mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-27 17:59:33 +07:00
c828a89203
Convert DEVICE_ATTR uses to DEVICE_ATTR_RO where possible. Done with perl script: $ git grep -w --name-only DEVICE_ATTR | \ xargs perl -i -e 'local $/; while (<>) { s/\bDEVICE_ATTR\s*\(\s*(\w+)\s*,\s*\(?(?:\s*S_IRUGO\s*|\s*0444\s*)\)?\s*,\s*\1_show\s*,\s*NULL\s*\)/DEVICE_ATTR_RO(\1)/g; print;}' Signed-off-by: Joe Perches <joe@perches.com> Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Acked-by: Robert Jarzmik <robert.jarzmik@free.fr> Acked-by: Sagi Grimberg <sagi@grimberg.me> Acked-by: Zhang Rui <rui.zhang@intel.com> Acked-by: Harald Freudenberger <freude@linux.vnet.ibm.com> Acked-by: Jani Nikula <jani.nikula@intel.com> Acked-by: Corey Minyard <cminyard@mvista.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
648 lines
17 KiB
C
648 lines
17 KiB
C
/*
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* drivers/acpi/device_sysfs.c - ACPI device sysfs attributes and modalias.
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*
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* Copyright (C) 2015, Intel Corp.
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* Author: Mika Westerberg <mika.westerberg@linux.intel.com>
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* Author: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as published
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* by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*/
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#include <linux/acpi.h>
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#include <linux/device.h>
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#include <linux/export.h>
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#include <linux/nls.h>
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#include "internal.h"
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static ssize_t acpi_object_path(acpi_handle handle, char *buf)
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{
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struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL};
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int result;
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result = acpi_get_name(handle, ACPI_FULL_PATHNAME, &path);
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if (result)
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return result;
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result = sprintf(buf, "%s\n", (char *)path.pointer);
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kfree(path.pointer);
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return result;
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}
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struct acpi_data_node_attr {
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struct attribute attr;
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ssize_t (*show)(struct acpi_data_node *, char *);
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ssize_t (*store)(struct acpi_data_node *, const char *, size_t count);
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};
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#define DATA_NODE_ATTR(_name) \
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static struct acpi_data_node_attr data_node_##_name = \
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__ATTR(_name, 0444, data_node_show_##_name, NULL)
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static ssize_t data_node_show_path(struct acpi_data_node *dn, char *buf)
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{
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return dn->handle ? acpi_object_path(dn->handle, buf) : 0;
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}
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DATA_NODE_ATTR(path);
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static struct attribute *acpi_data_node_default_attrs[] = {
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&data_node_path.attr,
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NULL
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};
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#define to_data_node(k) container_of(k, struct acpi_data_node, kobj)
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#define to_attr(a) container_of(a, struct acpi_data_node_attr, attr)
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static ssize_t acpi_data_node_attr_show(struct kobject *kobj,
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struct attribute *attr, char *buf)
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{
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struct acpi_data_node *dn = to_data_node(kobj);
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struct acpi_data_node_attr *dn_attr = to_attr(attr);
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return dn_attr->show ? dn_attr->show(dn, buf) : -ENXIO;
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}
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static const struct sysfs_ops acpi_data_node_sysfs_ops = {
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.show = acpi_data_node_attr_show,
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};
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static void acpi_data_node_release(struct kobject *kobj)
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{
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struct acpi_data_node *dn = to_data_node(kobj);
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complete(&dn->kobj_done);
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}
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static struct kobj_type acpi_data_node_ktype = {
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.sysfs_ops = &acpi_data_node_sysfs_ops,
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.default_attrs = acpi_data_node_default_attrs,
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.release = acpi_data_node_release,
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};
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static void acpi_expose_nondev_subnodes(struct kobject *kobj,
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struct acpi_device_data *data)
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{
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struct list_head *list = &data->subnodes;
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struct acpi_data_node *dn;
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if (list_empty(list))
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return;
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list_for_each_entry(dn, list, sibling) {
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int ret;
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init_completion(&dn->kobj_done);
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ret = kobject_init_and_add(&dn->kobj, &acpi_data_node_ktype,
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kobj, "%s", dn->name);
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if (!ret)
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acpi_expose_nondev_subnodes(&dn->kobj, &dn->data);
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else if (dn->handle)
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acpi_handle_err(dn->handle, "Failed to expose (%d)\n", ret);
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}
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}
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static void acpi_hide_nondev_subnodes(struct acpi_device_data *data)
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{
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struct list_head *list = &data->subnodes;
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struct acpi_data_node *dn;
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if (list_empty(list))
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return;
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list_for_each_entry_reverse(dn, list, sibling) {
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acpi_hide_nondev_subnodes(&dn->data);
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kobject_put(&dn->kobj);
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}
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}
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/**
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* create_pnp_modalias - Create hid/cid(s) string for modalias and uevent
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* @acpi_dev: ACPI device object.
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* @modalias: Buffer to print into.
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* @size: Size of the buffer.
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*
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* Creates hid/cid(s) string needed for modalias and uevent
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* e.g. on a device with hid:IBM0001 and cid:ACPI0001 you get:
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* char *modalias: "acpi:IBM0001:ACPI0001"
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* Return: 0: no _HID and no _CID
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* -EINVAL: output error
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* -ENOMEM: output is truncated
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*/
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static int create_pnp_modalias(struct acpi_device *acpi_dev, char *modalias,
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int size)
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{
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int len;
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int count;
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struct acpi_hardware_id *id;
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/* Avoid unnecessarily loading modules for non present devices. */
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if (!acpi_device_is_present(acpi_dev))
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return 0;
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/*
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* Since we skip ACPI_DT_NAMESPACE_HID from the modalias below, 0 should
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* be returned if ACPI_DT_NAMESPACE_HID is the only ACPI/PNP ID in the
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* device's list.
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*/
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count = 0;
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list_for_each_entry(id, &acpi_dev->pnp.ids, list)
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if (strcmp(id->id, ACPI_DT_NAMESPACE_HID))
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count++;
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if (!count)
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return 0;
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len = snprintf(modalias, size, "acpi:");
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if (len <= 0)
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return len;
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size -= len;
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list_for_each_entry(id, &acpi_dev->pnp.ids, list) {
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if (!strcmp(id->id, ACPI_DT_NAMESPACE_HID))
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continue;
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count = snprintf(&modalias[len], size, "%s:", id->id);
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if (count < 0)
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return -EINVAL;
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if (count >= size)
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return -ENOMEM;
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len += count;
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size -= count;
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}
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modalias[len] = '\0';
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return len;
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}
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/**
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* create_of_modalias - Creates DT compatible string for modalias and uevent
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* @acpi_dev: ACPI device object.
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* @modalias: Buffer to print into.
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* @size: Size of the buffer.
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*
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* Expose DT compatible modalias as of:NnameTCcompatible. This function should
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* only be called for devices having ACPI_DT_NAMESPACE_HID in their list of
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* ACPI/PNP IDs.
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*/
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static int create_of_modalias(struct acpi_device *acpi_dev, char *modalias,
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int size)
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{
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struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER };
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const union acpi_object *of_compatible, *obj;
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int len, count;
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int i, nval;
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char *c;
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acpi_get_name(acpi_dev->handle, ACPI_SINGLE_NAME, &buf);
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/* DT strings are all in lower case */
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for (c = buf.pointer; *c != '\0'; c++)
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*c = tolower(*c);
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len = snprintf(modalias, size, "of:N%sT", (char *)buf.pointer);
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ACPI_FREE(buf.pointer);
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if (len <= 0)
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return len;
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of_compatible = acpi_dev->data.of_compatible;
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if (of_compatible->type == ACPI_TYPE_PACKAGE) {
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nval = of_compatible->package.count;
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obj = of_compatible->package.elements;
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} else { /* Must be ACPI_TYPE_STRING. */
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nval = 1;
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obj = of_compatible;
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}
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for (i = 0; i < nval; i++, obj++) {
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count = snprintf(&modalias[len], size, "C%s",
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obj->string.pointer);
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if (count < 0)
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return -EINVAL;
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if (count >= size)
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return -ENOMEM;
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len += count;
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size -= count;
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}
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modalias[len] = '\0';
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return len;
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}
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int __acpi_device_uevent_modalias(struct acpi_device *adev,
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struct kobj_uevent_env *env)
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{
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int len;
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if (!adev)
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return -ENODEV;
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if (list_empty(&adev->pnp.ids))
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return 0;
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if (add_uevent_var(env, "MODALIAS="))
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return -ENOMEM;
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len = create_pnp_modalias(adev, &env->buf[env->buflen - 1],
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sizeof(env->buf) - env->buflen);
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if (len < 0)
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return len;
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env->buflen += len;
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if (!adev->data.of_compatible)
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return 0;
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if (len > 0 && add_uevent_var(env, "MODALIAS="))
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return -ENOMEM;
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len = create_of_modalias(adev, &env->buf[env->buflen - 1],
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sizeof(env->buf) - env->buflen);
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if (len < 0)
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return len;
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env->buflen += len;
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return 0;
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}
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/**
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* acpi_device_uevent_modalias - uevent modalias for ACPI-enumerated devices.
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*
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* Create the uevent modalias field for ACPI-enumerated devices.
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*
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* Because other buses do not support ACPI HIDs & CIDs, e.g. for a device with
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* hid:IBM0001 and cid:ACPI0001 you get: "acpi:IBM0001:ACPI0001".
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*/
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int acpi_device_uevent_modalias(struct device *dev, struct kobj_uevent_env *env)
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{
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return __acpi_device_uevent_modalias(acpi_companion_match(dev), env);
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}
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EXPORT_SYMBOL_GPL(acpi_device_uevent_modalias);
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static int __acpi_device_modalias(struct acpi_device *adev, char *buf, int size)
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{
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int len, count;
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if (!adev)
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return -ENODEV;
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if (list_empty(&adev->pnp.ids))
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return 0;
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len = create_pnp_modalias(adev, buf, size - 1);
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if (len < 0) {
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return len;
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} else if (len > 0) {
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buf[len++] = '\n';
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size -= len;
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}
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if (!adev->data.of_compatible)
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return len;
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count = create_of_modalias(adev, buf + len, size - 1);
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if (count < 0) {
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return count;
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} else if (count > 0) {
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len += count;
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buf[len++] = '\n';
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}
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return len;
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}
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/**
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* acpi_device_modalias - modalias sysfs attribute for ACPI-enumerated devices.
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*
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* Create the modalias sysfs attribute for ACPI-enumerated devices.
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*
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* Because other buses do not support ACPI HIDs & CIDs, e.g. for a device with
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* hid:IBM0001 and cid:ACPI0001 you get: "acpi:IBM0001:ACPI0001".
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*/
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int acpi_device_modalias(struct device *dev, char *buf, int size)
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{
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return __acpi_device_modalias(acpi_companion_match(dev), buf, size);
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}
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EXPORT_SYMBOL_GPL(acpi_device_modalias);
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static ssize_t
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acpi_device_modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
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{
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return __acpi_device_modalias(to_acpi_device(dev), buf, 1024);
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}
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static DEVICE_ATTR(modalias, 0444, acpi_device_modalias_show, NULL);
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static ssize_t real_power_state_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct acpi_device *adev = to_acpi_device(dev);
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int state;
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int ret;
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ret = acpi_device_get_power(adev, &state);
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if (ret)
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return ret;
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return sprintf(buf, "%s\n", acpi_power_state_string(state));
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}
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static DEVICE_ATTR_RO(real_power_state);
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static ssize_t power_state_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct acpi_device *adev = to_acpi_device(dev);
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return sprintf(buf, "%s\n", acpi_power_state_string(adev->power.state));
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}
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static DEVICE_ATTR_RO(power_state);
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static ssize_t
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acpi_eject_store(struct device *d, struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct acpi_device *acpi_device = to_acpi_device(d);
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acpi_object_type not_used;
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acpi_status status;
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if (!count || buf[0] != '1')
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return -EINVAL;
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if ((!acpi_device->handler || !acpi_device->handler->hotplug.enabled)
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&& !acpi_device->driver)
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return -ENODEV;
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status = acpi_get_type(acpi_device->handle, ¬_used);
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if (ACPI_FAILURE(status) || !acpi_device->flags.ejectable)
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return -ENODEV;
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get_device(&acpi_device->dev);
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status = acpi_hotplug_schedule(acpi_device, ACPI_OST_EC_OSPM_EJECT);
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if (ACPI_SUCCESS(status))
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return count;
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put_device(&acpi_device->dev);
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acpi_evaluate_ost(acpi_device->handle, ACPI_OST_EC_OSPM_EJECT,
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ACPI_OST_SC_NON_SPECIFIC_FAILURE, NULL);
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return status == AE_NO_MEMORY ? -ENOMEM : -EAGAIN;
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}
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static DEVICE_ATTR(eject, 0200, NULL, acpi_eject_store);
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static ssize_t
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acpi_device_hid_show(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct acpi_device *acpi_dev = to_acpi_device(dev);
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return sprintf(buf, "%s\n", acpi_device_hid(acpi_dev));
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}
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static DEVICE_ATTR(hid, 0444, acpi_device_hid_show, NULL);
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static ssize_t acpi_device_uid_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct acpi_device *acpi_dev = to_acpi_device(dev);
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return sprintf(buf, "%s\n", acpi_dev->pnp.unique_id);
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}
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static DEVICE_ATTR(uid, 0444, acpi_device_uid_show, NULL);
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static ssize_t acpi_device_adr_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct acpi_device *acpi_dev = to_acpi_device(dev);
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return sprintf(buf, "0x%08x\n",
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(unsigned int)(acpi_dev->pnp.bus_address));
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}
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static DEVICE_ATTR(adr, 0444, acpi_device_adr_show, NULL);
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static ssize_t acpi_device_path_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct acpi_device *acpi_dev = to_acpi_device(dev);
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return acpi_object_path(acpi_dev->handle, buf);
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}
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static DEVICE_ATTR(path, 0444, acpi_device_path_show, NULL);
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/* sysfs file that shows description text from the ACPI _STR method */
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static ssize_t description_show(struct device *dev,
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struct device_attribute *attr,
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char *buf) {
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struct acpi_device *acpi_dev = to_acpi_device(dev);
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int result;
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if (acpi_dev->pnp.str_obj == NULL)
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return 0;
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/*
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* The _STR object contains a Unicode identifier for a device.
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* We need to convert to utf-8 so it can be displayed.
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*/
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result = utf16s_to_utf8s(
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(wchar_t *)acpi_dev->pnp.str_obj->buffer.pointer,
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acpi_dev->pnp.str_obj->buffer.length,
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UTF16_LITTLE_ENDIAN, buf,
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PAGE_SIZE);
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buf[result++] = '\n';
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return result;
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}
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static DEVICE_ATTR_RO(description);
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static ssize_t
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acpi_device_sun_show(struct device *dev, struct device_attribute *attr,
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char *buf) {
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struct acpi_device *acpi_dev = to_acpi_device(dev);
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acpi_status status;
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unsigned long long sun;
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status = acpi_evaluate_integer(acpi_dev->handle, "_SUN", NULL, &sun);
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if (ACPI_FAILURE(status))
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return -EIO;
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return sprintf(buf, "%llu\n", sun);
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}
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static DEVICE_ATTR(sun, 0444, acpi_device_sun_show, NULL);
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|
|
static ssize_t
|
|
acpi_device_hrv_show(struct device *dev, struct device_attribute *attr,
|
|
char *buf) {
|
|
struct acpi_device *acpi_dev = to_acpi_device(dev);
|
|
acpi_status status;
|
|
unsigned long long hrv;
|
|
|
|
status = acpi_evaluate_integer(acpi_dev->handle, "_HRV", NULL, &hrv);
|
|
if (ACPI_FAILURE(status))
|
|
return -EIO;
|
|
|
|
return sprintf(buf, "%llu\n", hrv);
|
|
}
|
|
static DEVICE_ATTR(hrv, 0444, acpi_device_hrv_show, NULL);
|
|
|
|
static ssize_t status_show(struct device *dev, struct device_attribute *attr,
|
|
char *buf) {
|
|
struct acpi_device *acpi_dev = to_acpi_device(dev);
|
|
acpi_status status;
|
|
unsigned long long sta;
|
|
|
|
status = acpi_evaluate_integer(acpi_dev->handle, "_STA", NULL, &sta);
|
|
if (ACPI_FAILURE(status))
|
|
return -EIO;
|
|
|
|
return sprintf(buf, "%llu\n", sta);
|
|
}
|
|
static DEVICE_ATTR_RO(status);
|
|
|
|
/**
|
|
* acpi_device_setup_files - Create sysfs attributes of an ACPI device.
|
|
* @dev: ACPI device object.
|
|
*/
|
|
int acpi_device_setup_files(struct acpi_device *dev)
|
|
{
|
|
struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
|
|
acpi_status status;
|
|
int result = 0;
|
|
|
|
/*
|
|
* Devices gotten from FADT don't have a "path" attribute
|
|
*/
|
|
if (dev->handle) {
|
|
result = device_create_file(&dev->dev, &dev_attr_path);
|
|
if (result)
|
|
goto end;
|
|
}
|
|
|
|
if (!list_empty(&dev->pnp.ids)) {
|
|
result = device_create_file(&dev->dev, &dev_attr_hid);
|
|
if (result)
|
|
goto end;
|
|
|
|
result = device_create_file(&dev->dev, &dev_attr_modalias);
|
|
if (result)
|
|
goto end;
|
|
}
|
|
|
|
/*
|
|
* If device has _STR, 'description' file is created
|
|
*/
|
|
if (acpi_has_method(dev->handle, "_STR")) {
|
|
status = acpi_evaluate_object(dev->handle, "_STR",
|
|
NULL, &buffer);
|
|
if (ACPI_FAILURE(status))
|
|
buffer.pointer = NULL;
|
|
dev->pnp.str_obj = buffer.pointer;
|
|
result = device_create_file(&dev->dev, &dev_attr_description);
|
|
if (result)
|
|
goto end;
|
|
}
|
|
|
|
if (dev->pnp.type.bus_address)
|
|
result = device_create_file(&dev->dev, &dev_attr_adr);
|
|
if (dev->pnp.unique_id)
|
|
result = device_create_file(&dev->dev, &dev_attr_uid);
|
|
|
|
if (acpi_has_method(dev->handle, "_SUN")) {
|
|
result = device_create_file(&dev->dev, &dev_attr_sun);
|
|
if (result)
|
|
goto end;
|
|
}
|
|
|
|
if (acpi_has_method(dev->handle, "_HRV")) {
|
|
result = device_create_file(&dev->dev, &dev_attr_hrv);
|
|
if (result)
|
|
goto end;
|
|
}
|
|
|
|
if (acpi_has_method(dev->handle, "_STA")) {
|
|
result = device_create_file(&dev->dev, &dev_attr_status);
|
|
if (result)
|
|
goto end;
|
|
}
|
|
|
|
/*
|
|
* If device has _EJ0, 'eject' file is created that is used to trigger
|
|
* hot-removal function from userland.
|
|
*/
|
|
if (acpi_has_method(dev->handle, "_EJ0")) {
|
|
result = device_create_file(&dev->dev, &dev_attr_eject);
|
|
if (result)
|
|
return result;
|
|
}
|
|
|
|
if (dev->flags.power_manageable) {
|
|
result = device_create_file(&dev->dev, &dev_attr_power_state);
|
|
if (result)
|
|
return result;
|
|
|
|
if (dev->power.flags.power_resources)
|
|
result = device_create_file(&dev->dev,
|
|
&dev_attr_real_power_state);
|
|
}
|
|
|
|
acpi_expose_nondev_subnodes(&dev->dev.kobj, &dev->data);
|
|
|
|
end:
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* acpi_device_remove_files - Remove sysfs attributes of an ACPI device.
|
|
* @dev: ACPI device object.
|
|
*/
|
|
void acpi_device_remove_files(struct acpi_device *dev)
|
|
{
|
|
acpi_hide_nondev_subnodes(&dev->data);
|
|
|
|
if (dev->flags.power_manageable) {
|
|
device_remove_file(&dev->dev, &dev_attr_power_state);
|
|
if (dev->power.flags.power_resources)
|
|
device_remove_file(&dev->dev,
|
|
&dev_attr_real_power_state);
|
|
}
|
|
|
|
/*
|
|
* If device has _STR, remove 'description' file
|
|
*/
|
|
if (acpi_has_method(dev->handle, "_STR")) {
|
|
kfree(dev->pnp.str_obj);
|
|
device_remove_file(&dev->dev, &dev_attr_description);
|
|
}
|
|
/*
|
|
* If device has _EJ0, remove 'eject' file.
|
|
*/
|
|
if (acpi_has_method(dev->handle, "_EJ0"))
|
|
device_remove_file(&dev->dev, &dev_attr_eject);
|
|
|
|
if (acpi_has_method(dev->handle, "_SUN"))
|
|
device_remove_file(&dev->dev, &dev_attr_sun);
|
|
|
|
if (acpi_has_method(dev->handle, "_HRV"))
|
|
device_remove_file(&dev->dev, &dev_attr_hrv);
|
|
|
|
if (dev->pnp.unique_id)
|
|
device_remove_file(&dev->dev, &dev_attr_uid);
|
|
if (dev->pnp.type.bus_address)
|
|
device_remove_file(&dev->dev, &dev_attr_adr);
|
|
device_remove_file(&dev->dev, &dev_attr_modalias);
|
|
device_remove_file(&dev->dev, &dev_attr_hid);
|
|
if (acpi_has_method(dev->handle, "_STA"))
|
|
device_remove_file(&dev->dev, &dev_attr_status);
|
|
if (dev->handle)
|
|
device_remove_file(&dev->dev, &dev_attr_path);
|
|
}
|