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-rw-r--r--drivers/pci/access.c42
-rw-r--r--drivers/pci/pci.h1
2 files changed, 43 insertions, 0 deletions
diff --git a/drivers/pci/access.c b/drivers/pci/access.c
index 01b9d0a00abc..d11cdbb8fba3 100644
--- a/drivers/pci/access.c
+++ b/drivers/pci/access.c
@@ -275,6 +275,19 @@ ssize_t pci_write_vpd(struct pci_dev *dev, loff_t pos, size_t count, const void
}
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)
/**
@@ -498,9 +511,23 @@ out:
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,
@@ -533,9 +560,24 @@ static ssize_t pci_vpd_f0_write(struct pci_dev *dev, loff_t pos, size_t count,
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)
diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
index d0fb93481573..a814bbb80fcb 100644
--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -97,6 +97,7 @@ static inline bool pci_has_subordinate(struct pci_dev *pci_dev)
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 {