diff options
author | Patrick McHardy <kaber@trash.net> | 2008-11-24 21:59:25 +0800 |
---|---|---|
committer | Herbert Xu <herbert@gondor.apana.org.au> | 2008-12-25 11:01:51 +1100 |
commit | 75741a034024f146ba5431602f3ad33a5df8363c (patch) | |
tree | dff26a78946ac5c51f445f17cef3d69235ba04a9 /drivers/crypto | |
parent | 09fbf7c0f24176ef3b450c590f220ed8033dd2c3 (diff) | |
download | kernel_samsung_smdk4412-75741a034024f146ba5431602f3ad33a5df8363c.zip kernel_samsung_smdk4412-75741a034024f146ba5431602f3ad33a5df8363c.tar.gz kernel_samsung_smdk4412-75741a034024f146ba5431602f3ad33a5df8363c.tar.bz2 |
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.c | 165 |
1 files changed, 81 insertions, 84 deletions
diff --git a/drivers/crypto/hifn_795x.c b/drivers/crypto/hifn_795x.c index 2969ea9..27b8af9 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) |