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Message-ID: <1267229085-21303-4-git-send-email-mcarlson@broadcom.com>
Date: Fri, 26 Feb 2010 16:04:41 -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 3/7] pci: Add helper to find a VPD resource data type
This patch adds the pci_vpd_find_tag() helper function to find VPD
resource data types in a buffer.
Signed-off-by: Matt Carlson <mcarlson@...adcom.com>
Signed-off-by: Michael Chan <mchan@...adcom.com>
---
drivers/net/bnx2.c | 24 ++++--------------------
drivers/net/tg3.c | 26 +++++---------------------
drivers/pci/Makefile | 2 +-
drivers/pci/vpd.c | 43 +++++++++++++++++++++++++++++++++++++++++++
include/linux/pci.h | 12 ++++++++++++
5 files changed, 65 insertions(+), 42 deletions(-)
create mode 100644 drivers/pci/vpd.c
diff --git a/drivers/net/bnx2.c b/drivers/net/bnx2.c
index 7caa98d..02809da 100644
--- a/drivers/net/bnx2.c
+++ b/drivers/net/bnx2.c
@@ -7759,28 +7759,12 @@ bnx2_read_vpd_fw_ver(struct bnx2 *bp)
}
for (i = 0; i <= BNX2_VPD_LEN - 3; ) {
- unsigned char val = data[i];
unsigned int block_end;
- if (val & PCI_VPD_LRDT) {
- if (i + PCI_VPD_LRDT_TAG_SIZE > BNX2_VPD_LEN)
- break;
-
- if (val != PCI_VPD_LRDT_RO_DATA) {
- i += PCI_VPD_LRDT_TAG_SIZE +
- pci_vpd_lrdt_size(&data[i]);
-
- continue;
- }
- } else {
- if ((val & PCI_VPD_SRDT_TIN_MASK) == PCI_VPD_STIN_END)
- break;
-
- i += PCI_VPD_SRDT_TAG_SIZE +
- pci_vpd_srdt_size(&data[i]);
-
- continue;
- }
+ 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]));
diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c
index 4c24998..3e5696b 100644
--- a/drivers/net/tg3.c
+++ b/drivers/net/tg3.c
@@ -12440,7 +12440,7 @@ skip_phy_reset:
static void __devinit tg3_read_partno(struct tg3 *tp)
{
unsigned char vpd_data[TG3_NVM_VPD_LEN]; /* in little-endian format */
- unsigned int i;
+ int i;
u32 magic;
if ((tp->tg3_flags3 & TG3_FLG3_NO_NVRAM) ||
@@ -12479,28 +12479,12 @@ 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 char val = vpd_data[i];
unsigned int block_end;
- if (val & PCI_VPD_LRDT) {
- if (i + PCI_VPD_LRDT_TAG_SIZE > TG3_NVM_VPD_LEN)
- break;
-
- if (val != PCI_VPD_LRDT_RO_DATA) {
- i += PCI_VPD_LRDT_TAG_SIZE +
- pci_vpd_lrdt_size(&vpd_data[i]);
-
- continue;
- }
- } else {
- if ((val & PCI_VPD_SRDT_TIN_MASK) == PCI_VPD_STIN_END)
- break;
-
- i += PCI_VPD_SRDT_TAG_SIZE +
- pci_vpd_srdt_size(&vpd_data[i]);
-
- continue;
- }
+ 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]);
diff --git a/drivers/pci/Makefile b/drivers/pci/Makefile
index 4df48d5..b2f6d77 100644
--- a/drivers/pci/Makefile
+++ b/drivers/pci/Makefile
@@ -4,7 +4,7 @@
obj-y += access.o bus.o probe.o remove.o pci.o quirks.o \
pci-driver.o search.o pci-sysfs.o rom.o setup-res.o \
- irq.o
+ irq.o vpd.o
obj-$(CONFIG_PROC_FS) += proc.o
obj-$(CONFIG_SYSFS) += slot.o
diff --git a/drivers/pci/vpd.c b/drivers/pci/vpd.c
new file mode 100644
index 0000000..6bc5545
--- /dev/null
+++ b/drivers/pci/vpd.c
@@ -0,0 +1,43 @@
+/*
+ * File: vpd.c
+ * Purpose: Provide PCI VPD support
+ *
+ * Copyright (C) 2010 Broadcom Corporation.
+ */
+
+#include <linux/pci.h>
+
+int pci_vpd_find_tag(const u8 *buf, unsigned int off, unsigned int len, u8 rdt)
+{
+ int i;
+
+ for (i = off; i < len; ) {
+ u8 val = buf[i];
+
+ if (val & PCI_VPD_LRDT) {
+ /* Don't return success of the tag isn't complete */
+ if (i + PCI_VPD_LRDT_TAG_SIZE > len)
+ break;
+
+ if (val == rdt)
+ return i;
+
+ i += PCI_VPD_LRDT_TAG_SIZE +
+ pci_vpd_lrdt_size(&buf[i]);
+ } else {
+ u8 tag = val & ~PCI_VPD_SRDT_LEN_MASK;
+
+ if (tag == rdt)
+ return i;
+
+ if (tag == PCI_VPD_SRDT_END)
+ break;
+
+ i += PCI_VPD_SRDT_TAG_SIZE +
+ pci_vpd_srdt_size(&buf[i]);
+ }
+ }
+
+ return -ENOENT;
+}
+EXPORT_SYMBOL_GPL(pci_vpd_find_tag);
diff --git a/include/linux/pci.h b/include/linux/pci.h
index d6f2b17..c2da353 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -1384,5 +1384,17 @@ static inline u8 pci_vpd_srdt_size(const u8 *srdt)
return (*srdt) & PCI_VPD_SRDT_LEN_MASK;
}
+/**
+ * pci_vpd_find_tag - Locates the Resource Data Type tag provided
+ * @buf: Pointer to buffered vpd data
+ * @off: The offset into the buffer at which to begin the search
+ * @len: The length of the vpd buffer
+ * @rdt: The Resource Data Type to search for
+ *
+ * Returns the index where the Resource Data Type was found or
+ * -ENOENT otherwise.
+ */
+int pci_vpd_find_tag(const u8 *buf, unsigned int off, unsigned int len, u8 rdt);
+
#endif /* __KERNEL__ */
#endif /* LINUX_PCI_H */
--
1.6.4.4
--
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