css.c (f67f129e519fa87f8ebd236b6336fe43f31ee141) css.c (f5daba1d4116d964435ddd99f32b6c80448a496b)
1/*
2 * drivers/s390/cio/css.c
3 * driver for channel subsystem
4 *
5 * Copyright IBM Corp. 2002,2008
6 * Author(s): Arnd Bergmann (arndb@de.ibm.com)
7 * Cornelia Huck (cornelia.huck@de.ibm.com)
8 */

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13#include <linux/module.h>
14#include <linux/init.h>
15#include <linux/device.h>
16#include <linux/slab.h>
17#include <linux/errno.h>
18#include <linux/list.h>
19#include <linux/reboot.h>
20#include <asm/isc.h>
1/*
2 * drivers/s390/cio/css.c
3 * driver for channel subsystem
4 *
5 * Copyright IBM Corp. 2002,2008
6 * Author(s): Arnd Bergmann (arndb@de.ibm.com)
7 * Cornelia Huck (cornelia.huck@de.ibm.com)
8 */

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13#include <linux/module.h>
14#include <linux/init.h>
15#include <linux/device.h>
16#include <linux/slab.h>
17#include <linux/errno.h>
18#include <linux/list.h>
19#include <linux/reboot.h>
20#include <asm/isc.h>
21#include <asm/crw.h>
21
22
22#include "../s390mach.h"
23#include "css.h"
24#include "cio.h"
25#include "cio_debug.h"
26#include "ioasm.h"
27#include "chsc.h"
28#include "device.h"
29#include "idset.h"
30#include "chp.h"

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267 * We don't want to generate uevents for I/O subchannels that don't
268 * have a working ccw device behind them since they will be
269 * unregistered before they can be used anyway, so we delay the add
270 * uevent until after device recognition was successful.
271 * Note that we suppress the uevent for all subchannel types;
272 * the subchannel driver can decide itself when it wants to inform
273 * userspace of its existence.
274 */
23#include "css.h"
24#include "cio.h"
25#include "cio_debug.h"
26#include "ioasm.h"
27#include "chsc.h"
28#include "device.h"
29#include "idset.h"
30#include "chp.h"

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267 * We don't want to generate uevents for I/O subchannels that don't
268 * have a working ccw device behind them since they will be
269 * unregistered before they can be used anyway, so we delay the add
270 * uevent until after device recognition was successful.
271 * Note that we suppress the uevent for all subchannel types;
272 * the subchannel driver can decide itself when it wants to inform
273 * userspace of its existence.
274 */
275 dev_set_uevent_suppress(&sch->dev, 1);
275 sch->dev.uevent_suppress = 1;
276 css_update_ssd_info(sch);
277 /* make it known to the system */
278 ret = css_sch_device_register(sch);
279 if (ret) {
280 CIO_MSG_EVENT(0, "Could not register sch 0.%x.%04x: %d\n",
281 sch->schid.ssid, sch->schid.sch_no, ret);
282 return ret;
283 }
284 if (!sch->driver) {
285 /*
286 * No driver matched. Generate the uevent now so that
287 * a fitting driver module may be loaded based on the
288 * modalias.
289 */
276 css_update_ssd_info(sch);
277 /* make it known to the system */
278 ret = css_sch_device_register(sch);
279 if (ret) {
280 CIO_MSG_EVENT(0, "Could not register sch 0.%x.%04x: %d\n",
281 sch->schid.ssid, sch->schid.sch_no, ret);
282 return ret;
283 }
284 if (!sch->driver) {
285 /*
286 * No driver matched. Generate the uevent now so that
287 * a fitting driver module may be loaded based on the
288 * modalias.
289 */
290 dev_set_uevent_suppress(&sch->dev, 0);
290 sch->dev.uevent_suppress = 0;
291 kobject_uevent(&sch->dev.kobj, KOBJ_ADD);
292 }
293 return ret;
294}
295
296int css_probe_device(struct subchannel_id schid)
297{
298 int ret;

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760 ret = chsc_alloc_sei_area();
761 if (ret)
762 goto out;
763
764 ret = slow_subchannel_init();
765 if (ret)
766 goto out;
767
291 kobject_uevent(&sch->dev.kobj, KOBJ_ADD);
292 }
293 return ret;
294}
295
296int css_probe_device(struct subchannel_id schid)
297{
298 int ret;

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760 ret = chsc_alloc_sei_area();
761 if (ret)
762 goto out;
763
764 ret = slow_subchannel_init();
765 if (ret)
766 goto out;
767
768 ret = s390_register_crw_handler(CRW_RSC_SCH, css_process_crw);
768 ret = crw_register_handler(CRW_RSC_SCH, css_process_crw);
769 if (ret)
770 goto out;
771
772 if ((ret = bus_register(&css_bus_type)))
773 goto out;
774
775 /* Try to enable MSS. */
776 ret = chsc_enable_facility(CHSC_SDA_OC_MSS);

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840 if (css_chsc_characteristics.secm)
841 device_remove_file(&css->device,
842 &dev_attr_cm_enable);
843 device_unregister(&css->device);
844 }
845out_bus:
846 bus_unregister(&css_bus_type);
847out:
769 if (ret)
770 goto out;
771
772 if ((ret = bus_register(&css_bus_type)))
773 goto out;
774
775 /* Try to enable MSS. */
776 ret = chsc_enable_facility(CHSC_SDA_OC_MSS);

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840 if (css_chsc_characteristics.secm)
841 device_remove_file(&css->device,
842 &dev_attr_cm_enable);
843 device_unregister(&css->device);
844 }
845out_bus:
846 bus_unregister(&css_bus_type);
847out:
848 s390_unregister_crw_handler(CRW_RSC_CSS);
848 crw_unregister_handler(CRW_RSC_CSS);
849 chsc_free_sei_area();
850 kfree(slow_subchannel_set);
851 pr_alert("The CSS device driver initialization failed with "
852 "errno=%d\n", ret);
853 return ret;
854}
855
856int sch_is_pseudo_sch(struct subchannel *sch)

--- 104 unchanged lines hidden --- 		849 chsc_free_sei_area();
850 kfree(slow_subchannel_set);
851 pr_alert("The CSS device driver initialization failed with "
852 "errno=%d\n", ret);
853 return ret;
854}
855
856int sch_is_pseudo_sch(struct subchannel *sch)

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