Merge tag 'locking-urgent-2020-08-15' of git://git.kernel.org/pub/scm/linux/kernel...
[linux/fpc-iii.git] / arch / um / drivers / vector_kern.h
blob8fff93a75a927e0d69cd8528ada8d8616ac78151
1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * Copyright (C) 2002 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
4 */
6 #ifndef __UM_VECTOR_KERN_H
7 #define __UM_VECTOR_KERN_H
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"
19 /* Queue structure specially adapted for multiple enqueue/dequeue
20 * in a mmsgrecv/mmsgsend context
23 /* Dequeue method */
25 #define QUEUE_SENDMSG 0
26 #define QUEUE_SENDMMSG 1
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)
34 #define ETH_MAX_PACKET 1500
35 #define ETH_HEADER_OTHER 32 /* just in case someone decides to go mad on QnQ */
37 #define MAX_FILTER_PROG (2 << 16)
39 struct 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;
50 struct 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;
67 #define VERIFY_HEADER_NOK -1
68 #define VERIFY_HEADER_OK 0
69 #define VERIFY_CSUM_OK 1
71 struct vector_private {
72 struct list_head list;
73 spinlock_t lock;
74 struct net_device *dev;
76 int unit;
78 /* Timeout timer in TX */
80 struct timer_list tl;
82 /* Scheduled "remove device" work */
83 struct work_struct reset_tx;
84 struct vector_fds *fds;
86 struct vector_queue *rx_queue;
87 struct vector_queue *tx_queue;
89 int rx_irq;
90 int tx_irq;
92 struct arglist *parsed;
94 void *transport_data; /* transport specific params if needed */
96 int max_packet;
97 int req_size; /* different from max packet - used for TSO */
98 int headroom;
100 int options;
102 /* remote address if any - some transports will leave this as null */
104 int header_size;
105 int rx_header_size;
106 int coalesce;
108 void *header_rxbuffer;
109 void *header_txbuffer;
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);
116 spinlock_t stats_lock;
118 struct tasklet_struct tx_poll;
119 bool rexmit_scheduled;
120 bool opened;
121 bool in_write_poll;
122 bool in_error;
124 /* guest allowed to use ethtool flash to load bpf */
125 bool bpf_via_flash;
127 /* ethtool stats */
129 struct vector_estats estats;
130 struct sock_fprog *bpf;
132 char user[];
135 extern int build_transport_data(struct vector_private *vp);
137 #endif