*** UNIX MANUAL PAGE BROWSER ***

AHD(4) FreeBSD Kernel Interfaces Manual AHD(4) NAME ahd - Adaptec PCI/PCI-X AIC79xx-based Ultra320 SCSI interface SYNOPSIS ahd* at pci? DESCRIPTION ahd provides access to the SCSI bus(es) connected to Adaptec AIC79xx host adapter chips. ahd supports narrow and wide buses; synchronous and asynchronous operation; fast, ultra, ultra2, ultra160, and ultra320 (packetized) transfers; tagged queuing and 512 SCBs. ahd does not support target mode operation. The ahd driver supports the following: o Adaptec AIC7901 host adapter chip o Adaptec AIC7901A host adapter chip o Adaptec AIC7902 host adapter chip o Adaptec 29320 host adapter o Adaptec 39320 host adapter o Many motherboards with on-board SCSI support To compile in debugging code: option AHD_DEBUG option AHD_DEBUG_OPTS=<bitmask of options> 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 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 adapters SCSI ID. SEE ALSO ahc(4), cd(4), ch(4), intro(4), pci(4), scsi(4), sd(4), st(4), uk(4) HISTORY The ahd driver was ported from FreeBSD 4.7 and first appeared in OpenBSD 3.6. AUTHORS The ahd driver, the AIC7xxx sequencer-code assembler, and the firmware running on the aic79xx chips was written by Justin T. Gibbs. OpenBSD port by Milos Urbanek, Kenneth R. Westerback & Marco Peereboom. FreeBSD 14.1-RELEASE-p8 August 14, 2012 FreeBSD 14.1-RELEASE-p8