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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 psp_vdata {
57 const struct sev_vdata *sev;
58 const struct tee_vdata *tee;
59 const unsigned int feature_reg;
60 const unsigned int inten_reg;
61 const unsigned int intsts_reg;
62};
63
64/* Structure to hold SP device data */
65struct sp_dev_vdata {
66 const unsigned int bar;
67
68 const struct ccp_vdata *ccp_vdata;
69 const struct psp_vdata *psp_vdata;
70};
71
72struct sp_device {
73 struct list_head entry;
74
75 struct device *dev;
76
77 struct sp_dev_vdata *dev_vdata;
78 unsigned int ord;
79 char name[SP_MAX_NAME_LEN];
80
81 /* Bus specific device information */
82 void *dev_specific;
83
84 /* I/O area used for device communication. */
85 void __iomem *io_map;
86
87 /* DMA caching attribute support */
88 unsigned int axcache;
89
90 /* get and set master device */
91 struct sp_device*(*get_psp_master_device)(void);
92 void (*set_psp_master_device)(struct sp_device *);
93
94 bool irq_registered;
95 bool use_tasklet;
96
97 unsigned int ccp_irq;
98 irq_handler_t ccp_irq_handler;
99 void *ccp_irq_data;
100
101 unsigned int psp_irq;
102 irq_handler_t psp_irq_handler;
103 void *psp_irq_data;
104
105 void *ccp_data;
106 void *psp_data;
107};
108
109int sp_pci_init(void);
110void sp_pci_exit(void);
111
112int sp_platform_init(void);
113void sp_platform_exit(void);
114
115struct sp_device *sp_alloc_struct(struct device *dev);
116
117int sp_init(struct sp_device *sp);
118void sp_destroy(struct sp_device *sp);
119struct sp_device *sp_get_master(void);
120
121int sp_suspend(struct sp_device *sp, pm_message_t state);
122int sp_resume(struct sp_device *sp);
123int sp_request_ccp_irq(struct sp_device *sp, irq_handler_t handler,
124 const char *name, void *data);
125void sp_free_ccp_irq(struct sp_device *sp, void *data);
126int sp_request_psp_irq(struct sp_device *sp, irq_handler_t handler,
127 const char *name, void *data);
128void sp_free_psp_irq(struct sp_device *sp, void *data);
129struct sp_device *sp_get_psp_master_device(void);
130
131#ifdef CONFIG_CRYPTO_DEV_SP_CCP
132
133int ccp_dev_init(struct sp_device *sp);
134void ccp_dev_destroy(struct sp_device *sp);
135
136int ccp_dev_suspend(struct sp_device *sp, pm_message_t state);
137int ccp_dev_resume(struct sp_device *sp);
138
139#else /* !CONFIG_CRYPTO_DEV_SP_CCP */
140
141static inline int ccp_dev_init(struct sp_device *sp)
142{
143 return 0;
144}
145static inline void ccp_dev_destroy(struct sp_device *sp) { }
146
147static inline int ccp_dev_suspend(struct sp_device *sp, pm_message_t state)
148{
149 return 0;
150}
151static inline int ccp_dev_resume(struct sp_device *sp)
152{
153 return 0;
154}
155#endif /* CONFIG_CRYPTO_DEV_SP_CCP */
156
157#ifdef CONFIG_CRYPTO_DEV_SP_PSP
158
159int psp_dev_init(struct sp_device *sp);
160void psp_pci_init(void);
161void psp_dev_destroy(struct sp_device *sp);
162void psp_pci_exit(void);
163
164#else /* !CONFIG_CRYPTO_DEV_SP_PSP */
165
166static inline int psp_dev_init(struct sp_device *sp) { return 0; }
167static inline void psp_pci_init(void) { }
168static inline void psp_dev_destroy(struct sp_device *sp) { }
169static inline void psp_pci_exit(void) { }
170
171#endif /* CONFIG_CRYPTO_DEV_SP_PSP */
172
173#endif