mirror of https://gitee.com/openkylin/linux.git
402 lines
11 KiB
C
402 lines
11 KiB
C
/*
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* This file is provided under a dual BSD/GPLv2 license. When using or
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* redistributing this file, you may do so under either license.
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*
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* GPL LICENSE SUMMARY
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*
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* Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
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* The full GNU General Public License is included in this distribution
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* in the file called LICENSE.GPL.
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*
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* BSD LICENSE
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*
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* Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _ISCI_PORT_H_
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#define _ISCI_PORT_H_
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#include <scsi/libsas.h>
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#include "isci.h"
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#include "sas.h"
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#include "phy.h"
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#define SCIC_SDS_DUMMY_PORT 0xFF
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struct isci_phy;
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struct isci_host;
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enum isci_status {
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isci_freed = 0x00,
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isci_starting = 0x01,
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isci_ready = 0x02,
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isci_ready_for_io = 0x03,
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isci_stopping = 0x04,
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isci_stopped = 0x05,
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};
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/**
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* struct scic_sds_port
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*
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* The core port object provides the the abstraction for an SCU port.
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*/
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struct scic_sds_port {
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/**
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* This field contains the information for the base port state machine.
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*/
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struct sci_base_state_machine sm;
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bool ready_exit;
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/**
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* This field is the port index that is reported to the SCI USER.
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* This allows the actual hardware physical port to change without
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* the SCI USER getting a different answer for the get port index.
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*/
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u8 logical_port_index;
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/**
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* This field is the port index used to program the SCU hardware.
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*/
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u8 physical_port_index;
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/**
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* This field contains the active phy mask for the port.
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* This mask is used in conjunction with the phy state to determine
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* which phy to select for some port operations.
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*/
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u8 active_phy_mask;
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u16 reserved_rni;
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u16 reserved_tag;
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/**
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* This field contains the count of the io requests started on this port
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* object. It is used to control controller shutdown.
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*/
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u32 started_request_count;
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/**
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* This field contains the number of devices assigned to this port.
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* It is used to control port start requests.
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*/
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u32 assigned_device_count;
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/**
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* This field contains the reason for the port not going ready. It is
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* assigned in the state handlers and used in the state transition.
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*/
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u32 not_ready_reason;
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/**
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* This field is the table of phys assigned to the port.
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*/
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struct isci_phy *phy_table[SCI_MAX_PHYS];
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/**
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* This field is a pointer back to the controller that owns this
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* port object.
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*/
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struct scic_sds_controller *owning_controller;
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/* timer used for port start/stop operations */
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struct sci_timer timer;
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/**
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* This field is the pointer to the port task scheduler registers
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* for the SCU hardware.
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*/
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struct scu_port_task_scheduler_registers __iomem
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*port_task_scheduler_registers;
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/**
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* This field is identical for all port objects and points to the port
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* task scheduler group PE configuration registers.
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* It is used to assign PEs to a port.
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*/
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u32 __iomem *port_pe_configuration_register;
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/**
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* This field is the VIIT register space for ths port object.
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*/
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struct scu_viit_entry __iomem *viit_registers;
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};
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/**
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* struct isci_port - This class represents the port object used to internally
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* represent libsas port objects. It also keeps a list of remote device
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* objects.
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*
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*
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*/
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struct isci_port {
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enum isci_status status;
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#define IPORT_BCN_BLOCKED 0
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#define IPORT_BCN_PENDING 1
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unsigned long flags;
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atomic_t event;
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struct isci_host *isci_host;
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struct asd_sas_port sas_port;
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struct list_head remote_dev_list;
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spinlock_t state_lock;
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struct list_head domain_dev_list;
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struct completion start_complete;
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struct completion hard_reset_complete;
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enum sci_status hard_reset_status;
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struct scic_sds_port sci;
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};
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static inline struct isci_port *sci_port_to_iport(struct scic_sds_port *sci_port)
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{
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struct isci_port *iport = container_of(sci_port, typeof(*iport), sci);
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return iport;
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}
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enum scic_port_not_ready_reason_code {
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SCIC_PORT_NOT_READY_NO_ACTIVE_PHYS,
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SCIC_PORT_NOT_READY_HARD_RESET_REQUESTED,
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SCIC_PORT_NOT_READY_INVALID_PORT_CONFIGURATION,
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SCIC_PORT_NOT_READY_RECONFIGURING,
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SCIC_PORT_NOT_READY_REASON_CODE_MAX
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};
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struct scic_port_end_point_properties {
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struct sci_sas_address sas_address;
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struct scic_phy_proto protocols;
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};
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struct scic_port_properties {
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u32 index;
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struct scic_port_end_point_properties local;
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struct scic_port_end_point_properties remote;
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u32 phy_mask;
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};
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/**
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* enum scic_sds_port_states - This enumeration depicts all the states for the
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* common port state machine.
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*
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*
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*/
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enum scic_sds_port_states {
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/**
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* This state indicates that the port has successfully been stopped.
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* In this state no new IO operations are permitted.
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* This state is entered from the STOPPING state.
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*/
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SCI_PORT_STOPPED,
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/**
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* This state indicates that the port is in the process of stopping.
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* In this state no new IO operations are permitted, but existing IO
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* operations are allowed to complete.
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* This state is entered from the READY state.
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*/
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SCI_PORT_STOPPING,
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/**
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* This state indicates the port is now ready. Thus, the user is
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* able to perform IO operations on this port.
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* This state is entered from the STARTING state.
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*/
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SCI_PORT_READY,
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/**
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* The substate where the port is started and ready but has no
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* active phys.
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*/
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SCI_PORT_SUB_WAITING,
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/**
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* The substate where the port is started and ready and there is
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* at least one phy operational.
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*/
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SCI_PORT_SUB_OPERATIONAL,
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/**
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* The substate where the port is started and there was an
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* add/remove phy event. This state is only used in Automatic
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* Port Configuration Mode (APC)
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*/
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SCI_PORT_SUB_CONFIGURING,
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/**
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* This state indicates the port is in the process of performing a hard
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* reset. Thus, the user is unable to perform IO operations on this
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* port.
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* This state is entered from the READY state.
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*/
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SCI_PORT_RESETTING,
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/**
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* This state indicates the port has failed a reset request. This state
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* is entered when a port reset request times out.
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* This state is entered from the RESETTING state.
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*/
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SCI_PORT_FAILED,
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};
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/**
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* scic_sds_port_get_controller() -
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*
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* Helper macro to get the owning controller of this port
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*/
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#define scic_sds_port_get_controller(this_port) \
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((this_port)->owning_controller)
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/**
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* scic_sds_port_get_index() -
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*
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* This macro returns the physical port index for this port object
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*/
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#define scic_sds_port_get_index(this_port) \
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((this_port)->physical_port_index)
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static inline void scic_sds_port_decrement_request_count(struct scic_sds_port *sci_port)
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{
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if (WARN_ONCE(sci_port->started_request_count == 0,
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"%s: tried to decrement started_request_count past 0!?",
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__func__))
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/* pass */;
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else
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sci_port->started_request_count--;
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}
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#define scic_sds_port_active_phy(port, phy) \
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(((port)->active_phy_mask & (1 << (phy)->phy_index)) != 0)
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void scic_sds_port_construct(
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struct scic_sds_port *sci_port,
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u8 port_index,
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struct scic_sds_controller *scic);
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enum sci_status scic_sds_port_initialize(
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struct scic_sds_port *sci_port,
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void __iomem *port_task_scheduler_registers,
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void __iomem *port_configuration_regsiter,
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void __iomem *viit_registers);
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enum sci_status scic_sds_port_start(struct scic_sds_port *sci_port);
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enum sci_status scic_sds_port_stop(struct scic_sds_port *sci_port);
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enum sci_status scic_sds_port_add_phy(
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struct scic_sds_port *sci_port,
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struct isci_phy *iphy);
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enum sci_status scic_sds_port_remove_phy(
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struct scic_sds_port *sci_port,
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struct isci_phy *iphy);
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void scic_sds_port_setup_transports(
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struct scic_sds_port *sci_port,
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u32 device_id);
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void isci_port_bcn_enable(struct isci_host *, struct isci_port *);
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void scic_sds_port_deactivate_phy(
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struct scic_sds_port *sci_port,
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struct isci_phy *iphy,
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bool do_notify_user);
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bool scic_sds_port_link_detected(
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struct scic_sds_port *sci_port,
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struct isci_phy *iphy);
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enum sci_status scic_sds_port_link_up(struct scic_sds_port *sci_port,
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struct isci_phy *iphy);
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enum sci_status scic_sds_port_link_down(struct scic_sds_port *sci_port,
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struct isci_phy *iphy);
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struct isci_request;
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struct scic_sds_remote_device;
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enum sci_status scic_sds_port_start_io(
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struct scic_sds_port *sci_port,
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struct scic_sds_remote_device *sci_dev,
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struct isci_request *ireq);
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enum sci_status scic_sds_port_complete_io(
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struct scic_sds_port *sci_port,
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struct scic_sds_remote_device *sci_dev,
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struct isci_request *ireq);
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enum sas_linkrate scic_sds_port_get_max_allowed_speed(
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struct scic_sds_port *sci_port);
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void scic_sds_port_broadcast_change_received(
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struct scic_sds_port *sci_port,
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struct isci_phy *iphy);
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bool scic_sds_port_is_valid_phy_assignment(
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struct scic_sds_port *sci_port,
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u32 phy_index);
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void scic_sds_port_get_sas_address(
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struct scic_sds_port *sci_port,
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struct sci_sas_address *sas_address);
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void scic_sds_port_get_attached_sas_address(
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struct scic_sds_port *sci_port,
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struct sci_sas_address *sas_address);
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enum isci_status isci_port_get_state(
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struct isci_port *isci_port);
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void isci_port_formed(struct asd_sas_phy *);
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void isci_port_deformed(struct asd_sas_phy *);
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void isci_port_init(
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struct isci_port *port,
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struct isci_host *host,
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int index);
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int isci_port_perform_hard_reset(struct isci_host *ihost, struct isci_port *iport,
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struct isci_phy *iphy);
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#endif /* !defined(_ISCI_PORT_H_) */
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