2 *------------------------------------------------------------------
3 * Copyright (c) 2018 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 *------------------------------------------------------------------
18 #include <vlib/vlib.h>
19 #include <vlib/unix/unix.h>
20 #include <vlib/pci/pci.h>
21 #include <vnet/ethernet/ethernet.h>
22 #include <vnet/devices/devices.h>
24 #include <vmxnet3/vmxnet3.h>
26 #define foreach_vmxnet3_input_error \
27 _(BUFFER_ALLOC, "buffer alloc error") \
28 _(RX_PACKET_NO_SOP, "Rx packet error - no SOP") \
29 _(RX_PACKET, "Rx packet error") \
30 _(NO_BUFFER, "Rx no buffer error")
34 #define _(f,s) VMXNET3_INPUT_ERROR_##f,
35 foreach_vmxnet3_input_error
37 VMXNET3_INPUT_N_ERROR,
38 } vmxnet3_input_error_t;
40 static __clib_unused char *vmxnet3_input_error_strings[] = {
42 foreach_vmxnet3_input_error
46 static_always_inline u16
47 vmxnet3_find_rid (vmxnet3_device_t * vd, vmxnet3_rx_comp * rx_comp)
51 // rid is bits 16-25 (10 bits number)
52 rid = rx_comp->index & (0xffffffff >> 6);
54 if ((rid >= vd->num_rx_queues) && (rid < (vd->num_rx_queues << 1)))
60 static_always_inline void
61 vmxnet3_rx_comp_ring_advance_next (vmxnet3_rxq_t * rxq)
63 vmxnet3_rx_comp_ring *comp_ring = &rxq->rx_comp_ring;
66 if (PREDICT_FALSE (comp_ring->next == rxq->size))
69 comp_ring->gen ^= VMXNET3_RXCF_GEN;
73 static_always_inline uword
74 vmxnet3_device_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
75 vlib_frame_t * frame, vmxnet3_device_t * vd,
78 vnet_main_t *vnm = vnet_get_main ();
79 uword n_trace = vlib_get_trace_count (vm, node);
80 u32 n_rx_packets = 0, n_rx_bytes = 0;
81 vmxnet3_rx_comp *rx_comp;
85 u32 thread_index = vm->thread_index;
86 u32 buffer_indices[VLIB_FRAME_SIZE], *bi;
87 u16 nexts[VLIB_FRAME_SIZE], *next;
88 vmxnet3_rx_ring *ring;
89 vmxnet3_rx_comp_ring *comp_ring;
91 vlib_buffer_t *prev_b0 = 0, *hb = 0;
92 u32 next_index = VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT;
93 u8 known_next = 0, got_packet = 0;
97 rxq = vec_elt_at_index (vd->rxqs, qid);
98 comp_ring = &rxq->rx_comp_ring;
101 while (PREDICT_TRUE (n_rx_packets < VLIB_FRAME_SIZE) &&
103 (rxq->rx_comp[comp_ring->next].flags & VMXNET3_RXCF_GEN)))
108 comp_idx = comp_ring->next;
109 rx_comp = &rxq->rx_comp[comp_idx];
111 rid = vmxnet3_find_rid (vd, rx_comp);
112 ring = &rxq->rx_ring[rid];
114 if (PREDICT_TRUE (ring->fill >= 1))
118 vlib_error_count (vm, node->node_index,
119 VMXNET3_INPUT_ERROR_NO_BUFFER, 1);
123 vmxnet3_rx_comp_ring_advance_next (rxq);
124 desc_idx = rx_comp->index & VMXNET3_RXC_INDEX;
125 ring->consume = desc_idx;
126 rxd = &rxq->rx_desc[rid][desc_idx];
128 bi0 = ring->bufs[desc_idx];
129 ring->bufs[desc_idx] = ~0;
131 b0 = vlib_get_buffer (vm, bi0);
132 vnet_buffer (b0)->sw_if_index[VLIB_RX] = vd->sw_if_index;
133 vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
134 vnet_buffer (b0)->feature_arc_index = 0;
135 b0->current_length = rx_comp->len & VMXNET3_RXCL_LEN_MASK;
136 b0->current_data = 0;
137 b0->total_length_not_including_first_buffer = 0;
141 b0->current_config_index = 0;
142 ASSERT (b0->current_length != 0);
144 if (PREDICT_FALSE ((rx_comp->index & VMXNET3_RXCI_EOP) &&
145 (rx_comp->len & VMXNET3_RXCL_ERROR)))
147 vlib_buffer_free_one (vm, bi0);
148 vlib_error_count (vm, node->node_index,
149 VMXNET3_INPUT_ERROR_RX_PACKET, 1);
150 if (hb && vlib_get_buffer_index (vm, hb) != bi0)
152 vlib_buffer_free_one (vm, vlib_get_buffer_index (vm, hb));
159 if (rx_comp->index & VMXNET3_RXCI_SOP)
161 ASSERT (!(rxd->flags & VMXNET3_RXF_BTYPE));
165 if (!(rx_comp->index & VMXNET3_RXCI_EOP))
167 hb->flags = VLIB_BUFFER_TOTAL_LENGTH_VALID;
173 * Both start and end of packet is set. It is a complete packet
179 else if (rx_comp->index & VMXNET3_RXCI_EOP)
184 prev_b0->flags |= VLIB_BUFFER_NEXT_PRESENT;
185 prev_b0->next_buffer = bi0;
186 hb->total_length_not_including_first_buffer +=
193 /* EOP without SOP, error */
194 vlib_error_count (vm, node->node_index,
195 VMXNET3_INPUT_ERROR_RX_PACKET_NO_SOP, 1);
196 vlib_buffer_free_one (vm, bi0);
197 if (hb && vlib_get_buffer_index (vm, hb) != bi0)
199 vlib_buffer_free_one (vm, vlib_get_buffer_index (vm, hb));
205 else if (prev_b0) // !sop && !eop
208 ASSERT (rxd->flags & VMXNET3_RXF_BTYPE);
209 prev_b0->flags |= VLIB_BUFFER_NEXT_PRESENT;
210 prev_b0->next_buffer = bi0;
212 hb->total_length_not_including_first_buffer += b0->current_length;
219 n_rx_bytes += b0->current_length;
223 ethernet_header_t *e = (ethernet_header_t *) hb->data;
225 if (PREDICT_FALSE (vd->per_interface_next_index != ~0))
227 next_index = vd->per_interface_next_index;
232 (vnet_device_input_have_features (vd->sw_if_index)))
234 vnet_feature_start_device_input_x1 (vd->sw_if_index,
239 if (PREDICT_FALSE (known_next))
241 next[0] = next_index;
245 if (ethernet_frame_is_tagged (e->type))
246 next[0] = VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT;
249 if (rx_comp->flags & VMXNET3_RXCF_IP4)
251 next[0] = VNET_DEVICE_INPUT_NEXT_IP4_NCS_INPUT;
252 hb->flags |= VNET_BUFFER_F_IS_IP4;
253 vlib_buffer_advance (hb,
254 device_input_next_node_advance
257 else if (rx_comp->flags & VMXNET3_RXCF_IP6)
259 next[0] = VNET_DEVICE_INPUT_NEXT_IP6_INPUT;
260 hb->flags |= VNET_BUFFER_F_IS_IP6;
261 vlib_buffer_advance (hb,
262 device_input_next_node_advance
267 next[0] = VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT;
280 if (PREDICT_FALSE ((n_trace = vlib_get_trace_count (vm, node))))
282 u32 n_left = n_rx_packets;
286 while (n_trace && n_left)
289 vmxnet3_input_trace_t *tr;
291 b = vlib_get_buffer (vm, bi[0]);
292 vlib_trace_buffer (vm, node, next[0], b, /* follow_chain */ 0);
293 tr = vlib_add_trace (vm, node, b, sizeof (*tr));
294 tr->next_index = next[0];
295 tr->hw_if_index = vd->hw_if_index;
303 vlib_set_trace_count (vm, node, n_trace);
306 if (PREDICT_TRUE (n_rx_packets))
308 vlib_buffer_enqueue_to_next (vm, node, buffer_indices, nexts,
310 vlib_increment_combined_counter
311 (vnm->interface_main.combined_sw_if_counters +
312 VNET_INTERFACE_COUNTER_RX, thread_index,
313 vd->hw_if_index, n_rx_packets, n_rx_bytes);
316 error = vmxnet3_rxq_refill_ring0 (vm, vd, rxq);
317 if (PREDICT_FALSE (error != 0))
319 vlib_error_count (vm, node->node_index,
320 VMXNET3_INPUT_ERROR_BUFFER_ALLOC, 1);
322 error = vmxnet3_rxq_refill_ring1 (vm, vd, rxq);
323 if (PREDICT_FALSE (error != 0))
325 vlib_error_count (vm, node->node_index,
326 VMXNET3_INPUT_ERROR_BUFFER_ALLOC, 1);
332 VLIB_NODE_FN (vmxnet3_input_node) (vlib_main_t * vm,
333 vlib_node_runtime_t * node,
334 vlib_frame_t * frame)
337 vmxnet3_main_t *vmxm = &vmxnet3_main;
338 vnet_device_input_runtime_t *rt = (void *) node->runtime_data;
339 vnet_device_and_queue_t *dq;
341 foreach_device_and_queue (dq, rt->devices_and_queues)
343 vmxnet3_device_t *vd;
344 vd = vec_elt_at_index (vmxm->devices, dq->dev_instance);
345 if ((vd->flags & VMXNET3_DEVICE_F_ADMIN_UP) == 0)
347 n_rx += vmxnet3_device_input_inline (vm, node, frame, vd, dq->queue_id);
352 #ifndef CLIB_MARCH_VARIANT
354 VLIB_REGISTER_NODE (vmxnet3_input_node) = {
355 .name = "vmxnet3-input",
356 .sibling_of = "device-input",
357 .format_trace = format_vmxnet3_input_trace,
358 .type = VLIB_NODE_TYPE_INPUT,
359 .state = VLIB_NODE_STATE_DISABLED,
360 .n_errors = VMXNET3_INPUT_N_ERROR,
361 .error_strings = vmxnet3_input_error_strings,
368 * fd.io coding-style-patch-verification: ON
371 * eval: (c-set-style "gnu")