X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=drivers%2Fs390%2Fcio%2Fdevice_pgid.c;h=85b1020a1fcce51e6371852fa4cf12c5d6cca772;hb=43bc926fffd92024b46cafaf7350d669ba9ca884;hp=b7f3e63cb759083afd46a57e61cd89252a4de5a8;hpb=5273a3df6485dc2ad6aa7ddd441b9a21970f003b;p=linux-2.6.git

diff --git a/drivers/s390/cio/device_pgid.c b/drivers/s390/cio/device_pgid.c
index b7f3e63cb..85b1020a1 100644
--- a/drivers/s390/cio/device_pgid.c
+++ b/drivers/s390/cio/device_pgid.c
@@ -3,7 +3,7 @@
  *
  *    Copyright (C) 2002 IBM Deutschland Entwicklung GmbH,
  *			 IBM Corporation
- *    Author(s): Cornelia Huck(cohuck@de.ibm.com)
+ *    Author(s): Cornelia Huck (cornelia.huck@de.ibm.com)
  *		 Martin Schwidefsky (schwidefsky@de.ibm.com)
  *
  * Path Group ID functions.
@@ -22,6 +22,7 @@
 #include "cio_debug.h"
 #include "css.h"
 #include "device.h"
+#include "ioasm.h"
 
 /*
  * Start Sense Path Group ID helper function. Used in ccw_device_recog
@@ -56,10 +57,10 @@ __ccw_device_sense_pgid_start(struct ccw_device *cdev)
 			if (ret != -EACCES)
 				return ret;
 			CIO_MSG_EVENT(2, "SNID - Device %04x on Subchannel "
-				      "%04x, lpm %02X, became 'not "
+				      "0.%x.%04x, lpm %02X, became 'not "
 				      "operational'\n",
-				      cdev->private->devno, sch->irq,
-				      cdev->private->imask);
+				      cdev->private->devno, sch->schid.ssid,
+				      sch->schid.sch_no, cdev->private->imask);
 
 		}
 		cdev->private->imask >>= 1;
@@ -105,10 +106,10 @@ __ccw_device_check_sense_pgid(struct ccw_device *cdev)
 		return -EOPNOTSUPP;
 	}
 	if (irb->esw.esw0.erw.cons) {
-		CIO_MSG_EVENT(2, "SNID - device %04x, unit check, "
+		CIO_MSG_EVENT(2, "SNID - device 0.%x.%04x, unit check, "
 			      "lpum %02X, cnt %02d, sns : "
 			      "%02X%02X%02X%02X %02X%02X%02X%02X ...\n",
-			      cdev->private->devno,
+			      cdev->private->ssid, cdev->private->devno,
 			      irb->esw.esw0.sublog.lpum,
 			      irb->esw.esw0.erw.scnt,
 			      irb->ecw[0], irb->ecw[1],
@@ -118,15 +119,17 @@ __ccw_device_check_sense_pgid(struct ccw_device *cdev)
 		return -EAGAIN;
 	}
 	if (irb->scsw.cc == 3) {
-		CIO_MSG_EVENT(2, "SNID - Device %04x on Subchannel "
-			      "%04x, lpm %02X, became 'not operational'\n",
-			      cdev->private->devno, sch->irq, sch->orb.lpm);
+		CIO_MSG_EVENT(2, "SNID - Device %04x on Subchannel 0.%x.%04x,"
+			      " lpm %02X, became 'not operational'\n",
+			      cdev->private->devno, sch->schid.ssid,
+			      sch->schid.sch_no, sch->orb.lpm);
 		return -EACCES;
 	}
 	if (cdev->private->pgid.inf.ps.state2 == SNID_STATE2_RESVD_ELSE) {
-		CIO_MSG_EVENT(2, "SNID - Device %04x on Subchannel %04x "
+		CIO_MSG_EVENT(2, "SNID - Device %04x on Subchannel 0.%x.%04x "
 			      "is reserved by someone else\n",
-			      cdev->private->devno, sch->irq);
+			      cdev->private->devno, sch->schid.ssid,
+			      sch->schid.sch_no);
 		return -EUSERS;
 	}
 	return 0;
@@ -143,25 +146,26 @@ ccw_device_sense_pgid_irq(struct ccw_device *cdev, enum dev_event dev_event)
 	int ret;
 
 	irb = (struct irb *) __LC_IRB;
-	/*
-	 * Unsolicited interrupts may pertain to an earlier status pending or
-	 * busy condition on the subchannel. Retry sense pgid.
-	 */
+	/* Retry sense pgid for cc=1. */
 	if (irb->scsw.stctl ==
 	    (SCSW_STCTL_STATUS_PEND | SCSW_STCTL_ALERT_STATUS)) {
-		ret = __ccw_device_sense_pgid_start(cdev);
-		if (ret && ret != -EBUSY)
-			ccw_device_sense_pgid_done(cdev, ret);
+		if (irb->scsw.cc == 1) {
+			ret = __ccw_device_sense_pgid_start(cdev);
+			if (ret && ret != -EBUSY)
+				ccw_device_sense_pgid_done(cdev, ret);
+		}
 		return;
 	}
 	if (ccw_device_accumulate_and_sense(cdev, irb) != 0)
 		return;
 	sch = to_subchannel(cdev->dev.parent);
-	switch (__ccw_device_check_sense_pgid(cdev)) {
+	ret = __ccw_device_check_sense_pgid(cdev);
+	memset(&cdev->private->irb, 0, sizeof(struct irb));
+	switch (ret) {
 	/* 0, -ETIME, -EOPNOTSUPP, -EAGAIN, -EACCES or -EUSERS */
 	case 0:			/* Sense Path Group ID successful. */
 		if (cdev->private->pgid.inf.ps.state1 == SNID_STATE1_RESET)
-			memcpy(&cdev->private->pgid, &global_pgid,
+			memcpy(&cdev->private->pgid, &css[0]->global_pgid,
 			       sizeof(struct pgid));
 		ccw_device_sense_pgid_done(cdev, 0);
 		break;
@@ -234,8 +238,9 @@ __ccw_device_do_pgid(struct ccw_device *cdev, __u8 func)
 	sch->lpm &= ~cdev->private->imask;
 	sch->vpm &= ~cdev->private->imask;
 	CIO_MSG_EVENT(2, "SPID - Device %04x on Subchannel "
-		      "%04x, lpm %02X, became 'not operational'\n",
-		      cdev->private->devno, sch->irq, cdev->private->imask);
+		      "0.%x.%04x, lpm %02X, became 'not operational'\n",
+		      cdev->private->devno, sch->schid.ssid,
+		      sch->schid.sch_no, cdev->private->imask);
 	return ret;
 }
 
@@ -257,8 +262,10 @@ __ccw_device_check_pgid(struct ccw_device *cdev)
 		if (irb->ecw[0] & SNS0_CMD_REJECT)
 			return -EOPNOTSUPP;
 		/* Hmm, whatever happened, try again. */
-		CIO_MSG_EVENT(2, "SPID - device %04x, unit check, cnt %02d, "
+		CIO_MSG_EVENT(2, "SPID - device 0.%x.%04x, unit check, "
+			      "cnt %02d, "
 			      "sns : %02X%02X%02X%02X %02X%02X%02X%02X ...\n",
+			      cdev->private->ssid,
 			      cdev->private->devno, irb->esw.esw0.erw.scnt,
 			      irb->ecw[0], irb->ecw[1],
 			      irb->ecw[2], irb->ecw[3],
@@ -267,10 +274,10 @@ __ccw_device_check_pgid(struct ccw_device *cdev)
 		return -EAGAIN;
 	}
 	if (irb->scsw.cc == 3) {
-		CIO_MSG_EVENT(2, "SPID - Device %04x on Subchannel "
-			      "%04x, lpm %02X, became 'not operational'\n",
-			      cdev->private->devno, sch->irq,
-			      cdev->private->imask);
+		CIO_MSG_EVENT(2, "SPID - Device %04x on Subchannel 0.%x.%04x,"
+			      " lpm %02X, became 'not operational'\n",
+			      cdev->private->devno, sch->schid.ssid,
+			      sch->schid.sch_no, cdev->private->imask);
 		return -EACCES;
 	}
 	return 0;
@@ -308,21 +315,22 @@ ccw_device_verify_irq(struct ccw_device *cdev, enum dev_event dev_event)
 {
 	struct subchannel *sch;
 	struct irb *irb;
+	int ret;
 
 	irb = (struct irb *) __LC_IRB;
-	/*
-	 * Unsolicited interrupts may pertain to an earlier status pending or
-	 * busy condition on the subchannel. Restart path verification.
-	 */
+	/* Retry set pgid for cc=1. */
 	if (irb->scsw.stctl ==
 	    (SCSW_STCTL_STATUS_PEND | SCSW_STCTL_ALERT_STATUS)) {
-		__ccw_device_verify_start(cdev);
+		if (irb->scsw.cc == 1)
+			__ccw_device_verify_start(cdev);
 		return;
 	}
 	if (ccw_device_accumulate_and_sense(cdev, irb) != 0)
 		return;
 	sch = to_subchannel(cdev->dev.parent);
-	switch (__ccw_device_check_pgid(cdev)) {
+	ret = __ccw_device_check_pgid(cdev);
+	memset(&cdev->private->irb, 0, sizeof(struct irb));
+	switch (ret) {
 	/* 0, -ETIME, -EAGAIN, -EOPNOTSUPP or -EACCES */
 	case 0:
 		/* Establish or Resign Path Group done. Update vpm. */
@@ -338,6 +346,10 @@ ccw_device_verify_irq(struct ccw_device *cdev, enum dev_event dev_event)
 		 * One of those strange devices which claim to be able
 		 * to do multipathing but not for Set Path Group ID.
 		 */
+		if (cdev->private->flags.pgid_single) {
+			ccw_device_verify_done(cdev, -EOPNOTSUPP);
+			break;
+		}
 		cdev->private->flags.pgid_single = 1;
 		/* fall through. */
 	case -EAGAIN:		/* Try again. */
@@ -358,8 +370,22 @@ ccw_device_verify_irq(struct ccw_device *cdev, enum dev_event dev_event)
 void
 ccw_device_verify_start(struct ccw_device *cdev)
 {
+	struct subchannel *sch = to_subchannel(cdev->dev.parent);
+
 	cdev->private->flags.pgid_single = 0;
 	cdev->private->iretry = 5;
+	/*
+	 * Update sch->lpm with current values to catch paths becoming
+	 * available again.
+	 */
+	if (stsch(sch->schid, &sch->schib)) {
+		ccw_device_verify_done(cdev, -ENODEV);
+		return;
+	}
+	sch->lpm = sch->schib.pmcw.pim &
+		sch->schib.pmcw.pam &
+		sch->schib.pmcw.pom &
+		sch->opm;
 	__ccw_device_verify_start(cdev);
 }
 
@@ -379,7 +405,7 @@ __ccw_device_disband_start(struct ccw_device *cdev)
 		cdev->private->iretry = 5;
 		cdev->private->imask >>= 1;
 	}
-	ccw_device_verify_done(cdev, (sch->lpm != 0) ? 0 : -ENODEV);
+	ccw_device_disband_done(cdev, (sch->lpm != 0) ? 0 : -ENODEV);
 }
 
 /*
@@ -393,14 +419,18 @@ ccw_device_disband_irq(struct ccw_device *cdev, enum dev_event dev_event)
 	int ret;
 
 	irb = (struct irb *) __LC_IRB;
-	/* Ignore unsolicited interrupts. */
+	/* Retry set pgid for cc=1. */
 	if (irb->scsw.stctl ==
-	    		(SCSW_STCTL_STATUS_PEND | SCSW_STCTL_ALERT_STATUS))
+	    (SCSW_STCTL_STATUS_PEND | SCSW_STCTL_ALERT_STATUS)) {
+		if (irb->scsw.cc == 1)
+			__ccw_device_disband_start(cdev);
 		return;
+	}
 	if (ccw_device_accumulate_and_sense(cdev, irb) != 0)
 		return;
 	sch = to_subchannel(cdev->dev.parent);
 	ret = __ccw_device_check_pgid(cdev);
+	memset(&cdev->private->irb, 0, sizeof(struct irb));
 	switch (ret) {
 	/* 0, -ETIME, -EAGAIN, -EOPNOTSUPP or -EACCES */
 	case 0:			/* disband successful. */