1/*-
2 * Copyright (c) 2023 Bjoern A. Zeeb
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. 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 *
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
23 * SUCH DAMAGE.
24 */
25
26#ifndef	_LINUXKPI_NET_PAGE_POOL_H
27#define	_LINUXKPI_NET_PAGE_POOL_H
28
29#include <linux/kernel.h>	/* pr_debug */
30#include <linux/types.h>
31#include <linux/dma-mapping.h>
32
33struct device;
34
35struct page_pool_params {
36	struct device			*dev;
37	uint32_t			flags;
38	uint32_t			order;
39	uint32_t			pool_size;
40	uint32_t			max_len;
41	uint32_t			offset;
42	int				nid;		/* NUMA */
43	enum dma_data_direction		dma_dir;
44};
45
46struct page_pool {
47};
48
49#define	PP_FLAG_DMA_MAP		BIT(0)
50#define	PP_FLAG_DMA_SYNC_DEV	BIT(1)
51#define	PP_FLAG_PAGE_FRAG	BIT(2)
52
53static inline struct page_pool *
54page_pool_create(const struct page_pool_params *ppparams)
55{
56
57	pr_debug("%s: TODO\n", __func__);
58	return (NULL);
59}
60
61static inline void
62page_pool_destroy(struct page_pool *ppool)
63{
64
65	pr_debug("%s: TODO\n", __func__);
66}
67
68static inline struct page *
69page_pool_dev_alloc_frag(struct page_pool *ppool, uint32_t *offset,
70    size_t size)
71{
72
73	pr_debug("%s: TODO\n", __func__);
74	return (NULL);
75}
76
77static inline dma_addr_t
78page_pool_get_dma_addr(struct page *page)
79{
80
81	pr_debug("%s: TODO\n", __func__);
82	return (0);
83}
84
85static inline enum dma_data_direction
86page_pool_get_dma_dir(const struct page_pool *ppool)
87{
88
89	pr_debug("%s: TODO\n", __func__);
90	return (DMA_BIDIRECTIONAL);
91}
92
93static inline void
94page_pool_put_full_page(struct page_pool *ppool, struct page *page,
95    bool allow_direct)
96{
97
98	pr_debug("%s: TODO\n", __func__);
99}
100
101static inline int
102page_pool_ethtool_stats_get_count(void)
103{
104
105	pr_debug("%s: TODO\n", __func__);
106	return (0);
107}
108
109static inline uint8_t *
110page_pool_ethtool_stats_get_strings(uint8_t *x)
111{
112
113	pr_debug("%s: TODO\n", __func__);
114	return (x);
115}
116
117#endif	/* _LINUXKPI_NET_PAGE_POOL_H */
118