blob: 020b088d3460cd74182bff4e70f4bde2257993bd [file] [log] [blame]
/*
* Copyright (c) 2018 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <fcntl.h>
#include <sys/ioctl.h>
#include <vppinfra/types.h>
#include <vlib/vlib.h>
#include <vlib/pci/pci.h>
#include <vnet/ethernet/ethernet.h>
#include <vnet/ip/ip4_packet.h>
#include <vnet/ip/ip6_packet.h>
#include <vnet/devices/virtio/virtio.h>
#include <vnet/devices/virtio/pci.h>
#define PCI_VENDOR_ID_VIRTIO 0x1af4
#define PCI_DEVICE_ID_VIRTIO_NIC 0x1000
/* Doesn't support modern device */
#define PCI_DEVICE_ID_VIRTIO_NIC_MODERN 0x1041
#define PCI_CAPABILITY_LIST 0x34
#define PCI_CAP_ID_VNDR 0x09
#define PCI_CAP_ID_MSIX 0x11
#define PCI_MSIX_ENABLE 0x8000
#define PCI_CONFIG_SIZE(vif) ((vif->msix_enabled == VIRTIO_MSIX_ENABLED) ? \
24 : 20)
static pci_device_id_t virtio_pci_device_ids[] = {
{
.vendor_id = PCI_VENDOR_ID_VIRTIO,
.device_id = PCI_DEVICE_ID_VIRTIO_NIC},
{
.vendor_id = PCI_VENDOR_ID_VIRTIO,
.device_id = PCI_DEVICE_ID_VIRTIO_NIC_MODERN},
{0},
};
static void
virtio_pci_legacy_read_config (vlib_main_t * vm, virtio_if_t * vif, void *dst,
int len, u32 addr)
{
u32 size = 0;
vlib_pci_dev_handle_t h = vif->pci_dev_handle;
while (len > 0)
{
if (len >= 4)
{
size = 4;
vlib_pci_read_io_u32 (vm, h, PCI_CONFIG_SIZE (vif) + addr, dst);
}
else if (len >= 2)
{
size = 2;
vlib_pci_read_io_u16 (vm, h, PCI_CONFIG_SIZE (vif) + addr, dst);
}
else
{
size = 1;
vlib_pci_read_io_u8 (vm, h, PCI_CONFIG_SIZE (vif) + addr, dst);
}
dst = (u8 *) dst + size;
addr += size;
len -= size;
}
}
static void
virtio_pci_legacy_write_config (vlib_main_t * vm, virtio_if_t * vif,
void *src, int len, u32 addr)
{
u32 size = 0;
vlib_pci_dev_handle_t h = vif->pci_dev_handle;
while (len > 0)
{
if (len >= 4)
{
size = 4;
vlib_pci_write_io_u32 (vm, h, PCI_CONFIG_SIZE (vif) + addr, src);
}
else if (len >= 2)
{
size = 2;
vlib_pci_write_io_u16 (vm, h, PCI_CONFIG_SIZE (vif) + addr, src);
}
else
{
size = 1;
vlib_pci_write_io_u8 (vm, h, PCI_CONFIG_SIZE (vif) + addr, src);
}
src = (u8 *) src + size;
addr += size;
len -= size;
}
}
static u64
virtio_pci_legacy_get_features (vlib_main_t * vm, virtio_if_t * vif)
{
u32 features;
vlib_pci_read_io_u32 (vm, vif->pci_dev_handle, VIRTIO_PCI_HOST_FEATURES,
&features);
return features;
}
static u32
virtio_pci_legacy_set_features (vlib_main_t * vm, virtio_if_t * vif,
u64 features)
{
if ((features >> 32) != 0)
{
clib_warning ("only 32 bit features are allowed for legacy virtio!");
}
u32 feature = 0, guest_features = (u32) features;
vlib_pci_write_io_u32 (vm, vif->pci_dev_handle, VIRTIO_PCI_GUEST_FEATURES,
&guest_features);
vlib_pci_read_io_u32 (vm, vif->pci_dev_handle, VIRTIO_PCI_GUEST_FEATURES,
&feature);
return feature;
}
static u8
virtio_pci_legacy_get_status (vlib_main_t * vm, virtio_if_t * vif)
{
u8 status = 0;
vlib_pci_read_io_u8 (vm, vif->pci_dev_handle, VIRTIO_PCI_STATUS, &status);
return status;
}
static void
virtio_pci_legacy_set_status (vlib_main_t * vm, virtio_if_t * vif, u8 status)
{
if (status != VIRTIO_CONFIG_STATUS_RESET)
status |= virtio_pci_legacy_get_status (vm, vif);
vlib_pci_write_io_u8 (vm, vif->pci_dev_handle, VIRTIO_PCI_STATUS, &status);
}
static u8
virtio_pci_legacy_reset (vlib_main_t * vm, virtio_if_t * vif)
{
virtio_pci_legacy_set_status (vm, vif, VIRTIO_CONFIG_STATUS_RESET);
return virtio_pci_legacy_get_status (vm, vif);
}
static u8
virtio_pci_legacy_get_isr (vlib_main_t * vm, virtio_if_t * vif)
{
u8 isr = 0;
vlib_pci_read_io_u8 (vm, vif->pci_dev_handle, VIRTIO_PCI_ISR, &isr);
return isr;
}
static u16
virtio_pci_legacy_get_queue_num (vlib_main_t * vm, virtio_if_t * vif,
u16 queue_id)
{
u16 queue_num = 0;
vlib_pci_write_io_u16 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_SEL,
&queue_id);
vlib_pci_read_io_u16 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_NUM,
&queue_num);
return queue_num;
}
static void
virtio_pci_legacy_setup_queue (vlib_main_t * vm, virtio_if_t * vif,
u16 queue_id, void *p)
{
u64 addr = vlib_physmem_get_pa (vm, p) >> VIRTIO_PCI_QUEUE_ADDR_SHIFT;
vlib_pci_write_io_u16 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_SEL,
&queue_id);
vlib_pci_write_io_u32 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_PFN,
(u32 *) & addr);
}
static void
virtio_pci_legacy_del_queue (vlib_main_t * vm, virtio_if_t * vif,
u16 queue_id)
{
u32 src = 0;
vlib_pci_write_io_u16 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_SEL,
&queue_id);
vlib_pci_write_io_u32 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_PFN, &src);
}
inline void
virtio_pci_legacy_notify_queue (vlib_main_t * vm, virtio_if_t * vif,
u16 queue_id)
{
vlib_pci_write_io_u16 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_NOTIFY,
&queue_id);
}
/* Enable one vector (0) for Link State Intrerrupt */
static u16
virtio_pci_legacy_set_config_irq (vlib_main_t * vm, virtio_if_t * vif,
u16 vec)
{
vlib_pci_write_io_u16 (vm, vif->pci_dev_handle, VIRTIO_MSI_CONFIG_VECTOR,
&vec);
vlib_pci_read_io_u16 (vm, vif->pci_dev_handle, VIRTIO_MSI_CONFIG_VECTOR,
&vec);
return vec;
}
static u16
virtio_pci_legacy_set_queue_irq (vlib_main_t * vm, virtio_if_t * vif, u16 vec,
u16 queue_id)
{
vlib_pci_write_io_u16 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_SEL,
&queue_id);
vlib_pci_write_io_u16 (vm, vif->pci_dev_handle, VIRTIO_MSI_QUEUE_VECTOR,
&vec);
vlib_pci_read_io_u16 (vm, vif->pci_dev_handle, VIRTIO_MSI_QUEUE_VECTOR,
&vec);
return vec;
}
static u32
virtio_pci_flag_change (vnet_main_t * vnm, vnet_hw_interface_t * hw,
u32 flags)
{
return 0;
}
static clib_error_t *
virtio_pci_get_max_virtqueue_pairs (vlib_main_t * vm, virtio_if_t * vif)
{
virtio_main_t *vim = &virtio_main;
virtio_net_config_t config;
clib_error_t *error = 0;
u16 max_queue_pairs = 1;
if (vif->features & VIRTIO_FEATURE (VIRTIO_NET_F_MQ))
{
virtio_pci_legacy_read_config (vm, vif, &config.max_virtqueue_pairs,
sizeof (config.max_virtqueue_pairs), 8);
max_queue_pairs = config.max_virtqueue_pairs;
}
virtio_log_debug (vim, vif, "max queue pair is %x", max_queue_pairs);
if (max_queue_pairs < 1 || max_queue_pairs > 0x8000)
clib_error_return (error, "max queue pair is %x", max_queue_pairs);
vif->max_queue_pairs = max_queue_pairs;
return error;
}
static void
virtio_pci_set_mac (vlib_main_t * vm, virtio_if_t * vif)
{
virtio_pci_legacy_write_config (vm, vif, vif->mac_addr,
sizeof (vif->mac_addr), 0);
}
static u32
virtio_pci_get_mac (vlib_main_t * vm, virtio_if_t * vif)
{
if (vif->remote_features & VIRTIO_FEATURE (VIRTIO_NET_F_MAC))
{
virtio_pci_legacy_read_config (vm, vif, vif->mac_addr,
sizeof (vif->mac_addr), 0);
return 0;
}
return 1;
}
static u16
virtio_pci_is_link_up (vlib_main_t * vm, virtio_if_t * vif)
{
/*
* Minimal driver: assumes link is up
*/
u16 status = 1;
if (vif->remote_features & VIRTIO_FEATURE (VIRTIO_NET_F_STATUS))
virtio_pci_legacy_read_config (vm, vif, &status, sizeof (status), /* mac */
6);
return status;
}
static void
virtio_pci_irq_0_handler (vlib_main_t * vm, vlib_pci_dev_handle_t h, u16 line)
{
vnet_main_t *vnm = vnet_get_main ();
virtio_main_t *vim = &virtio_main;
uword pd = vlib_pci_get_private_data (vm, h);
virtio_if_t *vif = pool_elt_at_index (vim->interfaces, pd);
u16 qid = line;
vnet_device_input_set_interrupt_pending (vnm, vif->hw_if_index, qid);
}
static void
virtio_pci_irq_1_handler (vlib_main_t * vm, vlib_pci_dev_handle_t h, u16 line)
{
vnet_main_t *vnm = vnet_get_main ();
virtio_main_t *vim = &virtio_main;
uword pd = vlib_pci_get_private_data (vm, h);
virtio_if_t *vif = pool_elt_at_index (vim->interfaces, pd);
if (virtio_pci_is_link_up (vm, vif) & VIRTIO_NET_S_LINK_UP)
{
vif->flags |= VIRTIO_IF_FLAG_ADMIN_UP;
vnet_hw_interface_set_flags (vnm, vif->hw_if_index,
VNET_HW_INTERFACE_FLAG_LINK_UP);
}
else
{
vif->flags &= ~VIRTIO_IF_FLAG_ADMIN_UP;
vnet_hw_interface_set_flags (vnm, vif->hw_if_index, 0);
}
}
static void
virtio_pci_irq_handler (vlib_main_t * vm, vlib_pci_dev_handle_t h)
{
virtio_main_t *vim = &virtio_main;
uword pd = vlib_pci_get_private_data (vm, h);
virtio_if_t *vif = pool_elt_at_index (vim->interfaces, pd);
u8 isr = 0;
u16 line = 0;
isr = virtio_pci_legacy_get_isr (vm, vif);
/*
* If the lower bit is set: look through the used rings of
* all virtqueues for the device, to see if any progress has
* been made by the device which requires servicing.
*/
if (isr & VIRTIO_PCI_ISR_INTR)
virtio_pci_irq_0_handler (vm, h, line);
if (isr & VIRTIO_PCI_ISR_CONFIG)
virtio_pci_irq_1_handler (vm, h, line);
}
inline void
device_status (vlib_main_t * vm, virtio_if_t * vif)
{
struct status_struct
{
u8 bit;
char *str;
};
struct status_struct *status_entry;
static struct status_struct status_array[] = {
#define _(s,b) { .str = #s, .bit = b, },
foreach_virtio_config_status_flags
#undef _
{.str = NULL}
};
vlib_cli_output (vm, " status 0x%x", vif->status);
status_entry = (struct status_struct *) &status_array;
while (status_entry->str)
{
if (vif->status & status_entry->bit)
vlib_cli_output (vm, " %s (%x)", status_entry->str,
status_entry->bit);
status_entry++;
}
}
inline void
debug_device_config_space (vlib_main_t * vm, virtio_if_t * vif)
{
u32 data_u32;
u16 data_u16;
u8 data_u8;
vlib_pci_read_io_u32 (vm, vif->pci_dev_handle, VIRTIO_PCI_HOST_FEATURES,
&data_u32);
vlib_cli_output (vm, "remote features 0x%lx", data_u32);
vlib_pci_read_io_u32 (vm, vif->pci_dev_handle, VIRTIO_PCI_GUEST_FEATURES,
&data_u32);
vlib_cli_output (vm, "guest features 0x%lx", data_u32);
vlib_pci_read_io_u32 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_PFN,
&data_u32);
vlib_cli_output (vm, "queue address 0x%lx", data_u32);
vlib_pci_read_io_u16 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_NUM,
&data_u16);
vlib_cli_output (vm, "queue size 0x%x", data_u16);
vlib_pci_read_io_u16 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_SEL,
&data_u16);
vlib_cli_output (vm, "queue select 0x%x", data_u16);
vlib_pci_read_io_u16 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_NOTIFY,
&data_u16);
vlib_cli_output (vm, "queue notify 0x%x", data_u16);
vlib_pci_read_io_u8 (vm, vif->pci_dev_handle, VIRTIO_PCI_STATUS, &data_u8);
vlib_cli_output (vm, "status 0x%x", data_u8);
vlib_pci_read_io_u8 (vm, vif->pci_dev_handle, VIRTIO_PCI_ISR, &data_u8);
vlib_cli_output (vm, "isr 0x%x", data_u8);
if (vif->msix_enabled == VIRTIO_MSIX_ENABLED)
{
vlib_pci_read_io_u16 (vm, vif->pci_dev_handle, VIRTIO_MSI_CONFIG_VECTOR,
&data_u16);
vlib_cli_output (vm, "config vector 0x%x", data_u16);
u16 queue_id = 0;
vlib_pci_write_io_u16 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_SEL,
&queue_id);
vlib_pci_read_io_u16 (vm, vif->pci_dev_handle, VIRTIO_MSI_QUEUE_VECTOR,
&data_u16);
vlib_cli_output (vm, "queue vector for queue (0) 0x%x", data_u16);
}
u8 mac[6];
virtio_pci_legacy_read_config (vm, vif, mac, sizeof (mac), 0);
vlib_cli_output (vm, "mac %U", format_ethernet_address, mac);
virtio_pci_legacy_read_config (vm, vif, &data_u16, sizeof (u16), /* offset to status */
6);
vlib_cli_output (vm, "link up/down status 0x%x", data_u16);
virtio_pci_legacy_read_config (vm, vif, &data_u16, sizeof (u16),
/* offset to max_virtqueue */ 8);
vlib_cli_output (vm, "num of virtqueue 0x%x", data_u16);
virtio_pci_legacy_read_config (vm, vif, &data_u16, sizeof (u16), /* offset to mtu */
10);
vlib_cli_output (vm, "mtu 0x%x", data_u16);
u32 i = PCI_CONFIG_SIZE (vif) + 12, a = 4;
i += a;
i &= ~a;
for (; i < 64; i += 4)
{
u32 data = 0;
vlib_pci_read_io_u32 (vm, vif->pci_dev_handle, i, &data);
vlib_cli_output (vm, "0x%lx", data);
}
}
static u8
virtio_pci_queue_size_valid (u16 qsz)
{
if (qsz < 64 || qsz > 4096)
return 0;
if ((qsz % 64) != 0)
return 0;
return 1;
}
clib_error_t *
virtio_pci_vring_init (vlib_main_t * vm, virtio_if_t * vif, u16 idx)
{
clib_error_t *error = 0;
u16 queue_size = 0;
virtio_vring_t *vring;
struct vring vr;
u32 i = 0;
void *ptr;
queue_size = virtio_pci_legacy_get_queue_num (vm, vif, idx);
if (!virtio_pci_queue_size_valid (queue_size))
clib_warning ("queue size is not valid");
if (!is_pow2 (queue_size))
return clib_error_return (0, "ring size must be power of 2");
if (queue_size > 32768)
return clib_error_return (0, "ring size must be 32768 or lower");
if (queue_size == 0)
queue_size = 256;
vec_validate_aligned (vif->vrings, idx, CLIB_CACHE_LINE_BYTES);
vring = vec_elt_at_index (vif->vrings, idx);
i = vring_size (queue_size, VIRTIO_PCI_VRING_ALIGN);
i = round_pow2 (i, VIRTIO_PCI_VRING_ALIGN);
ptr = vlib_physmem_alloc_aligned (vm, i, VIRTIO_PCI_VRING_ALIGN);
memset (ptr, 0, i);
vring_init (&vr, queue_size, ptr, VIRTIO_PCI_VRING_ALIGN);
vring->desc = vr.desc;
vring->avail = vr.avail;
vring->used = vr.used;
vring->queue_id = idx;
vring->avail->flags = VIRTIO_RING_FLAG_MASK_INT;
ASSERT (vring->buffers == 0);
vec_validate_aligned (vring->buffers, queue_size, CLIB_CACHE_LINE_BYTES);
ASSERT (vring->indirect_buffers == 0);
vec_validate_aligned (vring->indirect_buffers, queue_size,
CLIB_CACHE_LINE_BYTES);
if (idx % 2)
{
u32 n_alloc = 0;
do
{
if (n_alloc < queue_size)
n_alloc =
vlib_buffer_alloc (vm, vring->indirect_buffers + n_alloc,
queue_size - n_alloc);
}
while (n_alloc != queue_size);
vif->tx_ring_sz = queue_size;
}
else
vif->rx_ring_sz = queue_size;
vring->size = queue_size;
virtio_pci_legacy_setup_queue (vm, vif, idx, ptr);
vring->kick_fd = -1;
return error;
}
static void
virtio_negotiate_features (vlib_main_t * vm, virtio_if_t * vif,
u64 req_features)
{
/*
* if features are not requested
* default: all supported features
*/
u64 supported_features = VIRTIO_FEATURE (VIRTIO_NET_F_MTU)
| VIRTIO_FEATURE (VIRTIO_NET_F_MAC)
| VIRTIO_FEATURE (VIRTIO_NET_F_MRG_RXBUF)
| VIRTIO_FEATURE (VIRTIO_NET_F_STATUS)
| VIRTIO_FEATURE (VIRTIO_F_NOTIFY_ON_EMPTY)
| VIRTIO_FEATURE (VIRTIO_F_ANY_LAYOUT)
| VIRTIO_FEATURE (VIRTIO_RING_F_INDIRECT_DESC);
if (req_features == 0)
{
req_features = supported_features;
}
vif->features = req_features & vif->remote_features & supported_features;
if (vif->
remote_features & vif->features & VIRTIO_FEATURE (VIRTIO_NET_F_MTU))
{
virtio_net_config_t config;
virtio_pci_legacy_read_config (vm, vif, &config.mtu,
sizeof (config.mtu), 10);
if (config.mtu < 64)
vif->features &= ~VIRTIO_FEATURE (VIRTIO_NET_F_MTU);
}
vif->features = virtio_pci_legacy_set_features (vm, vif, vif->features);
}
void
virtio_pci_read_device_feature (vlib_main_t * vm, virtio_if_t * vif)
{
vif->remote_features = virtio_pci_legacy_get_features (vm, vif);
}
int
virtio_pci_reset_device (vlib_main_t * vm, virtio_if_t * vif)
{
u8 status = 0;
/*
* Reset the device
*/
status = virtio_pci_legacy_reset (vm, vif);
/*
* Set the Acknowledge status bit
*/
virtio_pci_legacy_set_status (vm, vif, VIRTIO_CONFIG_STATUS_ACK);
/*
* Set the Driver status bit
*/
virtio_pci_legacy_set_status (vm, vif, VIRTIO_CONFIG_STATUS_DRIVER);
/*
* Read the status and verify it
*/
status = virtio_pci_legacy_get_status (vm, vif);
if (!
((status & VIRTIO_CONFIG_STATUS_ACK)
&& (status & VIRTIO_CONFIG_STATUS_DRIVER)))
return -1;
vif->status = status;
return 0;
}
clib_error_t *
virtio_pci_read_caps (vlib_main_t * vm, virtio_if_t * vif)
{
clib_error_t *error = 0;
virtio_main_t *vim = &virtio_main;
struct virtio_pci_cap cap;
u8 pos, common_cfg = 0, notify_base = 0, dev_cfg = 0, isr = 0, pci_cfg = 0;
vlib_pci_dev_handle_t h = vif->pci_dev_handle;
if ((error = vlib_pci_read_config_u8 (vm, h, PCI_CAPABILITY_LIST, &pos)))
{
virtio_log_error (vim, vif, "error in reading capabilty list position");
clib_error_return (error, "error in reading capabilty list position");
}
while (pos)
{
if ((error =
vlib_pci_read_write_config (vm, h, VLIB_READ, pos, &cap,
sizeof (cap))))
{
virtio_log_error (vim, vif, "%s [%2x]",
"error in reading the capability at", pos);
clib_error_return (error,
"error in reading the capability at [%2x]", pos);
}
if (cap.cap_vndr == PCI_CAP_ID_MSIX)
{
u16 flags, table_size, table_size_mask = 0x07FF;
if ((error =
vlib_pci_read_write_config (vm, h, VLIB_READ, pos + 2, &flags,
sizeof (flags))))
clib_error_return (error,
"error in reading the capability at [%2x]",
pos + 2);
table_size = flags & table_size_mask;
virtio_log_debug (vim, vif, "flags:0x%x %s 0x%x", flags,
"msix interrupt vector table-size", table_size);
if (flags & PCI_MSIX_ENABLE)
{
virtio_log_debug (vim, vif, "msix interrupt enabled");
vif->msix_enabled = VIRTIO_MSIX_ENABLED;
}
else
{
virtio_log_debug (vim, vif, "msix interrupt disabled");
vif->msix_enabled = VIRTIO_MSIX_DISABLED;
}
}
if (cap.cap_vndr != PCI_CAP_ID_VNDR)
{
virtio_log_debug (vim, vif, "[%2x] %s %2x ", pos,
"skipping non VNDR cap id:", cap.cap_vndr);
goto next;
}
virtio_log_debug (vim, vif,
"[%4x] cfg type: %u, bar: %u, offset: %04x, len: %u",
pos, cap.cfg_type, cap.bar, cap.offset, cap.length);
switch (cap.cfg_type)
{
case VIRTIO_PCI_CAP_COMMON_CFG:
common_cfg = 1;
break;
case VIRTIO_PCI_CAP_NOTIFY_CFG:
notify_base = 1;
break;
case VIRTIO_PCI_CAP_DEVICE_CFG:
dev_cfg = 1;
break;
case VIRTIO_PCI_CAP_ISR_CFG:
isr = 1;
break;
case VIRTIO_PCI_CAP_PCI_CFG:
if (cap.bar == 0)
pci_cfg = 1;
break;
}
next:
pos = cap.cap_next;
}
if (common_cfg == 0 || notify_base == 0 || dev_cfg == 0 || isr == 0)
{
virtio_log_debug (vim, vif, "legacy virtio pci device found");
return error;
}
if (!pci_cfg)
clib_error_return (error, "modern virtio pci device found");
virtio_log_debug (vim, vif, "transitional virtio pci device found");
return error;
}
static clib_error_t *
virtio_pci_device_init (vlib_main_t * vm, virtio_if_t * vif,
virtio_pci_create_if_args_t * args)
{
clib_error_t *error = 0;
virtio_main_t *vim = &virtio_main;
u8 status = 0;
if ((error = virtio_pci_read_caps (vm, vif)))
clib_error_return (error, "Device not supported");
if (virtio_pci_reset_device (vm, vif) < 0)
{
virtio_log_error (vim, vif, "Failed to reset the device");
clib_error_return (error, "Failed to reset the device");
}
/*
* read device features and negotiate (user) requested features
*/
virtio_pci_read_device_feature (vm, vif);
virtio_negotiate_features (vm, vif, args->features);
/*
* After FEATURE_OK, driver should not accept new feature bits
*/
virtio_pci_legacy_set_status (vm, vif, VIRTIO_CONFIG_STATUS_FEATURES_OK);
status = virtio_pci_legacy_get_status (vm, vif);
if (!(status & VIRTIO_CONFIG_STATUS_FEATURES_OK))
{
virtio_log_error (vim, vif,
"error encountered: Device doesn't support requested features");
clib_error_return (error, "Device doesn't support requested features");
}
vif->status = status;
if (virtio_pci_get_mac (vm, vif))
{
f64 now = vlib_time_now (vm);
u32 rnd;
rnd = (u32) (now * 1e6);
rnd = random_u32 (&rnd);
memcpy (vif->mac_addr + 2, &rnd, sizeof (rnd));
vif->mac_addr[0] = 2;
vif->mac_addr[1] = 0xfe;
virtio_pci_set_mac (vm, vif);
}
virtio_set_net_hdr_size (vif);
if ((error = virtio_pci_get_max_virtqueue_pairs (vm, vif)))
goto error;
if ((error = virtio_pci_vring_init (vm, vif, 0)))
goto error;
if ((error = virtio_pci_vring_init (vm, vif, 1)))
goto error;
if (vif->msix_enabled == VIRTIO_MSIX_ENABLED)
{
if (virtio_pci_legacy_set_config_irq (vm, vif, 1) ==
VIRTIO_MSI_NO_VECTOR)
virtio_log_warning (vim, vif, "config vector 1 is not set");
if (virtio_pci_legacy_set_queue_irq (vm, vif, 0, 0) ==
VIRTIO_MSI_NO_VECTOR)
virtio_log_warning (vim, vif, "queue vector 0 is not set");
}
virtio_pci_legacy_set_status (vm, vif, VIRTIO_CONFIG_STATUS_DRIVER_OK);
vif->status = virtio_pci_legacy_get_status (vm, vif);
error:
return error;
}
void
virtio_pci_create_if (vlib_main_t * vm, virtio_pci_create_if_args_t * args)
{
vnet_main_t *vnm = vnet_get_main ();
virtio_main_t *vim = &virtio_main;
virtio_if_t *vif;
vlib_pci_dev_handle_t h;
clib_error_t *error = 0;
if (args->rxq_size == 0)
args->rxq_size = VIRTIO_NUM_RX_DESC;
if (args->txq_size == 0)
args->txq_size = VIRTIO_NUM_TX_DESC;
if (!virtio_pci_queue_size_valid (args->rxq_size) ||
!virtio_pci_queue_size_valid (args->txq_size))
{
args->rv = VNET_API_ERROR_INVALID_VALUE;
args->error =
clib_error_return (error,
"queue size must be <= 4096, >= 64, "
"and multiples of 64");
vlib_log (VLIB_LOG_LEVEL_ERR, vim->log_default, "%U: %s",
format_vlib_pci_addr, &args->addr,
"queue size must be <= 4096, >= 64, and multiples of 64");
return;
}
/* *INDENT-OFF* */
pool_foreach (vif, vim->interfaces, ({
if (vif->pci_addr.as_u32 == args->addr)
{
args->rv = VNET_API_ERROR_INVALID_VALUE;
args->error =
clib_error_return (error, "PCI address in use");
vlib_log (VLIB_LOG_LEVEL_ERR, vim->log_default, "%U: %s",
format_vlib_pci_addr, &args->addr,
" PCI address in use");
return;
}
}));
/* *INDENT-ON* */
pool_get (vim->interfaces, vif);
vif->dev_instance = vif - vim->interfaces;
vif->per_interface_next_index = ~0;
vif->pci_addr.as_u32 = args->addr;
if ((error =
vlib_pci_device_open (vm, (vlib_pci_addr_t *) & vif->pci_addr,
virtio_pci_device_ids, &h)))
{
pool_put (vim->interfaces, vif);
args->rv = VNET_API_ERROR_INVALID_INTERFACE;
args->error =
clib_error_return (error, "pci-addr %U", format_vlib_pci_addr,
&vif->pci_addr);
vlib_log (VLIB_LOG_LEVEL_ERR, vim->log_default, "%U: %s",
format_vlib_pci_addr, &vif->pci_addr,
"error encountered on pci device open");
return;
}
vif->pci_dev_handle = h;
vlib_pci_set_private_data (vm, h, vif->dev_instance);
if ((error = vlib_pci_bus_master_enable (vm, h)))
{
virtio_log_error (vim, vif,
"error encountered on pci bus master enable");
goto error;
}
if ((error = vlib_pci_io_region (vm, h, 0)))
{
virtio_log_error (vim, vif, "error encountered on pci io region");
goto error;
}
if (vlib_pci_get_num_msix_interrupts (vm, h) > 1)
{
if ((error = vlib_pci_register_msix_handler (vm, h, 0, 1,
&virtio_pci_irq_0_handler)))
{
virtio_log_error (vim, vif,
"error encountered on pci register msix handler 0");
goto error;
}
if ((error = vlib_pci_register_msix_handler (vm, h, 1, 1,
&virtio_pci_irq_1_handler)))
{
virtio_log_error (vim, vif,
"error encountered on pci register msix handler 1");
goto error;
}
if ((error = vlib_pci_enable_msix_irq (vm, h, 0, 2)))
{
virtio_log_error (vim, vif,
"error encountered on pci enable msix irq");
goto error;
}
vif->support_int_mode = 1;
virtio_log_debug (vim, vif, "device supports msix interrupts");
}
else if (vlib_pci_get_num_msix_interrupts (vm, h) == 1)
{
/*
* if msix table-size is 1, fall back to intX.
*/
if ((error =
vlib_pci_register_intx_handler (vm, h, &virtio_pci_irq_handler)))
{
virtio_log_error (vim, vif,
"error encountered on pci register interrupt handler");
goto error;
}
vif->support_int_mode = 1;
virtio_log_debug (vim, vif, "pci register interrupt handler");
}
else
{
/*
* WARN: intX is showing some weird behaviour.
* Please don't use interrupt mode with UIO driver.
*/
vif->support_int_mode = 0;
virtio_log_debug (vim, vif, "driver is configured in poll mode only");
}
if ((error = vlib_pci_intr_enable (vm, h)))
{
virtio_log_error (vim, vif,
"error encountered on pci interrupt enable");
goto error;
}
if ((error = virtio_pci_device_init (vm, vif, args)))
{
virtio_log_error (vim, vif, "error encountered on device init");
goto error;
}
vif->type = VIRTIO_IF_TYPE_PCI;
/* create interface */
error = ethernet_register_interface (vnm, virtio_device_class.index,
vif->dev_instance, vif->mac_addr,
&vif->hw_if_index,
virtio_pci_flag_change);
if (error)
{
virtio_log_error (vim, vif,
"error encountered on ethernet register interface");
goto error;
}
vnet_sw_interface_t *sw = vnet_get_hw_sw_interface (vnm, vif->hw_if_index);
vif->sw_if_index = sw->sw_if_index;
args->sw_if_index = sw->sw_if_index;
vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, vif->hw_if_index);
hw->flags |= VNET_HW_INTERFACE_FLAG_SUPPORTS_INT_MODE;
vnet_hw_interface_set_input_node (vnm, vif->hw_if_index,
virtio_input_node.index);
vnet_hw_interface_assign_rx_thread (vnm, vif->hw_if_index, 0, ~0);
virtio_vring_set_numa_node (vm, vif, 0);
vnet_hw_interface_set_rx_mode (vnm, vif->hw_if_index, 0,
VNET_HW_INTERFACE_RX_MODE_POLLING);
if (virtio_pci_is_link_up (vm, vif) & VIRTIO_NET_S_LINK_UP)
{
vif->flags |= VIRTIO_IF_FLAG_ADMIN_UP;
vnet_hw_interface_set_flags (vnm, vif->hw_if_index,
VNET_HW_INTERFACE_FLAG_LINK_UP);
}
else
vnet_hw_interface_set_flags (vnm, vif->hw_if_index, 0);
return;
error:
virtio_pci_delete_if (vm, vif);
args->rv = VNET_API_ERROR_INVALID_INTERFACE;
args->error = error;
}
int
virtio_pci_delete_if (vlib_main_t * vm, virtio_if_t * vif)
{
vnet_main_t *vnm = vnet_get_main ();
virtio_main_t *vim = &virtio_main;
u32 i = 0;
if (vif->type != VIRTIO_IF_TYPE_PCI)
return VNET_API_ERROR_INVALID_INTERFACE;
vlib_pci_intr_disable (vm, vif->pci_dev_handle);
virtio_pci_legacy_del_queue (vm, vif, 0);
virtio_pci_legacy_del_queue (vm, vif, 1);
virtio_pci_legacy_reset (vm, vif);
if (vif->hw_if_index)
{
vnet_hw_interface_set_flags (vnm, vif->hw_if_index, 0);
vnet_hw_interface_unassign_rx_thread (vnm, vif->hw_if_index, 0);
ethernet_delete_interface (vnm, vif->hw_if_index);
}
vlib_pci_device_close (vm, vif->pci_dev_handle);
vec_foreach_index (i, vif->vrings)
{
virtio_vring_t *vring = vec_elt_at_index (vif->vrings, i);
if (vring->kick_fd != -1)
close (vring->kick_fd);
if (vring->used)
{
if ((i & 1) == 1)
virtio_free_used_desc (vm, vring);
else
virtio_free_rx_buffers (vm, vring);
}
if (vring->queue_id % 2)
{
vlib_buffer_free_no_next (vm, vring->indirect_buffers, vring->size);
}
vec_free (vring->buffers);
vec_free (vring->indirect_buffers);
vlib_physmem_free (vm, vring->desc);
}
vec_free (vif->vrings);
if (vif->fd != -1)
vif->fd = -1;
if (vif->tap_fd != -1)
vif->tap_fd = -1;
clib_error_free (vif->error);
memset (vif, 0, sizeof (*vif));
pool_put (vim->interfaces, vif);
return 0;
}
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/