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| author | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2008-07-14 09:58:56 +0200 |
|---|---|---|
| committer | Heiko Carstens <heiko.carstens@de.ibm.com> | 2008-07-14 10:02:09 +0200 |
| commit | d2fec595511b5718bdb65645b3d5d99800d97943 (patch) | |
| tree | a94c3560fc2ad6aa89d61d646f73f4d7c1dfcc9b /drivers/s390/cio | |
| parent | 761cdf6aacdb76f819050f4938cdab1f4cdcb945 (diff) | |
| download | linux-d2fec595511b5718bdb65645b3d5d99800d97943.tar.bz2 | |
[S390] stp support.
Add support for clock synchronization with the server time protocol.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Diffstat (limited to 'drivers/s390/cio')
| -rw-r--r-- | drivers/s390/cio/chsc.c | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/drivers/s390/cio/chsc.c b/drivers/s390/cio/chsc.c index cb36f7929786..62b0b16fe3d3 100644 --- a/drivers/s390/cio/chsc.c +++ b/drivers/s390/cio/chsc.c @@ -874,3 +874,52 @@ exit: EXPORT_SYMBOL_GPL(css_general_characteristics); EXPORT_SYMBOL_GPL(css_chsc_characteristics); + +int chsc_sstpc(void *page, unsigned int op, u16 ctrl) +{ + struct { + struct chsc_header request; + unsigned int rsvd0; + unsigned int op : 8; + unsigned int rsvd1 : 8; + unsigned int ctrl : 16; + unsigned int rsvd2[5]; + struct chsc_header response; + unsigned int rsvd3[7]; + } __attribute__ ((packed)) *rr; + int rc; + + memset(page, 0, PAGE_SIZE); + rr = page; + rr->request.length = 0x0020; + rr->request.code = 0x0033; + rr->op = op; + rr->ctrl = ctrl; + rc = chsc(rr); + if (rc) + return -EIO; + rc = (rr->response.code == 0x0001) ? 0 : -EIO; + return rc; +} + +int chsc_sstpi(void *page, void *result, size_t size) +{ + struct { + struct chsc_header request; + unsigned int rsvd0[3]; + struct chsc_header response; + char data[size]; + } __attribute__ ((packed)) *rr; + int rc; + + memset(page, 0, PAGE_SIZE); + rr = page; + rr->request.length = 0x0010; + rr->request.code = 0x0038; + rc = chsc(rr); + if (rc) + return -EIO; + memcpy(result, &rr->data, size); + return (rr->response.code == 0x0001) ? 0 : -EIO; +} + |