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_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_set_features (vlib_main_t * vm, virtio_if_t * vif,
125 if ((features >> 32) != 0)
127 clib_warning ("only 32 bit features are allowed for legacy virtio!");
129 u32 feature = 0, guest_features = (u32) features;
130 vlib_pci_write_io_u32 (vm, vif->pci_dev_handle, VIRTIO_PCI_GUEST_FEATURES,
132 vlib_pci_read_io_u32 (vm, vif->pci_dev_handle, VIRTIO_PCI_GUEST_FEATURES,
138 virtio_pci_legacy_get_status (vlib_main_t * vm, virtio_if_t * vif)
141 vlib_pci_read_io_u8 (vm, vif->pci_dev_handle, VIRTIO_PCI_STATUS, &status);
146 virtio_pci_legacy_set_status (vlib_main_t * vm, virtio_if_t * vif, u8 status)
148 if (status != VIRTIO_CONFIG_STATUS_RESET)
149 status |= virtio_pci_legacy_get_status (vm, vif);
150 vlib_pci_write_io_u8 (vm, vif->pci_dev_handle, VIRTIO_PCI_STATUS, &status);
154 virtio_pci_legacy_reset (vlib_main_t * vm, virtio_if_t * vif)
156 virtio_pci_legacy_set_status (vm, vif, VIRTIO_CONFIG_STATUS_RESET);
157 return virtio_pci_legacy_get_status (vm, vif);
161 virtio_pci_legacy_get_isr (vlib_main_t * vm, virtio_if_t * vif)
164 vlib_pci_read_io_u8 (vm, vif->pci_dev_handle, VIRTIO_PCI_ISR, &isr);
169 virtio_pci_legacy_get_queue_num (vlib_main_t * vm, virtio_if_t * vif,
173 vlib_pci_write_io_u16 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_SEL,
175 vlib_pci_read_io_u16 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_NUM,
182 virtio_pci_legacy_setup_queue (vlib_main_t * vm, virtio_if_t * vif,
183 u16 queue_id, void *p)
185 u64 addr = vlib_physmem_get_pa (vm, p) >> VIRTIO_PCI_QUEUE_ADDR_SHIFT;
186 vlib_pci_write_io_u16 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_SEL,
188 vlib_pci_write_io_u32 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_PFN,
193 virtio_pci_legacy_del_queue (vlib_main_t * vm, virtio_if_t * vif,
197 vlib_pci_write_io_u16 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_SEL,
199 vlib_pci_write_io_u32 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_PFN, &src);
203 virtio_pci_legacy_notify_queue (vlib_main_t * vm, virtio_if_t * vif,
206 vlib_pci_write_io_u16 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_NOTIFY,
210 /* Enable one vector (0) for Link State Intrerrupt */
212 virtio_pci_legacy_set_config_irq (vlib_main_t * vm, virtio_if_t * vif,
215 vlib_pci_write_io_u16 (vm, vif->pci_dev_handle, VIRTIO_MSI_CONFIG_VECTOR,
217 vlib_pci_read_io_u16 (vm, vif->pci_dev_handle, VIRTIO_MSI_CONFIG_VECTOR,
223 virtio_pci_legacy_set_queue_irq (vlib_main_t * vm, virtio_if_t * vif, u16 vec,
226 vlib_pci_write_io_u16 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_SEL,
228 vlib_pci_write_io_u16 (vm, vif->pci_dev_handle, VIRTIO_MSI_QUEUE_VECTOR,
230 vlib_pci_read_io_u16 (vm, vif->pci_dev_handle, VIRTIO_MSI_QUEUE_VECTOR,
236 virtio_pci_flag_change (vnet_main_t * vnm, vnet_hw_interface_t * hw,
242 static clib_error_t *
243 virtio_pci_get_max_virtqueue_pairs (vlib_main_t * vm, virtio_if_t * vif)
245 virtio_main_t *vim = &virtio_main;
246 virtio_net_config_t config;
247 clib_error_t *error = 0;
248 u16 max_queue_pairs = 1;
250 if (vif->features & VIRTIO_FEATURE (VIRTIO_NET_F_MQ))
252 virtio_pci_legacy_read_config (vm, vif, &config.max_virtqueue_pairs,
253 sizeof (config.max_virtqueue_pairs), 8);
254 max_queue_pairs = config.max_virtqueue_pairs;
257 virtio_log_debug (vim, vif, "max queue pair is %x", max_queue_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);
410 if (vif->msix_enabled == VIRTIO_MSIX_ENABLED)
412 vlib_pci_read_io_u16 (vm, vif->pci_dev_handle, VIRTIO_MSI_CONFIG_VECTOR,
414 vlib_cli_output (vm, "config vector 0x%x", data_u16);
416 vlib_pci_write_io_u16 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_SEL,
418 vlib_pci_read_io_u16 (vm, vif->pci_dev_handle, VIRTIO_MSI_QUEUE_VECTOR,
420 vlib_cli_output (vm, "queue vector for queue (0) 0x%x", data_u16);
424 virtio_pci_legacy_read_config (vm, vif, mac, sizeof (mac), 0);
425 vlib_cli_output (vm, "mac %U", format_ethernet_address, mac);
426 virtio_pci_legacy_read_config (vm, vif, &data_u16, sizeof (u16), /* offset to status */
428 vlib_cli_output (vm, "link up/down status 0x%x", data_u16);
429 virtio_pci_legacy_read_config (vm, vif, &data_u16, sizeof (u16),
430 /* offset to max_virtqueue */ 8);
431 vlib_cli_output (vm, "num of virtqueue 0x%x", data_u16);
432 virtio_pci_legacy_read_config (vm, vif, &data_u16, sizeof (u16), /* offset to mtu */
434 vlib_cli_output (vm, "mtu 0x%x", data_u16);
436 u32 i = PCI_CONFIG_SIZE (vif) + 12, a = 4;
439 for (; i < 64; i += 4)
442 vlib_pci_read_io_u32 (vm, vif->pci_dev_handle, i, &data);
443 vlib_cli_output (vm, "0x%lx", data);
448 virtio_pci_queue_size_valid (u16 qsz)
450 if (qsz < 64 || qsz > 4096)
458 virtio_pci_vring_init (vlib_main_t * vm, virtio_if_t * vif, u16 idx)
460 clib_error_t *error = 0;
462 virtio_vring_t *vring;
467 queue_size = virtio_pci_legacy_get_queue_num (vm, vif, idx);
468 if (!virtio_pci_queue_size_valid (queue_size))
469 clib_warning ("queue size is not valid");
471 if (!is_pow2 (queue_size))
472 return clib_error_return (0, "ring size must be power of 2");
474 if (queue_size > 32768)
475 return clib_error_return (0, "ring size must be 32768 or lower");
480 vec_validate_aligned (vif->vrings, idx, CLIB_CACHE_LINE_BYTES);
481 vring = vec_elt_at_index (vif->vrings, idx);
483 i = vring_size (queue_size, VIRTIO_PCI_VRING_ALIGN);
484 i = round_pow2 (i, VIRTIO_PCI_VRING_ALIGN);
485 ptr = vlib_physmem_alloc_aligned (vm, i, VIRTIO_PCI_VRING_ALIGN);
487 vring_init (&vr, queue_size, ptr, VIRTIO_PCI_VRING_ALIGN);
488 vring->desc = vr.desc;
489 vring->avail = vr.avail;
490 vring->used = vr.used;
491 vring->queue_id = idx;
492 vring->avail->flags = VIRTIO_RING_FLAG_MASK_INT;
494 ASSERT (vring->buffers == 0);
495 vec_validate_aligned (vring->buffers, queue_size, CLIB_CACHE_LINE_BYTES);
496 ASSERT (vring->indirect_buffers == 0);
497 vec_validate_aligned (vring->indirect_buffers, queue_size,
498 CLIB_CACHE_LINE_BYTES);
504 if (n_alloc < queue_size)
506 vlib_buffer_alloc (vm, vring->indirect_buffers + n_alloc,
507 queue_size - n_alloc);
509 while (n_alloc != queue_size);
510 vif->tx_ring_sz = queue_size;
513 vif->rx_ring_sz = queue_size;
514 vring->size = queue_size;
516 virtio_pci_legacy_setup_queue (vm, vif, idx, ptr);
523 virtio_negotiate_features (vlib_main_t * vm, virtio_if_t * vif,
527 * if features are not requested
528 * default: all supported features
530 u64 supported_features = VIRTIO_FEATURE (VIRTIO_NET_F_MTU)
531 | VIRTIO_FEATURE (VIRTIO_NET_F_MAC)
532 | VIRTIO_FEATURE (VIRTIO_NET_F_MRG_RXBUF)
533 | VIRTIO_FEATURE (VIRTIO_NET_F_STATUS)
534 | VIRTIO_FEATURE (VIRTIO_F_NOTIFY_ON_EMPTY)
535 | VIRTIO_FEATURE (VIRTIO_F_ANY_LAYOUT)
536 | VIRTIO_FEATURE (VIRTIO_RING_F_INDIRECT_DESC);
538 if (req_features == 0)
540 req_features = supported_features;
543 vif->features = req_features & vif->remote_features & supported_features;
546 remote_features & vif->features & VIRTIO_FEATURE (VIRTIO_NET_F_MTU))
548 virtio_net_config_t config;
549 virtio_pci_legacy_read_config (vm, vif, &config.mtu,
550 sizeof (config.mtu), 10);
552 vif->features &= ~VIRTIO_FEATURE (VIRTIO_NET_F_MTU);
555 vif->features = virtio_pci_legacy_set_features (vm, vif, vif->features);
559 virtio_pci_read_device_feature (vlib_main_t * vm, virtio_if_t * vif)
561 vif->remote_features = virtio_pci_legacy_get_features (vm, vif);
565 virtio_pci_reset_device (vlib_main_t * vm, virtio_if_t * vif)
572 status = virtio_pci_legacy_reset (vm, vif);
575 * Set the Acknowledge status bit
577 virtio_pci_legacy_set_status (vm, vif, VIRTIO_CONFIG_STATUS_ACK);
580 * Set the Driver status bit
582 virtio_pci_legacy_set_status (vm, vif, VIRTIO_CONFIG_STATUS_DRIVER);
585 * Read the status and verify it
587 status = virtio_pci_legacy_get_status (vm, vif);
589 ((status & VIRTIO_CONFIG_STATUS_ACK)
590 && (status & VIRTIO_CONFIG_STATUS_DRIVER)))
592 vif->status = status;
598 virtio_pci_read_caps (vlib_main_t * vm, virtio_if_t * vif)
600 clib_error_t *error = 0;
601 virtio_main_t *vim = &virtio_main;
602 struct virtio_pci_cap cap;
603 u8 pos, common_cfg = 0, notify_base = 0, dev_cfg = 0, isr = 0, pci_cfg = 0;
604 vlib_pci_dev_handle_t h = vif->pci_dev_handle;
606 if ((error = vlib_pci_read_config_u8 (vm, h, PCI_CAPABILITY_LIST, &pos)))
608 virtio_log_error (vim, vif, "error in reading capabilty list position");
609 clib_error_return (error, "error in reading capabilty list position");
614 vlib_pci_read_write_config (vm, h, VLIB_READ, pos, &cap,
617 virtio_log_error (vim, vif, "%s [%2x]",
618 "error in reading the capability at", pos);
619 clib_error_return (error,
620 "error in reading the capability at [%2x]", pos);
623 if (cap.cap_vndr == PCI_CAP_ID_MSIX)
625 u16 flags, table_size, table_size_mask = 0x07FF;
628 vlib_pci_read_write_config (vm, h, VLIB_READ, pos + 2, &flags,
630 clib_error_return (error,
631 "error in reading the capability at [%2x]",
634 table_size = flags & table_size_mask;
635 virtio_log_debug (vim, vif, "flags:0x%x %s 0x%x", flags,
636 "msix interrupt vector table-size", table_size);
638 if (flags & PCI_MSIX_ENABLE)
640 virtio_log_debug (vim, vif, "msix interrupt enabled");
641 vif->msix_enabled = VIRTIO_MSIX_ENABLED;
645 virtio_log_debug (vim, vif, "msix interrupt disabled");
646 vif->msix_enabled = VIRTIO_MSIX_DISABLED;
650 if (cap.cap_vndr != PCI_CAP_ID_VNDR)
652 virtio_log_debug (vim, vif, "[%2x] %s %2x ", pos,
653 "skipping non VNDR cap id:", cap.cap_vndr);
657 virtio_log_debug (vim, vif,
658 "[%4x] cfg type: %u, bar: %u, offset: %04x, len: %u",
659 pos, cap.cfg_type, cap.bar, cap.offset, cap.length);
660 switch (cap.cfg_type)
662 case VIRTIO_PCI_CAP_COMMON_CFG:
665 case VIRTIO_PCI_CAP_NOTIFY_CFG:
668 case VIRTIO_PCI_CAP_DEVICE_CFG:
671 case VIRTIO_PCI_CAP_ISR_CFG:
674 case VIRTIO_PCI_CAP_PCI_CFG:
683 if (common_cfg == 0 || notify_base == 0 || dev_cfg == 0 || isr == 0)
685 virtio_log_debug (vim, vif, "legacy virtio pci device found");
690 clib_error_return (error, "modern virtio pci device found");
692 virtio_log_debug (vim, vif, "transitional virtio pci device found");
696 static clib_error_t *
697 virtio_pci_device_init (vlib_main_t * vm, virtio_if_t * vif,
698 virtio_pci_create_if_args_t * args)
700 clib_error_t *error = 0;
701 virtio_main_t *vim = &virtio_main;
704 if ((error = virtio_pci_read_caps (vm, vif)))
705 clib_error_return (error, "Device not supported");
707 if (virtio_pci_reset_device (vm, vif) < 0)
709 virtio_log_error (vim, vif, "Failed to reset the device");
710 clib_error_return (error, "Failed to reset the device");
713 * read device features and negotiate (user) requested features
715 virtio_pci_read_device_feature (vm, vif);
716 virtio_negotiate_features (vm, vif, args->features);
719 * After FEATURE_OK, driver should not accept new feature bits
721 virtio_pci_legacy_set_status (vm, vif, VIRTIO_CONFIG_STATUS_FEATURES_OK);
722 status = virtio_pci_legacy_get_status (vm, vif);
723 if (!(status & VIRTIO_CONFIG_STATUS_FEATURES_OK))
725 virtio_log_error (vim, vif,
726 "error encountered: Device doesn't support requested features");
727 clib_error_return (error, "Device doesn't support requested features");
729 vif->status = status;
731 if (virtio_pci_get_mac (vm, vif))
733 f64 now = vlib_time_now (vm);
735 rnd = (u32) (now * 1e6);
736 rnd = random_u32 (&rnd);
738 memcpy (vif->mac_addr + 2, &rnd, sizeof (rnd));
739 vif->mac_addr[0] = 2;
740 vif->mac_addr[1] = 0xfe;
741 virtio_pci_set_mac (vm, vif);
744 virtio_set_net_hdr_size (vif);
746 if ((error = virtio_pci_get_max_virtqueue_pairs (vm, vif)))
749 if ((error = virtio_pci_vring_init (vm, vif, 0)))
752 if ((error = virtio_pci_vring_init (vm, vif, 1)))
755 if (vif->msix_enabled == VIRTIO_MSIX_ENABLED)
757 if (virtio_pci_legacy_set_config_irq (vm, vif, 1) ==
758 VIRTIO_MSI_NO_VECTOR)
759 virtio_log_warning (vim, vif, "config vector 1 is not set");
760 if (virtio_pci_legacy_set_queue_irq (vm, vif, 0, 0) ==
761 VIRTIO_MSI_NO_VECTOR)
762 virtio_log_warning (vim, vif, "queue vector 0 is not set");
764 virtio_pci_legacy_set_status (vm, vif, VIRTIO_CONFIG_STATUS_DRIVER_OK);
765 vif->status = virtio_pci_legacy_get_status (vm, vif);
771 virtio_pci_create_if (vlib_main_t * vm, virtio_pci_create_if_args_t * args)
773 vnet_main_t *vnm = vnet_get_main ();
774 virtio_main_t *vim = &virtio_main;
776 vlib_pci_dev_handle_t h;
777 clib_error_t *error = 0;
779 if (args->rxq_size == 0)
780 args->rxq_size = VIRTIO_NUM_RX_DESC;
781 if (args->txq_size == 0)
782 args->txq_size = VIRTIO_NUM_TX_DESC;
784 if (!virtio_pci_queue_size_valid (args->rxq_size) ||
785 !virtio_pci_queue_size_valid (args->txq_size))
787 args->rv = VNET_API_ERROR_INVALID_VALUE;
789 clib_error_return (error,
790 "queue size must be <= 4096, >= 64, "
791 "and multiples of 64");
792 vlib_log (VLIB_LOG_LEVEL_ERR, vim->log_default, "%U: %s",
793 format_vlib_pci_addr, &args->addr,
794 "queue size must be <= 4096, >= 64, and multiples of 64");
799 pool_foreach (vif, vim->interfaces, ({
800 if (vif->pci_addr.as_u32 == args->addr)
802 args->rv = VNET_API_ERROR_INVALID_VALUE;
804 clib_error_return (error, "PCI address in use");
805 vlib_log (VLIB_LOG_LEVEL_ERR, vim->log_default, "%U: %s",
806 format_vlib_pci_addr, &args->addr,
807 " PCI address in use");
813 pool_get (vim->interfaces, vif);
814 vif->dev_instance = vif - vim->interfaces;
815 vif->per_interface_next_index = ~0;
816 vif->pci_addr.as_u32 = args->addr;
819 vlib_pci_device_open (vm, (vlib_pci_addr_t *) & vif->pci_addr,
820 virtio_pci_device_ids, &h)))
822 pool_put (vim->interfaces, vif);
823 args->rv = VNET_API_ERROR_INVALID_INTERFACE;
825 clib_error_return (error, "pci-addr %U", format_vlib_pci_addr,
827 vlib_log (VLIB_LOG_LEVEL_ERR, vim->log_default, "%U: %s",
828 format_vlib_pci_addr, &vif->pci_addr,
829 "error encountered on pci device open");
832 vif->pci_dev_handle = h;
833 vlib_pci_set_private_data (vm, h, vif->dev_instance);
835 if ((error = vlib_pci_bus_master_enable (vm, h)))
837 virtio_log_error (vim, vif,
838 "error encountered on pci bus master enable");
842 if ((error = vlib_pci_io_region (vm, h, 0)))
844 virtio_log_error (vim, vif, "error encountered on pci io region");
848 if (vlib_pci_get_num_msix_interrupts (vm, h) > 1)
850 if ((error = vlib_pci_register_msix_handler (vm, h, 0, 1,
851 &virtio_pci_irq_0_handler)))
853 virtio_log_error (vim, vif,
854 "error encountered on pci register msix handler 0");
857 if ((error = vlib_pci_register_msix_handler (vm, h, 1, 1,
858 &virtio_pci_irq_1_handler)))
860 virtio_log_error (vim, vif,
861 "error encountered on pci register msix handler 1");
865 if ((error = vlib_pci_enable_msix_irq (vm, h, 0, 2)))
867 virtio_log_error (vim, vif,
868 "error encountered on pci enable msix irq");
871 vif->support_int_mode = 1;
872 virtio_log_debug (vim, vif, "device supports msix interrupts");
874 else if (vlib_pci_get_num_msix_interrupts (vm, h) == 1)
877 * if msix table-size is 1, fall back to intX.
880 vlib_pci_register_intx_handler (vm, h, &virtio_pci_irq_handler)))
882 virtio_log_error (vim, vif,
883 "error encountered on pci register interrupt handler");
886 vif->support_int_mode = 1;
887 virtio_log_debug (vim, vif, "pci register interrupt handler");
892 * WARN: intX is showing some weird behaviour.
893 * Please don't use interrupt mode with UIO driver.
895 vif->support_int_mode = 0;
896 virtio_log_debug (vim, vif, "driver is configured in poll mode only");
899 if ((error = vlib_pci_intr_enable (vm, h)))
901 virtio_log_error (vim, vif,
902 "error encountered on pci interrupt enable");
906 if ((error = virtio_pci_device_init (vm, vif, args)))
908 virtio_log_error (vim, vif, "error encountered on device init");
912 vif->type = VIRTIO_IF_TYPE_PCI;
913 /* create interface */
914 error = ethernet_register_interface (vnm, virtio_device_class.index,
915 vif->dev_instance, vif->mac_addr,
917 virtio_pci_flag_change);
921 virtio_log_error (vim, vif,
922 "error encountered on ethernet register interface");
926 vnet_sw_interface_t *sw = vnet_get_hw_sw_interface (vnm, vif->hw_if_index);
927 vif->sw_if_index = sw->sw_if_index;
928 args->sw_if_index = sw->sw_if_index;
930 vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, vif->hw_if_index);
931 hw->flags |= VNET_HW_INTERFACE_FLAG_SUPPORTS_INT_MODE;
932 vnet_hw_interface_set_input_node (vnm, vif->hw_if_index,
933 virtio_input_node.index);
934 vnet_hw_interface_assign_rx_thread (vnm, vif->hw_if_index, 0, ~0);
935 virtio_vring_set_numa_node (vm, vif, 0);
937 vnet_hw_interface_set_rx_mode (vnm, vif->hw_if_index, 0,
938 VNET_HW_INTERFACE_RX_MODE_POLLING);
939 if (virtio_pci_is_link_up (vm, vif) & VIRTIO_NET_S_LINK_UP)
941 vif->flags |= VIRTIO_IF_FLAG_ADMIN_UP;
942 vnet_hw_interface_set_flags (vnm, vif->hw_if_index,
943 VNET_HW_INTERFACE_FLAG_LINK_UP);
946 vnet_hw_interface_set_flags (vnm, vif->hw_if_index, 0);
950 virtio_pci_delete_if (vm, vif);
951 args->rv = VNET_API_ERROR_INVALID_INTERFACE;
956 virtio_pci_delete_if (vlib_main_t * vm, virtio_if_t * vif)
958 vnet_main_t *vnm = vnet_get_main ();
959 virtio_main_t *vim = &virtio_main;
962 if (vif->type != VIRTIO_IF_TYPE_PCI)
963 return VNET_API_ERROR_INVALID_INTERFACE;
965 vlib_pci_intr_disable (vm, vif->pci_dev_handle);
967 virtio_pci_legacy_del_queue (vm, vif, 0);
968 virtio_pci_legacy_del_queue (vm, vif, 1);
970 virtio_pci_legacy_reset (vm, vif);
972 if (vif->hw_if_index)
974 vnet_hw_interface_set_flags (vnm, vif->hw_if_index, 0);
975 vnet_hw_interface_unassign_rx_thread (vnm, vif->hw_if_index, 0);
976 ethernet_delete_interface (vnm, vif->hw_if_index);
979 vlib_pci_device_close (vm, vif->pci_dev_handle);
981 vec_foreach_index (i, vif->vrings)
983 virtio_vring_t *vring = vec_elt_at_index (vif->vrings, i);
984 if (vring->kick_fd != -1)
985 close (vring->kick_fd);
989 virtio_free_used_desc (vm, vring);
991 virtio_free_rx_buffers (vm, vring);
993 if (vring->queue_id % 2)
995 vlib_buffer_free_no_next (vm, vring->indirect_buffers, vring->size);
997 vec_free (vring->buffers);
998 vec_free (vring->indirect_buffers);
999 vlib_physmem_free (vm, vring->desc);
1002 vec_free (vif->vrings);
1006 if (vif->tap_fd != -1)
1008 clib_error_free (vif->error);
1009 memset (vif, 0, sizeof (*vif));
1010 pool_put (vim->interfaces, vif);
1016 * fd.io coding-style-patch-verification: ON
1019 * eval: (c-set-style "gnu")