[v7,1/7] bus: add hotplug failure handler
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Commit Message
When device be hotplug out, if app still continue to access device by mmio,
it will cause of memory failure and result the system crash.
This patch introduces a bus ops to handle device hotplug failure, it is a
bus specific behavior, so each kind of bus can implement its own logic case
by case.
Signed-off-by: Jeff Guo <jia.guo@intel.com>
---
lib/librte_eal/common/include/rte_bus.h | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
@@ -168,6 +168,20 @@ typedef int (*rte_bus_unplug_t)(struct rte_device *dev);
typedef int (*rte_bus_parse_t)(const char *name, void *addr);
/**
+ * Implementation a specific hotplug failure handler, which is responsible
+ * for handle the failure when the device be hotplug out from the bus. When
+ * hotplug removal event be detected, it could call this function to handle
+ * failure and guaranty the system would not crash in the case.
+ * @param dev
+ * Pointer of the device structure.
+ *
+ * @return
+ * 0 on success.
+ * !0 on error.
+ */
+typedef int (*rte_bus_hotplug_failure_handler_t)(struct rte_device *dev);
+
+/**
* Bus scan policies
*/
enum rte_bus_scan_mode {
@@ -211,6 +225,8 @@ struct rte_bus {
rte_bus_parse_t parse; /**< Parse a device name */
struct rte_bus_conf conf; /**< Bus configuration */
rte_bus_get_iommu_class_t get_iommu_class; /**< Get iommu class */
+ rte_bus_hotplug_failure_handler_t hotplug_failure_handler;
+ /**< handle hotplug failure on bus */
};
/**