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>
63 lines
1.9 KiB
C
63 lines
1.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/* Copyright (c) 2013-2018, 2021, The Linux Foundation. All rights reserved.
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*/
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#ifndef _RMNET_MAP_H_
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#define _RMNET_MAP_H_
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#include <linux/if_rmnet.h>
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struct rmnet_map_control_command {
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u8 command_name;
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u8 cmd_type:2;
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u8 reserved:6;
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u16 reserved2;
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u32 transaction_id;
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union {
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struct {
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u16 ip_family:2;
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u16 reserved:14;
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__be16 flow_control_seq_num;
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__be32 qos_id;
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} flow_control;
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DECLARE_FLEX_ARRAY(u8, data);
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};
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} __aligned(1);
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enum rmnet_map_commands {
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RMNET_MAP_COMMAND_NONE,
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RMNET_MAP_COMMAND_FLOW_DISABLE,
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RMNET_MAP_COMMAND_FLOW_ENABLE,
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/* These should always be the last 2 elements */
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RMNET_MAP_COMMAND_UNKNOWN,
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RMNET_MAP_COMMAND_ENUM_LENGTH
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};
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#define RMNET_MAP_COMMAND_REQUEST 0
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#define RMNET_MAP_COMMAND_ACK 1
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#define RMNET_MAP_COMMAND_UNSUPPORTED 2
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#define RMNET_MAP_COMMAND_INVALID 3
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#define RMNET_MAP_NO_PAD_BYTES 0
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#define RMNET_MAP_ADD_PAD_BYTES 1
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struct sk_buff *rmnet_map_deaggregate(struct sk_buff *skb,
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struct rmnet_port *port);
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struct rmnet_map_header *rmnet_map_add_map_header(struct sk_buff *skb,
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int hdrlen,
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struct rmnet_port *port,
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int pad);
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void rmnet_map_command(struct sk_buff *skb, struct rmnet_port *port);
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int rmnet_map_checksum_downlink_packet(struct sk_buff *skb, u16 len);
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void rmnet_map_checksum_uplink_packet(struct sk_buff *skb,
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struct rmnet_port *port,
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struct net_device *orig_dev,
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int csum_type);
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int rmnet_map_process_next_hdr_packet(struct sk_buff *skb, u16 len);
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unsigned int rmnet_map_tx_aggregate(struct sk_buff *skb, struct rmnet_port *port,
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struct net_device *orig_dev);
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void rmnet_map_tx_aggregate_init(struct rmnet_port *port);
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void rmnet_map_tx_aggregate_exit(struct rmnet_port *port);
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void rmnet_map_update_ul_agg_config(struct rmnet_port *port, u32 size,
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u32 count, u32 time);
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#endif /* _RMNET_MAP_H_ */
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