1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * AMD Secure Processor driver
5 * Copyright (C) 2017-2018 Advanced Micro Devices, Inc.
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>
15 #include <linux/device.h>
16 #include <linux/pci.h>
17 #include <linux/spinlock.h>
18 #include <linux/mutex.h>
19 #include <linux/list.h>
20 #include <linux/wait.h>
21 #include <linux/dmapool.h>
22 #include <linux/hw_random.h>
23 #include <linux/bitops.h>
24 #include <linux/interrupt.h>
25 #include <linux/irqreturn.h>
27 #define SP_MAX_NAME_LEN 32
29 #define CACHE_NONE 0x00
30 #define CACHE_WB_NO_ALLOC 0xb7
32 /* Structure to hold CCP device data */
35 const unsigned int version
;
36 const unsigned int dma_chan_attr
;
37 void (*setup
)(struct ccp_device
*);
38 const struct ccp_actions
*perform
;
39 const unsigned int offset
;
40 const unsigned int rsamax
;
44 const unsigned int cmdresp_reg
;
45 const unsigned int cmdbuff_addr_lo_reg
;
46 const unsigned int cmdbuff_addr_hi_reg
;
47 const unsigned int feature_reg
;
48 const unsigned int inten_reg
;
49 const unsigned int intsts_reg
;
52 /* Structure to hold SP device data */
54 const unsigned int bar
;
56 const struct ccp_vdata
*ccp_vdata
;
57 const struct psp_vdata
*psp_vdata
;
61 struct list_head entry
;
65 struct sp_dev_vdata
*dev_vdata
;
67 char name
[SP_MAX_NAME_LEN
];
69 /* Bus specific device information */
72 /* I/O area used for device communication. */
75 /* DMA caching attribute support */
78 /* get and set master device */
79 struct sp_device
*(*get_psp_master_device
)(void);
80 void (*set_psp_master_device
)(struct sp_device
*);
86 irq_handler_t ccp_irq_handler
;
90 irq_handler_t psp_irq_handler
;
97 int sp_pci_init(void);
98 void sp_pci_exit(void);
100 int sp_platform_init(void);
101 void sp_platform_exit(void);
103 struct sp_device
*sp_alloc_struct(struct device
*dev
);
105 int sp_init(struct sp_device
*sp
);
106 void sp_destroy(struct sp_device
*sp
);
107 struct sp_device
*sp_get_master(void);
109 int sp_suspend(struct sp_device
*sp
, pm_message_t state
);
110 int sp_resume(struct sp_device
*sp
);
111 int sp_request_ccp_irq(struct sp_device
*sp
, irq_handler_t handler
,
112 const char *name
, void *data
);
113 void sp_free_ccp_irq(struct sp_device
*sp
, void *data
);
114 int sp_request_psp_irq(struct sp_device
*sp
, irq_handler_t handler
,
115 const char *name
, void *data
);
116 void sp_free_psp_irq(struct sp_device
*sp
, void *data
);
117 struct sp_device
*sp_get_psp_master_device(void);
119 #ifdef CONFIG_CRYPTO_DEV_SP_CCP
121 int ccp_dev_init(struct sp_device
*sp
);
122 void ccp_dev_destroy(struct sp_device
*sp
);
124 int ccp_dev_suspend(struct sp_device
*sp
, pm_message_t state
);
125 int ccp_dev_resume(struct sp_device
*sp
);
127 #else /* !CONFIG_CRYPTO_DEV_SP_CCP */
129 static inline int ccp_dev_init(struct sp_device
*sp
)
133 static inline void ccp_dev_destroy(struct sp_device
*sp
) { }
135 static inline int ccp_dev_suspend(struct sp_device
*sp
, pm_message_t state
)
139 static inline int ccp_dev_resume(struct sp_device
*sp
)
143 #endif /* CONFIG_CRYPTO_DEV_SP_CCP */
145 #ifdef CONFIG_CRYPTO_DEV_SP_PSP
147 int psp_dev_init(struct sp_device
*sp
);
148 void psp_pci_init(void);
149 void psp_dev_destroy(struct sp_device
*sp
);
150 void psp_pci_exit(void);
152 #else /* !CONFIG_CRYPTO_DEV_SP_PSP */
154 static inline int psp_dev_init(struct sp_device
*sp
) { return 0; }
155 static inline void psp_pci_init(void) { }
156 static inline void psp_dev_destroy(struct sp_device
*sp
) { }
157 static inline void psp_pci_exit(void) { }
159 #endif /* CONFIG_CRYPTO_DEV_SP_PSP */