1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
|
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright IBM Corp. 2016
* Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
*
* Adjunct processor bus, card related code.
*/
#define KMSG_COMPONENT "ap"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include <linux/init.h>
#include <linux/slab.h>
#include <asm/facility.h>
#include <asm/sclp.h>
#include "ap_bus.h"
/*
* AP card related attributes.
*/
static ssize_t hwtype_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct ap_card *ac = to_ap_card(dev);
return sysfs_emit(buf, "%d\n", ac->ap_dev.device_type);
}
static DEVICE_ATTR_RO(hwtype);
static ssize_t raw_hwtype_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct ap_card *ac = to_ap_card(dev);
return sysfs_emit(buf, "%d\n", ac->raw_hwtype);
}
static DEVICE_ATTR_RO(raw_hwtype);
static ssize_t depth_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct ap_card *ac = to_ap_card(dev);
return sysfs_emit(buf, "%d\n", ac->queue_depth);
}
static DEVICE_ATTR_RO(depth);
static ssize_t ap_functions_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct ap_card *ac = to_ap_card(dev);
return sysfs_emit(buf, "0x%08X\n", ac->functions);
}
static DEVICE_ATTR_RO(ap_functions);
static ssize_t request_count_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct ap_card *ac = to_ap_card(dev);
u64 req_cnt;
req_cnt = 0;
spin_lock_bh(&ap_queues_lock);
req_cnt = atomic64_read(&ac->total_request_count);
spin_unlock_bh(&ap_queues_lock);
return sysfs_emit(buf, "%llu\n", req_cnt);
}
static ssize_t request_count_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
int bkt;
struct ap_queue *aq;
struct ap_card *ac = to_ap_card(dev);
spin_lock_bh(&ap_queues_lock);
hash_for_each(ap_queues, bkt, aq, hnode)
if (ac == aq->card)
aq->total_request_count = 0;
spin_unlock_bh(&ap_queues_lock);
atomic64_set(&ac->total_request_count, 0);
return count;
}
static DEVICE_ATTR_RW(request_count);
static ssize_t requestq_count_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
int bkt;
struct ap_queue *aq;
unsigned int reqq_cnt;
struct ap_card *ac = to_ap_card(dev);
reqq_cnt = 0;
spin_lock_bh(&ap_queues_lock);
hash_for_each(ap_queues, bkt, aq, hnode)
if (ac == aq->card)
reqq_cnt += aq->requestq_count;
spin_unlock_bh(&ap_queues_lock);
return sysfs_emit(buf, "%d\n", reqq_cnt);
}
static DEVICE_ATTR_RO(requestq_count);
static ssize_t pendingq_count_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
int bkt;
struct ap_queue *aq;
unsigned int penq_cnt;
struct ap_card *ac = to_ap_card(dev);
penq_cnt = 0;
spin_lock_bh(&ap_queues_lock);
hash_for_each(ap_queues, bkt, aq, hnode)
if (ac == aq->card)
penq_cnt += aq->pendingq_count;
spin_unlock_bh(&ap_queues_lock);
return sysfs_emit(buf, "%d\n", penq_cnt);
}
static DEVICE_ATTR_RO(pendingq_count);
static ssize_t modalias_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
return sysfs_emit(buf, "ap:t%02X\n", to_ap_dev(dev)->device_type);
}
static DEVICE_ATTR_RO(modalias);
static ssize_t config_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct ap_card *ac = to_ap_card(dev);
return sysfs_emit(buf, "%d\n", ac->config ? 1 : 0);
}
static ssize_t config_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
int rc = 0, cfg;
struct ap_card *ac = to_ap_card(dev);
if (sscanf(buf, "%d\n", &cfg) != 1 || cfg < 0 || cfg > 1)
return -EINVAL;
if (cfg && !ac->config)
rc = sclp_ap_configure(ac->id);
else if (!cfg && ac->config)
rc = sclp_ap_deconfigure(ac->id);
if (rc)
return rc;
ac->config = cfg ? true : false;
ap_send_config_uevent(&ac->ap_dev, ac->config);
return count;
}
static DEVICE_ATTR_RW(config);
static ssize_t chkstop_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct ap_card *ac = to_ap_card(dev);
return sysfs_emit(buf, "%d\n", ac->chkstop ? 1 : 0);
}
static DEVICE_ATTR_RO(chkstop);
static ssize_t max_msg_size_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct ap_card *ac = to_ap_card(dev);
return sysfs_emit(buf, "%u\n", ac->maxmsgsize);
}
static DEVICE_ATTR_RO(max_msg_size);
static struct attribute *ap_card_dev_attrs[] = {
&dev_attr_hwtype.attr,
&dev_attr_raw_hwtype.attr,
&dev_attr_depth.attr,
&dev_attr_ap_functions.attr,
&dev_attr_request_count.attr,
&dev_attr_requestq_count.attr,
&dev_attr_pendingq_count.attr,
&dev_attr_modalias.attr,
&dev_attr_config.attr,
&dev_attr_chkstop.attr,
&dev_attr_max_msg_size.attr,
NULL
};
static struct attribute_group ap_card_dev_attr_group = {
.attrs = ap_card_dev_attrs
};
static const struct attribute_group *ap_card_dev_attr_groups[] = {
&ap_card_dev_attr_group,
NULL
};
static struct device_type ap_card_type = {
.name = "ap_card",
.groups = ap_card_dev_attr_groups,
};
static void ap_card_device_release(struct device *dev)
{
struct ap_card *ac = to_ap_card(dev);
kfree(ac);
}
struct ap_card *ap_card_create(int id, int queue_depth, int raw_type,
int comp_type, unsigned int functions, int ml)
{
struct ap_card *ac;
ac = kzalloc(sizeof(*ac), GFP_KERNEL);
if (!ac)
return NULL;
ac->ap_dev.device.release = ap_card_device_release;
ac->ap_dev.device.type = &ap_card_type;
ac->ap_dev.device_type = comp_type;
ac->raw_hwtype = raw_type;
ac->queue_depth = queue_depth;
ac->functions = functions;
ac->id = id;
ac->maxmsgsize = ml > 0 ?
ml * AP_TAPQ_ML_FIELD_CHUNK_SIZE : AP_DEFAULT_MAX_MSG_SIZE;
return ac;
}
|
