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1// SPDX-License-Identifier: GPL-2.02/*3 * Copyright IBM Corp. 20164 * 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 ": " fmt11 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 * AP card related attributes.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 sysfs_emit(buf, "%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 sysfs_emit(buf, "%d\n", ac->hwinfo.at);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 sysfs_emit(buf, "%d\n", ac->hwinfo.qd);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 sysfs_emit(buf, "0x%08X\n", ac->hwinfo.fac);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 sysfs_emit(buf, "%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 sysfs_emit(buf, "%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 sysfs_emit(buf, "%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 sysfs_emit(buf, "ap:t%02X\n", to_ap_dev(dev)->device_type);138}139 140static DEVICE_ATTR_RO(modalias);141 142static 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 sysfs_emit(buf, "%d\n", ac->config ? 1 : 0);148}149 150static ssize_t config_store(struct device *dev,151 struct device_attribute *attr,152 const char *buf, size_t count)153{154 int rc = 0, cfg;155 struct ap_card *ac = to_ap_card(dev);156 157 if (sscanf(buf, "%d\n", &cfg) != 1 || cfg < 0 || cfg > 1)158 return -EINVAL;159 160 if (cfg && !ac->config)161 rc = sclp_ap_configure(ac->id);162 else if (!cfg && ac->config)163 rc = sclp_ap_deconfigure(ac->id);164 if (rc)165 return rc;166 167 ac->config = cfg ? true : false;168 169 ap_send_config_uevent(&ac->ap_dev, ac->config);170 171 return count;172}173 174static DEVICE_ATTR_RW(config);175 176static ssize_t chkstop_show(struct device *dev,177 struct device_attribute *attr, char *buf)178{179 struct ap_card *ac = to_ap_card(dev);180 181 return sysfs_emit(buf, "%d\n", ac->chkstop ? 1 : 0);182}183 184static DEVICE_ATTR_RO(chkstop);185 186static ssize_t max_msg_size_show(struct device *dev,187 struct device_attribute *attr, char *buf)188{189 struct ap_card *ac = to_ap_card(dev);190 191 return sysfs_emit(buf, "%u\n", ac->maxmsgsize);192}193 194static DEVICE_ATTR_RO(max_msg_size);195 196static struct attribute *ap_card_dev_attrs[] = {197 &dev_attr_hwtype.attr,198 &dev_attr_raw_hwtype.attr,199 &dev_attr_depth.attr,200 &dev_attr_ap_functions.attr,201 &dev_attr_request_count.attr,202 &dev_attr_requestq_count.attr,203 &dev_attr_pendingq_count.attr,204 &dev_attr_modalias.attr,205 &dev_attr_config.attr,206 &dev_attr_chkstop.attr,207 &dev_attr_max_msg_size.attr,208 NULL209};210 211static struct attribute_group ap_card_dev_attr_group = {212 .attrs = ap_card_dev_attrs213};214 215static const struct attribute_group *ap_card_dev_attr_groups[] = {216 &ap_card_dev_attr_group,217 NULL218};219 220static struct device_type ap_card_type = {221 .name = "ap_card",222 .groups = ap_card_dev_attr_groups,223};224 225static void ap_card_device_release(struct device *dev)226{227 struct ap_card *ac = to_ap_card(dev);228 229 kfree(ac);230}231 232struct ap_card *ap_card_create(int id, struct ap_tapq_hwinfo hwinfo,233 int comp_type)234{235 struct ap_card *ac;236 237 ac = kzalloc(sizeof(*ac), GFP_KERNEL);238 if (!ac)239 return NULL;240 ac->ap_dev.device.release = ap_card_device_release;241 ac->ap_dev.device.type = &ap_card_type;242 ac->ap_dev.device_type = comp_type;243 ac->hwinfo = hwinfo;244 ac->id = id;245 ac->maxmsgsize = hwinfo.ml > 0 ?246 hwinfo.ml * AP_TAPQ_ML_FIELD_CHUNK_SIZE : AP_DEFAULT_MAX_MSG_SIZE;247 248 return ac;249}250