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/*
* Copyright IBM Corp. 2012
*
* Author(s):
* Jan Glauber <jang@linux.vnet.ibm.com>
*/
#define COMPONENT "zPCI"
#define pr_fmt(fmt) COMPONENT ": " fmt
#include <linux/kernel.h>
#include <linux/stat.h>
#include <linux/pci.h>
static ssize_t show_fid(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct zpci_dev *zdev = get_zdev(to_pci_dev(dev));
return sprintf(buf, "0x%08x\n", zdev->fid);
}
static DEVICE_ATTR(function_id, S_IRUGO, show_fid, NULL);
static ssize_t show_fh(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct zpci_dev *zdev = get_zdev(to_pci_dev(dev));
return sprintf(buf, "0x%08x\n", zdev->fh);
}
static DEVICE_ATTR(function_handle, S_IRUGO, show_fh, NULL);
static ssize_t show_pchid(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct zpci_dev *zdev = get_zdev(to_pci_dev(dev));
return sprintf(buf, "0x%04x\n", zdev->pchid);
}
static DEVICE_ATTR(pchid, S_IRUGO, show_pchid, NULL);
static ssize_t show_pfgid(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct zpci_dev *zdev = get_zdev(to_pci_dev(dev));
return sprintf(buf, "0x%02x\n", zdev->pfgid);
}
static DEVICE_ATTR(pfgid, S_IRUGO, show_pfgid, NULL);
static void recover_callback(struct device *dev)
{
struct pci_dev *pdev = to_pci_dev(dev);
struct zpci_dev *zdev = get_zdev(pdev);
int ret;
pci_stop_and_remove_bus_device(pdev);
ret = zpci_disable_device(zdev);
if (ret)
return;
ret = zpci_enable_device(zdev);
if (ret)
return;
pci_rescan_bus(zdev->bus);
}
static ssize_t store_recover(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
int rc = device_schedule_callback(dev, recover_callback);
return rc ? rc : count;
}
static DEVICE_ATTR(recover, S_IWUSR, NULL, store_recover);
static struct device_attribute *zpci_dev_attrs[] = {
&dev_attr_function_id,
&dev_attr_function_handle,
&dev_attr_pchid,
&dev_attr_pfgid,
&dev_attr_recover,
NULL,
};
int zpci_sysfs_add_device(struct device *dev)
{
int i, rc = 0;
for (i = 0; zpci_dev_attrs[i]; i++) {
rc = device_create_file(dev, zpci_dev_attrs[i]);
if (rc)
goto error;
}
return 0;
error:
while (--i >= 0)
device_remove_file(dev, zpci_dev_attrs[i]);
return rc;
}
void zpci_sysfs_remove_device(struct device *dev)
{
int i;
for (i = 0; zpci_dev_attrs[i]; i++)
device_remove_file(dev, zpci_dev_attrs[i]);
}
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