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#include <linux/chash.h>
28#include "soc15_ih_clientid.h"
29
30struct amdgpu_device;
31
32#define AMDGPU_IH_CLIENTID_LEGACY 0
33#define AMDGPU_IH_CLIENTID_MAX SOC15_IH_CLIENTID_MAX
34
35#define AMDGPU_PAGEFAULT_HASH_BITS 8
36struct amdgpu_retryfault_hashtable {
37	DECLARE_CHASH_TABLE(hash, AMDGPU_PAGEFAULT_HASH_BITS, 8, 0);
38	spinlock_t	lock;
39	int		count;
40};
41
42/*
43 * R6xx+ IH ring
44 */
45struct amdgpu_ih_ring {
46	struct amdgpu_bo	*ring_obj;
47	volatile uint32_t	*ring;
48	unsigned		rptr;
49	unsigned		ring_size;
50	uint64_t		gpu_addr;
51	uint32_t		ptr_mask;
52	atomic_t		lock;
53	bool                    enabled;
54	unsigned		wptr_offs;
55	unsigned		rptr_offs;
56	u32			doorbell_index;
57	bool			use_doorbell;
58	bool			use_bus_addr;
59	dma_addr_t		rb_dma_addr; /* only used when use_bus_addr = true */
60	struct amdgpu_retryfault_hashtable *faults;
61};
62
63#define AMDGPU_IH_SRC_DATA_MAX_SIZE_DW 4
64
65struct amdgpu_iv_entry {
66	unsigned client_id;
67	unsigned src_id;
68	unsigned ring_id;
69	unsigned vmid;
70	unsigned vmid_src;
71	uint64_t timestamp;
72	unsigned timestamp_src;
73	unsigned pasid;
74	unsigned pasid_src;
75	unsigned src_data[AMDGPU_IH_SRC_DATA_MAX_SIZE_DW];
76	const uint32_t *iv_entry;
77};
78
79int amdgpu_ih_ring_init(struct amdgpu_device *adev, unsigned ring_size,
80			bool use_bus_addr);
81void amdgpu_ih_ring_fini(struct amdgpu_device *adev);
82int amdgpu_ih_process(struct amdgpu_device *adev);
83int amdgpu_ih_add_fault(struct amdgpu_device *adev, u64 key);
84void amdgpu_ih_clear_fault(struct amdgpu_device *adev, u64 key);
85
86#endif