LXR linux/drivers/gpu/drm/amd/amdgpu/amdgpu

   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
  27struct amdgpu_device;
  28
  29/*
  30 * R6xx+ IH ring
  31 */
  32struct 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
  49struct 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
  58int amdgpu_ih_ring_init(struct amdgpu_device *adev, unsigned ring_size,
  59                        bool use_bus_addr);
  60void amdgpu_ih_ring_fini(struct amdgpu_device *adev);
  61int amdgpu_ih_process(struct amdgpu_device *adev);
  62
  63#endif
  64