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authorMark Lord <liml@rtr.ca>2009-01-30 18:47:51 -0500
committerJeff Garzik <jgarzik@redhat.com>2009-03-24 22:02:38 -0400
commit00b81235aa0368f84c0e704bec4142cd8c516ad5 (patch)
treefcb89d62f439d7233a926ff79800f598a68680e8 /drivers/ata
parent91b1a84c10869e2e46a576e5367de3166bff8ecc (diff)
sata_mv: rearrange mv_start_dma() and friends
Rearrange mv_start_dma() and friends, in preparation for adding non-EDMA DMA modes, and non-EDMA interrupts, to the driver. Signed-off-by: Mark Lord <mlord@pobox.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Diffstat (limited to 'drivers/ata')
-rw-r--r--drivers/ata/sata_mv.c66
1 files changed, 38 insertions, 28 deletions
diff --git a/drivers/ata/sata_mv.c b/drivers/ata/sata_mv.c
index 3dc35543fb3..fb3288bbd9f 100644
--- a/drivers/ata/sata_mv.c
+++ b/drivers/ata/sata_mv.c
@@ -536,7 +536,7 @@ static void mv_reset_channel(struct mv_host_priv *hpriv, void __iomem *mmio,
unsigned int port_no);
static int mv_stop_edma(struct ata_port *ap);
static int mv_stop_edma_engine(void __iomem *port_mmio);
-static void mv_edma_cfg(struct ata_port *ap, int want_ncq);
+static void mv_edma_cfg(struct ata_port *ap, int want_ncq, int want_edma);
static void mv_pmp_select(struct ata_port *ap, int pmp);
static int mv_pmp_hardreset(struct ata_link *link, unsigned int *class,
@@ -849,8 +849,32 @@ static void mv_enable_port_irqs(struct ata_port *ap,
mv_set_main_irq_mask(ap->host, disable_bits, enable_bits);
}
+static void mv_clear_and_enable_port_irqs(struct ata_port *ap,
+ void __iomem *port_mmio,
+ unsigned int port_irqs)
+{
+ struct mv_host_priv *hpriv = ap->host->private_data;
+ int hardport = mv_hardport_from_port(ap->port_no);
+ void __iomem *hc_mmio = mv_hc_base_from_port(
+ mv_host_base(ap->host), ap->port_no);
+ u32 hc_irq_cause;
+
+ /* clear EDMA event indicators, if any */
+ writelfl(0, port_mmio + EDMA_ERR_IRQ_CAUSE_OFS);
+
+ /* clear pending irq events */
+ hc_irq_cause = ~((DEV_IRQ | DMA_IRQ) << hardport);
+ writelfl(hc_irq_cause, hc_mmio + HC_IRQ_CAUSE_OFS);
+
+ /* clear FIS IRQ Cause */
+ if (IS_GEN_IIE(hpriv))
+ writelfl(0, port_mmio + SATA_FIS_IRQ_CAUSE_OFS);
+
+ mv_enable_port_irqs(ap, port_irqs);
+}
+
/**
- * mv_start_dma - Enable eDMA engine
+ * mv_start_edma - Enable eDMA engine
* @base: port base address
* @pp: port private data
*
@@ -860,7 +884,7 @@ static void mv_enable_port_irqs(struct ata_port *ap,
* LOCKING:
* Inherited from caller.
*/
-static void mv_start_dma(struct ata_port *ap, void __iomem *port_mmio,
+static void mv_start_edma(struct ata_port *ap, void __iomem *port_mmio,
struct mv_port_priv *pp, u8 protocol)
{
int want_ncq = (protocol == ATA_PROT_NCQ);
@@ -872,26 +896,11 @@ static void mv_start_dma(struct ata_port *ap, void __iomem *port_mmio,
}
if (!(pp->pp_flags & MV_PP_FLAG_EDMA_EN)) {
struct mv_host_priv *hpriv = ap->host->private_data;
- int hardport = mv_hardport_from_port(ap->port_no);
- void __iomem *hc_mmio = mv_hc_base_from_port(
- mv_host_base(ap->host), ap->port_no);
- u32 hc_irq_cause;
-
- /* clear EDMA event indicators, if any */
- writelfl(0, port_mmio + EDMA_ERR_IRQ_CAUSE_OFS);
-
- /* clear pending irq events */
- hc_irq_cause = ~((DEV_IRQ | DMA_IRQ) << hardport);
- writelfl(hc_irq_cause, hc_mmio + HC_IRQ_CAUSE_OFS);
- mv_edma_cfg(ap, want_ncq);
-
- /* clear FIS IRQ Cause */
- if (IS_GEN_IIE(hpriv))
- writelfl(0, port_mmio + SATA_FIS_IRQ_CAUSE_OFS);
+ mv_edma_cfg(ap, want_ncq, 1);
mv_set_edma_ptrs(port_mmio, hpriv, pp);
- mv_enable_port_irqs(ap, DONE_IRQ|ERR_IRQ);
+ mv_clear_and_enable_port_irqs(ap, port_mmio, DONE_IRQ|ERR_IRQ);
writelfl(EDMA_EN, port_mmio + EDMA_CMD_OFS);
pp->pp_flags |= MV_PP_FLAG_EDMA_EN;
@@ -1173,7 +1182,7 @@ static void mv_60x1_errata_sata25(struct ata_port *ap, int want_ncq)
writel(new, hpriv->base + MV_GPIO_PORT_CTL_OFS);
}
-static void mv_edma_cfg(struct ata_port *ap, int want_ncq)
+static void mv_edma_cfg(struct ata_port *ap, int want_ncq, int want_edma)
{
u32 cfg;
struct mv_port_priv *pp = ap->private_data;
@@ -1182,7 +1191,7 @@ static void mv_edma_cfg(struct ata_port *ap, int want_ncq)
/* set up non-NCQ EDMA configuration */
cfg = EDMA_CFG_Q_DEPTH; /* always 0x1f for *all* chips */
- pp->pp_flags &= ~MV_PP_FLAG_FBS_EN;
+ pp->pp_flags &= ~(MV_PP_FLAG_FBS_EN | MV_PP_FLAG_NCQ_EN);
if (IS_GEN_I(hpriv))
cfg |= (1 << 8); /* enab config burst size mask */
@@ -1211,9 +1220,11 @@ static void mv_edma_cfg(struct ata_port *ap, int want_ncq)
}
cfg |= (1 << 23); /* do not mask PM field in rx'd FIS */
- cfg |= (1 << 22); /* enab 4-entry host queue cache */
- if (!IS_SOC(hpriv))
- cfg |= (1 << 18); /* enab early completion */
+ if (want_edma) {
+ cfg |= (1 << 22); /* enab 4-entry host queue cache */
+ if (!IS_SOC(hpriv))
+ cfg |= (1 << 18); /* enab early completion */
+ }
if (hpriv->hp_flags & MV_HP_CUT_THROUGH)
cfg |= (1 << 17); /* enab cut-thru (dis stor&forwrd) */
}
@@ -1221,8 +1232,7 @@ static void mv_edma_cfg(struct ata_port *ap, int want_ncq)
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);
}
@@ -1591,7 +1601,7 @@ static unsigned int mv_qc_issue(struct ata_queued_cmd *qc)
return ata_sff_qc_issue(qc);
}
- mv_start_dma(ap, port_mmio, pp, qc->tf.protocol);
+ mv_start_edma(ap, port_mmio, pp, qc->tf.protocol);
pp->req_idx = (pp->req_idx + 1) & MV_MAX_Q_DEPTH_MASK;
in_index = pp->req_idx << EDMA_REQ_Q_PTR_SHIFT;