Linux kernel mirror (for testing)
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linux
1/*
2 * AMD Secure Processor driver
3 *
4 * Copyright (C) 2017 Advanced Micro Devices, Inc.
5 *
6 * Author: Tom Lendacky <thomas.lendacky@amd.com>
7 * Author: Gary R Hook <gary.hook@amd.com>
8 * Author: Brijesh Singh <brijesh.singh@amd.com>
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
13 */
14
15#ifndef __SP_DEV_H__
16#define __SP_DEV_H__
17
18#include <linux/device.h>
19#include <linux/pci.h>
20#include <linux/spinlock.h>
21#include <linux/mutex.h>
22#include <linux/list.h>
23#include <linux/wait.h>
24#include <linux/dmapool.h>
25#include <linux/hw_random.h>
26#include <linux/bitops.h>
27#include <linux/interrupt.h>
28#include <linux/irqreturn.h>
29
30#define SP_MAX_NAME_LEN 32
31
32#define CACHE_NONE 0x00
33#define CACHE_WB_NO_ALLOC 0xb7
34
35/* Structure to hold CCP device data */
36struct ccp_device;
37struct ccp_vdata {
38 const unsigned int version;
39 const unsigned int dma_chan_attr;
40 void (*setup)(struct ccp_device *);
41 const struct ccp_actions *perform;
42 const unsigned int offset;
43 const unsigned int rsamax;
44};
45/* Structure to hold SP device data */
46struct sp_dev_vdata {
47 const unsigned int bar;
48
49 const struct ccp_vdata *ccp_vdata;
50 void *psp_vdata;
51};
52
53struct sp_device {
54 struct list_head entry;
55
56 struct device *dev;
57
58 struct sp_dev_vdata *dev_vdata;
59 unsigned int ord;
60 char name[SP_MAX_NAME_LEN];
61
62 /* Bus specific device information */
63 void *dev_specific;
64
65 /* I/O area used for device communication. */
66 void __iomem *io_map;
67
68 /* DMA caching attribute support */
69 unsigned int axcache;
70
71 bool irq_registered;
72 bool use_tasklet;
73
74 unsigned int ccp_irq;
75 irq_handler_t ccp_irq_handler;
76 void *ccp_irq_data;
77
78 unsigned int psp_irq;
79 irq_handler_t psp_irq_handler;
80 void *psp_irq_data;
81
82 void *ccp_data;
83 void *psp_data;
84};
85
86int sp_pci_init(void);
87void sp_pci_exit(void);
88
89int sp_platform_init(void);
90void sp_platform_exit(void);
91
92struct sp_device *sp_alloc_struct(struct device *dev);
93
94int sp_init(struct sp_device *sp);
95void sp_destroy(struct sp_device *sp);
96struct sp_device *sp_get_master(void);
97
98int sp_suspend(struct sp_device *sp, pm_message_t state);
99int sp_resume(struct sp_device *sp);
100int sp_request_ccp_irq(struct sp_device *sp, irq_handler_t handler,
101 const char *name, void *data);
102void sp_free_ccp_irq(struct sp_device *sp, void *data);
103int sp_request_psp_irq(struct sp_device *sp, irq_handler_t handler,
104 const char *name, void *data);
105void sp_free_psp_irq(struct sp_device *sp, void *data);
106
107#ifdef CONFIG_CRYPTO_DEV_SP_CCP
108
109int ccp_dev_init(struct sp_device *sp);
110void ccp_dev_destroy(struct sp_device *sp);
111
112int ccp_dev_suspend(struct sp_device *sp, pm_message_t state);
113int ccp_dev_resume(struct sp_device *sp);
114
115#else /* !CONFIG_CRYPTO_DEV_SP_CCP */
116
117static inline int ccp_dev_init(struct sp_device *sp)
118{
119 return 0;
120}
121static inline void ccp_dev_destroy(struct sp_device *sp) { }
122
123static inline int ccp_dev_suspend(struct sp_device *sp, pm_message_t state)
124{
125 return 0;
126}
127static inline int ccp_dev_resume(struct sp_device *sp)
128{
129 return 0;
130}
131#endif /* CONFIG_CRYPTO_DEV_SP_CCP */
132
133#endif