From 8bfbeed58665dbbf63813017712bd0c8e978379e Mon Sep 17 00:00:00 2001 From: Sergei Shtylyov Date: Tue, 28 May 2013 02:45:08 +0400 Subject: 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 Signed-off-by: Tejun Heo --- drivers/ata/sata_rcar.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) (limited to 'drivers/ata') diff --git a/drivers/ata/sata_rcar.c b/drivers/ata/sata_rcar.c index 629b07c452c..178165be0c3 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 = { -- cgit v1.2.3-70-g09d2