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/*-
* Copyright (c) 2018 Stormshield.
* Copyright (c) 2018 Semihalf.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _TPM20_H_
#define _TPM20_H_
#include "opt_acpi.h"
#include <sys/cdefs.h>
#include <sys/endian.h>
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/proc.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/callout.h>
#include <sys/conf.h>
#include <sys/lock.h>
#include <sys/module.h>
#include <sys/rman.h>
#include <sys/sx.h>
#include <sys/taskqueue.h>
#include <sys/uio.h>
#include <machine/bus.h>
#include <machine/md_var.h>
#include <machine/resource.h>
#ifdef DEV_ACPI
#include <contrib/dev/acpica/include/acpi.h>
#include <contrib/dev/acpica/include/accommon.h>
#include <dev/acpica/acpivar.h>
#endif
#include "opt_tpm.h"
#include "tpm_if.h"
#define BIT(x) (1 << (x))
/* Timeouts in us */
#define TPM_TIMEOUT_A 750000
#define TPM_TIMEOUT_B 2000000
#define TPM_TIMEOUT_C 200000
#define TPM_TIMEOUT_D 30000
/*
* Generating RSA key pair takes ~(10-20s), which is significantly longer than
* any timeout defined in spec. Because of that we need a new one.
*/
#define TPM_TIMEOUT_LONG 40000000
/* List of commands that require TPM_TIMEOUT_LONG time to complete */
#define TPM_CC_CreatePrimary 0x00000131
#define TPM_CC_Create 0x00000153
#define TPM_CC_CreateLoaded 0x00000191
/* List of commands that require only TPM_TIMEOUT_C time to complete */
#define TPM_CC_SequenceComplete 0x0000013e
#define TPM_CC_Startup 0x00000144
#define TPM_CC_SequenceUpdate 0x0000015c
#define TPM_CC_GetCapability 0x0000017a
#define TPM_CC_PCR_Extend 0x00000182
#define TPM_CC_EventSequenceComplete 0x00000185
#define TPM_CC_HashSequenceStart 0x00000186
/* Timeout before data in read buffer is discarded */
#define TPM_READ_TIMEOUT 500000
#define TPM_BUFSIZE 0x1000
#define TPM_HEADER_SIZE 10
#define TPM_CDEV_NAME "tpm0"
#define TPM_CDEV_PERM_FLAG 0600
#define TPM2_START_METHOD_ACPI 2
#define TPM2_START_METHOD_TIS 6
#define TPM2_START_METHOD_CRB 7
#define TPM2_START_METHOD_CRB_ACPI 8
MALLOC_DECLARE(M_TPM20);
struct tpm_sc {
device_t dev;
struct resource *mem_res;
struct resource *irq_res;
int mem_rid;
int irq_rid;
struct cdev *sc_cdev;
struct sx dev_lock;
struct cv buf_cv;
void *intr_cookie;
int intr_type; /* Current event type */
bool interrupts;
uint8_t *buf;
size_t pending_data_length;
lwpid_t owner_tid;
struct callout discard_buffer_callout;
#ifdef TPM_HARVEST
struct timeout_task harvest_task;
#endif
int (*transmit)(struct tpm_sc *, size_t);
};
int tpm20_suspend(device_t dev);
int tpm20_shutdown(device_t dev);
int32_t tpm20_get_timeout(uint32_t command);
int tpm20_init(struct tpm_sc *sc);
void tpm20_release(struct tpm_sc *sc);
/* Mode driver types */
DECLARE_CLASS(tpmtis_driver);
int tpmtis_attach(device_t dev);
DECLARE_CLASS(tpmcrb_driver);
/* Bus driver types */
DECLARE_CLASS(tpm_bus_driver);
DECLARE_CLASS(tpm_spi_driver);
/* Small helper routines for io ops */
static inline void
AND4(struct tpm_sc *sc, bus_size_t off, uint32_t val)
{
uint32_t v = TPM_READ_4(sc->dev, off);
TPM_WRITE_4(sc->dev, off, v & val);
}
static inline void
OR1(struct tpm_sc *sc, bus_size_t off, uint8_t val)
{
uint8_t v = TPM_READ_1(sc->dev, off);
TPM_WRITE_1(sc->dev, off, v | val);
}
static inline void
OR4(struct tpm_sc *sc, bus_size_t off, uint32_t val)
{
uint32_t v = TPM_READ_1(sc->dev, off);
TPM_WRITE_4(sc->dev, off, v | val);
}
#endif /* _TPM20_H_ */
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