp->drvr->fws, ifp->ifidx);
84bcc0c3
AS		 1832}
1833
1834static void brcmf_fws_dequeue_worker(struct work_struct *worker)
1835{
1836 struct brcmf_fws_info *fws;
1837 struct sk_buff *skb;
1838 ulong flags;
1839 int fifo;
1840 int credit;
1841
1842 fws = container_of(worker, struct brcmf_fws_info, fws_dequeue_work);
1843
1844 brcmf_dbg(TRACE, "enter: fws=%p\n", fws);
1845 brcmf_fws_lock(fws->drvr, flags);
1846 for (fifo = NL80211_NUM_ACS; fifo >= 0; fifo--) {
1847 brcmf_dbg(TRACE, "fifo %d credit %d\n", fifo,
1848 fws->fifo_credit[fifo]);
1849 for (credit = 0; credit < fws->fifo_credit[fifo]; /* nop */) {
1850 skb = brcmf_fws_deq(fws, fifo);
1851 if (!skb)
1852 break;
1853 if (!brcmf_fws_commit_skb(fws, fifo, skb) &&
1854 brcmf_skbcb(skb)->if_flags &
1855 BRCMF_SKB_IF_FLAGS_CREDITCHECK_MASK)
1856 credit++;
1857 }
1858 fws->fifo_credit[fifo] -= credit;
1859 }
1860 brcmf_fws_unlock(fws->drvr, flags);
bb8c8063 1861}
c7f34a69 1862
d9337414
AS		 1863int brcmf_fws_init(struct brcmf_pub *drvr)
1864{
290fb763 1865 u32 tlv = BRCMF_FWS_FLAGS_RSSI_SIGNALS;
d9337414
AS		 1866 int rc;
1867
47829f4f
AS		 1868 if (!drvr->fw_signals)
1869 return 0;
1870
d9337414
AS		 1871 spin_lock_init(&drvr->fws_spinlock);
1872
1873 drvr->fws = kzalloc(sizeof(*(drvr->fws)), GFP_KERNEL);
1874 if (!drvr->fws) {
1875 rc = -ENOMEM;
1876 goto fail;
1877 }
1878
1879 /* set linkage back */
1880 drvr->fws->drvr = drvr;
1881 drvr->fws->fcmode = fcmode;
1882
84bcc0c3
AS		 1883 drvr->fws->fws_wq = create_singlethread_workqueue("brcmf_fws_wq");
1884 if (drvr->fws->fws_wq == NULL) {
1885 brcmf_err("workqueue creation failed\n");
1886 rc = -EBADF;
1887 goto fail;
1888 }
1889 INIT_WORK(&drvr->fws->fws_dequeue_work, brcmf_fws_dequeue_worker);
1890
290fb763
AS		 1891 /* enable firmware signalling if fcmode active */
1892 if (drvr->fws->fcmode != BRCMF_FWS_FCMODE_NONE)
1893 tlv |= BRCMF_FWS_FLAGS_XONXOFF_SIGNALS |
33753d47
AS		 1894 BRCMF_FWS_FLAGS_CREDIT_STATUS_SIGNALS |
1895 BRCMF_FWS_FLAGS_HOST_PROPTXSTATUS_ACTIVE;
290fb763 1896
d9337414
AS		 1897 rc = brcmf_fil_iovar_int_set(drvr->iflist[0], "tlv", tlv);
1898 if (rc < 0) {
1899 brcmf_err("failed to set bdcv2 tlv signaling\n");
1900 goto fail;
1901 }
1902
1903 if (brcmf_fweh_register(drvr, BRCMF_E_FIFO_CREDIT_MAP,
1904 brcmf_fws_notify_credit_map)) {
1905 brcmf_err("register credit map handler failed\n");
1906 goto fail;
1907 }
1908
1909 brcmf_fws_hanger_init(&drvr->fws->hanger);
84bcc0c3
AS		 1910 brcmf_fws_init_mac_descriptor(&drvr->fws->desc.other, NULL, 0);
1911 brcmu_pktq_init(&drvr->fws->desc.other.psq, BRCMF_FWS_PSQ_PREC_COUNT,
1912 BRCMF_FWS_PSQ_LEN);
d9337414
AS		 1913
1914 /* create debugfs file for statistics */
1915 brcmf_debugfs_create_fws_stats(drvr, &drvr->fws->stats);
1916
1917 /* TODO: remove upon feature delivery */
1918 brcmf_err("%s bdcv2 tlv signaling [%x]\n",
1919 drvr->fw_signals ? "enabled" : "disabled", tlv);
1920 return 0;
1921
1922fail:
1923 /* disable flow control entirely */
1924 drvr->fw_signals = false;
1925 brcmf_fws_deinit(drvr);
1926 return rc;
1927}
1928
1929void brcmf_fws_deinit(struct brcmf_pub *drvr)
1930{
1931 struct brcmf_fws_info *fws = drvr->fws;
1932 ulong flags;
1933
47829f4f
AS		 1934 if (!fws)
1935 return;
1936
d9337414
AS		 1937 /* cleanup */
1938 brcmf_fws_lock(drvr, flags);
1939 brcmf_fws_cleanup(fws, -1);
1940 drvr->fws = NULL;
1941 brcmf_fws_unlock(drvr, flags);
1942
1943 /* free top structure */
1944 kfree(fws);
1945}
1946
c7f34a69
AS		 1947bool brcmf_fws_fc_active(struct brcmf_fws_info *fws)
1948{
1949 if (!fws)
1950 return false;
1951
1952 brcmf_dbg(TRACE, "enter: mode=%d\n", fws->fcmode);
1953 return fws->fcmode != BRCMF_FWS_FCMODE_NONE;
1954}
0f8b5cc5
AS		 1955
1956void brcmf_fws_bustxfail(struct brcmf_fws_info *fws, struct sk_buff *skb)
1957{
1958 ulong flags;
1959
1960 brcmf_fws_lock(fws->drvr, flags);
1961 brcmf_fws_txstatus_process(fws, BRCMF_FWS_TXSTATUS_FW_TOSSED,
84bcc0c3
AS		 1962 brcmf_skb_htod_tag_get_field(skb, HSLOT), 0);
1963 /* the packet never reached firmware so reclaim credit */
1964 if (fws->fcmode == BRCMF_FWS_FCMODE_EXPLICIT_CREDIT &&
1965 brcmf_skbcb(skb)->if_flags & BRCMF_SKB_IF_FLAGS_CREDITCHECK_MASK) {
1966 brcmf_fws_return_credits(fws,
1967 brcmf_skb_htod_tag_get_field(skb,
1968 FIFO),
1969 1);
1970 brcmf_fws_schedule_deq(fws);
1971 }
0f8b5cc5
AS		 1972 brcmf_fws_unlock(fws->drvr, flags);
1973}
Linux kernel - Deliverables
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