[PATCH 1/3] drm/amdgpu: Export setup_vm_pt_regs() logic for gfxhub 2.0

[Zhao, Yong]

The KFD code will call this function later.

Change-Id: I88a53368cdee719b2c75393e5cdbd8290584548e
Signed-off-by: Yong Zhao <yong.z...@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/gfxhub_v2_0.c | 20 ++++++++++++--------
 drivers/gpu/drm/amd/amdgpu/gfxhub_v2_0.h |  2 ++
 2 files changed, 14 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/gfxhub_v2_0.c 
b/drivers/gpu/drm/amd/amdgpu/gfxhub_v2_0.c
index a9238735d361..b601c6740ef5 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfxhub_v2_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfxhub_v2_0.c
@@ -46,21 +46,25 @@ u64 gfxhub_v2_0_get_mc_fb_offset(struct amdgpu_device *adev)
        return (u64)RREG32_SOC15(GC, 0, mmGCMC_VM_FB_OFFSET) << 24;
 }
 
-static void gfxhub_v2_0_init_gart_pt_regs(struct amdgpu_device *adev)
+void gfxhub_v2_0_setup_vm_pt_regs(struct amdgpu_device *adev, uint32_t vmid,
+                               uint64_t page_table_base)
 {
-       uint64_t value = amdgpu_gmc_pd_addr(adev->gart.bo);
+       /* two registers distance between mmGCVM_CONTEXT0_* to 
mmGCVM_CONTEXT1_* */
+       int offset = mmGCVM_CONTEXT1_PAGE_TABLE_BASE_ADDR_LO32
+                       - mmGCVM_CONTEXT0_PAGE_TABLE_BASE_ADDR_LO32;
 
+       WREG32_SOC15_OFFSET(GC, 0, mmGCVM_CONTEXT0_PAGE_TABLE_BASE_ADDR_LO32,
+                               offset * vmid, lower_32_bits(page_table_base));
 
-       WREG32_SOC15(GC, 0, mmGCVM_CONTEXT0_PAGE_TABLE_BASE_ADDR_LO32,
-                    lower_32_bits(value));
-
-       WREG32_SOC15(GC, 0, mmGCVM_CONTEXT0_PAGE_TABLE_BASE_ADDR_HI32,
-                    upper_32_bits(value));
+       WREG32_SOC15_OFFSET(GC, 0, mmGCVM_CONTEXT0_PAGE_TABLE_BASE_ADDR_HI32,
+                               offset * vmid, upper_32_bits(page_table_base));
 }
 
 static void gfxhub_v2_0_init_gart_aperture_regs(struct amdgpu_device *adev)
 {
-       gfxhub_v2_0_init_gart_pt_regs(adev);
+       uint64_t pt_base = amdgpu_gmc_pd_addr(adev->gart.bo);
+
+       gfxhub_v2_0_setup_vm_pt_regs(adev, 0, pt_base);
 
        WREG32_SOC15(GC, 0, mmGCVM_CONTEXT0_PAGE_TABLE_START_ADDR_LO32,
                     (u32)(adev->gmc.gart_start >> 12));
diff --git a/drivers/gpu/drm/amd/amdgpu/gfxhub_v2_0.h 
b/drivers/gpu/drm/amd/amdgpu/gfxhub_v2_0.h
index 06807940748b..392b8cd94fc0 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfxhub_v2_0.h
+++ b/drivers/gpu/drm/amd/amdgpu/gfxhub_v2_0.h
@@ -31,5 +31,7 @@ void gfxhub_v2_0_set_fault_enable_default(struct 
amdgpu_device *adev,
                                          bool value);
 void gfxhub_v2_0_init(struct amdgpu_device *adev);
 u64 gfxhub_v2_0_get_mc_fb_offset(struct amdgpu_device *adev);
+void gfxhub_v2_0_setup_vm_pt_regs(struct amdgpu_device *adev, uint32_t vmid,
+                               uint64_t page_table_base);
 
 #endif
-- 
2.17.1

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