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Date: Fri, 26 Feb 2010 16:04:43 -0800
From: "Matt Carlson" <mcarlson@...adcom.com>
To: jbarnes@...tuousgeek.org
cc: linux-pci@...r.kernel.org, netdev@...r.kernel.org,
andy@...yhouse.net, mcarlson@...adcom.com,
"Michael Chan" <mchan@...adcom.com>
Subject: [PATCH v3 5/7] 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@...adcom.com>
Signed-off-by: Michael Chan <mchan@...adcom.com>
---
drivers/net/bnx2.c | 54 ++++++++++++++++++++++++++++----------------------
drivers/net/tg3.c | 32 ++++++++++++-----------------
drivers/pci/vpd.c | 18 +++++++++++++++++
include/linux/pci.h | 17 ++++++++++++++++
4 files changed, 78 insertions(+), 43 deletions(-)
diff --git a/drivers/net/bnx2.c b/drivers/net/bnx2.c
index 5909d1a..9feab11 100644
--- a/drivers/net/bnx2.c
+++ b/drivers/net/bnx2.c
@@ -7759,48 +7759,54 @@ 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;
+ mn_match = true;
+ }
- } else if (data[i] == 'V' && data[i + 1] == '0') {
- if (len > BNX2_MAX_VER_SLEN)
- goto vpd_done;
+ 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]);
- 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] = ' ';
+ 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;
}
diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c
index fc510dc..731ba67 100644
--- a/drivers/net/tg3.c
+++ b/drivers/net/tg3.c
@@ -12479,39 +12479,33 @@ 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. */
diff --git a/drivers/pci/vpd.c b/drivers/pci/vpd.c
index 6bc5545..a5a5ca1 100644
--- a/drivers/pci/vpd.c
+++ b/drivers/pci/vpd.c
@@ -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);
diff --git a/include/linux/pci.h b/include/linux/pci.h
index ead2492..7a7c7c3 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -1364,6 +1364,10 @@ 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
@@ -1409,5 +1413,18 @@ 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 */
--
1.6.4.4
--
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