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authorStephen Rothwell <sfr@canb.auug.org.au>2005-09-28 02:18:47 +1000
committerStephen Rothwell <sfr@canb.auug.org.au>2005-09-28 02:18:47 +1000
commit544cbbaed4de962fb0e831e8799ab01c448ff37d (patch)
tree3f03ca171a9f8c2e80bdca050d8714994cd6de9f /arch/powerpc/platforms/iseries
parent99a2379cdddcc4e8579e70deb80479450ed65d49 (diff)
powerpc: Merge HvLpEvent.c into lpevents.c
These two files were intimately connected, so just merge them. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Diffstat (limited to 'arch/powerpc/platforms/iseries')
-rw-r--r--arch/powerpc/platforms/iseries/lpevents.c68
1 files changed, 67 insertions, 1 deletions
diff --git a/arch/powerpc/platforms/iseries/lpevents.c b/arch/powerpc/platforms/iseries/lpevents.c
index 819298a8a4d..883603027cc 100644
--- a/arch/powerpc/platforms/iseries/lpevents.c
+++ b/arch/powerpc/platforms/iseries/lpevents.c
@@ -18,6 +18,7 @@
#include <asm/iSeries/ItLpQueue.h>
#include <asm/iSeries/HvLpEvent.h>
#include <asm/iSeries/HvCallEvent.h>
+#include <asm/iSeries/ItLpNaca.h>
/*
* The LpQueue is used to pass event data from the hypervisor to
@@ -42,7 +43,8 @@ static char *event_types[HvLpEvent_Type_NumTypes] = {
};
/* Array of LpEvent handler functions */
-extern LpEventHandler lpEventHandler[HvLpEvent_Type_NumTypes];
+static LpEventHandler lpEventHandler[HvLpEvent_Type_NumTypes];
+static unsigned lpEventHandlerPaths[HvLpEvent_Type_NumTypes];
static struct HvLpEvent * get_next_hvlpevent(void)
{
@@ -198,6 +200,70 @@ void setup_hvlpevent_queue(void)
hvlpevent_queue.xIndex = 0;
}
+/* Register a handler for an LpEvent type */
+int HvLpEvent_registerHandler(HvLpEvent_Type eventType, LpEventHandler handler)
+{
+ if (eventType < HvLpEvent_Type_NumTypes) {
+ lpEventHandler[eventType] = handler;
+ return 0;
+ }
+ return 1;
+}
+EXPORT_SYMBOL(HvLpEvent_registerHandler);
+
+int HvLpEvent_unregisterHandler(HvLpEvent_Type eventType)
+{
+ might_sleep();
+
+ if (eventType < HvLpEvent_Type_NumTypes) {
+ if (!lpEventHandlerPaths[eventType]) {
+ lpEventHandler[eventType] = NULL;
+ /*
+ * We now sleep until all other CPUs have scheduled.
+ * This ensures that the deletion is seen by all
+ * other CPUs, and that the deleted handler isn't
+ * still running on another CPU when we return.
+ */
+ synchronize_rcu();
+ return 0;
+ }
+ }
+ return 1;
+}
+EXPORT_SYMBOL(HvLpEvent_unregisterHandler);
+
+/*
+ * lpIndex is the partition index of the target partition.
+ * needed only for VirtualIo, VirtualLan and SessionMgr. Zero
+ * indicates to use our partition index - for the other types.
+ */
+int HvLpEvent_openPath(HvLpEvent_Type eventType, HvLpIndex lpIndex)
+{
+ if ((eventType < HvLpEvent_Type_NumTypes) &&
+ lpEventHandler[eventType]) {
+ if (lpIndex == 0)
+ lpIndex = itLpNaca.xLpIndex;
+ HvCallEvent_openLpEventPath(lpIndex, eventType);
+ ++lpEventHandlerPaths[eventType];
+ return 0;
+ }
+ return 1;
+}
+
+int HvLpEvent_closePath(HvLpEvent_Type eventType, HvLpIndex lpIndex)
+{
+ if ((eventType < HvLpEvent_Type_NumTypes) &&
+ lpEventHandler[eventType] &&
+ lpEventHandlerPaths[eventType]) {
+ if (lpIndex == 0)
+ lpIndex = itLpNaca.xLpIndex;
+ HvCallEvent_closeLpEventPath(lpIndex, eventType);
+ --lpEventHandlerPaths[eventType];
+ return 0;
+ }
+ return 1;
+}
+
static int proc_lpevents_show(struct seq_file *m, void *v)
{
int cpu, i;