From d8a1df836d9edf6737f163101a7b1697ac57cc3b Mon Sep 17 00:00:00 2001
From: Ben Goz <ben.goz@amd.com>
Date: Wed, 18 Mar 2015 15:33:43 +0200
Subject: [PATCH] Adding support for mmap events page from Thunk

Signed-off-by: Ben Goz <ben.goz@amd.com>


[ROCm/ROCR-Runtime commit: b27de08442537dd9f853a6e401f21799316b82a8]
---
 projects/rocr-runtime/include/linux/kfd_ioctl.h |  4 ++--
 projects/rocr-runtime/src/events.c              | 17 ++++++++++++++++-
 2 files changed, 18 insertions(+), 3 deletions(-)

diff --git a/projects/rocr-runtime/include/linux/kfd_ioctl.h b/projects/rocr-runtime/include/linux/kfd_ioctl.h
index 442f2e4622..09a22cc681 100644
--- a/projects/rocr-runtime/include/linux/kfd_ioctl.h
+++ b/projects/rocr-runtime/include/linux/kfd_ioctl.h
@@ -170,13 +170,13 @@ struct kfd_ioctl_dbg_wave_control_args {
 #define KFD_IOC_WAIT_RESULT_FAIL	2
 
 struct kfd_ioctl_create_event_args {
-	uint64_t event_trigger_address;	/* from KFD - signal events only */
+	uint64_t event_page_offset;	/* from KFD */
 	uint32_t event_trigger_data;	/* from KFD - signal events only */
 	uint32_t event_type;		/* to KFD */
 	uint32_t auto_reset;		/* to KFD */
 	uint32_t node_id;		/* to KFD - only valid for certain event types */
 	uint32_t event_id;		/* from KFD */
-	uint32_t pad;
+	uint32_t event_slot_index;	/* from KFD */
 };
 
 struct kfd_ioctl_destroy_event_args {
diff --git a/projects/rocr-runtime/src/events.c b/projects/rocr-runtime/src/events.c
index ab2df5b333..8b057b0fc7 100644
--- a/projects/rocr-runtime/src/events.c
+++ b/projects/rocr-runtime/src/events.c
@@ -29,8 +29,11 @@
 #include <time.h>
 #include <errno.h>
 #include <unistd.h>
+#include <sys/mman.h>
 #include "linux/kfd_ioctl.h"
 
+static HSAuint64 *events_page = NULL;
+
 static bool IsSystemEventType(HSA_EVENTTYPE type)
 {
 	// Debug events behave as signal events.
@@ -73,10 +76,22 @@ hsaKmtCreateEvent(
 		return HSAKMT_STATUS_ERROR;
 	}
 
+	if (events_page == NULL && args.event_page_offset > 0) {
+		events_page = mmap(NULL, 4096, PROT_WRITE | PROT_READ,
+				MAP_SHARED, kfd_fd, args.event_page_offset);
+		if (events_page == NULL) {
+			hsaKmtDestroyEvent(e);
+			return HSAKMT_STATUS_ERROR;
+		}
+	}
+
+	if (args.event_page_offset > 0 && args.event_slot_index < 256)
+		e->EventData.HWData2 = (HSAuint64)&events_page[args.event_slot_index];
+
 	e->EventId = args.event_id;
 	e->EventData.EventType = EventDesc->EventType;
 	e->EventData.HWData1 = args.event_id;
-	e->EventData.HWData2 = args.event_trigger_address;
+
 	e->EventData.HWData3 = args.event_trigger_data;
 
 	if (IsSignaled && !IsSystemEventType(e->EventData.EventType)) {