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// SPDX-License-Identifier: GPL-2.0
/* Copyright (C) 2021-2022 Linaro Ltd. */
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/device.h>
#include <linux/sysfs.h>
#include "ipa.h"
#include "ipa_version.h"
#include "ipa_sysfs.h"
static const char *ipa_version_string(struct ipa *ipa)
{
switch (ipa->version) {
case IPA_VERSION_3_0:
return "3.0";
case IPA_VERSION_3_1:
return "3.1";
case IPA_VERSION_3_5:
return "3.5";
case IPA_VERSION_3_5_1:
return "3.5.1";
case IPA_VERSION_4_0:
return "4.0";
case IPA_VERSION_4_1:
return "4.1";
case IPA_VERSION_4_2:
return "4.2";
case IPA_VERSION_4_5:
return "4.5";
case IPA_VERSION_4_7:
return "4.7";
case IPA_VERSION_4_9:
return "4.9";
case IPA_VERSION_4_11:
return "4.11";
case IPA_VERSION_5_0:
return "5.0";
default:
return "0.0"; /* Won't happen (checked at probe time) */
}
}
static ssize_t
version_show(struct device *dev, struct device_attribute *attr, char *buf)
{
struct ipa *ipa = dev_get_drvdata(dev);
return sysfs_emit(buf, "%s\n", ipa_version_string(ipa));
}
static DEVICE_ATTR_RO(version);
static struct attribute *ipa_attrs[] = {
&dev_attr_version.attr,
NULL
};
const struct attribute_group ipa_attribute_group = {
.attrs = ipa_attrs,
};
static const char *ipa_offload_string(struct ipa *ipa)
{
return ipa->version < IPA_VERSION_4_5 ? "MAPv4" : "MAPv5";
}
static ssize_t rx_offload_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct ipa *ipa = dev_get_drvdata(dev);
return sysfs_emit(buf, "%s\n", ipa_offload_string(ipa));
}
static DEVICE_ATTR_RO(rx_offload);
static ssize_t tx_offload_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct ipa *ipa = dev_get_drvdata(dev);
return sysfs_emit(buf, "%s\n", ipa_offload_string(ipa));
}
static DEVICE_ATTR_RO(tx_offload);
static struct attribute *ipa_feature_attrs[] = {
&dev_attr_rx_offload.attr,
&dev_attr_tx_offload.attr,
NULL
};
const struct attribute_group ipa_feature_attribute_group = {
.name = "feature",
.attrs = ipa_feature_attrs,
};
static umode_t ipa_endpoint_id_is_visible(struct kobject *kobj,
struct attribute *attr, int n)
{
struct ipa *ipa = dev_get_drvdata(kobj_to_dev(kobj));
struct device_attribute *dev_attr;
struct dev_ext_attribute *ea;
bool visible;
/* An endpoint id attribute is only visible if it's defined */
dev_attr = container_of(attr, struct device_attribute, attr);
ea = container_of(dev_attr, struct dev_ext_attribute, attr);
visible = !!ipa->name_map[(enum ipa_endpoint_name)(uintptr_t)ea->var];
return visible ? attr->mode : 0;
}
static ssize_t endpoint_id_attr_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct ipa *ipa = dev_get_drvdata(dev);
struct ipa_endpoint *endpoint;
struct dev_ext_attribute *ea;
ea = container_of(attr, struct dev_ext_attribute, attr);
endpoint = ipa->name_map[(enum ipa_endpoint_name)(uintptr_t)ea->var];
return sysfs_emit(buf, "%u\n", endpoint->endpoint_id);
}
#define ENDPOINT_ID_ATTR(_n, _endpoint_name) \
static struct dev_ext_attribute dev_attr_endpoint_id_ ## _n = { \
.attr = __ATTR(_n, 0444, endpoint_id_attr_show, NULL), \
.var = (void *)(_endpoint_name), \
}
ENDPOINT_ID_ATTR(modem_rx, IPA_ENDPOINT_AP_MODEM_RX);
ENDPOINT_ID_ATTR(modem_tx, IPA_ENDPOINT_AP_MODEM_TX);
static struct attribute *ipa_endpoint_id_attrs[] = {
&dev_attr_endpoint_id_modem_rx.attr.attr,
&dev_attr_endpoint_id_modem_tx.attr.attr,
NULL
};
const struct attribute_group ipa_endpoint_id_attribute_group = {
.name = "endpoint_id",
.is_visible = ipa_endpoint_id_is_visible,
.attrs = ipa_endpoint_id_attrs,
};
/* Reuse endpoint ID attributes for the legacy modem endpoint IDs */
#define MODEM_ATTR(_n, _endpoint_name) \
static struct dev_ext_attribute dev_attr_modem_ ## _n = { \
.attr = __ATTR(_n, 0444, endpoint_id_attr_show, NULL), \
.var = (void *)(_endpoint_name), \
}
MODEM_ATTR(rx_endpoint_id, IPA_ENDPOINT_AP_MODEM_RX);
MODEM_ATTR(tx_endpoint_id, IPA_ENDPOINT_AP_MODEM_TX);
static struct attribute *ipa_modem_attrs[] = {
&dev_attr_modem_rx_endpoint_id.attr.attr,
&dev_attr_modem_tx_endpoint_id.attr.attr,
NULL,
};
const struct attribute_group ipa_modem_attribute_group = {
.name = "modem",
.attrs = ipa_modem_attrs,
};
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