0470bb1b71
On some SOCs DBC is supported through the PSP mailbox instead of the platform mailbox. This capability is advertised in the PSP capabilities register. Allow using this communication path if supported. Signed-off-by: Mario Limonciello <mario.limonciello@amd.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
130 lines
3.5 KiB
C
130 lines
3.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* AMD Platform Security Processor (PSP) interface driver
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*
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* Copyright (C) 2017-2019 Advanced Micro Devices, Inc.
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*
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* Author: Brijesh Singh <brijesh.singh@amd.com>
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*/
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#ifndef __PSP_DEV_H__
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#define __PSP_DEV_H__
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#include <linux/device.h>
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#include <linux/list.h>
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#include <linux/bits.h>
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#include <linux/interrupt.h>
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#include <linux/mutex.h>
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#include <linux/psp.h>
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#include <linux/psp-platform-access.h>
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#include "sp-dev.h"
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#define MAX_PSP_NAME_LEN 16
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extern struct psp_device *psp_master;
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typedef void (*psp_irq_handler_t)(int, void *, unsigned int);
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struct psp_device {
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struct list_head entry;
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struct psp_vdata *vdata;
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char name[MAX_PSP_NAME_LEN];
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struct device *dev;
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struct sp_device *sp;
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void __iomem *io_regs;
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struct mutex mailbox_mutex;
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psp_irq_handler_t sev_irq_handler;
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void *sev_irq_data;
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void *sev_data;
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void *tee_data;
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void *platform_access_data;
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void *dbc_data;
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unsigned int capability;
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};
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void psp_set_sev_irq_handler(struct psp_device *psp, psp_irq_handler_t handler,
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void *data);
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void psp_clear_sev_irq_handler(struct psp_device *psp);
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struct psp_device *psp_get_master_device(void);
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#define PSP_CAPABILITY_SEV BIT(0)
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#define PSP_CAPABILITY_TEE BIT(1)
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#define PSP_CAPABILITY_DBC_THRU_EXT BIT(2)
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#define PSP_CAPABILITY_PSP_SECURITY_REPORTING BIT(7)
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#define PSP_CAPABILITY_PSP_SECURITY_OFFSET 8
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/*
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* The PSP doesn't directly store these bits in the capability register
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* but instead copies them from the results of query command.
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*
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* The offsets from the query command are below, and shifted when used.
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*/
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#define PSP_SECURITY_FUSED_PART BIT(0)
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#define PSP_SECURITY_DEBUG_LOCK_ON BIT(2)
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#define PSP_SECURITY_TSME_STATUS BIT(5)
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#define PSP_SECURITY_ANTI_ROLLBACK_STATUS BIT(7)
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#define PSP_SECURITY_RPMC_PRODUCTION_ENABLED BIT(8)
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#define PSP_SECURITY_RPMC_SPIROM_AVAILABLE BIT(9)
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#define PSP_SECURITY_HSP_TPM_AVAILABLE BIT(10)
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#define PSP_SECURITY_ROM_ARMOR_ENFORCED BIT(11)
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/**
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* enum psp_cmd - PSP mailbox commands
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* @PSP_CMD_TEE_RING_INIT: Initialize TEE ring buffer
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* @PSP_CMD_TEE_RING_DESTROY: Destroy TEE ring buffer
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* @PSP_CMD_TEE_EXTENDED_CMD: Extended command
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* @PSP_CMD_MAX: Maximum command id
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*/
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enum psp_cmd {
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PSP_CMD_TEE_RING_INIT = 1,
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PSP_CMD_TEE_RING_DESTROY = 2,
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PSP_CMD_TEE_EXTENDED_CMD = 14,
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PSP_CMD_MAX = 15,
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};
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int psp_mailbox_command(struct psp_device *psp, enum psp_cmd cmd, void *cmdbuff,
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unsigned int timeout_msecs, unsigned int *cmdresp);
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/**
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* struct psp_ext_req_buffer_hdr - Structure of the extended command header
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* @payload_size: total payload size
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* @sub_cmd_id: extended command ID
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* @status: status of command execution (out)
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*/
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struct psp_ext_req_buffer_hdr {
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u32 payload_size;
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u32 sub_cmd_id;
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u32 status;
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} __packed;
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struct psp_ext_request {
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struct psp_ext_req_buffer_hdr header;
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void *buf;
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} __packed;
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/**
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* enum psp_sub_cmd - PSP mailbox sub commands
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* @PSP_SUB_CMD_DBC_GET_NONCE: Get nonce from DBC
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* @PSP_SUB_CMD_DBC_SET_UID: Set UID for DBC
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* @PSP_SUB_CMD_DBC_GET_PARAMETER: Get parameter from DBC
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* @PSP_SUB_CMD_DBC_SET_PARAMETER: Set parameter for DBC
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*/
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enum psp_sub_cmd {
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PSP_SUB_CMD_DBC_GET_NONCE = PSP_DYNAMIC_BOOST_GET_NONCE,
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PSP_SUB_CMD_DBC_SET_UID = PSP_DYNAMIC_BOOST_SET_UID,
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PSP_SUB_CMD_DBC_GET_PARAMETER = PSP_DYNAMIC_BOOST_GET_PARAMETER,
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PSP_SUB_CMD_DBC_SET_PARAMETER = PSP_DYNAMIC_BOOST_SET_PARAMETER,
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};
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int psp_extended_mailbox_cmd(struct psp_device *psp, unsigned int timeout_msecs,
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struct psp_ext_request *req);
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#endif /* __PSP_DEV_H */
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