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authorMohammed Hawari <mohammed@hawari.fr>2021-02-10 09:20:51 +0100
committerDamjan Marion <dmarion@me.com>2021-03-15 17:31:10 +0000
commit19ff0c3699342b512c03362b3815df684a661f49 (patch)
treebecd8952d4be2e9d6a18d9450e2e03e155f968b2 /src/plugins/dpdk/device/common.c
parent4376ab2a926b36c1131588069a8a9cdd2520073d (diff)
dpdk: implement interrupt mode
Change-Id: I6ababc99ecf559327a4370914580c98d32680175 Type: feature Signed-off-by: Mohammed Hawari <mohammed@hawari.fr>
Diffstat (limited to 'src/plugins/dpdk/device/common.c')
-rw-r--r--src/plugins/dpdk/device/common.c77
1 files changed, 77 insertions, 0 deletions
diff --git a/src/plugins/dpdk/device/common.c b/src/plugins/dpdk/device/common.c
index e9b033ec1af..a837714e75b 100644
--- a/src/plugins/dpdk/device/common.c
+++ b/src/plugins/dpdk/device/common.c
@@ -16,6 +16,8 @@
#include <vnet/vnet.h>
#include <vppinfra/vec.h>
#include <vppinfra/format.h>
+#include <vppinfra/file.h>
+#include <vlib/unix/unix.h>
#include <assert.h>
#include <vnet/ip/ip.h>
@@ -160,6 +162,79 @@ error:
sw->flags |= VNET_SW_INTERFACE_FLAG_ERROR;
}
+static clib_error_t *
+dpdk_rx_read_ready (clib_file_t *uf)
+{
+ vnet_main_t *vnm = vnet_get_main ();
+ dpdk_main_t *dm = &dpdk_main;
+ u32 qidx = uf->private_data;
+ vnet_hw_if_rx_queue_t *rxq = vnet_hw_if_get_rx_queue (vnm, qidx);
+ dpdk_device_t *xd = vec_elt_at_index (dm->devices, rxq->dev_instance);
+
+ u64 b;
+ CLIB_UNUSED (ssize_t size) = read (uf->file_descriptor, &b, sizeof (b));
+ if (rxq->mode != VNET_HW_IF_RX_MODE_POLLING)
+ {
+ vnet_hw_if_rx_queue_set_int_pending (vnm, uf->private_data);
+ rte_eth_dev_rx_intr_enable (xd->port_id, rxq->queue_id);
+ }
+
+ return 0;
+}
+
+static void
+dpdk_setup_interrupts (dpdk_device_t *xd)
+{
+ vnet_main_t *vnm = vnet_get_main ();
+ vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, xd->hw_if_index);
+ if (!hi)
+ return;
+
+ if (!xd->port_conf.intr_conf.rxq)
+ return;
+
+ /* Probe for interrupt support */
+ if (rte_eth_dev_rx_intr_enable (xd->port_id, 0))
+ {
+ dpdk_log_info ("probe for interrupt mode for device %U. Failed.\n",
+ format_dpdk_device_name, xd->port_id);
+ }
+ else
+ {
+ xd->flags |= DPDK_DEVICE_FLAG_INT_SUPPORTED;
+ rte_eth_dev_rx_intr_disable (xd->port_id, 0);
+ dpdk_log_info ("Probe for interrupt mode for device %U. Success.\n",
+ format_dpdk_device_name, xd->port_id);
+ }
+
+ if (xd->flags & DPDK_DEVICE_FLAG_INT_SUPPORTED)
+ {
+ hi->flags |= VNET_HW_INTERFACE_FLAG_SUPPORTS_INT_MODE;
+ for (int q = 0; q < xd->rx_q_used; q++)
+ {
+ dpdk_rx_queue_t *rxq = vec_elt_at_index (xd->rx_queues, q);
+ clib_file_t f = { 0 };
+ rxq->efd = rte_eth_dev_rx_intr_ctl_q_get_fd (xd->port_id, q);
+ if (rxq->efd < 0)
+ {
+ xd->flags &= ~DPDK_DEVICE_FLAG_INT_SUPPORTED;
+ hi->flags &= ~VNET_HW_INTERFACE_FLAG_SUPPORTS_INT_MODE;
+ break;
+ }
+ f.read_function = dpdk_rx_read_ready;
+ f.flags = UNIX_FILE_EVENT_EDGE_TRIGGERED;
+ f.file_descriptor = rxq->efd;
+ f.private_data = rxq->queue_index;
+ f.description =
+ format (0, "%U queue %u", format_dpdk_device_name, xd->port_id, q);
+ rxq->clib_file_index = clib_file_add (&file_main, &f);
+ vnet_hw_if_set_rx_queue_file_index (vnm, rxq->queue_index,
+ rxq->clib_file_index);
+ }
+ }
+ vnet_hw_if_update_runtime_data (vnm, xd->hw_if_index);
+}
+
void
dpdk_device_start (dpdk_device_t * xd)
{
@@ -176,6 +251,8 @@ dpdk_device_start (dpdk_device_t * xd)
return;
}
+ dpdk_setup_interrupts (xd);
+
if (xd->default_mac_address)
rv = rte_eth_dev_default_mac_addr_set (xd->port_id,
(void *) xd->default_mac_address);