1/* SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause) */
2/*
3 * Copyright 2015-2016 Freescale Semiconductor, Inc.
4 * Copyright 2017 NXP
5 */
6
7#ifndef _SG_SW_QM2_H_
8#define _SG_SW_QM2_H_
9
10#include <soc/fsl/dpaa2-fd.h>
11
12static inline void dma_to_qm_sg_one(struct dpaa2_sg_entry *qm_sg_ptr,
13 dma_addr_t dma, u32 len, u16 offset)
14{
15 dpaa2_sg_set_addr(sg: qm_sg_ptr, addr: dma);
16 dpaa2_sg_set_format(sg: qm_sg_ptr, format: dpaa2_sg_single);
17 dpaa2_sg_set_final(sg: qm_sg_ptr, final: false);
18 dpaa2_sg_set_len(sg: qm_sg_ptr, len);
19 dpaa2_sg_set_bpid(sg: qm_sg_ptr, bpid: 0);
20 dpaa2_sg_set_offset(sg: qm_sg_ptr, offset);
21}
22
23/*
24 * convert scatterlist to h/w link table format
25 * but does not have final bit; instead, returns last entry
26 */
27static inline struct dpaa2_sg_entry *
28sg_to_qm_sg(struct scatterlist *sg, int len,
29 struct dpaa2_sg_entry *qm_sg_ptr, u16 offset)
30{
31 int ent_len;
32
33 while (len) {
34 ent_len = min_t(int, sg_dma_len(sg), len);
35
36 dma_to_qm_sg_one(qm_sg_ptr, sg_dma_address(sg), len: ent_len,
37 offset);
38 qm_sg_ptr++;
39 sg = sg_next(sg);
40 len -= ent_len;
41 }
42 return qm_sg_ptr - 1;
43}
44
45/*
46 * convert scatterlist to h/w link table format
47 * scatterlist must have been previously dma mapped
48 */
49static inline void sg_to_qm_sg_last(struct scatterlist *sg, int len,
50 struct dpaa2_sg_entry *qm_sg_ptr,
51 u16 offset)
52{
53 qm_sg_ptr = sg_to_qm_sg(sg, len, qm_sg_ptr, offset);
54 dpaa2_sg_set_final(sg: qm_sg_ptr, final: true);
55}
56
57#endif /* _SG_SW_QM2_H_ */
58

source code of linux/drivers/crypto/caam/sg_sw_qm2.h