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authorPatrick McHardy <kaber@trash.net>2008-11-24 21:59:25 +0800
committerHerbert Xu <herbert@gondor.apana.org.au>2008-12-25 11:01:51 +1100
commit75741a034024f146ba5431602f3ad33a5df8363c (patch)
treedff26a78946ac5c51f445f17cef3d69235ba04a9 /drivers/crypto
parent09fbf7c0f24176ef3b450c590f220ed8033dd2c3 (diff)
downloadlinux-linaro-stable-75741a034024f146ba5431602f3ad33a5df8363c.tar.gz
crypto: hifn_795x - Fix DMA setup
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>
Diffstat (limited to 'drivers/crypto')
-rw-r--r--drivers/crypto/hifn_795x.c165
1 files changed, 81 insertions, 84 deletions
diff --git a/drivers/crypto/hifn_795x.c b/drivers/crypto/hifn_795x.c
index 2969ea99f7c7..27b8af983aae 100644
--- a/drivers/crypto/hifn_795x.c
+++ b/drivers/crypto/hifn_795x.c
@@ -662,7 +662,6 @@ struct hifn_context
unsigned int keysize, ivsize;
u8 op, type, mode, unused;
struct ablkcipher_walk walk;
- atomic_t sg_num;
};
#define crypto_alg_to_hifn(a) container_of(a, struct hifn_crypto_alg, alg)
@@ -1284,7 +1283,7 @@ err_out:
}
static int hifn_setup_src_desc(struct hifn_device *dev, struct page *page,
- unsigned int offset, unsigned int size)
+ unsigned int offset, unsigned int size, int last)
{
struct hifn_dma *dma = (struct hifn_dma *)dev->desc_virt;
int idx;
@@ -1296,12 +1295,12 @@ static int hifn_setup_src_desc(struct hifn_device *dev, struct page *page,
dma->srcr[idx].p = __cpu_to_le32(addr);
dma->srcr[idx].l = __cpu_to_le32(size | HIFN_D_VALID |
- HIFN_D_MASKDONEIRQ | HIFN_D_LAST);
+ HIFN_D_MASKDONEIRQ | (last ? HIFN_D_LAST : 0));
if (++idx == HIFN_D_SRC_RSIZE) {
dma->srcr[idx].l = __cpu_to_le32(HIFN_D_VALID |
- HIFN_D_JUMP |
- HIFN_D_MASKDONEIRQ | HIFN_D_LAST);
+ HIFN_D_JUMP | HIFN_D_MASKDONEIRQ |
+ (last ? HIFN_D_LAST : 0));
idx = 0;
}
@@ -1342,7 +1341,7 @@ static void hifn_setup_res_desc(struct hifn_device *dev)
}
static void hifn_setup_dst_desc(struct hifn_device *dev, struct page *page,
- unsigned offset, unsigned size)
+ unsigned offset, unsigned size, int last)
{
struct hifn_dma *dma = (struct hifn_dma *)dev->desc_virt;
int idx;
@@ -1353,12 +1352,12 @@ static void hifn_setup_dst_desc(struct hifn_device *dev, struct page *page,
idx = dma->dsti;
dma->dstr[idx].p = __cpu_to_le32(addr);
dma->dstr[idx].l = __cpu_to_le32(size | HIFN_D_VALID |
- HIFN_D_MASKDONEIRQ | HIFN_D_LAST);
+ HIFN_D_MASKDONEIRQ | (last ? HIFN_D_LAST : 0));
if (++idx == HIFN_D_DST_RSIZE) {
dma->dstr[idx].l = __cpu_to_le32(HIFN_D_VALID |
HIFN_D_JUMP | HIFN_D_MASKDONEIRQ |
- HIFN_D_LAST);
+ (last ? HIFN_D_LAST : 0));
idx = 0;
}
dma->dsti = idx;
@@ -1370,16 +1369,47 @@ static void hifn_setup_dst_desc(struct hifn_device *dev, struct page *page,
}
}
-static int hifn_setup_dma(struct hifn_device *dev, struct page *spage, unsigned int soff,
- struct page *dpage, unsigned int doff, unsigned int nbytes, void *priv,
- struct hifn_context *ctx)
+static int hifn_setup_dma(struct hifn_device *dev, struct hifn_context *ctx,
+ struct scatterlist *src, struct scatterlist *dst,
+ unsigned int nbytes, void *priv)
{
- dprintk("%s: spage: %p, soffset: %u, dpage: %p, doffset: %u, nbytes: %u, priv: %p, ctx: %p.\n",
+ struct scatterlist *t;
+ struct page *spage, *dpage;
+ unsigned int soff, doff;
+ unsigned int n, len;
+
+ t = &ctx->walk.cache[0];
+ n = nbytes;
+ while (n) {
+ if (t->length) {
+ spage = dpage = sg_page(t);
+ soff = 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, nbytes);
+ hifn_setup_src_desc(dev, spage, soff, len, n - len == 0);
+ hifn_setup_dst_desc(dev, dpage, doff, len, n - len == 0);
+
+ src++;
+ dst++;
+ t++;
+ n -= len;
+ }
+
hifn_setup_cmd_desc(dev, ctx, priv, nbytes);
- hifn_setup_dst_desc(dev, dpage, doff, nbytes);
hifn_setup_res_desc(dev);
return 0;
}
@@ -1560,11 +1590,10 @@ static int hifn_setup_session(struct ablkcipher_request *req)
{
struct hifn_context *ctx = crypto_tfm_ctx(req->base.tfm);
struct hifn_device *dev = ctx->dev;
- struct page *spage, *dpage;
- unsigned long soff, doff, dlen, flags;
- unsigned int nbytes = req->nbytes, idx = 0, len;
+ unsigned long dlen, flags;
+ unsigned int nbytes = req->nbytes, idx = 0;
int err = -EINVAL, sg_num;
- struct scatterlist *src, *dst, *t;
+ struct scatterlist *dst;
if (ctx->iv && !ctx->ivsize && ctx->mode != ACRYPTO_MODE_ECB)
goto err_out_exit;
@@ -1589,15 +1618,11 @@ static int hifn_setup_session(struct ablkcipher_request *req)
return err;
}
- nbytes = req->nbytes;
- idx = 0;
-
sg_num = ablkcipher_walk(req, &ctx->walk);
if (sg_num < 0) {
err = sg_num;
goto err_out_exit;
}
- atomic_set(&ctx->sg_num, sg_num);
spin_lock_irqsave(&dev->lock, flags);
if (dev->started + sg_num > HIFN_QUEUE_LENGTH) {
@@ -1606,36 +1631,11 @@ static int hifn_setup_session(struct ablkcipher_request *req)
}
dev->snum++;
- dev->started += sg_num;
-
- while (nbytes) {
- src = &req->src[idx];
- dst = &req->dst[idx];
- t = &ctx->walk.cache[idx];
-
- if (t->length) {
- spage = dpage = sg_page(t);
- soff = doff = 0;
- len = t->length;
- } else {
- spage = sg_page(src);
- soff = src->offset;
-
- dpage = sg_page(dst);
- doff = dst->offset;
-
- len = dst->length;
- }
-
- idx++;
+ dev->started++;
- err = hifn_setup_dma(dev, spage, soff, dpage, doff, nbytes,
- req, ctx);
- if (err)
- goto err_out;
-
- nbytes -= min(len, nbytes);
- }
+ err = hifn_setup_dma(dev, ctx, req->src, req->dst, req->nbytes, req);
+ if (err)
+ goto err_out;
dev->active = HIFN_DEFAULT_ACTIVE_NUM;
spin_unlock_irqrestore(&dev->lock, flags);
@@ -1665,6 +1665,7 @@ static int hifn_test(struct hifn_device *dev, int encdec, u8 snum)
0xEF, 0x8A, 0x2C, 0x3B,
0x88, 0x4C, 0xFA, 0x59,
0xCA, 0x34, 0x2B, 0x2E};
+ struct scatterlist sg;
memset(src, 0, sizeof(src));
memset(ctx.key, 0, sizeof(ctx.key));
@@ -1676,12 +1677,11 @@ static int hifn_test(struct hifn_device *dev, int encdec, u8 snum)
ctx.op = (encdec)?ACRYPTO_OP_ENCRYPT:ACRYPTO_OP_DECRYPT;
ctx.mode = ACRYPTO_MODE_ECB;
ctx.type = ACRYPTO_TYPE_AES_128;
- atomic_set(&ctx.sg_num, 1);
+ ctx.walk.cache[0].length = 0;
- err = hifn_setup_dma(dev,
- virt_to_page(src), offset_in_page(src),
- virt_to_page(src), offset_in_page(src),
- sizeof(src), NULL, &ctx);
+ sg_init_one(&sg, &src, sizeof(src));
+
+ err = hifn_setup_dma(dev, &ctx, &sg, &sg, sizeof(src), NULL);
if (err)
goto err_out;
@@ -1772,53 +1772,50 @@ static void hifn_process_ready(struct ablkcipher_request *req, int error)
dprintk("%s: req: %p, ctx: %p.\n", __func__, req, ctx);
dev = ctx->dev;
- dprintk("%s: req: %p, started: %d, sg_num: %d.\n",
- __func__, req, dev->started, atomic_read(&ctx->sg_num));
+ dprintk("%s: req: %p, started: %d.\n", __func__, req, dev->started);
if (--dev->started < 0)
BUG();
- if (atomic_dec_and_test(&ctx->sg_num)) {
+ if (ctx->walk.flags & ASYNC_FLAGS_MISALIGNED) {
unsigned int nbytes = req->nbytes;
int idx = 0, err;
struct scatterlist *dst, *t;
void *saddr;
- if (ctx->walk.flags & ASYNC_FLAGS_MISALIGNED) {
- while (nbytes) {
- t = &ctx->walk.cache[idx];
- dst = &req->dst[idx];
+ while (nbytes) {
+ t = &ctx->walk.cache[idx];
+ dst = &req->dst[idx];
- dprintk("\n%s: sg_page(t): %p, t->length: %u, "
- "sg_page(dst): %p, dst->length: %u, "
- "nbytes: %u.\n",
- __func__, sg_page(t), t->length,
- sg_page(dst), dst->length, nbytes);
-
- if (!t->length) {
- nbytes -= min(dst->length, nbytes);
- idx++;
- continue;
- }
+ dprintk("\n%s: sg_page(t): %p, t->length: %u, "
+ "sg_page(dst): %p, dst->length: %u, "
+ "nbytes: %u.\n",
+ __func__, sg_page(t), t->length,
+ sg_page(dst), dst->length, nbytes);
- saddr = kmap_atomic(sg_page(t), KM_IRQ1);
+ if (!t->length) {
+ nbytes -= min(dst->length, nbytes);
+ idx++;
+ continue;
+ }
- err = ablkcipher_get(saddr, &t->length, t->offset,
- dst, nbytes, &nbytes);
- if (err < 0) {
- kunmap_atomic(saddr, KM_IRQ1);
- break;
- }
+ saddr = kmap_atomic(sg_page(t), KM_IRQ1);
- idx += err;
+ err = ablkcipher_get(saddr, &t->length, t->offset,
+ dst, nbytes, &nbytes);
+ if (err < 0) {
kunmap_atomic(saddr, KM_IRQ1);
+ break;
}
- ablkcipher_walk_exit(&ctx->walk);
+ idx += err;
+ kunmap_atomic(saddr, KM_IRQ1);
}
- req->base.complete(&req->base, error);
+ ablkcipher_walk_exit(&ctx->walk);
}
+
+ req->base.complete(&req->base, error);
}
static void hifn_check_for_completion(struct hifn_device *dev, int error)