drm/amdkfd: Use functions from amdgpu to invalidate vmid in kfd

As part of the change, we stop taking the srbm lock, and start to use
the same invalidation engine and software lock as amdgpu.

Signed-off-by: Yong Zhao <[e-mail]>
Reviewed-by: Alex Deucher <[e-mail]>
Reviewed-by: Felix Kuehling <[e-mail]>
Reviewed-by: Christian König <[e-mail]>
Signed-off-by: Alex Deucher <[e-mail]>

drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v9.c

···
 #include "soc15d.h"
 #include "gmc_v9_0.h"
 
-/* HACK: MMHUB and GC both have VM-related register with the same
- * names but different offsets. Define the MMHUB register we need here
- * with a prefix. A proper solution would be to move the functions
- * programming these registers into gfx_v9_0.c and mmhub_v1_0.c
- * respectively.
- */
-#define mmMMHUB_VM_INVALIDATE_ENG16_REQ				0x06f3
-#define mmMMHUB_VM_INVALIDATE_ENG16_REQ_BASE_IDX		0
-
-#define mmMMHUB_VM_INVALIDATE_ENG16_ACK				0x0705
-#define mmMMHUB_VM_INVALIDATE_ENG16_ACK_BASE_IDX		0
 
 #define V9_PIPE_PER_MEC		(4)
 #define V9_QUEUES_PER_PIPE_MEC	(8)
···
 static void write_vmid_invalidate_request(struct kgd_dev *kgd, uint8_t vmid)
 {
 	struct amdgpu_device *adev = (struct amdgpu_device *) kgd;
-	uint32_t req = (1 << vmid) |
-		(0 << VM_INVALIDATE_ENG16_REQ__FLUSH_TYPE__SHIFT) | /* legacy */
-		VM_INVALIDATE_ENG16_REQ__INVALIDATE_L2_PTES_MASK |
-		VM_INVALIDATE_ENG16_REQ__INVALIDATE_L2_PDE0_MASK |
-		VM_INVALIDATE_ENG16_REQ__INVALIDATE_L2_PDE1_MASK |
-		VM_INVALIDATE_ENG16_REQ__INVALIDATE_L2_PDE2_MASK |
-		VM_INVALIDATE_ENG16_REQ__INVALIDATE_L1_PTES_MASK;
-
-	mutex_lock(&adev->srbm_mutex);
 
 	/* Use legacy mode tlb invalidation.
 	 *
···
 	 * TODO 2: support range-based invalidation, requires kfg2kgd
 	 * interface change
 	 */
-	WREG32(SOC15_REG_OFFSET(GC, 0, mmVM_INVALIDATE_ENG16_REQ), req);
-
-	WREG32(SOC15_REG_OFFSET(MMHUB, 0, mmMMHUB_VM_INVALIDATE_ENG16_REQ),
-				req);
-
-	while (!(RREG32(SOC15_REG_OFFSET(GC, 0, mmVM_INVALIDATE_ENG16_ACK)) &
-					(1 << vmid)))
-		cpu_relax();
-
-	while (!(RREG32(SOC15_REG_OFFSET(MMHUB, 0,
-					mmMMHUB_VM_INVALIDATE_ENG16_ACK)) &
-					(1 << vmid)))
-		cpu_relax();
-
-	mutex_unlock(&adev->srbm_mutex);
-
+	amdgpu_gmc_flush_gpu_tlb(adev, vmid, 0);
 }
 
 static int invalidate_tlbs_with_kiq(struct amdgpu_device *adev, uint16_t pasid)