1 files changed, 62 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ih.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_ih.h
new file mode 100644
index 000000000000..c62b09e555d6
--- /dev/null
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ih.h
@@ -0,0 +1,62 @@
+/*
+ * Copyright 2014 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ */
+
+#ifndef __AMDGPU_IH_H__
+#define __AMDGPU_IH_H__
+
+struct amdgpu_device;
+
+/*
+ * R6xx+ IH ring
+ */
+struct amdgpu_ih_ring {
+        struct amdgpu_bo        *ring_obj;
+        volatile uint32_t       *ring;
+        unsigned                rptr;
+        unsigned                ring_size;
+        uint64_t                gpu_addr;
+        uint32_t                ptr_mask;
+        atomic_t                lock;
+        bool                    enabled;
+        unsigned                wptr_offs;
+        unsigned                rptr_offs;
+        u32                     doorbell_index;
+        bool                    use_doorbell;
+        bool                    use_bus_addr;
+        dma_addr_t              rb_dma_addr; /* only used when use_bus_addr = true */
+};
+
+struct amdgpu_iv_entry {
+        unsigned src_id;
+        unsigned src_data;
+        unsigned ring_id;
+        unsigned vm_id;
+        unsigned pas_id;
+};
+
+int amdgpu_ih_ring_init(struct amdgpu_device *adev, unsigned ring_size,
+                        bool use_bus_addr);
+void amdgpu_ih_ring_fini(struct amdgpu_device *adev);
+int amdgpu_ih_process(struct amdgpu_device *adev);
+
+#endif