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
|
/*
* 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 "ap_bus.h"
#include "ap_asm.h"
/*
* AP card related attributes.
*/
static ssize_t ap_hwtype_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct ap_card *ac = to_ap_card(dev);
return snprintf(buf, PAGE_SIZE, "%d\n", ac->ap_dev.device_type);
}
static DEVICE_ATTR(hwtype, 0444, ap_hwtype_show, NULL);
static ssize_t ap_raw_hwtype_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct ap_card *ac = to_ap_card(dev);
return snprintf(buf, PAGE_SIZE, "%d\n", ac->raw_hwtype);
}
static DEVICE_ATTR(raw_hwtype, 0444, ap_raw_hwtype_show, NULL);
static ssize_t ap_depth_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct ap_card *ac = to_ap_card(dev);
return snprintf(buf, PAGE_SIZE, "%d\n", ac->queue_depth);
}
static DEVICE_ATTR(depth, 0444, ap_depth_show, NULL);
static ssize_t ap_functions_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct ap_card *ac = to_ap_card(dev);
return snprintf(buf, PAGE_SIZE, "0x%08X\n", ac->functions);
}
static DEVICE_ATTR(ap_functions, 0444, ap_functions_show, NULL);
static ssize_t ap_req_count_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct ap_card *ac = to_ap_card(dev);
unsigned int req_cnt;
req_cnt = 0;
spin_lock_bh(&ap_list_lock);
req_cnt = atomic_read(&ac->total_request_count);
spin_unlock_bh(&ap_list_lock);
return snprintf(buf, PAGE_SIZE, "%d\n", req_cnt);
}
static ssize_t ap_req_count_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct ap_card *ac = to_ap_card(dev);
struct ap_queue *aq;
spin_lock_bh(&ap_list_lock);
for_each_ap_queue(aq, ac)
aq->total_request_count = 0;
spin_unlock_bh(&ap_list_lock);
atomic_set(&ac->total_request_count, 0);
return count;
}
static DEVICE_ATTR(request_count, 0644, ap_req_count_show, ap_req_count_store);
static ssize_t ap_requestq_count_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct ap_card *ac = to_ap_card(dev);
struct ap_queue *aq;
unsigned int reqq_cnt;
reqq_cnt = 0;
spin_lock_bh(&ap_list_lock);
for_each_ap_queue(aq, ac)
reqq_cnt += aq->requestq_count;
spin_unlock_bh(&ap_list_lock);
return snprintf(buf, PAGE_SIZE, "%d\n", reqq_cnt);
}
static DEVICE_ATTR(requestq_count, 0444, ap_requestq_count_show, NULL);
static ssize_t ap_pendingq_count_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct ap_card *ac = to_ap_card(dev);
struct ap_queue *aq;
unsigned int penq_cnt;
penq_cnt = 0;
spin_lock_bh(&ap_list_lock);
for_each_ap_queue(aq, ac)
penq_cnt += aq->pendingq_count;
spin_unlock_bh(&ap_list_lock);
return snprintf(buf, PAGE_SIZE, "%d\n", penq_cnt);
}
static DEVICE_ATTR(pendingq_count, 0444, ap_pendingq_count_show, NULL);
static ssize_t ap_modalias_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
return sprintf(buf, "ap:t%02X\n", to_ap_dev(dev)->device_type);
}
static DEVICE_ATTR(modalias, 0444, ap_modalias_show, NULL);
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,
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);
if (!list_empty(&ac->list)) {
spin_lock_bh(&ap_list_lock);
list_del_init(&ac->list);
spin_unlock_bh(&ap_list_lock);
}
kfree(ac);
}
struct ap_card *ap_card_create(int id, int queue_depth, int device_type,
unsigned int functions)
{
struct ap_card *ac;
ac = kzalloc(sizeof(*ac), GFP_KERNEL);
if (!ac)
return NULL;
INIT_LIST_HEAD(&ac->queues);
ac->ap_dev.device.release = ap_card_device_release;
ac->ap_dev.device.type = &ap_card_type;
ac->ap_dev.device_type = device_type;
/* CEX6 toleration: map to CEX5 */
if (device_type == AP_DEVICE_TYPE_CEX6)
ac->ap_dev.device_type = AP_DEVICE_TYPE_CEX5;
ac->raw_hwtype = device_type;
ac->queue_depth = queue_depth;
ac->functions = functions;
ac->id = id;
return ac;
}
|
