drm/amdgpu: add new amdgpu_gmc_emit_flush_gpu_tlb callback

Add a new GMC function to unify vm flushing.

Signed-off-by: Christian König <[e-mail]>
Acked-by: Chunming Zhou <[e-mail]>
Signed-off-by: Alex Deucher <[e-mail]>

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

···
 #define amdgpu_asic_flush_hdp(adev) (adev)->asic_funcs->flush_hdp((adev))
 #define amdgpu_asic_invalidate_hdp(adev) (adev)->asic_funcs->invalidate_hdp((adev))
 #define amdgpu_gmc_flush_gpu_tlb(adev, vmid) (adev)->gmc.gmc_funcs->flush_gpu_tlb((adev), (vmid))
+#define amdgpu_gmc_emit_flush_gpu_tlb(r, vmid, pasid, addr) (r)->adev->gmc.gmc_funcs->emit_flush_gpu_tlb((r), (vmid), (pasid), (addr))
 #define amdgpu_gmc_set_pte_pde(adev, pt, idx, addr, flags) (adev)->gmc.gmc_funcs->set_pte_pde((adev), (pt), (idx), (addr), (flags))
 #define amdgpu_gmc_get_vm_pde(adev, level, dst, flags) (adev)->gmc.gmc_funcs->get_vm_pde((adev), (level), (dst), (flags))
 #define amdgpu_gmc_get_pte_flags(adev, flags) (adev)->gmc.gmc_funcs->get_vm_pte_flags((adev),(flags))

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

···
 	/* flush the vm tlb via mmio */
 	void (*flush_gpu_tlb)(struct amdgpu_device *adev,
 			      uint32_t vmid);
+	/* flush the vm tlb via ring */
+	uint64_t (*emit_flush_gpu_tlb)(struct amdgpu_ring *ring, unsigned vmid,
+				       unsigned pasid, uint64_t pd_addr);
 	/* write pte/pde updates using the cpu */
 	int (*set_pte_pde)(struct amdgpu_device *adev,
 			   void *cpu_pt_addr, /* cpu addr of page table */