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| 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/dma_v2.h | |
| parent | e61dacaeb3918cd00cd642e8fb0828324ac59819 (diff) | |
| download | blackbird-obmc-linux-b094ad3be564e7cc59cca4ff0256550d3a55dd3b.tar.gz blackbird-obmc-linux-b094ad3be564e7cc59cca4ff0256550d3a55dd3b.zip | |
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/dma_v2.h')
| -rw-r--r-- | drivers/dma/ioat/dma_v2.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/dma/ioat/dma_v2.h b/drivers/dma/ioat/dma_v2.h index fa030f8e1f27..e23027d3dcbd 100644 --- a/drivers/dma/ioat/dma_v2.h +++ b/drivers/dma/ioat/dma_v2.h @@ -127,6 +127,7 @@ static inline u16 ioat2_xferlen_to_descs(struct ioat2_dma_chan *ioat, size_t len * @raw: hardware raw (un-typed) descriptor * @txd: the generic software descriptor for all engines * @len: total transaction length for unmap + * @result: asynchronous result of validate operations * @id: identifier for debug */ @@ -143,6 +144,7 @@ struct ioat_ring_ent { }; struct dma_async_tx_descriptor txd; size_t len; + enum sum_check_flags *result; #ifdef DEBUG int id; #endif @@ -180,5 +182,6 @@ enum dma_status ioat2_is_complete(struct dma_chan *c, dma_cookie_t cookie, dma_cookie_t *done, dma_cookie_t *used); void __ioat2_restart_chan(struct ioat2_dma_chan *ioat); bool reshape_ring(struct ioat2_dma_chan *ioat, int order); +void __ioat2_issue_pending(struct ioat2_dma_chan *ioat); extern struct kobj_type ioat2_ktype; #endif /* IOATDMA_V2_H */ |
