diff options
| author | Lior Amsalem <alior@marvell.com> | 2014-08-27 15:52:55 +0200 |
|---|---|---|
| committer | Vinod Koul <vinod.koul@intel.com> | 2014-09-23 16:47:01 +0200 |
| commit | 22843545b20007ae33bc3774043303e0b44e3d65 (patch) | |
| tree | 9137a6256f925f8fcce6cb7bec5aafd60208025a /drivers/dma/mv_xor.h | |
| parent | dma: mv_xor: Remove dead code (diff) | |
| download | linux-22843545b20007ae33bc3774043303e0b44e3d65.tar.xz linux-22843545b20007ae33bc3774043303e0b44e3d65.zip | |
dma: mv_xor: Add support for DMA_INTERRUPT
The driver is capable of supporting DMA_INTERRUPT by issuing a dummy 128-byte
transfer. This helps removing a poll in the async_tx stack, replacing it with
a completion interrupt.
Signed-off-by: Lior Amsalem <alior@marvell.com>
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'drivers/dma/mv_xor.h')
| -rw-r--r-- | drivers/dma/mv_xor.h | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/drivers/dma/mv_xor.h b/drivers/dma/mv_xor.h index de400365bc49..78edc7e44569 100644 --- a/drivers/dma/mv_xor.h +++ b/drivers/dma/mv_xor.h @@ -28,6 +28,9 @@ #define MV_XOR_THRESHOLD 1 #define MV_XOR_MAX_CHANNELS 2 +#define MV_XOR_MIN_BYTE_COUNT SZ_128 +#define MV_XOR_MAX_BYTE_COUNT (SZ_16M - 1) + /* Values for the XOR_CONFIG register */ #define XOR_OPERATION_MODE_XOR 0 #define XOR_OPERATION_MODE_MEMCPY 2 @@ -116,6 +119,9 @@ struct mv_xor_chan { struct list_head all_slots; int slots_allocated; struct tasklet_struct irq_tasklet; + char dummy_src[MV_XOR_MIN_BYTE_COUNT]; + char dummy_dst[MV_XOR_MIN_BYTE_COUNT]; + dma_addr_t dummy_src_addr, dummy_dst_addr; }; /** @@ -184,9 +190,4 @@ struct mv_xor_desc { #define mv_hw_desc_slot_idx(hw_desc, idx) \ ((void *)(((unsigned long)hw_desc) + ((idx) << 5))) -#define MV_XOR_MIN_BYTE_COUNT (128) -#define XOR_MAX_BYTE_COUNT ((16 * 1024 * 1024) - 1) -#define MV_XOR_MAX_BYTE_COUNT XOR_MAX_BYTE_COUNT - - #endif |