leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

[PATCH] sata_sil: implement R_ERR on DMA activate FIS errata fix

Browse Source 
Silicon Image has disclosed a new sil3114/3152 errata and workaround
which causes the controller to return R_ERR on DMA activate FIS if the
FIS is received while the next PRD is being fetched.  This patch
implements the workaround.

This errata results in lock up and doesn't trigger if m15w workaround
is in effect.  We stopped applying m15w to 3512 and 3114 in 2.6.14-rc1
which makes 3512/3114 lock up with some drives on all kernel versions
since 2.6.14-rc1 upto now (2.6.16-rc4).  This patch should fix the
regression.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Tejun Heo 2006-02-25 13:52:30 +09:00 committed by Jeff Garzik
parent 0ee304d580
commit e4e10e3e79
1 changed files with 27 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

33
drivers/scsi/sata_sil.c
View File

@ -49,6 +49,7 @@
#define DRV_VERSION "0.9"
enum {
SIL_FLAG_RERR_ON_DMA_ACT = (1 << 29),
SIL_FLAG_MOD15WRITE = (1 << 30),
sil_3112 = 0,
@ -202,7 +203,8 @@ static const struct ata_port_info sil_port_info[] = {
{
.sht = &sil_sht,
.host_flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
ATA_FLAG_SRST | ATA_FLAG_MMIO,
ATA_FLAG_SRST | ATA_FLAG_MMIO |
SIL_FLAG_RERR_ON_DMA_ACT,
.pio_mask = 0x1f, /* pio0-4 */
.mwdma_mask = 0x07, /* mwdma0-2 */
.udma_mask = 0x3f, /* udma0-5 */
@ -212,7 +214,8 @@ static const struct ata_port_info sil_port_info[] = {
{
.sht = &sil_sht,
.host_flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
ATA_FLAG_SRST | ATA_FLAG_MMIO,
ATA_FLAG_SRST | ATA_FLAG_MMIO |
SIL_FLAG_RERR_ON_DMA_ACT,
.pio_mask = 0x1f, /* pio0-4 */
.mwdma_mask = 0x07, /* mwdma0-2 */
.udma_mask = 0x3f, /* udma0-5 */
@ -229,12 +232,13 @@ static const struct {
unsigned long scr; /* SATA control register block */
unsigned long sien; /* SATA Interrupt Enable register */
unsigned long xfer_mode;/* data transfer mode register */
unsigned long sfis_cfg; /* SATA FIS reception config register */
} sil_port[] = {
/* port 0 ... */
{ 0x80, 0x8A, 0x00, 0x100, 0x148, 0xb4 },
{ 0xC0, 0xCA, 0x08, 0x180, 0x1c8, 0xf4 },
{ 0x280, 0x28A, 0x200, 0x300, 0x348, 0x2b4 },
{ 0x2C0, 0x2CA, 0x208, 0x380, 0x3c8, 0x2f4 },
{ 0x80, 0x8A, 0x00, 0x100, 0x148, 0xb4, 0x14c },
{ 0xC0, 0xCA, 0x08, 0x180, 0x1c8, 0xf4, 0x1cc },
{ 0x280, 0x28A, 0x200, 0x300, 0x348, 0x2b4, 0x34c },
{ 0x2C0, 0x2CA, 0x208, 0x380, 0x3c8, 0x2f4, 0x3cc },
/* ... port 3 */
};
@ -484,6 +488,23 @@ static int sil_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
dev_printk(KERN_WARNING, &pdev->dev,
"cache line size not set. Driver may not function\n");
/* Apply R_ERR on DMA activate FIS errata workaround */
if (probe_ent->host_flags & SIL_FLAG_RERR_ON_DMA_ACT) {
int cnt;
for (i = 0, cnt = 0; i < probe_ent->n_ports; i++) {
tmp = readl(mmio_base + sil_port[i].sfis_cfg);
if ((tmp & 0x3) != 0x01)
continue;
if (!cnt)
dev_printk(KERN_INFO, &pdev->dev,
"Applying R_ERR on DMA activate "
"FIS errata fix\n");
writel(tmp & ~0x3, mmio_base + sil_port[i].sfis_cfg);
cnt++;
}
}
if (ent->driver_data == sil_3114) {
irq_mask = SIL_MASK_4PORT;