Style(9) cleanup to src/sys/vfs, stage 20/21: umapfs.
[dragonfly.git] / sys / dev / raid / aac / aac.c
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/aac.c,v 1.9.2.14 2003/04/08 13:22:08 scottl Exp $
30  *      $DragonFly: src/sys/dev/raid/aac/aac.c,v 1.11 2004/05/13 23:49:18 dillon Exp $
31  */
32
33 /*
34  * Driver for the Adaptec 'FSA' family of PCI/SCSI RAID adapters.
35  */
36
37 #include "opt_aac.h"
38
39 /* #include <stddef.h> */
40 #include <sys/param.h>
41 #include <sys/systm.h>
42 #include <sys/malloc.h>
43 #include <sys/kernel.h>
44 #include <sys/kthread.h>
45 #include <sys/sysctl.h>
46 #include <sys/poll.h>
47 #if defined(__FreeBSD__) && __FreeBSD_version >= 500005
48 #include <sys/selinfo.h>
49 #else
50 #include <sys/select.h>
51 #endif
52
53 #include "aac_compat.h"
54
55 #include <sys/bus.h>
56 #include <sys/conf.h>
57 #include <sys/devicestat.h>
58 #include <sys/disk.h>
59 #include <sys/signalvar.h>
60 #include <sys/time.h>
61 #include <sys/eventhandler.h>
62
63 #include <machine/bus_memio.h>
64 #include <machine/bus.h>
65 #include <machine/resource.h>
66
67 #include "aacreg.h"
68 #include "aac_ioctl.h"
69 #include "aacvar.h"
70 #include "aac_tables.h"
71 #include "aac_cam.h"
72
73 static void     aac_startup(void *arg);
74 static void     aac_add_container(struct aac_softc *sc,
75                                   struct aac_mntinforesp *mir, int f);
76 static void     aac_get_bus_info(struct aac_softc *sc);
77
78 /* Command Processing */
79 static void     aac_timeout(struct aac_softc *sc);
80 static int      aac_start(struct aac_command *cm);
81 static void     aac_complete(void *context, int pending);
82 static int      aac_bio_command(struct aac_softc *sc, struct aac_command **cmp);
83 static void     aac_bio_complete(struct aac_command *cm);
84 static int      aac_wait_command(struct aac_command *cm, int timeout);
85 static void     aac_host_command(struct aac_softc *sc);
86 static void     aac_host_response(struct aac_softc *sc);
87
88 /* Command Buffer Management */
89 static void     aac_map_command_helper(void *arg, bus_dma_segment_t *segs,
90                                        int nseg, int error);
91 static int      aac_alloc_commands(struct aac_softc *sc);
92 static void     aac_free_commands(struct aac_softc *sc);
93 static void     aac_map_command(struct aac_command *cm);
94 static void     aac_unmap_command(struct aac_command *cm);
95
96 /* Hardware Interface */
97 static void     aac_common_map(void *arg, bus_dma_segment_t *segs, int nseg,
98                                int error);
99 static int      aac_check_firmware(struct aac_softc *sc);
100 static int      aac_init(struct aac_softc *sc);
101 static int      aac_sync_command(struct aac_softc *sc, u_int32_t command,
102                                  u_int32_t arg0, u_int32_t arg1, u_int32_t arg2,
103                                  u_int32_t arg3, u_int32_t *sp);
104 static int      aac_enqueue_fib(struct aac_softc *sc, int queue,
105                                 struct aac_command *cm);
106 static int      aac_dequeue_fib(struct aac_softc *sc, int queue,
107                                 u_int32_t *fib_size, struct aac_fib **fib_addr);
108 static int      aac_enqueue_response(struct aac_softc *sc, int queue,
109                                      struct aac_fib *fib);
110
111 /* Falcon/PPC interface */
112 static int      aac_fa_get_fwstatus(struct aac_softc *sc);
113 static void     aac_fa_qnotify(struct aac_softc *sc, int qbit);
114 static int      aac_fa_get_istatus(struct aac_softc *sc);
115 static void     aac_fa_clear_istatus(struct aac_softc *sc, int mask);
116 static void     aac_fa_set_mailbox(struct aac_softc *sc, u_int32_t command,
117                                    u_int32_t arg0, u_int32_t arg1,
118                                    u_int32_t arg2, u_int32_t arg3);
119 static int      aac_fa_get_mailbox(struct aac_softc *sc, int mb);
120 static void     aac_fa_set_interrupts(struct aac_softc *sc, int enable);
121
122 struct aac_interface aac_fa_interface = {
123         aac_fa_get_fwstatus,
124         aac_fa_qnotify,
125         aac_fa_get_istatus,
126         aac_fa_clear_istatus,
127         aac_fa_set_mailbox,
128         aac_fa_get_mailbox,
129         aac_fa_set_interrupts
130 };
131
132 /* StrongARM interface */
133 static int      aac_sa_get_fwstatus(struct aac_softc *sc);
134 static void     aac_sa_qnotify(struct aac_softc *sc, int qbit);
135 static int      aac_sa_get_istatus(struct aac_softc *sc);
136 static void     aac_sa_clear_istatus(struct aac_softc *sc, int mask);
137 static void     aac_sa_set_mailbox(struct aac_softc *sc, u_int32_t command,
138                                    u_int32_t arg0, u_int32_t arg1,
139                                    u_int32_t arg2, u_int32_t arg3);
140 static int      aac_sa_get_mailbox(struct aac_softc *sc, int mb);
141 static void     aac_sa_set_interrupts(struct aac_softc *sc, int enable);
142
143 struct aac_interface aac_sa_interface = {
144         aac_sa_get_fwstatus,
145         aac_sa_qnotify,
146         aac_sa_get_istatus,
147         aac_sa_clear_istatus,
148         aac_sa_set_mailbox,
149         aac_sa_get_mailbox,
150         aac_sa_set_interrupts
151 };
152
153 /* i960Rx interface */  
154 static int      aac_rx_get_fwstatus(struct aac_softc *sc);
155 static void     aac_rx_qnotify(struct aac_softc *sc, int qbit);
156 static int      aac_rx_get_istatus(struct aac_softc *sc);
157 static void     aac_rx_clear_istatus(struct aac_softc *sc, int mask);
158 static void     aac_rx_set_mailbox(struct aac_softc *sc, u_int32_t command,
159                                    u_int32_t arg0, u_int32_t arg1,
160                                    u_int32_t arg2, u_int32_t arg3);
161 static int      aac_rx_get_mailbox(struct aac_softc *sc, int mb);
162 static void     aac_rx_set_interrupts(struct aac_softc *sc, int enable);
163
164 struct aac_interface aac_rx_interface = {
165         aac_rx_get_fwstatus,
166         aac_rx_qnotify,
167         aac_rx_get_istatus,
168         aac_rx_clear_istatus,
169         aac_rx_set_mailbox,
170         aac_rx_get_mailbox,
171         aac_rx_set_interrupts
172 };
173
174 /* Debugging and Diagnostics */
175 static void     aac_describe_controller(struct aac_softc *sc);
176 static char     *aac_describe_code(struct aac_code_lookup *table,
177                                    u_int32_t code);
178
179 /* Management Interface */
180 static d_open_t         aac_open;
181 static d_close_t        aac_close;
182 static d_ioctl_t        aac_ioctl;
183 static d_poll_t         aac_poll;
184 static int              aac_ioctl_sendfib(struct aac_softc *sc, caddr_t ufib);
185 static void             aac_handle_aif(struct aac_softc *sc,
186                                            struct aac_fib *fib);
187 static int              aac_rev_check(struct aac_softc *sc, caddr_t udata);
188 static int              aac_getnext_aif(struct aac_softc *sc, caddr_t arg);
189 static int              aac_return_aif(struct aac_softc *sc, caddr_t uptr);
190 static int              aac_query_disk(struct aac_softc *sc, caddr_t uptr);
191
192 #define AAC_CDEV_MAJOR  150
193
194 static struct cdevsw aac_cdevsw = {
195         "aac",                  /* name */
196         AAC_CDEV_MAJOR,         /* major */
197         0,                      /* flags */
198         NULL,                   /* port */
199         NULL,                   /* clone */
200
201         aac_open,               /* open */
202         aac_close,              /* close */
203         noread,                 /* read */
204         nowrite,                /* write */
205         aac_ioctl,              /* ioctl */
206         aac_poll,               /* poll */
207         nommap,                 /* mmap */
208         nostrategy,             /* strategy */
209         nodump,                 /* dump */
210         nopsize                 /* psize */
211 };
212
213 DECLARE_DUMMY_MODULE(aac);
214
215 MALLOC_DEFINE(M_AACBUF, "aacbuf", "Buffers for the AAC driver");
216
217 /* sysctl node */
218 SYSCTL_NODE(_hw, OID_AUTO, aac, CTLFLAG_RD, 0, "AAC driver parameters");
219
220 /*
221  * Device Interface
222  */
223
224 /*
225  * Initialise the controller and softc
226  */
227 int
228 aac_attach(struct aac_softc *sc)
229 {
230         int error, unit;
231
232         debug_called(1);
233
234         /*
235          * Initialise per-controller queues.
236          */
237         aac_initq_free(sc);
238         aac_initq_ready(sc);
239         aac_initq_busy(sc);
240         aac_initq_complete(sc);
241         aac_initq_bio(sc);
242
243 #if defined(__FreeBSD__) && __FreeBSD_version >= 500005
244         /*
245          * Initialise command-completion task.
246          */
247         TASK_INIT(&sc->aac_task_complete, 0, aac_complete, sc);
248 #endif
249
250         /* disable interrupts before we enable anything */
251         AAC_MASK_INTERRUPTS(sc);
252
253         /* mark controller as suspended until we get ourselves organised */
254         sc->aac_state |= AAC_STATE_SUSPEND;
255
256         /*
257          * Check that the firmware on the card is supported.
258          */
259         if ((error = aac_check_firmware(sc)) != 0)
260                 return(error);
261
262         /* Init the sync fib lock */
263         AAC_LOCK_INIT(&sc->aac_sync_lock, "AAC sync FIB lock");
264
265         /*
266          * Initialise the adapter.
267          */
268         if ((error = aac_init(sc)) != 0)
269                 return(error);
270
271         /* 
272          * Print a little information about the controller.
273          */
274         aac_describe_controller(sc);
275
276         /*
277          * Register to probe our containers later.
278          */
279         TAILQ_INIT(&sc->aac_container_tqh);
280         AAC_LOCK_INIT(&sc->aac_container_lock, "AAC container lock");
281
282         /*
283          * Lock for the AIF queue
284          */
285         AAC_LOCK_INIT(&sc->aac_aifq_lock, "AAC AIF lock");
286
287         sc->aac_ich.ich_func = aac_startup;
288         sc->aac_ich.ich_arg = sc;
289         if (config_intrhook_establish(&sc->aac_ich) != 0) {
290                 device_printf(sc->aac_dev,
291                               "can't establish configuration hook\n");
292                 return(ENXIO);
293         }
294
295         /*
296          * Make the control device.
297          */
298         unit = device_get_unit(sc->aac_dev);
299         sc->aac_dev_t = make_dev(&aac_cdevsw, unit, UID_ROOT, GID_WHEEL, 0644,
300                                  "aac%d", unit);
301 #if defined(__FreeBSD__) && __FreeBSD_version > 500005
302         (void)make_dev_alias(sc->aac_dev_t, "afa%d", unit);
303         (void)make_dev_alias(sc->aac_dev_t, "hpn%d", unit);
304 #endif
305         sc->aac_dev_t->si_drv1 = sc;
306
307         /* Create the AIF thread */
308 #if defined(__FreeBSD__) && __FreeBSD_version > 500005
309         if (kthread_create((void(*)(void *))aac_host_command, sc,
310                            &sc->aifthread, 0, "aac%daif", unit))
311 #else
312         if (kthread_create((void(*)(void *))aac_host_command, sc,
313                            &sc->aifthread, "aac%daif", unit))
314 #endif
315                 panic("Could not create AIF thread\n");
316
317         /* Register the shutdown method to only be called post-dump */
318         if ((EVENTHANDLER_REGISTER(shutdown_final, aac_shutdown, sc->aac_dev,
319                                    SHUTDOWN_PRI_DEFAULT)) == NULL)
320         device_printf(sc->aac_dev, "shutdown event registration failed\n");
321
322         /* Register with CAM for the non-DASD devices */
323         if ((sc->flags & AAC_FLAGS_ENABLE_CAM) != 0)
324                 aac_get_bus_info(sc);
325
326         return(0);
327 }
328
329 /*
330  * Probe for containers, create disks.
331  */
332 static void
333 aac_startup(void *arg)
334 {
335         struct aac_softc *sc;
336         struct aac_fib *fib;
337         struct aac_mntinfo *mi;
338         struct aac_mntinforesp *mir = NULL;
339         int i = 0;
340
341         debug_called(1);
342
343         sc = (struct aac_softc *)arg;
344
345         /* disconnect ourselves from the intrhook chain */
346         config_intrhook_disestablish(&sc->aac_ich);
347
348         aac_alloc_sync_fib(sc, &fib, 0);
349         mi = (struct aac_mntinfo *)&fib->data[0];
350
351         /* loop over possible containers */
352         do {
353                 /* request information on this container */
354                 bzero(mi, sizeof(struct aac_mntinfo));
355                 mi->Command = VM_NameServe;
356                 mi->MntType = FT_FILESYS;
357                 mi->MntCount = i;
358                 if (aac_sync_fib(sc, ContainerCommand, 0, fib,
359                                  sizeof(struct aac_mntinfo))) {
360                         debug(2, "error probing container %d", i);
361                         continue;
362                 }
363
364                 mir = (struct aac_mntinforesp *)&fib->data[0];
365                 aac_add_container(sc, mir, 0);
366                 i++;
367         } while ((i < mir->MntRespCount) && (i < AAC_MAX_CONTAINERS));
368
369         aac_release_sync_fib(sc);
370
371         /* poke the bus to actually attach the child devices */
372         if (bus_generic_attach(sc->aac_dev))
373                 device_printf(sc->aac_dev, "bus_generic_attach failed\n");
374
375         /* mark the controller up */
376         sc->aac_state &= ~AAC_STATE_SUSPEND;
377
378         /* enable interrupts now */
379         AAC_UNMASK_INTERRUPTS(sc);
380
381         /* enable the timeout watchdog */
382         timeout((timeout_t*)aac_timeout, sc, AAC_PERIODIC_INTERVAL * hz);
383 }
384
385 /*
386  * Create a device to respresent a new container
387  */
388 static void
389 aac_add_container(struct aac_softc *sc, struct aac_mntinforesp *mir, int f)
390 {
391         struct aac_container *co;
392         device_t child;
393
394         /* 
395          * Check container volume type for validity.  Note that many of
396          * the possible types may never show up.
397          */
398         if ((mir->Status == ST_OK) && (mir->MntTable[0].VolType != CT_NONE)) {
399                 MALLOC(co, struct aac_container *, sizeof *co, M_AACBUF,
400                        M_NOWAIT);
401                 if (co == NULL)
402                         panic("Out of memory?!\n");
403                 debug(1, "id %x  name '%.16s'  size %u  type %d", 
404                       mir->MntTable[0].ObjectId,
405                       mir->MntTable[0].FileSystemName,
406                       mir->MntTable[0].Capacity, mir->MntTable[0].VolType);
407         
408                 if ((child = device_add_child(sc->aac_dev, "aacd", -1)) == NULL)
409                         device_printf(sc->aac_dev, "device_add_child failed\n");
410                 else
411                         device_set_ivars(child, co);
412                 device_set_desc(child, aac_describe_code(aac_container_types,
413                                 mir->MntTable[0].VolType));
414                 co->co_disk = child;
415                 co->co_found = f;
416                 bcopy(&mir->MntTable[0], &co->co_mntobj,
417                       sizeof(struct aac_mntobj));
418                 AAC_LOCK_ACQUIRE(&sc->aac_container_lock);
419                 TAILQ_INSERT_TAIL(&sc->aac_container_tqh, co, co_link);
420                 AAC_LOCK_RELEASE(&sc->aac_container_lock);
421         }
422 }
423
424 /*
425  * Free all of the resources associated with (sc)
426  *
427  * Should not be called if the controller is active.
428  */
429 void
430 aac_free(struct aac_softc *sc)
431 {
432         debug_called(1);
433
434         /* remove the control device */
435         if (sc->aac_dev_t != NULL)
436                 destroy_dev(sc->aac_dev_t);
437
438         /* throw away any FIB buffers, discard the FIB DMA tag */
439         if (sc->aac_fibs != NULL)
440                 aac_free_commands(sc);
441         if (sc->aac_fib_dmat)
442                 bus_dma_tag_destroy(sc->aac_fib_dmat);
443
444         /* destroy the common area */
445         if (sc->aac_common) {
446                 bus_dmamap_unload(sc->aac_common_dmat, sc->aac_common_dmamap);
447                 bus_dmamem_free(sc->aac_common_dmat, sc->aac_common,
448                                 sc->aac_common_dmamap);
449         }
450         if (sc->aac_common_dmat)
451                 bus_dma_tag_destroy(sc->aac_common_dmat);
452
453         /* disconnect the interrupt handler */
454         if (sc->aac_intr)
455                 bus_teardown_intr(sc->aac_dev, sc->aac_irq, sc->aac_intr);
456         if (sc->aac_irq != NULL)
457                 bus_release_resource(sc->aac_dev, SYS_RES_IRQ, sc->aac_irq_rid,
458                                      sc->aac_irq);
459
460         /* destroy data-transfer DMA tag */
461         if (sc->aac_buffer_dmat)
462                 bus_dma_tag_destroy(sc->aac_buffer_dmat);
463
464         /* destroy the parent DMA tag */
465         if (sc->aac_parent_dmat)
466                 bus_dma_tag_destroy(sc->aac_parent_dmat);
467
468         /* release the register window mapping */
469         if (sc->aac_regs_resource != NULL)
470                 bus_release_resource(sc->aac_dev, SYS_RES_MEMORY,
471                                      sc->aac_regs_rid, sc->aac_regs_resource);
472 }
473
474 /*
475  * Disconnect from the controller completely, in preparation for unload.
476  */
477 int
478 aac_detach(device_t dev)
479 {
480         struct aac_softc *sc;
481 #if AAC_BROKEN
482         int error;
483 #endif
484
485         debug_called(1);
486
487         sc = device_get_softc(dev);
488
489         if (sc->aac_state & AAC_STATE_OPEN)
490         return(EBUSY);
491
492 #if AAC_BROKEN
493         if (sc->aifflags & AAC_AIFFLAGS_RUNNING) {
494                 sc->aifflags |= AAC_AIFFLAGS_EXIT;
495                 wakeup(sc->aifthread);
496                 tsleep(sc->aac_dev, PCATCH, "aacdch", 30 * hz);
497         }
498
499         if (sc->aifflags & AAC_AIFFLAGS_RUNNING)
500                 panic("Cannot shutdown AIF thread\n");
501
502         if ((error = aac_shutdown(dev)))
503                 return(error);
504
505         aac_free(sc);
506
507         return(0);
508 #else
509         return (EBUSY);
510 #endif
511 }
512
513 /*
514  * Bring the controller down to a dormant state and detach all child devices.
515  *
516  * This function is called before detach or system shutdown.
517  *
518  * Note that we can assume that the bioq on the controller is empty, as we won't
519  * allow shutdown if any device is open.
520  */
521 int
522 aac_shutdown(device_t dev)
523 {
524         struct aac_softc *sc;
525         struct aac_fib *fib;
526         struct aac_close_command *cc;
527         int s;
528
529         debug_called(1);
530
531         sc = device_get_softc(dev);
532
533         s = splbio();
534
535         sc->aac_state |= AAC_STATE_SUSPEND;
536
537         /* 
538          * Send a Container shutdown followed by a HostShutdown FIB to the
539          * controller to convince it that we don't want to talk to it anymore.
540          * We've been closed and all I/O completed already
541          */
542         device_printf(sc->aac_dev, "shutting down controller...");
543
544         aac_alloc_sync_fib(sc, &fib, AAC_SYNC_LOCK_FORCE);
545         cc = (struct aac_close_command *)&fib->data[0];
546
547         bzero(cc, sizeof(struct aac_close_command));
548         cc->Command = VM_CloseAll;
549         cc->ContainerId = 0xffffffff;
550         if (aac_sync_fib(sc, ContainerCommand, 0, fib,
551             sizeof(struct aac_close_command)))
552                 printf("FAILED.\n");
553         else {
554                 fib->data[0] = 0;
555                 /*
556                  * XXX Issuing this command to the controller makes it shut down
557                  * but also keeps it from coming back up without a reset of the
558                  * PCI bus.  This is not desirable if you are just unloading the
559                  * driver module with the intent to reload it later.
560                  */
561                 if (aac_sync_fib(sc, FsaHostShutdown, AAC_FIBSTATE_SHUTDOWN,
562                     fib, 1)) {
563                         printf("FAILED.\n");
564                 } else {
565                         printf("done.\n");
566                 }
567         }
568
569         AAC_MASK_INTERRUPTS(sc);
570
571         splx(s);
572         return(0);
573 }
574
575 /*
576  * Bring the controller to a quiescent state, ready for system suspend.
577  */
578 int
579 aac_suspend(device_t dev)
580 {
581         struct aac_softc *sc;
582         int s;
583
584         debug_called(1);
585
586         sc = device_get_softc(dev);
587
588         s = splbio();
589
590         sc->aac_state |= AAC_STATE_SUSPEND;
591         
592         AAC_MASK_INTERRUPTS(sc);
593         splx(s);
594         return(0);
595 }
596
597 /*
598  * Bring the controller back to a state ready for operation.
599  */
600 int
601 aac_resume(device_t dev)
602 {
603         struct aac_softc *sc;
604
605         debug_called(1);
606
607         sc = device_get_softc(dev);
608
609         sc->aac_state &= ~AAC_STATE_SUSPEND;
610         AAC_UNMASK_INTERRUPTS(sc);
611         return(0);
612 }
613
614 /*
615  * Take an interrupt.
616  */
617 void
618 aac_intr(void *arg)
619 {
620         struct aac_softc *sc;
621         u_int16_t reason;
622         u_int32_t *resp_queue;
623
624         debug_called(2);
625
626         sc = (struct aac_softc *)arg;
627
628         /*
629          * Optimize the common case of adapter response interrupts.
630          * We must read from the card prior to processing the responses
631          * to ensure the clear is flushed prior to accessing the queues.
632          * Reading the queues from local memory might save us a PCI read.
633          */
634         resp_queue = sc->aac_queues->qt_qindex[AAC_HOST_NORM_RESP_QUEUE];
635         if (resp_queue[AAC_PRODUCER_INDEX] != resp_queue[AAC_CONSUMER_INDEX])
636                 reason = AAC_DB_RESPONSE_READY;
637         else 
638                 reason = AAC_GET_ISTATUS(sc);
639         AAC_CLEAR_ISTATUS(sc, reason);
640         (void)AAC_GET_ISTATUS(sc);
641
642         /* It's not ok to return here because of races with the previous step */
643         if (reason & AAC_DB_RESPONSE_READY)
644                 aac_host_response(sc);
645
646         /* controller wants to talk to the log */
647         if (reason & AAC_DB_PRINTF)
648                 aac_print_printf(sc);
649
650         /* controller has a message for us? */
651         if (reason & AAC_DB_COMMAND_READY) {
652                 /* XXX What happens if the thread is already awake? */
653                 if (sc->aifflags & AAC_AIFFLAGS_RUNNING) {
654                         sc->aifflags |= AAC_AIFFLAGS_PENDING;
655                         wakeup(sc->aifthread);
656                 }
657         }
658 }
659
660 /*
661  * Command Processing
662  */
663
664 /*
665  * Start as much queued I/O as possible on the controller
666  */
667 void
668 aac_startio(struct aac_softc *sc)
669 {
670         struct aac_command *cm;
671
672         debug_called(2);
673
674         for (;;) {
675                 /*
676                  * Try to get a command that's been put off for lack of 
677                  * resources
678                  */
679                 cm = aac_dequeue_ready(sc);
680
681                 /*
682                  * Try to build a command off the bio queue (ignore error 
683                  * return)
684                  */
685                 if (cm == NULL)
686                         aac_bio_command(sc, &cm);
687
688                 /* nothing to do? */
689                 if (cm == NULL)
690                         break;
691
692                 /* try to give the command to the controller */
693                 if (aac_start(cm) == EBUSY) {
694                         /* put it on the ready queue for later */
695                         aac_requeue_ready(cm);
696                         break;
697                 }
698         }
699 }
700
701 /*
702  * Deliver a command to the controller; allocate controller resources at the
703  * last moment when possible.
704  */
705 static int
706 aac_start(struct aac_command *cm)
707 {
708         struct aac_softc *sc;
709         int error;
710
711         debug_called(2);
712
713         sc = cm->cm_sc;
714
715         /* get the command mapped */
716         aac_map_command(cm);
717
718         /* fix up the address values in the FIB */
719         cm->cm_fib->Header.SenderFibAddress = (u_int32_t)cm->cm_fib;
720         cm->cm_fib->Header.ReceiverFibAddress = cm->cm_fibphys;
721
722         /* save a pointer to the command for speedy reverse-lookup */
723         cm->cm_fib->Header.SenderData = (u_int32_t)cm;  /* XXX 64-bit physical
724                                                          * address issue */
725         /* put the FIB on the outbound queue */
726         error = aac_enqueue_fib(sc, cm->cm_queue, cm);
727         return(error);
728 }
729
730 /*
731  * Handle notification of one or more FIBs coming from the controller.
732  */
733 static void
734 aac_host_command(struct aac_softc *sc)
735 {
736         struct aac_fib *fib;
737         u_int32_t fib_size;
738         int size;
739
740         debug_called(2);
741
742         sc->aifflags |= AAC_AIFFLAGS_RUNNING;
743
744         while (!(sc->aifflags & AAC_AIFFLAGS_EXIT)) {
745                 if (!(sc->aifflags & AAC_AIFFLAGS_PENDING))
746                         tsleep(sc->aifthread, 0, "aifthd", 15 * hz);
747
748                 sc->aifflags &= ~AAC_AIFFLAGS_PENDING;
749                 for (;;) {
750                         if (aac_dequeue_fib(sc, AAC_HOST_NORM_CMD_QUEUE,
751                                             &fib_size, &fib))
752                                 break;  /* nothing to do */
753         
754                         AAC_PRINT_FIB(sc, fib);
755         
756                         switch (fib->Header.Command) {
757                         case AifRequest:
758                                 aac_handle_aif(sc, fib);
759                                 break;
760                         default:
761                                 device_printf(sc->aac_dev, "unknown command "
762                                               "from controller\n");
763                                 break;
764                         }
765
766                         /* Return the AIF to the controller. */
767                         if ((fib->Header.XferState == 0) ||
768                             (fib->Header.StructType != AAC_FIBTYPE_TFIB))
769                                 break;
770
771                         if (fib->Header.XferState & AAC_FIBSTATE_FROMADAP) {
772                                 fib->Header.XferState |= AAC_FIBSTATE_DONEHOST;
773                                 *(AAC_FSAStatus*)fib->data = ST_OK;
774
775                                 /* XXX Compute the Size field? */
776                                 size = fib->Header.Size;
777                                 if (size > sizeof(struct aac_fib)) {
778                                         size = sizeof(struct aac_fib);
779                                         fib->Header.Size = size;
780                                 }
781                                 /*
782                                  * Since we did not generate this command, it
783                                  * cannot go through the normal
784                                  * enqueue->startio chain.
785                                  */
786                                 aac_enqueue_response(sc,
787                                                      AAC_ADAP_NORM_RESP_QUEUE,
788                                                      fib);
789                         }
790                 }
791         }
792         sc->aifflags &= ~AAC_AIFFLAGS_RUNNING;
793         wakeup(sc->aac_dev);
794
795 #if defined(__FreeBSD__) && __FreeBSD_version > 500005
796         mtx_lock(&Giant);
797 #endif
798         kthread_exit();
799 }
800
801 /*
802  * Handle notification of one or more FIBs completed by the controller
803  */
804 static void
805 aac_host_response(struct aac_softc *sc)
806 {
807         struct aac_command *cm;
808         struct aac_fib *fib;
809         u_int32_t fib_size;
810
811         debug_called(2);
812
813         for (;;) {
814                 /* look for completed FIBs on our queue */
815                 if (aac_dequeue_fib(sc, AAC_HOST_NORM_RESP_QUEUE, &fib_size,
816                                     &fib))
817                         break;  /* nothing to do */
818         
819                 /* get the command, unmap and queue for later processing */
820                 cm = (struct aac_command *)fib->Header.SenderData;
821                 if (cm == NULL) {
822                         AAC_PRINT_FIB(sc, fib);
823                 } else {
824                         aac_remove_busy(cm);
825                         aac_unmap_command(cm);          /* XXX defer? */
826                         aac_enqueue_complete(cm);
827                 }
828         }
829
830         /* handle completion processing */
831 #if defined(__FreeBSD__) && __FreeBSD_version >= 500005
832         taskqueue_enqueue(taskqueue_swi, &sc->aac_task_complete);
833 #else
834         aac_complete(sc, 0);
835 #endif
836 }
837
838 /*
839  * Process completed commands.
840  */
841 static void
842 aac_complete(void *context, int pending)
843 {
844         struct aac_softc *sc;
845         struct aac_command *cm;
846         
847         debug_called(2);
848
849         sc = (struct aac_softc *)context;
850
851         /* pull completed commands off the queue */
852         for (;;) {
853                 cm = aac_dequeue_complete(sc);
854                 if (cm == NULL)
855                         break;
856                 cm->cm_flags |= AAC_CMD_COMPLETED;
857
858                 /* is there a completion handler? */
859                 if (cm->cm_complete != NULL) {
860                         cm->cm_complete(cm);
861                 } else {
862                         /* assume that someone is sleeping on this command */
863                         wakeup(cm);
864                 }
865         }
866
867         /* see if we can start some more I/O */
868         aac_startio(sc);
869 }
870
871 /*
872  * Handle a bio submitted from a disk device.
873  */
874 void
875 aac_submit_bio(struct bio *bp)
876 {
877         struct aac_disk *ad;
878         struct aac_softc *sc;
879
880         debug_called(2);
881
882         ad = (struct aac_disk *)bp->bio_dev->si_drv1;
883         sc = ad->ad_controller;
884
885         /* queue the BIO and try to get some work done */
886         aac_enqueue_bio(sc, bp);
887         aac_startio(sc);
888 }
889
890 /*
891  * Get a bio and build a command to go with it.
892  */
893 static int
894 aac_bio_command(struct aac_softc *sc, struct aac_command **cmp)
895 {
896         struct aac_command *cm;
897         struct aac_fib *fib;
898         struct aac_blockread *br;
899         struct aac_blockwrite *bw;
900         struct aac_disk *ad;
901         struct bio *bp;
902
903         debug_called(2);
904
905         /* get the resources we will need */
906         cm = NULL;
907         if ((bp = aac_dequeue_bio(sc)) == NULL)
908                 goto fail;
909         if (aac_alloc_command(sc, &cm)) /* get a command */
910                 goto fail;
911
912         /* fill out the command */
913         cm->cm_data = (void *)bp->bio_data;
914         cm->cm_datalen = bp->bio_bcount;
915         cm->cm_complete = aac_bio_complete;
916         cm->cm_private = bp;
917         cm->cm_timestamp = time_second;
918         cm->cm_queue = AAC_ADAP_NORM_CMD_QUEUE;
919
920         /* build the FIB */
921         fib = cm->cm_fib;
922         fib->Header.XferState =  
923                 AAC_FIBSTATE_HOSTOWNED   | 
924                 AAC_FIBSTATE_INITIALISED | 
925                 AAC_FIBSTATE_EMPTY       | 
926                 AAC_FIBSTATE_FROMHOST    |
927                 AAC_FIBSTATE_REXPECTED   |
928                 AAC_FIBSTATE_NORM        |
929                 AAC_FIBSTATE_ASYNC       |
930                 AAC_FIBSTATE_FAST_RESPONSE;
931         fib->Header.Command = ContainerCommand;
932         fib->Header.Size = sizeof(struct aac_fib_header);
933
934         /* build the read/write request */
935         ad = (struct aac_disk *)bp->bio_dev->si_drv1;
936         if (BIO_IS_READ(bp)) {
937                 br = (struct aac_blockread *)&fib->data[0];
938                 br->Command = VM_CtBlockRead;
939                 br->ContainerId = ad->ad_container->co_mntobj.ObjectId;
940                 br->BlockNumber = bp->bio_pblkno;
941                 br->ByteCount = bp->bio_bcount;
942                 fib->Header.Size += sizeof(struct aac_blockread);
943                 cm->cm_sgtable = &br->SgMap;
944                 cm->cm_flags |= AAC_CMD_DATAIN;
945         } else {
946                 bw = (struct aac_blockwrite *)&fib->data[0];
947                 bw->Command = VM_CtBlockWrite;
948                 bw->ContainerId = ad->ad_container->co_mntobj.ObjectId;
949                 bw->BlockNumber = bp->bio_pblkno;
950                 bw->ByteCount = bp->bio_bcount;
951                 bw->Stable = CUNSTABLE; /* XXX what's appropriate here? */
952                 fib->Header.Size += sizeof(struct aac_blockwrite);
953                 cm->cm_flags |= AAC_CMD_DATAOUT;
954                 cm->cm_sgtable = &bw->SgMap;
955         }
956
957         *cmp = cm;
958         return(0);
959
960 fail:
961         if (bp != NULL)
962                 aac_enqueue_bio(sc, bp);
963         if (cm != NULL)
964                 aac_release_command(cm);
965         return(ENOMEM);
966 }
967
968 /*
969  * Handle a bio-instigated command that has been completed.
970  */
971 static void
972 aac_bio_complete(struct aac_command *cm)
973 {
974         struct aac_blockread_response *brr;
975         struct aac_blockwrite_response *bwr;
976         struct bio *bp;
977         AAC_FSAStatus status;
978
979         /* fetch relevant status and then release the command */
980         bp = (struct bio *)cm->cm_private;
981         if (BIO_IS_READ(bp)) {
982                 brr = (struct aac_blockread_response *)&cm->cm_fib->data[0];
983                 status = brr->Status;
984         } else {
985                 bwr = (struct aac_blockwrite_response *)&cm->cm_fib->data[0];
986                 status = bwr->Status;
987         }
988         aac_release_command(cm);
989
990         /* fix up the bio based on status */
991         if (status == ST_OK) {
992                 bp->bio_resid = 0;
993         } else {
994                 bp->bio_error = EIO;
995                 bp->bio_flags |= BIO_ERROR;
996                 /* pass an error string out to the disk layer */
997                 bp->bio_driver1 = aac_describe_code(aac_command_status_table,
998                                                     status);
999         }
1000         aac_biodone(bp);
1001 }
1002
1003 /*
1004  * Dump a block of data to the controller.  If the queue is full, tell the
1005  * caller to hold off and wait for the queue to drain.
1006  */
1007 int
1008 aac_dump_enqueue(struct aac_disk *ad, u_int32_t lba, void *data, int dumppages)
1009 {
1010         struct aac_softc *sc;
1011         struct aac_command *cm;
1012         struct aac_fib *fib;
1013         struct aac_blockwrite *bw;
1014
1015         sc = ad->ad_controller;
1016         cm = NULL;
1017
1018         if (aac_alloc_command(sc, &cm))
1019                 return (EBUSY);
1020
1021         /* fill out the command */
1022         cm->cm_data = data;
1023         cm->cm_datalen = dumppages * PAGE_SIZE;
1024         cm->cm_complete = NULL;
1025         cm->cm_private = NULL;
1026         cm->cm_timestamp = time_second;
1027         cm->cm_queue = AAC_ADAP_NORM_CMD_QUEUE;
1028
1029         /* build the FIB */
1030         fib = cm->cm_fib;
1031         fib->Header.XferState =  
1032         AAC_FIBSTATE_HOSTOWNED   | 
1033         AAC_FIBSTATE_INITIALISED | 
1034         AAC_FIBSTATE_FROMHOST    |
1035         AAC_FIBSTATE_REXPECTED   |
1036         AAC_FIBSTATE_NORM;
1037         fib->Header.Command = ContainerCommand;
1038         fib->Header.Size = sizeof(struct aac_fib_header);
1039
1040         bw = (struct aac_blockwrite *)&fib->data[0];
1041         bw->Command = VM_CtBlockWrite;
1042         bw->ContainerId = ad->ad_container->co_mntobj.ObjectId;
1043         bw->BlockNumber = lba;
1044         bw->ByteCount = dumppages * PAGE_SIZE;
1045         bw->Stable = CUNSTABLE;         /* XXX what's appropriate here? */
1046         fib->Header.Size += sizeof(struct aac_blockwrite);
1047         cm->cm_flags |= AAC_CMD_DATAOUT;
1048         cm->cm_sgtable = &bw->SgMap;
1049
1050         return (aac_start(cm));
1051 }
1052
1053 /*
1054  * Wait for the card's queue to drain when dumping.  Also check for monitor
1055  * printf's
1056  */
1057 void
1058 aac_dump_complete(struct aac_softc *sc)
1059 {
1060         struct aac_fib *fib;
1061         struct aac_command *cm;
1062         u_int16_t reason;
1063         u_int32_t pi, ci, fib_size;
1064
1065         do {
1066                 reason = AAC_GET_ISTATUS(sc);
1067                 if (reason & AAC_DB_RESPONSE_READY) {
1068                         AAC_CLEAR_ISTATUS(sc, AAC_DB_RESPONSE_READY);
1069                         for (;;) {
1070                                 if (aac_dequeue_fib(sc,
1071                                                     AAC_HOST_NORM_RESP_QUEUE,
1072                                                     &fib_size, &fib))
1073                                         break;
1074                                 cm = (struct aac_command *)
1075                                         fib->Header.SenderData;
1076                                 if (cm == NULL)
1077                                         AAC_PRINT_FIB(sc, fib);
1078                                 else {
1079                                         aac_remove_busy(cm);
1080                                         aac_unmap_command(cm);
1081                                         aac_enqueue_complete(cm);
1082                                         aac_release_command(cm);
1083                                 }
1084                         }
1085                 }
1086                 if (reason & AAC_DB_PRINTF) {
1087                         AAC_CLEAR_ISTATUS(sc, AAC_DB_PRINTF);
1088                         aac_print_printf(sc);
1089                 }
1090                 pi = sc->aac_queues->qt_qindex[AAC_ADAP_NORM_CMD_QUEUE][
1091                         AAC_PRODUCER_INDEX];
1092                 ci = sc->aac_queues->qt_qindex[AAC_ADAP_NORM_CMD_QUEUE][        
1093                         AAC_CONSUMER_INDEX];
1094         } while (ci != pi);
1095
1096         return;
1097 }
1098
1099 /*
1100  * Submit a command to the controller, return when it completes.
1101  * XXX This is very dangerous!  If the card has gone out to lunch, we could
1102  *     be stuck here forever.  At the same time, signals are not caught
1103  *     because there is a risk that a signal could wakeup the tsleep before
1104  *     the card has a chance to complete the command.  The passed in timeout
1105  *     is ignored for the same reason.  Since there is no way to cancel a
1106  *     command in progress, we should probably create a 'dead' queue where
1107  *     commands go that have been interrupted/timed-out/etc, that keeps them
1108  *     out of the free pool.  That way, if the card is just slow, it won't
1109  *     spam the memory of a command that has been recycled.
1110  */
1111 static int
1112 aac_wait_command(struct aac_command *cm, int timeout)
1113 {
1114         int s, error = 0;
1115
1116         debug_called(2);
1117
1118         /* Put the command on the ready queue and get things going */
1119         cm->cm_queue = AAC_ADAP_NORM_CMD_QUEUE;
1120         aac_enqueue_ready(cm);
1121         aac_startio(cm->cm_sc);
1122         s = splbio();
1123         while (!(cm->cm_flags & AAC_CMD_COMPLETED) && (error != EWOULDBLOCK)) {
1124                 error = tsleep(cm, 0, "aacwait", 0);
1125         }
1126         splx(s);
1127         return(error);
1128 }
1129
1130 /*
1131  *Command Buffer Management
1132  */
1133
1134 /*
1135  * Allocate a command.
1136  */
1137 int
1138 aac_alloc_command(struct aac_softc *sc, struct aac_command **cmp)
1139 {
1140         struct aac_command *cm;
1141
1142         debug_called(3);
1143
1144         if ((cm = aac_dequeue_free(sc)) == NULL)
1145                 return(ENOMEM);
1146
1147         *cmp = cm;
1148         return(0);
1149 }
1150
1151 /*
1152  * Release a command back to the freelist.
1153  */
1154 void
1155 aac_release_command(struct aac_command *cm)
1156 {
1157         debug_called(3);
1158
1159         /* (re)initialise the command/FIB */
1160         cm->cm_sgtable = NULL;
1161         cm->cm_flags = 0;
1162         cm->cm_complete = NULL;
1163         cm->cm_private = NULL;
1164         cm->cm_fib->Header.XferState = AAC_FIBSTATE_EMPTY;
1165         cm->cm_fib->Header.StructType = AAC_FIBTYPE_TFIB;
1166         cm->cm_fib->Header.Flags = 0;
1167         cm->cm_fib->Header.SenderSize = sizeof(struct aac_fib);
1168
1169         /* 
1170          * These are duplicated in aac_start to cover the case where an
1171          * intermediate stage may have destroyed them.  They're left
1172          * initialised here for debugging purposes only.
1173          */
1174         cm->cm_fib->Header.SenderFibAddress = (u_int32_t)cm->cm_fib;
1175         cm->cm_fib->Header.ReceiverFibAddress = (u_int32_t)cm->cm_fibphys;
1176         cm->cm_fib->Header.SenderData = 0;
1177
1178         aac_enqueue_free(cm);
1179 }
1180
1181 /*
1182  * Map helper for command/FIB allocation.
1183  */
1184 static void
1185 aac_map_command_helper(void *arg, bus_dma_segment_t *segs, int nseg, int error)
1186 {
1187         struct aac_softc *sc;
1188
1189         sc = (struct aac_softc *)arg;
1190
1191         debug_called(3);
1192
1193         sc->aac_fibphys = segs[0].ds_addr;
1194 }
1195
1196 /*
1197  * Allocate and initialise commands/FIBs for this adapter.
1198  */
1199 static int
1200 aac_alloc_commands(struct aac_softc *sc)
1201 {
1202         struct aac_command *cm;
1203         int i;
1204  
1205         debug_called(1);
1206
1207         /* allocate the FIBs in DMAable memory and load them */
1208         if (bus_dmamem_alloc(sc->aac_fib_dmat, (void **)&sc->aac_fibs,
1209                          BUS_DMA_NOWAIT, &sc->aac_fibmap)) {
1210                 return(ENOMEM);
1211         }
1212
1213         bus_dmamap_load(sc->aac_fib_dmat, sc->aac_fibmap, sc->aac_fibs, 
1214                         AAC_FIB_COUNT * sizeof(struct aac_fib),
1215                         aac_map_command_helper, sc, 0);
1216
1217         /* initialise constant fields in the command structure */
1218         bzero(sc->aac_fibs, AAC_FIB_COUNT * sizeof(struct aac_fib));
1219         for (i = 0; i < AAC_FIB_COUNT; i++) {
1220                 cm = &sc->aac_command[i];
1221                 cm->cm_sc = sc;
1222                 cm->cm_fib = sc->aac_fibs + i;
1223                 cm->cm_fibphys = sc->aac_fibphys + (i * sizeof(struct aac_fib));
1224
1225                 if (!bus_dmamap_create(sc->aac_buffer_dmat, 0, &cm->cm_datamap))
1226                         aac_release_command(cm);
1227         }
1228         return(0);
1229 }
1230
1231 /*
1232  * Free FIBs owned by this adapter.
1233  */
1234 static void
1235 aac_free_commands(struct aac_softc *sc)
1236 {
1237         int i;
1238
1239         debug_called(1);
1240
1241         for (i = 0; i < AAC_FIB_COUNT; i++)
1242                 bus_dmamap_destroy(sc->aac_buffer_dmat,
1243                                    sc->aac_command[i].cm_datamap);
1244
1245         bus_dmamap_unload(sc->aac_fib_dmat, sc->aac_fibmap);
1246         bus_dmamem_free(sc->aac_fib_dmat, sc->aac_fibs, sc->aac_fibmap);
1247 }
1248
1249 /*
1250  * Command-mapping helper function - populate this command's s/g table.
1251  */
1252 static void
1253 aac_map_command_sg(void *arg, bus_dma_segment_t *segs, int nseg, int error)
1254 {
1255         struct aac_command *cm;
1256         struct aac_fib *fib;
1257         struct aac_sg_table *sg;
1258         int i;
1259
1260         debug_called(3);
1261
1262         cm = (struct aac_command *)arg;
1263         fib = cm->cm_fib;
1264
1265         /* find the s/g table */
1266         sg = cm->cm_sgtable;
1267
1268         /* copy into the FIB */
1269         if (sg != NULL) {
1270                 sg->SgCount = nseg;
1271                 for (i = 0; i < nseg; i++) {
1272                         sg->SgEntry[i].SgAddress = segs[i].ds_addr;
1273                         sg->SgEntry[i].SgByteCount = segs[i].ds_len;
1274                 }
1275                 /* update the FIB size for the s/g count */
1276                 fib->Header.Size += nseg * sizeof(struct aac_sg_entry);
1277         }
1278
1279 }
1280
1281 /*
1282  * Map a command into controller-visible space.
1283  */
1284 static void
1285 aac_map_command(struct aac_command *cm)
1286 {
1287         struct aac_softc *sc;
1288
1289         debug_called(2);
1290
1291         sc = cm->cm_sc;
1292
1293         /* don't map more than once */
1294         if (cm->cm_flags & AAC_CMD_MAPPED)
1295                 return;
1296
1297         if (cm->cm_datalen != 0) {
1298                 bus_dmamap_load(sc->aac_buffer_dmat, cm->cm_datamap,
1299                                 cm->cm_data, cm->cm_datalen,
1300                                 aac_map_command_sg, cm, 0);
1301
1302                 if (cm->cm_flags & AAC_CMD_DATAIN)
1303                         bus_dmamap_sync(sc->aac_buffer_dmat, cm->cm_datamap,
1304                                         BUS_DMASYNC_PREREAD);
1305                 if (cm->cm_flags & AAC_CMD_DATAOUT)
1306                         bus_dmamap_sync(sc->aac_buffer_dmat, cm->cm_datamap,
1307                                         BUS_DMASYNC_PREWRITE);
1308         }
1309         cm->cm_flags |= AAC_CMD_MAPPED;
1310 }
1311
1312 /*
1313  * Unmap a command from controller-visible space.
1314  */
1315 static void
1316 aac_unmap_command(struct aac_command *cm)
1317 {
1318         struct aac_softc *sc;
1319
1320         debug_called(2);
1321
1322         sc = cm->cm_sc;
1323
1324         if (!(cm->cm_flags & AAC_CMD_MAPPED))
1325                 return;
1326
1327         if (cm->cm_datalen != 0) {
1328                 if (cm->cm_flags & AAC_CMD_DATAIN)
1329                         bus_dmamap_sync(sc->aac_buffer_dmat, cm->cm_datamap,
1330                                         BUS_DMASYNC_POSTREAD);
1331                 if (cm->cm_flags & AAC_CMD_DATAOUT)
1332                         bus_dmamap_sync(sc->aac_buffer_dmat, cm->cm_datamap,
1333                                         BUS_DMASYNC_POSTWRITE);
1334
1335                 bus_dmamap_unload(sc->aac_buffer_dmat, cm->cm_datamap);
1336         }
1337         cm->cm_flags &= ~AAC_CMD_MAPPED;
1338 }
1339
1340 /*
1341  * Hardware Interface
1342  */
1343
1344 /*
1345  * Initialise the adapter.
1346  */
1347 static void
1348 aac_common_map(void *arg, bus_dma_segment_t *segs, int nseg, int error)
1349 {
1350         struct aac_softc *sc;
1351
1352         debug_called(1);
1353
1354         sc = (struct aac_softc *)arg;
1355
1356         sc->aac_common_busaddr = segs[0].ds_addr;
1357 }
1358
1359 static int
1360 aac_check_firmware(struct aac_softc *sc)
1361 {
1362         u_int32_t major, minor, options;
1363
1364         debug_called(1);
1365
1366         /*
1367          * Retrieve the firmware version numbers.  Dell PERC2/QC cards with
1368          * firmware version 1.x are not compatible with this driver.
1369          */
1370         if (sc->flags & AAC_FLAGS_PERC2QC) {
1371                 if (aac_sync_command(sc, AAC_MONKER_GETKERNVER, 0, 0, 0, 0,
1372                                      NULL)) {
1373                         device_printf(sc->aac_dev,
1374                                       "Error reading firmware version\n");
1375                         return (EIO);
1376                 }
1377
1378                 /* These numbers are stored as ASCII! */
1379                 major = (AAC_GET_MAILBOX(sc, 1) & 0xff) - 0x30;
1380                 minor = (AAC_GET_MAILBOX(sc, 2) & 0xff) - 0x30;
1381                 if (major == 1) {
1382                         device_printf(sc->aac_dev,
1383                             "Firmware version %d.%d is not supported.\n",
1384                             major, minor);
1385                         return (EINVAL);
1386                 }
1387         }
1388
1389         /*
1390          * Retrieve the capabilities/supported options word so we know what
1391          * work-arounds to enable.
1392          */
1393         if (aac_sync_command(sc, AAC_MONKER_GETINFO, 0, 0, 0, 0, NULL)) {
1394                 device_printf(sc->aac_dev, "RequestAdapterInfo failed\n");
1395                 return (EIO);
1396         }
1397         options = AAC_GET_MAILBOX(sc, 1);
1398         sc->supported_options = options;
1399
1400         if ((options & AAC_SUPPORTED_4GB_WINDOW) != 0 &&
1401             (sc->flags & AAC_FLAGS_NO4GB) == 0)
1402                 sc->flags |= AAC_FLAGS_4GB_WINDOW;
1403         if (options & AAC_SUPPORTED_NONDASD)
1404                 sc->flags |= AAC_FLAGS_ENABLE_CAM;
1405
1406         return (0);
1407 }
1408
1409 static int
1410 aac_init(struct aac_softc *sc)
1411 {
1412         struct aac_adapter_init *ip;
1413         time_t then;
1414         u_int32_t code;
1415         u_int8_t *qaddr;
1416         int error;
1417
1418         debug_called(1);
1419
1420         /*
1421          * First wait for the adapter to come ready.
1422          */
1423         then = time_second;
1424         do {
1425                 code = AAC_GET_FWSTATUS(sc);
1426                 if (code & AAC_SELF_TEST_FAILED) {
1427                         device_printf(sc->aac_dev, "FATAL: selftest failed\n");
1428                         return(ENXIO);
1429                 }
1430                 if (code & AAC_KERNEL_PANIC) {
1431                         device_printf(sc->aac_dev,
1432                                       "FATAL: controller kernel panic\n");
1433                         return(ENXIO);
1434                 }
1435                 if (time_second > (then + AAC_BOOT_TIMEOUT)) {
1436                         device_printf(sc->aac_dev,
1437                                       "FATAL: controller not coming ready, "
1438                                            "status %x\n", code);
1439                         return(ENXIO);
1440                 }
1441         } while (!(code & AAC_UP_AND_RUNNING));
1442
1443         error = ENOMEM;
1444         /*
1445          * Create DMA tag for mapping buffers into controller-addressable space.
1446          */
1447         if (bus_dma_tag_create(sc->aac_parent_dmat,     /* parent */
1448                                1, 0,                    /* algnmnt, boundary */
1449                                BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
1450                                BUS_SPACE_MAXADDR,       /* highaddr */
1451                                NULL, NULL,              /* filter, filterarg */
1452                                MAXBSIZE,                /* maxsize */
1453                                AAC_MAXSGENTRIES,        /* nsegments */
1454                                MAXBSIZE,                /* maxsegsize */
1455                                BUS_DMA_ALLOCNOW,        /* flags */
1456                                &sc->aac_buffer_dmat)) {
1457                 device_printf(sc->aac_dev, "can't allocate buffer DMA tag\n");
1458                 goto out;
1459         }
1460  
1461         /*
1462          * Create DMA tag for mapping FIBs into controller-addressable space..
1463          */
1464         if (bus_dma_tag_create(sc->aac_parent_dmat,     /* parent */
1465                                1, 0,                    /* algnmnt, boundary */
1466                                (sc->flags & AAC_FLAGS_4GB_WINDOW) ?
1467                                BUS_SPACE_MAXADDR_32BIT :
1468                                0x7fffffff,              /* lowaddr */
1469                                BUS_SPACE_MAXADDR,       /* highaddr */
1470                                NULL, NULL,              /* filter, filterarg */
1471                                AAC_FIB_COUNT *
1472                                sizeof(struct aac_fib),  /* maxsize */
1473                                1,                       /* nsegments */
1474                                AAC_FIB_COUNT *
1475                                sizeof(struct aac_fib),  /* maxsegsize */
1476                                BUS_DMA_ALLOCNOW,        /* flags */
1477                                &sc->aac_fib_dmat)) {
1478                 device_printf(sc->aac_dev, "can't allocate FIB DMA tag\n");;
1479                 goto out;
1480         }
1481  
1482         /*
1483          * Create DMA tag for the common structure and allocate it.
1484          */
1485         if (bus_dma_tag_create(sc->aac_parent_dmat,     /* parent */
1486                                1, 0,                    /* algnmnt, boundary */
1487                                (sc->flags & AAC_FLAGS_4GB_WINDOW) ?
1488                                BUS_SPACE_MAXADDR_32BIT :
1489                                0x7fffffff,              /* lowaddr */
1490                                BUS_SPACE_MAXADDR,       /* highaddr */
1491                                NULL, NULL,              /* filter, filterarg */
1492                                8192 + sizeof(struct aac_common), /* maxsize */
1493                                1,                       /* nsegments */
1494                                BUS_SPACE_MAXSIZE_32BIT, /* maxsegsize */
1495                                BUS_DMA_ALLOCNOW,        /* flags */
1496                                &sc->aac_common_dmat)) {
1497                 device_printf(sc->aac_dev,
1498                               "can't allocate common structure DMA tag\n");
1499                 goto out;
1500         }
1501         if (bus_dmamem_alloc(sc->aac_common_dmat, (void **)&sc->aac_common,
1502                              BUS_DMA_NOWAIT, &sc->aac_common_dmamap)) {
1503                 device_printf(sc->aac_dev, "can't allocate common structure\n");
1504                 goto out;
1505         }
1506         /*
1507          * Work around a bug in the 2120 and 2200 that cannot DMA commands
1508          * below address 8192 in physical memory.
1509          * XXX If the padding is not needed, can it be put to use instead
1510          * of ignored?
1511          */
1512         bus_dmamap_load(sc->aac_common_dmat, sc->aac_common_dmamap,
1513                         sc->aac_common, 8192 + sizeof(*sc->aac_common),
1514                         aac_common_map, sc, 0);
1515
1516         if (sc->aac_common_busaddr < 8192) {
1517                 (uint8_t *)sc->aac_common += 8192;
1518                 sc->aac_common_busaddr += 8192;
1519         }
1520         bzero(sc->aac_common, sizeof(*sc->aac_common));
1521
1522         /* Allocate some FIBs and associated command structs */
1523         if (aac_alloc_commands(sc) != 0)
1524                 goto out;
1525
1526         /*
1527          * Fill in the init structure.  This tells the adapter about the
1528          * physical location of various important shared data structures.
1529          */
1530         ip = &sc->aac_common->ac_init;
1531         ip->InitStructRevision = AAC_INIT_STRUCT_REVISION;
1532         ip->MiniPortRevision = AAC_INIT_STRUCT_MINIPORT_REVISION;
1533
1534         ip->AdapterFibsPhysicalAddress = sc->aac_common_busaddr +
1535                                          offsetof(struct aac_common, ac_fibs);
1536         ip->AdapterFibsVirtualAddress = (aac_phys_addr_t)&sc->aac_common->ac_fibs[0];
1537         ip->AdapterFibsSize = AAC_ADAPTER_FIBS * sizeof(struct aac_fib);
1538         ip->AdapterFibAlign = sizeof(struct aac_fib);
1539
1540         ip->PrintfBufferAddress = sc->aac_common_busaddr +
1541                                   offsetof(struct aac_common, ac_printf);
1542         ip->PrintfBufferSize = AAC_PRINTF_BUFSIZE;
1543
1544         /* The adapter assumes that pages are 4K in size */
1545         ip->HostPhysMemPages = ctob(physmem) / AAC_PAGE_SIZE;
1546         ip->HostElapsedSeconds = time_second;   /* reset later if invalid */
1547
1548         /*
1549          * Initialise FIB queues.  Note that it appears that the layout of the
1550          * indexes and the segmentation of the entries may be mandated by the
1551          * adapter, which is only told about the base of the queue index fields.
1552          *
1553          * The initial values of the indices are assumed to inform the adapter
1554          * of the sizes of the respective queues, and theoretically it could 
1555          * work out the entire layout of the queue structures from this.  We
1556          * take the easy route and just lay this area out like everyone else
1557          * does.
1558          *
1559          * The Linux driver uses a much more complex scheme whereby several 
1560          * header records are kept for each queue.  We use a couple of generic 
1561          * list manipulation functions which 'know' the size of each list by
1562          * virtue of a table.
1563          */
1564         qaddr = &sc->aac_common->ac_qbuf[0] + AAC_QUEUE_ALIGN;
1565         qaddr -= (u_int32_t)qaddr % AAC_QUEUE_ALIGN;
1566         sc->aac_queues = (struct aac_queue_table *)qaddr;
1567         ip->CommHeaderAddress = sc->aac_common_busaddr +
1568                                 ((u_int32_t)sc->aac_queues -
1569                                 (u_int32_t)sc->aac_common);
1570         bzero(sc->aac_queues, sizeof(struct aac_queue_table));
1571
1572         sc->aac_queues->qt_qindex[AAC_HOST_NORM_CMD_QUEUE][AAC_PRODUCER_INDEX] =
1573                 AAC_HOST_NORM_CMD_ENTRIES;
1574         sc->aac_queues->qt_qindex[AAC_HOST_NORM_CMD_QUEUE][AAC_CONSUMER_INDEX] =
1575                 AAC_HOST_NORM_CMD_ENTRIES;
1576         sc->aac_queues->qt_qindex[AAC_HOST_HIGH_CMD_QUEUE][AAC_PRODUCER_INDEX] =
1577                 AAC_HOST_HIGH_CMD_ENTRIES;
1578         sc->aac_queues->qt_qindex[AAC_HOST_HIGH_CMD_QUEUE][AAC_CONSUMER_INDEX] =
1579                 AAC_HOST_HIGH_CMD_ENTRIES;
1580         sc->aac_queues->qt_qindex[AAC_ADAP_NORM_CMD_QUEUE][AAC_PRODUCER_INDEX] =
1581                 AAC_ADAP_NORM_CMD_ENTRIES;
1582         sc->aac_queues->qt_qindex[AAC_ADAP_NORM_CMD_QUEUE][AAC_CONSUMER_INDEX] =
1583                 AAC_ADAP_NORM_CMD_ENTRIES;
1584         sc->aac_queues->qt_qindex[AAC_ADAP_HIGH_CMD_QUEUE][AAC_PRODUCER_INDEX] =
1585                 AAC_ADAP_HIGH_CMD_ENTRIES;
1586         sc->aac_queues->qt_qindex[AAC_ADAP_HIGH_CMD_QUEUE][AAC_CONSUMER_INDEX] =
1587                 AAC_ADAP_HIGH_CMD_ENTRIES;
1588         sc->aac_queues->qt_qindex[AAC_HOST_NORM_RESP_QUEUE][AAC_PRODUCER_INDEX]=
1589                 AAC_HOST_NORM_RESP_ENTRIES;
1590         sc->aac_queues->qt_qindex[AAC_HOST_NORM_RESP_QUEUE][AAC_CONSUMER_INDEX]=
1591                 AAC_HOST_NORM_RESP_ENTRIES;
1592         sc->aac_queues->qt_qindex[AAC_HOST_HIGH_RESP_QUEUE][AAC_PRODUCER_INDEX]=
1593                 AAC_HOST_HIGH_RESP_ENTRIES;
1594         sc->aac_queues->qt_qindex[AAC_HOST_HIGH_RESP_QUEUE][AAC_CONSUMER_INDEX]=
1595                 AAC_HOST_HIGH_RESP_ENTRIES;
1596         sc->aac_queues->qt_qindex[AAC_ADAP_NORM_RESP_QUEUE][AAC_PRODUCER_INDEX]=
1597                 AAC_ADAP_NORM_RESP_ENTRIES;
1598         sc->aac_queues->qt_qindex[AAC_ADAP_NORM_RESP_QUEUE][AAC_CONSUMER_INDEX]=
1599                 AAC_ADAP_NORM_RESP_ENTRIES;
1600         sc->aac_queues->qt_qindex[AAC_ADAP_HIGH_RESP_QUEUE][AAC_PRODUCER_INDEX]=
1601                 AAC_ADAP_HIGH_RESP_ENTRIES;
1602         sc->aac_queues->qt_qindex[AAC_ADAP_HIGH_RESP_QUEUE][AAC_CONSUMER_INDEX]=
1603                 AAC_ADAP_HIGH_RESP_ENTRIES;
1604         sc->aac_qentries[AAC_HOST_NORM_CMD_QUEUE] =
1605                 &sc->aac_queues->qt_HostNormCmdQueue[0];
1606         sc->aac_qentries[AAC_HOST_HIGH_CMD_QUEUE] =
1607                 &sc->aac_queues->qt_HostHighCmdQueue[0];
1608         sc->aac_qentries[AAC_ADAP_NORM_CMD_QUEUE] =
1609                 &sc->aac_queues->qt_AdapNormCmdQueue[0];
1610         sc->aac_qentries[AAC_ADAP_HIGH_CMD_QUEUE] =
1611                 &sc->aac_queues->qt_AdapHighCmdQueue[0];
1612         sc->aac_qentries[AAC_HOST_NORM_RESP_QUEUE] =
1613                 &sc->aac_queues->qt_HostNormRespQueue[0];
1614         sc->aac_qentries[AAC_HOST_HIGH_RESP_QUEUE] =
1615                 &sc->aac_queues->qt_HostHighRespQueue[0];
1616         sc->aac_qentries[AAC_ADAP_NORM_RESP_QUEUE] =
1617                 &sc->aac_queues->qt_AdapNormRespQueue[0];
1618         sc->aac_qentries[AAC_ADAP_HIGH_RESP_QUEUE] =
1619                 &sc->aac_queues->qt_AdapHighRespQueue[0];
1620
1621         /*
1622          * Do controller-type-specific initialisation
1623          */
1624         switch (sc->aac_hwif) {
1625         case AAC_HWIF_I960RX:
1626                 AAC_SETREG4(sc, AAC_RX_ODBR, ~0);
1627                 break;
1628         }
1629
1630         /*
1631          * Give the init structure to the controller.
1632          */
1633         if (aac_sync_command(sc, AAC_MONKER_INITSTRUCT, 
1634                              sc->aac_common_busaddr +
1635                              offsetof(struct aac_common, ac_init), 0, 0, 0,
1636                              NULL)) {
1637                 device_printf(sc->aac_dev,
1638                               "error establishing init structure\n");
1639                 error = EIO;
1640                 goto out;
1641         }
1642
1643         error = 0;
1644 out:
1645         return(error);
1646 }
1647
1648 /*
1649  * Send a synchronous command to the controller and wait for a result.
1650  */
1651 static int
1652 aac_sync_command(struct aac_softc *sc, u_int32_t command,
1653                  u_int32_t arg0, u_int32_t arg1, u_int32_t arg2, u_int32_t arg3,
1654                  u_int32_t *sp)
1655 {
1656         time_t then;
1657         u_int32_t status;
1658
1659         debug_called(3);
1660
1661         /* populate the mailbox */
1662         AAC_SET_MAILBOX(sc, command, arg0, arg1, arg2, arg3);
1663
1664         /* ensure the sync command doorbell flag is cleared */
1665         AAC_CLEAR_ISTATUS(sc, AAC_DB_SYNC_COMMAND);
1666
1667         /* then set it to signal the adapter */
1668         AAC_QNOTIFY(sc, AAC_DB_SYNC_COMMAND);
1669
1670         /* spin waiting for the command to complete */
1671         then = time_second;
1672         do {
1673                 if (time_second > (then + AAC_IMMEDIATE_TIMEOUT)) {
1674                         debug(1, "timed out");
1675                         return(EIO);
1676                 }
1677         } while (!(AAC_GET_ISTATUS(sc) & AAC_DB_SYNC_COMMAND));
1678
1679         /* clear the completion flag */
1680         AAC_CLEAR_ISTATUS(sc, AAC_DB_SYNC_COMMAND);
1681
1682         /* get the command status */
1683         status = AAC_GET_MAILBOX(sc, 0);
1684         if (sp != NULL)
1685                 *sp = status;
1686         return(0);
1687 }
1688
1689 /*
1690  * Grab the sync fib area.
1691  */
1692 int
1693 aac_alloc_sync_fib(struct aac_softc *sc, struct aac_fib **fib, int flags)
1694 {
1695
1696         /*
1697          * If the force flag is set, the system is shutting down, or in
1698          * trouble.  Ignore the mutex.
1699          */
1700         if (!(flags & AAC_SYNC_LOCK_FORCE))
1701                 AAC_LOCK_ACQUIRE(&sc->aac_sync_lock);
1702
1703         *fib = &sc->aac_common->ac_sync_fib;
1704
1705         return (1);
1706 }
1707
1708 /*
1709  * Release the sync fib area.
1710  */
1711 void
1712 aac_release_sync_fib(struct aac_softc *sc)
1713 {
1714
1715         AAC_LOCK_RELEASE(&sc->aac_sync_lock);
1716 }
1717
1718 /*
1719  * Send a synchronous FIB to the controller and wait for a result.
1720  */
1721 int
1722 aac_sync_fib(struct aac_softc *sc, u_int32_t command, u_int32_t xferstate, 
1723                  struct aac_fib *fib, u_int16_t datasize)
1724 {
1725         debug_called(3);
1726
1727         if (datasize > AAC_FIB_DATASIZE)
1728                 return(EINVAL);
1729
1730         /*
1731          * Set up the sync FIB
1732          */
1733         fib->Header.XferState = AAC_FIBSTATE_HOSTOWNED |
1734                                 AAC_FIBSTATE_INITIALISED |
1735                                 AAC_FIBSTATE_EMPTY;
1736         fib->Header.XferState |= xferstate;
1737         fib->Header.Command = command;
1738         fib->Header.StructType = AAC_FIBTYPE_TFIB;
1739         fib->Header.Size = sizeof(struct aac_fib) + datasize;
1740         fib->Header.SenderSize = sizeof(struct aac_fib);
1741         fib->Header.SenderFibAddress = (u_int32_t)fib;
1742         fib->Header.ReceiverFibAddress = sc->aac_common_busaddr +
1743                                          offsetof(struct aac_common,
1744                                                   ac_sync_fib);
1745
1746         /*
1747          * Give the FIB to the controller, wait for a response.
1748          */
1749         if (aac_sync_command(sc, AAC_MONKER_SYNCFIB,
1750                              fib->Header.ReceiverFibAddress, 0, 0, 0, NULL)) {
1751                 debug(2, "IO error");
1752                 return(EIO);
1753         }
1754
1755         return (0);
1756 }
1757
1758 /*
1759  * Adapter-space FIB queue manipulation
1760  *
1761  * Note that the queue implementation here is a little funky; neither the PI or
1762  * CI will ever be zero.  This behaviour is a controller feature.
1763  */
1764 static struct {
1765         int             size;
1766         int             notify;
1767 } aac_qinfo[] = {
1768         {AAC_HOST_NORM_CMD_ENTRIES, AAC_DB_COMMAND_NOT_FULL},
1769         {AAC_HOST_HIGH_CMD_ENTRIES, 0},
1770         {AAC_ADAP_NORM_CMD_ENTRIES, AAC_DB_COMMAND_READY},
1771         {AAC_ADAP_HIGH_CMD_ENTRIES, 0},
1772         {AAC_HOST_NORM_RESP_ENTRIES, AAC_DB_RESPONSE_NOT_FULL},
1773         {AAC_HOST_HIGH_RESP_ENTRIES, 0},
1774         {AAC_ADAP_NORM_RESP_ENTRIES, AAC_DB_RESPONSE_READY},
1775         {AAC_ADAP_HIGH_RESP_ENTRIES, 0}
1776 };
1777
1778 /*
1779  * Atomically insert an entry into the nominated queue, returns 0 on success or
1780  * EBUSY if the queue is full.
1781  *
1782  * Note: it would be more efficient to defer notifying the controller in
1783  *       the case where we may be inserting several entries in rapid succession,
1784  *       but implementing this usefully may be difficult (it would involve a
1785  *       separate queue/notify interface).
1786  */
1787 static int
1788 aac_enqueue_fib(struct aac_softc *sc, int queue, struct aac_command *cm)
1789 {
1790         u_int32_t pi, ci;
1791         int s, error;
1792         u_int32_t fib_size;
1793         u_int32_t fib_addr;
1794
1795         debug_called(3);
1796
1797         fib_size = cm->cm_fib->Header.Size; 
1798         fib_addr = cm->cm_fib->Header.ReceiverFibAddress;
1799
1800         s = splbio();
1801
1802         /* get the producer/consumer indices */
1803         pi = sc->aac_queues->qt_qindex[queue][AAC_PRODUCER_INDEX];
1804         ci = sc->aac_queues->qt_qindex[queue][AAC_CONSUMER_INDEX];
1805
1806         /* wrap the queue? */
1807         if (pi >= aac_qinfo[queue].size)
1808                 pi = 0;
1809
1810         /* check for queue full */
1811         if ((pi + 1) == ci) {
1812                 error = EBUSY;
1813                 goto out;
1814         }
1815
1816         /* populate queue entry */
1817         (sc->aac_qentries[queue] + pi)->aq_fib_size = fib_size;
1818         (sc->aac_qentries[queue] + pi)->aq_fib_addr = fib_addr;
1819
1820         /* update producer index */
1821         sc->aac_queues->qt_qindex[queue][AAC_PRODUCER_INDEX] = pi + 1;
1822
1823         /*
1824          * To avoid a race with its completion interrupt, place this command on
1825          * the busy queue prior to advertising it to the controller.
1826          */
1827         aac_enqueue_busy(cm);
1828
1829         /* notify the adapter if we know how */
1830         if (aac_qinfo[queue].notify != 0)
1831                 AAC_QNOTIFY(sc, aac_qinfo[queue].notify);
1832
1833         error = 0;
1834
1835 out:
1836         splx(s);
1837         return(error);
1838 }
1839
1840 /*
1841  * Atomically remove one entry from the nominated queue, returns 0 on
1842  * success or ENOENT if the queue is empty.
1843  */
1844 static int
1845 aac_dequeue_fib(struct aac_softc *sc, int queue, u_int32_t *fib_size,
1846                 struct aac_fib **fib_addr)
1847 {
1848         u_int32_t pi, ci;
1849         int s, error;
1850         int notify;
1851
1852         debug_called(3);
1853
1854         s = splbio();
1855
1856         /* get the producer/consumer indices */
1857         pi = sc->aac_queues->qt_qindex[queue][AAC_PRODUCER_INDEX];
1858         ci = sc->aac_queues->qt_qindex[queue][AAC_CONSUMER_INDEX];
1859
1860         /* check for queue empty */
1861         if (ci == pi) {
1862                 error = ENOENT;
1863                 goto out;
1864         }
1865         
1866         notify = 0;
1867         if (ci == pi + 1)
1868                 notify++;
1869
1870         /* wrap the queue? */
1871         if (ci >= aac_qinfo[queue].size)
1872                 ci = 0;
1873
1874         /* fetch the entry */
1875         *fib_size = (sc->aac_qentries[queue] + ci)->aq_fib_size;
1876         *fib_addr = (struct aac_fib *)(sc->aac_qentries[queue] +
1877                                        ci)->aq_fib_addr;
1878
1879         /*
1880          * Is this a fast response? If it is, update the fib fields in
1881          * local memory so the whole fib doesn't have to be DMA'd back up.
1882          */
1883         if (*(uintptr_t *)fib_addr & 0x01) {
1884                 *(uintptr_t *)fib_addr &= ~0x01;
1885                 (*fib_addr)->Header.XferState |= AAC_FIBSTATE_DONEADAP;
1886                 *((u_int32_t*)((*fib_addr)->data)) = AAC_ERROR_NORMAL;
1887         }
1888         /* update consumer index */
1889         sc->aac_queues->qt_qindex[queue][AAC_CONSUMER_INDEX] = ci + 1;
1890
1891         /* if we have made the queue un-full, notify the adapter */
1892         if (notify && (aac_qinfo[queue].notify != 0))
1893                 AAC_QNOTIFY(sc, aac_qinfo[queue].notify);
1894         error = 0;
1895
1896 out:
1897         splx(s);
1898         return(error);
1899 }
1900
1901 /*
1902  * Put our response to an Adapter Initialed Fib on the response queue
1903  */
1904 static int
1905 aac_enqueue_response(struct aac_softc *sc, int queue, struct aac_fib *fib)
1906 {
1907         u_int32_t pi, ci;
1908         int s, error;
1909         u_int32_t fib_size;
1910         u_int32_t fib_addr;
1911
1912         debug_called(1);
1913
1914         /* Tell the adapter where the FIB is */
1915         fib_size = fib->Header.Size; 
1916         fib_addr = fib->Header.SenderFibAddress;
1917         fib->Header.ReceiverFibAddress = fib_addr;
1918
1919         s = splbio();
1920
1921         /* get the producer/consumer indices */
1922         pi = sc->aac_queues->qt_qindex[queue][AAC_PRODUCER_INDEX];
1923         ci = sc->aac_queues->qt_qindex[queue][AAC_CONSUMER_INDEX];
1924
1925         /* wrap the queue? */
1926         if (pi >= aac_qinfo[queue].size)
1927                 pi = 0;
1928
1929         /* check for queue full */
1930         if ((pi + 1) == ci) {
1931                 error = EBUSY;
1932                 goto out;
1933         }
1934
1935         /* populate queue entry */
1936         (sc->aac_qentries[queue] + pi)->aq_fib_size = fib_size;
1937         (sc->aac_qentries[queue] + pi)->aq_fib_addr = fib_addr;
1938
1939         /* update producer index */
1940         sc->aac_queues->qt_qindex[queue][AAC_PRODUCER_INDEX] = pi + 1;
1941
1942         /* notify the adapter if we know how */
1943         if (aac_qinfo[queue].notify != 0)
1944                 AAC_QNOTIFY(sc, aac_qinfo[queue].notify);
1945
1946         error = 0;
1947
1948 out:
1949         splx(s);
1950         return(error);
1951 }
1952
1953 /*
1954  * Check for commands that have been outstanding for a suspiciously long time,
1955  * and complain about them.
1956  */
1957 static void
1958 aac_timeout(struct aac_softc *sc)
1959 {
1960         int s;
1961         struct aac_command *cm;
1962         time_t deadline;
1963
1964 #if 0
1965         /* simulate an interrupt to handle possibly-missed interrupts */
1966         /*
1967          * XXX This was done to work around another bug which has since been
1968          * fixed.  It is dangerous anyways because you don't want multiple
1969          * threads in the interrupt handler at the same time!  If calling
1970          * is deamed neccesary in the future, proper mutexes must be used.
1971          */
1972         s = splbio();
1973         aac_intr(sc);
1974         splx(s);
1975
1976         /* kick the I/O queue to restart it in the case of deadlock */
1977         aac_startio(sc);
1978 #endif
1979
1980         /*
1981          * traverse the busy command list, bitch about late commands once
1982          * only.
1983          */
1984         deadline = time_second - AAC_CMD_TIMEOUT;
1985         s = splbio();
1986         TAILQ_FOREACH(cm, &sc->aac_busy, cm_link) {
1987                 if ((cm->cm_timestamp  < deadline)
1988                         /* && !(cm->cm_flags & AAC_CMD_TIMEDOUT) */) {
1989                         cm->cm_flags |= AAC_CMD_TIMEDOUT;
1990                         device_printf(sc->aac_dev,
1991                                       "COMMAND %p TIMEOUT AFTER %d SECONDS\n",
1992                                       cm, (int)(time_second-cm->cm_timestamp));
1993                         AAC_PRINT_FIB(sc, cm->cm_fib);
1994                 }
1995         }
1996         splx(s);
1997
1998         /* reset the timer for next time */
1999         timeout((timeout_t*)aac_timeout, sc, AAC_PERIODIC_INTERVAL * hz);
2000         return;
2001 }
2002
2003 /*
2004  * Interface Function Vectors
2005  */
2006
2007 /*
2008  * Read the current firmware status word.
2009  */
2010 static int
2011 aac_sa_get_fwstatus(struct aac_softc *sc)
2012 {
2013         debug_called(3);
2014
2015         return(AAC_GETREG4(sc, AAC_SA_FWSTATUS));
2016 }
2017
2018 static int
2019 aac_rx_get_fwstatus(struct aac_softc *sc)
2020 {
2021         debug_called(3);
2022
2023         return(AAC_GETREG4(sc, AAC_RX_FWSTATUS));
2024 }
2025
2026 static int
2027 aac_fa_get_fwstatus(struct aac_softc *sc)
2028 {
2029         int val;
2030
2031         debug_called(3);
2032
2033         val = AAC_GETREG4(sc, AAC_FA_FWSTATUS);
2034         return (val);
2035 }
2036
2037 /*
2038  * Notify the controller of a change in a given queue
2039  */
2040
2041 static void
2042 aac_sa_qnotify(struct aac_softc *sc, int qbit)
2043 {
2044         debug_called(3);
2045
2046         AAC_SETREG2(sc, AAC_SA_DOORBELL1_SET, qbit);
2047 }
2048
2049 static void
2050 aac_rx_qnotify(struct aac_softc *sc, int qbit)
2051 {
2052         debug_called(3);
2053
2054         AAC_SETREG4(sc, AAC_RX_IDBR, qbit);
2055 }
2056
2057 static void
2058 aac_fa_qnotify(struct aac_softc *sc, int qbit)
2059 {
2060         debug_called(3);
2061
2062         AAC_SETREG2(sc, AAC_FA_DOORBELL1, qbit);
2063         AAC_FA_HACK(sc);
2064 }
2065
2066 /*
2067  * Get the interrupt reason bits
2068  */
2069 static int
2070 aac_sa_get_istatus(struct aac_softc *sc)
2071 {
2072         debug_called(3);
2073
2074         return(AAC_GETREG2(sc, AAC_SA_DOORBELL0));
2075 }
2076
2077 static int
2078 aac_rx_get_istatus(struct aac_softc *sc)
2079 {
2080         debug_called(3);
2081
2082         return(AAC_GETREG4(sc, AAC_RX_ODBR));
2083 }
2084
2085 static int
2086 aac_fa_get_istatus(struct aac_softc *sc)
2087 {
2088         int val;
2089
2090         debug_called(3);
2091
2092         val = AAC_GETREG2(sc, AAC_FA_DOORBELL0);
2093         return (val);
2094 }
2095
2096 /*
2097  * Clear some interrupt reason bits
2098  */
2099 static void
2100 aac_sa_clear_istatus(struct aac_softc *sc, int mask)
2101 {
2102         debug_called(3);
2103
2104         AAC_SETREG2(sc, AAC_SA_DOORBELL0_CLEAR, mask);
2105 }
2106
2107 static void
2108 aac_rx_clear_istatus(struct aac_softc *sc, int mask)
2109 {
2110         debug_called(3);
2111
2112         AAC_SETREG4(sc, AAC_RX_ODBR, mask);
2113 }
2114
2115 static void
2116 aac_fa_clear_istatus(struct aac_softc *sc, int mask)
2117 {
2118         debug_called(3);
2119
2120         AAC_SETREG2(sc, AAC_FA_DOORBELL0_CLEAR, mask);
2121         AAC_FA_HACK(sc);
2122 }
2123
2124 /*
2125  * Populate the mailbox and set the command word
2126  */
2127 static void
2128 aac_sa_set_mailbox(struct aac_softc *sc, u_int32_t command,
2129                 u_int32_t arg0, u_int32_t arg1, u_int32_t arg2, u_int32_t arg3)
2130 {
2131         debug_called(4);
2132
2133         AAC_SETREG4(sc, AAC_SA_MAILBOX, command);
2134         AAC_SETREG4(sc, AAC_SA_MAILBOX + 4, arg0);
2135         AAC_SETREG4(sc, AAC_SA_MAILBOX + 8, arg1);
2136         AAC_SETREG4(sc, AAC_SA_MAILBOX + 12, arg2);
2137         AAC_SETREG4(sc, AAC_SA_MAILBOX + 16, arg3);
2138 }
2139
2140 static void
2141 aac_rx_set_mailbox(struct aac_softc *sc, u_int32_t command,
2142                 u_int32_t arg0, u_int32_t arg1, u_int32_t arg2, u_int32_t arg3)
2143 {
2144         debug_called(4);
2145
2146         AAC_SETREG4(sc, AAC_RX_MAILBOX, command);
2147         AAC_SETREG4(sc, AAC_RX_MAILBOX + 4, arg0);
2148         AAC_SETREG4(sc, AAC_RX_MAILBOX + 8, arg1);
2149         AAC_SETREG4(sc, AAC_RX_MAILBOX + 12, arg2);
2150         AAC_SETREG4(sc, AAC_RX_MAILBOX + 16, arg3);
2151 }
2152
2153 static void
2154 aac_fa_set_mailbox(struct aac_softc *sc, u_int32_t command,
2155                 u_int32_t arg0, u_int32_t arg1, u_int32_t arg2, u_int32_t arg3)
2156 {
2157         debug_called(4);
2158
2159         AAC_SETREG4(sc, AAC_FA_MAILBOX, command);
2160         AAC_FA_HACK(sc);
2161         AAC_SETREG4(sc, AAC_FA_MAILBOX + 4, arg0);
2162         AAC_FA_HACK(sc);
2163         AAC_SETREG4(sc, AAC_FA_MAILBOX + 8, arg1);
2164         AAC_FA_HACK(sc);
2165         AAC_SETREG4(sc, AAC_FA_MAILBOX + 12, arg2);
2166         AAC_FA_HACK(sc);
2167         AAC_SETREG4(sc, AAC_FA_MAILBOX + 16, arg3);
2168         AAC_FA_HACK(sc);
2169 }
2170
2171 /*
2172  * Fetch the immediate command status word
2173  */
2174 static int
2175 aac_sa_get_mailbox(struct aac_softc *sc, int mb)
2176 {
2177         debug_called(4);
2178
2179         return(AAC_GETREG4(sc, AAC_SA_MAILBOX + (mb * 4)));
2180 }
2181
2182 static int
2183 aac_rx_get_mailbox(struct aac_softc *sc, int mb)
2184 {
2185         debug_called(4);
2186
2187         return(AAC_GETREG4(sc, AAC_RX_MAILBOX + (mb * 4)));
2188 }
2189
2190 static int
2191 aac_fa_get_mailbox(struct aac_softc *sc, int mb)
2192 {
2193         int val;
2194
2195         debug_called(4);
2196
2197         val = AAC_GETREG4(sc, AAC_FA_MAILBOX + (mb * 4));
2198         return (val);
2199 }
2200
2201 /*
2202  * Set/clear interrupt masks
2203  */
2204 static void
2205 aac_sa_set_interrupts(struct aac_softc *sc, int enable)
2206 {
2207         debug(2, "%sable interrupts", enable ? "en" : "dis");
2208
2209         if (enable) {
2210                 AAC_SETREG2((sc), AAC_SA_MASK0_CLEAR, AAC_DB_INTERRUPTS);
2211         } else {
2212                 AAC_SETREG2((sc), AAC_SA_MASK0_SET, ~0);
2213         }
2214 }
2215
2216 static void
2217 aac_rx_set_interrupts(struct aac_softc *sc, int enable)
2218 {
2219         debug(2, "%sable interrupts", enable ? "en" : "dis");
2220
2221         if (enable) {
2222                 AAC_SETREG4(sc, AAC_RX_OIMR, ~AAC_DB_INTERRUPTS);
2223         } else {
2224                 AAC_SETREG4(sc, AAC_RX_OIMR, ~0);
2225         }
2226 }
2227
2228 static void
2229 aac_fa_set_interrupts(struct aac_softc *sc, int enable)
2230 {
2231         debug(2, "%sable interrupts", enable ? "en" : "dis");
2232
2233         if (enable) {
2234                 AAC_SETREG2((sc), AAC_FA_MASK0_CLEAR, AAC_DB_INTERRUPTS);
2235                 AAC_FA_HACK(sc);
2236         } else {
2237                 AAC_SETREG2((sc), AAC_FA_MASK0, ~0);
2238                 AAC_FA_HACK(sc);
2239         }
2240 }
2241
2242 /*
2243  * Debugging and Diagnostics
2244  */
2245
2246 /*
2247  * Print some information about the controller.
2248  */
2249 static void
2250 aac_describe_controller(struct aac_softc *sc)
2251 {
2252         struct aac_fib *fib;
2253         struct aac_adapter_info *info;
2254
2255         debug_called(2);
2256
2257         aac_alloc_sync_fib(sc, &fib, 0);
2258
2259         fib->data[0] = 0;
2260         if (aac_sync_fib(sc, RequestAdapterInfo, 0, fib, 1)) {
2261                 device_printf(sc->aac_dev, "RequestAdapterInfo failed\n");
2262                 aac_release_sync_fib(sc);
2263                 return;
2264         }
2265         info = (struct aac_adapter_info *)&fib->data[0];   
2266
2267         device_printf(sc->aac_dev, "%s %dMHz, %dMB cache memory, %s\n", 
2268                       aac_describe_code(aac_cpu_variant, info->CpuVariant),
2269                       info->ClockSpeed, info->BufferMem / (1024 * 1024), 
2270                       aac_describe_code(aac_battery_platform,
2271                                         info->batteryPlatform));
2272
2273         /* save the kernel revision structure for later use */
2274         sc->aac_revision = info->KernelRevision;
2275         device_printf(sc->aac_dev, "Kernel %d.%d-%d, Build %d, S/N %6X\n",
2276                       info->KernelRevision.external.comp.major,
2277                       info->KernelRevision.external.comp.minor,
2278                       info->KernelRevision.external.comp.dash,
2279                       info->KernelRevision.buildNumber,
2280                       (u_int32_t)(info->SerialNumber & 0xffffff));
2281
2282         aac_release_sync_fib(sc);
2283
2284         if (1 || bootverbose) {
2285                 device_printf(sc->aac_dev, "Supported Options=%b\n",
2286                               sc->supported_options,
2287                               "\20"
2288                               "\1SNAPSHOT"
2289                               "\2CLUSTERS"
2290                               "\3WCACHE"
2291                               "\4DATA64"
2292                               "\5HOSTTIME"
2293                               "\6RAID50"
2294                               "\7WINDOW4GB"
2295                               "\10SCSIUPGD"
2296                               "\11SOFTERR"
2297                               "\12NORECOND"
2298                               "\13SGMAP64"
2299                               "\14ALARM"
2300                               "\15NONDASD");
2301         }
2302 }
2303
2304 /*
2305  * Look up a text description of a numeric error code and return a pointer to
2306  * same.
2307  */
2308 static char *
2309 aac_describe_code(struct aac_code_lookup *table, u_int32_t code)
2310 {
2311         int i;
2312
2313         for (i = 0; table[i].string != NULL; i++)
2314                 if (table[i].code == code)
2315                         return(table[i].string);
2316         return(table[i + 1].string);
2317 }
2318
2319 /*
2320  * Management Interface
2321  */
2322
2323 static int
2324 aac_open(dev_t dev, int flags, int fmt, d_thread_t *td)
2325 {
2326         struct aac_softc *sc;
2327
2328         debug_called(2);
2329
2330         sc = dev->si_drv1;
2331
2332         /* Check to make sure the device isn't already open */
2333         if (sc->aac_state & AAC_STATE_OPEN) {
2334                 return EBUSY;
2335         }
2336         sc->aac_state |= AAC_STATE_OPEN;
2337
2338         return 0;
2339 }
2340
2341 static int
2342 aac_close(dev_t dev, int flags, int fmt, d_thread_t *td)
2343 {
2344         struct aac_softc *sc;
2345
2346         debug_called(2);
2347
2348         sc = dev->si_drv1;
2349
2350         /* Mark this unit as no longer open  */
2351         sc->aac_state &= ~AAC_STATE_OPEN;
2352
2353         return 0;
2354 }
2355
2356 static int
2357 aac_ioctl(dev_t dev, u_long cmd, caddr_t arg, int flag, d_thread_t *td)
2358 {
2359         union aac_statrequest *as;
2360         struct aac_softc *sc;
2361         int error = 0;
2362         int i;
2363
2364         debug_called(2);
2365
2366         as = (union aac_statrequest *)arg;
2367         sc = dev->si_drv1;
2368
2369         switch (cmd) {
2370         case AACIO_STATS:
2371                 switch (as->as_item) {
2372                 case AACQ_FREE:
2373                 case AACQ_BIO:
2374                 case AACQ_READY:
2375                 case AACQ_BUSY:
2376                 case AACQ_COMPLETE:
2377                         bcopy(&sc->aac_qstat[as->as_item], &as->as_qstat,
2378                               sizeof(struct aac_qstat));
2379                         break;
2380                 default:
2381                         error = ENOENT;
2382                         break;
2383                 }
2384         break;
2385         
2386         case FSACTL_SENDFIB:
2387                 arg = *(caddr_t*)arg;
2388         case FSACTL_LNX_SENDFIB:
2389                 debug(1, "FSACTL_SENDFIB");
2390                 error = aac_ioctl_sendfib(sc, arg);
2391                 break;
2392         case FSACTL_AIF_THREAD:
2393         case FSACTL_LNX_AIF_THREAD:
2394                 debug(1, "FSACTL_AIF_THREAD");
2395                 error = EINVAL;
2396                 break;
2397         case FSACTL_OPEN_GET_ADAPTER_FIB:
2398                 arg = *(caddr_t*)arg;
2399         case FSACTL_LNX_OPEN_GET_ADAPTER_FIB:
2400                 debug(1, "FSACTL_OPEN_GET_ADAPTER_FIB");
2401                 /*
2402                  * Pass the caller out an AdapterFibContext.
2403                  *
2404                  * Note that because we only support one opener, we
2405                  * basically ignore this.  Set the caller's context to a magic
2406                  * number just in case.
2407                  *
2408                  * The Linux code hands the driver a pointer into kernel space,
2409                  * and then trusts it when the caller hands it back.  Aiee!
2410                  * Here, we give it the proc pointer of the per-adapter aif 
2411                  * thread. It's only used as a sanity check in other calls.
2412                  */
2413                 i = (int)sc->aifthread;
2414                 error = copyout(&i, arg, sizeof(i));
2415                 break;
2416         case FSACTL_GET_NEXT_ADAPTER_FIB:
2417                 arg = *(caddr_t*)arg;
2418         case FSACTL_LNX_GET_NEXT_ADAPTER_FIB:
2419                 debug(1, "FSACTL_GET_NEXT_ADAPTER_FIB");
2420                 error = aac_getnext_aif(sc, arg);
2421                 break;
2422         case FSACTL_CLOSE_GET_ADAPTER_FIB:
2423         case FSACTL_LNX_CLOSE_GET_ADAPTER_FIB:
2424                 debug(1, "FSACTL_CLOSE_GET_ADAPTER_FIB");
2425                 /* don't do anything here */
2426                 break;
2427         case FSACTL_MINIPORT_REV_CHECK:
2428                 arg = *(caddr_t*)arg;
2429         case FSACTL_LNX_MINIPORT_REV_CHECK:
2430                 debug(1, "FSACTL_MINIPORT_REV_CHECK");
2431                 error = aac_rev_check(sc, arg);
2432                 break;
2433         case FSACTL_QUERY_DISK:
2434                 arg = *(caddr_t*)arg;
2435         case FSACTL_LNX_QUERY_DISK:
2436                 debug(1, "FSACTL_QUERY_DISK");
2437                 error = aac_query_disk(sc, arg);
2438                         break;
2439         case FSACTL_DELETE_DISK:
2440         case FSACTL_LNX_DELETE_DISK:
2441                 /*
2442                  * We don't trust the underland to tell us when to delete a
2443                  * container, rather we rely on an AIF coming from the 
2444                  * controller
2445                  */
2446                 error = 0;
2447                 break;
2448         default:
2449                 debug(1, "unsupported cmd 0x%lx\n", cmd);
2450                 error = EINVAL;
2451                 break;
2452         }
2453         return(error);
2454 }
2455
2456 static int
2457 aac_poll(dev_t dev, int poll_events, d_thread_t *td)
2458 {
2459         struct aac_softc *sc;
2460         int revents;
2461
2462         sc = dev->si_drv1;
2463         revents = 0;
2464
2465         AAC_LOCK_ACQUIRE(&sc->aac_aifq_lock);
2466         if ((poll_events & (POLLRDNORM | POLLIN)) != 0) {
2467                 if (sc->aac_aifq_tail != sc->aac_aifq_head)
2468                         revents |= poll_events & (POLLIN | POLLRDNORM);
2469         }
2470         AAC_LOCK_RELEASE(&sc->aac_aifq_lock);
2471
2472         if (revents == 0) {
2473                 if (poll_events & (POLLIN | POLLRDNORM))
2474                         selrecord(td, &sc->rcv_select);
2475         }
2476
2477         return (revents);
2478 }
2479
2480 /*
2481  * Send a FIB supplied from userspace
2482  */
2483 static int
2484 aac_ioctl_sendfib(struct aac_softc *sc, caddr_t ufib)
2485 {
2486         struct aac_command *cm;
2487         int size, error;
2488
2489         debug_called(2);
2490
2491         cm = NULL;
2492
2493         /*
2494          * Get a command
2495          */
2496         if (aac_alloc_command(sc, &cm)) {
2497                 error = EBUSY;
2498                 goto out;
2499         }
2500
2501         /*
2502          * Fetch the FIB header, then re-copy to get data as well.
2503          */
2504         if ((error = copyin(ufib, cm->cm_fib,
2505                             sizeof(struct aac_fib_header))) != 0)
2506                 goto out;
2507         size = cm->cm_fib->Header.Size + sizeof(struct aac_fib_header);
2508         if (size > sizeof(struct aac_fib)) {
2509                 device_printf(sc->aac_dev, "incoming FIB oversized (%d > %d)\n",
2510                               size, sizeof(struct aac_fib));
2511                 size = sizeof(struct aac_fib);
2512         }
2513         if ((error = copyin(ufib, cm->cm_fib, size)) != 0)
2514                 goto out;
2515         cm->cm_fib->Header.Size = size;
2516         cm->cm_timestamp = time_second;
2517
2518         /*
2519          * Pass the FIB to the controller, wait for it to complete.
2520          */
2521         if ((error = aac_wait_command(cm, 30)) != 0) {  /* XXX user timeout? */
2522                 printf("aac_wait_command return %d\n", error);
2523                 goto out;
2524         }
2525
2526         /*
2527          * Copy the FIB and data back out to the caller.
2528          */
2529         size = cm->cm_fib->Header.Size;
2530         if (size > sizeof(struct aac_fib)) {
2531                 device_printf(sc->aac_dev, "outbound FIB oversized (%d > %d)\n",
2532                               size, sizeof(struct aac_fib));
2533                 size = sizeof(struct aac_fib);
2534         }
2535         error = copyout(cm->cm_fib, ufib, size);
2536
2537 out:
2538         if (cm != NULL) {
2539                 aac_release_command(cm);
2540         }
2541         return(error);
2542 }
2543
2544 /*
2545  * Handle an AIF sent to us by the controller; queue it for later reference.
2546  * If the queue fills up, then drop the older entries.
2547  */
2548 static void
2549 aac_handle_aif(struct aac_softc *sc, struct aac_fib *fib)
2550 {
2551         struct aac_aif_command *aif;
2552         struct aac_container *co, *co_next;
2553         struct aac_mntinfo *mi;
2554         struct aac_mntinforesp *mir = NULL;
2555         u_int16_t rsize;
2556         int next, found;
2557         int added = 0, i = 0;
2558
2559         debug_called(2);
2560
2561         aif = (struct aac_aif_command*)&fib->data[0];
2562         aac_print_aif(sc, aif);
2563
2564         /* Is it an event that we should care about? */
2565         switch (aif->command) {
2566         case AifCmdEventNotify:
2567                 switch (aif->data.EN.type) {
2568                 case AifEnAddContainer:
2569                 case AifEnDeleteContainer:
2570                         /*
2571                          * A container was added or deleted, but the message 
2572                          * doesn't tell us anything else!  Re-enumerate the
2573                          * containers and sort things out.
2574                          */
2575                         aac_alloc_sync_fib(sc, &fib, 0);
2576                         mi = (struct aac_mntinfo *)&fib->data[0];
2577                         do {
2578                                 /*
2579                                  * Ask the controller for its containers one at
2580                                  * a time.
2581                                  * XXX What if the controller's list changes
2582                                  * midway through this enumaration?
2583                                  * XXX This should be done async.
2584                                  */
2585                                 bzero(mi, sizeof(struct aac_mntinfo));
2586                                 mi->Command = VM_NameServe;
2587                                 mi->MntType = FT_FILESYS;
2588                                 mi->MntCount = i;
2589                                 rsize = sizeof(mir);
2590                                 if (aac_sync_fib(sc, ContainerCommand, 0, fib,
2591                                                  sizeof(struct aac_mntinfo))) {
2592                                         debug(2, "Error probing container %d\n",
2593                                               i);
2594                                         continue;
2595                                 }
2596                                 mir = (struct aac_mntinforesp *)&fib->data[0];
2597                                 /*
2598                                  * Check the container against our list.
2599                                  * co->co_found was already set to 0 in a
2600                                  * previous run.
2601                                  */
2602                                 if ((mir->Status == ST_OK) &&
2603                                     (mir->MntTable[0].VolType != CT_NONE)) {
2604                                         found = 0;
2605                                         TAILQ_FOREACH(co,
2606                                                       &sc->aac_container_tqh, 
2607                                                       co_link) {
2608                                                 if (co->co_mntobj.ObjectId ==
2609                                                     mir->MntTable[0].ObjectId) {
2610                                                         co->co_found = 1;
2611                                                         found = 1;
2612                                                         break;
2613                                                 }
2614                                         }
2615                                         /*
2616                                          * If the container matched, continue
2617                                          * in the list.
2618                                          */
2619                                         if (found) {
2620                                                 i++;
2621                                                 continue;
2622                                         }
2623
2624                                         /*
2625                                          * This is a new container.  Do all the
2626                                          * appropriate things to set it up.                                              */
2627                                         aac_add_container(sc, mir, 1);
2628                                         added = 1;
2629                                 }
2630                                 i++;
2631                         } while ((i < mir->MntRespCount) &&
2632                                  (i < AAC_MAX_CONTAINERS));
2633                         aac_release_sync_fib(sc);
2634
2635                         /*
2636                          * Go through our list of containers and see which ones
2637                          * were not marked 'found'.  Since the controller didn't
2638                          * list them they must have been deleted.  Do the
2639                          * appropriate steps to destroy the device.  Also reset
2640                          * the co->co_found field.
2641                          */
2642                         co = TAILQ_FIRST(&sc->aac_container_tqh);
2643                         while (co != NULL) {
2644                                 if (co->co_found == 0) {
2645                                         device_delete_child(sc->aac_dev,
2646                                                             co->co_disk);
2647                                         co_next = TAILQ_NEXT(co, co_link);
2648                                         AAC_LOCK_ACQUIRE(&sc->
2649                                                         aac_container_lock);
2650                                         TAILQ_REMOVE(&sc->aac_container_tqh, co,
2651                                                      co_link);
2652                                         AAC_LOCK_RELEASE(&sc->
2653                                                          aac_container_lock);
2654                                         FREE(co, M_AACBUF);
2655                                         co = co_next;
2656                                 } else {
2657                                         co->co_found = 0;
2658                                         co = TAILQ_NEXT(co, co_link);
2659                                 }
2660                         }
2661
2662                         /* Attach the newly created containers */
2663                         if (added)
2664                                 bus_generic_attach(sc->aac_dev);
2665         
2666                                 break;
2667
2668                 default:
2669                         break;
2670                 }
2671
2672         default:
2673                 break;
2674         }
2675
2676         /* Copy the AIF data to the AIF queue for ioctl retrieval */
2677         AAC_LOCK_ACQUIRE(&sc->aac_aifq_lock);
2678         next = (sc->aac_aifq_head + 1) % AAC_AIFQ_LENGTH;
2679         if (next != sc->aac_aifq_tail) {
2680                 bcopy(aif, &sc->aac_aifq[next], sizeof(struct aac_aif_command));
2681                 sc->aac_aifq_head = next;
2682
2683                 /* On the off chance that someone is sleeping for an aif... */
2684                 if (sc->aac_state & AAC_STATE_AIF_SLEEPER)
2685                         wakeup(sc->aac_aifq);
2686                 /* token may have been lost */
2687                 /* Wakeup any poll()ers */
2688                 selwakeup(&sc->rcv_select);
2689                 /* token may have been lost */
2690         }
2691         AAC_LOCK_RELEASE(&sc->aac_aifq_lock);
2692
2693         return;
2694 }
2695
2696 /*
2697  * Return the Revision of the driver to userspace and check to see if the
2698  * userspace app is possibly compatible.  This is extremely bogus since
2699  * our driver doesn't follow Adaptec's versioning system.  Cheat by just
2700  * returning what the card reported.
2701  */
2702 static int
2703 aac_rev_check(struct aac_softc *sc, caddr_t udata)
2704 {
2705         struct aac_rev_check rev_check;
2706         struct aac_rev_check_resp rev_check_resp;
2707         int error = 0;
2708
2709         debug_called(2);
2710
2711         /*
2712          * Copyin the revision struct from userspace
2713          */
2714         if ((error = copyin(udata, (caddr_t)&rev_check,
2715                         sizeof(struct aac_rev_check))) != 0) {
2716                 return error;
2717         }
2718
2719         debug(2, "Userland revision= %d\n",
2720               rev_check.callingRevision.buildNumber);
2721
2722         /*
2723          * Doctor up the response struct.
2724          */
2725         rev_check_resp.possiblyCompatible = 1;
2726         rev_check_resp.adapterSWRevision.external.ul =
2727             sc->aac_revision.external.ul;
2728         rev_check_resp.adapterSWRevision.buildNumber =
2729             sc->aac_revision.buildNumber;
2730
2731         return(copyout((caddr_t)&rev_check_resp, udata,
2732                         sizeof(struct aac_rev_check_resp)));
2733 }
2734
2735 /*
2736  * Pass the caller the next AIF in their queue
2737  */
2738 static int
2739 aac_getnext_aif(struct aac_softc *sc, caddr_t arg)
2740 {
2741         struct get_adapter_fib_ioctl agf;
2742         int error, s;
2743
2744         debug_called(2);
2745
2746         if ((error = copyin(arg, &agf, sizeof(agf))) == 0) {
2747
2748                 /*
2749                  * Check the magic number that we gave the caller.
2750                  */
2751                 if (agf.AdapterFibContext != (int)sc->aifthread) {
2752                         error = EFAULT;
2753                 } else {
2754         
2755                         s = splbio();
2756                         error = aac_return_aif(sc, agf.AifFib);
2757         
2758                         if ((error == EAGAIN) && (agf.Wait)) {
2759                                 sc->aac_state |= AAC_STATE_AIF_SLEEPER;
2760                                 while (error == EAGAIN) {
2761                                         error = tsleep(sc->aac_aifq,
2762                                                        PCATCH, "aacaif", 0);
2763                                         if (error == 0)
2764                                                 error = aac_return_aif(sc,
2765                                                     agf.AifFib);
2766                                 }
2767                                 sc->aac_state &= ~AAC_STATE_AIF_SLEEPER;
2768                         }
2769                 splx(s);
2770                 }
2771         }
2772         return(error);
2773 }
2774
2775 /*
2776  * Hand the next AIF off the top of the queue out to userspace.
2777  *
2778  * YYY token could be lost during copyout
2779  */
2780 static int
2781 aac_return_aif(struct aac_softc *sc, caddr_t uptr)
2782 {
2783         int error;
2784
2785         debug_called(2);
2786
2787         AAC_LOCK_ACQUIRE(&sc->aac_aifq_lock);
2788         if (sc->aac_aifq_tail == sc->aac_aifq_head) {
2789                 error = EAGAIN;
2790         } else {
2791                 error = copyout(&sc->aac_aifq[sc->aac_aifq_tail], uptr,
2792                                 sizeof(struct aac_aif_command));
2793                 if (error)
2794                         printf("aac_return_aif: copyout returned %d\n", error);
2795                 if (!error)
2796                         sc->aac_aifq_tail = (sc->aac_aifq_tail + 1) %
2797                                             AAC_AIFQ_LENGTH;
2798         }
2799         AAC_LOCK_RELEASE(&sc->aac_aifq_lock);
2800         return(error);
2801 }
2802
2803 /*
2804  * Give the userland some information about the container.  The AAC arch
2805  * expects the driver to be a SCSI passthrough type driver, so it expects
2806  * the containers to have b:t:l numbers.  Fake it.
2807  */
2808 static int
2809 aac_query_disk(struct aac_softc *sc, caddr_t uptr)
2810 {
2811         struct aac_query_disk query_disk;
2812         struct aac_container *co;
2813         struct aac_disk *disk;
2814         int error, id;
2815
2816         debug_called(2);
2817
2818         disk = NULL;
2819
2820         error = copyin(uptr, (caddr_t)&query_disk,
2821                        sizeof(struct aac_query_disk));
2822         if (error)
2823                 return (error);
2824
2825         id = query_disk.ContainerNumber;
2826         if (id == -1)
2827                 return (EINVAL);
2828
2829         AAC_LOCK_ACQUIRE(&sc->aac_container_lock);
2830         TAILQ_FOREACH(co, &sc->aac_container_tqh, co_link) {
2831                 if (co->co_mntobj.ObjectId == id)
2832                         break;
2833                 }
2834
2835                 if (co == NULL) {
2836                         query_disk.Valid = 0;
2837                         query_disk.Locked = 0;
2838                         query_disk.Deleted = 1;         /* XXX is this right? */
2839                 } else {
2840                         disk = device_get_softc(co->co_disk);
2841                         query_disk.Valid = 1;
2842                         query_disk.Locked =
2843                             (disk->ad_flags & AAC_DISK_OPEN) ? 1 : 0;
2844                         query_disk.Deleted = 0;
2845                         query_disk.Bus = device_get_unit(sc->aac_dev);
2846                         query_disk.Target = disk->unit;
2847                         query_disk.Lun = 0;
2848                         query_disk.UnMapped = 0;
2849                         bcopy(disk->ad_dev_t->si_name,
2850                               &query_disk.diskDeviceName[0], 10);
2851                 }
2852         AAC_LOCK_RELEASE(&sc->aac_container_lock);
2853
2854         error = copyout((caddr_t)&query_disk, uptr,
2855                         sizeof(struct aac_query_disk));
2856
2857         return (error);
2858 }
2859
2860 static void
2861 aac_get_bus_info(struct aac_softc *sc)
2862 {
2863         struct aac_fib *fib;
2864         struct aac_ctcfg *c_cmd;
2865         struct aac_ctcfg_resp *c_resp;
2866         struct aac_vmioctl *vmi;
2867         struct aac_vmi_businf_resp *vmi_resp;
2868         struct aac_getbusinf businfo;
2869         struct aac_cam_inf *caminf;
2870         device_t child;
2871         int i, found, error;
2872
2873         aac_alloc_sync_fib(sc, &fib, 0);
2874         c_cmd = (struct aac_ctcfg *)&fib->data[0];
2875         bzero(c_cmd, sizeof(struct aac_ctcfg));
2876
2877         c_cmd->Command = VM_ContainerConfig;
2878         c_cmd->cmd = CT_GET_SCSI_METHOD;
2879         c_cmd->param = 0;
2880
2881         error = aac_sync_fib(sc, ContainerCommand, 0, fib,
2882             sizeof(struct aac_ctcfg));
2883         if (error) {
2884                 device_printf(sc->aac_dev, "Error %d sending "
2885                     "VM_ContainerConfig command\n", error);
2886                 aac_release_sync_fib(sc);
2887                 return;
2888         }
2889
2890         c_resp = (struct aac_ctcfg_resp *)&fib->data[0];
2891         if (c_resp->Status != ST_OK) {
2892                 device_printf(sc->aac_dev, "VM_ContainerConfig returned 0x%x\n",
2893                     c_resp->Status);
2894                 aac_release_sync_fib(sc);
2895                 return;
2896         }
2897
2898         sc->scsi_method_id = c_resp->param;
2899
2900         vmi = (struct aac_vmioctl *)&fib->data[0];
2901         bzero(vmi, sizeof(struct aac_vmioctl));
2902
2903         vmi->Command = VM_Ioctl;
2904         vmi->ObjType = FT_DRIVE;
2905         vmi->MethId = sc->scsi_method_id;
2906         vmi->ObjId = 0;
2907         vmi->IoctlCmd = GetBusInfo;
2908
2909         error = aac_sync_fib(sc, ContainerCommand, 0, fib,
2910             sizeof(struct aac_vmioctl));
2911         if (error) {
2912                 device_printf(sc->aac_dev, "Error %d sending VMIoctl command\n",
2913                     error);
2914                 aac_release_sync_fib(sc);
2915                 return;
2916         }
2917
2918         vmi_resp = (struct aac_vmi_businf_resp *)&fib->data[0];
2919         if (vmi_resp->Status != ST_OK) {
2920                 debug(1, "VM_Ioctl returned %d\n", vmi_resp->Status);
2921                 aac_release_sync_fib(sc);
2922                 return;
2923         }
2924
2925         bcopy(&vmi_resp->BusInf, &businfo, sizeof(struct aac_getbusinf));
2926         aac_release_sync_fib(sc);
2927
2928         found = 0;
2929         for (i = 0; i < businfo.BusCount; i++) {
2930                 if (businfo.BusValid[i] != AAC_BUS_VALID)
2931                         continue;
2932
2933                 MALLOC(caminf, struct aac_cam_inf *,
2934                     sizeof(struct aac_cam_inf), M_AACBUF, M_NOWAIT | M_ZERO);
2935                 if (caminf == NULL)
2936                         continue;
2937
2938                 child = device_add_child(sc->aac_dev, "aacp", -1);
2939                 if (child == NULL) {
2940                         device_printf(sc->aac_dev, "device_add_child failed\n");
2941                         continue;
2942                 }
2943
2944                 caminf->TargetsPerBus = businfo.TargetsPerBus;
2945                 caminf->BusNumber = i;
2946                 caminf->InitiatorBusId = businfo.InitiatorBusId[i];
2947                 caminf->aac_sc = sc;
2948
2949                 device_set_ivars(child, caminf);
2950                 device_set_desc(child, "SCSI Passthrough Bus");
2951
2952                 found = 1;
2953         }
2954
2955         if (found)
2956                 bus_generic_attach(sc->aac_dev);
2957
2958         return;
2959 }