diff options
| author | Peter Oberparleiter <oberpar@linux.ibm.com> | 2024-03-26 17:03:24 +0100 |
|---|---|---|
| committer | Alexander Gordeev <agordeev@linux.ibm.com> | 2024-04-12 16:11:29 +0200 |
| commit | 0f987e6caa3c93f36e277624234880459848fa34 (patch) | |
| tree | 5744235695ca07609ed9848b9af1cf1e0c902472 /drivers/s390/cio/chsc.c | |
| parent | 5e6bb10ee523d85d688aacaa13405d651ad16214 (diff) | |
s390/cio: export CHPID operating speed
Add a per-CHPID sysfs attribute named "speed_bps" that provides the
operating speed of the associated channel path in bits per second,
or 0 if the operating speed is not available.
Example:
$ cat /sys/devices/css0/chp0.32/speed_bps
32G
Reviewed-by: Vineeth Vijayan <vneethv@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Peter Oberparleiter <oberpar@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Diffstat (limited to 'drivers/s390/cio/chsc.c')
| -rw-r--r-- | drivers/s390/cio/chsc.c | 20 |
1 files changed, 18 insertions, 2 deletions
diff --git a/drivers/s390/cio/chsc.c b/drivers/s390/cio/chsc.c index bfc663889fbd..dcc1e1c34ca2 100644 --- a/drivers/s390/cio/chsc.c +++ b/drivers/s390/cio/chsc.c @@ -1066,6 +1066,18 @@ chsc_initialize_cmg_chars(struct channel_path *chp, u8 cmcv, } } +static unsigned long scmc_get_speed(u32 s, u32 p) +{ + unsigned long speed = s; + + if (!p) + p = 8; + while (p--) + speed *= 10; + + return speed; +} + int chsc_get_channel_measurement_chars(struct channel_path *chp) { unsigned long flags; @@ -1086,16 +1098,19 @@ int chsc_get_channel_measurement_chars(struct channel_path *chp) u32 : 21; u32 chpid : 8; u32 cmcv : 5; - u32 : 11; + u32 : 7; + u32 cmgp : 4; u32 cmgq : 8; u32 cmg : 8; - u32 zeroes3; + u32 : 16; + u32 cmgs : 16; u32 data[NR_MEASUREMENT_CHARS]; } *scmc_area; chp->shared = -1; chp->cmg = -1; chp->extended = 0; + chp->speed = 0; if (!css_chsc_characteristics.scmc || !css_chsc_characteristics.secm) return -EINVAL; @@ -1126,6 +1141,7 @@ int chsc_get_channel_measurement_chars(struct channel_path *chp) chp->cmg = scmc_area->cmg; chp->shared = scmc_area->shared; chp->extended = scmc_area->extended; + chp->speed = scmc_get_speed(scmc_area->cmgs, scmc_area->cmgp); chsc_initialize_cmg_chars(chp, scmc_area->cmcv, (struct cmg_chars *) &scmc_area->data); out: |