fedora core 6 1.2949 + vserver 2.2.0

[linux-2.6.git] / drivers / s390 / cio / device_ops.c

diff --git a/drivers/s390/cio/device_ops.c b/drivers/s390/cio/device_ops.c
index 3a50b19..d269607 100644 (file)
--- a/drivers/s390/cio/device_ops.c
+++ b/drivers/s390/cio/device_ops.c
@@ -6,7 +6,6 @@
  *    Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
  *               Cornelia Huck (cornelia.huck@de.ibm.com)
  */
-#include <linux/config.h>
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/errno.h>
@@ -51,7 +50,6 @@ ccw_device_clear(struct ccw_device *cdev, unsigned long intparm)
        if (cdev->private->state == DEV_STATE_NOT_OPER)
                return -ENODEV;
        if (cdev->private->state != DEV_STATE_ONLINE &&
-           cdev->private->state != DEV_STATE_WAIT4IO &&
            cdev->private->state != DEV_STATE_W4SENSE)
                return -EINVAL;
        sch = to_subchannel(cdev->dev.parent);
@@ -78,7 +76,8 @@ ccw_device_start_key(struct ccw_device *cdev, struct ccw1 *cpa,
                return -ENODEV;
        if (cdev->private->state == DEV_STATE_NOT_OPER)
                return -ENODEV;
-       if (cdev->private->state == DEV_STATE_VERIFY) {
+       if (cdev->private->state == DEV_STATE_VERIFY ||
+           cdev->private->state == DEV_STATE_CLEAR_VERIFY) {
                /* Remember to fake irb when finished. */
                if (!cdev->private->flags.fake_irb) {
                        cdev->private->flags.fake_irb = 1;
@@ -96,6 +95,12 @@ ccw_device_start_key(struct ccw_device *cdev, struct ccw1 *cpa,
        ret = cio_set_options (sch, flags);
        if (ret)
                return ret;
+       /* Adjust requested path mask to excluded varied off paths. */
+       if (lpm) {
+               lpm &= sch->opm;
+               if (lpm == 0)
+                       return -EACCES;
+       }
        ret = cio_start_key (sch, cpa, lpm, key);
        if (ret == 0)
                cdev->private->intparm = intparm;
@@ -149,7 +154,6 @@ ccw_device_halt(struct ccw_device *cdev, unsigned long intparm)
        if (cdev->private->state == DEV_STATE_NOT_OPER)
                return -ENODEV;
        if (cdev->private->state != DEV_STATE_ONLINE &&
-           cdev->private->state != DEV_STATE_WAIT4IO &&
            cdev->private->state != DEV_STATE_W4SENSE)
                return -EINVAL;
        sch = to_subchannel(cdev->dev.parent);
@@ -210,6 +214,9 @@ ccw_device_call_handler(struct ccw_device *cdev)
              (stctl & SCSW_STCTL_PRIM_STATUS)))
                return 0;
 
+       /* Clear pending timers for device driver initiated I/O. */
+       if (ending_status)
+               ccw_device_set_timeout(cdev, 0);
        /*
         * Now we are ready to call the device driver interrupt handler.
         */
@@ -250,7 +257,7 @@ ccw_device_get_path_mask(struct ccw_device *cdev)
        if (!sch)
                return 0;
        else
-               return sch->vpm;
+               return sch->lpm;
 }
 
 static void
@@ -263,6 +270,9 @@ ccw_device_wake_up(struct ccw_device *cdev, unsigned long ip, struct irb *irb)
        /* Abuse intparm for error reporting. */
        if (IS_ERR(irb))
                cdev->private->intparm = -EIO;
+       else if (irb->scsw.cc == 1)
+               /* Retry for deferred condition code. */
+               cdev->private->intparm = -EAGAIN;
        else if ((irb->scsw.dstat !=
                  (DEV_STAT_CHN_END|DEV_STAT_DEV_END)) ||
                 (irb->scsw.cstat != 0)) {
@@ -270,15 +280,20 @@ ccw_device_wake_up(struct ccw_device *cdev, unsigned long ip, struct irb *irb)
                 * We didn't get channel end / device end. Check if path
                 * verification has been started; we can retry after it has
                 * finished. We also retry unit checks except for command reject
-                * or intervention required.
+                * or intervention required. Also check for long busy
+                * conditions.
                 */
                 if (cdev->private->flags.doverify ||
                         cdev->private->state == DEV_STATE_VERIFY)
                         cdev->private->intparm = -EAGAIN;
-                if ((irb->scsw.dstat & DEV_STAT_UNIT_CHECK) &&
-                    !(irb->ecw[0] &
-                      (SNS0_CMD_REJECT | SNS0_INTERVENTION_REQ)))
-                        cdev->private->intparm = -EAGAIN;
+               else if ((irb->scsw.dstat & DEV_STAT_UNIT_CHECK) &&
+                        !(irb->ecw[0] &
+                          (SNS0_CMD_REJECT | SNS0_INTERVENTION_REQ)))
+                       cdev->private->intparm = -EAGAIN;
+               else if ((irb->scsw.dstat & DEV_STAT_ATTENTION) &&
+                        (irb->scsw.dstat & DEV_STAT_DEV_END) &&
+                        (irb->scsw.dstat & DEV_STAT_UNIT_EXCEP))
+                       cdev->private->intparm = -EAGAIN;
                 else
                         cdev->private->intparm = -EIO;
                         
@@ -295,12 +310,15 @@ __ccw_device_retry_loop(struct ccw_device *cdev, struct ccw1 *ccw, long magic, _
 
        sch = to_subchannel(cdev->dev.parent);
        do {
+               ccw_device_set_timeout(cdev, 60 * HZ);
                ret = cio_start (sch, ccw, lpm);
-               if ((ret == -EBUSY) || (ret == -EACCES)) {
+               if (ret != 0)
+                       ccw_device_set_timeout(cdev, 0);
+               if (ret == -EBUSY) {
                        /* Try again later. */
-                       spin_unlock_irq(&sch->lock);
+                       spin_unlock_irq(sch->lock);
                        msleep(10);
-                       spin_lock_irq(&sch->lock);
+                       spin_lock_irq(sch->lock);
                        continue;
                }
                if (ret != 0)
@@ -308,12 +326,12 @@ __ccw_device_retry_loop(struct ccw_device *cdev, struct ccw1 *ccw, long magic, _
                        break;
                /* Wait for end of request. */
                cdev->private->intparm = magic;
-               spin_unlock_irq(&sch->lock);
+               spin_unlock_irq(sch->lock);
                wait_event(cdev->private->wait_q,
                           (cdev->private->intparm == -EIO) ||
                           (cdev->private->intparm == -EAGAIN) ||
                           (cdev->private->intparm == 0));
-               spin_lock_irq(&sch->lock);
+               spin_lock_irq(sch->lock);
                /* Check at least for channel end / device end */
                if (cdev->private->intparm == -EIO) {
                        /* Non-retryable error. */
@@ -324,9 +342,9 @@ __ccw_device_retry_loop(struct ccw_device *cdev, struct ccw1 *ccw, long magic, _
                        /* Success. */
                        break;
                /* Try again later. */
-               spin_unlock_irq(&sch->lock);
+               spin_unlock_irq(sch->lock);
                msleep(10);
-               spin_lock_irq(&sch->lock);
+               spin_lock_irq(sch->lock);
        } while (1);
 
        return ret;
@@ -359,10 +377,9 @@ read_dev_chars (struct ccw_device *cdev, void **buffer, int length)
        CIO_TRACE_EVENT (4, "rddevch");
        CIO_TRACE_EVENT (4, sch->dev.bus_id);
 
-       rdc_ccw = kmalloc(sizeof(struct ccw1), GFP_KERNEL | GFP_DMA);
+       rdc_ccw = kzalloc(sizeof(struct ccw1), GFP_KERNEL | GFP_DMA);
        if (!rdc_ccw)
                return -ENOMEM;
-       memset(rdc_ccw, 0, sizeof(struct ccw1));
        rdc_ccw->cmd_code = CCW_CMD_RDC;
        rdc_ccw->count = length;
        rdc_ccw->flags = CCW_FLAG_SLI;
@@ -372,7 +389,7 @@ read_dev_chars (struct ccw_device *cdev, void **buffer, int length)
                return ret;
        }
 
-       spin_lock_irq(&sch->lock);
+       spin_lock_irq(sch->lock);
        /* Save interrupt handler. */
        handler = cdev->handler;
        /* Temporarily install own handler. */
@@ -389,7 +406,7 @@ read_dev_chars (struct ccw_device *cdev, void **buffer, int length)
 
        /* Restore interrupt handler. */
        cdev->handler = handler;
-       spin_unlock_irq(&sch->lock);
+       spin_unlock_irq(sch->lock);
 
        clear_normalized_cda (rdc_ccw);
        kfree(rdc_ccw);
@@ -426,22 +443,27 @@ read_conf_data_lpm (struct ccw_device *cdev, void **buffer, int *length, __u8 lp
        if (!ciw || ciw->cmd == 0)
                return -EOPNOTSUPP;
 
-       rcd_ccw = kmalloc(sizeof(struct ccw1), GFP_KERNEL | GFP_DMA);
+       /* Adjust requested path mask to excluded varied off paths. */
+       if (lpm) {
+               lpm &= sch->opm;
+               if (lpm == 0)
+                       return -EACCES;
+       }
+
+       rcd_ccw = kzalloc(sizeof(struct ccw1), GFP_KERNEL | GFP_DMA);
        if (!rcd_ccw)
                return -ENOMEM;
-       memset(rcd_ccw, 0, sizeof(struct ccw1));
-       rcd_buf = kmalloc(ciw->count, GFP_KERNEL | GFP_DMA);
+       rcd_buf = kzalloc(ciw->count, GFP_KERNEL | GFP_DMA);
        if (!rcd_buf) {
                kfree(rcd_ccw);
                return -ENOMEM;
        }
-       memset (rcd_buf, 0, ciw->count);
        rcd_ccw->cmd_code = ciw->cmd;
        rcd_ccw->cda = (__u32) __pa (rcd_buf);
        rcd_ccw->count = ciw->count;
        rcd_ccw->flags = CCW_FLAG_SLI;
 
-       spin_lock_irq(&sch->lock);
+       spin_lock_irq(sch->lock);
        /* Save interrupt handler. */
        handler = cdev->handler;
        /* Temporarily install own handler. */
@@ -458,7 +480,7 @@ read_conf_data_lpm (struct ccw_device *cdev, void **buffer, int *length, __u8 lp
 
        /* Restore interrupt handler. */
        cdev->handler = handler;
-       spin_unlock_irq(&sch->lock);
+       spin_unlock_irq(sch->lock);
 
        /*
         * on success we update the user input parms
@@ -515,7 +537,7 @@ ccw_device_stlck(struct ccw_device *cdev)
                kfree(buf);
                return -ENOMEM;
        }
-       spin_lock_irqsave(&sch->lock, flags);
+       spin_lock_irqsave(sch->lock, flags);
        ret = cio_enable_subchannel(sch, 3);
        if (ret)
                goto out_unlock;
@@ -537,9 +559,9 @@ ccw_device_stlck(struct ccw_device *cdev)
                goto out_unlock;
        }
        cdev->private->irb.scsw.actl |= SCSW_ACTL_START_PEND;
-       spin_unlock_irqrestore(&sch->lock, flags);
+       spin_unlock_irqrestore(sch->lock, flags);
        wait_event(cdev->private->wait_q, cdev->private->irb.scsw.actl == 0);
-       spin_lock_irqsave(&sch->lock, flags);
+       spin_lock_irqsave(sch->lock, flags);
        cio_disable_subchannel(sch); //FIXME: return code?
        if ((cdev->private->irb.scsw.dstat !=
             (DEV_STAT_CHN_END|DEV_STAT_DEV_END)) ||
@@ -550,7 +572,7 @@ ccw_device_stlck(struct ccw_device *cdev)
 out_unlock:
        kfree(buf);
        kfree(buf2);
-       spin_unlock_irqrestore(&sch->lock, flags);
+       spin_unlock_irqrestore(sch->lock, flags);
        return ret;
 }
 
@@ -568,13 +590,13 @@ ccw_device_get_chp_desc(struct ccw_device *cdev, int chp_no)
 int
 _ccw_device_get_subchannel_number(struct ccw_device *cdev)
 {
-       return cdev->private->sch_no;
+       return cdev->private->schid.sch_no;
 }
 
 int
 _ccw_device_get_device_number(struct ccw_device *cdev)
 {
-       return cdev->private->devno;
+       return cdev->private->dev_id.devno;
 }