lkml.org 
[lkml]   [2005]   [Dec]   [31]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: Possible bug in amd64-agp (agpgart module)
Hi all,

Some more info regarding my uphill battle with my machine :)

Ochal Christophe wrote:

> Hi all,
>
> Sorry for the intrusion, but i think i've stumbled across a bug in the
> linux kernel.
> On an Asus KV8-S XE motherboard, the agpgart module is unable to
> properly determine the AGP aperture size, regardless of bios options
> (AGP 8x mode & AGP 4x mode), this *might* also be related to possible
> hangs in X11 when using DRI.
>
> Bug was seen on the following config:
>
> Asus K8V-S XE motherboard, 512MB ram with AMD Sempron 3200 (Athlon64
> core)
> Witnessed with an ATI Radeon 9700 Pro card and with an Asus Radeon
> 9200 SE.
>
> I'll try & test this config with some more gfx cards to see if the gfx
> card has any influence on the detection, but i'm not sure i have any
> nVidia cards available.
>
> This phenomenon has been found in atleast the following kernel versions:
>
> linux 2.6.12-r9
> linux 2.6.14-r4
> linux 2.6.14-r5
> linux 2.6.14-r7
>
> The reported aperture size is always 32M, more details can be
> provided, just ask what you need to know.

Some more info, might be worthwhile for the people in the know:

Motherboard: Asus K8V-X SE
lspci:
00:00.0 Host bridge: VIA Technologies, Inc. K8T800Pro Host Bridge
00:00.1 Host bridge: VIA Technologies, Inc. K8T800Pro Host Bridge
00:00.2 Host bridge: VIA Technologies, Inc. K8T800Pro Host Bridge
00:00.3 Host bridge: VIA Technologies, Inc. K8T800Pro Host Bridge
00:00.4 Host bridge: VIA Technologies, Inc. K8T800Pro Host Bridge
00:00.7 Host bridge: VIA Technologies, Inc. K8T800Pro Host Bridge
00:01.0 PCI bridge: VIA Technologies, Inc. VT8237 PCI bridge
[K8T800/K8T890 South]
00:0f.0 RAID bus controller: VIA Technologies, Inc. VIA VT6420 SATA RAID
Controller (rev 80)
00:0f.1 IDE interface: VIA Technologies, Inc.
VT82C586A/B/VT82C686/A/B/VT823x/A/C PIPC Bus Master IDE (rev 06)
00:10.0 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1
Controller (rev 81)
00:10.1 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1
Controller (rev 81)
00:10.2 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1
Controller (rev 81)
00:10.3 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1
Controller (rev 81)
00:10.4 USB Controller: VIA Technologies, Inc. USB 2.0 (rev 86)
00:11.0 ISA bridge: VIA Technologies, Inc. VT8237 ISA bridge
[KT600/K8T800/K8T890 South]
00:11.5 Multimedia audio controller: VIA Technologies, Inc.
VT8233/A/8235/8237 AC97 Audio Controller (rev 60)
00:12.0 Ethernet controller: VIA Technologies, Inc. VT6102 [Rhine-II]
(rev 78)
00:18.0 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron]
HyperTransport Technology Configuration
00:18.1 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron]
Address Map
00:18.2 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron]
DRAM Controller
00:18.3 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron]
Miscellaneous Control
01:00.0 VGA compatible controller: ATI Technologies Inc Radeon R300 ND
[Radeon 9700 Pro]
01:00.1 Display controller: ATI Technologies Inc Radeon R300 [Radeon
9700 Pro] (Secondary)
Distribution:
Gentoo with kernel: 2.6.13-gentoo-r5

Problem witnessed with multiple kernels (see prior post), regardless of
BIOS settings.

Test results of testgart.c:

localhost ochal # ./test
version: 0.101
bridge id: 0x2821106
agp_mode: 0x1f000a1b
aper_base: 0xe4000000
aper_size: 32
pg_total: 112384
pg_system: 112384
pg_used: 0
entry.key : 0
entry.key : 1
Allocated 8 megs of GART memory
MemoryBenchmark: 8 mb/s
MemoryBenchmark: 8 mb/s
MemoryBenchmark: 9 mb/s
Average speed: 8 mb/s
Testing data integrity (1st pass): failed on first pass!
Testing data integrity (2nd pass): failed on second pass!
dmesg:
Linux agpgart interface v0.101 (c) Dave Jones
fglrx: module license 'Proprietary. (C) 2002 - ATI Technologies,
Starnberg, GERMANY' taints kernel.
[fglrx] Maximum main memory to use for locked dma buffers: 430 MBytes.
ACPI: PCI Interrupt 0000:01:00.0[A] -> GSI 16 (level, low) -> IRQ 201
[fglrx] module loaded - fglrx 8.20.8 [Dec 6 2005] on minor 0
[fglrx] ACPI power management is initialized.
Fire GL agpgart support
fglrx_agp is probing for an AGP device
Device found = 1106
failed pci_module_init
Unloading fglrx_agp
firegl_agp_probe failed
[fglrx] Failed to load fglrx_agp module
[fglrx] Error code 256
[fglrx] Failed to load ATI module agpgart
[fglrx] Fallback to internal agpgart module
Fire GL built-in AGP-support
Based on agpgart interface v0.99 (c) Jeff Hartmann
agpgart: Maximum main memory to use for agp memory: 439M
agpgart: Unsupported Via chipset (device id: 0282), you might want to
try agp_try_unsupported=1.
agpgart: no supported devices found.
[fglrx] Initialization of built-in AGP-support failed (ret=-19).
[fglrx:firegl_unlock] *ERROR* Process 5366 using kernel context 0
scsi: unknown opcode 0xe9
scsi: unknown opcode 0xed
scsi: unknown opcode 0x01
scsi: unknown opcode 0xf5
hda: packet command error: status=0x51 { DriveReady SeekComplete Error }
hda: packet command error: error=0x54 { AbortedCommand
LastFailedSense=0x05 }
ide: failed opcode was: unknown
hda: packet command error: status=0x51 { DriveReady SeekComplete Error }
hda: packet command error: error=0x54 { AbortedCommand
LastFailedSense=0x05 }
ide: failed opcode was: unknown
agpgart: Detected AGP bridge 0
agpgart: AGP aperture is 32M @ 0xe4000000
agpgart: Found an AGP 3.0 compliant device at 0000:00:00.0.
agpgart: test tried to set rate=x12. Setting to AGP3 x8 mode.
agpgart: Putting AGP V3 device at 0000:00:00.0 into 8x mode
agpgart: Putting AGP V3 device at 0000:01:00.0 into 8x mode
agpgart: Found an AGP 3.0 compliant device at 0000:00:00.0.
agpgart: test tried to set rate=x12. Setting to AGP3 x8 mode.
agpgart: Putting AGP V3 device at 0000:00:00.0 into 8x mode
agpgart: Putting AGP V3 device at 0000:01:00.0 into 8x mode

The testgart.c code:

/*
*
* Test program for AGPGART module under Linux
*
* Copyright (C) 1999 Jeff Hartmann,
* Precision Insight, Inc., Xi Graphics, Inc.
*
*/

#include <stdio.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <fcntl.h>
#include <sys/mman.h>
#include <sys/time.h>
#include <linux/types.h>
#include <linux/agpgart.h>
#include <asm/mtrr.h>
#include <errno.h>

unsigned char *gart;
int gartfd;
int mtrr;

int usec( void ) {
struct timeval tv;
struct timezone tz;
gettimeofday( &tv, &tz );
return (tv.tv_sec & 2047) * 1000000 + tv.tv_usec;
}
int MemoryBenchmark( void *buffer, int dwords ) {
int i;
int start, end;
int mb;
int *base;
base = (int *)buffer;
start = usec();
for ( i = 0 ; i < dwords ; i += 8 ) {
base[i] =
base[i+1] =
base[i+2] =
base[i+3] =
base[i+4] =
base[i+5] =
base[i+6] =
base[i+7] = 0x15151515; /* dmapad nops */
}
end = usec();
mb = ( (float)dwords / 0x40000 ) * 1000000 / (end - start);
printf("MemoryBenchmark: %i mb/s\n", mb );
return mb;
}
int insert_gart(int page, int size)
{
agp_allocate entry;
agp_bind bind;
entry.type = 0;
entry.pg_count = size;
#ifdef DEBUG
printf("Using AGPIOC_ALLOCATE\n");
#endif
if(ioctl(gartfd, AGPIOC_ALLOCATE, &entry) != 0)
{
perror("ioctl(AGPIOC_ALLOCATE)");
exit(1);
}
bind.key = entry.key;
bind.pg_start = page;
#ifdef DEBUG
printf("Using AGPIOC_BIND\n");
#endif
if(ioctl(gartfd, AGPIOC_BIND, &bind))
{
perror("ioctl(AGPIOC_BIND)");
exit(1);
}
printf("entry.key : %i\n", entry.key);

return(entry.key);
}
int unbind_gart(int key)
{
agp_unbind unbind;
unbind.key = key;
#ifdef DEBUG
printf("Using AGPIOC_UNBIND\n");
#endif
if(ioctl(gartfd, AGPIOC_UNBIND, &unbind) != 0)
{
perror("ioctl(AGPIOC_UNBIND)");
exit(1);
}
return(0);
}
int bind_gart(int key, int page)
{
agp_bind bind;
bind.key = key;
bind.pg_start = page;
#ifdef DEBUG
printf("Using AGPIOC_BIND\n");
#endif
if(ioctl(gartfd, AGPIOC_BIND, &bind) != 0)
{
perror("ioctl(AGPIOC_BIND)");
exit(1);
}
return(0);
}
int remove_gart(int key)
{
#ifdef DEBUG
printf("Using AGPIOC_DEALLOCATE\n");
#endif
if(ioctl(gartfd, AGPIOC_DEALLOCATE, key) != 0)
{
perror("ioctl(GARTIOCREMOVE)");
exit(1);
}
return(0);
}
void openmtrr(void)
{
if ((mtrr = open("/proc/mtrr", O_WRONLY, 0)) == -1)
{
if (errno == ENOENT) {
perror("/proc/mtrr not found: MTRR not enabled\n");
} else {
perror("Error opening /proc/mtrr:");
perror("MTRR not enabled\n");
exit(1);
}
return;
}
}
int CoverRangeWithMTRR( int base, int range, int type )
{
int count;
/* set it if we aren't just checking the number */
if ( type != -1 ) {
struct mtrr_sentry sentry;
sentry.base = base;
sentry.size = range;
sentry.type = type;

if ( ioctl(mtrr, MTRRIOC_ADD_ENTRY, &sentry) == -1 ) {
perror("mtrr");
exit(1);
}
}
}
int init_agp(void)
{
agp_info info;
agp_setup setup;
#ifdef DEBUG
printf("Using AGPIOC_ACQUIRE\n");
#endif
if(ioctl(gartfd, AGPIOC_ACQUIRE) != 0)
{
perror("ioctl(AGPIOC_ACQUIRE)");
exit(1);
}
#ifdef DEBUG
printf("Using AGPIOC_INFO\n");
#endif
if(ioctl(gartfd, AGPIOC_INFO, &info) != 0)
{
perror("ioctl(AGPIOC_INFO)");
exit(1);
}
printf("version: %i.%i\n", info.version.major, info.version.minor);
printf("bridge id: 0x%lx\n", info.bridge_id);
printf("agp_mode: 0x%lx\n", info.agp_mode);
printf("aper_base: 0x%lx\n", info.aper_base);
printf("aper_size: %i\n", info.aper_size);
printf("pg_total: %i\n", info.pg_total);
printf("pg_system: %i\n", info.pg_system);
printf("pg_used: %i\n", info.pg_used);

openmtrr();
if (mtrr != -1) {
CoverRangeWithMTRR(info.aper_base, info.aper_size * 0x100000,
MTRR_TYPE_WRCOMB);
}
gart = mmap(NULL, info.aper_size * 0x100000, PROT_READ | PROT_WRITE, MAP_SHARED, gartfd, 0);
if(gart == (unsigned char *) 0xffffffff)
{
perror("mmap");
close(gartfd);
exit(1);
}
setup.agp_mode = info.agp_mode;
#ifdef DEBUG
printf("Using AGPIOC_SETUP\n");
#endif
if(ioctl(gartfd, AGPIOC_SETUP, &setup) != 0)
{
perror("ioctl(AGPIOC_SETUP)");
exit(1);
}
return(0);
}
int xchangeDummy;

void FlushWriteCombining( void ) {
__asm__ volatile( " push %%eax ; xchg %%eax, %0 ; pop %%eax" : : "m" (xchangeDummy));
__asm__ volatile( " push %%eax ; push %%ebx ; push %%ecx ; push %%edx ; movl $0,%%eax ; cpuid ; pop %%edx ; pop %%ecx ; pop %%ebx ; pop %%eax" : /* no outputs */ : /* no inputs */ );
}
void BenchMark()
{
int i, worked = 1;
i = MemoryBenchmark(gart, (1024 * 1024 * 4) / 4) +
MemoryBenchmark(gart, (1024 * 1024 * 4) / 4) +
MemoryBenchmark(gart, (1024 * 1024 * 4) / 4);

printf("Average speed: %i mb/s\n", i /3);

printf("Testing data integrity (1st pass): ");
fflush(stdout);

FlushWriteCombining();

for (i=0; i < 8 * 0x100000; i++)
{
gart[i] = i % 256;
}
FlushWriteCombining();


for (i=0; i < 8 * 0x100000; i++)
{
if(!(gart[i] == i % 256))
{
#ifdef DEBUG
printf("failed on %i, gart[i] = %i\n", i, gart[i]);
#endif
worked = 0;
}
}
if (!worked)
printf("failed on first pass!\n");
else
printf("passed on first pass.\n");
unbind_gart(0);
unbind_gart(1);
bind_gart(0, 0);
bind_gart(1, 1024);

worked = 1;
printf("Testing data integrity (2nd pass): ");
fflush(stdout);

for (i=0; i < 8 * 0x100000; i++)
{
if(!(gart[i] == i % 256))
{
#ifdef DEBUG
printf("failed on %i, gart[i] = %i\n", i, gart[i]);
#endif
worked = 0;
}
}
if (!worked)
printf("failed on second pass!\n");
else
printf("passed on second pass.\n");
}
int main()
{
int i;
int key;
int key2;
agp_info info;
gartfd = open("/dev/agpgart", O_RDWR);
if (gartfd == -1)
{
perror("open");
exit(1);
}
init_agp();

key = insert_gart(0, 1024);
key2 = insert_gart(1024, 1024);

#ifdef DEBUG
printf("Using AGPIOC_INFO\n");
if(ioctl(gartfd, AGPIOC_INFO, &info) != 0)
{
perror("ioctl(AGPIOC_INFO)");
exit(1);
}
printf("version: %i.%i\n", info.version.major, info.version.minor);
printf("bridge id: 0x%lx\n", info.bridge_id);
printf("agp_mode: 0x%lx\n", info.agp_mode);
printf("aper_base: 0x%lx\n", info.aper_base);
printf("aper_size: %i\n", info.aper_size);
printf("pg_total: %i\n", info.pg_total);
printf("pg_system: %i\n", info.pg_system);
printf("pg_used: %i\n", info.pg_used);
#endif

printf("Allocated 8 megs of GART memory\n");

BenchMark();

remove_gart(key);
remove_gart(key2);

#ifdef DEBUG
printf("Using AGPIOC_RELEASE\n");
#endif
if(ioctl(gartfd, AGPIOC_RELEASE) != 0)
{
perror("ioctl(AGPIOC_RELEASE)");
exit(1);
}
close(gartfd);
}

I don't know how correct this test program is, i'm willing to test the
hell out of this.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-12-31 17:16    [from the cache]
©2003-2014 Jasper Spaans. Advertise on this site