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 	struct_group_tagged(htc_frame_look_ahead, header,
157 		union {
158 			struct {
159 				u8 eid;
160 				u8 flags;
161 
162 				/* length of data (including trailer) that follows the header */
163 				__le16 payld_len;
164 
165 			};
166 			u32 word;
167 		};
168 	);
169 	/* end of 4-byte lookahead */
170 
171 	u8 ctrl[2];
172 } __packed;
173 
174 /* HTC ready message */
175 struct htc_ready_msg {
176 	__le16 msg_id;
177 	__le16 cred_cnt;
178 	__le16 cred_sz;
179 	u8 max_ep;
180 	u8 pad;
181 } __packed;
182 
183 /* extended HTC ready message */
184 struct htc_ready_ext_msg {
185 	struct htc_ready_msg ver2_0_info;
186 	u8 htc_ver;
187 	u8 msg_per_htc_bndl;
188 } __packed;
189 
190 /* connect service */
191 struct htc_conn_service_msg {
192 	__le16 msg_id;
193 	__le16 svc_id;
194 	__le16 conn_flags;
195 	u8 svc_meta_len;
196 	u8 pad;
197 } __packed;
198 
199 /* connect response */
200 struct htc_conn_service_resp {
201 	__le16 msg_id;
202 	__le16 svc_id;
203 	u8 status;
204 	u8 eid;
205 	__le16 max_msg_sz;
206 	u8 svc_meta_len;
207 	u8 pad;
208 } __packed;
209 
210 struct htc_setup_comp_msg {
211 	__le16 msg_id;
212 } __packed;
213 
214 /* extended setup completion message */
215 struct htc_setup_comp_ext_msg {
216 	__le16 msg_id;
217 	__le32 flags;
218 	u8 msg_per_rxbndl;
219 	u8 Rsvd[3];
220 } __packed;
221 
222 struct htc_record_hdr {
223 	u8 rec_id;
224 	u8 len;
225 } __packed;
226 
227 struct htc_credit_report {
228 	u8 eid;
229 	u8 credits;
230 } __packed;
231 
232 /*
233  * NOTE: The lk_ahd array is guarded by a pre_valid
234  * and Post Valid guard bytes. The pre_valid bytes must
235  * equal the inverse of the post_valid byte.
236  */
237 struct htc_lookahead_report {
238 	u8 pre_valid;
239 	u8 lk_ahd[4];
240 	u8 post_valid;
241 } __packed;
242 
243 struct htc_bundle_lkahd_rpt {
244 	u8 lk_ahd[4];
245 } __packed;
246 
247 /* Current service IDs */
248 
249 enum htc_service_grp_ids {
250 	RSVD_SERVICE_GROUP = 0,
251 	WMI_SERVICE_GROUP = 1,
252 
253 	HTC_TEST_GROUP = 254,
254 	HTC_SERVICE_GROUP_LAST = 255
255 };
256 
257 /* ------ endpoint IDS ------ */
258 
259 enum htc_endpoint_id {
260 	ENDPOINT_UNUSED = -1,
261 	ENDPOINT_0 = 0,
262 	ENDPOINT_1 = 1,
263 	ENDPOINT_2 = 2,
264 	ENDPOINT_3,
265 	ENDPOINT_4,
266 	ENDPOINT_5,
267 	ENDPOINT_6,
268 	ENDPOINT_7,
269 	ENDPOINT_8,
270 	ENDPOINT_MAX,
271 };
272 
273 struct htc_tx_packet_info {
274 	u16 tag;
275 	int cred_used;
276 	u8 flags;
277 	int seqno;
278 };
279 
280 struct htc_rx_packet_info {
281 	u32 exp_hdr;
282 	u32 rx_flags;
283 	u32 indicat_flags;
284 };
285 
286 struct htc_target;
287 
288 /* wrapper around endpoint-specific packets */
289 struct htc_packet {
290 	struct list_head list;
291 
292 	/* caller's per packet specific context */
293 	void *pkt_cntxt;
294 
295 	/*
296 	 * the true buffer start , the caller can store the real
297 	 * buffer start here.  In receive callbacks, the HTC layer
298 	 * sets buf to the start of the payload past the header.
299 	 * This field allows the caller to reset buf when it recycles
300 	 * receive packets back to HTC.
301 	 */
302 	u8 *buf_start;
303 
304 	/*
305 	 * Pointer to the start of the buffer. In the transmit
306 	 * direction this points to the start of the payload. In the
307 	 * receive direction, however, the buffer when queued up
308 	 * points to the start of the HTC header but when returned
309 	 * to the caller points to the start of the payload
310 	 */
311 	u8 *buf;
312 	u32 buf_len;
313 
314 	/* actual length of payload */
315 	u32 act_len;
316 
317 	/* endpoint that this packet was sent/recv'd from */
318 	enum htc_endpoint_id endpoint;
319 
320 	/* completion status */
321 
322 	int status;
323 	union {
324 		struct htc_tx_packet_info tx;
325 		struct htc_rx_packet_info rx;
326 	} info;
327 
328 	void (*completion) (struct htc_target *, struct htc_packet *);
329 	struct htc_target *context;
330 
331 	/*
332 	 * optimization for network-oriented data, the HTC packet
333 	 * can pass the network buffer corresponding to the HTC packet
334 	 * lower layers may optimized the transfer knowing this is
335 	 * a network buffer
336 	 */
337 	struct sk_buff *skb;
338 };
339 
340 enum htc_send_full_action {
341 	HTC_SEND_FULL_KEEP = 0,
342 	HTC_SEND_FULL_DROP = 1,
343 };
344 
345 struct htc_ep_callbacks {
346 	void (*tx_complete) (struct htc_target *, struct htc_packet *);
347 	void (*rx) (struct htc_target *, struct htc_packet *);
348 	void (*rx_refill) (struct htc_target *, enum htc_endpoint_id endpoint);
349 	enum htc_send_full_action (*tx_full) (struct htc_target *,
350 					      struct htc_packet *);
351 	struct htc_packet *(*rx_allocthresh) (struct htc_target *,
352 					      enum htc_endpoint_id, int);
353 	void (*tx_comp_multi) (struct htc_target *, struct list_head *);
354 	int rx_alloc_thresh;
355 	int rx_refill_thresh;
356 };
357 
358 /* service connection information */
359 struct htc_service_connect_req {
360 	u16 svc_id;
361 	u16 conn_flags;
362 	struct htc_ep_callbacks ep_cb;
363 	int max_txq_depth;
364 	u32 flags;
365 	unsigned int max_rxmsg_sz;
366 };
367 
368 /* service connection response information */
369 struct htc_service_connect_resp {
370 	u8 buf_len;
371 	u8 act_len;
372 	enum htc_endpoint_id endpoint;
373 	unsigned int len_max;
374 	u8 resp_code;
375 };
376 
377 /* endpoint distributionstructure */
378 struct htc_endpoint_credit_dist {
379 	struct list_head list;
380 
381 	/* Service ID (set by HTC) */
382 	u16 svc_id;
383 
384 	/* endpoint for this distributionstruct (set by HTC) */
385 	enum htc_endpoint_id endpoint;
386 
387 	u32 dist_flags;
388 
389 	/*
390 	 * credits for normal operation, anything above this
391 	 * indicates the endpoint is over-subscribed.
392 	 */
393 	int cred_norm;
394 
395 	/* floor for credit distribution */
396 	int cred_min;
397 
398 	int cred_assngd;
399 
400 	/* current credits available */
401 	int credits;
402 
403 	/*
404 	 * pending credits to distribute on this endpoint, this
405 	 * is set by HTC when credit reports arrive.  The credit
406 	 * distribution functions sets this to zero when it distributes
407 	 * the credits.
408 	 */
409 	int cred_to_dist;
410 
411 	/*
412 	 * the number of credits that the current pending TX packet needs
413 	 * to transmit. This is set by HTC when endpoint needs credits in
414 	 * order to transmit.
415 	 */
416 	int seek_cred;
417 
418 	/* size in bytes of each credit */
419 	int cred_sz;
420 
421 	/* credits required for a maximum sized messages */
422 	int cred_per_msg;
423 
424 	/* reserved for HTC use */
425 	struct htc_endpoint *htc_ep;
426 
427 	/*
428 	 * current depth of TX queue , i.e. messages waiting for credits
429 	 * This field is valid only when HTC_CREDIT_DIST_ACTIVITY_CHANGE
430 	 * or HTC_CREDIT_DIST_SEND_COMPLETE is indicated on an endpoint
431 	 * that has non-zero credits to recover.
432 	 */
433 	int txq_depth;
434 };
435 
436 /*
437  * credit distribution code that is passed into the distribution function,
438  * there are mandatory and optional codes that must be handled
439  */
440 enum htc_credit_dist_reason {
441 	HTC_CREDIT_DIST_SEND_COMPLETE = 0,
442 	HTC_CREDIT_DIST_ACTIVITY_CHANGE = 1,
443 	HTC_CREDIT_DIST_SEEK_CREDITS,
444 };
445 
446 struct ath6kl_htc_credit_info {
447 	int total_avail_credits;
448 	int cur_free_credits;
449 
450 	/* list of lowest priority endpoints */
451 	struct list_head lowestpri_ep_dist;
452 };
453 
454 /* endpoint statistics */
455 struct htc_endpoint_stats {
456 	/*
457 	 * number of times the host set the credit-low flag in a send
458 	 * message on this endpoint
459 	 */
460 	u32 cred_low_indicate;
461 
462 	u32 tx_issued;
463 	u32 tx_pkt_bundled;
464 	u32 tx_bundles;
465 	u32 tx_dropped;
466 
467 	/* running count of total credit reports received for this endpoint */
468 	u32 tx_cred_rpt;
469 
470 	/* credit reports received from this endpoint's RX packets */
471 	u32 cred_rpt_from_rx;
472 
473 	/* credit reports received from RX packets of other endpoints */
474 	u32 cred_rpt_from_other;
475 
476 	/* credit reports received from endpoint 0 RX packets */
477 	u32 cred_rpt_ep0;
478 
479 	/* count of credits received via Rx packets on this endpoint */
480 	u32 cred_from_rx;
481 
482 	/* count of credits received via another endpoint */
483 	u32 cred_from_other;
484 
485 	/* count of credits received via another endpoint */
486 	u32 cred_from_ep0;
487 
488 	/* count of consummed credits */
489 	u32 cred_cosumd;
490 
491 	/* count of credits returned */
492 	u32 cred_retnd;
493 
494 	u32 rx_pkts;
495 
496 	/* count of lookahead records found in Rx msg */
497 	u32 rx_lkahds;
498 
499 	/* count of recv packets received in a bundle */
500 	u32 rx_bundl;
501 
502 	/* count of number of bundled lookaheads */
503 	u32 rx_bundle_lkahd;
504 
505 	/* count of the number of bundle indications from the HTC header */
506 	u32 rx_bundle_from_hdr;
507 
508 	/* the number of times the recv allocation threshold was hit */
509 	u32 rx_alloc_thresh_hit;
510 
511 	/* total number of bytes */
512 	u32 rxalloc_thresh_byte;
513 };
514 
515 struct htc_endpoint {
516 	enum htc_endpoint_id eid;
517 	u16 svc_id;
518 	struct list_head txq;
519 	struct list_head rx_bufq;
520 	struct htc_endpoint_credit_dist cred_dist;
521 	struct htc_ep_callbacks ep_cb;
522 	int max_txq_depth;
523 	int len_max;
524 	int tx_proc_cnt;
525 	int rx_proc_cnt;
526 	struct htc_target *target;
527 	u8 seqno;
528 	u32 conn_flags;
529 	struct htc_endpoint_stats ep_st;
530 	u16 tx_drop_packet_threshold;
531 
532 	struct {
533 		u8 pipeid_ul;
534 		u8 pipeid_dl;
535 		struct list_head tx_lookup_queue;
536 		bool tx_credit_flow_enabled;
537 	} pipe;
538 };
539 
540 struct htc_control_buffer {
541 	struct htc_packet packet;
542 	u8 *buf;
543 };
544 
545 struct htc_pipe_txcredit_alloc {
546 	u16 service_id;
547 	u8 credit_alloc;
548 };
549 
550 enum htc_send_queue_result {
551 	HTC_SEND_QUEUE_OK = 0,	/* packet was queued */
552 	HTC_SEND_QUEUE_DROP = 1,	/* this packet should be dropped */
553 };
554 
555 struct ath6kl_htc_ops {
556 	void* (*create)(struct ath6kl *ar);
557 	int (*wait_target)(struct htc_target *target);
558 	int (*start)(struct htc_target *target);
559 	int (*conn_service)(struct htc_target *target,
560 			    struct htc_service_connect_req *req,
561 			    struct htc_service_connect_resp *resp);
562 	int  (*tx)(struct htc_target *target, struct htc_packet *packet);
563 	void (*stop)(struct htc_target *target);
564 	void (*cleanup)(struct htc_target *target);
565 	void (*flush_txep)(struct htc_target *target,
566 			   enum htc_endpoint_id endpoint, u16 tag);
567 	void (*flush_rx_buf)(struct htc_target *target);
568 	void (*activity_changed)(struct htc_target *target,
569 				 enum htc_endpoint_id endpoint,
570 				 bool active);
571 	int (*get_rxbuf_num)(struct htc_target *target,
572 			     enum htc_endpoint_id endpoint);
573 	int (*add_rxbuf_multiple)(struct htc_target *target,
574 				  struct list_head *pktq);
575 	int (*credit_setup)(struct htc_target *target,
576 			    struct ath6kl_htc_credit_info *cred_info);
577 	int (*tx_complete)(struct ath6kl *ar, struct sk_buff *skb);
578 	int (*rx_complete)(struct ath6kl *ar, struct sk_buff *skb, u8 pipe);
579 };
580 
581 struct ath6kl_device;
582 
583 /* our HTC target state */
584 struct htc_target {
585 	struct htc_endpoint endpoint[ENDPOINT_MAX];
586 
587 	/* contains struct htc_endpoint_credit_dist */
588 	struct list_head cred_dist_list;
589 
590 	struct list_head free_ctrl_txbuf;
591 	struct list_head free_ctrl_rxbuf;
592 	struct ath6kl_htc_credit_info *credit_info;
593 	int tgt_creds;
594 	unsigned int tgt_cred_sz;
595 
596 	/* protects free_ctrl_txbuf and free_ctrl_rxbuf */
597 	spinlock_t htc_lock;
598 
599 	/* FIXME: does this protext rx_bufq and endpoint structures or what? */
600 	spinlock_t rx_lock;
601 
602 	/* protects endpoint->txq */
603 	spinlock_t tx_lock;
604 
605 	struct ath6kl_device *dev;
606 	u32 htc_flags;
607 	u32 rx_st_flags;
608 	enum htc_endpoint_id ep_waiting;
609 	u8 htc_tgt_ver;
610 
611 	/* max messages per bundle for HTC */
612 	int msg_per_bndl_max;
613 
614 	u32 tx_bndl_mask;
615 	int rx_bndl_enable;
616 	int max_rx_bndl_sz;
617 	int max_tx_bndl_sz;
618 
619 	u32 block_sz;
620 	u32 block_mask;
621 
622 	int max_scat_entries;
623 	int max_xfer_szper_scatreq;
624 
625 	int chk_irq_status_cnt;
626 
627 	/* counts the number of Tx without bundling continously per AC */
628 	u32 ac_tx_count[WMM_NUM_AC];
629 
630 	struct {
631 		struct htc_packet *htc_packet_pool;
632 		u8 ctrl_response_buf[HTC_MAX_CTRL_MSG_LEN];
633 		int ctrl_response_len;
634 		bool ctrl_response_valid;
635 		struct htc_pipe_txcredit_alloc txcredit_alloc[ENDPOINT_MAX];
636 	} pipe;
637 };
638 
639 int ath6kl_htc_rxmsg_pending_handler(struct htc_target *target,
640 				     u32 msg_look_ahead, int *n_pkts);
641 
set_htc_pkt_info(struct htc_packet * packet,void * context,u8 * buf,unsigned int len,enum htc_endpoint_id eid,u16 tag)642 static inline void set_htc_pkt_info(struct htc_packet *packet, void *context,
643 				    u8 *buf, unsigned int len,
644 				    enum htc_endpoint_id eid, u16 tag)
645 {
646 	packet->pkt_cntxt = context;
647 	packet->buf = buf;
648 	packet->act_len = len;
649 	packet->endpoint = eid;
650 	packet->info.tx.tag = tag;
651 }
652 
htc_rxpkt_reset(struct htc_packet * packet)653 static inline void htc_rxpkt_reset(struct htc_packet *packet)
654 {
655 	packet->buf = packet->buf_start;
656 	packet->act_len = 0;
657 }
658 
set_htc_rxpkt_info(struct htc_packet * packet,void * context,u8 * buf,unsigned long len,enum htc_endpoint_id eid)659 static inline void set_htc_rxpkt_info(struct htc_packet *packet, void *context,
660 				      u8 *buf, unsigned long len,
661 				      enum htc_endpoint_id eid)
662 {
663 	packet->pkt_cntxt = context;
664 	packet->buf = buf;
665 	packet->buf_start = buf;
666 	packet->buf_len = len;
667 	packet->endpoint = eid;
668 }
669 
get_queue_depth(struct list_head * queue)670 static inline int get_queue_depth(struct list_head *queue)
671 {
672 	struct list_head *tmp_list;
673 	int depth = 0;
674 
675 	list_for_each(tmp_list, queue)
676 	    depth++;
677 
678 	return depth;
679 }
680 
681 void ath6kl_htc_pipe_attach(struct ath6kl *ar);
682 void ath6kl_htc_mbox_attach(struct ath6kl *ar);
683 
684 #endif
685