[PATCH v5 3/7] drm/amd: Split up UVD suspend into prepare and suspend steps

[Mario Limonciello]

amdgpu_uvd_suspend() allocates memory and copies objects into that
allocated memory.  This fails under memory pressure.  Instead move
majority of this code into a prepare step when swap can still be
allocated.

Signed-off-by: Mario Limonciello <mario.limonciello at amd.com>
---
v4->v5:
 * New patch
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c | 12 ++++++++----
 drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.h |  1 +
 drivers/gpu/drm/amd/amdgpu/uvd_v3_1.c   |  9 +++++++++
 drivers/gpu/drm/amd/amdgpu/uvd_v4_2.c   |  9 +++++++++
 drivers/gpu/drm/amd/amdgpu/uvd_v5_0.c   |  9 +++++++++
 drivers/gpu/drm/amd/amdgpu/uvd_v6_0.c   |  9 +++++++++
 drivers/gpu/drm/amd/amdgpu/uvd_v7_0.c   |  9 +++++++++
 7 files changed, 54 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c
index b7441654e6fa..a53c4ba8b3fe 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c
@@ -418,12 +418,11 @@ int amdgpu_uvd_entity_init(struct amdgpu_device *adev)
 	return 0;
 }
 
-int amdgpu_uvd_suspend(struct amdgpu_device *adev)
+int amdgpu_uvd_prepare(struct amdgpu_device *adev)
 {
 	unsigned int size;
 	void *ptr;
 	int i, j, idx;
-	bool in_ras_intr = amdgpu_ras_intr_triggered();
 
 	cancel_delayed_work_sync(&adev->uvd.idle_work);
 
@@ -452,7 +451,7 @@ int amdgpu_uvd_suspend(struct amdgpu_device *adev)
 
 		if (drm_dev_enter(adev_to_drm(adev), &idx)) {
 			/* re-write 0 since err_event_athub will corrupt VCPU buffer */
-			if (in_ras_intr)
+			if (amdgpu_ras_intr_triggered())
 				memset(adev->uvd.inst[j].saved_bo, 0, size);
 			else
 				memcpy_fromio(adev->uvd.inst[j].saved_bo, ptr, size);
@@ -461,7 +460,12 @@ int amdgpu_uvd_suspend(struct amdgpu_device *adev)
 		}
 	}
 
-	if (in_ras_intr)
+	return 0;
+}
+
+int amdgpu_uvd_suspend(struct amdgpu_device *adev)
+{
+	if (amdgpu_ras_intr_triggered())
 		DRM_WARN("UVD VCPU state may lost due to RAS ERREVENT_ATHUB_INTERRUPT\n");
 
 	return 0;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.h
index 9f89bb7cd60b..72228425e021 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.h
@@ -74,6 +74,7 @@ struct amdgpu_uvd {
 int amdgpu_uvd_sw_init(struct amdgpu_device *adev);
 int amdgpu_uvd_sw_fini(struct amdgpu_device *adev);
 int amdgpu_uvd_entity_init(struct amdgpu_device *adev);
+int amdgpu_uvd_prepare(struct amdgpu_device *adev);
 int amdgpu_uvd_suspend(struct amdgpu_device *adev);
 int amdgpu_uvd_resume(struct amdgpu_device *adev);
 int amdgpu_uvd_get_create_msg(struct amdgpu_ring *ring, uint32_t handle,
diff --git a/drivers/gpu/drm/amd/amdgpu/uvd_v3_1.c b/drivers/gpu/drm/amd/amdgpu/uvd_v3_1.c
index 5534c769b655..869e9948fa36 100644
--- a/drivers/gpu/drm/amd/amdgpu/uvd_v3_1.c
+++ b/drivers/gpu/drm/amd/amdgpu/uvd_v3_1.c
@@ -706,6 +706,14 @@ static int uvd_v3_1_hw_fini(void *handle)
 	return 0;
 }
 
+static int uvd_v3_1_prepare(void *handle)
+{
+	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
+
+	return amdgpu_uvd_prepare(adev);
+
+}
+
 static int uvd_v3_1_suspend(void *handle)
 {
 	int r;
@@ -806,6 +814,7 @@ static const struct amd_ip_funcs uvd_v3_1_ip_funcs = {
 	.sw_fini = uvd_v3_1_sw_fini,
 	.hw_init = uvd_v3_1_hw_init,
 	.hw_fini = uvd_v3_1_hw_fini,
+	.prepare = uvd_v3_1_prepare,
 	.suspend = uvd_v3_1_suspend,
 	.resume = uvd_v3_1_resume,
 	.is_idle = uvd_v3_1_is_idle,
diff --git a/drivers/gpu/drm/amd/amdgpu/uvd_v4_2.c b/drivers/gpu/drm/amd/amdgpu/uvd_v4_2.c
index c108b8381795..e589c17af371 100644
--- a/drivers/gpu/drm/amd/amdgpu/uvd_v4_2.c
+++ b/drivers/gpu/drm/amd/amdgpu/uvd_v4_2.c
@@ -220,6 +220,14 @@ static int uvd_v4_2_hw_fini(void *handle)
 	return 0;
 }
 
+static int uvd_v4_2_prepare(void *handle)
+{
+	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
+
+	return amdgpu_uvd_prepare(adev);
+
+}
+
 static int uvd_v4_2_suspend(void *handle)
 {
 	int r;
@@ -756,6 +764,7 @@ static const struct amd_ip_funcs uvd_v4_2_ip_funcs = {
 	.sw_fini = uvd_v4_2_sw_fini,
 	.hw_init = uvd_v4_2_hw_init,
 	.hw_fini = uvd_v4_2_hw_fini,
+	.prepare = uvd_v4_2_prepare,
 	.suspend = uvd_v4_2_suspend,
 	.resume = uvd_v4_2_resume,
 	.is_idle = uvd_v4_2_is_idle,
diff --git a/drivers/gpu/drm/amd/amdgpu/uvd_v5_0.c b/drivers/gpu/drm/amd/amdgpu/uvd_v5_0.c
index d7e31e48a2b8..65aa23bc2d91 100644
--- a/drivers/gpu/drm/amd/amdgpu/uvd_v5_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/uvd_v5_0.c
@@ -218,6 +218,14 @@ static int uvd_v5_0_hw_fini(void *handle)
 	return 0;
 }
 
+static int uvd_v5_0_prepare(void *handle)
+{
+	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
+
+	return amdgpu_uvd_prepare(adev);
+
+}
+
 static int uvd_v5_0_suspend(void *handle)
 {
 	int r;
@@ -863,6 +871,7 @@ static const struct amd_ip_funcs uvd_v5_0_ip_funcs = {
 	.sw_fini = uvd_v5_0_sw_fini,
 	.hw_init = uvd_v5_0_hw_init,
 	.hw_fini = uvd_v5_0_hw_fini,
+	.prepare = uvd_v5_0_prepare,
 	.suspend = uvd_v5_0_suspend,
 	.resume = uvd_v5_0_resume,
 	.is_idle = uvd_v5_0_is_idle,
diff --git a/drivers/gpu/drm/amd/amdgpu/uvd_v6_0.c b/drivers/gpu/drm/amd/amdgpu/uvd_v6_0.c
index 5fe872f4bea7..a4035aeb973b 100644
--- a/drivers/gpu/drm/amd/amdgpu/uvd_v6_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/uvd_v6_0.c
@@ -542,6 +542,14 @@ static int uvd_v6_0_hw_fini(void *handle)
 	return 0;
 }
 
+static int uvd_v6_0_prepare(void *handle)
+{
+	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
+
+	return amdgpu_uvd_prepare(adev);
+
+}
+
 static int uvd_v6_0_suspend(void *handle)
 {
 	int r;
@@ -1528,6 +1536,7 @@ static const struct amd_ip_funcs uvd_v6_0_ip_funcs = {
 	.sw_fini = uvd_v6_0_sw_fini,
 	.hw_init = uvd_v6_0_hw_init,
 	.hw_fini = uvd_v6_0_hw_fini,
+	.prepare = uvd_v6_0_prepare,
 	.suspend = uvd_v6_0_suspend,
 	.resume = uvd_v6_0_resume,
 	.is_idle = uvd_v6_0_is_idle,
diff --git a/drivers/gpu/drm/amd/amdgpu/uvd_v7_0.c b/drivers/gpu/drm/amd/amdgpu/uvd_v7_0.c
index 86d1d46e1e5e..3228bf1a379c 100644
--- a/drivers/gpu/drm/amd/amdgpu/uvd_v7_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/uvd_v7_0.c
@@ -612,6 +612,14 @@ static int uvd_v7_0_hw_fini(void *handle)
 	return 0;
 }
 
+static int uvd_v7_0_prepare(void *handle)
+{
+	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
+
+	return amdgpu_uvd_prepare(adev);
+
+}
+
 static int uvd_v7_0_suspend(void *handle)
 {
 	int r;
@@ -1787,6 +1795,7 @@ const struct amd_ip_funcs uvd_v7_0_ip_funcs = {
 	.sw_fini = uvd_v7_0_sw_fini,
 	.hw_init = uvd_v7_0_hw_init,
 	.hw_fini = uvd_v7_0_hw_fini,
+	.prepare = uvd_v7_0_prepare,
 	.suspend = uvd_v7_0_suspend,
 	.resume = uvd_v7_0_resume,
 	.is_idle = NULL /* uvd_v7_0_is_idle */,
-- 
2.34.1