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path: root/drivers/net/ipa/ipa_sysfs.c
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Diffstat (limited to 'drivers/net/ipa/ipa_sysfs.c')
-rw-r--r--drivers/net/ipa/ipa_sysfs.c71
1 files changed, 52 insertions, 19 deletions
diff --git a/drivers/net/ipa/ipa_sysfs.c b/drivers/net/ipa/ipa_sysfs.c
index ff61dbdd70d8..5cbc15a971f9 100644
--- a/drivers/net/ipa/ipa_sysfs.c
+++ b/drivers/net/ipa/ipa_sysfs.c
@@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0
-/* Copyright (C) 2021 Linaro Ltd. */
+/* Copyright (C) 2021-2022 Linaro Ltd. */
#include <linux/kernel.h>
#include <linux/types.h>
@@ -96,38 +96,71 @@ const struct attribute_group ipa_feature_attribute_group = {
.attrs = ipa_feature_attrs,
};
-static ssize_t
-ipa_endpoint_id_show(struct ipa *ipa, char *buf, enum ipa_endpoint_name name)
+static umode_t ipa_endpoint_id_is_visible(struct kobject *kobj,
+ struct attribute *attr, int n)
{
- u32 endpoint_id = ipa->name_map[name]->endpoint_id;
+ 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);
- return scnprintf(buf, PAGE_SIZE, "%u\n", endpoint_id);
+ visible = !!ipa->name_map[(enum ipa_endpoint_name)(uintptr_t)ea->var];
+
+ return visible ? attr->mode : 0;
}
-static ssize_t rx_endpoint_id_show(struct device *dev,
- struct device_attribute *attr, char *buf)
+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 ipa_endpoint_id_show(ipa, buf, IPA_ENDPOINT_AP_MODEM_RX);
+ return sysfs_emit(buf, "%u\n", endpoint->endpoint_id);
}
-static DEVICE_ATTR_RO(rx_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), \
+ }
-static ssize_t tx_endpoint_id_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct ipa *ipa = dev_get_drvdata(dev);
+ENDPOINT_ID_ATTR(modem_rx, IPA_ENDPOINT_AP_MODEM_RX);
+ENDPOINT_ID_ATTR(modem_tx, IPA_ENDPOINT_AP_MODEM_TX);
- return ipa_endpoint_id_show(ipa, buf, 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
+};
-static DEVICE_ATTR_RO(tx_endpoint_id);
+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_rx_endpoint_id.attr,
- &dev_attr_tx_endpoint_id.attr,
- NULL
+ &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 = {