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
);