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-rw-r--r--src/vnet/devices/virtio/FEATURE.yaml2
-rw-r--r--src/vnet/devices/virtio/cli.c6
-rw-r--r--src/vnet/devices/virtio/pci.c24
-rw-r--r--src/vnet/devices/virtio/pci.h1
-rw-r--r--src/vnet/devices/virtio/virtio_pci_modern.c4
5 files changed, 27 insertions, 10 deletions
diff --git a/src/vnet/devices/virtio/FEATURE.yaml b/src/vnet/devices/virtio/FEATURE.yaml
index 5f4de207acd..446a45b61a3 100644
--- a/src/vnet/devices/virtio/FEATURE.yaml
+++ b/src/vnet/devices/virtio/FEATURE.yaml
@@ -11,6 +11,8 @@ features:
- Support multi-queue, GSO, checksum offload, indirect descriptor,
jumbo frame, and packed ring.
- Support virtio 1.1 packed ring in vhost
+ - Support for tx queue size configuration (tested on host kernel 5.15
+ and qemu version 6.2.0)
description: "Virtio implementation"
missing:
- API dump filtering by sw_if_index
diff --git a/src/vnet/devices/virtio/cli.c b/src/vnet/devices/virtio/cli.c
index 2457e9b686e..cadfd67df41 100644
--- a/src/vnet/devices/virtio/cli.c
+++ b/src/vnet/devices/virtio/cli.c
@@ -31,6 +31,7 @@ virtio_pci_create_command_fn (vlib_main_t * vm, unformat_input_t * input,
virtio_pci_create_if_args_t args;
u64 feature_mask = (u64) ~ (0ULL);
u32 buffering_size = 0;
+ u32 txq_size = 0;
/* Get a line of input. */
if (!unformat_user (input, unformat_line_input, line_input))
@@ -43,6 +44,8 @@ virtio_pci_create_command_fn (vlib_main_t * vm, unformat_input_t * input,
;
else if (unformat (line_input, "feature-mask 0x%llx", &feature_mask))
args.features = feature_mask;
+ if (unformat (line_input, "tx-queue-size %u", &txq_size))
+ args.tx_queue_size = txq_size;
else if (unformat (line_input, "gso-enabled"))
args.gso_enabled = 1;
else if (unformat (line_input, "csum-enabled"))
@@ -74,7 +77,8 @@ virtio_pci_create_command_fn (vlib_main_t * vm, unformat_input_t * input,
VLIB_CLI_COMMAND (virtio_pci_create_command, static) = {
.path = "create interface virtio",
.short_help = "create interface virtio <pci-address> "
- "[feature-mask <hex-mask>] [gso-enabled] [csum-enabled] "
+ "[feature-mask <hex-mask>] [tx-queue-size <size>] "
+ "[gso-enabled] [csum-enabled] "
"[buffering [size <buffering-szie>]] [packed] [bind [force]]",
.function = virtio_pci_create_command_fn,
};
diff --git a/src/vnet/devices/virtio/pci.c b/src/vnet/devices/virtio/pci.c
index 85e6abdbbe5..0820f8a5016 100644
--- a/src/vnet/devices/virtio/pci.c
+++ b/src/vnet/devices/virtio/pci.c
@@ -721,8 +721,8 @@ virtio_pci_control_vring_init (vlib_main_t * vm, virtio_if_t * vif,
}
clib_error_t *
-virtio_pci_vring_split_init (vlib_main_t * vm, virtio_if_t * vif,
- u16 queue_num)
+virtio_pci_vring_split_init (vlib_main_t *vm, virtio_if_t *vif, u16 queue_num,
+ u16 txq_size)
{
clib_error_t *error = 0;
u16 queue_size = 0;
@@ -745,6 +745,16 @@ virtio_pci_vring_split_init (vlib_main_t * vm, virtio_if_t * vif,
if (queue_num % 2)
{
+ if (txq_size)
+ {
+ virtio_log_debug (vif, "tx-queue: number %u, default-size %u",
+ queue_num, queue_size);
+ vif->virtio_pci_func->set_queue_size (vm, vif, queue_num, txq_size);
+ queue_size =
+ vif->virtio_pci_func->get_queue_size (vm, vif, queue_num);
+ virtio_log_debug (vif, "tx-queue: number %u, new size %u", queue_num,
+ queue_size);
+ }
vec_validate_aligned (vif->txq_vrings, TX_QUEUE_ACCESS (queue_num),
CLIB_CACHE_LINE_BYTES);
vring = vec_elt_at_index (vif->txq_vrings, TX_QUEUE_ACCESS (queue_num));
@@ -886,12 +896,13 @@ virtio_pci_vring_packed_init (vlib_main_t * vm, virtio_if_t * vif,
}
clib_error_t *
-virtio_pci_vring_init (vlib_main_t * vm, virtio_if_t * vif, u16 queue_num)
+virtio_pci_vring_init (vlib_main_t *vm, virtio_if_t *vif, u16 queue_num,
+ u16 txq_size)
{
if (vif->is_packed)
return virtio_pci_vring_packed_init (vm, vif, queue_num);
else
- return virtio_pci_vring_split_init (vm, vif, queue_num);
+ return virtio_pci_vring_split_init (vm, vif, queue_num, txq_size);
}
static void
@@ -1229,7 +1240,7 @@ virtio_pci_device_init (vlib_main_t * vm, virtio_if_t * vif,
for (int i = 0; i < vif->max_queue_pairs; i++)
{
- if ((error = virtio_pci_vring_init (vm, vif, RX_QUEUE (i))))
+ if ((error = virtio_pci_vring_init (vm, vif, RX_QUEUE (i), 0)))
{
args->rv = VNET_API_ERROR_INIT_FAILED;
virtio_log_error (vif, "%s (%u) %s", "error in rxq-queue",
@@ -1244,7 +1255,8 @@ virtio_pci_device_init (vlib_main_t * vm, virtio_if_t * vif,
vif->num_rxqs++;
}
- if ((error = virtio_pci_vring_init (vm, vif, TX_QUEUE (i))))
+ if ((error = virtio_pci_vring_init (vm, vif, TX_QUEUE (i),
+ args->tx_queue_size)))
{
args->rv = VNET_API_ERROR_INIT_FAILED;
virtio_log_error (vif, "%s (%u) %s", "error in txq-queue",
diff --git a/src/vnet/devices/virtio/pci.h b/src/vnet/devices/virtio/pci.h
index 0cada61d9b8..2b23377999f 100644
--- a/src/vnet/devices/virtio/pci.h
+++ b/src/vnet/devices/virtio/pci.h
@@ -245,6 +245,7 @@ typedef struct
u64 features;
u8 gso_enabled;
u8 checksum_offload_enabled;
+ u32 tx_queue_size;
virtio_bind_t bind;
u32 buffering_size;
u32 virtio_flags;
diff --git a/src/vnet/devices/virtio/virtio_pci_modern.c b/src/vnet/devices/virtio/virtio_pci_modern.c
index f7313d84bbd..50a7b392367 100644
--- a/src/vnet/devices/virtio/virtio_pci_modern.c
+++ b/src/vnet/devices/virtio/virtio_pci_modern.c
@@ -164,9 +164,7 @@ virtio_pci_modern_set_queue_size (vlib_main_t * vm, virtio_if_t * vif,
return;
}
- if (virtio_pci_modern_get_queue_size (vm, vif, queue_id) > queue_size)
- virtio_pci_reg_write_u16 (vif, VIRTIO_QUEUE_SIZE_OFFSET (vif),
- queue_size);
+ virtio_pci_reg_write_u16 (vif, VIRTIO_QUEUE_SIZE_OFFSET (vif), queue_size);
}
static u16