1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
2 | /* |
3 | * AMD Secure Processor driver |
4 | * |
5 | * Copyright (C) 2017-2019 Advanced Micro Devices, Inc. |
6 | * |
7 | * Author: Tom Lendacky <thomas.lendacky@amd.com> |
8 | * Author: Gary R Hook <gary.hook@amd.com> |
9 | * Author: Brijesh Singh <brijesh.singh@amd.com> |
10 | */ |
11 | |
12 | #ifndef __SP_DEV_H__ |
13 | #define __SP_DEV_H__ |
14 | |
15 | #include <linux/device.h> |
16 | #include <linux/spinlock.h> |
17 | #include <linux/mutex.h> |
18 | #include <linux/list.h> |
19 | #include <linux/wait.h> |
20 | #include <linux/dmapool.h> |
21 | #include <linux/hw_random.h> |
22 | #include <linux/bitops.h> |
23 | #include <linux/interrupt.h> |
24 | #include <linux/irqreturn.h> |
25 | |
26 | #define SP_MAX_NAME_LEN 32 |
27 | |
28 | #define CACHE_NONE 0x00 |
29 | #define CACHE_WB_NO_ALLOC 0xb7 |
30 | |
31 | #define PLATFORM_FEATURE_DBC 0x1 |
32 | |
33 | #define PSP_CAPABILITY(psp, cap) (psp->capability & PSP_CAPABILITY_##cap) |
34 | #define PSP_FEATURE(psp, feat) (psp->vdata && psp->vdata->platform_features & PLATFORM_FEATURE_##feat) |
35 | |
36 | /* Structure to hold CCP device data */ |
37 | struct ccp_device; |
38 | struct ccp_vdata { |
39 | const unsigned int version; |
40 | const unsigned int dma_chan_attr; |
41 | void (*setup)(struct ccp_device *); |
42 | const struct ccp_actions *perform; |
43 | const unsigned int offset; |
44 | const unsigned int rsamax; |
45 | }; |
46 | |
47 | struct sev_vdata { |
48 | const unsigned int cmdresp_reg; |
49 | const unsigned int cmdbuff_addr_lo_reg; |
50 | const unsigned int cmdbuff_addr_hi_reg; |
51 | }; |
52 | |
53 | struct tee_vdata { |
54 | const unsigned int cmdresp_reg; |
55 | const unsigned int cmdbuff_addr_lo_reg; |
56 | const unsigned int cmdbuff_addr_hi_reg; |
57 | const unsigned int ring_wptr_reg; |
58 | const unsigned int ring_rptr_reg; |
59 | const unsigned int info_reg; |
60 | }; |
61 | |
62 | struct platform_access_vdata { |
63 | const unsigned int cmdresp_reg; |
64 | const unsigned int cmdbuff_addr_lo_reg; |
65 | const unsigned int cmdbuff_addr_hi_reg; |
66 | const unsigned int doorbell_button_reg; |
67 | const unsigned int doorbell_cmd_reg; |
68 | |
69 | }; |
70 | |
71 | struct psp_vdata { |
72 | const struct sev_vdata *sev; |
73 | const struct tee_vdata *tee; |
74 | const struct platform_access_vdata *platform_access; |
75 | const unsigned int cmdresp_reg; |
76 | const unsigned int cmdbuff_addr_lo_reg; |
77 | const unsigned int cmdbuff_addr_hi_reg; |
78 | const unsigned int feature_reg; |
79 | const unsigned int inten_reg; |
80 | const unsigned int intsts_reg; |
81 | const unsigned int bootloader_info_reg; |
82 | const unsigned int platform_features; |
83 | }; |
84 | |
85 | /* Structure to hold SP device data */ |
86 | struct sp_dev_vdata { |
87 | const unsigned int bar; |
88 | |
89 | const struct ccp_vdata *ccp_vdata; |
90 | const struct psp_vdata *psp_vdata; |
91 | }; |
92 | |
93 | struct sp_device { |
94 | struct list_head entry; |
95 | |
96 | struct device *dev; |
97 | |
98 | struct sp_dev_vdata *dev_vdata; |
99 | unsigned int ord; |
100 | char name[SP_MAX_NAME_LEN]; |
101 | |
102 | /* Bus specific device information */ |
103 | void *dev_specific; |
104 | |
105 | /* I/O area used for device communication. */ |
106 | void __iomem *io_map; |
107 | |
108 | /* DMA caching attribute support */ |
109 | unsigned int axcache; |
110 | |
111 | /* get and set master device */ |
112 | struct sp_device*(*get_psp_master_device)(void); |
113 | void (*set_psp_master_device)(struct sp_device *); |
114 | void (*clear_psp_master_device)(struct sp_device *); |
115 | |
116 | bool irq_registered; |
117 | bool use_tasklet; |
118 | |
119 | unsigned int ccp_irq; |
120 | irq_handler_t ccp_irq_handler; |
121 | void *ccp_irq_data; |
122 | |
123 | unsigned int psp_irq; |
124 | irq_handler_t psp_irq_handler; |
125 | void *psp_irq_data; |
126 | |
127 | void *ccp_data; |
128 | void *psp_data; |
129 | }; |
130 | |
131 | int sp_pci_init(void); |
132 | void sp_pci_exit(void); |
133 | |
134 | int sp_platform_init(void); |
135 | void sp_platform_exit(void); |
136 | |
137 | struct sp_device *sp_alloc_struct(struct device *dev); |
138 | |
139 | int sp_init(struct sp_device *sp); |
140 | void sp_destroy(struct sp_device *sp); |
141 | struct sp_device *sp_get_master(void); |
142 | |
143 | int sp_suspend(struct sp_device *sp); |
144 | int sp_resume(struct sp_device *sp); |
145 | int sp_request_ccp_irq(struct sp_device *sp, irq_handler_t handler, |
146 | const char *name, void *data); |
147 | void sp_free_ccp_irq(struct sp_device *sp, void *data); |
148 | int sp_request_psp_irq(struct sp_device *sp, irq_handler_t handler, |
149 | const char *name, void *data); |
150 | void sp_free_psp_irq(struct sp_device *sp, void *data); |
151 | struct sp_device *sp_get_psp_master_device(void); |
152 | |
153 | #ifdef CONFIG_CRYPTO_DEV_SP_CCP |
154 | |
155 | int ccp_dev_init(struct sp_device *sp); |
156 | void ccp_dev_destroy(struct sp_device *sp); |
157 | |
158 | void ccp_dev_suspend(struct sp_device *sp); |
159 | void ccp_dev_resume(struct sp_device *sp); |
160 | |
161 | #else /* !CONFIG_CRYPTO_DEV_SP_CCP */ |
162 | |
163 | static inline int ccp_dev_init(struct sp_device *sp) |
164 | { |
165 | return 0; |
166 | } |
167 | static inline void ccp_dev_destroy(struct sp_device *sp) { } |
168 | static inline void ccp_dev_suspend(struct sp_device *sp) { } |
169 | static inline void ccp_dev_resume(struct sp_device *sp) { } |
170 | #endif /* CONFIG_CRYPTO_DEV_SP_CCP */ |
171 | |
172 | #ifdef CONFIG_CRYPTO_DEV_SP_PSP |
173 | |
174 | int psp_dev_init(struct sp_device *sp); |
175 | void psp_pci_init(void); |
176 | void psp_dev_destroy(struct sp_device *sp); |
177 | void psp_pci_exit(void); |
178 | |
179 | #else /* !CONFIG_CRYPTO_DEV_SP_PSP */ |
180 | |
181 | static inline int psp_dev_init(struct sp_device *sp) { return 0; } |
182 | static inline void psp_pci_init(void) { } |
183 | static inline void psp_dev_destroy(struct sp_device *sp) { } |
184 | static inline void psp_pci_exit(void) { } |
185 | |
186 | #endif /* CONFIG_CRYPTO_DEV_SP_PSP */ |
187 | |
188 | #endif |
189 | |