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Silence harmless warnings (for module build).
[dragonfly.git] / sys / dev / raid / dpt / dpt_scsi.c
blob986329394091c4ce07fe73f98f57f97ddd86f847
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 1.12 2006/12/22 23:26:23 swildner 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 #include <sys/bus.h>
58 #include <sys/thread2.h>
59
60 #include <machine/clock.h>
61
62 #include <bus/cam/cam.h>
63 #include <bus/cam/cam_ccb.h>
64 #include <bus/cam/cam_sim.h>
65 #include <bus/cam/cam_xpt_sim.h>
66 #include <bus/cam/cam_debug.h>
67 #include <bus/cam/scsi/scsi_all.h>
68 #include <bus/cam/scsi/scsi_message.h>
69
70 #include <vm/vm.h>
71 #include <vm/pmap.h>
72
73 #include "dpt.h"
74
75 /* dpt_isa.c, dpt_eisa.c, and dpt_pci.c need this in a central place */
76 int dpt_controllers_present;
77
78 u_long dpt_unit; /* Next unit number to use */
79
80 /* The linked list of softc structures */
81 struct dpt_softc_list dpt_softcs = TAILQ_HEAD_INITIALIZER(dpt_softcs);
82
83 #define microtime_now dpt_time_now()
84
85 #define dpt_inl(dpt, port) \
86 bus_space_read_4((dpt)->tag, (dpt)->bsh, port)
87 #define dpt_inb(dpt, port) \
88 bus_space_read_1((dpt)->tag, (dpt)->bsh, port)
89 #define dpt_outl(dpt, port, value) \
90 bus_space_write_4((dpt)->tag, (dpt)->bsh, port, value)
91 #define dpt_outb(dpt, port, value) \
92 bus_space_write_1((dpt)->tag, (dpt)->bsh, port, value)
93
94 /*
95 * These will have to be setup by parameters passed at boot/load time. For
96 * perfromance reasons, we make them constants for the time being.
97 */
98 #define dpt_min_segs DPT_MAX_SEGS
99 #define dpt_max_segs DPT_MAX_SEGS
100
101 /* Definitions for our use of the SIM private CCB area */
102 #define ccb_dccb_ptr spriv_ptr0
103 #define ccb_dpt_ptr spriv_ptr1
104
105 /* ================= Private Inline Function declarations ===================*/
106 static __inline int dpt_just_reset(dpt_softc_t * dpt);
107 static __inline int dpt_raid_busy(dpt_softc_t * dpt);
108 static __inline int dpt_pio_wait (u_int32_t, u_int, u_int, u_int);
109 static __inline int dpt_wait(dpt_softc_t *dpt, u_int bits,
110 u_int state);
111 static __inline struct dpt_ccb* dptgetccb(struct dpt_softc *dpt);
112 static __inline void dptfreeccb(struct dpt_softc *dpt,
113 struct dpt_ccb *dccb);
114 static __inline u_int32_t dptccbvtop(struct dpt_softc *dpt,
115 struct dpt_ccb *dccb);
116
117 static __inline int dpt_send_immediate(dpt_softc_t *dpt,
118 eata_ccb_t *cmd_block,
119 u_int32_t cmd_busaddr,
120 u_int retries,
121 u_int ifc, u_int code,
122 u_int code2);
123
124 /* ==================== Private Function declarations =======================*/
125 static void dptmapmem(void *arg, bus_dma_segment_t *segs,
126 int nseg, int error);
127
128 static struct sg_map_node*
129 dptallocsgmap(struct dpt_softc *dpt);
130
131 static int dptallocccbs(dpt_softc_t *dpt);
132
133 static int dpt_get_conf(dpt_softc_t *dpt, dpt_ccb_t *dccb,
134 u_int32_t dccb_busaddr, u_int size,
135 u_int page, u_int target, int extent);
136 static void dpt_detect_cache(dpt_softc_t *dpt, dpt_ccb_t *dccb,
137 u_int32_t dccb_busaddr,
138 u_int8_t *buff);
139
140 static void dpt_poll(struct cam_sim *sim);
141
142 static void dptexecuteccb(void *arg, bus_dma_segment_t *dm_segs,
143 int nseg, int error);
144
145 static void dpt_action(struct cam_sim *sim, union ccb *ccb);
146
147 static int dpt_send_eata_command(dpt_softc_t *dpt, eata_ccb_t *cmd,
148 u_int32_t cmd_busaddr,
149 u_int command, u_int retries,
150 u_int ifc, u_int code,
151 u_int code2);
152 static void dptprocesserror(dpt_softc_t *dpt, dpt_ccb_t *dccb,
153 union ccb *ccb, u_int hba_stat,
154 u_int scsi_stat, u_int32_t resid);
155
156 static void dpttimeout(void *arg);
157 static void dptshutdown(void *arg, int howto);
158
159 /* ================= Private Inline Function definitions ====================*/
160 static __inline int
161 dpt_just_reset(dpt_softc_t * dpt)
162 {
163 if ((dpt_inb(dpt, 2) == 'D')
164 && (dpt_inb(dpt, 3) == 'P')
165 && (dpt_inb(dpt, 4) == 'T')
166 && (dpt_inb(dpt, 5) == 'H'))
167 return (1);
168 else
169 return (0);
170 }
171
172 static __inline int
173 dpt_raid_busy(dpt_softc_t * dpt)
174 {
175 if ((dpt_inb(dpt, 0) == 'D')
176 && (dpt_inb(dpt, 1) == 'P')
177 && (dpt_inb(dpt, 2) == 'T'))
178 return (1);
179 else
180 return (0);
181 }
182
183 static __inline int
184 dpt_pio_wait (u_int32_t base, u_int reg, u_int bits, u_int state)
185 {
186 int i;
187 u_int c;
188
189 for (i = 0; i < 20000; i++) { /* wait 20ms for not busy */
190 c = inb(base + reg) & bits;
191 if (!(c == state))
192 return (0);
193 else
194 DELAY(50);
195 }
196 return (-1);
197 }
198
199 static __inline int
200 dpt_wait(dpt_softc_t *dpt, u_int bits, u_int state)
201 {
202 int i;
203 u_int c;
204
205 for (i = 0; i < 20000; i++) { /* wait 20ms for not busy */
206 c = dpt_inb(dpt, HA_RSTATUS) & bits;
207 if (c == state)
208 return (0);
209 else
210 DELAY(50);
211 }
212 return (-1);
213 }
214
215 static __inline struct dpt_ccb*
216 dptgetccb(struct dpt_softc *dpt)
217 {
218 struct dpt_ccb* dccb;
219
220 crit_enter();
221 if ((dccb = SLIST_FIRST(&dpt->free_dccb_list)) != NULL) {
222 SLIST_REMOVE_HEAD(&dpt->free_dccb_list, links);
223 dpt->free_dccbs--;
224 } else if (dpt->total_dccbs < dpt->max_dccbs) {
225 dptallocccbs(dpt);
226 dccb = SLIST_FIRST(&dpt->free_dccb_list);
227 if (dccb == NULL)
228 kprintf("dpt%d: Can't malloc DCCB\n", dpt->unit);
229 else {
230 SLIST_REMOVE_HEAD(&dpt->free_dccb_list, links);
231 dpt->free_dccbs--;
232 }
233 }
234 crit_exit();
235
236 return (dccb);
237 }
238
239 static __inline void
240 dptfreeccb(struct dpt_softc *dpt, struct dpt_ccb *dccb)
241 {
242 crit_enter();
243 if ((dccb->state & DCCB_ACTIVE) != 0)
244 LIST_REMOVE(&dccb->ccb->ccb_h, sim_links.le);
245 if ((dccb->state & DCCB_RELEASE_SIMQ) != 0)
246 dccb->ccb->ccb_h.status |= CAM_RELEASE_SIMQ;
247 else if (dpt->resource_shortage != 0
248 && (dccb->ccb->ccb_h.status & CAM_RELEASE_SIMQ) == 0) {
249 dccb->ccb->ccb_h.status |= CAM_RELEASE_SIMQ;
250 dpt->resource_shortage = FALSE;
251 }
252 dccb->state = DCCB_FREE;
253 SLIST_INSERT_HEAD(&dpt->free_dccb_list, dccb, links);
254 ++dpt->free_dccbs;
255 crit_exit();
256 }
257
258 static __inline u_int32_t
259 dptccbvtop(struct dpt_softc *dpt, struct dpt_ccb *dccb)
260 {
261 return (dpt->dpt_ccb_busbase
262 + (u_int32_t)((caddr_t)dccb - (caddr_t)dpt->dpt_dccbs));
263 }
264
265 static __inline struct dpt_ccb *
266 dptccbptov(struct dpt_softc *dpt, u_int32_t busaddr)
267 {
268 return (dpt->dpt_dccbs
269 + ((struct dpt_ccb *)busaddr
270 - (struct dpt_ccb *)dpt->dpt_ccb_busbase));
271 }
272
273 /*
274 * Send a command for immediate execution by the DPT
275 * See above function for IMPORTANT notes.
276 */
277 static __inline int
278 dpt_send_immediate(dpt_softc_t *dpt, eata_ccb_t *cmd_block,
279 u_int32_t cmd_busaddr, u_int retries,
280 u_int ifc, u_int code, u_int code2)
281 {
282 return (dpt_send_eata_command(dpt, cmd_block, cmd_busaddr,
283 EATA_CMD_IMMEDIATE, retries, ifc,
284 code, code2));
285 }
286
287
288 /* ===================== Private Function definitions =======================*/
289 static void
290 dptmapmem(void *arg, bus_dma_segment_t *segs, int nseg, int error)
291 {
292 bus_addr_t *busaddrp;
293
294 busaddrp = (bus_addr_t *)arg;
295 *busaddrp = segs->ds_addr;
296 }
297
298 static struct sg_map_node *
299 dptallocsgmap(struct dpt_softc *dpt)
300 {
301 struct sg_map_node *sg_map;
302
303 sg_map = kmalloc(sizeof(*sg_map), M_DEVBUF, M_INTWAIT);
304
305 /* Allocate S/G space for the next batch of CCBS */
306 if (bus_dmamem_alloc(dpt->sg_dmat, (void **)&sg_map->sg_vaddr,
307 BUS_DMA_NOWAIT, &sg_map->sg_dmamap) != 0) {
308 kfree(sg_map, M_DEVBUF);
309 return (NULL);
310 }
311
312 (void)bus_dmamap_load(dpt->sg_dmat, sg_map->sg_dmamap, sg_map->sg_vaddr,
313 PAGE_SIZE, dptmapmem, &sg_map->sg_physaddr,
314 /*flags*/0);
315
316 SLIST_INSERT_HEAD(&dpt->sg_maps, sg_map, links);
317
318 return (sg_map);
319 }
320
321 /*
322 * Allocate another chunk of CCB's. Return count of entries added.
323 * Assumed to be called at splcam().
324 */
325 static int
326 dptallocccbs(dpt_softc_t *dpt)
327 {
328 struct dpt_ccb *next_ccb;
329 struct sg_map_node *sg_map;
330 bus_addr_t physaddr;
331 dpt_sg_t *segs;
332 int newcount;
333 int i;
334
335 next_ccb = &dpt->dpt_dccbs[dpt->total_dccbs];
336
337 if (next_ccb == dpt->dpt_dccbs) {
338 /*
339 * First time through. Re-use the S/G
340 * space we allocated for initialization
341 * CCBS.
342 */
343 sg_map = SLIST_FIRST(&dpt->sg_maps);
344 } else {
345 sg_map = dptallocsgmap(dpt);
346 }
347
348 if (sg_map == NULL)
349 return (0);
350
351 segs = sg_map->sg_vaddr;
352 physaddr = sg_map->sg_physaddr;
353
354 newcount = (PAGE_SIZE / (dpt->sgsize * sizeof(dpt_sg_t)));
355 for (i = 0; dpt->total_dccbs < dpt->max_dccbs && i < newcount; i++) {
356 int error;
357
358 error = bus_dmamap_create(dpt->buffer_dmat, /*flags*/0,
359 &next_ccb->dmamap);
360 if (error != 0)
361 break;
362 next_ccb->sg_list = segs;
363 next_ccb->sg_busaddr = htonl(physaddr);
364 next_ccb->eata_ccb.cp_dataDMA = htonl(physaddr);
365 next_ccb->eata_ccb.cp_statDMA = htonl(dpt->sp_physaddr);
366 next_ccb->eata_ccb.cp_reqDMA =
367 htonl(dptccbvtop(dpt, next_ccb)
368 + offsetof(struct dpt_ccb, sense_data));
369 next_ccb->eata_ccb.cp_busaddr = dpt->dpt_ccb_busend;
370 next_ccb->state = DCCB_FREE;
371 next_ccb->tag = dpt->total_dccbs;
372 SLIST_INSERT_HEAD(&dpt->free_dccb_list, next_ccb, links);
373 segs += dpt->sgsize;
374 physaddr += (dpt->sgsize * sizeof(dpt_sg_t));
375 dpt->dpt_ccb_busend += sizeof(*next_ccb);
376 next_ccb++;
377 dpt->total_dccbs++;
378 }
379 return (i);
380 }
381
382 dpt_conf_t *
383 dpt_pio_get_conf (u_int32_t base)
384 {
385 static dpt_conf_t * conf;
386 u_int16_t * p;
387 int i;
388
389 /*
390 * Allocate a dpt_conf_t
391 */
392 if (conf == NULL)
393 conf = kmalloc(sizeof(dpt_conf_t), M_DEVBUF, M_INTWAIT);
394
395 /*
396 * If we have one, clean it up.
397 */
398 bzero(conf, sizeof(dpt_conf_t));
399
400 /*
401 * Reset the controller.
402 */
403 outb((base + HA_WCOMMAND), EATA_CMD_RESET);
404
405 /*
406 * Wait for the controller to become ready.
407 * For some reason there can be -no- delays after calling reset
408 * before we wait on ready status.
409 */
410 if (dpt_pio_wait(base, HA_RSTATUS, HA_SBUSY, 0)) {
411 kprintf("dpt: timeout waiting for controller to become ready\n");
412 return (NULL);
413 }
414
415 if (dpt_pio_wait(base, HA_RAUXSTAT, HA_ABUSY, 0)) {
416 kprintf("dpt: timetout waiting for adapter ready.\n");
417 return (NULL);
418 }
419
420 /*
421 * Send the PIO_READ_CONFIG command.
422 */
423 outb((base + HA_WCOMMAND), EATA_CMD_PIO_READ_CONFIG);
424
425 /*
426 * Read the data into the struct.
427 */
428 p = (u_int16_t *)conf;
429 for (i = 0; i < (sizeof(dpt_conf_t) / 2); i++) {
430
431 if (dpt_pio_wait(base, HA_RSTATUS, HA_SDRQ, 0)) {
432 kprintf("dpt: timeout in data read.\n");
433 return (NULL);
434 }
435
436 (*p) = inw(base + HA_RDATA);
437 p++;
438 }
439
440 if (inb(base + HA_RSTATUS) & HA_SERROR) {
441 kprintf("dpt: error reading configuration data.\n");
442 return (NULL);
443 }
444
445 #define BE_EATA_SIGNATURE 0x45415441
446 #define LE_EATA_SIGNATURE 0x41544145
447
448 /*
449 * Test to see if we have a valid card.
450 */
451 if ((conf->signature == BE_EATA_SIGNATURE) ||
452 (conf->signature == LE_EATA_SIGNATURE)) {
453
454 while (inb(base + HA_RSTATUS) & HA_SDRQ) {
455 inw(base + HA_RDATA);
456 }
457
458 return (conf);
459 }
460 return (NULL);
461 }
462
463 /*
464 * Read a configuration page into the supplied dpt_cont_t buffer.
465 */
466 static int
467 dpt_get_conf(dpt_softc_t *dpt, dpt_ccb_t *dccb, u_int32_t dccb_busaddr,
468 u_int size, u_int page, u_int target, int extent)
469 {
470 eata_ccb_t *cp;
471
472 u_int8_t status;
473
474 int ndx;
475 int result;
476
477 cp = &dccb->eata_ccb;
478 bzero((void *)(uintptr_t)(volatile void *)dpt->sp, sizeof(*dpt->sp));
479
480 cp->Interpret = 1;
481 cp->DataIn = 1;
482 cp->Auto_Req_Sen = 1;
483 cp->reqlen = sizeof(struct scsi_sense_data);
484
485 cp->cp_id = target;
486 cp->cp_LUN = 0; /* In the EATA packet */
487 cp->cp_lun = 0; /* In the SCSI command */
488
489 cp->cp_scsi_cmd = INQUIRY;
490 cp->cp_len = size;
491
492 cp->cp_extent = extent;
493
494 cp->cp_page = page;
495 cp->cp_channel = 0; /* DNC, Interpret mode is set */
496 cp->cp_identify = 1;
497 cp->cp_datalen = htonl(size);
498
499 crit_enter();
500
501 /*
502 * This could be a simple for loop, but we suspected the compiler To
503 * have optimized it a bit too much. Wait for the controller to
504 * become ready
505 */
506 while (((status = dpt_inb(dpt, HA_RSTATUS)) != (HA_SREADY | HA_SSC)
507 && (status != (HA_SREADY | HA_SSC | HA_SERROR))
508 && (status != (HA_SDRDY | HA_SERROR | HA_SDRQ)))
509 || (dpt_wait(dpt, HA_SBUSY, 0))) {
510
511 /*
512 * RAID Drives still Spinning up? (This should only occur if
513 * the DPT controller is in a NON PC (PCI?) platform).
514 */
515 if (dpt_raid_busy(dpt)) {
516 kprintf("dpt%d WARNING: Get_conf() RSUS failed.\n",
517 dpt->unit);
518 crit_exit();
519 return (0);
520 }
521 }
522
523 DptStat_Reset_BUSY(dpt->sp);
524
525 /*
526 * XXXX We might want to do something more clever than aborting at
527 * this point, like resetting (rebooting) the controller and trying
528 * again.
529 */
530 if ((result = dpt_send_eata_command(dpt, cp, dccb_busaddr,
531 EATA_CMD_DMA_SEND_CP,
532 10000, 0, 0, 0)) != 0) {
533 kprintf("dpt%d WARNING: Get_conf() failed (%d) to send "
534 "EATA_CMD_DMA_READ_CONFIG\n",
535 dpt->unit, result);
536 crit_exit();
537 return (0);
538 }
539 /* Wait for two seconds for a response. This can be slow */
540 for (ndx = 0;
541 (ndx < 20000)
542 && !((status = dpt_inb(dpt, HA_RAUXSTAT)) & HA_AIRQ);
543 ndx++) {
544 DELAY(50);
545 }
546
547 /* Grab the status and clear interrupts */
548 status = dpt_inb(dpt, HA_RSTATUS);
549
550 crit_exit();
551
552 /*
553 * Check the status carefully. Return only if the
554 * command was successful.
555 */
556 if (((status & HA_SERROR) == 0)
557 && (dpt->sp->hba_stat == 0)
558 && (dpt->sp->scsi_stat == 0)
559 && (dpt->sp->residue_len == 0))
560 return (0);
561
562 if (dpt->sp->scsi_stat == SCSI_STATUS_CHECK_COND)
563 return (0);
564
565 return (1);
566 }
567
568 /* Detect Cache parameters and size */
569 static void
570 dpt_detect_cache(dpt_softc_t *dpt, dpt_ccb_t *dccb, u_int32_t dccb_busaddr,
571 u_int8_t *buff)
572 {
573 eata_ccb_t *cp;
574 u_int8_t *param;
575 int bytes;
576 int result;
577 int ndx;
578 u_int8_t status;
579
580 /*
581 * Default setting, for best perfromance..
582 * This is what virtually all cards default to..
583 */
584 dpt->cache_type = DPT_CACHE_WRITEBACK;
585 dpt->cache_size = 0;
586
587 cp = &dccb->eata_ccb;
588 bzero((void *)(uintptr_t)(volatile void *)dpt->sp, sizeof(dpt->sp));
589 bzero(buff, 512);
590
591 /* Setup the command structure */
592 cp->Interpret = 1;
593 cp->DataIn = 1;
594 cp->Auto_Req_Sen = 1;
595 cp->reqlen = sizeof(struct scsi_sense_data);
596
597 cp->cp_id = 0; /* who cares? The HBA will interpret.. */
598 cp->cp_LUN = 0; /* In the EATA packet */
599 cp->cp_lun = 0; /* In the SCSI command */
600 cp->cp_channel = 0;
601
602 cp->cp_scsi_cmd = EATA_CMD_DMA_SEND_CP;
603 cp->cp_len = 56;
604
605 cp->cp_extent = 0;
606 cp->cp_page = 0;
607 cp->cp_identify = 1;
608 cp->cp_dispri = 1;
609
610 /*
611 * Build the EATA Command Packet structure
612 * for a Log Sense Command.
613 */
614 cp->cp_cdb[0] = 0x4d;
615 cp->cp_cdb[1] = 0x0;
616 cp->cp_cdb[2] = 0x40 | 0x33;
617 cp->cp_cdb[7] = 1;
618
619 cp->cp_datalen = htonl(512);
620
621 crit_enter();
622 result = dpt_send_eata_command(dpt, cp, dccb_busaddr,
623 EATA_CMD_DMA_SEND_CP,
624 10000, 0, 0, 0);
625 if (result != 0) {
626 kprintf("dpt%d WARNING: detect_cache() failed (%d) to send "
627 "EATA_CMD_DMA_SEND_CP\n", dpt->unit, result);
628 crit_exit();
629 return;
630 }
631 /* Wait for two seconds for a response. This can be slow... */
632 for (ndx = 0;
633 (ndx < 20000) &&
634 !((status = dpt_inb(dpt, HA_RAUXSTAT)) & HA_AIRQ);
635 ndx++) {
636 DELAY(50);
637 }
638
639 /* Grab the status and clear interrupts */
640 status = dpt_inb(dpt, HA_RSTATUS);
641 crit_exit();
642
643 /*
644 * Sanity check
645 */
646 if (buff[0] != 0x33) {
647 return;
648 }
649 bytes = DPT_HCP_LENGTH(buff);
650 param = DPT_HCP_FIRST(buff);
651
652 if (DPT_HCP_CODE(param) != 1) {
653 /*
654 * DPT Log Page layout error
655 */
656 kprintf("dpt%d: NOTICE: Log Page (1) layout error\n",
657 dpt->unit);
658 return;
659 }
660 if (!(param[4] & 0x4)) {
661 dpt->cache_type = DPT_NO_CACHE;
662 return;
663 }
664 while (DPT_HCP_CODE(param) != 6) {
665 param = DPT_HCP_NEXT(param);
666 if ((param < buff)
667 || (param >= &buff[bytes])) {
668 return;
669 }
670 }
671
672 if (param[4] & 0x2) {
673 /*
674 * Cache disabled
675 */
676 dpt->cache_type = DPT_NO_CACHE;
677 return;
678 }
679
680 if (param[4] & 0x4) {
681 dpt->cache_type = DPT_CACHE_WRITETHROUGH;
682 }
683
684 /* XXX This isn't correct. This log parameter only has two bytes.... */
685 #if 0
686 dpt->cache_size = param[5]
687 | (param[6] << 8)
688 | (param[7] << 16)
689 | (param[8] << 24);
690 #endif
691 }
692
693 static void
694 dpt_poll(struct cam_sim *sim)
695 {
696 dpt_intr(cam_sim_softc(sim));
697 }
698
699 static void
700 dptexecuteccb(void *arg, bus_dma_segment_t *dm_segs, int nseg, int error)
701 {
702 struct dpt_ccb *dccb;
703 union ccb *ccb;
704 struct dpt_softc *dpt;
705
706 dccb = (struct dpt_ccb *)arg;
707 ccb = dccb->ccb;
708 dpt = (struct dpt_softc *)ccb->ccb_h.ccb_dpt_ptr;
709
710 if (error != 0) {
711 if (error != EFBIG)
712 kprintf("dpt%d: Unexepected error 0x%x returned from "
713 "bus_dmamap_load\n", dpt->unit, error);
714 if (ccb->ccb_h.status == CAM_REQ_INPROG) {
715 xpt_freeze_devq(ccb->ccb_h.path, /*count*/1);
716 ccb->ccb_h.status = CAM_REQ_TOO_BIG|CAM_DEV_QFRZN;
717 }
718 dptfreeccb(dpt, dccb);
719 xpt_done(ccb);
720 return;
721 }
722
723 if (nseg != 0) {
724 dpt_sg_t *sg;
725 bus_dma_segment_t *end_seg;
726 bus_dmasync_op_t op;
727
728 end_seg = dm_segs + nseg;
729
730 /* Copy the segments into our SG list */
731 sg = dccb->sg_list;
732 while (dm_segs < end_seg) {
733 sg->seg_len = htonl(dm_segs->ds_len);
734 sg->seg_addr = htonl(dm_segs->ds_addr);
735 sg++;
736 dm_segs++;
737 }
738
739 if (nseg > 1) {
740 dccb->eata_ccb.scatter = 1;
741 dccb->eata_ccb.cp_dataDMA = dccb->sg_busaddr;
742 dccb->eata_ccb.cp_datalen =
743 htonl(nseg * sizeof(dpt_sg_t));
744 } else {
745 dccb->eata_ccb.cp_dataDMA = dccb->sg_list[0].seg_addr;
746 dccb->eata_ccb.cp_datalen = dccb->sg_list[0].seg_len;
747 }
748
749 if ((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN)
750 op = BUS_DMASYNC_PREREAD;
751 else
752 op = BUS_DMASYNC_PREWRITE;
753
754 bus_dmamap_sync(dpt->buffer_dmat, dccb->dmamap, op);
755
756 } else {
757 dccb->eata_ccb.cp_dataDMA = 0;
758 dccb->eata_ccb.cp_datalen = 0;
759 }
760
761 crit_enter();
762
763 /*
764 * Last time we need to check if this CCB needs to
765 * be aborted.
766 */
767 if (ccb->ccb_h.status != CAM_REQ_INPROG) {
768 if (nseg != 0)
769 bus_dmamap_unload(dpt->buffer_dmat, dccb->dmamap);
770 dptfreeccb(dpt, dccb);
771 xpt_done(ccb);
772 crit_exit();
773 return;
774 }
775
776 dccb->state |= DCCB_ACTIVE;
777 ccb->ccb_h.status |= CAM_SIM_QUEUED;
778 LIST_INSERT_HEAD(&dpt->pending_ccb_list, &ccb->ccb_h, sim_links.le);
779 callout_reset(&ccb->ccb_h.timeout_ch, (ccb->ccb_h.timeout * hz) / 1000,
780 dpttimeout, dccb);
781 if (dpt_send_eata_command(dpt, &dccb->eata_ccb,
782 dccb->eata_ccb.cp_busaddr,
783 EATA_CMD_DMA_SEND_CP, 0, 0, 0, 0) != 0) {
784 ccb->ccb_h.status = CAM_NO_HBA; /* HBA dead or just busy?? */
785 if (nseg != 0)
786 bus_dmamap_unload(dpt->buffer_dmat, dccb->dmamap);
787 dptfreeccb(dpt, dccb);
788 xpt_done(ccb);
789 }
790
791 crit_exit();
792 }
793
794 static void
795 dpt_action(struct cam_sim *sim, union ccb *ccb)
796 {
797 struct dpt_softc *dpt;
798
799 CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE, ("dpt_action\n"));
800
801 dpt = (struct dpt_softc *)cam_sim_softc(sim);
802
803 if ((dpt->state & DPT_HA_SHUTDOWN_ACTIVE) != 0) {
804 xpt_print_path(ccb->ccb_h.path);
805 kprintf("controller is shutdown. Aborting CCB.\n");
806 ccb->ccb_h.status = CAM_NO_HBA;
807 xpt_done(ccb);
808 return;
809 }
810
811 switch (ccb->ccb_h.func_code) {
812 /* Common cases first */
813 case XPT_SCSI_IO: /* Execute the requested I/O operation */
814 {
815 struct ccb_scsiio *csio;
816 struct ccb_hdr *ccbh;
817 struct dpt_ccb *dccb;
818 struct eata_ccb *eccb;
819
820 csio = &ccb->csio;
821 ccbh = &ccb->ccb_h;
822 /* Max CDB length is 12 bytes */
823 if (csio->cdb_len > 12) {
824 ccb->ccb_h.status = CAM_REQ_INVALID;
825 xpt_done(ccb);
826 return;
827 }
828 if ((dccb = dptgetccb(dpt)) == NULL) {
829 crit_enter();
830 dpt->resource_shortage = 1;
831 crit_exit();
832 xpt_freeze_simq(sim, /*count*/1);
833 ccb->ccb_h.status = CAM_REQUEUE_REQ;
834 xpt_done(ccb);
835 return;
836 }
837 eccb = &dccb->eata_ccb;
838
839 /* Link dccb and ccb so we can find one from the other */
840 dccb->ccb = ccb;
841 ccb->ccb_h.ccb_dccb_ptr = dccb;
842 ccb->ccb_h.ccb_dpt_ptr = dpt;
843
844 /*
845 * Explicitly set all flags so that the compiler can
846 * be smart about setting them.
847 */
848 eccb->SCSI_Reset = 0;
849 eccb->HBA_Init = 0;
850 eccb->Auto_Req_Sen = (ccb->ccb_h.flags & CAM_DIS_AUTOSENSE)
851 ? 0 : 1;
852 eccb->scatter = 0;
853 eccb->Quick = 0;
854 eccb->Interpret =
855 ccb->ccb_h.target_id == dpt->hostid[cam_sim_bus(sim)]
856 ? 1 : 0;
857 eccb->DataOut = (ccb->ccb_h.flags & CAM_DIR_OUT) ? 1 : 0;
858 eccb->DataIn = (ccb->ccb_h.flags & CAM_DIR_IN) ? 1 : 0;
859 eccb->reqlen = csio->sense_len;
860 eccb->cp_id = ccb->ccb_h.target_id;
861 eccb->cp_channel = cam_sim_bus(sim);
862 eccb->cp_LUN = ccb->ccb_h.target_lun;
863 eccb->cp_luntar = 0;
864 eccb->cp_dispri = (ccb->ccb_h.flags & CAM_DIS_DISCONNECT)
865 ? 0 : 1;
866 eccb->cp_identify = 1;
867
868 if ((ccb->ccb_h.flags & CAM_TAG_ACTION_VALID) != 0
869 && csio->tag_action != CAM_TAG_ACTION_NONE) {
870 eccb->cp_msg[0] = csio->tag_action;
871 eccb->cp_msg[1] = dccb->tag;
872 } else {
873 eccb->cp_msg[0] = 0;
874 eccb->cp_msg[1] = 0;
875 }
876 eccb->cp_msg[2] = 0;
877
878 if ((ccb->ccb_h.flags & CAM_CDB_POINTER) != 0) {
879 if ((ccb->ccb_h.flags & CAM_CDB_PHYS) == 0) {
880 bcopy(csio->cdb_io.cdb_ptr,
881 eccb->cp_cdb, csio->cdb_len);
882 } else {
883 /* I guess I could map it in... */
884 ccb->ccb_h.status = CAM_REQ_INVALID;
885 dptfreeccb(dpt, dccb);
886 xpt_done(ccb);
887 return;
888 }
889 } else {
890 bcopy(csio->cdb_io.cdb_bytes,
891 eccb->cp_cdb, csio->cdb_len);
892 }
893 /*
894 * If we have any data to send with this command,
895 * map it into bus space.
896 */
897 /* Only use S/G if there is a transfer */
898 if ((ccbh->flags & CAM_DIR_MASK) != CAM_DIR_NONE) {
899 if ((ccbh->flags & CAM_SCATTER_VALID) == 0) {
900 /*
901 * We've been given a pointer
902 * to a single buffer.
903 */
904 if ((ccbh->flags & CAM_DATA_PHYS) == 0) {
905 int error;
906
907 crit_enter();
908 error =
909 bus_dmamap_load(dpt->buffer_dmat,
910 dccb->dmamap,
911 csio->data_ptr,
912 csio->dxfer_len,
913 dptexecuteccb,
914 dccb, /*flags*/0);
915 if (error == EINPROGRESS) {
916 /*
917 * So as to maintain ordering,
918 * freeze the controller queue
919 * until our mapping is
920 * returned.
921 */
922 xpt_freeze_simq(sim, 1);
923 dccb->state |= CAM_RELEASE_SIMQ;
924 }
925 crit_exit();
926 } else {
927 struct bus_dma_segment seg;
928
929 /* Pointer to physical buffer */
930 seg.ds_addr =
931 (bus_addr_t)csio->data_ptr;
932 seg.ds_len = csio->dxfer_len;
933 dptexecuteccb(dccb, &seg, 1, 0);
934 }
935 } else {
936 struct bus_dma_segment *segs;
937
938 if ((ccbh->flags & CAM_DATA_PHYS) != 0)
939 panic("dpt_action - Physical "
940 "segment pointers "
941 "unsupported");
942
943 if ((ccbh->flags&CAM_SG_LIST_PHYS)==0)
944 panic("dpt_action - Virtual "
945 "segment addresses "
946 "unsupported");
947
948 /* Just use the segments provided */
949 segs = (struct bus_dma_segment *)csio->data_ptr;
950 dptexecuteccb(dccb, segs, csio->sglist_cnt, 0);
951 }
952 } else {
953 /*
954 * XXX JGibbs.
955 * Does it want them both on or both off?
956 * CAM_DIR_NONE is both on, so this code can
957 * be removed if this is also what the DPT
958 * exptects.
959 */
960 eccb->DataOut = 0;
961 eccb->DataIn = 0;
962 dptexecuteccb(dccb, NULL, 0, 0);
963 }
964 break;
965 }
966 case XPT_RESET_DEV: /* Bus Device Reset the specified SCSI device */
967 case XPT_ABORT: /* Abort the specified CCB */
968 /* XXX Implement */
969 ccb->ccb_h.status = CAM_REQ_INVALID;
970 xpt_done(ccb);
971 break;
972 case XPT_SET_TRAN_SETTINGS:
973 {
974 ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
975 xpt_done(ccb);
976 break;
977 }
978 case XPT_GET_TRAN_SETTINGS:
979 /* Get default/user set transfer settings for the target */
980 {
981 struct ccb_trans_settings *cts;
982 u_int target_mask;
983
984 cts = &ccb->cts;
985 target_mask = 0x01 << ccb->ccb_h.target_id;
986 if ((cts->flags & CCB_TRANS_USER_SETTINGS) != 0) {
987 cts->flags = CCB_TRANS_DISC_ENB|CCB_TRANS_TAG_ENB;
988 cts->bus_width = (dpt->max_id > 7)
989 ? MSG_EXT_WDTR_BUS_8_BIT
990 : MSG_EXT_WDTR_BUS_16_BIT;
991 cts->sync_period = 25; /* 10MHz */
992
993 if (cts->sync_period != 0)
994 cts->sync_offset = 15;
995
996 cts->valid = CCB_TRANS_SYNC_RATE_VALID
997 | CCB_TRANS_SYNC_OFFSET_VALID
998 | CCB_TRANS_BUS_WIDTH_VALID
999 | CCB_TRANS_DISC_VALID
1000 | CCB_TRANS_TQ_VALID;
1001 ccb->ccb_h.status = CAM_REQ_CMP;
1002 } else {
1003 ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
1004 }
1005 xpt_done(ccb);
1006 break;
1007 }
1008 case XPT_CALC_GEOMETRY:
1009 {
1010 struct ccb_calc_geometry *ccg;
1011 u_int32_t size_mb;
1012 u_int32_t secs_per_cylinder;
1013 int extended;
1014
1015 /*
1016 * XXX Use Adaptec translation until I find out how to
1017 * get this information from the card.
1018 */
1019 ccg = &ccb->ccg;
1020 size_mb = ccg->volume_size
1021 / ((1024L * 1024L) / ccg->block_size);
1022 extended = 1;
1023
1024 if (size_mb > 1024 && extended) {
1025 ccg->heads = 255;
1026 ccg->secs_per_track = 63;
1027 } else {
1028 ccg->heads = 64;
1029 ccg->secs_per_track = 32;
1030 }
1031 secs_per_cylinder = ccg->heads * ccg->secs_per_track;
1032 ccg->cylinders = ccg->volume_size / secs_per_cylinder;
1033 ccb->ccb_h.status = CAM_REQ_CMP;
1034 xpt_done(ccb);
1035 break;
1036 }
1037 case XPT_RESET_BUS: /* Reset the specified SCSI bus */
1038 {
1039 /* XXX Implement */
1040 ccb->ccb_h.status = CAM_REQ_CMP;
1041 xpt_done(ccb);
1042 break;
1043 }
1044 case XPT_TERM_IO: /* Terminate the I/O process */
1045 /* XXX Implement */
1046 ccb->ccb_h.status = CAM_REQ_INVALID;
1047 xpt_done(ccb);
1048 break;
1049 case XPT_PATH_INQ: /* Path routing inquiry */
1050 {
1051 struct ccb_pathinq *cpi = &ccb->cpi;
1052
1053 cpi->version_num = 1;
1054 cpi->hba_inquiry = PI_SDTR_ABLE|PI_TAG_ABLE;
1055 if (dpt->max_id > 7)
1056 cpi->hba_inquiry |= PI_WIDE_16;
1057 cpi->target_sprt = 0;
1058 cpi->hba_misc = 0;
1059 cpi->hba_eng_cnt = 0;
1060 cpi->max_target = dpt->max_id;
1061 cpi->max_lun = dpt->max_lun;
1062 cpi->initiator_id = dpt->hostid[cam_sim_bus(sim)];
1063 cpi->bus_id = cam_sim_bus(sim);
1064 cpi->base_transfer_speed = 3300;
1065 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
1066 strncpy(cpi->hba_vid, "DPT", HBA_IDLEN);
1067 strncpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN);
1068 cpi->unit_number = cam_sim_unit(sim);
1069 cpi->ccb_h.status = CAM_REQ_CMP;
1070 xpt_done(ccb);
1071 break;
1072 }
1073 default:
1074 ccb->ccb_h.status = CAM_REQ_INVALID;
1075 xpt_done(ccb);
1076 break;
1077 }
1078 }
1079
1080 /*
1081 * This routine will try to send an EATA command to the DPT HBA.
1082 * It will, by default, try 20,000 times, waiting 50us between tries.
1083 * It returns 0 on success and 1 on failure.
1084 * It is assumed to be called at splcam().
1085 */
1086 static int
1087 dpt_send_eata_command(dpt_softc_t *dpt, eata_ccb_t *cmd_block,
1088 u_int32_t cmd_busaddr, u_int command, u_int retries,
1089 u_int ifc, u_int code, u_int code2)
1090 {
1091 u_int loop;
1092
1093 if (!retries)
1094 retries = 20000;
1095
1096 /*
1097 * I hate this polling nonsense. Wish there was a way to tell the DPT
1098 * to go get commands at its own pace, or to interrupt when ready.
1099 * In the mean time we will measure how many itterations it really
1100 * takes.
1101 */
1102 for (loop = 0; loop < retries; loop++) {
1103 if ((dpt_inb(dpt, HA_RAUXSTAT) & HA_ABUSY) == 0)
1104 break;
1105 else
1106 DELAY(50);
1107 }
1108
1109 if (loop < retries) {
1110 #ifdef DPT_MEASURE_PERFORMANCE
1111 if (loop > dpt->performance.max_eata_tries)
1112 dpt->performance.max_eata_tries = loop;
1113
1114 if (loop < dpt->performance.min_eata_tries)
1115 dpt->performance.min_eata_tries = loop;
1116 #endif
1117 } else {
1118 #ifdef DPT_MEASURE_PERFORMANCE
1119 ++dpt->performance.command_too_busy;
1120 #endif
1121 return (1);
1122 }
1123
1124 /* The controller is alive, advance the wedge timer */
1125 #ifdef DPT_RESET_HBA
1126 dpt->last_contact = microtime_now;
1127 #endif
1128
1129 if (cmd_block == NULL)
1130 cmd_busaddr = 0;
1131 #if (BYTE_ORDER == BIG_ENDIAN)
1132 else {
1133 cmd_busaddr = ((cmd_busaddr >> 24) & 0xFF)
1134 | ((cmd_busaddr >> 16) & 0xFF)
1135 | ((cmd_busaddr >> 8) & 0xFF)
1136 | (cmd_busaddr & 0xFF);
1137 }
1138 #endif
1139 /* And now the address */
1140 dpt_outl(dpt, HA_WDMAADDR, cmd_busaddr);
1141
1142 if (command == EATA_CMD_IMMEDIATE) {
1143 if (cmd_block == NULL) {
1144 dpt_outb(dpt, HA_WCODE2, code2);
1145 dpt_outb(dpt, HA_WCODE, code);
1146 }
1147 dpt_outb(dpt, HA_WIFC, ifc);
1148 }
1149 dpt_outb(dpt, HA_WCOMMAND, command);
1150
1151 return (0);
1152 }
1153
1154
1155 /* ==================== Exported Function definitions =======================*/
1156 dpt_softc_t *
1157 dpt_alloc(device_t dev, bus_space_tag_t tag, bus_space_handle_t bsh)
1158 {
1159 dpt_softc_t *dpt = device_get_softc(dev);
1160 int i;
1161
1162 bzero(dpt, sizeof(dpt_softc_t));
1163 dpt->tag = tag;
1164 dpt->bsh = bsh;
1165 dpt->unit = device_get_unit(dev);
1166 SLIST_INIT(&dpt->free_dccb_list);
1167 LIST_INIT(&dpt->pending_ccb_list);
1168 TAILQ_INSERT_TAIL(&dpt_softcs, dpt, links);
1169 for (i = 0; i < MAX_CHANNELS; i++)
1170 dpt->resetlevel[i] = DPT_HA_OK;
1171
1172 #ifdef DPT_MEASURE_PERFORMANCE
1173 dpt_reset_performance(dpt);
1174 #endif /* DPT_MEASURE_PERFORMANCE */
1175 return (dpt);
1176 }
1177
1178 void
1179 dpt_free(struct dpt_softc *dpt)
1180 {
1181 switch (dpt->init_level) {
1182 default:
1183 case 5:
1184 bus_dmamap_unload(dpt->dccb_dmat, dpt->dccb_dmamap);
1185 case 4:
1186 bus_dmamem_free(dpt->dccb_dmat, dpt->dpt_dccbs,
1187 dpt->dccb_dmamap);
1188 bus_dmamap_destroy(dpt->dccb_dmat, dpt->dccb_dmamap);
1189 case 3:
1190 bus_dma_tag_destroy(dpt->dccb_dmat);
1191 case 2:
1192 bus_dma_tag_destroy(dpt->buffer_dmat);
1193 case 1:
1194 {
1195 struct sg_map_node *sg_map;
1196
1197 while ((sg_map = SLIST_FIRST(&dpt->sg_maps)) != NULL) {
1198 SLIST_REMOVE_HEAD(&dpt->sg_maps, links);
1199 bus_dmamap_unload(dpt->sg_dmat,
1200 sg_map->sg_dmamap);
1201 bus_dmamem_free(dpt->sg_dmat, sg_map->sg_vaddr,
1202 sg_map->sg_dmamap);
1203 kfree(sg_map, M_DEVBUF);
1204 }
1205 bus_dma_tag_destroy(dpt->sg_dmat);
1206 }
1207 case 0:
1208 break;
1209 }
1210 TAILQ_REMOVE(&dpt_softcs, dpt, links);
1211 }
1212
1213 static u_int8_t string_sizes[] =
1214 {
1215 sizeof(((dpt_inq_t*)NULL)->vendor),
1216 sizeof(((dpt_inq_t*)NULL)->modelNum),
1217 sizeof(((dpt_inq_t*)NULL)->firmware),
1218 sizeof(((dpt_inq_t*)NULL)->protocol),
1219 };
1220
1221 int
1222 dpt_init(struct dpt_softc *dpt)
1223 {
1224 dpt_conf_t conf;
1225 struct sg_map_node *sg_map;
1226 dpt_ccb_t *dccb;
1227 u_int8_t *strp;
1228 int index;
1229 int i;
1230 int retval;
1231
1232 dpt->init_level = 0;
1233 SLIST_INIT(&dpt->sg_maps);
1234
1235 #ifdef DPT_RESET_BOARD
1236 kprintf("dpt%d: resetting HBA\n", dpt->unit);
1237 dpt_outb(dpt, HA_WCOMMAND, EATA_CMD_RESET);
1238 DELAY(750000);
1239 /* XXX Shouldn't we poll a status register or something??? */
1240 #endif
1241 /* DMA tag for our S/G structures. We allocate in page sized chunks */
1242 if (bus_dma_tag_create(dpt->parent_dmat, /*alignment*/1, /*boundary*/0,
1243 /*lowaddr*/BUS_SPACE_MAXADDR,
1244 /*highaddr*/BUS_SPACE_MAXADDR,
1245 /*filter*/NULL, /*filterarg*/NULL,
1246 PAGE_SIZE, /*nsegments*/1,
1247 /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
1248 /*flags*/0, &dpt->sg_dmat) != 0) {
1249 goto error_exit;
1250 }
1251
1252 dpt->init_level++;
1253
1254 /*
1255 * We allocate our DPT ccbs as a contiguous array of bus dma'able
1256 * memory. To get the allocation size, we need to know how many
1257 * ccbs the card supports. This requires a ccb. We solve this
1258 * chicken and egg problem by allocating some re-usable S/G space
1259 * up front, and treating it as our status packet, CCB, and target
1260 * memory space for these commands.
1261 */
1262 sg_map = dptallocsgmap(dpt);
1263 if (sg_map == NULL)
1264 goto error_exit;
1265
1266 dpt->sp = (volatile dpt_sp_t *)sg_map->sg_vaddr;
1267 dccb = (struct dpt_ccb *)(uintptr_t)(volatile void *)&dpt->sp[1];
1268 bzero(dccb, sizeof(*dccb));
1269 dpt->sp_physaddr = sg_map->sg_physaddr;
1270 dccb->eata_ccb.cp_dataDMA =
1271 htonl(sg_map->sg_physaddr + sizeof(dpt_sp_t) + sizeof(*dccb));
1272 dccb->eata_ccb.cp_busaddr = ~0;
1273 dccb->eata_ccb.cp_statDMA = htonl(dpt->sp_physaddr);
1274 dccb->eata_ccb.cp_reqDMA = htonl(dpt->sp_physaddr + sizeof(*dccb)
1275 + offsetof(struct dpt_ccb, sense_data));
1276
1277 /* Okay. Fetch our config */
1278 bzero(&dccb[1], sizeof(conf)); /* data area */
1279 retval = dpt_get_conf(dpt, dccb, sg_map->sg_physaddr + sizeof(dpt_sp_t),
1280 sizeof(conf), 0xc1, 7, 1);
1281
1282 if (retval != 0) {
1283 kprintf("dpt%d: Failed to get board configuration\n", dpt->unit);
1284 return (retval);
1285 }
1286 bcopy(&dccb[1], &conf, sizeof(conf));
1287
1288 bzero(&dccb[1], sizeof(dpt->board_data));
1289 retval = dpt_get_conf(dpt, dccb, sg_map->sg_physaddr + sizeof(dpt_sp_t),
1290 sizeof(dpt->board_data), 0, conf.scsi_id0, 0);
1291 if (retval != 0) {
1292 kprintf("dpt%d: Failed to get inquiry information\n", dpt->unit);
1293 return (retval);
1294 }
1295 bcopy(&dccb[1], &dpt->board_data, sizeof(dpt->board_data));
1296
1297 dpt_detect_cache(dpt, dccb, sg_map->sg_physaddr + sizeof(dpt_sp_t),
1298 (u_int8_t *)&dccb[1]);
1299
1300 switch (ntohl(conf.splen)) {
1301 case DPT_EATA_REVA:
1302 dpt->EATA_revision = 'a';
1303 break;
1304 case DPT_EATA_REVB:
1305 dpt->EATA_revision = 'b';
1306 break;
1307 case DPT_EATA_REVC:
1308 dpt->EATA_revision = 'c';
1309 break;
1310 case DPT_EATA_REVZ:
1311 dpt->EATA_revision = 'z';
1312 break;
1313 default:
1314 dpt->EATA_revision = '?';
1315 }
1316
1317 dpt->max_id = conf.MAX_ID;
1318 dpt->max_lun = conf.MAX_LUN;
1319 dpt->irq = conf.IRQ;
1320 dpt->dma_channel = (8 - conf.DMA_channel) & 7;
1321 dpt->channels = conf.MAX_CHAN + 1;
1322 dpt->state |= DPT_HA_OK;
1323 if (conf.SECOND)
1324 dpt->primary = FALSE;
1325 else
1326 dpt->primary = TRUE;
1327
1328 dpt->more_support = conf.MORE_support;
1329
1330 if (strncmp(dpt->board_data.firmware, "07G0", 4) >= 0)
1331 dpt->immediate_support = 1;
1332 else
1333 dpt->immediate_support = 0;
1334
1335 dpt->broken_INQUIRY = FALSE;
1336
1337 dpt->cplen = ntohl(conf.cplen);
1338 dpt->cppadlen = ntohs(conf.cppadlen);
1339 dpt->max_dccbs = ntohs(conf.queuesiz);
1340
1341 if (dpt->max_dccbs > 256) {
1342 kprintf("dpt%d: Max CCBs reduced from %d to "
1343 "256 due to tag algorithm\n", dpt->unit, dpt->max_dccbs);
1344 dpt->max_dccbs = 256;
1345 }
1346
1347 dpt->hostid[0] = conf.scsi_id0;
1348 dpt->hostid[1] = conf.scsi_id1;
1349 dpt->hostid[2] = conf.scsi_id2;
1350
1351 if (conf.SG_64K)
1352 dpt->sgsize = 8192;
1353 else
1354 dpt->sgsize = ntohs(conf.SGsiz);
1355
1356 /* We can only get 64k buffers, so don't bother to waste space. */
1357 if (dpt->sgsize < 17 || dpt->sgsize > 32)
1358 dpt->sgsize = 32;
1359
1360 if (dpt->sgsize > dpt_max_segs)
1361 dpt->sgsize = dpt_max_segs;
1362
1363 /* DMA tag for mapping buffers into device visible space. */
1364 if (bus_dma_tag_create(dpt->parent_dmat, /*alignment*/1, /*boundary*/0,
1365 /*lowaddr*/BUS_SPACE_MAXADDR,
1366 /*highaddr*/BUS_SPACE_MAXADDR,
1367 /*filter*/NULL, /*filterarg*/NULL,
1368 /*maxsize*/MAXBSIZE, /*nsegments*/dpt->sgsize,
1369 /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
1370 /*flags*/BUS_DMA_ALLOCNOW,
1371 &dpt->buffer_dmat) != 0) {
1372 kprintf("dpt: bus_dma_tag_create(...,dpt->buffer_dmat) failed\n");
1373 goto error_exit;
1374 }
1375
1376 dpt->init_level++;
1377
1378 /* DMA tag for our ccb structures and interrupt status packet */
1379 if (bus_dma_tag_create(dpt->parent_dmat, /*alignment*/1, /*boundary*/0,
1380 /*lowaddr*/BUS_SPACE_MAXADDR,
1381 /*highaddr*/BUS_SPACE_MAXADDR,
1382 /*filter*/NULL, /*filterarg*/NULL,
1383 (dpt->max_dccbs * sizeof(struct dpt_ccb))
1384 + sizeof(dpt_sp_t),
1385 /*nsegments*/1,
1386 /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
1387 /*flags*/0, &dpt->dccb_dmat) != 0) {
1388 kprintf("dpt: bus_dma_tag_create(...,dpt->dccb_dmat) failed\n");
1389 goto error_exit;
1390 }
1391
1392 dpt->init_level++;
1393
1394 /* Allocation for our ccbs and interrupt status packet */
1395 if (bus_dmamem_alloc(dpt->dccb_dmat, (void **)&dpt->dpt_dccbs,
1396 BUS_DMA_NOWAIT, &dpt->dccb_dmamap) != 0) {
1397 kprintf("dpt: bus_dmamem_alloc(dpt->dccb_dmat,...) failed\n");
1398 goto error_exit;
1399 }
1400
1401 dpt->init_level++;
1402
1403 /* And permanently map them */
1404 bus_dmamap_load(dpt->dccb_dmat, dpt->dccb_dmamap,
1405 dpt->dpt_dccbs,
1406 (dpt->max_dccbs * sizeof(struct dpt_ccb))
1407 + sizeof(dpt_sp_t),
1408 dptmapmem, &dpt->dpt_ccb_busbase, /*flags*/0);
1409
1410 /* Clear them out. */
1411 bzero(dpt->dpt_dccbs,
1412 (dpt->max_dccbs * sizeof(struct dpt_ccb)) + sizeof(dpt_sp_t));
1413
1414 dpt->dpt_ccb_busend = dpt->dpt_ccb_busbase;
1415
1416 dpt->sp = (dpt_sp_t*)&dpt->dpt_dccbs[dpt->max_dccbs];
1417 dpt->sp_physaddr = dpt->dpt_ccb_busbase
1418 + (dpt->max_dccbs * sizeof(dpt_ccb_t));
1419 dpt->init_level++;
1420
1421 /* Allocate our first batch of ccbs */
1422 if (dptallocccbs(dpt) == 0) {
1423 kprintf("dpt: dptallocccbs(dpt) == 0\n");
1424 return (2);
1425 }
1426
1427 /* Prepare for Target Mode */
1428 dpt->target_mode_enabled = 1;
1429
1430 /* Nuke excess spaces from inquiry information */
1431 strp = dpt->board_data.vendor;
1432 for (i = 0; i < sizeof(string_sizes); i++) {
1433 index = string_sizes[i] - 1;
1434 while (index && (strp[index] == ' '))
1435 strp[index--] = '\0';
1436 strp += string_sizes[i];
1437 }
1438
1439 kprintf("dpt%d: %.8s %.16s FW Rev. %.4s, ",
1440 dpt->unit, dpt->board_data.vendor,
1441 dpt->board_data.modelNum, dpt->board_data.firmware);
1442
1443 kprintf("%d channel%s, ", dpt->channels, dpt->channels > 1 ? "s" : "");
1444
1445 if (dpt->cache_type != DPT_NO_CACHE
1446 && dpt->cache_size != 0) {
1447 kprintf("%s Cache, ",
1448 dpt->cache_type == DPT_CACHE_WRITETHROUGH
1449 ? "Write-Through" : "Write-Back");
1450 }
1451
1452 kprintf("%d CCBs\n", dpt->max_dccbs);
1453 return (0);
1454
1455 error_exit:
1456 return (1);
1457 }
1458
1459 int
1460 dpt_attach(dpt_softc_t *dpt)
1461 {
1462 struct cam_devq *devq;
1463 int i;
1464
1465 /*
1466 * Create the device queue for our SIM.
1467 */
1468 devq = cam_simq_alloc(dpt->max_dccbs);
1469 if (devq == NULL)
1470 return (0);
1471
1472 for (i = 0; i < dpt->channels; i++) {
1473 /*
1474 * Construct our SIM entry
1475 */
1476 dpt->sims[i] = cam_sim_alloc(dpt_action, dpt_poll, "dpt",
1477 dpt, dpt->unit, /*untagged*/2,
1478 /*tagged*/dpt->max_dccbs, devq);
1479 if (xpt_bus_register(dpt->sims[i], i) != CAM_SUCCESS) {
1480 cam_sim_free(dpt->sims[i]);
1481 break;
1482 }
1483
1484 if (xpt_create_path(&dpt->paths[i], /*periph*/NULL,
1485 cam_sim_path(dpt->sims[i]),
1486 CAM_TARGET_WILDCARD,
1487 CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
1488 xpt_bus_deregister(cam_sim_path(dpt->sims[i]));
1489 cam_sim_free(dpt->sims[i]);
1490 break;
1491 }
1492
1493 }
1494 cam_simq_release(devq);
1495 if (i > 0)
1496 EVENTHANDLER_REGISTER(shutdown_final, dptshutdown,
1497 dpt, SHUTDOWN_PRI_DEFAULT);
1498 return (i);
1499 }
1500
1501
1502 /*
1503 * This is the interrupt handler for the DPT driver.
1504 */
1505 void
1506 dpt_intr(void *arg)
1507 {
1508 dpt_softc_t *dpt;
1509 dpt_ccb_t *dccb;
1510 union ccb *ccb;
1511 u_int status;
1512 u_int aux_status;
1513 u_int hba_stat;
1514 u_int scsi_stat;
1515 u_int32_t residue_len; /* Number of bytes not transferred */
1516
1517 dpt = (dpt_softc_t *)arg;
1518
1519 /* First order of business is to check if this interrupt is for us */
1520 while (((aux_status = dpt_inb(dpt, HA_RAUXSTAT)) & HA_AIRQ) != 0) {
1521
1522 /*
1523 * What we want to do now, is to capture the status, all of it,
1524 * move it where it belongs, wake up whoever sleeps waiting to
1525 * process this result, and get out of here.
1526 */
1527 if (dpt->sp->ccb_busaddr < dpt->dpt_ccb_busbase
1528 || dpt->sp->ccb_busaddr >= dpt->dpt_ccb_busend) {
1529 kprintf("Encountered bogus status packet\n");
1530 status = dpt_inb(dpt, HA_RSTATUS);
1531 return;
1532 }
1533
1534 dccb = dptccbptov(dpt, dpt->sp->ccb_busaddr);
1535
1536 dpt->sp->ccb_busaddr = ~0;
1537
1538 /* Ignore status packets with EOC not set */
1539 if (dpt->sp->EOC == 0) {
1540 kprintf("dpt%d ERROR: Request %d received with "
1541 "clear EOC.\n Marking as LOST.\n",
1542 dpt->unit, dccb->transaction_id);
1543
1544 #ifdef DPT_HANDLE_TIMEOUTS
1545 dccb->state |= DPT_CCB_STATE_MARKED_LOST;
1546 #endif
1547 /* This CLEARS the interrupt! */
1548 status = dpt_inb(dpt, HA_RSTATUS);
1549 continue;
1550 }
1551 dpt->sp->EOC = 0;
1552
1553 /*
1554 * Double buffer the status information so the hardware can
1555 * work on updating the status packet while we decifer the
1556 * one we were just interrupted for.
1557 * According to Mark Salyzyn, we only need few pieces of it.
1558 */
1559 hba_stat = dpt->sp->hba_stat;
1560 scsi_stat = dpt->sp->scsi_stat;
1561 residue_len = dpt->sp->residue_len;
1562
1563 /* Clear interrupts, check for error */
1564 if ((status = dpt_inb(dpt, HA_RSTATUS)) & HA_SERROR) {
1565 /*
1566 * Error Condition. Check for magic cookie. Exit
1567 * this test on earliest sign of non-reset condition
1568 */
1569
1570 /* Check that this is not a board reset interrupt */
1571 if (dpt_just_reset(dpt)) {
1572 kprintf("dpt%d: HBA rebooted.\n"
1573 " All transactions should be "
1574 "resubmitted\n",
1575 dpt->unit);
1576
1577 kprintf("dpt%d: >>---->> This is incomplete, "
1578 "fix me.... <<----<<", dpt->unit);
1579 panic("DPT Rebooted");
1580
1581 }
1582 }
1583 /* Process CCB */
1584 ccb = dccb->ccb;
1585 callout_stop(&ccb->ccb_h.timeout_ch);
1586 if ((ccb->ccb_h.flags & CAM_DIR_MASK) != CAM_DIR_NONE) {
1587 bus_dmasync_op_t op;
1588
1589 if ((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN)
1590 op = BUS_DMASYNC_POSTREAD;
1591 else
1592 op = BUS_DMASYNC_POSTWRITE;
1593 bus_dmamap_sync(dpt->buffer_dmat, dccb->dmamap, op);
1594 bus_dmamap_unload(dpt->buffer_dmat, dccb->dmamap);
1595 }
1596
1597 /* Common Case inline... */
1598 if (hba_stat == HA_NO_ERROR) {
1599 ccb->csio.scsi_status = scsi_stat;
1600 ccb->ccb_h.status = 0;
1601 switch (scsi_stat) {
1602 case SCSI_STATUS_OK:
1603 ccb->ccb_h.status |= CAM_REQ_CMP;
1604 break;
1605 case SCSI_STATUS_CHECK_COND:
1606 case SCSI_STATUS_CMD_TERMINATED:
1607 bcopy(&dccb->sense_data, &ccb->csio.sense_data,
1608 ccb->csio.sense_len);
1609 ccb->ccb_h.status |= CAM_AUTOSNS_VALID;
1610 /* FALLTHROUGH */
1611 default:
1612 ccb->ccb_h.status |= CAM_SCSI_STATUS_ERROR;
1613 /* XXX Freeze DevQ */
1614 break;
1615 }
1616 ccb->csio.resid = residue_len;
1617 dptfreeccb(dpt, dccb);
1618 xpt_done(ccb);
1619 } else {
1620 dptprocesserror(dpt, dccb, ccb, hba_stat, scsi_stat,
1621 residue_len);
1622 }
1623 }
1624 }
1625
1626 static void
1627 dptprocesserror(dpt_softc_t *dpt, dpt_ccb_t *dccb, union ccb *ccb,
1628 u_int hba_stat, u_int scsi_stat, u_int32_t resid)
1629 {
1630 ccb->csio.resid = resid;
1631 switch (hba_stat) {
1632 case HA_ERR_SEL_TO:
1633 ccb->ccb_h.status = CAM_SEL_TIMEOUT;
1634 break;
1635 case HA_ERR_CMD_TO:
1636 ccb->ccb_h.status = CAM_CMD_TIMEOUT;
1637 break;
1638 case HA_SCSIBUS_RESET:
1639 case HA_HBA_POWER_UP: /* Similar effect to a bus reset??? */
1640 ccb->ccb_h.status = CAM_SCSI_BUS_RESET;
1641 break;
1642 case HA_CP_ABORTED:
1643 case HA_CP_RESET: /* XXX ??? */
1644 case HA_CP_ABORT_NA: /* XXX ??? */
1645 case HA_CP_RESET_NA: /* XXX ??? */
1646 if ((ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_INPROG)
1647 ccb->ccb_h.status = CAM_REQ_ABORTED;
1648 break;
1649 case HA_PCI_PARITY:
1650 case HA_PCI_MABORT:
1651 case HA_PCI_TABORT:
1652 case HA_PCI_STABORT:
1653 case HA_BUS_PARITY:
1654 case HA_PARITY_ERR:
1655 case HA_ECC_ERR:
1656 ccb->ccb_h.status = CAM_UNCOR_PARITY;
1657 break;
1658 case HA_UNX_MSGRJCT:
1659 ccb->ccb_h.status = CAM_MSG_REJECT_REC;
1660 break;
1661 case HA_UNX_BUSPHASE:
1662 ccb->ccb_h.status = CAM_SEQUENCE_FAIL;
1663 break;
1664 case HA_UNX_BUS_FREE:
1665 ccb->ccb_h.status = CAM_UNEXP_BUSFREE;
1666 break;
1667 case HA_SCSI_HUNG:
1668 case HA_RESET_STUCK:
1669 /*
1670 * Dead??? Can the controller get unstuck
1671 * from these conditions
1672 */
1673 ccb->ccb_h.status = CAM_NO_HBA;
1674 break;
1675 case HA_RSENSE_FAIL:
1676 ccb->ccb_h.status = CAM_AUTOSENSE_FAIL;
1677 break;
1678 default:
1679 kprintf("dpt%d: Undocumented Error %x\n", dpt->unit, hba_stat);
1680 kprintf("Please mail this message to shimon@simon-shapiro.org\n");
1681 ccb->ccb_h.status = CAM_REQ_CMP_ERR;
1682 break;
1683 }
1684 dptfreeccb(dpt, dccb);
1685 xpt_done(ccb);
1686 }
1687
1688 static void
1689 dpttimeout(void *arg)
1690 {
1691 struct dpt_ccb *dccb;
1692 union ccb *ccb;
1693 struct dpt_softc *dpt;
1694
1695 dccb = (struct dpt_ccb *)arg;
1696 ccb = dccb->ccb;
1697 dpt = (struct dpt_softc *)ccb->ccb_h.ccb_dpt_ptr;
1698 xpt_print_path(ccb->ccb_h.path);
1699 kprintf("CCB %p - timed out\n", (void *)dccb);
1700
1701 crit_enter();
1702
1703 /*
1704 * Try to clear any pending jobs. FreeBSD will loose interrupts,
1705 * leaving the controller suspended, and commands timed-out.
1706 * By calling the interrupt handler, any command thus stuck will be
1707 * completed.
1708 */
1709 dpt_intr(dpt);
1710
1711 if ((dccb->state & DCCB_ACTIVE) == 0) {
1712 xpt_print_path(ccb->ccb_h.path);
1713 kprintf("CCB %p - timed out CCB already completed\n",
1714 (void *)dccb);
1715 crit_exit();
1716 return;
1717 }
1718
1719 /* Abort this particular command. Leave all others running */
1720 dpt_send_immediate(dpt, &dccb->eata_ccb, dccb->eata_ccb.cp_busaddr,
1721 /*retries*/20000, EATA_SPECIFIC_ABORT, 0, 0);
1722 ccb->ccb_h.status = CAM_CMD_TIMEOUT;
1723 crit_exit();
1724 }
1725
1726 /*
1727 * Shutdown the controller and ensure that the cache is completely flushed.
1728 * Called from the shutdown_final event after all disk access has completed.
1729 */
1730 static void
1731 dptshutdown(void *arg, int howto)
1732 {
1733 dpt_softc_t *dpt;
1734
1735 dpt = (dpt_softc_t *)arg;
1736
1737 kprintf("dpt%d: Shutting down (mode %x) HBA. Please wait...\n",
1738 dpt->unit, howto);
1739
1740 /*
1741 * What we do for a shutdown, is give the DPT early power loss warning
1742 */
1743 dpt_send_immediate(dpt, NULL, 0, EATA_POWER_OFF_WARN, 0, 0, 0);
1744 DELAY(1000 * 1000 * 5);
1745 kprintf("dpt%d: Controller was warned of shutdown and is now "
1746 "disabled\n", dpt->unit);
1747 }
1748
1749 /*============================================================================*/
1750
1751 #if 0
1752 #ifdef DPT_RESET_HBA
1753
1754 /*
1755 ** Function name : dpt_reset_hba
1756 **
1757 ** Description : Reset the HBA and properly discard all pending work
1758 ** Input : Softc
1759 ** Output : Nothing
1760 */
1761 static void
1762 dpt_reset_hba(dpt_softc_t *dpt)
1763 {
1764 eata_ccb_t *ccb;
1765 dpt_ccb_t dccb, *dccbp;
1766 int result;
1767 struct scsi_xfer *xs;
1768
1769 /* Prepare a control block. The SCSI command part is immaterial */
1770 dccb.xs = NULL;
1771 dccb.flags = 0;
1772 dccb.state = DPT_CCB_STATE_NEW;
1773 dccb.std_callback = NULL;
1774 dccb.wrbuff_callback = NULL;
1775
1776 ccb = &dccb.eata_ccb;
1777 ccb->CP_OpCode = EATA_CMD_RESET;
1778 ccb->SCSI_Reset = 0;
1779 ccb->HBA_Init = 1;
1780 ccb->Auto_Req_Sen = 1;
1781 ccb->cp_id = 0; /* Should be ignored */
1782 ccb->DataIn = 1;
1783 ccb->DataOut = 0;
1784 ccb->Interpret = 1;
1785 ccb->reqlen = htonl(sizeof(struct scsi_sense_data));
1786 ccb->cp_statDMA = htonl(vtophys(&ccb->cp_statDMA));
1787 ccb->cp_reqDMA = htonl(vtophys(&ccb->cp_reqDMA));
1788 ccb->cp_viraddr = (u_int32_t) & ccb;
1789
1790 ccb->cp_msg[0] = HA_IDENTIFY_MSG | HA_DISCO_RECO;
1791 ccb->cp_scsi_cmd = 0; /* Should be ignored */
1792
1793 /* Lock up the submitted queue. We are very persistant here */
1794 crit_enter();
1795 while (dpt->queue_status & DPT_SUBMITTED_QUEUE_ACTIVE) {
1796 DELAY(100);
1797 }
1798
1799 dpt->queue_status |= DPT_SUBMITTED_QUEUE_ACTIVE;
1800 crit_exit();
1801
1802 /* Send the RESET message */
1803 if ((result = dpt_send_eata_command(dpt, &dccb.eata_ccb,
1804 EATA_CMD_RESET, 0, 0, 0, 0)) != 0) {
1805 kprintf("dpt%d: Failed to send the RESET message.\n"
1806 " Trying cold boot (ouch!)\n", dpt->unit);
1807
1808
1809 if ((result = dpt_send_eata_command(dpt, &dccb.eata_ccb,
1810 EATA_COLD_BOOT, 0, 0,
1811 0, 0)) != 0) {
1812 panic("dpt%d: Faild to cold boot the HBA\n",
1813 dpt->unit);
1814 }
1815 #ifdef DPT_MEASURE_PERFORMANCE
1816 dpt->performance.cold_boots++;
1817 #endif /* DPT_MEASURE_PERFORMANCE */
1818 }
1819
1820 #ifdef DPT_MEASURE_PERFORMANCE
1821 dpt->performance.warm_starts++;
1822 #endif /* DPT_MEASURE_PERFORMANCE */
1823
1824 kprintf("dpt%d: Aborting pending requests. O/S should re-submit\n",
1825 dpt->unit);
1826
1827 while ((dccbp = TAILQ_FIRST(&dpt->completed_ccbs)) != NULL) {
1828 struct scsi_xfer *xs = dccbp->xs;
1829
1830 /* Not all transactions have xs structs */
1831 if (xs != NULL) {
1832 /* Tell the kernel proper this did not complete well */
1833 xs->error |= XS_SELTIMEOUT;
1834 xs->flags |= SCSI_ITSDONE;
1835 scsi_done(xs);
1836 }
1837
1838 dpt_Qremove_submitted(dpt, dccbp);
1839
1840 /* Remember, Callbacks are NOT in the standard queue */
1841 if (dccbp->std_callback != NULL) {
1842 (dccbp->std_callback)(dpt, dccbp->eata_ccb.cp_channel,
1843 dccbp);
1844 } else {
1845 crit_enter();
1846 dpt_Qpush_free(dpt, dccbp);
1847 crit_exit();
1848 }
1849 }
1850
1851 kprintf("dpt%d: reset done aborting all pending commands\n", dpt->unit);
1852 dpt->queue_status &= ~DPT_SUBMITTED_QUEUE_ACTIVE;
1853 }
1854
1855 #endif /* DPT_RESET_HBA */
1856
1857 /*
1858 * Build a Command Block for target mode READ/WRITE BUFFER,
1859 * with the ``sync'' bit ON.
1860 *
1861 * Although the length and offset are 24 bit fields in the command, they cannot
1862 * exceed 8192 bytes, so we take them as short integers andcheck their range.
1863 * If they are sensless, we round them to zero offset, maximum length and
1864 * complain.
1865 */
1866
1867 static void
1868 dpt_target_ccb(dpt_softc_t * dpt, int bus, u_int8_t target, u_int8_t lun,
1869 dpt_ccb_t * ccb, int mode, u_int8_t command,
1870 u_int16_t length, u_int16_t offset)
1871 {
1872 eata_ccb_t *cp;
1873
1874 if ((length + offset) > DPT_MAX_TARGET_MODE_BUFFER_SIZE) {
1875 kprintf("dpt%d: Length of %d, and offset of %d are wrong\n",
1876 dpt->unit, length, offset);
1877 length = DPT_MAX_TARGET_MODE_BUFFER_SIZE;
1878 offset = 0;
1879 }
1880 ccb->xs = NULL;
1881 ccb->flags = 0;
1882 ccb->state = DPT_CCB_STATE_NEW;
1883 ccb->std_callback = (ccb_callback) dpt_target_done;
1884 ccb->wrbuff_callback = NULL;
1885
1886 cp = &ccb->eata_ccb;
1887 cp->CP_OpCode = EATA_CMD_DMA_SEND_CP;
1888 cp->SCSI_Reset = 0;
1889 cp->HBA_Init = 0;
1890 cp->Auto_Req_Sen = 1;
1891 cp->cp_id = target;
1892 cp->DataIn = 1;
1893 cp->DataOut = 0;
1894 cp->Interpret = 0;
1895 cp->reqlen = htonl(sizeof(struct scsi_sense_data));
1896 cp->cp_statDMA = htonl(vtophys(&cp->cp_statDMA));
1897 cp->cp_reqDMA = htonl(vtophys(&cp->cp_reqDMA));
1898 cp->cp_viraddr = (u_int32_t) & ccb;
1899
1900 cp->cp_msg[0] = HA_IDENTIFY_MSG | HA_DISCO_RECO;
1901
1902 cp->cp_scsi_cmd = command;
1903 cp->cp_cdb[1] = (u_int8_t) (mode & SCSI_TM_MODE_MASK);
1904 cp->cp_lun = lun; /* Order is important here! */
1905 cp->cp_cdb[2] = 0x00; /* Buffer Id, only 1 :-( */
1906 cp->cp_cdb[3] = (length >> 16) & 0xFF; /* Buffer offset MSB */
1907 cp->cp_cdb[4] = (length >> 8) & 0xFF;
1908 cp->cp_cdb[5] = length & 0xFF;
1909 cp->cp_cdb[6] = (length >> 16) & 0xFF; /* Length MSB */
1910 cp->cp_cdb[7] = (length >> 8) & 0xFF;
1911 cp->cp_cdb[8] = length & 0xFF; /* Length LSB */
1912 cp->cp_cdb[9] = 0; /* No sync, no match bits */
1913
1914 /*
1915 * This could be optimized to live in dpt_register_buffer.
1916 * We keep it here, just in case the kernel decides to reallocate pages
1917 */
1918 if (dpt_scatter_gather(dpt, ccb, DPT_RW_BUFFER_SIZE,
1919 dpt->rw_buffer[bus][target][lun])) {
1920 kprintf("dpt%d: Failed to setup Scatter/Gather for "
1921 "Target-Mode buffer\n", dpt->unit);
1922 }
1923 }
1924
1925 /* Setup a target mode READ command */
1926
1927 static void
1928 dpt_set_target(int redo, dpt_softc_t * dpt,
1929 u_int8_t bus, u_int8_t target, u_int8_t lun, int mode,
1930 u_int16_t length, u_int16_t offset, dpt_ccb_t * ccb)
1931 {
1932 if (dpt->target_mode_enabled) {
1933 crit_enter();
1934
1935 if (!redo)
1936 dpt_target_ccb(dpt, bus, target, lun, ccb, mode,
1937 SCSI_TM_READ_BUFFER, length, offset);
1938
1939 ccb->transaction_id = ++dpt->commands_processed;
1940
1941 #ifdef DPT_MEASURE_PERFORMANCE
1942 dpt->performance.command_count[ccb->eata_ccb.cp_scsi_cmd]++;
1943 ccb->command_started = microtime_now;
1944 #endif
1945 dpt_Qadd_waiting(dpt, ccb);
1946 dpt_sched_queue(dpt);
1947
1948 crit_exit();
1949 } else {
1950 kprintf("dpt%d: Target Mode Request, but Target Mode is OFF\n",
1951 dpt->unit);
1952 }
1953 }
1954
1955 /*
1956 * Schedule a buffer to be sent to another target.
1957 * The work will be scheduled and the callback provided will be called when
1958 * the work is actually done.
1959 *
1960 * Please NOTE: ``Anyone'' can send a buffer, but only registered clients
1961 * get notified of receipt of buffers.
1962 */
1963
1964 int
1965 dpt_send_buffer(int unit, u_int8_t channel, u_int8_t target, u_int8_t lun,
1966 u_int8_t mode, u_int16_t length, u_int16_t offset, void *data,
1967 buff_wr_done callback)
1968 {
1969 dpt_softc_t *dpt;
1970 dpt_ccb_t *ccb = NULL;
1971
1972 /* This is an external call. Be a bit paranoid */
1973 for (dpt = TAILQ_FIRST(&dpt_softc_list);
1974 dpt != NULL;
1975 dpt = TAILQ_NEXT(dpt, links)) {
1976 if (dpt->unit == unit)
1977 goto valid_unit;
1978 }
1979
1980 return (INVALID_UNIT);
1981
1982 valid_unit:
1983
1984 if (dpt->target_mode_enabled) {
1985 if ((channel >= dpt->channels) || (target > dpt->max_id) ||
1986 (lun > dpt->max_lun)) {
1987 return (INVALID_SENDER);
1988 }
1989 if ((dpt->rw_buffer[channel][target][lun] == NULL) ||
1990 (dpt->buffer_receiver[channel][target][lun] == NULL))
1991 return (NOT_REGISTERED);
1992
1993 crit_enter();
1994 /* Process the free list */
1995 if ((TAILQ_EMPTY(&dpt->free_ccbs)) && dpt_alloc_freelist(dpt)) {
1996 kprintf("dpt%d ERROR: Cannot allocate any more free CCB's.\n"
1997 " Please try later\n",
1998 dpt->unit);
1999 crit_exit();
2000 return (NO_RESOURCES);
2001 }
2002 /* Now grab the newest CCB */
2003 if ((ccb = dpt_Qpop_free(dpt)) == NULL) {
2004 crit_exit();
2005 panic("dpt%d: Got a NULL CCB from pop_free()\n", dpt->unit);
2006 }
2007 crit_exit();
2008
2009 bcopy(dpt->rw_buffer[channel][target][lun] + offset, data, length);
2010 dpt_target_ccb(dpt, channel, target, lun, ccb, mode,
2011 SCSI_TM_WRITE_BUFFER,
2012 length, offset);
2013 ccb->std_callback = (ccb_callback) callback; /* Potential trouble */
2014
2015 crit_enter();
2016 ccb->transaction_id = ++dpt->commands_processed;
2017
2018 #ifdef DPT_MEASURE_PERFORMANCE
2019 dpt->performance.command_count[ccb->eata_ccb.cp_scsi_cmd]++;
2020 ccb->command_started = microtime_now;
2021 #endif
2022 dpt_Qadd_waiting(dpt, ccb);
2023 dpt_sched_queue(dpt);
2024
2025 crit_exit();
2026 return (0);
2027 }
2028 return (DRIVER_DOWN);
2029 }
2030
2031 static void
2032 dpt_target_done(dpt_softc_t * dpt, int bus, dpt_ccb_t * ccb)
2033 {
2034 eata_ccb_t *cp;
2035
2036 cp = &ccb->eata_ccb;
2037
2038 /*
2039 * Remove the CCB from the waiting queue.
2040 * We do NOT put it back on the free, etc., queues as it is a special
2041 * ccb, owned by the dpt_softc of this unit.
2042 */
2043 crit_enter();
2044 dpt_Qremove_completed(dpt, ccb);
2045 crit_exit();
2046
2047 #define br_channel (ccb->eata_ccb.cp_channel)
2048 #define br_target (ccb->eata_ccb.cp_id)
2049 #define br_lun (ccb->eata_ccb.cp_LUN)
2050 #define br_index [br_channel][br_target][br_lun]
2051 #define read_buffer_callback (dpt->buffer_receiver br_index )
2052 #define read_buffer (dpt->rw_buffer[br_channel][br_target][br_lun])
2053 #define cb(offset) (ccb->eata_ccb.cp_cdb[offset])
2054 #define br_offset ((cb(3) << 16) | (cb(4) << 8) | cb(5))
2055 #define br_length ((cb(6) << 16) | (cb(7) << 8) | cb(8))
2056
2057 /* Different reasons for being here, you know... */
2058 switch (ccb->eata_ccb.cp_scsi_cmd) {
2059 case SCSI_TM_READ_BUFFER:
2060 if (read_buffer_callback != NULL) {
2061 /* This is a buffer generated by a kernel process */
2062 read_buffer_callback(dpt->unit, br_channel,
2063 br_target, br_lun,
2064 read_buffer,
2065 br_offset, br_length);
2066 } else {
2067 /*
2068 * This is a buffer waited for by a user (sleeping)
2069 * command
2070 */
2071 wakeup(ccb);
2072 }
2073
2074 /* We ALWAYS re-issue the same command; args are don't-care */
2075 dpt_set_target(1, 0, 0, 0, 0, 0, 0, 0, 0);
2076 break;
2077
2078 case SCSI_TM_WRITE_BUFFER:
2079 (ccb->wrbuff_callback) (dpt->unit, br_channel, br_target,
2080 br_offset, br_length,
2081 br_lun, ccb->status_packet.hba_stat);
2082 break;
2083 default:
2084 kprintf("dpt%d: %s is an unsupported command for target mode\n",
2085 dpt->unit, scsi_cmd_name(ccb->eata_ccb.cp_scsi_cmd));
2086 }
2087 crit_enter();
2088 dpt->target_ccb[br_channel][br_target][br_lun] = NULL;
2089 dpt_Qpush_free(dpt, ccb);
2090 crit_exit();
2091 }
2092
2093
2094 /*
2095 * Use this function to register a client for a buffer read target operation.
2096 * The function you register will be called every time a buffer is received
2097 * by the target mode code.
2098 */
2099 dpt_rb_t
2100 dpt_register_buffer(int unit, u_int8_t channel, u_int8_t target, u_int8_t lun,
2101 u_int8_t mode, u_int16_t length, u_int16_t offset,
2102 dpt_rec_buff callback, dpt_rb_op_t op)
2103 {
2104 dpt_softc_t *dpt;
2105 dpt_ccb_t *ccb = NULL;
2106
2107 for (dpt = TAILQ_FIRST(&dpt_softc_list);
2108 dpt != NULL;
2109 dpt = TAILQ_NEXT(dpt, links)) {
2110 if (dpt->unit == unit)
2111 goto valid_unit;
2112 }
2113
2114 return (INVALID_UNIT);
2115
2116 valid_unit:
2117
2118 if (dpt->state & DPT_HA_SHUTDOWN_ACTIVE)
2119 return (DRIVER_DOWN);
2120
2121 if ((channel > (dpt->channels - 1)) || (target > (dpt->max_id - 1)) ||
2122 (lun > (dpt->max_lun - 1)))
2123 return (INVALID_SENDER);
2124
2125 if (dpt->buffer_receiver[channel][target][lun] == NULL) {
2126 if (op == REGISTER_BUFFER) {
2127 /* Assign the requested callback */
2128 dpt->buffer_receiver[channel][target][lun] = callback;
2129 /* Get a CCB */
2130 crit_enter();
2131
2132 /* Process the free list */
2133 if ((TAILQ_EMPTY(&dpt->free_ccbs)) && dpt_alloc_freelist(dpt)) {
2134 kprintf("dpt%d ERROR: Cannot allocate any more free CCB's.\n"
2135 " Please try later\n",
2136 dpt->unit);
2137 crit_exit();
2138 return (NO_RESOURCES);
2139 }
2140 /* Now grab the newest CCB */
2141 if ((ccb = dpt_Qpop_free(dpt)) == NULL) {
2142 crit_exit();
2143 panic("dpt%d: Got a NULL CCB from pop_free()\n",
2144 dpt->unit);
2145 }
2146 crit_exit();
2147
2148 /* Clean up the leftover of the previous tenant */
2149 ccb->status = DPT_CCB_STATE_NEW;
2150 dpt->target_ccb[channel][target][lun] = ccb;
2151
2152 dpt->rw_buffer[channel][target][lun] =
2153 kmalloc(DPT_RW_BUFFER_SIZE, M_DEVBUF, M_INTWAIT);
2154 dpt_set_target(0, dpt, channel, target, lun, mode,
2155 length, offset, ccb);
2156 return (SUCCESSFULLY_REGISTERED);
2157 } else
2158 return (NOT_REGISTERED);
2159 } else {
2160 if (op == REGISTER_BUFFER) {
2161 if (dpt->buffer_receiver[channel][target][lun] == callback)
2162 return (ALREADY_REGISTERED);
2163 else
2164 return (REGISTERED_TO_ANOTHER);
2165 } else {
2166 if (dpt->buffer_receiver[channel][target][lun] == callback) {
2167 dpt->buffer_receiver[channel][target][lun] = NULL;
2168 crit_enter();
2169 dpt_Qpush_free(dpt, ccb);
2170 crit_exit();
2171 kfree(dpt->rw_buffer[channel][target][lun], M_DEVBUF);
2172 return (SUCCESSFULLY_REGISTERED);
2173 } else
2174 return (INVALID_CALLBACK);
2175 }
2176
2177 }
2178 }
2179
2180 /* Return the state of the blinking DPT LED's */
2181 u_int8_t
2182 dpt_blinking_led(dpt_softc_t * dpt)
2183 {
2184 int ndx;
2185 u_int32_t state;
2186 u_int32_t previous;
2187 u_int8_t result;
2188
2189 crit_enter();
2190
2191 result = 0;
2192
2193 for (ndx = 0, state = 0, previous = 0;
2194 (ndx < 10) && (state != previous);
2195 ndx++) {
2196 previous = state;
2197 state = dpt_inl(dpt, 1);
2198 }
2199
2200 if ((state == previous) && (state == DPT_BLINK_INDICATOR))
2201 result = dpt_inb(dpt, 5);
2202
2203 crit_exit();
2204 return (result);
2205 }
2206
2207 /*
2208 * Execute a command which did not come from the kernel's SCSI layer.
2209 * The only way to map user commands to bus and target is to comply with the
2210 * standard DPT wire-down scheme:
2211 */
2212 int
2213 dpt_user_cmd(dpt_softc_t * dpt, eata_pt_t * user_cmd,
2214 caddr_t cmdarg, int minor_no)
2215 {
2216 dpt_ccb_t *ccb;
2217 void *data;
2218 int channel, target, lun;
2219 int huh;
2220 int result;
2221 int submitted;
2222
2223 data = NULL;
2224 channel = minor2hba(minor_no);
2225 target = minor2target(minor_no);
2226 lun = minor2lun(minor_no);
2227
2228 if ((channel > (dpt->channels - 1))
2229 || (target > dpt->max_id)
2230 || (lun > dpt->max_lun))
2231 return (ENXIO);
2232
2233 if (target == dpt->sc_scsi_link[channel].adapter_targ) {
2234 /* This one is for the controller itself */
2235 if ((user_cmd->eataID[0] != 'E')
2236 || (user_cmd->eataID[1] != 'A')
2237 || (user_cmd->eataID[2] != 'T')
2238 || (user_cmd->eataID[3] != 'A')) {
2239 return (ENXIO);
2240 }
2241 }
2242 /* Get a DPT CCB, so we can prepare a command */
2243 crit_enter();
2244
2245 /* Process the free list */
2246 if ((TAILQ_EMPTY(&dpt->free_ccbs)) && dpt_alloc_freelist(dpt)) {
2247 kprintf("dpt%d ERROR: Cannot allocate any more free CCB's.\n"
2248 " Please try later\n",
2249 dpt->unit);
2250 crit_exit();
2251 return (EFAULT);
2252 }
2253 /* Now grab the newest CCB */
2254 if ((ccb = dpt_Qpop_free(dpt)) == NULL) {
2255 crit_exit();
2256 panic("dpt%d: Got a NULL CCB from pop_free()\n", dpt->unit);
2257 } else {
2258 crit_exit();
2259 /* Clean up the leftover of the previous tenant */
2260 ccb->status = DPT_CCB_STATE_NEW;
2261 }
2262
2263 bcopy((caddr_t) & user_cmd->command_packet, (caddr_t) & ccb->eata_ccb,
2264 sizeof(eata_ccb_t));
2265
2266 /* We do not want to do user specified scatter/gather. Why?? */
2267 if (ccb->eata_ccb.scatter == 1)
2268 return (EINVAL);
2269
2270 ccb->eata_ccb.Auto_Req_Sen = 1;
2271 ccb->eata_ccb.reqlen = htonl(sizeof(struct scsi_sense_data));
2272 ccb->eata_ccb.cp_datalen = htonl(sizeof(ccb->eata_ccb.cp_datalen));
2273 ccb->eata_ccb.cp_dataDMA = htonl(vtophys(ccb->eata_ccb.cp_dataDMA));
2274 ccb->eata_ccb.cp_statDMA = htonl(vtophys(&ccb->eata_ccb.cp_statDMA));
2275 ccb->eata_ccb.cp_reqDMA = htonl(vtophys(&ccb->eata_ccb.cp_reqDMA));
2276 ccb->eata_ccb.cp_viraddr = (u_int32_t) & ccb;
2277
2278 if (ccb->eata_ccb.DataIn || ccb->eata_ccb.DataOut) {
2279 /* Data I/O is involved in this command. Alocate buffer */
2280 if (ccb->eata_ccb.cp_datalen > PAGE_SIZE) {
2281 data = contigmalloc(ccb->eata_ccb.cp_datalen,
2282 M_TEMP, M_WAITOK, 0, ~0,
2283 ccb->eata_ccb.cp_datalen,
2284 0x10000);
2285 } else {
2286 data = kmalloc(ccb->eata_ccb.cp_datalen, M_TEMP,
2287 M_WAITOK);
2288 }
2289
2290 if (data == NULL) {
2291 kprintf("dpt%d: Cannot allocate %d bytes "
2292 "for EATA command\n", dpt->unit,
2293 ccb->eata_ccb.cp_datalen);
2294 return (EFAULT);
2295 }
2296 #define usr_cmd_DMA (caddr_t)user_cmd->command_packet.cp_dataDMA
2297 if (ccb->eata_ccb.DataIn == 1) {
2298 if (copyin(usr_cmd_DMA,
2299 data, ccb->eata_ccb.cp_datalen) == -1)
2300 return (EFAULT);
2301 }
2302 } else {
2303 /* No data I/O involved here. Make sure the DPT knows that */
2304 ccb->eata_ccb.cp_datalen = 0;
2305 data = NULL;
2306 }
2307
2308 if (ccb->eata_ccb.FWNEST == 1)
2309 ccb->eata_ccb.FWNEST = 0;
2310
2311 if (ccb->eata_ccb.cp_datalen != 0) {
2312 if (dpt_scatter_gather(dpt, ccb, ccb->eata_ccb.cp_datalen,
2313 data) != 0) {
2314 if (data != NULL)
2315 kfree(data, M_TEMP);
2316 return (EFAULT);
2317 }
2318 }
2319 /**
2320 * We are required to quiet a SCSI bus.
2321 * since we do not queue comands on a bus basis,
2322 * we wait for ALL commands on a controller to complete.
2323 * In the mean time, sched_queue() will not schedule new commands.
2324 */
2325 if ((ccb->eata_ccb.cp_cdb[0] == MULTIFUNCTION_CMD)
2326 && (ccb->eata_ccb.cp_cdb[2] == BUS_QUIET)) {
2327 /* We wait for ALL traffic for this HBa to subside */
2328 crit_enter();
2329 dpt->state |= DPT_HA_QUIET;
2330 crit_exit();
2331
2332 while ((submitted = dpt->submitted_ccbs_count) != 0) {
2333 huh = tsleep((void *) dpt, PCATCH, "dptqt", 100 * hz);
2334 switch (huh) {
2335 case 0:
2336 /* Wakeup call received */
2337 break;
2338 case EWOULDBLOCK:
2339 /* Timer Expired */
2340 break;
2341 default:
2342 /* anything else */
2343 break;
2344 }
2345 }
2346 }
2347 /* Resume normal operation */
2348 if ((ccb->eata_ccb.cp_cdb[0] == MULTIFUNCTION_CMD)
2349 && (ccb->eata_ccb.cp_cdb[2] == BUS_UNQUIET)) {
2350 crit_enter();
2351 dpt->state &= ~DPT_HA_QUIET;
2352 crit_exit();
2353 }
2354 /**
2355 * Schedule the command and submit it.
2356 * We bypass dpt_sched_queue, as it will block on DPT_HA_QUIET
2357 */
2358 ccb->xs = NULL;
2359 ccb->flags = 0;
2360 ccb->eata_ccb.Auto_Req_Sen = 1; /* We always want this feature */
2361
2362 ccb->transaction_id = ++dpt->commands_processed;
2363 ccb->std_callback = (ccb_callback) dpt_user_cmd_done;
2364 ccb->result = (u_int32_t) & cmdarg;
2365 ccb->data = data;
2366
2367 #ifdef DPT_MEASURE_PERFORMANCE
2368 ++dpt->performance.command_count[ccb->eata_ccb.cp_scsi_cmd];
2369 ccb->command_started = microtime_now;
2370 #endif
2371 crit_enter();
2372 dpt_Qadd_waiting(dpt, ccb);
2373 crit_exit();
2374
2375 dpt_sched_queue(dpt);
2376
2377 /* Wait for the command to complete */
2378 (void) tsleep((void *) ccb, PCATCH, "dptucw", 100 * hz);
2379
2380 /* Free allocated memory */
2381 if (data != NULL)
2382 kfree(data, M_TEMP);
2383
2384 return (0);
2385 }
2386
2387 static void
2388 dpt_user_cmd_done(dpt_softc_t * dpt, int bus, dpt_ccb_t * ccb)
2389 {
2390 u_int32_t result;
2391 caddr_t cmd_arg;
2392
2393 crit_enter();
2394
2395 /**
2396 * If Auto Request Sense is on, copyout the sense struct
2397 */
2398 #define usr_pckt_DMA (caddr_t)(intptr_t)ntohl(ccb->eata_ccb.cp_reqDMA)
2399 #define usr_pckt_len ntohl(ccb->eata_ccb.cp_datalen)
2400 if (ccb->eata_ccb.Auto_Req_Sen == 1) {
2401 if (copyout((caddr_t) & ccb->sense_data, usr_pckt_DMA,
2402 sizeof(struct scsi_sense_data))) {
2403 ccb->result = EFAULT;
2404 dpt_Qpush_free(dpt, ccb);
2405 crit_exit();
2406 wakeup(ccb);
2407 return;
2408 }
2409 }
2410 /* If DataIn is on, copyout the data */
2411 if ((ccb->eata_ccb.DataIn == 1)
2412 && (ccb->status_packet.hba_stat == HA_NO_ERROR)) {
2413 if (copyout(ccb->data, usr_pckt_DMA, usr_pckt_len)) {
2414 dpt_Qpush_free(dpt, ccb);
2415 ccb->result = EFAULT;
2416
2417 crit_exit();
2418 wakeup(ccb);
2419 return;
2420 }
2421 }
2422 /* Copyout the status */
2423 result = ccb->status_packet.hba_stat;
2424 cmd_arg = (caddr_t) ccb->result;
2425
2426 if (copyout((caddr_t) & result, cmd_arg, sizeof(result))) {
2427 dpt_Qpush_free(dpt, ccb);
2428 ccb->result = EFAULT;
2429 crit_exit();
2430 wakeup(ccb);
2431 return;
2432 }
2433 /* Put the CCB back in the freelist */
2434 ccb->state |= DPT_CCB_STATE_COMPLETED;
2435 dpt_Qpush_free(dpt, ccb);
2436
2437 /* Free allocated memory */
2438 crit_exit();
2439 return;
2440 }
2441
2442 #ifdef DPT_HANDLE_TIMEOUTS
2443 /**
2444 * This function walks down the SUBMITTED queue.
2445 * Every request that is too old gets aborted and marked.
2446 * Since the DPT will complete (interrupt) immediately (what does that mean?),
2447 * We just walk the list, aborting old commands and marking them as such.
2448 * The dpt_complete function will get rid of the that were interrupted in the
2449 * normal manner.
2450 *
2451 * This function needs to run at splcam(), as it interacts with the submitted
2452 * queue, as well as the completed and free queues. Just like dpt_intr() does.
2453 * To run it at any ISPL other than that of dpt_intr(), will mean that dpt_intr
2454 * willbe able to pre-empt it, grab a transaction in progress (towards
2455 * destruction) and operate on it. The state of this transaction will be not
2456 * very clear.
2457 * The only other option, is to lock it only as long as necessary but have
2458 * dpt_intr() spin-wait on it. In a UP environment this makes no sense and in
2459 * a SMP environment, the advantage is dubvious for a function that runs once
2460 * every ten seconds for few microseconds and, on systems with healthy
2461 * hardware, does not do anything anyway.
2462 */
2463
2464 static void
2465 dpt_handle_timeouts(dpt_softc_t * dpt)
2466 {
2467 dpt_ccb_t *ccb;
2468
2469 crit_enter();
2470
2471 if (dpt->state & DPT_HA_TIMEOUTS_ACTIVE) {
2472 kprintf("dpt%d WARNING: Timeout Handling Collision\n",
2473 dpt->unit);
2474 crit_exit();
2475 return;
2476 }
2477 dpt->state |= DPT_HA_TIMEOUTS_ACTIVE;
2478
2479 /* Loop through the entire submitted queue, looking for lost souls */
2480 for (ccb = TAILQ_FIRST(&dpt->submitted_ccbs);
2481 ccb != NULL;
2482 ccb = TAILQ_NEXT(ccb, links)) {
2483 struct scsi_xfer *xs;
2484 u_int32_t age, max_age;
2485
2486 xs = ccb->xs;
2487 age = dpt_time_delta(ccb->command_started, microtime_now);
2488
2489 #define TenSec 10000000
2490
2491 if (xs == NULL) { /* Local, non-kernel call */
2492 max_age = TenSec;
2493 } else {
2494 max_age = (((xs->timeout * (dpt->submitted_ccbs_count
2495 + DPT_TIMEOUT_FACTOR))
2496 > TenSec)
2497 ? (xs->timeout * (dpt->submitted_ccbs_count
2498 + DPT_TIMEOUT_FACTOR))
2499 : TenSec);
2500 }
2501
2502 /*
2503 * If a transaction is marked lost and is TWICE as old as we
2504 * care, then, and only then do we destroy it!
2505 */
2506 if (ccb->state & DPT_CCB_STATE_MARKED_LOST) {
2507 /* Remember who is next */
2508 if (age > (max_age * 2)) {
2509 dpt_Qremove_submitted(dpt, ccb);
2510 ccb->state &= ~DPT_CCB_STATE_MARKED_LOST;
2511 ccb->state |= DPT_CCB_STATE_ABORTED;
2512 #define cmd_name scsi_cmd_name(ccb->eata_ccb.cp_scsi_cmd)
2513 if (ccb->retries++ > DPT_RETRIES) {
2514 kprintf("dpt%d ERROR: Destroying stale "
2515 "%d (%s)\n"
2516 " on "
2517 "c%db%dt%du%d (%d/%d)\n",
2518 dpt->unit, ccb->transaction_id,
2519 cmd_name,
2520 dpt->unit,
2521 ccb->eata_ccb.cp_channel,
2522 ccb->eata_ccb.cp_id,
2523 ccb->eata_ccb.cp_LUN, age,
2524 ccb->retries);
2525 #define send_ccb &ccb->eata_ccb
2526 #define ESA EATA_SPECIFIC_ABORT
2527 (void) dpt_send_immediate(dpt,
2528 send_ccb,
2529 ESA,
2530 0, 0);
2531 dpt_Qpush_free(dpt, ccb);
2532
2533 /* The SCSI layer should re-try */
2534 xs->error |= XS_TIMEOUT;
2535 xs->flags |= SCSI_ITSDONE;
2536 scsi_done(xs);
2537 } else {
2538 kprintf("dpt%d ERROR: Stale %d (%s) on "
2539 "c%db%dt%du%d (%d)\n"
2540 " gets another "
2541 "chance(%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,
2548 age, ccb->retries, DPT_RETRIES);
2549
2550 dpt_Qpush_waiting(dpt, ccb);
2551 dpt_sched_queue(dpt);
2552 }
2553 }
2554 } else {
2555 /*
2556 * This is a transaction that is not to be destroyed
2557 * (yet) But it is too old for our liking. We wait as
2558 * long as the upper layer thinks. Not really, we
2559 * multiply that by the number of commands in the
2560 * submitted queue + 1.
2561 */
2562 if (!(ccb->state & DPT_CCB_STATE_MARKED_LOST) &&
2563 (age != ~0) && (age > max_age)) {
2564 kprintf("dpt%d ERROR: Marking %d (%s) on "
2565 "c%db%dt%du%d \n"
2566 " as late after %dusec\n",
2567 dpt->unit, ccb->transaction_id,
2568 cmd_name,
2569 dpt->unit, ccb->eata_ccb.cp_channel,
2570 ccb->eata_ccb.cp_id,
2571 ccb->eata_ccb.cp_LUN, age);
2572 ccb->state |= DPT_CCB_STATE_MARKED_LOST;
2573 }
2574 }
2575 }
2576
2577 dpt->state &= ~DPT_HA_TIMEOUTS_ACTIVE;
2578 crit_exit();
2579 }
2580
2581 #endif /* DPT_HANDLE_TIMEOUTS */
2582
2583 #endif
DragonFly BSD