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ahci: implement AHCI_HFLAG_NO_PMP 

Of course some controllers lie about PMP support.  Black list them.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Tejun Heo 2007-09-23 13:19:55 +09:00 committed by Jeff Garzik
parent 417a1a6d3d
commit 6949b9148d
1 changed files with 9 additions and 2 deletions
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11
drivers/ata/ahci.c
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@ -176,6 +176,7 @@ enum {
AHCI_HFLAG_32BIT_ONLY = (1 << 3), /* force 32bit */
AHCI_HFLAG_MV_PATA = (1 << 4), /* PATA port */
AHCI_HFLAG_NO_MSI = (1 << 5), /* no PCI MSI */
AHCI_HFLAG_NO_PMP = (1 << 6), /* no PMP */
/* ap->flags bits */
AHCI_FLAG_NO_HOTPLUG = (1 << 24), /* ignore PxSERR.DIAG.N */
@ -357,7 +358,7 @@ static const struct ata_port_info ahci_port_info[] = {
},
/* board_ahci_vt8251 */
{
AHCI_HFLAGS (AHCI_HFLAG_NO_NCQ),
AHCI_HFLAGS (AHCI_HFLAG_NO_NCQ | AHCI_HFLAG_NO_PMP),
.flags = AHCI_FLAG_COMMON,
.link_flags = AHCI_LFLAG_COMMON | ATA_LFLAG_HRST_TO_RESUME,
.pio_mask = 0x1f, /* pio0-4 */
@ -376,7 +377,7 @@ static const struct ata_port_info ahci_port_info[] = {
/* board_ahci_sb600 */
{
AHCI_HFLAGS (AHCI_HFLAG_IGN_SERR_INTERNAL |
AHCI_HFLAG_32BIT_ONLY),
AHCI_HFLAG_32BIT_ONLY | AHCI_HFLAG_NO_PMP),
.flags = AHCI_FLAG_COMMON,
.link_flags = AHCI_LFLAG_COMMON,
.pio_mask = 0x1f, /* pio0-4 */
@ -578,6 +579,12 @@ static void ahci_save_initial_config(struct pci_dev *pdev,
cap &= ~HOST_CAP_NCQ;
}
if ((cap && HOST_CAP_PMP) && (hpriv->flags & AHCI_HFLAG_NO_PMP)) {
dev_printk(KERN_INFO, &pdev->dev,
"controller can't do PMP, turning off CAP_PMP\n");
cap &= ~HOST_CAP_PMP;
}
/*
* Temporary Marvell 6145 hack: PATA port presence
* is asserted through the standard AHCI port