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[S390] cio: Register all subchannels.
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>
This commit is contained in:
Cornelia Huck
Heiko Carstens
parent
b4a33acb69
commit
0ae7a7b250
5 changed files with 86 additions and 102 deletions
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@ -12,6 +12,7 @@
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#include <linux/device.h>
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#include <asm/chpid.h>
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#include "chsc.h"
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#include "css.h"
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#define CHP_STATUS_STANDBY 0
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#define CHP_STATUS_CONFIGURED 1
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@ -2,7 +2,7 @@
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* drivers/s390/cio/cio.c
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* S/390 common I/O routines -- low level i/o calls
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*
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* Copyright (C) IBM Corp. 1999,2006
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* Copyright IBM Corp. 1999,2008
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* Author(s): Ingo Adlung (adlung@de.ibm.com)
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* Cornelia Huck (cornelia.huck@de.ibm.com)
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* Arnd Bergmann (arndb@de.ibm.com)
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@ -494,27 +494,46 @@ int cio_create_sch_lock(struct subchannel *sch)
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return 0;
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}
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/*
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* cio_validate_subchannel()
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static int cio_validate_io_subchannel(struct subchannel *sch)
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{
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/* Initialization for io subchannels. */
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if (!css_sch_is_valid(&sch->schib))
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return -ENODEV;
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/* Devno is valid. */
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if (is_blacklisted(sch->schid.ssid, sch->schib.pmcw.dev)) {
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/*
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* This device must not be known to Linux. So we simply
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* say that there is no device and return ENODEV.
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*/
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CIO_MSG_EVENT(6, "Blacklisted device detected "
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"at devno %04X, subchannel set %x\n",
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sch->schib.pmcw.dev, sch->schid.ssid);
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return -ENODEV;
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}
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return 0;
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}
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/**
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* cio_validate_subchannel - basic validation of subchannel
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* @sch: subchannel structure to be filled out
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* @schid: subchannel id
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*
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* Find out subchannel type and initialize struct subchannel.
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* Return codes:
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* SUBCHANNEL_TYPE_IO for a normal io subchannel
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* SUBCHANNEL_TYPE_CHSC for a chsc subchannel
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* SUBCHANNEL_TYPE_MESSAGE for a messaging subchannel
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* SUBCHANNEL_TYPE_ADM for a adm(?) subchannel
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* 0 on success
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* -ENXIO for non-defined subchannels
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* -ENODEV for subchannels with invalid device number or blacklisted devices
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* -ENODEV for invalid subchannels or blacklisted devices
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* -EIO for subchannels in an invalid subchannel set
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*/
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int
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cio_validate_subchannel (struct subchannel *sch, struct subchannel_id schid)
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int cio_validate_subchannel(struct subchannel *sch, struct subchannel_id schid)
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{
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char dbf_txt[15];
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int ccode;
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int err;
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sprintf (dbf_txt, "valsch%x", schid.sch_no);
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CIO_TRACE_EVENT (4, dbf_txt);
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sprintf(dbf_txt, "valsch%x", schid.sch_no);
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CIO_TRACE_EVENT(4, dbf_txt);
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/* Nuke all fields. */
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memset(sch, 0, sizeof(struct subchannel));
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@ -545,68 +564,18 @@ cio_validate_subchannel (struct subchannel *sch, struct subchannel_id schid)
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}
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/* Copy subchannel type from path management control word. */
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sch->st = sch->schib.pmcw.st;
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/*
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* ... just being curious we check for non I/O subchannels
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*/
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if (sch->st != 0) {
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CIO_MSG_EVENT(4, "Subchannel 0.%x.%04x reports "
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"non-I/O subchannel type %04X\n",
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sch->schid.ssid, sch->schid.sch_no, sch->st);
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/* We stop here for non-io subchannels. */
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err = sch->st;
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switch (sch->st) {
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case SUBCHANNEL_TYPE_IO:
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err = cio_validate_io_subchannel(sch);
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break;
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default:
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err = 0;
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}
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if (err)
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goto out;
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}
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/* Initialization for io subchannels. */
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if (!css_sch_is_valid(&sch->schib)) {
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err = -ENODEV;
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goto out;
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}
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/* Devno is valid. */
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if (is_blacklisted (sch->schid.ssid, sch->schib.pmcw.dev)) {
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/*
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* This device must not be known to Linux. So we simply
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* say that there is no device and return ENODEV.
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*/
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CIO_MSG_EVENT(6, "Blacklisted device detected "
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"at devno %04X, subchannel set %x\n",
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sch->schib.pmcw.dev, sch->schid.ssid);
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err = -ENODEV;
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goto out;
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}
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if (cio_is_console(sch->schid)) {
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sch->opm = 0xff;
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sch->isc = 1;
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} else {
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sch->opm = chp_get_sch_opm(sch);
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sch->isc = 3;
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}
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sch->lpm = sch->schib.pmcw.pam & sch->opm;
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CIO_MSG_EVENT(6, "Detected device %04x on subchannel 0.%x.%04X "
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"- PIM = %02X, PAM = %02X, POM = %02X\n",
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sch->schib.pmcw.dev, sch->schid.ssid,
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sch->schid.sch_no, sch->schib.pmcw.pim,
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sch->schib.pmcw.pam, sch->schib.pmcw.pom);
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/*
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* We now have to initially ...
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* ... enable "concurrent sense"
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* ... enable "multipath mode" if more than one
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* CHPID is available. This is done regardless
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* whether multiple paths are available for us.
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*/
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sch->schib.pmcw.csense = 1; /* concurrent sense */
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sch->schib.pmcw.ena = 0;
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if ((sch->lpm & (sch->lpm - 1)) != 0)
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sch->schib.pmcw.mp = 1; /* multipath mode */
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/* clean up possible residual cmf stuff */
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sch->schib.pmcw.mme = 0;
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sch->schib.pmcw.mbfc = 0;
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sch->schib.pmcw.mbi = 0;
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sch->schib.mba = 0;
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CIO_MSG_EVENT(4, "Subchannel 0.%x.%04x reports subchannel type %04X\n",
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sch->schid.ssid, sch->schid.sch_no, sch->st);
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return 0;
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out:
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if (!cio_is_console(schid))
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@ -793,7 +762,6 @@ cio_probe_console(void)
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* enable console I/O-interrupt subclass 1
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*/
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ctl_set_bit(6, 30);
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console_subchannel.isc = 1;
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console_subchannel.schib.pmcw.isc = 1;
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console_subchannel.schib.pmcw.intparm =
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(u32)(addr_t)&console_subchannel;
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@ -864,7 +832,7 @@ static void udelay_reset(unsigned long usecs)
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}
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static int
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__clear_subchannel_easy(struct subchannel_id schid)
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__clear_io_subchannel_easy(struct subchannel_id schid)
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{
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int retry;
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@ -921,11 +889,19 @@ static int __shutdown_subchannel_easy(struct subchannel_id schid, void *data)
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case -ENODEV:
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break;
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default: /* -EBUSY */
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if (__clear_subchannel_easy(schid))
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break; /* give up... */
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switch (schib.pmcw.st) {
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case SUBCHANNEL_TYPE_IO:
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if (__clear_io_subchannel_easy(schid))
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goto out; /* give up... */
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break;
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default:
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/* No default clear strategy */
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break;
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}
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stsch(schid, &schib);
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__disable_subchannel_easy(schid, &schib);
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}
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out:
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return 0;
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}
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@ -121,25 +121,6 @@ css_alloc_subchannel(struct subchannel_id schid)
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kfree(sch);
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return ERR_PTR(ret);
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}
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if (sch->st != SUBCHANNEL_TYPE_IO) {
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/* For now we ignore all non-io subchannels. */
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kfree(sch);
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return ERR_PTR(-EINVAL);
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}
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/*
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* Set intparm to subchannel address.
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* This is fine even on 64bit since the subchannel is always located
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* under 2G.
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*/
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sch->schib.pmcw.intparm = (u32)(addr_t)sch;
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ret = cio_modify(sch);
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if (ret) {
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kfree(sch->lock);
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kfree(sch);
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return ERR_PTR(ret);
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}
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return sch;
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}
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@ -60,8 +60,6 @@ struct pgid {
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/*
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* A css driver handles all subchannels of one type.
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* Currently, we only care about I/O subchannels (type 0), these
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* have a ccw_device connected to them.
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*/
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struct subchannel;
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struct css_driver {
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@ -24,6 +24,7 @@
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#include <asm/param.h> /* HZ */
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#include <asm/cmb.h>
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#include "chp.h"
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#include "cio.h"
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#include "cio_debug.h"
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#include "css.h"
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@ -1037,7 +1038,6 @@ io_subchannel_recog(struct ccw_device *cdev, struct subchannel *sch)
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struct ccw_device_private *priv;
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sch_set_cdev(sch, cdev);
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sch->driver = &io_subchannel_driver;
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cdev->ccwlock = sch->lock;
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/* Init private data. */
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@ -1122,8 +1122,33 @@ static void io_subchannel_irq(struct subchannel *sch)
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dev_fsm_event(cdev, DEV_EVENT_INTERRUPT);
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}
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static int
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io_subchannel_probe (struct subchannel *sch)
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static void io_subchannel_init_fields(struct subchannel *sch)
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{
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if (cio_is_console(sch->schid))
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sch->opm = 0xff;
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else
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sch->opm = chp_get_sch_opm(sch);
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sch->lpm = sch->schib.pmcw.pam & sch->opm;
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sch->isc = cio_is_console(sch->schid) ? 1 : 3;
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CIO_MSG_EVENT(6, "Detected device %04x on subchannel 0.%x.%04X"
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" - PIM = %02X, PAM = %02X, POM = %02X\n",
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sch->schib.pmcw.dev, sch->schid.ssid,
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sch->schid.sch_no, sch->schib.pmcw.pim,
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sch->schib.pmcw.pam, sch->schib.pmcw.pom);
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/* Initially set up some fields in the pmcw. */
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sch->schib.pmcw.ena = 0;
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sch->schib.pmcw.csense = 1; /* concurrent sense */
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if ((sch->lpm & (sch->lpm - 1)) != 0)
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sch->schib.pmcw.mp = 1; /* multipath mode */
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/* clean up possible residual cmf stuff */
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sch->schib.pmcw.mme = 0;
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sch->schib.pmcw.mbfc = 0;
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sch->schib.pmcw.mbi = 0;
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sch->schib.mba = 0;
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}
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static int io_subchannel_probe(struct subchannel *sch)
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{
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struct ccw_device *cdev;
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int rc;
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@ -1152,6 +1177,7 @@ io_subchannel_probe (struct subchannel *sch)
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get_device(&cdev->dev);
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return 0;
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}
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io_subchannel_init_fields(sch);
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/*
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* First check if a fitting device may be found amongst the
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* disconnected devices or in the orphanage.
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@ -1297,14 +1323,16 @@ spinlock_t * cio_get_console_lock(void)
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return &ccw_console_lock;
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}
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static int
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ccw_device_console_enable (struct ccw_device *cdev, struct subchannel *sch)
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static int ccw_device_console_enable(struct ccw_device *cdev,
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struct subchannel *sch)
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{
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int rc;
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/* Attach subchannel private data. */
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sch->private = cio_get_console_priv();
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memset(sch->private, 0, sizeof(struct io_subchannel_private));
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io_subchannel_init_fields(sch);
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sch->driver = &io_subchannel_driver;
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/* Initialize the ccw_device structure. */
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cdev->dev.parent= &sch->dev;
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rc = io_subchannel_recog(cdev, sch);
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