path: root/drivers/message/fusion/mptfc.c

/*
 *  linux/drivers/message/fusion/mptfc.c
 *      For use with LSI PCI chip/adapter(s)
 *      running LSI Fusion MPT (Message Passing Technology) firmware.
 *
 *  Copyright (c) 1999-2008 LSI Corporation
 *  (mailto:DL-MPTFusionLinux@lsi.com)
 *
 */
/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
/*
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; version 2 of the License.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    NO WARRANTY
    THE PROGRAM IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR
    CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT
    LIMITATION, ANY WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT,
    MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Each Recipient is
    solely responsible for determining the appropriateness of using and
    distributing the Program and assumes all risks associated with its
    exercise of rights under this Agreement, including but not limited to
    the risks and costs of program errors, damage to or loss of data,
    programs or equipment, and unavailability or interruption of operations.

    DISCLAIMER OF LIABILITY
    NEITHER RECIPIENT NOR ANY CONTRIBUTORS SHALL HAVE ANY LIABILITY FOR ANY
    DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
    DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS), HOWEVER CAUSED AND
    ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
    TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
    USE OR DISTRIBUTION OF THE PROGRAM OR THE EXERCISE OF ANY RIGHTS GRANTED
    HEREUNDER, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/
/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/kdev_t.h>
#include <linux/blkdev.h>
#include <linux/delay.h>	/* for mdelay */
#include <linux/interrupt.h>
#include <linux/reboot.h>	/* notifier code */
#include <linux/workqueue.h>
#include <linux/sort.h>
#include <linux/slab.h>

#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_tcq.h>
#include <scsi/scsi_transport_fc.h>

#include "mptbase.h"
#include "mptscsih.h"

/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
#define my_NAME		"Fusion MPT FC Host driver"
#define my_VERSION	MPT_LINUX_VERSION_COMMON
#define MYNAM		"mptfc"

MODULE_AUTHOR(MODULEAUTHOR);
MODULE_DESCRIPTION(my_NAME);
MODULE_LICENSE("GPL");
MODULE_VERSION(my_VERSION);

/* Command line args */
#define MPTFC_DEV_LOSS_TMO (60)
static int mptfc_dev_loss_tmo = MPTFC_DEV_LOSS_TMO;	/* reasonable default */
module_param(mptfc_dev_loss_tmo, int, 0);
MODULE_PARM_DESC(mptfc_dev_loss_tmo, " Initial time the driver programs the "
    				     " transport to wait for an rport to "
				     " return following a device loss event."
				     "  Default=60.");

/* scsi-mid layer global parmeter is max_report_luns, which is 511 */
#define MPTFC_MAX_LUN (16895)
static int max_lun = MPTFC_MAX_LUN;
module_param(max_lun, int, 0);
MODULE_PARM_DESC(max_lun, " max lun, default=16895 ");

static u8	mptfcDoneCtx = MPT_MAX_PROTOCOL_DRIVERS;
static u8	mptfcTaskCtx = MPT_MAX_PROTOCOL_DRIVERS;
static u8	mptfcInternalCtx = MPT_MAX_PROTOCOL_DRIVERS;

static int mptfc_target_alloc(struct scsi_target *starget);
static int mptfc_slave_alloc(struct scsi_device *sdev);
static int mptfc_qcmd(struct Scsi_Host *shost, struct scsi_cmnd *SCpnt);
static void mptfc_target_destroy(struct scsi_target *starget);
static void mptfc_set_rport_loss_tmo(struct fc_rport *rport, uint32_t timeout);
static void mptfc_remove(struct pci_dev *pdev);
static int mptfc_abort(struct scsi_cmnd *SCpnt);
static int mptfc_dev_reset(struct scsi_cmnd *SCpnt);
static int mptfc_bus_reset(struct scsi_cmnd *SCpnt);

static const struct scsi_host_template mptfc_driver_template = {
	.module				= THIS_MODULE,
	.proc_name			= "mptfc",
	.show_info			= mptscsih_show_info,
	.name				= "MPT FC Host",
	.info				= mptscsih_info,
	.queuecommand			= mptfc_qcmd,
	.target_alloc			= mptfc_target_alloc,
	.slave_alloc			= mptfc_slave_alloc,
	.slave_configure		= mptscsih_slave_configure,
	.target_destroy			= mptfc_target_destroy,
	.slave_destroy			= mptscsih_slave_destroy,
	.change_queue_depth 		= mptscsih_change_queue_depth,
	.eh_timed_out			= fc_eh_timed_out,
	.eh_abort_handler		= mptfc_abort,
	.eh_device_reset_handler	= mptfc_dev_reset,
	.eh_bus_reset_handler		= mptfc_bus_reset,
	.eh_host_reset_handler		= mptscsih_host_reset,
	.bios_param			= mptscsih_bios_param,
	.can_queue			= MPT_FC_CAN_QUEUE,
	.this_id			= -1,
	.sg_tablesize			= MPT_SCSI_SG_DEPTH,
	.max_sectors			= 8192,
	.cmd_per_lun			= 7,
	.dma_alignment			= 511,
	.shost_groups			= mptscsih_host_attr_groups,
};

/****************************************************************************
 * Supported hardware
 */

static struct pci_device_id mptfc_pci_table[] = {
	{ PCI_VENDOR_ID_LSI_LOGIC, MPI_MANUFACTPAGE_DEVICEID_FC909,
		PCI_ANY_ID, PCI_ANY_ID },
	{ PCI_VENDOR_ID_LSI_LOGIC, MPI_MANUFACTPAGE_DEVICEID_FC919,
		PCI_ANY_ID, PCI_ANY_ID },
	{ PCI_VENDOR_ID_LSI_LOGIC, MPI_MANUFACTPAGE_DEVICEI