diff options
Diffstat (limited to 'drivers/scsi/isci/core/scic_sds_port.h')
-rw-r--r-- | drivers/scsi/isci/core/scic_sds_port.h | 514 |
1 files changed, 514 insertions, 0 deletions
diff --git a/drivers/scsi/isci/core/scic_sds_port.h b/drivers/scsi/isci/core/scic_sds_port.h new file mode 100644 index 0000000..bbb9de5 --- /dev/null +++ b/drivers/scsi/isci/core/scic_sds_port.h @@ -0,0 +1,514 @@ +/* + * 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 _SCIC_SDS_PORT_H_ +#define _SCIC_SDS_PORT_H_ + +/** + * This file contains the structures, constants and prototypes for the + * struct scic_sds_port object. + * + * + */ + +#include "sci_controller_constants.h" +#include "intel_sas.h" +#include "sci_base_port.h" +#include "sci_base_phy.h" +#include "scu_registers.h" + +#define SCIC_SDS_DUMMY_PORT 0xFF + +/** + * enum SCIC_SDS_PORT_READY_SUBSTATES - + * + * This enumeration depicts all of the states for the core port ready substate + * machine. + */ +enum SCIC_SDS_PORT_READY_SUBSTATES { + /** + * The substate where the port is started and ready but has no active phys. + */ + SCIC_SDS_PORT_READY_SUBSTATE_WAITING, + + /** + * The substate where the port is started and ready and there is at least one + * phy operational. + */ + SCIC_SDS_PORT_READY_SUBSTATE_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) + */ + SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING, + + SCIC_SDS_PORT_READY_MAX_SUBSTATES +}; + +struct scic_sds_controller; +struct scic_sds_phy; +struct scic_sds_remote_device; +struct scic_sds_request; + +/** + * struct scic_sds_port - + * + * The core port object provides the the abstraction for an SCU port. + */ +struct scic_sds_port { + /** + * This field is the oommon base port object. + */ + struct sci_base_port parent; + + /** + * This field is the port index that is reported to the SCI USER. This allows + * the actual hardware physical port to change without the SCI USER getting a + * different answer for the get port index. + */ + u8 logical_port_index; + + /** + * This field is the port index used to program the SCU hardware. + */ + u8 physical_port_index; + + /** + * This field contains the active phy mask for the port. This mask is used in + * conjunction with the phy state to determine which phy to select for some + * port operations. + */ + u8 active_phy_mask; + + /** + * This field contains the count of the io requests started on this port + * object. It is used to control controller shutdown. + */ + u32 started_request_count; + + /** + * This field contains the number of devices assigned to this port. It is + * used to control port start requests. + */ + u32 assigned_device_count; + + /** + * This field contains the reason for the port not going ready. It is + * assigned in the state handlers and used in the state transition. + */ + u32 not_ready_reason; + + /** + * This field is the table of phys assigned to the port. + */ + struct scic_sds_phy *phy_table[SCI_MAX_PHYS]; + + /** + * This field is a pointer back to the controller that owns this port object. + */ + struct scic_sds_controller *owning_controller; + + /** + * This field contains the port start/stop timer handle. + */ + void *timer_handle; + + /** + * This field points to the current set of state handlers for this port + * object. These state handlers are assigned at each enter state of the state + * machine. + */ + struct scic_sds_port_state_handler *state_handlers; + + /** + * This field is the ready substate machine for the port. + */ + struct sci_base_state_machine ready_substate_machine; + + /* / Memory mapped hardware register space */ + /** + * This field is the pointer to the transport layer register for the SCU + * hardware. + */ + struct scu_transport_layer_registers *transport_layer_registers; + + /** + * This field is the pointer to the port task scheduler registers for the SCU + * hardware. + */ + struct scu_port_task_scheduler_registers *port_task_scheduler_registers; + + /** + * This field is identical for all port objects and points to the port task + * scheduler group PE configuration registers. It is used to assign PEs to a + * port. + */ + SCU_PORT_PE_CONFIGURATION_REGISTER_T *port_pe_configuration_register; + + /** + * This field is the VIIT register space for ths port object. + */ + struct scu_viit_entry *viit_registers; + +}; + + +typedef enum sci_status (*SCIC_SDS_PORT_EVENT_HANDLER_T)(struct scic_sds_port *, u32); + +typedef enum sci_status (*SCIC_SDS_PORT_FRAME_HANDLER_T)(struct scic_sds_port *, u32); + +typedef void (*SCIC_SDS_PORT_LINK_HANDLER_T)(struct scic_sds_port *, struct scic_sds_phy *); + +typedef enum sci_status (*SCIC_SDS_PORT_IO_REQUEST_HANDLER_T)( + struct scic_sds_port *, + struct scic_sds_remote_device *, + struct scic_sds_request *); + +struct scic_sds_port_state_handler { + struct sci_base_port_state_handler parent; + + SCIC_SDS_PORT_FRAME_HANDLER_T frame_handler; + SCIC_SDS_PORT_EVENT_HANDLER_T event_handler; + + SCIC_SDS_PORT_LINK_HANDLER_T link_up_handler; + SCIC_SDS_PORT_LINK_HANDLER_T link_down_handler; + + SCIC_SDS_PORT_IO_REQUEST_HANDLER_T start_io_handler; + SCIC_SDS_PORT_IO_REQUEST_HANDLER_T complete_io_handler; + +}; + +extern const struct sci_base_state scic_sds_port_state_table[]; +extern const struct sci_base_state scic_sds_port_ready_substate_table[]; + +extern struct scic_sds_port_state_handler scic_sds_port_state_handler_table[]; +extern struct scic_sds_port_state_handler scic_sds_port_ready_substate_handler_table[]; + +/** + * scic_sds_port_get_controller() - + * + * Helper macro to get the owning controller of this port + */ +#define scic_sds_port_get_controller(this_port) \ + ((this_port)->owning_controller) + +/** + * scic_sds_port_get_base_state_machine() - + * + * Helper macro to get the base state machine for this port + */ +#define scic_sds_port_get_base_state_machine(this_port) \ + (&(this_port)->parent.state_machine) + +/** + * scic_sds_port_set_base_state_handlers() - + * + * This macro will change the state handlers to those of the specified state id + */ +#define scic_sds_port_set_base_state_handlers(this_port, state_id) \ + scic_sds_port_set_state_handlers(\ + (this_port), &scic_sds_port_state_handler_table[(state_id)]) + +/** + * scic_sds_port_get_ready_substate_machine() - + * + * Helper macro to get the ready substate machine for this port + */ +#define scic_sds_port_get_ready_substate_machine(this_port) \ + (&(this_port)->ready_substate_machine) + +/** + * scic_sds_port_set_state_handlers() - + * + * Helper macro to set the port object state handlers + */ +#define scic_sds_port_set_state_handlers(this_port, handlers) \ + ((this_port)->state_handlers = (handlers)) + +/** + * scic_sds_port_get_index() - + * + * This macro returns the physical port index for this port object + */ +#define scic_sds_port_get_index(this_port) \ + ((this_port)->physical_port_index) + +/** + * scic_sds_port_increment_request_count() - + * + * Helper macro to increment the started request count + */ +#define scic_sds_port_increment_request_count(this_port) \ + ((this_port)->started_request_count++) + +#ifdef SCIC_DEBUG_ENABLED +/** + * scic_sds_port_decrement_request_count() - This method decrements the started + * io request count. The method will not decrment the started io request + * count below 0 and will log a debug message if this is attempted. + * + * + */ +void scic_sds_port_decrement_request_count( + struct scic_sds_port *this_port); +#else +/** + * scic_sds_port_decrement_request_count() - + * + * Helper macro to decrement the started io request count. The macro will not + * decrement the started io request count below 0. + */ +#define scic_sds_port_decrement_request_count(this_port) \ + (\ + (this_port)->started_request_count = (\ + ((this_port)->started_request_count == 0) ? \ + (this_port)->started_request_count : \ + ((this_port)->started_request_count - 1) \ + ) \ + ) +#endif + +/** + * scic_sds_port_write_phy_assignment() - + * + * Helper macro to write the phys port assignment + */ +#define scic_sds_port_write_phy_assignment(port, phy) \ + SCU_PCSPExCR_WRITE(\ + (port), \ + (phy)->phy_index, \ + (port)->physical_port_index \ + ) + +/** + * scic_sds_port_read_phy_assignment() - + * + * Helper macro to read the phys port assignment + */ +#define scic_sds_port_read_phy_assignment(port, phy) \ + SCU_PCSPExCR_READ(\ + (port), \ + (phy)->phy_index \ + ) + +#define scic_sds_port_active_phy(port, phy) \ + (((port)->active_phy_mask & (1 << (phy)->phy_index)) != 0) + +/* --------------------------------------------------------------------------- */ + + + + +/* --------------------------------------------------------------------------- */ + +/* --------------------------------------------------------------------------- */ + +void scic_sds_port_construct( + struct scic_sds_port *this_port, + u8 port_index, + struct scic_sds_controller *owning_controller); + +enum sci_status scic_sds_port_initialize( + struct scic_sds_port *this_port, + void *transport_layer_registers, + void *port_task_scheduler_registers, + void *port_configuration_regsiter, + void *viit_registers); + +/* --------------------------------------------------------------------------- */ + +enum sci_status scic_sds_port_add_phy( + struct scic_sds_port *this_port, + struct scic_sds_phy *the_phy); + +enum sci_status scic_sds_port_remove_phy( + struct scic_sds_port *this_port, + struct scic_sds_phy *the_phy); + +void scic_sds_port_set_direct_attached_device_id( + struct scic_sds_port *this_port, + u32 device_id); + +void scic_sds_port_activate_phy( + struct scic_sds_port *this_port, + struct scic_sds_phy *phy, + bool do_notify_user); + +void scic_sds_port_deactivate_phy( + struct scic_sds_port *this_port, + struct scic_sds_phy *phy, + bool do_notify_user); + + + +void scic_sds_port_general_link_up_handler( + struct scic_sds_port *this_port, + struct scic_sds_phy *the_phy, + bool do_notify_user); + +bool scic_sds_port_link_detected( + struct scic_sds_port *this_port, + struct scic_sds_phy *phy); + +void scic_sds_port_link_up( + struct scic_sds_port *this_port, + struct scic_sds_phy *phy); + +void scic_sds_port_link_down( + struct scic_sds_port *this_port, + struct scic_sds_phy *phy); + +/* --------------------------------------------------------------------------- */ + + +/* --------------------------------------------------------------------------- */ + +enum sci_status scic_sds_port_start_io( + struct scic_sds_port *this_port, + struct scic_sds_remote_device *the_device, + struct scic_sds_request *the_io_request); + +enum sci_status scic_sds_port_complete_io( + struct scic_sds_port *this_port, + struct scic_sds_remote_device *the_device, + struct scic_sds_request *the_io_request); + +/* --------------------------------------------------------------------------- */ + +void scic_sds_port_update_viit_entry( + struct scic_sds_port *this_port); + +/* --------------------------------------------------------------------------- */ + +enum sci_status scic_sds_port_default_start_handler( + struct sci_base_port *port); + + +enum sci_status scic_sds_port_default_destruct_handler( + struct sci_base_port *port); + +enum sci_status scic_sds_port_default_reset_handler( + struct sci_base_port *port, + u32 timeout); + + +enum sci_status scic_sds_port_default_remove_phy_handler( + struct sci_base_port *port, + struct sci_base_phy *phy); + +enum sci_status scic_sds_port_default_frame_handler( + struct scic_sds_port *port, + u32 frame_index); + +enum sci_status scic_sds_port_default_event_handler( + struct scic_sds_port *port, + u32 event_code); + +void scic_sds_port_default_link_up_handler( + struct scic_sds_port *this_port, + struct scic_sds_phy *phy); + +void scic_sds_port_default_link_down_handler( + struct scic_sds_port *this_port, + struct scic_sds_phy *phy); + +enum sci_status scic_sds_port_default_start_io_handler( + struct scic_sds_port *port, + struct scic_sds_remote_device *device, + struct scic_sds_request *io_request); + + +enum sci_sas_link_rate scic_sds_port_get_max_allowed_speed( + struct scic_sds_port *this_port); + +void scic_sds_port_broadcast_change_received( + struct scic_sds_port *this_port, + struct scic_sds_phy *this_phy); + +bool scic_sds_port_is_valid_phy_assignment( + struct scic_sds_port *this_port, + u32 phy_index); + +bool scic_sds_port_is_phy_mask_valid( + struct scic_sds_port *this_port, + u32 phy_mask); + +u32 scic_sds_port_get_phys( + struct scic_sds_port *this_port); + +void scic_sds_port_get_sas_address( + struct scic_sds_port *this_port, + struct sci_sas_address *sas_address); + +void scic_sds_port_get_attached_sas_address( + struct scic_sds_port *this_port, + struct sci_sas_address *sas_address); + +void scic_sds_port_get_attached_protocols( + struct scic_sds_port *this_port, + struct sci_sas_identify_address_frame_protocols *protocols); + +enum sci_status scic_sds_port_set_phy( + struct scic_sds_port *port, + struct scic_sds_phy *phy); + +enum sci_status scic_sds_port_clear_phy( + struct scic_sds_port *port, + struct scic_sds_phy *phy); + + + +#endif /* _SCIC_SDS_PORT_H_ */ |