drivers/gpu/drm/amd/amdgpu/amdgpu_ih.h

   1 /*
   2  * Copyright 2014 Advanced Micro Devices, Inc.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20  * OTHER DEALINGS IN THE SOFTWARE.
  21  *
  22  */
  23
  24 #ifndef __AMDGPU_IH_H__
  25 #define __AMDGPU_IH_H__
  26
  27 struct amdgpu_device;
  28
  29 /*
  30  * R6xx+ IH ring
  31  */
  32 struct amdgpu_ih_ring {
  33         struct amdgpu_bo        *ring_obj;
  34         volatile uint32_t       *ring;
  35         unsigned                rptr;
  36         unsigned                ring_size;
  37         uint64_t                gpu_addr;
  38         uint32_t                ptr_mask;
  39         atomic_t                lock;
  40         bool                    enabled;
  41         unsigned                wptr_offs;
  42         unsigned                rptr_offs;
  43         u32                     doorbell_index;
  44         bool                    use_doorbell;
  45         bool                    use_bus_addr;
  46         dma_addr_t              rb_dma_addr; /* only used when use_bus_addr = true */
  47 };
  48
  49 struct amdgpu_iv_entry {
  50         unsigned src_id;
  51         unsigned src_data;
  52         unsigned ring_id;
  53         unsigned vm_id;
  54         unsigned pas_id;
  55         const uint32_t *iv_entry;
  56 };
  57
  58 int amdgpu_ih_ring_init(struct amdgpu_device *adev, unsigned ring_size,
  59                         bool use_bus_addr);
  60 void amdgpu_ih_ring_fini(struct amdgpu_device *adev);
  61 int amdgpu_ih_process(struct amdgpu_device *adev);
  62
  63 #endif