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Diffstat (limited to 'drivers/scsi/isci/port.h')
| -rw-r--r-- | drivers/scsi/isci/port.h | 306 |
1 files changed, 306 insertions, 0 deletions
diff --git a/drivers/scsi/isci/port.h b/drivers/scsi/isci/port.h new file mode 100644 index 000000000000..b50ecd4e8f9c --- /dev/null +++ b/drivers/scsi/isci/port.h @@ -0,0 +1,306 @@ +/* + * 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 + +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 + * @event: counts bcns and port stop events (for bcn filtering) + * @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 + * @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; + #define IPORT_BCN_BLOCKED 0 + #define IPORT_BCN_PENDING 1 + unsigned long flags; + atomic_t event; + 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; + 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_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_) */ |