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| author |   Sebastian Ott <sebott@linux.vnet.ibm.com> | 2011-01-05 12:47:56 +0100 |
|---|---|---|
| committer |   Martin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com> | 2011-01-05 12:47:28 +0100 |
| commit | ce322ccd53f2505cf8b0ed204631d6ac054ac66a (patch) | |
| tree | c3b9b9145d691b3c8a389be9299b96b574b8f69e /drivers/s390/cio/chsc.c | |
| parent | [S390] nohz: optimize arch_needs_cpu() (diff) | |
| download | linux-dev-ce322ccd53f2505cf8b0ed204631d6ac054ac66a.tar.xz linux-dev-ce322ccd53f2505cf8b0ed204631d6ac054ac66a.zip | |
[S390] cio: obtain mdc value per channel path
Add support to accumulate the number of 64K-bytes blocks all paths
to a device at least support for a transport command.
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390/cio/chsc.c')
| -rw-r--r-- | drivers/s390/cio/chsc.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/s390/cio/chsc.c b/drivers/s390/cio/chsc.c index 1aaddea673e0..0689fcf23a11 100644 --- a/drivers/s390/cio/chsc.c +++ b/drivers/s390/cio/chsc.c @@ -695,6 +695,25 @@ out: return ret; } +int chsc_determine_fmt1_channel_path_desc(struct chp_id chpid, + struct channel_path_desc_fmt1 *desc) +{ + struct chsc_response_struct *chsc_resp; + struct chsc_scpd *scpd_area; + int ret; + + spin_lock_irq(&chsc_page_lock); + scpd_area = chsc_page; + ret = chsc_determine_channel_path_desc(chpid, 0, 0, 1, 0, scpd_area); + if (ret) + goto out; + chsc_resp = (void *)&scpd_area->response; + memcpy(desc, &chsc_resp->data, sizeof(*desc)); +out: + spin_unlock_irq(&chsc_page_lock); + return ret; +} + static void chsc_initialize_cmg_chars(struct channel_path *chp, u8 cmcv, struct cmg_chars *chars) |