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authorNigel Hislop <hislop_nigel@emc.com>2008-10-10 21:33:25 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2008-10-10 21:34:00 +0200
commitab1d848fd6a9151b02c6cbf4bddce6e24707b094 (patch)
tree6476c68b552e2df56a0ebd293d0c9777c735480b /arch/s390/include
parent3ce66093f5ec5a6ae0ca90c79d81eee15e842293 (diff)
[S390] Add ioctl support for EMC Symmetrix Subsystem Control I/O
EMC Symmetrix Subsystem Control I/O through CKD dasd requires a specific parameter list sent to the array via a Perform Subsystem Function CCW. The Symmetrix response is retrieved from the array via a Read Subsystem Data CCW. Signed-off-by: Nigel Hislop <hislop_nigel@emc.com> Signed-off-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/include')
-rw-r--r--arch/s390/include/asm/dasd.h13
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/s390/include/asm/dasd.h b/arch/s390/include/asm/dasd.h
index 3f002e13d02..55b2b80cdf6 100644
--- a/arch/s390/include/asm/dasd.h
+++ b/arch/s390/include/asm/dasd.h
@@ -3,6 +3,8 @@
* Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
* Bugreports.to..: <Linux390@de.ibm.com>
* (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 1999,2000
+ * EMC Symmetrix ioctl Copyright EMC Corporation, 2008
+ * Author.........: Nigel Hislop <hislop_nigel@emc.com>
*
* This file is the interface of the DASD device driver, which is exported to user space
* any future changes wrt the API will result in a change of the APIVERSION reported
@@ -202,6 +204,16 @@ typedef struct attrib_data_t {
#define DASD_SEQ_PRESTAGE 0x4
#define DASD_REC_ACCESS 0x5
+/*
+ * Perform EMC Symmetrix I/O
+ */
+typedef struct dasd_symmio_parms {
+ unsigned char reserved[8]; /* compat with older releases */
+ unsigned long long psf_data; /* char * cast to u64 */
+ unsigned long long rssd_result; /* char * cast to u64 */
+ int psf_data_len;
+ int rssd_result_len;
+} __attribute__ ((packed)) dasd_symmio_parms_t;
/********************************************************************************
* SECTION: Definition of IOCTLs
@@ -247,6 +259,7 @@ typedef struct attrib_data_t {
/* Set Attributes (cache operations) */
#define BIODASDSATTR _IOW(DASD_IOCTL_LETTER,2,attrib_data_t)
+#define BIODASDSYMMIO _IOWR(DASD_IOCTL_LETTER, 240, dasd_symmio_parms_t)
#endif /* DASD_H */