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ahd (4)
  • >> ahd (4) ( FreeBSD man: Специальные файлы /dev/* )

  • BSD mandoc
     

    NAME

    
    
    ahd
    
     - Adaptec PCI/PCI-X Ultra320 SCSI host adapter driver
    
     
    

    SYNOPSIS

    To compile this driver into the kernel, place the following lines in your kernel configuration file:
    device pci device scbus device ahd

    To compile in debugging code: options AHD_DEBUG options AHD_DEBUG_OPTS=<bitmask of options> options AHD_REG_PRETTY_PRINT

    To configure one or more controllers to assume the target role: options AHD_TMODE_ENABLE=<bitmask of units>

    Alternatively, to load the driver as a module at boot time, place the following line in loader.conf5:

    ahd_load="YES"
    
     

    DESCRIPTION

    This driver provides access to the SCSI bus(es) connected to Adaptec AIC79xx host adapter chips.

    Driver features include support for narrow and wide busses, fast, ultra, ultra2, ultra160, and ultra320 synchronous transfers, packetized transfers, tagged queueing, 512 SCB's, and target mode.

    The AHD_DEBUG_OPTS option is used to control which diagnostic messages are printed to the console when AHD_DEBUG is enabled. Logically OR the following bits together:

    Value Function 0x0001       Show miscellaneous information
    0x0002  Show sense data
    0x0004  Show Serial EEPROM contents
    0x0008  Show bus termination settings
    0x0010  Show host memory usage
    0x0020  Show SCSI protocol messages
    0x0040  Show mode pointer of the chip register window
    0x0080  Show selection timeouts
    0x0100  Show FIFO usage messages
    0x0200  Show Queue Full status
    0x0400  Show SCB queue status
    0x0800  Show inbound packet information
    0x1000  Show S/G list information
    0x2000  Enable extra diagnostic code in the firmware

    The AHD_REG_PRETTY_PRINT option compiles in support for human-readable bit definitions for each register that is printed by the debugging code. However, it also bloats the compiled size of the driver by approximately 215KB.

    Individual controllers may be configured to operate in the target role through the AHD_TMODE_ENABLE configuration option. The value assigned to this option should be a bitmap of all units where target mode is desired. For example, a value of 0x25 would enable target mode on units 0, 2, and 5. Note that target mode is only supported for ultra160 speeds and below.

    Per target configuration performed in the SCSI-Select menu, accessible at boot, is honored by this driver. This includes synchronous/asynchronous transfers, maximum synchronous negotiation rate, wide transfers, disconnection, and the host adapter's SCSI ID.  

    HARDWARE

    The driver supports the following:

     

    SEE ALSO

    ahc(4), cd(4), da(4), sa(4), scsi(4)  

    HISTORY

    The driver first appeared in Fx 4.7 .  

    AUTHORS

    The driver, the AIC7xxx sequencer-code assembler, and the firmware running on the aic79xx chips was written by An Justin T. Gibbs . This manual page is based on the ahc(4) manual page.  

    BUGS

    The current generation of 79xx chips do not support target mode in Ultra320 mode. Target mode in general has not been well tested in this driver.


     

    Index

    NAME
    SYNOPSIS
    DESCRIPTION
    HARDWARE
    SEE ALSO
    HISTORY
    AUTHORS
    BUGS


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