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 */
dma_to_sec4_sg_one(struct sec4_sg_entry * sec4_sg_ptr,dma_addr_t dma,u32 len,u16 offset)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
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 *
sg_to_sec4_sg(struct scatterlist * sg,int len,struct sec4_sg_entry * sec4_sg_ptr,u16 offset)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), 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
sg_to_sec4_set_last(struct sec4_sg_entry * sec4_sg_ptr)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((struct dpaa2_sg_entry *)sec4_sg_ptr, 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 */
sg_to_sec4_sg_last(struct scatterlist * sg,int len,struct sec4_sg_entry * sec4_sg_ptr,u16 offset)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