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_freebsd.c,v 1.2.2.9 2004/06/11 18:57:31 vkashyap Exp $
30 * $DragonFly: src/sys/dev/raid/twe/twe_freebsd.c,v 1.27 2007/06/17 23:50:16 dillon Exp $
34 * FreeBSD-specific code.
37 #include <dev/raid/twe/twe_compat.h>
38 #include <dev/raid/twe/twereg.h>
39 #include <dev/raid/twe/twe_tables.h>
40 #include <dev/raid/twe/tweio.h>
41 #include <dev/raid/twe/twevar.h>
42 #include <sys/dtype.h>
44 static devclass_t twe_devclass;
47 static u_int32_t twed_bio_in;
48 #define TWED_BIO_IN twed_bio_in++
49 static u_int32_t twed_bio_out;
50 #define TWED_BIO_OUT twed_bio_out++
56 /********************************************************************************
57 ********************************************************************************
58 Control device interface
59 ********************************************************************************
60 ********************************************************************************/
62 static d_open_t twe_open;
63 static d_close_t twe_close;
64 static d_ioctl_t twe_ioctl_wrapper;
66 static struct dev_ops twe_ops = {
67 { "twe", TWE_CDEV_MAJOR, 0 },
70 .d_ioctl = twe_ioctl_wrapper,
73 /********************************************************************************
74 * Accept an open operation on the control device.
77 twe_open(struct dev_open_args *ap)
79 cdev_t dev = ap->a_head.a_dev;
80 int unit = minor(dev);
81 struct twe_softc *sc = devclass_get_softc(twe_devclass, unit);
83 sc->twe_state |= TWE_STATE_OPEN;
87 /********************************************************************************
88 * Accept the last close on the control device.
91 twe_close(struct dev_close_args *ap)
93 cdev_t dev = ap->a_head.a_dev;
94 int unit = minor(dev);
95 struct twe_softc *sc = devclass_get_softc(twe_devclass, unit);
97 sc->twe_state &= ~TWE_STATE_OPEN;
101 /********************************************************************************
102 * Handle controller-specific control operations.
105 twe_ioctl_wrapper(struct dev_ioctl_args *ap)
107 cdev_t dev = ap->a_head.a_dev;
108 struct twe_softc *sc = (struct twe_softc *)dev->si_drv1;
110 return(twe_ioctl(sc, ap->a_cmd, ap->a_data));
113 /********************************************************************************
114 ********************************************************************************
116 ********************************************************************************
117 ********************************************************************************/
119 static int twe_probe(device_t dev);
120 static int twe_attach(device_t dev);
121 static void twe_free(struct twe_softc *sc);
122 static int twe_detach(device_t dev);
123 static int twe_shutdown(device_t dev);
124 static int twe_suspend(device_t dev);
125 static int twe_resume(device_t dev);
126 static void twe_pci_intr(void *arg);
127 static void twe_intrhook(void *arg);
128 static void twe_free_request(struct twe_request *tr);
129 static void twe_setup_data_dmamap(void *arg, bus_dma_segment_t *segs,
130 int nsegments, int error);
131 static void twe_setup_request_dmamap(void *arg, bus_dma_segment_t *segs,
132 int nsegments, int error);
134 static device_method_t twe_methods[] = {
135 /* Device interface */
136 DEVMETHOD(device_probe, twe_probe),
137 DEVMETHOD(device_attach, twe_attach),
138 DEVMETHOD(device_detach, twe_detach),
139 DEVMETHOD(device_shutdown, twe_shutdown),
140 DEVMETHOD(device_suspend, twe_suspend),
141 DEVMETHOD(device_resume, twe_resume),
143 DEVMETHOD(bus_print_child, bus_generic_print_child),
144 DEVMETHOD(bus_driver_added, bus_generic_driver_added),
148 static driver_t twe_pci_driver = {
151 sizeof(struct twe_softc)
155 DRIVER_MODULE(Xtwe, pci, twe_pci_driver, twe_devclass, 0, 0);
157 DRIVER_MODULE(twe, pci, twe_pci_driver, twe_devclass, 0, 0);
160 /********************************************************************************
161 * Match a 3ware Escalade ATA RAID controller.
164 twe_probe(device_t dev)
169 if ((pci_get_vendor(dev) == TWE_VENDOR_ID) &&
170 ((pci_get_device(dev) == TWE_DEVICE_ID) ||
171 (pci_get_device(dev) == TWE_DEVICE_ID_ASIC))) {
172 device_set_desc(dev, TWE_DEVICE_NAME " driver ver. " TWE_DRIVER_VERSION_STRING);
182 /********************************************************************************
183 * Allocate resources, initialise the controller.
186 twe_attach(device_t dev)
188 struct twe_softc *sc;
195 * Initialise the softc structure.
197 sc = device_get_softc(dev);
200 sysctl_ctx_init(&sc->sysctl_ctx);
201 sc->sysctl_tree = SYSCTL_ADD_NODE(&sc->sysctl_ctx,
202 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO,
203 device_get_nameunit(dev), CTLFLAG_RD, 0, "");
204 if (sc->sysctl_tree == NULL) {
205 twe_printf(sc, "cannot add sysctl tree node\n");
208 SYSCTL_ADD_STRING(&sc->sysctl_ctx, SYSCTL_CHILDREN(sc->sysctl_tree),
209 OID_AUTO, "driver_version", CTLFLAG_RD, TWE_DRIVER_VERSION_STRING, 0,
210 "TWE driver version");
213 * Make sure we are going to be able to talk to this board.
215 command = pci_read_config(dev, PCIR_COMMAND, 2);
216 if ((command & PCIM_CMD_PORTEN) == 0) {
217 twe_printf(sc, "register window not available\n");
221 * Force the busmaster enable bit on, in case the BIOS forgot.
223 command |= PCIM_CMD_BUSMASTEREN;
224 pci_write_config(dev, PCIR_COMMAND, command, 2);
227 * Allocate the PCI register window.
229 rid = TWE_IO_CONFIG_REG;
230 if ((sc->twe_io = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 0, ~0, 1, RF_ACTIVE)) == NULL) {
231 twe_printf(sc, "can't allocate register window\n");
235 sc->twe_btag = rman_get_bustag(sc->twe_io);
236 sc->twe_bhandle = rman_get_bushandle(sc->twe_io);
239 * Allocate the parent bus DMA tag appropriate for PCI.
241 if (bus_dma_tag_create(NULL, /* parent */
242 1, 0, /* alignment, boundary */
243 BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
244 BUS_SPACE_MAXADDR, /* highaddr */
245 NULL, NULL, /* filter, filterarg */
246 MAXBSIZE, TWE_MAX_SGL_LENGTH, /* maxsize, nsegments */
247 BUS_SPACE_MAXSIZE_32BIT, /* maxsegsize */
248 BUS_DMA_ALLOCNOW, /* flags */
249 &sc->twe_parent_dmat)) {
250 twe_printf(sc, "can't allocate parent DMA tag\n");
256 * Allocate and connect our interrupt.
259 if ((sc->twe_irq = bus_alloc_resource(sc->twe_dev, SYS_RES_IRQ, &rid, 0, ~0, 1, RF_SHAREABLE | RF_ACTIVE)) == NULL) {
260 twe_printf(sc, "can't allocate interrupt\n");
264 if (bus_setup_intr(sc->twe_dev, sc->twe_irq, 0,
265 twe_pci_intr, sc, &sc->twe_intr, NULL)) {
266 twe_printf(sc, "can't set up interrupt\n");
272 * Create DMA tag for mapping objects into controller-addressable space.
274 if (bus_dma_tag_create(sc->twe_parent_dmat, /* parent */
275 1, 0, /* alignment, boundary */
276 BUS_SPACE_MAXADDR, /* lowaddr */
277 BUS_SPACE_MAXADDR, /* highaddr */
278 NULL, NULL, /* filter, filterarg */
279 MAXBSIZE, TWE_MAX_SGL_LENGTH,/* maxsize, nsegments */
280 BUS_SPACE_MAXSIZE_32BIT, /* maxsegsize */
282 &sc->twe_buffer_dmat)) {
283 twe_printf(sc, "can't allocate data buffer DMA tag\n");
289 * Initialise the controller and driver core.
291 if ((error = twe_setup(sc))) {
297 * Print some information about the controller and configuration.
299 twe_describe_controller(sc);
302 * Create the control device.
304 dev_ops_add(&twe_ops, -1, device_get_unit(sc->twe_dev));
305 sc->twe_dev_t = make_dev(&twe_ops, device_get_unit(sc->twe_dev),
306 UID_ROOT, GID_OPERATOR, S_IRUSR | S_IWUSR, "twe%d",
307 device_get_unit(sc->twe_dev));
308 sc->twe_dev_t->si_drv1 = sc;
310 * Schedule ourselves to bring the controller up once interrupts are available.
311 * This isn't strictly necessary, since we disable interrupts while probing the
312 * controller, but it is more in keeping with common practice for other disk
315 sc->twe_ich.ich_func = twe_intrhook;
316 sc->twe_ich.ich_arg = sc;
317 if (config_intrhook_establish(&sc->twe_ich) != 0) {
318 twe_printf(sc, "can't establish configuration hook\n");
326 /********************************************************************************
327 * Free all of the resources associated with (sc).
329 * Should not be called if the controller is active.
332 twe_free(struct twe_softc *sc)
334 struct twe_request *tr;
338 /* throw away any command buffers */
339 while ((tr = twe_dequeue_free(sc)) != NULL)
340 twe_free_request(tr);
342 /* destroy the data-transfer DMA tag */
343 if (sc->twe_buffer_dmat)
344 bus_dma_tag_destroy(sc->twe_buffer_dmat);
346 /* disconnect the interrupt handler */
348 bus_teardown_intr(sc->twe_dev, sc->twe_irq, sc->twe_intr);
349 if (sc->twe_irq != NULL)
350 bus_release_resource(sc->twe_dev, SYS_RES_IRQ, 0, sc->twe_irq);
352 /* destroy the parent DMA tag */
353 if (sc->twe_parent_dmat)
354 bus_dma_tag_destroy(sc->twe_parent_dmat);
356 /* release the register window mapping */
357 if (sc->twe_io != NULL)
358 bus_release_resource(sc->twe_dev, SYS_RES_IOPORT, TWE_IO_CONFIG_REG, sc->twe_io);
360 dev_ops_remove(&twe_ops, -1, device_get_unit(sc->twe_dev));
361 /* destroy control device */
362 if (sc->twe_dev_t != (cdev_t)NULL)
363 destroy_dev(sc->twe_dev_t);
365 sysctl_ctx_free(&sc->sysctl_ctx);
368 /********************************************************************************
369 * Disconnect from the controller completely, in preparation for unload.
372 twe_detach(device_t dev)
374 struct twe_softc *sc = device_get_softc(dev);
381 if (sc->twe_state & TWE_STATE_OPEN)
385 * Shut the controller down.
387 if ((error = twe_shutdown(dev)))
398 /********************************************************************************
399 * Bring the controller down to a dormant state and detach all child devices.
401 * Note that we can assume that the bioq on the controller is empty, as we won't
402 * allow shutdown if any device is open.
405 twe_shutdown(device_t dev)
407 struct twe_softc *sc = device_get_softc(dev);
415 * Delete all our child devices.
417 for (i = 0; i < TWE_MAX_UNITS; i++) {
418 if (sc->twe_drive[i].td_disk != 0)
419 if ((error = twe_detach_drive(sc, i)) != 0)
424 * Bring the controller down.
433 /********************************************************************************
434 * Bring the controller to a quiescent state, ready for system suspend.
437 twe_suspend(device_t dev)
439 struct twe_softc *sc = device_get_softc(dev);
444 sc->twe_state |= TWE_STATE_SUSPEND;
446 twe_disable_interrupts(sc);
452 /********************************************************************************
453 * Bring the controller back to a state ready for operation.
456 twe_resume(device_t dev)
458 struct twe_softc *sc = device_get_softc(dev);
462 sc->twe_state &= ~TWE_STATE_SUSPEND;
463 twe_enable_interrupts(sc);
468 /*******************************************************************************
469 * Take an interrupt, or be poked by other code to look for interrupt-worthy
473 twe_pci_intr(void *arg)
475 twe_intr((struct twe_softc *)arg);
478 /********************************************************************************
479 * Delayed-startup hook
482 twe_intrhook(void *arg)
484 struct twe_softc *sc = (struct twe_softc *)arg;
486 /* pull ourselves off the intrhook chain */
487 config_intrhook_disestablish(&sc->twe_ich);
489 /* call core startup routine */
493 /********************************************************************************
494 * Given a detected drive, attach it to the bio interface.
496 * This is called from twe_add_unit.
499 twe_attach_drive(struct twe_softc *sc, struct twe_drive *dr)
504 dr->td_disk = device_add_child(sc->twe_dev, NULL, -1);
505 if (dr->td_disk == NULL) {
506 twe_printf(sc, "Cannot add unit\n");
509 device_set_ivars(dr->td_disk, dr);
512 * XXX It would make sense to test the online/initialising bits, but they seem to be
515 ksprintf(buf, "Unit %d, %s, %s",
517 twe_describe_code(twe_table_unittype, dr->td_type),
518 twe_describe_code(twe_table_unitstate, dr->td_state & TWE_PARAM_UNITSTATUS_MASK));
519 device_set_desc_copy(dr->td_disk, buf);
521 if ((error = bus_generic_attach(sc->twe_dev)) != 0) {
522 twe_printf(sc, "Cannot attach unit to controller. error = %d\n", error);
528 /********************************************************************************
529 * Detach the specified unit if it exsists
531 * This is called from twe_del_unit.
534 twe_detach_drive(struct twe_softc *sc, int unit)
538 if ((error = device_delete_child(sc->twe_dev, sc->twe_drive[unit].td_disk))) {
539 twe_printf(sc, "Cannot delete unit. error = %d\n", error);
542 bzero(&sc->twe_drive[unit], sizeof(sc->twe_drive[unit]));
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 ********************************************************************************/
573 * Disk device bus interface
575 static int twed_probe(device_t dev);
576 static int twed_attach(device_t dev);
577 static int twed_detach(device_t dev);
579 static device_method_t twed_methods[] = {
580 DEVMETHOD(device_probe, twed_probe),
581 DEVMETHOD(device_attach, twed_attach),
582 DEVMETHOD(device_detach, twed_detach),
586 static driver_t twed_driver = {
589 sizeof(struct twed_softc)
592 static devclass_t twed_devclass;
594 DRIVER_MODULE(Xtwed, Xtwe, twed_driver, twed_devclass, 0, 0);
596 DRIVER_MODULE(twed, twe, twed_driver, twed_devclass, 0, 0);
600 * Disk device control interface.
602 static d_open_t twed_open;
603 static d_close_t twed_close;
604 static d_strategy_t twed_strategy;
605 static d_dump_t twed_dump;
607 static struct dev_ops twed_ops = {
608 { "twed", TWED_CDEV_MAJOR, D_DISK },
610 .d_close = twed_close,
612 .d_write = physwrite,
613 .d_strategy = twed_strategy,
618 static int disks_registered = 0;
621 /********************************************************************************
622 * Handle open from generic layer.
624 * Note that this is typically only called by the diskslice code, and not
625 * for opens on subdevices (eg. slices, partitions).
628 twed_open(struct dev_open_args *ap)
630 cdev_t dev = ap->a_head.a_dev;
631 struct twed_softc *sc = (struct twed_softc *)dev->si_drv1;
632 struct disk_info info;
639 /* check that the controller is up and running */
640 if (sc->twed_controller->twe_state & TWE_STATE_SHUTDOWN)
643 /* build disk info */
644 bzero(&info, sizeof(info));
645 info.d_media_blksize = TWE_BLOCK_SIZE; /* mandatory */
646 info.d_media_blocks = sc->twed_drive->td_size;
648 info.d_type = DTYPE_ESDI; /* optional */
649 info.d_secpertrack = sc->twed_drive->td_sectors;
650 info.d_nheads = sc->twed_drive->td_heads;
651 info.d_ncylinders = sc->twed_drive->td_cylinders;
652 info.d_secpercyl = sc->twed_drive->td_sectors * sc->twed_drive->td_heads;
654 disk_setdiskinfo(&sc->twed_disk, &info);
656 sc->twed_flags |= TWED_OPEN;
660 /********************************************************************************
661 * Handle last close of the disk device.
664 twed_close(struct dev_close_args *ap)
666 cdev_t dev = ap->a_head.a_dev;
667 struct twed_softc *sc = (struct twed_softc *)dev->si_drv1;
674 sc->twed_flags &= ~TWED_OPEN;
678 /********************************************************************************
679 * Handle an I/O request.
682 twed_strategy(struct dev_strategy_args *ap)
684 cdev_t dev = ap->a_head.a_dev;
685 struct bio *bio = ap->a_bio;
686 struct twed_softc *sc = dev->si_drv1;
687 struct buf *bp = bio->bio_buf;
689 bio->bio_driver_info = sc;
696 if ((sc == NULL) || (!sc->twed_drive->td_disk)) {
697 bp->b_error = EINVAL;
698 bp->b_flags |= B_ERROR;
699 kprintf("twe: bio for invalid disk!\n");
705 /* perform accounting */
706 devstat_start_transaction(&sc->twed_stats);
708 /* queue the bio on the controller */
709 twe_enqueue_bio(sc->twed_controller, bio);
711 /* poke the controller to start I/O */
712 twe_startio(sc->twed_controller);
716 /********************************************************************************
717 * System crashdump support
720 twed_dump(struct dev_dump_args *ap)
722 cdev_t dev = ap->a_head.a_dev;
723 struct twed_softc *twed_sc = (struct twed_softc *)dev->si_drv1;
724 struct twe_softc *twe_sc = (struct twe_softc *)twed_sc->twed_controller;
727 int dumppages = MAXDUMPPGS;
731 if (!twed_sc || !twe_sc)
734 blkcnt = howmany(PAGE_SIZE, ap->a_secsize);
736 while (ap->a_count > 0) {
739 if ((ap->a_count / blkcnt) < dumppages)
740 dumppages = ap->a_count / blkcnt;
742 for (i = 0; i < dumppages; ++i) {
743 vm_paddr_t a = addr + (i * PAGE_SIZE);
744 if (is_physical_memory(a))
745 va = pmap_kenter_temporary(trunc_page(a), i);
747 va = pmap_kenter_temporary(trunc_page(0), i);
750 if ((error = twe_dump_blocks(twe_sc, twed_sc->twed_drive->td_twe_unit, ap->a_blkno, va,
751 (PAGE_SIZE * dumppages) / TWE_BLOCK_SIZE)) != 0)
755 if (dumpstatus(addr, (off_t)ap->a_count * DEV_BSIZE) < 0)
758 ap->a_blkno += blkcnt * dumppages;
759 ap->a_count -= blkcnt * dumppages;
760 addr += PAGE_SIZE * dumppages;
765 /********************************************************************************
766 * Handle completion of an I/O request.
769 twed_intr(struct bio *bio)
771 struct buf *bp = bio->bio_buf;
772 struct twed_softc *sc = bio->bio_driver_info;
775 /* if no error, transfer completed */
776 if ((bp->b_flags & B_ERROR) == 0)
778 devstat_end_transaction_buf(&sc->twed_stats, bp);
783 /********************************************************************************
784 * Default probe stub.
787 twed_probe(device_t dev)
792 /********************************************************************************
793 * Attach a unit to the controller.
796 twed_attach(device_t dev)
798 struct twed_softc *sc;
804 /* initialise our softc */
805 sc = device_get_softc(dev);
806 parent = device_get_parent(dev);
807 sc->twed_controller = (struct twe_softc *)device_get_softc(parent);
808 sc->twed_drive = device_get_ivars(dev);
809 sc->twed_drive->td_sys_unit = device_get_unit(dev);
812 /* report the drive */
813 twed_printf(sc, "%uMB (%u sectors)\n",
814 sc->twed_drive->td_size / ((1024 * 1024) / TWE_BLOCK_SIZE),
815 sc->twed_drive->td_size);
817 devstat_add_entry(&sc->twed_stats, "twed", sc->twed_drive->td_sys_unit,
819 DEVSTAT_NO_ORDERED_TAGS,
820 DEVSTAT_TYPE_STORARRAY | DEVSTAT_TYPE_IF_OTHER,
821 DEVSTAT_PRIORITY_ARRAY);
823 /* attach a generic disk device to ourselves */
824 dsk = disk_create(sc->twed_drive->td_sys_unit, &sc->twed_disk, &twed_ops);
826 /* dsk->si_drv2 = sc->twed_drive;*/
827 sc->twed_dev_t = dsk;
832 /* set the maximum I/O size to the theoretical maximum allowed by the S/G list size */
833 dsk->si_iosize_max = (TWE_MAX_SGL_LENGTH - 1) * PAGE_SIZE;
838 /********************************************************************************
839 * Disconnect ourselves from the system.
842 twed_detach(device_t dev)
844 struct twed_softc *sc = (struct twed_softc *)device_get_softc(dev);
848 if (sc->twed_flags & TWED_OPEN)
851 devstat_remove_entry(&sc->twed_stats);
852 disk_destroy(&sc->twed_disk);
854 kprintf("Disks registered: %d\n", disks_registered);
856 if (--disks_registered == 0)
857 dev_ops_remove(&tweddisk_ops);
864 /********************************************************************************
865 ********************************************************************************
867 ********************************************************************************
868 ********************************************************************************/
870 MALLOC_DEFINE(TWE_MALLOC_CLASS, "twe commands", "twe commands");
871 /********************************************************************************
872 * Allocate a command buffer
875 twe_allocate_request(struct twe_softc *sc)
877 struct twe_request *tr;
881 * TWE requires requests to be 512-byte aligned. Depend on malloc()
882 * guarenteeing alignment for power-of-2 requests. Note that the old
883 * (FreeBSD-4.x) malloc code aligned all requests, but the new slab
884 * allocator only guarentees same-size alignment for power-of-2 requests.
886 aligned_size = (sizeof(struct twe_request) + TWE_ALIGNMASK) &
888 tr = kmalloc(aligned_size, TWE_MALLOC_CLASS, M_INTWAIT|M_ZERO);
890 if (bus_dmamap_create(sc->twe_buffer_dmat, 0, &tr->tr_cmdmap)) {
891 twe_free_request(tr);
894 bus_dmamap_load(sc->twe_buffer_dmat, tr->tr_cmdmap, &tr->tr_command,
895 sizeof(tr->tr_command), twe_setup_request_dmamap, tr, 0);
896 if (bus_dmamap_create(sc->twe_buffer_dmat, 0, &tr->tr_dmamap)) {
897 bus_dmamap_destroy(sc->twe_buffer_dmat, tr->tr_cmdmap);
898 twe_free_request(tr);
904 /********************************************************************************
905 * Permanently discard a command buffer.
908 twe_free_request(struct twe_request *tr)
910 struct twe_softc *sc = tr->tr_sc;
914 bus_dmamap_unload(sc->twe_buffer_dmat, tr->tr_cmdmap);
915 bus_dmamap_destroy(sc->twe_buffer_dmat, tr->tr_cmdmap);
916 bus_dmamap_destroy(sc->twe_buffer_dmat, tr->tr_dmamap);
917 kfree(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 if (tr->tr_flags & TWE_CMD_MAPPED)
952 panic("already mapped command");
954 tr->tr_flags |= TWE_CMD_MAPPED;
956 if (tr->tr_flags & TWE_CMD_IN_PROGRESS)
957 tr->tr_sc->twe_state &= ~TWE_STATE_FRZN;
958 /* save base of first segment in command (applicable if there only one segment) */
959 tr->tr_dataphys = segs[0].ds_addr;
961 /* correct command size for s/g list size */
962 tr->tr_command.generic.size += 2 * nsegments;
965 * Due to the fact that parameter and I/O commands have the scatter/gather list in
966 * different places, we need to determine which sort of command this actually is
967 * before we can populate it correctly.
969 switch(cmd->generic.opcode) {
970 case TWE_OP_GET_PARAM:
971 case TWE_OP_SET_PARAM:
972 cmd->generic.sgl_offset = 2;
973 twe_fillin_sgl(&cmd->param.sgl[0], segs, nsegments, TWE_MAX_SGL_LENGTH);
977 cmd->generic.sgl_offset = 3;
978 twe_fillin_sgl(&cmd->io.sgl[0], segs, nsegments, TWE_MAX_SGL_LENGTH);
980 case TWE_OP_ATA_PASSTHROUGH:
981 cmd->generic.sgl_offset = 5;
982 twe_fillin_sgl(&cmd->ata.sgl[0], segs, nsegments, TWE_MAX_ATA_SGL_LENGTH);
986 * Fall back to what the linux driver does.
987 * Do this because the API may send an opcode
988 * the driver knows nothing about and this will
989 * at least stop PCIABRT's from hosing us.
991 switch (cmd->generic.sgl_offset) {
993 twe_fillin_sgl(&cmd->param.sgl[0], segs, nsegments, TWE_MAX_SGL_LENGTH);
996 twe_fillin_sgl(&cmd->io.sgl[0], segs, nsegments, TWE_MAX_SGL_LENGTH);
999 twe_fillin_sgl(&cmd->ata.sgl[0], segs, nsegments, TWE_MAX_ATA_SGL_LENGTH);
1003 if (tr->tr_flags & TWE_CMD_DATAIN)
1004 bus_dmamap_sync(tr->tr_sc->twe_buffer_dmat, tr->tr_dmamap, BUS_DMASYNC_PREREAD);
1005 if (tr->tr_flags & TWE_CMD_DATAOUT) {
1006 /* if we're using an alignment buffer, and we're writing data, copy the real data out */
1007 if (tr->tr_flags & TWE_CMD_ALIGNBUF)
1008 bcopy(tr->tr_realdata, tr->tr_data, tr->tr_length);
1009 bus_dmamap_sync(tr->tr_sc->twe_buffer_dmat, tr->tr_dmamap, BUS_DMASYNC_PREWRITE);
1011 if (twe_start(tr) == EBUSY) {
1012 tr->tr_sc->twe_state |= TWE_STATE_CTLR_BUSY;
1013 twe_requeue_ready(tr);
1018 twe_setup_request_dmamap(void *arg, bus_dma_segment_t *segs, int nsegments, int error)
1020 struct twe_request *tr = (struct twe_request *)arg;
1024 /* command can't cross a page boundary */
1025 tr->tr_cmdphys = segs[0].ds_addr;
1029 twe_map_request(struct twe_request *tr)
1031 struct twe_softc *sc = tr->tr_sc;
1036 if (sc->twe_state & (TWE_STATE_CTLR_BUSY | TWE_STATE_FRZN)) {
1037 twe_requeue_ready(tr);
1042 * Map the command into bus space.
1044 bus_dmamap_sync(sc->twe_buffer_dmat, tr->tr_cmdmap, BUS_DMASYNC_PREWRITE);
1047 * If the command involves data, map that too.
1049 if ((tr->tr_data != NULL) && ((tr->tr_flags & TWE_CMD_MAPPED) == 0)) {
1052 * Data must be 512-byte aligned; allocate a fixup buffer if it's not.
1054 * DragonFly's malloc only guarentees alignment for requests which
1055 * are power-of-2 sized.
1057 if (((vm_offset_t)tr->tr_data % TWE_ALIGNMENT) != 0) {
1060 tr->tr_realdata = tr->tr_data; /* save pointer to 'real' data */
1061 aligned_size = TWE_ALIGNMENT;
1062 while (aligned_size < tr->tr_length)
1064 tr->tr_flags |= TWE_CMD_ALIGNBUF;
1065 tr->tr_data = kmalloc(aligned_size, TWE_MALLOC_CLASS, M_INTWAIT);
1066 if (tr->tr_data == NULL) {
1067 twe_printf(sc, "%s: malloc failed\n", __func__);
1068 tr->tr_data = tr->tr_realdata; /* restore original data pointer */
1074 * Map the data buffer into bus space and build the s/g list.
1076 if ((error = bus_dmamap_load(sc->twe_buffer_dmat, tr->tr_dmamap, tr->tr_data,
1077 tr->tr_length, twe_setup_data_dmamap, tr, BUS_DMA_NOWAIT)
1079 tr->tr_flags |= TWE_CMD_IN_PROGRESS;
1080 sc->twe_state |= TWE_STATE_FRZN;
1084 if ((error = twe_start(tr)) == EBUSY) {
1085 sc->twe_state |= TWE_STATE_CTLR_BUSY;
1086 twe_requeue_ready(tr);
1094 twe_unmap_request(struct twe_request *tr)
1096 struct twe_softc *sc = tr->tr_sc;
1100 * Unmap the command from bus space.
1102 bus_dmamap_sync(sc->twe_buffer_dmat, tr->tr_cmdmap, BUS_DMASYNC_POSTWRITE);
1105 * If the command involved data, unmap that too.
1107 if (tr->tr_data != NULL) {
1109 if (tr->tr_flags & TWE_CMD_DATAIN) {
1110 bus_dmamap_sync(sc->twe_buffer_dmat, tr->tr_dmamap, BUS_DMASYNC_POSTREAD);
1111 /* if we're using an alignment buffer, and we're reading data, copy the real data in */
1112 if (tr->tr_flags & TWE_CMD_ALIGNBUF)
1113 bcopy(tr->tr_data, tr->tr_realdata, tr->tr_length);
1115 if (tr->tr_flags & TWE_CMD_DATAOUT)
1116 bus_dmamap_sync(sc->twe_buffer_dmat, tr->tr_dmamap, BUS_DMASYNC_POSTWRITE);
1118 bus_dmamap_unload(sc->twe_buffer_dmat, tr->tr_dmamap);
1121 /* free alignment buffer if it was used */
1122 if (tr->tr_flags & TWE_CMD_ALIGNBUF) {
1123 kfree(tr->tr_data, TWE_MALLOC_CLASS);
1124 tr->tr_data = tr->tr_realdata; /* restore 'real' data pointer */
1129 void twe_report(void);
1130 /********************************************************************************
1131 * Print current controller status, call from DDB.
1136 struct twe_softc *sc;
1140 for (i = 0; (sc = devclass_get_softc(twe_devclass, i)) != NULL; i++)
1141 twe_print_controller(sc);
1142 kprintf("twed: total bio count in %u out %u\n", twed_bio_in, twed_bio_out);