From 5588d039b5ea35760ffc94a50ed3aa2027aec11d Mon Sep 17 00:00:00 2001 From: Russell King Date: Mon, 8 Aug 2016 18:05:08 +0100 Subject: crypto: caam - add ahash_edesc_alloc() for descriptor allocation Add a helper function to perform the descriptor allocation. Signed-off-by: Russell King Signed-off-by: Herbert Xu --- drivers/crypto/caam/caamhash.c | 60 +++++++++++++++++++++++------------------- 1 file changed, 33 insertions(+), 27 deletions(-) (limited to 'drivers/crypto/caam/caamhash.c') diff --git a/drivers/crypto/caam/caamhash.c b/drivers/crypto/caam/caamhash.c index de2224382d9c..ef332c723f0b 100644 --- a/drivers/crypto/caam/caamhash.c +++ b/drivers/crypto/caam/caamhash.c @@ -765,6 +765,25 @@ static void ahash_done_ctx_dst(struct device *jrdev, u32 *desc, u32 err, req->base.complete(&req->base, err); } +/* + * Allocate an enhanced descriptor, which contains the hardware descriptor + * and space for hardware scatter table containing sg_num entries. + */ +static struct ahash_edesc *ahash_edesc_alloc(struct caam_hash_ctx *ctx, + int sg_num, gfp_t flags) +{ + struct ahash_edesc *edesc; + unsigned int sg_size = sg_num * sizeof(struct sec4_sg_entry); + + edesc = kzalloc(sizeof(*edesc) + sg_size, GFP_DMA | flags); + if (!edesc) { + dev_err(ctx->jrdev, "could not allocate extended descriptor\n"); + return NULL; + } + + return edesc; +} + /* submit update job descriptor */ static int ahash_update_ctx(struct ahash_request *req) { @@ -818,11 +837,9 @@ static int ahash_update_ctx(struct ahash_request *req) * allocate space for base edesc and hw desc commands, * link tables */ - edesc = kzalloc(sizeof(*edesc) + sec4_sg_bytes, - GFP_DMA | flags); + edesc = ahash_edesc_alloc(ctx, sec4_sg_src_index + mapped_nents, + flags); if (!edesc) { - dev_err(jrdev, - "could not allocate extended descriptor\n"); dma_unmap_sg(jrdev, req->src, src_nents, DMA_TO_DEVICE); return -ENOMEM; } @@ -931,11 +948,9 @@ static int ahash_final_ctx(struct ahash_request *req) sec4_sg_bytes = sec4_sg_src_index * sizeof(struct sec4_sg_entry); /* allocate space for base edesc and hw desc commands, link tables */ - edesc = kzalloc(sizeof(*edesc) + sec4_sg_bytes, GFP_DMA | flags); - if (!edesc) { - dev_err(jrdev, "could not allocate extended descriptor\n"); + edesc = ahash_edesc_alloc(ctx, sec4_sg_src_index, flags); + if (!edesc) return -ENOMEM; - } sh_len = desc_len(sh_desc); desc = edesc->hw_desc; @@ -1034,9 +1049,9 @@ static int ahash_finup_ctx(struct ahash_request *req) sizeof(struct sec4_sg_entry); /* allocate space for base edesc and hw desc commands, link tables */ - edesc = kzalloc(sizeof(*edesc) + sec4_sg_bytes, GFP_DMA | flags); + edesc = ahash_edesc_alloc(ctx, sec4_sg_src_index + mapped_nents, + flags); if (!edesc) { - dev_err(jrdev, "could not allocate extended descriptor\n"); dma_unmap_sg(jrdev, req->src, src_nents, DMA_TO_DEVICE); return -ENOMEM; } @@ -1136,9 +1151,9 @@ static int ahash_digest(struct ahash_request *req) sec4_sg_bytes = 0; /* allocate space for base edesc and hw desc commands, link tables */ - edesc = kzalloc(sizeof(*edesc) + sec4_sg_bytes, GFP_DMA | flags); + edesc = ahash_edesc_alloc(ctx, mapped_nents > 1 ? mapped_nents : 0, + flags); if (!edesc) { - dev_err(jrdev, "could not allocate extended descriptor\n"); dma_unmap_sg(jrdev, req->src, src_nents, DMA_TO_DEVICE); return -ENOMEM; } @@ -1212,13 +1227,10 @@ static int ahash_final_no_ctx(struct ahash_request *req) int sh_len; /* allocate space for base edesc and hw desc commands, link tables */ - edesc = kzalloc(sizeof(*edesc), GFP_DMA | flags); - if (!edesc) { - dev_err(jrdev, "could not allocate extended descriptor\n"); + edesc = ahash_edesc_alloc(ctx, 0, flags); + if (!edesc) return -ENOMEM; - } - edesc->sec4_sg_bytes = 0; sh_len = desc_len(sh_desc); desc = edesc->hw_desc; init_job_desc_shared(desc, ptr, sh_len, HDR_SHARE_DEFER | HDR_REVERSE); @@ -1310,11 +1322,8 @@ static int ahash_update_no_ctx(struct ahash_request *req) * allocate space for base edesc and hw desc commands, * link tables */ - edesc = kzalloc(sizeof(*edesc) + sec4_sg_bytes, - GFP_DMA | flags); + edesc = ahash_edesc_alloc(ctx, 1 + mapped_nents, flags); if (!edesc) { - dev_err(jrdev, - "could not allocate extended descriptor\n"); dma_unmap_sg(jrdev, req->src, src_nents, DMA_TO_DEVICE); return -ENOMEM; } @@ -1435,9 +1444,8 @@ static int ahash_finup_no_ctx(struct ahash_request *req) sizeof(struct sec4_sg_entry); /* allocate space for base edesc and hw desc commands, link tables */ - edesc = kzalloc(sizeof(*edesc) + sec4_sg_bytes, GFP_DMA | flags); + edesc = ahash_edesc_alloc(ctx, sec4_sg_src_index + mapped_nents, flags); if (!edesc) { - dev_err(jrdev, "could not allocate extended descriptor\n"); dma_unmap_sg(jrdev, req->src, src_nents, DMA_TO_DEVICE); return -ENOMEM; } @@ -1546,11 +1554,9 @@ static int ahash_update_first(struct ahash_request *req) * allocate space for base edesc and hw desc commands, * link tables */ - edesc = kzalloc(sizeof(*edesc) + sec4_sg_bytes, - GFP_DMA | flags); + edesc = ahash_edesc_alloc(ctx, mapped_nents > 1 ? + mapped_nents : 0, flags); if (!edesc) { - dev_err(jrdev, - "could not allocate extended descriptor\n"); dma_unmap_sg(jrdev, req->src, src_nents, DMA_TO_DEVICE); return -ENOMEM; } -- cgit v1.2.3