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/* SPDX-License-Identifier: GPL-2.0-only */ /* * AMD Platform Security Processor (PSP) interface driver * * Copyright (C) 2017-2019 Advanced Micro Devices, Inc. * * Author: Brijesh Singh <brijesh.singh@amd.com> */ #ifndef __SEV_DEV_H__ #define __SEV_DEV_H__ #include <linux/device.h> #include <linux/spinlock.h> #include <linux/mutex.h> #include <linux/list.h> #include <linux/wait.h> #include <linux/dmapool.h> #include <linux/hw_random.h> #include <linux/bitops.h> #include <linux/interrupt.h> #include <linux/irqreturn.h> #include <linux/dmaengine.h> #include <linux/psp-sev.h> #include <linux/miscdevice.h> #include <linux/capability.h> #define SEV_CMDRESP_CMD GENMASK(26, 16) #define SEV_CMD_COMPLETE BIT(1) #define SEV_CMDRESP_IOC BIT(0) struct sev_misc_dev { struct kref refcount; struct miscdevice misc; }; struct sev_tio_status; struct sev_device { struct device *dev; struct psp_device *psp; void __iomem *io_regs; struct sev_vdata *vdata; unsigned int int_rcvd; wait_queue_head_t int_queue; struct sev_misc_dev *misc; u8 api_major; u8 api_minor; u8 build; void *cmd_buf; void *cmd_buf_backup; bool cmd_buf_active; bool cmd_buf_backup_active; bool snp_initialized; struct kobject *sev_kobj; struct kobject *verify_mit; struct sev_user_data_status sev_plat_status; struct sev_user_data_snp_status snp_plat_status; struct snp_feature_info snp_feat_info_0; struct tsm_dev *tsmdev; struct sev_tio_status *tio_status; }; int sev_dev_init(struct psp_device *psp); void sev_dev_destroy(struct psp_device *psp); int __sev_do_cmd_locked(int cmd, void *data, int *psp_ret); void sev_pci_init(void); void sev_pci_exit(void); struct page *snp_alloc_hv_fixed_pages(unsigned int num_2mb_pages); void snp_free_hv_fixed_pages(struct page *page); void sev_tsm_init_locked(struct sev_device *sev, void *tio_status_page); void sev_tsm_uninit(struct sev_device *sev); int sev_tio_cmd_buffer_len(int cmd); #endif /* __SEV_DEV_H */
