| // 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 scnprintf(buf, PAGE_SIZE, "%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 scnprintf(buf, PAGE_SIZE, "%d\n", ac->raw_hwtype); |
| } |
| |
| 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 scnprintf(buf, PAGE_SIZE, "%d\n", ac->queue_depth); |
| } |
| |
| 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 scnprintf(buf, PAGE_SIZE, "0x%08X\n", ac->functions); |
| } |
| |
| 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 scnprintf(buf, PAGE_SIZE, "%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 scnprintf(buf, PAGE_SIZE, "%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 scnprintf(buf, PAGE_SIZE, "%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 scnprintf(buf, PAGE_SIZE, "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 scnprintf(buf, PAGE_SIZE, "%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 max_msg_size_show(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct ap_card *ac = to_ap_card(dev); |
| |
| return scnprintf(buf, PAGE_SIZE, "%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_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, int queue_depth, int raw_type, |
| int comp_type, unsigned int functions, int ml) |
| { |
| 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->raw_hwtype = raw_type; |
| ac->queue_depth = queue_depth; |
| ac->functions = functions; |
| ac->id = id; |
| ac->maxmsgsize = ml > 0 ? |
| ml * AP_TAPQ_ML_FIELD_CHUNK_SIZE : AP_DEFAULT_MAX_MSG_SIZE; |
| |
| return ac; |
| } |