Commit | Line | Data |
---|---|---|
4c1ec1f9 YK |
1 | /* |
2 | * CAAM/SEC 4.x functions for using scatterlists in caam driver | |
3 | * | |
4 | * Copyright 2008-2011 Freescale Semiconductor, Inc. | |
5 | * | |
6 | */ | |
7 | ||
a299c837 | 8 | struct sec4_sg_entry; |
4c1ec1f9 YK |
9 | |
10 | /* | |
11 | * convert single dma address to h/w link table format | |
12 | */ | |
a299c837 | 13 | static inline void dma_to_sec4_sg_one(struct sec4_sg_entry *sec4_sg_ptr, |
4c1ec1f9 YK |
14 | dma_addr_t dma, u32 len, u32 offset) |
15 | { | |
a299c837 YK |
16 | sec4_sg_ptr->ptr = dma; |
17 | sec4_sg_ptr->len = len; | |
a299c837 YK |
18 | sec4_sg_ptr->buf_pool_id = 0; |
19 | sec4_sg_ptr->offset = offset; | |
4c1ec1f9 | 20 | #ifdef DEBUG |
a299c837 YK |
21 | print_hex_dump(KERN_ERR, "sec4_sg_ptr@: ", |
22 | DUMP_PREFIX_ADDRESS, 16, 4, sec4_sg_ptr, | |
23 | sizeof(struct sec4_sg_entry), 1); | |
4c1ec1f9 YK |
24 | #endif |
25 | } | |
26 | ||
27 | /* | |
28 | * convert scatterlist to h/w link table format | |
29 | * but does not have final bit; instead, returns last entry | |
30 | */ | |
a299c837 YK |
31 | static inline struct sec4_sg_entry * |
32 | sg_to_sec4_sg(struct scatterlist *sg, int sg_count, | |
33 | struct sec4_sg_entry *sec4_sg_ptr, u32 offset) | |
4c1ec1f9 YK |
34 | { |
35 | while (sg_count) { | |
a299c837 | 36 | dma_to_sec4_sg_one(sec4_sg_ptr, sg_dma_address(sg), |
4c1ec1f9 | 37 | sg_dma_len(sg), offset); |
a299c837 | 38 | sec4_sg_ptr++; |
5be4d4c9 | 39 | sg = sg_next(sg); |
4c1ec1f9 YK |
40 | sg_count--; |
41 | } | |
a299c837 | 42 | return sec4_sg_ptr - 1; |
4c1ec1f9 YK |
43 | } |
44 | ||
45 | /* | |
46 | * convert scatterlist to h/w link table format | |
47 | * scatterlist must have been previously dma mapped | |
48 | */ | |
a299c837 YK |
49 | static inline void sg_to_sec4_sg_last(struct scatterlist *sg, int sg_count, |
50 | struct sec4_sg_entry *sec4_sg_ptr, | |
51 | u32 offset) | |
4c1ec1f9 | 52 | { |
a299c837 YK |
53 | sec4_sg_ptr = sg_to_sec4_sg(sg, sg_count, sec4_sg_ptr, offset); |
54 | sec4_sg_ptr->len |= SEC4_SG_LEN_FIN; | |
4c1ec1f9 YK |
55 | } |
56 | ||
70c3c8a9 HX |
57 | static inline struct sec4_sg_entry *sg_to_sec4_sg_len( |
58 | struct scatterlist *sg, unsigned int total, | |
59 | struct sec4_sg_entry *sec4_sg_ptr) | |
60 | { | |
61 | do { | |
62 | unsigned int len = min(sg_dma_len(sg), total); | |
63 | ||
64 | dma_to_sec4_sg_one(sec4_sg_ptr, sg_dma_address(sg), len, 0); | |
65 | sec4_sg_ptr++; | |
66 | sg = sg_next(sg); | |
67 | total -= len; | |
68 | } while (total); | |
69 | return sec4_sg_ptr - 1; | |
70 | } | |
71 | ||
4c1ec1f9 | 72 | /* derive number of elements in scatterlist, but return 0 for 1 */ |
13fb8fd7 | 73 | static inline int sg_count(struct scatterlist *sg_list, int nbytes) |
4c1ec1f9 | 74 | { |
13fb8fd7 | 75 | int sg_nents = sg_nents_for_len(sg_list, nbytes); |
4c1ec1f9 YK |
76 | |
77 | if (likely(sg_nents == 1)) | |
78 | return 0; | |
79 | ||
80 | return sg_nents; | |
81 | } |