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
33 * Driver for the 3ware Escalade family of IDE RAID controllers.
36 #include <dev/twe/twe_compat.h>
37 #include <dev/twe/twereg.h>
38 #include <dev/twe/tweio.h>
39 #include <dev/twe/twevar.h>
40 #define TWE_DEFINE_TABLES
41 #include <dev/twe/twe_tables.h>
46 static int twe_get_param_1(struct twe_softc *sc, int table_id, int param_id, u_int8_t *result);
47 static int twe_get_param_2(struct twe_softc *sc, int table_id, int param_id, u_int16_t *result);
48 static int twe_get_param_4(struct twe_softc *sc, int table_id, int param_id, u_int32_t *result);
49 static void *twe_get_param(struct twe_softc *sc, int table_id, int parameter_id, size_t size,
50 void (* func)(struct twe_request *tr));
51 #ifdef TWE_SHUTDOWN_NOTIFICATION
52 static int twe_set_param_1(struct twe_softc *sc, int table_id, int param_id, u_int8_t value);
55 static int twe_set_param_2(struct twe_softc *sc, int table_id, int param_id, u_int16_t value);
56 static int twe_set_param_4(struct twe_softc *sc, int table_id, int param_id, u_int32_t value);
58 static int twe_set_param(struct twe_softc *sc, int table_id, int param_id, int param_size,
60 static int twe_init_connection(struct twe_softc *sc, int mode);
61 static int twe_wait_request(struct twe_request *tr);
62 static int twe_immediate_request(struct twe_request *tr, int usetmp);
63 static void twe_completeio(struct twe_request *tr);
64 static void twe_reset(struct twe_softc *sc);
65 static int twe_add_unit(struct twe_softc *sc, int unit);
66 static int twe_del_unit(struct twe_softc *sc, int unit);
69 * Command I/O to controller.
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 u_int16_t 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;
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, i)) == NULL)
144 * Set global defaults that won't change.
146 cmd = TWE_FIND_COMMAND(tr);
147 cmd->generic.host_id = sc->twe_host_id; /* controller-assigned host ID */
148 cmd->generic.request_id = i; /* our index number */
149 sc->twe_lookup[i] = tr;
152 * Put command onto the freelist.
154 twe_release_request(tr);
158 * Check status register for errors, clear them.
160 status_reg = TWE_STATUS(sc);
161 twe_check_bits(sc, status_reg);
164 * Wait for the controller to come ready.
166 if (twe_wait_status(sc, TWE_STATUS_MICROCONTROLLER_READY, 60)) {
167 twe_printf(sc, "microcontroller not ready\n");
172 * Disable interrupts from the card.
174 twe_disable_interrupts(sc);
177 * Soft reset the controller, look for the AEN acknowledging the reset,
178 * check for errors, drain the response queue.
180 for (i = 0; i < TWE_MAX_RESET_TRIES; i++) {
183 twe_printf(sc, "reset %d failed, trying again\n", i);
185 if (!twe_soft_reset(sc))
186 break; /* reset process complete */
188 /* did we give up? */
189 if (i >= TWE_MAX_RESET_TRIES) {
190 twe_printf(sc, "can't initialise controller, giving up\n");
198 twe_add_unit(struct twe_softc *sc, int unit)
200 struct twe_drive *dr;
201 int table, error = 0;
203 TWE_Param *drives = NULL, *param = NULL;
204 TWE_Array_Descriptor *ud;
206 if (unit < 0 || unit > TWE_MAX_UNITS)
210 * The controller is in a safe state, so try to find drives attached to it.
212 if ((drives = twe_get_param(sc, TWE_PARAM_UNITSUMMARY, TWE_PARAM_UNITSUMMARY_Status,
213 TWE_MAX_UNITS, NULL)) == NULL) {
214 twe_printf(sc, "can't detect attached units\n");
218 dr = &sc->twe_drive[unit];
219 /* check that the drive is online */
220 if (!(drives->data[unit] & TWE_PARAM_UNITSTATUS_Online)) {
225 table = TWE_PARAM_UNITINFO + unit;
227 if (twe_get_param_4(sc, table, TWE_PARAM_UNITINFO_Capacity, &dr->td_size)) {
228 twe_printf(sc, "error fetching capacity for unit %d\n", unit);
232 if (twe_get_param_1(sc, table, TWE_PARAM_UNITINFO_Status, &dr->td_state)) {
233 twe_printf(sc, "error fetching state for unit %d\n", unit);
237 if (twe_get_param_2(sc, table, TWE_PARAM_UNITINFO_DescriptorSize, &dsize)) {
238 twe_printf(sc, "error fetching descriptor size for unit %d\n", unit);
242 if ((param = twe_get_param(sc, table, TWE_PARAM_UNITINFO_Descriptor, dsize - 3, NULL)) == NULL) {
243 twe_printf(sc, "error fetching descriptor for unit %d\n", unit);
247 ud = (TWE_Array_Descriptor *)param->data;
248 dr->td_type = ud->configuration;
249 dr->td_stripe = ud->stripe_size;
251 /* build synthetic geometry as per controller internal rules */
252 if (dr->td_size > 0x200000) {
259 dr->td_cylinders = dr->td_size / (dr->td_heads * dr->td_sectors);
260 dr->td_twe_unit = unit;
262 error = twe_attach_drive(sc, dr);
266 free(param, M_DEVBUF);
268 free(drives, M_DEVBUF);
273 twe_del_unit(struct twe_softc *sc, int unit)
277 if (unit < 0 || unit >= TWE_MAX_UNITS)
280 if (sc->twe_drive[unit].td_disk == NULL)
283 error = twe_detach_drive(sc, unit);
287 /********************************************************************************
288 * Locate disk devices and attach children to them.
291 twe_init(struct twe_softc *sc)
298 for (i = 0; i < TWE_MAX_UNITS; i++)
302 * Initialise connection with controller.
304 twe_init_connection(sc, TWE_INIT_MESSAGE_CREDITS);
306 #ifdef TWE_SHUTDOWN_NOTIFICATION
308 * Tell the controller we support shutdown notification.
310 twe_set_param_1(sc, TWE_PARAM_FEATURES, TWE_PARAM_FEATURES_DriverShutdown, 1);
314 * Mark controller up and ready to run.
316 sc->twe_state &= ~TWE_STATE_SHUTDOWN;
319 * Finally enable interrupts.
321 twe_enable_interrupts(sc);
324 /********************************************************************************
325 * Stop the controller
328 twe_deinit(struct twe_softc *sc)
331 * Mark the controller as shutting down, and disable any further interrupts.
333 sc->twe_state |= TWE_STATE_SHUTDOWN;
334 twe_disable_interrupts(sc);
336 #ifdef TWE_SHUTDOWN_NOTIFICATION
338 * Disconnect from the controller
340 twe_init_connection(sc, TWE_SHUTDOWN_MESSAGE_CREDITS);
344 /*******************************************************************************
345 * Take an interrupt, or be poked by other code to look for interrupt-worthy
349 twe_intr(struct twe_softc *sc)
351 u_int32_t status_reg;
356 * Collect current interrupt status.
358 status_reg = TWE_STATUS(sc);
359 twe_check_bits(sc, status_reg);
362 * Dispatch based on interrupt status
364 if (status_reg & TWE_STATUS_HOST_INTERRUPT)
366 if (status_reg & TWE_STATUS_ATTENTION_INTERRUPT)
367 twe_attention_intr(sc);
368 if (status_reg & TWE_STATUS_COMMAND_INTERRUPT)
369 twe_command_intr(sc);
370 if (status_reg & TWE_STATUS_RESPONSE_INTERRUPT)
374 /********************************************************************************
375 * Pull as much work off the softc's work queue as possible and give it to the
379 twe_startio(struct twe_softc *sc)
381 struct twe_request *tr;
388 if (sc->twe_state & (TWE_STATE_CTLR_BUSY | TWE_STATE_FRZN))
391 /* spin until something prevents us from doing any work */
394 /* try to get a command that's already ready to go */
395 tr = twe_dequeue_ready(sc);
397 /* build a command from an outstanding bio */
400 /* get a command to handle the bio with */
401 if (twe_get_request(sc, &tr))
404 /* see if there's work to be done */
405 if ((bp = twe_dequeue_bio(sc)) == NULL) {
406 twe_release_request(tr);
410 /* connect the bio to the command */
411 tr->tr_complete = twe_completeio;
413 tr->tr_data = TWE_BIO_DATA(bp);
414 tr->tr_length = TWE_BIO_LENGTH(bp);
415 cmd = TWE_FIND_COMMAND(tr);
416 if (TWE_BIO_IS_READ(bp)) {
417 tr->tr_flags |= TWE_CMD_DATAIN;
418 cmd->io.opcode = TWE_OP_READ;
420 tr->tr_flags |= TWE_CMD_DATAOUT;
421 cmd->io.opcode = TWE_OP_WRITE;
424 /* build a suitable I/O command (assumes 512-byte rounded transfers) */
426 cmd->io.unit = TWE_BIO_UNIT(bp);
427 cmd->io.block_count = (tr->tr_length + TWE_BLOCK_SIZE - 1) / TWE_BLOCK_SIZE;
428 cmd->io.lba = TWE_BIO_LBA(bp);
431 /* did we find something to do? */
435 /* try to map and submit the command to controller */
436 error = twe_map_request(tr);
441 tr->tr_status = TWE_CMD_ERROR;
442 if (tr->tr_private != NULL) {
443 bp = (twe_bio *)(tr->tr_private);
444 TWE_BIO_SET_ERROR(bp, error);
445 tr->tr_private = NULL;
447 twe_release_request(tr);
448 } else if (tr->tr_flags & TWE_CMD_SLEEPER)
449 wakeup_one(tr); /* wakeup the sleeping owner */
454 /********************************************************************************
455 * Write blocks from memory to disk, for system crash dumps.
458 twe_dump_blocks(struct twe_softc *sc, int unit, u_int32_t lba, void *data, int nblks)
460 struct twe_request *tr;
464 if (twe_get_request(sc, &tr))
468 tr->tr_status = TWE_CMD_SETUP;
469 tr->tr_length = nblks * TWE_BLOCK_SIZE;
470 tr->tr_flags = TWE_CMD_DATAOUT;
472 cmd = TWE_FIND_COMMAND(tr);
473 cmd->io.opcode = TWE_OP_WRITE;
476 cmd->io.block_count = nblks;
479 error = twe_immediate_request(tr, 0);
481 if (twe_report_request(tr))
483 twe_release_request(tr);
487 /********************************************************************************
488 * Handle controller-specific control operations.
491 twe_ioctl(struct twe_softc *sc, int ioctlcmd, void *addr)
493 struct twe_usercommand *tu = (struct twe_usercommand *)addr;
494 struct twe_paramcommand *tp = (struct twe_paramcommand *)addr;
495 struct twe_drivecommand *td = (struct twe_drivecommand *)addr;
496 union twe_statrequest *ts = (union twe_statrequest *)addr;
500 u_int16_t *aen_code = (u_int16_t *)addr;
501 struct twe_request *tr;
507 /* handle a command from userspace */
510 while (twe_get_request(sc, &tr))
511 tsleep(sc, PPAUSE, "twioctl", hz);
514 * Save the command's request ID, copy the user-supplied command in,
515 * restore the request ID.
517 cmd = TWE_FIND_COMMAND(tr);
518 srid = cmd->generic.request_id;
519 bcopy(&tu->tu_command, cmd, sizeof(TWE_Command));
520 cmd->generic.request_id = srid;
523 * if there's a data buffer, allocate and copy it in.
524 * Must be in multipled of 512 bytes.
526 tr->tr_length = (tu->tu_size + 511) & ~511;
527 if (tr->tr_length > 0) {
528 if ((tr->tr_data = malloc(tr->tr_length, M_DEVBUF, M_WAITOK)) == NULL) {
532 if ((error = copyin(tu->tu_data, tr->tr_data, tu->tu_size)) != 0)
534 tr->tr_flags |= TWE_CMD_DATAIN | TWE_CMD_DATAOUT;
537 /* run the command */
538 error = twe_wait_request(tr);
542 /* copy the command out again */
543 bcopy(cmd, &tu->tu_command, sizeof(TWE_Command));
545 /* if there was a data buffer, copy it out */
546 if (tr->tr_length > 0)
547 error = copyout(tr->tr_data, tu->tu_data, tu->tu_size);
551 if (tr->tr_data != NULL)
552 free(tr->tr_data, M_DEVBUF);
554 twe_release_request(tr);
558 /* fetch statistics counter */
560 switch (ts->ts_item) {
561 #ifdef TWE_PERFORMANCE_MONITOR
567 bcopy(&sc->twe_qstat[ts->ts_item], &ts->ts_qstat, sizeof(struct twe_qstat));
576 /* poll for an AEN */
578 *aen_code = twe_dequeue_aen(sc);
581 /* wait for another AEN to show up */
584 while ((*aen_code = twe_dequeue_aen(sc)) == TWE_AEN_QUEUE_EMPTY) {
585 error = tsleep(&sc->twe_aen_queue, PRIBIO | PCATCH, "tweaen", 0);
592 case TWEIO_GET_PARAM:
593 if ((param = twe_get_param(sc, tp->tp_table_id, tp->tp_param_id, tp->tp_size, NULL)) == NULL) {
594 twe_printf(sc, "TWEIO_GET_PARAM failed for 0x%x/0x%x/%d\n",
595 tp->tp_table_id, tp->tp_param_id, tp->tp_size);
598 if (param->parameter_size_bytes > tp->tp_size) {
599 twe_printf(sc, "TWEIO_GET_PARAM parameter too large (%d > %d)\n",
600 param->parameter_size_bytes, tp->tp_size);
603 error = copyout(param->data, tp->tp_data, param->parameter_size_bytes);
605 free(param, M_DEVBUF);
609 case TWEIO_SET_PARAM:
610 if ((data = malloc(tp->tp_size, M_DEVBUF, M_WAITOK)) == NULL) {
613 error = copyin(tp->tp_data, data, tp->tp_size);
615 error = twe_set_param(sc, tp->tp_table_id, tp->tp_param_id, tp->tp_size, data);
616 free(data, M_DEVBUF);
625 error = twe_add_unit(sc, td->td_unit);
629 error = twe_del_unit(sc, td->td_unit);
632 /* XXX implement ATA PASSTHROUGH */
634 /* nothing we understand */
642 /********************************************************************************
643 * Enable the useful interrupts from the controller.
646 twe_enable_interrupts(struct twe_softc *sc)
648 sc->twe_state |= TWE_STATE_INTEN;
650 TWE_CONTROL_CLEAR_ATTENTION_INTERRUPT |
651 TWE_CONTROL_UNMASK_RESPONSE_INTERRUPT |
652 TWE_CONTROL_ENABLE_INTERRUPTS);
655 /********************************************************************************
656 * Disable interrupts from the controller.
659 twe_disable_interrupts(struct twe_softc *sc)
661 TWE_CONTROL(sc, TWE_CONTROL_DISABLE_INTERRUPTS);
662 sc->twe_state &= ~TWE_STATE_INTEN;
665 /********************************************************************************
666 ********************************************************************************
668 ********************************************************************************
669 ********************************************************************************/
671 /********************************************************************************
672 * Read integer parameter table entries.
675 twe_get_param_1(struct twe_softc *sc, int table_id, int param_id, u_int8_t *result)
679 if ((param = twe_get_param(sc, table_id, param_id, 1, NULL)) == NULL)
681 *result = *(u_int8_t *)param->data;
682 free(param, M_DEVBUF);
687 twe_get_param_2(struct twe_softc *sc, int table_id, int param_id, u_int16_t *result)
691 if ((param = twe_get_param(sc, table_id, param_id, 2, NULL)) == NULL)
693 *result = *(u_int16_t *)param->data;
694 free(param, M_DEVBUF);
699 twe_get_param_4(struct twe_softc *sc, int table_id, int param_id, u_int32_t *result)
703 if ((param = twe_get_param(sc, table_id, param_id, 4, NULL)) == NULL)
705 *result = *(u_int32_t *)param->data;
706 free(param, M_DEVBUF);
710 /********************************************************************************
711 * Perform a TWE_OP_GET_PARAM command. If a callback function is provided, it
712 * will be called with the command when it's completed. If no callback is
713 * provided, we will wait for the command to complete and then return just the data.
714 * The caller is responsible for freeing the data when done with it.
717 twe_get_param(struct twe_softc *sc, int table_id, int param_id, size_t param_size,
718 void (* func)(struct twe_request *tr))
720 struct twe_request *tr;
731 if (twe_get_request(sc, &tr))
735 if ((param = (TWE_Param *)malloc(TWE_SECTOR_SIZE, M_DEVBUF, M_NOWAIT)) == NULL)
738 tr->tr_length = TWE_SECTOR_SIZE;
739 tr->tr_flags = TWE_CMD_DATAIN | TWE_CMD_DATAOUT;
741 /* build the command for the controller */
742 cmd = TWE_FIND_COMMAND(tr);
743 cmd->param.opcode = TWE_OP_GET_PARAM;
746 cmd->param.param_count = 1;
748 /* fill in the outbound parameter data */
749 param->table_id = table_id;
750 param->parameter_id = param_id;
751 param->parameter_size_bytes = param_size;
753 /* submit the command and either wait or let the callback handle it */
755 /* XXX could use twe_wait_request here if interrupts were enabled? */
756 error = twe_immediate_request(tr, 1 /* usetmp */);
758 if (twe_report_request(tr))
763 twe_release_request(tr);
766 tr->tr_complete = func;
767 error = twe_map_request(tr);
768 if ((error == 0) || (error == EBUSY))
772 /* something failed */
776 twe_release_request(tr);
778 free(param, M_DEVBUF);
782 /********************************************************************************
783 * Set integer parameter table entries.
785 #ifdef TWE_SHUTDOWN_NOTIFICATION
787 twe_set_param_1(struct twe_softc *sc, int table_id, int param_id, u_int8_t value)
789 return(twe_set_param(sc, table_id, param_id, sizeof(value), &value));
795 twe_set_param_2(struct twe_softc *sc, int table_id, int param_id, u_int16_t value)
797 return(twe_set_param(sc, table_id, param_id, sizeof(value), &value));
801 twe_set_param_4(struct twe_softc *sc, int table_id, int param_id, u_int32_t value)
803 return(twe_set_param(sc, table_id, param_id, sizeof(value), &value));
807 /********************************************************************************
808 * Perform a TWE_OP_SET_PARAM command, returns nonzero on error.
811 twe_set_param(struct twe_softc *sc, int table_id, int param_id, int param_size, void *data)
813 struct twe_request *tr;
825 if (twe_get_request(sc, &tr))
829 if ((param = (TWE_Param *)malloc(TWE_SECTOR_SIZE, M_DEVBUF, M_NOWAIT)) == NULL)
832 tr->tr_length = TWE_SECTOR_SIZE;
833 tr->tr_flags = TWE_CMD_DATAIN | TWE_CMD_DATAOUT;
835 /* build the command for the controller */
836 cmd = TWE_FIND_COMMAND(tr);
837 cmd->param.opcode = TWE_OP_SET_PARAM;
840 cmd->param.param_count = 1;
842 /* fill in the outbound parameter data */
843 param->table_id = table_id;
844 param->parameter_id = param_id;
845 param->parameter_size_bytes = param_size;
846 bcopy(data, param->data, param_size);
848 /* XXX could use twe_wait_request here if interrupts were enabled? */
849 error = twe_immediate_request(tr, 1 /* usetmp */);
851 if (twe_report_request(tr))
857 twe_release_request(tr);
859 free(param, M_DEVBUF);
863 /********************************************************************************
864 * Perform a TWE_OP_INIT_CONNECTION command, returns nonzero on error.
866 * Typically called with interrupts disabled.
869 twe_init_connection(struct twe_softc *sc, int mode)
871 struct twe_request *tr;
878 if (twe_get_request(sc, &tr))
881 /* build the command */
882 cmd = TWE_FIND_COMMAND(tr);
883 cmd->initconnection.opcode = TWE_OP_INIT_CONNECTION;
884 cmd->initconnection.size = 3;
885 cmd->initconnection.host_id = 0;
886 cmd->initconnection.message_credits = mode;
887 cmd->initconnection.response_queue_pointer = 0;
889 /* submit the command */
890 error = twe_immediate_request(tr, 0 /* usetmp */);
891 twe_release_request(tr);
893 if (mode == TWE_INIT_MESSAGE_CREDITS)
894 sc->twe_host_id = cmd->initconnection.host_id;
898 /********************************************************************************
899 * Start the command (tr) and sleep waiting for it to complete.
901 * Successfully completed commands are dequeued.
904 twe_wait_request(struct twe_request *tr)
910 tr->tr_flags |= TWE_CMD_SLEEPER;
911 tr->tr_status = TWE_CMD_BUSY;
912 twe_enqueue_ready(tr);
913 twe_startio(tr->tr_sc);
915 while (tr->tr_status == TWE_CMD_BUSY)
916 tsleep(tr, PRIBIO, "twewait", 0);
919 return(tr->tr_status != TWE_CMD_COMPLETE);
922 /********************************************************************************
923 * Start the command (tr) and busy-wait for it to complete.
924 * This should only be used when interrupts are actually disabled (although it
925 * will work if they are not).
928 twe_immediate_request(struct twe_request *tr, int usetmp)
930 struct twe_softc *sc;
938 if (usetmp && (tr->tr_data != NULL)) {
939 tr->tr_flags |= TWE_CMD_IMMEDIATE;
940 if (tr->tr_length > MAXBSIZE)
942 bcopy(tr->tr_data, sc->twe_immediate, tr->tr_length);
944 tr->tr_status = TWE_CMD_BUSY;
945 if ((error = twe_map_request(tr)) != 0)
949 /* Wait up to 5 seconds for the command to complete */
950 while ((count++ < 5000) && (tr->tr_status == TWE_CMD_BUSY)){
954 if (usetmp && (tr->tr_data != NULL))
955 bcopy(sc->twe_immediate, tr->tr_data, tr->tr_length);
957 return(tr->tr_status != TWE_CMD_COMPLETE);
960 /********************************************************************************
961 * Handle completion of an I/O command.
964 twe_completeio(struct twe_request *tr)
966 TWE_Command *cmd = TWE_FIND_COMMAND(tr);
967 struct twe_softc *sc = tr->tr_sc;
968 twe_bio *bp = (twe_bio *)tr->tr_private;
972 if (tr->tr_status == TWE_CMD_COMPLETE) {
974 if (cmd->generic.status)
975 if (twe_report_request(tr))
976 TWE_BIO_SET_ERROR(bp, EIO);
979 twe_panic(sc, "twe_completeio on incomplete command");
981 tr->tr_private = NULL;
983 twe_release_request(tr);
986 /********************************************************************************
987 * Reset the controller and pull all the active commands back onto the ready
988 * queue. Used to restart a controller that's exhibiting bad behaviour.
991 twe_reset(struct twe_softc *sc)
993 struct twe_request *tr;
997 * Sleep for a short period to allow AENs to be signalled.
999 tsleep(sc, PRIBIO, "twereset", hz);
1002 * Disable interrupts from the controller, and mask any accidental entry
1003 * into our interrupt handler.
1005 twe_printf(sc, "controller reset in progress...\n");
1006 twe_disable_interrupts(sc);
1010 * Try to soft-reset the controller.
1012 for (i = 0; i < TWE_MAX_RESET_TRIES; i++) {
1015 twe_printf(sc, "reset %d failed, trying again\n", i);
1017 if (!twe_soft_reset(sc))
1018 break; /* reset process complete */
1020 /* did we give up? */
1021 if (i >= TWE_MAX_RESET_TRIES) {
1022 twe_printf(sc, "can't reset controller, giving up\n");
1027 * Move all of the commands that were busy back to the ready queue.
1030 while ((tr = twe_dequeue_busy(sc)) != NULL) {
1031 twe_enqueue_ready(tr);
1036 * Kick the controller to start things going again, then re-enable interrupts.
1039 twe_enable_interrupts(sc);
1040 twe_printf(sc, "controller reset done, %d commands restarted\n", i);
1044 twe_enable_interrupts(sc);
1047 /********************************************************************************
1048 ********************************************************************************
1049 Command I/O to Controller
1050 ********************************************************************************
1051 ********************************************************************************/
1053 /********************************************************************************
1054 * Try to deliver (tr) to the controller.
1056 * Can be called at any interrupt level, with or without interrupts enabled.
1059 twe_start(struct twe_request *tr)
1061 struct twe_softc *sc = tr->tr_sc;
1064 u_int32_t status_reg;
1068 /* mark the command as currently being processed */
1069 tr->tr_status = TWE_CMD_BUSY;
1070 cmd = TWE_FIND_COMMAND(tr);
1073 * Spin briefly waiting for the controller to come ready
1075 * XXX it might be more efficient to return EBUSY immediately
1076 * and let the command be rescheduled.
1078 for (i = 100000, done = 0; (i > 0) && !done; i--) {
1081 /* check to see if we can post a command */
1082 status_reg = TWE_STATUS(sc);
1083 twe_check_bits(sc, status_reg);
1085 if (!(status_reg & TWE_STATUS_COMMAND_QUEUE_FULL)) {
1086 twe_enqueue_busy(tr);
1088 TWE_COMMAND_QUEUE(sc, TWE_FIND_COMMANDPHYS(tr));
1090 /* move command to work queue */
1092 if (tr->tr_complete != NULL) {
1093 debug(3, "queued request %d with callback %p", cmd->generic.request_id, tr->tr_complete);
1094 } else if (tr->tr_flags & TWE_CMD_SLEEPER) {
1095 debug(3, "queued request %d with wait channel %p", cmd->generic.request_id, tr);
1097 debug(3, "queued request %d for polling caller", cmd->generic.request_id);
1101 splx(s); /* drop spl to allow completion interrupts */
1104 /* command is enqueued */
1109 * We couldn't get the controller to take the command; try submitting it again later.
1110 * This should only happen if something is wrong with the controller, or if we have
1111 * overestimated the number of commands it can accept. (Should we actually reject
1112 * the command at this point?)
1117 /********************************************************************************
1118 * Poll the controller (sc) for completed commands.
1120 * Can be called at any interrupt level, with or without interrupts enabled.
1123 twe_done(struct twe_softc *sc)
1125 TWE_Response_Queue rq;
1127 struct twe_request *tr;
1129 u_int32_t status_reg;
1133 /* loop collecting completed commands */
1137 status_reg = TWE_STATUS(sc);
1138 twe_check_bits(sc, status_reg); /* XXX should this fail? */
1140 if (!(status_reg & TWE_STATUS_RESPONSE_QUEUE_EMPTY)) {
1142 rq = TWE_RESPONSE_QUEUE(sc);
1143 tr = sc->twe_lookup[rq.u.response_id]; /* find command */
1144 cmd = TWE_FIND_COMMAND(tr);
1145 if (tr->tr_status != TWE_CMD_BUSY)
1146 twe_printf(sc, "completion event for nonbusy command\n");
1147 tr->tr_status = TWE_CMD_COMPLETE;
1148 debug(3, "completed request id %d with status %d",
1149 cmd->generic.request_id, cmd->generic.status);
1150 /* move to completed queue */
1151 twe_remove_busy(tr);
1152 twe_enqueue_complete(tr);
1153 sc->twe_state &= ~TWE_STATE_CTLR_BUSY;
1155 break; /* no response ready */
1160 /* if we've completed any commands, try posting some more */
1164 /* handle completion and timeouts */
1165 twe_complete(sc); /* XXX use deferred completion? */
1168 /********************************************************************************
1169 * Perform post-completion processing for commands on (sc).
1171 * This is split from twe_done as it can be safely deferred and run at a lower
1172 * priority level should facilities for such a thing become available.
1175 twe_complete(struct twe_softc *sc)
1177 struct twe_request *tr;
1182 * Pull commands off the completed list, dispatch them appropriately
1184 while ((tr = twe_dequeue_complete(sc)) != NULL) {
1185 /* unmap the command's data buffer */
1186 twe_unmap_request(tr);
1188 /* dispatch to suit command originator */
1189 if (tr->tr_complete != NULL) { /* completion callback */
1190 debug(2, "call completion handler %p", tr->tr_complete);
1191 tr->tr_complete(tr);
1193 } else if (tr->tr_flags & TWE_CMD_SLEEPER) { /* caller is asleep waiting */
1194 debug(2, "wake up command owner on %p", tr);
1197 } else { /* caller is polling command */
1198 debug(2, "command left for owner");
1203 /********************************************************************************
1204 * Wait for (status) to be set in the controller status register for up to
1205 * (timeout) seconds. Returns 0 if found, nonzero if we time out.
1207 * Note: this busy-waits, rather than sleeping, since we may be called with
1208 * eg. clock interrupts masked.
1211 twe_wait_status(struct twe_softc *sc, u_int32_t status, int timeout)
1214 u_int32_t status_reg;
1218 expiry = time_second + timeout;
1221 status_reg = TWE_STATUS(sc);
1222 if (status_reg & status) /* got the required bit(s)? */
1225 } while (time_second <= expiry);
1230 /********************************************************************************
1231 * Drain the response queue, which may contain responses to commands we know
1235 twe_drain_response_queue(struct twe_softc *sc)
1237 TWE_Response_Queue rq;
1238 u_int32_t status_reg;
1242 for (;;) { /* XXX give up eventually? */
1243 status_reg = TWE_STATUS(sc);
1244 if (twe_check_bits(sc, status_reg))
1246 if (status_reg & TWE_STATUS_RESPONSE_QUEUE_EMPTY)
1248 rq = TWE_RESPONSE_QUEUE(sc);
1252 /********************************************************************************
1253 * Soft-reset the controller
1256 twe_soft_reset(struct twe_softc *sc)
1258 u_int32_t status_reg;
1264 if (twe_wait_status(sc, TWE_STATUS_ATTENTION_INTERRUPT, 30)) {
1265 twe_printf(sc, "no attention interrupt\n");
1268 TWE_CONTROL(sc, TWE_CONTROL_CLEAR_ATTENTION_INTERRUPT);
1269 if (twe_drain_aen_queue(sc)) {
1270 twe_printf(sc, "can't drain AEN queue\n");
1273 if (twe_find_aen(sc, TWE_AEN_SOFT_RESET)) {
1274 twe_printf(sc, "reset not reported\n");
1277 status_reg = TWE_STATUS(sc);
1278 if (TWE_STATUS_ERRORS(status_reg) || twe_check_bits(sc, status_reg)) {
1279 twe_printf(sc, "controller errors detected\n");
1282 if (twe_drain_response_queue(sc)) {
1283 twe_printf(sc, "can't drain response queue\n");
1289 /********************************************************************************
1290 ********************************************************************************
1292 ********************************************************************************
1293 ********************************************************************************/
1295 /********************************************************************************
1298 * XXX what does this mean?
1301 twe_host_intr(struct twe_softc *sc)
1305 twe_printf(sc, "host interrupt\n");
1306 TWE_CONTROL(sc, TWE_CONTROL_CLEAR_HOST_INTERRUPT);
1309 /********************************************************************************
1310 * Attention interrupt.
1312 * Signalled when the controller has one or more AENs for us.
1315 twe_attention_intr(struct twe_softc *sc)
1319 /* instigate a poll for AENs */
1320 if (twe_fetch_aen(sc)) {
1321 twe_printf(sc, "error polling for signalled AEN\n");
1323 TWE_CONTROL(sc, TWE_CONTROL_CLEAR_ATTENTION_INTERRUPT);
1327 /********************************************************************************
1328 * Command interrupt.
1330 * Signalled when the controller can handle more commands.
1333 twe_command_intr(struct twe_softc *sc)
1338 * We don't use this, rather we try to submit commands when we receive
1339 * them, and when other commands have completed. Mask it so we don't get
1342 TWE_CONTROL(sc, TWE_CONTROL_MASK_COMMAND_INTERRUPT);
1345 /********************************************************************************
1346 ********************************************************************************
1347 Asynchronous Event Handling
1348 ********************************************************************************
1349 ********************************************************************************/
1351 /********************************************************************************
1352 * Request an AEN from the controller.
1355 twe_fetch_aen(struct twe_softc *sc)
1360 if ((twe_get_param(sc, TWE_PARAM_AEN, TWE_PARAM_AEN_UnitCode, 2, twe_handle_aen)) == NULL)
1365 /********************************************************************************
1366 * Handle an AEN returned by the controller.
1369 twe_handle_aen(struct twe_request *tr)
1371 struct twe_softc *sc = tr->tr_sc;
1377 /* XXX check for command success somehow? */
1379 param = (TWE_Param *)tr->tr_data;
1380 aen = *(u_int16_t *)(param->data);
1382 free(tr->tr_data, M_DEVBUF);
1383 twe_release_request(tr);
1384 twe_enqueue_aen(sc, aen);
1386 /* XXX poll for more AENs? */
1389 /********************************************************************************
1390 * Pull AENs out of the controller and park them in the queue, in a context where
1391 * interrupts aren't active. Return nonzero if we encounter any errors in the
1392 * process of obtaining all the available AENs.
1395 twe_drain_aen_queue(struct twe_softc *sc)
1400 if (twe_get_param_2(sc, TWE_PARAM_AEN, TWE_PARAM_AEN_UnitCode, &aen))
1402 if (aen == TWE_AEN_QUEUE_EMPTY)
1404 twe_enqueue_aen(sc, aen);
1408 /********************************************************************************
1409 * Push an AEN that we've received onto the queue.
1411 * Note that we have to lock this against reentrance, since it may be called
1412 * from both interrupt and non-interrupt context.
1414 * If someone is waiting for the AEN we have, wake them up.
1417 twe_enqueue_aen(struct twe_softc *sc, u_int16_t aen)
1420 int s, next, nextnext;
1424 if ((msg = twe_format_aen(sc, aen)) != NULL)
1425 twe_printf(sc, "AEN: <%s>\n", msg);
1428 /* enqueue the AEN */
1429 next = ((sc->twe_aen_head + 1) % TWE_Q_LENGTH);
1430 nextnext = ((sc->twe_aen_head + 2) % TWE_Q_LENGTH);
1432 /* check to see if this is the last free slot, and subvert the AEN if it is */
1433 if (nextnext == sc->twe_aen_tail)
1434 aen = TWE_AEN_QUEUE_FULL;
1436 /* look to see if there's room for this AEN */
1437 if (next != sc->twe_aen_tail) {
1438 sc->twe_aen_queue[sc->twe_aen_head] = aen;
1439 sc->twe_aen_head = next;
1442 /* wake up anyone asleep on the queue */
1443 wakeup(&sc->twe_aen_queue);
1445 /* anyone looking for this AEN? */
1446 if (sc->twe_wait_aen == aen) {
1447 sc->twe_wait_aen = -1;
1448 wakeup(&sc->twe_wait_aen);
1453 /********************************************************************************
1454 * Pop an AEN off the queue, or return -1 if there are none left.
1456 * We are more or less interrupt-safe, so don't block interrupts.
1459 twe_dequeue_aen(struct twe_softc *sc)
1465 if (sc->twe_aen_tail == sc->twe_aen_head) {
1466 result = TWE_AEN_QUEUE_EMPTY;
1468 result = sc->twe_aen_queue[sc->twe_aen_tail];
1469 sc->twe_aen_tail = ((sc->twe_aen_tail + 1) % TWE_Q_LENGTH);
1474 /********************************************************************************
1475 * Check to see if the requested AEN is in the queue.
1477 * XXX we could probably avoid masking interrupts here
1480 twe_find_aen(struct twe_softc *sc, u_int16_t aen)
1486 for (i = sc->twe_aen_tail; (i != sc->twe_aen_head) && missing; i = (i + 1) % TWE_Q_LENGTH) {
1487 if (sc->twe_aen_queue[i] == aen)
1495 #if 0 /* currently unused */
1496 /********************************************************************************
1497 * Sleep waiting for at least (timeout) seconds until we see (aen) as
1498 * requested. Returns nonzero on timeout or failure.
1500 * XXX: this should not be used in cases where there may be more than one sleeper
1501 * without a mechanism for registering multiple sleepers.
1504 twe_wait_aen(struct twe_softc *sc, int aen, int timeout)
1511 expiry = time_second + timeout;
1515 sc->twe_wait_aen = aen;
1518 tsleep(&sc->twe_wait_aen, PZERO, "twewaen", hz);
1519 if (sc->twe_wait_aen == -1)
1521 } while ((time_second <= expiry) && !found);
1527 /********************************************************************************
1528 ********************************************************************************
1529 Command Buffer Management
1530 ********************************************************************************
1531 ********************************************************************************/
1533 /********************************************************************************
1534 * Get a new command buffer.
1536 * This will return NULL if all command buffers are in use.
1539 twe_get_request(struct twe_softc *sc, struct twe_request **tr)
1544 /* try to reuse an old buffer */
1545 *tr = twe_dequeue_free(sc);
1547 /* initialise some fields to their defaults */
1549 cmd = TWE_FIND_COMMAND(*tr);
1550 (*tr)->tr_data = NULL;
1551 (*tr)->tr_private = NULL;
1552 (*tr)->tr_status = TWE_CMD_SETUP; /* command is in setup phase */
1553 (*tr)->tr_flags = 0;
1554 (*tr)->tr_complete = NULL;
1555 cmd->generic.status = 0; /* before submission to controller */
1556 cmd->generic.flags = 0; /* not used */
1558 return(*tr == NULL);
1561 /********************************************************************************
1562 * Release a command buffer for reuse.
1566 twe_release_request(struct twe_request *tr)
1570 if (tr->tr_private != NULL)
1571 twe_panic(tr->tr_sc, "tr_private != NULL");
1572 twe_enqueue_free(tr);
1575 /********************************************************************************
1576 ********************************************************************************
1578 ********************************************************************************
1579 ********************************************************************************/
1581 /********************************************************************************
1582 * Print some information about the controller
1585 twe_describe_controller(struct twe_softc *sc)
1594 /* get the port count */
1595 twe_get_param_1(sc, TWE_PARAM_CONTROLLER, TWE_PARAM_CONTROLLER_PortCount, &ports);
1597 /* get version strings */
1598 p[0] = twe_get_param(sc, TWE_PARAM_VERSION, TWE_PARAM_VERSION_FW, 16, NULL);
1599 p[1] = twe_get_param(sc, TWE_PARAM_VERSION, TWE_PARAM_VERSION_BIOS, 16, NULL);
1601 twe_printf(sc, "%d ports, Firmware %.16s, BIOS %.16s\n", ports, p[0]->data, p[1]->data);
1604 p[2] = twe_get_param(sc, TWE_PARAM_VERSION, TWE_PARAM_VERSION_Mon, 16, NULL);
1605 p[3] = twe_get_param(sc, TWE_PARAM_VERSION, TWE_PARAM_VERSION_PCB, 8, NULL);
1606 p[4] = twe_get_param(sc, TWE_PARAM_VERSION, TWE_PARAM_VERSION_ATA, 8, NULL);
1607 p[5] = twe_get_param(sc, TWE_PARAM_VERSION, TWE_PARAM_VERSION_PCI, 8, NULL);
1609 if (p[2] && p[3] && p[4] && p[5])
1610 twe_printf(sc, "Monitor %.16s, PCB %.8s, Achip %.8s, Pchip %.8s\n", p[2]->data, p[3]->data,
1611 p[4]->data, p[5]->data);
1613 free(p[2], M_DEVBUF);
1615 free(p[3], M_DEVBUF);
1617 free(p[4], M_DEVBUF);
1619 free(p[5], M_DEVBUF);
1622 free(p[0], M_DEVBUF);
1624 free(p[1], M_DEVBUF);
1626 /* print attached drives */
1628 p[0] = twe_get_param(sc, TWE_PARAM_DRIVESUMMARY, TWE_PARAM_DRIVESUMMARY_Status, 16, NULL);
1629 for (i = 0; i < ports; i++) {
1630 if (p[0]->data[i] != TWE_PARAM_DRIVESTATUS_Present)
1632 twe_get_param_4(sc, TWE_PARAM_DRIVEINFO + i, TWE_PARAM_DRIVEINFO_Size, &size);
1633 p[1] = twe_get_param(sc, TWE_PARAM_DRIVEINFO + i, TWE_PARAM_DRIVEINFO_Model, 40, NULL);
1635 twe_printf(sc, "port %d: %.40s %dMB\n", i, p[1]->data, size / 2048);
1636 free(p[1], M_DEVBUF);
1638 twe_printf(sc, "port %d, drive status unavailable\n", i);
1642 free(p[0], M_DEVBUF);
1646 /********************************************************************************
1647 * Look up a text description of a numeric code and return a pointer to same.
1650 twe_describe_code(struct twe_code_lookup *table, u_int32_t code)
1654 for (i = 0; table[i].string != NULL; i++)
1655 if (table[i].code == code)
1656 return(table[i].string);
1657 return(table[i+1].string);
1660 /********************************************************************************
1661 * Complain if the status bits aren't what we're expecting.
1663 * Rate-limit the complaints to at most one of each every five seconds, but
1664 * always return the correct status.
1667 twe_check_bits(struct twe_softc *sc, u_int32_t status_reg)
1670 static time_t lastwarn[2] = {0, 0};
1673 * This can be a little problematic, as twe_panic may call twe_reset if
1674 * TWE_DEBUG is not set, which will call us again as part of the soft reset.
1676 if ((status_reg & TWE_STATUS_PANIC_BITS) != 0) {
1677 twe_printf(sc, "FATAL STATUS BIT(S) %b\n", status_reg & TWE_STATUS_PANIC_BITS,
1678 TWE_STATUS_BITS_DESCRIPTION);
1679 twe_panic(sc, "fatal status bits");
1683 if ((status_reg & TWE_STATUS_EXPECTED_BITS) != TWE_STATUS_EXPECTED_BITS) {
1684 if (time_second > (lastwarn[0] + 5)) {
1685 twe_printf(sc, "missing expected status bit(s) %b\n", ~status_reg & TWE_STATUS_EXPECTED_BITS,
1686 TWE_STATUS_BITS_DESCRIPTION);
1687 lastwarn[0] = time_second;
1692 if ((status_reg & TWE_STATUS_UNEXPECTED_BITS) != 0) {
1693 if (time_second > (lastwarn[1] + 5)) {
1694 twe_printf(sc, "unexpected status bit(s) %b\n", status_reg & TWE_STATUS_UNEXPECTED_BITS,
1695 TWE_STATUS_BITS_DESCRIPTION);
1696 lastwarn[1] = time_second;
1699 if (status_reg & TWE_STATUS_PCI_PARITY_ERROR) {
1700 twe_printf(sc, "PCI parity error: Reseat card, move card or buggy device present.\n");
1701 twe_clear_pci_parity_error(sc);
1703 if (status_reg & TWE_STATUS_PCI_ABORT) {
1704 twe_printf(sc, "PCI abort, clearing.\n");
1705 twe_clear_pci_abort(sc);
1712 /********************************************************************************
1713 * Return a string describing (aen).
1715 * The low 8 bits of the aen are the code, the high 8 bits give the unit number
1716 * where an AEN is specific to a unit.
1718 * Note that we could expand this routine to handle eg. up/downgrading the status
1719 * of a drive if we had some idea of what the drive's initial status was.
1723 twe_format_aen(struct twe_softc *sc, u_int16_t aen)
1725 static char buf[80];
1729 code = twe_describe_code(twe_table_aen, TWE_AEN_CODE(aen));
1741 if ((child = sc->twe_drive[TWE_AEN_UNIT(aen)].td_disk) != NULL) {
1742 sprintf(buf, "twed%d: %s", device_get_unit(child), msg);
1744 sprintf(buf, "twe%d: %s for unknown unit %d", device_get_unit(sc->twe_dev),
1745 msg, TWE_AEN_UNIT(aen));
1750 sprintf(buf, "twe%d: port %d: %s", device_get_unit(sc->twe_dev), TWE_AEN_UNIT(aen),
1759 sprintf(buf, "unknown AEN 0x%x", aen);
1763 /********************************************************************************
1764 * Print a diagnostic if the status of the command warrants it, and return
1765 * either zero (command was ok) or nonzero (command failed).
1768 twe_report_request(struct twe_request *tr)
1770 struct twe_softc *sc = tr->tr_sc;
1771 TWE_Command *cmd = TWE_FIND_COMMAND(tr);
1775 * Check the command status value and handle accordingly.
1777 if (cmd->generic.status == TWE_STATUS_RESET) {
1779 * The status code 0xff requests a controller reset.
1781 twe_printf(sc, "command returned with controller reset request\n");
1784 } else if (cmd->generic.status > TWE_STATUS_FATAL) {
1786 * Fatal errors that don't require controller reset.
1788 * We know a few special flags values.
1790 switch (cmd->generic.flags) {
1792 device_printf(sc->twe_drive[cmd->generic.unit].td_disk,
1796 device_printf(sc->twe_drive[cmd->generic.unit].td_disk,
1797 "unrecoverable drive error");
1800 device_printf(sc->twe_drive[cmd->generic.unit].td_disk,
1801 "controller error - %s (flags = 0x%x)\n",
1802 twe_describe_code(twe_table_status, cmd->generic.status),
1803 cmd->generic.flags);
1806 } else if (cmd->generic.status > TWE_STATUS_WARNING) {
1808 * Warning level status.
1810 device_printf(sc->twe_drive[cmd->generic.unit].td_disk,
1811 "warning - %s (flags = 0x%x)\n",
1812 twe_describe_code(twe_table_status, cmd->generic.status),
1813 cmd->generic.flags);
1814 } else if (cmd->generic.status > 0x40) {
1816 * Info level status.
1818 device_printf(sc->twe_drive[cmd->generic.unit].td_disk,
1819 "attention - %s (flags = 0x%x)\n",
1820 twe_describe_code(twe_table_status, cmd->generic.status),
1821 cmd->generic.flags);
1827 /********************************************************************************
1828 * Print some controller state to aid in debugging error/panic conditions
1831 twe_print_controller(struct twe_softc *sc)
1833 u_int32_t status_reg;
1835 status_reg = TWE_STATUS(sc);
1836 twe_printf(sc, "status %b\n", status_reg, TWE_STATUS_BITS_DESCRIPTION);
1837 twe_printf(sc, " current max min\n");
1838 twe_printf(sc, "free %04d %04d %04d\n",
1839 sc->twe_qstat[TWEQ_FREE].q_length, sc->twe_qstat[TWEQ_FREE].q_max, sc->twe_qstat[TWEQ_FREE].q_min);
1841 twe_printf(sc, "ready %04d %04d %04d\n",
1842 sc->twe_qstat[TWEQ_READY].q_length, sc->twe_qstat[TWEQ_READY].q_max, sc->twe_qstat[TWEQ_READY].q_min);
1844 twe_printf(sc, "busy %04d %04d %04d\n",
1845 sc->twe_qstat[TWEQ_BUSY].q_length, sc->twe_qstat[TWEQ_BUSY].q_max, sc->twe_qstat[TWEQ_BUSY].q_min);
1847 twe_printf(sc, "complete %04d %04d %04d\n",
1848 sc->twe_qstat[TWEQ_COMPLETE].q_length, sc->twe_qstat[TWEQ_COMPLETE].q_max, sc->twe_qstat[TWEQ_COMPLETE].q_min);
1850 twe_printf(sc, "bioq %04d %04d %04d\n",
1851 sc->twe_qstat[TWEQ_BIO].q_length, sc->twe_qstat[TWEQ_BIO].q_max, sc->twe_qstat[TWEQ_BIO].q_min);
1853 twe_printf(sc, "AEN queue head %d tail %d\n", sc->twe_aen_head, sc->twe_aen_tail);
1857 twe_panic(struct twe_softc *sc, char *reason)
1859 twe_print_controller(sc);
1868 /********************************************************************************
1869 * Print a request/command in human-readable format.
1872 twe_print_request(struct twe_request *tr)
1874 struct twe_softc *sc = tr->tr_sc;
1875 TWE_Command *cmd = TWE_FIND_COMMAND(tr);
1878 twe_printf(sc, "CMD: request_id %d opcode <%s> size %d unit %d host_id %d\n",
1879 cmd->generic.request_id, twe_describe_code(twe_table_opcode, cmd->generic.opcode), cmd->generic.size,
1880 cmd->generic.unit, cmd->generic.host_id);
1881 twe_printf(sc, " status %d flags 0x%x count %d sgl_offset %d\n",
1882 cmd->generic.status, cmd->generic.flags, cmd->generic.count, cmd->generic.sgl_offset);
1884 switch(cmd->generic.opcode) { /* XXX add more opcodes? */
1887 twe_printf(sc, " lba %d\n", cmd->io.lba);
1888 for (i = 0; (i < TWE_MAX_SGL_LENGTH) && (cmd->io.sgl[i].length != 0); i++)
1889 twe_printf(sc, " %d: 0x%x/%d\n",
1890 i, cmd->io.sgl[i].address, cmd->io.sgl[i].length);
1893 case TWE_OP_GET_PARAM:
1894 case TWE_OP_SET_PARAM:
1895 for (i = 0; (i < TWE_MAX_SGL_LENGTH) && (cmd->param.sgl[i].length != 0); i++)
1896 twe_printf(sc, " %d: 0x%x/%d\n",
1897 i, cmd->param.sgl[i].address, cmd->param.sgl[i].length);
1900 case TWE_OP_INIT_CONNECTION:
1901 twe_printf(sc, " response queue pointer 0x%x\n",
1902 cmd->initconnection.response_queue_pointer);
1908 twe_printf(sc, " tr_command %p/0x%x tr_data %p/0x%x,%d\n",
1909 tr, TWE_FIND_COMMANDPHYS(tr), tr->tr_data, tr->tr_dataphys, tr->tr_length);
1910 twe_printf(sc, " tr_status %d tr_flags 0x%x tr_complete %p tr_private %p\n",
1911 tr->tr_status, tr->tr_flags, tr->tr_complete, tr->tr_private);