2 * Copyright (c) 2000 Michael Smith
3 * Copyright (c) 2003 Paul Saab
4 * Copyright (c) 2003 Vinod Kashyap
5 * Copyright (c) 2000 BSDi
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * $FreeBSD: src/sys/dev/twe/twe.c,v 1.1.2.10 2004/06/11 18:57:31 vkashyap Exp $
30 * $DragonFly: src/sys/dev/raid/twe/twe.c,v 1.12 2005/08/22 21:16:20 hmp Exp $
34 * Driver for the 3ware Escalade family of IDE RAID controllers.
37 #include <dev/raid/twe/twe_compat.h>
38 #include <dev/raid/twe/twereg.h>
39 #define TWE_DEFINE_TABLES
40 #include <dev/raid/twe/twe_tables.h>
41 #include <dev/raid/twe/tweio.h>
42 #include <dev/raid/twe/twevar.h>
47 static int twe_get_param_1(struct twe_softc *sc, int table_id, int param_id, u_int8_t *result);
48 static int twe_get_param_2(struct twe_softc *sc, int table_id, int param_id, u_int16_t *result);
49 static int twe_get_param_4(struct twe_softc *sc, int table_id, int param_id, u_int32_t *result);
50 static void *twe_get_param(struct twe_softc *sc, int table_id, int parameter_id, size_t size,
51 void (* func)(struct twe_request *tr));
52 #ifdef TWE_SHUTDOWN_NOTIFICATION
53 static int twe_set_param_1(struct twe_softc *sc, int table_id, int param_id, u_int8_t value);
56 static int twe_set_param_2(struct twe_softc *sc, int table_id, int param_id, u_int16_t value);
57 static int twe_set_param_4(struct twe_softc *sc, int table_id, int param_id, u_int32_t value);
59 static int twe_set_param(struct twe_softc *sc, int table_id, int param_id, int param_size,
61 static int twe_init_connection(struct twe_softc *sc, int mode);
62 static int twe_wait_request(struct twe_request *tr);
63 static int twe_immediate_request(struct twe_request *tr);
64 static void twe_completeio(struct twe_request *tr);
65 static void twe_reset(struct twe_softc *sc);
66 static int twe_add_unit(struct twe_softc *sc, int unit);
67 static int twe_del_unit(struct twe_softc *sc, int unit);
70 * Command I/O to controller.
72 static void twe_done(struct twe_softc *sc);
73 static void twe_complete(struct twe_softc *sc);
74 static int twe_wait_status(struct twe_softc *sc, u_int32_t status, int timeout);
75 static int twe_drain_response_queue(struct twe_softc *sc);
76 static int twe_check_bits(struct twe_softc *sc, u_int32_t status_reg);
77 static int twe_soft_reset(struct twe_softc *sc);
82 static void twe_host_intr(struct twe_softc *sc);
83 static void twe_attention_intr(struct twe_softc *sc);
84 static void twe_command_intr(struct twe_softc *sc);
87 * Asynchronous event handling.
89 static int twe_fetch_aen(struct twe_softc *sc);
90 static void twe_handle_aen(struct twe_request *tr);
91 static void twe_enqueue_aen(struct twe_softc *sc, u_int16_t aen);
92 static u_int16_t twe_dequeue_aen(struct twe_softc *sc);
93 static int twe_drain_aen_queue(struct twe_softc *sc);
94 static int twe_find_aen(struct twe_softc *sc, u_int16_t aen);
97 * Command buffer management.
99 static int twe_get_request(struct twe_softc *sc, struct twe_request **tr);
100 static void twe_release_request(struct twe_request *tr);
105 static char *twe_format_aen(struct twe_softc *sc, u_int16_t aen);
106 static int twe_report_request(struct twe_request *tr);
107 static void twe_panic(struct twe_softc *sc, char *reason);
109 /********************************************************************************
110 ********************************************************************************
112 ********************************************************************************
113 ********************************************************************************/
115 /********************************************************************************
116 * Initialise the controller, set up driver data structures.
119 twe_setup(struct twe_softc *sc)
121 struct twe_request *tr;
122 u_int32_t status_reg;
128 * Initialise request queues.
134 twe_initq_complete(sc);
135 sc->twe_wait_aen = -1;
138 * Allocate request structures up front.
140 for (i = 0; i < TWE_Q_LENGTH; i++) {
141 if ((tr = twe_allocate_request(sc)) == NULL)
144 * Set global defaults that won't change.
146 tr->tr_command.generic.host_id = sc->twe_host_id; /* controller-assigned host ID */
147 tr->tr_command.generic.request_id = i; /* our index number */
148 sc->twe_lookup[i] = tr;
151 * Put command onto the freelist.
153 twe_release_request(tr);
157 * Check status register for errors, clear them.
159 status_reg = TWE_STATUS(sc);
160 twe_check_bits(sc, status_reg);
163 * Wait for the controller to come ready.
165 if (twe_wait_status(sc, TWE_STATUS_MICROCONTROLLER_READY, 60)) {
166 twe_printf(sc, "microcontroller not ready\n");
171 * Disable interrupts from the card.
173 twe_disable_interrupts(sc);
176 * Soft reset the controller, look for the AEN acknowledging the reset,
177 * check for errors, drain the response queue.
179 for (i = 0; i < TWE_MAX_RESET_TRIES; i++) {
182 twe_printf(sc, "reset %d failed, trying again\n", i);
184 if (!twe_soft_reset(sc))
185 break; /* reset process complete */
187 /* did we give up? */
188 if (i >= TWE_MAX_RESET_TRIES) {
189 twe_printf(sc, "can't initialise controller, giving up\n");
197 twe_add_unit(struct twe_softc *sc, int unit)
199 struct twe_drive *dr;
202 TWE_Param *drives = NULL, *param = NULL;
203 TWE_Unit_Descriptor *ud;
206 if (unit < 0 || unit > TWE_MAX_UNITS)
209 * The controller is in a safe state, so try to find drives attached to it.
211 if ((drives = twe_get_param(sc, TWE_PARAM_UNITSUMMARY, TWE_PARAM_UNITSUMMARY_Status,
212 TWE_MAX_UNITS, NULL)) == NULL) {
213 twe_printf(sc, "can't detect attached units\n");
217 dr = &sc->twe_drive[unit];
218 /* check that the drive is online */
219 if (!(drives->data[unit] & TWE_PARAM_UNITSTATUS_Online)) {
224 table = TWE_PARAM_UNITINFO + unit;
226 if (twe_get_param_4(sc, table, TWE_PARAM_UNITINFO_Capacity, &dr->td_size)) {
227 twe_printf(sc, "error fetching capacity for unit %d\n", unit);
231 if (twe_get_param_1(sc, table, TWE_PARAM_UNITINFO_Status, &dr->td_state)) {
232 twe_printf(sc, "error fetching state for unit %d\n", unit);
236 if (twe_get_param_2(sc, table, TWE_PARAM_UNITINFO_DescriptorSize, &dsize)) {
237 twe_printf(sc, "error fetching descriptor size for unit %d\n", unit);
241 if ((param = twe_get_param(sc, table, TWE_PARAM_UNITINFO_Descriptor, dsize - 3, NULL)) == NULL) {
242 twe_printf(sc, "error fetching descriptor for unit %d\n", unit);
246 ud = (TWE_Unit_Descriptor *)param->data;
247 dr->td_type = ud->configuration;
249 /* build synthetic geometry as per controller internal rules */
250 if (dr->td_size > 0x200000) {
257 dr->td_cylinders = dr->td_size / (dr->td_heads * dr->td_sectors);
258 dr->td_twe_unit = unit;
260 error = twe_attach_drive(sc, dr);
264 free(param, M_DEVBUF);
266 free(drives, M_DEVBUF);
271 twe_del_unit(struct twe_softc *sc, int unit)
275 if (unit < 0 || unit >= TWE_MAX_UNITS)
278 if (sc->twe_drive[unit].td_disk == NULL)
281 error = twe_detach_drive(sc, unit);
285 /********************************************************************************
286 * Locate disk devices and attach children to them.
289 twe_init(struct twe_softc *sc)
296 for (i = 0; i < TWE_MAX_UNITS; i++)
300 * Initialise connection with controller.
302 twe_init_connection(sc, TWE_INIT_MESSAGE_CREDITS);
304 #ifdef TWE_SHUTDOWN_NOTIFICATION
306 * Tell the controller we support shutdown notification.
308 twe_set_param_1(sc, TWE_PARAM_FEATURES, TWE_PARAM_FEATURES_DriverShutdown, 1);
312 * Mark controller up and ready to run.
314 sc->twe_state &= ~TWE_STATE_SHUTDOWN;
317 * Finally enable interrupts.
319 twe_enable_interrupts(sc);
322 /********************************************************************************
323 * Stop the controller
326 twe_deinit(struct twe_softc *sc)
329 * Mark the controller as shutting down, and disable any further interrupts.
331 sc->twe_state |= TWE_STATE_SHUTDOWN;
332 twe_disable_interrupts(sc);
334 #ifdef TWE_SHUTDOWN_NOTIFICATION
336 * Disconnect from the controller
338 twe_init_connection(sc, TWE_SHUTDOWN_MESSAGE_CREDITS);
342 /*******************************************************************************
343 * Take an interrupt, or be poked by other code to look for interrupt-worthy
347 twe_intr(struct twe_softc *sc)
349 u_int32_t status_reg;
354 * Collect current interrupt status.
356 status_reg = TWE_STATUS(sc);
357 twe_check_bits(sc, status_reg);
360 * Dispatch based on interrupt status
362 if (status_reg & TWE_STATUS_HOST_INTERRUPT)
364 if (status_reg & TWE_STATUS_ATTENTION_INTERRUPT)
365 twe_attention_intr(sc);
366 if (status_reg & TWE_STATUS_COMMAND_INTERRUPT)
367 twe_command_intr(sc);
368 if (status_reg & TWE_STATUS_RESPONSE_INTERRUPT)
372 /********************************************************************************
373 * Pull as much work off the softc's work queue as possible and give it to the
377 twe_startio(struct twe_softc *sc)
379 struct twe_request *tr;
386 if (sc->twe_state & (TWE_STATE_CTLR_BUSY | TWE_STATE_FRZN))
389 /* spin until something prevents us from doing any work */
392 /* try to get a command that's already ready to go */
393 tr = twe_dequeue_ready(sc);
395 /* build a command from an outstanding bio */
398 /* get a command to handle the bio with */
399 if (twe_get_request(sc, &tr))
402 /* see if there's work to be done */
403 if ((bp = twe_dequeue_bio(sc)) == NULL) {
404 twe_release_request(tr);
408 /* connect the bio to the command */
409 tr->tr_complete = twe_completeio;
411 tr->tr_data = TWE_BIO_DATA(bp);
412 tr->tr_length = TWE_BIO_LENGTH(bp);
413 cmd = &tr->tr_command;
414 if (TWE_BIO_IS_READ(bp)) {
415 tr->tr_flags |= TWE_CMD_DATAIN;
416 cmd->io.opcode = TWE_OP_READ;
418 tr->tr_flags |= TWE_CMD_DATAOUT;
419 cmd->io.opcode = TWE_OP_WRITE;
422 /* build a suitable I/O command (assumes 512-byte rounded transfers) */
424 cmd->io.unit = TWE_BIO_UNIT(bp);
425 cmd->io.block_count = (tr->tr_length + TWE_BLOCK_SIZE - 1) / TWE_BLOCK_SIZE;
426 cmd->io.lba = TWE_BIO_LBA(bp);
429 /* did we find something to do? */
433 /* try to map and submit the command to controller */
434 error = twe_map_request(tr);
439 tr->tr_status = TWE_CMD_ERROR;
440 if (tr->tr_private != NULL) {
441 bp = (twe_bio *)(tr->tr_private);
442 TWE_BIO_SET_ERROR(bp, error);
443 tr->tr_private = NULL;
445 twe_release_request(tr);
446 } else if (tr->tr_flags & TWE_CMD_SLEEPER)
447 wakeup_one(tr); /* wakeup the sleeping owner */
452 /********************************************************************************
453 * Write blocks from memory to disk, for system crash dumps.
456 twe_dump_blocks(struct twe_softc *sc, int unit, u_int32_t lba, void *data, int nblks)
458 struct twe_request *tr;
462 if (twe_get_request(sc, &tr))
466 tr->tr_status = TWE_CMD_SETUP;
467 tr->tr_length = nblks * TWE_BLOCK_SIZE;
468 tr->tr_flags = TWE_CMD_DATAOUT;
470 cmd = &tr->tr_command;
471 cmd->io.opcode = TWE_OP_WRITE;
474 cmd->io.block_count = nblks;
477 error = twe_immediate_request(tr);
479 if (twe_report_request(tr))
481 twe_release_request(tr);
485 /********************************************************************************
486 * Handle controller-specific control operations.
489 twe_ioctl(struct twe_softc *sc, int cmd, void *addr)
491 struct twe_usercommand *tu = (struct twe_usercommand *)addr;
492 struct twe_paramcommand *tp = (struct twe_paramcommand *)addr;
493 struct twe_drivecommand *td = (struct twe_drivecommand *)addr;
494 union twe_statrequest *ts = (union twe_statrequest *)addr;
497 unsigned short *aen_code = (unsigned short *) addr;
498 struct twe_request *tr;
504 /* handle a command from userspace */
507 while (twe_get_request(sc, &tr))
508 tsleep(sc, 0, "twioctl", hz);
511 * Save the command's request ID, copy the user-supplied command in,
512 * restore the request ID.
514 srid = tr->tr_command.generic.request_id;
515 bcopy(&tu->tu_command, &tr->tr_command, sizeof(TWE_Command));
516 tr->tr_command.generic.request_id = srid;
519 * if there's a data buffer, allocate and copy it in.
520 * Must be in multipled of 512 bytes.
522 tr->tr_length = (tu->tu_size + 511) & ~511;
523 if (tr->tr_length > 0) {
524 if ((tr->tr_data = malloc(tr->tr_length, M_DEVBUF, M_WAITOK)) == NULL) {
528 if ((error = copyin(tu->tu_data, tr->tr_data, tu->tu_size)) != 0)
530 tr->tr_flags |= TWE_CMD_DATAIN | TWE_CMD_DATAOUT;
533 /* run the command */
534 error = twe_wait_request(tr);
538 /* copy the command out again */
539 bcopy(&tr->tr_command, &tu->tu_command, sizeof(TWE_Command));
541 /* if there was a data buffer, copy it out */
542 if (tr->tr_length > 0)
543 error = copyout(tr->tr_data, tu->tu_data, tu->tu_size);
547 if (tr->tr_data != NULL)
548 free(tr->tr_data, M_DEVBUF);
550 twe_release_request(tr);
554 /* fetch statistics counter */
556 switch (ts->ts_item) {
557 #ifdef TWE_PERFORMANCE_MONITOR
563 bcopy(&sc->twe_qstat[ts->ts_item], &ts->ts_qstat, sizeof(struct twe_qstat));
572 /* poll for an AEN */
574 *aen_code = twe_dequeue_aen(sc);
577 /* wait for another AEN to show up */
580 while ((*aen_code = twe_dequeue_aen(sc)) == TWE_AEN_QUEUE_EMPTY) {
581 error = tsleep(&sc->twe_aen_queue, PCATCH, "tweaen", 0);
588 case TWEIO_GET_PARAM:
589 if ((param = twe_get_param(sc, tp->tp_table_id, tp->tp_param_id, tp->tp_size, NULL)) == NULL) {
590 twe_printf(sc, "TWEIO_GET_PARAM failed for 0x%x/0x%x/%d\n",
591 tp->tp_table_id, tp->tp_param_id, tp->tp_size);
594 if (param->parameter_size_bytes > tp->tp_size) {
595 twe_printf(sc, "TWEIO_GET_PARAM parameter too large (%d > %d)\n",
596 param->parameter_size_bytes, tp->tp_size);
599 error = copyout(param->data, tp->tp_data, param->parameter_size_bytes);
601 free(param, M_DEVBUF);
605 case TWEIO_SET_PARAM:
606 if ((data = malloc(tp->tp_size, M_DEVBUF, M_WAITOK)) == NULL) {
609 error = copyin(tp->tp_data, data, tp->tp_size);
611 error = twe_set_param(sc, tp->tp_table_id, tp->tp_param_id, tp->tp_size, data);
612 free(data, M_DEVBUF);
621 error = twe_add_unit(sc, td->td_unit);
625 error = twe_del_unit(sc, td->td_unit);
628 /* XXX implement ATA PASSTHROUGH */
630 /* nothing we understand */
638 /********************************************************************************
639 * Enable the useful interrupts from the controller.
642 twe_enable_interrupts(struct twe_softc *sc)
644 sc->twe_state |= TWE_STATE_INTEN;
646 TWE_CONTROL_CLEAR_ATTENTION_INTERRUPT |
647 TWE_CONTROL_UNMASK_RESPONSE_INTERRUPT |
648 TWE_CONTROL_ENABLE_INTERRUPTS);
651 /********************************************************************************
652 * Disable interrupts from the controller.
655 twe_disable_interrupts(struct twe_softc *sc)
657 TWE_CONTROL(sc, TWE_CONTROL_DISABLE_INTERRUPTS);
658 sc->twe_state &= ~TWE_STATE_INTEN;
661 /********************************************************************************
662 ********************************************************************************
664 ********************************************************************************
665 ********************************************************************************/
667 /********************************************************************************
668 * Read integer parameter table entries.
671 twe_get_param_1(struct twe_softc *sc, int table_id, int param_id, u_int8_t *result)
675 if ((param = twe_get_param(sc, table_id, param_id, 1, NULL)) == NULL)
677 *result = *(u_int8_t *)param->data;
678 free(param, M_DEVBUF);
683 twe_get_param_2(struct twe_softc *sc, int table_id, int param_id, u_int16_t *result)
687 if ((param = twe_get_param(sc, table_id, param_id, 2, NULL)) == NULL)
689 *result = *(u_int16_t *)param->data;
690 free(param, M_DEVBUF);
695 twe_get_param_4(struct twe_softc *sc, int table_id, int param_id, u_int32_t *result)
699 if ((param = twe_get_param(sc, table_id, param_id, 4, NULL)) == NULL)
701 *result = *(u_int32_t *)param->data;
702 free(param, M_DEVBUF);
706 /********************************************************************************
707 * Perform a TWE_OP_GET_PARAM command. If a callback function is provided, it
708 * will be called with the command when it's completed. If no callback is
709 * provided, we will wait for the command to complete and then return just the data.
710 * The caller is responsible for freeing the data when done with it.
713 twe_get_param(struct twe_softc *sc, int table_id, int param_id, size_t param_size,
714 void (* func)(struct twe_request *tr))
716 struct twe_request *tr;
727 if (twe_get_request(sc, &tr))
731 param = (TWE_Param *)malloc(TWE_SECTOR_SIZE, M_DEVBUF, M_INTWAIT);
733 tr->tr_length = TWE_SECTOR_SIZE;
734 tr->tr_flags = TWE_CMD_DATAIN | TWE_CMD_DATAOUT;
736 /* build the command for the controller */
737 cmd = &tr->tr_command;
738 cmd->param.opcode = TWE_OP_GET_PARAM;
741 cmd->param.param_count = 1;
743 /* fill in the outbound parameter data */
744 param->table_id = table_id;
745 param->parameter_id = param_id;
746 param->parameter_size_bytes = param_size;
748 /* submit the command and either wait or let the callback handle it */
750 /* XXX could use twe_wait_request here if interrupts were enabled? */
751 error = twe_immediate_request(tr);
753 if (twe_report_request(tr))
758 twe_release_request(tr);
761 tr->tr_complete = func;
762 error = twe_map_request(tr);
763 if ((error == 0) || (error == EBUSY))
767 /* something failed */
771 twe_release_request(tr);
773 free(param, M_DEVBUF);
777 /********************************************************************************
778 * Set integer parameter table entries.
780 #ifdef TWE_SHUTDOWN_NOTIFICATION
782 twe_set_param_1(struct twe_softc *sc, int table_id, int param_id, u_int8_t value)
784 return(twe_set_param(sc, table_id, param_id, sizeof(value), &value));
790 twe_set_param_2(struct twe_softc *sc, int table_id, int param_id, u_int16_t value)
792 return(twe_set_param(sc, table_id, param_id, sizeof(value), &value));
796 twe_set_param_4(struct twe_softc *sc, int table_id, int param_id, u_int32_t value)
798 return(twe_set_param(sc, table_id, param_id, sizeof(value), &value));
802 /********************************************************************************
803 * Perform a TWE_OP_SET_PARAM command, returns nonzero on error.
806 twe_set_param(struct twe_softc *sc, int table_id, int param_id, int param_size, void *data)
808 struct twe_request *tr;
820 if (twe_get_request(sc, &tr))
824 param = (TWE_Param *)malloc(TWE_SECTOR_SIZE, M_DEVBUF, M_INTWAIT);
826 tr->tr_length = TWE_SECTOR_SIZE;
827 tr->tr_flags = TWE_CMD_DATAIN | TWE_CMD_DATAOUT;
829 /* build the command for the controller */
830 cmd = &tr->tr_command;
831 cmd->param.opcode = TWE_OP_SET_PARAM;
834 cmd->param.param_count = 1;
836 /* fill in the outbound parameter data */
837 param->table_id = table_id;
838 param->parameter_id = param_id;
839 param->parameter_size_bytes = param_size;
840 bcopy(data, param->data, param_size);
842 /* XXX could use twe_wait_request here if interrupts were enabled? */
843 error = twe_immediate_request(tr);
845 if (twe_report_request(tr))
851 twe_release_request(tr);
853 free(param, M_DEVBUF);
857 /********************************************************************************
858 * Perform a TWE_OP_INIT_CONNECTION command, returns nonzero on error.
860 * Typically called with interrupts disabled.
863 twe_init_connection(struct twe_softc *sc, int mode)
865 struct twe_request *tr;
872 if (twe_get_request(sc, &tr))
875 /* build the command */
876 cmd = &tr->tr_command;
877 cmd->initconnection.opcode = TWE_OP_INIT_CONNECTION;
878 cmd->initconnection.size = 3;
879 cmd->initconnection.host_id = 0;
880 cmd->initconnection.message_credits = mode;
881 cmd->initconnection.response_queue_pointer = 0;
883 /* submit the command */
884 error = twe_immediate_request(tr);
885 twe_release_request(tr);
887 if (mode == TWE_INIT_MESSAGE_CREDITS)
888 sc->twe_host_id = cmd->initconnection.host_id;
892 /********************************************************************************
893 * Start the command (tr) and sleep waiting for it to complete.
895 * Successfully completed commands are dequeued.
898 twe_wait_request(struct twe_request *tr)
902 tr->tr_flags |= TWE_CMD_SLEEPER;
903 tr->tr_status = TWE_CMD_BUSY;
904 twe_enqueue_ready(tr);
905 twe_startio(tr->tr_sc);
907 while (tr->tr_status == TWE_CMD_BUSY)
908 tsleep(tr, 0, "twewait", 0);
911 return(tr->tr_status != TWE_CMD_COMPLETE);
914 /********************************************************************************
915 * Start the command (tr) and busy-wait for it to complete.
916 * This should only be used when interrupts are actually disabled (although it
917 * will work if they are not).
920 twe_immediate_request(struct twe_request *tr)
926 tr->tr_status = TWE_CMD_BUSY;
927 if ((error = twe_map_request(tr)) != 0)
930 while (tr->tr_status == TWE_CMD_BUSY){
933 return(tr->tr_status != TWE_CMD_COMPLETE);
936 /********************************************************************************
937 * Handle completion of an I/O command.
940 twe_completeio(struct twe_request *tr)
942 struct twe_softc *sc = tr->tr_sc;
943 twe_bio *bp = (twe_bio *)tr->tr_private;
947 if (tr->tr_status == TWE_CMD_COMPLETE) {
948 if (tr->tr_command.generic.status)
949 if (twe_report_request(tr))
950 TWE_BIO_SET_ERROR(bp, EIO);
952 twe_panic(sc, "twe_completeio on incomplete command");
954 tr->tr_private = NULL;
956 twe_release_request(tr);
959 /********************************************************************************
960 * Reset the controller and pull all the active commands back onto the ready
961 * queue. Used to restart a controller that's exhibiting bad behaviour.
964 twe_reset(struct twe_softc *sc)
966 struct twe_request *tr;
970 * Sleep for a short period to allow AENs to be signalled.
972 tsleep(sc, 0, "twereset", hz);
975 * Disable interrupts from the controller, and mask any accidental entry
976 * into our interrupt handler.
978 twe_printf(sc, "controller reset in progress...\n");
979 twe_disable_interrupts(sc);
983 * Try to soft-reset the controller.
985 for (i = 0; i < TWE_MAX_RESET_TRIES; i++) {
988 twe_printf(sc, "reset %d failed, trying again\n", i);
990 if (!twe_soft_reset(sc))
991 break; /* reset process complete */
993 /* did we give up? */
994 if (i >= TWE_MAX_RESET_TRIES) {
995 twe_printf(sc, "can't reset controller, giving up\n");
1000 * Move all of the commands that were busy back to the ready queue.
1003 while ((tr = twe_dequeue_busy(sc)) != NULL) {
1004 twe_enqueue_ready(tr);
1009 * Kick the controller to start things going again, then re-enable interrupts.
1012 twe_enable_interrupts(sc);
1013 twe_printf(sc, "controller reset done, %d commands restarted\n", i);
1017 twe_enable_interrupts(sc);
1020 /********************************************************************************
1021 ********************************************************************************
1022 Command I/O to Controller
1023 ********************************************************************************
1024 ********************************************************************************/
1026 /********************************************************************************
1027 * Try to deliver (tr) to the controller.
1029 * Can be called at any interrupt level, with or without interrupts enabled.
1032 twe_start(struct twe_request *tr)
1034 struct twe_softc *sc = tr->tr_sc;
1036 u_int32_t status_reg;
1040 /* mark the command as currently being processed */
1041 tr->tr_status = TWE_CMD_BUSY;
1044 * Spin briefly waiting for the controller to come ready
1046 * XXX it might be more efficient to return EBUSY immediately
1047 * and let the command be rescheduled.
1049 for (i = 100000, done = 0; (i > 0) && !done; i--) {
1052 /* check to see if we can post a command */
1053 status_reg = TWE_STATUS(sc);
1054 twe_check_bits(sc, status_reg);
1056 if (!(status_reg & TWE_STATUS_COMMAND_QUEUE_FULL)) {
1057 /* move command to work queue */
1058 twe_enqueue_busy(tr);
1059 TWE_COMMAND_QUEUE(sc, tr->tr_cmdphys);
1062 if (tr->tr_complete != NULL) {
1063 debug(3, "queued request %d with callback %p", tr->tr_command.generic.request_id, tr->tr_complete);
1064 } else if (tr->tr_flags & TWE_CMD_SLEEPER) {
1065 debug(3, "queued request %d with wait channel %p", tr->tr_command.generic.request_id, tr);
1067 debug(3, "queued request %d for polling caller", tr->tr_command.generic.request_id);
1071 crit_exit(); /* drop critical section to allow completion interrupts */
1074 /* command is enqueued */
1079 * We couldn't get the controller to take the command; try submitting it again later.
1080 * This should only happen if something is wrong with the controller, or if we have
1081 * overestimated the number of commands it can accept. (Should we actually reject
1082 * the command at this point?)
1087 /********************************************************************************
1088 * Poll the controller (sc) for completed commands.
1090 * Can be called at any interrupt level, with or without interrupts enabled.
1093 twe_done(struct twe_softc *sc)
1095 TWE_Response_Queue rq;
1096 struct twe_request *tr;
1098 u_int32_t status_reg;
1102 /* loop collecting completed commands */
1106 status_reg = TWE_STATUS(sc);
1107 twe_check_bits(sc, status_reg); /* XXX should this fail? */
1109 if (!(status_reg & TWE_STATUS_RESPONSE_QUEUE_EMPTY)) {
1111 rq = TWE_RESPONSE_QUEUE(sc);
1112 tr = sc->twe_lookup[rq.u.response_id]; /* find command */
1113 if (tr->tr_status != TWE_CMD_BUSY)
1114 twe_printf(sc, "completion event for nonbusy command\n");
1115 tr->tr_status = TWE_CMD_COMPLETE;
1116 debug(3, "completed request id %d with status %d",
1117 tr->tr_command.generic.request_id, tr->tr_command.generic.status);
1118 /* move to completed queue */
1119 twe_remove_busy(tr);
1120 twe_enqueue_complete(tr);
1121 sc->twe_state &= ~TWE_STATE_CTLR_BUSY;
1123 break; /* no response ready */
1128 /* if we've completed any commands, try posting some more */
1132 /* handle completion and timeouts */
1133 twe_complete(sc); /* XXX use deferred completion? */
1136 /********************************************************************************
1137 * Perform post-completion processing for commands on (sc).
1139 * This is split from twe_done as it can be safely deferred and run at a lower
1140 * priority level should facilities for such a thing become available.
1143 twe_complete(struct twe_softc *sc)
1145 struct twe_request *tr;
1150 * Pull commands off the completed list, dispatch them appropriately
1152 while ((tr = twe_dequeue_complete(sc)) != NULL) {
1154 /* unmap the command's data buffer */
1155 twe_unmap_request(tr);
1157 /* dispatch to suit command originator */
1158 if (tr->tr_complete != NULL) { /* completion callback */
1159 debug(2, "call completion handler %p", tr->tr_complete);
1160 tr->tr_complete(tr);
1162 } else if (tr->tr_flags & TWE_CMD_SLEEPER) { /* caller is asleep waiting */
1163 debug(2, "wake up command owner on %p", tr);
1166 } else { /* caller is polling command */
1167 debug(2, "command left for owner");
1172 /********************************************************************************
1173 * Wait for (status) to be set in the controller status register for up to
1174 * (timeout) seconds. Returns 0 if found, nonzero if we time out.
1176 * Note: this busy-waits, rather than sleeping, since we may be called with
1177 * eg. clock interrupts masked.
1180 twe_wait_status(struct twe_softc *sc, u_int32_t status, int timeout)
1183 u_int32_t status_reg;
1187 expiry = time_second + timeout;
1190 status_reg = TWE_STATUS(sc);
1191 if (status_reg & status) /* got the required bit(s)? */
1194 } while (time_second <= expiry);
1199 /********************************************************************************
1200 * Drain the response queue, which may contain responses to commands we know
1204 twe_drain_response_queue(struct twe_softc *sc)
1206 TWE_Response_Queue rq;
1207 u_int32_t status_reg;
1211 for (;;) { /* XXX give up eventually? */
1212 status_reg = TWE_STATUS(sc);
1213 if (twe_check_bits(sc, status_reg))
1215 if (status_reg & TWE_STATUS_RESPONSE_QUEUE_EMPTY)
1217 rq = TWE_RESPONSE_QUEUE(sc);
1221 /********************************************************************************
1222 * Soft-reset the controller
1225 twe_soft_reset(struct twe_softc *sc)
1227 u_int32_t status_reg;
1233 if (twe_wait_status(sc, TWE_STATUS_ATTENTION_INTERRUPT, 30)) {
1234 twe_printf(sc, "no attention interrupt\n");
1237 TWE_CONTROL(sc, TWE_CONTROL_CLEAR_ATTENTION_INTERRUPT);
1238 if (twe_drain_aen_queue(sc)) {
1239 twe_printf(sc, "can't drain AEN queue\n");
1242 if (twe_find_aen(sc, TWE_AEN_SOFT_RESET)) {
1243 twe_printf(sc, "reset not reported\n");
1246 status_reg = TWE_STATUS(sc);
1247 if (TWE_STATUS_ERRORS(status_reg) || twe_check_bits(sc, status_reg)) {
1248 twe_printf(sc, "controller errors detected\n");
1251 if (twe_drain_response_queue(sc)) {
1252 twe_printf(sc, "can't drain response queue\n");
1258 /********************************************************************************
1259 ********************************************************************************
1261 ********************************************************************************
1262 ********************************************************************************/
1264 /********************************************************************************
1267 * XXX what does this mean?
1270 twe_host_intr(struct twe_softc *sc)
1274 twe_printf(sc, "host interrupt\n");
1275 TWE_CONTROL(sc, TWE_CONTROL_CLEAR_HOST_INTERRUPT);
1278 /********************************************************************************
1279 * Attention interrupt.
1281 * Signalled when the controller has one or more AENs for us.
1284 twe_attention_intr(struct twe_softc *sc)
1288 /* instigate a poll for AENs */
1289 if (twe_fetch_aen(sc)) {
1290 twe_printf(sc, "error polling for signalled AEN\n");
1292 TWE_CONTROL(sc, TWE_CONTROL_CLEAR_ATTENTION_INTERRUPT);
1296 /********************************************************************************
1297 * Command interrupt.
1299 * Signalled when the controller can handle more commands.
1302 twe_command_intr(struct twe_softc *sc)
1307 * We don't use this, rather we try to submit commands when we receive
1308 * them, and when other commands have completed. Mask it so we don't get
1310 twe_printf(sc, "command interrupt\n");
1312 TWE_CONTROL(sc, TWE_CONTROL_MASK_COMMAND_INTERRUPT);
1315 /********************************************************************************
1316 ********************************************************************************
1317 Asynchronous Event Handling
1318 ********************************************************************************
1319 ********************************************************************************/
1321 /********************************************************************************
1322 * Request an AEN from the controller.
1325 twe_fetch_aen(struct twe_softc *sc)
1330 if ((twe_get_param(sc, TWE_PARAM_AEN, TWE_PARAM_AEN_UnitCode, 2, twe_handle_aen)) == NULL)
1335 /********************************************************************************
1336 * Handle an AEN returned by the controller.
1339 twe_handle_aen(struct twe_request *tr)
1341 struct twe_softc *sc = tr->tr_sc;
1347 /* XXX check for command success somehow? */
1349 param = (TWE_Param *)tr->tr_data;
1350 aen = *(u_int16_t *)(param->data);
1352 free(tr->tr_data, M_DEVBUF);
1353 twe_release_request(tr);
1354 twe_enqueue_aen(sc, aen);
1356 /* XXX poll for more AENs? */
1359 /********************************************************************************
1360 * Pull AENs out of the controller and park them in the queue, in a context where
1361 * interrupts aren't active. Return nonzero if we encounter any errors in the
1362 * process of obtaining all the available AENs.
1365 twe_drain_aen_queue(struct twe_softc *sc)
1370 if (twe_get_param_2(sc, TWE_PARAM_AEN, TWE_PARAM_AEN_UnitCode, &aen))
1372 if (aen == TWE_AEN_QUEUE_EMPTY)
1374 twe_enqueue_aen(sc, aen);
1378 /********************************************************************************
1379 * Push an AEN that we've received onto the queue.
1381 * Note that we have to lock this against reentrance, since it may be called
1382 * from both interrupt and non-interrupt context.
1384 * If someone is waiting for the AEN we have, wake them up.
1387 twe_enqueue_aen(struct twe_softc *sc, u_int16_t aen)
1394 if ((msg = twe_format_aen(sc, aen)) != NULL)
1395 twe_printf(sc, "AEN: <%s>\n", msg);
1398 /* enqueue the AEN */
1399 next = ((sc->twe_aen_head + 1) % TWE_Q_LENGTH);
1400 nextnext = ((sc->twe_aen_head + 2) % TWE_Q_LENGTH);
1402 /* check to see if this is the last free slot, and subvert the AEN if it is */
1403 if (nextnext == sc->twe_aen_tail)
1404 aen = TWE_AEN_QUEUE_FULL;
1406 /* look to see if there's room for this AEN */
1407 if (next != sc->twe_aen_tail) {
1408 sc->twe_aen_queue[sc->twe_aen_head] = aen;
1409 sc->twe_aen_head = next;
1412 /* wake up anyone asleep on the queue */
1413 wakeup(&sc->twe_aen_queue);
1415 /* anyone looking for this AEN? */
1416 if (sc->twe_wait_aen == aen) {
1417 sc->twe_wait_aen = -1;
1418 wakeup(&sc->twe_wait_aen);
1423 /********************************************************************************
1424 * Pop an AEN off the queue, or return -1 if there are none left.
1426 * We are more or less interrupt-safe, so don't block interrupts.
1429 twe_dequeue_aen(struct twe_softc *sc)
1435 if (sc->twe_aen_tail == sc->twe_aen_head) {
1436 result = TWE_AEN_QUEUE_EMPTY;
1438 result = sc->twe_aen_queue[sc->twe_aen_tail];
1439 sc->twe_aen_tail = ((sc->twe_aen_tail + 1) % TWE_Q_LENGTH);
1444 /********************************************************************************
1445 * Check to see if the requested AEN is in the queue.
1447 * XXX we could probably avoid masking interrupts here
1450 twe_find_aen(struct twe_softc *sc, u_int16_t aen)
1456 for (i = sc->twe_aen_tail; (i != sc->twe_aen_head) && missing; i = (i + 1) % TWE_Q_LENGTH) {
1457 if (sc->twe_aen_queue[i] == aen)
1465 #if 0 /* currently unused */
1466 /********************************************************************************
1467 * Sleep waiting for at least (timeout) seconds until we see (aen) as
1468 * requested. Returns nonzero on timeout or failure.
1470 * XXX: this should not be used in cases where there may be more than one sleeper
1471 * without a mechanism for registering multiple sleepers.
1474 twe_wait_aen(struct twe_softc *sc, int aen, int timeout)
1481 expiry = time_second + timeout;
1485 sc->twe_wait_aen = aen;
1488 tsleep(&sc->twe_wait_aen, PZERO, "twewaen", hz);
1489 if (sc->twe_wait_aen == -1)
1491 } while ((time_second <= expiry) && !found);
1497 /********************************************************************************
1498 ********************************************************************************
1499 Command Buffer Management
1500 ********************************************************************************
1501 ********************************************************************************/
1503 /********************************************************************************
1504 * Get a new command buffer.
1506 * This will return NULL if all command buffers are in use.
1509 twe_get_request(struct twe_softc *sc, struct twe_request **tr)
1513 /* try to reuse an old buffer */
1514 *tr = twe_dequeue_free(sc);
1516 /* initialise some fields to their defaults */
1518 (*tr)->tr_data = NULL;
1519 (*tr)->tr_private = NULL;
1520 (*tr)->tr_status = TWE_CMD_SETUP; /* command is in setup phase */
1521 (*tr)->tr_flags = 0;
1522 (*tr)->tr_complete = NULL;
1523 (*tr)->tr_command.generic.status = 0; /* before submission to controller */
1524 (*tr)->tr_command.generic.flags = 0; /* not used */
1526 return(*tr == NULL);
1529 /********************************************************************************
1530 * Release a command buffer for reuse.
1534 twe_release_request(struct twe_request *tr)
1538 if (tr->tr_private != NULL)
1539 twe_panic(tr->tr_sc, "tr_private != NULL");
1540 twe_enqueue_free(tr);
1543 /********************************************************************************
1544 ********************************************************************************
1546 ********************************************************************************
1547 ********************************************************************************/
1549 /********************************************************************************
1550 * Print some information about the controller
1553 twe_describe_controller(struct twe_softc *sc)
1562 /* get the port count */
1563 twe_get_param_1(sc, TWE_PARAM_CONTROLLER, TWE_PARAM_CONTROLLER_PortCount, &ports);
1565 /* get version strings */
1566 p[0] = twe_get_param(sc, TWE_PARAM_VERSION, TWE_PARAM_VERSION_FW, 16, NULL);
1567 p[1] = twe_get_param(sc, TWE_PARAM_VERSION, TWE_PARAM_VERSION_BIOS, 16, NULL);
1570 twe_printf(sc, "%d ports, Firmware %.16s, BIOS %.16s\n", ports, p[0]->data, p[1]->data);
1572 p[2] = twe_get_param(sc, TWE_PARAM_VERSION, TWE_PARAM_VERSION_Mon, 16, NULL);
1573 p[3] = twe_get_param(sc, TWE_PARAM_VERSION, TWE_PARAM_VERSION_PCB, 8, NULL);
1574 p[4] = twe_get_param(sc, TWE_PARAM_VERSION, TWE_PARAM_VERSION_ATA, 8, NULL);
1575 p[5] = twe_get_param(sc, TWE_PARAM_VERSION, TWE_PARAM_VERSION_PCI, 8, NULL);
1577 if (p[2] && p[3] && p[4] && p[5])
1578 twe_printf(sc, "Monitor %.16s, PCB %.8s, Achip %.8s, Pchip %.8s\n",
1579 p[2]->data, p[3]->data, p[4]->data, p[5]->data);
1582 free(p[2], M_DEVBUF);
1584 free(p[3], M_DEVBUF);
1586 free(p[4], M_DEVBUF);
1588 free(p[5], M_DEVBUF);
1591 free(p[0], M_DEVBUF);
1593 free(p[1], M_DEVBUF);
1595 /* print attached drives */
1597 p[0] = twe_get_param(sc, TWE_PARAM_DRIVESUMMARY, TWE_PARAM_DRIVESUMMARY_Status, 16, NULL);
1598 for (i = 0; i < ports; i++) {
1599 if (p[0]->data[i] != TWE_PARAM_DRIVESTATUS_Present)
1601 twe_get_param_4(sc, TWE_PARAM_DRIVEINFO + i, TWE_PARAM_DRIVEINFO_Size, &size);
1602 p[1] = twe_get_param(sc, TWE_PARAM_DRIVEINFO + i, TWE_PARAM_DRIVEINFO_Model, 40, NULL);
1604 twe_printf(sc, "port %d: %.40s %dMB\n", i, p[1]->data, size / 2048);
1605 free(p[1], M_DEVBUF);
1607 twe_printf(sc, "port %d, drive status unavailable\n", i);
1611 free(p[0], M_DEVBUF);
1616 /********************************************************************************
1617 * Look up a text description of a numeric code and return a pointer to same.
1620 twe_describe_code(struct twe_code_lookup *table, u_int32_t code)
1624 for (i = 0; table[i].string != NULL; i++)
1625 if (table[i].code == code)
1626 return(table[i].string);
1627 return(table[i+1].string);
1631 /********************************************************************************
1632 * Complain if the status bits aren't what we're expecting.
1634 * Rate-limit the complaints to at most one of each every five seconds, but
1635 * always return the correct status.
1638 twe_check_bits(struct twe_softc *sc, u_int32_t status_reg)
1641 static time_t lastwarn[2] = {0, 0};
1644 * This can be a little problematic, as twe_panic may call twe_reset if
1645 * TWE_DEBUG is not set, which will call us again as part of the soft reset.
1647 if ((status_reg & TWE_STATUS_PANIC_BITS) != 0) {
1648 twe_printf(sc, "FATAL STATUS BIT(S) %b\n", status_reg & TWE_STATUS_PANIC_BITS,
1649 TWE_STATUS_BITS_DESCRIPTION);
1650 twe_panic(sc, "fatal status bits");
1654 if ((status_reg & TWE_STATUS_EXPECTED_BITS) != TWE_STATUS_EXPECTED_BITS) {
1655 if (time_second > (lastwarn[0] + 5)) {
1656 twe_printf(sc, "missing expected status bit(s) %b\n", ~status_reg & TWE_STATUS_EXPECTED_BITS,
1657 TWE_STATUS_BITS_DESCRIPTION);
1658 lastwarn[0] = time_second;
1663 if ((status_reg & TWE_STATUS_UNEXPECTED_BITS) != 0) {
1664 if (time_second > (lastwarn[1] + 5)) {
1665 twe_printf(sc, "unexpected status bit(s) %b\n", status_reg & TWE_STATUS_UNEXPECTED_BITS,
1666 TWE_STATUS_BITS_DESCRIPTION);
1667 lastwarn[1] = time_second;
1670 if (status_reg & TWE_STATUS_PCI_PARITY_ERROR) {
1671 twe_printf(sc, "PCI parity error: Reseat card, move card or buggy device present.");
1672 twe_clear_pci_parity_error(sc);
1674 if (status_reg & TWE_STATUS_PCI_ABORT) {
1675 twe_printf(sc, "PCI abort, clearing.");
1676 twe_clear_pci_abort(sc);
1683 /********************************************************************************
1684 * Return a string describing (aen).
1686 * The low 8 bits of the aen are the code, the high 8 bits give the unit number
1687 * where an AEN is specific to a unit.
1689 * Note that we could expand this routine to handle eg. up/downgrading the status
1690 * of a drive if we had some idea of what the drive's initial status was.
1694 twe_format_aen(struct twe_softc *sc, u_int16_t aen)
1696 static char buf[80];
1700 code = twe_describe_code(twe_table_aen, TWE_AEN_CODE(aen));
1712 if ((child = sc->twe_drive[TWE_AEN_UNIT(aen)].td_disk) != NULL) {
1713 sprintf(buf, "twed%d: %s", device_get_unit(child), msg);
1715 sprintf(buf, "twe%d: %s for unknown unit %d", device_get_unit(sc->twe_dev),
1716 msg, TWE_AEN_UNIT(aen));
1721 sprintf(buf, "twe%d: port %d: %s", device_get_unit(sc->twe_dev), TWE_AEN_UNIT(aen),
1730 sprintf(buf, "unknown AEN 0x%x", aen);
1734 /********************************************************************************
1735 * Print a diagnostic if the status of the command warrants it, and return
1736 * either zero (command was ok) or nonzero (command failed).
1739 twe_report_request(struct twe_request *tr)
1741 struct twe_softc *sc = tr->tr_sc;
1742 TWE_Command *cmd = &tr->tr_command;
1746 * Check the command status value and handle accordingly.
1748 if (cmd->generic.status == TWE_STATUS_RESET) {
1750 * The status code 0xff requests a controller reset.
1752 twe_printf(sc, "command returned with controller reset request\n");
1755 } else if (cmd->generic.status > TWE_STATUS_FATAL) {
1757 * Fatal errors that don't require controller reset.
1759 * We know a few special flags values.
1761 switch (cmd->generic.flags) {
1763 device_printf(sc->twe_drive[cmd->generic.unit].td_disk,
1767 device_printf(sc->twe_drive[cmd->generic.unit].td_disk,
1768 "unrecoverable drive error");
1771 device_printf(sc->twe_drive[cmd->generic.unit].td_disk,
1772 "controller error - %s (flags = 0x%x)\n",
1773 twe_describe_code(twe_table_status, cmd->generic.status),
1774 cmd->generic.flags);
1777 } else if (cmd->generic.status > TWE_STATUS_WARNING) {
1779 * Warning level status.
1781 device_printf(sc->twe_drive[cmd->generic.unit].td_disk,
1782 "warning - %s (flags = 0x%x)\n",
1783 twe_describe_code(twe_table_status, cmd->generic.status),
1784 cmd->generic.flags);
1785 } else if (cmd->generic.status > 0x40) {
1787 * Info level status.
1789 device_printf(sc->twe_drive[cmd->generic.unit].td_disk,
1790 "attention - %s (flags = 0x%x)\n",
1791 twe_describe_code(twe_table_status, cmd->generic.status),
1792 cmd->generic.flags);
1798 /********************************************************************************
1799 * Print some controller state to aid in debugging error/panic conditions
1802 twe_print_controller(struct twe_softc *sc)
1804 u_int32_t status_reg;
1806 status_reg = TWE_STATUS(sc);
1807 twe_printf(sc, "status %b\n", status_reg, TWE_STATUS_BITS_DESCRIPTION);
1808 twe_printf(sc, " current max min\n");
1809 twe_printf(sc, "free %04d %04d %04d\n", sc->twe_qstat[TWEQ_FREE].q_length, sc->twe_qstat[TWEQ_FREE].q_max, sc->twe_qstat[TWEQ_FREE].q_min);
1810 twe_printf(sc, "ready %04d %04d %04d\n", sc->twe_qstat[TWEQ_READY].q_length, sc->twe_qstat[TWEQ_READY].q_max, sc->twe_qstat[TWEQ_READY].q_min);
1811 twe_printf(sc, "busy %04d %04d %04d\n", sc->twe_qstat[TWEQ_BUSY].q_length, sc->twe_qstat[TWEQ_BUSY].q_max, sc->twe_qstat[TWEQ_BUSY].q_min);
1812 twe_printf(sc, "complete %04d %04d %04d\n", sc->twe_qstat[TWEQ_COMPLETE].q_length, sc->twe_qstat[TWEQ_COMPLETE].q_max, sc->twe_qstat[TWEQ_COMPLETE].q_min);
1813 twe_printf(sc, "bioq %04d %04d %04d\n", sc->twe_qstat[TWEQ_BIO].q_length, sc->twe_qstat[TWEQ_BIO].q_max, sc->twe_qstat[TWEQ_BIO].q_min);
1814 twe_printf(sc, "AEN queue head %d tail %d\n", sc->twe_aen_head, sc->twe_aen_tail);
1818 twe_panic(struct twe_softc *sc, char *reason)
1820 twe_print_controller(sc);
1829 /********************************************************************************
1830 * Print a request/command in human-readable format.
1833 twe_print_request(struct twe_request *tr)
1835 struct twe_softc *sc = tr->tr_sc;
1836 TWE_Command *cmd = &tr->tr_command;
1839 twe_printf(sc, "CMD: request_id %d opcode <%s> size %d unit %d host_id %d\n",
1840 cmd->generic.request_id, twe_describe_code(twe_table_opcode, cmd->generic.opcode), cmd->generic.size,
1841 cmd->generic.unit, cmd->generic.host_id);
1842 twe_printf(sc, " status %d flags 0x%x count %d sgl_offset %d\n",
1843 cmd->generic.status, cmd->generic.flags, cmd->generic.count, cmd->generic.sgl_offset);
1845 switch(cmd->generic.opcode) { /* XXX add more opcodes? */
1848 twe_printf(sc, " lba %d\n", cmd->io.lba);
1849 for (i = 0; (i < TWE_MAX_SGL_LENGTH) && (cmd->io.sgl[i].length != 0); i++)
1850 twe_printf(sc, " %d: 0x%x/%d\n",
1851 i, cmd->io.sgl[i].address, cmd->io.sgl[i].length);
1854 case TWE_OP_GET_PARAM:
1855 case TWE_OP_SET_PARAM:
1856 for (i = 0; (i < TWE_MAX_SGL_LENGTH) && (cmd->param.sgl[i].length != 0); i++)
1857 twe_printf(sc, " %d: 0x%x/%d\n",
1858 i, cmd->param.sgl[i].address, cmd->param.sgl[i].length);
1861 case TWE_OP_INIT_CONNECTION:
1862 twe_printf(sc, " response queue pointer 0x%x\n",
1863 cmd->initconnection.response_queue_pointer);
1869 twe_printf(sc, " tr_command %p/0x%x tr_data %p/0x%x,%d\n",
1870 tr, tr->tr_cmdphys, tr->tr_data, tr->tr_dataphys, tr->tr_length);
1871 twe_printf(sc, " tr_status %d tr_flags 0x%x tr_complete %p tr_private %p\n",
1872 tr->tr_status, tr->tr_flags, tr->tr_complete, tr->tr_private);