Commit 12ee7d3c authored by Mark Lord's avatar Mark Lord Committed by Jeff Garzik

libata sata_qstor nuke idle state

sata_qstor nuke idle state.

We're really only ever in one of two hardware states:  packet, or mmio.
Get rid of unnecessary "qs_state_idle" state.
Signed-off-by: default avatarMark Lord <mlord@pobox.com>
Signed-off-by: default avatarJeff Garzik <jeff@garzik.org>
parent 647c595d
......@@ -103,7 +103,7 @@ enum {
QS_DMA_BOUNDARY = ~0UL
};
typedef enum { qs_state_idle, qs_state_pkt, qs_state_mmio } qs_state_t;
typedef enum { qs_state_mmio, qs_state_pkt } qs_state_t;
struct qs_port_priv {
u8 *pkt;
......@@ -219,7 +219,9 @@ static void qs_irq_clear(struct ata_port *ap)
static inline void qs_enter_reg_mode(struct ata_port *ap)
{
u8 __iomem *chan = qs_mmio_base(ap->host) + (ap->port_no * 0x4000);
struct qs_port_priv *pp = ap->private_data;
pp->state = qs_state_mmio;
writeb(QS_CTR0_REG, chan + QS_CCT_CTR0);
readb(chan + QS_CCT_CTR0); /* flush */
}
......@@ -235,19 +237,12 @@ static inline void qs_reset_channel_logic(struct ata_port *ap)
static void qs_phy_reset(struct ata_port *ap)
{
struct qs_port_priv *pp = ap->private_data;
pp->state = qs_state_idle;
qs_reset_channel_logic(ap);
sata_phy_reset(ap);
}
static void qs_eng_timeout(struct ata_port *ap)
{
struct qs_port_priv *pp = ap->private_data;
if (pp->state != qs_state_idle) /* healthy paranoia */
pp->state = qs_state_mmio;
qs_reset_channel_logic(ap);
ata_eng_timeout(ap);
}
......@@ -406,7 +401,6 @@ static inline unsigned int qs_intr_pkt(struct ata_host *host)
switch (sHST) {
case 0: /* successful CPB */
case 3: /* device error */
pp->state = qs_state_idle;
qs_enter_reg_mode(qc->ap);
qc->err_mask |= ac_err_mask(sDST);
ata_qc_complete(qc);
......@@ -445,7 +439,6 @@ static inline unsigned int qs_intr_mmio(struct ata_host *host)
ap->print_id, qc->tf.protocol, status);
/* complete taskfile transaction */
pp->state = qs_state_idle;
qc->err_mask |= ac_err_mask(status);
ata_qc_complete(qc);
handled = 1;
......@@ -501,7 +494,6 @@ static int qs_port_start(struct ata_port *ap)
rc = ata_port_start(ap);
if (rc)
return rc;
qs_enter_reg_mode(ap);
pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL);
if (!pp)
return -ENOMEM;
......@@ -512,6 +504,7 @@ static int qs_port_start(struct ata_port *ap)
memset(pp->pkt, 0, QS_PKT_BYTES);
ap->private_data = pp;
qs_enter_reg_mode(ap);
addr = (u64)pp->pkt_dma;
writel((u32) addr, chan + QS_CCF_CPBA);
writel((u32)(addr >> 32), chan + QS_CCF_CPBA + 4);
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment