From owner-freebsd-hackers Sat Sep 15 12:48:21 2001 Delivered-To: freebsd-hackers@freebsd.org Received: from revolt.poohsticks.org (revolt.poohsticks.org [63.227.60.74]) by hub.freebsd.org (Postfix) with ESMTP id 9075437B405 for ; Sat, 15 Sep 2001 12:48:19 -0700 (PDT) Received: from revolt.poohsticks.org (localhost [127.0.0.1]) by revolt.poohsticks.org (8.11.3/8.11.3) with ESMTP id f8FJmIs88068 for ; Sat, 15 Sep 2001 13:48:18 -0600 (MDT) (envelope-from drew@revolt.poohsticks.org) Message-Id: <200109151948.f8FJmIs88068@revolt.poohsticks.org> To: hackers@FreeBSD.ORG Subject: Re: Driver structures & alignment In-reply-to: Your message of "Sat, 15 Sep 2001 12:26:15 PDT." <20010915122615.A72222@dragon.nuxi.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-ID: <88065.1000583297.1@revolt.poohsticks.org> Date: Sat, 15 Sep 2001 13:48:18 -0600 From: Drew Eckhardt Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG In message <20010915122615.A72222@dragon.nuxi.com>, dev-null@NUXI.com writes: >On Sat, Sep 15, 2001 at 12:13:58PM -0600, Warner Losh wrote: >> unfortunately, there are many device structures that are passed around >> via DMA and hte like that don't let you do this... > >How come? The struct represents some [semi-]physical organization? Other hardware uses the data directly (say scatter/gathre lists for a SCSI host adapter or ethernet board) and you can't (or don't want to) change the firmware on the device. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message