// SPDX-License-Identifier: GPL-2.0 /* * Copyright IBM Corp. 2016 * Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com> * * Adjunct processor bus, card related code. */ #define KMSG_COMPONENT "ap" #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt #include <linux/init.h> #include <linux/slab.h> #include <asm/facility.h> #include <asm/sclp.h> #include "ap_bus.h" /* * AP card related attributes. */ static ssize_t hwtype_show(struct device *dev, struct device_attribute *attr, char *buf) { struct ap_card *ac = to_ap_card(dev); return sysfs_emit(buf, "%d\n", ac->ap_dev.device_type); } static DEVICE_ATTR_RO(hwtype); static ssize_t raw_hwtype_show(struct device *dev, struct device_attribute *attr, char *buf) { struct ap_card *ac = to_ap_card(dev); return sysfs_emit(buf, "%d\n", ac->hwinfo.at); } static DEVICE_ATTR_RO(raw_hwtype); static ssize_t depth_show(struct device *dev, struct device_attribute *attr, char *buf) { struct ap_card *ac = to_ap_card(dev); return sysfs_emit(buf, "%d\n", ac->hwinfo.qd); } static DEVICE_ATTR_RO(depth); static ssize_t ap_functions_show(struct device *dev, struct device_attribute *attr, char *buf) { struct ap_card *ac = to_ap_card(dev); return sysfs_emit(buf, "0x%08X\n", ac->hwinfo.fac); } static DEVICE_ATTR_RO(ap_functions); static ssize_t request_count_show(struct device *dev, struct device_attribute *attr, char *buf) { struct ap_card *ac = to_ap_card(dev); u64 req_cnt; req_cnt = 0; spin_lock_bh(&ap_queues_lock); req_cnt = atomic64_read(&ac->total_request_count); spin_unlock_bh(&ap_queues_lock); return sysfs_emit(buf, "%llu\n", req_cnt); } static ssize_t request_count_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { int bkt; struct ap_queue *aq; struct ap_card *ac = to_ap_card(dev); spin_lock_bh(&ap_queues_lock); hash_for_each(ap_queues, bkt, aq, hnode) if (ac == aq->card) aq->total_request_count = 0; spin_unlock_bh(&ap_queues_lock); atomic64_set(&ac->total_request_count, 0); return count; } static DEVICE_ATTR_RW(request_count); static ssize_t requestq_count_show(struct device *dev, struct device_attribute *attr, char *buf) { int bkt; struct ap_queue *aq; unsigned int reqq_cnt; struct ap_card *ac = to_ap_card(dev); reqq_cnt = 0; spin_lock_bh(&ap_queues_lock); hash_for_each(ap_queues, bkt, aq, hnode) if (ac == aq->card) reqq_cnt += aq->requestq_count; spin_unlock_bh(&ap_queues_lock); return sysfs_emit(buf, "%d\n", reqq_cnt); } static DEVICE_ATTR_RO(requestq_count); static ssize_t pendingq_count_show(struct device *dev, struct device_attribute *attr, char *buf) { int bkt; struct ap_queue *aq; unsigned int penq_cnt; struct ap_card *ac = to_ap_card(dev); penq_cnt = 0; spin_lock_bh(&ap_queues_lock); hash_for_each(ap_queues, bkt, aq, hnode) if (ac == aq->card) penq_cnt += aq->pendingq_count; spin_unlock_bh(&ap_queues_lock); return sysfs_emit(buf, "%d\n", penq_cnt); } static DEVICE_ATTR_RO(pendingq_count); static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf) { return sysfs_emit(buf, "ap:t%02X\n", to_ap_dev(dev)->device_type); } static DEVICE_ATTR_RO(modalias); static ssize_t config_show(struct device *dev, struct device_attribute *attr, char *buf) { struct ap_card *ac = to_ap_card(dev); return sysfs_emit(buf, "%d\n", ac->config ? 1 : 0); } static ssize_t config_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { int rc = 0, cfg; struct ap_card *ac = to_ap_card(dev); if (sscanf(buf, "%d\n", &cfg) != 1 || cfg < 0 || cfg > 1) return -EINVAL; if (cfg && !ac->config) rc = sclp_ap_configure(ac->id); else if (!cfg && ac->config) rc = sclp_ap_deconfigure(ac->id); if (rc) return rc; ac->config = cfg ? true : false; ap_send_config_uevent(&ac->ap_dev, ac->config); return count; } static DEVICE_ATTR_RW(config); static ssize_t chkstop_show(struct device *dev, struct device_attribute *attr, char *buf) { struct ap_card *ac = to_ap_card(dev); return sysfs_emit(buf, "%d\n", ac->chkstop ? 1 : 0); } static DEVICE_ATTR_RO(chkstop); static ssize_t max_msg_size_show(struct device *dev, struct device_attribute *attr, char *buf) { struct ap_card *ac = to_ap_card(dev); return sysfs_emit(buf, "%u\n", ac->maxmsgsize); } static DEVICE_ATTR_RO(max_msg_size); static struct attribute *ap_card_dev_attrs[] = { &dev_attr_hwtype.attr, &dev_attr_raw_hwtype.attr, &dev_attr_depth.attr, &dev_attr_ap_functions.attr, &dev_attr_request_count.attr, &dev_attr_requestq_count.attr, &dev_attr_pendingq_count.attr, &dev_attr_modalias.attr, &dev_attr_config.attr, &dev_attr_chkstop.attr, &dev_attr_max_msg_size.attr, NULL }; static struct attribute_group ap_card_dev_attr_group = { .attrs = ap_card_dev_attrs }; static const struct attribute_group *ap_card_dev_attr_groups[] = { &ap_card_dev_attr_group, NULL }; static struct device_type ap_card_type = { .name = "ap_card", .groups = ap_card_dev_attr_groups, }; static void ap_card_device_release(struct device *dev) { struct ap_card *ac = to_ap_card(dev); kfree(ac); } struct ap_card *ap_card_create(int id, struct ap_tapq_hwinfo hwinfo, int comp_type) { struct ap_card *ac; ac = kzalloc(sizeof(*ac), GFP_KERNEL); if (!ac) return NULL; ac->ap_dev.device.release = ap_card_device_release; ac->ap_dev.device.type = &ap_card_type; ac->ap_dev.device_type = comp_type; ac->hwinfo = hwinfo; ac->id = id; ac->maxmsgsize = hwinfo.ml > 0 ? hwinfo.ml * AP_TAPQ_ML_FIELD_CHUNK_SIZE : AP_DEFAULT_MAX_MSG_SIZE; return ac; }