1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * AMD Platform Security Processor (PSP) interface driver 4 * 5 * Copyright (C) 2017-2019 Advanced Micro Devices, Inc. 6 * 7 * Author: Brijesh Singh <brijesh.singh@amd.com> 8 */ 9 10 #ifndef __SEV_DEV_H__ 11 #define __SEV_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 #include <linux/capability.h> 27 28 #define SEV_CMDRESP_CMD GENMASK(26, 16) 29 #define SEV_CMD_COMPLETE BIT(1) 30 #define SEV_CMDRESP_IOC BIT(0) 31 32 struct sev_misc_dev { 33 struct kref refcount; 34 struct miscdevice misc; 35 }; 36 37 struct sev_device { 38 struct device *dev; 39 struct psp_device *psp; 40 41 void __iomem *io_regs; 42 43 struct sev_vdata *vdata; 44 45 int state; 46 unsigned int int_rcvd; 47 wait_queue_head_t int_queue; 48 struct sev_misc_dev *misc; 49 50 u8 api_major; 51 u8 api_minor; 52 u8 build; 53 54 void *cmd_buf; 55 void *cmd_buf_backup; 56 bool cmd_buf_active; 57 bool cmd_buf_backup_active; 58 59 bool snp_initialized; 60 }; 61 62 int sev_dev_init(struct psp_device *psp); 63 void sev_dev_destroy(struct psp_device *psp); 64 65 void sev_pci_init(void); 66 void sev_pci_exit(void); 67 68 #endif /* __SEV_DEV_H */ 69