Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
51 lines
1.4 KiB
C
51 lines
1.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/* Copyright (C) 2024 Intel Corporation */
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#ifndef __LIBIE_RX_H
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#define __LIBIE_RX_H
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#include <net/libeth/rx.h>
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/* Rx buffer management */
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/* The largest size for a single descriptor as per HW */
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#define LIBIE_MAX_RX_BUF_LEN 9728U
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/* "True" HW-writeable space: minimum from SW and HW values */
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#define LIBIE_RX_BUF_LEN(hr) min_t(u32, LIBETH_RX_PAGE_LEN(hr), \
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LIBIE_MAX_RX_BUF_LEN)
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/* The maximum frame size as per HW (S/G) */
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#define __LIBIE_MAX_RX_FRM_LEN 16382U
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/* ATST, HW can chain up to 5 Rx descriptors */
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#define LIBIE_MAX_RX_FRM_LEN(hr) \
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min_t(u32, __LIBIE_MAX_RX_FRM_LEN, LIBIE_RX_BUF_LEN(hr) * 5)
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/* Maximum frame size minus LL overhead */
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#define LIBIE_MAX_MTU \
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(LIBIE_MAX_RX_FRM_LEN(LIBETH_MAX_HEADROOM) - LIBETH_RX_LL_LEN)
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/* O(1) converting i40e/ice/iavf's 8/10-bit hardware packet type to a parsed
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* bitfield struct.
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*/
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#define LIBIE_RX_PT_NUM 154
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extern const struct libeth_rx_pt libie_rx_pt_lut[LIBIE_RX_PT_NUM];
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/**
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* libie_rx_pt_parse - convert HW packet type to software bitfield structure
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* @pt: 10-bit hardware packet type value from the descriptor
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*
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* ```libie_rx_pt_lut``` must be accessed only using this wrapper.
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*
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* Return: parsed bitfield struct corresponding to the provided ptype.
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*/
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static inline struct libeth_rx_pt libie_rx_pt_parse(u32 pt)
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{
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if (unlikely(pt >= LIBIE_RX_PT_NUM))
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pt = 0;
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return libie_rx_pt_lut[pt];
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}
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#endif /* __LIBIE_RX_H */
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