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authorSergei Shtylyov <sergei.shtylyov@cogentembedded.com>2013-05-28 02:45:08 +0400
committerTejun Heo <tj@kernel.org>2013-05-28 09:18:08 +0900
commit8bfbeed58665dbbf63813017712bd0c8e978379e (patch)
tree5e7e95f8563e4e4a8aa072b6aeec8029a339ffd7 /drivers/ata
parent333279c82b984f3eac61feff2b76a8b79e3db6c8 (diff)
downloadlinux-8bfbeed58665dbbf63813017712bd0c8e978379e.tar.bz2
sata_rcar: correct 'sata_rcar_sht'
Using ATA_BMDMA_SHT() to intialize 'sata_rcar_sht' was suboptimal as the R-Car descriptor table transfer counter is 28 bits wide (bit 1 to bit 28), so that the 'dma_boundary' field of 0xFFFF is just too small, as well as the 'sg_tablesize' field of 128. Use ATA_BASE_SHT() to initialize 'sata_rcar_sht' instead and give proper values to the 'dma_boundary' and 'sg_tablesize' fields explicitly. Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'drivers/ata')
-rw-r--r--drivers/ata/sata_rcar.c11
1 files changed, 10 insertions, 1 deletions
diff --git a/drivers/ata/sata_rcar.c b/drivers/ata/sata_rcar.c
index 629b07c452c5..178165be0c32 100644
--- a/drivers/ata/sata_rcar.c
+++ b/drivers/ata/sata_rcar.c
@@ -121,6 +121,8 @@
/* Descriptor table word 0 bit (when DTA32M = 1) */
#define SATA_RCAR_DTEND BIT(0)
+#define SATA_RCAR_DMA_BOUNDARY 0x1FFFFFFEUL
+
struct sata_rcar_priv {
void __iomem *base;
struct clk *clk;
@@ -575,7 +577,14 @@ static u8 sata_rcar_bmdma_status(struct ata_port *ap)
}
static struct scsi_host_template sata_rcar_sht = {
- ATA_BMDMA_SHT(DRV_NAME),
+ ATA_BASE_SHT(DRV_NAME),
+ /*
+ * This controller allows transfer chunks up to 512MB which cross 64KB
+ * boundaries, therefore the DMA limits are more relaxed than standard
+ * ATA SFF.
+ */
+ .sg_tablesize = ATA_MAX_PRD,
+ .dma_boundary = SATA_RCAR_DMA_BOUNDARY,
};
static struct ata_port_operations sata_rcar_port_ops = {