drivers/crypto/atmel-tdes.c

Source file repositories/reference/linux-study-clean/drivers/crypto/atmel-tdes.c

File Facts

System
Linux kernel
Corpus path
drivers/crypto/atmel-tdes.c
Extension
.c
Size
25700 bytes
Lines
1076
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 atmel_tdes_caps {
	bool	has_dma;
};

struct atmel_tdes_dev;

struct atmel_tdes_ctx {
	struct atmel_tdes_dev *dd;

	int		keylen;
	u32		key[DES3_EDE_KEY_SIZE / sizeof(u32)];
	unsigned long	flags;

	u16		block_size;
};

struct atmel_tdes_reqctx {
	unsigned long mode;
	u8 lastc[DES_BLOCK_SIZE];
};

struct atmel_tdes_dma {
	struct dma_chan			*chan;
	struct dma_slave_config dma_conf;
};

struct atmel_tdes_dev {
	struct list_head	list;
	unsigned long		phys_base;
	void __iomem		*io_base;

	struct atmel_tdes_ctx	*ctx;
	struct device		*dev;
	struct clk			*iclk;
	int					irq;

	unsigned long		flags;

	spinlock_t		lock;
	struct crypto_queue	queue;

	struct tasklet_struct	done_task;
	struct tasklet_struct	queue_task;

	struct skcipher_request	*req;
	size_t				total;

	struct scatterlist	*in_sg;
	unsigned int		nb_in_sg;
	size_t				in_offset;
	struct scatterlist	*out_sg;
	unsigned int		nb_out_sg;
	size_t				out_offset;

	size_t	buflen;
	size_t	dma_size;

	void	*buf_in;
	int		dma_in;
	dma_addr_t	dma_addr_in;
	struct atmel_tdes_dma	dma_lch_in;

	void	*buf_out;
	int		dma_out;
	dma_addr_t	dma_addr_out;
	struct atmel_tdes_dma	dma_lch_out;

	struct atmel_tdes_caps	caps;

	u32	hw_version;
};

struct atmel_tdes_drv {
	struct list_head	dev_list;
	spinlock_t		lock;
};

static struct atmel_tdes_drv atmel_tdes = {
	.dev_list = LIST_HEAD_INIT(atmel_tdes.dev_list),
	.lock = __SPIN_LOCK_UNLOCKED(atmel_tdes.lock),
};

static int atmel_tdes_sg_copy(struct scatterlist **sg, size_t *offset,
			void *buf, size_t buflen, size_t total, int out)
{
	size_t count, off = 0;

	while (buflen && total) {
		count = min((*sg)->length - *offset, total);
		count = min(count, buflen);

Annotation

Implementation Notes