[S390] cio: Base message subchannel handling.
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>
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@ -498,13 +498,8 @@ int cio_create_sch_lock(struct subchannel *sch)
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return 0;
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}
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static int cio_validate_io_subchannel(struct subchannel *sch)
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static int cio_check_devno_blacklisted(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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@ -518,6 +513,26 @@ static int cio_validate_io_subchannel(struct subchannel *sch)
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return 0;
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}
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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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return cio_check_devno_blacklisted(sch);
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}
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static int cio_validate_msg_subchannel(struct subchannel *sch)
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{
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/* Initialization for message 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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return cio_check_devno_blacklisted(sch);
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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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@ -573,6 +588,9 @@ int cio_validate_subchannel(struct subchannel *sch, struct subchannel_id schid)
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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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case SUBCHANNEL_TYPE_MSG:
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err = cio_validate_msg_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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@ -14,7 +14,7 @@
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struct pmcw {
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u32 intparm; /* interruption parameter */
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u32 qf : 1; /* qdio facility */
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u32 res0 : 1; /* reserved zeros */
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u32 w : 1;
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u32 isc : 3; /* interruption sublass */
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u32 res5 : 3; /* reserved zeros */
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u32 ena : 1; /* enabled */
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@ -332,6 +332,8 @@ int css_sch_is_valid(struct schib *schib)
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{
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if ((schib->pmcw.st == SUBCHANNEL_TYPE_IO) && !schib->pmcw.dnv)
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return 0;
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if ((schib->pmcw.st == SUBCHANNEL_TYPE_MSG) && !schib->pmcw.w)
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return 0;
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return 1;
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}
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EXPORT_SYMBOL_GPL(css_sch_is_valid);
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