path: root/drivers/scsi/mpt2sas/mpt2sas_transport.c

/*
 * SAS Transport Layer for MPT (Message Passing Technology) based controllers
 *
 * This code is based on drivers/scsi/mpt2sas/mpt2_transport.c
 * Copyright (C) 2007-2009  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; either version 2
 * of the License, or (at your option) any later version.
 *
 * 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
 * USA.
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/sched.h>
#include <linux/workqueue.h>
#include <linux/delay.h>
#include <linux/pci.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_transport_sas.h>
#include <scsi/scsi_dbg.h>

#include "mpt2sas_base.h"
/**
 * _transport_sas_node_find_by_sas_address - sas node search
 * @ioc: per adapter object
 * @sas_address: sas address of expander or sas host
 * Context: Calling function should acquire ioc->sas_node_lock.
 *
 * Search for either hba phys or expander device based on handle, then returns
 * the sas_node object.
 */
static struct _sas_node *
_transport_sas_node_find_by_sas_address(struct MPT2SAS_ADAPTER *ioc,
    u64 sas_address)
{
	if (ioc->sas_hba.sas_address == sas_address)
		return &ioc->sas_hba;
	else
		return mpt2sas_scsih_expander_find_by_sas_address(ioc,
		    sas_address);
}

/**
 * _transport_convert_phy_link_rate -
 * @link_rate: link rate returned from mpt firmware
 *
 * Convert link_rate from mpi fusion into sas_transport form.
 */
static enum sas_linkrate
_transport_convert_phy_link_rate(u8 link_rate)
{
	enum sas_linkrate rc;

	switch (link_rate) {
	case MPI2_SAS_NEG_LINK_RATE_1_5:
		rc = SAS_LINK_RATE_1_5_GBPS;
		break;
	case MPI2_SAS_NEG_LINK_RATE_3_0:
		rc = SAS_LINK_RATE_3_0_GBPS;
		break