[PATCH 10/31] drm/amdgpu/gmc12: use MMIO for TLB flushes

[Alex Deucher <alexander.deucher@amd.com>]

MES has a dedicated pipe for these sort of tasks
on GC12 so it shouldn't be an issue.

MES is used to avoid disallowing GFXOFF, but since the
MES will wake GFX anyway to execute the flush, just disallow
it when we flush and use MMIO for consistency with
other chips.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/gmc_v12_0.c | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v12_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v12_0.c
index 3b1fe15fa1c01..cffc818880d12 100644
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v12_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v12_0.c
@@ -968,8 +968,18 @@ static int gmc_v12_0_sw_init(struct amdgpu_ip_block *ip_block)
 	if (r)
 		return r;
 
-	adev->gmc.use_mmio_for_tlb_flush =
-		!(amdgpu_sriov_runtime(adev) || !amdgpu_sriov_vf(adev));
+	switch (amdgpu_ip_version(adev, GC_HWIP, 0)) {
+	case IP_VERSION(12, 0, 0):
+	case IP_VERSION(12, 0, 1):
+	default:
+		adev->gmc.use_mmio_for_tlb_flush =
+			!amdgpu_sriov_runtime(adev);
+		break;
+	case IP_VERSION(12, 1, 0):
+		adev->gmc.use_mmio_for_tlb_flush =
+			!(amdgpu_sriov_runtime(adev) || !amdgpu_sriov_vf(adev));
+		break;
+	}
 
 	return 0;
 }
-- 
2.55.0