diff options
| author | Arnd Hannemann <arnd@arndnet.de> | 2012-08-17 10:11:15 +0200 |
|---|---|---|
| committer | Jeff Garzik <jgarzik@redhat.com> | 2012-08-17 19:26:51 +0200 |
| commit | 1117c811a64d948c9f88ee80a0c7f35e9fea1d69 (patch) | |
| tree | d42fe642ad49ee07335e0004ec725f7821bfbd9c | |
| parent | ahci: un-staticize ahci_dev_classify (diff) | |
| download | linux-1117c811a64d948c9f88ee80a0c7f35e9fea1d69.tar.xz linux-1117c811a64d948c9f88ee80a0c7f35e9fea1d69.zip | |
pata_atiixp: override cable detection on MSI E350DM-E33
The mainboard MSI E350DM-E33 is advertised with 6 SATA ports.
As it turns out, two of them seem to be driven by on-board
SATA<->PATA converters. If a disk drive is connected to one
of them kernel uses UDMA/33 mode due to cable detection:
[ 34.550823] scsi4 : pata_atiixp
[ 34.555517] scsi5 : pata_atiixp
[ 34.555942] ata5: PATA max UDMA/100 cmd 0x1f0 ctl 0x3f6 bmdma 0xf100 irq 14
[ 34.555948] ata6: PATA max UDMA/100 cmd 0x170 ctl 0x376 bmdma 0xf108 irq 15
...
[ 35.040799] ata5.00: ATA-8: WDC WD20EADS-00R6B0, 01.00A01, max UDMA/133
[ 35.040806] ata5.00: 3907029168 sectors, multi 16: LBA48 NCQ (depth 0/32)
[ 35.040817] ata5.00: limited to UDMA/33 due to 40-wire cable
[ 35.049166] ata5.00: configured for UDMA/33
[ 35.049402] scsi 4:0:0:0: Direct-Access ATA WDC WD20EADS-00R 01.0 PQ: 0 ANSI: 5
This patch forces "short cable" mode on this board, as it seems clear that
the on-board SATA<->PATA "cable" is short.
With this patch the disk is configured for UDMA/100:
[ 5.976756] ata5.00: ATA-8: WDC WD20EADS-00R6B0, 01.00A01, max UDMA/133
[ 5.996434] ata5.00: 3907029168 sectors, multi 16: LBA48 NCQ (depth 0/32)
[ 6.024787] ata5.00: configured for UDMA/100
Testing revealed no transfer issues.
Signed-off-by: Arnd Hannemann <arnd@arndnet.de>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
| -rw-r--r-- | drivers/ata/pata_atiixp.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/ata/pata_atiixp.c b/drivers/ata/pata_atiixp.c index 361c75cea57b..24e51056ac26 100644 --- a/drivers/ata/pata_atiixp.c +++ b/drivers/ata/pata_atiixp.c @@ -20,6 +20,7 @@ #include <linux/delay.h> #include <scsi/scsi_host.h> #include <linux/libata.h> +#include <linux/dmi.h> #define DRV_NAME "pata_atiixp" #define DRV_VERSION "0.4.6" @@ -33,11 +34,26 @@ enum { ATIIXP_IDE_UDMA_MODE = 0x56 }; +static const struct dmi_system_id attixp_cable_override_dmi_table[] = { + { + /* Board has onboard PATA<->SATA converters */ + .ident = "MSI E350DM-E33", + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "MSI"), + DMI_MATCH(DMI_BOARD_NAME, "E350DM-E33(MS-7720)"), + }, + }, + { } +}; + static int atiixp_cable_detect(struct ata_port *ap) { struct pci_dev *pdev = to_pci_dev(ap->host->dev); u8 udma; + if (dmi_check_system(attixp_cable_override_dmi_table)) + return ATA_CBL_PATA40_SHORT; + /* Hack from drivers/ide/pci. Really we want to know how to do the raw detection not play follow the bios mode guess */ pci_read_config_byte(pdev, ATIIXP_IDE_UDMA_MODE + ap->port_no, &udma); |