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dmaengine: hsu: set maximum allowed segment size for DMA

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This tells, for example, IOMMU what the maximum size of a segment
the DMA controller can send.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit is contained in:
Andy Shevchenko 2016-03-18 14:26:36 +02:00 committed by Vinod Koul
parent c36a0176ba
commit 17b3cf4233
2 changed files with 6 additions and 0 deletions
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2
drivers/dma/hsu/hsu.c
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@ -417,6 +417,8 @@ int hsu_dma_probe(struct hsu_dma_chip *chip)
hsu->dma.dev = chip->dev;
dma_set_max_seg_size(hsu->dma.dev, HSU_CH_DxTSR_MASK);
ret = dma_async_device_register(&hsu->dma);
if (ret)
return ret;

4
drivers/dma/hsu/hsu.h
View File

@ -55,6 +55,10 @@
#define HSU_CH_DCR_CHEI BIT(23)
#define HSU_CH_DCR_CHTOI(x) BIT(24 + (x))
/* Bits in HSU_CH_DxTSR */
#define HSU_CH_DxTSR_MASK GENMASK(15, 0)
#define HSU_CH_DxTSR_TSR(x) ((x) & HSU_CH_DxTSR_MASK)
struct hsu_dma_sg {
dma_addr_t addr;
unsigned int len;