1 /* 2 * Copyright IBM Corp. 2016 3 * Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com> 4 * 5 * Adjunct processor bus, card related code. 6 */ 7 8 #define KMSG_COMPONENT "ap" 9 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt 10 11 #include <linux/init.h> 12 #include <linux/slab.h> 13 #include <asm/facility.h> 14 15 #include "ap_bus.h" 16 #include "ap_asm.h" 17 18 /* 19 * AP card related attributes. 20 */ 21 static ssize_t ap_hwtype_show(struct device *dev, 22 struct device_attribute *attr, char *buf) 23 { 24 struct ap_card *ac = to_ap_card(dev); 25 26 return snprintf(buf, PAGE_SIZE, "%d\n", ac->ap_dev.device_type); 27 } 28 29 static DEVICE_ATTR(hwtype, 0444, ap_hwtype_show, NULL); 30 31 static ssize_t ap_raw_hwtype_show(struct device *dev, 32 struct device_attribute *attr, char *buf) 33 { 34 struct ap_card *ac = to_ap_card(dev); 35 36 return snprintf(buf, PAGE_SIZE, "%d\n", ac->raw_hwtype); 37 } 38 39 static DEVICE_ATTR(raw_hwtype, 0444, ap_raw_hwtype_show, NULL); 40 41 static ssize_t ap_depth_show(struct device *dev, struct device_attribute *attr, 42 char *buf) 43 { 44 struct ap_card *ac = to_ap_card(dev); 45 46 return snprintf(buf, PAGE_SIZE, "%d\n", ac->queue_depth); 47 } 48 49 static DEVICE_ATTR(depth, 0444, ap_depth_show, NULL); 50 51 static ssize_t ap_functions_show(struct device *dev, 52 struct device_attribute *attr, char *buf) 53 { 54 struct ap_card *ac = to_ap_card(dev); 55 56 return snprintf(buf, PAGE_SIZE, "0x%08X\n", ac->functions); 57 } 58 59 static DEVICE_ATTR(ap_functions, 0444, ap_functions_show, NULL); 60 61 static ssize_t ap_request_count_show(struct device *dev, 62 struct device_attribute *attr, 63 char *buf) 64 { 65 struct ap_card *ac = to_ap_card(dev); 66 unsigned int req_cnt; 67 68 req_cnt = 0; 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); 73 } 74 75 static DEVICE_ATTR(request_count, 0444, ap_request_count_show, NULL); 76 77 static ssize_t ap_requestq_count_show(struct device *dev, 78 struct device_attribute *attr, char *buf) 79 { 80 struct ap_card *ac = to_ap_card(dev); 81 struct ap_queue *aq; 82 unsigned int reqq_cnt; 83 84 reqq_cnt = 0; 85 spin_lock_bh(&ap_list_lock); 86 for_each_ap_queue(aq, ac) 87 reqq_cnt += aq->requestq_count; 88 spin_unlock_bh(&ap_list_lock); 89 return snprintf(buf, PAGE_SIZE, "%d\n", reqq_cnt); 90 } 91 92 static DEVICE_ATTR(requestq_count, 0444, ap_requestq_count_show, NULL); 93 94 static ssize_t ap_pendingq_count_show(struct device *dev, 95 struct device_attribute *attr, char *buf) 96 { 97 struct ap_card *ac = to_ap_card(dev); 98 struct ap_queue *aq; 99 unsigned int penq_cnt; 100 101 penq_cnt = 0; 102 spin_lock_bh(&ap_list_lock); 103 for_each_ap_queue(aq, ac) 104 penq_cnt += aq->pendingq_count; 105 spin_unlock_bh(&ap_list_lock); 106 return snprintf(buf, PAGE_SIZE, "%d\n", penq_cnt); 107 } 108 109 static DEVICE_ATTR(pendingq_count, 0444, ap_pendingq_count_show, NULL); 110 111 static ssize_t ap_modalias_show(struct device *dev, 112 struct device_attribute *attr, char *buf) 113 { 114 return sprintf(buf, "ap:t%02X\n", to_ap_dev(dev)->device_type); 115 } 116 117 static DEVICE_ATTR(modalias, 0444, ap_modalias_show, NULL); 118 119 static struct attribute *ap_card_dev_attrs[] = { 120 &dev_attr_hwtype.attr, 121 &dev_attr_raw_hwtype.attr, 122 &dev_attr_depth.attr, 123 &dev_attr_ap_functions.attr, 124 &dev_attr_request_count.attr, 125 &dev_attr_requestq_count.attr, 126 &dev_attr_pendingq_count.attr, 127 &dev_attr_modalias.attr, 128 NULL 129 }; 130 131 static struct attribute_group ap_card_dev_attr_group = { 132 .attrs = ap_card_dev_attrs 133 }; 134 135 static const struct attribute_group *ap_card_dev_attr_groups[] = { 136 &ap_card_dev_attr_group, 137 NULL 138 }; 139 140 static struct device_type ap_card_type = { 141 .name = "ap_card", 142 .groups = ap_card_dev_attr_groups, 143 }; 144 145 static void ap_card_device_release(struct device *dev) 146 { 147 kfree(to_ap_card(dev)); 148 } 149 150 struct ap_card *ap_card_create(int id, int queue_depth, int device_type, 151 unsigned int functions) 152 { 153 struct ap_card *ac; 154 155 ac = kzalloc(sizeof(*ac), GFP_KERNEL); 156 if (!ac) 157 return NULL; 158 INIT_LIST_HEAD(&ac->queues); 159 ac->ap_dev.device.release = ap_card_device_release; 160 ac->ap_dev.device.type = &ap_card_type; 161 ac->ap_dev.device_type = device_type; 162 /* CEX6 toleration: map to CEX5 */ 163 if (device_type == AP_DEVICE_TYPE_CEX6) 164 ac->ap_dev.device_type = AP_DEVICE_TYPE_CEX5; 165 ac->raw_hwtype = device_type; 166 ac->queue_depth = queue_depth; 167 ac->functions = functions; 168 ac->id = id; 169 return ac; 170 } 171