drivers/crypto/ccp/sev-dev.h

   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 */