[PATCH v1 0/4] PCI/VPD: Encapsulate VPD stuff in vpd.c

[PATCH v1 0/4] PCI/VPD: Encapsulate VPD stuff in vpd.c

[Bjorn Helgaas]

This is strictly cleanup, not intended to change or fix anything.

Move all the VPD-related code and structures to drivers/pci/vpd.c.

---

Bjorn Helgaas (4):
      PCI/VPD: Move VPD access code to vpd.c
      PCI/VPD: Move VPD sysfs code to vpd.c
      PCI/VPD: Move VPD quirks to vpd.c
      PCI/VPD: Move VPD structures to vpd.c


 drivers/pci/access.c    |  368 ------------------------------
 drivers/pci/pci-sysfs.c |   67 -----
 drivers/pci/pci.h       |   19 --
 drivers/pci/quirks.c    |  121 ----------
 drivers/pci/vpd.c       |  573 +++++++++++++++++++++++++++++++++++++++++++++++
 5 files changed, 578 insertions(+), 570 deletions(-)

[PATCH v1 1/4] PCI/VPD: Move VPD access code to vpd.c

[Bjorn Helgaas]

From: Bjorn Helgaas <bhelgaas@google.com>

Move the VPD-related code from access.c to vpd.c.  The goal is to
encapsulate all the VPD code and structures in vpd.c.

No functional change intended.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
 drivers/pci/access.c |  368 --------------------------------------------------
 drivers/pci/vpd.c    |  369 ++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 369 insertions(+), 368 deletions(-)

diff --git a/drivers/pci/access.c b/drivers/pci/access.c
index 5e9a9822d9d4..e080eb74bda0 100644
--- a/drivers/pci/access.c
+++ b/drivers/pci/access.c
@@ -1,8 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
-#include <linux/delay.h>
 #include <linux/pci.h>
 #include <linux/module.h>
-#include <linux/sched/signal.h>
 #include <linux/slab.h>
 #include <linux/ioport.h>
 #include <linux/wait.h>
@@ -264,372 +262,6 @@ PCI_USER_WRITE_CONFIG(byte, u8)
 PCI_USER_WRITE_CONFIG(word, u16)
 PCI_USER_WRITE_CONFIG(dword, u32)
 
-/* VPD access through PCI 2.2+ VPD capability */
-
-/**
- * pci_read_vpd - Read one entry from Vital Product Data
- * @dev:	pci device struct
- * @pos:	offset in vpd space
- * @count:	number of bytes to read
- * @buf:	pointer to where to store result
- */
-ssize_t pci_read_vpd(struct pci_dev *dev, loff_t pos, size_t count, void *buf)
-{
-	if (!dev->vpd || !dev->vpd->ops)
-		return -ENODEV;
-	return dev->vpd->ops->read(dev, pos, count, buf);
-}
-EXPORT_SYMBOL(pci_read_vpd);
-
-/**
- * pci_write_vpd - Write entry to Vital Product Data
- * @dev:	pci device struct
- * @pos:	offset in vpd space
- * @count:	number of bytes to write
- * @buf:	buffer containing write data
- */
-ssize_t pci_write_vpd(struct pci_dev *dev, loff_t pos, size_t count, const void *buf)
-{
-	if (!dev->vpd || !dev->vpd->ops)
-		return -ENODEV;
-	return dev->vpd->ops->write(dev, pos, count, buf);
-}
-EXPORT_SYMBOL(pci_write_vpd);
-
-/**
- * pci_set_vpd_size - Set size of Vital Product Data space
- * @dev:	pci device struct
- * @len:	size of vpd space
- */
-int pci_set_vpd_size(struct pci_dev *dev, size_t len)
-{
-	if (!dev->vpd || !dev->vpd->ops)
-		return -ENODEV;
-	return dev->vpd->ops->set_size(dev, len);
-}
-EXPORT_SYMBOL(pci_set_vpd_size);
-
-#define PCI_VPD_MAX_SIZE (PCI_VPD_ADDR_MASK + 1)
-
-/**
- * pci_vpd_size - determine actual size of Vital Product Data
- * @dev:	pci device struct
- * @old_size:	current assumed size, also maximum allowed size
- */
-static size_t pci_vpd_size(struct pci_dev *dev, size_t old_size)
-{
-	size_t off = 0;
-	unsigned char header[1+2];	/* 1 byte tag, 2 bytes length */
-
-	while (off < old_size &&
-	       pci_read_vpd(dev, off, 1, header) == 1) {
-		unsigned char tag;
-
-		if (header[0] & PCI_VPD_LRDT) {
-			/* Large Resource Data Type Tag */
-			tag = pci_vpd_lrdt_tag(header);
-			/* Only read length from known tag items */
-			if ((tag == PCI_VPD_LTIN_ID_STRING) ||
-			    (tag == PCI_VPD_LTIN_RO_DATA) ||
-			    (tag == PCI_VPD_LTIN_RW_DATA)) {
-				if (pci_read_vpd(dev, off+1, 2,
-						 &header[1]) != 2) {
-					pci_warn(dev, "invalid large VPD tag %02x size at offset %zu",
-						 tag, off + 1);
-					return 0;
-				}
-				off += PCI_VPD_LRDT_TAG_SIZE +
-					pci_vpd_lrdt_size(header);
-			}
-		} else {
-			/* Short Resource Data Type Tag */
-			off += PCI_VPD_SRDT_TAG_SIZE +
-				pci_vpd_srdt_size(header);
-			tag = pci_vpd_srdt_tag(header);
-		}
-
-		if (tag == PCI_VPD_STIN_END)	/* End tag descriptor */
-			return off;
-
-		if ((tag != PCI_VPD_LTIN_ID_STRING) &&
-		    (tag != PCI_VPD_LTIN_RO_DATA) &&
-		    (tag != PCI_VPD_LTIN_RW_DATA)) {
-			pci_warn(dev, "invalid %s VPD tag %02x at offset %zu",
-				 (header[0] & PCI_VPD_LRDT) ? "large" : "short",
-				 tag, off);
-			return 0;
-		}
-	}
-	return 0;
-}
-
-/*
- * Wait for last operation to complete.
- * This code has to spin since there is no other notification from the PCI
- * hardware. Since the VPD is often implemented by serial attachment to an
- * EEPROM, it may take many milliseconds to complete.
- *
- * Returns 0 on success, negative values indicate error.
- */
-static int pci_vpd_wait(struct pci_dev *dev)
-{
-	struct pci_vpd *vpd = dev->vpd;
-	unsigned long timeout = jiffies + msecs_to_jiffies(125);
-	unsigned long max_sleep = 16;
-	u16 status;
-	int ret;
-
-	if (!vpd->busy)
-		return 0;
-
-	while (time_before(jiffies, timeout)) {
-		ret = pci_user_read_config_word(dev, vpd->cap + PCI_VPD_ADDR,
-						&status);
-		if (ret < 0)
-			return ret;
-
-		if ((status & PCI_VPD_ADDR_F) == vpd->flag) {
-			vpd->busy = 0;
-			return 0;
-		}
-
-		if (fatal_signal_pending(current))
-			return -EINTR;
-
-		usleep_range(10, max_sleep);
-		if (max_sleep < 1024)
-			max_sleep *= 2;
-	}
-
-	pci_warn(dev, "VPD access failed.  This is likely a firmware bug on this device.  Contact the card vendor for a firmware update\n");
-	return -ETIMEDOUT;
-}
-
-static ssize_t pci_vpd_read(struct pci_dev *dev, loff_t pos, size_t count,
-			    void *arg)
-{
-	struct pci_vpd *vpd = dev->vpd;
-	int ret;
-	loff_t end = pos + count;
-	u8 *buf = arg;
-
-	if (pos < 0)
-		return -EINVAL;
-
-	if (!vpd->valid) {
-		vpd->valid = 1;
-		vpd->len = pci_vpd_size(dev, vpd->len);
-	}
-
-	if (vpd->len == 0)
-		return -EIO;
-
-	if (pos > vpd->len)
-		return 0;
-
-	if (end > vpd->len) {
-		end = vpd->len;
-		count = end - pos;
-	}
-
-	if (mutex_lock_killable(&vpd->lock))
-		return -EINTR;
-
-	ret = pci_vpd_wait(dev);
-	if (ret < 0)
-		goto out;
-
-	while (pos < end) {
-		u32 val;
-		unsigned int i, skip;
-
-		ret = pci_user_write_config_word(dev, vpd->cap + PCI_VPD_ADDR,
-						 pos & ~3);
-		if (ret < 0)
-			break;
-		vpd->busy = 1;
-		vpd->flag = PCI_VPD_ADDR_F;
-		ret = pci_vpd_wait(dev);
-		if (ret < 0)
-			break;
-
-		ret = pci_user_read_config_dword(dev, vpd->cap + PCI_VPD_DATA, &val);
-		if (ret < 0)
-			break;
-
-		skip = pos & 3;
-		for (i = 0;  i < sizeof(u32); i++) {
-			if (i >= skip) {
-				*buf++ = val;
-				if (++pos == end)
-					break;
-			}
-			val >>= 8;
-		}
-	}
-out:
-	mutex_unlock(&vpd->lock);
-	return ret ? ret : count;
-}
-
-static ssize_t pci_vpd_write(struct pci_dev *dev, loff_t pos, size_t count,
-			     const void *arg)
-{
-	struct pci_vpd *vpd = dev->vpd;
-	const u8 *buf = arg;
-	loff_t end = pos + count;
-	int ret = 0;
-
-	if (pos < 0 || (pos & 3) || (count & 3))
-		return -EINVAL;
-
-	if (!vpd->valid) {
-		vpd->valid = 1;
-		vpd->len = pci_vpd_size(dev, vpd->len);
-	}
-
-	if (vpd->len == 0)
-		return -EIO;
-
-	if (end > vpd->len)
-		return -EINVAL;
-
-	if (mutex_lock_killable(&vpd->lock))
-		return -EINTR;
-
-	ret = pci_vpd_wait(dev);
-	if (ret < 0)
-		goto out;
-
-	while (pos < end) {
-		u32 val;
-
-		val = *buf++;
-		val |= *buf++ << 8;
-		val |= *buf++ << 16;
-		val |= *buf++ << 24;
-
-		ret = pci_user_write_config_dword(dev, vpd->cap + PCI_VPD_DATA, val);
-		if (ret < 0)
-			break;
-		ret = pci_user_write_config_word(dev, vpd->cap + PCI_VPD_ADDR,
-						 pos | PCI_VPD_ADDR_F);
-		if (ret < 0)
-			break;
-
-		vpd->busy = 1;
-		vpd->flag = 0;
-		ret = pci_vpd_wait(dev);
-		if (ret < 0)
-			break;
-
-		pos += sizeof(u32);
-	}
-out:
-	mutex_unlock(&vpd->lock);
-	return ret ? ret : count;
-}
-
-static int pci_vpd_set_size(struct pci_dev *dev, size_t len)
-{
-	struct pci_vpd *vpd = dev->vpd;
-
-	if (len == 0 || len > PCI_VPD_MAX_SIZE)
-		return -EIO;
-
-	vpd->valid = 1;
-	vpd->len = len;
-
-	return 0;
-}
-
-static const struct pci_vpd_ops pci_vpd_ops = {
-	.read = pci_vpd_read,
-	.write = pci_vpd_write,
-	.set_size = pci_vpd_set_size,
-};
-
-static ssize_t pci_vpd_f0_read(struct pci_dev *dev, loff_t pos, size_t count,
-			       void *arg)
-{
-	struct pci_dev *tdev = pci_get_slot(dev->bus,
-					    PCI_DEVFN(PCI_SLOT(dev->devfn), 0));
-	ssize_t ret;
-
-	if (!tdev)
-		return -ENODEV;
-
-	ret = pci_read_vpd(tdev, pos, count, arg);
-	pci_dev_put(tdev);
-	return ret;
-}
-
-static ssize_t pci_vpd_f0_write(struct pci_dev *dev, loff_t pos, size_t count,
-				const void *arg)
-{
-	struct pci_dev *tdev = pci_get_slot(dev->bus,
-					    PCI_DEVFN(PCI_SLOT(dev->devfn), 0));
-	ssize_t ret;
-
-	if (!tdev)
-		return -ENODEV;
-
-	ret = pci_write_vpd(tdev, pos, count, arg);
-	pci_dev_put(tdev);
-	return ret;
-}
-
-static int pci_vpd_f0_set_size(struct pci_dev *dev, size_t len)
-{
-	struct pci_dev *tdev = pci_get_slot(dev->bus,
-					    PCI_DEVFN(PCI_SLOT(dev->devfn), 0));
-	int ret;
-
-	if (!tdev)
-		return -ENODEV;
-
-	ret = pci_set_vpd_size(tdev, len);
-	pci_dev_put(tdev);
-	return ret;
-}
-
-static const struct pci_vpd_ops pci_vpd_f0_ops = {
-	.read = pci_vpd_f0_read,
-	.write = pci_vpd_f0_write,
-	.set_size = pci_vpd_f0_set_size,
-};
-
-int pci_vpd_init(struct pci_dev *dev)
-{
-	struct pci_vpd *vpd;
-	u8 cap;
-
-	cap = pci_find_capability(dev, PCI_CAP_ID_VPD);
-	if (!cap)
-		return -ENODEV;
-
-	vpd = kzalloc(sizeof(*vpd), GFP_ATOMIC);
-	if (!vpd)
-		return -ENOMEM;
-
-	vpd->len = PCI_VPD_MAX_SIZE;
-	if (dev->dev_flags & PCI_DEV_FLAGS_VPD_REF_F0)
-		vpd->ops = &pci_vpd_f0_ops;
-	else
-		vpd->ops = &pci_vpd_ops;
-	mutex_init(&vpd->lock);
-	vpd->cap = cap;
-	vpd->busy = 0;
-	vpd->valid = 0;
-	dev->vpd = vpd;
-	return 0;
-}
-
-void pci_vpd_release(struct pci_dev *dev)
-{
-	kfree(dev->vpd);
-}
-
 /**
  * pci_cfg_access_lock - Lock PCI config reads/writes
  * @dev:	pci device struct
diff --git a/drivers/pci/vpd.c b/drivers/pci/vpd.c
index 70fba57d6103..4596452d58bf 100644
--- a/drivers/pci/vpd.c
+++ b/drivers/pci/vpd.c
@@ -7,7 +7,376 @@
  */
 
 #include <linux/pci.h>
+#include <linux/delay.h>
 #include <linux/export.h>
+#include <linux/sched/signal.h>
+#include "pci.h"
+
+/* VPD access through PCI 2.2+ VPD capability */
+
+/**
+ * pci_read_vpd - Read one entry from Vital Product Data
+ * @dev:	pci device struct
+ * @pos:	offset in vpd space
+ * @count:	number of bytes to read
+ * @buf:	pointer to where to store result
+ */
+ssize_t pci_read_vpd(struct pci_dev *dev, loff_t pos, size_t count, void *buf)
+{
+	if (!dev->vpd || !dev->vpd->ops)
+		return -ENODEV;
+	return dev->vpd->ops->read(dev, pos, count, buf);
+}
+EXPORT_SYMBOL(pci_read_vpd);
+
+/**
+ * pci_write_vpd - Write entry to Vital Product Data
+ * @dev:	pci device struct
+ * @pos:	offset in vpd space
+ * @count:	number of bytes to write
+ * @buf:	buffer containing write data
+ */
+ssize_t pci_write_vpd(struct pci_dev *dev, loff_t pos, size_t count, const void *buf)
+{
+	if (!dev->vpd || !dev->vpd->ops)
+		return -ENODEV;
+	return dev->vpd->ops->write(dev, pos, count, buf);
+}
+EXPORT_SYMBOL(pci_write_vpd);
+
+/**
+ * pci_set_vpd_size - Set size of Vital Product Data space
+ * @dev:	pci device struct
+ * @len:	size of vpd space
+ */
+int pci_set_vpd_size(struct pci_dev *dev, size_t len)
+{
+	if (!dev->vpd || !dev->vpd->ops)
+		return -ENODEV;
+	return dev->vpd->ops->set_size(dev, len);
+}
+EXPORT_SYMBOL(pci_set_vpd_size);
+
+#define PCI_VPD_MAX_SIZE (PCI_VPD_ADDR_MASK + 1)
+
+/**
+ * pci_vpd_size - determine actual size of Vital Product Data
+ * @dev:	pci device struct
+ * @old_size:	current assumed size, also maximum allowed size
+ */
+static size_t pci_vpd_size(struct pci_dev *dev, size_t old_size)
+{
+	size_t off = 0;
+	unsigned char header[1+2];	/* 1 byte tag, 2 bytes length */
+
+	while (off < old_size &&
+	       pci_read_vpd(dev, off, 1, header) == 1) {
+		unsigned char tag;
+
+		if (header[0] & PCI_VPD_LRDT) {
+			/* Large Resource Data Type Tag */
+			tag = pci_vpd_lrdt_tag(header);
+			/* Only read length from known tag items */
+			if ((tag == PCI_VPD_LTIN_ID_STRING) ||
+			    (tag == PCI_VPD_LTIN_RO_DATA) ||
+			    (tag == PCI_VPD_LTIN_RW_DATA)) {
+				if (pci_read_vpd(dev, off+1, 2,
+						 &header[1]) != 2) {
+					pci_warn(dev, "invalid large VPD tag %02x size at offset %zu",
+						 tag, off + 1);
+					return 0;
+				}
+				off += PCI_VPD_LRDT_TAG_SIZE +
+					pci_vpd_lrdt_size(header);
+			}
+		} else {
+			/* Short Resource Data Type Tag */
+			off += PCI_VPD_SRDT_TAG_SIZE +
+				pci_vpd_srdt_size(header);
+			tag = pci_vpd_srdt_tag(header);
+		}
+
+		if (tag == PCI_VPD_STIN_END)	/* End tag descriptor */
+			return off;
+
+		if ((tag != PCI_VPD_LTIN_ID_STRING) &&
+		    (tag != PCI_VPD_LTIN_RO_DATA) &&
+		    (tag != PCI_VPD_LTIN_RW_DATA)) {
+			pci_warn(dev, "invalid %s VPD tag %02x at offset %zu",
+				 (header[0] & PCI_VPD_LRDT) ? "large" : "short",
+				 tag, off);
+			return 0;
+		}
+	}
+	return 0;
+}
+
+/*
+ * Wait for last operation to complete.
+ * This code has to spin since there is no other notification from the PCI
+ * hardware. Since the VPD is often implemented by serial attachment to an
+ * EEPROM, it may take many milliseconds to complete.
+ *
+ * Returns 0 on success, negative values indicate error.
+ */
+static int pci_vpd_wait(struct pci_dev *dev)
+{
+	struct pci_vpd *vpd = dev->vpd;
+	unsigned long timeout = jiffies + msecs_to_jiffies(125);
+	unsigned long max_sleep = 16;
+	u16 status;
+	int ret;
+
+	if (!vpd->busy)
+		return 0;
+
+	while (time_before(jiffies, timeout)) {
+		ret = pci_user_read_config_word(dev, vpd->cap + PCI_VPD_ADDR,
+						&status);
+		if (ret < 0)
+			return ret;
+
+		if ((status & PCI_VPD_ADDR_F) == vpd->flag) {
+			vpd->busy = 0;
+			return 0;
+		}
+
+		if (fatal_signal_pending(current))
+			return -EINTR;
+
+		usleep_range(10, max_sleep);
+		if (max_sleep < 1024)
+			max_sleep *= 2;
+	}
+
+	pci_warn(dev, "VPD access failed.  This is likely a firmware bug on this device.  Contact the card vendor for a firmware update\n");
+	return -ETIMEDOUT;
+}
+
+static ssize_t pci_vpd_read(struct pci_dev *dev, loff_t pos, size_t count,
+			    void *arg)
+{
+	struct pci_vpd *vpd = dev->vpd;
+	int ret;
+	loff_t end = pos + count;
+	u8 *buf = arg;
+
+	if (pos < 0)
+		return -EINVAL;
+
+	if (!vpd->valid) {
+		vpd->valid = 1;
+		vpd->len = pci_vpd_size(dev, vpd->len);
+	}
+
+	if (vpd->len == 0)
+		return -EIO;
+
+	if (pos > vpd->len)
+		return 0;
+
+	if (end > vpd->len) {
+		end = vpd->len;
+		count = end - pos;
+	}
+
+	if (mutex_lock_killable(&vpd->lock))
+		return -EINTR;
+
+	ret = pci_vpd_wait(dev);
+	if (ret < 0)
+		goto out;
+
+	while (pos < end) {
+		u32 val;
+		unsigned int i, skip;
+
+		ret = pci_user_write_config_word(dev, vpd->cap + PCI_VPD_ADDR,
+						 pos & ~3);
+		if (ret < 0)
+			break;
+		vpd->busy = 1;
+		vpd->flag = PCI_VPD_ADDR_F;
+		ret = pci_vpd_wait(dev);
+		if (ret < 0)
+			break;
+
+		ret = pci_user_read_config_dword(dev, vpd->cap + PCI_VPD_DATA, &val);
+		if (ret < 0)
+			break;
+
+		skip = pos & 3;
+		for (i = 0;  i < sizeof(u32); i++) {
+			if (i >= skip) {
+				*buf++ = val;
+				if (++pos == end)
+					break;
+			}
+			val >>= 8;
+		}
+	}
+out:
+	mutex_unlock(&vpd->lock);
+	return ret ? ret : count;
+}
+
+static ssize_t pci_vpd_write(struct pci_dev *dev, loff_t pos, size_t count,
+			     const void *arg)
+{
+	struct pci_vpd *vpd = dev->vpd;
+	const u8 *buf = arg;
+	loff_t end = pos + count;
+	int ret = 0;
+
+	if (pos < 0 || (pos & 3) || (count & 3))
+		return -EINVAL;
+
+	if (!vpd->valid) {
+		vpd->valid = 1;
+		vpd->len = pci_vpd_size(dev, vpd->len);
+	}
+
+	if (vpd->len == 0)
+		return -EIO;
+
+	if (end > vpd->len)
+		return -EINVAL;
+
+	if (mutex_lock_killable(&vpd->lock))
+		return -EINTR;
+
+	ret = pci_vpd_wait(dev);
+	if (ret < 0)
+		goto out;
+
+	while (pos < end) {
+		u32 val;
+
+		val = *buf++;
+		val |= *buf++ << 8;
+		val |= *buf++ << 16;
+		val |= *buf++ << 24;
+
+		ret = pci_user_write_config_dword(dev, vpd->cap + PCI_VPD_DATA, val);
+		if (ret < 0)
+			break;
+		ret = pci_user_write_config_word(dev, vpd->cap + PCI_VPD_ADDR,
+						 pos | PCI_VPD_ADDR_F);
+		if (ret < 0)
+			break;
+
+		vpd->busy = 1;
+		vpd->flag = 0;
+		ret = pci_vpd_wait(dev);
+		if (ret < 0)
+			break;
+
+		pos += sizeof(u32);
+	}
+out:
+	mutex_unlock(&vpd->lock);
+	return ret ? ret : count;
+}
+
+static int pci_vpd_set_size(struct pci_dev *dev, size_t len)
+{
+	struct pci_vpd *vpd = dev->vpd;
+
+	if (len == 0 || len > PCI_VPD_MAX_SIZE)
+		return -EIO;
+
+	vpd->valid = 1;
+	vpd->len = len;
+
+	return 0;
+}
+
+static const struct pci_vpd_ops pci_vpd_ops = {
+	.read = pci_vpd_read,
+	.write = pci_vpd_write,
+	.set_size = pci_vpd_set_size,
+};
+
+static ssize_t pci_vpd_f0_read(struct pci_dev *dev, loff_t pos, size_t count,
+			       void *arg)
+{
+	struct pci_dev *tdev = pci_get_slot(dev->bus,
+					    PCI_DEVFN(PCI_SLOT(dev->devfn), 0));
+	ssize_t ret;
+
+	if (!tdev)
+		return -ENODEV;
+
+	ret = pci_read_vpd(tdev, pos, count, arg);
+	pci_dev_put(tdev);
+	return ret;
+}
+
+static ssize_t pci_vpd_f0_write(struct pci_dev *dev, loff_t pos, size_t count,
+				const void *arg)
+{
+	struct pci_dev *tdev = pci_get_slot(dev->bus,
+					    PCI_DEVFN(PCI_SLOT(dev->devfn), 0));
+	ssize_t ret;
+
+	if (!tdev)
+		return -ENODEV;
+
+	ret = pci_write_vpd(tdev, pos, count, arg);
+	pci_dev_put(tdev);
+	return ret;
+}
+
+static int pci_vpd_f0_set_size(struct pci_dev *dev, size_t len)
+{
+	struct pci_dev *tdev = pci_get_slot(dev->bus,
+					    PCI_DEVFN(PCI_SLOT(dev->devfn), 0));
+	int ret;
+
+	if (!tdev)
+		return -ENODEV;
+
+	ret = pci_set_vpd_size(tdev, len);
+	pci_dev_put(tdev);
+	return ret;
+}
+
+static const struct pci_vpd_ops pci_vpd_f0_ops = {
+	.read = pci_vpd_f0_read,
+	.write = pci_vpd_f0_write,
+	.set_size = pci_vpd_f0_set_size,
+};
+
+int pci_vpd_init(struct pci_dev *dev)
+{
+	struct pci_vpd *vpd;
+	u8 cap;
+
+	cap = pci_find_capability(dev, PCI_CAP_ID_VPD);
+	if (!cap)
+		return -ENODEV;
+
+	vpd = kzalloc(sizeof(*vpd), GFP_ATOMIC);
+	if (!vpd)
+		return -ENOMEM;
+
+	vpd->len = PCI_VPD_MAX_SIZE;
+	if (dev->dev_flags & PCI_DEV_FLAGS_VPD_REF_F0)
+		vpd->ops = &pci_vpd_f0_ops;
+	else
+		vpd->ops = &pci_vpd_ops;
+	mutex_init(&vpd->lock);
+	vpd->cap = cap;
+	vpd->busy = 0;
+	vpd->valid = 0;
+	dev->vpd = vpd;
+	return 0;
+}
+
+void pci_vpd_release(struct pci_dev *dev)
+{
+	kfree(dev->vpd);
+}
 
 int pci_vpd_find_tag(const u8 *buf, unsigned int off, unsigned int len, u8 rdt)
 {

[PATCH v1 2/4] PCI/VPD: Move VPD sysfs code to vpd.c

[Bjorn Helgaas]

From: Bjorn Helgaas <bhelgaas@google.com>

Move the VPD-related sysfs code from pci-sysfs.c to vpd.c.  This follows
the pattern of pcie_aspm_create_sysfs_dev_files().  The goal is to
encapsulate all the VPD code and structures in vpd.c.

No functional change intended.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
 drivers/pci/pci-sysfs.c |   67 ++---------------------------------------------
 drivers/pci/pci.h       |    2 +
 drivers/pci/vpd.c       |   67 +++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 72 insertions(+), 64 deletions(-)

diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c
index eb6bee8724cc..4415e624cf7e 100644
--- a/drivers/pci/pci-sysfs.c
+++ b/drivers/pci/pci-sysfs.c
@@ -982,38 +982,6 @@ static ssize_t pci_write_config(struct file *filp, struct kobject *kobj,
 	return count;
 }
 
-static ssize_t read_vpd_attr(struct file *filp, struct kobject *kobj,
-			     struct bin_attribute *bin_attr, char *buf,
-			     loff_t off, size_t count)
-{
-	struct pci_dev *dev = to_pci_dev(kobj_to_dev(kobj));
-
-	if (bin_attr->size > 0) {
-		if (off > bin_attr->size)
-			count = 0;
-		else if (count > bin_attr->size - off)
-			count = bin_attr->size - off;
-	}
-
-	return pci_read_vpd(dev, off, count, buf);
-}
-
-static ssize_t write_vpd_attr(struct file *filp, struct kobject *kobj,
-			      struct bin_attribute *bin_attr, char *buf,
-			      loff_t off, size_t count)
-{
-	struct pci_dev *dev = to_pci_dev(kobj_to_dev(kobj));
-
-	if (bin_attr->size > 0) {
-		if (off > bin_attr->size)
-			count = 0;
-		else if (count > bin_attr->size - off)
-			count = bin_attr->size - off;
-	}
-
-	return pci_write_vpd(dev, off, count, buf);
-}
-
 #ifdef HAVE_PCI_LEGACY
 /**
  * pci_read_legacy_io - read byte(s) from legacy I/O port space
@@ -1517,29 +1485,8 @@ static struct device_attribute reset_attr = __ATTR(reset, 0200, NULL, reset_stor
 static int pci_create_capabilities_sysfs(struct pci_dev *dev)
 {
 	int retval;
-	struct bin_attribute *attr;
-
-	/* If the device has VPD, try to expose it in sysfs. */
-	if (dev->vpd) {
-		attr = kzalloc(sizeof(*attr), GFP_ATOMIC);
-		if (!attr)
-			return -ENOMEM;
 
-		sysfs_bin_attr_init(attr);
-		attr->size = 0;
-		attr->attr.name = "vpd";
-		attr->attr.mode = S_IRUSR | S_IWUSR;
-		attr->read = read_vpd_attr;
-		attr->write = write_vpd_attr;
-		retval = sysfs_create_bin_file(&dev->dev.kobj, attr);
-		if (retval) {
-			kfree(attr);
-			return retval;
-		}
-		dev->vpd->attr = attr;
-	}
-
-	/* Active State Power Management */
+	pcie_vpd_create_sysfs_dev_files(dev);
 	pcie_aspm_create_sysfs_dev_files(dev);
 
 	if (!pci_probe_reset_function(dev)) {
@@ -1552,11 +1499,7 @@ static int pci_create_capabilities_sysfs(struct pci_dev *dev)
 
 error:
 	pcie_aspm_remove_sysfs_dev_files(dev);
-	if (dev->vpd && dev->vpd->attr) {
-		sysfs_remove_bin_file(&dev->dev.kobj, dev->vpd->attr);
-		kfree(dev->vpd->attr);
-	}
-
+	pcie_vpd_remove_sysfs_dev_files(dev);
 	return retval;
 }
 
@@ -1630,11 +1573,7 @@ int __must_check pci_create_sysfs_dev_files(struct pci_dev *pdev)
 
 static void pci_remove_capabilities_sysfs(struct pci_dev *dev)
 {
-	if (dev->vpd && dev->vpd->attr) {
-		sysfs_remove_bin_file(&dev->dev.kobj, dev->vpd->attr);
-		kfree(dev->vpd->attr);
-	}
-
+	pcie_vpd_remove_sysfs_dev_files(dev);
 	pcie_aspm_remove_sysfs_dev_files(dev);
 	if (dev->reset_fn) {
 		device_remove_file(&dev->dev, &reset_attr);
diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
index fcd81911b127..1191320a44d5 100644
--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -123,6 +123,8 @@ struct pci_vpd {
 
 int pci_vpd_init(struct pci_dev *dev);
 void pci_vpd_release(struct pci_dev *dev);
+void pcie_vpd_create_sysfs_dev_files(struct pci_dev *dev);
+void pcie_vpd_remove_sysfs_dev_files(struct pci_dev *dev);
 
 /* PCI /proc functions */
 #ifdef CONFIG_PROC_FS
diff --git a/drivers/pci/vpd.c b/drivers/pci/vpd.c
index 4596452d58bf..55477f24d8b9 100644
--- a/drivers/pci/vpd.c
+++ b/drivers/pci/vpd.c
@@ -378,6 +378,73 @@ void pci_vpd_release(struct pci_dev *dev)
 	kfree(dev->vpd);
 }
 
+static ssize_t read_vpd_attr(struct file *filp, struct kobject *kobj,
+			     struct bin_attribute *bin_attr, char *buf,
+			     loff_t off, size_t count)
+{
+	struct pci_dev *dev = to_pci_dev(kobj_to_dev(kobj));
+
+	if (bin_attr->size > 0) {
+		if (off > bin_attr->size)
+			count = 0;
+		else if (count > bin_attr->size - off)
+			count = bin_attr->size - off;
+	}
+
+	return pci_read_vpd(dev, off, count, buf);
+}
+
+static ssize_t write_vpd_attr(struct file *filp, struct kobject *kobj,
+			      struct bin_attribute *bin_attr, char *buf,
+			      loff_t off, size_t count)
+{
+	struct pci_dev *dev = to_pci_dev(kobj_to_dev(kobj));
+
+	if (bin_attr->size > 0) {
+		if (off > bin_attr->size)
+			count = 0;
+		else if (count > bin_attr->size - off)
+			count = bin_attr->size - off;
+	}
+
+	return pci_write_vpd(dev, off, count, buf);
+}
+
+void pcie_vpd_create_sysfs_dev_files(struct pci_dev *dev)
+{
+	int retval;
+	struct bin_attribute *attr;
+
+	if (!dev->vpd)
+		return;
+
+	attr = kzalloc(sizeof(*attr), GFP_ATOMIC);
+	if (!attr)
+		return;
+
+	sysfs_bin_attr_init(attr);
+	attr->size = 0;
+	attr->attr.name = "vpd";
+	attr->attr.mode = S_IRUSR | S_IWUSR;
+	attr->read = read_vpd_attr;
+	attr->write = write_vpd_attr;
+	retval = sysfs_create_bin_file(&dev->dev.kobj, attr);
+	if (retval) {
+		kfree(attr);
+		return;
+	}
+
+	dev->vpd->attr = attr;
+}
+
+void pcie_vpd_remove_sysfs_dev_files(struct pci_dev *dev)
+{
+	if (dev->vpd && dev->vpd->attr) {
+		sysfs_remove_bin_file(&dev->dev.kobj, dev->vpd->attr);
+		kfree(dev->vpd->attr);
+	}
+}
+
 int pci_vpd_find_tag(const u8 *buf, unsigned int off, unsigned int len, u8 rdt)
 {
 	int i;

[PATCH v1 3/4] PCI/VPD: Move VPD quirks to vpd.c

[Bjorn Helgaas]

From: Bjorn Helgaas <bhelgaas@google.com>

Move the VPD-related quirks from quirks.c to vpd.c, which removes the need
for struct pci_vpd outside vpd.c.  The goal is to encapsulate all the VPD
code and structures in vpd.c.

No functional change intended.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
 drivers/pci/quirks.c |  121 --------------------------------------------------
 drivers/pci/vpd.c    |  120 ++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 120 insertions(+), 121 deletions(-)

diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index fc734014206f..fbe1127086c8 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -1967,31 +1967,6 @@ static void quirk_netmos(struct pci_dev *dev)
 DECLARE_PCI_FIXUP_CLASS_HEADER(PCI_VENDOR_ID_NETMOS, PCI_ANY_ID,
 			 PCI_CLASS_COMMUNICATION_SERIAL, 8, quirk_netmos);
 
-/*
- * Quirk non-zero PCI functions to route VPD access through function 0 for
- * devices that share VPD resources between functions.  The functions are
- * expected to be identical devices.
- */
-static void quirk_f0_vpd_link(struct pci_dev *dev)
-{
-	struct pci_dev *f0;
-
-	if (!PCI_FUNC(dev->devfn))
-		return;
-
-	f0 = pci_get_slot(dev->bus, PCI_DEVFN(PCI_SLOT(dev->devfn), 0));
-	if (!f0)
-		return;
-
-	if (f0->vpd && dev->class == f0->class &&
-	    dev->vendor == f0->vendor && dev->device == f0->device)
-		dev->dev_flags |= PCI_DEV_FLAGS_VPD_REF_F0;
-
-	pci_dev_put(f0);
-}
-DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_INTEL, PCI_ANY_ID,
-			      PCI_CLASS_NETWORK_ETHERNET, 8, quirk_f0_vpd_link);
-
 static void quirk_e100_interrupt(struct pci_dev *dev)
 {
 	u16 command, pmcsr;
@@ -2182,83 +2157,6 @@ static void quirk_via_cx700_pci_parking_caching(struct pci_dev *dev)
 }
 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, 0x324e, quirk_via_cx700_pci_parking_caching);
 
-/*
- * If a device follows the VPD format spec, the PCI core will not read or
- * write past the VPD End Tag.  But some vendors do not follow the VPD
- * format spec, so we can't tell how much data is safe to access.  Devices
- * may behave unpredictably if we access too much.  Blacklist these devices
- * so we don't touch VPD at all.
- */
-static void quirk_blacklist_vpd(struct pci_dev *dev)
-{
-	if (dev->vpd) {
-		dev->vpd->len = 0;
-		pci_warn(dev, FW_BUG "disabling VPD access (can't determine size of non-standard VPD format)\n");
-	}
-}
-
-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_LSI_LOGIC, 0x0060, quirk_blacklist_vpd);
-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_LSI_LOGIC, 0x007c, quirk_blacklist_vpd);
-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_LSI_LOGIC, 0x0413, quirk_blacklist_vpd);
-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_LSI_LOGIC, 0x0078, quirk_blacklist_vpd);
-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_LSI_LOGIC, 0x0079, quirk_blacklist_vpd);
-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_LSI_LOGIC, 0x0073, quirk_blacklist_vpd);
-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_LSI_LOGIC, 0x0071, quirk_blacklist_vpd);
-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_LSI_LOGIC, 0x005b, quirk_blacklist_vpd);
-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_LSI_LOGIC, 0x002f, quirk_blacklist_vpd);
-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_LSI_LOGIC, 0x005d, quirk_blacklist_vpd);
-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_LSI_LOGIC, 0x005f, quirk_blacklist_vpd);
-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATTANSIC, PCI_ANY_ID,
-		quirk_blacklist_vpd);
-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_QLOGIC, 0x2261, quirk_blacklist_vpd);
-
-/*
- * For Broadcom 5706, 5708, 5709 rev. A nics, any read beyond the
- * VPD end tag will hang the device.  This problem was initially
- * observed when a vpd entry was created in sysfs
- * ('/sys/bus/pci/devices/<id>/vpd').   A read to this sysfs entry
- * will dump 32k of data.  Reading a full 32k will cause an access
- * beyond the VPD end tag causing the device to hang.  Once the device
- * is hung, the bnx2 driver will not be able to reset the device.
- * We believe that it is legal to read beyond the end tag and
- * therefore the solution is to limit the read/write length.
- */
-static void quirk_brcm_570x_limit_vpd(struct pci_dev *dev)
-{
-	/*
-	 * Only disable the VPD capability for 5706, 5706S, 5708,
-	 * 5708S and 5709 rev. A
-	 */
-	if ((dev->device == PCI_DEVICE_ID_NX2_5706) ||
-	    (dev->device == PCI_DEVICE_ID_NX2_5706S) ||
-	    (dev->device == PCI_DEVICE_ID_NX2_5708) ||
-	    (dev->device == PCI_DEVICE_ID_NX2_5708S) ||
-	    ((dev->device == PCI_DEVICE_ID_NX2_5709) &&
-	     (dev->revision & 0xf0) == 0x0)) {
-		if (dev->vpd)
-			dev->vpd->len = 0x80;
-	}
-}
-
-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_BROADCOM,
-			PCI_DEVICE_ID_NX2_5706,
-			quirk_brcm_570x_limit_vpd);
-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_BROADCOM,
-			PCI_DEVICE_ID_NX2_5706S,
-			quirk_brcm_570x_limit_vpd);
-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_BROADCOM,
-			PCI_DEVICE_ID_NX2_5708,
-			quirk_brcm_570x_limit_vpd);
-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_BROADCOM,
-			PCI_DEVICE_ID_NX2_5708S,
-			quirk_brcm_570x_limit_vpd);
-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_BROADCOM,
-			PCI_DEVICE_ID_NX2_5709,
-			quirk_brcm_570x_limit_vpd);
-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_BROADCOM,
-			PCI_DEVICE_ID_NX2_5709S,
-			quirk_brcm_570x_limit_vpd);
-
 static void quirk_brcm_5719_limit_mrrs(struct pci_dev *dev)
 {
 	u32 rev;
@@ -3417,25 +3315,6 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_CACTUS_RIDGE_4C
 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_PORT_RIDGE,
 			quirk_thunderbolt_hotplug_msi);
 
-static void quirk_chelsio_extend_vpd(struct pci_dev *dev)
-{
-	pci_set_vpd_size(dev, 8192);
-}
-
-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_CHELSIO, 0x20, quirk_chelsio_extend_vpd);
-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_CHELSIO, 0x21, quirk_chelsio_extend_vpd);
-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_CHELSIO, 0x22, quirk_chelsio_extend_vpd);
-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_CHELSIO, 0x23, quirk_chelsio_extend_vpd);
-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_CHELSIO, 0x24, quirk_chelsio_extend_vpd);
-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_CHELSIO, 0x25, quirk_chelsio_extend_vpd);
-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_CHELSIO, 0x26, quirk_chelsio_extend_vpd);
-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_CHELSIO, 0x30, quirk_chelsio_extend_vpd);
-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_CHELSIO, 0x31, quirk_chelsio_extend_vpd);
-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_CHELSIO, 0x32, quirk_chelsio_extend_vpd);
-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_CHELSIO, 0x35, quirk_chelsio_extend_vpd);
-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_CHELSIO, 0x36, quirk_chelsio_extend_vpd);
-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_CHELSIO, 0x37, quirk_chelsio_extend_vpd);
-
 #ifdef CONFIG_ACPI
 /*
  * Apple: Shutdown Cactus Ridge Thunderbolt controller.
diff --git a/drivers/pci/vpd.c b/drivers/pci/vpd.c
index 55477f24d8b9..901b0bedcc5d 100644
--- a/drivers/pci/vpd.c
+++ b/drivers/pci/vpd.c
@@ -497,3 +497,123 @@ int pci_vpd_find_info_keyword(const u8 *buf, unsigned int off,
 	return -ENOENT;
 }
 EXPORT_SYMBOL_GPL(pci_vpd_find_info_keyword);
+
+#ifdef CONFIG_PCI_QUIRKS
+/*
+ * Quirk non-zero PCI functions to route VPD access through function 0 for
+ * devices that share VPD resources between functions.  The functions are
+ * expected to be identical devices.
+ */
+static void quirk_f0_vpd_link(struct pci_dev *dev)
+{
+	struct pci_dev *f0;
+
+	if (!PCI_FUNC(dev->devfn))
+		return;
+
+	f0 = pci_get_slot(dev->bus, PCI_DEVFN(PCI_SLOT(dev->devfn), 0));
+	if (!f0)
+		return;
+
+	if (f0->vpd && dev->class == f0->class &&
+	    dev->vendor == f0->vendor && dev->device == f0->device)
+		dev->dev_flags |= PCI_DEV_FLAGS_VPD_REF_F0;
+
+	pci_dev_put(f0);
+}
+DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_INTEL, PCI_ANY_ID,
+			      PCI_CLASS_NETWORK_ETHERNET, 8, quirk_f0_vpd_link);
+
+/*
+ * If a device follows the VPD format spec, the PCI core will not read or
+ * write past the VPD End Tag.  But some vendors do not follow the VPD
+ * format spec, so we can't tell how much data is safe to access.  Devices
+ * may behave unpredictably if we access too much.  Blacklist these devices
+ * so we don't touch VPD at all.
+ */
+static void quirk_blacklist_vpd(struct pci_dev *dev)
+{
+	if (dev->vpd) {
+		dev->vpd->len = 0;
+		pci_warn(dev, FW_BUG "disabling VPD access (can't determine size of non-standard VPD format)\n");
+	}
+}
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_LSI_LOGIC, 0x0060, quirk_blacklist_vpd);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_LSI_LOGIC, 0x007c, quirk_blacklist_vpd);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_LSI_LOGIC, 0x0413, quirk_blacklist_vpd);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_LSI_LOGIC, 0x0078, quirk_blacklist_vpd);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_LSI_LOGIC, 0x0079, quirk_blacklist_vpd);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_LSI_LOGIC, 0x0073, quirk_blacklist_vpd);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_LSI_LOGIC, 0x0071, quirk_blacklist_vpd);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_LSI_LOGIC, 0x005b, quirk_blacklist_vpd);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_LSI_LOGIC, 0x002f, quirk_blacklist_vpd);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_LSI_LOGIC, 0x005d, quirk_blacklist_vpd);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_LSI_LOGIC, 0x005f, quirk_blacklist_vpd);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATTANSIC, PCI_ANY_ID,
+		quirk_blacklist_vpd);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_QLOGIC, 0x2261, quirk_blacklist_vpd);
+
+/*
+ * For Broadcom 5706, 5708, 5709 rev. A nics, any read beyond the
+ * VPD end tag will hang the device.  This problem was initially
+ * observed when a vpd entry was created in sysfs
+ * ('/sys/bus/pci/devices/<id>/vpd').   A read to this sysfs entry
+ * will dump 32k of data.  Reading a full 32k will cause an access
+ * beyond the VPD end tag causing the device to hang.  Once the device
+ * is hung, the bnx2 driver will not be able to reset the device.
+ * We believe that it is legal to read beyond the end tag and
+ * therefore the solution is to limit the read/write length.
+ */
+static void quirk_brcm_570x_limit_vpd(struct pci_dev *dev)
+{
+	/*
+	 * Only disable the VPD capability for 5706, 5706S, 5708,
+	 * 5708S and 5709 rev. A
+	 */
+	if ((dev->device == PCI_DEVICE_ID_NX2_5706) ||
+	    (dev->device == PCI_DEVICE_ID_NX2_5706S) ||
+	    (dev->device == PCI_DEVICE_ID_NX2_5708) ||
+	    (dev->device == PCI_DEVICE_ID_NX2_5708S) ||
+	    ((dev->device == PCI_DEVICE_ID_NX2_5709) &&
+	     (dev->revision & 0xf0) == 0x0)) {
+		if (dev->vpd)
+			dev->vpd->len = 0x80;
+	}
+}
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_BROADCOM,
+			PCI_DEVICE_ID_NX2_5706,
+			quirk_brcm_570x_limit_vpd);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_BROADCOM,
+			PCI_DEVICE_ID_NX2_5706S,
+			quirk_brcm_570x_limit_vpd);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_BROADCOM,
+			PCI_DEVICE_ID_NX2_5708,
+			quirk_brcm_570x_limit_vpd);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_BROADCOM,
+			PCI_DEVICE_ID_NX2_5708S,
+			quirk_brcm_570x_limit_vpd);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_BROADCOM,
+			PCI_DEVICE_ID_NX2_5709,
+			quirk_brcm_570x_limit_vpd);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_BROADCOM,
+			PCI_DEVICE_ID_NX2_5709S,
+			quirk_brcm_570x_limit_vpd);
+
+static void quirk_chelsio_extend_vpd(struct pci_dev *dev)
+{
+	pci_set_vpd_size(dev, 8192);
+}
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_CHELSIO, 0x20, quirk_chelsio_extend_vpd);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_CHELSIO, 0x21, quirk_chelsio_extend_vpd);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_CHELSIO, 0x22, quirk_chelsio_extend_vpd);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_CHELSIO, 0x23, quirk_chelsio_extend_vpd);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_CHELSIO, 0x24, quirk_chelsio_extend_vpd);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_CHELSIO, 0x25, quirk_chelsio_extend_vpd);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_CHELSIO, 0x26, quirk_chelsio_extend_vpd);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_CHELSIO, 0x30, quirk_chelsio_extend_vpd);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_CHELSIO, 0x31, quirk_chelsio_extend_vpd);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_CHELSIO, 0x32, quirk_chelsio_extend_vpd);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_CHELSIO, 0x35, quirk_chelsio_extend_vpd);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_CHELSIO, 0x36, quirk_chelsio_extend_vpd);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_CHELSIO, 0x37, quirk_chelsio_extend_vpd);
+#endif

[PATCH v1 4/4] PCI/VPD: Move VPD structures to vpd.c

[Bjorn Helgaas]

From: Bjorn Helgaas <bhelgaas@google.com>

The VPD-related structures are only used in vpd.c, so move them from
drivers/pci/pci.h to vpd.c.  No functional change intended.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
 drivers/pci/pci.h |   17 -----------------
 drivers/pci/vpd.c |   17 +++++++++++++++++
 2 files changed, 17 insertions(+), 17 deletions(-)

diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
index 1191320a44d5..9a41a6399967 100644
--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -104,23 +104,6 @@ static inline bool pci_power_manageable(struct pci_dev *pci_dev)
 	return !pci_has_subordinate(pci_dev) || pci_dev->bridge_d3;
 }
 
-struct pci_vpd_ops {
-	ssize_t (*read)(struct pci_dev *dev, loff_t pos, size_t count, void *buf);
-	ssize_t (*write)(struct pci_dev *dev, loff_t pos, size_t count, const void *buf);
-	int (*set_size)(struct pci_dev *dev, size_t len);
-};
-
-struct pci_vpd {
-	const struct pci_vpd_ops *ops;
-	struct bin_attribute *attr;	/* Descriptor for sysfs VPD entry */
-	struct mutex	lock;
-	unsigned int	len;
-	u16		flag;
-	u8		cap;
-	u8		busy:1;
-	u8		valid:1;
-};
-
 int pci_vpd_init(struct pci_dev *dev);
 void pci_vpd_release(struct pci_dev *dev);
 void pcie_vpd_create_sysfs_dev_files(struct pci_dev *dev);
diff --git a/drivers/pci/vpd.c b/drivers/pci/vpd.c
index 901b0bedcc5d..f24c3600be73 100644
--- a/drivers/pci/vpd.c
+++ b/drivers/pci/vpd.c
@@ -14,6 +14,23 @@
 
 /* VPD access through PCI 2.2+ VPD capability */
 
+struct pci_vpd_ops {
+	ssize_t (*read)(struct pci_dev *dev, loff_t pos, size_t count, void *buf);
+	ssize_t (*write)(struct pci_dev *dev, loff_t pos, size_t count, const void *buf);
+	int (*set_size)(struct pci_dev *dev, size_t len);
+};
+
+struct pci_vpd {
+	const struct pci_vpd_ops *ops;
+	struct bin_attribute *attr;	/* Descriptor for sysfs VPD entry */
+	struct mutex	lock;
+	unsigned int	len;
+	u16		flag;
+	u8		cap;
+	unsigned int	busy:1;
+	unsigned int	valid:1;
+};
+
 /**
  * pci_read_vpd - Read one entry from Vital Product Data
  * @dev:	pci device struct

Re: [PATCH v1 0/4] PCI/VPD: Encapsulate VPD stuff in vpd.c

[Bjorn Helgaas]

On Tue, Mar 13, 2018 at 05:26:14PM -0500, Bjorn Helgaas wrote:
> This is strictly cleanup, not intended to change or fix anything.
> 
> Move all the VPD-related code and structures to drivers/pci/vpd.c.
> 
> ---
> 
> Bjorn Helgaas (4):
>       PCI/VPD: Move VPD access code to vpd.c
>       PCI/VPD: Move VPD sysfs code to vpd.c
>       PCI/VPD: Move VPD quirks to vpd.c
>       PCI/VPD: Move VPD structures to vpd.c

Applied to pci/vpd for v4.17.