[dpdk-dev] [PATCH v4 2/4] eal: modify device event callback process func

[Jeff Guo <jia.guo@intel.com>]

This patch modify the device event callback process function name to be
more explicit, change the variable to be const. And more, because not only
eal device helper will use the callback, but also vfio bus will use the
callback to handle hot-unplug, so exposure the API out from private eal.
The bus drivers and eal device would directly use this API to process
device event callback.

Signed-off-by: Jeff Guo <jia.guo@intel.com>
---
v4->v3:
no change.
---
 app/test-pmd/testpmd.c                  |  4 ++--
 lib/librte_eal/bsdapp/eal/eal_dev.c     |  8 ++++++++
 lib/librte_eal/common/eal_common_dev.c  |  5 +++--
 lib/librte_eal/common/eal_private.h     | 12 ------------
 lib/librte_eal/common/include/rte_dev.h | 18 +++++++++++++++++-
 lib/librte_eal/linuxapp/eal/eal_dev.c   |  2 +-
 lib/librte_eal/rte_eal_version.map      |  1 +
 7 files changed, 32 insertions(+), 18 deletions(-)

diff --git a/app/test-pmd/testpmd.c b/app/test-pmd/testpmd.c
index f3f8e44..14a6ab0 100644
--- a/app/test-pmd/testpmd.c
+++ b/app/test-pmd/testpmd.c
@@ -431,7 +431,7 @@ static void check_all_ports_link_status(uint32_t port_mask);
 static int eth_event_callback(portid_t port_id,
 			      enum rte_eth_event_type type,
 			      void *param, void *ret_param);
-static void eth_dev_event_callback(char *device_name,
+static void eth_dev_event_callback(const char *device_name,
 				enum rte_dev_event_type type,
 				void *param);
 
@@ -2216,7 +2216,7 @@ eth_event_callback(portid_t port_id, enum rte_eth_event_type type, void *param,
 
 /* This function is used by the interrupt thread */
 static void
-eth_dev_event_callback(char *device_name, enum rte_dev_event_type type,
+eth_dev_event_callback(const char *device_name, enum rte_dev_event_type type,
 			     __rte_unused void *arg)
 {
 	uint16_t port_id;
diff --git a/lib/librte_eal/bsdapp/eal/eal_dev.c b/lib/librte_eal/bsdapp/eal/eal_dev.c
index 255d611..3a3a2a5 100644
--- a/lib/librte_eal/bsdapp/eal/eal_dev.c
+++ b/lib/librte_eal/bsdapp/eal/eal_dev.c
@@ -33,3 +33,11 @@ rte_dev_hotplug_handle_disable(void)
 	RTE_LOG(ERR, EAL, "Device event is not supported for FreeBSD\n");
 	return -1;
 }
+
+void  __rte_experimental
+rte_dev_event_callback_process(const char *device_name,
+			       enum rte_dev_event_type event)
+{
+	RTE_LOG(ERR, EAL,
+		"Device event callback process is not supported for FreeBSD.\n");
+}
diff --git a/lib/librte_eal/common/eal_common_dev.c b/lib/librte_eal/common/eal_common_dev.c
index 678dbca..2d610a4 100644
--- a/lib/librte_eal/common/eal_common_dev.c
+++ b/lib/librte_eal/common/eal_common_dev.c
@@ -342,8 +342,9 @@ rte_dev_event_callback_unregister(const char *device_name,
 	return ret;
 }
 
-void
-dev_callback_process(char *device_name, enum rte_dev_event_type event)
+void __rte_experimental
+rte_dev_event_callback_process(const char *device_name,
+			       enum rte_dev_event_type event)
 {
 	struct dev_event_callback *cb_lst;
 
diff --git a/lib/librte_eal/common/eal_private.h b/lib/librte_eal/common/eal_private.h
index 637f20d..47e8a33 100644
--- a/lib/librte_eal/common/eal_private.h
+++ b/lib/librte_eal/common/eal_private.h
@@ -259,18 +259,6 @@ struct rte_bus *rte_bus_find_by_device_name(const char *str);
 int rte_mp_channel_init(void);
 
 /**
- * Internal Executes all the user application registered callbacks for
- * the specific device. It is for DPDK internal user only. User
- * application should not call it directly.
- *
- * @param device_name
- *  The device name.
- * @param event
- *  the device event type.
- */
-void dev_callback_process(char *device_name, enum rte_dev_event_type event);
-
-/**
  * @internal
  * Parse a device string and store its information in an
  * rte_devargs structure.
diff --git a/lib/librte_eal/common/include/rte_dev.h b/lib/librte_eal/common/include/rte_dev.h
index ff580a0..58fab43 100644
--- a/lib/librte_eal/common/include/rte_dev.h
+++ b/lib/librte_eal/common/include/rte_dev.h
@@ -39,7 +39,7 @@ struct rte_dev_event {
 	char *devname;			/**< device name */
 };
 
-typedef void (*rte_dev_event_cb_fn)(char *device_name,
+typedef void (*rte_dev_event_cb_fn)(const char *device_name,
 					enum rte_dev_event_type event,
 					void *cb_arg);
 
@@ -438,6 +438,22 @@ rte_dev_event_callback_unregister(const char *device_name,
  * @warning
  * @b EXPERIMENTAL: this API may change without prior notice
  *
+ * Executes all the user application registered callbacks for
+ * the specific device.
+ *
+ * @param device_name
+ *  The device name.
+ * @param event
+ *  the device event type.
+ */
+void  __rte_experimental
+rte_dev_event_callback_process(const char *device_name,
+			       enum rte_dev_event_type event);
+
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice
+ *
  * Start the device event monitoring.
  *
  * @return
diff --git a/lib/librte_eal/linuxapp/eal/eal_dev.c b/lib/librte_eal/linuxapp/eal/eal_dev.c
index 4695fcb..b95d9ee 100644
--- a/lib/librte_eal/linuxapp/eal/eal_dev.c
+++ b/lib/librte_eal/linuxapp/eal/eal_dev.c
@@ -277,7 +277,7 @@ dev_uev_handler(__rte_unused void *param)
 				return;
 			}
 		}
-		dev_callback_process(uevent.devname, uevent.type);
+		rte_dev_event_callback_process(uevent.devname, uevent.type);
 	}
 }
 
diff --git a/lib/librte_eal/rte_eal_version.map b/lib/librte_eal/rte_eal_version.map
index b167b8f..7ae11d8 100644
--- a/lib/librte_eal/rte_eal_version.map
+++ b/lib/librte_eal/rte_eal_version.map
@@ -277,6 +277,7 @@ EXPERIMENTAL {
 	rte_class_register;
 	rte_class_unregister;
 	rte_ctrl_thread_create;
+	rte_dev_event_callback_process;
 	rte_dev_event_callback_register;
 	rte_dev_event_callback_unregister;
 	rte_dev_event_monitor_start;
-- 
2.7.4