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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/* Structure to hold CCP device data */
32struct ccp_device;
33struct 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
42struct sev_vdata {
43 const unsigned int cmdresp_reg;
44 const unsigned int cmdbuff_addr_lo_reg;
45 const unsigned int cmdbuff_addr_hi_reg;
46};
47
48struct tee_vdata {
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;
54};
55
56struct 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;
62
63};
64
65struct psp_vdata {
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;
72};
73
74/* Structure to hold SP device data */
75struct sp_dev_vdata {
76 const unsigned int bar;
77
78 const struct ccp_vdata *ccp_vdata;
79 const struct psp_vdata *psp_vdata;
80};
81
82struct sp_device {
83 struct list_head entry;
84
85 struct device *dev;
86
87 struct sp_dev_vdata *dev_vdata;
88 unsigned int ord;
89 char name[SP_MAX_NAME_LEN];
90
91 /* Bus specific device information */
92 void *dev_specific;
93
94 /* I/O area used for device communication. */
95 void __iomem *io_map;
96
97 /* DMA caching attribute support */
98 unsigned int axcache;
99
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 *);
104
105 bool irq_registered;
106 bool use_tasklet;
107
108 unsigned int ccp_irq;
109 irq_handler_t ccp_irq_handler;
110 void *ccp_irq_data;
111
112 unsigned int psp_irq;
113 irq_handler_t psp_irq_handler;
114 void *psp_irq_data;
115
116 void *ccp_data;
117 void *psp_data;
118};
119
120int sp_pci_init(void);
121void sp_pci_exit(void);
122
123int sp_platform_init(void);
124void sp_platform_exit(void);
125
126struct sp_device *sp_alloc_struct(struct device *dev);
127
128int sp_init(struct sp_device *sp);
129void sp_destroy(struct sp_device *sp);
130struct sp_device *sp_get_master(void);
131
132int sp_suspend(struct sp_device *sp);
133int sp_resume(struct sp_device *sp);
134int sp_request_ccp_irq(struct sp_device *sp, irq_handler_t handler,
135 const char *name, void *data);
136void sp_free_ccp_irq(struct sp_device *sp, void *data);
137int sp_request_psp_irq(struct sp_device *sp, irq_handler_t handler,
138 const char *name, void *data);
139void sp_free_psp_irq(struct sp_device *sp, void *data);
140struct sp_device *sp_get_psp_master_device(void);
141
142#ifdef CONFIG_CRYPTO_DEV_SP_CCP
143
144int ccp_dev_init(struct sp_device *sp);
145void ccp_dev_destroy(struct sp_device *sp);
146
147void ccp_dev_suspend(struct sp_device *sp);
148void ccp_dev_resume(struct sp_device *sp);
149
150#else /* !CONFIG_CRYPTO_DEV_SP_CCP */
151
152static inline int ccp_dev_init(struct sp_device *sp)
153{
154 return 0;
155}
156static inline void ccp_dev_destroy(struct sp_device *sp) { }
157static inline void ccp_dev_suspend(struct sp_device *sp) { }
158static inline void ccp_dev_resume(struct sp_device *sp) { }
159#endif /* CONFIG_CRYPTO_DEV_SP_CCP */
160
161#ifdef CONFIG_CRYPTO_DEV_SP_PSP
162
163int psp_dev_init(struct sp_device *sp);
164void psp_pci_init(void);
165void psp_dev_destroy(struct sp_device *sp);
166void psp_pci_exit(void);
167
168#else /* !CONFIG_CRYPTO_DEV_SP_PSP */
169
170static inline int psp_dev_init(struct sp_device *sp) { return 0; }
171static inline void psp_pci_init(void) { }
172static inline void psp_dev_destroy(struct sp_device *sp) { }
173static inline void psp_pci_exit(void) { }
174
175#endif /* CONFIG_CRYPTO_DEV_SP_PSP */
176
177#endif