From 906c9768c7750ce76b85597174b9c3599a6ca9f6 Mon Sep 17 00:00:00 2001 From: Sebastian Ott Date: Mon, 25 Oct 2010 16:10:30 +0200 Subject: [S390] chsc: use the global page to determine the chp desriptor chsc_determine_channel_path_desc is called by a wrapper who allocates a response struct. The response data is then memcpy'ed to this response struct by chsc_determine_channel_path_desc. Change chsc_determine_base_channel_path_desc to use the global chsc_page and deliver it to the function doing the actual chsc call. The channel path desriptor is then directly read from the response data. As a result we get rid of the additional allocation for the response struct. Signed-off-by: Sebastian Ott Signed-off-by: Martin Schwidefsky --- drivers/s390/cio/chsc.h | 22 ++++++++++++++++++++-- 1 file changed, 20 insertions(+), 2 deletions(-) (limited to 'drivers/s390/cio/chsc.h') diff --git a/drivers/s390/cio/chsc.h b/drivers/s390/cio/chsc.h index 852b61fc56ea..6693f5e3176f 100644 --- a/drivers/s390/cio/chsc.h +++ b/drivers/s390/cio/chsc.h @@ -57,6 +57,25 @@ struct chsc_ssd_info { struct chp_id chpid[8]; u16 fla[8]; }; + +struct chsc_scpd { + struct chsc_header request; + u32:2; + u32 m:1; + u32 c:1; + u32 fmt:4; + u32 cssid:8; + u32:4; + u32 rfmt:4; + u32 first_chpid:8; + u32:24; + u32 last_chpid:8; + u32 zeroes1; + struct chsc_header response; + u8 data[PAGE_SIZE - 20]; +} __attribute__ ((packed)); + + extern int chsc_get_ssd_info(struct subchannel_id schid, struct chsc_ssd_info *ssd); extern int chsc_determine_css_characteristics(void); @@ -70,8 +89,7 @@ int __chsc_do_secm(struct channel_subsystem *css, int enable); int chsc_chp_vary(struct chp_id chpid, int on); int chsc_determine_channel_path_desc(struct chp_id chpid, int fmt, int rfmt, - int c, int m, - struct chsc_response_struct *resp); + int c, int m, void *page); int chsc_determine_base_channel_path_desc(struct chp_id chpid, struct channel_path_desc *desc); void chsc_chp_online(struct chp_id chpid); -- cgit v1.2.3