From owner-freebsd-wireless@FreeBSD.ORG Thu Aug 23 00:37:46 2012 Return-Path: Delivered-To: freebsd-wireless@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 75EA51065689 for ; Thu, 23 Aug 2012 00:37:46 +0000 (UTC) (envelope-from adrian.chadd@gmail.com) Received: from mail-pz0-f54.google.com (mail-pz0-f54.google.com [209.85.210.54]) by mx1.freebsd.org (Postfix) with ESMTP id 43C198FC1D for ; Thu, 23 Aug 2012 00:37:46 +0000 (UTC) Received: by dadr6 with SMTP id r6so111035dad.13 for ; Wed, 22 Aug 2012 17:37:45 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:cc:content-type; bh=UJ97X/irytYw9/zPeWxfcYKT5T8uDcP+XP1gSYI6GXU=; b=VtjouXiIQSJCZFnzWxFaKaR9FyFMQ5WObx03cTCuAQRUg9uKsUjQ944ytMRl8hGH5H DXUNqfdTvgxGEXcAqbBu0xKNrsB8MHYDzwfj2LmlFTNxxYHoDITpmDuLsPKLx6+cNjXP 4GufF8DFed5JtgrMXUFEDhFs2f7vDrdqVTA+DSJuGPC7FxkATGiaMtB0X853ELtlga6T 5nZ/HkSgSVWMHSMoh/J5gaqImUw3H8X+YLUZcbLGvAgNM/Y/7lJlAkhjIB4GqrxQIkZX MTKhDUPX8HXkOz5qPPzYp/N4ovhT46RKhZOxI5VI2S7XkmKqp+qbUBUf7fHOj/LsZtg9 ScQw== MIME-Version: 1.0 Received: by 10.68.192.40 with SMTP id hd8mr106395pbc.125.1345682265570; Wed, 22 Aug 2012 17:37:45 -0700 (PDT) Sender: adrian.chadd@gmail.com Received: by 10.68.36.106 with HTTP; Wed, 22 Aug 2012 17:37:45 -0700 (PDT) In-Reply-To: References: <475A4E02EFF4724A9E58F55A56AC13160641D618@APEVS1.ap.ci.root> <475A4E02EFF4724A9E58F55A56AC13160661E6AC@APEVS1.ap.ci.root> Date: Wed, 22 Aug 2012 17:37:45 -0700 X-Google-Sender-Auth: DPLjwRfyq19borZICL8fzwbhvwY Message-ID: From: Adrian Chadd To: "Wright, Brett" Content-Type: text/plain; charset=ISO-8859-1 Cc: freebsd-wireless@freebsd.org, Kim Culhan Subject: Re: Atheros DFS radar detection X-BeenThere: freebsd-wireless@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "Discussions of 802.11 stack, tools device driver development." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 23 Aug 2012 00:37:46 -0000 hi, would you mind filing a couple of PRs, just so I remember to get this stuff done: * please add a HAL method to fetch the default radar parameters; * please modify the AR5212 HAL to disable some of the fast diversity stuff if radar is enabled; * please modify dfs_null to fetch the default radar parameters and disable the appropriate fast diversity stuff; * please modify the AR5212 HAL to disable 5GHz ANI operation if radar reporting is enabled. I've whacked an AR5212 reference cardbus NIC into a laptop and added the AR5212 parameters to dfs_null.c. I get around 40 false detects a second when doing around 25mbit/sec TCP iperf test. So there may be something specific about your NIC(s) and antenna setup. I'll try to setup some other 11a NICs (AR5213, AR5312, AR5413, etc) and see what the story is. I know the AR5212 parameters I have are working, but I also know the AR5413 Adrian