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freebsd-dev/sys/dev/ata/ata-dma.c
Søren Schmidt f63c7e582a Support DMA on ATAPI devices (finally). 
This makes my system use only ~5% CPU on reading 4.5Mbyte/sec
from a CDROM, which before was limitted to 1.8Mbyte/sec due
to 100% CPU load..
1999-08-10 21:59:58 +00:00

384 lines
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C
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/*-
* Copyright (c) 1998,1999 Søren Schmidt
* 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.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* 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.
*
* $Id: ata-dma.c,v 1.9 1999/08/06 17:39:38 sos Exp $
*/
#include "ata.h"
#include "pci.h"
#if NATA > 0
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/buf.h>
#include <sys/malloc.h>
#include <sys/bus.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#if NPCI > 0
#include <pci/pcivar.h>
#include <pci/pcireg.h>
#endif
#include <dev/ata/ata-all.h>
#ifdef __alpha__
#undef vtophys
#define vtophys(va) alpha_XXX_dmamap((vm_offset_t)va)
#endif
/* misc defines */
#define MIN(a,b) ((a)>(b)?(b):(a))
#if NPCI > 0
int32_t
ata_dmainit(struct ata_softc *scp, int32_t device,
int32_t apiomode, int32_t wdmamode, int32_t udmamode)
{
int32_t type, devno, error;
void *dmatab;
if (!scp->bmaddr)
return -1;
#ifdef ATA_DEBUGDMA
printf("ata%d: dmainit: ioaddr=0x%x altioaddr=0x%x, bmaddr=0x%x\n",
scp->lun, scp->ioaddr, scp->altioaddr, scp->bmaddr);
#endif
if (!(dmatab = malloc(PAGE_SIZE, M_DEVBUF, M_NOWAIT)))
return -1;
if (((uintptr_t)dmatab >> PAGE_SHIFT) ^
(((uintptr_t)dmatab + PAGE_SIZE - 1) >> PAGE_SHIFT)) {
printf("ata_dmainit: dmatab crosses page boundary, no DMA\n");
free(dmatab, M_DEVBUF);
return -1;
}
scp->dmatab[device ? 1 : 0] = dmatab;
type = pci_get_devid(scp->dev);
switch(type) {
case 0x71118086: /* Intel PIIX4 */
if (udmamode >= 2) {
int32_t mask48, new48;
printf("ata%d: %s: setting up UDMA2 mode on PIIX4 chip ",
scp->lun, (device) ? "slave" : "master");
error = ata_command(scp, device, ATA_C_SETFEATURES, 0, 0, 0,
ATA_UDMA2, ATA_C_FEA_SETXFER, ATA_WAIT_INTR);
if (error) {
printf("failed\n");
break;
}
printf("OK\n");
devno = (scp->unit << 1) + (device ? 1 : 0);
mask48 = (1 << devno) + (3 << (16 + (devno << 2)));
new48 = (1 << devno) + (2 << (16 + (devno << 2)));
pci_write_config(scp->dev, 0x48,
(pci_read_config(scp->dev, 0x48, 4) &
~mask48) | new48, 4);
return 0;
}
/* FALLTHROUGH */
case 0x70108086: /* Intel PIIX3 */
if (wdmamode >= 2 && apiomode >= 4) {
int32_t mask40, new40, mask44, new44;
/* if SITRE not set doit for both channels */
if (!((pci_read_config(scp->dev, 0x40, 4)>>(scp->unit<<8))&0x4000)){
new40 = pci_read_config(scp->dev, 0x40, 4);
new44 = pci_read_config(scp->dev, 0x44, 4);
if (!(new40 & 0x00004000)) {
new44 &= ~0x0000000f;
new44 |= ((new40&0x00003000)>>10)|((new40&0x00000300)>>8);
}
if (!(new40 & 0x40000000)) {
new44 &= ~0x000000f0;
new44 |= ((new40&0x30000000)>>22)|((new40&0x03000000)>>20);
}
new40 |= 0x40004000;
pci_write_config(scp->dev, 0x40, new40, 4);
pci_write_config(scp->dev, 0x44, new44, 4);
}
printf("ata%d: %s: setting up WDMA2 mode on PIIX3/4 chip ",
scp->lun, (device) ? "slave" : "master");
error = ata_command(scp, device, ATA_C_SETFEATURES, 0, 0, 0,
ATA_WDMA2, ATA_C_FEA_SETXFER, ATA_WAIT_INTR);
if (error) {
printf("failed\n");
break;
}
printf("OK\n");
if (device == ATA_MASTER) {
mask40 = 0x0000330f;
new40 = 0x00002307;
mask44 = 0;
new44 = 0;
} else {
mask40 = 0x000000f0;
new40 = 0x00000070;
mask44 = 0x0000000f;
new44 = 0x0000000b;
}
if (scp->unit) {
mask40 <<= 16;
new40 <<= 16;
mask44 <<= 4;
new44 <<= 4;
}
pci_write_config(scp->dev, 0x40,
(pci_read_config(scp->dev, 0x40, 4) &
~mask40) | new40, 4);
pci_write_config(scp->dev, 0x44,
(pci_read_config(scp->dev, 0x44, 4) &
~mask44) | new44, 4);
return 0;
}
break;
case 0x12308086: /* Intel PIIX */
/* probably not worth the trouble */
break;
case 0x4d33105a: /* Promise Ultra/33 / FastTrack controllers */
case 0x4d38105a: /* Promise Ultra/66 controllers */
/* the promise seems to have trouble with DMA on ATAPI devices */
if ((device == ATA_MASTER && scp->devices & ATA_ATAPI_MASTER) ||
(device == ATA_SLAVE && scp->devices & ATA_ATAPI_SLAVE))
break;
devno = (scp->unit << 1) + (device ? 1 : 0);
if (udmamode >=2) {
printf("ata%d: %s: setting up UDMA2 mode on Promise chip ",
scp->lun, (device) ? "slave" : "master");
error = ata_command(scp, device, ATA_C_SETFEATURES, 0, 0, 0,
ATA_UDMA2, ATA_C_FEA_SETXFER, ATA_WAIT_INTR);
if (error) {
printf("failed\n");
break;
}
printf("OK\n");
pci_write_config(scp->dev, 0x60 + (devno << 2), 0x004127f3, 4);
return 0;
}
else if (wdmamode >= 2 && apiomode >= 4) {
printf("ata%d: %s: setting up WDMA2 mode on Promise chip ",
scp->lun, (device) ? "slave" : "master");
error = ata_command(scp, device, ATA_C_SETFEATURES, 0, 0, 0,
ATA_WDMA2, ATA_C_FEA_SETXFER, ATA_WAIT_INTR);
if (error) {
printf("failed\n");
break;
}
printf("OK\n");
pci_write_config(scp->dev, 0x60 + (devno << 2), 0x004367f3, 4);
return 0;
}
else {
printf("ata%d: %s: setting up PIO mode on Promise chip OK\n",
scp->lun, (device) ? "slave" : "master");
pci_write_config(scp->dev, 0x60 + (devno << 2), 0x004fe924, 4);
}
break;
case 0x522910b9: /* AcerLabs Aladdin IV/V */
if (udmamode >=2) {
int32_t word54 = pci_read_config(scp->dev, 0x54, 4);
printf("ata%d: %s: setting up UDMA2 mode on Aladdin chip ",
scp->lun, (device) ? "slave" : "master");
error = ata_command(scp, device, ATA_C_SETFEATURES, 0, 0, 0,
ATA_UDMA2, ATA_C_FEA_SETXFER, ATA_WAIT_INTR);
if (error) {
printf("failed\n");
break;
}
printf("OK\n");
word54 |= 0x5555;
word54 |= (0x0000000A << (16 + (scp->unit << 3) + (device << 2)));
pci_write_config(scp->dev, 0x54, word54, 4);
return 0;
}
else if (wdmamode >= 2 && apiomode >= 4) {
printf("ata%d: %s: setting up WDMA2 mode on Aladdin chip ",
scp->lun, (device) ? "slave" : "master");
error = ata_command(scp, device, ATA_C_SETFEATURES, 0, 0, 0,
ATA_WDMA2, ATA_C_FEA_SETXFER, ATA_WAIT_INTR);
if (error) {
printf("failed\n");
break;
}
printf("OK\n");
return 0;
}
break;
default: /* well, we have no support for this, but try anyways */
if ((wdmamode >= 2 && apiomode >= 4) || udmamode >= 2) {
printf("ata%d: %s: setting up generic WDMA2 mode ",
scp->lun, (device) ? "slave" : "master");
error = ata_command(scp, device, ATA_C_SETFEATURES, 0, 0, 0,
ATA_WDMA2, ATA_C_FEA_SETXFER, ATA_WAIT_INTR);
if (error) {
printf("failed\n");
break;
}
printf("OK\n");
return 0;
}
}
free(dmatab, M_DEVBUF);
return -1;
}
int32_t
ata_dmasetup(struct ata_softc *scp, int32_t device,
int8_t *data, int32_t count, int32_t flags)
{
struct ata_dmaentry *dmatab;
u_int32_t dma_count, dma_base;
int32_t i = 0;
#ifdef ATA_DEBUGDMA
printf("ata%d: dmasetup\n", scp->lun);
#endif
if (((uintptr_t)data & 1) || (count & 1))
return -1;
if (!count) {
printf("ata%d: zero length DMA transfer attempt on %s\n",
scp->lun, (device ? "slave" : "master"));
return -1;
}
dmatab = scp->dmatab[device ? 1 : 0];
dma_base = vtophys(data);
dma_count = MIN(count, (PAGE_SIZE - ((uintptr_t)data & PAGE_MASK)));
data += dma_count;
count -= dma_count;
while (count) {
dmatab[i].base = dma_base;
dmatab[i].count = (dma_count & 0xffff);
i++;
if (i >= ATA_DMA_ENTRIES) {
printf("ata%d: too many segments in DMA table for %s\n",
scp->lun, (device ? "slave" : "master"));
return -1;
}
dma_base = vtophys(data);
dma_count = MIN(count, PAGE_SIZE);
data += MIN(count, PAGE_SIZE);
count -= MIN(count, PAGE_SIZE);
}
#ifdef ATA_DEBUGDMA
printf("ata_dmasetup: base=%08x count%08x\n",
dma_base, dma_count);
#endif
dmatab[i].base = dma_base;
dmatab[i].count = (dma_count & 0xffff) | ATA_DMA_EOT;
outl(scp->bmaddr + ATA_BMDTP_PORT, vtophys(dmatab));
#ifdef ATA_DEBUGDMA
printf("dmatab=%08x %08x\n", vtophys(dmatab), inl(scp->bmaddr+ATA_BMDTP_PORT));
#endif
outb(scp->bmaddr + ATA_BMCMD_PORT, flags ? ATA_BMCMD_WRITE_READ:0);
outb(scp->bmaddr + ATA_BMSTAT_PORT, (inb(scp->bmaddr + ATA_BMSTAT_PORT) |
(ATA_BMSTAT_INTERRUPT | ATA_BMSTAT_ERROR)));
return 0;
}
void
ata_dmastart(struct ata_softc *scp, int32_t device)
{
#ifdef ATA_DEBUGDMA
printf("ata%d: dmastart\n", scp->lun);
#endif
outb(scp->bmaddr + ATA_BMCMD_PORT,
inb(scp->bmaddr + ATA_BMCMD_PORT) | ATA_BMCMD_START_STOP);
}
int32_t
ata_dmadone(struct ata_softc *scp, int32_t device)
{
#ifdef ATA_DEBUGDMA
printf("ata%d: dmadone\n", scp->lun);
#endif
outb(scp->bmaddr + ATA_BMCMD_PORT,
inb(scp->bmaddr + ATA_BMCMD_PORT) & ~ATA_BMCMD_START_STOP);
return inb(scp->bmaddr + ATA_BMSTAT_PORT) & ATA_BMSTAT_MASK;
}
int32_t
ata_dmastatus(struct ata_softc *scp, int32_t device)
{
#ifdef ATA_DEBUGDMA
printf("ata%d: dmastatus\n", scp->lun);
#endif
return inb(scp->bmaddr + ATA_BMSTAT_PORT) & ATA_BMSTAT_MASK;
}
#else /* NPCI > 0 */
int32_t
ata_dmainit(struct ata_softc *scp, int32_t device,
int32_t piomode, int32_t wdmamode, int32_t udmamode)
{
return -1;
}
int32_t
ata_dmasetup(struct ata_softc *scp, int32_t device,
int8_t *data, int32_t count, int32_t flags)
{
return -1;
}
void
ata_dmastart(struct ata_softc *scp, int32_t device)
{
}
int32_t
ata_dmadone(struct ata_softc *scp, int32_t device)
{
return -1;
}
int32_t
ata_dmastatus(struct ata_softc *scp, int32_t device)
{
return -1;
}
#endif /* NPCI > 0 */
#endif /* NATA > 0 */
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