The big problem is they cannot be used to iterate over DMA mapped
scatterlists, so get rid of them in order to add DMA functionality to
mv_cesa.
Signed-off-by: Phil Sutter <phil.sutter@xxxxxxxxxxxx>
---
drivers/crypto/mv_cesa.c | 57 ++++++++++++++++++++++-----------------------
1 files changed, 28 insertions(+), 29 deletions(-)
diff --git a/drivers/crypto/mv_cesa.c b/drivers/crypto/mv_cesa.c
index 3cc9237..c305350 100644
--- a/drivers/crypto/mv_cesa.c
+++ b/drivers/crypto/mv_cesa.c
@@ -43,8 +43,8 @@ enum engine_status {
/**
* struct req_progress - used for every crypt request
- * @src_sg_it: sg iterator for src
- * @dst_sg_it: sg iterator for dst
+ * @src_sg: sg list for src
+ * @dst_sg: sg list for dst
* @sg_src_left: bytes left in src to process (scatter list)
* @src_start: offset to add to src start position (scatter list)
* @crypt_len: length of current hw crypt/hash process
@@ -59,8 +59,8 @@ enum engine_status {
* track of progress within current scatterlist.
*/
struct req_progress {
- struct sg_mapping_iter src_sg_it;
- struct sg_mapping_iter dst_sg_it;
+ struct scatterlist *src_sg;
+ struct scatterlist *dst_sg;
void (*complete) (void);
void (*process) (int is_first);
@@ -210,19 +210,19 @@ static int mv_setkey_aes(struct crypto_ablkcipher *cipher, const u8 *key,
static void copy_src_to_buf(struct req_progress *p, char *dbuf, int len)
{
- int ret;
void *sbuf;
int copy_len;
while (len) {
if (!p->sg_src_left) {
- ret = sg_miter_next(&p->src_sg_it);
- BUG_ON(!ret);
- p->sg_src_left = p->src_sg_it.length;
+ /* next sg please */
+ p->src_sg = sg_next(p->src_sg);
+ BUG_ON(!p->src_sg);
+ p->sg_src_left = p->src_sg->length;
p->src_start = 0;
}
- sbuf = p->src_sg_it.addr + p->src_start;
+ sbuf = sg_virt(p->src_sg) + p->src_start;
copy_len = min(p->sg_src_left, len);
memcpy(dbuf, sbuf, copy_len);
@@ -305,9 +305,6 @@ static void mv_crypto_algo_completion(void)
struct ablkcipher_request *req = ablkcipher_request_cast(cpg->cur_req);
struct mv_req_ctx *req_ctx = ablkcipher_request_ctx(req);
- sg_miter_stop(&cpg->p.src_sg_it);
- sg_miter_stop(&cpg->p.dst_sg_it);
-
if (req_ctx->op != COP_AES_CBC)
return ;
@@ -437,7 +434,6 @@ static void mv_hash_algo_completion(void)
if (ctx->extra_bytes)
copy_src_to_buf(&cpg->p, ctx->buffer, ctx->extra_bytes);
- sg_miter_stop(&cpg->p.src_sg_it);
if (likely(ctx->last_chunk)) {
if (likely(ctx->count <= MAX_HW_HASH_SIZE)) {
@@ -457,7 +453,6 @@ static void dequeue_complete_req(void)
{
struct crypto_async_request *req = cpg->cur_req;
void *buf;
- int ret;
cpg->p.hw_processed_bytes += cpg->p.crypt_len;
if (cpg->p.copy_back) {
int need_copy_len = cpg->p.crypt_len;
@@ -466,14 +461,14 @@ static void dequeue_complete_req(void)
int dst_copy;
if (!cpg->p.sg_dst_left) {
- ret = sg_miter_next(&cpg->p.dst_sg_it);
- BUG_ON(!ret);
- cpg->p.sg_dst_left = cpg->p.dst_sg_it.length;
+ /* next sg please */
+ cpg->p.dst_sg = sg_next(cpg->p.dst_sg);
+ BUG_ON(!cpg->p.dst_sg);
+ cpg->p.sg_dst_left = cpg->p.dst_sg->length;
cpg->p.dst_start = 0;
}
- buf = cpg->p.dst_sg_it.addr;
- buf += cpg->p.dst_start;
+ buf = sg_virt(cpg->p.dst_sg) + cpg->p.dst_start;
dst_copy = min(need_copy_len, cpg->p.sg_dst_left);
@@ -523,7 +518,6 @@ static int count_sgs(struct scatterlist *sl, unsigned int total_bytes)
static void mv_start_new_crypt_req(struct ablkcipher_request *req)
{
struct req_progress *p = &cpg->p;
- int num_sgs;
cpg->cur_req = &req->base;
memset(p, 0, sizeof(struct req_progress));
@@ -532,11 +526,14 @@ static void mv_start_new_crypt_req(struct ablkcipher_request *req)
p->process = mv_process_current_q;
p->copy_back = 1;
- num_sgs = count_sgs(req->src, req->nbytes);
- sg_miter_start(&p->src_sg_it, req->src, num_sgs, SG_MITER_FROM_SG);
-
- num_sgs = count_sgs(req->dst, req->nbytes);
- sg_miter_start(&p->dst_sg_it, req->dst, num_sgs, SG_MITER_TO_SG);
+ p->src_sg = req->src;
+ p->dst_sg = req->dst;
+ if (req->nbytes) {
+ BUG_ON(!req->src);
+ BUG_ON(!req->dst);
+ p->sg_src_left = req->src->length;
+ p->sg_dst_left = req->dst->length;
+ }
mv_process_current_q(1);
}
@@ -545,7 +542,7 @@ static void mv_start_new_hash_req(struct ahash_request *req)
{
struct req_progress *p = &cpg->p;
struct mv_req_hash_ctx *ctx = ahash_request_ctx(req);
- int num_sgs, hw_bytes, old_extra_bytes, rc;
+ int hw_bytes, old_extra_bytes, rc;
cpg->cur_req = &req->base;
memset(p, 0, sizeof(struct req_progress));
hw_bytes = req->nbytes + ctx->extra_bytes;
@@ -558,8 +555,11 @@ static void mv_start_new_hash_req(struct ahash_request *req)
else
ctx->extra_bytes = 0;
- num_sgs = count_sgs(req->src, req->nbytes);
- sg_miter_start(&p->src_sg_it, req->src, num_sgs, SG_MITER_FROM_SG);
+ p->src_sg = req->src;
+ if (req->nbytes) {
+ BUG_ON(!req->src);
+ p->sg_src_left = req->src->length;
+ }
if (hw_bytes) {
p->hw_nbytes = hw_bytes;
@@ -576,7 +576,6 @@ static void mv_start_new_hash_req(struct ahash_request *req)
} else {
copy_src_to_buf(p, ctx->buffer + old_extra_bytes,
ctx->extra_bytes - old_extra_bytes);
- sg_miter_stop(&p->src_sg_it);
if (ctx->last_chunk)
rc = mv_hash_final_fallback(req);
else
--
1.7.3.4
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