1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * AMD Platform Security Processor (PSP) interface driver 4 * 5 * Copyright (C) 2017-2018 Advanced Micro Devices, Inc. 6 * 7 * Author: Brijesh Singh <brijesh.singh@amd.com> 8 */ 9 10 #ifndef __PSP_DEV_H__ 11 #define __PSP_DEV_H__ 12 13 #include <linux/device.h> 14 #include <linux/spinlock.h> 15 #include <linux/mutex.h> 16 #include <linux/list.h> 17 #include <linux/wait.h> 18 #include <linux/dmapool.h> 19 #include <linux/hw_random.h> 20 #include <linux/bitops.h> 21 #include <linux/interrupt.h> 22 #include <linux/irqreturn.h> 23 #include <linux/dmaengine.h> 24 #include <linux/psp-sev.h> 25 #include <linux/miscdevice.h> 26 27 #include "sp-dev.h" 28 29 #define PSP_CMD_COMPLETE BIT(1) 30 31 #define PSP_CMDRESP_CMD_SHIFT 16 32 #define PSP_CMDRESP_IOC BIT(0) 33 #define PSP_CMDRESP_RESP BIT(31) 34 #define PSP_CMDRESP_ERR_MASK 0xffff 35 36 #define MAX_PSP_NAME_LEN 16 37 38 struct sev_misc_dev { 39 struct kref refcount; 40 struct miscdevice misc; 41 }; 42 43 struct psp_device { 44 struct list_head entry; 45 46 struct psp_vdata *vdata; 47 char name[MAX_PSP_NAME_LEN]; 48 49 struct device *dev; 50 struct sp_device *sp; 51 52 void __iomem *io_regs; 53 54 int sev_state; 55 unsigned int sev_int_rcvd; 56 wait_queue_head_t sev_int_queue; 57 struct sev_misc_dev *sev_misc; 58 struct sev_user_data_status status_cmd_buf; 59 struct sev_data_init init_cmd_buf; 60 61 u8 api_major; 62 u8 api_minor; 63 u8 build; 64 }; 65 66 #endif /* __PSP_DEV_H */ 67