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 static u32 msix_enabled = 0;
41 #define PCI_CONFIG_SIZE ((msix_enabled == VIRTIO_MSIX_ENABLED) ? \
44 static pci_device_id_t virtio_pci_device_ids[] = {
46 .vendor_id = PCI_VENDOR_ID_VIRTIO,
47 .device_id = PCI_DEVICE_ID_VIRTIO_NIC},
49 .vendor_id = PCI_VENDOR_ID_VIRTIO,
50 .device_id = PCI_DEVICE_ID_VIRTIO_NIC_MODERN},
55 virtio_pci_legacy_read_config (vlib_main_t * vm, virtio_if_t * vif, void *dst,
59 vlib_pci_dev_handle_t h = vif->pci_dev_handle;
66 vlib_pci_read_io_u32 (vm, h, PCI_CONFIG_SIZE + addr, dst);
71 vlib_pci_read_io_u16 (vm, h, PCI_CONFIG_SIZE + addr, dst);
76 vlib_pci_read_io_u8 (vm, h, PCI_CONFIG_SIZE + addr, dst);
78 dst = (u8 *) dst + size;
85 virtio_pci_legacy_write_config (vlib_main_t * vm, virtio_if_t * vif,
86 void *src, int len, u32 addr)
89 vlib_pci_dev_handle_t h = vif->pci_dev_handle;
96 vlib_pci_write_io_u32 (vm, h, PCI_CONFIG_SIZE + addr, src);
101 vlib_pci_write_io_u16 (vm, h, PCI_CONFIG_SIZE + addr, src);
106 vlib_pci_write_io_u8 (vm, h, PCI_CONFIG_SIZE + addr, src);
108 src = (u8 *) src + size;
115 virtio_pci_legacy_get_features (vlib_main_t * vm, virtio_if_t * vif)
118 vlib_pci_read_io_u32 (vm, vif->pci_dev_handle, VIRTIO_PCI_HOST_FEATURES,
124 virtio_pci_legacy_set_features (vlib_main_t * vm, virtio_if_t * vif,
127 if ((features >> 32) != 0)
129 clib_warning ("only 32 bit features are allowed for legacy virtio!");
131 u32 feature = 0, guest_features = (u32) features;
132 vlib_pci_write_io_u32 (vm, vif->pci_dev_handle, VIRTIO_PCI_GUEST_FEATURES,
134 vlib_pci_read_io_u32 (vm, vif->pci_dev_handle, VIRTIO_PCI_GUEST_FEATURES,
140 virtio_pci_legacy_get_status (vlib_main_t * vm, virtio_if_t * vif)
143 vlib_pci_read_io_u8 (vm, vif->pci_dev_handle, VIRTIO_PCI_STATUS, &status);
148 virtio_pci_legacy_set_status (vlib_main_t * vm, virtio_if_t * vif, u8 status)
150 if (status != VIRTIO_CONFIG_STATUS_RESET)
151 status |= virtio_pci_legacy_get_status (vm, vif);
152 vlib_pci_write_io_u8 (vm, vif->pci_dev_handle, VIRTIO_PCI_STATUS, &status);
156 virtio_pci_legacy_reset (vlib_main_t * vm, virtio_if_t * vif)
158 virtio_pci_legacy_set_status (vm, vif, VIRTIO_CONFIG_STATUS_RESET);
159 return virtio_pci_legacy_get_status (vm, vif);
163 virtio_pci_legacy_get_isr (vlib_main_t * vm, virtio_if_t * vif)
166 vlib_pci_read_io_u8 (vm, vif->pci_dev_handle, VIRTIO_PCI_ISR, &isr);
171 virtio_pci_legacy_get_queue_num (vlib_main_t * vm, virtio_if_t * vif,
175 vlib_pci_write_io_u16 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_SEL,
177 vlib_pci_read_io_u16 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_NUM,
184 virtio_pci_legacy_setup_queue (vlib_main_t * vm, virtio_if_t * vif,
185 u16 queue_id, void *p)
187 u64 addr = vlib_physmem_get_pa (vm, p) >> VIRTIO_PCI_QUEUE_ADDR_SHIFT;
188 vlib_pci_write_io_u16 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_SEL,
190 vlib_pci_write_io_u32 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_PFN,
195 virtio_pci_legacy_del_queue (vlib_main_t * vm, virtio_if_t * vif,
199 vlib_pci_write_io_u16 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_SEL,
201 vlib_pci_write_io_u32 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_PFN, &src);
205 virtio_pci_legacy_notify_queue (vlib_main_t * vm, virtio_if_t * vif,
208 vlib_pci_write_io_u16 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_NOTIFY,
212 /* Enable one vector (0) for Link State Intrerrupt */
214 virtio_pci_legacy_set_config_irq (vlib_main_t * vm, virtio_if_t * vif,
217 vlib_pci_write_io_u16 (vm, vif->pci_dev_handle, VIRTIO_MSI_CONFIG_VECTOR,
219 vlib_pci_read_io_u16 (vm, vif->pci_dev_handle, VIRTIO_MSI_CONFIG_VECTOR,
225 virtio_pci_legacy_set_queue_irq (vlib_main_t * vm, virtio_if_t * vif, u16 vec,
228 vlib_pci_write_io_u16 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_SEL,
230 vlib_pci_write_io_u16 (vm, vif->pci_dev_handle, VIRTIO_MSI_QUEUE_VECTOR,
232 vlib_pci_read_io_u16 (vm, vif->pci_dev_handle, VIRTIO_MSI_QUEUE_VECTOR,
238 virtio_pci_flag_change (vnet_main_t * vnm, vnet_hw_interface_t * hw,
244 static clib_error_t *
245 virtio_pci_get_max_virtqueue_pairs (vlib_main_t * vm, virtio_if_t * vif)
247 virtio_net_config_t config;
248 clib_error_t *error = 0;
249 u16 max_queue_pairs = 1;
251 if (vif->features & VIRTIO_FEATURE (VIRTIO_NET_F_MQ))
253 virtio_pci_legacy_read_config (vm, vif, &config.max_virtqueue_pairs,
254 sizeof (config.max_virtqueue_pairs), 8);
255 max_queue_pairs = config.max_virtqueue_pairs;
258 if (max_queue_pairs < 1 || max_queue_pairs > 0x8000)
259 clib_error_return (error, "max queue pair is %x", max_queue_pairs);
261 vif->max_queue_pairs = max_queue_pairs;
266 virtio_pci_set_mac (vlib_main_t * vm, virtio_if_t * vif)
268 virtio_pci_legacy_write_config (vm, vif, vif->mac_addr,
269 sizeof (vif->mac_addr), 0);
273 virtio_pci_get_mac (vlib_main_t * vm, virtio_if_t * vif)
275 if (vif->remote_features & VIRTIO_FEATURE (VIRTIO_NET_F_MAC))
277 virtio_pci_legacy_read_config (vm, vif, vif->mac_addr,
278 sizeof (vif->mac_addr), 0);
285 virtio_pci_is_link_up (vlib_main_t * vm, virtio_if_t * vif)
288 * Minimal driver: assumes link is up
291 if (vif->remote_features & VIRTIO_FEATURE (VIRTIO_NET_F_STATUS))
292 virtio_pci_legacy_read_config (vm, vif, &status, sizeof (status), /* mac */
298 virtio_pci_irq_0_handler (vlib_main_t * vm, vlib_pci_dev_handle_t h, u16 line)
300 vnet_main_t *vnm = vnet_get_main ();
301 virtio_main_t *vim = &virtio_main;
302 uword pd = vlib_pci_get_private_data (vm, h);
303 virtio_if_t *vif = pool_elt_at_index (vim->interfaces, pd);
306 vnet_device_input_set_interrupt_pending (vnm, vif->hw_if_index, qid);
310 virtio_pci_irq_1_handler (vlib_main_t * vm, vlib_pci_dev_handle_t h, u16 line)
312 vnet_main_t *vnm = vnet_get_main ();
313 virtio_main_t *vim = &virtio_main;
314 uword pd = vlib_pci_get_private_data (vm, h);
315 virtio_if_t *vif = pool_elt_at_index (vim->interfaces, pd);
317 if (virtio_pci_is_link_up (vm, vif) & VIRTIO_NET_S_LINK_UP)
319 vif->flags |= VIRTIO_IF_FLAG_ADMIN_UP;
320 vnet_hw_interface_set_flags (vnm, vif->hw_if_index,
321 VNET_HW_INTERFACE_FLAG_LINK_UP);
325 vif->flags &= ~VIRTIO_IF_FLAG_ADMIN_UP;
326 vnet_hw_interface_set_flags (vnm, vif->hw_if_index, 0);
331 virtio_pci_irq_handler (vlib_main_t * vm, vlib_pci_dev_handle_t h)
333 virtio_main_t *vim = &virtio_main;
334 uword pd = vlib_pci_get_private_data (vm, h);
335 virtio_if_t *vif = pool_elt_at_index (vim->interfaces, pd);
339 isr = virtio_pci_legacy_get_isr (vm, vif);
342 * If the lower bit is set: look through the used rings of
343 * all virtqueues for the device, to see if any progress has
344 * been made by the device which requires servicing.
346 if (isr & VIRTIO_PCI_ISR_INTR)
347 virtio_pci_irq_0_handler (vm, h, line);
349 if (isr & VIRTIO_PCI_ISR_CONFIG)
350 virtio_pci_irq_1_handler (vm, h, line);
354 device_status (vlib_main_t * vm, virtio_if_t * vif)
361 struct status_struct *status_entry;
362 static struct status_struct status_array[] = {
363 #define _(s,b) { .str = #s, .bit = b, },
364 foreach_virtio_config_status_flags
369 vlib_cli_output (vm, " status 0x%x", vif->status);
371 status_entry = (struct status_struct *) &status_array;
372 while (status_entry->str)
374 if (vif->status & status_entry->bit)
375 vlib_cli_output (vm, " %s (%x)", status_entry->str,
382 debug_device_config_space (vlib_main_t * vm, virtio_if_t * vif)
387 vlib_pci_read_io_u32 (vm, vif->pci_dev_handle, VIRTIO_PCI_HOST_FEATURES,
389 vlib_cli_output (vm, "remote features 0x%lx", data_u32);
390 vlib_pci_read_io_u32 (vm, vif->pci_dev_handle, VIRTIO_PCI_GUEST_FEATURES,
392 vlib_cli_output (vm, "guest features 0x%lx", data_u32);
393 vlib_pci_read_io_u32 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_PFN,
395 vlib_cli_output (vm, "queue address 0x%lx", data_u32);
396 vlib_pci_read_io_u16 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_NUM,
398 vlib_cli_output (vm, "queue size 0x%x", data_u16);
399 vlib_pci_read_io_u16 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_SEL,
401 vlib_cli_output (vm, "queue select 0x%x", data_u16);
402 vlib_pci_read_io_u16 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_NOTIFY,
404 vlib_cli_output (vm, "queue notify 0x%x", data_u16);
405 vlib_pci_read_io_u8 (vm, vif->pci_dev_handle, VIRTIO_PCI_STATUS, &data_u8);
406 vlib_cli_output (vm, "status 0x%x", data_u8);
407 vlib_pci_read_io_u8 (vm, vif->pci_dev_handle, VIRTIO_PCI_ISR, &data_u8);
408 vlib_cli_output (vm, "isr 0x%x", data_u8);
411 virtio_pci_legacy_read_config (vm, vif, mac, sizeof (mac), 0);
412 vlib_cli_output (vm, "mac %U", format_ethernet_address, mac);
413 virtio_pci_legacy_read_config (vm, vif, &data_u16, sizeof (u16), /* offset to status */
415 vlib_cli_output (vm, "link up/down status 0x%x", data_u16);
416 virtio_pci_legacy_read_config (vm, vif, &data_u16, sizeof (u16),
417 /* offset to max_virtqueue */ 8);
418 vlib_cli_output (vm, "num of virtqueue 0x%x", data_u16);
419 virtio_pci_legacy_read_config (vm, vif, &data_u16, sizeof (u16), /* offset to mtu */
421 vlib_cli_output (vm, "mtu 0x%x", data_u16);
423 u32 i = PCI_CONFIG_SIZE + 12, a = 4;
426 for (; i < 64; i += 4)
429 vlib_pci_read_io_u32 (vm, vif->pci_dev_handle, i, &data);
430 vlib_cli_output (vm, "0x%lx", data);
435 virtio_pci_queue_size_valid (u16 qsz)
437 if (qsz < 64 || qsz > 4096)
445 virtio_pci_vring_init (vlib_main_t * vm, virtio_if_t * vif, u16 idx)
447 clib_error_t *error = 0;
449 virtio_vring_t *vring;
454 queue_size = virtio_pci_legacy_get_queue_num (vm, vif, idx);
455 if (!virtio_pci_queue_size_valid (queue_size))
456 clib_warning ("queue size is not valid");
458 if (!is_pow2 (queue_size))
459 return clib_error_return (0, "ring size must be power of 2");
461 if (queue_size > 32768)
462 return clib_error_return (0, "ring size must be 32768 or lower");
467 vec_validate_aligned (vif->vrings, idx, CLIB_CACHE_LINE_BYTES);
468 vring = vec_elt_at_index (vif->vrings, idx);
470 i = vring_size (queue_size, VIRTIO_PCI_VRING_ALIGN);
471 i = round_pow2 (i, VIRTIO_PCI_VRING_ALIGN);
472 ptr = vlib_physmem_alloc_aligned (vm, i, VIRTIO_PCI_VRING_ALIGN);
474 vring_init (&vr, queue_size, ptr, VIRTIO_PCI_VRING_ALIGN);
475 vring->desc = vr.desc;
476 vring->avail = vr.avail;
477 vring->used = vr.used;
478 vring->queue_id = idx;
479 vring->avail->flags = VIRTIO_RING_FLAG_MASK_INT;
481 ASSERT (vring->buffers == 0);
482 vec_validate_aligned (vring->buffers, queue_size, CLIB_CACHE_LINE_BYTES);
483 ASSERT (vring->indirect_buffers == 0);
484 vec_validate_aligned (vring->indirect_buffers, queue_size,
485 CLIB_CACHE_LINE_BYTES);
491 if (n_alloc < queue_size)
493 vlib_buffer_alloc (vm, vring->indirect_buffers + n_alloc,
494 queue_size - n_alloc);
496 while (n_alloc != queue_size);
497 vif->tx_ring_sz = queue_size;
500 vif->rx_ring_sz = queue_size;
501 vring->size = queue_size;
503 virtio_pci_legacy_setup_queue (vm, vif, idx, ptr);
510 virtio_negotiate_features (vlib_main_t * vm, virtio_if_t * vif,
514 * if features are not requested
515 * default: all supported features
517 u64 supported_features = VIRTIO_FEATURE (VIRTIO_NET_F_MTU)
518 | VIRTIO_FEATURE (VIRTIO_NET_F_MAC)
519 | VIRTIO_FEATURE (VIRTIO_NET_F_MRG_RXBUF)
520 | VIRTIO_FEATURE (VIRTIO_NET_F_STATUS)
521 | VIRTIO_FEATURE (VIRTIO_F_ANY_LAYOUT)
522 | VIRTIO_FEATURE (VIRTIO_RING_F_INDIRECT_DESC);
524 if (req_features == 0)
526 req_features = supported_features;
529 vif->features = req_features & vif->remote_features & supported_features;
532 remote_features & vif->features & VIRTIO_FEATURE (VIRTIO_NET_F_MTU))
534 virtio_net_config_t config;
535 virtio_pci_legacy_read_config (vm, vif, &config.mtu,
536 sizeof (config.mtu), 10);
538 vif->features &= ~VIRTIO_FEATURE (VIRTIO_NET_F_MTU);
541 vif->features = virtio_pci_legacy_set_features (vm, vif, vif->features);
545 virtio_pci_read_device_feature (vlib_main_t * vm, virtio_if_t * vif)
547 vif->remote_features = virtio_pci_legacy_get_features (vm, vif);
551 virtio_pci_reset_device (vlib_main_t * vm, virtio_if_t * vif)
558 status = virtio_pci_legacy_reset (vm, vif);
561 * Set the Acknowledge status bit
563 virtio_pci_legacy_set_status (vm, vif, VIRTIO_CONFIG_STATUS_ACK);
566 * Set the Driver status bit
568 virtio_pci_legacy_set_status (vm, vif, VIRTIO_CONFIG_STATUS_DRIVER);
571 * Read the status and verify it
573 status = virtio_pci_legacy_get_status (vm, vif);
575 ((status & VIRTIO_CONFIG_STATUS_ACK)
576 && (status & VIRTIO_CONFIG_STATUS_DRIVER)))
578 vif->status = status;
584 virtio_pci_read_caps (vlib_main_t * vm, virtio_if_t * vif)
586 clib_error_t *error = 0;
587 virtio_main_t *vim = &virtio_main;
588 struct virtio_pci_cap cap;
589 u8 pos, common_cfg = 0, notify_base = 0, dev_cfg = 0, isr = 0, pci_cfg = 0;
590 vlib_pci_dev_handle_t h = vif->pci_dev_handle;
592 if ((error = vlib_pci_read_config_u8 (vm, h, PCI_CAPABILITY_LIST, &pos)))
593 clib_error_return (error, "error in reading capabilty list position");
598 vlib_pci_read_write_config (vm, h, VLIB_READ, pos, &cap,
600 clib_error_return (error, "error in reading the capability at [%2x]",
603 if (cap.cap_vndr == PCI_CAP_ID_MSIX)
607 vlib_pci_read_write_config (vm, h, VLIB_READ, pos + 2, &flags,
609 clib_error_return (error,
610 "error in reading the capability at [%2x]",
613 if (flags & PCI_MSIX_ENABLE)
614 msix_enabled = VIRTIO_MSIX_ENABLED;
616 msix_enabled = VIRTIO_MSIX_DISABLED;
619 if (cap.cap_vndr != PCI_CAP_ID_VNDR)
621 virtio_log_debug (vim, vif, "[%2x] %s %2x ", pos,
622 "skipping non VNDR cap id:", cap.cap_vndr);
626 switch (cap.cfg_type)
628 case VIRTIO_PCI_CAP_COMMON_CFG:
631 case VIRTIO_PCI_CAP_NOTIFY_CFG:
634 case VIRTIO_PCI_CAP_DEVICE_CFG:
637 case VIRTIO_PCI_CAP_ISR_CFG:
640 case VIRTIO_PCI_CAP_PCI_CFG:
649 if (common_cfg == 0 || notify_base == 0 || dev_cfg == 0 || isr == 0)
651 virtio_log_debug (vim, vif, "legacy virtio pci device found");
656 clib_error_return (error, "modern virtio pci device found");
658 virtio_log_debug (vim, vif, "transitional virtio pci device found");
662 static clib_error_t *
663 virtio_pci_device_init (vlib_main_t * vm, virtio_if_t * vif,
664 virtio_pci_create_if_args_t * args)
666 clib_error_t *error = 0;
669 if ((error = virtio_pci_read_caps (vm, vif)))
670 clib_error_return (error, "Device not supported");
672 if (virtio_pci_reset_device (vm, vif) < 0)
673 clib_error_return (error, "Failed to reset the device");
676 * read device features and negotiate (user) requested features
678 virtio_pci_read_device_feature (vm, vif);
679 virtio_negotiate_features (vm, vif, args->features);
682 * After FEATURE_OK, driver should not accept new feature bits
684 virtio_pci_legacy_set_status (vm, vif, VIRTIO_CONFIG_STATUS_FEATURES_OK);
685 status = virtio_pci_legacy_get_status (vm, vif);
686 if (!(status & VIRTIO_CONFIG_STATUS_FEATURES_OK))
687 clib_error_return (error, "Device doesn't support requested features");
689 vif->status = status;
691 if (virtio_pci_get_mac (vm, vif))
693 f64 now = vlib_time_now (vm);
695 rnd = (u32) (now * 1e6);
696 rnd = random_u32 (&rnd);
698 memcpy (vif->mac_addr + 2, &rnd, sizeof (rnd));
699 vif->mac_addr[0] = 2;
700 vif->mac_addr[1] = 0xfe;
701 virtio_pci_set_mac (vm, vif);
704 virtio_set_net_hdr_size (vif);
706 if ((error = virtio_pci_get_max_virtqueue_pairs (vm, vif)))
709 if ((error = virtio_pci_vring_init (vm, vif, 0)))
712 if ((error = virtio_pci_vring_init (vm, vif, 1)))
715 if (msix_enabled == VIRTIO_MSIX_ENABLED)
717 virtio_pci_legacy_set_config_irq (vm, vif, VIRTIO_MSI_NO_VECTOR);
718 virtio_pci_legacy_set_queue_irq (vm, vif, VIRTIO_MSI_NO_VECTOR, 0);
720 virtio_pci_legacy_set_status (vm, vif, VIRTIO_CONFIG_STATUS_DRIVER_OK);
721 vif->status = virtio_pci_legacy_get_status (vm, vif);
727 virtio_pci_create_if (vlib_main_t * vm, virtio_pci_create_if_args_t * args)
729 vnet_main_t *vnm = vnet_get_main ();
730 virtio_main_t *vim = &virtio_main;
732 vlib_pci_dev_handle_t h;
733 clib_error_t *error = 0;
735 if (args->rxq_size == 0)
736 args->rxq_size = VIRTIO_NUM_RX_DESC;
737 if (args->txq_size == 0)
738 args->txq_size = VIRTIO_NUM_TX_DESC;
740 if (!virtio_pci_queue_size_valid (args->rxq_size) ||
741 !virtio_pci_queue_size_valid (args->txq_size))
743 args->rv = VNET_API_ERROR_INVALID_VALUE;
745 clib_error_return (error,
746 "queue size must be <= 4096, >= 64, "
747 "and multiples of 64");
748 vlib_log (VLIB_LOG_LEVEL_ERR, vim->log_default, "%U: %s",
749 format_vlib_pci_addr, &args->addr,
750 "queue size must be <= 4096, >= 64, and multiples of 64");
755 pool_foreach (vif, vim->interfaces, ({
756 if (vif->pci_addr.as_u32 == args->addr)
758 args->rv = VNET_API_ERROR_INVALID_VALUE;
760 clib_error_return (error, "PCI address in use");
761 vlib_log (VLIB_LOG_LEVEL_ERR, vim->log_default, "%U: %s",
762 format_vlib_pci_addr, &args->addr,
763 " PCI address in use");
769 pool_get (vim->interfaces, vif);
770 vif->dev_instance = vif - vim->interfaces;
771 vif->per_interface_next_index = ~0;
772 vif->pci_addr.as_u32 = args->addr;
774 if ((vif->fd = open ("/dev/vhost-net", O_RDWR | O_NONBLOCK)) < 0)
776 args->rv = VNET_API_ERROR_SYSCALL_ERROR_1;
777 args->error = clib_error_return_unix (0, "open '/dev/vhost-net'");
782 vlib_pci_device_open (vm, (vlib_pci_addr_t *) & vif->pci_addr,
783 virtio_pci_device_ids, &h)))
785 pool_put (vim->interfaces, vif);
786 args->rv = VNET_API_ERROR_INVALID_INTERFACE;
788 clib_error_return (error, "pci-addr %U", format_vlib_pci_addr,
790 vlib_log (VLIB_LOG_LEVEL_ERR, vim->log_default, "%U: %s",
791 format_vlib_pci_addr, &vif->pci_addr,
792 "error encountered on pci device open");
795 vif->pci_dev_handle = h;
796 vlib_pci_set_private_data (vm, h, vif->dev_instance);
798 if ((error = vlib_pci_bus_master_enable (vm, h)))
800 virtio_log_error (vim, vif,
801 "error encountered on pci bus master enable");
805 if ((error = vlib_pci_io_region (vm, h, 0)))
807 virtio_log_error (vim, vif, "error encountered on pci io region");
811 if ((error = virtio_pci_device_init (vm, vif, args)))
813 virtio_log_error (vim, vif, "error encountered on device init");
817 if (msix_enabled == VIRTIO_MSIX_ENABLED)
819 if ((error = vlib_pci_register_msix_handler (vm, h, 0, 1,
820 &virtio_pci_irq_0_handler)))
822 virtio_log_error (vim, vif,
823 "error encountered on pci register msix handler 0");
826 if ((error = vlib_pci_register_msix_handler (vm, h, 1, 1,
827 &virtio_pci_irq_1_handler)))
829 virtio_log_error (vim, vif,
830 "error encountered on pci register msix handler 1");
834 if ((error = vlib_pci_enable_msix_irq (vm, h, 0, 2)))
836 virtio_log_error (vim, vif,
837 "error encountered on pci enable msix irq");
843 vlib_pci_register_intx_handler (vm, h, &virtio_pci_irq_handler);
846 if ((error = vlib_pci_intr_enable (vm, h)))
848 virtio_log_error (vim, vif,
849 "error encountered on pci interrupt enable");
853 vif->type = VIRTIO_IF_TYPE_PCI;
854 /* create interface */
855 error = ethernet_register_interface (vnm, virtio_device_class.index,
856 vif->dev_instance, vif->mac_addr,
858 virtio_pci_flag_change);
862 virtio_log_error (vim, vif,
863 "error encountered on ethernet register interface");
867 vnet_sw_interface_t *sw = vnet_get_hw_sw_interface (vnm, vif->hw_if_index);
868 vif->sw_if_index = sw->sw_if_index;
869 args->sw_if_index = sw->sw_if_index;
871 vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, vif->hw_if_index);
872 hw->flags |= VNET_HW_INTERFACE_FLAG_SUPPORTS_INT_MODE;
873 vnet_hw_interface_set_input_node (vnm, vif->hw_if_index,
874 virtio_input_node.index);
875 vnet_hw_interface_assign_rx_thread (vnm, vif->hw_if_index, 0, ~0);
876 virtio_vring_set_numa_node (vm, vif, 0);
878 if (virtio_pci_is_link_up (vm, vif) & VIRTIO_NET_S_LINK_UP)
880 vif->flags |= VIRTIO_IF_FLAG_ADMIN_UP;
881 vnet_hw_interface_set_flags (vnm, vif->hw_if_index,
882 VNET_HW_INTERFACE_FLAG_LINK_UP);
885 vnet_hw_interface_set_flags (vnm, vif->hw_if_index, 0);
889 virtio_pci_delete_if (vm, vif);
890 args->rv = VNET_API_ERROR_INVALID_INTERFACE;
895 virtio_pci_delete_if (vlib_main_t * vm, virtio_if_t * vif)
897 vnet_main_t *vnm = vnet_get_main ();
898 virtio_main_t *vim = &virtio_main;
901 if (vif->type != VIRTIO_IF_TYPE_PCI)
902 return VNET_API_ERROR_INVALID_INTERFACE;
904 vlib_pci_intr_disable (vm, vif->pci_dev_handle);
906 virtio_pci_legacy_del_queue (vm, vif, 0);
907 virtio_pci_legacy_del_queue (vm, vif, 1);
909 virtio_pci_legacy_reset (vm, vif);
911 if (vif->hw_if_index)
913 vnet_hw_interface_set_flags (vnm, vif->hw_if_index, 0);
914 vnet_hw_interface_unassign_rx_thread (vnm, vif->hw_if_index, 0);
915 ethernet_delete_interface (vnm, vif->hw_if_index);
918 vlib_pci_device_close (vm, vif->pci_dev_handle);
920 vec_foreach_index (i, vif->vrings)
922 virtio_vring_t *vring = vec_elt_at_index (vif->vrings, i);
923 if (vring->kick_fd != -1)
924 close (vring->kick_fd);
928 virtio_free_used_desc (vm, vring);
930 virtio_free_rx_buffers (vm, vring);
932 if (vring->queue_id % 2)
934 vlib_buffer_free_no_next (vm, vring->indirect_buffers, vring->size);
936 vec_free (vring->buffers);
937 vec_free (vring->indirect_buffers);
938 vlib_physmem_free (vm, vring->desc);
941 vec_free (vif->vrings);
945 if (vif->tap_fd != -1)
947 clib_error_free (vif->error);
948 memset (vif, 0, sizeof (*vif));
949 pool_put (vim->interfaces, vif);
955 * fd.io coding-style-patch-verification: ON
958 * eval: (c-set-style "gnu")