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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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2e3cf97f47
Add IPA device attributes to expose information known by the IPA driver about the hardware and its configuration. All pointers used to display these attribute values (i.e., IPA pointer and endpoint pointers) will have been initialized by the time IPA probe has completed, so they may be safely dereferenced. Signed-off-by: Alex Elder <elder@linaro.org> Signed-off-by: David S. Miller <davem@davemloft.net>
136 lines
3 KiB
C
136 lines
3 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright (C) 2021 Linaro Ltd. */
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/device.h>
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#include <linux/sysfs.h>
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#include "ipa.h"
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#include "ipa_version.h"
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#include "ipa_sysfs.h"
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static const char *ipa_version_string(struct ipa *ipa)
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{
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switch (ipa->version) {
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case IPA_VERSION_3_0:
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return "3.0";
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case IPA_VERSION_3_1:
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return "3.1";
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case IPA_VERSION_3_5:
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return "3.5";
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case IPA_VERSION_3_5_1:
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return "3.5.1";
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case IPA_VERSION_4_0:
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return "4.0";
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case IPA_VERSION_4_1:
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return "4.1";
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case IPA_VERSION_4_2:
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return "4.2";
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case IPA_VERSION_4_5:
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return "4.5";
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case IPA_VERSION_4_7:
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return "4.7";
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case IPA_VERSION_4_9:
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return "4.9";
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case IPA_VERSION_4_11:
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return "4.11";
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default:
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return "0.0"; /* Won't happen (checked at probe time) */
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}
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}
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static ssize_t
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version_show(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct ipa *ipa = dev_get_drvdata(dev);
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return scnprintf(buf, PAGE_SIZE, "%s\n", ipa_version_string(ipa));
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}
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static DEVICE_ATTR_RO(version);
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static struct attribute *ipa_attrs[] = {
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&dev_attr_version.attr,
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NULL
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};
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const struct attribute_group ipa_attribute_group = {
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.attrs = ipa_attrs,
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};
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static const char *ipa_offload_string(struct ipa *ipa)
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{
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return ipa->version < IPA_VERSION_4_5 ? "MAPv4" : "MAPv5";
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}
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static ssize_t rx_offload_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct ipa *ipa = dev_get_drvdata(dev);
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return scnprintf(buf, PAGE_SIZE, "%s\n", ipa_offload_string(ipa));
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}
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static DEVICE_ATTR_RO(rx_offload);
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static ssize_t tx_offload_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct ipa *ipa = dev_get_drvdata(dev);
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return scnprintf(buf, PAGE_SIZE, "%s\n", ipa_offload_string(ipa));
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}
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static DEVICE_ATTR_RO(tx_offload);
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static struct attribute *ipa_feature_attrs[] = {
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&dev_attr_rx_offload.attr,
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&dev_attr_tx_offload.attr,
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NULL
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};
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const struct attribute_group ipa_feature_attribute_group = {
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.name = "feature",
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.attrs = ipa_feature_attrs,
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};
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static ssize_t
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ipa_endpoint_id_show(struct ipa *ipa, char *buf, enum ipa_endpoint_name name)
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{
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u32 endpoint_id = ipa->name_map[name]->endpoint_id;
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return scnprintf(buf, PAGE_SIZE, "%u\n", endpoint_id);
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}
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static ssize_t rx_endpoint_id_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct ipa *ipa = dev_get_drvdata(dev);
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return ipa_endpoint_id_show(ipa, buf, IPA_ENDPOINT_AP_MODEM_RX);
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}
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static DEVICE_ATTR_RO(rx_endpoint_id);
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static ssize_t tx_endpoint_id_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct ipa *ipa = dev_get_drvdata(dev);
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return ipa_endpoint_id_show(ipa, buf, IPA_ENDPOINT_AP_MODEM_TX);
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}
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static DEVICE_ATTR_RO(tx_endpoint_id);
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static struct attribute *ipa_modem_attrs[] = {
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&dev_attr_rx_endpoint_id.attr,
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&dev_attr_tx_endpoint_id.attr,
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NULL
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};
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const struct attribute_group ipa_modem_attribute_group = {
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.name = "modem",
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.attrs = ipa_modem_attrs,
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};
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