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Diffstat (limited to 'drivers/ata/sata_mv.c')
-rw-r--r--drivers/ata/sata_mv.c58
1 files changed, 48 insertions, 10 deletions
diff --git a/drivers/ata/sata_mv.c b/drivers/ata/sata_mv.c
index 37ae5dc..870dcfd 100644
--- a/drivers/ata/sata_mv.c
+++ b/drivers/ata/sata_mv.c
@@ -1881,6 +1881,39 @@ static u8 mv_bmdma_status(struct ata_port *ap)
return status;
}
+static void mv_rw_multi_errata_sata24(struct ata_queued_cmd *qc)
+{
+ struct ata_taskfile *tf = &qc->tf;
+ /*
+ * Workaround for 88SX60x1 FEr SATA#24.
+ *
+ * Chip may corrupt WRITEs if multi_count >= 4kB.
+ * Note that READs are unaffected.
+ *
+ * It's not clear if this errata really means "4K bytes",
+ * or if it always happens for multi_count > 7
+ * regardless of device sector_size.
+ *
+ * So, for safety, any write with multi_count > 7
+ * gets converted here into a regular PIO write instead:
+ */
+ if ((tf->flags & ATA_TFLAG_WRITE) && is_multi_taskfile(tf)) {
+ if (qc->dev->multi_count > 7) {
+ switch (tf->command) {
+ case ATA_CMD_WRITE_MULTI:
+ tf->command = ATA_CMD_PIO_WRITE;
+ break;
+ case ATA_CMD_WRITE_MULTI_FUA_EXT:
+ tf->flags &= ~ATA_TFLAG_FUA; /* ugh */
+ /* fall through */
+ case ATA_CMD_WRITE_MULTI_EXT:
+ tf->command = ATA_CMD_PIO_WRITE_EXT;
+ break;
+ }
+ }
+ }
+}
+
/**
* mv_qc_prep - Host specific command preparation.
* @qc: queued command to prepare
@@ -1898,17 +1931,24 @@ static void mv_qc_prep(struct ata_queued_cmd *qc)
struct ata_port *ap = qc->ap;
struct mv_port_priv *pp = ap->private_data;
__le16 *cw;
- struct ata_taskfile *tf;
+ struct ata_taskfile *tf = &qc->tf;
u16 flags = 0;
unsigned in_index;
- if ((qc->tf.protocol != ATA_PROT_DMA) &&
- (qc->tf.protocol != ATA_PROT_NCQ))
+ switch (tf->protocol) {
+ case ATA_PROT_DMA:
+ case ATA_PROT_NCQ:
+ break; /* continue below */
+ case ATA_PROT_PIO:
+ mv_rw_multi_errata_sata24(qc);
+ return;
+ default:
return;
+ }
/* Fill in command request block
*/
- if (!(qc->tf.flags & ATA_TFLAG_WRITE))
+ if (!(tf->flags & ATA_TFLAG_WRITE))
flags |= CRQB_FLAG_READ;
WARN_ON(MV_MAX_Q_DEPTH <= qc->tag);
flags |= qc->tag << CRQB_TAG_SHIFT;
@@ -1924,7 +1964,6 @@ static void mv_qc_prep(struct ata_queued_cmd *qc)
pp->crqb[in_index].ctrl_flags = cpu_to_le16(flags);
cw = &pp->crqb[in_index].ata_cmd[0];
- tf = &qc->tf;
/* Sadly, the CRQB cannot accomodate all registers--there are
* only 11 bytes...so we must pick and choose required
@@ -1990,16 +2029,16 @@ static void mv_qc_prep_iie(struct ata_queued_cmd *qc)
struct ata_port *ap = qc->ap;
struct mv_port_priv *pp = ap->private_data;
struct mv_crqb_iie *crqb;
- struct ata_taskfile *tf;
+ struct ata_taskfile *tf = &qc->tf;
unsigned in_index;
u32 flags = 0;
- if ((qc->tf.protocol != ATA_PROT_DMA) &&
- (qc->tf.protocol != ATA_PROT_NCQ))
+ if ((tf->protocol != ATA_PROT_DMA) &&
+ (tf->protocol != ATA_PROT_NCQ))
return;
/* Fill in Gen IIE command request block */
- if (!(qc->tf.flags & ATA_TFLAG_WRITE))
+ if (!(tf->flags & ATA_TFLAG_WRITE))
flags |= CRQB_FLAG_READ;
WARN_ON(MV_MAX_Q_DEPTH <= qc->tag);
@@ -2015,7 +2054,6 @@ static void mv_qc_prep_iie(struct ata_queued_cmd *qc)
crqb->addr_hi = cpu_to_le32((pp->sg_tbl_dma[qc->tag] >> 16) >> 16);
crqb->flags = cpu_to_le32(flags);
- tf = &qc->tf;
crqb->ata_cmd[0] = cpu_to_le32(
(tf->command << 16) |
(tf->feature << 24)
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