[PATCH 18/83] hsa/radeon: Enable interrupts in KFD scheduler

[Oded Gabbay]

This patch enables the use of interrupts in the KFD scheduler when the
scheduler performs its initialization.

It also disables the interrupts when the scheduler stops its work.

Signed-off-by: Oded Gabbay <oded.gabbay at amd.com>
---
 drivers/gpu/hsa/radeon/kfd_sched_cik_static.c | 28 +++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/drivers/gpu/hsa/radeon/kfd_sched_cik_static.c b/drivers/gpu/hsa/radeon/kfd_sched_cik_static.c
index 5d42e88..9add5e5 100644
--- a/drivers/gpu/hsa/radeon/kfd_sched_cik_static.c
+++ b/drivers/gpu/hsa/radeon/kfd_sched_cik_static.c
@@ -486,6 +486,32 @@ static void cik_static_destroy(struct kfd_scheduler *scheduler)
 	kfree(priv);
 }
 
+static void
+enable_interrupts(struct cik_static_private *priv)
+{
+	unsigned int i;
+
+	lock_srbm_index(priv);
+	for (i = 0; i < priv->num_pipes; i++) {
+		pipe_select(priv, i);
+		WRITE_REG(priv->dev, CPC_INT_CNTL, DEQUEUE_REQUEST_INT_ENABLE);
+	}
+	unlock_srbm_index(priv);
+}
+
+static void
+disable_interrupts(struct cik_static_private *priv)
+{
+	unsigned int i;
+
+	lock_srbm_index(priv);
+	for (i = 0; i < priv->num_pipes; i++) {
+		pipe_select(priv, i);
+		WRITE_REG(priv->dev, CPC_INT_CNTL, 0);
+	}
+	unlock_srbm_index(priv);
+}
+
 static void cik_static_start(struct kfd_scheduler *scheduler)
 {
 	struct cik_static_private *priv = kfd_scheduler_to_private(scheduler);
@@ -495,6 +521,7 @@ static void cik_static_start(struct kfd_scheduler *scheduler)
 
 	init_pipes(priv);
 	init_ats(priv);
+	enable_interrupts(priv);
 }
 
 static void cik_static_stop(struct kfd_scheduler *scheduler)
@@ -502,6 +529,7 @@ static void cik_static_stop(struct kfd_scheduler *scheduler)
 	struct cik_static_private *priv = kfd_scheduler_to_private(scheduler);
 
 	exit_ats(priv);
+	disable_interrupts(priv);
 
 	radeon_kfd_vidmem_ungpumap(priv->dev, priv->hpd_mem);
 	radeon_kfd_vidmem_ungpumap(priv->dev, priv->mqd_mem);
-- 
1.9.1