[RFC PATCH 23/29] drm/xe: Add user fence IRQ handler

[Matthew Brost <matthew.brost@xxxxxxxxx>]

Imported user fences will not be tied to a specific queue or hardware
engine class. Therefore, a device IRQ handler is needed to signal the
associated exported DMA fences.

Signed-off-by: Matthew Brost <matthew.brost@xxxxxxxxx>
---
 drivers/gpu/drm/xe/xe_device.c       | 4 ++++
 drivers/gpu/drm/xe/xe_device_types.h | 3 +++
 drivers/gpu/drm/xe/xe_hw_engine.c    | 4 +++-
 3 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/xe/xe_device.c b/drivers/gpu/drm/xe/xe_device.c
index bbdff4308b2e..573b5f3df0c8 100644
--- a/drivers/gpu/drm/xe/xe_device.c
+++ b/drivers/gpu/drm/xe/xe_device.c
@@ -39,6 +39,7 @@
 #include "xe_gt_sriov_vf.h"
 #include "xe_guc.h"
 #include "xe_hw_engine_group.h"
+#include "xe_hw_fence.h"
 #include "xe_hwmon.h"
 #include "xe_irq.h"
 #include "xe_memirq.h"
@@ -902,6 +903,7 @@ int xe_device_probe(struct xe_device *xe)
 	if (err)
 		goto err;
 
+	xe_hw_fence_irq_init(&xe->user_fence_irq);
 	for_each_gt(gt, xe, id) {
 		last_gt = id;
 
@@ -944,6 +946,7 @@ int xe_device_probe(struct xe_device *xe)
 	xe_oa_fini(xe);
 
 err_fini_gt:
+	xe_hw_fence_irq_finish(&xe->user_fence_irq);
 	for_each_gt(gt, xe, id) {
 		if (id < last_gt)
 			xe_gt_remove(gt);
@@ -979,6 +982,7 @@ void xe_device_remove(struct xe_device *xe)
 
 	xe_heci_gsc_fini(xe);
 
+	xe_hw_fence_irq_finish(&xe->user_fence_irq);
 	for_each_gt(gt, xe, id)
 		xe_gt_remove(gt);
 }
diff --git a/drivers/gpu/drm/xe/xe_device_types.h b/drivers/gpu/drm/xe/xe_device_types.h
index 8592f1b02db1..3ac118c6f85e 100644
--- a/drivers/gpu/drm/xe/xe_device_types.h
+++ b/drivers/gpu/drm/xe/xe_device_types.h
@@ -507,6 +507,9 @@ struct xe_device {
 		int mode;
 	} wedged;
 
+	/** @user_fence_irq: User fence IRQ handler */
+	struct xe_hw_fence_irq user_fence_irq;
+
 #ifdef TEST_VM_OPS_ERROR
 	/**
 	 * @vm_inject_error_position: inject errors at different places in VM
diff --git a/drivers/gpu/drm/xe/xe_hw_engine.c b/drivers/gpu/drm/xe/xe_hw_engine.c
index c4b0dc3be39c..2c9aa5343971 100644
--- a/drivers/gpu/drm/xe/xe_hw_engine.c
+++ b/drivers/gpu/drm/xe/xe_hw_engine.c
@@ -822,8 +822,10 @@ void xe_hw_engine_handle_irq(struct xe_hw_engine *hwe, u16 intr_vec)
 	if (hwe->irq_handler)
 		hwe->irq_handler(hwe, intr_vec);
 
-	if (intr_vec & GT_RENDER_USER_INTERRUPT)
+	if (intr_vec & GT_RENDER_USER_INTERRUPT) {
+		xe_hw_fence_irq_run(&gt_to_xe(hwe->gt)->user_fence_irq);
 		xe_hw_fence_irq_run(hwe->fence_irq);
+	}
 }
 
 /**
-- 
2.34.1