/*
* Copyright (c) 2007 Mellanox Technologies. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* - 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.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
*/
#include <linux/bpf.h>
#include <linux/bpf_trace.h>
#include <linux/mlx4/cq.h>
#include <linux/slab.h>
#include <linux/mlx4/qp.h>
#include <linux/skbuff.h>
#include <linux/rculist.h>
#include <linux/if_ether.h>
#include <linux/if_vlan.h>
#include <linux/vmalloc.h>
#include <linux/irq.h>
#include <net/ip.h>
#if IS_ENABLED(CONFIG_IPV6)
#include <net/ip6_checksum.h>
#endif
#include "mlx4_en.h"
static int mlx4_alloc_page(struct mlx4_en_priv *priv,
struct mlx4_en_rx_alloc *frag,
gfp_t gfp)
{
struct page *page;
dma_addr_t dma;
page = alloc_page(gfp);
if (unlikely(!page))
return -ENOMEM;
dma = dma_map_page(priv->ddev, page, 0, PAGE_SIZE, priv->dma_dir);
if (unlikely(dma_mapping_error(priv->ddev, dma))) {
__free_page(page);
return -ENOMEM;
}
frag->page = page;
frag->dma = dma;
frag->page_offset = priv->rx_headroom;
return 0;
}
static int mlx4_en_alloc_frags(struct mlx4_en_priv *priv,
struct mlx4_en_rx_ring *ring,
struct mlx4_en_rx_desc *rx_desc,
struct mlx4_en_rx_alloc *frags,
gfp_t gfp)
{
int i;
for (i = 0; i < priv->num_frags; i++, frags++) {
if (!frags->page) {
if (mlx4_alloc_page(priv, frags, gfp))
return -ENOMEM;
ring->rx_alloc_pages++;
}
rx_desc->data[i].addr = cpu_to_be64(frags->dma +
frags->page_offset);
}
return 0;
}
static void mlx4_en_free_frag(const struct mlx4_en_priv *priv,
struct mlx4_en_rx_alloc *frag)
{
if (frag->page) {
dma_unmap_page(priv->ddev, frag