it821x trouble since 2.6.18
From: Christoph Biedl
Date: Sun Jan 14 2007 - 17:48:46 EST
Hi,
There are ITE 8212-based controllers installed in some of my
computers. I had always skipped the build-in RAID things and used them
as plain controllers.
1. Beginning with 2.6.18 there was some trouble, basically slowed data
transfer, sometimes even a totally stalled system (I cannot reproduce
the latter though).
Diffing dmesg of 2.6.17.x and 2.6.18.x (same for 2.6.19):
Probing IDE interface ide2...
hde: SAMSUNG VA34324A, ATA DISK drive
hde: Performing identify fixups.
ide2 at 0xd000-0xd007,0xd402 on irq 10
hde: max request size: 128KiB
-hde: 8446032 sectors (4324 MB) w/478KiB Cache, CHS=14896/9/63, BUG
+hde: 8446032 sectors (4324 MB) w/478KiB Cache, CHS=14896/9/63, BUG DMA OFF
hde:hde: recal_intr: status=0x51 { DriveReady SeekComplete Error }
hde: recal_intr: error=0x04 { DriveStatusError }
ide: failed opcode was: unknown
+hde: irq timeout: status=0xd0 { Busy }
+ide: failed opcode was: unknown
+ide2: reset: master: ECC circuitry error
+hde: recal_intr: status=0x51 { DriveReady SeekComplete Error }
+hde: recal_intr: error=0x04 { DriveStatusError }
+ide: failed opcode was: unknown
hde1 hde2 < hde5 hde6 >
OK, there was "BUG" up to and including 2.6.17 but the disk(s) worked
without any problem.
Not surprisingly the disk throughput was affected by that. Comparing
"hdparm -tT /dev/hde":
2.6.17
/dev/hde:
Timing cached reads: 88 MB in 2.01 seconds = 43.72 MB/sec
Timing buffered disk reads: 26 MB in 3.21 seconds = 8.10 MB/sec
2.6.18
/dev/hde:
Timing cached reads: 90 MB in 2.04 seconds = 44.01 MB/sec
Timing buffered disk reads: 16 MB in 3.14 seconds = 5.10 MB/sec
2. Trying to understand what has happened I found the main difference
is not in the driver but in ide-dma.c:
--- linux-2.6.17.14/drivers/ide/ide-dma.c 2006-06-18 01:49:35.000000000 +0000
+++ linux-2.6.18.6/drivers/ide/ide-dma.c 2006-09-20 03:42:06.000000000 +0000
@@ -752,7 +750,7 @@
goto bug_dma_off;
printk(", DMA");
} else if (id->field_valid & 1) {
- printk(", BUG");
+ goto bug_dma_off;
}
return;
bug_dma_off:
and reverting that change returns the old transfer rates. But that is
probably not a good idea.
3. To increase confusion: I had learned the ite8212 chip is close to
the cmd/sil680, and patching siimage.c had been a solution to get
support for 8212 before it showed up in the kernel.
So I tried this again:
--- ORG/linux-2.6.19.2/drivers/ide/pci/siimage.c 2006-11-29 21:57:37.000000000 +0000
+++ NEW/linux-2.6.19.2/drivers/ide/pci/siimage.c 2007-01-14 17:59:03.000000000 +0000
@@ -52,6 +52,7 @@
case PCI_DEVICE_ID_SII_1210SA:
return 1;
case PCI_DEVICE_ID_SII_680:
+ case PCI_DEVICE_ID_ITE_8212:
return 0;
}
BUG();
@@ -1082,6 +1083,7 @@
static struct pci_device_id siimage_pci_tbl[] = {
{ PCI_VENDOR_ID_CMD, PCI_DEVICE_ID_SII_680, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
+ { PCI_VENDOR_ID_ITE, PCI_DEVICE_ID_ITE_8212, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
#ifdef CONFIG_BLK_DEV_IDE_SATA
{ PCI_VENDOR_ID_CMD, PCI_DEVICE_ID_SII_3112, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 1},
{ PCI_VENDOR_ID_CMD, PCI_DEVICE_ID_SII_1210SA, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 2},
and disabled CONFIG_BLK_DEV_IT821X - and now the disk is even faster
than before:
/dev/hde:
Timing cached reads: 88 MB in 2.01 seconds = 43.71 MB/sec
Timing buffered disk reads: 34 MB in 3.02 seconds = 11.25 MB/sec
So it seems the problem is it82xx.c at least for my controllers.
4. Now there is 2.6.19 and the new ata driver model. So I tried that
one, too:
Booting with
| CONFIG_PATA_IT821X=m
stalls the system upon module load. The last kernel messages were
ata1.00: tag 0 cmd 0xc4 Emask 0x4 stat 0x40 err 0x0 (timeout)
ata1: port failed to respond (30 secs, Status 0xd0)
ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen
ata1.00: tag 0 cmd 0xc4 Emask 0x4 stat 0x40 err 0x0 (timeout)
ata1: port failed to respond (30 secs, Status 0xd0)
ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen
ata1.00: tag 0 cmd 0xc4 Emask 0x4 stat 0x40 err 0x0 (timeout)
ata1: port failed to respond (30 secs, Status 0xd0)
ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen
ata1.00: tag 0 cmd 0xc4 Emask 0x4 stat 0x40 err 0x0 (timeout)
ata1: port failed to respond (30 secs, Status 0xd0)
ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen
ata1.00: tag 0 cmd 0xc4 Emask 0x4 stat 0x40 err 0x0 (timeout)
ata1: port failed to respond (30 secs, Status 0xd0)
ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen
ata1.00: tag 0 cmd 0xc4 Emask 0x4 stat 0x40 err 0x0 (timeout)
ata1: port failed to respond (30 secs, Status 0xd0)
Buffer I/O error on device sda, logical block 0
Patching the sil driver again:
--- ORG/linux-2.6.19.2/drivers/ata/pata_sil680.c 2006-11-29 22:57:37.000000000 +0100
+++ NEW/linux-2.6.19.2/drivers/ata/pata_sil680.c 2007-01-14 21:05:24.000000000 +0100
@@ -349,6 +349,7 @@
static const struct pci_device_id sil680[] = {
{ PCI_VDEVICE(CMD, PCI_DEVICE_ID_SII_680), },
+ { PCI_VDEVICE(ITE, PCI_DEVICE_ID_ITE_8212), },
{ },
};
brings again a fast access:
/dev/sda:
Timing cached reads: 88 MB in 2.01 seconds = 43.73 MB/sec
Timing buffered disk reads: 34 MB in 3.03 seconds = 11.24 MB/sec
although dmesg does not look perfectly well:
pata_sil680 0000:00:0d.0: version 0.3.2
sil680: BA5_EN = 0 clock = 00
sil680: BA5_EN = 0 clock = 00
sil680: 100MHz clock.
PCI: setting IRQ 10 as level-triggered
PCI: Assigned IRQ 10 for device 0000:00:0d.0
PCI: Setting latency timer of device 0000:00:0d.0 to 64
ata1: PATA max UDMA/100 cmd 0xD000 ctl 0xD402 bmdma 0xE000 irq 10
ata2: PATA max UDMA/100 cmd 0xD800 ctl 0xDC02 bmdma 0xE008 irq 10
scsi0 : pata_sil680
ata1.00: ATA-4, max UDMA/33, 8446032 sectors: LBA
ata1.00: Drive reports diagnostics failure. This may indicate a drive
ata1.00: fault or invalid emulation. Contact drive vendor for information.
ata1.00: configured for UDMA/33
scsi1 : pata_sil680
scsi 0:0:0:0: Direct-Access ATA SAMSUNG VA34324A JG10 PQ: 0 ANSI: 5
SCSI device sda: 8446032 512-byte hdwr sectors (4324 MB)
sda: Write Protect is off
sda: Mode Sense: 00 3a 00 00
SCSI device sda: drive cache: write back
SCSI device sda: 8446032 512-byte hdwr sectors (4324 MB)
sda: Write Protect is off
sda: Mode Sense: 00 3a 00 00
SCSI device sda: drive cache: write back
sda: sda1 sda2 < sda5 sda6 >
sd 0:0:0:0: Attached scsi disk sda
5. OK, there's a workaround but I'd really like to avoid such cludges.
Is there anything I could try next?
Christoph
Some more things:
- This is not related to the hard disk. I've also tested others, same
results.
- According to the bios the controller set the mode to UDMA-2 ("U2").
Faster disks are recognized accordingling e.g. "U5" but
using the patched siimage hdparm -i tells that are in udma2 only.
- The it8212_noraid option didn't help either. There is only a single
disk attached.
- The mainboard is a rather old ALI15X3, CPU ist AMDK6 at 366 MHz.
Chances are that different boards do not show such effects.
- The controller's firmware is quite old (1.4.1.6) but update failed.
There are two jumpers but they are not documented.
PS: No need to Cc: me in replies.
-
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