[RFC PATCH v2 1/5] librte_ether: add internal callback functions

[Bernard Iremonger <bernard.iremonger@intel.com>]

add _rte_eth_dev_callback_process_vf function.
add _rte_eth_dev_callback_process_generic function

Adding a callback to the user application on VF to PF mailbox message,
allows passing information to the application controlling the PF
when a VF mailbox event message is received, such as VF reset.

Signed-off-by: azelezniak <alexz@att.com>
Signed-off-by: Bernard Iremonger <bernard.iremonger@intel.com>
---
 lib/librte_ether/rte_ethdev.c          | 17 ++++++++++
 lib/librte_ether/rte_ethdev.h          | 61 ++++++++++++++++++++++++++++++++++
 lib/librte_ether/rte_ether_version.map |  7 ++++
 3 files changed, 85 insertions(+)

diff --git a/lib/librte_ether/rte_ethdev.c b/lib/librte_ether/rte_ethdev.c
index f62a9ec..1388ea3 100644
--- a/lib/librte_ether/rte_ethdev.c
+++ b/lib/librte_ether/rte_ethdev.c
@@ -2690,6 +2690,20 @@ void
 _rte_eth_dev_callback_process(struct rte_eth_dev *dev,
 	enum rte_eth_event_type event)
 {
+	return _rte_eth_dev_callback_process_generic(dev, event, NULL);
+}
+
+void
+_rte_eth_dev_callback_process_vf(struct rte_eth_dev *dev,
+	enum rte_eth_event_type event, void *param)
+{
+	return _rte_eth_dev_callback_process_generic(dev, event, param);
+}
+
+void
+_rte_eth_dev_callback_process_generic(struct rte_eth_dev *dev,
+	enum rte_eth_event_type event, void *param)
+{
 	struct rte_eth_dev_callback *cb_lst;
 	struct rte_eth_dev_callback dev_cb;
 
@@ -2699,6 +2713,9 @@ _rte_eth_dev_callback_process(struct rte_eth_dev *dev,
 			continue;
 		dev_cb = *cb_lst;
 		cb_lst->active = 1;
+		if (param != NULL)
+			dev_cb.cb_arg = (void *) param;
+
 		rte_spinlock_unlock(&rte_eth_dev_cb_lock);
 		dev_cb.cb_fn(dev->data->port_id, dev_cb.event,
 						dev_cb.cb_arg);
diff --git a/lib/librte_ether/rte_ethdev.h b/lib/librte_ether/rte_ethdev.h
index b0fe033..4fb0b9c 100644
--- a/lib/librte_ether/rte_ethdev.h
+++ b/lib/librte_ether/rte_ethdev.h
@@ -3047,9 +3047,27 @@ enum rte_eth_event_type {
 				/**< queue state event (enabled/disabled) */
 	RTE_ETH_EVENT_INTR_RESET,
 			/**< reset interrupt event, sent to VF on PF reset */
+	RTE_ETH_EVENT_VF_MBOX,  /**< PF mailbox processing callback */
 	RTE_ETH_EVENT_MAX       /**< max value of this enum */
 };
 
+/**
+ * Response sent back to ixgbe driver from user app after callback
+ */
+enum rte_eth_mb_event_rsp {
+	RTE_ETH_MB_EVENT_NOOP_ACK,  /**< skip mbox request and ACK */
+	RTE_ETH_MB_EVENT_NOOP_NACK, /**< skip mbox request and NACK */
+	RTE_ETH_MB_EVENT_PROCEED,  /**< proceed with mbox request  */
+	RTE_ETH_MB_EVENT_MAX       /**< max value of this enum */
+};
+
+struct rte_eth_mb_event_param {
+	uint16_t vfid;
+	uint16_t msg_type;
+	uint16_t retval;
+	void *userdata;
+};
+
 typedef void (*rte_eth_dev_cb_fn)(uint8_t port_id, \
 		enum rte_eth_event_type event, void *cb_arg);
 /**< user application callback to be registered for interrupts */
@@ -3114,6 +3132,49 @@ void _rte_eth_dev_callback_process(struct rte_eth_dev *dev,
 				enum rte_eth_event_type event);
 
 /**
+ * @internal Executes all the user application registered callbacks for
+ * the specific device where parameter have to be passed to user application.
+ * It is for DPDK internal user only. User application should not call it
+ * directly.
+ *
+ * @param dev
+ *  Pointer to struct rte_eth_dev.
+ * @param event
+ *  Eth device interrupt event type.
+ *
+ * @param param
+ *  parameters to pass back to user application.
+ *
+ * @return
+ *  void
+ */
+
+void
+_rte_eth_dev_callback_process_vf(struct rte_eth_dev *dev,
+				enum rte_eth_event_type event, void *param);
+
+/**
+ * @internal Executes all the user application registered callbacks. Used by:
+ * _rte_eth_dev_callback_process and _rte_eth_dev_callback_process_vf
+ * It is for DPDK internal user only. User application should not call it
+ * directly.
+ *
+ * @param dev
+ *  Pointer to struct rte_eth_dev.
+ * @param event
+ *  Eth device interrupt event type.
+ *
+ * @param param
+ *  parameters to pass back to user application.
+ *
+ * @return
+ *  void
+ */
+void
+_rte_eth_dev_callback_process_generic(struct rte_eth_dev *dev,
+				enum rte_eth_event_type event, void *param);
+
+/**
  * When there is no rx packet coming in Rx Queue for a long time, we can
  * sleep lcore related to RX Queue for power saving, and enable rx interrupt
  * to be triggered when rx packect arrives.
diff --git a/lib/librte_ether/rte_ether_version.map b/lib/librte_ether/rte_ether_version.map
index 45ddf44..cb7ef15 100644
--- a/lib/librte_ether/rte_ether_version.map
+++ b/lib/librte_ether/rte_ether_version.map
@@ -139,3 +139,10 @@ DPDK_16.07 {
 	rte_eth_dev_get_port_by_name;
 	rte_eth_xstats_get_names;
 } DPDK_16.04;
+
+DPDK_16.11 {
+	global:
+
+	_rte_eth_dev_callback_process_generic;
+	_rte_eth_dev_callback_process_vf;
+} DPDK_16.07;
-- 
2.9.0