From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jeremy Higdon Subject: [RFC PATCH 2.6.9-rc2] Add sysfs queue depth override to qla2xxx Date: Sun, 26 Sep 2004 23:10:03 -0700 Sender: linux-scsi-owner@vger.kernel.org Message-ID: <20040927061003.GA182890@sgi.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from omx3-ext.sgi.com ([192.48.171.20]:61598 "EHLO omx3.sgi.com") by vger.kernel.org with ESMTP id S266169AbUI0GSh (ORCPT ); Mon, 27 Sep 2004 02:18:37 -0400 Content-Disposition: inline List-Id: linux-scsi@vger.kernel.org To: linux-scsi@vger.kernel.org Cc: andrew.vasquez@qlogic.com, James.Bottomley@steeleye.com This patch is to QLA2xxx version 8.00.00b15-k, and it allows users to override the default driver queue depth for a target by making the queue_depth sysfs attribute writeable. I based this on the code in the 53c700 driver. Andrew, please apply if it looks correct to you and James. Let me know if you'd like me to regenerate against a different qla2xxx version. thanks Jeremy ===== drivers/scsi/qla2xxx/qla_os.c 1.41 vs edited ===== --- 1.41/drivers/scsi/qla2xxx/qla_os.c 2004-08-09 16:48:29 -07:00 +++ edited/drivers/scsi/qla2xxx/qla_os.c 2004-09-22 00:12:41 -07:00 @@ -159,6 +159,20 @@ static int qla2x00_proc_info(struct Scsi_Host *, char *, char **, off_t, int, int); +static ssize_t qla2xxx_store_queue_depth(struct device *dev, const char *buf, size_t count); + +static struct device_attribute qla2xxx_queue_depth_attr = { + .attr = { + .name = "queue_depth", + .mode = S_IWUSR, + }, + .store = qla2xxx_store_queue_depth, +}; + +static struct device_attribute *qla2xxx_dev_attrs[] = { + &qla2xxx_queue_depth_attr, + NULL, +}; static struct scsi_host_template qla2x00_driver_template = { .module = THIS_MODULE, @@ -184,6 +198,8 @@ * which equates to 0x800000 sectors. */ .max_sectors = 0xFFFF, + + .sdev_attrs = qla2xxx_dev_attrs, }; static struct scsi_transport_template *qla2xxx_transport_template = NULL; @@ -1797,6 +1813,22 @@ } return (0); +} + +static ssize_t +qla2xxx_store_queue_depth(struct device *dev, const char *buf, size_t count) +{ + int depth; + struct scsi_device *sdev = to_scsi_device(dev); + + if (sdev->tagged_supported) { + depth = simple_strtoul(buf, NULL, 0); + if (depth > ql2xmaxqdepth) + return -EINVAL; + scsi_adjust_queue_depth(sdev, MSG_ORDERED_TAG, depth); + return count; + } + return 1; } /**