xref: /dragonfly/sys/dev/raid/aac/aacvar.h (revision 1de703da)
1 /*-
2  * Copyright (c) 2000 Michael Smith
3  * Copyright (c) 2001 Scott Long
4  * Copyright (c) 2000 BSDi
5  * Copyright (c) 2001 Adaptec, Inc.
6  * All rights reserved.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
11  * 1. Redistributions of source code must retain the above copyright
12  *    notice, this list of conditions and the following disclaimer.
13  * 2. Redistributions in binary form must reproduce the above copyright
14  *    notice, this list of conditions and the following disclaimer in the
15  *    documentation and/or other materials provided with the distribution.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27  * SUCH DAMAGE.
28  *
29  *	$FreeBSD: src/sys/dev/aac/aacvar.h,v 1.4.2.7 2003/04/08 13:22:08 scottl Exp $
30  *	$DragonFly: src/sys/dev/raid/aac/aacvar.h,v 1.2 2003/06/17 04:28:21 dillon Exp $
31  */
32 
33 /*
34  * Driver Parameter Definitions
35  */
36 
37 /*
38  * The firmware interface allows for a 16-bit s/g list length.  We limit
39  * ourselves to a reasonable maximum and ensure alignment.
40  */
41 #define AAC_MAXSGENTRIES	64	/* max S/G entries, limit 65535 */
42 
43 /*
44  * We allocate a small set of FIBs for the adapter to use to send us messages.
45  */
46 #define AAC_ADAPTER_FIBS	8
47 
48 /*
49  * FIBs are allocated up-front, and the pool isn't grown.  We should allocate
50  * enough here to let us keep the adapter busy without wasting large amounts
51  * of kernel memory.  The current interface implementation limits us to 512
52  * FIBs queued for the adapter at any one time.
53  */
54 #define AAC_FIB_COUNT		128
55 
56 /*
57  * The controller reports status events in AIFs.  We hang on to a number of
58  * these in order to pass them out to user-space management tools.
59  */
60 #define AAC_AIFQ_LENGTH		64
61 
62 /*
63  * Firmware messages are passed in the printf buffer.
64  */
65 #define AAC_PRINTF_BUFSIZE	256
66 
67 /*
68  * We wait this many seconds for the adapter to come ready if it is still
69  * booting
70  */
71 #define AAC_BOOT_TIMEOUT	(3 * 60)
72 
73 /*
74  * Timeout for immediate commands.
75  */
76 #define AAC_IMMEDIATE_TIMEOUT	30		/* seconds */
77 
78 /*
79  * Timeout for normal commands
80  */
81 #define AAC_CMD_TIMEOUT		30		/* seconds */
82 
83 /*
84  * Rate at which we periodically check for timed out commands and kick the
85  * controller.
86  */
87 #define AAC_PERIODIC_INTERVAL	20		/* seconds */
88 
89 /*
90  * Character device major numbers.
91  */
92 #define AAC_DISK_MAJOR	200
93 
94 /*
95  * Driver Variable Definitions
96  */
97 
98 #if __FreeBSD_version >= 500005
99 # include <sys/taskqueue.h>
100 #endif
101 
102 /*
103  * Per-container data structure
104  */
105 struct aac_container
106 {
107 	struct aac_mntobj		co_mntobj;
108 	device_t			co_disk;
109 	int				co_found;
110 	TAILQ_ENTRY(aac_container)	co_link;
111 };
112 
113 /*
114  * Per-disk structure
115  */
116 struct aac_disk
117 {
118 	device_t			ad_dev;
119 	dev_t				ad_dev_t;
120 	struct aac_softc		*ad_controller;
121 	struct aac_container		*ad_container;
122 	struct disk			ad_disk;
123 	struct devstat			ad_stats;
124 	struct disklabel		ad_label;
125 	int				ad_flags;
126 #define AAC_DISK_OPEN	(1<<0)
127 	int				ad_cylinders;
128 	int				ad_heads;
129 	int				ad_sectors;
130 	u_int32_t			ad_size;
131 	int				unit;
132 };
133 
134 /*
135  * Per-command control structure.
136  */
137 struct aac_command
138 {
139 	TAILQ_ENTRY(aac_command) cm_link;	/* list linkage */
140 
141 	struct aac_softc	*cm_sc;		/* controller that owns us */
142 
143 	struct aac_fib		*cm_fib;	/* FIB associated with this
144 						 * command */
145 	u_int32_t		cm_fibphys;	/* bus address of the FIB */
146 	struct bio		*cm_data;	/* pointer to data in kernel
147 						 * space */
148 	u_int32_t		cm_datalen;	/* data length */
149 	bus_dmamap_t		cm_datamap;	/* DMA map for bio data */
150 	struct aac_sg_table	*cm_sgtable;	/* pointer to s/g table in
151 						 * command */
152 	int			cm_flags;
153 #define AAC_CMD_MAPPED		(1<<0)		/* command has had its data
154 						 * mapped */
155 #define AAC_CMD_DATAIN		(1<<1)		/* command involves data moving
156 						 * from controller to host */
157 #define AAC_CMD_DATAOUT		(1<<2)		/* command involves data moving
158 						 * from host to controller */
159 #define AAC_CMD_COMPLETED	(1<<3)		/* command has been completed */
160 #define AAC_CMD_TIMEDOUT	(1<<4)		/* command taken too long */
161 #define AAC_ON_AACQ_FREE	(1<<5)
162 #define AAC_ON_AACQ_READY	(1<<6)
163 #define AAC_ON_AACQ_BUSY	(1<<7)
164 #define AAC_ON_AACQ_COMPLETE	(1<<8)
165 #define AAC_ON_AACQ_MASK	((1<<5)|(1<<6)|(1<<7)|(1<<8))
166 
167 	void			(* cm_complete)(struct aac_command *cm);
168 	void			*cm_private;
169 	time_t			cm_timestamp;	/* command creation time */
170 	int			cm_queue;
171 };
172 
173 /*
174  * We gather a number of adapter-visible items into a single structure.
175  *
176  * The ordering of this strucure may be important; we copy the Linux driver:
177  *
178  * Adapter FIBs
179  * Init struct
180  * Queue headers (Comm Area)
181  * Printf buffer
182  *
183  * In addition, we add:
184  * Sync Fib
185  */
186 struct aac_common {
187 	/* fibs for the controller to send us messages */
188 	struct aac_fib		ac_fibs[AAC_ADAPTER_FIBS];
189 
190 	/* the init structure */
191 	struct aac_adapter_init	ac_init;
192 
193 	/* arena within which the queue structures are kept */
194 	u_int8_t		ac_qbuf[sizeof(struct aac_queue_table) +
195 				AAC_QUEUE_ALIGN];
196 
197 	/* buffer for text messages from the controller */
198 	char		       	ac_printf[AAC_PRINTF_BUFSIZE];
199 
200 	/* fib for synchronous commands */
201 	struct aac_fib		ac_sync_fib;
202 };
203 
204 /*
205  * Interface operations
206  */
207 struct aac_interface
208 {
209 	int	(*aif_get_fwstatus)(struct aac_softc *sc);
210 	void	(*aif_qnotify)(struct aac_softc *sc, int qbit);
211 	int	(*aif_get_istatus)(struct aac_softc *sc);
212 	void	(*aif_clr_istatus)(struct aac_softc *sc, int mask);
213 	void	(*aif_set_mailbox)(struct aac_softc *sc, u_int32_t command,
214 				   u_int32_t arg0, u_int32_t arg1,
215 				   u_int32_t arg2, u_int32_t arg3);
216 	int	(*aif_get_mailbox)(struct aac_softc *sc, int mb);
217 	void	(*aif_set_interrupts)(struct aac_softc *sc, int enable);
218 };
219 extern struct aac_interface	aac_rx_interface;
220 extern struct aac_interface	aac_sa_interface;
221 extern struct aac_interface	aac_fa_interface;
222 
223 #define AAC_GET_FWSTATUS(sc)		((sc)->aac_if.aif_get_fwstatus((sc)))
224 #define AAC_QNOTIFY(sc, qbit)		((sc)->aac_if.aif_qnotify((sc), (qbit)))
225 #define AAC_GET_ISTATUS(sc)		((sc)->aac_if.aif_get_istatus((sc)))
226 #define AAC_CLEAR_ISTATUS(sc, mask)	((sc)->aac_if.aif_clr_istatus((sc), \
227 					(mask)))
228 #define AAC_SET_MAILBOX(sc, command, arg0, arg1, arg2, arg3) \
229 	((sc)->aac_if.aif_set_mailbox((sc), (command), (arg0), (arg1), (arg2), \
230 	(arg3)))
231 #define AAC_GET_MAILBOX(sc, mb)		((sc)->aac_if.aif_get_mailbox((sc), \
232 					(mb)))
233 #define	AAC_MASK_INTERRUPTS(sc)		((sc)->aac_if.aif_set_interrupts((sc), \
234 					0))
235 #define AAC_UNMASK_INTERRUPTS(sc)	((sc)->aac_if.aif_set_interrupts((sc), \
236 					1))
237 
238 #define AAC_SETREG4(sc, reg, val)	bus_space_write_4(sc->aac_btag, \
239 					sc->aac_bhandle, reg, val)
240 #define AAC_GETREG4(sc, reg)		bus_space_read_4 (sc->aac_btag, \
241 					sc->aac_bhandle, reg)
242 #define AAC_SETREG2(sc, reg, val)	bus_space_write_2(sc->aac_btag, \
243 					sc->aac_bhandle, reg, val)
244 #define AAC_GETREG2(sc, reg)		bus_space_read_2 (sc->aac_btag, \
245 					sc->aac_bhandle, reg)
246 #define AAC_SETREG1(sc, reg, val)	bus_space_write_1(sc->aac_btag, \
247 					sc->aac_bhandle, reg, val)
248 #define AAC_GETREG1(sc, reg)		bus_space_read_1 (sc->aac_btag, \
249 					sc->aac_bhandle, reg)
250 
251 TAILQ_HEAD(aac_container_tq, aac_container);
252 
253 /* Define the OS version specific locks */
254 #if __FreeBSD_version >= 500005
255 #include <sys/lock.h>
256 #include <sys/mutex.h>
257 typedef struct mtx aac_lock_t;
258 #define AAC_LOCK_INIT(l, s)	mtx_init(l, s, MTX_DEF)
259 #define AAC_LOCK_ACQUIRE(l)	mtx_lock(l)
260 #define AAC_LOCK_RELEASE(l)	mtx_unlock(l)
261 #else
262 typedef struct simplelock aac_lock_t;
263 #define AAC_LOCK_INIT(l, s)	simple_lock_init(l)
264 #define AAC_LOCK_ACQUIRE(l)	simple_lock(l)
265 #define AAC_LOCK_RELEASE(l)	simple_unlock(l)
266 #endif
267 
268 #if __FreeBSD_version >= 500005
269 #include <sys/selinfo.h>
270 #else
271 #include <sys/select.h>
272 #endif
273 
274 /*
275  * Per-controller structure.
276  */
277 struct aac_softc
278 {
279 	/* bus connections */
280 	device_t		aac_dev;
281 	struct resource		*aac_regs_resource;	/* register interface
282 							 * window */
283 	int			aac_regs_rid;		/* resource ID */
284 	bus_space_handle_t	aac_bhandle;		/* bus space handle */
285 	bus_space_tag_t		aac_btag;		/* bus space tag */
286 	bus_dma_tag_t		aac_parent_dmat;	/* parent DMA tag */
287 	bus_dma_tag_t		aac_buffer_dmat;	/* data buffer/command
288 							 * DMA tag */
289 	struct resource		*aac_irq;		/* interrupt */
290 	int			aac_irq_rid;
291 	void			*aac_intr;		/* interrupt handle */
292 
293 	/* controller features, limits and status */
294 	int			aac_state;
295 #define AAC_STATE_SUSPEND	(1<<0)
296 #define	AAC_STATE_OPEN		(1<<1)
297 #define AAC_STATE_INTERRUPTS_ON	(1<<2)
298 #define AAC_STATE_AIF_SLEEPER	(1<<3)
299 	struct FsaRevision		aac_revision;
300 
301 	/* controller hardware interface */
302 	int			aac_hwif;
303 #define AAC_HWIF_I960RX		0
304 #define AAC_HWIF_STRONGARM	1
305 #define	AAC_HWIF_FALCON		2
306 #define AAC_HWIF_UNKNOWN	-1
307 	bus_dma_tag_t		aac_common_dmat;	/* common structure
308 							 * DMA tag */
309 	bus_dmamap_t		aac_common_dmamap;	/* common structure
310 							 * DMA map */
311 	struct aac_common	*aac_common;
312 	u_int32_t		aac_common_busaddr;
313 	struct aac_interface	aac_if;
314 
315 	/* command/fib resources */
316 	bus_dma_tag_t		aac_fib_dmat;	/* DMA tag for allocing FIBs */
317 	struct aac_fib		*aac_fibs;
318 	bus_dmamap_t		aac_fibmap;
319 	u_int32_t		aac_fibphys;
320 	struct aac_command	aac_command[AAC_FIB_COUNT];
321 
322 	/* command management */
323 	TAILQ_HEAD(,aac_command) aac_free;	/* command structures
324 						 * available for reuse */
325 	TAILQ_HEAD(,aac_command) aac_ready;	/* commands on hold for
326 						 * controller resources */
327 	TAILQ_HEAD(,aac_command) aac_busy;
328 	TAILQ_HEAD(,aac_command) aac_complete;	/* commands which have been
329 						 * returned by the controller */
330 	struct bio_queue_head	aac_bioq;
331 	struct aac_queue_table	*aac_queues;
332 	struct aac_queue_entry	*aac_qentries[AAC_QUEUE_COUNT];
333 
334 	struct aac_qstat	aac_qstat[AACQ_COUNT];	/* queue statistics */
335 
336 	/* connected containters */
337 	struct aac_container_tq	aac_container_tqh;
338 	aac_lock_t		aac_container_lock;
339 
340 	/* Protect the sync fib */
341 #define AAC_SYNC_LOCK_FORCE	(1 << 0)
342 	aac_lock_t		aac_sync_lock;
343 
344 	/* delayed activity infrastructure */
345 #if __FreeBSD_version >= 500005
346 	struct task		aac_task_complete;	/* deferred-completion
347 							 * task */
348 #endif
349 	struct intr_config_hook	aac_ich;
350 
351 	/* management interface */
352 	dev_t			aac_dev_t;
353 	aac_lock_t		aac_aifq_lock;
354 	struct aac_aif_command	aac_aifq[AAC_AIFQ_LENGTH];
355 	int			aac_aifq_head;
356 	int			aac_aifq_tail;
357 	struct selinfo		rcv_select;
358 	struct proc		*aifthread;
359 	int			aifflags;
360 #define AAC_AIFFLAGS_RUNNING	(1 << 0)
361 #define AAC_AIFFLAGS_PENDING	(1 << 1)
362 #define	AAC_AIFFLAGS_EXIT	(1 << 2)
363 #define AAC_AIFFLAGS_EXITED	(1 << 3)
364 	u_int32_t		flags;
365 #define AAC_FLAGS_PERC2QC	(1 << 0)
366 #define	AAC_FLAGS_ENABLE_CAM	(1 << 1)	/* No SCSI passthrough */
367 #define	AAC_FLAGS_CAM_NORESET	(1 << 2)	/* Fake SCSI resets */
368 #define	AAC_FLAGS_CAM_PASSONLY	(1 << 3)	/* Only create pass devices */
369 #define	AAC_FLAGS_4GB_WINDOW	(1 << 5)	/* Device can access host mem
370  						 * 2GB-4GB range */
371 #define	AAC_FLAGS_NO4GB		(1 << 6)	/* Can't access host mem >2GB */
372 #define	AAC_FLAGS_256FIBS	(1 << 7)	/* Can only do 256 commands */
373 
374 	u_int32_t		supported_options;
375 	u_int32_t		scsi_method_id;
376 };
377 
378 
379 /*
380  * Public functions
381  */
382 extern void		aac_free(struct aac_softc *sc);
383 extern int		aac_attach(struct aac_softc *sc);
384 extern int		aac_detach(device_t dev);
385 extern int		aac_shutdown(device_t dev);
386 extern int		aac_suspend(device_t dev);
387 extern int		aac_resume(device_t dev);
388 extern void		aac_intr(void *arg);
389 extern devclass_t	aac_devclass;
390 extern void		aac_submit_bio(struct bio *bp);
391 extern void		aac_biodone(struct bio *bp);
392 extern int		aac_dump_enqueue(struct aac_disk *ad, u_int32_t lba,
393 					 void *data, int nblks);
394 extern void		aac_dump_complete(struct aac_softc *sc);
395 extern void		aac_startio(struct aac_softc *sc);
396 extern int		aac_alloc_command(struct aac_softc *sc,
397 					  struct aac_command **cmp);
398 extern void		aac_release_command(struct aac_command *cm);
399 extern int		aac_alloc_sync_fib(struct aac_softc *sc,
400 					 struct aac_fib **fib, int flags);
401 extern void		aac_release_sync_fib(struct aac_softc *sc);
402 extern int		aac_sync_fib(struct aac_softc *sc, u_int32_t command,
403 				     u_int32_t xferstate, struct aac_fib *fib,
404 				     u_int16_t datasize);
405 
406 /*
407  * Debugging levels:
408  *  0 - quiet, only emit warnings
409  *  1 - noisy, emit major function points and things done
410  *  2 - extremely noisy, emit trace items in loops, etc.
411  */
412 #ifdef AAC_DEBUG
413 # define debug(level, fmt, args...)					\
414 	do {								\
415 	if (level <=AAC_DEBUG) printf("%s: " fmt "\n", __FUNCTION__ , ##args); \
416 	} while (0)
417 # define debug_called(level)						\
418 	do {								\
419 	if (level <= AAC_DEBUG) printf(__FUNCTION__ ": called\n");	\
420 	} while (0)
421 
422 extern void	aac_print_queues(struct aac_softc *sc);
423 extern void	aac_panic(struct aac_softc *sc, char *reason);
424 extern void	aac_print_fib(struct aac_softc *sc, struct aac_fib *fib,
425 			      char *caller);
426 extern void	aac_print_aif(struct aac_softc *sc,
427 			      struct aac_aif_command *aif);
428 
429 # define AAC_PRINT_FIB(sc, fib)	aac_print_fib(sc, fib, __FUNCTION__)
430 
431 #else
432 # define debug(level, fmt, args...)
433 # define debug_called(level)
434 
435 # define aac_print_queues(sc)
436 # define aac_panic(sc, reason)
437 
438 # define AAC_PRINT_FIB(sc, fib)
439 # define aac_print_aif(sc, aac_aif_command)
440 #endif
441 
442 struct aac_code_lookup {
443 	char	*string;
444 	u_int32_t	code;
445 };
446 
447 /*
448  * Queue primitives for driver queues.
449  */
450 #define AACQ_ADD(sc, qname)					\
451 	do {							\
452 		struct aac_qstat *qs;				\
453 								\
454 		qs = &(sc)->aac_qstat[qname];			\
455 								\
456 		qs->q_length++;					\
457 		if (qs->q_length > qs->q_max)			\
458 			qs->q_max = qs->q_length;		\
459 	} while (0)
460 
461 #define AACQ_REMOVE(sc, qname)    (sc)->aac_qstat[qname].q_length--
462 #define AACQ_INIT(sc, qname)				\
463 	do {						\
464 		sc->aac_qstat[qname].q_length = 0;	\
465 		sc->aac_qstat[qname].q_max = 0;		\
466 	} while (0)
467 
468 
469 #define AACQ_COMMAND_QUEUE(name, index)					\
470 static __inline void							\
471 aac_initq_ ## name (struct aac_softc *sc)				\
472 {									\
473 	TAILQ_INIT(&sc->aac_ ## name);					\
474 	AACQ_INIT(sc, index);						\
475 }									\
476 static __inline void							\
477 aac_enqueue_ ## name (struct aac_command *cm)				\
478 {									\
479 	int s;								\
480 									\
481 	s = splbio();							\
482 	if ((cm->cm_flags & AAC_ON_AACQ_MASK) != 0) {			\
483 		printf("command %p is on another queue, flags = %#x\n",	\
484 		       cm, cm->cm_flags);				\
485 		panic("command is on another queue");			\
486 	}								\
487 	TAILQ_INSERT_TAIL(&cm->cm_sc->aac_ ## name, cm, cm_link);	\
488 	cm->cm_flags |= AAC_ON_ ## index;				\
489 	AACQ_ADD(cm->cm_sc, index);					\
490 	splx(s);							\
491 }									\
492 static __inline void							\
493 aac_requeue_ ## name (struct aac_command *cm)				\
494 {									\
495 	int s;								\
496 									\
497 	s = splbio();							\
498 	if ((cm->cm_flags & AAC_ON_AACQ_MASK) != 0) {			\
499 		printf("command %p is on another queue, flags = %#x\n",	\
500 		       cm, cm->cm_flags);				\
501 		panic("command is on another queue");			\
502 	}								\
503 	TAILQ_INSERT_HEAD(&cm->cm_sc->aac_ ## name, cm, cm_link);	\
504 	cm->cm_flags |= AAC_ON_ ## index;				\
505 	AACQ_ADD(cm->cm_sc, index);					\
506 	splx(s);							\
507 }									\
508 static __inline struct aac_command *					\
509 aac_dequeue_ ## name (struct aac_softc *sc)				\
510 {									\
511 	struct aac_command *cm;						\
512 	int s;								\
513 									\
514 	s = splbio();							\
515 	if ((cm = TAILQ_FIRST(&sc->aac_ ## name)) != NULL) {		\
516 		if ((cm->cm_flags & AAC_ON_ ## index) == 0) {		\
517 			printf("command %p not in queue, flags = %#x, "	\
518 		       	       "bit = %#x\n", cm, cm->cm_flags,		\
519 			       AAC_ON_ ## index);			\
520 			panic("command not in queue");			\
521 		}							\
522 		TAILQ_REMOVE(&sc->aac_ ## name, cm, cm_link);		\
523 		cm->cm_flags &= ~AAC_ON_ ## index;			\
524 		AACQ_REMOVE(sc, index);					\
525 	}								\
526 	splx(s);							\
527 	return(cm);							\
528 }									\
529 static __inline void							\
530 aac_remove_ ## name (struct aac_command *cm)				\
531 {									\
532 	int s;								\
533 									\
534 	s = splbio();							\
535 	if ((cm->cm_flags & AAC_ON_ ## index) == 0) {			\
536 		printf("command %p not in queue, flags = %#x, "		\
537 		       "bit = %#x\n", cm, cm->cm_flags, 		\
538 		       AAC_ON_ ## index);				\
539 		panic("command not in queue");				\
540 	}								\
541 	TAILQ_REMOVE(&cm->cm_sc->aac_ ## name, cm, cm_link);		\
542 	cm->cm_flags &= ~AAC_ON_ ## index;				\
543 	AACQ_REMOVE(cm->cm_sc, index);					\
544 	splx(s);							\
545 }									\
546 struct hack
547 
548 AACQ_COMMAND_QUEUE(free, AACQ_FREE);
549 AACQ_COMMAND_QUEUE(ready, AACQ_READY);
550 AACQ_COMMAND_QUEUE(busy, AACQ_BUSY);
551 AACQ_COMMAND_QUEUE(complete, AACQ_COMPLETE);
552 
553 /*
554  * outstanding bio queue
555  */
556 static __inline void
557 aac_initq_bio(struct aac_softc *sc)
558 {
559 	bioq_init(&sc->aac_bioq);
560 	AACQ_INIT(sc, AACQ_BIO);
561 }
562 
563 static __inline void
564 aac_enqueue_bio(struct aac_softc *sc, struct bio *bp)
565 {
566 	int s;
567 
568 	s = splbio();
569 	bioq_insert_tail(&sc->aac_bioq, bp);
570 	AACQ_ADD(sc, AACQ_BIO);
571 	splx(s);
572 }
573 
574 static __inline struct bio *
575 aac_dequeue_bio(struct aac_softc *sc)
576 {
577 	int s;
578 	struct bio *bp;
579 
580 	s = splbio();
581 	if ((bp = bioq_first(&sc->aac_bioq)) != NULL) {
582 		bioq_remove(&sc->aac_bioq, bp);
583 		AACQ_REMOVE(sc, AACQ_BIO);
584 	}
585 	splx(s);
586 	return(bp);
587 }
588 
589 static __inline void
590 aac_print_printf(struct aac_softc *sc)
591 {
592 	/*
593 	 * XXX We have the ability to read the length of the printf string
594 	 * from out of the mailboxes.
595 	 */
596 	device_printf(sc->aac_dev, "**Monitor** %.*s", AAC_PRINTF_BUFSIZE,
597 		      sc->aac_common->ac_printf);
598 	AAC_QNOTIFY(sc, AAC_DB_PRINTF);
599 }
600