0d14657f40
aq_xdp() is a xdp setup callback function for Atlantic driver. When XDP is attached or detached, the device will be restarted because it uses different headroom, tailroom, and page order value. If XDP enabled, it switches default page order value from 0 to 2. Because the default maximum frame size is still 2K and it needs additional area for headroom and tailroom. The total size(headroom + frame size + tailroom) is 2624. So, 1472Bytes will be always wasted for every frame. But when order-2 is used, these pages can be used 6 times with flip strategy. It means only about 106Bytes per frame will be wasted. Also, It supports xdp fragment feature. MTU can be 16K if xdp prog supports xdp fragment. If not, MTU can not exceed 2K - ETH_HLEN - ETH_FCS. And a static key is added and It will be used to call the xdp_clean handler in ->poll(). data plane implementation will be contained the followed patch. Signed-off-by: Taehee Yoo <ap420073@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
49 lines
1.5 KiB
C
49 lines
1.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/* Atlantic Network Driver
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*
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* Copyright (C) 2014-2019 aQuantia Corporation
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* Copyright (C) 2019-2020 Marvell International Ltd.
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*/
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/* File aq_vec.h: Definition of common structures for vector of Rx and Tx rings.
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* Declaration of functions for Rx and Tx rings.
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*/
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#ifndef AQ_VEC_H
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#define AQ_VEC_H
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#include "aq_common.h"
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#include "aq_nic.h"
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#include "aq_ring.h"
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#include "aq_hw.h"
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#include <linux/irqreturn.h>
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#include <linux/filter.h>
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#include <linux/netdevice.h>
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struct aq_hw_s;
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struct aq_hw_ops;
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struct aq_nic_s;
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struct aq_nic_cfg_s;
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struct aq_ring_stats_rx_s;
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struct aq_ring_stats_tx_s;
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irqreturn_t aq_vec_isr(int irq, void *private);
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irqreturn_t aq_vec_isr_legacy(int irq, void *private);
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struct aq_vec_s *aq_vec_alloc(struct aq_nic_s *aq_nic, unsigned int idx,
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struct aq_nic_cfg_s *aq_nic_cfg);
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int aq_vec_ring_alloc(struct aq_vec_s *self, struct aq_nic_s *aq_nic,
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unsigned int idx, struct aq_nic_cfg_s *aq_nic_cfg);
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int aq_vec_init(struct aq_vec_s *self, const struct aq_hw_ops *aq_hw_ops,
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struct aq_hw_s *aq_hw);
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void aq_vec_deinit(struct aq_vec_s *self);
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void aq_vec_free(struct aq_vec_s *self);
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void aq_vec_ring_free(struct aq_vec_s *self);
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int aq_vec_start(struct aq_vec_s *self);
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void aq_vec_stop(struct aq_vec_s *self);
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cpumask_t *aq_vec_get_affinity_mask(struct aq_vec_s *self);
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bool aq_vec_is_valid_tc(struct aq_vec_s *self, const unsigned int tc);
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unsigned int aq_vec_get_sw_stats(struct aq_vec_s *self, const unsigned int tc, u64 *data);
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#endif /* AQ_VEC_H */
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