From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Sun, 25 Aug 2002 22:33:59 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Sun, 25 Aug 2002 22:33:59 -0400 Received: from mta03bw.bigpond.com ([139.134.6.86]:20186 "EHLO mta03bw.bigpond.com") by vger.kernel.org with ESMTP id convert rfc822-to-8bit; Sun, 25 Aug 2002 22:33:58 -0400 Content-Type: text/plain; charset=US-ASCII From: Iain To: linux-kernel@vger.kernel.org Subject: Promise 20267 in DMA mode? Date: Mon, 26 Aug 2002 12:31:22 +1000 User-Agent: KMail/1.4.2 MIME-Version: 1.0 Content-Transfer-Encoding: 7BIT Message-Id: <200208251437.19398.iain@myspinach.org> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hi, How do I enable DMA for my Promise 20267 raid controller? I'm using kernel 2.4.18 with relevant config details: CONFIG_BLK_DEV_PDC202XX=y CONFIG_PDC202XX_BURST=y # CONFIG_PDC202XX_FORCE is not set CONFIG_BLK_DEV_ATARAID_PDC=y cat /proc/ide/pdc202xx gives: PDC20267 Chipset. ------------------------------- General Status --------------------------------- Burst Mode : enabled Host Mode : Normal Bus Clocking : 66 External IO pad select : 10 mA Status Polling Period : 0 Interrupt Check Status Polling Delay : 0 --------------- Primary Channel ---------------- Secondary Channel ------------- enabled enabled 66 Clocking disabled disabled Mode MASTER Mode MASTER FIFO Empty FIFO Empty --------------- drive0 --------- drive1 -------- drive0 ---------- drive1 ------ DMA enabled: no no no no DMA Mode: UDMA 4 NOTSET UDMA 4 NOTSET PIO Mode: PIO ? NOTSET PIO ? NOTSET If I try hdparm -d1 /dev/hde it gives: /dev/hde: setting using_dma to 1 (on) HDIO_SET_DMA failed: Operation not permitted using_dma = 0 (off) Please CC replies to me. thanks, Iain. -- PGP info: http://www.myspinach.org/~iain/pgpinfo.html