參數(shù)資料
型號(hào): LSI53C895
英文描述: LSI53C895 PCI to Ultra2 SCSI I/O Processor with LVD Link Universal Transceivers technical manual v3.2 12/00
中文描述: LSI53C895 PCI到Ultra2的SCSI I / O處理器與內(nèi)徑鏈接通用收發(fā)器技術(shù)手冊(cè)v3.2版12/00
文件頁數(shù): 92/166頁
文件大?。?/td> 1330K
代理商: LSI53C895
3-44
SAF-TE Source Code
Figure 3.3
Flow Diagram of Command_and_Data_Phases
()
command_and_data_phases()
Check SCSI OpCode
Error on SCSI OpCode
Set Check Condition
Transfer CDB to External Data Memory
Error on SCSI Transfer
Return TRUE
Read SCSI Status Register
Parity Error
Compute byte_count
If INQUIRY command
Call
do_inquiry
Send INQUIRY data if valid CDB,
else set check condition.
Return FALSE
If REQUEST SENSE command
Call
do_request_sense
Send (and then clear) Sense data if
valid CDB, else set check condition.
If host at UNIT ATTENTION
state
Set sense data and send check
condition.
Clear Sense Keys
Call
invalid_LUN_test
Invalid LUN
Set Check Condition
If Illegal OpCode
Based on OpCode, call:
do_read_buffer
do_write_buffer
do_test_unit_ready
do_send_diagnostic
Return:
TRUE - SCSI transfer error.
FALSE and no check condition - Successful
FALSE and check condition - Command not processed due
to illegal command.
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