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freebsd-src/sys/dev/ata/ata-dma.c
Søren Schmidt 3427651043 Ten'th update to the new ATA/ATAPI driver: 
It been awhile since the last major update, as a benefit there
are some cool things in this one (and new bugs probably :) )...

The ATA driver has grown "real" timeout support for all devices.
This means that it should be possible to get in contact with
(especially) lost ATAPI devices. It also means that the ATA
driver is now usable on notebooks as it will DTRT on resume.

An experimental hack at utilizing the Promise66's at UDMA66 is
in there, but I cant test it. If someone feels like sending
me one, give me a ping.

The ATAPI DMA enableling scheme has been changed, also better DMA
support for the Aladdin chipset has been implemented for ATAPI
devices. Note that the Aladdin apparently only can do DMA reads
on ATAPI devices, and the Promise cant do ATAPI DMA at all.
I have seen problems on some ATAPI devices that should be able
to run in DMA mode, so if you encounter problems with hanging
atapi devices during the probe, or during access, disable DMA
in atapi-all.c, and let me know. It might be nessesary to do this
via a "white list" for known good devices...

The ATAPI CDROM driver can now use eject/close without hanging and
the bug that caused reading beyond the end of a CD has been fixed.
Media change is also handled proberly. DVD drives are identified
and are usable as CDROM devices at least, I dont have the HW to
test this further, see above :).

The ATAPI tape driver has gotten some support for using the DSC
method for not blocking the IDE channel during read/write when
the device has full buffers. It knows about the OnStream DI-30
device, support is not completed yet, but it can function as a
primitive backup medium, without filemarks, and without bad media
handeling. This is because the OnStream device doesn't handle this
(like everybody else) in HW. It also now supports getting/setting
the record position on devices that supports it.

Some rather major cleanups and rearrangements as well (cvs -b diff
is your freind). I'm closing in on declaring this for beta code,
most of the infrastruture is in place by now.

As usual USE AT YOUR OWN RISK!!, this is still alpha level code.
This driver can hose your disk real bad if anything goes wrong, but
now you have been warned :)

But please tell me how it works for you!

Enjoy!

-Søren
1999-09-21 19:50:40 +00:00

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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.
*
* $FreeBSD$
*/
#include "ata.h"
#include "pci.h"
#include "apm.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
#if NAPM > 0
#include <machine/apm_bios.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_DMADEBUG
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 == ATA_MASTER) ? 0 : 1] = dmatab;
switch (type = pci_get_devid(scp->dev)) {
case 0x71118086: /* Intel PIIX4 */
if (udmamode >= 2) {
int32_t mask48, new48;
error = ata_command(scp, device, ATA_C_SETFEATURES, 0, 0, 0,
ATA_UDMA2, ATA_C_FEA_SETXFER, ATA_IGNORE_INTR);
if (bootverbose)
printf("ata%d: %s: %s setting up UDMA2 mode on PIIX4 chip\n",
scp->lun, (device == ATA_MASTER) ? "master" : "slave",
(error) ? "failed" : "success");
if (error)
break;
devno = (scp->unit << 1) + ((device == ATA_MASTER) ? 0 : 1);
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);
scp->mode[(device == ATA_MASTER) ? 0 : 1] = ATA_MODE_UDMA33;
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);
}
error = ata_command(scp, device, ATA_C_SETFEATURES, 0, 0, 0,
ATA_WDMA2, ATA_C_FEA_SETXFER, ATA_IGNORE_INTR);
if (bootverbose)
printf("ata%d: %s: %s setting up WDMA2 mode on PIIX4 chip\n",
scp->lun, (device == ATA_MASTER) ? "master" : "slave",
(error) ? "failed" : "success");
if (error)
break;
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);
scp->mode[(device == ATA_MASTER) ? 0 : 1] = ATA_MODE_DMA;
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 can only do DMA on ATA disks not 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 == ATA_MASTER) ? 0 : 1);
if (udmamode >=4 && type == 0x4d38105a) {
error = ata_command(scp, device, ATA_C_SETFEATURES, 0, 0, 0,
ATA_UDMA4, ATA_C_FEA_SETXFER, ATA_IGNORE_INTR);
if (bootverbose)
printf("ata%d: %s: %s setting up UDMA4 mode on Promise chip\n",
scp->lun, (device == ATA_MASTER) ? "master" : "slave",
(error) ? "failed" : "success");
if (error)
break;
pci_write_config(scp->dev, 0x60 + (devno << 2), 0x004117f3, 4);
scp->mode[(device == ATA_MASTER) ? 0 : 1] = ATA_MODE_UDMA66;
return 0;
}
if (udmamode >=2) {
error = ata_command(scp, device, ATA_C_SETFEATURES, 0, 0, 0,
ATA_UDMA2, ATA_C_FEA_SETXFER, ATA_IGNORE_INTR);
if (bootverbose)
printf("ata%d: %s: %s setting up UDMA2 mode on Promise chip\n",
scp->lun, (device == ATA_MASTER) ? "master" : "slave",
(error) ? "failed" : "success");
if (error)
break;
pci_write_config(scp->dev, 0x60 + (devno << 2), 0x004127f3, 4);
scp->mode[(device == ATA_MASTER) ? 0 : 1] = ATA_MODE_UDMA33;
return 0;
}
else if (wdmamode >= 2 && apiomode >= 4) {
error = ata_command(scp, device, ATA_C_SETFEATURES, 0, 0, 0,
ATA_WDMA2, ATA_C_FEA_SETXFER, ATA_IGNORE_INTR);
if (bootverbose)
printf("ata%d: %s: %s setting up WDMA2 mode on Promise chip\n",
scp->lun, (device == ATA_MASTER) ? "master" : "slave",
(error) ? "failed" : "success");
if (error)
break;
pci_write_config(scp->dev, 0x60 + (devno << 2), 0x004367f3, 4);
scp->mode[(device == ATA_MASTER) ? 0 : 1] = ATA_MODE_DMA;
return 0;
}
else {
if (bootverbose)
printf("ata%d: %s: setting PIO mode on Promise chip\n",
scp->lun, (device == ATA_MASTER) ? "master" : "slave");
pci_write_config(scp->dev, 0x60 + (devno << 2), 0x004fe924, 4);
}
break;
case 0x522910b9: /* AcerLabs Aladdin IV/V */
/* the Aladdin has to be setup specially for ATAPI devices */
if ((device == ATA_MASTER && scp->devices & ATA_ATAPI_MASTER) ||
(device == ATA_SLAVE && scp->devices & ATA_ATAPI_SLAVE)) {
int8_t word53 = pci_read_config(scp->dev, 0x53, 1);
/* if needed set atapi fifo & dma */
if ((udmamode >=2) || (wdmamode >= 2 && apiomode >= 4)) {
pci_write_config(scp->dev, 0x53, word53 | 0x03, 1);
scp->flags |= ATA_ATAPI_DMA_RO;
if (device == ATA_MASTER)
outb(scp->bmaddr + ATA_BMSTAT_PORT,
inb(scp->bmaddr + ATA_BMSTAT_PORT) |
ATA_BMSTAT_DMA_MASTER);
else
outb(scp->bmaddr + ATA_BMSTAT_PORT,
inb(scp->bmaddr + ATA_BMSTAT_PORT) |
ATA_BMSTAT_DMA_SLAVE);
}
else {
pci_write_config(scp->dev, 0x53, (word53 & ~0x01) | 0x02, 1);
}
}
if (udmamode >=2) {
int32_t word54 = pci_read_config(scp->dev, 0x54, 4);
error = ata_command(scp, device, ATA_C_SETFEATURES, 0, 0, 0,
ATA_UDMA2, ATA_C_FEA_SETXFER, ATA_IGNORE_INTR);
if (bootverbose)
printf("ata%d: %s: %s setting up UDMA2 mode on Aladdin chip\n",
scp->lun, (device == ATA_MASTER) ? "master" : "slave",
(error) ? "failed" : "success");
if (error)
break;
word54 |= 0x5555;
word54 |= (0x0a << (16 + (scp->unit << 3) + (device << 2)));
pci_write_config(scp->dev, 0x54, word54, 4);
scp->mode[(device == ATA_MASTER) ? 0 : 1] = ATA_MODE_UDMA33;
return 0;
}
else if (wdmamode >= 2 && apiomode >= 4) {
error = ata_command(scp, device, ATA_C_SETFEATURES, 0, 0, 0,
ATA_WDMA2, ATA_C_FEA_SETXFER, ATA_IGNORE_INTR);
if (bootverbose)
printf("ata%d: %s: %s setting up WDMA2 mode on Aladdin chip\n",
scp->lun, (device == ATA_MASTER) ? "master" : "slave",
(error) ? "failed" : "success");
if (error)
break;
scp->mode[(device == ATA_MASTER) ? 0 : 1] = ATA_MODE_DMA;
return 0;
}
break;
default: /* well, we have no support for this, but try anyways */
if (((wdmamode >= 2 && apiomode >= 4) || udmamode >= 2) &&
(inb(scp->bmaddr + ATA_BMSTAT_PORT) &
((device == ATA_MASTER) ?
ATA_BMSTAT_DMA_SLAVE : ATA_BMSTAT_DMA_MASTER))) {
error = ata_command(scp, device, ATA_C_SETFEATURES, 0, 0, 0,
ATA_WDMA2, ATA_C_FEA_SETXFER, ATA_IGNORE_INTR);
if (bootverbose)
printf("ata%d: %s: %s setting up WDMA2 mode on generic chip\n",
scp->lun, (device == ATA_MASTER) ? "master" : "slave",
(error) ? "failed" : "success");
if (error)
break;
scp->mode[(device == ATA_MASTER) ? 0 : 1] = ATA_MODE_DMA;
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_DMADEBUG
printf("ata%d: dmasetup\n", scp->lun);
#endif
if (((uintptr_t)data & 1) || (count & 1))
return -1;
if (!count) {
#ifdef ATA_DMADEBUG
printf("ata%d: zero length DMA transfer attempt on %s\n",
scp->lun, ((device == ATA_MASTER) ? "master" : "slave"));
#endif
return -1;
}
dmatab = scp->dmatab[(device == ATA_MASTER) ? 0 : 1];
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_DMADEBUG
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_DMADEBUG
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_DMADEBUG
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_DMADEBUG
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_DMADEBUG
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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