1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3 * AMD Secure Processor driver
4 *
5 * Copyright (C) 2017-2018 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 /* Structure to hold CCP device data */
32 struct ccp_device;
33 struct ccp_vdata {
34 const unsigned int version;
35 const unsigned int dma_chan_attr;
36 void (*setup)(struct ccp_device *);
37 const struct ccp_actions *perform;
38 const unsigned int offset;
39 const unsigned int rsamax;
40 };
41
42 struct psp_vdata {
43 const unsigned int cmdresp_reg;
44 const unsigned int cmdbuff_addr_lo_reg;
45 const unsigned int cmdbuff_addr_hi_reg;
46 const unsigned int feature_reg;
47 const unsigned int inten_reg;
48 const unsigned int intsts_reg;
49 };
50
51 /* Structure to hold SP device data */
52 struct sp_dev_vdata {
53 const unsigned int bar;
54
55 const struct ccp_vdata *ccp_vdata;
56 const struct psp_vdata *psp_vdata;
57 };
58
59 struct sp_device {
60 struct list_head entry;
61
62 struct device *dev;
63
64 struct sp_dev_vdata *dev_vdata;
65 unsigned int ord;
66 char name[SP_MAX_NAME_LEN];
67
68 /* Bus specific device information */
69 void *dev_specific;
70
71 /* I/O area used for device communication. */
72 void __iomem *io_map;
73
74 /* DMA caching attribute support */
75 unsigned int axcache;
76
77 /* get and set master device */
78 struct sp_device*(*get_psp_master_device)(void);
79 void (*set_psp_master_device)(struct sp_device *);
80
81 bool irq_registered;
82 bool use_tasklet;
83
84 unsigned int ccp_irq;
85 irq_handler_t ccp_irq_handler;
86 void *ccp_irq_data;
87
88 unsigned int psp_irq;
89 irq_handler_t psp_irq_handler;
90 void *psp_irq_data;
91
92 void *ccp_data;
93 void *psp_data;
94 };
95
96 int sp_pci_init(void);
97 void sp_pci_exit(void);
98
99 int sp_platform_init(void);
100 void sp_platform_exit(void);
101
102 struct sp_device *sp_alloc_struct(struct device *dev);
103
104 int sp_init(struct sp_device *sp);
105 void sp_destroy(struct sp_device *sp);
106 struct sp_device *sp_get_master(void);
107
108 int sp_suspend(struct sp_device *sp, pm_message_t state);
109 int sp_resume(struct sp_device *sp);
110 int sp_request_ccp_irq(struct sp_device *sp, irq_handler_t handler,
111 const char *name, void *data);
112 void sp_free_ccp_irq(struct sp_device *sp, void *data);
113 int sp_request_psp_irq(struct sp_device *sp, irq_handler_t handler,
114 const char *name, void *data);
115 void sp_free_psp_irq(struct sp_device *sp, void *data);
116 struct sp_device *sp_get_psp_master_device(void);
117
118 #ifdef CONFIG_CRYPTO_DEV_SP_CCP
119
120 int ccp_dev_init(struct sp_device *sp);
121 void ccp_dev_destroy(struct sp_device *sp);
122
123 int ccp_dev_suspend(struct sp_device *sp, pm_message_t state);
124 int ccp_dev_resume(struct sp_device *sp);
125
126 #else /* !CONFIG_CRYPTO_DEV_SP_CCP */
127
ccp_dev_init(struct sp_device * sp)128 static inline int ccp_dev_init(struct sp_device *sp)
129 {
130 return 0;
131 }
ccp_dev_destroy(struct sp_device * sp)132 static inline void ccp_dev_destroy(struct sp_device *sp) { }
133
ccp_dev_suspend(struct sp_device * sp,pm_message_t state)134 static inline int ccp_dev_suspend(struct sp_device *sp, pm_message_t state)
135 {
136 return 0;
137 }
ccp_dev_resume(struct sp_device * sp)138 static inline int ccp_dev_resume(struct sp_device *sp)
139 {
140 return 0;
141 }
142 #endif /* CONFIG_CRYPTO_DEV_SP_CCP */
143
144 #ifdef CONFIG_CRYPTO_DEV_SP_PSP
145
146 int psp_dev_init(struct sp_device *sp);
147 void psp_pci_init(void);
148 void psp_dev_destroy(struct sp_device *sp);
149 void psp_pci_exit(void);
150
151 #else /* !CONFIG_CRYPTO_DEV_SP_PSP */
152
psp_dev_init(struct sp_device * sp)153 static inline int psp_dev_init(struct sp_device *sp) { return 0; }
psp_pci_init(void)154 static inline void psp_pci_init(void) { }
psp_dev_destroy(struct sp_device * sp)155 static inline void psp_dev_destroy(struct sp_device *sp) { }
psp_pci_exit(void)156 static inline void psp_pci_exit(void) { }
157
158 #endif /* CONFIG_CRYPTO_DEV_SP_PSP */
159
160 #endif
161
