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- // SPDX-License-Identifier: GPL-2.0
- /*
- * Copyright IBM Corp. 2016
- * Author(s): Martin Schwidefsky <[email protected]>
- *
- * 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 chkstop_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->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 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_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, 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;
- }
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