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authorRuchika Gupta <ruchika.gupta@freescale.com>2014-06-23 19:50:26 +0530
committerHerbert Xu <herbert@gondor.apana.org.au>2014-06-25 21:38:41 +0800
commit1da2be33ad4c30a2b1d5fe3053b5b7f63e6e2baa (patch)
treeae35138a3ce41c356e893589cce3720a6ee0bc5c /drivers
parentef94b1d834aace7101de77c3a7c2631b9ae9c5f6 (diff)
crypto: caam - Correct the dma mapping for sg table
At few places in caamhash and caamalg, after allocating a dmable buffer for sg table , the buffer was being modified. As per definition of DMA_FROM_DEVICE ,afer allocation the memory should be treated as read-only by the driver. This patch shifts the allocation of dmable buffer for sg table after it is populated by the driver, making it read-only as per the DMA API's requirement. Signed-off-by: Ruchika Gupta <ruchika.gupta@freescale.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/crypto/caam/caamalg.c8
-rw-r--r--drivers/crypto/caam/caamhash.c40
2 files changed, 27 insertions, 21 deletions
diff --git a/drivers/crypto/caam/caamalg.c b/drivers/crypto/caam/caamalg.c
index c09ce1f040d..87d9de48a39 100644
--- a/drivers/crypto/caam/caamalg.c
+++ b/drivers/crypto/caam/caamalg.c
@@ -1345,8 +1345,6 @@ static struct aead_edesc *aead_edesc_alloc(struct aead_request *req,
edesc->sec4_sg_bytes = sec4_sg_bytes;
edesc->sec4_sg = (void *)edesc + sizeof(struct aead_edesc) +
desc_bytes;
- edesc->sec4_sg_dma = dma_map_single(jrdev, edesc->sec4_sg,
- sec4_sg_bytes, DMA_TO_DEVICE);
*all_contig_ptr = all_contig;
sec4_sg_index = 0;
@@ -1369,6 +1367,8 @@ static struct aead_edesc *aead_edesc_alloc(struct aead_request *req,
sg_to_sec4_sg_last(req->dst, dst_nents,
edesc->sec4_sg + sec4_sg_index, 0);
}
+ edesc->sec4_sg_dma = dma_map_single(jrdev, edesc->sec4_sg,
+ sec4_sg_bytes, DMA_TO_DEVICE);
return edesc;
}
@@ -1534,8 +1534,6 @@ static struct aead_edesc *aead_giv_edesc_alloc(struct aead_givcrypt_request
edesc->sec4_sg_bytes = sec4_sg_bytes;
edesc->sec4_sg = (void *)edesc + sizeof(struct aead_edesc) +
desc_bytes;
- edesc->sec4_sg_dma = dma_map_single(jrdev, edesc->sec4_sg,
- sec4_sg_bytes, DMA_TO_DEVICE);
*contig_ptr = contig;
sec4_sg_index = 0;
@@ -1559,6 +1557,8 @@ static struct aead_edesc *aead_giv_edesc_alloc(struct aead_givcrypt_request
sg_to_sec4_sg_last(req->dst, dst_nents,
edesc->sec4_sg + sec4_sg_index, 0);
}
+ edesc->sec4_sg_dma = dma_map_single(jrdev, edesc->sec4_sg,
+ sec4_sg_bytes, DMA_TO_DEVICE);
return edesc;
}
diff --git a/drivers/crypto/caam/caamhash.c b/drivers/crypto/caam/caamhash.c
index 0d9284ef96a..2ab057b0a6d 100644
--- a/drivers/crypto/caam/caamhash.c
+++ b/drivers/crypto/caam/caamhash.c
@@ -808,9 +808,6 @@ static int ahash_update_ctx(struct ahash_request *req)
edesc->sec4_sg_bytes = sec4_sg_bytes;
edesc->sec4_sg = (void *)edesc + sizeof(struct ahash_edesc) +
DESC_JOB_IO_LEN;
- edesc->sec4_sg_dma = dma_map_single(jrdev, edesc->sec4_sg,
- sec4_sg_bytes,
- DMA_TO_DEVICE);
ctx_map_to_sec4_sg(desc, jrdev, state, ctx->ctx_len,
edesc->sec4_sg, DMA_BIDIRECTIONAL);
@@ -839,6 +836,10 @@ static int ahash_update_ctx(struct ahash_request *req)
init_job_desc_shared(desc, ptr, sh_len, HDR_SHARE_DEFER |
HDR_REVERSE);
+ edesc->sec4_sg_dma = dma_map_single(jrdev, edesc->sec4_sg,
+ sec4_sg_bytes,
+ DMA_TO_DEVICE);
+
append_seq_in_ptr(desc, edesc->sec4_sg_dma, ctx->ctx_len +
to_hash, LDST_SGF);
@@ -911,8 +912,6 @@ static int ahash_final_ctx(struct ahash_request *req)
edesc->sec4_sg_bytes = sec4_sg_bytes;
edesc->sec4_sg = (void *)edesc + sizeof(struct ahash_edesc) +
DESC_JOB_IO_LEN;
- edesc->sec4_sg_dma = dma_map_single(jrdev, edesc->sec4_sg,
- sec4_sg_bytes, DMA_TO_DEVICE);
edesc->src_nents = 0;
ctx_map_to_sec4_sg(desc, jrdev, state, ctx->ctx_len, edesc->sec4_sg,
@@ -923,6 +922,9 @@ static int ahash_final_ctx(struct ahash_request *req)
last_buflen);
(edesc->sec4_sg + sec4_sg_bytes - 1)->len |= SEC4_SG_LEN_FIN;
+ edesc->sec4_sg_dma = dma_map_single(jrdev, edesc->sec4_sg,
+ sec4_sg_bytes, DMA_TO_DEVICE);
+
append_seq_in_ptr(desc, edesc->sec4_sg_dma, ctx->ctx_len + buflen,
LDST_SGF);
@@ -989,8 +991,6 @@ static int ahash_finup_ctx(struct ahash_request *req)
edesc->sec4_sg_bytes = sec4_sg_bytes;
edesc->sec4_sg = (void *)edesc + sizeof(struct ahash_edesc) +
DESC_JOB_IO_LEN;
- edesc->sec4_sg_dma = dma_map_single(jrdev, edesc->sec4_sg,
- sec4_sg_bytes, DMA_TO_DEVICE);
ctx_map_to_sec4_sg(desc, jrdev, state, ctx->ctx_len, edesc->sec4_sg,
DMA_TO_DEVICE);
@@ -1002,6 +1002,9 @@ static int ahash_finup_ctx(struct ahash_request *req)
src_map_to_sec4_sg(jrdev, req->src, src_nents, edesc->sec4_sg +
sec4_sg_src_index, chained);
+ edesc->sec4_sg_dma = dma_map_single(jrdev, edesc->sec4_sg,
+ sec4_sg_bytes, DMA_TO_DEVICE);
+
append_seq_in_ptr(desc, edesc->sec4_sg_dma, ctx->ctx_len +
buflen + req->nbytes, LDST_SGF);
@@ -1056,8 +1059,6 @@ static int ahash_digest(struct ahash_request *req)
}
edesc->sec4_sg = (void *)edesc + sizeof(struct ahash_edesc) +
DESC_JOB_IO_LEN;
- edesc->sec4_sg_dma = dma_map_single(jrdev, edesc->sec4_sg,
- sec4_sg_bytes, DMA_TO_DEVICE);
edesc->src_nents = src_nents;
edesc->chained = chained;
@@ -1067,6 +1068,8 @@ static int ahash_digest(struct ahash_request *req)
if (src_nents) {
sg_to_sec4_sg_last(req->src, src_nents, edesc->sec4_sg, 0);
+ edesc->sec4_sg_dma = dma_map_single(jrdev, edesc->sec4_sg,
+ sec4_sg_bytes, DMA_TO_DEVICE);
src_dma = edesc->sec4_sg_dma;
options = LDST_SGF;
} else {
@@ -1197,9 +1200,6 @@ static int ahash_update_no_ctx(struct ahash_request *req)
edesc->sec4_sg_bytes = sec4_sg_bytes;
edesc->sec4_sg = (void *)edesc + sizeof(struct ahash_edesc) +
DESC_JOB_IO_LEN;
- edesc->sec4_sg_dma = dma_map_single(jrdev, edesc->sec4_sg,
- sec4_sg_bytes,
- DMA_TO_DEVICE);
state->buf_dma = buf_map_to_sec4_sg(jrdev, edesc->sec4_sg,
buf, *buflen);
@@ -1216,6 +1216,10 @@ static int ahash_update_no_ctx(struct ahash_request *req)
init_job_desc_shared(desc, ptr, sh_len, HDR_SHARE_DEFER |
HDR_REVERSE);
+ edesc->sec4_sg_dma = dma_map_single(jrdev, edesc->sec4_sg,
+ sec4_sg_bytes,
+ DMA_TO_DEVICE);
+
append_seq_in_ptr(desc, edesc->sec4_sg_dma, to_hash, LDST_SGF);
map_seq_out_ptr_ctx(desc, jrdev, state, ctx->ctx_len);
@@ -1297,8 +1301,6 @@ static int ahash_finup_no_ctx(struct ahash_request *req)
edesc->sec4_sg_bytes = sec4_sg_bytes;
edesc->sec4_sg = (void *)edesc + sizeof(struct ahash_edesc) +
DESC_JOB_IO_LEN;
- edesc->sec4_sg_dma = dma_map_single(jrdev, edesc->sec4_sg,
- sec4_sg_bytes, DMA_TO_DEVICE);
state->buf_dma = try_buf_map_to_sec4_sg(jrdev, edesc->sec4_sg, buf,
state->buf_dma, buflen,
@@ -1307,6 +1309,9 @@ static int ahash_finup_no_ctx(struct ahash_request *req)
src_map_to_sec4_sg(jrdev, req->src, src_nents, edesc->sec4_sg + 1,
chained);
+ edesc->sec4_sg_dma = dma_map_single(jrdev, edesc->sec4_sg,
+ sec4_sg_bytes, DMA_TO_DEVICE);
+
append_seq_in_ptr(desc, edesc->sec4_sg_dma, buflen +
req->nbytes, LDST_SGF);
@@ -1380,13 +1385,14 @@ static int ahash_update_first(struct ahash_request *req)
edesc->sec4_sg_bytes = sec4_sg_bytes;
edesc->sec4_sg = (void *)edesc + sizeof(struct ahash_edesc) +
DESC_JOB_IO_LEN;
- edesc->sec4_sg_dma = dma_map_single(jrdev, edesc->sec4_sg,
- sec4_sg_bytes,
- DMA_TO_DEVICE);
if (src_nents) {
sg_to_sec4_sg_last(req->src, src_nents,
edesc->sec4_sg, 0);
+ edesc->sec4_sg_dma = dma_map_single(jrdev,
+ edesc->sec4_sg,
+ sec4_sg_bytes,
+ DMA_TO_DEVICE);
src_dma = edesc->sec4_sg_dma;
options = LDST_SGF;
} else {