[PATCH 2/3] drm/amdgpu: add RAS poison consumption handler

[Tao Zhou]

Add support for general RAS poison consumption handler.

Signed-off-by: Tao Zhou <tao.zhou1 at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c | 43 ++++++++++++++++++++++++-
 drivers/gpu/drm/amd/amdgpu/amdgpu_ras.h |  1 +
 2 files changed, 43 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
index 2d066cff70ea..4bd3c25be809 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
@@ -1515,6 +1515,44 @@ static int amdgpu_ras_fs_fini(struct amdgpu_device *adev)
 /* ras fs end */
 
 /* ih begin */
+static void ras_interrupt_poison_consumption_handler(struct ras_manager *obj,
+				struct amdgpu_iv_entry *entry)
+{
+	bool poison_stat = true, need_reset = true;
+	struct amdgpu_device *adev = obj->adev;
+	struct ras_err_data err_data = {0, 0, 0, NULL};
+	struct ras_ih_data *data = &obj->ih_data;
+	struct amdgpu_ras_block_object *block_obj =
+		amdgpu_ras_get_ras_block(adev, obj->head.block, 0);
+
+	if (!adev->gmc.xgmi.connected_to_cpu)
+		amdgpu_umc_poison_handler(adev, &err_data, false);
+
+	/* Two ways for RAS block's poison consumption implementation:
+	 * 1. define IH callback, or
+	 * 2. implement query and consumption interfaces.
+	 */
+	if (data->cb) {
+		need_reset = !!data->cb(obj->adev, &err_data, entry);
+	} else if (block_obj && block_obj->hw_ops) {
+		if (block_obj->hw_ops->query_poison_status) {
+			poison_stat = block_obj->hw_ops->query_poison_status(adev);
+			if (!poison_stat)
+				dev_info(adev->dev, "No RAS poison status in %s poison IH.\n",
+						block_obj->ras_comm.name);
+		}
+
+		if (poison_stat && block_obj->hw_ops->handle_poison_consumption) {
+			poison_stat = block_obj->hw_ops->handle_poison_consumption(adev);
+			need_reset = poison_stat;
+		}
+	}
+
+	/* gpu reset is fallback for all failed cases */
+	if (need_reset)
+		amdgpu_ras_reset_gpu(adev);
+}
+
 static void ras_interrupt_poison_creation_handler(struct ras_manager *obj,
 				struct amdgpu_iv_entry *entry)
 {
@@ -1563,7 +1601,10 @@ static void amdgpu_ras_interrupt_handler(struct ras_manager *obj)
 		data->rptr = (data->aligned_element_size +
 				data->rptr) % data->ring_size;
 
-		ras_interrupt_poison_creation_handler(obj, &entry);
+		if (obj->head.block == AMDGPU_RAS_BLOCK__UMC)
+			ras_interrupt_poison_creation_handler(obj, &entry);
+		else
+			ras_interrupt_poison_consumption_handler(obj, &entry);
 	}
 }
 
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.h
index 606df8869b89..c4b61785ab5c 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.h
@@ -509,6 +509,7 @@ struct amdgpu_ras_block_hw_ops {
 	void (*reset_ras_error_count)(struct amdgpu_device *adev);
 	void (*reset_ras_error_status)(struct amdgpu_device *adev);
 	bool (*query_poison_status)(struct amdgpu_device *adev);
+	bool (*handle_poison_consumption)(struct amdgpu_device *adev);
 };
 
 /* work flow
-- 
2.35.1