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-rw-r--r--Documentation/ABI/testing/sysfs-devices-platform-soc-ipa62
-rw-r--r--drivers/net/ipa/ipa_main.c1
-rw-r--r--drivers/net/ipa/ipa_sysfs.c69
-rw-r--r--drivers/net/ipa/ipa_sysfs.h1
4 files changed, 102 insertions, 31 deletions
diff --git a/Documentation/ABI/testing/sysfs-devices-platform-soc-ipa b/Documentation/ABI/testing/sysfs-devices-platform-soc-ipa
index c56dcf15bf29..364b1ba41242 100644
--- a/Documentation/ABI/testing/sysfs-devices-platform-soc-ipa
+++ b/Documentation/ABI/testing/sysfs-devices-platform-soc-ipa
@@ -46,33 +46,69 @@ Description:
that is supported by the hardware. The possible values
are "MAPv4" or "MAPv5".
+What: .../XXXXXXX.ipa/endpoint_id/
+Date: July 2022
+KernelVersion: v5.19
+Contact: Alex Elder <elder@kernel.org>
+Description:
+ The .../XXXXXXX.ipa/endpoint_id/ directory contains
+ attributes that define IDs associated with IPA
+ endpoints. The "rx" or "tx" in an endpoint name is
+ from the perspective of the AP. An endpoint ID is a
+ small unsigned integer.
+
+What: .../XXXXXXX.ipa/endpoint_id/modem_rx
+Date: July 2022
+KernelVersion: v5.19
+Contact: Alex Elder <elder@kernel.org>
+Description:
+ The .../XXXXXXX.ipa/endpoint_id/modem_rx file contains
+ the ID of the AP endpoint on which packets originating
+ from the embedded modem are received.
+
+What: .../XXXXXXX.ipa/endpoint_id/modem_tx
+Date: July 2022
+KernelVersion: v5.19
+Contact: Alex Elder <elder@kernel.org>
+Description:
+ The .../XXXXXXX.ipa/endpoint_id/modem_tx file contains
+ the ID of the AP endpoint on which packets destined
+ for the embedded modem are sent.
+
+What: .../XXXXXXX.ipa/endpoint_id/monitor_rx
+Date: July 2022
+KernelVersion: v5.19
+Contact: Alex Elder <elder@kernel.org>
+Description:
+ The .../XXXXXXX.ipa/endpoint_id/monitor_rx file contains
+ the ID of the AP endpoint on which IPA "monitor" data is
+ received. The monitor endpoint supplies replicas of
+ packets that enter the IPA hardware for processing.
+ Each replicated packet is preceded by a fixed-size "ODL"
+ header (see .../XXXXXXX.ipa/feature/monitor, above).
+ Large packets are truncated, to reduce the bandwidth
+ required to provide the monitor function.
+
What: .../XXXXXXX.ipa/modem/
Date: June 2021
KernelVersion: v5.14
Contact: Alex Elder <elder@kernel.org>
Description:
- The .../XXXXXXX.ipa/modem/ directory contains a set of
- attributes describing properties of the modem execution
- environment reachable by the IPA hardware.
+ The .../XXXXXXX.ipa/modem/ directory contains attributes
+ describing properties of the modem embedded in the SoC.
What: .../XXXXXXX.ipa/modem/rx_endpoint_id
Date: June 2021
KernelVersion: v5.14
Contact: Alex Elder <elder@kernel.org>
Description:
- The .../XXXXXXX.ipa/feature/rx_endpoint_id file contains
- the AP endpoint ID that receives packets originating from
- the modem execution environment. The "rx" is from the
- perspective of the AP; this endpoint is considered an "IPA
- producer". An endpoint ID is a small unsigned integer.
+ The .../XXXXXXX.ipa/modem/rx_endpoint_id file duplicates
+ the value found in .../XXXXXXX.ipa/endpoint_id/modem_rx.
What: .../XXXXXXX.ipa/modem/tx_endpoint_id
Date: June 2021
KernelVersion: v5.14
Contact: Alex Elder <elder@kernel.org>
Description:
- The .../XXXXXXX.ipa/feature/tx_endpoint_id file contains
- the AP endpoint ID used to transmit packets destined for
- the modem execution environment. The "tx" is from the
- perspective of the AP; this endpoint is considered an "IPA
- consumer". An endpoint ID is a small unsigned integer.
+ The .../XXXXXXX.ipa/modem/tx_endpoint_id file duplicates
+ the value found in .../XXXXXXX.ipa/endpoint_id/modem_tx.
diff --git a/drivers/net/ipa/ipa_main.c b/drivers/net/ipa/ipa_main.c
index 3757ce3de2c5..b989259b0204 100644
--- a/drivers/net/ipa/ipa_main.c
+++ b/drivers/net/ipa/ipa_main.c
@@ -851,6 +851,7 @@ static void ipa_shutdown(struct platform_device *pdev)
static const struct attribute_group *ipa_attribute_groups[] = {
&ipa_attribute_group,
&ipa_feature_attribute_group,
+ &ipa_endpoint_id_attribute_group,
&ipa_modem_attribute_group,
NULL,
};
diff --git a/drivers/net/ipa/ipa_sysfs.c b/drivers/net/ipa/ipa_sysfs.c
index ff61dbdd70d8..c0c8641cdd14 100644
--- a/drivers/net/ipa/ipa_sysfs.c
+++ b/drivers/net/ipa/ipa_sysfs.c
@@ -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 = {
diff --git a/drivers/net/ipa/ipa_sysfs.h b/drivers/net/ipa/ipa_sysfs.h
index b34e5650bf8c..4a3ffd1e4e3f 100644
--- a/drivers/net/ipa/ipa_sysfs.h
+++ b/drivers/net/ipa/ipa_sysfs.h
@@ -10,6 +10,7 @@ struct attribute_group;
extern const struct attribute_group ipa_attribute_group;
extern const struct attribute_group ipa_feature_attribute_group;
+extern const struct attribute_group ipa_endpoint_id_attribute_group;
extern const struct attribute_group ipa_modem_attribute_group;
#endif /* _IPA_SYSFS_H_ */
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-04 13:39:52 +0000