[PATCH 2/2] drm/amdkfd/gfx10: Calling amdgpu functions to invalidate TLB

[Zeng, Oak]

Calling amdgpu function to invalidate TLB, instead of using a
kfd implementation. Delete the kfd local TLB invalidation
implementation.

Change-Id: Ia16fcf9091a93b8c0acdaf9981f8a5a1f9a5ca1d
Signed-off-by: Oak Zeng <Oak.Zeng at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v10.c | 41 ++--------------------
 1 file changed, 3 insertions(+), 38 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v10.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v10.c
index 39ffb07..e7ae198 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v10.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v10.c
@@ -802,42 +802,6 @@ static uint16_t get_atc_vmid_pasid_mapping_pasid(struct kgd_dev *kgd,
 	return reg & ATC_VMID0_PASID_MAPPING__PASID_MASK;
 }
 
-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 << GCVM_INVALIDATE_ENG0_REQ__FLUSH_TYPE__SHIFT) |/* legacy */
-		GCVM_INVALIDATE_ENG0_REQ__INVALIDATE_L2_PTES_MASK |
-		GCVM_INVALIDATE_ENG0_REQ__INVALIDATE_L2_PDE0_MASK |
-		GCVM_INVALIDATE_ENG0_REQ__INVALIDATE_L2_PDE1_MASK |
-		GCVM_INVALIDATE_ENG0_REQ__INVALIDATE_L2_PDE2_MASK |
-		GCVM_INVALIDATE_ENG0_REQ__INVALIDATE_L1_PTES_MASK;
-
-	mutex_lock(&adev->srbm_mutex);
-
-	/* Use light weight invalidation.
-	 *
-	 * TODO 1: agree on the right set of invalidation registers for
-	 * KFD use. Use the last one for now. Invalidate only GCHUB as
-	 * SDMA is now moved to GCHUB
-	 *
-	 * TODO 2: support range-based invalidation, requires kfg2kgd
-	 * interface change
-	 */
-	WREG32(SOC15_REG_OFFSET(GC, 0, mmGCVM_INVALIDATE_ENG0_ADDR_RANGE_LO32),
-				0xffffffff);
-	WREG32(SOC15_REG_OFFSET(GC, 0, mmGCVM_INVALIDATE_ENG0_ADDR_RANGE_HI32),
-				0x0000001f);
-
-	WREG32(SOC15_REG_OFFSET(GC, 0, mmGCVM_INVALIDATE_ENG0_REQ), req);
-
-	while (!(RREG32(SOC15_REG_OFFSET(GC, 0, mmGCVM_INVALIDATE_ENG0_ACK)) &
-					(1 << vmid)))
-		cpu_relax();
-
-	mutex_unlock(&adev->srbm_mutex);
-}
-
 static int invalidate_tlbs_with_kiq(struct amdgpu_device *adev, uint16_t pasid)
 {
 	signed long r;
@@ -878,7 +842,8 @@ static int invalidate_tlbs(struct kgd_dev *kgd, uint16_t pasid)
 		if (get_atc_vmid_pasid_mapping_valid(kgd, vmid)) {
 			if (get_atc_vmid_pasid_mapping_pasid(kgd, vmid)
 				== pasid) {
-				write_vmid_invalidate_request(kgd, vmid);
+				amdgpu_gmc_flush_vm_hub(adev, vmid,
+						AMDGPU_GFXHUB_0, 0);
 				break;
 			}
 		}
@@ -896,7 +861,7 @@ static int invalidate_tlbs_vmid(struct kgd_dev *kgd, uint16_t vmid)
 		return 0;
 	}
 
-	write_vmid_invalidate_request(kgd, vmid);
+	amdgpu_gmc_flush_vm_hub(adev, vmid, AMDGPU_GFXHUB_0, 0);
 	return 0;
 }
 
-- 
2.7.4