a53c8fab3f
Remove the file name from the comment at top of many files. In most cases the file name was wrong anyway, so it's rather pointless. Also unify the IBM copyright statement. We did have a lot of sightly different statements and wanted to change them one after another whenever a file gets touched. However that never happened. Instead people start to take the old/"wrong" statements to use as a template for new files. So unify all of them in one go. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
145 lines
3.5 KiB
C
145 lines
3.5 KiB
C
/*
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* SCLP OCF communication parameters sysfs interface
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*
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* Copyright IBM Corp. 2011
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* Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
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*/
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#define KMSG_COMPONENT "sclp_ocf"
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#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/stat.h>
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#include <linux/device.h>
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#include <linux/string.h>
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#include <linux/ctype.h>
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#include <linux/kmod.h>
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#include <linux/timer.h>
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#include <linux/err.h>
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#include <asm/ebcdic.h>
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#include <asm/sclp.h>
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#include "sclp.h"
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#define OCF_LENGTH_HMC_NETWORK 8UL
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#define OCF_LENGTH_CPC_NAME 8UL
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static char hmc_network[OCF_LENGTH_HMC_NETWORK + 1];
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static char cpc_name[OCF_LENGTH_CPC_NAME + 1];
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static DEFINE_SPINLOCK(sclp_ocf_lock);
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static struct work_struct sclp_ocf_change_work;
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static struct kset *ocf_kset;
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static void sclp_ocf_change_notify(struct work_struct *work)
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{
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kobject_uevent(&ocf_kset->kobj, KOBJ_CHANGE);
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}
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/* Handler for OCF event. Look for the CPC image name. */
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static void sclp_ocf_handler(struct evbuf_header *evbuf)
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{
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struct gds_vector *v;
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struct gds_subvector *sv, *netid, *cpc;
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size_t size;
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/* Find the 0x9f00 block. */
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v = sclp_find_gds_vector(evbuf + 1, (void *) evbuf + evbuf->length,
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0x9f00);
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if (!v)
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return;
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/* Find the 0x9f22 block inside the 0x9f00 block. */
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v = sclp_find_gds_vector(v + 1, (void *) v + v->length, 0x9f22);
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if (!v)
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return;
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/* Find the 0x81 block inside the 0x9f22 block. */
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sv = sclp_find_gds_subvector(v + 1, (void *) v + v->length, 0x81);
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if (!sv)
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return;
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/* Find the 0x01 block inside the 0x81 block. */
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netid = sclp_find_gds_subvector(sv + 1, (void *) sv + sv->length, 1);
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/* Find the 0x02 block inside the 0x81 block. */
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cpc = sclp_find_gds_subvector(sv + 1, (void *) sv + sv->length, 2);
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/* Copy network name and cpc name. */
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spin_lock(&sclp_ocf_lock);
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if (netid) {
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size = min(OCF_LENGTH_HMC_NETWORK, (size_t) netid->length);
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memcpy(hmc_network, netid + 1, size);
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EBCASC(hmc_network, size);
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hmc_network[size] = 0;
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}
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if (cpc) {
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size = min(OCF_LENGTH_CPC_NAME, (size_t) cpc->length);
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memcpy(cpc_name, cpc + 1, size);
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EBCASC(cpc_name, size);
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cpc_name[size] = 0;
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}
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spin_unlock(&sclp_ocf_lock);
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schedule_work(&sclp_ocf_change_work);
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}
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static struct sclp_register sclp_ocf_event = {
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.receive_mask = EVTYP_OCF_MASK,
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.receiver_fn = sclp_ocf_handler,
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};
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static ssize_t cpc_name_show(struct kobject *kobj,
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struct kobj_attribute *attr, char *page)
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{
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int rc;
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spin_lock_irq(&sclp_ocf_lock);
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rc = snprintf(page, PAGE_SIZE, "%s\n", cpc_name);
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spin_unlock_irq(&sclp_ocf_lock);
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return rc;
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}
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static struct kobj_attribute cpc_name_attr =
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__ATTR(cpc_name, 0444, cpc_name_show, NULL);
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static ssize_t hmc_network_show(struct kobject *kobj,
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struct kobj_attribute *attr, char *page)
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{
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int rc;
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spin_lock_irq(&sclp_ocf_lock);
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rc = snprintf(page, PAGE_SIZE, "%s\n", hmc_network);
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spin_unlock_irq(&sclp_ocf_lock);
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return rc;
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}
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static struct kobj_attribute hmc_network_attr =
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__ATTR(hmc_network, 0444, hmc_network_show, NULL);
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static struct attribute *ocf_attrs[] = {
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&cpc_name_attr.attr,
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&hmc_network_attr.attr,
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NULL,
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};
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static struct attribute_group ocf_attr_group = {
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.attrs = ocf_attrs,
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};
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static int __init ocf_init(void)
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{
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int rc;
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INIT_WORK(&sclp_ocf_change_work, sclp_ocf_change_notify);
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ocf_kset = kset_create_and_add("ocf", NULL, firmware_kobj);
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if (!ocf_kset)
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return -ENOMEM;
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rc = sysfs_create_group(&ocf_kset->kobj, &ocf_attr_group);
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if (rc) {
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kset_unregister(ocf_kset);
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return rc;
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}
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return sclp_register(&sclp_ocf_event);
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}
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device_initcall(ocf_init);
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