glm(7D) Devices glm(7D)NAMEglm - GLM SCSI Host Bus Adapter Driver
SYNOPSIS
scsi@unit-address
DESCRIPTION
The glm Host Bus Adapter driver is a SCSA compliant nexus driver that
supports the LSI 53c810, LSI 53c875, LSI 53c876, LSI 53C896 and LSI
53C1010 SCSI chips
It supports the standard functions provided by the SCSA interface. That
is, it supports tagged and untagged queuing, Narrow/Wide/Fast/Ultra
SCSI/Ultra SCSI 2/Ultra SCSI 3, and auto request sense, but it does not
support linked commands.
Driver Configuration
Configure the glm driver by defining properties in glm.conf. These
properties override the global SCSI settings. glm supports these prop‐
erties which can be modified by the user: scsi-options, target<n>-scsi-
options, scsi-reset-delay, scsi-tag-age-limit, scsi-watchdog-tick, and
scsi-initiator-id.
target<n>-scsi-options overrides the scsi-options property value for
target<n>. <n> can vary from decimal 0 to 15. glm supports these scsi-
options: SCSI_OPTIONS_DR, SCSI_OPTIONS_SYNC, SCSI_OPTIONS_TAG,
SCSI_OPTIONS_FAST, SCSI_OPTIONS_WIDE, SCSI_OPTIONS_FAST20,
SCSI_OPTIONS_FAST40 and SCSI_OPTIONS_FAST80.
After periodic interval scsi-watchdog-tick, the glm driver searches
through all current and disconnected commands for timeouts.
scsi-tag-age-limit is the number of times that the glm driver attempts
to allocate a particular tag ID that is currently in use after going
through all tag IDs in a circular fashion. After finding the same tag
ID in use scsi-tag-age-limit times, no more commands will be submitted
to this target until all outstanding commands complete or timeout.
Refer to scsi_hba_attach(9F).
EXAMPLES
Example 1: Using the glm Configuration File
Create a file called /kernel/drv/glm.conf and add the following line:
scsi-options=0x78;
This disables tagged queuing, Fast/Ultra SCSI and wide mode for all glm
instances.
The following example disables an option for one specific glm (refer to
driver.conf(4) and pci(4) for more details):
name="glm" parent="/pci@1f,4000"
unit-address="3"
target1-scsi-options=0x58
scsi-options=0x178 scsi-initiator-id=6;
Note that the default initiator ID in OBP is 7 and that the change to
ID 6 will occur at attach time. It may be preferable to change the ini‐
tiator ID in OBP.
The example above sets scsi-options for target 1 to 0x58 and all other
targets on this SCSI bus to 0x178.
The physical pathname of the parent can be determined using the
/devices tree or following the link of the logical device name:
# ls -l /dev/rdsk/c0t0d0s0
lrwxrwxrwx 1 root root 45 May 16 10:08 /dev/rdsk/c0t0d0s0 ->
../../devices/pci@1f,4000/scsi@3/sd@0,0:a,raw
In this case, like the example above, the parent is /pci@1f,4000 and
the unit-address is the number bound to the scsi@3 node.
To set scsi-options more specifically per target:
target1-scsi-options=0x78;
device-type-scsi-options-list =
"SEAGATE ST32550W", "seagate-scsi-options" ;
seagate-scsi-options = 0x58;
scsi-options=0x3f8;
The above sets scsi-options for target 1 to 0x78 and for all other tar‐
gets on this SCSI bus to 0x3f8 except for one specific disk type which
will have scsi-options set to 0x58.
scsi-options specified per target ID have the highest precedence, fol‐
lowed by scsi-options per device type. Global scsi-options (for all
glm instances) per bus have the lowest precedence.
The system needs to be rebooted before the specified scsi-options take
effect.
Driver Capabilities
The target driver needs to set capabilities in the glm driver in order
to enable some driver features. The target driver can query and mod‐
ify these capabilities: synchronous, tagged-qing, wide-xfer, auto-
rqsense, qfull-retries, qfull-retry-interval. All other capabilities
can only be queried.
By default, tagged-qing, auto-rqsense, and wide-xfer capabilities are
disabled, while disconnect, synchronous, and untagged-qing are enabled.
These capabilities can only have binary values (0 or 1). The default
value for qfull-retries is 10 and the default value for qfull-retry-
interval is 100. The qfull-retries capability is a uchar_t (0 to 255)
while qfull-retry-interval is a ushort_t (0 to 65535).
The target driver needs to enable tagged-qing and wide-xfer explicitly.
The untagged-qing capability is always enabled and its value cannot be
modified.
Whenever there is a conflict between the value of scsi-options and a
capability, the value set in scsi-options prevails. Only whom != 0 is
supported in the scsi_ifsetcap(9F) call.
Refer to scsi_ifsetcap(9F) and scsi_ifgetcap(9F) for details.
FILES
/kernel/drv/glm ELF Kernel Module
/kernel/drv/glm.conf Optional configuration file
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
┌────────────────────────┬──────────────────────────────────┐
│ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
├────────────────────────┼──────────────────────────────────┤
│Architecture │Limited to PCI-based systems with │
│ │LSI 53c810, LSI 53c875, LSI │
│ │53c876, LSI 53c896 and LSI │
│ │53c1010 SCSI I/O processors │
└────────────────────────┴──────────────────────────────────┘
SEE ALSOprtconf(1M), driver.conf(4), pci(4), attributes(5), scsi_abort(9F),
scsi_hba_attach(9F), scsi_ifgetcap(9F), scsi_ifsetcap(9F),
scsi_reset(9F), scsi_sync_pkt(9F), scsi_transport(9F), scsi_device(9S),
scsi_extended_sense(9S), scsi_inquiry(9S), scsi_pkt(9S)
Writing Device Drivers
ANSI Small Computer System Interface-2 (SCSI-2),
LSI Logi Inc (formerly Symbios Logic Inc.):
· SYM53c810 PCI-SCSI I/O processor with Narrow operation
· SYM53c875 PCI-SCSI I/O Processor With Fast-20
· SYM53c876 PCI-SCSI I/O processor Dual channel Fast-20
· SYM53c896 PCI-SCSI I/O processor Dual channel Fast-40
· SYM53c1010 PCI-SCSI I/O processor Dual Channel Fast-80
DIAGNOSTICS
The messages described below are some that may appear on the system
console, as well as being logged.
Device is using a hilevel intr
The device was configured with an interrupt level that cannot be
used with this glm driver. Check the PCI device.
map setup failed
Driver was unable to map device registers; check for bad hardware.
Driver did not attach to device; SCSI devices will be inaccessible.
glm_script_alloc failed
The driver was unable to load the SCRIPTS for the SCSI processor,
check for bad hardware. Driver did not attach to device; SCSI
devices will be inaccessible.
cannot map configuration space.
The driver was unable to map in the configuration registers. Check
for bad hardware. SCSI devices will be inaccessible.
attach failed
The driver was unable to attach; usually preceded by another warn‐
ing that indicates why attach failed. These can be considered
hardware failures.
SCSI bus DATA IN phase parity error
The driver detected parity errors on the SCSI bus.
SCSI bus MESSAGE IN phase parity error
The driver detected parity errors on the SCSI bus.
SCSI bus STATUS phase parity error
The driver detected parity errors on the SCSI bus.
Unexpected bus free
Target disconnected from the bus without notice. Check for bad
hardware.
Disconnected command timeout for Target <id>.<lun>
A timeout occurred while target id/lun was disconnected. This is
usually a target firmware problem. For tagged queuing targets, <n>
commands were outstanding when the timeout was detected.
Disconnected tagged cmd(s) (<n>) timeout for Target<id>.<lun>
A timeout occurred while target id/lun was disconnected. This is
usually a target firmware problem. For tagged queuing targets, <n>
commands were outstanding when the timeout was detected.
Connected command timeout for Target <id>.<lun>
This is usually a SCSI bus problem. Check cables and termination.
Target <id> reducing sync. transfer rate
A data transfer hang or DATA-IN phase parity error was detected.
The driver attempts to eliminate this problem by reducing the data
transfer rate.
Target <id> reverting to async. mode
A second data transfer hang was detected for this target. The
driver attempts to eliminate this problem by reducing the data
transfer rate.
Target <id> disabled wide SCSI mode
A second data phase hang was detected for this target. The driver
attempts to eliminate this problem by disabling wide SCSI mode.
auto request sense failed
An attempt to start an auto request packet failed. Another auto
request packet may already be in transport.
invalid reselection (<id>.<lun>)
A reselection failed; target accepted abort or reset, but still
tries to reconnect. Check for bad hardware.
invalid intcode
The SCRIPTS processor generated an invalid SCRIPTS interrupt. Check
for bad hardware.
NOTES
The glm driver supports the following LSI chips:
· LSI 53C810, which supports Narrow, Fast SCSI mode. The maximum
SCSI bandwidth is 10 MB/sec.
· LSI 53C875, which supports Wide, Fast, and Ultra SCSI mode. The
maximum SCSI bandwidth is 40 MB/sec.
· LSI 53C896, which supports Wide, Fast and Ultra SCSI 2 mode. The
maximum LVD SCSI bandwidth is 80 MB/sec.
· LSI 53c1010, which supports wide, Fast and Ultra SCSI 3 mode. The
maximum LVD SCSI bandwidth is 160 MB/sec.
The glm driver exports properties indicating per target the negotiated
transfer speed (target<n>-sync-speed), whether wide bus is supported
(target<n>-wide), for that particular target (target<n>-scsi-options),
and whether tagged queuing has been enabled (target<n>-TQ). The sync-
speed property value is the data transfer rate in KB/sec. The tar‐
get<n>-TQ and the target<n>-wide property have value 1 to indicate that
the corresponding capability is enabled, or 0 to indicate that the
capability is disabled for that target. Refer to prtconf(1M) (verbose
option) for viewing the glm properties.
scsi, instance #0
Driver properties:
name <target6-TQ> length <4>
value <0x00000000>.
name <target6-wide> length <4>
value <0x00000000>.
name <target6-sync-speed> length <4>
value <0x00002710>.
name <target1-TQ> length <4>
value <0x00000001>.
name <target1-wide> length <4>
value <0x00000000>.
name <target1-sync-speed> length <4>
value <0x00002710>.
name <target0-TQ> length <4>
value <0x00000001>.
name <target0-wide> length <4>
value <0x00000001>.
name <target0-sync-speed> length <4>
value <0x00009c40>.
name <scsi-options> length <4>
value <0x000007f8>.
name <scsi-watchdog-tick> length <4>
value <0x0000000a>.
name <scsi-tag-age-limit> length <4>
value <0x00000002>.
name <scsi-reset-delay> length <4>
value <0x00000bb8>.
name <latency-timer> length <4>
value <0x00000088>.
name <cache-line-size> length <4>
value <0x00000010>.
SunOS 5.10 20 Jul 2001 glm(7D)
