blob: bbca81c2d02d80802886cc2bdf8f51fd0a9f09d5 [file] [log] [blame]
/*
*------------------------------------------------------------------
* Copyright (c) 2017 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 <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <net/if.h>
#include <linux/if_tun.h>
#include <sys/ioctl.h>
#include <sys/eventfd.h>
#include <vlib/vlib.h>
#include <vlib/pci/pci.h>
#include <vlib/unix/unix.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/virtio_inline.h>
#include <vnet/devices/virtio/pci.h>
#include <vnet/interface/rx_queue_funcs.h>
#include <vnet/interface/tx_queue_funcs.h>
virtio_main_t virtio_main;
#define _IOCTL(fd,a,...) \
if (ioctl (fd, a, __VA_ARGS__) < 0) \
{ \
err = clib_error_return_unix (0, "ioctl(" #a ")"); \
goto error; \
}
static clib_error_t *
call_read_ready (clib_file_t * uf)
{
vnet_main_t *vnm = vnet_get_main ();
u64 b;
CLIB_UNUSED (ssize_t size) = read (uf->file_descriptor, &b, sizeof (b));
vnet_hw_if_rx_queue_set_int_pending (vnm, uf->private_data);
return 0;
}
clib_error_t *
virtio_vring_init (vlib_main_t * vm, virtio_if_t * vif, u16 idx, u16 sz)
{
virtio_vring_t *vring;
int i;
if (!is_pow2 (sz))
return clib_error_return (0, "ring size must be power of 2");
if (sz > 32768)
return clib_error_return (0, "ring size must be 32768 or lower");
if (sz == 0)
sz = 256;
if (idx % 2)
{
vec_validate_aligned (vif->txq_vrings, TX_QUEUE_ACCESS (idx),
CLIB_CACHE_LINE_BYTES);
vring = vec_elt_at_index (vif->txq_vrings, TX_QUEUE_ACCESS (idx));
clib_spinlock_init (&vring->lockp);
}
else
{
vec_validate_aligned (vif->rxq_vrings, RX_QUEUE_ACCESS (idx),
CLIB_CACHE_LINE_BYTES);
vring = vec_elt_at_index (vif->rxq_vrings, RX_QUEUE_ACCESS (idx));
}
i = sizeof (vring_desc_t) * sz;
i = round_pow2 (i, CLIB_CACHE_LINE_BYTES);
vring->desc = clib_mem_alloc_aligned (i, CLIB_CACHE_LINE_BYTES);
clib_memset (vring->desc, 0, i);
i = sizeof (vring_avail_t) + sz * sizeof (vring->avail->ring[0]);
i = round_pow2 (i, CLIB_CACHE_LINE_BYTES);
vring->avail = clib_mem_alloc_aligned (i, CLIB_CACHE_LINE_BYTES);
clib_memset (vring->avail, 0, i);
// tell kernel that we don't need interrupt
vring->avail->flags = VRING_AVAIL_F_NO_INTERRUPT;
i = sizeof (vring_used_t) + sz * sizeof (vring_used_elem_t);
i = round_pow2 (i, CLIB_CACHE_LINE_BYTES);
vring->used = clib_mem_alloc_aligned (i, CLIB_CACHE_LINE_BYTES);
clib_memset (vring->used, 0, i);
vring->queue_id = idx;
ASSERT (vring->buffers == 0);
vec_validate_aligned (vring->buffers, sz, CLIB_CACHE_LINE_BYTES);
if (idx & 1)
{
clib_memset_u32 (vring->buffers, ~0, sz);
// tx path: suppress the interrupts from kernel
vring->call_fd = -1;
}
else
vring->call_fd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
vring->size = sz;
vring->kick_fd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
virtio_log_debug (vif, "vring %u size %u call_fd %d kick_fd %d", idx,
vring->size, vring->call_fd, vring->kick_fd);
return 0;
}
inline void
virtio_free_buffers (vlib_main_t * vm, virtio_vring_t * vring)
{
u16 used = vring->desc_in_use;
u16 last = vring->last_used_idx;
u16 mask = vring->size - 1;
while (used)
{
vlib_buffer_free (vm, &vring->buffers[last & mask], 1);
last++;
used--;
}
}
clib_error_t *
virtio_vring_free_rx (vlib_main_t * vm, virtio_if_t * vif, u32 idx)
{
virtio_vring_t *vring =
vec_elt_at_index (vif->rxq_vrings, RX_QUEUE_ACCESS (idx));
clib_file_del_by_index (&file_main, vring->call_file_index);
close (vring->kick_fd);
close (vring->call_fd);
if (vring->used)
{
virtio_free_buffers (vm, vring);
clib_mem_free (vring->used);
}
if (vring->desc)
clib_mem_free (vring->desc);
if (vring->avail)
clib_mem_free (vring->avail);
vec_free (vring->buffers);
return 0;
}
clib_error_t *
virtio_vring_free_tx (vlib_main_t * vm, virtio_if_t * vif, u32 idx)
{
virtio_vring_t *vring =
vec_elt_at_index (vif->txq_vrings, TX_QUEUE_ACCESS (idx));
close (vring->kick_fd);
if (vring->used)
{
virtio_free_buffers (vm, vring);
clib_mem_free (vring->used);
}
if (vring->desc)
clib_mem_free (vring->desc);
if (vring->avail)
clib_mem_free (vring->avail);
vec_free (vring->buffers);
gro_flow_table_free (vring->flow_table);
virtio_vring_buffering_free (vm, vring->buffering);
clib_spinlock_free (&vring->lockp);
return 0;
}
void
virtio_set_packet_coalesce (virtio_if_t * vif)
{
vnet_main_t *vnm = vnet_get_main ();
vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, vif->hw_if_index);
virtio_vring_t *vring;
vif->packet_coalesce = 1;
vec_foreach (vring, vif->txq_vrings)
{
gro_flow_table_init (&vring->flow_table,
vif->type & (VIRTIO_IF_TYPE_TAP |
VIRTIO_IF_TYPE_PCI), hw->tx_node_index);
}
}
clib_error_t *
virtio_set_packet_buffering (virtio_if_t * vif, u16 buffering_size)
{
vnet_main_t *vnm = vnet_get_main ();
vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, vif->hw_if_index);
virtio_vring_t *vring;
clib_error_t *error = 0;
vif->packet_buffering = 1;
vec_foreach (vring, vif->txq_vrings)
{
if ((error =
virtio_vring_buffering_init (&vring->buffering, hw->tx_node_index,
buffering_size)))
{
break;
}
}
return error;
}
static void
virtio_vring_fill (vlib_main_t *vm, virtio_if_t *vif, virtio_vring_t *vring)
{
if (vif->is_packed)
virtio_refill_vring_packed (vm, vif, vif->type, vring,
vif->virtio_net_hdr_sz,
virtio_input_node.index);
else
virtio_refill_vring_split (vm, vif, vif->type, vring,
vif->virtio_net_hdr_sz,
virtio_input_node.index);
}
void
virtio_vring_set_rx_queues (vlib_main_t *vm, virtio_if_t *vif)
{
vnet_main_t *vnm = vnet_get_main ();
virtio_vring_t *vring;
u32 i = 0;
vnet_hw_if_set_input_node (vnm, vif->hw_if_index, virtio_input_node.index);
vec_foreach (vring, vif->rxq_vrings)
{
vring->queue_index = vnet_hw_if_register_rx_queue (
vnm, vif->hw_if_index, RX_QUEUE_ACCESS (vring->queue_id),
VNET_HW_IF_RXQ_THREAD_ANY);
vring->buffer_pool_index = vlib_buffer_pool_get_default_for_numa (
vm, vnet_hw_if_get_rx_queue_numa_node (vnm, vring->queue_index));
if (vif->type == VIRTIO_IF_TYPE_TAP || vif->type == VIRTIO_IF_TYPE_TUN)
{
clib_file_t f = {
.read_function = call_read_ready,
.flags = UNIX_FILE_EVENT_EDGE_TRIGGERED,
.file_descriptor = vring->call_fd,
.private_data = vring->queue_index,
.description = format (0, "%U vring %u", format_virtio_device_name,
vif->dev_instance, vring->queue_id),
};
vring->call_file_index = clib_file_add (&file_main, &f);
vnet_hw_if_set_rx_queue_file_index (vnm, vring->queue_index,
vring->call_file_index);
}
else if ((vif->type == VIRTIO_IF_TYPE_PCI) && (vif->support_int_mode) &&
(vif->msix_enabled == VIRTIO_MSIX_ENABLED))
{
u32 file_index;
file_index =
vlib_pci_get_msix_file_index (vm, vif->pci_dev_handle, i + 1);
vnet_hw_if_set_rx_queue_file_index (vnm, vring->queue_index,
file_index);
i++;
}
vnet_hw_if_set_rx_queue_mode (vnm, vring->queue_index,
VNET_HW_IF_RX_MODE_POLLING);
vring->mode = VNET_HW_IF_RX_MODE_POLLING;
virtio_vring_fill (vm, vif, vring);
}
vnet_hw_if_update_runtime_data (vnm, vif->hw_if_index);
}
void
virtio_vring_set_tx_queues (vlib_main_t *vm, virtio_if_t *vif)
{
vnet_main_t *vnm = vnet_get_main ();
virtio_vring_t *vring;
vec_foreach (vring, vif->txq_vrings)
{
vring->queue_index = vnet_hw_if_register_tx_queue (
vnm, vif->hw_if_index, TX_QUEUE_ACCESS (vring->queue_id));
}
if (vif->num_txqs == 0)
{
virtio_log_error (vif, "Interface %U has 0 txq",
format_vnet_hw_if_index_name, vnm, vif->hw_if_index);
return;
}
for (u32 j = 0; j < vlib_get_n_threads (); j++)
{
u32 qi = vif->txq_vrings[j % vif->num_txqs].queue_index;
vnet_hw_if_tx_queue_assign_thread (vnm, qi, j);
}
vnet_hw_if_update_runtime_data (vnm, vif->hw_if_index);
}
inline void
virtio_set_net_hdr_size (virtio_if_t * vif)
{
if (vif->features & VIRTIO_FEATURE (VIRTIO_NET_F_MRG_RXBUF) ||
vif->features & VIRTIO_FEATURE (VIRTIO_F_VERSION_1))
vif->virtio_net_hdr_sz = sizeof (virtio_net_hdr_v1_t);
else
vif->virtio_net_hdr_sz = sizeof (virtio_net_hdr_t);
}
inline void
virtio_show (vlib_main_t *vm, u32 *hw_if_indices, u8 show_descr,
virtio_if_type_t type)
{
u32 i, j, hw_if_index;
virtio_if_t *vif;
vnet_main_t *vnm = &vnet_main;
virtio_main_t *mm = &virtio_main;
virtio_vring_t *vring;
struct feat_struct
{
u8 bit;
char *str;
};
struct feat_struct *feat_entry;
static struct feat_struct feat_array[] = {
#define _(s,b) { .str = #s, .bit = b, },
foreach_virtio_net_features
#undef _
{.str = NULL}
};
struct feat_struct *flag_entry;
static struct feat_struct flags_array[] = {
#define _(b,e,s) { .bit = b, .str = s, },
foreach_virtio_if_flag
#undef _
{.str = NULL}
};
if (!hw_if_indices)
return;
for (hw_if_index = 0; hw_if_index < vec_len (hw_if_indices); hw_if_index++)
{
vnet_hw_interface_t *hi =
vnet_get_hw_interface (vnm, hw_if_indices[hw_if_index]);
vif = pool_elt_at_index (mm->interfaces, hi->dev_instance);
if (vif->type != type)
continue;
vlib_cli_output (vm, "Interface: %U (ifindex %d)",
format_vnet_hw_if_index_name, vnm,
hw_if_indices[hw_if_index], vif->hw_if_index);
if (type == VIRTIO_IF_TYPE_PCI)
{
vlib_cli_output (vm, " PCI Address: %U", format_vlib_pci_addr,
&vif->pci_addr);
}
if (type & (VIRTIO_IF_TYPE_TAP | VIRTIO_IF_TYPE_TUN))
{
u8 *str = 0;
if (vif->host_if_name)
vlib_cli_output (vm, " name \"%s\"", vif->host_if_name);
if (vif->net_ns)
vlib_cli_output (vm, " host-ns \"%s\"", vif->net_ns);
if (vif->host_mtu_size)
vlib_cli_output (vm, " host-mtu-size \"%d\"",
vif->host_mtu_size);
if (type == VIRTIO_IF_TYPE_TAP)
vlib_cli_output (vm, " host-mac-addr: %U",
format_ethernet_address, vif->host_mac_addr);
vlib_cli_output (vm, " host-carrier-up: %u", vif->host_carrier_up);
vec_foreach_index (i, vif->vhost_fds)
str = format (str, " %d", vif->vhost_fds[i]);
vlib_cli_output (vm, " vhost-fds%v", str);
vec_free (str);
vec_foreach_index (i, vif->tap_fds)
str = format (str, " %d", vif->tap_fds[i]);
vlib_cli_output (vm, " tap-fds%v", str);
vec_free (str);
}
vlib_cli_output (vm, " gso-enabled %d", vif->gso_enabled);
vlib_cli_output (vm, " csum-enabled %d", vif->csum_offload_enabled);
vlib_cli_output (vm, " packet-coalesce %d", vif->packet_coalesce);
vlib_cli_output (vm, " packet-buffering %d", vif->packet_buffering);
if (type & (VIRTIO_IF_TYPE_TAP | VIRTIO_IF_TYPE_PCI))
vlib_cli_output (vm, " Mac Address: %U", format_ethernet_address,
vif->mac_addr);
vlib_cli_output (vm, " Device instance: %u", vif->dev_instance);
vlib_cli_output (vm, " flags 0x%x", vif->flags);
flag_entry = (struct feat_struct *) &flags_array;
while (flag_entry->str)
{
if (vif->flags & (1ULL << flag_entry->bit))
vlib_cli_output (vm, " %s (%d)", flag_entry->str,
flag_entry->bit);
flag_entry++;
}
if (type == VIRTIO_IF_TYPE_PCI)
{
device_status (vm, vif);
}
vlib_cli_output (vm, " features 0x%lx", vif->features);
feat_entry = (struct feat_struct *) &feat_array;
while (feat_entry->str)
{
if (vif->features & (1ULL << feat_entry->bit))
vlib_cli_output (vm, " %s (%d)", feat_entry->str,
feat_entry->bit);
feat_entry++;
}
vlib_cli_output (vm, " remote-features 0x%lx", vif->remote_features);
feat_entry = (struct feat_struct *) &feat_array;
while (feat_entry->str)
{
if (vif->remote_features & (1ULL << feat_entry->bit))
vlib_cli_output (vm, " %s (%d)", feat_entry->str,
feat_entry->bit);
feat_entry++;
}
vlib_cli_output (vm, " Number of RX Virtqueue %u", vif->num_rxqs);
vlib_cli_output (vm, " Number of TX Virtqueue %u", vif->num_txqs);
if (type == VIRTIO_IF_TYPE_PCI && vif->cxq_vring != NULL &&
vif->features & VIRTIO_FEATURE (VIRTIO_NET_F_CTRL_VQ))
vlib_cli_output (vm, " Number of CTRL Virtqueue 1");
vec_foreach_index (i, vif->rxq_vrings)
{
vring = vec_elt_at_index (vif->rxq_vrings, i);
vlib_cli_output (vm, " Virtqueue (RX) %d", vring->queue_id);
vlib_cli_output (vm,
" qsz %d, last_used_idx %d, desc_next %d, desc_in_use %d",
vring->size, vring->last_used_idx, vring->desc_next,
vring->desc_in_use);
if (vif->is_packed)
{
vlib_cli_output (vm,
" driver_event.flags 0x%x driver_event.off_wrap %d device_event.flags 0x%x device_event.off_wrap %d",
vring->driver_event->flags,
vring->driver_event->off_wrap,
vring->device_event->flags,
vring->device_event->off_wrap);
vlib_cli_output (vm,
" avail wrap counter %d, used wrap counter %d",
vring->avail_wrap_counter,
vring->used_wrap_counter);
}
else
vlib_cli_output (vm,
" avail.flags 0x%x avail.idx %d used.flags 0x%x used.idx %d",
vring->avail->flags, vring->avail->idx,
vring->used->flags, vring->used->idx);
if (type & (VIRTIO_IF_TYPE_TAP | VIRTIO_IF_TYPE_TUN))
{
vlib_cli_output (vm, " kickfd %d, callfd %d", vring->kick_fd,
vring->call_fd);
}
if (show_descr)
{
vlib_cli_output (vm, "\n descriptor table:\n");
vlib_cli_output (vm,
" id addr len flags next/id user_addr\n");
vlib_cli_output (vm,
" ===== ================== ===== ====== ======= ==================\n");
for (j = 0; j < vring->size; j++)
{
if (vif->is_packed)
{
vring_packed_desc_t *desc = &vring->packed_desc[j];
vlib_cli_output (vm,
" %-5d 0x%016lx %-5d 0x%04x %-8d 0x%016lx\n",
j, desc->addr,
desc->len,
desc->flags, desc->id, desc->addr);
}
else
{
vring_desc_t *desc = &vring->desc[j];
vlib_cli_output (vm,
" %-5d 0x%016lx %-5d 0x%04x %-8d 0x%016lx\n",
j, desc->addr,
desc->len,
desc->flags, desc->next, desc->addr);
}
}
}
}
vec_foreach_index (i, vif->txq_vrings)
{
vring = vec_elt_at_index (vif->txq_vrings, i);
vlib_cli_output (vm, " Virtqueue (TX) %d", vring->queue_id);
vlib_cli_output (vm,
" qsz %d, last_used_idx %d, desc_next %d, desc_in_use %d",
vring->size, vring->last_used_idx, vring->desc_next,
vring->desc_in_use);
if (vif->is_packed)
{
vlib_cli_output (vm,
" driver_event.flags 0x%x driver_event.off_wrap %d device_event.flags 0x%x device_event.off_wrap %d",
vring->driver_event->flags,
vring->driver_event->off_wrap,
vring->device_event->flags,
vring->device_event->off_wrap);
vlib_cli_output (vm,
" avail wrap counter %d, used wrap counter %d",
vring->avail_wrap_counter,
vring->used_wrap_counter);
}
else
vlib_cli_output (vm,
" avail.flags 0x%x avail.idx %d used.flags 0x%x used.idx %d",
vring->avail->flags, vring->avail->idx,
vring->used->flags, vring->used->idx);
if (type & (VIRTIO_IF_TYPE_TAP | VIRTIO_IF_TYPE_TUN))
{
vlib_cli_output (vm, " kickfd %d, callfd %d", vring->kick_fd,
vring->call_fd);
}
if (vring->flow_table)
{
vlib_cli_output (vm, " %U", gro_flow_table_format,
vring->flow_table);
}
if (vif->packet_buffering)
{
vlib_cli_output (vm, " %U", virtio_vring_buffering_format,
vring->buffering);
}
if (show_descr)
{
vlib_cli_output (vm, "\n descriptor table:\n");
vlib_cli_output (vm,
" id addr len flags next/id user_addr\n");
vlib_cli_output (vm,
" ===== ================== ===== ====== ======== ==================\n");
for (j = 0; j < vring->size; j++)
{
if (vif->is_packed)
{
vring_packed_desc_t *desc = &vring->packed_desc[j];
vlib_cli_output (vm,
" %-5d 0x%016lx %-5d 0x%04x %-8d 0x%016lx\n",
j, desc->addr,
desc->len,
desc->flags, desc->id, desc->addr);
}
else
{
vring_desc_t *desc = &vring->desc[j];
vlib_cli_output (vm,
" %-5d 0x%016lx %-5d 0x%04x %-8d 0x%016lx\n",
j, desc->addr,
desc->len,
desc->flags, desc->next, desc->addr);
}
}
}
}
if (type == VIRTIO_IF_TYPE_PCI && vif->cxq_vring != NULL &&
vif->features & VIRTIO_FEATURE (VIRTIO_NET_F_CTRL_VQ))
{
vring = vif->cxq_vring;
vlib_cli_output (vm, " Virtqueue (CTRL) %d", vring->queue_id);
vlib_cli_output (vm,
" qsz %d, last_used_idx %d, desc_next %d, desc_in_use %d",
vring->size, vring->last_used_idx,
vring->desc_next, vring->desc_in_use);
if (vif->is_packed)
{
vlib_cli_output (vm,
" driver_event.flags 0x%x driver_event.off_wrap %d device_event.flags 0x%x device_event.off_wrap %d",
vring->driver_event->flags,
vring->driver_event->off_wrap,
vring->device_event->flags,
vring->device_event->off_wrap);
vlib_cli_output (vm,
" avail wrap counter %d, used wrap counter %d",
vring->avail_wrap_counter,
vring->used_wrap_counter);
}
else
{
vlib_cli_output (vm,
" avail.flags 0x%x avail.idx %d used.flags 0x%x used.idx %d",
vring->avail->flags, vring->avail->idx,
vring->used->flags, vring->used->idx);
}
if (show_descr)
{
vlib_cli_output (vm, "\n descriptor table:\n");
vlib_cli_output (vm,
" id addr len flags next/id user_addr\n");
vlib_cli_output (vm,
" ===== ================== ===== ====== ======== ==================\n");
for (j = 0; j < vring->size; j++)
{
if (vif->is_packed)
{
vring_packed_desc_t *desc = &vring->packed_desc[j];
vlib_cli_output (vm,
" %-5d 0x%016lx %-5d 0x%04x %-8d 0x%016lx\n",
j, desc->addr,
desc->len,
desc->flags, desc->id, desc->addr);
}
else
{
vring_desc_t *desc = &vring->desc[j];
vlib_cli_output (vm,
" %-5d 0x%016lx %-5d 0x%04x %-8d 0x%016lx\n",
j, desc->addr,
desc->len,
desc->flags, desc->next, desc->addr);
}
}
}
}
}
}
static clib_error_t *
virtio_init (vlib_main_t * vm)
{
virtio_main_t *vim = &virtio_main;
clib_error_t *error = 0;
vim->log_default = vlib_log_register_class ("virtio", 0);
vlib_log_debug (vim->log_default, "initialized");
return error;
}
VLIB_INIT_FUNCTION (virtio_init);
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/