359 строки
12 KiB
C
359 строки
12 KiB
C
/*
|
|
* 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.
|
|
*/
|
|
|
|
#ifndef _ISCI_REMOTE_DEVICE_H_
|
|
#define _ISCI_REMOTE_DEVICE_H_
|
|
#include <scsi/libsas.h>
|
|
#include <linux/kref.h>
|
|
#include "scu_remote_node_context.h"
|
|
#include "remote_node_context.h"
|
|
#include "port.h"
|
|
|
|
enum sci_remote_device_not_ready_reason_code {
|
|
SCIC_REMOTE_DEVICE_NOT_READY_START_REQUESTED,
|
|
SCIC_REMOTE_DEVICE_NOT_READY_STOP_REQUESTED,
|
|
SCIC_REMOTE_DEVICE_NOT_READY_SATA_REQUEST_STARTED,
|
|
SCIC_REMOTE_DEVICE_NOT_READY_SATA_SDB_ERROR_FIS_RECEIVED,
|
|
SCIC_REMOTE_DEVICE_NOT_READY_SMP_REQUEST_STARTED,
|
|
SCIC_REMOTE_DEVICE_NOT_READY_REASON_CODE_MAX
|
|
};
|
|
|
|
/**
|
|
* 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_EH 3
|
|
#define IDEV_GONE 4
|
|
#define IDEV_IO_READY 5
|
|
#define IDEV_IO_NCQERROR 6
|
|
unsigned long flags;
|
|
struct kref kref;
|
|
struct isci_port *isci_port;
|
|
struct domain_device *domain_dev;
|
|
struct list_head node;
|
|
struct list_head reqs_in_process;
|
|
struct sci_base_state_machine sm;
|
|
u32 device_port_width;
|
|
enum sas_linkrate connection_rate;
|
|
bool is_direct_attached;
|
|
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;
|
|
};
|
|
|
|
#define ISCI_REMOTE_DEVICE_START_TIMEOUT 5000
|
|
|
|
/* device reference routines must be called under sci_lock */
|
|
static inline struct isci_remote_device *isci_lookup_device(struct domain_device *dev)
|
|
{
|
|
struct isci_remote_device *idev = dev->lldd_dev;
|
|
|
|
if (idev && !test_bit(IDEV_GONE, &idev->flags)) {
|
|
kref_get(&idev->kref);
|
|
return idev;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
void isci_remote_device_release(struct kref *kref);
|
|
static inline void isci_put_device(struct isci_remote_device *idev)
|
|
{
|
|
if (idev)
|
|
kref_put(&idev->kref, isci_remote_device_release);
|
|
}
|
|
|
|
enum sci_status isci_remote_device_stop(struct isci_host *ihost,
|
|
struct isci_remote_device *idev);
|
|
void isci_remote_device_nuke_requests(struct isci_host *ihost,
|
|
struct isci_remote_device *idev);
|
|
void isci_remote_device_gone(struct domain_device *domain_dev);
|
|
int isci_remote_device_found(struct domain_device *domain_dev);
|
|
|
|
/**
|
|
* 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);
|
|
|
|
/**
|
|
* sci_remote_device_reset() - This method will reset the device making it
|
|
* ready for operation. This method must be called anytime the device is
|
|
* reset either through a SMP phy control or a port hard reset request.
|
|
* @remote_device: This parameter specifies the device to be reset.
|
|
*
|
|
* This method does not actually cause the device hardware to be reset. This
|
|
* method resets the software object so that it will be operational after a
|
|
* device hardware reset completes. An indication of whether the device reset
|
|
* was accepted. SCI_SUCCESS This value is returned if the device reset is
|
|
* started.
|
|
*/
|
|
enum sci_status sci_remote_device_reset(
|
|
struct isci_remote_device *idev);
|
|
|
|
/**
|
|
* sci_remote_device_reset_complete() - This method informs the device object
|
|
* that the reset operation is complete and the device can resume operation
|
|
* again.
|
|
* @remote_device: This parameter specifies the device which is to be informed
|
|
* of the reset complete operation.
|
|
*
|
|
* An indication that the device is resuming operation. SCI_SUCCESS the device
|
|
* is resuming operation.
|
|
*/
|
|
enum sci_status sci_remote_device_reset_complete(
|
|
struct isci_remote_device *idev);
|
|
|
|
/**
|
|
* enum sci_remote_device_states - This enumeration depicts all the states
|
|
* for the common remote device state machine.
|
|
*
|
|
*
|
|
*/
|
|
enum sci_remote_device_states {
|
|
/**
|
|
* Simply the initial state for the base remote device state machine.
|
|
*/
|
|
SCI_DEV_INITIAL,
|
|
|
|
/**
|
|
* 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_STOPPED,
|
|
|
|
/**
|
|
* 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_STARTING,
|
|
|
|
/**
|
|
* 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_DEV_READY,
|
|
|
|
/**
|
|
* 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_IDLE,
|
|
|
|
/**
|
|
* This is the command state for 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_CMD,
|
|
|
|
/**
|
|
* 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,
|
|
|
|
/**
|
|
* 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_NCQ_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_ATAPI_ERROR,
|
|
|
|
/**
|
|
* This is the READY substate indicates the device is waiting for the RESET task
|
|
* coming to be recovered from certain hardware specific error.
|
|
*/
|
|
SCI_STP_DEV_AWAIT_RESET,
|
|
|
|
/**
|
|
* This is the ready operational substate for the remote device. This is the
|
|
* normal operational state for a remote device.
|
|
*/
|
|
SCI_SMP_DEV_IDLE,
|
|
|
|
/**
|
|
* 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_SMP_DEV_CMD,
|
|
|
|
/**
|
|
* 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_STOPPING,
|
|
|
|
/**
|
|
* 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_FAILED,
|
|
|
|
/**
|
|
* 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_RESETTING,
|
|
|
|
/**
|
|
* Simply the final state for the base remote device state machine.
|
|
*/
|
|
SCI_DEV_FINAL,
|
|
};
|
|
|
|
static inline struct isci_remote_device *rnc_to_dev(struct sci_remote_node_context *rnc)
|
|
{
|
|
struct isci_remote_device *idev;
|
|
|
|
idev = container_of(rnc, typeof(*idev), rnc);
|
|
|
|
return idev;
|
|
}
|
|
|
|
static inline bool dev_is_expander(struct domain_device *dev)
|
|
{
|
|
return dev->dev_type == EDGE_DEV || dev->dev_type == FANOUT_DEV;
|
|
}
|
|
|
|
static inline void sci_remote_device_decrement_request_count(struct isci_remote_device *idev)
|
|
{
|
|
/* XXX delete this voodoo when converting to the top-level device
|
|
* reference count
|
|
*/
|
|
if (WARN_ONCE(idev->started_request_count == 0,
|
|
"%s: tried to decrement started_request_count past 0!?",
|
|
__func__))
|
|
/* pass */;
|
|
else
|
|
idev->started_request_count--;
|
|
}
|
|
|
|
enum sci_status sci_remote_device_frame_handler(
|
|
struct isci_remote_device *idev,
|
|
u32 frame_index);
|
|
|
|
enum sci_status sci_remote_device_event_handler(
|
|
struct isci_remote_device *idev,
|
|
u32 event_code);
|
|
|
|
enum sci_status sci_remote_device_start_io(
|
|
struct isci_host *ihost,
|
|
struct isci_remote_device *idev,
|
|
struct isci_request *ireq);
|
|
|
|
enum sci_status sci_remote_device_start_task(
|
|
struct isci_host *ihost,
|
|
struct isci_remote_device *idev,
|
|
struct isci_request *ireq);
|
|
|
|
enum sci_status sci_remote_device_complete_io(
|
|
struct isci_host *ihost,
|
|
struct isci_remote_device *idev,
|
|
struct isci_request *ireq);
|
|
|
|
enum sci_status sci_remote_device_suspend(
|
|
struct isci_remote_device *idev,
|
|
u32 suspend_type);
|
|
|
|
void sci_remote_device_post_request(
|
|
struct isci_remote_device *idev,
|
|
u32 request);
|
|
|
|
#endif /* !defined(_ISCI_REMOTE_DEVICE_H_) */
|