sata_inic162x doesn't use BMDMA anymore. Kill bmdma related stuff.
* prdctl manipulation
* port IRQ mask manipulation
* inherit ATA_BASE_SHT instead of ATA_BMDMA_SHT
* BMDMA methods
Signed-off-by: Tejun Heo <htejun@xxxxxxxxx>
---
drivers/ata/sata_inic162x.c | 103 ++----------------------------------------
1 files changed, 5 insertions(+), 98 deletions(-)
diff --git a/drivers/ata/sata_inic162x.c b/drivers/ata/sata_inic162x.c
index 1f105fe..094b0ed 100644
--- a/drivers/ata/sata_inic162x.c
+++ b/drivers/ata/sata_inic162x.c
@@ -101,9 +101,7 @@ enum {
PIRQ_PENDING = (1 << 7), /* port IRQ pending (STAT only) */
PIRQ_ERR = PIRQ_OFFLINE | PIRQ_ONLINE | PIRQ_FATAL,
-
- PIRQ_MASK_DMA_READ = PIRQ_REPLY | PIRQ_ATA,
- PIRQ_MASK_OTHER = PIRQ_REPLY | PIRQ_COMPLETE,
+ PIRQ_MASK_DEFAULT = PIRQ_REPLY,
PIRQ_MASK_FREEZE = 0xff,
/* PORT_PRD_CTL bits */
@@ -206,13 +204,11 @@ struct inic_port_priv {
dma_addr_t pkt_dma;
u32 *cpb_tbl;
dma_addr_t cpb_tbl_dma;
- u8 dfl_prdctl;
- u8 cached_prdctl;
- u8 cached_pirq_mask;
};
static struct scsi_host_template inic_sht = {
- ATA_BMDMA_SHT(DRV_NAME),
+ ATA_BASE_SHT(DRV_NAME),
+ .sg_tablesize = LIBATA_MAX_PRD, /* maybe it can be larger? */
.dma_boundary = INIC_DMA_BOUNDARY,
};
@@ -227,23 +223,6 @@ static void __iomem *inic_port_base(struct ata_port *ap)
return ap->host->iomap[MMIO_BAR] + ap->port_no * PORT_SIZE;
}
-static void __inic_set_pirq_mask(struct ata_port *ap, u8 mask)
-{
- void __iomem *port_base = inic_port_base(ap);
- struct inic_port_priv *pp = ap->private_data;
-
- writeb(mask, port_base + PORT_IRQ_MASK);
- pp->cached_pirq_mask = mask;
-}
-
-static void inic_set_pirq_mask(struct ata_port *ap, u8 mask)
-{
- struct inic_port_priv *pp = ap->private_data;
-
- if (pp->cached_pirq_mask != mask)
- __inic_set_pirq_mask(ap, mask);
-}
-
static void inic_reset_port(void __iomem *port_base)
{
void __iomem *idma_ctl = port_base + PORT_IDMA_CTL;
@@ -297,63 +276,6 @@ static int inic_scr_write(struct ata_port *ap, unsigned sc_reg, u32 val)
return 0;
}
-/*
- * In TF mode, inic162x is very similar to SFF device. TF registers
- * function the same. DMA engine behaves similary using the same PRD
- * format as BMDMA but different command register, interrupt and event
- * notification methods are used. The following inic_bmdma_*()
- * functions do the impedance matching.
- */
-static void inic_bmdma_setup(struct ata_queued_cmd *qc)
-{
- struct ata_port *ap = qc->ap;
- struct inic_port_priv *pp = ap->private_data;
- void __iomem *port_base = inic_port_base(ap);
- int rw = qc->tf.flags & ATA_TFLAG_WRITE;
-
- /* make sure device sees PRD table writes */
- wmb();
-
- /* load transfer length */
- writel(qc->nbytes, port_base + PORT_PRD_XFERLEN);
-
- /* turn on DMA and specify data direction */
- pp->cached_prdctl = pp->dfl_prdctl | PRD_CTL_DMAEN;
- if (!rw)
- pp->cached_prdctl |= PRD_CTL_WR;
- writeb(pp->cached_prdctl, port_base + PORT_PRD_CTL);
-
- /* issue r/w command */
- ap->ops->sff_exec_command(ap, &qc->tf);
-}
-
-static void inic_bmdma_start(struct ata_queued_cmd *qc)
-{
- struct ata_port *ap = qc->ap;
- struct inic_port_priv *pp = ap->private_data;
- void __iomem *port_base = inic_port_base(ap);
-
- /* start host DMA transaction */
- pp->cached_prdctl |= PRD_CTL_START;
- writeb(pp->cached_prdctl, port_base + PORT_PRD_CTL);
-}
-
-static void inic_bmdma_stop(struct ata_queued_cmd *qc)
-{
- struct ata_port *ap = qc->ap;
- struct inic_port_priv *pp = ap->private_data;
- void __iomem *port_base = inic_port_base(ap);
-
- /* stop DMA engine */
- writeb(pp->dfl_prdctl, port_base + PORT_PRD_CTL);
-}
-
-static u8 inic_bmdma_status(struct ata_port *ap)
-{
- /* event is already verified by the interrupt handler */
- return ATA_DMA_INTR;
-}
-
static void inic_stop_idma(struct ata_port *ap)
{
void __iomem *port_base = inic_port_base(ap);
@@ -631,8 +553,7 @@ static void inic_freeze(struct ata_port *ap)
{
void __iomem *port_base = inic_port_base(ap);
- __inic_set_pirq_mask(ap, PIRQ_MASK_FREEZE);
-
+ writeb(PIRQ_MASK_FREEZE, port_base + PORT_IRQ_MASK);
ap->ops->sff_check_status(ap);
writeb(0xff, port_base + PORT_IRQ_STAT);
}
@@ -643,8 +564,7 @@ static void inic_thaw(struct ata_port *ap)
ap->ops->sff_check_status(ap);
writeb(0xff, port_base + PORT_IRQ_STAT);
-
- __inic_set_pirq_mask(ap, PIRQ_MASK_OTHER);
+ writeb(PIRQ_MASK_DEFAULT, port_base + PORT_IRQ_MASK);
}
static int inic_check_ready(struct ata_link *link)
@@ -713,7 +633,6 @@ static int inic_hardreset(struct ata_link *link, unsigned int *class,
static void inic_error_handler(struct ata_port *ap)
{
void __iomem *port_base = inic_port_base(ap);
- struct inic_port_priv *pp = ap->private_data;
unsigned long flags;
/* reset PIO HSM and stop DMA engine */
@@ -721,7 +640,6 @@ static void inic_error_handler(struct ata_port *ap)
spin_lock_irqsave(ap->lock, flags);
ap->hsm_task_state = HSM_ST_IDLE;
- writeb(pp->dfl_prdctl, port_base + PORT_PRD_CTL);
spin_unlock_irqrestore(ap->lock, flags);
/* PIO and DMA engines have been stopped, perform recovery */
@@ -771,10 +689,8 @@ static int inic_port_resume(struct ata_port *ap)
static int inic_port_start(struct ata_port *ap)
{
- void __iomem *port_base = inic_port_base(ap);
struct device *dev = ap->host->dev;
struct inic_port_priv *pp;
- u8 tmp;
int rc;
/* alloc and initialize private data */
@@ -783,11 +699,6 @@ static int inic_port_start(struct ata_port *ap)
return -ENOMEM;
ap->private_data = pp;
- /* default PRD_CTL value, DMAEN, WR and START off */
- tmp = readb(port_base + PORT_PRD_CTL);
- tmp &= ~(PRD_CTL_DMAEN | PRD_CTL_WR | PRD_CTL_START);
- pp->dfl_prdctl = tmp;
-
/* Alloc resources */
rc = ata_port_start(ap);
if (rc)
@@ -811,10 +722,6 @@ static int inic_port_start(struct ata_port *ap)
static struct ata_port_operations inic_port_ops = {
.inherits = &ata_sff_port_ops,
- .bmdma_setup = inic_bmdma_setup,
- .bmdma_start = inic_bmdma_start,
- .bmdma_stop = inic_bmdma_stop,
- .bmdma_status = inic_bmdma_status,
.qc_prep = inic_qc_prep,
.qc_issue = inic_qc_issue,
.qc_fill_rtf = inic_qc_fill_rtf,
--
1.5.2.4
--
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