diff options
Diffstat (limited to 'drivers/crypto/marvell/cipher.c')
| -rw-r--r-- | drivers/crypto/marvell/cipher.c | 179 |
1 files changed, 174 insertions, 5 deletions
diff --git a/drivers/crypto/marvell/cipher.c b/drivers/crypto/marvell/cipher.c index e6eea488f11e..e21783b83046 100644 --- a/drivers/crypto/marvell/cipher.c +++ b/drivers/crypto/marvell/cipher.c @@ -21,6 +21,55 @@ struct mv_cesa_aes_ctx { struct crypto_aes_ctx aes; }; +struct mv_cesa_ablkcipher_dma_iter { + struct mv_cesa_dma_iter base; + struct mv_cesa_sg_dma_iter src; + struct mv_cesa_sg_dma_iter dst; +}; + +static inline void +mv_cesa_ablkcipher_req_iter_init(struct mv_cesa_ablkcipher_dma_iter *iter, + struct ablkcipher_request *req) +{ + mv_cesa_req_dma_iter_init(&iter->base, req->nbytes); + mv_cesa_sg_dma_iter_init(&iter->src, req->src, DMA_TO_DEVICE); + mv_cesa_sg_dma_iter_init(&iter->dst, req->dst, DMA_FROM_DEVICE); +} + +static inline bool +mv_cesa_ablkcipher_req_iter_next_op(struct mv_cesa_ablkcipher_dma_iter *iter) +{ + iter->src.op_offset = 0; + iter->dst.op_offset = 0; + + return mv_cesa_req_dma_iter_next_op(&iter->base); +} + +static inline void +mv_cesa_ablkcipher_dma_cleanup(struct ablkcipher_request *req) +{ + struct mv_cesa_ablkcipher_req *creq = ablkcipher_request_ctx(req); + + if (req->dst != req->src) { + dma_unmap_sg(cesa_dev->dev, req->dst, creq->dst_nents, + DMA_FROM_DEVICE); + dma_unmap_sg(cesa_dev->dev, req->src, creq->src_nents, + DMA_TO_DEVICE); + } else { + dma_unmap_sg(cesa_dev->dev, req->src, creq->src_nents, + DMA_BIDIRECTIONAL); + } + mv_cesa_dma_cleanup(&creq->req.dma); +} + +static inline void mv_cesa_ablkcipher_cleanup(struct ablkcipher_request *req) +{ + struct mv_cesa_ablkcipher_req *creq = ablkcipher_request_ctx(req); + + if (creq->req.base.type == CESA_DMA_REQ) + mv_cesa_ablkcipher_dma_cleanup(req); +} + static void mv_cesa_ablkcipher_std_step(struct ablkcipher_request *req) { struct mv_cesa_ablkcipher_req *creq = ablkcipher_request_ctx(req); @@ -77,7 +126,11 @@ static int mv_cesa_ablkcipher_process(struct crypto_async_request *req, struct mv_cesa_engine *engine = sreq->base.engine; int ret; - ret = mv_cesa_ablkcipher_std_process(ablkreq, status); + if (creq->req.base.type == CESA_DMA_REQ) + ret = mv_cesa_dma_process(&creq->req.dma, status); + else + ret = mv_cesa_ablkcipher_std_process(ablkreq, status); + if (ret) return ret; @@ -90,8 +143,21 @@ static int mv_cesa_ablkcipher_process(struct crypto_async_request *req, static void mv_cesa_ablkcipher_step(struct crypto_async_request *req) { struct ablkcipher_request *ablkreq = ablkcipher_request_cast(req); + struct mv_cesa_ablkcipher_req *creq = ablkcipher_request_ctx(ablkreq); - mv_cesa_ablkcipher_std_step(ablkreq); + if (creq->req.base.type == CESA_DMA_REQ) + mv_cesa_dma_step(&creq->req.dma); + else + mv_cesa_ablkcipher_std_step(ablkreq); +} + +static inline void +mv_cesa_ablkcipher_dma_prepare(struct ablkcipher_request *req) +{ + struct mv_cesa_ablkcipher_req *creq = ablkcipher_request_ctx(req); + struct mv_cesa_tdma_req *dreq = &creq->req.dma; + + mv_cesa_dma_prepare(dreq, dreq->base.engine); } static inline void @@ -115,12 +181,18 @@ static inline void mv_cesa_ablkcipher_prepare(struct crypto_async_request *req, creq->req.base.engine = engine; - mv_cesa_ablkcipher_std_prepare(ablkreq); + if (creq->req.base.type == CESA_DMA_REQ) + mv_cesa_ablkcipher_dma_prepare(ablkreq); + else + mv_cesa_ablkcipher_std_prepare(ablkreq); } static inline void mv_cesa_ablkcipher_req_cleanup(struct crypto_async_request *req) { + struct ablkcipher_request *ablkreq = ablkcipher_request_cast(req); + + mv_cesa_ablkcipher_cleanup(ablkreq); } static const struct mv_cesa_req_ops mv_cesa_ablkcipher_req_ops = { @@ -166,6 +238,92 @@ static int mv_cesa_aes_setkey(struct crypto_ablkcipher *cipher, const u8 *key, return 0; } +static int mv_cesa_ablkcipher_dma_req_init(struct ablkcipher_request *req, + const struct mv_cesa_op_ctx *op_templ) +{ + struct mv_cesa_ablkcipher_req *creq = ablkcipher_request_ctx(req); + gfp_t flags = (req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP) ? + GFP_KERNEL : GFP_ATOMIC; + struct mv_cesa_tdma_req *dreq = &creq->req.dma; + struct mv_cesa_ablkcipher_dma_iter iter; + struct mv_cesa_tdma_chain chain; + bool skip_ctx = false; + int ret; + + dreq->base.type = CESA_DMA_REQ; + dreq->chain.first = NULL; + dreq->chain.last = NULL; + + if (req->src != req->dst) { + ret = dma_map_sg(cesa_dev->dev, req->src, creq->src_nents, + DMA_TO_DEVICE); + if (!ret) + return -ENOMEM; + + ret = dma_map_sg(cesa_dev->dev, req->dst, creq->dst_nents, + DMA_FROM_DEVICE); + if (!ret) { + ret = -ENOMEM; + goto err_unmap_src; + } + } else { + ret = dma_map_sg(cesa_dev->dev, req->src, creq->src_nents, + DMA_BIDIRECTIONAL); + if (!ret) + return -ENOMEM; + } + + mv_cesa_tdma_desc_iter_init(&chain); + mv_cesa_ablkcipher_req_iter_init(&iter, req); + + do { + struct mv_cesa_op_ctx *op; + + op = mv_cesa_dma_add_op(&chain, op_templ, skip_ctx, flags); + if (IS_ERR(op)) { + ret = PTR_ERR(op); + goto err_free_tdma; + } + skip_ctx = true; + + mv_cesa_set_crypt_op_len(op, iter.base.op_len); + + /* Add input transfers */ + ret = mv_cesa_dma_add_op_transfers(&chain, &iter.base, + &iter.src, flags); + if (ret) + goto err_free_tdma; + + /* Add dummy desc to launch the crypto operation */ + ret = mv_cesa_dma_add_dummy_launch(&chain, flags); + if (ret) + goto err_free_tdma; + + /* Add output transfers */ + ret = mv_cesa_dma_add_op_transfers(&chain, &iter.base, + &iter.dst, flags); + if (ret) + goto err_free_tdma; + + } while (mv_cesa_ablkcipher_req_iter_next_op(&iter)); + + dreq->chain = chain; + + return 0; + +err_free_tdma: + mv_cesa_dma_cleanup(dreq); + if (req->dst != req->src) + dma_unmap_sg(cesa_dev->dev, req->dst, creq->dst_nents, + DMA_FROM_DEVICE); + +err_unmap_src: + dma_unmap_sg(cesa_dev->dev, req->src, creq->src_nents, + req->dst != req->src ? DMA_TO_DEVICE : DMA_BIDIRECTIONAL); + + return ret; +} + static inline int mv_cesa_ablkcipher_std_req_init(struct ablkcipher_request *req, const struct mv_cesa_op_ctx *op_templ) @@ -186,6 +344,7 @@ static int mv_cesa_ablkcipher_req_init(struct ablkcipher_request *req, struct mv_cesa_ablkcipher_req *creq = ablkcipher_request_ctx(req); struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req); unsigned int blksize = crypto_ablkcipher_blocksize(tfm); + int ret; if (!IS_ALIGNED(req->nbytes, blksize)) return -EINVAL; @@ -196,7 +355,13 @@ static int mv_cesa_ablkcipher_req_init(struct ablkcipher_request *req, mv_cesa_update_op_cfg(tmpl, CESA_SA_DESC_CFG_OP_CRYPT_ONLY, CESA_SA_DESC_CFG_OP_MSK); - return mv_cesa_ablkcipher_std_req_init(req, tmpl); + /* TODO: add a threshold for DMA usage */ + if (cesa_dev->caps->has_tdma) + ret = mv_cesa_ablkcipher_dma_req_init(req, tmpl); + else + ret = mv_cesa_ablkcipher_std_req_init(req, tmpl); + + return ret; } static int mv_cesa_aes_op(struct ablkcipher_request *req, @@ -230,7 +395,11 @@ static int mv_cesa_aes_op(struct ablkcipher_request *req, if (ret) return ret; - return mv_cesa_queue_req(&req->base); + ret = mv_cesa_queue_req(&req->base); + if (ret && ret != -EINPROGRESS) + mv_cesa_ablkcipher_cleanup(req); + + return ret; } static int mv_cesa_ecb_aes_encrypt(struct ablkcipher_request *req) |
