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authorSebastian Ott <sebott@linux.vnet.ibm.com>2010-10-25 16:10:30 +0200
committerMartin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com>2010-10-25 16:10:18 +0200
commit906c9768c7750ce76b85597174b9c3599a6ca9f6 (patch)
tree8676732f1a6bf8f83575a0d7c69048d76097ddde /drivers/s390/cio/chsc.h
parent34196f82b16749e119db5572271944c4add0a9aa (diff)
downloadvexpress-lsk-906c9768c7750ce76b85597174b9c3599a6ca9f6.tar.gz
[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 <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390/cio/chsc.h')
-rw-r--r--drivers/s390/cio/chsc.h22
1 files changed, 20 insertions, 2 deletions
diff --git a/drivers/s390/cio/chsc.h b/drivers/s390/cio/chsc.h
index 852b61fc56e..6693f5e3176 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);