crypto: caam - dma_map_sg can handle chained SG
The caam driver use two dma_map_sg path according to SG are chained
or not.
Since dma_map_sg can handle both case, clean the code with all
references to sg chained.
Thus removing dma_map_sg_chained, dma_unmap_sg_chained
and __sg_count functions.
Signed-off-by: LABBE Corentin <clabbe.montjoie@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
diff --git a/drivers/crypto/caam/sg_sw_sec4.h b/drivers/crypto/caam/sg_sw_sec4.h
index 18cd6d1..12ec661 100644
--- a/drivers/crypto/caam/sg_sw_sec4.h
+++ b/drivers/crypto/caam/sg_sw_sec4.h
@@ -69,81 +69,13 @@
return sec4_sg_ptr - 1;
}
-/* count number of elements in scatterlist */
-static inline int __sg_count(struct scatterlist *sg_list, int nbytes,
- bool *chained)
-{
- struct scatterlist *sg = sg_list;
- int sg_nents = 0;
-
- while (nbytes > 0) {
- sg_nents++;
- nbytes -= sg->length;
- if (!sg_is_last(sg) && (sg + 1)->length == 0)
- *chained = true;
- sg = sg_next(sg);
- }
-
- return sg_nents;
-}
-
/* derive number of elements in scatterlist, but return 0 for 1 */
-static inline int sg_count(struct scatterlist *sg_list, int nbytes,
- bool *chained)
+static inline int sg_count(struct scatterlist *sg_list, int nbytes)
{
- int sg_nents = __sg_count(sg_list, nbytes, chained);
+ int sg_nents = sg_nents_for_len(sg_list, nbytes);
if (likely(sg_nents == 1))
return 0;
return sg_nents;
}
-
-static inline void dma_unmap_sg_chained(
- struct device *dev, struct scatterlist *sg, unsigned int nents,
- enum dma_data_direction dir, bool chained)
-{
- if (unlikely(chained)) {
- int i;
- struct scatterlist *tsg = sg;
-
- /*
- * Use a local copy of the sg pointer to avoid moving the
- * head of the list pointed to by sg as we walk the list.
- */
- for (i = 0; i < nents; i++) {
- dma_unmap_sg(dev, tsg, 1, dir);
- tsg = sg_next(tsg);
- }
- } else if (nents) {
- dma_unmap_sg(dev, sg, nents, dir);
- }
-}
-
-static inline int dma_map_sg_chained(
- struct device *dev, struct scatterlist *sg, unsigned int nents,
- enum dma_data_direction dir, bool chained)
-{
- if (unlikely(chained)) {
- int i;
- struct scatterlist *tsg = sg;
-
- /*
- * Use a local copy of the sg pointer to avoid moving the
- * head of the list pointed to by sg as we walk the list.
- */
- for (i = 0; i < nents; i++) {
- if (!dma_map_sg(dev, tsg, 1, dir)) {
- dma_unmap_sg_chained(dev, sg, i, dir,
- chained);
- nents = 0;
- break;
- }
-
- tsg = sg_next(tsg);
- }
- } else
- nents = dma_map_sg(dev, sg, nents, dir);
-
- return nents;
-}