From owner-freebsd-fs@freebsd.org  Fri Mar  4 00:51:10 2016
Return-Path: <owner-freebsd-fs@freebsd.org>
Delivered-To: freebsd-fs@mailman.ysv.freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org
 [IPv6:2001:1900:2254:206a::19:1])
 by mailman.ysv.freebsd.org (Postfix) with ESMTP id 2E57AA94C93
 for <freebsd-fs@mailman.ysv.freebsd.org>; Fri,  4 Mar 2016 00:51:10 +0000 (UTC)
 (envelope-from zbeeble@gmail.com)
Received: from mail-yk0-x231.google.com (mail-yk0-x231.google.com
 [IPv6:2607:f8b0:4002:c07::231])
 (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits))
 (Client CN "smtp.gmail.com",
 Issuer "Google Internet Authority G2" (verified OK))
 by mx1.freebsd.org (Postfix) with ESMTPS id E50C2B1D
 for <freebsd-fs@freebsd.org>; Fri,  4 Mar 2016 00:51:09 +0000 (UTC)
 (envelope-from zbeeble@gmail.com)
Received: by mail-yk0-x231.google.com with SMTP id v186so16929296yke.2
 for <freebsd-fs@freebsd.org>; Thu, 03 Mar 2016 16:51:09 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113;
 h=mime-version:date:message-id:subject:from:to;
 bh=gnHPHUHFlMX2+jaMsGYByrdfCProdfOWJ/lO1tkmWnI=;
 b=ZvOhxISDfYnLOjcj0hplzYA6Oa0v3luVIn7VWfmxeKx+gZ5NREfQAbNSHHqhu5GPW+
 AZuFRWADvMNT6MBpaMJhaLkRgxX6e+HfytPk2ulB5GjSOZ7aq2yod1hPy7Ivs+w+N5Zb
 yMXuCkpx1dFOz05ossl9RqSul9ohWxkd1hME9oFO5Ug4samw7xQxjptyFNegoXlmqjid
 +SzMSdPpVOq2Mq09TbcTSsc+URYooaPSg3kuFFXLEmnUwwGhfzH1aG6DRhhG3wtVPAvY
 BsUsAbVd7vEY5siURBnYAh0jyYoXtrwpEjclkTC0IPei8LWjH7zQg3IxJOlkQi+pEJI0
 /Cnw==
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
 d=1e100.net; s=20130820;
 h=x-gm-message-state:mime-version:date:message-id:subject:from:to;
 bh=gnHPHUHFlMX2+jaMsGYByrdfCProdfOWJ/lO1tkmWnI=;
 b=l8jFSbEESfdpVB50+A49PxXzj8Gdz7rbIcYw+VM+GgmhnP1g19uHoV3O2wxlzribbt
 Ta1qEg/9b5p+69UAZez1ELsqLvoz1foqL8O8PL9m0NjGuc3HionO/ekN7v73DnJ8hSdn
 3c6sKZmVhbJSkIqE1j/HFIB3QPGgz7oEpLYf8eBsBg3ulSlh0UW0K3cSWTEulh04Z8DI
 nhEtlrEIbgiYeVyE+ftmsmbYfNn/zTr/S82Ynfzaw+5mYnVQt2nRrHl+zHcSlhFREDir
 bxOfoTeXt3KasIyScfPST1qubV+BFCvRMP/RxqBBon7tePivRLgdEao2EMBIsKYzu+to
 sxPw==
X-Gm-Message-State: AD7BkJI8hrgAR9gpr5R0XIoX0lb6HQps4W/LGDOX3e+Bq2cWITrVODMfvakMKcnXk7/2tY1HNRDLPembln1r1A==
MIME-Version: 1.0
X-Received: by 10.37.47.76 with SMTP id v73mr3174764ybv.42.1457052669069; Thu,
 03 Mar 2016 16:51:09 -0800 (PST)
Received: by 10.37.27.130 with HTTP; Thu, 3 Mar 2016 16:51:09 -0800 (PST)
Date: Thu, 3 Mar 2016 19:51:09 -0500
Message-ID: <CACpH0MdTnED2DbTxBBrsGNJ7ZUdbN=7cY2XGKSRjRBn1gnZPJQ@mail.gmail.com>
Subject: hw.mfi.allow_cam_disk_passthrough missing?
From: Zaphod Beeblebrox <zbeeble@gmail.com>
To: freebsd-fs <freebsd-fs@freebsd.org>
Content-Type: text/plain; charset=UTF-8
X-Content-Filtered-By: Mailman/MimeDel 2.1.21
X-BeenThere: freebsd-fs@freebsd.org
X-Mailman-Version: 2.1.21
Precedence: list
List-Id: Filesystems <freebsd-fs.freebsd.org>
List-Unsubscribe: <https://lists.freebsd.org/mailman/options/freebsd-fs>,
 <mailto:freebsd-fs-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-fs/>
List-Post: <mailto:freebsd-fs@freebsd.org>
List-Help: <mailto:freebsd-fs-request@freebsd.org?subject=help>
List-Subscribe: <https://lists.freebsd.org/mailman/listinfo/freebsd-fs>,
 <mailto:freebsd-fs-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 04 Mar 2016 00:51:10 -0000

so... I see in my source (10.2-STABLE):

static int mfi_allow_disks = 0;
TUNABLE_INT("hw.mfi.allow_cam_disk_passthrough", &mfi_allow_disks);
SYSCTL_INT(_hw_mfi, OID_AUTO, allow_cam_disk_passthrough, CTLFLAG_RD,
    &mfi_allow_disks, 0, "event message locale");

... sysctl hw.mfi.allow_cam_disk_passthrough:

[1:6:306]root@virtual:~> sysctl hw.mfi.allow_cam_disk_passthrough
sysctl: unknown oid 'hw.mfi.allow_cam_disk_passthrough': No such file or
directory

even though this is a generic kernel that contains mfi and the card in
question probes up just fine.

What gives?