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 #include "ap_asm.h" 18 19 /* 20 * AP card related attributes. 21 */ 22 static ssize_t ap_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 snprintf(buf, PAGE_SIZE, "%d\n", ac->ap_dev.device_type); 28 } 29 30 static DEVICE_ATTR(hwtype, 0444, ap_hwtype_show, NULL); 31 32 static ssize_t ap_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 snprintf(buf, PAGE_SIZE, "%d\n", ac->raw_hwtype); 38 } 39 40 static DEVICE_ATTR(raw_hwtype, 0444, ap_raw_hwtype_show, NULL); 41 42 static ssize_t ap_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 snprintf(buf, PAGE_SIZE, "%d\n", ac->queue_depth); 48 } 49 50 static DEVICE_ATTR(depth, 0444, ap_depth_show, NULL); 51 52 static 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 snprintf(buf, PAGE_SIZE, "0x%08X\n", ac->functions); 58 } 59 60 static DEVICE_ATTR_RO(ap_functions); 61 62 static ssize_t ap_req_count_show(struct device *dev, 63 struct device_attribute *attr, 64 char *buf) 65 { 66 struct ap_card *ac = to_ap_card(dev); 67 unsigned int req_cnt; 68 69 req_cnt = 0; 70 spin_lock_bh(&ap_list_lock); 71 req_cnt = atomic_read(&ac->total_request_count); 72 spin_unlock_bh(&ap_list_lock); 73 return snprintf(buf, PAGE_SIZE, "%d\n", req_cnt); 74 } 75 76 static ssize_t ap_req_count_store(struct device *dev, 77 struct device_attribute *attr, 78 const char *buf, size_t count) 79 { 80 struct ap_card *ac = to_ap_card(dev); 81 struct ap_queue *aq; 82 83 spin_lock_bh(&ap_list_lock); 84 for_each_ap_queue(aq, ac) 85 aq->total_request_count = 0; 86 spin_unlock_bh(&ap_list_lock); 87 atomic_set(&ac->total_request_count, 0); 88 89 return count; 90 } 91 92 static DEVICE_ATTR(request_count, 0644, ap_req_count_show, ap_req_count_store); 93 94 static ssize_t ap_requestq_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 reqq_cnt; 100 101 reqq_cnt = 0; 102 spin_lock_bh(&ap_list_lock); 103 for_each_ap_queue(aq, ac) 104 reqq_cnt += aq->requestq_count; 105 spin_unlock_bh(&ap_list_lock); 106 return snprintf(buf, PAGE_SIZE, "%d\n", reqq_cnt); 107 } 108 109 static DEVICE_ATTR(requestq_count, 0444, ap_requestq_count_show, NULL); 110 111 static ssize_t ap_pendingq_count_show(struct device *dev, 112 struct device_attribute *attr, char *buf) 113 { 114 struct ap_card *ac = to_ap_card(dev); 115 struct ap_queue *aq; 116 unsigned int penq_cnt; 117 118 penq_cnt = 0; 119 spin_lock_bh(&ap_list_lock); 120 for_each_ap_queue(aq, ac) 121 penq_cnt += aq->pendingq_count; 122 spin_unlock_bh(&ap_list_lock); 123 return snprintf(buf, PAGE_SIZE, "%d\n", penq_cnt); 124 } 125 126 static DEVICE_ATTR(pendingq_count, 0444, ap_pendingq_count_show, NULL); 127 128 static ssize_t ap_modalias_show(struct device *dev, 129 struct device_attribute *attr, char *buf) 130 { 131 return sprintf(buf, "ap:t%02X\n", to_ap_dev(dev)->device_type); 132 } 133 134 static DEVICE_ATTR(modalias, 0444, ap_modalias_show, NULL); 135 136 static struct attribute *ap_card_dev_attrs[] = { 137 &dev_attr_hwtype.attr, 138 &dev_attr_raw_hwtype.attr, 139 &dev_attr_depth.attr, 140 &dev_attr_ap_functions.attr, 141 &dev_attr_request_count.attr, 142 &dev_attr_requestq_count.attr, 143 &dev_attr_pendingq_count.attr, 144 &dev_attr_modalias.attr, 145 NULL 146 }; 147 148 static struct attribute_group ap_card_dev_attr_group = { 149 .attrs = ap_card_dev_attrs 150 }; 151 152 static const struct attribute_group *ap_card_dev_attr_groups[] = { 153 &ap_card_dev_attr_group, 154 NULL 155 }; 156 157 static struct device_type ap_card_type = { 158 .name = "ap_card", 159 .groups = ap_card_dev_attr_groups, 160 }; 161 162 static void ap_card_device_release(struct device *dev) 163 { 164 struct ap_card *ac = to_ap_card(dev); 165 166 if (!list_empty(&ac->list)) { 167 spin_lock_bh(&ap_list_lock); 168 list_del_init(&ac->list); 169 spin_unlock_bh(&ap_list_lock); 170 } 171 kfree(ac); 172 } 173 174 struct ap_card *ap_card_create(int id, int queue_depth, int raw_type, 175 int comp_type, unsigned int functions) 176 { 177 struct ap_card *ac; 178 179 ac = kzalloc(sizeof(*ac), GFP_KERNEL); 180 if (!ac) 181 return NULL; 182 INIT_LIST_HEAD(&ac->list); 183 INIT_LIST_HEAD(&ac->queues); 184 ac->ap_dev.device.release = ap_card_device_release; 185 ac->ap_dev.device.type = &ap_card_type; 186 ac->ap_dev.device_type = comp_type; 187 ac->raw_hwtype = raw_type; 188 ac->queue_depth = queue_depth; 189 ac->functions = functions; 190 ac->id = id; 191 return ac; 192 } 193