FD.io VPP  v20.09-64-g4f7b92f0a
Vector Packet Processing
netmap.h
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17 /*
18  * Copyright (C) 2011-2014 Universita` di Pisa. All rights reserved.
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42 
43 #include <vppinfra/lock.h>
44 
45 typedef struct
46 {
47  CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
54 
57 
58  /* netmap */
59  struct nmreq *req;
61  int fd;
62  struct netmap_if *nifp;
67 
68 } netmap_if_t;
69 
70 typedef struct
71 {
72  char *mem;
74  int refcnt;
76 
77 typedef struct
78 {
79  CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
81 
82  /* bitmap of pending rx interfaces */
84 
85  /* rx buffer cache */
87 
88  /* hash of host interface names */
90 
91  /* vector of memory regions */
93 
94  /* first cpu index */
96 
97  /* total cpu count */
100 
104 
105 int netmap_create_if (vlib_main_t * vm, u8 * host_if_name, u8 * hw_addr_set,
106  u8 is_pipe, u8 is_master, u32 * sw_if_index);
107 int netmap_delete_if (vlib_main_t * vm, u8 * host_if_name);
108 
109 
110 /* Macros and helper functions from sys/net/netmap_user.h */
111 
112 #ifdef _NET_NETMAP_H_
113 
114 #define _NETMAP_OFFSET(type, ptr, offset) \
115  ((type)(void *)((char *)(ptr) + (offset)))
116 
117 #define NETMAP_IF(_base, _ofs) _NETMAP_OFFSET(struct netmap_if *, _base, _ofs)
118 
119 #define NETMAP_TXRING(nifp, index) _NETMAP_OFFSET(struct netmap_ring *, \
120  nifp, (nifp)->ring_ofs[index] )
121 
122 #define NETMAP_RXRING(nifp, index) _NETMAP_OFFSET(struct netmap_ring *, \
123  nifp, (nifp)->ring_ofs[index + (nifp)->ni_tx_rings + 1] )
124 
125 #define NETMAP_BUF(ring, index) \
126  ((char *)(ring) + (ring)->buf_ofs + ((index)*(ring)->nr_buf_size))
127 
128 #define NETMAP_BUF_IDX(ring, buf) \
129  ( ((char *)(buf) - ((char *)(ring) + (ring)->buf_ofs) ) / \
130  (ring)->nr_buf_size )
131 
132 static inline uint32_t
133 nm_ring_next (struct netmap_ring *ring, uint32_t i)
134 {
135  return (PREDICT_FALSE (i + 1 == ring->num_slots) ? 0 : i + 1);
136 }
137 
138 
139 /*
140  * Return 1 if we have pending transmissions in the tx ring.
141  * When everything is complete ring->head = ring->tail + 1 (modulo ring size)
142  */
143 static inline int
144 nm_tx_pending (struct netmap_ring *ring)
145 {
146  return nm_ring_next (ring, ring->tail) != ring->head;
147 }
148 
149 static inline uint32_t
150 nm_ring_space (struct netmap_ring *ring)
151 {
152  int ret = ring->tail - ring->cur;
153  if (ret < 0)
154  ret += ring->num_slots;
155  return ret;
156 }
157 #endif
158 
159 
160 /*
161  * fd.io coding-style-patch-verification: ON
162  *
163  * Local Variables:
164  * eval: (c-set-style "gnu")
165  * End:
166  */
const uint32_t num_slots
Definition: net_netmap.h:266
Definition: mhash.h:46
#define CLIB_CACHE_LINE_ALIGN_MARK(mark)
Definition: cache.h:60
netmap_if_t * interfaces
Definition: netmap.h:80
uint32_t cur
Definition: net_netmap.h:272
vlib_main_t * vm
Definition: in2out_ed.c:1582
int netmap_delete_if(vlib_main_t *vm, u8 *host_if_name)
Definition: netmap.c:246
struct _vnet_device_class vnet_device_class_t
unsigned char u8
Definition: types.h:56
u32 sw_if_index
Definition: netmap.h:52
int netmap_create_if(vlib_main_t *vm, u8 *host_if_name, u8 *hw_addr_set, u8 is_pipe, u8 is_master, u32 *sw_if_index)
Definition: netmap.c:115
u32 per_interface_next_index
Definition: netmap.h:55
u32 input_cpu_count
Definition: netmap.h:98
unsigned int u32
Definition: types.h:88
struct netmap_if * nifp
Definition: netmap.h:62
struct nmreq * req
Definition: netmap.h:59
netmap_mem_region_t * mem_regions
Definition: netmap.h:92
unsigned short u16
Definition: types.h:57
u32 clib_file_index
Definition: netmap.h:53
#define PREDICT_FALSE(x)
Definition: clib.h:120
u16 first_rx_ring
Definition: netmap.h:65
mhash_t if_index_by_host_if_name
Definition: netmap.h:89
int fd
Definition: netmap.h:61
uint32_t head
Definition: net_netmap.h:271
u16 first_tx_ring
Definition: netmap.h:63
u32 hw_if_index
Definition: netmap.h:51
u16 last_rx_ring
Definition: netmap.h:66
uint32_t tail
Definition: net_netmap.h:273
u16 last_tx_ring
Definition: netmap.h:64
uword if_index
Definition: netmap.h:50
netmap_main_t netmap_main
Definition: netmap.c:30
vlib_node_registration_t netmap_input_node
(constructor) VLIB_REGISTER_NODE (netmap_input_node)
Definition: node.c:278
u16 mem_region
Definition: netmap.h:60
clib_spinlock_t lockp
Definition: netmap.h:48
u8 * host_if_name
Definition: netmap.h:49
struct _vlib_node_registration vlib_node_registration_t
u32 input_cpu_first_index
Definition: netmap.h:95
u8 is_admin_up
Definition: netmap.h:56
vnet_device_class_t netmap_device_class
u64 uword
Definition: types.h:112
uword * pending_input_bitmap
Definition: netmap.h:83
u32 ** rx_buffers
Definition: netmap.h:86
vl_api_interface_index_t sw_if_index
Definition: wireguard.api:33