sata_mv ncq Fix EDMA configuration
Simplify and fix EDMA configuration setup to match Marvell specificiations.
The chip documentation gives a specific (re)init sequence, which we now follow.
Signed-off-by: Mark Lord <mlord@pobox.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/ata/sata_mv.c b/drivers/ata/sata_mv.c
index 298f17d..f117f6a 100644
--- a/drivers/ata/sata_mv.c
+++ b/drivers/ata/sata_mv.c
@@ -210,6 +210,7 @@
/* SATA registers */
SATA_STATUS_OFS = 0x300, /* ctrl, err regs follow status */
SATA_ACTIVE_OFS = 0x350,
+ SATA_FIS_IRQ_CAUSE_OFS = 0x364,
PHY_MODE3 = 0x310,
PHY_MODE4 = 0x314,
PHY_MODE2 = 0x330,
@@ -222,11 +223,11 @@
/* Port registers */
EDMA_CFG_OFS = 0,
- EDMA_CFG_Q_DEPTH = 0, /* queueing disabled */
- EDMA_CFG_NCQ = (1 << 5),
- EDMA_CFG_NCQ_GO_ON_ERR = (1 << 14), /* continue on error */
- EDMA_CFG_RD_BRST_EXT = (1 << 11), /* read burst 512B */
- EDMA_CFG_WR_BUFF_LEN = (1 << 13), /* write buffer 512B */
+ EDMA_CFG_Q_DEPTH = 0x1f, /* max device queue depth */
+ EDMA_CFG_NCQ = (1 << 5), /* for R/W FPDMA queued */
+ EDMA_CFG_NCQ_GO_ON_ERR = (1 << 14), /* continue on error */
+ EDMA_CFG_RD_BRST_EXT = (1 << 11), /* read burst 512B */
+ EDMA_CFG_WR_BUFF_LEN = (1 << 13), /* write buffer 512B */
EDMA_ERR_IRQ_CAUSE_OFS = 0x8,
EDMA_ERR_IRQ_MASK_OFS = 0xc,
@@ -470,6 +471,8 @@
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 struct scsi_host_template mv5_sht = {
.module = THIS_MODULE,
@@ -834,13 +837,33 @@
* LOCKING:
* Inherited from caller.
*/
-static void mv_start_dma(void __iomem *port_mmio, struct mv_host_priv *hpriv,
+static void mv_start_dma(struct ata_port *ap, void __iomem *port_mmio,
struct mv_port_priv *pp)
{
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);
+ void __iomem *hc_mmio = mv_hc_base_from_port(
+ ap->host->iomap[MV_PRIMARY_BAR], hard_port);
+ u32 hc_irq_cause, ipending;
+
/* clear EDMA event indicators, if any */
writelfl(0, port_mmio + EDMA_ERR_IRQ_CAUSE_OFS);
+ /* clear EDMA interrupt indicator, if any */
+ hc_irq_cause = readl(hc_mmio + HC_IRQ_CAUSE_OFS);
+ ipending = (DEV_IRQ << hard_port) |
+ (CRPB_DMA_DONE << hard_port);
+ if (hc_irq_cause & ipending) {
+ writelfl(hc_irq_cause & ~ipending,
+ hc_mmio + HC_IRQ_CAUSE_OFS);
+ }
+
+ mv_edma_cfg(ap, hpriv, port_mmio);
+
+ /* clear FIS IRQ Cause */
+ writelfl(0, port_mmio + SATA_FIS_IRQ_CAUSE_OFS);
+
mv_set_edma_ptrs(port_mmio, hpriv, pp);
writelfl(EDMA_EN, port_mmio + EDMA_CMD_OFS);
@@ -1025,30 +1048,22 @@
static void mv_edma_cfg(struct ata_port *ap, struct mv_host_priv *hpriv,
void __iomem *port_mmio)
{
- u32 cfg = readl(port_mmio + EDMA_CFG_OFS);
+ u32 cfg;
/* set up non-NCQ EDMA configuration */
- cfg &= ~(1 << 9); /* disable eQue */
+ cfg = EDMA_CFG_Q_DEPTH; /* always 0x1f for *all* chips */
- if (IS_GEN_I(hpriv)) {
- cfg &= ~0x1f; /* clear queue depth */
+ if (IS_GEN_I(hpriv))
cfg |= (1 << 8); /* enab config burst size mask */
- }
- else if (IS_GEN_II(hpriv)) {
- cfg &= ~0x1f; /* clear queue depth */
+ else if (IS_GEN_II(hpriv))
cfg |= EDMA_CFG_RD_BRST_EXT | EDMA_CFG_WR_BUFF_LEN;
- cfg &= ~(EDMA_CFG_NCQ | EDMA_CFG_NCQ_GO_ON_ERR); /* clear 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 << 19); /* dis 128-entry queue (for now?) */
cfg |= (1 << 18); /* enab early completion */
cfg |= (1 << 17); /* enab cut-through (dis stor&forwrd) */
- cfg &= ~(1 << 16); /* dis FIS-based switching (for now) */
- cfg &= ~(EDMA_CFG_NCQ); /* clear NCQ */
}
writelfl(cfg, port_mmio + EDMA_CFG_OFS);
@@ -1370,7 +1385,6 @@
struct ata_port *ap = qc->ap;
void __iomem *port_mmio = mv_ap_base(ap);
struct mv_port_priv *pp = ap->private_data;
- struct mv_host_priv *hpriv = ap->host->private_data;
u32 in_index;
if (qc->tf.protocol != ATA_PROT_DMA) {
@@ -1382,7 +1396,7 @@
return ata_qc_issue_prot(qc);
}
- mv_start_dma(port_mmio, hpriv, pp);
+ mv_start_dma(ap, port_mmio, pp);
in_index = pp->req_idx & MV_MAX_Q_DEPTH_MASK;