LXR linux/arch/um/drivers/vector

   1/* SPDX-License-Identifier: GPL-2.0 */
   2/*
   3 * Copyright (C) 2002 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
   4 */
   5
   6#ifndef __UM_VECTOR_KERN_H
   7#define __UM_VECTOR_KERN_H
   8
   9#include <linux/netdevice.h>
  10#include <linux/platform_device.h>
  11#include <linux/skbuff.h>
  12#include <linux/socket.h>
  13#include <linux/list.h>
  14#include <linux/ctype.h>
  15#include <linux/workqueue.h>
  16#include <linux/interrupt.h>
  17#include "vector_user.h"
  18
  19/* Queue structure specially adapted for multiple enqueue/dequeue
  20 * in a mmsgrecv/mmsgsend context
  21 */
  22
  23/* Dequeue method */
  24
  25#define QUEUE_SENDMSG 0
  26#define QUEUE_SENDMMSG 1
  27
  28#define VECTOR_RX 1
  29#define VECTOR_TX (1 << 1)
  30#define VECTOR_BPF (1 << 2)
  31#define VECTOR_QDISC_BYPASS (1 << 3)
  32#define VECTOR_BPF_FLASH (1 << 4)
  33
  34#define ETH_MAX_PACKET 1500
  35#define ETH_HEADER_OTHER 32 /* just in case someone decides to go mad on QnQ */
  36
  37#define MAX_FILTER_PROG (2 << 16)
  38
  39struct vector_queue {
  40        struct mmsghdr *mmsg_vector;
  41        void **skbuff_vector;
  42         /* backlink to device which owns us */
  43        struct net_device *dev;
  44        spinlock_t head_lock;
  45        spinlock_t tail_lock;
  46        int queue_depth, head, tail, max_depth, max_iov_frags;
  47        short options;
  48};
  49
  50struct vector_estats {
  51        uint64_t rx_queue_max;
  52        uint64_t rx_queue_running_average;
  53        uint64_t tx_queue_max;
  54        uint64_t tx_queue_running_average;
  55        uint64_t rx_encaps_errors;
  56        uint64_t tx_timeout_count;
  57        uint64_t tx_restart_queue;
  58        uint64_t tx_kicks;
  59        uint64_t tx_flow_control_xon;
  60        uint64_t tx_flow_control_xoff;
  61        uint64_t rx_csum_offload_good;
  62        uint64_t rx_csum_offload_errors;
  63        uint64_t sg_ok;
  64        uint64_t sg_linearized;
  65};
  66
  67#define VERIFY_HEADER_NOK -1
  68#define VERIFY_HEADER_OK 0
  69#define VERIFY_CSUM_OK 1
  70
  71struct vector_private {
  72        struct list_head list;
  73        spinlock_t lock;
  74        struct net_device *dev;
  75
  76        int unit;
  77
  78        /* Timeout timer in TX */
  79
  80        struct timer_list tl;
  81
  82        /* Scheduled "remove device" work */
  83        struct work_struct reset_tx;
  84        struct vector_fds *fds;
  85
  86        struct vector_queue *rx_queue;
  87        struct vector_queue *tx_queue;
  88
  89        int rx_irq;
  90        int tx_irq;
  91
  92        struct arglist *parsed;
  93
  94        void *transport_data; /* transport specific params if needed */
  95
  96        int max_packet;
  97        int req_size; /* different from max packet - used for TSO */
  98        int headroom;
  99
 100        int options;
 101
 102        /* remote address if any - some transports will leave this as null */
 103
 104        int header_size;
 105        int rx_header_size;
 106        int coalesce;
 107
 108        void *header_rxbuffer;
 109        void *header_txbuffer;
 110
 111        int (*form_header)(uint8_t *header,
 112                struct sk_buff *skb, struct vector_private *vp);
 113        int (*verify_header)(uint8_t *header,
 114                struct sk_buff *skb, struct vector_private *vp);
 115
 116        spinlock_t stats_lock;
 117
 118        struct tasklet_struct tx_poll;
 119        bool rexmit_scheduled;
 120        bool opened;
 121        bool in_write_poll;
 122        bool in_error;
 123
 124        /* guest allowed to use ethtool flash to load bpf */
 125        bool bpf_via_flash;
 126
 127        /* ethtool stats */
 128
 129        struct vector_estats estats;
 130        struct sock_fprog *bpf;
 131
 132        char user[];
 133};
 134
 135extern int build_transport_data(struct vector_private *vp);
 136
 137#endif
 138