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authorYufen Yu <yuyufen@huawei.com>2020-08-20 16:22:08 +0300
committerSong Liu <songliubraving@fb.com>2020-09-25 02:44:44 +0300
commit29bcff787a2593b2126cfaff612c0b4e560022e9 (patch)
tree4cd0004aa759e40fb630ad650589fa29e9454f59 /include/linux/async_tx.h
parent248728dd04f5804ed1ff13bb4db9795899d25dca (diff)
downloadlinux-29bcff787a2593b2126cfaff612c0b4e560022e9.tar.xz
md/raid5: add new xor function to support different page offset
raid5 will call async_xor() and async_xor_val() to compute xor. For now, both of them require the common src/dst page offset. But, we want them to support different src/dst page offset for following shared page. Here, adding two new function async_xor_offs() and async_xor_val_offs() respectively for async_xor() and async_xor_val(). Signed-off-by: Yufen Yu <yuyufen@huawei.com> Signed-off-by: Song Liu <songliubraving@fb.com>
Diffstat (limited to 'include/linux/async_tx.h')
-rw-r--r--include/linux/async_tx.h11
1 files changed, 11 insertions, 0 deletions
diff --git a/include/linux/async_tx.h b/include/linux/async_tx.h
index 4c328fef403c..8901f3c801ee 100644
--- a/include/linux/async_tx.h
+++ b/include/linux/async_tx.h
@@ -163,11 +163,22 @@ async_xor(struct page *dest, struct page **src_list, unsigned int offset,
int src_cnt, size_t len, struct async_submit_ctl *submit);
struct dma_async_tx_descriptor *
+async_xor_offs(struct page *dest, unsigned int offset,
+ struct page **src_list, unsigned int *src_offset,
+ int src_cnt, size_t len, struct async_submit_ctl *submit);
+
+struct dma_async_tx_descriptor *
async_xor_val(struct page *dest, struct page **src_list, unsigned int offset,
int src_cnt, size_t len, enum sum_check_flags *result,
struct async_submit_ctl *submit);
struct dma_async_tx_descriptor *
+async_xor_val_offs(struct page *dest, unsigned int offset,
+ struct page **src_list, unsigned int *src_offset,
+ int src_cnt, size_t len, enum sum_check_flags *result,
+ struct async_submit_ctl *submit);
+
+struct dma_async_tx_descriptor *
async_memcpy(struct page *dest, struct page *src, unsigned int dest_offset,
unsigned int src_offset, size_t len,
struct async_submit_ctl *submit);