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

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Message-Id: <1405029027-6085-17-git-send-email-oded.gabbay@amd.com>
Date:	Fri, 11 Jul 2014 00:50:18 +0300
From:	Oded Gabbay <oded.gabbay@...il.com>
To:	David Airlie <airlied@...ux.ie>,
	Alex Deucher <alexander.deucher@....com>,
	Jerome Glisse <j.glisse@...il.com>
Cc:	linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
	John Bridgman <John.Bridgman@....com>,
	Andrew Lewycky <Andrew.Lewycky@....com>,
	Joerg Roedel <joro@...tes.org>,
	Oded Gabbay <oded.gabbay@....com>
Subject: [PATCH 18/83] hsa/radeon: Enable interrupts in KFD scheduler

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@....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

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