/* * 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.
*/
/** * 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 { struct isci_host *isci_host; struct list_head remote_dev_list; #define IPORT_RESET_PENDING 0 unsignedlong state; 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 hang_detect_users;
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_states - port state machine states * @SCI_PORT_STOPPED: port has successfully been stopped. In this state * no new IO operations are permitted. This state is * entered from the STOPPING state. * @SCI_PORT_STOPPING: 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_READY: 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_SUB_WAITING: port is started and ready but has no active * phys. * @SCI_PORT_SUB_OPERATIONAL: port is started and ready and there is at * least one phy operational. * @SCI_PORT_SUB_CONFIGURING: port is started and there was an * add/remove phy event. This state is only * used in Automatic Port Configuration Mode * (APC) * @SCI_PORT_RESETTING: 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_FAILED: 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.
*/ #define PORT_STATES {\
C(PORT_STOPPED),\
C(PORT_STOPPING),\
C(PORT_READY),\
C(PORT_SUB_WAITING),\
C(PORT_SUB_OPERATIONAL),\
C(PORT_SUB_CONFIGURING),\
C(PORT_RESETTING),\
C(PORT_FAILED),\
} #undef C #define C(a) SCI_##a enum sci_port_states PORT_STATES; #undef C
staticinlinevoid 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--;
}
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