| 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 sev_user_data_status sev_plat_status; |
| 63 | |
| 64 | struct sev_user_data_snp_status snp_plat_status; |
| 65 | struct snp_feature_info snp_feat_info_0; |
| 66 | |
| 67 | struct tsm_dev *tsmdev; |
| 68 | struct sev_tio_status *tio_status; |
| 69 | }; |
| 70 | |
| 71 | int sev_dev_init(struct psp_device *psp); |
| 72 | void sev_dev_destroy(struct psp_device *psp); |
| 73 | |
| 74 | int __sev_do_cmd_locked(int cmd, void *data, int *psp_ret); |
| 75 | |
| 76 | void sev_pci_init(void); |
| 77 | void sev_pci_exit(void); |
| 78 | |
| 79 | struct page *snp_alloc_hv_fixed_pages(unsigned int num_2mb_pages); |
| 80 | void snp_free_hv_fixed_pages(struct page *page); |
| 81 | |
| 82 | void sev_tsm_init_locked(struct sev_device *sev, void *tio_status_page); |
| 83 | void sev_tsm_uninit(struct sev_device *sev); |
| 84 | int sev_tio_cmd_buffer_len(int cmd); |
| 85 | |
| 86 | #endif /* __SEV_DEV_H */ |
| 87 |