bus.c (7d0bc6360f17ea323ab25939a34857123d7d87e5) bus.c (22779149e93d956e9d266f545b26e548bf5b132d)
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (C) 2021 ARM Ltd.
4 */
5
6#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
7
8#include <linux/arm_ffa.h>
9#include <linux/device.h>
10#include <linux/fs.h>
11#include <linux/kernel.h>
12#include <linux/module.h>
13#include <linux/slab.h>
14#include <linux/types.h>
15
16#include "common.h"
17
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (C) 2021 ARM Ltd.
4 */
5
6#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
7
8#include <linux/arm_ffa.h>
9#include <linux/device.h>
10#include <linux/fs.h>
11#include <linux/kernel.h>
12#include <linux/module.h>
13#include <linux/slab.h>
14#include <linux/types.h>
15
16#include "common.h"
17
18#define SCMI_UEVENT_MODALIAS_FMT "arm_ffa:%04x:%pUb"
19
18static DEFINE_IDA(ffa_bus_id);
19
20static int ffa_device_match(struct device *dev, struct device_driver *drv)
21{
22 const struct ffa_device_id *id_table;
23 struct ffa_device *ffa_dev;
24
25 id_table = to_ffa_driver(drv)->id_table;

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58 if (ffa_drv->remove)
59 ffa_drv->remove(to_ffa_dev(dev));
60}
61
62static int ffa_device_uevent(const struct device *dev, struct kobj_uevent_env *env)
63{
64 const struct ffa_device *ffa_dev = to_ffa_dev(dev);
65
20static DEFINE_IDA(ffa_bus_id);
21
22static int ffa_device_match(struct device *dev, struct device_driver *drv)
23{
24 const struct ffa_device_id *id_table;
25 struct ffa_device *ffa_dev;
26
27 id_table = to_ffa_driver(drv)->id_table;

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60 if (ffa_drv->remove)
61 ffa_drv->remove(to_ffa_dev(dev));
62}
63
64static int ffa_device_uevent(const struct device *dev, struct kobj_uevent_env *env)
65{
66 const struct ffa_device *ffa_dev = to_ffa_dev(dev);
67
66 return add_uevent_var(env, "MODALIAS=arm_ffa:%04x:%pUb",
68 return add_uevent_var(env, "MODALIAS=" SCMI_UEVENT_MODALIAS_FMT,
67 ffa_dev->vm_id, &ffa_dev->uuid);
68}
69
69 ffa_dev->vm_id, &ffa_dev->uuid);
70}
71
72static ssize_t modalias_show(struct device *dev,
73 struct device_attribute *attr, char *buf)
74{
75 struct ffa_device *ffa_dev = to_ffa_dev(dev);
76
77 return sysfs_emit(buf, SCMI_UEVENT_MODALIAS_FMT, ffa_dev->vm_id,
78 &ffa_dev->uuid);
79}
80static DEVICE_ATTR_RO(modalias);
81
70static ssize_t partition_id_show(struct device *dev,
71 struct device_attribute *attr, char *buf)
72{
73 struct ffa_device *ffa_dev = to_ffa_dev(dev);
74
75 return sprintf(buf, "0x%04x\n", ffa_dev->vm_id);
76}
77static DEVICE_ATTR_RO(partition_id);

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83
84 return sprintf(buf, "%pUb\n", &ffa_dev->uuid);
85}
86static DEVICE_ATTR_RO(uuid);
87
88static struct attribute *ffa_device_attributes_attrs[] = {
89 &dev_attr_partition_id.attr,
90 &dev_attr_uuid.attr,
82static ssize_t partition_id_show(struct device *dev,
83 struct device_attribute *attr, char *buf)
84{
85 struct ffa_device *ffa_dev = to_ffa_dev(dev);
86
87 return sprintf(buf, "0x%04x\n", ffa_dev->vm_id);
88}
89static DEVICE_ATTR_RO(partition_id);

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95
96 return sprintf(buf, "%pUb\n", &ffa_dev->uuid);
97}
98static DEVICE_ATTR_RO(uuid);
99
100static struct attribute *ffa_device_attributes_attrs[] = {
101 &dev_attr_partition_id.attr,
102 &dev_attr_uuid.attr,
103 &dev_attr_modalias.attr,
91 NULL,
92};
93ATTRIBUTE_GROUPS(ffa_device_attributes);
94
95struct bus_type ffa_bus_type = {
96 .name = "arm_ffa",
97 .match = ffa_device_match,
98 .probe = ffa_device_probe,

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105};
106ATTRIBUTE_GROUPS(ffa_device_attributes);
107
108struct bus_type ffa_bus_type = {
109 .name = "arm_ffa",
110 .match = ffa_device_match,
111 .probe = ffa_device_probe,

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