[dpdk-dev] [PATCH 2/5] ethdev: add new ops of 'check_command_supported' and 'rx_classification_filter_ctl'

[Helin Zhang <helin.zhang@intel.com>]

Two ops of 'check_command_supported' and 'rx_classification_filter_ctl'
are added.
* 'check_command_supported' is for capability discovery. In anothoer
  word, it is to check if specific feature/command is supported by
  the specific port.
* 'rx_classification_filter_ctl' is for receive classifcation filter
  configuring. e.g. hash function configuration, flow director
  configuration. It is a common API where a lot of commands can
  be implemented for different sub features.

Signed-off-by: Helin Zhang <helin.zhang@intel.com>
---
 lib/librte_ether/rte_ethdev.c | 31 ++++++++++++++++++++++++++
 lib/librte_ether/rte_ethdev.h | 52 +++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 83 insertions(+)

diff --git a/lib/librte_ether/rte_ethdev.c b/lib/librte_ether/rte_ethdev.c
index fd1010a..7afffb4 100644
--- a/lib/librte_ether/rte_ethdev.c
+++ b/lib/librte_ether/rte_ethdev.c
@@ -3002,3 +3002,34 @@ rte_eth_dev_get_flex_filter(uint8_t port_id, uint16_t index,
 	return (*dev->dev_ops->get_flex_filter)(dev, index, filter,
 						rx_queue);
 }
+
+int
+rte_eth_dev_check_command_supported(uint8_t port_id, uint32_t cmd)
+{
+	struct rte_eth_dev *dev;
+
+	if (port_id >= nb_ports) {
+		PMD_DEBUG_TRACE("Invalid port_id=%d\n", port_id);
+		return -ENODEV;
+	}
+	dev = &rte_eth_devices[port_id];
+	FUNC_PTR_OR_ERR_RET(*dev->dev_ops->check_command_supported, -ENOTSUP);
+	return (*dev->dev_ops->check_command_supported)(dev, cmd);
+}
+
+int
+rte_eth_dev_rx_classification_filter_ctl(uint8_t port_id,
+					 uint32_t cmd,
+					 void *args)
+{
+	struct rte_eth_dev *dev;
+
+	if (port_id >= nb_ports) {
+		PMD_DEBUG_TRACE("Invalid port_id=%d\n", port_id);
+		return -ENODEV;
+	}
+	dev = &rte_eth_devices[port_id];
+	FUNC_PTR_OR_ERR_RET(*dev->dev_ops->rx_classification_filter_ctl,
+								-ENOTSUP);
+	return (*dev->dev_ops->rx_classification_filter_ctl)(dev, cmd, args);
+}
diff --git a/lib/librte_ether/rte_ethdev.h b/lib/librte_ether/rte_ethdev.h
index a262463..482e64d 100644
--- a/lib/librte_ether/rte_ethdev.h
+++ b/lib/librte_ether/rte_ethdev.h
@@ -1240,6 +1240,15 @@ typedef int (*eth_mirror_rule_reset_t)(struct rte_eth_dev *dev,
 				  uint8_t rule_id);
 /**< @internal Remove a traffic mirroring rule on an Ethernet device */
 
+typedef int (*eth_check_command_supported_t)(struct rte_eth_dev *dev,
+					     uint32_t cmd);
+/**< @internal check if the command is supported by the Ethernet device */
+
+typedef int (*eth_rx_classification_filter_ctl_t)(struct rte_eth_dev *dev,
+						  uint32_t cmd,
+						  void *arg);
+/**< @internal receive classification filter control operations */
+
 #ifdef RTE_NIC_BYPASS
 
 enum {
@@ -1467,6 +1476,10 @@ struct eth_dev_ops {
 	eth_add_flex_filter_t          add_flex_filter;      /**< add flex filter. */
 	eth_remove_flex_filter_t       remove_flex_filter;   /**< remove flex filter. */
 	eth_get_flex_filter_t          get_flex_filter;      /**< get flex filter. */
+	eth_check_command_supported_t  check_command_supported;
+	/**< check if a command is supported. */
+	eth_rx_classification_filter_ctl_t rx_classification_filter_ctl;
+	/**< common control function of hw hash */
 };
 
 /**
@@ -3557,6 +3570,45 @@ int rte_eth_dev_remove_flex_filter(uint8_t port_id, uint16_t index);
 int rte_eth_dev_get_flex_filter(uint8_t port_id, uint16_t index,
 			struct rte_flex_filter *filter, uint16_t *rx_queue);
 
+/**
+ * Check if the command is supported by an Ethernet device.
+ *
+ * @param port_id
+ *   The port identifier of the Ethernet device.
+ * @param cmd
+ *   The command.
+ *
+ * @return
+ *   - (> 0) The command is supported.
+ *   - (0) The command is not supported.
+ *   - (-ENOTSUP) if hardware doesn't support.
+ *   - (-ENODEV) if <port_id> is invalid.
+ */
+int rte_eth_dev_check_command_supported(uint8_t port_id, uint32_t cmd);
+
+/**
+ * Control the receive classification filter, including hash function
+ * selection. The commands are NIC specific in its exported public
+ * header file. Different types of NIC may have different commands.
+ * For example, the supported commands for i40e can be found in rte_i40e.h.
+ *
+ * @param port_id
+ *   The port identifier of the Ethernet device.
+ * @param cmd
+ *   The commands.
+ * @param args
+ *   A pointer to arguments defined specifically for the command.
+ *
+ * @return
+ *   - (0) if successful.
+ *   - (-ENOTSUP) if hardware doesn't support.
+ *   - (-ENODEV) if <port_id> is invalid.
+ *   - others depends on the specific command implementation.
+ */
+int rte_eth_dev_rx_classification_filter_ctl(uint8_t port_id,
+					     uint32_t cmd,
+					     void *args);
+
 #ifdef __cplusplus
 }
 #endif
-- 
1.8.1.4