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sata_mv pci features

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Some of the GenIIe EDMA optimizations should not be used
for non-PCI (SOC) devices, and nor for certain configurations
of conventional PCI (non PCI-X, PCIe) buses.

Logic taken/simplified from that in the Marvell proprietary driver.

Signed-off-by: Mark Lord <mlord@pobox.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
This commit is contained in:
Mark Lord 2008-05-02 02:08:32 -04:00 committed by Jeff Garzik
parent 8e7decdb8b
commit 616d4a98ad
1 changed files with 36 additions and 3 deletions
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39
drivers/ata/sata_mv.c
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@ -361,6 +361,7 @@ enum {
MV_HP_GEN_II = (1 << 7), /* Generation II: 60xx */
MV_HP_GEN_IIE = (1 << 8), /* Generation IIE: 6042/7042 */
MV_HP_PCIE = (1 << 9), /* PCIe bus/regs: 7042 */
MV_HP_CUT_THROUGH = (1 << 10), /* can use EDMA cut-through */
/* Port private flags (pp_flags) */
MV_PP_FLAG_EDMA_EN = (1 << 0), /* is EDMA engine enabled? */
@ -1110,8 +1111,10 @@ static void mv_edma_cfg(struct ata_port *ap, int want_ncq)
else if (IS_GEN_IIE(hpriv)) {
cfg |= (1 << 23); /* do not mask PM field in rx'd FIS */
cfg |= (1 << 22); /* enab 4-entry host queue cache */
cfg |= (1 << 18); /* enab early completion */
cfg |= (1 << 17); /* enab cut-through (dis stor&forwrd) */
if (HAS_PCI(ap->host))
cfg |= (1 << 18); /* enab early completion */
if (hpriv->hp_flags & MV_HP_CUT_THROUGH)
cfg |= (1 << 17); /* enab cut-thru (dis stor&forwrd) */
if (want_ncq && sata_pmp_attached(ap)) {
cfg |= EDMA_CFG_EDMA_FBS; /* FIS-based switching */
@ -2496,6 +2499,34 @@ static void mv_port_init(struct ata_ioports *port, void __iomem *port_mmio)
readl(port_mmio + EDMA_ERR_IRQ_MASK_OFS));
}
static unsigned int mv_in_pcix_mode(struct ata_host *host)
{
struct mv_host_priv *hpriv = host->private_data;
void __iomem *mmio = hpriv->base;
u32 reg;
if (!HAS_PCI(host) || !IS_PCIE(hpriv))
return 0; /* not PCI-X capable */
reg = readl(mmio + MV_PCI_MODE_OFS);
if ((reg & MV_PCI_MODE_MASK) == 0)
return 0; /* conventional PCI mode */
return 1; /* chip is in PCI-X mode */
}
static int mv_pci_cut_through_okay(struct ata_host *host)
{
struct mv_host_priv *hpriv = host->private_data;
void __iomem *mmio = hpriv->base;
u32 reg;
if (!mv_in_pcix_mode(host)) {
reg = readl(mmio + PCI_COMMAND_OFS);
if (reg & PCI_COMMAND_MRDTRIG)
return 0; /* not okay */
}
return 1; /* okay */
}
static int mv_chip_id(struct ata_host *host, unsigned int board_idx)
{
struct pci_dev *pdev = to_pci_dev(host->dev);
@ -2563,7 +2594,7 @@ static int mv_chip_id(struct ata_host *host, unsigned int board_idx)
break;
case chip_7042:
hp_flags |= MV_HP_PCIE;
hp_flags |= MV_HP_PCIE | MV_HP_CUT_THROUGH;
if (pdev->vendor == PCI_VENDOR_ID_TTI &&
(pdev->device == 0x2300 || pdev->device == 0x2310))
{
@ -2597,6 +2628,8 @@ static int mv_chip_id(struct ata_host *host, unsigned int board_idx)
case chip_6042:
hpriv->ops = &mv6xxx_ops;
hp_flags |= MV_HP_GEN_IIE;
if (board_idx == chip_6042 && mv_pci_cut_through_okay(host))
hp_flags |= MV_HP_CUT_THROUGH;
switch (pdev->revision) {
case 0x0: