From owner-freebsd-arm@freebsd.org Sun Apr 2 00:00:13 2017 Return-Path: Delivered-To: freebsd-arm@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 D1501D2A63C for ; Sun, 2 Apr 2017 00:00:13 +0000 (UTC) (envelope-from adrian.chadd@gmail.com) Received: from mail-wr0-x233.google.com (mail-wr0-x233.google.com [IPv6:2a00:1450:400c:c0c::233]) (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 68984392 for ; Sun, 2 Apr 2017 00:00:13 +0000 (UTC) (envelope-from adrian.chadd@gmail.com) Received: by mail-wr0-x233.google.com with SMTP id w43so127033512wrb.0 for ; Sat, 01 Apr 2017 17:00:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc; bh=VIPTLAUbo7WkWsKTb2BkEERmlCIm/Bwi/NfifqPYlkw=; b=DhI/wyQCwWnsLxN1RcRw1Zqp1CVLutxmkYReojmCOPcqbJWeRCaYnnDIfGYhMPhTAV 91SartSSRClMqKcOhNHEtkT7m/b37vTKtoKD0DJ2PzX6mZaNr6/nU1PIWLOwK6FEAm1Q XcBp2zA+6eDk2uOdogvL11QdTgcQFxJCvXZ8QudmwmMBtBLy87iCCFAsfaH3h+kLHtG7 zB09j6dFZ/ASVambsvs3Hl/xLQSBe+PC9unnTzd1fg6Z/3rQYuRZkf6wJU8STGZ0f6hW Bqz5i42D1+Xbn7aMbO7si+LDOK/sz5s7Om3ZQP/hcA+YHFokcCFKDis/ZFK24XBiaxfB 3OaA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc; bh=VIPTLAUbo7WkWsKTb2BkEERmlCIm/Bwi/NfifqPYlkw=; b=b93xSsNu2Amv1SewiKDafGc2vyzi3BHmY9QG62NPhOo1uQg+De2A604s74KDv1YE6D 9DJLd50pqUwemdq0bpybbV/DnhQJzAnHrkUHBiqGRqkDe29Mb+wufcFaA/IwhzkmjBFa xWvldLZB2PNr4ZJOyAiamQzR9nFbXe3lqXfMauLMD9AItam9tmyFnSg/yi8vhkxXMjPj ZiRnvuDvzgJZjHFdh5bBINfLxeOjOtbNG5NxNn4yMeqbcbsW6smlPx6Ds3TChA/Zib95 +NJWExs2U1Ib2s+RHBLRnft1zoIiujBfrGkL3zphVXG1B8fZGOisnMfc5cPgLvR2+6Sv n1ng== X-Gm-Message-State: AFeK/H3AQ3/JdEUjCAGwpi/PxWU1qZu03EA4L7i7D149AXmYfaaaO7abRM5Q6dHyEmjUtvWUh2CKrcWo69p46g== X-Received: by 10.223.180.69 with SMTP id v5mr9611559wrd.62.1491091211295; Sat, 01 Apr 2017 17:00:11 -0700 (PDT) MIME-Version: 1.0 Received: by 10.28.128.133 with HTTP; Sat, 1 Apr 2017 17:00:10 -0700 (PDT) In-Reply-To: References: From: Adrian Chadd Date: Sat, 1 Apr 2017 17:00:10 -0700 Message-ID: Subject: Re: Coherent bus_dma for ARMv7 To: Marcin Wojtas Cc: "freebsd-arm@freebsd.org" Content-Type: text/plain; charset=UTF-8 X-BeenThere: freebsd-arm@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: "Porting FreeBSD to ARM processors." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 02 Apr 2017 00:00:13 -0000 hiya, so why's this need to be different? can't it somehow be merged with the existing busdma code? -adrian On 31 March 2017 at 07:05, Marcin Wojtas wrote: > Patch with the coherent bus_dma support attached. > > Marcin > > 2017-03-31 16:01 GMT+02:00 Marcin Wojtas : >> Hi, >> >> In current FreeBSD-HEAD ARMv7 platforms, which support hardware IO >> cache coherency cannot make use of this feature. In our project we >> implemented coherent variant bus_dma, which is basing on x86 and arm64 >> approach. Using of above solution is not obligatory and depends on >> setting newly added option for that purpose. >> >> Needless to say, our platform (Marvell Armada 38x) IO performance >> boosted after switching to it. Do you wish to enable such option in >> HEAD? >> >> Regards, >> Marcin > > _______________________________________________ > freebsd-arm@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-arm > To unsubscribe, send any mail to "freebsd-arm-unsubscribe@freebsd.org"