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618b5dc4 | 1 | /* SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause) */ |
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2 | /* |
3 | * Copyright 2015-2016 Freescale Semiconductor, Inc. | |
4 | * Copyright 2017 NXP | |
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5 | */ |
6 | ||
7 | #ifndef _SG_SW_QM2_H_ | |
8 | #define _SG_SW_QM2_H_ | |
9 | ||
c89105c9 | 10 | #include <soc/fsl/dpaa2-fd.h> |
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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(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 * | |
059d73ee | 28 | sg_to_qm_sg(struct scatterlist *sg, int len, |
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29 | struct dpaa2_sg_entry *qm_sg_ptr, u16 offset) |
30 | { | |
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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); | |
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38 | qm_sg_ptr++; |
39 | sg = sg_next(sg); | |
059d73ee | 40 | len -= ent_len; |
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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 | */ | |
059d73ee | 49 | static inline void sg_to_qm_sg_last(struct scatterlist *sg, int len, |
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50 | struct dpaa2_sg_entry *qm_sg_ptr, |
51 | u16 offset) | |
52 | { | |
059d73ee | 53 | qm_sg_ptr = sg_to_qm_sg(sg, len, qm_sg_ptr, offset); |
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54 | dpaa2_sg_set_final(qm_sg_ptr, true); |
55 | } | |
56 | ||
57 | #endif /* _SG_SW_QM2_H_ */ |