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>
28 #define PCI_VENDOR_ID_VIRTIO 0x1af4
29 #define PCI_DEVICE_ID_VIRTIO_NIC 0x1000
30 /* Doesn't support modern device */
31 #define PCI_DEVICE_ID_VIRTIO_NIC_MODERN 0x1041
33 #define PCI_CAPABILITY_LIST 0x34
34 #define PCI_CAP_ID_VNDR 0x09
35 #define PCI_CAP_ID_MSIX 0x11
37 #define PCI_MSIX_ENABLE 0x8000
39 #define PCI_CONFIG_SIZE(vif) ((vif->msix_enabled == VIRTIO_MSIX_ENABLED) ? \
42 static pci_device_id_t virtio_pci_device_ids[] = {
44 .vendor_id = PCI_VENDOR_ID_VIRTIO,
45 .device_id = PCI_DEVICE_ID_VIRTIO_NIC},
47 .vendor_id = PCI_VENDOR_ID_VIRTIO,
48 .device_id = PCI_DEVICE_ID_VIRTIO_NIC_MODERN},
53 virtio_pci_legacy_read_config (vlib_main_t * vm, virtio_if_t * vif, void *dst,
57 vlib_pci_dev_handle_t h = vif->pci_dev_handle;
64 vlib_pci_read_io_u32 (vm, h, PCI_CONFIG_SIZE (vif) + addr, dst);
69 vlib_pci_read_io_u16 (vm, h, PCI_CONFIG_SIZE (vif) + addr, dst);
74 vlib_pci_read_io_u8 (vm, h, PCI_CONFIG_SIZE (vif) + addr, dst);
76 dst = (u8 *) dst + size;
83 virtio_pci_legacy_write_config (vlib_main_t * vm, virtio_if_t * vif,
84 void *src, int len, u32 addr)
87 vlib_pci_dev_handle_t h = vif->pci_dev_handle;
94 vlib_pci_write_io_u32 (vm, h, PCI_CONFIG_SIZE (vif) + addr, src);
99 vlib_pci_write_io_u16 (vm, h, PCI_CONFIG_SIZE (vif) + addr, src);
104 vlib_pci_write_io_u8 (vm, h, PCI_CONFIG_SIZE (vif) + addr, src);
106 src = (u8 *) src + size;
113 virtio_pci_legacy_get_host_features (vlib_main_t * vm, virtio_if_t * vif)
116 vlib_pci_read_io_u32 (vm, vif->pci_dev_handle, VIRTIO_PCI_HOST_FEATURES,
122 virtio_pci_legacy_get_guest_features (vlib_main_t * vm, virtio_if_t * vif)
125 vlib_pci_read_io_u32 (vm, vif->pci_dev_handle, VIRTIO_PCI_GUEST_FEATURES,
127 vif->features = feature;
132 virtio_pci_legacy_set_guest_features (vlib_main_t * vm, virtio_if_t * vif,
135 if ((features >> 32) != 0)
137 clib_warning ("only 32 bit features are allowed for legacy virtio!");
139 u32 feature = 0, guest_features = (u32) features;
140 vlib_pci_write_io_u32 (vm, vif->pci_dev_handle, VIRTIO_PCI_GUEST_FEATURES,
142 vlib_pci_read_io_u32 (vm, vif->pci_dev_handle, VIRTIO_PCI_GUEST_FEATURES,
148 virtio_pci_legacy_get_status (vlib_main_t * vm, virtio_if_t * vif)
151 vlib_pci_read_io_u8 (vm, vif->pci_dev_handle, VIRTIO_PCI_STATUS, &status);
156 virtio_pci_legacy_set_status (vlib_main_t * vm, virtio_if_t * vif, u8 status)
158 if (status != VIRTIO_CONFIG_STATUS_RESET)
159 status |= virtio_pci_legacy_get_status (vm, vif);
160 vlib_pci_write_io_u8 (vm, vif->pci_dev_handle, VIRTIO_PCI_STATUS, &status);
164 virtio_pci_legacy_reset (vlib_main_t * vm, virtio_if_t * vif)
166 virtio_pci_legacy_set_status (vm, vif, VIRTIO_CONFIG_STATUS_RESET);
167 return virtio_pci_legacy_get_status (vm, vif);
171 virtio_pci_legacy_get_isr (vlib_main_t * vm, virtio_if_t * vif)
174 vlib_pci_read_io_u8 (vm, vif->pci_dev_handle, VIRTIO_PCI_ISR, &isr);
179 virtio_pci_legacy_get_queue_num (vlib_main_t * vm, virtio_if_t * vif,
183 vlib_pci_write_io_u16 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_SEL,
185 vlib_pci_read_io_u16 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_NUM,
191 virtio_pci_legacy_setup_queue (vlib_main_t * vm, virtio_if_t * vif,
192 u16 queue_id, void *p)
194 u64 addr = vlib_physmem_get_pa (vm, p) >> VIRTIO_PCI_QUEUE_ADDR_SHIFT;
196 vlib_pci_write_io_u16 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_SEL,
198 vlib_pci_write_io_u32 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_PFN,
200 vlib_pci_read_io_u32 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_PFN,
202 if ((u32) addr == addr2)
208 virtio_pci_legacy_del_queue (vlib_main_t * vm, virtio_if_t * vif,
212 vlib_pci_write_io_u16 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_SEL,
214 vlib_pci_write_io_u32 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_PFN, &src);
218 virtio_pci_legacy_notify_queue (vlib_main_t * vm, virtio_if_t * vif,
221 vlib_pci_write_io_u16 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_NOTIFY,
225 /* Enable one vector (0) for Link State Intrerrupt */
227 virtio_pci_legacy_set_config_irq (vlib_main_t * vm, virtio_if_t * vif,
230 vlib_pci_write_io_u16 (vm, vif->pci_dev_handle, VIRTIO_MSI_CONFIG_VECTOR,
232 vlib_pci_read_io_u16 (vm, vif->pci_dev_handle, VIRTIO_MSI_CONFIG_VECTOR,
238 virtio_pci_legacy_set_queue_irq (vlib_main_t * vm, virtio_if_t * vif, u16 vec,
241 vlib_pci_write_io_u16 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_SEL,
243 vlib_pci_write_io_u16 (vm, vif->pci_dev_handle, VIRTIO_MSI_QUEUE_VECTOR,
245 vlib_pci_read_io_u16 (vm, vif->pci_dev_handle, VIRTIO_MSI_QUEUE_VECTOR,
251 virtio_pci_flag_change (vnet_main_t * vnm, vnet_hw_interface_t * hw,
257 static clib_error_t *
258 virtio_pci_get_max_virtqueue_pairs (vlib_main_t * vm, virtio_if_t * vif)
260 virtio_net_config_t config;
261 clib_error_t *error = 0;
262 u16 max_queue_pairs = 1;
264 if (vif->features & VIRTIO_FEATURE (VIRTIO_NET_F_MQ))
266 virtio_pci_legacy_read_config (vm, vif, &config.max_virtqueue_pairs,
267 sizeof (config.max_virtqueue_pairs),
268 STRUCT_OFFSET_OF (virtio_net_config_t,
269 max_virtqueue_pairs));
270 max_queue_pairs = config.max_virtqueue_pairs;
273 virtio_log_debug (vif, "max queue pair is %x", max_queue_pairs);
274 if (max_queue_pairs < 1 || max_queue_pairs > 0x8000)
275 return clib_error_return (error, "max queue pair is %x,"
276 " should be in range [1, 0x8000]",
279 vif->max_queue_pairs = max_queue_pairs;
284 virtio_pci_set_mac (vlib_main_t * vm, virtio_if_t * vif)
286 virtio_pci_legacy_write_config (vm, vif, vif->mac_addr,
287 sizeof (vif->mac_addr), 0);
291 virtio_pci_get_mac (vlib_main_t * vm, virtio_if_t * vif)
293 if (vif->features & VIRTIO_FEATURE (VIRTIO_NET_F_MAC))
295 virtio_pci_legacy_read_config (vm, vif, vif->mac_addr,
296 sizeof (vif->mac_addr), 0);
303 virtio_pci_is_link_up (vlib_main_t * vm, virtio_if_t * vif)
306 * Minimal driver: assumes link is up
309 if (vif->features & VIRTIO_FEATURE (VIRTIO_NET_F_STATUS))
310 virtio_pci_legacy_read_config (vm, vif, &status, sizeof (status), /* mac */
311 STRUCT_OFFSET_OF (virtio_net_config_t,
317 virtio_pci_irq_queue_handler (vlib_main_t * vm, vlib_pci_dev_handle_t h,
320 vnet_main_t *vnm = vnet_get_main ();
321 virtio_main_t *vim = &virtio_main;
322 uword pd = vlib_pci_get_private_data (vm, h);
323 virtio_if_t *vif = pool_elt_at_index (vim->interfaces, pd);
327 vnet_device_input_set_interrupt_pending (vnm, vif->hw_if_index, qid);
331 virtio_pci_irq_config_handler (vlib_main_t * vm, vlib_pci_dev_handle_t h,
334 vnet_main_t *vnm = vnet_get_main ();
335 virtio_main_t *vim = &virtio_main;
336 uword pd = vlib_pci_get_private_data (vm, h);
337 virtio_if_t *vif = pool_elt_at_index (vim->interfaces, pd);
339 if (virtio_pci_is_link_up (vm, vif) & VIRTIO_NET_S_LINK_UP)
341 vif->flags |= VIRTIO_IF_FLAG_ADMIN_UP;
342 vnet_hw_interface_set_flags (vnm, vif->hw_if_index,
343 VNET_HW_INTERFACE_FLAG_LINK_UP);
347 vif->flags &= ~VIRTIO_IF_FLAG_ADMIN_UP;
348 vnet_hw_interface_set_flags (vnm, vif->hw_if_index, 0);
353 virtio_pci_irq_handler (vlib_main_t * vm, vlib_pci_dev_handle_t h)
355 virtio_main_t *vim = &virtio_main;
356 uword pd = vlib_pci_get_private_data (vm, h);
357 virtio_if_t *vif = pool_elt_at_index (vim->interfaces, pd);
361 isr = virtio_pci_legacy_get_isr (vm, vif);
364 * If the lower bit is set: look through the used rings of
365 * all virtqueues for the device, to see if any progress has
366 * been made by the device which requires servicing.
368 if (isr & VIRTIO_PCI_ISR_INTR)
370 for (; line < vif->num_rxqs; line++)
371 virtio_pci_irq_queue_handler (vm, h, (line + 1));
374 if (isr & VIRTIO_PCI_ISR_CONFIG)
375 virtio_pci_irq_config_handler (vm, h, line);
379 device_status (vlib_main_t * vm, virtio_if_t * vif)
386 struct status_struct *status_entry;
387 static struct status_struct status_array[] = {
388 #define _(s,b) { .str = #s, .bit = b, },
389 foreach_virtio_config_status_flags
394 vlib_cli_output (vm, " status 0x%x", vif->status);
396 status_entry = (struct status_struct *) &status_array;
397 while (status_entry->str)
399 if (vif->status & status_entry->bit)
400 vlib_cli_output (vm, " %s (%x)", status_entry->str,
407 debug_device_config_space (vlib_main_t * vm, virtio_if_t * vif)
412 vlib_pci_read_io_u32 (vm, vif->pci_dev_handle, VIRTIO_PCI_HOST_FEATURES,
414 vlib_cli_output (vm, "remote features 0x%lx", data_u32);
415 vlib_pci_read_io_u32 (vm, vif->pci_dev_handle, VIRTIO_PCI_GUEST_FEATURES,
417 vlib_cli_output (vm, "guest features 0x%lx", data_u32);
418 vlib_pci_read_io_u32 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_PFN,
420 vlib_cli_output (vm, "queue address 0x%lx", data_u32);
421 vlib_pci_read_io_u16 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_NUM,
423 vlib_cli_output (vm, "queue size 0x%x", data_u16);
424 vlib_pci_read_io_u16 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_SEL,
426 vlib_cli_output (vm, "queue select 0x%x", data_u16);
427 vlib_pci_read_io_u16 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_NOTIFY,
429 vlib_cli_output (vm, "queue notify 0x%x", data_u16);
430 vlib_pci_read_io_u8 (vm, vif->pci_dev_handle, VIRTIO_PCI_STATUS, &data_u8);
431 vlib_cli_output (vm, "status 0x%x", data_u8);
432 vlib_pci_read_io_u8 (vm, vif->pci_dev_handle, VIRTIO_PCI_ISR, &data_u8);
433 vlib_cli_output (vm, "isr 0x%x", data_u8);
435 if (vif->msix_enabled == VIRTIO_MSIX_ENABLED)
437 vlib_pci_read_io_u16 (vm, vif->pci_dev_handle, VIRTIO_MSI_CONFIG_VECTOR,
439 vlib_cli_output (vm, "config vector 0x%x", data_u16);
441 vlib_pci_write_io_u16 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_SEL,
443 vlib_pci_read_io_u16 (vm, vif->pci_dev_handle, VIRTIO_MSI_QUEUE_VECTOR,
445 vlib_cli_output (vm, "queue vector for queue (0) 0x%x", data_u16);
449 virtio_pci_legacy_read_config (vm, vif, mac, sizeof (mac), 0);
450 vlib_cli_output (vm, "mac %U", format_ethernet_address, mac);
451 virtio_pci_legacy_read_config (vm, vif, &data_u16, sizeof (u16), /* offset to status */
453 vlib_cli_output (vm, "link up/down status 0x%x", data_u16);
454 virtio_pci_legacy_read_config (vm, vif, &data_u16, sizeof (u16),
455 /* offset to max_virtqueue */ 8);
456 vlib_cli_output (vm, "num of virtqueue 0x%x", data_u16);
457 virtio_pci_legacy_read_config (vm, vif, &data_u16, sizeof (u16), /* offset to mtu */
459 vlib_cli_output (vm, "mtu 0x%x", data_u16);
461 u32 i = PCI_CONFIG_SIZE (vif) + 12, a = 4;
464 for (; i < 64; i += 4)
467 vlib_pci_read_io_u32 (vm, vif->pci_dev_handle, i, &data);
468 vlib_cli_output (vm, "0x%lx", data);
472 struct virtio_ctrl_msg
474 struct virtio_net_ctrl_hdr ctrl;
475 virtio_net_ctrl_ack status;
480 virtio_pci_send_ctrl_msg (vlib_main_t * vm, virtio_if_t * vif,
481 struct virtio_ctrl_msg *data, u32 len)
483 virtio_vring_t *vring = vif->cxq_vring;
484 virtio_net_ctrl_ack status = VIRTIO_NET_ERR;
485 struct virtio_ctrl_msg result;
488 u16 used, next, avail;
489 u16 sz = vring->size;
492 used = vring->desc_in_use;
493 next = vring->desc_next;
494 avail = vring->avail->idx;
495 struct vring_desc *d = &vring->desc[next];
497 if (vlib_buffer_alloc (vm, &buffer_index, 1))
498 b = vlib_get_buffer (vm, buffer_index);
500 return VIRTIO_NET_ERR;
502 * current_data may not be initialized with 0 and may contain
506 clib_memcpy (vlib_buffer_get_current (b), data,
507 sizeof (struct virtio_ctrl_msg));
508 d->flags = VRING_DESC_F_NEXT;
509 d->addr = vlib_buffer_get_current_pa (vm, b);
510 d->len = sizeof (struct virtio_net_ctrl_hdr);
511 vring->avail->ring[avail & mask] = next;
513 next = (next + 1) & mask;
517 d = &vring->desc[next];
518 d->flags = VRING_DESC_F_NEXT;
519 d->addr = vlib_buffer_get_current_pa (vm, b) +
520 STRUCT_OFFSET_OF (struct virtio_ctrl_msg, data);
522 next = (next + 1) & mask;
526 d = &vring->desc[next];
527 d->flags = VRING_DESC_F_WRITE;
528 d->addr = vlib_buffer_get_current_pa (vm, b) +
529 STRUCT_OFFSET_OF (struct virtio_ctrl_msg, status);
530 d->len = sizeof (data->status);
531 next = (next + 1) & mask;
534 CLIB_MEMORY_STORE_BARRIER ();
535 vring->avail->idx = avail;
536 vring->desc_next = next;
537 vring->desc_in_use = used;
539 if ((vring->used->flags & VIRTIO_RING_FLAG_MASK_INT) == 0)
541 virtio_kick (vm, vring, vif);
544 u16 last = vring->last_used_idx, n_left = 0;
545 n_left = vring->used->idx - last;
549 struct vring_used_elem *e = &vring->used->ring[last & mask];
552 d = &vring->desc[slot];
553 while (d->flags & VRING_DESC_F_NEXT)
557 d = &vring->desc[slot];
563 vring->desc_in_use = used;
564 vring->last_used_idx = last;
566 CLIB_MEMORY_BARRIER ();
567 clib_memcpy (&result, vlib_buffer_get_current (b),
568 sizeof (struct virtio_ctrl_msg));
569 virtio_log_debug (vif, "ctrl-queue: status %u", result.status);
570 status = result.status;
571 vlib_buffer_free (vm, &buffer_index, 1);
576 virtio_pci_disable_offload (vlib_main_t * vm, virtio_if_t * vif)
578 struct virtio_ctrl_msg offload_hdr;
579 virtio_net_ctrl_ack status = VIRTIO_NET_ERR;
581 offload_hdr.ctrl.class = VIRTIO_NET_CTRL_GUEST_OFFLOADS;
582 offload_hdr.ctrl.cmd = VIRTIO_NET_CTRL_GUEST_OFFLOADS_SET;
583 offload_hdr.status = VIRTIO_NET_ERR;
585 clib_memcpy (offload_hdr.data, &offloads, sizeof (offloads));
588 virtio_pci_send_ctrl_msg (vm, vif, &offload_hdr, sizeof (offloads));
589 virtio_log_debug (vif, "disable offloads");
590 vif->remote_features = virtio_pci_legacy_get_host_features (vm, vif);
591 virtio_pci_legacy_get_guest_features (vm, vif);
596 virtio_pci_enable_checksum_offload (vlib_main_t * vm, virtio_if_t * vif)
598 struct virtio_ctrl_msg csum_offload_hdr;
599 virtio_net_ctrl_ack status = VIRTIO_NET_ERR;
601 csum_offload_hdr.ctrl.class = VIRTIO_NET_CTRL_GUEST_OFFLOADS;
602 csum_offload_hdr.ctrl.cmd = VIRTIO_NET_CTRL_GUEST_OFFLOADS_SET;
603 csum_offload_hdr.status = VIRTIO_NET_ERR;
605 offloads |= VIRTIO_FEATURE (VIRTIO_NET_F_GUEST_CSUM);
606 clib_memcpy (csum_offload_hdr.data, &offloads, sizeof (offloads));
609 virtio_pci_send_ctrl_msg (vm, vif, &csum_offload_hdr, sizeof (offloads));
610 virtio_log_debug (vif, "enable checksum offload");
611 vif->remote_features = virtio_pci_legacy_get_host_features (vm, vif);
612 virtio_pci_legacy_get_guest_features (vm, vif);
617 virtio_pci_enable_gso (vlib_main_t * vm, virtio_if_t * vif)
619 struct virtio_ctrl_msg gso_hdr;
620 virtio_net_ctrl_ack status = VIRTIO_NET_ERR;
622 gso_hdr.ctrl.class = VIRTIO_NET_CTRL_GUEST_OFFLOADS;
623 gso_hdr.ctrl.cmd = VIRTIO_NET_CTRL_GUEST_OFFLOADS_SET;
624 gso_hdr.status = VIRTIO_NET_ERR;
625 u64 offloads = VIRTIO_FEATURE (VIRTIO_NET_F_GUEST_CSUM)
626 | VIRTIO_FEATURE (VIRTIO_NET_F_GUEST_TSO4)
627 | VIRTIO_FEATURE (VIRTIO_NET_F_GUEST_TSO6);
628 clib_memcpy (gso_hdr.data, &offloads, sizeof (offloads));
630 status = virtio_pci_send_ctrl_msg (vm, vif, &gso_hdr, sizeof (offloads));
631 virtio_log_debug (vif, "enable gso");
632 vif->remote_features = virtio_pci_legacy_get_host_features (vm, vif);
633 virtio_pci_legacy_get_guest_features (vm, vif);
638 virtio_pci_offloads (vlib_main_t * vm, virtio_if_t * vif, int gso_enabled,
639 int csum_offload_enabled)
641 vnet_main_t *vnm = vnet_get_main ();
642 vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, vif->hw_if_index);
644 if ((vif->features & VIRTIO_FEATURE (VIRTIO_NET_F_CTRL_VQ)) &&
645 (vif->features & VIRTIO_FEATURE (VIRTIO_NET_F_CTRL_GUEST_OFFLOADS)))
648 && (vif->features & (VIRTIO_FEATURE (VIRTIO_NET_F_HOST_TSO4) |
649 VIRTIO_FEATURE (VIRTIO_NET_F_HOST_TSO6))))
651 if (virtio_pci_enable_gso (vm, vif))
653 virtio_log_warning (vif, "gso is not enabled");
657 vif->gso_enabled = 1;
658 vif->csum_offload_enabled = 0;
659 hw->flags |= VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO |
660 VNET_HW_INTERFACE_FLAG_SUPPORTS_TX_L4_CKSUM_OFFLOAD;
663 else if (csum_offload_enabled
664 && (vif->features & VIRTIO_FEATURE (VIRTIO_NET_F_CSUM)))
666 if (virtio_pci_enable_checksum_offload (vm, vif))
668 virtio_log_warning (vif, "checksum offload is not enabled");
672 vif->csum_offload_enabled = 1;
673 vif->gso_enabled = 0;
674 hw->flags &= ~VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO;
676 VNET_HW_INTERFACE_FLAG_SUPPORTS_TX_L4_CKSUM_OFFLOAD;
681 if (virtio_pci_disable_offload (vm, vif))
683 virtio_log_warning (vif, "offloads are not disabled");
687 vif->csum_offload_enabled = 0;
688 vif->gso_enabled = 0;
689 hw->flags &= ~(VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO |
690 VNET_HW_INTERFACE_FLAG_SUPPORTS_TX_L4_CKSUM_OFFLOAD);
699 virtio_pci_enable_multiqueue (vlib_main_t * vm, virtio_if_t * vif,
702 struct virtio_ctrl_msg mq_hdr;
703 virtio_net_ctrl_ack status = VIRTIO_NET_ERR;
705 mq_hdr.ctrl.class = VIRTIO_NET_CTRL_MQ;
706 mq_hdr.ctrl.cmd = VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET;
707 mq_hdr.status = VIRTIO_NET_ERR;
708 clib_memcpy (mq_hdr.data, &num_queues, sizeof (num_queues));
710 status = virtio_pci_send_ctrl_msg (vm, vif, &mq_hdr, sizeof (num_queues));
711 virtio_log_debug (vif, "multi-queue enable %u queues", num_queues);
716 virtio_pci_queue_size_valid (u16 qsz)
718 if (qsz < 64 || qsz > 4096)
726 virtio_pci_control_vring_init (vlib_main_t * vm, virtio_if_t * vif,
729 clib_error_t *error = 0;
731 virtio_vring_t *vring;
736 queue_size = virtio_pci_legacy_get_queue_num (vm, vif, queue_num);
737 if (!virtio_pci_queue_size_valid (queue_size))
738 clib_warning ("queue size is not valid");
740 if (!is_pow2 (queue_size))
741 return clib_error_return (0, "ring size must be power of 2");
743 if (queue_size > 32768)
744 return clib_error_return (0, "ring size must be 32768 or lower");
749 vec_validate_aligned (vif->cxq_vring, 0, CLIB_CACHE_LINE_BYTES);
750 vring = vec_elt_at_index (vif->cxq_vring, 0);
751 i = vring_size (queue_size, VIRTIO_PCI_VRING_ALIGN);
752 i = round_pow2 (i, VIRTIO_PCI_VRING_ALIGN);
754 vlib_physmem_alloc_aligned_on_numa (vm, i, VIRTIO_PCI_VRING_ALIGN,
757 return vlib_physmem_last_error (vm);
758 clib_memset (ptr, 0, i);
759 vring_init (&vr, queue_size, ptr, VIRTIO_PCI_VRING_ALIGN);
760 vring->desc = vr.desc;
761 vring->avail = vr.avail;
762 vring->used = vr.used;
763 vring->queue_id = queue_num;
764 vring->avail->flags = VIRTIO_RING_FLAG_MASK_INT;
766 ASSERT (vring->buffers == 0);
768 vring->size = queue_size;
769 virtio_log_debug (vif, "control-queue: number %u, size %u", queue_num,
771 virtio_pci_legacy_setup_queue (vm, vif, queue_num, ptr);
778 virtio_pci_vring_init (vlib_main_t * vm, virtio_if_t * vif, u16 queue_num)
780 clib_error_t *error = 0;
782 virtio_vring_t *vring;
787 queue_size = virtio_pci_legacy_get_queue_num (vm, vif, queue_num);
788 if (!virtio_pci_queue_size_valid (queue_size))
789 clib_warning ("queue size is not valid");
791 if (!is_pow2 (queue_size))
792 return clib_error_return (0, "ring size must be power of 2");
794 if (queue_size > 32768)
795 return clib_error_return (0, "ring size must be 32768 or lower");
802 vec_validate_aligned (vif->txq_vrings, TX_QUEUE_ACCESS (queue_num),
803 CLIB_CACHE_LINE_BYTES);
804 vring = vec_elt_at_index (vif->txq_vrings, TX_QUEUE_ACCESS (queue_num));
805 clib_spinlock_init (&vring->lockp);
809 vec_validate_aligned (vif->rxq_vrings, RX_QUEUE_ACCESS (queue_num),
810 CLIB_CACHE_LINE_BYTES);
811 vring = vec_elt_at_index (vif->rxq_vrings, RX_QUEUE_ACCESS (queue_num));
813 i = vring_size (queue_size, VIRTIO_PCI_VRING_ALIGN);
814 i = round_pow2 (i, VIRTIO_PCI_VRING_ALIGN);
816 vlib_physmem_alloc_aligned_on_numa (vm, i, VIRTIO_PCI_VRING_ALIGN,
819 return vlib_physmem_last_error (vm);
820 clib_memset (ptr, 0, i);
821 vring_init (&vr, queue_size, ptr, VIRTIO_PCI_VRING_ALIGN);
822 vring->desc = vr.desc;
823 vring->avail = vr.avail;
824 vring->used = vr.used;
825 vring->queue_id = queue_num;
826 vring->avail->flags = VIRTIO_RING_FLAG_MASK_INT;
827 vring->flow_table = 0;
829 ASSERT (vring->buffers == 0);
830 vec_validate_aligned (vring->buffers, queue_size, CLIB_CACHE_LINE_BYTES);
833 virtio_log_debug (vif, "tx-queue: number %u, size %u", queue_num,
835 clib_memset_u32 (vring->buffers, ~0, queue_size);
839 virtio_log_debug (vif, "rx-queue: number %u, size %u", queue_num,
842 vring->size = queue_size;
843 if (virtio_pci_legacy_setup_queue (vm, vif, queue_num, ptr))
844 return clib_error_return (0, "error in queue address setup");
851 virtio_negotiate_features (vlib_main_t * vm, virtio_if_t * vif,
855 * if features are not requested
856 * default: all supported features
858 u64 supported_features = VIRTIO_FEATURE (VIRTIO_NET_F_CSUM)
859 | VIRTIO_FEATURE (VIRTIO_NET_F_GUEST_CSUM)
860 | VIRTIO_FEATURE (VIRTIO_NET_F_CTRL_GUEST_OFFLOADS)
861 | VIRTIO_FEATURE (VIRTIO_NET_F_MTU)
862 | VIRTIO_FEATURE (VIRTIO_NET_F_MAC)
863 | VIRTIO_FEATURE (VIRTIO_NET_F_GSO)
864 | VIRTIO_FEATURE (VIRTIO_NET_F_GUEST_TSO4)
865 | VIRTIO_FEATURE (VIRTIO_NET_F_GUEST_TSO6)
866 | VIRTIO_FEATURE (VIRTIO_NET_F_GUEST_UFO)
867 | VIRTIO_FEATURE (VIRTIO_NET_F_HOST_TSO4)
868 | VIRTIO_FEATURE (VIRTIO_NET_F_HOST_TSO6)
869 | VIRTIO_FEATURE (VIRTIO_NET_F_HOST_UFO)
870 | VIRTIO_FEATURE (VIRTIO_NET_F_MRG_RXBUF)
871 | VIRTIO_FEATURE (VIRTIO_NET_F_STATUS)
872 | VIRTIO_FEATURE (VIRTIO_NET_F_CTRL_VQ)
873 | VIRTIO_FEATURE (VIRTIO_NET_F_MQ)
874 | VIRTIO_FEATURE (VIRTIO_F_NOTIFY_ON_EMPTY)
875 | VIRTIO_FEATURE (VIRTIO_F_ANY_LAYOUT)
876 | VIRTIO_FEATURE (VIRTIO_RING_F_INDIRECT_DESC);
878 if (req_features == 0)
880 req_features = supported_features;
883 vif->features = req_features & vif->remote_features & supported_features;
885 if (vif->features & VIRTIO_FEATURE (VIRTIO_NET_F_MTU))
887 virtio_net_config_t config;
888 virtio_pci_legacy_read_config (vm, vif, &config.mtu,
890 STRUCT_OFFSET_OF (virtio_net_config_t,
893 vif->features &= ~VIRTIO_FEATURE (VIRTIO_NET_F_MTU);
897 virtio_pci_legacy_set_guest_features (vm, vif, vif->features);
901 virtio_pci_read_device_feature (vlib_main_t * vm, virtio_if_t * vif)
903 vif->remote_features = virtio_pci_legacy_get_host_features (vm, vif);
907 virtio_pci_reset_device (vlib_main_t * vm, virtio_if_t * vif)
914 status = virtio_pci_legacy_reset (vm, vif);
917 * Set the Acknowledge status bit
919 virtio_pci_legacy_set_status (vm, vif, VIRTIO_CONFIG_STATUS_ACK);
922 * Set the Driver status bit
924 virtio_pci_legacy_set_status (vm, vif, VIRTIO_CONFIG_STATUS_DRIVER);
927 * Read the status and verify it
929 status = virtio_pci_legacy_get_status (vm, vif);
931 ((status & VIRTIO_CONFIG_STATUS_ACK)
932 && (status & VIRTIO_CONFIG_STATUS_DRIVER)))
934 vif->status = status;
940 virtio_pci_read_caps (vlib_main_t * vm, virtio_if_t * vif)
942 clib_error_t *error = 0;
943 struct virtio_pci_cap cap;
944 u8 pos, common_cfg = 0, notify_base = 0, dev_cfg = 0, isr = 0, pci_cfg = 0;
945 vlib_pci_dev_handle_t h = vif->pci_dev_handle;
947 if ((error = vlib_pci_read_config_u8 (vm, h, PCI_CAPABILITY_LIST, &pos)))
949 virtio_log_error (vif, "error in reading capabilty list position");
950 clib_error_return (error, "error in reading capabilty list position");
955 vlib_pci_read_write_config (vm, h, VLIB_READ, pos, &cap,
958 virtio_log_error (vif, "%s [%2x]",
959 "error in reading the capability at", pos);
960 clib_error_return (error,
961 "error in reading the capability at [%2x]", pos);
964 if (cap.cap_vndr == PCI_CAP_ID_MSIX)
966 u16 flags, table_size, table_size_mask = 0x07FF;
969 vlib_pci_read_write_config (vm, h, VLIB_READ, pos + 2, &flags,
971 clib_error_return (error,
972 "error in reading the capability at [%2x]",
975 table_size = flags & table_size_mask;
976 virtio_log_debug (vif, "flags:0x%x %s 0x%x", flags,
977 "msix interrupt vector table-size", table_size);
979 if (flags & PCI_MSIX_ENABLE)
981 virtio_log_debug (vif, "msix interrupt enabled");
982 vif->msix_enabled = VIRTIO_MSIX_ENABLED;
983 vif->msix_table_size = table_size;
987 virtio_log_debug (vif, "msix interrupt disabled");
988 vif->msix_enabled = VIRTIO_MSIX_DISABLED;
989 vif->msix_table_size = 0;
993 if (cap.cap_vndr != PCI_CAP_ID_VNDR)
995 virtio_log_debug (vif, "[%2x] %s %2x ", pos,
996 "skipping non VNDR cap id:", cap.cap_vndr);
1000 virtio_log_debug (vif,
1001 "[%4x] cfg type: %u, bar: %u, offset: %04x, len: %u",
1002 pos, cap.cfg_type, cap.bar, cap.offset, cap.length);
1003 switch (cap.cfg_type)
1005 case VIRTIO_PCI_CAP_COMMON_CFG:
1008 case VIRTIO_PCI_CAP_NOTIFY_CFG:
1011 case VIRTIO_PCI_CAP_DEVICE_CFG:
1014 case VIRTIO_PCI_CAP_ISR_CFG:
1017 case VIRTIO_PCI_CAP_PCI_CFG:
1026 if (common_cfg == 0 || notify_base == 0 || dev_cfg == 0 || isr == 0)
1028 virtio_log_debug (vif, "legacy virtio pci device found");
1033 clib_error_return (error, "modern virtio pci device found");
1035 virtio_log_debug (vif, "transitional virtio pci device found");
1039 static clib_error_t *
1040 virtio_pci_device_init (vlib_main_t * vm, virtio_if_t * vif,
1041 virtio_pci_create_if_args_t * args)
1043 clib_error_t *error = 0;
1044 vlib_thread_main_t *vtm = vlib_get_thread_main ();
1047 if ((error = virtio_pci_read_caps (vm, vif)))
1049 args->rv = VNET_API_ERROR_UNSUPPORTED;
1050 virtio_log_error (vif, "Device is not supported");
1051 clib_error_return (error, "Device is not supported");
1054 if (virtio_pci_reset_device (vm, vif) < 0)
1056 args->rv = VNET_API_ERROR_INIT_FAILED;
1057 virtio_log_error (vif, "Failed to reset the device");
1058 clib_error_return (error, "Failed to reset the device");
1061 * read device features and negotiate (user) requested features
1063 virtio_pci_read_device_feature (vm, vif);
1064 if ((vif->remote_features & VIRTIO_FEATURE (VIRTIO_RING_F_INDIRECT_DESC)) ==
1067 virtio_log_warning (vif, "error encountered: vhost-net backend doesn't "
1068 "support VIRTIO_RING_F_INDIRECT_DESC features");
1070 if ((vif->remote_features & VIRTIO_FEATURE (VIRTIO_NET_F_MRG_RXBUF)) == 0)
1072 virtio_log_warning (vif, "error encountered: vhost-net backend doesn't "
1073 "support VIRTIO_NET_F_MRG_RXBUF features");
1075 virtio_negotiate_features (vm, vif, args->features);
1078 * After FEATURE_OK, driver should not accept new feature bits
1080 virtio_pci_legacy_set_status (vm, vif, VIRTIO_CONFIG_STATUS_FEATURES_OK);
1081 status = virtio_pci_legacy_get_status (vm, vif);
1082 if (!(status & VIRTIO_CONFIG_STATUS_FEATURES_OK))
1084 args->rv = VNET_API_ERROR_UNSUPPORTED;
1085 virtio_log_error (vif,
1086 "error encountered: Device doesn't support requested features");
1087 clib_error_return (error, "Device doesn't support requested features");
1089 vif->status = status;
1092 * get or set the mac address
1094 if (virtio_pci_get_mac (vm, vif))
1096 f64 now = vlib_time_now (vm);
1098 rnd = (u32) (now * 1e6);
1099 rnd = random_u32 (&rnd);
1101 memcpy (vif->mac_addr + 2, &rnd, sizeof (rnd));
1102 vif->mac_addr[0] = 2;
1103 vif->mac_addr[1] = 0xfe;
1104 virtio_pci_set_mac (vm, vif);
1107 virtio_set_net_hdr_size (vif);
1110 * Initialize the virtqueues
1112 if ((error = virtio_pci_get_max_virtqueue_pairs (vm, vif)))
1114 args->rv = VNET_API_ERROR_EXCEEDED_NUMBER_OF_RANGES_CAPACITY;
1118 if (vif->msix_enabled == VIRTIO_MSIX_ENABLED)
1120 if (vif->msix_table_size <= vif->max_queue_pairs)
1122 virtio_log_error (vif,
1123 "error MSIX lines (%u) <= Number of RXQs (%u)",
1124 vif->msix_table_size, vif->max_queue_pairs);
1125 return clib_error_return (error,
1126 "error MSIX lines (%u) <= Number of RXQs (%u)",
1127 vif->msix_table_size,
1128 vif->max_queue_pairs);
1132 for (int i = 0; i < vif->max_queue_pairs; i++)
1134 if ((error = virtio_pci_vring_init (vm, vif, RX_QUEUE (i))))
1136 args->rv = VNET_API_ERROR_INIT_FAILED;
1137 virtio_log_error (vif, "%s (%u) %s", "error in rxq-queue",
1138 RX_QUEUE (i), "initialization");
1139 clib_error_return (error, "%s (%u) %s", "error in rxq-queue",
1140 RX_QUEUE (i), "initialization");
1147 if (i >= vtm->n_vlib_mains)
1150 * There is 1:1 mapping between tx queue and vpp worker thread.
1151 * tx queue 0 is bind with thread index 0, tx queue 1 on thread
1152 * index 1 and so on.
1153 * Multiple worker threads can poll same tx queue when number of
1154 * workers are more than tx queues. In this case, 1:N mapping
1155 * between tx queue and vpp worker thread.
1157 virtio_log_debug (vif, "%s %u, %s", "tx-queue: number",
1159 "no VPP worker thread is available");
1163 if ((error = virtio_pci_vring_init (vm, vif, TX_QUEUE (i))))
1165 args->rv = VNET_API_ERROR_INIT_FAILED;
1166 virtio_log_error (vif, "%s (%u) %s", "error in txq-queue",
1167 TX_QUEUE (i), "initialization");
1168 clib_error_return (error, "%s (%u) %s", "error in txq-queue",
1169 TX_QUEUE (i), "initialization");
1177 if (vif->features & VIRTIO_FEATURE (VIRTIO_NET_F_CTRL_VQ))
1180 virtio_pci_control_vring_init (vm, vif, vif->max_queue_pairs * 2)))
1182 virtio_log_warning (vif, "%s (%u) %s", "error in control-queue",
1183 vif->max_queue_pairs * 2, "initialization");
1184 if (vif->features & VIRTIO_FEATURE (VIRTIO_NET_F_MQ))
1185 vif->features &= ~VIRTIO_FEATURE (VIRTIO_NET_F_MQ);
1190 virtio_log_debug (vif, "control queue is not available");
1191 vif->cxq_vring = NULL;
1195 * set the msix interrupts
1197 if (vif->msix_enabled == VIRTIO_MSIX_ENABLED)
1200 if (virtio_pci_legacy_set_config_irq (vm, vif, 0) ==
1201 VIRTIO_MSI_NO_VECTOR)
1203 virtio_log_warning (vif, "config vector 0 is not set");
1207 virtio_log_debug (vif, "config msix vector is set at 0");
1209 for (i = 0, j = 1; i < vif->max_queue_pairs; i++, j++)
1211 if (virtio_pci_legacy_set_queue_irq (vm, vif, j, RX_QUEUE (i)) ==
1212 VIRTIO_MSI_NO_VECTOR)
1214 virtio_log_warning (vif, "queue (%u) vector is not set at %u",
1219 virtio_log_debug (vif, "%s (%u) %s %u", "queue",
1220 RX_QUEUE (i), "msix vector is set at", j);
1226 * set the driver status OK
1228 virtio_pci_legacy_set_status (vm, vif, VIRTIO_CONFIG_STATUS_DRIVER_OK);
1229 vif->status = virtio_pci_legacy_get_status (vm, vif);
1235 virtio_pci_create_if (vlib_main_t * vm, virtio_pci_create_if_args_t * args)
1237 vnet_main_t *vnm = vnet_get_main ();
1238 virtio_main_t *vim = &virtio_main;
1240 vlib_pci_dev_handle_t h;
1241 clib_error_t *error = 0;
1242 u32 interrupt_count = 0;
1245 pool_foreach (vif, vim->interfaces, ({
1246 if (vif->pci_addr.as_u32 == args->addr)
1248 args->rv = VNET_API_ERROR_ADDRESS_IN_USE;
1250 clib_error_return (error, "PCI address in use");
1251 vlib_log (VLIB_LOG_LEVEL_ERR, vim->log_default, "%U: %s",
1252 format_vlib_pci_addr, &args->addr,
1253 " PCI address in use");
1259 pool_get (vim->interfaces, vif);
1260 vif->dev_instance = vif - vim->interfaces;
1261 vif->per_interface_next_index = ~0;
1262 vif->pci_addr.as_u32 = args->addr;
1265 vlib_pci_device_open (vm, (vlib_pci_addr_t *) & vif->pci_addr,
1266 virtio_pci_device_ids, &h)))
1268 args->rv = VNET_API_ERROR_INVALID_INTERFACE;
1270 clib_error_return (error, "pci-addr %U", format_vlib_pci_addr,
1272 vlib_log (VLIB_LOG_LEVEL_ERR, vim->log_default, "%U: %s",
1273 format_vlib_pci_addr, &vif->pci_addr,
1274 "error encountered on pci device open");
1275 pool_put (vim->interfaces, vif);
1278 vif->pci_dev_handle = h;
1279 vlib_pci_set_private_data (vm, h, vif->dev_instance);
1280 vif->numa_node = vlib_pci_get_numa_node (vm, h);
1281 vif->type = VIRTIO_IF_TYPE_PCI;
1283 if ((error = vlib_pci_bus_master_enable (vm, h)))
1285 virtio_log_error (vif, "error encountered on pci bus master enable");
1289 if ((error = vlib_pci_io_region (vm, h, 0)))
1291 virtio_log_error (vif, "error encountered on pci io region");
1295 interrupt_count = vlib_pci_get_num_msix_interrupts (vm, h);
1296 if (interrupt_count > 1)
1298 if ((error = vlib_pci_register_msix_handler (vm, h, 0, 1,
1299 &virtio_pci_irq_config_handler)))
1301 args->rv = VNET_API_ERROR_INVALID_REGISTRATION;
1302 virtio_log_error (vif,
1303 "error encountered on pci register msix handler 0");
1308 vlib_pci_register_msix_handler (vm, h, 1, (interrupt_count - 1),
1309 &virtio_pci_irq_queue_handler)))
1311 args->rv = VNET_API_ERROR_INVALID_REGISTRATION;
1312 virtio_log_error (vif,
1313 "error encountered on pci register msix handler 1");
1317 if ((error = vlib_pci_enable_msix_irq (vm, h, 0, interrupt_count)))
1319 virtio_log_error (vif, "error encountered on pci enable msix irq");
1322 vif->support_int_mode = 1;
1323 virtio_log_debug (vif, "device supports msix interrupts");
1325 else if (interrupt_count == 1)
1328 * if msix table-size is 1, fall back to intX.
1331 vlib_pci_register_intx_handler (vm, h, &virtio_pci_irq_handler)))
1333 virtio_log_error (vif,
1334 "error encountered on pci register interrupt handler");
1337 vif->support_int_mode = 1;
1338 virtio_log_debug (vif, "pci register interrupt handler");
1343 * WARN: intX is showing some weird behaviour.
1344 * Please don't use interrupt mode with UIO driver.
1346 vif->support_int_mode = 0;
1347 virtio_log_debug (vif, "driver is configured in poll mode only");
1350 if ((error = vlib_pci_intr_enable (vm, h)))
1352 virtio_log_error (vif, "error encountered on pci interrupt enable");
1356 if ((error = virtio_pci_device_init (vm, vif, args)))
1358 virtio_log_error (vif, "error encountered on device init");
1362 /* create interface */
1363 error = ethernet_register_interface (vnm, virtio_device_class.index,
1364 vif->dev_instance, vif->mac_addr,
1366 virtio_pci_flag_change);
1370 args->rv = VNET_API_ERROR_INVALID_REGISTRATION;
1371 virtio_log_error (vif,
1372 "error encountered on ethernet register interface");
1376 vnet_sw_interface_t *sw = vnet_get_hw_sw_interface (vnm, vif->hw_if_index);
1377 vif->sw_if_index = sw->sw_if_index;
1378 args->sw_if_index = sw->sw_if_index;
1380 vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, vif->hw_if_index);
1381 hw->flags |= VNET_HW_INTERFACE_FLAG_SUPPORTS_INT_MODE;
1382 vnet_hw_interface_set_input_node (vnm, vif->hw_if_index,
1383 virtio_input_node.index);
1385 vec_foreach_index (i, vif->rxq_vrings)
1387 vnet_hw_interface_assign_rx_thread (vnm, vif->hw_if_index, i, ~0);
1388 virtio_vring_set_numa_node (vm, vif, RX_QUEUE (i));
1389 /* Set default rx mode to POLLING */
1390 vnet_hw_interface_set_rx_mode (vnm, vif->hw_if_index, i,
1391 VNET_HW_INTERFACE_RX_MODE_POLLING);
1393 if (virtio_pci_is_link_up (vm, vif) & VIRTIO_NET_S_LINK_UP)
1395 vif->flags |= VIRTIO_IF_FLAG_ADMIN_UP;
1396 vnet_hw_interface_set_flags (vnm, vif->hw_if_index,
1397 VNET_HW_INTERFACE_FLAG_LINK_UP);
1400 vnet_hw_interface_set_flags (vnm, vif->hw_if_index, 0);
1402 virtio_pci_offloads (vm, vif, args->gso_enabled,
1403 args->checksum_offload_enabled);
1405 if ((vif->features & VIRTIO_FEATURE (VIRTIO_NET_F_CTRL_VQ)) &&
1406 (vif->features & VIRTIO_FEATURE (VIRTIO_NET_F_MQ)))
1408 if (virtio_pci_enable_multiqueue (vm, vif, vif->max_queue_pairs))
1409 virtio_log_warning (vif, "multiqueue is not set");
1414 virtio_pci_delete_if (vm, vif);
1416 args->rv = VNET_API_ERROR_INVALID_INTERFACE;
1417 args->error = error;
1421 virtio_pci_delete_if (vlib_main_t * vm, virtio_if_t * vif)
1423 vnet_main_t *vnm = vnet_get_main ();
1424 virtio_main_t *vim = &virtio_main;
1427 if (vif->type != VIRTIO_IF_TYPE_PCI)
1428 return VNET_API_ERROR_INVALID_INTERFACE;
1430 vlib_pci_intr_disable (vm, vif->pci_dev_handle);
1432 for (i = 0; i < vif->max_queue_pairs; i++)
1434 virtio_pci_legacy_del_queue (vm, vif, RX_QUEUE (i));
1435 virtio_pci_legacy_del_queue (vm, vif, TX_QUEUE (i));
1438 if (vif->features & VIRTIO_FEATURE (VIRTIO_NET_F_CTRL_VQ))
1439 virtio_pci_legacy_del_queue (vm, vif, vif->max_queue_pairs * 2);
1441 virtio_pci_legacy_reset (vm, vif);
1443 if (vif->hw_if_index)
1445 vnet_hw_interface_set_flags (vnm, vif->hw_if_index, 0);
1446 vec_foreach_index (i, vif->rxq_vrings)
1448 vnet_hw_interface_unassign_rx_thread (vnm, vif->hw_if_index, i);
1450 ethernet_delete_interface (vnm, vif->hw_if_index);
1453 vlib_pci_device_close (vm, vif->pci_dev_handle);
1455 vec_foreach_index (i, vif->rxq_vrings)
1457 virtio_vring_t *vring = vec_elt_at_index (vif->rxq_vrings, i);
1458 if (vring->kick_fd != -1)
1459 close (vring->kick_fd);
1462 virtio_free_rx_buffers (vm, vring);
1464 vec_free (vring->buffers);
1465 vlib_physmem_free (vm, vring->desc);
1468 vec_foreach_index (i, vif->txq_vrings)
1470 virtio_vring_t *vring = vec_elt_at_index (vif->txq_vrings, i);
1471 if (vring->kick_fd != -1)
1472 close (vring->kick_fd);
1475 virtio_free_used_desc (vm, vring);
1477 vec_free (vring->buffers);
1478 clib_spinlock_free (&vring->lockp);
1479 vlib_physmem_free (vm, vring->desc);
1482 if (vif->cxq_vring != NULL)
1484 u16 last = vif->cxq_vring->last_used_idx;
1485 u16 n_left = vif->cxq_vring->used->idx - last;
1492 vif->cxq_vring->last_used_idx = last;
1493 vlib_physmem_free (vm, vif->cxq_vring->desc);
1496 vec_free (vif->rxq_vrings);
1497 vec_free (vif->txq_vrings);
1498 vec_free (vif->cxq_vring);
1500 clib_error_free (vif->error);
1501 memset (vif, 0, sizeof (*vif));
1502 pool_put (vim->interfaces, vif);
1508 virtio_pci_enable_disable_offloads (vlib_main_t * vm, virtio_if_t * vif,
1510 int checksum_offload_enabled,
1511 int offloads_disabled)
1513 if (vif->type != VIRTIO_IF_TYPE_PCI)
1514 return VNET_API_ERROR_INVALID_INTERFACE;
1517 virtio_pci_offloads (vm, vif, 1, 0);
1518 else if (checksum_offload_enabled)
1519 virtio_pci_offloads (vm, vif, 0, 1);
1520 else if (offloads_disabled)
1521 virtio_pci_offloads (vm, vif, 0, 0);
1527 * fd.io coding-style-patch-verification: ON
1530 * eval: (c-set-style "gnu")