45 files changed, 1607 insertions, 524 deletions
diff --git a/drivers/s390/block/Kconfig b/drivers/s390/block/Kconfig
index 07883197f474..8e477bb1f3f6 100644
--- a/drivers/s390/block/Kconfig
+++ b/drivers/s390/block/Kconfig
@@ -2,7 +2,8 @@ comment "S/390 block device drivers"
        depends on S390 && BLOCK
 config BLK_DEV_XPRAM
-        tristate "XPRAM disk support"
+        def_tristate m
+        prompt "XPRAM disk support"
        depends on S390 && BLOCK
        help
          Select this option if you want to use your expanded storage on S/390
@@ -12,13 +13,15 @@ config BLK_DEV_XPRAM
          xpram.  If unsure, say "N".
 config DCSSBLK
-        tristate "DCSSBLK support"
+        def_tristate m
+        prompt "DCSSBLK support"
        depends on S390 && BLOCK
        help
          Support for dcss block device
 config DASD
-        tristate "Support for DASD devices"
+        def_tristate y
+        prompt "Support for DASD devices"
        depends on CCW && BLOCK
        select IOSCHED_DEADLINE
        help
@@ -27,28 +30,32 @@ config DASD
          natively on a single image or an LPAR.
 config DASD_PROFILE
-        bool "Profiling support for dasd devices"
+        def_bool y
+        prompt "Profiling support for dasd devices"
        depends on DASD
        help
          Enable this option if you want to see profiling information
          in /proc/dasd/statistics.
 config DASD_ECKD
-        tristate "Support for ECKD Disks"
+        def_tristate y
+        prompt "Support for ECKD Disks"
        depends on DASD
        help
          ECKD devices are the most commonly used devices. You should enable
          this option unless you are very sure to have no ECKD device.
 config DASD_FBA
-        tristate "Support for FBA  Disks"
+        def_tristate y
+        prompt "Support for FBA  Disks"
        depends on DASD
        help
          Select this option to be able to access FBA devices. It is safe to
          say "Y".
 config DASD_DIAG
-        tristate "Support for DIAG access to Disks"
+        def_tristate y
+        prompt "Support for DIAG access to Disks"
        depends on DASD
        help
          Select this option if you want to use Diagnose250 command to access
@@ -56,7 +63,8 @@ config DASD_DIAG
          say "N".
 config DASD_EER
-        bool "Extended error reporting (EER)"
+        def_bool y
+        prompt "Extended error reporting (EER)"
        depends on DASD
        help
          This driver provides a character device interface to the
diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c
index fb613d70c2cb..794bfd962266 100644
--- a/drivers/s390/block/dasd.c
+++ b/drivers/s390/block/dasd.c
@@ -11,6 +11,7 @@
 #define KMSG_COMPONENT "dasd"
 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#include <linux/kernel_stat.h>
 #include <linux/kmod.h>
 #include <linux/init.h>
 #include <linux/interrupt.h>
@@ -368,6 +369,11 @@ dasd_state_ready_to_online(struct dasd_device * device)
        device->state = DASD_STATE_ONLINE;
        if (device->block) {
                dasd_schedule_block_bh(device->block);
+                if ((device->features & DASD_FEATURE_USERAW)) {
+                        disk = device->block->gdp;
+                        kobject_uevent(&disk_to_dev(disk)->kobj, KOBJ_CHANGE);
+                        return 0;
+                }
                disk = device->block->bdev->bd_disk;
                disk_part_iter_init(&piter, disk, DISK_PITER_INCL_PART0);
                while ((part = disk_part_iter_next(&piter)))
@@ -393,7 +399,7 @@ static int dasd_state_online_to_ready(struct dasd_device *device)
                        return rc;
        }
        device->state = DASD_STATE_READY;
-        if (device->block) {
+        if (device->block && !(device->features & DASD_FEATURE_USERAW)) {
                disk = device->block->bdev->bd_disk;
                disk_part_iter_init(&piter, disk, DISK_PITER_INCL_PART0);
                while ((part = disk_part_iter_next(&piter)))
@@ -744,10 +750,6 @@ struct dasd_ccw_req *dasd_smalloc_request(int magic, int cplength,
        char *data;
        int size;
-        /* Sanity checks */
-        BUG_ON(datasize > PAGE_SIZE ||
-             (cplength*sizeof(struct ccw1)) > PAGE_SIZE);
        size = (sizeof(struct dasd_ccw_req) + 7L) & -8L;
        if (cplength > 0)
                size += cplength * sizeof(struct ccw1);
@@ -853,7 +855,6 @@ int dasd_term_IO(struct dasd_ccw_req *cqr)
                rc = ccw_device_clear(device->cdev, (long) cqr);
                switch (rc) {
                case 0: /* termination successful */
-                        cqr->retries--;
                        cqr->status = DASD_CQR_CLEAR_PENDING;
                        cqr->stopclk = get_clock();
                        cqr->starttime = 0;
@@ -905,6 +906,16 @@ int dasd_start_IO(struct dasd_ccw_req *cqr)
                return rc;
        }
        device = (struct dasd_device *) cqr->startdev;
+        if (((cqr->block &&
+              test_bit(DASD_FLAG_LOCK_STOLEN, &cqr->block->base->flags)) ||
+             test_bit(DASD_FLAG_LOCK_STOLEN, &device->flags)) &&
+            !test_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags)) {
+                DBF_DEV_EVENT(DBF_DEBUG, device, "start_IO: return request %p "
+                              "because of stolen lock", cqr);
+                cqr->status = DASD_CQR_ERROR;
+                cqr->intrc = -EPERM;
+                return -EPERM;
+        }
        if (cqr->retries < 0) {
                /* internal error 14 - start_IO run out of retries */
                sprintf(errorstring, "14 %p", cqr);
@@ -916,6 +927,11 @@ int dasd_start_IO(struct dasd_ccw_req *cqr)
        cqr->startclk = get_clock();
        cqr->starttime = jiffies;
        cqr->retries--;
+        if (!test_bit(DASD_CQR_VERIFY_PATH, &cqr->flags)) {
+                cqr->lpm &= device->path_data.opm;
+                if (!cqr->lpm)
+                        cqr->lpm = device->path_data.opm;
+        }
        if (cqr->cpmode == 1) {
                rc = ccw_device_tm_start(device->cdev, cqr->cpaddr,
                                         (long) cqr, cqr->lpm);
@@ -928,35 +944,53 @@ int dasd_start_IO(struct dasd_ccw_req *cqr)
                cqr->status = DASD_CQR_IN_IO;
                break;
        case -EBUSY:
-                DBF_DEV_EVENT(DBF_DEBUG, device, "%s",
+                DBF_DEV_EVENT(DBF_WARNING, device, "%s",
                              "start_IO: device busy, retry later");
                break;
        case -ETIMEDOUT:
-                DBF_DEV_EVENT(DBF_DEBUG, device, "%s",
+                DBF_DEV_EVENT(DBF_WARNING, device, "%s",
                              "start_IO: request timeout, retry later");
                break;
        case -EACCES:
-                /* -EACCES indicates that the request used only a
+                /* -EACCES indicates that the request used only a subset of the
-                 * subset of the available pathes and all these
+                 * available paths and all these paths are gone. If the lpm of
-                 * pathes are gone.
+                 * this request was only a subset of the opm (e.g. the ppm) then
-                 * Do a retry with all available pathes.
+                 * we just do a retry with all available paths.
+                 * If we already use the full opm, something is amiss, and we
+                 * need a full path verification.
                 */
-                cqr->lpm = LPM_ANYPATH;
+                if (test_bit(DASD_CQR_VERIFY_PATH, &cqr->flags)) {
-                DBF_DEV_EVENT(DBF_DEBUG, device, "%s",
+                        DBF_DEV_EVENT(DBF_WARNING, device,
-                              "start_IO: selected pathes gone,"
+                                      "start_IO: selected paths gone (%x)",
-                              " retry on all pathes");
+                                      cqr->lpm);
+                } else if (cqr->lpm != device->path_data.opm) {
+                        cqr->lpm = device->path_data.opm;
+                        DBF_DEV_EVENT(DBF_DEBUG, device, "%s",
+                                      "start_IO: selected paths gone,"
+                                      " retry on all paths");
+                } else {
+                        DBF_DEV_EVENT(DBF_WARNING, device, "%s",
+                                      "start_IO: all paths in opm gone,"
+                                      " do path verification");
+                        dasd_generic_last_path_gone(device);
+                        device->path_data.opm = 0;
+                        device->path_data.ppm = 0;
+                        device->path_data.npm = 0;
+                        device->path_data.tbvpm =
+                                ccw_device_get_path_mask(device->cdev);
+                }
                break;
        case -ENODEV:
-                DBF_DEV_EVENT(DBF_DEBUG, device, "%s",
+                DBF_DEV_EVENT(DBF_WARNING, device, "%s",
                              "start_IO: -ENODEV device gone, retry");
                break;
        case -EIO:
-                DBF_DEV_EVENT(DBF_DEBUG, device, "%s",
+                DBF_DEV_EVENT(DBF_WARNING, device, "%s",
                              "start_IO: -EIO device gone, retry");
                break;
        case -EINVAL:
                /* most likely caused in power management context */
-                DBF_DEV_EVENT(DBF_DEBUG, device, "%s",
+                DBF_DEV_EVENT(DBF_WARNING, device, "%s",
                              "start_IO: -EINVAL device currently "
                              "not accessible");
                break;
@@ -1076,6 +1110,7 @@ void dasd_int_handler(struct ccw_device *cdev, unsigned long intparm,
        unsigned long long now;
        int expires;
+        kstat_cpu(smp_processor_id()).irqs[IOINT_DAS]++;
        if (IS_ERR(irb)) {
                switch (PTR_ERR(irb)) {
                case -EIO:
@@ -1094,16 +1129,11 @@ void dasd_int_handler(struct ccw_device *cdev, unsigned long intparm,
        }
        now = get_clock();
-        /* check for unsolicited interrupts */
        cqr = (struct dasd_ccw_req *) intparm;
-        if (!cqr || ((scsw_cc(&irb->scsw) == 1) &&
+        /* check for conditions that should be handled immediately */
-                     (scsw_fctl(&irb->scsw) & SCSW_FCTL_START_FUNC) &&
+        if (!cqr ||
-                     ((scsw_stctl(&irb->scsw) == SCSW_STCTL_STATUS_PEND) ||
+            !(scsw_dstat(&irb->scsw) == (DEV_STAT_CHN_END | DEV_STAT_DEV_END) &&
-                      (scsw_stctl(&irb->scsw) == (SCSW_STCTL_STATUS_PEND |
+              scsw_cstat(&irb->scsw) == 0)) {
-                                                  SCSW_STCTL_ALERT_STATUS))))) {
-                if (cqr && cqr->status == DASD_CQR_IN_IO)
-                        cqr->status = DASD_CQR_QUEUED;
                if (cqr)
                        memcpy(&cqr->irb, irb, sizeof(*irb));
                device = dasd_device_from_cdev_locked(cdev);
@@ -1114,17 +1144,14 @@ void dasd_int_handler(struct ccw_device *cdev, unsigned long intparm,
                        dasd_put_device(device);
                        return;
                }
-                device->discipline->dump_sense_dbf(device, irb,
+                device->discipline->dump_sense_dbf(device, irb, "int");
-                                                   "unsolicited");
+                if (device->features & DASD_FEATURE_ERPLOG)
-                if ((device->features & DASD_FEATURE_ERPLOG))
+                        device->discipline->dump_sense(device, cqr, irb);
-                        device->discipline->dump_sense(device, cqr,
+                device->discipline->check_for_device_change(device, cqr, irb);
-                                                       irb);
-                dasd_device_clear_timer(device);
-                device->discipline->handle_unsolicited_interrupt(device,
-                                                                 irb);
                dasd_put_device(device);
-                return;
        }
+        if (!cqr)
+                return;
        device = (struct dasd_device *) cqr->startdev;
        if (!device ||
@@ -1164,25 +1191,19 @@ void dasd_int_handler(struct ccw_device *cdev, unsigned long intparm,
                                          struct dasd_ccw_req, devlist);
                }
        } else {  /* error */
-                memcpy(&cqr->irb, irb, sizeof(struct irb));
-                /* log sense for every failed I/O to s390 debugfeature */
-                dasd_log_sense_dbf(cqr, irb);
-                if (device->features & DASD_FEATURE_ERPLOG) {
-                        dasd_log_sense(cqr, irb);
-                }
                /*
                 * If we don't want complex ERP for this request, then just
                 * reset this and retry it in the fastpath
                 */
                if (!test_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags) &&
                    cqr->retries > 0) {
-                        if (cqr->lpm == LPM_ANYPATH)
+                        if (cqr->lpm == device->path_data.opm)
                                DBF_DEV_EVENT(DBF_DEBUG, device,
                                              "default ERP in fastpath "
                                              "(%i retries left)",
                                              cqr->retries);
-                        cqr->lpm    = LPM_ANYPATH;
+                        if (!test_bit(DASD_CQR_VERIFY_PATH, &cqr->flags))
+                                cqr->lpm = device->path_data.opm;
                        cqr->status = DASD_CQR_QUEUED;
                        next = cqr;
                } else
@@ -1210,13 +1231,13 @@ enum uc_todo dasd_generic_uc_handler(struct ccw_device *cdev, struct irb *irb)
                goto out;
        if (test_bit(DASD_FLAG_OFFLINE, &device->flags) ||
           device->state != device->target ||
-           !device->discipline->handle_unsolicited_interrupt){
+           !device->discipline->check_for_device_change){
                dasd_put_device(device);
                goto out;
        }
+        if (device->discipline->dump_sense_dbf)
-        dasd_device_clear_timer(device);
+                device->discipline->dump_sense_dbf(device, irb, "uc");
-        device->discipline->handle_unsolicited_interrupt(device, irb);
+        device->discipline->check_for_device_change(device, NULL, irb);
        dasd_put_device(device);
 out:
        return UC_TODO_RETRY;
@@ -1366,8 +1387,14 @@ static void __dasd_device_start_head(struct dasd_device *device)
        cqr = list_entry(device->ccw_queue.next, struct dasd_ccw_req, devlist);
        if (cqr->status != DASD_CQR_QUEUED)
                return;
-        /* when device is stopped, return request to previous layer */
+        /* when device is stopped, return request to previous layer
-        if (device->stopped) {
+         * exception: only the disconnect or unresumed bits are set and the
+         * cqr is a path verification request
+         */
+        if (device->stopped &&
+            !(!(device->stopped & ~(DASD_STOPPED_DC_WAIT | DASD_UNRESUMED_PM))
+              && test_bit(DASD_CQR_VERIFY_PATH, &cqr->flags))) {
+                cqr->intrc = -EAGAIN;
                cqr->status = DASD_CQR_CLEARED;
                dasd_schedule_device_bh(device);
                return;
@@ -1383,6 +1410,23 @@ static void __dasd_device_start_head(struct dasd_device *device)
                dasd_device_set_timer(device, 50);
 }
+static void __dasd_device_check_path_events(struct dasd_device *device)
+{
+        int rc;
+        if (device->path_data.tbvpm) {
+                if (device->stopped & ~(DASD_STOPPED_DC_WAIT |
+                                        DASD_UNRESUMED_PM))
+                        return;
+                rc = device->discipline->verify_path(
+                        device, device->path_data.tbvpm);
+                if (rc)
+                        dasd_device_set_timer(device, 50);
+                else
+                        device->path_data.tbvpm = 0;
+        }
+};
 /*
 * Go through all request on the dasd_device request queue,
 * terminate them on the cdev if necessary, and return them to the
@@ -1457,6 +1501,7 @@ static void dasd_device_tasklet(struct dasd_device *device)
        __dasd_device_check_expire(device);
        /* find final requests on ccw queue */
        __dasd_device_process_ccw_queue(device, &final_queue);
+        __dasd_device_check_path_events(device);
        spin_unlock_irq(get_ccwdev_lock(device->cdev));
        /* Now call the callback function of requests with final status */
        __dasd_device_process_final_queue(device, &final_queue);
@@ -1613,7 +1658,12 @@ static int _dasd_sleep_on(struct dasd_ccw_req *maincqr, int interruptible)
                        continue;
                if (cqr->status != DASD_CQR_FILLED) /* could be failed */
                        continue;
+                if (test_bit(DASD_FLAG_LOCK_STOLEN, &device->flags) &&
+                    !test_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags)) {
+                        cqr->status = DASD_CQR_FAILED;
+                        cqr->intrc = -EPERM;
+                        continue;
+                }
                /* Non-temporary stop condition will trigger fail fast */
                if (device->stopped & ~DASD_STOPPED_PENDING &&
                    test_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags) &&
@@ -1621,7 +1671,6 @@ static int _dasd_sleep_on(struct dasd_ccw_req *maincqr, int interruptible)
                        cqr->status = DASD_CQR_FAILED;
                        continue;
                }
                /* Don't try to start requests if device is stopped */
                if (interruptible) {
                        rc = wait_event_interruptible(
@@ -1706,13 +1755,18 @@ int dasd_sleep_on_immediatly(struct dasd_ccw_req *cqr)
        int rc;
        device = cqr->startdev;
+        if (test_bit(DASD_FLAG_LOCK_STOLEN, &device->flags) &&
+            !test_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags)) {
+                cqr->status = DASD_CQR_FAILED;
+                cqr->intrc = -EPERM;
+                return -EIO;
+        }
        spin_lock_irq(get_ccwdev_lock(device->cdev));
        rc = _dasd_term_running_cqr(device);
        if (rc) {
                spin_unlock_irq(get_ccwdev_lock(device->cdev));
                return rc;
        }
        cqr->callback = dasd_wakeup_cb;
        cqr->callback_data = DASD_SLEEPON_START_TAG;
        cqr->status = DASD_CQR_QUEUED;
@@ -2016,6 +2070,13 @@ static void __dasd_block_start_head(struct dasd_block *block)
        list_for_each_entry(cqr, &block->ccw_queue, blocklist) {
                if (cqr->status != DASD_CQR_FILLED)
                        continue;
+                if (test_bit(DASD_FLAG_LOCK_STOLEN, &block->base->flags) &&
+                    !test_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags)) {
+                        cqr->status = DASD_CQR_FAILED;
+                        cqr->intrc = -EPERM;
+                        dasd_schedule_block_bh(block);
+                        continue;
+                }
                /* Non-temporary stop condition will trigger fail fast */
                if (block->base->stopped & ~DASD_STOPPED_PENDING &&
                    test_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags) &&
@@ -2201,8 +2262,20 @@ static void dasd_setup_queue(struct dasd_block *block)
 {
        int max;
-        blk_queue_logical_block_size(block->request_queue, block->bp_block);
+        if (block->base->features & DASD_FEATURE_USERAW) {
-        max = block->base->discipline->max_blocks << block->s2b_shift;
+                /*
+                 * the max_blocks value for raw_track access is 256
+                 * it is higher than the native ECKD value because we
+                 * only need one ccw per track
+                 * so the max_hw_sectors are
+                 * 2048 x 512B = 1024kB = 16 tracks
+                 */
+                max = 2048;
+        } else {
+                max = block->base->discipline->max_blocks << block->s2b_shift;
+        }
+        blk_queue_logical_block_size(block->request_queue,
+                                     block->bp_block);
        blk_queue_max_hw_sectors(block->request_queue, max);
        blk_queue_max_segments(block->request_queue, -1L);
        /* with page sized segments we can translate each segement into
@@ -2588,10 +2661,53 @@ int dasd_generic_set_offline(struct ccw_device *cdev)
        return 0;
 }
+int dasd_generic_last_path_gone(struct dasd_device *device)
+{
+        struct dasd_ccw_req *cqr;
+        dev_warn(&device->cdev->dev, "No operational channel path is left "
+                 "for the device\n");
+        DBF_DEV_EVENT(DBF_WARNING, device, "%s", "last path gone");
+        /* First of all call extended error reporting. */
+        dasd_eer_write(device, NULL, DASD_EER_NOPATH);
+        if (device->state < DASD_STATE_BASIC)
+                return 0;
+        /* Device is active. We want to keep it. */
+        list_for_each_entry(cqr, &device->ccw_queue, devlist)
+                if ((cqr->status == DASD_CQR_IN_IO) ||
+                    (cqr->status == DASD_CQR_CLEAR_PENDING)) {
+                        cqr->status = DASD_CQR_QUEUED;
+                        cqr->retries++;
+                }
+        dasd_device_set_stop_bits(device, DASD_STOPPED_DC_WAIT);
+        dasd_device_clear_timer(device);
+        dasd_schedule_device_bh(device);
+        return 1;
+}
+EXPORT_SYMBOL_GPL(dasd_generic_last_path_gone);
+int dasd_generic_path_operational(struct dasd_device *device)
+{
+        dev_info(&device->cdev->dev, "A channel path to the device has become "
+                 "operational\n");
+        DBF_DEV_EVENT(DBF_WARNING, device, "%s", "path operational");
+        dasd_device_remove_stop_bits(device, DASD_STOPPED_DC_WAIT);
+        if (device->stopped & DASD_UNRESUMED_PM) {
+                dasd_device_remove_stop_bits(device, DASD_UNRESUMED_PM);
+                dasd_restore_device(device);
+                return 1;
+        }
+        dasd_schedule_device_bh(device);
+        if (device->block)
+                dasd_schedule_block_bh(device->block);
+        return 1;
+}
+EXPORT_SYMBOL_GPL(dasd_generic_path_operational);
 int dasd_generic_notify(struct ccw_device *cdev, int event)
 {
        struct dasd_device *device;
-        struct dasd_ccw_req *cqr;
        int ret;
        device = dasd_device_from_cdev_locked(cdev);
@@ -2602,41 +2718,64 @@ int dasd_generic_notify(struct ccw_device *cdev, int event)
        case CIO_GONE:
        case CIO_BOXED:
        case CIO_NO_PATH:
-                /* First of all call extended error reporting. */
+                device->path_data.opm = 0;
-                dasd_eer_write(device, NULL, DASD_EER_NOPATH);
+                device->path_data.ppm = 0;
+                device->path_data.npm = 0;
-                if (device->state < DASD_STATE_BASIC)
+                ret = dasd_generic_last_path_gone(device);
-                        break;
-                /* Device is active. We want to keep it. */
-                list_for_each_entry(cqr, &device->ccw_queue, devlist)
-                        if (cqr->status == DASD_CQR_IN_IO) {
-                                cqr->status = DASD_CQR_QUEUED;
-                                cqr->retries++;
-                        }
-                dasd_device_set_stop_bits(device, DASD_STOPPED_DC_WAIT);
-                dasd_device_clear_timer(device);
-                dasd_schedule_device_bh(device);
-                ret = 1;
                break;
        case CIO_OPER:
-                /* FIXME: add a sanity check. */
-                dasd_device_remove_stop_bits(device, DASD_STOPPED_DC_WAIT);
-                if (device->stopped & DASD_UNRESUMED_PM) {
-                        dasd_device_remove_stop_bits(device, DASD_UNRESUMED_PM);
-                        dasd_restore_device(device);
-                        ret = 1;
-                        break;
-                }
-                dasd_schedule_device_bh(device);
-                if (device->block)
-                        dasd_schedule_block_bh(device->block);
                ret = 1;
+                if (device->path_data.opm)
+                        ret = dasd_generic_path_operational(device);
                break;
        }
        dasd_put_device(device);
        return ret;
 }
+void dasd_generic_path_event(struct ccw_device *cdev, int *path_event)
+{
+        int chp;
+        __u8 oldopm, eventlpm;
+        struct dasd_device *device;
+        device = dasd_device_from_cdev_locked(cdev);
+        if (IS_ERR(device))
+                return;
+        for (chp = 0; chp < 8; chp++) {
+                eventlpm = 0x80 >> chp;
+                if (path_event[chp] & PE_PATH_GONE) {
+                        oldopm = device->path_data.opm;
+                        device->path_data.opm &= ~eventlpm;
+                        device->path_data.ppm &= ~eventlpm;
+                        device->path_data.npm &= ~eventlpm;
+                        if (oldopm && !device->path_data.opm)
+                                dasd_generic_last_path_gone(device);
+                }
+                if (path_event[chp] & PE_PATH_AVAILABLE) {
+                        device->path_data.opm &= ~eventlpm;
+                        device->path_data.ppm &= ~eventlpm;
+                        device->path_data.npm &= ~eventlpm;
+                        device->path_data.tbvpm |= eventlpm;
+                        dasd_schedule_device_bh(device);
+                }
+        }
+        dasd_put_device(device);
+}
+EXPORT_SYMBOL_GPL(dasd_generic_path_event);
+int dasd_generic_verify_path(struct dasd_device *device, __u8 lpm)
+{
+        if (!device->path_data.opm && lpm) {
+                device->path_data.opm = lpm;
+                dasd_generic_path_operational(device);
+        } else
+                device->path_data.opm |= lpm;
+        return 0;
+}
+EXPORT_SYMBOL_GPL(dasd_generic_verify_path);
 int dasd_generic_pm_freeze(struct ccw_device *cdev)
 {
        struct dasd_ccw_req *cqr, *n;
@@ -2646,6 +2785,10 @@ int dasd_generic_pm_freeze(struct ccw_device *cdev)
        if (IS_ERR(device))
                return PTR_ERR(device);
+        if (device->discipline->freeze)
+                rc = device->discipline->freeze(device);
        /* disallow new I/O  */
        dasd_device_set_stop_bits(device, DASD_STOPPED_PM);
        /* clear active requests */
@@ -2682,9 +2825,6 @@ int dasd_generic_pm_freeze(struct ccw_device *cdev)
        list_splice_tail(&freeze_queue, &device->ccw_queue);
        spin_unlock_irq(get_ccwdev_lock(cdev));
-        if (device->discipline->freeze)
-                rc = device->discipline->freeze(device);
        dasd_put_device(device);
        return rc;
 }
diff --git a/drivers/s390/block/dasd_3990_erp.c b/drivers/s390/block/dasd_3990_erp.c
index 968c76cf7127..1654a24817be 100644
--- a/drivers/s390/block/dasd_3990_erp.c
+++ b/drivers/s390/block/dasd_3990_erp.c
@@ -152,9 +152,9 @@ dasd_3990_erp_alternate_path(struct dasd_ccw_req * erp)
        spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
        opm = ccw_device_get_path_mask(device->cdev);
        spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
-        //FIXME: start with get_opm ?
        if (erp->lpm == 0)
-                erp->lpm = LPM_ANYPATH & ~(erp->irb.esw.esw0.sublog.lpum);
+                erp->lpm = device->path_data.opm &
+                        ~(erp->irb.esw.esw0.sublog.lpum);
        else
                erp->lpm &= ~(erp->irb.esw.esw0.sublog.lpum);
@@ -270,10 +270,11 @@ static struct dasd_ccw_req *dasd_3990_erp_action_1(struct dasd_ccw_req *erp)
 {
        erp->function = dasd_3990_erp_action_1;
        dasd_3990_erp_alternate_path(erp);
-        if (erp->status == DASD_CQR_FAILED) {
+        if (erp->status == DASD_CQR_FAILED &&
+            !test_bit(DASD_CQR_VERIFY_PATH, &erp->flags)) {
                erp->status = DASD_CQR_FILLED;
                erp->retries = 10;
-                erp->lpm = LPM_ANYPATH;
+                erp->lpm = erp->startdev->path_data.opm;
                erp->function = dasd_3990_erp_action_1_sec;
        }
        return erp;
@@ -1907,15 +1908,14 @@ dasd_3990_erp_compound_retry(struct dasd_ccw_req * erp, char *sense)
 static void
 dasd_3990_erp_compound_path(struct dasd_ccw_req * erp, char *sense)
 {
        if (sense[25] & DASD_SENSE_BIT_3) {
                dasd_3990_erp_alternate_path(erp);
-                if (erp->status == DASD_CQR_FAILED) {
+                if (erp->status == DASD_CQR_FAILED &&
+                    !test_bit(DASD_CQR_VERIFY_PATH, &erp->flags)) {
                        /* reset the lpm and the status to be able to
                         * try further actions. */
+                        erp->lpm = erp->startdev->path_data.opm;
-                        erp->lpm = 0;
                        erp->status = DASD_CQR_NEED_ERP;
                }
        }
diff --git a/drivers/s390/block/dasd_devmap.c b/drivers/s390/block/dasd_devmap.c
index 8d41f3ed38d7..cb6a67bc89ff 100644
--- a/drivers/s390/block/dasd_devmap.c
+++ b/drivers/s390/block/dasd_devmap.c
@@ -208,6 +208,8 @@ dasd_feature_list(char *str, char **endp)
                        features |= DASD_FEATURE_READONLY;
                else if (len == 4 && !strncmp(str, "diag", 4))
                        features |= DASD_FEATURE_USEDIAG;
+                else if (len == 3 && !strncmp(str, "raw", 3))
+                        features |= DASD_FEATURE_USERAW;
                else if (len == 6 && !strncmp(str, "erplog", 6))
                        features |= DASD_FEATURE_ERPLOG;
                else if (len == 8 && !strncmp(str, "failfast", 8))
@@ -639,6 +641,7 @@ dasd_put_device_wake(struct dasd_device *device)
 {
        wake_up(&dasd_delete_wq);
 }
+EXPORT_SYMBOL_GPL(dasd_put_device_wake);
 /*
 * Return dasd_device structure associated with cdev.
@@ -856,7 +859,7 @@ dasd_use_diag_store(struct device *dev, struct device_attribute *attr,
        spin_lock(&dasd_devmap_lock);
        /* Changing diag discipline flag is only allowed in offline state. */
        rc = count;
-        if (!devmap->device) {
+        if (!devmap->device && !(devmap->features & DASD_FEATURE_USERAW)) {
                if (val)
                        devmap->features |= DASD_FEATURE_USEDIAG;
                else
@@ -869,6 +872,56 @@ dasd_use_diag_store(struct device *dev, struct device_attribute *attr,
 static DEVICE_ATTR(use_diag, 0644, dasd_use_diag_show, dasd_use_diag_store);
+/*
+ * use_raw controls whether the driver should give access to raw eckd data or
+ * operate in standard mode
+ */
+static ssize_t
+dasd_use_raw_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+        struct dasd_devmap *devmap;
+        int use_raw;
+        devmap = dasd_find_busid(dev_name(dev));
+        if (!IS_ERR(devmap))
+                use_raw = (devmap->features & DASD_FEATURE_USERAW) != 0;
+        else
+                use_raw = (DASD_FEATURE_DEFAULT & DASD_FEATURE_USERAW) != 0;
+        return sprintf(buf, use_raw ? "1\n" : "0\n");
+}
+static ssize_t
+dasd_use_raw_store(struct device *dev, struct device_attribute *attr,
+                    const char *buf, size_t count)
+{
+        struct dasd_devmap *devmap;
+        ssize_t rc;
+        unsigned long val;
+        devmap = dasd_devmap_from_cdev(to_ccwdev(dev));
+        if (IS_ERR(devmap))
+                return PTR_ERR(devmap);
+        if ((strict_strtoul(buf, 10, &val) != 0) || val > 1)
+                return -EINVAL;
+        spin_lock(&dasd_devmap_lock);
+        /* Changing diag discipline flag is only allowed in offline state. */
+        rc = count;
+        if (!devmap->device && !(devmap->features & DASD_FEATURE_USEDIAG)) {
+                if (val)
+                        devmap->features |= DASD_FEATURE_USERAW;
+                else
+                        devmap->features &= ~DASD_FEATURE_USERAW;
+        } else
+                rc = -EPERM;
+        spin_unlock(&dasd_devmap_lock);
+        return rc;
+}
+static DEVICE_ATTR(raw_track_access, 0644, dasd_use_raw_show,
+                   dasd_use_raw_store);
 static ssize_t
 dasd_discipline_show(struct device *dev, struct device_attribute *attr,
                     char *buf)
@@ -1126,6 +1179,103 @@ dasd_expires_store(struct device *dev, struct device_attribute *attr,
 static DEVICE_ATTR(expires, 0644, dasd_expires_show, dasd_expires_store);
+static ssize_t dasd_reservation_policy_show(struct device *dev,
+                                            struct device_attribute *attr,
+                                            char *buf)
+{
+        struct dasd_devmap *devmap;
+        int rc = 0;
+        devmap = dasd_find_busid(dev_name(dev));
+        if (IS_ERR(devmap)) {
+                rc = snprintf(buf, PAGE_SIZE, "ignore\n");
+        } else {
+                spin_lock(&dasd_devmap_lock);
+                if (devmap->features & DASD_FEATURE_FAILONSLCK)
+                        rc = snprintf(buf, PAGE_SIZE, "fail\n");
+                else
+                        rc = snprintf(buf, PAGE_SIZE, "ignore\n");
+                spin_unlock(&dasd_devmap_lock);
+        }
+        return rc;
+}
+static ssize_t dasd_reservation_policy_store(struct device *dev,
+                                             struct device_attribute *attr,
+                                             const char *buf, size_t count)
+{
+        struct dasd_devmap *devmap;
+        int rc;
+        devmap = dasd_devmap_from_cdev(to_ccwdev(dev));
+        if (IS_ERR(devmap))
+                return PTR_ERR(devmap);
+        rc = 0;
+        spin_lock(&dasd_devmap_lock);
+        if (sysfs_streq("ignore", buf))
+                devmap->features &= ~DASD_FEATURE_FAILONSLCK;
+        else if (sysfs_streq("fail", buf))
+                devmap->features |= DASD_FEATURE_FAILONSLCK;
+        else
+                rc = -EINVAL;
+        if (devmap->device)
+                devmap->device->features = devmap->features;
+        spin_unlock(&dasd_devmap_lock);
+        if (rc)
+                return rc;
+        else
+                return count;
+}
+static DEVICE_ATTR(reservation_policy, 0644,
+                   dasd_reservation_policy_show, dasd_reservation_policy_store);
+static ssize_t dasd_reservation_state_show(struct device *dev,
+                                           struct device_attribute *attr,
+                                           char *buf)
+{
+        struct dasd_device *device;
+        int rc = 0;
+        device = dasd_device_from_cdev(to_ccwdev(dev));
+        if (IS_ERR(device))
+                return snprintf(buf, PAGE_SIZE, "none\n");
+        if (test_bit(DASD_FLAG_IS_RESERVED, &device->flags))
+                rc = snprintf(buf, PAGE_SIZE, "reserved\n");
+        else if (test_bit(DASD_FLAG_LOCK_STOLEN, &device->flags))
+                rc = snprintf(buf, PAGE_SIZE, "lost\n");
+        else
+                rc = snprintf(buf, PAGE_SIZE, "none\n");
+        dasd_put_device(device);
+        return rc;
+}
+static ssize_t dasd_reservation_state_store(struct device *dev,
+                                            struct device_attribute *attr,
+                                            const char *buf, size_t count)
+{
+        struct dasd_device *device;
+        int rc = 0;
+        device = dasd_device_from_cdev(to_ccwdev(dev));
+        if (IS_ERR(device))
+                return -ENODEV;
+        if (sysfs_streq("reset", buf))
+                clear_bit(DASD_FLAG_LOCK_STOLEN, &device->flags);
+        else
+                rc = -EINVAL;
+        dasd_put_device(device);
+        if (rc)
+                return rc;
+        else
+                return count;
+}
+static DEVICE_ATTR(last_known_reservation_state, 0644,
+                   dasd_reservation_state_show, dasd_reservation_state_store);
 static struct attribute * dasd_attrs[] = {
        &dev_attr_readonly.attr,
        &dev_attr_discipline.attr,
@@ -1134,10 +1284,13 @@ static struct attribute * dasd_attrs[] = {
        &dev_attr_vendor.attr,
        &dev_attr_uid.attr,
        &dev_attr_use_diag.attr,
+        &dev_attr_raw_track_access.attr,
        &dev_attr_eer_enabled.attr,
        &dev_attr_erplog.attr,
        &dev_attr_failfast.attr,
        &dev_attr_expires.attr,
+        &dev_attr_reservation_policy.attr,
+        &dev_attr_last_known_reservation_state.attr,
        NULL,
 };
diff --git a/drivers/s390/block/dasd_diag.c b/drivers/s390/block/dasd_diag.c
index 266b34b55403..29143eda9dd9 100644
--- a/drivers/s390/block/dasd_diag.c
+++ b/drivers/s390/block/dasd_diag.c
@@ -10,6 +10,7 @@
 #define KMSG_COMPONENT "dasd"
+#include <linux/kernel_stat.h>
 #include <linux/stddef.h>
 #include <linux/kernel.h>
 #include <linux/slab.h>
@@ -238,6 +239,7 @@ static void dasd_ext_handler(unsigned int ext_int_code,
        addr_t ip;
        int rc;
+        kstat_cpu(smp_processor_id()).irqs[EXTINT_DSD]++;
        switch (ext_int_code >> 24) {
        case DASD_DIAG_CODE_31BIT:
                ip = (addr_t) param32;
@@ -617,6 +619,7 @@ static struct dasd_discipline dasd_diag_discipline = {
        .ebcname = "DIAG",
        .max_blocks = DIAG_MAX_BLOCKS,
        .check_device = dasd_diag_check_device,
+        .verify_path = dasd_generic_verify_path,
        .fill_geometry = dasd_diag_fill_geometry,
        .start_IO = dasd_start_diag,
        .term_IO = dasd_diag_term_IO,
diff --git a/drivers/s390/block/dasd_eckd.c b/drivers/s390/block/dasd_eckd.c
index bf61274af3bb..318672d05563 100644
--- a/drivers/s390/block/dasd_eckd.c
+++ b/drivers/s390/block/dasd_eckd.c
@@ -54,6 +54,15 @@
 #define ECKD_F7(i) (i->factor7)
 #define ECKD_F8(i) (i->factor8)
+/*
+ * raw track access always map to 64k in memory
+ * so it maps to 16 blocks of 4k per track
+ */
+#define DASD_RAW_BLOCK_PER_TRACK 16
+#define DASD_RAW_BLOCKSIZE 4096
+/* 64k are 128 x 512 byte sectors  */
+#define DASD_RAW_SECTORS_PER_TRACK 128
 MODULE_LICENSE("GPL");
 static struct dasd_discipline dasd_eckd_discipline;
@@ -90,6 +99,18 @@ static struct {
 } *dasd_reserve_req;
 static DEFINE_MUTEX(dasd_reserve_mutex);
+/* definitions for the path verification worker */
+struct path_verification_work_data {
+        struct work_struct worker;
+        struct dasd_device *device;
+        struct dasd_ccw_req cqr;
+        struct ccw1 ccw;
+        __u8 rcd_buffer[DASD_ECKD_RCD_DATA_SIZE];
+        int isglobal;
+        __u8 tbvpm;
+};
+static struct path_verification_work_data *path_verification_worker;
+static DEFINE_MUTEX(dasd_path_verification_mutex);
 /* initial attempt at a probe function. this can be simplified once
 * the other detection code is gone */
@@ -373,6 +394,23 @@ static void fill_LRE_data(struct LRE_eckd_data *data, unsigned int trk,
                data->length = reclen;
                data->operation.operation = 0x03;
                break;
+        case DASD_ECKD_CCW_WRITE_FULL_TRACK:
+                data->operation.orientation = 0x0;
+                data->operation.operation = 0x3F;
+                data->extended_operation = 0x11;
+                data->length = 0;
+                data->extended_parameter_length = 0x02;
+                if (data->count > 8) {
+                        data->extended_parameter[0] = 0xFF;
+                        data->extended_parameter[1] = 0xFF;
+                        data->extended_parameter[1] <<= (16 - count);
+                } else {
+                        data->extended_parameter[0] = 0xFF;
+                        data->extended_parameter[0] <<= (8 - count);
+                        data->extended_parameter[1] = 0x00;
+                }
+                data->sector = 0xFF;
+                break;
        case DASD_ECKD_CCW_WRITE_TRACK_DATA:
                data->auxiliary.length_valid = 0x1;
                data->length = reclen;  /* not tlf, as one might think */
@@ -396,6 +434,12 @@ static void fill_LRE_data(struct LRE_eckd_data *data, unsigned int trk,
        case DASD_ECKD_CCW_READ_COUNT:
                data->operation.operation = 0x06;
                break;
+        case DASD_ECKD_CCW_READ_TRACK:
+                data->operation.orientation = 0x1;
+                data->operation.operation = 0x0C;
+                data->extended_parameter_length = 0;
+                data->sector = 0xFF;
+                break;
        case DASD_ECKD_CCW_READ_TRACK_DATA:
                data->auxiliary.length_valid = 0x1;
                data->length = tlf;
@@ -439,10 +483,16 @@ static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata,
        ccw->cmd_code = DASD_ECKD_CCW_PFX;
        ccw->flags = 0;
-        ccw->count = sizeof(*pfxdata);
+        if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) {
-        ccw->cda = (__u32) __pa(pfxdata);
+                ccw->count = sizeof(*pfxdata) + 2;
+                ccw->cda = (__u32) __pa(pfxdata);
+                memset(pfxdata, 0, sizeof(*pfxdata) + 2);
+        } else {
+                ccw->count = sizeof(*pfxdata);
+                ccw->cda = (__u32) __pa(pfxdata);
+                memset(pfxdata, 0, sizeof(*pfxdata));
+        }
-        memset(pfxdata, 0, sizeof(*pfxdata));
        /* prefix data */
        if (format > 1) {
                DBF_DEV_EVENT(DBF_ERR, basedev,
@@ -476,6 +526,7 @@ static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata,
                dedata->mask.perm = 0x1;
                dedata->attributes.operation = basepriv->attrib.operation;
                break;
+        case DASD_ECKD_CCW_READ_TRACK:
        case DASD_ECKD_CCW_READ_TRACK_DATA:
                dedata->mask.perm = 0x1;
                dedata->attributes.operation = basepriv->attrib.operation;
@@ -502,6 +553,11 @@ static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata,
                dedata->attributes.operation = DASD_BYPASS_CACHE;
                rc = check_XRC_on_prefix(pfxdata, basedev);
                break;
+        case DASD_ECKD_CCW_WRITE_FULL_TRACK:
+                dedata->mask.perm = 0x03;
+                dedata->attributes.operation = basepriv->attrib.operation;
+                dedata->blk_size = 0;
+                break;
        case DASD_ECKD_CCW_WRITE_TRACK_DATA:
                dedata->mask.perm = 0x02;
                dedata->attributes.operation = basepriv->attrib.operation;
@@ -755,26 +811,27 @@ static int dasd_eckd_get_uid(struct dasd_device *device, struct dasd_uid *uid)
        return -EINVAL;
 }
-static struct dasd_ccw_req *dasd_eckd_build_rcd_lpm(struct dasd_device *device,
+static void dasd_eckd_fill_rcd_cqr(struct dasd_device *device,
-                                                    void *rcd_buffer,
+                                   struct dasd_ccw_req *cqr,
-                                                    struct ciw *ciw, __u8 lpm)
+                                   __u8 *rcd_buffer,
+                                   __u8 lpm)
 {
-        struct dasd_ccw_req *cqr;
        struct ccw1 *ccw;
+        /*
-        cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */, ciw->count,
+         * buffer has to start with EBCDIC "V1.0" to show
-                                   device);
+         * support for virtual device SNEQ
+         */
-        if (IS_ERR(cqr)) {
+        rcd_buffer[0] = 0xE5;
-                DBF_DEV_EVENT(DBF_WARNING, device, "%s",
+        rcd_buffer[1] = 0xF1;
-                              "Could not allocate RCD request");
+        rcd_buffer[2] = 0x4B;
-                return cqr;
+        rcd_buffer[3] = 0xF0;
-        }
        ccw = cqr->cpaddr;
-        ccw->cmd_code = ciw->cmd;
+        ccw->cmd_code = DASD_ECKD_CCW_RCD;
+        ccw->flags = 0;
        ccw->cda = (__u32)(addr_t)rcd_buffer;
-        ccw->count = ciw->count;
+        ccw->count = DASD_ECKD_RCD_DATA_SIZE;
+        cqr->magic = DASD_ECKD_MAGIC;
        cqr->startdev = device;
        cqr->memdev = device;
@@ -784,7 +841,30 @@ static struct dasd_ccw_req *dasd_eckd_build_rcd_lpm(struct dasd_device *device,
        cqr->retries = 256;
        cqr->buildclk = get_clock();
        cqr->status = DASD_CQR_FILLED;
-        return cqr;
+        set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags);
+}
+static int dasd_eckd_read_conf_immediately(struct dasd_device *device,
+                                           struct dasd_ccw_req *cqr,
+                                           __u8 *rcd_buffer,
+                                           __u8 lpm)
+{
+        struct ciw *ciw;
+        int rc;
+        /*
+         * sanity check: scan for RCD command in extended SenseID data
+         * some devices do not support RCD
+         */
+        ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD);
+        if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD)
+                return -EOPNOTSUPP;
+        dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buffer, lpm);
+        clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
+        set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags);
+        cqr->retries = 5;
+        rc = dasd_sleep_on_immediatly(cqr);
+        return rc;
 }
 static int dasd_eckd_read_conf_lpm(struct dasd_device *device,
@@ -797,32 +877,29 @@ static int dasd_eckd_read_conf_lpm(struct dasd_device *device,
        struct dasd_ccw_req *cqr;
        /*
-         * scan for RCD command in extended SenseID data
+         * sanity check: scan for RCD command in extended SenseID data
+         * some devices do not support RCD
         */
        ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD);
-        if (!ciw || ciw->cmd == 0) {
+        if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) {
                ret = -EOPNOTSUPP;
                goto out_error;
        }
-        rcd_buf = kzalloc(ciw->count, GFP_KERNEL | GFP_DMA);
+        rcd_buf = kzalloc(DASD_ECKD_RCD_DATA_SIZE, GFP_KERNEL | GFP_DMA);
        if (!rcd_buf) {
                ret = -ENOMEM;
                goto out_error;
        }
+        cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */,
-        /*
+                                   0, /* use rcd_buf as data ara */
-         * buffer has to start with EBCDIC "V1.0" to show
+                                   device);
-         * support for virtual device SNEQ
-         */
-        rcd_buf[0] = 0xE5;
-        rcd_buf[1] = 0xF1;
-        rcd_buf[2] = 0x4B;
-        rcd_buf[3] = 0xF0;
-        cqr = dasd_eckd_build_rcd_lpm(device, rcd_buf, ciw, lpm);
        if (IS_ERR(cqr)) {
-                ret =  PTR_ERR(cqr);
+                DBF_DEV_EVENT(DBF_WARNING, device, "%s",
+                              "Could not allocate RCD request");
+                ret = -ENOMEM;
                goto out_error;
        }
+        dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buf, lpm);
        ret = dasd_sleep_on(cqr);
        /*
         * on success we update the user input parms
@@ -831,7 +908,7 @@ static int dasd_eckd_read_conf_lpm(struct dasd_device *device,
        if (ret)
                goto out_error;
-        *rcd_buffer_size = ciw->count;
+        *rcd_buffer_size = DASD_ECKD_RCD_DATA_SIZE;
        *rcd_buffer = rcd_buf;
        return 0;
 out_error:
@@ -901,18 +978,18 @@ static int dasd_eckd_read_conf(struct dasd_device *device)
        void *conf_data;
        int conf_len, conf_data_saved;
        int rc;
-        __u8 lpm;
+        __u8 lpm, opm;
        struct dasd_eckd_private *private;
-        struct dasd_eckd_path *path_data;
+        struct dasd_path *path_data;
        private = (struct dasd_eckd_private *) device->private;
-        path_data = (struct dasd_eckd_path *) &private->path_data;
+        path_data = &device->path_data;
-        path_data->opm = ccw_device_get_path_mask(device->cdev);
+        opm = ccw_device_get_path_mask(device->cdev);
        lpm = 0x80;
        conf_data_saved = 0;
        /* get configuration data per operational path */
        for (lpm = 0x80; lpm; lpm>>= 1) {
-                if (lpm & path_data->opm){
+                if (lpm & opm) {
                        rc = dasd_eckd_read_conf_lpm(device, &conf_data,
                                                     &conf_len, lpm);
                        if (rc && rc != -EOPNOTSUPP) {  /* -EOPNOTSUPP is ok */
@@ -925,6 +1002,8 @@ static int dasd_eckd_read_conf(struct dasd_device *device)
                                DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
                                                "No configuration data "
                                                "retrieved");
+                                /* no further analysis possible */
+                                path_data->opm |= lpm;
                                continue;       /* no error */
                        }
                        /* save first valid configuration data */
@@ -948,6 +1027,7 @@ static int dasd_eckd_read_conf(struct dasd_device *device)
                                path_data->ppm |= lpm;
                                break;
                        }
+                        path_data->opm |= lpm;
                        if (conf_data != private->conf_data)
                                kfree(conf_data);
                }
@@ -955,6 +1035,140 @@ static int dasd_eckd_read_conf(struct dasd_device *device)
        return 0;
 }
+static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm)
+{
+        struct dasd_eckd_private *private;
+        int mdc;
+        u32 fcx_max_data;
+        private = (struct dasd_eckd_private *) device->private;
+        if (private->fcx_max_data) {
+                mdc = ccw_device_get_mdc(device->cdev, lpm);
+                if ((mdc < 0)) {
+                        dev_warn(&device->cdev->dev,
+                                 "Detecting the maximum data size for zHPF "
+                                 "requests failed (rc=%d) for a new path %x\n",
+                                 mdc, lpm);
+                        return mdc;
+                }
+                fcx_max_data = mdc * FCX_MAX_DATA_FACTOR;
+                if (fcx_max_data < private->fcx_max_data) {
+                        dev_warn(&device->cdev->dev,
+                                 "The maximum data size for zHPF requests %u "
+                                 "on a new path %x is below the active maximum "
+                                 "%u\n", fcx_max_data, lpm,
+                                 private->fcx_max_data);
+                        return -EACCES;
+                }
+        }
+        return 0;
+}
+static void do_path_verification_work(struct work_struct *work)
+{
+        struct path_verification_work_data *data;
+        struct dasd_device *device;
+        __u8 lpm, opm, npm, ppm, epm;
+        unsigned long flags;
+        int rc;
+        data = container_of(work, struct path_verification_work_data, worker);
+        device = data->device;
+        opm = 0;
+        npm = 0;
+        ppm = 0;
+        epm = 0;
+        for (lpm = 0x80; lpm; lpm >>= 1) {
+                if (lpm & data->tbvpm) {
+                        memset(data->rcd_buffer, 0, sizeof(data->rcd_buffer));
+                        memset(&data->cqr, 0, sizeof(data->cqr));
+                        data->cqr.cpaddr = &data->ccw;
+                        rc = dasd_eckd_read_conf_immediately(device, &data->cqr,
+                                                             data->rcd_buffer,
+                                                             lpm);
+                        if (!rc) {
+                                switch (dasd_eckd_path_access(data->rcd_buffer,
+                                                     DASD_ECKD_RCD_DATA_SIZE)) {
+                                case 0x02:
+                                        npm |= lpm;
+                                        break;
+                                case 0x03:
+                                        ppm |= lpm;
+                                        break;
+                                }
+                                opm |= lpm;
+                        } else if (rc == -EOPNOTSUPP) {
+                                DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
+                                       "path verification: No configuration "
+                                       "data retrieved");
+                                opm |= lpm;
+                        } else if (rc == -EAGAIN) {
+                                DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
+                                        "path verification: device is stopped,"
+                                        " try again later");
+                                epm |= lpm;
+                        } else {
+                                dev_warn(&device->cdev->dev,
+                                         "Reading device feature codes failed "
+                                         "(rc=%d) for new path %x\n", rc, lpm);
+                                continue;
+                        }
+                        if (verify_fcx_max_data(device, lpm)) {
+                                opm &= ~lpm;
+                                npm &= ~lpm;
+                                ppm &= ~lpm;
+                        }
+                }
+        }
+        /*
+         * There is a small chance that a path is lost again between
+         * above path verification and the following modification of
+         * the device opm mask. We could avoid that race here by using
+         * yet another path mask, but we rather deal with this unlikely
+         * situation in dasd_start_IO.
+         */
+        spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
+        if (!device->path_data.opm && opm) {
+                device->path_data.opm = opm;
+                dasd_generic_path_operational(device);
+        } else
+                device->path_data.opm |= opm;
+        device->path_data.npm |= npm;
+        device->path_data.ppm |= ppm;
+        device->path_data.tbvpm |= epm;
+        spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
+        dasd_put_device(device);
+        if (data->isglobal)
+                mutex_unlock(&dasd_path_verification_mutex);
+        else
+                kfree(data);
+}
+static int dasd_eckd_verify_path(struct dasd_device *device, __u8 lpm)
+{
+        struct path_verification_work_data *data;
+        data = kmalloc(sizeof(*data), GFP_ATOMIC | GFP_DMA);
+        if (!data) {
+                if (mutex_trylock(&dasd_path_verification_mutex)) {
+                        data = path_verification_worker;
+                        data->isglobal = 1;
+                } else
+                        return -ENOMEM;
+        } else {
+                memset(data, 0, sizeof(*data));
+                data->isglobal = 0;
+        }
+        INIT_WORK(&data->worker, do_path_verification_work);
+        dasd_get_device(device);
+        data->device = device;
+        data->tbvpm = lpm;
+        schedule_work(&data->worker);
+        return 0;
+}
 static int dasd_eckd_read_features(struct dasd_device *device)
 {
        struct dasd_psf_prssd_data *prssdp;
@@ -1105,6 +1319,37 @@ static void dasd_eckd_validate_server(struct dasd_device *device)
                        "returned rc=%d", private->uid.ssid, rc);
 }
+static u32 get_fcx_max_data(struct dasd_device *device)
+{
+#if defined(CONFIG_64BIT)
+        int tpm, mdc;
+        int fcx_in_css, fcx_in_gneq, fcx_in_features;
+        struct dasd_eckd_private *private;
+        if (dasd_nofcx)
+                return 0;
+        /* is transport mode supported? */
+        private = (struct dasd_eckd_private *) device->private;
+        fcx_in_css = css_general_characteristics.fcx;
+        fcx_in_gneq = private->gneq->reserved2[7] & 0x04;
+        fcx_in_features = private->features.feature[40] & 0x80;
+        tpm = fcx_in_css && fcx_in_gneq && fcx_in_features;
+        if (!tpm)
+                return 0;
+        mdc = ccw_device_get_mdc(device->cdev, 0);
+        if (mdc < 0) {
+                dev_warn(&device->cdev->dev, "Detecting the maximum supported"
+                         " data size for zHPF requests failed\n");
+                return 0;
+        } else
+                return mdc * FCX_MAX_DATA_FACTOR;
+#else
+        return 0;
+#endif
+}
 /*
 * Check device characteristics.
 * If the device is accessible using ECKD discipline, the device is enabled.
@@ -1223,6 +1468,8 @@ dasd_eckd_check_characteristics(struct dasd_device *device)
        else
                private->real_cyl = private->rdc_data.no_cyl;
+        private->fcx_max_data = get_fcx_max_data(device);
        readonly = dasd_device_is_ro(device);
        if (readonly)
                set_bit(DASD_FLAG_DEVICE_RO, &device->flags);
@@ -1404,6 +1651,13 @@ static int dasd_eckd_end_analysis(struct dasd_block *block)
                dasd_sfree_request(init_cqr, device);
        }
+        if (device->features & DASD_FEATURE_USERAW) {
+                block->bp_block = DASD_RAW_BLOCKSIZE;
+                blk_per_trk = DASD_RAW_BLOCK_PER_TRACK;
+                block->s2b_shift = 3;
+                goto raw;
+        }
        if (status == INIT_CQR_UNFORMATTED) {
                dev_warn(&device->cdev->dev, "The DASD is not formatted\n");
                return -EMEDIUMTYPE;
@@ -1441,6 +1695,7 @@ static int dasd_eckd_end_analysis(struct dasd_block *block)
                        dev_warn(&device->cdev->dev,
                                 "Track 0 has no records following the VTOC\n");
        }
        if (count_area != NULL && count_area->kl == 0) {
                /* we found notthing violating our disk layout */
                if (dasd_check_blocksize(count_area->dl) == 0)
@@ -1456,6 +1711,8 @@ static int dasd_eckd_end_analysis(struct dasd_block *block)
                block->s2b_shift++;
        blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block);
+raw:
        block->blocks = (private->real_cyl *
                          private->rdc_data.trk_per_cyl *
                          blk_per_trk);
@@ -1716,6 +1973,7 @@ static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr)
        if (cqr->block && (cqr->startdev != cqr->block->base)) {
                dasd_eckd_reset_ccw_to_base_io(cqr);
                cqr->startdev = cqr->block->base;
+                cqr->lpm = cqr->block->base->path_data.opm;
        }
 };
@@ -1744,9 +2002,9 @@ dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr)
        return dasd_default_erp_postaction;
 }
+static void dasd_eckd_check_for_device_change(struct dasd_device *device,
-static void dasd_eckd_handle_unsolicited_interrupt(struct dasd_device *device,
+                                              struct dasd_ccw_req *cqr,
-                                                   struct irb *irb)
+                                              struct irb *irb)
 {
        char mask;
        char *sense = NULL;
@@ -1770,40 +2028,41 @@ static void dasd_eckd_handle_unsolicited_interrupt(struct dasd_device *device,
                        /* schedule worker to reload device */
                        dasd_reload_device(device);
                }
                dasd_generic_handle_state_change(device);
                return;
        }
-        /* summary unit check */
        sense = dasd_get_sense(irb);
-        if (sense && (sense[7] == 0x0D) &&
+        if (!sense)
+                return;
+        /* summary unit check */
+        if ((sense[7] == 0x0D) &&
            (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) {
                dasd_alias_handle_summary_unit_check(device, irb);
                return;
        }
        /* service information message SIM */
-        if (sense && !(sense[27] & DASD_SENSE_BIT_0) &&
+        if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) &&
            ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) {
                dasd_3990_erp_handle_sim(device, sense);
-                dasd_schedule_device_bh(device);
                return;
        }
-        if ((scsw_cc(&irb->scsw) == 1) && !sense &&
+        /* loss of device reservation is handled via base devices only
-            (scsw_fctl(&irb->scsw) == SCSW_FCTL_START_FUNC) &&
+         * as alias devices may be used with several bases
-            (scsw_actl(&irb->scsw) == SCSW_ACTL_START_PEND) &&
+         */
-            (scsw_stctl(&irb->scsw) == SCSW_STCTL_STATUS_PEND)) {
+        if (device->block && (sense[7] == 0x3F) &&
-                /* fake irb do nothing, they are handled elsewhere */
+            (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) &&
-                dasd_schedule_device_bh(device);
+            test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) {
-                return;
+                if (device->features & DASD_FEATURE_FAILONSLCK)
+                        set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags);
+                clear_bit(DASD_FLAG_IS_RESERVED, &device->flags);
+                dev_err(&device->cdev->dev,
+                        "The device reservation was lost\n");
        }
+}
-        dasd_schedule_device_bh(device);
-        return;
-};
 static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single(
                                               struct dasd_device *startdev,
@@ -1984,7 +2243,7 @@ static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single(
        cqr->memdev = startdev;
        cqr->block = block;
        cqr->expires = startdev->default_expires * HZ;  /* default 5 minutes */
-        cqr->lpm = private->path_data.ppm;
+        cqr->lpm = startdev->path_data.ppm;
        cqr->retries = 256;
        cqr->buildclk = get_clock();
        cqr->status = DASD_CQR_FILLED;
@@ -2161,7 +2420,7 @@ static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track(
        cqr->memdev = startdev;
        cqr->block = block;
        cqr->expires = startdev->default_expires * HZ;  /* default 5 minutes */
-        cqr->lpm = private->path_data.ppm;
+        cqr->lpm = startdev->path_data.ppm;
        cqr->retries = 256;
        cqr->buildclk = get_clock();
        cqr->status = DASD_CQR_FILLED;
@@ -2326,6 +2585,12 @@ static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track(
        struct tidaw *last_tidaw = NULL;
        int itcw_op;
        size_t itcw_size;
+        u8 tidaw_flags;
+        unsigned int seg_len, part_len, len_to_track_end;
+        unsigned char new_track;
+        sector_t recid, trkid;
+        unsigned int offs;
+        unsigned int count, count_to_trk_end;
        basedev = block->base;
        private = (struct dasd_eckd_private *) basedev->private;
@@ -2341,12 +2606,16 @@ static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track(
        /* trackbased I/O needs address all memory via TIDAWs,
         * not just for 64 bit addresses. This allows us to map
         * each segment directly to one tidaw.
+         * In the case of write requests, additional tidaws may
+         * be needed when a segment crosses a track boundary.
         */
        trkcount = last_trk - first_trk + 1;
        ctidaw = 0;
        rq_for_each_segment(bv, req, iter) {
                ++ctidaw;
        }
+        if (rq_data_dir(req) == WRITE)
+                ctidaw += (last_trk - first_trk);
        /* Allocate the ccw request. */
        itcw_size = itcw_calc_size(0, ctidaw, 0);
@@ -2354,15 +2623,6 @@ static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track(
        if (IS_ERR(cqr))
                return cqr;
-        cqr->cpmode = 1;
-        cqr->startdev = startdev;
-        cqr->memdev = startdev;
-        cqr->block = block;
-        cqr->expires = 100*HZ;
-        cqr->buildclk = get_clock();
-        cqr->status = DASD_CQR_FILLED;
-        cqr->retries = 10;
        /* transfer length factor: how many bytes to read from the last track */
        if (first_trk == last_trk)
                tlf = last_offs - first_offs + 1;
@@ -2371,8 +2631,11 @@ static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track(
        tlf *= blksize;
        itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0);
+        if (IS_ERR(itcw)) {
+                dasd_sfree_request(cqr, startdev);
+                return ERR_PTR(-EINVAL);
+        }
        cqr->cpaddr = itcw_get_tcw(itcw);
        if (prepare_itcw(itcw, first_trk, last_trk,
                         cmd, basedev, startdev,
                         first_offs + 1,
@@ -2385,31 +2648,69 @@ static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track(
                dasd_sfree_request(cqr, startdev);
                return ERR_PTR(-EAGAIN);
        }
        /*
         * A tidaw can address 4k of memory, but must not cross page boundaries
         * We can let the block layer handle this by setting
         * blk_queue_segment_boundary to page boundaries and
         * blk_max_segment_size to page size when setting up the request queue.
+         * For write requests, a TIDAW must not cross track boundaries, because
+         * we have to set the CBC flag on the last tidaw for each track.
         */
-        rq_for_each_segment(bv, req, iter) {
+        if (rq_data_dir(req) == WRITE) {
-                dst = page_address(bv->bv_page) + bv->bv_offset;
+                new_track = 1;
-                last_tidaw = itcw_add_tidaw(itcw, 0x00, dst, bv->bv_len);
+                recid = first_rec;
-                if (IS_ERR(last_tidaw))
+                rq_for_each_segment(bv, req, iter) {
-                        return (struct dasd_ccw_req *)last_tidaw;
+                        dst = page_address(bv->bv_page) + bv->bv_offset;
+                        seg_len = bv->bv_len;
+                        while (seg_len) {
+                                if (new_track) {
+                                        trkid = recid;
+                                        offs = sector_div(trkid, blk_per_trk);
+                                        count_to_trk_end = blk_per_trk - offs;
+                                        count = min((last_rec - recid + 1),
+                                                    (sector_t)count_to_trk_end);
+                                        len_to_track_end = count * blksize;
+                                        recid += count;
+                                        new_track = 0;
+                                }
+                                part_len = min(seg_len, len_to_track_end);
+                                seg_len -= part_len;
+                                len_to_track_end -= part_len;
+                                /* We need to end the tidaw at track end */
+                                if (!len_to_track_end) {
+                                        new_track = 1;
+                                        tidaw_flags = TIDAW_FLAGS_INSERT_CBC;
+                                } else
+                                        tidaw_flags = 0;
+                                last_tidaw = itcw_add_tidaw(itcw, tidaw_flags,
+                                                            dst, part_len);
+                                if (IS_ERR(last_tidaw))
+                                        return ERR_PTR(-EINVAL);
+                                dst += part_len;
+                        }
+                }
+        } else {
+                rq_for_each_segment(bv, req, iter) {
+                        dst = page_address(bv->bv_page) + bv->bv_offset;
+                        last_tidaw = itcw_add_tidaw(itcw, 0x00,
+                                                    dst, bv->bv_len);
+                        if (IS_ERR(last_tidaw))
+                                return ERR_PTR(-EINVAL);
+                }
        }
+        last_tidaw->flags |= TIDAW_FLAGS_LAST;
-        last_tidaw->flags |= 0x80;
+        last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC;
        itcw_finalize(itcw);
        if (blk_noretry_request(req) ||
            block->base->features & DASD_FEATURE_FAILFAST)
                set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
+        cqr->cpmode = 1;
        cqr->startdev = startdev;
        cqr->memdev = startdev;
        cqr->block = block;
        cqr->expires = startdev->default_expires * HZ;  /* default 5 minutes */
-        cqr->lpm = private->path_data.ppm;
+        cqr->lpm = startdev->path_data.ppm;
        cqr->retries = 256;
        cqr->buildclk = get_clock();
        cqr->status = DASD_CQR_FILLED;
@@ -2420,11 +2721,9 @@ static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev,
                                               struct dasd_block *block,
                                               struct request *req)
 {
-        int tpm, cmdrtd, cmdwtd;
+        int cmdrtd, cmdwtd;
        int use_prefix;
-#if defined(CONFIG_64BIT)
+        int fcx_multitrack;
-        int fcx_in_css, fcx_in_gneq, fcx_in_features;
-#endif
        struct dasd_eckd_private *private;
        struct dasd_device *basedev;
        sector_t first_rec, last_rec;
@@ -2432,6 +2731,7 @@ static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev,
        unsigned int first_offs, last_offs;
        unsigned int blk_per_trk, blksize;
        int cdlspecial;
+        unsigned int data_size;
        struct dasd_ccw_req *cqr;
        basedev = block->base;
@@ -2450,15 +2750,11 @@ static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev,
        last_offs = sector_div(last_trk, blk_per_trk);
        cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk);
-        /* is transport mode supported? */
+        fcx_multitrack = private->features.feature[40] & 0x20;
-#if defined(CONFIG_64BIT)
+        data_size = blk_rq_bytes(req);
-        fcx_in_css = css_general_characteristics.fcx;
+        /* tpm write request add CBC data on each track boundary */
-        fcx_in_gneq = private->gneq->reserved2[7] & 0x04;
+        if (rq_data_dir(req) == WRITE)
-        fcx_in_features = private->features.feature[40] & 0x80;
+                data_size += (last_trk - first_trk) * 4;
-        tpm = fcx_in_css && fcx_in_gneq && fcx_in_features;
-#else
-        tpm = 0;
-#endif
        /* is read track data and write track data in command mode supported? */
        cmdrtd = private->features.feature[9] & 0x20;
@@ -2468,13 +2764,15 @@ static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev,
        cqr = NULL;
        if (cdlspecial || dasd_page_cache) {
                /* do nothing, just fall through to the cmd mode single case */
-        } else if (!dasd_nofcx && tpm && (first_trk == last_trk)) {
+        } else if ((data_size <= private->fcx_max_data)
+                   && (fcx_multitrack || (first_trk == last_trk))) {
                cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req,
                                                    first_rec, last_rec,
                                                    first_trk, last_trk,
                                                    first_offs, last_offs,
                                                    blk_per_trk, blksize);
-                if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN)
+                if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) &&
+                    (PTR_ERR(cqr) != -ENOMEM))
                        cqr = NULL;
        } else if (use_prefix &&
                   (((rq_data_dir(req) == READ) && cmdrtd) ||
@@ -2484,7 +2782,8 @@ static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev,
                                                   first_trk, last_trk,
                                                   first_offs, last_offs,
                                                   blk_per_trk, blksize);
-                if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN)
+                if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) &&
+                    (PTR_ERR(cqr) != -ENOMEM))
                        cqr = NULL;
        }
        if (!cqr)
@@ -2496,6 +2795,135 @@ static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev,
        return cqr;
 }
+static struct dasd_ccw_req *dasd_raw_build_cp(struct dasd_device *startdev,
+                                               struct dasd_block *block,
+                                               struct request *req)
+{
+        struct dasd_eckd_private *private;
+        unsigned long *idaws;
+        struct dasd_device *basedev;
+        struct dasd_ccw_req *cqr;
+        struct ccw1 *ccw;
+        struct req_iterator iter;
+        struct bio_vec *bv;
+        char *dst;
+        unsigned char cmd;
+        unsigned int trkcount;
+        unsigned int seg_len, len_to_track_end;
+        unsigned int first_offs;
+        unsigned int cidaw, cplength, datasize;
+        sector_t first_trk, last_trk;
+        unsigned int pfx_datasize;
+        /*
+         * raw track access needs to be mutiple of 64k and on 64k boundary
+         */
+        if ((blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK) != 0) {
+                cqr = ERR_PTR(-EINVAL);
+                goto out;
+        }
+        if (((blk_rq_pos(req) + blk_rq_sectors(req)) %
+             DASD_RAW_SECTORS_PER_TRACK) != 0) {
+                cqr = ERR_PTR(-EINVAL);
+                goto out;
+        }
+        first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK;
+        last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) /
+                DASD_RAW_SECTORS_PER_TRACK;
+        trkcount = last_trk - first_trk + 1;
+        first_offs = 0;
+        basedev = block->base;
+        private = (struct dasd_eckd_private *) basedev->private;
+        if (rq_data_dir(req) == READ)
+                cmd = DASD_ECKD_CCW_READ_TRACK;
+        else if (rq_data_dir(req) == WRITE)
+                cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK;
+        else {
+                cqr = ERR_PTR(-EINVAL);
+                goto out;
+        }
+        /*
+         * Raw track based I/O needs IDAWs for each page,
+         * and not just for 64 bit addresses.
+         */
+        cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK;
+        /* 1x prefix + one read/write ccw per track */
+        cplength = 1 + trkcount;
+        /*
+         * struct PFX_eckd_data has up to 2 byte as extended parameter
+         * this is needed for write full track and has to be mentioned
+         * seperately
+         * add 8 instead of 2 to keep 8 byte boundary
+         */
+        pfx_datasize = sizeof(struct PFX_eckd_data) + 8;
+        datasize = pfx_datasize + cidaw * sizeof(unsigned long long);
+        /* Allocate the ccw request. */
+        cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength,
+                                   datasize, startdev);
+        if (IS_ERR(cqr))
+                goto out;
+        ccw = cqr->cpaddr;
+        if (prefix_LRE(ccw++, cqr->data, first_trk, last_trk, cmd,
+                       basedev, startdev, 1 /* format */, first_offs + 1,
+                       trkcount, 0, 0) == -EAGAIN) {
+                /* Clock not in sync and XRC is enabled.
+                 * Try again later.
+                 */
+                dasd_sfree_request(cqr, startdev);
+                cqr = ERR_PTR(-EAGAIN);
+                goto out;
+        }
+        idaws = (unsigned long *)(cqr->data + pfx_datasize);
+        len_to_track_end = 0;
+        rq_for_each_segment(bv, req, iter) {
+                dst = page_address(bv->bv_page) + bv->bv_offset;
+                seg_len = bv->bv_len;
+                if (!len_to_track_end) {
+                        ccw[-1].flags |= CCW_FLAG_CC;
+                        ccw->cmd_code = cmd;
+                        /* maximum 3390 track size */
+                        ccw->count = 57326;
+                        /* 64k map to one track */
+                        len_to_track_end = 65536;
+                        ccw->cda = (__u32)(addr_t)idaws;
+                        ccw->flags |= CCW_FLAG_IDA;
+                        ccw->flags |= CCW_FLAG_SLI;
+                        ccw++;
+                }
+                len_to_track_end -= seg_len;
+                idaws = idal_create_words(idaws, dst, seg_len);
+        }
+        if (blk_noretry_request(req) ||
+            block->base->features & DASD_FEATURE_FAILFAST)
+                set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
+        cqr->startdev = startdev;
+        cqr->memdev = startdev;
+        cqr->block = block;
+        cqr->expires = startdev->default_expires * HZ;
+        cqr->lpm = startdev->path_data.ppm;
+        cqr->retries = 256;
+        cqr->buildclk = get_clock();
+        cqr->status = DASD_CQR_FILLED;
+        if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN)
+                cqr = NULL;
+out:
+        return cqr;
+}
 static int
 dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req)
 {
@@ -2600,7 +3028,10 @@ static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base,
        spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags);
        private->count++;
-        cqr = dasd_eckd_build_cp(startdev, block, req);
+        if ((base->features & DASD_FEATURE_USERAW))
+                cqr = dasd_raw_build_cp(startdev, block, req);
+        else
+                cqr = dasd_eckd_build_cp(startdev, block, req);
        if (IS_ERR(cqr))
                private->count--;
        spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags);
@@ -2688,6 +3119,8 @@ dasd_eckd_release(struct dasd_device *device)
        cqr->status = DASD_CQR_FILLED;
        rc = dasd_sleep_on_immediatly(cqr);
+        if (!rc)
+                clear_bit(DASD_FLAG_IS_RESERVED, &device->flags);
        if (useglobal)
                mutex_unlock(&dasd_reserve_mutex);
@@ -2741,6 +3174,8 @@ dasd_eckd_reserve(struct dasd_device *device)
        cqr->status = DASD_CQR_FILLED;
        rc = dasd_sleep_on_immediatly(cqr);
+        if (!rc)
+                set_bit(DASD_FLAG_IS_RESERVED, &device->flags);
        if (useglobal)
                mutex_unlock(&dasd_reserve_mutex);
@@ -2793,6 +3228,8 @@ dasd_eckd_steal_lock(struct dasd_device *device)
        cqr->status = DASD_CQR_FILLED;
        rc = dasd_sleep_on_immediatly(cqr);
+        if (!rc)
+                set_bit(DASD_FLAG_IS_RESERVED, &device->flags);
        if (useglobal)
                mutex_unlock(&dasd_reserve_mutex);
@@ -2845,6 +3282,7 @@ static int dasd_eckd_snid(struct dasd_device *device,
        cqr->memdev = device;
        clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
        set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
+        set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags);
        cqr->retries = 5;
        cqr->expires = 10 * HZ;
        cqr->buildclk = get_clock();
@@ -3279,10 +3717,8 @@ static void dasd_eckd_dump_sense_tcw(struct dasd_device *device,
 {
        char *page;
        int len, sl, sct, residual;
        struct tsb *tsb;
-        u8 *sense;
+        u8 *sense, *rcq;
        page = (char *) get_zeroed_page(GFP_ATOMIC);
        if (page == NULL) {
@@ -3348,12 +3784,15 @@ static void dasd_eckd_dump_sense_tcw(struct dasd_device *device,
                case 2: /* ts_ddpc */
                        len += sprintf(page + len, KERN_ERR PRINTK_HEADER
                               " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc);
-                        len += sprintf(page + len, KERN_ERR PRINTK_HEADER
+                        for (sl = 0; sl < 2; sl++) {
-                               " tsb->tsa.ddpc.rcq:  ");
+                                len += sprintf(page + len,
-                        for (sl = 0; sl < 16; sl++) {
+                                               KERN_ERR PRINTK_HEADER
+                                               " tsb->tsa.ddpc.rcq %2d-%2d: ",
+                                               (8 * sl), ((8 * sl) + 7));
+                                rcq = tsb->tsa.ddpc.rcq;
                                for (sct = 0; sct < 8; sct++) {
                                        len += sprintf(page + len, " %02x",
-                                                       tsb->tsa.ddpc.rcq[sl]);
+                                                       rcq[8 * sl + sct]);
                                }
                                len += sprintf(page + len, "\n");
                        }
@@ -3550,6 +3989,7 @@ static struct ccw_driver dasd_eckd_driver = {
        .set_offline = dasd_generic_set_offline,
        .set_online  = dasd_eckd_set_online,
        .notify      = dasd_generic_notify,
+        .path_event  = dasd_generic_path_event,
        .freeze      = dasd_generic_pm_freeze,
        .thaw        = dasd_generic_restore_device,
        .restore     = dasd_generic_restore_device,
@@ -3573,10 +4013,11 @@ static struct dasd_discipline dasd_eckd_discipline = {
        .owner = THIS_MODULE,
        .name = "ECKD",
        .ebcname = "ECKD",
-        .max_blocks = 240,
+        .max_blocks = 190,
        .check_device = dasd_eckd_check_characteristics,
        .uncheck_device = dasd_eckd_uncheck_device,
        .do_analysis = dasd_eckd_do_analysis,
+        .verify_path = dasd_eckd_verify_path,
        .ready_to_online = dasd_eckd_ready_to_online,
        .online_to_ready = dasd_eckd_online_to_ready,
        .fill_geometry = dasd_eckd_fill_geometry,
@@ -3586,7 +4027,7 @@ static struct dasd_discipline dasd_eckd_discipline = {
        .format_device = dasd_eckd_format_device,
        .erp_action = dasd_eckd_erp_action,
        .erp_postaction = dasd_eckd_erp_postaction,
-        .handle_unsolicited_interrupt = dasd_eckd_handle_unsolicited_interrupt,
+        .check_for_device_change = dasd_eckd_check_for_device_change,
        .build_cp = dasd_eckd_build_alias_cp,
        .free_cp = dasd_eckd_free_alias_cp,
        .dump_sense = dasd_eckd_dump_sense,
@@ -3609,11 +4050,19 @@ dasd_eckd_init(void)
                                   GFP_KERNEL | GFP_DMA);
        if (!dasd_reserve_req)
                return -ENOMEM;
+        path_verification_worker = kmalloc(sizeof(*path_verification_worker),
+                                   GFP_KERNEL | GFP_DMA);
+        if (!path_verification_worker) {
+                kfree(dasd_reserve_req);
+                return -ENOMEM;
+        }
        ret = ccw_driver_register(&dasd_eckd_driver);
        if (!ret)
                wait_for_device_probe();
-        else
+        else {
+                kfree(path_verification_worker);
                kfree(dasd_reserve_req);
+        }
        return ret;
 }
@@ -3621,6 +4070,7 @@ static void __exit
 dasd_eckd_cleanup(void)
 {
        ccw_driver_unregister(&dasd_eckd_driver);
+        kfree(path_verification_worker);
        kfree(dasd_reserve_req);
 }
diff --git a/drivers/s390/block/dasd_eckd.h b/drivers/s390/block/dasd_eckd.h
index 12097c24f2f5..4a688a873a77 100644
--- a/drivers/s390/block/dasd_eckd.h
+++ b/drivers/s390/block/dasd_eckd.h
@@ -37,14 +37,17 @@
 #define DASD_ECKD_CCW_WRITE_KD_MT        0x8d
 #define DASD_ECKD_CCW_READ_KD_MT         0x8e
 #define DASD_ECKD_CCW_RELEASE            0x94
+#define DASD_ECKD_CCW_WRITE_FULL_TRACK   0x95
 #define DASD_ECKD_CCW_READ_CKD_MT        0x9e
 #define DASD_ECKD_CCW_WRITE_CKD_MT       0x9d
 #define DASD_ECKD_CCW_WRITE_TRACK_DATA   0xA5
 #define DASD_ECKD_CCW_READ_TRACK_DATA    0xA6
 #define DASD_ECKD_CCW_RESERVE            0xB4
+#define DASD_ECKD_CCW_READ_TRACK         0xDE
 #define DASD_ECKD_CCW_PFX                0xE7
 #define DASD_ECKD_CCW_PFX_READ           0xEA
 #define DASD_ECKD_CCW_RSCK               0xF9
+#define DASD_ECKD_CCW_RCD                0xFA
 /*
 * Perform Subsystem Function / Sub-Orders
@@ -57,6 +60,11 @@
 */
 #define LV_COMPAT_CYL 0xFFFE
+#define FCX_MAX_DATA_FACTOR 65536
+#define DASD_ECKD_RCD_DATA_SIZE 256
 /*****************************************************************************
 * SECTION: Type Definitions
 ****************************************************************************/
@@ -331,12 +339,6 @@ struct dasd_gneq {
        __u8 reserved2[22];
 } __attribute__ ((packed));
-struct dasd_eckd_path {
-        __u8 opm;
-        __u8 ppm;
-        __u8 npm;
-};
 struct dasd_rssd_features {
        char feature[256];
 } __attribute__((packed));
@@ -442,7 +444,6 @@ struct dasd_eckd_private {
        struct vd_sneq *vdsneq;
        struct dasd_gneq *gneq;
-        struct dasd_eckd_path path_data;
        struct eckd_count count_area[5];
        int init_cqr_status;
        int uses_cdl;
@@ -455,6 +456,8 @@ struct dasd_eckd_private {
        struct alias_pav_group *pavgroup;
        struct alias_lcu *lcu;
        int count;
+        u32 fcx_max_data;
 };
diff --git a/drivers/s390/block/dasd_eer.c b/drivers/s390/block/dasd_eer.c
index 83b4615a3b62..77f778b7b070 100644
--- a/drivers/s390/block/dasd_eer.c
+++ b/drivers/s390/block/dasd_eer.c
@@ -473,6 +473,7 @@ int dasd_eer_enable(struct dasd_device *device)
        cqr->retries = 255;
        cqr->expires = 10 * HZ;
        clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
+        set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags);
        ccw = cqr->cpaddr;
        ccw->cmd_code = DASD_ECKD_CCW_SNSS;
diff --git a/drivers/s390/block/dasd_erp.c b/drivers/s390/block/dasd_erp.c
index 7656384a811d..0eafe2e421e7 100644
--- a/drivers/s390/block/dasd_erp.c
+++ b/drivers/s390/block/dasd_erp.c
@@ -96,7 +96,8 @@ dasd_default_erp_action(struct dasd_ccw_req *cqr)
                DBF_DEV_EVENT(DBF_DEBUG, device,
                             "default ERP called (%i retries left)",
                             cqr->retries);
-                cqr->lpm    = LPM_ANYPATH;
+                if (!test_bit(DASD_CQR_VERIFY_PATH, &cqr->flags))
+                        cqr->lpm = device->path_data.opm;
                cqr->status = DASD_CQR_FILLED;
        } else {
                pr_err("%s: default ERP has run out of retries and failed\n",
diff --git a/drivers/s390/block/dasd_fba.c b/drivers/s390/block/dasd_fba.c
index bec5486e0e6d..be89b3a893da 100644
--- a/drivers/s390/block/dasd_fba.c
+++ b/drivers/s390/block/dasd_fba.c
@@ -73,6 +73,7 @@ static struct ccw_driver dasd_fba_driver = {
        .set_offline = dasd_generic_set_offline,
        .set_online  = dasd_fba_set_online,
        .notify      = dasd_generic_notify,
+        .path_event  = dasd_generic_path_event,
        .freeze      = dasd_generic_pm_freeze,
        .thaw        = dasd_generic_restore_device,
        .restore     = dasd_generic_restore_device,
@@ -164,6 +165,7 @@ dasd_fba_check_characteristics(struct dasd_device *device)
        }
        device->default_expires = DASD_EXPIRES;
+        device->path_data.opm = LPM_ANYPATH;
        readonly = dasd_device_is_ro(device);
        if (readonly)
@@ -231,24 +233,16 @@ dasd_fba_erp_postaction(struct dasd_ccw_req * cqr)
        return NULL;
 }
-static void dasd_fba_handle_unsolicited_interrupt(struct dasd_device *device,
+static void dasd_fba_check_for_device_change(struct dasd_device *device,
-                                                   struct irb *irb)
+                                             struct dasd_ccw_req *cqr,
+                                             struct irb *irb)
 {
        char mask;
        /* first of all check for state change pending interrupt */
        mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP;
-        if ((irb->scsw.cmd.dstat & mask) == mask) {
+        if ((irb->scsw.cmd.dstat & mask) == mask)
                dasd_generic_handle_state_change(device);
-                return;
-        }
-        /* check for unsolicited interrupts */
-        DBF_DEV_EVENT(DBF_WARNING, device, "%s",
-                    "unsolicited interrupt received");
-        device->discipline->dump_sense_dbf(device, irb, "unsolicited");
-        dasd_schedule_device_bh(device);
-        return;
 };
 static struct dasd_ccw_req *dasd_fba_build_cp(struct dasd_device * memdev,
@@ -596,13 +590,14 @@ static struct dasd_discipline dasd_fba_discipline = {
        .max_blocks = 96,
        .check_device = dasd_fba_check_characteristics,
        .do_analysis = dasd_fba_do_analysis,
+        .verify_path = dasd_generic_verify_path,
        .fill_geometry = dasd_fba_fill_geometry,
        .start_IO = dasd_start_IO,
        .term_IO = dasd_term_IO,
        .handle_terminated_request = dasd_fba_handle_terminated_request,
        .erp_action = dasd_fba_erp_action,
        .erp_postaction = dasd_fba_erp_postaction,
-        .handle_unsolicited_interrupt = dasd_fba_handle_unsolicited_interrupt,
+        .check_for_device_change = dasd_fba_check_for_device_change,
        .build_cp = dasd_fba_build_cp,
        .free_cp = dasd_fba_free_cp,
        .dump_sense = dasd_fba_dump_sense,
diff --git a/drivers/s390/block/dasd_int.h b/drivers/s390/block/dasd_int.h
index 500678d7116c..df9f6999411d 100644
--- a/drivers/s390/block/dasd_int.h
+++ b/drivers/s390/block/dasd_int.h
@@ -231,6 +231,11 @@ struct dasd_ccw_req {
 /* per dasd_ccw_req flags */
 #define DASD_CQR_FLAGS_USE_ERP   0      /* use ERP for this request */
 #define DASD_CQR_FLAGS_FAILFAST  1      /* FAILFAST */
+#define DASD_CQR_VERIFY_PATH     2      /* path verification request */
+#define DASD_CQR_ALLOW_SLOCK     3      /* Try this request even when lock was
+                                         * stolen. Should not be combined with
+                                         * DASD_CQR_FLAGS_USE_ERP
+                                         */
 /* Signature for error recovery functions. */
 typedef struct dasd_ccw_req *(*dasd_erp_fn_t) (struct dasd_ccw_req *);
@@ -287,6 +292,14 @@ struct dasd_discipline {
        int (*do_analysis) (struct dasd_block *);
        /*
+         * This function is called, when new paths become available.
+         * Disciplins may use this callback to do necessary setup work,
+         * e.g. verify that new path is compatible with the current
+         * configuration.
+         */
+        int (*verify_path)(struct dasd_device *, __u8);
+        /*
         * Last things to do when a device is set online, and first things
         * when it is set offline.
         */
@@ -325,9 +338,9 @@ struct dasd_discipline {
        void (*dump_sense) (struct dasd_device *, struct dasd_ccw_req *,
                            struct irb *);
        void (*dump_sense_dbf) (struct dasd_device *, struct irb *, char *);
+        void (*check_for_device_change) (struct dasd_device *,
-        void (*handle_unsolicited_interrupt) (struct dasd_device *,
+                                         struct dasd_ccw_req *,
-                                              struct irb *);
+                                         struct irb *);
        /* i/o control functions. */
        int (*fill_geometry) (struct dasd_block *, struct hd_geometry *);
@@ -362,6 +375,13 @@ extern struct dasd_discipline *dasd_diag_discipline_pointer;
 #define DASD_EER_STATECHANGE 3
 #define DASD_EER_PPRCSUSPEND 4
+struct dasd_path {
+        __u8 opm;
+        __u8 tbvpm;
+        __u8 ppm;
+        __u8 npm;
+};
 struct dasd_device {
        /* Block device stuff. */
        struct dasd_block *block;
@@ -377,6 +397,7 @@ struct dasd_device {
        struct dasd_discipline *discipline;
        struct dasd_discipline *base_discipline;
        char *private;
+        struct dasd_path path_data;
        /* Device state and target state. */
        int state, target;
@@ -456,6 +477,9 @@ struct dasd_block {
                                         * confuse this with the user specified
                                         * read-only feature.
                                         */
+#define DASD_FLAG_IS_RESERVED   7       /* The device is reserved */
+#define DASD_FLAG_LOCK_STOLEN   8       /* The device lock was stolen */
 void dasd_put_device_wake(struct dasd_device *);
@@ -620,10 +644,15 @@ void dasd_generic_remove (struct ccw_device *cdev);
 int dasd_generic_set_online(struct ccw_device *, struct dasd_discipline *);
 int dasd_generic_set_offline (struct ccw_device *cdev);
 int dasd_generic_notify(struct ccw_device *, int);
+int dasd_generic_last_path_gone(struct dasd_device *);
+int dasd_generic_path_operational(struct dasd_device *);
 void dasd_generic_handle_state_change(struct dasd_device *);
 int dasd_generic_pm_freeze(struct ccw_device *);
 int dasd_generic_restore_device(struct ccw_device *);
 enum uc_todo dasd_generic_uc_handler(struct ccw_device *, struct irb *);
+void dasd_generic_path_event(struct ccw_device *, int *);
+int dasd_generic_verify_path(struct dasd_device *, __u8);
 int dasd_generic_read_dev_chars(struct dasd_device *, int, void *, int);
 char *dasd_get_sense(struct irb *);
diff --git a/drivers/s390/char/Kconfig b/drivers/s390/char/Kconfig
index 40834f18754c..dcee3c5c8954 100644
--- a/drivers/s390/char/Kconfig
+++ b/drivers/s390/char/Kconfig
@@ -2,76 +2,85 @@ comment "S/390 character device drivers"
        depends on S390
 config TN3270
-        tristate "Support for locally attached 3270 terminals"
+        def_tristate y
+        prompt "Support for locally attached 3270 terminals"
        depends on CCW
        help
          Include support for IBM 3270 terminals.
 config TN3270_TTY
-        tristate "Support for tty input/output on 3270 terminals"
+        def_tristate y
+        prompt "Support for tty input/output on 3270 terminals"
        depends on TN3270
        help
          Include support for using an IBM 3270 terminal as a Linux tty.
 config TN3270_FS
-        tristate "Support for fullscreen applications on 3270 terminals"
+        def_tristate m
+        prompt "Support for fullscreen applications on 3270 terminals"
        depends on TN3270
        help
          Include support for fullscreen applications on an IBM 3270 terminal.
 config TN3270_CONSOLE
-        bool "Support for console on 3270 terminal"
+        def_bool y
+        prompt "Support for console on 3270 terminal"
        depends on TN3270=y && TN3270_TTY=y
        help
          Include support for using an IBM 3270 terminal as a Linux system
          console.  Available only if 3270 support is compiled in statically.
 config TN3215
-        bool "Support for 3215 line mode terminal"
+        def_bool y
+        prompt "Support for 3215 line mode terminal"
        depends on CCW
        help
          Include support for IBM 3215 line-mode terminals.
 config TN3215_CONSOLE
-        bool "Support for console on 3215 line mode terminal"
+        def_bool y
+        prompt "Support for console on 3215 line mode terminal"
        depends on TN3215
        help
          Include support for using an IBM 3215 line-mode terminal as a
          Linux system console.
 config CCW_CONSOLE
-        bool
+        def_bool y if TN3215_CONSOLE || TN3270_CONSOLE
-        depends on TN3215_CONSOLE || TN3270_CONSOLE
-        default y
 config SCLP_TTY
-        bool "Support for SCLP line mode terminal"
+        def_bool y
+        prompt "Support for SCLP line mode terminal"
        depends on S390
        help
          Include support for IBM SCLP line-mode terminals.
 config SCLP_CONSOLE
-        bool "Support for console on SCLP line mode terminal"
+        def_bool y
+        prompt "Support for console on SCLP line mode terminal"
        depends on SCLP_TTY
        help
          Include support for using an IBM HWC line-mode terminal as the Linux
          system console.
 config SCLP_VT220_TTY
-        bool "Support for SCLP VT220-compatible terminal"
+        def_bool y
+        prompt "Support for SCLP VT220-compatible terminal"
        depends on S390
        help
          Include support for an IBM SCLP VT220-compatible terminal.
 config SCLP_VT220_CONSOLE
-        bool "Support for console on SCLP VT220-compatible terminal"
+        def_bool y
+        prompt "Support for console on SCLP VT220-compatible terminal"
        depends on SCLP_VT220_TTY
        help
          Include support for using an IBM SCLP VT220-compatible terminal as a
          Linux system console.
 config SCLP_CPI
-        tristate "Control-Program Identification"
+        def_tristate m
+        prompt "Control-Program Identification"
        depends on S390
        help
          This option enables the hardware console interface for system
@@ -83,7 +92,8 @@ config SCLP_CPI
          need this feature and intend to run your kernel in LPAR.
 config SCLP_ASYNC
-        tristate "Support for Call Home via Asynchronous SCLP Records"
+        def_tristate m
+        prompt "Support for Call Home via Asynchronous SCLP Records"
        depends on S390
        help
          This option enables the call home function, which is able to inform
@@ -93,7 +103,8 @@ config SCLP_ASYNC
          need this feature and intend to run your kernel in LPAR.
 config S390_TAPE
-        tristate "S/390 tape device support"
+        def_tristate m
+        prompt "S/390 tape device support"
        depends on CCW
        help
          Select this option if you want to access channel-attached tape
@@ -109,7 +120,8 @@ comment "S/390 tape interface support"
        depends on S390_TAPE
 config S390_TAPE_BLOCK
-        bool "Support for tape block devices"
+        def_bool y
+        prompt "Support for tape block devices"
        depends on S390_TAPE && BLOCK
        help
          Select this option if you want to access your channel-attached tape
@@ -123,7 +135,8 @@ comment "S/390 tape hardware support"
        depends on S390_TAPE
 config S390_TAPE_34XX
-        tristate "Support for 3480/3490 tape hardware"
+        def_tristate m
+        prompt "Support for 3480/3490 tape hardware"
        depends on S390_TAPE
        help
          Select this option if you want to access IBM 3480/3490 magnetic
@@ -131,7 +144,8 @@ config S390_TAPE_34XX
          It is safe to say "Y" here.
 config S390_TAPE_3590
-        tristate "Support for 3590 tape hardware"
+        def_tristate m
+        prompt "Support for 3590 tape hardware"
        depends on S390_TAPE
        help
          Select this option if you want to access IBM 3590 magnetic
@@ -139,7 +153,8 @@ config S390_TAPE_3590
          It is safe to say "Y" here.
 config VMLOGRDR
-        tristate "Support for the z/VM recording system services (VM only)"
+        def_tristate m
+        prompt "Support for the z/VM recording system services (VM only)"
        depends on IUCV
        help
          Select this option if you want to be able to receive records collected
@@ -148,29 +163,31 @@ config VMLOGRDR
          This driver depends on the IUCV support driver.
 config VMCP
-        bool "Support for the z/VM CP interface"
+        def_bool y
+        prompt "Support for the z/VM CP interface"
        depends on S390
        help
          Select this option if you want to be able to interact with the control
          program on z/VM
 config MONREADER
-        tristate "API for reading z/VM monitor service records"
+        def_tristate m
+        prompt "API for reading z/VM monitor service records"
        depends on IUCV
        help
          Character device driver for reading z/VM monitor service records
 config MONWRITER
-        tristate "API for writing z/VM monitor service records"
+        def_tristate m
+        prompt "API for writing z/VM monitor service records"
        depends on S390
-        default "m"
        help
          Character device driver for writing z/VM monitor service records
 config S390_VMUR
-        tristate "z/VM unit record device driver"
+        def_tristate m
+        prompt "z/VM unit record device driver"
        depends on S390
-        default "m"
        help
          Character device driver for z/VM reader, puncher and printer.
diff --git a/drivers/s390/char/con3215.c b/drivers/s390/char/con3215.c
index 59ec073724bf..3fb4335d491d 100644
--- a/drivers/s390/char/con3215.c
+++ b/drivers/s390/char/con3215.c
@@ -9,6 +9,7 @@
 *            Dan Morrison, IBM Corporation <dmorriso@cse.buffalo.edu>
 */
+#include <linux/kernel_stat.h>
 #include <linux/module.h>
 #include <linux/types.h>
 #include <linux/kdev_t.h>
@@ -361,6 +362,7 @@ static void raw3215_irq(struct ccw_device *cdev, unsigned long intparm,
        int cstat, dstat;
        int count;
+        kstat_cpu(smp_processor_id()).irqs[IOINT_C15]++;
        raw = dev_get_drvdata(&cdev->dev);
        req = (struct raw3215_req *) intparm;
        cstat = irb->scsw.cmd.cstat;
diff --git a/drivers/s390/char/raw3270.c b/drivers/s390/char/raw3270.c
index 2a4c566456e7..96ba2fd1c8ad 100644
--- a/drivers/s390/char/raw3270.c
+++ b/drivers/s390/char/raw3270.c
@@ -7,6 +7,7 @@
 *     Copyright IBM Corp. 2003, 2009
 */
+#include <linux/kernel_stat.h>
 #include <linux/module.h>
 #include <linux/err.h>
 #include <linux/init.h>
@@ -329,6 +330,7 @@ raw3270_irq (struct ccw_device *cdev, unsigned long intparm, struct irb *irb)
        struct raw3270_request *rq;
        int rc;
+        kstat_cpu(smp_processor_id()).irqs[IOINT_C70]++;
        rp = dev_get_drvdata(&cdev->dev);
        if (!rp)
                return;
diff --git a/drivers/s390/char/sclp.c b/drivers/s390/char/sclp.c
index 35cc4686b99b..b76c61f82485 100644
--- a/drivers/s390/char/sclp.c
+++ b/drivers/s390/char/sclp.c
@@ -7,6 +7,7 @@
 *            Martin Schwidefsky <schwidefsky@de.ibm.com>
 */
+#include <linux/kernel_stat.h>
 #include <linux/module.h>
 #include <linux/err.h>
 #include <linux/spinlock.h>
@@ -18,16 +19,14 @@
 #include <linux/suspend.h>
 #include <linux/completion.h>
 #include <linux/platform_device.h>
-#include <asm/types.h>
 #include <asm/s390_ext.h>
+#include <asm/types.h>
+#include <asm/irq.h>
 #include "sclp.h"
 #define SCLP_HEADER             "sclp: "
-/* Structure for register_early_external_interrupt. */
-static ext_int_info_t ext_int_info_hwc;
 /* Lock to protect internal data consistency. */
 static DEFINE_SPINLOCK(sclp_lock);
@@ -402,6 +401,7 @@ static void sclp_interrupt_handler(unsigned int ext_int_code,
        u32 finished_sccb;
        u32 evbuf_pending;
+        kstat_cpu(smp_processor_id()).irqs[EXTINT_SCP]++;
        spin_lock(&sclp_lock);
        finished_sccb = param32 & 0xfffffff8;
        evbuf_pending = param32 & 0x3;
@@ -824,6 +824,7 @@ static void sclp_check_handler(unsigned int ext_int_code,
 {
        u32 finished_sccb;
+        kstat_cpu(smp_processor_id()).irqs[EXTINT_SCP]++;
        finished_sccb = param32 & 0xfffffff8;
        /* Is this the interrupt we are waiting for? */
        if (finished_sccb == 0)
@@ -866,8 +867,7 @@ sclp_check_interface(void)
        spin_lock_irqsave(&sclp_lock, flags);
        /* Prepare init mask command */
-        rc = register_early_external_interrupt(0x2401, sclp_check_handler,
+        rc = register_external_interrupt(0x2401, sclp_check_handler);
-                                               &ext_int_info_hwc);
        if (rc) {
                spin_unlock_irqrestore(&sclp_lock, flags);
                return rc;
@@ -900,8 +900,7 @@ sclp_check_interface(void)
                } else
                        rc = -EBUSY;
        }
-        unregister_early_external_interrupt(0x2401, sclp_check_handler,
+        unregister_external_interrupt(0x2401, sclp_check_handler);
-                                            &ext_int_info_hwc);
        spin_unlock_irqrestore(&sclp_lock, flags);
        return rc;
 }
@@ -1064,8 +1063,7 @@ sclp_init(void)
        if (rc)
                goto fail_init_state_uninitialized;
        /* Register interrupt handler */
-        rc = register_early_external_interrupt(0x2401, sclp_interrupt_handler,
+        rc = register_external_interrupt(0x2401, sclp_interrupt_handler);
-                                               &ext_int_info_hwc);
        if (rc)
                goto fail_unregister_reboot_notifier;
        sclp_init_state = sclp_init_state_initialized;
diff --git a/drivers/s390/char/sclp_config.c b/drivers/s390/char/sclp_config.c
index b497afe061cc..16e232a99fb7 100644
--- a/drivers/s390/char/sclp_config.c
+++ b/drivers/s390/char/sclp_config.c
@@ -33,6 +33,7 @@ static void sclp_cpu_capability_notify(struct work_struct *work)
        int cpu;
        struct sys_device *sysdev;
+        s390_adjust_jiffies();
        pr_warning("cpu capability changed.\n");
        get_online_cpus();
        for_each_online_cpu(cpu) {
diff --git a/drivers/s390/char/tape_core.c b/drivers/s390/char/tape_core.c
index b3a3e8e8656e..7978a0adeaf3 100644
--- a/drivers/s390/char/tape_core.c
+++ b/drivers/s390/char/tape_core.c
@@ -14,6 +14,7 @@
 #define KMSG_COMPONENT "tape"
 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#include <linux/kernel_stat.h>
 #include <linux/module.h>
 #include <linux/init.h>      // for kernel parameters
 #include <linux/kmod.h>      // for requesting modules
@@ -1114,6 +1115,7 @@ __tape_do_irq (struct ccw_device *cdev, unsigned long intparm, struct irb *irb)
        struct tape_request *request;
        int rc;
+        kstat_cpu(smp_processor_id()).irqs[IOINT_TAP]++;
        device = dev_get_drvdata(&cdev->dev);
        if (device == NULL) {
                return;
diff --git a/drivers/s390/char/vmur.c b/drivers/s390/char/vmur.c
index f7e4ae6bf15a..caef1757341d 100644
--- a/drivers/s390/char/vmur.c
+++ b/drivers/s390/char/vmur.c
@@ -11,6 +11,7 @@
 #define KMSG_COMPONENT "vmur"
 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#include <linux/kernel_stat.h>
 #include <linux/cdev.h>
 #include <linux/slab.h>
@@ -302,6 +303,7 @@ static void ur_int_handler(struct ccw_device *cdev, unsigned long intparm,
 {
        struct urdev *urd;
+        kstat_cpu(smp_processor_id()).irqs[IOINT_VMR]++;
        TRACE("ur_int_handler: intparm=0x%lx cstat=%02x dstat=%02x res=%u\n",
              intparm, irb->scsw.cmd.cstat, irb->scsw.cmd.dstat,
              irb->scsw.cmd.count);
diff --git a/drivers/s390/cio/ccwgroup.c b/drivers/s390/cio/ccwgroup.c
index 97b25d68e3e7..2864581d8ecb 100644
--- a/drivers/s390/cio/ccwgroup.c
+++ b/drivers/s390/cio/ccwgroup.c
@@ -67,6 +67,27 @@ __ccwgroup_remove_symlinks(struct ccwgroup_device *gdev)
 }
 /*
+ * Remove references from ccw devices to ccw group device and from
+ * ccw group device to ccw devices.
+ */
+static void __ccwgroup_remove_cdev_refs(struct ccwgroup_device *gdev)
+{
+        struct ccw_device *cdev;
+        int i;
+        for (i = 0; i < gdev->count; i++) {
+                cdev = gdev->cdev[i];
+                if (!cdev)
+                        continue;
+                spin_lock_irq(cdev->ccwlock);
+                dev_set_drvdata(&cdev->dev, NULL);
+                spin_unlock_irq(cdev->ccwlock);
+                gdev->cdev[i] = NULL;
+                put_device(&cdev->dev);
+        }
+}
+/*
 * Provide an 'ungroup' attribute so the user can remove group devices no
 * longer needed or accidentially created. Saves memory :)
 */
@@ -78,6 +99,7 @@ static void ccwgroup_ungroup_callback(struct device *dev)
        if (device_is_registered(&gdev->dev)) {
                __ccwgroup_remove_symlinks(gdev);
                device_unregister(dev);
+                __ccwgroup_remove_cdev_refs(gdev);
        }
        mutex_unlock(&gdev->reg_mutex);
 }
@@ -116,21 +138,7 @@ static DEVICE_ATTR(ungroup, 0200, NULL, ccwgroup_ungroup_store);
 static void
 ccwgroup_release (struct device *dev)
 {
-        struct ccwgroup_device *gdev;
+        kfree(to_ccwgroupdev(dev));
-        int i;
-        gdev = to_ccwgroupdev(dev);
-        for (i = 0; i < gdev->count; i++) {
-                if (gdev->cdev[i]) {
-                        spin_lock_irq(gdev->cdev[i]->ccwlock);
-                        if (dev_get_drvdata(&gdev->cdev[i]->dev) == gdev)
-                                dev_set_drvdata(&gdev->cdev[i]->dev, NULL);
-                        spin_unlock_irq(gdev->cdev[i]->ccwlock);
-                        put_device(&gdev->cdev[i]->dev);
-                }
-        }
-        kfree(gdev);
 }
 static int
@@ -639,6 +647,7 @@ void ccwgroup_driver_unregister(struct ccwgroup_driver *cdriver)
                mutex_lock(&gdev->reg_mutex);
                __ccwgroup_remove_symlinks(gdev);
                device_unregister(dev);
+                __ccwgroup_remove_cdev_refs(gdev);
                mutex_unlock(&gdev->reg_mutex);
                put_device(dev);
        }
@@ -660,25 +669,6 @@ int ccwgroup_probe_ccwdev(struct ccw_device *cdev)
        return 0;
 }
-static struct ccwgroup_device *
-__ccwgroup_get_gdev_by_cdev(struct ccw_device *cdev)
-{
-        struct ccwgroup_device *gdev;
-        gdev = dev_get_drvdata(&cdev->dev);
-        if (gdev) {
-                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;
-        }
-        return NULL;
-}
 /**
 * ccwgroup_remove_ccwdev() - remove function for slave devices
 * @cdev: ccw device to be removed
@@ -694,13 +684,25 @@ void ccwgroup_remove_ccwdev(struct ccw_device *cdev)
        /* Ignore offlining errors, device is gone anyway. */
        ccw_device_set_offline(cdev);
        /* If one of its devices is gone, the whole group is done for. */
-        gdev = __ccwgroup_get_gdev_by_cdev(cdev);
+        spin_lock_irq(cdev->ccwlock);
-        if (gdev) {
+        gdev = dev_get_drvdata(&cdev->dev);
+        if (!gdev) {
+                spin_unlock_irq(cdev->ccwlock);
+                return;
+        }
+        /* Get ccwgroup device reference for local processing. */
+        get_device(&gdev->dev);
+        spin_unlock_irq(cdev->ccwlock);
+        /* Unregister group device. */
+        mutex_lock(&gdev->reg_mutex);
+        if (device_is_registered(&gdev->dev)) {
                __ccwgroup_remove_symlinks(gdev);
                device_unregister(&gdev->dev);
-                mutex_unlock(&gdev->reg_mutex);
+                __ccwgroup_remove_cdev_refs(gdev);
-                put_device(&gdev->dev);
        }
+        mutex_unlock(&gdev->reg_mutex);
+        /* Release ccwgroup device reference for local processing. */
+        put_device(&gdev->dev);
 }
 MODULE_LICENSE("GPL");
diff --git a/drivers/s390/cio/chsc.c b/drivers/s390/cio/chsc.c
index 1aaddea673e0..0689fcf23a11 100644
--- a/drivers/s390/cio/chsc.c
+++ b/drivers/s390/cio/chsc.c
@@ -695,6 +695,25 @@ out:
        return ret;
 }
+int chsc_determine_fmt1_channel_path_desc(struct chp_id chpid,
+                                          struct channel_path_desc_fmt1 *desc)
+{
+        struct chsc_response_struct *chsc_resp;
+        struct chsc_scpd *scpd_area;
+        int ret;
+        spin_lock_irq(&chsc_page_lock);
+        scpd_area = chsc_page;
+        ret = chsc_determine_channel_path_desc(chpid, 0, 0, 1, 0, scpd_area);
+        if (ret)
+                goto out;
+        chsc_resp = (void *)&scpd_area->response;
+        memcpy(desc, &chsc_resp->data, sizeof(*desc));
+out:
+        spin_unlock_irq(&chsc_page_lock);
+        return ret;
+}
 static void
 chsc_initialize_cmg_chars(struct channel_path *chp, u8 cmcv,
                          struct cmg_chars *chars)
diff --git a/drivers/s390/cio/chsc.h b/drivers/s390/cio/chsc.h
index 6693f5e3176f..3f15b2aaeaea 100644
--- a/drivers/s390/cio/chsc.h
+++ b/drivers/s390/cio/chsc.h
@@ -35,6 +35,22 @@ struct channel_path_desc {
        u8 chpp;
 } __attribute__ ((packed));
+struct channel_path_desc_fmt1 {
+        u8 flags;
+        u8 lsn;
+        u8 desc;
+        u8 chpid;
+        u32:24;
+        u8 chpp;
+        u32 unused[3];
+        u16 mdc;
+        u16:13;
+        u8 r:1;
+        u8 s:1;
+        u8 f:1;
+        u32 zeros[2];
+} __attribute__ ((packed));
 struct channel_path;
 struct css_chsc_char {
@@ -92,6 +108,8 @@ int chsc_determine_channel_path_desc(struct chp_id chpid, int fmt, int rfmt,
                                     int c, int m, void *page);
 int chsc_determine_base_channel_path_desc(struct chp_id chpid,
                                          struct channel_path_desc *desc);
+int chsc_determine_fmt1_channel_path_desc(struct chp_id chpid,
+                                          struct channel_path_desc_fmt1 *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);
diff --git a/drivers/s390/cio/css.c b/drivers/s390/cio/css.c
index 825951b6b83f..24d8e97355b9 100644
--- a/drivers/s390/cio/css.c
+++ b/drivers/s390/cio/css.c
@@ -618,6 +618,7 @@ EXPORT_SYMBOL_GPL(css_schedule_reprobe);
 static void css_process_crw(struct crw *crw0, struct crw *crw1, int overflow)
 {
        struct subchannel_id mchk_schid;
+        struct subchannel *sch;
        if (overflow) {
                css_schedule_eval_all();
@@ -637,6 +638,13 @@ static void css_process_crw(struct crw *crw0, struct crw *crw1, int overflow)
        if (crw1)
                mchk_schid.ssid = (crw1->rsid >> 4) & 3;
+        if (crw0->erc == CRW_ERC_PMOD) {
+                sch = get_subchannel_by_schid(mchk_schid);
+                if (sch) {
+                        css_update_ssd_info(sch);
+                        put_device(&sch->dev);
+                }
+        }
        /*
         * Since we are always presented with IPI in the CRW, we have to
         * use stsch() to find out if the subchannel in question has come
diff --git a/drivers/s390/cio/device_ops.c b/drivers/s390/cio/device_ops.c
index 6da84543dfe9..651976b54af8 100644
--- a/drivers/s390/cio/device_ops.c
+++ b/drivers/s390/cio/device_ops.c
@@ -687,6 +687,46 @@ int ccw_device_tm_start_timeout(struct ccw_device *cdev, struct tcw *tcw,
 EXPORT_SYMBOL(ccw_device_tm_start_timeout);
 /**
+ * ccw_device_get_mdc - accumulate max data count
+ * @cdev: ccw device for which the max data count is accumulated
+ * @mask: mask of paths to use
+ *
+ * Return the number of 64K-bytes blocks all paths at least support
+ * for a transport command. Return values <= 0 indicate failures.
+ */
+int ccw_device_get_mdc(struct ccw_device *cdev, u8 mask)
+{
+        struct subchannel *sch = to_subchannel(cdev->dev.parent);
+        struct channel_path_desc_fmt1 desc;
+        struct chp_id chpid;
+        int mdc = 0, ret, i;
+        /* Adjust requested path mask to excluded varied off paths. */
+        if (mask)
+                mask &= sch->lpm;
+        else
+                mask = sch->lpm;
+        chp_id_init(&chpid);
+        for (i = 0; i < 8; i++) {
+                if (!(mask & (0x80 >> i)))
+                        continue;
+                chpid.id = sch->schib.pmcw.chpid[i];
+                ret = chsc_determine_fmt1_channel_path_desc(chpid, &desc);
+                if (ret)
+                        return ret;
+                if (!desc.f)
+                        return 0;
+                if (!desc.r)
+                        mdc = 1;
+                mdc = mdc ? min(mdc, (int)desc.mdc) : desc.mdc;
+        }
+        return mdc;
+}
+EXPORT_SYMBOL(ccw_device_get_mdc);
+/**
 * ccw_device_tm_intrg - perform interrogate function
 * @cdev: ccw device on which to perform the interrogate function
 *
diff --git a/drivers/s390/cio/itcw.c b/drivers/s390/cio/itcw.c
index a0ae29564774..358ee16d10a2 100644
--- a/drivers/s390/cio/itcw.c
+++ b/drivers/s390/cio/itcw.c
@@ -93,6 +93,7 @@ EXPORT_SYMBOL(itcw_get_tcw);
 size_t itcw_calc_size(int intrg, int max_tidaws, int intrg_max_tidaws)
 {
        size_t len;
+        int cross_count;
        /* Main data. */
        len = sizeof(struct itcw);
@@ -105,12 +106,27 @@ size_t itcw_calc_size(int intrg, int max_tidaws, int intrg_max_tidaws)
                       /* TSB */ sizeof(struct tsb) +
                       /* TIDAL */ intrg_max_tidaws * sizeof(struct tidaw);
        }
        /* Maximum required alignment padding. */
        len += /* Initial TCW */ 63 + /* Interrogate TCCB */ 7;
-        /* Maximum padding for structures that may not cross 4k boundary. */
-        if ((max_tidaws > 0) || (intrg_max_tidaws > 0))
+        /* TIDAW lists may not cross a 4k boundary. To cross a
-                len += max(max_tidaws, intrg_max_tidaws) *
+         * boundary we need to add a TTIC TIDAW. We need to reserve
-                       sizeof(struct tidaw) - 1;
+         * one additional TIDAW for a TTIC that we may need to add due
+         * to the placement of the data chunk in memory, and a further
+         * TIDAW for each page boundary that the TIDAW list may cross
+         * due to it's own size.
+         */
+        if (max_tidaws) {
+                cross_count = 1 + ((max_tidaws * sizeof(struct tidaw) - 1)
+                                   >> PAGE_SHIFT);
+                len += cross_count * sizeof(struct tidaw);
+        }
+        if (intrg_max_tidaws) {
+                cross_count = 1 + ((intrg_max_tidaws * sizeof(struct tidaw) - 1)
+                                   >> PAGE_SHIFT);
+                len += cross_count * sizeof(struct tidaw);
+        }
        return len;
 }
 EXPORT_SYMBOL(itcw_calc_size);
@@ -165,6 +181,7 @@ struct itcw *itcw_init(void *buffer, size_t size, int op, int intrg,
        void *chunk;
        addr_t start;
        addr_t end;
+        int cross_count;
        /* Check for 2G limit. */
        start = (addr_t) buffer;
@@ -177,8 +194,17 @@ struct itcw *itcw_init(void *buffer, size_t size, int op, int intrg,
        if (IS_ERR(chunk))
                return chunk;
        itcw = chunk;
-        itcw->max_tidaws = max_tidaws;
+        /* allow for TTIC tidaws that may be needed to cross a page boundary */
-        itcw->intrg_max_tidaws = intrg_max_tidaws;
+        cross_count = 0;
+        if (max_tidaws)
+                cross_count = 1 + ((max_tidaws * sizeof(struct tidaw) - 1)
+                                   >> PAGE_SHIFT);
+        itcw->max_tidaws = max_tidaws + cross_count;
+        cross_count = 0;
+        if (intrg_max_tidaws)
+                cross_count = 1 + ((intrg_max_tidaws * sizeof(struct tidaw) - 1)
+                                   >> PAGE_SHIFT);
+        itcw->intrg_max_tidaws = intrg_max_tidaws + cross_count;
        /* Main TCW. */
        chunk = fit_chunk(&start, end, sizeof(struct tcw), 64, 0);
        if (IS_ERR(chunk))
@@ -198,7 +224,7 @@ struct itcw *itcw_init(void *buffer, size_t size, int op, int intrg,
        /* Data TIDAL. */
        if (max_tidaws > 0) {
                chunk = fit_chunk(&start, end, sizeof(struct tidaw) *
-                                  max_tidaws, 16, 1);
+                                  itcw->max_tidaws, 16, 0);
                if (IS_ERR(chunk))
                        return chunk;
                tcw_set_data(itcw->tcw, chunk, 1);
@@ -206,7 +232,7 @@ struct itcw *itcw_init(void *buffer, size_t size, int op, int intrg,
        /* Interrogate data TIDAL. */
        if (intrg && (intrg_max_tidaws > 0)) {
                chunk = fit_chunk(&start, end, sizeof(struct tidaw) *
-                                  intrg_max_tidaws, 16, 1);
+                                  itcw->intrg_max_tidaws, 16, 0);
                if (IS_ERR(chunk))
                        return chunk;
                tcw_set_data(itcw->intrg_tcw, chunk, 1);
@@ -283,13 +309,29 @@ EXPORT_SYMBOL(itcw_add_dcw);
 * the new tidaw on success or -%ENOSPC if the new tidaw would exceed the
 * available space.
 *
- * Note: the tidaw-list is assumed to be contiguous with no ttics. The
+ * Note: TTIC tidaws are automatically added when needed, so explicitly calling
- * last-tidaw flag for the last tidaw in the list will be set by itcw_finalize.
+ * this interface with the TTIC flag is not supported. The last-tidaw flag
+ * for the last tidaw in the list will be set by itcw_finalize.
 */
 struct tidaw *itcw_add_tidaw(struct itcw *itcw, u8 flags, void *addr, u32 count)
 {
+        struct tidaw *following;
        if (itcw->num_tidaws >= itcw->max_tidaws)
                return ERR_PTR(-ENOSPC);
+        /*
+         * Is the tidaw, which follows the one we are about to fill, on the next
+         * page? Then we have to insert a TTIC tidaw first, that points to the
+         * tidaw on the new page.
+         */
+        following = ((struct tidaw *) tcw_get_data(itcw->tcw))
+                + itcw->num_tidaws + 1;
+        if (itcw->num_tidaws && !((unsigned long) following & ~PAGE_MASK)) {
+                tcw_add_tidaw(itcw->tcw, itcw->num_tidaws++,
+                              TIDAW_FLAGS_TTIC, following, 0);
+                if (itcw->num_tidaws >= itcw->max_tidaws)
+                        return ERR_PTR(-ENOSPC);
+        }
        return tcw_add_tidaw(itcw->tcw, itcw->num_tidaws++, flags, addr, count);
 }
 EXPORT_SYMBOL(itcw_add_tidaw);
diff --git a/drivers/s390/cio/qdio.h b/drivers/s390/cio/qdio.h
index 0f4ef8769a3d..7bc643f3f5ab 100644
--- a/drivers/s390/cio/qdio.h
+++ b/drivers/s390/cio/qdio.h
@@ -91,6 +91,12 @@ enum qdio_irq_states {
 #define AC1_SC_QEBSM_AVAILABLE          0x02    /* available for subchannel */
 #define AC1_SC_QEBSM_ENABLED            0x01    /* enabled for subchannel */
+/* SIGA flags */
+#define QDIO_SIGA_WRITE         0x00
+#define QDIO_SIGA_READ          0x01
+#define QDIO_SIGA_SYNC          0x02
+#define QDIO_SIGA_QEBSM_FLAG    0x80
 #ifdef CONFIG_64BIT
 static inline int do_sqbs(u64 token, unsigned char state, int queue,
                          int *start, int *count)
@@ -142,10 +148,9 @@ struct siga_flag {
        u8 input:1;
        u8 output:1;
        u8 sync:1;
-        u8 no_sync_ti:1;
+        u8 sync_after_ai:1;
-        u8 no_sync_out_ti:1;
+        u8 sync_out_after_pci:1;
-        u8 no_sync_out_pci:1;
+        u8:3;
-        u8:2;
 } __attribute__ ((packed));
 struct chsc_ssqd_area {
@@ -202,6 +207,7 @@ struct qdio_dev_perf_stat {
        unsigned int inbound_queue_full;
        unsigned int outbound_call;
        unsigned int outbound_handler;
+        unsigned int outbound_queue_full;
        unsigned int fast_requeue;
        unsigned int target_full;
        unsigned int eqbs;
@@ -245,10 +251,10 @@ struct qdio_input_q {
 struct qdio_output_q {
        /* PCIs are enabled for the queue */
        int pci_out_enabled;
-        /* IQDIO: output multiple buffers (enhanced SIGA) */
-        int use_enh_siga;
        /* timer to check for more outbound work */
        struct timer_list timer;
+        /* used SBALs before tasklet schedule */
+        int scan_threshold;
 };
 /*
@@ -383,12 +389,13 @@ static inline int multicast_outbound(struct qdio_q *q)
        (q->irq_ptr->qib.ac & QIB_AC_OUTBOUND_PCI_SUPPORTED)
 #define is_qebsm(q)                     (q->irq_ptr->sch_token != 0)
-#define need_siga_sync_thinint(q)       (!q->irq_ptr->siga_flag.no_sync_ti)
-#define need_siga_sync_out_thinint(q)   (!q->irq_ptr->siga_flag.no_sync_out_ti)
 #define need_siga_in(q)                 (q->irq_ptr->siga_flag.input)
 #define need_siga_out(q)                (q->irq_ptr->siga_flag.output)
-#define need_siga_sync(q)               (q->irq_ptr->siga_flag.sync)
+#define need_siga_sync(q)               (unlikely(q->irq_ptr->siga_flag.sync))
-#define siga_syncs_out_pci(q)           (q->irq_ptr->siga_flag.no_sync_out_pci)
+#define need_siga_sync_after_ai(q)      \
+        (unlikely(q->irq_ptr->siga_flag.sync_after_ai))
+#define need_siga_sync_out_after_pci(q) \
+        (unlikely(q->irq_ptr->siga_flag.sync_out_after_pci))
 #define for_each_input_queue(irq_ptr, q, i)     \
        for (i = 0, q = irq_ptr->input_qs[0];   \
@@ -423,9 +430,9 @@ struct indicator_t {
 extern struct indicator_t *q_indicators;
-static inline int shared_ind(struct qdio_irq *irq_ptr)
+static inline int shared_ind(u32 *dsci)
 {
-        return irq_ptr->dsci == &q_indicators[TIQDIO_SHARED_IND].ind;
+        return dsci == &q_indicators[TIQDIO_SHARED_IND].ind;
 }
 /* prototypes for thin interrupt */
diff --git a/drivers/s390/cio/qdio_debug.c b/drivers/s390/cio/qdio_debug.c
index 28868e7471a5..f8b03a636e49 100644
--- a/drivers/s390/cio/qdio_debug.c
+++ b/drivers/s390/cio/qdio_debug.c
@@ -151,6 +151,7 @@ static char *qperf_names[] = {
        "Inbound queue full",
        "Outbound calls",
        "Outbound handler",
+        "Outbound queue full",
        "Outbound fast_requeue",
        "Outbound target_full",
        "QEBSM eqbs",
diff --git a/drivers/s390/cio/qdio_main.c b/drivers/s390/cio/qdio_main.c
index 5fcfa7f9e9ef..e9fff2b9bce2 100644
--- a/drivers/s390/cio/qdio_main.c
+++ b/drivers/s390/cio/qdio_main.c
@@ -14,6 +14,7 @@
 #include <linux/timer.h>
 #include <linux/delay.h>
 #include <linux/gfp.h>
+#include <linux/kernel_stat.h>
 #include <asm/atomic.h>
 #include <asm/debug.h>
 #include <asm/qdio.h>
@@ -29,11 +30,12 @@ MODULE_AUTHOR("Utz Bacher <utz.bacher@de.ibm.com>,"\
 MODULE_DESCRIPTION("QDIO base support");
 MODULE_LICENSE("GPL");
-static inline int do_siga_sync(struct subchannel_id schid,
+static inline int do_siga_sync(unsigned long schid,
-                               unsigned int out_mask, unsigned int in_mask)
+                               unsigned int out_mask, unsigned int in_mask,
+                               unsigned int fc)
 {
-        register unsigned long __fc asm ("0") = 2;
+        register unsigned long __fc asm ("0") = fc;
-        register struct subchannel_id __schid asm ("1") = schid;
+        register unsigned long __schid asm ("1") = schid;
        register unsigned long out asm ("2") = out_mask;
        register unsigned long in asm ("3") = in_mask;
        int cc;
@@ -47,10 +49,11 @@ static inline int do_siga_sync(struct subchannel_id schid,
        return cc;
 }
-static inline int do_siga_input(struct subchannel_id schid, unsigned int mask)
+static inline int do_siga_input(unsigned long schid, unsigned int mask,
+                                unsigned int fc)
 {
-        register unsigned long __fc asm ("0") = 1;
+        register unsigned long __fc asm ("0") = fc;
-        register struct subchannel_id __schid asm ("1") = schid;
+        register unsigned long __schid asm ("1") = schid;
        register unsigned long __mask asm ("2") = mask;
        int cc;
@@ -279,16 +282,20 @@ void qdio_init_buf_states(struct qdio_irq *irq_ptr)
 static inline int qdio_siga_sync(struct qdio_q *q, unsigned int output,
                          unsigned int input)
 {
+        unsigned long schid = *((u32 *) &q->irq_ptr->schid);
+        unsigned int fc = QDIO_SIGA_SYNC;
        int cc;
-        if (!need_siga_sync(q))
-                return 0;
        DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "siga-s:%1d", q->nr);
        qperf_inc(q, siga_sync);
-        cc = do_siga_sync(q->irq_ptr->schid, output, input);
+        if (is_qebsm(q)) {
-        if (cc)
+                schid = q->irq_ptr->sch_token;
+                fc |= QDIO_SIGA_QEBSM_FLAG;
+        }
+        cc = do_siga_sync(schid, output, input, fc);
+        if (unlikely(cc))
                DBF_ERROR("%4x SIGA-S:%2d", SCH_NO(q), cc);
        return cc;
 }
@@ -301,38 +308,22 @@ static inline int qdio_siga_sync_q(struct qdio_q *q)
                return qdio_siga_sync(q, q->mask, 0);
 }
-static inline int qdio_siga_sync_out(struct qdio_q *q)
-{
-        return qdio_siga_sync(q, ~0U, 0);
-}
-static inline int qdio_siga_sync_all(struct qdio_q *q)
-{
-        return qdio_siga_sync(q, ~0U, ~0U);
-}
 static int qdio_siga_output(struct qdio_q *q, unsigned int *busy_bit)
 {
-        unsigned long schid;
+        unsigned long schid = *((u32 *) &q->irq_ptr->schid);
-        unsigned int fc = 0;
+        unsigned int fc = QDIO_SIGA_WRITE;
        u64 start_time = 0;
        int cc;
-        if (q->u.out.use_enh_siga)
-                fc = 3;
        if (is_qebsm(q)) {
                schid = q->irq_ptr->sch_token;
-                fc |= 0x80;
+                fc |= QDIO_SIGA_QEBSM_FLAG;
        }
-        else
-                schid = *((u32 *)&q->irq_ptr->schid);
 again:
        cc = do_siga_output(schid, q->mask, busy_bit, fc);
        /* hipersocket busy condition */
-        if (*busy_bit) {
+        if (unlikely(*busy_bit)) {
                WARN_ON(queue_type(q) != QDIO_IQDIO_QFMT || cc != 2);
                if (!start_time) {
@@ -347,32 +338,41 @@ again:
 static inline int qdio_siga_input(struct qdio_q *q)
 {
+        unsigned long schid = *((u32 *) &q->irq_ptr->schid);
+        unsigned int fc = QDIO_SIGA_READ;
        int cc;
        DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "siga-r:%1d", q->nr);
        qperf_inc(q, siga_read);
-        cc = do_siga_input(q->irq_ptr->schid, q->mask);
+        if (is_qebsm(q)) {
-        if (cc)
+                schid = q->irq_ptr->sch_token;
+                fc |= QDIO_SIGA_QEBSM_FLAG;
+        }
+        cc = do_siga_input(schid, q->mask, fc);
+        if (unlikely(cc))
                DBF_ERROR("%4x SIGA-R:%2d", SCH_NO(q), cc);
        return cc;
 }
-static inline void qdio_sync_after_thinint(struct qdio_q *q)
+#define qdio_siga_sync_out(q) qdio_siga_sync(q, ~0U, 0)
+#define qdio_siga_sync_all(q) qdio_siga_sync(q, ~0U, ~0U)
+static inline void qdio_sync_queues(struct qdio_q *q)
 {
-        if (pci_out_supported(q)) {
+        /* PCI capable outbound queues will also be scanned so sync them too */
-                if (need_siga_sync_thinint(q))
+        if (pci_out_supported(q))
-                        qdio_siga_sync_all(q);
+                qdio_siga_sync_all(q);
-                else if (need_siga_sync_out_thinint(q))
+        else
-                        qdio_siga_sync_out(q);
-        } else
                qdio_siga_sync_q(q);
 }
 int debug_get_buf_state(struct qdio_q *q, unsigned int bufnr,
                        unsigned char *state)
 {
-        qdio_siga_sync_q(q);
+        if (need_siga_sync(q))
+                qdio_siga_sync_q(q);
        return get_buf_states(q, bufnr, state, 1, 0);
 }
@@ -549,7 +549,8 @@ static inline int qdio_inbound_q_done(struct qdio_q *q)
        if (!atomic_read(&q->nr_buf_used))
                return 1;
-        qdio_siga_sync_q(q);
+        if (need_siga_sync(q))
+                qdio_siga_sync_q(q);
        get_buf_state(q, q->first_to_check, &state, 0);
        if (state == SLSB_P_INPUT_PRIMED || state == SLSB_P_INPUT_ERROR)
@@ -644,9 +645,12 @@ static int get_outbound_buffer_frontier(struct qdio_q *q)
        int count, stop;
        unsigned char state;
-        if (((queue_type(q) != QDIO_IQDIO_QFMT) && !pci_out_supported(q)) ||
+        if (need_siga_sync(q))
-            (queue_type(q) == QDIO_IQDIO_QFMT && multicast_outbound(q)))
+                if (((queue_type(q) != QDIO_IQDIO_QFMT) &&
-                qdio_siga_sync_q(q);
+                    !pci_out_supported(q)) ||
+                    (queue_type(q) == QDIO_IQDIO_QFMT &&
+                    multicast_outbound(q)))
+                        qdio_siga_sync_q(q);
        /*
         * Don't check 128 buffers, as otherwise qdio_inbound_q_moved
@@ -818,7 +822,8 @@ static inline void qdio_check_outbound_after_thinint(struct qdio_q *q)
 static void __tiqdio_inbound_processing(struct qdio_q *q)
 {
        qperf_inc(q, tasklet_inbound);
-        qdio_sync_after_thinint(q);
+        if (need_siga_sync(q) && need_siga_sync_after_ai(q))
+                qdio_sync_queues(q);
        /*
         * The interrupt could be caused by a PCI request. Check the
@@ -898,16 +903,14 @@ static void qdio_int_handler_pci(struct qdio_irq *irq_ptr)
                        tasklet_schedule(&q->tasklet);
        }
-        if (!(irq_ptr->qib.ac & QIB_AC_OUTBOUND_PCI_SUPPORTED))
+        if (!pci_out_supported(q))
                return;
        for_each_output_queue(irq_ptr, q, i) {
                if (qdio_outbound_q_done(q))
                        continue;
+                if (need_siga_sync(q) && need_siga_sync_out_after_pci(q))
-                if (!siga_syncs_out_pci(q))
                        qdio_siga_sync_q(q);
                tasklet_schedule(&q->tasklet);
        }
 }
@@ -970,6 +973,7 @@ void qdio_int_handler(struct ccw_device *cdev, unsigned long intparm,
                return;
        }
+        kstat_cpu(smp_processor_id()).irqs[IOINT_QDI]++;
        if (irq_ptr->perf_stat_enabled)
                irq_ptr->perf_stat.qdio_int++;
@@ -1273,7 +1277,6 @@ int qdio_establish(struct qdio_initialize *init_data)
        }
        qdio_setup_ssqd_info(irq_ptr);
-        DBF_EVENT("qDmmwc:%2x", irq_ptr->ssqd_desc.mmwc);
        DBF_EVENT("qib ac:%4x", irq_ptr->qib.ac);
        /* qebsm is now setup if available, initialize buffer states */
@@ -1445,52 +1448,38 @@ static int handle_outbound(struct qdio_q *q, unsigned int callflags,
        used = atomic_add_return(count, &q->nr_buf_used);
        BUG_ON(used > QDIO_MAX_BUFFERS_PER_Q);
+        if (used == QDIO_MAX_BUFFERS_PER_Q)
+                qperf_inc(q, outbound_queue_full);
        if (callflags & QDIO_FLAG_PCI_OUT) {
                q->u.out.pci_out_enabled = 1;
                qperf_inc(q, pci_request_int);
-        }
+        } else
-        else
                q->u.out.pci_out_enabled = 0;
        if (queue_type(q) == QDIO_IQDIO_QFMT) {
-                if (multicast_outbound(q))
+                /* One SIGA-W per buffer required for unicast HiperSockets. */
+                WARN_ON_ONCE(count > 1 && !multicast_outbound(q));
+                rc = qdio_kick_outbound_q(q);
+        } else if (need_siga_sync(q)) {
+                rc = qdio_siga_sync_q(q);
+        } else {
+                /* try to fast requeue buffers */
+                get_buf_state(q, prev_buf(bufnr), &state, 0);
+                if (state != SLSB_CU_OUTPUT_PRIMED)
                        rc = qdio_kick_outbound_q(q);
                else
-                        if ((q->irq_ptr->ssqd_desc.mmwc > 1) &&
+                        qperf_inc(q, fast_requeue);
-                            (count > 1) &&
-                            (count <= q->irq_ptr->ssqd_desc.mmwc)) {
-                                /* exploit enhanced SIGA */
-                                q->u.out.use_enh_siga = 1;
-                                rc = qdio_kick_outbound_q(q);
-                        } else {
-                                /*
-                                * One siga-w per buffer required for unicast
-                                * HiperSockets.
-                                */
-                                q->u.out.use_enh_siga = 0;
-                                while (count--) {
-                                        rc = qdio_kick_outbound_q(q);
-                                        if (rc)
-                                                goto out;
-                                }
-                        }
-                goto out;
-        }
-        if (need_siga_sync(q)) {
-                qdio_siga_sync_q(q);
-                goto out;
        }
-        /* try to fast requeue buffers */
+        /* in case of SIGA errors we must process the error immediately */
-        get_buf_state(q, prev_buf(bufnr), &state, 0);
+        if (used >= q->u.out.scan_threshold || rc)
-        if (state != SLSB_CU_OUTPUT_PRIMED)
+                tasklet_schedule(&q->tasklet);
-                rc = qdio_kick_outbound_q(q);
        else
-                qperf_inc(q, fast_requeue);
+                /* free the SBALs in case of no further traffic */
+                if (!timer_pending(&q->u.out.timer))
-out:
+                        mod_timer(&q->u.out.timer, jiffies + HZ);
-        tasklet_schedule(&q->tasklet);
        return rc;
 }
@@ -1550,7 +1539,7 @@ int qdio_start_irq(struct ccw_device *cdev, int nr)
        WARN_ON(queue_irqs_enabled(q));
-        if (!shared_ind(q->irq_ptr))
+        if (!shared_ind(q->irq_ptr->dsci))
                xchg(q->irq_ptr->dsci, 0);
        qdio_stop_polling(q);
@@ -1560,7 +1549,7 @@ int qdio_start_irq(struct ccw_device *cdev, int nr)
         * We need to check again to not lose initiative after
         * resetting the ACK state.
         */
-        if (!shared_ind(q->irq_ptr) && *q->irq_ptr->dsci)
+        if (!shared_ind(q->irq_ptr->dsci) && *q->irq_ptr->dsci)
                goto rescan;
        if (!qdio_inbound_q_done(q))
                goto rescan;
@@ -1600,12 +1589,14 @@ int qdio_get_next_buffers(struct ccw_device *cdev, int nr, int *bufnr,
        q = irq_ptr->input_qs[nr];
        WARN_ON(queue_irqs_enabled(q));
-        qdio_sync_after_thinint(q);
        /*
-         * The interrupt could be caused by a PCI request. Check the
+         * Cannot rely on automatic sync after interrupt since queues may
-         * PCI capable outbound queues.
+         * also be examined without interrupt.
         */
+        if (need_siga_sync(q))
+                qdio_sync_queues(q);
+        /* check the PCI capable outbound queues. */
        qdio_check_outbound_after_thinint(q);
        if (!qdio_inbound_q_moved(q))
diff --git a/drivers/s390/cio/qdio_setup.c b/drivers/s390/cio/qdio_setup.c
index a13cf7ec64b2..89107d0938c4 100644
--- a/drivers/s390/cio/qdio_setup.c
+++ b/drivers/s390/cio/qdio_setup.c
@@ -178,6 +178,7 @@ static void setup_queues(struct qdio_irq *irq_ptr,
                setup_queues_misc(q, irq_ptr, qdio_init->output_handler, i);
                q->is_input_q = 0;
+                q->u.out.scan_threshold = qdio_init->scan_threshold;
                setup_storage_lists(q, irq_ptr, output_sbal_array, i);
                output_sbal_array += QDIO_MAX_BUFFERS_PER_Q;
@@ -196,14 +197,10 @@ static void process_ac_flags(struct qdio_irq *irq_ptr, unsigned char qdioac)
                irq_ptr->siga_flag.output = 1;
        if (qdioac & AC1_SIGA_SYNC_NEEDED)
                irq_ptr->siga_flag.sync = 1;
-        if (qdioac & AC1_AUTOMATIC_SYNC_ON_THININT)
+        if (!(qdioac & AC1_AUTOMATIC_SYNC_ON_THININT))
-                irq_ptr->siga_flag.no_sync_ti = 1;
+                irq_ptr->siga_flag.sync_after_ai = 1;
-        if (qdioac & AC1_AUTOMATIC_SYNC_ON_OUT_PCI)
+        if (!(qdioac & AC1_AUTOMATIC_SYNC_ON_OUT_PCI))
-                irq_ptr->siga_flag.no_sync_out_pci = 1;
+                irq_ptr->siga_flag.sync_out_after_pci = 1;
-        if (irq_ptr->siga_flag.no_sync_out_pci &&
-            irq_ptr->siga_flag.no_sync_ti)
-                irq_ptr->siga_flag.no_sync_out_ti = 1;
 }
 static void check_and_setup_qebsm(struct qdio_irq *irq_ptr,
@@ -451,7 +448,7 @@ void qdio_print_subchannel_info(struct qdio_irq *irq_ptr,
        char s[80];
        snprintf(s, 80, "qdio: %s %s on SC %x using "
-                 "AI:%d QEBSM:%d PCI:%d TDD:%d SIGA:%s%s%s%s%s%s\n",
+                 "AI:%d QEBSM:%d PCI:%d TDD:%d SIGA:%s%s%s%s%s\n",
                 dev_name(&cdev->dev),
                 (irq_ptr->qib.qfmt == QDIO_QETH_QFMT) ? "OSA" :
                        ((irq_ptr->qib.qfmt == QDIO_ZFCP_QFMT) ? "ZFCP" : "HS"),
@@ -463,9 +460,8 @@ void qdio_print_subchannel_info(struct qdio_irq *irq_ptr,
                 (irq_ptr->siga_flag.input) ? "R" : " ",
                 (irq_ptr->siga_flag.output) ? "W" : " ",
                 (irq_ptr->siga_flag.sync) ? "S" : " ",
-                 (!irq_ptr->siga_flag.no_sync_ti) ? "A" : " ",
+                 (irq_ptr->siga_flag.sync_after_ai) ? "A" : " ",
-                 (!irq_ptr->siga_flag.no_sync_out_ti) ? "O" : " ",
+                 (irq_ptr->siga_flag.sync_out_after_pci) ? "P" : " ");
-                 (!irq_ptr->siga_flag.no_sync_out_pci) ? "P" : " ");
        printk(KERN_INFO "%s", s);
 }
diff --git a/drivers/s390/cio/qdio_thinint.c b/drivers/s390/cio/qdio_thinint.c
index 5d9c66627b6e..5c4e741d8221 100644
--- a/drivers/s390/cio/qdio_thinint.c
+++ b/drivers/s390/cio/qdio_thinint.c
@@ -8,6 +8,7 @@
 */
 #include <linux/io.h>
 #include <linux/slab.h>
+#include <linux/kernel_stat.h>
 #include <asm/atomic.h>
 #include <asm/debug.h>
 #include <asm/qdio.h>
@@ -35,22 +36,8 @@ static u8 *tiqdio_alsi;
 struct indicator_t *q_indicators;
-static int css_qdio_omit_svs;
 static u64 last_ai_time;
-static inline unsigned long do_clear_global_summary(void)
-{
-        register unsigned long __fn asm("1") = 3;
-        register unsigned long __tmp asm("2");
-        register unsigned long __time asm("3");
-        asm volatile(
-                "       .insn   rre,0xb2650000,2,0"
-                : "+d" (__fn), "=d" (__tmp), "=d" (__time));
-        return __time;
-}
 /* returns addr for the device state change indicator */
 static u32 *get_indicator(void)
 {
@@ -83,10 +70,6 @@ void tiqdio_add_input_queues(struct qdio_irq *irq_ptr)
        struct qdio_q *q;
        int i;
-        /* No TDD facility? If we must use SIGA-s we can also omit SVS. */
-        if (!css_qdio_omit_svs && irq_ptr->siga_flag.sync)
-                css_qdio_omit_svs = 1;
        mutex_lock(&tiq_list_lock);
        for_each_input_queue(irq_ptr, q, i)
                list_add_rcu(&q->entry, &tiq_list);
@@ -112,9 +95,9 @@ void tiqdio_remove_input_queues(struct qdio_irq *irq_ptr)
        }
 }
-static inline int shared_ind_used(void)
+static inline u32 shared_ind_set(void)
 {
-        return atomic_read(&q_indicators[TIQDIO_SHARED_IND].count);
+        return q_indicators[TIQDIO_SHARED_IND].ind;
 }
 /**
@@ -124,20 +107,11 @@ static inline int shared_ind_used(void)
 */
 static void tiqdio_thinint_handler(void *alsi, void *data)
 {
+        u32 si_used = shared_ind_set();
        struct qdio_q *q;
        last_ai_time = S390_lowcore.int_clock;
+        kstat_cpu(smp_processor_id()).irqs[IOINT_QAI]++;
-        /*
-         * SVS only when needed: issue SVS to benefit from iqdio interrupt
-         * avoidance (SVS clears adapter interrupt suppression overwrite).
-         */
-        if (!css_qdio_omit_svs)
-                do_clear_global_summary();
-        /* reset local summary indicator */
-        if (shared_ind_used())
-                xchg(tiqdio_alsi, 0);
        /* protect tiq_list entries, only changed in activate or shutdown */
        rcu_read_lock();
@@ -146,7 +120,10 @@ static void tiqdio_thinint_handler(void *alsi, void *data)
        list_for_each_entry_rcu(q, &tiq_list, entry) {
                /* only process queues from changed sets */
-                if (!*q->irq_ptr->dsci)
+                if (unlikely(shared_ind(q->irq_ptr->dsci))) {
+                        if (!si_used)
+                                continue;
+                } else if (!*q->irq_ptr->dsci)
                        continue;
                if (q->u.in.queue_start_poll) {
@@ -162,7 +139,7 @@ static void tiqdio_thinint_handler(void *alsi, void *data)
                                                 q->irq_ptr->int_parm);
                } else {
                        /* only clear it if the indicator is non-shared */
-                        if (!shared_ind(q->irq_ptr))
+                        if (!shared_ind(q->irq_ptr->dsci))
                                xchg(q->irq_ptr->dsci, 0);
                        /*
                         * Call inbound processing but not directly
@@ -178,13 +155,8 @@ static void tiqdio_thinint_handler(void *alsi, void *data)
         * If the shared indicator was used clear it now after all queues
         * were processed.
         */
-        if (shared_ind_used()) {
+        if (si_used && shared_ind_set())
                xchg(&q_indicators[TIQDIO_SHARED_IND].ind, 0);
-                /* prevent racing */
-                if (*tiqdio_alsi)
-                        xchg(&q_indicators[TIQDIO_SHARED_IND].ind, 1 << 7);
-        }
 }
 static int set_subchannel_ind(struct qdio_irq *irq_ptr, int reset)
@@ -269,12 +241,6 @@ int qdio_establish_thinint(struct qdio_irq *irq_ptr)
 {
        if (!is_thinint_irq(irq_ptr))
                return 0;
-        /* Check for aif time delay disablement. If installed,
-         * omit SVS even under LPAR
-         */
-        if (css_general_characteristics.aif_tdd)
-                css_qdio_omit_svs = 1;
        return set_subchannel_ind(irq_ptr, 0);
 }
diff --git a/drivers/s390/crypto/ap_bus.c b/drivers/s390/crypto/ap_bus.c
index 8fd8c62455e9..67302b944ab3 100644
--- a/drivers/s390/crypto/ap_bus.c
+++ b/drivers/s390/crypto/ap_bus.c
@@ -27,6 +27,7 @@
 #define KMSG_COMPONENT "ap"
 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#include <linux/kernel_stat.h>
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/delay.h>
@@ -154,7 +155,7 @@ static inline int ap_instructions_available(void)
 */
 static int ap_interrupts_available(void)
 {
-        return test_facility(1) && test_facility(2);
+        return test_facility(2) && test_facility(65);
 }
 /**
@@ -221,6 +222,69 @@ ap_queue_interruption_control(ap_qid_t qid, void *ind)
 }
 #endif
+static inline struct ap_queue_status __ap_4096_commands_available(ap_qid_t qid,
+                                                                  int *support)
+{
+        register unsigned long reg0 asm ("0") = 0UL | qid | (1UL << 23);
+        register struct ap_queue_status reg1 asm ("1");
+        register unsigned long reg2 asm ("2") = 0UL;
+        asm volatile(
+                ".long 0xb2af0000\n"
+                "0: la    %1,0\n"
+                "1:\n"
+                EX_TABLE(0b, 1b)
+                : "+d" (reg0), "=d" (reg1), "=d" (reg2)
+                :
+                : "cc");
+        if (reg2 & 0x6000000000000000ULL)
+                *support = 1;
+        else
+                *support = 0;
+        return reg1;
+}
+/**
+ * ap_4096_commands_availablen(): Check for availability of 4096 bit RSA
+ * support.
+ * @qid: The AP queue number
+ *
+ * Returns 1 if 4096 bit RSA keys are support fo the AP, returns 0 if not.
+ */
+int ap_4096_commands_available(ap_qid_t qid)
+{
+        struct ap_queue_status status;
+        int i, support = 0;
+        status = __ap_4096_commands_available(qid, &support);
+        for (i = 0; i < AP_MAX_RESET; i++) {
+                switch (status.response_code) {
+                case AP_RESPONSE_NORMAL:
+                        return support;
+                case AP_RESPONSE_RESET_IN_PROGRESS:
+                case AP_RESPONSE_BUSY:
+                        break;
+                case AP_RESPONSE_Q_NOT_AVAIL:
+                case AP_RESPONSE_DECONFIGURED:
+                case AP_RESPONSE_CHECKSTOPPED:
+                case AP_RESPONSE_INVALID_ADDRESS:
+                        return 0;
+                case AP_RESPONSE_OTHERWISE_CHANGED:
+                        break;
+                default:
+                        break;
+                }
+                if (i < AP_MAX_RESET - 1) {
+                        udelay(5);
+                        status = __ap_4096_commands_available(qid, &support);
+                }
+        }
+        return support;
+}
+EXPORT_SYMBOL(ap_4096_commands_available);
 /**
 * ap_queue_enable_interruption(): Enable interruption on an AP.
 * @qid: The AP queue number
@@ -1042,6 +1106,7 @@ out:
 static void ap_interrupt_handler(void *unused1, void *unused2)
 {
+        kstat_cpu(smp_processor_id()).irqs[IOINT_APB]++;
        tasklet_schedule(&ap_tasklet);
 }
diff --git a/drivers/s390/crypto/ap_bus.h b/drivers/s390/crypto/ap_bus.h
index 4785d07cd447..08b9738285b4 100644
--- a/drivers/s390/crypto/ap_bus.h
+++ b/drivers/s390/crypto/ap_bus.h
@@ -196,4 +196,6 @@ void ap_flush_queue(struct ap_device *ap_dev);
 int ap_module_init(void);
 void ap_module_exit(void);
+int ap_4096_commands_available(ap_qid_t qid);
 #endif /* _AP_BUS_H_ */
diff --git a/drivers/s390/crypto/zcrypt_api.c b/drivers/s390/crypto/zcrypt_api.c
index 7fca9c10ffcf..8e65447f76b7 100644
--- a/drivers/s390/crypto/zcrypt_api.c
+++ b/drivers/s390/crypto/zcrypt_api.c
@@ -396,8 +396,15 @@ static long zcrypt_rsa_crt(struct ica_rsa_modexpo_crt *crt)
                        if (copied == 0) {
                                unsigned int len;
                                spin_unlock_bh(&zcrypt_device_lock);
-                                /* len is max 256 / 2 - 120 = 8 */
+                                /* len is max 256 / 2 - 120 = 8
-                                len = crt->inputdatalength / 2 - 120;
+                                 * For bigger device just assume len of leading
+                                 * 0s is 8 as stated in the requirements for
+                                 * ica_rsa_modexpo_crt struct in zcrypt.h.
+                                 */
+                                if (crt->inputdatalength <= 256)
+                                        len = crt->inputdatalength / 2 - 120;
+                                else
+                                        len = 8;
                                if (len > sizeof(z1))
                                        return -EFAULT;
                                z1 = z2 = z3 = 0;
@@ -405,6 +412,7 @@ static long zcrypt_rsa_crt(struct ica_rsa_modexpo_crt *crt)
                                    copy_from_user(&z2, crt->bp_key, len) ||
                                    copy_from_user(&z3, crt->u_mult_inv, len))
                                        return -EFAULT;
+                                z1 = z2 = z3 = 0;
                                copied = 1;
                                /*
                                 * We have to restart device lookup -
diff --git a/drivers/s390/crypto/zcrypt_api.h b/drivers/s390/crypto/zcrypt_api.h
index 8e7ffbf2466c..88ebd114735b 100644
--- a/drivers/s390/crypto/zcrypt_api.h
+++ b/drivers/s390/crypto/zcrypt_api.h
@@ -109,6 +109,7 @@ struct zcrypt_device {
        int request_count;              /* # current requests. */
        struct ap_message reply;        /* Per-device reply structure. */
+        int max_exp_bit_length;
 };
 struct zcrypt_device *zcrypt_device_alloc(size_t);
diff --git a/drivers/s390/crypto/zcrypt_cex2a.c b/drivers/s390/crypto/zcrypt_cex2a.c
index 9c409efa1ecf..2176d00b395e 100644
--- a/drivers/s390/crypto/zcrypt_cex2a.c
+++ b/drivers/s390/crypto/zcrypt_cex2a.c
@@ -41,7 +41,7 @@
 #define CEX2A_MIN_MOD_SIZE        1     /*    8 bits    */
 #define CEX2A_MAX_MOD_SIZE      256     /* 2048 bits    */
 #define CEX3A_MIN_MOD_SIZE      CEX2A_MIN_MOD_SIZE
-#define CEX3A_MAX_MOD_SIZE      CEX2A_MAX_MOD_SIZE
+#define CEX3A_MAX_MOD_SIZE      512     /* 4096 bits    */
 #define CEX2A_SPEED_RATING      970
 #define CEX3A_SPEED_RATING      900 /* Fixme: Needs finetuning */
@@ -49,8 +49,10 @@
 #define CEX2A_MAX_MESSAGE_SIZE  0x390   /* sizeof(struct type50_crb2_msg)    */
 #define CEX2A_MAX_RESPONSE_SIZE 0x110   /* max outputdatalength + type80_hdr */
-#define CEX3A_MAX_MESSAGE_SIZE  CEX2A_MAX_MESSAGE_SIZE
+#define CEX3A_MAX_RESPONSE_SIZE 0x210   /* 512 bit modulus
-#define CEX3A_MAX_RESPONSE_SIZE CEX2A_MAX_RESPONSE_SIZE
+                                         * (max outputdatalength) +
+                                         * type80_hdr*/
+#define CEX3A_MAX_MESSAGE_SIZE  sizeof(struct type50_crb3_msg)
 #define CEX2A_CLEANUP_TIME      (15*HZ)
 #define CEX3A_CLEANUP_TIME      CEX2A_CLEANUP_TIME
@@ -110,7 +112,7 @@ static int ICAMEX_msg_to_type50MEX_msg(struct zcrypt_device *zdev,
                mod = meb1->modulus + sizeof(meb1->modulus) - mod_len;
                exp = meb1->exponent + sizeof(meb1->exponent) - mod_len;
                inp = meb1->message + sizeof(meb1->message) - mod_len;
-        } else {
+        } else if (mod_len <= 256) {
                struct type50_meb2_msg *meb2 = ap_msg->message;
                memset(meb2, 0, sizeof(*meb2));
                ap_msg->length = sizeof(*meb2);
@@ -120,6 +122,17 @@ static int ICAMEX_msg_to_type50MEX_msg(struct zcrypt_device *zdev,
                mod = meb2->modulus + sizeof(meb2->modulus) - mod_len;
                exp = meb2->exponent + sizeof(meb2->exponent) - mod_len;
                inp = meb2->message + sizeof(meb2->message) - mod_len;
+        } else {
+                /* mod_len > 256 = 4096 bit RSA Key */
+                struct type50_meb3_msg *meb3 = ap_msg->message;
+                memset(meb3, 0, sizeof(*meb3));
+                ap_msg->length = sizeof(*meb3);
+                meb3->header.msg_type_code = TYPE50_TYPE_CODE;
+                meb3->header.msg_len = sizeof(*meb3);
+                meb3->keyblock_type = TYPE50_MEB3_FMT;
+                mod = meb3->modulus + sizeof(meb3->modulus) - mod_len;
+                exp = meb3->exponent + sizeof(meb3->exponent) - mod_len;
+                inp = meb3->message + sizeof(meb3->message) - mod_len;
        }
        if (copy_from_user(mod, mex->n_modulus, mod_len) ||
@@ -142,7 +155,7 @@ static int ICACRT_msg_to_type50CRT_msg(struct zcrypt_device *zdev,
                                       struct ap_message *ap_msg,
                                       struct ica_rsa_modexpo_crt *crt)
 {
-        int mod_len, short_len, long_len, long_offset;
+        int mod_len, short_len, long_len, long_offset, limit;
        unsigned char *p, *q, *dp, *dq, *u, *inp;
        mod_len = crt->inputdatalength;
@@ -152,14 +165,20 @@ static int ICACRT_msg_to_type50CRT_msg(struct zcrypt_device *zdev,
        /*
         * CEX2A cannot handle p, dp, or U > 128 bytes.
         * If we have one of these, we need to do extra checking.
+         * For CEX3A the limit is 256 bytes.
         */
-        if (long_len > 128) {
+        if (zdev->max_mod_size == CEX3A_MAX_MOD_SIZE)
+                limit = 256;
+        else
+                limit = 128;
+        if (long_len > limit) {
                /*
                 * zcrypt_rsa_crt already checked for the leading
                 * zeroes of np_prime, bp_key and u_mult_inc.
                 */
-                long_offset = long_len - 128;
+                long_offset = long_len - limit;
-                long_len = 128;
+                long_len = limit;
        } else
                long_offset = 0;
@@ -180,7 +199,7 @@ static int ICACRT_msg_to_type50CRT_msg(struct zcrypt_device *zdev,
                dq = crb1->dq + sizeof(crb1->dq) - short_len;
                u = crb1->u + sizeof(crb1->u) - long_len;
                inp = crb1->message + sizeof(crb1->message) - mod_len;
-        } else {
+        } else if (long_len <= 128) {
                struct type50_crb2_msg *crb2 = ap_msg->message;
                memset(crb2, 0, sizeof(*crb2));
                ap_msg->length = sizeof(*crb2);
@@ -193,6 +212,20 @@ static int ICACRT_msg_to_type50CRT_msg(struct zcrypt_device *zdev,
                dq = crb2->dq + sizeof(crb2->dq) - short_len;
                u = crb2->u + sizeof(crb2->u) - long_len;
                inp = crb2->message + sizeof(crb2->message) - mod_len;
+        } else {
+                /* long_len >= 256 */
+                struct type50_crb3_msg *crb3 = ap_msg->message;
+                memset(crb3, 0, sizeof(*crb3));
+                ap_msg->length = sizeof(*crb3);
+                crb3->header.msg_type_code = TYPE50_TYPE_CODE;
+                crb3->header.msg_len = sizeof(*crb3);
+                crb3->keyblock_type = TYPE50_CRB3_FMT;
+                p = crb3->p + sizeof(crb3->p) - long_len;
+                q = crb3->q + sizeof(crb3->q) - short_len;
+                dp = crb3->dp + sizeof(crb3->dp) - long_len;
+                dq = crb3->dq + sizeof(crb3->dq) - short_len;
+                u = crb3->u + sizeof(crb3->u) - long_len;
+                inp = crb3->message + sizeof(crb3->message) - mod_len;
        }
        if (copy_from_user(p, crt->np_prime + long_offset, long_len) ||
@@ -203,7 +236,6 @@ static int ICACRT_msg_to_type50CRT_msg(struct zcrypt_device *zdev,
            copy_from_user(inp, crt->inputdata, mod_len))
                return -EFAULT;
        return 0;
 }
@@ -230,7 +262,10 @@ static int convert_type80(struct zcrypt_device *zdev,
                zdev->online = 0;
                return -EAGAIN; /* repeat the request on a different device. */
        }
-        BUG_ON(t80h->len > CEX2A_MAX_RESPONSE_SIZE);
+        if (zdev->user_space_type == ZCRYPT_CEX2A)
+                BUG_ON(t80h->len > CEX2A_MAX_RESPONSE_SIZE);
+        else
+                BUG_ON(t80h->len > CEX3A_MAX_RESPONSE_SIZE);
        data = reply->message + t80h->len - outputdatalength;
        if (copy_to_user(outputdata, data, outputdatalength))
                return -EFAULT;
@@ -282,7 +317,10 @@ static void zcrypt_cex2a_receive(struct ap_device *ap_dev,
        }
        t80h = reply->message;
        if (t80h->type == TYPE80_RSP_CODE) {
-                length = min(CEX2A_MAX_RESPONSE_SIZE, (int) t80h->len);
+                if (ap_dev->device_type == AP_DEVICE_TYPE_CEX2A)
+                        length = min(CEX2A_MAX_RESPONSE_SIZE, (int) t80h->len);
+                else
+                        length = min(CEX3A_MAX_RESPONSE_SIZE, (int) t80h->len);
                memcpy(msg->message, reply->message, length);
        } else
                memcpy(msg->message, reply->message, sizeof error_reply);
@@ -307,7 +345,10 @@ static long zcrypt_cex2a_modexpo(struct zcrypt_device *zdev,
        int rc;
        ap_init_message(&ap_msg);
-        ap_msg.message = kmalloc(CEX2A_MAX_MESSAGE_SIZE, GFP_KERNEL);
+        if (zdev->user_space_type == ZCRYPT_CEX2A)
+                ap_msg.message = kmalloc(CEX2A_MAX_MESSAGE_SIZE, GFP_KERNEL);
+        else
+                ap_msg.message = kmalloc(CEX3A_MAX_MESSAGE_SIZE, GFP_KERNEL);
        if (!ap_msg.message)
                return -ENOMEM;
        ap_msg.psmid = (((unsigned long long) current->pid) << 32) +
@@ -345,7 +386,10 @@ static long zcrypt_cex2a_modexpo_crt(struct zcrypt_device *zdev,
        int rc;
        ap_init_message(&ap_msg);
-        ap_msg.message = kmalloc(CEX2A_MAX_MESSAGE_SIZE, GFP_KERNEL);
+        if (zdev->user_space_type == ZCRYPT_CEX2A)
+                ap_msg.message = kmalloc(CEX2A_MAX_MESSAGE_SIZE, GFP_KERNEL);
+        else
+                ap_msg.message = kmalloc(CEX3A_MAX_MESSAGE_SIZE, GFP_KERNEL);
        if (!ap_msg.message)
                return -ENOMEM;
        ap_msg.psmid = (((unsigned long long) current->pid) << 32) +
@@ -397,6 +441,7 @@ static int zcrypt_cex2a_probe(struct ap_device *ap_dev)
                zdev->max_mod_size = CEX2A_MAX_MOD_SIZE;
                zdev->short_crt = 1;
                zdev->speed_rating = CEX2A_SPEED_RATING;
+                zdev->max_exp_bit_length = CEX2A_MAX_MOD_SIZE;
                break;
        case AP_DEVICE_TYPE_CEX3A:
                zdev = zcrypt_device_alloc(CEX3A_MAX_RESPONSE_SIZE);
@@ -404,8 +449,13 @@ static int zcrypt_cex2a_probe(struct ap_device *ap_dev)
                        return -ENOMEM;
                zdev->user_space_type = ZCRYPT_CEX3A;
                zdev->type_string = "CEX3A";
-                zdev->min_mod_size = CEX3A_MIN_MOD_SIZE;
+                zdev->min_mod_size = CEX2A_MIN_MOD_SIZE;
-                zdev->max_mod_size = CEX3A_MAX_MOD_SIZE;
+                zdev->max_mod_size = CEX2A_MAX_MOD_SIZE;
+                zdev->max_exp_bit_length = CEX2A_MAX_MOD_SIZE;
+                if (ap_4096_commands_available(ap_dev->qid)) {
+                        zdev->max_mod_size = CEX3A_MAX_MOD_SIZE;
+                        zdev->max_exp_bit_length = CEX3A_MAX_MOD_SIZE;
+                }
                zdev->short_crt = 1;
                zdev->speed_rating = CEX3A_SPEED_RATING;
                break;
diff --git a/drivers/s390/crypto/zcrypt_cex2a.h b/drivers/s390/crypto/zcrypt_cex2a.h
index 8f69d1dacab8..0350665810cf 100644
--- a/drivers/s390/crypto/zcrypt_cex2a.h
+++ b/drivers/s390/crypto/zcrypt_cex2a.h
@@ -51,8 +51,10 @@ struct type50_hdr {
 #define TYPE50_MEB1_FMT         0x0001
 #define TYPE50_MEB2_FMT         0x0002
+#define TYPE50_MEB3_FMT         0x0003
 #define TYPE50_CRB1_FMT         0x0011
 #define TYPE50_CRB2_FMT         0x0012
+#define TYPE50_CRB3_FMT         0x0013
 /* Mod-Exp, with a small modulus */
 struct type50_meb1_msg {
@@ -74,6 +76,16 @@ struct type50_meb2_msg {
        unsigned char   message[256];
 } __attribute__((packed));
+/* Mod-Exp, with a larger modulus */
+struct type50_meb3_msg {
+        struct type50_hdr header;
+        unsigned short  keyblock_type;  /* 0x0003 */
+        unsigned char   reserved[6];
+        unsigned char   exponent[512];
+        unsigned char   modulus[512];
+        unsigned char   message[512];
+} __attribute__((packed));
 /* CRT, with a small modulus */
 struct type50_crb1_msg {
        struct type50_hdr header;
@@ -100,6 +112,19 @@ struct type50_crb2_msg {
        unsigned char   message[256];
 } __attribute__((packed));
+/* CRT, with a larger modulus */
+struct type50_crb3_msg {
+        struct type50_hdr header;
+        unsigned short  keyblock_type;  /* 0x0013 */
+        unsigned char   reserved[6];
+        unsigned char   p[256];
+        unsigned char   q[256];
+        unsigned char   dp[256];
+        unsigned char   dq[256];
+        unsigned char   u[256];
+        unsigned char   message[512];
+} __attribute__((packed));
 /**
 * The type 80 response family is associated with a CEX2A card.
 *
diff --git a/drivers/s390/crypto/zcrypt_pcica.c b/drivers/s390/crypto/zcrypt_pcica.c
index 09e934b295a0..1afb69c75fea 100644
--- a/drivers/s390/crypto/zcrypt_pcica.c
+++ b/drivers/s390/crypto/zcrypt_pcica.c
@@ -373,6 +373,7 @@ static int zcrypt_pcica_probe(struct ap_device *ap_dev)
        zdev->min_mod_size = PCICA_MIN_MOD_SIZE;
        zdev->max_mod_size = PCICA_MAX_MOD_SIZE;
        zdev->speed_rating = PCICA_SPEED_RATING;
+        zdev->max_exp_bit_length = PCICA_MAX_MOD_SIZE;
        ap_dev->reply = &zdev->reply;
        ap_dev->private = zdev;
        rc = zcrypt_device_register(zdev);
diff --git a/drivers/s390/crypto/zcrypt_pcicc.c b/drivers/s390/crypto/zcrypt_pcicc.c
index 9dec5c77cff4..aa4c050a5694 100644
--- a/drivers/s390/crypto/zcrypt_pcicc.c
+++ b/drivers/s390/crypto/zcrypt_pcicc.c
@@ -579,6 +579,7 @@ static int zcrypt_pcicc_probe(struct ap_device *ap_dev)
        zdev->min_mod_size = PCICC_MIN_MOD_SIZE;
        zdev->max_mod_size = PCICC_MAX_MOD_SIZE;
        zdev->speed_rating = PCICC_SPEED_RATING;
+        zdev->max_exp_bit_length = PCICC_MAX_MOD_SIZE;
        ap_dev->reply = &zdev->reply;
        ap_dev->private = zdev;
        rc = zcrypt_device_register(zdev);
diff --git a/drivers/s390/crypto/zcrypt_pcixcc.c b/drivers/s390/crypto/zcrypt_pcixcc.c
index 510fab4577d4..4f85eb725f4f 100644
--- a/drivers/s390/crypto/zcrypt_pcixcc.c
+++ b/drivers/s390/crypto/zcrypt_pcixcc.c
@@ -45,12 +45,12 @@
 #define PCIXCC_MIN_MOD_SIZE_OLD  64     /*  512 bits    */
 #define PCIXCC_MAX_MOD_SIZE     256     /* 2048 bits    */
 #define CEX3C_MIN_MOD_SIZE      PCIXCC_MIN_MOD_SIZE
-#define CEX3C_MAX_MOD_SIZE      PCIXCC_MAX_MOD_SIZE
+#define CEX3C_MAX_MOD_SIZE      512     /* 4096 bits    */
 #define PCIXCC_MCL2_SPEED_RATING        7870
 #define PCIXCC_MCL3_SPEED_RATING        7870
 #define CEX2C_SPEED_RATING              7000
-#define CEX3C_SPEED_RATING              6500    /* FIXME: needs finetuning */
+#define CEX3C_SPEED_RATING              6500
 #define PCIXCC_MAX_ICA_MESSAGE_SIZE 0x77c  /* max size type6 v2 crt message */
 #define PCIXCC_MAX_ICA_RESPONSE_SIZE 0x77c /* max size type86 v2 reply      */
@@ -567,6 +567,15 @@ static int convert_response_ica(struct zcrypt_device *zdev,
        case TYPE88_RSP_CODE:
                return convert_error(zdev, reply);
        case TYPE86_RSP_CODE:
+                if (msg->cprbx.ccp_rtcode &&
+                   (msg->cprbx.ccp_rscode == 0x14f) &&
+                   (outputdatalength > 256)) {
+                        if (zdev->max_exp_bit_length <= 17) {
+                                zdev->max_exp_bit_length = 17;
+                                return -EAGAIN;
+                        } else
+                                return -EINVAL;
+                }
                if (msg->hdr.reply_code)
                        return convert_error(zdev, reply);
                if (msg->cprbx.cprb_ver_id == 0x02)
@@ -1052,11 +1061,13 @@ static int zcrypt_pcixcc_probe(struct ap_device *ap_dev)
                        zdev->speed_rating = PCIXCC_MCL2_SPEED_RATING;
                        zdev->min_mod_size = PCIXCC_MIN_MOD_SIZE_OLD;
                        zdev->max_mod_size = PCIXCC_MAX_MOD_SIZE;
+                        zdev->max_exp_bit_length = PCIXCC_MAX_MOD_SIZE;
                } else {
                        zdev->type_string = "PCIXCC_MCL3";
                        zdev->speed_rating = PCIXCC_MCL3_SPEED_RATING;
                        zdev->min_mod_size = PCIXCC_MIN_MOD_SIZE;
                        zdev->max_mod_size = PCIXCC_MAX_MOD_SIZE;
+                        zdev->max_exp_bit_length = PCIXCC_MAX_MOD_SIZE;
                }
                break;
        case AP_DEVICE_TYPE_CEX2C:
@@ -1065,6 +1076,7 @@ static int zcrypt_pcixcc_probe(struct ap_device *ap_dev)
                zdev->speed_rating = CEX2C_SPEED_RATING;
                zdev->min_mod_size = PCIXCC_MIN_MOD_SIZE;
                zdev->max_mod_size = PCIXCC_MAX_MOD_SIZE;
+                zdev->max_exp_bit_length = PCIXCC_MAX_MOD_SIZE;
                break;
        case AP_DEVICE_TYPE_CEX3C:
                zdev->user_space_type = ZCRYPT_CEX3C;
@@ -1072,6 +1084,7 @@ static int zcrypt_pcixcc_probe(struct ap_device *ap_dev)
                zdev->speed_rating = CEX3C_SPEED_RATING;
                zdev->min_mod_size = CEX3C_MIN_MOD_SIZE;
                zdev->max_mod_size = CEX3C_MAX_MOD_SIZE;
+                zdev->max_exp_bit_length = CEX3C_MAX_MOD_SIZE;
                break;
        default:
                goto out_free;
diff --git a/drivers/s390/kvm/kvm_virtio.c b/drivers/s390/kvm/kvm_virtio.c
index 375aeeaf9ea5..414427d64a8f 100644
--- a/drivers/s390/kvm/kvm_virtio.c
+++ b/drivers/s390/kvm/kvm_virtio.c
@@ -10,6 +10,7 @@
 *    Author(s): Christian Borntraeger <borntraeger@de.ibm.com>
 */
+#include <linux/kernel_stat.h>
 #include <linux/init.h>
 #include <linux/bootmem.h>
 #include <linux/err.h>
@@ -25,6 +26,7 @@
 #include <asm/kvm_virtio.h>
 #include <asm/setup.h>
 #include <asm/s390_ext.h>
+#include <asm/irq.h>
 #define VIRTIO_SUBCODE_64 0x0D00
@@ -379,6 +381,7 @@ static void kvm_extint_handler(unsigned int ext_int_code,
        u16 subcode;
        u32 param;
+        kstat_cpu(smp_processor_id()).irqs[EXTINT_VRT]++;
        subcode = ext_int_code >> 16;
        if ((subcode & 0xff00) != VIRTIO_SUBCODE_64)
                return;
diff --git a/drivers/s390/net/Kconfig b/drivers/s390/net/Kconfig
index 456b18743397..fa80ba1f0344 100644
--- a/drivers/s390/net/Kconfig
+++ b/drivers/s390/net/Kconfig
@@ -2,7 +2,8 @@ menu "S/390 network device drivers"
        depends on NETDEVICES && S390
 config LCS
-        tristate "Lan Channel Station Interface"
+        def_tristate m
+        prompt "Lan Channel Station Interface"
        depends on CCW && NETDEVICES && (NET_ETHERNET || TR || FDDI)
        help
           Select this option if you want to use LCS networking on IBM System z.
@@ -12,7 +13,8 @@ config LCS
           If you do not know what it is, it's safe to choose Y.
 config CTCM
-        tristate "CTC and MPC SNA device support"
+        def_tristate m
+        prompt "CTC and MPC SNA device support"
        depends on CCW && NETDEVICES
        help
          Select this option if you want to use channel-to-channel
@@ -26,7 +28,8 @@ config CTCM
          If you do not need any channel-to-channel connection, choose N.
 config NETIUCV
-        tristate "IUCV network device support (VM only)"
+        def_tristate m
+        prompt "IUCV network device support (VM only)"
        depends on IUCV && NETDEVICES
        help
          Select this option if you want to use inter-user communication
@@ -37,14 +40,16 @@ config NETIUCV
          The module name is netiucv. If unsure, choose Y.
 config SMSGIUCV
-        tristate "IUCV special message support (VM only)"
+        def_tristate m
+        prompt "IUCV special message support (VM only)"
        depends on IUCV
        help
          Select this option if you want to be able to receive SMSG messages
          from other VM guest systems.
 config SMSGIUCV_EVENT
-        tristate "Deliver IUCV special messages as uevents (VM only)"
+        def_tristate m
+        prompt "Deliver IUCV special messages as uevents (VM only)"
        depends on SMSGIUCV
        help
          Select this option to deliver CP special messages (SMSGs) as
@@ -54,7 +59,8 @@ config SMSGIUCV_EVENT
          To compile as a module, choose M. The module name is "smsgiucv_app".
 config CLAW
-        tristate "CLAW device support"
+        def_tristate m
+        prompt "CLAW device support"
        depends on CCW && NETDEVICES
        help
          This driver supports channel attached CLAW devices.
@@ -64,7 +70,8 @@ config CLAW
          To compile into the kernel, choose Y.
 config QETH
-        tristate "Gigabit Ethernet device support"
+        def_tristate y
+        prompt "Gigabit Ethernet device support"
        depends on CCW && NETDEVICES && IP_MULTICAST && QDIO
        help
          This driver supports the IBM System z OSA Express adapters
@@ -78,25 +85,25 @@ config QETH
          The module name is qeth.
 config QETH_L2
-        tristate "qeth layer 2 device support"
+        def_tristate y
-        depends on QETH
+        prompt "qeth layer 2 device support"
-        help
+        depends on QETH
-          Select this option to be able to run qeth devices in layer 2 mode.
+        help
-          To compile as a module, choose M. The module name is qeth_l2.
+          Select this option to be able to run qeth devices in layer 2 mode.
-          If unsure, choose y.
+          To compile as a module, choose M. The module name is qeth_l2.
+          If unsure, choose y.
 config QETH_L3
-        tristate "qeth layer 3 device support"
+        def_tristate y
-        depends on QETH
+        prompt "qeth layer 3 device support"
-        help
+        depends on QETH
-          Select this option to be able to run qeth devices in layer 3 mode.
+        help
-          To compile as a module choose M. The module name is qeth_l3.
+          Select this option to be able to run qeth devices in layer 3 mode.
-          If unsure, choose Y.
+          To compile as a module choose M. The module name is qeth_l3.
+          If unsure, choose Y.
 config QETH_IPV6
-        bool
+        def_bool y if (QETH_L3 = IPV6) || (QETH_L3 && IPV6 = 'y')
-        depends on (QETH_L3 = IPV6) || (QETH_L3 && IPV6 = 'y')
-        default y
 config CCWGROUP
        tristate
diff --git a/drivers/s390/net/claw.c b/drivers/s390/net/claw.c
index 8e4153d740f3..ce3a5c13ce0b 100644
--- a/drivers/s390/net/claw.c
+++ b/drivers/s390/net/claw.c
@@ -63,6 +63,7 @@
 #define KMSG_COMPONENT "claw"
+#include <linux/kernel_stat.h>
 #include <asm/ccwdev.h>
 #include <asm/ccwgroup.h>
 #include <asm/debug.h>
@@ -640,6 +641,7 @@ claw_irq_handler(struct ccw_device *cdev,
        struct claw_env  *p_env;
        struct chbk *p_ch_r=NULL;
+        kstat_cpu(smp_processor_id()).irqs[IOINT_CLW]++;
        CLAW_DBF_TEXT(4, trace, "clawirq");
        /* Bypass all 'unsolicited interrupts' */
        privptr = dev_get_drvdata(&cdev->dev);
diff --git a/drivers/s390/net/ctcm_main.c b/drivers/s390/net/ctcm_main.c
index 2c7d2d9be4d0..4c2845985927 100644
--- a/drivers/s390/net/ctcm_main.c
+++ b/drivers/s390/net/ctcm_main.c
@@ -24,6 +24,7 @@
 #define KMSG_COMPONENT "ctcm"
 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#include <linux/kernel_stat.h>
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/kernel.h>
@@ -1204,6 +1205,7 @@ static void ctcm_irq_handler(struct ccw_device *cdev,
        int cstat;
        int dstat;
+        kstat_cpu(smp_processor_id()).irqs[IOINT_CTC]++;
        CTCM_DBF_TEXT_(TRACE, CTC_DBF_DEBUG,
                "Enter %s(%s)", CTCM_FUNTAIL, dev_name(&cdev->dev));
diff --git a/drivers/s390/net/lcs.c b/drivers/s390/net/lcs.c
index c9f13b9ea339..09e7a053c844 100644
--- a/drivers/s390/net/lcs.c
+++ b/drivers/s390/net/lcs.c
@@ -26,6 +26,7 @@
 #define KMSG_COMPONENT          "lcs"
 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#include <linux/kernel_stat.h>
 #include <linux/module.h>
 #include <linux/if.h>
 #include <linux/netdevice.h>
@@ -1398,6 +1399,7 @@ lcs_irq(struct ccw_device *cdev, unsigned long intparm, struct irb *irb)
        int rc, index;
        int cstat, dstat;
+        kstat_cpu(smp_processor_id()).irqs[IOINT_LCS]++;
        if (lcs_check_irb_error(cdev, irb))
                return;
diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c
index b7d9dc0adc62..29f848bfc12f 100644
--- a/drivers/s390/net/qeth_core_main.c
+++ b/drivers/s390/net/qeth_core_main.c
@@ -3831,6 +3831,8 @@ static int qeth_qdio_establish(struct qeth_card *card)
        init_data.int_parm               = (unsigned long) card;
        init_data.input_sbal_addr_array  = (void **) in_sbal_ptrs;
        init_data.output_sbal_addr_array = (void **) out_sbal_ptrs;
+        init_data.scan_threshold =
+                (card->info.type == QETH_CARD_TYPE_IQD) ? 8 : 32;
        if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ALLOCATED,
                QETH_QDIO_ESTABLISHED) == QETH_QDIO_ALLOCATED) {
diff --git a/drivers/s390/scsi/zfcp_qdio.c b/drivers/s390/scsi/zfcp_qdio.c
index 2511f92302dd..8da5ed644c2b 100644
--- a/drivers/s390/scsi/zfcp_qdio.c
+++ b/drivers/s390/scsi/zfcp_qdio.c
@@ -290,6 +290,8 @@ static void zfcp_qdio_setup_init_data(struct qdio_initialize *id,
        id->int_parm = (unsigned long) qdio;
        id->input_sbal_addr_array = (void **) (qdio->res_q);
        id->output_sbal_addr_array = (void **) (qdio->req_q);
+        id->scan_threshold =
+                QDIO_MAX_BUFFERS_PER_Q - ZFCP_QDIO_MAX_SBALS_PER_REQ * 2;
 }
 /**