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 | |
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(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 | */ |
27 | static inline struct dpaa2_sg_entry * |
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), 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 | */ |
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(sg: qm_sg_ptr, final: true); |
55 | } |
56 | |
57 | #endif /* _SG_SW_QM2_H_ */ |
58 | |