Remove unused consumer of timeout
[dragonfly.git] / sys / dev / raid / dpt / dpt_scsi.c
1 /*
2  *       Copyright (c) 1997 by Simon Shapiro
3  *       All Rights Reserved
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions, and the following disclaimer,
10  *    without modification, immediately at the beginning of the file.
11  * 2. Redistributions in binary form must reproduce the above copyright
12  *    notice, this list of conditions and the following disclaimer in the
13  *    documentation and/or other materials provided with the distribution.
14  * 3. The name of the author may not be used to endorse or promote products
15  *    derived from this software without specific prior written permission.
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 FOR
21  * 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
30 /*
31  * dpt_scsi.c: SCSI dependant code for the DPT driver
32  *
33  * credits:     Assisted by Mike Neuffer in the early low level DPT code
34  *              Thanx to Mark Salyzyn of DPT for his assistance.
35  *              Special thanx to Justin Gibbs for invaluable help in
36  *              making this driver look and work like a FreeBSD component.
37  *              Last but not least, many thanx to UCB and the FreeBSD
38  *              team for creating and maintaining such a wonderful O/S.
39  *
40  * TODO:     * Add ISA probe code.
41  *           * Add driver-level RAID-0. This will allow interoperability with
42  *             NiceTry, M$-Doze, Win-Dog, Slowlaris, etc., in recognizing RAID
43  *             arrays that span controllers (Wow!).
44  */
45
46 #ident "$FreeBSD: src/sys/dev/dpt/dpt_scsi.c,v 1.28.2.3 2003/01/31 02:47:10 grog Exp $"
47 #ident "$DragonFly: src/sys/dev/raid/dpt/dpt_scsi.c,v 1.7 2004/09/15 15:40:54 joerg Exp $"
48
49 #define _DPT_C_
50
51 #include "opt_dpt.h"
52 #include <sys/param.h>
53 #include <sys/systm.h>
54 #include <sys/eventhandler.h>
55 #include <sys/malloc.h>
56 #include <sys/kernel.h>
57
58 #include <sys/bus.h>
59
60 #include <machine/bus_memio.h>
61 #include <machine/bus_pio.h>
62 #include <machine/bus.h>
63
64 #include <machine/clock.h>
65
66 #include <bus/cam/cam.h>
67 #include <bus/cam/cam_ccb.h>
68 #include <bus/cam/cam_sim.h>
69 #include <bus/cam/cam_xpt_sim.h>
70 #include <bus/cam/cam_debug.h>
71 #include <bus/cam/scsi/scsi_all.h>
72 #include <bus/cam/scsi/scsi_message.h>
73
74 #include <vm/vm.h>
75 #include <vm/pmap.h>
76
77 #include "dpt.h"
78
79 /* dpt_isa.c, dpt_eisa.c, and dpt_pci.c need this in a central place */
80 int dpt_controllers_present;
81
82 u_long  dpt_unit;       /* Next unit number to use */
83
84 /* The linked list of softc structures */
85 struct dpt_softc_list dpt_softcs = TAILQ_HEAD_INITIALIZER(dpt_softcs);
86
87 #define microtime_now dpt_time_now()
88
89 #define dpt_inl(dpt, port)                              \
90         bus_space_read_4((dpt)->tag, (dpt)->bsh, port)
91 #define dpt_inb(dpt, port)                              \
92         bus_space_read_1((dpt)->tag, (dpt)->bsh, port)
93 #define dpt_outl(dpt, port, value)                      \
94         bus_space_write_4((dpt)->tag, (dpt)->bsh, port, value)
95 #define dpt_outb(dpt, port, value)                      \
96         bus_space_write_1((dpt)->tag, (dpt)->bsh, port, value)
97
98 /*
99  * These will have to be setup by parameters passed at boot/load time. For
100  * perfromance reasons, we make them constants for the time being.
101  */
102 #define dpt_min_segs    DPT_MAX_SEGS
103 #define dpt_max_segs    DPT_MAX_SEGS
104
105 /* Definitions for our use of the SIM private CCB area */
106 #define ccb_dccb_ptr spriv_ptr0
107 #define ccb_dpt_ptr spriv_ptr1
108
109 /* ================= Private Inline Function declarations ===================*/
110 static __inline int             dpt_just_reset(dpt_softc_t * dpt);
111 static __inline int             dpt_raid_busy(dpt_softc_t * dpt);
112 static __inline int             dpt_pio_wait (u_int32_t, u_int, u_int, u_int);
113 static __inline int             dpt_wait(dpt_softc_t *dpt, u_int bits,
114                                          u_int state);
115 static __inline struct dpt_ccb* dptgetccb(struct dpt_softc *dpt);
116 static __inline void            dptfreeccb(struct dpt_softc *dpt,
117                                            struct dpt_ccb *dccb);
118 static __inline u_int32_t       dptccbvtop(struct dpt_softc *dpt,
119                                            struct dpt_ccb *dccb);
120
121 static __inline int             dpt_send_immediate(dpt_softc_t *dpt,
122                                                    eata_ccb_t *cmd_block,
123                                                    u_int32_t cmd_busaddr,  
124                                                    u_int retries,
125                                                    u_int ifc, u_int code,
126                                                    u_int code2);
127
128 /* ==================== Private Function declarations =======================*/
129 static void             dptmapmem(void *arg, bus_dma_segment_t *segs,
130                                   int nseg, int error);
131
132 static struct sg_map_node*
133                         dptallocsgmap(struct dpt_softc *dpt);
134
135 static int              dptallocccbs(dpt_softc_t *dpt);
136
137 static int              dpt_get_conf(dpt_softc_t *dpt, dpt_ccb_t *dccb,
138                                      u_int32_t dccb_busaddr, u_int size,
139                                      u_int page, u_int target, int extent);
140 static void             dpt_detect_cache(dpt_softc_t *dpt, dpt_ccb_t *dccb,
141                                          u_int32_t dccb_busaddr,
142                                          u_int8_t *buff);
143
144 static void             dpt_poll(struct cam_sim *sim);
145
146 static void             dptexecuteccb(void *arg, bus_dma_segment_t *dm_segs,
147                                       int nseg, int error);
148
149 static void             dpt_action(struct cam_sim *sim, union ccb *ccb);
150
151 static int              dpt_send_eata_command(dpt_softc_t *dpt, eata_ccb_t *cmd,
152                                               u_int32_t cmd_busaddr,
153                                               u_int command, u_int retries,
154                                               u_int ifc, u_int code,
155                                               u_int code2);
156 static void             dptprocesserror(dpt_softc_t *dpt, dpt_ccb_t *dccb,
157                                         union ccb *ccb, u_int hba_stat,
158                                         u_int scsi_stat, u_int32_t resid);
159
160 static void             dpttimeout(void *arg);
161 static void             dptshutdown(void *arg, int howto);
162
163 /* ================= Private Inline Function definitions ====================*/
164 static __inline int
165 dpt_just_reset(dpt_softc_t * dpt)
166 {
167         if ((dpt_inb(dpt, 2) == 'D')
168          && (dpt_inb(dpt, 3) == 'P')
169          && (dpt_inb(dpt, 4) == 'T')
170          && (dpt_inb(dpt, 5) == 'H'))
171                 return (1);
172         else
173                 return (0);
174 }
175
176 static __inline int
177 dpt_raid_busy(dpt_softc_t * dpt)
178 {
179         if ((dpt_inb(dpt, 0) == 'D')
180          && (dpt_inb(dpt, 1) == 'P')
181          && (dpt_inb(dpt, 2) == 'T'))
182                 return (1);
183         else
184                 return (0);
185 }
186
187 static __inline int
188 dpt_pio_wait (u_int32_t base, u_int reg, u_int bits, u_int state)
189 {
190         int   i;
191         u_int c;
192
193         for (i = 0; i < 20000; i++) {   /* wait 20ms for not busy */
194                 c = inb(base + reg) & bits;
195                 if (!(c == state))
196                         return (0);
197                 else
198                         DELAY(50);
199         }
200         return (-1);
201 }
202
203 static __inline int
204 dpt_wait(dpt_softc_t *dpt, u_int bits, u_int state)
205 {
206         int   i;
207         u_int c;
208
209         for (i = 0; i < 20000; i++) {   /* wait 20ms for not busy */
210                 c = dpt_inb(dpt, HA_RSTATUS) & bits;
211                 if (c == state)
212                         return (0);
213                 else
214                         DELAY(50);
215         }
216         return (-1);
217 }
218
219 static __inline struct dpt_ccb*
220 dptgetccb(struct dpt_softc *dpt)
221 {
222         struct  dpt_ccb* dccb;
223         int     s;
224
225         s = splcam();
226         if ((dccb = SLIST_FIRST(&dpt->free_dccb_list)) != NULL) {
227                 SLIST_REMOVE_HEAD(&dpt->free_dccb_list, links);
228                 dpt->free_dccbs--;
229         } else if (dpt->total_dccbs < dpt->max_dccbs) {
230                 dptallocccbs(dpt);
231                 dccb = SLIST_FIRST(&dpt->free_dccb_list);
232                 if (dccb == NULL)
233                         printf("dpt%d: Can't malloc DCCB\n", dpt->unit);
234                 else {
235                         SLIST_REMOVE_HEAD(&dpt->free_dccb_list, links);
236                         dpt->free_dccbs--;
237                 }
238         }
239         splx(s);
240
241         return (dccb);
242 }
243
244 static __inline void
245 dptfreeccb(struct dpt_softc *dpt, struct dpt_ccb *dccb)
246 {
247         int s;
248
249         s = splcam();
250         if ((dccb->state & DCCB_ACTIVE) != 0)
251                 LIST_REMOVE(&dccb->ccb->ccb_h, sim_links.le);
252         if ((dccb->state & DCCB_RELEASE_SIMQ) != 0)
253                 dccb->ccb->ccb_h.status |= CAM_RELEASE_SIMQ;
254         else if (dpt->resource_shortage != 0
255          && (dccb->ccb->ccb_h.status & CAM_RELEASE_SIMQ) == 0) {
256                 dccb->ccb->ccb_h.status |= CAM_RELEASE_SIMQ;
257                 dpt->resource_shortage = FALSE;
258         }
259         dccb->state = DCCB_FREE;
260         SLIST_INSERT_HEAD(&dpt->free_dccb_list, dccb, links);
261         ++dpt->free_dccbs;
262         splx(s);
263 }
264
265 static __inline u_int32_t
266 dptccbvtop(struct dpt_softc *dpt, struct dpt_ccb *dccb)
267 {
268         return (dpt->dpt_ccb_busbase
269               + (u_int32_t)((caddr_t)dccb - (caddr_t)dpt->dpt_dccbs));
270 }
271
272 static __inline struct dpt_ccb *
273 dptccbptov(struct dpt_softc *dpt, u_int32_t busaddr)
274 {
275         return (dpt->dpt_dccbs
276              +  ((struct dpt_ccb *)busaddr
277                - (struct dpt_ccb *)dpt->dpt_ccb_busbase));
278 }
279
280 /*
281  * Send a command for immediate execution by the DPT
282  * See above function for IMPORTANT notes.
283  */
284 static __inline int
285 dpt_send_immediate(dpt_softc_t *dpt, eata_ccb_t *cmd_block,
286                    u_int32_t cmd_busaddr, u_int retries,
287                    u_int ifc, u_int code, u_int code2)
288 {
289         return (dpt_send_eata_command(dpt, cmd_block, cmd_busaddr,
290                                       EATA_CMD_IMMEDIATE, retries, ifc,
291                                       code, code2));
292 }
293
294
295 /* ===================== Private Function definitions =======================*/
296 static void
297 dptmapmem(void *arg, bus_dma_segment_t *segs, int nseg, int error)
298 {
299         bus_addr_t *busaddrp;
300
301         busaddrp = (bus_addr_t *)arg;
302         *busaddrp = segs->ds_addr;
303 }
304
305 static struct sg_map_node *
306 dptallocsgmap(struct dpt_softc *dpt)
307 {
308         struct sg_map_node *sg_map;
309
310         sg_map = malloc(sizeof(*sg_map), M_DEVBUF, M_INTWAIT);
311
312         /* Allocate S/G space for the next batch of CCBS */
313         if (bus_dmamem_alloc(dpt->sg_dmat, (void **)&sg_map->sg_vaddr,
314                              BUS_DMA_NOWAIT, &sg_map->sg_dmamap) != 0) {
315                 free(sg_map, M_DEVBUF);
316                 return (NULL);
317         }
318
319         (void)bus_dmamap_load(dpt->sg_dmat, sg_map->sg_dmamap, sg_map->sg_vaddr,
320                               PAGE_SIZE, dptmapmem, &sg_map->sg_physaddr,
321                               /*flags*/0);
322
323         SLIST_INSERT_HEAD(&dpt->sg_maps, sg_map, links);
324
325         return (sg_map);
326 }
327
328 /*
329  * Allocate another chunk of CCB's. Return count of entries added.
330  * Assumed to be called at splcam().
331  */
332 static int
333 dptallocccbs(dpt_softc_t *dpt)
334 {
335         struct dpt_ccb *next_ccb;
336         struct sg_map_node *sg_map;
337         bus_addr_t physaddr;
338         dpt_sg_t *segs;
339         int newcount;
340         int i;
341
342         next_ccb = &dpt->dpt_dccbs[dpt->total_dccbs];
343
344         if (next_ccb == dpt->dpt_dccbs) {
345                 /*
346                  * First time through.  Re-use the S/G
347                  * space we allocated for initialization
348                  * CCBS.
349                  */
350                 sg_map = SLIST_FIRST(&dpt->sg_maps);
351         } else {
352                 sg_map = dptallocsgmap(dpt);
353         }
354
355         if (sg_map == NULL)
356                 return (0);
357
358         segs = sg_map->sg_vaddr;
359         physaddr = sg_map->sg_physaddr;
360
361         newcount = (PAGE_SIZE / (dpt->sgsize * sizeof(dpt_sg_t)));
362         for (i = 0; dpt->total_dccbs < dpt->max_dccbs && i < newcount; i++) {
363                 int error;
364
365                 error = bus_dmamap_create(dpt->buffer_dmat, /*flags*/0,
366                                           &next_ccb->dmamap);
367                 if (error != 0)
368                         break;
369                 next_ccb->sg_list = segs;
370                 next_ccb->sg_busaddr = htonl(physaddr);
371                 next_ccb->eata_ccb.cp_dataDMA = htonl(physaddr);
372                 next_ccb->eata_ccb.cp_statDMA = htonl(dpt->sp_physaddr);
373                 next_ccb->eata_ccb.cp_reqDMA =
374                     htonl(dptccbvtop(dpt, next_ccb)
375                         + offsetof(struct dpt_ccb, sense_data));
376                 next_ccb->eata_ccb.cp_busaddr = dpt->dpt_ccb_busend;
377                 next_ccb->state = DCCB_FREE;
378                 next_ccb->tag = dpt->total_dccbs;
379                 SLIST_INSERT_HEAD(&dpt->free_dccb_list, next_ccb, links);
380                 segs += dpt->sgsize;
381                 physaddr += (dpt->sgsize * sizeof(dpt_sg_t));
382                 dpt->dpt_ccb_busend += sizeof(*next_ccb);
383                 next_ccb++;
384                 dpt->total_dccbs++;
385         }
386         return (i);
387 }
388
389 dpt_conf_t *
390 dpt_pio_get_conf (u_int32_t base)
391 {
392         static dpt_conf_t *     conf;
393         u_int16_t *             p;
394         int                     i;
395
396         /*
397          * Allocate a dpt_conf_t
398          */
399         if (conf == NULL)
400                 conf = malloc(sizeof(dpt_conf_t), M_DEVBUF, M_INTWAIT);
401
402         /*
403          * If we have one, clean it up.
404          */
405         bzero(conf, sizeof(dpt_conf_t));
406
407         /*
408          * Reset the controller.
409          */
410         outb((base + HA_WCOMMAND), EATA_CMD_RESET);
411
412         /*
413          * Wait for the controller to become ready.
414          * For some reason there can be -no- delays after calling reset
415          * before we wait on ready status.
416          */
417         if (dpt_pio_wait(base, HA_RSTATUS, HA_SBUSY, 0)) {
418                 printf("dpt: timeout waiting for controller to become ready\n");
419                 return (NULL);
420         }
421
422         if (dpt_pio_wait(base, HA_RAUXSTAT, HA_ABUSY, 0)) {
423                 printf("dpt: timetout waiting for adapter ready.\n");
424                 return (NULL);
425         }
426
427         /*
428          * Send the PIO_READ_CONFIG command.
429          */
430         outb((base + HA_WCOMMAND), EATA_CMD_PIO_READ_CONFIG);
431
432         /*
433          * Read the data into the struct.
434          */
435         p = (u_int16_t *)conf;
436         for (i = 0; i < (sizeof(dpt_conf_t) / 2); i++) {
437
438                 if (dpt_pio_wait(base, HA_RSTATUS, HA_SDRQ, 0)) {
439                         printf("dpt: timeout in data read.\n");
440                         return (NULL);
441                 }
442
443                 (*p) = inw(base + HA_RDATA);
444                 p++;
445         }
446
447         if (inb(base + HA_RSTATUS) & HA_SERROR) {
448                 printf("dpt: error reading configuration data.\n");
449                 return (NULL);
450         }
451
452 #define BE_EATA_SIGNATURE       0x45415441
453 #define LE_EATA_SIGNATURE       0x41544145
454
455         /*
456          * Test to see if we have a valid card.
457          */
458         if ((conf->signature == BE_EATA_SIGNATURE) ||
459             (conf->signature == LE_EATA_SIGNATURE)) {
460
461                 while (inb(base + HA_RSTATUS) & HA_SDRQ) {
462                         inw(base + HA_RDATA);
463                 }
464
465                 return (conf);
466         }
467         return (NULL);
468 }
469
470 /*
471  * Read a configuration page into the supplied dpt_cont_t buffer.
472  */
473 static int
474 dpt_get_conf(dpt_softc_t *dpt, dpt_ccb_t *dccb, u_int32_t dccb_busaddr,
475              u_int size, u_int page, u_int target, int extent)
476 {
477         eata_ccb_t *cp;
478
479         u_int8_t   status;
480
481         int        ndx;
482         int        ospl;
483         int        result;
484
485         cp = &dccb->eata_ccb;
486         bzero((void *)(uintptr_t)(volatile void *)dpt->sp, sizeof(*dpt->sp));
487
488         cp->Interpret = 1;
489         cp->DataIn = 1;
490         cp->Auto_Req_Sen = 1;
491         cp->reqlen = sizeof(struct scsi_sense_data);
492
493         cp->cp_id = target;
494         cp->cp_LUN = 0;         /* In the EATA packet */
495         cp->cp_lun = 0;         /* In the SCSI command */
496
497         cp->cp_scsi_cmd = INQUIRY;
498         cp->cp_len = size;
499
500         cp->cp_extent = extent;
501
502         cp->cp_page = page;
503         cp->cp_channel = 0;     /* DNC, Interpret mode is set */
504         cp->cp_identify = 1;
505         cp->cp_datalen = htonl(size);
506
507         ospl = splcam();
508
509         /*
510          * This could be a simple for loop, but we suspected the compiler To
511          * have optimized it a bit too much. Wait for the controller to
512          * become ready
513          */
514         while (((status = dpt_inb(dpt, HA_RSTATUS)) != (HA_SREADY | HA_SSC)
515              && (status != (HA_SREADY | HA_SSC | HA_SERROR))
516              && (status != (HA_SDRDY | HA_SERROR | HA_SDRQ)))
517             || (dpt_wait(dpt, HA_SBUSY, 0))) {
518
519                 /*
520                  * RAID Drives still Spinning up? (This should only occur if
521                  * the DPT controller is in a NON PC (PCI?) platform).
522                  */
523                 if (dpt_raid_busy(dpt)) {
524                         printf("dpt%d WARNING: Get_conf() RSUS failed.\n",
525                                dpt->unit);
526                         splx(ospl);
527                         return (0);
528                 }
529         }
530
531         DptStat_Reset_BUSY(dpt->sp);
532
533         /*
534          * XXXX We might want to do something more clever than aborting at
535          * this point, like resetting (rebooting) the controller and trying
536          * again.
537          */
538         if ((result = dpt_send_eata_command(dpt, cp, dccb_busaddr,
539                                             EATA_CMD_DMA_SEND_CP,
540                                             10000, 0, 0, 0)) != 0) {
541                 printf("dpt%d WARNING: Get_conf() failed (%d) to send "
542                        "EATA_CMD_DMA_READ_CONFIG\n",
543                        dpt->unit, result);
544                 splx(ospl);
545                 return (0);
546         }
547         /* Wait for two seconds for a response.  This can be slow  */
548         for (ndx = 0;
549              (ndx < 20000)
550              && !((status = dpt_inb(dpt, HA_RAUXSTAT)) & HA_AIRQ);
551              ndx++) {
552                 DELAY(50);
553         }
554
555         /* Grab the status and clear interrupts */
556         status = dpt_inb(dpt, HA_RSTATUS);
557
558         splx(ospl);
559
560         /*
561          * Check the status carefully.  Return only if the
562          * command was successful.
563          */
564         if (((status & HA_SERROR) == 0)
565          && (dpt->sp->hba_stat == 0)
566          && (dpt->sp->scsi_stat == 0)
567          && (dpt->sp->residue_len == 0))
568                 return (0);
569
570         if (dpt->sp->scsi_stat == SCSI_STATUS_CHECK_COND)
571                 return (0);
572
573         return (1);
574 }
575
576 /* Detect Cache parameters and size */
577 static void
578 dpt_detect_cache(dpt_softc_t *dpt, dpt_ccb_t *dccb, u_int32_t dccb_busaddr,
579                  u_int8_t *buff)
580 {
581         eata_ccb_t *cp;
582         u_int8_t   *param;
583         int         bytes;
584         int         result;
585         int         ospl;
586         int         ndx;
587         u_int8_t    status;
588
589         /*
590          * Default setting, for best perfromance..
591          * This is what virtually all cards default to..
592          */
593         dpt->cache_type = DPT_CACHE_WRITEBACK;
594         dpt->cache_size = 0;
595
596         cp = &dccb->eata_ccb;
597         bzero((void *)(uintptr_t)(volatile void *)dpt->sp, sizeof(dpt->sp));
598         bzero(buff, 512);
599
600         /* Setup the command structure */
601         cp->Interpret = 1;
602         cp->DataIn = 1;
603         cp->Auto_Req_Sen = 1;
604         cp->reqlen = sizeof(struct scsi_sense_data);
605
606         cp->cp_id = 0;          /* who cares?  The HBA will interpret.. */
607         cp->cp_LUN = 0;         /* In the EATA packet */
608         cp->cp_lun = 0;         /* In the SCSI command */
609         cp->cp_channel = 0;
610
611         cp->cp_scsi_cmd = EATA_CMD_DMA_SEND_CP;
612         cp->cp_len = 56;
613
614         cp->cp_extent = 0;
615         cp->cp_page = 0;
616         cp->cp_identify = 1;
617         cp->cp_dispri = 1;
618
619         /*
620          * Build the EATA Command Packet structure
621          * for a Log Sense Command.
622          */
623         cp->cp_cdb[0] = 0x4d;
624         cp->cp_cdb[1] = 0x0;
625         cp->cp_cdb[2] = 0x40 | 0x33;
626         cp->cp_cdb[7] = 1;
627
628         cp->cp_datalen = htonl(512);
629
630         ospl = splcam();
631         result = dpt_send_eata_command(dpt, cp, dccb_busaddr,
632                                        EATA_CMD_DMA_SEND_CP,
633                                        10000, 0, 0, 0);
634         if (result != 0) {
635                 printf("dpt%d WARNING: detect_cache() failed (%d) to send "
636                        "EATA_CMD_DMA_SEND_CP\n", dpt->unit, result);
637                 splx(ospl);
638                 return;
639         }
640         /* Wait for two seconds for a response.  This can be slow... */
641         for (ndx = 0;
642              (ndx < 20000) &&
643              !((status = dpt_inb(dpt, HA_RAUXSTAT)) & HA_AIRQ);
644              ndx++) {
645                 DELAY(50);
646         }
647
648         /* Grab the status and clear interrupts */
649         status = dpt_inb(dpt, HA_RSTATUS);
650         splx(ospl);
651
652         /*
653          * Sanity check
654          */
655         if (buff[0] != 0x33) {
656                 return;
657         }
658         bytes = DPT_HCP_LENGTH(buff);
659         param = DPT_HCP_FIRST(buff);
660
661         if (DPT_HCP_CODE(param) != 1) {
662                 /*
663                  * DPT Log Page layout error
664                  */
665                 printf("dpt%d: NOTICE: Log Page (1) layout error\n",
666                        dpt->unit);
667                 return;
668         }
669         if (!(param[4] & 0x4)) {
670                 dpt->cache_type = DPT_NO_CACHE;
671                 return;
672         }
673         while (DPT_HCP_CODE(param) != 6) {
674                 param = DPT_HCP_NEXT(param);
675                 if ((param < buff)
676                  || (param >= &buff[bytes])) {
677                         return;
678                 }
679         }
680
681         if (param[4] & 0x2) {
682                 /*
683                  * Cache disabled
684                  */
685                 dpt->cache_type = DPT_NO_CACHE;
686                 return;
687         }
688
689         if (param[4] & 0x4) {
690                 dpt->cache_type = DPT_CACHE_WRITETHROUGH;
691         }
692
693         /* XXX This isn't correct.  This log parameter only has two bytes.... */
694 #if 0
695         dpt->cache_size = param[5]
696                         | (param[6] << 8)
697                         | (param[7] << 16)
698                         | (param[8] << 24);
699 #endif
700 }
701
702 static void
703 dpt_poll(struct cam_sim *sim)
704 {
705         dpt_intr(cam_sim_softc(sim));
706 }
707
708 static void
709 dptexecuteccb(void *arg, bus_dma_segment_t *dm_segs, int nseg, int error)
710 {
711         struct   dpt_ccb *dccb;
712         union    ccb *ccb;
713         struct   dpt_softc *dpt;
714         int      s;
715
716         dccb = (struct dpt_ccb *)arg;
717         ccb = dccb->ccb;
718         dpt = (struct dpt_softc *)ccb->ccb_h.ccb_dpt_ptr;
719
720         if (error != 0) {
721                 if (error != EFBIG)
722                         printf("dpt%d: Unexepected error 0x%x returned from "
723                                "bus_dmamap_load\n", dpt->unit, error);
724                 if (ccb->ccb_h.status == CAM_REQ_INPROG) {
725                         xpt_freeze_devq(ccb->ccb_h.path, /*count*/1);
726                         ccb->ccb_h.status = CAM_REQ_TOO_BIG|CAM_DEV_QFRZN;
727                 }
728                 dptfreeccb(dpt, dccb);
729                 xpt_done(ccb);
730                 return;
731         }
732                 
733         if (nseg != 0) {
734                 dpt_sg_t *sg;
735                 bus_dma_segment_t *end_seg;
736                 bus_dmasync_op_t op;
737
738                 end_seg = dm_segs + nseg;
739
740                 /* Copy the segments into our SG list */
741                 sg = dccb->sg_list;
742                 while (dm_segs < end_seg) {
743                         sg->seg_len = htonl(dm_segs->ds_len);
744                         sg->seg_addr = htonl(dm_segs->ds_addr);
745                         sg++;
746                         dm_segs++;
747                 }
748
749                 if (nseg > 1) {
750                         dccb->eata_ccb.scatter = 1;
751                         dccb->eata_ccb.cp_dataDMA = dccb->sg_busaddr;
752                         dccb->eata_ccb.cp_datalen =
753                             htonl(nseg * sizeof(dpt_sg_t));
754                 } else {
755                         dccb->eata_ccb.cp_dataDMA = dccb->sg_list[0].seg_addr;
756                         dccb->eata_ccb.cp_datalen = dccb->sg_list[0].seg_len;
757                 }
758
759                 if ((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN)
760                         op = BUS_DMASYNC_PREREAD;
761                 else
762                         op = BUS_DMASYNC_PREWRITE;
763
764                 bus_dmamap_sync(dpt->buffer_dmat, dccb->dmamap, op);
765
766         } else {
767                 dccb->eata_ccb.cp_dataDMA = 0;
768                 dccb->eata_ccb.cp_datalen = 0;
769         }
770
771         s = splcam();
772
773         /*
774          * Last time we need to check if this CCB needs to
775          * be aborted.
776          */
777         if (ccb->ccb_h.status != CAM_REQ_INPROG) {
778                 if (nseg != 0)
779                         bus_dmamap_unload(dpt->buffer_dmat, dccb->dmamap);
780                 dptfreeccb(dpt, dccb);
781                 xpt_done(ccb);
782                 splx(s);
783                 return;
784         }
785                 
786         dccb->state |= DCCB_ACTIVE;
787         ccb->ccb_h.status |= CAM_SIM_QUEUED;
788         LIST_INSERT_HEAD(&dpt->pending_ccb_list, &ccb->ccb_h, sim_links.le);
789         ccb->ccb_h.timeout_ch =
790             timeout(dpttimeout, (caddr_t)dccb,
791                     (ccb->ccb_h.timeout * hz) / 1000);
792         if (dpt_send_eata_command(dpt, &dccb->eata_ccb,
793                                   dccb->eata_ccb.cp_busaddr,
794                                   EATA_CMD_DMA_SEND_CP, 0, 0, 0, 0) != 0) {
795                 ccb->ccb_h.status = CAM_NO_HBA; /* HBA dead or just busy?? */
796                 if (nseg != 0)
797                         bus_dmamap_unload(dpt->buffer_dmat, dccb->dmamap);
798                 dptfreeccb(dpt, dccb);
799                 xpt_done(ccb);
800         }
801
802         splx(s);
803 }
804
805 static void
806 dpt_action(struct cam_sim *sim, union ccb *ccb)
807 {
808         struct    dpt_softc *dpt;
809
810         CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE, ("dpt_action\n"));
811         
812         dpt = (struct dpt_softc *)cam_sim_softc(sim);
813
814         if ((dpt->state & DPT_HA_SHUTDOWN_ACTIVE) != 0) {
815                 xpt_print_path(ccb->ccb_h.path);
816                 printf("controller is shutdown. Aborting CCB.\n");
817                 ccb->ccb_h.status = CAM_NO_HBA;
818                 xpt_done(ccb);
819                 return;
820         }
821
822         switch (ccb->ccb_h.func_code) {
823         /* Common cases first */
824         case XPT_SCSI_IO:       /* Execute the requested I/O operation */
825         {
826                 struct  ccb_scsiio *csio;
827                 struct  ccb_hdr *ccbh;
828                 struct  dpt_ccb *dccb;
829                 struct  eata_ccb *eccb;
830
831                 csio = &ccb->csio;
832                 ccbh = &ccb->ccb_h;
833                 /* Max CDB length is 12 bytes */
834                 if (csio->cdb_len > 12) { 
835                         ccb->ccb_h.status = CAM_REQ_INVALID;
836                         xpt_done(ccb);
837                         return;
838                 }
839                 if ((dccb = dptgetccb(dpt)) == NULL) {
840                         int s;
841         
842                         s = splcam();
843                         dpt->resource_shortage = 1;
844                         splx(s);
845                         xpt_freeze_simq(sim, /*count*/1);
846                         ccb->ccb_h.status = CAM_REQUEUE_REQ;
847                         xpt_done(ccb);
848                         return;
849                 }
850                 eccb = &dccb->eata_ccb;
851
852                 /* Link dccb and ccb so we can find one from the other */
853                 dccb->ccb = ccb;
854                 ccb->ccb_h.ccb_dccb_ptr = dccb;
855                 ccb->ccb_h.ccb_dpt_ptr = dpt;
856
857                 /*
858                  * Explicitly set all flags so that the compiler can
859                  * be smart about setting them.
860                  */
861                 eccb->SCSI_Reset = 0;
862                 eccb->HBA_Init = 0;
863                 eccb->Auto_Req_Sen = (ccb->ccb_h.flags & CAM_DIS_AUTOSENSE)
864                                    ? 0 : 1;
865                 eccb->scatter = 0;
866                 eccb->Quick = 0;
867                 eccb->Interpret =
868                     ccb->ccb_h.target_id == dpt->hostid[cam_sim_bus(sim)]
869                     ? 1 : 0;
870                 eccb->DataOut = (ccb->ccb_h.flags & CAM_DIR_OUT) ? 1 : 0;
871                 eccb->DataIn = (ccb->ccb_h.flags & CAM_DIR_IN) ? 1 : 0;
872                 eccb->reqlen = csio->sense_len;
873                 eccb->cp_id = ccb->ccb_h.target_id;
874                 eccb->cp_channel = cam_sim_bus(sim);
875                 eccb->cp_LUN = ccb->ccb_h.target_lun;
876                 eccb->cp_luntar = 0;
877                 eccb->cp_dispri = (ccb->ccb_h.flags & CAM_DIS_DISCONNECT)
878                                 ? 0 : 1;
879                 eccb->cp_identify = 1;
880
881                 if ((ccb->ccb_h.flags & CAM_TAG_ACTION_VALID) != 0
882                  && csio->tag_action != CAM_TAG_ACTION_NONE) {
883                         eccb->cp_msg[0] = csio->tag_action;
884                         eccb->cp_msg[1] = dccb->tag;
885                 } else {
886                         eccb->cp_msg[0] = 0;
887                         eccb->cp_msg[1] = 0;
888                 }
889                 eccb->cp_msg[2] = 0;
890
891                 if ((ccb->ccb_h.flags & CAM_CDB_POINTER) != 0) {
892                         if ((ccb->ccb_h.flags & CAM_CDB_PHYS) == 0) {
893                                 bcopy(csio->cdb_io.cdb_ptr,
894                                       eccb->cp_cdb, csio->cdb_len);
895                         } else {
896                                 /* I guess I could map it in... */
897                                 ccb->ccb_h.status = CAM_REQ_INVALID;
898                                 dptfreeccb(dpt, dccb);
899                                 xpt_done(ccb);
900                                 return;
901                         }
902                 } else {
903                         bcopy(csio->cdb_io.cdb_bytes,
904                               eccb->cp_cdb, csio->cdb_len);
905                 }
906                 /*
907                  * If we have any data to send with this command,
908                  * map it into bus space.
909                  */
910                 /* Only use S/G if there is a transfer */
911                 if ((ccbh->flags & CAM_DIR_MASK) != CAM_DIR_NONE) {
912                         if ((ccbh->flags & CAM_SCATTER_VALID) == 0) {
913                                 /*
914                                  * We've been given a pointer
915                                  * to a single buffer.
916                                  */
917                                 if ((ccbh->flags & CAM_DATA_PHYS) == 0) {
918                                         int s;
919                                         int error;
920
921                                         s = splsoftvm();
922                                         error =
923                                             bus_dmamap_load(dpt->buffer_dmat,
924                                                             dccb->dmamap,
925                                                             csio->data_ptr,
926                                                             csio->dxfer_len,
927                                                             dptexecuteccb,
928                                                             dccb, /*flags*/0);
929                                         if (error == EINPROGRESS) {
930                                                 /*
931                                                  * So as to maintain ordering,
932                                                  * freeze the controller queue
933                                                  * until our mapping is
934                                                  * returned.
935                                                  */
936                                                 xpt_freeze_simq(sim, 1);
937                                                 dccb->state |= CAM_RELEASE_SIMQ;
938                                         }
939                                         splx(s);
940                                 } else {
941                                         struct bus_dma_segment seg; 
942
943                                         /* Pointer to physical buffer */
944                                         seg.ds_addr =
945                                             (bus_addr_t)csio->data_ptr;
946                                         seg.ds_len = csio->dxfer_len;
947                                         dptexecuteccb(dccb, &seg, 1, 0);
948                                 }
949                         } else {
950                                 struct bus_dma_segment *segs;
951
952                                 if ((ccbh->flags & CAM_DATA_PHYS) != 0)
953                                         panic("dpt_action - Physical "
954                                               "segment pointers "
955                                               "unsupported");
956
957                                 if ((ccbh->flags&CAM_SG_LIST_PHYS)==0)
958                                         panic("dpt_action - Virtual "
959                                               "segment addresses "
960                                               "unsupported");
961
962                                 /* Just use the segments provided */
963                                 segs = (struct bus_dma_segment *)csio->data_ptr;
964                                 dptexecuteccb(dccb, segs, csio->sglist_cnt, 0);
965                         }
966                 } else {
967                         /*
968                          * XXX JGibbs.
969                          * Does it want them both on or both off?
970                          * CAM_DIR_NONE is both on, so this code can
971                          * be removed if this is also what the DPT
972                          * exptects.
973                          */
974                         eccb->DataOut = 0;
975                         eccb->DataIn = 0;
976                         dptexecuteccb(dccb, NULL, 0, 0);
977                 }
978                 break;
979         }
980         case XPT_RESET_DEV:     /* Bus Device Reset the specified SCSI device */
981         case XPT_ABORT:                 /* Abort the specified CCB */
982                 /* XXX Implement */
983                 ccb->ccb_h.status = CAM_REQ_INVALID;
984                 xpt_done(ccb);
985                 break;
986         case XPT_SET_TRAN_SETTINGS:
987         {
988                 ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
989                 xpt_done(ccb);  
990                 break;
991         }
992         case XPT_GET_TRAN_SETTINGS:
993         /* Get default/user set transfer settings for the target */
994         {
995                 struct  ccb_trans_settings *cts;
996                 u_int   target_mask;
997  
998                 cts = &ccb->cts;
999                 target_mask = 0x01 << ccb->ccb_h.target_id;
1000                 if ((cts->flags & CCB_TRANS_USER_SETTINGS) != 0) { 
1001                         cts->flags = CCB_TRANS_DISC_ENB|CCB_TRANS_TAG_ENB;
1002                         cts->bus_width = (dpt->max_id > 7)
1003                                        ? MSG_EXT_WDTR_BUS_8_BIT
1004                                        : MSG_EXT_WDTR_BUS_16_BIT;
1005                         cts->sync_period = 25; /* 10MHz */
1006
1007                         if (cts->sync_period != 0)
1008                                 cts->sync_offset = 15;
1009
1010                         cts->valid = CCB_TRANS_SYNC_RATE_VALID
1011                                    | CCB_TRANS_SYNC_OFFSET_VALID
1012                                    | CCB_TRANS_BUS_WIDTH_VALID
1013                                    | CCB_TRANS_DISC_VALID
1014                                    | CCB_TRANS_TQ_VALID;
1015                         ccb->ccb_h.status = CAM_REQ_CMP;
1016                 } else {
1017                         ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
1018                 }
1019                 xpt_done(ccb);
1020                 break;
1021         }
1022         case XPT_CALC_GEOMETRY:
1023         {
1024                 struct    ccb_calc_geometry *ccg;
1025                 u_int32_t size_mb;
1026                 u_int32_t secs_per_cylinder;
1027                 int       extended;
1028
1029                 /*
1030                  * XXX Use Adaptec translation until I find out how to
1031                  *     get this information from the card.
1032                  */
1033                 ccg = &ccb->ccg;
1034                 size_mb = ccg->volume_size
1035                         / ((1024L * 1024L) / ccg->block_size);
1036                 extended = 1;
1037                 
1038                 if (size_mb > 1024 && extended) {
1039                         ccg->heads = 255;
1040                         ccg->secs_per_track = 63;
1041                 } else {
1042                         ccg->heads = 64;
1043                         ccg->secs_per_track = 32;
1044                 }
1045                 secs_per_cylinder = ccg->heads * ccg->secs_per_track;
1046                 ccg->cylinders = ccg->volume_size / secs_per_cylinder;
1047                 ccb->ccb_h.status = CAM_REQ_CMP;
1048                 xpt_done(ccb);
1049                 break;
1050         }
1051         case XPT_RESET_BUS:             /* Reset the specified SCSI bus */
1052         {
1053                 /* XXX Implement */
1054                 ccb->ccb_h.status = CAM_REQ_CMP;
1055                 xpt_done(ccb);
1056                 break;
1057         }
1058         case XPT_TERM_IO:               /* Terminate the I/O process */
1059                 /* XXX Implement */
1060                 ccb->ccb_h.status = CAM_REQ_INVALID;
1061                 xpt_done(ccb);
1062                 break;
1063         case XPT_PATH_INQ:              /* Path routing inquiry */
1064         {
1065                 struct ccb_pathinq *cpi = &ccb->cpi;
1066                 
1067                 cpi->version_num = 1;
1068                 cpi->hba_inquiry = PI_SDTR_ABLE|PI_TAG_ABLE;
1069                 if (dpt->max_id > 7)
1070                         cpi->hba_inquiry |= PI_WIDE_16;
1071                 cpi->target_sprt = 0;
1072                 cpi->hba_misc = 0;
1073                 cpi->hba_eng_cnt = 0;
1074                 cpi->max_target = dpt->max_id;
1075                 cpi->max_lun = dpt->max_lun;
1076                 cpi->initiator_id = dpt->hostid[cam_sim_bus(sim)];
1077                 cpi->bus_id = cam_sim_bus(sim);
1078                 cpi->base_transfer_speed = 3300;
1079                 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
1080                 strncpy(cpi->hba_vid, "DPT", HBA_IDLEN);
1081                 strncpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN);
1082                 cpi->unit_number = cam_sim_unit(sim);
1083                 cpi->ccb_h.status = CAM_REQ_CMP;
1084                 xpt_done(ccb);
1085                 break;
1086         }
1087         default:
1088                 ccb->ccb_h.status = CAM_REQ_INVALID;
1089                 xpt_done(ccb);
1090                 break;
1091         }
1092 }
1093
1094 /*
1095  * This routine will try to send an EATA command to the DPT HBA.
1096  * It will, by default, try 20,000 times, waiting 50us between tries.
1097  * It returns 0 on success and 1 on failure.
1098  * It is assumed to be called at splcam().
1099  */
1100 static int
1101 dpt_send_eata_command(dpt_softc_t *dpt, eata_ccb_t *cmd_block,
1102                       u_int32_t cmd_busaddr, u_int command, u_int retries,
1103                       u_int ifc, u_int code, u_int code2)
1104 {
1105         u_int   loop;
1106         
1107         if (!retries)
1108                 retries = 20000;
1109
1110         /*
1111          * I hate this polling nonsense. Wish there was a way to tell the DPT
1112          * to go get commands at its own pace,  or to interrupt when ready.
1113          * In the mean time we will measure how many itterations it really
1114          * takes.
1115          */
1116         for (loop = 0; loop < retries; loop++) {
1117                 if ((dpt_inb(dpt, HA_RAUXSTAT) & HA_ABUSY) == 0)
1118                         break;
1119                 else
1120                         DELAY(50);
1121         }
1122
1123         if (loop < retries) {
1124 #ifdef DPT_MEASURE_PERFORMANCE
1125                 if (loop > dpt->performance.max_eata_tries)
1126                         dpt->performance.max_eata_tries = loop;
1127
1128                 if (loop < dpt->performance.min_eata_tries)
1129                         dpt->performance.min_eata_tries = loop;
1130 #endif
1131         } else {
1132 #ifdef DPT_MEASURE_PERFORMANCE
1133                 ++dpt->performance.command_too_busy;
1134 #endif
1135                 return (1);
1136         }
1137
1138         /* The controller is alive, advance the wedge timer */
1139 #ifdef DPT_RESET_HBA
1140         dpt->last_contact = microtime_now;
1141 #endif
1142
1143         if (cmd_block == NULL)
1144                 cmd_busaddr = 0;
1145 #if (BYTE_ORDER == BIG_ENDIAN)
1146         else {
1147                 cmd_busaddr = ((cmd_busaddr >> 24) & 0xFF)
1148                             | ((cmd_busaddr >> 16) & 0xFF)
1149                             | ((cmd_busaddr >> 8) & 0xFF)
1150                             | (cmd_busaddr & 0xFF);
1151         }
1152 #endif
1153         /* And now the address */
1154         dpt_outl(dpt, HA_WDMAADDR, cmd_busaddr);
1155
1156         if (command == EATA_CMD_IMMEDIATE) {
1157                 if (cmd_block == NULL) {
1158                         dpt_outb(dpt, HA_WCODE2, code2);
1159                         dpt_outb(dpt, HA_WCODE, code);
1160                 }
1161                 dpt_outb(dpt, HA_WIFC, ifc);
1162         }
1163         dpt_outb(dpt, HA_WCOMMAND, command);
1164
1165         return (0);
1166 }
1167
1168
1169 /* ==================== Exported Function definitions =======================*/
1170 dpt_softc_t *
1171 dpt_alloc(device_t dev, bus_space_tag_t tag, bus_space_handle_t bsh)
1172 {
1173         dpt_softc_t     *dpt = device_get_softc(dev);
1174         int    i;
1175
1176         bzero(dpt, sizeof(dpt_softc_t));
1177         dpt->tag = tag;
1178         dpt->bsh = bsh;
1179         dpt->unit = device_get_unit(dev);
1180         SLIST_INIT(&dpt->free_dccb_list);
1181         LIST_INIT(&dpt->pending_ccb_list);
1182         TAILQ_INSERT_TAIL(&dpt_softcs, dpt, links);
1183         for (i = 0; i < MAX_CHANNELS; i++)
1184                 dpt->resetlevel[i] = DPT_HA_OK;
1185
1186 #ifdef DPT_MEASURE_PERFORMANCE
1187         dpt_reset_performance(dpt);
1188 #endif /* DPT_MEASURE_PERFORMANCE */
1189         return (dpt);
1190 }
1191
1192 void
1193 dpt_free(struct dpt_softc *dpt)
1194 {
1195         switch (dpt->init_level) {
1196         default:
1197         case 5:
1198                 bus_dmamap_unload(dpt->dccb_dmat, dpt->dccb_dmamap);
1199         case 4:
1200                 bus_dmamem_free(dpt->dccb_dmat, dpt->dpt_dccbs,
1201                                 dpt->dccb_dmamap);
1202                 bus_dmamap_destroy(dpt->dccb_dmat, dpt->dccb_dmamap);
1203         case 3:
1204                 bus_dma_tag_destroy(dpt->dccb_dmat);
1205         case 2:
1206                 bus_dma_tag_destroy(dpt->buffer_dmat);
1207         case 1:
1208         {
1209                 struct sg_map_node *sg_map;
1210
1211                 while ((sg_map = SLIST_FIRST(&dpt->sg_maps)) != NULL) {
1212                         SLIST_REMOVE_HEAD(&dpt->sg_maps, links);
1213                         bus_dmamap_unload(dpt->sg_dmat,
1214                                           sg_map->sg_dmamap);
1215                         bus_dmamem_free(dpt->sg_dmat, sg_map->sg_vaddr,
1216                                         sg_map->sg_dmamap);
1217                         free(sg_map, M_DEVBUF);
1218                 }
1219                 bus_dma_tag_destroy(dpt->sg_dmat);
1220         }
1221         case 0:
1222                 break;
1223         }
1224         TAILQ_REMOVE(&dpt_softcs, dpt, links);
1225 }
1226
1227 static u_int8_t string_sizes[] =
1228 {
1229         sizeof(((dpt_inq_t*)NULL)->vendor),
1230         sizeof(((dpt_inq_t*)NULL)->modelNum),
1231         sizeof(((dpt_inq_t*)NULL)->firmware),
1232         sizeof(((dpt_inq_t*)NULL)->protocol),
1233 };
1234
1235 int
1236 dpt_init(struct dpt_softc *dpt)
1237 {
1238         dpt_conf_t  conf;
1239         struct      sg_map_node *sg_map;
1240         dpt_ccb_t  *dccb;
1241         u_int8_t   *strp;
1242         int         index;
1243         int         i;
1244         int         retval;
1245
1246         dpt->init_level = 0;
1247         SLIST_INIT(&dpt->sg_maps);
1248
1249 #ifdef DPT_RESET_BOARD
1250         printf("dpt%d: resetting HBA\n", dpt->unit);
1251         dpt_outb(dpt, HA_WCOMMAND, EATA_CMD_RESET);
1252         DELAY(750000);
1253         /* XXX Shouldn't we poll a status register or something??? */
1254 #endif
1255         /* DMA tag for our S/G structures.  We allocate in page sized chunks */
1256         if (bus_dma_tag_create(dpt->parent_dmat, /*alignment*/1, /*boundary*/0,
1257                                /*lowaddr*/BUS_SPACE_MAXADDR,
1258                                /*highaddr*/BUS_SPACE_MAXADDR,
1259                                /*filter*/NULL, /*filterarg*/NULL,
1260                                PAGE_SIZE, /*nsegments*/1,
1261                                /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
1262                                /*flags*/0, &dpt->sg_dmat) != 0) {
1263                 goto error_exit;
1264         }
1265
1266         dpt->init_level++;
1267
1268         /*
1269          * We allocate our DPT ccbs as a contiguous array of bus dma'able
1270          * memory.  To get the allocation size, we need to know how many
1271          * ccbs the card supports.  This requires a ccb.  We solve this
1272          * chicken and egg problem by allocating some re-usable S/G space
1273          * up front, and treating it as our status packet, CCB, and target
1274          * memory space for these commands.
1275          */
1276         sg_map = dptallocsgmap(dpt);
1277         if (sg_map == NULL)
1278                 goto error_exit;
1279
1280         dpt->sp = (volatile dpt_sp_t *)sg_map->sg_vaddr;
1281         dccb = (struct dpt_ccb *)(uintptr_t)(volatile void *)&dpt->sp[1];
1282         bzero(dccb, sizeof(*dccb));
1283         dpt->sp_physaddr = sg_map->sg_physaddr;
1284         dccb->eata_ccb.cp_dataDMA =
1285             htonl(sg_map->sg_physaddr + sizeof(dpt_sp_t) + sizeof(*dccb));
1286         dccb->eata_ccb.cp_busaddr = ~0;
1287         dccb->eata_ccb.cp_statDMA = htonl(dpt->sp_physaddr);
1288         dccb->eata_ccb.cp_reqDMA = htonl(dpt->sp_physaddr + sizeof(*dccb)
1289                                        + offsetof(struct dpt_ccb, sense_data));
1290
1291         /* Okay.  Fetch our config */
1292         bzero(&dccb[1], sizeof(conf)); /* data area */
1293         retval = dpt_get_conf(dpt, dccb, sg_map->sg_physaddr + sizeof(dpt_sp_t),
1294                               sizeof(conf), 0xc1, 7, 1);
1295
1296         if (retval != 0) {
1297                 printf("dpt%d: Failed to get board configuration\n", dpt->unit);
1298                 return (retval);
1299         }
1300         bcopy(&dccb[1], &conf, sizeof(conf));
1301
1302         bzero(&dccb[1], sizeof(dpt->board_data));
1303         retval = dpt_get_conf(dpt, dccb, sg_map->sg_physaddr + sizeof(dpt_sp_t),
1304                               sizeof(dpt->board_data), 0, conf.scsi_id0, 0);
1305         if (retval != 0) {
1306                 printf("dpt%d: Failed to get inquiry information\n", dpt->unit);
1307                 return (retval);
1308         }
1309         bcopy(&dccb[1], &dpt->board_data, sizeof(dpt->board_data));
1310
1311         dpt_detect_cache(dpt, dccb, sg_map->sg_physaddr + sizeof(dpt_sp_t),
1312                          (u_int8_t *)&dccb[1]);
1313
1314         switch (ntohl(conf.splen)) {
1315         case DPT_EATA_REVA:
1316                 dpt->EATA_revision = 'a';
1317                 break;
1318         case DPT_EATA_REVB:
1319                 dpt->EATA_revision = 'b';
1320                 break;
1321         case DPT_EATA_REVC:
1322                 dpt->EATA_revision = 'c';
1323                 break;
1324         case DPT_EATA_REVZ:
1325                 dpt->EATA_revision = 'z';
1326                 break;
1327         default:
1328                 dpt->EATA_revision = '?';
1329         }
1330
1331         dpt->max_id      = conf.MAX_ID;
1332         dpt->max_lun     = conf.MAX_LUN;
1333         dpt->irq         = conf.IRQ;
1334         dpt->dma_channel = (8 - conf.DMA_channel) & 7;
1335         dpt->channels    = conf.MAX_CHAN + 1;
1336         dpt->state      |= DPT_HA_OK;
1337         if (conf.SECOND)
1338                 dpt->primary = FALSE;
1339         else
1340                 dpt->primary = TRUE;
1341
1342         dpt->more_support = conf.MORE_support;
1343
1344         if (strncmp(dpt->board_data.firmware, "07G0", 4) >= 0)
1345                 dpt->immediate_support = 1;
1346         else
1347                 dpt->immediate_support = 0;
1348
1349         dpt->broken_INQUIRY = FALSE;
1350
1351         dpt->cplen = ntohl(conf.cplen);
1352         dpt->cppadlen = ntohs(conf.cppadlen);
1353         dpt->max_dccbs = ntohs(conf.queuesiz);
1354
1355         if (dpt->max_dccbs > 256) {
1356                 printf("dpt%d: Max CCBs reduced from %d to "
1357                        "256 due to tag algorithm\n", dpt->unit, dpt->max_dccbs);
1358                 dpt->max_dccbs = 256;
1359         }
1360
1361         dpt->hostid[0] = conf.scsi_id0;
1362         dpt->hostid[1] = conf.scsi_id1;
1363         dpt->hostid[2] = conf.scsi_id2;
1364
1365         if (conf.SG_64K)
1366                 dpt->sgsize = 8192;
1367         else
1368                 dpt->sgsize = ntohs(conf.SGsiz);
1369
1370         /* We can only get 64k buffers, so don't bother to waste space. */
1371         if (dpt->sgsize < 17 || dpt->sgsize > 32)
1372                 dpt->sgsize = 32; 
1373
1374         if (dpt->sgsize > dpt_max_segs)
1375                 dpt->sgsize = dpt_max_segs;
1376         
1377         /* DMA tag for mapping buffers into device visible space. */
1378         if (bus_dma_tag_create(dpt->parent_dmat, /*alignment*/1, /*boundary*/0,
1379                                /*lowaddr*/BUS_SPACE_MAXADDR,
1380                                /*highaddr*/BUS_SPACE_MAXADDR,
1381                                /*filter*/NULL, /*filterarg*/NULL,
1382                                /*maxsize*/MAXBSIZE, /*nsegments*/dpt->sgsize,
1383                                /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
1384                                /*flags*/BUS_DMA_ALLOCNOW,
1385                                &dpt->buffer_dmat) != 0) {
1386                 printf("dpt: bus_dma_tag_create(...,dpt->buffer_dmat) failed\n");
1387                 goto error_exit;
1388         }
1389
1390         dpt->init_level++;
1391
1392         /* DMA tag for our ccb structures and interrupt status packet */
1393         if (bus_dma_tag_create(dpt->parent_dmat, /*alignment*/1, /*boundary*/0,
1394                                /*lowaddr*/BUS_SPACE_MAXADDR,
1395                                /*highaddr*/BUS_SPACE_MAXADDR,
1396                                /*filter*/NULL, /*filterarg*/NULL,
1397                                (dpt->max_dccbs * sizeof(struct dpt_ccb))
1398                                + sizeof(dpt_sp_t),
1399                                /*nsegments*/1,
1400                                /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
1401                                /*flags*/0, &dpt->dccb_dmat) != 0) {
1402                 printf("dpt: bus_dma_tag_create(...,dpt->dccb_dmat) failed\n");
1403                 goto error_exit;
1404         }
1405
1406         dpt->init_level++;
1407
1408         /* Allocation for our ccbs and interrupt status packet */
1409         if (bus_dmamem_alloc(dpt->dccb_dmat, (void **)&dpt->dpt_dccbs,
1410                              BUS_DMA_NOWAIT, &dpt->dccb_dmamap) != 0) {
1411                 printf("dpt: bus_dmamem_alloc(dpt->dccb_dmat,...) failed\n");
1412                 goto error_exit;
1413         }
1414
1415         dpt->init_level++;
1416
1417         /* And permanently map them */
1418         bus_dmamap_load(dpt->dccb_dmat, dpt->dccb_dmamap,
1419                         dpt->dpt_dccbs,
1420                         (dpt->max_dccbs * sizeof(struct dpt_ccb))
1421                         + sizeof(dpt_sp_t),
1422                         dptmapmem, &dpt->dpt_ccb_busbase, /*flags*/0);
1423
1424         /* Clear them out. */
1425         bzero(dpt->dpt_dccbs,
1426               (dpt->max_dccbs * sizeof(struct dpt_ccb)) + sizeof(dpt_sp_t));
1427
1428         dpt->dpt_ccb_busend = dpt->dpt_ccb_busbase;
1429
1430         dpt->sp = (dpt_sp_t*)&dpt->dpt_dccbs[dpt->max_dccbs];
1431         dpt->sp_physaddr = dpt->dpt_ccb_busbase
1432                          + (dpt->max_dccbs * sizeof(dpt_ccb_t));
1433         dpt->init_level++;
1434
1435         /* Allocate our first batch of ccbs */
1436         if (dptallocccbs(dpt) == 0) {
1437                 printf("dpt: dptallocccbs(dpt) == 0\n");
1438                 return (2);
1439         }
1440
1441         /* Prepare for Target Mode */
1442         dpt->target_mode_enabled = 1;
1443
1444         /* Nuke excess spaces from inquiry information */
1445         strp = dpt->board_data.vendor;
1446         for (i = 0; i < sizeof(string_sizes); i++) {
1447                 index = string_sizes[i] - 1;    
1448                 while (index && (strp[index] == ' '))
1449                         strp[index--] = '\0';
1450                 strp += string_sizes[i];
1451         }
1452
1453         printf("dpt%d: %.8s %.16s FW Rev. %.4s, ",
1454                dpt->unit, dpt->board_data.vendor,
1455                dpt->board_data.modelNum, dpt->board_data.firmware);
1456
1457         printf("%d channel%s, ", dpt->channels, dpt->channels > 1 ? "s" : "");
1458
1459         if (dpt->cache_type != DPT_NO_CACHE
1460          && dpt->cache_size != 0) {
1461                 printf("%s Cache, ",
1462                        dpt->cache_type == DPT_CACHE_WRITETHROUGH
1463                      ? "Write-Through" : "Write-Back");
1464         }
1465
1466         printf("%d CCBs\n", dpt->max_dccbs);
1467         return (0);
1468                 
1469 error_exit:
1470         return (1);
1471 }
1472
1473 int
1474 dpt_attach(dpt_softc_t *dpt)
1475 {
1476         struct cam_devq *devq;
1477         int i;
1478
1479         /*
1480          * Create the device queue for our SIM.
1481          */
1482         devq = cam_simq_alloc(dpt->max_dccbs);
1483         if (devq == NULL)
1484                 return (0);
1485
1486         for (i = 0; i < dpt->channels; i++) {
1487                 /*
1488                  * Construct our SIM entry
1489                  */
1490                 dpt->sims[i] = cam_sim_alloc(dpt_action, dpt_poll, "dpt",
1491                                              dpt, dpt->unit, /*untagged*/2,
1492                                              /*tagged*/dpt->max_dccbs, devq);
1493                 if (xpt_bus_register(dpt->sims[i], i) != CAM_SUCCESS) {
1494                         cam_sim_free(dpt->sims[i]);
1495                         break;
1496                 }
1497
1498                 if (xpt_create_path(&dpt->paths[i], /*periph*/NULL,
1499                                     cam_sim_path(dpt->sims[i]),
1500                                     CAM_TARGET_WILDCARD,
1501                                     CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
1502                         xpt_bus_deregister(cam_sim_path(dpt->sims[i]));
1503                         cam_sim_free(dpt->sims[i]);
1504                         break;
1505                 }
1506
1507         }
1508         cam_simq_release(devq);
1509         if (i > 0)
1510                 EVENTHANDLER_REGISTER(shutdown_final, dptshutdown,
1511                                       dpt, SHUTDOWN_PRI_DEFAULT);
1512         return (i);
1513 }
1514
1515
1516 /*
1517  * This is the interrupt handler for the DPT driver.
1518  */
1519 void
1520 dpt_intr(void *arg)
1521 {
1522         dpt_softc_t    *dpt;
1523         dpt_ccb_t      *dccb;
1524         union ccb      *ccb;
1525         u_int           status;
1526         u_int           aux_status;
1527         u_int           hba_stat;
1528         u_int           scsi_stat;
1529         u_int32_t       residue_len;    /* Number of bytes not transferred */
1530
1531         dpt = (dpt_softc_t *)arg;
1532
1533         /* First order of business is to check if this interrupt is for us */
1534         while (((aux_status = dpt_inb(dpt, HA_RAUXSTAT)) & HA_AIRQ) != 0) {
1535
1536                 /*
1537                  * What we want to do now, is to capture the status, all of it,
1538                  * move it where it belongs, wake up whoever sleeps waiting to
1539                  * process this result, and get out of here.
1540                  */
1541                 if (dpt->sp->ccb_busaddr < dpt->dpt_ccb_busbase
1542                  || dpt->sp->ccb_busaddr >= dpt->dpt_ccb_busend) {
1543                         printf("Encountered bogus status packet\n");
1544                         status = dpt_inb(dpt, HA_RSTATUS);
1545                         return;
1546                 }
1547
1548                 dccb = dptccbptov(dpt, dpt->sp->ccb_busaddr);
1549
1550                 dpt->sp->ccb_busaddr = ~0;
1551
1552                 /* Ignore status packets with EOC not set */
1553                 if (dpt->sp->EOC == 0) {
1554                         printf("dpt%d ERROR: Request %d received with "
1555                                "clear EOC.\n     Marking as LOST.\n",
1556                                dpt->unit, dccb->transaction_id);
1557
1558 #ifdef DPT_HANDLE_TIMEOUTS
1559                         dccb->state |= DPT_CCB_STATE_MARKED_LOST;
1560 #endif
1561                         /* This CLEARS the interrupt! */
1562                         status = dpt_inb(dpt, HA_RSTATUS);
1563                         continue;
1564                 }
1565                 dpt->sp->EOC = 0;
1566
1567                 /*
1568                  * Double buffer the status information so the hardware can
1569                  * work on updating the status packet while we decifer the
1570                  * one we were just interrupted for.
1571                  * According to Mark Salyzyn, we only need few pieces of it.
1572                  */
1573                 hba_stat = dpt->sp->hba_stat;
1574                 scsi_stat = dpt->sp->scsi_stat;
1575                 residue_len = dpt->sp->residue_len;
1576
1577                 /* Clear interrupts, check for error */
1578                 if ((status = dpt_inb(dpt, HA_RSTATUS)) & HA_SERROR) {
1579                         /*
1580                          * Error Condition. Check for magic cookie. Exit
1581                          * this test on earliest sign of non-reset condition
1582                          */
1583
1584                         /* Check that this is not a board reset interrupt */
1585                         if (dpt_just_reset(dpt)) {
1586                                 printf("dpt%d: HBA rebooted.\n"
1587                                        "      All transactions should be "
1588                                        "resubmitted\n",
1589                                        dpt->unit);
1590
1591                                 printf("dpt%d: >>---->>  This is incomplete, "
1592                                        "fix me....  <<----<<", dpt->unit);
1593                                 panic("DPT Rebooted");
1594
1595                         }
1596                 }
1597                 /* Process CCB */
1598                 ccb = dccb->ccb;
1599                 untimeout(dpttimeout, dccb, ccb->ccb_h.timeout_ch);
1600                 if ((ccb->ccb_h.flags & CAM_DIR_MASK) != CAM_DIR_NONE) {
1601                         bus_dmasync_op_t op;
1602
1603                         if ((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN)
1604                                 op = BUS_DMASYNC_POSTREAD;
1605                         else
1606                                 op = BUS_DMASYNC_POSTWRITE;
1607                         bus_dmamap_sync(dpt->buffer_dmat, dccb->dmamap, op);
1608                         bus_dmamap_unload(dpt->buffer_dmat, dccb->dmamap);
1609                 }
1610
1611                 /* Common Case inline... */
1612                 if (hba_stat == HA_NO_ERROR) {
1613                         ccb->csio.scsi_status = scsi_stat;
1614                         ccb->ccb_h.status = 0;
1615                         switch (scsi_stat) {
1616                         case SCSI_STATUS_OK:
1617                                 ccb->ccb_h.status |= CAM_REQ_CMP;
1618                                 break;
1619                         case SCSI_STATUS_CHECK_COND:
1620                         case SCSI_STATUS_CMD_TERMINATED:
1621                                 bcopy(&dccb->sense_data, &ccb->csio.sense_data,
1622                                       ccb->csio.sense_len);
1623                                 ccb->ccb_h.status |= CAM_AUTOSNS_VALID;
1624                                 /* FALLTHROUGH */
1625                         default:
1626                                 ccb->ccb_h.status |= CAM_SCSI_STATUS_ERROR;
1627                                 /* XXX Freeze DevQ */
1628                                 break;
1629                         }
1630                         ccb->csio.resid = residue_len;
1631                         dptfreeccb(dpt, dccb);
1632                         xpt_done(ccb);
1633                 } else {
1634                         dptprocesserror(dpt, dccb, ccb, hba_stat, scsi_stat,
1635                                         residue_len);
1636                 }
1637         }
1638 }
1639
1640 static void
1641 dptprocesserror(dpt_softc_t *dpt, dpt_ccb_t *dccb, union ccb *ccb,
1642                 u_int hba_stat, u_int scsi_stat, u_int32_t resid)
1643 {
1644         ccb->csio.resid = resid;
1645         switch (hba_stat) {
1646         case HA_ERR_SEL_TO:
1647                 ccb->ccb_h.status = CAM_SEL_TIMEOUT;
1648                 break;
1649         case HA_ERR_CMD_TO:
1650                 ccb->ccb_h.status = CAM_CMD_TIMEOUT;
1651                 break;
1652         case HA_SCSIBUS_RESET:
1653         case HA_HBA_POWER_UP:   /* Similar effect to a bus reset??? */
1654                 ccb->ccb_h.status = CAM_SCSI_BUS_RESET;
1655                 break;
1656         case HA_CP_ABORTED:
1657         case HA_CP_RESET:       /* XXX ??? */
1658         case HA_CP_ABORT_NA:    /* XXX ??? */
1659         case HA_CP_RESET_NA:    /* XXX ??? */
1660                 if ((ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_INPROG)
1661                         ccb->ccb_h.status = CAM_REQ_ABORTED;
1662                 break;
1663         case HA_PCI_PARITY:
1664         case HA_PCI_MABORT:
1665         case HA_PCI_TABORT:
1666         case HA_PCI_STABORT:
1667         case HA_BUS_PARITY:
1668         case HA_PARITY_ERR:
1669         case HA_ECC_ERR:
1670                 ccb->ccb_h.status = CAM_UNCOR_PARITY;
1671                 break;
1672         case HA_UNX_MSGRJCT:
1673                 ccb->ccb_h.status = CAM_MSG_REJECT_REC;
1674                 break;
1675         case HA_UNX_BUSPHASE:
1676                 ccb->ccb_h.status = CAM_SEQUENCE_FAIL;
1677                 break;
1678         case HA_UNX_BUS_FREE:
1679                 ccb->ccb_h.status = CAM_UNEXP_BUSFREE;
1680                 break;
1681         case HA_SCSI_HUNG:
1682         case HA_RESET_STUCK:
1683                 /*
1684                  * Dead???  Can the controller get unstuck
1685                  * from these conditions
1686                  */
1687                 ccb->ccb_h.status = CAM_NO_HBA;
1688                 break;
1689         case HA_RSENSE_FAIL:
1690                 ccb->ccb_h.status = CAM_AUTOSENSE_FAIL;
1691                 break;
1692         default:
1693                 printf("dpt%d: Undocumented Error %x\n", dpt->unit, hba_stat);
1694                 printf("Please mail this message to shimon@simon-shapiro.org\n");
1695                 ccb->ccb_h.status = CAM_REQ_CMP_ERR;
1696                 break;
1697         }
1698         dptfreeccb(dpt, dccb);
1699         xpt_done(ccb);
1700 }
1701
1702 static void
1703 dpttimeout(void *arg)
1704 {
1705         struct dpt_ccb   *dccb;
1706         union  ccb       *ccb;
1707         struct dpt_softc *dpt;
1708         int               s;
1709
1710         dccb = (struct dpt_ccb *)arg;
1711         ccb = dccb->ccb;
1712         dpt = (struct dpt_softc *)ccb->ccb_h.ccb_dpt_ptr;
1713         xpt_print_path(ccb->ccb_h.path);
1714         printf("CCB %p - timed out\n", (void *)dccb);
1715
1716         s = splcam();
1717
1718         /*
1719          * Try to clear any pending jobs.  FreeBSD will loose interrupts,
1720          * leaving the controller suspended, and commands timed-out.
1721          * By calling the interrupt handler, any command thus stuck will be
1722          * completed.
1723          */
1724         dpt_intr(dpt);
1725         
1726         if ((dccb->state & DCCB_ACTIVE) == 0) {
1727                 xpt_print_path(ccb->ccb_h.path);
1728                 printf("CCB %p - timed out CCB already completed\n",
1729                        (void *)dccb);
1730                 splx(s);
1731                 return;
1732         }
1733
1734         /* Abort this particular command.  Leave all others running */
1735         dpt_send_immediate(dpt, &dccb->eata_ccb, dccb->eata_ccb.cp_busaddr,
1736                            /*retries*/20000, EATA_SPECIFIC_ABORT, 0, 0);
1737         ccb->ccb_h.status = CAM_CMD_TIMEOUT;
1738         splx(s);
1739 }
1740
1741 /*
1742  * Shutdown the controller and ensure that the cache is completely flushed.
1743  * Called from the shutdown_final event after all disk access has completed.
1744  */
1745 static void
1746 dptshutdown(void *arg, int howto)
1747 {
1748         dpt_softc_t *dpt;
1749
1750         dpt = (dpt_softc_t *)arg;
1751
1752         printf("dpt%d: Shutting down (mode %x) HBA.     Please wait...\n",
1753                dpt->unit, howto);
1754
1755         /*
1756          * What we do for a shutdown, is give the DPT early power loss warning
1757          */
1758         dpt_send_immediate(dpt, NULL, 0, EATA_POWER_OFF_WARN, 0, 0, 0);
1759         DELAY(1000 * 1000 * 5);
1760         printf("dpt%d: Controller was warned of shutdown and is now "
1761                "disabled\n", dpt->unit);
1762 }
1763
1764 /*============================================================================*/
1765
1766 #if 0
1767 #ifdef DPT_RESET_HBA
1768
1769 /*
1770 **      Function name : dpt_reset_hba
1771 **
1772 **      Description : Reset the HBA and properly discard all pending work
1773 **      Input :       Softc
1774 **      Output :      Nothing
1775 */
1776 static void
1777 dpt_reset_hba(dpt_softc_t *dpt)
1778 {
1779         eata_ccb_t       *ccb;
1780         int               ospl;
1781         dpt_ccb_t         dccb, *dccbp;
1782         int               result;
1783         struct scsi_xfer *xs;
1784     
1785         /* Prepare a control block.  The SCSI command part is immaterial */
1786         dccb.xs = NULL;
1787         dccb.flags = 0;
1788         dccb.state = DPT_CCB_STATE_NEW;
1789         dccb.std_callback = NULL;
1790         dccb.wrbuff_callback = NULL;
1791
1792         ccb = &dccb.eata_ccb;
1793         ccb->CP_OpCode = EATA_CMD_RESET;
1794         ccb->SCSI_Reset = 0;
1795         ccb->HBA_Init = 1;
1796         ccb->Auto_Req_Sen = 1;
1797         ccb->cp_id = 0; /* Should be ignored */
1798         ccb->DataIn = 1;
1799         ccb->DataOut = 0;
1800         ccb->Interpret = 1;
1801         ccb->reqlen = htonl(sizeof(struct scsi_sense_data));
1802         ccb->cp_statDMA = htonl(vtophys(&ccb->cp_statDMA));
1803         ccb->cp_reqDMA = htonl(vtophys(&ccb->cp_reqDMA));
1804         ccb->cp_viraddr = (u_int32_t) & ccb;
1805
1806         ccb->cp_msg[0] = HA_IDENTIFY_MSG | HA_DISCO_RECO;
1807         ccb->cp_scsi_cmd = 0;  /* Should be ignored */
1808
1809         /* Lock up the submitted queue.  We are very persistant here */
1810         ospl = splcam();
1811         while (dpt->queue_status & DPT_SUBMITTED_QUEUE_ACTIVE) {
1812                 DELAY(100);
1813         }
1814         
1815         dpt->queue_status |= DPT_SUBMITTED_QUEUE_ACTIVE;
1816         splx(ospl);
1817
1818         /* Send the RESET message */
1819         if ((result = dpt_send_eata_command(dpt, &dccb.eata_ccb,
1820                                             EATA_CMD_RESET, 0, 0, 0, 0)) != 0) {
1821                 printf("dpt%d: Failed to send the RESET message.\n"
1822                        "      Trying cold boot (ouch!)\n", dpt->unit);
1823         
1824         
1825                 if ((result = dpt_send_eata_command(dpt, &dccb.eata_ccb,
1826                                                     EATA_COLD_BOOT, 0, 0,
1827                                                     0, 0)) != 0) {
1828                         panic("dpt%d:  Faild to cold boot the HBA\n",
1829                               dpt->unit);
1830                 }
1831 #ifdef DPT_MEASURE_PERFORMANCE
1832                 dpt->performance.cold_boots++;
1833 #endif /* DPT_MEASURE_PERFORMANCE */
1834         }
1835         
1836 #ifdef DPT_MEASURE_PERFORMANCE
1837         dpt->performance.warm_starts++;
1838 #endif /* DPT_MEASURE_PERFORMANCE */
1839         
1840         printf("dpt%d:  Aborting pending requests.  O/S should re-submit\n",
1841                dpt->unit);
1842
1843         while ((dccbp = TAILQ_FIRST(&dpt->completed_ccbs)) != NULL) {
1844                 struct scsi_xfer *xs = dccbp->xs;
1845             
1846                 /* Not all transactions have xs structs */
1847                 if (xs != NULL) {
1848                         /* Tell the kernel proper this did not complete well */
1849                         xs->error |= XS_SELTIMEOUT;
1850                         xs->flags |= SCSI_ITSDONE;
1851                         scsi_done(xs);
1852                 }
1853             
1854                 dpt_Qremove_submitted(dpt, dccbp);
1855         
1856                 /* Remember, Callbacks are NOT in the standard queue */
1857                 if (dccbp->std_callback != NULL) {
1858                         (dccbp->std_callback)(dpt, dccbp->eata_ccb.cp_channel,
1859                                                dccbp);
1860                 } else {
1861                         ospl = splcam();
1862                         dpt_Qpush_free(dpt, dccbp);
1863                         splx(ospl);
1864                 }
1865         }
1866
1867         printf("dpt%d: reset done aborting all pending commands\n", dpt->unit);
1868         dpt->queue_status &= ~DPT_SUBMITTED_QUEUE_ACTIVE;
1869 }
1870
1871 #endif /* DPT_RESET_HBA */ 
1872
1873 /*
1874  * Build a Command Block for target mode READ/WRITE BUFFER,
1875  * with the ``sync'' bit ON.
1876  *
1877  * Although the length and offset are 24 bit fields in the command, they cannot
1878  * exceed 8192 bytes, so we take them as short integers andcheck their range.
1879  * If they are sensless, we round them to zero offset, maximum length and
1880  * complain.
1881  */
1882
1883 static void
1884 dpt_target_ccb(dpt_softc_t * dpt, int bus, u_int8_t target, u_int8_t lun,
1885                dpt_ccb_t * ccb, int mode, u_int8_t command,
1886                u_int16_t length, u_int16_t offset)
1887 {
1888         eata_ccb_t     *cp;
1889         int             ospl;
1890
1891         if ((length + offset) > DPT_MAX_TARGET_MODE_BUFFER_SIZE) {
1892                 printf("dpt%d:  Length of %d, and offset of %d are wrong\n",
1893                        dpt->unit, length, offset);
1894                 length = DPT_MAX_TARGET_MODE_BUFFER_SIZE;
1895                 offset = 0;
1896         }
1897         ccb->xs = NULL;
1898         ccb->flags = 0;
1899         ccb->state = DPT_CCB_STATE_NEW;
1900         ccb->std_callback = (ccb_callback) dpt_target_done;
1901         ccb->wrbuff_callback = NULL;
1902
1903         cp = &ccb->eata_ccb;
1904         cp->CP_OpCode = EATA_CMD_DMA_SEND_CP;
1905         cp->SCSI_Reset = 0;
1906         cp->HBA_Init = 0;
1907         cp->Auto_Req_Sen = 1;
1908         cp->cp_id = target;
1909         cp->DataIn = 1;
1910         cp->DataOut = 0;
1911         cp->Interpret = 0;
1912         cp->reqlen = htonl(sizeof(struct scsi_sense_data));
1913         cp->cp_statDMA = htonl(vtophys(&cp->cp_statDMA));
1914         cp->cp_reqDMA = htonl(vtophys(&cp->cp_reqDMA));
1915         cp->cp_viraddr = (u_int32_t) & ccb;
1916
1917         cp->cp_msg[0] = HA_IDENTIFY_MSG | HA_DISCO_RECO;
1918
1919         cp->cp_scsi_cmd = command;
1920         cp->cp_cdb[1] = (u_int8_t) (mode & SCSI_TM_MODE_MASK);
1921         cp->cp_lun = lun;       /* Order is important here! */
1922         cp->cp_cdb[2] = 0x00;   /* Buffer Id, only 1 :-( */
1923         cp->cp_cdb[3] = (length >> 16) & 0xFF;  /* Buffer offset MSB */
1924         cp->cp_cdb[4] = (length >> 8) & 0xFF;
1925         cp->cp_cdb[5] = length & 0xFF;
1926         cp->cp_cdb[6] = (length >> 16) & 0xFF;  /* Length MSB */
1927         cp->cp_cdb[7] = (length >> 8) & 0xFF;
1928         cp->cp_cdb[8] = length & 0xFF;  /* Length LSB */
1929         cp->cp_cdb[9] = 0;      /* No sync, no match bits */
1930
1931         /*
1932          * This could be optimized to live in dpt_register_buffer.
1933          * We keep it here, just in case the kernel decides to reallocate pages
1934          */
1935         if (dpt_scatter_gather(dpt, ccb, DPT_RW_BUFFER_SIZE,
1936                                dpt->rw_buffer[bus][target][lun])) {
1937                 printf("dpt%d: Failed to setup Scatter/Gather for "
1938                        "Target-Mode buffer\n", dpt->unit);
1939         }
1940 }
1941
1942 /* Setup a target mode READ command */
1943
1944 static void
1945 dpt_set_target(int redo, dpt_softc_t * dpt,
1946                u_int8_t bus, u_int8_t target, u_int8_t lun, int mode,
1947                u_int16_t length, u_int16_t offset, dpt_ccb_t * ccb)
1948 {
1949         int ospl;
1950
1951         if (dpt->target_mode_enabled) {
1952                 ospl = splcam();
1953
1954                 if (!redo)
1955                         dpt_target_ccb(dpt, bus, target, lun, ccb, mode,
1956                                        SCSI_TM_READ_BUFFER, length, offset);
1957
1958                 ccb->transaction_id = ++dpt->commands_processed;
1959
1960 #ifdef DPT_MEASURE_PERFORMANCE
1961                 dpt->performance.command_count[ccb->eata_ccb.cp_scsi_cmd]++;
1962                 ccb->command_started = microtime_now;
1963 #endif
1964                 dpt_Qadd_waiting(dpt, ccb);
1965                 dpt_sched_queue(dpt);
1966
1967                 splx(ospl);
1968         } else {
1969                 printf("dpt%d:  Target Mode Request, but Target Mode is OFF\n",
1970                        dpt->unit);
1971         }
1972 }
1973
1974 /*
1975  * Schedule a buffer to be sent to another target.
1976  * The work will be scheduled and the callback provided will be called when
1977  * the work is actually done.
1978  *
1979  * Please NOTE:  ``Anyone'' can send a buffer, but only registered clients
1980  * get notified of receipt of buffers.
1981  */
1982
1983 int
1984 dpt_send_buffer(int unit, u_int8_t channel, u_int8_t target, u_int8_t lun,
1985                 u_int8_t mode, u_int16_t length, u_int16_t offset, void *data,
1986                 buff_wr_done callback)
1987 {
1988         dpt_softc_t    *dpt;
1989         dpt_ccb_t      *ccb = NULL;
1990         int             ospl;
1991
1992         /* This is an external call.  Be a bit paranoid */
1993         for (dpt = TAILQ_FIRST(&dpt_softc_list);
1994              dpt != NULL;
1995              dpt = TAILQ_NEXT(dpt, links)) {
1996                 if (dpt->unit == unit)
1997                         goto valid_unit;
1998         }
1999
2000         return (INVALID_UNIT);
2001
2002 valid_unit:
2003
2004         if (dpt->target_mode_enabled) {
2005                 if ((channel >= dpt->channels) || (target > dpt->max_id) ||
2006                     (lun > dpt->max_lun)) {
2007                         return (INVALID_SENDER);
2008                 }
2009                 if ((dpt->rw_buffer[channel][target][lun] == NULL) ||
2010                     (dpt->buffer_receiver[channel][target][lun] == NULL))
2011                         return (NOT_REGISTERED);
2012
2013                 ospl = splsoftcam();
2014                 /* Process the free list */
2015                 if ((TAILQ_EMPTY(&dpt->free_ccbs)) && dpt_alloc_freelist(dpt)) {
2016                         printf("dpt%d ERROR: Cannot allocate any more free CCB's.\n"
2017                                "             Please try later\n",
2018                                dpt->unit);
2019                         splx(ospl);
2020                         return (NO_RESOURCES);
2021                 }
2022                 /* Now grab the newest CCB */
2023                 if ((ccb = dpt_Qpop_free(dpt)) == NULL) {
2024                         splx(ospl);
2025                         panic("dpt%d: Got a NULL CCB from pop_free()\n", dpt->unit);
2026                 }
2027                 splx(ospl);
2028
2029                 bcopy(dpt->rw_buffer[channel][target][lun] + offset, data, length);
2030                 dpt_target_ccb(dpt, channel, target, lun, ccb, mode, 
2031                                            SCSI_TM_WRITE_BUFFER,
2032                                            length, offset);
2033                 ccb->std_callback = (ccb_callback) callback; /* Potential trouble */
2034
2035                 ospl = splcam();
2036                 ccb->transaction_id = ++dpt->commands_processed;
2037
2038 #ifdef DPT_MEASURE_PERFORMANCE
2039                 dpt->performance.command_count[ccb->eata_ccb.cp_scsi_cmd]++;
2040                 ccb->command_started = microtime_now;
2041 #endif
2042                 dpt_Qadd_waiting(dpt, ccb);
2043                 dpt_sched_queue(dpt);
2044
2045                 splx(ospl);
2046                 return (0);
2047         }
2048         return (DRIVER_DOWN);
2049 }
2050
2051 static void
2052 dpt_target_done(dpt_softc_t * dpt, int bus, dpt_ccb_t * ccb)
2053 {
2054         int             ospl;
2055         eata_ccb_t     *cp;
2056
2057         cp = &ccb->eata_ccb;
2058
2059         /*
2060          * Remove the CCB from the waiting queue.
2061          *  We do NOT put it back on the free, etc., queues as it is a special
2062          * ccb, owned by the dpt_softc of this unit.
2063          */
2064         ospl = splsoftcam();
2065         dpt_Qremove_completed(dpt, ccb);
2066         splx(ospl);
2067
2068 #define br_channel           (ccb->eata_ccb.cp_channel)
2069 #define br_target            (ccb->eata_ccb.cp_id)
2070 #define br_lun               (ccb->eata_ccb.cp_LUN)
2071 #define br_index             [br_channel][br_target][br_lun]
2072 #define read_buffer_callback (dpt->buffer_receiver br_index )
2073 #define read_buffer          (dpt->rw_buffer[br_channel][br_target][br_lun])
2074 #define cb(offset)           (ccb->eata_ccb.cp_cdb[offset])
2075 #define br_offset            ((cb(3) << 16) | (cb(4) << 8) | cb(5))
2076 #define br_length            ((cb(6) << 16) | (cb(7) << 8) | cb(8))
2077
2078         /* Different reasons for being here, you know... */
2079         switch (ccb->eata_ccb.cp_scsi_cmd) {
2080         case SCSI_TM_READ_BUFFER:
2081                 if (read_buffer_callback != NULL) {
2082                         /* This is a buffer generated by a kernel process */
2083                         read_buffer_callback(dpt->unit, br_channel,
2084                                              br_target, br_lun,
2085                                              read_buffer,
2086                                              br_offset, br_length);
2087                 } else {
2088                         /*
2089                          * This is a buffer waited for by a user (sleeping)
2090                          * command
2091                          */
2092                         wakeup(ccb);
2093                 }
2094
2095                 /* We ALWAYS re-issue the same command; args are don't-care  */
2096                 dpt_set_target(1, 0, 0, 0, 0, 0, 0, 0, 0);
2097                 break;
2098
2099         case SCSI_TM_WRITE_BUFFER:
2100                 (ccb->wrbuff_callback) (dpt->unit, br_channel, br_target,
2101                                         br_offset, br_length,
2102                                         br_lun, ccb->status_packet.hba_stat);
2103                 break;
2104         default:
2105                 printf("dpt%d:  %s is an unsupported command for target mode\n",
2106                        dpt->unit, scsi_cmd_name(ccb->eata_ccb.cp_scsi_cmd));
2107         }
2108         ospl = splsoftcam();
2109         dpt->target_ccb[br_channel][br_target][br_lun] = NULL;
2110         dpt_Qpush_free(dpt, ccb);
2111         splx(ospl);
2112 }
2113
2114
2115 /*
2116  * Use this function to register a client for a buffer read target operation.
2117  * The function you register will be called every time a buffer is received
2118  * by the target mode code.
2119  */
2120 dpt_rb_t
2121 dpt_register_buffer(int unit, u_int8_t channel, u_int8_t target, u_int8_t lun,
2122                     u_int8_t mode, u_int16_t length, u_int16_t offset,
2123                     dpt_rec_buff callback, dpt_rb_op_t op)
2124 {
2125         dpt_softc_t    *dpt;
2126         dpt_ccb_t      *ccb = NULL;
2127         int             ospl;
2128
2129         for (dpt = TAILQ_FIRST(&dpt_softc_list);
2130              dpt != NULL;
2131              dpt = TAILQ_NEXT(dpt, links)) {
2132                 if (dpt->unit == unit)
2133                         goto valid_unit;
2134         }
2135
2136         return (INVALID_UNIT);
2137
2138 valid_unit:
2139
2140         if (dpt->state & DPT_HA_SHUTDOWN_ACTIVE)
2141                 return (DRIVER_DOWN);
2142
2143         if ((channel > (dpt->channels - 1)) || (target > (dpt->max_id - 1)) ||
2144             (lun > (dpt->max_lun - 1)))
2145                 return (INVALID_SENDER);
2146
2147         if (dpt->buffer_receiver[channel][target][lun] == NULL) {
2148                 if (op == REGISTER_BUFFER) {
2149                         /* Assign the requested callback */
2150                         dpt->buffer_receiver[channel][target][lun] = callback;
2151                         /* Get a CCB */
2152                         ospl = splsoftcam();
2153
2154                         /* Process the free list */
2155                         if ((TAILQ_EMPTY(&dpt->free_ccbs)) && dpt_alloc_freelist(dpt)) {
2156                                 printf("dpt%d ERROR: Cannot allocate any more free CCB's.\n"
2157                                        "             Please try later\n",
2158                                        dpt->unit);
2159                                 splx(ospl);
2160                                 return (NO_RESOURCES);
2161                         }
2162                         /* Now grab the newest CCB */
2163                         if ((ccb = dpt_Qpop_free(dpt)) == NULL) {
2164                                 splx(ospl);
2165                                 panic("dpt%d: Got a NULL CCB from pop_free()\n",
2166                                       dpt->unit);
2167                         }
2168                         splx(ospl);
2169
2170                         /* Clean up the leftover of the previous tenant */
2171                         ccb->status = DPT_CCB_STATE_NEW;
2172                         dpt->target_ccb[channel][target][lun] = ccb;
2173
2174                         dpt->rw_buffer[channel][target][lun] =
2175                                 malloc(DPT_RW_BUFFER_SIZE, M_DEVBUF, M_INTWAIT);
2176                         dpt_set_target(0, dpt, channel, target, lun, mode,
2177                                        length, offset, ccb);
2178                         return (SUCCESSFULLY_REGISTERED);
2179                 } else
2180                         return (NOT_REGISTERED);
2181         } else {
2182                 if (op == REGISTER_BUFFER) {
2183                         if (dpt->buffer_receiver[channel][target][lun] == callback)
2184                                 return (ALREADY_REGISTERED);
2185                         else
2186                                 return (REGISTERED_TO_ANOTHER);
2187                 } else {
2188                         if (dpt->buffer_receiver[channel][target][lun] == callback) {
2189                                 dpt->buffer_receiver[channel][target][lun] = NULL;
2190                                 ospl = splsoftcam();
2191                                 dpt_Qpush_free(dpt, ccb);
2192                                 splx(ospl);
2193                                 free(dpt->rw_buffer[channel][target][lun], M_DEVBUF);
2194                                 return (SUCCESSFULLY_REGISTERED);
2195                         } else
2196                                 return (INVALID_CALLBACK);
2197                 }
2198
2199         }
2200 }
2201
2202 /* Return the state of the blinking DPT LED's */
2203 u_int8_t
2204 dpt_blinking_led(dpt_softc_t * dpt)
2205 {
2206         int             ndx;
2207         int             ospl;
2208         u_int32_t       state;
2209         u_int32_t       previous;
2210         u_int8_t        result;
2211
2212         ospl = splcam();
2213
2214         result = 0;
2215
2216         for (ndx = 0, state = 0, previous = 0;
2217              (ndx < 10) && (state != previous);
2218              ndx++) {
2219                 previous = state;
2220                 state = dpt_inl(dpt, 1);
2221         }
2222
2223         if ((state == previous) && (state == DPT_BLINK_INDICATOR))
2224                 result = dpt_inb(dpt, 5);
2225
2226         splx(ospl);
2227         return (result);
2228 }
2229
2230 /*
2231  * Execute a command which did not come from the kernel's SCSI layer.
2232  * The only way to map user commands to bus and target is to comply with the
2233  * standard DPT wire-down scheme:
2234  */
2235 int
2236 dpt_user_cmd(dpt_softc_t * dpt, eata_pt_t * user_cmd,
2237              caddr_t cmdarg, int minor_no)
2238 {
2239         dpt_ccb_t *ccb;
2240         void      *data;
2241         int        channel, target, lun;
2242         int        huh;
2243         int        result;
2244         int        ospl;
2245         int        submitted;
2246
2247         data = NULL;
2248         channel = minor2hba(minor_no);
2249         target = minor2target(minor_no);
2250         lun = minor2lun(minor_no);
2251
2252         if ((channel > (dpt->channels - 1))
2253          || (target > dpt->max_id)
2254          || (lun > dpt->max_lun))
2255                 return (ENXIO);
2256
2257         if (target == dpt->sc_scsi_link[channel].adapter_targ) {
2258                 /* This one is for the controller itself */
2259                 if ((user_cmd->eataID[0] != 'E')
2260                  || (user_cmd->eataID[1] != 'A')
2261                  || (user_cmd->eataID[2] != 'T')
2262                  || (user_cmd->eataID[3] != 'A')) {
2263                         return (ENXIO);
2264                 }
2265         }
2266         /* Get a DPT CCB, so we can prepare a command */
2267         ospl = splsoftcam();
2268
2269         /* Process the free list */
2270         if ((TAILQ_EMPTY(&dpt->free_ccbs)) && dpt_alloc_freelist(dpt)) {
2271                 printf("dpt%d ERROR: Cannot allocate any more free CCB's.\n"
2272                        "             Please try later\n",
2273                        dpt->unit);
2274                 splx(ospl);
2275                 return (EFAULT);
2276         }
2277         /* Now grab the newest CCB */
2278         if ((ccb = dpt_Qpop_free(dpt)) == NULL) {
2279                 splx(ospl);
2280                 panic("dpt%d: Got a NULL CCB from pop_free()\n", dpt->unit);
2281         } else {
2282                 splx(ospl);
2283                 /* Clean up the leftover of the previous tenant */
2284                 ccb->status = DPT_CCB_STATE_NEW;
2285         }
2286
2287         bcopy((caddr_t) & user_cmd->command_packet, (caddr_t) & ccb->eata_ccb,
2288               sizeof(eata_ccb_t));
2289
2290         /* We do not want to do user specified scatter/gather.  Why?? */
2291         if (ccb->eata_ccb.scatter == 1)
2292                 return (EINVAL);
2293
2294         ccb->eata_ccb.Auto_Req_Sen = 1;
2295         ccb->eata_ccb.reqlen = htonl(sizeof(struct scsi_sense_data));
2296         ccb->eata_ccb.cp_datalen = htonl(sizeof(ccb->eata_ccb.cp_datalen));
2297         ccb->eata_ccb.cp_dataDMA = htonl(vtophys(ccb->eata_ccb.cp_dataDMA));
2298         ccb->eata_ccb.cp_statDMA = htonl(vtophys(&ccb->eata_ccb.cp_statDMA));
2299         ccb->eata_ccb.cp_reqDMA = htonl(vtophys(&ccb->eata_ccb.cp_reqDMA));
2300         ccb->eata_ccb.cp_viraddr = (u_int32_t) & ccb;
2301
2302         if (ccb->eata_ccb.DataIn || ccb->eata_ccb.DataOut) {
2303                 /* Data I/O is involved in this command.  Alocate buffer */
2304                 if (ccb->eata_ccb.cp_datalen > PAGE_SIZE) {
2305                         data = contigmalloc(ccb->eata_ccb.cp_datalen,
2306                                             M_TEMP, M_WAITOK, 0, ~0,
2307                                             ccb->eata_ccb.cp_datalen,
2308                                             0x10000);
2309                 } else {
2310                         data = malloc(ccb->eata_ccb.cp_datalen, M_TEMP,
2311                                       M_WAITOK);
2312                 }
2313
2314                 if (data == NULL) {
2315                         printf("dpt%d: Cannot allocate %d bytes "
2316                                "for EATA command\n", dpt->unit,
2317                                ccb->eata_ccb.cp_datalen);
2318                         return (EFAULT);
2319                 }
2320 #define usr_cmd_DMA (caddr_t)user_cmd->command_packet.cp_dataDMA
2321                 if (ccb->eata_ccb.DataIn == 1) {
2322                         if (copyin(usr_cmd_DMA,
2323                                    data, ccb->eata_ccb.cp_datalen) == -1)
2324                                 return (EFAULT);
2325                 }
2326         } else {
2327                 /* No data I/O involved here.  Make sure the DPT knows that */
2328                 ccb->eata_ccb.cp_datalen = 0;
2329                 data = NULL;
2330         }
2331
2332         if (ccb->eata_ccb.FWNEST == 1)
2333                 ccb->eata_ccb.FWNEST = 0;
2334
2335         if (ccb->eata_ccb.cp_datalen != 0) {
2336                 if (dpt_scatter_gather(dpt, ccb, ccb->eata_ccb.cp_datalen,
2337                                        data) != 0) {
2338                         if (data != NULL)
2339                                 free(data, M_TEMP);
2340                         return (EFAULT);
2341                 }
2342         }
2343         /**
2344          * We are required to quiet a SCSI bus.
2345          * since we do not queue comands on a bus basis,
2346          * we wait for ALL commands on a controller to complete.
2347          * In the mean time, sched_queue() will not schedule new commands.
2348          */
2349         if ((ccb->eata_ccb.cp_cdb[0] == MULTIFUNCTION_CMD)
2350             && (ccb->eata_ccb.cp_cdb[2] == BUS_QUIET)) {
2351                 /* We wait for ALL traffic for this HBa to subside */
2352                 ospl = splsoftcam();
2353                 dpt->state |= DPT_HA_QUIET;
2354                 splx(ospl);
2355
2356                 while ((submitted = dpt->submitted_ccbs_count) != 0) {
2357                         huh = tsleep((void *) dpt, PCATCH, "dptqt", 100 * hz);
2358                         switch (huh) {
2359                         case 0:
2360                                 /* Wakeup call received */
2361                                 break;
2362                         case EWOULDBLOCK:
2363                                 /* Timer Expired */
2364                                 break;
2365                         default:
2366                                 /* anything else */
2367                                 break;
2368                         }
2369                 }
2370         }
2371         /* Resume normal operation */
2372         if ((ccb->eata_ccb.cp_cdb[0] == MULTIFUNCTION_CMD)
2373             && (ccb->eata_ccb.cp_cdb[2] == BUS_UNQUIET)) {
2374                 ospl = splsoftcam();
2375                 dpt->state &= ~DPT_HA_QUIET;
2376                 splx(ospl);
2377         }
2378         /**
2379          * Schedule the command and submit it.
2380          * We bypass dpt_sched_queue, as it will block on DPT_HA_QUIET
2381          */
2382         ccb->xs = NULL;
2383         ccb->flags = 0;
2384         ccb->eata_ccb.Auto_Req_Sen = 1; /* We always want this feature */
2385
2386         ccb->transaction_id = ++dpt->commands_processed;
2387         ccb->std_callback = (ccb_callback) dpt_user_cmd_done;
2388         ccb->result = (u_int32_t) & cmdarg;
2389         ccb->data = data;
2390
2391 #ifdef DPT_MEASURE_PERFORMANCE
2392         ++dpt->performance.command_count[ccb->eata_ccb.cp_scsi_cmd];
2393         ccb->command_started = microtime_now;
2394 #endif
2395         ospl = splcam();
2396         dpt_Qadd_waiting(dpt, ccb);
2397         splx(ospl);
2398
2399         dpt_sched_queue(dpt);
2400
2401         /* Wait for the command to complete */
2402         (void) tsleep((void *) ccb, PCATCH, "dptucw", 100 * hz);
2403
2404         /* Free allocated memory */
2405         if (data != NULL)
2406                 free(data, M_TEMP);
2407
2408         return (0);
2409 }
2410
2411 static void
2412 dpt_user_cmd_done(dpt_softc_t * dpt, int bus, dpt_ccb_t * ccb)
2413 {
2414         int             ospl = splsoftcam();
2415         u_int32_t       result;
2416         caddr_t         cmd_arg;
2417
2418         /**
2419          * If Auto Request Sense is on, copyout the sense struct
2420          */
2421 #define usr_pckt_DMA    (caddr_t)(intptr_t)ntohl(ccb->eata_ccb.cp_reqDMA)
2422 #define usr_pckt_len    ntohl(ccb->eata_ccb.cp_datalen)
2423         if (ccb->eata_ccb.Auto_Req_Sen == 1) {
2424                 if (copyout((caddr_t) & ccb->sense_data, usr_pckt_DMA,
2425                             sizeof(struct scsi_sense_data))) {
2426                         ccb->result = EFAULT;
2427                         dpt_Qpush_free(dpt, ccb);
2428                         splx(ospl);
2429                         wakeup(ccb);
2430                         return;
2431                 }
2432         }
2433         /* If DataIn is on, copyout the data */
2434         if ((ccb->eata_ccb.DataIn == 1)
2435             && (ccb->status_packet.hba_stat == HA_NO_ERROR)) {
2436                 if (copyout(ccb->data, usr_pckt_DMA, usr_pckt_len)) {
2437                         dpt_Qpush_free(dpt, ccb);
2438                         ccb->result = EFAULT;
2439
2440                         splx(ospl);
2441                         wakeup(ccb);
2442                         return;
2443                 }
2444         }
2445         /* Copyout the status */
2446         result = ccb->status_packet.hba_stat;
2447         cmd_arg = (caddr_t) ccb->result;
2448
2449         if (copyout((caddr_t) & result, cmd_arg, sizeof(result))) {
2450                 dpt_Qpush_free(dpt, ccb);
2451                 ccb->result = EFAULT;
2452                 splx(ospl);
2453                 wakeup(ccb);
2454                 return;
2455         }
2456         /* Put the CCB back in the freelist */
2457         ccb->state |= DPT_CCB_STATE_COMPLETED;
2458         dpt_Qpush_free(dpt, ccb);
2459
2460         /* Free allocated memory */
2461         splx(ospl);
2462         return;
2463 }
2464
2465 #ifdef DPT_HANDLE_TIMEOUTS
2466 /**
2467  * This function walks down the SUBMITTED queue.
2468  * Every request that is too old gets aborted and marked.
2469  * Since the DPT will complete (interrupt) immediately (what does that mean?),
2470  * We just walk the list, aborting old commands and marking them as such.
2471  * The dpt_complete function will get rid of the that were interrupted in the
2472  * normal manner.
2473  *
2474  * This function needs to run at splcam(), as it interacts with the submitted
2475  * queue, as well as the completed and free queues.  Just like dpt_intr() does.
2476  * To run it at any ISPL other than that of dpt_intr(), will mean that dpt_intr
2477  * willbe able to pre-empt it, grab a transaction in progress (towards
2478  * destruction) and operate on it.  The state of this transaction will be not
2479  * very clear.
2480  * The only other option, is to lock it only as long as necessary but have
2481  * dpt_intr() spin-wait on it. In a UP environment this makes no sense and in
2482  * a SMP environment, the advantage is dubvious for a function that runs once
2483  * every ten seconds for few microseconds and, on systems with healthy
2484  * hardware, does not do anything anyway.
2485  */
2486
2487 static void
2488 dpt_handle_timeouts(dpt_softc_t * dpt)
2489 {
2490         dpt_ccb_t      *ccb;
2491         int             ospl;
2492
2493         ospl = splcam();
2494
2495         if (dpt->state & DPT_HA_TIMEOUTS_ACTIVE) {
2496                 printf("dpt%d WARNING: Timeout Handling Collision\n",
2497                        dpt->unit);
2498                 splx(ospl);
2499                 return;
2500         }
2501         dpt->state |= DPT_HA_TIMEOUTS_ACTIVE;
2502
2503         /* Loop through the entire submitted queue, looking for lost souls */
2504         for (ccb = TAILQ_FIRST(&dpt->submitted_ccbs);
2505              ccb != NULL;
2506              ccb = TAILQ_NEXT(ccb, links)) {
2507                 struct scsi_xfer *xs;
2508                 u_int32_t       age, max_age;
2509
2510                 xs = ccb->xs;
2511                 age = dpt_time_delta(ccb->command_started, microtime_now);
2512
2513 #define TenSec  10000000
2514
2515                 if (xs == NULL) {       /* Local, non-kernel call */
2516                         max_age = TenSec;
2517                 } else {
2518                         max_age = (((xs->timeout * (dpt->submitted_ccbs_count
2519                                                     + DPT_TIMEOUT_FACTOR))
2520                                     > TenSec)
2521                                  ? (xs->timeout * (dpt->submitted_ccbs_count
2522                                                    + DPT_TIMEOUT_FACTOR))
2523                                    : TenSec);
2524                 }
2525
2526                 /*
2527                  * If a transaction is marked lost and is TWICE as old as we
2528                  * care, then, and only then do we destroy it!
2529                  */
2530                 if (ccb->state & DPT_CCB_STATE_MARKED_LOST) {
2531                         /* Remember who is next */
2532                         if (age > (max_age * 2)) {
2533                                 dpt_Qremove_submitted(dpt, ccb);
2534                                 ccb->state &= ~DPT_CCB_STATE_MARKED_LOST;
2535                                 ccb->state |= DPT_CCB_STATE_ABORTED;
2536 #define cmd_name scsi_cmd_name(ccb->eata_ccb.cp_scsi_cmd)
2537                                 if (ccb->retries++ > DPT_RETRIES) {
2538                                         printf("dpt%d ERROR: Destroying stale "
2539                                                "%d (%s)\n"
2540                                                "                on "
2541                                                "c%db%dt%du%d (%d/%d)\n",
2542                                              dpt->unit, ccb->transaction_id,
2543                                                cmd_name,
2544                                                dpt->unit,
2545                                                ccb->eata_ccb.cp_channel,
2546                                                ccb->eata_ccb.cp_id,
2547                                                ccb->eata_ccb.cp_LUN, age,
2548                                                ccb->retries);
2549 #define send_ccb &ccb->eata_ccb
2550 #define ESA      EATA_SPECIFIC_ABORT
2551                                         (void) dpt_send_immediate(dpt,
2552                                                                   send_ccb,
2553                                                                   ESA,
2554                                                                   0, 0);
2555                                         dpt_Qpush_free(dpt, ccb);
2556
2557                                         /* The SCSI layer should re-try */
2558                                         xs->error |= XS_TIMEOUT;
2559                                         xs->flags |= SCSI_ITSDONE;
2560                                         scsi_done(xs);
2561                                 } else {
2562                                         printf("dpt%d ERROR: Stale %d (%s) on "
2563                                                "c%db%dt%du%d (%d)\n"
2564                                              "          gets another "
2565                                                "chance(%d/%d)\n",
2566                                              dpt->unit, ccb->transaction_id,
2567                                                cmd_name,
2568                                                dpt->unit,
2569                                                ccb->eata_ccb.cp_channel,
2570                                                ccb->eata_ccb.cp_id,
2571                                                ccb->eata_ccb.cp_LUN,
2572                                             age, ccb->retries, DPT_RETRIES);
2573
2574                                         dpt_Qpush_waiting(dpt, ccb);
2575                                         dpt_sched_queue(dpt);
2576                                 }
2577                         }
2578                 } else {
2579                         /*
2580                          * This is a transaction that is not to be destroyed
2581                          * (yet) But it is too old for our liking. We wait as
2582                          * long as the upper layer thinks. Not really, we
2583                          * multiply that by the number of commands in the
2584                          * submitted queue + 1.
2585                          */
2586                         if (!(ccb->state & DPT_CCB_STATE_MARKED_LOST) &&
2587                             (age != ~0) && (age > max_age)) {
2588                                 printf("dpt%d ERROR: Marking %d (%s) on "
2589                                        "c%db%dt%du%d \n"
2590                                        "            as late after %dusec\n",
2591                                        dpt->unit, ccb->transaction_id,
2592                                        cmd_name,
2593                                        dpt->unit, ccb->eata_ccb.cp_channel,
2594                                        ccb->eata_ccb.cp_id,
2595                                        ccb->eata_ccb.cp_LUN, age);
2596                                 ccb->state |= DPT_CCB_STATE_MARKED_LOST;
2597                         }
2598                 }
2599         }
2600
2601         dpt->state &= ~DPT_HA_TIMEOUTS_ACTIVE;
2602         splx(ospl);
2603 }
2604
2605 #endif                          /* DPT_HANDLE_TIMEOUTS */
2606
2607 #endif