From b3a686f47a3615fcfec0a01c4103c50bb9621369 Mon Sep 17 00:00:00 2001 From: Cornelia Huck Date: Mon, 14 Jul 2008 09:58:48 +0200 Subject: [PATCH] [S390] cio: Base message subchannel handling. Signed-off-by: Cornelia Huck Signed-off-by: Martin Schwidefsky Signed-off-by: Heiko Carstens --- drivers/s390/cio/cio.c | 30 ++++++++++++++++++++++++------ drivers/s390/cio/cio.h | 2 +- drivers/s390/cio/css.c | 2 ++ 3 files changed, 27 insertions(+), 7 deletions(-) diff --git a/drivers/s390/cio/cio.c b/drivers/s390/cio/cio.c index be53f0ee2b1..0511fe31d04 100644 --- a/drivers/s390/cio/cio.c +++ b/drivers/s390/cio/cio.c @@ -498,13 +498,8 @@ int cio_create_sch_lock(struct subchannel *sch) return 0; } -static int cio_validate_io_subchannel(struct subchannel *sch) +static int cio_check_devno_blacklisted(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 @@ -518,6 +513,26 @@ static int cio_validate_io_subchannel(struct subchannel *sch) return 0; } +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. */ + return cio_check_devno_blacklisted(sch); +} + +static int cio_validate_msg_subchannel(struct subchannel *sch) +{ + /* Initialization for message subchannels. */ + if (!css_sch_is_valid(&sch->schib)) + return -ENODEV; + + /* Devno is valid. */ + return cio_check_devno_blacklisted(sch); +} + /** * cio_validate_subchannel - basic validation of subchannel * @sch: subchannel structure to be filled out @@ -573,6 +588,9 @@ int cio_validate_subchannel(struct subchannel *sch, struct subchannel_id schid) case SUBCHANNEL_TYPE_IO: err = cio_validate_io_subchannel(sch); break; + case SUBCHANNEL_TYPE_MSG: + err = cio_validate_msg_subchannel(sch); + break; default: err = 0; } diff --git a/drivers/s390/cio/cio.h b/drivers/s390/cio/cio.h index 4062748e834..efdb9fd4a84 100644 --- a/drivers/s390/cio/cio.h +++ b/drivers/s390/cio/cio.h @@ -14,7 +14,7 @@ struct pmcw { u32 intparm; /* interruption parameter */ u32 qf : 1; /* qdio facility */ - u32 res0 : 1; /* reserved zeros */ + u32 w : 1; u32 isc : 3; /* interruption sublass */ u32 res5 : 3; /* reserved zeros */ u32 ena : 1; /* enabled */ diff --git a/drivers/s390/cio/css.c b/drivers/s390/cio/css.c index bc3a8e4a49f..062716cf0f0 100644 --- a/drivers/s390/cio/css.c +++ b/drivers/s390/cio/css.c @@ -332,6 +332,8 @@ int css_sch_is_valid(struct schib *schib) { if ((schib->pmcw.st == SUBCHANNEL_TYPE_IO) && !schib->pmcw.dnv) return 0; + if ((schib->pmcw.st == SUBCHANNEL_TYPE_MSG) && !schib->pmcw.w) + return 0; return 1; } EXPORT_SYMBOL_GPL(css_sch_is_valid); -- 2.41.0