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