@@ -106,8 +106,25 @@ Run-time configuration
- **ethtool** operations on related kernel interfaces also affect the PMD.
+Driver options
+^^^^^^^^^^^^^^
+
- ``class`` parameter [string]
Select the class of the driver that should probe the device.
`vdpa` for the mlx5 vDPA driver.
+- ``timer_delay`` parameter [int]
+
+ A nonzero value allows to configure the internal timer delay in micro-seconds.
+ The internal timer event causes polling of all the CQs, so this number may
+ affect the performance.
+ Default value is 500us.
+
+- ``no_traffic_time`` parameter [int]
+
+ A nonzero value defines the traffic off time, in seconds, that moves the
+ driver to no-traffic mode. In this mode the timer events are stopped and
+ interrupts are configured to the device in order to notify traffic for the
+ driver.
+ Default value is 2s.
@@ -43,6 +43,8 @@
#define MLX5_VDPA_MAX_RETRIES 20
#define MLX5_VDPA_USEC 1000
+#define MLX5_VDPA_DEFAULT_TIMER_DELAY_US 500u
+#define MLX5_VDPA_DEFAULT_NO_TRAFFIC_TIME_S 2LLU
TAILQ_HEAD(mlx5_vdpa_privs, mlx5_vdpa_priv) priv_list =
TAILQ_HEAD_INITIALIZER(priv_list);
@@ -605,6 +607,49 @@
return -rte_errno;
}
+static int
+mlx5_vdpa_args_check_handler(const char *key, const char *val, void *opaque)
+{
+ struct mlx5_vdpa_priv *priv = opaque;
+ unsigned long tmp;
+
+ if (strcmp(key, "class") == 0)
+ return 0;
+ errno = 0;
+ tmp = strtoul(val, NULL, 0);
+ if (errno) {
+ DRV_LOG(WARNING, "%s: \"%s\" is an invalid integer.", key, val);
+ return -errno;
+ }
+ if (strcmp(key, "timer_delay") == 0) {
+ priv->timer_delay_us = (uint32_t)tmp;
+ } else if (strcmp(key, "no_traffic_time") == 0) {
+ priv->no_traffic_time_s = (uint32_t)tmp;
+ } else {
+ DRV_LOG(WARNING, "Invalid key %s.", key);
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static void
+mlx5_vdpa_config_get(struct rte_devargs *devargs, struct mlx5_vdpa_priv *priv)
+{
+ struct rte_kvargs *kvlist;
+
+ priv->timer_delay_us = MLX5_VDPA_DEFAULT_TIMER_DELAY_US;
+ priv->no_traffic_time_s = MLX5_VDPA_DEFAULT_NO_TRAFFIC_TIME_S;
+ if (devargs == NULL)
+ return;
+ kvlist = rte_kvargs_parse(devargs->args, NULL);
+ if (kvlist == NULL)
+ return;
+ rte_kvargs_process(kvlist, NULL, mlx5_vdpa_args_check_handler, priv);
+ rte_kvargs_free(kvlist);
+ DRV_LOG(DEBUG, "timer delay is %u us.", priv->timer_delay_us);
+ DRV_LOG(DEBUG, "no traffic time is %u s.", priv->no_traffic_time_s);
+}
+
/**
* DPDK callback to register a PCI device.
*
@@ -694,6 +739,7 @@
rte_errno = rte_errno ? rte_errno : EINVAL;
goto error;
}
+ mlx5_vdpa_config_get(pci_dev->device.devargs, priv);
SLIST_INIT(&priv->mr_list);
pthread_mutex_lock(&priv_list_lock);
TAILQ_INSERT_TAIL(&priv_list, priv, next);
@@ -110,6 +110,7 @@ struct mlx5_vdpa_priv {
pthread_cond_t timer_cond;
volatile uint8_t timer_on;
uint32_t timer_delay_us;
+ uint32_t no_traffic_time_s;
int id; /* vDPA device id. */
int vid; /* vhost device id. */
struct ibv_context *ctx; /* Device context. */
@@ -20,9 +20,6 @@
#include "mlx5_vdpa.h"
-#define MLX5_VDPA_DEFAULT_TIMER_DELAY_US 500u
-#define MLX5_VDPA_NO_TRAFFIC_TIME_S 2LLU
-
void
mlx5_vdpa_event_qp_global_release(struct mlx5_vdpa_priv *priv)
{
@@ -286,7 +283,7 @@
if (!total) {
/* No traffic ? stop timer and load interrupts. */
if (current_tic - priv->last_traffic_tic >=
- rte_get_timer_hz() * MLX5_VDPA_NO_TRAFFIC_TIME_S) {
+ rte_get_timer_hz() * priv->no_traffic_time_s) {
DRV_LOG(DEBUG, "Device %d traffic was stopped.",
priv->id);
mlx5_vdpa_arm_all_cqs(priv);
@@ -358,7 +355,6 @@
pthread_mutex_init(&priv->timer_lock, NULL);
pthread_cond_init(&priv->timer_cond, NULL);
priv->timer_on = 0;
- priv->timer_delay_us = MLX5_VDPA_DEFAULT_TIMER_DELAY_US;
ret = pthread_create(&priv->timer_tid, NULL, mlx5_vdpa_poll_handle,
(void *)priv);
if (ret) {