diff options
Diffstat (limited to 'drivers/crypto/marvell/hash.c')
| -rw-r--r-- | drivers/crypto/marvell/hash.c | 414 |
1 files changed, 404 insertions, 10 deletions
diff --git a/drivers/crypto/marvell/hash.c b/drivers/crypto/marvell/hash.c index 2d33f6816c31..528da260a7cc 100644 --- a/drivers/crypto/marvell/hash.c +++ b/drivers/crypto/marvell/hash.c @@ -16,6 +16,47 @@ #include "cesa.h" +struct mv_cesa_ahash_dma_iter { + struct mv_cesa_dma_iter base; + struct mv_cesa_sg_dma_iter src; +}; + +static inline void +mv_cesa_ahash_req_iter_init(struct mv_cesa_ahash_dma_iter *iter, + struct ahash_request *req) +{ + struct mv_cesa_ahash_req *creq = ahash_request_ctx(req); + unsigned int len = req->nbytes; + + if (!creq->last_req) + len = (len + creq->cache_ptr) & ~CESA_HASH_BLOCK_SIZE_MSK; + + mv_cesa_req_dma_iter_init(&iter->base, len); + mv_cesa_sg_dma_iter_init(&iter->src, req->src, DMA_TO_DEVICE); + iter->src.op_offset = creq->cache_ptr; +} + +static inline bool +mv_cesa_ahash_req_iter_next_op(struct mv_cesa_ahash_dma_iter *iter) +{ + iter->src.op_offset = 0; + + return mv_cesa_req_dma_iter_next_op(&iter->base); +} + +static inline int mv_cesa_ahash_dma_alloc_cache(struct mv_cesa_ahash_req *creq, + gfp_t flags) +{ + struct mv_cesa_ahash_dma_req *dreq = &creq->req.dma; + + creq->cache = dma_pool_alloc(cesa_dev->dma->cache_pool, flags, + &dreq->cache_dma); + if (!creq->cache) + return -ENOMEM; + + return 0; +} + static inline int mv_cesa_ahash_std_alloc_cache(struct mv_cesa_ahash_req *creq, gfp_t flags) { @@ -31,11 +72,23 @@ static int mv_cesa_ahash_alloc_cache(struct ahash_request *req) struct mv_cesa_ahash_req *creq = ahash_request_ctx(req); gfp_t flags = (req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP) ? GFP_KERNEL : GFP_ATOMIC; + int ret; if (creq->cache) return 0; - return mv_cesa_ahash_std_alloc_cache(creq, flags); + if (creq->req.base.type == CESA_DMA_REQ) + ret = mv_cesa_ahash_dma_alloc_cache(creq, flags); + else + ret = mv_cesa_ahash_std_alloc_cache(creq, flags); + + return ret; +} + +static inline void mv_cesa_ahash_dma_free_cache(struct mv_cesa_ahash_req *creq) +{ + dma_pool_free(cesa_dev->dma->cache_pool, creq->cache, + creq->req.dma.cache_dma); } static inline void mv_cesa_ahash_std_free_cache(struct mv_cesa_ahash_req *creq) @@ -48,16 +101,69 @@ static void mv_cesa_ahash_free_cache(struct mv_cesa_ahash_req *creq) if (!creq->cache) return; - mv_cesa_ahash_std_free_cache(creq); + if (creq->req.base.type == CESA_DMA_REQ) + mv_cesa_ahash_dma_free_cache(creq); + else + mv_cesa_ahash_std_free_cache(creq); creq->cache = NULL; } +static int mv_cesa_ahash_dma_alloc_padding(struct mv_cesa_ahash_dma_req *req, + gfp_t flags) +{ + if (req->padding) + return 0; + + req->padding = dma_pool_alloc(cesa_dev->dma->padding_pool, flags, + &req->padding_dma); + if (!req->padding) + return -ENOMEM; + + return 0; +} + +static void mv_cesa_ahash_dma_free_padding(struct mv_cesa_ahash_dma_req *req) +{ + if (!req->padding) + return; + + dma_pool_free(cesa_dev->dma->padding_pool, req->padding, + req->padding_dma); + req->padding = NULL; +} + +static inline void mv_cesa_ahash_dma_last_cleanup(struct ahash_request *req) +{ + struct mv_cesa_ahash_req *creq = ahash_request_ctx(req); + + mv_cesa_ahash_dma_free_padding(&creq->req.dma); +} + +static inline void mv_cesa_ahash_dma_cleanup(struct ahash_request *req) +{ + struct mv_cesa_ahash_req *creq = ahash_request_ctx(req); + + dma_unmap_sg(cesa_dev->dev, req->src, creq->src_nents, DMA_TO_DEVICE); + mv_cesa_dma_cleanup(&creq->req.dma.base); +} + +static inline void mv_cesa_ahash_cleanup(struct ahash_request *req) +{ + struct mv_cesa_ahash_req *creq = ahash_request_ctx(req); + + if (creq->req.base.type == CESA_DMA_REQ) + mv_cesa_ahash_dma_cleanup(req); +} + static void mv_cesa_ahash_last_cleanup(struct ahash_request *req) { struct mv_cesa_ahash_req *creq = ahash_request_ctx(req); mv_cesa_ahash_free_cache(creq); + + if (creq->req.base.type == CESA_DMA_REQ) + mv_cesa_ahash_dma_last_cleanup(req); } static int mv_cesa_ahash_pad_len(struct mv_cesa_ahash_req *creq) @@ -183,6 +289,14 @@ static int mv_cesa_ahash_std_process(struct ahash_request *req, u32 status) return 0; } +static inline void mv_cesa_ahash_dma_prepare(struct ahash_request *req) +{ + struct mv_cesa_ahash_req *creq = ahash_request_ctx(req); + struct mv_cesa_tdma_req *dreq = &creq->req.dma.base; + + mv_cesa_dma_prepare(dreq, dreq->base.engine); +} + static void mv_cesa_ahash_std_prepare(struct ahash_request *req) { struct mv_cesa_ahash_req *creq = ahash_request_ctx(req); @@ -197,8 +311,12 @@ static void mv_cesa_ahash_std_prepare(struct ahash_request *req) static void mv_cesa_ahash_step(struct crypto_async_request *req) { struct ahash_request *ahashreq = ahash_request_cast(req); + struct mv_cesa_ahash_req *creq = ahash_request_ctx(ahashreq); - mv_cesa_ahash_std_step(ahashreq); + if (creq->req.base.type == CESA_DMA_REQ) + mv_cesa_dma_step(&creq->req.dma.base); + else + mv_cesa_ahash_std_step(ahashreq); } static int mv_cesa_ahash_process(struct crypto_async_request *req, u32 status) @@ -209,7 +327,11 @@ static int mv_cesa_ahash_process(struct crypto_async_request *req, u32 status) unsigned int digsize; int ret, i; - ret = mv_cesa_ahash_std_process(ahashreq, status); + if (creq->req.base.type == CESA_DMA_REQ) + ret = mv_cesa_dma_process(&creq->req.dma.base, status); + else + ret = mv_cesa_ahash_std_process(ahashreq, status); + if (ret == -EINPROGRESS) return ret; @@ -243,7 +365,10 @@ static void mv_cesa_ahash_prepare(struct crypto_async_request *req, creq->req.base.engine = engine; - mv_cesa_ahash_std_prepare(ahashreq); + if (creq->req.base.type == CESA_DMA_REQ) + mv_cesa_ahash_dma_prepare(ahashreq); + else + mv_cesa_ahash_std_prepare(ahashreq); digsize = crypto_ahash_digestsize(crypto_ahash_reqtfm(ahashreq)); for (i = 0; i < digsize / 4; i++) @@ -258,6 +383,8 @@ static void mv_cesa_ahash_req_cleanup(struct crypto_async_request *req) if (creq->last_req) mv_cesa_ahash_last_cleanup(ahashreq); + + mv_cesa_ahash_cleanup(ahashreq); } static const struct mv_cesa_req_ops mv_cesa_ahash_req_ops = { @@ -325,14 +452,267 @@ static int mv_cesa_ahash_cache_req(struct ahash_request *req, bool *cached) return 0; } +static struct mv_cesa_op_ctx * +mv_cesa_ahash_dma_add_cache(struct mv_cesa_tdma_chain *chain, + struct mv_cesa_ahash_dma_iter *dma_iter, + struct mv_cesa_ahash_req *creq, + gfp_t flags) +{ + struct mv_cesa_ahash_dma_req *ahashdreq = &creq->req.dma; + struct mv_cesa_op_ctx *op = NULL; + int ret; + + if (!creq->cache_ptr) + return NULL; + + ret = mv_cesa_dma_add_data_transfer(chain, + CESA_SA_DATA_SRAM_OFFSET, + ahashdreq->cache_dma, + creq->cache_ptr, + CESA_TDMA_DST_IN_SRAM, + flags); + if (ret) + return ERR_PTR(ret); + + if (!dma_iter->base.op_len) { + op = mv_cesa_dma_add_op(chain, &creq->op_tmpl, false, flags); + if (IS_ERR(op)) + return op; + + mv_cesa_set_mac_op_frag_len(op, creq->cache_ptr); + + /* Add dummy desc to launch crypto operation */ + ret = mv_cesa_dma_add_dummy_launch(chain, flags); + if (ret) + return ERR_PTR(ret); + } + + return op; +} + +static struct mv_cesa_op_ctx * +mv_cesa_ahash_dma_add_data(struct mv_cesa_tdma_chain *chain, + struct mv_cesa_ahash_dma_iter *dma_iter, + struct mv_cesa_ahash_req *creq, + gfp_t flags) +{ + struct mv_cesa_op_ctx *op; + int ret; + + op = mv_cesa_dma_add_op(chain, &creq->op_tmpl, false, flags); + if (IS_ERR(op)) + return op; + + mv_cesa_set_mac_op_frag_len(op, dma_iter->base.op_len); + + if ((mv_cesa_get_op_cfg(&creq->op_tmpl) & CESA_SA_DESC_CFG_FRAG_MSK) == + CESA_SA_DESC_CFG_FIRST_FRAG) + mv_cesa_update_op_cfg(&creq->op_tmpl, + CESA_SA_DESC_CFG_MID_FRAG, + CESA_SA_DESC_CFG_FRAG_MSK); + + /* Add input transfers */ + ret = mv_cesa_dma_add_op_transfers(chain, &dma_iter->base, + &dma_iter->src, flags); + if (ret) + return ERR_PTR(ret); + + /* Add dummy desc to launch crypto operation */ + ret = mv_cesa_dma_add_dummy_launch(chain, flags); + if (ret) + return ERR_PTR(ret); + + return op; +} + +static struct mv_cesa_op_ctx * +mv_cesa_ahash_dma_last_req(struct mv_cesa_tdma_chain *chain, + struct mv_cesa_ahash_dma_iter *dma_iter, + struct mv_cesa_ahash_req *creq, + struct mv_cesa_op_ctx *op, + gfp_t flags) +{ + struct mv_cesa_ahash_dma_req *ahashdreq = &creq->req.dma; + unsigned int len, trailerlen, padoff = 0; + int ret; + + if (!creq->last_req) + return op; + + if (op && creq->len <= CESA_SA_DESC_MAC_SRC_TOTAL_LEN_MAX) { + u32 frag = CESA_SA_DESC_CFG_NOT_FRAG; + + if ((mv_cesa_get_op_cfg(op) & CESA_SA_DESC_CFG_FRAG_MSK) != + CESA_SA_DESC_CFG_FIRST_FRAG) + frag = CESA_SA_DESC_CFG_LAST_FRAG; + + mv_cesa_update_op_cfg(op, frag, CESA_SA_DESC_CFG_FRAG_MSK); + + return op; + } + + ret = mv_cesa_ahash_dma_alloc_padding(ahashdreq, flags); + if (ret) + return ERR_PTR(ret); + + trailerlen = mv_cesa_ahash_pad_req(creq, ahashdreq->padding); + + if (op) { + len = min(CESA_SA_SRAM_PAYLOAD_SIZE - dma_iter->base.op_len, + trailerlen); + if (len) { + ret = mv_cesa_dma_add_data_transfer(chain, + CESA_SA_DATA_SRAM_OFFSET + + dma_iter->base.op_len, + ahashdreq->padding_dma, + len, CESA_TDMA_DST_IN_SRAM, + flags); + if (ret) + return ERR_PTR(ret); + + mv_cesa_update_op_cfg(op, CESA_SA_DESC_CFG_MID_FRAG, + CESA_SA_DESC_CFG_FRAG_MSK); + mv_cesa_set_mac_op_frag_len(op, + dma_iter->base.op_len + len); + padoff += len; + } + } + + if (padoff >= trailerlen) + return op; + + if ((mv_cesa_get_op_cfg(&creq->op_tmpl) & CESA_SA_DESC_CFG_FRAG_MSK) != + CESA_SA_DESC_CFG_FIRST_FRAG) + mv_cesa_update_op_cfg(&creq->op_tmpl, + CESA_SA_DESC_CFG_MID_FRAG, + CESA_SA_DESC_CFG_FRAG_MSK); + + op = mv_cesa_dma_add_op(chain, &creq->op_tmpl, false, flags); + if (IS_ERR(op)) + return op; + + mv_cesa_set_mac_op_frag_len(op, trailerlen - padoff); + + ret = mv_cesa_dma_add_data_transfer(chain, + CESA_SA_DATA_SRAM_OFFSET, + ahashdreq->padding_dma + + padoff, + trailerlen - padoff, + CESA_TDMA_DST_IN_SRAM, + flags); + if (ret) + return ERR_PTR(ret); + + /* Add dummy desc to launch crypto operation */ + ret = mv_cesa_dma_add_dummy_launch(chain, flags); + if (ret) + return ERR_PTR(ret); + + return op; +} + +static int mv_cesa_ahash_dma_req_init(struct ahash_request *req) +{ + struct mv_cesa_ahash_req *creq = ahash_request_ctx(req); + gfp_t flags = (req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP) ? + GFP_KERNEL : GFP_ATOMIC; + struct mv_cesa_ahash_dma_req *ahashdreq = &creq->req.dma; + struct mv_cesa_tdma_req *dreq = &ahashdreq->base; + struct mv_cesa_tdma_chain chain; + struct mv_cesa_ahash_dma_iter iter; + struct mv_cesa_op_ctx *op = NULL; + int ret; + + dreq->chain.first = NULL; + dreq->chain.last = NULL; + + if (creq->src_nents) { + ret = dma_map_sg(cesa_dev->dev, req->src, creq->src_nents, + DMA_TO_DEVICE); + if (!ret) { + ret = -ENOMEM; + goto err; + } + } + + mv_cesa_tdma_desc_iter_init(&chain); + mv_cesa_ahash_req_iter_init(&iter, req); + + op = mv_cesa_ahash_dma_add_cache(&chain, &iter, + creq, flags); + if (IS_ERR(op)) { + ret = PTR_ERR(op); + goto err_free_tdma; + } + + do { + if (!iter.base.op_len) + break; + + op = mv_cesa_ahash_dma_add_data(&chain, &iter, + creq, flags); + if (IS_ERR(op)) { + ret = PTR_ERR(op); + goto err_free_tdma; + } + } while (mv_cesa_ahash_req_iter_next_op(&iter)); + + op = mv_cesa_ahash_dma_last_req(&chain, &iter, creq, op, flags); + if (IS_ERR(op)) { + ret = PTR_ERR(op); + goto err_free_tdma; + } + + if (op) { + /* Add dummy desc to wait for crypto operation end */ + ret = mv_cesa_dma_add_dummy_end(&chain, flags); + if (ret) + goto err_free_tdma; + } + + if (!creq->last_req) + creq->cache_ptr = req->nbytes + creq->cache_ptr - + iter.base.len; + else + creq->cache_ptr = 0; + + dreq->chain = chain; + + return 0; + +err_free_tdma: + mv_cesa_dma_cleanup(dreq); + dma_unmap_sg(cesa_dev->dev, req->src, creq->src_nents, DMA_TO_DEVICE); + +err: + mv_cesa_ahash_last_cleanup(req); + + return ret; +} + static int mv_cesa_ahash_req_init(struct ahash_request *req, bool *cached) { struct mv_cesa_ahash_req *creq = ahash_request_ctx(req); + int ret; + + if (cesa_dev->caps->has_tdma) + creq->req.base.type = CESA_DMA_REQ; + else + creq->req.base.type = CESA_STD_REQ; - creq->req.base.type = CESA_STD_REQ; creq->src_nents = sg_nents_for_len(req->src, req->nbytes); - return mv_cesa_ahash_cache_req(req, cached); + ret = mv_cesa_ahash_cache_req(req, cached); + if (ret) + return ret; + + if (*cached) + return 0; + + if (creq->req.base.type == CESA_DMA_REQ) + ret = mv_cesa_ahash_dma_req_init(req); + + return ret; } static int mv_cesa_ahash_update(struct ahash_request *req) @@ -349,7 +729,13 @@ static int mv_cesa_ahash_update(struct ahash_request *req) if (cached) return 0; - return mv_cesa_queue_req(&req->base); + ret = mv_cesa_queue_req(&req->base); + if (ret && ret != -EINPROGRESS) { + mv_cesa_ahash_cleanup(req); + return ret; + } + + return ret; } static int mv_cesa_ahash_final(struct ahash_request *req) @@ -370,7 +756,11 @@ static int mv_cesa_ahash_final(struct ahash_request *req) if (cached) return 0; - return mv_cesa_queue_req(&req->base); + ret = mv_cesa_queue_req(&req->base); + if (ret && ret != -EINPROGRESS) + mv_cesa_ahash_cleanup(req); + + return ret; } static int mv_cesa_ahash_finup(struct ahash_request *req) @@ -391,7 +781,11 @@ static int mv_cesa_ahash_finup(struct ahash_request *req) if (cached) return 0; - return mv_cesa_queue_req(&req->base); + ret = mv_cesa_queue_req(&req->base); + if (ret && ret != -EINPROGRESS) + mv_cesa_ahash_cleanup(req); + + return ret; } static int mv_cesa_sha1_init(struct ahash_request *req) |