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) &&
104 (comp_ring->gen == (rx_comp->flags & VMXNET3_RXCF_GEN)))
109 rid = vmxnet3_find_rid (vd, rx_comp);
110 ring = &rxq->rx_ring[rid];
112 if (PREDICT_TRUE (ring->fill >= 1))
116 vlib_error_count (vm, node->node_index,
117 VMXNET3_INPUT_ERROR_NO_BUFFER, 1);
120 vlib_buffer_free_one (vm, vlib_get_buffer_index (vm, hb));
127 desc_idx = rx_comp->index & VMXNET3_RXC_INDEX;
128 ring->consume = desc_idx;
129 rxd = &rxq->rx_desc[rid][desc_idx];
131 bi0 = ring->bufs[desc_idx];
132 ring->bufs[desc_idx] = ~0;
134 b0 = vlib_get_buffer (vm, bi0);
135 vnet_buffer (b0)->sw_if_index[VLIB_RX] = vd->sw_if_index;
136 vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
137 vnet_buffer (b0)->feature_arc_index = 0;
138 b0->current_length = rx_comp->len & VMXNET3_RXCL_LEN_MASK;
139 b0->current_data = 0;
140 b0->total_length_not_including_first_buffer = 0;
144 b0->current_config_index = 0;
145 ASSERT (b0->current_length != 0);
147 if (PREDICT_FALSE ((rx_comp->index & VMXNET3_RXCI_EOP) &&
148 (rx_comp->len & VMXNET3_RXCL_ERROR)))
150 vlib_buffer_free_one (vm, bi0);
151 vlib_error_count (vm, node->node_index,
152 VMXNET3_INPUT_ERROR_RX_PACKET_EOP, 1);
153 if (hb && vlib_get_buffer_index (vm, hb) != bi0)
155 vlib_buffer_free_one (vm, vlib_get_buffer_index (vm, hb));
162 if (rx_comp->index & VMXNET3_RXCI_SOP)
164 ASSERT (!(rxd->flags & VMXNET3_RXF_BTYPE));
168 if (!(rx_comp->index & VMXNET3_RXCI_EOP))
170 hb->flags = VLIB_BUFFER_TOTAL_LENGTH_VALID;
176 * Both start and end of packet is set. It is a complete packet
182 else if (rx_comp->index & VMXNET3_RXCI_EOP)
187 prev_b0->flags |= VLIB_BUFFER_NEXT_PRESENT;
188 prev_b0->next_buffer = bi0;
189 hb->total_length_not_including_first_buffer +=
196 /* EOP without SOP, error */
197 vlib_error_count (vm, node->node_index,
198 VMXNET3_INPUT_ERROR_RX_PACKET_NO_SOP, 1);
199 vlib_buffer_free_one (vm, bi0);
200 if (hb && vlib_get_buffer_index (vm, hb) != bi0)
202 vlib_buffer_free_one (vm, vlib_get_buffer_index (vm, hb));
208 else if (prev_b0) // !sop && !eop
211 ASSERT (rxd->flags & VMXNET3_RXF_BTYPE);
212 prev_b0->flags |= VLIB_BUFFER_NEXT_PRESENT;
213 prev_b0->next_buffer = bi0;
215 hb->total_length_not_including_first_buffer += b0->current_length;
219 vlib_error_count (vm, node->node_index,
220 VMXNET3_INPUT_ERROR_RX_PACKET, 1);
221 vlib_buffer_free_one (vm, bi0);
222 if (hb && vlib_get_buffer_index (vm, hb) != bi0)
224 vlib_buffer_free_one (vm, vlib_get_buffer_index (vm, hb));
230 n_rx_bytes += b0->current_length;
234 ethernet_header_t *e = (ethernet_header_t *) hb->data;
236 if (PREDICT_FALSE (vd->per_interface_next_index != ~0))
238 next_index = vd->per_interface_next_index;
243 (vnet_device_input_have_features (vd->sw_if_index)))
245 vnet_feature_start_device_input_x1 (vd->sw_if_index,
250 if (PREDICT_FALSE (known_next))
252 next[0] = next_index;
256 if (ethernet_frame_is_tagged (e->type))
257 next[0] = VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT;
260 if (rx_comp->flags & VMXNET3_RXCF_IP4)
262 next[0] = VNET_DEVICE_INPUT_NEXT_IP4_NCS_INPUT;
263 hb->flags |= VNET_BUFFER_F_IS_IP4;
264 vlib_buffer_advance (hb,
265 device_input_next_node_advance
268 else if (rx_comp->flags & VMXNET3_RXCF_IP6)
270 next[0] = VNET_DEVICE_INPUT_NEXT_IP6_INPUT;
271 hb->flags |= VNET_BUFFER_F_IS_IP6;
272 vlib_buffer_advance (hb,
273 device_input_next_node_advance
278 next[0] = VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT;
291 vmxnet3_rx_comp_ring_advance_next (rxq);
292 rx_comp = &rxq->rx_comp[comp_ring->next];
295 if (PREDICT_FALSE ((n_trace = vlib_get_trace_count (vm, node))))
297 u32 n_left = n_rx_packets;
301 while (n_trace && n_left)
304 vmxnet3_input_trace_t *tr;
306 b = vlib_get_buffer (vm, bi[0]);
307 vlib_trace_buffer (vm, node, next[0], b, /* follow_chain */ 0);
308 tr = vlib_add_trace (vm, node, b, sizeof (*tr));
309 tr->next_index = next[0];
310 tr->hw_if_index = vd->hw_if_index;
318 vlib_set_trace_count (vm, node, n_trace);
321 if (PREDICT_TRUE (n_rx_packets))
323 vlib_buffer_enqueue_to_next (vm, node, buffer_indices, nexts,
325 vlib_increment_combined_counter
326 (vnm->interface_main.combined_sw_if_counters +
327 VNET_INTERFACE_COUNTER_RX, thread_index,
328 vd->hw_if_index, n_rx_packets, n_rx_bytes);
331 error = vmxnet3_rxq_refill_ring0 (vm, vd, rxq);
332 if (PREDICT_FALSE (error != 0))
334 vlib_error_count (vm, node->node_index,
335 VMXNET3_INPUT_ERROR_BUFFER_ALLOC, 1);
337 error = vmxnet3_rxq_refill_ring1 (vm, vd, rxq);
338 if (PREDICT_FALSE (error != 0))
340 vlib_error_count (vm, node->node_index,
341 VMXNET3_INPUT_ERROR_BUFFER_ALLOC, 1);
347 VLIB_NODE_FN (vmxnet3_input_node) (vlib_main_t * vm,
348 vlib_node_runtime_t * node,
349 vlib_frame_t * frame)
352 vmxnet3_main_t *vmxm = &vmxnet3_main;
353 vnet_device_input_runtime_t *rt = (void *) node->runtime_data;
354 vnet_device_and_queue_t *dq;
356 foreach_device_and_queue (dq, rt->devices_and_queues)
358 vmxnet3_device_t *vd;
359 vd = vec_elt_at_index (vmxm->devices, dq->dev_instance);
360 if ((vd->flags & VMXNET3_DEVICE_F_ADMIN_UP) == 0)
362 n_rx += vmxnet3_device_input_inline (vm, node, frame, vd, dq->queue_id);
367 #ifndef CLIB_MARCH_VARIANT
369 VLIB_REGISTER_NODE (vmxnet3_input_node) = {
370 .name = "vmxnet3-input",
371 .sibling_of = "device-input",
372 .format_trace = format_vmxnet3_input_trace,
373 .type = VLIB_NODE_TYPE_INPUT,
374 .state = VLIB_NODE_STATE_DISABLED,
375 .n_errors = VMXNET3_INPUT_N_ERROR,
376 .error_strings = vmxnet3_input_error_strings,
383 * fd.io coding-style-patch-verification: ON
386 * eval: (c-set-style "gnu")