1 // SPDX-License-Identifier: GPL-2.0
2
3 /* Copyright (C) 2021-2024 Linaro Ltd. */
4
5 #include <linux/device.h>
6 #include <linux/sysfs.h>
7 #include <linux/types.h>
8
9 #include "ipa.h"
10 #include "ipa_sysfs.h"
11 #include "ipa_version.h"
12
ipa_version_string(struct ipa * ipa)13 static const char *ipa_version_string(struct ipa *ipa)
14 {
15 switch (ipa->version) {
16 case IPA_VERSION_3_0:
17 return "3.0";
18 case IPA_VERSION_3_1:
19 return "3.1";
20 case IPA_VERSION_3_5:
21 return "3.5";
22 case IPA_VERSION_3_5_1:
23 return "3.5.1";
24 case IPA_VERSION_4_0:
25 return "4.0";
26 case IPA_VERSION_4_1:
27 return "4.1";
28 case IPA_VERSION_4_2:
29 return "4.2";
30 case IPA_VERSION_4_5:
31 return "4.5";
32 case IPA_VERSION_4_7:
33 return "4.7";
34 case IPA_VERSION_4_9:
35 return "4.9";
36 case IPA_VERSION_4_11:
37 return "4.11";
38 case IPA_VERSION_5_0:
39 return "5.0";
40 default:
41 return "0.0"; /* Won't happen (checked at probe time) */
42 }
43 }
44
45 static ssize_t
version_show(struct device * dev,struct device_attribute * attr,char * buf)46 version_show(struct device *dev, struct device_attribute *attr, char *buf)
47 {
48 struct ipa *ipa = dev_get_drvdata(dev);
49
50 return sysfs_emit(buf, "%s\n", ipa_version_string(ipa));
51 }
52
53 static DEVICE_ATTR_RO(version);
54
55 static struct attribute *ipa_attrs[] = {
56 &dev_attr_version.attr,
57 NULL
58 };
59
60 const struct attribute_group ipa_attribute_group = {
61 .attrs = ipa_attrs,
62 };
63
ipa_offload_string(struct ipa * ipa)64 static const char *ipa_offload_string(struct ipa *ipa)
65 {
66 return ipa->version < IPA_VERSION_4_5 ? "MAPv4" : "MAPv5";
67 }
68
rx_offload_show(struct device * dev,struct device_attribute * attr,char * buf)69 static ssize_t rx_offload_show(struct device *dev,
70 struct device_attribute *attr, char *buf)
71 {
72 struct ipa *ipa = dev_get_drvdata(dev);
73
74 return sysfs_emit(buf, "%s\n", ipa_offload_string(ipa));
75 }
76
77 static DEVICE_ATTR_RO(rx_offload);
78
tx_offload_show(struct device * dev,struct device_attribute * attr,char * buf)79 static ssize_t tx_offload_show(struct device *dev,
80 struct device_attribute *attr, char *buf)
81 {
82 struct ipa *ipa = dev_get_drvdata(dev);
83
84 return sysfs_emit(buf, "%s\n", ipa_offload_string(ipa));
85 }
86
87 static DEVICE_ATTR_RO(tx_offload);
88
89 static struct attribute *ipa_feature_attrs[] = {
90 &dev_attr_rx_offload.attr,
91 &dev_attr_tx_offload.attr,
92 NULL
93 };
94
95 const struct attribute_group ipa_feature_attribute_group = {
96 .name = "feature",
97 .attrs = ipa_feature_attrs,
98 };
99
ipa_endpoint_id_is_visible(struct kobject * kobj,struct attribute * attr,int n)100 static umode_t ipa_endpoint_id_is_visible(struct kobject *kobj,
101 struct attribute *attr, int n)
102 {
103 struct ipa *ipa = dev_get_drvdata(kobj_to_dev(kobj));
104 struct device_attribute *dev_attr;
105 struct dev_ext_attribute *ea;
106 bool visible;
107
108 /* An endpoint id attribute is only visible if it's defined */
109 dev_attr = container_of(attr, struct device_attribute, attr);
110 ea = container_of(dev_attr, struct dev_ext_attribute, attr);
111
112 visible = !!ipa->name_map[(enum ipa_endpoint_name)(uintptr_t)ea->var];
113
114 return visible ? attr->mode : 0;
115 }
116
endpoint_id_attr_show(struct device * dev,struct device_attribute * attr,char * buf)117 static ssize_t endpoint_id_attr_show(struct device *dev,
118 struct device_attribute *attr, char *buf)
119 {
120 struct ipa *ipa = dev_get_drvdata(dev);
121 struct ipa_endpoint *endpoint;
122 struct dev_ext_attribute *ea;
123
124 ea = container_of(attr, struct dev_ext_attribute, attr);
125 endpoint = ipa->name_map[(enum ipa_endpoint_name)(uintptr_t)ea->var];
126
127 return sysfs_emit(buf, "%u\n", endpoint->endpoint_id);
128 }
129
130 #define ENDPOINT_ID_ATTR(_n, _endpoint_name) \
131 static struct dev_ext_attribute dev_attr_endpoint_id_ ## _n = { \
132 .attr = __ATTR(_n, 0444, endpoint_id_attr_show, NULL), \
133 .var = (void *)(_endpoint_name), \
134 }
135
136 ENDPOINT_ID_ATTR(modem_rx, IPA_ENDPOINT_AP_MODEM_RX);
137 ENDPOINT_ID_ATTR(modem_tx, IPA_ENDPOINT_AP_MODEM_TX);
138
139 static struct attribute *ipa_endpoint_id_attrs[] = {
140 &dev_attr_endpoint_id_modem_rx.attr.attr,
141 &dev_attr_endpoint_id_modem_tx.attr.attr,
142 NULL
143 };
144
145 const struct attribute_group ipa_endpoint_id_attribute_group = {
146 .name = "endpoint_id",
147 .is_visible = ipa_endpoint_id_is_visible,
148 .attrs = ipa_endpoint_id_attrs,
149 };
150
151 /* Reuse endpoint ID attributes for the legacy modem endpoint IDs */
152 #define MODEM_ATTR(_n, _endpoint_name) \
153 static struct dev_ext_attribute dev_attr_modem_ ## _n = { \
154 .attr = __ATTR(_n, 0444, endpoint_id_attr_show, NULL), \
155 .var = (void *)(_endpoint_name), \
156 }
157
158 MODEM_ATTR(rx_endpoint_id, IPA_ENDPOINT_AP_MODEM_RX);
159 MODEM_ATTR(tx_endpoint_id, IPA_ENDPOINT_AP_MODEM_TX);
160
161 static struct attribute *ipa_modem_attrs[] = {
162 &dev_attr_modem_rx_endpoint_id.attr.attr,
163 &dev_attr_modem_tx_endpoint_id.attr.attr,
164 NULL,
165 };
166
167 const struct attribute_group ipa_modem_attribute_group = {
168 .name = "modem",
169 .attrs = ipa_modem_attrs,
170 };
171