[dpdk-dev] [PATCH v2 1/3] ethdev: Add API to support queue start and stop functionality for RX/TX.

[Ouyang Changchun <changchun.ouyang@intel.com>]

This patch adds API to support queue start and stop functionality for RX/TX.
It allows RX and TX queue is started or stopped one by one, instead of starting
and stopping all of them at the same time. 

Signed-off-by: Ouyang Changchun <changchun.ouyang@intel.com>
---
 lib/librte_eal/linuxapp/eal/eal_memory.c |   2 +-
 lib/librte_ether/rte_ethdev.c            | 104 +++++++++++++++++++++++++++++++
 lib/librte_ether/rte_ethdev.h            |  80 ++++++++++++++++++++++++
 3 files changed, 185 insertions(+), 1 deletion(-)

diff --git a/lib/librte_eal/linuxapp/eal/eal_memory.c b/lib/librte_eal/linuxapp/eal/eal_memory.c
index 69ad63e..dd10e15 100644
--- a/lib/librte_eal/linuxapp/eal/eal_memory.c
+++ b/lib/librte_eal/linuxapp/eal/eal_memory.c
@@ -134,6 +134,7 @@ rte_mem_virt2phy(const void *virtaddr)
 	uint64_t page, physaddr;
 	unsigned long virt_pfn;
 	int page_size;
+	off_t offset;
 
 	/* standard page size */
 	page_size = getpagesize();
@@ -145,7 +146,6 @@ rte_mem_virt2phy(const void *virtaddr)
 		return RTE_BAD_PHYS_ADDR;
 	}
 
-	off_t offset;
 	virt_pfn = (unsigned long)virtaddr / page_size;
 	offset = sizeof(uint64_t) * virt_pfn;
 	if (lseek(fd, offset, SEEK_SET) == (off_t) -1) {
diff --git a/lib/librte_ether/rte_ethdev.c b/lib/librte_ether/rte_ethdev.c
index ec411db..0008755 100644
--- a/lib/librte_ether/rte_ethdev.c
+++ b/lib/librte_ether/rte_ethdev.c
@@ -293,6 +293,110 @@ rte_eth_dev_rx_queue_config(struct rte_eth_dev *dev, uint16_t nb_queues)
 	return (0);
 }
 
+int
+rte_eth_dev_rx_queue_start(uint8_t port_id, uint16_t rx_queue_id)
+{
+	struct rte_eth_dev *dev;
+
+	/* This function is only safe when called from the primary process
+	 * in a multi-process setup*/
+	PROC_PRIMARY_OR_ERR_RET(-E_RTE_SECONDARY);
+
+	if (port_id >= nb_ports) {
+		PMD_DEBUG_TRACE("Invalid port_id=%d\n", port_id);
+		return (-EINVAL);
+	}
+
+	dev = &rte_eth_devices[port_id];
+	if (rx_queue_id >= dev->data->nb_rx_queues) {
+		PMD_DEBUG_TRACE("Invalid RX queue_id=%d\n", rx_queue_id);
+		return (-EINVAL);
+	}
+
+	FUNC_PTR_OR_ERR_RET(*dev->dev_ops->rx_queue_start, -ENOTSUP);
+
+	return dev->dev_ops->rx_queue_start(dev, rx_queue_id);
+
+}
+
+int
+rte_eth_dev_rx_queue_stop(uint8_t port_id, uint16_t rx_queue_id)
+{
+	struct rte_eth_dev *dev;
+
+	/* This function is only safe when called from the primary process
+	 * in a multi-process setup*/
+	PROC_PRIMARY_OR_ERR_RET(-E_RTE_SECONDARY);
+
+	if (port_id >= nb_ports) {
+		PMD_DEBUG_TRACE("Invalid port_id=%d\n", port_id);
+		return (-EINVAL);
+	}
+
+	dev = &rte_eth_devices[port_id];
+	if (rx_queue_id >= dev->data->nb_rx_queues) {
+		PMD_DEBUG_TRACE("Invalid RX queue_id=%d\n", rx_queue_id);
+		return (-EINVAL);
+	}
+
+	FUNC_PTR_OR_ERR_RET(*dev->dev_ops->rx_queue_stop, -ENOTSUP);
+
+	return dev->dev_ops->rx_queue_stop(dev, rx_queue_id);
+
+}
+
+int
+rte_eth_dev_tx_queue_start(uint8_t port_id, uint16_t tx_queue_id)
+{
+	struct rte_eth_dev *dev;
+
+	/* This function is only safe when called from the primary process
+	 * in a multi-process setup*/
+	PROC_PRIMARY_OR_ERR_RET(-E_RTE_SECONDARY);
+
+	if (port_id >= nb_ports) {
+		PMD_DEBUG_TRACE("Invalid port_id=%d\n", port_id);
+		return (-EINVAL);
+	}
+
+	dev = &rte_eth_devices[port_id];
+	if (tx_queue_id >= dev->data->nb_tx_queues) {
+		PMD_DEBUG_TRACE("Invalid TX queue_id=%d\n", tx_queue_id);
+		return (-EINVAL);
+	}
+
+	FUNC_PTR_OR_ERR_RET(*dev->dev_ops->tx_queue_start, -ENOTSUP);
+
+	return dev->dev_ops->tx_queue_start(dev, tx_queue_id);
+
+}
+
+int
+rte_eth_dev_tx_queue_stop(uint8_t port_id, uint16_t tx_queue_id)
+{
+	struct rte_eth_dev *dev;
+
+	/* This function is only safe when called from the primary process
+	 * in a multi-process setup*/
+	PROC_PRIMARY_OR_ERR_RET(-E_RTE_SECONDARY);
+
+	if (port_id >= nb_ports) {
+		PMD_DEBUG_TRACE("Invalid port_id=%d\n", port_id);
+		return (-EINVAL);
+	}
+
+	dev = &rte_eth_devices[port_id];
+	if (tx_queue_id >= dev->data->nb_tx_queues) {
+		PMD_DEBUG_TRACE("Invalid TX queue_id=%d\n", tx_queue_id);
+		return (-EINVAL);
+	}
+
+	FUNC_PTR_OR_ERR_RET(*dev->dev_ops->tx_queue_stop, -ENOTSUP);
+
+	return dev->dev_ops->tx_queue_stop(dev, tx_queue_id);
+
+}
+
 static int
 rte_eth_dev_tx_queue_config(struct rte_eth_dev *dev, uint16_t nb_queues)
 {
diff --git a/lib/librte_ether/rte_ethdev.h b/lib/librte_ether/rte_ethdev.h
index cd4bec6..f2a8dc5 100644
--- a/lib/librte_ether/rte_ethdev.h
+++ b/lib/librte_ether/rte_ethdev.h
@@ -480,6 +480,7 @@ struct rte_eth_vmdq_rx_conf {
 	enum rte_eth_nb_pools nb_queue_pools; /**< VMDq only mode, 8 or 64 pools */
 	uint8_t enable_default_pool; /**< If non-zero, use a default pool */
 	uint8_t default_pool; /**< The default pool, if applicable */
+	uint8_t enable_loop_back; /**< Enable VT loop back */
 	uint8_t nb_pool_maps; /**< We can have up to 64 filters/mappings */
 	struct {
 		uint16_t vlan_id; /**< The vlan id of the received frame */
@@ -501,6 +502,7 @@ struct rte_eth_rxconf {
 	struct rte_eth_thresh rx_thresh; /**< RX ring threshold registers. */
 	uint16_t rx_free_thresh; /**< Drives the freeing of RX descriptors. */
 	uint8_t rx_drop_en; /**< Drop packets if no descriptors are available. */
+	uint8_t start_rx_per_q; /**< start rx per queue. */
 };
 
 #define ETH_TXQ_FLAGS_NOMULTSEGS 0x0001 /**< nb_segs=1 for all mbufs */
@@ -521,6 +523,7 @@ struct rte_eth_txconf {
 	uint16_t tx_rs_thresh; /**< Drives the setting of RS bit on TXDs. */
 	uint16_t tx_free_thresh; /**< Drives the freeing of TX buffers. */
 	uint32_t txq_flags; /**< Set flags for the Tx queue */
+	uint8_t start_tx_per_q; /**< start tx per queue. */
 };
 
 /**
@@ -934,6 +937,14 @@ typedef void (*eth_dev_infos_get_t)(struct rte_eth_dev *dev,
 				    struct rte_eth_dev_info *dev_info);
 /**< @internal Get specific informations of an Ethernet device. */
 
+typedef int (* eth_queue_start_t)(struct rte_eth_dev *dev,
+				    uint16_t queue_id);
+/**< @internal Start rx and tx of a queue of an Ethernet device. */
+
+typedef int (* eth_queue_stop_t)(struct rte_eth_dev *dev,
+				    uint16_t queue_id);
+/**< @internal Stop rx and tx of a queue of an Ethernet device. */
+
 typedef int (*eth_rx_queue_setup_t)(struct rte_eth_dev *dev,
 				    uint16_t rx_queue_id,
 				    uint16_t nb_rx_desc,
@@ -1237,6 +1248,10 @@ struct eth_dev_ops {
 	vlan_tpid_set_t            vlan_tpid_set;      /**< Outer VLAN TPID Setup. */
 	vlan_strip_queue_set_t     vlan_strip_queue_set; /**< VLAN Stripping on queue. */
 	vlan_offload_set_t         vlan_offload_set; /**< Set VLAN Offload. */
+	eth_queue_start_t          rx_queue_start;/**< Start RX for a queue.*/
+	eth_queue_stop_t           rx_queue_stop;/**< Stop RX for a queue.*/
+	eth_queue_start_t          tx_queue_start;/**< Start TX for a queue.*/
+	eth_queue_stop_t           tx_queue_stop;/**< Stop TX for a queue.*/
 	eth_rx_queue_setup_t       rx_queue_setup;/**< Set up device RX queue.*/
 	eth_queue_release_t        rx_queue_release;/**< Release RX queue.*/
 	eth_rx_queue_count_t       rx_queue_count; /**< Get Rx queue count. */
@@ -1733,6 +1748,71 @@ extern int rte_eth_tx_queue_setup(uint8_t port_id, uint16_t tx_queue_id,
  */
 extern int rte_eth_dev_socket_id(uint8_t port_id);
 
+/*
+ * Start specified RX queue of a port
+ *
+ * @param port_id
+ *   The port identifier of the Ethernet device
+ * @param rx_queue_id
+ *   The index of the rx queue to update the ring.
+ *   The value must be in the range [0, nb_rx_queue - 1] previously supplied
+ *   to rte_eth_dev_configure().
+ * @return
+ *   - 0: Success, the transmit queue is correctly set up.
+ *   - -EINVAL: The port_id or the queue_id out of range.
+ *   - -ENOTSUP: The function not supported in PMD driver.
+ */
+extern int rte_eth_dev_rx_queue_start(uint8_t port_id, uint16_t rx_queue_id);
+
+/*
+ * Stop specified RX queue of a port
+ *
+ * @param port_id
+ *   The port identifier of the Ethernet device
+ * @param rx_queue_id
+ *   The index of the rx queue to update the ring.
+ *   The value must be in the range [0, nb_rx_queue - 1] previously supplied
+ *   to rte_eth_dev_configure().
+ * @return
+ *   - 0: Success, the transmit queue is correctly set up.
+ *   - -EINVAL: The port_id or the queue_id out of range.
+ *   - -ENOTSUP: The function not supported in PMD driver.
+ */
+extern int rte_eth_dev_rx_queue_stop(uint8_t port_id, uint16_t rx_queue_id);
+
+/*
+ * Start specified TX queue of a port
+ *
+ * @param port_id
+ *   The port identifier of the Ethernet device
+ * @param tx_queue_id
+ *   The index of the tx queue to update the ring.
+ *   The value must be in the range [0, nb_tx_queue - 1] previously supplied
+ *   to rte_eth_dev_configure().
+ * @return
+ *   - 0: Success, the transmit queue is correctly set up.
+ *   - -EINVAL: The port_id or the queue_id out of range.
+ *   - -ENOTSUP: The function not supported in PMD driver.
+ */
+extern int rte_eth_dev_tx_queue_start(uint8_t port_id, uint16_t tx_queue_id);
+
+/*
+ * Stop specified TX queue of a port
+ *
+ * @param port_id
+ *   The port identifier of the Ethernet device
+ * @param tx_queue_id
+ *   The index of the tx queue to update the ring.
+ *   The value must be in the range [0, nb_tx_queue - 1] previously supplied
+ *   to rte_eth_dev_configure().
+ * @return
+ *   - 0: Success, the transmit queue is correctly set up.
+ *   - -EINVAL: The port_id or the queue_id out of range.
+ *   - -ENOTSUP: The function not supported in PMD driver.
+ */
+extern int rte_eth_dev_tx_queue_stop(uint8_t port_id, uint16_t tx_queue_id);
+
+
 
 /**
  * Start an Ethernet device.
-- 
1.9.0