diff options
| author | Dan Williams <dan.j.williams@intel.com> | 2009-09-08 17:42:57 -0700 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2009-09-08 17:42:57 -0700 |
| commit | b094ad3be564e7cc59cca4ff0256550d3a55dd3b (patch) | |
| tree | d69f515b2ee6af2b0f12bb3028d7c7f5b3390794 /drivers/dma/ioat/registers.h | |
| parent | e61dacaeb3918cd00cd642e8fb0828324ac59819 (diff) | |
ioat3: xor support
ioat3.2 adds xor offload support for up to 8 sources. It can also
perform an xor-zero-sum operation to validate whether all given sources
sum to zero, without writing to a destination. Xor descriptors differ
from memcpy in that one operation may require multiple descriptors
depending on the number of sources. When the number of sources exceeds
5 an extended descriptor is needed. These descriptors need to be
accounted for when updating the DMA_COUNT register.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/dma/ioat/registers.h')
| -rw-r--r-- | drivers/dma/ioat/registers.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/dma/ioat/registers.h b/drivers/dma/ioat/registers.h index 97d26ea6d72f..63038e18ab03 100644 --- a/drivers/dma/ioat/registers.h +++ b/drivers/dma/ioat/registers.h @@ -243,6 +243,8 @@ #define IOAT_CHANERR_XOR_Q_ERR 0x20000 #define IOAT_CHANERR_DESCRIPTOR_COUNT_ERR 0x40000 +#define IOAT_CHANERR_HANDLE_MASK (IOAT_CHANERR_XOR_P_OR_CRC_ERR | IOAT_CHANERR_XOR_Q_ERR) + #define IOAT_CHANERR_MASK_OFFSET 0x2C /* 32-bit Channel Error Register */ #endif /* _IOAT_REGISTERS_H_ */ |