1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | /* |
3 | * CAAM/SEC 4.x functions for using scatterlists in caam driver |
4 | * |
5 | * Copyright 2008-2011 Freescale Semiconductor, Inc. |
6 | * |
7 | */ |
8 | |
9 | #ifndef _SG_SW_SEC4_H_ |
10 | #define _SG_SW_SEC4_H_ |
11 | |
12 | #include "ctrl.h" |
13 | #include "regs.h" |
14 | #include "sg_sw_qm2.h" |
15 | #include <soc/fsl/dpaa2-fd.h> |
16 | |
17 | struct sec4_sg_entry { |
18 | u64 ptr; |
19 | u32 len; |
20 | u32 bpid_offset; |
21 | }; |
22 | |
23 | /* |
24 | * convert single dma address to h/w link table format |
25 | */ |
26 | static inline void dma_to_sec4_sg_one(struct sec4_sg_entry *sec4_sg_ptr, |
27 | dma_addr_t dma, u32 len, u16 offset) |
28 | { |
29 | if (caam_dpaa2) { |
30 | dma_to_qm_sg_one(qm_sg_ptr: (struct dpaa2_sg_entry *)sec4_sg_ptr, dma, len, |
31 | offset); |
32 | } else { |
33 | sec4_sg_ptr->ptr = cpu_to_caam_dma64(value: dma); |
34 | sec4_sg_ptr->len = cpu_to_caam32(val: len); |
35 | sec4_sg_ptr->bpid_offset = cpu_to_caam32(val: offset & |
36 | SEC4_SG_OFFSET_MASK); |
37 | } |
38 | |
39 | print_hex_dump_debug("sec4_sg_ptr@: " , DUMP_PREFIX_ADDRESS, 16, 4, |
40 | sec4_sg_ptr, sizeof(struct sec4_sg_entry), 1); |
41 | } |
42 | |
43 | /* |
44 | * convert scatterlist to h/w link table format |
45 | * but does not have final bit; instead, returns last entry |
46 | */ |
47 | static inline struct sec4_sg_entry * |
48 | sg_to_sec4_sg(struct scatterlist *sg, int len, |
49 | struct sec4_sg_entry *sec4_sg_ptr, u16 offset) |
50 | { |
51 | int ent_len; |
52 | |
53 | while (len) { |
54 | ent_len = min_t(int, sg_dma_len(sg), len); |
55 | |
56 | dma_to_sec4_sg_one(sec4_sg_ptr, sg_dma_address(sg), len: ent_len, |
57 | offset); |
58 | sec4_sg_ptr++; |
59 | sg = sg_next(sg); |
60 | len -= ent_len; |
61 | } |
62 | return sec4_sg_ptr - 1; |
63 | } |
64 | |
65 | static inline void sg_to_sec4_set_last(struct sec4_sg_entry *sec4_sg_ptr) |
66 | { |
67 | if (caam_dpaa2) |
68 | dpaa2_sg_set_final(sg: (struct dpaa2_sg_entry *)sec4_sg_ptr, final: true); |
69 | else |
70 | sec4_sg_ptr->len |= cpu_to_caam32(SEC4_SG_LEN_FIN); |
71 | } |
72 | |
73 | /* |
74 | * convert scatterlist to h/w link table format |
75 | * scatterlist must have been previously dma mapped |
76 | */ |
77 | static inline void sg_to_sec4_sg_last(struct scatterlist *sg, int len, |
78 | struct sec4_sg_entry *sec4_sg_ptr, |
79 | u16 offset) |
80 | { |
81 | sec4_sg_ptr = sg_to_sec4_sg(sg, len, sec4_sg_ptr, offset); |
82 | sg_to_sec4_set_last(sec4_sg_ptr); |
83 | } |
84 | |
85 | #endif /* _SG_SW_SEC4_H_ */ |
86 | |