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pci: Add helper to search for VPD keywords 

This patch adds the pci_vpd_find_info_keyword() helper function to
find information field keywords within read-only and read-write large
resource data type sections.

Signed-off-by: Matt Carlson <mcarlson@broadcom.com>
Signed-off-by: Michael Chan <mchan@broadcom.com>
Acked-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Matt Carlson 2010-02-26 14:04:43 +00:00 committed by David S. Miller
parent e1d5bdabb9
commit 4067a8541d
4 changed files with 81 additions and 46 deletions
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60
drivers/net/bnx2.c
View File

@ -7769,48 +7769,54 @@ bnx2_read_vpd_fw_ver(struct bnx2 *bp)
}
for (i = 0; i <= BNX2_VPD_LEN - 3; ) {
unsigned int block_end;
int j;
unsigned int block_end, rosize;
i = pci_vpd_find_tag(data, i, BNX2_VPD_LEN,
PCI_VPD_LRDT_RO_DATA);
if (i < 0)
break;
block_end = (i + PCI_VPD_LRDT_TAG_SIZE +
pci_vpd_lrdt_size(&data[i]));
rosize = pci_vpd_lrdt_size(&data[i]);
block_end = i + PCI_VPD_LRDT_TAG_SIZE + rosize;
i += PCI_VPD_LRDT_TAG_SIZE;
if (block_end > BNX2_VPD_LEN)
goto vpd_done;
while (i < (block_end - 2)) {
int len = pci_vpd_info_field_size(&data[i]);
j = pci_vpd_find_info_keyword(data, i, rosize,
PCI_VPD_RO_KEYWORD_MFR_ID);
if (j > 0) {
int len = pci_vpd_info_field_size(&data[j]);
if (i + PCI_VPD_INFO_FLD_HDR_SIZE + len > block_end)
if (j + PCI_VPD_INFO_FLD_HDR_SIZE + len > block_end ||
len != 4 ||
memcmp(&data[j + PCI_VPD_INFO_FLD_HDR_SIZE],
"1028", 4))
goto vpd_done;
if (data[i] == 'M' && data[i + 1] == 'N') {
if (len != 4 ||
memcmp(&data[i + PCI_VPD_INFO_FLD_HDR_SIZE],
"1028", 4))
goto vpd_done;
mn_match = true;
} else if (data[i] == 'V' && data[i + 1] == '0') {
if (len > BNX2_MAX_VER_SLEN)
goto vpd_done;
v0_len = len;
v0_str = &data[i + PCI_VPD_INFO_FLD_HDR_SIZE];
}
i += PCI_VPD_INFO_FLD_HDR_SIZE + len;
if (mn_match && v0_str) {
memcpy(bp->fw_version, v0_str, v0_len);
bp->fw_version[v0_len] = ' ';
goto vpd_done;
}
mn_match = true;
}
j = pci_vpd_find_info_keyword(data, i, rosize,
PCI_VPD_RO_KEYWORD_VENDOR0);
if (j > 0) {
int len = pci_vpd_info_field_size(&data[j]);
j += PCI_VPD_INFO_FLD_HDR_SIZE;
if (j + len > block_end || len > BNX2_MAX_VER_SLEN)
goto vpd_done;
v0_len = len;
v0_str = &data[j];
}
if (mn_match && v0_str) {
memcpy(bp->fw_version, v0_str, v0_len);
bp->fw_version[v0_len] = ' ';
goto vpd_done;
}
goto vpd_done;
}

32
drivers/net/tg3.c
View File

@ -12586,39 +12586,33 @@ static void __devinit tg3_read_partno(struct tg3 *tp)
/* Now parse and find the part number. */
for (i = 0; i < TG3_NVM_VPD_LEN - 2; ) {
unsigned int block_end;
unsigned int block_end, rosize;
i = pci_vpd_find_tag(vpd_data, i, TG3_NVM_VPD_LEN,
PCI_VPD_LRDT_RO_DATA);
if (i < 0)
break;
block_end = i + PCI_VPD_LRDT_TAG_SIZE +
pci_vpd_lrdt_size(&vpd_data[i]);
rosize = pci_vpd_lrdt_size(&vpd_data[i]);
block_end = i + PCI_VPD_LRDT_TAG_SIZE + rosize;
i += PCI_VPD_LRDT_TAG_SIZE;
if (block_end > TG3_NVM_VPD_LEN)
goto out_not_found;
while (i < (block_end - 2)) {
if (vpd_data[i + 0] == 'P' &&
vpd_data[i + 1] == 'N') {
int partno_len = pci_vpd_info_field_size(&vpd_data[i]);
i = pci_vpd_find_info_keyword(vpd_data, i, rosize,
PCI_VPD_RO_KEYWORD_PARTNO);
if (i > 0) {
u8 len = pci_vpd_info_field_size(&vpd_data[i]);
i += PCI_VPD_INFO_FLD_HDR_SIZE;
if (partno_len > TG3_BPN_SIZE ||
(partno_len + i) > TG3_NVM_VPD_LEN)
goto out_not_found;
i += PCI_VPD_INFO_FLD_HDR_SIZE;
if (len > TG3_BPN_SIZE ||
(len + i) > TG3_NVM_VPD_LEN)
break;
memcpy(tp->board_part_number,
&vpd_data[i], partno_len);
memcpy(tp->board_part_number, &vpd_data[i], len);
/* Success. */
return;
}
i += PCI_VPD_INFO_FLD_HDR_SIZE +
pci_vpd_info_field_size(&vpd_data[i]);
return;
}
/* Part number not found. */

18
drivers/pci/vpd.c
View File

@ -41,3 +41,21 @@ int pci_vpd_find_tag(const u8 *buf, unsigned int off, unsigned int len, u8 rdt)
return -ENOENT;
}
EXPORT_SYMBOL_GPL(pci_vpd_find_tag);
int pci_vpd_find_info_keyword(const u8 *buf, unsigned int off,
unsigned int len, const char *kw)
{
int i;
for (i = off; i + PCI_VPD_INFO_FLD_HDR_SIZE <= off + len;) {
if (buf[i + 0] == kw[0] &&
buf[i + 1] == kw[1])
return i;
i += PCI_VPD_INFO_FLD_HDR_SIZE +
pci_vpd_info_field_size(&buf[i]);
}
return -ENOENT;
}
EXPORT_SYMBOL_GPL(pci_vpd_find_info_keyword);

17
include/linux/pci.h
View File

@ -1375,6 +1375,10 @@ void pci_request_acs(void);
#define PCI_VPD_INFO_FLD_HDR_SIZE 3
#define PCI_VPD_RO_KEYWORD_PARTNO "PN"
#define PCI_VPD_RO_KEYWORD_MFR_ID "MN"
#define PCI_VPD_RO_KEYWORD_VENDOR0 "V0"
/**
* pci_vpd_lrdt_size - Extracts the Large Resource Data Type length
* @lrdt: Pointer to the beginning of the Large Resource Data Type tag
@ -1420,5 +1424,18 @@ static inline u8 pci_vpd_info_field_size(const u8 *info_field)
*/
int pci_vpd_find_tag(const u8 *buf, unsigned int off, unsigned int len, u8 rdt);
/**
* pci_vpd_find_info_keyword - Locates an information field keyword in the VPD
* @buf: Pointer to buffered vpd data
* @off: The offset into the buffer at which to begin the search
* @len: The length of the buffer area, relative to off, in which to search
* @kw: The keyword to search for
*
* Returns the index where the information field keyword was found or
* -ENOENT otherwise.
*/
int pci_vpd_find_info_keyword(const u8 *buf, unsigned int off,
unsigned int len, const char *kw);
#endif /* __KERNEL__ */
#endif /* LINUX_PCI_H */