/*
- * Author: Martin Peschke <mpeschke@de.ibm.com>
- * Copyright (C) 2001 IBM Entwicklung GmbH, IBM Corporation
+ * drivers/s390/char/sclp_cpi.c
+ * SCLP control programm identification
*
- * SCLP Control-Program Identification.
+ * Copyright IBM Corp. 2001, 2007
+ * Author(s): Martin Peschke <mpeschke@de.ibm.com>
+ * Michael Ernst <mernst@de.ibm.com>
*/
-#include <linux/version.h>
#include <linux/kmod.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
-#include <linux/init.h>
-#include <linux/timer.h>
-#include <linux/string.h>
-#include <linux/err.h>
-#include <linux/slab.h>
-#include <asm/ebcdic.h>
-#include <asm/semaphore.h>
-
-#include "sclp.h"
-#include "sclp_rw.h"
-
-#define CPI_LENGTH_SYSTEM_TYPE 8
-#define CPI_LENGTH_SYSTEM_NAME 8
-#define CPI_LENGTH_SYSPLEX_NAME 8
-
-struct cpi_evbuf {
- struct evbuf_header header;
- u8 id_format;
- u8 reserved0;
- u8 system_type[CPI_LENGTH_SYSTEM_TYPE];
- u64 reserved1;
- u8 system_name[CPI_LENGTH_SYSTEM_NAME];
- u64 reserved2;
- u64 system_level;
- u64 reserved3;
- u8 sysplex_name[CPI_LENGTH_SYSPLEX_NAME];
- u8 reserved4[16];
-} __attribute__((packed));
-
-struct cpi_sccb {
- struct sccb_header header;
- struct cpi_evbuf cpi_evbuf;
-} __attribute__((packed));
-
-/* Event type structure for write message and write priority message */
-static struct sclp_register sclp_cpi_event =
-{
- .send_mask = EVTYP_CTLPROGIDENT_MASK
-};
+#include <linux/version.h>
+#include "sclp_cpi_sys.h"
MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Identify this operating system instance "
+ "to the System z hardware");
+MODULE_AUTHOR("Martin Peschke <mpeschke@de.ibm.com>, "
+ "Michael Ernst <mernst@de.ibm.com>");
-MODULE_AUTHOR(
- "Martin Peschke, IBM Deutschland Entwicklung GmbH "
- "<mpeschke@de.ibm.com>");
-
-MODULE_DESCRIPTION(
- "identify this operating system instance to the S/390 "
- "or zSeries hardware");
+static char *system_name = "";
+static char *sysplex_name = "";
-static char *system_name = NULL;
module_param(system_name, charp, 0);
MODULE_PARM_DESC(system_name, "e.g. hostname - max. 8 characters");
-
-static char *sysplex_name = NULL;
-#ifdef ALLOW_SYSPLEX_NAME
module_param(sysplex_name, charp, 0);
MODULE_PARM_DESC(sysplex_name, "if applicable - max. 8 characters");
-#endif
-
-/* use default value for this field (as well as for system level) */
-static char *system_type = "LINUX";
-static int
-cpi_check_parms(void)
+static int __init cpi_module_init(void)
{
- /* reject if no system type specified */
- if (!system_type) {
- printk("cpi: bug: no system type specified\n");
- return -EINVAL;
- }
-
- /* reject if system type larger than 8 characters */
- if (strlen(system_type) > CPI_LENGTH_SYSTEM_NAME) {
- printk("cpi: bug: system type has length of %li characters - "
- "only %i characters supported\n",
- strlen(system_type), CPI_LENGTH_SYSTEM_TYPE);
- return -EINVAL;
- }
-
- /* reject if no system name specified */
- if (!system_name) {
- printk("cpi: no system name specified\n");
- return -EINVAL;
- }
-
- /* reject if system name larger than 8 characters */
- if (strlen(system_name) > CPI_LENGTH_SYSTEM_NAME) {
- printk("cpi: system name has length of %li characters - "
- "only %i characters supported\n",
- strlen(system_name), CPI_LENGTH_SYSTEM_NAME);
- return -EINVAL;
- }
-
- /* reject if specified sysplex name larger than 8 characters */
- if (sysplex_name && strlen(sysplex_name) > CPI_LENGTH_SYSPLEX_NAME) {
- printk("cpi: sysplex name has length of %li characters"
- " - only %i characters supported\n",
- strlen(sysplex_name), CPI_LENGTH_SYSPLEX_NAME);
- return -EINVAL;
- }
- return 0;
+ return sclp_cpi_set_data(system_name, sysplex_name, "LINUX",
+ LINUX_VERSION_CODE);
}
-static void
-cpi_callback(struct sclp_req *req, void *data)
-{
- struct semaphore *sem;
-
- sem = (struct semaphore *) data;
- up(sem);
-}
-
-static struct sclp_req *
-cpi_prepare_req(void)
-{
- struct sclp_req *req;
- struct cpi_sccb *sccb;
- struct cpi_evbuf *evb;
-
- req = kmalloc(sizeof(struct sclp_req), GFP_KERNEL);
- if (req == NULL)
- return ERR_PTR(-ENOMEM);
- sccb = (struct cpi_sccb *) __get_free_page(GFP_KERNEL | GFP_DMA);
- if (sccb == NULL) {
- kfree(req);
- return ERR_PTR(-ENOMEM);
- }
- memset(sccb, 0, sizeof(struct cpi_sccb));
-
- /* setup SCCB for Control-Program Identification */
- sccb->header.length = sizeof(struct cpi_sccb);
- sccb->cpi_evbuf.header.length = sizeof(struct cpi_evbuf);
- sccb->cpi_evbuf.header.type = 0x0B;
- evb = &sccb->cpi_evbuf;
-
- /* set system type */
- memset(evb->system_type, ' ', CPI_LENGTH_SYSTEM_TYPE);
- memcpy(evb->system_type, system_type, strlen(system_type));
- sclp_ascebc_str(evb->system_type, CPI_LENGTH_SYSTEM_TYPE);
- EBC_TOUPPER(evb->system_type, CPI_LENGTH_SYSTEM_TYPE);
-
- /* set system name */
- memset(evb->system_name, ' ', CPI_LENGTH_SYSTEM_NAME);
- memcpy(evb->system_name, system_name, strlen(system_name));
- sclp_ascebc_str(evb->system_name, CPI_LENGTH_SYSTEM_NAME);
- EBC_TOUPPER(evb->system_name, CPI_LENGTH_SYSTEM_NAME);
-
- /* set sytem level */
- evb->system_level = LINUX_VERSION_CODE;
-
- /* set sysplex name */
- if (sysplex_name) {
- memset(evb->sysplex_name, ' ', CPI_LENGTH_SYSPLEX_NAME);
- memcpy(evb->sysplex_name, sysplex_name, strlen(sysplex_name));
- sclp_ascebc_str(evb->sysplex_name, CPI_LENGTH_SYSPLEX_NAME);
- EBC_TOUPPER(evb->sysplex_name, CPI_LENGTH_SYSPLEX_NAME);
- }
-
- /* prepare request data structure presented to SCLP driver */
- req->command = SCLP_CMDW_WRITE_EVENT_DATA;
- req->sccb = sccb;
- req->status = SCLP_REQ_FILLED;
- req->callback = cpi_callback;
- return req;
-}
-
-static void
-cpi_free_req(struct sclp_req *req)
-{
- free_page((unsigned long) req->sccb);
- kfree(req);
-}
-
-static int __init
-cpi_module_init(void)
-{
- struct semaphore sem;
- struct sclp_req *req;
- int rc;
-
- rc = cpi_check_parms();
- if (rc)
- return rc;
-
- rc = sclp_register(&sclp_cpi_event);
- if (rc) {
- /* could not register sclp event. Die. */
- printk(KERN_WARNING "cpi: could not register to hardware "
- "console.\n");
- return -EINVAL;
- }
- if (!(sclp_cpi_event.sclp_send_mask & EVTYP_CTLPROGIDENT_MASK)) {
- printk(KERN_WARNING "cpi: no control program identification "
- "support\n");
- sclp_unregister(&sclp_cpi_event);
- return -EOPNOTSUPP;
- }
-
- req = cpi_prepare_req();
- if (IS_ERR(req)) {
- printk(KERN_WARNING "cpi: couldn't allocate request\n");
- sclp_unregister(&sclp_cpi_event);
- return PTR_ERR(req);
- }
-
- /* Prepare semaphore */
- sema_init(&sem, 0);
- req->callback_data = &sem;
- /* Add request to sclp queue */
- rc = sclp_add_request(req);
- if (rc) {
- printk(KERN_WARNING "cpi: could not start request\n");
- cpi_free_req(req);
- sclp_unregister(&sclp_cpi_event);
- return rc;
- }
- /* make "insmod" sleep until callback arrives */
- down(&sem);
-
- rc = ((struct cpi_sccb *) req->sccb)->header.response_code;
- if (rc != 0x0020) {
- printk(KERN_WARNING "cpi: failed with response code 0x%x\n",
- rc);
- rc = -ECOMM;
- } else
- rc = 0;
-
- cpi_free_req(req);
- sclp_unregister(&sclp_cpi_event);
-
- return rc;
-}
-
-
static void __exit cpi_module_exit(void)
{
}
-
-/* declare driver module init/cleanup functions */
module_init(cpi_module_init);
module_exit(cpi_module_exit);
-
git.openpandora.org / pandora-kernel.git / blobdiff