ixgbe.h (6f84981772535e670e4e2df051a672af229b6694) ixgbe.h (0967bf837784a11c65d66060623a74e65211af0b)
1/* SPDX-License-Identifier: GPL-2.0 */
2/* Copyright(c) 1999 - 2018 Intel Corporation. */
3
4#ifndef _IXGBE_H_
5#define _IXGBE_H_
6
7#include <linux/bitops.h>
8#include <linux/types.h>

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68/* Supported Rx Buffer Sizes */
69#define IXGBE_RXBUFFER_256 256 /* Used for skb receive header */
70#define IXGBE_RXBUFFER_1536 1536
71#define IXGBE_RXBUFFER_2K 2048
72#define IXGBE_RXBUFFER_3K 3072
73#define IXGBE_RXBUFFER_4K 4096
74#define IXGBE_MAX_RXBUFFER 16384 /* largest size for a single descriptor */
75
1/* SPDX-License-Identifier: GPL-2.0 */
2/* Copyright(c) 1999 - 2018 Intel Corporation. */
3
4#ifndef _IXGBE_H_
5#define _IXGBE_H_
6
7#include <linux/bitops.h>
8#include <linux/types.h>

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68/* Supported Rx Buffer Sizes */
69#define IXGBE_RXBUFFER_256 256 /* Used for skb receive header */
70#define IXGBE_RXBUFFER_1536 1536
71#define IXGBE_RXBUFFER_2K 2048
72#define IXGBE_RXBUFFER_3K 3072
73#define IXGBE_RXBUFFER_4K 4096
74#define IXGBE_MAX_RXBUFFER 16384 /* largest size for a single descriptor */
75
76#define IXGBE_PKT_HDR_PAD (ETH_HLEN + ETH_FCS_LEN + (VLAN_HLEN * 2))
77
76/* Attempt to maximize the headroom available for incoming frames. We
77 * use a 2K buffer for receives and need 1536/1534 to store the data for
78 * the frame. This leaves us with 512 bytes of room. From that we need
79 * to deduct the space needed for the shared info and the padding needed
80 * to IP align the frame.
81 *
82 * Note: For cache line sizes 256 or larger this value is going to end
83 * up negative. In these cases we should fall back to the 3K

--- 1021 unchanged lines hidden --- 		78/* Attempt to maximize the headroom available for incoming frames. We
79 * use a 2K buffer for receives and need 1536/1534 to store the data for
80 * the frame. This leaves us with 512 bytes of room. From that we need
81 * to deduct the space needed for the shared info and the padding needed
82 * to IP align the frame.
83 *
84 * Note: For cache line sizes 256 or larger this value is going to end
85 * up negative. In these cases we should fall back to the 3K

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