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/*
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* File . . . . . . . . . . . : linux / drivers / s390 / block / dasd_3990_erp . c
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* Author ( s ) . . . . . . : Horst Hummel < Horst . Hummel @ de . ibm . com >
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* Holger Smolinski < Holger . Smolinski @ de . ibm . com >
* Bugreports . to . . : < Linux390 @ de . ibm . com >
* ( C ) IBM Corporation , IBM Deutschland Entwicklung GmbH , 2000 , 2001
*
*/
# include <linux/timer.h>
# include <linux/slab.h>
# include <asm/idals.h>
# include <asm/todclk.h>
# define PRINTK_HEADER "dasd_erp(3990): "
# include "dasd_int.h"
# include "dasd_eckd.h"
struct DCTL_data {
unsigned char subcommand ; /* e.g Inhibit Write, Enable Write,... */
unsigned char modifier ; /* Subcommand modifier */
unsigned short res ; /* reserved */
} __attribute__ ( ( packed ) ) ;
/*
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* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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* SECTION ERP EXAMINATION
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* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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*/
/*
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* DASD_3990_ERP_EXAMINE_24
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*
* DESCRIPTION
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* Checks only for fatal ( unrecoverable ) error .
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* A detailed examination of the sense data is done later outside
* the interrupt handler .
*
* Each bit configuration leading to an action code 2 ( Exit with
* programming error or unusual condition indication )
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* are handled as fatal errors .
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*
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* All other configurations are handled as recoverable errors .
*
* RETURN VALUES
* dasd_era_fatal for all fatal ( unrecoverable errors )
* dasd_era_recover for all others .
*/
static dasd_era_t
dasd_3990_erp_examine_24 ( struct dasd_ccw_req * cqr , char * sense )
{
struct dasd_device * device = cqr - > device ;
/* check for 'Command Reject' */
if ( ( sense [ 0 ] & SNS0_CMD_REJECT ) & &
( ! ( sense [ 2 ] & SNS2_ENV_DATA_PRESENT ) ) ) {
DEV_MESSAGE ( KERN_ERR , device , " %s " ,
" EXAMINE 24: Command Reject detected - "
" fatal error " ) ;
return dasd_era_fatal ;
}
/* check for 'Invalid Track Format' */
if ( ( sense [ 1 ] & SNS1_INV_TRACK_FORMAT ) & &
( ! ( sense [ 2 ] & SNS2_ENV_DATA_PRESENT ) ) ) {
DEV_MESSAGE ( KERN_ERR , device , " %s " ,
" EXAMINE 24: Invalid Track Format detected "
" - fatal error " ) ;
return dasd_era_fatal ;
}
/* check for 'No Record Found' */
if ( sense [ 1 ] & SNS1_NO_REC_FOUND ) {
/* FIXME: fatal error ?!? */
DEV_MESSAGE ( KERN_ERR , device ,
" EXAMINE 24: No Record Found detected %s " ,
device - > state < = DASD_STATE_BASIC ?
" " : " - fatal error " ) ;
return dasd_era_fatal ;
}
/* return recoverable for all others */
return dasd_era_recover ;
} /* END dasd_3990_erp_examine_24 */
/*
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* DASD_3990_ERP_EXAMINE_32
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*
* DESCRIPTION
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* Checks only for fatal / no / recoverable error .
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* A detailed examination of the sense data is done later outside
* the interrupt handler .
*
* RETURN VALUES
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* dasd_era_none no error
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* dasd_era_fatal for all fatal ( unrecoverable errors )
* dasd_era_recover for recoverable others .
*/
static dasd_era_t
dasd_3990_erp_examine_32 ( struct dasd_ccw_req * cqr , char * sense )
{
struct dasd_device * device = cqr - > device ;
switch ( sense [ 25 ] ) {
case 0x00 :
return dasd_era_none ;
case 0x01 :
DEV_MESSAGE ( KERN_ERR , device , " %s " , " EXAMINE 32: fatal error " ) ;
return dasd_era_fatal ;
default :
return dasd_era_recover ;
}
} /* end dasd_3990_erp_examine_32 */
/*
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* DASD_3990_ERP_EXAMINE
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*
* DESCRIPTION
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* Checks only for fatal / no / recover error .
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* A detailed examination of the sense data is done later outside
* the interrupt handler .
*
* The logic is based on the ' IBM 3990 Storage Control Reference ' manual
* ' Chapter 7. Error Recovery Procedures ' .
*
* RETURN VALUES
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* dasd_era_none no error
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* dasd_era_fatal for all fatal ( unrecoverable errors )
* dasd_era_recover for all others .
*/
dasd_era_t
dasd_3990_erp_examine ( struct dasd_ccw_req * cqr , struct irb * irb )
{
char * sense = irb - > ecw ;
dasd_era_t era = dasd_era_recover ;
struct dasd_device * device = cqr - > device ;
/* check for successful execution first */
if ( irb - > scsw . cstat = = 0x00 & &
irb - > scsw . dstat = = ( DEV_STAT_CHN_END | DEV_STAT_DEV_END ) )
return dasd_era_none ;
/* distinguish between 24 and 32 byte sense data */
if ( sense [ 27 ] & DASD_SENSE_BIT_0 ) {
era = dasd_3990_erp_examine_24 ( cqr , sense ) ;
} else {
era = dasd_3990_erp_examine_32 ( cqr , sense ) ;
}
/* log the erp chain if fatal error occurred */
if ( ( era = = dasd_era_fatal ) & & ( device - > state > = DASD_STATE_READY ) ) {
dasd_log_sense ( cqr , irb ) ;
}
return era ;
} /* END dasd_3990_erp_examine */
/*
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* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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* SECTION ERP HANDLING
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* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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*/
/*
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* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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* 24 and 32 byte sense ERP functions
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* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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*/
/*
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* DASD_3990_ERP_CLEANUP
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*
* DESCRIPTION
* Removes the already build but not necessary ERP request and sets
* the status of the original cqr / erp to the given ( final ) status
*
* PARAMETER
* erp request to be blocked
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* final_status either DASD_CQR_DONE or DASD_CQR_FAILED
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*
* RETURN VALUES
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* cqr original cqr
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*/
static struct dasd_ccw_req *
dasd_3990_erp_cleanup ( struct dasd_ccw_req * erp , char final_status )
{
struct dasd_ccw_req * cqr = erp - > refers ;
dasd_free_erp_request ( erp , erp - > device ) ;
cqr - > status = final_status ;
return cqr ;
} /* end dasd_3990_erp_cleanup */
/*
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* DASD_3990_ERP_BLOCK_QUEUE
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*
* DESCRIPTION
* Block the given device request queue to prevent from further
* processing until the started timer has expired or an related
* interrupt was received .
*/
static void
dasd_3990_erp_block_queue ( struct dasd_ccw_req * erp , int expires )
{
struct dasd_device * device = erp - > device ;
DEV_MESSAGE ( KERN_INFO , device ,
" blocking request queue for %is " , expires / HZ ) ;
device - > stopped | = DASD_STOPPED_PENDING ;
erp - > status = DASD_CQR_QUEUED ;
dasd_set_timer ( device , expires ) ;
}
/*
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* DASD_3990_ERP_INT_REQ
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*
* DESCRIPTION
* Handles ' Intervention Required ' error .
* This means either device offline or not installed .
*
* PARAMETER
* erp current erp
* RETURN VALUES
* erp modified erp
*/
static struct dasd_ccw_req *
dasd_3990_erp_int_req ( struct dasd_ccw_req * erp )
{
struct dasd_device * device = erp - > device ;
/* first time set initial retry counter and erp_function */
/* and retry once without blocking queue */
/* (this enables easier enqueing of the cqr) */
if ( erp - > function ! = dasd_3990_erp_int_req ) {
erp - > retries = 256 ;
erp - > function = dasd_3990_erp_int_req ;
} else {
/* issue a message and wait for 'device ready' interrupt */
DEV_MESSAGE ( KERN_ERR , device , " %s " ,
" is offline or not installed - "
" INTERVENTION REQUIRED!! " ) ;
dasd_3990_erp_block_queue ( erp , 60 * HZ ) ;
}
return erp ;
} /* end dasd_3990_erp_int_req */
/*
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* DASD_3990_ERP_ALTERNATE_PATH
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*
* DESCRIPTION
* Repeat the operation on a different channel path .
* If all alternate paths have been tried , the request is posted with a
* permanent error .
*
* PARAMETER
* erp pointer to the current ERP
*
* RETURN VALUES
* erp modified pointer to the ERP
*/
static void
dasd_3990_erp_alternate_path ( struct dasd_ccw_req * erp )
{
struct dasd_device * device = erp - > device ;
__u8 opm ;
/* try alternate valid path */
opm = ccw_device_get_path_mask ( device - > cdev ) ;
//FIXME: start with get_opm ?
if ( erp - > lpm = = 0 )
erp - > lpm = LPM_ANYPATH & ~ ( erp - > irb . esw . esw0 . sublog . lpum ) ;
else
erp - > lpm & = ~ ( erp - > irb . esw . esw0 . sublog . lpum ) ;
if ( ( erp - > lpm & opm ) ! = 0x00 ) {
DEV_MESSAGE ( KERN_DEBUG , device ,
" try alternate lpm=%x (lpum=%x / opm=%x) " ,
erp - > lpm , erp - > irb . esw . esw0 . sublog . lpum , opm ) ;
/* reset status to queued to handle the request again... */
if ( erp - > status > DASD_CQR_QUEUED )
erp - > status = DASD_CQR_QUEUED ;
erp - > retries = 1 ;
} else {
DEV_MESSAGE ( KERN_ERR , device ,
" No alternate channel path left (lpum=%x / "
" opm=%x) -> permanent error " ,
erp - > irb . esw . esw0 . sublog . lpum , opm ) ;
/* post request with permanent error */
if ( erp - > status > DASD_CQR_QUEUED )
erp - > status = DASD_CQR_FAILED ;
}
} /* end dasd_3990_erp_alternate_path */
/*
* DASD_3990_ERP_DCTL
*
* DESCRIPTION
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* Setup cqr to do the Diagnostic Control ( DCTL ) command with an
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* Inhibit Write subcommand ( 0x20 ) and the given modifier .
*
* PARAMETER
* erp pointer to the current ( failed ) ERP
* modifier subcommand modifier
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*
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* RETURN VALUES
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* dctl_cqr pointer to NEW dctl_cqr
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*
*/
static struct dasd_ccw_req *
dasd_3990_erp_DCTL ( struct dasd_ccw_req * erp , char modifier )
{
struct dasd_device * device = erp - > device ;
struct DCTL_data * DCTL_data ;
struct ccw1 * ccw ;
struct dasd_ccw_req * dctl_cqr ;
dctl_cqr = dasd_alloc_erp_request ( ( char * ) & erp - > magic , 1 ,
sizeof ( struct DCTL_data ) ,
erp - > device ) ;
if ( IS_ERR ( dctl_cqr ) ) {
DEV_MESSAGE ( KERN_ERR , device , " %s " ,
" Unable to allocate DCTL-CQR " ) ;
erp - > status = DASD_CQR_FAILED ;
return erp ;
}
DCTL_data = dctl_cqr - > data ;
DCTL_data - > subcommand = 0x02 ; /* Inhibit Write */
DCTL_data - > modifier = modifier ;
ccw = dctl_cqr - > cpaddr ;
memset ( ccw , 0 , sizeof ( struct ccw1 ) ) ;
ccw - > cmd_code = CCW_CMD_DCTL ;
ccw - > count = 4 ;
ccw - > cda = ( __u32 ) ( addr_t ) DCTL_data ;
dctl_cqr - > function = dasd_3990_erp_DCTL ;
dctl_cqr - > refers = erp ;
dctl_cqr - > device = erp - > device ;
dctl_cqr - > magic = erp - > magic ;
dctl_cqr - > expires = 5 * 60 * HZ ;
dctl_cqr - > retries = 2 ;
dctl_cqr - > buildclk = get_clock ( ) ;
dctl_cqr - > status = DASD_CQR_FILLED ;
return dctl_cqr ;
} /* end dasd_3990_erp_DCTL */
/*
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* DASD_3990_ERP_ACTION_1
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*
* DESCRIPTION
* Setup ERP to do the ERP action 1 ( see Reference manual ) .
* Repeat the operation on a different channel path .
* If all alternate paths have been tried , the request is posted with a
* permanent error .
* Note : duplex handling is not implemented ( yet ) .
*
* PARAMETER
* erp pointer to the current ERP
*
* RETURN VALUES
* erp pointer to the ERP
*
*/
static struct dasd_ccw_req *
dasd_3990_erp_action_1 ( struct dasd_ccw_req * erp )
{
erp - > function = dasd_3990_erp_action_1 ;
dasd_3990_erp_alternate_path ( erp ) ;
return erp ;
} /* end dasd_3990_erp_action_1 */
/*
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* DASD_3990_ERP_ACTION_4
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*
* DESCRIPTION
* Setup ERP to do the ERP action 4 ( see Reference manual ) .
* Set the current request to PENDING to block the CQR queue for that device
* until the state change interrupt appears .
* Use a timer ( 20 seconds ) to retry the cqr if the interrupt is still
* missing .
*
* PARAMETER
* sense sense data of the actual error
* erp pointer to the current ERP
*
* RETURN VALUES
* erp pointer to the ERP
*
*/
static struct dasd_ccw_req *
dasd_3990_erp_action_4 ( struct dasd_ccw_req * erp , char * sense )
{
struct dasd_device * device = erp - > device ;
/* first time set initial retry counter and erp_function */
/* and retry once without waiting for state change pending */
/* interrupt (this enables easier enqueing of the cqr) */
if ( erp - > function ! = dasd_3990_erp_action_4 ) {
DEV_MESSAGE ( KERN_INFO , device , " %s " ,
" dasd_3990_erp_action_4: first time retry " ) ;
erp - > retries = 256 ;
erp - > function = dasd_3990_erp_action_4 ;
} else {
if ( sense [ 25 ] = = 0x1D ) { /* state change pending */
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DEV_MESSAGE ( KERN_INFO , device ,
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" waiting for state change pending "
" interrupt, %d retries left " ,
erp - > retries ) ;
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dasd_3990_erp_block_queue ( erp , 30 * HZ ) ;
} else if ( sense [ 25 ] = = 0x1E ) { /* busy */
DEV_MESSAGE ( KERN_INFO , device ,
" busy - redriving request later, "
" %d retries left " ,
erp - > retries ) ;
dasd_3990_erp_block_queue ( erp , HZ ) ;
} else {
/* no state change pending - retry */
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DEV_MESSAGE ( KERN_INFO , device ,
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" redriving request immediately, "
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" %d retries left " ,
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erp - > retries ) ;
erp - > status = DASD_CQR_QUEUED ;
}
}
return erp ;
} /* end dasd_3990_erp_action_4 */
/*
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* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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* 24 byte sense ERP functions ( only )
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* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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*/
/*
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* DASD_3990_ERP_ACTION_5
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*
* DESCRIPTION
* Setup ERP to do the ERP action 5 ( see Reference manual ) .
* NOTE : Further handling is done in xxx_further_erp after the retries .
*
* PARAMETER
* erp pointer to the current ERP
*
* RETURN VALUES
* erp pointer to the ERP
*
*/
static struct dasd_ccw_req *
dasd_3990_erp_action_5 ( struct dasd_ccw_req * erp )
{
/* first of all retry */
erp - > retries = 10 ;
erp - > function = dasd_3990_erp_action_5 ;
return erp ;
} /* end dasd_3990_erp_action_5 */
/*
* DASD_3990_HANDLE_ENV_DATA
*
* DESCRIPTION
* Handles 24 byte ' Environmental data present ' .
* Does a analysis of the sense data ( message Format )
* and prints the error messages .
*
* PARAMETER
* sense current sense data
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*
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* RETURN VALUES
* void
*/
static void
dasd_3990_handle_env_data ( struct dasd_ccw_req * erp , char * sense )
{
struct dasd_device * device = erp - > device ;
char msg_format = ( sense [ 7 ] & 0xF0 ) ;
char msg_no = ( sense [ 7 ] & 0x0F ) ;
switch ( msg_format ) {
case 0x00 : /* Format 0 - Program or System Checks */
if ( sense [ 1 ] & 0x10 ) { /* check message to operator bit */
switch ( msg_no ) {
case 0x00 : /* No Message */
break ;
case 0x01 :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 0 - Invalid Command " ) ;
break ;
case 0x02 :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 0 - Invalid Command "
" Sequence " ) ;
break ;
case 0x03 :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 0 - CCW Count less than "
" required " ) ;
break ;
case 0x04 :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 0 - Invalid Parameter " ) ;
break ;
case 0x05 :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 0 - Diagnostic of Sepecial "
" Command Violates File Mask " ) ;
break ;
case 0x07 :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 0 - Channel Returned with "
" Incorrect retry CCW " ) ;
break ;
case 0x08 :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 0 - Reset Notification " ) ;
break ;
case 0x09 :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 0 - Storage Path Restart " ) ;
break ;
case 0x0A :
DEV_MESSAGE ( KERN_WARNING , device ,
" FORMAT 0 - Channel requested "
" ... %02x " , sense [ 8 ] ) ;
break ;
case 0x0B :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 0 - Invalid Defective/ "
" Alternate Track Pointer " ) ;
break ;
case 0x0C :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 0 - DPS Installation "
" Check " ) ;
break ;
case 0x0E :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 0 - Command Invalid on "
" Secondary Address " ) ;
break ;
case 0x0F :
DEV_MESSAGE ( KERN_WARNING , device ,
" FORMAT 0 - Status Not As "
" Required: reason %02x " , sense [ 8 ] ) ;
break ;
default :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 0 - Reseved " ) ;
}
} else {
switch ( msg_no ) {
case 0x00 : /* No Message */
break ;
case 0x01 :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 0 - Device Error Source " ) ;
break ;
case 0x02 :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 0 - Reserved " ) ;
break ;
case 0x03 :
DEV_MESSAGE ( KERN_WARNING , device ,
" FORMAT 0 - Device Fenced - "
" device = %02x " , sense [ 4 ] ) ;
break ;
case 0x04 :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 0 - Data Pinned for "
" Device " ) ;
break ;
default :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 0 - Reserved " ) ;
}
}
break ;
case 0x10 : /* Format 1 - Device Equipment Checks */
switch ( msg_no ) {
case 0x00 : /* No Message */
break ;
case 0x01 :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 1 - Device Status 1 not as "
" expected " ) ;
break ;
case 0x03 :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 1 - Index missing " ) ;
break ;
case 0x04 :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 1 - Interruption cannot be reset " ) ;
break ;
case 0x05 :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 1 - Device did not respond to "
" selection " ) ;
break ;
case 0x06 :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 1 - Device check-2 error or Set "
" Sector is not complete " ) ;
break ;
case 0x07 :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 1 - Head address does not "
" compare " ) ;
break ;
case 0x08 :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 1 - Device status 1 not valid " ) ;
break ;
case 0x09 :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 1 - Device not ready " ) ;
break ;
case 0x0A :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 1 - Track physical address did "
" not compare " ) ;
break ;
case 0x0B :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 1 - Missing device address bit " ) ;
break ;
case 0x0C :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 1 - Drive motor switch is off " ) ;
break ;
case 0x0D :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 1 - Seek incomplete " ) ;
break ;
case 0x0E :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 1 - Cylinder address did not "
" compare " ) ;
break ;
case 0x0F :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 1 - Offset active cannot be "
" reset " ) ;
break ;
default :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 1 - Reserved " ) ;
}
break ;
case 0x20 : /* Format 2 - 3990 Equipment Checks */
switch ( msg_no ) {
case 0x08 :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 2 - 3990 check-2 error " ) ;
break ;
case 0x0E :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 2 - Support facility errors " ) ;
break ;
case 0x0F :
DEV_MESSAGE ( KERN_WARNING , device ,
" FORMAT 2 - Microcode detected error %02x " ,
sense [ 8 ] ) ;
break ;
default :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 2 - Reserved " ) ;
}
break ;
case 0x30 : /* Format 3 - 3990 Control Checks */
switch ( msg_no ) {
case 0x0F :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 3 - Allegiance terminated " ) ;
break ;
default :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 3 - Reserved " ) ;
}
break ;
case 0x40 : /* Format 4 - Data Checks */
switch ( msg_no ) {
case 0x00 :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 4 - Home address area error " ) ;
break ;
case 0x01 :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 4 - Count area error " ) ;
break ;
case 0x02 :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 4 - Key area error " ) ;
break ;
case 0x03 :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 4 - Data area error " ) ;
break ;
case 0x04 :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 4 - No sync byte in home address "
" area " ) ;
break ;
case 0x05 :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 4 - No sync byte in count address "
" area " ) ;
break ;
case 0x06 :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 4 - No sync byte in key area " ) ;
break ;
case 0x07 :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 4 - No sync byte in data area " ) ;
break ;
case 0x08 :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 4 - Home address area error; "
" offset active " ) ;
break ;
case 0x09 :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 4 - Count area error; offset "
" active " ) ;
break ;
case 0x0A :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 4 - Key area error; offset "
" active " ) ;
break ;
case 0x0B :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 4 - Data area error; "
" offset active " ) ;
break ;
case 0x0C :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 4 - No sync byte in home "
" address area; offset active " ) ;
break ;
case 0x0D :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 4 - No syn byte in count "
" address area; offset active " ) ;
break ;
case 0x0E :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 4 - No sync byte in key area; "
" offset active " ) ;
break ;
case 0x0F :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 4 - No syn byte in data area; "
" offset active " ) ;
break ;
default :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 4 - Reserved " ) ;
}
break ;
case 0x50 : /* Format 5 - Data Check with displacement information */
switch ( msg_no ) {
case 0x00 :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 5 - Data Check in the "
" home address area " ) ;
break ;
case 0x01 :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 5 - Data Check in the count area " ) ;
break ;
case 0x02 :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 5 - Data Check in the key area " ) ;
break ;
case 0x03 :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 5 - Data Check in the data area " ) ;
break ;
case 0x08 :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 5 - Data Check in the "
" home address area; offset active " ) ;
break ;
case 0x09 :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 5 - Data Check in the count area; "
" offset active " ) ;
break ;
case 0x0A :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 5 - Data Check in the key area; "
" offset active " ) ;
break ;
case 0x0B :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 5 - Data Check in the data area; "
" offset active " ) ;
break ;
default :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 5 - Reserved " ) ;
}
break ;
case 0x60 : /* Format 6 - Usage Statistics/Overrun Errors */
switch ( msg_no ) {
case 0x00 :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 6 - Overrun on channel A " ) ;
break ;
case 0x01 :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 6 - Overrun on channel B " ) ;
break ;
case 0x02 :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 6 - Overrun on channel C " ) ;
break ;
case 0x03 :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 6 - Overrun on channel D " ) ;
break ;
case 0x04 :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 6 - Overrun on channel E " ) ;
break ;
case 0x05 :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 6 - Overrun on channel F " ) ;
break ;
case 0x06 :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 6 - Overrun on channel G " ) ;
break ;
case 0x07 :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 6 - Overrun on channel H " ) ;
break ;
default :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 6 - Reserved " ) ;
}
break ;
case 0x70 : /* Format 7 - Device Connection Control Checks */
switch ( msg_no ) {
case 0x00 :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 7 - RCC initiated by a connection "
" check alert " ) ;
break ;
case 0x01 :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 7 - RCC 1 sequence not "
" successful " ) ;
break ;
case 0x02 :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 7 - RCC 1 and RCC 2 sequences not "
" successful " ) ;
break ;
case 0x03 :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 7 - Invalid tag-in during "
" selection sequence " ) ;
break ;
case 0x04 :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 7 - extra RCC required " ) ;
break ;
case 0x05 :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 7 - Invalid DCC selection "
" response or timeout " ) ;
break ;
case 0x06 :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 7 - Missing end operation; device "
" transfer complete " ) ;
break ;
case 0x07 :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 7 - Missing end operation; device "
" transfer incomplete " ) ;
break ;
case 0x08 :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 7 - Invalid tag-in for an "
" immediate command sequence " ) ;
break ;
case 0x09 :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 7 - Invalid tag-in for an "
" extended command sequence " ) ;
break ;
case 0x0A :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 7 - 3990 microcode time out when "
" stopping selection " ) ;
break ;
case 0x0B :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 7 - No response to selection "
" after a poll interruption " ) ;
break ;
case 0x0C :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 7 - Permanent path error (DASD "
" controller not available) " ) ;
break ;
case 0x0D :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 7 - DASD controller not available "
" on disconnected command chain " ) ;
break ;
default :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 7 - Reserved " ) ;
}
break ;
case 0x80 : /* Format 8 - Additional Device Equipment Checks */
switch ( msg_no ) {
case 0x00 : /* No Message */
case 0x01 :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 8 - Error correction code "
" hardware fault " ) ;
break ;
case 0x03 :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 8 - Unexpected end operation "
" response code " ) ;
break ;
case 0x04 :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 8 - End operation with transfer "
" count not zero " ) ;
break ;
case 0x05 :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 8 - End operation with transfer "
" count zero " ) ;
break ;
case 0x06 :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 8 - DPS checks after a system "
" reset or selective reset " ) ;
break ;
case 0x07 :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 8 - DPS cannot be filled " ) ;
break ;
case 0x08 :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 8 - Short busy time-out during "
" device selection " ) ;
break ;
case 0x09 :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 8 - DASD controller failed to "
" set or reset the long busy latch " ) ;
break ;
case 0x0A :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 8 - No interruption from device "
" during a command chain " ) ;
break ;
default :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 8 - Reserved " ) ;
}
break ;
case 0x90 : /* Format 9 - Device Read, Write, and Seek Checks */
switch ( msg_no ) {
case 0x00 :
break ; /* No Message */
case 0x06 :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 9 - Device check-2 error " ) ;
break ;
case 0x07 :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 9 - Head address did not compare " ) ;
break ;
case 0x0A :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 9 - Track physical address did "
" not compare while oriented " ) ;
break ;
case 0x0E :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 9 - Cylinder address did not "
" compare " ) ;
break ;
default :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT 9 - Reserved " ) ;
}
break ;
case 0xF0 : /* Format F - Cache Storage Checks */
switch ( msg_no ) {
case 0x00 :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT F - Operation Terminated " ) ;
break ;
case 0x01 :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT F - Subsystem Processing Error " ) ;
break ;
case 0x02 :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT F - Cache or nonvolatile storage "
" equipment failure " ) ;
break ;
case 0x04 :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT F - Caching terminated " ) ;
break ;
case 0x06 :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT F - Cache fast write access not "
" authorized " ) ;
break ;
case 0x07 :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT F - Track format incorrect " ) ;
break ;
case 0x09 :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT F - Caching reinitiated " ) ;
break ;
case 0x0A :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT F - Nonvolatile storage "
" terminated " ) ;
break ;
case 0x0B :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT F - Volume is suspended duplex " ) ;
2006-03-24 03:15:25 -08:00
/* call extended error reporting (EER) */
dasd_eer_write ( device , erp - > refers ,
DASD_EER_PPRCSUSPEND ) ;
2005-04-16 15:20:36 -07:00
break ;
case 0x0C :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT F - Subsystem status connot be "
" determined " ) ;
break ;
case 0x0D :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT F - Caching status reset to "
" default " ) ;
break ;
case 0x0E :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT F - DASD Fast Write inhibited " ) ;
break ;
default :
DEV_MESSAGE ( KERN_WARNING , device , " %s " ,
" FORMAT D - Reserved " ) ;
}
break ;
default : /* unknown message format - should not happen */
DEV_MESSAGE ( KERN_WARNING , device ,
" unknown message format %02x " ,
msg_format ) ;
break ;
} /* end switch message format */
} /* end dasd_3990_handle_env_data */
/*
* DASD_3990_ERP_COM_REJ
*
* DESCRIPTION
* Handles 24 byte ' Command Reject ' error .
*
* PARAMETER
* erp current erp_head
* sense current sense data
2006-06-29 14:58:12 +02:00
*
2005-04-16 15:20:36 -07:00
* RETURN VALUES
2006-06-29 14:58:12 +02:00
* erp ' new ' erp_head - pointer to new ERP
2005-04-16 15:20:36 -07:00
*/
static struct dasd_ccw_req *
dasd_3990_erp_com_rej ( struct dasd_ccw_req * erp , char * sense )
{
struct dasd_device * device = erp - > device ;
erp - > function = dasd_3990_erp_com_rej ;
/* env data present (ACTION 10 - retry should work) */
if ( sense [ 2 ] & SNS2_ENV_DATA_PRESENT ) {
DEV_MESSAGE ( KERN_DEBUG , device , " %s " ,
" Command Reject - environmental data present " ) ;
dasd_3990_handle_env_data ( erp , sense ) ;
erp - > retries = 5 ;
} else {
/* fatal error - set status to FAILED */
DEV_MESSAGE ( KERN_ERR , device , " %s " ,
" Command Reject - Fatal error " ) ;
erp = dasd_3990_erp_cleanup ( erp , DASD_CQR_FAILED ) ;
}
return erp ;
} /* end dasd_3990_erp_com_rej */
/*
2006-06-29 14:58:12 +02:00
* DASD_3990_ERP_BUS_OUT
2005-04-16 15:20:36 -07:00
*
* DESCRIPTION
* Handles 24 byte ' Bus Out Parity Check ' error .
*
* PARAMETER
* erp current erp_head
* RETURN VALUES
* erp new erp_head - pointer to new ERP
*/
static struct dasd_ccw_req *
dasd_3990_erp_bus_out ( struct dasd_ccw_req * erp )
{
struct dasd_device * device = erp - > device ;
/* first time set initial retry counter and erp_function */
/* and retry once without blocking queue */
/* (this enables easier enqueing of the cqr) */
if ( erp - > function ! = dasd_3990_erp_bus_out ) {
erp - > retries = 256 ;
erp - > function = dasd_3990_erp_bus_out ;
} else {
/* issue a message and wait for 'device ready' interrupt */
DEV_MESSAGE ( KERN_DEBUG , device , " %s " ,
" bus out parity error or BOPC requested by "
" channel " ) ;
dasd_3990_erp_block_queue ( erp , 60 * HZ ) ;
}
return erp ;
} /* end dasd_3990_erp_bus_out */
/*
* DASD_3990_ERP_EQUIP_CHECK
*
* DESCRIPTION
* Handles 24 byte ' Equipment Check ' error .
*
* PARAMETER
* erp current erp_head
* RETURN VALUES
* erp new erp_head - pointer to new ERP
*/
static struct dasd_ccw_req *
dasd_3990_erp_equip_check ( struct dasd_ccw_req * erp , char * sense )
{
struct dasd_device * device = erp - > device ;
erp - > function = dasd_3990_erp_equip_check ;
if ( sense [ 1 ] & SNS1_WRITE_INHIBITED ) {
DEV_MESSAGE ( KERN_DEBUG , device , " %s " ,
" Write inhibited path encountered " ) ;
/* vary path offline */
DEV_MESSAGE ( KERN_ERR , device , " %s " ,
" Path should be varied off-line. "
" This is not implemented yet \n - please report "
" to linux390@de.ibm.com " ) ;
erp = dasd_3990_erp_action_1 ( erp ) ;
} else if ( sense [ 2 ] & SNS2_ENV_DATA_PRESENT ) {
DEV_MESSAGE ( KERN_DEBUG , device , " %s " ,
" Equipment Check - " " environmental data present " ) ;
dasd_3990_handle_env_data ( erp , sense ) ;
erp = dasd_3990_erp_action_4 ( erp , sense ) ;
} else if ( sense [ 1 ] & SNS1_PERM_ERR ) {
DEV_MESSAGE ( KERN_DEBUG , device , " %s " ,
" Equipment Check - retry exhausted or "
" undesirable " ) ;
erp = dasd_3990_erp_action_1 ( erp ) ;
} else {
/* all other equipment checks - Action 5 */
/* rest is done when retries == 0 */
DEV_MESSAGE ( KERN_DEBUG , device , " %s " ,
" Equipment check or processing error " ) ;
erp = dasd_3990_erp_action_5 ( erp ) ;
}
return erp ;
} /* end dasd_3990_erp_equip_check */
/*
* DASD_3990_ERP_DATA_CHECK
*
* DESCRIPTION
* Handles 24 byte ' Data Check ' error .
*
* PARAMETER
* erp current erp_head
* RETURN VALUES
* erp new erp_head - pointer to new ERP
*/
static struct dasd_ccw_req *
dasd_3990_erp_data_check ( struct dasd_ccw_req * erp , char * sense )
{
struct dasd_device * device = erp - > device ;
erp - > function = dasd_3990_erp_data_check ;
if ( sense [ 2 ] & SNS2_CORRECTABLE ) { /* correctable data check */
/* issue message that the data has been corrected */
DEV_MESSAGE ( KERN_EMERG , device , " %s " ,
" Data recovered during retry with PCI "
" fetch mode active " ) ;
/* not possible to handle this situation in Linux */
panic ( " No way to inform application about the possibly "
" incorrect data " ) ;
} else if ( sense [ 2 ] & SNS2_ENV_DATA_PRESENT ) {
DEV_MESSAGE ( KERN_DEBUG , device , " %s " ,
" Uncorrectable data check recovered secondary "
" addr of duplex pair " ) ;
erp = dasd_3990_erp_action_4 ( erp , sense ) ;
} else if ( sense [ 1 ] & SNS1_PERM_ERR ) {
DEV_MESSAGE ( KERN_DEBUG , device , " %s " ,
" Uncorrectable data check with internal "
" retry exhausted " ) ;
erp = dasd_3990_erp_action_1 ( erp ) ;
} else {
/* all other data checks */
DEV_MESSAGE ( KERN_DEBUG , device , " %s " ,
" Uncorrectable data check with retry count "
" exhausted... " ) ;
erp = dasd_3990_erp_action_5 ( erp ) ;
}
return erp ;
} /* end dasd_3990_erp_data_check */
/*
* DASD_3990_ERP_OVERRUN
*
* DESCRIPTION
* Handles 24 byte ' Overrun ' error .
*
* PARAMETER
* erp current erp_head
* RETURN VALUES
* erp new erp_head - pointer to new ERP
*/
static struct dasd_ccw_req *
dasd_3990_erp_overrun ( struct dasd_ccw_req * erp , char * sense )
{
struct dasd_device * device = erp - > device ;
erp - > function = dasd_3990_erp_overrun ;
DEV_MESSAGE ( KERN_DEBUG , device , " %s " ,
" Overrun - service overrun or overrun "
" error requested by channel " ) ;
erp = dasd_3990_erp_action_5 ( erp ) ;
return erp ;
} /* end dasd_3990_erp_overrun */
/*
* DASD_3990_ERP_INV_FORMAT
*
* DESCRIPTION
* Handles 24 byte ' Invalid Track Format ' error .
*
* PARAMETER
* erp current erp_head
* RETURN VALUES
* erp new erp_head - pointer to new ERP
*/
static struct dasd_ccw_req *
dasd_3990_erp_inv_format ( struct dasd_ccw_req * erp , char * sense )
{
struct dasd_device * device = erp - > device ;
erp - > function = dasd_3990_erp_inv_format ;
if ( sense [ 2 ] & SNS2_ENV_DATA_PRESENT ) {
DEV_MESSAGE ( KERN_DEBUG , device , " %s " ,
" Track format error when destaging or "
" staging data " ) ;
dasd_3990_handle_env_data ( erp , sense ) ;
erp = dasd_3990_erp_action_4 ( erp , sense ) ;
} else {
DEV_MESSAGE ( KERN_ERR , device , " %s " ,
" Invalid Track Format - Fatal error should have "
" been handled within the interrupt handler " ) ;
erp = dasd_3990_erp_cleanup ( erp , DASD_CQR_FAILED ) ;
}
return erp ;
} /* end dasd_3990_erp_inv_format */
/*
* DASD_3990_ERP_EOC
*
* DESCRIPTION
* Handles 24 byte ' End - of - Cylinder ' error .
*
* PARAMETER
* erp already added default erp
* RETURN VALUES
* erp pointer to original ( failed ) cqr .
*/
static struct dasd_ccw_req *
dasd_3990_erp_EOC ( struct dasd_ccw_req * default_erp , char * sense )
{
struct dasd_device * device = default_erp - > device ;
DEV_MESSAGE ( KERN_ERR , device , " %s " ,
" End-of-Cylinder - must never happen " ) ;
/* implement action 7 - BUG */
return dasd_3990_erp_cleanup ( default_erp , DASD_CQR_FAILED ) ;
} /* end dasd_3990_erp_EOC */
/*
* DASD_3990_ERP_ENV_DATA
*
* DESCRIPTION
* Handles 24 byte ' Environmental - Data Present ' error .
*
* PARAMETER
* erp current erp_head
* RETURN VALUES
* erp new erp_head - pointer to new ERP
*/
static struct dasd_ccw_req *
dasd_3990_erp_env_data ( struct dasd_ccw_req * erp , char * sense )
{
struct dasd_device * device = erp - > device ;
erp - > function = dasd_3990_erp_env_data ;
DEV_MESSAGE ( KERN_DEBUG , device , " %s " , " Environmental data present " ) ;
dasd_3990_handle_env_data ( erp , sense ) ;
/* don't retry on disabled interface */
if ( sense [ 7 ] ! = 0x0F ) {
erp = dasd_3990_erp_action_4 ( erp , sense ) ;
} else {
erp = dasd_3990_erp_cleanup ( erp , DASD_CQR_IN_IO ) ;
}
return erp ;
} /* end dasd_3990_erp_env_data */
/*
* DASD_3990_ERP_NO_REC
*
* DESCRIPTION
* Handles 24 byte ' No Record Found ' error .
*
* PARAMETER
* erp already added default ERP
2006-06-29 14:58:12 +02:00
*
2005-04-16 15:20:36 -07:00
* RETURN VALUES
* erp new erp_head - pointer to new ERP
*/
static struct dasd_ccw_req *
dasd_3990_erp_no_rec ( struct dasd_ccw_req * default_erp , char * sense )
{
struct dasd_device * device = default_erp - > device ;
DEV_MESSAGE ( KERN_ERR , device , " %s " ,
" No Record Found - Fatal error should "
" have been handled within the interrupt handler " ) ;
return dasd_3990_erp_cleanup ( default_erp , DASD_CQR_FAILED ) ;
} /* end dasd_3990_erp_no_rec */
/*
* DASD_3990_ERP_FILE_PROT
*
* DESCRIPTION
* Handles 24 byte ' File Protected ' error .
* Note : Seek related recovery is not implemented because
* wee don ' t use the seek command yet .
*
* PARAMETER
* erp current erp_head
* RETURN VALUES
* erp new erp_head - pointer to new ERP
*/
static struct dasd_ccw_req *
dasd_3990_erp_file_prot ( struct dasd_ccw_req * erp )
{
struct dasd_device * device = erp - > device ;
DEV_MESSAGE ( KERN_ERR , device , " %s " , " File Protected " ) ;
return dasd_3990_erp_cleanup ( erp , DASD_CQR_FAILED ) ;
} /* end dasd_3990_erp_file_prot */
/*
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* DASD_3990_ERP_INSPECT_24
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*
* DESCRIPTION
* Does a detailed inspection of the 24 byte sense data
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* and sets up a related error recovery action .
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*
* PARAMETER
* sense sense data of the actual error
* erp pointer to the currently created default ERP
*
* RETURN VALUES
* erp pointer to the ( addtitional ) ERP
*/
static struct dasd_ccw_req *
dasd_3990_erp_inspect_24 ( struct dasd_ccw_req * erp , char * sense )
{
struct dasd_ccw_req * erp_filled = NULL ;
/* Check sense for .... */
/* 'Command Reject' */
if ( ( erp_filled = = NULL ) & & ( sense [ 0 ] & SNS0_CMD_REJECT ) ) {
erp_filled = dasd_3990_erp_com_rej ( erp , sense ) ;
}
/* 'Intervention Required' */
if ( ( erp_filled = = NULL ) & & ( sense [ 0 ] & SNS0_INTERVENTION_REQ ) ) {
erp_filled = dasd_3990_erp_int_req ( erp ) ;
}
/* 'Bus Out Parity Check' */
if ( ( erp_filled = = NULL ) & & ( sense [ 0 ] & SNS0_BUS_OUT_CHECK ) ) {
erp_filled = dasd_3990_erp_bus_out ( erp ) ;
}
/* 'Equipment Check' */
if ( ( erp_filled = = NULL ) & & ( sense [ 0 ] & SNS0_EQUIPMENT_CHECK ) ) {
erp_filled = dasd_3990_erp_equip_check ( erp , sense ) ;
}
/* 'Data Check' */
if ( ( erp_filled = = NULL ) & & ( sense [ 0 ] & SNS0_DATA_CHECK ) ) {
erp_filled = dasd_3990_erp_data_check ( erp , sense ) ;
}
/* 'Overrun' */
if ( ( erp_filled = = NULL ) & & ( sense [ 0 ] & SNS0_OVERRUN ) ) {
erp_filled = dasd_3990_erp_overrun ( erp , sense ) ;
}
/* 'Invalid Track Format' */
if ( ( erp_filled = = NULL ) & & ( sense [ 1 ] & SNS1_INV_TRACK_FORMAT ) ) {
erp_filled = dasd_3990_erp_inv_format ( erp , sense ) ;
}
/* 'End-of-Cylinder' */
if ( ( erp_filled = = NULL ) & & ( sense [ 1 ] & SNS1_EOC ) ) {
erp_filled = dasd_3990_erp_EOC ( erp , sense ) ;
}
/* 'Environmental Data' */
if ( ( erp_filled = = NULL ) & & ( sense [ 2 ] & SNS2_ENV_DATA_PRESENT ) ) {
erp_filled = dasd_3990_erp_env_data ( erp , sense ) ;
}
/* 'No Record Found' */
if ( ( erp_filled = = NULL ) & & ( sense [ 1 ] & SNS1_NO_REC_FOUND ) ) {
erp_filled = dasd_3990_erp_no_rec ( erp , sense ) ;
}
/* 'File Protected' */
if ( ( erp_filled = = NULL ) & & ( sense [ 1 ] & SNS1_FILE_PROTECTED ) ) {
erp_filled = dasd_3990_erp_file_prot ( erp ) ;
}
/* other (unknown) error - do default ERP */
if ( erp_filled = = NULL ) {
erp_filled = erp ;
}
return erp_filled ;
} /* END dasd_3990_erp_inspect_24 */
/*
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* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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* 32 byte sense ERP functions ( only )
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* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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*/
/*
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* DASD_3990_ERPACTION_10_32
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*
* DESCRIPTION
* Handles 32 byte ' Action 10 ' of Single Program Action Codes .
* Just retry and if retry doesn ' t work , return with error .
*
* PARAMETER
* erp current erp_head
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* sense current sense data
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* RETURN VALUES
* erp modified erp_head
*/
static struct dasd_ccw_req *
dasd_3990_erp_action_10_32 ( struct dasd_ccw_req * erp , char * sense )
{
struct dasd_device * device = erp - > device ;
erp - > retries = 256 ;
erp - > function = dasd_3990_erp_action_10_32 ;
DEV_MESSAGE ( KERN_DEBUG , device , " %s " , " Perform logging requested " ) ;
return erp ;
} /* end dasd_3990_erp_action_10_32 */
/*
* DASD_3990_ERP_ACTION_1B_32
*
* DESCRIPTION
* Handles 32 byte ' Action 1 B ' of Single Program Action Codes .
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* A write operation could not be finished because of an unexpected
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* condition .
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* The already created ' default erp ' is used to get the link to
* the erp chain , but it can not be used for this recovery
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* action because it contains no DE / LO data space .
*
* PARAMETER
* default_erp already added default erp .
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* sense current sense data
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*
* RETURN VALUES
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* erp new erp or
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* default_erp in case of imprecise ending or error
*/
static struct dasd_ccw_req *
dasd_3990_erp_action_1B_32 ( struct dasd_ccw_req * default_erp , char * sense )
{
struct dasd_device * device = default_erp - > device ;
__u32 cpa = 0 ;
struct dasd_ccw_req * cqr ;
struct dasd_ccw_req * erp ;
struct DE_eckd_data * DE_data ;
char * LO_data ; /* LO_eckd_data_t */
struct ccw1 * ccw ;
DEV_MESSAGE ( KERN_DEBUG , device , " %s " ,
" Write not finished because of unexpected condition " ) ;
default_erp - > function = dasd_3990_erp_action_1B_32 ;
/* determine the original cqr */
cqr = default_erp ;
while ( cqr - > refers ! = NULL ) {
cqr = cqr - > refers ;
}
/* for imprecise ending just do default erp */
if ( sense [ 1 ] & 0x01 ) {
DEV_MESSAGE ( KERN_DEBUG , device , " %s " ,
" Imprecise ending is set - just retry " ) ;
return default_erp ;
}
/* determine the address of the CCW to be restarted */
/* Imprecise ending is not set -> addr from IRB-SCSW */
cpa = default_erp - > refers - > irb . scsw . cpa ;
if ( cpa = = 0 ) {
DEV_MESSAGE ( KERN_DEBUG , device , " %s " ,
" Unable to determine address of the CCW "
" to be restarted " ) ;
return dasd_3990_erp_cleanup ( default_erp , DASD_CQR_FAILED ) ;
}
/* Build new ERP request including DE/LO */
erp = dasd_alloc_erp_request ( ( char * ) & cqr - > magic ,
2 + 1 , /* DE/LO + TIC */
sizeof ( struct DE_eckd_data ) +
sizeof ( struct LO_eckd_data ) , device ) ;
if ( IS_ERR ( erp ) ) {
DEV_MESSAGE ( KERN_ERR , device , " %s " , " Unable to allocate ERP " ) ;
return dasd_3990_erp_cleanup ( default_erp , DASD_CQR_FAILED ) ;
}
/* use original DE */
DE_data = erp - > data ;
memcpy ( DE_data , cqr - > data , sizeof ( struct DE_eckd_data ) ) ;
/* create LO */
LO_data = erp - > data + sizeof ( struct DE_eckd_data ) ;
if ( ( sense [ 3 ] = = 0x01 ) & & ( LO_data [ 1 ] & 0x01 ) ) {
DEV_MESSAGE ( KERN_ERR , device , " %s " ,
" BUG - this should not happen " ) ;
return dasd_3990_erp_cleanup ( default_erp , DASD_CQR_FAILED ) ;
}
if ( ( sense [ 7 ] & 0x3F ) = = 0x01 ) {
/* operation code is WRITE DATA -> data area orientation */
LO_data [ 0 ] = 0x81 ;
} else if ( ( sense [ 7 ] & 0x3F ) = = 0x03 ) {
/* operation code is FORMAT WRITE -> index orientation */
LO_data [ 0 ] = 0xC3 ;
} else {
LO_data [ 0 ] = sense [ 7 ] ; /* operation */
}
LO_data [ 1 ] = sense [ 8 ] ; /* auxiliary */
LO_data [ 2 ] = sense [ 9 ] ;
LO_data [ 3 ] = sense [ 3 ] ; /* count */
LO_data [ 4 ] = sense [ 29 ] ; /* seek_addr.cyl */
LO_data [ 5 ] = sense [ 30 ] ; /* seek_addr.cyl 2nd byte */
LO_data [ 7 ] = sense [ 31 ] ; /* seek_addr.head 2nd byte */
memcpy ( & ( LO_data [ 8 ] ) , & ( sense [ 11 ] ) , 8 ) ;
/* create DE ccw */
ccw = erp - > cpaddr ;
memset ( ccw , 0 , sizeof ( struct ccw1 ) ) ;
ccw - > cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT ;
ccw - > flags = CCW_FLAG_CC ;
ccw - > count = 16 ;
ccw - > cda = ( __u32 ) ( addr_t ) DE_data ;
/* create LO ccw */
ccw + + ;
memset ( ccw , 0 , sizeof ( struct ccw1 ) ) ;
ccw - > cmd_code = DASD_ECKD_CCW_LOCATE_RECORD ;
ccw - > flags = CCW_FLAG_CC ;
ccw - > count = 16 ;
ccw - > cda = ( __u32 ) ( addr_t ) LO_data ;
/* TIC to the failed ccw */
ccw + + ;
ccw - > cmd_code = CCW_CMD_TIC ;
ccw - > cda = cpa ;
/* fill erp related fields */
erp - > function = dasd_3990_erp_action_1B_32 ;
erp - > refers = default_erp - > refers ;
erp - > device = device ;
erp - > magic = default_erp - > magic ;
erp - > expires = 0 ;
erp - > retries = 256 ;
erp - > buildclk = get_clock ( ) ;
erp - > status = DASD_CQR_FILLED ;
/* remove the default erp */
dasd_free_erp_request ( default_erp , device ) ;
return erp ;
} /* end dasd_3990_erp_action_1B_32 */
/*
* DASD_3990_UPDATE_1B
*
* DESCRIPTION
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* Handles the update to the 32 byte ' Action 1 B ' of Single Program
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* Action Codes in case the first action was not successful .
* The already created ' previous_erp ' is the currently not successful
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* ERP .
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*
* PARAMETER
* previous_erp already created previous erp .
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* sense current sense data
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* RETURN VALUES
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* erp modified erp
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*/
static struct dasd_ccw_req *
dasd_3990_update_1B ( struct dasd_ccw_req * previous_erp , char * sense )
{
struct dasd_device * device = previous_erp - > device ;
__u32 cpa = 0 ;
struct dasd_ccw_req * cqr ;
struct dasd_ccw_req * erp ;
char * LO_data ; /* struct LO_eckd_data */
struct ccw1 * ccw ;
DEV_MESSAGE ( KERN_DEBUG , device , " %s " ,
" Write not finished because of unexpected condition "
" - follow on " ) ;
/* determine the original cqr */
cqr = previous_erp ;
while ( cqr - > refers ! = NULL ) {
cqr = cqr - > refers ;
}
/* for imprecise ending just do default erp */
if ( sense [ 1 ] & 0x01 ) {
DEV_MESSAGE ( KERN_DEBUG , device , " %s " ,
" Imprecise ending is set - just retry " ) ;
previous_erp - > status = DASD_CQR_QUEUED ;
return previous_erp ;
}
/* determine the address of the CCW to be restarted */
/* Imprecise ending is not set -> addr from IRB-SCSW */
cpa = previous_erp - > irb . scsw . cpa ;
if ( cpa = = 0 ) {
DEV_MESSAGE ( KERN_DEBUG , device , " %s " ,
" Unable to determine address of the CCW "
" to be restarted " ) ;
previous_erp - > status = DASD_CQR_FAILED ;
return previous_erp ;
}
erp = previous_erp ;
/* update the LO with the new returned sense data */
LO_data = erp - > data + sizeof ( struct DE_eckd_data ) ;
if ( ( sense [ 3 ] = = 0x01 ) & & ( LO_data [ 1 ] & 0x01 ) ) {
DEV_MESSAGE ( KERN_ERR , device , " %s " ,
" BUG - this should not happen " ) ;
previous_erp - > status = DASD_CQR_FAILED ;
return previous_erp ;
}
if ( ( sense [ 7 ] & 0x3F ) = = 0x01 ) {
/* operation code is WRITE DATA -> data area orientation */
LO_data [ 0 ] = 0x81 ;
} else if ( ( sense [ 7 ] & 0x3F ) = = 0x03 ) {
/* operation code is FORMAT WRITE -> index orientation */
LO_data [ 0 ] = 0xC3 ;
} else {
LO_data [ 0 ] = sense [ 7 ] ; /* operation */
}
LO_data [ 1 ] = sense [ 8 ] ; /* auxiliary */
LO_data [ 2 ] = sense [ 9 ] ;
LO_data [ 3 ] = sense [ 3 ] ; /* count */
LO_data [ 4 ] = sense [ 29 ] ; /* seek_addr.cyl */
LO_data [ 5 ] = sense [ 30 ] ; /* seek_addr.cyl 2nd byte */
LO_data [ 7 ] = sense [ 31 ] ; /* seek_addr.head 2nd byte */
memcpy ( & ( LO_data [ 8 ] ) , & ( sense [ 11 ] ) , 8 ) ;
/* TIC to the failed ccw */
ccw = erp - > cpaddr ; /* addr of DE ccw */
ccw + + ; /* addr of LE ccw */
ccw + + ; /* addr of TIC ccw */
ccw - > cda = cpa ;
erp - > status = DASD_CQR_QUEUED ;
return erp ;
} /* end dasd_3990_update_1B */
/*
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* DASD_3990_ERP_COMPOUND_RETRY
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*
* DESCRIPTION
* Handles the compound ERP action retry code .
* NOTE : At least one retry is done even if zero is specified
* by the sense data . This makes enqueueing of the request
* easier .
*
* PARAMETER
* sense sense data of the actual error
* erp pointer to the currently created ERP
*
* RETURN VALUES
* erp modified ERP pointer
*
*/
static void
dasd_3990_erp_compound_retry ( struct dasd_ccw_req * erp , char * sense )
{
switch ( sense [ 25 ] & 0x03 ) {
case 0x00 : /* no not retry */
erp - > retries = 1 ;
break ;
case 0x01 : /* retry 2 times */
erp - > retries = 2 ;
break ;
case 0x02 : /* retry 10 times */
erp - > retries = 10 ;
break ;
case 0x03 : /* retry 256 times */
erp - > retries = 256 ;
break ;
default :
BUG ( ) ;
}
erp - > function = dasd_3990_erp_compound_retry ;
} /* end dasd_3990_erp_compound_retry */
/*
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* DASD_3990_ERP_COMPOUND_PATH
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*
* DESCRIPTION
* Handles the compound ERP action for retry on alternate
* channel path .
*
* PARAMETER
* sense sense data of the actual error
* erp pointer to the currently created ERP
*
* RETURN VALUES
* erp modified ERP pointer
*
*/
static void
dasd_3990_erp_compound_path ( struct dasd_ccw_req * erp , char * sense )
{
if ( sense [ 25 ] & DASD_SENSE_BIT_3 ) {
dasd_3990_erp_alternate_path ( erp ) ;
if ( erp - > status = = DASD_CQR_FAILED ) {
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/* reset the lpm and the status to be able to
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* try further actions . */
erp - > lpm = 0 ;
erp - > status = DASD_CQR_ERROR ;
}
}
erp - > function = dasd_3990_erp_compound_path ;
} /* end dasd_3990_erp_compound_path */
/*
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* DASD_3990_ERP_COMPOUND_CODE
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*
* DESCRIPTION
* Handles the compound ERP action for retry code .
*
* PARAMETER
* sense sense data of the actual error
* erp pointer to the currently created ERP
*
* RETURN VALUES
* erp NEW ERP pointer
*
*/
static struct dasd_ccw_req *
dasd_3990_erp_compound_code ( struct dasd_ccw_req * erp , char * sense )
{
if ( sense [ 25 ] & DASD_SENSE_BIT_2 ) {
switch ( sense [ 28 ] ) {
case 0x17 :
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/* issue a Diagnostic Control command with an
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* Inhibit Write subcommand and controller modifier */
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erp = dasd_3990_erp_DCTL ( erp , 0x20 ) ;
break ;
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case 0x25 :
/* wait for 5 seconds and retry again */
erp - > retries = 1 ;
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dasd_3990_erp_block_queue ( erp , 5 * HZ ) ;
break ;
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default :
/* should not happen - continue */
break ;
}
}
erp - > function = dasd_3990_erp_compound_code ;
return erp ;
} /* end dasd_3990_erp_compound_code */
/*
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* DASD_3990_ERP_COMPOUND_CONFIG
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*
* DESCRIPTION
* Handles the compound ERP action for configruation
* dependent error .
* Note : duplex handling is not implemented ( yet ) .
*
* PARAMETER
* sense sense data of the actual error
* erp pointer to the currently created ERP
*
* RETURN VALUES
* erp modified ERP pointer
*
*/
static void
dasd_3990_erp_compound_config ( struct dasd_ccw_req * erp , char * sense )
{
if ( ( sense [ 25 ] & DASD_SENSE_BIT_1 ) & & ( sense [ 26 ] & DASD_SENSE_BIT_2 ) ) {
/* set to suspended duplex state then restart */
struct dasd_device * device = erp - > device ;
DEV_MESSAGE ( KERN_ERR , device , " %s " ,
" Set device to suspended duplex state should be "
" done! \n "
" This is not implemented yet (for compound ERP) "
" - please report to linux390@de.ibm.com " ) ;
}
erp - > function = dasd_3990_erp_compound_config ;
} /* end dasd_3990_erp_compound_config */
/*
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* DASD_3990_ERP_COMPOUND
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*
* DESCRIPTION
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* Does the further compound program action if
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* compound retry was not successful .
*
* PARAMETER
* sense sense data of the actual error
* erp pointer to the current ( failed ) ERP
*
* RETURN VALUES
* erp ( additional ) ERP pointer
*
*/
static struct dasd_ccw_req *
dasd_3990_erp_compound ( struct dasd_ccw_req * erp , char * sense )
{
if ( ( erp - > function = = dasd_3990_erp_compound_retry ) & &
( erp - > status = = DASD_CQR_ERROR ) ) {
dasd_3990_erp_compound_path ( erp , sense ) ;
}
if ( ( erp - > function = = dasd_3990_erp_compound_path ) & &
( erp - > status = = DASD_CQR_ERROR ) ) {
erp = dasd_3990_erp_compound_code ( erp , sense ) ;
}
if ( ( erp - > function = = dasd_3990_erp_compound_code ) & &
( erp - > status = = DASD_CQR_ERROR ) ) {
dasd_3990_erp_compound_config ( erp , sense ) ;
}
/* if no compound action ERP specified, the request failed */
if ( erp - > status = = DASD_CQR_ERROR ) {
erp - > status = DASD_CQR_FAILED ;
}
return erp ;
} /* end dasd_3990_erp_compound */
/*
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* DASD_3990_ERP_INSPECT_32
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*
* DESCRIPTION
* Does a detailed inspection of the 32 byte sense data
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* and sets up a related error recovery action .
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*
* PARAMETER
* sense sense data of the actual error
* erp pointer to the currently created default ERP
*
* RETURN VALUES
* erp_filled pointer to the ERP
*
*/
static struct dasd_ccw_req *
dasd_3990_erp_inspect_32 ( struct dasd_ccw_req * erp , char * sense )
{
struct dasd_device * device = erp - > device ;
erp - > function = dasd_3990_erp_inspect_32 ;
if ( sense [ 25 ] & DASD_SENSE_BIT_0 ) {
/* compound program action codes (byte25 bit 0 == '1') */
dasd_3990_erp_compound_retry ( erp , sense ) ;
} else {
/* single program action codes (byte25 bit 0 == '0') */
switch ( sense [ 25 ] ) {
case 0x00 : /* success - use default ERP for retries */
DEV_MESSAGE ( KERN_DEBUG , device , " %s " ,
" ERP called for successful request "
" - just retry " ) ;
break ;
case 0x01 : /* fatal error */
DEV_MESSAGE ( KERN_ERR , device , " %s " ,
" Fatal error should have been "
" handled within the interrupt handler " ) ;
erp = dasd_3990_erp_cleanup ( erp , DASD_CQR_FAILED ) ;
break ;
case 0x02 : /* intervention required */
case 0x03 : /* intervention required during dual copy */
erp = dasd_3990_erp_int_req ( erp ) ;
break ;
case 0x0F : /* length mismatch during update write command */
DEV_MESSAGE ( KERN_ERR , device , " %s " ,
" update write command error - should not "
" happen; \n "
" Please send this message together with "
" the above sense data to linux390@de. "
" ibm.com " ) ;
erp = dasd_3990_erp_cleanup ( erp , DASD_CQR_FAILED ) ;
break ;
case 0x10 : /* logging required for other channel program */
erp = dasd_3990_erp_action_10_32 ( erp , sense ) ;
break ;
case 0x15 : /* next track outside defined extend */
DEV_MESSAGE ( KERN_ERR , device , " %s " ,
" next track outside defined extend - "
" should not happen; \n "
" Please send this message together with "
" the above sense data to linux390@de. "
" ibm.com " ) ;
erp = dasd_3990_erp_cleanup ( erp , DASD_CQR_FAILED ) ;
break ;
case 0x1B : /* unexpected condition during write */
erp = dasd_3990_erp_action_1B_32 ( erp , sense ) ;
break ;
case 0x1C : /* invalid data */
DEV_MESSAGE ( KERN_EMERG , device , " %s " ,
" Data recovered during retry with PCI "
" fetch mode active " ) ;
/* not possible to handle this situation in Linux */
panic
( " Invalid data - No way to inform application "
" about the possibly incorrect data " ) ;
break ;
case 0x1D : /* state-change pending */
DEV_MESSAGE ( KERN_DEBUG , device , " %s " ,
" A State change pending condition exists "
" for the subsystem or device " ) ;
erp = dasd_3990_erp_action_4 ( erp , sense ) ;
break ;
case 0x1E : /* busy */
DEV_MESSAGE ( KERN_DEBUG , device , " %s " ,
" Busy condition exists "
" for the subsystem or device " ) ;
erp = dasd_3990_erp_action_4 ( erp , sense ) ;
break ;
default : /* all others errors - default erp */
break ;
}
}
return erp ;
} /* end dasd_3990_erp_inspect_32 */
/*
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* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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* main ERP control fuctions ( 24 and 32 byte sense )
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* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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*/
/*
* DASD_3990_ERP_INSPECT
*
* DESCRIPTION
* Does a detailed inspection for sense data by calling either
* the 24 - byte or the 32 - byte inspection routine .
*
* PARAMETER
* erp pointer to the currently created default ERP
* RETURN VALUES
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* erp_new contens was possibly modified
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*/
static struct dasd_ccw_req *
dasd_3990_erp_inspect ( struct dasd_ccw_req * erp )
{
struct dasd_ccw_req * erp_new = NULL ;
/* sense data are located in the refers record of the */
/* already set up new ERP ! */
char * sense = erp - > refers - > irb . ecw ;
/* distinguish between 24 and 32 byte sense data */
if ( sense [ 27 ] & DASD_SENSE_BIT_0 ) {
/* inspect the 24 byte sense data */
erp_new = dasd_3990_erp_inspect_24 ( erp , sense ) ;
} else {
/* inspect the 32 byte sense data */
erp_new = dasd_3990_erp_inspect_32 ( erp , sense ) ;
} /* end distinguish between 24 and 32 byte sense data */
return erp_new ;
}
/*
* DASD_3990_ERP_ADD_ERP
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*
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* DESCRIPTION
* This funtion adds an additional request block ( ERP ) to the head of
* the given cqr ( or erp ) .
* This erp is initialized as an default erp ( retry TIC )
*
* PARAMETER
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* cqr head of the current ERP - chain ( or single cqr if
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* first error )
* RETURN VALUES
* erp pointer to new ERP - chain head
*/
static struct dasd_ccw_req *
dasd_3990_erp_add_erp ( struct dasd_ccw_req * cqr )
{
struct dasd_device * device = cqr - > device ;
struct ccw1 * ccw ;
/* allocate additional request block */
struct dasd_ccw_req * erp ;
erp = dasd_alloc_erp_request ( ( char * ) & cqr - > magic , 2 , 0 , cqr - > device ) ;
if ( IS_ERR ( erp ) ) {
if ( cqr - > retries < = 0 ) {
DEV_MESSAGE ( KERN_ERR , device , " %s " ,
" Unable to allocate ERP request " ) ;
cqr - > status = DASD_CQR_FAILED ;
cqr - > stopclk = get_clock ( ) ;
} else {
DEV_MESSAGE ( KERN_ERR , device ,
" Unable to allocate ERP request "
" (%i retries left) " ,
cqr - > retries ) ;
dasd_set_timer ( device , ( HZ < < 3 ) ) ;
}
return cqr ;
}
/* initialize request with default TIC to current ERP/CQR */
ccw = erp - > cpaddr ;
ccw - > cmd_code = CCW_CMD_NOOP ;
ccw - > flags = CCW_FLAG_CC ;
ccw + + ;
ccw - > cmd_code = CCW_CMD_TIC ;
ccw - > cda = ( long ) ( cqr - > cpaddr ) ;
erp - > function = dasd_3990_erp_add_erp ;
erp - > refers = cqr ;
erp - > device = cqr - > device ;
erp - > magic = cqr - > magic ;
erp - > expires = 0 ;
erp - > retries = 256 ;
erp - > buildclk = get_clock ( ) ;
erp - > status = DASD_CQR_FILLED ;
return erp ;
}
/*
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* DASD_3990_ERP_ADDITIONAL_ERP
*
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* DESCRIPTION
* An additional ERP is needed to handle the current error .
* Add ERP to the head of the ERP - chain containing the ERP processing
* determined based on the sense data .
*
* PARAMETER
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* cqr head of the current ERP - chain ( or single cqr if
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* first error )
*
* RETURN VALUES
* erp pointer to new ERP - chain head
*/
static struct dasd_ccw_req *
dasd_3990_erp_additional_erp ( struct dasd_ccw_req * cqr )
{
struct dasd_ccw_req * erp = NULL ;
/* add erp and initialize with default TIC */
erp = dasd_3990_erp_add_erp ( cqr ) ;
/* inspect sense, determine specific ERP if possible */
if ( erp ! = cqr ) {
erp = dasd_3990_erp_inspect ( erp ) ;
}
return erp ;
} /* end dasd_3990_erp_additional_erp */
/*
* DASD_3990_ERP_ERROR_MATCH
*
* DESCRIPTION
* Check if the device status of the given cqr is the same .
* This means that the failed CCW and the relevant sense data
* must match .
* I don ' t distinguish between 24 and 32 byte sense because in case of
* 24 byte sense byte 25 and 27 is set as well .
*
* PARAMETER
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* cqr1 first cqr , which will be compared with the
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* cqr2 second cqr .
*
* RETURN VALUES
* match ' boolean ' for match found
* returns 1 if match found , otherwise 0.
*/
static int
dasd_3990_erp_error_match ( struct dasd_ccw_req * cqr1 , struct dasd_ccw_req * cqr2 )
{
/* check failed CCW */
if ( cqr1 - > irb . scsw . cpa ! = cqr2 - > irb . scsw . cpa ) {
// return 0; /* CCW doesn't match */
}
/* check sense data; byte 0-2,25,27 */
if ( ! ( ( memcmp ( cqr1 - > irb . ecw , cqr2 - > irb . ecw , 3 ) = = 0 ) & &
( cqr1 - > irb . ecw [ 27 ] = = cqr2 - > irb . ecw [ 27 ] ) & &
( cqr1 - > irb . ecw [ 25 ] = = cqr2 - > irb . ecw [ 25 ] ) ) ) {
return 0 ; /* sense doesn't match */
}
return 1 ; /* match */
} /* end dasd_3990_erp_error_match */
/*
* DASD_3990_ERP_IN_ERP
*
* DESCRIPTION
* check if the current error already happened before .
* quick exit if current cqr is not an ERP ( cqr - > refers = NULL )
*
* PARAMETER
* cqr failed cqr ( either original cqr or already an erp )
*
* RETURN VALUES
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* erp erp - pointer to the already defined error
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* recovery procedure OR
* NULL if a ' new ' error occurred .
*/
static struct dasd_ccw_req *
dasd_3990_erp_in_erp ( struct dasd_ccw_req * cqr )
{
struct dasd_ccw_req * erp_head = cqr , /* save erp chain head */
* erp_match = NULL ; /* save erp chain head */
int match = 0 ; /* 'boolean' for matching error found */
if ( cqr - > refers = = NULL ) { /* return if not in erp */
return NULL ;
}
/* check the erp/cqr chain for current error */
do {
match = dasd_3990_erp_error_match ( erp_head , cqr - > refers ) ;
erp_match = cqr ; /* save possible matching erp */
cqr = cqr - > refers ; /* check next erp/cqr in queue */
} while ( ( cqr - > refers ! = NULL ) & & ( ! match ) ) ;
if ( ! match ) {
return NULL ; /* no match was found */
}
return erp_match ; /* return address of matching erp */
} /* END dasd_3990_erp_in_erp */
/*
* DASD_3990_ERP_FURTHER_ERP ( 24 & 32 byte sense )
*
* DESCRIPTION
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* No retry is left for the current ERP . Check what has to be done
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* with the ERP .
* - do further defined ERP action or
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* - wait for interrupt or
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* - exit with permanent error
*
* PARAMETER
* erp ERP which is in progress with no retry left
*
* RETURN VALUES
* erp modified / additional ERP
*/
static struct dasd_ccw_req *
dasd_3990_erp_further_erp ( struct dasd_ccw_req * erp )
{
struct dasd_device * device = erp - > device ;
char * sense = erp - > irb . ecw ;
/* check for 24 byte sense ERP */
if ( ( erp - > function = = dasd_3990_erp_bus_out ) | |
( erp - > function = = dasd_3990_erp_action_1 ) | |
( erp - > function = = dasd_3990_erp_action_4 ) ) {
erp = dasd_3990_erp_action_1 ( erp ) ;
} else if ( erp - > function = = dasd_3990_erp_action_5 ) {
/* retries have not been successful */
/* prepare erp for retry on different channel path */
erp = dasd_3990_erp_action_1 ( erp ) ;
if ( ! ( sense [ 2 ] & DASD_SENSE_BIT_0 ) ) {
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/* issue a Diagnostic Control command with an
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* Inhibit Write subcommand */
switch ( sense [ 25 ] ) {
case 0x17 :
case 0x57 : { /* controller */
erp = dasd_3990_erp_DCTL ( erp , 0x20 ) ;
break ;
}
case 0x18 :
case 0x58 : { /* channel path */
erp = dasd_3990_erp_DCTL ( erp , 0x40 ) ;
break ;
}
case 0x19 :
case 0x59 : { /* storage director */
erp = dasd_3990_erp_DCTL ( erp , 0x80 ) ;
break ;
}
default :
DEV_MESSAGE ( KERN_DEBUG , device ,
" invalid subcommand modifier 0x%x "
" for Diagnostic Control Command " ,
sense [ 25 ] ) ;
}
}
/* check for 32 byte sense ERP */
} else if ( ( erp - > function = = dasd_3990_erp_compound_retry ) | |
( erp - > function = = dasd_3990_erp_compound_path ) | |
( erp - > function = = dasd_3990_erp_compound_code ) | |
( erp - > function = = dasd_3990_erp_compound_config ) ) {
erp = dasd_3990_erp_compound ( erp , sense ) ;
} else {
/* No retry left and no additional special handling */
/*necessary */
DEV_MESSAGE ( KERN_ERR , device ,
" no retries left for erp %p - "
" set status to FAILED " , erp ) ;
erp - > status = DASD_CQR_FAILED ;
}
return erp ;
} /* end dasd_3990_erp_further_erp */
/*
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* DASD_3990_ERP_HANDLE_MATCH_ERP
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*
* DESCRIPTION
* An error occurred again and an ERP has been detected which is already
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* used to handle this error ( e . g . retries ) .
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* All prior ERP ' s are asumed to be successful and therefore removed
* from queue .
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* If retry counter of matching erp is already 0 , it is checked if further
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* action is needed ( besides retry ) or if the ERP has failed .
*
* PARAMETER
* erp_head first ERP in ERP - chain
* erp ERP that handles the actual error .
* ( matching erp )
*
* RETURN VALUES
* erp modified / additional ERP
*/
static struct dasd_ccw_req *
dasd_3990_erp_handle_match_erp ( struct dasd_ccw_req * erp_head ,
struct dasd_ccw_req * erp )
{
struct dasd_device * device = erp_head - > device ;
struct dasd_ccw_req * erp_done = erp_head ; /* finished req */
struct dasd_ccw_req * erp_free = NULL ; /* req to be freed */
/* loop over successful ERPs and remove them from chanq */
while ( erp_done ! = erp ) {
if ( erp_done = = NULL ) /* end of chain reached */
panic ( PRINTK_HEADER " Programming error in ERP! The "
" original request was lost \n " ) ;
/* remove the request from the device queue */
list_del ( & erp_done - > list ) ;
erp_free = erp_done ;
erp_done = erp_done - > refers ;
/* free the finished erp request */
dasd_free_erp_request ( erp_free , erp_free - > device ) ;
} /* end while */
if ( erp - > retries > 0 ) {
char * sense = erp - > refers - > irb . ecw ;
/* check for special retries */
if ( erp - > function = = dasd_3990_erp_action_4 ) {
erp = dasd_3990_erp_action_4 ( erp , sense ) ;
} else if ( erp - > function = = dasd_3990_erp_action_1B_32 ) {
erp = dasd_3990_update_1B ( erp , sense ) ;
} else if ( erp - > function = = dasd_3990_erp_int_req ) {
erp = dasd_3990_erp_int_req ( erp ) ;
} else {
/* simple retry */
DEV_MESSAGE ( KERN_DEBUG , device ,
" %i retries left for erp %p " ,
erp - > retries , erp ) ;
/* handle the request again... */
erp - > status = DASD_CQR_QUEUED ;
}
} else {
/* no retry left - check for further necessary action */
/* if no further actions, handle rest as permanent error */
erp = dasd_3990_erp_further_erp ( erp ) ;
}
return erp ;
} /* end dasd_3990_erp_handle_match_erp */
/*
* DASD_3990_ERP_ACTION
*
* DESCRIPTION
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* control routine for 3990 erp actions .
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* Has to be called with the queue lock ( namely the s390_irq_lock ) acquired .
*
* PARAMETER
* cqr failed cqr ( either original cqr or already an erp )
*
* RETURN VALUES
* erp erp - pointer to the head of the ERP action chain .
* This means :
* - either a ptr to an additional ERP cqr or
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* - the original given cqr ( which ' s status might
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* be modified )
*/
struct dasd_ccw_req *
dasd_3990_erp_action ( struct dasd_ccw_req * cqr )
{
struct dasd_ccw_req * erp = NULL ;
struct dasd_device * device = cqr - > device ;
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struct dasd_ccw_req * temp_erp = NULL ;
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if ( device - > features & DASD_FEATURE_ERPLOG ) {
/* print current erp_chain */
DEV_MESSAGE ( KERN_ERR , device , " %s " ,
" ERP chain at BEGINNING of ERP-ACTION " ) ;
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for ( temp_erp = cqr ;
temp_erp ! = NULL ; temp_erp = temp_erp - > refers ) {
DEV_MESSAGE ( KERN_ERR , device ,
" erp %p (%02x) refers to %p " ,
temp_erp , temp_erp - > status ,
temp_erp - > refers ) ;
}
}
/* double-check if current erp/cqr was successfull */
if ( ( cqr - > irb . scsw . cstat = = 0x00 ) & &
( cqr - > irb . scsw . dstat = = ( DEV_STAT_CHN_END | DEV_STAT_DEV_END ) ) ) {
DEV_MESSAGE ( KERN_DEBUG , device ,
" ERP called for successful request %p "
" - NO ERP necessary " , cqr ) ;
cqr - > status = DASD_CQR_DONE ;
return cqr ;
}
/* check if sense data are available */
if ( ! cqr - > irb . ecw ) {
DEV_MESSAGE ( KERN_DEBUG , device ,
" ERP called witout sense data avail ... "
" request %p - NO ERP possible " , cqr ) ;
cqr - > status = DASD_CQR_FAILED ;
return cqr ;
}
/* check if error happened before */
erp = dasd_3990_erp_in_erp ( cqr ) ;
if ( erp = = NULL ) {
/* no matching erp found - set up erp */
erp = dasd_3990_erp_additional_erp ( cqr ) ;
} else {
/* matching erp found - set all leading erp's to DONE */
erp = dasd_3990_erp_handle_match_erp ( cqr , erp ) ;
}
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if ( device - > features & DASD_FEATURE_ERPLOG ) {
/* print current erp_chain */
DEV_MESSAGE ( KERN_ERR , device , " %s " ,
" ERP chain at END of ERP-ACTION " ) ;
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for ( temp_erp = erp ;
temp_erp ! = NULL ; temp_erp = temp_erp - > refers ) {
DEV_MESSAGE ( KERN_ERR , device ,
" erp %p (%02x) refers to %p " ,
temp_erp , temp_erp - > status ,
temp_erp - > refers ) ;
}
}
/* enqueue added ERP request */
if ( erp - > status = = DASD_CQR_FILLED ) {
erp - > status = DASD_CQR_QUEUED ;
list_add ( & erp - > list , & device - > ccw_queue ) ;
}
return erp ;
} /* end dasd_3990_erp_action */
