1/* SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause) */
2/*
3 * Copyright 2013-2016 Freescale Semiconductor, Inc.
4 * Copyright 2016-2017 NXP
5 */
6
7#ifndef __SG_SW_QM_H
8#define __SG_SW_QM_H
9
10#include <soc/fsl/qman.h>
11#include "regs.h"
12
13static inline void __dma_to_qm_sg(struct qm_sg_entry *qm_sg_ptr, dma_addr_t dma,
14 u16 offset)
15{
16 qm_sg_entry_set64(sg: qm_sg_ptr, addr: dma);
17 qm_sg_ptr->__reserved2 = 0;
18 qm_sg_ptr->bpid = 0;
19 qm_sg_ptr->offset = cpu_to_be16(offset & QM_SG_OFF_MASK);
20}
21
22static inline void dma_to_qm_sg_one(struct qm_sg_entry *qm_sg_ptr,
23 dma_addr_t dma, u32 len, u16 offset)
24{
25 __dma_to_qm_sg(qm_sg_ptr, dma, offset);
26 qm_sg_entry_set_len(sg: qm_sg_ptr, len);
27}
28
29static inline void dma_to_qm_sg_one_last(struct qm_sg_entry *qm_sg_ptr,
30 dma_addr_t dma, u32 len, u16 offset)
31{
32 __dma_to_qm_sg(qm_sg_ptr, dma, offset);
33 qm_sg_entry_set_f(sg: qm_sg_ptr, len);
34}
35
36static inline void dma_to_qm_sg_one_ext(struct qm_sg_entry *qm_sg_ptr,
37 dma_addr_t dma, u32 len, u16 offset)
38{
39 __dma_to_qm_sg(qm_sg_ptr, dma, offset);
40 qm_sg_ptr->cfg = cpu_to_be32(QM_SG_EXT | (len & QM_SG_LEN_MASK));
41}
42
43static inline void dma_to_qm_sg_one_last_ext(struct qm_sg_entry *qm_sg_ptr,
44 dma_addr_t dma, u32 len,
45 u16 offset)
46{
47 __dma_to_qm_sg(qm_sg_ptr, dma, offset);
48 qm_sg_ptr->cfg = cpu_to_be32(QM_SG_EXT | QM_SG_FIN |
49 (len & QM_SG_LEN_MASK));
50}
51
52/*
53 * convert scatterlist to h/w link table format
54 * but does not have final bit; instead, returns last entry
55 */
56static inline struct qm_sg_entry *
57sg_to_qm_sg(struct scatterlist *sg, int len,
58 struct qm_sg_entry *qm_sg_ptr, u16 offset)
59{
60 int ent_len;
61
62 while (len) {
63 ent_len = min_t(int, sg_dma_len(sg), len);
64
65 dma_to_qm_sg_one(qm_sg_ptr, sg_dma_address(sg), len: ent_len,
66 offset);
67 qm_sg_ptr++;
68 sg = sg_next(sg);
69 len -= ent_len;
70 }
71 return qm_sg_ptr - 1;
72}
73
74/*
75 * convert scatterlist to h/w link table format
76 * scatterlist must have been previously dma mapped
77 */
78static inline void sg_to_qm_sg_last(struct scatterlist *sg, int len,
79 struct qm_sg_entry *qm_sg_ptr, u16 offset)
80{
81 qm_sg_ptr = sg_to_qm_sg(sg, len, qm_sg_ptr, offset);
82 qm_sg_entry_set_f(sg: qm_sg_ptr, len: qm_sg_entry_get_len(sg: qm_sg_ptr));
83}
84
85#endif /* __SG_SW_QM_H */
86

source code of linux/drivers/crypto/caam/sg_sw_qm.h