drm/amdgpu/gfx8: add support kernel interface queue(KIQ)

KIQ is queue-memory based initialization method: setup KIQ queue
firstly, then send command to KIQ to setup other queues, without
accessing registers.

For virtualization, need KIQ to access virtual function registers
when running on guest mode.

V2: use amdgpu_bo_create/free_kernel to allocate BO.

Signed-off-by: Monk Liu <Monk.Liu@amd.com>
Signed-off-by: Xiangliang Yu <Xiangliang.Yu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Chunming Zhou <david1.zhou@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -185,6 +185,11 @@ enum amdgpu_thermal_irq {
 	AMDGPU_THERMAL_IRQ_LAST
 };
 
+enum amdgpu_kiq_irq {
+	AMDGPU_CP_KIQ_IRQ_DRIVER0 = 0,
+	AMDGPU_CP_KIQ_IRQ_LAST
+};
+
 int amdgpu_set_clockgating_state(struct amdgpu_device *adev,
 				  enum amd_ip_block_type block_type,
 				  enum amd_clockgating_state state);
@@ -777,6 +782,13 @@ struct amdgpu_mec {
 	u32 num_queue;
 };
 
+struct amdgpu_kiq {
+	u64			eop_gpu_addr;
+	struct amdgpu_bo	*eop_obj;
+	struct amdgpu_ring	ring;
+	struct amdgpu_irq_src	irq;
+};
+
 /*
  * GPU scratch registers structures, functions & helpers
  */
@@ -852,6 +864,7 @@ struct amdgpu_gfx {
 	struct amdgpu_gca_config	config;
 	struct amdgpu_rlc		rlc;
 	struct amdgpu_mec		mec;
+	struct amdgpu_kiq		kiq;
 	struct amdgpu_scratch		scratch;
 	const struct firmware		*me_fw;	/* ME firmware */
 	uint32_t			me_fw_version;