[PATCH 04/14] drm/amdgpu/ih: Add retry_cam_ack IH function pointer

["Timur Kristóf" <timur.kristof@gmail.com>]

No functional changes.

This is a refactor to allow different filter CAM implementation
in subsequent commits. The actual new implementations are
going to be in subsequent commits.

Instead of writing the doorbell in amdgpu_gmc_handle_retry_fault()
directly, add an IH function pointer which can be defined in
a different way for different IH versions.

Signed-off-by: Timur Kristóf <timur.kristof@gmail.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c | 7 ++++++-
 drivers/gpu/drm/amd/amdgpu/amdgpu_ih.h  | 1 +
 drivers/gpu/drm/amd/amdgpu/ih_v7_0.c    | 6 ++++++
 drivers/gpu/drm/amd/amdgpu/vega20_ih.c  | 8 +++++++-
 4 files changed, 20 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c
index 3f0b1b7a557b..bb278a61dc9e 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c
@@ -552,6 +552,11 @@ int amdgpu_gmc_handle_retry_fault(struct amdgpu_device *adev,
 	int ret;
 
 	if (adev->irq.retry_cam_enabled) {
+		if (!adev->irq.ih_funcs->retry_cam_ack) {
+			dev_warn(adev->dev, "retry CAM is enabled, but retry_cam_ack is NULL\n");
+			return -EOPNOTSUPP;
+		}
+
 		/* Delegate it to a different ring if the hardware hasn't
 		 * already done it.
 		 */
@@ -562,7 +567,7 @@ int amdgpu_gmc_handle_retry_fault(struct amdgpu_device *adev,
 
 		ret = amdgpu_vm_handle_fault(adev, entry->pasid, entry->vmid, node_id,
 					     addr, entry->timestamp, write_fault);
-		WDOORBELL32(adev->irq.retry_cam_doorbell_index, cam_index);
+		adev->irq.ih_funcs->retry_cam_ack(adev, cam_index);
 		if (ret)
 			return 1;
 	} else {
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ih.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_ih.h
index 444437c30088..e6e34f6e86f4 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ih.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ih.h
@@ -97,6 +97,7 @@ struct amdgpu_ih_funcs {
 	const char *(*node_id_to_die_name)(struct amdgpu_device *adev,
 					   unsigned int node_id,
 					   char *buf, size_t size);
+	void (*retry_cam_ack)(struct amdgpu_device *adev, u32 cam_index);
 };
 
 #define amdgpu_ih_get_wptr(adev, ih) (adev)->irq.ih_funcs->get_wptr((adev), (ih))
diff --git a/drivers/gpu/drm/amd/amdgpu/ih_v7_0.c b/drivers/gpu/drm/amd/amdgpu/ih_v7_0.c
index bd332e8cc5bf..24be9d726428 100644
--- a/drivers/gpu/drm/amd/amdgpu/ih_v7_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/ih_v7_0.c
@@ -289,6 +289,11 @@ static uint32_t ih_v7_0_setup_retry_doorbell(u32 doorbell_index)
 	return val;
 }
 
+static void ih_v7_0_retry_cam_ack(struct amdgpu_device *adev, u32 cam_index)
+{
+	WDOORBELL32(adev->irq.retry_cam_doorbell_index, cam_index);
+}
+
 #define regIH_RING1_CLIENT_CFG_INDEX_V7_1             0x122
 #define regIH_RING1_CLIENT_CFG_INDEX_V7_1_BASE_IDX    0
 #define regIH_RING1_CLIENT_CFG_DATA_V7_1              0x123
@@ -865,6 +870,7 @@ static const struct amdgpu_ih_funcs ih_v7_0_funcs = {
 	.decode_iv_ts = amdgpu_ih_decode_iv_ts_helper,
 	.set_rptr = ih_v7_0_set_rptr,
 	.node_id_to_die_name = ih_v7_0_node_id_to_die_name,
+	.retry_cam_ack = ih_v7_0_retry_cam_ack,
 };
 
 static void ih_v7_0_set_interrupt_funcs(struct amdgpu_device *adev)
diff --git a/drivers/gpu/drm/amd/amdgpu/vega20_ih.c b/drivers/gpu/drm/amd/amdgpu/vega20_ih.c
index 85846fd08ce4..30a82fff3ff7 100644
--- a/drivers/gpu/drm/amd/amdgpu/vega20_ih.c
+++ b/drivers/gpu/drm/amd/amdgpu/vega20_ih.c
@@ -293,6 +293,11 @@ static uint32_t vega20_setup_retry_doorbell(u32 doorbell_index)
 	return val;
 }
 
+static void vega20_retry_cam_ack(struct amdgpu_device *adev, u32 cam_index)
+{
+	WDOORBELL32(adev->irq.retry_cam_doorbell_index, cam_index);
+}
+
 /**
  * vega20_ih_irq_init - init and enable the interrupt ring
  *
@@ -738,7 +743,8 @@ static const struct amdgpu_ih_funcs vega20_ih_funcs = {
 	.get_wptr = vega20_ih_get_wptr,
 	.decode_iv = amdgpu_ih_decode_iv_helper,
 	.decode_iv_ts = amdgpu_ih_decode_iv_ts_helper,
-	.set_rptr = vega20_ih_set_rptr
+	.set_rptr = vega20_ih_set_rptr,
+	.retry_cam_ack = vega20_retry_cam_ack,
 };
 
 static void vega20_ih_set_interrupt_funcs(struct amdgpu_device *adev)
-- 
2.54.0