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authorDan Williams <dan.j.williams@intel.com>2009-09-08 17:42:57 -0700
committerDan Williams <dan.j.williams@intel.com>2009-09-08 17:42:57 -0700
commitb094ad3be564e7cc59cca4ff0256550d3a55dd3b (patch)
treed69f515b2ee6af2b0f12bb3028d7c7f5b3390794 /drivers/dma/ioat/dma_v2.h
parente61dacaeb3918cd00cd642e8fb0828324ac59819 (diff)
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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.h3
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 */