From: Andy Shevchenko Date: Tue, 17 Nov 2015 11:37:08 +0000 (+0200) Subject: dmaengine: idma64: set maximum allowed segment size for DMA X-Git-Tag: v4.5-rc1~120^2~10^2~2 X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=e3fdb1894cfac6dd4a5bb24d3232fd97ddf74c93;p=linux.git dmaengine: idma64: set maximum allowed segment size for DMA This tells, for example, IOMMU what the maximum size of a segment the DMA controller can send. Signed-off-by: Andy Shevchenko Signed-off-by: Vinod Koul --- diff --git a/drivers/dma/idma64.c b/drivers/dma/idma64.c index 6bba0907c263..97802be31588 100644 --- a/drivers/dma/idma64.c +++ b/drivers/dma/idma64.c @@ -588,6 +588,8 @@ static int idma64_probe(struct idma64_chip *chip) idma64->dma.dev = chip->dev; + dma_set_max_seg_size(idma64->dma.dev, IDMA64C_CTLH_BLOCK_TS_MASK); + ret = dma_async_device_register(&idma64->dma); if (ret) return ret; diff --git a/drivers/dma/idma64.h b/drivers/dma/idma64.h index f6aeff0af8a5..8423f13ed0da 100644 --- a/drivers/dma/idma64.h +++ b/drivers/dma/idma64.h @@ -54,7 +54,8 @@ #define IDMA64C_CTLL_LLP_S_EN (1 << 28) /* src block chain */ /* Bitfields in CTL_HI */ -#define IDMA64C_CTLH_BLOCK_TS(x) ((x) & ((1 << 17) - 1)) +#define IDMA64C_CTLH_BLOCK_TS_MASK ((1 << 17) - 1) +#define IDMA64C_CTLH_BLOCK_TS(x) ((x) & IDMA64C_CTLH_BLOCK_TS_MASK) #define IDMA64C_CTLH_DONE (1 << 17) /* Bitfields in CFG_LO */