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->caps |= VNET_HW_INTERFACE_CAP_SUPPORTS_TCP_GSO |
529 VNET_HW_INTERFACE_CAP_SUPPORTS_TX_TCP_CKSUM |
530 VNET_HW_INTERFACE_CAP_SUPPORTS_TX_UDP_CKSUM;
533 else if (csum_offload_enabled
534 && (vif->features & VIRTIO_FEATURE (VIRTIO_NET_F_CSUM)))
536 if (virtio_pci_enable_checksum_offload (vm, vif))
538 virtio_log_warning (vif, "checksum offload is not enabled");
542 vif->csum_offload_enabled = 1;
543 vif->gso_enabled = 0;
544 hw->caps &= ~VNET_HW_INTERFACE_CAP_SUPPORTS_TCP_GSO;
545 hw->caps |= VNET_HW_INTERFACE_CAP_SUPPORTS_TX_TCP_CKSUM |
546 VNET_HW_INTERFACE_CAP_SUPPORTS_TX_UDP_CKSUM;
551 if (virtio_pci_disable_offload (vm, vif))
553 virtio_log_warning (vif, "offloads are not disabled");
557 vif->csum_offload_enabled = 0;
558 vif->gso_enabled = 0;
559 hw->caps &= ~(VNET_HW_INTERFACE_CAP_SUPPORTS_L4_TX_CKSUM |
560 VNET_HW_INTERFACE_CAP_SUPPORTS_TCP_GSO);
569 virtio_pci_enable_multiqueue (vlib_main_t * vm, virtio_if_t * vif,
572 virtio_ctrl_msg_t mq_hdr;
573 virtio_net_ctrl_ack_t status = VIRTIO_NET_ERR;
575 mq_hdr.ctrl.class = VIRTIO_NET_CTRL_MQ;
576 mq_hdr.ctrl.cmd = VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET;
577 mq_hdr.status = VIRTIO_NET_ERR;
578 clib_memcpy (mq_hdr.data, &num_queues, sizeof (num_queues));
580 status = virtio_pci_send_ctrl_msg (vm, vif, &mq_hdr, sizeof (num_queues));
581 virtio_log_debug (vif, "multi-queue enable %u queues", num_queues);
586 virtio_pci_queue_size_valid (u16 qsz)
588 if (qsz < 64 || qsz > 4096)
596 virtio_pci_control_vring_packed_init (vlib_main_t * vm, virtio_if_t * vif,
599 clib_error_t *error = 0;
601 virtio_vring_t *vring;
605 queue_size = vif->virtio_pci_func->get_queue_size (vm, vif, queue_num);
607 if (queue_size > 32768)
608 return clib_error_return (0, "ring size must be 32768 or lower");
613 vec_validate_aligned (vif->cxq_vring, 0, CLIB_CACHE_LINE_BYTES);
614 vring = vec_elt_at_index (vif->cxq_vring, 0);
617 (((queue_size * sizeof (vring_packed_desc_t)) +
618 sizeof (vring_desc_event_t) + VIRTIO_PCI_VRING_ALIGN -
619 1) & ~(VIRTIO_PCI_VRING_ALIGN - 1)) + sizeof (vring_desc_event_t);
622 vlib_physmem_alloc_aligned_on_numa (vm, i, VIRTIO_PCI_VRING_ALIGN,
625 return vlib_physmem_last_error (vm);
626 clib_memset (ptr, 0, i);
628 vring->packed_desc = ptr;
630 vring->driver_event = ptr + (queue_size * sizeof (vring_packed_desc_t));
631 vring->driver_event->off_wrap = 0;
632 vring->driver_event->flags = VRING_EVENT_F_DISABLE;
634 vring->device_event =
636 (((queue_size * sizeof (vring_packed_desc_t)) +
637 sizeof (vring_desc_event_t) + VIRTIO_PCI_VRING_ALIGN -
638 1) & ~(VIRTIO_PCI_VRING_ALIGN - 1));
639 vring->device_event->off_wrap = 0;
640 vring->device_event->flags = 0;
642 vring->queue_id = queue_num;
643 vring->size = queue_size;
644 vring->avail_wrap_counter = 1;
645 vring->used_wrap_counter = 1;
647 ASSERT (vring->buffers == 0);
649 virtio_log_debug (vif, "control-queue: number %u, size %u", queue_num,
651 vif->virtio_pci_func->setup_queue (vm, vif, queue_num, (void *) vring);
652 vring->queue_notify_offset =
653 vif->notify_off_multiplier *
654 vif->virtio_pci_func->get_queue_notify_off (vm, vif, queue_num);
655 virtio_log_debug (vif, "queue-notify-offset: number %u, offset %u",
656 queue_num, vring->queue_notify_offset);
661 virtio_pci_control_vring_split_init (vlib_main_t * vm, virtio_if_t * vif,
664 clib_error_t *error = 0;
666 virtio_vring_t *vring;
671 queue_size = vif->virtio_pci_func->get_queue_size (vm, vif, queue_num);
672 if (!virtio_pci_queue_size_valid (queue_size))
673 clib_warning ("queue size is not valid");
675 if (!is_pow2 (queue_size))
676 return clib_error_return (0, "ring size must be power of 2");
678 if (queue_size > 32768)
679 return clib_error_return (0, "ring size must be 32768 or lower");
684 vec_validate_aligned (vif->cxq_vring, 0, CLIB_CACHE_LINE_BYTES);
685 vring = vec_elt_at_index (vif->cxq_vring, 0);
686 i = vring_size (queue_size, VIRTIO_PCI_VRING_ALIGN);
687 i = round_pow2 (i, VIRTIO_PCI_VRING_ALIGN);
689 vlib_physmem_alloc_aligned_on_numa (vm, i, VIRTIO_PCI_VRING_ALIGN,
692 return vlib_physmem_last_error (vm);
693 clib_memset (ptr, 0, i);
694 vring_init (&vr, queue_size, ptr, VIRTIO_PCI_VRING_ALIGN);
695 vring->desc = vr.desc;
696 vring->avail = vr.avail;
697 vring->used = vr.used;
698 vring->queue_id = queue_num;
699 vring->avail->flags = VIRTIO_RING_FLAG_MASK_INT;
701 ASSERT (vring->buffers == 0);
703 vring->size = queue_size;
704 virtio_log_debug (vif, "control-queue: number %u, size %u", queue_num,
706 vif->virtio_pci_func->setup_queue (vm, vif, queue_num, ptr);
707 vring->queue_notify_offset =
708 vif->notify_off_multiplier *
709 vif->virtio_pci_func->get_queue_notify_off (vm, vif, queue_num);
710 virtio_log_debug (vif, "queue-notify-offset: number %u, offset %u",
711 queue_num, vring->queue_notify_offset);
717 virtio_pci_control_vring_init (vlib_main_t * vm, virtio_if_t * vif,
721 return virtio_pci_control_vring_packed_init (vm, vif, queue_num);
723 return virtio_pci_control_vring_split_init (vm, vif, queue_num);
727 virtio_pci_vring_split_init (vlib_main_t * vm, virtio_if_t * vif,
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 clib_spinlock_init (&vring->lockp);
759 vec_validate_aligned (vif->rxq_vrings, RX_QUEUE_ACCESS (queue_num),
760 CLIB_CACHE_LINE_BYTES);
761 vring = vec_elt_at_index (vif->rxq_vrings, RX_QUEUE_ACCESS (queue_num));
763 i = vring_size (queue_size, VIRTIO_PCI_VRING_ALIGN);
764 i = round_pow2 (i, VIRTIO_PCI_VRING_ALIGN);
766 vlib_physmem_alloc_aligned_on_numa (vm, i, VIRTIO_PCI_VRING_ALIGN,
769 return vlib_physmem_last_error (vm);
770 clib_memset (ptr, 0, i);
771 vring_init (&vr, queue_size, ptr, VIRTIO_PCI_VRING_ALIGN);
772 vring->desc = vr.desc;
773 vring->avail = vr.avail;
774 vring->used = vr.used;
775 vring->queue_id = queue_num;
776 vring->avail->flags = VIRTIO_RING_FLAG_MASK_INT;
777 vring->flow_table = 0;
779 ASSERT (vring->buffers == 0);
780 vec_validate_aligned (vring->buffers, queue_size, CLIB_CACHE_LINE_BYTES);
783 virtio_log_debug (vif, "tx-queue: number %u, size %u", queue_num,
785 clib_memset_u32 (vring->buffers, ~0, queue_size);
789 virtio_log_debug (vif, "rx-queue: number %u, size %u", queue_num,
792 vring->size = queue_size;
793 if (vif->virtio_pci_func->setup_queue (vm, vif, queue_num, ptr))
794 return clib_error_return (0, "error in queue address setup");
796 vring->queue_notify_offset =
797 vif->notify_off_multiplier *
798 vif->virtio_pci_func->get_queue_notify_off (vm, vif, queue_num);
799 virtio_log_debug (vif, "queue-notify-offset: number %u, offset %u",
800 queue_num, vring->queue_notify_offset);
805 virtio_pci_vring_packed_init (vlib_main_t * vm, virtio_if_t * vif,
808 clib_error_t *error = 0;
810 virtio_vring_t *vring;
814 queue_size = vif->virtio_pci_func->get_queue_size (vm, vif, queue_num);
816 if (queue_size > 32768)
817 return clib_error_return (0, "ring size must be 32768 or lower");
824 vec_validate_aligned (vif->txq_vrings, TX_QUEUE_ACCESS (queue_num),
825 CLIB_CACHE_LINE_BYTES);
826 vring = vec_elt_at_index (vif->txq_vrings, TX_QUEUE_ACCESS (queue_num));
827 clib_spinlock_init (&vring->lockp);
831 vec_validate_aligned (vif->rxq_vrings, RX_QUEUE_ACCESS (queue_num),
832 CLIB_CACHE_LINE_BYTES);
833 vring = vec_elt_at_index (vif->rxq_vrings, RX_QUEUE_ACCESS (queue_num));
837 (((queue_size * sizeof (vring_packed_desc_t)) +
838 sizeof (vring_desc_event_t) + VIRTIO_PCI_VRING_ALIGN -
839 1) & ~(VIRTIO_PCI_VRING_ALIGN - 1)) + sizeof (vring_desc_event_t);
842 vlib_physmem_alloc_aligned_on_numa (vm, i, VIRTIO_PCI_VRING_ALIGN,
845 return vlib_physmem_last_error (vm);
847 clib_memset (ptr, 0, i);
848 vring->packed_desc = ptr;
850 vring->driver_event = ptr + (queue_size * sizeof (vring_packed_desc_t));
851 vring->driver_event->off_wrap = 0;
852 vring->driver_event->flags = VRING_EVENT_F_DISABLE;
854 vring->device_event =
856 (((queue_size * sizeof (vring_packed_desc_t)) +
857 sizeof (vring_desc_event_t) + VIRTIO_PCI_VRING_ALIGN -
858 1) & ~(VIRTIO_PCI_VRING_ALIGN - 1));
859 vring->device_event->off_wrap = 0;
860 vring->device_event->flags = 0;
862 vring->queue_id = queue_num;
864 vring->avail_wrap_counter = 1;
865 vring->used_wrap_counter = 1;
867 ASSERT (vring->buffers == 0);
868 vec_validate_aligned (vring->buffers, queue_size, CLIB_CACHE_LINE_BYTES);
871 virtio_log_debug (vif, "tx-queue: number %u, size %u", queue_num,
873 clib_memset_u32 (vring->buffers, ~0, queue_size);
877 virtio_log_debug (vif, "rx-queue: number %u, size %u", queue_num,
880 vring->size = queue_size;
881 if (vif->virtio_pci_func->setup_queue (vm, vif, queue_num, (void *) vring))
882 return clib_error_return (0, "error in queue address setup");
884 vring->queue_notify_offset =
885 vif->notify_off_multiplier *
886 vif->virtio_pci_func->get_queue_notify_off (vm, vif, queue_num);
887 virtio_log_debug (vif, "queue-notify-offset: number %u, offset %u",
888 queue_num, vring->queue_notify_offset);
894 virtio_pci_vring_init (vlib_main_t * vm, virtio_if_t * vif, u16 queue_num)
897 return virtio_pci_vring_packed_init (vm, vif, queue_num);
899 return virtio_pci_vring_split_init (vm, vif, queue_num);
903 virtio_negotiate_features (vlib_main_t * vm, virtio_if_t * vif,
907 * if features are not requested
908 * default: all supported features
910 u64 supported_features = VIRTIO_FEATURE (VIRTIO_NET_F_CSUM)
911 | VIRTIO_FEATURE (VIRTIO_NET_F_GUEST_CSUM)
912 | VIRTIO_FEATURE (VIRTIO_NET_F_CTRL_GUEST_OFFLOADS)
913 | VIRTIO_FEATURE (VIRTIO_NET_F_MTU)
914 | VIRTIO_FEATURE (VIRTIO_NET_F_MAC)
915 | VIRTIO_FEATURE (VIRTIO_NET_F_GSO)
916 | VIRTIO_FEATURE (VIRTIO_NET_F_GUEST_TSO4)
917 | VIRTIO_FEATURE (VIRTIO_NET_F_GUEST_TSO6)
918 | VIRTIO_FEATURE (VIRTIO_NET_F_GUEST_UFO)
919 | VIRTIO_FEATURE (VIRTIO_NET_F_HOST_TSO4)
920 | VIRTIO_FEATURE (VIRTIO_NET_F_HOST_TSO6)
921 | VIRTIO_FEATURE (VIRTIO_NET_F_HOST_UFO)
922 | VIRTIO_FEATURE (VIRTIO_NET_F_MRG_RXBUF)
923 | VIRTIO_FEATURE (VIRTIO_NET_F_STATUS)
924 | VIRTIO_FEATURE (VIRTIO_NET_F_CTRL_VQ)
925 | VIRTIO_FEATURE (VIRTIO_NET_F_MQ)
926 | VIRTIO_FEATURE (VIRTIO_F_NOTIFY_ON_EMPTY)
927 | VIRTIO_FEATURE (VIRTIO_F_ANY_LAYOUT)
928 | VIRTIO_FEATURE (VIRTIO_RING_F_INDIRECT_DESC);
931 supported_features |= VIRTIO_FEATURE (VIRTIO_F_VERSION_1);
935 supported_features |=
936 (VIRTIO_FEATURE (VIRTIO_F_RING_PACKED) |
937 VIRTIO_FEATURE (VIRTIO_F_IN_ORDER));
940 if (req_features == 0)
942 req_features = supported_features;
945 vif->features = req_features & vif->remote_features & supported_features;
947 if (vif->features & VIRTIO_FEATURE (VIRTIO_NET_F_MTU))
950 mtu = vif->virtio_pci_func->get_mtu (vm, vif);
953 vif->features &= ~VIRTIO_FEATURE (VIRTIO_NET_F_MTU);
956 if ((vif->features & (VIRTIO_FEATURE (VIRTIO_F_RING_PACKED))) == 0)
959 vif->virtio_pci_func->set_driver_features (vm, vif, vif->features);
960 vif->features = vif->virtio_pci_func->get_driver_features (vm, vif);
964 virtio_pci_read_device_feature (vlib_main_t * vm, virtio_if_t * vif)
966 vif->remote_features = vif->virtio_pci_func->get_device_features (vm, vif);
970 virtio_pci_reset_device (vlib_main_t * vm, virtio_if_t * vif)
977 status = vif->virtio_pci_func->device_reset (vm, vif);
980 * Set the Acknowledge status bit
982 vif->virtio_pci_func->set_status (vm, vif, VIRTIO_CONFIG_STATUS_ACK);
985 * Set the Driver status bit
987 vif->virtio_pci_func->set_status (vm, vif, VIRTIO_CONFIG_STATUS_DRIVER);
990 * Read the status and verify it
992 status = vif->virtio_pci_func->get_status (vm, vif);
993 if ((status & VIRTIO_CONFIG_STATUS_ACK)
994 && (status & VIRTIO_CONFIG_STATUS_DRIVER))
995 vif->status = status;
1003 virtio_pci_read_caps (vlib_main_t * vm, virtio_if_t * vif, void **bar)
1005 clib_error_t *error = 0;
1006 virtio_pci_cap_t cap;
1007 u8 pos, common_cfg = 0, notify = 0, dev_cfg = 0, isr = 0, pci_cfg = 0;
1008 vlib_pci_dev_handle_t h = vif->pci_dev_handle;
1010 if ((error = vlib_pci_read_config_u8 (vm, h, PCI_CAPABILITY_LIST, &pos)))
1012 virtio_log_error (vif, "error in reading capabilty list position");
1013 return clib_error_return (error,
1014 "error in reading capabilty list position");
1019 vlib_pci_read_write_config (vm, h, VLIB_READ, pos, &cap,
1022 virtio_log_error (vif, "%s [%2x]",
1023 "error in reading the capability at", pos);
1024 return clib_error_return (error,
1025 "error in reading the capability at [%2x]",
1029 if (cap.cap_vndr == PCI_CAP_ID_MSIX)
1031 u16 flags, table_size, table_size_mask = 0x07FF;
1034 vlib_pci_read_write_config (vm, h, VLIB_READ, pos + 2, &flags,
1036 return clib_error_return (error,
1037 "error in reading the capability at [%2x]",
1040 table_size = flags & table_size_mask;
1041 virtio_log_debug (vif, "flags:0x%x %s 0x%x", flags,
1042 "msix interrupt vector table-size", table_size);
1044 if (flags & PCI_MSIX_ENABLE)
1046 virtio_log_debug (vif, "msix interrupt enabled");
1047 vif->msix_enabled = VIRTIO_MSIX_ENABLED;
1048 vif->msix_table_size = table_size;
1052 virtio_log_debug (vif, "msix interrupt disabled");
1053 vif->msix_enabled = VIRTIO_MSIX_DISABLED;
1054 vif->msix_table_size = 0;
1058 if (cap.cap_vndr != PCI_CAP_ID_VNDR)
1060 virtio_log_debug (vif, "[%2x] %s %2x ", pos,
1061 "skipping non VNDR cap id:", cap.cap_vndr);
1065 virtio_log_debug (vif,
1066 "[%4x] cfg type: %u, bar: %u, offset: %04x, len: %u",
1067 pos, cap.cfg_type, cap.bar, cap.offset, cap.length);
1069 if (cap.bar >= 0 && cap.bar <= 5)
1071 vif->bar = bar[cap.bar];
1072 vif->bar_id = cap.bar;
1075 return clib_error_return (error, "invalid bar %u", cap.bar);
1077 switch (cap.cfg_type)
1079 case VIRTIO_PCI_CAP_COMMON_CFG:
1080 vif->common_offset = cap.offset;
1083 case VIRTIO_PCI_CAP_NOTIFY_CFG:
1085 vlib_pci_read_write_config (vm, h, VLIB_READ,
1087 &vif->notify_off_multiplier,
1089 (vif->notify_off_multiplier))))
1091 virtio_log_error (vif, "notify off multiplier is not given");
1095 virtio_log_debug (vif, "notify off multiplier is %u",
1096 vif->notify_off_multiplier);
1097 vif->notify_offset = cap.offset;
1101 case VIRTIO_PCI_CAP_DEVICE_CFG:
1102 vif->device_offset = cap.offset;
1105 case VIRTIO_PCI_CAP_ISR_CFG:
1106 vif->isr_offset = cap.offset;
1109 case VIRTIO_PCI_CAP_PCI_CFG:
1118 if (common_cfg == 0 || notify == 0 || dev_cfg == 0 || isr == 0)
1120 vif->virtio_pci_func = &virtio_pci_legacy_func;
1121 vif->notify_off_multiplier = 0;
1122 virtio_log_debug (vif, "legacy virtio pci device found");
1127 vif->virtio_pci_func = &virtio_pci_modern_func;
1131 virtio_log_debug (vif, "modern virtio pci device found");
1135 virtio_log_debug (vif, "transitional virtio pci device found");
1141 static clib_error_t *
1142 virtio_pci_device_init (vlib_main_t * vm, virtio_if_t * vif,
1143 virtio_pci_create_if_args_t * args, void **bar)
1145 clib_error_t *error = 0;
1148 if ((error = virtio_pci_read_caps (vm, vif, bar)))
1150 args->rv = VNET_API_ERROR_UNSUPPORTED;
1151 virtio_log_error (vif, "Device is not supported");
1152 return clib_error_return (error, "Device is not supported");
1155 if (virtio_pci_reset_device (vm, vif) < 0)
1157 args->rv = VNET_API_ERROR_INIT_FAILED;
1158 virtio_log_error (vif, "Failed to reset the device");
1159 return clib_error_return (error, "Failed to reset the device");
1162 * read device features and negotiate (user) requested features
1164 virtio_pci_read_device_feature (vm, vif);
1165 if ((vif->remote_features & VIRTIO_FEATURE (VIRTIO_RING_F_INDIRECT_DESC)) ==
1168 virtio_log_warning (vif, "error encountered: vhost-net backend doesn't "
1169 "support VIRTIO_RING_F_INDIRECT_DESC features");
1171 if ((vif->remote_features & VIRTIO_FEATURE (VIRTIO_NET_F_MRG_RXBUF)) == 0)
1173 virtio_log_warning (vif, "error encountered: vhost-net backend doesn't "
1174 "support VIRTIO_NET_F_MRG_RXBUF features");
1176 virtio_negotiate_features (vm, vif, args->features);
1179 * After FEATURE_OK, driver should not accept new feature bits
1181 vif->virtio_pci_func->set_status (vm, vif,
1182 VIRTIO_CONFIG_STATUS_FEATURES_OK);
1183 status = vif->virtio_pci_func->get_status (vm, vif);
1184 if (!(status & VIRTIO_CONFIG_STATUS_FEATURES_OK))
1186 args->rv = VNET_API_ERROR_UNSUPPORTED;
1187 virtio_log_error (vif,
1188 "error encountered: Device doesn't support requested features");
1189 return clib_error_return (error,
1190 "Device doesn't support requested features");
1192 vif->status = status;
1195 * get or set the mac address
1197 if (virtio_pci_get_mac (vm, vif))
1199 f64 now = vlib_time_now (vm);
1201 rnd = (u32) (now * 1e6);
1202 rnd = random_u32 (&rnd);
1204 memcpy (vif->mac_addr + 2, &rnd, sizeof (rnd));
1205 vif->mac_addr[0] = 2;
1206 vif->mac_addr[1] = 0xfe;
1207 virtio_pci_set_mac (vm, vif);
1210 virtio_set_net_hdr_size (vif);
1213 * Initialize the virtqueues
1215 if ((error = virtio_pci_get_max_virtqueue_pairs (vm, vif)))
1217 args->rv = VNET_API_ERROR_EXCEEDED_NUMBER_OF_RANGES_CAPACITY;
1221 if (vif->msix_enabled == VIRTIO_MSIX_ENABLED)
1223 if (vif->msix_table_size <= vif->max_queue_pairs)
1225 virtio_log_error (vif,
1226 "error MSIX lines (%u) <= Number of RXQs (%u)",
1227 vif->msix_table_size, vif->max_queue_pairs);
1228 return clib_error_return (error,
1229 "error MSIX lines (%u) <= Number of RXQs (%u)",
1230 vif->msix_table_size,
1231 vif->max_queue_pairs);
1235 for (int i = 0; i < vif->max_queue_pairs; i++)
1237 if ((error = virtio_pci_vring_init (vm, vif, RX_QUEUE (i))))
1239 args->rv = VNET_API_ERROR_INIT_FAILED;
1240 virtio_log_error (vif, "%s (%u) %s", "error in rxq-queue",
1241 RX_QUEUE (i), "initialization");
1243 clib_error_return (error, "%s (%u) %s", "error in rxq-queue",
1244 RX_QUEUE (i), "initialization");
1252 if ((error = virtio_pci_vring_init (vm, vif, TX_QUEUE (i))))
1254 args->rv = VNET_API_ERROR_INIT_FAILED;
1255 virtio_log_error (vif, "%s (%u) %s", "error in txq-queue",
1256 TX_QUEUE (i), "initialization");
1258 clib_error_return (error, "%s (%u) %s", "error in txq-queue",
1259 TX_QUEUE (i), "initialization");
1268 if (vif->features & VIRTIO_FEATURE (VIRTIO_NET_F_CTRL_VQ))
1271 virtio_pci_control_vring_init (vm, vif, vif->max_queue_pairs * 2)))
1273 virtio_log_warning (vif, "%s (%u) %s", "error in control-queue",
1274 vif->max_queue_pairs * 2, "initialization");
1275 if (vif->features & VIRTIO_FEATURE (VIRTIO_NET_F_MQ))
1276 vif->features &= ~VIRTIO_FEATURE (VIRTIO_NET_F_MQ);
1281 virtio_log_debug (vif, "control queue is not available");
1282 vif->cxq_vring = NULL;
1286 * set the msix interrupts
1288 if (vif->msix_enabled == VIRTIO_MSIX_ENABLED)
1291 if (vif->virtio_pci_func->set_config_irq (vm, vif, 0) ==
1292 VIRTIO_MSI_NO_VECTOR)
1294 virtio_log_warning (vif, "config vector 0 is not set");
1298 virtio_log_debug (vif, "config msix vector is set at 0");
1300 for (i = 0, j = 1; i < vif->max_queue_pairs; i++, j++)
1302 if (vif->virtio_pci_func->set_queue_irq (vm, vif, j,
1304 VIRTIO_MSI_NO_VECTOR)
1306 virtio_log_warning (vif, "queue (%u) vector is not set at %u",
1311 virtio_log_debug (vif, "%s (%u) %s %u", "queue",
1312 RX_QUEUE (i), "msix vector is set at", j);
1318 * set the driver status OK
1320 vif->virtio_pci_func->set_status (vm, vif, VIRTIO_CONFIG_STATUS_DRIVER_OK);
1321 vif->status = vif->virtio_pci_func->get_status (vm, vif);
1327 virtio_pci_create_if (vlib_main_t * vm, virtio_pci_create_if_args_t * args)
1329 vnet_main_t *vnm = vnet_get_main ();
1330 virtio_main_t *vim = &virtio_main;
1332 vlib_pci_dev_handle_t h;
1333 clib_error_t *error = 0;
1334 u32 interrupt_count = 0;
1337 pool_foreach (vif, vim->interfaces) {
1338 if (vif->pci_addr.as_u32 == args->addr)
1340 args->rv = VNET_API_ERROR_ADDRESS_IN_USE;
1342 clib_error_return (error, "PCI address in use");
1343 vlib_log (VLIB_LOG_LEVEL_ERR, vim->log_default, "%U: %s",
1344 format_vlib_pci_addr, &args->addr,
1345 " PCI address in use");
1351 pool_get (vim->interfaces, vif);
1352 vif->dev_instance = vif - vim->interfaces;
1353 vif->per_interface_next_index = ~0;
1354 vif->pci_addr.as_u32 = args->addr;
1355 if (args->virtio_flags & VIRTIO_FLAG_PACKED)
1359 vlib_pci_device_open (vm, (vlib_pci_addr_t *) & vif->pci_addr,
1360 virtio_pci_device_ids, &h)))
1362 args->rv = VNET_API_ERROR_INVALID_INTERFACE;
1364 clib_error_return (error, "pci-addr %U", format_vlib_pci_addr,
1366 vlib_log (VLIB_LOG_LEVEL_ERR, vim->log_default, "%U: %s",
1367 format_vlib_pci_addr, &vif->pci_addr,
1368 "error encountered on pci device open");
1369 pool_put (vim->interfaces, vif);
1372 vif->pci_dev_handle = h;
1373 vlib_pci_set_private_data (vm, h, vif->dev_instance);
1374 vif->numa_node = vlib_pci_get_numa_node (vm, h);
1375 vif->type = VIRTIO_IF_TYPE_PCI;
1377 if ((error = vlib_pci_bus_master_enable (vm, h)))
1379 virtio_log_error (vif, "error encountered on pci bus master enable");
1384 for (u32 i = 0; i <= 5; i++)
1387 if ((error = vlib_pci_map_region (vm, h, i, &bar[i])))
1389 virtio_log_debug (vif, "no pci map region for bar %u", i);
1393 virtio_log_debug (vif, "pci map region for bar %u at %p", i,
1398 if ((error = vlib_pci_io_region (vm, h, 0)))
1400 virtio_log_error (vif, "error encountered on pci io region");
1404 interrupt_count = vlib_pci_get_num_msix_interrupts (vm, h);
1405 if (interrupt_count > 1)
1407 if ((error = vlib_pci_register_msix_handler (vm, h, 0, 1,
1408 &virtio_pci_irq_config_handler)))
1410 args->rv = VNET_API_ERROR_INVALID_REGISTRATION;
1411 virtio_log_error (vif,
1412 "error encountered on pci register msix handler 0");
1417 vlib_pci_register_msix_handler (vm, h, 1, (interrupt_count - 1),
1418 &virtio_pci_irq_queue_handler)))
1420 args->rv = VNET_API_ERROR_INVALID_REGISTRATION;
1421 virtio_log_error (vif,
1422 "error encountered on pci register msix handler 1");
1426 if ((error = vlib_pci_enable_msix_irq (vm, h, 0, interrupt_count)))
1428 virtio_log_error (vif, "error encountered on pci enable msix irq");
1431 vif->support_int_mode = 1;
1432 virtio_log_debug (vif, "device supports msix interrupts");
1437 * WARN: performance will be sub-optimal.
1438 * Fall back to intX, if msix table-size is 1 or
1439 * if UIO driver is being used.
1442 vlib_pci_register_intx_handler (vm, h, &virtio_pci_irq_handler)))
1444 virtio_log_error (vif,
1445 "error encountered on pci register interrupt handler");
1448 vif->support_int_mode = 1;
1449 virtio_log_debug (vif, "pci register interrupt handler");
1452 if ((error = vlib_pci_intr_enable (vm, h)))
1454 virtio_log_error (vif, "error encountered on pci interrupt enable");
1458 if ((error = virtio_pci_device_init (vm, vif, args, bar)))
1460 virtio_log_error (vif, "error encountered on device init");
1464 /* create interface */
1465 error = ethernet_register_interface (vnm, virtio_device_class.index,
1466 vif->dev_instance, vif->mac_addr,
1468 virtio_pci_flag_change);
1472 args->rv = VNET_API_ERROR_INVALID_REGISTRATION;
1473 virtio_log_error (vif,
1474 "error encountered on ethernet register interface");
1478 vnet_sw_interface_t *sw = vnet_get_hw_sw_interface (vnm, vif->hw_if_index);
1479 vif->sw_if_index = sw->sw_if_index;
1480 args->sw_if_index = sw->sw_if_index;
1482 vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, vif->hw_if_index);
1483 hw->caps |= VNET_HW_INTERFACE_CAP_SUPPORTS_INT_MODE;
1485 if (args->virtio_flags & VIRTIO_FLAG_BUFFERING)
1487 error = virtio_set_packet_buffering (vif, args->buffering_size);
1490 args->rv = VNET_API_ERROR_INIT_FAILED;
1491 virtio_log_error (vif,
1492 "error encountered during packet buffering init");
1497 virtio_pre_input_node_enable (vm, vif);
1498 virtio_vring_set_rx_queues (vm, vif);
1499 virtio_vring_set_tx_queues (vm, vif);
1501 if (virtio_pci_is_link_up (vm, vif) & VIRTIO_NET_S_LINK_UP)
1503 vif->flags |= VIRTIO_IF_FLAG_ADMIN_UP;
1504 vnet_hw_interface_set_flags (vnm, vif->hw_if_index,
1505 VNET_HW_INTERFACE_FLAG_LINK_UP);
1508 vnet_hw_interface_set_flags (vnm, vif->hw_if_index, 0);
1510 virtio_pci_offloads (vm, vif, args->gso_enabled,
1511 args->checksum_offload_enabled);
1513 if ((vif->features & VIRTIO_FEATURE (VIRTIO_NET_F_CTRL_VQ)) &&
1514 (vif->features & VIRTIO_FEATURE (VIRTIO_NET_F_MQ)))
1516 if (virtio_pci_enable_multiqueue (vm, vif, vif->max_queue_pairs))
1517 virtio_log_warning (vif, "multiqueue is not set");
1522 virtio_pci_delete_if (vm, vif);
1524 args->rv = VNET_API_ERROR_INVALID_INTERFACE;
1525 args->error = error;
1529 virtio_pci_delete_if (vlib_main_t * vm, virtio_if_t * vif)
1531 vnet_main_t *vnm = vnet_get_main ();
1532 virtio_main_t *vim = &virtio_main;
1535 if (vif->type != VIRTIO_IF_TYPE_PCI)
1536 return VNET_API_ERROR_INVALID_INTERFACE;
1538 vlib_pci_intr_disable (vm, vif->pci_dev_handle);
1540 for (i = 0; i < vif->max_queue_pairs; i++)
1542 vif->virtio_pci_func->del_queue (vm, vif, RX_QUEUE (i));
1543 vif->virtio_pci_func->del_queue (vm, vif, TX_QUEUE (i));
1546 if (vif->features & VIRTIO_FEATURE (VIRTIO_NET_F_CTRL_VQ))
1547 vif->virtio_pci_func->del_queue (vm, vif, vif->max_queue_pairs * 2);
1549 if (vif->virtio_pci_func)
1550 vif->virtio_pci_func->device_reset (vm, vif);
1552 if (vif->hw_if_index)
1554 vnet_hw_interface_set_flags (vnm, vif->hw_if_index, 0);
1555 ethernet_delete_interface (vnm, vif->hw_if_index);
1558 vlib_pci_device_close (vm, vif->pci_dev_handle);
1560 vec_foreach_index (i, vif->rxq_vrings)
1562 virtio_vring_t *vring = vec_elt_at_index (vif->rxq_vrings, i);
1565 virtio_free_buffers (vm, vring);
1567 vec_free (vring->buffers);
1568 vlib_physmem_free (vm, vring->desc);
1571 virtio_pre_input_node_disable (vm, vif);
1573 vec_foreach_index (i, vif->txq_vrings)
1575 virtio_vring_t *vring = vec_elt_at_index (vif->txq_vrings, i);
1578 virtio_free_buffers (vm, vring);
1580 vec_free (vring->buffers);
1581 gro_flow_table_free (vring->flow_table);
1582 virtio_vring_buffering_free (vm, vring->buffering);
1583 clib_spinlock_free (&vring->lockp);
1584 vlib_physmem_free (vm, vring->desc);
1587 if (vif->cxq_vring != NULL)
1589 u16 last = vif->cxq_vring->last_used_idx;
1590 u16 n_left = vif->cxq_vring->used->idx - last;
1597 vif->cxq_vring->last_used_idx = last;
1598 vlib_physmem_free (vm, vif->cxq_vring->desc);
1601 vec_free (vif->rxq_vrings);
1602 vec_free (vif->txq_vrings);
1603 vec_free (vif->cxq_vring);
1605 clib_error_free (vif->error);
1606 memset (vif, 0, sizeof (*vif));
1607 pool_put (vim->interfaces, vif);
1613 virtio_pci_enable_disable_offloads (vlib_main_t * vm, virtio_if_t * vif,
1615 int checksum_offload_enabled,
1616 int offloads_disabled)
1618 if (vif->type != VIRTIO_IF_TYPE_PCI)
1619 return VNET_API_ERROR_INVALID_INTERFACE;
1622 virtio_pci_offloads (vm, vif, 1, 0);
1623 else if (checksum_offload_enabled)
1624 virtio_pci_offloads (vm, vif, 0, 1);
1625 else if (offloads_disabled)
1626 virtio_pci_offloads (vm, vif, 0, 0);
1632 * fd.io coding-style-patch-verification: ON
1635 * eval: (c-set-style "gnu")