1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright IBM Corp. 2016 4 * Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com> 5 * 6 * Adjunct processor bus, card related code. 7 */ 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 16 #include "ap_bus.h" 17 18 /* 19 * AP card related attributes. 20 */ 21 static ssize_t 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 scnprintf(buf, PAGE_SIZE, "%d\n", ac->ap_dev.device_type); 27 } 28 29 static DEVICE_ATTR_RO(hwtype); 30 31 static ssize_t 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 scnprintf(buf, PAGE_SIZE, "%d\n", ac->raw_hwtype); 37 } 38 39 static DEVICE_ATTR_RO(raw_hwtype); 40 41 static ssize_t 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 scnprintf(buf, PAGE_SIZE, "%d\n", ac->queue_depth); 47 } 48 49 static DEVICE_ATTR_RO(depth); 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 scnprintf(buf, PAGE_SIZE, "0x%08X\n", ac->functions); 57 } 58 59 static DEVICE_ATTR_RO(ap_functions); 60 61 static ssize_t 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 u64 req_cnt; 67 68 req_cnt = 0; 69 spin_lock_bh(&ap_queues_lock); 70 req_cnt = atomic64_read(&ac->total_request_count); 71 spin_unlock_bh(&ap_queues_lock); 72 return scnprintf(buf, PAGE_SIZE, "%llu\n", req_cnt); 73 } 74 75 static ssize_t request_count_store(struct device *dev, 76 struct device_attribute *attr, 77 const char *buf, size_t count) 78 { 79 int bkt; 80 struct ap_queue *aq; 81 struct ap_card *ac = to_ap_card(dev); 82 83 spin_lock_bh(&ap_queues_lock); 84 hash_for_each(ap_queues, bkt, aq, hnode) 85 if (ac == aq->card) 86 aq->total_request_count = 0; 87 spin_unlock_bh(&ap_queues_lock); 88 atomic64_set(&ac->total_request_count, 0); 89 90 return count; 91 } 92 93 static DEVICE_ATTR_RW(request_count); 94 95 static ssize_t requestq_count_show(struct device *dev, 96 struct device_attribute *attr, char *buf) 97 { 98 int bkt; 99 struct ap_queue *aq; 100 unsigned int reqq_cnt; 101 struct ap_card *ac = to_ap_card(dev); 102 103 reqq_cnt = 0; 104 spin_lock_bh(&ap_queues_lock); 105 hash_for_each(ap_queues, bkt, aq, hnode) 106 if (ac == aq->card) 107 reqq_cnt += aq->requestq_count; 108 spin_unlock_bh(&ap_queues_lock); 109 return scnprintf(buf, PAGE_SIZE, "%d\n", reqq_cnt); 110 } 111 112 static DEVICE_ATTR_RO(requestq_count); 113 114 static ssize_t pendingq_count_show(struct device *dev, 115 struct device_attribute *attr, char *buf) 116 { 117 int bkt; 118 struct ap_queue *aq; 119 unsigned int penq_cnt; 120 struct ap_card *ac = to_ap_card(dev); 121 122 penq_cnt = 0; 123 spin_lock_bh(&ap_queues_lock); 124 hash_for_each(ap_queues, bkt, aq, hnode) 125 if (ac == aq->card) 126 penq_cnt += aq->pendingq_count; 127 spin_unlock_bh(&ap_queues_lock); 128 return scnprintf(buf, PAGE_SIZE, "%d\n", penq_cnt); 129 } 130 131 static DEVICE_ATTR_RO(pendingq_count); 132 133 static ssize_t modalias_show(struct device *dev, 134 struct device_attribute *attr, char *buf) 135 { 136 return scnprintf(buf, PAGE_SIZE, "ap:t%02X\n", 137 to_ap_dev(dev)->device_type); 138 } 139 140 static DEVICE_ATTR_RO(modalias); 141 142 static ssize_t config_show(struct device *dev, 143 struct device_attribute *attr, char *buf) 144 { 145 struct ap_card *ac = to_ap_card(dev); 146 147 return scnprintf(buf, PAGE_SIZE, "%d\n", ac->config ? 1 : 0); 148 } 149 150 static DEVICE_ATTR_RO(config); 151 152 static struct attribute *ap_card_dev_attrs[] = { 153 &dev_attr_hwtype.attr, 154 &dev_attr_raw_hwtype.attr, 155 &dev_attr_depth.attr, 156 &dev_attr_ap_functions.attr, 157 &dev_attr_request_count.attr, 158 &dev_attr_requestq_count.attr, 159 &dev_attr_pendingq_count.attr, 160 &dev_attr_modalias.attr, 161 &dev_attr_config.attr, 162 NULL 163 }; 164 165 static struct attribute_group ap_card_dev_attr_group = { 166 .attrs = ap_card_dev_attrs 167 }; 168 169 static const struct attribute_group *ap_card_dev_attr_groups[] = { 170 &ap_card_dev_attr_group, 171 NULL 172 }; 173 174 static struct device_type ap_card_type = { 175 .name = "ap_card", 176 .groups = ap_card_dev_attr_groups, 177 }; 178 179 static void ap_card_device_release(struct device *dev) 180 { 181 struct ap_card *ac = to_ap_card(dev); 182 183 kfree(ac); 184 } 185 186 struct ap_card *ap_card_create(int id, int queue_depth, int raw_type, 187 int comp_type, unsigned int functions) 188 { 189 struct ap_card *ac; 190 191 ac = kzalloc(sizeof(*ac), GFP_KERNEL); 192 if (!ac) 193 return NULL; 194 ac->ap_dev.device.release = ap_card_device_release; 195 ac->ap_dev.device.type = &ap_card_type; 196 ac->ap_dev.device_type = comp_type; 197 ac->raw_hwtype = raw_type; 198 ac->queue_depth = queue_depth; 199 ac->functions = functions; 200 ac->id = id; 201 return ac; 202 } 203