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The lan969x switch device supports manual frame injection and extraction to and from the switch core, using a number of injection and extraction queues. This technique is currently supported, but delivers poor performance compared to Frame DMA (FDMA). This lan969x implementation of FDMA, hooks into the existing FDMA for Sparx5, but requires its own RX and TX handling, as lan969x does not support the same native cache coherency that Sparx5 does. Effectively, this means that we are going to use the DMA mapping API for mapping and unmapping TX buffers. The RX loop will utilize the page pool API for efficient RX handling. Other than that, the implementation is largely the same, and utilizes the FDMA library for DCB and DB handling. Some numbers: Manual injection/extraction (before this series): // iperf3 -c 1.0.1.1 [ ID] Interval Transfer Bitrate [ 5] 0.00-10.02 sec 345 MBytes 289 Mbits/sec sender [ 5] 0.00-10.06 sec 345 MBytes 288 Mbits/sec receiver FDMA (after this series): // iperf3 -c 1.0.1.1 [ ID] Interval Transfer Bitrate [ 5] 0.00-10.03 sec 1.10 GBytes 940 Mbits/sec sender [ 5] 0.00-10.07 sec 1.10 GBytes 936 Mbits/sec receiver Reviewed-by: Steen Hegelund <Steen.Hegelund@microchip.com> Signed-off-by: Daniel Machon <daniel.machon@microchip.com> Link: https://patch.msgid.link/20250113-sparx5-lan969x-switch-driver-5-v2-5-c468f02fd623@microchip.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
83 lines
2.4 KiB
C
83 lines
2.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/* Microchip lan969x Switch driver
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*
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* Copyright (c) 2024 Microchip Technology Inc. and its subsidiaries.
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*/
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#ifndef __LAN969X_H__
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#define __LAN969X_H__
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#include "../sparx5/sparx5_main.h"
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#include "../sparx5/sparx5_regs.h"
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#include "../sparx5/sparx5_vcap_impl.h"
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/* lan969x.c */
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extern const struct sparx5_match_data lan969x_desc;
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/* lan969x_vcap_ag_api.c */
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extern const struct vcap_statistics lan969x_vcap_stats;
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extern const struct vcap_info lan969x_vcaps[];
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/* lan969x_vcap_impl.c */
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extern const struct sparx5_vcap_inst lan969x_vcap_inst_cfg[];
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/* lan969x_regs.c */
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extern const unsigned int lan969x_tsize[TSIZE_LAST];
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extern const unsigned int lan969x_raddr[RADDR_LAST];
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extern const unsigned int lan969x_rcnt[RCNT_LAST];
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extern const unsigned int lan969x_gaddr[GADDR_LAST];
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extern const unsigned int lan969x_gcnt[GCNT_LAST];
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extern const unsigned int lan969x_gsize[GSIZE_LAST];
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extern const unsigned int lan969x_fpos[FPOS_LAST];
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extern const unsigned int lan969x_fsize[FSIZE_LAST];
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static inline bool lan969x_port_is_2g5(int portno)
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{
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return portno == 1 || portno == 2 || portno == 3 ||
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portno == 5 || portno == 6 || portno == 7 ||
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portno == 10 || portno == 11 || portno == 14 ||
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portno == 15 || portno == 18 || portno == 19 ||
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portno == 22 || portno == 23;
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}
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static inline bool lan969x_port_is_5g(int portno)
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{
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return portno == 9 || portno == 13 || portno == 17 ||
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portno == 21;
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}
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static inline bool lan969x_port_is_10g(int portno)
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{
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return portno == 0 || portno == 4 || portno == 8 ||
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portno == 12 || portno == 16 || portno == 20 ||
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portno == 24 || portno == 25 || portno == 26 ||
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portno == 27;
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}
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static inline bool lan969x_port_is_25g(int portno)
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{
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return false;
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}
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static inline bool lan969x_port_is_rgmii(int portno)
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{
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return portno == 28 || portno == 29;
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}
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/* lan969x_calendar.c */
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int lan969x_dsm_calendar_calc(struct sparx5 *sparx5, u32 taxi,
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struct sparx5_calendar_data *data);
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/* lan969x_rgmii.c */
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int lan969x_port_config_rgmii(struct sparx5_port *port,
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struct sparx5_port_config *conf);
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/* lan969x_fdma.c */
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int lan969x_fdma_init(struct sparx5 *sparx5);
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int lan969x_fdma_deinit(struct sparx5 *sparx5);
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int lan969x_fdma_napi_poll(struct napi_struct *napi, int weight);
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int lan969x_fdma_xmit(struct sparx5 *sparx5, u32 *ifh, struct sk_buff *skb,
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struct net_device *dev);
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#endif
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