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