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[FreeBSD/FreeBSD.git] / sys / dev / tpm / tpm20.h
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
99 #define TPM2_START_METHOD_ACPI          2
100 #define TPM2_START_METHOD_TIS           6
101 #define TPM2_START_METHOD_CRB           7
102 #define TPM2_START_METHOD_CRB_ACPI      8
103
104 struct tpm_sc {
105         device_t        dev;
106
107         struct resource *mem_res;
108         struct resource *irq_res;
109         int             mem_rid;
110         int             irq_rid;
111
112         struct cdev     *sc_cdev;
113
114         struct sx       dev_lock;
115         struct cv       buf_cv;
116
117         void            *intr_cookie;
118         int             intr_type;      /* Current event type */
119         bool            interrupts;
120
121         uint8_t         *buf;
122         size_t          pending_data_length;
123         lwpid_t         owner_tid;
124
125         struct callout  discard_buffer_callout;
126 #ifdef TPM_HARVEST
127         struct callout  harvest_callout;
128         int             harvest_ticks;
129 #endif
130
131         int             (*transmit)(struct tpm_sc *, size_t);
132 };
133
134 int tpm20_suspend(device_t dev);
135 int tpm20_shutdown(device_t dev);
136 int32_t tpm20_get_timeout(uint32_t command);
137 int tpm20_init(struct tpm_sc *sc);
138 void tpm20_release(struct tpm_sc *sc);
139
140 /* Small helper routines for io ops */
141 static inline uint8_t
142 RD1(struct tpm_sc *sc, bus_size_t off)
143 {
144
145         return (bus_read_1(sc->mem_res, off));
146 }
147 static inline uint32_t
148 RD4(struct tpm_sc *sc, bus_size_t off)
149 {
150
151         return (bus_read_4(sc->mem_res, off));
152 }
153 #ifdef __amd64__
154 static inline uint64_t
155 RD8(struct tpm_sc *sc, bus_size_t off)
156 {
157
158         return (bus_read_8(sc->mem_res, off));
159 }
160 #endif
161 static inline void
162 WR1(struct tpm_sc *sc, bus_size_t off, uint8_t val)
163 {
164
165         bus_write_1(sc->mem_res, off, val);
166 }
167 static inline void
168 WR4(struct tpm_sc *sc, bus_size_t off, uint32_t val)
169 {
170
171         bus_write_4(sc->mem_res, off, val);
172 }
173 static inline void
174 AND4(struct tpm_sc *sc, bus_size_t off, uint32_t val)
175 {
176
177         WR4(sc, off, RD4(sc, off) & val);
178 }
179 static inline void
180 OR1(struct tpm_sc *sc, bus_size_t off, uint8_t val)
181 {
182
183         WR1(sc, off, RD1(sc, off) | val);
184 }
185 static inline void
186 OR4(struct tpm_sc *sc, bus_size_t off, uint32_t val)
187 {
188
189         WR4(sc, off, RD4(sc, off) | val);
190 }
191 #endif  /* _TPM20_H_ */