/**********************************************************************
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* Author: Cavium, Inc.
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*
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* Contact: support@cavium.com
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* Please include "LiquidIO" in the subject.
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*
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* Copyright (c) 2003-2016 Cavium, Inc.
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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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/*! \file octeon_network.h
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* \brief Host NIC Driver: Structure and Macro definitions used by NIC Module.
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*/
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#ifndef __OCTEON_NETWORK_H__
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#define __OCTEON_NETWORK_H__
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#include <linux/ptp_clock_kernel.h>
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#define LIO_MAX_MTU_SIZE (OCTNET_MAX_FRM_SIZE - OCTNET_FRM_HEADER_SIZE)
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#define LIO_MIN_MTU_SIZE ETH_MIN_MTU
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/* Bit mask values for lio->ifstate */
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#define LIO_IFSTATE_DROQ_OPS 0x01
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#define LIO_IFSTATE_REGISTERED 0x02
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#define LIO_IFSTATE_RUNNING 0x04
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#define LIO_IFSTATE_RX_TIMESTAMP_ENABLED 0x08
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#define LIO_IFSTATE_RESETTING 0x10
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struct liquidio_if_cfg_resp {
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u64 rh;
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struct liquidio_if_cfg_info cfg_info;
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u64 status;
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};
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#define LIO_IFCFG_WAIT_TIME 3000 /* In milli seconds */
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#define LIQUIDIO_NDEV_STATS_POLL_TIME_MS 200
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/* Structure of a node in list of gather components maintained by
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* NIC driver for each network device.
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*/
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struct octnic_gather {
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/* List manipulation. Next and prev pointers. */
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struct list_head list;
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/* Size of the gather component at sg in bytes. */
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int sg_size;
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/* Number of bytes that sg was adjusted to make it 8B-aligned. */
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int adjust;
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/* Gather component that can accommodate max sized fragment list
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* received from the IP layer.
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*/
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struct octeon_sg_entry *sg;
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dma_addr_t sg_dma_ptr;
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};
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struct oct_nic_stats_resp {
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u64 rh;
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struct oct_link_stats stats;
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u64 status;
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};
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struct oct_nic_vf_stats_resp {
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u64 rh;
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u64 spoofmac_cnt;
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u64 status;
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};
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struct oct_nic_stats_ctrl {
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struct completion complete;
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struct net_device *netdev;
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};
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struct oct_nic_seapi_resp {
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u64 rh;
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union {
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u32 fec_setting;
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u32 speed;
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};
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u64 status;
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};
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/** LiquidIO per-interface network private data */
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struct lio {
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/** State of the interface. Rx/Tx happens only in the RUNNING state. */
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atomic_t ifstate;
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/** Octeon Interface index number. This device will be represented as
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* oct<ifidx> in the system.
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*/
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int ifidx;
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/** Octeon Input queue to use to transmit for this network interface. */
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int txq;
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/** Octeon Output queue from which pkts arrive
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* for this network interface.
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*/
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int rxq;
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/** Guards each glist */
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spinlock_t *glist_lock;
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/** Array of gather component linked lists */
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struct list_head *glist;
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void **glists_virt_base;
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dma_addr_t *glists_dma_base;
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u32 glist_entry_size;
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/** Pointer to the NIC properties for the Octeon device this network
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* interface is associated with.
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*/
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struct octdev_props *octprops;
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/** Pointer to the octeon device structure. */
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struct octeon_device *oct_dev;
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struct net_device *netdev;
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/** Link information sent by the core application for this interface. */
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struct oct_link_info linfo;
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/** counter of link changes */
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u64 link_changes;
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/** Size of Tx queue for this octeon device. */
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u32 tx_qsize;
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/** Size of Rx queue for this octeon device. */
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u32 rx_qsize;
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/** Size of MTU this octeon device. */
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u32 mtu;
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/** msg level flag per interface. */
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u32 msg_enable;
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/** Copy of Interface capabilities: TSO, TSO6, LRO, Chescksums . */
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u64 dev_capability;
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/* Copy of transmit encapsulation capabilities:
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* TSO, TSO6, Checksums for this device for Kernel
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* 3.10.0 onwards
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*/
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u64 enc_dev_capability;
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/** Copy of beacaon reg in phy */
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u32 phy_beacon_val;
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/** Copy of ctrl reg in phy */
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u32 led_ctrl_val;
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/* PTP clock information */
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struct ptp_clock_info ptp_info;
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struct ptp_clock *ptp_clock;
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s64 ptp_adjust;
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/* for atomic access to Octeon PTP reg and data struct */
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spinlock_t ptp_lock;
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/* Interface info */
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u32 intf_open;
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/* work queue for txq status */
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struct cavium_wq txq_status_wq;
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/* work queue for rxq oom status */
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struct cavium_wq rxq_status_wq[MAX_POSSIBLE_OCTEON_OUTPUT_QUEUES];
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/* work queue for link status */
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struct cavium_wq link_status_wq;
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/* work queue to regularly send local time to octeon firmware */
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struct cavium_wq sync_octeon_time_wq;
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int netdev_uc_count;
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struct cavium_wk stats_wk;
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};
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#define LIO_SIZE (sizeof(struct lio))
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#define GET_LIO(netdev) ((struct lio *)netdev_priv(netdev))
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#define LIO_MAX_CORES 16
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/**
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* \brief Enable or disable feature
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* @param netdev pointer to network device
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* @param cmd Command that just requires acknowledgment
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* @param param1 Parameter to command
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*/
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int liquidio_set_feature(struct net_device *netdev, int cmd, u16 param1);
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int setup_rx_oom_poll_fn(struct net_device *netdev);
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void cleanup_rx_oom_poll_fn(struct net_device *netdev);
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/**
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* \brief Link control command completion callback
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* @param nctrl_ptr pointer to control packet structure
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*
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* This routine is called by the callback function when a ctrl pkt sent to
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* core app completes. The nctrl_ptr contains a copy of the command type
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* and data sent to the core app. This routine is only called if the ctrl
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* pkt was sent successfully to the core app.
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*/
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void liquidio_link_ctrl_cmd_completion(void *nctrl_ptr);
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int liquidio_setup_io_queues(struct octeon_device *octeon_dev, int ifidx,
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u32 num_iqs, u32 num_oqs);
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irqreturn_t liquidio_msix_intr_handler(int irq __attribute__((unused)),
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void *dev);
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int octeon_setup_interrupt(struct octeon_device *oct, u32 num_ioqs);
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void lio_fetch_stats(struct work_struct *work);
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int lio_wait_for_clean_oq(struct octeon_device *oct);
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/**
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* \brief Register ethtool operations
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* @param netdev pointer to network device
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*/
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void liquidio_set_ethtool_ops(struct net_device *netdev);
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void lio_delete_glists(struct lio *lio);
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int lio_setup_glists(struct octeon_device *oct, struct lio *lio, int num_qs);
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int liquidio_get_speed(struct lio *lio);
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int liquidio_set_speed(struct lio *lio, int speed);
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int liquidio_get_fec(struct lio *lio);
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int liquidio_set_fec(struct lio *lio, int on_off);
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/**
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* \brief Net device change_mtu
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* @param netdev network device
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*/
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int liquidio_change_mtu(struct net_device *netdev, int new_mtu);
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#define LIO_CHANGE_MTU_SUCCESS 1
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#define LIO_CHANGE_MTU_FAIL 2
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#define SKB_ADJ_MASK 0x3F
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#define SKB_ADJ (SKB_ADJ_MASK + 1)
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#define MIN_SKB_SIZE 256 /* 8 bytes and more - 8 bytes for PTP */
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#define LIO_RXBUFFER_SZ 2048
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static inline void
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*recv_buffer_alloc(struct octeon_device *oct,
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struct octeon_skb_page_info *pg_info)
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{
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struct page *page;
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struct sk_buff *skb;
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struct octeon_skb_page_info *skb_pg_info;
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page = alloc_page(GFP_ATOMIC);
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if (unlikely(!page))
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return NULL;
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skb = dev_alloc_skb(MIN_SKB_SIZE + SKB_ADJ);
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if (unlikely(!skb)) {
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__free_page(page);
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pg_info->page = NULL;
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return NULL;
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}
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if ((unsigned long)skb->data & SKB_ADJ_MASK) {
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u32 r = SKB_ADJ - ((unsigned long)skb->data & SKB_ADJ_MASK);
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skb_reserve(skb, r);
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}
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skb_pg_info = ((struct octeon_skb_page_info *)(skb->cb));
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/* Get DMA info */
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pg_info->dma = dma_map_page(&oct->pci_dev->dev, page, 0,
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PAGE_SIZE, DMA_FROM_DEVICE);
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/* Mapping failed!! */
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if (dma_mapping_error(&oct->pci_dev->dev, pg_info->dma)) {
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__free_page(page);
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dev_kfree_skb_any((struct sk_buff *)skb);
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pg_info->page = NULL;
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return NULL;
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}
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pg_info->page = page;
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pg_info->page_offset = 0;
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skb_pg_info->page = page;
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skb_pg_info->page_offset = 0;
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skb_pg_info->dma = pg_info->dma;
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return (void *)skb;
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}
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static inline void
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*recv_buffer_fast_alloc(u32 size)
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{
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struct sk_buff *skb;
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struct octeon_skb_page_info *skb_pg_info;
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skb = dev_alloc_skb(size + SKB_ADJ);
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if (unlikely(!skb))
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return NULL;
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if ((unsigned long)skb->data & SKB_ADJ_MASK) {
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u32 r = SKB_ADJ - ((unsigned long)skb->data & SKB_ADJ_MASK);
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skb_reserve(skb, r);
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}
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skb_pg_info = ((struct octeon_skb_page_info *)(skb->cb));
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skb_pg_info->page = NULL;
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skb_pg_info->page_offset = 0;
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skb_pg_info->dma = 0;
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return skb;
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}
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static inline int
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recv_buffer_recycle(struct octeon_device *oct, void *buf)
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{
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struct octeon_skb_page_info *pg_info = buf;
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if (!pg_info->page) {
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dev_err(&oct->pci_dev->dev, "%s: pg_info->page NULL\n",
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__func__);
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return -ENOMEM;
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}
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if (unlikely(page_count(pg_info->page) != 1) ||
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unlikely(page_to_nid(pg_info->page) != numa_node_id())) {
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dma_unmap_page(&oct->pci_dev->dev,
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pg_info->dma, (PAGE_SIZE << 0),
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DMA_FROM_DEVICE);
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pg_info->dma = 0;
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pg_info->page = NULL;
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pg_info->page_offset = 0;
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return -ENOMEM;
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}
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/* Flip to other half of the buffer */
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if (pg_info->page_offset == 0)
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pg_info->page_offset = LIO_RXBUFFER_SZ;
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else
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pg_info->page_offset = 0;
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page_ref_inc(pg_info->page);
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return 0;
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}
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static inline void
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*recv_buffer_reuse(struct octeon_device *oct, void *buf)
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{
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struct octeon_skb_page_info *pg_info = buf, *skb_pg_info;
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struct sk_buff *skb;
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skb = dev_alloc_skb(MIN_SKB_SIZE + SKB_ADJ);
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if (unlikely(!skb)) {
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dma_unmap_page(&oct->pci_dev->dev,
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pg_info->dma, (PAGE_SIZE << 0),
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DMA_FROM_DEVICE);
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return NULL;
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}
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if ((unsigned long)skb->data & SKB_ADJ_MASK) {
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u32 r = SKB_ADJ - ((unsigned long)skb->data & SKB_ADJ_MASK);
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skb_reserve(skb, r);
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}
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skb_pg_info = ((struct octeon_skb_page_info *)(skb->cb));
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skb_pg_info->page = pg_info->page;
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skb_pg_info->page_offset = pg_info->page_offset;
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skb_pg_info->dma = pg_info->dma;
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return skb;
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}
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static inline void
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recv_buffer_destroy(void *buffer, struct octeon_skb_page_info *pg_info)
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{
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struct sk_buff *skb = (struct sk_buff *)buffer;
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put_page(pg_info->page);
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pg_info->dma = 0;
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pg_info->page = NULL;
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pg_info->page_offset = 0;
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if (skb)
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dev_kfree_skb_any(skb);
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}
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static inline void recv_buffer_free(void *buffer)
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{
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struct sk_buff *skb = (struct sk_buff *)buffer;
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struct octeon_skb_page_info *pg_info;
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pg_info = ((struct octeon_skb_page_info *)(skb->cb));
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if (pg_info->page) {
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put_page(pg_info->page);
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pg_info->dma = 0;
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pg_info->page = NULL;
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pg_info->page_offset = 0;
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}
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dev_kfree_skb_any((struct sk_buff *)buffer);
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}
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static inline void
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recv_buffer_fast_free(void *buffer)
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{
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dev_kfree_skb_any((struct sk_buff *)buffer);
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}
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static inline void tx_buffer_free(void *buffer)
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{
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dev_kfree_skb_any((struct sk_buff *)buffer);
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}
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#define lio_dma_alloc(oct, size, dma_addr) \
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dma_alloc_coherent(&(oct)->pci_dev->dev, size, dma_addr, GFP_KERNEL)
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#define lio_dma_free(oct, size, virt_addr, dma_addr) \
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dma_free_coherent(&(oct)->pci_dev->dev, size, virt_addr, dma_addr)
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static inline
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void *get_rbd(struct sk_buff *skb)
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{
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struct octeon_skb_page_info *pg_info;
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unsigned char *va;
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pg_info = ((struct octeon_skb_page_info *)(skb->cb));
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va = page_address(pg_info->page) + pg_info->page_offset;
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return va;
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}
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static inline u64
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lio_map_ring(void *buf)
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{
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dma_addr_t dma_addr;
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struct sk_buff *skb = (struct sk_buff *)buf;
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struct octeon_skb_page_info *pg_info;
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pg_info = ((struct octeon_skb_page_info *)(skb->cb));
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if (!pg_info->page) {
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pr_err("%s: pg_info->page NULL\n", __func__);
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WARN_ON(1);
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}
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/* Get DMA info */
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dma_addr = pg_info->dma;
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if (!pg_info->dma) {
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pr_err("%s: ERROR it should be already available\n",
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__func__);
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WARN_ON(1);
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}
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dma_addr += pg_info->page_offset;
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return (u64)dma_addr;
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}
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static inline void
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lio_unmap_ring(struct pci_dev *pci_dev,
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u64 buf_ptr)
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{
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dma_unmap_page(&pci_dev->dev,
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buf_ptr, (PAGE_SIZE << 0),
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DMA_FROM_DEVICE);
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}
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static inline void *octeon_fast_packet_alloc(u32 size)
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{
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return recv_buffer_fast_alloc(size);
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}
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static inline void octeon_fast_packet_next(struct octeon_droq *droq,
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struct sk_buff *nicbuf,
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int copy_len,
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int idx)
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{
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skb_put_data(nicbuf, get_rbd(droq->recv_buf_list[idx].buffer),
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copy_len);
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}
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/**
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* \brief check interface state
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* @param lio per-network private data
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* @param state_flag flag state to check
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*/
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static inline int ifstate_check(struct lio *lio, int state_flag)
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{
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return atomic_read(&lio->ifstate) & state_flag;
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}
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/**
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* \brief set interface state
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* @param lio per-network private data
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* @param state_flag flag state to set
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*/
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static inline void ifstate_set(struct lio *lio, int state_flag)
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{
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atomic_set(&lio->ifstate, (atomic_read(&lio->ifstate) | state_flag));
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}
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/**
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* \brief clear interface state
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* @param lio per-network private data
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* @param state_flag flag state to clear
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*/
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static inline void ifstate_reset(struct lio *lio, int state_flag)
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{
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atomic_set(&lio->ifstate, (atomic_read(&lio->ifstate) & ~(state_flag)));
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}
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/**
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* \brief wait for all pending requests to complete
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* @param oct Pointer to Octeon device
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*
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* Called during shutdown sequence
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*/
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static inline int wait_for_pending_requests(struct octeon_device *oct)
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{
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int i, pcount = 0;
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for (i = 0; i < MAX_IO_PENDING_PKT_COUNT; i++) {
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pcount = atomic_read(
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&oct->response_list[OCTEON_ORDERED_SC_LIST]
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.pending_req_count);
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if (pcount)
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schedule_timeout_uninterruptible(HZ / 10);
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else
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break;
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}
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if (pcount)
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return 1;
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return 0;
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}
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/**
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* \brief Stop Tx queues
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* @param netdev network device
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*/
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static inline void stop_txqs(struct net_device *netdev)
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{
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int i;
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for (i = 0; i < netdev->real_num_tx_queues; i++)
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netif_stop_subqueue(netdev, i);
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}
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/**
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* \brief Wake Tx queues
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* @param netdev network device
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*/
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static inline void wake_txqs(struct net_device *netdev)
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{
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struct lio *lio = GET_LIO(netdev);
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int i, qno;
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for (i = 0; i < netdev->real_num_tx_queues; i++) {
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qno = lio->linfo.txpciq[i % lio->oct_dev->num_iqs].s.q_no;
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if (__netif_subqueue_stopped(netdev, i)) {
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INCR_INSTRQUEUE_PKT_COUNT(lio->oct_dev, qno,
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tx_restart, 1);
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netif_wake_subqueue(netdev, i);
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}
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}
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}
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/**
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* \brief Start Tx queues
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* @param netdev network device
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*/
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static inline void start_txqs(struct net_device *netdev)
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{
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struct lio *lio = GET_LIO(netdev);
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int i;
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if (lio->linfo.link.s.link_up) {
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for (i = 0; i < netdev->real_num_tx_queues; i++)
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netif_start_subqueue(netdev, i);
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}
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}
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static inline int skb_iq(struct octeon_device *oct, struct sk_buff *skb)
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{
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return skb->queue_mapping % oct->num_iqs;
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}
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/**
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* Remove the node at the head of the list. The list would be empty at
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* the end of this call if there are no more nodes in the list.
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*/
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static inline struct list_head *lio_list_delete_head(struct list_head *root)
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{
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struct list_head *node;
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if (list_empty_careful(root))
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node = NULL;
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else
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node = root->next;
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if (node)
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list_del(node);
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return node;
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}
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#endif
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