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crypto: caam - use len instead of nents for bulding HW S/G table

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Currently, conversion of SW S/G table into HW S/G layout relies on
nents returned by sg_nents_for_len(sg, len).
However this leaves the possibility of HW S/G referencing more data
then needed: since buffer length in HW S/G entries is filled using
sg_dma_len(sg), the last entry in HW S/G table might have a length
that is bigger than needed for the crypto request.

This way of S/G table conversion is fine, unless after converting a table
more entries have to be appended to the HW S/G table.
In this case, crypto engine would access data from the S/G entry having
the incorrect length, instead of advancing in the S/G table.
This situation doesn't exist, but the upcoming implementation of
IV update for skcipher algorithms needs to add a S/G entry after
req->dst S/G (corresponding to output IV).

Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Horia Geantă 2019-06-10 16:30:58 +03:00 committed by Herbert Xu
parent 1fa6d053b2
commit 059d73eea6
8 changed files with 105 additions and 99 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

35
drivers/crypto/caam/caamalg.c
View File

@ -1284,37 +1284,36 @@ static struct aead_edesc *aead_edesc_alloc(struct aead_request *req,
gfp_t flags = (req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP) ?
GFP_KERNEL : GFP_ATOMIC;
int src_nents, mapped_src_nents, dst_nents = 0, mapped_dst_nents = 0;
int src_len, dst_len = 0;
struct aead_edesc *edesc;
int sec4_sg_index, sec4_sg_len, sec4_sg_bytes;
unsigned int authsize = ctx->authsize;
if (unlikely(req->dst != req->src)) {
src_nents = sg_nents_for_len(req->src, req->assoclen +
req->cryptlen);
src_len = req->assoclen + req->cryptlen;
dst_len = src_len + (encrypt ? authsize : (-authsize));
src_nents = sg_nents_for_len(req->src, src_len);
if (unlikely(src_nents < 0)) {
dev_err(jrdev, "Insufficient bytes (%d) in src S/G\n",
req->assoclen + req->cryptlen);
src_len);
return ERR_PTR(src_nents);
}
dst_nents = sg_nents_for_len(req->dst, req->assoclen +
req->cryptlen +
(encrypt ? authsize :
(-authsize)));
dst_nents = sg_nents_for_len(req->dst, dst_len);
if (unlikely(dst_nents < 0)) {
dev_err(jrdev, "Insufficient bytes (%d) in dst S/G\n",
req->assoclen + req->cryptlen +
(encrypt ? authsize : (-authsize)));
dst_len);
return ERR_PTR(dst_nents);
}
} else {
src_nents = sg_nents_for_len(req->src, req->assoclen +
req->cryptlen +
(encrypt ? authsize : 0));
src_len = req->assoclen + req->cryptlen +
(encrypt ? authsize : 0);
src_nents = sg_nents_for_len(req->src, src_len);
if (unlikely(src_nents < 0)) {
dev_err(jrdev, "Insufficient bytes (%d) in src S/G\n",
req->assoclen + req->cryptlen +
(encrypt ? authsize : 0));
src_len);
return ERR_PTR(src_nents);
}
}
@ -1386,12 +1385,12 @@ static struct aead_edesc *aead_edesc_alloc(struct aead_request *req,
sec4_sg_index = 0;
if (mapped_src_nents > 1) {
sg_to_sec4_sg_last(req->src, mapped_src_nents,
sg_to_sec4_sg_last(req->src, src_len,
edesc->sec4_sg + sec4_sg_index, 0);
sec4_sg_index += mapped_src_nents;
}
if (mapped_dst_nents > 1) {
sg_to_sec4_sg_last(req->dst, mapped_dst_nents,
sg_to_sec4_sg_last(req->dst, dst_len,
edesc->sec4_sg + sec4_sg_index, 0);
}
@ -1756,11 +1755,11 @@ static struct skcipher_edesc *skcipher_edesc_alloc(struct skcipher_request *req,
dma_to_sec4_sg_one(edesc->sec4_sg, iv_dma, ivsize, 0);
}
if (dst_sg_idx)
sg_to_sec4_sg_last(req->src, mapped_src_nents, edesc->sec4_sg +
sg_to_sec4_sg_last(req->src, req->cryptlen, edesc->sec4_sg +
!!ivsize, 0);
if (mapped_dst_nents > 1) {
sg_to_sec4_sg_last(req->dst, mapped_dst_nents,
sg_to_sec4_sg_last(req->dst, req->cryptlen,
edesc->sec4_sg + dst_sg_idx, 0);
}

36
drivers/crypto/caam/caamalg_qi.c
View File

@ -917,6 +917,7 @@ static struct aead_edesc *aead_edesc_alloc(struct aead_request *req,
gfp_t flags = (req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP) ?
GFP_KERNEL : GFP_ATOMIC;
int src_nents, mapped_src_nents, dst_nents = 0, mapped_dst_nents = 0;
int src_len, dst_len = 0;
struct aead_edesc *edesc;
dma_addr_t qm_sg_dma, iv_dma = 0;
int ivsize = 0;
@ -938,13 +939,13 @@ static struct aead_edesc *aead_edesc_alloc(struct aead_request *req,
}
if (likely(req->src == req->dst)) {
src_nents = sg_nents_for_len(req->src, req->assoclen +
req->cryptlen +
(encrypt ? authsize : 0));
src_len = req->assoclen + req->cryptlen +
(encrypt ? authsize : 0);
src_nents = sg_nents_for_len(req->src, src_len);
if (unlikely(src_nents < 0)) {
dev_err(qidev, "Insufficient bytes (%d) in src S/G\n",
req->assoclen + req->cryptlen +
(encrypt ? authsize : 0));
src_len);
qi_cache_free(edesc);
return ERR_PTR(src_nents);
}
@ -957,23 +958,21 @@ static struct aead_edesc *aead_edesc_alloc(struct aead_request *req,
return ERR_PTR(-ENOMEM);
}
} else {
src_nents = sg_nents_for_len(req->src, req->assoclen +
req->cryptlen);
src_len = req->assoclen + req->cryptlen;
dst_len = src_len + (encrypt ? authsize : (-authsize));
src_nents = sg_nents_for_len(req->src, src_len);
if (unlikely(src_nents < 0)) {
dev_err(qidev, "Insufficient bytes (%d) in src S/G\n",
req->assoclen + req->cryptlen);
src_len);
qi_cache_free(edesc);
return ERR_PTR(src_nents);
}
dst_nents = sg_nents_for_len(req->dst, req->assoclen +
req->cryptlen +
(encrypt ? authsize :
(-authsize)));
dst_nents = sg_nents_for_len(req->dst, dst_len);
if (unlikely(dst_nents < 0)) {
dev_err(qidev, "Insufficient bytes (%d) in dst S/G\n",
req->assoclen + req->cryptlen +
(encrypt ? authsize : (-authsize)));
dst_len);
qi_cache_free(edesc);
return ERR_PTR(dst_nents);
}
@ -1082,12 +1081,11 @@ static struct aead_edesc *aead_edesc_alloc(struct aead_request *req,
dma_to_qm_sg_one(sg_table + qm_sg_index, iv_dma, ivsize, 0);
qm_sg_index++;
}
sg_to_qm_sg_last(req->src, mapped_src_nents, sg_table + qm_sg_index, 0);
sg_to_qm_sg_last(req->src, src_len, sg_table + qm_sg_index, 0);
qm_sg_index += mapped_src_nents;
if (mapped_dst_nents > 1)
sg_to_qm_sg_last(req->dst, mapped_dst_nents, sg_table +
qm_sg_index, 0);
sg_to_qm_sg_last(req->dst, dst_len, sg_table + qm_sg_index, 0);
qm_sg_dma = dma_map_single(qidev, sg_table, qm_sg_bytes, DMA_TO_DEVICE);
if (dma_mapping_error(qidev, qm_sg_dma)) {
@ -1340,10 +1338,10 @@ static struct skcipher_edesc *skcipher_edesc_alloc(struct skcipher_request *req,
edesc->drv_req.drv_ctx = drv_ctx;
dma_to_qm_sg_one(sg_table, iv_dma, ivsize, 0);
sg_to_qm_sg_last(req->src, mapped_src_nents, sg_table + 1, 0);
sg_to_qm_sg_last(req->src, req->cryptlen, sg_table + 1, 0);
if (mapped_dst_nents > 1)
sg_to_qm_sg_last(req->dst, mapped_dst_nents, sg_table +
sg_to_qm_sg_last(req->dst, req->cryptlen, sg_table +
dst_sg_idx, 0);
edesc->qm_sg_dma = dma_map_single(qidev, sg_table, edesc->qm_sg_bytes,

60
drivers/crypto/caam/caamalg_qi2.c
View File

@ -371,6 +371,7 @@ static struct aead_edesc *aead_edesc_alloc(struct aead_request *req,
gfp_t flags = (req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP) ?
GFP_KERNEL : GFP_ATOMIC;
int src_nents, mapped_src_nents, dst_nents = 0, mapped_dst_nents = 0;
int src_len, dst_len = 0;
struct aead_edesc *edesc;
dma_addr_t qm_sg_dma, iv_dma = 0;
int ivsize = 0;
@ -387,23 +388,21 @@ static struct aead_edesc *aead_edesc_alloc(struct aead_request *req,
}
if (unlikely(req->dst != req->src)) {
src_nents = sg_nents_for_len(req->src, req->assoclen +
req->cryptlen);
src_len = req->assoclen + req->cryptlen;
dst_len = src_len + (encrypt ? authsize : (-authsize));
src_nents = sg_nents_for_len(req->src, src_len);
if (unlikely(src_nents < 0)) {
dev_err(dev, "Insufficient bytes (%d) in src S/G\n",
req->assoclen + req->cryptlen);
src_len);
qi_cache_free(edesc);
return ERR_PTR(src_nents);
}
dst_nents = sg_nents_for_len(req->dst, req->assoclen +
req->cryptlen +
(encrypt ? authsize :
(-authsize)));
dst_nents = sg_nents_for_len(req->dst, dst_len);
if (unlikely(dst_nents < 0)) {
dev_err(dev, "Insufficient bytes (%d) in dst S/G\n",
req->assoclen + req->cryptlen +
(encrypt ? authsize : (-authsize)));
dst_len);
qi_cache_free(edesc);
return ERR_PTR(dst_nents);
}
@ -434,13 +433,13 @@ static struct aead_edesc *aead_edesc_alloc(struct aead_request *req,
mapped_dst_nents = 0;
}
} else {
src_nents = sg_nents_for_len(req->src, req->assoclen +
req->cryptlen +
(encrypt ? authsize : 0));
src_len = req->assoclen + req->cryptlen +
(encrypt ? authsize : 0);
src_nents = sg_nents_for_len(req->src, src_len);
if (unlikely(src_nents < 0)) {
dev_err(dev, "Insufficient bytes (%d) in src S/G\n",
req->assoclen + req->cryptlen +
(encrypt ? authsize : 0));
src_len);
qi_cache_free(edesc);
return ERR_PTR(src_nents);
}
@ -536,12 +535,11 @@ static struct aead_edesc *aead_edesc_alloc(struct aead_request *req,
dma_to_qm_sg_one(sg_table + qm_sg_index, iv_dma, ivsize, 0);
qm_sg_index++;
}
sg_to_qm_sg_last(req->src, mapped_src_nents, sg_table + qm_sg_index, 0);
sg_to_qm_sg_last(req->src, src_len, sg_table + qm_sg_index, 0);
qm_sg_index += mapped_src_nents;
if (mapped_dst_nents > 1)
sg_to_qm_sg_last(req->dst, mapped_dst_nents, sg_table +
qm_sg_index, 0);
sg_to_qm_sg_last(req->dst, dst_len, sg_table + qm_sg_index, 0);
qm_sg_dma = dma_map_single(dev, sg_table, qm_sg_bytes, DMA_TO_DEVICE);
if (dma_mapping_error(dev, qm_sg_dma)) {
@ -1159,10 +1157,10 @@ static struct skcipher_edesc *skcipher_edesc_alloc(struct skcipher_request *req)
edesc->qm_sg_bytes = qm_sg_bytes;
dma_to_qm_sg_one(sg_table, iv_dma, ivsize, 0);
sg_to_qm_sg_last(req->src, mapped_src_nents, sg_table + 1, 0);
sg_to_qm_sg_last(req->src, req->cryptlen, sg_table + 1, 0);
if (mapped_dst_nents > 1)
sg_to_qm_sg_last(req->dst, mapped_dst_nents, sg_table +
sg_to_qm_sg_last(req->dst, req->cryptlen, sg_table +
dst_sg_idx, 0);
edesc->qm_sg_dma = dma_map_single(dev, sg_table, edesc->qm_sg_bytes,
@ -3422,9 +3420,9 @@ static int ahash_update_ctx(struct ahash_request *req)
if (to_hash) {
struct dpaa2_sg_entry *sg_table;
int src_len = req->nbytes - *next_buflen;
src_nents = sg_nents_for_len(req->src,
req->nbytes - (*next_buflen));
src_nents = sg_nents_for_len(req->src, src_len);
if (src_nents < 0) {
dev_err(ctx->dev, "Invalid number of src SG.\n");
return src_nents;
@ -3465,7 +3463,7 @@ static int ahash_update_ctx(struct ahash_request *req)
goto unmap_ctx;
if (mapped_nents) {
sg_to_qm_sg_last(req->src, mapped_nents,
sg_to_qm_sg_last(req->src, src_len,
sg_table + qm_sg_src_index, 0);
if (*next_buflen)
scatterwalk_map_and_copy(next_buf, req->src,
@ -3653,7 +3651,7 @@ static int ahash_finup_ctx(struct ahash_request *req)
if (ret)
goto unmap_ctx;
sg_to_qm_sg_last(req->src, mapped_nents, sg_table + qm_sg_src_index, 0);
sg_to_qm_sg_last(req->src, req->nbytes, sg_table + qm_sg_src_index, 0);
edesc->qm_sg_dma = dma_map_single(ctx->dev, sg_table, qm_sg_bytes,
DMA_TO_DEVICE);
@ -3739,7 +3737,7 @@ static int ahash_digest(struct ahash_request *req)
struct dpaa2_sg_entry *sg_table = &edesc->sgt[0];
qm_sg_bytes = pad_sg_nents(mapped_nents) * sizeof(*sg_table);
sg_to_qm_sg_last(req->src, mapped_nents, sg_table, 0);
sg_to_qm_sg_last(req->src, req->nbytes, sg_table, 0);
edesc->qm_sg_dma = dma_map_single(ctx->dev, sg_table,
qm_sg_bytes, DMA_TO_DEVICE);
if (dma_mapping_error(ctx->dev, edesc->qm_sg_dma)) {
@ -3882,9 +3880,9 @@ static int ahash_update_no_ctx(struct ahash_request *req)
if (to_hash) {
struct dpaa2_sg_entry *sg_table;
int src_len = req->nbytes - *next_buflen;
src_nents = sg_nents_for_len(req->src,
req->nbytes - *next_buflen);
src_nents = sg_nents_for_len(req->src, src_len);
if (src_nents < 0) {
dev_err(ctx->dev, "Invalid number of src SG.\n");
return src_nents;
@ -3918,7 +3916,7 @@ static int ahash_update_no_ctx(struct ahash_request *req)
if (ret)
goto unmap_ctx;
sg_to_qm_sg_last(req->src, mapped_nents, sg_table + 1, 0);
sg_to_qm_sg_last(req->src, src_len, sg_table + 1, 0);
if (*next_buflen)
scatterwalk_map_and_copy(next_buf, req->src,
@ -4037,7 +4035,7 @@ static int ahash_finup_no_ctx(struct ahash_request *req)
if (ret)
goto unmap;
sg_to_qm_sg_last(req->src, mapped_nents, sg_table + 1, 0);
sg_to_qm_sg_last(req->src, req->nbytes, sg_table + 1, 0);
edesc->qm_sg_dma = dma_map_single(ctx->dev, sg_table, qm_sg_bytes,
DMA_TO_DEVICE);
@ -4107,9 +4105,9 @@ static int ahash_update_first(struct ahash_request *req)
if (to_hash) {
struct dpaa2_sg_entry *sg_table;
int src_len = req->nbytes - *next_buflen;
src_nents = sg_nents_for_len(req->src,
req->nbytes - (*next_buflen));
src_nents = sg_nents_for_len(req->src, src_len);
if (src_nents < 0) {
dev_err(ctx->dev, "Invalid number of src SG.\n");
return src_nents;
@ -4144,7 +4142,7 @@ static int ahash_update_first(struct ahash_request *req)
if (mapped_nents > 1) {
int qm_sg_bytes;
sg_to_qm_sg_last(req->src, mapped_nents, sg_table, 0);
sg_to_qm_sg_last(req->src, src_len, sg_table, 0);
qm_sg_bytes = pad_sg_nents(mapped_nents) *
sizeof(*sg_table);
edesc->qm_sg_dma = dma_map_single(ctx->dev, sg_table,

15
drivers/crypto/caam/caamhash.c
View File

@ -729,7 +729,7 @@ static int ahash_edesc_add_src(struct caam_hash_ctx *ctx,
unsigned int sgsize = sizeof(*sg) *
pad_sg_nents(first_sg + nents);
sg_to_sec4_sg_last(req->src, nents, sg + first_sg, 0);
sg_to_sec4_sg_last(req->src, to_hash, sg + first_sg, 0);
src_dma = dma_map_single(ctx->jrdev, sg, sgsize, DMA_TO_DEVICE);
if (dma_mapping_error(ctx->jrdev, src_dma)) {
@ -788,9 +788,9 @@ static int ahash_update_ctx(struct ahash_request *req)
if (to_hash) {
int pad_nents;
int src_len = req->nbytes - *next_buflen;
src_nents = sg_nents_for_len(req->src,
req->nbytes - (*next_buflen));
src_nents = sg_nents_for_len(req->src, src_len);
if (src_nents < 0) {
dev_err(jrdev, "Invalid number of src SG.\n");
return src_nents;
@ -835,7 +835,7 @@ static int ahash_update_ctx(struct ahash_request *req)
goto unmap_ctx;
if (mapped_nents)
sg_to_sec4_sg_last(req->src, mapped_nents,
sg_to_sec4_sg_last(req->src, src_len,
edesc->sec4_sg + sec4_sg_src_index,
0);
else
@ -1208,9 +1208,9 @@ static int ahash_update_no_ctx(struct ahash_request *req)
if (to_hash) {
int pad_nents;
int src_len = req->nbytes - *next_buflen;
src_nents = sg_nents_for_len(req->src,
req->nbytes - *next_buflen);
src_nents = sg_nents_for_len(req->src, src_len);
if (src_nents < 0) {
dev_err(jrdev, "Invalid number of src SG.\n");
return src_nents;
@ -1250,8 +1250,7 @@ static int ahash_update_no_ctx(struct ahash_request *req)
if (ret)
goto unmap_ctx;
sg_to_sec4_sg_last(req->src, mapped_nents,
edesc->sec4_sg + 1, 0);
sg_to_sec4_sg_last(req->src, src_len, edesc->sec4_sg + 1, 0);
if (*next_buflen) {
scatterwalk_map_and_copy(next_buf, req->src,

4
drivers/crypto/caam/caampkc.c
View File

@ -306,11 +306,11 @@ static struct rsa_edesc *rsa_edesc_alloc(struct akcipher_request *req,
0);
if (sec4_sg_index)
sg_to_sec4_sg_last(req_ctx->fixup_src, src_nents,
sg_to_sec4_sg_last(req_ctx->fixup_src, req_ctx->fixup_src_len,
edesc->sec4_sg + !!diff_size, 0);
if (dst_nents > 1)
sg_to_sec4_sg_last(req->dst, dst_nents,
sg_to_sec4_sg_last(req->dst, req->dst_len,
edesc->sec4_sg + sec4_sg_index, 0);
/* Save nents for later use in Job Descriptor */

18
drivers/crypto/caam/sg_sw_qm.h
View File

@ -54,15 +54,19 @@ static inline void dma_to_qm_sg_one_last_ext(struct qm_sg_entry *qm_sg_ptr,
* but does not have final bit; instead, returns last entry
*/
static inline struct qm_sg_entry *
sg_to_qm_sg(struct scatterlist *sg, int sg_count,
sg_to_qm_sg(struct scatterlist *sg, int len,
struct qm_sg_entry *qm_sg_ptr, u16 offset)
{
while (sg_count && sg) {
dma_to_qm_sg_one(qm_sg_ptr, sg_dma_address(sg),
sg_dma_len(sg), offset);
int ent_len;
while (len) {
ent_len = min_t(int, sg_dma_len(sg), len);
dma_to_qm_sg_one(qm_sg_ptr, sg_dma_address(sg), ent_len,
offset);
qm_sg_ptr++;
sg = sg_next(sg);
sg_count--;
len -= ent_len;
}
return qm_sg_ptr - 1;
}
@ -71,10 +75,10 @@ sg_to_qm_sg(struct scatterlist *sg, int sg_count,
* convert scatterlist to h/w link table format
* scatterlist must have been previously dma mapped
*/
static inline void sg_to_qm_sg_last(struct scatterlist *sg, int sg_count,
static inline void sg_to_qm_sg_last(struct scatterlist *sg, int len,
struct qm_sg_entry *qm_sg_ptr, u16 offset)
{
qm_sg_ptr = sg_to_qm_sg(sg, sg_count, qm_sg_ptr, offset);
qm_sg_ptr = sg_to_qm_sg(sg, len, qm_sg_ptr, offset);
qm_sg_entry_set_f(qm_sg_ptr, qm_sg_entry_get_len(qm_sg_ptr));
}

18
drivers/crypto/caam/sg_sw_qm2.h
View File

@ -25,15 +25,19 @@ static inline void dma_to_qm_sg_one(struct dpaa2_sg_entry *qm_sg_ptr,
* but does not have final bit; instead, returns last entry
*/
static inline struct dpaa2_sg_entry *
sg_to_qm_sg(struct scatterlist *sg, int sg_count,
sg_to_qm_sg(struct scatterlist *sg, int len,
struct dpaa2_sg_entry *qm_sg_ptr, u16 offset)
{
while (sg_count && sg) {
dma_to_qm_sg_one(qm_sg_ptr, sg_dma_address(sg),
sg_dma_len(sg), offset);
int ent_len;
while (len) {
ent_len = min_t(int, sg_dma_len(sg), len);
dma_to_qm_sg_one(qm_sg_ptr, sg_dma_address(sg), ent_len,
offset);
qm_sg_ptr++;
sg = sg_next(sg);
sg_count--;
len -= ent_len;
}
return qm_sg_ptr - 1;
}
@ -42,11 +46,11 @@ sg_to_qm_sg(struct scatterlist *sg, int sg_count,
* convert scatterlist to h/w link table format
* scatterlist must have been previously dma mapped
*/
static inline void sg_to_qm_sg_last(struct scatterlist *sg, int sg_count,
static inline void sg_to_qm_sg_last(struct scatterlist *sg, int len,
struct dpaa2_sg_entry *qm_sg_ptr,
u16 offset)
{
qm_sg_ptr = sg_to_qm_sg(sg, sg_count, qm_sg_ptr, offset);
qm_sg_ptr = sg_to_qm_sg(sg, len, qm_sg_ptr, offset);
dpaa2_sg_set_final(qm_sg_ptr, true);
}

18
drivers/crypto/caam/sg_sw_sec4.h
View File

@ -45,15 +45,19 @@ static inline void dma_to_sec4_sg_one(struct sec4_sg_entry *sec4_sg_ptr,
* but does not have final bit; instead, returns last entry
*/
static inline struct sec4_sg_entry *
sg_to_sec4_sg(struct scatterlist *sg, int sg_count,
sg_to_sec4_sg(struct scatterlist *sg, int len,
struct sec4_sg_entry *sec4_sg_ptr, u16 offset)
{
while (sg_count) {
dma_to_sec4_sg_one(sec4_sg_ptr, sg_dma_address(sg),
sg_dma_len(sg), offset);
int ent_len;
while (len) {
ent_len = min_t(int, sg_dma_len(sg), len);
dma_to_sec4_sg_one(sec4_sg_ptr, sg_dma_address(sg), ent_len,
offset);
sec4_sg_ptr++;
sg = sg_next(sg);
sg_count--;
len -= ent_len;
}
return sec4_sg_ptr - 1;
}
@ -70,11 +74,11 @@ static inline void sg_to_sec4_set_last(struct sec4_sg_entry *sec4_sg_ptr)
* convert scatterlist to h/w link table format
* scatterlist must have been previously dma mapped
*/
static inline void sg_to_sec4_sg_last(struct scatterlist *sg, int sg_count,
static inline void sg_to_sec4_sg_last(struct scatterlist *sg, int len,
struct sec4_sg_entry *sec4_sg_ptr,
u16 offset)
{
sec4_sg_ptr = sg_to_sec4_sg(sg, sg_count, sec4_sg_ptr, offset);
sec4_sg_ptr = sg_to_sec4_sg(sg, len, sec4_sg_ptr, offset);
sg_to_sec4_set_last(sec4_sg_ptr);
}