drivers/net/ipa/ipa_sysfs.c

   1 // SPDX-License-Identifier: GPL-2.0
   2
   3 /* Copyright (C) 2021-2022 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
  14 static 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
  44 static ssize_t
  45 version_show(struct device *dev, struct device_attribute *attr, char *buf)
  46 {
  47         struct ipa *ipa = dev_get_drvdata(dev);
  48
  49         return sysfs_emit(buf, "%s\n", ipa_version_string(ipa));
  50 }
  51
  52 static DEVICE_ATTR_RO(version);
  53
  54 static struct attribute *ipa_attrs[] = {
  55         &dev_attr_version.attr,
  56         NULL
  57 };
  58
  59 const struct attribute_group ipa_attribute_group = {
  60         .attrs          = ipa_attrs,
  61 };
  62
  63 static const char *ipa_offload_string(struct ipa *ipa)
  64 {
  65         return ipa->version < IPA_VERSION_4_5 ? "MAPv4" : "MAPv5";
  66 }
  67
  68 static 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 sysfs_emit(buf, "%s\n", ipa_offload_string(ipa));
  74 }
  75
  76 static DEVICE_ATTR_RO(rx_offload);
  77
  78 static 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 sysfs_emit(buf, "%s\n", ipa_offload_string(ipa));
  84 }
  85
  86 static DEVICE_ATTR_RO(tx_offload);
  87
  88 static struct attribute *ipa_feature_attrs[] = {
  89         &dev_attr_rx_offload.attr,
  90         &dev_attr_tx_offload.attr,
  91         NULL
  92 };
  93
  94 const struct attribute_group ipa_feature_attribute_group = {
  95         .name           = "feature",
  96         .attrs          = ipa_feature_attrs,
  97 };
  98
  99 static umode_t ipa_endpoint_id_is_visible(struct kobject *kobj,
 100                                           struct attribute *attr, int n)
 101 {
 102         struct ipa *ipa = dev_get_drvdata(kobj_to_dev(kobj));
 103         struct device_attribute *dev_attr;
 104         struct dev_ext_attribute *ea;
 105         bool visible;
 106
 107         /* An endpoint id attribute is only visible if it's defined */
 108         dev_attr = container_of(attr, struct device_attribute, attr);
 109         ea = container_of(dev_attr, struct dev_ext_attribute, attr);
 110
 111         visible = !!ipa->name_map[(enum ipa_endpoint_name)(uintptr_t)ea->var];
 112
 113         return visible ? attr->mode : 0;
 114 }
 115
 116 static ssize_t endpoint_id_attr_show(struct device *dev,
 117                                      struct device_attribute *attr, char *buf)
 118 {
 119         struct ipa *ipa = dev_get_drvdata(dev);
 120         struct ipa_endpoint *endpoint;
 121         struct dev_ext_attribute *ea;
 122
 123         ea = container_of(attr, struct dev_ext_attribute, attr);
 124         endpoint = ipa->name_map[(enum ipa_endpoint_name)(uintptr_t)ea->var];
 125
 126         return sysfs_emit(buf, "%u\n", endpoint->endpoint_id);
 127 }
 128
 129 #define ENDPOINT_ID_ATTR(_n, _endpoint_name)                                \
 130         static struct dev_ext_attribute dev_attr_endpoint_id_ ## _n = {     \
 131                 .attr   = __ATTR(_n, 0444, endpoint_id_attr_show, NULL),    \
 132                 .var    = (void *)(_endpoint_name),                         \
 133         }
 134
 135 ENDPOINT_ID_ATTR(modem_rx, IPA_ENDPOINT_AP_MODEM_RX);
 136 ENDPOINT_ID_ATTR(modem_tx, IPA_ENDPOINT_AP_MODEM_TX);
 137
 138 static struct attribute *ipa_endpoint_id_attrs[] = {
 139         &dev_attr_endpoint_id_modem_rx.attr.attr,
 140         &dev_attr_endpoint_id_modem_tx.attr.attr,
 141         NULL
 142 };
 143
 144 const struct attribute_group ipa_endpoint_id_attribute_group = {
 145         .name           = "endpoint_id",
 146         .is_visible     = ipa_endpoint_id_is_visible,
 147         .attrs          = ipa_endpoint_id_attrs,
 148 };
 149
 150 /* Reuse endpoint ID attributes for the legacy modem endpoint IDs */
 151 #define MODEM_ATTR(_n, _endpoint_name)                                      \
 152         static struct dev_ext_attribute dev_attr_modem_ ## _n = {           \
 153                 .attr   = __ATTR(_n, 0444, endpoint_id_attr_show, NULL),    \
 154                 .var    = (void *)(_endpoint_name),                         \
 155         }
 156
 157 MODEM_ATTR(rx_endpoint_id, IPA_ENDPOINT_AP_MODEM_RX);
 158 MODEM_ATTR(tx_endpoint_id, IPA_ENDPOINT_AP_MODEM_TX);
 159
 160 static struct attribute *ipa_modem_attrs[] = {
 161         &dev_attr_modem_rx_endpoint_id.attr.attr,
 162         &dev_attr_modem_tx_endpoint_id.attr.attr,
 163         NULL,
 164 };
 165
 166 const struct attribute_group ipa_modem_attribute_group = {
 167         .name           = "modem",
 168         .attrs          = ipa_modem_attrs,
 169 };