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![Harald Freudenberger](/assets/img/avatar_default.png)
A crypto card may be in checkstopped state. With this patch this is handled as a new state in the ap card and ap queue structs. There is also a new card sysfs attribute /sys/devices/ap/cardxx/chkstop and a new queue sysfs attribute /sys/devices/ap/cardxx/xx.yyyy/chkstop displaying the checkstop state of the card or queue. Please note that the queue's checkstop state is only a copy of the card's checkstop state but makes maintenance much easier. The checkstop state expressed here is the result of an RC 0x04 (CHECKSTOP) during an AP command, mostly the PQAP(TAPQ) command which is 'testing' the queue. Signed-off-by: Harald Freudenberger <freude@linux.ibm.com> Reviewed-by: Jürgen Christ <jchrist@linux.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
252 lines
5.8 KiB
C
252 lines
5.8 KiB
C
// 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 <schwidefsky@de.ibm.com>
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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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ap_send_config_uevent(&ac->ap_dev, ac->config);
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return count;
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}
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static DEVICE_ATTR_RW(config);
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static ssize_t chkstop_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->chkstop ? 1 : 0);
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}
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static DEVICE_ATTR_RO(chkstop);
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static ssize_t max_msg_size_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, "%u\n", ac->maxmsgsize);
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}
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static DEVICE_ATTR_RO(max_msg_size);
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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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&dev_attr_chkstop.attr,
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&dev_attr_max_msg_size.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, int ml)
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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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ac->maxmsgsize = ml > 0 ?
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ml * AP_TAPQ_ML_FIELD_CHUNK_SIZE : AP_DEFAULT_MAX_MSG_SIZE;
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return ac;
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}
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