1*4882a593Smuzhiyun /* SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause) */
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Copyright 2015-2016 Freescale Semiconductor, Inc.
4*4882a593Smuzhiyun * Copyright 2017 NXP
5*4882a593Smuzhiyun */
6*4882a593Smuzhiyun
7*4882a593Smuzhiyun #ifndef _SG_SW_QM2_H_
8*4882a593Smuzhiyun #define _SG_SW_QM2_H_
9*4882a593Smuzhiyun
10*4882a593Smuzhiyun #include <soc/fsl/dpaa2-fd.h>
11*4882a593Smuzhiyun
dma_to_qm_sg_one(struct dpaa2_sg_entry * qm_sg_ptr,dma_addr_t dma,u32 len,u16 offset)12*4882a593Smuzhiyun static inline void dma_to_qm_sg_one(struct dpaa2_sg_entry *qm_sg_ptr,
13*4882a593Smuzhiyun dma_addr_t dma, u32 len, u16 offset)
14*4882a593Smuzhiyun {
15*4882a593Smuzhiyun dpaa2_sg_set_addr(qm_sg_ptr, dma);
16*4882a593Smuzhiyun dpaa2_sg_set_format(qm_sg_ptr, dpaa2_sg_single);
17*4882a593Smuzhiyun dpaa2_sg_set_final(qm_sg_ptr, false);
18*4882a593Smuzhiyun dpaa2_sg_set_len(qm_sg_ptr, len);
19*4882a593Smuzhiyun dpaa2_sg_set_bpid(qm_sg_ptr, 0);
20*4882a593Smuzhiyun dpaa2_sg_set_offset(qm_sg_ptr, offset);
21*4882a593Smuzhiyun }
22*4882a593Smuzhiyun
23*4882a593Smuzhiyun /*
24*4882a593Smuzhiyun * convert scatterlist to h/w link table format
25*4882a593Smuzhiyun * but does not have final bit; instead, returns last entry
26*4882a593Smuzhiyun */
27*4882a593Smuzhiyun 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*4882a593Smuzhiyun sg_to_qm_sg(struct scatterlist *sg, int len,
29*4882a593Smuzhiyun struct dpaa2_sg_entry *qm_sg_ptr, u16 offset)
30*4882a593Smuzhiyun {
31*4882a593Smuzhiyun int ent_len;
32*4882a593Smuzhiyun
33*4882a593Smuzhiyun while (len) {
34*4882a593Smuzhiyun ent_len = min_t(int, sg_dma_len(sg), len);
35*4882a593Smuzhiyun
36*4882a593Smuzhiyun dma_to_qm_sg_one(qm_sg_ptr, sg_dma_address(sg), ent_len,
37*4882a593Smuzhiyun offset);
38*4882a593Smuzhiyun qm_sg_ptr++;
39*4882a593Smuzhiyun sg = sg_next(sg);
40*4882a593Smuzhiyun len -= ent_len;
41*4882a593Smuzhiyun }
42*4882a593Smuzhiyun return qm_sg_ptr - 1;
43*4882a593Smuzhiyun }
44*4882a593Smuzhiyun
45*4882a593Smuzhiyun /*
46*4882a593Smuzhiyun * convert scatterlist to h/w link table format
47*4882a593Smuzhiyun * scatterlist must have been previously dma mapped
48*4882a593Smuzhiyun */
sg_to_qm_sg_last(struct scatterlist * sg,int len,struct dpaa2_sg_entry * qm_sg_ptr,u16 offset)49*4882a593Smuzhiyun static inline void sg_to_qm_sg_last(struct scatterlist *sg, int len,
50*4882a593Smuzhiyun struct dpaa2_sg_entry *qm_sg_ptr,
51*4882a593Smuzhiyun u16 offset)
52*4882a593Smuzhiyun {
53*4882a593Smuzhiyun qm_sg_ptr = sg_to_qm_sg(sg, len, qm_sg_ptr, offset);
54*4882a593Smuzhiyun dpaa2_sg_set_final(qm_sg_ptr, true);
55*4882a593Smuzhiyun }
56*4882a593Smuzhiyun
57*4882a593Smuzhiyun #endif /* _SG_SW_QM2_H_ */
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