From owner-freebsd-hackers@freebsd.org Sat Mar 25 01:30:59 2017 Return-Path: Delivered-To: freebsd-hackers@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 7E95DD1C81C for ; Sat, 25 Mar 2017 01:30:59 +0000 (UTC) (envelope-from cse.cem@gmail.com) Received: from mail-wm0-f50.google.com (mail-wm0-f50.google.com [74.125.82.50]) (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 1D9D6156C for ; Sat, 25 Mar 2017 01:30:58 +0000 (UTC) (envelope-from cse.cem@gmail.com) Received: by mail-wm0-f50.google.com with SMTP id n11so24726255wma.1 for ; Fri, 24 Mar 2017 18:30:58 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:reply-to:in-reply-to:references :from:date:message-id:subject:to:cc:content-transfer-encoding; bh=D1coHJyxAmm9kxRGK1BlkFZdpqN65G02xP6GxYEW0cU=; b=C9duv9G0/NcDpvezP3QXq1VqbNmvr7XMpPBeji1NA25aKjgUNxai3OaJ8IJ3sbeZtc M1lmT7Ibc5RQKqtHL2wPz+2rSuNbDLNrDV9anESh/lu2WTPMPSgC1yuha+A8gqZUf7/g P5Qos5yxhtFlsngas4A3NDDYt7wauYeCab91/NBIGbrAIFEXX/HO6JXKZIpIR0Ni/rtV 7HAb/VRbZkeuveah4kTBldFb0nK4pFIA6UZhZ/5qr8yx+5svo8xsAbLw08vA+M9D+zVb Np2FWgpPKnSk2nbGKdP+fd+/AHNohrVXWCxBIyUYUrJfSFGFTAzHhUNxhiwelkGe/V3z 0leQ== X-Gm-Message-State: AFeK/H3IkahF3EhMZ6Gtmqo/ZpDx9VTrMbBGbfjjkWKq5sHDb9YW43Tp8J0pXYgF+R102g== X-Received: by 10.28.130.139 with SMTP id e133mr20594wmd.133.1490403559246; Fri, 24 Mar 2017 17:59:19 -0700 (PDT) Received: from mail-wr0-f175.google.com (mail-wr0-f175.google.com. [209.85.128.175]) by smtp.gmail.com with ESMTPSA id k139sm4464094wmg.11.2017.03.24.17.59.19 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 24 Mar 2017 17:59:19 -0700 (PDT) Received: by mail-wr0-f175.google.com with SMTP id u1so3137067wra.2 for ; Fri, 24 Mar 2017 17:59:19 -0700 (PDT) X-Received: by 10.223.160.243 with SMTP id n48mr11113636wrn.198.1490403558925; Fri, 24 Mar 2017 17:59:18 -0700 (PDT) MIME-Version: 1.0 Reply-To: cem@freebsd.org Received: by 10.80.169.4 with HTTP; Fri, 24 Mar 2017 17:59:18 -0700 (PDT) In-Reply-To: <21FF81F3-D290-4682-AB88-5769C52499C3@chrisbowman.com> References: <21FF81F3-D290-4682-AB88-5769C52499C3@chrisbowman.com> From: Conrad Meyer Date: Fri, 24 Mar 2017 17:59:18 -0700 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: large PCIe BARs To: Christopher Bowman Cc: "freebsd-hackers@freebsd.org" Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 25 Mar 2017 01:30:59 -0000 Hi Christopher, Yeah, FreeBSD can easily map BARs that large. I've personally mapped a 512GB BAR, although I don't recommend it. We regularly use 32GB BARs. This might just be a driver bug. Best, Conrad On Fri, Mar 24, 2017 at 5:38 PM, Christopher Bowman w= rote: > I have an FPGA PCIe device and driver I designing. I think my driver is = trying to map the PCIe address space for one of the BARs and it=E2=80=99s f= ailing. My guess is that it=E2=80=99s failing due to the size. The board = has 2G of onboard memory that I=E2=80=99d like to present as one large BAR.= Does FreeBSD (11.0 release) allow for mapping PCIe resources that larger?= If not is there a limit? If so any one have any comments? > Thanks, > Christopher > > sp6050: probing for SP605 > sp6050: at device 0.0 on pci3 > sp6050: attach of SP605 > sp6050: 0x40000000 bytes of rid 0x10 res 3 failed (0, 0xffffffffffffffff)= . > sp6050: Could not map memory > device_attach: sp6050 attach returned 6 > > _______________________________________________ > freebsd-hackers@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-hackers > To unsubscribe, send any mail to "freebsd-hackers-unsubscribe@freebsd.org= "