226 lines
5.1 KiB
C
226 lines
5.1 KiB
C
// 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;
|
|
|
|
return count;
|
|
}
|
|
|
|
static DEVICE_ATTR_RW(config);
|
|
|
|
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,
|
|
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)
|
|
{
|
|
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;
|
|
return ac;
|
|
}
|