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_IRQ_H__
25 #define __AMDGPU_IRQ_H__
26 
27 #include <linux/irqdomain.h>
28 #include "soc15_ih_clientid.h"
29 #include "amdgpu_ih.h"
30 
31 #define AMDGPU_MAX_IRQ_SRC_ID		0x100
32 #define AMDGPU_MAX_IRQ_CLIENT_ID	0x100
33 
34 #define AMDGPU_IRQ_CLIENTID_LEGACY	0
35 #define AMDGPU_IRQ_CLIENTID_MAX		SOC15_IH_CLIENTID_MAX
36 
37 #define AMDGPU_IRQ_SRC_DATA_MAX_SIZE_DW	4
38 
39 struct amdgpu_device;
40 
41 enum amdgpu_interrupt_state {
42 	AMDGPU_IRQ_STATE_DISABLE,
43 	AMDGPU_IRQ_STATE_ENABLE,
44 };
45 
46 struct amdgpu_iv_entry {
47 	struct amdgpu_ih_ring *ih;
48 	unsigned client_id;
49 	unsigned src_id;
50 	unsigned ring_id;
51 	unsigned vmid;
52 	unsigned vmid_src;
53 	uint64_t timestamp;
54 	unsigned timestamp_src;
55 	unsigned pasid;
56 	unsigned pasid_src;
57 	unsigned src_data[AMDGPU_IRQ_SRC_DATA_MAX_SIZE_DW];
58 	const uint32_t *iv_entry;
59 };
60 
61 struct amdgpu_irq_src {
62 	unsigned				num_types;
63 	atomic_t				*enabled_types;
64 	const struct amdgpu_irq_src_funcs	*funcs;
65 };
66 
67 struct amdgpu_irq_client {
68 	struct amdgpu_irq_src **sources;
69 };
70 
71 /* provided by interrupt generating IP blocks */
72 struct amdgpu_irq_src_funcs {
73 	int (*set)(struct amdgpu_device *adev, struct amdgpu_irq_src *source,
74 		   unsigned type, enum amdgpu_interrupt_state state);
75 
76 	int (*process)(struct amdgpu_device *adev,
77 		       struct amdgpu_irq_src *source,
78 		       struct amdgpu_iv_entry *entry);
79 };
80 
81 struct amdgpu_irq {
82 	bool				installed;
83 	spinlock_t			lock;
84 	/* interrupt sources */
85 	struct amdgpu_irq_client	client[AMDGPU_IRQ_CLIENTID_MAX];
86 
87 	/* status, etc. */
88 	bool				msi_enabled; /* msi enabled */
89 
90 	/* interrupt rings */
91 	struct amdgpu_ih_ring		ih, ih1, ih2, ih_soft;
92 	const struct amdgpu_ih_funcs    *ih_funcs;
93 	struct work_struct		ih1_work, ih2_work, ih_soft_work;
94 	struct amdgpu_irq_src		self_irq;
95 
96 	/* gen irq stuff */
97 	struct irq_domain		*domain; /* GPU irq controller domain */
98 	unsigned			virq[AMDGPU_MAX_IRQ_SRC_ID];
99 	uint32_t                        srbm_soft_reset;
100 };
101 
102 void amdgpu_irq_disable_all(struct amdgpu_device *adev);
103 irqreturn_t amdgpu_irq_handler(int irq, void *arg);
104 
105 int amdgpu_irq_init(struct amdgpu_device *adev);
106 void amdgpu_irq_fini_sw(struct amdgpu_device *adev);
107 void amdgpu_irq_fini_hw(struct amdgpu_device *adev);
108 int amdgpu_irq_add_id(struct amdgpu_device *adev,
109 		      unsigned client_id, unsigned src_id,
110 		      struct amdgpu_irq_src *source);
111 void amdgpu_irq_dispatch(struct amdgpu_device *adev,
112 			 struct amdgpu_ih_ring *ih);
113 void amdgpu_irq_delegate(struct amdgpu_device *adev,
114 			 struct amdgpu_iv_entry *entry,
115 			 unsigned int num_dw);
116 int amdgpu_irq_update(struct amdgpu_device *adev, struct amdgpu_irq_src *src,
117 		      unsigned type);
118 int amdgpu_irq_get(struct amdgpu_device *adev, struct amdgpu_irq_src *src,
119 		   unsigned type);
120 int amdgpu_irq_put(struct amdgpu_device *adev, struct amdgpu_irq_src *src,
121 		   unsigned type);
122 bool amdgpu_irq_enabled(struct amdgpu_device *adev, struct amdgpu_irq_src *src,
123 			unsigned type);
124 void amdgpu_irq_gpu_reset_resume_helper(struct amdgpu_device *adev);
125 
126 int amdgpu_irq_add_domain(struct amdgpu_device *adev);
127 void amdgpu_irq_remove_domain(struct amdgpu_device *adev);
128 unsigned amdgpu_irq_create_mapping(struct amdgpu_device *adev, unsigned src_id);
129 
130 #endif
131