9fe00c800e
Representor RX uses a NAPI context driven by a 'fake interrupt': when the parent PF receives a packet destined for the representor, it adds it to an SKB list (efv->rx_list), and schedules NAPI if the 'fake interrupt' is primed. The NAPI poll then pulls packets off this list and feeds them to the stack with netif_receive_skb_list(). This scheme allows us to decouple representor RX from the parent PF's RX fast-path. This patch implements the 'top half', which builds an SKB, copies data into it from the RX buffer (which can then be released), adds it to the queue and fires the 'fake interrupt' if necessary. Signed-off-by: Edward Cree <ecree.xilinx@gmail.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
62 lines
1.9 KiB
C
62 lines
1.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/****************************************************************************
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* Driver for Solarflare network controllers and boards
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* Copyright 2019 Solarflare Communications Inc.
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* Copyright 2020-2022 Xilinx Inc.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published
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* by the Free Software Foundation, incorporated herein by reference.
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*/
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/* Handling for ef100 representor netdevs */
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#ifndef EF100_REP_H
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#define EF100_REP_H
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#include "net_driver.h"
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struct efx_rep_sw_stats {
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atomic64_t rx_packets, tx_packets;
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atomic64_t rx_bytes, tx_bytes;
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atomic64_t rx_dropped, tx_errors;
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};
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/**
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* struct efx_rep - Private data for an Efx representor
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*
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* @parent: the efx PF which manages this representor
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* @net_dev: representor netdevice
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* @msg_enable: log message enable flags
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* @mport: m-port ID of corresponding VF
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* @idx: VF index
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* @write_index: number of packets enqueued to @rx_list
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* @read_index: number of packets consumed from @rx_list
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* @rx_pring_size: max length of RX list
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* @list: entry on efx->vf_reps
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* @rx_list: list of SKBs queued for receive in NAPI poll
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* @rx_lock: protects @rx_list
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* @napi: NAPI control structure
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* @stats: software traffic counters for netdev stats
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*/
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struct efx_rep {
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struct efx_nic *parent;
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struct net_device *net_dev;
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u32 msg_enable;
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u32 mport;
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unsigned int idx;
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unsigned int write_index, read_index;
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unsigned int rx_pring_size;
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struct list_head list;
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struct list_head rx_list;
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spinlock_t rx_lock;
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struct napi_struct napi;
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struct efx_rep_sw_stats stats;
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};
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int efx_ef100_vfrep_create(struct efx_nic *efx, unsigned int i);
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void efx_ef100_vfrep_destroy(struct efx_nic *efx, struct efx_rep *efv);
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void efx_ef100_fini_vfreps(struct efx_nic *efx);
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void efx_ef100_rep_rx_packet(struct efx_rep *efv, struct efx_rx_buffer *rx_buf);
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#endif /* EF100_REP_H */
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