283 lines
8.2 KiB
C
283 lines
8.2 KiB
C
/*-
|
|
* Copyright (c) 1998 - 2006 Søren Schmidt <sos@FreeBSD.org>
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer,
|
|
* without modification, immediately at the beginning of the file.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/ata.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/endian.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/lock.h>
|
|
#include <sys/sema.h>
|
|
#include <sys/taskqueue.h>
|
|
#include <vm/uma.h>
|
|
#include <sys/bus.h>
|
|
#include <machine/bus.h>
|
|
#include <sys/rman.h>
|
|
#include <dev/pci/pcivar.h>
|
|
#include <dev/ata/ata-all.h>
|
|
#include <dev/ata/ata-pci.h>
|
|
|
|
/* prototypes */
|
|
static void ata_dmaalloc(device_t);
|
|
static void ata_dmafree(device_t);
|
|
static void ata_dmasetprd(void *, bus_dma_segment_t *, int, int);
|
|
static int ata_dmaload(device_t, caddr_t, int32_t, int, void *, int *);
|
|
static int ata_dmaunload(device_t);
|
|
|
|
/* local vars */
|
|
static MALLOC_DEFINE(M_ATADMA, "ata_dma", "ATA driver DMA");
|
|
|
|
/* misc defines */
|
|
#define MAXTABSZ PAGE_SIZE
|
|
#define MAXWSPCSZ PAGE_SIZE*2
|
|
|
|
struct ata_dc_cb_args {
|
|
bus_addr_t maddr;
|
|
int error;
|
|
};
|
|
|
|
void
|
|
ata_dmainit(device_t dev)
|
|
{
|
|
struct ata_channel *ch = device_get_softc(dev);
|
|
|
|
if ((ch->dma = malloc(sizeof(struct ata_dma), M_ATADMA, M_NOWAIT|M_ZERO))) {
|
|
ch->dma->alloc = ata_dmaalloc;
|
|
ch->dma->free = ata_dmafree;
|
|
ch->dma->setprd = ata_dmasetprd;
|
|
ch->dma->load = ata_dmaload;
|
|
ch->dma->unload = ata_dmaunload;
|
|
ch->dma->alignment = 2;
|
|
ch->dma->boundary = 128 * DEV_BSIZE;
|
|
ch->dma->segsize = 128 * DEV_BSIZE;
|
|
ch->dma->max_iosize = 128 * DEV_BSIZE;
|
|
}
|
|
}
|
|
|
|
static void
|
|
ata_dmasetupc_cb(void *xsc, bus_dma_segment_t *segs, int nsegs, int error)
|
|
{
|
|
struct ata_dc_cb_args *cba = (struct ata_dc_cb_args *)xsc;
|
|
|
|
if (!(cba->error = error))
|
|
cba->maddr = segs[0].ds_addr;
|
|
}
|
|
|
|
static void
|
|
ata_dmaalloc(device_t dev)
|
|
{
|
|
struct ata_channel *ch = device_get_softc(dev);
|
|
struct ata_dc_cb_args ccba;
|
|
|
|
if (bus_dma_tag_create(NULL, ch->dma->alignment, 0,
|
|
BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR,
|
|
NULL, NULL, ch->dma->max_iosize,
|
|
ATA_DMA_ENTRIES, ch->dma->segsize,
|
|
0, NULL, NULL, &ch->dma->dmatag))
|
|
goto error;
|
|
|
|
if (bus_dma_tag_create(ch->dma->dmatag, PAGE_SIZE, PAGE_SIZE,
|
|
BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR,
|
|
NULL, NULL, MAXTABSZ, 1, MAXTABSZ,
|
|
0, NULL, NULL, &ch->dma->sg_tag))
|
|
goto error;
|
|
|
|
if (bus_dma_tag_create(ch->dma->dmatag,ch->dma->alignment,ch->dma->boundary,
|
|
BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR,
|
|
NULL, NULL, ch->dma->max_iosize,
|
|
ATA_DMA_ENTRIES, ch->dma->segsize,
|
|
0, NULL, NULL, &ch->dma->data_tag))
|
|
goto error;
|
|
|
|
if (bus_dmamem_alloc(ch->dma->sg_tag, (void **)&ch->dma->sg, 0,
|
|
&ch->dma->sg_map))
|
|
goto error;
|
|
|
|
if (bus_dmamap_load(ch->dma->sg_tag, ch->dma->sg_map, ch->dma->sg,
|
|
MAXTABSZ, ata_dmasetupc_cb, &ccba, 0) || ccba.error) {
|
|
bus_dmamem_free(ch->dma->sg_tag, ch->dma->sg, ch->dma->sg_map);
|
|
goto error;
|
|
}
|
|
ch->dma->sg_bus = ccba.maddr;
|
|
|
|
if (bus_dmamap_create(ch->dma->data_tag, 0, &ch->dma->data_map))
|
|
goto error;
|
|
|
|
if (bus_dma_tag_create(ch->dma->dmatag, PAGE_SIZE, 64 * 1024,
|
|
BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR,
|
|
NULL, NULL, MAXWSPCSZ, 1, MAXWSPCSZ,
|
|
0, NULL, NULL, &ch->dma->work_tag))
|
|
goto error;
|
|
|
|
if (bus_dmamem_alloc(ch->dma->work_tag, (void **)&ch->dma->work, 0,
|
|
&ch->dma->work_map))
|
|
goto error;
|
|
|
|
if (bus_dmamap_load(ch->dma->work_tag, ch->dma->work_map,ch->dma->work,
|
|
MAXWSPCSZ, ata_dmasetupc_cb, &ccba, 0) || ccba.error) {
|
|
bus_dmamem_free(ch->dma->work_tag,ch->dma->work, ch->dma->work_map);
|
|
goto error;
|
|
}
|
|
ch->dma->work_bus = ccba.maddr;
|
|
|
|
return;
|
|
|
|
error:
|
|
device_printf(dev, "WARNING - DMA allocation failed, disabling DMA\n");
|
|
ata_dmafree(dev);
|
|
free(ch->dma, M_ATADMA);
|
|
ch->dma = NULL;
|
|
}
|
|
|
|
static void
|
|
ata_dmafree(device_t dev)
|
|
{
|
|
struct ata_channel *ch = device_get_softc(dev);
|
|
|
|
if (ch->dma->work_bus) {
|
|
bus_dmamap_unload(ch->dma->work_tag, ch->dma->work_map);
|
|
bus_dmamem_free(ch->dma->work_tag, ch->dma->work, ch->dma->work_map);
|
|
ch->dma->work_bus = 0;
|
|
ch->dma->work_map = NULL;
|
|
ch->dma->work = NULL;
|
|
}
|
|
if (ch->dma->work_tag) {
|
|
bus_dma_tag_destroy(ch->dma->work_tag);
|
|
ch->dma->work_tag = NULL;
|
|
}
|
|
if (ch->dma->sg_bus) {
|
|
bus_dmamap_unload(ch->dma->sg_tag, ch->dma->sg_map);
|
|
bus_dmamem_free(ch->dma->sg_tag, ch->dma->sg, ch->dma->sg_map);
|
|
ch->dma->sg_bus = 0;
|
|
ch->dma->sg_map = NULL;
|
|
ch->dma->sg = NULL;
|
|
}
|
|
if (ch->dma->data_map) {
|
|
bus_dmamap_destroy(ch->dma->data_tag, ch->dma->data_map);
|
|
ch->dma->data_map = NULL;
|
|
}
|
|
if (ch->dma->sg_tag) {
|
|
bus_dma_tag_destroy(ch->dma->sg_tag);
|
|
ch->dma->sg_tag = NULL;
|
|
}
|
|
if (ch->dma->data_tag) {
|
|
bus_dma_tag_destroy(ch->dma->data_tag);
|
|
ch->dma->data_tag = NULL;
|
|
}
|
|
if (ch->dma->dmatag) {
|
|
bus_dma_tag_destroy(ch->dma->dmatag);
|
|
ch->dma->dmatag = NULL;
|
|
}
|
|
}
|
|
|
|
static void
|
|
ata_dmasetprd(void *xsc, bus_dma_segment_t *segs, int nsegs, int error)
|
|
{
|
|
struct ata_dmasetprd_args *args = xsc;
|
|
struct ata_dma_prdentry *prd = args->dmatab;
|
|
int i;
|
|
|
|
if ((args->error = error))
|
|
return;
|
|
|
|
for (i = 0; i < nsegs; i++) {
|
|
prd[i].addr = htole32(segs[i].ds_addr);
|
|
prd[i].count = htole32(segs[i].ds_len);
|
|
}
|
|
prd[i - 1].count |= htole32(ATA_DMA_EOT);
|
|
args->nsegs = nsegs;
|
|
}
|
|
|
|
static int
|
|
ata_dmaload(device_t dev, caddr_t data, int32_t count, int dir,
|
|
void *addr, int *entries)
|
|
{
|
|
struct ata_channel *ch = device_get_softc(dev);
|
|
struct ata_dmasetprd_args cba;
|
|
int error;
|
|
|
|
if (ch->dma->flags & ATA_DMA_LOADED) {
|
|
device_printf(dev, "FAILURE - already active DMA on this device\n");
|
|
return EIO;
|
|
}
|
|
if (!count) {
|
|
device_printf(dev, "FAILURE - zero length DMA transfer attempted\n");
|
|
return EIO;
|
|
}
|
|
if (((uintptr_t)data & (ch->dma->alignment - 1)) ||
|
|
(count & (ch->dma->alignment - 1))) {
|
|
device_printf(dev, "FAILURE - non aligned DMA transfer attempted\n");
|
|
return EIO;
|
|
}
|
|
if (count > ch->dma->max_iosize) {
|
|
device_printf(dev, "FAILURE - oversized DMA transfer attempt %d > %d\n",
|
|
count, ch->dma->max_iosize);
|
|
return EIO;
|
|
}
|
|
|
|
cba.dmatab = addr;
|
|
|
|
if ((error = bus_dmamap_load(ch->dma->data_tag, ch->dma->data_map,
|
|
data, count, ch->dma->setprd, &cba,
|
|
BUS_DMA_NOWAIT)) || (error = cba.error))
|
|
return error;
|
|
|
|
*entries = cba.nsegs;
|
|
|
|
bus_dmamap_sync(ch->dma->sg_tag, ch->dma->sg_map, BUS_DMASYNC_PREWRITE);
|
|
|
|
bus_dmamap_sync(ch->dma->data_tag, ch->dma->data_map,
|
|
dir ? BUS_DMASYNC_PREREAD : BUS_DMASYNC_PREWRITE);
|
|
|
|
ch->dma->cur_iosize = count;
|
|
ch->dma->flags = dir ? (ATA_DMA_LOADED | ATA_DMA_READ) : ATA_DMA_LOADED;
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
ata_dmaunload(device_t dev)
|
|
{
|
|
struct ata_channel *ch = device_get_softc(dev);
|
|
|
|
if (ch->dma->flags & ATA_DMA_LOADED) {
|
|
bus_dmamap_sync(ch->dma->sg_tag, ch->dma->sg_map,
|
|
BUS_DMASYNC_POSTWRITE);
|
|
|
|
bus_dmamap_sync(ch->dma->data_tag, ch->dma->data_map,
|
|
(ch->dma->flags & ATA_DMA_READ) != 0 ?
|
|
BUS_DMASYNC_POSTREAD : BUS_DMASYNC_POSTWRITE);
|
|
bus_dmamap_unload(ch->dma->data_tag, ch->dma->data_map);
|
|
|
|
ch->dma->cur_iosize = 0;
|
|
ch->dma->flags &= ~ATA_DMA_LOADED;
|
|
}
|
|
return 0;
|
|
}
|