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c7a34993 MM |
1 | /* |
2 | * The PCI Utilities -- Show Vital Product Data | |
3 | * | |
2ba49657 MM |
4 | * Copyright (c) 2008 Solarflare Communications |
5 | * | |
6 | * Written by Ben Hutchings <bhutchings@solarflare.com> | |
01f4caed | 7 | * Improved by Martin Mares <mj@ucw.cz> |
c7a34993 MM |
8 | * |
9 | * Can be freely distributed and used under the terms of the GNU GPL. | |
10 | */ | |
11 | ||
12 | #include <stdio.h> | |
13 | ||
14 | #include "lspci.h" | |
15 | ||
01f4caed MM |
16 | /* |
17 | * The list of all known VPD items and their formats. | |
18 | * Technically, this belongs to the pci.ids file, but the VPD does not seem | |
19 | * to be developed any longer, so we have chosen the easier way. | |
20 | */ | |
21 | ||
22 | enum vpd_format { | |
23 | F_BINARY, | |
24 | F_TEXT, | |
25 | F_RESVD, | |
26 | F_RDWR, | |
27 | }; | |
28 | ||
29 | static const struct vpd_item { | |
30 | byte id1, id2; | |
31 | byte format; | |
32 | const char *name; | |
33 | } vpd_items[] = { | |
34 | { 'C','P', F_BINARY, "Extended capability" }, | |
35 | { 'E','C', F_TEXT, "Engineering changes" }, | |
b7ffb971 | 36 | { 'M','N', F_TEXT, "Manufacture ID" }, |
01f4caed MM |
37 | { 'P','N', F_TEXT, "Part number" }, |
38 | { 'R','V', F_RESVD, "Reserved" }, | |
39 | { 'R','W', F_RDWR, "Read-write area" }, | |
40 | { 'S','N', F_TEXT, "Serial number" }, | |
41 | { 'Y','A', F_TEXT, "Asset tag" }, | |
42 | { 'V', 0 , F_TEXT, "Vendor specific" }, | |
43 | { 'Y', 0 , F_TEXT, "System specific" }, | |
7f9d3023 | 44 | { 0, 0 , F_BINARY, "Unknown" } |
01f4caed MM |
45 | }; |
46 | ||
c7a34993 MM |
47 | static void |
48 | print_vpd_string(const byte *buf, word len) | |
49 | { | |
50 | while (len--) | |
51 | { | |
52 | byte ch = *buf++; | |
53 | if (ch == '\\') | |
54 | printf("\\\\"); | |
db2a16f4 MM |
55 | else if (!ch && !len) |
56 | ; /* Cards with null-terminated strings have been observed */ | |
c7a34993 MM |
57 | else if (ch < 32 || ch == 127) |
58 | printf("\\x%02x", ch); | |
59 | else | |
60 | putchar(ch); | |
61 | } | |
62 | } | |
63 | ||
01f4caed MM |
64 | static void |
65 | print_vpd_binary(const byte *buf, word len) | |
66 | { | |
67 | int i; | |
68 | for (i = 0; i < len; i++) | |
69 | { | |
70 | if (i) | |
71 | putchar(' '); | |
72 | printf("%02x", buf[i]); | |
73 | } | |
74 | } | |
75 | ||
c7a34993 MM |
76 | static int |
77 | read_vpd(struct device *d, int pos, byte *buf, int len, byte *csum) | |
78 | { | |
79 | if (!pci_read_vpd(d->dev, pos, buf, len)) | |
80 | return 0; | |
81 | while (len--) | |
82 | *csum += *buf++; | |
83 | return 1; | |
84 | } | |
85 | ||
86 | void | |
87 | cap_vpd(struct device *d) | |
88 | { | |
89 | word res_addr = 0, res_len, part_pos, part_len; | |
01f4caed | 90 | byte buf[256]; |
c7a34993 MM |
91 | byte tag; |
92 | byte csum = 0; | |
93 | ||
94 | printf("Vital Product Data\n"); | |
746c9057 MM |
95 | if (verbose < 2) |
96 | return; | |
c7a34993 MM |
97 | |
98 | while (res_addr <= PCI_VPD_ADDR_MASK) | |
99 | { | |
100 | if (!read_vpd(d, res_addr, &tag, 1, &csum)) | |
101 | break; | |
102 | if (tag & 0x80) | |
103 | { | |
104 | if (res_addr > PCI_VPD_ADDR_MASK + 1 - 3) | |
105 | break; | |
106 | if (!read_vpd(d, res_addr + 1, buf, 2, &csum)) | |
107 | break; | |
108 | res_len = buf[0] + (buf[1] << 8); | |
109 | res_addr += 3; | |
110 | } | |
111 | else | |
112 | { | |
113 | res_len = tag & 7; | |
114 | tag >>= 3; | |
115 | res_addr += 1; | |
116 | } | |
117 | if (res_len > PCI_VPD_ADDR_MASK + 1 - res_addr) | |
118 | break; | |
119 | ||
120 | part_pos = 0; | |
121 | ||
122 | switch (tag) | |
123 | { | |
124 | case 0x0f: | |
125 | printf("\t\tEnd\n"); | |
126 | return; | |
127 | ||
128 | case 0x82: | |
129 | printf("\t\tProduct Name: "); | |
130 | while (part_pos < res_len) | |
131 | { | |
132 | part_len = res_len - part_pos; | |
133 | if (part_len > sizeof(buf)) | |
134 | part_len = sizeof(buf); | |
135 | if (!read_vpd(d, res_addr + part_pos, buf, part_len, &csum)) | |
136 | break; | |
137 | print_vpd_string(buf, part_len); | |
138 | part_pos += part_len; | |
139 | } | |
140 | printf("\n"); | |
141 | break; | |
142 | ||
143 | case 0x90: | |
144 | case 0x91: | |
145 | printf("\t\t%s fields:\n", | |
146 | (tag == 0x90) ? "Read-only" : "Read/write"); | |
147 | ||
148 | while (part_pos + 3 <= res_len) | |
149 | { | |
150 | word read_len; | |
01f4caed | 151 | const struct vpd_item *item; |
7f9d3023 | 152 | byte id1, id2; |
c7a34993 MM |
153 | |
154 | if (!read_vpd(d, res_addr + part_pos, buf, 3, &csum)) | |
155 | break; | |
156 | part_pos += 3; | |
7f9d3023 BH |
157 | id1 = buf[0]; |
158 | id2 = buf[1]; | |
c7a34993 MM |
159 | part_len = buf[2]; |
160 | if (part_len > res_len - part_pos) | |
161 | break; | |
162 | ||
01f4caed | 163 | /* Is this item known? */ |
7f9d3023 BH |
164 | for (item=vpd_items; item->id1 && item->id1 != id1 || |
165 | item->id2 && item->id2 != id2; item++) | |
01f4caed | 166 | ; |
01f4caed | 167 | |
c7a34993 MM |
168 | /* Only read the first byte of the RV field because the |
169 | * remaining bytes are not included in the checksum. */ | |
01f4caed | 170 | read_len = (item->format == F_RESVD) ? 1 : part_len; |
c7a34993 MM |
171 | if (!read_vpd(d, res_addr + part_pos, buf, read_len, &csum)) |
172 | break; | |
173 | ||
7f9d3023 | 174 | printf("\t\t\t[%c%c] %s: ", id1, id2, item->name); |
01f4caed MM |
175 | |
176 | switch (item->format) | |
177 | { | |
178 | case F_TEXT: | |
c7a34993 MM |
179 | print_vpd_string(buf, part_len); |
180 | printf("\n"); | |
01f4caed MM |
181 | break; |
182 | case F_BINARY: | |
183 | print_vpd_binary(buf, part_len); | |
c7a34993 | 184 | printf("\n"); |
01f4caed MM |
185 | break; |
186 | case F_RESVD: | |
187 | printf("checksum %s, %d byte(s) reserved\n", csum ? "bad" : "good", part_len - 1); | |
188 | break; | |
189 | case F_RDWR: | |
190 | printf("%d byte(s) free\n", part_len); | |
191 | break; | |
c7a34993 MM |
192 | } |
193 | ||
194 | part_pos += part_len; | |
195 | } | |
196 | break; | |
197 | ||
198 | default: | |
169bfd45 | 199 | printf("\t\tUnknown %s resource type %02x, will not decode more.\n", |
c7a34993 | 200 | (tag & 0x80) ? "large" : "small", tag & ~0x80); |
9eaaf5c7 | 201 | return; |
c7a34993 MM |
202 | } |
203 | ||
204 | res_addr += res_len; | |
205 | } | |
206 | ||
207 | if (res_addr == 0) | |
208 | printf("\t\tNot readable\n"); | |
209 | else | |
210 | printf("\t\tNo end tag found\n"); | |
211 | } |