cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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ipa_sysfs.c (3040B)

      1// SPDX-License-Identifier: GPL-2.0
      2
      3/* Copyright (C) 2021 Linaro Ltd. */
      4
      5#include <linux/kernel.h>
      6#include <linux/types.h>
      7#include <linux/device.h>
      8#include <linux/sysfs.h>
      9
     10#include "ipa.h"
     11#include "ipa_version.h"
     12#include "ipa_sysfs.h"
     13
     14static const char *ipa_version_string(struct ipa *ipa)
     15{
     16	switch (ipa->version) {
     17	case IPA_VERSION_3_0:
     18		return "3.0";
     19	case IPA_VERSION_3_1:
     20		return "3.1";
     21	case IPA_VERSION_3_5:
     22		return "3.5";
     23	case IPA_VERSION_3_5_1:
     24		return "3.5.1";
     25	case IPA_VERSION_4_0:
     26		return "4.0";
     27	case IPA_VERSION_4_1:
     28		return "4.1";
     29	case IPA_VERSION_4_2:
     30		return "4.2";
     31	case IPA_VERSION_4_5:
     32		return "4.5";
     33	case IPA_VERSION_4_7:
     34		return "4.7";
     35	case IPA_VERSION_4_9:
     36		return "4.9";
     37	case IPA_VERSION_4_11:
     38		return "4.11";
     39	default:
     40		return "0.0";	/* Won't happen (checked at probe time) */
     41	}
     42}
     43
     44static ssize_t
     45version_show(struct device *dev, struct device_attribute *attr, char *buf)
     46{
     47	struct ipa *ipa = dev_get_drvdata(dev);
     48
     49	return scnprintf(buf, PAGE_SIZE, "%s\n", ipa_version_string(ipa));
     50}
     51
     52static DEVICE_ATTR_RO(version);
     53
     54static struct attribute *ipa_attrs[] = {
     55	&dev_attr_version.attr,
     56	NULL
     57};
     58
     59const struct attribute_group ipa_attribute_group = {
     60	.attrs		= ipa_attrs,
     61};
     62
     63static const char *ipa_offload_string(struct ipa *ipa)
     64{
     65	return ipa->version < IPA_VERSION_4_5 ? "MAPv4" : "MAPv5";
     66}
     67
     68static ssize_t rx_offload_show(struct device *dev,
     69			       struct device_attribute *attr, char *buf)
     70{
     71	struct ipa *ipa = dev_get_drvdata(dev);
     72
     73	return scnprintf(buf, PAGE_SIZE, "%s\n", ipa_offload_string(ipa));
     74}
     75
     76static DEVICE_ATTR_RO(rx_offload);
     77
     78static ssize_t tx_offload_show(struct device *dev,
     79			       struct device_attribute *attr, char *buf)
     80{
     81	struct ipa *ipa = dev_get_drvdata(dev);
     82
     83	return scnprintf(buf, PAGE_SIZE, "%s\n", ipa_offload_string(ipa));
     84}
     85
     86static DEVICE_ATTR_RO(tx_offload);
     87
     88static struct attribute *ipa_feature_attrs[] = {
     89	&dev_attr_rx_offload.attr,
     90	&dev_attr_tx_offload.attr,
     91	NULL
     92};
     93
     94const struct attribute_group ipa_feature_attribute_group = {
     95	.name		= "feature",
     96	.attrs		= ipa_feature_attrs,
     97};
     98
     99static ssize_t
    100ipa_endpoint_id_show(struct ipa *ipa, char *buf, enum ipa_endpoint_name name)
    101{
    102	u32 endpoint_id = ipa->name_map[name]->endpoint_id;
    103
    104	return scnprintf(buf, PAGE_SIZE, "%u\n", endpoint_id);
    105}
    106
    107static ssize_t rx_endpoint_id_show(struct device *dev,
    108				   struct device_attribute *attr, char *buf)
    109{
    110	struct ipa *ipa = dev_get_drvdata(dev);
    111
    112	return ipa_endpoint_id_show(ipa, buf, IPA_ENDPOINT_AP_MODEM_RX);
    113}
    114
    115static DEVICE_ATTR_RO(rx_endpoint_id);
    116
    117static ssize_t tx_endpoint_id_show(struct device *dev,
    118				   struct device_attribute *attr, char *buf)
    119{
    120	struct ipa *ipa = dev_get_drvdata(dev);
    121
    122	return ipa_endpoint_id_show(ipa, buf, IPA_ENDPOINT_AP_MODEM_TX);
    123}
    124
    125static DEVICE_ATTR_RO(tx_endpoint_id);
    126
    127static struct attribute *ipa_modem_attrs[] = {
    128	&dev_attr_rx_endpoint_id.attr,
    129	&dev_attr_tx_endpoint_id.attr,
    130	NULL
    131};
    132
    133const struct attribute_group ipa_modem_attribute_group = {
    134	.name		= "modem",
    135	.attrs		= ipa_modem_attrs,
    136};