[linux-2.6-block.git] / drivers / crypto / caam / sg_sw_sec4.h

/*
 * CAAM/SEC 4.x functions for using scatterlists in caam driver
 *
 * Copyright 2008-2011 Freescale Semiconductor, Inc.
 *
 */

#include "regs.h"

struct sec4_sg_entry {
	u64 ptr;
	u32 len;
	u32 bpid_offset;
};

/*
 * convert single dma address to h/w link table format
 */
static inline void dma_to_sec4_sg_one(struct sec4_sg_entry *sec4_sg_ptr,
				      dma_addr_t dma, u32 len, u16 offset)
{
	sec4_sg_ptr->ptr = cpu_to_caam_dma64(dma);
	sec4_sg_ptr->len = cpu_to_caam32(len);
	sec4_sg_ptr->bpid_offset = cpu_to_caam32(offset & SEC4_SG_OFFSET_MASK);
#ifdef DEBUG
	print_hex_dump(KERN_ERR, "sec4_sg_ptr@: ",
		       DUMP_PREFIX_ADDRESS, 16, 4, sec4_sg_ptr,
		       sizeof(struct sec4_sg_entry), 1);
#endif
}

/*
 * convert scatterlist to h/w link table format
 * but does not have final bit; instead, returns last entry
 */
static inline struct sec4_sg_entry *
sg_to_sec4_sg(struct scatterlist *sg, int sg_count,
	      struct sec4_sg_entry *sec4_sg_ptr, u16 offset)
{
	while (sg_count) {
		dma_to_sec4_sg_one(sec4_sg_ptr, sg_dma_address(sg),
				   sg_dma_len(sg), offset);
		sec4_sg_ptr++;
		sg = sg_next(sg);
		sg_count--;
	}
	return sec4_sg_ptr - 1;
}

/*
 * convert scatterlist to h/w link table format
 * scatterlist must have been previously dma mapped
 */
static inline void sg_to_sec4_sg_last(struct scatterlist *sg, int sg_count,
				      struct sec4_sg_entry *sec4_sg_ptr,
				      u16 offset)
{
	sec4_sg_ptr = sg_to_sec4_sg(sg, sg_count, sec4_sg_ptr, offset);
	sec4_sg_ptr->len |= cpu_to_caam32(SEC4_SG_LEN_FIN);
}
Commit	Line	Data
	1	/*
	2	* CAAM/SEC 4.x functions for using scatterlists in caam driver
	3	*
	4	* Copyright 2008-2011 Freescale Semiconductor, Inc.
	5	*
	6	*/
	7
	8	#include "regs.h"
	9
	10	struct sec4_sg_entry {
	11	u64 ptr;
	12	u32 len;
	13	u32 bpid_offset;
	14	};
	15
	16	/*
	17	* convert single dma address to h/w link table format
	18	*/
	19	static inline void dma_to_sec4_sg_one(struct sec4_sg_entry *sec4_sg_ptr,
	20	dma_addr_t dma, u32 len, u16 offset)
	21	{
	22	sec4_sg_ptr->ptr = cpu_to_caam_dma64(dma);
	23	sec4_sg_ptr->len = cpu_to_caam32(len);
	24	sec4_sg_ptr->bpid_offset = cpu_to_caam32(offset & SEC4_SG_OFFSET_MASK);
	25	#ifdef DEBUG
	26	print_hex_dump(KERN_ERR, "sec4_sg_ptr@: ",
	27	DUMP_PREFIX_ADDRESS, 16, 4, sec4_sg_ptr,
	28	sizeof(struct sec4_sg_entry), 1);
	29	#endif
	30	}
	31
	32	/*
	33	* convert scatterlist to h/w link table format
	34	* but does not have final bit; instead, returns last entry
	35	*/
	36	static inline struct sec4_sg_entry *
	37	sg_to_sec4_sg(struct scatterlist *sg, int sg_count,
	38	struct sec4_sg_entry *sec4_sg_ptr, u16 offset)
	39	{
	40	while (sg_count) {
	41	dma_to_sec4_sg_one(sec4_sg_ptr, sg_dma_address(sg),
	42	sg_dma_len(sg), offset);
	43	sec4_sg_ptr++;
	44	sg = sg_next(sg);
	45	sg_count--;
	46	}
	47	return sec4_sg_ptr - 1;
	48	}
	49
	50	/*
	51	* convert scatterlist to h/w link table format
	52	* scatterlist must have been previously dma mapped
	53	*/
	54	static inline void sg_to_sec4_sg_last(struct scatterlist *sg, int sg_count,
	55	struct sec4_sg_entry *sec4_sg_ptr,
	56	u16 offset)
	57	{
	58	sec4_sg_ptr = sg_to_sec4_sg(sg, sg_count, sec4_sg_ptr, offset);
	59	sec4_sg_ptr->len \|= cpu_to_caam32(SEC4_SG_LEN_FIN);
	60	}