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>
diff --git a/drivers/dma/ioat/dma_v2.h b/drivers/dma/ioat/dma_v2.h
index fa030f8..e23027d 100644
--- a/drivers/dma/ioat/dma_v2.h
+++ b/drivers/dma/ioat/dma_v2.h
@@ -127,6 +127,7 @@
* @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 dma_async_tx_descriptor txd;
size_t len;
+ enum sum_check_flags *result;
#ifdef DEBUG
int id;
#endif
@@ -180,5 +182,6 @@
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 */