tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
1/*
2 * Copyright 2015-2016 Freescale Semiconductor, Inc.
3 * Copyright 2017 NXP
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 * * Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * * Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 * * Neither the names of the above-listed copyright holders nor the
13 * names of any contributors may be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 *
17 * ALTERNATIVELY, this software may be distributed under the terms of the
18 * GNU General Public License ("GPL") as published by the Free Software
19 * Foundation, either version 2 of that License or (at your option) any
20 * later version.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
23 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
26 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
32 * POSSIBILITY OF SUCH DAMAGE.
33 */
34
35#ifndef _SG_SW_QM2_H_
36#define _SG_SW_QM2_H_
37
38#include "../../../drivers/staging/fsl-mc/include/dpaa2-fd.h"
39
40static inline void dma_to_qm_sg_one(struct dpaa2_sg_entry *qm_sg_ptr,
41 dma_addr_t dma, u32 len, u16 offset)
42{
43 dpaa2_sg_set_addr(qm_sg_ptr, dma);
44 dpaa2_sg_set_format(qm_sg_ptr, dpaa2_sg_single);
45 dpaa2_sg_set_final(qm_sg_ptr, false);
46 dpaa2_sg_set_len(qm_sg_ptr, len);
47 dpaa2_sg_set_bpid(qm_sg_ptr, 0);
48 dpaa2_sg_set_offset(qm_sg_ptr, offset);
49}
50
51/*
52 * convert scatterlist to h/w link table format
53 * but does not have final bit; instead, returns last entry
54 */
55static inline struct dpaa2_sg_entry *
56sg_to_qm_sg(struct scatterlist *sg, int sg_count,
57 struct dpaa2_sg_entry *qm_sg_ptr, u16 offset)
58{
59 while (sg_count && sg) {
60 dma_to_qm_sg_one(qm_sg_ptr, sg_dma_address(sg),
61 sg_dma_len(sg), offset);
62 qm_sg_ptr++;
63 sg = sg_next(sg);
64 sg_count--;
65 }
66 return qm_sg_ptr - 1;
67}
68
69/*
70 * convert scatterlist to h/w link table format
71 * scatterlist must have been previously dma mapped
72 */
73static inline void sg_to_qm_sg_last(struct scatterlist *sg, int sg_count,
74 struct dpaa2_sg_entry *qm_sg_ptr,
75 u16 offset)
76{
77 qm_sg_ptr = sg_to_qm_sg(sg, sg_count, qm_sg_ptr, offset);
78 dpaa2_sg_set_final(qm_sg_ptr, true);
79}
80
81#endif /* _SG_SW_QM2_H_ */