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| author | Tejun Heo <htejun@gmail.com> | 2006-06-26 21:23:52 +0900 |
|---|---|---|
| committer | Jeff Garzik <jeff@garzik.org> | 2006-06-26 21:02:36 -0400 |
| commit | 201ce85946504ea0e6bd9a365de26684b437121e (patch) | |
| tree | ae3eb625c5327f0c34c94fcb0bf9d0230670eb44 /drivers | |
| parent | 88574551b46ba69b0f145d2775006f2e7dfebc84 (diff) | |
| download | lwn-201ce85946504ea0e6bd9a365de26684b437121e.tar.gz lwn-201ce85946504ea0e6bd9a365de26684b437121e.zip | |
[PATCH] sata_sil: disable hotplug interrupts on two ATI IXPs
Some SATA controllers embedded in ATI IXPs seem to have broken
SATA_IRQ bit in their bmdma2 registers which is always stuck at 1.
This makes the driver believe that there has been a hotplug event and
freeze the port whenever there's an interrupt thus failing all
commands.
This patch disables SATA_IRQ for those controllers.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/scsi/sata_sil.c | 29 |
1 files changed, 23 insertions, 6 deletions
diff --git a/drivers/scsi/sata_sil.c b/drivers/scsi/sata_sil.c index 662ad10de288..51d86d750e84 100644 --- a/drivers/scsi/sata_sil.c +++ b/drivers/scsi/sata_sil.c @@ -52,6 +52,7 @@ enum { /* * host flags */ + SIL_FLAG_NO_SATA_IRQ = (1 << 28), SIL_FLAG_RERR_ON_DMA_ACT = (1 << 29), SIL_FLAG_MOD15WRITE = (1 << 30), @@ -62,8 +63,9 @@ enum { * Controller IDs */ sil_3112 = 0, - sil_3512 = 1, - sil_3114 = 2, + sil_3112_no_sata_irq = 1, + sil_3512 = 2, + sil_3114 = 3, /* * Register offsets @@ -123,8 +125,8 @@ static const struct pci_device_id sil_pci_tbl[] = { { 0x1095, 0x3512, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sil_3512 }, { 0x1095, 0x3114, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sil_3114 }, { 0x1002, 0x436e, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sil_3112 }, - { 0x1002, 0x4379, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sil_3112 }, - { 0x1002, 0x437a, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sil_3112 }, + { 0x1002, 0x4379, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sil_3112_no_sata_irq }, + { 0x1002, 0x437a, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sil_3112_no_sata_irq }, { } /* terminate list */ }; @@ -217,6 +219,16 @@ static const struct ata_port_info sil_port_info[] = { .udma_mask = 0x3f, /* udma0-5 */ .port_ops = &sil_ops, }, + /* sil_3112_no_sata_irq */ + { + .sht = &sil_sht, + .host_flags = SIL_DFL_HOST_FLAGS | SIL_FLAG_MOD15WRITE | + SIL_FLAG_NO_SATA_IRQ, + .pio_mask = 0x1f, /* pio0-4 */ + .mwdma_mask = 0x07, /* mwdma0-2 */ + .udma_mask = 0x3f, /* udma0-5 */ + .port_ops = &sil_ops, + }, /* sil_3512 */ { .sht = &sil_sht, @@ -437,6 +449,10 @@ static irqreturn_t sil_interrupt(int irq, void *dev_instance, if (unlikely(!ap || ap->flags & ATA_FLAG_DISABLED)) continue; + /* turn off SATA_IRQ if not supported */ + if (ap->flags & SIL_FLAG_NO_SATA_IRQ) + bmdma2 &= ~SIL_DMA_SATA_IRQ; + if (bmdma2 == 0xffffffff || !(bmdma2 & (SIL_DMA_COMPLETE | SIL_DMA_SATA_IRQ))) continue; @@ -474,8 +490,9 @@ static void sil_thaw(struct ata_port *ap) ata_chk_status(ap); ata_bmdma_irq_clear(ap); - /* turn on SATA IRQ */ - writel(SIL_SIEN_N, mmio_base + sil_port[ap->port_no].sien); + /* turn on SATA IRQ if supported */ + if (!(ap->flags & SIL_FLAG_NO_SATA_IRQ)) + writel(SIL_SIEN_N, mmio_base + sil_port[ap->port_no].sien); /* turn on IRQ */ tmp = readl(mmio_base + SIL_SYSCFG); |