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/*
* Copyright IBM Corp. 2002
* Author(s): Cornelia Huck (cornelia.huck@de.ibm.com)
* Martin Schwidefsky (schwidefsky@de.ibm.com)
*
* Status accumulation and basic sense functions.
*/
#include <linux/module.h>
#include <linux/init.h>
#include <asm/ccwdev.h>
#include <asm/cio.h>
#include "cio.h"
#include "cio_debug.h"
#include "css.h"
#include "device.h"
#include "ioasm.h"
#include "io_sch.h"
/*
* Check for any kind of channel or interface control check but don't
* issue the message for the console device
*/
static void
ccw_device_msg_control_check(struct ccw_device *cdev, struct irb *irb)
{
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"
" ... device %04x on subchannel 0.%x.%04x, dev_stat "
": %02X sch_stat : %02X\n",
cdev->private->dev_id.devno, cdev->private->schid.ssid,
cdev->private->schid.sch_no,
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));
}
/*
* Some paths became not operational (pno bit in scsw is set).
*/
static void
ccw_device_path_notoper(struct ccw_device *cdev)
{
struct subchannel *sch;
sch = to_subchannel(cdev->dev.parent);
if (cio_update_schib(sch))
goto doverify;
CIO_MSG_EVENT(0, "%s(0.%x.%04x) - path(s) %02x are "
"not operational \n", __func__,
sch->schid.ssid, sch->schid.sch_no,
sch->schib.pmcw.pnom);
sch->lpm &= ~sch->schib.pmcw.pnom;
doverify:
cdev->private->flags.doverify = 1;
}
/*
* Copy valid bits from the extended control word to device irb.
*/
static void
ccw_device_accumulate_ecw(struct ccw_device *cdev, struct irb *irb)
{
/*
* Copy extended control bit if it is valid... yes there
* are condition that have to be met for the extended control
* bit to have meaning. Sick.
*/
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.cmd.ectl)
return;
/* Copy concurrent sense / model dependent information. */
memcpy (&cdev->private->irb.ecw, irb->ecw, sizeof (irb->ecw));
}
/*
* Check if extended status word is valid.
*/
static int
ccw_device_accumulate_esw_valid(struct irb *irb)
{
if (!irb->scsw.cmd.eswf &&
(irb->scsw.cmd.stctl == SCSW_STCTL_STATUS_PEND))
return 0;
if (irb->scsw.cmd.stctl ==
(SCSW_STCTL_INTER_STATUS|SCSW_STCTL_STATUS_PEND) &&
!(irb->scsw.cmd.actl & SCSW_ACTL_SUSPENDED))
return 0;
return 1;
}
/*
* Copy valid bits from the extended status word to device irb.
*/
static void
ccw_device_accumulate_esw(struct ccw_device *cdev, struct irb *irb)
{
struct irb *cdev_irb;
struct sublog *cdev_sublog, *sublog;
if (!ccw_device_accumulate_esw_valid(irb))
return;
cdev_irb = &cdev->private->irb;
/* Copy last path used mask. */
cdev_irb->esw.esw1.lpum = irb->esw.esw1.lpum;
/* Copy subchannel logout information if esw is of format 0. */
if (irb->scsw.cmd.eswf) {
cdev_sublog = &cdev_irb->esw.esw0.sublog;
sublog = &irb->esw.esw0.sublog;
/* Copy extended status flags. */
cdev_sublog->esf = sublog->esf;
/*
* Copy fields that have a meaning for channel data check
* channel control check and interface control check.
*/
if (irb->scsw.cmd.cstat & (SCHN_STAT_CHN_DATA_CHK |
SCHN_STAT_CHN_CTRL_CHK |
SCHN_STAT_INTF_CTRL_CHK)) {
/* Copy ancillary report bit. */
cdev_sublog->arep = sublog->arep;
/* Copy field-validity-flags. */
cdev_sublog->fvf = sublog->fvf;
/* Copy storage access code. */
cdev_sublog->sacc = sublog->sacc;
/* Copy termination code. */
cdev_sublog->termc = sublog->termc;
/* Copy sequence code. */
cdev_sublog->seqc = sublog->seqc;
}
/* Copy device status check. */
cdev_sublog->devsc = sublog->devsc;
/* Copy secondary error. */
cdev_sublog->serr = sublog->serr;
/* Copy i/o-error alert. */
cdev_sublog->ioerr = sublog->ioerr;
/* Copy channel path timeout bit. */
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;
if (cdev_irb->esw.esw0.erw.fsavf) {
/* ... and copy the failing storage address. */
memcpy(cdev_irb->esw.esw0.faddr, irb->esw.esw0.faddr,
sizeof (irb->esw.esw0.faddr));
/* ... and copy the failing storage address format. */
cdev_irb->esw.esw0.erw.fsaf = irb->esw.esw0.erw.fsaf;
}
/* Copy secondary ccw address validity bit. */
cdev_irb->esw.esw0.erw.scavf = irb->esw.esw0.erw.scavf;
if (irb->esw.esw0.erw.scavf)
/* ... and copy the secondary ccw address. */
cdev_irb->esw.esw0.saddr = irb->esw.esw0.saddr;
}
/* FIXME: DCTI for format 2? */
/* Copy authorization bit. */
cdev_irb->esw.esw0.erw.auth = irb->esw.esw0.erw.auth;
/* Copy path verification required flag. */
cdev_irb->esw.esw0.erw.pvrf = irb->esw.esw0.erw.pvrf;
if (irb->esw.esw0.erw.pvrf)
cdev->private->flags.doverify = 1;
/* Copy concurrent sense bit. */
cdev_irb->esw.esw0.erw.cons = irb->esw.esw0.erw.cons;
if (irb->esw.esw0.erw.cons)
cdev_irb->esw.esw0.erw.scnt = irb->esw.esw0.erw.scnt;
}
/*
* Accumulate status from irb to devstat.
*/
void
ccw_device_accumulate_irb(struct ccw_device *cdev, struct irb *irb)
{
struct irb *cdev_irb;
/*
* Check if the status pending bit is set in stctl.
* If not, the remaining bit have no meaning and we must ignore them.
* The esw is not meaningful as well...
*/
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 (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 (!scsw_is_solicited(&irb->scsw))
return;
cdev_irb = &cdev->private->irb;
/*
* If the clear function had been performed, all formerly pending
* status at the subchannel has been cleared and we must not pass
* intermediate accumulated status to the device driver.
*/
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.cmd.fctl & SCSW_FCTL_START_FUNC) {
/* Copy key. */
cdev_irb->scsw.cmd.key = irb->scsw.cmd.key;
/* Copy suspend control bit. */
cdev_irb->scsw.cmd.sctl = irb->scsw.cmd.sctl;
/* Accumulate deferred condition code. */
cdev_irb->scsw.cmd.cc |= irb->scsw.cmd.cc;
/* Copy ccw format bit. */
cdev_irb->scsw.cmd.fmt = irb->scsw.cmd.fmt;
/* Copy prefetch bit. */
cdev_irb->scsw.cmd.pfch
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