2 * Copyright (c) 2000 Michael Smith
3 * Copyright (c) 2000 BSDi
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
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.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * $FreeBSD: src/sys/dev/twe/twe.c,v 1.1.2.6 2002/03/07 09:57:02 msmith Exp $
28 * $DragonFly: src/sys/dev/raid/twe/twe.c,v 1.9 2004/06/25 18:09:56 hmp Exp $
32 * Driver for the 3ware Escalade family of IDE RAID controllers.
35 #include "twe_compat.h"
39 #define TWE_DEFINE_TABLES
40 #include "twe_tables.h"
45 static int twe_get_param_1(struct twe_softc *sc, int table_id, int param_id, u_int8_t *result);
46 static int twe_get_param_2(struct twe_softc *sc, int table_id, int param_id, u_int16_t *result);
47 static int twe_get_param_4(struct twe_softc *sc, int table_id, int param_id, u_int32_t *result);
48 static void *twe_get_param(struct twe_softc *sc, int table_id, int parameter_id, size_t size,
49 void (* func)(struct twe_request *tr));
50 #ifdef TWE_SHUTDOWN_NOTIFICATION
51 static int twe_set_param_1(struct twe_softc *sc, int table_id, int param_id, u_int8_t value);
54 static int twe_set_param_2(struct twe_softc *sc, int table_id, int param_id, u_int16_t value);
55 static int twe_set_param_4(struct twe_softc *sc, int table_id, int param_id, u_int32_t value);
57 static int twe_set_param(struct twe_softc *sc, int table_id, int param_id, int param_size,
59 static int twe_init_connection(struct twe_softc *sc, int mode);
60 static int twe_wait_request(struct twe_request *tr);
61 static int twe_immediate_request(struct twe_request *tr);
62 static void twe_completeio(struct twe_request *tr);
63 static void twe_reset(struct twe_softc *sc);
64 static void twe_add_unit(struct twe_softc *sc, int unit);
65 static void twe_del_unit(struct twe_softc *sc, int unit);
68 * Command I/O to controller.
70 static int twe_start(struct twe_request *tr);
71 static void twe_done(struct twe_softc *sc);
72 static void twe_complete(struct twe_softc *sc);
73 static int twe_wait_status(struct twe_softc *sc, u_int32_t status, int timeout);
74 static int twe_drain_response_queue(struct twe_softc *sc);
75 static int twe_check_bits(struct twe_softc *sc, u_int32_t status_reg);
76 static int twe_soft_reset(struct twe_softc *sc);
81 static void twe_host_intr(struct twe_softc *sc);
82 static void twe_attention_intr(struct twe_softc *sc);
83 static void twe_command_intr(struct twe_softc *sc);
86 * Asynchronous event handling.
88 static int twe_fetch_aen(struct twe_softc *sc);
89 static void twe_handle_aen(struct twe_request *tr);
90 static void twe_enqueue_aen(struct twe_softc *sc, u_int16_t aen);
91 static int twe_dequeue_aen(struct twe_softc *sc);
92 static int twe_drain_aen_queue(struct twe_softc *sc);
93 static int twe_find_aen(struct twe_softc *sc, u_int16_t aen);
96 * Command buffer management.
98 static int twe_get_request(struct twe_softc *sc, struct twe_request **tr);
99 static void twe_release_request(struct twe_request *tr);
104 static char *twe_format_aen(struct twe_softc *sc, u_int16_t aen);
105 static int twe_report_request(struct twe_request *tr);
106 static void twe_panic(struct twe_softc *sc, char *reason);
108 /********************************************************************************
109 ********************************************************************************
111 ********************************************************************************
112 ********************************************************************************/
114 /********************************************************************************
115 * Initialise the controller, set up driver data structures.
118 twe_setup(struct twe_softc *sc)
120 struct twe_request *tr;
121 u_int32_t status_reg;
127 * Initialise request queues.
133 twe_initq_complete(sc);
134 sc->twe_wait_aen = -1;
137 * Allocate request structures up front.
139 for (i = 0; i < TWE_Q_LENGTH; i++) {
140 if ((tr = twe_allocate_request(sc)) == NULL)
143 * Set global defaults that won't change.
145 tr->tr_command.generic.host_id = sc->twe_host_id; /* controller-assigned host ID */
146 tr->tr_command.generic.request_id = i; /* our index number */
147 sc->twe_lookup[i] = tr;
150 * Put command onto the freelist.
152 twe_release_request(tr);
156 * Check status register for errors, clear them.
158 status_reg = TWE_STATUS(sc);
159 twe_check_bits(sc, status_reg);
162 * Wait for the controller to come ready.
164 if (twe_wait_status(sc, TWE_STATUS_MICROCONTROLLER_READY, 60)) {
165 twe_printf(sc, "microcontroller not ready\n");
170 * Disable interrupts from the card.
172 twe_disable_interrupts(sc);
175 * Soft reset the controller, look for the AEN acknowledging the reset,
176 * check for errors, drain the response queue.
178 for (i = 0; i < TWE_MAX_RESET_TRIES; i++) {
181 twe_printf(sc, "reset %d failed, trying again\n", i);
183 if (!twe_soft_reset(sc))
184 break; /* reset process complete */
186 /* did we give up? */
187 if (i >= TWE_MAX_RESET_TRIES) {
188 twe_printf(sc, "can't initialise controller, giving up\n");
196 twe_add_unit(struct twe_softc *sc, int unit)
198 struct twe_drive *dr;
201 TWE_Param *drives = NULL, *param = NULL;
202 TWE_Unit_Descriptor *ud;
204 if (unit < 0 || unit > TWE_MAX_UNITS)
208 * The controller is in a safe state, so try to find drives attached to it.
210 if ((drives = twe_get_param(sc, TWE_PARAM_UNITSUMMARY, TWE_PARAM_UNITSUMMARY_Status,
211 TWE_MAX_UNITS, NULL)) == NULL) {
212 twe_printf(sc, "can't detect attached units\n");
216 dr = &sc->twe_drive[unit];
217 /* check that the drive is online */
218 if (!(drives->data[unit] & TWE_PARAM_UNITSTATUS_Online))
221 table = TWE_PARAM_UNITINFO + unit;
223 if (twe_get_param_4(sc, table, TWE_PARAM_UNITINFO_Capacity, &dr->td_size)) {
224 twe_printf(sc, "error fetching capacity for unit %d\n", unit);
227 if (twe_get_param_1(sc, table, TWE_PARAM_UNITINFO_Status, &dr->td_state)) {
228 twe_printf(sc, "error fetching state for unit %d\n", unit);
231 if (twe_get_param_2(sc, table, TWE_PARAM_UNITINFO_DescriptorSize, &dsize)) {
232 twe_printf(sc, "error fetching descriptor size for unit %d\n", unit);
235 if ((param = twe_get_param(sc, table, TWE_PARAM_UNITINFO_Descriptor, dsize - 3, NULL)) == NULL) {
236 twe_printf(sc, "error fetching descriptor for unit %d\n", unit);
239 ud = (TWE_Unit_Descriptor *)param->data;
240 dr->td_type = ud->configuration;
242 /* build synthetic geometry as per controller internal rules */
243 if (dr->td_size > 0x200000) {
250 dr->td_cylinders = dr->td_size / (dr->td_heads * dr->td_sectors);
253 twe_attach_drive(sc, dr);
257 free(param, M_DEVBUF);
259 free(drives, M_DEVBUF);
263 twe_del_unit(struct twe_softc *sc, int unit)
266 if (unit < 0 || unit >= TWE_MAX_UNITS)
269 twe_detach_drive(sc, unit);
272 /********************************************************************************
273 * Locate disk devices and attach children to them.
276 twe_init(struct twe_softc *sc)
283 for (i = 0; i < TWE_MAX_UNITS; i++)
287 * Initialise connection with controller.
289 twe_init_connection(sc, TWE_INIT_MESSAGE_CREDITS);
291 #ifdef TWE_SHUTDOWN_NOTIFICATION
293 * Tell the controller we support shutdown notification.
295 twe_set_param_1(sc, TWE_PARAM_FEATURES, TWE_PARAM_FEATURES_DriverShutdown, 1);
299 * Mark controller up and ready to run.
301 sc->twe_state &= ~TWE_STATE_SHUTDOWN;
304 * Finally enable interrupts.
306 twe_enable_interrupts(sc);
309 /********************************************************************************
310 * Stop the controller
313 twe_deinit(struct twe_softc *sc)
316 * Mark the controller as shutting down, and disable any further interrupts.
318 sc->twe_state |= TWE_STATE_SHUTDOWN;
319 twe_disable_interrupts(sc);
321 #ifdef TWE_SHUTDOWN_NOTIFICATION
323 * Disconnect from the controller
325 twe_init_connection(sc, TWE_SHUTDOWN_MESSAGE_CREDITS);
329 /*******************************************************************************
330 * Take an interrupt, or be poked by other code to look for interrupt-worthy
334 twe_intr(struct twe_softc *sc)
336 u_int32_t status_reg;
341 * Collect current interrupt status.
343 status_reg = TWE_STATUS(sc);
344 twe_check_bits(sc, status_reg);
347 * Dispatch based on interrupt status
349 if (status_reg & TWE_STATUS_HOST_INTERRUPT)
351 if (status_reg & TWE_STATUS_ATTENTION_INTERRUPT)
352 twe_attention_intr(sc);
353 if (status_reg & TWE_STATUS_COMMAND_INTERRUPT)
354 twe_command_intr(sc);
355 if (status_reg & TWE_STATUS_RESPONSE_INTERRUPT)
359 /********************************************************************************
360 * Pull as much work off the softc's work queue as possible and give it to the
364 twe_startio(struct twe_softc *sc)
366 struct twe_request *tr;
373 /* spin until something prevents us from doing any work */
376 /* try to get a command that's already ready to go */
377 tr = twe_dequeue_ready(sc);
379 /* build a command from an outstanding bio */
382 /* get a command to handle the bio with */
383 if (twe_get_request(sc, &tr))
386 /* see if there's work to be done */
387 if ((bp = twe_dequeue_bio(sc)) == NULL) {
388 twe_release_request(tr);
392 /* connect the bio to the command */
393 tr->tr_complete = twe_completeio;
395 tr->tr_data = TWE_BIO_DATA(bp);
396 tr->tr_length = TWE_BIO_LENGTH(bp);
397 cmd = &tr->tr_command;
398 if (TWE_BIO_IS_READ(bp)) {
399 tr->tr_flags |= TWE_CMD_DATAIN;
400 cmd->io.opcode = TWE_OP_READ;
402 tr->tr_flags |= TWE_CMD_DATAOUT;
403 cmd->io.opcode = TWE_OP_WRITE;
406 /* build a suitable I/O command (assumes 512-byte rounded transfers) */
408 cmd->io.unit = TWE_BIO_UNIT(bp);
409 cmd->io.block_count = (tr->tr_length + TWE_BLOCK_SIZE - 1) / TWE_BLOCK_SIZE;
410 cmd->io.lba = TWE_BIO_LBA(bp);
412 /* map the command so the controller can work with it */
416 /* did we find something to do? */
420 /* try to give command to controller */
421 error = twe_start(tr);
424 if (error == EBUSY) {
425 twe_requeue_ready(tr); /* try it again later */
426 break; /* don't try anything more for now */
428 /* we don't support any other return from twe_start */
429 twe_panic(sc, "twe_start returned nonsense");
434 /********************************************************************************
435 * Write blocks from memory to disk, for system crash dumps.
438 twe_dump_blocks(struct twe_softc *sc, int unit, u_int32_t lba, void *data, int nblks)
440 struct twe_request *tr;
444 if (twe_get_request(sc, &tr))
448 tr->tr_status = TWE_CMD_SETUP;
449 tr->tr_length = nblks * TWE_BLOCK_SIZE;
450 tr->tr_flags = TWE_CMD_DATAOUT;
452 cmd = &tr->tr_command;
453 cmd->io.opcode = TWE_OP_WRITE;
456 cmd->io.block_count = nblks;
460 error = twe_immediate_request(tr);
462 if (twe_report_request(tr))
464 twe_release_request(tr);
468 /********************************************************************************
469 * Handle controller-specific control operations.
472 twe_ioctl(struct twe_softc *sc, int cmd, void *addr)
474 struct twe_usercommand *tu = (struct twe_usercommand *)addr;
475 struct twe_paramcommand *tp = (struct twe_paramcommand *)addr;
476 struct twe_drivecommand *td = (struct twe_drivecommand *)addr;
477 union twe_statrequest *ts = (union twe_statrequest *)addr;
480 int *arg = (int *)addr;
481 struct twe_request *tr;
487 /* handle a command from userspace */
490 while (twe_get_request(sc, &tr))
491 tsleep(sc, PPAUSE, "twioctl", hz);
494 * Save the command's request ID, copy the user-supplied command in,
495 * restore the request ID.
497 srid = tr->tr_command.generic.request_id;
498 bcopy(&tu->tu_command, &tr->tr_command, sizeof(TWE_Command));
499 tr->tr_command.generic.request_id = srid;
502 * if there's a data buffer, allocate and copy it in.
503 * Must be in multipled of 512 bytes.
505 tr->tr_length = (tu->tu_size + 511) & ~511;
506 if (tr->tr_length > 0) {
507 if ((tr->tr_data = malloc(tr->tr_length, M_DEVBUF, M_WAITOK)) == NULL) {
511 if ((error = copyin(tu->tu_data, tr->tr_data, tu->tu_size)) != 0)
513 tr->tr_flags |= TWE_CMD_DATAIN | TWE_CMD_DATAOUT;
516 /* run the command */
518 twe_wait_request(tr);
520 /* copy the command out again */
521 bcopy(&tr->tr_command, &tu->tu_command, sizeof(TWE_Command));
523 /* if there was a data buffer, copy it out */
524 if (tr->tr_length > 0)
525 error = copyout(tr->tr_data, tu->tu_data, tu->tu_size);
529 if (tr->tr_data != NULL)
530 free(tr->tr_data, M_DEVBUF);
532 twe_release_request(tr);
536 /* fetch statistics counter */
538 switch (ts->ts_item) {
539 #ifdef TWE_PERFORMANCE_MONITOR
545 bcopy(&sc->twe_qstat[ts->ts_item], &ts->ts_qstat, sizeof(struct twe_qstat));
554 /* poll for an AEN */
556 *arg = twe_dequeue_aen(sc);
559 /* wait for another AEN to show up */
562 while ((*arg = twe_dequeue_aen(sc)) == TWE_AEN_QUEUE_EMPTY) {
563 error = tsleep(&sc->twe_aen_queue, 0 | PCATCH, "tweaen", 0);
570 case TWEIO_GET_PARAM:
571 if ((param = twe_get_param(sc, tp->tp_table_id, tp->tp_param_id, tp->tp_size, NULL)) == NULL) {
572 twe_printf(sc, "TWEIO_GET_PARAM failed for 0x%x/0x%x/%d\n",
573 tp->tp_table_id, tp->tp_param_id, tp->tp_size);
576 if (param->parameter_size_bytes > tp->tp_size) {
577 twe_printf(sc, "TWEIO_GET_PARAM parameter too large (%d > %d)\n",
578 param->parameter_size_bytes, tp->tp_size);
581 error = copyout(param->data, tp->tp_data, param->parameter_size_bytes);
583 free(param, M_DEVBUF);
587 case TWEIO_SET_PARAM:
588 if ((data = malloc(tp->tp_size, M_DEVBUF, M_WAITOK)) == NULL) {
591 error = copyin(tp->tp_data, data, tp->tp_size);
593 error = twe_set_param(sc, tp->tp_table_id, tp->tp_param_id, tp->tp_size, data);
594 free(data, M_DEVBUF);
603 twe_add_unit(sc, td->td_unit);
607 twe_del_unit(sc, td->td_unit);
610 /* XXX implement ATA PASSTHROUGH */
612 /* nothing we understand */
620 /********************************************************************************
621 * Enable the useful interrupts from the controller.
624 twe_enable_interrupts(struct twe_softc *sc)
626 sc->twe_state |= TWE_STATE_INTEN;
628 TWE_CONTROL_CLEAR_ATTENTION_INTERRUPT |
629 TWE_CONTROL_UNMASK_RESPONSE_INTERRUPT |
630 TWE_CONTROL_ENABLE_INTERRUPTS);
633 /********************************************************************************
634 * Disable interrupts from the controller.
637 twe_disable_interrupts(struct twe_softc *sc)
639 TWE_CONTROL(sc, TWE_CONTROL_DISABLE_INTERRUPTS);
640 sc->twe_state &= ~TWE_STATE_INTEN;
643 /********************************************************************************
644 ********************************************************************************
646 ********************************************************************************
647 ********************************************************************************/
649 /********************************************************************************
650 * Read integer parameter table entries.
653 twe_get_param_1(struct twe_softc *sc, int table_id, int param_id, u_int8_t *result)
657 if ((param = twe_get_param(sc, table_id, param_id, 1, NULL)) == NULL)
659 *result = *(u_int8_t *)param->data;
660 free(param, M_DEVBUF);
665 twe_get_param_2(struct twe_softc *sc, int table_id, int param_id, u_int16_t *result)
669 if ((param = twe_get_param(sc, table_id, param_id, 2, NULL)) == NULL)
671 *result = *(u_int16_t *)param->data;
672 free(param, M_DEVBUF);
677 twe_get_param_4(struct twe_softc *sc, int table_id, int param_id, u_int32_t *result)
681 if ((param = twe_get_param(sc, table_id, param_id, 4, NULL)) == NULL)
683 *result = *(u_int32_t *)param->data;
684 free(param, M_DEVBUF);
688 /********************************************************************************
689 * Perform a TWE_OP_GET_PARAM command. If a callback function is provided, it
690 * will be called with the command when it's completed. If no callback is
691 * provided, we will wait for the command to complete and then return just the data.
692 * The caller is responsible for freeing the data when done with it.
695 twe_get_param(struct twe_softc *sc, int table_id, int param_id, size_t param_size,
696 void (* func)(struct twe_request *tr))
698 struct twe_request *tr;
709 if (twe_get_request(sc, &tr))
713 param = malloc(TWE_SECTOR_SIZE, M_DEVBUF, M_INTWAIT);
715 tr->tr_length = TWE_SECTOR_SIZE;
716 tr->tr_flags = TWE_CMD_DATAIN | TWE_CMD_DATAOUT;
718 /* build the command for the controller */
719 cmd = &tr->tr_command;
720 cmd->param.opcode = TWE_OP_GET_PARAM;
723 cmd->param.param_count = 1;
725 /* map the command/data into controller-visible space */
728 /* fill in the outbound parameter data */
729 param->table_id = table_id;
730 param->parameter_id = param_id;
731 param->parameter_size_bytes = param_size;
733 /* submit the command and either wait or let the callback handle it */
735 /* XXX could use twe_wait_request here if interrupts were enabled? */
736 error = twe_immediate_request(tr);
738 if (twe_report_request(tr))
741 twe_release_request(tr);
744 tr->tr_complete = func;
745 error = twe_start(tr);
750 /* something failed */
754 twe_release_request(tr);
756 free(param, M_DEVBUF);
760 /********************************************************************************
761 * Set integer parameter table entries.
763 #ifdef TWE_SHUTDOWN_NOTIFICATION
765 twe_set_param_1(struct twe_softc *sc, int table_id, int param_id, u_int8_t value)
767 return(twe_set_param(sc, table_id, param_id, sizeof(value), &value));
773 twe_set_param_2(struct twe_softc *sc, int table_id, int param_id, u_int16_t value)
775 return(twe_set_param(sc, table_id, param_id, sizeof(value), &value));
779 twe_set_param_4(struct twe_softc *sc, int table_id, int param_id, u_int32_t value)
781 return(twe_set_param(sc, table_id, param_id, sizeof(value), &value));
785 /********************************************************************************
786 * Perform a TWE_OP_SET_PARAM command, returns nonzero on error.
789 twe_set_param(struct twe_softc *sc, int table_id, int param_id, int param_size, void *data)
791 struct twe_request *tr;
803 if (twe_get_request(sc, &tr))
807 param = malloc(TWE_SECTOR_SIZE, M_DEVBUF, M_INTWAIT);
809 tr->tr_length = TWE_SECTOR_SIZE;
810 tr->tr_flags = TWE_CMD_DATAIN | TWE_CMD_DATAOUT;
812 /* build the command for the controller */
813 cmd = &tr->tr_command;
814 cmd->param.opcode = TWE_OP_SET_PARAM;
817 cmd->param.param_count = 1;
819 /* map the command/data into controller-visible space */
822 /* fill in the outbound parameter data */
823 param->table_id = table_id;
824 param->parameter_id = param_id;
825 param->parameter_size_bytes = param_size;
826 bcopy(data, param->data, param_size);
828 /* XXX could use twe_wait_request here if interrupts were enabled? */
829 error = twe_immediate_request(tr);
831 if (twe_report_request(tr))
837 twe_release_request(tr);
839 free(param, M_DEVBUF);
843 /********************************************************************************
844 * Perform a TWE_OP_INIT_CONNECTION command, returns nonzero on error.
846 * Typically called with interrupts disabled.
849 twe_init_connection(struct twe_softc *sc, int mode)
851 struct twe_request *tr;
858 if (twe_get_request(sc, &tr))
861 /* build the command */
862 cmd = &tr->tr_command;
863 cmd->initconnection.opcode = TWE_OP_INIT_CONNECTION;
864 cmd->initconnection.size = 3;
865 cmd->initconnection.host_id = 0;
866 cmd->initconnection.message_credits = mode;
867 cmd->initconnection.response_queue_pointer = 0;
869 /* map the command into controller-visible space */
872 /* submit the command */
873 error = twe_immediate_request(tr);
874 /* XXX check command result? */
875 twe_unmap_request(tr);
876 twe_release_request(tr);
878 if (mode == TWE_INIT_MESSAGE_CREDITS)
879 sc->twe_host_id = cmd->initconnection.host_id;
883 /********************************************************************************
884 * Start the command (tr) and sleep waiting for it to complete.
886 * Successfully completed commands are dequeued.
889 twe_wait_request(struct twe_request *tr)
895 tr->tr_flags |= TWE_CMD_SLEEPER;
896 tr->tr_status = TWE_CMD_BUSY;
897 twe_enqueue_ready(tr);
898 twe_startio(tr->tr_sc);
900 while (tr->tr_status == TWE_CMD_BUSY)
901 tsleep(tr, 0, "twewait", 0);
907 /********************************************************************************
908 * Start the command (tr) and busy-wait for it to complete.
909 * This should only be used when interrupts are actually disabled (although it
910 * will work if they are not).
913 twe_immediate_request(struct twe_request *tr)
921 if ((error = twe_start(tr)) != 0)
923 while (tr->tr_status == TWE_CMD_BUSY){
926 return(tr->tr_status != TWE_CMD_COMPLETE);
929 /********************************************************************************
930 * Handle completion of an I/O command.
933 twe_completeio(struct twe_request *tr)
935 struct twe_softc *sc = tr->tr_sc;
936 twe_bio *bp = (twe_bio *)tr->tr_private;
940 if (tr->tr_status == TWE_CMD_COMPLETE) {
942 if (twe_report_request(tr))
943 TWE_BIO_SET_ERROR(bp, EIO);
946 twe_panic(sc, "twe_completeio on incomplete command");
948 tr->tr_private = NULL;
950 twe_release_request(tr);
953 /********************************************************************************
954 * Reset the controller and pull all the active commands back onto the ready
955 * queue. Used to restart a controller that's exhibiting bad behaviour.
958 twe_reset(struct twe_softc *sc)
960 struct twe_request *tr;
964 * Sleep for a short period to allow AENs to be signalled.
966 tsleep(sc, 0, "twereset", hz);
969 * Disable interrupts from the controller, and mask any accidental entry
970 * into our interrupt handler.
972 twe_printf(sc, "controller reset in progress...\n");
973 twe_disable_interrupts(sc);
977 * Try to soft-reset the controller.
979 for (i = 0; i < TWE_MAX_RESET_TRIES; i++) {
982 twe_printf(sc, "reset %d failed, trying again\n", i);
984 if (!twe_soft_reset(sc))
985 break; /* reset process complete */
987 /* did we give up? */
988 if (i >= TWE_MAX_RESET_TRIES) {
989 twe_printf(sc, "can't reset controller, giving up\n");
994 * Move all of the commands that were busy back to the ready queue.
997 while ((tr = twe_dequeue_busy(sc)) != NULL) {
998 twe_enqueue_ready(tr);
1003 * Kick the controller to start things going again, then re-enable interrupts.
1006 twe_enable_interrupts(sc);
1007 twe_printf(sc, "controller reset done, %d commands restarted\n", i);
1011 twe_enable_interrupts(sc);
1014 /********************************************************************************
1015 ********************************************************************************
1016 Command I/O to Controller
1017 ********************************************************************************
1018 ********************************************************************************/
1020 /********************************************************************************
1021 * Try to deliver (tr) to the controller.
1023 * Can be called at any interrupt level, with or without interrupts enabled.
1026 twe_start(struct twe_request *tr)
1028 struct twe_softc *sc = tr->tr_sc;
1030 u_int32_t status_reg;
1034 /* mark the command as currently being processed */
1035 tr->tr_status = TWE_CMD_BUSY;
1038 * Spin briefly waiting for the controller to come ready
1040 * XXX it might be more efficient to return EBUSY immediately
1041 * and let the command be rescheduled.
1043 for (i = 100000, done = 0; (i > 0) && !done; i--) {
1046 /* check to see if we can post a command */
1047 status_reg = TWE_STATUS(sc);
1048 twe_check_bits(sc, status_reg);
1050 if (!(status_reg & TWE_STATUS_COMMAND_QUEUE_FULL)) {
1051 /* move command to work queue */
1052 twe_enqueue_busy(tr);
1053 TWE_COMMAND_QUEUE(sc, tr->tr_cmdphys);
1056 if (tr->tr_complete != NULL) {
1057 debug(3, "queued request %d with callback %p", tr->tr_command.generic.request_id, tr->tr_complete);
1058 } else if (tr->tr_flags & TWE_CMD_SLEEPER) {
1059 debug(3, "queued request %d with wait channel %p", tr->tr_command.generic.request_id, tr);
1061 debug(3, "queued request %d for polling caller", tr->tr_command.generic.request_id);
1065 splx(s); /* drop spl to allow completion interrupts */
1068 /* command is enqueued */
1073 * We couldn't get the controller to take the command; try submitting it again later.
1074 * This should only happen if something is wrong with the controller, or if we have
1075 * overestimated the number of commands it can accept. (Should we actually reject
1076 * the command at this point?)
1081 /********************************************************************************
1082 * Poll the controller (sc) for completed commands.
1084 * Can be called at any interrupt level, with or without interrupts enabled.
1087 twe_done(struct twe_softc *sc)
1089 TWE_Response_Queue rq;
1090 struct twe_request *tr;
1092 u_int32_t status_reg;
1096 /* loop collecting completed commands */
1100 status_reg = TWE_STATUS(sc);
1101 twe_check_bits(sc, status_reg); /* XXX should this fail? */
1103 if (!(status_reg & TWE_STATUS_RESPONSE_QUEUE_EMPTY)) {
1105 rq = TWE_RESPONSE_QUEUE(sc);
1106 tr = sc->twe_lookup[rq.u.response_id]; /* find command */
1107 if (tr->tr_status != TWE_CMD_BUSY)
1108 twe_printf(sc, "completion event for nonbusy command\n");
1109 tr->tr_status = TWE_CMD_COMPLETE;
1110 debug(3, "completed request id %d with status %d",
1111 tr->tr_command.generic.request_id, tr->tr_command.generic.status);
1112 /* move to completed queue */
1113 twe_remove_busy(tr);
1114 twe_enqueue_complete(tr);
1116 break; /* no response ready */
1121 /* if we've completed any commands, try posting some more */
1125 /* handle completion and timeouts */
1126 twe_complete(sc); /* XXX use deferred completion? */
1129 /********************************************************************************
1130 * Perform post-completion processing for commands on (sc).
1132 * This is split from twe_done as it can be safely deferred and run at a lower
1133 * priority level should facilities for such a thing become available.
1136 twe_complete(struct twe_softc *sc)
1138 struct twe_request *tr;
1143 * Pull commands off the completed list, dispatch them appropriately
1145 while ((tr = twe_dequeue_complete(sc)) != NULL) {
1147 /* unmap the command's data buffer */
1148 twe_unmap_request(tr);
1150 /* dispatch to suit command originator */
1151 if (tr->tr_complete != NULL) { /* completion callback */
1152 debug(2, "call completion handler %p", tr->tr_complete);
1153 tr->tr_complete(tr);
1155 } else if (tr->tr_flags & TWE_CMD_SLEEPER) { /* caller is asleep waiting */
1156 debug(2, "wake up command owner on %p", tr);
1159 } else { /* caller is polling command */
1160 debug(2, "command left for owner");
1165 /********************************************************************************
1166 * Wait for (status) to be set in the controller status register for up to
1167 * (timeout) seconds. Returns 0 if found, nonzero if we time out.
1169 * Note: this busy-waits, rather than sleeping, since we may be called with
1170 * eg. clock interrupts masked.
1173 twe_wait_status(struct twe_softc *sc, u_int32_t status, int timeout)
1176 u_int32_t status_reg;
1180 expiry = time_second + timeout;
1183 status_reg = TWE_STATUS(sc);
1184 if (status_reg & status) /* got the required bit(s)? */
1187 } while (time_second <= expiry);
1192 /********************************************************************************
1193 * Drain the response queue, which may contain responses to commands we know
1197 twe_drain_response_queue(struct twe_softc *sc)
1199 TWE_Response_Queue rq;
1200 u_int32_t status_reg;
1204 for (;;) { /* XXX give up eventually? */
1205 status_reg = TWE_STATUS(sc);
1206 if (twe_check_bits(sc, status_reg))
1208 if (status_reg & TWE_STATUS_RESPONSE_QUEUE_EMPTY)
1210 rq = TWE_RESPONSE_QUEUE(sc);
1214 /********************************************************************************
1215 * Soft-reset the controller
1218 twe_soft_reset(struct twe_softc *sc)
1220 u_int32_t status_reg;
1226 if (twe_wait_status(sc, TWE_STATUS_ATTENTION_INTERRUPT, 30)) {
1227 twe_printf(sc, "no attention interrupt\n");
1230 TWE_CONTROL(sc, TWE_CONTROL_CLEAR_ATTENTION_INTERRUPT);
1231 if (twe_drain_aen_queue(sc)) {
1232 twe_printf(sc, "can't drain AEN queue\n");
1235 if (twe_find_aen(sc, TWE_AEN_SOFT_RESET)) {
1236 twe_printf(sc, "reset not reported\n");
1239 status_reg = TWE_STATUS(sc);
1240 if (TWE_STATUS_ERRORS(status_reg) || twe_check_bits(sc, status_reg)) {
1241 twe_printf(sc, "controller errors detected\n");
1244 if (twe_drain_response_queue(sc)) {
1245 twe_printf(sc, "can't drain response queue\n");
1251 /********************************************************************************
1252 ********************************************************************************
1254 ********************************************************************************
1255 ********************************************************************************/
1257 /********************************************************************************
1260 * XXX what does this mean?
1263 twe_host_intr(struct twe_softc *sc)
1267 twe_printf(sc, "host interrupt\n");
1268 TWE_CONTROL(sc, TWE_CONTROL_CLEAR_HOST_INTERRUPT);
1271 /********************************************************************************
1272 * Attention interrupt.
1274 * Signalled when the controller has one or more AENs for us.
1277 twe_attention_intr(struct twe_softc *sc)
1281 /* instigate a poll for AENs */
1282 if (twe_fetch_aen(sc)) {
1283 twe_printf(sc, "error polling for signalled AEN\n");
1285 TWE_CONTROL(sc, TWE_CONTROL_CLEAR_ATTENTION_INTERRUPT);
1289 /********************************************************************************
1290 * Command interrupt.
1292 * Signalled when the controller can handle more commands.
1295 twe_command_intr(struct twe_softc *sc)
1300 * We don't use this, rather we try to submit commands when we receive
1301 * them, and when other commands have completed. Mask it so we don't get
1304 twe_printf(sc, "command interrupt\n");
1305 TWE_CONTROL(sc, TWE_CONTROL_MASK_COMMAND_INTERRUPT);
1308 /********************************************************************************
1309 ********************************************************************************
1310 Asynchronous Event Handling
1311 ********************************************************************************
1312 ********************************************************************************/
1314 /********************************************************************************
1315 * Request an AEN from the controller.
1318 twe_fetch_aen(struct twe_softc *sc)
1323 if ((twe_get_param(sc, TWE_PARAM_AEN, TWE_PARAM_AEN_UnitCode, 2, twe_handle_aen)) == NULL)
1328 /********************************************************************************
1329 * Handle an AEN returned by the controller.
1332 twe_handle_aen(struct twe_request *tr)
1334 struct twe_softc *sc = tr->tr_sc;
1340 /* XXX check for command success somehow? */
1342 param = (TWE_Param *)tr->tr_data;
1343 aen = *(u_int16_t *)(param->data);
1345 free(tr->tr_data, M_DEVBUF);
1346 twe_release_request(tr);
1347 twe_enqueue_aen(sc, aen);
1349 /* XXX poll for more AENs? */
1352 /********************************************************************************
1353 * Pull AENs out of the controller and park them in the queue, in a context where
1354 * interrupts aren't active. Return nonzero if we encounter any errors in the
1355 * process of obtaining all the available AENs.
1358 twe_drain_aen_queue(struct twe_softc *sc)
1363 if (twe_get_param_2(sc, TWE_PARAM_AEN, TWE_PARAM_AEN_UnitCode, &aen))
1365 if (aen == TWE_AEN_QUEUE_EMPTY)
1367 twe_enqueue_aen(sc, aen);
1371 /********************************************************************************
1372 * Push an AEN that we've received onto the queue.
1374 * Note that we have to lock this against reentrance, since it may be called
1375 * from both interrupt and non-interrupt context.
1377 * If someone is waiting for the AEN we have, wake them up.
1380 twe_enqueue_aen(struct twe_softc *sc, u_int16_t aen)
1383 int s, next, nextnext;
1387 if ((msg = twe_format_aen(sc, aen)) != NULL)
1388 twe_printf(sc, "AEN: <%s>\n", msg);
1391 /* enqueue the AEN */
1392 next = ((sc->twe_aen_head + 1) % TWE_Q_LENGTH);
1393 nextnext = ((sc->twe_aen_head + 2) % TWE_Q_LENGTH);
1395 /* check to see if this is the last free slot, and subvert the AEN if it is */
1396 if (nextnext == sc->twe_aen_tail)
1397 aen = TWE_AEN_QUEUE_FULL;
1399 /* look to see if there's room for this AEN */
1400 if (next != sc->twe_aen_tail) {
1401 sc->twe_aen_queue[sc->twe_aen_head] = aen;
1402 sc->twe_aen_head = next;
1405 /* wake up anyone asleep on the queue */
1406 wakeup(&sc->twe_aen_queue);
1408 /* anyone looking for this AEN? */
1409 if (sc->twe_wait_aen == aen) {
1410 sc->twe_wait_aen = -1;
1411 wakeup(&sc->twe_wait_aen);
1416 /********************************************************************************
1417 * Pop an AEN off the queue, or return -1 if there are none left.
1419 * We are more or less interrupt-safe, so don't block interrupts.
1422 twe_dequeue_aen(struct twe_softc *sc)
1428 if (sc->twe_aen_tail == sc->twe_aen_head) {
1429 result = TWE_AEN_QUEUE_EMPTY;
1431 result = sc->twe_aen_queue[sc->twe_aen_tail];
1432 sc->twe_aen_tail = ((sc->twe_aen_tail + 1) % TWE_Q_LENGTH);
1437 /********************************************************************************
1438 * Check to see if the requested AEN is in the queue.
1440 * XXX we could probably avoid masking interrupts here
1443 twe_find_aen(struct twe_softc *sc, u_int16_t aen)
1449 for (i = sc->twe_aen_tail; (i != sc->twe_aen_head) && missing; i = (i + 1) % TWE_Q_LENGTH) {
1450 if (sc->twe_aen_queue[i] == aen)
1458 #if 0 /* currently unused */
1459 /********************************************************************************
1460 * Sleep waiting for at least (timeout) seconds until we see (aen) as
1461 * requested. Returns nonzero on timeout or failure.
1463 * XXX: this should not be used in cases where there may be more than one sleeper
1464 * without a mechanism for registering multiple sleepers.
1467 twe_wait_aen(struct twe_softc *sc, int aen, int timeout)
1474 expiry = time_second + timeout;
1478 sc->twe_wait_aen = aen;
1481 tsleep(&sc->twe_wait_aen, PZERO, "twewaen", hz);
1482 if (sc->twe_wait_aen == -1)
1484 } while ((time_second <= expiry) && !found);
1490 /********************************************************************************
1491 ********************************************************************************
1492 Command Buffer Management
1493 ********************************************************************************
1494 ********************************************************************************/
1496 /********************************************************************************
1497 * Get a new command buffer.
1499 * This will return NULL if all command buffers are in use.
1502 twe_get_request(struct twe_softc *sc, struct twe_request **tr)
1506 /* try to reuse an old buffer */
1507 *tr = twe_dequeue_free(sc);
1509 /* initialise some fields to their defaults */
1511 (*tr)->tr_data = NULL;
1512 (*tr)->tr_private = NULL;
1513 (*tr)->tr_status = TWE_CMD_SETUP; /* command is in setup phase */
1514 (*tr)->tr_flags = 0;
1515 (*tr)->tr_complete = NULL;
1516 (*tr)->tr_command.generic.status = 0; /* before submission to controller */
1517 (*tr)->tr_command.generic.flags = 0; /* not used */
1519 return(*tr == NULL);
1522 /********************************************************************************
1523 * Release a command buffer for reuse.
1527 twe_release_request(struct twe_request *tr)
1531 if (tr->tr_private != NULL)
1532 twe_panic(tr->tr_sc, "tr_private != NULL");
1533 twe_enqueue_free(tr);
1536 /********************************************************************************
1537 ********************************************************************************
1539 ********************************************************************************
1540 ********************************************************************************/
1542 /********************************************************************************
1543 * Print some information about the controller
1546 twe_describe_controller(struct twe_softc *sc)
1555 /* get the port count */
1556 twe_get_param_1(sc, TWE_PARAM_CONTROLLER, TWE_PARAM_CONTROLLER_PortCount, &ports);
1558 /* get version strings */
1559 p[0] = twe_get_param(sc, TWE_PARAM_VERSION, TWE_PARAM_VERSION_Mon, 16, NULL);
1560 p[1] = twe_get_param(sc, TWE_PARAM_VERSION, TWE_PARAM_VERSION_FW, 16, NULL);
1561 p[2] = twe_get_param(sc, TWE_PARAM_VERSION, TWE_PARAM_VERSION_BIOS, 16, NULL);
1562 p[3] = twe_get_param(sc, TWE_PARAM_VERSION, TWE_PARAM_VERSION_PCB, 8, NULL);
1563 p[4] = twe_get_param(sc, TWE_PARAM_VERSION, TWE_PARAM_VERSION_ATA, 8, NULL);
1564 p[5] = twe_get_param(sc, TWE_PARAM_VERSION, TWE_PARAM_VERSION_PCI, 8, NULL);
1566 twe_printf(sc, "%d ports, Firmware %.16s, BIOS %.16s\n", ports, p[1]->data, p[2]->data);
1568 twe_printf(sc, "Monitor %.16s, PCB %.8s, Achip %.8s, Pchip %.8s\n", p[0]->data, p[3]->data,
1569 p[4]->data, p[5]->data);
1570 free(p[0], M_DEVBUF);
1571 free(p[1], M_DEVBUF);
1572 free(p[2], M_DEVBUF);
1573 free(p[3], M_DEVBUF);
1574 free(p[4], M_DEVBUF);
1575 free(p[5], M_DEVBUF);
1577 /* print attached drives */
1579 p[0] = twe_get_param(sc, TWE_PARAM_DRIVESUMMARY, TWE_PARAM_DRIVESUMMARY_Status, 16, NULL);
1580 for (i = 0; i < ports; i++) {
1581 if (p[0]->data[i] != TWE_PARAM_DRIVESTATUS_Present)
1583 twe_get_param_4(sc, TWE_PARAM_DRIVEINFO + i, TWE_PARAM_DRIVEINFO_Size, &size);
1584 p[1] = twe_get_param(sc, TWE_PARAM_DRIVEINFO + i, TWE_PARAM_DRIVEINFO_Model, 40, NULL);
1586 twe_printf(sc, "port %d: %.40s %dMB\n", i, p[1]->data, size / 2048);
1587 free(p[1], M_DEVBUF);
1589 twe_printf(sc, "port %d, drive status unavailable\n", i);
1592 free(p[0], M_DEVBUF);
1596 /********************************************************************************
1597 * Complain if the status bits aren't what we're expecting.
1599 * Rate-limit the complaints to at most one of each every five seconds, but
1600 * always return the correct status.
1603 twe_check_bits(struct twe_softc *sc, u_int32_t status_reg)
1606 static time_t lastwarn[2] = {0, 0};
1609 * This can be a little problematic, as twe_panic may call twe_reset if
1610 * TWE_DEBUG is not set, which will call us again as part of the soft reset.
1612 if ((status_reg & TWE_STATUS_PANIC_BITS) != 0) {
1613 twe_printf(sc, "FATAL STATUS BIT(S) %b\n", status_reg & TWE_STATUS_PANIC_BITS,
1614 TWE_STATUS_BITS_DESCRIPTION);
1615 twe_panic(sc, "fatal status bits");
1619 if ((status_reg & TWE_STATUS_EXPECTED_BITS) != TWE_STATUS_EXPECTED_BITS) {
1620 if (time_second > (lastwarn[0] + 5)) {
1621 twe_printf(sc, "missing expected status bit(s) %b\n", ~status_reg & TWE_STATUS_EXPECTED_BITS,
1622 TWE_STATUS_BITS_DESCRIPTION);
1623 lastwarn[0] = time_second;
1628 if ((status_reg & TWE_STATUS_UNEXPECTED_BITS) != 0) {
1629 if (time_second > (lastwarn[1] + 5)) {
1630 twe_printf(sc, "unexpected status bit(s) %b\n", status_reg & TWE_STATUS_UNEXPECTED_BITS,
1631 TWE_STATUS_BITS_DESCRIPTION);
1632 lastwarn[1] = time_second;
1635 if (status_reg & TWE_STATUS_PCI_PARITY_ERROR) {
1636 twe_printf(sc, "PCI parity error: Reseat card, move card or buggy device present.");
1637 twe_clear_pci_parity_error(sc);
1639 if (status_reg & TWE_STATUS_PCI_ABORT) {
1640 twe_printf(sc, "PCI abort, clearing.");
1641 twe_clear_pci_abort(sc);
1648 /********************************************************************************
1649 * Return a string describing (aen).
1651 * The low 8 bits of the aen are the code, the high 8 bits give the unit number
1652 * where an AEN is specific to a unit.
1654 * Note that we could expand this routine to handle eg. up/downgrading the status
1655 * of a drive if we had some idea of what the drive's initial status was.
1659 twe_format_aen(struct twe_softc *sc, u_int16_t aen)
1661 static char buf[80];
1665 code = twe_describe_code(twe_table_aen, TWE_AEN_CODE(aen));
1677 if ((child = sc->twe_drive[TWE_AEN_UNIT(aen)].td_disk) != NULL) {
1678 sprintf(buf, "twed%d: %s", device_get_unit(child), msg);
1680 sprintf(buf, "twe%d: %s for unknown unit %d", device_get_unit(sc->twe_dev),
1681 msg, TWE_AEN_UNIT(aen));
1686 sprintf(buf, "twe%d: port %d: %s", device_get_unit(sc->twe_dev), TWE_AEN_UNIT(aen),
1695 sprintf(buf, "unknown AEN 0x%x", aen);
1699 /********************************************************************************
1700 * Print a diagnostic if the status of the command warrants it, and return
1701 * either zero (command was ok) or nonzero (command failed).
1704 twe_report_request(struct twe_request *tr)
1706 struct twe_softc *sc = tr->tr_sc;
1707 TWE_Command *cmd = &tr->tr_command;
1711 * Check the command status value and handle accordingly.
1713 if (cmd->generic.status == TWE_STATUS_RESET) {
1715 * The status code 0xff requests a controller reset.
1717 twe_printf(sc, "command returned with controller rest request\n");
1720 } else if (cmd->generic.status > TWE_STATUS_FATAL) {
1722 * Fatal errors that don't require controller reset.
1724 * We know a few special flags values.
1726 switch (cmd->generic.flags) {
1728 device_printf(sc->twe_drive[cmd->generic.unit].td_disk,
1732 device_printf(sc->twe_drive[cmd->generic.unit].td_disk,
1733 "unrecoverable drive error");
1736 device_printf(sc->twe_drive[cmd->generic.unit].td_disk,
1737 "controller error - %s (flags = 0x%x)\n",
1738 twe_describe_code(twe_table_status, cmd->generic.status),
1739 cmd->generic.flags);
1742 } else if (cmd->generic.status > TWE_STATUS_WARNING) {
1744 * Warning level status.
1746 device_printf(sc->twe_drive[cmd->generic.unit].td_disk,
1747 "warning - %s (flags = 0x%x)\n",
1748 twe_describe_code(twe_table_status, cmd->generic.status),
1749 cmd->generic.flags);
1750 } else if (cmd->generic.status > 0x40) {
1752 * Info level status.
1754 device_printf(sc->twe_drive[cmd->generic.unit].td_disk,
1755 "attention - %s (flags = 0x%x)\n",
1756 twe_describe_code(twe_table_status, cmd->generic.status),
1757 cmd->generic.flags);
1763 /********************************************************************************
1764 * Print some controller state to aid in debugging error/panic conditions
1767 twe_print_controller(struct twe_softc *sc)
1769 u_int32_t status_reg;
1771 status_reg = TWE_STATUS(sc);
1772 twe_printf(sc, "status %b\n", status_reg, TWE_STATUS_BITS_DESCRIPTION);
1773 twe_printf(sc, " current max\n");
1774 twe_printf(sc, "free %04d %04d\n", sc->twe_qstat[TWEQ_FREE].q_length, sc->twe_qstat[TWEQ_FREE].q_max);
1775 twe_printf(sc, "ready %04d %04d\n", sc->twe_qstat[TWEQ_READY].q_length, sc->twe_qstat[TWEQ_READY].q_max);
1776 twe_printf(sc, "busy %04d %04d\n", sc->twe_qstat[TWEQ_BUSY].q_length, sc->twe_qstat[TWEQ_BUSY].q_max);
1777 twe_printf(sc, "complete %04d %04d\n", sc->twe_qstat[TWEQ_COMPLETE].q_length, sc->twe_qstat[TWEQ_COMPLETE].q_max);
1778 twe_printf(sc, "bioq %04d %04d\n", sc->twe_qstat[TWEQ_BIO].q_length, sc->twe_qstat[TWEQ_BIO].q_max);
1779 twe_printf(sc, "AEN queue head %d tail %d\n", sc->twe_aen_head, sc->twe_aen_tail);
1783 twe_panic(struct twe_softc *sc, char *reason)
1785 twe_print_controller(sc);
1794 /********************************************************************************
1795 * Print a request/command in human-readable format.
1798 twe_print_request(struct twe_request *tr)
1800 struct twe_softc *sc = tr->tr_sc;
1801 TWE_Command *cmd = &tr->tr_command;
1804 twe_printf(sc, "CMD: request_id %d opcode <%s> size %d unit %d host_id %d\n",
1805 cmd->generic.request_id, twe_describe_code(twe_table_opcode, cmd->generic.opcode), cmd->generic.size,
1806 cmd->generic.unit, cmd->generic.host_id);
1807 twe_printf(sc, " status %d flags 0x%x count %d sgl_offset %d\n",
1808 cmd->generic.status, cmd->generic.flags, cmd->generic.count, cmd->generic.sgl_offset);
1810 switch(cmd->generic.opcode) { /* XXX add more opcodes? */
1813 twe_printf(sc, " lba %d\n", cmd->io.lba);
1814 for (i = 0; (i < TWE_MAX_SGL_LENGTH) && (cmd->io.sgl[i].length != 0); i++)
1815 twe_printf(sc, " %d: 0x%x/%d\n",
1816 i, cmd->io.sgl[i].address, cmd->io.sgl[i].length);
1819 case TWE_OP_GET_PARAM:
1820 case TWE_OP_SET_PARAM:
1821 for (i = 0; (i < TWE_MAX_SGL_LENGTH) && (cmd->param.sgl[i].length != 0); i++)
1822 twe_printf(sc, " %d: 0x%x/%d\n",
1823 i, cmd->param.sgl[i].address, cmd->param.sgl[i].length);
1826 case TWE_OP_INIT_CONNECTION:
1827 twe_printf(sc, " response queue pointer 0x%x\n",
1828 cmd->initconnection.response_queue_pointer);
1834 twe_printf(sc, " tr_command %p/0x%x tr_data %p/0x%x,%d\n",
1835 tr, tr->tr_cmdphys, tr->tr_data, tr->tr_dataphys, tr->tr_length);
1836 twe_printf(sc, " tr_status %d tr_flags 0x%x tr_complete %p tr_private %p\n",
1837 tr->tr_status, tr->tr_flags, tr->tr_complete, tr->tr_private);