[S390] cio: introduce fcx enabled scsw format

Extend the scsw data structure to the format required by fcx. Also
provide helper functions for easier access to fields which are present
in both the traditional as well as the modified format.

Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>

1 files changed, 65 insertions, 68 deletions

diff --git a/drivers/s390/cio/device_status.c b/drivers/s390/cio/device_status.c
index 4a38993000f2..1b03c5423be2 100644
--- a/drivers/s390/cio/device_status.c
+++ b/drivers/s390/cio/device_status.c
@@ -29,9 +29,11 @@
 static void
 ccw_device_msg_control_check(struct ccw_device *cdev, struct irb *irb)
 {
-	if (!(irb->scsw.cstat & (SCHN_STAT_CHN_DATA_CHK |
-				 SCHN_STAT_CHN_CTRL_CHK |
-				 SCHN_STAT_INTF_CTRL_CHK)))
+	char dbf_text[15];
+
+	if (!scsw_is_valid_cstat(&irb->scsw) ||
+	    !(scsw_cstat(&irb->scsw) & (SCHN_STAT_CHN_DATA_CHK |
+	      SCHN_STAT_CHN_CTRL_CHK | SCHN_STAT_INTF_CTRL_CHK)))
 		return;
 	CIO_MSG_EVENT(0, "Channel-Check or Interface-Control-Check "
 		      "received"
@@ -39,15 +41,10 @@ ccw_device_msg_control_check(struct ccw_device *cdev, struct irb *irb)
 		      ": %02X sch_stat : %02X\n",
 		      cdev->private->dev_id.devno, cdev->private->schid.ssid,
 		      cdev->private->schid.sch_no,
-		      irb->scsw.dstat, irb->scsw.cstat);
-
-	if (irb->scsw.cc != 3) {
-		char dbf_text[15];
-
-		sprintf(dbf_text, "chk%x", cdev->private->schid.sch_no);
-		CIO_TRACE_EVENT(0, dbf_text);
-		CIO_HEX_EVENT(0, irb, sizeof (struct irb));
-	}
+		      scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw));
+	sprintf(dbf_text, "chk%x", cdev->private->schid.sch_no);
+	CIO_TRACE_EVENT(0, dbf_text);
+	CIO_HEX_EVENT(0, irb, sizeof(struct irb));
 }
 
 /*
@@ -81,12 +78,12 @@ ccw_device_accumulate_ecw(struct ccw_device *cdev, struct irb *irb)
 	 * are condition that have to be met for the extended control
 	 * bit to have meaning. Sick.
 	 */
-	cdev->private->irb.scsw.ectl = 0;
-	if ((irb->scsw.stctl & SCSW_STCTL_ALERT_STATUS) &&
-	    !(irb->scsw.stctl & SCSW_STCTL_INTER_STATUS))
-		cdev->private->irb.scsw.ectl = irb->scsw.ectl;
+	cdev->private->irb.scsw.cmd.ectl = 0;
+	if ((irb->scsw.cmd.stctl & SCSW_STCTL_ALERT_STATUS) &&
+	    !(irb->scsw.cmd.stctl & SCSW_STCTL_INTER_STATUS))
+		cdev->private->irb.scsw.cmd.ectl = irb->scsw.cmd.ectl;
 	/* Check if extended control word is valid. */
-	if (!cdev->private->irb.scsw.ectl)
+	if (!cdev->private->irb.scsw.cmd.ectl)
 		return;
 	/* Copy concurrent sense / model dependent information. */
 	memcpy (&cdev->private->irb.ecw, irb->ecw, sizeof (irb->ecw));
@@ -98,11 +95,12 @@ ccw_device_accumulate_ecw(struct ccw_device *cdev, struct irb *irb)
 static int
 ccw_device_accumulate_esw_valid(struct irb *irb)
 {
-	if (!irb->scsw.eswf && irb->scsw.stctl == SCSW_STCTL_STATUS_PEND)
+	if (!irb->scsw.cmd.eswf &&
+	    (irb->scsw.cmd.stctl == SCSW_STCTL_STATUS_PEND))
 		return 0;
-	if (irb->scsw.stctl == 
-	    		(SCSW_STCTL_INTER_STATUS|SCSW_STCTL_STATUS_PEND) &&
-	    !(irb->scsw.actl & SCSW_ACTL_SUSPENDED))
+	if (irb->scsw.cmd.stctl ==
+			(SCSW_STCTL_INTER_STATUS|SCSW_STCTL_STATUS_PEND) &&
+	    !(irb->scsw.cmd.actl & SCSW_ACTL_SUSPENDED))
 		return 0;
 	return 1;
 }
@@ -125,7 +123,7 @@ ccw_device_accumulate_esw(struct ccw_device *cdev, struct irb *irb)
 	cdev_irb->esw.esw1.lpum = irb->esw.esw1.lpum;
 
 	/* Copy subchannel logout information if esw is of format 0. */
-	if (irb->scsw.eswf) {
+	if (irb->scsw.cmd.eswf) {
 		cdev_sublog = &cdev_irb->esw.esw0.sublog;
 		sublog = &irb->esw.esw0.sublog;
 		/* Copy extended status flags. */
@@ -134,7 +132,7 @@ ccw_device_accumulate_esw(struct ccw_device *cdev, struct irb *irb)
 		 * Copy fields that have a meaning for channel data check
 		 * channel control check and interface control check.
 		 */
-		if (irb->scsw.cstat & (SCHN_STAT_CHN_DATA_CHK |
+		if (irb->scsw.cmd.cstat & (SCHN_STAT_CHN_DATA_CHK |
 				       SCHN_STAT_CHN_CTRL_CHK |
 				       SCHN_STAT_INTF_CTRL_CHK)) {
 			/* Copy ancillary report bit. */
@@ -155,7 +153,7 @@ ccw_device_accumulate_esw(struct ccw_device *cdev, struct irb *irb)
 		/* Copy i/o-error alert. */
 		cdev_sublog->ioerr = sublog->ioerr;
 		/* Copy channel path timeout bit. */
-		if (irb->scsw.cstat & SCHN_STAT_INTF_CTRL_CHK)
+		if (irb->scsw.cmd.cstat & SCHN_STAT_INTF_CTRL_CHK)
 			cdev_irb->esw.esw0.erw.cpt = irb->esw.esw0.erw.cpt;
 		/* Copy failing storage address validity flag. */
 		cdev_irb->esw.esw0.erw.fsavf = irb->esw.esw0.erw.fsavf;
@@ -200,24 +198,24 @@ ccw_device_accumulate_irb(struct ccw_device *cdev, struct irb *irb)
 	 * If not, the remaining bit have no meaning and we must ignore them.
 	 * The esw is not meaningful as well...
 	 */
-	if (!(irb->scsw.stctl & SCSW_STCTL_STATUS_PEND))
+	if (!(scsw_stctl(&irb->scsw) & SCSW_STCTL_STATUS_PEND))
 		return;
 
 	/* Check for channel checks and interface control checks. */
 	ccw_device_msg_control_check(cdev, irb);
 
 	/* Check for path not operational. */
-	if (irb->scsw.pno && irb->scsw.fctl != 0 &&
-	    (!(irb->scsw.stctl & SCSW_STCTL_INTER_STATUS) ||
-	     (irb->scsw.actl & SCSW_ACTL_SUSPENDED)))
+	if (scsw_is_valid_pno(&irb->scsw) && scsw_pno(&irb->scsw))
 		ccw_device_path_notoper(cdev);
-
+	/* No irb accumulation for transport mode irbs. */
+	if (scsw_is_tm(&irb->scsw)) {
+		memcpy(&cdev->private->irb, irb, sizeof(struct irb));
+		return;
+	}
 	/*
 	 * Don't accumulate unsolicited interrupts.
 	 */
-	if ((irb->scsw.stctl ==
-	     (SCSW_STCTL_STATUS_PEND | SCSW_STCTL_ALERT_STATUS)) &&
-	    (!irb->scsw.cc))
+	if (!scsw_is_solicited(&irb->scsw))
 		return;
 
 	cdev_irb = &cdev->private->irb;
@@ -227,62 +225,63 @@ ccw_device_accumulate_irb(struct ccw_device *cdev, struct irb *irb)
 	 * status at the subchannel has been cleared and we must not pass
 	 * intermediate accumulated status to the device driver.
 	 */
-	if (irb->scsw.fctl & SCSW_FCTL_CLEAR_FUNC)
+	if (irb->scsw.cmd.fctl & SCSW_FCTL_CLEAR_FUNC)
 		memset(&cdev->private->irb, 0, sizeof(struct irb));
 
 	/* Copy bits which are valid only for the start function. */
-	if (irb->scsw.fctl & SCSW_FCTL_START_FUNC) {
+	if (irb->scsw.cmd.fctl & SCSW_FCTL_START_FUNC) {
 		/* Copy key. */
-		cdev_irb->scsw.key = irb->scsw.key;
+		cdev_irb->scsw.cmd.key = irb->scsw.cmd.key;
 		/* Copy suspend control bit. */
-		cdev_irb->scsw.sctl = irb->scsw.sctl;
+		cdev_irb->scsw.cmd.sctl = irb->scsw.cmd.sctl;
 		/* Accumulate deferred condition code. */
-		cdev_irb->scsw.cc |= irb->scsw.cc;
+		cdev_irb->scsw.cmd.cc |= irb->scsw.cmd.cc;
 		/* Copy ccw format bit. */
-		cdev_irb->scsw.fmt = irb->scsw.fmt;
+		cdev_irb->scsw.cmd.fmt = irb->scsw.cmd.fmt;
 		/* Copy prefetch bit. */
-		cdev_irb->scsw.pfch = irb->scsw.pfch;
+		cdev_irb->scsw.cmd.pfch = irb->scsw.cmd.pfch;
 		/* Copy initial-status-interruption-control. */
-		cdev_irb->scsw.isic = irb->scsw.isic;
+		cdev_irb->scsw.cmd.isic = irb->scsw.cmd.isic;
 		/* Copy address limit checking control. */
-		cdev_irb->scsw.alcc = irb->scsw.alcc;
+		cdev_irb->scsw.cmd.alcc = irb->scsw.cmd.alcc;
 		/* Copy suppress suspend bit. */
-		cdev_irb->scsw.ssi = irb->scsw.ssi;
+		cdev_irb->scsw.cmd.ssi = irb->scsw.cmd.ssi;
 	}
 
 	/* Take care of the extended control bit and extended control word. */
 	ccw_device_accumulate_ecw(cdev, irb);
 	    
 	/* Accumulate function control. */
-	cdev_irb->scsw.fctl |= irb->scsw.fctl;
+	cdev_irb->scsw.cmd.fctl |= irb->scsw.cmd.fctl;
 	/* Copy activity control. */
-	cdev_irb->scsw.actl= irb->scsw.actl;
+	cdev_irb->scsw.cmd.actl = irb->scsw.cmd.actl;
 	/* Accumulate status control. */
-	cdev_irb->scsw.stctl |= irb->scsw.stctl;
+	cdev_irb->scsw.cmd.stctl |= irb->scsw.cmd.stctl;
 	/*
 	 * Copy ccw address if it is valid. This is a bit simplified
 	 * but should be close enough for all practical purposes.
 	 */
-	if ((irb->scsw.stctl & SCSW_STCTL_PRIM_STATUS) ||
-	    ((irb->scsw.stctl == 
+	if ((irb->scsw.cmd.stctl & SCSW_STCTL_PRIM_STATUS) ||
+	    ((irb->scsw.cmd.stctl ==
 	      (SCSW_STCTL_INTER_STATUS|SCSW_STCTL_STATUS_PEND)) &&
-	     (irb->scsw.actl & SCSW_ACTL_DEVACT) &&
-	     (irb->scsw.actl & SCSW_ACTL_SCHACT)) ||
-	    (irb->scsw.actl & SCSW_ACTL_SUSPENDED))
-		cdev_irb->scsw.cpa = irb->scsw.cpa;
+	     (irb->scsw.cmd.actl & SCSW_ACTL_DEVACT) &&
+	     (irb->scsw.cmd.actl & SCSW_ACTL_SCHACT)) ||
+	    (irb->scsw.cmd.actl & SCSW_ACTL_SUSPENDED))
+		cdev_irb->scsw.cmd.cpa = irb->scsw.cmd.cpa;
 	/* Accumulate device status, but not the device busy flag. */
-	cdev_irb->scsw.dstat &= ~DEV_STAT_BUSY;
+	cdev_irb->scsw.cmd.dstat &= ~DEV_STAT_BUSY;
 	/* dstat is not always valid. */
-	if (irb->scsw.stctl &
+	if (irb->scsw.cmd.stctl &
 	    (SCSW_STCTL_PRIM_STATUS | SCSW_STCTL_SEC_STATUS
 	     | SCSW_STCTL_INTER_STATUS | SCSW_STCTL_ALERT_STATUS))
-		cdev_irb->scsw.dstat |= irb->scsw.dstat;
+		cdev_irb->scsw.cmd.dstat |= irb->scsw.cmd.dstat;
 	/* Accumulate subchannel status. */
-	cdev_irb->scsw.cstat |= irb->scsw.cstat;
+	cdev_irb->scsw.cmd.cstat |= irb->scsw.cmd.cstat;
 	/* Copy residual count if it is valid. */
-	if ((irb->scsw.stctl & SCSW_STCTL_PRIM_STATUS) &&
-	    (irb->scsw.cstat & ~(SCHN_STAT_PCI | SCHN_STAT_INCORR_LEN)) == 0)
-		cdev_irb->scsw.count = irb->scsw.count;
+	if ((irb->scsw.cmd.stctl & SCSW_STCTL_PRIM_STATUS) &&
+	    (irb->scsw.cmd.cstat & ~(SCHN_STAT_PCI | SCHN_STAT_INCORR_LEN))
+	     == 0)
+		cdev_irb->scsw.cmd.count = irb->scsw.cmd.count;
 
 	/* Take care of bits in the extended status word. */
 	ccw_device_accumulate_esw(cdev, irb);
@@ -299,7 +298,7 @@ ccw_device_accumulate_irb(struct ccw_device *cdev, struct irb *irb)
 	 *	 sense facility available/supported when enabling the
 	 *	 concurrent sense facility.
 	 */
-	if ((cdev_irb->scsw.dstat & DEV_STAT_UNIT_CHECK) &&
+	if ((cdev_irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) &&
 	    !(cdev_irb->esw.esw0.erw.cons))
 		cdev->private->flags.dosense = 1;
 }
@@ -317,7 +316,7 @@ ccw_device_do_sense(struct ccw_device *cdev, struct irb *irb)
 	sch = to_subchannel(cdev->dev.parent);
 
 	/* A sense is required, can we do it now ? */
-	if ((irb->scsw.actl  & (SCSW_ACTL_DEVACT | SCSW_ACTL_SCHACT)) != 0)
+	if (scsw_actl(&irb->scsw) & (SCSW_ACTL_DEVACT | SCSW_ACTL_SCHACT))
 		/*
 		 * we received an Unit Check but we have no final
 		 *  status yet, therefore we must delay the SENSE
@@ -355,20 +354,18 @@ ccw_device_accumulate_basic_sense(struct ccw_device *cdev, struct irb *irb)
 	 * If not, the remaining bit have no meaning and we must ignore them.
 	 * The esw is not meaningful as well...
 	 */
-	if (!(irb->scsw.stctl & SCSW_STCTL_STATUS_PEND))
+	if (!(scsw_stctl(&irb->scsw) & SCSW_STCTL_STATUS_PEND))
 		return;
 
 	/* Check for channel checks and interface control checks. */
 	ccw_device_msg_control_check(cdev, irb);
 
 	/* Check for path not operational. */
-	if (irb->scsw.pno && irb->scsw.fctl != 0 &&
-	    (!(irb->scsw.stctl & SCSW_STCTL_INTER_STATUS) ||
-	     (irb->scsw.actl & SCSW_ACTL_SUSPENDED)))
+	if (scsw_is_valid_pno(&irb->scsw) && scsw_pno(&irb->scsw))
 		ccw_device_path_notoper(cdev);
 
-	if (!(irb->scsw.dstat & DEV_STAT_UNIT_CHECK) &&
-	    (irb->scsw.dstat & DEV_STAT_CHN_END)) {
+	if (!(irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) &&
+	    (irb->scsw.cmd.dstat & DEV_STAT_CHN_END)) {
 		cdev->private->irb.esw.esw0.erw.cons = 1;
 		cdev->private->flags.dosense = 0;
 	}
@@ -386,11 +383,11 @@ int
 ccw_device_accumulate_and_sense(struct ccw_device *cdev, struct irb *irb)
 {
 	ccw_device_accumulate_irb(cdev, irb);
-	if ((irb->scsw.actl  & (SCSW_ACTL_DEVACT | SCSW_ACTL_SCHACT)) != 0)
+	if ((irb->scsw.cmd.actl  & (SCSW_ACTL_DEVACT | SCSW_ACTL_SCHACT)) != 0)
 		return -EBUSY;
 	/* Check for basic sense. */
 	if (cdev->private->flags.dosense &&
-	    !(irb->scsw.dstat & DEV_STAT_UNIT_CHECK)) {
+	    !(irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK)) {
 		cdev->private->irb.esw.esw0.erw.cons = 1;
 		cdev->private->flags.dosense = 0;
 		return 0;