From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932271AbWCDRfI (ORCPT ); Sat, 4 Mar 2006 12:35:08 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932269AbWCDRfI (ORCPT ); Sat, 4 Mar 2006 12:35:08 -0500 Received: from havoc.gtf.org ([69.61.125.42]:53644 "EHLO havoc.gtf.org") by vger.kernel.org with ESMTP id S932243AbWCDRfG (ORCPT ); Sat, 4 Mar 2006 12:35:06 -0500 Date: Sat, 4 Mar 2006 12:35:05 -0500 From: Jeff Garzik To: linux-ide@vger.kernel.org Cc: linux-kernel@vger.kernel.org Subject: [PATCH] AHCI prefetch Message-ID: <20060304173505.GA28643@havoc.gtf.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.4.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org This patch has been sitting in my tmp directory for ages. We should probably turn this on, though the practical difference is probably minimal. diff --git a/drivers/scsi/ahci.c b/drivers/scsi/ahci.c index 4e96ec5..973a794 100644 --- a/drivers/scsi/ahci.c +++ b/drivers/scsi/ahci.c @@ -64,8 +64,10 @@ enum { AHCI_PORT_PRIV_DMA_SZ = AHCI_CMD_SLOT_SZ + AHCI_CMD_TBL_SZ + AHCI_RX_FIS_SZ, AHCI_IRQ_ON_SG = (1 << 31), + AHCI_CMD_ATAPI = (1 << 5), AHCI_CMD_WRITE = (1 << 6), + AHCI_CMD_PREFETCH = (1 << 7), RX_FIS_D2H_REG = 0x40, /* offset of D2H Register FIS data */ @@ -533,7 +535,7 @@ static void ahci_qc_prep(struct ata_queu if (qc->tf.flags & ATA_TFLAG_WRITE) opts |= AHCI_CMD_WRITE; if (is_atapi_taskfile(&qc->tf)) - opts |= AHCI_CMD_ATAPI; + opts |= AHCI_CMD_ATAPI | AHCI_CMD_PREFETCH; pp->cmd_slot[0].opts = cpu_to_le32(opts); pp->cmd_slot[0].status = 0;