drivers/crypto/marvell/cesa/hash.c

Source file repositories/reference/linux-study-clean/drivers/crypto/marvell/cesa/hash.c

File Facts

System
Linux kernel
Corpus path
drivers/crypto/marvell/cesa/hash.c
Extension
.c
Size
36640 bytes
Lines
1455
Domain
Driver Families
Bucket
drivers/crypto
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

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 + creq->cache_ptr;

	if (!creq->last_req)
		len &= ~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_dma_req *req, gfp_t flags)
{
	req->cache = dma_pool_alloc(cesa_dev->dma->cache_pool, flags,
				    &req->cache_dma);
	if (!req->cache)
		return -ENOMEM;

	return 0;
}

static inline void
mv_cesa_ahash_dma_free_cache(struct mv_cesa_ahash_dma_req *req)
{
	if (!req->cache)
		return;

	dma_pool_free(cesa_dev->dma->cache_pool, req->cache,
		      req->cache_dma);
}

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_ahash_dma_free_cache(&creq->req.dma);
	mv_cesa_dma_cleanup(&creq->base);
}

static inline void mv_cesa_ahash_cleanup(struct ahash_request *req)

Annotation

Implementation Notes