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 1.30 2009/12/25 17:34:43 mav Exp $
33 * Driver for the 3ware Escalade family of IDE RAID controllers.
36 #include <dev/raid/twe/twe_compat.h>
37 #include <dev/raid/twe/twereg.h>
38 #include <dev/raid/twe/tweio.h>
39 #include <dev/raid/twe/twevar.h>
40 #define TWE_DEFINE_TABLES
41 #include <dev/raid/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;
250 /* build synthetic geometry as per controller internal rules */
251 if (dr->td_size > 0x200000) {
258 dr->td_cylinders = dr->td_size / (dr->td_heads * dr->td_sectors);
259 dr->td_twe_unit = unit;
261 error = twe_attach_drive(sc, dr);
265 kfree(param, M_DEVBUF);
267 kfree(drives, M_DEVBUF);
272 twe_del_unit(struct twe_softc *sc, int unit)
276 if (unit < 0 || unit >= TWE_MAX_UNITS)
279 if (sc->twe_drive[unit].td_disk == NULL)
282 error = twe_detach_drive(sc, unit);
286 /********************************************************************************
287 * Locate disk devices and attach children to them.
290 twe_init(struct twe_softc *sc)
297 for (i = 0; i < TWE_MAX_UNITS; i++)
301 * Initialise connection with controller.
303 twe_init_connection(sc, TWE_INIT_MESSAGE_CREDITS);
305 #ifdef TWE_SHUTDOWN_NOTIFICATION
307 * Tell the controller we support shutdown notification.
309 twe_set_param_1(sc, TWE_PARAM_FEATURES, TWE_PARAM_FEATURES_DriverShutdown, 1);
313 * Mark controller up and ready to run.
315 sc->twe_state &= ~TWE_STATE_SHUTDOWN;
318 * Finally enable interrupts.
320 twe_enable_interrupts(sc);
323 /********************************************************************************
324 * Stop the controller
327 twe_deinit(struct twe_softc *sc)
330 * Mark the controller as shutting down, and disable any further interrupts.
332 sc->twe_state |= TWE_STATE_SHUTDOWN;
333 twe_disable_interrupts(sc);
335 #ifdef TWE_SHUTDOWN_NOTIFICATION
337 * Disconnect from the controller
339 twe_init_connection(sc, TWE_SHUTDOWN_MESSAGE_CREDITS);
343 /*******************************************************************************
344 * Take an interrupt, or be poked by other code to look for interrupt-worthy
348 twe_intr(struct twe_softc *sc)
350 u_int32_t status_reg;
355 * Collect current interrupt status.
357 status_reg = TWE_STATUS(sc);
358 twe_check_bits(sc, status_reg);
361 * Dispatch based on interrupt status
363 if (status_reg & TWE_STATUS_HOST_INTERRUPT)
365 if (status_reg & TWE_STATUS_ATTENTION_INTERRUPT)
366 twe_attention_intr(sc);
367 if (status_reg & TWE_STATUS_COMMAND_INTERRUPT)
368 twe_command_intr(sc);
369 if (status_reg & TWE_STATUS_RESPONSE_INTERRUPT)
373 /********************************************************************************
374 * Pull as much work off the softc's work queue as possible and give it to the
378 twe_startio(struct twe_softc *sc)
380 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 ((bio = twe_dequeue_bio(sc)) == NULL) {
406 twe_release_request(tr);
411 /* connect the bio to the command */
412 tr->tr_complete = twe_completeio;
413 tr->tr_private = bio;
414 tr->tr_data = bp->b_data;
415 tr->tr_length = bp->b_bcount;
416 cmd = TWE_FIND_COMMAND(tr);
417 if (bp->b_cmd == BUF_CMD_READ) {
418 tr->tr_flags |= TWE_CMD_DATAIN;
419 cmd->io.opcode = TWE_OP_READ;
421 tr->tr_flags |= TWE_CMD_DATAOUT;
422 cmd->io.opcode = TWE_OP_WRITE;
425 /* build a suitable I/O command (assumes 512-byte rounded transfers) */
427 cmd->io.unit = ((struct twed_softc *)bio->bio_driver_info)->twed_drive->td_twe_unit;
428 cmd->io.block_count = (tr->tr_length + TWE_BLOCK_SIZE - 1) / TWE_BLOCK_SIZE;
429 cmd->io.lba = (u_int32_t)(bio->bio_offset / TWE_BLOCK_SIZE);
430 KKASSERT(bio->bio_offset < 0x100000000ULL * TWE_BLOCK_SIZE);
433 /* did we find something to do? */
437 /* try to map and submit the command to controller */
438 error = twe_map_request(tr);
443 tr->tr_status = TWE_CMD_ERROR;
444 if (tr->tr_private != NULL) {
445 bio = (twe_bio *)tr->tr_private;
448 bp->b_flags |= B_ERROR;
449 tr->tr_private = NULL;
451 twe_release_request(tr);
452 } else if (tr->tr_flags & TWE_CMD_SLEEPER)
453 wakeup_one(tr); /* wakeup the sleeping owner */
458 /********************************************************************************
459 * Write blocks from memory to disk, for system crash dumps.
462 twe_dump_blocks(struct twe_softc *sc, int unit, u_int64_t lba, void *data, int nblks)
464 struct twe_request *tr;
468 if (twe_get_request(sc, &tr))
471 KKASSERT(lba < 0x100000000ULL);
474 tr->tr_status = TWE_CMD_SETUP;
475 tr->tr_length = nblks * TWE_BLOCK_SIZE;
476 tr->tr_flags = TWE_CMD_DATAOUT;
478 cmd = TWE_FIND_COMMAND(tr);
479 cmd->io.opcode = TWE_OP_WRITE;
482 cmd->io.block_count = nblks;
485 error = twe_immediate_request(tr, 0);
487 if (twe_report_request(tr))
489 twe_release_request(tr);
493 /********************************************************************************
494 * Handle controller-specific control operations.
497 twe_ioctl(struct twe_softc *sc, u_long ioctlcmd, void *addr)
499 struct twe_usercommand *tu = (struct twe_usercommand *)addr;
500 struct twe_paramcommand *tp = (struct twe_paramcommand *)addr;
501 struct twe_drivecommand *td = (struct twe_drivecommand *)addr;
502 union twe_statrequest *ts = (union twe_statrequest *)addr;
506 u_int16_t *aen_code = (u_int16_t *)addr;
507 struct twe_request *tr;
513 /* handle a command from userspace */
516 while (twe_get_request(sc, &tr))
517 tsleep(sc, 0, "twioctl", hz);
520 * Save the command's request ID, copy the user-supplied command in,
521 * restore the request ID.
523 cmd = TWE_FIND_COMMAND(tr);
524 srid = cmd->generic.request_id;
525 bcopy(&tu->tu_command, cmd, sizeof(TWE_Command));
526 cmd->generic.request_id = srid;
529 * if there's a data buffer, allocate and copy it in.
530 * Must be in multipled of 512 bytes.
532 tr->tr_length = (tu->tu_size + 511) & ~511;
533 if (tr->tr_length > 0) {
534 tr->tr_data = kmalloc(tr->tr_length, M_DEVBUF, M_WAITOK);
535 if ((error = copyin(tu->tu_data, tr->tr_data, tu->tu_size)) != 0)
537 tr->tr_flags |= TWE_CMD_DATAIN | TWE_CMD_DATAOUT;
540 /* run the command */
541 error = twe_wait_request(tr);
545 /* copy the command out again */
546 bcopy(cmd, &tu->tu_command, sizeof(TWE_Command));
548 /* if there was a data buffer, copy it out */
549 if (tr->tr_length > 0)
550 error = copyout(tr->tr_data, tu->tu_data, tu->tu_size);
554 if (tr->tr_data != NULL)
555 kfree(tr->tr_data, M_DEVBUF);
557 twe_release_request(tr);
561 /* fetch statistics counter */
563 switch (ts->ts_item) {
564 #ifdef TWE_PERFORMANCE_MONITOR
570 bcopy(&sc->twe_qstat[ts->ts_item], &ts->ts_qstat, sizeof(struct twe_qstat));
579 /* poll for an AEN */
581 *aen_code = twe_dequeue_aen(sc);
584 /* wait for another AEN to show up */
587 while ((*aen_code = twe_dequeue_aen(sc)) == TWE_AEN_QUEUE_EMPTY) {
588 error = tsleep(&sc->twe_aen_queue, PCATCH, "tweaen", 0);
595 case TWEIO_GET_PARAM:
596 if ((param = twe_get_param(sc, tp->tp_table_id, tp->tp_param_id, tp->tp_size, NULL)) == NULL) {
597 twe_printf(sc, "TWEIO_GET_PARAM failed for 0x%x/0x%x/%d\n",
598 tp->tp_table_id, tp->tp_param_id, tp->tp_size);
601 if (param->parameter_size_bytes > tp->tp_size) {
602 twe_printf(sc, "TWEIO_GET_PARAM parameter too large (%d > %d)\n",
603 param->parameter_size_bytes, tp->tp_size);
606 error = copyout(param->data, tp->tp_data, param->parameter_size_bytes);
608 kfree(param, M_DEVBUF);
612 case TWEIO_SET_PARAM:
613 data = kmalloc(tp->tp_size, M_DEVBUF, M_WAITOK);
614 error = copyin(tp->tp_data, data, tp->tp_size);
616 error = twe_set_param(sc, tp->tp_table_id, tp->tp_param_id, tp->tp_size, data);
617 kfree(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 kfree(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 kfree(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 kfree(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 param = (TWE_Param *)kmalloc(TWE_SECTOR_SIZE, M_DEVBUF, M_INTWAIT);
737 tr->tr_length = TWE_SECTOR_SIZE;
738 tr->tr_flags = TWE_CMD_DATAIN | TWE_CMD_DATAOUT;
740 /* build the command for the controller */
741 cmd = TWE_FIND_COMMAND(tr);
742 cmd->param.opcode = TWE_OP_GET_PARAM;
745 cmd->param.param_count = 1;
747 /* fill in the outbound parameter data */
748 param->table_id = table_id;
749 param->parameter_id = param_id;
750 param->parameter_size_bytes = param_size;
752 /* submit the command and either wait or let the callback handle it */
754 /* XXX could use twe_wait_request here if interrupts were enabled? */
755 error = twe_immediate_request(tr, 1 /* usetmp */);
757 if (twe_report_request(tr))
762 twe_release_request(tr);
765 tr->tr_complete = func;
766 error = twe_map_request(tr);
767 if ((error == 0) || (error == EBUSY))
771 /* something failed */
775 twe_release_request(tr);
777 kfree(param, M_DEVBUF);
781 /********************************************************************************
782 * Set integer parameter table entries.
784 #ifdef TWE_SHUTDOWN_NOTIFICATION
786 twe_set_param_1(struct twe_softc *sc, int table_id, int param_id, u_int8_t value)
788 return(twe_set_param(sc, table_id, param_id, sizeof(value), &value));
794 twe_set_param_2(struct twe_softc *sc, int table_id, int param_id, u_int16_t value)
796 return(twe_set_param(sc, table_id, param_id, sizeof(value), &value));
800 twe_set_param_4(struct twe_softc *sc, int table_id, int param_id, u_int32_t value)
802 return(twe_set_param(sc, table_id, param_id, sizeof(value), &value));
806 /********************************************************************************
807 * Perform a TWE_OP_SET_PARAM command, returns nonzero on error.
810 twe_set_param(struct twe_softc *sc, int table_id, int param_id, int param_size, void *data)
812 struct twe_request *tr;
824 if (twe_get_request(sc, &tr))
828 param = (TWE_Param *)kmalloc(TWE_SECTOR_SIZE, M_DEVBUF, M_INTWAIT);
830 tr->tr_length = TWE_SECTOR_SIZE;
831 tr->tr_flags = TWE_CMD_DATAIN | TWE_CMD_DATAOUT;
833 /* build the command for the controller */
834 cmd = TWE_FIND_COMMAND(tr);
835 cmd->param.opcode = TWE_OP_SET_PARAM;
838 cmd->param.param_count = 1;
840 /* fill in the outbound parameter data */
841 param->table_id = table_id;
842 param->parameter_id = param_id;
843 param->parameter_size_bytes = param_size;
844 bcopy(data, param->data, param_size);
846 /* XXX could use twe_wait_request here if interrupts were enabled? */
847 error = twe_immediate_request(tr, 1 /* usetmp */);
849 if (twe_report_request(tr))
855 twe_release_request(tr);
857 kfree(param, M_DEVBUF);
861 /********************************************************************************
862 * Perform a TWE_OP_INIT_CONNECTION command, returns nonzero on error.
864 * Typically called with interrupts disabled.
867 twe_init_connection(struct twe_softc *sc, int mode)
869 struct twe_request *tr;
876 if (twe_get_request(sc, &tr))
879 /* build the command */
880 cmd = TWE_FIND_COMMAND(tr);
881 cmd->initconnection.opcode = TWE_OP_INIT_CONNECTION;
882 cmd->initconnection.size = 3;
883 cmd->initconnection.host_id = 0;
884 cmd->initconnection.message_credits = mode;
885 cmd->initconnection.response_queue_pointer = 0;
887 /* submit the command */
888 error = twe_immediate_request(tr, 0 /* usetmp */);
889 twe_release_request(tr);
891 if (mode == TWE_INIT_MESSAGE_CREDITS)
892 sc->twe_host_id = cmd->initconnection.host_id;
896 /********************************************************************************
897 * Start the command (tr) and sleep waiting for it to complete.
899 * Successfully completed commands are dequeued.
902 twe_wait_request(struct twe_request *tr)
906 tr->tr_flags |= TWE_CMD_SLEEPER;
907 tr->tr_status = TWE_CMD_BUSY;
908 twe_enqueue_ready(tr);
909 twe_startio(tr->tr_sc);
911 while (tr->tr_status == TWE_CMD_BUSY)
912 tsleep(tr, 0, "twewait", 0);
915 return(tr->tr_status != TWE_CMD_COMPLETE);
918 /********************************************************************************
919 * Start the command (tr) and busy-wait for it to complete.
920 * This should only be used when interrupts are actually disabled (although it
921 * will work if they are not).
924 twe_immediate_request(struct twe_request *tr, int usetmp)
926 struct twe_softc *sc;
934 if (usetmp && (tr->tr_data != NULL)) {
935 tr->tr_flags |= TWE_CMD_IMMEDIATE;
936 if (tr->tr_length > MAXBSIZE)
938 bcopy(tr->tr_data, sc->twe_immediate, tr->tr_length);
940 tr->tr_status = TWE_CMD_BUSY;
941 if ((error = twe_map_request(tr)) != 0)
945 /* Wait up to 5 seconds for the command to complete */
946 while ((count++ < 5000) && (tr->tr_status == TWE_CMD_BUSY)){
950 if (usetmp && (tr->tr_data != NULL))
951 bcopy(sc->twe_immediate, tr->tr_data, tr->tr_length);
953 return(tr->tr_status != TWE_CMD_COMPLETE);
956 /********************************************************************************
957 * Handle completion of an I/O command.
960 twe_completeio(struct twe_request *tr)
962 TWE_Command *cmd = TWE_FIND_COMMAND(tr);
963 struct twe_softc *sc = tr->tr_sc;
964 struct bio *bio = (twe_bio *)tr->tr_private;
965 struct buf *bp = bio->bio_buf;
969 if (tr->tr_status == TWE_CMD_COMPLETE) {
971 if (cmd->generic.status)
972 if (twe_report_request(tr)) {
974 bp->b_flags |= B_ERROR;
978 twe_panic(sc, "twe_completeio on incomplete command");
980 tr->tr_private = NULL;
982 twe_release_request(tr);
985 /********************************************************************************
986 * Reset the controller and pull all the active commands back onto the ready
987 * queue. Used to restart a controller that's exhibiting bad behaviour.
990 twe_reset(struct twe_softc *sc)
992 struct twe_request *tr;
996 * Sleep for a short period to allow AENs to be signalled.
998 tsleep(sc, 0, "twereset", hz);
1001 * Disable interrupts from the controller, and mask any accidental entry
1002 * into our interrupt handler.
1004 twe_printf(sc, "controller reset in progress...\n");
1005 twe_disable_interrupts(sc);
1009 * Try to soft-reset the controller.
1011 for (i = 0; i < TWE_MAX_RESET_TRIES; i++) {
1014 twe_printf(sc, "reset %d failed, trying again\n", i);
1016 if (!twe_soft_reset(sc))
1017 break; /* reset process complete */
1019 /* did we give up? */
1020 if (i >= TWE_MAX_RESET_TRIES) {
1021 twe_printf(sc, "can't reset controller, giving up\n");
1026 * Move all of the commands that were busy back to the ready queue.
1029 while ((tr = twe_dequeue_busy(sc)) != NULL) {
1030 twe_enqueue_ready(tr);
1035 * Kick the controller to start things going again, then re-enable interrupts.
1038 twe_enable_interrupts(sc);
1039 twe_printf(sc, "controller reset done, %d commands restarted\n", i);
1043 twe_enable_interrupts(sc);
1046 /********************************************************************************
1047 ********************************************************************************
1048 Command I/O to Controller
1049 ********************************************************************************
1050 ********************************************************************************/
1052 /********************************************************************************
1053 * Try to deliver (tr) to the controller.
1055 * Can be called at any interrupt level, with or without interrupts enabled.
1058 twe_start(struct twe_request *tr)
1060 struct twe_softc *sc = tr->tr_sc;
1063 u_int32_t status_reg;
1067 /* mark the command as currently being processed */
1068 tr->tr_status = TWE_CMD_BUSY;
1069 cmd = TWE_FIND_COMMAND(tr);
1072 * Spin briefly waiting for the controller to come ready
1074 * XXX it might be more efficient to return EBUSY immediately
1075 * and let the command be rescheduled.
1077 for (i = 100000, done = 0; (i > 0) && !done; i--) {
1080 /* check to see if we can post a command */
1081 status_reg = TWE_STATUS(sc);
1082 twe_check_bits(sc, status_reg);
1084 if (!(status_reg & TWE_STATUS_COMMAND_QUEUE_FULL)) {
1085 twe_enqueue_busy(tr);
1087 TWE_COMMAND_QUEUE(sc, TWE_FIND_COMMANDPHYS(tr));
1089 /* move command to work queue */
1091 if (tr->tr_complete != NULL) {
1092 debug(3, "queued request %d with callback %p", cmd->generic.request_id, tr->tr_complete);
1093 } else if (tr->tr_flags & TWE_CMD_SLEEPER) {
1094 debug(3, "queued request %d with wait channel %p", cmd->generic.request_id, tr);
1096 debug(3, "queued request %d for polling caller", cmd->generic.request_id);
1100 crit_exit(); /* drop critical section to allow completion interrupts */
1103 /* command is enqueued */
1108 * We couldn't get the controller to take the command; try submitting it again later.
1109 * This should only happen if something is wrong with the controller, or if we have
1110 * overestimated the number of commands it can accept. (Should we actually reject
1111 * the command at this point?)
1116 /********************************************************************************
1117 * Poll the controller (sc) for completed commands.
1119 * Can be called at any interrupt level, with or without interrupts enabled.
1122 twe_done(struct twe_softc *sc)
1124 TWE_Response_Queue rq;
1126 struct twe_request *tr;
1128 u_int32_t status_reg;
1132 /* loop collecting completed commands */
1136 status_reg = TWE_STATUS(sc);
1137 twe_check_bits(sc, status_reg); /* XXX should this fail? */
1139 if (!(status_reg & TWE_STATUS_RESPONSE_QUEUE_EMPTY)) {
1141 rq = TWE_RESPONSE_QUEUE(sc);
1142 tr = sc->twe_lookup[rq.u.response_id]; /* find command */
1143 cmd = TWE_FIND_COMMAND(tr);
1144 if (tr->tr_status != TWE_CMD_BUSY)
1145 twe_printf(sc, "completion event for nonbusy command\n");
1146 tr->tr_status = TWE_CMD_COMPLETE;
1147 debug(3, "completed request id %d with status %d",
1148 cmd->generic.request_id, cmd->generic.status);
1149 /* move to completed queue */
1150 twe_remove_busy(tr);
1151 twe_enqueue_complete(tr);
1152 sc->twe_state &= ~TWE_STATE_CTLR_BUSY;
1154 break; /* no response ready */
1159 /* if we've completed any commands, try posting some more */
1163 /* handle completion and timeouts */
1164 twe_complete(sc); /* XXX use deferred completion? */
1167 /********************************************************************************
1168 * Perform post-completion processing for commands on (sc).
1170 * This is split from twe_done as it can be safely deferred and run at a lower
1171 * priority level should facilities for such a thing become available.
1174 twe_complete(struct twe_softc *sc)
1176 struct twe_request *tr;
1181 * Pull commands off the completed list, dispatch them appropriately
1183 while ((tr = twe_dequeue_complete(sc)) != NULL) {
1184 /* unmap the command's data buffer */
1185 twe_unmap_request(tr);
1187 /* dispatch to suit command originator */
1188 if (tr->tr_complete != NULL) { /* completion callback */
1189 debug(2, "call completion handler %p", tr->tr_complete);
1190 tr->tr_complete(tr);
1192 } else if (tr->tr_flags & TWE_CMD_SLEEPER) { /* caller is asleep waiting */
1193 debug(2, "wake up command owner on %p", tr);
1196 } else { /* caller is polling command */
1197 debug(2, "command left for owner");
1202 /********************************************************************************
1203 * Wait for (status) to be set in the controller status register for up to
1204 * (timeout) seconds. Returns 0 if found, nonzero if we time out.
1206 * Note: this busy-waits, rather than sleeping, since we may be called with
1207 * eg. clock interrupts masked.
1210 twe_wait_status(struct twe_softc *sc, u_int32_t status, int timeout)
1213 u_int32_t status_reg;
1217 expiry = time_second + timeout;
1220 status_reg = TWE_STATUS(sc);
1221 if (status_reg & status) /* got the required bit(s)? */
1224 } while (time_second <= expiry);
1229 /********************************************************************************
1230 * Drain the response queue, which may contain responses to commands we know
1234 twe_drain_response_queue(struct twe_softc *sc)
1236 TWE_Response_Queue rq;
1237 u_int32_t status_reg;
1241 for (;;) { /* XXX give up eventually? */
1242 status_reg = TWE_STATUS(sc);
1243 if (twe_check_bits(sc, status_reg))
1245 if (status_reg & TWE_STATUS_RESPONSE_QUEUE_EMPTY)
1247 rq = TWE_RESPONSE_QUEUE(sc);
1251 /********************************************************************************
1252 * Soft-reset the controller
1255 twe_soft_reset(struct twe_softc *sc)
1257 u_int32_t status_reg;
1263 if (twe_wait_status(sc, TWE_STATUS_ATTENTION_INTERRUPT, 30)) {
1264 twe_printf(sc, "no attention interrupt\n");
1267 TWE_CONTROL(sc, TWE_CONTROL_CLEAR_ATTENTION_INTERRUPT);
1268 if (twe_drain_aen_queue(sc)) {
1269 twe_printf(sc, "can't drain AEN queue\n");
1272 if (twe_find_aen(sc, TWE_AEN_SOFT_RESET)) {
1273 twe_printf(sc, "reset not reported\n");
1276 status_reg = TWE_STATUS(sc);
1277 if (TWE_STATUS_ERRORS(status_reg) || twe_check_bits(sc, status_reg)) {
1278 twe_printf(sc, "controller errors detected\n");
1281 if (twe_drain_response_queue(sc)) {
1282 twe_printf(sc, "can't drain response queue\n");
1288 /********************************************************************************
1289 ********************************************************************************
1291 ********************************************************************************
1292 ********************************************************************************/
1294 /********************************************************************************
1297 * XXX what does this mean?
1300 twe_host_intr(struct twe_softc *sc)
1304 twe_printf(sc, "host interrupt\n");
1305 TWE_CONTROL(sc, TWE_CONTROL_CLEAR_HOST_INTERRUPT);
1308 /********************************************************************************
1309 * Attention interrupt.
1311 * Signalled when the controller has one or more AENs for us.
1314 twe_attention_intr(struct twe_softc *sc)
1318 /* instigate a poll for AENs */
1319 if (twe_fetch_aen(sc)) {
1320 twe_printf(sc, "error polling for signalled AEN\n");
1322 TWE_CONTROL(sc, TWE_CONTROL_CLEAR_ATTENTION_INTERRUPT);
1326 /********************************************************************************
1327 * Command interrupt.
1329 * Signalled when the controller can handle more commands.
1332 twe_command_intr(struct twe_softc *sc)
1337 * We don't use this, rather we try to submit commands when we receive
1338 * them, and when other commands have completed. Mask it so we don't get
1341 TWE_CONTROL(sc, TWE_CONTROL_MASK_COMMAND_INTERRUPT);
1344 /********************************************************************************
1345 ********************************************************************************
1346 Asynchronous Event Handling
1347 ********************************************************************************
1348 ********************************************************************************/
1350 /********************************************************************************
1351 * Request an AEN from the controller.
1354 twe_fetch_aen(struct twe_softc *sc)
1359 if ((twe_get_param(sc, TWE_PARAM_AEN, TWE_PARAM_AEN_UnitCode, 2, twe_handle_aen)) == NULL)
1364 /********************************************************************************
1365 * Handle an AEN returned by the controller.
1368 twe_handle_aen(struct twe_request *tr)
1370 struct twe_softc *sc = tr->tr_sc;
1376 /* XXX check for command success somehow? */
1378 param = (TWE_Param *)tr->tr_data;
1379 aen = *(u_int16_t *)(param->data);
1381 kfree(tr->tr_data, M_DEVBUF);
1382 twe_release_request(tr);
1383 twe_enqueue_aen(sc, aen);
1385 /* XXX poll for more AENs? */
1388 /********************************************************************************
1389 * Pull AENs out of the controller and park them in the queue, in a context where
1390 * interrupts aren't active. Return nonzero if we encounter any errors in the
1391 * process of obtaining all the available AENs.
1394 twe_drain_aen_queue(struct twe_softc *sc)
1399 if (twe_get_param_2(sc, TWE_PARAM_AEN, TWE_PARAM_AEN_UnitCode, &aen))
1401 if (aen == TWE_AEN_QUEUE_EMPTY)
1403 twe_enqueue_aen(sc, aen);
1407 /********************************************************************************
1408 * Push an AEN that we've received onto the queue.
1410 * Note that we have to lock this against reentrance, since it may be called
1411 * from both interrupt and non-interrupt context.
1413 * If someone is waiting for the AEN we have, wake them up.
1416 twe_enqueue_aen(struct twe_softc *sc, u_int16_t aen)
1423 if ((msg = twe_format_aen(sc, aen)) != NULL)
1424 twe_printf(sc, "AEN: <%s>\n", msg);
1427 /* enqueue the AEN */
1428 next = ((sc->twe_aen_head + 1) % TWE_Q_LENGTH);
1429 nextnext = ((sc->twe_aen_head + 2) % TWE_Q_LENGTH);
1431 /* check to see if this is the last free slot, and subvert the AEN if it is */
1432 if (nextnext == sc->twe_aen_tail)
1433 aen = TWE_AEN_QUEUE_FULL;
1435 /* look to see if there's room for this AEN */
1436 if (next != sc->twe_aen_tail) {
1437 sc->twe_aen_queue[sc->twe_aen_head] = aen;
1438 sc->twe_aen_head = next;
1441 /* wake up anyone asleep on the queue */
1442 wakeup(&sc->twe_aen_queue);
1444 /* anyone looking for this AEN? */
1445 if (sc->twe_wait_aen == aen) {
1446 sc->twe_wait_aen = -1;
1447 wakeup(&sc->twe_wait_aen);
1452 /********************************************************************************
1453 * Pop an AEN off the queue, or return -1 if there are none left.
1455 * We are more or less interrupt-safe, so don't block interrupts.
1458 twe_dequeue_aen(struct twe_softc *sc)
1464 if (sc->twe_aen_tail == sc->twe_aen_head) {
1465 result = TWE_AEN_QUEUE_EMPTY;
1467 result = sc->twe_aen_queue[sc->twe_aen_tail];
1468 sc->twe_aen_tail = ((sc->twe_aen_tail + 1) % TWE_Q_LENGTH);
1473 /********************************************************************************
1474 * Check to see if the requested AEN is in the queue.
1476 * XXX we could probably avoid masking interrupts here
1479 twe_find_aen(struct twe_softc *sc, u_int16_t aen)
1485 for (i = sc->twe_aen_tail; (i != sc->twe_aen_head) && missing; i = (i + 1) % TWE_Q_LENGTH) {
1486 if (sc->twe_aen_queue[i] == aen)
1494 #if 0 /* currently unused */
1495 /********************************************************************************
1496 * Sleep waiting for at least (timeout) seconds until we see (aen) as
1497 * requested. Returns nonzero on timeout or failure.
1499 * XXX: this should not be used in cases where there may be more than one sleeper
1500 * without a mechanism for registering multiple sleepers.
1503 twe_wait_aen(struct twe_softc *sc, int aen, int timeout)
1510 expiry = time_second + timeout;
1514 sc->twe_wait_aen = aen;
1517 tsleep(&sc->twe_wait_aen, PZERO, "twewaen", hz);
1518 if (sc->twe_wait_aen == -1)
1520 } while ((time_second <= expiry) && !found);
1526 /********************************************************************************
1527 ********************************************************************************
1528 Command Buffer Management
1529 ********************************************************************************
1530 ********************************************************************************/
1532 /********************************************************************************
1533 * Get a new command buffer.
1535 * This will return NULL if all command buffers are in use.
1538 twe_get_request(struct twe_softc *sc, struct twe_request **tr)
1543 /* try to reuse an old buffer */
1544 *tr = twe_dequeue_free(sc);
1546 /* initialise some fields to their defaults */
1548 cmd = TWE_FIND_COMMAND(*tr);
1549 (*tr)->tr_data = NULL;
1550 (*tr)->tr_private = NULL;
1551 (*tr)->tr_status = TWE_CMD_SETUP; /* command is in setup phase */
1552 (*tr)->tr_flags = 0;
1553 (*tr)->tr_complete = NULL;
1554 cmd->generic.status = 0; /* before submission to controller */
1555 cmd->generic.flags = 0; /* not used */
1557 return(*tr == NULL);
1560 /********************************************************************************
1561 * Release a command buffer for reuse.
1565 twe_release_request(struct twe_request *tr)
1569 if (tr->tr_private != NULL)
1570 twe_panic(tr->tr_sc, "tr_private != NULL");
1571 twe_enqueue_free(tr);
1574 /********************************************************************************
1575 ********************************************************************************
1577 ********************************************************************************
1578 ********************************************************************************/
1580 /********************************************************************************
1581 * Print some information about the controller
1584 twe_describe_controller(struct twe_softc *sc)
1593 /* get the port count */
1594 twe_get_param_1(sc, TWE_PARAM_CONTROLLER, TWE_PARAM_CONTROLLER_PortCount, &ports);
1596 /* get version strings */
1597 p[0] = twe_get_param(sc, TWE_PARAM_VERSION, TWE_PARAM_VERSION_FW, 16, NULL);
1598 p[1] = twe_get_param(sc, TWE_PARAM_VERSION, TWE_PARAM_VERSION_BIOS, 16, NULL);
1600 twe_printf(sc, "%d ports, Firmware %.16s, BIOS %.16s\n", ports, p[0]->data, p[1]->data);
1603 p[2] = twe_get_param(sc, TWE_PARAM_VERSION, TWE_PARAM_VERSION_Mon, 16, NULL);
1604 p[3] = twe_get_param(sc, TWE_PARAM_VERSION, TWE_PARAM_VERSION_PCB, 8, NULL);
1605 p[4] = twe_get_param(sc, TWE_PARAM_VERSION, TWE_PARAM_VERSION_ATA, 8, NULL);
1606 p[5] = twe_get_param(sc, TWE_PARAM_VERSION, TWE_PARAM_VERSION_PCI, 8, NULL);
1608 if (p[2] && p[3] && p[4] && p[5])
1609 twe_printf(sc, "Monitor %.16s, PCB %.8s, Achip %.8s, Pchip %.8s\n", p[2]->data, p[3]->data,
1610 p[4]->data, p[5]->data);
1612 kfree(p[2], M_DEVBUF);
1614 kfree(p[3], M_DEVBUF);
1616 kfree(p[4], M_DEVBUF);
1618 kfree(p[5], M_DEVBUF);
1621 kfree(p[0], M_DEVBUF);
1623 kfree(p[1], M_DEVBUF);
1625 /* print attached drives */
1627 p[0] = twe_get_param(sc, TWE_PARAM_DRIVESUMMARY, TWE_PARAM_DRIVESUMMARY_Status, 16, NULL);
1628 for (i = 0; i < ports; i++) {
1629 if (p[0]->data[i] != TWE_PARAM_DRIVESTATUS_Present)
1631 twe_get_param_4(sc, TWE_PARAM_DRIVEINFO + i, TWE_PARAM_DRIVEINFO_Size, &size);
1632 p[1] = twe_get_param(sc, TWE_PARAM_DRIVEINFO + i, TWE_PARAM_DRIVEINFO_Model, 40, NULL);
1634 twe_printf(sc, "port %d: %.40s %dMB\n", i, p[1]->data, size / 2048);
1635 kfree(p[1], M_DEVBUF);
1637 twe_printf(sc, "port %d, drive status unavailable\n", i);
1641 kfree(p[0], M_DEVBUF);
1645 /********************************************************************************
1646 * Look up a text description of a numeric code and return a pointer to same.
1649 twe_describe_code(struct twe_code_lookup *table, u_int32_t code)
1653 for (i = 0; table[i].string != NULL; i++)
1654 if (table[i].code == code)
1655 return(table[i].string);
1656 return(table[i+1].string);
1659 /********************************************************************************
1660 * Complain if the status bits aren't what we're expecting.
1662 * Rate-limit the complaints to at most one of each every five seconds, but
1663 * always return the correct status.
1666 twe_check_bits(struct twe_softc *sc, u_int32_t status_reg)
1669 static time_t lastwarn[2] = {0, 0};
1672 * This can be a little problematic, as twe_panic may call twe_reset if
1673 * TWE_DEBUG is not set, which will call us again as part of the soft reset.
1675 if ((status_reg & TWE_STATUS_PANIC_BITS) != 0) {
1676 twe_printf(sc, "FATAL STATUS BIT(S) %b\n", status_reg & TWE_STATUS_PANIC_BITS,
1677 TWE_STATUS_BITS_DESCRIPTION);
1678 twe_panic(sc, "fatal status bits");
1682 if ((status_reg & TWE_STATUS_EXPECTED_BITS) != TWE_STATUS_EXPECTED_BITS) {
1683 if (time_second > (lastwarn[0] + 5)) {
1684 twe_printf(sc, "missing expected status bit(s) %b\n", ~status_reg & TWE_STATUS_EXPECTED_BITS,
1685 TWE_STATUS_BITS_DESCRIPTION);
1686 lastwarn[0] = time_second;
1691 if ((status_reg & TWE_STATUS_UNEXPECTED_BITS) != 0) {
1692 if (time_second > (lastwarn[1] + 5)) {
1693 twe_printf(sc, "unexpected status bit(s) %b\n", status_reg & TWE_STATUS_UNEXPECTED_BITS,
1694 TWE_STATUS_BITS_DESCRIPTION);
1695 lastwarn[1] = time_second;
1698 if (status_reg & TWE_STATUS_PCI_PARITY_ERROR) {
1699 twe_printf(sc, "PCI parity error: Reseat card, move card or buggy device present.\n");
1700 twe_clear_pci_parity_error(sc);
1702 if (status_reg & TWE_STATUS_PCI_ABORT) {
1703 twe_printf(sc, "PCI abort, clearing.\n");
1704 twe_clear_pci_abort(sc);
1711 /********************************************************************************
1712 * Return a string describing (aen).
1714 * The low 8 bits of the aen are the code, the high 8 bits give the unit number
1715 * where an AEN is specific to a unit.
1717 * Note that we could expand this routine to handle eg. up/downgrading the status
1718 * of a drive if we had some idea of what the drive's initial status was.
1722 twe_format_aen(struct twe_softc *sc, u_int16_t aen)
1724 static char buf[80];
1728 code = twe_describe_code(twe_table_aen, TWE_AEN_CODE(aen));
1740 if ((child = sc->twe_drive[TWE_AEN_UNIT(aen)].td_disk) != NULL) {
1741 ksprintf(buf, "twed%d: %s", device_get_unit(child), msg);
1743 ksprintf(buf, "twe%d: %s for unknown unit %d", device_get_unit(sc->twe_dev),
1744 msg, TWE_AEN_UNIT(aen));
1749 ksprintf(buf, "twe%d: port %d: %s", device_get_unit(sc->twe_dev), TWE_AEN_UNIT(aen),
1758 ksprintf(buf, "unknown AEN 0x%x", aen);
1762 /********************************************************************************
1763 * Print a diagnostic if the status of the command warrants it, and return
1764 * either zero (command was ok) or nonzero (command failed).
1767 twe_report_request(struct twe_request *tr)
1769 struct twe_softc *sc = tr->tr_sc;
1770 TWE_Command *cmd = TWE_FIND_COMMAND(tr);
1774 * Check the command status value and handle accordingly.
1776 if (cmd->generic.status == TWE_STATUS_RESET) {
1778 * The status code 0xff requests a controller reset.
1780 twe_printf(sc, "command returned with controller reset request\n");
1783 } else if (cmd->generic.status > TWE_STATUS_FATAL) {
1785 * Fatal errors that don't require controller reset.
1787 * We know a few special flags values.
1789 switch (cmd->generic.flags) {
1791 device_printf(sc->twe_drive[cmd->generic.unit].td_disk,
1795 device_printf(sc->twe_drive[cmd->generic.unit].td_disk,
1796 "unrecoverable drive error\n");
1799 device_printf(sc->twe_drive[cmd->generic.unit].td_disk,
1800 "controller error - %s (flags = 0x%x)\n",
1801 twe_describe_code(twe_table_status, cmd->generic.status),
1802 cmd->generic.flags);
1805 } else if (cmd->generic.status > TWE_STATUS_WARNING) {
1807 * Warning level status.
1809 device_printf(sc->twe_drive[cmd->generic.unit].td_disk,
1810 "warning - %s (flags = 0x%x)\n",
1811 twe_describe_code(twe_table_status, cmd->generic.status),
1812 cmd->generic.flags);
1813 } else if (cmd->generic.status > 0x40) {
1815 * Info level status.
1817 device_printf(sc->twe_drive[cmd->generic.unit].td_disk,
1818 "attention - %s (flags = 0x%x)\n",
1819 twe_describe_code(twe_table_status, cmd->generic.status),
1820 cmd->generic.flags);
1826 /********************************************************************************
1827 * Print some controller state to aid in debugging error/panic conditions
1830 twe_print_controller(struct twe_softc *sc)
1832 u_int32_t status_reg;
1834 status_reg = TWE_STATUS(sc);
1835 twe_printf(sc, "status %b\n", status_reg, TWE_STATUS_BITS_DESCRIPTION);
1836 twe_printf(sc, " current max min\n");
1837 twe_printf(sc, "free %04d %04d %04d\n",
1838 sc->twe_qstat[TWEQ_FREE].q_length, sc->twe_qstat[TWEQ_FREE].q_max, sc->twe_qstat[TWEQ_FREE].q_min);
1840 twe_printf(sc, "ready %04d %04d %04d\n",
1841 sc->twe_qstat[TWEQ_READY].q_length, sc->twe_qstat[TWEQ_READY].q_max, sc->twe_qstat[TWEQ_READY].q_min);
1843 twe_printf(sc, "busy %04d %04d %04d\n",
1844 sc->twe_qstat[TWEQ_BUSY].q_length, sc->twe_qstat[TWEQ_BUSY].q_max, sc->twe_qstat[TWEQ_BUSY].q_min);
1846 twe_printf(sc, "complete %04d %04d %04d\n",
1847 sc->twe_qstat[TWEQ_COMPLETE].q_length, sc->twe_qstat[TWEQ_COMPLETE].q_max, sc->twe_qstat[TWEQ_COMPLETE].q_min);
1849 twe_printf(sc, "bioq %04d %04d %04d\n",
1850 sc->twe_qstat[TWEQ_BIO].q_length, sc->twe_qstat[TWEQ_BIO].q_max, sc->twe_qstat[TWEQ_BIO].q_min);
1852 twe_printf(sc, "AEN queue head %d tail %d\n", sc->twe_aen_head, sc->twe_aen_tail);
1856 twe_panic(struct twe_softc *sc, char *reason)
1858 twe_print_controller(sc);
1867 /********************************************************************************
1868 * Print a request/command in human-readable format.
1871 twe_print_request(struct twe_request *tr)
1873 struct twe_softc *sc = tr->tr_sc;
1874 TWE_Command *cmd = TWE_FIND_COMMAND(tr);
1877 twe_printf(sc, "CMD: request_id %d opcode <%s> size %d unit %d host_id %d\n",
1878 cmd->generic.request_id, twe_describe_code(twe_table_opcode, cmd->generic.opcode), cmd->generic.size,
1879 cmd->generic.unit, cmd->generic.host_id);
1880 twe_printf(sc, " status %d flags 0x%x count %d sgl_offset %d\n",
1881 cmd->generic.status, cmd->generic.flags, cmd->generic.count, cmd->generic.sgl_offset);
1883 switch(cmd->generic.opcode) { /* XXX add more opcodes? */
1886 twe_printf(sc, " lba %d\n", cmd->io.lba);
1887 for (i = 0; (i < TWE_MAX_SGL_LENGTH) && (cmd->io.sgl[i].length != 0); i++)
1888 twe_printf(sc, " %d: 0x%x/%d\n",
1889 i, cmd->io.sgl[i].address, cmd->io.sgl[i].length);
1892 case TWE_OP_GET_PARAM:
1893 case TWE_OP_SET_PARAM:
1894 for (i = 0; (i < TWE_MAX_SGL_LENGTH) && (cmd->param.sgl[i].length != 0); i++)
1895 twe_printf(sc, " %d: 0x%x/%d\n",
1896 i, cmd->param.sgl[i].address, cmd->param.sgl[i].length);
1899 case TWE_OP_INIT_CONNECTION:
1900 twe_printf(sc, " response queue pointer 0x%x\n",
1901 cmd->initconnection.response_queue_pointer);
1907 twe_printf(sc, " tr_command %p/0x%x tr_data %p/0x%x,%d\n",
1908 tr, TWE_FIND_COMMANDPHYS(tr), tr->tr_data, tr->tr_dataphys, tr->tr_length);
1909 twe_printf(sc, " tr_status %d tr_flags 0x%x tr_complete %p tr_private %p\n",
1910 tr->tr_status, tr->tr_flags, tr->tr_complete, tr->tr_private);