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