d/freebsd-dev
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

LinuxKPI: add page pool skeleton

Browse Source 
Add the page pool skeleton based on a wireless driver.  We have to
sort out some struct page problems first before we can start
implementing this but that should happen independent of all other
changes.

MFC after:	10 days
Reviewed by:	emaste
Differential Revision: https://reviews.freebsd.org/D40250
This commit is contained in:
Bjoern A. Zeeb 2023-05-23 23:15:57 +00:00
parent c52b5d16cc
commit 517e0978db
1 changed files with 119 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

119
sys/compat/linuxkpi/common/include/net/page_pool.h Normal file
View File

@ -0,0 +1,119 @@
/*-
* Copyright (c) 2023 Bjoern A. Zeeb
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef _LINUXKPI_NET_PAGE_POOL_H
#define _LINUXKPI_NET_PAGE_POOL_H
#include <linux/kernel.h> /* pr_debug */
#include <linux/types.h>
#include <linux/dma-mapping.h>
struct device;
struct page_pool_params {
struct device *dev;
uint32_t flags;
uint32_t order;
uint32_t pool_size;
uint32_t max_len;
uint32_t offset;
int nid; /* NUMA */
enum dma_data_direction dma_dir;
};
struct page_pool {
};
#define PP_FLAG_DMA_MAP BIT(0)
#define PP_FLAG_DMA_SYNC_DEV BIT(1)
#define PP_FLAG_PAGE_FRAG BIT(2)
static inline struct page_pool *
page_pool_create(const struct page_pool_params *ppparams)
{
pr_debug("%s: TODO\n", __func__);
return (NULL);
}
static inline void
page_pool_destroy(struct page_pool *ppool)
{
pr_debug("%s: TODO\n", __func__);
}
static inline struct page *
page_pool_dev_alloc_frag(struct page_pool *ppool, uint32_t *offset,
size_t size)
{
pr_debug("%s: TODO\n", __func__);
return (NULL);
}
static inline dma_addr_t
page_pool_get_dma_addr(struct page *page)
{
pr_debug("%s: TODO\n", __func__);
return (0);
}
static inline enum dma_data_direction
page_pool_get_dma_dir(const struct page_pool *ppool)
{
pr_debug("%s: TODO\n", __func__);
return (DMA_BIDIRECTIONAL);
}
static inline void
page_pool_put_full_page(struct page_pool *ppool, struct page *page,
bool allow_direct)
{
pr_debug("%s: TODO\n", __func__);
}
static inline int
page_pool_ethtool_stats_get_count(void)
{
pr_debug("%s: TODO\n", __func__);
return (0);
}
static inline uint8_t *
page_pool_ethtool_stats_get_strings(uint8_t *x)
{
pr_debug("%s: TODO\n", __func__);
return (x);
}
#endif /* _LINUXKPI_NET_PAGE_POOL_H */