[dpdk-dev] [RFC v2 1/3] ethdev: add the API for getting trace information

[Haiyue Wang <haiyue.wang@intel.com>]

Enhance the PMD to support retrieving trace information like
Rx/Tx burst selection etc.

Signed-off-by: Haiyue Wang <haiyue.wang@intel.com>
---
 lib/librte_ethdev/rte_ethdev.c      | 18 ++++++++++++++++++
 lib/librte_ethdev/rte_ethdev.h      |  9 +++++++++
 lib/librte_ethdev/rte_ethdev_core.h |  4 ++++
 3 files changed, 31 insertions(+)

diff --git a/lib/librte_ethdev/rte_ethdev.c b/lib/librte_ethdev/rte_ethdev.c
index 17d183e..6098fad 100644
--- a/lib/librte_ethdev/rte_ethdev.c
+++ b/lib/librte_ethdev/rte_ethdev.c
@@ -4083,6 +4083,24 @@ rte_eth_tx_queue_info_get(uint16_t port_id, uint16_t queue_id,
 }
 
 int
+rte_eth_trace_info_get(uint16_t port_id, uint16_t queue_id,
+		       enum rte_eth_trace type, char *buf, int sz)
+{
+	struct rte_eth_dev *dev;
+
+	RTE_ETH_VALID_PORTID_OR_ERR_RET(port_id, -ENODEV);
+
+	if (buf == NULL)
+		return -EINVAL;
+
+	dev = &rte_eth_devices[port_id];
+
+	RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->trace_info_get, -ENOTSUP);
+
+	return dev->dev_ops->trace_info_get(dev, queue_id, type, buf, sz);
+}
+
+int
 rte_eth_dev_set_mc_addr_list(uint16_t port_id,
 			     struct rte_ether_addr *mc_addr_set,
 			     uint32_t nb_mc_addr)
diff --git a/lib/librte_ethdev/rte_ethdev.h b/lib/librte_ethdev/rte_ethdev.h
index dc6596b..9405157 100644
--- a/lib/librte_ethdev/rte_ethdev.h
+++ b/lib/librte_ethdev/rte_ethdev.h
@@ -404,6 +404,11 @@ struct rte_eth_rxmode {
 	uint64_t offloads;
 };
 
+enum rte_eth_trace {
+	ETH_TRACE_RX_BURST,
+	ETH_TRACE_TX_BURST,
+};
+
 /**
  * VLAN types to indicate if it is for single VLAN, inner VLAN or outer VLAN.
  * Note that single VLAN is treated the same as inner VLAN.
@@ -3556,6 +3561,10 @@ int rte_eth_rx_queue_info_get(uint16_t port_id, uint16_t queue_id,
 int rte_eth_tx_queue_info_get(uint16_t port_id, uint16_t queue_id,
 	struct rte_eth_txq_info *qinfo);
 
+int
+rte_eth_trace_info_get(uint16_t port_id, uint16_t queue_id,
+	enum rte_eth_trace type, char *buf, int sz);
+
 /**
  * Retrieve device registers and register attributes (number of registers and
  * register size)
diff --git a/lib/librte_ethdev/rte_ethdev_core.h b/lib/librte_ethdev/rte_ethdev_core.h
index 2922d5b..366bf5b 100644
--- a/lib/librte_ethdev/rte_ethdev_core.h
+++ b/lib/librte_ethdev/rte_ethdev_core.h
@@ -170,6 +170,9 @@ typedef void (*eth_rxq_info_get_t)(struct rte_eth_dev *dev,
 typedef void (*eth_txq_info_get_t)(struct rte_eth_dev *dev,
 	uint16_t tx_queue_id, struct rte_eth_txq_info *qinfo);
 
+typedef int (*eth_trace_info_get_t)(struct rte_eth_dev *dev,
+	uint16_t queue_id, enum rte_eth_trace type, char *buf, int sz);
+
 typedef int (*mtu_set_t)(struct rte_eth_dev *dev, uint16_t mtu);
 /**< @internal Set MTU. */
 
@@ -418,6 +421,7 @@ struct eth_dev_ops {
 	eth_dev_infos_get_t        dev_infos_get; /**< Get device info. */
 	eth_rxq_info_get_t         rxq_info_get; /**< retrieve RX queue information. */
 	eth_txq_info_get_t         txq_info_get; /**< retrieve TX queue information. */
+	eth_trace_info_get_t       trace_info_get; /**< Get trace. */
 	eth_fw_version_get_t       fw_version_get; /**< Get firmware version. */
 	eth_dev_supported_ptypes_get_t dev_supported_ptypes_get;
 	/**< Get packet types supported and identified by device. */
-- 
2.7.4