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authorPatrick McHardy <kaber@trash.net>2008-11-24 22:00:49 +0800
committerHerbert Xu <herbert@gondor.apana.org.au>2008-12-25 11:01:52 +1100
commit3416158680d5ba6fdb939e5bb52a8eba1ad5c027 (patch)
treed0da1237d5672f6cf2f403d43c57082d4c523a11
parent75741a034024f146ba5431602f3ad33a5df8363c (diff)
downloadlinux-linaro-stable-3416158680d5ba6fdb939e5bb52a8eba1ad5c027.tar.gz
crypto: hifn_795x - Don't copy src sg list
Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: Evgeniy Polyakov <zbr@ioremap.net> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
-rw-r--r--drivers/crypto/hifn_795x.c75
1 files changed, 33 insertions, 42 deletions
diff --git a/drivers/crypto/hifn_795x.c b/drivers/crypto/hifn_795x.c
index 27b8af983aae..2b4940bc8356 100644
--- a/drivers/crypto/hifn_795x.c
+++ b/drivers/crypto/hifn_795x.c
@@ -1378,32 +1378,40 @@ static int hifn_setup_dma(struct hifn_device *dev, struct hifn_context *ctx,
unsigned int soff, doff;
unsigned int n, len;
+ n = nbytes;
+ while (n) {
+ spage = sg_page(src);
+ soff = src->offset;
+ len = min(src->length, n);
+
+ dprintk("%s: spage: %p, soffset: %u, nbytes: %u, "
+ "priv: %p, ctx: %p.\n",
+ dev->name, spage, soff, nbytes, priv, ctx);
+ hifn_setup_src_desc(dev, spage, soff, len, n - len == 0);
+
+ src++;
+ n -= len;
+ }
+
t = &ctx->walk.cache[0];
n = nbytes;
while (n) {
if (t->length) {
- spage = dpage = sg_page(t);
- soff = doff = 0;
+ dpage = sg_page(t);
+ doff = 0;
len = t->length;
} else {
- spage = sg_page(src);
- soff = src->offset;
-
dpage = sg_page(dst);
doff = dst->offset;
-
len = dst->length;
}
len = min(len, n);
- dprintk("%s: spage: %p, soffset: %u, dpage: %p, doffset: %u, "
- "nbytes: %u, priv: %p, ctx: %p.\n",
- dev->name, spage, soff, dpage, doff, nbytes, priv, ctx);
-
- hifn_setup_src_desc(dev, spage, soff, len, n - len == 0);
+ dprintk("%s: dpage: %p, doffset: %u, nbytes: %u, "
+ "priv: %p, ctx: %p.\n",
+ dev->name, dpage, doff, nbytes, priv, ctx);
hifn_setup_dst_desc(dev, dpage, doff, len, n - len == 0);
- src++;
dst++;
t++;
n -= len;
@@ -1454,32 +1462,26 @@ static void ablkcipher_walk_exit(struct ablkcipher_walk *w)
w->num = 0;
}
-static int ablkcipher_add(void *daddr, unsigned int *drestp, struct scatterlist *src,
+static int ablkcipher_add(unsigned int *drestp, struct scatterlist *dst,
unsigned int size, unsigned int *nbytesp)
{
unsigned int copy, drest = *drestp, nbytes = *nbytesp;
int idx = 0;
- void *saddr;
if (drest < size || size > nbytes)
return -EINVAL;
while (size) {
- copy = min(drest, min(size, src->length));
-
- saddr = kmap_atomic(sg_page(src), KM_SOFTIRQ1);
- memcpy(daddr, saddr + src->offset, copy);
- kunmap_atomic(saddr, KM_SOFTIRQ1);
+ copy = min(drest, min(size, dst->length));
size -= copy;
drest -= copy;
nbytes -= copy;
- daddr += copy;
dprintk("%s: copy: %u, size: %u, drest: %u, nbytes: %u.\n",
__func__, copy, size, drest, nbytes);
- src++;
+ dst++;
idx++;
}
@@ -1492,8 +1494,7 @@ static int ablkcipher_add(void *daddr, unsigned int *drestp, struct scatterlist
static int ablkcipher_walk(struct ablkcipher_request *req,
struct ablkcipher_walk *w)
{
- struct scatterlist *src, *dst, *t;
- void *daddr;
+ struct scatterlist *dst, *t;
unsigned int nbytes = req->nbytes, offset, copy, diff;
int idx, tidx, err;
@@ -1503,26 +1504,22 @@ static int ablkcipher_walk(struct ablkcipher_request *req,
if (idx >= w->num && (w->flags & ASYNC_FLAGS_MISALIGNED))
return -EINVAL;
- src = &req->src[idx];
dst = &req->dst[idx];
- dprintk("\n%s: slen: %u, dlen: %u, soff: %u, doff: %u, offset: %u, "
- "nbytes: %u.\n",
- __func__, src->length, dst->length, src->offset,
- dst->offset, offset, nbytes);
+ dprintk("\n%s: dlen: %u, doff: %u, offset: %u, nbytes: %u.\n",
+ __func__, dst->length, dst->offset, offset, nbytes);
if (!IS_ALIGNED(dst->offset, HIFN_D_DST_DALIGN) ||
!IS_ALIGNED(dst->length, HIFN_D_DST_DALIGN) ||
offset) {
- unsigned slen = min(src->length - offset, nbytes);
+ unsigned slen = min(dst->length - offset, nbytes);
unsigned dlen = PAGE_SIZE;
t = &w->cache[idx];
- daddr = kmap_atomic(sg_page(t), KM_SOFTIRQ0);
- err = ablkcipher_add(daddr, &dlen, src, slen, &nbytes);
+ err = ablkcipher_add(&dlen, dst, slen, &nbytes);
if (err < 0)
- goto err_out_unmap;
+ return err;
idx += err;
@@ -1558,21 +1555,19 @@ static int ablkcipher_walk(struct ablkcipher_request *req,
} else {
copy += diff + nbytes;
- src = &req->src[idx];
+ dst = &req->dst[idx];
- err = ablkcipher_add(daddr + slen, &dlen, src, nbytes, &nbytes);
+ err = ablkcipher_add(&dlen, dst, nbytes, &nbytes);
if (err < 0)
- goto err_out_unmap;
+ return err;
idx += err;
}
t->length = copy;
t->offset = offset;
-
- kunmap_atomic(daddr, KM_SOFTIRQ0);
} else {
- nbytes -= min(src->length, nbytes);
+ nbytes -= min(dst->length, nbytes);
idx++;
}
@@ -1580,10 +1575,6 @@ static int ablkcipher_walk(struct ablkcipher_request *req,
}
return tidx;
-
-err_out_unmap:
- kunmap_atomic(daddr, KM_SOFTIRQ0);
- return err;
}
static int hifn_setup_session(struct ablkcipher_request *req)