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