1 /*
2  * Copyright 2016 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  * Author: Monk.liu@amd.com
23  */
24 #ifndef AMDGPU_VIRT_H
25 #define AMDGPU_VIRT_H
26 
27 #define AMDGPU_SRIOV_CAPS_SRIOV_VBIOS  (1 << 0) /* vBIOS is sr-iov ready */
28 #define AMDGPU_SRIOV_CAPS_ENABLE_IOV   (1 << 1) /* sr-iov is enabled on this GPU */
29 #define AMDGPU_SRIOV_CAPS_IS_VF        (1 << 2) /* this GPU is a virtual function */
30 #define AMDGPU_PASSTHROUGH_MODE        (1 << 3) /* thw whole GPU is pass through for VM */
31 #define AMDGPU_SRIOV_CAPS_RUNTIME      (1 << 4) /* is out of full access mode */
32 
33 struct amdgpu_mm_table {
34 	struct amdgpu_bo	*bo;
35 	uint32_t		*cpu_addr;
36 	uint64_t		gpu_addr;
37 };
38 
39 /**
40  * struct amdgpu_virt_ops - amdgpu device virt operations
41  */
42 struct amdgpu_virt_ops {
43 	int (*req_full_gpu)(struct amdgpu_device *adev, bool init);
44 	int (*rel_full_gpu)(struct amdgpu_device *adev, bool init);
45 	int (*reset_gpu)(struct amdgpu_device *adev);
46 	void (*trans_msg)(struct amdgpu_device *adev, u32 req, u32 data1, u32 data2, u32 data3);
47 };
48 
49 /* GPU virtualization */
50 struct amdgpu_virt {
51 	uint32_t			caps;
52 	struct amdgpu_bo		*csa_obj;
53 	uint64_t			csa_vmid0_addr;
54 	bool chained_ib_support;
55 	uint32_t			reg_val_offs;
56 	struct mutex                    lock_reset;
57 	struct amdgpu_irq_src		ack_irq;
58 	struct amdgpu_irq_src		rcv_irq;
59 	struct work_struct		flr_work;
60 	struct amdgpu_mm_table		mm_table;
61 	const struct amdgpu_virt_ops	*ops;
62 };
63 
64 #define AMDGPU_CSA_SIZE    (8 * 1024)
65 #define AMDGPU_CSA_VADDR   (AMDGPU_VA_RESERVED_SIZE - AMDGPU_CSA_SIZE)
66 
67 #define amdgpu_sriov_enabled(adev) \
68 ((adev)->virt.caps & AMDGPU_SRIOV_CAPS_ENABLE_IOV)
69 
70 #define amdgpu_sriov_vf(adev) \
71 ((adev)->virt.caps & AMDGPU_SRIOV_CAPS_IS_VF)
72 
73 #define amdgpu_sriov_bios(adev) \
74 ((adev)->virt.caps & AMDGPU_SRIOV_CAPS_SRIOV_VBIOS)
75 
76 #define amdgpu_sriov_runtime(adev) \
77 ((adev)->virt.caps & AMDGPU_SRIOV_CAPS_RUNTIME)
78 
79 #define amdgpu_passthrough(adev) \
80 ((adev)->virt.caps & AMDGPU_PASSTHROUGH_MODE)
81 
82 static inline bool is_virtual_machine(void)
83 {
84 #ifdef CONFIG_X86
85 	return boot_cpu_has(X86_FEATURE_HYPERVISOR);
86 #else
87 	return false;
88 #endif
89 }
90 
91 struct amdgpu_vm;
92 int amdgpu_allocate_static_csa(struct amdgpu_device *adev);
93 int amdgpu_map_static_csa(struct amdgpu_device *adev, struct amdgpu_vm *vm,
94 			  struct amdgpu_bo_va **bo_va);
95 void amdgpu_virt_init_setting(struct amdgpu_device *adev);
96 uint32_t amdgpu_virt_kiq_rreg(struct amdgpu_device *adev, uint32_t reg);
97 void amdgpu_virt_kiq_wreg(struct amdgpu_device *adev, uint32_t reg, uint32_t v);
98 int amdgpu_virt_request_full_gpu(struct amdgpu_device *adev, bool init);
99 int amdgpu_virt_release_full_gpu(struct amdgpu_device *adev, bool init);
100 int amdgpu_virt_reset_gpu(struct amdgpu_device *adev);
101 int amdgpu_sriov_gpu_reset(struct amdgpu_device *adev, struct amdgpu_job *job);
102 int amdgpu_virt_alloc_mm_table(struct amdgpu_device *adev);
103 void amdgpu_virt_free_mm_table(struct amdgpu_device *adev);
104 
105 #endif
106