2 * Copyright IBM Corp. 2016
3 * Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
5 * Adjunct processor bus, card related code.
8 #define KMSG_COMPONENT "ap"
9 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
11 #include <linux/init.h>
12 #include <linux/slab.h>
13 #include <asm/facility.h>
19 * AP card related attributes.
21 static ssize_t ap_hwtype_show(struct device *dev,
22 struct device_attribute *attr, char *buf)
24 struct ap_card *ac = to_ap_card(dev);
26 return snprintf(buf, PAGE_SIZE, "%d\n", ac->ap_dev.device_type);
29 static DEVICE_ATTR(hwtype, 0444, ap_hwtype_show, NULL);
31 static ssize_t ap_raw_hwtype_show(struct device *dev,
32 struct device_attribute *attr, char *buf)
34 struct ap_card *ac = to_ap_card(dev);
36 return snprintf(buf, PAGE_SIZE, "%d\n", ac->raw_hwtype);
39 static DEVICE_ATTR(raw_hwtype, 0444, ap_raw_hwtype_show, NULL);
41 static ssize_t ap_depth_show(struct device *dev, struct device_attribute *attr,
44 struct ap_card *ac = to_ap_card(dev);
46 return snprintf(buf, PAGE_SIZE, "%d\n", ac->queue_depth);
49 static DEVICE_ATTR(depth, 0444, ap_depth_show, NULL);
51 static ssize_t ap_functions_show(struct device *dev,
52 struct device_attribute *attr, char *buf)
54 struct ap_card *ac = to_ap_card(dev);
56 return snprintf(buf, PAGE_SIZE, "0x%08X\n", ac->functions);
59 static DEVICE_ATTR(ap_functions, 0444, ap_functions_show, NULL);
61 static ssize_t ap_req_count_show(struct device *dev,
62 struct device_attribute *attr,
65 struct ap_card *ac = to_ap_card(dev);
69 spin_lock_bh(&ap_list_lock);
70 req_cnt = atomic_read(&ac->total_request_count);
71 spin_unlock_bh(&ap_list_lock);
72 return snprintf(buf, PAGE_SIZE, "%d\n", req_cnt);
75 static ssize_t ap_req_count_store(struct device *dev,
76 struct device_attribute *attr,
77 const char *buf, size_t count)
79 struct ap_card *ac = to_ap_card(dev);
82 spin_lock_bh(&ap_list_lock);
83 for_each_ap_queue(aq, ac)
84 aq->total_request_count = 0;
85 spin_unlock_bh(&ap_list_lock);
86 atomic_set(&ac->total_request_count, 0);
91 static DEVICE_ATTR(request_count, 0644, ap_req_count_show, ap_req_count_store);
93 static ssize_t ap_requestq_count_show(struct device *dev,
94 struct device_attribute *attr, char *buf)
96 struct ap_card *ac = to_ap_card(dev);
98 unsigned int reqq_cnt;
101 spin_lock_bh(&ap_list_lock);
102 for_each_ap_queue(aq, ac)
103 reqq_cnt += aq->requestq_count;
104 spin_unlock_bh(&ap_list_lock);
105 return snprintf(buf, PAGE_SIZE, "%d\n", reqq_cnt);
108 static DEVICE_ATTR(requestq_count, 0444, ap_requestq_count_show, NULL);
110 static ssize_t ap_pendingq_count_show(struct device *dev,
111 struct device_attribute *attr, char *buf)
113 struct ap_card *ac = to_ap_card(dev);
115 unsigned int penq_cnt;
118 spin_lock_bh(&ap_list_lock);
119 for_each_ap_queue(aq, ac)
120 penq_cnt += aq->pendingq_count;
121 spin_unlock_bh(&ap_list_lock);
122 return snprintf(buf, PAGE_SIZE, "%d\n", penq_cnt);
125 static DEVICE_ATTR(pendingq_count, 0444, ap_pendingq_count_show, NULL);
127 static ssize_t ap_modalias_show(struct device *dev,
128 struct device_attribute *attr, char *buf)
130 return sprintf(buf, "ap:t%02X\n", to_ap_dev(dev)->device_type);
133 static DEVICE_ATTR(modalias, 0444, ap_modalias_show, NULL);
135 static struct attribute *ap_card_dev_attrs[] = {
136 &dev_attr_hwtype.attr,
137 &dev_attr_raw_hwtype.attr,
138 &dev_attr_depth.attr,
139 &dev_attr_ap_functions.attr,
140 &dev_attr_request_count.attr,
141 &dev_attr_requestq_count.attr,
142 &dev_attr_pendingq_count.attr,
143 &dev_attr_modalias.attr,
147 static struct attribute_group ap_card_dev_attr_group = {
148 .attrs = ap_card_dev_attrs
151 static const struct attribute_group *ap_card_dev_attr_groups[] = {
152 &ap_card_dev_attr_group,
156 static struct device_type ap_card_type = {
158 .groups = ap_card_dev_attr_groups,
161 static void ap_card_device_release(struct device *dev)
163 kfree(to_ap_card(dev));
166 struct ap_card *ap_card_create(int id, int queue_depth, int device_type,
167 unsigned int functions)
171 ac = kzalloc(sizeof(*ac), GFP_KERNEL);
174 INIT_LIST_HEAD(&ac->queues);
175 ac->ap_dev.device.release = ap_card_device_release;
176 ac->ap_dev.device.type = &ap_card_type;
177 ac->ap_dev.device_type = device_type;
178 /* CEX6 toleration: map to CEX5 */
179 if (device_type == AP_DEVICE_TYPE_CEX6)
180 ac->ap_dev.device_type = AP_DEVICE_TYPE_CEX5;
181 ac->raw_hwtype = device_type;
182 ac->queue_depth = queue_depth;
183 ac->functions = functions;