From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stephen Hemminger Subject: [PATCH 3/9] PCI: add interface to set visible size of VPD (rev3) Date: Mon, 13 Oct 2008 13:13:05 -0700 Message-ID: <20081013201452.870891660@vyatta.com> References: <20081013201302.899587376@vyatta.com> Cc: netdev@vger.kernel.org, linux-pci@vger.kernel.org To: David Miller , Jeff Garzik Return-path: Content-Disposition: inline; filename=vpd-size.patch Sender: linux-pci-owner@vger.kernel.org List-Id: netdev.vger.kernel.org The VPD on all devices may not really be 32K. Unfortunately, there is no generic way to find the size, so this adds a simple API hook to resize it. Signed-off-by: Stephen Hemminger --- drivers/pci/access.c | 23 +++++++++++++++++++++++ include/linux/pci.h | 1 + 2 files changed, 24 insertions(+) --- a/drivers/pci/access.c 2008-10-13 13:03:58.000000000 -0700 +++ b/drivers/pci/access.c 2008-10-13 13:04:01.000000000 -0700 @@ -340,6 +340,29 @@ int pci_vpd_pci22_init(struct pci_dev *d } /** + * pci_vpd_truncate - Set available Vital Product Data size + * @dev: pci device struct + * @size: available memory in bytes + * + * Adjust size of available VPD area. + */ +int pci_vpd_truncate(struct pci_dev *dev, size_t size) +{ + if (!dev->vpd) + return -EINVAL; + + /* limited by the access method */ + if (size > dev->vpd->len) + return -EINVAL; + + dev->vpd->len = size; + dev->vpd->attr->size = size; + + return 0; +} +EXPORT_SYMBOL(pci_vpd_truncate); + +/** * pci_block_user_cfg_access - Block userspace PCI config reads/writes * @dev: pci device struct * --- a/include/linux/pci.h 2008-10-13 13:03:58.000000000 -0700 +++ b/include/linux/pci.h 2008-10-13 13:04:01.000000000 -0700 @@ -653,6 +653,7 @@ int pci_bus_find_capability(struct pci_b /* Vital product data routines */ ssize_t pci_read_vpd(struct pci_dev *dev, loff_t pos, size_t count, void *buf); ssize_t pci_write_vpd(struct pci_dev *dev, loff_t pos, size_t count, const void *buf); +int pci_vpd_truncate(struct pci_dev *dev, size_t size); /* Helper functions for low-level code (drivers/pci/setup-[bus,res].c) */ void pci_bus_assign_resources(struct pci_bus *bus); --