2 *------------------------------------------------------------------
3 * Copyright (c) 2016 Cisco and/or its affiliates.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at:
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 *------------------------------------------------------------------
20 #include <sys/ioctl.h>
21 #include <sys/types.h>
23 #include <vnet/devices/netmap/net_netmap.h>
25 #include <vlib/vlib.h>
26 #include <vlib/unix/unix.h>
27 #include <vnet/ethernet/ethernet.h>
28 #include <vnet/devices/netmap/netmap.h>
30 netmap_main_t netmap_main;
33 netmap_eth_flag_change (vnet_main_t * vnm, vnet_hw_interface_t * hi,
41 netmap_fd_read_ready (clib_file_t * uf)
43 vlib_main_t *vm = vlib_get_main ();
44 netmap_main_t *nm = &netmap_main;
45 u32 idx = uf->private_data;
47 nm->pending_input_bitmap =
48 clib_bitmap_set (nm->pending_input_bitmap, idx, 1);
50 /* Schedule the rx node */
51 vlib_node_set_interrupt_pending (vm, netmap_input_node.index);
57 close_netmap_if (netmap_main_t * nm, netmap_if_t * nif)
59 if (nif->clib_file_index != ~0)
61 clib_file_del (&file_main, file_main.file_pool + nif->clib_file_index);
62 nif->clib_file_index = ~0;
64 else if (nif->fd > -1)
69 netmap_mem_region_t *reg = &nm->mem_regions[nif->mem_region];
70 if (--reg->refcnt == 0)
72 munmap (reg->mem, reg->region_size);
78 mhash_unset (&nm->if_index_by_host_if_name, nif->host_if_name,
80 vec_free (nif->host_if_name);
83 clib_memset (nif, 0, sizeof (*nif));
84 pool_put (nm->interfaces, nif);
88 netmap_worker_thread_enable ()
90 /* if worker threads are enabled, switch to polling mode */
93 vlib_node_set_state (this_vlib_main,
94 netmap_input_node.index,
95 VLIB_NODE_STATE_POLLING);
102 netmap_worker_thread_disable ()
106 vlib_node_set_state (this_vlib_main,
107 netmap_input_node.index,
108 VLIB_NODE_STATE_INTERRUPT);
115 netmap_create_if (vlib_main_t * vm, u8 * if_name, u8 * hw_addr_set,
116 u8 is_pipe, u8 is_master, u32 * sw_if_index)
118 netmap_main_t *nm = &netmap_main;
120 netmap_if_t *nif = 0;
122 clib_error_t *error = 0;
123 vnet_sw_interface_t *sw;
124 vnet_main_t *vnm = vnet_get_main ();
126 struct nmreq *req = 0;
127 netmap_mem_region_t *reg;
128 vlib_thread_main_t *tm = vlib_get_thread_main ();
131 p = mhash_get (&nm->if_index_by_host_if_name, if_name);
133 return VNET_API_ERROR_SUBIF_ALREADY_EXISTS;
135 fd = open ("/dev/netmap", O_RDWR);
137 return VNET_API_ERROR_SUBIF_ALREADY_EXISTS;
139 pool_get (nm->interfaces, nif);
140 nif->if_index = nif - nm->interfaces;
142 nif->clib_file_index = ~0;
144 vec_validate (req, 0);
146 req->nr_version = NETMAP_API;
147 req->nr_flags = NR_REG_ALL_NIC;
150 req->nr_flags = is_master ? NR_REG_PIPE_MASTER : NR_REG_PIPE_SLAVE;
152 req->nr_flags = NR_REG_ALL_NIC;
154 req->nr_flags |= NR_ACCEPT_VNET_HDR;
155 snprintf (req->nr_name, IFNAMSIZ, "%s", if_name);
156 req->nr_name[IFNAMSIZ - 1] = 0;
158 if (ioctl (nif->fd, NIOCREGIF, req))
160 ret = VNET_API_ERROR_NOT_CONNECTED;
164 nif->mem_region = req->nr_arg2;
165 vec_validate (nm->mem_regions, nif->mem_region);
166 reg = &nm->mem_regions[nif->mem_region];
167 if (reg->region_size == 0)
169 reg->mem = mmap (NULL, req->nr_memsize, PROT_READ | PROT_WRITE,
171 clib_warning ("mem %p", reg->mem);
172 if (reg->mem == MAP_FAILED)
174 ret = VNET_API_ERROR_NOT_CONNECTED;
177 reg->region_size = req->nr_memsize;
181 nif->nifp = NETMAP_IF (reg->mem, req->nr_offset);
182 nif->first_rx_ring = 0;
183 nif->last_rx_ring = 0;
184 nif->first_tx_ring = 0;
185 nif->last_tx_ring = 0;
186 nif->host_if_name = if_name;
187 nif->per_interface_next_index = ~0;
189 if (tm->n_vlib_mains > 1)
190 clib_spinlock_init (&nif->lockp);
193 clib_file_t template = { 0 };
194 template.read_function = netmap_fd_read_ready;
195 template.file_descriptor = nif->fd;
196 template.private_data = nif->if_index;
197 nif->clib_file_index = clib_file_add (&file_main, &template);
200 /*use configured or generate random MAC address */
202 memcpy (hw_addr, hw_addr_set, 6);
205 f64 now = vlib_time_now (vm);
207 rnd = (u32) (now * 1e6);
208 rnd = random_u32 (&rnd);
210 memcpy (hw_addr + 2, &rnd, sizeof (rnd));
215 error = ethernet_register_interface (vnm, netmap_device_class.index,
216 nif->if_index, hw_addr,
218 netmap_eth_flag_change);
222 clib_error_report (error);
223 ret = VNET_API_ERROR_SYSCALL_ERROR_1;
227 sw = vnet_get_hw_sw_interface (vnm, nif->hw_if_index);
228 nif->sw_if_index = sw->sw_if_index;
230 mhash_set_mem (&nm->if_index_by_host_if_name, if_name, &nif->if_index, 0);
233 *sw_if_index = nif->sw_if_index;
235 if (tm->n_vlib_mains > 1 && pool_elts (nm->interfaces) == 1)
236 netmap_worker_thread_enable ();
241 close_netmap_if (nm, nif);
246 netmap_delete_if (vlib_main_t * vm, u8 * host_if_name)
248 vnet_main_t *vnm = vnet_get_main ();
249 netmap_main_t *nm = &netmap_main;
252 vlib_thread_main_t *tm = vlib_get_thread_main ();
254 p = mhash_get (&nm->if_index_by_host_if_name, host_if_name);
257 clib_warning ("Host interface %s does not exist", host_if_name);
258 return VNET_API_ERROR_SYSCALL_ERROR_1;
260 nif = pool_elt_at_index (nm->interfaces, p[0]);
262 /* bring down the interface */
263 vnet_hw_interface_set_flags (vnm, nif->hw_if_index, 0);
265 ethernet_delete_interface (vnm, nif->hw_if_index);
267 close_netmap_if (nm, nif);
269 if (tm->n_vlib_mains > 1 && pool_elts (nm->interfaces) == 0)
270 netmap_worker_thread_disable ();
275 static clib_error_t *
276 netmap_init (vlib_main_t * vm)
278 netmap_main_t *nm = &netmap_main;
279 vlib_thread_main_t *tm = vlib_get_thread_main ();
280 vlib_thread_registration_t *tr;
283 clib_memset (nm, 0, sizeof (netmap_main_t));
285 nm->input_cpu_first_index = 0;
286 nm->input_cpu_count = 1;
288 /* find out which cpus will be used for input */
289 p = hash_get_mem (tm->thread_registrations_by_name, "workers");
290 tr = p ? (vlib_thread_registration_t *) p[0] : 0;
292 if (tr && tr->count > 0)
294 nm->input_cpu_first_index = tr->first_index;
295 nm->input_cpu_count = tr->count;
298 mhash_init_vec_string (&nm->if_index_by_host_if_name, sizeof (uword));
300 vec_validate_aligned (nm->rx_buffers, tm->n_vlib_mains - 1,
301 CLIB_CACHE_LINE_BYTES);
306 VLIB_INIT_FUNCTION (netmap_init);
309 * fd.io coding-style-patch-verification: ON
312 * eval: (c-set-style "gnu")