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>
22 #include <vlib/vlib.h>
23 #include <vlib/unix/unix.h>
24 #include <vnet/ethernet/ethernet.h>
26 #include <vnet/devices/netmap/net_netmap.h>
27 #include <vnet/devices/netmap/netmap.h>
29 #define foreach_netmap_tx_func_error \
30 _(NO_FREE_SLOTS, "no free tx slots") \
31 _(PENDING_MSGS, "pending msgs in tx ring")
35 #define _(f,s) NETMAP_TX_ERROR_##f,
36 foreach_netmap_tx_func_error
39 } netmap_tx_func_error_t;
41 static char *netmap_tx_func_error_strings[] = {
43 foreach_netmap_tx_func_error
49 format_netmap_device_name (u8 * s, va_list * args)
51 u32 i = va_arg (*args, u32);
52 netmap_main_t *apm = &netmap_main;
53 netmap_if_t *nif = pool_elt_at_index (apm->interfaces, i);
55 s = format (s, "netmap-%s", nif->host_if_name);
60 format_netmap_device (u8 * s, va_list * args)
62 u32 dev_instance = va_arg (*args, u32);
63 int verbose = va_arg (*args, int);
64 netmap_main_t *nm = &netmap_main;
65 netmap_if_t *nif = vec_elt_at_index (nm->interfaces, dev_instance);
66 uword indent = format_get_indent (s);
68 s = format (s, "NETMAP interface");
71 s = format (s, "\n%U version %d flags 0x%x"
72 "\n%U region %u memsize 0x%x offset 0x%x"
73 "\n%U tx_slots %u rx_slots %u tx_rings %u rx_rings %u",
74 format_white_space, indent + 2,
77 format_white_space, indent + 2,
81 format_white_space, indent + 2,
82 nif->req->nr_tx_slots,
83 nif->req->nr_rx_slots,
84 nif->req->nr_tx_rings, nif->req->nr_rx_rings);
90 format_netmap_tx_trace (u8 * s, va_list * args)
92 s = format (s, "Unimplemented...");
97 netmap_interface_tx (vlib_main_t * vm,
98 vlib_node_runtime_t * node, vlib_frame_t * frame)
100 netmap_main_t *nm = &netmap_main;
101 u32 *buffers = vlib_frame_args (frame);
102 u32 n_left = frame->n_vectors;
103 f64 const time_constant = 1e3;
104 vnet_interface_output_runtime_t *rd = (void *) node->runtime_data;
105 netmap_if_t *nif = pool_elt_at_index (nm->interfaces, rd->dev_instance);
108 if (PREDICT_FALSE (nif->lockp != 0))
110 while (__sync_lock_test_and_set (nif->lockp, 1))
114 cur_ring = nif->first_tx_ring;
116 while (n_left && cur_ring <= nif->last_tx_ring)
118 struct netmap_ring *ring = NETMAP_TXRING (nif->nifp, cur_ring);
119 int n_free_slots = nm_ring_space (ring);
120 uint cur = ring->cur;
122 if (nm_tx_pending (ring))
124 if (ioctl (nif->fd, NIOCTXSYNC, NULL) < 0)
125 clib_unix_warning ("NIOCTXSYNC");
126 clib_cpu_time_wait (time_constant);
128 if (nm_tx_pending (ring) && !n_free_slots)
135 while (n_left && n_free_slots)
137 vlib_buffer_t *b0 = 0;
143 struct netmap_slot *slot = &ring->slot[cur];
147 b0 = vlib_get_buffer (vm, bi);
148 len = b0->current_length;
150 clib_memcpy ((u8 *) NETMAP_BUF (ring, slot->buf_idx) + offset,
151 vlib_buffer_get_current (b0), len);
154 while ((bi = b0->next_buffer));
157 cur = (cur + 1) % ring->num_slots;
161 CLIB_MEMORY_BARRIER ();
162 ring->head = ring->cur = cur;
165 if (n_left < frame->n_vectors)
166 ioctl (nif->fd, NIOCTXSYNC, NULL);
168 if (PREDICT_FALSE (nif->lockp != 0))
172 vlib_error_count (vm, node->node_index,
174 frame->n_vectors ? NETMAP_TX_ERROR_PENDING_MSGS :
175 NETMAP_TX_ERROR_NO_FREE_SLOTS), n_left);
177 vlib_buffer_free (vm, vlib_frame_args (frame), frame->n_vectors);
178 return frame->n_vectors;
182 netmap_set_interface_next_node (vnet_main_t * vnm, u32 hw_if_index,
185 netmap_main_t *apm = &netmap_main;
186 vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
187 netmap_if_t *nif = pool_elt_at_index (apm->interfaces, hw->dev_instance);
189 /* Shut off redirection */
190 if (node_index == ~0)
192 nif->per_interface_next_index = node_index;
196 nif->per_interface_next_index =
197 vlib_node_add_next (vlib_get_main (), netmap_input_node.index,
202 netmap_clear_hw_interface_counters (u32 instance)
204 /* Nothing for now */
207 static clib_error_t *
208 netmap_interface_admin_up_down (vnet_main_t * vnm, u32 hw_if_index, u32 flags)
210 netmap_main_t *apm = &netmap_main;
211 vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
212 netmap_if_t *nif = pool_elt_at_index (apm->interfaces, hw->dev_instance);
215 nif->is_admin_up = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) != 0;
217 if (nif->is_admin_up)
218 hw_flags = VNET_HW_INTERFACE_FLAG_LINK_UP;
222 vnet_hw_interface_set_flags (vnm, hw_if_index, hw_flags);
227 static clib_error_t *
228 netmap_subif_add_del_function (vnet_main_t * vnm,
230 struct vnet_sw_interface_t *st, int is_add)
232 /* Nothing for now */
237 VNET_DEVICE_CLASS (netmap_device_class) = {
239 .tx_function = netmap_interface_tx,
240 .format_device_name = format_netmap_device_name,
241 .format_device = format_netmap_device,
242 .format_tx_trace = format_netmap_tx_trace,
243 .tx_function_n_errors = NETMAP_TX_N_ERROR,
244 .tx_function_error_strings = netmap_tx_func_error_strings,
245 .rx_redirect_to_node = netmap_set_interface_next_node,
246 .clear_counters = netmap_clear_hw_interface_counters,
247 .admin_up_down_function = netmap_interface_admin_up_down,
248 .subif_add_del_function = netmap_subif_add_del_function,
249 .no_flatten_output_chains = 1,
252 VLIB_DEVICE_TX_FUNCTION_MULTIARCH(netmap_device_class,
257 * fd.io coding-style-patch-verification: ON
260 * eval: (c-set-style "gnu")