1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * AMD Secure Processor driver
5 * Copyright (C) 2017-2019 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/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>
26 #define SP_MAX_NAME_LEN 32
28 #define CACHE_NONE 0x00
29 #define CACHE_WB_NO_ALLOC 0xb7
31 /* Structure to hold CCP device data */
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;
43 const unsigned int cmdresp_reg;
44 const unsigned int cmdbuff_addr_lo_reg;
45 const unsigned int cmdbuff_addr_hi_reg;
49 const unsigned int cmdresp_reg;
50 const unsigned int cmdbuff_addr_lo_reg;
51 const unsigned int cmdbuff_addr_hi_reg;
52 const unsigned int ring_wptr_reg;
53 const unsigned int ring_rptr_reg;
56 struct platform_access_vdata {
57 const unsigned int cmdresp_reg;
58 const unsigned int cmdbuff_addr_lo_reg;
59 const unsigned int cmdbuff_addr_hi_reg;
60 const unsigned int doorbell_button_reg;
61 const unsigned int doorbell_cmd_reg;
66 const struct sev_vdata *sev;
67 const struct tee_vdata *tee;
68 const struct platform_access_vdata *platform_access;
69 const unsigned int feature_reg;
70 const unsigned int inten_reg;
71 const unsigned int intsts_reg;
74 /* Structure to hold SP device data */
76 const unsigned int bar;
78 const struct ccp_vdata *ccp_vdata;
79 const struct psp_vdata *psp_vdata;
83 struct list_head entry;
87 struct sp_dev_vdata *dev_vdata;
89 char name[SP_MAX_NAME_LEN];
91 /* Bus specific device information */
94 /* I/O area used for device communication. */
97 /* DMA caching attribute support */
100 /* get and set master device */
101 struct sp_device*(*get_psp_master_device)(void);
102 void (*set_psp_master_device)(struct sp_device *);
103 void (*clear_psp_master_device)(struct sp_device *);
108 unsigned int ccp_irq;
109 irq_handler_t ccp_irq_handler;
112 unsigned int psp_irq;
113 irq_handler_t psp_irq_handler;
120 int sp_pci_init(void);
121 void sp_pci_exit(void);
123 int sp_platform_init(void);
124 void sp_platform_exit(void);
126 struct sp_device *sp_alloc_struct(struct device *dev);
128 int sp_init(struct sp_device *sp);
129 void sp_destroy(struct sp_device *sp);
130 struct sp_device *sp_get_master(void);
132 int sp_suspend(struct sp_device *sp);
133 int sp_resume(struct sp_device *sp);
134 int sp_request_ccp_irq(struct sp_device *sp, irq_handler_t handler,
135 const char *name, void *data);
136 void sp_free_ccp_irq(struct sp_device *sp, void *data);
137 int sp_request_psp_irq(struct sp_device *sp, irq_handler_t handler,
138 const char *name, void *data);
139 void sp_free_psp_irq(struct sp_device *sp, void *data);
140 struct sp_device *sp_get_psp_master_device(void);
142 #ifdef CONFIG_CRYPTO_DEV_SP_CCP
144 int ccp_dev_init(struct sp_device *sp);
145 void ccp_dev_destroy(struct sp_device *sp);
147 void ccp_dev_suspend(struct sp_device *sp);
148 void ccp_dev_resume(struct sp_device *sp);
150 #else /* !CONFIG_CRYPTO_DEV_SP_CCP */
152 static inline int ccp_dev_init(struct sp_device *sp)
156 static inline void ccp_dev_destroy(struct sp_device *sp) { }
157 static inline void ccp_dev_suspend(struct sp_device *sp) { }
158 static inline void ccp_dev_resume(struct sp_device *sp) { }
159 #endif /* CONFIG_CRYPTO_DEV_SP_CCP */
161 #ifdef CONFIG_CRYPTO_DEV_SP_PSP
163 int psp_dev_init(struct sp_device *sp);
164 void psp_pci_init(void);
165 void psp_dev_destroy(struct sp_device *sp);
166 void psp_pci_exit(void);
168 #else /* !CONFIG_CRYPTO_DEV_SP_PSP */
170 static inline int psp_dev_init(struct sp_device *sp) { return 0; }
171 static inline void psp_pci_init(void) { }
172 static inline void psp_dev_destroy(struct sp_device *sp) { }
173 static inline void psp_pci_exit(void) { }
175 #endif /* CONFIG_CRYPTO_DEV_SP_PSP */