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 vnet_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 vnet_hw_interface_set_flags (vnm, vif->hw_if_index,
135 VNET_HW_INTERFACE_FLAG_LINK_UP);
139 vnet_hw_interface_set_flags (vnm, vif->hw_if_index, 0);
144 virtio_pci_irq_handler (vlib_main_t * vm, vlib_pci_dev_handle_t h)
146 virtio_main_t *vim = &virtio_main;
147 uword pd = vlib_pci_get_private_data (vm, h);
148 virtio_if_t *vif = pool_elt_at_index (vim->interfaces, pd);
152 isr = vif->virtio_pci_func->get_isr (vm, vif);
155 * If the lower bit is set: look through the used rings of
156 * all virtqueues for the device, to see if any progress has
157 * been made by the device which requires servicing.
159 if (isr & VIRTIO_PCI_ISR_INTR)
161 for (; line < vif->num_rxqs; line++)
162 virtio_pci_irq_queue_handler (vm, h, (line + 1));
165 if (isr & VIRTIO_PCI_ISR_CONFIG)
166 virtio_pci_irq_config_handler (vm, h, line);
170 device_status (vlib_main_t * vm, virtio_if_t * vif)
177 struct status_struct *status_entry;
178 static struct status_struct status_array[] = {
179 #define _(s,b) { .str = #s, .bit = b, },
180 foreach_virtio_config_status_flags
185 vlib_cli_output (vm, " status 0x%x", vif->status);
187 status_entry = (struct status_struct *) &status_array;
188 while (status_entry->str)
190 if (vif->status & status_entry->bit)
191 vlib_cli_output (vm, " %s (%x)", status_entry->str,
198 virtio_pci_send_ctrl_msg_packed (vlib_main_t * vm, virtio_if_t * vif,
199 virtio_ctrl_msg_t * data, u32 len)
201 vnet_virtio_vring_t *vring = vif->cxq_vring;
202 virtio_net_ctrl_ack_t status = VIRTIO_NET_ERR;
203 virtio_ctrl_msg_t result;
207 u16 sz = vring->queue_size;
208 u16 flags = 0, first_desc_flags = 0;
210 used = vring->desc_in_use;
211 next = vring->desc_next;
212 vnet_virtio_vring_packed_desc_t *d = &vring->packed_desc[next];
214 if (vlib_buffer_alloc (vm, &buffer_index, 1))
215 b = vlib_get_buffer (vm, buffer_index);
217 return VIRTIO_NET_ERR;
219 * current_data may not be initialized with 0 and may contain
223 clib_memcpy (vlib_buffer_get_current (b), data, sizeof (virtio_ctrl_msg_t));
225 first_desc_flags = VRING_DESC_F_NEXT;
226 if (vring->avail_wrap_counter)
228 first_desc_flags |= VRING_DESC_F_AVAIL;
229 first_desc_flags &= ~VRING_DESC_F_USED;
233 first_desc_flags &= ~VRING_DESC_F_AVAIL;
234 first_desc_flags |= VRING_DESC_F_USED;
236 d->addr = vlib_buffer_get_current_pa (vm, b);
237 d->len = sizeof (virtio_net_ctrl_hdr_t);
244 vring->avail_wrap_counter ^= 1;
248 d = &vring->packed_desc[next];
249 flags = VRING_DESC_F_NEXT;
250 if (vring->avail_wrap_counter)
252 flags |= VRING_DESC_F_AVAIL;
253 flags &= ~VRING_DESC_F_USED;
257 flags &= ~VRING_DESC_F_AVAIL;
258 flags |= VRING_DESC_F_USED;
260 d->addr = vlib_buffer_get_current_pa (vm, b) +
261 STRUCT_OFFSET_OF (virtio_ctrl_msg_t, data);
270 vring->avail_wrap_counter ^= 1;
274 d = &vring->packed_desc[next];
275 flags = VRING_DESC_F_WRITE;
276 if (vring->avail_wrap_counter)
278 flags |= VRING_DESC_F_AVAIL;
279 flags &= ~VRING_DESC_F_USED;
283 flags &= ~VRING_DESC_F_AVAIL;
284 flags |= VRING_DESC_F_USED;
286 d->addr = vlib_buffer_get_current_pa (vm, b) +
287 STRUCT_OFFSET_OF (virtio_ctrl_msg_t, status);
288 d->len = sizeof (data->status);
296 vring->avail_wrap_counter ^= 1;
300 CLIB_MEMORY_STORE_BARRIER ();
301 vring->packed_desc[vring->desc_next].flags = first_desc_flags;
302 vring->desc_next = next;
303 vring->desc_in_use = used;
304 CLIB_MEMORY_BARRIER ();
305 if (vring->device_event->flags != VRING_EVENT_F_DISABLE)
307 virtio_kick (vm, vring, vif);
310 u16 last = vring->last_used_idx;
311 d = &vring->packed_desc[last];
316 while ((flags & VRING_DESC_F_AVAIL) != (vring->used_wrap_counter << 7)
317 || (flags & VRING_DESC_F_USED) != (vring->used_wrap_counter << 15));
320 if (last >= vring->queue_size)
322 last = last - vring->queue_size;
323 vring->used_wrap_counter ^= 1;
325 vring->desc_in_use -= 3;
326 vring->last_used_idx = last;
328 CLIB_MEMORY_BARRIER ();
329 clib_memcpy (&result, vlib_buffer_get_current (b),
330 sizeof (virtio_ctrl_msg_t));
331 virtio_log_debug (vif, "ctrl-queue: status %u", result.status);
332 status = result.status;
333 vlib_buffer_free (vm, &buffer_index, 1);
338 virtio_pci_send_ctrl_msg_split (vlib_main_t * vm, virtio_if_t * vif,
339 virtio_ctrl_msg_t * data, u32 len)
341 vnet_virtio_vring_t *vring = vif->cxq_vring;
342 virtio_net_ctrl_ack_t status = VIRTIO_NET_ERR;
343 virtio_ctrl_msg_t result;
346 u16 used, next, avail;
347 u16 sz = vring->queue_size;
350 used = vring->desc_in_use;
351 next = vring->desc_next;
352 avail = vring->avail->idx;
353 vnet_virtio_vring_desc_t *d = &vring->desc[next];
355 if (vlib_buffer_alloc (vm, &buffer_index, 1))
356 b = vlib_get_buffer (vm, buffer_index);
358 return VIRTIO_NET_ERR;
360 * current_data may not be initialized with 0 and may contain
364 clib_memcpy (vlib_buffer_get_current (b), data, sizeof (virtio_ctrl_msg_t));
365 d->flags = VRING_DESC_F_NEXT;
366 d->addr = vlib_buffer_get_current_pa (vm, b);
367 d->len = sizeof (virtio_net_ctrl_hdr_t);
368 vring->avail->ring[avail & mask] = next;
370 next = (next + 1) & mask;
374 d = &vring->desc[next];
375 d->flags = VRING_DESC_F_NEXT;
376 d->addr = vlib_buffer_get_current_pa (vm, b) +
377 STRUCT_OFFSET_OF (virtio_ctrl_msg_t, data);
379 next = (next + 1) & mask;
383 d = &vring->desc[next];
384 d->flags = VRING_DESC_F_WRITE;
385 d->addr = vlib_buffer_get_current_pa (vm, b) +
386 STRUCT_OFFSET_OF (virtio_ctrl_msg_t, status);
387 d->len = sizeof (data->status);
388 next = (next + 1) & mask;
391 CLIB_MEMORY_STORE_BARRIER ();
392 vring->avail->idx = avail;
393 vring->desc_next = next;
394 vring->desc_in_use = used;
396 if ((vring->used->flags & VIRTIO_RING_FLAG_MASK_INT) == 0)
398 virtio_kick (vm, vring, vif);
401 u16 last = vring->last_used_idx, n_left = 0;
402 n_left = vring->used->idx - last;
406 vnet_virtio_vring_used_elem_t *e = &vring->used->ring[last & mask];
409 d = &vring->desc[slot];
410 while (d->flags & VRING_DESC_F_NEXT)
414 d = &vring->desc[slot];
420 vring->desc_in_use = used;
421 vring->last_used_idx = last;
423 CLIB_MEMORY_BARRIER ();
424 clib_memcpy (&result, vlib_buffer_get_current (b),
425 sizeof (virtio_ctrl_msg_t));
426 virtio_log_debug (vif, "ctrl-queue: status %u", result.status);
427 status = result.status;
428 vlib_buffer_free (vm, &buffer_index, 1);
433 virtio_pci_send_ctrl_msg (vlib_main_t * vm, virtio_if_t * vif,
434 virtio_ctrl_msg_t * data, u32 len)
437 return virtio_pci_send_ctrl_msg_packed (vm, vif, data, len);
439 return virtio_pci_send_ctrl_msg_split (vm, vif, data, len);
443 virtio_pci_disable_offload (vlib_main_t * vm, virtio_if_t * vif)
445 virtio_ctrl_msg_t offload_hdr;
446 virtio_net_ctrl_ack_t status = VIRTIO_NET_ERR;
448 offload_hdr.ctrl.class = VIRTIO_NET_CTRL_GUEST_OFFLOADS;
449 offload_hdr.ctrl.cmd = VIRTIO_NET_CTRL_GUEST_OFFLOADS_SET;
450 offload_hdr.status = VIRTIO_NET_ERR;
452 clib_memcpy (offload_hdr.data, &offloads, sizeof (offloads));
455 virtio_pci_send_ctrl_msg (vm, vif, &offload_hdr, sizeof (offloads));
456 virtio_log_debug (vif, "disable offloads");
457 vif->remote_features = vif->virtio_pci_func->get_device_features (vm, vif);
458 vif->virtio_pci_func->get_driver_features (vm, vif);
463 virtio_pci_enable_checksum_offload (vlib_main_t * vm, virtio_if_t * vif)
465 virtio_ctrl_msg_t csum_offload_hdr;
466 virtio_net_ctrl_ack_t status = VIRTIO_NET_ERR;
468 csum_offload_hdr.ctrl.class = VIRTIO_NET_CTRL_GUEST_OFFLOADS;
469 csum_offload_hdr.ctrl.cmd = VIRTIO_NET_CTRL_GUEST_OFFLOADS_SET;
470 csum_offload_hdr.status = VIRTIO_NET_ERR;
472 offloads |= VIRTIO_FEATURE (VIRTIO_NET_F_GUEST_CSUM);
473 clib_memcpy (csum_offload_hdr.data, &offloads, sizeof (offloads));
476 virtio_pci_send_ctrl_msg (vm, vif, &csum_offload_hdr, sizeof (offloads));
477 virtio_log_debug (vif, "enable checksum offload");
478 vif->remote_features = vif->virtio_pci_func->get_device_features (vm, vif);
479 vif->features = vif->virtio_pci_func->get_driver_features (vm, vif);
484 virtio_pci_enable_gso (vlib_main_t * vm, virtio_if_t * vif)
486 virtio_ctrl_msg_t gso_hdr;
487 virtio_net_ctrl_ack_t status = VIRTIO_NET_ERR;
489 gso_hdr.ctrl.class = VIRTIO_NET_CTRL_GUEST_OFFLOADS;
490 gso_hdr.ctrl.cmd = VIRTIO_NET_CTRL_GUEST_OFFLOADS_SET;
491 gso_hdr.status = VIRTIO_NET_ERR;
492 u64 offloads = VIRTIO_FEATURE (VIRTIO_NET_F_GUEST_CSUM)
493 | VIRTIO_FEATURE (VIRTIO_NET_F_GUEST_TSO4)
494 | VIRTIO_FEATURE (VIRTIO_NET_F_GUEST_TSO6);
495 clib_memcpy (gso_hdr.data, &offloads, sizeof (offloads));
497 status = virtio_pci_send_ctrl_msg (vm, vif, &gso_hdr, sizeof (offloads));
498 virtio_log_debug (vif, "enable gso");
499 vif->remote_features = vif->virtio_pci_func->get_device_features (vm, vif);
500 vif->virtio_pci_func->get_driver_features (vm, vif);
505 virtio_pci_offloads (vlib_main_t * vm, virtio_if_t * vif, int gso_enabled,
506 int csum_offload_enabled)
508 vnet_main_t *vnm = vnet_get_main ();
509 vnet_hw_if_caps_change_t cc = {};
511 if ((vif->features & VIRTIO_FEATURE (VIRTIO_NET_F_CTRL_VQ)) &&
512 (vif->features & VIRTIO_FEATURE (VIRTIO_NET_F_CTRL_GUEST_OFFLOADS)))
515 && (vif->features & (VIRTIO_FEATURE (VIRTIO_NET_F_HOST_TSO4) |
516 VIRTIO_FEATURE (VIRTIO_NET_F_HOST_TSO6))))
518 if (virtio_pci_enable_gso (vm, vif))
520 virtio_log_warning (vif, "gso is not enabled");
524 vif->gso_enabled = 1;
525 vif->csum_offload_enabled = 1;
526 cc.val = cc.mask = VNET_HW_IF_CAP_TCP_GSO |
527 VNET_HW_IF_CAP_TX_TCP_CKSUM |
528 VNET_HW_IF_CAP_TX_UDP_CKSUM;
531 else if (csum_offload_enabled
532 && (vif->features & VIRTIO_FEATURE (VIRTIO_NET_F_CSUM)))
534 if (virtio_pci_enable_checksum_offload (vm, vif))
536 virtio_log_warning (vif, "checksum offload is not enabled");
540 vif->csum_offload_enabled = 1;
541 vif->gso_enabled = 0;
543 VNET_HW_IF_CAP_TX_TCP_CKSUM | VNET_HW_IF_CAP_TX_UDP_CKSUM;
544 cc.mask = VNET_HW_IF_CAP_TCP_GSO | VNET_HW_IF_CAP_TX_TCP_CKSUM |
545 VNET_HW_IF_CAP_TX_UDP_CKSUM;
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;
559 cc.mask = VNET_HW_IF_CAP_L4_TX_CKSUM | VNET_HW_IF_CAP_TCP_GSO;
565 vnet_hw_if_change_caps (vnm, vif->hw_if_index, &cc);
571 virtio_pci_enable_multiqueue (vlib_main_t * vm, virtio_if_t * vif,
574 virtio_ctrl_msg_t mq_hdr;
575 virtio_net_ctrl_ack_t status = VIRTIO_NET_ERR;
577 mq_hdr.ctrl.class = VIRTIO_NET_CTRL_MQ;
578 mq_hdr.ctrl.cmd = VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET;
579 mq_hdr.status = VIRTIO_NET_ERR;
580 clib_memcpy (mq_hdr.data, &num_queues, sizeof (num_queues));
582 status = virtio_pci_send_ctrl_msg (vm, vif, &mq_hdr, sizeof (num_queues));
583 virtio_log_debug (vif, "multi-queue enable %u queues", num_queues);
588 virtio_pci_queue_size_valid (u16 qsz)
590 if (qsz < 64 || qsz > 4096)
598 virtio_pci_control_vring_packed_init (vlib_main_t * vm, virtio_if_t * vif,
601 clib_error_t *error = 0;
603 vnet_virtio_vring_t *vring;
607 queue_size = vif->virtio_pci_func->get_queue_size (vm, vif, queue_num);
609 if (queue_size > 32768)
610 return clib_error_return (0, "ring size must be 32768 or lower");
615 vec_validate_aligned (vif->cxq_vring, 0, CLIB_CACHE_LINE_BYTES);
616 vring = vec_elt_at_index (vif->cxq_vring, 0);
618 i = (((queue_size * sizeof (vnet_virtio_vring_packed_desc_t)) +
619 sizeof (vnet_virtio_vring_desc_event_t) + VNET_VIRTIO_PCI_VRING_ALIGN -
621 ~(VNET_VIRTIO_PCI_VRING_ALIGN - 1)) +
622 sizeof (vnet_virtio_vring_desc_event_t);
624 ptr = vlib_physmem_alloc_aligned_on_numa (vm, i, VNET_VIRTIO_PCI_VRING_ALIGN,
627 return vlib_physmem_last_error (vm);
628 clib_memset (ptr, 0, i);
630 vring->packed_desc = ptr;
632 vring->driver_event =
633 ptr + (queue_size * sizeof (vnet_virtio_vring_packed_desc_t));
634 vring->driver_event->off_wrap = 0;
635 vring->driver_event->flags = VRING_EVENT_F_DISABLE;
637 vring->device_event =
638 ptr + (((queue_size * sizeof (vnet_virtio_vring_packed_desc_t)) +
639 sizeof (vnet_virtio_vring_desc_event_t) +
640 VNET_VIRTIO_PCI_VRING_ALIGN - 1) &
641 ~(VNET_VIRTIO_PCI_VRING_ALIGN - 1));
642 vring->device_event->off_wrap = 0;
643 vring->device_event->flags = 0;
645 vring->total_packets = 0;
646 vring->queue_id = queue_num;
647 vring->queue_size = queue_size;
648 vring->avail_wrap_counter = 1;
649 vring->used_wrap_counter = 1;
651 ASSERT (vring->buffers == 0);
653 virtio_log_debug (vif, "control-queue: number %u, size %u", queue_num,
655 vif->virtio_pci_func->setup_queue (vm, vif, queue_num, vring);
656 vring->queue_notify_offset =
657 vif->notify_off_multiplier *
658 vif->virtio_pci_func->get_queue_notify_off (vm, vif, queue_num);
659 virtio_log_debug (vif, "queue-notify-offset: number %u, offset %u",
660 queue_num, vring->queue_notify_offset);
665 virtio_pci_control_vring_split_init (vlib_main_t * vm, virtio_if_t * vif,
668 clib_error_t *error = 0;
670 vnet_virtio_vring_t *vring;
674 queue_size = vif->virtio_pci_func->get_queue_size (vm, vif, queue_num);
675 if (!virtio_pci_queue_size_valid (queue_size))
676 clib_warning ("queue size is not valid");
678 if (!is_pow2 (queue_size))
679 return clib_error_return (0, "ring size must be power of 2");
681 if (queue_size > 32768)
682 return clib_error_return (0, "ring size must be 32768 or lower");
687 vec_validate_aligned (vif->cxq_vring, 0, CLIB_CACHE_LINE_BYTES);
688 vring = vec_elt_at_index (vif->cxq_vring, 0);
689 i = vnet_virtio_vring_size (queue_size, VNET_VIRTIO_PCI_VRING_ALIGN);
690 i = round_pow2 (i, VNET_VIRTIO_PCI_VRING_ALIGN);
691 ptr = vlib_physmem_alloc_aligned_on_numa (vm, i, VNET_VIRTIO_PCI_VRING_ALIGN,
694 return vlib_physmem_last_error (vm);
695 clib_memset (ptr, 0, i);
696 vnet_virtio_vring_init (vring, queue_size, ptr, VNET_VIRTIO_PCI_VRING_ALIGN);
697 vring->queue_id = queue_num;
698 vring->total_packets = 0;
700 ASSERT (vring->buffers == 0);
701 virtio_log_debug (vif, "control-queue: number %u, size %u", queue_num,
703 vif->virtio_pci_func->setup_queue (vm, vif, queue_num, vring);
704 vring->queue_notify_offset =
705 vif->notify_off_multiplier *
706 vif->virtio_pci_func->get_queue_notify_off (vm, vif, queue_num);
707 virtio_log_debug (vif, "queue-notify-offset: number %u, offset %u",
708 queue_num, vring->queue_notify_offset);
714 virtio_pci_control_vring_init (vlib_main_t * vm, virtio_if_t * vif,
718 return virtio_pci_control_vring_packed_init (vm, vif, queue_num);
720 return virtio_pci_control_vring_split_init (vm, vif, queue_num);
724 virtio_pci_vring_split_init (vlib_main_t *vm, virtio_if_t *vif, u16 queue_num,
727 clib_error_t *error = 0;
729 vnet_virtio_vring_t *vring;
733 queue_size = vif->virtio_pci_func->get_queue_size (vm, vif, queue_num);
734 if (!virtio_pci_queue_size_valid (queue_size))
735 clib_warning ("queue size is not valid");
737 if (!is_pow2 (queue_size))
738 return clib_error_return (0, "ring size must be power of 2");
740 if (queue_size > 32768)
741 return clib_error_return (0, "ring size must be 32768 or lower");
750 virtio_log_debug (vif, "tx-queue: number %u, default-size %u",
751 queue_num, queue_size);
752 vif->virtio_pci_func->set_queue_size (vm, vif, queue_num, txq_size);
754 vif->virtio_pci_func->get_queue_size (vm, vif, queue_num);
755 virtio_log_debug (vif, "tx-queue: number %u, new size %u", queue_num,
758 vec_validate_aligned (vif->txq_vrings, TX_QUEUE_ACCESS (queue_num),
759 CLIB_CACHE_LINE_BYTES);
760 vring = vec_elt_at_index (vif->txq_vrings, TX_QUEUE_ACCESS (queue_num));
761 clib_spinlock_init (&vring->lockp);
765 vec_validate_aligned (vif->rxq_vrings, RX_QUEUE_ACCESS (queue_num),
766 CLIB_CACHE_LINE_BYTES);
767 vring = vec_elt_at_index (vif->rxq_vrings, RX_QUEUE_ACCESS (queue_num));
769 i = vnet_virtio_vring_size (queue_size, VNET_VIRTIO_PCI_VRING_ALIGN);
770 i = round_pow2 (i, VNET_VIRTIO_PCI_VRING_ALIGN);
771 ptr = vlib_physmem_alloc_aligned_on_numa (vm, i, VNET_VIRTIO_PCI_VRING_ALIGN,
774 return vlib_physmem_last_error (vm);
775 clib_memset (ptr, 0, i);
776 vnet_virtio_vring_init (vring, queue_size, ptr, VNET_VIRTIO_PCI_VRING_ALIGN);
777 vring->queue_id = queue_num;
778 vring->avail->flags = VIRTIO_RING_FLAG_MASK_INT;
779 vring->flow_table = 0;
780 vring->total_packets = 0;
782 ASSERT (vring->buffers == 0);
783 vec_validate_aligned (vring->buffers, queue_size, CLIB_CACHE_LINE_BYTES);
786 virtio_log_debug (vif, "tx-queue: number %u, size %u", queue_num,
788 clib_memset_u32 (vring->buffers, ~0, queue_size);
792 virtio_log_debug (vif, "rx-queue: number %u, size %u", queue_num,
795 vring->queue_size = queue_size;
796 if (vif->virtio_pci_func->setup_queue (vm, vif, queue_num, vring))
797 return clib_error_return (0, "error in queue address setup");
799 vring->queue_notify_offset =
800 vif->notify_off_multiplier *
801 vif->virtio_pci_func->get_queue_notify_off (vm, vif, queue_num);
802 virtio_log_debug (vif, "queue-notify-offset: number %u, offset %u",
803 queue_num, vring->queue_notify_offset);
808 virtio_pci_vring_packed_init (vlib_main_t * vm, virtio_if_t * vif,
811 clib_error_t *error = 0;
813 vnet_virtio_vring_t *vring;
817 queue_size = vif->virtio_pci_func->get_queue_size (vm, vif, queue_num);
819 if (queue_size > 32768)
820 return clib_error_return (0, "ring size must be 32768 or lower");
827 vec_validate_aligned (vif->txq_vrings, TX_QUEUE_ACCESS (queue_num),
828 CLIB_CACHE_LINE_BYTES);
829 vring = vec_elt_at_index (vif->txq_vrings, TX_QUEUE_ACCESS (queue_num));
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));
839 i = (((queue_size * sizeof (vnet_virtio_vring_packed_desc_t)) +
840 sizeof (vnet_virtio_vring_desc_event_t) + VNET_VIRTIO_PCI_VRING_ALIGN -
842 ~(VNET_VIRTIO_PCI_VRING_ALIGN - 1)) +
843 sizeof (vnet_virtio_vring_desc_event_t);
845 ptr = vlib_physmem_alloc_aligned_on_numa (vm, i, VNET_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 =
854 ptr + (queue_size * sizeof (vnet_virtio_vring_packed_desc_t));
855 vring->driver_event->off_wrap = 0;
856 vring->driver_event->flags = VRING_EVENT_F_DISABLE;
858 vring->device_event =
859 ptr + (((queue_size * sizeof (vnet_virtio_vring_packed_desc_t)) +
860 sizeof (vnet_virtio_vring_desc_event_t) +
861 VNET_VIRTIO_PCI_VRING_ALIGN - 1) &
862 ~(VNET_VIRTIO_PCI_VRING_ALIGN - 1));
863 vring->device_event->off_wrap = 0;
864 vring->device_event->flags = 0;
866 vring->queue_id = queue_num;
868 vring->avail_wrap_counter = 1;
869 vring->used_wrap_counter = 1;
870 vring->total_packets = 0;
872 ASSERT (vring->buffers == 0);
873 vec_validate_aligned (vring->buffers, queue_size, CLIB_CACHE_LINE_BYTES);
876 virtio_log_debug (vif, "tx-queue: number %u, size %u", queue_num,
878 clib_memset_u32 (vring->buffers, ~0, queue_size);
882 virtio_log_debug (vif, "rx-queue: number %u, size %u", queue_num,
885 vring->queue_size = queue_size;
886 if (vif->virtio_pci_func->setup_queue (vm, vif, queue_num, vring))
887 return clib_error_return (0, "error in queue address setup");
889 vring->queue_notify_offset =
890 vif->notify_off_multiplier *
891 vif->virtio_pci_func->get_queue_notify_off (vm, vif, queue_num);
892 virtio_log_debug (vif, "queue-notify-offset: number %u, offset %u",
893 queue_num, vring->queue_notify_offset);
899 virtio_pci_vring_init (vlib_main_t *vm, virtio_if_t *vif, u16 queue_num,
903 return virtio_pci_vring_packed_init (vm, vif, queue_num);
905 return virtio_pci_vring_split_init (vm, vif, queue_num, txq_size);
909 virtio_negotiate_features (vlib_main_t * vm, virtio_if_t * vif,
913 * if features are not requested
914 * default: all supported features
916 u64 supported_features = VIRTIO_FEATURE (VIRTIO_NET_F_CSUM)
917 | VIRTIO_FEATURE (VIRTIO_NET_F_GUEST_CSUM)
918 | VIRTIO_FEATURE (VIRTIO_NET_F_CTRL_GUEST_OFFLOADS)
919 | VIRTIO_FEATURE (VIRTIO_NET_F_MTU)
920 | VIRTIO_FEATURE (VIRTIO_NET_F_MAC)
921 | VIRTIO_FEATURE (VIRTIO_NET_F_GSO)
922 | VIRTIO_FEATURE (VIRTIO_NET_F_GUEST_TSO4)
923 | VIRTIO_FEATURE (VIRTIO_NET_F_GUEST_TSO6)
924 | VIRTIO_FEATURE (VIRTIO_NET_F_GUEST_UFO)
925 | VIRTIO_FEATURE (VIRTIO_NET_F_HOST_TSO4)
926 | VIRTIO_FEATURE (VIRTIO_NET_F_HOST_TSO6)
927 | VIRTIO_FEATURE (VIRTIO_NET_F_HOST_UFO)
928 | VIRTIO_FEATURE (VIRTIO_NET_F_MRG_RXBUF)
929 | VIRTIO_FEATURE (VIRTIO_NET_F_STATUS)
930 | VIRTIO_FEATURE (VIRTIO_NET_F_CTRL_VQ)
931 | VIRTIO_FEATURE (VIRTIO_NET_F_MQ)
932 | VIRTIO_FEATURE (VIRTIO_F_NOTIFY_ON_EMPTY)
933 | VIRTIO_FEATURE (VIRTIO_F_ANY_LAYOUT)
934 | VIRTIO_FEATURE (VIRTIO_RING_F_INDIRECT_DESC);
937 supported_features |= VIRTIO_FEATURE (VIRTIO_F_VERSION_1);
941 supported_features |=
942 (VIRTIO_FEATURE (VIRTIO_F_RING_PACKED) |
943 VIRTIO_FEATURE (VIRTIO_F_IN_ORDER));
946 if (req_features == 0)
948 req_features = supported_features;
951 vif->features = req_features & vif->remote_features & supported_features;
953 if (vif->features & VIRTIO_FEATURE (VIRTIO_NET_F_MTU))
956 mtu = vif->virtio_pci_func->get_mtu (vm, vif);
959 vif->features &= ~VIRTIO_FEATURE (VIRTIO_NET_F_MTU);
962 if ((vif->features & (VIRTIO_FEATURE (VIRTIO_F_RING_PACKED))) == 0)
965 vif->virtio_pci_func->set_driver_features (vm, vif, vif->features);
966 vif->features = vif->virtio_pci_func->get_driver_features (vm, vif);
970 virtio_pci_read_device_feature (vlib_main_t * vm, virtio_if_t * vif)
972 vif->remote_features = vif->virtio_pci_func->get_device_features (vm, vif);
976 virtio_pci_reset_device (vlib_main_t * vm, virtio_if_t * vif)
983 status = vif->virtio_pci_func->device_reset (vm, vif);
986 * Set the Acknowledge status bit
988 vif->virtio_pci_func->set_status (vm, vif, VIRTIO_CONFIG_STATUS_ACK);
991 * Set the Driver status bit
993 vif->virtio_pci_func->set_status (vm, vif, VIRTIO_CONFIG_STATUS_DRIVER);
996 * Read the status and verify it
998 status = vif->virtio_pci_func->get_status (vm, vif);
999 if ((status & VIRTIO_CONFIG_STATUS_ACK)
1000 && (status & VIRTIO_CONFIG_STATUS_DRIVER))
1001 vif->status = status;
1009 virtio_pci_read_caps (vlib_main_t * vm, virtio_if_t * vif, void **bar)
1011 clib_error_t *error = 0;
1012 virtio_pci_cap_t cap;
1013 u8 pos, common_cfg = 0, notify = 0, dev_cfg = 0, isr = 0, pci_cfg = 0;
1014 vlib_pci_dev_handle_t h = vif->pci_dev_handle;
1016 if ((error = vlib_pci_read_config_u8 (vm, h, PCI_CAPABILITY_LIST, &pos)))
1018 virtio_log_error (vif, "error in reading capabilty list position");
1019 return clib_error_return (error,
1020 "error in reading capabilty list position");
1025 vlib_pci_read_write_config (vm, h, VLIB_READ, pos, &cap,
1028 virtio_log_error (vif, "%s [%2x]",
1029 "error in reading the capability at", pos);
1030 return clib_error_return (error,
1031 "error in reading the capability at [%2x]",
1035 if (cap.cap_vndr == PCI_CAP_ID_MSIX)
1037 u16 flags, table_size, table_size_mask = 0x07FF;
1040 vlib_pci_read_write_config (vm, h, VLIB_READ, pos + 2, &flags,
1042 return clib_error_return (error,
1043 "error in reading the capability at [%2x]",
1046 table_size = flags & table_size_mask;
1047 virtio_log_debug (vif, "flags:0x%x %s 0x%x", flags,
1048 "msix interrupt vector table-size", table_size);
1050 if (flags & PCI_MSIX_ENABLE)
1052 virtio_log_debug (vif, "msix interrupt enabled");
1053 vif->msix_enabled = VIRTIO_MSIX_ENABLED;
1054 vif->msix_table_size = table_size;
1058 virtio_log_debug (vif, "msix interrupt disabled");
1059 vif->msix_enabled = VIRTIO_MSIX_DISABLED;
1060 vif->msix_table_size = 0;
1064 if (cap.cap_vndr != PCI_CAP_ID_VNDR)
1066 virtio_log_debug (vif, "[%2x] %s %2x ", pos,
1067 "skipping non VNDR cap id:", cap.cap_vndr);
1071 virtio_log_debug (vif,
1072 "[%4x] cfg type: %u, bar: %u, offset: %04x, len: %u",
1073 pos, cap.cfg_type, cap.bar, cap.offset, cap.length);
1075 if (cap.bar >= 0 && cap.bar <= 5)
1077 vif->bar = bar[cap.bar];
1078 vif->bar_id = cap.bar;
1081 return clib_error_return (error, "invalid bar %u", cap.bar);
1083 switch (cap.cfg_type)
1085 case VIRTIO_PCI_CAP_COMMON_CFG:
1086 vif->common_offset = cap.offset;
1089 case VIRTIO_PCI_CAP_NOTIFY_CFG:
1091 vlib_pci_read_write_config (vm, h, VLIB_READ,
1093 &vif->notify_off_multiplier,
1095 (vif->notify_off_multiplier))))
1097 virtio_log_error (vif, "notify off multiplier is not given");
1101 virtio_log_debug (vif, "notify off multiplier is %u",
1102 vif->notify_off_multiplier);
1103 vif->notify_offset = cap.offset;
1107 case VIRTIO_PCI_CAP_DEVICE_CFG:
1108 vif->device_offset = cap.offset;
1111 case VIRTIO_PCI_CAP_ISR_CFG:
1112 vif->isr_offset = cap.offset;
1115 case VIRTIO_PCI_CAP_PCI_CFG:
1124 if (common_cfg == 0 || notify == 0 || dev_cfg == 0 || isr == 0)
1126 vif->virtio_pci_func = &virtio_pci_legacy_func;
1127 vif->notify_off_multiplier = 0;
1128 virtio_log_debug (vif, "legacy virtio pci device found");
1133 vif->virtio_pci_func = &virtio_pci_modern_func;
1137 virtio_log_debug (vif, "modern virtio pci device found");
1141 virtio_log_debug (vif, "transitional virtio pci device found");
1147 static clib_error_t *
1148 virtio_pci_device_init (vlib_main_t * vm, virtio_if_t * vif,
1149 virtio_pci_create_if_args_t * args, void **bar)
1151 clib_error_t *error = 0;
1154 if ((error = virtio_pci_read_caps (vm, vif, bar)))
1156 args->rv = VNET_API_ERROR_UNSUPPORTED;
1157 virtio_log_error (vif, "Device is not supported");
1158 return clib_error_return (error, "Device is not supported");
1161 if (virtio_pci_reset_device (vm, vif) < 0)
1163 args->rv = VNET_API_ERROR_INIT_FAILED;
1164 virtio_log_error (vif, "Failed to reset the device");
1165 return clib_error_return (error, "Failed to reset the device");
1168 * read device features and negotiate (user) requested features
1170 virtio_pci_read_device_feature (vm, vif);
1171 if ((vif->remote_features & VIRTIO_FEATURE (VIRTIO_RING_F_INDIRECT_DESC)) ==
1174 virtio_log_warning (vif, "error encountered: vhost-net backend doesn't "
1175 "support VIRTIO_RING_F_INDIRECT_DESC features");
1177 if ((vif->remote_features & VIRTIO_FEATURE (VIRTIO_NET_F_MRG_RXBUF)) == 0)
1179 virtio_log_warning (vif, "error encountered: vhost-net backend doesn't "
1180 "support VIRTIO_NET_F_MRG_RXBUF features");
1182 virtio_negotiate_features (vm, vif, args->features);
1185 * After FEATURE_OK, driver should not accept new feature bits
1187 vif->virtio_pci_func->set_status (vm, vif,
1188 VIRTIO_CONFIG_STATUS_FEATURES_OK);
1189 status = vif->virtio_pci_func->get_status (vm, vif);
1190 if (!(status & VIRTIO_CONFIG_STATUS_FEATURES_OK))
1192 args->rv = VNET_API_ERROR_UNSUPPORTED;
1193 virtio_log_error (vif,
1194 "error encountered: Device doesn't support requested features");
1195 return clib_error_return (error,
1196 "Device doesn't support requested features");
1198 vif->status = status;
1201 * get or set the mac address
1203 if (virtio_pci_get_mac (vm, vif))
1205 f64 now = vlib_time_now (vm);
1207 rnd = (u32) (now * 1e6);
1208 rnd = random_u32 (&rnd);
1210 memcpy (vif->mac_addr + 2, &rnd, sizeof (rnd));
1211 vif->mac_addr[0] = 2;
1212 vif->mac_addr[1] = 0xfe;
1213 virtio_pci_set_mac (vm, vif);
1216 virtio_set_net_hdr_size (vif);
1219 * Initialize the virtqueues
1221 if ((error = virtio_pci_get_max_virtqueue_pairs (vm, vif)))
1223 args->rv = VNET_API_ERROR_EXCEEDED_NUMBER_OF_RANGES_CAPACITY;
1227 if (vif->msix_enabled == VIRTIO_MSIX_ENABLED)
1229 if (vif->msix_table_size <= vif->max_queue_pairs)
1231 virtio_log_error (vif,
1232 "error MSIX lines (%u) <= Number of RXQs (%u)",
1233 vif->msix_table_size, vif->max_queue_pairs);
1234 return clib_error_return (error,
1235 "error MSIX lines (%u) <= Number of RXQs (%u)",
1236 vif->msix_table_size,
1237 vif->max_queue_pairs);
1241 for (int i = 0; i < vif->max_queue_pairs; i++)
1243 if ((error = virtio_pci_vring_init (vm, vif, RX_QUEUE (i), 0)))
1245 args->rv = VNET_API_ERROR_INIT_FAILED;
1246 virtio_log_error (vif, "%s (%u) %s", "error in rxq-queue",
1247 RX_QUEUE (i), "initialization");
1249 clib_error_return (error, "%s (%u) %s", "error in rxq-queue",
1250 RX_QUEUE (i), "initialization");
1258 if ((error = virtio_pci_vring_init (vm, vif, TX_QUEUE (i),
1259 args->tx_queue_size)))
1261 args->rv = VNET_API_ERROR_INIT_FAILED;
1262 virtio_log_error (vif, "%s (%u) %s", "error in txq-queue",
1263 TX_QUEUE (i), "initialization");
1265 clib_error_return (error, "%s (%u) %s", "error in txq-queue",
1266 TX_QUEUE (i), "initialization");
1275 if (vif->features & VIRTIO_FEATURE (VIRTIO_NET_F_CTRL_VQ))
1278 virtio_pci_control_vring_init (vm, vif, vif->max_queue_pairs * 2)))
1280 virtio_log_warning (vif, "%s (%u) %s", "error in control-queue",
1281 vif->max_queue_pairs * 2, "initialization");
1282 if (vif->features & VIRTIO_FEATURE (VIRTIO_NET_F_MQ))
1283 vif->features &= ~VIRTIO_FEATURE (VIRTIO_NET_F_MQ);
1288 virtio_log_debug (vif, "control queue is not available");
1289 vif->cxq_vring = NULL;
1293 * set the msix interrupts
1295 if (vif->msix_enabled == VIRTIO_MSIX_ENABLED)
1298 if (vif->virtio_pci_func->set_config_irq (vm, vif, 0) ==
1299 VIRTIO_MSI_NO_VECTOR)
1301 virtio_log_warning (vif, "config vector 0 is not set");
1305 virtio_log_debug (vif, "config msix vector is set at 0");
1307 for (i = 0, j = 1; i < vif->max_queue_pairs; i++, j++)
1309 if (vif->virtio_pci_func->set_queue_irq (vm, vif, j,
1311 VIRTIO_MSI_NO_VECTOR)
1313 virtio_log_warning (vif, "queue (%u) vector is not set at %u",
1318 virtio_log_debug (vif, "%s (%u) %s %u", "queue",
1319 RX_QUEUE (i), "msix vector is set at", j);
1325 * set the driver status OK
1327 vif->virtio_pci_func->set_status (vm, vif, VIRTIO_CONFIG_STATUS_DRIVER_OK);
1328 vif->status = vif->virtio_pci_func->get_status (vm, vif);
1334 virtio_pci_create_if (vlib_main_t * vm, virtio_pci_create_if_args_t * args)
1336 vnet_main_t *vnm = vnet_get_main ();
1337 virtio_main_t *vim = &virtio_main;
1339 vlib_pci_dev_handle_t h;
1340 clib_error_t *error = 0;
1341 u32 interrupt_count = 0;
1343 pool_foreach (vif, vim->interfaces) {
1344 if (vif->pci_addr.as_u32 == args->addr)
1346 args->rv = VNET_API_ERROR_ADDRESS_IN_USE;
1348 clib_error_return (error, "PCI address in use");
1349 vlib_log (VLIB_LOG_LEVEL_ERR, vim->log_default, "%U: %s",
1350 format_vlib_pci_addr, &args->addr,
1351 " PCI address in use");
1358 vlib_pci_addr_t pci = { .as_u32 = args->addr };
1359 error = vlib_pci_bind_to_uio (vm, &pci, (char *) "auto",
1360 VIRTIO_BIND_FORCE == args->bind);
1363 args->rv = VNET_API_ERROR_INVALID_INTERFACE;
1365 clib_error_return (error, "%U: %s", format_vlib_pci_addr, &pci,
1366 "error encountered on binding pci device");
1367 vlib_log (VLIB_LOG_LEVEL_ERR, vim->log_default, "%U: %s",
1368 format_vlib_pci_addr, &pci,
1369 "error encountered on binding pci devicee");
1374 pool_get (vim->interfaces, vif);
1375 vif->dev_instance = vif - vim->interfaces;
1376 vif->per_interface_next_index = ~0;
1377 vif->pci_addr.as_u32 = args->addr;
1378 if (args->virtio_flags & VIRTIO_FLAG_PACKED)
1382 vlib_pci_device_open (vm, (vlib_pci_addr_t *) & vif->pci_addr,
1383 virtio_pci_device_ids, &h)))
1385 args->rv = VNET_API_ERROR_INVALID_INTERFACE;
1387 clib_error_return (error, "pci-addr %U", format_vlib_pci_addr,
1389 vlib_log (VLIB_LOG_LEVEL_ERR, vim->log_default, "%U: %s",
1390 format_vlib_pci_addr, &vif->pci_addr,
1391 "error encountered on pci device open");
1392 pool_put (vim->interfaces, vif);
1395 vif->pci_dev_handle = h;
1396 vlib_pci_set_private_data (vm, h, vif->dev_instance);
1397 vif->numa_node = vlib_pci_get_numa_node (vm, h);
1398 vif->type = VIRTIO_IF_TYPE_PCI;
1400 if ((error = vlib_pci_bus_master_enable (vm, h)))
1402 virtio_log_error (vif, "error encountered on pci bus master enable");
1407 for (u32 i = 0; i <= 5; i++)
1410 if ((error = vlib_pci_map_region (vm, h, i, &bar[i])))
1412 virtio_log_debug (vif, "no pci map region for bar %u", i);
1416 virtio_log_debug (vif, "pci map region for bar %u at %p", i,
1421 if ((error = vlib_pci_io_region (vm, h, 0)))
1423 virtio_log_error (vif, "error encountered on pci io region");
1427 interrupt_count = vlib_pci_get_num_msix_interrupts (vm, h);
1428 if (interrupt_count > 1)
1430 if ((error = vlib_pci_register_msix_handler (vm, h, 0, 1,
1431 &virtio_pci_irq_config_handler)))
1433 args->rv = VNET_API_ERROR_INVALID_REGISTRATION;
1434 virtio_log_error (vif,
1435 "error encountered on pci register msix handler 0");
1440 vlib_pci_register_msix_handler (vm, h, 1, (interrupt_count - 1),
1441 &virtio_pci_irq_queue_handler)))
1443 args->rv = VNET_API_ERROR_INVALID_REGISTRATION;
1444 virtio_log_error (vif,
1445 "error encountered on pci register msix handler 1");
1449 if ((error = vlib_pci_enable_msix_irq (vm, h, 0, interrupt_count)))
1451 virtio_log_error (vif, "error encountered on pci enable msix irq");
1454 vif->support_int_mode = 1;
1455 virtio_log_debug (vif, "device supports msix interrupts");
1460 * WARN: performance will be sub-optimal.
1461 * Fall back to intX, if msix table-size is 1 or
1462 * if UIO driver is being used.
1465 vlib_pci_register_intx_handler (vm, h, &virtio_pci_irq_handler)))
1467 virtio_log_error (vif,
1468 "error encountered on pci register interrupt handler");
1471 vif->support_int_mode = 1;
1472 virtio_log_debug (vif, "pci register interrupt handler");
1475 if ((error = vlib_pci_intr_enable (vm, h)))
1477 virtio_log_error (vif, "error encountered on pci interrupt enable");
1481 if ((error = virtio_pci_device_init (vm, vif, args, bar)))
1483 virtio_log_error (vif, "error encountered on device init");
1487 /* create interface */
1488 vnet_eth_interface_registration_t eir = {};
1489 eir.dev_class_index = virtio_device_class.index;
1490 eir.dev_instance = vif->dev_instance;
1491 eir.address = vif->mac_addr;
1492 eir.cb.flag_change = virtio_pci_flag_change;
1493 vif->hw_if_index = vnet_eth_register_interface (vnm, &eir);
1495 vnet_sw_interface_t *sw = vnet_get_hw_sw_interface (vnm, vif->hw_if_index);
1496 vif->sw_if_index = sw->sw_if_index;
1497 args->sw_if_index = sw->sw_if_index;
1499 vnet_hw_if_set_caps (vnm, vif->hw_if_index, VNET_HW_IF_CAP_INT_MODE);
1501 if (args->virtio_flags & VIRTIO_FLAG_BUFFERING)
1503 error = virtio_set_packet_buffering (vif, args->buffering_size);
1506 args->rv = VNET_API_ERROR_INIT_FAILED;
1507 virtio_log_error (vif,
1508 "error encountered during packet buffering init");
1512 * packet buffering flag needs to be set 1 before calling the
1513 * virtio_pre_input_node_enable but after the successful initialization
1514 * of buffering queues above.
1515 * Packet buffering flag set to 0 if there will be any error during
1516 * buffering initialization.
1518 vif->packet_buffering = 1;
1519 virtio_pre_input_node_enable (vm, vif);
1522 virtio_vring_set_rx_queues (vm, vif);
1523 virtio_vring_set_tx_queues (vm, vif);
1525 if (virtio_pci_is_link_up (vm, vif) & VIRTIO_NET_S_LINK_UP)
1527 vnet_hw_interface_set_flags (vnm, vif->hw_if_index,
1528 VNET_HW_INTERFACE_FLAG_LINK_UP);
1531 vnet_hw_interface_set_flags (vnm, vif->hw_if_index, 0);
1533 virtio_pci_offloads (vm, vif, args->gso_enabled,
1534 args->checksum_offload_enabled);
1536 if ((vif->features & VIRTIO_FEATURE (VIRTIO_NET_F_CTRL_VQ)) &&
1537 (vif->features & VIRTIO_FEATURE (VIRTIO_NET_F_MQ)))
1539 if (virtio_pci_enable_multiqueue (vm, vif, vif->max_queue_pairs))
1540 virtio_log_warning (vif, "multiqueue is not set");
1545 virtio_pci_delete_if (vm, vif);
1547 args->rv = VNET_API_ERROR_INVALID_INTERFACE;
1548 args->error = error;
1552 virtio_pci_delete_if (vlib_main_t * vm, virtio_if_t * vif)
1554 vnet_main_t *vnm = vnet_get_main ();
1555 virtio_main_t *vim = &virtio_main;
1558 if (vif->type != VIRTIO_IF_TYPE_PCI)
1559 return VNET_API_ERROR_INVALID_INTERFACE;
1561 vlib_pci_intr_disable (vm, vif->pci_dev_handle);
1563 if (vif->virtio_pci_func)
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 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 vnet_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 if (vif->packet_buffering)
1597 virtio_pre_input_node_disable (vm, vif);
1599 vec_foreach_index (i, vif->txq_vrings)
1601 vnet_virtio_vring_t *vring = vec_elt_at_index (vif->txq_vrings, i);
1604 virtio_free_buffers (vm, vring);
1606 vec_free (vring->buffers);
1607 gro_flow_table_free (vring->flow_table);
1608 virtio_vring_buffering_free (vm, vring->buffering);
1609 clib_spinlock_free (&vring->lockp);
1610 vlib_physmem_free (vm, vring->desc);
1613 if (vif->cxq_vring != NULL)
1615 u16 last = vif->cxq_vring->last_used_idx;
1616 u16 n_left = vif->cxq_vring->used->idx - last;
1623 vif->cxq_vring->last_used_idx = last;
1624 vlib_physmem_free (vm, vif->cxq_vring->desc);
1627 vec_free (vif->rxq_vrings);
1628 vec_free (vif->txq_vrings);
1629 vec_free (vif->cxq_vring);
1631 clib_error_free (vif->error);
1632 memset (vif, 0, sizeof (*vif));
1633 pool_put (vim->interfaces, vif);
1639 virtio_pci_enable_disable_offloads (vlib_main_t * vm, virtio_if_t * vif,
1641 int checksum_offload_enabled,
1642 int offloads_disabled)
1644 if (vif->type != VIRTIO_IF_TYPE_PCI)
1645 return VNET_API_ERROR_INVALID_INTERFACE;
1648 virtio_pci_offloads (vm, vif, 1, 0);
1649 else if (checksum_offload_enabled)
1650 virtio_pci_offloads (vm, vif, 0, 1);
1651 else if (offloads_disabled)
1652 virtio_pci_offloads (vm, vif, 0, 0);
1658 * fd.io coding-style-patch-verification: ON
1661 * eval: (c-set-style "gnu")