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 1.16 2006/09/05 00:55:42 dillon 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 kfree(param, M_DEVBUF);
266 kfree(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 ((bio = twe_dequeue_bio(sc)) == NULL) {
404 twe_release_request(tr);
408 /* connect the bio to the command */
409 tr->tr_complete = twe_completeio;
410 tr->tr_private = bio;
411 tr->tr_data = bio->bio_buf->b_data;
412 tr->tr_length = bio->bio_buf->b_bcount;
413 cmd = &tr->tr_command;
414 if (bio->bio_buf->b_cmd == BUF_CMD_READ) {
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 = ((struct twed_softc *)bio->bio_driver_info)->twed_drive->td_twe_unit;
425 cmd->io.block_count = (tr->tr_length + TWE_BLOCK_SIZE - 1) / TWE_BLOCK_SIZE;
426 cmd->io.lba = (u_int32_t)(bio->bio_offset / TWE_BLOCK_SIZE);
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 bio = (twe_bio *)tr->tr_private;
442 bio->bio_buf->b_error = error;
443 bio->bio_buf->b_flags |= B_ERROR;
444 tr->tr_private = NULL;
446 twe_release_request(tr);
447 } else if (tr->tr_flags & TWE_CMD_SLEEPER)
448 wakeup_one(tr); /* wakeup the sleeping owner */
453 /********************************************************************************
454 * Write blocks from memory to disk, for system crash dumps.
457 twe_dump_blocks(struct twe_softc *sc, int unit, u_int32_t lba, void *data, int nblks)
459 struct twe_request *tr;
463 if (twe_get_request(sc, &tr))
467 tr->tr_status = TWE_CMD_SETUP;
468 tr->tr_length = nblks * TWE_BLOCK_SIZE;
469 tr->tr_flags = TWE_CMD_DATAOUT;
471 cmd = &tr->tr_command;
472 cmd->io.opcode = TWE_OP_WRITE;
475 cmd->io.block_count = nblks;
478 error = twe_immediate_request(tr);
480 if (twe_report_request(tr))
482 twe_release_request(tr);
486 /********************************************************************************
487 * Handle controller-specific control operations.
490 twe_ioctl(struct twe_softc *sc, int cmd, void *addr)
492 struct twe_usercommand *tu = (struct twe_usercommand *)addr;
493 struct twe_paramcommand *tp = (struct twe_paramcommand *)addr;
494 struct twe_drivecommand *td = (struct twe_drivecommand *)addr;
495 union twe_statrequest *ts = (union twe_statrequest *)addr;
498 unsigned short *aen_code = (unsigned short *) addr;
499 struct twe_request *tr;
505 /* handle a command from userspace */
508 while (twe_get_request(sc, &tr))
509 tsleep(sc, 0, "twioctl", hz);
512 * Save the command's request ID, copy the user-supplied command in,
513 * restore the request ID.
515 srid = tr->tr_command.generic.request_id;
516 bcopy(&tu->tu_command, &tr->tr_command, sizeof(TWE_Command));
517 tr->tr_command.generic.request_id = srid;
520 * if there's a data buffer, allocate and copy it in.
521 * Must be in multipled of 512 bytes.
523 tr->tr_length = (tu->tu_size + 511) & ~511;
524 if (tr->tr_length > 0) {
525 if ((tr->tr_data = kmalloc(tr->tr_length, M_DEVBUF, M_WAITOK)) == NULL) {
529 if ((error = copyin(tu->tu_data, tr->tr_data, tu->tu_size)) != 0)
531 tr->tr_flags |= TWE_CMD_DATAIN | TWE_CMD_DATAOUT;
534 /* run the command */
535 error = twe_wait_request(tr);
539 /* copy the command out again */
540 bcopy(&tr->tr_command, &tu->tu_command, sizeof(TWE_Command));
542 /* if there was a data buffer, copy it out */
543 if (tr->tr_length > 0)
544 error = copyout(tr->tr_data, tu->tu_data, tu->tu_size);
548 if (tr->tr_data != NULL)
549 kfree(tr->tr_data, M_DEVBUF);
551 twe_release_request(tr);
555 /* fetch statistics counter */
557 switch (ts->ts_item) {
558 #ifdef TWE_PERFORMANCE_MONITOR
564 bcopy(&sc->twe_qstat[ts->ts_item], &ts->ts_qstat, sizeof(struct twe_qstat));
573 /* poll for an AEN */
575 *aen_code = twe_dequeue_aen(sc);
578 /* wait for another AEN to show up */
581 while ((*aen_code = twe_dequeue_aen(sc)) == TWE_AEN_QUEUE_EMPTY) {
582 error = tsleep(&sc->twe_aen_queue, PCATCH, "tweaen", 0);
589 case TWEIO_GET_PARAM:
590 if ((param = twe_get_param(sc, tp->tp_table_id, tp->tp_param_id, tp->tp_size, NULL)) == NULL) {
591 twe_printf(sc, "TWEIO_GET_PARAM failed for 0x%x/0x%x/%d\n",
592 tp->tp_table_id, tp->tp_param_id, tp->tp_size);
595 if (param->parameter_size_bytes > tp->tp_size) {
596 twe_printf(sc, "TWEIO_GET_PARAM parameter too large (%d > %d)\n",
597 param->parameter_size_bytes, tp->tp_size);
600 error = copyout(param->data, tp->tp_data, param->parameter_size_bytes);
602 kfree(param, M_DEVBUF);
606 case TWEIO_SET_PARAM:
607 if ((data = kmalloc(tp->tp_size, M_DEVBUF, M_WAITOK)) == NULL) {
610 error = copyin(tp->tp_data, data, tp->tp_size);
612 error = twe_set_param(sc, tp->tp_table_id, tp->tp_param_id, tp->tp_size, data);
613 kfree(data, M_DEVBUF);
622 error = twe_add_unit(sc, td->td_unit);
626 error = twe_del_unit(sc, td->td_unit);
629 /* XXX implement ATA PASSTHROUGH */
631 /* nothing we understand */
639 /********************************************************************************
640 * Enable the useful interrupts from the controller.
643 twe_enable_interrupts(struct twe_softc *sc)
645 sc->twe_state |= TWE_STATE_INTEN;
647 TWE_CONTROL_CLEAR_ATTENTION_INTERRUPT |
648 TWE_CONTROL_UNMASK_RESPONSE_INTERRUPT |
649 TWE_CONTROL_ENABLE_INTERRUPTS);
652 /********************************************************************************
653 * Disable interrupts from the controller.
656 twe_disable_interrupts(struct twe_softc *sc)
658 TWE_CONTROL(sc, TWE_CONTROL_DISABLE_INTERRUPTS);
659 sc->twe_state &= ~TWE_STATE_INTEN;
662 /********************************************************************************
663 ********************************************************************************
665 ********************************************************************************
666 ********************************************************************************/
668 /********************************************************************************
669 * Read integer parameter table entries.
672 twe_get_param_1(struct twe_softc *sc, int table_id, int param_id, u_int8_t *result)
676 if ((param = twe_get_param(sc, table_id, param_id, 1, NULL)) == NULL)
678 *result = *(u_int8_t *)param->data;
679 kfree(param, M_DEVBUF);
684 twe_get_param_2(struct twe_softc *sc, int table_id, int param_id, u_int16_t *result)
688 if ((param = twe_get_param(sc, table_id, param_id, 2, NULL)) == NULL)
690 *result = *(u_int16_t *)param->data;
691 kfree(param, M_DEVBUF);
696 twe_get_param_4(struct twe_softc *sc, int table_id, int param_id, u_int32_t *result)
700 if ((param = twe_get_param(sc, table_id, param_id, 4, NULL)) == NULL)
702 *result = *(u_int32_t *)param->data;
703 kfree(param, M_DEVBUF);
707 /********************************************************************************
708 * Perform a TWE_OP_GET_PARAM command. If a callback function is provided, it
709 * will be called with the command when it's completed. If no callback is
710 * provided, we will wait for the command to complete and then return just the data.
711 * The caller is responsible for freeing the data when done with it.
714 twe_get_param(struct twe_softc *sc, int table_id, int param_id, size_t param_size,
715 void (* func)(struct twe_request *tr))
717 struct twe_request *tr;
728 if (twe_get_request(sc, &tr))
732 param = (TWE_Param *)kmalloc(TWE_SECTOR_SIZE, M_DEVBUF, M_INTWAIT);
734 tr->tr_length = TWE_SECTOR_SIZE;
735 tr->tr_flags = TWE_CMD_DATAIN | TWE_CMD_DATAOUT;
737 /* build the command for the controller */
738 cmd = &tr->tr_command;
739 cmd->param.opcode = TWE_OP_GET_PARAM;
742 cmd->param.param_count = 1;
744 /* fill in the outbound parameter data */
745 param->table_id = table_id;
746 param->parameter_id = param_id;
747 param->parameter_size_bytes = param_size;
749 /* submit the command and either wait or let the callback handle it */
751 /* XXX could use twe_wait_request here if interrupts were enabled? */
752 error = twe_immediate_request(tr);
754 if (twe_report_request(tr))
759 twe_release_request(tr);
762 tr->tr_complete = func;
763 error = twe_map_request(tr);
764 if ((error == 0) || (error == EBUSY))
768 /* something failed */
772 twe_release_request(tr);
774 kfree(param, M_DEVBUF);
778 /********************************************************************************
779 * Set integer parameter table entries.
781 #ifdef TWE_SHUTDOWN_NOTIFICATION
783 twe_set_param_1(struct twe_softc *sc, int table_id, int param_id, u_int8_t value)
785 return(twe_set_param(sc, table_id, param_id, sizeof(value), &value));
791 twe_set_param_2(struct twe_softc *sc, int table_id, int param_id, u_int16_t value)
793 return(twe_set_param(sc, table_id, param_id, sizeof(value), &value));
797 twe_set_param_4(struct twe_softc *sc, int table_id, int param_id, u_int32_t value)
799 return(twe_set_param(sc, table_id, param_id, sizeof(value), &value));
803 /********************************************************************************
804 * Perform a TWE_OP_SET_PARAM command, returns nonzero on error.
807 twe_set_param(struct twe_softc *sc, int table_id, int param_id, int param_size, void *data)
809 struct twe_request *tr;
821 if (twe_get_request(sc, &tr))
825 param = (TWE_Param *)kmalloc(TWE_SECTOR_SIZE, M_DEVBUF, M_INTWAIT);
827 tr->tr_length = TWE_SECTOR_SIZE;
828 tr->tr_flags = TWE_CMD_DATAIN | TWE_CMD_DATAOUT;
830 /* build the command for the controller */
831 cmd = &tr->tr_command;
832 cmd->param.opcode = TWE_OP_SET_PARAM;
835 cmd->param.param_count = 1;
837 /* fill in the outbound parameter data */
838 param->table_id = table_id;
839 param->parameter_id = param_id;
840 param->parameter_size_bytes = param_size;
841 bcopy(data, param->data, param_size);
843 /* XXX could use twe_wait_request here if interrupts were enabled? */
844 error = twe_immediate_request(tr);
846 if (twe_report_request(tr))
852 twe_release_request(tr);
854 kfree(param, M_DEVBUF);
858 /********************************************************************************
859 * Perform a TWE_OP_INIT_CONNECTION command, returns nonzero on error.
861 * Typically called with interrupts disabled.
864 twe_init_connection(struct twe_softc *sc, int mode)
866 struct twe_request *tr;
873 if (twe_get_request(sc, &tr))
876 /* build the command */
877 cmd = &tr->tr_command;
878 cmd->initconnection.opcode = TWE_OP_INIT_CONNECTION;
879 cmd->initconnection.size = 3;
880 cmd->initconnection.host_id = 0;
881 cmd->initconnection.message_credits = mode;
882 cmd->initconnection.response_queue_pointer = 0;
884 /* submit the command */
885 error = twe_immediate_request(tr);
886 twe_release_request(tr);
888 if (mode == TWE_INIT_MESSAGE_CREDITS)
889 sc->twe_host_id = cmd->initconnection.host_id;
893 /********************************************************************************
894 * Start the command (tr) and sleep waiting for it to complete.
896 * Successfully completed commands are dequeued.
899 twe_wait_request(struct twe_request *tr)
903 tr->tr_flags |= TWE_CMD_SLEEPER;
904 tr->tr_status = TWE_CMD_BUSY;
905 twe_enqueue_ready(tr);
906 twe_startio(tr->tr_sc);
908 while (tr->tr_status == TWE_CMD_BUSY)
909 tsleep(tr, 0, "twewait", 0);
912 return(tr->tr_status != TWE_CMD_COMPLETE);
915 /********************************************************************************
916 * Start the command (tr) and busy-wait for it to complete.
917 * This should only be used when interrupts are actually disabled (although it
918 * will work if they are not).
921 twe_immediate_request(struct twe_request *tr)
927 tr->tr_status = TWE_CMD_BUSY;
928 if ((error = twe_map_request(tr)) != 0)
931 while (tr->tr_status == TWE_CMD_BUSY){
934 return(tr->tr_status != TWE_CMD_COMPLETE);
937 /********************************************************************************
938 * Handle completion of an I/O command.
941 twe_completeio(struct twe_request *tr)
943 struct twe_softc *sc = tr->tr_sc;
944 struct bio *bio = (twe_bio *)tr->tr_private;
945 struct buf *bp = bio->bio_buf;
949 if (tr->tr_status == TWE_CMD_COMPLETE) {
950 if (tr->tr_command.generic.status)
951 if (twe_report_request(tr)) {
953 bp->b_flags |= B_ERROR;
956 twe_panic(sc, "twe_completeio on incomplete command");
958 tr->tr_private = NULL;
960 twe_release_request(tr);
963 /********************************************************************************
964 * Reset the controller and pull all the active commands back onto the ready
965 * queue. Used to restart a controller that's exhibiting bad behaviour.
968 twe_reset(struct twe_softc *sc)
970 struct twe_request *tr;
974 * Sleep for a short period to allow AENs to be signalled.
976 tsleep(sc, 0, "twereset", hz);
979 * Disable interrupts from the controller, and mask any accidental entry
980 * into our interrupt handler.
982 twe_printf(sc, "controller reset in progress...\n");
983 twe_disable_interrupts(sc);
987 * Try to soft-reset the controller.
989 for (i = 0; i < TWE_MAX_RESET_TRIES; i++) {
992 twe_printf(sc, "reset %d failed, trying again\n", i);
994 if (!twe_soft_reset(sc))
995 break; /* reset process complete */
997 /* did we give up? */
998 if (i >= TWE_MAX_RESET_TRIES) {
999 twe_printf(sc, "can't reset controller, giving up\n");
1004 * Move all of the commands that were busy back to the ready queue.
1007 while ((tr = twe_dequeue_busy(sc)) != NULL) {
1008 twe_enqueue_ready(tr);
1013 * Kick the controller to start things going again, then re-enable interrupts.
1016 twe_enable_interrupts(sc);
1017 twe_printf(sc, "controller reset done, %d commands restarted\n", i);
1021 twe_enable_interrupts(sc);
1024 /********************************************************************************
1025 ********************************************************************************
1026 Command I/O to Controller
1027 ********************************************************************************
1028 ********************************************************************************/
1030 /********************************************************************************
1031 * Try to deliver (tr) to the controller.
1033 * Can be called at any interrupt level, with or without interrupts enabled.
1036 twe_start(struct twe_request *tr)
1038 struct twe_softc *sc = tr->tr_sc;
1040 u_int32_t status_reg;
1044 /* mark the command as currently being processed */
1045 tr->tr_status = TWE_CMD_BUSY;
1048 * Spin briefly waiting for the controller to come ready
1050 * XXX it might be more efficient to return EBUSY immediately
1051 * and let the command be rescheduled.
1053 for (i = 100000, done = 0; (i > 0) && !done; i--) {
1056 /* check to see if we can post a command */
1057 status_reg = TWE_STATUS(sc);
1058 twe_check_bits(sc, status_reg);
1060 if (!(status_reg & TWE_STATUS_COMMAND_QUEUE_FULL)) {
1061 /* move command to work queue */
1062 twe_enqueue_busy(tr);
1063 TWE_COMMAND_QUEUE(sc, tr->tr_cmdphys);
1066 if (tr->tr_complete != NULL) {
1067 debug(3, "queued request %d with callback %p", tr->tr_command.generic.request_id, tr->tr_complete);
1068 } else if (tr->tr_flags & TWE_CMD_SLEEPER) {
1069 debug(3, "queued request %d with wait channel %p", tr->tr_command.generic.request_id, tr);
1071 debug(3, "queued request %d for polling caller", tr->tr_command.generic.request_id);
1075 crit_exit(); /* drop critical section to allow completion interrupts */
1078 /* command is enqueued */
1083 * We couldn't get the controller to take the command; try submitting it again later.
1084 * This should only happen if something is wrong with the controller, or if we have
1085 * overestimated the number of commands it can accept. (Should we actually reject
1086 * the command at this point?)
1091 /********************************************************************************
1092 * Poll the controller (sc) for completed commands.
1094 * Can be called at any interrupt level, with or without interrupts enabled.
1097 twe_done(struct twe_softc *sc)
1099 TWE_Response_Queue rq;
1100 struct twe_request *tr;
1102 u_int32_t status_reg;
1106 /* loop collecting completed commands */
1110 status_reg = TWE_STATUS(sc);
1111 twe_check_bits(sc, status_reg); /* XXX should this fail? */
1113 if (!(status_reg & TWE_STATUS_RESPONSE_QUEUE_EMPTY)) {
1115 rq = TWE_RESPONSE_QUEUE(sc);
1116 tr = sc->twe_lookup[rq.u.response_id]; /* find command */
1117 if (tr->tr_status != TWE_CMD_BUSY)
1118 twe_printf(sc, "completion event for nonbusy command\n");
1119 tr->tr_status = TWE_CMD_COMPLETE;
1120 debug(3, "completed request id %d with status %d",
1121 tr->tr_command.generic.request_id, tr->tr_command.generic.status);
1122 /* move to completed queue */
1123 twe_remove_busy(tr);
1124 twe_enqueue_complete(tr);
1125 sc->twe_state &= ~TWE_STATE_CTLR_BUSY;
1127 break; /* no response ready */
1132 /* if we've completed any commands, try posting some more */
1136 /* handle completion and timeouts */
1137 twe_complete(sc); /* XXX use deferred completion? */
1140 /********************************************************************************
1141 * Perform post-completion processing for commands on (sc).
1143 * This is split from twe_done as it can be safely deferred and run at a lower
1144 * priority level should facilities for such a thing become available.
1147 twe_complete(struct twe_softc *sc)
1149 struct twe_request *tr;
1154 * Pull commands off the completed list, dispatch them appropriately
1156 while ((tr = twe_dequeue_complete(sc)) != NULL) {
1158 /* unmap the command's data buffer */
1159 twe_unmap_request(tr);
1161 /* dispatch to suit command originator */
1162 if (tr->tr_complete != NULL) { /* completion callback */
1163 debug(2, "call completion handler %p", tr->tr_complete);
1164 tr->tr_complete(tr);
1166 } else if (tr->tr_flags & TWE_CMD_SLEEPER) { /* caller is asleep waiting */
1167 debug(2, "wake up command owner on %p", tr);
1170 } else { /* caller is polling command */
1171 debug(2, "command left for owner");
1176 /********************************************************************************
1177 * Wait for (status) to be set in the controller status register for up to
1178 * (timeout) seconds. Returns 0 if found, nonzero if we time out.
1180 * Note: this busy-waits, rather than sleeping, since we may be called with
1181 * eg. clock interrupts masked.
1184 twe_wait_status(struct twe_softc *sc, u_int32_t status, int timeout)
1187 u_int32_t status_reg;
1191 expiry = time_second + timeout;
1194 status_reg = TWE_STATUS(sc);
1195 if (status_reg & status) /* got the required bit(s)? */
1198 } while (time_second <= expiry);
1203 /********************************************************************************
1204 * Drain the response queue, which may contain responses to commands we know
1208 twe_drain_response_queue(struct twe_softc *sc)
1210 TWE_Response_Queue rq;
1211 u_int32_t status_reg;
1215 for (;;) { /* XXX give up eventually? */
1216 status_reg = TWE_STATUS(sc);
1217 if (twe_check_bits(sc, status_reg))
1219 if (status_reg & TWE_STATUS_RESPONSE_QUEUE_EMPTY)
1221 rq = TWE_RESPONSE_QUEUE(sc);
1225 /********************************************************************************
1226 * Soft-reset the controller
1229 twe_soft_reset(struct twe_softc *sc)
1231 u_int32_t status_reg;
1237 if (twe_wait_status(sc, TWE_STATUS_ATTENTION_INTERRUPT, 30)) {
1238 twe_printf(sc, "no attention interrupt\n");
1241 TWE_CONTROL(sc, TWE_CONTROL_CLEAR_ATTENTION_INTERRUPT);
1242 if (twe_drain_aen_queue(sc)) {
1243 twe_printf(sc, "can't drain AEN queue\n");
1246 if (twe_find_aen(sc, TWE_AEN_SOFT_RESET)) {
1247 twe_printf(sc, "reset not reported\n");
1250 status_reg = TWE_STATUS(sc);
1251 if (TWE_STATUS_ERRORS(status_reg) || twe_check_bits(sc, status_reg)) {
1252 twe_printf(sc, "controller errors detected\n");
1255 if (twe_drain_response_queue(sc)) {
1256 twe_printf(sc, "can't drain response queue\n");
1262 /********************************************************************************
1263 ********************************************************************************
1265 ********************************************************************************
1266 ********************************************************************************/
1268 /********************************************************************************
1271 * XXX what does this mean?
1274 twe_host_intr(struct twe_softc *sc)
1278 twe_printf(sc, "host interrupt\n");
1279 TWE_CONTROL(sc, TWE_CONTROL_CLEAR_HOST_INTERRUPT);
1282 /********************************************************************************
1283 * Attention interrupt.
1285 * Signalled when the controller has one or more AENs for us.
1288 twe_attention_intr(struct twe_softc *sc)
1292 /* instigate a poll for AENs */
1293 if (twe_fetch_aen(sc)) {
1294 twe_printf(sc, "error polling for signalled AEN\n");
1296 TWE_CONTROL(sc, TWE_CONTROL_CLEAR_ATTENTION_INTERRUPT);
1300 /********************************************************************************
1301 * Command interrupt.
1303 * Signalled when the controller can handle more commands.
1306 twe_command_intr(struct twe_softc *sc)
1311 * We don't use this, rather we try to submit commands when we receive
1312 * them, and when other commands have completed. Mask it so we don't get
1314 twe_printf(sc, "command interrupt\n");
1316 TWE_CONTROL(sc, TWE_CONTROL_MASK_COMMAND_INTERRUPT);
1319 /********************************************************************************
1320 ********************************************************************************
1321 Asynchronous Event Handling
1322 ********************************************************************************
1323 ********************************************************************************/
1325 /********************************************************************************
1326 * Request an AEN from the controller.
1329 twe_fetch_aen(struct twe_softc *sc)
1334 if ((twe_get_param(sc, TWE_PARAM_AEN, TWE_PARAM_AEN_UnitCode, 2, twe_handle_aen)) == NULL)
1339 /********************************************************************************
1340 * Handle an AEN returned by the controller.
1343 twe_handle_aen(struct twe_request *tr)
1345 struct twe_softc *sc = tr->tr_sc;
1351 /* XXX check for command success somehow? */
1353 param = (TWE_Param *)tr->tr_data;
1354 aen = *(u_int16_t *)(param->data);
1356 kfree(tr->tr_data, M_DEVBUF);
1357 twe_release_request(tr);
1358 twe_enqueue_aen(sc, aen);
1360 /* XXX poll for more AENs? */
1363 /********************************************************************************
1364 * Pull AENs out of the controller and park them in the queue, in a context where
1365 * interrupts aren't active. Return nonzero if we encounter any errors in the
1366 * process of obtaining all the available AENs.
1369 twe_drain_aen_queue(struct twe_softc *sc)
1374 if (twe_get_param_2(sc, TWE_PARAM_AEN, TWE_PARAM_AEN_UnitCode, &aen))
1376 if (aen == TWE_AEN_QUEUE_EMPTY)
1378 twe_enqueue_aen(sc, aen);
1382 /********************************************************************************
1383 * Push an AEN that we've received onto the queue.
1385 * Note that we have to lock this against reentrance, since it may be called
1386 * from both interrupt and non-interrupt context.
1388 * If someone is waiting for the AEN we have, wake them up.
1391 twe_enqueue_aen(struct twe_softc *sc, u_int16_t aen)
1398 if ((msg = twe_format_aen(sc, aen)) != NULL)
1399 twe_printf(sc, "AEN: <%s>\n", msg);
1402 /* enqueue the AEN */
1403 next = ((sc->twe_aen_head + 1) % TWE_Q_LENGTH);
1404 nextnext = ((sc->twe_aen_head + 2) % TWE_Q_LENGTH);
1406 /* check to see if this is the last free slot, and subvert the AEN if it is */
1407 if (nextnext == sc->twe_aen_tail)
1408 aen = TWE_AEN_QUEUE_FULL;
1410 /* look to see if there's room for this AEN */
1411 if (next != sc->twe_aen_tail) {
1412 sc->twe_aen_queue[sc->twe_aen_head] = aen;
1413 sc->twe_aen_head = next;
1416 /* wake up anyone asleep on the queue */
1417 wakeup(&sc->twe_aen_queue);
1419 /* anyone looking for this AEN? */
1420 if (sc->twe_wait_aen == aen) {
1421 sc->twe_wait_aen = -1;
1422 wakeup(&sc->twe_wait_aen);
1427 /********************************************************************************
1428 * Pop an AEN off the queue, or return -1 if there are none left.
1430 * We are more or less interrupt-safe, so don't block interrupts.
1433 twe_dequeue_aen(struct twe_softc *sc)
1439 if (sc->twe_aen_tail == sc->twe_aen_head) {
1440 result = TWE_AEN_QUEUE_EMPTY;
1442 result = sc->twe_aen_queue[sc->twe_aen_tail];
1443 sc->twe_aen_tail = ((sc->twe_aen_tail + 1) % TWE_Q_LENGTH);
1448 /********************************************************************************
1449 * Check to see if the requested AEN is in the queue.
1451 * XXX we could probably avoid masking interrupts here
1454 twe_find_aen(struct twe_softc *sc, u_int16_t aen)
1460 for (i = sc->twe_aen_tail; (i != sc->twe_aen_head) && missing; i = (i + 1) % TWE_Q_LENGTH) {
1461 if (sc->twe_aen_queue[i] == aen)
1469 #if 0 /* currently unused */
1470 /********************************************************************************
1471 * Sleep waiting for at least (timeout) seconds until we see (aen) as
1472 * requested. Returns nonzero on timeout or failure.
1474 * XXX: this should not be used in cases where there may be more than one sleeper
1475 * without a mechanism for registering multiple sleepers.
1478 twe_wait_aen(struct twe_softc *sc, int aen, int timeout)
1485 expiry = time_second + timeout;
1489 sc->twe_wait_aen = aen;
1492 tsleep(&sc->twe_wait_aen, PZERO, "twewaen", hz);
1493 if (sc->twe_wait_aen == -1)
1495 } while ((time_second <= expiry) && !found);
1501 /********************************************************************************
1502 ********************************************************************************
1503 Command Buffer Management
1504 ********************************************************************************
1505 ********************************************************************************/
1507 /********************************************************************************
1508 * Get a new command buffer.
1510 * This will return NULL if all command buffers are in use.
1513 twe_get_request(struct twe_softc *sc, struct twe_request **tr)
1517 /* try to reuse an old buffer */
1518 *tr = twe_dequeue_free(sc);
1520 /* initialise some fields to their defaults */
1522 (*tr)->tr_data = NULL;
1523 (*tr)->tr_private = NULL;
1524 (*tr)->tr_status = TWE_CMD_SETUP; /* command is in setup phase */
1525 (*tr)->tr_flags = 0;
1526 (*tr)->tr_complete = NULL;
1527 (*tr)->tr_command.generic.status = 0; /* before submission to controller */
1528 (*tr)->tr_command.generic.flags = 0; /* not used */
1530 return(*tr == NULL);
1533 /********************************************************************************
1534 * Release a command buffer for reuse.
1538 twe_release_request(struct twe_request *tr)
1542 if (tr->tr_private != NULL)
1543 twe_panic(tr->tr_sc, "tr_private != NULL");
1544 twe_enqueue_free(tr);
1547 /********************************************************************************
1548 ********************************************************************************
1550 ********************************************************************************
1551 ********************************************************************************/
1553 /********************************************************************************
1554 * Print some information about the controller
1557 twe_describe_controller(struct twe_softc *sc)
1566 /* get the port count */
1567 twe_get_param_1(sc, TWE_PARAM_CONTROLLER, TWE_PARAM_CONTROLLER_PortCount, &ports);
1569 /* get version strings */
1570 p[0] = twe_get_param(sc, TWE_PARAM_VERSION, TWE_PARAM_VERSION_FW, 16, NULL);
1571 p[1] = twe_get_param(sc, TWE_PARAM_VERSION, TWE_PARAM_VERSION_BIOS, 16, NULL);
1574 twe_printf(sc, "%d ports, Firmware %.16s, BIOS %.16s\n", ports, p[0]->data, p[1]->data);
1576 p[2] = twe_get_param(sc, TWE_PARAM_VERSION, TWE_PARAM_VERSION_Mon, 16, NULL);
1577 p[3] = twe_get_param(sc, TWE_PARAM_VERSION, TWE_PARAM_VERSION_PCB, 8, NULL);
1578 p[4] = twe_get_param(sc, TWE_PARAM_VERSION, TWE_PARAM_VERSION_ATA, 8, NULL);
1579 p[5] = twe_get_param(sc, TWE_PARAM_VERSION, TWE_PARAM_VERSION_PCI, 8, NULL);
1581 if (p[2] && p[3] && p[4] && p[5])
1582 twe_printf(sc, "Monitor %.16s, PCB %.8s, Achip %.8s, Pchip %.8s\n",
1583 p[2]->data, p[3]->data, p[4]->data, p[5]->data);
1586 kfree(p[2], M_DEVBUF);
1588 kfree(p[3], M_DEVBUF);
1590 kfree(p[4], M_DEVBUF);
1592 kfree(p[5], M_DEVBUF);
1595 kfree(p[0], M_DEVBUF);
1597 kfree(p[1], M_DEVBUF);
1599 /* print attached drives */
1601 p[0] = twe_get_param(sc, TWE_PARAM_DRIVESUMMARY, TWE_PARAM_DRIVESUMMARY_Status, 16, NULL);
1602 for (i = 0; i < ports; i++) {
1603 if (p[0]->data[i] != TWE_PARAM_DRIVESTATUS_Present)
1605 twe_get_param_4(sc, TWE_PARAM_DRIVEINFO + i, TWE_PARAM_DRIVEINFO_Size, &size);
1606 p[1] = twe_get_param(sc, TWE_PARAM_DRIVEINFO + i, TWE_PARAM_DRIVEINFO_Model, 40, NULL);
1608 twe_printf(sc, "port %d: %.40s %dMB\n", i, p[1]->data, size / 2048);
1609 kfree(p[1], M_DEVBUF);
1611 twe_printf(sc, "port %d, drive status unavailable\n", i);
1615 kfree(p[0], M_DEVBUF);
1620 /********************************************************************************
1621 * Look up a text description of a numeric code and return a pointer to same.
1624 twe_describe_code(struct twe_code_lookup *table, u_int32_t code)
1628 for (i = 0; table[i].string != NULL; i++)
1629 if (table[i].code == code)
1630 return(table[i].string);
1631 return(table[i+1].string);
1635 /********************************************************************************
1636 * Complain if the status bits aren't what we're expecting.
1638 * Rate-limit the complaints to at most one of each every five seconds, but
1639 * always return the correct status.
1642 twe_check_bits(struct twe_softc *sc, u_int32_t status_reg)
1645 static time_t lastwarn[2] = {0, 0};
1648 * This can be a little problematic, as twe_panic may call twe_reset if
1649 * TWE_DEBUG is not set, which will call us again as part of the soft reset.
1651 if ((status_reg & TWE_STATUS_PANIC_BITS) != 0) {
1652 twe_printf(sc, "FATAL STATUS BIT(S) %b\n", status_reg & TWE_STATUS_PANIC_BITS,
1653 TWE_STATUS_BITS_DESCRIPTION);
1654 twe_panic(sc, "fatal status bits");
1658 if ((status_reg & TWE_STATUS_EXPECTED_BITS) != TWE_STATUS_EXPECTED_BITS) {
1659 if (time_second > (lastwarn[0] + 5)) {
1660 twe_printf(sc, "missing expected status bit(s) %b\n", ~status_reg & TWE_STATUS_EXPECTED_BITS,
1661 TWE_STATUS_BITS_DESCRIPTION);
1662 lastwarn[0] = time_second;
1667 if ((status_reg & TWE_STATUS_UNEXPECTED_BITS) != 0) {
1668 if (time_second > (lastwarn[1] + 5)) {
1669 twe_printf(sc, "unexpected status bit(s) %b\n", status_reg & TWE_STATUS_UNEXPECTED_BITS,
1670 TWE_STATUS_BITS_DESCRIPTION);
1671 lastwarn[1] = time_second;
1674 if (status_reg & TWE_STATUS_PCI_PARITY_ERROR) {
1675 twe_printf(sc, "PCI parity error: Reseat card, move card or buggy device present.");
1676 twe_clear_pci_parity_error(sc);
1678 if (status_reg & TWE_STATUS_PCI_ABORT) {
1679 twe_printf(sc, "PCI abort, clearing.");
1680 twe_clear_pci_abort(sc);
1687 /********************************************************************************
1688 * Return a string describing (aen).
1690 * The low 8 bits of the aen are the code, the high 8 bits give the unit number
1691 * where an AEN is specific to a unit.
1693 * Note that we could expand this routine to handle eg. up/downgrading the status
1694 * of a drive if we had some idea of what the drive's initial status was.
1698 twe_format_aen(struct twe_softc *sc, u_int16_t aen)
1700 static char buf[80];
1704 code = twe_describe_code(twe_table_aen, TWE_AEN_CODE(aen));
1716 if ((child = sc->twe_drive[TWE_AEN_UNIT(aen)].td_disk) != NULL) {
1717 sprintf(buf, "twed%d: %s", device_get_unit(child), msg);
1719 sprintf(buf, "twe%d: %s for unknown unit %d", device_get_unit(sc->twe_dev),
1720 msg, TWE_AEN_UNIT(aen));
1725 sprintf(buf, "twe%d: port %d: %s", device_get_unit(sc->twe_dev), TWE_AEN_UNIT(aen),
1734 sprintf(buf, "unknown AEN 0x%x", aen);
1738 /********************************************************************************
1739 * Print a diagnostic if the status of the command warrants it, and return
1740 * either zero (command was ok) or nonzero (command failed).
1743 twe_report_request(struct twe_request *tr)
1745 struct twe_softc *sc = tr->tr_sc;
1746 TWE_Command *cmd = &tr->tr_command;
1750 * Check the command status value and handle accordingly.
1752 if (cmd->generic.status == TWE_STATUS_RESET) {
1754 * The status code 0xff requests a controller reset.
1756 twe_printf(sc, "command returned with controller reset request\n");
1759 } else if (cmd->generic.status > TWE_STATUS_FATAL) {
1761 * Fatal errors that don't require controller reset.
1763 * We know a few special flags values.
1765 switch (cmd->generic.flags) {
1767 device_printf(sc->twe_drive[cmd->generic.unit].td_disk,
1771 device_printf(sc->twe_drive[cmd->generic.unit].td_disk,
1772 "unrecoverable drive error");
1775 device_printf(sc->twe_drive[cmd->generic.unit].td_disk,
1776 "controller error - %s (flags = 0x%x)\n",
1777 twe_describe_code(twe_table_status, cmd->generic.status),
1778 cmd->generic.flags);
1781 } else if (cmd->generic.status > TWE_STATUS_WARNING) {
1783 * Warning level status.
1785 device_printf(sc->twe_drive[cmd->generic.unit].td_disk,
1786 "warning - %s (flags = 0x%x)\n",
1787 twe_describe_code(twe_table_status, cmd->generic.status),
1788 cmd->generic.flags);
1789 } else if (cmd->generic.status > 0x40) {
1791 * Info level status.
1793 device_printf(sc->twe_drive[cmd->generic.unit].td_disk,
1794 "attention - %s (flags = 0x%x)\n",
1795 twe_describe_code(twe_table_status, cmd->generic.status),
1796 cmd->generic.flags);
1802 /********************************************************************************
1803 * Print some controller state to aid in debugging error/panic conditions
1806 twe_print_controller(struct twe_softc *sc)
1808 u_int32_t status_reg;
1810 status_reg = TWE_STATUS(sc);
1811 twe_printf(sc, "status %b\n", status_reg, TWE_STATUS_BITS_DESCRIPTION);
1812 twe_printf(sc, " current max min\n");
1813 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);
1814 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);
1815 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);
1816 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);
1817 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);
1818 twe_printf(sc, "AEN queue head %d tail %d\n", sc->twe_aen_head, sc->twe_aen_tail);
1822 twe_panic(struct twe_softc *sc, char *reason)
1824 twe_print_controller(sc);
1833 /********************************************************************************
1834 * Print a request/command in human-readable format.
1837 twe_print_request(struct twe_request *tr)
1839 struct twe_softc *sc = tr->tr_sc;
1840 TWE_Command *cmd = &tr->tr_command;
1843 twe_printf(sc, "CMD: request_id %d opcode <%s> size %d unit %d host_id %d\n",
1844 cmd->generic.request_id, twe_describe_code(twe_table_opcode, cmd->generic.opcode), cmd->generic.size,
1845 cmd->generic.unit, cmd->generic.host_id);
1846 twe_printf(sc, " status %d flags 0x%x count %d sgl_offset %d\n",
1847 cmd->generic.status, cmd->generic.flags, cmd->generic.count, cmd->generic.sgl_offset);
1849 switch(cmd->generic.opcode) { /* XXX add more opcodes? */
1852 twe_printf(sc, " lba %d\n", cmd->io.lba);
1853 for (i = 0; (i < TWE_MAX_SGL_LENGTH) && (cmd->io.sgl[i].length != 0); i++)
1854 twe_printf(sc, " %d: 0x%x/%d\n",
1855 i, cmd->io.sgl[i].address, cmd->io.sgl[i].length);
1858 case TWE_OP_GET_PARAM:
1859 case TWE_OP_SET_PARAM:
1860 for (i = 0; (i < TWE_MAX_SGL_LENGTH) && (cmd->param.sgl[i].length != 0); i++)
1861 twe_printf(sc, " %d: 0x%x/%d\n",
1862 i, cmd->param.sgl[i].address, cmd->param.sgl[i].length);
1865 case TWE_OP_INIT_CONNECTION:
1866 twe_printf(sc, " response queue pointer 0x%x\n",
1867 cmd->initconnection.response_queue_pointer);
1873 twe_printf(sc, " tr_command %p/0x%x tr_data %p/0x%x,%d\n",
1874 tr, tr->tr_cmdphys, tr->tr_data, tr->tr_dataphys, tr->tr_length);
1875 twe_printf(sc, " tr_status %d tr_flags 0x%x tr_complete %p tr_private %p\n",
1876 tr->tr_status, tr->tr_flags, tr->tr_complete, tr->tr_private);