MFC, r310338:

MFC, r310338:
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  r310338 | ken | 2016-12-20 14:17:07 -0700 (Tue, 20 Dec 2016) | 37 lines

  Turn on FC-Tape by default in the isp(4) driver.

  FC-Tape provides additional link level error recovery, and is
  highly recommended for tape devices.  It will only be turned on for
  a given target if the target supports it.

  Without this setting, we default to whatever FC-Tape setting is in
  NVRAM on the card.

  This can be overridden by setting the following loader tunable, for
  example for isp0:

  hint.isp.0.nofctape=1

  sys/conf/options:
  	Add a new kernel config option, ISP_FCTAPE_OFF, that
  	defaults the FC-Tape configuration to off.

  sys/dev/isp/isp_pci.c:
  	If ISP_FCTAPE_OFF is defined, turn off FC-Tape.  Otherwise,
  	turn it on if the card supports it.

  share/man/man4/isp.4:
  	Add a description of FC-Tape to the isp(4) man page.

  	Add descriptions of the fctape and nofctape options, as well as the
  	ISP_FCTAPE_OFF kernel configuration option.

  	Add the ispfw module and kernel drivers to the suggested
  	configurations at the top of the man page so that users are less
  	likely to leave it out.  The driver works well with the included
  	firmware, but may not work at all with whatever firmware the user
  	has flashed on their card.

  Sponsored by:	Spectra Logic

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Sponsored by:	Spectra Logic

git-svn-id: svn://svn.freebsd.org/base/stable/10@310484 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f