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_tio_status; 38 39 struct sev_device { 40 struct device *dev; 41 struct psp_device *psp; 42 43 void __iomem *io_regs; 44 45 struct sev_vdata *vdata; 46 47 unsigned int int_rcvd; 48 wait_queue_head_t int_queue; 49 struct sev_misc_dev *misc; 50 51 u8 api_major; 52 u8 api_minor; 53 u8 build; 54 55 void *cmd_buf; 56 void *cmd_buf_backup; 57 bool cmd_buf_active; 58 bool cmd_buf_backup_active; 59 60 bool snp_initialized; 61 62 struct kobject *sev_kobj; 63 struct kobject *verify_mit; 64 65 struct sev_user_data_status sev_plat_status; 66 67 struct sev_user_data_snp_status snp_plat_status; 68 struct snp_feature_info snp_feat_info_0; 69 70 struct tsm_dev *tsmdev; 71 struct sev_tio_status *tio_status; 72 }; 73 74 int sev_dev_init(struct psp_device *psp); 75 void sev_dev_destroy(struct psp_device *psp); 76 77 int __sev_do_cmd_locked(int cmd, void *data, int *psp_ret); 78 79 void sev_pci_init(void); 80 void sev_pci_exit(void); 81 82 struct page *snp_alloc_hv_fixed_pages(unsigned int num_2mb_pages); 83 void snp_free_hv_fixed_pages(struct page *page); 84 85 void sev_tsm_init_locked(struct sev_device *sev, void *tio_status_page); 86 void sev_tsm_uninit(struct sev_device *sev); 87 int sev_tio_cmd_buffer_len(int cmd); 88 89 #endif /* __SEV_DEV_H */ 90