030739f52e
Octeon Ethernet driver is currently trying to wake up multiple
CPU cores for parallel NAPI processing when needed, to cope
with the fact that all network interfaces are handled through
the same receive queue processed by a single core/interrupt
(see http://marc.info/?l=linux-kernel&m=137209784914565&w=2).
This partially overlaps with generic RPS functionality.
Commit a6a39a7fcf ("staging: octeon-ethernet: disable load balance
for receiving packet when CONFIG_RPS is enabled") already disabled this
when RPS is enabled. Let's delete this code altogether as it has issues
like packet reordering and potential problems with CPU offlining/onlining.
Tested on EdgeRouter Lite.
Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Acked-By: David Daney <david.daney@cavium.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
105 lines
3.5 KiB
C
105 lines
3.5 KiB
C
/**********************************************************************
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* Author: Cavium Networks
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*
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* Contact: support@caviumnetworks.com
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* This file is part of the OCTEON SDK
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*
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* Copyright (c) 2003-2010 Cavium Networks
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*
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* This file is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License, Version 2, as
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* published by the Free Software Foundation.
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*
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* This file is distributed in the hope that it will be useful, but
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* AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
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* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
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* NONINFRINGEMENT. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this file; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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* or visit http://www.gnu.org/licenses/.
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*
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* This file may also be available under a different license from Cavium.
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* Contact Cavium Networks for more information
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**********************************************************************/
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/*
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* External interface for the Cavium Octeon ethernet driver.
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*/
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#ifndef OCTEON_ETHERNET_H
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#define OCTEON_ETHERNET_H
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#include <linux/of.h>
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/**
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* This is the definition of the Ethernet driver's private
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* driver state stored in netdev_priv(dev).
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*/
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struct octeon_ethernet {
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/* PKO hardware output port */
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int port;
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/* PKO hardware queue for the port */
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int queue;
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/* Hardware fetch and add to count outstanding tx buffers */
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int fau;
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/* My netdev. */
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struct net_device *netdev;
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/*
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* Type of port. This is one of the enums in
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* cvmx_helper_interface_mode_t
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*/
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int imode;
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/* List of outstanding tx buffers per queue */
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struct sk_buff_head tx_free_list[16];
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/* Device statistics */
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struct net_device_stats stats;
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struct phy_device *phydev;
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unsigned int last_link;
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/* Last negotiated link state */
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uint64_t link_info;
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/* Called periodically to check link status */
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void (*poll)(struct net_device *dev);
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struct delayed_work port_periodic_work;
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struct work_struct port_work; /* may be unused. */
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struct device_node *of_node;
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};
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int cvm_oct_free_work(void *work_queue_entry);
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extern int cvm_oct_rgmii_init(struct net_device *dev);
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extern void cvm_oct_rgmii_uninit(struct net_device *dev);
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extern int cvm_oct_rgmii_open(struct net_device *dev);
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extern int cvm_oct_rgmii_stop(struct net_device *dev);
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extern int cvm_oct_sgmii_init(struct net_device *dev);
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extern void cvm_oct_sgmii_uninit(struct net_device *dev);
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extern int cvm_oct_sgmii_open(struct net_device *dev);
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extern int cvm_oct_sgmii_stop(struct net_device *dev);
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extern int cvm_oct_spi_init(struct net_device *dev);
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extern void cvm_oct_spi_uninit(struct net_device *dev);
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extern int cvm_oct_xaui_init(struct net_device *dev);
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extern void cvm_oct_xaui_uninit(struct net_device *dev);
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extern int cvm_oct_xaui_open(struct net_device *dev);
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extern int cvm_oct_xaui_stop(struct net_device *dev);
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extern int cvm_oct_common_init(struct net_device *dev);
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extern void cvm_oct_common_uninit(struct net_device *dev);
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void cvm_oct_adjust_link(struct net_device *dev);
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int cvm_oct_common_stop(struct net_device *dev);
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extern int always_use_pow;
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extern int pow_send_group;
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extern int pow_receive_group;
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extern char pow_send_list[];
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extern struct net_device *cvm_oct_device[];
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extern struct workqueue_struct *cvm_oct_poll_queue;
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extern atomic_t cvm_oct_poll_queue_stopping;
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extern u64 cvm_oct_tx_poll_interval;
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extern int rx_napi_weight;
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#endif
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