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
dma_to_qm_sg_one(struct dpaa2_sg_entry * qm_sg_ptr,dma_addr_t dma,u32 len,u16 offset)12 static 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(qm_sg_ptr, dma);
16 dpaa2_sg_set_format(qm_sg_ptr, dpaa2_sg_single);
17 dpaa2_sg_set_final(qm_sg_ptr, false);
18 dpaa2_sg_set_len(qm_sg_ptr, len);
19 dpaa2_sg_set_bpid(qm_sg_ptr, 0);
20 dpaa2_sg_set_offset(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 */
27 static inline struct dpaa2_sg_entry *
sg_to_qm_sg(struct scatterlist * sg,int len,struct dpaa2_sg_entry * qm_sg_ptr,u16 offset)28 sg_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), 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 */
sg_to_qm_sg_last(struct scatterlist * sg,int len,struct dpaa2_sg_entry * qm_sg_ptr,u16 offset)49 static 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(qm_sg_ptr, true);
55 }
56
57 #endif /* _SG_SW_QM2_H_ */
58