mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-26 19:00:25 +00:00
![Narendra K](/assets/img/avatar_default.png)
This patch exports SMBIOS provided firmware instance and label of onboard PCI devices to sysfs. New files are: /sys/bus/pci/devices/.../label which contains the firmware name for the device in question, and /sys/bus/pci/devices/.../index which contains the firmware device type instance for the given device. Signed-off-by: Jordan Hargrave <jordan_hargrave@dell.com> Signed-off-by: Narendra K <narendra_k@dell.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
143 lines
3.3 KiB
C
143 lines
3.3 KiB
C
/*
|
|
* Purpose: Export the firmware instance and label associated with
|
|
* a pci device to sysfs
|
|
* Copyright (C) 2010 Dell Inc.
|
|
* by Narendra K <Narendra_K@dell.com>,
|
|
* Jordan Hargrave <Jordan_Hargrave@dell.com>
|
|
*
|
|
* SMBIOS defines type 41 for onboard pci devices. This code retrieves
|
|
* the instance number and string from the type 41 record and exports
|
|
* it to sysfs.
|
|
*
|
|
* Please see http://linux.dell.com/wiki/index.php/Oss/libnetdevname for more
|
|
* information.
|
|
*/
|
|
|
|
#include <linux/dmi.h>
|
|
#include <linux/sysfs.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/pci_ids.h>
|
|
#include <linux/module.h>
|
|
#include <linux/device.h>
|
|
#include "pci.h"
|
|
|
|
enum smbios_attr_enum {
|
|
SMBIOS_ATTR_NONE = 0,
|
|
SMBIOS_ATTR_LABEL_SHOW,
|
|
SMBIOS_ATTR_INSTANCE_SHOW,
|
|
};
|
|
|
|
static mode_t
|
|
find_smbios_instance_string(struct pci_dev *pdev, char *buf,
|
|
enum smbios_attr_enum attribute)
|
|
{
|
|
const struct dmi_device *dmi;
|
|
struct dmi_dev_onboard *donboard;
|
|
int bus;
|
|
int devfn;
|
|
|
|
bus = pdev->bus->number;
|
|
devfn = pdev->devfn;
|
|
|
|
dmi = NULL;
|
|
while ((dmi = dmi_find_device(DMI_DEV_TYPE_DEV_ONBOARD,
|
|
NULL, dmi)) != NULL) {
|
|
donboard = dmi->device_data;
|
|
if (donboard && donboard->bus == bus &&
|
|
donboard->devfn == devfn) {
|
|
if (buf) {
|
|
if (attribute == SMBIOS_ATTR_INSTANCE_SHOW)
|
|
return scnprintf(buf, PAGE_SIZE,
|
|
"%d\n",
|
|
donboard->instance);
|
|
else if (attribute == SMBIOS_ATTR_LABEL_SHOW)
|
|
return scnprintf(buf, PAGE_SIZE,
|
|
"%s\n",
|
|
dmi->name);
|
|
}
|
|
return strlen(dmi->name);
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static mode_t
|
|
smbios_instance_string_exist(struct kobject *kobj, struct attribute *attr,
|
|
int n)
|
|
{
|
|
struct device *dev;
|
|
struct pci_dev *pdev;
|
|
|
|
dev = container_of(kobj, struct device, kobj);
|
|
pdev = to_pci_dev(dev);
|
|
|
|
return find_smbios_instance_string(pdev, NULL, SMBIOS_ATTR_NONE) ?
|
|
S_IRUGO : 0;
|
|
}
|
|
|
|
static ssize_t
|
|
smbioslabel_show(struct device *dev, struct device_attribute *attr, char *buf)
|
|
{
|
|
struct pci_dev *pdev;
|
|
pdev = to_pci_dev(dev);
|
|
|
|
return find_smbios_instance_string(pdev, buf,
|
|
SMBIOS_ATTR_LABEL_SHOW);
|
|
}
|
|
|
|
static ssize_t
|
|
smbiosinstance_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct pci_dev *pdev;
|
|
pdev = to_pci_dev(dev);
|
|
|
|
return find_smbios_instance_string(pdev, buf,
|
|
SMBIOS_ATTR_INSTANCE_SHOW);
|
|
}
|
|
|
|
static struct device_attribute smbios_attr_label = {
|
|
.attr = {.name = "label", .mode = 0444, .owner = THIS_MODULE},
|
|
.show = smbioslabel_show,
|
|
};
|
|
|
|
static struct device_attribute smbios_attr_instance = {
|
|
.attr = {.name = "index", .mode = 0444, .owner = THIS_MODULE},
|
|
.show = smbiosinstance_show,
|
|
};
|
|
|
|
static struct attribute *smbios_attributes[] = {
|
|
&smbios_attr_label.attr,
|
|
&smbios_attr_instance.attr,
|
|
NULL,
|
|
};
|
|
|
|
static struct attribute_group smbios_attr_group = {
|
|
.attrs = smbios_attributes,
|
|
.is_visible = smbios_instance_string_exist,
|
|
};
|
|
|
|
static int
|
|
pci_create_smbiosname_file(struct pci_dev *pdev)
|
|
{
|
|
if (!sysfs_create_group(&pdev->dev.kobj, &smbios_attr_group))
|
|
return 0;
|
|
return -ENODEV;
|
|
}
|
|
|
|
static void
|
|
pci_remove_smbiosname_file(struct pci_dev *pdev)
|
|
{
|
|
sysfs_remove_group(&pdev->dev.kobj, &smbios_attr_group);
|
|
}
|
|
|
|
void pci_create_firmware_label_files(struct pci_dev *pdev)
|
|
{
|
|
if (!pci_create_smbiosname_file(pdev))
|
|
;
|
|
}
|
|
|
|
void pci_remove_firmware_label_files(struct pci_dev *pdev)
|
|
{
|
|
pci_remove_smbiosname_file(pdev);
|
|
}
|