Merge branch 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6

* 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6: (38 commits)
  [S390] SPIN_LOCK_UNLOCKED cleanup in drivers/s390
  [S390] Clean up smp code in preparation for some larger changes.
  [S390] Remove debugging junk.
  [S390] Switch etr from tasklet to workqueue.
  [S390] split page_test_and_clear_dirty.
  [S390] Processor degradation notification.
  [S390] vtime: cleanup per_cpu usage.
  [S390] crypto: cleanup.
  [S390] sclp: fix coding style.
  [S390] vmlogrdr: stop IUCV connection in vmlogrdr_release.
  [S390] sclp: initialize early.
  [S390] ctc: kmalloc->kzalloc/casting cleanups.
  [S390] zfcpdump support.
  [S390] dasd: Add ipldev parameter.
  [S390] dasd: Add sysfs attribute status and generate uevents.
  [S390] Improved kernel stack overflow checking.
  [S390] Get rid of console setup functions.
  [S390] No execute support cleanup.
  [S390] Minor fault path optimization.
  [S390] Use generic bug.
  ...

37 files changed, 2781 insertions, 1197 deletions

diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c
index eb5dc62f0d9c..e71929db8b06 100644
--- a/drivers/s390/block/dasd.c
+++ b/drivers/s390/block/dasd.c
@@ -398,6 +398,9 @@ dasd_change_state(struct dasd_device *device)
 
 	if (device->state == device->target)
 		wake_up(&dasd_init_waitq);
+
+	/* let user-space know that the device status changed */
+	kobject_uevent(&device->cdev->dev.kobj, KOBJ_CHANGE);
 }
 
 /*
diff --git a/drivers/s390/block/dasd_devmap.c b/drivers/s390/block/dasd_devmap.c
index ed70852cc915..6a89cefe99bb 100644
--- a/drivers/s390/block/dasd_devmap.c
+++ b/drivers/s390/block/dasd_devmap.c
@@ -19,6 +19,7 @@
 
 #include <asm/debug.h>
 #include <asm/uaccess.h>
+#include <asm/ipl.h>
 
 /* This is ugly... */
 #define PRINTK_HEADER "dasd_devmap:"
@@ -133,6 +134,8 @@ dasd_call_setup(char *str)
 __setup ("dasd=", dasd_call_setup);
 #endif	/* #ifndef MODULE */
 
+#define	DASD_IPLDEV	"ipldev"
+
 /*
  * Read a device busid/devno from a string.
  */
@@ -141,6 +144,20 @@ dasd_busid(char **str, int *id0, int *id1, int *devno)
 {
 	int val, old_style;
 
+	/* Interpret ipldev busid */
+	if (strncmp(DASD_IPLDEV, *str, strlen(DASD_IPLDEV)) == 0) {
+		if (ipl_info.type != IPL_TYPE_CCW) {
+			MESSAGE(KERN_ERR, "%s", "ipl device is not a ccw "
+				"device");
+			return -EINVAL;
+		}
+		*id0 = 0;
+		*id1 = ipl_info.data.ccw.dev_id.ssid;
+		*devno = ipl_info.data.ccw.dev_id.devno;
+		*str += strlen(DASD_IPLDEV);
+
+		return 0;
+	}
 	/* check for leading '0x' */
 	old_style = 0;
 	if ((*str)[0] == '0' && (*str)[1] == 'x') {
@@ -829,6 +846,46 @@ dasd_discipline_show(struct device *dev, struct device_attribute *attr,
 static DEVICE_ATTR(discipline, 0444, dasd_discipline_show, NULL);
 
 static ssize_t
+dasd_device_status_show(struct device *dev, struct device_attribute *attr,
+		     char *buf)
+{
+	struct dasd_device *device;
+	ssize_t len;
+
+	device = dasd_device_from_cdev(to_ccwdev(dev));
+	if (!IS_ERR(device)) {
+		switch (device->state) {
+		case DASD_STATE_NEW:
+			len = snprintf(buf, PAGE_SIZE, "new\n");
+			break;
+		case DASD_STATE_KNOWN:
+			len = snprintf(buf, PAGE_SIZE, "detected\n");
+			break;
+		case DASD_STATE_BASIC:
+			len = snprintf(buf, PAGE_SIZE, "basic\n");
+			break;
+		case DASD_STATE_UNFMT:
+			len = snprintf(buf, PAGE_SIZE, "unformatted\n");
+			break;
+		case DASD_STATE_READY:
+			len = snprintf(buf, PAGE_SIZE, "ready\n");
+			break;
+		case DASD_STATE_ONLINE:
+			len = snprintf(buf, PAGE_SIZE, "online\n");
+			break;
+		default:
+			len = snprintf(buf, PAGE_SIZE, "no stat\n");
+			break;
+		}
+		dasd_put_device(device);
+	} else
+		len = snprintf(buf, PAGE_SIZE, "unknown\n");
+	return len;
+}
+
+static DEVICE_ATTR(status, 0444, dasd_device_status_show, NULL);
+
+static ssize_t
 dasd_alias_show(struct device *dev, struct device_attribute *attr, char *buf)
 {
 	struct dasd_devmap *devmap;
@@ -939,6 +996,7 @@ static DEVICE_ATTR(eer_enabled, 0644, dasd_eer_show, dasd_eer_store);
 static struct attribute * dasd_attrs[] = {
 	&dev_attr_readonly.attr,
 	&dev_attr_discipline.attr,
+	&dev_attr_status.attr,
 	&dev_attr_alias.attr,
 	&dev_attr_vendor.attr,
 	&dev_attr_uid.attr,
diff --git a/drivers/s390/char/Makefile b/drivers/s390/char/Makefile
index 293e667b50f2..c210784bdf46 100644
--- a/drivers/s390/char/Makefile
+++ b/drivers/s390/char/Makefile
@@ -3,7 +3,7 @@
 #
 
 obj-y += ctrlchar.o keyboard.o defkeymap.o sclp.o sclp_rw.o sclp_quiesce.o \
-	 sclp_info.o
+	 sclp_info.o sclp_config.o sclp_chp.o
 
 obj-$(CONFIG_TN3270) += raw3270.o
 obj-$(CONFIG_TN3270_CONSOLE) += con3270.o
@@ -29,3 +29,6 @@ obj-$(CONFIG_S390_TAPE_34XX) += tape_34xx.o
 obj-$(CONFIG_S390_TAPE_3590) += tape_3590.o
 obj-$(CONFIG_MONREADER) += monreader.o
 obj-$(CONFIG_MONWRITER) += monwriter.o
+
+zcore_mod-objs := sclp_sdias.o zcore.o
+obj-$(CONFIG_ZFCPDUMP) += zcore_mod.o
diff --git a/drivers/s390/char/con3215.c b/drivers/s390/char/con3215.c
index 9a328f14a641..6000bdee4082 100644
--- a/drivers/s390/char/con3215.c
+++ b/drivers/s390/char/con3215.c
@@ -813,12 +813,6 @@ con3215_unblank(void)
 	spin_unlock_irqrestore(get_ccwdev_lock(raw->cdev), flags);
 }
 
-static int __init 
-con3215_consetup(struct console *co, char *options)
-{
-	return 0;
-}
-
 /*
  *  The console structure for the 3215 console
  */
@@ -827,7 +821,6 @@ static struct console con3215 = {
 	.write	 = con3215_write,
 	.device	 = con3215_device,
 	.unblank = con3215_unblank,
-	.setup	 = con3215_consetup,
 	.flags	 = CON_PRINTBUFFER,
 };
 
diff --git a/drivers/s390/char/con3270.c b/drivers/s390/char/con3270.c
index 8e7f2d7633d6..fd3479119eb4 100644
--- a/drivers/s390/char/con3270.c
+++ b/drivers/s390/char/con3270.c
@@ -555,12 +555,6 @@ con3270_unblank(void)
 	spin_unlock_irqrestore(&cp->view.lock, flags);
 }
 
-static int __init 
-con3270_consetup(struct console *co, char *options)
-{
-	return 0;
-}
-
 /*
  *  The console structure for the 3270 console
  */
@@ -569,7 +563,6 @@ static struct console con3270 = {
 	.write	 = con3270_write,
 	.device	 = con3270_device,
 	.unblank = con3270_unblank,
-	.setup	 = con3270_consetup,
 	.flags	 = CON_PRINTBUFFER,
 };
 
diff --git a/drivers/s390/char/sclp.c b/drivers/s390/char/sclp.c
index f171de3b0b11..fa62e6944057 100644
--- a/drivers/s390/char/sclp.c
+++ b/drivers/s390/char/sclp.c
@@ -15,6 +15,7 @@
 #include <linux/timer.h>
 #include <linux/reboot.h>
 #include <linux/jiffies.h>
+#include <linux/init.h>
 #include <asm/types.h>
 #include <asm/s390_ext.h>
 
@@ -510,7 +511,7 @@ sclp_state_change_cb(struct evbuf_header *evbuf)
 }
 
 static struct sclp_register sclp_state_change_event = {
-	.receive_mask = EvTyp_StateChange_Mask,
+	.receive_mask = EVTYP_STATECHANGE_MASK,
 	.receiver_fn = sclp_state_change_cb
 };
 
@@ -930,3 +931,10 @@ sclp_init(void)
 	sclp_init_mask(1);
 	return 0;
 }
+
+static __init int sclp_initcall(void)
+{
+	return sclp_init();
+}
+
+arch_initcall(sclp_initcall);
diff --git a/drivers/s390/char/sclp.h b/drivers/s390/char/sclp.h
index 7d29ab45a6ed..87ac4a3ad49d 100644
--- a/drivers/s390/char/sclp.h
+++ b/drivers/s390/char/sclp.h
@@ -19,33 +19,37 @@
 #define MAX_KMEM_PAGES (sizeof(unsigned long) << 3)
 #define MAX_CONSOLE_PAGES	4
 
-#define EvTyp_OpCmd		0x01
-#define EvTyp_Msg		0x02
-#define EvTyp_StateChange	0x08
-#define EvTyp_PMsgCmd		0x09
-#define EvTyp_CntlProgOpCmd	0x20
-#define EvTyp_CntlProgIdent	0x0B
-#define EvTyp_SigQuiesce	0x1D
-#define EvTyp_VT220Msg		0x1A
-
-#define EvTyp_OpCmd_Mask	0x80000000
-#define EvTyp_Msg_Mask		0x40000000
-#define EvTyp_StateChange_Mask	0x01000000
-#define EvTyp_PMsgCmd_Mask	0x00800000
-#define EvTyp_CtlProgOpCmd_Mask	0x00000001
-#define EvTyp_CtlProgIdent_Mask	0x00200000
-#define EvTyp_SigQuiesce_Mask	0x00000008
-#define EvTyp_VT220Msg_Mask	0x00000040
-
-#define GnrlMsgFlgs_DOM		0x8000
-#define GnrlMsgFlgs_SndAlrm	0x4000
-#define GnrlMsgFlgs_HoldMsg	0x2000
-
-#define LnTpFlgs_CntlText	0x8000
-#define LnTpFlgs_LabelText	0x4000
-#define LnTpFlgs_DataText	0x2000
-#define LnTpFlgs_EndText	0x1000
-#define LnTpFlgs_PromptText	0x0800
+#define EVTYP_OPCMD		0x01
+#define EVTYP_MSG		0x02
+#define EVTYP_STATECHANGE	0x08
+#define EVTYP_PMSGCMD		0x09
+#define EVTYP_CNTLPROGOPCMD	0x20
+#define EVTYP_CNTLPROGIDENT	0x0B
+#define EVTYP_SIGQUIESCE	0x1D
+#define EVTYP_VT220MSG		0x1A
+#define EVTYP_CONFMGMDATA	0x04
+#define EVTYP_SDIAS		0x1C
+
+#define EVTYP_OPCMD_MASK	0x80000000
+#define EVTYP_MSG_MASK		0x40000000
+#define EVTYP_STATECHANGE_MASK	0x01000000
+#define EVTYP_PMSGCMD_MASK	0x00800000
+#define EVTYP_CTLPROGOPCMD_MASK	0x00000001
+#define EVTYP_CTLPROGIDENT_MASK	0x00200000
+#define EVTYP_SIGQUIESCE_MASK	0x00000008
+#define EVTYP_VT220MSG_MASK	0x00000040
+#define EVTYP_CONFMGMDATA_MASK	0x10000000
+#define EVTYP_SDIAS_MASK	0x00000010
+
+#define GNRLMSGFLGS_DOM		0x8000
+#define GNRLMSGFLGS_SNDALRM	0x4000
+#define GNRLMSGFLGS_HOLDMSG	0x2000
+
+#define LNTPFLGS_CNTLTEXT	0x8000
+#define LNTPFLGS_LABELTEXT	0x4000
+#define LNTPFLGS_DATATEXT	0x2000
+#define LNTPFLGS_ENDTEXT	0x1000
+#define LNTPFLGS_PROMPTTEXT	0x0800
 
 typedef unsigned int sclp_cmdw_t;
 
@@ -56,15 +60,15 @@ typedef unsigned int sclp_cmdw_t;
 #define SCLP_CMDW_READ_SCP_INFO_FORCED	0x00120001
 
 #define GDS_ID_MDSMU		0x1310
-#define GDS_ID_MDSRouteInfo	0x1311
-#define GDS_ID_AgUnWrkCorr	0x1549
-#define GDS_ID_SNACondReport	0x1532
+#define GDS_ID_MDSROUTEINFO	0x1311
+#define GDS_ID_AGUNWRKCORR	0x1549
+#define GDS_ID_SNACONDREPORT	0x1532
 #define GDS_ID_CPMSU		0x1212
-#define GDS_ID_RoutTargInstr	0x154D
-#define GDS_ID_OpReq		0x8070
-#define GDS_ID_TextCmd		0x1320
+#define GDS_ID_ROUTTARGINSTR	0x154D
+#define GDS_ID_OPREQ		0x8070
+#define GDS_ID_TEXTCMD		0x1320
 
-#define GDS_KEY_SelfDefTextMsg	0x31
+#define GDS_KEY_SELFDEFTEXTMSG	0x31
 
 typedef u32 sccb_mask_t;	/* ATTENTION: assumes 32bit mask !!! */
 
diff --git a/drivers/s390/char/sclp_chp.c b/drivers/s390/char/sclp_chp.c
new file mode 100644
index 000000000000..a66b914519b5
--- /dev/null
+++ b/drivers/s390/char/sclp_chp.c
@@ -0,0 +1,196 @@
+/*
+ *  drivers/s390/char/sclp_chp.c
+ *
+ *    Copyright IBM Corp. 2007
+ *    Author(s): Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
+ */
+
+#include <linux/types.h>
+#include <linux/gfp.h>
+#include <linux/errno.h>
+#include <linux/completion.h>
+#include <asm/sclp.h>
+#include <asm/chpid.h>
+
+#include "sclp.h"
+
+#define TAG	"sclp_chp: "
+
+#define SCLP_CMDW_CONFIGURE_CHANNEL_PATH	0x000f0001
+#define SCLP_CMDW_DECONFIGURE_CHANNEL_PATH	0x000e0001
+#define SCLP_CMDW_READ_CHANNEL_PATH_INFORMATION	0x00030001
+
+static inline sclp_cmdw_t get_configure_cmdw(struct chp_id chpid)
+{
+	return SCLP_CMDW_CONFIGURE_CHANNEL_PATH | chpid.id << 8;
+}
+
+static inline sclp_cmdw_t get_deconfigure_cmdw(struct chp_id chpid)
+{
+	return SCLP_CMDW_DECONFIGURE_CHANNEL_PATH | chpid.id << 8;
+}
+
+static void chp_callback(struct sclp_req *req, void *data)
+{
+	struct completion *completion = data;
+
+	complete(completion);
+}
+
+struct chp_cfg_sccb {
+	struct sccb_header header;
+	u8 ccm;
+	u8 reserved[6];
+	u8 cssid;
+} __attribute__((packed));
+
+struct chp_cfg_data {
+	struct chp_cfg_sccb sccb;
+	struct sclp_req req;
+	struct completion completion;
+} __attribute__((packed));
+
+static int do_configure(sclp_cmdw_t cmd)
+{
+	struct chp_cfg_data *data;
+	int rc;
+
+	/* Prepare sccb. */
+	data = (struct chp_cfg_data *) get_zeroed_page(GFP_KERNEL | GFP_DMA);
+	if (!data)
+		return -ENOMEM;
+	data->sccb.header.length = sizeof(struct chp_cfg_sccb);
+	data->req.command = cmd;
+	data->req.sccb = &(data->sccb);
+	data->req.status = SCLP_REQ_FILLED;
+	data->req.callback = chp_callback;
+	data->req.callback_data = &(data->completion);
+	init_completion(&data->completion);
+
+	/* Perform sclp request. */
+	rc = sclp_add_request(&(data->req));
+	if (rc)
+		goto out;
+	wait_for_completion(&data->completion);
+
+	/* Check response .*/
+	if (data->req.status != SCLP_REQ_DONE) {
+		printk(KERN_WARNING TAG "configure channel-path request failed "
+		       "(status=0x%02x)\n", data->req.status);
+		rc = -EIO;
+		goto out;
+	}
+	switch (data->sccb.header.response_code) {
+	case 0x0020:
+	case 0x0120:
+	case 0x0440:
+	case 0x0450:
+		break;
+	default:
+		printk(KERN_WARNING TAG "configure channel-path failed "
+		       "(cmd=0x%08x, response=0x%04x)\n", cmd,
+		       data->sccb.header.response_code);
+		rc = -EIO;
+		break;
+	}
+out:
+	free_page((unsigned long) data);
+
+	return rc;
+}
+
+/**
+ * sclp_chp_configure - perform configure channel-path sclp command
+ * @chpid: channel-path ID
+ *
+ * Perform configure channel-path command sclp command for specified chpid.
+ * Return 0 after command successfully finished, non-zero otherwise.
+ */
+int sclp_chp_configure(struct chp_id chpid)
+{
+	return do_configure(get_configure_cmdw(chpid));
+}
+
+/**
+ * sclp_chp_deconfigure - perform deconfigure channel-path sclp command
+ * @chpid: channel-path ID
+ *
+ * Perform deconfigure channel-path command sclp command for specified chpid
+ * and wait for completion. On success return 0. Return non-zero otherwise.
+ */
+int sclp_chp_deconfigure(struct chp_id chpid)
+{
+	return do_configure(get_deconfigure_cmdw(chpid));
+}
+
+struct chp_info_sccb {
+	struct sccb_header header;
+	u8 recognized[SCLP_CHP_INFO_MASK_SIZE];
+	u8 standby[SCLP_CHP_INFO_MASK_SIZE];
+	u8 configured[SCLP_CHP_INFO_MASK_SIZE];
+	u8 ccm;
+	u8 reserved[6];
+	u8 cssid;
+} __attribute__((packed));
+
+struct chp_info_data {
+	struct chp_info_sccb sccb;
+	struct sclp_req req;
+	struct completion completion;
+} __attribute__((packed));
+
+/**
+ * sclp_chp_read_info - perform read channel-path information sclp command
+ * @info: resulting channel-path information data
+ *
+ * Perform read channel-path information sclp command and wait for completion.
+ * On success, store channel-path information in @info and return 0. Return
+ * non-zero otherwise.
+ */
+int sclp_chp_read_info(struct sclp_chp_info *info)
+{
+	struct chp_info_data *data;
+	int rc;
+
+	/* Prepare sccb. */
+	data = (struct chp_info_data *) get_zeroed_page(GFP_KERNEL | GFP_DMA);
+	if (!data)
+		return -ENOMEM;
+	data->sccb.header.length = sizeof(struct chp_info_sccb);
+	data->req.command = SCLP_CMDW_READ_CHANNEL_PATH_INFORMATION;
+	data->req.sccb = &(data->sccb);
+	data->req.status = SCLP_REQ_FILLED;
+	data->req.callback = chp_callback;
+	data->req.callback_data = &(data->completion);
+	init_completion(&data->completion);
+
+	/* Perform sclp request. */
+	rc = sclp_add_request(&(data->req));
+	if (rc)
+		goto out;
+	wait_for_completion(&data->completion);
+
+	/* Check response .*/
+	if (data->req.status != SCLP_REQ_DONE) {
+		printk(KERN_WARNING TAG "read channel-path info request failed "
+		       "(status=0x%02x)\n", data->req.status);
+		rc = -EIO;
+		goto out;
+	}
+	if (data->sccb.header.response_code != 0x0010) {
+		printk(KERN_WARNING TAG "read channel-path info failed "
+		       "(response=0x%04x)\n", data->sccb.header.response_code);
+		rc = -EIO;
+		goto out;
+	}
+	memcpy(info->recognized, data->sccb.recognized,
+	       SCLP_CHP_INFO_MASK_SIZE);
+	memcpy(info->standby, data->sccb.standby,
+	       SCLP_CHP_INFO_MASK_SIZE);
+	memcpy(info->configured, data->sccb.configured,
+	       SCLP_CHP_INFO_MASK_SIZE);
+out:
+	free_page((unsigned long) data);
+
+	return rc;
+}
diff --git a/drivers/s390/char/sclp_config.c b/drivers/s390/char/sclp_config.c
new file mode 100644
index 000000000000..5322e5e54a98
--- /dev/null
+++ b/drivers/s390/char/sclp_config.c
@@ -0,0 +1,75 @@
+/*
+ *  drivers/s390/char/sclp_config.c
+ *
+ *    Copyright IBM Corp. 2007
+ *    Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>
+ */
+
+#include <linux/init.h>
+#include <linux/errno.h>
+#include <linux/cpu.h>
+#include <linux/sysdev.h>
+#include <linux/workqueue.h>
+#include "sclp.h"
+
+#define TAG	"sclp_config: "
+
+struct conf_mgm_data {
+	u8 reserved;
+	u8 ev_qualifier;
+} __attribute__((packed));
+
+#define EV_QUAL_CAP_CHANGE	3
+
+static struct work_struct sclp_cpu_capability_work;
+
+static void sclp_cpu_capability_notify(struct work_struct *work)
+{
+	int cpu;
+	struct sys_device *sysdev;
+
+	printk(KERN_WARNING TAG "cpu capability changed.\n");
+	lock_cpu_hotplug();
+	for_each_online_cpu(cpu) {
+		sysdev = get_cpu_sysdev(cpu);
+		kobject_uevent(&sysdev->kobj, KOBJ_CHANGE);
+	}
+	unlock_cpu_hotplug();
+}
+
+static void sclp_conf_receiver_fn(struct evbuf_header *evbuf)
+{
+	struct conf_mgm_data *cdata;
+
+	cdata = (struct conf_mgm_data *)(evbuf + 1);
+	if (cdata->ev_qualifier == EV_QUAL_CAP_CHANGE)
+		schedule_work(&sclp_cpu_capability_work);
+}
+
+static struct sclp_register sclp_conf_register =
+{
+	.receive_mask = EVTYP_CONFMGMDATA_MASK,
+	.receiver_fn  = sclp_conf_receiver_fn,
+};
+
+static int __init sclp_conf_init(void)
+{
+	int rc;
+
+	INIT_WORK(&sclp_cpu_capability_work, sclp_cpu_capability_notify);
+
+	rc = sclp_register(&sclp_conf_register);
+	if (rc) {
+		printk(KERN_ERR TAG "failed to register (%d).\n", rc);
+		return rc;
+	}
+
+	if (!(sclp_conf_register.sclp_receive_mask & EVTYP_CONFMGMDATA_MASK)) {
+		printk(KERN_WARNING TAG "no configuration management.\n");
+		sclp_unregister(&sclp_conf_register);
+		rc = -ENOSYS;
+	}
+	return rc;
+}
+
+__initcall(sclp_conf_init);
diff --git a/drivers/s390/char/sclp_cpi.c b/drivers/s390/char/sclp_cpi.c
index 65aa2c85737f..29fe2a5ec2fe 100644
--- a/drivers/s390/char/sclp_cpi.c
+++ b/drivers/s390/char/sclp_cpi.c
@@ -46,7 +46,7 @@ struct cpi_sccb {
 /* Event type structure for write message and write priority message */
 static struct sclp_register sclp_cpi_event =
 {
-	.send_mask = EvTyp_CtlProgIdent_Mask
+	.send_mask = EVTYP_CTLPROGIDENT_MASK
 };
 
 MODULE_LICENSE("GPL");
@@ -201,7 +201,7 @@ cpi_module_init(void)
 		       "console.\n");
 		return -EINVAL;
 	}
-	if (!(sclp_cpi_event.sclp_send_mask & EvTyp_CtlProgIdent_Mask)) {
+	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);
diff --git a/drivers/s390/char/sclp_quiesce.c b/drivers/s390/char/sclp_quiesce.c
index baa8fe669ed2..45ff25e787cb 100644
--- a/drivers/s390/char/sclp_quiesce.c
+++ b/drivers/s390/char/sclp_quiesce.c
@@ -43,7 +43,7 @@ sclp_quiesce_handler(struct evbuf_header *evbuf)
 }
 
 static struct sclp_register sclp_quiesce_event = {
-	.receive_mask = EvTyp_SigQuiesce_Mask,
+	.receive_mask = EVTYP_SIGQUIESCE_MASK,
 	.receiver_fn = sclp_quiesce_handler
 };
 
diff --git a/drivers/s390/char/sclp_rw.c b/drivers/s390/char/sclp_rw.c
index 2486783ea58e..bbd5b8b66f42 100644
--- a/drivers/s390/char/sclp_rw.c
+++ b/drivers/s390/char/sclp_rw.c
@@ -30,7 +30,7 @@
 
 /* Event type structure for write message and write priority message */
 static struct sclp_register sclp_rw_event = {
-	.send_mask = EvTyp_Msg_Mask | EvTyp_PMsgCmd_Mask
+	.send_mask = EVTYP_MSG_MASK | EVTYP_PMSGCMD_MASK
 };
 
 /*
@@ -64,7 +64,7 @@ sclp_make_buffer(void *page, unsigned short columns, unsigned short htab)
 	memset(sccb, 0, sizeof(struct write_sccb));
 	sccb->header.length = sizeof(struct write_sccb);
 	sccb->msg_buf.header.length = sizeof(struct msg_buf);
-	sccb->msg_buf.header.type = EvTyp_Msg;
+	sccb->msg_buf.header.type = EVTYP_MSG;
 	sccb->msg_buf.mdb.header.length = sizeof(struct mdb);
 	sccb->msg_buf.mdb.header.type = 1;
 	sccb->msg_buf.mdb.header.tag = 0xD4C4C240;	/* ebcdic "MDB " */
@@ -114,7 +114,7 @@ sclp_initialize_mto(struct sclp_buffer *buffer, int max_len)
 	memset(mto, 0, sizeof(struct mto));
 	mto->length = sizeof(struct mto);
 	mto->type = 4;	/* message text object */
-	mto->line_type_flags = LnTpFlgs_EndText; /* end text */
+	mto->line_type_flags = LNTPFLGS_ENDTEXT; /* end text */
 
 	/* set pointer to first byte after struct mto. */
 	buffer->current_line = (char *) (mto + 1);
@@ -215,7 +215,7 @@ sclp_write(struct sclp_buffer *buffer, const unsigned char *msg, int count)
 		case '\a':	/* bell, one for several times	*/
 			/* set SCLP sound alarm bit in General Object */
 			buffer->sccb->msg_buf.mdb.go.general_msg_flags |=
-				GnrlMsgFlgs_SndAlrm;
+				GNRLMSGFLGS_SNDALRM;
 			break;
 		case '\t':	/* horizontal tabulator	 */
 			/* check if new mto needs to be created */
@@ -452,12 +452,12 @@ sclp_emit_buffer(struct sclp_buffer *buffer,
 		return -EIO;
 
 	sccb = buffer->sccb;
-	if (sclp_rw_event.sclp_send_mask & EvTyp_Msg_Mask)
+	if (sclp_rw_event.sclp_send_mask & EVTYP_MSG_MASK)
 		/* Use normal write message */
-		sccb->msg_buf.header.type = EvTyp_Msg;
-	else if (sclp_rw_event.sclp_send_mask & EvTyp_PMsgCmd_Mask)
+		sccb->msg_buf.header.type = EVTYP_MSG;
+	else if (sclp_rw_event.sclp_send_mask & EVTYP_PMSGCMD_MASK)
 		/* Use write priority message */
-		sccb->msg_buf.header.type = EvTyp_PMsgCmd;
+		sccb->msg_buf.header.type = EVTYP_PMSGCMD;
 	else
 		return -ENOSYS;
 	buffer->request.command = SCLP_CMDW_WRITE_EVENT_DATA;
diff --git a/drivers/s390/char/sclp_sdias.c b/drivers/s390/char/sclp_sdias.c
new file mode 100644
index 000000000000..52283daddaef
--- /dev/null
+++ b/drivers/s390/char/sclp_sdias.c
@@ -0,0 +1,255 @@
+/*
+ * Sclp "store data in absolut storage"
+ *
+ * Copyright IBM Corp. 2003,2007
+ * Author(s): Michael Holzheu
+ */
+
+#include <linux/sched.h>
+#include <asm/sclp.h>
+#include <asm/debug.h>
+#include <asm/ipl.h>
+#include "sclp.h"
+#include "sclp_rw.h"
+
+#define TRACE(x...) debug_sprintf_event(sdias_dbf, 1, x)
+#define ERROR_MSG(x...) printk ( KERN_ALERT "SDIAS: " x )
+
+#define SDIAS_RETRIES 300
+#define SDIAS_SLEEP_TICKS 50
+
+#define EQ_STORE_DATA	0x0
+#define EQ_SIZE		0x1
+#define DI_FCP_DUMP	0x0
+#define ASA_SIZE_32	0x0
+#define ASA_SIZE_64	0x1
+#define EVSTATE_ALL_STORED	0x0
+#define EVSTATE_NO_DATA		0x3
+#define EVSTATE_PART_STORED	0x10
+
+static struct debug_info *sdias_dbf;
+
+static struct sclp_register sclp_sdias_register = {
+	.send_mask = EVTYP_SDIAS_MASK,
+};
+
+struct sdias_evbuf {
+	struct	evbuf_header hdr;
+	u8	event_qual;
+	u8	data_id;
+	u64	reserved2;
+	u32	event_id;
+	u16	reserved3;
+	u8	asa_size;
+	u8	event_status;
+	u32	reserved4;
+	u32	blk_cnt;
+	u64	asa;
+	u32	reserved5;
+	u32	fbn;
+	u32	reserved6;
+	u32	lbn;
+	u16	reserved7;
+	u16	dbs;
+} __attribute__((packed));
+
+struct sdias_sccb {
+	struct sccb_header  hdr;
+	struct sdias_evbuf  evbuf;
+} __attribute__((packed));
+
+static struct sdias_sccb sccb __attribute__((aligned(4096)));
+
+static int sclp_req_done;
+static wait_queue_head_t sdias_wq;
+static DEFINE_MUTEX(sdias_mutex);
+
+static void sdias_callback(struct sclp_req *request, void *data)
+{
+	struct sdias_sccb *sccb;
+
+	sccb = (struct sdias_sccb *) request->sccb;
+	sclp_req_done = 1;
+	wake_up(&sdias_wq); /* Inform caller, that request is complete */
+	TRACE("callback done\n");
+}
+
+static int sdias_sclp_send(struct sclp_req *req)
+{
+	int retries;
+	int rc;
+
+	for (retries = SDIAS_RETRIES; retries; retries--) {
+		sclp_req_done = 0;
+		TRACE("add request\n");
+		rc = sclp_add_request(req);
+		if (rc) {
+			/* not initiated, wait some time and retry */
+			set_current_state(TASK_INTERRUPTIBLE);
+			TRACE("add request failed: rc = %i\n",rc);
+			schedule_timeout(SDIAS_SLEEP_TICKS);
+			continue;
+		}
+		/* initiated, wait for completion of service call */
+		wait_event(sdias_wq, (sclp_req_done == 1));
+		if (req->status == SCLP_REQ_FAILED) {
+			TRACE("sclp request failed\n");
+			rc = -EIO;
+			continue;
+		}
+		TRACE("request done\n");
+		break;
+	}
+	return rc;
+}
+
+/*
+ * Get number of blocks (4K) available in the HSA
+ */
+int sclp_sdias_blk_count(void)
+{
+	struct sclp_req request;
+	int rc;
+
+	mutex_lock(&sdias_mutex);
+
+	memset(&sccb, 0, sizeof(sccb));
+	memset(&request, 0, sizeof(request));
+
+	sccb.hdr.length = sizeof(sccb);
+	sccb.evbuf.hdr.length = sizeof(struct sdias_evbuf);
+	sccb.evbuf.hdr.type = EVTYP_SDIAS;
+	sccb.evbuf.event_qual = EQ_SIZE;
+	sccb.evbuf.data_id = DI_FCP_DUMP;
+	sccb.evbuf.event_id = 4712;
+	sccb.evbuf.dbs = 1;
+
+	request.sccb = &sccb;
+	request.command = SCLP_CMDW_WRITE_EVENT_DATA;
+	request.status = SCLP_REQ_FILLED;
+	request.callback = sdias_callback;
+
+	rc = sdias_sclp_send(&request);
+	if (rc) {
+		ERROR_MSG("sclp_send failed for get_nr_blocks\n");
+		goto out;
+	}
+	if (sccb.hdr.response_code != 0x0020) {
+		TRACE("send failed: %x\n", sccb.hdr.response_code);
+		rc = -EIO;
+		goto out;
+	}
+
+	switch (sccb.evbuf.event_status) {
+		case 0:
+			rc = sccb.evbuf.blk_cnt;
+			break;
+		default:
+			ERROR_MSG("SCLP error: %x\n", sccb.evbuf.event_status);
+			rc = -EIO;
+			goto out;
+	}
+	TRACE("%i blocks\n", rc);
+out:
+	mutex_unlock(&sdias_mutex);
+	return rc;
+}
+
+/*
+ * Copy from HSA to absolute storage (not reentrant):
+ *
+ * @dest     : Address of buffer where data should be copied
+ * @start_blk: Start Block (beginning with 1)
+ * @nr_blks  : Number of 4K blocks to copy
+ *
+ * Return Value: 0 : Requested 'number' of blocks of data copied
+ *		 <0: ERROR - negative event status
+ */
+int sclp_sdias_copy(void *dest, int start_blk, int nr_blks)
+{
+	struct sclp_req request;
+	int rc;
+
+	mutex_lock(&sdias_mutex);
+
+	memset(&sccb, 0, sizeof(sccb));
+	memset(&request, 0, sizeof(request));
+
+	sccb.hdr.length = sizeof(sccb);
+	sccb.evbuf.hdr.length = sizeof(struct sdias_evbuf);
+	sccb.evbuf.hdr.type = EVTYP_SDIAS;
+	sccb.evbuf.hdr.flags = 0;
+	sccb.evbuf.event_qual = EQ_STORE_DATA;
+	sccb.evbuf.data_id = DI_FCP_DUMP;
+	sccb.evbuf.event_id = 4712;
+#ifdef __s390x__
+	sccb.evbuf.asa_size = ASA_SIZE_64;
+#else
+	sccb.evbuf.asa_size = ASA_SIZE_32;
+#endif
+	sccb.evbuf.event_status = 0;
+	sccb.evbuf.blk_cnt = nr_blks;
+	sccb.evbuf.asa = (unsigned long)dest;
+	sccb.evbuf.fbn = start_blk;
+	sccb.evbuf.lbn = 0;
+	sccb.evbuf.dbs = 1;
+
+	request.sccb	 = &sccb;
+	request.command  = SCLP_CMDW_WRITE_EVENT_DATA;
+	request.status	 = SCLP_REQ_FILLED;
+	request.callback = sdias_callback;
+
+	rc = sdias_sclp_send(&request);
+	if (rc) {
+		ERROR_MSG("sclp_send failed: %x\n", rc);
+		goto out;
+	}
+	if (sccb.hdr.response_code != 0x0020) {
+		TRACE("copy failed: %x\n", sccb.hdr.response_code);
+		rc = -EIO;
+		goto out;
+	}
+
+	switch (sccb.evbuf.event_status) {
+		case EVSTATE_ALL_STORED:
+			TRACE("all stored\n");
+		case EVSTATE_PART_STORED:
+			TRACE("part stored: %i\n", sccb.evbuf.blk_cnt);
+			break;
+		case EVSTATE_NO_DATA:
+			TRACE("no data\n");
+		default:
+			ERROR_MSG("Error from SCLP while copying hsa. "
+				  "Event status = %x\n",
+				sccb.evbuf.event_status);
+			rc = -EIO;
+	}
+out:
+	mutex_unlock(&sdias_mutex);
+	return rc;
+}
+
+int __init sdias_init(void)
+{
+	int rc;
+
+	if (ipl_info.type != IPL_TYPE_FCP_DUMP)
+		return 0;
+	sdias_dbf = debug_register("dump_sdias", 4, 1, 4 * sizeof(long));
+	debug_register_view(sdias_dbf, &debug_sprintf_view);
+	debug_set_level(sdias_dbf, 6);
+	rc = sclp_register(&sclp_sdias_register);
+	if (rc) {
+		ERROR_MSG("sclp register failed\n");
+		return rc;
+	}
+	init_waitqueue_head(&sdias_wq);
+	TRACE("init done\n");
+	return 0;
+}
+
+void __exit sdias_exit(void)
+{
+	debug_unregister(sdias_dbf);
+	sclp_unregister(&sclp_sdias_register);
+}
diff --git a/drivers/s390/char/sclp_tty.c b/drivers/s390/char/sclp_tty.c
index 076816b9d528..e3b3d390b4a3 100644
--- a/drivers/s390/char/sclp_tty.c
+++ b/drivers/s390/char/sclp_tty.c
@@ -648,7 +648,7 @@ sclp_eval_textcmd(struct gds_subvector *start,
 	subvec = start;
 	while (subvec < end) {
 		subvec = find_gds_subvector(subvec, end,
-					    GDS_KEY_SelfDefTextMsg);
+					    GDS_KEY_SELFDEFTEXTMSG);
 		if (!subvec)
 			break;
 		sclp_eval_selfdeftextmsg((struct gds_subvector *)(subvec + 1),
@@ -664,7 +664,7 @@ sclp_eval_cpmsu(struct gds_vector *start, struct gds_vector *end)
 
 	vec = start;
 	while (vec < end) {
-		vec = find_gds_vector(vec, end, GDS_ID_TextCmd);
+		vec = find_gds_vector(vec, end, GDS_ID_TEXTCMD);
 		if (!vec)
 			break;
 		sclp_eval_textcmd((struct gds_subvector *)(vec + 1),
@@ -703,7 +703,7 @@ sclp_tty_state_change(struct sclp_register *reg)
 
 static struct sclp_register sclp_input_event =
 {
-	.receive_mask = EvTyp_OpCmd_Mask | EvTyp_PMsgCmd_Mask,
+	.receive_mask = EVTYP_OPCMD_MASK | EVTYP_PMSGCMD_MASK,
 	.state_change_fn = sclp_tty_state_change,
 	.receiver_fn = sclp_tty_receiver
 };
diff --git a/drivers/s390/char/sclp_vt220.c b/drivers/s390/char/sclp_vt220.c
index f77dc33b5f8d..726334757bbf 100644
--- a/drivers/s390/char/sclp_vt220.c
+++ b/drivers/s390/char/sclp_vt220.c
@@ -99,8 +99,8 @@ static void sclp_vt220_emit_current(void);
 
 /* Registration structure for our interest in SCLP event buffers */
 static struct sclp_register sclp_vt220_register = {
-	.send_mask		= EvTyp_VT220Msg_Mask,
-	.receive_mask		= EvTyp_VT220Msg_Mask,
+	.send_mask		= EVTYP_VT220MSG_MASK,
+	.receive_mask		= EVTYP_VT220MSG_MASK,
 	.state_change_fn	= NULL,
 	.receiver_fn		= sclp_vt220_receiver_fn
 };
@@ -202,7 +202,7 @@ sclp_vt220_callback(struct sclp_req *request, void *data)
 static int
 __sclp_vt220_emit(struct sclp_vt220_request *request)
 {
-	if (!(sclp_vt220_register.sclp_send_mask & EvTyp_VT220Msg_Mask)) {
+	if (!(sclp_vt220_register.sclp_send_mask & EVTYP_VT220MSG_MASK)) {
 		request->sclp_req.status = SCLP_REQ_FAILED;
 		return -EIO;
 	}
@@ -284,7 +284,7 @@ sclp_vt220_initialize_page(void *page)
 	sccb->header.length = sizeof(struct sclp_vt220_sccb);
 	sccb->header.function_code = SCLP_NORMAL_WRITE;
 	sccb->header.response_code = 0x0000;
-	sccb->evbuf.type = EvTyp_VT220Msg;
+	sccb->evbuf.type = EVTYP_VT220MSG;
 	sccb->evbuf.length = sizeof(struct evbuf_header);
 
 	return request;
diff --git a/drivers/s390/char/vmlogrdr.c b/drivers/s390/char/vmlogrdr.c
index b87d3b019936..a5a00e9ae4d0 100644
--- a/drivers/s390/char/vmlogrdr.c
+++ b/drivers/s390/char/vmlogrdr.c
@@ -125,7 +125,7 @@ static struct vmlogrdr_priv_t sys_ser[] = {
 	  .recording_name = "EREP",
 	  .minor_num      = 0,
 	  .buffer_free    = 1,
-	  .priv_lock      = SPIN_LOCK_UNLOCKED,
+	  .priv_lock	  = __SPIN_LOCK_UNLOCKED(sys_ser[0].priv_lock),
 	  .autorecording  = 1,
 	  .autopurge      = 1,
 	},
@@ -134,7 +134,7 @@ static struct vmlogrdr_priv_t sys_ser[] = {
 	  .recording_name = "ACCOUNT",
 	  .minor_num      = 1,
 	  .buffer_free    = 1,
-	  .priv_lock      = SPIN_LOCK_UNLOCKED,
+	  .priv_lock	  = __SPIN_LOCK_UNLOCKED(sys_ser[1].priv_lock),
 	  .autorecording  = 1,
 	  .autopurge      = 1,
 	},
@@ -143,7 +143,7 @@ static struct vmlogrdr_priv_t sys_ser[] = {
 	  .recording_name = "SYMPTOM",
 	  .minor_num      = 2,
 	  .buffer_free    = 1,
-	  .priv_lock      = SPIN_LOCK_UNLOCKED,
+	  .priv_lock	  = __SPIN_LOCK_UNLOCKED(sys_ser[2].priv_lock),
 	  .autorecording  = 1,
 	  .autopurge      = 1,
 	}
@@ -385,6 +385,9 @@ static int vmlogrdr_release (struct inode *inode, struct file *filp)
 
 	struct vmlogrdr_priv_t * logptr = filp->private_data;
 
+	iucv_path_sever(logptr->path, NULL);
+	kfree(logptr->path);
+	logptr->path = NULL;
 	if (logptr->autorecording) {
 		ret = vmlogrdr_recording(logptr,0,logptr->autopurge);
 		if (ret)
diff --git a/drivers/s390/char/zcore.c b/drivers/s390/char/zcore.c
new file mode 100644
index 000000000000..89d439316a53
--- /dev/null
+++ b/drivers/s390/char/zcore.c
@@ -0,0 +1,651 @@
+/*
+ * zcore module to export memory content and register sets for creating system
+ * dumps on SCSI disks (zfcpdump). The "zcore/mem" debugfs file shows the same
+ * dump format as s390 standalone dumps.
+ *
+ * For more information please refer to Documentation/s390/zfcpdump.txt
+ *
+ * Copyright IBM Corp. 2003,2007
+ * Author(s): Michael Holzheu
+ */
+
+#include <linux/init.h>
+#include <linux/miscdevice.h>
+#include <linux/utsname.h>
+#include <linux/debugfs.h>
+#include <asm/ipl.h>
+#include <asm/sclp.h>
+#include <asm/setup.h>
+#include <asm/sigp.h>
+#include <asm/uaccess.h>
+#include <asm/debug.h>
+#include <asm/processor.h>
+#include <asm/irqflags.h>
+
+#define TRACE(x...) debug_sprintf_event(zcore_dbf, 1, x)
+#define MSG(x...) printk( KERN_ALERT x )
+#define ERROR_MSG(x...) printk ( KERN_ALERT "DUMP: " x )
+
+#define TO_USER		0
+#define TO_KERNEL	1
+
+enum arch_id {
+	ARCH_S390	= 0,
+	ARCH_S390X	= 1,
+};
+
+/* dump system info */
+
+struct sys_info {
+	enum arch_id	arch;
+	unsigned long	sa_base;
+	u32		sa_size;
+	int		cpu_map[NR_CPUS];
+	unsigned long	mem_size;
+	union save_area	lc_mask;
+};
+
+static struct sys_info sys_info;
+static struct debug_info *zcore_dbf;
+static int hsa_available;
+static struct dentry *zcore_dir;
+static struct dentry *zcore_file;
+
+/*
+ * Copy memory from HSA to kernel or user memory (not reentrant):
+ *
+ * @dest:  Kernel or user buffer where memory should be copied to
+ * @src:   Start address within HSA where data should be copied
+ * @count: Size of buffer, which should be copied
+ * @mode:  Either TO_KERNEL or TO_USER
+ */
+static int memcpy_hsa(void *dest, unsigned long src, size_t count, int mode)
+{
+	int offs, blk_num;
+	static char buf[PAGE_SIZE] __attribute__((__aligned__(PAGE_SIZE)));
+
+	if (count == 0)
+		return 0;
+
+	/* copy first block */
+	offs = 0;
+	if ((src % PAGE_SIZE) != 0) {
+		blk_num = src / PAGE_SIZE + 2;
+		if (sclp_sdias_copy(buf, blk_num, 1)) {
+			TRACE("sclp_sdias_copy() failed\n");
+			return -EIO;
+		}
+		offs = min((PAGE_SIZE - (src % PAGE_SIZE)), count);
+		if (mode == TO_USER) {
+			if (copy_to_user((__force __user void*) dest,
+					 buf + (src % PAGE_SIZE), offs))
+				return -EFAULT;
+		} else
+			memcpy(dest, buf + (src % PAGE_SIZE), offs);
+	}
+	if (offs == count)
+		goto out;
+
+	/* copy middle */
+	for (; (offs + PAGE_SIZE) <= count; offs += PAGE_SIZE) {
+		blk_num = (src + offs) / PAGE_SIZE + 2;
+		if (sclp_sdias_copy(buf, blk_num, 1)) {
+			TRACE("sclp_sdias_copy() failed\n");
+			return -EIO;
+		}
+		if (mode == TO_USER) {
+			if (copy_to_user((__force __user void*) dest + offs,
+					 buf, PAGE_SIZE))
+				return -EFAULT;
+		} else
+			memcpy(dest + offs, buf, PAGE_SIZE);
+	}
+	if (offs == count)
+		goto out;
+
+	/* copy last block */
+	blk_num = (src + offs) / PAGE_SIZE + 2;
+	if (sclp_sdias_copy(buf, blk_num, 1)) {
+		TRACE("sclp_sdias_copy() failed\n");
+		return -EIO;
+	}
+	if (mode == TO_USER) {
+		if (copy_to_user((__force __user void*) dest + offs, buf,
+				 PAGE_SIZE))
+			return -EFAULT;
+	} else
+		memcpy(dest + offs, buf, count - offs);
+out:
+	return 0;
+}
+
+static int memcpy_hsa_user(void __user *dest, unsigned long src, size_t count)
+{
+	return memcpy_hsa((void __force *) dest, src, count, TO_USER);
+}
+
+static int memcpy_hsa_kernel(void *dest, unsigned long src, size_t count)
+{
+	return memcpy_hsa(dest, src, count, TO_KERNEL);
+}
+
+static int memcpy_real(void *dest, unsigned long src, size_t count)
+{
+	unsigned long flags;
+	int rc = -EFAULT;
+	register unsigned long _dest asm("2") = (unsigned long) dest;
+	register unsigned long _len1 asm("3") = (unsigned long) count;
+	register unsigned long _src  asm("4") = src;
+	register unsigned long _len2 asm("5") = (unsigned long) count;
+
+	if (count == 0)
+		return 0;
+	flags = __raw_local_irq_stnsm(0xf8); /* switch to real mode */
+	asm volatile (
+		"0:	mvcle	%1,%2,0x0\n"
+		"1:	jo	0b\n"
+		"	lhi	%0,0x0\n"
+		"2:\n"
+		EX_TABLE(1b,2b)
+		: "+d" (rc)
+		: "d" (_dest), "d" (_src), "d" (_len1), "d" (_len2)
+		: "cc", "memory");
+	__raw_local_irq_ssm(flags);
+
+	return rc;
+}
+
+static int memcpy_real_user(__user void *dest, unsigned long src, size_t count)
+{
+	static char buf[4096];
+	int offs = 0, size;
+
+	while (offs < count) {
+		size = min(sizeof(buf), count - offs);
+		if (memcpy_real(buf, src + offs, size))
+			return -EFAULT;
+		if (copy_to_user(dest + offs, buf, size))
+			return -EFAULT;
+		offs += size;
+	}
+	return 0;
+}
+
+#ifdef __s390x__
+/*
+ * Convert s390x (64 bit) cpu info to s390 (32 bit) cpu info
+ */
+static void __init s390x_to_s390_regs(union save_area *out, union save_area *in,
+				      int cpu)
+{
+	int i;
+
+	for (i = 0; i < 16; i++) {
+		out->s390.gp_regs[i] = in->s390x.gp_regs[i] & 0x00000000ffffffff;
+		out->s390.acc_regs[i] = in->s390x.acc_regs[i];
+		out->s390.ctrl_regs[i] =
+			in->s390x.ctrl_regs[i] & 0x00000000ffffffff;
+	}
+	/* locore for 31 bit has only space for fpregs 0,2,4,6 */
+	out->s390.fp_regs[0] = in->s390x.fp_regs[0];
+	out->s390.fp_regs[1] = in->s390x.fp_regs[2];
+	out->s390.fp_regs[2] = in->s390x.fp_regs[4];
+	out->s390.fp_regs[3] = in->s390x.fp_regs[6];
+	memcpy(&(out->s390.psw[0]), &(in->s390x.psw[0]), 4);
+	out->s390.psw[1] |= 0x8; /* set bit 12 */
+	memcpy(&(out->s390.psw[4]),&(in->s390x.psw[12]), 4);
+	out->s390.psw[4] |= 0x80; /* set (31bit) addressing bit */
+	out->s390.pref_reg = in->s390x.pref_reg;
+	out->s390.timer = in->s390x.timer;
+	out->s390.clk_cmp = in->s390x.clk_cmp;
+}
+
+static void __init s390x_to_s390_save_areas(void)
+{
+	int i = 1;
+	static union save_area tmp;
+
+	while (zfcpdump_save_areas[i]) {
+		s390x_to_s390_regs(&tmp, zfcpdump_save_areas[i], i);
+		memcpy(zfcpdump_save_areas[i], &tmp, sizeof(tmp));
+		i++;
+	}
+}
+
+#endif /* __s390x__ */
+
+static int __init init_cpu_info(enum arch_id arch)
+{
+	union save_area *sa;
+
+	/* get info for boot cpu from lowcore, stored in the HSA */
+
+	sa = kmalloc(sizeof(*sa), GFP_KERNEL);
+	if (!sa) {
+		ERROR_MSG("kmalloc failed: %s: %i\n",__FUNCTION__, __LINE__);
+		return -ENOMEM;
+	}
+	if (memcpy_hsa_kernel(sa, sys_info.sa_base, sys_info.sa_size) < 0) {
+		ERROR_MSG("could not copy from HSA\n");
+		kfree(sa);
+		return -EIO;
+	}
+	zfcpdump_save_areas[0] = sa;
+
+#ifdef __s390x__
+	/* convert s390x regs to s390, if we are dumping an s390 Linux */
+
+	if (arch == ARCH_S390)
+		s390x_to_s390_save_areas();
+#endif
+
+	return 0;
+}
+
+static DEFINE_MUTEX(zcore_mutex);
+
+#define DUMP_VERSION	0x3
+#define DUMP_MAGIC	0xa8190173618f23fdULL
+#define DUMP_ARCH_S390X	2
+#define DUMP_ARCH_S390	1
+#define HEADER_SIZE	4096
+
+/* dump header dumped according to s390 crash dump format */
+
+struct zcore_header {
+	u64 magic;
+	u32 version;
+	u32 header_size;
+	u32 dump_level;
+	u32 page_size;
+	u64 mem_size;
+	u64 mem_start;
+	u64 mem_end;
+	u32 num_pages;
+	u32 pad1;
+	u64 tod;
+	cpuid_t cpu_id;
+	u32 arch_id;
+	u32 build_arch;
+	char pad2[4016];
+} __attribute__((packed,__aligned__(16)));
+
+static struct zcore_header zcore_header = {
+	.magic		= DUMP_MAGIC,
+	.version	= DUMP_VERSION,
+	.header_size	= 4096,
+	.dump_level	= 0,
+	.page_size	= PAGE_SIZE,
+	.mem_start	= 0,
+#ifdef __s390x__
+	.build_arch	= DUMP_ARCH_S390X,
+#else
+	.build_arch	= DUMP_ARCH_S390,
+#endif
+};
+
+/*
+ * Copy lowcore info to buffer. Use map in order to copy only register parts.
+ *
+ * @buf:    User buffer
+ * @sa:     Pointer to save area
+ * @sa_off: Offset in save area to copy
+ * @len:    Number of bytes to copy
+ */
+static int copy_lc(void __user *buf, void *sa, int sa_off, int len)
+{
+	int i;
+	char *lc_mask = (char*)&sys_info.lc_mask;
+
+	for (i = 0; i < len; i++) {
+		if (!lc_mask[i + sa_off])
+			continue;
+		if (copy_to_user(buf + i, sa + sa_off + i, 1))
+			return -EFAULT;
+	}
+	return 0;
+}
+
+/*
+ * Copy lowcores info to memory, if necessary
+ *
+ * @buf:   User buffer
+ * @addr:  Start address of buffer in dump memory
+ * @count: Size of buffer
+ */
+static int zcore_add_lc(char __user *buf, unsigned long start, size_t count)
+{
+	unsigned long end;
+	int i = 0;
+
+	if (count == 0)
+		return 0;
+
+	end = start + count;
+	while (zfcpdump_save_areas[i]) {
+		unsigned long cp_start, cp_end; /* copy range */
+		unsigned long sa_start, sa_end; /* save area range */
+		unsigned long prefix;
+		unsigned long sa_off, len, buf_off;
+
+		if (sys_info.arch == ARCH_S390)
+			prefix = zfcpdump_save_areas[i]->s390.pref_reg;
+		else
+			prefix = zfcpdump_save_areas[i]->s390x.pref_reg;
+
+		sa_start = prefix + sys_info.sa_base;
+		sa_end = prefix + sys_info.sa_base + sys_info.sa_size;
+
+		if ((end < sa_start) || (start > sa_end))
+			goto next;
+		cp_start = max(start, sa_start);
+		cp_end = min(end, sa_end);
+
+		buf_off = cp_start - start;
+		sa_off = cp_start - sa_start;
+		len = cp_end - cp_start;
+
+		TRACE("copy_lc for: %lx\n", start);
+		if (copy_lc(buf + buf_off, zfcpdump_save_areas[i], sa_off, len))
+			return -EFAULT;
+next:
+		i++;
+	}
+	return 0;
+}
+
+/*
+ * Read routine for zcore character device
+ * First 4K are dump header
+ * Next 32MB are HSA Memory
+ * Rest is read from absolute Memory
+ */
+static ssize_t zcore_read(struct file *file, char __user *buf, size_t count,
+			  loff_t *ppos)
+{
+	unsigned long mem_start; /* Start address in memory */
+	size_t mem_offs;	 /* Offset in dump memory */
+	size_t hdr_count;	 /* Size of header part of output buffer */
+	size_t size;
+	int rc;
+
+	mutex_lock(&zcore_mutex);
+
+	if (*ppos > (sys_info.mem_size + HEADER_SIZE)) {
+		rc = -EINVAL;
+		goto fail;
+	}
+
+	count = min(count, (size_t) (sys_info.mem_size + HEADER_SIZE - *ppos));
+
+	/* Copy dump header */
+	if (*ppos < HEADER_SIZE) {
+		size = min(count, (size_t) (HEADER_SIZE - *ppos));
+		if (copy_to_user(buf, &zcore_header + *ppos, size)) {
+			rc = -EFAULT;
+			goto fail;
+		}
+		hdr_count = size;
+		mem_start = 0;
+	} else {
+		hdr_count = 0;
+		mem_start = *ppos - HEADER_SIZE;
+	}
+
+	mem_offs = 0;
+
+	/* Copy from HSA data */
+	if (*ppos < (ZFCPDUMP_HSA_SIZE + HEADER_SIZE)) {
+		size = min((count - hdr_count), (size_t) (ZFCPDUMP_HSA_SIZE
+			   - mem_start));
+		rc = memcpy_hsa_user(buf + hdr_count, mem_start, size);
+		if (rc)
+			goto fail;
+
+		mem_offs += size;
+	}
+
+	/* Copy from real mem */
+	size = count - mem_offs - hdr_count;
+	rc = memcpy_real_user(buf + hdr_count + mem_offs, mem_start + mem_offs,
+			      size);
+	if (rc)
+		goto fail;
+
+	/*
+	 * Since s390 dump analysis tools like lcrash or crash
+	 * expect register sets in the prefix pages of the cpus,
+	 * we copy them into the read buffer, if necessary.
+	 * buf + hdr_count: Start of memory part of output buffer
+	 * mem_start: Start memory address to copy from
+	 * count - hdr_count: Size of memory area to copy
+	 */
+	if (zcore_add_lc(buf + hdr_count, mem_start, count - hdr_count)) {
+		rc = -EFAULT;
+		goto fail;
+	}
+	*ppos += count;
+fail:
+	mutex_unlock(&zcore_mutex);
+	return (rc < 0) ? rc : count;
+}
+
+static int zcore_open(struct inode *inode, struct file *filp)
+{
+	if (!hsa_available)
+		return -ENODATA;
+	else
+		return capable(CAP_SYS_RAWIO) ? 0 : -EPERM;
+}
+
+static int zcore_release(struct inode *inode, struct file *filep)
+{
+	diag308(DIAG308_REL_HSA, NULL);
+	hsa_available = 0;
+	return 0;
+}
+
+static loff_t zcore_lseek(struct file *file, loff_t offset, int orig)
+{
+	loff_t rc;
+
+	mutex_lock(&zcore_mutex);
+	switch (orig) {
+	case 0:
+		file->f_pos = offset;
+		rc = file->f_pos;
+		break;
+	case 1:
+		file->f_pos += offset;
+		rc = file->f_pos;
+		break;
+	default:
+		rc = -EINVAL;
+	}
+	mutex_unlock(&zcore_mutex);
+	return rc;
+}
+
+static struct file_operations zcore_fops = {
+	.owner		= THIS_MODULE,
+	.llseek		= zcore_lseek,
+	.read		= zcore_read,
+	.open		= zcore_open,
+	.release	= zcore_release,
+};
+
+
+static void __init set_s390_lc_mask(union save_area *map)
+{
+	memset(&map->s390.ext_save, 0xff, sizeof(map->s390.ext_save));
+	memset(&map->s390.timer, 0xff, sizeof(map->s390.timer));
+	memset(&map->s390.clk_cmp, 0xff, sizeof(map->s390.clk_cmp));
+	memset(&map->s390.psw, 0xff, sizeof(map->s390.psw));
+	memset(&map->s390.pref_reg, 0xff, sizeof(map->s390.pref_reg));
+	memset(&map->s390.acc_regs, 0xff, sizeof(map->s390.acc_regs));
+	memset(&map->s390.fp_regs, 0xff, sizeof(map->s390.fp_regs));
+	memset(&map->s390.gp_regs, 0xff, sizeof(map->s390.gp_regs));
+	memset(&map->s390.ctrl_regs, 0xff, sizeof(map->s390.ctrl_regs));
+}
+
+static void __init set_s390x_lc_mask(union save_area *map)
+{
+	memset(&map->s390x.fp_regs, 0xff, sizeof(map->s390x.fp_regs));
+	memset(&map->s390x.gp_regs, 0xff, sizeof(map->s390x.gp_regs));
+	memset(&map->s390x.psw, 0xff, sizeof(map->s390x.psw));
+	memset(&map->s390x.pref_reg, 0xff, sizeof(map->s390x.pref_reg));
+	memset(&map->s390x.fp_ctrl_reg, 0xff, sizeof(map->s390x.fp_ctrl_reg));
+	memset(&map->s390x.tod_reg, 0xff, sizeof(map->s390x.tod_reg));
+	memset(&map->s390x.timer, 0xff, sizeof(map->s390x.timer));
+	memset(&map->s390x.clk_cmp, 0xff, sizeof(map->s390x.clk_cmp));
+	memset(&map->s390x.acc_regs, 0xff, sizeof(map->s390x.acc_regs));
+	memset(&map->s390x.ctrl_regs, 0xff, sizeof(map->s390x.ctrl_regs));
+}
+
+/*
+ * Initialize dump globals for a given architecture
+ */
+static int __init sys_info_init(enum arch_id arch)
+{
+	switch (arch) {
+	case ARCH_S390X:
+		MSG("DETECTED 'S390X (64 bit) OS'\n");
+		sys_info.sa_base = SAVE_AREA_BASE_S390X;
+		sys_info.sa_size = sizeof(struct save_area_s390x);
+		set_s390x_lc_mask(&sys_info.lc_mask);
+		break;
+	case ARCH_S390:
+		MSG("DETECTED 'S390 (32 bit) OS'\n");
+		sys_info.sa_base = SAVE_AREA_BASE_S390;
+		sys_info.sa_size = sizeof(struct save_area_s390);
+		set_s390_lc_mask(&sys_info.lc_mask);
+		break;
+	default:
+		ERROR_MSG("unknown architecture 0x%x.\n",arch);
+		return -EINVAL;
+	}
+	sys_info.arch = arch;
+	if (init_cpu_info(arch)) {
+		ERROR_MSG("get cpu info failed\n");
+		return -ENOMEM;
+	}
+	sys_info.mem_size = real_memory_size;
+
+	return 0;
+}
+
+static int __init check_sdias(void)
+{
+	int rc, act_hsa_size;
+
+	rc = sclp_sdias_blk_count();
+	if (rc < 0) {
+		ERROR_MSG("Could not determine HSA size\n");
+		return rc;
+	}
+	act_hsa_size = (rc - 1) * PAGE_SIZE;
+	if (act_hsa_size < ZFCPDUMP_HSA_SIZE) {
+		ERROR_MSG("HSA size too small: %i\n", act_hsa_size);
+		return -EINVAL;
+	}
+	return 0;
+}
+
+static void __init zcore_header_init(int arch, struct zcore_header *hdr)
+{
+	if (arch == ARCH_S390X)
+		hdr->arch_id = DUMP_ARCH_S390X;
+	else
+		hdr->arch_id = DUMP_ARCH_S390;
+	hdr->mem_size = sys_info.mem_size;
+	hdr->mem_end = sys_info.mem_size;
+	hdr->num_pages = sys_info.mem_size / PAGE_SIZE;
+	hdr->tod = get_clock();
+	get_cpu_id(&hdr->cpu_id);
+}
+
+extern int sdias_init(void);
+
+static int __init zcore_init(void)
+{
+	unsigned char arch;
+	int rc;
+
+	if (ipl_info.type != IPL_TYPE_FCP_DUMP)
+		return -ENODATA;
+
+	zcore_dbf = debug_register("zcore", 4, 1, 4 * sizeof(long));
+	debug_register_view(zcore_dbf, &debug_sprintf_view);
+	debug_set_level(zcore_dbf, 6);
+
+	TRACE("devno:  %x\n", ipl_info.data.fcp.dev_id.devno);
+	TRACE("wwpn:   %llx\n", (unsigned long long) ipl_info.data.fcp.wwpn);
+	TRACE("lun:    %llx\n", (unsigned long long) ipl_info.data.fcp.lun);
+
+	rc = sdias_init();
+	if (rc)
+		goto fail;
+
+	rc = check_sdias();
+	if (rc) {
+		ERROR_MSG("Dump initialization failed\n");
+		goto fail;
+	}
+
+	rc = memcpy_hsa_kernel(&arch, __LC_AR_MODE_ID, 1);
+	if (rc) {
+		ERROR_MSG("sdial memcpy for arch id failed\n");
+		goto fail;
+	}
+
+#ifndef __s390x__
+	if (arch == ARCH_S390X) {
+		ERROR_MSG("32 bit dumper can't dump 64 bit system!\n");
+		rc = -EINVAL;
+		goto fail;
+	}
+#endif
+
+	rc = sys_info_init(arch);
+	if (rc) {
+		ERROR_MSG("arch init failed\n");
+		goto fail;
+	}
+
+	zcore_header_init(arch, &zcore_header);
+
+	zcore_dir = debugfs_create_dir("zcore" , NULL);
+	if (!zcore_dir) {
+		rc = -ENOMEM;
+		goto fail;
+	}
+	zcore_file = debugfs_create_file("mem", S_IRUSR, zcore_dir, NULL,
+					 &zcore_fops);
+	if (!zcore_file) {
+		debugfs_remove(zcore_dir);
+		rc = -ENOMEM;
+		goto fail;
+	}
+	hsa_available = 1;
+	return 0;
+
+fail:
+	diag308(DIAG308_REL_HSA, NULL);
+	return rc;
+}
+
+extern void sdias_exit(void);
+
+static void __exit zcore_exit(void)
+{
+	debug_unregister(zcore_dbf);
+	sdias_exit();
+	diag308(DIAG308_REL_HSA, NULL);
+}
+
+MODULE_AUTHOR("Copyright IBM Corp. 2003,2007");
+MODULE_DESCRIPTION("zcore module for zfcpdump support");
+MODULE_LICENSE("GPL");
+
+subsys_initcall(zcore_init);
+module_exit(zcore_exit);
diff --git a/drivers/s390/cio/Makefile b/drivers/s390/cio/Makefile
index c490c2a1c2fc..cfaf77b320f5 100644
--- a/drivers/s390/cio/Makefile
+++ b/drivers/s390/cio/Makefile
@@ -2,7 +2,7 @@
 # Makefile for the S/390 common i/o drivers
 #
 
-obj-y += airq.o blacklist.o chsc.o cio.o css.o
+obj-y += airq.o blacklist.o chsc.o cio.o css.o chp.o idset.o
 ccw_device-objs += device.o device_fsm.o device_ops.o
 ccw_device-objs += device_id.o device_pgid.o device_status.o
 obj-y += ccw_device.o cmf.o
diff --git a/drivers/s390/cio/ccwgroup.c b/drivers/s390/cio/ccwgroup.c
index 5aeb68e732b0..e5ccda63e883 100644
--- a/drivers/s390/cio/ccwgroup.c
+++ b/drivers/s390/cio/ccwgroup.c
@@ -75,8 +75,10 @@ static void ccwgroup_ungroup_callback(struct device *dev)
 {
 	struct ccwgroup_device *gdev = to_ccwgroupdev(dev);
 
+	mutex_lock(&gdev->reg_mutex);
 	__ccwgroup_remove_symlinks(gdev);
 	device_unregister(dev);
+	mutex_unlock(&gdev->reg_mutex);
 }
 
 static ssize_t
@@ -173,7 +175,8 @@ ccwgroup_create(struct device *root,
 		return -ENOMEM;
 
 	atomic_set(&gdev->onoff, 0);
-
+	mutex_init(&gdev->reg_mutex);
+	mutex_lock(&gdev->reg_mutex);
 	for (i = 0; i < argc; i++) {
 		gdev->cdev[i] = get_ccwdev_by_busid(cdrv, argv[i]);
 
@@ -183,12 +186,12 @@ ccwgroup_create(struct device *root,
 		    || gdev->cdev[i]->id.driver_info !=
 		    gdev->cdev[0]->id.driver_info) {
 			rc = -EINVAL;
-			goto free_dev;
+			goto error;
 		}
 		/* Don't allow a device to belong to more than one group. */
 		if (gdev->cdev[i]->dev.driver_data) {
 			rc = -EINVAL;
-			goto free_dev;
+			goto error;
 		}
 		gdev->cdev[i]->dev.driver_data = gdev;
 	}
@@ -203,9 +206,8 @@ ccwgroup_create(struct device *root,
 			gdev->cdev[0]->dev.bus_id);
 
 	rc = device_register(&gdev->dev);
-	
 	if (rc)
-		goto free_dev;
+		goto error;
 	get_device(&gdev->dev);
 	rc = device_create_file(&gdev->dev, &dev_attr_ungroup);
 
@@ -216,6 +218,7 @@ ccwgroup_create(struct device *root,
 
 	rc = __ccwgroup_create_symlinks(gdev);
 	if (!rc) {
+		mutex_unlock(&gdev->reg_mutex);
 		put_device(&gdev->dev);
 		return 0;
 	}
@@ -224,19 +227,12 @@ ccwgroup_create(struct device *root,
 error:
 	for (i = 0; i < argc; i++)
 		if (gdev->cdev[i]) {
-			put_device(&gdev->cdev[i]->dev);
-			gdev->cdev[i]->dev.driver_data = NULL;
-		}
-	put_device(&gdev->dev);
-	return rc;
-free_dev:
-	for (i = 0; i < argc; i++)
-		if (gdev->cdev[i]) {
 			if (gdev->cdev[i]->dev.driver_data == gdev)
 				gdev->cdev[i]->dev.driver_data = NULL;
 			put_device(&gdev->cdev[i]->dev);
 		}
-	kfree(gdev);
+	mutex_unlock(&gdev->reg_mutex);
+	put_device(&gdev->dev);
 	return rc;
 }
 
@@ -422,8 +418,12 @@ ccwgroup_driver_unregister (struct ccwgroup_driver *cdriver)
 	get_driver(&cdriver->driver);
 	while ((dev = driver_find_device(&cdriver->driver, NULL, NULL,
 					 __ccwgroup_match_all))) {
-		__ccwgroup_remove_symlinks(to_ccwgroupdev(dev));
+		struct ccwgroup_device *gdev = to_ccwgroupdev(dev);
+
+		mutex_lock(&gdev->reg_mutex);
+		__ccwgroup_remove_symlinks(gdev);
 		device_unregister(dev);
+		mutex_unlock(&gdev->reg_mutex);
 		put_device(dev);
 	}
 	put_driver(&cdriver->driver);
@@ -444,8 +444,10 @@ __ccwgroup_get_gdev_by_cdev(struct ccw_device *cdev)
 	if (cdev->dev.driver_data) {
 		gdev = (struct ccwgroup_device *)cdev->dev.driver_data;
 		if (get_device(&gdev->dev)) {
+			mutex_lock(&gdev->reg_mutex);
 			if (device_is_registered(&gdev->dev))
 				return gdev;
+			mutex_unlock(&gdev->reg_mutex);
 			put_device(&gdev->dev);
 		}
 		return NULL;
@@ -465,6 +467,7 @@ ccwgroup_remove_ccwdev(struct ccw_device *cdev)
 	if (gdev) {
 		__ccwgroup_remove_symlinks(gdev);
 		device_unregister(&gdev->dev);
+		mutex_unlock(&gdev->reg_mutex);
 		put_device(&gdev->dev);
 	}
 }
diff --git a/drivers/s390/cio/chp.c b/drivers/s390/cio/chp.c
new file mode 100644
index 000000000000..ac289e6eadfe
--- /dev/null
+++ b/drivers/s390/cio/chp.c
@@ -0,0 +1,683 @@
+/*
+ *  drivers/s390/cio/chp.c
+ *
+ *    Copyright IBM Corp. 1999,2007
+ *    Author(s): Cornelia Huck (cornelia.huck@de.ibm.com)
+ *		 Arnd Bergmann (arndb@de.ibm.com)
+ *		 Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
+ */
+
+#include <linux/bug.h>
+#include <linux/workqueue.h>
+#include <linux/spinlock.h>
+#include <linux/init.h>
+#include <linux/jiffies.h>
+#include <linux/wait.h>
+#include <linux/mutex.h>
+#include <asm/errno.h>
+#include <asm/chpid.h>
+#include <asm/sclp.h>
+
+#include "cio.h"
+#include "css.h"
+#include "ioasm.h"
+#include "cio_debug.h"
+#include "chp.h"
+
+#define to_channelpath(device) container_of(device, struct channel_path, dev)
+#define CHP_INFO_UPDATE_INTERVAL	1*HZ
+
+enum cfg_task_t {
+	cfg_none,
+	cfg_configure,
+	cfg_deconfigure
+};
+
+/* Map for pending configure tasks. */
+static enum cfg_task_t chp_cfg_task[__MAX_CSSID + 1][__MAX_CHPID + 1];
+static DEFINE_MUTEX(cfg_lock);
+static int cfg_busy;
+
+/* Map for channel-path status. */
+static struct sclp_chp_info chp_info;
+static DEFINE_MUTEX(info_lock);
+
+/* Time after which channel-path status may be outdated. */
+static unsigned long chp_info_expires;
+
+/* Workqueue to perform pending configure tasks. */
+static struct workqueue_struct *chp_wq;
+static struct work_struct cfg_work;
+
+/* Wait queue for configure completion events. */
+static wait_queue_head_t cfg_wait_queue;
+
+/* Return channel_path struct for given chpid. */
+static inline struct channel_path *chpid_to_chp(struct chp_id chpid)
+{
+	return css[chpid.cssid]->chps[chpid.id];
+}
+
+/* Set vary state for given chpid. */
+static void set_chp_logically_online(struct chp_id chpid, int onoff)
+{
+	chpid_to_chp(chpid)->state = onoff;
+}
+
+/* On succes return 0 if channel-path is varied offline, 1 if it is varied
+ * online. Return -ENODEV if channel-path is not registered. */
+int chp_get_status(struct chp_id chpid)
+{
+	return (chpid_to_chp(chpid) ? chpid_to_chp(chpid)->state : -ENODEV);
+}
+
+/**
+ * chp_get_sch_opm - return opm for subchannel
+ * @sch: subchannel
+ *
+ * Calculate and return the operational path mask (opm) based on the chpids
+ * used by the subchannel and the status of the associated channel-paths.
+ */
+u8 chp_get_sch_opm(struct subchannel *sch)
+{
+	struct chp_id chpid;
+	int opm;
+	int i;
+
+	opm = 0;
+	chp_id_init(&chpid);
+	for (i=0; i < 8; i++) {
+		opm <<= 1;
+		chpid.id = sch->schib.pmcw.chpid[i];
+		if (chp_get_status(chpid) != 0)
+			opm |= 1;
+	}
+	return opm;
+}
+
+/**
+ * chp_is_registered - check if a channel-path is registered
+ * @chpid: channel-path ID
+ *
+ * Return non-zero if a channel-path with the given chpid is registered,
+ * zero otherwise.
+ */
+int chp_is_registered(struct chp_id chpid)
+{
+	return chpid_to_chp(chpid) != NULL;
+}
+
+/*
+ * Function: s390_vary_chpid
+ * Varies the specified chpid online or offline
+ */
+static int s390_vary_chpid(struct chp_id chpid, int on)
+{
+	char dbf_text[15];
+	int status;
+
+	sprintf(dbf_text, on?"varyon%x.%02x":"varyoff%x.%02x", chpid.cssid,
+		chpid.id);
+	CIO_TRACE_EVENT( 2, dbf_text);
+
+	status = chp_get_status(chpid);
+	if (status < 0) {
+		printk(KERN_ERR "Can't vary unknown chpid %x.%02x\n",
+		       chpid.cssid, chpid.id);
+		return -EINVAL;
+	}
+
+	if (!on && !status) {
+		printk(KERN_ERR "chpid %x.%02x is already offline\n",
+		       chpid.cssid, chpid.id);
+		return -EINVAL;
+	}
+
+	set_chp_logically_online(chpid, on);
+	chsc_chp_vary(chpid, on);
+	return 0;
+}
+
+/*
+ * Channel measurement related functions
+ */
+static ssize_t chp_measurement_chars_read(struct kobject *kobj, char *buf,
+					  loff_t off, size_t count)
+{
+	struct channel_path *chp;
+	unsigned int size;
+
+	chp = to_channelpath(container_of(kobj, struct device, kobj));
+	if (!chp->cmg_chars)
+		return 0;
+
+	size = sizeof(struct cmg_chars);
+
+	if (off > size)
+		return 0;
+	if (off + count > size)
+		count = size - off;
+	memcpy(buf, chp->cmg_chars + off, count);
+	return count;
+}
+
+static struct bin_attribute chp_measurement_chars_attr = {
+	.attr = {
+		.name = "measurement_chars",
+		.mode = S_IRUSR,
+		.owner = THIS_MODULE,
+	},
+	.size = sizeof(struct cmg_chars),
+	.read = chp_measurement_chars_read,
+};
+
+static void chp_measurement_copy_block(struct cmg_entry *buf,
+				       struct channel_subsystem *css,
+				       struct chp_id chpid)
+{
+	void *area;
+	struct cmg_entry *entry, reference_buf;
+	int idx;
+
+	if (chpid.id < 128) {
+		area = css->cub_addr1;
+		idx = chpid.id;
+	} else {
+		area = css->cub_addr2;
+		idx = chpid.id - 128;
+	}
+	entry = area + (idx * sizeof(struct cmg_entry));
+	do {
+		memcpy(buf, entry, sizeof(*entry));
+		memcpy(&reference_buf, entry, sizeof(*entry));
+	} while (reference_buf.values[0] != buf->values[0]);
+}
+
+static ssize_t chp_measurement_read(struct kobject *kobj, char *buf,
+				    loff_t off, size_t count)
+{
+	struct channel_path *chp;
+	struct channel_subsystem *css;
+	unsigned int size;
+
+	chp = to_channelpath(container_of(kobj, struct device, kobj));
+	css = to_css(chp->dev.parent);
+
+	size = sizeof(struct cmg_entry);
+
+	/* Only allow single reads. */
+	if (off || count < size)
+		return 0;
+	chp_measurement_copy_block((struct cmg_entry *)buf, css, chp->chpid);
+	count = size;
+	return count;
+}
+
+static struct bin_attribute chp_measurement_attr = {
+	.attr = {
+		.name = "measurement",
+		.mode = S_IRUSR,
+		.owner = THIS_MODULE,
+	},
+	.size = sizeof(struct cmg_entry),
+	.read = chp_measurement_read,
+};
+
+void chp_remove_cmg_attr(struct channel_path *chp)
+{
+	device_remove_bin_file(&chp->dev, &chp_measurement_chars_attr);
+	device_remove_bin_file(&chp->dev, &chp_measurement_attr);
+}
+
+int chp_add_cmg_attr(struct channel_path *chp)
+{
+	int ret;
+
+	ret = device_create_bin_file(&chp->dev, &chp_measurement_chars_attr);
+	if (ret)
+		return ret;
+	ret = device_create_bin_file(&chp->dev, &chp_measurement_attr);
+	if (ret)
+		device_remove_bin_file(&chp->dev, &chp_measurement_chars_attr);
+	return ret;
+}
+
+/*
+ * Files for the channel path entries.
+ */
+static ssize_t chp_status_show(struct device *dev,
+			       struct device_attribute *attr, char *buf)
+{
+	struct channel_path *chp = container_of(dev, struct channel_path, dev);
+
+	if (!chp)
+		return 0;
+	return (chp_get_status(chp->chpid) ? sprintf(buf, "online\n") :
+		sprintf(buf, "offline\n"));
+}
+
+static ssize_t chp_status_write(struct device *dev,
+				struct device_attribute *attr,
+				const char *buf, size_t count)
+{
+	struct channel_path *cp = container_of(dev, struct channel_path, dev);
+	char cmd[10];
+	int num_args;
+	int error;
+
+	num_args = sscanf(buf, "%5s", cmd);
+	if (!num_args)
+		return count;
+
+	if (!strnicmp(cmd, "on", 2) || !strcmp(cmd, "1"))
+		error = s390_vary_chpid(cp->chpid, 1);
+	else if (!strnicmp(cmd, "off", 3) || !strcmp(cmd, "0"))
+		error = s390_vary_chpid(cp->chpid, 0);
+	else
+		error = -EINVAL;
+
+	return error < 0 ? error : count;
+
+}
+
+static DEVICE_ATTR(status, 0644, chp_status_show, chp_status_write);
+
+static ssize_t chp_configure_show(struct device *dev,
+				  struct device_attribute *attr, char *buf)
+{
+	struct channel_path *cp;
+	int status;
+
+	cp = container_of(dev, struct channel_path, dev);
+	status = chp_info_get_status(cp->chpid);
+	if (status < 0)
+		return status;
+
+	return snprintf(buf, PAGE_SIZE, "%d\n", status);
+}
+
+static int cfg_wait_idle(void);
+
+static ssize_t chp_configure_write(struct device *dev,
+				   struct device_attribute *attr,
+				   const char *buf, size_t count)
+{
+	struct channel_path *cp;
+	int val;
+	char delim;
+
+	if (sscanf(buf, "%d %c", &val, &delim) != 1)
+		return -EINVAL;
+	if (val != 0 && val != 1)
+		return -EINVAL;
+	cp = container_of(dev, struct channel_path, dev);
+	chp_cfg_schedule(cp->chpid, val);
+	cfg_wait_idle();
+
+	return count;
+}
+
+static DEVICE_ATTR(configure, 0644, chp_configure_show, chp_configure_write);
+
+static ssize_t chp_type_show(struct device *dev, struct device_attribute *attr,
+			     char *buf)
+{
+	struct channel_path *chp = container_of(dev, struct channel_path, dev);
+
+	if (!chp)
+		return 0;
+	return sprintf(buf, "%x\n", chp->desc.desc);
+}
+
+static DEVICE_ATTR(type, 0444, chp_type_show, NULL);
+
+static ssize_t chp_cmg_show(struct device *dev, struct device_attribute *attr,
+			    char *buf)
+{
+	struct channel_path *chp = to_channelpath(dev);
+
+	if (!chp)
+		return 0;
+	if (chp->cmg == -1) /* channel measurements not available */
+		return sprintf(buf, "unknown\n");
+	return sprintf(buf, "%x\n", chp->cmg);
+}
+
+static DEVICE_ATTR(cmg, 0444, chp_cmg_show, NULL);
+
+static ssize_t chp_shared_show(struct device *dev,
+			       struct device_attribute *attr, char *buf)
+{
+	struct channel_path *chp = to_channelpath(dev);
+
+	if (!chp)
+		return 0;
+	if (chp->shared == -1) /* channel measurements not available */
+		return sprintf(buf, "unknown\n");
+	return sprintf(buf, "%x\n", chp->shared);
+}
+
+static DEVICE_ATTR(shared, 0444, chp_shared_show, NULL);
+
+static struct attribute * chp_attrs[] = {
+	&dev_attr_status.attr,
+	&dev_attr_configure.attr,
+	&dev_attr_type.attr,
+	&dev_attr_cmg.attr,
+	&dev_attr_shared.attr,
+	NULL,
+};
+
+static struct attribute_group chp_attr_group = {
+	.attrs = chp_attrs,
+};
+
+static void chp_release(struct device *dev)
+{
+	struct channel_path *cp;
+
+	cp = container_of(dev, struct channel_path, dev);
+	kfree(cp);
+}
+
+/**
+ * chp_new - register a new channel-path
+ * @chpid - channel-path ID
+ *
+ * Create and register data structure representing new channel-path. Return
+ * zero on success, non-zero otherwise.
+ */
+int chp_new(struct chp_id chpid)
+{
+	struct channel_path *chp;
+	int ret;
+
+	if (chp_is_registered(chpid))
+		return 0;
+	chp = kzalloc(sizeof(struct channel_path), GFP_KERNEL);
+	if (!chp)
+		return -ENOMEM;
+
+	/* fill in status, etc. */
+	chp->chpid = chpid;
+	chp->state = 1;
+	chp->dev.parent = &css[chpid.cssid]->device;
+	chp->dev.release = chp_release;
+	snprintf(chp->dev.bus_id, BUS_ID_SIZE, "chp%x.%02x", chpid.cssid,
+		 chpid.id);
+
+	/* Obtain channel path description and fill it in. */
+	ret = chsc_determine_channel_path_description(chpid, &chp->desc);
+	if (ret)
+		goto out_free;
+	if ((chp->desc.flags & 0x80) == 0) {
+		ret = -ENODEV;
+		goto out_free;
+	}
+	/* Get channel-measurement characteristics. */
+	if (css_characteristics_avail && css_chsc_characteristics.scmc
+	    && css_chsc_characteristics.secm) {
+		ret = chsc_get_channel_measurement_chars(chp);
+		if (ret)
+			goto out_free;
+	} else {
+		static int msg_done;
+
+		if (!msg_done) {
+			printk(KERN_WARNING "cio: Channel measurements not "
+			       "available, continuing.\n");
+			msg_done = 1;
+		}
+		chp->cmg = -1;
+	}
+
+	/* make it known to the system */
+	ret = device_register(&chp->dev);
+	if (ret) {
+		printk(KERN_WARNING "%s: could not register %x.%02x\n",
+		       __func__, chpid.cssid, chpid.id);
+		goto out_free;
+	}
+	ret = sysfs_create_group(&chp->dev.kobj, &chp_attr_group);
+	if (ret) {
+		device_unregister(&chp->dev);
+		goto out_free;
+	}
+	mutex_lock(&css[chpid.cssid]->mutex);
+	if (css[chpid.cssid]->cm_enabled) {
+		ret = chp_add_cmg_attr(chp);
+		if (ret) {
+			sysfs_remove_group(&chp->dev.kobj, &chp_attr_group);
+			device_unregister(&chp->dev);
+			mutex_unlock(&css[chpid.cssid]->mutex);
+			goto out_free;
+		}
+	}
+	css[chpid.cssid]->chps[chpid.id] = chp;
+	mutex_unlock(&css[chpid.cssid]->mutex);
+	return ret;
+out_free:
+	kfree(chp);
+	return ret;
+}
+
+/**
+ * chp_get_chp_desc - return newly allocated channel-path description
+ * @chpid: channel-path ID
+ *
+ * On success return a newly allocated copy of the channel-path description
+ * data associated with the given channel-path ID. Return %NULL on error.
+ */
+void *chp_get_chp_desc(struct chp_id chpid)
+{
+	struct channel_path *chp;
+	struct channel_path_desc *desc;
+
+	chp = chpid_to_chp(chpid);
+	if (!chp)
+		return NULL;
+	desc = kmalloc(sizeof(struct channel_path_desc), GFP_KERNEL);
+	if (!desc)
+		return NULL;
+	memcpy(desc, &chp->desc, sizeof(struct channel_path_desc));
+	return desc;
+}
+
+/**
+ * chp_process_crw - process channel-path status change
+ * @id: channel-path ID number
+ * @status: non-zero if channel-path has become available, zero otherwise
+ *
+ * Handle channel-report-words indicating that the status of a channel-path
+ * has changed.
+ */
+void chp_process_crw(int id, int status)
+{
+	struct chp_id chpid;
+
+	chp_id_init(&chpid);
+	chpid.id = id;
+	if (status) {
+		if (!chp_is_registered(chpid))
+			chp_new(chpid);
+		chsc_chp_online(chpid);
+	} else
+		chsc_chp_offline(chpid);
+}
+
+static inline int info_bit_num(struct chp_id id)
+{
+	return id.id + id.cssid * (__MAX_CHPID + 1);
+}
+
+/* Force chp_info refresh on next call to info_validate(). */
+static void info_expire(void)
+{
+	mutex_lock(&info_lock);
+	chp_info_expires = jiffies - 1;
+	mutex_unlock(&info_lock);
+}
+
+/* Ensure that chp_info is up-to-date. */
+static int info_update(void)
+{
+	int rc;
+
+	mutex_lock(&info_lock);
+	rc = 0;
+	if (time_after(jiffies, chp_info_expires)) {
+		/* Data is too old, update. */
+		rc = sclp_chp_read_info(&chp_info);
+		chp_info_expires = jiffies + CHP_INFO_UPDATE_INTERVAL ;
+	}
+	mutex_unlock(&info_lock);
+
+	return rc;
+}
+
+/**
+ * chp_info_get_status - retrieve configure status of a channel-path
+ * @chpid: channel-path ID
+ *
+ * On success, return 0 for standby, 1 for configured, 2 for reserved,
+ * 3 for not recognized. Return negative error code on error.
+ */
+int chp_info_get_status(struct chp_id chpid)
+{
+	int rc;
+	int bit;
+
+	rc = info_update();
+	if (rc)
+		return rc;
+
+	bit = info_bit_num(chpid);
+	mutex_lock(&info_lock);
+	if (!chp_test_bit(chp_info.recognized, bit))
+		rc = CHP_STATUS_NOT_RECOGNIZED;
+	else if (chp_test_bit(chp_info.configured, bit))
+		rc = CHP_STATUS_CONFIGURED;
+	else if (chp_test_bit(chp_info.standby, bit))
+		rc = CHP_STATUS_STANDBY;
+	else
+		rc = CHP_STATUS_RESERVED;
+	mutex_unlock(&info_lock);
+
+	return rc;
+}
+
+/* Return configure task for chpid. */
+static enum cfg_task_t cfg_get_task(struct chp_id chpid)
+{
+	return chp_cfg_task[chpid.cssid][chpid.id];
+}
+
+/* Set configure task for chpid. */
+static void cfg_set_task(struct chp_id chpid, enum cfg_task_t cfg)
+{
+	chp_cfg_task[chpid.cssid][chpid.id] = cfg;
+}
+
+/* Perform one configure/deconfigure request. Reschedule work function until
+ * last request. */
+static void cfg_func(struct work_struct *work)
+{
+	struct chp_id chpid;
+	enum cfg_task_t t;
+
+	mutex_lock(&cfg_lock);
+	t = cfg_none;
+	chp_id_for_each(&chpid) {
+		t = cfg_get_task(chpid);
+		if (t != cfg_none) {
+			cfg_set_task(chpid, cfg_none);
+			break;
+		}
+	}
+	mutex_unlock(&cfg_lock);
+
+	switch (t) {
+	case cfg_configure:
+		sclp_chp_configure(chpid);
+		info_expire();
+		chsc_chp_online(chpid);
+		break;
+	case cfg_deconfigure:
+		sclp_chp_deconfigure(chpid);
+		info_expire();
+		chsc_chp_offline(chpid);
+		break;
+	case cfg_none:
+		/* Get updated information after last change. */
+		info_update();
+		mutex_lock(&cfg_lock);
+		cfg_busy = 0;
+		mutex_unlock(&cfg_lock);
+		wake_up_interruptible(&cfg_wait_queue);
+		return;
+	}
+	queue_work(chp_wq, &cfg_work);
+}
+
+/**
+ * chp_cfg_schedule - schedule chpid configuration request
+ * @chpid - channel-path ID
+ * @configure - Non-zero for configure, zero for deconfigure
+ *
+ * Schedule a channel-path configuration/deconfiguration request.
+ */
+void chp_cfg_schedule(struct chp_id chpid, int configure)
+{
+	CIO_MSG_EVENT(2, "chp_cfg_sched%x.%02x=%d\n", chpid.cssid, chpid.id,
+		      configure);
+	mutex_lock(&cfg_lock);
+	cfg_set_task(chpid, configure ? cfg_configure : cfg_deconfigure);
+	cfg_busy = 1;
+	mutex_unlock(&cfg_lock);
+	queue_work(chp_wq, &cfg_work);
+}
+
+/**
+ * chp_cfg_cancel_deconfigure - cancel chpid deconfiguration request
+ * @chpid - channel-path ID
+ *
+ * Cancel an active channel-path deconfiguration request if it has not yet
+ * been performed.
+ */
+void chp_cfg_cancel_deconfigure(struct chp_id chpid)
+{
+	CIO_MSG_EVENT(2, "chp_cfg_cancel:%x.%02x\n", chpid.cssid, chpid.id);
+	mutex_lock(&cfg_lock);
+	if (cfg_get_task(chpid) == cfg_deconfigure)
+		cfg_set_task(chpid, cfg_none);
+	mutex_unlock(&cfg_lock);
+}
+
+static int cfg_wait_idle(void)
+{
+	if (wait_event_interruptible(cfg_wait_queue, !cfg_busy))
+		return -ERESTARTSYS;
+	return 0;
+}
+
+static int __init chp_init(void)
+{
+	struct chp_id chpid;
+
+	chp_wq = create_singlethread_workqueue("cio_chp");
+	if (!chp_wq)
+		return -ENOMEM;
+	INIT_WORK(&cfg_work, cfg_func);
+	init_waitqueue_head(&cfg_wait_queue);
+	if (info_update())
+		return 0;
+	/* Register available channel-paths. */
+	chp_id_for_each(&chpid) {
+		if (chp_info_get_status(chpid) != CHP_STATUS_NOT_RECOGNIZED)
+			chp_new(chpid);
+	}
+
+	return 0;
+}
+
+subsys_initcall(chp_init);
diff --git a/drivers/s390/cio/chp.h b/drivers/s390/cio/chp.h
new file mode 100644
index 000000000000..65286563c592
--- /dev/null
+++ b/drivers/s390/cio/chp.h
@@ -0,0 +1,53 @@
+/*
+ *  drivers/s390/cio/chp.h
+ *
+ *    Copyright IBM Corp. 2007
+ *    Author(s): Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
+ */
+
+#ifndef S390_CHP_H
+#define S390_CHP_H S390_CHP_H
+
+#include <linux/types.h>
+#include <linux/device.h>
+#include <asm/chpid.h>
+#include "chsc.h"
+
+#define CHP_STATUS_STANDBY		0
+#define CHP_STATUS_CONFIGURED		1
+#define CHP_STATUS_RESERVED		2
+#define CHP_STATUS_NOT_RECOGNIZED	3
+
+static inline int chp_test_bit(u8 *bitmap, int num)
+{
+	int byte = num >> 3;
+	int mask = 128 >> (num & 7);
+
+	return (bitmap[byte] & mask) ? 1 : 0;
+}
+
+
+struct channel_path {
+	struct chp_id chpid;
+	int state;
+	struct channel_path_desc desc;
+	/* Channel-measurement related stuff: */
+	int cmg;
+	int shared;
+	void *cmg_chars;
+	struct device dev;
+};
+
+int chp_get_status(struct chp_id chpid);
+u8 chp_get_sch_opm(struct subchannel *sch);
+int chp_is_registered(struct chp_id chpid);
+void *chp_get_chp_desc(struct chp_id chpid);
+void chp_process_crw(int id, int available);
+void chp_remove_cmg_attr(struct channel_path *chp);
+int chp_add_cmg_attr(struct channel_path *chp);
+int chp_new(struct chp_id chpid);
+void chp_cfg_schedule(struct chp_id chpid, int configure);
+void chp_cfg_cancel_deconfigure(struct chp_id chpid);
+int chp_info_get_status(struct chp_id chpid);
+
+#endif /* S390_CHP_H */
diff --git a/drivers/s390/cio/chsc.c b/drivers/s390/cio/chsc.c
index 6f05a44e3817..ea92ac4d6577 100644
--- a/drivers/s390/cio/chsc.c
+++ b/drivers/s390/cio/chsc.c
@@ -15,202 +15,124 @@
 #include <linux/device.h>
 
 #include <asm/cio.h>
+#include <asm/chpid.h>
 
 #include "css.h"
 #include "cio.h"
 #include "cio_debug.h"
 #include "ioasm.h"
+#include "chp.h"
 #include "chsc.h"
 
 static void *sei_page;
 
-static int new_channel_path(int chpid);
-
-static inline void
-set_chp_logically_online(int chp, int onoff)
-{
-	css[0]->chps[chp]->state = onoff;
-}
-
-static int
-get_chp_status(int chp)
-{
-	return (css[0]->chps[chp] ? css[0]->chps[chp]->state : -ENODEV);
-}
-
-void
-chsc_validate_chpids(struct subchannel *sch)
-{
-	int mask, chp;
-
-	for (chp = 0; chp <= 7; chp++) {
-		mask = 0x80 >> chp;
-		if (!get_chp_status(sch->schib.pmcw.chpid[chp]))
-			/* disable using this path */
-			sch->opm &= ~mask;
-	}
-}
-
-void
-chpid_is_actually_online(int chp)
-{
-	int state;
-
-	state = get_chp_status(chp);
-	if (state < 0) {
-		need_rescan = 1;
-		queue_work(slow_path_wq, &slow_path_work);
-	} else
-		WARN_ON(!state);
-}
+struct chsc_ssd_area {
+	struct chsc_header request;
+	u16 :10;
+	u16 ssid:2;
+	u16 :4;
+	u16 f_sch;	  /* first subchannel */
+	u16 :16;
+	u16 l_sch;	  /* last subchannel */
+	u32 :32;
+	struct chsc_header response;
+	u32 :32;
+	u8 sch_valid : 1;
+	u8 dev_valid : 1;
+	u8 st	     : 3; /* subchannel type */
+	u8 zeroes    : 3;
+	u8  unit_addr;	  /* unit address */
+	u16 devno;	  /* device number */
+	u8 path_mask;
+	u8 fla_valid_mask;
+	u16 sch;	  /* subchannel */
+	u8 chpid[8];	  /* chpids 0-7 */
+	u16 fla[8];	  /* full link addresses 0-7 */
+} __attribute__ ((packed));
 
-/* FIXME: this is _always_ called for every subchannel. shouldn't we
- *	  process more than one at a time? */
-static int
-chsc_get_sch_desc_irq(struct subchannel *sch, void *page)
+int chsc_get_ssd_info(struct subchannel_id schid, struct chsc_ssd_info *ssd)
 {
-	int ccode, j;
-
-	struct {
-		struct chsc_header request;
-		u16 reserved1a:10;
-		u16 ssid:2;
-		u16 reserved1b:4;
-		u16 f_sch;	  /* first subchannel */
-		u16 reserved2;
-		u16 l_sch;	  /* last subchannel */
-		u32 reserved3;
-		struct chsc_header response;
-		u32 reserved4;
-		u8 sch_valid : 1;
-		u8 dev_valid : 1;
-		u8 st	     : 3; /* subchannel type */
-		u8 zeroes    : 3;
-		u8  unit_addr;	  /* unit address */
-		u16 devno;	  /* device number */
-		u8 path_mask;
-		u8 fla_valid_mask;
-		u16 sch;	  /* subchannel */
-		u8 chpid[8];	  /* chpids 0-7 */
-		u16 fla[8];	  /* full link addresses 0-7 */
-	} __attribute__ ((packed)) *ssd_area;
-
-	ssd_area = page;
+	unsigned long page;
+	struct chsc_ssd_area *ssd_area;
+	int ccode;
+	int ret;
+	int i;
+	int mask;
 
+	page = get_zeroed_page(GFP_KERNEL | GFP_DMA);
+	if (!page)
+		return -ENOMEM;
+	ssd_area = (struct chsc_ssd_area *) page;
 	ssd_area->request.length = 0x0010;
 	ssd_area->request.code = 0x0004;
-
-	ssd_area->ssid = sch->schid.ssid;
-	ssd_area->f_sch = sch->schid.sch_no;
-	ssd_area->l_sch = sch->schid.sch_no;
+	ssd_area->ssid = schid.ssid;
+	ssd_area->f_sch = schid.sch_no;
+	ssd_area->l_sch = schid.sch_no;
 
 	ccode = chsc(ssd_area);
+	/* Check response. */
 	if (ccode > 0) {
-		pr_debug("chsc returned with ccode = %d\n", ccode);
-		return (ccode == 3) ? -ENODEV : -EBUSY;
+		ret = (ccode == 3) ? -ENODEV : -EBUSY;
+		goto out_free;
 	}
-
-	switch (ssd_area->response.code) {
-	case 0x0001: /* everything ok */
-		break;
-	case 0x0002:
-		CIO_CRW_EVENT(2, "Invalid command!\n");
-		return -EINVAL;
-	case 0x0003:
-		CIO_CRW_EVENT(2, "Error in chsc request block!\n");
-		return -EINVAL;
-	case 0x0004:
-		CIO_CRW_EVENT(2, "Model does not provide ssd\n");
-		return -EOPNOTSUPP;
-	default:
-		CIO_CRW_EVENT(2, "Unknown CHSC response %d\n",
+	if (ssd_area->response.code != 0x0001) {
+		CIO_MSG_EVENT(2, "chsc: ssd failed for 0.%x.%04x (rc=%04x)\n",
+			      schid.ssid, schid.sch_no,
 			      ssd_area->response.code);
-		return -EIO;
+		ret = -EIO;
+		goto out_free;
 	}
-
-	/*
-	 * ssd_area->st stores the type of the detected
-	 * subchannel, with the following definitions:
-	 *
-	 * 0: I/O subchannel:	  All fields have meaning
-	 * 1: CHSC subchannel:	  Only sch_val, st and sch
-	 *			  have meaning
-	 * 2: Message subchannel: All fields except unit_addr
-	 *			  have meaning
-	 * 3: ADM subchannel:	  Only sch_val, st and sch
-	 *			  have meaning
-	 *
-	 * Other types are currently undefined.
-	 */
-	if (ssd_area->st > 3) { /* uhm, that looks strange... */
-		CIO_CRW_EVENT(0, "Strange subchannel type %d"
-			      " for sch 0.%x.%04x\n", ssd_area->st,
-			      sch->schid.ssid, sch->schid.sch_no);
-		/*
-		 * There may have been a new subchannel type defined in the
-		 * time since this code was written; since we don't know which
-		 * fields have meaning and what to do with it we just jump out
-		 */
-		return 0;
-	} else {
-		const char *type[4] = {"I/O", "chsc", "message", "ADM"};
-		CIO_CRW_EVENT(6, "ssd: sch 0.%x.%04x is %s subchannel\n",
-			      sch->schid.ssid, sch->schid.sch_no,
-			      type[ssd_area->st]);
-
-		sch->ssd_info.valid = 1;
-		sch->ssd_info.type = ssd_area->st;
+	if (!ssd_area->sch_valid) {
+		ret = -ENODEV;
+		goto out_free;
 	}
-
-	if (ssd_area->st == 0 || ssd_area->st == 2) {
-		for (j = 0; j < 8; j++) {
-			if (!((0x80 >> j) & ssd_area->path_mask &
-			      ssd_area->fla_valid_mask))
-				continue;
-			sch->ssd_info.chpid[j] = ssd_area->chpid[j];
-			sch->ssd_info.fla[j]   = ssd_area->fla[j];
+	/* Copy data */
+	ret = 0;
+	memset(ssd, 0, sizeof(struct chsc_ssd_info));
+	if ((ssd_area->st != 0) && (ssd_area->st != 2))
+		goto out_free;
+	ssd->path_mask = ssd_area->path_mask;
+	ssd->fla_valid_mask = ssd_area->fla_valid_mask;
+	for (i = 0; i < 8; i++) {
+		mask = 0x80 >> i;
+		if (ssd_area->path_mask & mask) {
+			chp_id_init(&ssd->chpid[i]);
+			ssd->chpid[i].id = ssd_area->chpid[i];
 		}
+		if (ssd_area->fla_valid_mask & mask)
+			ssd->fla[i] = ssd_area->fla[i];
 	}
-	return 0;
+out_free:
+	free_page(page);
+	return ret;
 }
 
-int
-css_get_ssd_info(struct subchannel *sch)
+static int check_for_io_on_path(struct subchannel *sch, int mask)
 {
-	int ret;
-	void *page;
+	int cc;
 
-	page = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
-	if (!page)
-		return -ENOMEM;
-	spin_lock_irq(sch->lock);
-	ret = chsc_get_sch_desc_irq(sch, page);
-	if (ret) {
-		static int cio_chsc_err_msg;
-		
-		if (!cio_chsc_err_msg) {
-			printk(KERN_ERR
-			       "chsc_get_sch_descriptions:"
-			       " Error %d while doing chsc; "
-			       "processing some machine checks may "
-			       "not work\n", ret);
-			cio_chsc_err_msg = 1;
-		}
-	}
-	spin_unlock_irq(sch->lock);
-	free_page((unsigned long)page);
-	if (!ret) {
-		int j, chpid, mask;
-		/* Allocate channel path structures, if needed. */
-		for (j = 0; j < 8; j++) {
-			mask = 0x80 >> j;
-			chpid = sch->ssd_info.chpid[j];
-			if ((sch->schib.pmcw.pim & mask) &&
-			    (get_chp_status(chpid) < 0))
-			    new_channel_path(chpid);
-		}
+	cc = stsch(sch->schid, &sch->schib);
+	if (cc)
+		return 0;
+	if (sch->schib.scsw.actl && sch->schib.pmcw.lpum == mask)
+		return 1;
+	return 0;
+}
+
+static void terminate_internal_io(struct subchannel *sch)
+{
+	if (cio_clear(sch)) {
+		/* Recheck device in case clear failed. */
+		sch->lpm = 0;
+		if (device_trigger_verify(sch) != 0)
+			css_schedule_eval(sch->schid);
+		return;
 	}
-	return ret;
+	/* Request retry of internal operation. */
+	device_set_intretry(sch);
+	/* Call handler. */
+	if (sch->driver && sch->driver->termination)
+		sch->driver->termination(&sch->dev);
 }
 
 static int
@@ -219,7 +141,7 @@ s390_subchannel_remove_chpid(struct device *dev, void *data)
 	int j;
 	int mask;
 	struct subchannel *sch;
-	struct channel_path *chpid;
+	struct chp_id *chpid;
 	struct schib schib;
 
 	sch = to_subchannel(dev);
@@ -243,106 +165,50 @@ s390_subchannel_remove_chpid(struct device *dev, void *data)
 	if (sch->schib.pmcw.pim == 0x80)
 		goto out_unreg;
 
-	if ((sch->schib.scsw.actl & SCSW_ACTL_DEVACT) &&
-	    (sch->schib.scsw.actl & SCSW_ACTL_SCHACT) &&
-	    (sch->schib.pmcw.lpum == mask)) {
-		int cc;
-
-		cc = cio_clear(sch);
-		if (cc == -ENODEV)
+	if (check_for_io_on_path(sch, mask)) {
+		if (device_is_online(sch))
+			device_kill_io(sch);
+		else {
+			terminate_internal_io(sch);
+			/* Re-start path verification. */
+			if (sch->driver && sch->driver->verify)
+				sch->driver->verify(&sch->dev);
+		}
+	} else {
+		/* trigger path verification. */
+		if (sch->driver && sch->driver->verify)
+			sch->driver->verify(&sch->dev);
+		else if (sch->lpm == mask)
 			goto out_unreg;
-		/* Request retry of internal operation. */
-		device_set_intretry(sch);
-		/* Call handler. */
-		if (sch->driver && sch->driver->termination)
-			sch->driver->termination(&sch->dev);
-		goto out_unlock;
 	}
 
-	/* trigger path verification. */
-	if (sch->driver && sch->driver->verify)
-		sch->driver->verify(&sch->dev);
-	else if (sch->lpm == mask)
-		goto out_unreg;
-out_unlock:
 	spin_unlock_irq(sch->lock);
 	return 0;
+
 out_unreg:
-	spin_unlock_irq(sch->lock);
 	sch->lpm = 0;
-	if (css_enqueue_subchannel_slow(sch->schid)) {
-		css_clear_subchannel_slow_list();
-		need_rescan = 1;
-	}
+	spin_unlock_irq(sch->lock);
+	css_schedule_eval(sch->schid);
 	return 0;
 }
 
-static void
-s390_set_chpid_offline( __u8 chpid)
+void chsc_chp_offline(struct chp_id chpid)
 {
 	char dbf_txt[15];
-	struct device *dev;
 
-	sprintf(dbf_txt, "chpr%x", chpid);
+	sprintf(dbf_txt, "chpr%x.%02x", chpid.cssid, chpid.id);
 	CIO_TRACE_EVENT(2, dbf_txt);
 
-	if (get_chp_status(chpid) <= 0)
+	if (chp_get_status(chpid) <= 0)
 		return;
-	dev = get_device(&css[0]->chps[chpid]->dev);
-	bus_for_each_dev(&css_bus_type, NULL, to_channelpath(dev),
+	bus_for_each_dev(&css_bus_type, NULL, &chpid,
 			 s390_subchannel_remove_chpid);
-
-	if (need_rescan || css_slow_subchannels_exist())
-		queue_work(slow_path_wq, &slow_path_work);
-	put_device(dev);
-}
-
-struct res_acc_data {
-	struct channel_path *chp;
-	u32 fla_mask;
-	u16 fla;
-};
-
-static int
-s390_process_res_acc_sch(struct res_acc_data *res_data, struct subchannel *sch)
-{
-	int found;
-	int chp;
-	int ccode;
-	
-	found = 0;
-	for (chp = 0; chp <= 7; chp++)
-		/*
-		 * check if chpid is in information updated by ssd
-		 */
-		if (sch->ssd_info.valid &&
-		    sch->ssd_info.chpid[chp] == res_data->chp->id &&
-		    (sch->ssd_info.fla[chp] & res_data->fla_mask)
-		    == res_data->fla) {
-			found = 1;
-			break;
-		}
-	
-	if (found == 0)
-		return 0;
-
-	/*
-	 * Do a stsch to update our subchannel structure with the
-	 * new path information and eventually check for logically
-	 * offline chpids.
-	 */
-	ccode = stsch(sch->schid, &sch->schib);
-	if (ccode > 0)
-		return 0;
-
-	return 0x80 >> chp;
 }
 
 static int
 s390_process_res_acc_new_sch(struct subchannel_id schid)
 {
 	struct schib schib;
-	int ret;
 	/*
 	 * We don't know the device yet, but since a path
 	 * may be available now to the device we'll have
@@ -353,14 +219,35 @@ s390_process_res_acc_new_sch(struct subchannel_id schid)
 	 */
 	if (stsch_err(schid, &schib))
 		/* We're through */
-		return need_rescan ? -EAGAIN : -ENXIO;
+		return -ENXIO;
 
 	/* Put it on the slow path. */
-	ret = css_enqueue_subchannel_slow(schid);
-	if (ret) {
-		css_clear_subchannel_slow_list();
-		need_rescan = 1;
-		return -EAGAIN;
+	css_schedule_eval(schid);
+	return 0;
+}
+
+struct res_acc_data {
+	struct chp_id chpid;
+	u32 fla_mask;
+	u16 fla;
+};
+
+static int get_res_chpid_mask(struct chsc_ssd_info *ssd,
+			      struct res_acc_data *data)
+{
+	int i;
+	int mask;
+
+	for (i = 0; i < 8; i++) {
+		mask = 0x80 >> i;
+		if (!(ssd->path_mask & mask))
+			continue;
+		if (!chp_id_is_equal(&ssd->chpid[i], &data->chpid))
+			continue;
+		if ((ssd->fla_valid_mask & mask) &&
+		    ((ssd->fla[i] & data->fla_mask) != data->fla))
+			continue;
+		return mask;
 	}
 	return 0;
 }
@@ -379,14 +266,11 @@ __s390_process_res_acc(struct subchannel_id schid, void *data)
 		return s390_process_res_acc_new_sch(schid);
 
 	spin_lock_irq(sch->lock);
-
-	chp_mask = s390_process_res_acc_sch(res_data, sch);
-
-	if (chp_mask == 0) {
-		spin_unlock_irq(sch->lock);
-		put_device(&sch->dev);
-		return 0;
-	}
+	chp_mask = get_res_chpid_mask(&sch->ssd_info, res_data);
+	if (chp_mask == 0)
+		goto out;
+	if (stsch(sch->schid, &sch->schib))
+		goto out;
 	old_lpm = sch->lpm;
 	sch->lpm = ((sch->schib.pmcw.pim &
 		     sch->schib.pmcw.pam &
@@ -396,20 +280,18 @@ __s390_process_res_acc(struct subchannel_id schid, void *data)
 		device_trigger_reprobe(sch);
 	else if (sch->driver && sch->driver->verify)
 		sch->driver->verify(&sch->dev);
-
+out:
 	spin_unlock_irq(sch->lock);
 	put_device(&sch->dev);
 	return 0;
 }
 
-
-static int
-s390_process_res_acc (struct res_acc_data *res_data)
+static void s390_process_res_acc (struct res_acc_data *res_data)
 {
-	int rc;
 	char dbf_txt[15];
 
-	sprintf(dbf_txt, "accpr%x", res_data->chp->id);
+	sprintf(dbf_txt, "accpr%x.%02x", res_data->chpid.cssid,
+		res_data->chpid.id);
 	CIO_TRACE_EVENT( 2, dbf_txt);
 	if (res_data->fla != 0) {
 		sprintf(dbf_txt, "fla%x", res_data->fla);
@@ -423,12 +305,7 @@ s390_process_res_acc (struct res_acc_data *res_data)
 	 * The more information we have (info), the less scanning
 	 * will we have to do.
 	 */
-	rc = for_each_subchannel(__s390_process_res_acc, res_data);
-	if (css_slow_subchannels_exist())
-		rc = -EAGAIN;
-	else if (rc != -EAGAIN)
-		rc = 0;
-	return rc;
+	for_each_subchannel(__s390_process_res_acc, res_data);
 }
 
 static int
@@ -480,43 +357,45 @@ struct chsc_sei_area {
 	/* ccdf has to be big enough for a link-incident record */
 } __attribute__ ((packed));
 
-static int chsc_process_sei_link_incident(struct chsc_sei_area *sei_area)
+static void chsc_process_sei_link_incident(struct chsc_sei_area *sei_area)
 {
-	int chpid;
+	struct chp_id chpid;
+	int id;
 
 	CIO_CRW_EVENT(4, "chsc: link incident (rs=%02x, rs_id=%04x)\n",
 		      sei_area->rs, sei_area->rsid);
 	if (sei_area->rs != 4)
-		return 0;
-	chpid = __get_chpid_from_lir(sei_area->ccdf);
-	if (chpid < 0)
+		return;
+	id = __get_chpid_from_lir(sei_area->ccdf);
+	if (id < 0)
 		CIO_CRW_EVENT(4, "chsc: link incident - invalid LIR\n");
-	else
-		s390_set_chpid_offline(chpid);
-
-	return 0;
+	else {
+		chp_id_init(&chpid);
+		chpid.id = id;
+		chsc_chp_offline(chpid);
+	}
 }
 
-static int chsc_process_sei_res_acc(struct chsc_sei_area *sei_area)
+static void chsc_process_sei_res_acc(struct chsc_sei_area *sei_area)
 {
 	struct res_acc_data res_data;
-	struct device *dev;
+	struct chp_id chpid;
 	int status;
-	int rc;
 
 	CIO_CRW_EVENT(4, "chsc: resource accessibility event (rs=%02x, "
 		      "rs_id=%04x)\n", sei_area->rs, sei_area->rsid);
 	if (sei_area->rs != 4)
-		return 0;
+		return;
+	chp_id_init(&chpid);
+	chpid.id = sei_area->rsid;
 	/* allocate a new channel path structure, if needed */
-	status = get_chp_status(sei_area->rsid);
+	status = chp_get_status(chpid);
 	if (status < 0)
-		new_channel_path(sei_area->rsid);
+		chp_new(chpid);
 	else if (!status)
-		return 0;
-	dev = get_device(&css[0]->chps[sei_area->rsid]->dev);
+		return;
 	memset(&res_data, 0, sizeof(struct res_acc_data));
-	res_data.chp = to_channelpath(dev);
+	res_data.chpid = chpid;
 	if ((sei_area->vf & 0xc0) != 0) {
 		res_data.fla = sei_area->fla;
 		if ((sei_area->vf & 0xc0) == 0xc0)
@@ -526,51 +405,82 @@ static int chsc_process_sei_res_acc(struct chsc_sei_area *sei_area)
 			/* link address */
 			res_data.fla_mask = 0xff00;
 	}
-	rc = s390_process_res_acc(&res_data);
-	put_device(dev);
-
-	return rc;
+	s390_process_res_acc(&res_data);
 }
 
-static int chsc_process_sei(struct chsc_sei_area *sei_area)
+struct chp_config_data {
+	u8 map[32];
+	u8 op;
+	u8 pc;
+};
+
+static void chsc_process_sei_chp_config(struct chsc_sei_area *sei_area)
 {
-	int rc;
+	struct chp_config_data *data;
+	struct chp_id chpid;
+	int num;
+
+	CIO_CRW_EVENT(4, "chsc: channel-path-configuration notification\n");
+	if (sei_area->rs != 0)
+		return;
+	data = (struct chp_config_data *) &(sei_area->ccdf);
+	chp_id_init(&chpid);
+	for (num = 0; num <= __MAX_CHPID; num++) {
+		if (!chp_test_bit(data->map, num))
+			continue;
+		chpid.id = num;
+		printk(KERN_WARNING "cio: processing configure event %d for "
+		       "chpid %x.%02x\n", data->op, chpid.cssid, chpid.id);
+		switch (data->op) {
+		case 0:
+			chp_cfg_schedule(chpid, 1);
+			break;
+		case 1:
+			chp_cfg_schedule(chpid, 0);
+			break;
+		case 2:
+			chp_cfg_cancel_deconfigure(chpid);
+			break;
+		}
+	}
+}
 
+static void chsc_process_sei(struct chsc_sei_area *sei_area)
+{
 	/* Check if we might have lost some information. */
-	if (sei_area->flags & 0x40)
+	if (sei_area->flags & 0x40) {
 		CIO_CRW_EVENT(2, "chsc: event overflow\n");
+		css_schedule_eval_all();
+	}
 	/* which kind of information was stored? */
-	rc = 0;
 	switch (sei_area->cc) {
 	case 1: /* link incident*/
-		rc = chsc_process_sei_link_incident(sei_area);
+		chsc_process_sei_link_incident(sei_area);
 		break;
 	case 2: /* i/o resource accessibiliy */
-		rc = chsc_process_sei_res_acc(sei_area);
+		chsc_process_sei_res_acc(sei_area);
+		break;
+	case 8: /* channel-path-configuration notification */
+		chsc_process_sei_chp_config(sei_area);
 		break;
 	default: /* other stuff */
 		CIO_CRW_EVENT(4, "chsc: unhandled sei content code %d\n",
 			      sei_area->cc);
 		break;
 	}
-
-	return rc;
 }
 
-int chsc_process_crw(void)
+void chsc_process_crw(void)
 {
 	struct chsc_sei_area *sei_area;
-	int ret;
-	int rc;
 
 	if (!sei_page)
-		return 0;
+		return;
 	/* Access to sei_page is serialized through machine check handler
 	 * thread, so no need for locking. */
 	sei_area = sei_page;
 
 	CIO_TRACE_EVENT( 2, "prcss");
-	ret = 0;
 	do {
 		memset(sei_area, 0, sizeof(*sei_area));
 		sei_area->request.length = 0x0010;
@@ -580,37 +490,26 @@ int chsc_process_crw(void)
 
 		if (sei_area->response.code == 0x0001) {
 			CIO_CRW_EVENT(4, "chsc: sei successful\n");
-			rc = chsc_process_sei(sei_area);
-			if (rc)
-				ret = rc;
+			chsc_process_sei(sei_area);
 		} else {
 			CIO_CRW_EVENT(2, "chsc: sei failed (rc=%04x)\n",
 				      sei_area->response.code);
-			ret = 0;
 			break;
 		}
 	} while (sei_area->flags & 0x80);
-
-	return ret;
 }
 
 static int
 __chp_add_new_sch(struct subchannel_id schid)
 {
 	struct schib schib;
-	int ret;
 
 	if (stsch_err(schid, &schib))
 		/* We're through */
-		return need_rescan ? -EAGAIN : -ENXIO;
+		return -ENXIO;
 
 	/* Put it on the slow path. */
-	ret = css_enqueue_subchannel_slow(schid);
-	if (ret) {
-		css_clear_subchannel_slow_list();
-		need_rescan = 1;
-		return -EAGAIN;
-	}
+	css_schedule_eval(schid);
 	return 0;
 }
 
@@ -619,10 +518,10 @@ static int
 __chp_add(struct subchannel_id schid, void *data)
 {
 	int i, mask;
-	struct channel_path *chp;
+	struct chp_id *chpid;
 	struct subchannel *sch;
 
-	chp = data;
+	chpid = data;
 	sch = get_subchannel_by_schid(schid);
 	if (!sch)
 		/* Check if the subchannel is now available. */
@@ -631,7 +530,7 @@ __chp_add(struct subchannel_id schid, void *data)
 	for (i=0; i<8; i++) {
 		mask = 0x80 >> i;
 		if ((sch->schib.pmcw.pim & mask) &&
-		    (sch->schib.pmcw.chpid[i] == chp->id)) {
+		    (sch->schib.pmcw.chpid[i] == chpid->id)) {
 			if (stsch(sch->schid, &sch->schib) != 0) {
 				/* Endgame. */
 				spin_unlock_irq(sch->lock);
@@ -657,122 +556,58 @@ __chp_add(struct subchannel_id schid, void *data)
 	return 0;
 }
 
-static int
-chp_add(int chpid)
+void chsc_chp_online(struct chp_id chpid)
 {
-	int rc;
 	char dbf_txt[15];
-	struct device *dev;
 
-	if (!get_chp_status(chpid))
-		return 0; /* no need to do the rest */
-	
-	sprintf(dbf_txt, "cadd%x", chpid);
+	sprintf(dbf_txt, "cadd%x.%02x", chpid.cssid, chpid.id);
 	CIO_TRACE_EVENT(2, dbf_txt);
 
-	dev = get_device(&css[0]->chps[chpid]->dev);
-	rc = for_each_subchannel(__chp_add, to_channelpath(dev));
-	if (css_slow_subchannels_exist())
-		rc = -EAGAIN;
-	if (rc != -EAGAIN)
-		rc = 0;
-	put_device(dev);
-	return rc;
+	if (chp_get_status(chpid) != 0)
+		for_each_subchannel(__chp_add, &chpid);
 }
 
-/* 
- * Handling of crw machine checks with channel path source.
- */
-int
-chp_process_crw(int chpid, int on)
-{
-	if (on == 0) {
-		/* Path has gone. We use the link incident routine.*/
-		s390_set_chpid_offline(chpid);
-		return 0; /* De-register is async anyway. */
-	}
-	/*
-	 * Path has come. Allocate a new channel path structure,
-	 * if needed.
-	 */
-	if (get_chp_status(chpid) < 0)
-		new_channel_path(chpid);
-	/* Avoid the extra overhead in process_rec_acc. */
-	return chp_add(chpid);
-}
-
-static int check_for_io_on_path(struct subchannel *sch, int index)
-{
-	int cc;
-
-	cc = stsch(sch->schid, &sch->schib);
-	if (cc)
-		return 0;
-	if (sch->schib.scsw.actl && sch->schib.pmcw.lpum == (0x80 >> index))
-		return 1;
-	return 0;
-}
-
-static void terminate_internal_io(struct subchannel *sch)
-{
-	if (cio_clear(sch)) {
-		/* Recheck device in case clear failed. */
-		sch->lpm = 0;
-		if (device_trigger_verify(sch) != 0) {
-			if(css_enqueue_subchannel_slow(sch->schid)) {
-				css_clear_subchannel_slow_list();
-				need_rescan = 1;
-			}
-		}
-		return;
-	}
-	/* Request retry of internal operation. */
-	device_set_intretry(sch);
-	/* Call handler. */
-	if (sch->driver && sch->driver->termination)
-		sch->driver->termination(&sch->dev);
-}
-
-static void
-__s390_subchannel_vary_chpid(struct subchannel *sch, __u8 chpid, int on)
+static void __s390_subchannel_vary_chpid(struct subchannel *sch,
+					 struct chp_id chpid, int on)
 {
 	int chp, old_lpm;
+	int mask;
 	unsigned long flags;
 
-	if (!sch->ssd_info.valid)
-		return;
-	
 	spin_lock_irqsave(sch->lock, flags);
 	old_lpm = sch->lpm;
 	for (chp = 0; chp < 8; chp++) {
-		if (sch->ssd_info.chpid[chp] != chpid)
+		mask = 0x80 >> chp;
+		if (!(sch->ssd_info.path_mask & mask))
+			continue;
+		if (!chp_id_is_equal(&sch->ssd_info.chpid[chp], &chpid))
 			continue;
 
 		if (on) {
-			sch->opm |= (0x80 >> chp);
-			sch->lpm |= (0x80 >> chp);
+			sch->opm |= mask;
+			sch->lpm |= mask;
 			if (!old_lpm)
 				device_trigger_reprobe(sch);
 			else if (sch->driver && sch->driver->verify)
 				sch->driver->verify(&sch->dev);
 			break;
 		}
-		sch->opm &= ~(0x80 >> chp);
-		sch->lpm &= ~(0x80 >> chp);
-		if (check_for_io_on_path(sch, chp)) {
+		sch->opm &= ~mask;
+		sch->lpm &= ~mask;
+		if (check_for_io_on_path(sch, mask)) {
 			if (device_is_online(sch))
 				/* Path verification is done after killing. */
 				device_kill_io(sch);
-			else
+			else {
 				/* Kill and retry internal I/O. */
 				terminate_internal_io(sch);
-		} else if (!sch->lpm) {
-			if (device_trigger_verify(sch) != 0) {
-				if (css_enqueue_subchannel_slow(sch->schid)) {
-					css_clear_subchannel_slow_list();
-					need_rescan = 1;
-				}
+				/* Re-start path verification. */
+				if (sch->driver && sch->driver->verify)
+					sch->driver->verify(&sch->dev);
 			}
+		} else if (!sch->lpm) {
+			if (device_trigger_verify(sch) != 0)
+				css_schedule_eval(sch->schid);
 		} else if (sch->driver && sch->driver->verify)
 			sch->driver->verify(&sch->dev);
 		break;
@@ -780,11 +615,10 @@ __s390_subchannel_vary_chpid(struct subchannel *sch, __u8 chpid, int on)
 	spin_unlock_irqrestore(sch->lock, flags);
 }
 
-static int
-s390_subchannel_vary_chpid_off(struct device *dev, void *data)
+static int s390_subchannel_vary_chpid_off(struct device *dev, void *data)
 {
 	struct subchannel *sch;
-	__u8 *chpid;
+	struct chp_id *chpid;
 
 	sch = to_subchannel(dev);
 	chpid = data;
@@ -793,11 +627,10 @@ s390_subchannel_vary_chpid_off(struct device *dev, void *data)
 	return 0;
 }
 
-static int
-s390_subchannel_vary_chpid_on(struct device *dev, void *data)
+static int s390_subchannel_vary_chpid_on(struct device *dev, void *data)
 {
 	struct subchannel *sch;
-	__u8 *chpid;
+	struct chp_id *chpid;
 
 	sch = to_subchannel(dev);
 	chpid = data;
@@ -821,40 +654,17 @@ __s390_vary_chpid_on(struct subchannel_id schid, void *data)
 		/* We're through */
 		return -ENXIO;
 	/* Put it on the slow path. */
-	if (css_enqueue_subchannel_slow(schid)) {
-		css_clear_subchannel_slow_list();
-		need_rescan = 1;
-		return -EAGAIN;
-	}
+	css_schedule_eval(schid);
 	return 0;
 }
 
-/*
- * Function: s390_vary_chpid
- * Varies the specified chpid online or offline
+/**
+ * chsc_chp_vary - propagate channel-path vary operation to subchannels
+ * @chpid: channl-path ID
+ * @on: non-zero for vary online, zero for vary offline
  */
-static int
-s390_vary_chpid( __u8 chpid, int on)
+int chsc_chp_vary(struct chp_id chpid, int on)
 {
-	char dbf_text[15];
-	int status;
-
-	sprintf(dbf_text, on?"varyon%x":"varyoff%x", chpid);
-	CIO_TRACE_EVENT( 2, dbf_text);
-
-	status = get_chp_status(chpid);
-	if (status < 0) {
-		printk(KERN_ERR "Can't vary unknown chpid %02X\n", chpid);
-		return -EINVAL;
-	}
-
-	if (!on && !status) {
-		printk(KERN_ERR "chpid %x is already offline\n", chpid);
-		return -EINVAL;
-	}
-
-	set_chp_logically_online(chpid, on);
-
 	/*
 	 * Redo PathVerification on the devices the chpid connects to
 	 */
@@ -865,118 +675,9 @@ s390_vary_chpid( __u8 chpid, int on)
 	if (on)
 		/* Scan for new devices on varied on path. */
 		for_each_subchannel(__s390_vary_chpid_on, NULL);
-	if (need_rescan || css_slow_subchannels_exist())
-		queue_work(slow_path_wq, &slow_path_work);
 	return 0;
 }
 
-/*
- * Channel measurement related functions
- */
-static ssize_t
-chp_measurement_chars_read(struct kobject *kobj, char *buf, loff_t off,
-			   size_t count)
-{
-	struct channel_path *chp;
-	unsigned int size;
-
-	chp = to_channelpath(container_of(kobj, struct device, kobj));
-	if (!chp->cmg_chars)
-		return 0;
-
-	size = sizeof(struct cmg_chars);
-
-	if (off > size)
-		return 0;
-	if (off + count > size)
-		count = size - off;
-	memcpy(buf, chp->cmg_chars + off, count);
-	return count;
-}
-
-static struct bin_attribute chp_measurement_chars_attr = {
-	.attr = {
-		.name = "measurement_chars",
-		.mode = S_IRUSR,
-		.owner = THIS_MODULE,
-	},
-	.size = sizeof(struct cmg_chars),
-	.read = chp_measurement_chars_read,
-};
-
-static void
-chp_measurement_copy_block(struct cmg_entry *buf,
-			   struct channel_subsystem *css, int chpid)
-{
-	void *area;
-	struct cmg_entry *entry, reference_buf;
-	int idx;
-
-	if (chpid < 128) {
-		area = css->cub_addr1;
-		idx = chpid;
-	} else {
-		area = css->cub_addr2;
-		idx = chpid - 128;
-	}
-	entry = area + (idx * sizeof(struct cmg_entry));
-	do {
-		memcpy(buf, entry, sizeof(*entry));
-		memcpy(&reference_buf, entry, sizeof(*entry));
-	} while (reference_buf.values[0] != buf->values[0]);
-}
-
-static ssize_t
-chp_measurement_read(struct kobject *kobj, char *buf, loff_t off, size_t count)
-{
-	struct channel_path *chp;
-	struct channel_subsystem *css;
-	unsigned int size;
-
-	chp = to_channelpath(container_of(kobj, struct device, kobj));
-	css = to_css(chp->dev.parent);
-
-	size = sizeof(struct cmg_entry);
-
-	/* Only allow single reads. */
-	if (off || count < size)
-		return 0;
-	chp_measurement_copy_block((struct cmg_entry *)buf, css, chp->id);
-	count = size;
-	return count;
-}
-
-static struct bin_attribute chp_measurement_attr = {
-	.attr = {
-		.name = "measurement",
-		.mode = S_IRUSR,
-		.owner = THIS_MODULE,
-	},
-	.size = sizeof(struct cmg_entry),
-	.read = chp_measurement_read,
-};
-
-static void
-chsc_remove_chp_cmg_attr(struct channel_path *chp)
-{
-	device_remove_bin_file(&chp->dev, &chp_measurement_chars_attr);
-	device_remove_bin_file(&chp->dev, &chp_measurement_attr);
-}
-
-static int
-chsc_add_chp_cmg_attr(struct channel_path *chp)
-{
-	int ret;
-
-	ret = device_create_bin_file(&chp->dev, &chp_measurement_chars_attr);
-	if (ret)
-		return ret;
-	ret = device_create_bin_file(&chp->dev, &chp_measurement_attr);
-	if (ret)
-		device_remove_bin_file(&chp->dev, &chp_measurement_chars_attr);
-	return ret;
-}
-
 static void
 chsc_remove_cmg_attr(struct channel_subsystem *css)
 {
@@ -985,7 +686,7 @@ chsc_remove_cmg_attr(struct channel_subsystem *css)
 	for (i = 0; i <= __MAX_CHPID; i++) {
 		if (!css->chps[i])
 			continue;
-		chsc_remove_chp_cmg_attr(css->chps[i]);
+		chp_remove_cmg_attr(css->chps[i]);
 	}
 }
 
@@ -998,7 +699,7 @@ chsc_add_cmg_attr(struct channel_subsystem *css)
 	for (i = 0; i <= __MAX_CHPID; i++) {
 		if (!css->chps[i])
 			continue;
-		ret = chsc_add_chp_cmg_attr(css->chps[i]);
+		ret = chp_add_cmg_attr(css->chps[i]);
 		if (ret)
 			goto cleanup;
 	}
@@ -1007,12 +708,11 @@ cleanup:
 	for (--i; i >= 0; i--) {
 		if (!css->chps[i])
 			continue;
-		chsc_remove_chp_cmg_attr(css->chps[i]);
+		chp_remove_cmg_attr(css->chps[i]);
 	}
 	return ret;
 }
 
-
 static int
 __chsc_do_secm(struct channel_subsystem *css, int enable, void *page)
 {
@@ -1118,7 +818,7 @@ chsc_secm(struct channel_subsystem *css, int enable)
 		} else
 			chsc_remove_cmg_attr(css);
 	}
-	if (enable && !css->cm_enabled) {
+	if (!css->cm_enabled) {
 		free_page((unsigned long)css->cub_addr1);
 		free_page((unsigned long)css->cub_addr2);
 	}
@@ -1127,109 +827,8 @@ chsc_secm(struct channel_subsystem *css, int enable)
 	return ret;
 }
 
-/*
- * Files for the channel path entries.
- */
-static ssize_t
-chp_status_show(struct device *dev, struct device_attribute *attr, char *buf)
-{
-	struct channel_path *chp = container_of(dev, struct channel_path, dev);
-
-	if (!chp)
-		return 0;
-	return (get_chp_status(chp->id) ? sprintf(buf, "online\n") :
-		sprintf(buf, "offline\n"));
-}
-
-static ssize_t
-chp_status_write(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
-{
-	struct channel_path *cp = container_of(dev, struct channel_path, dev);
-	char cmd[10];
-	int num_args;
-	int error;
-
-	num_args = sscanf(buf, "%5s", cmd);
-	if (!num_args)
-		return count;
-
-	if (!strnicmp(cmd, "on", 2))
-		error = s390_vary_chpid(cp->id, 1);
-	else if (!strnicmp(cmd, "off", 3))
-		error = s390_vary_chpid(cp->id, 0);
-	else
-		error = -EINVAL;
-
-	return error < 0 ? error : count;
-
-}
-
-static DEVICE_ATTR(status, 0644, chp_status_show, chp_status_write);
-
-static ssize_t
-chp_type_show(struct device *dev, struct device_attribute *attr, char *buf)
-{
-	struct channel_path *chp = container_of(dev, struct channel_path, dev);
-
-	if (!chp)
-		return 0;
-	return sprintf(buf, "%x\n", chp->desc.desc);
-}
-
-static DEVICE_ATTR(type, 0444, chp_type_show, NULL);
-
-static ssize_t
-chp_cmg_show(struct device *dev, struct device_attribute *attr, char *buf)
-{
-	struct channel_path *chp = to_channelpath(dev);
-
-	if (!chp)
-		return 0;
-	if (chp->cmg == -1) /* channel measurements not available */
-		return sprintf(buf, "unknown\n");
-	return sprintf(buf, "%x\n", chp->cmg);
-}
-
-static DEVICE_ATTR(cmg, 0444, chp_cmg_show, NULL);
-
-static ssize_t
-chp_shared_show(struct device *dev, struct device_attribute *attr, char *buf)
-{
-	struct channel_path *chp = to_channelpath(dev);
-
-	if (!chp)
-		return 0;
-	if (chp->shared == -1) /* channel measurements not available */
-		return sprintf(buf, "unknown\n");
-	return sprintf(buf, "%x\n", chp->shared);
-}
-
-static DEVICE_ATTR(shared, 0444, chp_shared_show, NULL);
-
-static struct attribute * chp_attrs[] = {
-	&dev_attr_status.attr,
-	&dev_attr_type.attr,
-	&dev_attr_cmg.attr,
-	&dev_attr_shared.attr,
-	NULL,
-};
-
-static struct attribute_group chp_attr_group = {
-	.attrs = chp_attrs,
-};
-
-static void
-chp_release(struct device *dev)
-{
-	struct channel_path *cp;
-	
-	cp = container_of(dev, struct channel_path, dev);
-	kfree(cp);
-}
-
-static int
-chsc_determine_channel_path_description(int chpid,
-					struct channel_path_desc *desc)
+int chsc_determine_channel_path_description(struct chp_id chpid,
+					    struct channel_path_desc *desc)
 {
 	int ccode, ret;
 
@@ -1252,8 +851,8 @@ chsc_determine_channel_path_description(int chpid,
 	scpd_area->request.length = 0x0010;
 	scpd_area->request.code = 0x0002;
 
-	scpd_area->first_chpid = chpid;
-	scpd_area->last_chpid = chpid;
+	scpd_area->first_chpid = chpid.id;
+	scpd_area->last_chpid = chpid.id;
 
 	ccode = chsc(scpd_area);
 	if (ccode > 0) {
@@ -1316,8 +915,7 @@ chsc_initialize_cmg_chars(struct channel_path *chp, u8 cmcv,
 	}
 }
 
-static int
-chsc_get_channel_measurement_chars(struct channel_path *chp)
+int chsc_get_channel_measurement_chars(struct channel_path *chp)
 {
 	int ccode, ret;
 
@@ -1349,8 +947,8 @@ chsc_get_channel_measurement_chars(struct channel_path *chp)
 	scmc_area->request.length = 0x0010;
 	scmc_area->request.code = 0x0022;
 
-	scmc_area->first_chpid = chp->id;
-	scmc_area->last_chpid = chp->id;
+	scmc_area->first_chpid = chp->chpid.id;
+	scmc_area->last_chpid = chp->chpid.id;
 
 	ccode = chsc(scmc_area);
 	if (ccode > 0) {
@@ -1392,94 +990,6 @@ out:
 	return ret;
 }
 
-/*
- * Entries for chpids on the system bus.
- * This replaces /proc/chpids.
- */
-static int
-new_channel_path(int chpid)
-{
-	struct channel_path *chp;
-	int ret;
-
-	chp = kzalloc(sizeof(struct channel_path), GFP_KERNEL);
-	if (!chp)
-		return -ENOMEM;
-
-	/* fill in status, etc. */
-	chp->id = chpid;
-	chp->state = 1;
-	chp->dev.parent = &css[0]->device;
-	chp->dev.release = chp_release;
-	snprintf(chp->dev.bus_id, BUS_ID_SIZE, "chp0.%x", chpid);
-
-	/* Obtain channel path description and fill it in. */
-	ret = chsc_determine_channel_path_description(chpid, &chp->desc);
-	if (ret)
-		goto out_free;
-	/* Get channel-measurement characteristics. */
-	if (css_characteristics_avail && css_chsc_characteristics.scmc
-	    && css_chsc_characteristics.secm) {
-		ret = chsc_get_channel_measurement_chars(chp);
-		if (ret)
-			goto out_free;
-	} else {
-		static int msg_done;
-
-		if (!msg_done) {
-			printk(KERN_WARNING "cio: Channel measurements not "
-			       "available, continuing.\n");
-			msg_done = 1;
-		}
-		chp->cmg = -1;
-	}
-
-	/* make it known to the system */
-	ret = device_register(&chp->dev);
-	if (ret) {
-		printk(KERN_WARNING "%s: could not register %02x\n",
-		       __func__, chpid);
-		goto out_free;
-	}
-	ret = sysfs_create_group(&chp->dev.kobj, &chp_attr_group);
-	if (ret) {
-		device_unregister(&chp->dev);
-		goto out_free;
-	}
-	mutex_lock(&css[0]->mutex);
-	if (css[0]->cm_enabled) {
-		ret = chsc_add_chp_cmg_attr(chp);
-		if (ret) {
-			sysfs_remove_group(&chp->dev.kobj, &chp_attr_group);
-			device_unregister(&chp->dev);
-			mutex_unlock(&css[0]->mutex);
-			goto out_free;
-		}
-	}
-	css[0]->chps[chpid] = chp;
-	mutex_unlock(&css[0]->mutex);
-	return ret;
-out_free:
-	kfree(chp);
-	return ret;
-}
-
-void *
-chsc_get_chp_desc(struct subchannel *sch, int chp_no)
-{
-	struct channel_path *chp;
-	struct channel_path_desc *desc;
-
-	chp = css[0]->chps[sch->schib.pmcw.chpid[chp_no]];
-	if (!chp)
-		return NULL;
-	desc = kmalloc(sizeof(struct channel_path_desc), GFP_KERNEL);
-	if (!desc)
-		return NULL;
-	memcpy(desc, &chp->desc, sizeof(struct channel_path_desc));
-	return desc;
-}
-
 static int __init
 chsc_alloc_sei_area(void)
 {
diff --git a/drivers/s390/cio/chsc.h b/drivers/s390/cio/chsc.h
index 0fb2b024208f..2ad81d11cf7b 100644
--- a/drivers/s390/cio/chsc.h
+++ b/drivers/s390/cio/chsc.h
@@ -1,9 +1,10 @@
 #ifndef S390_CHSC_H
 #define S390_CHSC_H
 
-#define CHSC_SEI_ACC_CHPID        1
-#define CHSC_SEI_ACC_LINKADDR     2
-#define CHSC_SEI_ACC_FULLLINKADDR 3
+#include <linux/types.h>
+#include <linux/device.h>
+#include <asm/chpid.h>
+#include "schid.h"
 
 #define CHSC_SDA_OC_MSS   0x2
 
@@ -33,23 +34,9 @@ struct channel_path_desc {
 	u8 chpp;
 } __attribute__ ((packed));
 
-struct channel_path {
-	int id;
-	int state;
-	struct channel_path_desc desc;
-	/* Channel-measurement related stuff: */
-	int cmg;
-	int shared;
-	void *cmg_chars;
-	struct device dev;
-};
+struct channel_path;
 
-extern void s390_process_css( void );
-extern void chsc_validate_chpids(struct subchannel *);
-extern void chpid_is_actually_online(int);
-extern int css_get_ssd_info(struct subchannel *);
-extern int chsc_process_crw(void);
-extern int chp_process_crw(int, int);
+extern void chsc_process_crw(void);
 
 struct css_general_char {
 	u64 : 41;
@@ -82,15 +69,26 @@ struct css_chsc_char {
 extern struct css_general_char css_general_characteristics;
 extern struct css_chsc_char css_chsc_characteristics;
 
+struct chsc_ssd_info {
+	u8 path_mask;
+	u8 fla_valid_mask;
+	struct chp_id chpid[8];
+	u16 fla[8];
+};
+extern int chsc_get_ssd_info(struct subchannel_id schid,
+			     struct chsc_ssd_info *ssd);
 extern int chsc_determine_css_characteristics(void);
 extern int css_characteristics_avail;
 
-extern void *chsc_get_chp_desc(struct subchannel*, int);
-
 extern int chsc_enable_facility(int);
 struct channel_subsystem;
 extern int chsc_secm(struct channel_subsystem *, int);
 
-#define to_channelpath(device) container_of(device, struct channel_path, dev)
+int chsc_chp_vary(struct chp_id chpid, int on);
+int chsc_determine_channel_path_description(struct chp_id chpid,
+					    struct channel_path_desc *desc);
+void chsc_chp_online(struct chp_id chpid);
+void chsc_chp_offline(struct chp_id chpid);
+int chsc_get_channel_measurement_chars(struct channel_path *chp);
 
 #endif
diff --git a/drivers/s390/cio/cio.c b/drivers/s390/cio/cio.c
index 9cb129ab5be5..ea1defba5693 100644
--- a/drivers/s390/cio/cio.c
+++ b/drivers/s390/cio/cio.c
@@ -22,6 +22,7 @@
 #include <asm/setup.h>
 #include <asm/reset.h>
 #include <asm/ipl.h>
+#include <asm/chpid.h>
 #include "airq.h"
 #include "cio.h"
 #include "css.h"
@@ -29,6 +30,7 @@
 #include "ioasm.h"
 #include "blacklist.h"
 #include "cio_debug.h"
+#include "chp.h"
 #include "../s390mach.h"
 
 debug_info_t *cio_debug_msg_id;
@@ -592,9 +594,10 @@ cio_validate_subchannel (struct subchannel *sch, struct subchannel_id schid)
 		err = -ENODEV;
 		goto out;
 	}
-	sch->opm = 0xff;
-	if (!cio_is_console(sch->schid))
-		chsc_validate_chpids(sch);
+	if (cio_is_console(sch->schid))
+		sch->opm = 0xff;
+	else
+		sch->opm = chp_get_sch_opm(sch);
 	sch->lpm = sch->schib.pmcw.pam & sch->opm;
 
 	CIO_DEBUG(KERN_INFO, 0,
@@ -954,6 +957,7 @@ static void css_reset(void)
 {
 	int i, ret;
 	unsigned long long timeout;
+	struct chp_id chpid;
 
 	/* Reset subchannels. */
 	for_each_subchannel(__shutdown_subchannel_easy,  NULL);
@@ -963,8 +967,10 @@ static void css_reset(void)
 	__ctl_set_bit(14, 28);
 	/* Temporarily reenable machine checks. */
 	local_mcck_enable();
+	chp_id_init(&chpid);
 	for (i = 0; i <= __MAX_CHPID; i++) {
-		ret = rchp(i);
+		chpid.id = i;
+		ret = rchp(chpid);
 		if ((ret == 0) || (ret == 2))
 			/*
 			 * rchp either succeeded, or another rchp is already
@@ -1048,37 +1054,19 @@ void reipl_ccw_dev(struct ccw_dev_id *devid)
 	do_reipl_asm(*((__u32*)&schid));
 }
 
-static struct schib __initdata ipl_schib;
-
-/*
- * ipl_save_parameters gets called very early. It is not allowed to access
- * anything in the bss section at all. The bss section is not cleared yet,
- * but may contain some ipl parameters written by the firmware.
- * These parameters (if present) are copied to 0x2000.
- * To avoid corruption of the ipl parameters, all variables used by this
- * function must reside on the stack or in the data section.
- */
-void ipl_save_parameters(void)
+int __init cio_get_iplinfo(struct cio_iplinfo *iplinfo)
 {
 	struct subchannel_id schid;
-	unsigned int *ipl_ptr;
-	void *src, *dst;
+	struct schib schib;
 
 	schid = *(struct subchannel_id *)__LC_SUBCHANNEL_ID;
 	if (!schid.one)
-		return;
-	if (stsch(schid, &ipl_schib))
-		return;
-	if (!ipl_schib.pmcw.dnv)
-		return;
-	ipl_devno = ipl_schib.pmcw.dev;
-	ipl_flags |= IPL_DEVNO_VALID;
-	if (!ipl_schib.pmcw.qf)
-		return;
-	ipl_flags |= IPL_PARMBLOCK_VALID;
-	ipl_ptr = (unsigned int *)__LC_IPL_PARMBLOCK_PTR;
-	src = (void *)(unsigned long)*ipl_ptr;
-	dst = (void *)IPL_PARMBLOCK_ORIGIN;
-	memmove(dst, src, PAGE_SIZE);
-	*ipl_ptr = IPL_PARMBLOCK_ORIGIN;
+		return -ENODEV;
+	if (stsch(schid, &schib))
+		return -ENODEV;
+	if (!schib.pmcw.dnv)
+		return -ENODEV;
+	iplinfo->devno = schib.pmcw.dev;
+	iplinfo->is_qdio = schib.pmcw.qf;
+	return 0;
 }
diff --git a/drivers/s390/cio/cio.h b/drivers/s390/cio/cio.h
index 35154a210357..7446c39951a7 100644
--- a/drivers/s390/cio/cio.h
+++ b/drivers/s390/cio/cio.h
@@ -1,18 +1,11 @@
 #ifndef S390_CIO_H
 #define S390_CIO_H
 
-#include "schid.h"
 #include <linux/mutex.h>
-
-/*
- * where we put the ssd info
- */
-struct ssd_info {
-	__u8  valid:1;
-	__u8  type:7;		/* subchannel type */
-	__u8  chpid[8];		/* chpids */
-	__u16 fla[8];		/* full link addresses */
-} __attribute__ ((packed));
+#include <linux/device.h>
+#include <asm/chpid.h>
+#include "chsc.h"
+#include "schid.h"
 
 /*
  * path management control word
@@ -108,7 +101,7 @@ struct subchannel {
 	struct schib schib;	/* subchannel information block */
 	struct orb orb;		/* operation request block */
 	struct ccw1 sense_ccw;	/* static ccw for sense command */
-	struct ssd_info ssd_info;	/* subchannel description */
+	struct chsc_ssd_info ssd_info;	/* subchannel description */
 	struct device dev;	/* entry in device tree */
 	struct css_driver *driver;
 } __attribute__ ((aligned(8)));
diff --git a/drivers/s390/cio/cmf.c b/drivers/s390/cio/cmf.c
index 90b22faabbf7..28abd697be1a 100644
--- a/drivers/s390/cio/cmf.c
+++ b/drivers/s390/cio/cmf.c
@@ -476,7 +476,7 @@ struct cmb_area {
 };
 
 static struct cmb_area cmb_area = {
-	.lock = SPIN_LOCK_UNLOCKED,
+	.lock = __SPIN_LOCK_UNLOCKED(cmb_area.lock),
 	.list = LIST_HEAD_INIT(cmb_area.list),
 	.num_channels  = 1024,
 };
diff --git a/drivers/s390/cio/css.c b/drivers/s390/cio/css.c
index fe0ace7aece8..27c6d9e55b23 100644
--- a/drivers/s390/cio/css.c
+++ b/drivers/s390/cio/css.c
@@ -20,8 +20,9 @@
 #include "ioasm.h"
 #include "chsc.h"
 #include "device.h"
+#include "idset.h"
+#include "chp.h"
 
-int need_rescan = 0;
 int css_init_done = 0;
 static int need_reprobe = 0;
 static int max_ssid = 0;
@@ -125,8 +126,52 @@ void css_sch_device_unregister(struct subchannel *sch)
 	mutex_unlock(&sch->reg_mutex);
 }
 
-static int
-css_register_subchannel(struct subchannel *sch)
+static void ssd_from_pmcw(struct chsc_ssd_info *ssd, struct pmcw *pmcw)
+{
+	int i;
+	int mask;
+
+	memset(ssd, 0, sizeof(struct chsc_ssd_info));
+	ssd->path_mask = pmcw->pim;
+	for (i = 0; i < 8; i++) {
+		mask = 0x80 >> i;
+		if (pmcw->pim & mask) {
+			chp_id_init(&ssd->chpid[i]);
+			ssd->chpid[i].id = pmcw->chpid[i];
+		}
+	}
+}
+
+static void ssd_register_chpids(struct chsc_ssd_info *ssd)
+{
+	int i;
+	int mask;
+
+	for (i = 0; i < 8; i++) {
+		mask = 0x80 >> i;
+		if (ssd->path_mask & mask)
+			if (!chp_is_registered(ssd->chpid[i]))
+				chp_new(ssd->chpid[i]);
+	}
+}
+
+void css_update_ssd_info(struct subchannel *sch)
+{
+	int ret;
+
+	if (cio_is_console(sch->schid)) {
+		/* Console is initialized too early for functions requiring
+		 * memory allocation. */
+		ssd_from_pmcw(&sch->ssd_info, &sch->schib.pmcw);
+	} else {
+		ret = chsc_get_ssd_info(sch->schid, &sch->ssd_info);
+		if (ret)
+			ssd_from_pmcw(&sch->ssd_info, &sch->schib.pmcw);
+		ssd_register_chpids(&sch->ssd_info);
+	}
+}
+
+static int css_register_subchannel(struct subchannel *sch)
 {
 	int ret;
 
@@ -135,9 +180,7 @@ css_register_subchannel(struct subchannel *sch)
 	sch->dev.bus = &css_bus_type;
 	sch->dev.release = &css_subchannel_release;
 	sch->dev.groups = subch_attr_groups;
-
-	css_get_ssd_info(sch);
-
+	css_update_ssd_info(sch);
 	/* make it known to the system */
 	ret = css_sch_device_register(sch);
 	if (ret) {
@@ -306,7 +349,7 @@ static int css_evaluate_new_subchannel(struct subchannel_id schid, int slow)
 	return css_probe_device(schid);
 }
 
-static int css_evaluate_subchannel(struct subchannel_id schid, int slow)
+static void css_evaluate_subchannel(struct subchannel_id schid, int slow)
 {
 	struct subchannel *sch;
 	int ret;
@@ -317,53 +360,66 @@ static int css_evaluate_subchannel(struct subchannel_id schid, int slow)
 		put_device(&sch->dev);
 	} else
 		ret = css_evaluate_new_subchannel(schid, slow);
-
-	return ret;
+	if (ret == -EAGAIN)
+		css_schedule_eval(schid);
 }
 
-static int
-css_rescan_devices(struct subchannel_id schid, void *data)
+static struct idset *slow_subchannel_set;
+static spinlock_t slow_subchannel_lock;
+
+static int __init slow_subchannel_init(void)
 {
-	return css_evaluate_subchannel(schid, 1);
+	spin_lock_init(&slow_subchannel_lock);
+	slow_subchannel_set = idset_sch_new();
+	if (!slow_subchannel_set) {
+		printk(KERN_WARNING "cio: could not allocate slow subchannel "
+		       "set\n");
+		return -ENOMEM;
+	}
+	return 0;
 }
 
-struct slow_subchannel {
-	struct list_head slow_list;
-	struct subchannel_id schid;
-};
-
-static LIST_HEAD(slow_subchannels_head);
-static DEFINE_SPINLOCK(slow_subchannel_lock);
+subsys_initcall(slow_subchannel_init);
 
-static void
-css_trigger_slow_path(struct work_struct *unused)
+static void css_slow_path_func(struct work_struct *unused)
 {
-	CIO_TRACE_EVENT(4, "slowpath");
-
-	if (need_rescan) {
-		need_rescan = 0;
-		for_each_subchannel(css_rescan_devices, NULL);
-		return;
-	}
+	struct subchannel_id schid;
 
+	CIO_TRACE_EVENT(4, "slowpath");
 	spin_lock_irq(&slow_subchannel_lock);
-	while (!list_empty(&slow_subchannels_head)) {
-		struct slow_subchannel *slow_sch =
-			list_entry(slow_subchannels_head.next,
-				   struct slow_subchannel, slow_list);
-
-		list_del_init(slow_subchannels_head.next);
+	init_subchannel_id(&schid);
+	while (idset_sch_get_first(slow_subchannel_set, &schid)) {
+		idset_sch_del(slow_subchannel_set, schid);
 		spin_unlock_irq(&slow_subchannel_lock);
-		css_evaluate_subchannel(slow_sch->schid, 1);
+		css_evaluate_subchannel(schid, 1);
 		spin_lock_irq(&slow_subchannel_lock);
-		kfree(slow_sch);
 	}
 	spin_unlock_irq(&slow_subchannel_lock);
 }
 
-DECLARE_WORK(slow_path_work, css_trigger_slow_path);
+static DECLARE_WORK(slow_path_work, css_slow_path_func);
 struct workqueue_struct *slow_path_wq;
 
+void css_schedule_eval(struct subchannel_id schid)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&slow_subchannel_lock, flags);
+	idset_sch_add(slow_subchannel_set, schid);
+	queue_work(slow_path_wq, &slow_path_work);
+	spin_unlock_irqrestore(&slow_subchannel_lock, flags);
+}
+
+void css_schedule_eval_all(void)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&slow_subchannel_lock, flags);
+	idset_fill(slow_subchannel_set);
+	queue_work(slow_path_wq, &slow_path_work);
+	spin_unlock_irqrestore(&slow_subchannel_lock, flags);
+}
+
 /* Reprobe subchannel if unregistered. */
 static int reprobe_subchannel(struct subchannel_id schid, void *data)
 {
@@ -426,33 +482,14 @@ void css_schedule_reprobe(void)
 EXPORT_SYMBOL_GPL(css_schedule_reprobe);
 
 /*
- * Rescan for new devices. FIXME: This is slow.
- * This function is called when we have lost CRWs due to overflows and we have
- * to do subchannel housekeeping.
- */
-void
-css_reiterate_subchannels(void)
-{
-	css_clear_subchannel_slow_list();
-	need_rescan = 1;
-}
-
-/*
  * Called from the machine check handler for subchannel report words.
  */
-int
-css_process_crw(int rsid1, int rsid2)
+void css_process_crw(int rsid1, int rsid2)
 {
-	int ret;
 	struct subchannel_id mchk_schid;
 
 	CIO_CRW_EVENT(2, "source is subchannel %04X, subsystem id %x\n",
 		      rsid1, rsid2);
-
-	if (need_rescan)
-		/* We need to iterate all subchannels anyway. */
-		return -EAGAIN;
-
 	init_subchannel_id(&mchk_schid);
 	mchk_schid.sch_no = rsid1;
 	if (rsid2 != 0)
@@ -463,14 +500,7 @@ css_process_crw(int rsid1, int rsid2)
 	 * use stsch() to find out if the subchannel in question has come
 	 * or gone.
 	 */
-	ret = css_evaluate_subchannel(mchk_schid, 0);
-	if (ret == -EAGAIN) {
-		if (css_enqueue_subchannel_slow(mchk_schid)) {
-			css_clear_subchannel_slow_list();
-			need_rescan = 1;
-		}
-	}
-	return ret;
+	css_evaluate_subchannel(mchk_schid, 0);
 }
 
 static int __init
@@ -745,47 +775,6 @@ struct bus_type css_bus_type = {
 
 subsys_initcall(init_channel_subsystem);
 
-int
-css_enqueue_subchannel_slow(struct subchannel_id schid)
-{
-	struct slow_subchannel *new_slow_sch;
-	unsigned long flags;
-
-	new_slow_sch = kzalloc(sizeof(struct slow_subchannel), GFP_ATOMIC);
-	if (!new_slow_sch)
-		return -ENOMEM;
-	new_slow_sch->schid = schid;
-	spin_lock_irqsave(&slow_subchannel_lock, flags);
-	list_add_tail(&new_slow_sch->slow_list, &slow_subchannels_head);
-	spin_unlock_irqrestore(&slow_subchannel_lock, flags);
-	return 0;
-}
-
-void
-css_clear_subchannel_slow_list(void)
-{
-	unsigned long flags;
-
-	spin_lock_irqsave(&slow_subchannel_lock, flags);
-	while (!list_empty(&slow_subchannels_head)) {
-		struct slow_subchannel *slow_sch =
-			list_entry(slow_subchannels_head.next,
-				   struct slow_subchannel, slow_list);
-
-		list_del_init(slow_subchannels_head.next);
-		kfree(slow_sch);
-	}
-	spin_unlock_irqrestore(&slow_subchannel_lock, flags);
-}
-
-
-
-int
-css_slow_subchannels_exist(void)
-{
-	return (!list_empty(&slow_subchannels_head));
-}
-
 MODULE_LICENSE("GPL");
 EXPORT_SYMBOL(css_bus_type);
 EXPORT_SYMBOL_GPL(css_characteristics_avail);
diff --git a/drivers/s390/cio/css.h b/drivers/s390/cio/css.h
index ca2bab932a8a..71fcfdc42800 100644
--- a/drivers/s390/cio/css.h
+++ b/drivers/s390/cio/css.h
@@ -4,8 +4,11 @@
 #include <linux/mutex.h>
 #include <linux/wait.h>
 #include <linux/workqueue.h>
+#include <linux/device.h>
+#include <linux/types.h>
 
 #include <asm/cio.h>
+#include <asm/chpid.h>
 
 #include "schid.h"
 
@@ -143,13 +146,12 @@ extern void css_sch_device_unregister(struct subchannel *);
 extern struct subchannel * get_subchannel_by_schid(struct subchannel_id);
 extern int css_init_done;
 extern int for_each_subchannel(int(*fn)(struct subchannel_id, void *), void *);
-extern int css_process_crw(int, int);
+extern void css_process_crw(int, int);
 extern void css_reiterate_subchannels(void);
+void css_update_ssd_info(struct subchannel *sch);
 
 #define __MAX_SUBCHANNEL 65535
 #define __MAX_SSID 3
-#define __MAX_CHPID 255
-#define __MAX_CSSID 0
 
 struct channel_subsystem {
 	u8 cssid;
@@ -185,16 +187,12 @@ int device_trigger_verify(struct subchannel *sch);
 void device_kill_pending_timer(struct subchannel *);
 
 /* Helper functions to build lists for the slow path. */
-extern int css_enqueue_subchannel_slow(struct subchannel_id schid);
-void css_walk_subchannel_slow_list(void (*fn)(unsigned long));
-void css_clear_subchannel_slow_list(void);
-int css_slow_subchannels_exist(void);
-extern int need_rescan;
+void css_schedule_eval(struct subchannel_id schid);
+void css_schedule_eval_all(void);
 
 int sch_is_pseudo_sch(struct subchannel *);
 
 extern struct workqueue_struct *slow_path_wq;
-extern struct work_struct slow_path_work;
 
 int subchannel_add_files (struct device *);
 extern struct attribute_group *subch_attr_groups[];
diff --git a/drivers/s390/cio/device.c b/drivers/s390/cio/device.c
index e322111fb369..03355902c582 100644
--- a/drivers/s390/cio/device.c
+++ b/drivers/s390/cio/device.c
@@ -56,13 +56,12 @@ ccw_bus_match (struct device * dev, struct device_driver * drv)
 /* Store modalias string delimited by prefix/suffix string into buffer with
  * specified size. Return length of resulting string (excluding trailing '\0')
  * even if string doesn't fit buffer (snprintf semantics). */
-static int snprint_alias(char *buf, size_t size, const char *prefix,
+static int snprint_alias(char *buf, size_t size,
 			 struct ccw_device_id *id, const char *suffix)
 {
 	int len;
 
-	len = snprintf(buf, size, "%sccw:t%04Xm%02X", prefix, id->cu_type,
-		       id->cu_model);
+	len = snprintf(buf, size, "ccw:t%04Xm%02X", id->cu_type, id->cu_model);
 	if (len > size)
 		return len;
 	buf += len;
@@ -85,53 +84,40 @@ static int ccw_uevent(struct device *dev, char **envp, int num_envp,
 	struct ccw_device *cdev = to_ccwdev(dev);
 	struct ccw_device_id *id = &(cdev->id);
 	int i = 0;
-	int len;
+	int len = 0;
+	int ret;
+	char modalias_buf[30];
 
 	/* CU_TYPE= */
-	len = snprintf(buffer, buffer_size, "CU_TYPE=%04X", id->cu_type) + 1;
-	if (len > buffer_size || i >= num_envp)
-		return -ENOMEM;
-	envp[i++] = buffer;
-	buffer += len;
-	buffer_size -= len;
+	ret = add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &len,
+			     "CU_TYPE=%04X", id->cu_type);
+	if (ret)
+		return ret;
 
 	/* CU_MODEL= */
-	len = snprintf(buffer, buffer_size, "CU_MODEL=%02X", id->cu_model) + 1;
-	if (len > buffer_size || i >= num_envp)
-		return -ENOMEM;
-	envp[i++] = buffer;
-	buffer += len;
-	buffer_size -= len;
+	ret = add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &len,
+			     "CU_MODEL=%02X", id->cu_model);
+	if (ret)
+		return ret;
 
 	/* The next two can be zero, that's ok for us */
 	/* DEV_TYPE= */
-	len = snprintf(buffer, buffer_size, "DEV_TYPE=%04X", id->dev_type) + 1;
-	if (len > buffer_size || i >= num_envp)
-		return -ENOMEM;
-	envp[i++] = buffer;
-	buffer += len;
-	buffer_size -= len;
+	ret = add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &len,
+			     "DEV_TYPE=%04X", id->dev_type);
+	if (ret)
+		return ret;
 
 	/* DEV_MODEL= */
-	len = snprintf(buffer, buffer_size, "DEV_MODEL=%02X",
-			(unsigned char) id->dev_model) + 1;
-	if (len > buffer_size || i >= num_envp)
-		return -ENOMEM;
-	envp[i++] = buffer;
-	buffer += len;
-	buffer_size -= len;
+	ret = add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &len,
+			     "DEV_MODEL=%02X", id->dev_model);
+	if (ret)
+		return ret;
 
 	/* MODALIAS=  */
-	len = snprint_alias(buffer, buffer_size, "MODALIAS=", id, "") + 1;
-	if (len > buffer_size || i >= num_envp)
-		return -ENOMEM;
-	envp[i++] = buffer;
-	buffer += len;
-	buffer_size -= len;
-
-	envp[i] = NULL;
-
-	return 0;
+	snprint_alias(modalias_buf, sizeof(modalias_buf), id, "");
+	ret = add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &len,
+			     "MODALIAS=%s", modalias_buf);
+	return ret;
 }
 
 struct bus_type ccw_bus_type;
@@ -230,12 +216,18 @@ static ssize_t
 chpids_show (struct device * dev, struct device_attribute *attr, char * buf)
 {
 	struct subchannel *sch = to_subchannel(dev);
-	struct ssd_info *ssd = &sch->ssd_info;
+	struct chsc_ssd_info *ssd = &sch->ssd_info;
 	ssize_t ret = 0;
 	int chp;
+	int mask;
 
-	for (chp = 0; chp < 8; chp++)
-		ret += sprintf (buf+ret, "%02x ", ssd->chpid[chp]);
+	for (chp = 0; chp < 8; chp++) {
+		mask = 0x80 >> chp;
+		if (ssd->path_mask & mask)
+			ret += sprintf(buf + ret, "%02x ", ssd->chpid[chp].id);
+		else
+			ret += sprintf(buf + ret, "00 ");
+	}
 	ret += sprintf (buf+ret, "\n");
 	return min((ssize_t)PAGE_SIZE, ret);
 }
@@ -280,7 +272,7 @@ modalias_show (struct device *dev, struct device_attribute *attr, char *buf)
 	struct ccw_device_id *id = &(cdev->id);
 	int len;
 
-	len = snprint_alias(buf, PAGE_SIZE, "", id, "\n") + 1;
+	len = snprint_alias(buf, PAGE_SIZE, id, "\n") + 1;
 
 	return len > PAGE_SIZE ? PAGE_SIZE : len;
 }
@@ -298,16 +290,10 @@ int ccw_device_is_orphan(struct ccw_device *cdev)
 	return sch_is_pseudo_sch(to_subchannel(cdev->dev.parent));
 }
 
-static void ccw_device_unregister(struct work_struct *work)
+static void ccw_device_unregister(struct ccw_device *cdev)
 {
-	struct ccw_device_private *priv;
-	struct ccw_device *cdev;
-
-	priv = container_of(work, struct ccw_device_private, kick_work);
-	cdev = priv->cdev;
 	if (test_and_clear_bit(1, &cdev->private->registered))
-		device_unregister(&cdev->dev);
-	put_device(&cdev->dev);
+		device_del(&cdev->dev);
 }
 
 static void
@@ -324,11 +310,8 @@ ccw_device_remove_disconnected(struct ccw_device *cdev)
 		spin_lock_irqsave(cdev->ccwlock, flags);
 		cdev->private->state = DEV_STATE_NOT_OPER;
 		spin_unlock_irqrestore(cdev->ccwlock, flags);
-		if (get_device(&cdev->dev)) {
-			PREPARE_WORK(&cdev->private->kick_work,
-				     ccw_device_unregister);
-			queue_work(ccw_device_work, &cdev->private->kick_work);
-		}
+		ccw_device_unregister(cdev);
+		put_device(&cdev->dev);
 		return ;
 	}
 	sch = to_subchannel(cdev->dev.parent);
@@ -413,11 +396,60 @@ ccw_device_set_online(struct ccw_device *cdev)
 	return (ret == 0) ? -ENODEV : ret;
 }
 
-static ssize_t
-online_store (struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
+static void online_store_handle_offline(struct ccw_device *cdev)
+{
+	if (cdev->private->state == DEV_STATE_DISCONNECTED)
+		ccw_device_remove_disconnected(cdev);
+	else if (cdev->drv && cdev->drv->set_offline)
+		ccw_device_set_offline(cdev);
+}
+
+static int online_store_recog_and_online(struct ccw_device *cdev)
+{
+	int ret;
+
+	/* Do device recognition, if needed. */
+	if (cdev->id.cu_type == 0) {
+		ret = ccw_device_recognition(cdev);
+		if (ret) {
+			printk(KERN_WARNING"Couldn't start recognition "
+			       "for device %s (ret=%d)\n",
+			       cdev->dev.bus_id, ret);
+			return ret;
+		}
+		wait_event(cdev->private->wait_q,
+			   cdev->private->flags.recog_done);
+	}
+	if (cdev->drv && cdev->drv->set_online)
+		ccw_device_set_online(cdev);
+	return 0;
+}
+static void online_store_handle_online(struct ccw_device *cdev, int force)
+{
+	int ret;
+
+	ret = online_store_recog_and_online(cdev);
+	if (ret)
+		return;
+	if (force && cdev->private->state == DEV_STATE_BOXED) {
+		ret = ccw_device_stlck(cdev);
+		if (ret) {
+			printk(KERN_WARNING"ccw_device_stlck for device %s "
+			       "returned %d!\n", cdev->dev.bus_id, ret);
+			return;
+		}
+		if (cdev->id.cu_type == 0)
+			cdev->private->state = DEV_STATE_NOT_OPER;
+		online_store_recog_and_online(cdev);
+	}
+
+}
+
+static ssize_t online_store (struct device *dev, struct device_attribute *attr,
+			     const char *buf, size_t count)
 {
 	struct ccw_device *cdev = to_ccwdev(dev);
-	int i, force, ret;
+	int i, force;
 	char *tmp;
 
 	if (atomic_cmpxchg(&cdev->private->onoff, 0, 1) != 0)
@@ -434,51 +466,17 @@ online_store (struct device *dev, struct device_attribute *attr, const char *buf
 		force = 0;
 		i = simple_strtoul(buf, &tmp, 16);
 	}
-	if (i == 1) {
-		/* Do device recognition, if needed. */
-		if (cdev->id.cu_type == 0) {
-			ret = ccw_device_recognition(cdev);
-			if (ret) {
-				printk(KERN_WARNING"Couldn't start recognition "
-				       "for device %s (ret=%d)\n",
-				       cdev->dev.bus_id, ret);
-				goto out;
-			}
-			wait_event(cdev->private->wait_q,
-				   cdev->private->flags.recog_done);
-		}
-		if (cdev->drv && cdev->drv->set_online)
-			ccw_device_set_online(cdev);
-	} else if (i == 0) {
-		if (cdev->private->state == DEV_STATE_DISCONNECTED)
-			ccw_device_remove_disconnected(cdev);
-		else if (cdev->drv && cdev->drv->set_offline)
-			ccw_device_set_offline(cdev);
-	}
-	if (force && cdev->private->state == DEV_STATE_BOXED) {
-		ret = ccw_device_stlck(cdev);
-		if (ret) {
-			printk(KERN_WARNING"ccw_device_stlck for device %s "
-			       "returned %d!\n", cdev->dev.bus_id, ret);
-			goto out;
-		}
-		/* Do device recognition, if needed. */
-		if (cdev->id.cu_type == 0) {
-			cdev->private->state = DEV_STATE_NOT_OPER;
-			ret = ccw_device_recognition(cdev);
-			if (ret) {
-				printk(KERN_WARNING"Couldn't start recognition "
-				       "for device %s (ret=%d)\n",
-				       cdev->dev.bus_id, ret);
-				goto out;
-			}
-			wait_event(cdev->private->wait_q,
-				   cdev->private->flags.recog_done);
-		}
-		if (cdev->drv && cdev->drv->set_online)
-			ccw_device_set_online(cdev);
+
+	switch (i) {
+	case 0:
+		online_store_handle_offline(cdev);
+		break;
+	case 1:
+		online_store_handle_online(cdev, force);
+		break;
+	default:
+		count = -EINVAL;
 	}
-	out:
 	if (cdev->drv)
 		module_put(cdev->drv->owner);
 	atomic_set(&cdev->private->onoff, 0);
@@ -548,17 +546,10 @@ static struct attribute_group ccwdev_attr_group = {
 	.attrs = ccwdev_attrs,
 };
 
-static int
-device_add_files (struct device *dev)
-{
-	return sysfs_create_group(&dev->kobj, &ccwdev_attr_group);
-}
-
-static void
-device_remove_files(struct device *dev)
-{
-	sysfs_remove_group(&dev->kobj, &ccwdev_attr_group);
-}
+struct attribute_group *ccwdev_attr_groups[] = {
+	&ccwdev_attr_group,
+	NULL,
+};
 
 /* this is a simple abstraction for device_register that sets the
  * correct bus type and adds the bus specific files */
@@ -573,10 +564,6 @@ static int ccw_device_register(struct ccw_device *cdev)
 		return ret;
 
 	set_bit(1, &cdev->private->registered);
-	if ((ret = device_add_files(dev))) {
-		if (test_and_clear_bit(1, &cdev->private->registered))
-			device_del(dev);
-	}
 	return ret;
 }
 
@@ -648,10 +635,6 @@ ccw_device_add_changed(struct work_struct *work)
 		return;
 	}
 	set_bit(1, &cdev->private->registered);
-	if (device_add_files(&cdev->dev)) {
-		if (test_and_clear_bit(1, &cdev->private->registered))
-			device_unregister(&cdev->dev);
-	}
 }
 
 void ccw_device_do_unreg_rereg(struct work_struct *work)
@@ -664,9 +647,7 @@ void ccw_device_do_unreg_rereg(struct work_struct *work)
 	cdev = priv->cdev;
 	sch = to_subchannel(cdev->dev.parent);
 
-	device_remove_files(&cdev->dev);
-	if (test_and_clear_bit(1, &cdev->private->registered))
-		device_del(&cdev->dev);
+	ccw_device_unregister(cdev);
 	PREPARE_WORK(&cdev->private->kick_work,
 		     ccw_device_add_changed);
 	queue_work(ccw_device_work, &cdev->private->kick_work);
@@ -705,6 +686,7 @@ static int io_subchannel_initialize_dev(struct subchannel *sch,
 	cdev->dev.parent = &sch->dev;
 	cdev->dev.release = ccw_device_release;
 	INIT_LIST_HEAD(&cdev->private->kick_work.entry);
+	cdev->dev.groups = ccwdev_attr_groups;
 	/* Do first half of device_register. */
 	device_initialize(&cdev->dev);
 	if (!get_device(&sch->dev)) {
@@ -736,6 +718,7 @@ static int io_subchannel_recog(struct ccw_device *, struct subchannel *);
 static void sch_attach_device(struct subchannel *sch,
 			      struct ccw_device *cdev)
 {
+	css_update_ssd_info(sch);
 	spin_lock_irq(sch->lock);
 	sch->dev.driver_data = cdev;
 	cdev->private->schid = sch->schid;
@@ -871,7 +854,7 @@ io_subchannel_register(struct work_struct *work)
 	priv = container_of(work, struct ccw_device_private, kick_work);
 	cdev = priv->cdev;
 	sch = to_subchannel(cdev->dev.parent);
-
+	css_update_ssd_info(sch);
 	/*
 	 * io_subchannel_register() will also be called after device
 	 * recognition has been done for a boxed device (which will already
@@ -1133,15 +1116,8 @@ io_subchannel_remove (struct subchannel *sch)
 	sch->dev.driver_data = NULL;
 	cdev->private->state = DEV_STATE_NOT_OPER;
 	spin_unlock_irqrestore(cdev->ccwlock, flags);
-	/*
-	 * Put unregistration on workqueue to avoid livelocks on the css bus
-	 * semaphore.
-	 */
-	if (get_device(&cdev->dev)) {
-		PREPARE_WORK(&cdev->private->kick_work,
-			     ccw_device_unregister);
-		queue_work(ccw_device_work, &cdev->private->kick_work);
-	}
+	ccw_device_unregister(cdev);
+	put_device(&cdev->dev);
 	return 0;
 }
 
diff --git a/drivers/s390/cio/device_fsm.c b/drivers/s390/cio/device_fsm.c
index 089a3ddd6265..898ec3b2bebb 100644
--- a/drivers/s390/cio/device_fsm.c
+++ b/drivers/s390/cio/device_fsm.c
@@ -15,6 +15,7 @@
 
 #include <asm/ccwdev.h>
 #include <asm/cio.h>
+#include <asm/chpid.h>
 
 #include "cio.h"
 #include "cio_debug.h"
@@ -22,6 +23,7 @@
 #include "device.h"
 #include "chsc.h"
 #include "ioasm.h"
+#include "chp.h"
 
 int
 device_is_online(struct subchannel *sch)
@@ -210,14 +212,18 @@ static void
 __recover_lost_chpids(struct subchannel *sch, int old_lpm)
 {
 	int mask, i;
+	struct chp_id chpid;
 
+	chp_id_init(&chpid);
 	for (i = 0; i<8; i++) {
 		mask = 0x80 >> i;
 		if (!(sch->lpm & mask))
 			continue;
 		if (old_lpm & mask)
 			continue;
-		chpid_is_actually_online(sch->schib.pmcw.chpid[i]);
+		chpid.id = sch->schib.pmcw.chpid[i];
+		if (!chp_is_registered(chpid))
+			css_schedule_eval_all();
 	}
 }
 
diff --git a/drivers/s390/cio/device_ops.c b/drivers/s390/cio/device_ops.c
index 7c7775aae38a..16f59fcb66b1 100644
--- a/drivers/s390/cio/device_ops.c
+++ b/drivers/s390/cio/device_ops.c
@@ -16,12 +16,14 @@
 
 #include <asm/ccwdev.h>
 #include <asm/idals.h>
+#include <asm/chpid.h>
 
 #include "cio.h"
 #include "cio_debug.h"
 #include "css.h"
 #include "chsc.h"
 #include "device.h"
+#include "chp.h"
 
 int ccw_device_set_options_mask(struct ccw_device *cdev, unsigned long flags)
 {
@@ -606,9 +608,12 @@ void *
 ccw_device_get_chp_desc(struct ccw_device *cdev, int chp_no)
 {
 	struct subchannel *sch;
+	struct chp_id chpid;
 
 	sch = to_subchannel(cdev->dev.parent);
-	return chsc_get_chp_desc(sch, chp_no);
+	chp_id_init(&chpid);
+	chpid.id = sch->schib.pmcw.chpid[chp_no];
+	return chp_get_chp_desc(chpid);
 }
 
 // FIXME: these have to go:
diff --git a/drivers/s390/cio/idset.c b/drivers/s390/cio/idset.c
new file mode 100644
index 000000000000..16ea828e99f7
--- /dev/null
+++ b/drivers/s390/cio/idset.c
@@ -0,0 +1,112 @@
+/*
+ *  drivers/s390/cio/idset.c
+ *
+ *    Copyright IBM Corp. 2007
+ *    Author(s): Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
+ */
+
+#include <linux/slab.h>
+#include <asm/bitops.h>
+#include "idset.h"
+#include "css.h"
+
+struct idset {
+	int num_ssid;
+	int num_id;
+	unsigned long bitmap[0];
+};
+
+static inline unsigned long bitmap_size(int num_ssid, int num_id)
+{
+	return __BITOPS_WORDS(num_ssid * num_id) * sizeof(unsigned long);
+}
+
+static struct idset *idset_new(int num_ssid, int num_id)
+{
+	struct idset *set;
+
+	set = kzalloc(sizeof(struct idset) + bitmap_size(num_ssid, num_id),
+		      GFP_KERNEL);
+	if (set) {
+		set->num_ssid = num_ssid;
+		set->num_id = num_id;
+	}
+	return set;
+}
+
+void idset_free(struct idset *set)
+{
+	kfree(set);
+}
+
+void idset_clear(struct idset *set)
+{
+	memset(set->bitmap, 0, bitmap_size(set->num_ssid, set->num_id));
+}
+
+void idset_fill(struct idset *set)
+{
+	memset(set->bitmap, 0xff, bitmap_size(set->num_ssid, set->num_id));
+}
+
+static inline void idset_add(struct idset *set, int ssid, int id)
+{
+	set_bit(ssid * set->num_id + id, set->bitmap);
+}
+
+static inline void idset_del(struct idset *set, int ssid, int id)
+{
+	clear_bit(ssid * set->num_id + id, set->bitmap);
+}
+
+static inline int idset_contains(struct idset *set, int ssid, int id)
+{
+	return test_bit(ssid * set->num_id + id, set->bitmap);
+}
+
+static inline int idset_get_first(struct idset *set, int *ssid, int *id)
+{
+	int bitnum;
+
+	bitnum = find_first_bit(set->bitmap, set->num_ssid * set->num_id);
+	if (bitnum >= set->num_ssid * set->num_id)
+		return 0;
+	*ssid = bitnum / set->num_id;
+	*id = bitnum % set->num_id;
+	return 1;
+}
+
+struct idset *idset_sch_new(void)
+{
+	return idset_new(__MAX_SSID + 1, __MAX_SUBCHANNEL + 1);
+}
+
+void idset_sch_add(struct idset *set, struct subchannel_id schid)
+{
+	idset_add(set, schid.ssid, schid.sch_no);
+}
+
+void idset_sch_del(struct idset *set, struct subchannel_id schid)
+{
+	idset_del(set, schid.ssid, schid.sch_no);
+}
+
+int idset_sch_contains(struct idset *set, struct subchannel_id schid)
+{
+	return idset_contains(set, schid.ssid, schid.sch_no);
+}
+
+int idset_sch_get_first(struct idset *set, struct subchannel_id *schid)
+{
+	int ssid = 0;
+	int id = 0;
+	int rc;
+
+	rc = idset_get_first(set, &ssid, &id);
+	if (rc) {
+		init_subchannel_id(schid);
+		schid->ssid = ssid;
+		schid->sch_no = id;
+	}
+	return rc;
+}
diff --git a/drivers/s390/cio/idset.h b/drivers/s390/cio/idset.h
new file mode 100644
index 000000000000..144466ab8c15
--- /dev/null
+++ b/drivers/s390/cio/idset.h
@@ -0,0 +1,25 @@
+/*
+ *  drivers/s390/cio/idset.h
+ *
+ *    Copyright IBM Corp. 2007
+ *    Author(s): Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
+ */
+
+#ifndef S390_IDSET_H
+#define S390_IDSET_H S390_IDSET_H
+
+#include "schid.h"
+
+struct idset;
+
+void idset_free(struct idset *set);
+void idset_clear(struct idset *set);
+void idset_fill(struct idset *set);
+
+struct idset *idset_sch_new(void);
+void idset_sch_add(struct idset *set, struct subchannel_id id);
+void idset_sch_del(struct idset *set, struct subchannel_id id);
+int idset_sch_contains(struct idset *set, struct subchannel_id id);
+int idset_sch_get_first(struct idset *set, struct subchannel_id *id);
+
+#endif /* S390_IDSET_H */
diff --git a/drivers/s390/cio/ioasm.h b/drivers/s390/cio/ioasm.h
index ad6d82940069..7153dd959082 100644
--- a/drivers/s390/cio/ioasm.h
+++ b/drivers/s390/cio/ioasm.h
@@ -1,6 +1,7 @@
 #ifndef S390_CIO_IOASM_H
 #define S390_CIO_IOASM_H
 
+#include <asm/chpid.h>
 #include "schid.h"
 
 /*
@@ -189,9 +190,9 @@ static inline int chsc(void *chsc_area)
 	return cc;
 }
 
-static inline int rchp(int chpid)
+static inline int rchp(struct chp_id chpid)
 {
-	register unsigned int reg1 asm ("1") = chpid;
+	register struct chp_id reg1 asm ("1") = chpid;
 	int ccode;
 
 	asm volatile(
diff --git a/drivers/s390/net/ctcmain.c b/drivers/s390/net/ctcmain.c
index 0d6d5fcc128b..570a960bfb5b 100644
--- a/drivers/s390/net/ctcmain.c
+++ b/drivers/s390/net/ctcmain.c
@@ -1638,21 +1638,19 @@ add_channel(struct ccw_device *cdev, enum channel_types type)
 	struct channel *ch;
 
 	DBF_TEXT(trace, 2, __FUNCTION__);
-	if ((ch =
-	     (struct channel *) kmalloc(sizeof (struct channel),
-					GFP_KERNEL)) == NULL) {
+	ch = kzalloc(sizeof(struct channel), GFP_KERNEL);
+	if (!ch) {
 		ctc_pr_warn("ctc: Out of memory in add_channel\n");
 		return -1;
 	}
-	memset(ch, 0, sizeof (struct channel));
-	if ((ch->ccw = kmalloc(8*sizeof(struct ccw1),
-					       GFP_KERNEL | GFP_DMA)) == NULL) {
+	/* assure all flags and counters are reset */
+	ch->ccw = kzalloc(8 * sizeof(struct ccw1), GFP_KERNEL | GFP_DMA);
+	if (!ch->ccw) {
 		kfree(ch);
 		ctc_pr_warn("ctc: Out of memory in add_channel\n");
 		return -1;
 	}
 
-	memset(ch->ccw, 0, 8*sizeof(struct ccw1));	// assure all flags and counters are reset
 
 	/**
 	 * "static" ccws are used in the following way:
@@ -1692,15 +1690,14 @@ add_channel(struct ccw_device *cdev, enum channel_types type)
 		return -1;
 	}
 	fsm_newstate(ch->fsm, CH_STATE_IDLE);
-	if ((ch->irb = kmalloc(sizeof (struct irb),
-					      GFP_KERNEL)) == NULL) {
+	ch->irb = kzalloc(sizeof(struct irb), GFP_KERNEL);
+	if (!ch->irb) {
 		ctc_pr_warn("ctc: Out of memory in add_channel\n");
 		kfree_fsm(ch->fsm);
 		kfree(ch->ccw);
 		kfree(ch);
 		return -1;
 	}
-	memset(ch->irb, 0, sizeof (struct irb));
 	while (*c && less_than((*c)->id, ch->id))
 		c = &(*c)->next;
 	if (*c && (!strncmp((*c)->id, ch->id, CTC_ID_SIZE))) {
@@ -2745,14 +2742,13 @@ ctc_probe_device(struct ccwgroup_device *cgdev)
 	if (!get_device(&cgdev->dev))
 		return -ENODEV;
 
-	priv = kmalloc(sizeof (struct ctc_priv), GFP_KERNEL);
+	priv = kzalloc(sizeof(struct ctc_priv), GFP_KERNEL);
 	if (!priv) {
 		ctc_pr_err("%s: Out of memory\n", __func__);
 		put_device(&cgdev->dev);
 		return -ENOMEM;
 	}
 
-	memset(priv, 0, sizeof (struct ctc_priv));
 	rc = ctc_add_files(&cgdev->dev);
 	if (rc) {
 		kfree(priv);
@@ -2793,10 +2789,9 @@ ctc_init_netdevice(struct net_device * dev, int alloc_device,
 	DBF_TEXT(setup, 3, __FUNCTION__);
 
 	if (alloc_device) {
-		dev = kmalloc(sizeof (struct net_device), GFP_KERNEL);
+		dev = kzalloc(sizeof(struct net_device), GFP_KERNEL);
 		if (!dev)
 			return NULL;
-		memset(dev, 0, sizeof (struct net_device));
 	}
 
 	dev->priv = privptr;
diff --git a/drivers/s390/s390mach.c b/drivers/s390/s390mach.c
index 806bb1a921eb..644a06eba828 100644
--- a/drivers/s390/s390mach.c
+++ b/drivers/s390/s390mach.c
@@ -21,6 +21,7 @@
 #include "cio/cio.h"
 #include "cio/chsc.h"
 #include "cio/css.h"
+#include "cio/chp.h"
 #include "s390mach.h"
 
 static struct semaphore m_sem;
@@ -44,14 +45,13 @@ static int
 s390_collect_crw_info(void *param)
 {
 	struct crw crw[2];
-	int ccode, ret, slow;
+	int ccode;
 	struct semaphore *sem;
 	unsigned int chain;
 
 	sem = (struct semaphore *)param;
 repeat:
 	down_interruptible(sem);
-	slow = 0;
 	chain = 0;
 	while (1) {
 		if (unlikely(chain > 1)) {
@@ -84,9 +84,8 @@ repeat:
 		/* Check for overflows. */
 		if (crw[chain].oflw) {
 			pr_debug("%s: crw overflow detected!\n", __FUNCTION__);
-			css_reiterate_subchannels();
+			css_schedule_eval_all();
 			chain = 0;
-			slow = 1;
 			continue;
 		}
 		switch (crw[chain].rsc) {
@@ -94,10 +93,7 @@ repeat:
 			if (crw[0].chn && !chain)
 				break;
 			pr_debug("source is subchannel %04X\n", crw[0].rsid);
-			ret = css_process_crw (crw[0].rsid,
-					       chain ? crw[1].rsid : 0);
-			if (ret == -EAGAIN)
-				slow = 1;
+			css_process_crw(crw[0].rsid, chain ? crw[1].rsid : 0);
 			break;
 		case CRW_RSC_MONITOR:
 			pr_debug("source is monitoring facility\n");
@@ -116,28 +112,23 @@ repeat:
 			}
 			switch (crw[0].erc) {
 			case CRW_ERC_IPARM: /* Path has come. */
-				ret = chp_process_crw(crw[0].rsid, 1);
+				chp_process_crw(crw[0].rsid, 1);
 				break;
 			case CRW_ERC_PERRI: /* Path has gone. */
 			case CRW_ERC_PERRN:
-				ret = chp_process_crw(crw[0].rsid, 0);
+				chp_process_crw(crw[0].rsid, 0);
 				break;
 			default:
 				pr_debug("Don't know how to handle erc=%x\n",
 					 crw[0].erc);
-				ret = 0;
 			}
-			if (ret == -EAGAIN)
-				slow = 1;
 			break;
 		case CRW_RSC_CONFIG:
 			pr_debug("source is configuration-alert facility\n");
 			break;
 		case CRW_RSC_CSS:
 			pr_debug("source is channel subsystem\n");
-			ret = chsc_process_crw();
-			if (ret == -EAGAIN)
-				slow = 1;
+			chsc_process_crw();
 			break;
 		default:
 			pr_debug("unknown source\n");
@@ -146,8 +137,6 @@ repeat:
 		/* chain is always 0 or 1 here. */
 		chain = crw[chain].chn ? chain + 1 : 0;
 	}
-	if (slow)
-		queue_work(slow_path_wq, &slow_path_work);
 	goto repeat;
 	return 0;
 }
diff --git a/drivers/s390/sysinfo.c b/drivers/s390/sysinfo.c
index 090743d2f914..19343f9675c3 100644
--- a/drivers/s390/sysinfo.c
+++ b/drivers/s390/sysinfo.c
@@ -357,6 +357,24 @@ static __init int create_proc_sysinfo(void)
 
 __initcall(create_proc_sysinfo);
 
+int get_cpu_capability(unsigned int *capability)
+{
+	struct sysinfo_1_2_2 *info;
+	int rc;
+
+	info = (void *) get_zeroed_page(GFP_KERNEL);
+	if (!info)
+		return -ENOMEM;
+	rc = stsi(info, 1, 2, 2);
+	if (rc == -ENOSYS)
+		goto out;
+	rc = 0;
+	*capability = info->capability;
+out:
+	free_page((unsigned long) info);
+	return rc;
+}
+
 /*
  * CPU capability might have changed. Therefore recalculate loops_per_jiffy.
  */