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1 BusLogic MultiMaster and FlashPoint SCSI Driver for Linux
19 BusLogic, Inc. designed and manufactured a variety of high performance SCSI
23 supported by this driver originated under the BusLogic name and so that name is
24 retained in the source code and documentation.
26 This driver supports all present BusLogic MultiMaster Host Adapters, and should
29 costly and rely on the host CPU, rather than including an onboard processor.
31 well and have very low command latency. BusLogic has recently provided me with
32 the FlashPoint Driver Developer's Kit, which comprises documentation and freely
34 is the library of code that runs on the host CPU and performs functions
40 to achieve the full performance that BusLogic SCSI Host Adapters and modern
41 SCSI peripherals are capable of, and to provide a highly robust driver that can
45 tune driver performance and error recovery to their particular needs.
48 well as the most recent release of this driver and the latest firmware for the
54 driver and SCSI subsystem at startup, along with any subsequent system messages
55 relevant to SCSI operations, and a detailed description of your system's
58 Mylex has been an excellent company to work with and I highly recommend their
61 the BT-948 PCI Ultra SCSI Host Adapter, and then again for the BT-958 PCI Wide
63 Mylex received a degree and kind of testing that their own testing group cannot
64 readily achieve, and the Linux community has available high performance host
68 workings of their products, and in turn to educate them about the needs and
72 Linux community, and I am now working on a Linux driver for the DAC960 PCI RAID
73 Controllers. Mylex's interest and support is greatly appreciated.
76 problem and are running Linux, they will not tell you that your use of their
82 94555, USA and can be reached at 510/796-6100 or on the World Wide Web at
85 Contact information for offices in Europe and Japan is available on the Web
91 o Configuration Reporting and Testing
95 requested and negotiated with each target device. AutoSCSI settings for
96 Synchronous Negotiation, Wide Negotiation, and Disconnect/Reconnect are
105 Synchronous negotiation is enabled for all target devices and the host
110 Synchronous negotiation is enabled for all target devices and the host
115 Synchronous negotiation is enabled for all target devices and the host
120 Synchronous negotiation is disabled and all target devices are limited to
126 and 4 through 15, to Fast speed for target device 1, to Slow speed for
127 target device 2, and is not permitted to target device 3. The host
130 The status of Wide Negotiation, Disconnect/Reconnect, and Tagged Queuing
131 are reported as "Enabled", Disabled", or a sequence of "Y" and "N" letters.
135 BusLogic SCSI Host Adapters directly implement SCSI-2 Tagged Queuing, and so
139 device or logical unit, and can improve I/O performance substantially. In
141 performance, and scatter/gather I/O can support as many segments as can be
146 is determined automatically based on the host adapter's total queue depth and
147 the number, type, speed, and capabilities of the target devices found. In
157 a selection is made between a full host adapter hard reset and SCSI bus reset
161 and also include sending a bus device reset to the specific target device
164 the bus device reset error recovery strategy is selected and sending a bus
166 reset will force a full host adapter hard reset and SCSI bus reset. SCSI bus
167 resets caused by other devices and detected by the host adapter are also
168 handled by issuing a soft reset to the host adapter and re-initialization.
169 Finally, if tagged queuing is active and more than one command reset occurs
174 lock up or crash, and thereby allowing a clean shutdown and restart after the
180 driver will interrogate the PCI configuration space and use the I/O port
190 data transfer and error recovery statistics are available through the
256 BusLogic SCSI Host Adapters are available packaged both as bare boards and as
259 list. The retail kit includes the bare board and manual as well as cabling and
260 driver media and documentation that are not provided with bare boards.
268 RAID. RAIDPlus is not supported on Linux, and there are no plans to support
269 it. The MD driver in Linux 2.0 provides for concatenation (LINEAR) and
270 striping (RAID-0), and support for mirroring (RAID-1), fixed parity (RAID-4),
271 and distributed parity (RAID-5) is available separately. The built-in Linux
272 RAID support is generally more flexible and is expected to perform better
279 Default" settings that are conservative and do not allow for UltraSCSI speed
308 Ctrl-B at system startup and select "Adapter Configuration", "View/Modify
309 Configuration", and then change the "ISA Compatible Port" setting from
320 correctly, it is necessary that the host adapter's BIOS and the kernel agree
325 increasing bus number and device number, while others do so in the opposite
329 PCI slots in order of increasing bus number and device number regardless of
330 the PCI BIOS enumeration, and requires that their scheme be supported by the
333 by increasing bus number and device number. To disable this feature, invoke
334 the AutoSCSI utility via Ctrl-B at system startup and select "Adapter
335 Configuration", "View/Modify Configuration", press Ctrl-F10, and then change
345 settings that are conservative and do not allow for UltraSCSI speed to be
363 separated by commas. The Probing and Debugging Options apply to all host
374 will be probed (0x330, 0x334, 0x230, 0x234, 0x130, and 0x134). Multiple
380 The "NoProbe" option disables all probing and therefore no BusLogic Host
386 Addresses and therefore only PCI MultiMaster and FlashPoint Host Adapters
392 Space and therefore only ISA Multimaster Host Adapters will be detected, as
405 before FlashPoint Host Adapters. By default, if both FlashPoint and PCI
417 the Queue Depth and whether Tagged Queuing is permitted for each Target
432 on the Host Adapter's Total Queue Depth and the number, type, speed, and
451 based on the firmware version of the BusLogic Host Adapter and based on
469 sequence of "Y", "N", and "X" characters. "Y" enables Tagged Queuing, "N"
470 disables Tagged Queuing, and "X" accepts the default based on the firmware
472 Target Device 1, and so on; if the sequence of "Y", "N", and "X" characters
482 Adapter Hard Reset which initiates a SCSI Bus Reset and issuing any SCSI
511 error from the Target Device. The CDB and Sense Data will be printed for
519 1 and 2 on the first host adapter to 7 and 15, the Queue Depth for all Target
520 Devices on the second host adapter to 31, and the Bus Settle Time on the
551 patch -p0 < BusLogic.patch (only for 2.0.33 and below)
557 appropriate, and reboot.
563 users of new driver releases and other announcements regarding Linux support