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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>
This commit is contained in:
Patrick McHardy 2008-11-24 22:00:49 +08:00 committed by Herbert Xu
parent 75741a0340
commit 3416158680
1 changed files with 33 additions and 42 deletions
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75
drivers/crypto/hifn_795x.c
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@ -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)