[PATCH 2/5] drm/amdgpu: Fix a bug in setting CP_MEC_DOORBELL_RANGE_UPPER on SOC15

[Zhao, Yong]

Because CP can use all doorbells outside the ones reserved for SDMA, IH,
and VCN, so the value set to CP_MEC_DOORBELL_RANGE_UPPER should be the
maximal index possible in a page.

Change-Id: I402a56ce9a80e6c2ed2f96be431ae71ca88e73a4
Signed-off-by: Yong Zhao <Yong.Zhao at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_doorbell.h | 1 +
 drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c        | 2 +-
 drivers/gpu/drm/amd/amdgpu/vega10_reg_init.c | 3 +++
 drivers/gpu/drm/amd/amdgpu/vega20_reg_init.c | 3 +++
 4 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_doorbell.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_doorbell.h
index 5c8d04c353d0..90eca63605ea 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_doorbell.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_doorbell.h
@@ -73,6 +73,7 @@ struct amdgpu_doorbell_index {
 		} uvd_vce;
 	};
 	uint32_t max_assignment;
+	uint32_t last_idx;
 	/* Per engine SDMA doorbell size in dword */
 	uint32_t dw_range_per_sdma_eng;
 };
diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
index 262ee3cf6f1c..0278e3ab6b94 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
@@ -2998,7 +2998,7 @@ static int gfx_v9_0_kiq_init_register(struct amdgpu_ring *ring)
 		WREG32_SOC15(GC, 0, mmCP_MEC_DOORBELL_RANGE_LOWER,
 					(adev->doorbell_index.kiq * 2) << 2);
 		WREG32_SOC15(GC, 0, mmCP_MEC_DOORBELL_RANGE_UPPER,
-					(adev->doorbell_index.userqueue_end * 2) << 2);
+				(adev->doorbell_index.last_idx * 2) << 2);
 	}
 
 	WREG32_SOC15(GC, 0, mmCP_HQD_PQ_DOORBELL_CONTROL,
diff --git a/drivers/gpu/drm/amd/amdgpu/vega10_reg_init.c b/drivers/gpu/drm/amd/amdgpu/vega10_reg_init.c
index d2409df2dde9..9eb8c9209231 100644
--- a/drivers/gpu/drm/amd/amdgpu/vega10_reg_init.c
+++ b/drivers/gpu/drm/amd/amdgpu/vega10_reg_init.c
@@ -88,5 +88,8 @@ void vega10_doorbell_index_init(struct amdgpu_device *adev)
 			(adev->doorbell_index.sdma_engine[1]
 			- adev->doorbell_index.sdma_engine[0])
 			* adev->doorbell_index.entry_dw_size;
+
+	adev->doorbell_index.last_idx = PAGE_SIZE
+		/ (sizeof(uint32_t) * adev->doorbell_index.entry_dw_size) - 1;
 }
 
diff --git a/drivers/gpu/drm/amd/amdgpu/vega20_reg_init.c b/drivers/gpu/drm/amd/amdgpu/vega20_reg_init.c
index b28c5999d8f0..aa8c7699c689 100644
--- a/drivers/gpu/drm/amd/amdgpu/vega20_reg_init.c
+++ b/drivers/gpu/drm/amd/amdgpu/vega20_reg_init.c
@@ -91,5 +91,8 @@ void vega20_doorbell_index_init(struct amdgpu_device *adev)
 			(adev->doorbell_index.sdma_engine[1]
 			- adev->doorbell_index.sdma_engine[0])
 			* adev->doorbell_index.entry_dw_size;
+
+	adev->doorbell_index.last_idx = PAGE_SIZE
+		/ (sizeof(uint32_t) * adev->doorbell_index.entry_dw_size) - 1;
 }
 
-- 
2.17.1