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 _(RX_PACKET_EOP, "Rx packet error found on EOP") \
31 _(NO_BUFFER, "Rx no buffer error")
35 #define _(f,s) VMXNET3_INPUT_ERROR_##f,
36 foreach_vmxnet3_input_error
38 VMXNET3_INPUT_N_ERROR,
39 } vmxnet3_input_error_t;
41 static __clib_unused char *vmxnet3_input_error_strings[] = {
43 foreach_vmxnet3_input_error
47 static_always_inline u16
48 vmxnet3_find_rid (vmxnet3_device_t * vd, vmxnet3_rx_comp * rx_comp)
52 // rid is bits 16-25 (10 bits number)
53 rid = rx_comp->index & (0xffffffff >> 6);
55 if ((rid >= vd->num_rx_queues) && (rid < (vd->num_rx_queues << 1)))
61 static_always_inline void
62 vmxnet3_rx_comp_ring_advance_next (vmxnet3_rxq_t * rxq)
64 vmxnet3_rx_comp_ring *comp_ring = &rxq->rx_comp_ring;
67 if (PREDICT_FALSE (comp_ring->next == rxq->size))
70 comp_ring->gen ^= VMXNET3_RXCF_GEN;
74 static_always_inline uword
75 vmxnet3_device_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
76 vlib_frame_t * frame, vmxnet3_device_t * vd,
79 vnet_main_t *vnm = vnet_get_main ();
80 uword n_trace = vlib_get_trace_count (vm, node);
81 u32 n_rx_packets = 0, n_rx_bytes = 0;
82 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 rx_comp = &rxq->rx_comp[comp_ring->next];
103 while (PREDICT_TRUE ((n_rx_packets < VLIB_FRAME_SIZE) &&
105 (rx_comp->flags & VMXNET3_RXCF_GEN))))
110 rid = vmxnet3_find_rid (vd, rx_comp);
111 ring = &rxq->rx_ring[rid];
113 if (PREDICT_TRUE (ring->fill >= 1))
117 vlib_error_count (vm, node->node_index,
118 VMXNET3_INPUT_ERROR_NO_BUFFER, 1);
121 vlib_buffer_free_one (vm, vlib_get_buffer_index (vm, hb));
128 desc_idx = rx_comp->index & VMXNET3_RXC_INDEX;
129 ring->consume = desc_idx;
130 rxd = &rxq->rx_desc[rid][desc_idx];
132 bi0 = ring->bufs[desc_idx];
133 ring->bufs[desc_idx] = ~0;
135 b0 = vlib_get_buffer (vm, bi0);
136 vnet_buffer (b0)->sw_if_index[VLIB_RX] = vd->sw_if_index;
137 vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
138 vnet_buffer (b0)->feature_arc_index = 0;
139 b0->current_length = rx_comp->len & VMXNET3_RXCL_LEN_MASK;
140 b0->current_data = 0;
141 b0->total_length_not_including_first_buffer = 0;
145 b0->current_config_index = 0;
146 ASSERT (b0->current_length != 0);
148 if (PREDICT_FALSE ((rx_comp->index & VMXNET3_RXCI_EOP) &&
149 (rx_comp->len & VMXNET3_RXCL_ERROR)))
151 vlib_buffer_free_one (vm, bi0);
152 vlib_error_count (vm, node->node_index,
153 VMXNET3_INPUT_ERROR_RX_PACKET_EOP, 1);
154 if (hb && vlib_get_buffer_index (vm, hb) != bi0)
156 vlib_buffer_free_one (vm, vlib_get_buffer_index (vm, hb));
163 if (rx_comp->index & VMXNET3_RXCI_SOP)
165 ASSERT (!(rxd->flags & VMXNET3_RXF_BTYPE));
169 if (!(rx_comp->index & VMXNET3_RXCI_EOP))
171 hb->flags = VLIB_BUFFER_TOTAL_LENGTH_VALID;
177 * Both start and end of packet is set. It is a complete packet
183 else if (rx_comp->index & VMXNET3_RXCI_EOP)
188 prev_b0->flags |= VLIB_BUFFER_NEXT_PRESENT;
189 prev_b0->next_buffer = bi0;
190 hb->total_length_not_including_first_buffer +=
197 /* EOP without SOP, error */
198 vlib_error_count (vm, node->node_index,
199 VMXNET3_INPUT_ERROR_RX_PACKET_NO_SOP, 1);
200 vlib_buffer_free_one (vm, bi0);
201 if (hb && vlib_get_buffer_index (vm, hb) != bi0)
203 vlib_buffer_free_one (vm, vlib_get_buffer_index (vm, hb));
209 else if (prev_b0) // !sop && !eop
212 ASSERT (rxd->flags & VMXNET3_RXF_BTYPE);
213 prev_b0->flags |= VLIB_BUFFER_NEXT_PRESENT;
214 prev_b0->next_buffer = bi0;
216 hb->total_length_not_including_first_buffer += b0->current_length;
220 vlib_error_count (vm, node->node_index,
221 VMXNET3_INPUT_ERROR_RX_PACKET, 1);
222 vlib_buffer_free_one (vm, bi0);
223 if (hb && vlib_get_buffer_index (vm, hb) != bi0)
225 vlib_buffer_free_one (vm, vlib_get_buffer_index (vm, hb));
231 n_rx_bytes += b0->current_length;
235 ethernet_header_t *e = (ethernet_header_t *) hb->data;
237 if (PREDICT_FALSE (vd->per_interface_next_index != ~0))
239 next_index = vd->per_interface_next_index;
244 (vnet_device_input_have_features (vd->sw_if_index)))
246 vnet_feature_start_device_input_x1 (vd->sw_if_index,
251 if (PREDICT_FALSE (known_next))
253 next[0] = next_index;
257 if (ethernet_frame_is_tagged (e->type))
258 next[0] = VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT;
261 if (rx_comp->flags & VMXNET3_RXCF_IP4)
263 next[0] = VNET_DEVICE_INPUT_NEXT_IP4_NCS_INPUT;
264 hb->flags |= VNET_BUFFER_F_IS_IP4;
265 vlib_buffer_advance (hb,
266 device_input_next_node_advance
269 else if (rx_comp->flags & VMXNET3_RXCF_IP6)
271 next[0] = VNET_DEVICE_INPUT_NEXT_IP6_INPUT;
272 hb->flags |= VNET_BUFFER_F_IS_IP6;
273 vlib_buffer_advance (hb,
274 device_input_next_node_advance
279 next[0] = VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT;
292 vmxnet3_rx_comp_ring_advance_next (rxq);
293 rx_comp = &rxq->rx_comp[comp_ring->next];
296 if (PREDICT_FALSE ((n_trace = vlib_get_trace_count (vm, node))))
298 u32 n_left = n_rx_packets;
302 while (n_trace && n_left)
305 vmxnet3_input_trace_t *tr;
307 b = vlib_get_buffer (vm, bi[0]);
308 vlib_trace_buffer (vm, node, next[0], b, /* follow_chain */ 0);
309 tr = vlib_add_trace (vm, node, b, sizeof (*tr));
310 tr->next_index = next[0];
311 tr->hw_if_index = vd->hw_if_index;
319 vlib_set_trace_count (vm, node, n_trace);
322 if (PREDICT_TRUE (n_rx_packets))
324 vlib_buffer_enqueue_to_next (vm, node, buffer_indices, nexts,
326 vlib_increment_combined_counter
327 (vnm->interface_main.combined_sw_if_counters +
328 VNET_INTERFACE_COUNTER_RX, thread_index,
329 vd->hw_if_index, n_rx_packets, n_rx_bytes);
332 error = vmxnet3_rxq_refill_ring0 (vm, vd, rxq);
333 if (PREDICT_FALSE (error != 0))
335 vlib_error_count (vm, node->node_index,
336 VMXNET3_INPUT_ERROR_BUFFER_ALLOC, 1);
338 error = vmxnet3_rxq_refill_ring1 (vm, vd, rxq);
339 if (PREDICT_FALSE (error != 0))
341 vlib_error_count (vm, node->node_index,
342 VMXNET3_INPUT_ERROR_BUFFER_ALLOC, 1);
348 VLIB_NODE_FN (vmxnet3_input_node) (vlib_main_t * vm,
349 vlib_node_runtime_t * node,
350 vlib_frame_t * frame)
353 vmxnet3_main_t *vmxm = &vmxnet3_main;
354 vnet_device_input_runtime_t *rt = (void *) node->runtime_data;
355 vnet_device_and_queue_t *dq;
357 foreach_device_and_queue (dq, rt->devices_and_queues)
359 vmxnet3_device_t *vd;
360 vd = vec_elt_at_index (vmxm->devices, dq->dev_instance);
361 if ((vd->flags & VMXNET3_DEVICE_F_ADMIN_UP) == 0)
363 n_rx += vmxnet3_device_input_inline (vm, node, frame, vd, dq->queue_id);
368 #ifndef CLIB_MARCH_VARIANT
370 VLIB_REGISTER_NODE (vmxnet3_input_node) = {
371 .name = "vmxnet3-input",
372 .sibling_of = "device-input",
373 .format_trace = format_vmxnet3_input_trace,
374 .type = VLIB_NODE_TYPE_INPUT,
375 .state = VLIB_NODE_STATE_DISABLED,
376 .n_errors = VMXNET3_INPUT_N_ERROR,
377 .error_strings = vmxnet3_input_error_strings,
384 * fd.io coding-style-patch-verification: ON
387 * eval: (c-set-style "gnu")