1 /*- 2 * Copyright (c) 2018 Stormshield. 3 * Copyright (c) 2018 Semihalf. 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 17 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 18 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, 19 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 20 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 23 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 24 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 25 * POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #ifndef _TPM20_H_ 29 #define _TPM20_H_ 30 31 #include <sys/cdefs.h> 32 __FBSDID("$FreeBSD$"); 33 34 #include <sys/endian.h> 35 #include <sys/param.h> 36 #include <sys/kernel.h> 37 #include <sys/malloc.h> 38 #include <sys/proc.h> 39 #include <sys/systm.h> 40 41 #include <sys/bus.h> 42 #include <sys/callout.h> 43 #include <sys/conf.h> 44 #include <sys/module.h> 45 #include <sys/rman.h> 46 #include <sys/sx.h> 47 #include <sys/uio.h> 48 49 #include <machine/bus.h> 50 #include <machine/md_var.h> 51 #include <machine/resource.h> 52 53 #include <contrib/dev/acpica/include/acpi.h> 54 #include <contrib/dev/acpica/include/accommon.h> 55 #include <dev/acpica/acpivar.h> 56 #include "opt_acpi.h" 57 58 #include "opt_tpm.h" 59 60 #define BIT(x) (1 << (x)) 61 62 /* Timeouts in us */ 63 #define TPM_TIMEOUT_A 750000 64 #define TPM_TIMEOUT_B 2000000 65 #define TPM_TIMEOUT_C 200000 66 #define TPM_TIMEOUT_D 30000 67 68 /* 69 * Generating RSA key pair takes ~(10-20s), which is significantly longer than 70 * any timeout defined in spec. Because of that we need a new one. 71 */ 72 #define TPM_TIMEOUT_LONG 40000000 73 74 /* List of commands that require TPM_TIMEOUT_LONG time to complete */ 75 #define TPM_CC_CreatePrimary 0x00000131 76 #define TPM_CC_Create 0x00000153 77 #define TPM_CC_CreateLoaded 0x00000191 78 79 /* List of commands that require only TPM_TIMEOUT_C time to complete */ 80 #define TPM_CC_SequenceComplete 0x0000013e 81 #define TPM_CC_Startup 0x00000144 82 #define TPM_CC_SequenceUpdate 0x0000015c 83 #define TPM_CC_GetCapability 0x0000017a 84 #define TPM_CC_PCR_Extend 0x00000182 85 #define TPM_CC_EventSequenceComplete 0x00000185 86 #define TPM_CC_HashSequenceStart 0x00000186 87 88 /* Timeout before data in read buffer is discarded */ 89 #define TPM_READ_TIMEOUT 500000 90 91 #define TPM_BUFSIZE 0x1000 92 93 #define TPM_HEADER_SIZE 10 94 95 #define TPM_CDEV_NAME "tpm0" 96 #define TPM_CDEV_PERM_FLAG 0600 97 98 #define TPM2_START_METHOD_ACPI 2 99 #define TPM2_START_METHOD_TIS 6 100 #define TPM2_START_METHOD_CRB 7 101 #define TPM2_START_METHOD_CRB_ACPI 8 102 103 MALLOC_DECLARE(M_TPM20); 104 105 struct tpm_sc { 106 device_t dev; 107 108 struct resource *mem_res; 109 struct resource *irq_res; 110 int mem_rid; 111 int irq_rid; 112 113 struct cdev *sc_cdev; 114 115 struct sx dev_lock; 116 struct cv buf_cv; 117 118 void *intr_cookie; 119 int intr_type; /* Current event type */ 120 bool interrupts; 121 122 uint8_t *buf; 123 size_t pending_data_length; 124 lwpid_t owner_tid; 125 126 struct callout discard_buffer_callout; 127 #ifdef TPM_HARVEST 128 struct callout harvest_callout; 129 int harvest_ticks; 130 #endif 131 132 int (*transmit)(struct tpm_sc *, size_t); 133 }; 134 135 int tpm20_suspend(device_t dev); 136 int tpm20_shutdown(device_t dev); 137 int32_t tpm20_get_timeout(uint32_t command); 138 int tpm20_init(struct tpm_sc *sc); 139 void tpm20_release(struct tpm_sc *sc); 140 141 /* Small helper routines for io ops */ 142 static inline uint8_t 143 RD1(struct tpm_sc *sc, bus_size_t off) 144 { 145 146 return (bus_read_1(sc->mem_res, off)); 147 } 148 static inline uint32_t 149 RD4(struct tpm_sc *sc, bus_size_t off) 150 { 151 152 return (bus_read_4(sc->mem_res, off)); 153 } 154 #ifdef __amd64__ 155 static inline uint64_t 156 RD8(struct tpm_sc *sc, bus_size_t off) 157 { 158 159 return (bus_read_8(sc->mem_res, off)); 160 } 161 #endif 162 static inline void 163 WR1(struct tpm_sc *sc, bus_size_t off, uint8_t val) 164 { 165 166 bus_write_1(sc->mem_res, off, val); 167 } 168 static inline void 169 WR4(struct tpm_sc *sc, bus_size_t off, uint32_t val) 170 { 171 172 bus_write_4(sc->mem_res, off, val); 173 } 174 static inline void 175 AND4(struct tpm_sc *sc, bus_size_t off, uint32_t val) 176 { 177 178 WR4(sc, off, RD4(sc, off) & val); 179 } 180 static inline void 181 OR1(struct tpm_sc *sc, bus_size_t off, uint8_t val) 182 { 183 184 WR1(sc, off, RD1(sc, off) | val); 185 } 186 static inline void 187 OR4(struct tpm_sc *sc, bus_size_t off, uint32_t val) 188 { 189 190 WR4(sc, off, RD4(sc, off) | val); 191 } 192 #endif /* _TPM20_H_ */ 193