/* * This file is provided under a dual BSD/GPLv2 license. When using or * redistributing this file, you may do so under either license. * * GPL LICENSE SUMMARY * * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of version 2 of the GNU General Public License as * published by the Free Software Foundation. * * 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. * * 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 St - Fifth Floor, Boston, MA 02110-1301 USA. * The full GNU General Public License is included in this distribution * in the file called LICENSE.GPL. * * BSD LICENSE * * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * * Neither the name of Intel Corporation nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 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 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/** * isci_remote_device - isci representation of a sas expander / end point * @device_port_width: hw setting for number of simultaneous connections * @connection_rate: per-taskcontext connection rate for this device * @working_request: SATA requests have no tag we for unaccelerated * protocols we need a method to associate unsolicited * frames with a pending request
*/ struct isci_remote_device { #define IDEV_START_PENDING 0 #define IDEV_STOP_PENDING 1 #define IDEV_ALLOCATED 2 #define IDEV_GONE 3 #define IDEV_IO_READY 4 #define IDEV_IO_NCQERROR 5 #define IDEV_RNC_LLHANG_ENABLED 6 #define IDEV_ABORT_PATH_ACTIVE 7 #define IDEV_ABORT_PATH_RESUME_PENDING 8 unsignedlong flags; struct kref kref; struct isci_port *isci_port; struct domain_device *domain_dev; struct list_head node; struct sci_base_state_machine sm;
u32 device_port_width; enum sas_linkrate connection_rate; struct isci_port *owning_port; struct sci_remote_node_context rnc; /* XXX unify with device reference counting and delete */
u32 started_request_count; struct isci_request *working_request;
u32 not_ready_reason;
scics_sds_remote_node_context_callback abort_resume_cb; void *abort_resume_cbparam;
};
#define ISCI_REMOTE_DEVICE_START_TIMEOUT 5000
/* device reference routines must be called under sci_lock */ staticinlinestruct isci_remote_device *isci_get_device( struct isci_remote_device *idev)
{ if (idev)
kref_get(&idev->kref); return idev;
}
/** * sci_remote_device_stop() - This method will stop both transmission and * reception of link activity for the supplied remote device. This method * disables normal IO requests from flowing through to the remote device. * @remote_device: This parameter specifies the device to be stopped. * @timeout: This parameter specifies the number of milliseconds in which the * stop operation should complete. * * An indication of whether the device was successfully stopped. SCI_SUCCESS * This value is returned if the transmission and reception for the device was * successfully stopped.
*/ enum sci_status sci_remote_device_stop( struct isci_remote_device *idev,
u32 timeout);
/** * enum sci_remote_device_states - This enumeration depicts all the states * for the common remote device state machine. * @SCI_DEV_INITIAL: Simply the initial state for the base remote device * state machine. * * @SCI_DEV_STOPPED: This state indicates that the remote device has * successfully been stopped. In this state no new IO operations are * permitted. This state is entered from the INITIAL state. This state * is entered from the STOPPING state. * * @SCI_DEV_STARTING: This state indicates the the remote device is in * the process of becoming ready (i.e. starting). In this state no new * IO operations are permitted. This state is entered from the STOPPED * state. * * @SCI_DEV_READY: This state indicates the remote device is now ready. * Thus, the user is able to perform IO operations on the remote device. * This state is entered from the STARTING state. * * @SCI_STP_DEV_IDLE: This is the idle substate for the stp remote * device. When there are no active IO for the device it is is in this * state. * * @SCI_STP_DEV_CMD: This is the command state for the STP remote * device. This state is entered when the device is processing a * non-NCQ command. The device object will fail any new start IO * requests until this command is complete. * * @SCI_STP_DEV_NCQ: This is the NCQ state for the STP remote device. * This state is entered when the device is processing an NCQ reuqest. * It will remain in this state so long as there is one or more NCQ * requests being processed. * * @SCI_STP_DEV_NCQ_ERROR: This is the NCQ error state for the STP * remote device. This state is entered when an SDB error FIS is * received by the device object while in the NCQ state. The device * object will only accept a READ LOG command while in this state. * * @SCI_STP_DEV_ATAPI_ERROR: This is the ATAPI error state for the STP * ATAPI remote device. This state is entered when ATAPI device sends * error status FIS without data while the device object is in CMD * state. A suspension event is expected in this state. The device * object will resume right away. * * @SCI_STP_DEV_AWAIT_RESET: This is the READY substate indicates the * device is waiting for the RESET task coming to be recovered from * certain hardware specific error. * * @SCI_SMP_DEV_IDLE: This is the ready operational substate for the * remote device. This is the normal operational state for a remote * device. * * @SCI_SMP_DEV_CMD: This is the suspended state for the remote device. * This is the state that the device is placed in when a RNC suspend is * received by the SCU hardware. * * @SCI_DEV_STOPPING: This state indicates that the remote device is in * the process of stopping. In this state no new IO operations are * permitted, but existing IO operations are allowed to complete. This * state is entered from the READY state. This state is entered from * the FAILED state. * * @SCI_DEV_FAILED: This state indicates that the remote device has * failed. In this state no new IO operations are permitted. This * state is entered from the INITIALIZING state. This state is entered * from the READY state. * * @SCI_DEV_RESETTING: This state indicates the device is being reset. * In this state no new IO operations are permitted. This state is * entered from the READY state. * * @SCI_DEV_FINAL: Simply the final state for the base remote device * state machine.
*/ #define REMOTE_DEV_STATES {\
C(DEV_INITIAL),\
C(DEV_STOPPED),\
C(DEV_STARTING),\
C(DEV_READY),\
C(STP_DEV_IDLE),\
C(STP_DEV_CMD),\
C(STP_DEV_NCQ),\
C(STP_DEV_NCQ_ERROR),\
C(STP_DEV_ATAPI_ERROR),\
C(STP_DEV_AWAIT_RESET),\
C(SMP_DEV_IDLE),\
C(SMP_DEV_CMD),\
C(DEV_STOPPING),\
C(DEV_FAILED),\
C(DEV_RESETTING),\
C(DEV_FINAL),\
} #undef C #define C(a) SCI_##a enum sci_remote_device_states REMOTE_DEV_STATES; #undef C constchar *dev_state_name(enum sci_remote_device_states state);
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