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/*
* 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);
}
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