2 * Copyright (c) 2000 Michael Smith
3 * Copyright (c) 2000 BSDi
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * $FreeBSD: src/sys/dev/twe/twe_freebsd.c,v 1.2.2.5 2002/03/07 09:57:02 msmith Exp $
31 * FreeBSD-specific code.
34 #include <sys/param.h>
36 #include <machine/bus.h>
37 #include <machine/clock.h>
38 #include <machine/md_var.h>
41 #include <dev/twe/twe_compat.h>
42 #include <dev/twe/twereg.h>
43 #include <dev/twe/tweio.h>
44 #include <dev/twe/twevar.h>
45 #include <dev/twe/twe_tables.h>
47 #include <sys/devicestat.h>
49 static devclass_t twe_devclass;
52 static u_int32_t twed_bio_in;
53 #define TWED_BIO_IN twed_bio_in++
54 static u_int32_t twed_bio_out;
55 #define TWED_BIO_OUT twed_bio_out++
61 /********************************************************************************
62 ********************************************************************************
63 Control device interface
64 ********************************************************************************
65 ********************************************************************************/
67 static d_open_t twe_open;
68 static d_close_t twe_close;
69 static d_ioctl_t twe_ioctl_wrapper;
71 #define TWE_CDEV_MAJOR 146
73 static struct cdevsw twe_cdevsw = {
89 /********************************************************************************
90 * Accept an open operation on the control device.
93 twe_open(dev_t dev, int flags, int fmt, d_thread_t *td)
95 int unit = minor(dev);
96 struct twe_softc *sc = devclass_get_softc(twe_devclass, unit);
98 sc->twe_state |= TWE_STATE_OPEN;
102 /********************************************************************************
103 * Accept the last close on the control device.
106 twe_close(dev_t dev, int flags, int fmt, d_thread_t *td)
108 int unit = minor(dev);
109 struct twe_softc *sc = devclass_get_softc(twe_devclass, unit);
111 sc->twe_state &= ~TWE_STATE_OPEN;
115 /********************************************************************************
116 * Handle controller-specific control operations.
119 twe_ioctl_wrapper(dev_t dev, u_long cmd, caddr_t addr, int32_t flag, d_thread_t *td)
121 struct twe_softc *sc = (struct twe_softc *)dev->si_drv1;
123 return(twe_ioctl(sc, cmd, addr));
126 /********************************************************************************
127 ********************************************************************************
129 ********************************************************************************
130 ********************************************************************************/
132 static int twe_probe(device_t dev);
133 static int twe_attach(device_t dev);
134 static void twe_free(struct twe_softc *sc);
135 static int twe_detach(device_t dev);
136 static int twe_shutdown(device_t dev);
137 static int twe_suspend(device_t dev);
138 static int twe_resume(device_t dev);
139 static void twe_pci_intr(void *arg);
140 static void twe_intrhook(void *arg);
142 static device_method_t twe_methods[] = {
143 /* Device interface */
144 DEVMETHOD(device_probe, twe_probe),
145 DEVMETHOD(device_attach, twe_attach),
146 DEVMETHOD(device_detach, twe_detach),
147 DEVMETHOD(device_shutdown, twe_shutdown),
148 DEVMETHOD(device_suspend, twe_suspend),
149 DEVMETHOD(device_resume, twe_resume),
151 DEVMETHOD(bus_print_child, bus_generic_print_child),
152 DEVMETHOD(bus_driver_added, bus_generic_driver_added),
156 static driver_t twe_pci_driver = {
159 sizeof(struct twe_softc)
163 DRIVER_MODULE(Xtwe, pci, twe_pci_driver, twe_devclass, 0, 0);
165 DRIVER_MODULE(twe, pci, twe_pci_driver, twe_devclass, 0, 0);
168 /********************************************************************************
169 * Match a 3ware Escalade ATA RAID controller.
172 twe_probe(device_t dev)
177 if ((pci_get_vendor(dev) == TWE_VENDOR_ID) &&
178 ((pci_get_device(dev) == TWE_DEVICE_ID) ||
179 (pci_get_device(dev) == TWE_DEVICE_ID_ASIC))) {
180 device_set_desc(dev, TWE_DEVICE_NAME);
190 /********************************************************************************
191 * Allocate resources, initialise the controller.
194 twe_attach(device_t dev)
196 struct twe_softc *sc;
203 * Initialise the softc structure.
205 sc = device_get_softc(dev);
209 * Make sure we are going to be able to talk to this board.
211 command = pci_read_config(dev, PCIR_COMMAND, 2);
212 if ((command & PCIM_CMD_PORTEN) == 0) {
213 twe_printf(sc, "register window not available\n");
217 * Force the busmaster enable bit on, in case the BIOS forgot.
219 command |= PCIM_CMD_BUSMASTEREN;
220 pci_write_config(dev, PCIR_COMMAND, command, 2);
223 * Allocate the PCI register window.
225 rid = TWE_IO_CONFIG_REG;
226 if ((sc->twe_io = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 0, ~0, 1, RF_ACTIVE)) == NULL) {
227 twe_printf(sc, "can't allocate register window\n");
231 sc->twe_btag = rman_get_bustag(sc->twe_io);
232 sc->twe_bhandle = rman_get_bushandle(sc->twe_io);
235 * Allocate the parent bus DMA tag appropriate for PCI.
237 if (bus_dma_tag_create(NULL, /* parent */
238 1, 0, /* alignment, boundary */
239 BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
240 BUS_SPACE_MAXADDR, /* highaddr */
241 NULL, NULL, /* filter, filterarg */
242 MAXBSIZE, TWE_MAX_SGL_LENGTH, /* maxsize, nsegments */
243 BUS_SPACE_MAXSIZE_32BIT, /* maxsegsize */
244 BUS_DMA_ALLOCNOW, /* flags */
245 &sc->twe_parent_dmat)) {
246 twe_printf(sc, "can't allocate parent DMA tag\n");
252 * Allocate and connect our interrupt.
255 if ((sc->twe_irq = bus_alloc_resource(sc->twe_dev, SYS_RES_IRQ, &rid, 0, ~0, 1, RF_SHAREABLE | RF_ACTIVE)) == NULL) {
256 twe_printf(sc, "can't allocate interrupt\n");
260 if (bus_setup_intr(sc->twe_dev, sc->twe_irq, INTR_TYPE_BIO | INTR_ENTROPY, twe_pci_intr, sc, &sc->twe_intr)) {
261 twe_printf(sc, "can't set up interrupt\n");
267 * Create DMA tag for mapping objects into controller-addressable space.
269 if (bus_dma_tag_create(sc->twe_parent_dmat, /* parent */
270 1, 0, /* alignment, boundary */
271 BUS_SPACE_MAXADDR, /* lowaddr */
272 BUS_SPACE_MAXADDR, /* highaddr */
273 NULL, NULL, /* filter, filterarg */
274 MAXBSIZE, TWE_MAX_SGL_LENGTH,/* maxsize, nsegments */
275 BUS_SPACE_MAXSIZE_32BIT, /* maxsegsize */
277 &sc->twe_buffer_dmat)) {
278 twe_printf(sc, "can't allocate data buffer DMA tag\n");
284 * Initialise the controller and driver core.
286 if ((error = twe_setup(sc)))
290 * Print some information about the controller and configuration.
292 twe_describe_controller(sc);
295 * Create the control device.
297 sc->twe_dev_t = make_dev(&twe_cdevsw, device_get_unit(sc->twe_dev), UID_ROOT, GID_OPERATOR,
298 S_IRUSR | S_IWUSR, "twe%d", device_get_unit(sc->twe_dev));
299 sc->twe_dev_t->si_drv1 = sc;
301 * Schedule ourselves to bring the controller up once interrupts are available.
302 * This isn't strictly necessary, since we disable interrupts while probing the
303 * controller, but it is more in keeping with common practice for other disk
306 sc->twe_ich.ich_func = twe_intrhook;
307 sc->twe_ich.ich_arg = sc;
308 if (config_intrhook_establish(&sc->twe_ich) != 0) {
309 twe_printf(sc, "can't establish configuration hook\n");
317 /********************************************************************************
318 * Free all of the resources associated with (sc).
320 * Should not be called if the controller is active.
323 twe_free(struct twe_softc *sc)
325 struct twe_request *tr;
329 /* throw away any command buffers */
330 while ((tr = twe_dequeue_free(sc)) != NULL)
331 twe_free_request(tr);
333 /* destroy the data-transfer DMA tag */
334 if (sc->twe_buffer_dmat)
335 bus_dma_tag_destroy(sc->twe_buffer_dmat);
337 /* disconnect the interrupt handler */
339 bus_teardown_intr(sc->twe_dev, sc->twe_irq, sc->twe_intr);
340 if (sc->twe_irq != NULL)
341 bus_release_resource(sc->twe_dev, SYS_RES_IRQ, 0, sc->twe_irq);
343 /* destroy the parent DMA tag */
344 if (sc->twe_parent_dmat)
345 bus_dma_tag_destroy(sc->twe_parent_dmat);
347 /* release the register window mapping */
348 if (sc->twe_io != NULL)
349 bus_release_resource(sc->twe_dev, SYS_RES_IOPORT, TWE_IO_CONFIG_REG, sc->twe_io);
351 /* destroy control device */
352 if (sc->twe_dev_t != (dev_t)NULL)
353 destroy_dev(sc->twe_dev_t);
356 /********************************************************************************
357 * Disconnect from the controller completely, in preparation for unload.
360 twe_detach(device_t dev)
362 struct twe_softc *sc = device_get_softc(dev);
369 if (sc->twe_state & TWE_STATE_OPEN)
373 * Shut the controller down.
375 if ((error = twe_shutdown(dev)))
386 /********************************************************************************
387 * Bring the controller down to a dormant state and detach all child devices.
389 * Note that we can assume that the bioq on the controller is empty, as we won't
390 * allow shutdown if any device is open.
393 twe_shutdown(device_t dev)
395 struct twe_softc *sc = device_get_softc(dev);
404 * Delete all our child devices.
406 for (i = 0; i < TWE_MAX_UNITS; i++) {
407 if (sc->twe_drive[i].td_disk != 0) {
408 if ((error = device_delete_child(sc->twe_dev, sc->twe_drive[i].td_disk)) != 0)
410 sc->twe_drive[i].td_disk = 0;
415 * Bring the controller down.
424 /********************************************************************************
425 * Bring the controller to a quiescent state, ready for system suspend.
428 twe_suspend(device_t dev)
430 struct twe_softc *sc = device_get_softc(dev);
436 sc->twe_state |= TWE_STATE_SUSPEND;
438 twe_disable_interrupts(sc);
444 /********************************************************************************
445 * Bring the controller back to a state ready for operation.
448 twe_resume(device_t dev)
450 struct twe_softc *sc = device_get_softc(dev);
454 sc->twe_state &= ~TWE_STATE_SUSPEND;
455 twe_enable_interrupts(sc);
460 /*******************************************************************************
461 * Take an interrupt, or be poked by other code to look for interrupt-worthy
465 twe_pci_intr(void *arg)
467 twe_intr((struct twe_softc *)arg);
470 /********************************************************************************
471 * Delayed-startup hook
474 twe_intrhook(void *arg)
476 struct twe_softc *sc = (struct twe_softc *)arg;
478 /* pull ourselves off the intrhook chain */
479 config_intrhook_disestablish(&sc->twe_ich);
481 /* call core startup routine */
485 /********************************************************************************
486 * Given a detected drive, attach it to the bio interface.
488 * This is called from twe_init.
491 twe_attach_drive(struct twe_softc *sc, struct twe_drive *dr)
496 dr->td_disk = device_add_child(sc->twe_dev, NULL, -1);
497 if (dr->td_disk == NULL) {
498 twe_printf(sc, "device_add_child failed\n");
501 device_set_ivars(dr->td_disk, dr);
504 * XXX It would make sense to test the online/initialising bits, but they seem to be
507 sprintf(buf, "%s, %s", twe_describe_code(twe_table_unittype, dr->td_type),
508 twe_describe_code(twe_table_unitstate, dr->td_state & TWE_PARAM_UNITSTATUS_MASK));
509 device_set_desc_copy(dr->td_disk, buf);
511 if ((error = bus_generic_attach(sc->twe_dev)) != 0)
512 twe_printf(sc, "bus_generic_attach returned %d\n", error);
515 /********************************************************************************
516 * Clear a PCI parity error.
519 twe_clear_pci_parity_error(struct twe_softc *sc)
521 TWE_CONTROL(sc, TWE_CONTROL_CLEAR_PARITY_ERROR);
522 pci_write_config(sc->twe_dev, PCIR_STATUS, TWE_PCI_CLEAR_PARITY_ERROR, 2);
525 /********************************************************************************
529 twe_clear_pci_abort(struct twe_softc *sc)
531 TWE_CONTROL(sc, TWE_CONTROL_CLEAR_PCI_ABORT);
532 pci_write_config(sc->twe_dev, PCIR_STATUS, TWE_PCI_CLEAR_PCI_ABORT, 2);
535 /********************************************************************************
536 ********************************************************************************
538 ********************************************************************************
539 ********************************************************************************/
548 struct twe_softc *twed_controller; /* parent device softc */
549 struct twe_drive *twed_drive; /* drive data in parent softc */
550 struct disk twed_disk; /* generic disk handle */
551 struct devstat twed_stats; /* accounting */
552 struct disklabel twed_label; /* synthetic label */
554 #define TWED_OPEN (1<<0) /* drive is open (can't shut down) */
558 * Disk device bus interface
560 static int twed_probe(device_t dev);
561 static int twed_attach(device_t dev);
562 static int twed_detach(device_t dev);
564 static device_method_t twed_methods[] = {
565 DEVMETHOD(device_probe, twed_probe),
566 DEVMETHOD(device_attach, twed_attach),
567 DEVMETHOD(device_detach, twed_detach),
571 static driver_t twed_driver = {
574 sizeof(struct twed_softc)
577 static devclass_t twed_devclass;
579 DRIVER_MODULE(Xtwed, Xtwe, twed_driver, twed_devclass, 0, 0);
581 DRIVER_MODULE(twed, twe, twed_driver, twed_devclass, 0, 0);
585 * Disk device control interface.
587 static d_open_t twed_open;
588 static d_close_t twed_close;
589 static d_strategy_t twed_strategy;
590 static d_dump_t twed_dump;
592 #define TWED_CDEV_MAJOR 147
594 static struct cdevsw twed_cdevsw = {
610 static struct cdevsw tweddisk_cdevsw;
612 static int disks_registered = 0;
615 /********************************************************************************
616 * Handle open from generic layer.
618 * Note that this is typically only called by the diskslice code, and not
619 * for opens on subdevices (eg. slices, partitions).
622 twed_open(dev_t dev, int flags, int fmt, d_thread_t *td)
624 struct twed_softc *sc = (struct twed_softc *)dev->si_drv1;
625 struct disklabel *label;
632 /* check that the controller is up and running */
633 if (sc->twed_controller->twe_state & TWE_STATE_SHUTDOWN)
636 /* build synthetic label */
637 label = &sc->twed_disk.d_label;
638 bzero(label, sizeof(*label));
639 label->d_type = DTYPE_ESDI;
640 label->d_secsize = TWE_BLOCK_SIZE;
641 label->d_nsectors = sc->twed_drive->td_sectors;
642 label->d_ntracks = sc->twed_drive->td_heads;
643 label->d_ncylinders = sc->twed_drive->td_cylinders;
644 label->d_secpercyl = sc->twed_drive->td_sectors * sc->twed_drive->td_heads;
645 label->d_secperunit = sc->twed_drive->td_size;
647 sc->twed_flags |= TWED_OPEN;
651 /********************************************************************************
652 * Handle last close of the disk device.
655 twed_close(dev_t dev, int flags, int fmt, d_thread_t *td)
657 struct twed_softc *sc = (struct twed_softc *)dev->si_drv1;
664 sc->twed_flags &= ~TWED_OPEN;
668 /********************************************************************************
669 * Handle an I/O request.
672 twed_strategy(twe_bio *bp)
674 struct twed_softc *sc = (struct twed_softc *)TWE_BIO_SOFTC(bp);
682 TWE_BIO_SET_ERROR(bp, EINVAL);
683 printf("twe: bio for invalid disk!\n");
689 /* perform accounting */
690 TWE_BIO_STATS_START(bp);
692 /* queue the bio on the controller */
693 twe_enqueue_bio(sc->twed_controller, bp);
695 /* poke the controller to start I/O */
696 twe_startio(sc->twed_controller);
700 /********************************************************************************
701 * System crashdump support
706 struct twed_softc *twed_sc = (struct twed_softc *)dev->si_drv1;
707 struct twe_softc *twe_sc = (struct twe_softc *)twed_sc->twed_controller;
708 u_int count, blkno, secsize;
709 vm_offset_t addr = 0;
711 int dumppages = MAXDUMPPGS;
715 if ((error = disk_dumpcheck(dev, &count, &blkno, &secsize)))
718 if (!twed_sc || !twe_sc)
721 blkcnt = howmany(PAGE_SIZE, secsize);
726 if ((count / blkcnt) < dumppages)
727 dumppages = count / blkcnt;
729 for (i = 0; i < dumppages; ++i) {
730 vm_offset_t a = addr + (i * PAGE_SIZE);
731 if (is_physical_memory(a))
732 va = pmap_kenter_temporary(trunc_page(a), i);
734 va = pmap_kenter_temporary(trunc_page(0), i);
737 if ((error = twe_dump_blocks(twe_sc, twed_sc->twed_drive->td_unit, blkno, va,
738 (PAGE_SIZE * dumppages) / TWE_BLOCK_SIZE)) != 0)
742 if (dumpstatus(addr, (off_t)count * DEV_BSIZE) < 0)
745 blkno += blkcnt * dumppages;
746 count -= blkcnt * dumppages;
747 addr += PAGE_SIZE * dumppages;
752 /********************************************************************************
753 * Handle completion of an I/O request.
756 twed_intr(twe_bio *bp)
760 /* if no error, transfer completed */
761 if (!TWE_BIO_HAS_ERROR(bp))
762 TWE_BIO_RESID(bp) = 0;
764 TWE_BIO_STATS_END(bp);
769 /********************************************************************************
770 * Default probe stub.
773 twed_probe(device_t dev)
778 /********************************************************************************
779 * Attach a unit to the controller.
782 twed_attach(device_t dev)
784 struct twed_softc *sc;
790 /* initialise our softc */
791 sc = device_get_softc(dev);
792 parent = device_get_parent(dev);
793 sc->twed_controller = (struct twe_softc *)device_get_softc(parent);
794 sc->twed_drive = device_get_ivars(dev);
797 /* report the drive */
798 twed_printf(sc, "%uMB (%u sectors)\n",
799 sc->twed_drive->td_size / ((1024 * 1024) / TWE_BLOCK_SIZE),
800 sc->twed_drive->td_size);
802 devstat_add_entry(&sc->twed_stats, "twed", device_get_unit(dev), TWE_BLOCK_SIZE,
803 DEVSTAT_NO_ORDERED_TAGS,
804 DEVSTAT_TYPE_STORARRAY | DEVSTAT_TYPE_IF_OTHER,
805 DEVSTAT_PRIORITY_ARRAY);
807 /* attach a generic disk device to ourselves */
808 dsk = disk_create(device_get_unit(dev), &sc->twed_disk, 0, &twed_cdevsw, &tweddisk_cdevsw);
810 dsk->si_drv2 = &sc->twed_drive->td_unit;
811 sc->twed_dev_t = dsk;
816 /* set the maximum I/O size to the theoretical maximum allowed by the S/G list size */
817 dsk->si_iosize_max = (TWE_MAX_SGL_LENGTH - 1) * PAGE_SIZE;
822 /********************************************************************************
823 * Disconnect ourselves from the system.
826 twed_detach(device_t dev)
828 struct twed_softc *sc = (struct twed_softc *)device_get_softc(dev);
832 if (sc->twed_flags & TWED_OPEN)
835 devstat_remove_entry(&sc->twed_stats);
837 if (--disks_registered == 0)
838 cdevsw_remove(&tweddisk_cdevsw);
840 disk_destroy(sc->twed_dev_t);
846 /********************************************************************************
847 ********************************************************************************
849 ********************************************************************************
850 ********************************************************************************/
852 static void twe_setup_data_dmamap(void *arg, bus_dma_segment_t *segs, int nsegments, int error);
853 static void twe_setup_request_dmamap(void *arg, bus_dma_segment_t *segs, int nsegments, int error);
855 /********************************************************************************
856 * Allocate a command buffer
858 MALLOC_DEFINE(TWE_MALLOC_CLASS, "twe commands", "twe commands");
861 twe_allocate_request(struct twe_softc *sc)
863 struct twe_request *tr;
865 if ((tr = malloc(sizeof(struct twe_request), TWE_MALLOC_CLASS, M_NOWAIT)) == NULL)
867 bzero(tr, sizeof(*tr));
869 if (bus_dmamap_create(sc->twe_buffer_dmat, 0, &tr->tr_cmdmap)) {
870 twe_free_request(tr);
873 if (bus_dmamap_create(sc->twe_buffer_dmat, 0, &tr->tr_dmamap)) {
874 bus_dmamap_destroy(sc->twe_buffer_dmat, tr->tr_cmdmap);
875 twe_free_request(tr);
881 /********************************************************************************
882 * Permanently discard a command buffer.
885 twe_free_request(struct twe_request *tr)
887 struct twe_softc *sc = tr->tr_sc;
891 bus_dmamap_destroy(sc->twe_buffer_dmat, tr->tr_cmdmap);
892 bus_dmamap_destroy(sc->twe_buffer_dmat, tr->tr_dmamap);
893 free(tr, TWE_MALLOC_CLASS);
896 /********************************************************************************
897 * Map/unmap (tr)'s command and data in the controller's addressable space.
899 * These routines ensure that the data which the controller is going to try to
900 * access is actually visible to the controller, in a machine-independant
901 * fashion. Due to a hardware limitation, I/O buffers must be 512-byte aligned
902 * and we take care of that here as well.
905 twe_setup_data_dmamap(void *arg, bus_dma_segment_t *segs, int nsegments, int error)
907 struct twe_request *tr = (struct twe_request *)arg;
908 TWE_Command *cmd = &tr->tr_command;
913 /* save base of first segment in command (applicable if there only one segment) */
914 tr->tr_dataphys = segs[0].ds_addr;
916 /* correct command size for s/g list size */
917 tr->tr_command.generic.size += 2 * nsegments;
920 * Due to the fact that parameter and I/O commands have the scatter/gather list in
921 * different places, we need to determine which sort of command this actually is
922 * before we can populate it correctly.
924 switch(cmd->generic.opcode) {
925 case TWE_OP_GET_PARAM:
926 case TWE_OP_SET_PARAM:
927 cmd->generic.sgl_offset = 2;
928 for (i = 0; i < nsegments; i++) {
929 cmd->param.sgl[i].address = segs[i].ds_addr;
930 cmd->param.sgl[i].length = segs[i].ds_len;
932 for (; i < TWE_MAX_SGL_LENGTH; i++) { /* XXX necessary? */
933 cmd->param.sgl[i].address = 0;
934 cmd->param.sgl[i].length = 0;
939 cmd->generic.sgl_offset = 3;
940 for (i = 0; i < nsegments; i++) {
941 cmd->io.sgl[i].address = segs[i].ds_addr;
942 cmd->io.sgl[i].length = segs[i].ds_len;
944 for (; i < TWE_MAX_SGL_LENGTH; i++) { /* XXX necessary? */
945 cmd->io.sgl[i].address = 0;
946 cmd->io.sgl[i].length = 0;
950 /* no s/g list, nothing to do */
955 twe_setup_request_dmamap(void *arg, bus_dma_segment_t *segs, int nsegments, int error)
957 struct twe_request *tr = (struct twe_request *)arg;
961 /* command can't cross a page boundary */
962 tr->tr_cmdphys = segs[0].ds_addr;
966 twe_map_request(struct twe_request *tr)
968 struct twe_softc *sc = tr->tr_sc;
974 * Map the command into bus space.
976 bus_dmamap_load(sc->twe_buffer_dmat, tr->tr_cmdmap, &tr->tr_command, sizeof(tr->tr_command),
977 twe_setup_request_dmamap, tr, 0);
978 bus_dmamap_sync(sc->twe_buffer_dmat, tr->tr_cmdmap, BUS_DMASYNC_PREWRITE);
981 * If the command involves data, map that too.
983 if (tr->tr_data != NULL) {
986 * Data must be 64-byte aligned; allocate a fixup buffer if it's not.
988 if (((vm_offset_t)tr->tr_data % TWE_ALIGNMENT) != 0) {
989 tr->tr_realdata = tr->tr_data; /* save pointer to 'real' data */
990 tr->tr_flags |= TWE_CMD_ALIGNBUF;
991 tr->tr_data = malloc(tr->tr_length, TWE_MALLOC_CLASS, M_NOWAIT); /* XXX check result here */
995 * Map the data buffer into bus space and build the s/g list.
997 bus_dmamap_load(sc->twe_buffer_dmat, tr->tr_dmamap, tr->tr_data, tr->tr_length,
998 twe_setup_data_dmamap, tr, 0);
999 if (tr->tr_flags & TWE_CMD_DATAIN)
1000 bus_dmamap_sync(sc->twe_buffer_dmat, tr->tr_dmamap, BUS_DMASYNC_PREREAD);
1001 if (tr->tr_flags & TWE_CMD_DATAOUT) {
1002 /* if we're using an alignment buffer, and we're writing data, copy the real data out */
1003 if (tr->tr_flags & TWE_CMD_ALIGNBUF)
1004 bcopy(tr->tr_realdata, tr->tr_data, tr->tr_length);
1005 bus_dmamap_sync(sc->twe_buffer_dmat, tr->tr_dmamap, BUS_DMASYNC_PREWRITE);
1011 twe_unmap_request(struct twe_request *tr)
1013 struct twe_softc *sc = tr->tr_sc;
1018 * Unmap the command from bus space.
1020 bus_dmamap_sync(sc->twe_buffer_dmat, tr->tr_cmdmap, BUS_DMASYNC_POSTWRITE);
1021 bus_dmamap_unload(sc->twe_buffer_dmat, tr->tr_cmdmap);
1024 * If the command involved data, unmap that too.
1026 if (tr->tr_data != NULL) {
1028 if (tr->tr_flags & TWE_CMD_DATAIN) {
1029 bus_dmamap_sync(sc->twe_buffer_dmat, tr->tr_dmamap, BUS_DMASYNC_POSTREAD);
1030 /* if we're using an alignment buffer, and we're reading data, copy the real data in */
1031 if (tr->tr_flags & TWE_CMD_ALIGNBUF)
1032 bcopy(tr->tr_data, tr->tr_realdata, tr->tr_length);
1034 if (tr->tr_flags & TWE_CMD_DATAOUT)
1035 bus_dmamap_sync(sc->twe_buffer_dmat, tr->tr_dmamap, BUS_DMASYNC_POSTWRITE);
1037 bus_dmamap_unload(sc->twe_buffer_dmat, tr->tr_dmamap);
1040 /* free alignment buffer if it was used */
1041 if (tr->tr_flags & TWE_CMD_ALIGNBUF) {
1042 free(tr->tr_data, TWE_MALLOC_CLASS);
1043 tr->tr_data = tr->tr_realdata; /* restore 'real' data pointer */
1048 /********************************************************************************
1049 * Print current controller status, call from DDB.
1054 struct twe_softc *sc;
1058 for (i = 0; (sc = devclass_get_softc(twe_devclass, i)) != NULL; i++)
1059 twe_print_controller(sc);
1060 printf("twed: total bio count in %u out %u\n", twed_bio_in, twed_bio_out);