1# 2# AIC79XX 2.5.X Kernel configuration File. 3# $Id: //depot/linux-aic79xx-2.5.0/drivers/scsi/aic7xxx/Kconfig.aic79xx#4 $ 4# 5config SCSI_AIC79XX 6 tristate "Adaptec AIC79xx U320 support" 7 depends on PCI && SCSI 8 select SCSI_SPI_ATTRS 9 help 10 This driver supports all of Adaptec's Ultra 320 PCI-X 11 based SCSI controllers. 12 13config AIC79XX_CMDS_PER_DEVICE 14 int "Maximum number of TCQ commands per device" 15 depends on SCSI_AIC79XX 16 default "32" 17 ---help--- 18 Specify the number of commands you would like to allocate per SCSI 19 device when Tagged Command Queueing (TCQ) is enabled on that device. 20 21 This is an upper bound value for the number of tagged transactions 22 to be used for any device. The aic7xxx driver will automatically 23 vary this number based on device behavior. For devices with a 24 fixed maximum, the driver will eventually lock to this maximum 25 and display a console message inidicating this value. 26 27 Due to resource allocation issues in the Linux SCSI mid-layer, using 28 a high number of commands per device may result in memory allocation 29 failures when many devices are attached to the system. For this reason, 30 the default is set to 32. Higher values may result in higer performance 31 on some devices. The upper bound is 253. 0 disables tagged queueing. 32 33 Per device tag depth can be controlled via the kernel command line 34 "tag_info" option. See drivers/scsi/aic7xxx/README.aic79xx 35 for details. 36 37config AIC79XX_RESET_DELAY_MS 38 int "Initial bus reset delay in milli-seconds" 39 depends on SCSI_AIC79XX 40 default "5000" 41 ---help--- 42 The number of milliseconds to delay after an initial bus reset. 43 The bus settle delay following all error recovery actions is 44 dictated by the SCSI layer and is not affected by this value. 45 46 Default: 5000 (5 seconds) 47 48config AIC79XX_BUILD_FIRMWARE 49 bool "Build Adapter Firmware with Kernel Build" 50 depends on SCSI_AIC79XX && !PREVENT_FIRMWARE_BUILD 51 help 52 This option should only be enabled if you are modifying the firmware 53 source to the aic79xx driver and wish to have the generated firmware 54 include files updated during a normal kernel build. The assembler 55 for the firmware requires lex and yacc or their equivalents, as well 56 as the db v1 library. You may have to install additional packages 57 or modify the assembler Makefile or the files it includes if your 58 build environment is different than that of the author. 59 60config AIC79XX_ENABLE_RD_STRM 61 bool "Enable Read Streaming for All Targets" 62 depends on SCSI_AIC79XX 63 default n 64 help 65 Read Streaming is a U320 protocol option that should enhance 66 performance. Early U320 drive firmware actually performs slower 67 with read streaming enabled so it is disabled by default. Read 68 Streaming can be configured in much the same way as tagged queueing 69 using the "rd_strm" command line option. See 70 drivers/scsi/aic7xxx/README.aic79xx for details. 71 72config AIC79XX_DEBUG_ENABLE 73 bool "Compile in Debugging Code" 74 depends on SCSI_AIC79XX 75 default y 76 help 77 Compile in aic79xx debugging code that can be useful in diagnosing 78 driver errors. 79 80config AIC79XX_DEBUG_MASK 81 int "Debug code enable mask (16383 for all debugging)" 82 depends on SCSI_AIC79XX 83 default "0" 84 help 85 Bit mask of debug options that is only valid if the 86 CONFIG_AIC79XX_DEBUG_ENBLE option is enabled. The bits in this mask 87 are defined in the drivers/scsi/aic7xxx/aic79xx.h - search for the 88 variable ahd_debug in that file to find them. 89 90config AIC79XX_REG_PRETTY_PRINT 91 bool "Decode registers during diagnostics" 92 depends on SCSI_AIC79XX 93 default y 94 help 95 Compile in register value tables for the output of expanded register 96 contents in diagnostics. This make it much easier to understand debug 97 output without having to refer to a data book and/or the aic7xxx.reg 98 file. 99