GNU Linux-libre 4.19.314-gnu1
[releases.git] / drivers / crypto / caam / sg_sw_sec4.h
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((struct dpaa2_sg_entry *)sec4_sg_ptr, dma, len,
31                                  offset);
32         } else {
33                 sec4_sg_ptr->ptr = cpu_to_caam_dma64(dma);
34                 sec4_sg_ptr->len = cpu_to_caam32(len);
35                 sec4_sg_ptr->bpid_offset = cpu_to_caam32(offset &
36                                                          SEC4_SG_OFFSET_MASK);
37         }
38 #ifdef DEBUG
39         print_hex_dump(KERN_ERR, "sec4_sg_ptr@: ",
40                        DUMP_PREFIX_ADDRESS, 16, 4, sec4_sg_ptr,
41                        sizeof(struct sec4_sg_entry), 1);
42 #endif
43 }
44
45 /*
46  * convert scatterlist to h/w link table format
47  * but does not have final bit; instead, returns last entry
48  */
49 static inline struct sec4_sg_entry *
50 sg_to_sec4_sg(struct scatterlist *sg, int sg_count,
51               struct sec4_sg_entry *sec4_sg_ptr, u16 offset)
52 {
53         while (sg_count) {
54                 dma_to_sec4_sg_one(sec4_sg_ptr, sg_dma_address(sg),
55                                    sg_dma_len(sg), offset);
56                 sec4_sg_ptr++;
57                 sg = sg_next(sg);
58                 sg_count--;
59         }
60         return sec4_sg_ptr - 1;
61 }
62
63 static inline void sg_to_sec4_set_last(struct sec4_sg_entry *sec4_sg_ptr)
64 {
65         if (caam_dpaa2)
66                 dpaa2_sg_set_final((struct dpaa2_sg_entry *)sec4_sg_ptr, true);
67         else
68                 sec4_sg_ptr->len |= cpu_to_caam32(SEC4_SG_LEN_FIN);
69 }
70
71 /*
72  * convert scatterlist to h/w link table format
73  * scatterlist must have been previously dma mapped
74  */
75 static inline void sg_to_sec4_sg_last(struct scatterlist *sg, int sg_count,
76                                       struct sec4_sg_entry *sec4_sg_ptr,
77                                       u16 offset)
78 {
79         sec4_sg_ptr = sg_to_sec4_sg(sg, sg_count, sec4_sg_ptr, offset);
80         sg_to_sec4_set_last(sec4_sg_ptr);
81 }
82
83 #endif /* _SG_SW_SEC4_H_ */