2 * Copyright (c) 2015 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
17 vlib_node_registration_t ssvm_eth_input_node;
23 } ssvm_eth_input_trace_t;
25 /* packet trace format function */
27 format_ssvm_eth_input_trace (u8 * s, va_list * args)
29 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
30 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
31 ssvm_eth_input_trace_t *t = va_arg (*args, ssvm_eth_input_trace_t *);
33 s = format (s, "SSVM_ETH_INPUT: sw_if_index %d, next index %d",
34 t->sw_if_index, t->next_index);
38 vlib_node_registration_t ssvm_eth_input_node;
40 #define foreach_ssvm_eth_input_error \
41 _(NO_BUFFERS, "Rx packet drops (no buffers)")
45 #define _(sym,str) SSVM_ETH_INPUT_ERROR_##sym,
46 foreach_ssvm_eth_input_error
48 SSVM_ETH_INPUT_N_ERROR,
49 } ssvm_eth_input_error_t;
51 static char *ssvm_eth_input_error_strings[] = {
52 #define _(sym,string) string,
53 foreach_ssvm_eth_input_error
59 SSVM_ETH_INPUT_NEXT_DROP,
60 SSVM_ETH_INPUT_NEXT_ETHERNET_INPUT,
61 SSVM_ETH_INPUT_NEXT_IP4_INPUT,
62 SSVM_ETH_INPUT_NEXT_IP6_INPUT,
63 SSVM_ETH_INPUT_NEXT_MPLS_INPUT,
64 SSVM_ETH_INPUT_N_NEXT,
65 } ssvm_eth_input_next_t;
68 ssvm_eth_device_input (ssvm_eth_main_t * em,
69 ssvm_private_t * intfc, vlib_node_runtime_t * node)
71 ssvm_shared_header_t *sh = intfc->sh;
72 vlib_main_t *vm = em->vlib_main;
73 unix_shared_memory_queue_t *q;
74 ssvm_eth_queue_elt_t *elt, *elts;
76 u32 my_pid = intfc->my_pid;
78 u32 n_to_alloc = VLIB_FRAME_SIZE * 2;
79 u32 n_allocated, n_present_in_cache;
80 u32 next_index = VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT;
81 vlib_buffer_free_list_t *fl;
82 u32 n_left_to_next, *to_next;
87 vlib_buffer_t *b0, *prev;
88 u32 saved_cache_size = 0;
89 ethernet_header_t *eh0;
91 u32 n_rx_bytes = 0, l3_offset0;
92 u32 thread_index = vlib_get_thread_index ();
93 u32 trace_cnt __attribute__ ((unused)) = vlib_get_trace_count (vm, node);
96 uword n_trace = vlib_get_trace_count (vm, node);
98 /* Either side down? buh-bye... */
99 if (pointer_to_uword (sh->opaque[MASTER_ADMIN_STATE_INDEX]) == 0 ||
100 pointer_to_uword (sh->opaque[SLAVE_ADMIN_STATE_INDEX]) == 0)
103 if (intfc->i_am_master)
104 q = (unix_shared_memory_queue_t *) (sh->opaque[TO_MASTER_Q_INDEX]);
106 q = (unix_shared_memory_queue_t *) (sh->opaque[TO_SLAVE_Q_INDEX]);
112 fl = vlib_buffer_get_free_list (vm, VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
114 vec_reset_length (intfc->rx_queue);
117 while (__sync_lock_test_and_set (lock, 1))
119 while (q->cursize > 0)
121 unix_shared_memory_queue_sub_raw (q, (u8 *) & elt_index);
122 ASSERT (elt_index < 2048);
123 vec_add1 (intfc->rx_queue, elt_index);
125 CLIB_MEMORY_BARRIER ();
128 n_present_in_cache = vec_len (em->buffer_cache);
130 if (vec_len (em->buffer_cache) < vec_len (intfc->rx_queue) * 2)
132 vec_validate (em->buffer_cache,
133 n_to_alloc + vec_len (em->buffer_cache) - 1);
135 vlib_buffer_alloc (vm, &em->buffer_cache[n_present_in_cache],
138 n_present_in_cache += n_allocated;
139 _vec_len (em->buffer_cache) = n_present_in_cache;
142 elts = (ssvm_eth_queue_elt_t *) (sh->opaque[CHUNK_POOL_INDEX]);
144 n_buffers = vec_len (intfc->rx_queue);
147 while (n_buffers > 0)
149 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
151 while (n_buffers > 0 && n_left_to_next > 0)
153 elt = elts + intfc->rx_queue[rx_queue_index];
155 saved_cache_size = n_present_in_cache;
156 if (PREDICT_FALSE (saved_cache_size == 0))
158 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
161 saved_bi0 = bi0 = em->buffer_cache[--n_present_in_cache];
162 b0 = vlib_get_buffer (vm, bi0);
167 vlib_buffer_init_for_free_list (b0, fl);
169 b0->current_data = elt->current_data_hint;
170 b0->current_length = elt->length_this_buffer;
171 b0->total_length_not_including_first_buffer =
172 elt->total_length_not_including_first_buffer;
174 clib_memcpy (b0->data + b0->current_data, elt->data,
177 if (PREDICT_FALSE (prev != 0))
178 prev->next_buffer = bi0;
180 if (PREDICT_FALSE (elt->flags & SSVM_BUFFER_NEXT_PRESENT))
183 if (PREDICT_FALSE (n_present_in_cache == 0))
185 vlib_put_next_frame (vm, node, next_index,
189 bi0 = em->buffer_cache[--n_present_in_cache];
190 b0 = vlib_get_buffer (vm, bi0);
196 saved_cache_size = n_present_in_cache;
198 to_next[0] = saved_bi0;
202 b0 = vlib_get_buffer (vm, saved_bi0);
203 eh0 = vlib_buffer_get_current (b0);
205 type0 = clib_net_to_host_u16 (eh0->type);
207 next0 = SSVM_ETH_INPUT_NEXT_ETHERNET_INPUT;
209 if (type0 == ETHERNET_TYPE_IP4)
210 next0 = SSVM_ETH_INPUT_NEXT_IP4_INPUT;
211 else if (type0 == ETHERNET_TYPE_IP6)
212 next0 = SSVM_ETH_INPUT_NEXT_IP6_INPUT;
213 else if (type0 == ETHERNET_TYPE_MPLS)
214 next0 = SSVM_ETH_INPUT_NEXT_MPLS_INPUT;
216 l3_offset0 = ((next0 == SSVM_ETH_INPUT_NEXT_IP4_INPUT ||
217 next0 == SSVM_ETH_INPUT_NEXT_IP6_INPUT ||
218 next0 == SSVM_ETH_INPUT_NEXT_MPLS_INPUT) ?
219 sizeof (ethernet_header_t) : 0);
221 n_rx_bytes += b0->current_length
222 + b0->total_length_not_including_first_buffer;
224 b0->current_data += l3_offset0;
225 b0->current_length -= l3_offset0;
226 b0->flags = VLIB_BUFFER_TOTAL_LENGTH_VALID;
228 vnet_buffer (b0)->sw_if_index[VLIB_RX] = intfc->vlib_hw_if_index;
229 vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
232 * Turn this on if you run into
233 * "bad monkey" contexts, and you want to know exactly
234 * which nodes they've visited... See main.c...
236 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0);
238 if (PREDICT_FALSE (n_trace > 0))
240 ssvm_eth_input_trace_t *tr;
242 vlib_trace_buffer (vm, node, next0, b0, /* follow_chain */ 1);
243 vlib_set_trace_count (vm, node, --n_trace);
245 tr = vlib_add_trace (vm, node, b0, sizeof (*tr));
247 tr->next_index = next0;
248 tr->sw_if_index = intfc->vlib_hw_if_index;
251 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
252 to_next, n_left_to_next,
258 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
262 if (em->buffer_cache)
263 _vec_len (em->buffer_cache) = saved_cache_size;
265 ASSERT (saved_cache_size == 0);
267 ssvm_lock (sh, my_pid, 2);
269 ASSERT (vec_len (intfc->rx_queue) > 0);
271 n_available = (u32) pointer_to_uword (sh->opaque[CHUNK_POOL_NFREE]);
272 elt_indices = (u32 *) (sh->opaque[CHUNK_POOL_FREELIST_INDEX]);
274 clib_memcpy (&elt_indices[n_available], intfc->rx_queue,
275 vec_len (intfc->rx_queue) * sizeof (u32));
277 n_available += vec_len (intfc->rx_queue);
278 sh->opaque[CHUNK_POOL_NFREE] = uword_to_pointer (n_available, void *);
282 vlib_error_count (vm, node->node_index, SSVM_ETH_INPUT_ERROR_NO_BUFFERS,
285 vlib_increment_combined_counter
286 (vnet_get_main ()->interface_main.combined_sw_if_counters
287 + VNET_INTERFACE_COUNTER_RX, thread_index,
288 intfc->vlib_hw_if_index, rx_queue_index, n_rx_bytes);
290 vnet_device_increment_rx_packets (thread_index, rx_queue_index);
292 return rx_queue_index;
296 ssvm_eth_input_node_fn (vlib_main_t * vm,
297 vlib_node_runtime_t * node, vlib_frame_t * frame)
299 ssvm_eth_main_t *em = &ssvm_eth_main;
300 ssvm_private_t *intfc;
301 uword n_rx_packets = 0;
303 vec_foreach (intfc, em->intfcs)
305 n_rx_packets += ssvm_eth_device_input (em, intfc, node);
312 VLIB_REGISTER_NODE (ssvm_eth_input_node) = {
313 .function = ssvm_eth_input_node_fn,
314 .name = "ssvm_eth_input",
315 .vector_size = sizeof (u32),
316 .format_trace = format_ssvm_eth_input_trace,
317 .type = VLIB_NODE_TYPE_INPUT,
318 .state = VLIB_NODE_STATE_DISABLED,
320 .n_errors = ARRAY_LEN(ssvm_eth_input_error_strings),
321 .error_strings = ssvm_eth_input_error_strings,
323 .n_next_nodes = SSVM_ETH_INPUT_N_NEXT,
325 /* edit / add dispositions here */
327 [SSVM_ETH_INPUT_NEXT_DROP] = "error-drop",
328 [SSVM_ETH_INPUT_NEXT_ETHERNET_INPUT] = "ethernet-input",
329 [SSVM_ETH_INPUT_NEXT_IP4_INPUT] = "ip4-input",
330 [SSVM_ETH_INPUT_NEXT_IP6_INPUT] = "ip6-input",
331 [SSVM_ETH_INPUT_NEXT_MPLS_INPUT] = "mpls-input",
335 VLIB_NODE_FUNCTION_MULTIARCH (ssvm_eth_input_node, ssvm_eth_input_node_fn)
340 * fd.io coding-style-patch-verification: ON
343 * eval: (c-set-style "gnu")