drm/amdgpu: Implement irq interfaces for CGS

This implements the irq src registrar.

Reviewed-by: Jammy Zhou <[e-mail]>
Signed-off-by: Chunming Zhou <[e-mail]>
Signed-off-by: Alex Deucher <[e-mail]>

drivers/gpu/drm/amd/amdgpu/amdgpu_cgs.c

···
 	return -EPERM;
 }
 
+struct cgs_irq_params {
+	unsigned src_id;
+	cgs_irq_source_set_func_t set;
+	cgs_irq_handler_func_t handler;
+	void *private_data;
+};
+
+static int cgs_set_irq_state(struct amdgpu_device *adev,
+			     struct amdgpu_irq_src *src,
+			     unsigned type,
+			     enum amdgpu_interrupt_state state)
+{
+	struct cgs_irq_params *irq_params =
+		(struct cgs_irq_params *)src->data;
+	if (!irq_params)
+		return -EINVAL;
+	if (!irq_params->set)
+		return -EINVAL;
+	return irq_params->set(irq_params->private_data,
+			       irq_params->src_id,
+			       type,
+			       (int)state);
+}
+
+static int cgs_process_irq(struct amdgpu_device *adev,
+			   struct amdgpu_irq_src *source,
+			   struct amdgpu_iv_entry *entry)
+{
+	struct cgs_irq_params *irq_params =
+		(struct cgs_irq_params *)source->data;
+	if (!irq_params)
+		return -EINVAL;
+	if (!irq_params->handler)
+		return -EINVAL;
+	return irq_params->handler(irq_params->private_data,
+				   irq_params->src_id,
+				   entry->iv_entry);
+}
+
+static const struct amdgpu_irq_src_funcs cgs_irq_funcs = {
+	.set = cgs_set_irq_state,
+	.process = cgs_process_irq,
+};
+
 static int amdgpu_cgs_add_irq_source(void *cgs_device, unsigned src_id,
 				     unsigned num_types,
 				     cgs_irq_source_set_func_t set,
 				     cgs_irq_handler_func_t handler,
 				     void *private_data)
 {
-	/* TODO */
-	return 0;
+	CGS_FUNC_ADEV;
+	int ret = 0;
+	struct cgs_irq_params *irq_params;
+	struct amdgpu_irq_src *source =
+		kzalloc(sizeof(struct amdgpu_irq_src), GFP_KERNEL);
+	if (!source)
+		return -ENOMEM;
+	irq_params =
+		kzalloc(sizeof(struct cgs_irq_params), GFP_KERNEL);
+	if (!irq_params) {
+		kfree(source);
+		return -ENOMEM;
+	}
+	source->num_types = num_types;
+	source->funcs = &cgs_irq_funcs;
+	irq_params->src_id = src_id;
+	irq_params->set = set;
+	irq_params->handler = handler;
+	irq_params->private_data = private_data;
+	source->data = (void *)irq_params;
+	ret = amdgpu_irq_add_id(adev, src_id, source);
+	if (ret) {
+		kfree(irq_params);
+		kfree(source);
+	}
+
+	return ret;
 }
 
 static int amdgpu_cgs_irq_get(void *cgs_device, unsigned src_id, unsigned type)
 {
-	/* TODO */
-	return 0;
+	CGS_FUNC_ADEV;
+	return amdgpu_irq_get(adev, adev->irq.sources[src_id], type);
 }
 
 static int amdgpu_cgs_irq_put(void *cgs_device, unsigned src_id, unsigned type)
 {
-	/* TODO */
-	return 0;
+	CGS_FUNC_ADEV;
+	return amdgpu_irq_put(adev, adev->irq.sources[src_id], type);
 }
 
 static const struct cgs_ops amdgpu_cgs_ops = {

drivers/gpu/drm/amd/amdgpu/amdgpu_ih.c

···
 		amdgpu_amdkfd_interrupt(adev,
 				(const void *) &adev->irq.ih.ring[ring_index]);
 
+		entry.iv_entry = (const uint32_t *)
+			&adev->irq.ih.ring[ring_index];
 		amdgpu_ih_decode_iv(adev, &entry);
 		adev->irq.ih.rptr &= adev->irq.ih.ptr_mask;
 

drivers/gpu/drm/amd/amdgpu/amdgpu_ih.h

···
 	unsigned ring_id;
 	unsigned vm_id;
 	unsigned pas_id;
+	const uint32_t *iv_entry;
 };
 
 int amdgpu_ih_ring_init(struct amdgpu_device *adev, unsigned ring_size,

drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c

···
 
 		kfree(src->enabled_types);
 		src->enabled_types = NULL;
+		if (src->data) {
+			kfree(src->data);
+			kfree(src);
+			adev->irq.sources[i] = NULL;
+		}
 	}
 }
 

drivers/gpu/drm/amd/amdgpu/amdgpu_irq.h

···
 	unsigned				num_types;
 	atomic_t				*enabled_types;
 	const struct amdgpu_irq_src_funcs	*funcs;
+	void *data;
 };
 
 /* provided by interrupt generating IP blocks */