Release 4.7 drivers/s390/char/sclp_config.c
/*
* Copyright IBM Corp. 2007
* Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>
*/
#define KMSG_COMPONENT "sclp_config"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/cpu.h>
#include <linux/device.h>
#include <linux/workqueue.h>
#include <linux/slab.h>
#include <linux/sysfs.h>
#include <asm/smp.h>
#include "sclp.h"
struct conf_mgm_data {
u8 reserved;
u8 ev_qualifier;
} __attribute__((packed));
#define OFB_DATA_MAX 64
struct sclp_ofb_evbuf {
struct evbuf_header header;
struct conf_mgm_data cm_data;
char ev_data[OFB_DATA_MAX];
}
__packed;
struct sclp_ofb_sccb {
struct sccb_header header;
struct sclp_ofb_evbuf ofb_evbuf;
}
__packed;
#define EV_QUAL_CPU_CHANGE 1
#define EV_QUAL_CAP_CHANGE 3
#define EV_QUAL_OPEN4BUSINESS 5
static struct work_struct sclp_cpu_capability_work;
static struct work_struct sclp_cpu_change_work;
static void sclp_cpu_capability_notify(struct work_struct *work)
{
int cpu;
struct device *dev;
s390_adjust_jiffies();
pr_info("CPU capability may have changed\n");
get_online_cpus();
for_each_online_cpu(cpu) {
dev = get_cpu_device(cpu);
kobject_uevent(&dev->kobj, KOBJ_CHANGE);
}
put_online_cpus();
}
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| heiko carstens | heiko carstens | 48 | 85.71% | 3 | 50.00% |
| kay sievers | kay sievers | 5 | 8.93% | 1 | 16.67% |
| gautham r shenoy | gautham r shenoy | 2 | 3.57% | 1 | 16.67% |
| martin schwidefsky | martin schwidefsky | 1 | 1.79% | 1 | 16.67% |
| Total | 56 | 100.00% | 6 | 100.00% |
static void __ref sclp_cpu_change_notify(struct work_struct *work)
{
smp_rescan_cpus();
}
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| heiko carstens | heiko carstens | 15 | 100.00% | 3 | 100.00% |
| Total | 15 | 100.00% | 3 | 100.00% |
static void sclp_conf_receiver_fn(struct evbuf_header *evbuf)
{
struct conf_mgm_data *cdata;
cdata = (struct conf_mgm_data *)(evbuf + 1);
switch (cdata->ev_qualifier) {
case EV_QUAL_CPU_CHANGE:
schedule_work(&sclp_cpu_change_work);
break;
case EV_QUAL_CAP_CHANGE:
schedule_work(&sclp_cpu_capability_work);
break;
}
}
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| heiko carstens | heiko carstens | 57 | 100.00% | 2 | 100.00% |
| Total | 57 | 100.00% | 2 | 100.00% |
static struct sclp_register sclp_conf_register =
{
#ifdef CONFIG_SCLP_OFB
.send_mask = EVTYP_CONFMGMDATA_MASK,
#endif
.receive_mask = EVTYP_CONFMGMDATA_MASK,
.receiver_fn = sclp_conf_receiver_fn,
};
#ifdef CONFIG_SCLP_OFB
static int sclp_ofb_send_req(char *ev_data, size_t len)
{
static DEFINE_MUTEX(send_mutex);
struct sclp_ofb_sccb *sccb;
int rc, response;
if (len > OFB_DATA_MAX)
return -EINVAL;
sccb = (struct sclp_ofb_sccb *) get_zeroed_page(GFP_KERNEL | GFP_DMA);
if (!sccb)
return -ENOMEM;
/* Setup SCCB for Control-Program Identification */
sccb->header.length = sizeof(struct sclp_ofb_sccb);
sccb->ofb_evbuf.header.length = sizeof(struct sclp_ofb_evbuf);
sccb->ofb_evbuf.header.type = EVTYP_CONFMGMDATA;
sccb->ofb_evbuf.cm_data.ev_qualifier = EV_QUAL_OPEN4BUSINESS;
memcpy(sccb->ofb_evbuf.ev_data, ev_data, len);
if (!(sclp_conf_register.sclp_receive_mask & EVTYP_CONFMGMDATA_MASK))
pr_warn("SCLP receiver did not register to receive "
"Configuration Management Data Events.\n");
mutex_lock(&send_mutex);
rc = sclp_sync_request(SCLP_CMDW_WRITE_EVENT_DATA, sccb);
mutex_unlock(&send_mutex);
if (rc)
goto out;
response = sccb->header.response_code;
if (response != 0x0020) {
pr_err("Open for Business request failed with response code "
"0x%04x\n", response);
rc = -EIO;
}
out:
free_page((unsigned long)sccb);
return rc;
}
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| Total | 210 | 100.00% | 1 | 100.00% |
static ssize_t sysfs_ofb_data_write(struct file *filp, struct kobject *kobj,
struct bin_attribute *bin_attr,
char *buf, loff_t off, size_t count)
{
int rc;
rc = sclp_ofb_send_req(buf, count);
return rc ?: count;
}
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| Total | 49 | 100.00% | 1 | 100.00% |
static struct bin_attribute ofb_bin_attr = {
.attr = {
.name = "event_data",
.mode = S_IWUSR,
},
.write = sysfs_ofb_data_write,
};
#endif
static int __init sclp_ofb_setup(void)
{
#ifdef CONFIG_SCLP_OFB
struct kset *ofb_kset;
int rc;
ofb_kset = kset_create_and_add("ofb", NULL, firmware_kobj);
if (!ofb_kset)
return -ENOMEM;
rc = sysfs_create_bin_file(&ofb_kset->kobj, &ofb_bin_attr);
if (rc) {
kset_unregister(ofb_kset);
return rc;
}
#endif
return 0;
}
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| Person | Tokens | Prop | Commits | CommitProp |
| jochen schweflinghaus | jochen schweflinghaus | 72 | 100.00% | 1 | 100.00% |
| Total | 72 | 100.00% | 1 | 100.00% |
static int __init sclp_conf_init(void)
{
int rc;
INIT_WORK(&sclp_cpu_capability_work, sclp_cpu_capability_notify);
INIT_WORK(&sclp_cpu_change_work, sclp_cpu_change_notify);
rc = sclp_register(&sclp_conf_register);
if (rc)
return rc;
return sclp_ofb_setup();
}
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| Person | Tokens | Prop | Commits | CommitProp |
| heiko carstens | heiko carstens | 31 | 65.96% | 3 | 75.00% |
| jochen schweflinghaus | jochen schweflinghaus | 16 | 34.04% | 1 | 25.00% |
| Total | 47 | 100.00% | 4 | 100.00% |
__initcall(sclp_conf_init);
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| jochen schweflinghaus | jochen schweflinghaus | 437 | 63.70% | 1 | 8.33% |
| heiko carstens | heiko carstens | 229 | 33.38% | 8 | 66.67% |
| martin schwidefsky | martin schwidefsky | 12 | 1.75% | 1 | 8.33% |
| kay sievers | kay sievers | 6 | 0.87% | 1 | 8.33% |
| gautham r shenoy | gautham r shenoy | 2 | 0.29% | 1 | 8.33% |
| Total | 686 | 100.00% | 12 | 100.00% |
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