2 * Copyright 2014 Advanced Micro Devices, Inc.
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9 * Software is furnished to do so, subject to the following conditions:
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;
67 struct amdgpu_ih_regs ih_regs;
69 /* For waiting on IH processing at checkpoint. */
70 wait_queue_head_t wait_process;
71 uint64_t processed_timestamp;
74 /* return true if time stamp t2 is after t1 with 48bit wrap around */
75 #define amdgpu_ih_ts_after(t1, t2) \
76 (((int64_t)((t2) << 16) - (int64_t)((t1) << 16)) > 0LL)
78 /* provided by the ih block */
79 struct amdgpu_ih_funcs {
80 /* ring read/write ptr handling, called from interrupt context */
81 u32 (*get_wptr)(struct amdgpu_device *adev, struct amdgpu_ih_ring *ih);
82 void (*decode_iv)(struct amdgpu_device *adev, struct amdgpu_ih_ring *ih,
83 struct amdgpu_iv_entry *entry);
84 uint64_t (*decode_iv_ts)(struct amdgpu_ih_ring *ih, u32 rptr,
86 void (*set_rptr)(struct amdgpu_device *adev, struct amdgpu_ih_ring *ih);
89 #define amdgpu_ih_get_wptr(adev, ih) (adev)->irq.ih_funcs->get_wptr((adev), (ih))
90 #define amdgpu_ih_decode_iv(adev, iv) \
91 (adev)->irq.ih_funcs->decode_iv((adev), (ih), (iv))
92 #define amdgpu_ih_decode_iv_ts(adev, ih, rptr, offset) \
93 (WARN_ON_ONCE(!(adev)->irq.ih_funcs->decode_iv_ts) ? 0 : \
94 (adev)->irq.ih_funcs->decode_iv_ts((ih), (rptr), (offset)))
95 #define amdgpu_ih_set_rptr(adev, ih) (adev)->irq.ih_funcs->set_rptr((adev), (ih))
97 int amdgpu_ih_ring_init(struct amdgpu_device *adev, struct amdgpu_ih_ring *ih,
98 unsigned ring_size, bool use_bus_addr);
99 void amdgpu_ih_ring_fini(struct amdgpu_device *adev, struct amdgpu_ih_ring *ih);
100 void amdgpu_ih_ring_write(struct amdgpu_ih_ring *ih, const uint32_t *iv,
101 unsigned int num_dw);
102 int amdgpu_ih_wait_on_checkpoint_process_ts(struct amdgpu_device *adev,
103 struct amdgpu_ih_ring *ih);
104 int amdgpu_ih_process(struct amdgpu_device *adev, struct amdgpu_ih_ring *ih);
105 void amdgpu_ih_decode_iv_helper(struct amdgpu_device *adev,
106 struct amdgpu_ih_ring *ih,
107 struct amdgpu_iv_entry *entry);
108 uint64_t amdgpu_ih_decode_iv_ts_helper(struct amdgpu_ih_ring *ih, u32 rptr,