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Merge tag 'mvebu-fixes-3.19' of git://git.infradead.org/linux-mvebu into fixes
[deliverable/linux.git] / drivers / net / wireless / brcm80211 / brcmfmac / fwsignal.c
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>
17 #include <linux/module.h>
18 #include <linux/if_ether.h>
19 #include <linux/spinlock.h>
20 #include <linux/skbuff.h>
21 #include <linux/netdevice.h>
22 #include <linux/etherdevice.h>
23 #include <linux/err.h>
24 #include <linux/jiffies.h>
25 #include <net/cfg80211.h>
26
27 #include <brcmu_utils.h>
28 #include <brcmu_wifi.h>
29 #include "core.h"
30 #include "debug.h"
31 #include "bus.h"
32 #include "fwil.h"
33 #include "fwil_types.h"
34 #include "fweh.h"
35 #include "fwsignal.h"
36 #include "p2p.h"
37 #include "cfg80211.h"
38 #include "proto.h"
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) \
65 BRCMF_FWS_TLV_DEF(FIFO_CREDITBACK, 11, 6) \
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
73 /*
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,
78 enum brcmf_fws_tlv_type {
79 BRCMF_FWS_TLV_DEFLIST
80 BRCMF_FWS_TYPE_INVALID
81 };
82 #undef BRCMF_FWS_TLV_DEF
83
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),
89 enum brcmf_fws_tlv_len {
90 BRCMF_FWS_TLV_DEFLIST
91 };
92 #undef BRCMF_FWS_TLV_DEF
93
94 #ifdef DEBUG
95 /*
96 * brcmf_fws_tlv_names - array of tlv names.
97 */
98 #define BRCMF_FWS_TLV_DEF(name, id, len) \
99 { id, #name },
100 static 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
108
109 static const char *brcmf_fws_get_tlv_name(enum brcmf_fws_tlv_type id)
110 {
111 int i;
112
113 for (i = 0; i < ARRAY_SIZE(brcmf_fws_tlv_names); i++)
114 if (brcmf_fws_tlv_names[i].id == id)
115 return brcmf_fws_tlv_names[i].name;
116
117 return "INVALID";
118 }
119 #else
120 static const char *brcmf_fws_get_tlv_name(enum brcmf_fws_tlv_type id)
121 {
122 return "NODEBUG";
123 }
124 #endif /* DEBUG */
125
126 /*
127 * The PKTTAG tlv has additional bytes when firmware-signalling
128 * mode has REUSESEQ flag set.
129 */
130 #define BRCMF_FWS_TYPE_SEQ_LEN 2
131
132 /*
133 * flags used to enable tlv signalling from firmware.
134 */
135 #define BRCMF_FWS_FLAGS_RSSI_SIGNALS 0x0001
136 #define BRCMF_FWS_FLAGS_XONXOFF_SIGNALS 0x0002
137 #define BRCMF_FWS_FLAGS_CREDIT_STATUS_SIGNALS 0x0004
138 #define BRCMF_FWS_FLAGS_HOST_PROPTXSTATUS_ACTIVE 0x0008
139 #define BRCMF_FWS_FLAGS_PSQ_GENERATIONFSM_ENABLE 0x0010
140 #define BRCMF_FWS_FLAGS_PSQ_ZERO_BUFFER_ENABLE 0x0020
141 #define BRCMF_FWS_FLAGS_HOST_RXREORDER_ACTIVE 0x0040
142
143 #define BRCMF_FWS_MAC_DESC_TABLE_SIZE 32
144 #define BRCMF_FWS_MAC_DESC_ID_INVALID 0xff
145
146 #define BRCMF_FWS_HOSTIF_FLOWSTATE_OFF 0
147 #define BRCMF_FWS_HOSTIF_FLOWSTATE_ON 1
148 #define BRCMF_FWS_FLOWCONTROL_HIWATER 128
149 #define BRCMF_FWS_FLOWCONTROL_LOWATER 64
150
151 #define BRCMF_FWS_PSQ_PREC_COUNT ((BRCMF_FWS_FIFO_COUNT + 1) * 2)
152 #define BRCMF_FWS_PSQ_LEN 256
153
154 #define BRCMF_FWS_HTOD_FLAG_PKTFROMHOST 0x01
155 #define BRCMF_FWS_HTOD_FLAG_PKT_REQUESTED 0x02
156
157 #define BRCMF_FWS_RET_OK_NOSCHEDULE 0
158 #define BRCMF_FWS_RET_OK_SCHEDULE 1
159
160 #define BRCMF_FWS_MODE_REUSESEQ_SHIFT 3 /* seq reuse */
161 #define BRCMF_FWS_MODE_SET_REUSESEQ(x, val) ((x) = \
162 ((x) & ~(1 << BRCMF_FWS_MODE_REUSESEQ_SHIFT)) | \
163 (((val) & 1) << BRCMF_FWS_MODE_REUSESEQ_SHIFT))
164 #define BRCMF_FWS_MODE_GET_REUSESEQ(x) \
165 (((x) >> BRCMF_FWS_MODE_REUSESEQ_SHIFT) & 1)
166
167 /**
168 * enum brcmf_fws_skb_state - indicates processing state of skb.
169 *
170 * @BRCMF_FWS_SKBSTATE_NEW: sk_buff is newly arrived in the driver.
171 * @BRCMF_FWS_SKBSTATE_DELAYED: sk_buff had to wait on queue.
172 * @BRCMF_FWS_SKBSTATE_SUPPRESSED: sk_buff has been suppressed by firmware.
173 * @BRCMF_FWS_SKBSTATE_TIM: allocated for TIM update info.
174 */
175 enum brcmf_fws_skb_state {
176 BRCMF_FWS_SKBSTATE_NEW,
177 BRCMF_FWS_SKBSTATE_DELAYED,
178 BRCMF_FWS_SKBSTATE_SUPPRESSED,
179 BRCMF_FWS_SKBSTATE_TIM
180 };
181
182 /**
183 * struct brcmf_skbuff_cb - control buffer associated with skbuff.
184 *
185 * @bus_flags: 2 bytes reserved for bus specific parameters
186 * @if_flags: holds interface index and packet related flags.
187 * @htod: host to device packet identifier (used in PKTTAG tlv).
188 * @htod_seq: this 16-bit is original seq number for every suppress packet.
189 * @state: transmit state of the packet.
190 * @mac: descriptor related to destination for this packet.
191 *
192 * This information is stored in control buffer struct sk_buff::cb, which
193 * provides 48 bytes of storage so this structure should not exceed that.
194 */
195 struct brcmf_skbuff_cb {
196 u16 bus_flags;
197 u16 if_flags;
198 u32 htod;
199 u16 htod_seq;
200 enum brcmf_fws_skb_state state;
201 struct brcmf_fws_mac_descriptor *mac;
202 };
203
204 /*
205 * macro casting skbuff control buffer to struct brcmf_skbuff_cb.
206 */
207 #define brcmf_skbcb(skb) ((struct brcmf_skbuff_cb *)((skb)->cb))
208
209 /*
210 * sk_buff control if flags
211 *
212 * b[11] - packet sent upon firmware request.
213 * b[10] - packet only contains signalling data.
214 * b[9] - packet is a tx packet.
215 * b[8] - packet used requested credit
216 * b[7] - interface in AP mode.
217 * b[3:0] - interface index.
218 */
219 #define BRCMF_SKB_IF_FLAGS_REQUESTED_MASK 0x0800
220 #define BRCMF_SKB_IF_FLAGS_REQUESTED_SHIFT 11
221 #define BRCMF_SKB_IF_FLAGS_SIGNAL_ONLY_MASK 0x0400
222 #define BRCMF_SKB_IF_FLAGS_SIGNAL_ONLY_SHIFT 10
223 #define BRCMF_SKB_IF_FLAGS_TRANSMIT_MASK 0x0200
224 #define BRCMF_SKB_IF_FLAGS_TRANSMIT_SHIFT 9
225 #define BRCMF_SKB_IF_FLAGS_REQ_CREDIT_MASK 0x0100
226 #define BRCMF_SKB_IF_FLAGS_REQ_CREDIT_SHIFT 8
227 #define BRCMF_SKB_IF_FLAGS_IF_AP_MASK 0x0080
228 #define BRCMF_SKB_IF_FLAGS_IF_AP_SHIFT 7
229 #define BRCMF_SKB_IF_FLAGS_INDEX_MASK 0x000f
230 #define BRCMF_SKB_IF_FLAGS_INDEX_SHIFT 0
231
232 #define brcmf_skb_if_flags_set_field(skb, field, value) \
233 brcmu_maskset16(&(brcmf_skbcb(skb)->if_flags), \
234 BRCMF_SKB_IF_FLAGS_ ## field ## _MASK, \
235 BRCMF_SKB_IF_FLAGS_ ## field ## _SHIFT, (value))
236 #define brcmf_skb_if_flags_get_field(skb, field) \
237 brcmu_maskget16(brcmf_skbcb(skb)->if_flags, \
238 BRCMF_SKB_IF_FLAGS_ ## field ## _MASK, \
239 BRCMF_SKB_IF_FLAGS_ ## field ## _SHIFT)
240
241 /*
242 * sk_buff control packet identifier
243 *
244 * 32-bit packet identifier used in PKTTAG tlv from host to dongle.
245 *
246 * - Generated at the host (e.g. dhd)
247 * - Seen as a generic sequence number by firmware except for the flags field.
248 *
249 * Generation : b[31] => generation number for this packet [host->fw]
250 * OR, current generation number [fw->host]
251 * Flags : b[30:27] => command, status flags
252 * FIFO-AC : b[26:24] => AC-FIFO id
253 * h-slot : b[23:8] => hanger-slot
254 * freerun : b[7:0] => A free running counter
255 */
256 #define BRCMF_SKB_HTOD_TAG_GENERATION_MASK 0x80000000
257 #define BRCMF_SKB_HTOD_TAG_GENERATION_SHIFT 31
258 #define BRCMF_SKB_HTOD_TAG_FLAGS_MASK 0x78000000
259 #define BRCMF_SKB_HTOD_TAG_FLAGS_SHIFT 27
260 #define BRCMF_SKB_HTOD_TAG_FIFO_MASK 0x07000000
261 #define BRCMF_SKB_HTOD_TAG_FIFO_SHIFT 24
262 #define BRCMF_SKB_HTOD_TAG_HSLOT_MASK 0x00ffff00
263 #define BRCMF_SKB_HTOD_TAG_HSLOT_SHIFT 8
264 #define BRCMF_SKB_HTOD_TAG_FREERUN_MASK 0x000000ff
265 #define BRCMF_SKB_HTOD_TAG_FREERUN_SHIFT 0
266
267 #define brcmf_skb_htod_tag_set_field(skb, field, value) \
268 brcmu_maskset32(&(brcmf_skbcb(skb)->htod), \
269 BRCMF_SKB_HTOD_TAG_ ## field ## _MASK, \
270 BRCMF_SKB_HTOD_TAG_ ## field ## _SHIFT, (value))
271 #define brcmf_skb_htod_tag_get_field(skb, field) \
272 brcmu_maskget32(brcmf_skbcb(skb)->htod, \
273 BRCMF_SKB_HTOD_TAG_ ## field ## _MASK, \
274 BRCMF_SKB_HTOD_TAG_ ## field ## _SHIFT)
275
276 #define BRCMF_SKB_HTOD_SEQ_FROMFW_MASK 0x2000
277 #define BRCMF_SKB_HTOD_SEQ_FROMFW_SHIFT 13
278 #define BRCMF_SKB_HTOD_SEQ_FROMDRV_MASK 0x1000
279 #define BRCMF_SKB_HTOD_SEQ_FROMDRV_SHIFT 12
280 #define BRCMF_SKB_HTOD_SEQ_NR_MASK 0x0fff
281 #define BRCMF_SKB_HTOD_SEQ_NR_SHIFT 0
282
283 #define brcmf_skb_htod_seq_set_field(skb, field, value) \
284 brcmu_maskset16(&(brcmf_skbcb(skb)->htod_seq), \
285 BRCMF_SKB_HTOD_SEQ_ ## field ## _MASK, \
286 BRCMF_SKB_HTOD_SEQ_ ## field ## _SHIFT, (value))
287 #define brcmf_skb_htod_seq_get_field(skb, field) \
288 brcmu_maskget16(brcmf_skbcb(skb)->htod_seq, \
289 BRCMF_SKB_HTOD_SEQ_ ## field ## _MASK, \
290 BRCMF_SKB_HTOD_SEQ_ ## field ## _SHIFT)
291
292 #define BRCMF_FWS_TXSTAT_GENERATION_MASK 0x80000000
293 #define BRCMF_FWS_TXSTAT_GENERATION_SHIFT 31
294 #define BRCMF_FWS_TXSTAT_FLAGS_MASK 0x78000000
295 #define BRCMF_FWS_TXSTAT_FLAGS_SHIFT 27
296 #define BRCMF_FWS_TXSTAT_FIFO_MASK 0x07000000
297 #define BRCMF_FWS_TXSTAT_FIFO_SHIFT 24
298 #define BRCMF_FWS_TXSTAT_HSLOT_MASK 0x00FFFF00
299 #define BRCMF_FWS_TXSTAT_HSLOT_SHIFT 8
300 #define BRCMF_FWS_TXSTAT_FREERUN_MASK 0x000000FF
301 #define BRCMF_FWS_TXSTAT_FREERUN_SHIFT 0
302
303 #define brcmf_txstatus_get_field(txs, field) \
304 brcmu_maskget32(txs, BRCMF_FWS_TXSTAT_ ## field ## _MASK, \
305 BRCMF_FWS_TXSTAT_ ## field ## _SHIFT)
306
307 /* How long to defer borrowing in jiffies */
308 #define BRCMF_FWS_BORROW_DEFER_PERIOD (HZ / 10)
309
310 /**
311 * enum brcmf_fws_fifo - fifo indices used by dongle firmware.
312 *
313 * @BRCMF_FWS_FIFO_FIRST: first fifo, ie. background.
314 * @BRCMF_FWS_FIFO_AC_BK: fifo for background traffic.
315 * @BRCMF_FWS_FIFO_AC_BE: fifo for best-effort traffic.
316 * @BRCMF_FWS_FIFO_AC_VI: fifo for video traffic.
317 * @BRCMF_FWS_FIFO_AC_VO: fifo for voice traffic.
318 * @BRCMF_FWS_FIFO_BCMC: fifo for broadcast/multicast (AP only).
319 * @BRCMF_FWS_FIFO_ATIM: fifo for ATIM (AP only).
320 * @BRCMF_FWS_FIFO_COUNT: number of fifos.
321 */
322 enum brcmf_fws_fifo {
323 BRCMF_FWS_FIFO_FIRST,
324 BRCMF_FWS_FIFO_AC_BK = BRCMF_FWS_FIFO_FIRST,
325 BRCMF_FWS_FIFO_AC_BE,
326 BRCMF_FWS_FIFO_AC_VI,
327 BRCMF_FWS_FIFO_AC_VO,
328 BRCMF_FWS_FIFO_BCMC,
329 BRCMF_FWS_FIFO_ATIM,
330 BRCMF_FWS_FIFO_COUNT
331 };
332
333 /**
334 * enum brcmf_fws_txstatus - txstatus flag values.
335 *
336 * @BRCMF_FWS_TXSTATUS_DISCARD:
337 * host is free to discard the packet.
338 * @BRCMF_FWS_TXSTATUS_CORE_SUPPRESS:
339 * 802.11 core suppressed the packet.
340 * @BRCMF_FWS_TXSTATUS_FW_PS_SUPPRESS:
341 * firmware suppress the packet as device is already in PS mode.
342 * @BRCMF_FWS_TXSTATUS_FW_TOSSED:
343 * firmware tossed the packet.
344 * @BRCMF_FWS_TXSTATUS_HOST_TOSSED:
345 * host tossed the packet.
346 */
347 enum brcmf_fws_txstatus {
348 BRCMF_FWS_TXSTATUS_DISCARD,
349 BRCMF_FWS_TXSTATUS_CORE_SUPPRESS,
350 BRCMF_FWS_TXSTATUS_FW_PS_SUPPRESS,
351 BRCMF_FWS_TXSTATUS_FW_TOSSED,
352 BRCMF_FWS_TXSTATUS_HOST_TOSSED
353 };
354
355 enum brcmf_fws_fcmode {
356 BRCMF_FWS_FCMODE_NONE,
357 BRCMF_FWS_FCMODE_IMPLIED_CREDIT,
358 BRCMF_FWS_FCMODE_EXPLICIT_CREDIT
359 };
360
361 enum brcmf_fws_mac_desc_state {
362 BRCMF_FWS_STATE_OPEN = 1,
363 BRCMF_FWS_STATE_CLOSE
364 };
365
366 /**
367 * struct brcmf_fws_mac_descriptor - firmware signalling data per node/interface
368 *
369 * @occupied: slot is in use.
370 * @mac_handle: handle for mac entry determined by firmware.
371 * @interface_id: interface index.
372 * @state: current state.
373 * @suppressed: mac entry is suppressed.
374 * @generation: generation bit.
375 * @ac_bitmap: ac queue bitmap.
376 * @requested_credit: credits requested by firmware.
377 * @ea: ethernet address.
378 * @seq: per-node free-running sequence.
379 * @psq: power-save queue.
380 * @transit_count: packet in transit to firmware.
381 */
382 struct brcmf_fws_mac_descriptor {
383 char name[16];
384 u8 occupied;
385 u8 mac_handle;
386 u8 interface_id;
387 u8 state;
388 bool suppressed;
389 u8 generation;
390 u8 ac_bitmap;
391 u8 requested_credit;
392 u8 requested_packet;
393 u8 ea[ETH_ALEN];
394 u8 seq[BRCMF_FWS_FIFO_COUNT];
395 struct pktq psq;
396 int transit_count;
397 int suppr_transit_count;
398 bool send_tim_signal;
399 u8 traffic_pending_bmp;
400 u8 traffic_lastreported_bmp;
401 };
402
403 #define BRCMF_FWS_HANGER_MAXITEMS 1024
404
405 /**
406 * enum brcmf_fws_hanger_item_state - state of hanger item.
407 *
408 * @BRCMF_FWS_HANGER_ITEM_STATE_FREE: item is free for use.
409 * @BRCMF_FWS_HANGER_ITEM_STATE_INUSE: item is in use.
410 * @BRCMF_FWS_HANGER_ITEM_STATE_INUSE_SUPPRESSED: item was suppressed.
411 */
412 enum brcmf_fws_hanger_item_state {
413 BRCMF_FWS_HANGER_ITEM_STATE_FREE = 1,
414 BRCMF_FWS_HANGER_ITEM_STATE_INUSE,
415 BRCMF_FWS_HANGER_ITEM_STATE_INUSE_SUPPRESSED
416 };
417
418
419 /**
420 * struct brcmf_fws_hanger_item - single entry for tx pending packet.
421 *
422 * @state: entry is either free or occupied.
423 * @pkt: packet itself.
424 */
425 struct brcmf_fws_hanger_item {
426 enum brcmf_fws_hanger_item_state state;
427 struct sk_buff *pkt;
428 };
429
430 /**
431 * struct brcmf_fws_hanger - holds packets awaiting firmware txstatus.
432 *
433 * @pushed: packets pushed to await txstatus.
434 * @popped: packets popped upon handling txstatus.
435 * @failed_to_push: packets that could not be pushed.
436 * @failed_to_pop: packets that could not be popped.
437 * @failed_slotfind: packets for which failed to find an entry.
438 * @slot_pos: last returned item index for a free entry.
439 * @items: array of hanger items.
440 */
441 struct brcmf_fws_hanger {
442 u32 pushed;
443 u32 popped;
444 u32 failed_to_push;
445 u32 failed_to_pop;
446 u32 failed_slotfind;
447 u32 slot_pos;
448 struct brcmf_fws_hanger_item items[BRCMF_FWS_HANGER_MAXITEMS];
449 };
450
451 struct brcmf_fws_macdesc_table {
452 struct brcmf_fws_mac_descriptor nodes[BRCMF_FWS_MAC_DESC_TABLE_SIZE];
453 struct brcmf_fws_mac_descriptor iface[BRCMF_MAX_IFS];
454 struct brcmf_fws_mac_descriptor other;
455 };
456
457 struct brcmf_fws_stats {
458 u32 tlv_parse_failed;
459 u32 tlv_invalid_type;
460 u32 header_only_pkt;
461 u32 header_pulls;
462 u32 pkt2bus;
463 u32 send_pkts[5];
464 u32 requested_sent[5];
465 u32 generic_error;
466 u32 mac_update_failed;
467 u32 mac_ps_update_failed;
468 u32 if_update_failed;
469 u32 packet_request_failed;
470 u32 credit_request_failed;
471 u32 rollback_success;
472 u32 rollback_failed;
473 u32 delayq_full_error;
474 u32 supprq_full_error;
475 u32 txs_indicate;
476 u32 txs_discard;
477 u32 txs_supp_core;
478 u32 txs_supp_ps;
479 u32 txs_tossed;
480 u32 txs_host_tossed;
481 u32 bus_flow_block;
482 u32 fws_flow_block;
483 };
484
485 struct brcmf_fws_info {
486 struct brcmf_pub *drvr;
487 spinlock_t spinlock;
488 ulong flags;
489 struct brcmf_fws_stats stats;
490 struct brcmf_fws_hanger hanger;
491 enum brcmf_fws_fcmode fcmode;
492 bool fw_signals;
493 bool bcmc_credit_check;
494 struct brcmf_fws_macdesc_table desc;
495 struct workqueue_struct *fws_wq;
496 struct work_struct fws_dequeue_work;
497 u32 fifo_enqpkt[BRCMF_FWS_FIFO_COUNT];
498 int fifo_credit[BRCMF_FWS_FIFO_COUNT];
499 int credits_borrowed[BRCMF_FWS_FIFO_AC_VO + 1];
500 int deq_node_pos[BRCMF_FWS_FIFO_COUNT];
501 u32 fifo_credit_map;
502 u32 fifo_delay_map;
503 unsigned long borrow_defer_timestamp;
504 bool bus_flow_blocked;
505 bool creditmap_received;
506 u8 mode;
507 bool avoid_queueing;
508 };
509
510 /*
511 * brcmf_fws_prio2fifo - mapping from 802.1d priority to firmware fifo index.
512 */
513 static const int brcmf_fws_prio2fifo[] = {
514 BRCMF_FWS_FIFO_AC_BE,
515 BRCMF_FWS_FIFO_AC_BK,
516 BRCMF_FWS_FIFO_AC_BK,
517 BRCMF_FWS_FIFO_AC_BE,
518 BRCMF_FWS_FIFO_AC_VI,
519 BRCMF_FWS_FIFO_AC_VI,
520 BRCMF_FWS_FIFO_AC_VO,
521 BRCMF_FWS_FIFO_AC_VO
522 };
523
524 static int fcmode;
525 module_param(fcmode, int, S_IRUSR);
526 MODULE_PARM_DESC(fcmode, "mode of firmware signalled flow control");
527
528 #define BRCMF_FWS_TLV_DEF(name, id, len) \
529 case BRCMF_FWS_TYPE_ ## name: \
530 return len;
531
532 /**
533 * brcmf_fws_get_tlv_len() - returns defined length for given tlv id.
534 *
535 * @fws: firmware-signalling information.
536 * @id: identifier of the TLV.
537 *
538 * Return: the specified length for the given TLV; Otherwise -EINVAL.
539 */
540 static int brcmf_fws_get_tlv_len(struct brcmf_fws_info *fws,
541 enum brcmf_fws_tlv_type id)
542 {
543 switch (id) {
544 BRCMF_FWS_TLV_DEFLIST
545 default:
546 fws->stats.tlv_invalid_type++;
547 break;
548 }
549 return -EINVAL;
550 }
551 #undef BRCMF_FWS_TLV_DEF
552
553 static void brcmf_fws_lock(struct brcmf_fws_info *fws)
554 __acquires(&fws->spinlock)
555 {
556 spin_lock_irqsave(&fws->spinlock, fws->flags);
557 }
558
559 static void brcmf_fws_unlock(struct brcmf_fws_info *fws)
560 __releases(&fws->spinlock)
561 {
562 spin_unlock_irqrestore(&fws->spinlock, fws->flags);
563 }
564
565 static bool brcmf_fws_ifidx_match(struct sk_buff *skb, void *arg)
566 {
567 u32 ifidx = brcmf_skb_if_flags_get_field(skb, INDEX);
568 return ifidx == *(int *)arg;
569 }
570
571 static void brcmf_fws_psq_flush(struct brcmf_fws_info *fws, struct pktq *q,
572 int ifidx)
573 {
574 bool (*matchfn)(struct sk_buff *, void *) = NULL;
575 struct sk_buff *skb;
576 int prec;
577
578 if (ifidx != -1)
579 matchfn = brcmf_fws_ifidx_match;
580 for (prec = 0; prec < q->num_prec; prec++) {
581 skb = brcmu_pktq_pdeq_match(q, prec, matchfn, &ifidx);
582 while (skb) {
583 brcmu_pkt_buf_free_skb(skb);
584 skb = brcmu_pktq_pdeq_match(q, prec, matchfn, &ifidx);
585 }
586 }
587 }
588
589 static void brcmf_fws_hanger_init(struct brcmf_fws_hanger *hanger)
590 {
591 int i;
592
593 memset(hanger, 0, sizeof(*hanger));
594 for (i = 0; i < ARRAY_SIZE(hanger->items); i++)
595 hanger->items[i].state = BRCMF_FWS_HANGER_ITEM_STATE_FREE;
596 }
597
598 static u32 brcmf_fws_hanger_get_free_slot(struct brcmf_fws_hanger *h)
599 {
600 u32 i;
601
602 i = (h->slot_pos + 1) % BRCMF_FWS_HANGER_MAXITEMS;
603
604 while (i != h->slot_pos) {
605 if (h->items[i].state == BRCMF_FWS_HANGER_ITEM_STATE_FREE) {
606 h->slot_pos = i;
607 goto done;
608 }
609 i++;
610 if (i == BRCMF_FWS_HANGER_MAXITEMS)
611 i = 0;
612 }
613 brcmf_err("all slots occupied\n");
614 h->failed_slotfind++;
615 i = BRCMF_FWS_HANGER_MAXITEMS;
616 done:
617 return i;
618 }
619
620 static int brcmf_fws_hanger_pushpkt(struct brcmf_fws_hanger *h,
621 struct sk_buff *pkt, u32 slot_id)
622 {
623 if (slot_id >= BRCMF_FWS_HANGER_MAXITEMS)
624 return -ENOENT;
625
626 if (h->items[slot_id].state != BRCMF_FWS_HANGER_ITEM_STATE_FREE) {
627 brcmf_err("slot is not free\n");
628 h->failed_to_push++;
629 return -EINVAL;
630 }
631
632 h->items[slot_id].state = BRCMF_FWS_HANGER_ITEM_STATE_INUSE;
633 h->items[slot_id].pkt = pkt;
634 h->pushed++;
635 return 0;
636 }
637
638 static int brcmf_fws_hanger_poppkt(struct brcmf_fws_hanger *h,
639 u32 slot_id, struct sk_buff **pktout,
640 bool remove_item)
641 {
642 if (slot_id >= BRCMF_FWS_HANGER_MAXITEMS)
643 return -ENOENT;
644
645 if (h->items[slot_id].state == BRCMF_FWS_HANGER_ITEM_STATE_FREE) {
646 brcmf_err("entry not in use\n");
647 h->failed_to_pop++;
648 return -EINVAL;
649 }
650
651 *pktout = h->items[slot_id].pkt;
652 if (remove_item) {
653 h->items[slot_id].state = BRCMF_FWS_HANGER_ITEM_STATE_FREE;
654 h->items[slot_id].pkt = NULL;
655 h->popped++;
656 }
657 return 0;
658 }
659
660 static int brcmf_fws_hanger_mark_suppressed(struct brcmf_fws_hanger *h,
661 u32 slot_id)
662 {
663 if (slot_id >= BRCMF_FWS_HANGER_MAXITEMS)
664 return -ENOENT;
665
666 if (h->items[slot_id].state == BRCMF_FWS_HANGER_ITEM_STATE_FREE) {
667 brcmf_err("entry not in use\n");
668 return -EINVAL;
669 }
670
671 h->items[slot_id].state = BRCMF_FWS_HANGER_ITEM_STATE_INUSE_SUPPRESSED;
672 return 0;
673 }
674
675 static void brcmf_fws_hanger_cleanup(struct brcmf_fws_info *fws,
676 bool (*fn)(struct sk_buff *, void *),
677 int ifidx)
678 {
679 struct brcmf_fws_hanger *h = &fws->hanger;
680 struct sk_buff *skb;
681 int i;
682 enum brcmf_fws_hanger_item_state s;
683
684 for (i = 0; i < ARRAY_SIZE(h->items); i++) {
685 s = h->items[i].state;
686 if (s == BRCMF_FWS_HANGER_ITEM_STATE_INUSE ||
687 s == BRCMF_FWS_HANGER_ITEM_STATE_INUSE_SUPPRESSED) {
688 skb = h->items[i].pkt;
689 if (fn == NULL || fn(skb, &ifidx)) {
690 /* suppress packets freed from psq */
691 if (s == BRCMF_FWS_HANGER_ITEM_STATE_INUSE)
692 brcmu_pkt_buf_free_skb(skb);
693 h->items[i].state =
694 BRCMF_FWS_HANGER_ITEM_STATE_FREE;
695 }
696 }
697 }
698 }
699
700 static void brcmf_fws_macdesc_set_name(struct brcmf_fws_info *fws,
701 struct brcmf_fws_mac_descriptor *desc)
702 {
703 if (desc == &fws->desc.other)
704 strlcpy(desc->name, "MAC-OTHER", sizeof(desc->name));
705 else if (desc->mac_handle)
706 scnprintf(desc->name, sizeof(desc->name), "MAC-%d:%d",
707 desc->mac_handle, desc->interface_id);
708 else
709 scnprintf(desc->name, sizeof(desc->name), "MACIF:%d",
710 desc->interface_id);
711 }
712
713 static void brcmf_fws_macdesc_init(struct brcmf_fws_mac_descriptor *desc,
714 u8 *addr, u8 ifidx)
715 {
716 brcmf_dbg(TRACE,
717 "enter: desc %p ea=%pM, ifidx=%u\n", desc, addr, ifidx);
718 desc->occupied = 1;
719 desc->state = BRCMF_FWS_STATE_OPEN;
720 desc->requested_credit = 0;
721 desc->requested_packet = 0;
722 /* depending on use may need ifp->bssidx instead */
723 desc->interface_id = ifidx;
724 desc->ac_bitmap = 0xff; /* update this when handling APSD */
725 if (addr)
726 memcpy(&desc->ea[0], addr, ETH_ALEN);
727 }
728
729 static
730 void brcmf_fws_macdesc_deinit(struct brcmf_fws_mac_descriptor *desc)
731 {
732 brcmf_dbg(TRACE,
733 "enter: ea=%pM, ifidx=%u\n", desc->ea, desc->interface_id);
734 desc->occupied = 0;
735 desc->state = BRCMF_FWS_STATE_CLOSE;
736 desc->requested_credit = 0;
737 desc->requested_packet = 0;
738 }
739
740 static struct brcmf_fws_mac_descriptor *
741 brcmf_fws_macdesc_lookup(struct brcmf_fws_info *fws, u8 *ea)
742 {
743 struct brcmf_fws_mac_descriptor *entry;
744 int i;
745
746 if (ea == NULL)
747 return ERR_PTR(-EINVAL);
748
749 entry = &fws->desc.nodes[0];
750 for (i = 0; i < ARRAY_SIZE(fws->desc.nodes); i++) {
751 if (entry->occupied && !memcmp(entry->ea, ea, ETH_ALEN))
752 return entry;
753 entry++;
754 }
755
756 return ERR_PTR(-ENOENT);
757 }
758
759 static struct brcmf_fws_mac_descriptor*
760 brcmf_fws_macdesc_find(struct brcmf_fws_info *fws, struct brcmf_if *ifp, u8 *da)
761 {
762 struct brcmf_fws_mac_descriptor *entry = &fws->desc.other;
763 bool multicast;
764
765 multicast = is_multicast_ether_addr(da);
766
767 /* Multicast destination, STA and P2P clients get the interface entry.
768 * STA/GC gets the Mac Entry for TDLS destinations, TDLS destinations
769 * have their own entry.
770 */
771 if (multicast && ifp->fws_desc) {
772 entry = ifp->fws_desc;
773 goto done;
774 }
775
776 entry = brcmf_fws_macdesc_lookup(fws, da);
777 if (IS_ERR(entry))
778 entry = ifp->fws_desc;
779
780 done:
781 return entry;
782 }
783
784 static bool brcmf_fws_macdesc_closed(struct brcmf_fws_info *fws,
785 struct brcmf_fws_mac_descriptor *entry,
786 int fifo)
787 {
788 struct brcmf_fws_mac_descriptor *if_entry;
789 bool closed;
790
791 /* for unique destination entries the related interface
792 * may be closed.
793 */
794 if (entry->mac_handle) {
795 if_entry = &fws->desc.iface[entry->interface_id];
796 if (if_entry->state == BRCMF_FWS_STATE_CLOSE)
797 return true;
798 }
799 /* an entry is closed when the state is closed and
800 * the firmware did not request anything.
801 */
802 closed = entry->state == BRCMF_FWS_STATE_CLOSE &&
803 !entry->requested_credit && !entry->requested_packet;
804
805 /* Or firmware does not allow traffic for given fifo */
806 return closed || !(entry->ac_bitmap & BIT(fifo));
807 }
808
809 static void brcmf_fws_macdesc_cleanup(struct brcmf_fws_info *fws,
810 struct brcmf_fws_mac_descriptor *entry,
811 int ifidx)
812 {
813 if (entry->occupied && (ifidx == -1 || ifidx == entry->interface_id)) {
814 brcmf_fws_psq_flush(fws, &entry->psq, ifidx);
815 entry->occupied = !!(entry->psq.len);
816 }
817 }
818
819 static void brcmf_fws_bus_txq_cleanup(struct brcmf_fws_info *fws,
820 bool (*fn)(struct sk_buff *, void *),
821 int ifidx)
822 {
823 struct brcmf_fws_hanger_item *hi;
824 struct pktq *txq;
825 struct sk_buff *skb;
826 int prec;
827 u32 hslot;
828
829 txq = brcmf_bus_gettxq(fws->drvr->bus_if);
830 if (IS_ERR(txq)) {
831 brcmf_dbg(TRACE, "no txq to clean up\n");
832 return;
833 }
834
835 for (prec = 0; prec < txq->num_prec; prec++) {
836 skb = brcmu_pktq_pdeq_match(txq, prec, fn, &ifidx);
837 while (skb) {
838 hslot = brcmf_skb_htod_tag_get_field(skb, HSLOT);
839 hi = &fws->hanger.items[hslot];
840 WARN_ON(skb != hi->pkt);
841 hi->state = BRCMF_FWS_HANGER_ITEM_STATE_FREE;
842 brcmu_pkt_buf_free_skb(skb);
843 skb = brcmu_pktq_pdeq_match(txq, prec, fn, &ifidx);
844 }
845 }
846 }
847
848 static void brcmf_fws_cleanup(struct brcmf_fws_info *fws, int ifidx)
849 {
850 int i;
851 struct brcmf_fws_mac_descriptor *table;
852 bool (*matchfn)(struct sk_buff *, void *) = NULL;
853
854 if (fws == NULL)
855 return;
856
857 if (ifidx != -1)
858 matchfn = brcmf_fws_ifidx_match;
859
860 /* cleanup individual nodes */
861 table = &fws->desc.nodes[0];
862 for (i = 0; i < ARRAY_SIZE(fws->desc.nodes); i++)
863 brcmf_fws_macdesc_cleanup(fws, &table[i], ifidx);
864
865 brcmf_fws_macdesc_cleanup(fws, &fws->desc.other, ifidx);
866 brcmf_fws_bus_txq_cleanup(fws, matchfn, ifidx);
867 brcmf_fws_hanger_cleanup(fws, matchfn, ifidx);
868 }
869
870 static u8 brcmf_fws_hdrpush(struct brcmf_fws_info *fws, struct sk_buff *skb)
871 {
872 struct brcmf_fws_mac_descriptor *entry = brcmf_skbcb(skb)->mac;
873 u8 *wlh;
874 u16 data_offset = 0;
875 u8 fillers;
876 __le32 pkttag = cpu_to_le32(brcmf_skbcb(skb)->htod);
877 __le16 pktseq = cpu_to_le16(brcmf_skbcb(skb)->htod_seq);
878
879 brcmf_dbg(TRACE, "enter: %s, idx=%d hslot=%d htod %X seq %X\n",
880 entry->name, brcmf_skb_if_flags_get_field(skb, INDEX),
881 (le32_to_cpu(pkttag) >> 8) & 0xffff,
882 brcmf_skbcb(skb)->htod, brcmf_skbcb(skb)->htod_seq);
883 if (entry->send_tim_signal)
884 data_offset += 2 + BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP_LEN;
885 if (BRCMF_FWS_MODE_GET_REUSESEQ(fws->mode))
886 data_offset += BRCMF_FWS_TYPE_SEQ_LEN;
887 /* +2 is for Type[1] and Len[1] in TLV, plus TIM signal */
888 data_offset += 2 + BRCMF_FWS_TYPE_PKTTAG_LEN;
889 fillers = round_up(data_offset, 4) - data_offset;
890 data_offset += fillers;
891
892 skb_push(skb, data_offset);
893 wlh = skb->data;
894
895 wlh[0] = BRCMF_FWS_TYPE_PKTTAG;
896 wlh[1] = BRCMF_FWS_TYPE_PKTTAG_LEN;
897 memcpy(&wlh[2], &pkttag, sizeof(pkttag));
898 if (BRCMF_FWS_MODE_GET_REUSESEQ(fws->mode)) {
899 wlh[1] += BRCMF_FWS_TYPE_SEQ_LEN;
900 memcpy(&wlh[2 + BRCMF_FWS_TYPE_PKTTAG_LEN], &pktseq,
901 sizeof(pktseq));
902 }
903 wlh += wlh[1] + 2;
904
905 if (entry->send_tim_signal) {
906 entry->send_tim_signal = 0;
907 wlh[0] = BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP;
908 wlh[1] = BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP_LEN;
909 wlh[2] = entry->mac_handle;
910 wlh[3] = entry->traffic_pending_bmp;
911 brcmf_dbg(TRACE, "adding TIM info: handle %d bmp 0x%X\n",
912 entry->mac_handle, entry->traffic_pending_bmp);
913 wlh += BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP_LEN + 2;
914 entry->traffic_lastreported_bmp = entry->traffic_pending_bmp;
915 }
916 if (fillers)
917 memset(wlh, BRCMF_FWS_TYPE_FILLER, fillers);
918
919 return (u8)(data_offset >> 2);
920 }
921
922 static bool brcmf_fws_tim_update(struct brcmf_fws_info *fws,
923 struct brcmf_fws_mac_descriptor *entry,
924 int fifo, bool send_immediately)
925 {
926 struct sk_buff *skb;
927 struct brcmf_skbuff_cb *skcb;
928 s32 err;
929 u32 len;
930 u8 data_offset;
931 int ifidx;
932
933 /* check delayedQ and suppressQ in one call using bitmap */
934 if (brcmu_pktq_mlen(&entry->psq, 3 << (fifo * 2)) == 0)
935 entry->traffic_pending_bmp &= ~NBITVAL(fifo);
936 else
937 entry->traffic_pending_bmp |= NBITVAL(fifo);
938
939 entry->send_tim_signal = false;
940 if (entry->traffic_lastreported_bmp != entry->traffic_pending_bmp)
941 entry->send_tim_signal = true;
942 if (send_immediately && entry->send_tim_signal &&
943 entry->state == BRCMF_FWS_STATE_CLOSE) {
944 /* create a dummy packet and sent that. The traffic */
945 /* bitmap info will automatically be attached to that packet */
946 len = BRCMF_FWS_TYPE_PKTTAG_LEN + 2 +
947 BRCMF_FWS_TYPE_SEQ_LEN +
948 BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP_LEN + 2 +
949 4 + fws->drvr->hdrlen;
950 skb = brcmu_pkt_buf_get_skb(len);
951 if (skb == NULL)
952 return false;
953 skb_pull(skb, len);
954 skcb = brcmf_skbcb(skb);
955 skcb->mac = entry;
956 skcb->state = BRCMF_FWS_SKBSTATE_TIM;
957 skcb->htod = 0;
958 skcb->htod_seq = 0;
959 data_offset = brcmf_fws_hdrpush(fws, skb);
960 ifidx = brcmf_skb_if_flags_get_field(skb, INDEX);
961 brcmf_fws_unlock(fws);
962 err = brcmf_proto_txdata(fws->drvr, ifidx, data_offset, skb);
963 brcmf_fws_lock(fws);
964 if (err)
965 brcmu_pkt_buf_free_skb(skb);
966 return true;
967 }
968 return false;
969 }
970
971 static void
972 brcmf_fws_flow_control_check(struct brcmf_fws_info *fws, struct pktq *pq,
973 u8 if_id)
974 {
975 struct brcmf_if *ifp = fws->drvr->iflist[!if_id ? 0 : if_id + 1];
976
977 if (WARN_ON(!ifp))
978 return;
979
980 if ((ifp->netif_stop & BRCMF_NETIF_STOP_REASON_FWS_FC) &&
981 pq->len <= BRCMF_FWS_FLOWCONTROL_LOWATER)
982 brcmf_txflowblock_if(ifp,
983 BRCMF_NETIF_STOP_REASON_FWS_FC, false);
984 if (!(ifp->netif_stop & BRCMF_NETIF_STOP_REASON_FWS_FC) &&
985 pq->len >= BRCMF_FWS_FLOWCONTROL_HIWATER) {
986 fws->stats.fws_flow_block++;
987 brcmf_txflowblock_if(ifp, BRCMF_NETIF_STOP_REASON_FWS_FC, true);
988 }
989 return;
990 }
991
992 static int brcmf_fws_rssi_indicate(struct brcmf_fws_info *fws, s8 rssi)
993 {
994 brcmf_dbg(CTL, "rssi %d\n", rssi);
995 return 0;
996 }
997
998 static
999 int brcmf_fws_macdesc_indicate(struct brcmf_fws_info *fws, u8 type, u8 *data)
1000 {
1001 struct brcmf_fws_mac_descriptor *entry, *existing;
1002 u8 mac_handle;
1003 u8 ifidx;
1004 u8 *addr;
1005
1006 mac_handle = *data++;
1007 ifidx = *data++;
1008 addr = data;
1009
1010 entry = &fws->desc.nodes[mac_handle & 0x1F];
1011 if (type == BRCMF_FWS_TYPE_MACDESC_DEL) {
1012 if (entry->occupied) {
1013 brcmf_dbg(TRACE, "deleting %s mac %pM\n",
1014 entry->name, addr);
1015 brcmf_fws_lock(fws);
1016 brcmf_fws_macdesc_cleanup(fws, entry, -1);
1017 brcmf_fws_macdesc_deinit(entry);
1018 brcmf_fws_unlock(fws);
1019 } else
1020 fws->stats.mac_update_failed++;
1021 return 0;
1022 }
1023
1024 existing = brcmf_fws_macdesc_lookup(fws, addr);
1025 if (IS_ERR(existing)) {
1026 if (!entry->occupied) {
1027 brcmf_fws_lock(fws);
1028 entry->mac_handle = mac_handle;
1029 brcmf_fws_macdesc_init(entry, addr, ifidx);
1030 brcmf_fws_macdesc_set_name(fws, entry);
1031 brcmu_pktq_init(&entry->psq, BRCMF_FWS_PSQ_PREC_COUNT,
1032 BRCMF_FWS_PSQ_LEN);
1033 brcmf_fws_unlock(fws);
1034 brcmf_dbg(TRACE, "add %s mac %pM\n", entry->name, addr);
1035 } else {
1036 fws->stats.mac_update_failed++;
1037 }
1038 } else {
1039 if (entry != existing) {
1040 brcmf_dbg(TRACE, "copy mac %s\n", existing->name);
1041 brcmf_fws_lock(fws);
1042 memcpy(entry, existing,
1043 offsetof(struct brcmf_fws_mac_descriptor, psq));
1044 entry->mac_handle = mac_handle;
1045 brcmf_fws_macdesc_deinit(existing);
1046 brcmf_fws_macdesc_set_name(fws, entry);
1047 brcmf_fws_unlock(fws);
1048 brcmf_dbg(TRACE, "relocate %s mac %pM\n", entry->name,
1049 addr);
1050 } else {
1051 brcmf_dbg(TRACE, "use existing\n");
1052 WARN_ON(entry->mac_handle != mac_handle);
1053 /* TODO: what should we do here: continue, reinit, .. */
1054 }
1055 }
1056 return 0;
1057 }
1058
1059 static int brcmf_fws_macdesc_state_indicate(struct brcmf_fws_info *fws,
1060 u8 type, u8 *data)
1061 {
1062 struct brcmf_fws_mac_descriptor *entry;
1063 u8 mac_handle;
1064 int ret;
1065
1066 mac_handle = data[0];
1067 entry = &fws->desc.nodes[mac_handle & 0x1F];
1068 if (!entry->occupied) {
1069 fws->stats.mac_ps_update_failed++;
1070 return -ESRCH;
1071 }
1072 brcmf_fws_lock(fws);
1073 /* a state update should wipe old credits */
1074 entry->requested_credit = 0;
1075 entry->requested_packet = 0;
1076 if (type == BRCMF_FWS_TYPE_MAC_OPEN) {
1077 entry->state = BRCMF_FWS_STATE_OPEN;
1078 ret = BRCMF_FWS_RET_OK_SCHEDULE;
1079 } else {
1080 entry->state = BRCMF_FWS_STATE_CLOSE;
1081 brcmf_fws_tim_update(fws, entry, BRCMF_FWS_FIFO_AC_BK, false);
1082 brcmf_fws_tim_update(fws, entry, BRCMF_FWS_FIFO_AC_BE, false);
1083 brcmf_fws_tim_update(fws, entry, BRCMF_FWS_FIFO_AC_VI, false);
1084 brcmf_fws_tim_update(fws, entry, BRCMF_FWS_FIFO_AC_VO, true);
1085 ret = BRCMF_FWS_RET_OK_NOSCHEDULE;
1086 }
1087 brcmf_fws_unlock(fws);
1088 return ret;
1089 }
1090
1091 static int brcmf_fws_interface_state_indicate(struct brcmf_fws_info *fws,
1092 u8 type, u8 *data)
1093 {
1094 struct brcmf_fws_mac_descriptor *entry;
1095 u8 ifidx;
1096 int ret;
1097
1098 ifidx = data[0];
1099
1100 if (ifidx >= BRCMF_MAX_IFS) {
1101 ret = -ERANGE;
1102 goto fail;
1103 }
1104
1105 entry = &fws->desc.iface[ifidx];
1106 if (!entry->occupied) {
1107 ret = -ESRCH;
1108 goto fail;
1109 }
1110
1111 brcmf_dbg(TRACE, "%s (%d): %s\n", brcmf_fws_get_tlv_name(type), type,
1112 entry->name);
1113 brcmf_fws_lock(fws);
1114 switch (type) {
1115 case BRCMF_FWS_TYPE_INTERFACE_OPEN:
1116 entry->state = BRCMF_FWS_STATE_OPEN;
1117 ret = BRCMF_FWS_RET_OK_SCHEDULE;
1118 break;
1119 case BRCMF_FWS_TYPE_INTERFACE_CLOSE:
1120 entry->state = BRCMF_FWS_STATE_CLOSE;
1121 ret = BRCMF_FWS_RET_OK_NOSCHEDULE;
1122 break;
1123 default:
1124 ret = -EINVAL;
1125 brcmf_fws_unlock(fws);
1126 goto fail;
1127 }
1128 brcmf_fws_unlock(fws);
1129 return ret;
1130
1131 fail:
1132 fws->stats.if_update_failed++;
1133 return ret;
1134 }
1135
1136 static int brcmf_fws_request_indicate(struct brcmf_fws_info *fws, u8 type,
1137 u8 *data)
1138 {
1139 struct brcmf_fws_mac_descriptor *entry;
1140
1141 entry = &fws->desc.nodes[data[1] & 0x1F];
1142 if (!entry->occupied) {
1143 if (type == BRCMF_FWS_TYPE_MAC_REQUEST_CREDIT)
1144 fws->stats.credit_request_failed++;
1145 else
1146 fws->stats.packet_request_failed++;
1147 return -ESRCH;
1148 }
1149
1150 brcmf_dbg(TRACE, "%s (%d): %s cnt %d bmp %d\n",
1151 brcmf_fws_get_tlv_name(type), type, entry->name,
1152 data[0], data[2]);
1153 brcmf_fws_lock(fws);
1154 if (type == BRCMF_FWS_TYPE_MAC_REQUEST_CREDIT)
1155 entry->requested_credit = data[0];
1156 else
1157 entry->requested_packet = data[0];
1158
1159 entry->ac_bitmap = data[2];
1160 brcmf_fws_unlock(fws);
1161 return BRCMF_FWS_RET_OK_SCHEDULE;
1162 }
1163
1164 static void
1165 brcmf_fws_macdesc_use_req_credit(struct brcmf_fws_mac_descriptor *entry,
1166 struct sk_buff *skb)
1167 {
1168 if (entry->requested_credit > 0) {
1169 entry->requested_credit--;
1170 brcmf_skb_if_flags_set_field(skb, REQUESTED, 1);
1171 brcmf_skb_if_flags_set_field(skb, REQ_CREDIT, 1);
1172 if (entry->state != BRCMF_FWS_STATE_CLOSE)
1173 brcmf_err("requested credit set while mac not closed!\n");
1174 } else if (entry->requested_packet > 0) {
1175 entry->requested_packet--;
1176 brcmf_skb_if_flags_set_field(skb, REQUESTED, 1);
1177 brcmf_skb_if_flags_set_field(skb, REQ_CREDIT, 0);
1178 if (entry->state != BRCMF_FWS_STATE_CLOSE)
1179 brcmf_err("requested packet set while mac not closed!\n");
1180 } else {
1181 brcmf_skb_if_flags_set_field(skb, REQUESTED, 0);
1182 brcmf_skb_if_flags_set_field(skb, REQ_CREDIT, 0);
1183 }
1184 }
1185
1186 static void brcmf_fws_macdesc_return_req_credit(struct sk_buff *skb)
1187 {
1188 struct brcmf_fws_mac_descriptor *entry = brcmf_skbcb(skb)->mac;
1189
1190 if ((brcmf_skb_if_flags_get_field(skb, REQ_CREDIT)) &&
1191 (entry->state == BRCMF_FWS_STATE_CLOSE))
1192 entry->requested_credit++;
1193 }
1194
1195 static void brcmf_fws_return_credits(struct brcmf_fws_info *fws,
1196 u8 fifo, u8 credits)
1197 {
1198 int lender_ac;
1199 int *borrowed;
1200 int *fifo_credit;
1201
1202 if (!credits)
1203 return;
1204
1205 fws->fifo_credit_map |= 1 << fifo;
1206
1207 if ((fifo == BRCMF_FWS_FIFO_AC_BE) &&
1208 (fws->credits_borrowed[0])) {
1209 for (lender_ac = BRCMF_FWS_FIFO_AC_VO; lender_ac >= 0;
1210 lender_ac--) {
1211 borrowed = &fws->credits_borrowed[lender_ac];
1212 if (*borrowed) {
1213 fws->fifo_credit_map |= (1 << lender_ac);
1214 fifo_credit = &fws->fifo_credit[lender_ac];
1215 if (*borrowed >= credits) {
1216 *borrowed -= credits;
1217 *fifo_credit += credits;
1218 return;
1219 } else {
1220 credits -= *borrowed;
1221 *fifo_credit += *borrowed;
1222 *borrowed = 0;
1223 }
1224 }
1225 }
1226 }
1227
1228 fws->fifo_credit[fifo] += credits;
1229 }
1230
1231 static void brcmf_fws_schedule_deq(struct brcmf_fws_info *fws)
1232 {
1233 /* only schedule dequeue when there are credits for delayed traffic */
1234 if ((fws->fifo_credit_map & fws->fifo_delay_map) ||
1235 (!brcmf_fws_fc_active(fws) && fws->fifo_delay_map))
1236 queue_work(fws->fws_wq, &fws->fws_dequeue_work);
1237 }
1238
1239 static int brcmf_fws_enq(struct brcmf_fws_info *fws,
1240 enum brcmf_fws_skb_state state, int fifo,
1241 struct sk_buff *p)
1242 {
1243 int prec = 2 * fifo;
1244 u32 *qfull_stat = &fws->stats.delayq_full_error;
1245 struct brcmf_fws_mac_descriptor *entry;
1246 struct pktq *pq;
1247 struct sk_buff_head *queue;
1248 struct sk_buff *p_head;
1249 struct sk_buff *p_tail;
1250 u32 fr_new;
1251 u32 fr_compare;
1252
1253 entry = brcmf_skbcb(p)->mac;
1254 if (entry == NULL) {
1255 brcmf_err("no mac descriptor found for skb %p\n", p);
1256 return -ENOENT;
1257 }
1258
1259 brcmf_dbg(DATA, "enter: fifo %d skb %p\n", fifo, p);
1260 if (state == BRCMF_FWS_SKBSTATE_SUPPRESSED) {
1261 prec += 1;
1262 qfull_stat = &fws->stats.supprq_full_error;
1263
1264 /* Fix out of order delivery of frames. Dont assume frame */
1265 /* can be inserted at the end, but look for correct position */
1266 pq = &entry->psq;
1267 if (pktq_full(pq) || pktq_pfull(pq, prec)) {
1268 *qfull_stat += 1;
1269 return -ENFILE;
1270 }
1271 queue = &pq->q[prec].skblist;
1272
1273 p_head = skb_peek(queue);
1274 p_tail = skb_peek_tail(queue);
1275 fr_new = brcmf_skb_htod_tag_get_field(p, FREERUN);
1276
1277 while (p_head != p_tail) {
1278 fr_compare = brcmf_skb_htod_tag_get_field(p_tail,
1279 FREERUN);
1280 /* be sure to handle wrap of 256 */
1281 if (((fr_new > fr_compare) &&
1282 ((fr_new - fr_compare) < 128)) ||
1283 ((fr_new < fr_compare) &&
1284 ((fr_compare - fr_new) > 128)))
1285 break;
1286 p_tail = skb_queue_prev(queue, p_tail);
1287 }
1288 /* Position found. Determine what to do */
1289 if (p_tail == NULL) {
1290 /* empty list */
1291 __skb_queue_tail(queue, p);
1292 } else {
1293 fr_compare = brcmf_skb_htod_tag_get_field(p_tail,
1294 FREERUN);
1295 if (((fr_new > fr_compare) &&
1296 ((fr_new - fr_compare) < 128)) ||
1297 ((fr_new < fr_compare) &&
1298 ((fr_compare - fr_new) > 128))) {
1299 /* After tail */
1300 __skb_queue_after(queue, p_tail, p);
1301 } else {
1302 /* Before tail */
1303 __skb_insert(p, p_tail->prev, p_tail, queue);
1304 }
1305 }
1306
1307 /* Complete the counters and statistics */
1308 pq->len++;
1309 if (pq->hi_prec < prec)
1310 pq->hi_prec = (u8) prec;
1311 } else if (brcmu_pktq_penq(&entry->psq, prec, p) == NULL) {
1312 *qfull_stat += 1;
1313 return -ENFILE;
1314 }
1315
1316 /* increment total enqueued packet count */
1317 fws->fifo_delay_map |= 1 << fifo;
1318 fws->fifo_enqpkt[fifo]++;
1319
1320 /* update the sk_buff state */
1321 brcmf_skbcb(p)->state = state;
1322
1323 /*
1324 * A packet has been pushed so update traffic
1325 * availability bitmap, if applicable
1326 */
1327 brcmf_fws_tim_update(fws, entry, fifo, true);
1328 brcmf_fws_flow_control_check(fws, &entry->psq,
1329 brcmf_skb_if_flags_get_field(p, INDEX));
1330 return 0;
1331 }
1332
1333 static struct sk_buff *brcmf_fws_deq(struct brcmf_fws_info *fws, int fifo)
1334 {
1335 struct brcmf_fws_mac_descriptor *table;
1336 struct brcmf_fws_mac_descriptor *entry;
1337 struct sk_buff *p;
1338 int num_nodes;
1339 int node_pos;
1340 int prec_out;
1341 int pmsk;
1342 int i;
1343
1344 table = (struct brcmf_fws_mac_descriptor *)&fws->desc;
1345 num_nodes = sizeof(fws->desc) / sizeof(struct brcmf_fws_mac_descriptor);
1346 node_pos = fws->deq_node_pos[fifo];
1347
1348 for (i = 0; i < num_nodes; i++) {
1349 entry = &table[(node_pos + i) % num_nodes];
1350 if (!entry->occupied ||
1351 brcmf_fws_macdesc_closed(fws, entry, fifo))
1352 continue;
1353
1354 if (entry->suppressed)
1355 pmsk = 2;
1356 else
1357 pmsk = 3;
1358 p = brcmu_pktq_mdeq(&entry->psq, pmsk << (fifo * 2), &prec_out);
1359 if (p == NULL) {
1360 if (entry->suppressed) {
1361 if (entry->suppr_transit_count)
1362 continue;
1363 entry->suppressed = false;
1364 p = brcmu_pktq_mdeq(&entry->psq,
1365 1 << (fifo * 2), &prec_out);
1366 }
1367 }
1368 if (p == NULL)
1369 continue;
1370
1371 brcmf_fws_macdesc_use_req_credit(entry, p);
1372
1373 /* move dequeue position to ensure fair round-robin */
1374 fws->deq_node_pos[fifo] = (node_pos + i + 1) % num_nodes;
1375 brcmf_fws_flow_control_check(fws, &entry->psq,
1376 brcmf_skb_if_flags_get_field(p,
1377 INDEX)
1378 );
1379 /*
1380 * A packet has been picked up, update traffic
1381 * availability bitmap, if applicable
1382 */
1383 brcmf_fws_tim_update(fws, entry, fifo, false);
1384
1385 /*
1386 * decrement total enqueued fifo packets and
1387 * clear delay bitmap if done.
1388 */
1389 fws->fifo_enqpkt[fifo]--;
1390 if (fws->fifo_enqpkt[fifo] == 0)
1391 fws->fifo_delay_map &= ~(1 << fifo);
1392 goto done;
1393 }
1394 p = NULL;
1395 done:
1396 brcmf_dbg(DATA, "exit: fifo %d skb %p\n", fifo, p);
1397 return p;
1398 }
1399
1400 static int brcmf_fws_txstatus_suppressed(struct brcmf_fws_info *fws, int fifo,
1401 struct sk_buff *skb, u8 ifidx,
1402 u32 genbit, u16 seq)
1403 {
1404 struct brcmf_fws_mac_descriptor *entry = brcmf_skbcb(skb)->mac;
1405 u32 hslot;
1406 int ret;
1407
1408 hslot = brcmf_skb_htod_tag_get_field(skb, HSLOT);
1409
1410 /* this packet was suppressed */
1411 if (!entry->suppressed) {
1412 entry->suppressed = true;
1413 entry->suppr_transit_count = entry->transit_count;
1414 brcmf_dbg(DATA, "suppress %s: transit %d\n",
1415 entry->name, entry->transit_count);
1416 }
1417
1418 entry->generation = genbit;
1419
1420 brcmf_skb_htod_tag_set_field(skb, GENERATION, genbit);
1421 brcmf_skbcb(skb)->htod_seq = seq;
1422 if (brcmf_skb_htod_seq_get_field(skb, FROMFW)) {
1423 brcmf_skb_htod_seq_set_field(skb, FROMDRV, 1);
1424 brcmf_skb_htod_seq_set_field(skb, FROMFW, 0);
1425 } else {
1426 brcmf_skb_htod_seq_set_field(skb, FROMDRV, 0);
1427 }
1428 ret = brcmf_fws_enq(fws, BRCMF_FWS_SKBSTATE_SUPPRESSED, fifo, skb);
1429
1430 if (ret != 0) {
1431 /* suppress q is full drop this packet */
1432 brcmf_fws_hanger_poppkt(&fws->hanger, hslot, &skb, true);
1433 } else {
1434 /* Mark suppressed to avoid a double free during wlfc cleanup */
1435 brcmf_fws_hanger_mark_suppressed(&fws->hanger, hslot);
1436 }
1437
1438 return ret;
1439 }
1440
1441 static int
1442 brcmf_fws_txs_process(struct brcmf_fws_info *fws, u8 flags, u32 hslot,
1443 u32 genbit, u16 seq)
1444 {
1445 u32 fifo;
1446 int ret;
1447 bool remove_from_hanger = true;
1448 struct sk_buff *skb;
1449 struct brcmf_skbuff_cb *skcb;
1450 struct brcmf_fws_mac_descriptor *entry = NULL;
1451 u8 ifidx;
1452
1453 brcmf_dbg(DATA, "flags %d\n", flags);
1454
1455 if (flags == BRCMF_FWS_TXSTATUS_DISCARD)
1456 fws->stats.txs_discard++;
1457 else if (flags == BRCMF_FWS_TXSTATUS_CORE_SUPPRESS) {
1458 fws->stats.txs_supp_core++;
1459 remove_from_hanger = false;
1460 } else if (flags == BRCMF_FWS_TXSTATUS_FW_PS_SUPPRESS) {
1461 fws->stats.txs_supp_ps++;
1462 remove_from_hanger = false;
1463 } else if (flags == BRCMF_FWS_TXSTATUS_FW_TOSSED)
1464 fws->stats.txs_tossed++;
1465 else if (flags == BRCMF_FWS_TXSTATUS_HOST_TOSSED)
1466 fws->stats.txs_host_tossed++;
1467 else
1468 brcmf_err("unexpected txstatus\n");
1469
1470 ret = brcmf_fws_hanger_poppkt(&fws->hanger, hslot, &skb,
1471 remove_from_hanger);
1472 if (ret != 0) {
1473 brcmf_err("no packet in hanger slot: hslot=%d\n", hslot);
1474 return ret;
1475 }
1476
1477 skcb = brcmf_skbcb(skb);
1478 entry = skcb->mac;
1479 if (WARN_ON(!entry)) {
1480 brcmu_pkt_buf_free_skb(skb);
1481 return -EINVAL;
1482 }
1483 entry->transit_count--;
1484 if (entry->suppressed && entry->suppr_transit_count)
1485 entry->suppr_transit_count--;
1486
1487 brcmf_dbg(DATA, "%s flags %d htod %X seq %X\n", entry->name, flags,
1488 skcb->htod, seq);
1489
1490 /* pick up the implicit credit from this packet */
1491 fifo = brcmf_skb_htod_tag_get_field(skb, FIFO);
1492 if ((fws->fcmode == BRCMF_FWS_FCMODE_IMPLIED_CREDIT) ||
1493 (brcmf_skb_if_flags_get_field(skb, REQ_CREDIT)) ||
1494 (flags == BRCMF_FWS_TXSTATUS_HOST_TOSSED)) {
1495 brcmf_fws_return_credits(fws, fifo, 1);
1496 brcmf_fws_schedule_deq(fws);
1497 }
1498 brcmf_fws_macdesc_return_req_credit(skb);
1499
1500 if (brcmf_proto_hdrpull(fws->drvr, false, &ifidx, skb)) {
1501 brcmu_pkt_buf_free_skb(skb);
1502 return -EINVAL;
1503 }
1504 if (!remove_from_hanger)
1505 ret = brcmf_fws_txstatus_suppressed(fws, fifo, skb, ifidx,
1506 genbit, seq);
1507 if (remove_from_hanger || ret)
1508 brcmf_txfinalize(fws->drvr, skb, ifidx, true);
1509
1510 return 0;
1511 }
1512
1513 static int brcmf_fws_fifocreditback_indicate(struct brcmf_fws_info *fws,
1514 u8 *data)
1515 {
1516 int i;
1517
1518 if (fws->fcmode != BRCMF_FWS_FCMODE_EXPLICIT_CREDIT) {
1519 brcmf_dbg(INFO, "ignored\n");
1520 return BRCMF_FWS_RET_OK_NOSCHEDULE;
1521 }
1522
1523 brcmf_dbg(DATA, "enter: data %pM\n", data);
1524 brcmf_fws_lock(fws);
1525 for (i = 0; i < BRCMF_FWS_FIFO_COUNT; i++)
1526 brcmf_fws_return_credits(fws, i, data[i]);
1527
1528 brcmf_dbg(DATA, "map: credit %x delay %x\n", fws->fifo_credit_map,
1529 fws->fifo_delay_map);
1530 brcmf_fws_unlock(fws);
1531 return BRCMF_FWS_RET_OK_SCHEDULE;
1532 }
1533
1534 static int brcmf_fws_txstatus_indicate(struct brcmf_fws_info *fws, u8 *data)
1535 {
1536 __le32 status_le;
1537 __le16 seq_le;
1538 u32 status;
1539 u32 hslot;
1540 u32 genbit;
1541 u8 flags;
1542 u16 seq;
1543
1544 fws->stats.txs_indicate++;
1545 memcpy(&status_le, data, sizeof(status_le));
1546 status = le32_to_cpu(status_le);
1547 flags = brcmf_txstatus_get_field(status, FLAGS);
1548 hslot = brcmf_txstatus_get_field(status, HSLOT);
1549 genbit = brcmf_txstatus_get_field(status, GENERATION);
1550 if (BRCMF_FWS_MODE_GET_REUSESEQ(fws->mode)) {
1551 memcpy(&seq_le, &data[BRCMF_FWS_TYPE_PKTTAG_LEN],
1552 sizeof(seq_le));
1553 seq = le16_to_cpu(seq_le);
1554 } else {
1555 seq = 0;
1556 }
1557
1558 brcmf_fws_lock(fws);
1559 brcmf_fws_txs_process(fws, flags, hslot, genbit, seq);
1560 brcmf_fws_unlock(fws);
1561 return BRCMF_FWS_RET_OK_NOSCHEDULE;
1562 }
1563
1564 static int brcmf_fws_dbg_seqnum_check(struct brcmf_fws_info *fws, u8 *data)
1565 {
1566 __le32 timestamp;
1567
1568 memcpy(&timestamp, &data[2], sizeof(timestamp));
1569 brcmf_dbg(CTL, "received: seq %d, timestamp %d\n", data[1],
1570 le32_to_cpu(timestamp));
1571 return 0;
1572 }
1573
1574 static int brcmf_fws_notify_credit_map(struct brcmf_if *ifp,
1575 const struct brcmf_event_msg *e,
1576 void *data)
1577 {
1578 struct brcmf_fws_info *fws = ifp->drvr->fws;
1579 int i;
1580 u8 *credits = data;
1581
1582 if (e->datalen < BRCMF_FWS_FIFO_COUNT) {
1583 brcmf_err("event payload too small (%d)\n", e->datalen);
1584 return -EINVAL;
1585 }
1586 if (fws->creditmap_received)
1587 return 0;
1588
1589 fws->creditmap_received = true;
1590
1591 brcmf_dbg(TRACE, "enter: credits %pM\n", credits);
1592 brcmf_fws_lock(fws);
1593 for (i = 0; i < ARRAY_SIZE(fws->fifo_credit); i++) {
1594 if (*credits)
1595 fws->fifo_credit_map |= 1 << i;
1596 else
1597 fws->fifo_credit_map &= ~(1 << i);
1598 fws->fifo_credit[i] = *credits++;
1599 }
1600 brcmf_fws_schedule_deq(fws);
1601 brcmf_fws_unlock(fws);
1602 return 0;
1603 }
1604
1605 static int brcmf_fws_notify_bcmc_credit_support(struct brcmf_if *ifp,
1606 const struct brcmf_event_msg *e,
1607 void *data)
1608 {
1609 struct brcmf_fws_info *fws = ifp->drvr->fws;
1610
1611 brcmf_fws_lock(fws);
1612 if (fws)
1613 fws->bcmc_credit_check = true;
1614 brcmf_fws_unlock(fws);
1615 return 0;
1616 }
1617
1618 int brcmf_fws_hdrpull(struct brcmf_pub *drvr, int ifidx, s16 signal_len,
1619 struct sk_buff *skb)
1620 {
1621 struct brcmf_skb_reorder_data *rd;
1622 struct brcmf_fws_info *fws = drvr->fws;
1623 u8 *signal_data;
1624 s16 data_len;
1625 u8 type;
1626 u8 len;
1627 u8 *data;
1628 s32 status;
1629 s32 err;
1630
1631 brcmf_dbg(HDRS, "enter: ifidx %d, skblen %u, sig %d\n",
1632 ifidx, skb->len, signal_len);
1633
1634 WARN_ON(signal_len > skb->len);
1635
1636 if (!signal_len)
1637 return 0;
1638 /* if flow control disabled, skip to packet data and leave */
1639 if ((!fws) || (!fws->fw_signals)) {
1640 skb_pull(skb, signal_len);
1641 return 0;
1642 }
1643
1644 fws->stats.header_pulls++;
1645 data_len = signal_len;
1646 signal_data = skb->data;
1647
1648 status = BRCMF_FWS_RET_OK_NOSCHEDULE;
1649 while (data_len > 0) {
1650 /* extract tlv info */
1651 type = signal_data[0];
1652
1653 /* FILLER type is actually not a TLV, but
1654 * a single byte that can be skipped.
1655 */
1656 if (type == BRCMF_FWS_TYPE_FILLER) {
1657 signal_data += 1;
1658 data_len -= 1;
1659 continue;
1660 }
1661 len = signal_data[1];
1662 data = signal_data + 2;
1663
1664 brcmf_dbg(HDRS, "tlv type=%s (%d), len=%d (%d)\n",
1665 brcmf_fws_get_tlv_name(type), type, len,
1666 brcmf_fws_get_tlv_len(fws, type));
1667
1668 /* abort parsing when length invalid */
1669 if (data_len < len + 2)
1670 break;
1671
1672 if (len < brcmf_fws_get_tlv_len(fws, type))
1673 break;
1674
1675 err = BRCMF_FWS_RET_OK_NOSCHEDULE;
1676 switch (type) {
1677 case BRCMF_FWS_TYPE_COMP_TXSTATUS:
1678 break;
1679 case BRCMF_FWS_TYPE_HOST_REORDER_RXPKTS:
1680 rd = (struct brcmf_skb_reorder_data *)skb->cb;
1681 rd->reorder = data;
1682 break;
1683 case BRCMF_FWS_TYPE_MACDESC_ADD:
1684 case BRCMF_FWS_TYPE_MACDESC_DEL:
1685 brcmf_fws_macdesc_indicate(fws, type, data);
1686 break;
1687 case BRCMF_FWS_TYPE_MAC_OPEN:
1688 case BRCMF_FWS_TYPE_MAC_CLOSE:
1689 err = brcmf_fws_macdesc_state_indicate(fws, type, data);
1690 break;
1691 case BRCMF_FWS_TYPE_INTERFACE_OPEN:
1692 case BRCMF_FWS_TYPE_INTERFACE_CLOSE:
1693 err = brcmf_fws_interface_state_indicate(fws, type,
1694 data);
1695 break;
1696 case BRCMF_FWS_TYPE_MAC_REQUEST_CREDIT:
1697 case BRCMF_FWS_TYPE_MAC_REQUEST_PACKET:
1698 err = brcmf_fws_request_indicate(fws, type, data);
1699 break;
1700 case BRCMF_FWS_TYPE_TXSTATUS:
1701 brcmf_fws_txstatus_indicate(fws, data);
1702 break;
1703 case BRCMF_FWS_TYPE_FIFO_CREDITBACK:
1704 err = brcmf_fws_fifocreditback_indicate(fws, data);
1705 break;
1706 case BRCMF_FWS_TYPE_RSSI:
1707 brcmf_fws_rssi_indicate(fws, *data);
1708 break;
1709 case BRCMF_FWS_TYPE_TRANS_ID:
1710 brcmf_fws_dbg_seqnum_check(fws, data);
1711 break;
1712 case BRCMF_FWS_TYPE_PKTTAG:
1713 case BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP:
1714 default:
1715 fws->stats.tlv_invalid_type++;
1716 break;
1717 }
1718 if (err == BRCMF_FWS_RET_OK_SCHEDULE)
1719 status = BRCMF_FWS_RET_OK_SCHEDULE;
1720 signal_data += len + 2;
1721 data_len -= len + 2;
1722 }
1723
1724 if (data_len != 0)
1725 fws->stats.tlv_parse_failed++;
1726
1727 if (status == BRCMF_FWS_RET_OK_SCHEDULE)
1728 brcmf_fws_schedule_deq(fws);
1729
1730 /* signalling processing result does
1731 * not affect the actual ethernet packet.
1732 */
1733 skb_pull(skb, signal_len);
1734
1735 /* this may be a signal-only packet
1736 */
1737 if (skb->len == 0)
1738 fws->stats.header_only_pkt++;
1739
1740 return 0;
1741 }
1742
1743 static u8 brcmf_fws_precommit_skb(struct brcmf_fws_info *fws, int fifo,
1744 struct sk_buff *p)
1745 {
1746 struct brcmf_skbuff_cb *skcb = brcmf_skbcb(p);
1747 struct brcmf_fws_mac_descriptor *entry = skcb->mac;
1748 u8 flags;
1749
1750 if (skcb->state != BRCMF_FWS_SKBSTATE_SUPPRESSED)
1751 brcmf_skb_htod_tag_set_field(p, GENERATION, entry->generation);
1752 flags = BRCMF_FWS_HTOD_FLAG_PKTFROMHOST;
1753 if (brcmf_skb_if_flags_get_field(p, REQUESTED)) {
1754 /*
1755 * Indicate that this packet is being sent in response to an
1756 * explicit request from the firmware side.
1757 */
1758 flags |= BRCMF_FWS_HTOD_FLAG_PKT_REQUESTED;
1759 }
1760 brcmf_skb_htod_tag_set_field(p, FLAGS, flags);
1761 return brcmf_fws_hdrpush(fws, p);
1762 }
1763
1764 static void brcmf_fws_rollback_toq(struct brcmf_fws_info *fws,
1765 struct sk_buff *skb, int fifo)
1766 {
1767 struct brcmf_fws_mac_descriptor *entry;
1768 struct sk_buff *pktout;
1769 int qidx, hslot;
1770 int rc = 0;
1771
1772 entry = brcmf_skbcb(skb)->mac;
1773 if (entry->occupied) {
1774 qidx = 2 * fifo;
1775 if (brcmf_skbcb(skb)->state == BRCMF_FWS_SKBSTATE_SUPPRESSED)
1776 qidx++;
1777
1778 pktout = brcmu_pktq_penq_head(&entry->psq, qidx, skb);
1779 if (pktout == NULL) {
1780 brcmf_err("%s queue %d full\n", entry->name, qidx);
1781 rc = -ENOSPC;
1782 }
1783 } else {
1784 brcmf_err("%s entry removed\n", entry->name);
1785 rc = -ENOENT;
1786 }
1787
1788 if (rc) {
1789 fws->stats.rollback_failed++;
1790 hslot = brcmf_skb_htod_tag_get_field(skb, HSLOT);
1791 brcmf_fws_txs_process(fws, BRCMF_FWS_TXSTATUS_HOST_TOSSED,
1792 hslot, 0, 0);
1793 } else {
1794 fws->stats.rollback_success++;
1795 brcmf_fws_return_credits(fws, fifo, 1);
1796 brcmf_fws_macdesc_return_req_credit(skb);
1797 }
1798 }
1799
1800 static int brcmf_fws_borrow_credit(struct brcmf_fws_info *fws)
1801 {
1802 int lender_ac;
1803
1804 if (time_after(fws->borrow_defer_timestamp, jiffies)) {
1805 fws->fifo_credit_map &= ~(1 << BRCMF_FWS_FIFO_AC_BE);
1806 return -ENAVAIL;
1807 }
1808
1809 for (lender_ac = 0; lender_ac <= BRCMF_FWS_FIFO_AC_VO; lender_ac++) {
1810 if (fws->fifo_credit[lender_ac]) {
1811 fws->credits_borrowed[lender_ac]++;
1812 fws->fifo_credit[lender_ac]--;
1813 if (fws->fifo_credit[lender_ac] == 0)
1814 fws->fifo_credit_map &= ~(1 << lender_ac);
1815 fws->fifo_credit_map |= (1 << BRCMF_FWS_FIFO_AC_BE);
1816 brcmf_dbg(DATA, "borrow credit from: %d\n", lender_ac);
1817 return 0;
1818 }
1819 }
1820 fws->fifo_credit_map &= ~(1 << BRCMF_FWS_FIFO_AC_BE);
1821 return -ENAVAIL;
1822 }
1823
1824 static int brcmf_fws_commit_skb(struct brcmf_fws_info *fws, int fifo,
1825 struct sk_buff *skb)
1826 {
1827 struct brcmf_skbuff_cb *skcb = brcmf_skbcb(skb);
1828 struct brcmf_fws_mac_descriptor *entry;
1829 int rc;
1830 u8 ifidx;
1831 u8 data_offset;
1832
1833 entry = skcb->mac;
1834 if (IS_ERR(entry))
1835 return PTR_ERR(entry);
1836
1837 data_offset = brcmf_fws_precommit_skb(fws, fifo, skb);
1838 entry->transit_count++;
1839 if (entry->suppressed)
1840 entry->suppr_transit_count++;
1841 ifidx = brcmf_skb_if_flags_get_field(skb, INDEX);
1842 brcmf_fws_unlock(fws);
1843 rc = brcmf_proto_txdata(fws->drvr, ifidx, data_offset, skb);
1844 brcmf_fws_lock(fws);
1845 brcmf_dbg(DATA, "%s flags %X htod %X bus_tx %d\n", entry->name,
1846 skcb->if_flags, skcb->htod, rc);
1847 if (rc < 0) {
1848 entry->transit_count--;
1849 if (entry->suppressed)
1850 entry->suppr_transit_count--;
1851 brcmf_proto_hdrpull(fws->drvr, false, &ifidx, skb);
1852 goto rollback;
1853 }
1854
1855 fws->stats.pkt2bus++;
1856 fws->stats.send_pkts[fifo]++;
1857 if (brcmf_skb_if_flags_get_field(skb, REQUESTED))
1858 fws->stats.requested_sent[fifo]++;
1859
1860 return rc;
1861
1862 rollback:
1863 brcmf_fws_rollback_toq(fws, skb, fifo);
1864 return rc;
1865 }
1866
1867 static int brcmf_fws_assign_htod(struct brcmf_fws_info *fws, struct sk_buff *p,
1868 int fifo)
1869 {
1870 struct brcmf_skbuff_cb *skcb = brcmf_skbcb(p);
1871 int rc, hslot;
1872
1873 skcb->htod = 0;
1874 skcb->htod_seq = 0;
1875 hslot = brcmf_fws_hanger_get_free_slot(&fws->hanger);
1876 brcmf_skb_htod_tag_set_field(p, HSLOT, hslot);
1877 brcmf_skb_htod_tag_set_field(p, FREERUN, skcb->mac->seq[fifo]);
1878 brcmf_skb_htod_tag_set_field(p, FIFO, fifo);
1879 rc = brcmf_fws_hanger_pushpkt(&fws->hanger, p, hslot);
1880 if (!rc)
1881 skcb->mac->seq[fifo]++;
1882 else
1883 fws->stats.generic_error++;
1884 return rc;
1885 }
1886
1887 int brcmf_fws_process_skb(struct brcmf_if *ifp, struct sk_buff *skb)
1888 {
1889 struct brcmf_pub *drvr = ifp->drvr;
1890 struct brcmf_fws_info *fws = drvr->fws;
1891 struct brcmf_skbuff_cb *skcb = brcmf_skbcb(skb);
1892 struct ethhdr *eh = (struct ethhdr *)(skb->data);
1893 int fifo = BRCMF_FWS_FIFO_BCMC;
1894 bool multicast = is_multicast_ether_addr(eh->h_dest);
1895 int rc = 0;
1896
1897 brcmf_dbg(DATA, "tx proto=0x%X\n", ntohs(eh->h_proto));
1898 /* determine the priority */
1899 if (!skb->priority)
1900 skb->priority = cfg80211_classify8021d(skb, NULL);
1901
1902 drvr->tx_multicast += !!multicast;
1903
1904 if (fws->avoid_queueing) {
1905 rc = brcmf_proto_txdata(drvr, ifp->ifidx, 0, skb);
1906 if (rc < 0)
1907 brcmf_txfinalize(drvr, skb, ifp->ifidx, false);
1908 return rc;
1909 }
1910
1911 /* set control buffer information */
1912 skcb->if_flags = 0;
1913 skcb->state = BRCMF_FWS_SKBSTATE_NEW;
1914 brcmf_skb_if_flags_set_field(skb, INDEX, ifp->ifidx);
1915 if (!multicast)
1916 fifo = brcmf_fws_prio2fifo[skb->priority];
1917
1918 brcmf_fws_lock(fws);
1919 if (fifo != BRCMF_FWS_FIFO_AC_BE && fifo < BRCMF_FWS_FIFO_BCMC)
1920 fws->borrow_defer_timestamp = jiffies +
1921 BRCMF_FWS_BORROW_DEFER_PERIOD;
1922
1923 skcb->mac = brcmf_fws_macdesc_find(fws, ifp, eh->h_dest);
1924 brcmf_dbg(DATA, "%s mac %pM multi %d fifo %d\n", skcb->mac->name,
1925 eh->h_dest, multicast, fifo);
1926 if (!brcmf_fws_assign_htod(fws, skb, fifo)) {
1927 brcmf_fws_enq(fws, BRCMF_FWS_SKBSTATE_DELAYED, fifo, skb);
1928 brcmf_fws_schedule_deq(fws);
1929 } else {
1930 brcmf_err("drop skb: no hanger slot\n");
1931 brcmf_txfinalize(drvr, skb, ifp->ifidx, false);
1932 rc = -ENOMEM;
1933 }
1934 brcmf_fws_unlock(fws);
1935
1936 return rc;
1937 }
1938
1939 void brcmf_fws_reset_interface(struct brcmf_if *ifp)
1940 {
1941 struct brcmf_fws_mac_descriptor *entry = ifp->fws_desc;
1942
1943 brcmf_dbg(TRACE, "enter: idx=%d\n", ifp->bssidx);
1944 if (!entry)
1945 return;
1946
1947 brcmf_fws_macdesc_init(entry, ifp->mac_addr, ifp->ifidx);
1948 }
1949
1950 void brcmf_fws_add_interface(struct brcmf_if *ifp)
1951 {
1952 struct brcmf_fws_info *fws = ifp->drvr->fws;
1953 struct brcmf_fws_mac_descriptor *entry;
1954
1955 if (!ifp->ndev)
1956 return;
1957
1958 entry = &fws->desc.iface[ifp->ifidx];
1959 ifp->fws_desc = entry;
1960 brcmf_fws_macdesc_init(entry, ifp->mac_addr, ifp->ifidx);
1961 brcmf_fws_macdesc_set_name(fws, entry);
1962 brcmu_pktq_init(&entry->psq, BRCMF_FWS_PSQ_PREC_COUNT,
1963 BRCMF_FWS_PSQ_LEN);
1964 brcmf_dbg(TRACE, "added %s\n", entry->name);
1965 }
1966
1967 void brcmf_fws_del_interface(struct brcmf_if *ifp)
1968 {
1969 struct brcmf_fws_mac_descriptor *entry = ifp->fws_desc;
1970
1971 if (!entry)
1972 return;
1973
1974 brcmf_fws_lock(ifp->drvr->fws);
1975 ifp->fws_desc = NULL;
1976 brcmf_dbg(TRACE, "deleting %s\n", entry->name);
1977 brcmf_fws_macdesc_deinit(entry);
1978 brcmf_fws_cleanup(ifp->drvr->fws, ifp->ifidx);
1979 brcmf_fws_unlock(ifp->drvr->fws);
1980 }
1981
1982 static void brcmf_fws_dequeue_worker(struct work_struct *worker)
1983 {
1984 struct brcmf_fws_info *fws;
1985 struct brcmf_pub *drvr;
1986 struct sk_buff *skb;
1987 int fifo;
1988 u32 hslot;
1989 u32 ifidx;
1990 int ret;
1991
1992 fws = container_of(worker, struct brcmf_fws_info, fws_dequeue_work);
1993 drvr = fws->drvr;
1994
1995 brcmf_fws_lock(fws);
1996 for (fifo = BRCMF_FWS_FIFO_BCMC; fifo >= 0 && !fws->bus_flow_blocked;
1997 fifo--) {
1998 if (!brcmf_fws_fc_active(fws)) {
1999 while ((skb = brcmf_fws_deq(fws, fifo)) != NULL) {
2000 hslot = brcmf_skb_htod_tag_get_field(skb,
2001 HSLOT);
2002 brcmf_fws_hanger_poppkt(&fws->hanger, hslot,
2003 &skb, true);
2004 ifidx = brcmf_skb_if_flags_get_field(skb,
2005 INDEX);
2006 /* Use proto layer to send data frame */
2007 brcmf_fws_unlock(fws);
2008 ret = brcmf_proto_txdata(drvr, ifidx, 0, skb);
2009 brcmf_fws_lock(fws);
2010 if (ret < 0)
2011 brcmf_txfinalize(drvr, skb, ifidx,
2012 false);
2013 if (fws->bus_flow_blocked)
2014 break;
2015 }
2016 continue;
2017 }
2018 while ((fws->fifo_credit[fifo]) || ((!fws->bcmc_credit_check) &&
2019 (fifo == BRCMF_FWS_FIFO_BCMC))) {
2020 skb = brcmf_fws_deq(fws, fifo);
2021 if (!skb)
2022 break;
2023 fws->fifo_credit[fifo]--;
2024 if (brcmf_fws_commit_skb(fws, fifo, skb))
2025 break;
2026 if (fws->bus_flow_blocked)
2027 break;
2028 }
2029 if ((fifo == BRCMF_FWS_FIFO_AC_BE) &&
2030 (fws->fifo_credit[fifo] == 0) &&
2031 (!fws->bus_flow_blocked)) {
2032 while (brcmf_fws_borrow_credit(fws) == 0) {
2033 skb = brcmf_fws_deq(fws, fifo);
2034 if (!skb) {
2035 brcmf_fws_return_credits(fws, fifo, 1);
2036 break;
2037 }
2038 if (brcmf_fws_commit_skb(fws, fifo, skb))
2039 break;
2040 if (fws->bus_flow_blocked)
2041 break;
2042 }
2043 }
2044 }
2045 brcmf_fws_unlock(fws);
2046 }
2047
2048 #ifdef DEBUG
2049 static int brcmf_debugfs_fws_stats_read(struct seq_file *seq, void *data)
2050 {
2051 struct brcmf_bus *bus_if = dev_get_drvdata(seq->private);
2052 struct brcmf_fws_stats *fwstats = &bus_if->drvr->fws->stats;
2053
2054 seq_printf(seq,
2055 "header_pulls: %u\n"
2056 "header_only_pkt: %u\n"
2057 "tlv_parse_failed: %u\n"
2058 "tlv_invalid_type: %u\n"
2059 "mac_update_fails: %u\n"
2060 "ps_update_fails: %u\n"
2061 "if_update_fails: %u\n"
2062 "pkt2bus: %u\n"
2063 "generic_error: %u\n"
2064 "rollback_success: %u\n"
2065 "rollback_failed: %u\n"
2066 "delayq_full: %u\n"
2067 "supprq_full: %u\n"
2068 "txs_indicate: %u\n"
2069 "txs_discard: %u\n"
2070 "txs_suppr_core: %u\n"
2071 "txs_suppr_ps: %u\n"
2072 "txs_tossed: %u\n"
2073 "txs_host_tossed: %u\n"
2074 "bus_flow_block: %u\n"
2075 "fws_flow_block: %u\n"
2076 "send_pkts: BK:%u BE:%u VO:%u VI:%u BCMC:%u\n"
2077 "requested_sent: BK:%u BE:%u VO:%u VI:%u BCMC:%u\n",
2078 fwstats->header_pulls,
2079 fwstats->header_only_pkt,
2080 fwstats->tlv_parse_failed,
2081 fwstats->tlv_invalid_type,
2082 fwstats->mac_update_failed,
2083 fwstats->mac_ps_update_failed,
2084 fwstats->if_update_failed,
2085 fwstats->pkt2bus,
2086 fwstats->generic_error,
2087 fwstats->rollback_success,
2088 fwstats->rollback_failed,
2089 fwstats->delayq_full_error,
2090 fwstats->supprq_full_error,
2091 fwstats->txs_indicate,
2092 fwstats->txs_discard,
2093 fwstats->txs_supp_core,
2094 fwstats->txs_supp_ps,
2095 fwstats->txs_tossed,
2096 fwstats->txs_host_tossed,
2097 fwstats->bus_flow_block,
2098 fwstats->fws_flow_block,
2099 fwstats->send_pkts[0], fwstats->send_pkts[1],
2100 fwstats->send_pkts[2], fwstats->send_pkts[3],
2101 fwstats->send_pkts[4],
2102 fwstats->requested_sent[0],
2103 fwstats->requested_sent[1],
2104 fwstats->requested_sent[2],
2105 fwstats->requested_sent[3],
2106 fwstats->requested_sent[4]);
2107
2108 return 0;
2109 }
2110 #else
2111 static int brcmf_debugfs_fws_stats_read(struct seq_file *seq, void *data)
2112 {
2113 return 0;
2114 }
2115 #endif
2116
2117 int brcmf_fws_init(struct brcmf_pub *drvr)
2118 {
2119 struct brcmf_fws_info *fws;
2120 u32 tlv = BRCMF_FWS_FLAGS_RSSI_SIGNALS;
2121 int rc;
2122 u32 mode;
2123
2124 drvr->fws = kzalloc(sizeof(*(drvr->fws)), GFP_KERNEL);
2125 if (!drvr->fws) {
2126 rc = -ENOMEM;
2127 goto fail;
2128 }
2129
2130 fws = drvr->fws;
2131
2132 spin_lock_init(&fws->spinlock);
2133
2134 /* set linkage back */
2135 fws->drvr = drvr;
2136 fws->fcmode = fcmode;
2137
2138 if ((drvr->bus_if->always_use_fws_queue == false) &&
2139 (fcmode == BRCMF_FWS_FCMODE_NONE)) {
2140 fws->avoid_queueing = true;
2141 brcmf_dbg(INFO, "FWS queueing will be avoided\n");
2142 return 0;
2143 }
2144
2145 fws->fws_wq = create_singlethread_workqueue("brcmf_fws_wq");
2146 if (fws->fws_wq == NULL) {
2147 brcmf_err("workqueue creation failed\n");
2148 rc = -EBADF;
2149 goto fail;
2150 }
2151 INIT_WORK(&fws->fws_dequeue_work, brcmf_fws_dequeue_worker);
2152
2153 /* enable firmware signalling if fcmode active */
2154 if (fws->fcmode != BRCMF_FWS_FCMODE_NONE)
2155 tlv |= BRCMF_FWS_FLAGS_XONXOFF_SIGNALS |
2156 BRCMF_FWS_FLAGS_CREDIT_STATUS_SIGNALS |
2157 BRCMF_FWS_FLAGS_HOST_PROPTXSTATUS_ACTIVE |
2158 BRCMF_FWS_FLAGS_HOST_RXREORDER_ACTIVE;
2159
2160 rc = brcmf_fweh_register(drvr, BRCMF_E_FIFO_CREDIT_MAP,
2161 brcmf_fws_notify_credit_map);
2162 if (rc < 0) {
2163 brcmf_err("register credit map handler failed\n");
2164 goto fail;
2165 }
2166 rc = brcmf_fweh_register(drvr, BRCMF_E_BCMC_CREDIT_SUPPORT,
2167 brcmf_fws_notify_bcmc_credit_support);
2168 if (rc < 0) {
2169 brcmf_err("register bcmc credit handler failed\n");
2170 brcmf_fweh_unregister(drvr, BRCMF_E_FIFO_CREDIT_MAP);
2171 goto fail;
2172 }
2173
2174 /* Setting the iovar may fail if feature is unsupported
2175 * so leave the rc as is so driver initialization can
2176 * continue. Set mode back to none indicating not enabled.
2177 */
2178 fws->fw_signals = true;
2179 if (brcmf_fil_iovar_int_set(drvr->iflist[0], "tlv", tlv)) {
2180 brcmf_err("failed to set bdcv2 tlv signaling\n");
2181 fws->fcmode = BRCMF_FWS_FCMODE_NONE;
2182 fws->fw_signals = false;
2183 }
2184
2185 if (brcmf_fil_iovar_int_set(drvr->iflist[0], "ampdu_hostreorder", 1))
2186 brcmf_dbg(INFO, "enabling AMPDU host-reorder failed\n");
2187
2188 /* Enable seq number reuse, if supported */
2189 if (brcmf_fil_iovar_int_get(drvr->iflist[0], "wlfc_mode", &mode) == 0) {
2190 if (BRCMF_FWS_MODE_GET_REUSESEQ(mode)) {
2191 mode = 0;
2192 BRCMF_FWS_MODE_SET_REUSESEQ(mode, 1);
2193 if (brcmf_fil_iovar_int_set(drvr->iflist[0],
2194 "wlfc_mode", mode) == 0) {
2195 BRCMF_FWS_MODE_SET_REUSESEQ(fws->mode, 1);
2196 }
2197 }
2198 }
2199
2200 brcmf_fws_hanger_init(&fws->hanger);
2201 brcmf_fws_macdesc_init(&fws->desc.other, NULL, 0);
2202 brcmf_fws_macdesc_set_name(fws, &fws->desc.other);
2203 brcmu_pktq_init(&fws->desc.other.psq, BRCMF_FWS_PSQ_PREC_COUNT,
2204 BRCMF_FWS_PSQ_LEN);
2205
2206 /* create debugfs file for statistics */
2207 brcmf_debugfs_add_entry(drvr, "fws_stats",
2208 brcmf_debugfs_fws_stats_read);
2209
2210 brcmf_dbg(INFO, "%s bdcv2 tlv signaling [%x]\n",
2211 fws->fw_signals ? "enabled" : "disabled", tlv);
2212 return 0;
2213
2214 fail:
2215 brcmf_fws_deinit(drvr);
2216 return rc;
2217 }
2218
2219 void brcmf_fws_deinit(struct brcmf_pub *drvr)
2220 {
2221 struct brcmf_fws_info *fws = drvr->fws;
2222
2223 if (!fws)
2224 return;
2225
2226 if (drvr->fws->fws_wq)
2227 destroy_workqueue(drvr->fws->fws_wq);
2228
2229 /* cleanup */
2230 brcmf_fws_lock(fws);
2231 brcmf_fws_cleanup(fws, -1);
2232 drvr->fws = NULL;
2233 brcmf_fws_unlock(fws);
2234
2235 /* free top structure */
2236 kfree(fws);
2237 }
2238
2239 bool brcmf_fws_fc_active(struct brcmf_fws_info *fws)
2240 {
2241 if (!fws->creditmap_received)
2242 return false;
2243
2244 return fws->fcmode != BRCMF_FWS_FCMODE_NONE;
2245 }
2246
2247 void brcmf_fws_bustxfail(struct brcmf_fws_info *fws, struct sk_buff *skb)
2248 {
2249 u32 hslot;
2250
2251 if (brcmf_skbcb(skb)->state == BRCMF_FWS_SKBSTATE_TIM) {
2252 brcmu_pkt_buf_free_skb(skb);
2253 return;
2254 }
2255 brcmf_fws_lock(fws);
2256 hslot = brcmf_skb_htod_tag_get_field(skb, HSLOT);
2257 brcmf_fws_txs_process(fws, BRCMF_FWS_TXSTATUS_HOST_TOSSED, hslot, 0, 0);
2258 brcmf_fws_unlock(fws);
2259 }
2260
2261 void brcmf_fws_bus_blocked(struct brcmf_pub *drvr, bool flow_blocked)
2262 {
2263 struct brcmf_fws_info *fws = drvr->fws;
2264
2265 fws->bus_flow_blocked = flow_blocked;
2266 if (!flow_blocked)
2267 brcmf_fws_schedule_deq(fws);
2268 else
2269 fws->stats.bus_flow_block++;
2270 }
Linux kernel - Deliverables
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