diff options
| author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2016-03-18 14:26:36 +0200 |
|---|---|---|
| committer | Vinod Koul <vinod.koul@intel.com> | 2016-04-04 09:42:00 -0700 |
| commit | 17b3cf4233d77698df0e5ff39303c145ac355d6a (patch) | |
| tree | 4bb92300c5afd6b07eb9213caae2e9e307fe1858 /drivers/dma/hsu | |
| parent | c36a0176ba678fd1a4bf985fd62f43dd4f4d4a03 (diff) | |
| download | linux-17b3cf4233d77698df0e5ff39303c145ac355d6a.tar.bz2 | |
dmaengine: hsu: 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 <andriy.shevchenko@linux.intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'drivers/dma/hsu')
| -rw-r--r-- | drivers/dma/hsu/hsu.c | 2 | ||||
| -rw-r--r-- | drivers/dma/hsu/hsu.h | 4 |
2 files changed, 6 insertions, 0 deletions
diff --git a/drivers/dma/hsu/hsu.c b/drivers/dma/hsu/hsu.c index 1817b7bc9576..59d1e7c6fd0f 100644 --- a/drivers/dma/hsu/hsu.c +++ b/drivers/dma/hsu/hsu.c @@ -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; diff --git a/drivers/dma/hsu/hsu.h b/drivers/dma/hsu/hsu.h index 578a8ee8cd05..50a9d1bda253 100644 --- a/drivers/dma/hsu/hsu.h +++ b/drivers/dma/hsu/hsu.h @@ -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; |