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;
22 } ssvm_eth_input_trace_t;
24 /* packet trace format function */
25 static u8 * format_ssvm_eth_input_trace (u8 * s, va_list * args)
27 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
28 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
29 ssvm_eth_input_trace_t * t = va_arg (*args, ssvm_eth_input_trace_t *);
31 s = format (s, "SSVM_ETH_INPUT: sw_if_index %d, next index %d",
32 t->sw_if_index, t->next_index);
36 vlib_node_registration_t ssvm_eth_input_node;
38 #define foreach_ssvm_eth_input_error \
39 _(NO_BUFFERS, "Rx packet drops (no buffers)")
42 #define _(sym,str) SSVM_ETH_INPUT_ERROR_##sym,
43 foreach_ssvm_eth_input_error
45 SSVM_ETH_INPUT_N_ERROR,
46 } ssvm_eth_input_error_t;
48 static char * ssvm_eth_input_error_strings[] = {
49 #define _(sym,string) string,
50 foreach_ssvm_eth_input_error
55 SSVM_ETH_INPUT_NEXT_DROP,
56 SSVM_ETH_INPUT_NEXT_ETHERNET_INPUT,
57 SSVM_ETH_INPUT_NEXT_IP4_INPUT,
58 SSVM_ETH_INPUT_NEXT_IP6_INPUT,
59 SSVM_ETH_INPUT_NEXT_MPLS_INPUT,
60 SSVM_ETH_INPUT_N_NEXT,
61 } ssvm_eth_input_next_t;
64 ssvm_eth_device_input (ssvm_eth_main_t * em,
65 ssvm_private_t * intfc,
66 vlib_node_runtime_t * node)
68 ssvm_shared_header_t * sh = intfc->sh;
69 vlib_main_t * vm = em->vlib_main;
70 unix_shared_memory_queue_t * q;
71 ssvm_eth_queue_elt_t * elt, * elts;
73 u32 my_pid = intfc->my_pid;
75 u32 n_to_alloc = VLIB_FRAME_SIZE * 2;
76 u32 n_allocated, n_present_in_cache;
78 u32 next_index = DPDK_RX_NEXT_ETHERNET_INPUT;
82 vlib_buffer_free_list_t * fl;
83 u32 n_left_to_next, * to_next;
88 vlib_buffer_t * b0, * prev;
89 u32 saved_cache_size = 0;
90 ethernet_header_t * eh0;
92 u32 n_rx_bytes = 0, l3_offset0;
93 u32 cpu_index = os_get_cpu_number();
94 u32 trace_cnt __attribute__((unused)) = vlib_get_trace_count (vm, node);
97 uword n_trace = vlib_get_trace_count (vm, node);
99 /* Either side down? buh-bye... */
100 if (pointer_to_uword(sh->opaque [MASTER_ADMIN_STATE_INDEX]) == 0 ||
101 pointer_to_uword(sh->opaque [SLAVE_ADMIN_STATE_INDEX]) == 0)
104 if (intfc->i_am_master)
105 q = (unix_shared_memory_queue_t *)(sh->opaque [TO_MASTER_Q_INDEX]);
107 q = (unix_shared_memory_queue_t *)(sh->opaque [TO_SLAVE_Q_INDEX]);
113 fl = vlib_buffer_get_free_list (vm, VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
115 vec_reset_length (intfc->rx_queue);
118 while (__sync_lock_test_and_set (lock, 1))
120 while (q->cursize > 0)
122 unix_shared_memory_queue_sub_raw (q, (u8 *)&elt_index);
123 ASSERT(elt_index < 2048);
124 vec_add1 (intfc->rx_queue, elt_index);
126 CLIB_MEMORY_BARRIER();
129 n_present_in_cache = vec_len (em->buffer_cache);
131 if (vec_len (em->buffer_cache) < vec_len (intfc->rx_queue) * 2)
133 vec_validate (em->buffer_cache,
134 n_to_alloc + vec_len (em->buffer_cache) - 1);
136 vlib_buffer_alloc (vm, &em->buffer_cache [n_present_in_cache],
139 n_present_in_cache += n_allocated;
140 _vec_len (em->buffer_cache) = n_present_in_cache;
143 elts = (ssvm_eth_queue_elt_t *) (sh->opaque [CHUNK_POOL_INDEX]);
145 n_buffers = vec_len (intfc->rx_queue);
148 while (n_buffers > 0)
150 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
152 while (n_buffers > 0 && n_left_to_next > 0)
154 elt = elts + intfc->rx_queue[rx_queue_index];
156 saved_cache_size = n_present_in_cache;
157 if (PREDICT_FALSE(saved_cache_size == 0))
159 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
162 saved_bi0 = bi0 = em->buffer_cache [--n_present_in_cache];
163 b0 = vlib_get_buffer (vm, bi0);
168 vlib_buffer_init_for_free_list (b0, fl);
171 b0->current_data = elt->current_data_hint;
172 b0->current_length = elt->length_this_buffer;
173 b0->total_length_not_including_first_buffer =
174 elt->total_length_not_including_first_buffer;
176 clib_memcpy (b0->data + b0->current_data, elt->data,
179 if (PREDICT_FALSE(prev != 0))
180 prev->next_buffer = bi0;
182 if (PREDICT_FALSE(elt->flags & SSVM_BUFFER_NEXT_PRESENT))
185 if (PREDICT_FALSE(n_present_in_cache == 0))
187 vlib_put_next_frame (vm, node, next_index,
191 bi0 = em->buffer_cache [--n_present_in_cache];
192 b0 = vlib_get_buffer (vm, bi0);
198 saved_cache_size = n_present_in_cache;
200 to_next[0] = saved_bi0;
204 b0 = vlib_get_buffer (vm, saved_bi0);
205 eh0 = vlib_buffer_get_current (b0);
207 type0 = clib_net_to_host_u16 (eh0->type);
209 next0 = SSVM_ETH_INPUT_NEXT_ETHERNET_INPUT;
211 if (type0 == ETHERNET_TYPE_IP4)
212 next0 = SSVM_ETH_INPUT_NEXT_IP4_INPUT;
213 else if (type0 == ETHERNET_TYPE_IP6)
214 next0 = SSVM_ETH_INPUT_NEXT_IP6_INPUT;
215 else if (type0 == ETHERNET_TYPE_MPLS_UNICAST)
216 next0 = SSVM_ETH_INPUT_NEXT_MPLS_INPUT;
218 l3_offset0 = ((next0 == SSVM_ETH_INPUT_NEXT_IP4_INPUT ||
219 next0 == SSVM_ETH_INPUT_NEXT_IP6_INPUT ||
220 next0 == SSVM_ETH_INPUT_NEXT_MPLS_INPUT) ?
221 sizeof (ethernet_header_t) : 0);
223 n_rx_bytes += b0->current_length
224 + b0->total_length_not_including_first_buffer;
226 b0->current_data += l3_offset0;
227 b0->current_length -= l3_offset0;
228 b0->flags = VLIB_BUFFER_TOTAL_LENGTH_VALID;
230 vnet_buffer(b0)->sw_if_index[VLIB_RX] = intfc->vlib_hw_if_index;
231 vnet_buffer(b0)->sw_if_index[VLIB_TX] = (u32)~0;
234 * Turn this on if you run into
235 * "bad monkey" contexts, and you want to know exactly
236 * which nodes they've visited... See main.c...
238 VLIB_BUFFER_TRACE_TRAJECTORY_INIT(b0);
240 if (PREDICT_FALSE(n_trace > 0))
242 ssvm_eth_input_trace_t *tr;
244 vlib_trace_buffer (vm, node, next0,
245 b0, /* follow_chain */ 1);
246 vlib_set_trace_count (vm, node, --n_trace);
248 tr = vlib_add_trace (vm, node, b0, sizeof (*tr));
250 tr->next_index = next0;
251 tr->sw_if_index = intfc->vlib_hw_if_index;
254 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
255 to_next, n_left_to_next,
261 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
265 if (em->buffer_cache)
266 _vec_len (em->buffer_cache) = saved_cache_size;
268 ASSERT (saved_cache_size == 0);
270 ssvm_lock (sh, my_pid, 2);
272 ASSERT(vec_len(intfc->rx_queue) > 0);
274 n_available = (u32)pointer_to_uword(sh->opaque[CHUNK_POOL_NFREE]);
275 elt_indices = (u32 *)(sh->opaque[CHUNK_POOL_FREELIST_INDEX]);
277 clib_memcpy (&elt_indices[n_available], intfc->rx_queue,
278 vec_len (intfc->rx_queue) * sizeof (u32));
280 n_available += vec_len (intfc->rx_queue);
281 sh->opaque[CHUNK_POOL_NFREE] = uword_to_pointer(n_available, void* );
285 vlib_error_count (vm, node->node_index, SSVM_ETH_INPUT_ERROR_NO_BUFFERS,
288 vlib_increment_combined_counter
289 (vnet_get_main()->interface_main.combined_sw_if_counters
290 + VNET_INTERFACE_COUNTER_RX, cpu_index,
291 intfc->vlib_hw_if_index,
292 rx_queue_index, n_rx_bytes);
294 return rx_queue_index;
298 ssvm_eth_input_node_fn (vlib_main_t * vm,
299 vlib_node_runtime_t * node,
300 vlib_frame_t * frame)
302 ssvm_eth_main_t * em = &ssvm_eth_main;
303 ssvm_private_t * intfc;
304 uword n_rx_packets = 0;
306 vec_foreach (intfc, em->intfcs)
308 n_rx_packets += ssvm_eth_device_input (em, intfc, node);
314 VLIB_REGISTER_NODE (ssvm_eth_input_node) = {
315 .function = ssvm_eth_input_node_fn,
316 .name = "ssvm_eth_input",
317 .vector_size = sizeof (u32),
318 .format_trace = format_ssvm_eth_input_trace,
319 .type = VLIB_NODE_TYPE_INPUT,
320 .state = VLIB_NODE_STATE_DISABLED,
322 .n_errors = ARRAY_LEN(ssvm_eth_input_error_strings),
323 .error_strings = ssvm_eth_input_error_strings,
325 .n_next_nodes = SSVM_ETH_INPUT_N_NEXT,
327 /* edit / add dispositions here */
329 [SSVM_ETH_INPUT_NEXT_DROP] = "error-drop",
330 [SSVM_ETH_INPUT_NEXT_ETHERNET_INPUT] = "ethernet-input",
331 [SSVM_ETH_INPUT_NEXT_IP4_INPUT] = "ip4-input",
332 [SSVM_ETH_INPUT_NEXT_IP6_INPUT] = "ip6-input",
333 [SSVM_ETH_INPUT_NEXT_MPLS_INPUT] = "mpls-gre-input",