1 /*
2  * Copyright (c) 2004-2011 Atheros Communications Inc.
3  * Copyright (c) 2011 Qualcomm Atheros, Inc.
4  *
5  * Permission to use, copy, modify, and/or distribute this software for any
6  * purpose with or without fee is hereby granted, provided that the above
7  * copyright notice and this permission notice appear in all copies.
8  *
9  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16  */
17 
18 #ifndef HTC_H
19 #define HTC_H
20 
21 #include "common.h"
22 
23 /* frame header flags */
24 
25 /* send direction */
26 #define HTC_FLAGS_NEED_CREDIT_UPDATE (1 << 0)
27 #define HTC_FLAGS_SEND_BUNDLE        (1 << 1)
28 #define HTC_FLAGS_TX_FIXUP_NETBUF    (1 << 2)
29 
30 /* receive direction */
31 #define HTC_FLG_RX_UNUSED        (1 << 0)
32 #define HTC_FLG_RX_TRAILER       (1 << 1)
33 /* Bundle count maske and shift */
34 #define HTC_FLG_RX_BNDL_CNT	 (0xF0)
35 #define HTC_FLG_RX_BNDL_CNT_S	 4
36 
37 #define HTC_HDR_LENGTH  (sizeof(struct htc_frame_hdr))
38 #define HTC_MAX_PAYLOAD_LENGTH   (4096 - sizeof(struct htc_frame_hdr))
39 
40 /* HTC control message IDs */
41 
42 #define HTC_MSG_READY_ID		1
43 #define HTC_MSG_CONN_SVC_ID		2
44 #define HTC_MSG_CONN_SVC_RESP_ID	3
45 #define HTC_MSG_SETUP_COMPLETE_ID	4
46 #define HTC_MSG_SETUP_COMPLETE_EX_ID	5
47 
48 #define HTC_MAX_CTRL_MSG_LEN  256
49 
50 #define HTC_VERSION_2P0  0x00
51 #define HTC_VERSION_2P1  0x01
52 
53 #define HTC_SERVICE_META_DATA_MAX_LENGTH 128
54 
55 #define HTC_CONN_FLGS_THRESH_LVL_QUAT		0x0
56 #define HTC_CONN_FLGS_THRESH_LVL_HALF		0x1
57 #define HTC_CONN_FLGS_THRESH_LVL_THREE_QUAT	0x2
58 #define HTC_CONN_FLGS_REDUCE_CRED_DRIB		0x4
59 #define HTC_CONN_FLGS_THRESH_MASK		0x3
60 /* disable credit flow control on a specific service */
61 #define HTC_CONN_FLGS_DISABLE_CRED_FLOW_CTRL          (1 << 3)
62 #define HTC_CONN_FLGS_SET_RECV_ALLOC_SHIFT    8
63 #define HTC_CONN_FLGS_SET_RECV_ALLOC_MASK     0xFF00U
64 
65 /* connect response status codes */
66 #define HTC_SERVICE_SUCCESS      0
67 #define HTC_SERVICE_NOT_FOUND    1
68 #define HTC_SERVICE_FAILED       2
69 
70 /* no resources (i.e. no more endpoints) */
71 #define HTC_SERVICE_NO_RESOURCES 3
72 
73 /* specific service is not allowing any more endpoints */
74 #define HTC_SERVICE_NO_MORE_EP   4
75 
76 /* report record IDs */
77 #define HTC_RECORD_NULL             0
78 #define HTC_RECORD_CREDITS          1
79 #define HTC_RECORD_LOOKAHEAD        2
80 #define HTC_RECORD_LOOKAHEAD_BUNDLE 3
81 
82 #define HTC_SETUP_COMP_FLG_RX_BNDL_EN     (1 << 0)
83 #define HTC_SETUP_COMP_FLG_DISABLE_TX_CREDIT_FLOW (1 << 1)
84 
85 #define MAKE_SERVICE_ID(group, index) \
86 	(int)(((int)group << 8) | (int)(index))
87 
88 /* NOTE: service ID of 0x0000 is reserved and should never be used */
89 #define HTC_CTRL_RSVD_SVC MAKE_SERVICE_ID(RSVD_SERVICE_GROUP, 1)
90 #define WMI_CONTROL_SVC   MAKE_SERVICE_ID(WMI_SERVICE_GROUP, 0)
91 #define WMI_DATA_BE_SVC   MAKE_SERVICE_ID(WMI_SERVICE_GROUP, 1)
92 #define WMI_DATA_BK_SVC   MAKE_SERVICE_ID(WMI_SERVICE_GROUP, 2)
93 #define WMI_DATA_VI_SVC   MAKE_SERVICE_ID(WMI_SERVICE_GROUP, 3)
94 #define WMI_DATA_VO_SVC   MAKE_SERVICE_ID(WMI_SERVICE_GROUP, 4)
95 #define WMI_MAX_SERVICES  5
96 
97 #define WMM_NUM_AC  4
98 
99 /* reserved and used to flush ALL packets */
100 #define HTC_TX_PACKET_TAG_ALL          0
101 #define HTC_SERVICE_TX_PACKET_TAG      1
102 #define HTC_TX_PACKET_TAG_USER_DEFINED (HTC_SERVICE_TX_PACKET_TAG + 9)
103 
104 /* more packets on this endpoint are being fetched */
105 #define HTC_RX_FLAGS_INDICATE_MORE_PKTS  (1 << 0)
106 
107 /* TODO.. for BMI */
108 #define ENDPOINT1 0
109 /* TODO -remove me, but we have to fix BMI first */
110 #define HTC_MAILBOX_NUM_MAX    4
111 
112 /* enable send bundle padding for this endpoint */
113 #define HTC_FLGS_TX_BNDL_PAD_EN	 (1 << 0)
114 #define HTC_EP_ACTIVE                            ((u32) (1u << 31))
115 
116 /* HTC operational parameters */
117 #define HTC_TARGET_RESPONSE_TIMEOUT        2000	/* in ms */
118 #define HTC_TARGET_RESPONSE_POLL_WAIT      10
119 #define HTC_TARGET_RESPONSE_POLL_COUNT     200
120 #define HTC_TARGET_DEBUG_INTR_MASK         0x01
121 #define HTC_TARGET_CREDIT_INTR_MASK        0xF0
122 
123 #define HTC_HOST_MAX_MSG_PER_BUNDLE        8
124 #define HTC_MIN_HTC_MSGS_TO_BUNDLE         2
125 
126 /* packet flags */
127 
128 #define HTC_RX_PKT_IGNORE_LOOKAHEAD      (1 << 0)
129 #define HTC_RX_PKT_REFRESH_HDR           (1 << 1)
130 #define HTC_RX_PKT_PART_OF_BUNDLE        (1 << 2)
131 #define HTC_RX_PKT_NO_RECYCLE            (1 << 3)
132 
133 #define NUM_CONTROL_BUFFERS     8
134 #define NUM_CONTROL_TX_BUFFERS  2
135 #define NUM_CONTROL_RX_BUFFERS  (NUM_CONTROL_BUFFERS - NUM_CONTROL_TX_BUFFERS)
136 
137 #define HTC_RECV_WAIT_BUFFERS        (1 << 0)
138 #define HTC_OP_STATE_STOPPING        (1 << 0)
139 #define HTC_OP_STATE_SETUP_COMPLETE  (1 << 1)
140 
141 /*
142  * The frame header length and message formats defined herein were selected
143  * to accommodate optimal alignment for target processing. This reduces
144  * code size and improves performance. Any changes to the header length may
145  * alter the alignment and cause exceptions on the target. When adding to
146  * the messagestructures insure that fields are properly aligned.
147  */
148 
149 /* HTC frame header
150  *
151  * NOTE: do not remove or re-arrange the fields, these are minimally
152  * required to take advantage of 4-byte lookaheads in some hardware
153  * implementations.
154  */
155 struct htc_frame_hdr {
156 	u8 eid;
157 	u8 flags;
158 
159 	/* length of data (including trailer) that follows the header */
160 	__le16 payld_len;
161 
162 	/* end of 4-byte lookahead */
163 
164 	u8 ctrl[2];
165 } __packed;
166 
167 /* HTC ready message */
168 struct htc_ready_msg {
169 	__le16 msg_id;
170 	__le16 cred_cnt;
171 	__le16 cred_sz;
172 	u8 max_ep;
173 	u8 pad;
174 } __packed;
175 
176 /* extended HTC ready message */
177 struct htc_ready_ext_msg {
178 	struct htc_ready_msg ver2_0_info;
179 	u8 htc_ver;
180 	u8 msg_per_htc_bndl;
181 } __packed;
182 
183 /* connect service */
184 struct htc_conn_service_msg {
185 	__le16 msg_id;
186 	__le16 svc_id;
187 	__le16 conn_flags;
188 	u8 svc_meta_len;
189 	u8 pad;
190 } __packed;
191 
192 /* connect response */
193 struct htc_conn_service_resp {
194 	__le16 msg_id;
195 	__le16 svc_id;
196 	u8 status;
197 	u8 eid;
198 	__le16 max_msg_sz;
199 	u8 svc_meta_len;
200 	u8 pad;
201 } __packed;
202 
203 struct htc_setup_comp_msg {
204 	__le16 msg_id;
205 } __packed;
206 
207 /* extended setup completion message */
208 struct htc_setup_comp_ext_msg {
209 	__le16 msg_id;
210 	__le32 flags;
211 	u8 msg_per_rxbndl;
212 	u8 Rsvd[3];
213 } __packed;
214 
215 struct htc_record_hdr {
216 	u8 rec_id;
217 	u8 len;
218 } __packed;
219 
220 struct htc_credit_report {
221 	u8 eid;
222 	u8 credits;
223 } __packed;
224 
225 /*
226  * NOTE: The lk_ahd array is guarded by a pre_valid
227  * and Post Valid guard bytes. The pre_valid bytes must
228  * equal the inverse of the post_valid byte.
229  */
230 struct htc_lookahead_report {
231 	u8 pre_valid;
232 	u8 lk_ahd[4];
233 	u8 post_valid;
234 } __packed;
235 
236 struct htc_bundle_lkahd_rpt {
237 	u8 lk_ahd[4];
238 } __packed;
239 
240 /* Current service IDs */
241 
242 enum htc_service_grp_ids {
243 	RSVD_SERVICE_GROUP = 0,
244 	WMI_SERVICE_GROUP = 1,
245 
246 	HTC_TEST_GROUP = 254,
247 	HTC_SERVICE_GROUP_LAST = 255
248 };
249 
250 /* ------ endpoint IDS ------ */
251 
252 enum htc_endpoint_id {
253 	ENDPOINT_UNUSED = -1,
254 	ENDPOINT_0 = 0,
255 	ENDPOINT_1 = 1,
256 	ENDPOINT_2 = 2,
257 	ENDPOINT_3,
258 	ENDPOINT_4,
259 	ENDPOINT_5,
260 	ENDPOINT_6,
261 	ENDPOINT_7,
262 	ENDPOINT_8,
263 	ENDPOINT_MAX,
264 };
265 
266 struct htc_tx_packet_info {
267 	u16 tag;
268 	int cred_used;
269 	u8 flags;
270 	int seqno;
271 };
272 
273 struct htc_rx_packet_info {
274 	u32 exp_hdr;
275 	u32 rx_flags;
276 	u32 indicat_flags;
277 };
278 
279 struct htc_target;
280 
281 /* wrapper around endpoint-specific packets */
282 struct htc_packet {
283 	struct list_head list;
284 
285 	/* caller's per packet specific context */
286 	void *pkt_cntxt;
287 
288 	/*
289 	 * the true buffer start , the caller can store the real
290 	 * buffer start here.  In receive callbacks, the HTC layer
291 	 * sets buf to the start of the payload past the header.
292 	 * This field allows the caller to reset buf when it recycles
293 	 * receive packets back to HTC.
294 	 */
295 	u8 *buf_start;
296 
297 	/*
298 	 * Pointer to the start of the buffer. In the transmit
299 	 * direction this points to the start of the payload. In the
300 	 * receive direction, however, the buffer when queued up
301 	 * points to the start of the HTC header but when returned
302 	 * to the caller points to the start of the payload
303 	 */
304 	u8 *buf;
305 	u32 buf_len;
306 
307 	/* actual length of payload */
308 	u32 act_len;
309 
310 	/* endpoint that this packet was sent/recv'd from */
311 	enum htc_endpoint_id endpoint;
312 
313 	/* completion status */
314 
315 	int status;
316 	union {
317 		struct htc_tx_packet_info tx;
318 		struct htc_rx_packet_info rx;
319 	} info;
320 
321 	void (*completion) (struct htc_target *, struct htc_packet *);
322 	struct htc_target *context;
323 
324 	/*
325 	 * optimization for network-oriented data, the HTC packet
326 	 * can pass the network buffer corresponding to the HTC packet
327 	 * lower layers may optimized the transfer knowing this is
328 	 * a network buffer
329 	 */
330 	struct sk_buff *skb;
331 };
332 
333 enum htc_send_full_action {
334 	HTC_SEND_FULL_KEEP = 0,
335 	HTC_SEND_FULL_DROP = 1,
336 };
337 
338 struct htc_ep_callbacks {
339 	void (*tx_complete) (struct htc_target *, struct htc_packet *);
340 	void (*rx) (struct htc_target *, struct htc_packet *);
341 	void (*rx_refill) (struct htc_target *, enum htc_endpoint_id endpoint);
342 	enum htc_send_full_action (*tx_full) (struct htc_target *,
343 					      struct htc_packet *);
344 	struct htc_packet *(*rx_allocthresh) (struct htc_target *,
345 					      enum htc_endpoint_id, int);
346 	void (*tx_comp_multi) (struct htc_target *, struct list_head *);
347 	int rx_alloc_thresh;
348 	int rx_refill_thresh;
349 };
350 
351 /* service connection information */
352 struct htc_service_connect_req {
353 	u16 svc_id;
354 	u16 conn_flags;
355 	struct htc_ep_callbacks ep_cb;
356 	int max_txq_depth;
357 	u32 flags;
358 	unsigned int max_rxmsg_sz;
359 };
360 
361 /* service connection response information */
362 struct htc_service_connect_resp {
363 	u8 buf_len;
364 	u8 act_len;
365 	enum htc_endpoint_id endpoint;
366 	unsigned int len_max;
367 	u8 resp_code;
368 };
369 
370 /* endpoint distributionstructure */
371 struct htc_endpoint_credit_dist {
372 	struct list_head list;
373 
374 	/* Service ID (set by HTC) */
375 	u16 svc_id;
376 
377 	/* endpoint for this distributionstruct (set by HTC) */
378 	enum htc_endpoint_id endpoint;
379 
380 	u32 dist_flags;
381 
382 	/*
383 	 * credits for normal operation, anything above this
384 	 * indicates the endpoint is over-subscribed.
385 	 */
386 	int cred_norm;
387 
388 	/* floor for credit distribution */
389 	int cred_min;
390 
391 	int cred_assngd;
392 
393 	/* current credits available */
394 	int credits;
395 
396 	/*
397 	 * pending credits to distribute on this endpoint, this
398 	 * is set by HTC when credit reports arrive.  The credit
399 	 * distribution functions sets this to zero when it distributes
400 	 * the credits.
401 	 */
402 	int cred_to_dist;
403 
404 	/*
405 	 * the number of credits that the current pending TX packet needs
406 	 * to transmit. This is set by HTC when endpoint needs credits in
407 	 * order to transmit.
408 	 */
409 	int seek_cred;
410 
411 	/* size in bytes of each credit */
412 	int cred_sz;
413 
414 	/* credits required for a maximum sized messages */
415 	int cred_per_msg;
416 
417 	/* reserved for HTC use */
418 	struct htc_endpoint *htc_ep;
419 
420 	/*
421 	 * current depth of TX queue , i.e. messages waiting for credits
422 	 * This field is valid only when HTC_CREDIT_DIST_ACTIVITY_CHANGE
423 	 * or HTC_CREDIT_DIST_SEND_COMPLETE is indicated on an endpoint
424 	 * that has non-zero credits to recover.
425 	 */
426 	int txq_depth;
427 };
428 
429 /*
430  * credit distribution code that is passed into the distribution function,
431  * there are mandatory and optional codes that must be handled
432  */
433 enum htc_credit_dist_reason {
434 	HTC_CREDIT_DIST_SEND_COMPLETE = 0,
435 	HTC_CREDIT_DIST_ACTIVITY_CHANGE = 1,
436 	HTC_CREDIT_DIST_SEEK_CREDITS,
437 };
438 
439 struct ath6kl_htc_credit_info {
440 	int total_avail_credits;
441 	int cur_free_credits;
442 
443 	/* list of lowest priority endpoints */
444 	struct list_head lowestpri_ep_dist;
445 };
446 
447 /* endpoint statistics */
448 struct htc_endpoint_stats {
449 	/*
450 	 * number of times the host set the credit-low flag in a send
451 	 * message on this endpoint
452 	 */
453 	u32 cred_low_indicate;
454 
455 	u32 tx_issued;
456 	u32 tx_pkt_bundled;
457 	u32 tx_bundles;
458 	u32 tx_dropped;
459 
460 	/* running count of total credit reports received for this endpoint */
461 	u32 tx_cred_rpt;
462 
463 	/* credit reports received from this endpoint's RX packets */
464 	u32 cred_rpt_from_rx;
465 
466 	/* credit reports received from RX packets of other endpoints */
467 	u32 cred_rpt_from_other;
468 
469 	/* credit reports received from endpoint 0 RX packets */
470 	u32 cred_rpt_ep0;
471 
472 	/* count of credits received via Rx packets on this endpoint */
473 	u32 cred_from_rx;
474 
475 	/* count of credits received via another endpoint */
476 	u32 cred_from_other;
477 
478 	/* count of credits received via another endpoint */
479 	u32 cred_from_ep0;
480 
481 	/* count of consummed credits */
482 	u32 cred_cosumd;
483 
484 	/* count of credits returned */
485 	u32 cred_retnd;
486 
487 	u32 rx_pkts;
488 
489 	/* count of lookahead records found in Rx msg */
490 	u32 rx_lkahds;
491 
492 	/* count of recv packets received in a bundle */
493 	u32 rx_bundl;
494 
495 	/* count of number of bundled lookaheads */
496 	u32 rx_bundle_lkahd;
497 
498 	/* count of the number of bundle indications from the HTC header */
499 	u32 rx_bundle_from_hdr;
500 
501 	/* the number of times the recv allocation threshold was hit */
502 	u32 rx_alloc_thresh_hit;
503 
504 	/* total number of bytes */
505 	u32 rxalloc_thresh_byte;
506 };
507 
508 struct htc_endpoint {
509 	enum htc_endpoint_id eid;
510 	u16 svc_id;
511 	struct list_head txq;
512 	struct list_head rx_bufq;
513 	struct htc_endpoint_credit_dist cred_dist;
514 	struct htc_ep_callbacks ep_cb;
515 	int max_txq_depth;
516 	int len_max;
517 	int tx_proc_cnt;
518 	int rx_proc_cnt;
519 	struct htc_target *target;
520 	u8 seqno;
521 	u32 conn_flags;
522 	struct htc_endpoint_stats ep_st;
523 	u16 tx_drop_packet_threshold;
524 
525 	struct {
526 		u8 pipeid_ul;
527 		u8 pipeid_dl;
528 		struct list_head tx_lookup_queue;
529 		bool tx_credit_flow_enabled;
530 	} pipe;
531 };
532 
533 struct htc_control_buffer {
534 	struct htc_packet packet;
535 	u8 *buf;
536 };
537 
538 struct htc_pipe_txcredit_alloc {
539 	u16 service_id;
540 	u8 credit_alloc;
541 };
542 
543 enum htc_send_queue_result {
544 	HTC_SEND_QUEUE_OK = 0,	/* packet was queued */
545 	HTC_SEND_QUEUE_DROP = 1,	/* this packet should be dropped */
546 };
547 
548 struct ath6kl_htc_ops {
549 	void* (*create)(struct ath6kl *ar);
550 	int (*wait_target)(struct htc_target *target);
551 	int (*start)(struct htc_target *target);
552 	int (*conn_service)(struct htc_target *target,
553 			    struct htc_service_connect_req *req,
554 			    struct htc_service_connect_resp *resp);
555 	int  (*tx)(struct htc_target *target, struct htc_packet *packet);
556 	void (*stop)(struct htc_target *target);
557 	void (*cleanup)(struct htc_target *target);
558 	void (*flush_txep)(struct htc_target *target,
559 			   enum htc_endpoint_id endpoint, u16 tag);
560 	void (*flush_rx_buf)(struct htc_target *target);
561 	void (*activity_changed)(struct htc_target *target,
562 				 enum htc_endpoint_id endpoint,
563 				 bool active);
564 	int (*get_rxbuf_num)(struct htc_target *target,
565 			     enum htc_endpoint_id endpoint);
566 	int (*add_rxbuf_multiple)(struct htc_target *target,
567 				  struct list_head *pktq);
568 	int (*credit_setup)(struct htc_target *target,
569 			    struct ath6kl_htc_credit_info *cred_info);
570 	int (*tx_complete)(struct ath6kl *ar, struct sk_buff *skb);
571 	int (*rx_complete)(struct ath6kl *ar, struct sk_buff *skb, u8 pipe);
572 };
573 
574 struct ath6kl_device;
575 
576 /* our HTC target state */
577 struct htc_target {
578 	struct htc_endpoint endpoint[ENDPOINT_MAX];
579 
580 	/* contains struct htc_endpoint_credit_dist */
581 	struct list_head cred_dist_list;
582 
583 	struct list_head free_ctrl_txbuf;
584 	struct list_head free_ctrl_rxbuf;
585 	struct ath6kl_htc_credit_info *credit_info;
586 	int tgt_creds;
587 	unsigned int tgt_cred_sz;
588 
589 	/* protects free_ctrl_txbuf and free_ctrl_rxbuf */
590 	spinlock_t htc_lock;
591 
592 	/* FIXME: does this protext rx_bufq and endpoint structures or what? */
593 	spinlock_t rx_lock;
594 
595 	/* protects endpoint->txq */
596 	spinlock_t tx_lock;
597 
598 	struct ath6kl_device *dev;
599 	u32 htc_flags;
600 	u32 rx_st_flags;
601 	enum htc_endpoint_id ep_waiting;
602 	u8 htc_tgt_ver;
603 
604 	/* max messages per bundle for HTC */
605 	int msg_per_bndl_max;
606 
607 	u32 tx_bndl_mask;
608 	int rx_bndl_enable;
609 	int max_rx_bndl_sz;
610 	int max_tx_bndl_sz;
611 
612 	u32 block_sz;
613 	u32 block_mask;
614 
615 	int max_scat_entries;
616 	int max_xfer_szper_scatreq;
617 
618 	int chk_irq_status_cnt;
619 
620 	/* counts the number of Tx without bundling continously per AC */
621 	u32 ac_tx_count[WMM_NUM_AC];
622 
623 	struct {
624 		struct htc_packet *htc_packet_pool;
625 		u8 ctrl_response_buf[HTC_MAX_CTRL_MSG_LEN];
626 		int ctrl_response_len;
627 		bool ctrl_response_valid;
628 		struct htc_pipe_txcredit_alloc txcredit_alloc[ENDPOINT_MAX];
629 	} pipe;
630 };
631 
632 int ath6kl_htc_rxmsg_pending_handler(struct htc_target *target,
633 				     u32 msg_look_ahead, int *n_pkts);
634 
set_htc_pkt_info(struct htc_packet * packet,void * context,u8 * buf,unsigned int len,enum htc_endpoint_id eid,u16 tag)635 static inline void set_htc_pkt_info(struct htc_packet *packet, void *context,
636 				    u8 *buf, unsigned int len,
637 				    enum htc_endpoint_id eid, u16 tag)
638 {
639 	packet->pkt_cntxt = context;
640 	packet->buf = buf;
641 	packet->act_len = len;
642 	packet->endpoint = eid;
643 	packet->info.tx.tag = tag;
644 }
645 
htc_rxpkt_reset(struct htc_packet * packet)646 static inline void htc_rxpkt_reset(struct htc_packet *packet)
647 {
648 	packet->buf = packet->buf_start;
649 	packet->act_len = 0;
650 }
651 
set_htc_rxpkt_info(struct htc_packet * packet,void * context,u8 * buf,unsigned long len,enum htc_endpoint_id eid)652 static inline void set_htc_rxpkt_info(struct htc_packet *packet, void *context,
653 				      u8 *buf, unsigned long len,
654 				      enum htc_endpoint_id eid)
655 {
656 	packet->pkt_cntxt = context;
657 	packet->buf = buf;
658 	packet->buf_start = buf;
659 	packet->buf_len = len;
660 	packet->endpoint = eid;
661 }
662 
get_queue_depth(struct list_head * queue)663 static inline int get_queue_depth(struct list_head *queue)
664 {
665 	struct list_head *tmp_list;
666 	int depth = 0;
667 
668 	list_for_each(tmp_list, queue)
669 	    depth++;
670 
671 	return depth;
672 }
673 
674 void ath6kl_htc_pipe_attach(struct ath6kl *ar);
675 void ath6kl_htc_mbox_attach(struct ath6kl *ar);
676 
677 #endif
678