From a38acd236cac914aafffd80af79b9556fc2c3934 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Horia=20Geant=C4=83?= <horia.geanta@nxp.com>
Date: Wed, 28 Mar 2018 15:39:17 +0300
Subject: [PATCH] crypto: caam - fix DMA mapping dir for generated IV
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Git-commit: a38acd236cac914aafffd80af79b9556fc2c3934
Patch-mainline: v4.18-rc1
References: bsc#1051510
In case of GIVCIPHER, IV is generated by the device.
Fix the DMA mapping direction.
Cc: <stable@vger.kernel.org> # 3.19+
Fixes: 7222d1a34103 ("crypto: caam - add support for givencrypt cbc(aes) and rfc3686(ctr(aes))")
Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/crypto/caam/caamalg.c | 29 +++++++++++++++++------------
1 file changed, 17 insertions(+), 12 deletions(-)
diff --git a/drivers/crypto/caam/caamalg.c b/drivers/crypto/caam/caamalg.c
index 7207a535942d..3e18b9266027 100644
--- a/drivers/crypto/caam/caamalg.c
+++ b/drivers/crypto/caam/caamalg.c
@@ -769,6 +769,7 @@ struct aead_edesc {
* @src_nents: number of segments in input s/w scatterlist
* @dst_nents: number of segments in output s/w scatterlist
* @iv_dma: dma address of iv for checking continuity and link table
+ * @iv_dir: DMA mapping direction for IV
* @sec4_sg_bytes: length of dma mapped sec4_sg space
* @sec4_sg_dma: bus physical mapped address of h/w link table
* @sec4_sg: pointer to h/w link table
@@ -778,6 +779,7 @@ struct ablkcipher_edesc {
int src_nents;
int dst_nents;
dma_addr_t iv_dma;
+ enum dma_data_direction iv_dir;
int sec4_sg_bytes;
dma_addr_t sec4_sg_dma;
struct sec4_sg_entry *sec4_sg;
@@ -787,7 +789,8 @@ struct ablkcipher_edesc {
static void caam_unmap(struct device *dev, struct scatterlist *src,
struct scatterlist *dst, int src_nents,
int dst_nents,
- dma_addr_t iv_dma, int ivsize, dma_addr_t sec4_sg_dma,
+ dma_addr_t iv_dma, int ivsize,
+ enum dma_data_direction iv_dir, dma_addr_t sec4_sg_dma,
int sec4_sg_bytes)
{
if (dst != src) {
@@ -799,7 +802,7 @@ static void caam_unmap(struct device *dev, struct scatterlist *src,
}
if (iv_dma)
- dma_unmap_single(dev, iv_dma, ivsize, DMA_TO_DEVICE);
+ dma_unmap_single(dev, iv_dma, ivsize, iv_dir);
if (sec4_sg_bytes)
dma_unmap_single(dev, sec4_sg_dma, sec4_sg_bytes,
DMA_TO_DEVICE);
@@ -810,7 +813,7 @@ static void aead_unmap(struct device *dev,
struct aead_request *req)
{
caam_unmap(dev, req->src, req->dst,
- edesc->src_nents, edesc->dst_nents, 0, 0,
+ edesc->src_nents, edesc->dst_nents, 0, 0, DMA_NONE,
edesc->sec4_sg_dma, edesc->sec4_sg_bytes);
}
@@ -823,7 +826,7 @@ static void ablkcipher_unmap(struct device *dev,
caam_unmap(dev, req->src, req->dst,
edesc->src_nents, edesc->dst_nents,
- edesc->iv_dma, ivsize,
+ edesc->iv_dma, ivsize, edesc->iv_dir,
edesc->sec4_sg_dma, edesc->sec4_sg_bytes);
}
@@ -1287,7 +1290,7 @@ static struct aead_edesc *aead_edesc_alloc(struct aead_request *req,
GFP_DMA | flags);
if (!edesc) {
caam_unmap(jrdev, req->src, req->dst, src_nents, dst_nents, 0,
- 0, 0, 0);
+ 0, DMA_NONE, 0, 0);
return ERR_PTR(-ENOMEM);
}
@@ -1550,7 +1553,7 @@ static struct ablkcipher_edesc *ablkcipher_edesc_alloc(struct ablkcipher_request
if (dma_mapping_error(jrdev, iv_dma)) {
dev_err(jrdev, "unable to map IV\n");
caam_unmap(jrdev, req->src, req->dst, src_nents, dst_nents, 0,
- 0, 0, 0);
+ 0, DMA_NONE, 0, 0);
return ERR_PTR(-ENOMEM);
}
@@ -1572,7 +1575,7 @@ static struct ablkcipher_edesc *ablkcipher_edesc_alloc(struct ablkcipher_request
if (!edesc) {
dev_err(jrdev, "could not allocate extended descriptor\n");
caam_unmap(jrdev, req->src, req->dst, src_nents, dst_nents,
- iv_dma, ivsize, 0, 0);
+ iv_dma, ivsize, DMA_TO_DEVICE, 0, 0);
return ERR_PTR(-ENOMEM);
}
@@ -1581,6 +1584,7 @@ static struct ablkcipher_edesc *ablkcipher_edesc_alloc(struct ablkcipher_request
edesc->sec4_sg_bytes = sec4_sg_bytes;
edesc->sec4_sg = (void *)edesc + sizeof(struct ablkcipher_edesc) +
desc_bytes;
+ edesc->iv_dir = DMA_TO_DEVICE;
if (!in_contig) {
dma_to_sec4_sg_one(edesc->sec4_sg, iv_dma, ivsize, 0);
@@ -1598,7 +1602,7 @@ static struct ablkcipher_edesc *ablkcipher_edesc_alloc(struct ablkcipher_request
if (dma_mapping_error(jrdev, edesc->sec4_sg_dma)) {
dev_err(jrdev, "unable to map S/G table\n");
caam_unmap(jrdev, req->src, req->dst, src_nents, dst_nents,
- iv_dma, ivsize, 0, 0);
+ iv_dma, ivsize, DMA_TO_DEVICE, 0, 0);
kfree(edesc);
return ERR_PTR(-ENOMEM);
}
@@ -1756,11 +1760,11 @@ static struct ablkcipher_edesc *ablkcipher_giv_edesc_alloc(
* Check if iv can be contiguous with source and destination.
* If so, include it. If not, create scatterlist.
*/
- iv_dma = dma_map_single(jrdev, greq->giv, ivsize, DMA_TO_DEVICE);
+ iv_dma = dma_map_single(jrdev, greq->giv, ivsize, DMA_FROM_DEVICE);
if (dma_mapping_error(jrdev, iv_dma)) {
dev_err(jrdev, "unable to map IV\n");
caam_unmap(jrdev, req->src, req->dst, src_nents, dst_nents, 0,
- 0, 0, 0);
+ 0, DMA_NONE, 0, 0);
return ERR_PTR(-ENOMEM);
}
@@ -1781,7 +1785,7 @@ static struct ablkcipher_edesc *ablkcipher_giv_edesc_alloc(
if (!edesc) {
dev_err(jrdev, "could not allocate extended descriptor\n");
caam_unmap(jrdev, req->src, req->dst, src_nents, dst_nents,
- iv_dma, ivsize, 0, 0);
+ iv_dma, ivsize, DMA_FROM_DEVICE, 0, 0);
return ERR_PTR(-ENOMEM);
}
@@ -1790,6 +1794,7 @@ static struct ablkcipher_edesc *ablkcipher_giv_edesc_alloc(
edesc->sec4_sg_bytes = sec4_sg_bytes;
edesc->sec4_sg = (void *)edesc + sizeof(struct ablkcipher_edesc) +
desc_bytes;
+ edesc->iv_dir = DMA_FROM_DEVICE;
if (mapped_src_nents > 1)
sg_to_sec4_sg_last(req->src, mapped_src_nents, edesc->sec4_sg,
@@ -1807,7 +1812,7 @@ static struct ablkcipher_edesc *ablkcipher_giv_edesc_alloc(
if (dma_mapping_error(jrdev, edesc->sec4_sg_dma)) {
dev_err(jrdev, "unable to map S/G table\n");
caam_unmap(jrdev, req->src, req->dst, src_nents, dst_nents,
- iv_dma, ivsize, 0, 0);
+ iv_dma, ivsize, DMA_FROM_DEVICE, 0, 0);
kfree(edesc);
return ERR_PTR(-ENOMEM);
}
--
2.17.1