2 * Copyright 2014 Advanced Micro Devices, Inc.
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5 * copy of this software and associated documentation files (the "Software"),
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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
12 * all copies or substantial portions of the Software.
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,
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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
30 #define IH_RING_SIZE (256 * 1024)
31 #define IH_SW_RING_SIZE (16 * 1024) /* enough for 512 CAM entries */
34 struct amdgpu_iv_entry;
36 struct amdgpu_ih_regs {
38 uint32_t ih_rb_base_hi;
42 uint32_t ih_doorbell_rptr;
43 uint32_t ih_rb_wptr_addr_lo;
44 uint32_t ih_rb_wptr_addr_hi;
51 struct amdgpu_ih_ring {
58 struct amdgpu_bo *ring_obj;
59 volatile uint32_t *ring;
63 volatile uint32_t *wptr_cpu;
66 volatile uint32_t *rptr_cpu;
70 struct amdgpu_ih_regs ih_regs;
72 /* For waiting on IH processing at checkpoint. */
73 wait_queue_head_t wait_process;
74 uint64_t processed_timestamp;
77 /* return true if time stamp t2 is after t1 with 48bit wrap around */
78 #define amdgpu_ih_ts_after(t1, t2) \
79 (((int64_t)((t2) << 16) - (int64_t)((t1) << 16)) > 0LL)
81 /* provided by the ih block */
82 struct amdgpu_ih_funcs {
83 /* ring read/write ptr handling, called from interrupt context */
84 u32 (*get_wptr)(struct amdgpu_device *adev, struct amdgpu_ih_ring *ih);
85 void (*decode_iv)(struct amdgpu_device *adev, struct amdgpu_ih_ring *ih,
86 struct amdgpu_iv_entry *entry);
87 uint64_t (*decode_iv_ts)(struct amdgpu_ih_ring *ih, u32 rptr,
89 void (*set_rptr)(struct amdgpu_device *adev, struct amdgpu_ih_ring *ih);
92 #define amdgpu_ih_get_wptr(adev, ih) (adev)->irq.ih_funcs->get_wptr((adev), (ih))
93 #define amdgpu_ih_decode_iv(adev, iv) \
94 (adev)->irq.ih_funcs->decode_iv((adev), (ih), (iv))
95 #define amdgpu_ih_decode_iv_ts(adev, ih, rptr, offset) \
96 (WARN_ON_ONCE(!(adev)->irq.ih_funcs->decode_iv_ts) ? 0 : \
97 (adev)->irq.ih_funcs->decode_iv_ts((ih), (rptr), (offset)))
98 #define amdgpu_ih_set_rptr(adev, ih) (adev)->irq.ih_funcs->set_rptr((adev), (ih))
100 int amdgpu_ih_ring_init(struct amdgpu_device *adev, struct amdgpu_ih_ring *ih,
101 unsigned ring_size, bool use_bus_addr);
102 void amdgpu_ih_ring_fini(struct amdgpu_device *adev, struct amdgpu_ih_ring *ih);
103 void amdgpu_ih_ring_write(struct amdgpu_device *adev, struct amdgpu_ih_ring *ih,
104 const uint32_t *iv, unsigned int num_dw);
105 int amdgpu_ih_wait_on_checkpoint_process_ts(struct amdgpu_device *adev,
106 struct amdgpu_ih_ring *ih);
107 int amdgpu_ih_process(struct amdgpu_device *adev, struct amdgpu_ih_ring *ih);
108 void amdgpu_ih_decode_iv_helper(struct amdgpu_device *adev,
109 struct amdgpu_ih_ring *ih,
110 struct amdgpu_iv_entry *entry);
111 uint64_t amdgpu_ih_decode_iv_ts_helper(struct amdgpu_ih_ring *ih, u32 rptr,
113 const char *amdgpu_ih_ring_name(struct amdgpu_device *adev, struct amdgpu_ih_ring *ih);