AdvanSys Driver Notes¶

AdvanSys (Advanced System Products, Inc.) manufactures the following RISC-based, Bus-Mastering, Fast (10 Mhz) and Ultra (20 Mhz) Narrow (8-bit transfer) SCSI Host Adapters for the ISA, EISA, VL, and PCI buses and RISC-based, Bus-Mastering, Ultra (20 Mhz) Wide (16-bit transfer) SCSI Host Adapters for the PCI bus.

The CDB counts below indicate the number of SCSI CDB (Command Descriptor Block) requests that can be stored in the RISC chip cache and board LRAM. A CDB is a single SCSI command. The driver detect routine will display the number of CDBs available for each adapter detected. The number of CDBs used by the driver can be lowered in the BIOS by changing the ‘Host Queue Size’ adapter setting.

Laptop Products:

ABP-480 - Bus-Master CardBus (16 CDB)

Connectivity Products:

ABP510/5150 - Bus-Master ISA (240 CDB)
ABP5140 - Bus-Master ISA PnP (16 CDB)
ABP5142 - Bus-Master ISA PnP with floppy (16 CDB)
ABP902/3902 - Bus-Master PCI (16 CDB)
ABP3905 - Bus-Master PCI (16 CDB)
ABP915 - Bus-Master PCI (16 CDB)
ABP920 - Bus-Master PCI (16 CDB)
ABP3922 - Bus-Master PCI (16 CDB)
ABP3925 - Bus-Master PCI (16 CDB)
ABP930 - Bus-Master PCI (16 CDB)
ABP930U - Bus-Master PCI Ultra (16 CDB)
ABP930UA - Bus-Master PCI Ultra (16 CDB)
ABP960 - Bus-Master PCI MAC/PC (16 CDB)
ABP960U - Bus-Master PCI MAC/PC Ultra (16 CDB)

Single Channel Products:

ABP542 - Bus-Master ISA with floppy (240 CDB)
ABP742 - Bus-Master EISA (240 CDB)
ABP842 - Bus-Master VL (240 CDB)
ABP940 - Bus-Master PCI (240 CDB)
ABP940U - Bus-Master PCI Ultra (240 CDB)
ABP940UA/3940UA - Bus-Master PCI Ultra (240 CDB)
ABP970 - Bus-Master PCI MAC/PC (240 CDB)
ABP970U - Bus-Master PCI MAC/PC Ultra (240 CDB)
ABP3960UA - Bus-Master PCI MAC/PC Ultra (240 CDB)
ABP940UW/3940UW - Bus-Master PCI Ultra-Wide (253 CDB)
ABP970UW - Bus-Master PCI MAC/PC Ultra-Wide (253 CDB)
ABP3940U2W - Bus-Master PCI LVD/Ultra2-Wide (253 CDB)

Multi-Channel Products:

ABP752 - Dual Channel Bus-Master EISA (240 CDB Per Channel)
ABP852 - Dual Channel Bus-Master VL (240 CDB Per Channel)
ABP950 - Dual Channel Bus-Master PCI (240 CDB Per Channel)
ABP950UW - Dual Channel Bus-Master PCI Ultra-Wide (253 CDB Per Channel)
ABP980 - Four Channel Bus-Master PCI (240 CDB Per Channel)
ABP980U - Four Channel Bus-Master PCI Ultra (240 CDB Per Channel)
ABP980UA/3980UA - Four Channel Bus-Master PCI Ultra (16 CDB Per Chan.)
ABP3950U2W - Bus-Master PCI LVD/Ultra2-Wide and Ultra-Wide (253 CDB)
ABP3950U3W - Bus-Master PCI Dual LVD2/Ultra3-Wide (253 CDB)

Driver Compile Time Options and Debugging¶

The following constants can be defined in the source file.

ADVANSYS_ASSERT - Enable driver assertions (Def: Enabled)

Enabling this option adds assertion logic statements to the driver. If an assertion fails a message will be displayed to the console, but the system will continue to operate. Any assertions encountered should be reported to the person responsible for the driver. Assertion statements may proactively detect problems with the driver and facilitate fixing these problems. Enabling assertions will add a small overhead to the execution of the driver.
ADVANSYS_DEBUG - Enable driver debugging (Def: Disabled)

Enabling this option adds tracing functions to the driver and the ability to set a driver tracing level at boot time. This option is very useful for debugging the driver, but it will add to the size of the driver execution image and add overhead to the execution of the driver.

The amount of debugging output can be controlled with the global variable ‘asc_dbglvl’. The higher the number the more output. By default the debug level is 0.

If the driver is loaded at boot time and the LILO Driver Option is included in the system, the debug level can be changed by specifying a 5th (ASC_NUM_IOPORT_PROBE + 1) I/O Port. The first three hex digits of the pseudo I/O Port must be set to ‘deb’ and the fourth hex digit specifies the debug level: 0 - F. The following command line will look for an adapter at 0x330 and set the debug level to 2:
```
linux advansys=0x330,0,0,0,0xdeb2
```
If the driver is built as a loadable module this variable can be defined when the driver is loaded. The following insmod command will set the debug level to one:
```
insmod advansys.o asc_dbglvl=1
```
Debugging Message Levels:

0 Errors Only

1 High-Level Tracing

2-N Verbose Tracing

To enable debug output to console, please make sure that:
1. System and kernel logging is enabled (syslogd, klogd running).
2. Kernel messages are routed to console output. Check /etc/syslog.conf for an entry similar to this:
```
kern.*                  /dev/console
```
3. klogd is started with the appropriate -c parameter (e.g. klogd -c 8)
This will cause printk() messages to be displayed on the current console. Refer to the klogd(8) and syslogd(8) man pages for details.

Alternatively you can enable printk() to console with this program. However, this is not the ‘official’ way to do this.

Debug output is logged in /var/log/messages.
```
main()
{
        syscall(103, 7, 0, 0);
}
```
Increasing LOG_BUF_LEN in kernel/printk.c to something like 40960 allows more debug messages to be buffered in the kernel and written to the console or log file.
ADVANSYS_STATS - Enable statistics (Def: Enabled)

Enabling this option adds statistics collection and display through /proc to the driver. The information is useful for monitoring driver and device performance. It will add to the size of the driver execution image and add minor overhead to the execution of the driver.

Statistics are maintained on a per adapter basis. Driver entry point call counts and transfer size counts are maintained. Statistics are only available for kernels greater than or equal to v1.3.0 with the CONFIG_PROC_FS (/proc) file system configured.

AdvanSys SCSI adapter files have the following path name format:
```
/proc/scsi/advansys/{0,1,2,3,...}
```
This information can be displayed with cat. For example:
```
cat /proc/scsi/advansys/0
```
When ADVANSYS_STATS is not defined the AdvanSys /proc files only contain adapter and device configuration information.

Driver LILO Option¶

If init/main.c is modified as described in the ‘Directions for Adding the AdvanSys Driver to Linux’ section (B.4.) above, the driver will recognize the ‘advansys’ LILO command line and /etc/lilo.conf option. This option can be used to either disable I/O port scanning or to limit scanning to 1 - 4 I/O ports. Regardless of the option setting EISA and PCI boards will still be searched for and detected. This option only affects searching for ISA and VL boards.

Examples:

Eliminate I/O port scanning:

boot:

linux advansys=

or:

boot: linux advansys=0x0

Limit I/O port scanning to one I/O port:

boot:
```
linux advansys=0x110
```
Limit I/O port scanning to four I/O ports:

boot:
```
linux advansys=0x110,0x210,0x230,0x330
```

For a loadable module the same effect can be achieved by setting the ‘asc_iopflag’ variable and ‘asc_ioport’ array when loading the driver, e.g.:

insmod advansys.o asc_iopflag=1 asc_ioport=0x110,0x330

If ADVANSYS_DEBUG is defined a 5th (ASC_NUM_IOPORT_PROBE + 1) I/O Port may be added to specify the driver debug level. Refer to the ‘Driver Compile Time Options and Debugging’ section above for more information.

Credits (Chronological Order)¶

Bob Frey <bfrey@turbolinux.com.cn> wrote the AdvanSys SCSI driver and maintained it up to 3.3F. He continues to answer questions and help maintain the driver.

Nathan Hartwell <mage@cdc3.cdc.net> provided the directions and basis for the Linux v1.3.X changes which were included in the 1.2 release.

Thomas E Zerucha <zerucha@shell.portal.com> pointed out a bug in advansys_biosparam() which was fixed in the 1.3 release.

Erik Ratcliffe <erik@caldera.com> has done testing of the AdvanSys driver in the Caldera releases.

Rik van Riel <H.H.vanRiel@fys.ruu.nl> provided a patch to AscWaitTixISRDone() which he found necessary to make the driver work with a SCSI-1 disk.

Mark Moran <mmoran@mmoran.com> has helped test Ultra-Wide support in the 3.1A driver.

Doug Gilbert <dgilbert@interlog.com> has made changes and suggestions to improve the driver and done a lot of testing.

Ken Mort <ken@mort.net> reported a DEBUG compile bug fixed in 3.2K.

Tom Rini <trini@kernel.crashing.org> provided the CONFIG_ISA patch and helped with PowerPC wide and narrow board support.

Philip Blundell <philb@gnu.org> provided an advansys_interrupts_enabled patch.

Dave Jones <dave@denial.force9.co.uk> reported the compiler warnings generated when CONFIG_PROC_FS was not defined in the 3.2M driver.

Jerry Quinn <jlquinn@us.ibm.com> fixed PowerPC support (endian problems) for wide cards.

Bryan Henderson <bryanh@giraffe-data.com> helped debug narrow card error handling.

Manuel Veloso <veloso@pobox.com> worked hard on PowerPC narrow board support and fixed a bug in AscGetEEPConfig().

Arnaldo Carvalho de Melo <acme@conectiva.com.br> made save_flags/restore_flags changes.

Andy Kellner <AKellner@connectcom.net> continued the Advansys SCSI driver development for ConnectCom (Version > 3.3F).

Ken Witherow for extensive testing during the development of version 3.4.

0	Errors Only
1	High-Level Tracing
2-N	Verbose Tracing