f39ec261ad
No functional changes to the code are applied. Submitted by: Kornel Duleba <mindal@semihalf.com> Obtained from: Semihalf Sponsored by: Stormshield
192 lines
4.8 KiB
C
192 lines
4.8 KiB
C
/*-
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* Copyright (c) 2018 Stormshield.
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* Copyright (c) 2018 Semihalf.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _TPM20_H_
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#define _TPM20_H_
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/endian.h>
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/proc.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/callout.h>
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#include <sys/conf.h>
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#include <sys/module.h>
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#include <sys/rman.h>
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#include <sys/sx.h>
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#include <sys/uio.h>
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#include <machine/bus.h>
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#include <machine/md_var.h>
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#include <machine/resource.h>
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#include <contrib/dev/acpica/include/acpi.h>
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#include <contrib/dev/acpica/include/accommon.h>
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#include <dev/acpica/acpivar.h>
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#include "opt_acpi.h"
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#include "opt_tpm.h"
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#define BIT(x) (1 << (x))
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/* Timeouts in us */
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#define TPM_TIMEOUT_A 750000
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#define TPM_TIMEOUT_B 2000000
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#define TPM_TIMEOUT_C 200000
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#define TPM_TIMEOUT_D 30000
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/*
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* Generating RSA key pair takes ~(10-20s), which is significantly longer than
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* any timeout defined in spec. Because of that we need a new one.
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*/
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#define TPM_TIMEOUT_LONG 40000000
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/* List of commands that require TPM_TIMEOUT_LONG time to complete */
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#define TPM_CC_CreatePrimary 0x00000131
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#define TPM_CC_Create 0x00000153
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#define TPM_CC_CreateLoaded 0x00000191
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/* List of commands that require only TPM_TIMEOUT_C time to complete */
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#define TPM_CC_SequenceComplete 0x0000013e
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#define TPM_CC_Startup 0x00000144
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#define TPM_CC_SequenceUpdate 0x0000015c
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#define TPM_CC_GetCapability 0x0000017a
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#define TPM_CC_PCR_Extend 0x00000182
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#define TPM_CC_EventSequenceComplete 0x00000185
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#define TPM_CC_HashSequenceStart 0x00000186
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/* Timeout before data in read buffer is discarded */
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#define TPM_READ_TIMEOUT 500000
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#define TPM_BUFSIZE 0x1000
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#define TPM_HEADER_SIZE 10
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#define TPM_CDEV_NAME "tpm0"
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#define TPM_CDEV_PERM_FLAG 0600
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#define TPM2_START_METHOD_ACPI 2
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#define TPM2_START_METHOD_TIS 6
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#define TPM2_START_METHOD_CRB 7
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#define TPM2_START_METHOD_CRB_ACPI 8
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struct tpm_sc {
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device_t dev;
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struct resource *mem_res;
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struct resource *irq_res;
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int mem_rid;
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int irq_rid;
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struct cdev *sc_cdev;
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struct sx dev_lock;
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struct cv buf_cv;
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void *intr_cookie;
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int intr_type; /* Current event type */
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bool interrupts;
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uint8_t *buf;
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size_t pending_data_length;
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lwpid_t owner_tid;
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struct callout discard_buffer_callout;
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#ifdef TPM_HARVEST
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struct callout harvest_callout;
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int harvest_ticks;
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#endif
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int (*transmit)(struct tpm_sc *, size_t);
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};
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int tpm20_suspend(device_t dev);
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int tpm20_shutdown(device_t dev);
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int32_t tpm20_get_timeout(uint32_t command);
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int tpm20_init(struct tpm_sc *sc);
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void tpm20_release(struct tpm_sc *sc);
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/* Small helper routines for io ops */
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static inline uint8_t
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RD1(struct tpm_sc *sc, bus_size_t off)
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{
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return (bus_read_1(sc->mem_res, off));
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}
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static inline uint32_t
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RD4(struct tpm_sc *sc, bus_size_t off)
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{
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return (bus_read_4(sc->mem_res, off));
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}
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#ifdef __amd64__
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static inline uint64_t
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RD8(struct tpm_sc *sc, bus_size_t off)
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{
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return (bus_read_8(sc->mem_res, off));
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}
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#endif
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static inline void
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WR1(struct tpm_sc *sc, bus_size_t off, uint8_t val)
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{
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bus_write_1(sc->mem_res, off, val);
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}
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static inline void
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WR4(struct tpm_sc *sc, bus_size_t off, uint32_t val)
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{
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bus_write_4(sc->mem_res, off, val);
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}
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static inline void
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AND4(struct tpm_sc *sc, bus_size_t off, uint32_t val)
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{
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WR4(sc, off, RD4(sc, off) & val);
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}
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static inline void
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OR1(struct tpm_sc *sc, bus_size_t off, uint8_t val)
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{
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WR1(sc, off, RD1(sc, off) | val);
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}
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static inline void
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OR4(struct tpm_sc *sc, bus_size_t off, uint32_t val)
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{
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WR4(sc, off, RD4(sc, off) | val);
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}
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#endif /* _TPM20_H_ */
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