64b5d1f8f2
Add tx packets aggregation. Bidirectional TCP throughput tests through iperf with low-cat Thread-x based modems revelead performance issues both in tx and rx. The Windows driver does not show this issue: inspecting USB packets revealed that the only notable change is the driver enabling tx packets aggregation. Tx packets aggregation is by default disabled and can be enabled by increasing the value of ETHTOOL_A_COALESCE_TX_MAX_AGGR_FRAMES. The maximum aggregated size is by default set to a reasonably low value in order to support the majority of modems. This implementation is based on patches available in Code Aurora repositories (msm kernel) whose main authors are Subash Abhinov Kasiviswanathan <subashab@codeaurora.org> Sean Tranchetti <stranche@codeaurora.org> Signed-off-by: Daniele Palmas <dnlplm@gmail.com> Reviewed-by: Subash Abhinov Kasiviswanathan <quic_subashab@quicinc.com> Signed-off-by: David S. Miller <davem@davemloft.net>
101 lines
2.3 KiB
C
101 lines
2.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/* Copyright (c) 2013-2014, 2016-2018, 2021 The Linux Foundation.
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* All rights reserved.
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*
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* RMNET Data configuration engine
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*/
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#include <linux/skbuff.h>
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#include <linux/time.h>
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#include <net/gro_cells.h>
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#ifndef _RMNET_CONFIG_H_
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#define _RMNET_CONFIG_H_
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#define RMNET_MAX_LOGICAL_EP 255
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struct rmnet_endpoint {
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u8 mux_id;
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struct net_device *egress_dev;
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struct hlist_node hlnode;
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};
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struct rmnet_egress_agg_params {
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u32 bytes;
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u32 count;
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u64 time_nsec;
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};
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/* One instance of this structure is instantiated for each real_dev associated
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* with rmnet.
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*/
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struct rmnet_port {
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struct net_device *dev;
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u32 data_format;
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u8 nr_rmnet_devs;
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u8 rmnet_mode;
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struct hlist_head muxed_ep[RMNET_MAX_LOGICAL_EP];
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struct net_device *bridge_ep;
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struct net_device *rmnet_dev;
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/* Egress aggregation information */
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struct rmnet_egress_agg_params egress_agg_params;
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/* Protect aggregation related elements */
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spinlock_t agg_lock;
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struct sk_buff *skbagg_head;
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struct sk_buff *skbagg_tail;
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int agg_state;
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u8 agg_count;
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struct timespec64 agg_time;
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struct timespec64 agg_last;
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struct hrtimer hrtimer;
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struct work_struct agg_wq;
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};
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extern struct rtnl_link_ops rmnet_link_ops;
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struct rmnet_vnd_stats {
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u64 rx_pkts;
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u64 rx_bytes;
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u64 tx_pkts;
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u64 tx_bytes;
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u32 tx_drops;
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};
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struct rmnet_pcpu_stats {
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struct rmnet_vnd_stats stats;
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struct u64_stats_sync syncp;
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};
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struct rmnet_priv_stats {
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u64 csum_ok;
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u64 csum_ip4_header_bad;
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u64 csum_valid_unset;
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u64 csum_validation_failed;
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u64 csum_err_bad_buffer;
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u64 csum_err_invalid_ip_version;
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u64 csum_err_invalid_transport;
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u64 csum_fragmented_pkt;
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u64 csum_skipped;
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u64 csum_sw;
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u64 csum_hw;
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};
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struct rmnet_priv {
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u8 mux_id;
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struct net_device *real_dev;
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struct rmnet_pcpu_stats __percpu *pcpu_stats;
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struct gro_cells gro_cells;
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struct rmnet_priv_stats stats;
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};
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struct rmnet_port *rmnet_get_port_rcu(struct net_device *real_dev);
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struct rmnet_endpoint *rmnet_get_endpoint(struct rmnet_port *port, u8 mux_id);
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int rmnet_add_bridge(struct net_device *rmnet_dev,
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struct net_device *slave_dev,
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struct netlink_ext_ack *extack);
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int rmnet_del_bridge(struct net_device *rmnet_dev,
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struct net_device *slave_dev);
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struct rmnet_port*
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rmnet_get_port_rtnl(const struct net_device *real_dev);
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#endif /* _RMNET_CONFIG_H_ */
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