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[S390] cio: Register all subchannels.

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Register all valid subchannels, not only I/O subchannels.
Move I/O subchannel specific initialization to io_subchannel_probe().

Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Esse commit está contido em:
Cornelia Huck
2008-07-14 09:58:43 +02:00
commit de Heiko Carstens
pai b4a33acb69
commit 0ae7a7b250
5 arquivos alterados com 86 adições e 102 exclusões
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128
drivers/s390/cio/cio.c
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@@ -2,7 +2,7 @@
* drivers/s390/cio/cio.c
* S/390 common I/O routines -- low level i/o calls
*
* Copyright (C) IBM Corp. 1999,2006
* Copyright IBM Corp. 1999,2008
* Author(s): Ingo Adlung (adlung@de.ibm.com)
* Cornelia Huck (cornelia.huck@de.ibm.com)
* Arnd Bergmann (arndb@de.ibm.com)
@@ -494,27 +494,46 @@ int cio_create_sch_lock(struct subchannel *sch)
return 0;
}
/*
* cio_validate_subchannel()
static int cio_validate_io_subchannel(struct subchannel *sch)
{
/* Initialization for io subchannels. */
if (!css_sch_is_valid(&sch->schib))
return -ENODEV;
/* Devno is valid. */
if (is_blacklisted(sch->schid.ssid, sch->schib.pmcw.dev)) {
/*
* This device must not be known to Linux. So we simply
* say that there is no device and return ENODEV.
*/
CIO_MSG_EVENT(6, "Blacklisted device detected "
"at devno %04X, subchannel set %x\n",
sch->schib.pmcw.dev, sch->schid.ssid);
return -ENODEV;
}
return 0;
}
/**
* cio_validate_subchannel - basic validation of subchannel
* @sch: subchannel structure to be filled out
* @schid: subchannel id
*
* Find out subchannel type and initialize struct subchannel.
* Return codes:
* SUBCHANNEL_TYPE_IO for a normal io subchannel
* SUBCHANNEL_TYPE_CHSC for a chsc subchannel
* SUBCHANNEL_TYPE_MESSAGE for a messaging subchannel
* SUBCHANNEL_TYPE_ADM for a adm(?) subchannel
* 0 on success
* -ENXIO for non-defined subchannels
* -ENODEV for subchannels with invalid device number or blacklisted devices
* -ENODEV for invalid subchannels or blacklisted devices
* -EIO for subchannels in an invalid subchannel set
*/
int
cio_validate_subchannel (struct subchannel *sch, struct subchannel_id schid)
int cio_validate_subchannel(struct subchannel *sch, struct subchannel_id schid)
{
char dbf_txt[15];
int ccode;
int err;
sprintf (dbf_txt, "valsch%x", schid.sch_no);
CIO_TRACE_EVENT (4, dbf_txt);
sprintf(dbf_txt, "valsch%x", schid.sch_no);
CIO_TRACE_EVENT(4, dbf_txt);
/* Nuke all fields. */
memset(sch, 0, sizeof(struct subchannel));
@@ -545,68 +564,18 @@ cio_validate_subchannel (struct subchannel *sch, struct subchannel_id schid)
}
/* Copy subchannel type from path management control word. */
sch->st = sch->schib.pmcw.st;
/*
* ... just being curious we check for non I/O subchannels
*/
if (sch->st != 0) {
CIO_MSG_EVENT(4, "Subchannel 0.%x.%04x reports "
"non-I/O subchannel type %04X\n",
sch->schid.ssid, sch->schid.sch_no, sch->st);
/* We stop here for non-io subchannels. */
err = sch->st;
switch (sch->st) {
case SUBCHANNEL_TYPE_IO:
err = cio_validate_io_subchannel(sch);
break;
default:
err = 0;
}
if (err)
goto out;
}
/* Initialization for io subchannels. */
if (!css_sch_is_valid(&sch->schib)) {
err = -ENODEV;
goto out;
}
/* Devno is valid. */
if (is_blacklisted (sch->schid.ssid, sch->schib.pmcw.dev)) {
/*
* This device must not be known to Linux. So we simply
* say that there is no device and return ENODEV.
*/
CIO_MSG_EVENT(6, "Blacklisted device detected "
"at devno %04X, subchannel set %x\n",
sch->schib.pmcw.dev, sch->schid.ssid);
err = -ENODEV;
goto out;
}
if (cio_is_console(sch->schid)) {
sch->opm = 0xff;
sch->isc = 1;
} else {
sch->opm = chp_get_sch_opm(sch);
sch->isc = 3;
}
sch->lpm = sch->schib.pmcw.pam & sch->opm;
CIO_MSG_EVENT(6, "Detected device %04x on subchannel 0.%x.%04X "
"- PIM = %02X, PAM = %02X, POM = %02X\n",
sch->schib.pmcw.dev, sch->schid.ssid,
sch->schid.sch_no, sch->schib.pmcw.pim,
sch->schib.pmcw.pam, sch->schib.pmcw.pom);
/*
* We now have to initially ...
* ... enable "concurrent sense"
* ... enable "multipath mode" if more than one
* CHPID is available. This is done regardless
* whether multiple paths are available for us.
*/
sch->schib.pmcw.csense = 1; /* concurrent sense */
sch->schib.pmcw.ena = 0;
if ((sch->lpm & (sch->lpm - 1)) != 0)
sch->schib.pmcw.mp = 1; /* multipath mode */
/* clean up possible residual cmf stuff */
sch->schib.pmcw.mme = 0;
sch->schib.pmcw.mbfc = 0;
sch->schib.pmcw.mbi = 0;
sch->schib.mba = 0;
CIO_MSG_EVENT(4, "Subchannel 0.%x.%04x reports subchannel type %04X\n",
sch->schid.ssid, sch->schid.sch_no, sch->st);
return 0;
out:
if (!cio_is_console(schid))
@@ -793,7 +762,6 @@ cio_probe_console(void)
* enable console I/O-interrupt subclass 1
*/
ctl_set_bit(6, 30);
console_subchannel.isc = 1;
console_subchannel.schib.pmcw.isc = 1;
console_subchannel.schib.pmcw.intparm =
(u32)(addr_t)&console_subchannel;
@@ -864,7 +832,7 @@ static void udelay_reset(unsigned long usecs)
}
static int
__clear_subchannel_easy(struct subchannel_id schid)
__clear_io_subchannel_easy(struct subchannel_id schid)
{
int retry;
@@ -921,11 +889,19 @@ static int __shutdown_subchannel_easy(struct subchannel_id schid, void *data)
case -ENODEV:
break;
default: /* -EBUSY */
if (__clear_subchannel_easy(schid))
break; /* give up... */
switch (schib.pmcw.st) {
case SUBCHANNEL_TYPE_IO:
if (__clear_io_subchannel_easy(schid))
goto out; /* give up... */
break;
default:
/* No default clear strategy */
break;
}
stsch(schid, &schib);
__disable_subchannel_easy(schid, &schib);
}
out:
return 0;
}