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>
26 #include <vnet/interface/rx_queue_funcs.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,
82 vnet_buffer_oflags_t oflags = 0;
84 if (rx_comp->flags & VMXNET3_RXCF_IP4)
86 ip4_header_t *ip4 = (ip4_header_t *) (hb->data +
87 sizeof (ethernet_header_t));
89 vnet_buffer (hb)->l2_hdr_offset = 0;
90 vnet_buffer (hb)->l3_hdr_offset = sizeof (ethernet_header_t);
91 vnet_buffer (hb)->l4_hdr_offset = sizeof (ethernet_header_t) +
92 ip4_header_bytes (ip4);
93 hb->flags |= VNET_BUFFER_F_L2_HDR_OFFSET_VALID |
94 VNET_BUFFER_F_L3_HDR_OFFSET_VALID |
95 VNET_BUFFER_F_L4_HDR_OFFSET_VALID | VNET_BUFFER_F_IS_IP4;
97 /* checksum offload */
98 if (!(rx_comp->index & VMXNET3_RXCI_CNC))
100 if (!(rx_comp->flags & VMXNET3_RXCF_IPC))
102 oflags |= VNET_BUFFER_OFFLOAD_F_IP_CKSUM;
105 if (!(rx_comp->flags & VMXNET3_RXCF_TUC))
107 if (rx_comp->flags & VMXNET3_RXCF_TCP)
110 (tcp_header_t *) (hb->data +
111 vnet_buffer (hb)->l4_hdr_offset);
112 oflags |= VNET_BUFFER_OFFLOAD_F_TCP_CKSUM;
115 else if (rx_comp->flags & VMXNET3_RXCF_UDP)
118 (udp_header_t *) (hb->data +
119 vnet_buffer (hb)->l4_hdr_offset);
120 oflags |= VNET_BUFFER_OFFLOAD_F_UDP_CKSUM;
128 if (rx_comp->flags & VMXNET3_RXCF_TCP)
131 (tcp_header_t *) (hb->data + vnet_buffer (hb)->l4_hdr_offset);
132 l4_hdr_sz = tcp_header_bytes (tcp);
134 else if (rx_comp->flags & VMXNET3_RXCF_UDP)
137 (udp_header_t *) (hb->data + vnet_buffer (hb)->l4_hdr_offset);
138 l4_hdr_sz = sizeof (*udp);
140 vnet_buffer2 (hb)->gso_size = gso_size;
141 vnet_buffer2 (hb)->gso_l4_hdr_sz = l4_hdr_sz;
142 hb->flags |= VNET_BUFFER_F_GSO;
145 else if (rx_comp->flags & VMXNET3_RXCF_IP6)
147 vnet_buffer (hb)->l2_hdr_offset = 0;
148 vnet_buffer (hb)->l3_hdr_offset = sizeof (ethernet_header_t);
149 vnet_buffer (hb)->l4_hdr_offset = sizeof (ethernet_header_t) +
150 sizeof (ip6_header_t);
151 hb->flags |= VNET_BUFFER_F_L2_HDR_OFFSET_VALID |
152 VNET_BUFFER_F_L3_HDR_OFFSET_VALID |
153 VNET_BUFFER_F_L4_HDR_OFFSET_VALID | VNET_BUFFER_F_IS_IP6;
155 /* checksum offload */
156 if (!(rx_comp->index & VMXNET3_RXCI_CNC))
158 if (!(rx_comp->flags & VMXNET3_RXCF_TUC))
160 if (rx_comp->flags & VMXNET3_RXCF_TCP)
163 (tcp_header_t *) (hb->data +
164 vnet_buffer (hb)->l4_hdr_offset);
165 oflags |= VNET_BUFFER_OFFLOAD_F_TCP_CKSUM;
168 else if (rx_comp->flags & VMXNET3_RXCF_UDP)
171 (udp_header_t *) (hb->data +
172 vnet_buffer (hb)->l4_hdr_offset);
173 oflags |= VNET_BUFFER_OFFLOAD_F_UDP_CKSUM;
181 if (rx_comp->flags & VMXNET3_RXCF_TCP)
184 (tcp_header_t *) (hb->data + vnet_buffer (hb)->l4_hdr_offset);
185 l4_hdr_sz = tcp_header_bytes (tcp);
187 else if (rx_comp->flags & VMXNET3_RXCF_UDP)
190 (udp_header_t *) (hb->data + vnet_buffer (hb)->l4_hdr_offset);
191 l4_hdr_sz = sizeof (*udp);
193 vnet_buffer2 (hb)->gso_size = gso_size;
194 vnet_buffer2 (hb)->gso_l4_hdr_sz = l4_hdr_sz;
195 hb->flags |= VNET_BUFFER_F_GSO;
199 vnet_buffer_offload_flags_set (hb, oflags);
202 static_always_inline uword
203 vmxnet3_device_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
204 vlib_frame_t * frame, vmxnet3_device_t * vd,
207 vnet_main_t *vnm = vnet_get_main ();
208 uword n_trace = vlib_get_trace_count (vm, node);
209 u32 n_rx_packets = 0, n_rx_bytes = 0;
210 vmxnet3_rx_comp *rx_comp;
213 u32 thread_index = vm->thread_index;
214 u32 buffer_indices[VLIB_FRAME_SIZE], *bi;
215 u16 nexts[VLIB_FRAME_SIZE], *next;
216 vmxnet3_rx_ring *ring;
217 vmxnet3_rx_comp_ring *comp_ring;
219 vlib_buffer_t *prev_b0 = 0, *hb = 0;
220 u32 next_index = VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT;
221 u8 known_next = 0, got_packet = 0;
222 vmxnet3_rx_desc *rxd;
226 rxq = vec_elt_at_index (vd->rxqs, qid);
227 comp_ring = &rxq->rx_comp_ring;
230 rx_comp = &rxq->rx_comp[comp_ring->next];
232 while (PREDICT_TRUE ((n_rx_packets < VLIB_FRAME_SIZE) &&
234 (rx_comp->flags & VMXNET3_RXCF_GEN))))
239 rid = vmxnet3_find_rid (vd, rx_comp);
240 ring = &rxq->rx_ring[rid];
242 if (PREDICT_TRUE (ring->fill >= 1))
246 vlib_error_count (vm, node->node_index,
247 VMXNET3_INPUT_ERROR_NO_BUFFER, 1);
250 vlib_buffer_free_one (vm, vlib_get_buffer_index (vm, hb));
257 desc_idx = rx_comp->index & VMXNET3_RXC_INDEX;
258 ring->consume = desc_idx;
259 rxd = &rxq->rx_desc[rid][desc_idx];
261 bi0 = ring->bufs[desc_idx];
262 ring->bufs[desc_idx] = ~0;
264 b0 = vlib_get_buffer (vm, bi0);
265 vnet_buffer (b0)->sw_if_index[VLIB_RX] = vd->sw_if_index;
266 vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
267 vnet_buffer (b0)->feature_arc_index = 0;
268 b0->current_length = rx_comp->len & VMXNET3_RXCL_LEN_MASK;
269 b0->current_data = 0;
270 b0->total_length_not_including_first_buffer = 0;
274 b0->current_config_index = 0;
276 if (PREDICT_FALSE ((rx_comp->index & VMXNET3_RXCI_EOP) &&
277 (rx_comp->len & VMXNET3_RXCL_ERROR)))
279 vlib_buffer_free_one (vm, bi0);
280 vlib_error_count (vm, node->node_index,
281 VMXNET3_INPUT_ERROR_RX_PACKET_EOP, 1);
282 if (hb && vlib_get_buffer_index (vm, hb) != bi0)
284 vlib_buffer_free_one (vm, vlib_get_buffer_index (vm, hb));
291 if (rx_comp->index & VMXNET3_RXCI_SOP)
293 ASSERT (!(rxd->flags & VMXNET3_RXF_BTYPE));
295 if (vd->gso_enable &&
296 (rx_comp->flags & VMXNET3_RXCF_CT) == VMXNET3_RXCOMP_TYPE_LRO)
298 vmxnet3_rx_comp_ext *lro = (vmxnet3_rx_comp_ext *) rx_comp;
300 gso_size = lro->flags & VMXNET3_RXECF_MSS_MASK;
305 if (!(rx_comp->index & VMXNET3_RXCI_EOP))
307 hb->flags = VLIB_BUFFER_TOTAL_LENGTH_VALID;
313 * Both start and end of packet is set. It is a complete packet
319 else if (rx_comp->index & VMXNET3_RXCI_EOP)
322 if (PREDICT_TRUE (prev_b0 != 0))
324 if (PREDICT_TRUE (b0->current_length != 0))
326 prev_b0->flags |= VLIB_BUFFER_NEXT_PRESENT;
327 prev_b0->next_buffer = bi0;
328 hb->total_length_not_including_first_buffer +=
333 vlib_buffer_free_one (vm, bi0);
340 /* EOP without SOP, error */
341 vlib_error_count (vm, node->node_index,
342 VMXNET3_INPUT_ERROR_RX_PACKET_NO_SOP, 1);
343 vlib_buffer_free_one (vm, bi0);
344 if (hb && vlib_get_buffer_index (vm, hb) != bi0)
346 vlib_buffer_free_one (vm, vlib_get_buffer_index (vm, hb));
352 else if (prev_b0) // !sop && !eop
355 ASSERT (rxd->flags & VMXNET3_RXF_BTYPE);
356 prev_b0->flags |= VLIB_BUFFER_NEXT_PRESENT;
357 prev_b0->next_buffer = bi0;
359 hb->total_length_not_including_first_buffer += b0->current_length;
363 vlib_error_count (vm, node->node_index,
364 VMXNET3_INPUT_ERROR_RX_PACKET, 1);
365 vlib_buffer_free_one (vm, bi0);
366 if (hb && vlib_get_buffer_index (vm, hb) != bi0)
368 vlib_buffer_free_one (vm, vlib_get_buffer_index (vm, hb));
374 n_rx_bytes += b0->current_length;
378 if (PREDICT_FALSE (vd->per_interface_next_index != ~0))
380 next_index = vd->per_interface_next_index;
385 (vnet_device_input_have_features (vd->sw_if_index)))
387 vnet_feature_start_device_input_x1 (vd->sw_if_index,
392 if (PREDICT_FALSE (known_next))
393 next[0] = next_index;
396 ethernet_header_t *e = (ethernet_header_t *) hb->data;
398 next[0] = VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT;
399 if (!ethernet_frame_is_tagged (ntohs (e->type)))
400 vmxnet3_handle_offload (rx_comp, hb, gso_size);
412 vmxnet3_rx_comp_ring_advance_next (rxq);
413 rx_comp = &rxq->rx_comp[comp_ring->next];
416 if (PREDICT_FALSE ((n_trace = vlib_get_trace_count (vm, node))))
418 u32 n_left = n_rx_packets;
422 while (n_trace && n_left)
424 vlib_buffer_t *b = vlib_get_buffer (vm, bi[0]);
427 (vm, node, next[0], b, /* follow_chain */ 0)))
429 vmxnet3_input_trace_t *tr =
430 vlib_add_trace (vm, node, b, sizeof (*tr));
431 tr->next_index = next[0];
432 tr->hw_if_index = vd->hw_if_index;
440 vlib_set_trace_count (vm, node, n_trace);
443 if (PREDICT_TRUE (n_rx_packets))
445 vlib_buffer_enqueue_to_next (vm, node, buffer_indices, nexts,
447 vlib_increment_combined_counter
448 (vnm->interface_main.combined_sw_if_counters +
449 VNET_INTERFACE_COUNTER_RX, thread_index,
450 vd->sw_if_index, n_rx_packets, n_rx_bytes);
453 error = vmxnet3_rxq_refill_ring0 (vm, vd, rxq);
454 if (PREDICT_FALSE (error != 0))
456 vlib_error_count (vm, node->node_index,
457 VMXNET3_INPUT_ERROR_BUFFER_ALLOC, 1);
459 error = vmxnet3_rxq_refill_ring1 (vm, vd, rxq);
460 if (PREDICT_FALSE (error != 0))
462 vlib_error_count (vm, node->node_index,
463 VMXNET3_INPUT_ERROR_BUFFER_ALLOC, 1);
469 VLIB_NODE_FN (vmxnet3_input_node) (vlib_main_t * vm,
470 vlib_node_runtime_t * node,
471 vlib_frame_t * frame)
474 vmxnet3_main_t *vmxm = &vmxnet3_main;
475 vnet_hw_if_rxq_poll_vector_t *pv = vnet_hw_if_get_rxq_poll_vector (vm, node);
476 vnet_hw_if_rxq_poll_vector_t *pve;
478 vec_foreach (pve, pv)
480 vmxnet3_device_t *vd;
481 vd = vec_elt_at_index (vmxm->devices, pve->dev_instance);
482 if ((vd->flags & VMXNET3_DEVICE_F_ADMIN_UP) == 0)
484 n_rx += vmxnet3_device_input_inline (vm, node, frame, vd, pve->queue_id);
489 #ifndef CLIB_MARCH_VARIANT
491 VLIB_REGISTER_NODE (vmxnet3_input_node) = {
492 .name = "vmxnet3-input",
493 .sibling_of = "device-input",
494 .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
495 .format_trace = format_vmxnet3_input_trace,
496 .type = VLIB_NODE_TYPE_INPUT,
497 .state = VLIB_NODE_STATE_DISABLED,
498 .n_errors = VMXNET3_INPUT_N_ERROR,
499 .error_strings = vmxnet3_input_error_strings,
506 * fd.io coding-style-patch-verification: ON
509 * eval: (c-set-style "gnu")