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>
23 #include <vnet/ip/ip6_packet.h>
24 #include <vnet/ip/ip4_packet.h>
25 #include <vnet/udp/udp_packet.h>
27 #include <vmxnet3/vmxnet3.h>
29 #define foreach_vmxnet3_input_error \
30 _(BUFFER_ALLOC, "buffer alloc error") \
31 _(RX_PACKET_NO_SOP, "Rx packet error - no SOP") \
32 _(RX_PACKET, "Rx packet error") \
33 _(RX_PACKET_EOP, "Rx packet error found on EOP") \
34 _(NO_BUFFER, "Rx no buffer error")
38 #define _(f,s) VMXNET3_INPUT_ERROR_##f,
39 foreach_vmxnet3_input_error
41 VMXNET3_INPUT_N_ERROR,
42 } vmxnet3_input_error_t;
44 static __clib_unused char *vmxnet3_input_error_strings[] = {
46 foreach_vmxnet3_input_error
50 static_always_inline u16
51 vmxnet3_find_rid (vmxnet3_device_t * vd, vmxnet3_rx_comp * rx_comp)
55 // rid is bits 16-25 (10 bits number)
56 rid = rx_comp->index & (0xffffffff >> 6);
58 if ((rid >= vd->num_rx_queues) && (rid < (vd->num_rx_queues << 1)))
64 static_always_inline void
65 vmxnet3_rx_comp_ring_advance_next (vmxnet3_rxq_t * rxq)
67 vmxnet3_rx_comp_ring *comp_ring = &rxq->rx_comp_ring;
70 if (PREDICT_FALSE (comp_ring->next == rxq->size))
73 comp_ring->gen ^= VMXNET3_RXCF_GEN;
77 static_always_inline void
78 vmxnet3_handle_offload (vmxnet3_rx_comp * rx_comp, vlib_buffer_t * hb,
79 u16 * next, u16 gso_size)
85 if (rx_comp->flags & VMXNET3_RXCF_TCP)
88 (tcp_header_t *) (hb->data + vnet_buffer (hb)->l4_hdr_offset);
89 l4_hdr_sz = tcp_header_bytes (tcp);
91 else if (rx_comp->flags & VMXNET3_RXCF_UDP)
94 (udp_header_t *) (hb->data + vnet_buffer (hb)->l4_hdr_offset);
95 l4_hdr_sz = sizeof (*udp);
99 if (rx_comp->flags & VMXNET3_RXCF_IP4)
101 ip4_header_t *ip4 = (ip4_header_t *) (hb->data +
102 sizeof (ethernet_header_t));
104 vnet_buffer (hb)->l2_hdr_offset = 0;
105 vnet_buffer (hb)->l3_hdr_offset = sizeof (ethernet_header_t);
106 vnet_buffer (hb)->l4_hdr_offset = sizeof (ethernet_header_t) +
107 ip4_header_bytes (ip4);
108 hb->flags |= VNET_BUFFER_F_L2_HDR_OFFSET_VALID |
109 VNET_BUFFER_F_L3_HDR_OFFSET_VALID |
110 VNET_BUFFER_F_L4_HDR_OFFSET_VALID | VNET_BUFFER_F_IS_IP4;
111 next[0] = VNET_DEVICE_INPUT_NEXT_IP4_NCS_INPUT;
113 /* checksum offload */
114 if (!(rx_comp->index & VMXNET3_RXCI_CNC))
116 if (!(rx_comp->flags & VMXNET3_RXCF_IPC))
118 hb->flags |= VNET_BUFFER_F_OFFLOAD_IP_CKSUM;
121 if (!(rx_comp->flags & VMXNET3_RXCF_TUC))
123 if (rx_comp->flags & VMXNET3_RXCF_TCP)
126 (tcp_header_t *) (hb->data +
127 vnet_buffer (hb)->l4_hdr_offset);
128 hb->flags |= VNET_BUFFER_F_OFFLOAD_TCP_CKSUM;
131 else if (rx_comp->flags & VMXNET3_RXCF_UDP)
134 (udp_header_t *) (hb->data +
135 vnet_buffer (hb)->l4_hdr_offset);
136 hb->flags |= VNET_BUFFER_F_OFFLOAD_UDP_CKSUM;
144 vnet_buffer2 (hb)->gso_size = gso_size;
145 vnet_buffer2 (hb)->gso_l4_hdr_sz = l4_hdr_sz;
146 hb->flags |= VNET_BUFFER_F_GSO;
148 vlib_buffer_advance (hb, device_input_next_node_advance[next[0]]);
150 else if (rx_comp->flags & VMXNET3_RXCF_IP6)
152 vnet_buffer (hb)->l2_hdr_offset = 0;
153 vnet_buffer (hb)->l3_hdr_offset = sizeof (ethernet_header_t);
154 vnet_buffer (hb)->l4_hdr_offset = sizeof (ethernet_header_t) +
155 sizeof (ip6_header_t);
156 hb->flags |= VNET_BUFFER_F_L2_HDR_OFFSET_VALID |
157 VNET_BUFFER_F_L3_HDR_OFFSET_VALID |
158 VNET_BUFFER_F_L4_HDR_OFFSET_VALID | VNET_BUFFER_F_IS_IP6;
159 next[0] = VNET_DEVICE_INPUT_NEXT_IP6_INPUT;
161 /* checksum offload */
162 if (!(rx_comp->index & VMXNET3_RXCI_CNC))
164 if (!(rx_comp->flags & VMXNET3_RXCF_TUC))
166 if (rx_comp->flags & VMXNET3_RXCF_TCP)
169 (tcp_header_t *) (hb->data +
170 vnet_buffer (hb)->l4_hdr_offset);
171 hb->flags |= VNET_BUFFER_F_OFFLOAD_TCP_CKSUM;
174 else if (rx_comp->flags & VMXNET3_RXCF_UDP)
177 (udp_header_t *) (hb->data +
178 vnet_buffer (hb)->l4_hdr_offset);
179 hb->flags |= VNET_BUFFER_F_OFFLOAD_UDP_CKSUM;
187 vnet_buffer2 (hb)->gso_size = gso_size;
188 vnet_buffer2 (hb)->gso_l4_hdr_sz = l4_hdr_sz;
189 hb->flags |= VNET_BUFFER_F_GSO;
191 vlib_buffer_advance (hb, device_input_next_node_advance[next[0]]);
194 next[0] = VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT;
197 static_always_inline uword
198 vmxnet3_device_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
199 vlib_frame_t * frame, vmxnet3_device_t * vd,
202 vnet_main_t *vnm = vnet_get_main ();
203 uword n_trace = vlib_get_trace_count (vm, node);
204 u32 n_rx_packets = 0, n_rx_bytes = 0;
205 vmxnet3_rx_comp *rx_comp;
208 u32 thread_index = vm->thread_index;
209 u32 buffer_indices[VLIB_FRAME_SIZE], *bi;
210 u16 nexts[VLIB_FRAME_SIZE], *next;
211 vmxnet3_rx_ring *ring;
212 vmxnet3_rx_comp_ring *comp_ring;
214 vlib_buffer_t *prev_b0 = 0, *hb = 0;
215 u32 next_index = VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT;
216 u8 known_next = 0, got_packet = 0;
217 vmxnet3_rx_desc *rxd;
221 rxq = vec_elt_at_index (vd->rxqs, qid);
222 comp_ring = &rxq->rx_comp_ring;
225 rx_comp = &rxq->rx_comp[comp_ring->next];
227 while (PREDICT_TRUE ((n_rx_packets < VLIB_FRAME_SIZE) &&
229 (rx_comp->flags & VMXNET3_RXCF_GEN))))
234 rid = vmxnet3_find_rid (vd, rx_comp);
235 ring = &rxq->rx_ring[rid];
237 if (PREDICT_TRUE (ring->fill >= 1))
241 vlib_error_count (vm, node->node_index,
242 VMXNET3_INPUT_ERROR_NO_BUFFER, 1);
245 vlib_buffer_free_one (vm, vlib_get_buffer_index (vm, hb));
252 desc_idx = rx_comp->index & VMXNET3_RXC_INDEX;
253 ring->consume = desc_idx;
254 rxd = &rxq->rx_desc[rid][desc_idx];
256 bi0 = ring->bufs[desc_idx];
257 ring->bufs[desc_idx] = ~0;
259 b0 = vlib_get_buffer (vm, bi0);
260 vnet_buffer (b0)->sw_if_index[VLIB_RX] = vd->sw_if_index;
261 vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
262 vnet_buffer (b0)->feature_arc_index = 0;
263 b0->current_length = rx_comp->len & VMXNET3_RXCL_LEN_MASK;
264 b0->current_data = 0;
265 b0->total_length_not_including_first_buffer = 0;
269 b0->current_config_index = 0;
270 ASSERT (b0->current_length != 0);
272 if (PREDICT_FALSE ((rx_comp->index & VMXNET3_RXCI_EOP) &&
273 (rx_comp->len & VMXNET3_RXCL_ERROR)))
275 vlib_buffer_free_one (vm, bi0);
276 vlib_error_count (vm, node->node_index,
277 VMXNET3_INPUT_ERROR_RX_PACKET_EOP, 1);
278 if (hb && vlib_get_buffer_index (vm, hb) != bi0)
280 vlib_buffer_free_one (vm, vlib_get_buffer_index (vm, hb));
287 if (rx_comp->index & VMXNET3_RXCI_SOP)
289 ASSERT (!(rxd->flags & VMXNET3_RXF_BTYPE));
291 if ((vd->lro_enable) &&
292 (rx_comp->flags & VMXNET3_RXCF_CT) == VMXNET3_RXCOMP_TYPE_LRO)
294 vmxnet3_rx_comp_ext *lro = (vmxnet3_rx_comp_ext *) rx_comp;
296 gso_size = lro->flags & VMXNET3_RXECF_MSS_MASK;
301 if (!(rx_comp->index & VMXNET3_RXCI_EOP))
303 hb->flags = VLIB_BUFFER_TOTAL_LENGTH_VALID;
309 * Both start and end of packet is set. It is a complete packet
315 else if (rx_comp->index & VMXNET3_RXCI_EOP)
320 prev_b0->flags |= VLIB_BUFFER_NEXT_PRESENT;
321 prev_b0->next_buffer = bi0;
322 hb->total_length_not_including_first_buffer +=
329 /* EOP without SOP, error */
330 vlib_error_count (vm, node->node_index,
331 VMXNET3_INPUT_ERROR_RX_PACKET_NO_SOP, 1);
332 vlib_buffer_free_one (vm, bi0);
333 if (hb && vlib_get_buffer_index (vm, hb) != bi0)
335 vlib_buffer_free_one (vm, vlib_get_buffer_index (vm, hb));
341 else if (prev_b0) // !sop && !eop
344 ASSERT (rxd->flags & VMXNET3_RXF_BTYPE);
345 prev_b0->flags |= VLIB_BUFFER_NEXT_PRESENT;
346 prev_b0->next_buffer = bi0;
348 hb->total_length_not_including_first_buffer += b0->current_length;
352 vlib_error_count (vm, node->node_index,
353 VMXNET3_INPUT_ERROR_RX_PACKET, 1);
354 vlib_buffer_free_one (vm, bi0);
355 if (hb && vlib_get_buffer_index (vm, hb) != bi0)
357 vlib_buffer_free_one (vm, vlib_get_buffer_index (vm, hb));
363 n_rx_bytes += b0->current_length;
367 if (PREDICT_FALSE (vd->per_interface_next_index != ~0))
369 next_index = vd->per_interface_next_index;
374 (vnet_device_input_have_features (vd->sw_if_index)))
376 vnet_feature_start_device_input_x1 (vd->sw_if_index,
381 if (PREDICT_FALSE (known_next))
383 next[0] = next_index;
387 ethernet_header_t *e = (ethernet_header_t *) hb->data;
389 if (ethernet_frame_is_tagged (e->type))
390 next[0] = VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT;
392 vmxnet3_handle_offload (rx_comp, hb, next, gso_size);
404 vmxnet3_rx_comp_ring_advance_next (rxq);
405 rx_comp = &rxq->rx_comp[comp_ring->next];
408 if (PREDICT_FALSE ((n_trace = vlib_get_trace_count (vm, node))))
410 u32 n_left = n_rx_packets;
414 while (n_trace && n_left)
417 vmxnet3_input_trace_t *tr;
419 b = vlib_get_buffer (vm, bi[0]);
420 vlib_trace_buffer (vm, node, next[0], b, /* follow_chain */ 0);
421 tr = vlib_add_trace (vm, node, b, sizeof (*tr));
422 tr->next_index = next[0];
423 tr->hw_if_index = vd->hw_if_index;
431 vlib_set_trace_count (vm, node, n_trace);
434 if (PREDICT_TRUE (n_rx_packets))
436 vlib_buffer_enqueue_to_next (vm, node, buffer_indices, nexts,
438 vlib_increment_combined_counter
439 (vnm->interface_main.combined_sw_if_counters +
440 VNET_INTERFACE_COUNTER_RX, thread_index,
441 vd->hw_if_index, n_rx_packets, n_rx_bytes);
444 error = vmxnet3_rxq_refill_ring0 (vm, vd, rxq);
445 if (PREDICT_FALSE (error != 0))
447 vlib_error_count (vm, node->node_index,
448 VMXNET3_INPUT_ERROR_BUFFER_ALLOC, 1);
450 error = vmxnet3_rxq_refill_ring1 (vm, vd, rxq);
451 if (PREDICT_FALSE (error != 0))
453 vlib_error_count (vm, node->node_index,
454 VMXNET3_INPUT_ERROR_BUFFER_ALLOC, 1);
460 VLIB_NODE_FN (vmxnet3_input_node) (vlib_main_t * vm,
461 vlib_node_runtime_t * node,
462 vlib_frame_t * frame)
465 vmxnet3_main_t *vmxm = &vmxnet3_main;
466 vnet_device_input_runtime_t *rt = (void *) node->runtime_data;
467 vnet_device_and_queue_t *dq;
469 foreach_device_and_queue (dq, rt->devices_and_queues)
471 vmxnet3_device_t *vd;
472 vd = vec_elt_at_index (vmxm->devices, dq->dev_instance);
473 if ((vd->flags & VMXNET3_DEVICE_F_ADMIN_UP) == 0)
475 n_rx += vmxnet3_device_input_inline (vm, node, frame, vd, dq->queue_id);
480 #ifndef CLIB_MARCH_VARIANT
482 VLIB_REGISTER_NODE (vmxnet3_input_node) = {
483 .name = "vmxnet3-input",
484 .sibling_of = "device-input",
485 .format_trace = format_vmxnet3_input_trace,
486 .type = VLIB_NODE_TYPE_INPUT,
487 .state = VLIB_NODE_STATE_DISABLED,
488 .n_errors = VMXNET3_INPUT_N_ERROR,
489 .error_strings = vmxnet3_input_error_strings,
496 * fd.io coding-style-patch-verification: ON
499 * eval: (c-set-style "gnu")