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1 office 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 #include "bcdc.h"
40 #include "common.h"
41  
42 /**
43 * DOC: Firmware Signalling
44 *
45 * Firmware can send signals to host and vice versa, which are passed in the
46 * data packets using TLV based header. This signalling layer is on top of the
47 * BDC bus protocol layer.
48 */
49  
50 /*
51 * single definition for firmware-driver flow control tlv's.
52 *
53 * each tlv is specified by BRCMF_FWS_TLV_DEF(name, ID, length).
54 * A length value 0 indicates variable length tlv.
55 */
56 #define BRCMF_FWS_TLV_DEFLIST \
57 BRCMF_FWS_TLV_DEF(MAC_OPEN, 1, 1) \
58 BRCMF_FWS_TLV_DEF(MAC_CLOSE, 2, 1) \
59 BRCMF_FWS_TLV_DEF(MAC_REQUEST_CREDIT, 3, 2) \
60 BRCMF_FWS_TLV_DEF(TXSTATUS, 4, 4) \
61 BRCMF_FWS_TLV_DEF(PKTTAG, 5, 4) \
62 BRCMF_FWS_TLV_DEF(MACDESC_ADD, 6, 8) \
63 BRCMF_FWS_TLV_DEF(MACDESC_DEL, 7, 8) \
64 BRCMF_FWS_TLV_DEF(RSSI, 8, 1) \
65 BRCMF_FWS_TLV_DEF(INTERFACE_OPEN, 9, 1) \
66 BRCMF_FWS_TLV_DEF(INTERFACE_CLOSE, 10, 1) \
67 BRCMF_FWS_TLV_DEF(FIFO_CREDITBACK, 11, 6) \
68 BRCMF_FWS_TLV_DEF(PENDING_TRAFFIC_BMP, 12, 2) \
69 BRCMF_FWS_TLV_DEF(MAC_REQUEST_PACKET, 13, 3) \
70 BRCMF_FWS_TLV_DEF(HOST_REORDER_RXPKTS, 14, 10) \
71 BRCMF_FWS_TLV_DEF(TRANS_ID, 18, 6) \
72 BRCMF_FWS_TLV_DEF(COMP_TXSTATUS, 19, 1) \
73 BRCMF_FWS_TLV_DEF(FILLER, 255, 0)
74  
75 /*
76 * enum brcmf_fws_tlv_type - definition of tlv identifiers.
77 */
78 #define BRCMF_FWS_TLV_DEF(name, id, len) \
79 BRCMF_FWS_TYPE_ ## name = id,
80 enum brcmf_fws_tlv_type {
81 BRCMF_FWS_TLV_DEFLIST
82 BRCMF_FWS_TYPE_INVALID
83 };
84 #undef BRCMF_FWS_TLV_DEF
85  
86 /*
87 * enum brcmf_fws_tlv_len - definition of tlv lengths.
88 */
89 #define BRCMF_FWS_TLV_DEF(name, id, len) \
90 BRCMF_FWS_TYPE_ ## name ## _LEN = (len),
91 enum brcmf_fws_tlv_len {
92 BRCMF_FWS_TLV_DEFLIST
93 };
94 #undef BRCMF_FWS_TLV_DEF
95  
96 /* AMPDU rx reordering definitions */
97 #define BRCMF_RXREORDER_FLOWID_OFFSET 0
98 #define BRCMF_RXREORDER_MAXIDX_OFFSET 2
99 #define BRCMF_RXREORDER_FLAGS_OFFSET 4
100 #define BRCMF_RXREORDER_CURIDX_OFFSET 6
101 #define BRCMF_RXREORDER_EXPIDX_OFFSET 8
102  
103 #define BRCMF_RXREORDER_DEL_FLOW 0x01
104 #define BRCMF_RXREORDER_FLUSH_ALL 0x02
105 #define BRCMF_RXREORDER_CURIDX_VALID 0x04
106 #define BRCMF_RXREORDER_EXPIDX_VALID 0x08
107 #define BRCMF_RXREORDER_NEW_HOLE 0x10
108  
109 #ifdef DEBUG
110 /*
111 * brcmf_fws_tlv_names - array of tlv names.
112 */
113 #define BRCMF_FWS_TLV_DEF(name, id, len) \
114 { id, #name },
115 static struct {
116 enum brcmf_fws_tlv_type id;
117 const char *name;
118 } brcmf_fws_tlv_names[] = {
119 BRCMF_FWS_TLV_DEFLIST
120 };
121 #undef BRCMF_FWS_TLV_DEF
122  
123  
124 static const char *brcmf_fws_get_tlv_name(enum brcmf_fws_tlv_type id)
125 {
126 int i;
127  
128 for (i = 0; i < ARRAY_SIZE(brcmf_fws_tlv_names); i++)
129 if (brcmf_fws_tlv_names[i].id == id)
130 return brcmf_fws_tlv_names[i].name;
131  
132 return "INVALID";
133 }
134 #else
135 static const char *brcmf_fws_get_tlv_name(enum brcmf_fws_tlv_type id)
136 {
137 return "NODEBUG";
138 }
139 #endif /* DEBUG */
140  
141 /*
142 * The PKTTAG tlv has additional bytes when firmware-signalling
143 * mode has REUSESEQ flag set.
144 */
145 #define BRCMF_FWS_TYPE_SEQ_LEN 2
146  
147 /*
148 * flags used to enable tlv signalling from firmware.
149 */
150 #define BRCMF_FWS_FLAGS_RSSI_SIGNALS 0x0001
151 #define BRCMF_FWS_FLAGS_XONXOFF_SIGNALS 0x0002
152 #define BRCMF_FWS_FLAGS_CREDIT_STATUS_SIGNALS 0x0004
153 #define BRCMF_FWS_FLAGS_HOST_PROPTXSTATUS_ACTIVE 0x0008
154 #define BRCMF_FWS_FLAGS_PSQ_GENERATIONFSM_ENABLE 0x0010
155 #define BRCMF_FWS_FLAGS_PSQ_ZERO_BUFFER_ENABLE 0x0020
156 #define BRCMF_FWS_FLAGS_HOST_RXREORDER_ACTIVE 0x0040
157  
158 #define BRCMF_FWS_MAC_DESC_TABLE_SIZE 32
159 #define BRCMF_FWS_MAC_DESC_ID_INVALID 0xff
160  
161 #define BRCMF_FWS_HOSTIF_FLOWSTATE_OFF 0
162 #define BRCMF_FWS_HOSTIF_FLOWSTATE_ON 1
163 #define BRCMF_FWS_FLOWCONTROL_HIWATER 128
164 #define BRCMF_FWS_FLOWCONTROL_LOWATER 64
165  
166 #define BRCMF_FWS_PSQ_PREC_COUNT ((BRCMF_FWS_FIFO_COUNT + 1) * 2)
167 #define BRCMF_FWS_PSQ_LEN 256
168  
169 #define BRCMF_FWS_HTOD_FLAG_PKTFROMHOST 0x01
170 #define BRCMF_FWS_HTOD_FLAG_PKT_REQUESTED 0x02
171  
172 #define BRCMF_FWS_RET_OK_NOSCHEDULE 0
173 #define BRCMF_FWS_RET_OK_SCHEDULE 1
174  
175 #define BRCMF_FWS_MODE_REUSESEQ_SHIFT 3 /* seq reuse */
176 #define BRCMF_FWS_MODE_SET_REUSESEQ(x, val) ((x) = \
177 ((x) & ~(1 << BRCMF_FWS_MODE_REUSESEQ_SHIFT)) | \
178 (((val) & 1) << BRCMF_FWS_MODE_REUSESEQ_SHIFT))
179 #define BRCMF_FWS_MODE_GET_REUSESEQ(x) \
180 (((x) >> BRCMF_FWS_MODE_REUSESEQ_SHIFT) & 1)
181  
182 /**
183 * enum brcmf_fws_skb_state - indicates processing state of skb.
184 *
185 * @BRCMF_FWS_SKBSTATE_NEW: sk_buff is newly arrived in the driver.
186 * @BRCMF_FWS_SKBSTATE_DELAYED: sk_buff had to wait on queue.
187 * @BRCMF_FWS_SKBSTATE_SUPPRESSED: sk_buff has been suppressed by firmware.
188 * @BRCMF_FWS_SKBSTATE_TIM: allocated for TIM update info.
189 */
190 enum brcmf_fws_skb_state {
191 BRCMF_FWS_SKBSTATE_NEW,
192 BRCMF_FWS_SKBSTATE_DELAYED,
193 BRCMF_FWS_SKBSTATE_SUPPRESSED,
194 BRCMF_FWS_SKBSTATE_TIM
195 };
196  
197 /**
198 * struct brcmf_skbuff_cb - control buffer associated with skbuff.
199 *
200 * @bus_flags: 2 bytes reserved for bus specific parameters
201 * @if_flags: holds interface index and packet related flags.
202 * @htod: host to device packet identifier (used in PKTTAG tlv).
203 * @htod_seq: this 16-bit is original seq number for every suppress packet.
204 * @state: transmit state of the packet.
205 * @mac: descriptor related to destination for this packet.
206 *
207 * This information is stored in control buffer struct sk_buff::cb, which
208 * provides 48 bytes of storage so this structure should not exceed that.
209 */
210 struct brcmf_skbuff_cb {
211 u16 bus_flags;
212 u16 if_flags;
213 u32 htod;
214 u16 htod_seq;
215 enum brcmf_fws_skb_state state;
216 struct brcmf_fws_mac_descriptor *mac;
217 };
218  
219 /*
220 * macro casting skbuff control buffer to struct brcmf_skbuff_cb.
221 */
222 #define brcmf_skbcb(skb) ((struct brcmf_skbuff_cb *)((skb)->cb))
223  
224 /*
225 * sk_buff control if flags
226 *
227 * b[11] - packet sent upon firmware request.
228 * b[10] - packet only contains signalling data.
229 * b[9] - packet is a tx packet.
230 * b[8] - packet used requested credit
231 * b[7] - interface in AP mode.
232 * b[3:0] - interface index.
233 */
234 #define BRCMF_SKB_IF_FLAGS_REQUESTED_MASK 0x0800
235 #define BRCMF_SKB_IF_FLAGS_REQUESTED_SHIFT 11
236 #define BRCMF_SKB_IF_FLAGS_SIGNAL_ONLY_MASK 0x0400
237 #define BRCMF_SKB_IF_FLAGS_SIGNAL_ONLY_SHIFT 10
238 #define BRCMF_SKB_IF_FLAGS_TRANSMIT_MASK 0x0200
239 #define BRCMF_SKB_IF_FLAGS_TRANSMIT_SHIFT 9
240 #define BRCMF_SKB_IF_FLAGS_REQ_CREDIT_MASK 0x0100
241 #define BRCMF_SKB_IF_FLAGS_REQ_CREDIT_SHIFT 8
242 #define BRCMF_SKB_IF_FLAGS_IF_AP_MASK 0x0080
243 #define BRCMF_SKB_IF_FLAGS_IF_AP_SHIFT 7
244 #define BRCMF_SKB_IF_FLAGS_INDEX_MASK 0x000f
245 #define BRCMF_SKB_IF_FLAGS_INDEX_SHIFT 0
246  
247 #define brcmf_skb_if_flags_set_field(skb, field, value) \
248 brcmu_maskset16(&(brcmf_skbcb(skb)->if_flags), \
249 BRCMF_SKB_IF_FLAGS_ ## field ## _MASK, \
250 BRCMF_SKB_IF_FLAGS_ ## field ## _SHIFT, (value))
251 #define brcmf_skb_if_flags_get_field(skb, field) \
252 brcmu_maskget16(brcmf_skbcb(skb)->if_flags, \
253 BRCMF_SKB_IF_FLAGS_ ## field ## _MASK, \
254 BRCMF_SKB_IF_FLAGS_ ## field ## _SHIFT)
255  
256 /*
257 * sk_buff control packet identifier
258 *
259 * 32-bit packet identifier used in PKTTAG tlv from host to dongle.
260 *
261 * - Generated at the host (e.g. dhd)
262 * - Seen as a generic sequence number by firmware except for the flags field.
263 *
264 * Generation : b[31] => generation number for this packet [host->fw]
265 * OR, current generation number [fw->host]
266 * Flags : b[30:27] => command, status flags
267 * FIFO-AC : b[26:24] => AC-FIFO id
268 * h-slot : b[23:8] => hanger-slot
269 * freerun : b[7:0] => A free running counter
270 */
271 #define BRCMF_SKB_HTOD_TAG_GENERATION_MASK 0x80000000
272 #define BRCMF_SKB_HTOD_TAG_GENERATION_SHIFT 31
273 #define BRCMF_SKB_HTOD_TAG_FLAGS_MASK 0x78000000
274 #define BRCMF_SKB_HTOD_TAG_FLAGS_SHIFT 27
275 #define BRCMF_SKB_HTOD_TAG_FIFO_MASK 0x07000000
276 #define BRCMF_SKB_HTOD_TAG_FIFO_SHIFT 24
277 #define BRCMF_SKB_HTOD_TAG_HSLOT_MASK 0x00ffff00
278 #define BRCMF_SKB_HTOD_TAG_HSLOT_SHIFT 8
279 #define BRCMF_SKB_HTOD_TAG_FREERUN_MASK 0x000000ff
280 #define BRCMF_SKB_HTOD_TAG_FREERUN_SHIFT 0
281  
282 #define brcmf_skb_htod_tag_set_field(skb, field, value) \
283 brcmu_maskset32(&(brcmf_skbcb(skb)->htod), \
284 BRCMF_SKB_HTOD_TAG_ ## field ## _MASK, \
285 BRCMF_SKB_HTOD_TAG_ ## field ## _SHIFT, (value))
286 #define brcmf_skb_htod_tag_get_field(skb, field) \
287 brcmu_maskget32(brcmf_skbcb(skb)->htod, \
288 BRCMF_SKB_HTOD_TAG_ ## field ## _MASK, \
289 BRCMF_SKB_HTOD_TAG_ ## field ## _SHIFT)
290  
291 #define BRCMF_SKB_HTOD_SEQ_FROMFW_MASK 0x2000
292 #define BRCMF_SKB_HTOD_SEQ_FROMFW_SHIFT 13
293 #define BRCMF_SKB_HTOD_SEQ_FROMDRV_MASK 0x1000
294 #define BRCMF_SKB_HTOD_SEQ_FROMDRV_SHIFT 12
295 #define BRCMF_SKB_HTOD_SEQ_NR_MASK 0x0fff
296 #define BRCMF_SKB_HTOD_SEQ_NR_SHIFT 0
297  
298 #define brcmf_skb_htod_seq_set_field(skb, field, value) \
299 brcmu_maskset16(&(brcmf_skbcb(skb)->htod_seq), \
300 BRCMF_SKB_HTOD_SEQ_ ## field ## _MASK, \
301 BRCMF_SKB_HTOD_SEQ_ ## field ## _SHIFT, (value))
302 #define brcmf_skb_htod_seq_get_field(skb, field) \
303 brcmu_maskget16(brcmf_skbcb(skb)->htod_seq, \
304 BRCMF_SKB_HTOD_SEQ_ ## field ## _MASK, \
305 BRCMF_SKB_HTOD_SEQ_ ## field ## _SHIFT)
306  
307 #define BRCMF_FWS_TXSTAT_GENERATION_MASK 0x80000000
308 #define BRCMF_FWS_TXSTAT_GENERATION_SHIFT 31
309 #define BRCMF_FWS_TXSTAT_FLAGS_MASK 0x78000000
310 #define BRCMF_FWS_TXSTAT_FLAGS_SHIFT 27
311 #define BRCMF_FWS_TXSTAT_FIFO_MASK 0x07000000
312 #define BRCMF_FWS_TXSTAT_FIFO_SHIFT 24
313 #define BRCMF_FWS_TXSTAT_HSLOT_MASK 0x00FFFF00
314 #define BRCMF_FWS_TXSTAT_HSLOT_SHIFT 8
315 #define BRCMF_FWS_TXSTAT_FREERUN_MASK 0x000000FF
316 #define BRCMF_FWS_TXSTAT_FREERUN_SHIFT 0
317  
318 #define brcmf_txstatus_get_field(txs, field) \
319 brcmu_maskget32(txs, BRCMF_FWS_TXSTAT_ ## field ## _MASK, \
320 BRCMF_FWS_TXSTAT_ ## field ## _SHIFT)
321  
322 /* How long to defer borrowing in jiffies */
323 #define BRCMF_FWS_BORROW_DEFER_PERIOD (HZ / 10)
324  
325 /**
326 * enum brcmf_fws_fifo - fifo indices used by dongle firmware.
327 *
328 * @BRCMF_FWS_FIFO_FIRST: first fifo, ie. background.
329 * @BRCMF_FWS_FIFO_AC_BK: fifo for background traffic.
330 * @BRCMF_FWS_FIFO_AC_BE: fifo for best-effort traffic.
331 * @BRCMF_FWS_FIFO_AC_VI: fifo for video traffic.
332 * @BRCMF_FWS_FIFO_AC_VO: fifo for voice traffic.
333 * @BRCMF_FWS_FIFO_BCMC: fifo for broadcast/multicast (AP only).
334 * @BRCMF_FWS_FIFO_ATIM: fifo for ATIM (AP only).
335 * @BRCMF_FWS_FIFO_COUNT: number of fifos.
336 */
337 enum brcmf_fws_fifo {
338 BRCMF_FWS_FIFO_FIRST,
339 BRCMF_FWS_FIFO_AC_BK = BRCMF_FWS_FIFO_FIRST,
340 BRCMF_FWS_FIFO_AC_BE,
341 BRCMF_FWS_FIFO_AC_VI,
342 BRCMF_FWS_FIFO_AC_VO,
343 BRCMF_FWS_FIFO_BCMC,
344 BRCMF_FWS_FIFO_ATIM,
345 BRCMF_FWS_FIFO_COUNT
346 };
347  
348 /**
349 * enum brcmf_fws_txstatus - txstatus flag values.
350 *
351 * @BRCMF_FWS_TXSTATUS_DISCARD:
352 * host is free to discard the packet.
353 * @BRCMF_FWS_TXSTATUS_CORE_SUPPRESS:
354 * 802.11 core suppressed the packet.
355 * @BRCMF_FWS_TXSTATUS_FW_PS_SUPPRESS:
356 * firmware suppress the packet as device is already in PS mode.
357 * @BRCMF_FWS_TXSTATUS_FW_TOSSED:
358 * firmware tossed the packet.
359 * @BRCMF_FWS_TXSTATUS_HOST_TOSSED:
360 * host tossed the packet.
361 */
362 enum brcmf_fws_txstatus {
363 BRCMF_FWS_TXSTATUS_DISCARD,
364 BRCMF_FWS_TXSTATUS_CORE_SUPPRESS,
365 BRCMF_FWS_TXSTATUS_FW_PS_SUPPRESS,
366 BRCMF_FWS_TXSTATUS_FW_TOSSED,
367 BRCMF_FWS_TXSTATUS_HOST_TOSSED
368 };
369  
370 enum brcmf_fws_fcmode {
371 BRCMF_FWS_FCMODE_NONE,
372 BRCMF_FWS_FCMODE_IMPLIED_CREDIT,
373 BRCMF_FWS_FCMODE_EXPLICIT_CREDIT
374 };
375  
376 enum brcmf_fws_mac_desc_state {
377 BRCMF_FWS_STATE_OPEN = 1,
378 BRCMF_FWS_STATE_CLOSE
379 };
380  
381 /**
382 * struct brcmf_fws_mac_descriptor - firmware signalling data per node/interface
383 *
384 * @occupied: slot is in use.
385 * @mac_handle: handle for mac entry determined by firmware.
386 * @interface_id: interface index.
387 * @state: current state.
388 * @suppressed: mac entry is suppressed.
389 * @generation: generation bit.
390 * @ac_bitmap: ac queue bitmap.
391 * @requested_credit: credits requested by firmware.
392 * @ea: ethernet address.
393 * @seq: per-node free-running sequence.
394 * @psq: power-save queue.
395 * @transit_count: packet in transit to firmware.
396 */
397 struct brcmf_fws_mac_descriptor {
398 char name[16];
399 u8 occupied;
400 u8 mac_handle;
401 u8 interface_id;
402 u8 state;
403 bool suppressed;
404 u8 generation;
405 u8 ac_bitmap;
406 u8 requested_credit;
407 u8 requested_packet;
408 u8 ea[ETH_ALEN];
409 u8 seq[BRCMF_FWS_FIFO_COUNT];
410 struct pktq psq;
411 int transit_count;
412 int suppr_transit_count;
413 bool send_tim_signal;
414 u8 traffic_pending_bmp;
415 u8 traffic_lastreported_bmp;
416 };
417  
418 #define BRCMF_FWS_HANGER_MAXITEMS 1024
419  
420 /**
421 * enum brcmf_fws_hanger_item_state - state of hanger item.
422 *
423 * @BRCMF_FWS_HANGER_ITEM_STATE_FREE: item is free for use.
424 * @BRCMF_FWS_HANGER_ITEM_STATE_INUSE: item is in use.
425 * @BRCMF_FWS_HANGER_ITEM_STATE_INUSE_SUPPRESSED: item was suppressed.
426 */
427 enum brcmf_fws_hanger_item_state {
428 BRCMF_FWS_HANGER_ITEM_STATE_FREE = 1,
429 BRCMF_FWS_HANGER_ITEM_STATE_INUSE,
430 BRCMF_FWS_HANGER_ITEM_STATE_INUSE_SUPPRESSED
431 };
432  
433  
434 /**
435 * struct brcmf_fws_hanger_item - single entry for tx pending packet.
436 *
437 * @state: entry is either free or occupied.
438 * @pkt: packet itself.
439 */
440 struct brcmf_fws_hanger_item {
441 enum brcmf_fws_hanger_item_state state;
442 struct sk_buff *pkt;
443 };
444  
445 /**
446 * struct brcmf_fws_hanger - holds packets awaiting firmware txstatus.
447 *
448 * @pushed: packets pushed to await txstatus.
449 * @popped: packets popped upon handling txstatus.
450 * @failed_to_push: packets that could not be pushed.
451 * @failed_to_pop: packets that could not be popped.
452 * @failed_slotfind: packets for which failed to find an entry.
453 * @slot_pos: last returned item index for a free entry.
454 * @items: array of hanger items.
455 */
456 struct brcmf_fws_hanger {
457 u32 pushed;
458 u32 popped;
459 u32 failed_to_push;
460 u32 failed_to_pop;
461 u32 failed_slotfind;
462 u32 slot_pos;
463 struct brcmf_fws_hanger_item items[BRCMF_FWS_HANGER_MAXITEMS];
464 };
465  
466 struct brcmf_fws_macdesc_table {
467 struct brcmf_fws_mac_descriptor nodes[BRCMF_FWS_MAC_DESC_TABLE_SIZE];
468 struct brcmf_fws_mac_descriptor iface[BRCMF_MAX_IFS];
469 struct brcmf_fws_mac_descriptor other;
470 };
471  
472 struct brcmf_fws_stats {
473 u32 tlv_parse_failed;
474 u32 tlv_invalid_type;
475 u32 header_only_pkt;
476 u32 header_pulls;
477 u32 pkt2bus;
478 u32 send_pkts[5];
479 u32 requested_sent[5];
480 u32 generic_error;
481 u32 mac_update_failed;
482 u32 mac_ps_update_failed;
483 u32 if_update_failed;
484 u32 packet_request_failed;
485 u32 credit_request_failed;
486 u32 rollback_success;
487 u32 rollback_failed;
488 u32 delayq_full_error;
489 u32 supprq_full_error;
490 u32 txs_indicate;
491 u32 txs_discard;
492 u32 txs_supp_core;
493 u32 txs_supp_ps;
494 u32 txs_tossed;
495 u32 txs_host_tossed;
496 u32 bus_flow_block;
497 u32 fws_flow_block;
498 };
499  
500 struct brcmf_fws_info {
501 struct brcmf_pub *drvr;
502 spinlock_t spinlock;
503 ulong flags;
504 struct brcmf_fws_stats stats;
505 struct brcmf_fws_hanger hanger;
506 enum brcmf_fws_fcmode fcmode;
507 bool fw_signals;
508 bool bcmc_credit_check;
509 struct brcmf_fws_macdesc_table desc;
510 struct workqueue_struct *fws_wq;
511 struct work_struct fws_dequeue_work;
512 u32 fifo_enqpkt[BRCMF_FWS_FIFO_COUNT];
513 int fifo_credit[BRCMF_FWS_FIFO_COUNT];
514 int credits_borrowed[BRCMF_FWS_FIFO_AC_VO + 1];
515 int deq_node_pos[BRCMF_FWS_FIFO_COUNT];
516 u32 fifo_credit_map;
517 u32 fifo_delay_map;
518 unsigned long borrow_defer_timestamp;
519 bool bus_flow_blocked;
520 bool creditmap_received;
521 u8 mode;
522 bool avoid_queueing;
523 };
524  
525 /*
526 * brcmf_fws_prio2fifo - mapping from 802.1d priority to firmware fifo index.
527 */
528 static const int brcmf_fws_prio2fifo[] = {
529 BRCMF_FWS_FIFO_AC_BE,
530 BRCMF_FWS_FIFO_AC_BK,
531 BRCMF_FWS_FIFO_AC_BK,
532 BRCMF_FWS_FIFO_AC_BE,
533 BRCMF_FWS_FIFO_AC_VI,
534 BRCMF_FWS_FIFO_AC_VI,
535 BRCMF_FWS_FIFO_AC_VO,
536 BRCMF_FWS_FIFO_AC_VO
537 };
538  
539 #define BRCMF_FWS_TLV_DEF(name, id, len) \
540 case BRCMF_FWS_TYPE_ ## name: \
541 return len;
542  
543 /**
544 * brcmf_fws_get_tlv_len() - returns defined length for given tlv id.
545 *
546 * @fws: firmware-signalling information.
547 * @id: identifier of the TLV.
548 *
549 * Return: the specified length for the given TLV; Otherwise -EINVAL.
550 */
551 static int brcmf_fws_get_tlv_len(struct brcmf_fws_info *fws,
552 enum brcmf_fws_tlv_type id)
553 {
554 switch (id) {
555 BRCMF_FWS_TLV_DEFLIST
556 default:
557 fws->stats.tlv_invalid_type++;
558 break;
559 }
560 return -EINVAL;
561 }
562 #undef BRCMF_FWS_TLV_DEF
563  
564 static void brcmf_fws_lock(struct brcmf_fws_info *fws)
565 __acquires(&fws->spinlock)
566 {
567 spin_lock_irqsave(&fws->spinlock, fws->flags);
568 }
569  
570 static void brcmf_fws_unlock(struct brcmf_fws_info *fws)
571 __releases(&fws->spinlock)
572 {
573 spin_unlock_irqrestore(&fws->spinlock, fws->flags);
574 }
575  
576 static bool brcmf_fws_ifidx_match(struct sk_buff *skb, void *arg)
577 {
578 u32 ifidx = brcmf_skb_if_flags_get_field(skb, INDEX);
579 return ifidx == *(int *)arg;
580 }
581  
582 static void brcmf_fws_psq_flush(struct brcmf_fws_info *fws, struct pktq *q,
583 int ifidx)
584 {
585 bool (*matchfn)(struct sk_buff *, void *) = NULL;
586 struct sk_buff *skb;
587 int prec;
588  
589 if (ifidx != -1)
590 matchfn = brcmf_fws_ifidx_match;
591 for (prec = 0; prec < q->num_prec; prec++) {
592 skb = brcmu_pktq_pdeq_match(q, prec, matchfn, &ifidx);
593 while (skb) {
594 brcmu_pkt_buf_free_skb(skb);
595 skb = brcmu_pktq_pdeq_match(q, prec, matchfn, &ifidx);
596 }
597 }
598 }
599  
600 static void brcmf_fws_hanger_init(struct brcmf_fws_hanger *hanger)
601 {
602 int i;
603  
604 memset(hanger, 0, sizeof(*hanger));
605 for (i = 0; i < ARRAY_SIZE(hanger->items); i++)
606 hanger->items[i].state = BRCMF_FWS_HANGER_ITEM_STATE_FREE;
607 }
608  
609 static u32 brcmf_fws_hanger_get_free_slot(struct brcmf_fws_hanger *h)
610 {
611 u32 i;
612  
613 i = (h->slot_pos + 1) % BRCMF_FWS_HANGER_MAXITEMS;
614  
615 while (i != h->slot_pos) {
616 if (h->items[i].state == BRCMF_FWS_HANGER_ITEM_STATE_FREE) {
617 h->slot_pos = i;
618 goto done;
619 }
620 i++;
621 if (i == BRCMF_FWS_HANGER_MAXITEMS)
622 i = 0;
623 }
624 brcmf_err("all slots occupied\n");
625 h->failed_slotfind++;
626 i = BRCMF_FWS_HANGER_MAXITEMS;
627 done:
628 return i;
629 }
630  
631 static int brcmf_fws_hanger_pushpkt(struct brcmf_fws_hanger *h,
632 struct sk_buff *pkt, u32 slot_id)
633 {
634 if (slot_id >= BRCMF_FWS_HANGER_MAXITEMS)
635 return -ENOENT;
636  
637 if (h->items[slot_id].state != BRCMF_FWS_HANGER_ITEM_STATE_FREE) {
638 brcmf_err("slot is not free\n");
639 h->failed_to_push++;
640 return -EINVAL;
641 }
642  
643 h->items[slot_id].state = BRCMF_FWS_HANGER_ITEM_STATE_INUSE;
644 h->items[slot_id].pkt = pkt;
645 h->pushed++;
646 return 0;
647 }
648  
649 static inline int brcmf_fws_hanger_poppkt(struct brcmf_fws_hanger *h,
650 u32 slot_id, struct sk_buff **pktout,
651 bool remove_item)
652 {
653 if (slot_id >= BRCMF_FWS_HANGER_MAXITEMS)
654 return -ENOENT;
655  
656 if (h->items[slot_id].state == BRCMF_FWS_HANGER_ITEM_STATE_FREE) {
657 brcmf_err("entry not in use\n");
658 h->failed_to_pop++;
659 return -EINVAL;
660 }
661  
662 *pktout = h->items[slot_id].pkt;
663 if (remove_item) {
664 h->items[slot_id].state = BRCMF_FWS_HANGER_ITEM_STATE_FREE;
665 h->items[slot_id].pkt = NULL;
666 h->popped++;
667 }
668 return 0;
669 }
670  
671 static int brcmf_fws_hanger_mark_suppressed(struct brcmf_fws_hanger *h,
672 u32 slot_id)
673 {
674 if (slot_id >= BRCMF_FWS_HANGER_MAXITEMS)
675 return -ENOENT;
676  
677 if (h->items[slot_id].state == BRCMF_FWS_HANGER_ITEM_STATE_FREE) {
678 brcmf_err("entry not in use\n");
679 return -EINVAL;
680 }
681  
682 h->items[slot_id].state = BRCMF_FWS_HANGER_ITEM_STATE_INUSE_SUPPRESSED;
683 return 0;
684 }
685  
686 static void brcmf_fws_hanger_cleanup(struct brcmf_fws_info *fws,
687 bool (*fn)(struct sk_buff *, void *),
688 int ifidx)
689 {
690 struct brcmf_fws_hanger *h = &fws->hanger;
691 struct sk_buff *skb;
692 int i;
693 enum brcmf_fws_hanger_item_state s;
694  
695 for (i = 0; i < ARRAY_SIZE(h->items); i++) {
696 s = h->items[i].state;
697 if (s == BRCMF_FWS_HANGER_ITEM_STATE_INUSE ||
698 s == BRCMF_FWS_HANGER_ITEM_STATE_INUSE_SUPPRESSED) {
699 skb = h->items[i].pkt;
700 if (fn == NULL || fn(skb, &ifidx)) {
701 /* suppress packets freed from psq */
702 if (s == BRCMF_FWS_HANGER_ITEM_STATE_INUSE)
703 brcmu_pkt_buf_free_skb(skb);
704 h->items[i].state =
705 BRCMF_FWS_HANGER_ITEM_STATE_FREE;
706 }
707 }
708 }
709 }
710  
711 static void brcmf_fws_macdesc_set_name(struct brcmf_fws_info *fws,
712 struct brcmf_fws_mac_descriptor *desc)
713 {
714 if (desc == &fws->desc.other)
715 strlcpy(desc->name, "MAC-OTHER", sizeof(desc->name));
716 else if (desc->mac_handle)
717 scnprintf(desc->name, sizeof(desc->name), "MAC-%d:%d",
718 desc->mac_handle, desc->interface_id);
719 else
720 scnprintf(desc->name, sizeof(desc->name), "MACIF:%d",
721 desc->interface_id);
722 }
723  
724 static void brcmf_fws_macdesc_init(struct brcmf_fws_mac_descriptor *desc,
725 u8 *addr, u8 ifidx)
726 {
727 brcmf_dbg(TRACE,
728 "enter: desc %p ea=%pM, ifidx=%u\n", desc, addr, ifidx);
729 desc->occupied = 1;
730 desc->state = BRCMF_FWS_STATE_OPEN;
731 desc->requested_credit = 0;
732 desc->requested_packet = 0;
733 /* depending on use may need ifp->bsscfgidx instead */
734 desc->interface_id = ifidx;
735 desc->ac_bitmap = 0xff; /* update this when handling APSD */
736 if (addr)
737 memcpy(&desc->ea[0], addr, ETH_ALEN);
738 }
739  
740 static
741 void brcmf_fws_macdesc_deinit(struct brcmf_fws_mac_descriptor *desc)
742 {
743 brcmf_dbg(TRACE,
744 "enter: ea=%pM, ifidx=%u\n", desc->ea, desc->interface_id);
745 desc->occupied = 0;
746 desc->state = BRCMF_FWS_STATE_CLOSE;
747 desc->requested_credit = 0;
748 desc->requested_packet = 0;
749 }
750  
751 static struct brcmf_fws_mac_descriptor *
752 brcmf_fws_macdesc_lookup(struct brcmf_fws_info *fws, u8 *ea)
753 {
754 struct brcmf_fws_mac_descriptor *entry;
755 int i;
756  
757 if (ea == NULL)
758 return ERR_PTR(-EINVAL);
759  
760 entry = &fws->desc.nodes[0];
761 for (i = 0; i < ARRAY_SIZE(fws->desc.nodes); i++) {
762 if (entry->occupied && !memcmp(entry->ea, ea, ETH_ALEN))
763 return entry;
764 entry++;
765 }
766  
767 return ERR_PTR(-ENOENT);
768 }
769  
770 static struct brcmf_fws_mac_descriptor*
771 brcmf_fws_macdesc_find(struct brcmf_fws_info *fws, struct brcmf_if *ifp, u8 *da)
772 {
773 struct brcmf_fws_mac_descriptor *entry = &fws->desc.other;
774 bool multicast;
775  
776 multicast = is_multicast_ether_addr(da);
777  
778 /* Multicast destination, STA and P2P clients get the interface entry.
779 * STA/GC gets the Mac Entry for TDLS destinations, TDLS destinations
780 * have their own entry.
781 */
782 if (multicast && ifp->fws_desc) {
783 entry = ifp->fws_desc;
784 goto done;
785 }
786  
787 entry = brcmf_fws_macdesc_lookup(fws, da);
788 if (IS_ERR(entry))
789 entry = ifp->fws_desc;
790  
791 done:
792 return entry;
793 }
794  
795 static bool brcmf_fws_macdesc_closed(struct brcmf_fws_info *fws,
796 struct brcmf_fws_mac_descriptor *entry,
797 int fifo)
798 {
799 struct brcmf_fws_mac_descriptor *if_entry;
800 bool closed;
801  
802 /* for unique destination entries the related interface
803 * may be closed.
804 */
805 if (entry->mac_handle) {
806 if_entry = &fws->desc.iface[entry->interface_id];
807 if (if_entry->state == BRCMF_FWS_STATE_CLOSE)
808 return true;
809 }
810 /* an entry is closed when the state is closed and
811 * the firmware did not request anything.
812 */
813 closed = entry->state == BRCMF_FWS_STATE_CLOSE &&
814 !entry->requested_credit && !entry->requested_packet;
815  
816 /* Or firmware does not allow traffic for given fifo */
817 return closed || !(entry->ac_bitmap & BIT(fifo));
818 }
819  
820 static void brcmf_fws_macdesc_cleanup(struct brcmf_fws_info *fws,
821 struct brcmf_fws_mac_descriptor *entry,
822 int ifidx)
823 {
824 if (entry->occupied && (ifidx == -1 || ifidx == entry->interface_id)) {
825 brcmf_fws_psq_flush(fws, &entry->psq, ifidx);
826 entry->occupied = !!(entry->psq.len);
827 }
828 }
829  
830 static void brcmf_fws_bus_txq_cleanup(struct brcmf_fws_info *fws,
831 bool (*fn)(struct sk_buff *, void *),
832 int ifidx)
833 {
834 struct brcmf_fws_hanger_item *hi;
835 struct pktq *txq;
836 struct sk_buff *skb;
837 int prec;
838 u32 hslot;
839  
840 txq = brcmf_bus_gettxq(fws->drvr->bus_if);
841 if (IS_ERR(txq)) {
842 brcmf_dbg(TRACE, "no txq to clean up\n");
843 return;
844 }
845  
846 for (prec = 0; prec < txq->num_prec; prec++) {
847 skb = brcmu_pktq_pdeq_match(txq, prec, fn, &ifidx);
848 while (skb) {
849 hslot = brcmf_skb_htod_tag_get_field(skb, HSLOT);
850 hi = &fws->hanger.items[hslot];
851 WARN_ON(skb != hi->pkt);
852 hi->state = BRCMF_FWS_HANGER_ITEM_STATE_FREE;
853 brcmu_pkt_buf_free_skb(skb);
854 skb = brcmu_pktq_pdeq_match(txq, prec, fn, &ifidx);
855 }
856 }
857 }
858  
859 static void brcmf_fws_cleanup(struct brcmf_fws_info *fws, int ifidx)
860 {
861 int i;
862 struct brcmf_fws_mac_descriptor *table;
863 bool (*matchfn)(struct sk_buff *, void *) = NULL;
864  
865 if (fws == NULL)
866 return;
867  
868 if (ifidx != -1)
869 matchfn = brcmf_fws_ifidx_match;
870  
871 /* cleanup individual nodes */
872 table = &fws->desc.nodes[0];
873 for (i = 0; i < ARRAY_SIZE(fws->desc.nodes); i++)
874 brcmf_fws_macdesc_cleanup(fws, &table[i], ifidx);
875  
876 brcmf_fws_macdesc_cleanup(fws, &fws->desc.other, ifidx);
877 brcmf_fws_bus_txq_cleanup(fws, matchfn, ifidx);
878 brcmf_fws_hanger_cleanup(fws, matchfn, ifidx);
879 }
880  
881 static u8 brcmf_fws_hdrpush(struct brcmf_fws_info *fws, struct sk_buff *skb)
882 {
883 struct brcmf_fws_mac_descriptor *entry = brcmf_skbcb(skb)->mac;
884 u8 *wlh;
885 u16 data_offset = 0;
886 u8 fillers;
887 __le32 pkttag = cpu_to_le32(brcmf_skbcb(skb)->htod);
888 __le16 pktseq = cpu_to_le16(brcmf_skbcb(skb)->htod_seq);
889  
890 brcmf_dbg(TRACE, "enter: %s, idx=%d hslot=%d htod %X seq %X\n",
891 entry->name, brcmf_skb_if_flags_get_field(skb, INDEX),
892 (le32_to_cpu(pkttag) >> 8) & 0xffff,
893 brcmf_skbcb(skb)->htod, brcmf_skbcb(skb)->htod_seq);
894 if (entry->send_tim_signal)
895 data_offset += 2 + BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP_LEN;
896 if (BRCMF_FWS_MODE_GET_REUSESEQ(fws->mode))
897 data_offset += BRCMF_FWS_TYPE_SEQ_LEN;
898 /* +2 is for Type[1] and Len[1] in TLV, plus TIM signal */
899 data_offset += 2 + BRCMF_FWS_TYPE_PKTTAG_LEN;
900 fillers = round_up(data_offset, 4) - data_offset;
901 data_offset += fillers;
902  
903 skb_push(skb, data_offset);
904 wlh = skb->data;
905  
906 wlh[0] = BRCMF_FWS_TYPE_PKTTAG;
907 wlh[1] = BRCMF_FWS_TYPE_PKTTAG_LEN;
908 memcpy(&wlh[2], &pkttag, sizeof(pkttag));
909 if (BRCMF_FWS_MODE_GET_REUSESEQ(fws->mode)) {
910 wlh[1] += BRCMF_FWS_TYPE_SEQ_LEN;
911 memcpy(&wlh[2 + BRCMF_FWS_TYPE_PKTTAG_LEN], &pktseq,
912 sizeof(pktseq));
913 }
914 wlh += wlh[1] + 2;
915  
916 if (entry->send_tim_signal) {
917 entry->send_tim_signal = 0;
918 wlh[0] = BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP;
919 wlh[1] = BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP_LEN;
920 wlh[2] = entry->mac_handle;
921 wlh[3] = entry->traffic_pending_bmp;
922 brcmf_dbg(TRACE, "adding TIM info: handle %d bmp 0x%X\n",
923 entry->mac_handle, entry->traffic_pending_bmp);
924 wlh += BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP_LEN + 2;
925 entry->traffic_lastreported_bmp = entry->traffic_pending_bmp;
926 }
927 if (fillers)
928 memset(wlh, BRCMF_FWS_TYPE_FILLER, fillers);
929  
930 return (u8)(data_offset >> 2);
931 }
932  
933 static bool brcmf_fws_tim_update(struct brcmf_fws_info *fws,
934 struct brcmf_fws_mac_descriptor *entry,
935 int fifo, bool send_immediately)
936 {
937 struct sk_buff *skb;
938 struct brcmf_skbuff_cb *skcb;
939 s32 err;
940 u32 len;
941 u8 data_offset;
942 int ifidx;
943  
944 /* check delayedQ and suppressQ in one call using bitmap */
945 if (brcmu_pktq_mlen(&entry->psq, 3 << (fifo * 2)) == 0)
946 entry->traffic_pending_bmp &= ~NBITVAL(fifo);
947 else
948 entry->traffic_pending_bmp |= NBITVAL(fifo);
949  
950 entry->send_tim_signal = false;
951 if (entry->traffic_lastreported_bmp != entry->traffic_pending_bmp)
952 entry->send_tim_signal = true;
953 if (send_immediately && entry->send_tim_signal &&
954 entry->state == BRCMF_FWS_STATE_CLOSE) {
955 /* create a dummy packet and sent that. The traffic */
956 /* bitmap info will automatically be attached to that packet */
957 len = BRCMF_FWS_TYPE_PKTTAG_LEN + 2 +
958 BRCMF_FWS_TYPE_SEQ_LEN +
959 BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP_LEN + 2 +
960 4 + fws->drvr->hdrlen;
961 skb = brcmu_pkt_buf_get_skb(len);
962 if (skb == NULL)
963 return false;
964 skb_pull(skb, len);
965 skcb = brcmf_skbcb(skb);
966 skcb->mac = entry;
967 skcb->state = BRCMF_FWS_SKBSTATE_TIM;
968 skcb->htod = 0;
969 skcb->htod_seq = 0;
970 data_offset = brcmf_fws_hdrpush(fws, skb);
971 ifidx = brcmf_skb_if_flags_get_field(skb, INDEX);
972 brcmf_fws_unlock(fws);
973 err = brcmf_proto_txdata(fws->drvr, ifidx, data_offset, skb);
974 brcmf_fws_lock(fws);
975 if (err)
976 brcmu_pkt_buf_free_skb(skb);
977 return true;
978 }
979 return false;
980 }
981  
982 static void
983 brcmf_fws_flow_control_check(struct brcmf_fws_info *fws, struct pktq *pq,
984 u8 if_id)
985 {
986 struct brcmf_if *ifp = brcmf_get_ifp(fws->drvr, if_id);
987  
988 if (WARN_ON(!ifp))
989 return;
990  
991 if ((ifp->netif_stop & BRCMF_NETIF_STOP_REASON_FWS_FC) &&
992 pq->len <= BRCMF_FWS_FLOWCONTROL_LOWATER)
993 brcmf_txflowblock_if(ifp,
994 BRCMF_NETIF_STOP_REASON_FWS_FC, false);
995 if (!(ifp->netif_stop & BRCMF_NETIF_STOP_REASON_FWS_FC) &&
996 pq->len >= BRCMF_FWS_FLOWCONTROL_HIWATER) {
997 fws->stats.fws_flow_block++;
998 brcmf_txflowblock_if(ifp, BRCMF_NETIF_STOP_REASON_FWS_FC, true);
999 }
1000 return;
1001 }
1002  
1003 static int brcmf_fws_rssi_indicate(struct brcmf_fws_info *fws, s8 rssi)
1004 {
1005 brcmf_dbg(CTL, "rssi %d\n", rssi);
1006 return 0;
1007 }
1008  
1009 static
1010 int brcmf_fws_macdesc_indicate(struct brcmf_fws_info *fws, u8 type, u8 *data)
1011 {
1012 struct brcmf_fws_mac_descriptor *entry, *existing;
1013 u8 mac_handle;
1014 u8 ifidx;
1015 u8 *addr;
1016  
1017 mac_handle = *data++;
1018 ifidx = *data++;
1019 addr = data;
1020  
1021 entry = &fws->desc.nodes[mac_handle & 0x1F];
1022 if (type == BRCMF_FWS_TYPE_MACDESC_DEL) {
1023 if (entry->occupied) {
1024 brcmf_dbg(TRACE, "deleting %s mac %pM\n",
1025 entry->name, addr);
1026 brcmf_fws_lock(fws);
1027 brcmf_fws_macdesc_cleanup(fws, entry, -1);
1028 brcmf_fws_macdesc_deinit(entry);
1029 brcmf_fws_unlock(fws);
1030 } else
1031 fws->stats.mac_update_failed++;
1032 return 0;
1033 }
1034  
1035 existing = brcmf_fws_macdesc_lookup(fws, addr);
1036 if (IS_ERR(existing)) {
1037 if (!entry->occupied) {
1038 brcmf_fws_lock(fws);
1039 entry->mac_handle = mac_handle;
1040 brcmf_fws_macdesc_init(entry, addr, ifidx);
1041 brcmf_fws_macdesc_set_name(fws, entry);
1042 brcmu_pktq_init(&entry->psq, BRCMF_FWS_PSQ_PREC_COUNT,
1043 BRCMF_FWS_PSQ_LEN);
1044 brcmf_fws_unlock(fws);
1045 brcmf_dbg(TRACE, "add %s mac %pM\n", entry->name, addr);
1046 } else {
1047 fws->stats.mac_update_failed++;
1048 }
1049 } else {
1050 if (entry != existing) {
1051 brcmf_dbg(TRACE, "copy mac %s\n", existing->name);
1052 brcmf_fws_lock(fws);
1053 memcpy(entry, existing,
1054 offsetof(struct brcmf_fws_mac_descriptor, psq));
1055 entry->mac_handle = mac_handle;
1056 brcmf_fws_macdesc_deinit(existing);
1057 brcmf_fws_macdesc_set_name(fws, entry);
1058 brcmf_fws_unlock(fws);
1059 brcmf_dbg(TRACE, "relocate %s mac %pM\n", entry->name,
1060 addr);
1061 } else {
1062 brcmf_dbg(TRACE, "use existing\n");
1063 WARN_ON(entry->mac_handle != mac_handle);
1064 /* TODO: what should we do here: continue, reinit, .. */
1065 }
1066 }
1067 return 0;
1068 }
1069  
1070 static int brcmf_fws_macdesc_state_indicate(struct brcmf_fws_info *fws,
1071 u8 type, u8 *data)
1072 {
1073 struct brcmf_fws_mac_descriptor *entry;
1074 u8 mac_handle;
1075 int ret;
1076  
1077 mac_handle = data[0];
1078 entry = &fws->desc.nodes[mac_handle & 0x1F];
1079 if (!entry->occupied) {
1080 fws->stats.mac_ps_update_failed++;
1081 return -ESRCH;
1082 }
1083 brcmf_fws_lock(fws);
1084 /* a state update should wipe old credits */
1085 entry->requested_credit = 0;
1086 entry->requested_packet = 0;
1087 if (type == BRCMF_FWS_TYPE_MAC_OPEN) {
1088 entry->state = BRCMF_FWS_STATE_OPEN;
1089 ret = BRCMF_FWS_RET_OK_SCHEDULE;
1090 } else {
1091 entry->state = BRCMF_FWS_STATE_CLOSE;
1092 brcmf_fws_tim_update(fws, entry, BRCMF_FWS_FIFO_AC_BK, false);
1093 brcmf_fws_tim_update(fws, entry, BRCMF_FWS_FIFO_AC_BE, false);
1094 brcmf_fws_tim_update(fws, entry, BRCMF_FWS_FIFO_AC_VI, false);
1095 brcmf_fws_tim_update(fws, entry, BRCMF_FWS_FIFO_AC_VO, true);
1096 ret = BRCMF_FWS_RET_OK_NOSCHEDULE;
1097 }
1098 brcmf_fws_unlock(fws);
1099 return ret;
1100 }
1101  
1102 static int brcmf_fws_interface_state_indicate(struct brcmf_fws_info *fws,
1103 u8 type, u8 *data)
1104 {
1105 struct brcmf_fws_mac_descriptor *entry;
1106 u8 ifidx;
1107 int ret;
1108  
1109 ifidx = data[0];
1110  
1111 if (ifidx >= BRCMF_MAX_IFS) {
1112 ret = -ERANGE;
1113 goto fail;
1114 }
1115  
1116 entry = &fws->desc.iface[ifidx];
1117 if (!entry->occupied) {
1118 ret = -ESRCH;
1119 goto fail;
1120 }
1121  
1122 brcmf_dbg(TRACE, "%s (%d): %s\n", brcmf_fws_get_tlv_name(type), type,
1123 entry->name);
1124 brcmf_fws_lock(fws);
1125 switch (type) {
1126 case BRCMF_FWS_TYPE_INTERFACE_OPEN:
1127 entry->state = BRCMF_FWS_STATE_OPEN;
1128 ret = BRCMF_FWS_RET_OK_SCHEDULE;
1129 break;
1130 case BRCMF_FWS_TYPE_INTERFACE_CLOSE:
1131 entry->state = BRCMF_FWS_STATE_CLOSE;
1132 ret = BRCMF_FWS_RET_OK_NOSCHEDULE;
1133 break;
1134 default:
1135 ret = -EINVAL;
1136 brcmf_fws_unlock(fws);
1137 goto fail;
1138 }
1139 brcmf_fws_unlock(fws);
1140 return ret;
1141  
1142 fail:
1143 fws->stats.if_update_failed++;
1144 return ret;
1145 }
1146  
1147 static int brcmf_fws_request_indicate(struct brcmf_fws_info *fws, u8 type,
1148 u8 *data)
1149 {
1150 struct brcmf_fws_mac_descriptor *entry;
1151  
1152 entry = &fws->desc.nodes[data[1] & 0x1F];
1153 if (!entry->occupied) {
1154 if (type == BRCMF_FWS_TYPE_MAC_REQUEST_CREDIT)
1155 fws->stats.credit_request_failed++;
1156 else
1157 fws->stats.packet_request_failed++;
1158 return -ESRCH;
1159 }
1160  
1161 brcmf_dbg(TRACE, "%s (%d): %s cnt %d bmp %d\n",
1162 brcmf_fws_get_tlv_name(type), type, entry->name,
1163 data[0], data[2]);
1164 brcmf_fws_lock(fws);
1165 if (type == BRCMF_FWS_TYPE_MAC_REQUEST_CREDIT)
1166 entry->requested_credit = data[0];
1167 else
1168 entry->requested_packet = data[0];
1169  
1170 entry->ac_bitmap = data[2];
1171 brcmf_fws_unlock(fws);
1172 return BRCMF_FWS_RET_OK_SCHEDULE;
1173 }
1174  
1175 static void
1176 brcmf_fws_macdesc_use_req_credit(struct brcmf_fws_mac_descriptor *entry,
1177 struct sk_buff *skb)
1178 {
1179 if (entry->requested_credit > 0) {
1180 entry->requested_credit--;
1181 brcmf_skb_if_flags_set_field(skb, REQUESTED, 1);
1182 brcmf_skb_if_flags_set_field(skb, REQ_CREDIT, 1);
1183 if (entry->state != BRCMF_FWS_STATE_CLOSE)
1184 brcmf_err("requested credit set while mac not closed!\n");
1185 } else if (entry->requested_packet > 0) {
1186 entry->requested_packet--;
1187 brcmf_skb_if_flags_set_field(skb, REQUESTED, 1);
1188 brcmf_skb_if_flags_set_field(skb, REQ_CREDIT, 0);
1189 if (entry->state != BRCMF_FWS_STATE_CLOSE)
1190 brcmf_err("requested packet set while mac not closed!\n");
1191 } else {
1192 brcmf_skb_if_flags_set_field(skb, REQUESTED, 0);
1193 brcmf_skb_if_flags_set_field(skb, REQ_CREDIT, 0);
1194 }
1195 }
1196  
1197 static void brcmf_fws_macdesc_return_req_credit(struct sk_buff *skb)
1198 {
1199 struct brcmf_fws_mac_descriptor *entry = brcmf_skbcb(skb)->mac;
1200  
1201 if ((brcmf_skb_if_flags_get_field(skb, REQ_CREDIT)) &&
1202 (entry->state == BRCMF_FWS_STATE_CLOSE))
1203 entry->requested_credit++;
1204 }
1205  
1206 static void brcmf_fws_return_credits(struct brcmf_fws_info *fws,
1207 u8 fifo, u8 credits)
1208 {
1209 int lender_ac;
1210 int *borrowed;
1211 int *fifo_credit;
1212  
1213 if (!credits)
1214 return;
1215  
1216 fws->fifo_credit_map |= 1 << fifo;
1217  
1218 if ((fifo == BRCMF_FWS_FIFO_AC_BE) &&
1219 (fws->credits_borrowed[0])) {
1220 for (lender_ac = BRCMF_FWS_FIFO_AC_VO; lender_ac >= 0;
1221 lender_ac--) {
1222 borrowed = &fws->credits_borrowed[lender_ac];
1223 if (*borrowed) {
1224 fws->fifo_credit_map |= (1 << lender_ac);
1225 fifo_credit = &fws->fifo_credit[lender_ac];
1226 if (*borrowed >= credits) {
1227 *borrowed -= credits;
1228 *fifo_credit += credits;
1229 return;
1230 } else {
1231 credits -= *borrowed;
1232 *fifo_credit += *borrowed;
1233 *borrowed = 0;
1234 }
1235 }
1236 }
1237 }
1238  
1239 fws->fifo_credit[fifo] += credits;
1240 }
1241  
1242 static void brcmf_fws_schedule_deq(struct brcmf_fws_info *fws)
1243 {
1244 /* only schedule dequeue when there are credits for delayed traffic */
1245 if ((fws->fifo_credit_map & fws->fifo_delay_map) ||
1246 (!brcmf_fws_fc_active(fws) && fws->fifo_delay_map))
1247 queue_work(fws->fws_wq, &fws->fws_dequeue_work);
1248 }
1249  
1250 static int brcmf_fws_enq(struct brcmf_fws_info *fws,
1251 enum brcmf_fws_skb_state state, int fifo,
1252 struct sk_buff *p)
1253 {
1254 int prec = 2 * fifo;
1255 u32 *qfull_stat = &fws->stats.delayq_full_error;
1256 struct brcmf_fws_mac_descriptor *entry;
1257 struct pktq *pq;
1258 struct sk_buff_head *queue;
1259 struct sk_buff *p_head;
1260 struct sk_buff *p_tail;
1261 u32 fr_new;
1262 u32 fr_compare;
1263  
1264 entry = brcmf_skbcb(p)->mac;
1265 if (entry == NULL) {
1266 brcmf_err("no mac descriptor found for skb %p\n", p);
1267 return -ENOENT;
1268 }
1269  
1270 brcmf_dbg(DATA, "enter: fifo %d skb %p\n", fifo, p);
1271 if (state == BRCMF_FWS_SKBSTATE_SUPPRESSED) {
1272 prec += 1;
1273 qfull_stat = &fws->stats.supprq_full_error;
1274  
1275 /* Fix out of order delivery of frames. Dont assume frame */
1276 /* can be inserted at the end, but look for correct position */
1277 pq = &entry->psq;
1278 if (pktq_full(pq) || pktq_pfull(pq, prec)) {
1279 *qfull_stat += 1;
1280 return -ENFILE;
1281 }
1282 queue = &pq->q[prec].skblist;
1283  
1284 p_head = skb_peek(queue);
1285 p_tail = skb_peek_tail(queue);
1286 fr_new = brcmf_skb_htod_tag_get_field(p, FREERUN);
1287  
1288 while (p_head != p_tail) {
1289 fr_compare = brcmf_skb_htod_tag_get_field(p_tail,
1290 FREERUN);
1291 /* be sure to handle wrap of 256 */
1292 if (((fr_new > fr_compare) &&
1293 ((fr_new - fr_compare) < 128)) ||
1294 ((fr_new < fr_compare) &&
1295 ((fr_compare - fr_new) > 128)))
1296 break;
1297 p_tail = skb_queue_prev(queue, p_tail);
1298 }
1299 /* Position found. Determine what to do */
1300 if (p_tail == NULL) {
1301 /* empty list */
1302 __skb_queue_tail(queue, p);
1303 } else {
1304 fr_compare = brcmf_skb_htod_tag_get_field(p_tail,
1305 FREERUN);
1306 if (((fr_new > fr_compare) &&
1307 ((fr_new - fr_compare) < 128)) ||
1308 ((fr_new < fr_compare) &&
1309 ((fr_compare - fr_new) > 128))) {
1310 /* After tail */
1311 __skb_queue_after(queue, p_tail, p);
1312 } else {
1313 /* Before tail */
1314 __skb_insert(p, p_tail->prev, p_tail, queue);
1315 }
1316 }
1317  
1318 /* Complete the counters and statistics */
1319 pq->len++;
1320 if (pq->hi_prec < prec)
1321 pq->hi_prec = (u8) prec;
1322 } else if (brcmu_pktq_penq(&entry->psq, prec, p) == NULL) {
1323 *qfull_stat += 1;
1324 return -ENFILE;
1325 }
1326  
1327 /* increment total enqueued packet count */
1328 fws->fifo_delay_map |= 1 << fifo;
1329 fws->fifo_enqpkt[fifo]++;
1330  
1331 /* update the sk_buff state */
1332 brcmf_skbcb(p)->state = state;
1333  
1334 /*
1335 * A packet has been pushed so update traffic
1336 * availability bitmap, if applicable
1337 */
1338 brcmf_fws_tim_update(fws, entry, fifo, true);
1339 brcmf_fws_flow_control_check(fws, &entry->psq,
1340 brcmf_skb_if_flags_get_field(p, INDEX));
1341 return 0;
1342 }
1343  
1344 static struct sk_buff *brcmf_fws_deq(struct brcmf_fws_info *fws, int fifo)
1345 {
1346 struct brcmf_fws_mac_descriptor *table;
1347 struct brcmf_fws_mac_descriptor *entry;
1348 struct sk_buff *p;
1349 int num_nodes;
1350 int node_pos;
1351 int prec_out;
1352 int pmsk;
1353 int i;
1354  
1355 table = (struct brcmf_fws_mac_descriptor *)&fws->desc;
1356 num_nodes = sizeof(fws->desc) / sizeof(struct brcmf_fws_mac_descriptor);
1357 node_pos = fws->deq_node_pos[fifo];
1358  
1359 for (i = 0; i < num_nodes; i++) {
1360 entry = &table[(node_pos + i) % num_nodes];
1361 if (!entry->occupied ||
1362 brcmf_fws_macdesc_closed(fws, entry, fifo))
1363 continue;
1364  
1365 if (entry->suppressed)
1366 pmsk = 2;
1367 else
1368 pmsk = 3;
1369 p = brcmu_pktq_mdeq(&entry->psq, pmsk << (fifo * 2), &prec_out);
1370 if (p == NULL) {
1371 if (entry->suppressed) {
1372 if (entry->suppr_transit_count)
1373 continue;
1374 entry->suppressed = false;
1375 p = brcmu_pktq_mdeq(&entry->psq,
1376 1 << (fifo * 2), &prec_out);
1377 }
1378 }
1379 if (p == NULL)
1380 continue;
1381  
1382 brcmf_fws_macdesc_use_req_credit(entry, p);
1383  
1384 /* move dequeue position to ensure fair round-robin */
1385 fws->deq_node_pos[fifo] = (node_pos + i + 1) % num_nodes;
1386 brcmf_fws_flow_control_check(fws, &entry->psq,
1387 brcmf_skb_if_flags_get_field(p,
1388 INDEX)
1389 );
1390 /*
1391 * A packet has been picked up, update traffic
1392 * availability bitmap, if applicable
1393 */
1394 brcmf_fws_tim_update(fws, entry, fifo, false);
1395  
1396 /*
1397 * decrement total enqueued fifo packets and
1398 * clear delay bitmap if done.
1399 */
1400 fws->fifo_enqpkt[fifo]--;
1401 if (fws->fifo_enqpkt[fifo] == 0)
1402 fws->fifo_delay_map &= ~(1 << fifo);
1403 goto done;
1404 }
1405 p = NULL;
1406 done:
1407 brcmf_dbg(DATA, "exit: fifo %d skb %p\n", fifo, p);
1408 return p;
1409 }
1410  
1411 static int brcmf_fws_txstatus_suppressed(struct brcmf_fws_info *fws, int fifo,
1412 struct sk_buff *skb,
1413 u32 genbit, u16 seq)
1414 {
1415 struct brcmf_fws_mac_descriptor *entry = brcmf_skbcb(skb)->mac;
1416 u32 hslot;
1417 int ret;
1418  
1419 hslot = brcmf_skb_htod_tag_get_field(skb, HSLOT);
1420  
1421 /* this packet was suppressed */
1422 if (!entry->suppressed) {
1423 entry->suppressed = true;
1424 entry->suppr_transit_count = entry->transit_count;
1425 brcmf_dbg(DATA, "suppress %s: transit %d\n",
1426 entry->name, entry->transit_count);
1427 }
1428  
1429 entry->generation = genbit;
1430  
1431 brcmf_skb_htod_tag_set_field(skb, GENERATION, genbit);
1432 brcmf_skbcb(skb)->htod_seq = seq;
1433 if (brcmf_skb_htod_seq_get_field(skb, FROMFW)) {
1434 brcmf_skb_htod_seq_set_field(skb, FROMDRV, 1);
1435 brcmf_skb_htod_seq_set_field(skb, FROMFW, 0);
1436 } else {
1437 brcmf_skb_htod_seq_set_field(skb, FROMDRV, 0);
1438 }
1439 ret = brcmf_fws_enq(fws, BRCMF_FWS_SKBSTATE_SUPPRESSED, fifo, skb);
1440  
1441 if (ret != 0) {
1442 /* suppress q is full drop this packet */
1443 brcmf_fws_hanger_poppkt(&fws->hanger, hslot, &skb, true);
1444 } else {
1445 /* Mark suppressed to avoid a double free during wlfc cleanup */
1446 brcmf_fws_hanger_mark_suppressed(&fws->hanger, hslot);
1447 }
1448  
1449 return ret;
1450 }
1451  
1452 static int
1453 brcmf_fws_txs_process(struct brcmf_fws_info *fws, u8 flags, u32 hslot,
1454 u32 genbit, u16 seq)
1455 {
1456 u32 fifo;
1457 int ret;
1458 bool remove_from_hanger = true;
1459 struct sk_buff *skb;
1460 struct brcmf_skbuff_cb *skcb;
1461 struct brcmf_fws_mac_descriptor *entry = NULL;
1462 struct brcmf_if *ifp;
1463  
1464 brcmf_dbg(DATA, "flags %d\n", flags);
1465  
1466 if (flags == BRCMF_FWS_TXSTATUS_DISCARD)
1467 fws->stats.txs_discard++;
1468 else if (flags == BRCMF_FWS_TXSTATUS_CORE_SUPPRESS) {
1469 fws->stats.txs_supp_core++;
1470 remove_from_hanger = false;
1471 } else if (flags == BRCMF_FWS_TXSTATUS_FW_PS_SUPPRESS) {
1472 fws->stats.txs_supp_ps++;
1473 remove_from_hanger = false;
1474 } else if (flags == BRCMF_FWS_TXSTATUS_FW_TOSSED)
1475 fws->stats.txs_tossed++;
1476 else if (flags == BRCMF_FWS_TXSTATUS_HOST_TOSSED)
1477 fws->stats.txs_host_tossed++;
1478 else
1479 brcmf_err("unexpected txstatus\n");
1480  
1481 ret = brcmf_fws_hanger_poppkt(&fws->hanger, hslot, &skb,
1482 remove_from_hanger);
1483 if (ret != 0) {
1484 brcmf_err("no packet in hanger slot: hslot=%d\n", hslot);
1485 return ret;
1486 }
1487  
1488 skcb = brcmf_skbcb(skb);
1489 entry = skcb->mac;
1490 if (WARN_ON(!entry)) {
1491 brcmu_pkt_buf_free_skb(skb);
1492 return -EINVAL;
1493 }
1494 entry->transit_count--;
1495 if (entry->suppressed && entry->suppr_transit_count)
1496 entry->suppr_transit_count--;
1497  
1498 brcmf_dbg(DATA, "%s flags %d htod %X seq %X\n", entry->name, flags,
1499 skcb->htod, seq);
1500  
1501 /* pick up the implicit credit from this packet */
1502 fifo = brcmf_skb_htod_tag_get_field(skb, FIFO);
1503 if ((fws->fcmode == BRCMF_FWS_FCMODE_IMPLIED_CREDIT) ||
1504 (brcmf_skb_if_flags_get_field(skb, REQ_CREDIT)) ||
1505 (flags == BRCMF_FWS_TXSTATUS_HOST_TOSSED)) {
1506 brcmf_fws_return_credits(fws, fifo, 1);
1507 brcmf_fws_schedule_deq(fws);
1508 }
1509 brcmf_fws_macdesc_return_req_credit(skb);
1510  
1511 ret = brcmf_proto_hdrpull(fws->drvr, false, skb, &ifp);
1512 if (ret) {
1513 brcmu_pkt_buf_free_skb(skb);
1514 return -EINVAL;
1515 }
1516 if (!remove_from_hanger)
1517 ret = brcmf_fws_txstatus_suppressed(fws, fifo, skb,
1518 genbit, seq);
1519 if (remove_from_hanger || ret)
1520 brcmf_txfinalize(ifp, skb, true);
1521  
1522 return 0;
1523 }
1524  
1525 static int brcmf_fws_fifocreditback_indicate(struct brcmf_fws_info *fws,
1526 u8 *data)
1527 {
1528 int i;
1529  
1530 if (fws->fcmode != BRCMF_FWS_FCMODE_EXPLICIT_CREDIT) {
1531 brcmf_dbg(INFO, "ignored\n");
1532 return BRCMF_FWS_RET_OK_NOSCHEDULE;
1533 }
1534  
1535 brcmf_dbg(DATA, "enter: data %pM\n", data);
1536 brcmf_fws_lock(fws);
1537 for (i = 0; i < BRCMF_FWS_FIFO_COUNT; i++)
1538 brcmf_fws_return_credits(fws, i, data[i]);
1539  
1540 brcmf_dbg(DATA, "map: credit %x delay %x\n", fws->fifo_credit_map,
1541 fws->fifo_delay_map);
1542 brcmf_fws_unlock(fws);
1543 return BRCMF_FWS_RET_OK_SCHEDULE;
1544 }
1545  
1546 static int brcmf_fws_txstatus_indicate(struct brcmf_fws_info *fws, u8 *data)
1547 {
1548 __le32 status_le;
1549 __le16 seq_le;
1550 u32 status;
1551 u32 hslot;
1552 u32 genbit;
1553 u8 flags;
1554 u16 seq;
1555  
1556 fws->stats.txs_indicate++;
1557 memcpy(&status_le, data, sizeof(status_le));
1558 status = le32_to_cpu(status_le);
1559 flags = brcmf_txstatus_get_field(status, FLAGS);
1560 hslot = brcmf_txstatus_get_field(status, HSLOT);
1561 genbit = brcmf_txstatus_get_field(status, GENERATION);
1562 if (BRCMF_FWS_MODE_GET_REUSESEQ(fws->mode)) {
1563 memcpy(&seq_le, &data[BRCMF_FWS_TYPE_PKTTAG_LEN],
1564 sizeof(seq_le));
1565 seq = le16_to_cpu(seq_le);
1566 } else {
1567 seq = 0;
1568 }
1569  
1570 brcmf_fws_lock(fws);
1571 brcmf_fws_txs_process(fws, flags, hslot, genbit, seq);
1572 brcmf_fws_unlock(fws);
1573 return BRCMF_FWS_RET_OK_NOSCHEDULE;
1574 }
1575  
1576 static int brcmf_fws_dbg_seqnum_check(struct brcmf_fws_info *fws, u8 *data)
1577 {
1578 __le32 timestamp;
1579  
1580 memcpy(&timestamp, &data[2], sizeof(timestamp));
1581 brcmf_dbg(CTL, "received: seq %d, timestamp %d\n", data[1],
1582 le32_to_cpu(timestamp));
1583 return 0;
1584 }
1585  
1586 static int brcmf_fws_notify_credit_map(struct brcmf_if *ifp,
1587 const struct brcmf_event_msg *e,
1588 void *data)
1589 {
1590 struct brcmf_fws_info *fws = drvr_to_fws(ifp->drvr);
1591 int i;
1592 u8 *credits = data;
1593  
1594 if (e->datalen < BRCMF_FWS_FIFO_COUNT) {
1595 brcmf_err("event payload too small (%d)\n", e->datalen);
1596 return -EINVAL;
1597 }
1598 if (fws->creditmap_received)
1599 return 0;
1600  
1601 fws->creditmap_received = true;
1602  
1603 brcmf_dbg(TRACE, "enter: credits %pM\n", credits);
1604 brcmf_fws_lock(fws);
1605 for (i = 0; i < ARRAY_SIZE(fws->fifo_credit); i++) {
1606 if (*credits)
1607 fws->fifo_credit_map |= 1 << i;
1608 else
1609 fws->fifo_credit_map &= ~(1 << i);
1610 fws->fifo_credit[i] = *credits++;
1611 }
1612 brcmf_fws_schedule_deq(fws);
1613 brcmf_fws_unlock(fws);
1614 return 0;
1615 }
1616  
1617 static int brcmf_fws_notify_bcmc_credit_support(struct brcmf_if *ifp,
1618 const struct brcmf_event_msg *e,
1619 void *data)
1620 {
1621 struct brcmf_fws_info *fws = drvr_to_fws(ifp->drvr);
1622  
1623 if (fws) {
1624 brcmf_fws_lock(fws);
1625 fws->bcmc_credit_check = true;
1626 brcmf_fws_unlock(fws);
1627 }
1628 return 0;
1629 }
1630  
1631 static void brcmf_rxreorder_get_skb_list(struct brcmf_ampdu_rx_reorder *rfi,
1632 u8 start, u8 end,
1633 struct sk_buff_head *skb_list)
1634 {
1635 /* initialize return list */
1636 __skb_queue_head_init(skb_list);
1637  
1638 if (rfi->pend_pkts == 0) {
1639 brcmf_dbg(INFO, "no packets in reorder queue\n");
1640 return;
1641 }
1642  
1643 do {
1644 if (rfi->pktslots[start]) {
1645 __skb_queue_tail(skb_list, rfi->pktslots[start]);
1646 rfi->pktslots[start] = NULL;
1647 }
1648 start++;
1649 if (start > rfi->max_idx)
1650 start = 0;
1651 } while (start != end);
1652 rfi->pend_pkts -= skb_queue_len(skb_list);
1653 }
1654  
1655 void brcmf_fws_rxreorder(struct brcmf_if *ifp, struct sk_buff *pkt)
1656 {
1657 u8 *reorder_data;
1658 u8 flow_id, max_idx, cur_idx, exp_idx, end_idx;
1659 struct brcmf_ampdu_rx_reorder *rfi;
1660 struct sk_buff_head reorder_list;
1661 struct sk_buff *pnext;
1662 u8 flags;
1663 u32 buf_size;
1664  
1665 reorder_data = ((struct brcmf_skb_reorder_data *)pkt->cb)->reorder;
1666 flow_id = reorder_data[BRCMF_RXREORDER_FLOWID_OFFSET];
1667 flags = reorder_data[BRCMF_RXREORDER_FLAGS_OFFSET];
1668  
1669 /* validate flags and flow id */
1670 if (flags == 0xFF) {
1671 brcmf_err("invalid flags...so ignore this packet\n");
1672 brcmf_netif_rx(ifp, pkt);
1673 return;
1674 }
1675  
1676 rfi = ifp->drvr->reorder_flows[flow_id];
1677 if (flags & BRCMF_RXREORDER_DEL_FLOW) {
1678 brcmf_dbg(INFO, "flow-%d: delete\n",
1679 flow_id);
1680  
1681 if (rfi == NULL) {
1682 brcmf_dbg(INFO, "received flags to cleanup, but no flow (%d) yet\n",
1683 flow_id);
1684 brcmf_netif_rx(ifp, pkt);
1685 return;
1686 }
1687  
1688 brcmf_rxreorder_get_skb_list(rfi, rfi->exp_idx, rfi->exp_idx,
1689 &reorder_list);
1690 /* add the last packet */
1691 __skb_queue_tail(&reorder_list, pkt);
1692 kfree(rfi);
1693 ifp->drvr->reorder_flows[flow_id] = NULL;
1694 goto netif_rx;
1695 }
1696 /* from here on we need a flow reorder instance */
1697 if (rfi == NULL) {
1698 buf_size = sizeof(*rfi);
1699 max_idx = reorder_data[BRCMF_RXREORDER_MAXIDX_OFFSET];
1700  
1701 buf_size += (max_idx + 1) * sizeof(pkt);
1702  
1703 /* allocate space for flow reorder info */
1704 brcmf_dbg(INFO, "flow-%d: start, maxidx %d\n",
1705 flow_id, max_idx);
1706 rfi = kzalloc(buf_size, GFP_ATOMIC);
1707 if (rfi == NULL) {
1708 brcmf_err("failed to alloc buffer\n");
1709 brcmf_netif_rx(ifp, pkt);
1710 return;
1711 }
1712  
1713 ifp->drvr->reorder_flows[flow_id] = rfi;
1714 rfi->pktslots = (struct sk_buff **)(rfi + 1);
1715 rfi->max_idx = max_idx;
1716 }
1717 if (flags & BRCMF_RXREORDER_NEW_HOLE) {
1718 if (rfi->pend_pkts) {
1719 brcmf_rxreorder_get_skb_list(rfi, rfi->exp_idx,
1720 rfi->exp_idx,
1721 &reorder_list);
1722 WARN_ON(rfi->pend_pkts);
1723 } else {
1724 __skb_queue_head_init(&reorder_list);
1725 }
1726 rfi->cur_idx = reorder_data[BRCMF_RXREORDER_CURIDX_OFFSET];
1727 rfi->exp_idx = reorder_data[BRCMF_RXREORDER_EXPIDX_OFFSET];
1728 rfi->max_idx = reorder_data[BRCMF_RXREORDER_MAXIDX_OFFSET];
1729 rfi->pktslots[rfi->cur_idx] = pkt;
1730 rfi->pend_pkts++;
1731 brcmf_dbg(DATA, "flow-%d: new hole %d (%d), pending %d\n",
1732 flow_id, rfi->cur_idx, rfi->exp_idx, rfi->pend_pkts);
1733 } else if (flags & BRCMF_RXREORDER_CURIDX_VALID) {
1734 cur_idx = reorder_data[BRCMF_RXREORDER_CURIDX_OFFSET];
1735 exp_idx = reorder_data[BRCMF_RXREORDER_EXPIDX_OFFSET];
1736  
1737 if ((exp_idx == rfi->exp_idx) && (cur_idx != rfi->exp_idx)) {
1738 /* still in the current hole */
1739 /* enqueue the current on the buffer chain */
1740 if (rfi->pktslots[cur_idx] != NULL) {
1741 brcmf_dbg(INFO, "HOLE: ERROR buffer pending..free it\n");
1742 brcmu_pkt_buf_free_skb(rfi->pktslots[cur_idx]);
1743 rfi->pktslots[cur_idx] = NULL;
1744 }
1745 rfi->pktslots[cur_idx] = pkt;
1746 rfi->pend_pkts++;
1747 rfi->cur_idx = cur_idx;
1748 brcmf_dbg(DATA, "flow-%d: store pkt %d (%d), pending %d\n",
1749 flow_id, cur_idx, exp_idx, rfi->pend_pkts);
1750  
1751 /* can return now as there is no reorder
1752 * list to process.
1753 */
1754 return;
1755 }
1756 if (rfi->exp_idx == cur_idx) {
1757 if (rfi->pktslots[cur_idx] != NULL) {
1758 brcmf_dbg(INFO, "error buffer pending..free it\n");
1759 brcmu_pkt_buf_free_skb(rfi->pktslots[cur_idx]);
1760 rfi->pktslots[cur_idx] = NULL;
1761 }
1762 rfi->pktslots[cur_idx] = pkt;
1763 rfi->pend_pkts++;
1764  
1765 /* got the expected one. flush from current to expected
1766 * and update expected
1767 */
1768 brcmf_dbg(DATA, "flow-%d: expected %d (%d), pending %d\n",
1769 flow_id, cur_idx, exp_idx, rfi->pend_pkts);
1770  
1771 rfi->cur_idx = cur_idx;
1772 rfi->exp_idx = exp_idx;
1773  
1774 brcmf_rxreorder_get_skb_list(rfi, cur_idx, exp_idx,
1775 &reorder_list);
1776 brcmf_dbg(DATA, "flow-%d: freeing buffers %d, pending %d\n",
1777 flow_id, skb_queue_len(&reorder_list),
1778 rfi->pend_pkts);
1779 } else {
1780 u8 end_idx;
1781  
1782 brcmf_dbg(DATA, "flow-%d (0x%x): both moved, old %d/%d, new %d/%d\n",
1783 flow_id, flags, rfi->cur_idx, rfi->exp_idx,
1784 cur_idx, exp_idx);
1785 if (flags & BRCMF_RXREORDER_FLUSH_ALL)
1786 end_idx = rfi->exp_idx;
1787 else
1788 end_idx = exp_idx;
1789  
1790 /* flush pkts first */
1791 brcmf_rxreorder_get_skb_list(rfi, rfi->exp_idx, end_idx,
1792 &reorder_list);
1793  
1794 if (exp_idx == ((cur_idx + 1) % (rfi->max_idx + 1))) {
1795 __skb_queue_tail(&reorder_list, pkt);
1796 } else {
1797 rfi->pktslots[cur_idx] = pkt;
1798 rfi->pend_pkts++;
1799 }
1800 rfi->exp_idx = exp_idx;
1801 rfi->cur_idx = cur_idx;
1802 }
1803 } else {
1804 /* explicity window move updating the expected index */
1805 exp_idx = reorder_data[BRCMF_RXREORDER_EXPIDX_OFFSET];
1806  
1807 brcmf_dbg(DATA, "flow-%d (0x%x): change expected: %d -> %d\n",
1808 flow_id, flags, rfi->exp_idx, exp_idx);
1809 if (flags & BRCMF_RXREORDER_FLUSH_ALL)
1810 end_idx = rfi->exp_idx;
1811 else
1812 end_idx = exp_idx;
1813  
1814 brcmf_rxreorder_get_skb_list(rfi, rfi->exp_idx, end_idx,
1815 &reorder_list);
1816 __skb_queue_tail(&reorder_list, pkt);
1817 /* set the new expected idx */
1818 rfi->exp_idx = exp_idx;
1819 }
1820 netif_rx:
1821 skb_queue_walk_safe(&reorder_list, pkt, pnext) {
1822 __skb_unlink(pkt, &reorder_list);
1823 brcmf_netif_rx(ifp, pkt);
1824 }
1825 }
1826  
1827 void brcmf_fws_hdrpull(struct brcmf_if *ifp, s16 siglen, struct sk_buff *skb)
1828 {
1829 struct brcmf_skb_reorder_data *rd;
1830 struct brcmf_fws_info *fws = drvr_to_fws(ifp->drvr);
1831 u8 *signal_data;
1832 s16 data_len;
1833 u8 type;
1834 u8 len;
1835 u8 *data;
1836 s32 status;
1837 s32 err;
1838  
1839 brcmf_dbg(HDRS, "enter: ifidx %d, skblen %u, sig %d\n",
1840 ifp->ifidx, skb->len, siglen);
1841  
1842 WARN_ON(siglen > skb->len);
1843  
1844 if (!siglen)
1845 return;
1846 /* if flow control disabled, skip to packet data and leave */
1847 if ((!fws) || (!fws->fw_signals)) {
1848 skb_pull(skb, siglen);
1849 return;
1850 }
1851  
1852 fws->stats.header_pulls++;
1853 data_len = siglen;
1854 signal_data = skb->data;
1855  
1856 status = BRCMF_FWS_RET_OK_NOSCHEDULE;
1857 while (data_len > 0) {
1858 /* extract tlv info */
1859 type = signal_data[0];
1860  
1861 /* FILLER type is actually not a TLV, but
1862 * a single byte that can be skipped.
1863 */
1864 if (type == BRCMF_FWS_TYPE_FILLER) {
1865 signal_data += 1;
1866 data_len -= 1;
1867 continue;
1868 }
1869 len = signal_data[1];
1870 data = signal_data + 2;
1871  
1872 brcmf_dbg(HDRS, "tlv type=%s (%d), len=%d (%d)\n",
1873 brcmf_fws_get_tlv_name(type), type, len,
1874 brcmf_fws_get_tlv_len(fws, type));
1875  
1876 /* abort parsing when length invalid */
1877 if (data_len < len + 2)
1878 break;
1879  
1880 if (len < brcmf_fws_get_tlv_len(fws, type))
1881 break;
1882  
1883 err = BRCMF_FWS_RET_OK_NOSCHEDULE;
1884 switch (type) {
1885 case BRCMF_FWS_TYPE_COMP_TXSTATUS:
1886 break;
1887 case BRCMF_FWS_TYPE_HOST_REORDER_RXPKTS:
1888 rd = (struct brcmf_skb_reorder_data *)skb->cb;
1889 rd->reorder = data;
1890 break;
1891 case BRCMF_FWS_TYPE_MACDESC_ADD:
1892 case BRCMF_FWS_TYPE_MACDESC_DEL:
1893 brcmf_fws_macdesc_indicate(fws, type, data);
1894 break;
1895 case BRCMF_FWS_TYPE_MAC_OPEN:
1896 case BRCMF_FWS_TYPE_MAC_CLOSE:
1897 err = brcmf_fws_macdesc_state_indicate(fws, type, data);
1898 break;
1899 case BRCMF_FWS_TYPE_INTERFACE_OPEN:
1900 case BRCMF_FWS_TYPE_INTERFACE_CLOSE:
1901 err = brcmf_fws_interface_state_indicate(fws, type,
1902 data);
1903 break;
1904 case BRCMF_FWS_TYPE_MAC_REQUEST_CREDIT:
1905 case BRCMF_FWS_TYPE_MAC_REQUEST_PACKET:
1906 err = brcmf_fws_request_indicate(fws, type, data);
1907 break;
1908 case BRCMF_FWS_TYPE_TXSTATUS:
1909 brcmf_fws_txstatus_indicate(fws, data);
1910 break;
1911 case BRCMF_FWS_TYPE_FIFO_CREDITBACK:
1912 err = brcmf_fws_fifocreditback_indicate(fws, data);
1913 break;
1914 case BRCMF_FWS_TYPE_RSSI:
1915 brcmf_fws_rssi_indicate(fws, *data);
1916 break;
1917 case BRCMF_FWS_TYPE_TRANS_ID:
1918 brcmf_fws_dbg_seqnum_check(fws, data);
1919 break;
1920 case BRCMF_FWS_TYPE_PKTTAG:
1921 case BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP:
1922 default:
1923 fws->stats.tlv_invalid_type++;
1924 break;
1925 }
1926 if (err == BRCMF_FWS_RET_OK_SCHEDULE)
1927 status = BRCMF_FWS_RET_OK_SCHEDULE;
1928 signal_data += len + 2;
1929 data_len -= len + 2;
1930 }
1931  
1932 if (data_len != 0)
1933 fws->stats.tlv_parse_failed++;
1934  
1935 if (status == BRCMF_FWS_RET_OK_SCHEDULE)
1936 brcmf_fws_schedule_deq(fws);
1937  
1938 /* signalling processing result does
1939 * not affect the actual ethernet packet.
1940 */
1941 skb_pull(skb, siglen);
1942  
1943 /* this may be a signal-only packet
1944 */
1945 if (skb->len == 0)
1946 fws->stats.header_only_pkt++;
1947 }
1948  
1949 static u8 brcmf_fws_precommit_skb(struct brcmf_fws_info *fws, int fifo,
1950 struct sk_buff *p)
1951 {
1952 struct brcmf_skbuff_cb *skcb = brcmf_skbcb(p);
1953 struct brcmf_fws_mac_descriptor *entry = skcb->mac;
1954 u8 flags;
1955  
1956 if (skcb->state != BRCMF_FWS_SKBSTATE_SUPPRESSED)
1957 brcmf_skb_htod_tag_set_field(p, GENERATION, entry->generation);
1958 flags = BRCMF_FWS_HTOD_FLAG_PKTFROMHOST;
1959 if (brcmf_skb_if_flags_get_field(p, REQUESTED)) {
1960 /*
1961 * Indicate that this packet is being sent in response to an
1962 * explicit request from the firmware side.
1963 */
1964 flags |= BRCMF_FWS_HTOD_FLAG_PKT_REQUESTED;
1965 }
1966 brcmf_skb_htod_tag_set_field(p, FLAGS, flags);
1967 return brcmf_fws_hdrpush(fws, p);
1968 }
1969  
1970 static void brcmf_fws_rollback_toq(struct brcmf_fws_info *fws,
1971 struct sk_buff *skb, int fifo)
1972 {
1973 struct brcmf_fws_mac_descriptor *entry;
1974 struct sk_buff *pktout;
1975 int qidx, hslot;
1976 int rc = 0;
1977  
1978 entry = brcmf_skbcb(skb)->mac;
1979 if (entry->occupied) {
1980 qidx = 2 * fifo;
1981 if (brcmf_skbcb(skb)->state == BRCMF_FWS_SKBSTATE_SUPPRESSED)
1982 qidx++;
1983  
1984 pktout = brcmu_pktq_penq_head(&entry->psq, qidx, skb);
1985 if (pktout == NULL) {
1986 brcmf_err("%s queue %d full\n", entry->name, qidx);
1987 rc = -ENOSPC;
1988 }
1989 } else {
1990 brcmf_err("%s entry removed\n", entry->name);
1991 rc = -ENOENT;
1992 }
1993  
1994 if (rc) {
1995 fws->stats.rollback_failed++;
1996 hslot = brcmf_skb_htod_tag_get_field(skb, HSLOT);
1997 brcmf_fws_txs_process(fws, BRCMF_FWS_TXSTATUS_HOST_TOSSED,
1998 hslot, 0, 0);
1999 } else {
2000 fws->stats.rollback_success++;
2001 brcmf_fws_return_credits(fws, fifo, 1);
2002 brcmf_fws_macdesc_return_req_credit(skb);
2003 }
2004 }
2005  
2006 static int brcmf_fws_borrow_credit(struct brcmf_fws_info *fws)
2007 {
2008 int lender_ac;
2009  
2010 if (time_after(fws->borrow_defer_timestamp, jiffies)) {
2011 fws->fifo_credit_map &= ~(1 << BRCMF_FWS_FIFO_AC_BE);
2012 return -ENAVAIL;
2013 }
2014  
2015 for (lender_ac = 0; lender_ac <= BRCMF_FWS_FIFO_AC_VO; lender_ac++) {
2016 if (fws->fifo_credit[lender_ac]) {
2017 fws->credits_borrowed[lender_ac]++;
2018 fws->fifo_credit[lender_ac]--;
2019 if (fws->fifo_credit[lender_ac] == 0)
2020 fws->fifo_credit_map &= ~(1 << lender_ac);
2021 fws->fifo_credit_map |= (1 << BRCMF_FWS_FIFO_AC_BE);
2022 brcmf_dbg(DATA, "borrow credit from: %d\n", lender_ac);
2023 return 0;
2024 }
2025 }
2026 fws->fifo_credit_map &= ~(1 << BRCMF_FWS_FIFO_AC_BE);
2027 return -ENAVAIL;
2028 }
2029  
2030 static int brcmf_fws_commit_skb(struct brcmf_fws_info *fws, int fifo,
2031 struct sk_buff *skb)
2032 {
2033 struct brcmf_skbuff_cb *skcb = brcmf_skbcb(skb);
2034 struct brcmf_fws_mac_descriptor *entry;
2035 int rc;
2036 u8 ifidx;
2037 u8 data_offset;
2038  
2039 entry = skcb->mac;
2040 if (IS_ERR(entry))
2041 return PTR_ERR(entry);
2042  
2043 data_offset = brcmf_fws_precommit_skb(fws, fifo, skb);
2044 entry->transit_count++;
2045 if (entry->suppressed)
2046 entry->suppr_transit_count++;
2047 ifidx = brcmf_skb_if_flags_get_field(skb, INDEX);
2048 brcmf_fws_unlock(fws);
2049 rc = brcmf_proto_txdata(fws->drvr, ifidx, data_offset, skb);
2050 brcmf_fws_lock(fws);
2051 brcmf_dbg(DATA, "%s flags %X htod %X bus_tx %d\n", entry->name,
2052 skcb->if_flags, skcb->htod, rc);
2053 if (rc < 0) {
2054 entry->transit_count--;
2055 if (entry->suppressed)
2056 entry->suppr_transit_count--;
2057 (void)brcmf_proto_hdrpull(fws->drvr, false, skb, NULL);
2058 goto rollback;
2059 }
2060  
2061 fws->stats.pkt2bus++;
2062 fws->stats.send_pkts[fifo]++;
2063 if (brcmf_skb_if_flags_get_field(skb, REQUESTED))
2064 fws->stats.requested_sent[fifo]++;
2065  
2066 return rc;
2067  
2068 rollback:
2069 brcmf_fws_rollback_toq(fws, skb, fifo);
2070 return rc;
2071 }
2072  
2073 static int brcmf_fws_assign_htod(struct brcmf_fws_info *fws, struct sk_buff *p,
2074 int fifo)
2075 {
2076 struct brcmf_skbuff_cb *skcb = brcmf_skbcb(p);
2077 int rc, hslot;
2078  
2079 skcb->htod = 0;
2080 skcb->htod_seq = 0;
2081 hslot = brcmf_fws_hanger_get_free_slot(&fws->hanger);
2082 brcmf_skb_htod_tag_set_field(p, HSLOT, hslot);
2083 brcmf_skb_htod_tag_set_field(p, FREERUN, skcb->mac->seq[fifo]);
2084 brcmf_skb_htod_tag_set_field(p, FIFO, fifo);
2085 rc = brcmf_fws_hanger_pushpkt(&fws->hanger, p, hslot);
2086 if (!rc)
2087 skcb->mac->seq[fifo]++;
2088 else
2089 fws->stats.generic_error++;
2090 return rc;
2091 }
2092  
2093 int brcmf_fws_process_skb(struct brcmf_if *ifp, struct sk_buff *skb)
2094 {
2095 struct brcmf_fws_info *fws = drvr_to_fws(ifp->drvr);
2096 struct brcmf_skbuff_cb *skcb = brcmf_skbcb(skb);
2097 struct ethhdr *eh = (struct ethhdr *)(skb->data);
2098 int fifo = BRCMF_FWS_FIFO_BCMC;
2099 bool multicast = is_multicast_ether_addr(eh->h_dest);
2100 int rc = 0;
2101  
2102 brcmf_dbg(DATA, "tx proto=0x%X\n", ntohs(eh->h_proto));
2103  
2104 /* set control buffer information */
2105 skcb->if_flags = 0;
2106 skcb->state = BRCMF_FWS_SKBSTATE_NEW;
2107 brcmf_skb_if_flags_set_field(skb, INDEX, ifp->ifidx);
2108 if (!multicast)
2109 fifo = brcmf_fws_prio2fifo[skb->priority];
2110  
2111 brcmf_fws_lock(fws);
2112 if (fifo != BRCMF_FWS_FIFO_AC_BE && fifo < BRCMF_FWS_FIFO_BCMC)
2113 fws->borrow_defer_timestamp = jiffies +
2114 BRCMF_FWS_BORROW_DEFER_PERIOD;
2115  
2116 skcb->mac = brcmf_fws_macdesc_find(fws, ifp, eh->h_dest);
2117 brcmf_dbg(DATA, "%s mac %pM multi %d fifo %d\n", skcb->mac->name,
2118 eh->h_dest, multicast, fifo);
2119 if (!brcmf_fws_assign_htod(fws, skb, fifo)) {
2120 brcmf_fws_enq(fws, BRCMF_FWS_SKBSTATE_DELAYED, fifo, skb);
2121 brcmf_fws_schedule_deq(fws);
2122 } else {
2123 brcmf_err("drop skb: no hanger slot\n");
2124 brcmf_txfinalize(ifp, skb, false);
2125 rc = -ENOMEM;
2126 }
2127 brcmf_fws_unlock(fws);
2128  
2129 return rc;
2130 }
2131  
2132 void brcmf_fws_reset_interface(struct brcmf_if *ifp)
2133 {
2134 struct brcmf_fws_mac_descriptor *entry = ifp->fws_desc;
2135  
2136 brcmf_dbg(TRACE, "enter: bsscfgidx=%d\n", ifp->bsscfgidx);
2137 if (!entry)
2138 return;
2139  
2140 brcmf_fws_macdesc_init(entry, ifp->mac_addr, ifp->ifidx);
2141 }
2142  
2143 void brcmf_fws_add_interface(struct brcmf_if *ifp)
2144 {
2145 struct brcmf_fws_info *fws = drvr_to_fws(ifp->drvr);
2146 struct brcmf_fws_mac_descriptor *entry;
2147  
2148 if (!ifp->ndev || !brcmf_fws_queue_skbs(fws))
2149 return;
2150  
2151 entry = &fws->desc.iface[ifp->ifidx];
2152 ifp->fws_desc = entry;
2153 brcmf_fws_macdesc_init(entry, ifp->mac_addr, ifp->ifidx);
2154 brcmf_fws_macdesc_set_name(fws, entry);
2155 brcmu_pktq_init(&entry->psq, BRCMF_FWS_PSQ_PREC_COUNT,
2156 BRCMF_FWS_PSQ_LEN);
2157 brcmf_dbg(TRACE, "added %s\n", entry->name);
2158 }
2159  
2160 void brcmf_fws_del_interface(struct brcmf_if *ifp)
2161 {
2162 struct brcmf_fws_mac_descriptor *entry = ifp->fws_desc;
2163 struct brcmf_fws_info *fws = drvr_to_fws(ifp->drvr);
2164  
2165 if (!entry)
2166 return;
2167  
2168 brcmf_fws_lock(fws);
2169 ifp->fws_desc = NULL;
2170 brcmf_dbg(TRACE, "deleting %s\n", entry->name);
2171 brcmf_fws_macdesc_deinit(entry);
2172 brcmf_fws_cleanup(fws, ifp->ifidx);
2173 brcmf_fws_unlock(fws);
2174 }
2175  
2176 static void brcmf_fws_dequeue_worker(struct work_struct *worker)
2177 {
2178 struct brcmf_fws_info *fws;
2179 struct brcmf_pub *drvr;
2180 struct sk_buff *skb;
2181 int fifo;
2182 u32 hslot;
2183 u32 ifidx;
2184 int ret;
2185  
2186 fws = container_of(worker, struct brcmf_fws_info, fws_dequeue_work);
2187 drvr = fws->drvr;
2188  
2189 brcmf_fws_lock(fws);
2190 for (fifo = BRCMF_FWS_FIFO_BCMC; fifo >= 0 && !fws->bus_flow_blocked;
2191 fifo--) {
2192 if (!brcmf_fws_fc_active(fws)) {
2193 while ((skb = brcmf_fws_deq(fws, fifo)) != NULL) {
2194 hslot = brcmf_skb_htod_tag_get_field(skb,
2195 HSLOT);
2196 brcmf_fws_hanger_poppkt(&fws->hanger, hslot,
2197 &skb, true);
2198 ifidx = brcmf_skb_if_flags_get_field(skb,
2199 INDEX);
2200 /* Use proto layer to send data frame */
2201 brcmf_fws_unlock(fws);
2202 ret = brcmf_proto_txdata(drvr, ifidx, 0, skb);
2203 brcmf_fws_lock(fws);
2204 if (ret < 0)
2205 brcmf_txfinalize(brcmf_get_ifp(drvr,
2206 ifidx),
2207 skb, false);
2208 if (fws->bus_flow_blocked)
2209 break;
2210 }
2211 continue;
2212 }
2213 while ((fws->fifo_credit[fifo]) || ((!fws->bcmc_credit_check) &&
2214 (fifo == BRCMF_FWS_FIFO_BCMC))) {
2215 skb = brcmf_fws_deq(fws, fifo);
2216 if (!skb)
2217 break;
2218 fws->fifo_credit[fifo]--;
2219 if (brcmf_fws_commit_skb(fws, fifo, skb))
2220 break;
2221 if (fws->bus_flow_blocked)
2222 break;
2223 }
2224 if ((fifo == BRCMF_FWS_FIFO_AC_BE) &&
2225 (fws->fifo_credit[fifo] == 0) &&
2226 (!fws->bus_flow_blocked)) {
2227 while (brcmf_fws_borrow_credit(fws) == 0) {
2228 skb = brcmf_fws_deq(fws, fifo);
2229 if (!skb) {
2230 brcmf_fws_return_credits(fws, fifo, 1);
2231 break;
2232 }
2233 if (brcmf_fws_commit_skb(fws, fifo, skb))
2234 break;
2235 if (fws->bus_flow_blocked)
2236 break;
2237 }
2238 }
2239 }
2240 brcmf_fws_unlock(fws);
2241 }
2242  
2243 #ifdef DEBUG
2244 static int brcmf_debugfs_fws_stats_read(struct seq_file *seq, void *data)
2245 {
2246 struct brcmf_bus *bus_if = dev_get_drvdata(seq->private);
2247 struct brcmf_fws_stats *fwstats = &(drvr_to_fws(bus_if->drvr)->stats);
2248  
2249 seq_printf(seq,
2250 "header_pulls: %u\n"
2251 "header_only_pkt: %u\n"
2252 "tlv_parse_failed: %u\n"
2253 "tlv_invalid_type: %u\n"
2254 "mac_update_fails: %u\n"
2255 "ps_update_fails: %u\n"
2256 "if_update_fails: %u\n"
2257 "pkt2bus: %u\n"
2258 "generic_error: %u\n"
2259 "rollback_success: %u\n"
2260 "rollback_failed: %u\n"
2261 "delayq_full: %u\n"
2262 "supprq_full: %u\n"
2263 "txs_indicate: %u\n"
2264 "txs_discard: %u\n"
2265 "txs_suppr_core: %u\n"
2266 "txs_suppr_ps: %u\n"
2267 "txs_tossed: %u\n"
2268 "txs_host_tossed: %u\n"
2269 "bus_flow_block: %u\n"
2270 "fws_flow_block: %u\n"
2271 "send_pkts: BK:%u BE:%u VO:%u VI:%u BCMC:%u\n"
2272 "requested_sent: BK:%u BE:%u VO:%u VI:%u BCMC:%u\n",
2273 fwstats->header_pulls,
2274 fwstats->header_only_pkt,
2275 fwstats->tlv_parse_failed,
2276 fwstats->tlv_invalid_type,
2277 fwstats->mac_update_failed,
2278 fwstats->mac_ps_update_failed,
2279 fwstats->if_update_failed,
2280 fwstats->pkt2bus,
2281 fwstats->generic_error,
2282 fwstats->rollback_success,
2283 fwstats->rollback_failed,
2284 fwstats->delayq_full_error,
2285 fwstats->supprq_full_error,
2286 fwstats->txs_indicate,
2287 fwstats->txs_discard,
2288 fwstats->txs_supp_core,
2289 fwstats->txs_supp_ps,
2290 fwstats->txs_tossed,
2291 fwstats->txs_host_tossed,
2292 fwstats->bus_flow_block,
2293 fwstats->fws_flow_block,
2294 fwstats->send_pkts[0], fwstats->send_pkts[1],
2295 fwstats->send_pkts[2], fwstats->send_pkts[3],
2296 fwstats->send_pkts[4],
2297 fwstats->requested_sent[0],
2298 fwstats->requested_sent[1],
2299 fwstats->requested_sent[2],
2300 fwstats->requested_sent[3],
2301 fwstats->requested_sent[4]);
2302  
2303 return 0;
2304 }
2305 #else
2306 static int brcmf_debugfs_fws_stats_read(struct seq_file *seq, void *data)
2307 {
2308 return 0;
2309 }
2310 #endif
2311  
2312 struct brcmf_fws_info *brcmf_fws_attach(struct brcmf_pub *drvr)
2313 {
2314 struct brcmf_fws_info *fws;
2315 struct brcmf_if *ifp;
2316 u32 tlv = BRCMF_FWS_FLAGS_RSSI_SIGNALS;
2317 int rc;
2318 u32 mode;
2319  
2320 fws = kzalloc(sizeof(*fws), GFP_KERNEL);
2321 if (!fws) {
2322 rc = -ENOMEM;
2323 goto fail;
2324 }
2325  
2326 spin_lock_init(&fws->spinlock);
2327  
2328 /* store drvr reference */
2329 fws->drvr = drvr;
2330 fws->fcmode = drvr->settings->fcmode;
2331  
2332 if ((drvr->bus_if->always_use_fws_queue == false) &&
2333 (fws->fcmode == BRCMF_FWS_FCMODE_NONE)) {
2334 fws->avoid_queueing = true;
2335 brcmf_dbg(INFO, "FWS queueing will be avoided\n");
2336 return fws;
2337 }
2338  
2339 fws->fws_wq = create_singlethread_workqueue("brcmf_fws_wq");
2340 if (fws->fws_wq == NULL) {
2341 brcmf_err("workqueue creation failed\n");
2342 rc = -EBADF;
2343 goto fail;
2344 }
2345 INIT_WORK(&fws->fws_dequeue_work, brcmf_fws_dequeue_worker);
2346  
2347 /* enable firmware signalling if fcmode active */
2348 if (fws->fcmode != BRCMF_FWS_FCMODE_NONE)
2349 tlv |= BRCMF_FWS_FLAGS_XONXOFF_SIGNALS |
2350 BRCMF_FWS_FLAGS_CREDIT_STATUS_SIGNALS |
2351 BRCMF_FWS_FLAGS_HOST_PROPTXSTATUS_ACTIVE |
2352 BRCMF_FWS_FLAGS_HOST_RXREORDER_ACTIVE;
2353  
2354 rc = brcmf_fweh_register(drvr, BRCMF_E_FIFO_CREDIT_MAP,
2355 brcmf_fws_notify_credit_map);
2356 if (rc < 0) {
2357 brcmf_err("register credit map handler failed\n");
2358 goto fail;
2359 }
2360 rc = brcmf_fweh_register(drvr, BRCMF_E_BCMC_CREDIT_SUPPORT,
2361 brcmf_fws_notify_bcmc_credit_support);
2362 if (rc < 0) {
2363 brcmf_err("register bcmc credit handler failed\n");
2364 brcmf_fweh_unregister(drvr, BRCMF_E_FIFO_CREDIT_MAP);
2365 goto fail;
2366 }
2367  
2368 /* Setting the iovar may fail if feature is unsupported
2369 * so leave the rc as is so driver initialization can
2370 * continue. Set mode back to none indicating not enabled.
2371 */
2372 fws->fw_signals = true;
2373 ifp = brcmf_get_ifp(drvr, 0);
2374 if (brcmf_fil_iovar_int_set(ifp, "tlv", tlv)) {
2375 brcmf_err("failed to set bdcv2 tlv signaling\n");
2376 fws->fcmode = BRCMF_FWS_FCMODE_NONE;
2377 fws->fw_signals = false;
2378 }
2379  
2380 if (brcmf_fil_iovar_int_set(ifp, "ampdu_hostreorder", 1))
2381 brcmf_dbg(INFO, "enabling AMPDU host-reorder failed\n");
2382  
2383 /* Enable seq number reuse, if supported */
2384 if (brcmf_fil_iovar_int_get(ifp, "wlfc_mode", &mode) == 0) {
2385 if (BRCMF_FWS_MODE_GET_REUSESEQ(mode)) {
2386 mode = 0;
2387 BRCMF_FWS_MODE_SET_REUSESEQ(mode, 1);
2388 if (brcmf_fil_iovar_int_set(ifp,
2389 "wlfc_mode", mode) == 0) {
2390 BRCMF_FWS_MODE_SET_REUSESEQ(fws->mode, 1);
2391 }
2392 }
2393 }
2394  
2395 brcmf_fws_hanger_init(&fws->hanger);
2396 brcmf_fws_macdesc_init(&fws->desc.other, NULL, 0);
2397 brcmf_fws_macdesc_set_name(fws, &fws->desc.other);
2398 brcmf_dbg(INFO, "added %s\n", fws->desc.other.name);
2399 brcmu_pktq_init(&fws->desc.other.psq, BRCMF_FWS_PSQ_PREC_COUNT,
2400 BRCMF_FWS_PSQ_LEN);
2401  
2402 /* create debugfs file for statistics */
2403 brcmf_debugfs_add_entry(drvr, "fws_stats",
2404 brcmf_debugfs_fws_stats_read);
2405  
2406 brcmf_dbg(INFO, "%s bdcv2 tlv signaling [%x]\n",
2407 fws->fw_signals ? "enabled" : "disabled", tlv);
2408 return fws;
2409  
2410 fail:
2411 brcmf_fws_detach(fws);
2412 return ERR_PTR(rc);
2413 }
2414  
2415 void brcmf_fws_detach(struct brcmf_fws_info *fws)
2416 {
2417 if (!fws)
2418 return;
2419  
2420 if (fws->fws_wq)
2421 destroy_workqueue(fws->fws_wq);
2422  
2423 /* cleanup */
2424 brcmf_fws_lock(fws);
2425 brcmf_fws_cleanup(fws, -1);
2426 brcmf_fws_unlock(fws);
2427  
2428 /* free top structure */
2429 kfree(fws);
2430 }
2431  
2432 bool brcmf_fws_queue_skbs(struct brcmf_fws_info *fws)
2433 {
2434 return !fws->avoid_queueing;
2435 }
2436  
2437 bool brcmf_fws_fc_active(struct brcmf_fws_info *fws)
2438 {
2439 if (!fws->creditmap_received)
2440 return false;
2441  
2442 return fws->fcmode != BRCMF_FWS_FCMODE_NONE;
2443 }
2444  
2445 void brcmf_fws_bustxfail(struct brcmf_fws_info *fws, struct sk_buff *skb)
2446 {
2447 u32 hslot;
2448  
2449 if (brcmf_skbcb(skb)->state == BRCMF_FWS_SKBSTATE_TIM) {
2450 brcmu_pkt_buf_free_skb(skb);
2451 return;
2452 }
2453 brcmf_fws_lock(fws);
2454 hslot = brcmf_skb_htod_tag_get_field(skb, HSLOT);
2455 brcmf_fws_txs_process(fws, BRCMF_FWS_TXSTATUS_HOST_TOSSED, hslot, 0, 0);
2456 brcmf_fws_unlock(fws);
2457 }
2458  
2459 void brcmf_fws_bus_blocked(struct brcmf_pub *drvr, bool flow_blocked)
2460 {
2461 struct brcmf_fws_info *fws = drvr_to_fws(drvr);
2462 struct brcmf_if *ifp;
2463 int i;
2464  
2465 if (fws->avoid_queueing) {
2466 for (i = 0; i < BRCMF_MAX_IFS; i++) {
2467 ifp = drvr->iflist[i];
2468 if (!ifp || !ifp->ndev)
2469 continue;
2470 brcmf_txflowblock_if(ifp, BRCMF_NETIF_STOP_REASON_FLOW,
2471 flow_blocked);
2472 }
2473 } else {
2474 fws->bus_flow_blocked = flow_blocked;
2475 if (!flow_blocked)
2476 brcmf_fws_schedule_deq(fws);
2477 else
2478 fws->stats.bus_flow_block++;
2479 }
2480 }