313 lines
9.3 KiB
C
313 lines
9.3 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_PORT_H_
|
|
#define _ISCI_PORT_H_
|
|
|
|
#include <scsi/libsas.h>
|
|
#include "isci.h"
|
|
#include "sas.h"
|
|
#include "phy.h"
|
|
|
|
#define SCIC_SDS_DUMMY_PORT 0xFF
|
|
|
|
#define PF_NOTIFY (1 << 0)
|
|
#define PF_RESUME (1 << 1)
|
|
|
|
struct isci_phy;
|
|
struct isci_host;
|
|
|
|
enum isci_status {
|
|
isci_freed = 0x00,
|
|
isci_starting = 0x01,
|
|
isci_ready = 0x02,
|
|
isci_ready_for_io = 0x03,
|
|
isci_stopping = 0x04,
|
|
isci_stopped = 0x05,
|
|
};
|
|
|
|
/**
|
|
* struct isci_port - isci direct attached sas port object
|
|
* @ready_exit: several states constitute 'ready'. When exiting ready we
|
|
* need to take extra port-teardown actions that are
|
|
* skipped when exiting to another 'ready' state.
|
|
* @logical_port_index: software port index
|
|
* @physical_port_index: hardware port index
|
|
* @active_phy_mask: identifies phy members
|
|
* @enabled_phy_mask: phy mask for the port
|
|
* that are already part of the port
|
|
* @reserved_tag:
|
|
* @reserved_rni: reserver for port task scheduler workaround
|
|
* @started_request_count: reference count for outstanding commands
|
|
* @not_ready_reason: set during state transitions and notified
|
|
* @timer: timeout start/stop operations
|
|
*/
|
|
struct isci_port {
|
|
enum isci_status status;
|
|
struct isci_host *isci_host;
|
|
struct asd_sas_port sas_port;
|
|
struct list_head remote_dev_list;
|
|
spinlock_t state_lock;
|
|
struct list_head domain_dev_list;
|
|
struct completion start_complete;
|
|
struct completion hard_reset_complete;
|
|
enum sci_status hard_reset_status;
|
|
struct sci_base_state_machine sm;
|
|
bool ready_exit;
|
|
u8 logical_port_index;
|
|
u8 physical_port_index;
|
|
u8 active_phy_mask;
|
|
u8 enabled_phy_mask;
|
|
u8 last_active_phy;
|
|
u16 reserved_rni;
|
|
u16 reserved_tag;
|
|
u32 started_request_count;
|
|
u32 assigned_device_count;
|
|
u32 not_ready_reason;
|
|
struct isci_phy *phy_table[SCI_MAX_PHYS];
|
|
struct isci_host *owning_controller;
|
|
struct sci_timer timer;
|
|
struct scu_port_task_scheduler_registers __iomem *port_task_scheduler_registers;
|
|
/* XXX rework: only one register, no need to replicate per-port */
|
|
u32 __iomem *port_pe_configuration_register;
|
|
struct scu_viit_entry __iomem *viit_registers;
|
|
};
|
|
|
|
enum sci_port_not_ready_reason_code {
|
|
SCIC_PORT_NOT_READY_NO_ACTIVE_PHYS,
|
|
SCIC_PORT_NOT_READY_HARD_RESET_REQUESTED,
|
|
SCIC_PORT_NOT_READY_INVALID_PORT_CONFIGURATION,
|
|
SCIC_PORT_NOT_READY_RECONFIGURING,
|
|
|
|
SCIC_PORT_NOT_READY_REASON_CODE_MAX
|
|
};
|
|
|
|
struct sci_port_end_point_properties {
|
|
struct sci_sas_address sas_address;
|
|
struct sci_phy_proto protocols;
|
|
};
|
|
|
|
struct sci_port_properties {
|
|
u32 index;
|
|
struct sci_port_end_point_properties local;
|
|
struct sci_port_end_point_properties remote;
|
|
u32 phy_mask;
|
|
};
|
|
|
|
/**
|
|
* enum sci_port_states - This enumeration depicts all the states for the
|
|
* common port state machine.
|
|
*
|
|
*
|
|
*/
|
|
enum sci_port_states {
|
|
/**
|
|
* This state indicates that the port has successfully been stopped.
|
|
* In this state no new IO operations are permitted.
|
|
* This state is entered from the STOPPING state.
|
|
*/
|
|
SCI_PORT_STOPPED,
|
|
|
|
/**
|
|
* This state indicates that the port 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.
|
|
*/
|
|
SCI_PORT_STOPPING,
|
|
|
|
/**
|
|
* This state indicates the port is now ready. Thus, the user is
|
|
* able to perform IO operations on this port.
|
|
* This state is entered from the STARTING state.
|
|
*/
|
|
SCI_PORT_READY,
|
|
|
|
/**
|
|
* The substate where the port is started and ready but has no
|
|
* active phys.
|
|
*/
|
|
SCI_PORT_SUB_WAITING,
|
|
|
|
/**
|
|
* The substate where the port is started and ready and there is
|
|
* at least one phy operational.
|
|
*/
|
|
SCI_PORT_SUB_OPERATIONAL,
|
|
|
|
/**
|
|
* The substate where the port is started and there was an
|
|
* add/remove phy event. This state is only used in Automatic
|
|
* Port Configuration Mode (APC)
|
|
*/
|
|
SCI_PORT_SUB_CONFIGURING,
|
|
|
|
/**
|
|
* This state indicates the port is in the process of performing a hard
|
|
* reset. Thus, the user is unable to perform IO operations on this
|
|
* port.
|
|
* This state is entered from the READY state.
|
|
*/
|
|
SCI_PORT_RESETTING,
|
|
|
|
/**
|
|
* This state indicates the port has failed a reset request. This state
|
|
* is entered when a port reset request times out.
|
|
* This state is entered from the RESETTING state.
|
|
*/
|
|
SCI_PORT_FAILED,
|
|
|
|
|
|
};
|
|
|
|
static inline void sci_port_decrement_request_count(struct isci_port *iport)
|
|
{
|
|
if (WARN_ONCE(iport->started_request_count == 0,
|
|
"%s: tried to decrement started_request_count past 0!?",
|
|
__func__))
|
|
/* pass */;
|
|
else
|
|
iport->started_request_count--;
|
|
}
|
|
|
|
#define sci_port_active_phy(port, phy) \
|
|
(((port)->active_phy_mask & (1 << (phy)->phy_index)) != 0)
|
|
|
|
void sci_port_construct(
|
|
struct isci_port *iport,
|
|
u8 port_index,
|
|
struct isci_host *ihost);
|
|
|
|
enum sci_status sci_port_start(struct isci_port *iport);
|
|
enum sci_status sci_port_stop(struct isci_port *iport);
|
|
|
|
enum sci_status sci_port_add_phy(
|
|
struct isci_port *iport,
|
|
struct isci_phy *iphy);
|
|
|
|
enum sci_status sci_port_remove_phy(
|
|
struct isci_port *iport,
|
|
struct isci_phy *iphy);
|
|
|
|
void sci_port_setup_transports(
|
|
struct isci_port *iport,
|
|
u32 device_id);
|
|
|
|
void isci_port_bcn_enable(struct isci_host *, struct isci_port *);
|
|
|
|
void sci_port_deactivate_phy(
|
|
struct isci_port *iport,
|
|
struct isci_phy *iphy,
|
|
bool do_notify_user);
|
|
|
|
bool sci_port_link_detected(
|
|
struct isci_port *iport,
|
|
struct isci_phy *iphy);
|
|
|
|
enum sci_status sci_port_get_properties(
|
|
struct isci_port *iport,
|
|
struct sci_port_properties *prop);
|
|
|
|
enum sci_status sci_port_link_up(struct isci_port *iport,
|
|
struct isci_phy *iphy);
|
|
enum sci_status sci_port_link_down(struct isci_port *iport,
|
|
struct isci_phy *iphy);
|
|
|
|
struct isci_request;
|
|
struct isci_remote_device;
|
|
enum sci_status sci_port_start_io(
|
|
struct isci_port *iport,
|
|
struct isci_remote_device *idev,
|
|
struct isci_request *ireq);
|
|
|
|
enum sci_status sci_port_complete_io(
|
|
struct isci_port *iport,
|
|
struct isci_remote_device *idev,
|
|
struct isci_request *ireq);
|
|
|
|
enum sas_linkrate sci_port_get_max_allowed_speed(
|
|
struct isci_port *iport);
|
|
|
|
void sci_port_broadcast_change_received(
|
|
struct isci_port *iport,
|
|
struct isci_phy *iphy);
|
|
|
|
bool sci_port_is_valid_phy_assignment(
|
|
struct isci_port *iport,
|
|
u32 phy_index);
|
|
|
|
void sci_port_get_sas_address(
|
|
struct isci_port *iport,
|
|
struct sci_sas_address *sas_address);
|
|
|
|
void sci_port_get_attached_sas_address(
|
|
struct isci_port *iport,
|
|
struct sci_sas_address *sas_address);
|
|
|
|
enum isci_status isci_port_get_state(
|
|
struct isci_port *isci_port);
|
|
|
|
void isci_port_formed(struct asd_sas_phy *);
|
|
void isci_port_deformed(struct asd_sas_phy *);
|
|
|
|
void isci_port_init(
|
|
struct isci_port *port,
|
|
struct isci_host *host,
|
|
int index);
|
|
|
|
int isci_port_perform_hard_reset(struct isci_host *ihost, struct isci_port *iport,
|
|
struct isci_phy *iphy);
|
|
#endif /* !defined(_ISCI_PORT_H_) */
|