diff options
Diffstat (limited to 'usr/src/uts/common/sys/scsi/conf/autoconf.h')
| -rw-r--r-- | usr/src/uts/common/sys/scsi/conf/autoconf.h | 36 |
1 files changed, 32 insertions, 4 deletions
diff --git a/usr/src/uts/common/sys/scsi/conf/autoconf.h b/usr/src/uts/common/sys/scsi/conf/autoconf.h index 757732cb09..8d0903dee5 100644 --- a/usr/src/uts/common/sys/scsi/conf/autoconf.h +++ b/usr/src/uts/common/sys/scsi/conf/autoconf.h @@ -19,15 +19,13 @@ * CDDL HEADER END */ /* - * Copyright 2008 Sun Microsystems, Inc. All rights reserved. + * Copyright 2009 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. */ #ifndef _SYS_SCSI_CONF_AUTOCONF_H #define _SYS_SCSI_CONF_AUTOCONF_H -#pragma ident "%Z%%M% %I% %E% SMI" - #ifdef __cplusplus extern "C" { #endif @@ -75,6 +73,9 @@ extern "C" { #define SCSI_OPTIONS_NLUNS_8 0x20000 #define SCSI_OPTIONS_NLUNS_16 0x30000 #define SCSI_OPTIONS_NLUNS_32 0x40000 +#define SCSI_OPTIONS_NLUNS_64 0x50000 +#define SCSI_OPTIONS_NLUNS_128 0x60000 +#define SCSI_OPTIONS_NLUNS_256 0x70000 #define SCSI_OPTIONS_NLUNS(n) ((n) & SCSI_OPTIONS_NLUNS_MASK) @@ -153,14 +154,41 @@ extern "C" { #define SCSI_DEFAULT_SELECTION_TIMEOUT 250 /* - * Kernel references + * SCSI subsystem scsi_enumeration options. + * + * Knob for SPI (SCSI Parallel Intrconnect) enumeration. Unless an HBA defines + * it's own tran_bus_config, SPI enumeration is used. The "scsi_enumeration" + * knob determines how SPI enumeration is performed. + * + * The global variable "scsi_enumeration" is used as the default value of the + * "scsi-enumeration" property. In addition to enabling/disabling enumeration + * (bit 0), target and lun threading can be specified. Having things + * multi-threaded does not guarantee reduce configuration time, however when + * the bus is marginal multi-threading can substaintaly reduce configuration + * time because targets negotiate to stable transfer speeds in parallel - so + * all targets have stabalized by the time the sequential attach(9E) operations + * begin. Running multi-threaded also helps verification of framework and HBA + * locking: a BUS_CONFIG_ALL is equivalent to every target and lun combination + * getting a BUS_CONFIG_ONE from a separate thread at the same time. A disable + * mechanism is provided to accomidate buggy HBAs (set scsi-enumeration=7 + * driver.conf). Values are: + * + * 0 driver.conf enumeration + * 1 dynamic enumeration with target and lun multi-threading. + * 3 dynamic enumeration with lun multi-threading disabled. + * 5 dynamic enumeration with target multi-threading disabled; + * 7 dynamic enumeration with target/lun multi-threading disabled. */ +#define SCSI_ENUMERATION_ENABLE 0x1 +#define SCSI_ENUMERATION_MT_LUN_DISABLE 0x2 +#define SCSI_ENUMERATION_MT_TARGET_DISABLE 0x4 #ifdef _KERNEL /* * Global SCSI config variables / options */ extern int scsi_options; +extern int scsi_enumeration; extern unsigned int scsi_reset_delay; /* specified in milli seconds */ extern int scsi_tag_age_limit; extern int scsi_watchdog_tick; |