xref: /openbmc/qemu/hw/tpm/tpm_tis.h (revision 6eedbb5b)
1 /*
2  * tpm_tis.h - QEMU's TPM TIS common header
3  *
4  * Copyright (C) 2006,2010-2013 IBM Corporation
5  *
6  * Authors:
7  *  Stefan Berger <stefanb@us.ibm.com>
8  *  David Safford <safford@us.ibm.com>
9  *
10  * Xen 4 support: Andrease Niederl <andreas.niederl@iaik.tugraz.at>
11  *
12  * This work is licensed under the terms of the GNU GPL, version 2 or later.
13  * See the COPYING file in the top-level directory.
14  *
15  * Implementation of the TIS interface according to specs found at
16  * http://www.trustedcomputinggroup.org. This implementation currently
17  * supports version 1.3, 21 March 2013
18  * In the developers menu choose the PC Client section then find the TIS
19  * specification.
20  *
21  * TPM TIS for TPM 2 implementation following TCG PC Client Platform
22  * TPM Profile (PTP) Specification, Family 2.0, Revision 00.43
23  */
24 #ifndef TPM_TPM_TIS_H
25 #define TPM_TPM_TIS_H
26 
27 #include "sysemu/tpm_backend.h"
28 #include "tpm_ppi.h"
29 
30 #define TPM_TIS_NUM_LOCALITIES      5     /* per spec */
31 #define TPM_TIS_LOCALITY_SHIFT      12
32 #define TPM_TIS_NO_LOCALITY         0xff
33 
34 #define TPM_TIS_IS_VALID_LOCTY(x)   ((x) < TPM_TIS_NUM_LOCALITIES)
35 
36 #define TPM_TIS_BUFFER_MAX          4096
37 
38 typedef enum {
39     TPM_TIS_STATE_IDLE = 0,
40     TPM_TIS_STATE_READY,
41     TPM_TIS_STATE_COMPLETION,
42     TPM_TIS_STATE_EXECUTION,
43     TPM_TIS_STATE_RECEPTION,
44 } TPMTISState;
45 
46 /* locality data  -- all fields are persisted */
47 typedef struct TPMLocality {
48     TPMTISState state;
49     uint8_t access;
50     uint32_t sts;
51     uint32_t iface_id;
52     uint32_t inte;
53     uint32_t ints;
54 } TPMLocality;
55 
56 typedef struct TPMState {
57     MemoryRegion mmio;
58 
59     unsigned char buffer[TPM_TIS_BUFFER_MAX];
60     uint16_t rw_offset;
61 
62     uint8_t active_locty;
63     uint8_t aborting_locty;
64     uint8_t next_locty;
65 
66     TPMLocality loc[TPM_TIS_NUM_LOCALITIES];
67 
68     qemu_irq irq;
69     uint32_t irq_num;
70 
71     TPMBackendCmd cmd;
72 
73     TPMBackend *be_driver;
74     TPMVersion be_tpm_version;
75 
76     size_t be_buffer_size;
77 
78     bool ppi_enabled;
79     TPMPPI ppi;
80 } TPMState;
81 
82 extern const VMStateDescription vmstate_locty;
83 extern const MemoryRegionOps tpm_tis_memory_ops;
84 
85 int tpm_tis_pre_save(TPMState *s);
86 void tpm_tis_reset(TPMState *s);
87 enum TPMVersion tpm_tis_get_tpm_version(TPMState *s);
88 void tpm_tis_request_completed(TPMState *s, int ret);
89 uint32_t tpm_tis_read_data(TPMState *s, hwaddr addr, unsigned size);
90 void tpm_tis_write_data(TPMState *s, hwaddr addr, uint64_t val, uint32_t size);
91 uint16_t tpm_tis_get_checksum(TPMState *s);
92 
93 #endif /* TPM_TPM_TIS_H */
94