From b094ad3be564e7cc59cca4ff0256550d3a55dd3b Mon Sep 17 00:00:00 2001 From: Dan Williams Date: Tue, 8 Sep 2009 17:42:57 -0700 Subject: 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 --- drivers/dma/ioat/registers.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'drivers/dma/ioat/registers.h') 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_ */ -- cgit