drivers/crypto/ccp/psp-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 <[email protected]>
   8  */
   9
  10 #ifndef __PSP_DEV_H__
  11 #define __PSP_DEV_H__
  12
  13 #include <linux/device.h>
  14 #include <linux/list.h>
  15 #include <linux/bits.h>
  16 #include <linux/interrupt.h>
  17 #include <linux/mutex.h>
  18 #include <linux/psp.h>
  19 #include <linux/psp-platform-access.h>
  20
  21 #include "sp-dev.h"
  22
  23 #define MAX_PSP_NAME_LEN                16
  24
  25 extern struct psp_device *psp_master;
  26
  27 typedef void (*psp_irq_handler_t)(int, void *, unsigned int);
  28
  29 union psp_cap_register {
  30         unsigned int raw;
  31         struct {
  32                 unsigned int sev                        :1,
  33                              tee                        :1,
  34                              dbc_thru_ext               :1,
  35                              rsvd1                      :4,
  36                              security_reporting         :1,
  37                              fused_part                 :1,
  38                              rsvd2                      :1,
  39                              debug_lock_on              :1,
  40                              rsvd3                      :2,
  41                              tsme_status                :1,
  42                              rsvd4                      :1,
  43                              anti_rollback_status       :1,
  44                              rpmc_production_enabled    :1,
  45                              rpmc_spirom_available      :1,
  46                              hsp_tpm_available          :1,
  47                              rom_armor_enforced         :1,
  48                              rsvd5                      :12;
  49         };
  50 };
  51
  52 struct psp_device {
  53         struct list_head entry;
  54
  55         struct psp_vdata *vdata;
  56         char name[MAX_PSP_NAME_LEN];
  57
  58         struct device *dev;
  59         struct sp_device *sp;
  60
  61         void __iomem *io_regs;
  62         struct mutex mailbox_mutex;
  63
  64         psp_irq_handler_t sev_irq_handler;
  65         void *sev_irq_data;
  66
  67         void *sev_data;
  68         void *tee_data;
  69         void *platform_access_data;
  70         void *dbc_data;
  71
  72         union psp_cap_register capability;
  73 };
  74
  75 void psp_set_sev_irq_handler(struct psp_device *psp, psp_irq_handler_t handler,
  76                              void *data);
  77 void psp_clear_sev_irq_handler(struct psp_device *psp);
  78
  79 struct psp_device *psp_get_master_device(void);
  80
  81 /**
  82  * enum psp_cmd - PSP mailbox commands
  83  * @PSP_CMD_TEE_RING_INIT:      Initialize TEE ring buffer
  84  * @PSP_CMD_TEE_RING_DESTROY:   Destroy TEE ring buffer
  85  * @PSP_CMD_TEE_EXTENDED_CMD:   Extended command
  86  * @PSP_CMD_MAX:                Maximum command id
  87  */
  88 enum psp_cmd {
  89         PSP_CMD_TEE_RING_INIT           = 1,
  90         PSP_CMD_TEE_RING_DESTROY        = 2,
  91         PSP_CMD_TEE_EXTENDED_CMD        = 14,
  92         PSP_CMD_MAX                     = 15,
  93 };
  94
  95 int psp_mailbox_command(struct psp_device *psp, enum psp_cmd cmd, void *cmdbuff,
  96                         unsigned int timeout_msecs, unsigned int *cmdresp);
  97
  98 /**
  99  * struct psp_ext_req_buffer_hdr - Structure of the extended command header
 100  * @payload_size: total payload size
 101  * @sub_cmd_id: extended command ID
 102  * @status: status of command execution (out)
 103  */
 104 struct psp_ext_req_buffer_hdr {
 105         u32 payload_size;
 106         u32 sub_cmd_id;
 107         u32 status;
 108 } __packed;
 109
 110 struct psp_ext_request {
 111         struct psp_ext_req_buffer_hdr header;
 112         void *buf;
 113 } __packed;
 114
 115 /**
 116  * enum psp_sub_cmd - PSP mailbox sub commands
 117  * @PSP_SUB_CMD_DBC_GET_NONCE:          Get nonce from DBC
 118  * @PSP_SUB_CMD_DBC_SET_UID:            Set UID for DBC
 119  * @PSP_SUB_CMD_DBC_GET_PARAMETER:      Get parameter from DBC
 120  * @PSP_SUB_CMD_DBC_SET_PARAMETER:      Set parameter for DBC
 121  */
 122 enum psp_sub_cmd {
 123         PSP_SUB_CMD_DBC_GET_NONCE       = PSP_DYNAMIC_BOOST_GET_NONCE,
 124         PSP_SUB_CMD_DBC_SET_UID         = PSP_DYNAMIC_BOOST_SET_UID,
 125         PSP_SUB_CMD_DBC_GET_PARAMETER   = PSP_DYNAMIC_BOOST_GET_PARAMETER,
 126         PSP_SUB_CMD_DBC_SET_PARAMETER   = PSP_DYNAMIC_BOOST_SET_PARAMETER,
 127 };
 128
 129 int psp_extended_mailbox_cmd(struct psp_device *psp, unsigned int timeout_msecs,
 130                              struct psp_ext_request *req);
 131 #endif /* __PSP_DEV_H */