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-rw-r--r--src/vnet/devices/virtio/device.c34
-rw-r--r--src/vnet/devices/virtio/virtio.h6
-rw-r--r--src/vnet/devices/virtio/virtio_process.c88
3 files changed, 111 insertions, 17 deletions
diff --git a/src/vnet/devices/virtio/device.c b/src/vnet/devices/virtio/device.c
index 084be962ed7..521d76a8da4 100644
--- a/src/vnet/devices/virtio/device.c
+++ b/src/vnet/devices/virtio/device.c
@@ -761,11 +761,11 @@ static clib_error_t *
virtio_interface_rx_mode_change (vnet_main_t * vnm, u32 hw_if_index, u32 qid,
vnet_hw_if_rx_mode mode)
{
+ vlib_main_t *vm = vnm->vlib_main;
virtio_main_t *mm = &virtio_main;
vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
virtio_if_t *vif = pool_elt_at_index (mm->interfaces, hw->dev_instance);
virtio_vring_t *rx_vring = vec_elt_at_index (vif->rxq_vrings, qid);
- virtio_vring_t *tx_vring = 0;
if (vif->type == VIRTIO_IF_TYPE_PCI && !(vif->support_int_mode))
{
@@ -775,32 +775,32 @@ virtio_interface_rx_mode_change (vnet_main_t * vnm, u32 hw_if_index, u32 qid,
if (mode == VNET_HW_IF_RX_MODE_POLLING)
{
- vec_foreach (tx_vring, vif->txq_vrings)
- {
- /* only enable packet coalesce in poll mode */
- gro_flow_table_set_is_enable (tx_vring->flow_table, 1);
- /* only enable packet buffering in poll mode */
- virtio_vring_buffering_set_is_enable (tx_vring->buffering, 1);
- }
+ if (vif->packet_coalesce || vif->packet_buffering)
+ {
+ if (mm->interrupt_queues_count > 0)
+ mm->interrupt_queues_count--;
+ if (mm->interrupt_queues_count == 0)
+ vlib_process_signal_event (vm,
+ virtio_send_interrupt_node.index,
+ VIRTIO_EVENT_STOP_TIMER, 0);
+ }
rx_vring->avail->flags |= VRING_AVAIL_F_NO_INTERRUPT;
}
else
{
if (vif->packet_coalesce || vif->packet_buffering)
{
- virtio_log_warning (vif,
- "interface %U is in interrupt mode, disabling packet coalescing or buffering",
- format_vnet_sw_if_index_name, vnet_get_main (),
- vif->sw_if_index);
- vec_foreach (tx_vring, vif->txq_vrings)
- {
- gro_flow_table_set_is_enable (tx_vring->flow_table, 0);
- virtio_vring_buffering_set_is_enable (tx_vring->buffering, 0);
- }
+ mm->interrupt_queues_count++;
+ if (mm->interrupt_queues_count == 1)
+ vlib_process_signal_event (vm,
+ virtio_send_interrupt_node.index,
+ VIRTIO_EVENT_START_TIMER, 0);
}
rx_vring->avail->flags &= ~VRING_AVAIL_F_NO_INTERRUPT;
}
+ rx_vring->mode = mode;
+
return 0;
}
diff --git a/src/vnet/devices/virtio/virtio.h b/src/vnet/devices/virtio/virtio.h
index 1cca9f366a8..86660a1f933 100644
--- a/src/vnet/devices/virtio/virtio.h
+++ b/src/vnet/devices/virtio/virtio.h
@@ -57,6 +57,9 @@ typedef enum
#define VIRTIO_RING_FLAG_MASK_INT 1
+#define VIRTIO_EVENT_START_TIMER 1
+#define VIRTIO_EVENT_STOP_TIMER 2
+
typedef struct
{
CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
@@ -84,6 +87,7 @@ typedef struct
u16 last_used_idx;
u16 last_kick_avail_idx;
u32 call_file_index;
+ vnet_hw_if_rx_mode mode;
virtio_vring_buffering_t *buffering;
gro_flow_table_t *flow_table;
} virtio_vring_t;
@@ -189,6 +193,7 @@ typedef struct
typedef struct
{
+ u32 interrupt_queues_count;
/* logging */
vlib_log_class_t log_default;
@@ -198,6 +203,7 @@ typedef struct
extern virtio_main_t virtio_main;
extern vnet_device_class_t virtio_device_class;
extern vlib_node_registration_t virtio_input_node;
+extern vlib_node_registration_t virtio_send_interrupt_node;
clib_error_t *virtio_vring_init (vlib_main_t * vm, virtio_if_t * vif, u16 idx,
u16 sz);
diff --git a/src/vnet/devices/virtio/virtio_process.c b/src/vnet/devices/virtio/virtio_process.c
new file mode 100644
index 00000000000..7a25611bb95
--- /dev/null
+++ b/src/vnet/devices/virtio/virtio_process.c
@@ -0,0 +1,88 @@
+/*
+ *------------------------------------------------------------------
+ * Copyright (c) 2020 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 <vlib/vlib.h>
+#include <vnet/devices/virtio/virtio.h>
+#include <vnet/gso/gro_func.h>
+
+static uword
+virtio_send_interrupt_process (vlib_main_t * vm,
+ vlib_node_runtime_t * rt, vlib_frame_t * f)
+{
+ virtio_if_t *vif;
+ f64 timeout = 3153600000.0 /* 100 years */ ;
+ uword event_type, *event_data = 0;
+ virtio_main_t *vim = &virtio_main;
+
+ while (1)
+ {
+ vlib_process_wait_for_event_or_clock (vm, timeout);
+ event_type = vlib_process_get_events (vm, &event_data);
+ vec_reset_length (event_data);
+
+ switch (event_type)
+ {
+ case VIRTIO_EVENT_STOP_TIMER:
+ timeout = 3153600000.0;
+ break;
+
+ case VIRTIO_EVENT_START_TIMER:
+ timeout = 1e-3; /* 1 millisecond */
+ break;
+
+ case ~0:
+ /* *INDENT-OFF* */
+ pool_foreach (vif, vim->interfaces, {
+ if (vif->packet_coalesce || vif->packet_buffering)
+ {
+ virtio_vring_t *vring;
+ vec_foreach (vring, vif->rxq_vrings)
+ {
+ if (vring->mode == VNET_HW_IF_RX_MODE_INTERRUPT ||
+ vring->mode == VNET_HW_IF_RX_MODE_ADAPTIVE)
+ vnet_device_input_set_interrupt_pending (
+ vnet_get_main (), vif->hw_if_index,
+ RX_QUEUE_ACCESS (vring->queue_id));
+ }
+ }
+ });
+ /* *INDENT-ON* */
+ break;
+
+ default:
+ clib_warning ("BUG: unhandled event type %d", event_type);
+ break;
+ }
+ }
+ return 0;
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (virtio_send_interrupt_node) = {
+ .function = virtio_send_interrupt_process,
+ .type = VLIB_NODE_TYPE_PROCESS,
+ .name = "virtio-send-interrupt-process",
+};
+/* *INDENT-ON* */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */