142 lines
3.4 KiB
C
142 lines
3.4 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright IBM Corp. 2012
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*
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* Author(s):
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* Jan Glauber <jang@linux.vnet.ibm.com>
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*/
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#define KMSG_COMPONENT "zpci"
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#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
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#include <linux/kernel.h>
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#include <linux/stat.h>
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#include <linux/pci.h>
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#include <asm/sclp.h>
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#define zpci_attr(name, fmt, member) \
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static ssize_t name##_show(struct device *dev, \
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struct device_attribute *attr, char *buf) \
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{ \
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struct zpci_dev *zdev = to_zpci(to_pci_dev(dev)); \
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\
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return sprintf(buf, fmt, zdev->member); \
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} \
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static DEVICE_ATTR_RO(name)
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zpci_attr(function_id, "0x%08x\n", fid);
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zpci_attr(function_handle, "0x%08x\n", fh);
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zpci_attr(pchid, "0x%04x\n", pchid);
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zpci_attr(pfgid, "0x%02x\n", pfgid);
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zpci_attr(vfn, "0x%04x\n", vfn);
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zpci_attr(pft, "0x%02x\n", pft);
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zpci_attr(uid, "0x%x\n", uid);
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zpci_attr(segment0, "0x%02x\n", pfip[0]);
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zpci_attr(segment1, "0x%02x\n", pfip[1]);
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zpci_attr(segment2, "0x%02x\n", pfip[2]);
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zpci_attr(segment3, "0x%02x\n", pfip[3]);
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static ssize_t recover_store(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct pci_dev *pdev = to_pci_dev(dev);
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struct zpci_dev *zdev = to_zpci(pdev);
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int ret;
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if (!device_remove_file_self(dev, attr))
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return count;
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pci_lock_rescan_remove();
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pci_stop_and_remove_bus_device(pdev);
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ret = zpci_disable_device(zdev);
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if (ret)
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goto error;
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ret = zpci_enable_device(zdev);
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if (ret)
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goto error;
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pci_rescan_bus(zdev->bus);
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pci_unlock_rescan_remove();
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return count;
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error:
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pci_unlock_rescan_remove();
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return ret;
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}
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static DEVICE_ATTR_WO(recover);
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static ssize_t util_string_read(struct file *filp, struct kobject *kobj,
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struct bin_attribute *attr, char *buf,
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loff_t off, size_t count)
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{
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struct device *dev = kobj_to_dev(kobj);
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struct pci_dev *pdev = to_pci_dev(dev);
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struct zpci_dev *zdev = to_zpci(pdev);
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return memory_read_from_buffer(buf, count, &off, zdev->util_str,
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sizeof(zdev->util_str));
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}
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static BIN_ATTR_RO(util_string, CLP_UTIL_STR_LEN);
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static ssize_t report_error_write(struct file *filp, struct kobject *kobj,
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struct bin_attribute *attr, char *buf,
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loff_t off, size_t count)
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{
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struct zpci_report_error_header *report = (void *) buf;
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struct device *dev = kobj_to_dev(kobj);
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struct pci_dev *pdev = to_pci_dev(dev);
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struct zpci_dev *zdev = to_zpci(pdev);
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int ret;
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if (off || (count < sizeof(*report)))
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return -EINVAL;
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ret = sclp_pci_report(report, zdev->fh, zdev->fid);
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return ret ? ret : count;
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}
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static BIN_ATTR(report_error, S_IWUSR, NULL, report_error_write, PAGE_SIZE);
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static struct bin_attribute *zpci_bin_attrs[] = {
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&bin_attr_util_string,
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&bin_attr_report_error,
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NULL,
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};
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static struct attribute *zpci_dev_attrs[] = {
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&dev_attr_function_id.attr,
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&dev_attr_function_handle.attr,
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&dev_attr_pchid.attr,
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&dev_attr_pfgid.attr,
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&dev_attr_pft.attr,
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&dev_attr_vfn.attr,
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&dev_attr_uid.attr,
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&dev_attr_recover.attr,
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NULL,
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};
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static struct attribute_group zpci_attr_group = {
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.attrs = zpci_dev_attrs,
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.bin_attrs = zpci_bin_attrs,
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};
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static struct attribute *pfip_attrs[] = {
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&dev_attr_segment0.attr,
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&dev_attr_segment1.attr,
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&dev_attr_segment2.attr,
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&dev_attr_segment3.attr,
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NULL,
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};
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static struct attribute_group pfip_attr_group = {
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.name = "pfip",
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.attrs = pfip_attrs,
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};
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const struct attribute_group *zpci_attr_groups[] = {
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&zpci_attr_group,
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&pfip_attr_group,
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NULL,
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};
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