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 $
28 * $DragonFly: src/sys/dev/raid/twe/twe_freebsd.c,v 1.12 2005/02/04 02:55:48 dillon Exp $
32 * FreeBSD-specific code.
35 #include <sys/param.h>
37 #include <machine/bus.h>
38 #include <machine/clock.h>
39 #include <machine/md_var.h>
42 #include "twe_compat.h"
46 #include "twe_tables.h"
48 #include <sys/devicestat.h>
50 static devclass_t twe_devclass;
53 static u_int32_t twed_bio_in;
54 #define TWED_BIO_IN twed_bio_in++
55 static u_int32_t twed_bio_out;
56 #define TWED_BIO_OUT twed_bio_out++
62 /********************************************************************************
63 ********************************************************************************
64 Control device interface
65 ********************************************************************************
66 ********************************************************************************/
68 static d_open_t twe_open;
69 static d_close_t twe_close;
70 static d_ioctl_t twe_ioctl_wrapper;
72 #define TWE_CDEV_MAJOR 146
74 static struct cdevsw twe_cdevsw = {
76 /* cmaj */ TWE_CDEV_MAJOR,
93 /********************************************************************************
94 * Accept an open operation on the control device.
97 twe_open(dev_t dev, int flags, int fmt, d_thread_t *td)
99 int unit = minor(dev);
100 struct twe_softc *sc = devclass_get_softc(twe_devclass, unit);
102 sc->twe_state |= TWE_STATE_OPEN;
106 /********************************************************************************
107 * Accept the last close on the control device.
110 twe_close(dev_t dev, int flags, int fmt, d_thread_t *td)
112 int unit = minor(dev);
113 struct twe_softc *sc = devclass_get_softc(twe_devclass, unit);
115 sc->twe_state &= ~TWE_STATE_OPEN;
119 /********************************************************************************
120 * Handle controller-specific control operations.
123 twe_ioctl_wrapper(dev_t dev, u_long cmd, caddr_t addr, int32_t flag, d_thread_t *td)
125 struct twe_softc *sc = (struct twe_softc *)dev->si_drv1;
127 return(twe_ioctl(sc, cmd, addr));
130 /********************************************************************************
131 ********************************************************************************
133 ********************************************************************************
134 ********************************************************************************/
136 static int twe_probe(device_t dev);
137 static int twe_attach(device_t dev);
138 static void twe_free(struct twe_softc *sc);
139 static int twe_detach(device_t dev);
140 static void twe_shutdown(device_t dev);
141 static int twe_suspend(device_t dev);
142 static int twe_resume(device_t dev);
143 static void twe_pci_intr(void *arg);
144 static void twe_intrhook(void *arg);
146 static device_method_t twe_methods[] = {
147 /* Device interface */
148 DEVMETHOD(device_probe, twe_probe),
149 DEVMETHOD(device_attach, twe_attach),
150 DEVMETHOD(device_detach, twe_detach),
151 DEVMETHOD(device_shutdown, twe_shutdown),
152 DEVMETHOD(device_suspend, twe_suspend),
153 DEVMETHOD(device_resume, twe_resume),
155 DEVMETHOD(bus_print_child, bus_generic_print_child),
156 DEVMETHOD(bus_driver_added, bus_generic_driver_added),
160 static driver_t twe_pci_driver = {
163 sizeof(struct twe_softc)
167 DRIVER_MODULE(Xtwe, pci, twe_pci_driver, twe_devclass, 0, 0);
169 DRIVER_MODULE(twe, pci, twe_pci_driver, twe_devclass, 0, 0);
172 /********************************************************************************
173 * Match a 3ware Escalade ATA RAID controller.
176 twe_probe(device_t dev)
181 if ((pci_get_vendor(dev) == TWE_VENDOR_ID) &&
182 ((pci_get_device(dev) == TWE_DEVICE_ID) ||
183 (pci_get_device(dev) == TWE_DEVICE_ID_ASIC))) {
184 device_set_desc(dev, TWE_DEVICE_NAME);
194 /********************************************************************************
195 * Allocate resources, initialise the controller.
198 twe_attach(device_t dev)
200 struct twe_softc *sc;
208 * Initialise the softc structure.
210 sc = device_get_softc(dev);
213 sysctl_ctx_init(&sc->sysctl_ctx);
214 sc->sysctl_tree = SYSCTL_ADD_NODE(&sc->sysctl_ctx,
215 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO,
216 device_get_nameunit(dev), CTLFLAG_RD, 0, "");
217 if (sc->sysctl_tree == NULL) {
218 twe_printf(sc, "cannot add sysctl tree node\n");
221 SYSCTL_ADD_STRING(&sc->sysctl_ctx, SYSCTL_CHILDREN(sc->sysctl_tree),
222 OID_AUTO, "driver_version", CTLFLAG_RD, "$Revision$", 0,
223 "TWE driver version");
226 * Make sure we are going to be able to talk to this board.
228 command = pci_read_config(dev, PCIR_COMMAND, 2);
229 if ((command & PCIM_CMD_PORTEN) == 0) {
230 twe_printf(sc, "register window not available\n");
234 * Force the busmaster enable bit on, in case the BIOS forgot.
236 command |= PCIM_CMD_BUSMASTEREN;
237 pci_write_config(dev, PCIR_COMMAND, command, 2);
240 * Allocate the PCI register window.
242 rid = TWE_IO_CONFIG_REG;
243 if ((sc->twe_io = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 0, ~0, 1, RF_ACTIVE)) == NULL) {
244 twe_printf(sc, "can't allocate register window\n");
248 sc->twe_btag = rman_get_bustag(sc->twe_io);
249 sc->twe_bhandle = rman_get_bushandle(sc->twe_io);
252 * Allocate the parent bus DMA tag appropriate for PCI.
254 if (bus_dma_tag_create(NULL, /* parent */
255 1, 0, /* alignment, boundary */
256 BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
257 BUS_SPACE_MAXADDR, /* highaddr */
258 NULL, NULL, /* filter, filterarg */
259 MAXBSIZE, TWE_MAX_SGL_LENGTH, /* maxsize, nsegments */
260 BUS_SPACE_MAXSIZE_32BIT, /* maxsegsize */
261 BUS_DMA_ALLOCNOW, /* flags */
262 &sc->twe_parent_dmat)) {
263 twe_printf(sc, "can't allocate parent DMA tag\n");
269 * Allocate and connect our interrupt.
272 if ((sc->twe_irq = bus_alloc_resource(sc->twe_dev, SYS_RES_IRQ, &rid, 0, ~0, 1, RF_SHAREABLE | RF_ACTIVE)) == NULL) {
273 twe_printf(sc, "can't allocate interrupt\n");
277 if (bus_setup_intr(sc->twe_dev, sc->twe_irq, INTR_TYPE_BIO | INTR_ENTROPY, twe_pci_intr, sc, &sc->twe_intr)) {
278 twe_printf(sc, "can't set up interrupt\n");
284 * Create DMA tag for mapping objects into controller-addressable space.
286 if (bus_dma_tag_create(sc->twe_parent_dmat, /* parent */
287 1, 0, /* alignment, boundary */
288 BUS_SPACE_MAXADDR, /* lowaddr */
289 BUS_SPACE_MAXADDR, /* highaddr */
290 NULL, NULL, /* filter, filterarg */
291 MAXBSIZE, TWE_MAX_SGL_LENGTH,/* maxsize, nsegments */
292 BUS_SPACE_MAXSIZE_32BIT, /* maxsegsize */
294 &sc->twe_buffer_dmat)) {
295 twe_printf(sc, "can't allocate data buffer DMA tag\n");
301 * Initialise the controller and driver core.
303 if ((error = twe_setup(sc)))
307 * Print some information about the controller and configuration.
309 twe_describe_controller(sc);
312 * Create the control device.
314 cdevsw_add(&twe_cdevsw, -1, device_get_unit(sc->twe_dev));
315 xdev = make_dev(&twe_cdevsw, device_get_unit(sc->twe_dev),
316 UID_ROOT, GID_OPERATOR, S_IRUSR | S_IWUSR,
317 "twe%d", device_get_unit(sc->twe_dev));
321 * Schedule ourselves to bring the controller up once interrupts are available.
322 * This isn't strictly necessary, since we disable interrupts while probing the
323 * controller, but it is more in keeping with common practice for other disk
326 sc->twe_ich.ich_func = twe_intrhook;
327 sc->twe_ich.ich_arg = sc;
328 sc->twe_ich.ich_desc = "twe";
329 if (config_intrhook_establish(&sc->twe_ich) != 0) {
330 twe_printf(sc, "can't establish configuration hook\n");
338 /********************************************************************************
339 * Free all of the resources associated with (sc).
341 * Should not be called if the controller is active.
344 twe_free(struct twe_softc *sc)
346 struct twe_request *tr;
350 /* throw away any command buffers */
351 while ((tr = twe_dequeue_free(sc)) != NULL)
352 twe_free_request(tr);
354 /* destroy the data-transfer DMA tag */
355 if (sc->twe_buffer_dmat)
356 bus_dma_tag_destroy(sc->twe_buffer_dmat);
358 /* disconnect the interrupt handler */
360 bus_teardown_intr(sc->twe_dev, sc->twe_irq, sc->twe_intr);
361 if (sc->twe_irq != NULL)
362 bus_release_resource(sc->twe_dev, SYS_RES_IRQ, 0, sc->twe_irq);
364 /* destroy the parent DMA tag */
365 if (sc->twe_parent_dmat)
366 bus_dma_tag_destroy(sc->twe_parent_dmat);
368 /* release the register window mapping */
369 if (sc->twe_io != NULL)
370 bus_release_resource(sc->twe_dev, SYS_RES_IOPORT, TWE_IO_CONFIG_REG, sc->twe_io);
372 cdevsw_remove(&twe_cdevsw, -1, device_get_unit(sc->twe_dev));
374 sysctl_ctx_free(&sc->sysctl_ctx);
377 /********************************************************************************
378 * Disconnect from the controller completely, in preparation for unload.
381 twe_detach(device_t dev)
383 struct twe_softc *sc = device_get_softc(dev);
390 if (sc->twe_state & TWE_STATE_OPEN)
394 * Shut the controller down.
406 /********************************************************************************
407 * Bring the controller down to a dormant state and detach all child devices.
409 * Note that we can assume that the bioq on the controller is empty, as we won't
410 * allow shutdown if any device is open.
413 twe_shutdown(device_t dev)
415 struct twe_softc *sc = device_get_softc(dev);
423 * Delete all our child devices.
425 for (i = 0; i < TWE_MAX_UNITS; i++) {
426 twe_detach_drive(sc, i);
430 * Bring the controller down.
437 /********************************************************************************
438 * Bring the controller to a quiescent state, ready for system suspend.
441 twe_suspend(device_t dev)
443 struct twe_softc *sc = device_get_softc(dev);
449 sc->twe_state |= TWE_STATE_SUSPEND;
451 twe_disable_interrupts(sc);
457 /********************************************************************************
458 * Bring the controller back to a state ready for operation.
461 twe_resume(device_t dev)
463 struct twe_softc *sc = device_get_softc(dev);
467 sc->twe_state &= ~TWE_STATE_SUSPEND;
468 twe_enable_interrupts(sc);
473 /*******************************************************************************
474 * Take an interrupt, or be poked by other code to look for interrupt-worthy
478 twe_pci_intr(void *arg)
480 twe_intr((struct twe_softc *)arg);
483 /********************************************************************************
484 * Delayed-startup hook
487 twe_intrhook(void *arg)
489 struct twe_softc *sc = (struct twe_softc *)arg;
491 /* pull ourselves off the intrhook chain */
492 config_intrhook_disestablish(&sc->twe_ich);
494 /* call core startup routine */
498 /********************************************************************************
499 * Given a detected drive, attach it to the bio interface.
501 * This is called from twe_add_unit.
504 twe_attach_drive(struct twe_softc *sc, struct twe_drive *dr)
509 dr->td_disk = device_add_child(sc->twe_dev, NULL, -1);
510 if (dr->td_disk == NULL) {
511 twe_printf(sc, "device_add_child failed\n");
514 device_set_ivars(dr->td_disk, dr);
517 * XXX It would make sense to test the online/initialising bits, but they seem to be
520 sprintf(buf, "Unit %d, %s, %s",
522 twe_describe_code(twe_table_unittype, dr->td_type),
523 twe_describe_code(twe_table_unitstate, dr->td_state & TWE_PARAM_UNITSTATUS_MASK));
524 device_set_desc_copy(dr->td_disk, buf);
526 if ((error = bus_generic_attach(sc->twe_dev)) != 0)
527 twe_printf(sc, "bus_generic_attach returned %d\n", error);
530 /********************************************************************************
531 * Detach the specified unit if it exsists
533 * This is called from twe_del_unit.
536 twe_detach_drive(struct twe_softc *sc, int unit)
539 if (sc->twe_drive[unit].td_disk != 0) {
540 if (device_delete_child(sc->twe_dev, sc->twe_drive[unit].td_disk) != 0)
541 twe_printf(sc, "failed to delete unit %d\n", unit);
542 sc->twe_drive[unit].td_disk = 0;
546 /********************************************************************************
547 * Clear a PCI parity error.
550 twe_clear_pci_parity_error(struct twe_softc *sc)
552 TWE_CONTROL(sc, TWE_CONTROL_CLEAR_PARITY_ERROR);
553 pci_write_config(sc->twe_dev, PCIR_STATUS, TWE_PCI_CLEAR_PARITY_ERROR, 2);
556 /********************************************************************************
560 twe_clear_pci_abort(struct twe_softc *sc)
562 TWE_CONTROL(sc, TWE_CONTROL_CLEAR_PCI_ABORT);
563 pci_write_config(sc->twe_dev, PCIR_STATUS, TWE_PCI_CLEAR_PCI_ABORT, 2);
566 /********************************************************************************
567 ********************************************************************************
569 ********************************************************************************
570 ********************************************************************************/
579 struct twe_softc *twed_controller; /* parent device softc */
580 struct twe_drive *twed_drive; /* drive data in parent softc */
581 struct disk twed_disk; /* generic disk handle */
582 struct devstat twed_stats; /* accounting */
583 struct disklabel twed_label; /* synthetic label */
585 #define TWED_OPEN (1<<0) /* drive is open (can't shut down) */
589 * Disk device bus interface
591 static int twed_probe(device_t dev);
592 static int twed_attach(device_t dev);
593 static int twed_detach(device_t dev);
595 static device_method_t twed_methods[] = {
596 DEVMETHOD(device_probe, twed_probe),
597 DEVMETHOD(device_attach, twed_attach),
598 DEVMETHOD(device_detach, twed_detach),
602 static driver_t twed_driver = {
605 sizeof(struct twed_softc)
608 static devclass_t twed_devclass;
610 DRIVER_MODULE(Xtwed, Xtwe, twed_driver, twed_devclass, 0, 0);
612 DRIVER_MODULE(twed, twe, twed_driver, twed_devclass, 0, 0);
616 * Disk device control interface.
618 static d_open_t twed_open;
619 static d_close_t twed_close;
620 static d_strategy_t twed_strategy;
621 static d_dump_t twed_dump;
623 #define TWED_CDEV_MAJOR 147
625 static struct cdevsw twed_cdevsw = {
644 /********************************************************************************
645 * Handle open from generic layer.
647 * Note that this is typically only called by the diskslice code, and not
648 * for opens on subdevices (eg. slices, partitions).
651 twed_open(dev_t dev, int flags, int fmt, d_thread_t *td)
653 struct twed_softc *sc = (struct twed_softc *)dev->si_drv1;
654 struct disklabel *label;
661 /* check that the controller is up and running */
662 if (sc->twed_controller->twe_state & TWE_STATE_SHUTDOWN)
665 /* build synthetic label */
666 label = &sc->twed_disk.d_label;
667 bzero(label, sizeof(*label));
668 label->d_type = DTYPE_ESDI;
669 label->d_secsize = TWE_BLOCK_SIZE;
670 label->d_nsectors = sc->twed_drive->td_sectors;
671 label->d_ntracks = sc->twed_drive->td_heads;
672 label->d_ncylinders = sc->twed_drive->td_cylinders;
673 label->d_secpercyl = sc->twed_drive->td_sectors * sc->twed_drive->td_heads;
674 label->d_secperunit = sc->twed_drive->td_size;
676 sc->twed_flags |= TWED_OPEN;
680 /********************************************************************************
681 * Handle last close of the disk device.
684 twed_close(dev_t dev, int flags, int fmt, d_thread_t *td)
686 struct twed_softc *sc = (struct twed_softc *)dev->si_drv1;
693 sc->twed_flags &= ~TWED_OPEN;
697 /********************************************************************************
698 * Handle an I/O request.
701 twed_strategy(twe_bio *bp)
703 struct twed_softc *sc = (struct twed_softc *)TWE_BIO_SOFTC(bp);
711 TWE_BIO_SET_ERROR(bp, EINVAL);
712 printf("twe: bio for invalid disk!\n");
718 /* perform accounting */
719 TWE_BIO_STATS_START(bp);
721 /* queue the bio on the controller */
722 twe_enqueue_bio(sc->twed_controller, bp);
724 /* poke the controller to start I/O */
725 twe_startio(sc->twed_controller);
729 /********************************************************************************
730 * System crashdump support
733 twed_dump(dev_t dev, u_int count, u_int blkno, u_int secsize)
735 struct twed_softc *twed_sc = (struct twed_softc *)dev->si_drv1;
736 struct twe_softc *twe_sc = (struct twe_softc *)twed_sc->twed_controller;
739 int dumppages = MAXDUMPPGS;
743 if (!twed_sc || !twe_sc)
746 blkcnt = howmany(PAGE_SIZE, secsize);
751 if ((count / blkcnt) < dumppages)
752 dumppages = count / blkcnt;
754 for (i = 0; i < dumppages; ++i) {
755 vm_paddr_t a = addr + (i * PAGE_SIZE);
756 if (is_physical_memory(a))
757 va = pmap_kenter_temporary(trunc_page(a), i);
759 va = pmap_kenter_temporary(trunc_page(0), i);
762 if ((error = twe_dump_blocks(twe_sc, twed_sc->twed_drive->td_unit, blkno, va,
763 (PAGE_SIZE * dumppages) / TWE_BLOCK_SIZE)) != 0)
767 if (dumpstatus(addr, (off_t)count * DEV_BSIZE) < 0)
770 blkno += blkcnt * dumppages;
771 count -= blkcnt * dumppages;
772 addr += PAGE_SIZE * dumppages;
777 /********************************************************************************
778 * Handle completion of an I/O request.
781 twed_intr(twe_bio *bp)
785 /* if no error, transfer completed */
786 if (!TWE_BIO_HAS_ERROR(bp))
787 TWE_BIO_RESID(bp) = 0;
789 TWE_BIO_STATS_END(bp);
794 /********************************************************************************
795 * Default probe stub.
798 twed_probe(device_t dev)
803 /********************************************************************************
804 * Attach a unit to the controller.
807 twed_attach(device_t dev)
809 struct twed_softc *sc;
815 /* initialise our softc */
816 sc = device_get_softc(dev);
817 parent = device_get_parent(dev);
818 sc->twed_controller = (struct twe_softc *)device_get_softc(parent);
819 sc->twed_drive = device_get_ivars(dev);
822 /* report the drive */
823 twed_printf(sc, "%uMB (%u sectors)\n",
824 sc->twed_drive->td_size / ((1024 * 1024) / TWE_BLOCK_SIZE),
825 sc->twed_drive->td_size);
827 devstat_add_entry(&sc->twed_stats, "twed", device_get_unit(dev), TWE_BLOCK_SIZE,
828 DEVSTAT_NO_ORDERED_TAGS,
829 DEVSTAT_TYPE_STORARRAY | DEVSTAT_TYPE_IF_OTHER,
830 DEVSTAT_PRIORITY_ARRAY);
832 /* attach a generic disk device to ourselves */
833 dsk = disk_create(device_get_unit(dev), &sc->twed_disk, 0, &twed_cdevsw);
835 dsk->si_drv2 = &sc->twed_drive->td_unit;
836 sc->twed_dev_t = dsk;
838 /* set the maximum I/O size to the theoretical maximum allowed by the S/G list size */
839 dsk->si_iosize_max = (TWE_MAX_SGL_LENGTH - 1) * PAGE_SIZE;
844 /********************************************************************************
845 * Disconnect ourselves from the system.
848 twed_detach(device_t dev)
850 struct twed_softc *sc = (struct twed_softc *)device_get_softc(dev);
854 if (sc->twed_flags & TWED_OPEN)
857 devstat_remove_entry(&sc->twed_stats);
858 disk_destroy(&sc->twed_disk);
863 /********************************************************************************
864 ********************************************************************************
866 ********************************************************************************
867 ********************************************************************************/
869 static void twe_setup_data_dmamap(void *arg, bus_dma_segment_t *segs, int nsegments, int error);
870 static void twe_setup_request_dmamap(void *arg, bus_dma_segment_t *segs, int nsegments, int error);
872 /********************************************************************************
873 * Malloc space for a command buffer.
875 MALLOC_DEFINE(TWE_MALLOC_CLASS, "twe commands", "twe commands");
878 twe_allocate_request(struct twe_softc *sc)
880 struct twe_request *tr;
884 * TWE requires requests to be 512-byte aligned. Depend on malloc()
885 * guarenteeing alignment for power-of-2 requests. Note that the old
886 * (FreeBSD-4.x) malloc code aligned all requests, but the new slab
887 * allocator only guarentees same-size alignment for power-of-2 requests.
889 aligned_size = (sizeof(struct twe_request) + TWE_ALIGNMASK) &
891 tr = malloc(aligned_size, TWE_MALLOC_CLASS, M_INTWAIT|M_ZERO);
893 if (bus_dmamap_create(sc->twe_buffer_dmat, 0, &tr->tr_cmdmap)) {
894 twe_free_request(tr);
897 if (bus_dmamap_create(sc->twe_buffer_dmat, 0, &tr->tr_dmamap)) {
898 bus_dmamap_destroy(sc->twe_buffer_dmat, tr->tr_cmdmap);
899 twe_free_request(tr);
905 /********************************************************************************
906 * Permanently discard a command buffer.
909 twe_free_request(struct twe_request *tr)
911 struct twe_softc *sc = tr->tr_sc;
915 bus_dmamap_destroy(sc->twe_buffer_dmat, tr->tr_cmdmap);
916 bus_dmamap_destroy(sc->twe_buffer_dmat, tr->tr_dmamap);
917 free(tr, TWE_MALLOC_CLASS);
920 /********************************************************************************
921 * Map/unmap (tr)'s command and data in the controller's addressable space.
923 * These routines ensure that the data which the controller is going to try to
924 * access is actually visible to the controller, in a machine-independant
925 * fashion. Due to a hardware limitation, I/O buffers must be 512-byte aligned
926 * and we take care of that here as well.
929 twe_fillin_sgl(TWE_SG_Entry *sgl, bus_dma_segment_t *segs, int nsegments, int max_sgl)
933 for (i = 0; i < nsegments; i++) {
934 sgl[i].address = segs[i].ds_addr;
935 sgl[i].length = segs[i].ds_len;
937 for (; i < max_sgl; i++) { /* XXX necessary? */
944 twe_setup_data_dmamap(void *arg, bus_dma_segment_t *segs, int nsegments, int error)
946 struct twe_request *tr = (struct twe_request *)arg;
947 TWE_Command *cmd = &tr->tr_command;
951 /* save base of first segment in command (applicable if there only one segment) */
952 tr->tr_dataphys = segs[0].ds_addr;
954 /* correct command size for s/g list size */
955 tr->tr_command.generic.size += 2 * nsegments;
958 * Due to the fact that parameter and I/O commands have the scatter/gather list in
959 * different places, we need to determine which sort of command this actually is
960 * before we can populate it correctly.
962 switch(cmd->generic.opcode) {
963 case TWE_OP_GET_PARAM:
964 case TWE_OP_SET_PARAM:
965 cmd->generic.sgl_offset = 2;
966 twe_fillin_sgl(&cmd->param.sgl[0], segs, nsegments, TWE_MAX_SGL_LENGTH);
970 cmd->generic.sgl_offset = 3;
971 twe_fillin_sgl(&cmd->io.sgl[0], segs, nsegments, TWE_MAX_SGL_LENGTH);
973 case TWE_OP_ATA_PASSTHROUGH:
974 cmd->generic.sgl_offset = 5;
975 twe_fillin_sgl(&cmd->ata.sgl[0], segs, nsegments, TWE_MAX_ATA_SGL_LENGTH);
979 * Fall back to what the linux driver does.
980 * Do this because the API may send an opcode
981 * the driver knows nothing about and this will
982 * at least stop PCIABRT's from hosing us.
984 switch (cmd->generic.sgl_offset) {
986 twe_fillin_sgl(&cmd->param.sgl[0], segs, nsegments, TWE_MAX_SGL_LENGTH);
989 twe_fillin_sgl(&cmd->io.sgl[0], segs, nsegments, TWE_MAX_SGL_LENGTH);
992 twe_fillin_sgl(&cmd->ata.sgl[0], segs, nsegments, TWE_MAX_ATA_SGL_LENGTH);
999 twe_setup_request_dmamap(void *arg, bus_dma_segment_t *segs, int nsegments, int error)
1001 struct twe_request *tr = (struct twe_request *)arg;
1005 /* command can't cross a page boundary */
1006 tr->tr_cmdphys = segs[0].ds_addr;
1010 twe_map_request(struct twe_request *tr)
1012 struct twe_softc *sc = tr->tr_sc;
1018 * Map the command into bus space.
1020 bus_dmamap_load(sc->twe_buffer_dmat, tr->tr_cmdmap, &tr->tr_command, sizeof(tr->tr_command),
1021 twe_setup_request_dmamap, tr, 0);
1022 bus_dmamap_sync(sc->twe_buffer_dmat, tr->tr_cmdmap, BUS_DMASYNC_PREWRITE);
1025 * If the command involves data, map that too.
1027 if (tr->tr_data != NULL) {
1030 * Data must be 512-byte aligned; allocate a fixup buffer if it's not.
1032 if (((vm_offset_t)tr->tr_data % TWE_ALIGNMENT) != 0) {
1035 aligned_size = (tr->tr_length + TWE_ALIGNMASK) & ~TWE_ALIGNMASK;
1036 /* save pointer to 'real' data */
1037 tr->tr_realdata = tr->tr_data;
1038 tr->tr_flags |= TWE_CMD_ALIGNBUF;
1039 tr->tr_data = malloc(aligned_size, TWE_MALLOC_CLASS, M_INTWAIT);
1043 * Map the data buffer into bus space and build the s/g list.
1045 bus_dmamap_load(sc->twe_buffer_dmat, tr->tr_dmamap, tr->tr_data, tr->tr_length,
1046 twe_setup_data_dmamap, tr, 0);
1047 if (tr->tr_flags & TWE_CMD_DATAIN)
1048 bus_dmamap_sync(sc->twe_buffer_dmat, tr->tr_dmamap, BUS_DMASYNC_PREREAD);
1049 if (tr->tr_flags & TWE_CMD_DATAOUT) {
1050 /* if we're using an alignment buffer, and we're writing data, copy the real data out */
1051 if (tr->tr_flags & TWE_CMD_ALIGNBUF)
1052 bcopy(tr->tr_realdata, tr->tr_data, tr->tr_length);
1053 bus_dmamap_sync(sc->twe_buffer_dmat, tr->tr_dmamap, BUS_DMASYNC_PREWRITE);
1059 twe_unmap_request(struct twe_request *tr)
1061 struct twe_softc *sc = tr->tr_sc;
1066 * Unmap the command from bus space.
1068 bus_dmamap_sync(sc->twe_buffer_dmat, tr->tr_cmdmap, BUS_DMASYNC_POSTWRITE);
1069 bus_dmamap_unload(sc->twe_buffer_dmat, tr->tr_cmdmap);
1072 * If the command involved data, unmap that too.
1074 if (tr->tr_data != NULL) {
1076 if (tr->tr_flags & TWE_CMD_DATAIN) {
1077 bus_dmamap_sync(sc->twe_buffer_dmat, tr->tr_dmamap, BUS_DMASYNC_POSTREAD);
1078 /* if we're using an alignment buffer, and we're reading data, copy the real data in */
1079 if (tr->tr_flags & TWE_CMD_ALIGNBUF)
1080 bcopy(tr->tr_data, tr->tr_realdata, tr->tr_length);
1082 if (tr->tr_flags & TWE_CMD_DATAOUT)
1083 bus_dmamap_sync(sc->twe_buffer_dmat, tr->tr_dmamap, BUS_DMASYNC_POSTWRITE);
1085 bus_dmamap_unload(sc->twe_buffer_dmat, tr->tr_dmamap);
1088 /* free alignment buffer if it was used */
1089 if (tr->tr_flags & TWE_CMD_ALIGNBUF) {
1090 free(tr->tr_data, TWE_MALLOC_CLASS);
1091 tr->tr_data = tr->tr_realdata; /* restore 'real' data pointer */
1096 /********************************************************************************
1097 * Print current controller status, call from DDB.
1102 struct twe_softc *sc;
1106 for (i = 0; (sc = devclass_get_softc(twe_devclass, i)) != NULL; i++)
1107 twe_print_controller(sc);
1108 printf("twed: total bio count in %u out %u\n", twed_bio_in, twed_bio_out);