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[S390] Add ioctl support for EMC Symmetrix Subsystem Control I/O

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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>
This commit is contained in:
Nigel Hislop
2008-10-10 21:33:25 +02:00
committed by Martin Schwidefsky
parent 3ce66093f5
commit ab1d848fd6
2 changed files with 114 additions and 0 deletions
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13
arch/s390/include/asm/dasd.h
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@@ -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 */