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authorMark Lord <liml@rtr.ca>2008-01-26 18:31:33 -0500
committerJeff Garzik <jeff@garzik.org>2008-02-01 11:29:47 -0500
commit721091685f853ba4e6c49f26f989db0b1a811250 (patch)
treeef71c60ad844419ffc3f19c330a64fa6cd36fff8 /drivers/ata/sata_mv.c
parent0c58912e192fc3a4835d772aafa40b72552b819f (diff)
sata_mv ncq Add want ncq parameter for EDMA configuration
An extra EDMA config bit is required for NCQ operation. So set/clear it as needed, and cache current setting in port_priv. For now though, it will always be "off" (0). Signed-off-by: Mark Lord <mlord@pobox.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers/ata/sata_mv.c')
-rw-r--r--drivers/ata/sata_mv.c31
1 files changed, 23 insertions, 8 deletions
diff --git a/drivers/ata/sata_mv.c b/drivers/ata/sata_mv.c
index f117f6a0167..32a0ace5234 100644
--- a/drivers/ata/sata_mv.c
+++ b/drivers/ata/sata_mv.c
@@ -331,6 +331,7 @@ enum {
/* Port private flags (pp_flags) */
MV_PP_FLAG_EDMA_EN = (1 << 0), /* is EDMA engine enabled? */
+ MV_PP_FLAG_NCQ_EN = (1 << 1), /* is EDMA set up for NCQ? */
MV_PP_FLAG_HAD_A_RESET = (1 << 2), /* 1st hard reset complete? */
};
@@ -471,8 +472,9 @@ static void mv6_reset_flash(struct mv_host_priv *hpriv, void __iomem *mmio);
static void mv_reset_pci_bus(struct pci_dev *pdev, void __iomem *mmio);
static void mv_channel_reset(struct mv_host_priv *hpriv, void __iomem *mmio,
unsigned int port_no);
-static void mv_edma_cfg(struct ata_port *ap, struct mv_host_priv *hpriv,
- void __iomem *port_mmio);
+static void mv_edma_cfg(struct mv_port_priv *pp, struct mv_host_priv *hpriv,
+ void __iomem *port_mmio, int want_ncq);
+static int __mv_stop_dma(struct ata_port *ap);
static struct scsi_host_template mv5_sht = {
.module = THIS_MODULE,
@@ -838,8 +840,15 @@ static void mv_set_edma_ptrs(void __iomem *port_mmio,
* Inherited from caller.
*/
static void mv_start_dma(struct ata_port *ap, void __iomem *port_mmio,
- struct mv_port_priv *pp)
+ struct mv_port_priv *pp, u8 protocol)
{
+ int want_ncq = (protocol == ATA_PROT_NCQ);
+
+ if (pp->pp_flags & MV_PP_FLAG_EDMA_EN) {
+ int using_ncq = ((pp->pp_flags & MV_PP_FLAG_NCQ_EN) != 0);
+ if (want_ncq != using_ncq)
+ __mv_stop_dma(ap);
+ }
if (!(pp->pp_flags & MV_PP_FLAG_EDMA_EN)) {
struct mv_host_priv *hpriv = ap->host->private_data;
int hard_port = mv_hardport_from_port(ap->port_no);
@@ -859,7 +868,7 @@ static void mv_start_dma(struct ata_port *ap, void __iomem *port_mmio,
hc_mmio + HC_IRQ_CAUSE_OFS);
}
- mv_edma_cfg(ap, hpriv, port_mmio);
+ mv_edma_cfg(pp, hpriv, port_mmio, want_ncq);
/* clear FIS IRQ Cause */
writelfl(0, port_mmio + SATA_FIS_IRQ_CAUSE_OFS);
@@ -1045,8 +1054,8 @@ static int mv_scr_write(struct ata_port *ap, unsigned int sc_reg_in, u32 val)
return -EINVAL;
}
-static void mv_edma_cfg(struct ata_port *ap, struct mv_host_priv *hpriv,
- void __iomem *port_mmio)
+static void mv_edma_cfg(struct mv_port_priv *pp, struct mv_host_priv *hpriv,
+ void __iomem *port_mmio, int want_ncq)
{
u32 cfg;
@@ -1066,6 +1075,12 @@ static void mv_edma_cfg(struct ata_port *ap, struct mv_host_priv *hpriv,
cfg |= (1 << 17); /* enab cut-through (dis stor&forwrd) */
}
+ if (want_ncq) {
+ cfg |= EDMA_CFG_NCQ;
+ pp->pp_flags |= MV_PP_FLAG_NCQ_EN;
+ } else
+ pp->pp_flags &= ~MV_PP_FLAG_NCQ_EN;
+
writelfl(cfg, port_mmio + EDMA_CFG_OFS);
}
@@ -1128,7 +1143,7 @@ static int mv_port_start(struct ata_port *ap)
spin_lock_irqsave(&ap->host->lock, flags);
- mv_edma_cfg(ap, hpriv, port_mmio);
+ mv_edma_cfg(pp, hpriv, port_mmio, 0);
mv_set_edma_ptrs(port_mmio, hpriv, pp);
@@ -1396,7 +1411,7 @@ static unsigned int mv_qc_issue(struct ata_queued_cmd *qc)
return ata_qc_issue_prot(qc);
}
- mv_start_dma(ap, port_mmio, pp);
+ mv_start_dma(ap, port_mmio, pp, qc->tf.protocol);
in_index = pp->req_idx & MV_MAX_Q_DEPTH_MASK;