tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * AMD Platform Security Processor (PSP) interface driver
3 *
4 * Copyright (C) 2017 Advanced Micro Devices, Inc.
5 *
6 * Author: Brijesh Singh <brijesh.singh@amd.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 */
12
13#ifndef __PSP_DEV_H__
14#define __PSP_DEV_H__
15
16#include <linux/device.h>
17#include <linux/pci.h>
18#include <linux/spinlock.h>
19#include <linux/mutex.h>
20#include <linux/list.h>
21#include <linux/wait.h>
22#include <linux/dmapool.h>
23#include <linux/hw_random.h>
24#include <linux/bitops.h>
25#include <linux/interrupt.h>
26#include <linux/irqreturn.h>
27#include <linux/dmaengine.h>
28#include <linux/psp-sev.h>
29#include <linux/miscdevice.h>
30
31#include "sp-dev.h"
32
33#define PSP_C2PMSG(_num) ((_num) << 2)
34#define PSP_CMDRESP PSP_C2PMSG(32)
35#define PSP_CMDBUFF_ADDR_LO PSP_C2PMSG(56)
36#define PSP_CMDBUFF_ADDR_HI PSP_C2PMSG(57)
37#define PSP_FEATURE_REG PSP_C2PMSG(63)
38
39#define PSP_P2CMSG(_num) ((_num) << 2)
40#define PSP_CMD_COMPLETE_REG 1
41#define PSP_CMD_COMPLETE PSP_P2CMSG(PSP_CMD_COMPLETE_REG)
42
43#define PSP_P2CMSG_INTEN 0x0110
44#define PSP_P2CMSG_INTSTS 0x0114
45
46#define PSP_C2PMSG_ATTR_0 0x0118
47#define PSP_C2PMSG_ATTR_1 0x011c
48#define PSP_C2PMSG_ATTR_2 0x0120
49#define PSP_C2PMSG_ATTR_3 0x0124
50#define PSP_P2CMSG_ATTR_0 0x0128
51
52#define PSP_CMDRESP_CMD_SHIFT 16
53#define PSP_CMDRESP_IOC BIT(0)
54#define PSP_CMDRESP_RESP BIT(31)
55#define PSP_CMDRESP_ERR_MASK 0xffff
56
57#define MAX_PSP_NAME_LEN 16
58
59struct sev_misc_dev {
60 struct kref refcount;
61 struct miscdevice misc;
62};
63
64struct psp_device {
65 struct list_head entry;
66
67 struct psp_vdata *vdata;
68 char name[MAX_PSP_NAME_LEN];
69
70 struct device *dev;
71 struct sp_device *sp;
72
73 void __iomem *io_regs;
74
75 int sev_state;
76 unsigned int sev_int_rcvd;
77 wait_queue_head_t sev_int_queue;
78 struct sev_misc_dev *sev_misc;
79 struct sev_user_data_status status_cmd_buf;
80 struct sev_data_init init_cmd_buf;
81};
82
83#endif /* __PSP_DEV_H */