2 * Copyright (c) 2010 Broadcom Corporation
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.
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.
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>
27 #include <brcmu_utils.h>
28 #include <brcmu_wifi.h>
33 #include "fwil_types.h"
43 * DOC: Firmware Signalling
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.
51 * single definition for firmware-driver flow control tlv's.
53 * each tlv is specified by BRCMF_FWS_TLV_DEF(name, ID, length).
54 * A length value 0 indicates variable length tlv.
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)
76 * enum brcmf_fws_tlv_type - definition of tlv identifiers.
78 #define BRCMF_FWS_TLV_DEF(name, id, len) \
79 BRCMF_FWS_TYPE_ ## name = id,
80 enum brcmf_fws_tlv_type {
82 BRCMF_FWS_TYPE_INVALID
84 #undef BRCMF_FWS_TLV_DEF
87 * enum brcmf_fws_tlv_len - definition of tlv lengths.
89 #define BRCMF_FWS_TLV_DEF(name, id, len) \
90 BRCMF_FWS_TYPE_ ## name ## _LEN = (len),
91 enum brcmf_fws_tlv_len {
94 #undef BRCMF_FWS_TLV_DEF
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
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
111 * brcmf_fws_tlv_names - array of tlv names.
113 #define BRCMF_FWS_TLV_DEF(name, id, len) \
116 enum brcmf_fws_tlv_type id;
118 } brcmf_fws_tlv_names[] = {
119 BRCMF_FWS_TLV_DEFLIST
121 #undef BRCMF_FWS_TLV_DEF
124 static const char *brcmf_fws_get_tlv_name(enum brcmf_fws_tlv_type id)
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;
135 static const char *brcmf_fws_get_tlv_name(enum brcmf_fws_tlv_type id)
142 * The PKTTAG tlv has additional bytes when firmware-signalling
143 * mode has REUSESEQ flag set.
145 #define BRCMF_FWS_TYPE_SEQ_LEN 2
148 * flags used to enable tlv signalling from firmware.
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
158 #define BRCMF_FWS_MAC_DESC_TABLE_SIZE 32
159 #define BRCMF_FWS_MAC_DESC_ID_INVALID 0xff
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
166 #define BRCMF_FWS_PSQ_PREC_COUNT ((BRCMF_FWS_FIFO_COUNT + 1) * 2)
167 #define BRCMF_FWS_PSQ_LEN 256
169 #define BRCMF_FWS_HTOD_FLAG_PKTFROMHOST 0x01
170 #define BRCMF_FWS_HTOD_FLAG_PKT_REQUESTED 0x02
172 #define BRCMF_FWS_RET_OK_NOSCHEDULE 0
173 #define BRCMF_FWS_RET_OK_SCHEDULE 1
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)
183 * enum brcmf_fws_skb_state - indicates processing state of skb.
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.
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
198 * struct brcmf_skbuff_cb - control buffer associated with skbuff.
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.
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.
210 struct brcmf_skbuff_cb {
215 enum brcmf_fws_skb_state state;
216 struct brcmf_fws_mac_descriptor *mac;
220 * macro casting skbuff control buffer to struct brcmf_skbuff_cb.
222 #define brcmf_skbcb(skb) ((struct brcmf_skbuff_cb *)((skb)->cb))
225 * sk_buff control if flags
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.
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
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)
257 * sk_buff control packet identifier
259 * 32-bit packet identifier used in PKTTAG tlv from host to dongle.
261 * - Generated at the host (e.g. dhd)
262 * - Seen as a generic sequence number by firmware except for the flags field.
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
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
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)
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
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)
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
318 #define brcmf_txstatus_get_field(txs, field) \
319 brcmu_maskget32(txs, BRCMF_FWS_TXSTAT_ ## field ## _MASK, \
320 BRCMF_FWS_TXSTAT_ ## field ## _SHIFT)
322 /* How long to defer borrowing in jiffies */
323 #define BRCMF_FWS_BORROW_DEFER_PERIOD (HZ / 10)
326 * enum brcmf_fws_fifo - fifo indices used by dongle firmware.
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.
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,
349 * enum brcmf_fws_txstatus - txstatus flag values.
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.
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
370 enum brcmf_fws_fcmode {
371 BRCMF_FWS_FCMODE_NONE,
372 BRCMF_FWS_FCMODE_IMPLIED_CREDIT,
373 BRCMF_FWS_FCMODE_EXPLICIT_CREDIT
376 enum brcmf_fws_mac_desc_state {
377 BRCMF_FWS_STATE_OPEN = 1,
378 BRCMF_FWS_STATE_CLOSE
382 * struct brcmf_fws_mac_descriptor - firmware signalling data per node/interface
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.
397 struct brcmf_fws_mac_descriptor {
409 u8 seq[BRCMF_FWS_FIFO_COUNT];
412 int suppr_transit_count;
413 bool send_tim_signal;
414 u8 traffic_pending_bmp;
415 u8 traffic_lastreported_bmp;
418 #define BRCMF_FWS_HANGER_MAXITEMS 1024
421 * enum brcmf_fws_hanger_item_state - state of hanger item.
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.
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
435 * struct brcmf_fws_hanger_item - single entry for tx pending packet.
437 * @state: entry is either free or occupied.
438 * @pkt: packet itself.
440 struct brcmf_fws_hanger_item {
441 enum brcmf_fws_hanger_item_state state;
446 * struct brcmf_fws_hanger - holds packets awaiting firmware txstatus.
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.
456 struct brcmf_fws_hanger {
463 struct brcmf_fws_hanger_item items[BRCMF_FWS_HANGER_MAXITEMS];
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;
472 struct brcmf_fws_stats {
473 u32 tlv_parse_failed;
474 u32 tlv_invalid_type;
479 u32 requested_sent[5];
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;
488 u32 delayq_full_error;
489 u32 supprq_full_error;
500 struct brcmf_fws_info {
501 struct brcmf_pub *drvr;
504 struct brcmf_fws_stats stats;
505 struct brcmf_fws_hanger hanger;
506 enum brcmf_fws_fcmode fcmode;
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];
518 unsigned long borrow_defer_timestamp;
519 bool bus_flow_blocked;
520 bool creditmap_received;
526 * brcmf_fws_prio2fifo - mapping from 802.1d priority to firmware fifo index.
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,
539 #define BRCMF_FWS_TLV_DEF(name, id, len) \
540 case BRCMF_FWS_TYPE_ ## name: \
544 * brcmf_fws_get_tlv_len() - returns defined length for given tlv id.
546 * @fws: firmware-signalling information.
547 * @id: identifier of the TLV.
549 * Return: the specified length for the given TLV; Otherwise -EINVAL.
551 static int brcmf_fws_get_tlv_len(struct brcmf_fws_info *fws,
552 enum brcmf_fws_tlv_type id)
555 BRCMF_FWS_TLV_DEFLIST
557 fws->stats.tlv_invalid_type++;
562 #undef BRCMF_FWS_TLV_DEF
564 static void brcmf_fws_lock(struct brcmf_fws_info *fws)
565 __acquires(&fws->spinlock)
567 spin_lock_irqsave(&fws->spinlock, fws->flags);
570 static void brcmf_fws_unlock(struct brcmf_fws_info *fws)
571 __releases(&fws->spinlock)
573 spin_unlock_irqrestore(&fws->spinlock, fws->flags);
576 static bool brcmf_fws_ifidx_match(struct sk_buff *skb, void *arg)
578 u32 ifidx = brcmf_skb_if_flags_get_field(skb, INDEX);
579 return ifidx == *(int *)arg;
582 static void brcmf_fws_hanger_init(struct brcmf_fws_hanger *hanger)
586 memset(hanger, 0, sizeof(*hanger));
587 for (i = 0; i < ARRAY_SIZE(hanger->items); i++)
588 hanger->items[i].state = BRCMF_FWS_HANGER_ITEM_STATE_FREE;
591 static u32 brcmf_fws_hanger_get_free_slot(struct brcmf_fws_hanger *h)
595 i = (h->slot_pos + 1) % BRCMF_FWS_HANGER_MAXITEMS;
597 while (i != h->slot_pos) {
598 if (h->items[i].state == BRCMF_FWS_HANGER_ITEM_STATE_FREE) {
603 if (i == BRCMF_FWS_HANGER_MAXITEMS)
606 brcmf_err("all slots occupied\n");
607 h->failed_slotfind++;
608 i = BRCMF_FWS_HANGER_MAXITEMS;
613 static int brcmf_fws_hanger_pushpkt(struct brcmf_fws_hanger *h,
614 struct sk_buff *pkt, u32 slot_id)
616 if (slot_id >= BRCMF_FWS_HANGER_MAXITEMS)
619 if (h->items[slot_id].state != BRCMF_FWS_HANGER_ITEM_STATE_FREE) {
620 brcmf_err("slot is not free\n");
625 h->items[slot_id].state = BRCMF_FWS_HANGER_ITEM_STATE_INUSE;
626 h->items[slot_id].pkt = pkt;
631 static inline int brcmf_fws_hanger_poppkt(struct brcmf_fws_hanger *h,
632 u32 slot_id, struct sk_buff **pktout,
635 if (slot_id >= BRCMF_FWS_HANGER_MAXITEMS)
638 if (h->items[slot_id].state == BRCMF_FWS_HANGER_ITEM_STATE_FREE) {
639 brcmf_err("entry not in use\n");
644 *pktout = h->items[slot_id].pkt;
646 h->items[slot_id].state = BRCMF_FWS_HANGER_ITEM_STATE_FREE;
647 h->items[slot_id].pkt = NULL;
653 static void brcmf_fws_psq_flush(struct brcmf_fws_info *fws, struct pktq *q,
656 struct brcmf_fws_hanger_item *hi;
657 bool (*matchfn)(struct sk_buff *, void *) = NULL;
663 matchfn = brcmf_fws_ifidx_match;
664 for (prec = 0; prec < q->num_prec; prec++) {
665 skb = brcmu_pktq_pdeq_match(q, prec, matchfn, &ifidx);
667 hslot = brcmf_skb_htod_tag_get_field(skb, HSLOT);
668 hi = &fws->hanger.items[hslot];
669 WARN_ON(skb != hi->pkt);
670 hi->state = BRCMF_FWS_HANGER_ITEM_STATE_FREE;
671 brcmf_fws_hanger_poppkt(&fws->hanger, hslot, &skb,
673 brcmu_pkt_buf_free_skb(skb);
674 skb = brcmu_pktq_pdeq_match(q, prec, matchfn, &ifidx);
679 static int brcmf_fws_hanger_mark_suppressed(struct brcmf_fws_hanger *h,
682 if (slot_id >= BRCMF_FWS_HANGER_MAXITEMS)
685 if (h->items[slot_id].state == BRCMF_FWS_HANGER_ITEM_STATE_FREE) {
686 brcmf_err("entry not in use\n");
690 h->items[slot_id].state = BRCMF_FWS_HANGER_ITEM_STATE_INUSE_SUPPRESSED;
694 static void brcmf_fws_hanger_cleanup(struct brcmf_fws_info *fws,
695 bool (*fn)(struct sk_buff *, void *),
698 struct brcmf_fws_hanger *h = &fws->hanger;
701 enum brcmf_fws_hanger_item_state s;
703 for (i = 0; i < ARRAY_SIZE(h->items); i++) {
704 s = h->items[i].state;
705 if (s == BRCMF_FWS_HANGER_ITEM_STATE_INUSE ||
706 s == BRCMF_FWS_HANGER_ITEM_STATE_INUSE_SUPPRESSED) {
707 skb = h->items[i].pkt;
708 if (fn == NULL || fn(skb, &ifidx)) {
709 /* suppress packets freed from psq */
710 if (s == BRCMF_FWS_HANGER_ITEM_STATE_INUSE)
711 brcmu_pkt_buf_free_skb(skb);
713 BRCMF_FWS_HANGER_ITEM_STATE_FREE;
719 static void brcmf_fws_macdesc_set_name(struct brcmf_fws_info *fws,
720 struct brcmf_fws_mac_descriptor *desc)
722 if (desc == &fws->desc.other)
723 strlcpy(desc->name, "MAC-OTHER", sizeof(desc->name));
724 else if (desc->mac_handle)
725 scnprintf(desc->name, sizeof(desc->name), "MAC-%d:%d",
726 desc->mac_handle, desc->interface_id);
728 scnprintf(desc->name, sizeof(desc->name), "MACIF:%d",
732 static void brcmf_fws_macdesc_init(struct brcmf_fws_mac_descriptor *desc,
736 "enter: desc %p ea=%pM, ifidx=%u\n", desc, addr, ifidx);
738 desc->state = BRCMF_FWS_STATE_OPEN;
739 desc->requested_credit = 0;
740 desc->requested_packet = 0;
741 /* depending on use may need ifp->bsscfgidx instead */
742 desc->interface_id = ifidx;
743 desc->ac_bitmap = 0xff; /* update this when handling APSD */
745 memcpy(&desc->ea[0], addr, ETH_ALEN);
749 void brcmf_fws_macdesc_deinit(struct brcmf_fws_mac_descriptor *desc)
752 "enter: ea=%pM, ifidx=%u\n", desc->ea, desc->interface_id);
754 desc->state = BRCMF_FWS_STATE_CLOSE;
755 desc->requested_credit = 0;
756 desc->requested_packet = 0;
759 static struct brcmf_fws_mac_descriptor *
760 brcmf_fws_macdesc_lookup(struct brcmf_fws_info *fws, u8 *ea)
762 struct brcmf_fws_mac_descriptor *entry;
766 return ERR_PTR(-EINVAL);
768 entry = &fws->desc.nodes[0];
769 for (i = 0; i < ARRAY_SIZE(fws->desc.nodes); i++) {
770 if (entry->occupied && !memcmp(entry->ea, ea, ETH_ALEN))
775 return ERR_PTR(-ENOENT);
778 static struct brcmf_fws_mac_descriptor*
779 brcmf_fws_macdesc_find(struct brcmf_fws_info *fws, struct brcmf_if *ifp, u8 *da)
781 struct brcmf_fws_mac_descriptor *entry = &fws->desc.other;
784 multicast = is_multicast_ether_addr(da);
786 /* Multicast destination, STA and P2P clients get the interface entry.
787 * STA/GC gets the Mac Entry for TDLS destinations, TDLS destinations
788 * have their own entry.
790 if (multicast && ifp->fws_desc) {
791 entry = ifp->fws_desc;
795 entry = brcmf_fws_macdesc_lookup(fws, da);
797 entry = ifp->fws_desc;
803 static bool brcmf_fws_macdesc_closed(struct brcmf_fws_info *fws,
804 struct brcmf_fws_mac_descriptor *entry,
807 struct brcmf_fws_mac_descriptor *if_entry;
810 /* for unique destination entries the related interface
813 if (entry->mac_handle) {
814 if_entry = &fws->desc.iface[entry->interface_id];
815 if (if_entry->state == BRCMF_FWS_STATE_CLOSE)
818 /* an entry is closed when the state is closed and
819 * the firmware did not request anything.
821 closed = entry->state == BRCMF_FWS_STATE_CLOSE &&
822 !entry->requested_credit && !entry->requested_packet;
824 /* Or firmware does not allow traffic for given fifo */
825 return closed || !(entry->ac_bitmap & BIT(fifo));
828 static void brcmf_fws_macdesc_cleanup(struct brcmf_fws_info *fws,
829 struct brcmf_fws_mac_descriptor *entry,
832 if (entry->occupied && (ifidx == -1 || ifidx == entry->interface_id)) {
833 brcmf_fws_psq_flush(fws, &entry->psq, ifidx);
834 entry->occupied = !!(entry->psq.len);
838 static void brcmf_fws_bus_txq_cleanup(struct brcmf_fws_info *fws,
839 bool (*fn)(struct sk_buff *, void *),
842 struct brcmf_fws_hanger_item *hi;
848 txq = brcmf_bus_gettxq(fws->drvr->bus_if);
850 brcmf_dbg(TRACE, "no txq to clean up\n");
854 for (prec = 0; prec < txq->num_prec; prec++) {
855 skb = brcmu_pktq_pdeq_match(txq, prec, fn, &ifidx);
857 hslot = brcmf_skb_htod_tag_get_field(skb, HSLOT);
858 hi = &fws->hanger.items[hslot];
859 WARN_ON(skb != hi->pkt);
860 hi->state = BRCMF_FWS_HANGER_ITEM_STATE_FREE;
861 brcmu_pkt_buf_free_skb(skb);
862 skb = brcmu_pktq_pdeq_match(txq, prec, fn, &ifidx);
867 static void brcmf_fws_cleanup(struct brcmf_fws_info *fws, int ifidx)
870 struct brcmf_fws_mac_descriptor *table;
871 bool (*matchfn)(struct sk_buff *, void *) = NULL;
877 matchfn = brcmf_fws_ifidx_match;
879 /* cleanup individual nodes */
880 table = &fws->desc.nodes[0];
881 for (i = 0; i < ARRAY_SIZE(fws->desc.nodes); i++)
882 brcmf_fws_macdesc_cleanup(fws, &table[i], ifidx);
884 brcmf_fws_macdesc_cleanup(fws, &fws->desc.other, ifidx);
885 brcmf_fws_bus_txq_cleanup(fws, matchfn, ifidx);
886 brcmf_fws_hanger_cleanup(fws, matchfn, ifidx);
889 static u8 brcmf_fws_hdrpush(struct brcmf_fws_info *fws, struct sk_buff *skb)
891 struct brcmf_fws_mac_descriptor *entry = brcmf_skbcb(skb)->mac;
895 __le32 pkttag = cpu_to_le32(brcmf_skbcb(skb)->htod);
896 __le16 pktseq = cpu_to_le16(brcmf_skbcb(skb)->htod_seq);
898 brcmf_dbg(TRACE, "enter: %s, idx=%d hslot=%d htod %X seq %X\n",
899 entry->name, brcmf_skb_if_flags_get_field(skb, INDEX),
900 (le32_to_cpu(pkttag) >> 8) & 0xffff,
901 brcmf_skbcb(skb)->htod, brcmf_skbcb(skb)->htod_seq);
902 if (entry->send_tim_signal)
903 data_offset += 2 + BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP_LEN;
904 if (BRCMF_FWS_MODE_GET_REUSESEQ(fws->mode))
905 data_offset += BRCMF_FWS_TYPE_SEQ_LEN;
906 /* +2 is for Type[1] and Len[1] in TLV, plus TIM signal */
907 data_offset += 2 + BRCMF_FWS_TYPE_PKTTAG_LEN;
908 fillers = round_up(data_offset, 4) - data_offset;
909 data_offset += fillers;
911 skb_push(skb, data_offset);
914 wlh[0] = BRCMF_FWS_TYPE_PKTTAG;
915 wlh[1] = BRCMF_FWS_TYPE_PKTTAG_LEN;
916 memcpy(&wlh[2], &pkttag, sizeof(pkttag));
917 if (BRCMF_FWS_MODE_GET_REUSESEQ(fws->mode)) {
918 wlh[1] += BRCMF_FWS_TYPE_SEQ_LEN;
919 memcpy(&wlh[2 + BRCMF_FWS_TYPE_PKTTAG_LEN], &pktseq,
924 if (entry->send_tim_signal) {
925 entry->send_tim_signal = 0;
926 wlh[0] = BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP;
927 wlh[1] = BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP_LEN;
928 wlh[2] = entry->mac_handle;
929 wlh[3] = entry->traffic_pending_bmp;
930 brcmf_dbg(TRACE, "adding TIM info: handle %d bmp 0x%X\n",
931 entry->mac_handle, entry->traffic_pending_bmp);
932 wlh += BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP_LEN + 2;
933 entry->traffic_lastreported_bmp = entry->traffic_pending_bmp;
936 memset(wlh, BRCMF_FWS_TYPE_FILLER, fillers);
938 return (u8)(data_offset >> 2);
941 static bool brcmf_fws_tim_update(struct brcmf_fws_info *fws,
942 struct brcmf_fws_mac_descriptor *entry,
943 int fifo, bool send_immediately)
946 struct brcmf_skbuff_cb *skcb;
952 /* check delayedQ and suppressQ in one call using bitmap */
953 if (brcmu_pktq_mlen(&entry->psq, 3 << (fifo * 2)) == 0)
954 entry->traffic_pending_bmp &= ~NBITVAL(fifo);
956 entry->traffic_pending_bmp |= NBITVAL(fifo);
958 entry->send_tim_signal = false;
959 if (entry->traffic_lastreported_bmp != entry->traffic_pending_bmp)
960 entry->send_tim_signal = true;
961 if (send_immediately && entry->send_tim_signal &&
962 entry->state == BRCMF_FWS_STATE_CLOSE) {
963 /* create a dummy packet and sent that. The traffic */
964 /* bitmap info will automatically be attached to that packet */
965 len = BRCMF_FWS_TYPE_PKTTAG_LEN + 2 +
966 BRCMF_FWS_TYPE_SEQ_LEN +
967 BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP_LEN + 2 +
968 4 + fws->drvr->hdrlen;
969 skb = brcmu_pkt_buf_get_skb(len);
973 skcb = brcmf_skbcb(skb);
975 skcb->state = BRCMF_FWS_SKBSTATE_TIM;
978 data_offset = brcmf_fws_hdrpush(fws, skb);
979 ifidx = brcmf_skb_if_flags_get_field(skb, INDEX);
980 brcmf_fws_unlock(fws);
981 err = brcmf_proto_txdata(fws->drvr, ifidx, data_offset, skb);
984 brcmu_pkt_buf_free_skb(skb);
991 brcmf_fws_flow_control_check(struct brcmf_fws_info *fws, struct pktq *pq,
994 struct brcmf_if *ifp = brcmf_get_ifp(fws->drvr, if_id);
999 if ((ifp->netif_stop & BRCMF_NETIF_STOP_REASON_FWS_FC) &&
1000 pq->len <= BRCMF_FWS_FLOWCONTROL_LOWATER)
1001 brcmf_txflowblock_if(ifp,
1002 BRCMF_NETIF_STOP_REASON_FWS_FC, false);
1003 if (!(ifp->netif_stop & BRCMF_NETIF_STOP_REASON_FWS_FC) &&
1004 pq->len >= BRCMF_FWS_FLOWCONTROL_HIWATER) {
1005 fws->stats.fws_flow_block++;
1006 brcmf_txflowblock_if(ifp, BRCMF_NETIF_STOP_REASON_FWS_FC, true);
1011 static int brcmf_fws_rssi_indicate(struct brcmf_fws_info *fws, s8 rssi)
1013 brcmf_dbg(CTL, "rssi %d\n", rssi);
1018 int brcmf_fws_macdesc_indicate(struct brcmf_fws_info *fws, u8 type, u8 *data)
1020 struct brcmf_fws_mac_descriptor *entry, *existing;
1025 mac_handle = *data++;
1029 entry = &fws->desc.nodes[mac_handle & 0x1F];
1030 if (type == BRCMF_FWS_TYPE_MACDESC_DEL) {
1031 if (entry->occupied) {
1032 brcmf_dbg(TRACE, "deleting %s mac %pM\n",
1034 brcmf_fws_lock(fws);
1035 brcmf_fws_macdesc_cleanup(fws, entry, -1);
1036 brcmf_fws_macdesc_deinit(entry);
1037 brcmf_fws_unlock(fws);
1039 fws->stats.mac_update_failed++;
1043 existing = brcmf_fws_macdesc_lookup(fws, addr);
1044 if (IS_ERR(existing)) {
1045 if (!entry->occupied) {
1046 brcmf_fws_lock(fws);
1047 entry->mac_handle = mac_handle;
1048 brcmf_fws_macdesc_init(entry, addr, ifidx);
1049 brcmf_fws_macdesc_set_name(fws, entry);
1050 brcmu_pktq_init(&entry->psq, BRCMF_FWS_PSQ_PREC_COUNT,
1052 brcmf_fws_unlock(fws);
1053 brcmf_dbg(TRACE, "add %s mac %pM\n", entry->name, addr);
1055 fws->stats.mac_update_failed++;
1058 if (entry != existing) {
1059 brcmf_dbg(TRACE, "copy mac %s\n", existing->name);
1060 brcmf_fws_lock(fws);
1061 memcpy(entry, existing,
1062 offsetof(struct brcmf_fws_mac_descriptor, psq));
1063 entry->mac_handle = mac_handle;
1064 brcmf_fws_macdesc_deinit(existing);
1065 brcmf_fws_macdesc_set_name(fws, entry);
1066 brcmf_fws_unlock(fws);
1067 brcmf_dbg(TRACE, "relocate %s mac %pM\n", entry->name,
1070 brcmf_dbg(TRACE, "use existing\n");
1071 WARN_ON(entry->mac_handle != mac_handle);
1072 /* TODO: what should we do here: continue, reinit, .. */
1078 static int brcmf_fws_macdesc_state_indicate(struct brcmf_fws_info *fws,
1081 struct brcmf_fws_mac_descriptor *entry;
1085 mac_handle = data[0];
1086 entry = &fws->desc.nodes[mac_handle & 0x1F];
1087 if (!entry->occupied) {
1088 fws->stats.mac_ps_update_failed++;
1091 brcmf_fws_lock(fws);
1092 /* a state update should wipe old credits */
1093 entry->requested_credit = 0;
1094 entry->requested_packet = 0;
1095 if (type == BRCMF_FWS_TYPE_MAC_OPEN) {
1096 entry->state = BRCMF_FWS_STATE_OPEN;
1097 ret = BRCMF_FWS_RET_OK_SCHEDULE;
1099 entry->state = BRCMF_FWS_STATE_CLOSE;
1100 brcmf_fws_tim_update(fws, entry, BRCMF_FWS_FIFO_AC_BK, false);
1101 brcmf_fws_tim_update(fws, entry, BRCMF_FWS_FIFO_AC_BE, false);
1102 brcmf_fws_tim_update(fws, entry, BRCMF_FWS_FIFO_AC_VI, false);
1103 brcmf_fws_tim_update(fws, entry, BRCMF_FWS_FIFO_AC_VO, true);
1104 ret = BRCMF_FWS_RET_OK_NOSCHEDULE;
1106 brcmf_fws_unlock(fws);
1110 static int brcmf_fws_interface_state_indicate(struct brcmf_fws_info *fws,
1113 struct brcmf_fws_mac_descriptor *entry;
1119 if (ifidx >= BRCMF_MAX_IFS) {
1124 entry = &fws->desc.iface[ifidx];
1125 if (!entry->occupied) {
1130 brcmf_dbg(TRACE, "%s (%d): %s\n", brcmf_fws_get_tlv_name(type), type,
1132 brcmf_fws_lock(fws);
1134 case BRCMF_FWS_TYPE_INTERFACE_OPEN:
1135 entry->state = BRCMF_FWS_STATE_OPEN;
1136 ret = BRCMF_FWS_RET_OK_SCHEDULE;
1138 case BRCMF_FWS_TYPE_INTERFACE_CLOSE:
1139 entry->state = BRCMF_FWS_STATE_CLOSE;
1140 ret = BRCMF_FWS_RET_OK_NOSCHEDULE;
1144 brcmf_fws_unlock(fws);
1147 brcmf_fws_unlock(fws);
1151 fws->stats.if_update_failed++;
1155 static int brcmf_fws_request_indicate(struct brcmf_fws_info *fws, u8 type,
1158 struct brcmf_fws_mac_descriptor *entry;
1160 entry = &fws->desc.nodes[data[1] & 0x1F];
1161 if (!entry->occupied) {
1162 if (type == BRCMF_FWS_TYPE_MAC_REQUEST_CREDIT)
1163 fws->stats.credit_request_failed++;
1165 fws->stats.packet_request_failed++;
1169 brcmf_dbg(TRACE, "%s (%d): %s cnt %d bmp %d\n",
1170 brcmf_fws_get_tlv_name(type), type, entry->name,
1172 brcmf_fws_lock(fws);
1173 if (type == BRCMF_FWS_TYPE_MAC_REQUEST_CREDIT)
1174 entry->requested_credit = data[0];
1176 entry->requested_packet = data[0];
1178 entry->ac_bitmap = data[2];
1179 brcmf_fws_unlock(fws);
1180 return BRCMF_FWS_RET_OK_SCHEDULE;
1184 brcmf_fws_macdesc_use_req_credit(struct brcmf_fws_mac_descriptor *entry,
1185 struct sk_buff *skb)
1187 if (entry->requested_credit > 0) {
1188 entry->requested_credit--;
1189 brcmf_skb_if_flags_set_field(skb, REQUESTED, 1);
1190 brcmf_skb_if_flags_set_field(skb, REQ_CREDIT, 1);
1191 if (entry->state != BRCMF_FWS_STATE_CLOSE)
1192 brcmf_err("requested credit set while mac not closed!\n");
1193 } else if (entry->requested_packet > 0) {
1194 entry->requested_packet--;
1195 brcmf_skb_if_flags_set_field(skb, REQUESTED, 1);
1196 brcmf_skb_if_flags_set_field(skb, REQ_CREDIT, 0);
1197 if (entry->state != BRCMF_FWS_STATE_CLOSE)
1198 brcmf_err("requested packet set while mac not closed!\n");
1200 brcmf_skb_if_flags_set_field(skb, REQUESTED, 0);
1201 brcmf_skb_if_flags_set_field(skb, REQ_CREDIT, 0);
1205 static void brcmf_fws_macdesc_return_req_credit(struct sk_buff *skb)
1207 struct brcmf_fws_mac_descriptor *entry = brcmf_skbcb(skb)->mac;
1209 if ((brcmf_skb_if_flags_get_field(skb, REQ_CREDIT)) &&
1210 (entry->state == BRCMF_FWS_STATE_CLOSE))
1211 entry->requested_credit++;
1214 static void brcmf_fws_return_credits(struct brcmf_fws_info *fws,
1215 u8 fifo, u8 credits)
1224 fws->fifo_credit_map |= 1 << fifo;
1226 if ((fifo == BRCMF_FWS_FIFO_AC_BE) &&
1227 (fws->credits_borrowed[0])) {
1228 for (lender_ac = BRCMF_FWS_FIFO_AC_VO; lender_ac >= 0;
1230 borrowed = &fws->credits_borrowed[lender_ac];
1232 fws->fifo_credit_map |= (1 << lender_ac);
1233 fifo_credit = &fws->fifo_credit[lender_ac];
1234 if (*borrowed >= credits) {
1235 *borrowed -= credits;
1236 *fifo_credit += credits;
1239 credits -= *borrowed;
1240 *fifo_credit += *borrowed;
1247 fws->fifo_credit[fifo] += credits;
1250 static void brcmf_fws_schedule_deq(struct brcmf_fws_info *fws)
1252 /* only schedule dequeue when there are credits for delayed traffic */
1253 if ((fws->fifo_credit_map & fws->fifo_delay_map) ||
1254 (!brcmf_fws_fc_active(fws) && fws->fifo_delay_map))
1255 queue_work(fws->fws_wq, &fws->fws_dequeue_work);
1258 static int brcmf_fws_enq(struct brcmf_fws_info *fws,
1259 enum brcmf_fws_skb_state state, int fifo,
1262 int prec = 2 * fifo;
1263 u32 *qfull_stat = &fws->stats.delayq_full_error;
1264 struct brcmf_fws_mac_descriptor *entry;
1266 struct sk_buff_head *queue;
1267 struct sk_buff *p_head;
1268 struct sk_buff *p_tail;
1272 entry = brcmf_skbcb(p)->mac;
1273 if (entry == NULL) {
1274 brcmf_err("no mac descriptor found for skb %p\n", p);
1278 brcmf_dbg(DATA, "enter: fifo %d skb %p\n", fifo, p);
1279 if (state == BRCMF_FWS_SKBSTATE_SUPPRESSED) {
1281 qfull_stat = &fws->stats.supprq_full_error;
1283 /* Fix out of order delivery of frames. Dont assume frame */
1284 /* can be inserted at the end, but look for correct position */
1286 if (pktq_full(pq) || pktq_pfull(pq, prec)) {
1290 queue = &pq->q[prec].skblist;
1292 p_head = skb_peek(queue);
1293 p_tail = skb_peek_tail(queue);
1294 fr_new = brcmf_skb_htod_tag_get_field(p, FREERUN);
1296 while (p_head != p_tail) {
1297 fr_compare = brcmf_skb_htod_tag_get_field(p_tail,
1299 /* be sure to handle wrap of 256 */
1300 if (((fr_new > fr_compare) &&
1301 ((fr_new - fr_compare) < 128)) ||
1302 ((fr_new < fr_compare) &&
1303 ((fr_compare - fr_new) > 128)))
1305 p_tail = skb_queue_prev(queue, p_tail);
1307 /* Position found. Determine what to do */
1308 if (p_tail == NULL) {
1310 __skb_queue_tail(queue, p);
1312 fr_compare = brcmf_skb_htod_tag_get_field(p_tail,
1314 if (((fr_new > fr_compare) &&
1315 ((fr_new - fr_compare) < 128)) ||
1316 ((fr_new < fr_compare) &&
1317 ((fr_compare - fr_new) > 128))) {
1319 __skb_queue_after(queue, p_tail, p);
1322 __skb_insert(p, p_tail->prev, p_tail, queue);
1326 /* Complete the counters and statistics */
1328 if (pq->hi_prec < prec)
1329 pq->hi_prec = (u8) prec;
1330 } else if (brcmu_pktq_penq(&entry->psq, prec, p) == NULL) {
1335 /* increment total enqueued packet count */
1336 fws->fifo_delay_map |= 1 << fifo;
1337 fws->fifo_enqpkt[fifo]++;
1339 /* update the sk_buff state */
1340 brcmf_skbcb(p)->state = state;
1343 * A packet has been pushed so update traffic
1344 * availability bitmap, if applicable
1346 brcmf_fws_tim_update(fws, entry, fifo, true);
1347 brcmf_fws_flow_control_check(fws, &entry->psq,
1348 brcmf_skb_if_flags_get_field(p, INDEX));
1352 static struct sk_buff *brcmf_fws_deq(struct brcmf_fws_info *fws, int fifo)
1354 struct brcmf_fws_mac_descriptor *table;
1355 struct brcmf_fws_mac_descriptor *entry;
1363 table = (struct brcmf_fws_mac_descriptor *)&fws->desc;
1364 num_nodes = sizeof(fws->desc) / sizeof(struct brcmf_fws_mac_descriptor);
1365 node_pos = fws->deq_node_pos[fifo];
1367 for (i = 0; i < num_nodes; i++) {
1368 entry = &table[(node_pos + i) % num_nodes];
1369 if (!entry->occupied ||
1370 brcmf_fws_macdesc_closed(fws, entry, fifo))
1373 if (entry->suppressed)
1377 p = brcmu_pktq_mdeq(&entry->psq, pmsk << (fifo * 2), &prec_out);
1379 if (entry->suppressed) {
1380 if (entry->suppr_transit_count)
1382 entry->suppressed = false;
1383 p = brcmu_pktq_mdeq(&entry->psq,
1384 1 << (fifo * 2), &prec_out);
1390 brcmf_fws_macdesc_use_req_credit(entry, p);
1392 /* move dequeue position to ensure fair round-robin */
1393 fws->deq_node_pos[fifo] = (node_pos + i + 1) % num_nodes;
1394 brcmf_fws_flow_control_check(fws, &entry->psq,
1395 brcmf_skb_if_flags_get_field(p,
1399 * A packet has been picked up, update traffic
1400 * availability bitmap, if applicable
1402 brcmf_fws_tim_update(fws, entry, fifo, false);
1405 * decrement total enqueued fifo packets and
1406 * clear delay bitmap if done.
1408 fws->fifo_enqpkt[fifo]--;
1409 if (fws->fifo_enqpkt[fifo] == 0)
1410 fws->fifo_delay_map &= ~(1 << fifo);
1415 brcmf_dbg(DATA, "exit: fifo %d skb %p\n", fifo, p);
1419 static int brcmf_fws_txstatus_suppressed(struct brcmf_fws_info *fws, int fifo,
1420 struct sk_buff *skb,
1421 u32 genbit, u16 seq)
1423 struct brcmf_fws_mac_descriptor *entry = brcmf_skbcb(skb)->mac;
1427 hslot = brcmf_skb_htod_tag_get_field(skb, HSLOT);
1429 /* this packet was suppressed */
1430 if (!entry->suppressed) {
1431 entry->suppressed = true;
1432 entry->suppr_transit_count = entry->transit_count;
1433 brcmf_dbg(DATA, "suppress %s: transit %d\n",
1434 entry->name, entry->transit_count);
1437 entry->generation = genbit;
1439 brcmf_skb_htod_tag_set_field(skb, GENERATION, genbit);
1440 brcmf_skbcb(skb)->htod_seq = seq;
1441 if (brcmf_skb_htod_seq_get_field(skb, FROMFW)) {
1442 brcmf_skb_htod_seq_set_field(skb, FROMDRV, 1);
1443 brcmf_skb_htod_seq_set_field(skb, FROMFW, 0);
1445 brcmf_skb_htod_seq_set_field(skb, FROMDRV, 0);
1447 ret = brcmf_fws_enq(fws, BRCMF_FWS_SKBSTATE_SUPPRESSED, fifo, skb);
1450 /* suppress q is full drop this packet */
1451 brcmf_fws_hanger_poppkt(&fws->hanger, hslot, &skb, true);
1453 /* Mark suppressed to avoid a double free during wlfc cleanup */
1454 brcmf_fws_hanger_mark_suppressed(&fws->hanger, hslot);
1461 brcmf_fws_txs_process(struct brcmf_fws_info *fws, u8 flags, u32 hslot,
1462 u32 genbit, u16 seq)
1466 bool remove_from_hanger = true;
1467 struct sk_buff *skb;
1468 struct brcmf_skbuff_cb *skcb;
1469 struct brcmf_fws_mac_descriptor *entry = NULL;
1470 struct brcmf_if *ifp;
1472 brcmf_dbg(DATA, "flags %d\n", flags);
1474 if (flags == BRCMF_FWS_TXSTATUS_DISCARD)
1475 fws->stats.txs_discard++;
1476 else if (flags == BRCMF_FWS_TXSTATUS_CORE_SUPPRESS) {
1477 fws->stats.txs_supp_core++;
1478 remove_from_hanger = false;
1479 } else if (flags == BRCMF_FWS_TXSTATUS_FW_PS_SUPPRESS) {
1480 fws->stats.txs_supp_ps++;
1481 remove_from_hanger = false;
1482 } else if (flags == BRCMF_FWS_TXSTATUS_FW_TOSSED)
1483 fws->stats.txs_tossed++;
1484 else if (flags == BRCMF_FWS_TXSTATUS_HOST_TOSSED)
1485 fws->stats.txs_host_tossed++;
1487 brcmf_err("unexpected txstatus\n");
1489 ret = brcmf_fws_hanger_poppkt(&fws->hanger, hslot, &skb,
1490 remove_from_hanger);
1492 brcmf_err("no packet in hanger slot: hslot=%d\n", hslot);
1496 skcb = brcmf_skbcb(skb);
1498 if (WARN_ON(!entry)) {
1499 brcmu_pkt_buf_free_skb(skb);
1502 entry->transit_count--;
1503 if (entry->suppressed && entry->suppr_transit_count)
1504 entry->suppr_transit_count--;
1506 brcmf_dbg(DATA, "%s flags %d htod %X seq %X\n", entry->name, flags,
1509 /* pick up the implicit credit from this packet */
1510 fifo = brcmf_skb_htod_tag_get_field(skb, FIFO);
1511 if ((fws->fcmode == BRCMF_FWS_FCMODE_IMPLIED_CREDIT) ||
1512 (brcmf_skb_if_flags_get_field(skb, REQ_CREDIT)) ||
1513 (flags == BRCMF_FWS_TXSTATUS_HOST_TOSSED)) {
1514 brcmf_fws_return_credits(fws, fifo, 1);
1515 brcmf_fws_schedule_deq(fws);
1517 brcmf_fws_macdesc_return_req_credit(skb);
1519 ret = brcmf_proto_hdrpull(fws->drvr, false, skb, &ifp);
1521 brcmu_pkt_buf_free_skb(skb);
1524 if (!remove_from_hanger)
1525 ret = brcmf_fws_txstatus_suppressed(fws, fifo, skb,
1527 if (remove_from_hanger || ret)
1528 brcmf_txfinalize(ifp, skb, true);
1533 static int brcmf_fws_fifocreditback_indicate(struct brcmf_fws_info *fws,
1538 if (fws->fcmode != BRCMF_FWS_FCMODE_EXPLICIT_CREDIT) {
1539 brcmf_dbg(INFO, "ignored\n");
1540 return BRCMF_FWS_RET_OK_NOSCHEDULE;
1543 brcmf_dbg(DATA, "enter: data %pM\n", data);
1544 brcmf_fws_lock(fws);
1545 for (i = 0; i < BRCMF_FWS_FIFO_COUNT; i++)
1546 brcmf_fws_return_credits(fws, i, data[i]);
1548 brcmf_dbg(DATA, "map: credit %x delay %x\n", fws->fifo_credit_map,
1549 fws->fifo_delay_map);
1550 brcmf_fws_unlock(fws);
1551 return BRCMF_FWS_RET_OK_SCHEDULE;
1554 static int brcmf_fws_txstatus_indicate(struct brcmf_fws_info *fws, u8 *data)
1564 fws->stats.txs_indicate++;
1565 memcpy(&status_le, data, sizeof(status_le));
1566 status = le32_to_cpu(status_le);
1567 flags = brcmf_txstatus_get_field(status, FLAGS);
1568 hslot = brcmf_txstatus_get_field(status, HSLOT);
1569 genbit = brcmf_txstatus_get_field(status, GENERATION);
1570 if (BRCMF_FWS_MODE_GET_REUSESEQ(fws->mode)) {
1571 memcpy(&seq_le, &data[BRCMF_FWS_TYPE_PKTTAG_LEN],
1573 seq = le16_to_cpu(seq_le);
1578 brcmf_fws_lock(fws);
1579 brcmf_fws_txs_process(fws, flags, hslot, genbit, seq);
1580 brcmf_fws_unlock(fws);
1581 return BRCMF_FWS_RET_OK_NOSCHEDULE;
1584 static int brcmf_fws_dbg_seqnum_check(struct brcmf_fws_info *fws, u8 *data)
1588 memcpy(×tamp, &data[2], sizeof(timestamp));
1589 brcmf_dbg(CTL, "received: seq %d, timestamp %d\n", data[1],
1590 le32_to_cpu(timestamp));
1594 static int brcmf_fws_notify_credit_map(struct brcmf_if *ifp,
1595 const struct brcmf_event_msg *e,
1598 struct brcmf_fws_info *fws = drvr_to_fws(ifp->drvr);
1602 if (e->datalen < BRCMF_FWS_FIFO_COUNT) {
1603 brcmf_err("event payload too small (%d)\n", e->datalen);
1606 if (fws->creditmap_received)
1609 fws->creditmap_received = true;
1611 brcmf_dbg(TRACE, "enter: credits %pM\n", credits);
1612 brcmf_fws_lock(fws);
1613 for (i = 0; i < ARRAY_SIZE(fws->fifo_credit); i++) {
1615 fws->fifo_credit_map |= 1 << i;
1617 fws->fifo_credit_map &= ~(1 << i);
1618 fws->fifo_credit[i] = *credits++;
1620 brcmf_fws_schedule_deq(fws);
1621 brcmf_fws_unlock(fws);
1625 static int brcmf_fws_notify_bcmc_credit_support(struct brcmf_if *ifp,
1626 const struct brcmf_event_msg *e,
1629 struct brcmf_fws_info *fws = drvr_to_fws(ifp->drvr);
1632 brcmf_fws_lock(fws);
1633 fws->bcmc_credit_check = true;
1634 brcmf_fws_unlock(fws);
1639 static void brcmf_rxreorder_get_skb_list(struct brcmf_ampdu_rx_reorder *rfi,
1641 struct sk_buff_head *skb_list)
1643 /* initialize return list */
1644 __skb_queue_head_init(skb_list);
1646 if (rfi->pend_pkts == 0) {
1647 brcmf_dbg(INFO, "no packets in reorder queue\n");
1652 if (rfi->pktslots[start]) {
1653 __skb_queue_tail(skb_list, rfi->pktslots[start]);
1654 rfi->pktslots[start] = NULL;
1657 if (start > rfi->max_idx)
1659 } while (start != end);
1660 rfi->pend_pkts -= skb_queue_len(skb_list);
1663 void brcmf_fws_rxreorder(struct brcmf_if *ifp, struct sk_buff *pkt)
1666 u8 flow_id, max_idx, cur_idx, exp_idx, end_idx;
1667 struct brcmf_ampdu_rx_reorder *rfi;
1668 struct sk_buff_head reorder_list;
1669 struct sk_buff *pnext;
1673 reorder_data = ((struct brcmf_skb_reorder_data *)pkt->cb)->reorder;
1674 flow_id = reorder_data[BRCMF_RXREORDER_FLOWID_OFFSET];
1675 flags = reorder_data[BRCMF_RXREORDER_FLAGS_OFFSET];
1677 /* validate flags and flow id */
1678 if (flags == 0xFF) {
1679 brcmf_err("invalid flags...so ignore this packet\n");
1680 brcmf_netif_rx(ifp, pkt);
1684 rfi = ifp->drvr->reorder_flows[flow_id];
1685 if (flags & BRCMF_RXREORDER_DEL_FLOW) {
1686 brcmf_dbg(INFO, "flow-%d: delete\n",
1690 brcmf_dbg(INFO, "received flags to cleanup, but no flow (%d) yet\n",
1692 brcmf_netif_rx(ifp, pkt);
1696 brcmf_rxreorder_get_skb_list(rfi, rfi->exp_idx, rfi->exp_idx,
1698 /* add the last packet */
1699 __skb_queue_tail(&reorder_list, pkt);
1701 ifp->drvr->reorder_flows[flow_id] = NULL;
1704 /* from here on we need a flow reorder instance */
1706 buf_size = sizeof(*rfi);
1707 max_idx = reorder_data[BRCMF_RXREORDER_MAXIDX_OFFSET];
1709 buf_size += (max_idx + 1) * sizeof(pkt);
1711 /* allocate space for flow reorder info */
1712 brcmf_dbg(INFO, "flow-%d: start, maxidx %d\n",
1714 rfi = kzalloc(buf_size, GFP_ATOMIC);
1716 brcmf_err("failed to alloc buffer\n");
1717 brcmf_netif_rx(ifp, pkt);
1721 ifp->drvr->reorder_flows[flow_id] = rfi;
1722 rfi->pktslots = (struct sk_buff **)(rfi + 1);
1723 rfi->max_idx = max_idx;
1725 if (flags & BRCMF_RXREORDER_NEW_HOLE) {
1726 if (rfi->pend_pkts) {
1727 brcmf_rxreorder_get_skb_list(rfi, rfi->exp_idx,
1730 WARN_ON(rfi->pend_pkts);
1732 __skb_queue_head_init(&reorder_list);
1734 rfi->cur_idx = reorder_data[BRCMF_RXREORDER_CURIDX_OFFSET];
1735 rfi->exp_idx = reorder_data[BRCMF_RXREORDER_EXPIDX_OFFSET];
1736 rfi->max_idx = reorder_data[BRCMF_RXREORDER_MAXIDX_OFFSET];
1737 rfi->pktslots[rfi->cur_idx] = pkt;
1739 brcmf_dbg(DATA, "flow-%d: new hole %d (%d), pending %d\n",
1740 flow_id, rfi->cur_idx, rfi->exp_idx, rfi->pend_pkts);
1741 } else if (flags & BRCMF_RXREORDER_CURIDX_VALID) {
1742 cur_idx = reorder_data[BRCMF_RXREORDER_CURIDX_OFFSET];
1743 exp_idx = reorder_data[BRCMF_RXREORDER_EXPIDX_OFFSET];
1745 if ((exp_idx == rfi->exp_idx) && (cur_idx != rfi->exp_idx)) {
1746 /* still in the current hole */
1747 /* enqueue the current on the buffer chain */
1748 if (rfi->pktslots[cur_idx] != NULL) {
1749 brcmf_dbg(INFO, "HOLE: ERROR buffer pending..free it\n");
1750 brcmu_pkt_buf_free_skb(rfi->pktslots[cur_idx]);
1751 rfi->pktslots[cur_idx] = NULL;
1753 rfi->pktslots[cur_idx] = pkt;
1755 rfi->cur_idx = cur_idx;
1756 brcmf_dbg(DATA, "flow-%d: store pkt %d (%d), pending %d\n",
1757 flow_id, cur_idx, exp_idx, rfi->pend_pkts);
1759 /* can return now as there is no reorder
1764 if (rfi->exp_idx == cur_idx) {
1765 if (rfi->pktslots[cur_idx] != NULL) {
1766 brcmf_dbg(INFO, "error buffer pending..free it\n");
1767 brcmu_pkt_buf_free_skb(rfi->pktslots[cur_idx]);
1768 rfi->pktslots[cur_idx] = NULL;
1770 rfi->pktslots[cur_idx] = pkt;
1773 /* got the expected one. flush from current to expected
1774 * and update expected
1776 brcmf_dbg(DATA, "flow-%d: expected %d (%d), pending %d\n",
1777 flow_id, cur_idx, exp_idx, rfi->pend_pkts);
1779 rfi->cur_idx = cur_idx;
1780 rfi->exp_idx = exp_idx;
1782 brcmf_rxreorder_get_skb_list(rfi, cur_idx, exp_idx,
1784 brcmf_dbg(DATA, "flow-%d: freeing buffers %d, pending %d\n",
1785 flow_id, skb_queue_len(&reorder_list),
1790 brcmf_dbg(DATA, "flow-%d (0x%x): both moved, old %d/%d, new %d/%d\n",
1791 flow_id, flags, rfi->cur_idx, rfi->exp_idx,
1793 if (flags & BRCMF_RXREORDER_FLUSH_ALL)
1794 end_idx = rfi->exp_idx;
1798 /* flush pkts first */
1799 brcmf_rxreorder_get_skb_list(rfi, rfi->exp_idx, end_idx,
1802 if (exp_idx == ((cur_idx + 1) % (rfi->max_idx + 1))) {
1803 __skb_queue_tail(&reorder_list, pkt);
1805 rfi->pktslots[cur_idx] = pkt;
1808 rfi->exp_idx = exp_idx;
1809 rfi->cur_idx = cur_idx;
1812 /* explicity window move updating the expected index */
1813 exp_idx = reorder_data[BRCMF_RXREORDER_EXPIDX_OFFSET];
1815 brcmf_dbg(DATA, "flow-%d (0x%x): change expected: %d -> %d\n",
1816 flow_id, flags, rfi->exp_idx, exp_idx);
1817 if (flags & BRCMF_RXREORDER_FLUSH_ALL)
1818 end_idx = rfi->exp_idx;
1822 brcmf_rxreorder_get_skb_list(rfi, rfi->exp_idx, end_idx,
1824 __skb_queue_tail(&reorder_list, pkt);
1825 /* set the new expected idx */
1826 rfi->exp_idx = exp_idx;
1829 skb_queue_walk_safe(&reorder_list, pkt, pnext) {
1830 __skb_unlink(pkt, &reorder_list);
1831 brcmf_netif_rx(ifp, pkt);
1835 void brcmf_fws_hdrpull(struct brcmf_if *ifp, s16 siglen, struct sk_buff *skb)
1837 struct brcmf_skb_reorder_data *rd;
1838 struct brcmf_fws_info *fws = drvr_to_fws(ifp->drvr);
1847 brcmf_dbg(HDRS, "enter: ifidx %d, skblen %u, sig %d\n",
1848 ifp->ifidx, skb->len, siglen);
1850 WARN_ON(siglen > skb->len);
1854 /* if flow control disabled, skip to packet data and leave */
1855 if ((!fws) || (!fws->fw_signals)) {
1856 skb_pull(skb, siglen);
1860 fws->stats.header_pulls++;
1862 signal_data = skb->data;
1864 status = BRCMF_FWS_RET_OK_NOSCHEDULE;
1865 while (data_len > 0) {
1866 /* extract tlv info */
1867 type = signal_data[0];
1869 /* FILLER type is actually not a TLV, but
1870 * a single byte that can be skipped.
1872 if (type == BRCMF_FWS_TYPE_FILLER) {
1877 len = signal_data[1];
1878 data = signal_data + 2;
1880 brcmf_dbg(HDRS, "tlv type=%s (%d), len=%d (%d)\n",
1881 brcmf_fws_get_tlv_name(type), type, len,
1882 brcmf_fws_get_tlv_len(fws, type));
1884 /* abort parsing when length invalid */
1885 if (data_len < len + 2)
1888 if (len < brcmf_fws_get_tlv_len(fws, type))
1891 err = BRCMF_FWS_RET_OK_NOSCHEDULE;
1893 case BRCMF_FWS_TYPE_COMP_TXSTATUS:
1895 case BRCMF_FWS_TYPE_HOST_REORDER_RXPKTS:
1896 rd = (struct brcmf_skb_reorder_data *)skb->cb;
1899 case BRCMF_FWS_TYPE_MACDESC_ADD:
1900 case BRCMF_FWS_TYPE_MACDESC_DEL:
1901 brcmf_fws_macdesc_indicate(fws, type, data);
1903 case BRCMF_FWS_TYPE_MAC_OPEN:
1904 case BRCMF_FWS_TYPE_MAC_CLOSE:
1905 err = brcmf_fws_macdesc_state_indicate(fws, type, data);
1907 case BRCMF_FWS_TYPE_INTERFACE_OPEN:
1908 case BRCMF_FWS_TYPE_INTERFACE_CLOSE:
1909 err = brcmf_fws_interface_state_indicate(fws, type,
1912 case BRCMF_FWS_TYPE_MAC_REQUEST_CREDIT:
1913 case BRCMF_FWS_TYPE_MAC_REQUEST_PACKET:
1914 err = brcmf_fws_request_indicate(fws, type, data);
1916 case BRCMF_FWS_TYPE_TXSTATUS:
1917 brcmf_fws_txstatus_indicate(fws, data);
1919 case BRCMF_FWS_TYPE_FIFO_CREDITBACK:
1920 err = brcmf_fws_fifocreditback_indicate(fws, data);
1922 case BRCMF_FWS_TYPE_RSSI:
1923 brcmf_fws_rssi_indicate(fws, *data);
1925 case BRCMF_FWS_TYPE_TRANS_ID:
1926 brcmf_fws_dbg_seqnum_check(fws, data);
1928 case BRCMF_FWS_TYPE_PKTTAG:
1929 case BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP:
1931 fws->stats.tlv_invalid_type++;
1934 if (err == BRCMF_FWS_RET_OK_SCHEDULE)
1935 status = BRCMF_FWS_RET_OK_SCHEDULE;
1936 signal_data += len + 2;
1937 data_len -= len + 2;
1941 fws->stats.tlv_parse_failed++;
1943 if (status == BRCMF_FWS_RET_OK_SCHEDULE)
1944 brcmf_fws_schedule_deq(fws);
1946 /* signalling processing result does
1947 * not affect the actual ethernet packet.
1949 skb_pull(skb, siglen);
1951 /* this may be a signal-only packet
1954 fws->stats.header_only_pkt++;
1957 static u8 brcmf_fws_precommit_skb(struct brcmf_fws_info *fws, int fifo,
1960 struct brcmf_skbuff_cb *skcb = brcmf_skbcb(p);
1961 struct brcmf_fws_mac_descriptor *entry = skcb->mac;
1964 if (skcb->state != BRCMF_FWS_SKBSTATE_SUPPRESSED)
1965 brcmf_skb_htod_tag_set_field(p, GENERATION, entry->generation);
1966 flags = BRCMF_FWS_HTOD_FLAG_PKTFROMHOST;
1967 if (brcmf_skb_if_flags_get_field(p, REQUESTED)) {
1969 * Indicate that this packet is being sent in response to an
1970 * explicit request from the firmware side.
1972 flags |= BRCMF_FWS_HTOD_FLAG_PKT_REQUESTED;
1974 brcmf_skb_htod_tag_set_field(p, FLAGS, flags);
1975 return brcmf_fws_hdrpush(fws, p);
1978 static void brcmf_fws_rollback_toq(struct brcmf_fws_info *fws,
1979 struct sk_buff *skb, int fifo)
1981 struct brcmf_fws_mac_descriptor *entry;
1982 struct sk_buff *pktout;
1986 entry = brcmf_skbcb(skb)->mac;
1987 if (entry->occupied) {
1989 if (brcmf_skbcb(skb)->state == BRCMF_FWS_SKBSTATE_SUPPRESSED)
1992 pktout = brcmu_pktq_penq_head(&entry->psq, qidx, skb);
1993 if (pktout == NULL) {
1994 brcmf_err("%s queue %d full\n", entry->name, qidx);
1998 brcmf_err("%s entry removed\n", entry->name);
2003 fws->stats.rollback_failed++;
2004 hslot = brcmf_skb_htod_tag_get_field(skb, HSLOT);
2005 brcmf_fws_txs_process(fws, BRCMF_FWS_TXSTATUS_HOST_TOSSED,
2008 fws->stats.rollback_success++;
2009 brcmf_fws_return_credits(fws, fifo, 1);
2010 brcmf_fws_macdesc_return_req_credit(skb);
2014 static int brcmf_fws_borrow_credit(struct brcmf_fws_info *fws)
2018 if (time_after(fws->borrow_defer_timestamp, jiffies)) {
2019 fws->fifo_credit_map &= ~(1 << BRCMF_FWS_FIFO_AC_BE);
2023 for (lender_ac = 0; lender_ac <= BRCMF_FWS_FIFO_AC_VO; lender_ac++) {
2024 if (fws->fifo_credit[lender_ac]) {
2025 fws->credits_borrowed[lender_ac]++;
2026 fws->fifo_credit[lender_ac]--;
2027 if (fws->fifo_credit[lender_ac] == 0)
2028 fws->fifo_credit_map &= ~(1 << lender_ac);
2029 fws->fifo_credit_map |= (1 << BRCMF_FWS_FIFO_AC_BE);
2030 brcmf_dbg(DATA, "borrow credit from: %d\n", lender_ac);
2034 fws->fifo_credit_map &= ~(1 << BRCMF_FWS_FIFO_AC_BE);
2038 static int brcmf_fws_commit_skb(struct brcmf_fws_info *fws, int fifo,
2039 struct sk_buff *skb)
2041 struct brcmf_skbuff_cb *skcb = brcmf_skbcb(skb);
2042 struct brcmf_fws_mac_descriptor *entry;
2049 return PTR_ERR(entry);
2051 data_offset = brcmf_fws_precommit_skb(fws, fifo, skb);
2052 entry->transit_count++;
2053 if (entry->suppressed)
2054 entry->suppr_transit_count++;
2055 ifidx = brcmf_skb_if_flags_get_field(skb, INDEX);
2056 brcmf_fws_unlock(fws);
2057 rc = brcmf_proto_txdata(fws->drvr, ifidx, data_offset, skb);
2058 brcmf_fws_lock(fws);
2059 brcmf_dbg(DATA, "%s flags %X htod %X bus_tx %d\n", entry->name,
2060 skcb->if_flags, skcb->htod, rc);
2062 entry->transit_count--;
2063 if (entry->suppressed)
2064 entry->suppr_transit_count--;
2065 (void)brcmf_proto_hdrpull(fws->drvr, false, skb, NULL);
2069 fws->stats.pkt2bus++;
2070 fws->stats.send_pkts[fifo]++;
2071 if (brcmf_skb_if_flags_get_field(skb, REQUESTED))
2072 fws->stats.requested_sent[fifo]++;
2077 brcmf_fws_rollback_toq(fws, skb, fifo);
2081 static int brcmf_fws_assign_htod(struct brcmf_fws_info *fws, struct sk_buff *p,
2084 struct brcmf_skbuff_cb *skcb = brcmf_skbcb(p);
2089 hslot = brcmf_fws_hanger_get_free_slot(&fws->hanger);
2090 brcmf_skb_htod_tag_set_field(p, HSLOT, hslot);
2091 brcmf_skb_htod_tag_set_field(p, FREERUN, skcb->mac->seq[fifo]);
2092 brcmf_skb_htod_tag_set_field(p, FIFO, fifo);
2093 rc = brcmf_fws_hanger_pushpkt(&fws->hanger, p, hslot);
2095 skcb->mac->seq[fifo]++;
2097 fws->stats.generic_error++;
2101 int brcmf_fws_process_skb(struct brcmf_if *ifp, struct sk_buff *skb)
2103 struct brcmf_fws_info *fws = drvr_to_fws(ifp->drvr);
2104 struct brcmf_skbuff_cb *skcb = brcmf_skbcb(skb);
2105 struct ethhdr *eh = (struct ethhdr *)(skb->data);
2106 int fifo = BRCMF_FWS_FIFO_BCMC;
2107 bool multicast = is_multicast_ether_addr(eh->h_dest);
2110 brcmf_dbg(DATA, "tx proto=0x%X\n", ntohs(eh->h_proto));
2112 /* set control buffer information */
2114 skcb->state = BRCMF_FWS_SKBSTATE_NEW;
2115 brcmf_skb_if_flags_set_field(skb, INDEX, ifp->ifidx);
2117 fifo = brcmf_fws_prio2fifo[skb->priority];
2119 brcmf_fws_lock(fws);
2120 if (fifo != BRCMF_FWS_FIFO_AC_BE && fifo < BRCMF_FWS_FIFO_BCMC)
2121 fws->borrow_defer_timestamp = jiffies +
2122 BRCMF_FWS_BORROW_DEFER_PERIOD;
2124 skcb->mac = brcmf_fws_macdesc_find(fws, ifp, eh->h_dest);
2125 brcmf_dbg(DATA, "%s mac %pM multi %d fifo %d\n", skcb->mac->name,
2126 eh->h_dest, multicast, fifo);
2127 if (!brcmf_fws_assign_htod(fws, skb, fifo)) {
2128 brcmf_fws_enq(fws, BRCMF_FWS_SKBSTATE_DELAYED, fifo, skb);
2129 brcmf_fws_schedule_deq(fws);
2131 brcmf_err("drop skb: no hanger slot\n");
2132 brcmf_txfinalize(ifp, skb, false);
2135 brcmf_fws_unlock(fws);
2140 void brcmf_fws_reset_interface(struct brcmf_if *ifp)
2142 struct brcmf_fws_mac_descriptor *entry = ifp->fws_desc;
2144 brcmf_dbg(TRACE, "enter: bsscfgidx=%d\n", ifp->bsscfgidx);
2148 brcmf_fws_macdesc_init(entry, ifp->mac_addr, ifp->ifidx);
2151 void brcmf_fws_add_interface(struct brcmf_if *ifp)
2153 struct brcmf_fws_info *fws = drvr_to_fws(ifp->drvr);
2154 struct brcmf_fws_mac_descriptor *entry;
2156 if (!ifp->ndev || !brcmf_fws_queue_skbs(fws))
2159 entry = &fws->desc.iface[ifp->ifidx];
2160 ifp->fws_desc = entry;
2161 brcmf_fws_macdesc_init(entry, ifp->mac_addr, ifp->ifidx);
2162 brcmf_fws_macdesc_set_name(fws, entry);
2163 brcmu_pktq_init(&entry->psq, BRCMF_FWS_PSQ_PREC_COUNT,
2165 brcmf_dbg(TRACE, "added %s\n", entry->name);
2168 void brcmf_fws_del_interface(struct brcmf_if *ifp)
2170 struct brcmf_fws_mac_descriptor *entry = ifp->fws_desc;
2171 struct brcmf_fws_info *fws = drvr_to_fws(ifp->drvr);
2176 brcmf_fws_lock(fws);
2177 ifp->fws_desc = NULL;
2178 brcmf_dbg(TRACE, "deleting %s\n", entry->name);
2179 brcmf_fws_macdesc_cleanup(fws, &fws->desc.iface[ifp->ifidx],
2181 brcmf_fws_macdesc_deinit(entry);
2182 brcmf_fws_cleanup(fws, ifp->ifidx);
2183 brcmf_fws_unlock(fws);
2186 static void brcmf_fws_dequeue_worker(struct work_struct *worker)
2188 struct brcmf_fws_info *fws;
2189 struct brcmf_pub *drvr;
2190 struct sk_buff *skb;
2196 fws = container_of(worker, struct brcmf_fws_info, fws_dequeue_work);
2199 brcmf_fws_lock(fws);
2200 for (fifo = BRCMF_FWS_FIFO_BCMC; fifo >= 0 && !fws->bus_flow_blocked;
2202 if (!brcmf_fws_fc_active(fws)) {
2203 while ((skb = brcmf_fws_deq(fws, fifo)) != NULL) {
2204 hslot = brcmf_skb_htod_tag_get_field(skb,
2206 brcmf_fws_hanger_poppkt(&fws->hanger, hslot,
2208 ifidx = brcmf_skb_if_flags_get_field(skb,
2210 /* Use proto layer to send data frame */
2211 brcmf_fws_unlock(fws);
2212 ret = brcmf_proto_txdata(drvr, ifidx, 0, skb);
2213 brcmf_fws_lock(fws);
2215 brcmf_txfinalize(brcmf_get_ifp(drvr,
2218 if (fws->bus_flow_blocked)
2223 while ((fws->fifo_credit[fifo]) || ((!fws->bcmc_credit_check) &&
2224 (fifo == BRCMF_FWS_FIFO_BCMC))) {
2225 skb = brcmf_fws_deq(fws, fifo);
2228 fws->fifo_credit[fifo]--;
2229 if (brcmf_fws_commit_skb(fws, fifo, skb))
2231 if (fws->bus_flow_blocked)
2234 if ((fifo == BRCMF_FWS_FIFO_AC_BE) &&
2235 (fws->fifo_credit[fifo] == 0) &&
2236 (!fws->bus_flow_blocked)) {
2237 while (brcmf_fws_borrow_credit(fws) == 0) {
2238 skb = brcmf_fws_deq(fws, fifo);
2240 brcmf_fws_return_credits(fws, fifo, 1);
2243 if (brcmf_fws_commit_skb(fws, fifo, skb))
2245 if (fws->bus_flow_blocked)
2250 brcmf_fws_unlock(fws);
2254 static int brcmf_debugfs_fws_stats_read(struct seq_file *seq, void *data)
2256 struct brcmf_bus *bus_if = dev_get_drvdata(seq->private);
2257 struct brcmf_fws_stats *fwstats = &(drvr_to_fws(bus_if->drvr)->stats);
2260 "header_pulls: %u\n"
2261 "header_only_pkt: %u\n"
2262 "tlv_parse_failed: %u\n"
2263 "tlv_invalid_type: %u\n"
2264 "mac_update_fails: %u\n"
2265 "ps_update_fails: %u\n"
2266 "if_update_fails: %u\n"
2268 "generic_error: %u\n"
2269 "rollback_success: %u\n"
2270 "rollback_failed: %u\n"
2273 "txs_indicate: %u\n"
2275 "txs_suppr_core: %u\n"
2276 "txs_suppr_ps: %u\n"
2278 "txs_host_tossed: %u\n"
2279 "bus_flow_block: %u\n"
2280 "fws_flow_block: %u\n"
2281 "send_pkts: BK:%u BE:%u VO:%u VI:%u BCMC:%u\n"
2282 "requested_sent: BK:%u BE:%u VO:%u VI:%u BCMC:%u\n",
2283 fwstats->header_pulls,
2284 fwstats->header_only_pkt,
2285 fwstats->tlv_parse_failed,
2286 fwstats->tlv_invalid_type,
2287 fwstats->mac_update_failed,
2288 fwstats->mac_ps_update_failed,
2289 fwstats->if_update_failed,
2291 fwstats->generic_error,
2292 fwstats->rollback_success,
2293 fwstats->rollback_failed,
2294 fwstats->delayq_full_error,
2295 fwstats->supprq_full_error,
2296 fwstats->txs_indicate,
2297 fwstats->txs_discard,
2298 fwstats->txs_supp_core,
2299 fwstats->txs_supp_ps,
2300 fwstats->txs_tossed,
2301 fwstats->txs_host_tossed,
2302 fwstats->bus_flow_block,
2303 fwstats->fws_flow_block,
2304 fwstats->send_pkts[0], fwstats->send_pkts[1],
2305 fwstats->send_pkts[2], fwstats->send_pkts[3],
2306 fwstats->send_pkts[4],
2307 fwstats->requested_sent[0],
2308 fwstats->requested_sent[1],
2309 fwstats->requested_sent[2],
2310 fwstats->requested_sent[3],
2311 fwstats->requested_sent[4]);
2316 static int brcmf_debugfs_fws_stats_read(struct seq_file *seq, void *data)
2322 struct brcmf_fws_info *brcmf_fws_attach(struct brcmf_pub *drvr)
2324 struct brcmf_fws_info *fws;
2325 struct brcmf_if *ifp;
2326 u32 tlv = BRCMF_FWS_FLAGS_RSSI_SIGNALS;
2330 fws = kzalloc(sizeof(*fws), GFP_KERNEL);
2336 spin_lock_init(&fws->spinlock);
2338 /* store drvr reference */
2340 fws->fcmode = drvr->settings->fcmode;
2342 if ((drvr->bus_if->always_use_fws_queue == false) &&
2343 (fws->fcmode == BRCMF_FWS_FCMODE_NONE)) {
2344 fws->avoid_queueing = true;
2345 brcmf_dbg(INFO, "FWS queueing will be avoided\n");
2349 fws->fws_wq = create_singlethread_workqueue("brcmf_fws_wq");
2350 if (fws->fws_wq == NULL) {
2351 brcmf_err("workqueue creation failed\n");
2355 INIT_WORK(&fws->fws_dequeue_work, brcmf_fws_dequeue_worker);
2357 /* enable firmware signalling if fcmode active */
2358 if (fws->fcmode != BRCMF_FWS_FCMODE_NONE)
2359 tlv |= BRCMF_FWS_FLAGS_XONXOFF_SIGNALS |
2360 BRCMF_FWS_FLAGS_CREDIT_STATUS_SIGNALS |
2361 BRCMF_FWS_FLAGS_HOST_PROPTXSTATUS_ACTIVE |
2362 BRCMF_FWS_FLAGS_HOST_RXREORDER_ACTIVE;
2364 rc = brcmf_fweh_register(drvr, BRCMF_E_FIFO_CREDIT_MAP,
2365 brcmf_fws_notify_credit_map);
2367 brcmf_err("register credit map handler failed\n");
2370 rc = brcmf_fweh_register(drvr, BRCMF_E_BCMC_CREDIT_SUPPORT,
2371 brcmf_fws_notify_bcmc_credit_support);
2373 brcmf_err("register bcmc credit handler failed\n");
2374 brcmf_fweh_unregister(drvr, BRCMF_E_FIFO_CREDIT_MAP);
2378 /* Setting the iovar may fail if feature is unsupported
2379 * so leave the rc as is so driver initialization can
2380 * continue. Set mode back to none indicating not enabled.
2382 fws->fw_signals = true;
2383 ifp = brcmf_get_ifp(drvr, 0);
2384 if (brcmf_fil_iovar_int_set(ifp, "tlv", tlv)) {
2385 brcmf_err("failed to set bdcv2 tlv signaling\n");
2386 fws->fcmode = BRCMF_FWS_FCMODE_NONE;
2387 fws->fw_signals = false;
2390 if (brcmf_fil_iovar_int_set(ifp, "ampdu_hostreorder", 1))
2391 brcmf_dbg(INFO, "enabling AMPDU host-reorder failed\n");
2393 /* Enable seq number reuse, if supported */
2394 if (brcmf_fil_iovar_int_get(ifp, "wlfc_mode", &mode) == 0) {
2395 if (BRCMF_FWS_MODE_GET_REUSESEQ(mode)) {
2397 BRCMF_FWS_MODE_SET_REUSESEQ(mode, 1);
2398 if (brcmf_fil_iovar_int_set(ifp,
2399 "wlfc_mode", mode) == 0) {
2400 BRCMF_FWS_MODE_SET_REUSESEQ(fws->mode, 1);
2405 brcmf_fws_hanger_init(&fws->hanger);
2406 brcmf_fws_macdesc_init(&fws->desc.other, NULL, 0);
2407 brcmf_fws_macdesc_set_name(fws, &fws->desc.other);
2408 brcmf_dbg(INFO, "added %s\n", fws->desc.other.name);
2409 brcmu_pktq_init(&fws->desc.other.psq, BRCMF_FWS_PSQ_PREC_COUNT,
2412 brcmf_dbg(INFO, "%s bdcv2 tlv signaling [%x]\n",
2413 fws->fw_signals ? "enabled" : "disabled", tlv);
2417 brcmf_fws_detach_pre_delif(fws);
2418 brcmf_fws_detach_post_delif(fws);
2422 void brcmf_fws_detach_pre_delif(struct brcmf_fws_info *fws)
2427 destroy_workqueue(fws->fws_wq);
2432 void brcmf_fws_detach_post_delif(struct brcmf_fws_info *fws)
2438 brcmf_fws_lock(fws);
2439 brcmf_fws_cleanup(fws, -1);
2440 brcmf_fws_unlock(fws);
2442 /* free top structure */
2446 void brcmf_fws_debugfs_create(struct brcmf_pub *drvr)
2448 /* create debugfs file for statistics */
2449 brcmf_debugfs_add_entry(drvr, "fws_stats",
2450 brcmf_debugfs_fws_stats_read);
2453 bool brcmf_fws_queue_skbs(struct brcmf_fws_info *fws)
2455 return !fws->avoid_queueing;
2458 bool brcmf_fws_fc_active(struct brcmf_fws_info *fws)
2460 if (!fws->creditmap_received)
2463 return fws->fcmode != BRCMF_FWS_FCMODE_NONE;
2466 void brcmf_fws_bustxfail(struct brcmf_fws_info *fws, struct sk_buff *skb)
2470 if (brcmf_skbcb(skb)->state == BRCMF_FWS_SKBSTATE_TIM) {
2471 brcmu_pkt_buf_free_skb(skb);
2474 brcmf_fws_lock(fws);
2475 hslot = brcmf_skb_htod_tag_get_field(skb, HSLOT);
2476 brcmf_fws_txs_process(fws, BRCMF_FWS_TXSTATUS_HOST_TOSSED, hslot, 0, 0);
2477 brcmf_fws_unlock(fws);
2480 void brcmf_fws_bus_blocked(struct brcmf_pub *drvr, bool flow_blocked)
2482 struct brcmf_fws_info *fws = drvr_to_fws(drvr);
2483 struct brcmf_if *ifp;
2486 if (fws->avoid_queueing) {
2487 for (i = 0; i < BRCMF_MAX_IFS; i++) {
2488 ifp = drvr->iflist[i];
2489 if (!ifp || !ifp->ndev)
2491 brcmf_txflowblock_if(ifp, BRCMF_NETIF_STOP_REASON_FLOW,
2495 fws->bus_flow_blocked = flow_blocked;
2497 brcmf_fws_schedule_deq(fws);
2499 fws->stats.bus_flow_block++;