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7b5b7a597f
Add ethtool support to configure the IRQ coalescing behavior. Support separate timers for Rx and Tx for time based coalescing. For frame based configuration, currently we only support the Rx side. The hardware allows configuration of descriptor count instead of frame count requiring conversion between the two. We assume 2 descriptors per frame, one for the metadata and one for the data segment. When rx-frames are not configured, we set the RX descriptor count to half the ring size as a fail safe. Default configuration: ethtool -c eth0 | grep -E "rx-usecs:|tx-usecs:|rx-frames:" rx-usecs: 30 rx-frames: 0 tx-usecs: 35 IRQ rate test: With single iperf flow we monitor IRQ rate while changing the tx-usesc and rx-usecs to high and low values. ethtool -C eth0 rx-frames 8192 rx-usecs 150 tx-usecs 150 irq/sec 13k irq/sec 14k irq/sec 14k ethtool -C eth0 rx-frames 8192 rx-usecs 10 tx-usecs 10 irq/sec 27k irq/sec 28k irq/sec 28k Validating the use of extack: ethtool -C eth0 rx-frames 16384 netlink error: fbnic: rx_frames is above device max netlink error: Invalid argument Signed-off-by: Mohsin Bashir <mohsin.bashr@gmail.com> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Reviewed-by: Brett Creeley <brett.creeley@amd.com> Reviewed-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com> Link: https://patch.msgid.link/20250218023520.2038010-1-mohsin.bashr@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
98 lines
2.6 KiB
C
98 lines
2.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/* Copyright (c) Meta Platforms, Inc. and affiliates. */
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#ifndef _FBNIC_NETDEV_H_
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#define _FBNIC_NETDEV_H_
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#include <linux/types.h>
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#include <linux/phylink.h>
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#include "fbnic_csr.h"
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#include "fbnic_rpc.h"
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#include "fbnic_txrx.h"
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#define FBNIC_MAX_NAPI_VECTORS 128u
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#define FBNIC_MIN_RXD_PER_FRAME 2
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/* Natively supported tunnel GSO features (not thru GSO_PARTIAL) */
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#define FBNIC_TUN_GSO_FEATURES NETIF_F_GSO_IPXIP6
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struct fbnic_net {
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struct fbnic_ring *tx[FBNIC_MAX_TXQS];
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struct fbnic_ring *rx[FBNIC_MAX_RXQS];
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struct fbnic_napi_vector *napi[FBNIC_MAX_NAPI_VECTORS];
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struct net_device *netdev;
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struct fbnic_dev *fbd;
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u32 txq_size;
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u32 hpq_size;
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u32 ppq_size;
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u32 rcq_size;
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u16 rx_usecs;
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u16 tx_usecs;
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u32 rx_max_frames;
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u16 num_napi;
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struct phylink *phylink;
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struct phylink_config phylink_config;
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struct phylink_pcs phylink_pcs;
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/* TBD: Remove these when phylink supports FEC and lane config */
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u8 fec;
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u8 link_mode;
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/* Cached top bits of the HW time counter for 40b -> 64b conversion */
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u32 time_high;
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/* Protect readers of @time_offset, writers take @time_lock. */
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struct u64_stats_sync time_seq;
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/* Offset in ns between free running NIC PHC and time set via PTP
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* clock callbacks
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*/
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s64 time_offset;
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u16 num_tx_queues;
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u16 num_rx_queues;
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u8 indir_tbl[FBNIC_RPC_RSS_TBL_COUNT][FBNIC_RPC_RSS_TBL_SIZE];
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u32 rss_key[FBNIC_RPC_RSS_KEY_DWORD_LEN];
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u32 rss_flow_hash[FBNIC_NUM_HASH_OPT];
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/* Storage for stats after ring destruction */
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struct fbnic_queue_stats tx_stats;
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struct fbnic_queue_stats rx_stats;
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u64 link_down_events;
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/* Time stampinn filter config */
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struct kernel_hwtstamp_config hwtstamp_config;
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};
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int __fbnic_open(struct fbnic_net *fbn);
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void fbnic_up(struct fbnic_net *fbn);
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void fbnic_down(struct fbnic_net *fbn);
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void fbnic_down_noidle(struct fbnic_net *fbn);
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struct net_device *fbnic_netdev_alloc(struct fbnic_dev *fbd);
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void fbnic_netdev_free(struct fbnic_dev *fbd);
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int fbnic_netdev_register(struct net_device *netdev);
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void fbnic_netdev_unregister(struct net_device *netdev);
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void fbnic_reset_queues(struct fbnic_net *fbn,
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unsigned int tx, unsigned int rx);
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void fbnic_set_ethtool_ops(struct net_device *dev);
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int fbnic_ptp_setup(struct fbnic_dev *fbd);
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void fbnic_ptp_destroy(struct fbnic_dev *fbd);
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void fbnic_time_init(struct fbnic_net *fbn);
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int fbnic_time_start(struct fbnic_net *fbn);
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void fbnic_time_stop(struct fbnic_net *fbn);
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void __fbnic_set_rx_mode(struct net_device *netdev);
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void fbnic_clear_rx_mode(struct net_device *netdev);
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int fbnic_phylink_init(struct net_device *netdev);
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#endif /* _FBNIC_NETDEV_H_ */
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