mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-23 11:18:54 +00:00
a2677ff239
leave them as purely opaque values that are only set by bus_dmamem_alloc().
349 lines
10 KiB
C
349 lines
10 KiB
C
/*-
|
|
* Copyright (c) 1998 - 2008 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/ata/ata-all.h>
|
|
|
|
/* prototypes */
|
|
static void ata_dmasetupc_cb(void *xsc, bus_dma_segment_t *segs, int nsegs, int error);
|
|
static void ata_dmaalloc(device_t dev);
|
|
static void ata_dmafree(device_t dev);
|
|
static void ata_dmasetprd(void *xsc, bus_dma_segment_t *segs, int nsegs, int error);
|
|
static int ata_dmaload(struct ata_request *request, void *addr, int *nsegs);
|
|
static int ata_dmaunload(struct ata_request *request);
|
|
|
|
/* 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);
|
|
struct ata_dc_cb_args dcba;
|
|
|
|
if (ch->dma.alloc == NULL)
|
|
ch->dma.alloc = ata_dmaalloc;
|
|
if (ch->dma.free == NULL)
|
|
ch->dma.free = ata_dmafree;
|
|
if (ch->dma.setprd == NULL)
|
|
ch->dma.setprd = ata_dmasetprd;
|
|
if (ch->dma.load == NULL)
|
|
ch->dma.load = ata_dmaload;
|
|
if (ch->dma.unload == NULL)
|
|
ch->dma.unload = ata_dmaunload;
|
|
if (ch->dma.alignment == 0)
|
|
ch->dma.alignment = 2;
|
|
if (ch->dma.boundary == 0)
|
|
ch->dma.boundary = 65536;
|
|
if (ch->dma.segsize == 0)
|
|
ch->dma.segsize = 65536;
|
|
if (ch->dma.max_iosize == 0)
|
|
ch->dma.max_iosize = MIN((ATA_DMA_ENTRIES - 1) * PAGE_SIZE, MAXPHYS);
|
|
if (ch->dma.max_address == 0)
|
|
ch->dma.max_address = BUS_SPACE_MAXADDR_32BIT;
|
|
if (ch->dma.dma_slots == 0)
|
|
ch->dma.dma_slots = 1;
|
|
|
|
if (bus_dma_tag_create(bus_get_dma_tag(dev), ch->dma.alignment, 0,
|
|
ch->dma.max_address, 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, 64 * 1024,
|
|
ch->dma.max_address, 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,
|
|
BUS_DMA_WAITOK | BUS_DMA_COHERENT,
|
|
&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, &dcba, 0) ||
|
|
dcba.error) {
|
|
bus_dmamem_free(ch->dma.work_tag, ch->dma.work, ch->dma.work_map);
|
|
goto error;
|
|
}
|
|
ch->dma.work_bus = dcba.maddr;
|
|
return;
|
|
|
|
error:
|
|
device_printf(dev, "WARNING - DMA initialization failed, disabling DMA\n");
|
|
ata_dmafini(dev);
|
|
}
|
|
|
|
void
|
|
ata_dmafini(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 = NULL;
|
|
}
|
|
if (ch->dma.work_tag) {
|
|
bus_dma_tag_destroy(ch->dma.work_tag);
|
|
ch->dma.work_tag = NULL;
|
|
}
|
|
if (ch->dma.dmatag) {
|
|
bus_dma_tag_destroy(ch->dma.dmatag);
|
|
ch->dma.dmatag = NULL;
|
|
}
|
|
}
|
|
|
|
static void
|
|
ata_dmasetupc_cb(void *xsc, bus_dma_segment_t *segs, int nsegs, int error)
|
|
{
|
|
struct ata_dc_cb_args *dcba = (struct ata_dc_cb_args *)xsc;
|
|
|
|
if (!(dcba->error = error))
|
|
dcba->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 dcba;
|
|
int i;
|
|
|
|
/* alloc and setup needed dma slots */
|
|
bzero(ch->dma.slot, sizeof(struct ata_dmaslot) * ATA_DMA_SLOTS);
|
|
for (i = 0; i < ch->dma.dma_slots; i++) {
|
|
struct ata_dmaslot *slot = &ch->dma.slot[i];
|
|
|
|
if (bus_dma_tag_create(ch->dma.dmatag, PAGE_SIZE, PAGE_SIZE,
|
|
ch->dma.max_address, BUS_SPACE_MAXADDR,
|
|
NULL, NULL, PAGE_SIZE, 1, PAGE_SIZE,
|
|
0, NULL, NULL, &slot->sg_tag)) {
|
|
device_printf(ch->dev, "FAILURE - create sg_tag\n");
|
|
goto error;
|
|
}
|
|
|
|
if (bus_dmamem_alloc(slot->sg_tag, (void **)&slot->sg, BUS_DMA_WAITOK,
|
|
&slot->sg_map)) {
|
|
device_printf(ch->dev, "FAILURE - alloc sg_map\n");
|
|
goto error;
|
|
}
|
|
|
|
if (bus_dmamap_load(slot->sg_tag, slot->sg_map, slot->sg, MAXTABSZ,
|
|
ata_dmasetupc_cb, &dcba, 0) || dcba.error) {
|
|
device_printf(ch->dev, "FAILURE - load sg\n");
|
|
goto error;
|
|
}
|
|
slot->sg_bus = dcba.maddr;
|
|
|
|
if (bus_dma_tag_create(ch->dma.dmatag,
|
|
ch->dma.alignment, ch->dma.boundary,
|
|
ch->dma.max_address, BUS_SPACE_MAXADDR,
|
|
NULL, NULL, ch->dma.max_iosize,
|
|
ATA_DMA_ENTRIES, ch->dma.segsize,
|
|
BUS_DMA_ALLOCNOW, NULL, NULL, &slot->data_tag)) {
|
|
device_printf(ch->dev, "FAILURE - create data_tag\n");
|
|
goto error;
|
|
}
|
|
|
|
if (bus_dmamap_create(slot->data_tag, 0, &slot->data_map)) {
|
|
device_printf(ch->dev, "FAILURE - create data_map\n");
|
|
goto error;
|
|
}
|
|
}
|
|
|
|
return;
|
|
|
|
error:
|
|
device_printf(dev, "WARNING - DMA allocation failed, disabling DMA\n");
|
|
ata_dmafree(dev);
|
|
}
|
|
|
|
static void
|
|
ata_dmafree(device_t dev)
|
|
{
|
|
struct ata_channel *ch = device_get_softc(dev);
|
|
int i;
|
|
|
|
/* free all dma slots */
|
|
for (i = 0; i < ATA_DMA_SLOTS; i++) {
|
|
struct ata_dmaslot *slot = &ch->dma.slot[i];
|
|
|
|
if (slot->sg_bus) {
|
|
bus_dmamap_unload(slot->sg_tag, slot->sg_map);
|
|
slot->sg_bus = 0;
|
|
}
|
|
if (slot->sg) {
|
|
bus_dmamem_free(slot->sg_tag, slot->sg, slot->sg_map);
|
|
slot->sg = NULL;
|
|
}
|
|
if (slot->data_map) {
|
|
bus_dmamap_destroy(slot->data_tag, slot->data_map);
|
|
slot->data_map = NULL;
|
|
}
|
|
if (slot->sg_tag) {
|
|
bus_dma_tag_destroy(slot->sg_tag);
|
|
slot->sg_tag = NULL;
|
|
}
|
|
if (slot->data_tag) {
|
|
bus_dma_tag_destroy(slot->data_tag);
|
|
slot->data_tag = 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);
|
|
KASSERT(nsegs <= ATA_DMA_ENTRIES, ("too many DMA segment entries\n"));
|
|
args->nsegs = nsegs;
|
|
}
|
|
|
|
static int
|
|
ata_dmaload(struct ata_request *request, void *addr, int *entries)
|
|
{
|
|
struct ata_channel *ch = device_get_softc(request->parent);
|
|
struct ata_dmasetprd_args dspa;
|
|
int error;
|
|
|
|
ATA_DEBUG_RQ(request, "dmaload");
|
|
|
|
if (request->dma) {
|
|
device_printf(request->parent,
|
|
"FAILURE - already active DMA on this device\n");
|
|
return EIO;
|
|
}
|
|
if (!request->bytecount) {
|
|
device_printf(request->parent,
|
|
"FAILURE - zero length DMA transfer attempted\n");
|
|
return EIO;
|
|
}
|
|
if (request->bytecount & (ch->dma.alignment - 1)) {
|
|
device_printf(request->parent,
|
|
"FAILURE - odd-sized DMA transfer attempt %d %% %d\n",
|
|
request->bytecount, ch->dma.alignment);
|
|
return EIO;
|
|
}
|
|
if (request->bytecount > ch->dma.max_iosize) {
|
|
device_printf(request->parent,
|
|
"FAILURE - oversized DMA transfer attempt %d > %d\n",
|
|
request->bytecount, ch->dma.max_iosize);
|
|
return EIO;
|
|
}
|
|
|
|
/* set our slot. XXX SOS NCQ will change that */
|
|
request->dma = &ch->dma.slot[0];
|
|
|
|
if (addr)
|
|
dspa.dmatab = addr;
|
|
else
|
|
dspa.dmatab = request->dma->sg;
|
|
|
|
if (request->flags & ATA_R_DATA_IN_CCB)
|
|
error = bus_dmamap_load_ccb(request->dma->data_tag,
|
|
request->dma->data_map, request->ccb,
|
|
ch->dma.setprd, &dspa, BUS_DMA_NOWAIT);
|
|
else
|
|
error = bus_dmamap_load(request->dma->data_tag, request->dma->data_map,
|
|
request->data, request->bytecount,
|
|
ch->dma.setprd, &dspa, BUS_DMA_NOWAIT);
|
|
if (error || (error = dspa.error)) {
|
|
device_printf(request->parent, "FAILURE - load data\n");
|
|
goto error;
|
|
}
|
|
|
|
if (entries)
|
|
*entries = dspa.nsegs;
|
|
|
|
bus_dmamap_sync(request->dma->sg_tag, request->dma->sg_map,
|
|
BUS_DMASYNC_PREWRITE);
|
|
bus_dmamap_sync(request->dma->data_tag, request->dma->data_map,
|
|
(request->flags & ATA_R_READ) ?
|
|
BUS_DMASYNC_PREREAD : BUS_DMASYNC_PREWRITE);
|
|
return 0;
|
|
|
|
error:
|
|
ata_dmaunload(request);
|
|
return EIO;
|
|
}
|
|
|
|
int
|
|
ata_dmaunload(struct ata_request *request)
|
|
{
|
|
ATA_DEBUG_RQ(request, "dmaunload");
|
|
|
|
if (request->dma) {
|
|
bus_dmamap_sync(request->dma->sg_tag, request->dma->sg_map,
|
|
BUS_DMASYNC_POSTWRITE);
|
|
bus_dmamap_sync(request->dma->data_tag, request->dma->data_map,
|
|
(request->flags & ATA_R_READ) ?
|
|
BUS_DMASYNC_POSTREAD : BUS_DMASYNC_POSTWRITE);
|
|
|
|
bus_dmamap_unload(request->dma->data_tag, request->dma->data_map);
|
|
request->dma = NULL;
|
|
}
|
|
return 0;
|
|
}
|