2 * Copyright 2014 Advanced Micro Devices, Inc.
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11 * The above copyright notice and this permission notice shall be included in
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24 #ifndef __AMDGPU_IH_H__
25 #define __AMDGPU_IH_H__
27 /* Maximum number of IVs processed at once */
28 #define AMDGPU_IH_MAX_NUM_IVS 32
31 struct amdgpu_iv_entry;
33 struct amdgpu_ih_regs {
35 uint32_t ih_rb_base_hi;
39 uint32_t ih_doorbell_rptr;
40 uint32_t ih_rb_wptr_addr_lo;
41 uint32_t ih_rb_wptr_addr_hi;
48 struct amdgpu_ih_ring {
55 struct amdgpu_bo *ring_obj;
56 volatile uint32_t *ring;
60 volatile uint32_t *wptr_cpu;
63 volatile uint32_t *rptr_cpu;
68 struct amdgpu_ih_regs ih_regs;
71 /* provided by the ih block */
72 struct amdgpu_ih_funcs {
73 /* ring read/write ptr handling, called from interrupt context */
74 u32 (*get_wptr)(struct amdgpu_device *adev, struct amdgpu_ih_ring *ih);
75 void (*decode_iv)(struct amdgpu_device *adev, struct amdgpu_ih_ring *ih,
76 struct amdgpu_iv_entry *entry);
77 void (*set_rptr)(struct amdgpu_device *adev, struct amdgpu_ih_ring *ih);
80 #define amdgpu_ih_get_wptr(adev, ih) (adev)->irq.ih_funcs->get_wptr((adev), (ih))
81 #define amdgpu_ih_decode_iv(adev, iv) \
82 (adev)->irq.ih_funcs->decode_iv((adev), (ih), (iv))
83 #define amdgpu_ih_set_rptr(adev, ih) (adev)->irq.ih_funcs->set_rptr((adev), (ih))
85 int amdgpu_ih_ring_init(struct amdgpu_device *adev, struct amdgpu_ih_ring *ih,
86 unsigned ring_size, bool use_bus_addr);
87 void amdgpu_ih_ring_fini(struct amdgpu_device *adev, struct amdgpu_ih_ring *ih);
88 void amdgpu_ih_ring_write(struct amdgpu_ih_ring *ih, const uint32_t *iv,
90 int amdgpu_ih_process(struct amdgpu_device *adev, struct amdgpu_ih_ring *ih);
91 void amdgpu_ih_decode_iv_helper(struct amdgpu_device *adev,
92 struct amdgpu_ih_ring *ih,
93 struct amdgpu_iv_entry *entry);