2 * Copyright (c) 2018 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
17 #include <sys/ioctl.h>
19 #include <vppinfra/types.h>
20 #include <vlib/vlib.h>
21 #include <vlib/pci/pci.h>
22 #include <vnet/ethernet/ethernet.h>
23 #include <vnet/ip/ip4_packet.h>
24 #include <vnet/ip/ip6_packet.h>
25 #include <vnet/devices/virtio/virtio.h>
26 #include <vnet/devices/virtio/pci.h>
27 #include <vnet/interface/rx_queue_funcs.h>
29 #define PCI_VENDOR_ID_VIRTIO 0x1af4
30 #define PCI_DEVICE_ID_VIRTIO_NIC 0x1000
31 /* Doesn't support modern device */
32 #define PCI_DEVICE_ID_VIRTIO_NIC_MODERN 0x1041
34 #define PCI_CAPABILITY_LIST 0x34
35 #define PCI_CAP_ID_VNDR 0x09
36 #define PCI_CAP_ID_MSIX 0x11
38 #define PCI_MSIX_ENABLE 0x8000
40 static pci_device_id_t virtio_pci_device_ids[] = {
42 .vendor_id = PCI_VENDOR_ID_VIRTIO,
43 .device_id = PCI_DEVICE_ID_VIRTIO_NIC},
45 .vendor_id = PCI_VENDOR_ID_VIRTIO,
46 .device_id = PCI_DEVICE_ID_VIRTIO_NIC_MODERN},
51 virtio_pci_flag_change (vnet_main_t * vnm, vnet_hw_interface_t * hw,
58 virtio_pci_get_max_virtqueue_pairs (vlib_main_t * vm, virtio_if_t * vif)
60 clib_error_t *error = 0;
61 u16 max_queue_pairs = 1;
63 if (vif->features & VIRTIO_FEATURE (VIRTIO_NET_F_MQ))
65 max_queue_pairs = vif->virtio_pci_func->get_max_queue_pairs (vm, vif);
68 virtio_log_debug (vif, "max queue pair is %x", max_queue_pairs);
69 if (max_queue_pairs < 1 || max_queue_pairs > 0x8000)
70 return clib_error_return (error, "max queue pair is %x,"
71 " should be in range [1, 0x8000]",
74 vif->max_queue_pairs = max_queue_pairs;
79 virtio_pci_set_mac (vlib_main_t * vm, virtio_if_t * vif)
81 if (vif->features & VIRTIO_FEATURE (VIRTIO_NET_F_MAC))
82 vif->virtio_pci_func->set_mac (vm, vif);
86 virtio_pci_get_mac (vlib_main_t * vm, virtio_if_t * vif)
88 if (vif->features & VIRTIO_FEATURE (VIRTIO_NET_F_MAC))
90 vif->virtio_pci_func->get_mac (vm, vif);
97 virtio_pci_is_link_up (vlib_main_t * vm, virtio_if_t * vif)
100 * Minimal driver: assumes link is up
103 if (vif->features & VIRTIO_FEATURE (VIRTIO_NET_F_STATUS))
104 status = vif->virtio_pci_func->get_device_status (vm, vif);
109 virtio_pci_irq_queue_handler (vlib_main_t * vm, vlib_pci_dev_handle_t h,
112 vnet_main_t *vnm = vnet_get_main ();
113 virtio_main_t *vim = &virtio_main;
114 uword pd = vlib_pci_get_private_data (vm, h);
115 virtio_if_t *vif = pool_elt_at_index (vim->interfaces, pd);
119 virtio_vring_t *vring = vec_elt_at_index (vif->rxq_vrings, qid);
120 vnet_hw_if_rx_queue_set_int_pending (vnm, vring->queue_index);
124 virtio_pci_irq_config_handler (vlib_main_t * vm, vlib_pci_dev_handle_t h,
127 vnet_main_t *vnm = vnet_get_main ();
128 virtio_main_t *vim = &virtio_main;
129 uword pd = vlib_pci_get_private_data (vm, h);
130 virtio_if_t *vif = pool_elt_at_index (vim->interfaces, pd);
132 if (virtio_pci_is_link_up (vm, vif) & VIRTIO_NET_S_LINK_UP)
134 vif->flags |= VIRTIO_IF_FLAG_ADMIN_UP;
135 vnet_hw_interface_set_flags (vnm, vif->hw_if_index,
136 VNET_HW_INTERFACE_FLAG_LINK_UP);
140 vif->flags &= ~VIRTIO_IF_FLAG_ADMIN_UP;
141 vnet_hw_interface_set_flags (vnm, vif->hw_if_index, 0);
146 virtio_pci_irq_handler (vlib_main_t * vm, vlib_pci_dev_handle_t h)
148 virtio_main_t *vim = &virtio_main;
149 uword pd = vlib_pci_get_private_data (vm, h);
150 virtio_if_t *vif = pool_elt_at_index (vim->interfaces, pd);
154 isr = vif->virtio_pci_func->get_isr (vm, vif);
157 * If the lower bit is set: look through the used rings of
158 * all virtqueues for the device, to see if any progress has
159 * been made by the device which requires servicing.
161 if (isr & VIRTIO_PCI_ISR_INTR)
163 for (; line < vif->num_rxqs; line++)
164 virtio_pci_irq_queue_handler (vm, h, (line + 1));
167 if (isr & VIRTIO_PCI_ISR_CONFIG)
168 virtio_pci_irq_config_handler (vm, h, line);
172 device_status (vlib_main_t * vm, virtio_if_t * vif)
179 struct status_struct *status_entry;
180 static struct status_struct status_array[] = {
181 #define _(s,b) { .str = #s, .bit = b, },
182 foreach_virtio_config_status_flags
187 vlib_cli_output (vm, " status 0x%x", vif->status);
189 status_entry = (struct status_struct *) &status_array;
190 while (status_entry->str)
192 if (vif->status & status_entry->bit)
193 vlib_cli_output (vm, " %s (%x)", status_entry->str,
200 virtio_pci_send_ctrl_msg_packed (vlib_main_t * vm, virtio_if_t * vif,
201 virtio_ctrl_msg_t * data, u32 len)
203 virtio_vring_t *vring = vif->cxq_vring;
204 virtio_net_ctrl_ack_t status = VIRTIO_NET_ERR;
205 virtio_ctrl_msg_t result;
209 u16 sz = vring->size;
210 u16 flags = 0, first_desc_flags = 0;
212 used = vring->desc_in_use;
213 next = vring->desc_next;
214 vring_packed_desc_t *d = &vring->packed_desc[next];
216 if (vlib_buffer_alloc (vm, &buffer_index, 1))
217 b = vlib_get_buffer (vm, buffer_index);
219 return VIRTIO_NET_ERR;
221 * current_data may not be initialized with 0 and may contain
225 clib_memcpy (vlib_buffer_get_current (b), data, sizeof (virtio_ctrl_msg_t));
227 first_desc_flags = VRING_DESC_F_NEXT;
228 if (vring->avail_wrap_counter)
230 first_desc_flags |= VRING_DESC_F_AVAIL;
231 first_desc_flags &= ~VRING_DESC_F_USED;
235 first_desc_flags &= ~VRING_DESC_F_AVAIL;
236 first_desc_flags |= VRING_DESC_F_USED;
238 d->addr = vlib_buffer_get_current_pa (vm, b);
239 d->len = sizeof (virtio_net_ctrl_hdr_t);
246 vring->avail_wrap_counter ^= 1;
250 d = &vring->packed_desc[next];
251 flags = VRING_DESC_F_NEXT;
252 if (vring->avail_wrap_counter)
254 flags |= VRING_DESC_F_AVAIL;
255 flags &= ~VRING_DESC_F_USED;
259 flags &= ~VRING_DESC_F_AVAIL;
260 flags |= VRING_DESC_F_USED;
262 d->addr = vlib_buffer_get_current_pa (vm, b) +
263 STRUCT_OFFSET_OF (virtio_ctrl_msg_t, data);
272 vring->avail_wrap_counter ^= 1;
276 d = &vring->packed_desc[next];
277 flags = VRING_DESC_F_WRITE;
278 if (vring->avail_wrap_counter)
280 flags |= VRING_DESC_F_AVAIL;
281 flags &= ~VRING_DESC_F_USED;
285 flags &= ~VRING_DESC_F_AVAIL;
286 flags |= VRING_DESC_F_USED;
288 d->addr = vlib_buffer_get_current_pa (vm, b) +
289 STRUCT_OFFSET_OF (virtio_ctrl_msg_t, status);
290 d->len = sizeof (data->status);
298 vring->avail_wrap_counter ^= 1;
302 CLIB_MEMORY_STORE_BARRIER ();
303 vring->packed_desc[vring->desc_next].flags = first_desc_flags;
304 vring->desc_next = next;
305 vring->desc_in_use = used;
306 CLIB_MEMORY_BARRIER ();
307 if (vring->device_event->flags != VRING_EVENT_F_DISABLE)
309 virtio_kick (vm, vring, vif);
312 u16 last = vring->last_used_idx;
313 d = &vring->packed_desc[last];
318 while ((flags & VRING_DESC_F_AVAIL) != (vring->used_wrap_counter << 7)
319 || (flags & VRING_DESC_F_USED) != (vring->used_wrap_counter << 15));
322 if (last >= vring->size)
324 last = last - vring->size;
325 vring->used_wrap_counter ^= 1;
327 vring->desc_in_use -= 3;
328 vring->last_used_idx = last;
330 CLIB_MEMORY_BARRIER ();
331 clib_memcpy (&result, vlib_buffer_get_current (b),
332 sizeof (virtio_ctrl_msg_t));
333 virtio_log_debug (vif, "ctrl-queue: status %u", result.status);
334 status = result.status;
335 vlib_buffer_free (vm, &buffer_index, 1);
340 virtio_pci_send_ctrl_msg_split (vlib_main_t * vm, virtio_if_t * vif,
341 virtio_ctrl_msg_t * data, u32 len)
343 virtio_vring_t *vring = vif->cxq_vring;
344 virtio_net_ctrl_ack_t status = VIRTIO_NET_ERR;
345 virtio_ctrl_msg_t result;
348 u16 used, next, avail;
349 u16 sz = vring->size;
352 used = vring->desc_in_use;
353 next = vring->desc_next;
354 avail = vring->avail->idx;
355 vring_desc_t *d = &vring->desc[next];
357 if (vlib_buffer_alloc (vm, &buffer_index, 1))
358 b = vlib_get_buffer (vm, buffer_index);
360 return VIRTIO_NET_ERR;
362 * current_data may not be initialized with 0 and may contain
366 clib_memcpy (vlib_buffer_get_current (b), data, sizeof (virtio_ctrl_msg_t));
367 d->flags = VRING_DESC_F_NEXT;
368 d->addr = vlib_buffer_get_current_pa (vm, b);
369 d->len = sizeof (virtio_net_ctrl_hdr_t);
370 vring->avail->ring[avail & mask] = next;
372 next = (next + 1) & mask;
376 d = &vring->desc[next];
377 d->flags = VRING_DESC_F_NEXT;
378 d->addr = vlib_buffer_get_current_pa (vm, b) +
379 STRUCT_OFFSET_OF (virtio_ctrl_msg_t, data);
381 next = (next + 1) & mask;
385 d = &vring->desc[next];
386 d->flags = VRING_DESC_F_WRITE;
387 d->addr = vlib_buffer_get_current_pa (vm, b) +
388 STRUCT_OFFSET_OF (virtio_ctrl_msg_t, status);
389 d->len = sizeof (data->status);
390 next = (next + 1) & mask;
393 CLIB_MEMORY_STORE_BARRIER ();
394 vring->avail->idx = avail;
395 vring->desc_next = next;
396 vring->desc_in_use = used;
398 if ((vring->used->flags & VIRTIO_RING_FLAG_MASK_INT) == 0)
400 virtio_kick (vm, vring, vif);
403 u16 last = vring->last_used_idx, n_left = 0;
404 n_left = vring->used->idx - last;
408 vring_used_elem_t *e = &vring->used->ring[last & mask];
411 d = &vring->desc[slot];
412 while (d->flags & VRING_DESC_F_NEXT)
416 d = &vring->desc[slot];
422 vring->desc_in_use = used;
423 vring->last_used_idx = last;
425 CLIB_MEMORY_BARRIER ();
426 clib_memcpy (&result, vlib_buffer_get_current (b),
427 sizeof (virtio_ctrl_msg_t));
428 virtio_log_debug (vif, "ctrl-queue: status %u", result.status);
429 status = result.status;
430 vlib_buffer_free (vm, &buffer_index, 1);
435 virtio_pci_send_ctrl_msg (vlib_main_t * vm, virtio_if_t * vif,
436 virtio_ctrl_msg_t * data, u32 len)
439 return virtio_pci_send_ctrl_msg_packed (vm, vif, data, len);
441 return virtio_pci_send_ctrl_msg_split (vm, vif, data, len);
445 virtio_pci_disable_offload (vlib_main_t * vm, virtio_if_t * vif)
447 virtio_ctrl_msg_t offload_hdr;
448 virtio_net_ctrl_ack_t status = VIRTIO_NET_ERR;
450 offload_hdr.ctrl.class = VIRTIO_NET_CTRL_GUEST_OFFLOADS;
451 offload_hdr.ctrl.cmd = VIRTIO_NET_CTRL_GUEST_OFFLOADS_SET;
452 offload_hdr.status = VIRTIO_NET_ERR;
454 clib_memcpy (offload_hdr.data, &offloads, sizeof (offloads));
457 virtio_pci_send_ctrl_msg (vm, vif, &offload_hdr, sizeof (offloads));
458 virtio_log_debug (vif, "disable offloads");
459 vif->remote_features = vif->virtio_pci_func->get_device_features (vm, vif);
460 vif->virtio_pci_func->get_driver_features (vm, vif);
465 virtio_pci_enable_checksum_offload (vlib_main_t * vm, virtio_if_t * vif)
467 virtio_ctrl_msg_t csum_offload_hdr;
468 virtio_net_ctrl_ack_t status = VIRTIO_NET_ERR;
470 csum_offload_hdr.ctrl.class = VIRTIO_NET_CTRL_GUEST_OFFLOADS;
471 csum_offload_hdr.ctrl.cmd = VIRTIO_NET_CTRL_GUEST_OFFLOADS_SET;
472 csum_offload_hdr.status = VIRTIO_NET_ERR;
474 offloads |= VIRTIO_FEATURE (VIRTIO_NET_F_GUEST_CSUM);
475 clib_memcpy (csum_offload_hdr.data, &offloads, sizeof (offloads));
478 virtio_pci_send_ctrl_msg (vm, vif, &csum_offload_hdr, sizeof (offloads));
479 virtio_log_debug (vif, "enable checksum offload");
480 vif->remote_features = vif->virtio_pci_func->get_device_features (vm, vif);
481 vif->features = vif->virtio_pci_func->get_driver_features (vm, vif);
486 virtio_pci_enable_gso (vlib_main_t * vm, virtio_if_t * vif)
488 virtio_ctrl_msg_t gso_hdr;
489 virtio_net_ctrl_ack_t status = VIRTIO_NET_ERR;
491 gso_hdr.ctrl.class = VIRTIO_NET_CTRL_GUEST_OFFLOADS;
492 gso_hdr.ctrl.cmd = VIRTIO_NET_CTRL_GUEST_OFFLOADS_SET;
493 gso_hdr.status = VIRTIO_NET_ERR;
494 u64 offloads = VIRTIO_FEATURE (VIRTIO_NET_F_GUEST_CSUM)
495 | VIRTIO_FEATURE (VIRTIO_NET_F_GUEST_TSO4)
496 | VIRTIO_FEATURE (VIRTIO_NET_F_GUEST_TSO6);
497 clib_memcpy (gso_hdr.data, &offloads, sizeof (offloads));
499 status = virtio_pci_send_ctrl_msg (vm, vif, &gso_hdr, sizeof (offloads));
500 virtio_log_debug (vif, "enable gso");
501 vif->remote_features = vif->virtio_pci_func->get_device_features (vm, vif);
502 vif->virtio_pci_func->get_driver_features (vm, vif);
507 virtio_pci_offloads (vlib_main_t * vm, virtio_if_t * vif, int gso_enabled,
508 int csum_offload_enabled)
510 vnet_main_t *vnm = vnet_get_main ();
511 vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, vif->hw_if_index);
513 if ((vif->features & VIRTIO_FEATURE (VIRTIO_NET_F_CTRL_VQ)) &&
514 (vif->features & VIRTIO_FEATURE (VIRTIO_NET_F_CTRL_GUEST_OFFLOADS)))
517 && (vif->features & (VIRTIO_FEATURE (VIRTIO_NET_F_HOST_TSO4) |
518 VIRTIO_FEATURE (VIRTIO_NET_F_HOST_TSO6))))
520 if (virtio_pci_enable_gso (vm, vif))
522 virtio_log_warning (vif, "gso is not enabled");
526 vif->gso_enabled = 1;
527 vif->csum_offload_enabled = 0;
528 hw->flags |= VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO |
529 VNET_HW_INTERFACE_FLAG_SUPPORTS_TX_L4_CKSUM_OFFLOAD;
532 else if (csum_offload_enabled
533 && (vif->features & VIRTIO_FEATURE (VIRTIO_NET_F_CSUM)))
535 if (virtio_pci_enable_checksum_offload (vm, vif))
537 virtio_log_warning (vif, "checksum offload is not enabled");
541 vif->csum_offload_enabled = 1;
542 vif->gso_enabled = 0;
543 hw->flags &= ~VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO;
545 VNET_HW_INTERFACE_FLAG_SUPPORTS_TX_L4_CKSUM_OFFLOAD;
550 if (virtio_pci_disable_offload (vm, vif))
552 virtio_log_warning (vif, "offloads are not disabled");
556 vif->csum_offload_enabled = 0;
557 vif->gso_enabled = 0;
558 hw->flags &= ~(VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO |
559 VNET_HW_INTERFACE_FLAG_SUPPORTS_TX_L4_CKSUM_OFFLOAD);
568 virtio_pci_enable_multiqueue (vlib_main_t * vm, virtio_if_t * vif,
571 virtio_ctrl_msg_t mq_hdr;
572 virtio_net_ctrl_ack_t status = VIRTIO_NET_ERR;
574 mq_hdr.ctrl.class = VIRTIO_NET_CTRL_MQ;
575 mq_hdr.ctrl.cmd = VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET;
576 mq_hdr.status = VIRTIO_NET_ERR;
577 clib_memcpy (mq_hdr.data, &num_queues, sizeof (num_queues));
579 status = virtio_pci_send_ctrl_msg (vm, vif, &mq_hdr, sizeof (num_queues));
580 virtio_log_debug (vif, "multi-queue enable %u queues", num_queues);
585 virtio_pci_queue_size_valid (u16 qsz)
587 if (qsz < 64 || qsz > 4096)
595 virtio_pci_control_vring_packed_init (vlib_main_t * vm, virtio_if_t * vif,
598 clib_error_t *error = 0;
600 virtio_vring_t *vring;
604 queue_size = vif->virtio_pci_func->get_queue_size (vm, vif, queue_num);
606 if (queue_size > 32768)
607 return clib_error_return (0, "ring size must be 32768 or lower");
612 vec_validate_aligned (vif->cxq_vring, 0, CLIB_CACHE_LINE_BYTES);
613 vring = vec_elt_at_index (vif->cxq_vring, 0);
616 (((queue_size * sizeof (vring_packed_desc_t)) +
617 sizeof (vring_desc_event_t) + VIRTIO_PCI_VRING_ALIGN -
618 1) & ~(VIRTIO_PCI_VRING_ALIGN - 1)) + sizeof (vring_desc_event_t);
621 vlib_physmem_alloc_aligned_on_numa (vm, i, VIRTIO_PCI_VRING_ALIGN,
624 return vlib_physmem_last_error (vm);
625 clib_memset (ptr, 0, i);
627 vring->packed_desc = ptr;
629 vring->driver_event = ptr + (queue_size * sizeof (vring_packed_desc_t));
630 vring->driver_event->off_wrap = 0;
631 vring->driver_event->flags = VRING_EVENT_F_DISABLE;
633 vring->device_event =
635 (((queue_size * sizeof (vring_packed_desc_t)) +
636 sizeof (vring_desc_event_t) + VIRTIO_PCI_VRING_ALIGN -
637 1) & ~(VIRTIO_PCI_VRING_ALIGN - 1));
638 vring->device_event->off_wrap = 0;
639 vring->device_event->flags = 0;
641 vring->queue_id = queue_num;
642 vring->size = queue_size;
643 vring->avail_wrap_counter = 1;
644 vring->used_wrap_counter = 1;
646 ASSERT (vring->buffers == 0);
648 virtio_log_debug (vif, "control-queue: number %u, size %u", queue_num,
650 vif->virtio_pci_func->setup_queue (vm, vif, queue_num, (void *) vring);
651 vring->queue_notify_offset =
652 vif->notify_off_multiplier *
653 vif->virtio_pci_func->get_queue_notify_off (vm, vif, queue_num);
654 virtio_log_debug (vif, "queue-notify-offset: number %u, offset %u",
655 queue_num, vring->queue_notify_offset);
660 virtio_pci_control_vring_split_init (vlib_main_t * vm, virtio_if_t * vif,
663 clib_error_t *error = 0;
665 virtio_vring_t *vring;
670 queue_size = vif->virtio_pci_func->get_queue_size (vm, vif, queue_num);
671 if (!virtio_pci_queue_size_valid (queue_size))
672 clib_warning ("queue size is not valid");
674 if (!is_pow2 (queue_size))
675 return clib_error_return (0, "ring size must be power of 2");
677 if (queue_size > 32768)
678 return clib_error_return (0, "ring size must be 32768 or lower");
683 vec_validate_aligned (vif->cxq_vring, 0, CLIB_CACHE_LINE_BYTES);
684 vring = vec_elt_at_index (vif->cxq_vring, 0);
685 i = vring_size (queue_size, VIRTIO_PCI_VRING_ALIGN);
686 i = round_pow2 (i, VIRTIO_PCI_VRING_ALIGN);
688 vlib_physmem_alloc_aligned_on_numa (vm, i, VIRTIO_PCI_VRING_ALIGN,
691 return vlib_physmem_last_error (vm);
692 clib_memset (ptr, 0, i);
693 vring_init (&vr, queue_size, ptr, VIRTIO_PCI_VRING_ALIGN);
694 vring->desc = vr.desc;
695 vring->avail = vr.avail;
696 vring->used = vr.used;
697 vring->queue_id = queue_num;
698 vring->avail->flags = VIRTIO_RING_FLAG_MASK_INT;
700 ASSERT (vring->buffers == 0);
702 vring->size = queue_size;
703 virtio_log_debug (vif, "control-queue: number %u, size %u", queue_num,
705 vif->virtio_pci_func->setup_queue (vm, vif, queue_num, ptr);
706 vring->queue_notify_offset =
707 vif->notify_off_multiplier *
708 vif->virtio_pci_func->get_queue_notify_off (vm, vif, queue_num);
709 virtio_log_debug (vif, "queue-notify-offset: number %u, offset %u",
710 queue_num, vring->queue_notify_offset);
716 virtio_pci_control_vring_init (vlib_main_t * vm, virtio_if_t * vif,
720 return virtio_pci_control_vring_packed_init (vm, vif, queue_num);
722 return virtio_pci_control_vring_split_init (vm, vif, queue_num);
726 virtio_pci_vring_split_init (vlib_main_t * vm, virtio_if_t * vif,
729 vlib_thread_main_t *vtm = vlib_get_thread_main ();
730 clib_error_t *error = 0;
732 virtio_vring_t *vring;
737 queue_size = vif->virtio_pci_func->get_queue_size (vm, vif, queue_num);
738 if (!virtio_pci_queue_size_valid (queue_size))
739 clib_warning ("queue size is not valid");
741 if (!is_pow2 (queue_size))
742 return clib_error_return (0, "ring size must be power of 2");
744 if (queue_size > 32768)
745 return clib_error_return (0, "ring size must be 32768 or lower");
752 vec_validate_aligned (vif->txq_vrings, TX_QUEUE_ACCESS (queue_num),
753 CLIB_CACHE_LINE_BYTES);
754 vring = vec_elt_at_index (vif->txq_vrings, TX_QUEUE_ACCESS (queue_num));
755 if (vif->max_queue_pairs < vtm->n_vlib_mains)
756 clib_spinlock_init (&vring->lockp);
760 vec_validate_aligned (vif->rxq_vrings, RX_QUEUE_ACCESS (queue_num),
761 CLIB_CACHE_LINE_BYTES);
762 vring = vec_elt_at_index (vif->rxq_vrings, RX_QUEUE_ACCESS (queue_num));
764 i = vring_size (queue_size, VIRTIO_PCI_VRING_ALIGN);
765 i = round_pow2 (i, VIRTIO_PCI_VRING_ALIGN);
767 vlib_physmem_alloc_aligned_on_numa (vm, i, VIRTIO_PCI_VRING_ALIGN,
770 return vlib_physmem_last_error (vm);
771 clib_memset (ptr, 0, i);
772 vring_init (&vr, queue_size, ptr, VIRTIO_PCI_VRING_ALIGN);
773 vring->desc = vr.desc;
774 vring->avail = vr.avail;
775 vring->used = vr.used;
776 vring->queue_id = queue_num;
777 vring->avail->flags = VIRTIO_RING_FLAG_MASK_INT;
778 vring->flow_table = 0;
780 ASSERT (vring->buffers == 0);
781 vec_validate_aligned (vring->buffers, queue_size, CLIB_CACHE_LINE_BYTES);
784 virtio_log_debug (vif, "tx-queue: number %u, size %u", queue_num,
786 clib_memset_u32 (vring->buffers, ~0, queue_size);
790 virtio_log_debug (vif, "rx-queue: number %u, size %u", queue_num,
793 vring->size = queue_size;
794 if (vif->virtio_pci_func->setup_queue (vm, vif, queue_num, ptr))
795 return clib_error_return (0, "error in queue address setup");
797 vring->queue_notify_offset =
798 vif->notify_off_multiplier *
799 vif->virtio_pci_func->get_queue_notify_off (vm, vif, queue_num);
800 virtio_log_debug (vif, "queue-notify-offset: number %u, offset %u",
801 queue_num, vring->queue_notify_offset);
806 virtio_pci_vring_packed_init (vlib_main_t * vm, virtio_if_t * vif,
809 vlib_thread_main_t *vtm = vlib_get_thread_main ();
810 clib_error_t *error = 0;
812 virtio_vring_t *vring;
816 queue_size = vif->virtio_pci_func->get_queue_size (vm, vif, queue_num);
818 if (queue_size > 32768)
819 return clib_error_return (0, "ring size must be 32768 or lower");
826 vec_validate_aligned (vif->txq_vrings, TX_QUEUE_ACCESS (queue_num),
827 CLIB_CACHE_LINE_BYTES);
828 vring = vec_elt_at_index (vif->txq_vrings, TX_QUEUE_ACCESS (queue_num));
829 if (vif->max_queue_pairs < vtm->n_vlib_mains)
830 clib_spinlock_init (&vring->lockp);
834 vec_validate_aligned (vif->rxq_vrings, RX_QUEUE_ACCESS (queue_num),
835 CLIB_CACHE_LINE_BYTES);
836 vring = vec_elt_at_index (vif->rxq_vrings, RX_QUEUE_ACCESS (queue_num));
840 (((queue_size * sizeof (vring_packed_desc_t)) +
841 sizeof (vring_desc_event_t) + VIRTIO_PCI_VRING_ALIGN -
842 1) & ~(VIRTIO_PCI_VRING_ALIGN - 1)) + sizeof (vring_desc_event_t);
845 vlib_physmem_alloc_aligned_on_numa (vm, i, VIRTIO_PCI_VRING_ALIGN,
848 return vlib_physmem_last_error (vm);
850 clib_memset (ptr, 0, i);
851 vring->packed_desc = ptr;
853 vring->driver_event = ptr + (queue_size * sizeof (vring_packed_desc_t));
854 vring->driver_event->off_wrap = 0;
855 vring->driver_event->flags = VRING_EVENT_F_DISABLE;
857 vring->device_event =
859 (((queue_size * sizeof (vring_packed_desc_t)) +
860 sizeof (vring_desc_event_t) + VIRTIO_PCI_VRING_ALIGN -
861 1) & ~(VIRTIO_PCI_VRING_ALIGN - 1));
862 vring->device_event->off_wrap = 0;
863 vring->device_event->flags = 0;
865 vring->queue_id = queue_num;
867 vring->avail_wrap_counter = 1;
868 vring->used_wrap_counter = 1;
870 ASSERT (vring->buffers == 0);
871 vec_validate_aligned (vring->buffers, queue_size, CLIB_CACHE_LINE_BYTES);
874 virtio_log_debug (vif, "tx-queue: number %u, size %u", queue_num,
876 clib_memset_u32 (vring->buffers, ~0, queue_size);
880 virtio_log_debug (vif, "rx-queue: number %u, size %u", queue_num,
883 vring->size = queue_size;
884 if (vif->virtio_pci_func->setup_queue (vm, vif, queue_num, (void *) vring))
885 return clib_error_return (0, "error in queue address setup");
887 vring->queue_notify_offset =
888 vif->notify_off_multiplier *
889 vif->virtio_pci_func->get_queue_notify_off (vm, vif, queue_num);
890 virtio_log_debug (vif, "queue-notify-offset: number %u, offset %u",
891 queue_num, vring->queue_notify_offset);
897 virtio_pci_vring_init (vlib_main_t * vm, virtio_if_t * vif, u16 queue_num)
900 return virtio_pci_vring_packed_init (vm, vif, queue_num);
902 return virtio_pci_vring_split_init (vm, vif, queue_num);
906 virtio_negotiate_features (vlib_main_t * vm, virtio_if_t * vif,
910 * if features are not requested
911 * default: all supported features
913 u64 supported_features = VIRTIO_FEATURE (VIRTIO_NET_F_CSUM)
914 | VIRTIO_FEATURE (VIRTIO_NET_F_GUEST_CSUM)
915 | VIRTIO_FEATURE (VIRTIO_NET_F_CTRL_GUEST_OFFLOADS)
916 | VIRTIO_FEATURE (VIRTIO_NET_F_MTU)
917 | VIRTIO_FEATURE (VIRTIO_NET_F_MAC)
918 | VIRTIO_FEATURE (VIRTIO_NET_F_GSO)
919 | VIRTIO_FEATURE (VIRTIO_NET_F_GUEST_TSO4)
920 | VIRTIO_FEATURE (VIRTIO_NET_F_GUEST_TSO6)
921 | VIRTIO_FEATURE (VIRTIO_NET_F_GUEST_UFO)
922 | VIRTIO_FEATURE (VIRTIO_NET_F_HOST_TSO4)
923 | VIRTIO_FEATURE (VIRTIO_NET_F_HOST_TSO6)
924 | VIRTIO_FEATURE (VIRTIO_NET_F_HOST_UFO)
925 | VIRTIO_FEATURE (VIRTIO_NET_F_MRG_RXBUF)
926 | VIRTIO_FEATURE (VIRTIO_NET_F_STATUS)
927 | VIRTIO_FEATURE (VIRTIO_NET_F_CTRL_VQ)
928 | VIRTIO_FEATURE (VIRTIO_NET_F_MQ)
929 | VIRTIO_FEATURE (VIRTIO_F_NOTIFY_ON_EMPTY)
930 | VIRTIO_FEATURE (VIRTIO_F_ANY_LAYOUT)
931 | VIRTIO_FEATURE (VIRTIO_RING_F_INDIRECT_DESC);
934 supported_features |= VIRTIO_FEATURE (VIRTIO_F_VERSION_1);
938 supported_features |=
939 (VIRTIO_FEATURE (VIRTIO_F_RING_PACKED) |
940 VIRTIO_FEATURE (VIRTIO_F_IN_ORDER));
943 if (req_features == 0)
945 req_features = supported_features;
948 vif->features = req_features & vif->remote_features & supported_features;
950 if (vif->features & VIRTIO_FEATURE (VIRTIO_NET_F_MTU))
953 mtu = vif->virtio_pci_func->get_mtu (vm, vif);
956 vif->features &= ~VIRTIO_FEATURE (VIRTIO_NET_F_MTU);
959 if ((vif->features & (VIRTIO_FEATURE (VIRTIO_F_RING_PACKED))) == 0)
962 vif->virtio_pci_func->set_driver_features (vm, vif, vif->features);
963 vif->features = vif->virtio_pci_func->get_driver_features (vm, vif);
967 virtio_pci_read_device_feature (vlib_main_t * vm, virtio_if_t * vif)
969 vif->remote_features = vif->virtio_pci_func->get_device_features (vm, vif);
973 virtio_pci_reset_device (vlib_main_t * vm, virtio_if_t * vif)
980 status = vif->virtio_pci_func->device_reset (vm, vif);
983 * Set the Acknowledge status bit
985 vif->virtio_pci_func->set_status (vm, vif, VIRTIO_CONFIG_STATUS_ACK);
988 * Set the Driver status bit
990 vif->virtio_pci_func->set_status (vm, vif, VIRTIO_CONFIG_STATUS_DRIVER);
993 * Read the status and verify it
995 status = vif->virtio_pci_func->get_status (vm, vif);
996 if ((status & VIRTIO_CONFIG_STATUS_ACK)
997 && (status & VIRTIO_CONFIG_STATUS_DRIVER))
998 vif->status = status;
1006 virtio_pci_read_caps (vlib_main_t * vm, virtio_if_t * vif, void **bar)
1008 clib_error_t *error = 0;
1009 virtio_pci_cap_t cap;
1010 u8 pos, common_cfg = 0, notify = 0, dev_cfg = 0, isr = 0, pci_cfg = 0;
1011 vlib_pci_dev_handle_t h = vif->pci_dev_handle;
1013 if ((error = vlib_pci_read_config_u8 (vm, h, PCI_CAPABILITY_LIST, &pos)))
1015 virtio_log_error (vif, "error in reading capabilty list position");
1016 return clib_error_return (error,
1017 "error in reading capabilty list position");
1022 vlib_pci_read_write_config (vm, h, VLIB_READ, pos, &cap,
1025 virtio_log_error (vif, "%s [%2x]",
1026 "error in reading the capability at", pos);
1027 return clib_error_return (error,
1028 "error in reading the capability at [%2x]",
1032 if (cap.cap_vndr == PCI_CAP_ID_MSIX)
1034 u16 flags, table_size, table_size_mask = 0x07FF;
1037 vlib_pci_read_write_config (vm, h, VLIB_READ, pos + 2, &flags,
1039 return clib_error_return (error,
1040 "error in reading the capability at [%2x]",
1043 table_size = flags & table_size_mask;
1044 virtio_log_debug (vif, "flags:0x%x %s 0x%x", flags,
1045 "msix interrupt vector table-size", table_size);
1047 if (flags & PCI_MSIX_ENABLE)
1049 virtio_log_debug (vif, "msix interrupt enabled");
1050 vif->msix_enabled = VIRTIO_MSIX_ENABLED;
1051 vif->msix_table_size = table_size;
1055 virtio_log_debug (vif, "msix interrupt disabled");
1056 vif->msix_enabled = VIRTIO_MSIX_DISABLED;
1057 vif->msix_table_size = 0;
1061 if (cap.cap_vndr != PCI_CAP_ID_VNDR)
1063 virtio_log_debug (vif, "[%2x] %s %2x ", pos,
1064 "skipping non VNDR cap id:", cap.cap_vndr);
1068 virtio_log_debug (vif,
1069 "[%4x] cfg type: %u, bar: %u, offset: %04x, len: %u",
1070 pos, cap.cfg_type, cap.bar, cap.offset, cap.length);
1072 if (cap.bar >= 0 && cap.bar <= 5)
1074 vif->bar = bar[cap.bar];
1075 vif->bar_id = cap.bar;
1078 return clib_error_return (error, "invalid bar %u", cap.bar);
1080 switch (cap.cfg_type)
1082 case VIRTIO_PCI_CAP_COMMON_CFG:
1083 vif->common_offset = cap.offset;
1086 case VIRTIO_PCI_CAP_NOTIFY_CFG:
1088 vlib_pci_read_write_config (vm, h, VLIB_READ,
1090 &vif->notify_off_multiplier,
1092 (vif->notify_off_multiplier))))
1094 virtio_log_error (vif, "notify off multiplier is not given");
1098 virtio_log_debug (vif, "notify off multiplier is %u",
1099 vif->notify_off_multiplier);
1100 vif->notify_offset = cap.offset;
1104 case VIRTIO_PCI_CAP_DEVICE_CFG:
1105 vif->device_offset = cap.offset;
1108 case VIRTIO_PCI_CAP_ISR_CFG:
1109 vif->isr_offset = cap.offset;
1112 case VIRTIO_PCI_CAP_PCI_CFG:
1121 if (common_cfg == 0 || notify == 0 || dev_cfg == 0 || isr == 0)
1123 vif->virtio_pci_func = &virtio_pci_legacy_func;
1124 vif->notify_off_multiplier = 0;
1125 virtio_log_debug (vif, "legacy virtio pci device found");
1130 vif->virtio_pci_func = &virtio_pci_modern_func;
1134 virtio_log_debug (vif, "modern virtio pci device found");
1138 virtio_log_debug (vif, "transitional virtio pci device found");
1144 static clib_error_t *
1145 virtio_pci_device_init (vlib_main_t * vm, virtio_if_t * vif,
1146 virtio_pci_create_if_args_t * args, void **bar)
1148 clib_error_t *error = 0;
1149 vlib_thread_main_t *vtm = vlib_get_thread_main ();
1152 if ((error = virtio_pci_read_caps (vm, vif, bar)))
1154 args->rv = VNET_API_ERROR_UNSUPPORTED;
1155 virtio_log_error (vif, "Device is not supported");
1156 return clib_error_return (error, "Device is not supported");
1159 if (virtio_pci_reset_device (vm, vif) < 0)
1161 args->rv = VNET_API_ERROR_INIT_FAILED;
1162 virtio_log_error (vif, "Failed to reset the device");
1163 return clib_error_return (error, "Failed to reset the device");
1166 * read device features and negotiate (user) requested features
1168 virtio_pci_read_device_feature (vm, vif);
1169 if ((vif->remote_features & VIRTIO_FEATURE (VIRTIO_RING_F_INDIRECT_DESC)) ==
1172 virtio_log_warning (vif, "error encountered: vhost-net backend doesn't "
1173 "support VIRTIO_RING_F_INDIRECT_DESC features");
1175 if ((vif->remote_features & VIRTIO_FEATURE (VIRTIO_NET_F_MRG_RXBUF)) == 0)
1177 virtio_log_warning (vif, "error encountered: vhost-net backend doesn't "
1178 "support VIRTIO_NET_F_MRG_RXBUF features");
1180 virtio_negotiate_features (vm, vif, args->features);
1183 * After FEATURE_OK, driver should not accept new feature bits
1185 vif->virtio_pci_func->set_status (vm, vif,
1186 VIRTIO_CONFIG_STATUS_FEATURES_OK);
1187 status = vif->virtio_pci_func->get_status (vm, vif);
1188 if (!(status & VIRTIO_CONFIG_STATUS_FEATURES_OK))
1190 args->rv = VNET_API_ERROR_UNSUPPORTED;
1191 virtio_log_error (vif,
1192 "error encountered: Device doesn't support requested features");
1193 return clib_error_return (error,
1194 "Device doesn't support requested features");
1196 vif->status = status;
1199 * get or set the mac address
1201 if (virtio_pci_get_mac (vm, vif))
1203 f64 now = vlib_time_now (vm);
1205 rnd = (u32) (now * 1e6);
1206 rnd = random_u32 (&rnd);
1208 memcpy (vif->mac_addr + 2, &rnd, sizeof (rnd));
1209 vif->mac_addr[0] = 2;
1210 vif->mac_addr[1] = 0xfe;
1211 virtio_pci_set_mac (vm, vif);
1214 virtio_set_net_hdr_size (vif);
1217 * Initialize the virtqueues
1219 if ((error = virtio_pci_get_max_virtqueue_pairs (vm, vif)))
1221 args->rv = VNET_API_ERROR_EXCEEDED_NUMBER_OF_RANGES_CAPACITY;
1225 if (vif->msix_enabled == VIRTIO_MSIX_ENABLED)
1227 if (vif->msix_table_size <= vif->max_queue_pairs)
1229 virtio_log_error (vif,
1230 "error MSIX lines (%u) <= Number of RXQs (%u)",
1231 vif->msix_table_size, vif->max_queue_pairs);
1232 return clib_error_return (error,
1233 "error MSIX lines (%u) <= Number of RXQs (%u)",
1234 vif->msix_table_size,
1235 vif->max_queue_pairs);
1239 for (int i = 0; i < vif->max_queue_pairs; i++)
1241 if ((error = virtio_pci_vring_init (vm, vif, RX_QUEUE (i))))
1243 args->rv = VNET_API_ERROR_INIT_FAILED;
1244 virtio_log_error (vif, "%s (%u) %s", "error in rxq-queue",
1245 RX_QUEUE (i), "initialization");
1247 clib_error_return (error, "%s (%u) %s", "error in rxq-queue",
1248 RX_QUEUE (i), "initialization");
1256 if (i >= vtm->n_vlib_mains)
1259 * There is 1:1 mapping between tx queue and vpp worker thread.
1260 * tx queue 0 is bind with thread index 0, tx queue 1 on thread
1261 * index 1 and so on.
1262 * Multiple worker threads can poll same tx queue when number of
1263 * workers are more than tx queues. In this case, 1:N mapping
1264 * between tx queue and vpp worker thread.
1266 virtio_log_debug (vif, "%s %u, %s", "tx-queue: number",
1268 "no VPP worker thread is available");
1272 if ((error = virtio_pci_vring_init (vm, vif, TX_QUEUE (i))))
1274 args->rv = VNET_API_ERROR_INIT_FAILED;
1275 virtio_log_error (vif, "%s (%u) %s", "error in txq-queue",
1276 TX_QUEUE (i), "initialization");
1278 clib_error_return (error, "%s (%u) %s", "error in txq-queue",
1279 TX_QUEUE (i), "initialization");
1288 if (vif->features & VIRTIO_FEATURE (VIRTIO_NET_F_CTRL_VQ))
1291 virtio_pci_control_vring_init (vm, vif, vif->max_queue_pairs * 2)))
1293 virtio_log_warning (vif, "%s (%u) %s", "error in control-queue",
1294 vif->max_queue_pairs * 2, "initialization");
1295 if (vif->features & VIRTIO_FEATURE (VIRTIO_NET_F_MQ))
1296 vif->features &= ~VIRTIO_FEATURE (VIRTIO_NET_F_MQ);
1301 virtio_log_debug (vif, "control queue is not available");
1302 vif->cxq_vring = NULL;
1306 * set the msix interrupts
1308 if (vif->msix_enabled == VIRTIO_MSIX_ENABLED)
1311 if (vif->virtio_pci_func->set_config_irq (vm, vif, 0) ==
1312 VIRTIO_MSI_NO_VECTOR)
1314 virtio_log_warning (vif, "config vector 0 is not set");
1318 virtio_log_debug (vif, "config msix vector is set at 0");
1320 for (i = 0, j = 1; i < vif->max_queue_pairs; i++, j++)
1322 if (vif->virtio_pci_func->set_queue_irq (vm, vif, j,
1324 VIRTIO_MSI_NO_VECTOR)
1326 virtio_log_warning (vif, "queue (%u) vector is not set at %u",
1331 virtio_log_debug (vif, "%s (%u) %s %u", "queue",
1332 RX_QUEUE (i), "msix vector is set at", j);
1338 * set the driver status OK
1340 vif->virtio_pci_func->set_status (vm, vif, VIRTIO_CONFIG_STATUS_DRIVER_OK);
1341 vif->status = vif->virtio_pci_func->get_status (vm, vif);
1347 virtio_pci_create_if (vlib_main_t * vm, virtio_pci_create_if_args_t * args)
1349 vnet_main_t *vnm = vnet_get_main ();
1350 virtio_main_t *vim = &virtio_main;
1352 vlib_pci_dev_handle_t h;
1353 clib_error_t *error = 0;
1354 u32 interrupt_count = 0;
1357 pool_foreach (vif, vim->interfaces) {
1358 if (vif->pci_addr.as_u32 == args->addr)
1360 args->rv = VNET_API_ERROR_ADDRESS_IN_USE;
1362 clib_error_return (error, "PCI address in use");
1363 vlib_log (VLIB_LOG_LEVEL_ERR, vim->log_default, "%U: %s",
1364 format_vlib_pci_addr, &args->addr,
1365 " PCI address in use");
1371 pool_get (vim->interfaces, vif);
1372 vif->dev_instance = vif - vim->interfaces;
1373 vif->per_interface_next_index = ~0;
1374 vif->pci_addr.as_u32 = args->addr;
1375 if (args->virtio_flags & VIRTIO_FLAG_PACKED)
1379 vlib_pci_device_open (vm, (vlib_pci_addr_t *) & vif->pci_addr,
1380 virtio_pci_device_ids, &h)))
1382 args->rv = VNET_API_ERROR_INVALID_INTERFACE;
1384 clib_error_return (error, "pci-addr %U", format_vlib_pci_addr,
1386 vlib_log (VLIB_LOG_LEVEL_ERR, vim->log_default, "%U: %s",
1387 format_vlib_pci_addr, &vif->pci_addr,
1388 "error encountered on pci device open");
1389 pool_put (vim->interfaces, vif);
1392 vif->pci_dev_handle = h;
1393 vlib_pci_set_private_data (vm, h, vif->dev_instance);
1394 vif->numa_node = vlib_pci_get_numa_node (vm, h);
1395 vif->type = VIRTIO_IF_TYPE_PCI;
1397 if ((error = vlib_pci_bus_master_enable (vm, h)))
1399 virtio_log_error (vif, "error encountered on pci bus master enable");
1404 for (u32 i = 0; i <= 5; i++)
1407 if ((error = vlib_pci_map_region (vm, h, i, &bar[i])))
1409 virtio_log_debug (vif, "no pci map region for bar %u", i);
1413 virtio_log_debug (vif, "pci map region for bar %u at %p", i,
1418 if ((error = vlib_pci_io_region (vm, h, 0)))
1420 virtio_log_error (vif, "error encountered on pci io region");
1424 interrupt_count = vlib_pci_get_num_msix_interrupts (vm, h);
1425 if (interrupt_count > 1)
1427 if ((error = vlib_pci_register_msix_handler (vm, h, 0, 1,
1428 &virtio_pci_irq_config_handler)))
1430 args->rv = VNET_API_ERROR_INVALID_REGISTRATION;
1431 virtio_log_error (vif,
1432 "error encountered on pci register msix handler 0");
1437 vlib_pci_register_msix_handler (vm, h, 1, (interrupt_count - 1),
1438 &virtio_pci_irq_queue_handler)))
1440 args->rv = VNET_API_ERROR_INVALID_REGISTRATION;
1441 virtio_log_error (vif,
1442 "error encountered on pci register msix handler 1");
1446 if ((error = vlib_pci_enable_msix_irq (vm, h, 0, interrupt_count)))
1448 virtio_log_error (vif, "error encountered on pci enable msix irq");
1451 vif->support_int_mode = 1;
1452 virtio_log_debug (vif, "device supports msix interrupts");
1454 else if (interrupt_count == 1)
1457 * if msix table-size is 1, fall back to intX.
1460 vlib_pci_register_intx_handler (vm, h, &virtio_pci_irq_handler)))
1462 virtio_log_error (vif,
1463 "error encountered on pci register interrupt handler");
1466 vif->support_int_mode = 1;
1467 virtio_log_debug (vif, "pci register interrupt handler");
1472 * WARN: intX is showing some weird behaviour.
1473 * Please don't use interrupt mode with UIO driver.
1475 vif->support_int_mode = 0;
1476 virtio_log_debug (vif, "driver is configured in poll mode only");
1479 if ((error = vlib_pci_intr_enable (vm, h)))
1481 virtio_log_error (vif, "error encountered on pci interrupt enable");
1485 if ((error = virtio_pci_device_init (vm, vif, args, bar)))
1487 virtio_log_error (vif, "error encountered on device init");
1491 /* create interface */
1492 error = ethernet_register_interface (vnm, virtio_device_class.index,
1493 vif->dev_instance, vif->mac_addr,
1495 virtio_pci_flag_change);
1499 args->rv = VNET_API_ERROR_INVALID_REGISTRATION;
1500 virtio_log_error (vif,
1501 "error encountered on ethernet register interface");
1505 vnet_sw_interface_t *sw = vnet_get_hw_sw_interface (vnm, vif->hw_if_index);
1506 vif->sw_if_index = sw->sw_if_index;
1507 args->sw_if_index = sw->sw_if_index;
1509 vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, vif->hw_if_index);
1510 hw->flags |= VNET_HW_INTERFACE_FLAG_SUPPORTS_INT_MODE;
1512 if (args->virtio_flags & VIRTIO_FLAG_BUFFERING)
1514 error = virtio_set_packet_buffering (vif, args->buffering_size);
1517 args->rv = VNET_API_ERROR_INIT_FAILED;
1518 virtio_log_error (vif,
1519 "error encountered during packet buffering init");
1524 virtio_vring_set_rx_queues (vm, vif);
1526 if (virtio_pci_is_link_up (vm, vif) & VIRTIO_NET_S_LINK_UP)
1528 vif->flags |= VIRTIO_IF_FLAG_ADMIN_UP;
1529 vnet_hw_interface_set_flags (vnm, vif->hw_if_index,
1530 VNET_HW_INTERFACE_FLAG_LINK_UP);
1533 vnet_hw_interface_set_flags (vnm, vif->hw_if_index, 0);
1535 virtio_pci_offloads (vm, vif, args->gso_enabled,
1536 args->checksum_offload_enabled);
1538 if ((vif->features & VIRTIO_FEATURE (VIRTIO_NET_F_CTRL_VQ)) &&
1539 (vif->features & VIRTIO_FEATURE (VIRTIO_NET_F_MQ)))
1541 if (virtio_pci_enable_multiqueue (vm, vif, vif->max_queue_pairs))
1542 virtio_log_warning (vif, "multiqueue is not set");
1547 virtio_pci_delete_if (vm, vif);
1549 args->rv = VNET_API_ERROR_INVALID_INTERFACE;
1550 args->error = error;
1554 virtio_pci_delete_if (vlib_main_t * vm, virtio_if_t * vif)
1556 vnet_main_t *vnm = vnet_get_main ();
1557 virtio_main_t *vim = &virtio_main;
1560 if (vif->type != VIRTIO_IF_TYPE_PCI)
1561 return VNET_API_ERROR_INVALID_INTERFACE;
1563 vlib_pci_intr_disable (vm, vif->pci_dev_handle);
1565 for (i = 0; i < vif->max_queue_pairs; i++)
1567 vif->virtio_pci_func->del_queue (vm, vif, RX_QUEUE (i));
1568 vif->virtio_pci_func->del_queue (vm, vif, TX_QUEUE (i));
1571 if (vif->features & VIRTIO_FEATURE (VIRTIO_NET_F_CTRL_VQ))
1572 vif->virtio_pci_func->del_queue (vm, vif, vif->max_queue_pairs * 2);
1574 if (vif->virtio_pci_func)
1575 vif->virtio_pci_func->device_reset (vm, vif);
1577 if (vif->hw_if_index)
1579 vnet_hw_interface_set_flags (vnm, vif->hw_if_index, 0);
1580 ethernet_delete_interface (vnm, vif->hw_if_index);
1583 vlib_pci_device_close (vm, vif->pci_dev_handle);
1585 vec_foreach_index (i, vif->rxq_vrings)
1587 virtio_vring_t *vring = vec_elt_at_index (vif->rxq_vrings, i);
1590 virtio_free_buffers (vm, vring);
1592 vec_free (vring->buffers);
1593 vlib_physmem_free (vm, vring->desc);
1596 vec_foreach_index (i, vif->txq_vrings)
1598 virtio_vring_t *vring = vec_elt_at_index (vif->txq_vrings, i);
1601 virtio_free_buffers (vm, vring);
1603 vec_free (vring->buffers);
1604 gro_flow_table_free (vring->flow_table);
1605 virtio_vring_buffering_free (vm, vring->buffering);
1606 clib_spinlock_free (&vring->lockp);
1607 vlib_physmem_free (vm, vring->desc);
1610 if (vif->cxq_vring != NULL)
1612 u16 last = vif->cxq_vring->last_used_idx;
1613 u16 n_left = vif->cxq_vring->used->idx - last;
1620 vif->cxq_vring->last_used_idx = last;
1621 vlib_physmem_free (vm, vif->cxq_vring->desc);
1624 vec_free (vif->rxq_vrings);
1625 vec_free (vif->txq_vrings);
1626 vec_free (vif->cxq_vring);
1628 clib_error_free (vif->error);
1629 memset (vif, 0, sizeof (*vif));
1630 pool_put (vim->interfaces, vif);
1636 virtio_pci_enable_disable_offloads (vlib_main_t * vm, virtio_if_t * vif,
1638 int checksum_offload_enabled,
1639 int offloads_disabled)
1641 if (vif->type != VIRTIO_IF_TYPE_PCI)
1642 return VNET_API_ERROR_INVALID_INTERFACE;
1645 virtio_pci_offloads (vm, vif, 1, 0);
1646 else if (checksum_offload_enabled)
1647 virtio_pci_offloads (vm, vif, 0, 1);
1648 else if (offloads_disabled)
1649 virtio_pci_offloads (vm, vif, 0, 0);
1655 * fd.io coding-style-patch-verification: ON
1658 * eval: (c-set-style "gnu")