The patch let etherdev driver expose the capability flag through
rte_eth_dev_info_get when it support deferred queue configuraiton,
then base on the flag rte_eth_[rx|tx]_queue_setup could decide
continue to setup the queue or just return fail when device already
started.
Signed-off-by: Qi Zhang <qi.z.zh...@intel.com>
---
doc/guides/nics/features.rst | 8 ++++++++
lib/librte_ether/rte_ethdev.c | 30 ++++++++++++++++++------------
lib/librte_ether/rte_ethdev.h | 8 ++++++++
3 files changed, 34 insertions(+), 12 deletions(-)
diff --git a/doc/guides/nics/features.rst b/doc/guides/nics/features.rst
index 1b4fb979f..36ad21a1f 100644
--- a/doc/guides/nics/features.rst
+++ b/doc/guides/nics/features.rst
@@ -892,7 +892,15 @@ Documentation describes performance values.
See ``dpdk.org/doc/perf/*``.
+.. _nic_features_queue_deferred_setup_capabilities:
+Queue deferred setup capabilities
+---------------------------------
+
+Supports queue setup / release after device started.
+
+* **[provides] rte_eth_dev_info**:
``deferred_queue_config_capa:DEV_DEFERRED_RX_QUEUE_SETUP,DEV_DEFERRED_TX_QUEUE_SETUP,DEV_DEFERRED_RX_QUEUE_RELEASE,DEV_DEFERRED_TX_QUEUE_RELEASE``.
+* **[related] API**: ``rte_eth_dev_info_get()``.
.. _nic_features_other:
diff --git a/lib/librte_ether/rte_ethdev.c b/lib/librte_ether/rte_ethdev.c
index a6ce2a5ba..6c906c4df 100644
--- a/lib/librte_ether/rte_ethdev.c
+++ b/lib/librte_ether/rte_ethdev.c
@@ -1425,12 +1425,6 @@ rte_eth_rx_queue_setup(uint16_t port_id, uint16_t
rx_queue_id,
return -EINVAL;
}
- if (dev->data->dev_started) {
- RTE_PMD_DEBUG_TRACE(
- "port %d must be stopped to allow configuration\n",
port_id);
- return -EBUSY;
- }
-
RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->dev_infos_get, -ENOTSUP);
RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->rx_queue_setup, -ENOTSUP);
@@ -1474,10 +1468,19 @@ rte_eth_rx_queue_setup(uint16_t port_id, uint16_t
rx_queue_id,
return -EINVAL;
}
+ if (dev->data->dev_started &&
+ !(dev_info.deferred_queue_config_capa &
+ DEV_DEFERRED_RX_QUEUE_SETUP))
+ return -EINVAL;
+
rxq = dev->data->rx_queues;
if (rxq[rx_queue_id]) {
RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->rx_queue_release,
-ENOTSUP);
+ if (dev->data->dev_started &&
+ !(dev_info.deferred_queue_config_capa &
+ DEV_DEFERRED_RX_QUEUE_RELEASE))
+ return -EINVAL;
(*dev->dev_ops->rx_queue_release)(rxq[rx_queue_id]);
rxq[rx_queue_id] = NULL;
}
@@ -1573,12 +1576,6 @@ rte_eth_tx_queue_setup(uint16_t port_id, uint16_t
tx_queue_id,
return -EINVAL;
}
- if (dev->data->dev_started) {
- RTE_PMD_DEBUG_TRACE(
- "port %d must be stopped to allow configuration\n",
port_id);
- return -EBUSY;
- }
-
RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->dev_infos_get, -ENOTSUP);
RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->tx_queue_setup, -ENOTSUP);
@@ -1596,10 +1593,19 @@ rte_eth_tx_queue_setup(uint16_t port_id, uint16_t
tx_queue_id,
return -EINVAL;
}
+ if (dev->data->dev_started &&
+ !(dev_info.deferred_queue_config_capa &
+ DEV_DEFERRED_TX_QUEUE_SETUP))
+ return -EINVAL;
+
txq = dev->data->tx_queues;
if (txq[tx_queue_id]) {
RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->tx_queue_release,
-ENOTSUP);
+ if (dev->data->dev_started &&
+ !(dev_info.deferred_queue_config_capa &
+ DEV_DEFERRED_TX_QUEUE_RELEASE))
+ return -EINVAL;
(*dev->dev_ops->tx_queue_release)(txq[tx_queue_id]);
txq[tx_queue_id] = NULL;
}
diff --git a/lib/librte_ether/rte_ethdev.h b/lib/librte_ether/rte_ethdev.h
index 036153306..6fc960c34 100644
--- a/lib/librte_ether/rte_ethdev.h
+++ b/lib/librte_ether/rte_ethdev.h
@@ -981,6 +981,12 @@ struct rte_eth_conf {
*/
#define DEV_TX_OFFLOAD_SECURITY 0x00020000
+/** < Deferred queue setup / release capability */
+#define DEV_DEFERRED_RX_QUEUE_SETUP 0x00000001
+#define DEV_DEFERRED_TX_QUEUE_SETUP 0x00000002
+#define DEV_DEFERRED_RX_QUEUE_RELEASE 0x00000004
+#define DEV_DEFERRED_TX_QUEUE_RELEASE 0x00000008
+
/*
* If new Tx offload capabilities are defined, they also must be
* mentioned in rte_tx_offload_names in rte_ethdev.c file.
@@ -1029,6 +1035,8 @@ struct rte_eth_dev_info {
/** Configured number of rx/tx queues */
uint16_t nb_rx_queues; /**< Number of RX queues. */
uint16_t nb_tx_queues; /**< Number of TX queues. */
+ uint64_t deferred_queue_config_capa;
+ /**< a queue can be setup/release after dev_start */
};
/**
--
2.13.6
