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/*
* The PCI Utilities -- Show Vital Product Data
*
* Copyright (c) 2008 Solarflare Communications
*
* Written by Ben Hutchings <bhutchings@solarflare.com>
* Improved by Martin Mares <mj@ucw.cz>
*
* Can be freely distributed and used under the terms of the GNU GPL v2+.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include <stdio.h>
#include <string.h>
#include "lspci.h"
/*
* The list of all known VPD items and their formats.
* Technically, this belongs to the pci.ids file, but the VPD does not seem
* to be developed any longer, so we have chosen the easier way.
*/
enum vpd_format {
F_BINARY,
F_TEXT,
F_RESVD,
F_RDWR,
};
static const struct vpd_item {
byte id1, id2;
byte format;
const char *name;
} vpd_items[] = {
{ 'C','P', F_BINARY, "Extended capability" },
{ 'E','C', F_TEXT, "Engineering changes" },
{ 'M','N', F_TEXT, "Manufacture ID" },
{ 'P','N', F_TEXT, "Part number" },
{ 'R','V', F_RESVD, "Reserved" },
{ 'R','W', F_RDWR, "Read-write area" },
{ 'S','N', F_TEXT, "Serial number" },
{ 'Y','A', F_TEXT, "Asset tag" },
{ 'V', 0 , F_TEXT, "Vendor specific" },
{ 'Y', 0 , F_TEXT, "System specific" },
/* Non-standard extensions */
{ 'C','C', F_TEXT, "CCIN" },
{ 'F','C', F_TEXT, "Feature code" },
{ 'F','N', F_TEXT, "FRU" },
{ 'N','A', F_TEXT, "Network address" },
{ 'R','M', F_TEXT, "Firmware version" },
{ 'Z', 0 , F_TEXT, "Product specific" },
{ 0, 0 , F_BINARY, "Unknown" }
};
static void
print_vpd_string(const byte *buf, word len)
{
while (len--)
{
byte ch = *buf++;
if (ch == '\\')
printf("\\\\");
else if (!ch && !len)
; /* Cards with null-terminated strings have been observed */
else if (ch < 32 || ch == 127)
printf("\\x%02x", ch);
else
putchar(ch);
}
}
static void
print_vpd_binary(const byte *buf, word len)
{
int i;
for (i = 0; i < len; i++)
{
if (i)
putchar(' ');
printf("%02x", buf[i]);
}
}
static int
read_vpd(struct device *d, int pos, byte *buf, int len, byte *csum)
{
if (!pci_read_vpd(d->dev, pos, buf, len))
return 0;
while (len--)
*csum += *buf++;
return 1;
}
void
cap_vpd(struct device *d)
{
word res_addr = 0, res_len, part_pos, part_len;
byte buf[256];
byte tag;
byte csum = 0;
printf("Vital Product Data\n");
if (verbose < 2)
return;
while (res_addr <= PCI_VPD_ADDR_MASK)
{
if (!read_vpd(d, res_addr, &tag, 1, &csum))
break;
if (tag & 0x80)
{
if (res_addr > PCI_VPD_ADDR_MASK + 1 - 3)
break;
if (!read_vpd(d, res_addr + 1, buf, 2, &csum))
break;
res_len = buf[0] + (buf[1] << 8);
res_addr += 3;
}
else
{
res_len = tag & 7;
tag >>= 3;
res_addr += 1;
}
if (res_len > PCI_VPD_ADDR_MASK + 1 - res_addr)
break;
part_pos = 0;
switch (tag)
{
case 0x0f:
printf("\t\tEnd\n");
return;
case 0x82:
printf("\t\tProduct Name: ");
while (part_pos < res_len)
{
part_len = res_len - part_pos;
if (part_len > sizeof(buf))
part_len = sizeof(buf);
if (!read_vpd(d, res_addr + part_pos, buf, part_len, &csum))
break;
print_vpd_string(buf, part_len);
part_pos += part_len;
}
printf("\n");
break;
case 0x90:
case 0x91:
printf("\t\t%s fields:\n",
(tag == 0x90) ? "Read-only" : "Read/write");
while (part_pos + 3 <= res_len)
{
word read_len;
const struct vpd_item *item;
byte id[2], id1, id2;
if (!read_vpd(d, res_addr + part_pos, buf, 3, &csum))
break;
part_pos += 3;
memcpy(id, buf, 2);
id1 = id[0];
id2 = id[1];
part_len = buf[2];
if (part_len > res_len - part_pos)
break;
/* Is this item known? */
for (item=vpd_items; item->id1 && item->id1 != id1 ||
item->id2 && item->id2 != id2; item++)
;
/* Only read the first byte of the RV field because the
* remaining bytes are not included in the checksum. */
read_len = (item->format == F_RESVD) ? 1 : part_len;
if (!read_vpd(d, res_addr + part_pos, buf, read_len, &csum))
break;
printf("\t\t\t[");
print_vpd_string(id, 2);
printf("] %s: ", item->name);
switch (item->format)
{
case F_TEXT:
print_vpd_string(buf, part_len);
printf("\n");
break;
case F_BINARY:
print_vpd_binary(buf, part_len);
printf("\n");
break;
case F_RESVD:
printf("checksum %s, %d byte(s) reserved\n", csum ? "bad" : "good", part_len - 1);
break;
case F_RDWR:
printf("%d byte(s) free\n", part_len);
break;
}
part_pos += part_len;
}
break;
default:
printf("\t\tUnknown %s resource type %02x, will not decode more.\n",
(tag & 0x80) ? "large" : "small", tag & ~0x80);
return;
}
res_addr += res_len;
}
if (res_addr == 0)
printf("\t\tNot readable\n");
else
printf("\t\tNo end tag found\n");
}
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