/*
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* Copyright 2014 Advanced Micro Devices, Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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*/
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#ifndef __AMDGPU_IH_H__
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#define __AMDGPU_IH_H__
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/* Maximum number of IVs processed at once */
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#define AMDGPU_IH_MAX_NUM_IVS 32
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struct amdgpu_device;
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struct amdgpu_iv_entry;
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/*
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* R6xx+ IH ring
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*/
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struct amdgpu_ih_ring {
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unsigned ring_size;
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uint32_t ptr_mask;
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u32 doorbell_index;
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bool use_doorbell;
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bool use_bus_addr;
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struct amdgpu_bo *ring_obj;
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volatile uint32_t *ring;
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uint64_t gpu_addr;
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uint64_t wptr_addr;
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volatile uint32_t *wptr_cpu;
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uint64_t rptr_addr;
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volatile uint32_t *rptr_cpu;
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bool enabled;
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unsigned rptr;
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atomic_t lock;
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};
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/* provided by the ih block */
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struct amdgpu_ih_funcs {
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/* ring read/write ptr handling, called from interrupt context */
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u32 (*get_wptr)(struct amdgpu_device *adev, struct amdgpu_ih_ring *ih);
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void (*decode_iv)(struct amdgpu_device *adev, struct amdgpu_ih_ring *ih,
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struct amdgpu_iv_entry *entry);
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void (*set_rptr)(struct amdgpu_device *adev, struct amdgpu_ih_ring *ih);
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};
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#define amdgpu_ih_get_wptr(adev, ih) (adev)->irq.ih_funcs->get_wptr((adev), (ih))
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#define amdgpu_ih_decode_iv(adev, iv) \
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(adev)->irq.ih_funcs->decode_iv((adev), (ih), (iv))
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#define amdgpu_ih_set_rptr(adev, ih) (adev)->irq.ih_funcs->set_rptr((adev), (ih))
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int amdgpu_ih_ring_init(struct amdgpu_device *adev, struct amdgpu_ih_ring *ih,
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unsigned ring_size, bool use_bus_addr);
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void amdgpu_ih_ring_fini(struct amdgpu_device *adev, struct amdgpu_ih_ring *ih);
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int amdgpu_ih_process(struct amdgpu_device *adev, struct amdgpu_ih_ring *ih);
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#endif
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