[PATCH 11/31] drm/amdgpu: add a buffer funcs callback for TLB invalidation

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

Use this interface to issue TLB invalidations using
SDMA.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.h | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.h
index 4f4e56022c970..4ab92d287675a 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.h
@@ -155,6 +155,23 @@ struct amdgpu_buffer_funcs {
 				 uint64_t dst_offset,
 				 /* number of byte to fill */
 				 uint32_t byte_count);
+
+	/* number of dw to reserve per operation */
+	unsigned	tlb_inv_num_dw;
+
+	/* used for buffer clearing */
+	void (*emit_tlb_inv)(struct amdgpu_device *adev,
+			     struct amdgpu_ib *ib,
+			     /* vmid to target */
+			     unsigned int vmid,
+			     /* vmhub to target */
+			     u32 vmhub,
+			     /* inv eng to target */
+			     u32 eng,
+			     /* flush type */
+			     u32 flush_type,
+			     /* XCC to target */
+			     u32 xcc_inst);
 };
 
 int amdgpu_sdma_reset_engine(struct amdgpu_device *adev, uint32_t instance_id,
@@ -162,6 +179,7 @@ int amdgpu_sdma_reset_engine(struct amdgpu_device *adev, uint32_t instance_id,
 
 #define amdgpu_emit_copy_buffer(adev, ib, s, d, b, t) (adev)->mman.buffer_funcs->emit_copy_buffer((ib),  (s), (d), (b), (t))
 #define amdgpu_emit_fill_buffer(adev, ib, s, d, b) (adev)->mman.buffer_funcs->emit_fill_buffer((ib), (s), (d), (b))
+#define amdgpu_emit_tlb_inv(adev, ib, v, h, e, f, x) (adev)->mman.buffer_funcs->emit_tlb_inv((adev), (ib), (v), (h), (e), (f), (x))
 
 struct amdgpu_sdma_instance *
 amdgpu_sdma_get_instance_from_ring(struct amdgpu_ring *ring);
-- 
2.55.0