xref: /openbmc/linux/tools/crypto/ccp/dbc_cli.py (revision f40d42f1)
1#!/usr/bin/python3
2# SPDX-License-Identifier: GPL-2.0
3import argparse
4import binascii
5import os
6import errno
7from dbc import *
8
9ERRORS = {
10    errno.EACCES: "Access is denied",
11    errno.E2BIG: "Excess data provided",
12    errno.EINVAL: "Bad parameters",
13    errno.EAGAIN: "Bad state",
14    errno.ENOENT: "Not implemented or message failure",
15    errno.EBUSY: "Busy",
16    errno.ENFILE: "Overflow",
17    errno.EPERM: "Signature invalid",
18}
19
20messages = {
21    "get-fmax-cap": PARAM_GET_FMAX_CAP,
22    "set-fmax-cap": PARAM_SET_FMAX_CAP,
23    "get-power-cap": PARAM_GET_PWR_CAP,
24    "set-power-cap": PARAM_SET_PWR_CAP,
25    "get-graphics-mode": PARAM_GET_GFX_MODE,
26    "set-graphics-mode": PARAM_SET_GFX_MODE,
27    "get-current-temp": PARAM_GET_CURR_TEMP,
28    "get-fmax-max": PARAM_GET_FMAX_MAX,
29    "get-fmax-min": PARAM_GET_FMAX_MIN,
30    "get-soc-power-max": PARAM_GET_SOC_PWR_MAX,
31    "get-soc-power-min": PARAM_GET_SOC_PWR_MIN,
32    "get-soc-power-cur": PARAM_GET_SOC_PWR_CUR,
33}
34
35
36def _pretty_buffer(ba):
37    return str(binascii.hexlify(ba, " "))
38
39
40def parse_args():
41    parser = argparse.ArgumentParser(
42        description="Dynamic Boost control command line interface"
43    )
44    parser.add_argument(
45        "command",
46        choices=["get-nonce", "get-param", "set-param", "set-uid"],
47        help="Command to send",
48    )
49    parser.add_argument("--device", default="/dev/dbc", help="Device to operate")
50    parser.add_argument("--signature", help="File containing signature for command")
51    parser.add_argument("--message", choices=messages.keys(), help="Message index")
52    parser.add_argument("--data", help="Argument to pass to message")
53    parser.add_argument("--uid", help="File containing UID to pass")
54    return parser.parse_args()
55
56
57def pretty_error(code):
58    if code in ERRORS:
59        print(ERRORS[code])
60    else:
61        print("failed with return code %d" % code)
62
63
64if __name__ == "__main__":
65    args = parse_args()
66    data = 0
67    sig = None
68    uid = None
69    if not os.path.exists(args.device):
70        raise IOError("Missing device {device}".format(device=args.device))
71    if args.signature:
72        if not os.path.exists(args.signature):
73            raise ValueError("Invalid signature file %s" % args.signature)
74        with open(args.signature, "rb") as f:
75            sig = f.read()
76        if len(sig) != DBC_SIG_SIZE:
77            raise ValueError(
78                "Invalid signature length %d (expected %d)" % (len(sig), DBC_SIG_SIZE)
79            )
80    if args.uid:
81        if not os.path.exists(args.uid):
82            raise ValueError("Invalid uid file %s" % args.uid)
83        with open(args.uid, "rb") as f:
84            uid = f.read()
85        if len(uid) != DBC_UID_SIZE:
86            raise ValueError(
87                "Invalid UID length %d (expected %d)" % (len(uid), DBC_UID_SIZE)
88            )
89    if args.data:
90        try:
91            data = int(args.data, 10)
92        except ValueError:
93            data = int(args.data, 16)
94
95    with open(args.device) as d:
96        if args.command == "get-nonce":
97            try:
98                nonce = get_nonce(d, sig)
99                print("Nonce: %s" % _pretty_buffer(bytes(nonce)))
100            except OSError as e:
101                pretty_error(e.errno)
102        elif args.command == "set-uid":
103            try:
104                result = set_uid(d, uid, sig)
105                if result:
106                    print("Set UID")
107            except OSError as e:
108                pretty_error(e.errno)
109        elif args.command == "get-param":
110            if not args.message or args.message.startswith("set"):
111                raise ValueError("Invalid message %s" % args.message)
112            try:
113                param, signature = process_param(d, messages[args.message], sig)
114                print(
115                    "Parameter: {par}, response signature {sig}".format(
116                        par=param,
117                        sig=_pretty_buffer(bytes(signature)),
118                    )
119                )
120            except OSError as e:
121                pretty_error(e.errno)
122        elif args.command == "set-param":
123            if not args.message or args.message.startswith("get"):
124                raise ValueError("Invalid message %s" % args.message)
125            try:
126                param, signature = process_param(d, messages[args.message], sig, data)
127                print(
128                    "Parameter: {par}, response signature {sig}".format(
129                        par=param,
130                        sig=_pretty_buffer(bytes(signature)),
131                    )
132                )
133            except OSError as e:
134                pretty_error(e.errno)
135