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qemu/include/hw/acpi/tpm.h
Ninad Palsule bbadfb2e0a tpm: Extend common APIs to support TPM TIS I2C 
Qemu already supports devices attached to ISA and sysbus. This drop adds
support for the I2C bus attached TPM devices.

This commit includes changes for the common code.
- Added support for the new checksum registers which are required for
  the I2C support. The checksum calculation is handled in the qemu
  common code.
- Added wrapper function for read and write data so that I2C code can
  call it without MMIO interface.

The TPM TIS I2C spec describes in the table in section "Interface Locality
Usage per Register" that the TPM_INT_ENABLE and TPM_INT_STATUS registers
must be writable for any locality even if the locality is not the active
locality. Therefore, remove the checks whether the writing locality is the
active locality for these registers.

Signed-off-by: Ninad Palsule <ninad@linux.ibm.com>
Signed-off-by: Stefan Berger <stefanb@linux.ibm.com>
Reviewed-by: Stefan Berger <stefanb@linux.ibm.com>
Tested-by: Stefan Berger <stefanb@linux.ibm.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Joel Stanley <joel@jms.id.au>
Tested-by: Joel Stanley <joel@jms.id.au>
Message-id: 20230414220754.1191476-3-ninadpalsule@us.ibm.com
2023-04-20 08:17:15 -04:00

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/*
* tpm.h - TPM ACPI definitions
*
* Copyright (C) 2014 IBM Corporation
*
* Authors:
* Stefan Berger <stefanb@us.ibm.com>
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*
* Implementation of the TIS interface according to specs found at
* http://www.trustedcomputinggroup.org
*
*/
#ifndef HW_ACPI_TPM_H
#define HW_ACPI_TPM_H
#include "qemu/units.h"
#include "hw/registerfields.h"
#include "hw/acpi/aml-build.h"
#include "sysemu/tpm.h"
#ifdef CONFIG_TPM
#define TPM_TIS_ADDR_BASE 0xFED40000
#define TPM_TIS_ADDR_SIZE 0x5000
#define TPM_TIS_IRQ 5
#define TPM_TIS_NUM_LOCALITIES 5 /* per spec */
#define TPM_TIS_LOCALITY_SHIFT 12
/* tis registers */
#define TPM_TIS_REG_ACCESS 0x00
#define TPM_TIS_REG_INT_ENABLE 0x08
#define TPM_TIS_REG_INT_VECTOR 0x0c
#define TPM_TIS_REG_INT_STATUS 0x10
#define TPM_TIS_REG_INTF_CAPABILITY 0x14
#define TPM_TIS_REG_STS 0x18
#define TPM_TIS_REG_DATA_FIFO 0x24
#define TPM_TIS_REG_INTERFACE_ID 0x30
#define TPM_TIS_REG_DATA_XFIFO 0x80
#define TPM_TIS_REG_DATA_XFIFO_END 0xbc
#define TPM_TIS_REG_DID_VID 0xf00
#define TPM_TIS_REG_RID 0xf04
/* vendor-specific registers */
#define TPM_TIS_REG_DEBUG 0xf90
#define TPM_TIS_STS_TPM_FAMILY_MASK (0x3 << 26)/* TPM 2.0 */
#define TPM_TIS_STS_TPM_FAMILY1_2 (0 << 26) /* TPM 2.0 */
#define TPM_TIS_STS_TPM_FAMILY2_0 (1 << 26) /* TPM 2.0 */
#define TPM_TIS_STS_RESET_ESTABLISHMENT_BIT (1 << 25) /* TPM 2.0 */
#define TPM_TIS_STS_COMMAND_CANCEL (1 << 24) /* TPM 2.0 */
#define TPM_TIS_STS_VALID (1 << 7)
#define TPM_TIS_STS_COMMAND_READY (1 << 6)
#define TPM_TIS_STS_TPM_GO (1 << 5)
#define TPM_TIS_STS_DATA_AVAILABLE (1 << 4)
#define TPM_TIS_STS_EXPECT (1 << 3)
#define TPM_TIS_STS_SELFTEST_DONE (1 << 2)
#define TPM_TIS_STS_RESPONSE_RETRY (1 << 1)
#define TPM_TIS_BURST_COUNT_SHIFT 8
#define TPM_TIS_BURST_COUNT(X) \
((X) << TPM_TIS_BURST_COUNT_SHIFT)
#define TPM_TIS_ACCESS_TPM_REG_VALID_STS (1 << 7)
#define TPM_TIS_ACCESS_ACTIVE_LOCALITY (1 << 5)
#define TPM_TIS_ACCESS_BEEN_SEIZED (1 << 4)
#define TPM_TIS_ACCESS_SEIZE (1 << 3)
#define TPM_TIS_ACCESS_PENDING_REQUEST (1 << 2)
#define TPM_TIS_ACCESS_REQUEST_USE (1 << 1)
#define TPM_TIS_ACCESS_TPM_ESTABLISHMENT (1 << 0)
#define TPM_TIS_INT_ENABLED (1 << 31)
#define TPM_TIS_INT_DATA_AVAILABLE (1 << 0)
#define TPM_TIS_INT_STS_VALID (1 << 1)
#define TPM_TIS_INT_LOCALITY_CHANGED (1 << 2)
#define TPM_TIS_INT_COMMAND_READY (1 << 7)
#define TPM_TIS_INT_POLARITY_MASK (3 << 3)
#define TPM_TIS_INT_POLARITY_LOW_LEVEL (1 << 3)
#define TPM_TIS_INTERRUPTS_SUPPORTED (TPM_TIS_INT_LOCALITY_CHANGED | \
TPM_TIS_INT_DATA_AVAILABLE | \
TPM_TIS_INT_STS_VALID | \
TPM_TIS_INT_COMMAND_READY)
#define TPM_TIS_CAP_INTERFACE_VERSION1_3 (2 << 28)
#define TPM_TIS_CAP_INTERFACE_VERSION1_3_FOR_TPM2_0 (3 << 28)
#define TPM_TIS_CAP_DATA_TRANSFER_64B (3 << 9)
#define TPM_TIS_CAP_DATA_TRANSFER_LEGACY (0 << 9)
#define TPM_TIS_CAP_BURST_COUNT_DYNAMIC (0 << 8)
#define TPM_TIS_CAP_BURST_COUNT_STATIC (1 << 8)
#define TPM_TIS_CAP_INTERRUPT_LOW_LEVEL (1 << 4) /* support is mandatory */
#define TPM_TIS_CAPABILITIES_SUPPORTED1_3 \
(TPM_TIS_CAP_INTERRUPT_LOW_LEVEL | \
TPM_TIS_CAP_BURST_COUNT_DYNAMIC | \
TPM_TIS_CAP_DATA_TRANSFER_64B | \
TPM_TIS_CAP_INTERFACE_VERSION1_3 | \
TPM_TIS_INTERRUPTS_SUPPORTED)
#define TPM_TIS_CAPABILITIES_SUPPORTED2_0 \
(TPM_TIS_CAP_INTERRUPT_LOW_LEVEL | \
TPM_TIS_CAP_BURST_COUNT_DYNAMIC | \
TPM_TIS_CAP_DATA_TRANSFER_64B | \
TPM_TIS_CAP_INTERFACE_VERSION1_3_FOR_TPM2_0 | \
TPM_TIS_INTERRUPTS_SUPPORTED)
#define TPM_TIS_IFACE_ID_INTERFACE_TIS1_3 (0xf) /* TPM 2.0 */
#define TPM_TIS_IFACE_ID_INTERFACE_FIFO (0x0) /* TPM 2.0 */
#define TPM_TIS_IFACE_ID_INTERFACE_VER_FIFO (0 << 4) /* TPM 2.0 */
#define TPM_TIS_IFACE_ID_CAP_5_LOCALITIES (1 << 8) /* TPM 2.0 */
#define TPM_TIS_IFACE_ID_CAP_TIS_SUPPORTED (1 << 13) /* TPM 2.0 */
#define TPM_TIS_IFACE_ID_INT_SEL_LOCK (1 << 19) /* TPM 2.0 */
#define TPM_TIS_IFACE_ID_SUPPORTED_FLAGS1_3 \
(TPM_TIS_IFACE_ID_INTERFACE_TIS1_3 | \
(~0u << 4)/* all of it is don't care */)
/* if backend was a TPM 2.0: */
#define TPM_TIS_IFACE_ID_SUPPORTED_FLAGS2_0 \
(TPM_TIS_IFACE_ID_INTERFACE_FIFO | \
TPM_TIS_IFACE_ID_INTERFACE_VER_FIFO | \
TPM_TIS_IFACE_ID_CAP_5_LOCALITIES | \
TPM_TIS_IFACE_ID_CAP_TIS_SUPPORTED)
#define TPM_TIS_TPM_DID 0x0001
#define TPM_TIS_TPM_VID PCI_VENDOR_ID_IBM
#define TPM_TIS_TPM_RID 0x0001
#define TPM_TIS_NO_DATA_BYTE 0xff
REG32(CRB_LOC_STATE, 0x00)
FIELD(CRB_LOC_STATE, tpmEstablished, 0, 1)
FIELD(CRB_LOC_STATE, locAssigned, 1, 1)
FIELD(CRB_LOC_STATE, activeLocality, 2, 3)
FIELD(CRB_LOC_STATE, reserved, 5, 2)
FIELD(CRB_LOC_STATE, tpmRegValidSts, 7, 1)
REG32(CRB_LOC_CTRL, 0x08)
REG32(CRB_LOC_STS, 0x0C)
FIELD(CRB_LOC_STS, Granted, 0, 1)
FIELD(CRB_LOC_STS, beenSeized, 1, 1)
REG32(CRB_INTF_ID, 0x30)
FIELD(CRB_INTF_ID, InterfaceType, 0, 4)
FIELD(CRB_INTF_ID, InterfaceVersion, 4, 4)
FIELD(CRB_INTF_ID, CapLocality, 8, 1)
FIELD(CRB_INTF_ID, CapCRBIdleBypass, 9, 1)
FIELD(CRB_INTF_ID, Reserved1, 10, 1)
FIELD(CRB_INTF_ID, CapDataXferSizeSupport, 11, 2)
FIELD(CRB_INTF_ID, CapFIFO, 13, 1)
FIELD(CRB_INTF_ID, CapCRB, 14, 1)
FIELD(CRB_INTF_ID, CapIFRes, 15, 2)
FIELD(CRB_INTF_ID, InterfaceSelector, 17, 2)
FIELD(CRB_INTF_ID, IntfSelLock, 19, 1)
FIELD(CRB_INTF_ID, Reserved2, 20, 4)
FIELD(CRB_INTF_ID, RID, 24, 8)
REG32(CRB_INTF_ID2, 0x34)
FIELD(CRB_INTF_ID2, VID, 0, 16)
FIELD(CRB_INTF_ID2, DID, 16, 16)
REG32(CRB_CTRL_EXT, 0x38)
REG32(CRB_CTRL_REQ, 0x40)
REG32(CRB_CTRL_STS, 0x44)
FIELD(CRB_CTRL_STS, tpmSts, 0, 1)
FIELD(CRB_CTRL_STS, tpmIdle, 1, 1)
REG32(CRB_CTRL_CANCEL, 0x48)
REG32(CRB_CTRL_START, 0x4C)
REG32(CRB_INT_ENABLED, 0x50)
REG32(CRB_INT_STS, 0x54)
REG32(CRB_CTRL_CMD_SIZE, 0x58)
REG32(CRB_CTRL_CMD_LADDR, 0x5C)
REG32(CRB_CTRL_CMD_HADDR, 0x60)
REG32(CRB_CTRL_RSP_SIZE, 0x64)
REG32(CRB_CTRL_RSP_ADDR, 0x68)
REG32(CRB_DATA_BUFFER, 0x80)
#define TPM_CRB_ADDR_BASE 0xFED40000
#define TPM_CRB_ADDR_SIZE 0x1000
#define TPM_CRB_ADDR_CTRL (TPM_CRB_ADDR_BASE + A_CRB_CTRL_REQ)
#define TPM_CRB_R_MAX R_CRB_DATA_BUFFER
#define TPM_LOG_AREA_MINIMUM_SIZE (64 * KiB)
#define TPM_TCPA_ACPI_CLASS_CLIENT 0
#define TPM_TCPA_ACPI_CLASS_SERVER 1
#define TPM2_ACPI_CLASS_CLIENT 0
#define TPM2_ACPI_CLASS_SERVER 1
#define TPM2_START_METHOD_MMIO 6
#define TPM2_START_METHOD_CRB 7
/*
* Physical Presence Interface
*/
#define TPM_PPI_ADDR_SIZE 0x400
#define TPM_PPI_ADDR_BASE 0xFED45000
#define TPM_PPI_VERSION_NONE 0
#define TPM_PPI_VERSION_1_30 1
/* whether function is blocked by BIOS settings; bits 0, 1, 2 */
#define TPM_PPI_FUNC_NOT_IMPLEMENTED (0 << 0)
#define TPM_PPI_FUNC_BIOS_ONLY (1 << 0)
#define TPM_PPI_FUNC_BLOCKED (2 << 0)
#define TPM_PPI_FUNC_ALLOWED_USR_REQ (3 << 0)
#define TPM_PPI_FUNC_ALLOWED_USR_NOT_REQ (4 << 0)
#define TPM_PPI_FUNC_MASK (7 << 0)
/* TPM TIS I2C registers */
#define TPM_I2C_REG_LOC_SEL 0x00
#define TPM_I2C_REG_ACCESS 0x04
#define TPM_I2C_REG_INT_ENABLE 0x08
#define TPM_I2C_REG_INT_CAPABILITY 0x14
#define TPM_I2C_REG_STS 0x18
#define TPM_I2C_REG_DATA_FIFO 0x24
#define TPM_I2C_REG_INTF_CAPABILITY 0x30
#define TPM_I2C_REG_I2C_DEV_ADDRESS 0x38
#define TPM_I2C_REG_DATA_CSUM_ENABLE 0x40
#define TPM_I2C_REG_DATA_CSUM_GET 0x44
#define TPM_I2C_REG_DID_VID 0x48
#define TPM_I2C_REG_RID 0x4c
#define TPM_I2C_REG_UNKNOWN 0xff
/* I2C specific interface capabilities */
#define TPM_I2C_CAP_INTERFACE_TYPE (0x2 << 0) /* FIFO interface */
#define TPM_I2C_CAP_INTERFACE_VER (0x0 << 4) /* TCG I2C intf 1.0 */
#define TPM_I2C_CAP_TPM2_FAMILY (0x1 << 7) /* TPM 2.0 family. */
#define TPM_I2C_CAP_DEV_ADDR_CHANGE (0x0 << 27) /* No dev addr chng */
#define TPM_I2C_CAP_BURST_COUNT_STATIC (0x1 << 29) /* Burst count static */
#define TPM_I2C_CAP_LOCALITY_CAP (0x1 << 25) /* 0-5 locality */
#define TPM_I2C_CAP_BUS_SPEED (3 << 21) /* std and fast mode */
/*
* TPM_I2C_STS masks for read/writing bits from/to TIS
* TPM_STS mask for read bits 31:26 must be zero
*/
#define TPM_I2C_STS_READ_MASK 0x00ffffdd
#define TPM_I2C_STS_WRITE_MASK 0x03000062
/* Checksum enabled. */
#define TPM_DATA_CSUM_ENABLED 0x1
/*
* TPM_I2C_INT_ENABLE mask. Linux kernel does not support
* interrupts hence setting it to 0.
*/
#define TPM_I2C_INT_ENABLE_MASK 0x0
void tpm_build_ppi_acpi(TPMIf *tpm, Aml *dev);
#endif /* CONFIG_TPM */
#endif /* HW_ACPI_TPM_H */
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