diff options
| -rw-r--r-- | drivers/scsi/isci/Makefile | 4 | ||||
| -rw-r--r-- | drivers/scsi/isci/core/scic_config_parameters.h | 249 | ||||
| -rw-r--r-- | drivers/scsi/isci/core/scic_port.h | 97 | ||||
| -rw-r--r-- | drivers/scsi/isci/core/scic_sds_port.c | 2423 | ||||
| -rw-r--r-- | drivers/scsi/isci/core/scic_sds_port.h | 435 | ||||
| -rw-r--r-- | drivers/scsi/isci/core/scic_sds_port_configuration_agent.h | 107 | ||||
| -rw-r--r-- | drivers/scsi/isci/host.c | 1 | ||||
| -rw-r--r-- | drivers/scsi/isci/host.h | 29 | ||||
| -rw-r--r-- | drivers/scsi/isci/phy.c | 3 | ||||
| -rw-r--r-- | drivers/scsi/isci/phy.h | 1 | ||||
| -rw-r--r-- | drivers/scsi/isci/port.c | 2451 | ||||
| -rw-r--r-- | drivers/scsi/isci/port.h | 425 | ||||
| -rw-r--r-- | drivers/scsi/isci/port_config.c (renamed from drivers/scsi/isci/core/scic_sds_port_configuration_agent.c) | 1 | ||||
| -rw-r--r-- | drivers/scsi/isci/probe_roms.h | 124 | ||||
| -rw-r--r-- | drivers/scsi/isci/remote_device.c | 2 | ||||
| -rw-r--r-- | drivers/scsi/isci/remote_node_context.c | 1 | ||||
| -rw-r--r-- | drivers/scsi/isci/request.c | 1 |
17 files changed, 2929 insertions, 3425 deletions
diff --git a/drivers/scsi/isci/Makefile b/drivers/scsi/isci/Makefile index 2830a97a822a..48218ca908fe 100644 --- a/drivers/scsi/isci/Makefile +++ b/drivers/scsi/isci/Makefile @@ -1,4 +1,3 @@ -EXTRA_CFLAGS += -Idrivers/scsi/isci/core/ -Idrivers/scsi/isci/ obj-$(CONFIG_SCSI_ISCI) += isci.o isci-objs := init.o phy.o request.o sata.o \ remote_device.o port.o timers.o \ @@ -10,5 +9,4 @@ isci-objs := init.o phy.o request.o sata.o \ stp_request.o \ ssp_request.o \ smp_request.o \ - core/scic_sds_port.o \ - core/scic_sds_port_configuration_agent.o \ + port_config.o \ diff --git a/drivers/scsi/isci/core/scic_config_parameters.h b/drivers/scsi/isci/core/scic_config_parameters.h deleted file mode 100644 index 15e7744dbdcf..000000000000 --- a/drivers/scsi/isci/core/scic_config_parameters.h +++ /dev/null @@ -1,249 +0,0 @@ -/* - * 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_USER_PARAMETERS_H_ -#define _SCIC_SDS_USER_PARAMETERS_H_ - -#include "probe_roms.h" - -struct scic_sds_controller; - -/** - * - * - * SCIC_SDS_PARM_PHY_SPEED These constants define the speeds utilized for a - * phy/port. - */ -#define SCIC_SDS_PARM_NO_SPEED 0 - -/** - * - * - * This value of 1 indicates generation 1 (i.e. 1.5 Gb/s). - */ -#define SCIC_SDS_PARM_GEN1_SPEED 1 - -/** - * - * - * This value of 2 indicates generation 2 (i.e. 3.0 Gb/s). - */ -#define SCIC_SDS_PARM_GEN2_SPEED 2 - -/** - * - * - * This value of 3 indicates generation 3 (i.e. 6.0 Gb/s). - */ -#define SCIC_SDS_PARM_GEN3_SPEED 3 - -/** - * - * - * For range checks, the max speed generation - */ -#define SCIC_SDS_PARM_MAX_SPEED SCIC_SDS_PARM_GEN3_SPEED - -/** - * struct scic_sds_user_parameters - This structure delineates the various user - * parameters that can be changed by the core user. - * - * - */ -struct scic_sds_user_parameters { - struct sci_phy_user_params { - /** - * This field specifies the NOTIFY (ENABLE SPIN UP) primitive - * insertion frequency for this phy index. - */ - u32 notify_enable_spin_up_insertion_frequency; - - /** - * This method specifies the number of transmitted DWORDs within which - * to transmit a single ALIGN primitive. This value applies regardless - * of what type of device is attached or connection state. A value of - * 0 indicates that no ALIGN primitives will be inserted. - */ - u16 align_insertion_frequency; - - /** - * This method specifies the number of transmitted DWORDs within which - * to transmit 2 ALIGN primitives. This applies for SAS connections - * only. A minimum value of 3 is required for this field. - */ - u16 in_connection_align_insertion_frequency; - - /** - * This field indicates the maximum speed generation to be utilized - * by phys in the supplied port. - * - A value of 1 indicates generation 1 (i.e. 1.5 Gb/s). - * - A value of 2 indicates generation 2 (i.e. 3.0 Gb/s). - * - A value of 3 indicates generation 3 (i.e. 6.0 Gb/s). - */ - u8 max_speed_generation; - - } phys[SCI_MAX_PHYS]; - - /** - * This field specifies the maximum number of direct attached devices - * that can have power supplied to them simultaneously. - */ - u8 max_number_concurrent_device_spin_up; - - /** - * This field specifies the number of seconds to allow a phy to consume - * power before yielding to another phy. - * - */ - u8 phy_spin_up_delay_interval; - - /** - * These timer values specifies how long a link will remain open with no - * activity in increments of a microsecond, it can be in increments of - * 100 microseconds if the upper most bit is set. - * - */ - u16 stp_inactivity_timeout; - u16 ssp_inactivity_timeout; - - /** - * These timer values specifies how long a link will remain open in increments - * of 100 microseconds. - * - */ - u16 stp_max_occupancy_timeout; - u16 ssp_max_occupancy_timeout; - - /** - * This timer value specifies how long a link will remain open with no - * outbound traffic in increments of a microsecond. - * - */ - u8 no_outbound_task_timeout; - -}; - -/** - * This structure/union specifies the various different user parameter sets - * available. Each type is specific to a hardware controller version. - * - * union scic_user_parameters - */ -union scic_user_parameters { - /** - * This field specifies the user parameters specific to the - * Storage Controller Unit (SCU) Driver Standard (SDS) version - * 1. - */ - struct scic_sds_user_parameters sds1; - -}; - - -/** - * - * - * SCIC_SDS_OEM_PHY_MASK These constants define the valid values for phy_mask - */ - -/** - * - * - * This is the min value assignable to a port's phy mask - */ -#define SCIC_SDS_PARM_PHY_MASK_MIN 0x0 - -/** - * - * - * This is the max value assignable to a port's phy mask - */ -#define SCIC_SDS_PARM_PHY_MASK_MAX 0xF - -#define MAX_CONCURRENT_DEVICE_SPIN_UP_COUNT 4 - -/** - * This structure/union specifies the various different OEM parameter sets - * available. Each type is specific to a hardware controller version. - * - * union scic_oem_parameters - */ -union scic_oem_parameters { - /** - * This field specifies the OEM parameters specific to the - * Storage Controller Unit (SCU) Driver Standard (SDS) version - * 1. - */ - struct scic_sds_oem_params sds1; -}; - -int scic_oem_parameters_validate(struct scic_sds_oem_params *oem); - -/** - * scic_oem_parameters_get() - This method allows the user to retreive the OEM - * parameters utilized by the controller. - * @controller: This parameter specifies the controller on which to set the - * user parameters. - * @oem_parameters: This parameter specifies the OEM parameters object in which - * to write the core's OEM parameters. - * - */ -void scic_oem_parameters_get( - struct scic_sds_controller *controller, - union scic_oem_parameters *oem_parameters); - - -#endif /* _SCIC_SDS_USER_PARAMETERS_H_ */ - diff --git a/drivers/scsi/isci/core/scic_port.h b/drivers/scsi/isci/core/scic_port.h deleted file mode 100644 index 431dbd2093f3..000000000000 --- a/drivers/scsi/isci/core/scic_port.h +++ /dev/null @@ -1,97 +0,0 @@ -/* - * 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_PORT_H_ -#define _SCIC_PORT_H_ - -#include "isci.h" -#include "sas.h" -#include "phy.h" - -struct scic_sds_port; - -enum scic_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 scic_port_end_point_properties { - struct sci_sas_address sas_address; - struct scic_phy_proto protocols; -}; - -struct scic_port_properties { - u32 index; - struct scic_port_end_point_properties local; - struct scic_port_end_point_properties remote; - u32 phy_mask; -}; - -enum sci_status scic_port_get_properties( - struct scic_sds_port *port, - struct scic_port_properties *properties); - -enum sci_status scic_port_hard_reset( - struct scic_sds_port *port, - u32 reset_timeout); - -void scic_port_enable_broadcast_change_notification( - struct scic_sds_port *port); - -#endif /* _SCIC_PORT_H_ */ diff --git a/drivers/scsi/isci/core/scic_sds_port.c b/drivers/scsi/isci/core/scic_sds_port.c deleted file mode 100644 index 11b516a9a130..000000000000 --- a/drivers/scsi/isci/core/scic_sds_port.c +++ /dev/null @@ -1,2423 +0,0 @@ -/* - * 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. - */ - -#include "host.h" -#include "scic_port.h" -#include "scic_sds_port.h" -#include "remote_device.h" -#include "remote_node_context.h" -#include "registers.h" -#include "timers.h" -#include "scu_task_context.h" - -#define SCIC_SDS_PORT_MIN_TIMER_COUNT (SCI_MAX_PORTS) -#define SCIC_SDS_PORT_MAX_TIMER_COUNT (SCI_MAX_PORTS) - -#define SCIC_SDS_PORT_HARD_RESET_TIMEOUT (1000) -#define SCU_DUMMY_INDEX (0xFFFF) - - -/** - * - * @sci_port: This is the port object to which the phy is being assigned. - * @phy_index: This is the phy index that is being assigned to the port. - * - * This method will return a true value if the specified phy can be assigned to - * this port The following is a list of phys for each port that are allowed: - - * Port 0 - 3 2 1 0 - Port 1 - 1 - Port 2 - 3 2 - Port 3 - 3 This method - * doesn't preclude all configurations. It merely ensures that a phy is part - * of the allowable set of phy identifiers for that port. For example, one - * could assign phy 3 to port 0 and no other phys. Please refer to - * scic_sds_port_is_phy_mask_valid() for information regarding whether the - * phy_mask for a port can be supported. bool true if this is a valid phy - * assignment for the port false if this is not a valid phy assignment for the - * port - */ -bool scic_sds_port_is_valid_phy_assignment( - struct scic_sds_port *sci_port, - u32 phy_index) -{ - /* Initialize to invalid value. */ - u32 existing_phy_index = SCI_MAX_PHYS; - u32 index; - - if ((sci_port->physical_port_index == 1) && (phy_index != 1)) { - return false; - } - - if (sci_port->physical_port_index == 3 && phy_index != 3) { - return false; - } - - if ( - (sci_port->physical_port_index == 2) - && ((phy_index == 0) || (phy_index == 1)) - ) { - return false; - } - - for (index = 0; index < SCI_MAX_PHYS; index++) { - if ((sci_port->phy_table[index] != NULL) - && (index != phy_index)) { - existing_phy_index = index; - } - } - - /* - * Ensure that all of the phys in the port are capable of - * operating at the same maximum link rate. */ - if ( - (existing_phy_index < SCI_MAX_PHYS) - && (sci_port->owning_controller->user_parameters.sds1.phys[ - phy_index].max_speed_generation != - sci_port->owning_controller->user_parameters.sds1.phys[ - existing_phy_index].max_speed_generation) - ) - return false; - - return true; -} - -/** - * This method requests a list (mask) of the phys contained in the supplied SAS - * port. - * @sci_port: a handle corresponding to the SAS port for which to return the - * phy mask. - * - * Return a bit mask indicating which phys are a part of this port. Each bit - * corresponds to a phy identifier (e.g. bit 0 = phy id 0). - */ -static u32 scic_sds_port_get_phys(struct scic_sds_port *sci_port) -{ - u32 index; - u32 mask; - - mask = 0; - - for (index = 0; index < SCI_MAX_PHYS; index++) { - if (sci_port->phy_table[index] != NULL) { - mask |= (1 << index); - } - } - - return mask; -} - -/** - * - * @sci_port: This is the port object for which to determine if the phy mask - * can be supported. - * - * This method will return a true value if the port's phy mask can be supported - * by the SCU. The following is a list of valid PHY mask configurations for - * each port: - Port 0 - [[3 2] 1] 0 - Port 1 - [1] - Port 2 - [[3] 2] - * - Port 3 - [3] This method returns a boolean indication specifying if the - * phy mask can be supported. true if this is a valid phy assignment for the - * port false if this is not a valid phy assignment for the port - */ -static bool scic_sds_port_is_phy_mask_valid( - struct scic_sds_port *sci_port, - u32 phy_mask) -{ - if (sci_port->physical_port_index == 0) { - if (((phy_mask & 0x0F) == 0x0F) - || ((phy_mask & 0x03) == 0x03) - || ((phy_mask & 0x01) == 0x01) - || (phy_mask == 0)) - return true; - } else if (sci_port->physical_port_index == 1) { - if (((phy_mask & 0x02) == 0x02) - || (phy_mask == 0)) - return true; - } else if (sci_port->physical_port_index == 2) { - if (((phy_mask & 0x0C) == 0x0C) - || ((phy_mask & 0x04) == 0x04) - || (phy_mask == 0)) - return true; - } else if (sci_port->physical_port_index == 3) { - if (((phy_mask & 0x08) == 0x08) - || (phy_mask == 0)) - return true; - } - - return false; -} - -/** - * - * @sci_port: This parameter specifies the port from which to return a - * connected phy. - * - * This method retrieves a currently active (i.e. connected) phy contained in - * the port. Currently, the lowest order phy that is connected is returned. - * This method returns a pointer to a SCIS_SDS_PHY object. NULL This value is - * returned if there are no currently active (i.e. connected to a remote end - * point) phys contained in the port. All other values specify a struct scic_sds_phy - * object that is active in the port. - */ -static struct scic_sds_phy *scic_sds_port_get_a_connected_phy( - struct scic_sds_port *sci_port - ) { - u32 index; - struct scic_sds_phy *phy; - - for (index = 0; index < SCI_MAX_PHYS; index++) { - /* - * Ensure that the phy is both part of the port and currently - * connected to the remote end-point. */ - phy = sci_port->phy_table[index]; - if ( - (phy != NULL) - && scic_sds_port_active_phy(sci_port, phy) - ) { - return phy; - } - } - - return NULL; -} - -/** - * scic_sds_port_set_phy() - - * @out]: port The port object to which the phy assignement is being made. - * @out]: phy The phy which is being assigned to the port. - * - * This method attempts to make the assignment of the phy to the port. If - * successful the phy is assigned to the ports phy table. bool true if the phy - * assignment can be made. false if the phy assignement can not be made. This - * is a functional test that only fails if the phy is currently assigned to a - * different port. - */ -static enum sci_status scic_sds_port_set_phy( - struct scic_sds_port *port, - struct scic_sds_phy *phy) -{ - /* - * Check to see if we can add this phy to a port - * that means that the phy is not part of a port and that the port does - * not already have a phy assinged to the phy index. */ - if ( - (port->phy_table[phy->phy_index] == NULL) - && (scic_sds_phy_get_port(phy) == NULL) - && scic_sds_port_is_valid_phy_assignment(port, phy->phy_index) - ) { - /* - * Phy is being added in the stopped state so we are in MPC mode - * make logical port index = physical port index */ - port->logical_port_index = port->physical_port_index; - port->phy_table[phy->phy_index] = phy; - scic_sds_phy_set_port(phy, port); - - return SCI_SUCCESS; - } - - return SCI_FAILURE; -} - -/** - * scic_sds_port_clear_phy() - - * @out]: port The port from which the phy is being cleared. - * @out]: phy The phy being cleared from the port. - * - * This method will clear the phy assigned to this port. This method fails if - * this phy is not currently assinged to this port. bool true if the phy is - * removed from the port. false if this phy is not assined to this port. - */ -static enum sci_status scic_sds_port_clear_phy( - struct scic_sds_port *port, - struct scic_sds_phy *phy) -{ - /* Make sure that this phy is part of this port */ - if (port->phy_table[phy->phy_index] == phy && - scic_sds_phy_get_port(phy) == port) { - struct scic_sds_controller *scic = port->owning_controller; - struct isci_host *ihost = scic_to_ihost(scic); - - /* Yep it is assigned to this port so remove it */ - scic_sds_phy_set_port(phy, &ihost->ports[SCI_MAX_PORTS].sci); - port->phy_table[phy->phy_index] = NULL; - return SCI_SUCCESS; - } - - return SCI_FAILURE; -} - -/** - * scic_sds_port_add_phy() - - * @sci_port: This parameter specifies the port in which the phy will be added. - * @sci_phy: This parameter is the phy which is to be added to the port. - * - * This method will add a PHY to the selected port. This method returns an - * enum sci_status. SCI_SUCCESS the phy has been added to the port. Any other status - * is failre to add the phy to the port. - */ -enum sci_status scic_sds_port_add_phy( - struct scic_sds_port *sci_port, - struct scic_sds_phy *sci_phy) -{ - return sci_port->state_handlers->add_phy_handler( - sci_port, sci_phy); -} - - -/** - * scic_sds_port_remove_phy() - - * @sci_port: This parameter specifies the port in which the phy will be added. - * @sci_phy: This parameter is the phy which is to be added to the port. - * - * This method will remove the PHY from the selected PORT. This method returns - * an enum sci_status. SCI_SUCCESS the phy has been removed from the port. Any other - * status is failre to add the phy to the port. - */ -enum sci_status scic_sds_port_remove_phy( - struct scic_sds_port *sci_port, - struct scic_sds_phy *sci_phy) -{ - return sci_port->state_handlers->remove_phy_handler( - sci_port, sci_phy); -} - -/** - * This method requests the SAS address for the supplied SAS port from the SCI - * implementation. - * @sci_port: a handle corresponding to the SAS port for which to return the - * SAS address. - * @sas_address: This parameter specifies a pointer to a SAS address structure - * into which the core will copy the SAS address for the port. - * - */ -void scic_sds_port_get_sas_address( - struct scic_sds_port *sci_port, - struct sci_sas_address *sas_address) -{ - u32 index; - - sas_address->high = 0; - sas_address->low = 0; - - for (index = 0; index < SCI_MAX_PHYS; index++) { - if (sci_port->phy_table[index] != NULL) { - scic_sds_phy_get_sas_address(sci_port->phy_table[index], sas_address); - } - } -} - -/* - * This function will indicate which protocols are supported by this port. - * @sci_port: a handle corresponding to the SAS port for which to return the - * supported protocols. - * @protocols: This parameter specifies a pointer to a data structure - * which the core will copy the protocol values for the port from the - * transmit_identification register. - */ -static void -scic_sds_port_get_protocols(struct scic_sds_port *sci_port, - struct scic_phy_proto *protocols) -{ - u8 index; - - protocols->all = 0; - - for (index = 0; index < SCI_MAX_PHYS; index++) { - if (sci_port->phy_table[index] != NULL) { - scic_sds_phy_get_protocols(sci_port->phy_table[index], - protocols); - } - } -} - -/* - * This function requests the SAS address for the device directly attached to - * this SAS port. - * @sci_port: a handle corresponding to the SAS port for which to return the - * SAS address. - * @sas_address: This parameter specifies a pointer to a SAS address structure - * into which the core will copy the SAS address for the device directly - * attached to the port. - * - */ -void scic_sds_port_get_attached_sas_address( - struct scic_sds_port *sci_port, - struct sci_sas_address *sas_address) -{ - struct scic_sds_phy *sci_phy; - - /* - * Ensure that the phy is both part of the port and currently - * connected to the remote end-point. - */ - sci_phy = scic_sds_port_get_a_connected_phy(sci_port); - if (sci_phy) { - if (sci_phy->protocol != SCIC_SDS_PHY_PROTOCOL_SATA) { - scic_sds_phy_get_attached_sas_address(sci_phy, - sas_address); - } else { - scic_sds_phy_get_sas_address(sci_phy, sas_address); - sas_address->low += sci_phy->phy_index; - } - } else { - sas_address->high = 0; - sas_address->low = 0; - } -} - -/** - * scic_sds_port_construct_dummy_rnc() - create dummy rnc for si workaround - * - * @sci_port: logical port on which we need to create the remote node context - * @rni: remote node index for this remote node context. - * - * This routine will construct a dummy remote node context data structure - * This structure will be posted to the hardware to work around a scheduler - * error in the hardware. - */ -static void scic_sds_port_construct_dummy_rnc(struct scic_sds_port *sci_port, u16 rni) -{ - union scu_remote_node_context *rnc; - - rnc = &sci_port->owning_controller->remote_node_context_table[rni]; - - memset(rnc, 0, sizeof(union scu_remote_node_context)); - - rnc->ssp.remote_sas_address_hi = 0; - rnc->ssp.remote_sas_address_lo = 0; - - rnc->ssp.remote_node_index = rni; - rnc->ssp.remote_node_port_width = 1; - rnc->ssp.logical_port_index = sci_port->physical_port_index; - - rnc->ssp.nexus_loss_timer_enable = false; - rnc->ssp.check_bit = false; - rnc->ssp.is_valid = true; - rnc->ssp.is_remote_node_context = true; - rnc->ssp.function_number = 0; - rnc->ssp.arbitration_wait_time = 0; -} - -/** - * scic_sds_port_construct_dummy_task() - create dummy task for si workaround - * @sci_port The logical port on which we need to create the - * remote node context. - * context. - * @tci The remote node index for this remote node context. - * - * This routine will construct a dummy task context data structure. This - * structure will be posted to the hardwre to work around a scheduler error - * in the hardware. - * - */ -static void scic_sds_port_construct_dummy_task(struct scic_sds_port *sci_port, u16 tci) -{ - struct scu_task_context *task_context; - - task_context = scic_sds_controller_get_task_context_buffer(sci_port->owning_controller, tci); - - memset(task_context, 0, sizeof(struct scu_task_context)); - - task_context->abort = 0; - task_context->priority = 0; - task_context->initiator_request = 1; - task_context->connection_rate = 1; - task_context->protocol_engine_index = 0; - task_context->logical_port_index = sci_port->physical_port_index; - task_context->protocol_type = SCU_TASK_CONTEXT_PROTOCOL_SSP; - task_context->task_index = scic_sds_io_tag_get_index(tci); - task_context->valid = SCU_TASK_CONTEXT_VALID; - task_context->context_type = SCU_TASK_CONTEXT_TYPE; - - task_context->remote_node_index = sci_port->reserved_rni; - task_context->command_code = 0; - - task_context->link_layer_control = 0; - task_context->do_not_dma_ssp_good_response = 1; - task_context->strict_ordering = 0; - task_context->control_frame = 0; - task_context->timeout_enable = 0; - task_context->block_guard_enable = 0; - - task_context->address_modifier = 0; - - task_context->task_phase = 0x01; -} - -static void scic_sds_port_destroy_dummy_resources(struct scic_sds_port *sci_port) -{ - struct scic_sds_controller *scic = sci_port->owning_controller; - - if (sci_port->reserved_tci != SCU_DUMMY_INDEX) - scic_controller_free_io_tag(scic, sci_port->reserved_tci); - - if (sci_port->reserved_rni != SCU_DUMMY_INDEX) - scic_sds_remote_node_table_release_remote_node_index(&scic->available_remote_nodes, - 1, sci_port->reserved_rni); - - sci_port->reserved_rni = SCU_DUMMY_INDEX; - sci_port->reserved_tci = SCU_DUMMY_INDEX; -} - -/** - * This method performs initialization of the supplied port. Initialization - * includes: - state machine initialization - member variable initialization - * - configuring the phy_mask - * @sci_port: - * @transport_layer_registers: - * @port_task_scheduler_registers: - * @port_configuration_regsiter: - * - * enum sci_status SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION This value is returned - * if the phy being added to the port - */ -enum sci_status scic_sds_port_initialize( - struct scic_sds_port *sci_port, - void __iomem *port_task_scheduler_registers, - void __iomem *port_configuration_regsiter, - void __iomem *viit_registers) -{ - sci_port->port_task_scheduler_registers = port_task_scheduler_registers; - sci_port->port_pe_configuration_register = port_configuration_regsiter; - sci_port->viit_registers = viit_registers; - - return SCI_SUCCESS; -} - -/** - * scic_port_get_properties() - This method simply returns the properties - * regarding the port, such as: physical index, protocols, sas address, etc. - * @port: this parameter specifies the port for which to retrieve the physical - * index. - * @properties: This parameter specifies the properties structure into which to - * copy the requested information. - * - * Indicate if the user specified a valid port. SCI_SUCCESS This value is - * returned if the specified port was valid. SCI_FAILURE_INVALID_PORT This - * value is returned if the specified port is not valid. When this value is - * returned, no data is copied to the properties output parameter. - */ -enum sci_status scic_port_get_properties( - struct scic_sds_port *port, - struct scic_port_properties *prop) -{ - if ((port == NULL) || - (port->logical_port_index == SCIC_SDS_DUMMY_PORT)) - return SCI_FAILURE_INVALID_PORT; - - prop->index = port->logical_port_index; - prop->phy_mask = scic_sds_port_get_phys(port); - scic_sds_port_get_sas_address(port, &prop->local.sas_address); - scic_sds_port_get_protocols(port, &prop->local.protocols); - scic_sds_port_get_attached_sas_address(port, &prop->remote.sas_address); - - return SCI_SUCCESS; -} - -/** - * scic_port_hard_reset() - perform port hard reset - * @port: a handle corresponding to the SAS port to be hard reset. - * @reset_timeout: This parameter specifies the number of milliseconds in which - * the port reset operation should complete. - * - * The SCI User callback in scic_user_callbacks_t will only be called once for - * each phy in the SAS Port at completion of the hard reset sequence. Return a - * status indicating whether the hard reset started successfully. SCI_SUCCESS - * This value is returned if the hard reset operation started successfully. - */ -enum sci_status scic_port_hard_reset( - struct scic_sds_port *port, - u32 reset_timeout) -{ - return port->state_handlers->reset_handler( - port, reset_timeout); -} - -/** - * This method assigns the direct attached device ID for this port. - * - * @param[in] sci_port The port for which the direct attached device id is to - * be assigned. - * @param[in] device_id The direct attached device ID to assign to the port. - * This will be the RNi for the device - */ -void scic_sds_port_setup_transports( - struct scic_sds_port *sci_port, - u32 device_id) -{ - u8 index; - - for (index = 0; index < SCI_MAX_PHYS; index++) { - if (sci_port->active_phy_mask & (1 << index)) - scic_sds_phy_setup_transport(sci_port->phy_table[index], device_id); - } -} - -/** - * - * @sci_port: This is the port on which the phy should be enabled. - * @sci_phy: This is the specific phy which to enable. - * @do_notify_user: This parameter specifies whether to inform the user (via - * scic_cb_port_link_up()) as to the fact that a new phy as become ready. - * - * This function will activate the phy in the port. - * Activation includes: - adding - * the phy to the port - enabling the Protocol Engine in the silicon. - - * notifying the user that the link is up. none - */ -static void scic_sds_port_activate_phy(struct scic_sds_port *sci_port, - struct scic_sds_phy *sci_phy, - bool do_notify_user) -{ - struct scic_sds_controller *scic = sci_port->owning_controller; - struct isci_host *ihost = scic_to_ihost(scic); - - if (sci_phy->protocol != SCIC_SDS_PHY_PROTOCOL_SATA) - scic_sds_phy_resume(sci_phy); - - sci_port->active_phy_mask |= 1 << sci_phy->phy_index; - - scic_sds_controller_clear_invalid_phy(scic, sci_phy); - - if (do_notify_user == true) - isci_port_link_up(ihost, sci_port, sci_phy); -} - -void scic_sds_port_deactivate_phy(struct scic_sds_port *sci_port, - struct scic_sds_phy *sci_phy, - bool do_notify_user) -{ - struct scic_sds_controller *scic = scic_sds_port_get_controller(sci_port); - struct isci_port *iport = sci_port_to_iport(sci_port); - struct isci_host *ihost = scic_to_ihost(scic); - struct isci_phy *iphy = sci_phy_to_iphy(sci_phy); - - sci_port->active_phy_mask &= ~(1 << sci_phy->phy_index); - - sci_phy->max_negotiated_speed = SAS_LINK_RATE_UNKNOWN; - - /* Re-assign the phy back to the LP as if it were a narrow port */ - writel(sci_phy->phy_index, - &sci_port->port_pe_configuration_register[sci_phy->phy_index]); - - if (do_notify_user == true) - isci_port_link_down(ihost, iphy, iport); -} - -/** - * - * @sci_port: This is the port on which the phy should be disabled. - * @sci_phy: This is the specific phy which to disabled. - * - * This function will disable the phy and report that the phy is not valid for - * this port object. None - */ -static void scic_sds_port_invalid_link_up(struct scic_sds_port *sci_port, - struct scic_sds_phy *sci_phy) -{ - struct scic_sds_controller *scic = sci_port->owning_controller; - - /* - * Check to see if we have alreay reported this link as bad and if - * not go ahead and tell the SCI_USER that we have discovered an - * invalid link. - */ - if ((scic->invalid_phy_mask & (1 << sci_phy->phy_index)) == 0) { - scic_sds_controller_set_invalid_phy(scic, sci_phy); - dev_warn(&scic_to_ihost(scic)->pdev->dev, "Invalid link up!\n"); - } -} - -/** - * scic_sds_port_general_link_up_handler - phy can be assigned to port? - * @sci_port: scic_sds_port object for which has a phy that has gone link up. - * @sci_phy: This is the struct scic_sds_phy object that has gone link up. - * @do_notify_user: This parameter specifies whether to inform the user (via - * scic_cb_port_link_up()) as to the fact that a new phy as become ready. - * - * Determine if this phy can be assigned to this - * port . If the phy is not a valid PHY for - * this port then the function will notify the user. A PHY can only be - * part of a port if it's attached SAS ADDRESS is the same as all other PHYs in - * the same port. none - */ -static void scic_sds_port_general_link_up_handler(struct scic_sds_port *sci_port, - struct scic_sds_phy *sci_phy, - bool do_notify_user) -{ - struct sci_sas_address port_sas_address; - struct sci_sas_address phy_sas_address; - - scic_sds_port_get_attached_sas_address(sci_port, &port_sas_address); - scic_sds_phy_get_attached_sas_address(sci_phy, &phy_sas_address); - - /* If the SAS address of the new phy matches the SAS address of - * other phys in the port OR this is the first phy in the port, - * then activate the phy and allow it to be used for operations - * in this port. - */ - if ((phy_sas_address.high == port_sas_address.high && - phy_sas_address.low == port_sas_address.low) || - sci_port->active_phy_mask == 0) { - struct sci_base_state_machine *sm = &sci_port->state_machine; - - scic_sds_port_activate_phy(sci_port, sci_phy, do_notify_user); - if (sm->current_state_id == SCI_BASE_PORT_STATE_RESETTING) - sci_base_state_machine_change_state(sm, SCI_BASE_PORT_STATE_READY); - } else - scic_sds_port_invalid_link_up(sci_port, sci_phy); -} - - - -/** - * This method returns false if the port only has a single phy object assigned. - * If there are no phys or more than one phy then the method will return - * true. - * @sci_port: The port for which the wide port condition is to be checked. - * - * bool true Is returned if this is a wide ported port. false Is returned if - * this is a narrow port. - */ -static bool scic_sds_port_is_wide(struct scic_sds_port *sci_port) -{ - u32 index; - u32 phy_count = 0; - - for (index = 0; index < SCI_MAX_PHYS; index++) { - if (sci_port->phy_table[index] != NULL) { - phy_count++; - } - } - - return phy_count != 1; -} - -/** - * This method is called by the PHY object when the link is detected. if the - * port wants the PHY to continue on to the link up state then the port - * layer must return true. If the port object returns false the phy object - * must halt its attempt to go link up. - * @sci_port: The port associated with the phy object. - * @sci_phy: The phy object that is trying to go link up. - * - * true if the phy object can continue to the link up condition. true Is - * returned if this phy can continue to the ready state. false Is returned if - * can not continue on to the ready state. This notification is in place for - * wide ports and direct attached phys. Since there are no wide ported SATA - * devices this could become an invalid port configuration. - */ -bool scic_sds_port_link_detected( - struct scic_sds_port *sci_port, - struct scic_sds_phy *sci_phy) -{ - if ((sci_port->logical_port_index != SCIC_SDS_DUMMY_PORT) && - (sci_phy->protocol == SCIC_SDS_PHY_PROTOCOL_SATA) && - scic_sds_port_is_wide(sci_port)) { - scic_sds_port_invalid_link_up(sci_port, sci_phy); - - return false; - } - - return true; -} - -/** - * This method is the entry point for the phy to inform the port that it is now - * in a ready state - * @sci_port: - * - * - */ -void scic_sds_port_link_up( - struct scic_sds_port *sci_port, - struct scic_sds_phy *sci_phy) -{ - sci_phy->is_in_link_training = false; - - sci_port->state_handlers->link_up_handler(sci_port, sci_phy); -} - -/** - * This method is the entry point for the phy to inform the port that it is no - * longer in a ready state - * @sci_port: - * - * - */ -void scic_sds_port_link_down( - struct scic_sds_port *sci_port, - struct scic_sds_phy *sci_phy) -{ - sci_port->state_handlers->link_down_handler(sci_port, sci_phy); -} - -/** - * This method is called to start an IO request on this port. - * @sci_port: - * @sci_dev: - * @sci_req: - * - * enum sci_status - */ -enum sci_status scic_sds_port_start_io( - struct scic_sds_port *sci_port, - struct scic_sds_remote_device *sci_dev, - struct scic_sds_request *sci_req) -{ - return sci_port->state_handlers->start_io_handler( - sci_port, sci_dev, sci_req); -} - -/** - * This method is called to complete an IO request to the port. - * @sci_port: - * @sci_dev: - * @sci_req: - * - * enum sci_status - */ -enum sci_status scic_sds_port_complete_io( - struct scic_sds_port *sci_port, - struct scic_sds_remote_device *sci_dev, - struct scic_sds_request *sci_req) -{ - return sci_port->state_handlers->complete_io_handler( - sci_port, sci_dev, sci_req); -} - -/** - * This method is provided to timeout requests for port operations. Mostly its - * for the port reset operation. - * - * - */ -static void scic_sds_port_timeout_handler(void *port) -{ - struct scic_sds_port *sci_port = port; - u32 current_state; - - current_state = sci_base_state_machine_get_state( - &sci_port->state_machine); - - if (current_state == SCI_BASE_PORT_STATE_RESETTING) { - /* - * if the port is still in the resetting state then the - * timeout fired before the reset completed. - */ - sci_base_state_machine_change_state( - &sci_port->state_machine, - SCI_BASE_PORT_STATE_FAILED); - } else if (current_state == SCI_BASE_PORT_STATE_STOPPED) { - /* - * if the port is stopped then the start request failed - * In this case stay in the stopped state. - */ - dev_err(sciport_to_dev(sci_port), - "%s: SCIC Port 0x%p failed to stop before tiemout.\n", - __func__, - sci_port); - } else if (current_state == SCI_BASE_PORT_STATE_STOPPING) { - /* - * if the port is still stopping then the stop has not - * completed - */ - isci_port_stop_complete( - scic_sds_port_get_controller(sci_port), - sci_port, - SCI_FAILURE_TIMEOUT); - } else { - /* - * The port is in the ready state and we have a timer - * reporting a timeout this should not happen. - */ - dev_err(sciport_to_dev(sci_port), - "%s: SCIC Port 0x%p is processing a timeout operation " - "in state %d.\n", - __func__, - sci_port, - current_state); - } -} - -/* --------------------------------------------------------------------------- */ - -/** - * This function updates the hardwares VIIT entry for this port. - * - * - */ -static void scic_sds_port_update_viit_entry(struct scic_sds_port *sci_port) -{ - struct sci_sas_address sas_address; - - scic_sds_port_get_sas_address(sci_port, &sas_address); - - writel(sas_address.high, - &sci_port->viit_registers->initiator_sas_address_hi); - writel(sas_address.low, - &sci_port->viit_registers->initiator_sas_address_lo); - - /* This value get cleared just in case its not already cleared */ - writel(0, &sci_port->viit_registers->reserved); - - /* We are required to update the status register last */ - writel(SCU_VIIT_ENTRY_ID_VIIT | - SCU_VIIT_IPPT_INITIATOR | - ((1 << sci_port->physical_port_index) << SCU_VIIT_ENTRY_LPVIE_SHIFT) | - SCU_VIIT_STATUS_ALL_VALID, - &sci_port->viit_registers->status); -} - -/** - * This method returns the maximum allowed speed for data transfers on this - * port. This maximum allowed speed evaluates to the maximum speed of the - * slowest phy in the port. - * @sci_port: This parameter specifies the port for which to retrieve the - * maximum allowed speed. - * - * This method returns the maximum negotiated speed of the slowest phy in the - * port. - */ -enum sas_linkrate scic_sds_port_get_max_allowed_speed( - struct scic_sds_port *sci_port) -{ - u16 index; - enum sas_linkrate max_allowed_speed = SAS_LINK_RATE_6_0_GBPS; - struct scic_sds_phy *phy = NULL; - - /* - * Loop through all of the phys in this port and find the phy with the - * lowest maximum link rate. */ - for (index = 0; index < SCI_MAX_PHYS; index++) { - phy = sci_port->phy_table[index]; - if ( - (phy != NULL) - && (scic_sds_port_active_phy(sci_port, phy) == true) - && (phy->max_negotiated_speed < max_allowed_speed) - ) - max_allowed_speed = phy->max_negotiated_speed; - } - - return max_allowed_speed; -} - - -/** - * This method passes the event to core user. - * @sci_port: The port that a BCN happens. - * @sci_phy: The phy that receives BCN. - * - */ -void scic_sds_port_broadcast_change_received( - struct scic_sds_port *sci_port, - struct scic_sds_phy *sci_phy) -{ - struct scic_sds_controller *scic = sci_port->owning_controller; - struct isci_host *ihost = scic_to_ihost(scic); - - /* notify the user. */ - isci_port_bc_change_received(ihost, sci_port, sci_phy); -} - - -/** - * This API methhod enables the broadcast change notification from underneath - * hardware. - * @sci_port: The port that a BCN had been disabled from. - * - */ -void scic_port_enable_broadcast_change_notification( - struct scic_sds_port *port) -{ - struct scic_sds_phy *phy; - u32 register_value; - u8 index; - - /* Loop through all of the phys to enable BCN. */ - for (index = 0; index < SCI_MAX_PHYS; index++) { - phy = port->phy_table[index]; - if (phy != NULL) { - register_value = - readl(&phy->link_layer_registers->link_layer_control); - - /* clear the bit by writing 1. */ - writel(register_value, - &phy->link_layer_registers->link_layer_control); - } - } -} - -/* - * **************************************************************************** - * * READY SUBSTATE HANDLERS - * **************************************************************************** */ - -/* - * This method is the general ready state stop handler for the struct scic_sds_port - * object. This function will transition the ready substate machine to its - * final state. enum sci_status SCI_SUCCESS - */ -static enum sci_status scic_sds_port_ready_substate_stop_handler( - struct scic_sds_port *port) -{ - sci_base_state_machine_change_state( - &port->state_machine, - SCI_BASE_PORT_STATE_STOPPING - ); - - return SCI_SUCCESS; -} - -/* - * This method is the general ready substate complete io handler for the - * struct scic_sds_port object. This function decrments the outstanding request count - * for this port object. enum sci_status SCI_SUCCESS - */ -static enum sci_status scic_sds_port_ready_substate_complete_io_handler( - struct scic_sds_port *port, - struct scic_sds_remote_device *device, - struct scic_sds_request *io_request) -{ - scic_sds_port_decrement_request_count(port); - - return SCI_SUCCESS; -} - -static enum sci_status scic_sds_port_ready_substate_add_phy_handler( - struct scic_sds_port *port, - struct scic_sds_phy *phy) -{ - enum sci_status status; - - status = scic_sds_port_set_phy(port, phy); - - if (status == SCI_SUCCESS) { - scic_sds_port_general_link_up_handler(port, phy, true); - - port->not_ready_reason = SCIC_PORT_NOT_READY_RECONFIGURING; - - sci_base_state_machine_change_state( - &port->ready_substate_machine, - SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING - ); - } - - return status; -} - - -static enum sci_status scic_sds_port_ready_substate_remove_phy_handler( - struct scic_sds_port *port, - struct scic_sds_phy *phy) -{ - enum sci_status status; - - status = scic_sds_port_clear_phy(port, phy); - - if (status == SCI_SUCCESS) { - scic_sds_port_deactivate_phy(port, phy, true); - - port->not_ready_reason = SCIC_PORT_NOT_READY_RECONFIGURING; - - sci_base_state_machine_change_state( - &port->ready_substate_machine, - SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING - ); - } - - return status; -} - -/* - * **************************************************************************** - * * READY SUBSTATE WAITING HANDLERS - * **************************************************************************** */ - -/** - * - * @sci_port: This is the struct scic_sds_port object that which has a phy that has - * gone link up. - * @sci_phy: This is the struct scic_sds_phy object that has gone link up. - * - * This method is the ready waiting substate link up handler for the - * struct scic_sds_port object. This methos will report the link up condition for - * this port and will transition to the ready operational substate. none - */ -static void scic_sds_port_ready_waiting_substate_link_up_handler( - struct scic_sds_port *sci_port, - struct scic_sds_phy *sci_phy) -{ - /* - * Since this is the first phy going link up for the port we can just enable - * it and continue. */ - scic_sds_port_activate_phy(sci_port, sci_phy, true); - - sci_base_state_machine_change_state( - &sci_port->ready_substate_machine, - SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL - ); -} - -/* - * This method is the ready waiting substate start io handler for the - * struct scic_sds_port object. The port object can not accept new requests so the - * request is failed. enum sci_status SCI_FAILURE_INVALID_STATE - */ -static enum sci_status scic_sds_port_ready_waiting_substate_start_io_handler( - struct scic_sds_port *port, - struct scic_sds_remote_device *device, - struct scic_sds_request *io_request) -{ - return SCI_FAILURE_INVALID_STATE; -} - -/* - * **************************************************************************** - * * READY SUBSTATE OPERATIONAL HANDLERS - * **************************************************************************** */ - -/* - * This method will casue the port to reset. enum sci_status SCI_SUCCESS - */ -static enum -sci_status scic_sds_port_ready_operational_substate_reset_handler( - struct scic_sds_port *port, - u32 timeout) -{ - enum sci_status status = SCI_FAILURE_INVALID_PHY; - u32 phy_index; - struct scic_sds_phy *selected_phy = NULL; - - - /* Select a phy on which we can send the hard reset request. */ - for (phy_index = 0; - (phy_index < SCI_MAX_PHYS) && (selected_phy == NULL); - phy_index++) { - selected_phy = port->phy_table[phy_index]; - - if ((selected_phy != NULL) && - !scic_sds_port_active_phy(port, selected_phy)) { - /* - * We found a phy but it is not ready select - * different phy - */ - selected_phy = NULL; - } - } - - /* If we have a phy then go ahead and start the reset procedure */ - if (selected_phy != NULL) { - status = scic_sds_phy_reset(selected_phy); - - if (status == SCI_SUCCESS) { - isci_timer_start(port->timer_handle, timeout); - port->not_ready_reason = - SCIC_PORT_NOT_READY_HARD_RESET_REQUESTED; - - sci_base_state_machine_change_state( - &port->state_machine, - SCI_BASE_PORT_STATE_RESETTING); - } - } - - return status; -} - -/** - * scic_sds_port_ready_operational_substate_link_up_handler() - - * @sci_port: This is the struct scic_sds_port object that which has a phy that has - * gone link up. - * @sci_phy: This is the struct scic_sds_phy object that has gone link up. - * - * This method is the ready operational substate link up handler for the - * struct scic_sds_port object. This function notifies the SCI User that the phy has - * gone link up. none - */ -static void scic_sds_port_ready_operational_substate_link_up_handler( - struct scic_sds_port *sci_port, - struct scic_sds_phy *sci_phy) -{ - scic_sds_port_general_link_up_handler(sci_port, sci_phy, true); -} - -/** - * scic_sds_port_ready_operational_substate_link_down_handler() - - * @sci_port: This is the struct scic_sds_port object that which has a phy that has - * gone link down. - * @sci_phy: This is the struct scic_sds_phy object that has gone link down. - * - * This method is the ready operational substate link down handler for the - * struct scic_sds_port object. This function notifies the SCI User that the phy has - * gone link down and if this is the last phy in the port the port will change - * state to the ready waiting substate. none - */ -static void scic_sds_port_ready_operational_substate_link_down_handler( - struct scic_sds_port *sci_port, - struct scic_sds_phy *sci_phy) -{ - scic_sds_port_deactivate_phy(sci_port, sci_phy, true); - - /* - * If there are no active phys left in the port, then transition - * the port to the WAITING state until such time as a phy goes - * link up. */ - if (sci_port->active_phy_mask == 0) - sci_base_state_machine_change_state(&sci_port->ready_substate_machine, - SCIC_SDS_PORT_READY_SUBSTATE_WAITING); -} - -/* - * This method is the ready operational substate start io handler for the - * struct scic_sds_port object. This function incremetns the outstanding request - * count for this port object. enum sci_status SCI_SUCCESS - */ -static enum sci_status scic_sds_port_ready_operational_substate_start_io_handler( - struct scic_sds_port *port, - struct scic_sds_remote_device *device, - struct scic_sds_request *io_request) -{ - port->started_request_count++; - return SCI_SUCCESS; -} - -/* - * **************************************************************************** - * * READY SUBSTATE OPERATIONAL HANDLERS - * **************************************************************************** */ - -/* - * This is the default method for a port add phy request. It will report a - * warning and exit. enum sci_status SCI_FAILURE_INVALID_STATE - */ -static enum sci_status scic_sds_port_ready_configuring_substate_add_phy_handler( - struct scic_sds_port *port, - struct scic_sds_phy *phy) -{ - enum sci_status status; - - status = scic_sds_port_set_phy(port, phy); - - if (status == SCI_SUCCESS) { - scic_sds_port_general_link_up_handler(port, phy, true); - - /* - * Re-enter the configuring state since this may be the last phy in - * the port. */ - sci_base_state_machine_change_state( - &port->ready_substate_machine, - SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING - ); - } - - return status; -} - -/* - * This is the default method for a port remove phy request. It will report a - * warning and exit. enum sci_status SCI_FAILURE_INVALID_STATE - */ -static enum sci_status scic_sds_port_ready_configuring_substate_remove_phy_handler( - struct scic_sds_port *port, - struct scic_sds_phy *phy) -{ - enum sci_status status; - - status = scic_sds_port_clear_phy(port, phy); - - if (status == SCI_SUCCESS) { - scic_sds_port_deactivate_phy(port, phy, true); - - /* - * Re-enter the configuring state since this may be the last phy in - * the port. */ - sci_base_state_machine_change_state( - &port->ready_substate_machine, - SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING - ); - } - - return status; -} - -/** - * scic_sds_port_ready_configuring_substate_complete_io_handler() - - * @port: This is the port that is being requested to complete the io request. - * @device: This is the device on which the io is completing. - * - * This method will decrement the outstanding request count for this port. If - * the request count goes to 0 then the port can be reprogrammed with its new - * phy data. - */ -static enum sci_status -scic_sds_port_ready_configuring_substate_complete_io_handler( - struct scic_sds_port *port, - struct scic_sds_remote_device *device, - struct scic_sds_request *io_request) -{ - scic_sds_port_decrement_request_count(port); - - if (port->started_request_count == 0) { - sci_base_state_machine_change_state( - &port->ready_substate_machine, - SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL - ); - } - - return SCI_SUCCESS; -} - -static enum sci_status default_port_handler(struct scic_sds_port *sci_port, - const char *func) -{ - dev_warn(sciport_to_dev(sci_port), - "%s: in wrong state: %d\n", func, - sci_base_state_machine_get_state(&sci_port->state_machine)); - return SCI_FAILURE_INVALID_STATE; -} - -static enum sci_status -scic_sds_port_default_start_handler(struct scic_sds_port *sci_port) -{ - return default_port_handler(sci_port, __func__); -} - -static enum sci_status -scic_sds_port_default_stop_handler(struct scic_sds_port *sci_port) -{ - return default_port_handler(sci_port, __func__); -} - -static enum sci_status -scic_sds_port_default_destruct_handler(struct scic_sds_port *sci_port) -{ - return default_port_handler(sci_port, __func__); -} - -static enum sci_status -scic_sds_port_default_reset_handler(struct scic_sds_port *sci_port, - u32 timeout) -{ - return default_port_handler(sci_port, __func__); -} - -static enum sci_status -scic_sds_port_default_add_phy_handler(struct scic_sds_port *sci_port, - struct scic_sds_phy *base_phy) -{ - return default_port_handler(sci_port, __func__); -} - -static enum sci_status -scic_sds_port_default_remove_phy_handler(struct scic_sds_port *sci_port, - struct scic_sds_phy *base_phy) -{ - return default_port_handler(sci_port, __func__); -} - -/* - * This is the default method for a port unsolicited frame request. It will - * report a warning and exit. enum sci_status SCI_FAILURE_INVALID_STATE Is it even - * possible to receive an unsolicited frame directed to a port object? It - * seems possible if we implementing virtual functions but until then? - */ -static enum sci_status -scic_sds_port_default_frame_handler(struct scic_sds_port *sci_port, - u32 frame_index) -{ - struct scic_sds_controller *scic = scic_sds_port_get_controller(sci_port); - - default_port_handler(sci_port, __func__); - scic_sds_controller_release_frame(scic, frame_index); - - return SCI_FAILURE_INVALID_STATE; -} - -static enum sci_status scic_sds_port_default_event_handler(struct scic_sds_port *sci_port, - u32 event_code) -{ - return default_port_handler(sci_port, __func__); -} - -static void scic_sds_port_default_link_up_handler(struct scic_sds_port *sci_port, - struct scic_sds_phy *sci_phy) -{ - default_port_handler(sci_port, __func__); -} - -static void scic_sds_port_default_link_down_handler(struct scic_sds_port *sci_port, - struct scic_sds_phy *sci_phy) -{ - default_port_handler(sci_port, __func__); -} - -static enum sci_status scic_sds_port_default_start_io_handler(struct scic_sds_port *sci_port, - struct scic_sds_remote_device *sci_dev, - struct scic_sds_request *sci_req) -{ - return default_port_handler(sci_port, __func__); -} - -static enum sci_status scic_sds_port_default_complete_io_handler(struct scic_sds_port *sci_port, - struct scic_sds_remote_device *sci_dev, - struct scic_sds_request *sci_req) -{ - return default_port_handler(sci_port, __func__); -} - - - -static struct scic_sds_port_state_handler -scic_sds_port_ready_substate_handler_table[SCIC_SDS_PORT_READY_MAX_SUBSTATES] = { - { - /* SCIC_SDS_PORT_READY_SUBSTATE_WAITING */ - scic_sds_port_default_start_handler, - scic_sds_port_ready_substate_stop_handler, - scic_sds_port_default_destruct_handler, - scic_sds_port_default_reset_handler, - scic_sds_port_ready_substate_add_phy_handler, - scic_sds_port_default_remove_phy_handler, - scic_sds_port_default_frame_handler, - scic_sds_port_default_event_handler, - scic_sds_port_ready_waiting_substate_link_up_handler, - scic_sds_port_default_link_down_handler, - scic_sds_port_ready_waiting_substate_start_io_handler, - scic_sds_port_ready_substate_complete_io_handler, - }, - - { - /* SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL */ - scic_sds_port_default_start_handler, - scic_sds_port_ready_substate_stop_handler, - scic_sds_port_default_destruct_handler, - scic_sds_port_ready_operational_substate_reset_handler, - scic_sds_port_ready_substate_add_phy_handler, - scic_sds_port_ready_substate_remove_phy_handler, - scic_sds_port_default_frame_handler, - scic_sds_port_default_event_handler, - scic_sds_port_ready_operational_substate_link_up_handler, - scic_sds_port_ready_operational_substate_link_down_handler, - scic_sds_port_ready_operational_substate_start_io_handler, - scic_sds_port_ready_substate_complete_io_handler, - }, - - { - /* SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING */ - scic_sds_port_default_start_handler, - scic_sds_port_ready_substate_stop_handler, - scic_sds_port_default_destruct_handler, - scic_sds_port_default_reset_handler, - scic_sds_port_ready_configuring_substate_add_phy_handler, - scic_sds_port_ready_configuring_substate_remove_phy_handler, - scic_sds_port_default_frame_handler, - scic_sds_port_default_event_handler, - scic_sds_port_default_link_up_handler, - scic_sds_port_default_link_down_handler, - scic_sds_port_default_start_io_handler, - scic_sds_port_ready_configuring_substate_complete_io_handler - } -}; - -/** - * scic_sds_port_set_ready_state_handlers() - - * - * This macro sets the port ready substate handlers. - */ -#define scic_sds_port_set_ready_state_handlers(port, state_id) \ - scic_sds_port_set_state_handlers(\ - port, &scic_sds_port_ready_substate_handler_table[(state_id)] \ - ) - -/* - * ****************************************************************************** - * * PORT STATE PRIVATE METHODS - * ****************************************************************************** */ - -/** - * - * @sci_port: This is the struct scic_sds_port object to suspend. - * - * This method will susped the port task scheduler for this port object. none - */ -static void -scic_sds_port_suspend_port_task_scheduler(struct scic_sds_port *port) -{ - u32 pts_control_value; - - pts_control_value = readl(&port->port_task_scheduler_registers->control); - pts_control_value |= SCU_PTSxCR_GEN_BIT(SUSPEND); - writel(pts_control_value, &port->port_task_scheduler_registers->control); -} - -/** - * scic_sds_port_post_dummy_request() - post dummy/workaround request - * @sci_port: port to post task - * - * Prevent the hardware scheduler from posting new requests to the front - * of the scheduler queue causing a starvation problem for currently - * ongoing requests. - * - */ -static void scic_sds_port_post_dummy_request(struct scic_sds_port *sci_port) -{ - u32 command; - struct scu_task_context *task_context; - struct scic_sds_controller *scic = sci_port->owning_controller; - u16 tci = sci_port->reserved_tci; - - task_context = scic_sds_controller_get_task_context_buffer(scic, tci); - - task_context->abort = 0; - - command = SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_TC | - sci_port->physical_port_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT | - tci; - - scic_sds_controller_post_request(scic, command); -} - -/** - * This routine will abort the dummy request. This will alow the hardware to - * power down parts of the silicon to save power. - * - * @sci_port: The port on which the task must be aborted. - * - */ -static void scic_sds_port_abort_dummy_request(struct scic_sds_port *sci_port) -{ - struct scic_sds_controller *scic = sci_port->owning_controller; - u16 tci = sci_port->reserved_tci; - struct scu_task_context *tc; - u32 command; - - tc = scic_sds_controller_get_task_context_buffer(scic, tci); - - tc->abort = 1; - - command = SCU_CONTEXT_COMMAND_REQUEST_POST_TC_ABORT | - sci_port->physical_port_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT | - tci; - - scic_sds_controller_post_request(scic, command); -} - -/** - * - * @sci_port: This is the struct scic_sds_port object to resume. - * - * This method will resume the port task scheduler for this port object. none - */ -static void -scic_sds_port_resume_port_task_scheduler(struct scic_sds_port *port) -{ - u32 pts_control_value; - - pts_control_value = readl(&port->port_task_scheduler_registers->control); - pts_control_value &= ~SCU_PTSxCR_GEN_BIT(SUSPEND); - writel(pts_control_value, &port->port_task_scheduler_registers->control); -} - -/* - * ****************************************************************************** - * * PORT READY SUBSTATE METHODS - * ****************************************************************************** */ - -/** - * - * @object: This is the object which is cast to a struct scic_sds_port object. - * - * This method will perform the actions required by the struct scic_sds_port on - * entering the SCIC_SDS_PORT_READY_SUBSTATE_WAITING. This function checks the - * port for any ready phys. If there is at least one phy in a ready state then - * the port transitions to the ready operational substate. none - */ -static void scic_sds_port_ready_substate_waiting_enter(void *object) -{ - struct scic_sds_port *sci_port = object; - - scic_sds_port_set_ready_state_handlers( - sci_port, SCIC_SDS_PORT_READY_SUBSTATE_WAITING - ); - - scic_sds_port_suspend_port_task_scheduler(sci_port); - - sci_port->not_ready_reason = SCIC_PORT_NOT_READY_NO_ACTIVE_PHYS; - - if (sci_port->active_phy_mask != 0) { - /* At least one of the phys on the port is ready */ - sci_base_state_machine_change_state( - &sci_port->ready_substate_machine, - SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL - ); - } -} - -/** - * - * @object: This is the object which is cast to a struct scic_sds_port object. - * - * This function will perform the actions required by the struct scic_sds_port - * on entering the SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL. This function sets - * the state handlers for the port object, notifies the SCI User that the port - * is ready, and resumes port operations. none - */ -static void scic_sds_port_ready_substate_operational_enter(void *object) -{ - u32 index; - struct scic_sds_port *sci_port = object; - struct scic_sds_controller *scic = sci_port->owning_controller; - struct isci_host *ihost = scic_to_ihost(scic); - struct isci_port *iport = sci_port_to_iport(sci_port); - - scic_sds_port_set_ready_state_handlers( - sci_port, - SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL); - - isci_port_ready(ihost, iport); - - for (index = 0; index < SCI_MAX_PHYS; index++) { - if (sci_port->phy_table[index]) { - writel(sci_port->physical_port_index, - &sci_port->port_pe_configuration_register[ - sci_port->phy_table[index]->phy_index]); - } - } - - scic_sds_port_update_viit_entry(sci_port); - - scic_sds_port_resume_port_task_scheduler(sci_port); - - /* - * Post the dummy task for the port so the hardware can schedule - * io correctly - */ - scic_sds_port_post_dummy_request(sci_port); -} - -/** - * - * @object: This is the object which is cast to a struct scic_sds_port object. - * - * This method will perform the actions required by the struct scic_sds_port on - * exiting the SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL. This function reports - * the port not ready and suspends the port task scheduler. none - */ -static void scic_sds_port_ready_substate_operational_exit(void *object) -{ - struct scic_sds_port *sci_port = object; - struct scic_sds_controller *scic = sci_port->owning_controller; - struct isci_host *ihost = scic_to_ihost(scic); - struct isci_port *iport = sci_port_to_iport(sci_port); - - /* - * Kill the dummy task for this port if it has not yet posted - * the hardware will treat this as a NOP and just return abort - * complete. - */ - scic_sds_port_abort_dummy_request(sci_port); - - isci_port_not_ready(ihost, iport); -} - -/* - * ****************************************************************************** - * * PORT READY CONFIGURING METHODS - * ****************************************************************************** */ - -/** - * scic_sds_port_ready_substate_configuring_enter() - - * @object: This is the object which is cast to a struct scic_sds_port object. - * - * This method will perform the actions required by the struct scic_sds_port on - * exiting the SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL. This function reports - * the port not ready and suspends the port task scheduler. none - */ -static void scic_sds_port_ready_substate_configuring_enter(void *object) -{ - struct scic_sds_port *sci_port = object; - struct scic_sds_controller *scic = sci_port->owning_controller; - struct isci_host *ihost = scic_to_ihost(scic); - struct isci_port *iport = sci_port_to_iport(sci_port); - - scic_sds_port_set_ready_state_handlers( - sci_port, - SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING); - - if (sci_port->active_phy_mask == 0) { - isci_port_not_ready(ihost, iport); - - sci_base_state_machine_change_state( - &sci_port->ready_substate_machine, - SCIC_SDS_PORT_READY_SUBSTATE_WAITING); - } else if (sci_port->started_request_count == 0) - sci_base_state_machine_change_state( - &sci_port->ready_substate_machine, - SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL); -} - -static void scic_sds_port_ready_substate_configuring_exit(void *object) -{ - struct scic_sds_port *sci_port = object; - - scic_sds_port_suspend_port_task_scheduler(sci_port); -} - -/* --------------------------------------------------------------------------- */ - -static const struct sci_base_state scic_sds_port_ready_substate_table[] = { - [SCIC_SDS_PORT_READY_SUBSTATE_WAITING] = { - .enter_state = scic_sds_port_ready_substate_waiting_enter, - }, - [SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL] = { - .enter_state = scic_sds_port_ready_substate_operational_enter, - .exit_state = scic_sds_port_ready_substate_operational_exit - }, - [SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING] = { - .enter_state = scic_sds_port_ready_substate_configuring_enter, - .exit_state = scic_sds_port_ready_substate_configuring_exit - }, -}; - -/** - * - * @port: This is the struct scic_sds_port object on which the io request count will - * be decremented. - * @device: This is the struct scic_sds_remote_device object to which the io request - * is being directed. This parameter is not required to complete this - * operation. - * @io_request: This is the request that is being completed on this port - * object. This parameter is not required to complete this operation. - * - * This is a general complete io request handler for the struct scic_sds_port object. - * enum sci_status SCI_SUCCESS - */ -static enum sci_status scic_sds_port_general_complete_io_handler( - struct scic_sds_port *port, - struct scic_sds_remote_device *device, - struct scic_sds_request *io_request) -{ - scic_sds_port_decrement_request_count(port); - - return SCI_SUCCESS; -} - -/** - * scic_sds_port_stopped_state_start_handler() - stop a port from "started" - * - * @port: This is the struct scic_sds_port object which is cast into a - * struct scic_sds_port object. - * - * This function takes the struct scic_sds_port from a stopped state and - * attempts to start it. To start a port it must have no assiged devices and - * it must have at least one phy assigned to it. If those conditions are - * met then the port can transition to the ready state. - * enum sci_status - * SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION - * This struct scic_sds_port object could not be started because the port - * configuration is not valid. - * SCI_SUCCESS - * the start request is successful and the struct scic_sds_port object - * has transitioned to the SCI_BASE_PORT_STATE_READY. - */ -static enum sci_status -scic_sds_port_stopped_state_start_handler(struct scic_sds_port *sci_port) -{ - struct scic_sds_controller *scic = sci_port->owning_controller; - struct isci_host *ihost = scic_to_ihost(scic); - enum sci_status status = SCI_SUCCESS; - u32 phy_mask; - - if (sci_port->assigned_device_count > 0) { - /* - * @todo This is a start failure operation because - * there are still devices assigned to this port. - * There must be no devices assigned to a port on a - * start operation. - */ - return SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION; - } - - sci_port->timer_handle = - isci_timer_create(ihost, - sci_port, - scic_sds_port_timeout_handler); - - if (!sci_port->timer_handle) - return SCI_FAILURE_INSUFFICIENT_RESOURCES; - - if (sci_port->reserved_rni == SCU_DUMMY_INDEX) { - u16 rni = scic_sds_remote_node_table_allocate_remote_node( - &scic->available_remote_nodes, 1); - - if (rni != SCU_DUMMY_INDEX) - scic_sds_port_construct_dummy_rnc(sci_port, rni); - else - status = SCI_FAILURE_INSUFFICIENT_RESOURCES; - sci_port->reserved_rni = rni; - } - - if (sci_port->reserved_tci == SCU_DUMMY_INDEX) { - /* Allocate a TCI and remove the sequence nibble */ - u16 tci = scic_controller_allocate_io_tag(scic); - - if (tci != SCU_DUMMY_INDEX) - scic_sds_port_construct_dummy_task(sci_port, tci); - else - status = SCI_FAILURE_INSUFFICIENT_RESOURCES; - sci_port->reserved_tci = tci; - } - - if (status == SCI_SUCCESS) { - phy_mask = scic_sds_port_get_phys(sci_port); - - /* - * There are one or more phys assigned to this port. Make sure - * the port's phy mask is in fact legal and supported by the - * silicon. - */ - if (scic_sds_port_is_phy_mask_valid(sci_port, phy_mask) == true) { - sci_base_state_machine_change_state( - &sci_port->state_machine, - SCI_BASE_PORT_STATE_READY); - - return SCI_SUCCESS; - } else - status = SCI_FAILURE; - } - - if (status != SCI_SUCCESS) - scic_sds_port_destroy_dummy_resources(sci_port); - - return status; -} - -/* - * This method takes the struct scic_sds_port that is in a stopped state and handles a - * stop request. This function takes no action. enum sci_status SCI_SUCCESS the - * stop request is successful as the struct scic_sds_port object is already stopped. - */ -static enum sci_status scic_sds_port_stopped_state_stop_handler( - struct scic_sds_port *port) -{ - /* We are already stopped so there is nothing to do here */ - return SCI_SUCCESS; -} - -/* - * This method takes the struct scic_sds_port that is in a stopped state and handles - * the destruct request. The stopped state is the only state in which the - * struct scic_sds_port can be destroyed. This function causes the port object to - * transition to the SCI_BASE_PORT_STATE_FINAL. enum sci_status SCI_SUCCESS - */ -static enum sci_status scic_sds_port_stopped_state_destruct_handler( - struct scic_sds_port *port) -{ - sci_base_state_machine_stop(&port->state_machine); - - return SCI_SUCCESS; -} - -/* - * This method takes the struct scic_sds_port that is in a stopped state and handles - * the add phy request. In MPC mode the only time a phy can be added to a port - * is in the SCI_BASE_PORT_STATE_STOPPED. enum sci_status - * SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION is returned when the phy can not - * be added to the port. SCI_SUCCESS if the phy is added to the port. - */ -static enum sci_status scic_sds_port_stopped_state_add_phy_handler( - struct scic_sds_port *port, - struct scic_sds_phy *phy) -{ - struct sci_sas_address port_sas_address; - - /* Read the port assigned SAS Address if there is one */ - scic_sds_port_get_sas_address(port, &port_sas_address); - - if (port_sas_address.high != 0 && port_sas_address.low != 0) { - struct sci_sas_address phy_sas_address; - - /* - * Make sure that the PHY SAS Address matches the SAS Address - * for this port. */ - scic_sds_phy_get_sas_address(phy, &phy_sas_address); - - if ( - (port_sas_address.high != phy_sas_address.high) - || (port_sas_address.low != phy_sas_address.low) - ) { - return SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION; - } - } - - return scic_sds_port_set_phy(port, phy); -} - -/* - * This method takes the struct scic_sds_port that is in a stopped state and handles - * the remove phy request. In MPC mode the only time a phy can be removed from - * a port is in the SCI_BASE_PORT_STATE_STOPPED. enum sci_status - * SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION is returned when the phy can not - * be added to the port. SCI_SUCCESS if the phy is added to the port. - */ -static enum sci_status scic_sds_port_stopped_state_remove_phy_handler( - struct scic_sds_port *port, - struct scic_sds_phy *phy) -{ - return scic_sds_port_clear_phy(port, phy); -} - -/* - * **************************************************************************** - * * READY STATE HANDLERS - * **************************************************************************** */ - -/* - * **************************************************************************** - * * RESETTING STATE HANDLERS - * **************************************************************************** */ - -/* - * **************************************************************************** - * * STOPPING STATE HANDLERS - * **************************************************************************** */ - -/* - * This method takes the struct scic_sds_port that is in a stopping state and handles - * the complete io request. Should the request count reach 0 then the port - * object will transition to the stopped state. enum sci_status SCI_SUCCESS - */ -static enum sci_status scic_sds_port_stopping_state_complete_io_handler( - struct scic_sds_port *sci_port, - struct scic_sds_remote_device *device, - struct scic_sds_request *io_request) -{ - scic_sds_port_decrement_request_count(sci_port); - - if (sci_port->started_request_count == 0) { - sci_base_state_machine_change_state(&sci_port->state_machine, - SCI_BASE_PORT_STATE_STOPPED); - } - - return SCI_SUCCESS; -} - -/* - * **************************************************************************** - * * RESETTING STATE HANDLERS - * **************************************************************************** */ - -/** - * - * @port: This is the port object which is being requested to stop. - * - * This method will stop a failed port. This causes a transition to the - * stopping state. enum sci_status SCI_SUCCESS - */ -static enum sci_status scic_sds_port_reset_state_stop_handler( - struct scic_sds_port *port) -{ - sci_base_state_machine_change_state( - &port->state_machine, - SCI_BASE_PORT_STATE_STOPPING - ); - - return SCI_SUCCESS; -} - -/* - * This method will transition a failed port to its ready state. The port - * failed because a hard reset request timed out but at some time later one or - * more phys in the port became ready. enum sci_status SCI_SUCCESS - */ -static void scic_sds_port_reset_state_link_up_handler( - struct scic_sds_port *port, - struct scic_sds_phy *phy) -{ - /* - * / @todo We should make sure that the phy that has gone link up is the same - * / one on which we sent the reset. It is possible that the phy on - * / which we sent the reset is not the one that has gone link up and we - * / want to make sure that phy being reset comes back. Consider the - * / case where a reset is sent but before the hardware processes the - * / reset it get a link up on the port because of a hot plug event. - * / because of the reset request this phy will go link down almost - * / immediately. */ - - /* - * In the resetting state we don't notify the user regarding - * link up and link down notifications. */ - scic_sds_port_general_link_up_handler(port, phy, false); -} - -/* - * This method process link down notifications that occur during a port reset - * operation. Link downs can occur during the reset operation. enum sci_status - * SCI_SUCCESS - */ -static void scic_sds_port_reset_state_link_down_handler( - struct scic_sds_port *port, - struct scic_sds_phy *phy) -{ - /* - * In the resetting state we don't notify the user regarding - * link up and link down notifications. */ - scic_sds_port_deactivate_phy(port, phy, false); -} - -static struct scic_sds_port_state_handler -scic_sds_port_state_handler_table[SCI_BASE_PORT_MAX_STATES] = -{ - /* SCI_BASE_PORT_STATE_STOPPED */ - { - scic_sds_port_stopped_state_start_handler, - scic_sds_port_stopped_state_stop_handler, - scic_sds_port_stopped_state_destruct_handler, - scic_sds_port_default_reset_handler, - scic_sds_port_stopped_state_add_phy_handler, - scic_sds_port_stopped_state_remove_phy_handler, - scic_sds_port_default_frame_handler, - scic_sds_port_default_event_handler, - scic_sds_port_default_link_up_handler, - scic_sds_port_default_link_down_handler, - scic_sds_port_default_start_io_handler, - scic_sds_port_default_complete_io_handler - }, - /* SCI_BASE_PORT_STATE_STOPPING */ - { - scic_sds_port_default_start_handler, - scic_sds_port_default_stop_handler, - scic_sds_port_default_destruct_handler, - scic_sds_port_default_reset_handler, - scic_sds_port_default_add_phy_handler, - scic_sds_port_default_remove_phy_handler, - scic_sds_port_default_frame_handler, - scic_sds_port_default_event_handler, - scic_sds_port_default_link_up_handler, - scic_sds_port_default_link_down_handler, - scic_sds_port_default_start_io_handler, - scic_sds_port_stopping_state_complete_io_handler - }, - /* SCI_BASE_PORT_STATE_READY */ - { - scic_sds_port_default_start_handler, - scic_sds_port_default_stop_handler, - scic_sds_port_default_destruct_handler, - scic_sds_port_default_reset_handler, - scic_sds_port_default_add_phy_handler, - scic_sds_port_default_remove_phy_handler, - scic_sds_port_default_frame_handler, - scic_sds_port_default_event_handler, - scic_sds_port_default_link_up_handler, - scic_sds_port_default_link_down_handler, - scic_sds_port_default_start_io_handler, - scic_sds_port_general_complete_io_handler - }, - /* SCI_BASE_PORT_STATE_RESETTING */ - { - scic_sds_port_default_start_handler, - scic_sds_port_reset_state_stop_handler, - scic_sds_port_default_destruct_handler, - scic_sds_port_default_reset_handler, - scic_sds_port_default_add_phy_handler, - scic_sds_port_default_remove_phy_handler, - scic_sds_port_default_frame_handler, - scic_sds_port_default_event_handler, - scic_sds_port_reset_state_link_up_handler, - scic_sds_port_reset_state_link_down_handler, - scic_sds_port_default_start_io_handler, - scic_sds_port_general_complete_io_handler - }, - /* SCI_BASE_PORT_STATE_FAILED */ - { - scic_sds_port_default_start_handler, - scic_sds_port_default_stop_handler, - scic_sds_port_default_destruct_handler, - scic_sds_port_default_reset_handler, - scic_sds_port_default_add_phy_handler, - scic_sds_port_default_remove_phy_handler, - scic_sds_port_default_frame_handler, - scic_sds_port_default_event_handler, - scic_sds_port_default_link_up_handler, - scic_sds_port_default_link_down_handler, - scic_sds_port_default_start_io_handler, - scic_sds_port_general_complete_io_handler - } -}; - -/* - * ****************************************************************************** - * * PORT STATE PRIVATE METHODS - * ****************************************************************************** */ - -/** - * - * @sci_port: This is the port object which to suspend. - * - * This method will enable the SCU Port Task Scheduler for this port object but - * will leave the port task scheduler in a suspended state. none - */ -static void -scic_sds_port_enable_port_task_scheduler(struct scic_sds_port *port) -{ - u32 pts_control_value; - - pts_control_value = readl(&port->port_task_scheduler_registers->control); - pts_control_value |= SCU_PTSxCR_GEN_BIT(ENABLE) | SCU_PTSxCR_GEN_BIT(SUSPEND); - writel(pts_control_value, &port->port_task_scheduler_registers->control); -} - -/** - * - * @sci_port: This is the port object which to resume. - * - * This method will disable the SCU port task scheduler for this port object. - * none - */ -static void -scic_sds_port_disable_port_task_scheduler(struct scic_sds_port *port) -{ - u32 pts_control_value; - - pts_control_value = readl(&port->port_task_scheduler_registers->control); - pts_control_value &= - ~(SCU_PTSxCR_GEN_BIT(ENABLE) | SCU_PTSxCR_GEN_BIT(SUSPEND)); - writel(pts_control_value, &port->port_task_scheduler_registers->control); -} - -static void scic_sds_port_post_dummy_remote_node(struct scic_sds_port *sci_port) -{ - struct scic_sds_controller *scic = sci_port->owning_controller; - u8 phys_index = sci_port->physical_port_index; - union scu_remote_node_context *rnc; - u16 rni = sci_port->reserved_rni; - u32 command; - - rnc = &scic->remote_node_context_table[rni]; - rnc->ssp.is_valid = true; - - command = SCU_CONTEXT_COMMAND_POST_RNC_32 | - phys_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT | rni; - - scic_sds_controller_post_request(scic, command); - - /* ensure hardware has seen the post rnc command and give it - * ample time to act before sending the suspend - */ - readl(&scic->smu_registers->interrupt_status); /* flush */ - udelay(10); - - command = SCU_CONTEXT_COMMAND_POST_RNC_SUSPEND_TX_RX | - phys_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT | rni; - - scic_sds_controller_post_request(scic, command); -} - -static void scic_sds_port_invalidate_dummy_remote_node(struct scic_sds_port *sci_port) -{ - struct scic_sds_controller *scic = sci_port->owning_controller; - u8 phys_index = sci_port->physical_port_index; - union scu_remote_node_context *rnc; - u16 rni = sci_port->reserved_rni; - u32 command; - - rnc = &scic->remote_node_context_table[rni]; - - rnc->ssp.is_valid = false; - - /* ensure the preceding tc abort request has reached the - * controller and give it ample time to act before posting the rnc - * invalidate - */ - readl(&scic->smu_registers->interrupt_status); /* flush */ - udelay(10); - - command = SCU_CONTEXT_COMMAND_POST_RNC_INVALIDATE | - phys_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT | rni; - - scic_sds_controller_post_request(scic, command); -} - -/* - * ****************************************************************************** - * * PORT STATE METHODS - * ****************************************************************************** */ - -/** - * - * @object: This is the object which is cast to a struct scic_sds_port object. - * - * This method will perform the actions required by the struct scic_sds_port on - * entering the SCI_BASE_PORT_STATE_STOPPED. This function sets the stopped - * state handlers for the struct scic_sds_port object and disables the port task - * scheduler in the hardware. none - */ -static void scic_sds_port_stopped_state_enter(void *object) -{ - struct scic_sds_port *sci_port = object; - - scic_sds_port_set_base_state_handlers( - sci_port, SCI_BASE_PORT_STATE_STOPPED - ); - - if ( - SCI_BASE_PORT_STATE_STOPPING - == sci_port->state_machine.previous_state_id - ) { - /* - * If we enter this state becasuse of a request to stop - * the port then we want to disable the hardwares port - * task scheduler. */ - scic_sds_port_disable_port_task_scheduler(sci_port); - } -} - -/** - * - * @object: This is the object which is cast to a struct scic_sds_port object. - * - * This method will perform the actions required by the struct scic_sds_port on - * exiting the SCI_BASE_STATE_STOPPED. This function enables the SCU hardware - * port task scheduler. none - */ -static void scic_sds_port_stopped_state_exit(void *object) -{ - struct scic_sds_port *sci_port = object; - - /* Enable and suspend the port task scheduler */ - scic_sds_port_enable_port_task_scheduler(sci_port); -} - -/** - * scic_sds_port_ready_state_enter - - * @object: This is the object which is cast to a struct scic_sds_port object. - * - * This method will perform the actions required by the struct scic_sds_port on - * entering the SCI_BASE_PORT_STATE_READY. This function sets the ready state - * handlers for the struct scic_sds_port object, reports the port object as - * not ready and starts the ready substate machine. none - */ -static void scic_sds_port_ready_state_enter(void *object) -{ - struct scic_sds_port *sci_port = object; - struct scic_sds_controller *scic = sci_port->owning_controller; - struct isci_host *ihost = scic_to_ihost(scic); - struct isci_port *iport = sci_port_to_iport(sci_port); - u32 prev_state; - - /* Put the ready state handlers in place though they will not be there long */ - scic_sds_port_set_base_state_handlers(sci_port, SCI_BASE_PORT_STATE_READY); - - prev_state = sci_port->state_machine.previous_state_id; - if (prev_state == SCI_BASE_PORT_STATE_RESETTING) - isci_port_hard_reset_complete(iport, SCI_SUCCESS); - else - isci_port_not_ready(ihost, iport); - - /* Post and suspend the dummy remote node context for this port. */ - scic_sds_port_post_dummy_remote_node(sci_port); - - /* Start the ready substate machine */ - sci_base_state_machine_start(&sci_port->ready_substate_machine); -} - -static void scic_sds_port_ready_state_exit(void *object) -{ - struct scic_sds_port *sci_port = object; - - sci_base_state_machine_stop(&sci_port->ready_substate_machine); - scic_sds_port_invalidate_dummy_remote_node(sci_port); -} - -/** - * - * @object: This is the object which is cast to a struct scic_sds_port object. - * - * This method will perform the actions required by the struct scic_sds_port on - * entering the SCI_BASE_PORT_STATE_RESETTING. This function sets the resetting - * state handlers for the struct scic_sds_port object. none - */ -static void scic_sds_port_resetting_state_enter(void *object) -{ - struct scic_sds_port *sci_port = object; - - scic_sds_port_set_base_state_handlers( - sci_port, SCI_BASE_PORT_STATE_RESETTING - ); -} - -/** - * - * @object: This is the object which is cast to a struct scic_sds_port object. - * - * This function will perform the actions required by the - * struct scic_sds_port on - * exiting the SCI_BASE_STATE_RESETTING. This function does nothing. none - */ -static inline void scic_sds_port_resetting_state_exit(void *object) -{ - struct scic_sds_port *sci_port = object; - - isci_timer_stop(sci_port->timer_handle); -} - -/** - * - * @object: This is the void object which is cast to a - * struct scic_sds_port object. - * - * This method will perform the actions required by the struct scic_sds_port on - * entering the SCI_BASE_PORT_STATE_STOPPING. This function sets the stopping - * state handlers for the struct scic_sds_port object. none - */ -static void scic_sds_port_stopping_state_enter(void *object) -{ - struct scic_sds_port *sci_port = object; - - scic_sds_port_set_base_state_handlers( - sci_port, SCI_BASE_PORT_STATE_STOPPING - ); -} - -/** - * - * @object: This is the object which is cast to a struct scic_sds_port object. - * - * This function will perform the actions required by the - * struct scic_sds_port on - * exiting the SCI_BASE_STATE_STOPPING. This function does nothing. none - */ -static inline void -scic_sds_port_stopping_state_exit(void *object) -{ - struct scic_sds_port *sci_port = object; - - isci_timer_stop(sci_port->timer_handle); - - scic_sds_port_destroy_dummy_resources(sci_port); -} - -/** - * - * @object: This is the object which is cast to a struct scic_sds_port object. - * - * This function will perform the actions required by the - * struct scic_sds_port on - * entering the SCI_BASE_PORT_STATE_STOPPING. This function sets the stopping - * state handlers for the struct scic_sds_port object. none - */ -static void scic_sds_port_failed_state_enter(void *object) -{ - struct scic_sds_port *sci_port = object; - struct isci_port *iport = sci_port_to_iport(sci_port); - - scic_sds_port_set_base_state_handlers(sci_port, - SCI_BASE_PORT_STATE_FAILED); - - isci_port_hard_reset_complete(iport, SCI_FAILURE_TIMEOUT); -} - -/* --------------------------------------------------------------------------- */ - -static const struct sci_base_state scic_sds_port_state_table[] = { - [SCI_BASE_PORT_STATE_STOPPED] = { - .enter_state = scic_sds_port_stopped_state_enter, - .exit_state = scic_sds_port_stopped_state_exit - }, - [SCI_BASE_PORT_STATE_STOPPING] = { - .enter_state = scic_sds_port_stopping_state_enter, - .exit_state = scic_sds_port_stopping_state_exit - }, - [SCI_BASE_PORT_STATE_READY] = { - .enter_state = scic_sds_port_ready_state_enter, - .exit_state = scic_sds_port_ready_state_exit - }, - [SCI_BASE_PORT_STATE_RESETTING] = { - .enter_state = scic_sds_port_resetting_state_enter, - .exit_state = scic_sds_port_resetting_state_exit - }, - [SCI_BASE_PORT_STATE_FAILED] = { - .enter_state = scic_sds_port_failed_state_enter, - } -}; - -void scic_sds_port_construct(struct scic_sds_port *sci_port, u8 index, - struct scic_sds_controller *scic) -{ - sci_base_state_machine_construct(&sci_port->state_machine, - sci_port, - scic_sds_port_state_table, - SCI_BASE_PORT_STATE_STOPPED); - - sci_base_state_machine_start(&sci_port->state_machine); - - sci_base_state_machine_construct(&sci_port->ready_substate_machine, - sci_port, - scic_sds_port_ready_substate_table, - SCIC_SDS_PORT_READY_SUBSTATE_WAITING); - - sci_port->logical_port_index = SCIC_SDS_DUMMY_PORT; - sci_port->physical_port_index = index; - sci_port->active_phy_mask = 0; - - sci_port->owning_controller = scic; - - sci_port->started_request_count = 0; - sci_port->assigned_device_count = 0; - - sci_port->reserved_rni = SCU_DUMMY_INDEX; - sci_port->reserved_tci = SCU_DUMMY_INDEX; - - sci_port->timer_handle = NULL; - sci_port->port_task_scheduler_registers = NULL; - - for (index = 0; index < SCI_MAX_PHYS; index++) - sci_port->phy_table[index] = NULL; -} diff --git a/drivers/scsi/isci/core/scic_sds_port.h b/drivers/scsi/isci/core/scic_sds_port.h deleted file mode 100644 index a351525b1c49..000000000000 --- a/drivers/scsi/isci/core/scic_sds_port.h +++ /dev/null @@ -1,435 +0,0 @@ -/* - * 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_ - -#include <linux/kernel.h> -#include "isci.h" -#include "sas.h" -#include "registers.h" -#include "state_machine.h" - -struct scic_sds_controller; -struct scic_sds_phy; -struct scic_sds_remote_device; -struct scic_sds_request; - -#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 -}; - -/** - * enum scic_sds_port_states - This enumeration depicts all the states for the - * common port state machine. - * - * - */ -enum scic_sds_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_BASE_PORT_STATE_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_BASE_PORT_STATE_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_BASE_PORT_STATE_READY, - - /** - * 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_BASE_PORT_STATE_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_BASE_PORT_STATE_FAILED, - - SCI_BASE_PORT_MAX_STATES - -}; - -/** - * struct scic_sds_port - * - * The core port object provides the the abstraction for an SCU port. - */ -struct scic_sds_port { - - /** - * This field contains the information for the base port state machine. - */ - struct sci_base_state_machine state_machine; - - /** - * 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; - - u16 reserved_rni; - u16 reserved_tci; - - /** - * 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 port task scheduler registers - * for the SCU hardware. - */ - struct scu_port_task_scheduler_registers __iomem - *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. - */ - u32 __iomem *port_pe_configuration_register; - - /** - * This field is the VIIT register space for ths port object. - */ - struct scu_viit_entry __iomem *viit_registers; - -}; - -typedef enum sci_status (*scic_sds_port_handler_t)(struct scic_sds_port *); - -typedef enum sci_status (*scic_sds_port_phy_handler_t)(struct scic_sds_port *, - struct scic_sds_phy *); - -typedef enum sci_status (*scic_sds_port_reset_handler_t)(struct scic_sds_port *, - u32 timeout); - -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 { - /** - * The start_handler specifies the method invoked when a user - * attempts to start a port. - */ - scic_sds_port_handler_t start_handler; - - /** - * The stop_handler specifies the method invoked when a user - * attempts to stop a port. - */ - scic_sds_port_handler_t stop_handler; - - /** - * The destruct_handler specifies the method invoked when attempting to - * destruct a port. - */ - scic_sds_port_handler_t destruct_handler; - - /** - * The reset_handler specifies the method invoked when a user - * attempts to hard reset a port. - */ - scic_sds_port_reset_handler_t reset_handler; - - /** - * The add_phy_handler specifies the method invoked when a user - * attempts to add another phy into the port. - */ - scic_sds_port_phy_handler_t add_phy_handler; - - /** - * The remove_phy_handler specifies the method invoked when a user - * attempts to remove a phy from the port. - */ - scic_sds_port_phy_handler_t remove_phy_handler; - - 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; - -}; - -/** - * 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_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_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) - - -static inline void scic_sds_port_decrement_request_count(struct scic_sds_port *sci_port) -{ - if (WARN_ONCE(sci_port->started_request_count == 0, - "%s: tried to decrement started_request_count past 0!?", - __func__)) - /* pass */; - else - sci_port->started_request_count--; -} - -#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 *sci_port, - u8 port_index, - struct scic_sds_controller *scic); - -enum sci_status scic_sds_port_initialize( - struct scic_sds_port *sci_port, - void __iomem *port_task_scheduler_registers, - void __iomem *port_configuration_regsiter, - void __iomem *viit_registers); - -enum sci_status scic_sds_port_add_phy( - struct scic_sds_port *sci_port, - struct scic_sds_phy *sci_phy); - -enum sci_status scic_sds_port_remove_phy( - struct scic_sds_port *sci_port, - struct scic_sds_phy *sci_phy); - -void scic_sds_port_setup_transports( - struct scic_sds_port *sci_port, - u32 device_id); - - -void scic_sds_port_deactivate_phy( - struct scic_sds_port *sci_port, - struct scic_sds_phy *sci_phy, - bool do_notify_user); - -bool scic_sds_port_link_detected( - struct scic_sds_port *sci_port, - struct scic_sds_phy *sci_phy); - -void scic_sds_port_link_up( - struct scic_sds_port *sci_port, - struct scic_sds_phy *sci_phy); - -void scic_sds_port_link_down( - struct scic_sds_port *sci_port, - struct scic_sds_phy *sci_phy); - -enum sci_status scic_sds_port_start_io( - struct scic_sds_port *sci_port, - struct scic_sds_remote_device *sci_dev, - struct scic_sds_request *sci_req); - -enum sci_status scic_sds_port_complete_io( - struct scic_sds_port *sci_port, - struct scic_sds_remote_device *sci_dev, - struct scic_sds_request *sci_req); - -enum sas_linkrate scic_sds_port_get_max_allowed_speed( - struct scic_sds_port *sci_port); - -void scic_sds_port_broadcast_change_received( - struct scic_sds_port *sci_port, - struct scic_sds_phy *sci_phy); - -bool scic_sds_port_is_valid_phy_assignment( - struct scic_sds_port *sci_port, - u32 phy_index); - -void scic_sds_port_get_sas_address( - struct scic_sds_port *sci_port, - struct sci_sas_address *sas_address); - -void scic_sds_port_get_attached_sas_address( - struct scic_sds_port *sci_port, - struct sci_sas_address *sas_address); - -#endif /* _SCIC_SDS_PORT_H_ */ diff --git a/drivers/scsi/isci/core/scic_sds_port_configuration_agent.h b/drivers/scsi/isci/core/scic_sds_port_configuration_agent.h deleted file mode 100644 index 7fd161700475..000000000000 --- a/drivers/scsi/isci/core/scic_sds_port_configuration_agent.h +++ /dev/null @@ -1,107 +0,0 @@ -/* - * 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_CONFIGURATION_AGENT_H_ -#define _SCIC_SDS_PORT_CONFIGURATION_AGENT_H_ - -/** - * This file contains the structures, constants and prototypes used for the - * core controller automatic port configuration engine. - * - * - */ - -#include "scic_sds_port.h" - -struct scic_sds_controller; -struct scic_sds_port_configuration_agent; -struct scic_sds_port; -struct scic_sds_phy; - -typedef void (*scic_sds_port_configuration_agent_phy_handler_t)( - struct scic_sds_controller *, - struct scic_sds_port_configuration_agent *, - struct scic_sds_port *, - struct scic_sds_phy * - ); - -struct SCIC_SDS_PORT_RANGE { - u8 min_index; - u8 max_index; -}; - -struct scic_sds_port_configuration_agent { - u16 phy_configured_mask; - u16 phy_ready_mask; - - struct SCIC_SDS_PORT_RANGE phy_valid_port_range[SCI_MAX_PHYS]; - - bool timer_pending; - - scic_sds_port_configuration_agent_phy_handler_t link_up_handler; - scic_sds_port_configuration_agent_phy_handler_t link_down_handler; - - void *timer; - -}; - -void scic_sds_port_configuration_agent_construct( - struct scic_sds_port_configuration_agent *port_agent); - -enum sci_status scic_sds_port_configuration_agent_initialize( - struct scic_sds_controller *controller, - struct scic_sds_port_configuration_agent *port_agent); - -#endif /* _SCIC_SDS_PORT_CONFIGURATION_AGENT_H_ */ diff --git a/drivers/scsi/isci/host.c b/drivers/scsi/isci/host.c index e1930da08d4e..2bb9f1073e73 100644 --- a/drivers/scsi/isci/host.c +++ b/drivers/scsi/isci/host.c @@ -61,7 +61,6 @@ #include "probe_roms.h" #include "remote_device.h" #include "request.h" -#include "scic_sds_port_configuration_agent.h" #include "scu_completion_codes.h" #include "scu_event_codes.h" #include "registers.h" diff --git a/drivers/scsi/isci/host.h b/drivers/scsi/isci/host.h index 9c5d121ce791..784e1355e8ec 100644 --- a/drivers/scsi/isci/host.h +++ b/drivers/scsi/isci/host.h @@ -55,7 +55,6 @@ #ifndef _SCI_HOST_H_ #define _SCI_HOST_H_ -#include "scic_config_parameters.h" #include "remote_device.h" #include "phy.h" #include "pool.h" @@ -64,11 +63,12 @@ #include "registers.h" #include "scu_unsolicited_frame.h" #include "unsolicited_frame_control.h" -#include "scic_sds_port_configuration_agent.h" +#include "probe_roms.h" struct scic_sds_request; struct scu_task_context; + /** * struct scic_power_control - * @@ -107,6 +107,24 @@ struct scic_power_control { }; +struct scic_sds_port_configuration_agent; +typedef void (*port_config_fn)(struct scic_sds_controller *, + struct scic_sds_port_configuration_agent *, + struct scic_sds_port *, struct scic_sds_phy *); + +struct scic_sds_port_configuration_agent { + u16 phy_configured_mask; + u16 phy_ready_mask; + struct { + u8 min_index; + u8 max_index; + } phy_valid_port_range[SCI_MAX_PHYS]; + bool timer_pending; + port_config_fn link_up_handler; + port_config_fn link_down_handler; + void *timer; +}; + /** * struct scic_sds_controller - * @@ -800,4 +818,11 @@ u16 scic_controller_allocate_io_tag( enum sci_status scic_controller_free_io_tag( struct scic_sds_controller *scic, u16 io_tag); + +void scic_sds_port_configuration_agent_construct( + struct scic_sds_port_configuration_agent *port_agent); + +enum sci_status scic_sds_port_configuration_agent_initialize( + struct scic_sds_controller *controller, + struct scic_sds_port_configuration_agent *port_agent); #endif diff --git a/drivers/scsi/isci/phy.c b/drivers/scsi/isci/phy.c index b92d51f25481..0f64605200ff 100644 --- a/drivers/scsi/isci/phy.c +++ b/drivers/scsi/isci/phy.c @@ -57,9 +57,8 @@ #include "host.h" #include "phy.h" #include "scu_event_codes.h" -#include "scic_port.h" -#include "scic_config_parameters.h" #include "timers.h" +#include "probe_roms.h" /* Maximum arbitration wait time in micro-seconds */ #define SCIC_SDS_PHY_MAX_ARBITRATION_WAIT_TIME (700) diff --git a/drivers/scsi/isci/phy.h b/drivers/scsi/isci/phy.h index 093fd473366c..f1800368eda5 100644 --- a/drivers/scsi/isci/phy.h +++ b/drivers/scsi/isci/phy.h @@ -58,6 +58,7 @@ #include <scsi/sas.h> #include <scsi/libsas.h> #include "state_machine.h" +#include "sas.h" /* This is the timeout value for the SATA phy to wait for a SIGNATURE FIS * before restarting the starting state machine. Technically, the old parallel diff --git a/drivers/scsi/isci/port.c b/drivers/scsi/isci/port.c index 321935d9560b..dbff28396dd8 100644 --- a/drivers/scsi/isci/port.c +++ b/drivers/scsi/isci/port.c @@ -53,11 +53,13 @@ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ -#include <linux/workqueue.h> #include "isci.h" -#include "scic_port.h" #include "port.h" #include "request.h" +#include "timers.h" + +#define SCIC_SDS_PORT_HARD_RESET_TIMEOUT (1000) +#define SCU_DUMMY_INDEX (0xFFFF) static void isci_port_change_state(struct isci_port *iport, enum isci_status status) { @@ -73,44 +75,87 @@ static void isci_port_change_state(struct isci_port *iport, enum isci_status sta spin_unlock_irqrestore(&iport->state_lock, flags); } -void isci_port_init(struct isci_port *iport, struct isci_host *ihost, int index) +/* + * This function will indicate which protocols are supported by this port. + * @sci_port: a handle corresponding to the SAS port for which to return the + * supported protocols. + * @protocols: This parameter specifies a pointer to a data structure + * which the core will copy the protocol values for the port from the + * transmit_identification register. + */ +static void +scic_sds_port_get_protocols(struct scic_sds_port *sci_port, + struct scic_phy_proto *protocols) { - INIT_LIST_HEAD(&iport->remote_dev_list); - INIT_LIST_HEAD(&iport->domain_dev_list); - spin_lock_init(&iport->state_lock); - init_completion(&iport->start_complete); - iport->isci_host = ihost; - isci_port_change_state(iport, isci_freed); + u8 index; + + protocols->all = 0; + + for (index = 0; index < SCI_MAX_PHYS; index++) { + if (sci_port->phy_table[index] != NULL) { + scic_sds_phy_get_protocols(sci_port->phy_table[index], + protocols); + } + } } /** - * isci_port_get_state() - This function gets the status of the port object. - * @isci_port: This parameter points to the isci_port object + * This method requests a list (mask) of the phys contained in the supplied SAS + * port. + * @sci_port: a handle corresponding to the SAS port for which to return the + * phy mask. * - * status of the object as a isci_status enum. + * Return a bit mask indicating which phys are a part of this port. Each bit + * corresponds to a phy identifier (e.g. bit 0 = phy id 0). */ -enum isci_status isci_port_get_state( - struct isci_port *isci_port) +static u32 scic_sds_port_get_phys(struct scic_sds_port *sci_port) { - return isci_port->status; + u32 index; + u32 mask; + + mask = 0; + + for (index = 0; index < SCI_MAX_PHYS; index++) { + if (sci_port->phy_table[index] != NULL) { + mask |= (1 << index); + } + } + + return mask; } -void isci_port_bc_change_received(struct isci_host *ihost, - struct scic_sds_port *sci_port, - struct scic_sds_phy *sci_phy) +/** + * scic_port_get_properties() - This method simply returns the properties + * regarding the port, such as: physical index, protocols, sas address, etc. + * @port: this parameter specifies the port for which to retrieve the physical + * index. + * @properties: This parameter specifies the properties structure into which to + * copy the requested information. + * + * Indicate if the user specified a valid port. SCI_SUCCESS This value is + * returned if the specified port was valid. SCI_FAILURE_INVALID_PORT This + * value is returned if the specified port is not valid. When this value is + * returned, no data is copied to the properties output parameter. + */ +static enum sci_status scic_port_get_properties(struct scic_sds_port *port, + struct scic_port_properties *prop) { - struct isci_phy *iphy = sci_phy_to_iphy(sci_phy); + if ((port == NULL) || + (port->logical_port_index == SCIC_SDS_DUMMY_PORT)) + return SCI_FAILURE_INVALID_PORT; - dev_dbg(&ihost->pdev->dev, "%s: iphy = %p, sas_phy = %p\n", - __func__, iphy, &iphy->sas_phy); + prop->index = port->logical_port_index; + prop->phy_mask = scic_sds_port_get_phys(port); + scic_sds_port_get_sas_address(port, &prop->local.sas_address); + scic_sds_port_get_protocols(port, &prop->local.protocols); + scic_sds_port_get_attached_sas_address(port, &prop->remote.sas_address); - ihost->sas_ha.notify_port_event(&iphy->sas_phy, PORTE_BROADCAST_RCVD); - scic_port_enable_broadcast_change_notification(sci_port); + return SCI_SUCCESS; } -void isci_port_link_up(struct isci_host *isci_host, - struct scic_sds_port *port, - struct scic_sds_phy *phy) +static void isci_port_link_up(struct isci_host *isci_host, + struct scic_sds_port *port, + struct scic_sds_phy *phy) { unsigned long flags; struct scic_port_properties properties; @@ -184,8 +229,9 @@ void isci_port_link_up(struct isci_host *isci_host, * @port: This parameter specifies the isci port with the active link. * */ -void isci_port_link_down(struct isci_host *isci_host, struct isci_phy *isci_phy, - struct isci_port *isci_port) +static void isci_port_link_down(struct isci_host *isci_host, + struct isci_phy *isci_phy, + struct isci_port *isci_port) { struct isci_remote_device *isci_device; @@ -231,37 +277,13 @@ void isci_port_link_down(struct isci_host *isci_host, struct isci_phy *isci_phy, /** - * isci_port_deformed() - This function is called by libsas when a port becomes - * inactive. - * @phy: This parameter specifies the libsas phy with the inactive port. - * - */ -void isci_port_deformed( - struct asd_sas_phy *phy) -{ - pr_debug("%s: sas_phy = %p\n", __func__, phy); -} - -/** - * isci_port_formed() - This function is called by libsas when a port becomes - * active. - * @phy: This parameter specifies the libsas phy with the active port. - * - */ -void isci_port_formed( - struct asd_sas_phy *phy) -{ - pr_debug("%s: sas_phy = %p, sas_port = %p\n", __func__, phy, phy->port); -} - -/** * isci_port_ready() - This function is called by the sci core when a link * becomes ready. * @isci_host: This parameter specifies the isci host object. * @port: This parameter specifies the sci port with the active link. * */ -void isci_port_ready(struct isci_host *isci_host, struct isci_port *isci_port) +static void isci_port_ready(struct isci_host *isci_host, struct isci_port *isci_port) { dev_dbg(&isci_host->pdev->dev, "%s: isci_port = %p\n", __func__, isci_port); @@ -279,12 +301,19 @@ void isci_port_ready(struct isci_host *isci_host, struct isci_port *isci_port) * @port: This parameter specifies the sci port with the active link. * */ -void isci_port_not_ready(struct isci_host *isci_host, struct isci_port *isci_port) +static void isci_port_not_ready(struct isci_host *isci_host, struct isci_port *isci_port) { dev_dbg(&isci_host->pdev->dev, "%s: isci_port = %p\n", __func__, isci_port); } +static void isci_port_stop_complete(struct scic_sds_controller *scic, + struct scic_sds_port *sci_port, + enum sci_status completion_status) +{ + dev_dbg(&scic_to_ihost(scic)->pdev->dev, "Port stop complete\n"); +} + /** * isci_port_hard_reset_complete() - This function is called by the sci core * when the hard reset complete notification has been received. @@ -293,8 +322,8 @@ void isci_port_not_ready(struct isci_host *isci_host, struct isci_port *isci_por * process. * */ -void isci_port_hard_reset_complete(struct isci_port *isci_port, - enum sci_status completion_status) +static void isci_port_hard_reset_complete(struct isci_port *isci_port, + enum sci_status completion_status) { dev_dbg(&isci_port->isci_host->pdev->dev, "%s: isci_port = %p, completion_status=%x\n", @@ -306,6 +335,2293 @@ void isci_port_hard_reset_complete(struct isci_port *isci_port, complete_all(&isci_port->hard_reset_complete); } +/* This method will return a true value if the specified phy can be assigned to + * this port The following is a list of phys for each port that are allowed: - + * Port 0 - 3 2 1 0 - Port 1 - 1 - Port 2 - 3 2 - Port 3 - 3 This method + * doesn't preclude all configurations. It merely ensures that a phy is part + * of the allowable set of phy identifiers for that port. For example, one + * could assign phy 3 to port 0 and no other phys. Please refer to + * scic_sds_port_is_phy_mask_valid() for information regarding whether the + * phy_mask for a port can be supported. bool true if this is a valid phy + * assignment for the port false if this is not a valid phy assignment for the + * port + */ +bool scic_sds_port_is_valid_phy_assignment(struct scic_sds_port *sci_port, + u32 phy_index) +{ + /* Initialize to invalid value. */ + u32 existing_phy_index = SCI_MAX_PHYS; + u32 index; + + if ((sci_port->physical_port_index == 1) && (phy_index != 1)) { + return false; + } + + if (sci_port->physical_port_index == 3 && phy_index != 3) { + return false; + } + + if ( + (sci_port->physical_port_index == 2) + && ((phy_index == 0) || (phy_index == 1)) + ) { + return false; + } + + for (index = 0; index < SCI_MAX_PHYS; index++) { + if ((sci_port->phy_table[index] != NULL) + && (index != phy_index)) { + existing_phy_index = index; + } + } + + /* + * Ensure that all of the phys in the port are capable of + * operating at the same maximum link rate. */ + if ( + (existing_phy_index < SCI_MAX_PHYS) + && (sci_port->owning_controller->user_parameters.sds1.phys[ + phy_index].max_speed_generation != + sci_port->owning_controller->user_parameters.sds1.phys[ + existing_phy_index].max_speed_generation) + ) + return false; + + return true; +} + +/** + * + * @sci_port: This is the port object for which to determine if the phy mask + * can be supported. + * + * This method will return a true value if the port's phy mask can be supported + * by the SCU. The following is a list of valid PHY mask configurations for + * each port: - Port 0 - [[3 2] 1] 0 - Port 1 - [1] - Port 2 - [[3] 2] + * - Port 3 - [3] This method returns a boolean indication specifying if the + * phy mask can be supported. true if this is a valid phy assignment for the + * port false if this is not a valid phy assignment for the port + */ +static bool scic_sds_port_is_phy_mask_valid( + struct scic_sds_port *sci_port, + u32 phy_mask) +{ + if (sci_port->physical_port_index == 0) { + if (((phy_mask & 0x0F) == 0x0F) + || ((phy_mask & 0x03) == 0x03) + || ((phy_mask & 0x01) == 0x01) + || (phy_mask == 0)) + return true; + } else if (sci_port->physical_port_index == 1) { + if (((phy_mask & 0x02) == 0x02) + || (phy_mask == 0)) + return true; + } else if (sci_port->physical_port_index == 2) { + if (((phy_mask & 0x0C) == 0x0C) + || ((phy_mask & 0x04) == 0x04) + || (phy_mask == 0)) + return true; + } else if (sci_port->physical_port_index == 3) { + if (((phy_mask & 0x08) == 0x08) + || (phy_mask == 0)) + return true; + } + + return false; +} + +/** + * + * @sci_port: This parameter specifies the port from which to return a + * connected phy. + * + * This method retrieves a currently active (i.e. connected) phy contained in + * the port. Currently, the lowest order phy that is connected is returned. + * This method returns a pointer to a SCIS_SDS_PHY object. NULL This value is + * returned if there are no currently active (i.e. connected to a remote end + * point) phys contained in the port. All other values specify a struct scic_sds_phy + * object that is active in the port. + */ +static struct scic_sds_phy *scic_sds_port_get_a_connected_phy( + struct scic_sds_port *sci_port + ) { + u32 index; + struct scic_sds_phy *phy; + + for (index = 0; index < SCI_MAX_PHYS; index++) { + /* + * Ensure that the phy is both part of the port and currently + * connected to the remote end-point. */ + phy = sci_port->phy_table[index]; + if ( + (phy != NULL) + && scic_sds_port_active_phy(sci_port, phy) + ) { + return phy; + } + } + + return NULL; +} + +/** + * scic_sds_port_set_phy() - + * @out]: port The port object to which the phy assignement is being made. + * @out]: phy The phy which is being assigned to the port. + * + * This method attempts to make the assignment of the phy to the port. If + * successful the phy is assigned to the ports phy table. bool true if the phy + * assignment can be made. false if the phy assignement can not be made. This + * is a functional test that only fails if the phy is currently assigned to a + * different port. + */ +static enum sci_status scic_sds_port_set_phy( + struct scic_sds_port *port, + struct scic_sds_phy *phy) +{ + /* + * Check to see if we can add this phy to a port + * that means that the phy is not part of a port and that the port does + * not already have a phy assinged to the phy index. */ + if ( + (port->phy_table[phy->phy_index] == NULL) + && (scic_sds_phy_get_port(phy) == NULL) + && scic_sds_port_is_valid_phy_assignment(port, phy->phy_index) + ) { + /* + * Phy is being added in the stopped state so we are in MPC mode + * make logical port index = physical port index */ + port->logical_port_index = port->physical_port_index; + port->phy_table[phy->phy_index] = phy; + scic_sds_phy_set_port(phy, port); + + return SCI_SUCCESS; + } + + return SCI_FAILURE; +} + +/** + * scic_sds_port_clear_phy() - + * @out]: port The port from which the phy is being cleared. + * @out]: phy The phy being cleared from the port. + * + * This method will clear the phy assigned to this port. This method fails if + * this phy is not currently assinged to this port. bool true if the phy is + * removed from the port. false if this phy is not assined to this port. + */ +static enum sci_status scic_sds_port_clear_phy( + struct scic_sds_port *port, + struct scic_sds_phy *phy) +{ + /* Make sure that this phy is part of this port */ + if (port->phy_table[phy->phy_index] == phy && + scic_sds_phy_get_port(phy) == port) { + struct scic_sds_controller *scic = port->owning_controller; + struct isci_host *ihost = scic_to_ihost(scic); + + /* Yep it is assigned to this port so remove it */ + scic_sds_phy_set_port(phy, &ihost->ports[SCI_MAX_PORTS].sci); + port->phy_table[phy->phy_index] = NULL; + return SCI_SUCCESS; + } + + return SCI_FAILURE; +} + +/** + * scic_sds_port_add_phy() - + * @sci_port: This parameter specifies the port in which the phy will be added. + * @sci_phy: This parameter is the phy which is to be added to the port. + * + * This method will add a PHY to the selected port. This method returns an + * enum sci_status. SCI_SUCCESS the phy has been added to the port. Any other status + * is failre to add the phy to the port. + */ +enum sci_status scic_sds_port_add_phy( + struct scic_sds_port *sci_port, + struct scic_sds_phy *sci_phy) +{ + return sci_port->state_handlers->add_phy_handler( + sci_port, sci_phy); +} + + +/** + * scic_sds_port_remove_phy() - + * @sci_port: This parameter specifies the port in which the phy will be added. + * @sci_phy: This parameter is the phy which is to be added to the port. + * + * This method will remove the PHY from the selected PORT. This method returns + * an enum sci_status. SCI_SUCCESS the phy has been removed from the port. Any other + * status is failre to add the phy to the port. + */ +enum sci_status scic_sds_port_remove_phy( + struct scic_sds_port *sci_port, + struct scic_sds_phy *sci_phy) +{ + return sci_port->state_handlers->remove_phy_handler( + sci_port, sci_phy); +} + +/** + * This method requests the SAS address for the supplied SAS port from the SCI + * implementation. + * @sci_port: a handle corresponding to the SAS port for which to return the + * SAS address. + * @sas_address: This parameter specifies a pointer to a SAS address structure + * into which the core will copy the SAS address for the port. + * + */ +void scic_sds_port_get_sas_address( + struct scic_sds_port *sci_port, + struct sci_sas_address *sas_address) +{ + u32 index; + + sas_address->high = 0; + sas_address->low = 0; + + for (index = 0; index < SCI_MAX_PHYS; index++) { + if (sci_port->phy_table[index] != NULL) { + scic_sds_phy_get_sas_address(sci_port->phy_table[index], sas_address); + } + } +} + +/* + * This function requests the SAS address for the device directly attached to + * this SAS port. + * @sci_port: a handle corresponding to the SAS port for which to return the + * SAS address. + * @sas_address: This parameter specifies a pointer to a SAS address structure + * into which the core will copy the SAS address for the device directly + * attached to the port. + * + */ +void scic_sds_port_get_attached_sas_address( + struct scic_sds_port *sci_port, + struct sci_sas_address *sas_address) +{ + struct scic_sds_phy *sci_phy; + + /* + * Ensure that the phy is both part of the port and currently + * connected to the remote end-point. + */ + sci_phy = scic_sds_port_get_a_connected_phy(sci_port); + if (sci_phy) { + if (sci_phy->protocol != SCIC_SDS_PHY_PROTOCOL_SATA) { + scic_sds_phy_get_attached_sas_address(sci_phy, + sas_address); + } else { + scic_sds_phy_get_sas_address(sci_phy, sas_address); + sas_address->low += sci_phy->phy_index; + } + } else { + sas_address->high = 0; + sas_address->low = 0; + } +} + +/** + * scic_sds_port_construct_dummy_rnc() - create dummy rnc for si workaround + * + * @sci_port: logical port on which we need to create the remote node context + * @rni: remote node index for this remote node context. + * + * This routine will construct a dummy remote node context data structure + * This structure will be posted to the hardware to work around a scheduler + * error in the hardware. + */ +static void scic_sds_port_construct_dummy_rnc(struct scic_sds_port *sci_port, u16 rni) +{ + union scu_remote_node_context *rnc; + + rnc = &sci_port->owning_controller->remote_node_context_table[rni]; + + memset(rnc, 0, sizeof(union scu_remote_node_context)); + + rnc->ssp.remote_sas_address_hi = 0; + rnc->ssp.remote_sas_address_lo = 0; + + rnc->ssp.remote_node_index = rni; + rnc->ssp.remote_node_port_width = 1; + rnc->ssp.logical_port_index = sci_port->physical_port_index; + + rnc->ssp.nexus_loss_timer_enable = false; + rnc->ssp.check_bit = false; + rnc->ssp.is_valid = true; + rnc->ssp.is_remote_node_context = true; + rnc->ssp.function_number = 0; + rnc->ssp.arbitration_wait_time = 0; +} + +/** + * scic_sds_port_construct_dummy_task() - create dummy task for si workaround + * @sci_port The logical port on which we need to create the + * remote node context. + * context. + * @tci The remote node index for this remote node context. + * + * This routine will construct a dummy task context data structure. This + * structure will be posted to the hardwre to work around a scheduler error + * in the hardware. + * + */ +static void scic_sds_port_construct_dummy_task(struct scic_sds_port *sci_port, u16 tci) +{ + struct scu_task_context *task_context; + + task_context = scic_sds_controller_get_task_context_buffer(sci_port->owning_controller, tci); + + memset(task_context, 0, sizeof(struct scu_task_context)); + + task_context->abort = 0; + task_context->priority = 0; + task_context->initiator_request = 1; + task_context->connection_rate = 1; + task_context->protocol_engine_index = 0; + task_context->logical_port_index = sci_port->physical_port_index; + task_context->protocol_type = SCU_TASK_CONTEXT_PROTOCOL_SSP; + task_context->task_index = scic_sds_io_tag_get_index(tci); + task_context->valid = SCU_TASK_CONTEXT_VALID; + task_context->context_type = SCU_TASK_CONTEXT_TYPE; + + task_context->remote_node_index = sci_port->reserved_rni; + task_context->command_code = 0; + + task_context->link_layer_control = 0; + task_context->do_not_dma_ssp_good_response = 1; + task_context->strict_ordering = 0; + task_context->control_frame = 0; + task_context->timeout_enable = 0; + task_context->block_guard_enable = 0; + + task_context->address_modifier = 0; + + task_context->task_phase = 0x01; +} + +static void scic_sds_port_destroy_dummy_resources(struct scic_sds_port *sci_port) +{ + struct scic_sds_controller *scic = sci_port->owning_controller; + + if (sci_port->reserved_tci != SCU_DUMMY_INDEX) + scic_controller_free_io_tag(scic, sci_port->reserved_tci); + + if (sci_port->reserved_rni != SCU_DUMMY_INDEX) + scic_sds_remote_node_table_release_remote_node_index(&scic->available_remote_nodes, + 1, sci_port->reserved_rni); + + sci_port->reserved_rni = SCU_DUMMY_INDEX; + sci_port->reserved_tci = SCU_DUMMY_INDEX; +} + +/** + * This method performs initialization of the supplied port. Initialization + * includes: - state machine initialization - member variable initialization + * - configuring the phy_mask + * @sci_port: + * @transport_layer_registers: + * @port_task_scheduler_registers: + * @port_configuration_regsiter: + * + * enum sci_status SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION This value is returned + * if the phy being added to the port + */ +enum sci_status scic_sds_port_initialize( + struct scic_sds_port *sci_port, + void __iomem *port_task_scheduler_registers, + void __iomem *port_configuration_regsiter, + void __iomem *viit_registers) +{ + sci_port->port_task_scheduler_registers = port_task_scheduler_registers; + sci_port->port_pe_configuration_register = port_configuration_regsiter; + sci_port->viit_registers = viit_registers; + + return SCI_SUCCESS; +} + +/** + * scic_port_hard_reset() - perform port hard reset + * @port: a handle corresponding to the SAS port to be hard reset. + * @reset_timeout: This parameter specifies the number of milliseconds in which + * the port reset operation should complete. + * + * The SCI User callback in scic_user_callbacks_t will only be called once for + * each phy in the SAS Port at completion of the hard reset sequence. Return a + * status indicating whether the hard reset started successfully. SCI_SUCCESS + * This value is returned if the hard reset operation started successfully. + */ +static enum sci_status scic_port_hard_reset(struct scic_sds_port *port, + u32 reset_timeout) +{ + return port->state_handlers->reset_handler( + port, reset_timeout); +} + +/** + * This method assigns the direct attached device ID for this port. + * + * @param[in] sci_port The port for which the direct attached device id is to + * be assigned. + * @param[in] device_id The direct attached device ID to assign to the port. + * This will be the RNi for the device + */ +void scic_sds_port_setup_transports( + struct scic_sds_port *sci_port, + u32 device_id) +{ + u8 index; + + for (index = 0; index < SCI_MAX_PHYS; index++) { + if (sci_port->active_phy_mask & (1 << index)) + scic_sds_phy_setup_transport(sci_port->phy_table[index], device_id); + } +} + +/** + * + * @sci_port: This is the port on which the phy should be enabled. + * @sci_phy: This is the specific phy which to enable. + * @do_notify_user: This parameter specifies whether to inform the user (via + * scic_cb_port_link_up()) as to the fact that a new phy as become ready. + * + * This function will activate the phy in the port. + * Activation includes: - adding + * the phy to the port - enabling the Protocol Engine in the silicon. - + * notifying the user that the link is up. none + */ +static void scic_sds_port_activate_phy(struct scic_sds_port *sci_port, + struct scic_sds_phy *sci_phy, + bool do_notify_user) +{ + struct scic_sds_controller *scic = sci_port->owning_controller; + struct isci_host *ihost = scic_to_ihost(scic); + + if (sci_phy->protocol != SCIC_SDS_PHY_PROTOCOL_SATA) + scic_sds_phy_resume(sci_phy); + + sci_port->active_phy_mask |= 1 << sci_phy->phy_index; + + scic_sds_controller_clear_invalid_phy(scic, sci_phy); + + if (do_notify_user == true) + isci_port_link_up(ihost, sci_port, sci_phy); +} + +void scic_sds_port_deactivate_phy(struct scic_sds_port *sci_port, + struct scic_sds_phy *sci_phy, + bool do_notify_user) +{ + struct scic_sds_controller *scic = scic_sds_port_get_controller(sci_port); + struct isci_port *iport = sci_port_to_iport(sci_port); + struct isci_host *ihost = scic_to_ihost(scic); + struct isci_phy *iphy = sci_phy_to_iphy(sci_phy); + + sci_port->active_phy_mask &= ~(1 << sci_phy->phy_index); + + sci_phy->max_negotiated_speed = SAS_LINK_RATE_UNKNOWN; + + /* Re-assign the phy back to the LP as if it were a narrow port */ + writel(sci_phy->phy_index, + &sci_port->port_pe_configuration_register[sci_phy->phy_index]); + + if (do_notify_user == true) + isci_port_link_down(ihost, iphy, iport); +} + +/** + * + * @sci_port: This is the port on which the phy should be disabled. + * @sci_phy: This is the specific phy which to disabled. + * + * This function will disable the phy and report that the phy is not valid for + * this port object. None + */ +static void scic_sds_port_invalid_link_up(struct scic_sds_port *sci_port, + struct scic_sds_phy *sci_phy) +{ + struct scic_sds_controller *scic = sci_port->owning_controller; + + /* + * Check to see if we have alreay reported this link as bad and if + * not go ahead and tell the SCI_USER that we have discovered an + * invalid link. + */ + if ((scic->invalid_phy_mask & (1 << sci_phy->phy_index)) == 0) { + scic_sds_controller_set_invalid_phy(scic, sci_phy); + dev_warn(&scic_to_ihost(scic)->pdev->dev, "Invalid link up!\n"); + } +} + +/** + * scic_sds_port_general_link_up_handler - phy can be assigned to port? + * @sci_port: scic_sds_port object for which has a phy that has gone link up. + * @sci_phy: This is the struct scic_sds_phy object that has gone link up. + * @do_notify_user: This parameter specifies whether to inform the user (via + * scic_cb_port_link_up()) as to the fact that a new phy as become ready. + * + * Determine if this phy can be assigned to this + * port . If the phy is not a valid PHY for + * this port then the function will notify the user. A PHY can only be + * part of a port if it's attached SAS ADDRESS is the same as all other PHYs in + * the same port. none + */ +static void scic_sds_port_general_link_up_handler(struct scic_sds_port *sci_port, + struct scic_sds_phy *sci_phy, + bool do_notify_user) +{ + struct sci_sas_address port_sas_address; + struct sci_sas_address phy_sas_address; + + scic_sds_port_get_attached_sas_address(sci_port, &port_sas_address); + scic_sds_phy_get_attached_sas_address(sci_phy, &phy_sas_address); + + /* If the SAS address of the new phy matches the SAS address of + * other phys in the port OR this is the first phy in the port, + * then activate the phy and allow it to be used for operations + * in this port. + */ + if ((phy_sas_address.high == port_sas_address.high && + phy_sas_address.low == port_sas_address.low) || + sci_port->active_phy_mask == 0) { + struct sci_base_state_machine *sm = &sci_port->state_machine; + + scic_sds_port_activate_phy(sci_port, sci_phy, do_notify_user); + if (sm->current_state_id == SCI_BASE_PORT_STATE_RESETTING) + sci_base_state_machine_change_state(sm, SCI_BASE_PORT_STATE_READY); + } else + scic_sds_port_invalid_link_up(sci_port, sci_phy); +} + + + +/** + * This method returns false if the port only has a single phy object assigned. + * If there are no phys or more than one phy then the method will return + * true. + * @sci_port: The port for which the wide port condition is to be checked. + * + * bool true Is returned if this is a wide ported port. false Is returned if + * this is a narrow port. + */ +static bool scic_sds_port_is_wide(struct scic_sds_port *sci_port) +{ + u32 index; + u32 phy_count = 0; + + for (index = 0; index < SCI_MAX_PHYS; index++) { + if (sci_port->phy_table[index] != NULL) { + phy_count++; + } + } + + return phy_count != 1; +} + +/** + * This method is called by the PHY object when the link is detected. if the + * port wants the PHY to continue on to the link up state then the port + * layer must return true. If the port object returns false the phy object + * must halt its attempt to go link up. + * @sci_port: The port associated with the phy object. + * @sci_phy: The phy object that is trying to go link up. + * + * true if the phy object can continue to the link up condition. true Is + * returned if this phy can continue to the ready state. false Is returned if + * can not continue on to the ready state. This notification is in place for + * wide ports and direct attached phys. Since there are no wide ported SATA + * devices this could become an invalid port configuration. + */ +bool scic_sds_port_link_detected( + struct scic_sds_port *sci_port, + struct scic_sds_phy *sci_phy) +{ + if ((sci_port->logical_port_index != SCIC_SDS_DUMMY_PORT) && + (sci_phy->protocol == SCIC_SDS_PHY_PROTOCOL_SATA) && + scic_sds_port_is_wide(sci_port)) { + scic_sds_port_invalid_link_up(sci_port, sci_phy); + + return false; + } + + return true; +} + +/** + * This method is the entry point for the phy to inform the port that it is now + * in a ready state + * @sci_port: + * + * + */ +void scic_sds_port_link_up( + struct scic_sds_port *sci_port, + struct scic_sds_phy *sci_phy) +{ + sci_phy->is_in_link_training = false; + + sci_port->state_handlers->link_up_handler(sci_port, sci_phy); +} + +/** + * This method is the entry point for the phy to inform the port that it is no + * longer in a ready state + * @sci_port: + * + * + */ +void scic_sds_port_link_down( + struct scic_sds_port *sci_port, + struct scic_sds_phy *sci_phy) +{ + sci_port->state_handlers->link_down_handler(sci_port, sci_phy); +} + +/** + * This method is called to start an IO request on this port. + * @sci_port: + * @sci_dev: + * @sci_req: + * + * enum sci_status + */ +enum sci_status scic_sds_port_start_io( + struct scic_sds_port *sci_port, + struct scic_sds_remote_device *sci_dev, + struct scic_sds_request *sci_req) +{ + return sci_port->state_handlers->start_io_handler( + sci_port, sci_dev, sci_req); +} + +/** + * This method is called to complete an IO request to the port. + * @sci_port: + * @sci_dev: + * @sci_req: + * + * enum sci_status + */ +enum sci_status scic_sds_port_complete_io( + struct scic_sds_port *sci_port, + struct scic_sds_remote_device *sci_dev, + struct scic_sds_request *sci_req) +{ + return sci_port->state_handlers->complete_io_handler( + sci_port, sci_dev, sci_req); +} + +/** + * This method is provided to timeout requests for port operations. Mostly its + * for the port reset operation. + * + * + */ +static void scic_sds_port_timeout_handler(void *port) +{ + struct scic_sds_port *sci_port = port; + u32 current_state; + + current_state = sci_base_state_machine_get_state( + &sci_port->state_machine); + + if (current_state == SCI_BASE_PORT_STATE_RESETTING) { + /* + * if the port is still in the resetting state then the + * timeout fired before the reset completed. + */ + sci_base_state_machine_change_state( + &sci_port->state_machine, + SCI_BASE_PORT_STATE_FAILED); + } else if (current_state == SCI_BASE_PORT_STATE_STOPPED) { + /* + * if the port is stopped then the start request failed + * In this case stay in the stopped state. + */ + dev_err(sciport_to_dev(sci_port), + "%s: SCIC Port 0x%p failed to stop before tiemout.\n", + __func__, + sci_port); + } else if (current_state == SCI_BASE_PORT_STATE_STOPPING) { + /* + * if the port is still stopping then the stop has not + * completed + */ + isci_port_stop_complete( + scic_sds_port_get_controller(sci_port), + sci_port, + SCI_FAILURE_TIMEOUT); + } else { + /* + * The port is in the ready state and we have a timer + * reporting a timeout this should not happen. + */ + dev_err(sciport_to_dev(sci_port), + "%s: SCIC Port 0x%p is processing a timeout operation " + "in state %d.\n", + __func__, + sci_port, + current_state); + } +} + +/* --------------------------------------------------------------------------- */ + +/** + * This function updates the hardwares VIIT entry for this port. + * + * + */ +static void scic_sds_port_update_viit_entry(struct scic_sds_port *sci_port) +{ + struct sci_sas_address sas_address; + + scic_sds_port_get_sas_address(sci_port, &sas_address); + + writel(sas_address.high, + &sci_port->viit_registers->initiator_sas_address_hi); + writel(sas_address.low, + &sci_port->viit_registers->initiator_sas_address_lo); + + /* This value get cleared just in case its not already cleared */ + writel(0, &sci_port->viit_registers->reserved); + + /* We are required to update the status register last */ + writel(SCU_VIIT_ENTRY_ID_VIIT | + SCU_VIIT_IPPT_INITIATOR | + ((1 << sci_port->physical_port_index) << SCU_VIIT_ENTRY_LPVIE_SHIFT) | + SCU_VIIT_STATUS_ALL_VALID, + &sci_port->viit_registers->status); +} + +/** + * This method returns the maximum allowed speed for data transfers on this + * port. This maximum allowed speed evaluates to the maximum speed of the + * slowest phy in the port. + * @sci_port: This parameter specifies the port for which to retrieve the + * maximum allowed speed. + * + * This method returns the maximum negotiated speed of the slowest phy in the + * port. + */ +enum sas_linkrate scic_sds_port_get_max_allowed_speed( + struct scic_sds_port *sci_port) +{ + u16 index; + enum sas_linkrate max_allowed_speed = SAS_LINK_RATE_6_0_GBPS; + struct scic_sds_phy *phy = NULL; + + /* + * Loop through all of the phys in this port and find the phy with the + * lowest maximum link rate. */ + for (index = 0; index < SCI_MAX_PHYS; index++) { + phy = sci_port->phy_table[index]; + if ( + (phy != NULL) + && (scic_sds_port_active_phy(sci_port, phy) == true) + && (phy->max_negotiated_speed < max_allowed_speed) + ) + max_allowed_speed = phy->max_negotiated_speed; + } + + return max_allowed_speed; +} + +static void scic_port_enable_broadcast_change_notification(struct scic_sds_port *port) +{ + struct scic_sds_phy *phy; + u32 register_value; + u8 index; + + /* Loop through all of the phys to enable BCN. */ + for (index = 0; index < SCI_MAX_PHYS; index++) { + phy = port->phy_table[index]; + if (phy != NULL) { + register_value = + readl(&phy->link_layer_registers->link_layer_control); + + /* clear the bit by writing 1. */ + writel(register_value, + &phy->link_layer_registers->link_layer_control); + } + } +} + +/* + * **************************************************************************** + * * READY SUBSTATE HANDLERS + * **************************************************************************** */ + +/* + * This method is the general ready state stop handler for the struct scic_sds_port + * object. This function will transition the ready substate machine to its + * final state. enum sci_status SCI_SUCCESS + */ +static enum sci_status scic_sds_port_ready_substate_stop_handler( + struct scic_sds_port *port) +{ + sci_base_state_machine_change_state( + &port->state_machine, + SCI_BASE_PORT_STATE_STOPPING + ); + + return SCI_SUCCESS; +} + +/* + * This method is the general ready substate complete io handler for the + * struct scic_sds_port object. This function decrments the outstanding request count + * for this port object. enum sci_status SCI_SUCCESS + */ +static enum sci_status scic_sds_port_ready_substate_complete_io_handler( + struct scic_sds_port *port, + struct scic_sds_remote_device *device, + struct scic_sds_request *io_request) +{ + scic_sds_port_decrement_request_count(port); + + return SCI_SUCCESS; +} + +static enum sci_status scic_sds_port_ready_substate_add_phy_handler( + struct scic_sds_port *port, + struct scic_sds_phy *phy) +{ + enum sci_status status; + + status = scic_sds_port_set_phy(port, phy); + + if (status == SCI_SUCCESS) { + scic_sds_port_general_link_up_handler(port, phy, true); + + port->not_ready_reason = SCIC_PORT_NOT_READY_RECONFIGURING; + + sci_base_state_machine_change_state( + &port->ready_substate_machine, + SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING + ); + } + + return status; +} + + +static enum sci_status scic_sds_port_ready_substate_remove_phy_handler( + struct scic_sds_port *port, + struct scic_sds_phy *phy) +{ + enum sci_status status; + + status = scic_sds_port_clear_phy(port, phy); + + if (status == SCI_SUCCESS) { + scic_sds_port_deactivate_phy(port, phy, true); + + port->not_ready_reason = SCIC_PORT_NOT_READY_RECONFIGURING; + + sci_base_state_machine_change_state( + &port->ready_substate_machine, + SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING + ); + } + + return status; +} + +/* + * **************************************************************************** + * * READY SUBSTATE WAITING HANDLERS + * **************************************************************************** */ + +/** + * + * @sci_port: This is the struct scic_sds_port object that which has a phy that has + * gone link up. + * @sci_phy: This is the struct scic_sds_phy object that has gone link up. + * + * This method is the ready waiting substate link up handler for the + * struct scic_sds_port object. This methos will report the link up condition for + * this port and will transition to the ready operational substate. none + */ +static void scic_sds_port_ready_waiting_substate_link_up_handler( + struct scic_sds_port *sci_port, + struct scic_sds_phy *sci_phy) +{ + /* + * Since this is the first phy going link up for the port we can just enable + * it and continue. */ + scic_sds_port_activate_phy(sci_port, sci_phy, true); + + sci_base_state_machine_change_state( + &sci_port->ready_substate_machine, + SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL + ); +} + +/* + * This method is the ready waiting substate start io handler for the + * struct scic_sds_port object. The port object can not accept new requests so the + * request is failed. enum sci_status SCI_FAILURE_INVALID_STATE + */ +static enum sci_status scic_sds_port_ready_waiting_substate_start_io_handler( + struct scic_sds_port *port, + struct scic_sds_remote_device *device, + struct scic_sds_request *io_request) +{ + return SCI_FAILURE_INVALID_STATE; +} + +/* + * **************************************************************************** + * * READY SUBSTATE OPERATIONAL HANDLERS + * **************************************************************************** */ + +/* + * This method will casue the port to reset. enum sci_status SCI_SUCCESS + */ +static enum +sci_status scic_sds_port_ready_operational_substate_reset_handler( + struct scic_sds_port *port, + u32 timeout) +{ + enum sci_status status = SCI_FAILURE_INVALID_PHY; + u32 phy_index; + struct scic_sds_phy *selected_phy = NULL; + + + /* Select a phy on which we can send the hard reset request. */ + for (phy_index = 0; + (phy_index < SCI_MAX_PHYS) && (selected_phy == NULL); + phy_index++) { + selected_phy = port->phy_table[phy_index]; + + if ((selected_phy != NULL) && + !scic_sds_port_active_phy(port, selected_phy)) { + /* + * We found a phy but it is not ready select + * different phy + */ + selected_phy = NULL; + } + } + + /* If we have a phy then go ahead and start the reset procedure */ + if (selected_phy != NULL) { + status = scic_sds_phy_reset(selected_phy); + + if (status == SCI_SUCCESS) { + isci_timer_start(port->timer_handle, timeout); + port->not_ready_reason = + SCIC_PORT_NOT_READY_HARD_RESET_REQUESTED; + + sci_base_state_machine_change_state( + &port->state_machine, + SCI_BASE_PORT_STATE_RESETTING); + } + } + + return status; +} + +/** + * scic_sds_port_ready_operational_substate_link_up_handler() - + * @sci_port: This is the struct scic_sds_port object that which has a phy that has + * gone link up. + * @sci_phy: This is the struct scic_sds_phy object that has gone link up. + * + * This method is the ready operational substate link up handler for the + * struct scic_sds_port object. This function notifies the SCI User that the phy has + * gone link up. none + */ +static void scic_sds_port_ready_operational_substate_link_up_handler( + struct scic_sds_port *sci_port, + struct scic_sds_phy *sci_phy) +{ + scic_sds_port_general_link_up_handler(sci_port, sci_phy, true); +} + +/** + * scic_sds_port_ready_operational_substate_link_down_handler() - + * @sci_port: This is the struct scic_sds_port object that which has a phy that has + * gone link down. + * @sci_phy: This is the struct scic_sds_phy object that has gone link down. + * + * This method is the ready operational substate link down handler for the + * struct scic_sds_port object. This function notifies the SCI User that the phy has + * gone link down and if this is the last phy in the port the port will change + * state to the ready waiting substate. none + */ +static void scic_sds_port_ready_operational_substate_link_down_handler( + struct scic_sds_port *sci_port, + struct scic_sds_phy *sci_phy) +{ + scic_sds_port_deactivate_phy(sci_port, sci_phy, true); + + /* + * If there are no active phys left in the port, then transition + * the port to the WAITING state until such time as a phy goes + * link up. */ + if (sci_port->active_phy_mask == 0) + sci_base_state_machine_change_state(&sci_port->ready_substate_machine, + SCIC_SDS_PORT_READY_SUBSTATE_WAITING); +} + +/* + * This method is the ready operational substate start io handler for the + * struct scic_sds_port object. This function incremetns the outstanding request + * count for this port object. enum sci_status SCI_SUCCESS + */ +static enum sci_status scic_sds_port_ready_operational_substate_start_io_handler( + struct scic_sds_port *port, + struct scic_sds_remote_device *device, + struct scic_sds_request *io_request) +{ + port->started_request_count++; + return SCI_SUCCESS; +} + +/* + * **************************************************************************** + * * READY SUBSTATE OPERATIONAL HANDLERS + * **************************************************************************** */ + +/* + * This is the default method for a port add phy request. It will report a + * warning and exit. enum sci_status SCI_FAILURE_INVALID_STATE + */ +static enum sci_status scic_sds_port_ready_configuring_substate_add_phy_handler( + struct scic_sds_port *port, + struct scic_sds_phy *phy) +{ + enum sci_status status; + + status = scic_sds_port_set_phy(port, phy); + + if (status == SCI_SUCCESS) { + scic_sds_port_general_link_up_handler(port, phy, true); + + /* + * Re-enter the configuring state since this may be the last phy in + * the port. */ + sci_base_state_machine_change_state( + &port->ready_substate_machine, + SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING + ); + } + + return status; +} + +/* + * This is the default method for a port remove phy request. It will report a + * warning and exit. enum sci_status SCI_FAILURE_INVALID_STATE + */ +static enum sci_status scic_sds_port_ready_configuring_substate_remove_phy_handler( + struct scic_sds_port *port, + struct scic_sds_phy *phy) +{ + enum sci_status status; + + status = scic_sds_port_clear_phy(port, phy); + + if (status == SCI_SUCCESS) { + scic_sds_port_deactivate_phy(port, phy, true); + + /* + * Re-enter the configuring state since this may be the last phy in + * the port. */ + sci_base_state_machine_change_state( + &port->ready_substate_machine, + SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING + ); + } + + return status; +} + +/** + * scic_sds_port_ready_configuring_substate_complete_io_handler() - + * @port: This is the port that is being requested to complete the io request. + * @device: This is the device on which the io is completing. + * + * This method will decrement the outstanding request count for this port. If + * the request count goes to 0 then the port can be reprogrammed with its new + * phy data. + */ +static enum sci_status +scic_sds_port_ready_configuring_substate_complete_io_handler( + struct scic_sds_port *port, + struct scic_sds_remote_device *device, + struct scic_sds_request *io_request) +{ + scic_sds_port_decrement_request_count(port); + + if (port->started_request_count == 0) { + sci_base_state_machine_change_state( + &port->ready_substate_machine, + SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL + ); + } + + return SCI_SUCCESS; +} + +static enum sci_status default_port_handler(struct scic_sds_port *sci_port, + const char *func) +{ + dev_warn(sciport_to_dev(sci_port), + "%s: in wrong state: %d\n", func, + sci_base_state_machine_get_state(&sci_port->state_machine)); + return SCI_FAILURE_INVALID_STATE; +} + +static enum sci_status +scic_sds_port_default_start_handler(struct scic_sds_port *sci_port) +{ + return default_port_handler(sci_port, __func__); +} + +static enum sci_status +scic_sds_port_default_stop_handler(struct scic_sds_port *sci_port) +{ + return default_port_handler(sci_port, __func__); +} + +static enum sci_status +scic_sds_port_default_destruct_handler(struct scic_sds_port *sci_port) +{ + return default_port_handler(sci_port, __func__); +} + +static enum sci_status +scic_sds_port_default_reset_handler(struct scic_sds_port *sci_port, + u32 timeout) +{ + return default_port_handler(sci_port, __func__); +} + +static enum sci_status +scic_sds_port_default_add_phy_handler(struct scic_sds_port *sci_port, + struct scic_sds_phy *base_phy) +{ + return default_port_handler(sci_port, __func__); +} + +static enum sci_status +scic_sds_port_default_remove_phy_handler(struct scic_sds_port *sci_port, + struct scic_sds_phy *base_phy) +{ + return default_port_handler(sci_port, __func__); +} + +/* + * This is the default method for a port unsolicited frame request. It will + * report a warning and exit. enum sci_status SCI_FAILURE_INVALID_STATE Is it even + * possible to receive an unsolicited frame directed to a port object? It + * seems possible if we implementing virtual functions but until then? + */ +static enum sci_status +scic_sds_port_default_frame_handler(struct scic_sds_port *sci_port, + u32 frame_index) +{ + struct scic_sds_controller *scic = scic_sds_port_get_controller(sci_port); + + default_port_handler(sci_port, __func__); + scic_sds_controller_release_frame(scic, frame_index); + + return SCI_FAILURE_INVALID_STATE; +} + +static enum sci_status scic_sds_port_default_event_handler(struct scic_sds_port *sci_port, + u32 event_code) +{ + return default_port_handler(sci_port, __func__); +} + +static void scic_sds_port_default_link_up_handler(struct scic_sds_port *sci_port, + struct scic_sds_phy *sci_phy) +{ + default_port_handler(sci_port, __func__); +} + +static void scic_sds_port_default_link_down_handler(struct scic_sds_port *sci_port, + struct scic_sds_phy *sci_phy) +{ + default_port_handler(sci_port, __func__); +} + +static enum sci_status scic_sds_port_default_start_io_handler(struct scic_sds_port *sci_port, + struct scic_sds_remote_device *sci_dev, + struct scic_sds_request *sci_req) +{ + return default_port_handler(sci_port, __func__); +} + +static enum sci_status scic_sds_port_default_complete_io_handler(struct scic_sds_port *sci_port, + struct scic_sds_remote_device *sci_dev, + struct scic_sds_request *sci_req) +{ + return default_port_handler(sci_port, __func__); +} + + + +static struct scic_sds_port_state_handler +scic_sds_port_ready_substate_handler_table[SCIC_SDS_PORT_READY_MAX_SUBSTATES] = { + { + /* SCIC_SDS_PORT_READY_SUBSTATE_WAITING */ + scic_sds_port_default_start_handler, + scic_sds_port_ready_substate_stop_handler, + scic_sds_port_default_destruct_handler, + scic_sds_port_default_reset_handler, + scic_sds_port_ready_substate_add_phy_handler, + scic_sds_port_default_remove_phy_handler, + scic_sds_port_default_frame_handler, + scic_sds_port_default_event_handler, + scic_sds_port_ready_waiting_substate_link_up_handler, + scic_sds_port_default_link_down_handler, + scic_sds_port_ready_waiting_substate_start_io_handler, + scic_sds_port_ready_substate_complete_io_handler, + }, + + { + /* SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL */ + scic_sds_port_default_start_handler, + scic_sds_port_ready_substate_stop_handler, + scic_sds_port_default_destruct_handler, + scic_sds_port_ready_operational_substate_reset_handler, + scic_sds_port_ready_substate_add_phy_handler, + scic_sds_port_ready_substate_remove_phy_handler, + scic_sds_port_default_frame_handler, + scic_sds_port_default_event_handler, + scic_sds_port_ready_operational_substate_link_up_handler, + scic_sds_port_ready_operational_substate_link_down_handler, + scic_sds_port_ready_operational_substate_start_io_handler, + scic_sds_port_ready_substate_complete_io_handler, + }, + + { + /* SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING */ + scic_sds_port_default_start_handler, + scic_sds_port_ready_substate_stop_handler, + scic_sds_port_default_destruct_handler, + scic_sds_port_default_reset_handler, + scic_sds_port_ready_configuring_substate_add_phy_handler, + scic_sds_port_ready_configuring_substate_remove_phy_handler, + scic_sds_port_default_frame_handler, + scic_sds_port_default_event_handler, + scic_sds_port_default_link_up_handler, + scic_sds_port_default_link_down_handler, + scic_sds_port_default_start_io_handler, + scic_sds_port_ready_configuring_substate_complete_io_handler + } +}; + +/** + * scic_sds_port_set_ready_state_handlers() - + * + * This macro sets the port ready substate handlers. + */ +#define scic_sds_port_set_ready_state_handlers(port, state_id) \ + scic_sds_port_set_state_handlers(\ + port, &scic_sds_port_ready_substate_handler_table[(state_id)] \ + ) + +/* + * ****************************************************************************** + * * PORT STATE PRIVATE METHODS + * ****************************************************************************** */ + +/** + * + * @sci_port: This is the struct scic_sds_port object to suspend. + * + * This method will susped the port task scheduler for this port object. none + */ +static void +scic_sds_port_suspend_port_task_scheduler(struct scic_sds_port *port) +{ + u32 pts_control_value; + + pts_control_value = readl(&port->port_task_scheduler_registers->control); + pts_control_value |= SCU_PTSxCR_GEN_BIT(SUSPEND); + writel(pts_control_value, &port->port_task_scheduler_registers->control); +} + +/** + * scic_sds_port_post_dummy_request() - post dummy/workaround request + * @sci_port: port to post task + * + * Prevent the hardware scheduler from posting new requests to the front + * of the scheduler queue causing a starvation problem for currently + * ongoing requests. + * + */ +static void scic_sds_port_post_dummy_request(struct scic_sds_port *sci_port) +{ + u32 command; + struct scu_task_context *task_context; + struct scic_sds_controller *scic = sci_port->owning_controller; + u16 tci = sci_port->reserved_tci; + + task_context = scic_sds_controller_get_task_context_buffer(scic, tci); + + task_context->abort = 0; + + command = SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_TC | + sci_port->physical_port_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT | + tci; + + scic_sds_controller_post_request(scic, command); +} + +/** + * This routine will abort the dummy request. This will alow the hardware to + * power down parts of the silicon to save power. + * + * @sci_port: The port on which the task must be aborted. + * + */ +static void scic_sds_port_abort_dummy_request(struct scic_sds_port *sci_port) +{ + struct scic_sds_controller *scic = sci_port->owning_controller; + u16 tci = sci_port->reserved_tci; + struct scu_task_context *tc; + u32 command; + + tc = scic_sds_controller_get_task_context_buffer(scic, tci); + + tc->abort = 1; + + command = SCU_CONTEXT_COMMAND_REQUEST_POST_TC_ABORT | + sci_port->physical_port_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT | + tci; + + scic_sds_controller_post_request(scic, command); +} + +/** + * + * @sci_port: This is the struct scic_sds_port object to resume. + * + * This method will resume the port task scheduler for this port object. none + */ +static void +scic_sds_port_resume_port_task_scheduler(struct scic_sds_port *port) +{ + u32 pts_control_value; + + pts_control_value = readl(&port->port_task_scheduler_registers->control); + pts_control_value &= ~SCU_PTSxCR_GEN_BIT(SUSPEND); + writel(pts_control_value, &port->port_task_scheduler_registers->control); +} + +/* + * ****************************************************************************** + * * PORT READY SUBSTATE METHODS + * ****************************************************************************** */ + +/** + * + * @object: This is the object which is cast to a struct scic_sds_port object. + * + * This method will perform the actions required by the struct scic_sds_port on + * entering the SCIC_SDS_PORT_READY_SUBSTATE_WAITING. This function checks the + * port for any ready phys. If there is at least one phy in a ready state then + * the port transitions to the ready operational substate. none + */ +static void scic_sds_port_ready_substate_waiting_enter(void *object) +{ + struct scic_sds_port *sci_port = object; + + scic_sds_port_set_ready_state_handlers( + sci_port, SCIC_SDS_PORT_READY_SUBSTATE_WAITING + ); + + scic_sds_port_suspend_port_task_scheduler(sci_port); + + sci_port->not_ready_reason = SCIC_PORT_NOT_READY_NO_ACTIVE_PHYS; + + if (sci_port->active_phy_mask != 0) { + /* At least one of the phys on the port is ready */ + sci_base_state_machine_change_state( + &sci_port->ready_substate_machine, + SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL + ); + } +} + +/** + * + * @object: This is the object which is cast to a struct scic_sds_port object. + * + * This function will perform the actions required by the struct scic_sds_port + * on entering the SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL. This function sets + * the state handlers for the port object, notifies the SCI User that the port + * is ready, and resumes port operations. none + */ +static void scic_sds_port_ready_substate_operational_enter(void *object) +{ + u32 index; + struct scic_sds_port *sci_port = object; + struct scic_sds_controller *scic = sci_port->owning_controller; + struct isci_host *ihost = scic_to_ihost(scic); + struct isci_port *iport = sci_port_to_iport(sci_port); + + scic_sds_port_set_ready_state_handlers( + sci_port, + SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL); + + isci_port_ready(ihost, iport); + + for (index = 0; index < SCI_MAX_PHYS; index++) { + if (sci_port->phy_table[index]) { + writel(sci_port->physical_port_index, + &sci_port->port_pe_configuration_register[ + sci_port->phy_table[index]->phy_index]); + } + } + + scic_sds_port_update_viit_entry(sci_port); + + scic_sds_port_resume_port_task_scheduler(sci_port); + + /* + * Post the dummy task for the port so the hardware can schedule + * io correctly + */ + scic_sds_port_post_dummy_request(sci_port); +} + +/** + * + * @object: This is the object which is cast to a struct scic_sds_port object. + * + * This method will perform the actions required by the struct scic_sds_port on + * exiting the SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL. This function reports + * the port not ready and suspends the port task scheduler. none + */ +static void scic_sds_port_ready_substate_operational_exit(void *object) +{ + struct scic_sds_port *sci_port = object; + struct scic_sds_controller *scic = sci_port->owning_controller; + struct isci_host *ihost = scic_to_ihost(scic); + struct isci_port *iport = sci_port_to_iport(sci_port); + + /* + * Kill the dummy task for this port if it has not yet posted + * the hardware will treat this as a NOP and just return abort + * complete. + */ + scic_sds_port_abort_dummy_request(sci_port); + + isci_port_not_ready(ihost, iport); +} + +/* + * ****************************************************************************** + * * PORT READY CONFIGURING METHODS + * ****************************************************************************** */ + +/** + * scic_sds_port_ready_substate_configuring_enter() - + * @object: This is the object which is cast to a struct scic_sds_port object. + * + * This method will perform the actions required by the struct scic_sds_port on + * exiting the SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL. This function reports + * the port not ready and suspends the port task scheduler. none + */ +static void scic_sds_port_ready_substate_configuring_enter(void *object) +{ + struct scic_sds_port *sci_port = object; + struct scic_sds_controller *scic = sci_port->owning_controller; + struct isci_host *ihost = scic_to_ihost(scic); + struct isci_port *iport = sci_port_to_iport(sci_port); + + scic_sds_port_set_ready_state_handlers( + sci_port, + SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING); + + if (sci_port->active_phy_mask == 0) { + isci_port_not_ready(ihost, iport); + + sci_base_state_machine_change_state( + &sci_port->ready_substate_machine, + SCIC_SDS_PORT_READY_SUBSTATE_WAITING); + } else if (sci_port->started_request_count == 0) + sci_base_state_machine_change_state( + &sci_port->ready_substate_machine, + SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL); +} + +static void scic_sds_port_ready_substate_configuring_exit(void *object) +{ + struct scic_sds_port *sci_port = object; + + scic_sds_port_suspend_port_task_scheduler(sci_port); +} + +/* --------------------------------------------------------------------------- */ + +static const struct sci_base_state scic_sds_port_ready_substate_table[] = { + [SCIC_SDS_PORT_READY_SUBSTATE_WAITING] = { + .enter_state = scic_sds_port_ready_substate_waiting_enter, + }, + [SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL] = { + .enter_state = scic_sds_port_ready_substate_operational_enter, + .exit_state = scic_sds_port_ready_substate_operational_exit + }, + [SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING] = { + .enter_state = scic_sds_port_ready_substate_configuring_enter, + .exit_state = scic_sds_port_ready_substate_configuring_exit + }, +}; + +/** + * + * @port: This is the struct scic_sds_port object on which the io request count will + * be decremented. + * @device: This is the struct scic_sds_remote_device object to which the io request + * is being directed. This parameter is not required to complete this + * operation. + * @io_request: This is the request that is being completed on this port + * object. This parameter is not required to complete this operation. + * + * This is a general complete io request handler for the struct scic_sds_port object. + * enum sci_status SCI_SUCCESS + */ +static enum sci_status scic_sds_port_general_complete_io_handler( + struct scic_sds_port *port, + struct scic_sds_remote_device *device, + struct scic_sds_request *io_request) +{ + scic_sds_port_decrement_request_count(port); + + return SCI_SUCCESS; +} + +/** + * scic_sds_port_stopped_state_start_handler() - stop a port from "started" + * + * @port: This is the struct scic_sds_port object which is cast into a + * struct scic_sds_port object. + * + * This function takes the struct scic_sds_port from a stopped state and + * attempts to start it. To start a port it must have no assiged devices and + * it must have at least one phy assigned to it. If those conditions are + * met then the port can transition to the ready state. + * enum sci_status + * SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION + * This struct scic_sds_port object could not be started because the port + * configuration is not valid. + * SCI_SUCCESS + * the start request is successful and the struct scic_sds_port object + * has transitioned to the SCI_BASE_PORT_STATE_READY. + */ +static enum sci_status +scic_sds_port_stopped_state_start_handler(struct scic_sds_port *sci_port) +{ + struct scic_sds_controller *scic = sci_port->owning_controller; + struct isci_host *ihost = scic_to_ihost(scic); + enum sci_status status = SCI_SUCCESS; + u32 phy_mask; + + if (sci_port->assigned_device_count > 0) { + /* + * @todo This is a start failure operation because + * there are still devices assigned to this port. + * There must be no devices assigned to a port on a + * start operation. + */ + return SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION; + } + + sci_port->timer_handle = + isci_timer_create(ihost, + sci_port, + scic_sds_port_timeout_handler); + + if (!sci_port->timer_handle) + return SCI_FAILURE_INSUFFICIENT_RESOURCES; + + if (sci_port->reserved_rni == SCU_DUMMY_INDEX) { + u16 rni = scic_sds_remote_node_table_allocate_remote_node( + &scic->available_remote_nodes, 1); + + if (rni != SCU_DUMMY_INDEX) + scic_sds_port_construct_dummy_rnc(sci_port, rni); + else + status = SCI_FAILURE_INSUFFICIENT_RESOURCES; + sci_port->reserved_rni = rni; + } + + if (sci_port->reserved_tci == SCU_DUMMY_INDEX) { + /* Allocate a TCI and remove the sequence nibble */ + u16 tci = scic_controller_allocate_io_tag(scic); + + if (tci != SCU_DUMMY_INDEX) + scic_sds_port_construct_dummy_task(sci_port, tci); + else + status = SCI_FAILURE_INSUFFICIENT_RESOURCES; + sci_port->reserved_tci = tci; + } + + if (status == SCI_SUCCESS) { + phy_mask = scic_sds_port_get_phys(sci_port); + + /* + * There are one or more phys assigned to this port. Make sure + * the port's phy mask is in fact legal and supported by the + * silicon. + */ + if (scic_sds_port_is_phy_mask_valid(sci_port, phy_mask) == true) { + sci_base_state_machine_change_state( + &sci_port->state_machine, + SCI_BASE_PORT_STATE_READY); + + return SCI_SUCCESS; + } else + status = SCI_FAILURE; + } + + if (status != SCI_SUCCESS) + scic_sds_port_destroy_dummy_resources(sci_port); + + return status; +} + +/* + * This method takes the struct scic_sds_port that is in a stopped state and handles a + * stop request. This function takes no action. enum sci_status SCI_SUCCESS the + * stop request is successful as the struct scic_sds_port object is already stopped. + */ +static enum sci_status scic_sds_port_stopped_state_stop_handler( + struct scic_sds_port *port) +{ + /* We are already stopped so there is nothing to do here */ + return SCI_SUCCESS; +} + +/* + * This method takes the struct scic_sds_port that is in a stopped state and handles + * the destruct request. The stopped state is the only state in which the + * struct scic_sds_port can be destroyed. This function causes the port object to + * transition to the SCI_BASE_PORT_STATE_FINAL. enum sci_status SCI_SUCCESS + */ +static enum sci_status scic_sds_port_stopped_state_destruct_handler( + struct scic_sds_port *port) +{ + sci_base_state_machine_stop(&port->state_machine); + + return SCI_SUCCESS; +} + +/* + * This method takes the struct scic_sds_port that is in a stopped state and handles + * the add phy request. In MPC mode the only time a phy can be added to a port + * is in the SCI_BASE_PORT_STATE_STOPPED. enum sci_status + * SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION is returned when the phy can not + * be added to the port. SCI_SUCCESS if the phy is added to the port. + */ +static enum sci_status scic_sds_port_stopped_state_add_phy_handler( + struct scic_sds_port *port, + struct scic_sds_phy *phy) +{ + struct sci_sas_address port_sas_address; + + /* Read the port assigned SAS Address if there is one */ + scic_sds_port_get_sas_address(port, &port_sas_address); + + if (port_sas_address.high != 0 && port_sas_address.low != 0) { + struct sci_sas_address phy_sas_address; + + /* + * Make sure that the PHY SAS Address matches the SAS Address + * for this port. */ + scic_sds_phy_get_sas_address(phy, &phy_sas_address); + + if ( + (port_sas_address.high != phy_sas_address.high) + || (port_sas_address.low != phy_sas_address.low) + ) { + return SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION; + } + } + + return scic_sds_port_set_phy(port, phy); +} + +/* + * This method takes the struct scic_sds_port that is in a stopped state and handles + * the remove phy request. In MPC mode the only time a phy can be removed from + * a port is in the SCI_BASE_PORT_STATE_STOPPED. enum sci_status + * SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION is returned when the phy can not + * be added to the port. SCI_SUCCESS if the phy is added to the port. + */ +static enum sci_status scic_sds_port_stopped_state_remove_phy_handler( + struct scic_sds_port *port, + struct scic_sds_phy *phy) +{ + return scic_sds_port_clear_phy(port, phy); +} + +/* + * **************************************************************************** + * * READY STATE HANDLERS + * **************************************************************************** */ + +/* + * **************************************************************************** + * * RESETTING STATE HANDLERS + * **************************************************************************** */ + +/* + * **************************************************************************** + * * STOPPING STATE HANDLERS + * **************************************************************************** */ + +/* + * This method takes the struct scic_sds_port that is in a stopping state and handles + * the complete io request. Should the request count reach 0 then the port + * object will transition to the stopped state. enum sci_status SCI_SUCCESS + */ +static enum sci_status scic_sds_port_stopping_state_complete_io_handler( + struct scic_sds_port *sci_port, + struct scic_sds_remote_device *device, + struct scic_sds_request *io_request) +{ + scic_sds_port_decrement_request_count(sci_port); + + if (sci_port->started_request_count == 0) { + sci_base_state_machine_change_state(&sci_port->state_machine, + SCI_BASE_PORT_STATE_STOPPED); + } + + return SCI_SUCCESS; +} + +/* + * **************************************************************************** + * * RESETTING STATE HANDLERS + * **************************************************************************** */ + +/** + * + * @port: This is the port object which is being requested to stop. + * + * This method will stop a failed port. This causes a transition to the + * stopping state. enum sci_status SCI_SUCCESS + */ +static enum sci_status scic_sds_port_reset_state_stop_handler( + struct scic_sds_port *port) +{ + sci_base_state_machine_change_state( + &port->state_machine, + SCI_BASE_PORT_STATE_STOPPING + ); + + return SCI_SUCCESS; +} + +/* + * This method will transition a failed port to its ready state. The port + * failed because a hard reset request timed out but at some time later one or + * more phys in the port became ready. enum sci_status SCI_SUCCESS + */ +static void scic_sds_port_reset_state_link_up_handler( + struct scic_sds_port *port, + struct scic_sds_phy *phy) +{ + /* + * / @todo We should make sure that the phy that has gone link up is the same + * / one on which we sent the reset. It is possible that the phy on + * / which we sent the reset is not the one that has gone link up and we + * / want to make sure that phy being reset comes back. Consider the + * / case where a reset is sent but before the hardware processes the + * / reset it get a link up on the port because of a hot plug event. + * / because of the reset request this phy will go link down almost + * / immediately. */ + + /* + * In the resetting state we don't notify the user regarding + * link up and link down notifications. */ + scic_sds_port_general_link_up_handler(port, phy, false); +} + +/* + * This method process link down notifications that occur during a port reset + * operation. Link downs can occur during the reset operation. enum sci_status + * SCI_SUCCESS + */ +static void scic_sds_port_reset_state_link_down_handler( + struct scic_sds_port *port, + struct scic_sds_phy *phy) +{ + /* + * In the resetting state we don't notify the user regarding + * link up and link down notifications. */ + scic_sds_port_deactivate_phy(port, phy, false); +} + +static struct scic_sds_port_state_handler +scic_sds_port_state_handler_table[SCI_BASE_PORT_MAX_STATES] = +{ + /* SCI_BASE_PORT_STATE_STOPPED */ + { + scic_sds_port_stopped_state_start_handler, + scic_sds_port_stopped_state_stop_handler, + scic_sds_port_stopped_state_destruct_handler, + scic_sds_port_default_reset_handler, + scic_sds_port_stopped_state_add_phy_handler, + scic_sds_port_stopped_state_remove_phy_handler, + scic_sds_port_default_frame_handler, + scic_sds_port_default_event_handler, + scic_sds_port_default_link_up_handler, + scic_sds_port_default_link_down_handler, + scic_sds_port_default_start_io_handler, + scic_sds_port_default_complete_io_handler + }, + /* SCI_BASE_PORT_STATE_STOPPING */ + { + scic_sds_port_default_start_handler, + scic_sds_port_default_stop_handler, + scic_sds_port_default_destruct_handler, + scic_sds_port_default_reset_handler, + scic_sds_port_default_add_phy_handler, + scic_sds_port_default_remove_phy_handler, + scic_sds_port_default_frame_handler, + scic_sds_port_default_event_handler, + scic_sds_port_default_link_up_handler, + scic_sds_port_default_link_down_handler, + scic_sds_port_default_start_io_handler, + scic_sds_port_stopping_state_complete_io_handler + }, + /* SCI_BASE_PORT_STATE_READY */ + { + scic_sds_port_default_start_handler, + scic_sds_port_default_stop_handler, + scic_sds_port_default_destruct_handler, + scic_sds_port_default_reset_handler, + scic_sds_port_default_add_phy_handler, + scic_sds_port_default_remove_phy_handler, + scic_sds_port_default_frame_handler, + scic_sds_port_default_event_handler, + scic_sds_port_default_link_up_handler, + scic_sds_port_default_link_down_handler, + scic_sds_port_default_start_io_handler, + scic_sds_port_general_complete_io_handler + }, + /* SCI_BASE_PORT_STATE_RESETTING */ + { + scic_sds_port_default_start_handler, + scic_sds_port_reset_state_stop_handler, + scic_sds_port_default_destruct_handler, + scic_sds_port_default_reset_handler, + scic_sds_port_default_add_phy_handler, + scic_sds_port_default_remove_phy_handler, + scic_sds_port_default_frame_handler, + scic_sds_port_default_event_handler, + scic_sds_port_reset_state_link_up_handler, + scic_sds_port_reset_state_link_down_handler, + scic_sds_port_default_start_io_handler, + scic_sds_port_general_complete_io_handler + }, + /* SCI_BASE_PORT_STATE_FAILED */ + { + scic_sds_port_default_start_handler, + scic_sds_port_default_stop_handler, + scic_sds_port_default_destruct_handler, + scic_sds_port_default_reset_handler, + scic_sds_port_default_add_phy_handler, + scic_sds_port_default_remove_phy_handler, + scic_sds_port_default_frame_handler, + scic_sds_port_default_event_handler, + scic_sds_port_default_link_up_handler, + scic_sds_port_default_link_down_handler, + scic_sds_port_default_start_io_handler, + scic_sds_port_general_complete_io_handler + } +}; + +/* + * ****************************************************************************** + * * PORT STATE PRIVATE METHODS + * ****************************************************************************** */ + +/** + * + * @sci_port: This is the port object which to suspend. + * + * This method will enable the SCU Port Task Scheduler for this port object but + * will leave the port task scheduler in a suspended state. none + */ +static void +scic_sds_port_enable_port_task_scheduler(struct scic_sds_port *port) +{ + u32 pts_control_value; + + pts_control_value = readl(&port->port_task_scheduler_registers->control); + pts_control_value |= SCU_PTSxCR_GEN_BIT(ENABLE) | SCU_PTSxCR_GEN_BIT(SUSPEND); + writel(pts_control_value, &port->port_task_scheduler_registers->control); +} + +/** + * + * @sci_port: This is the port object which to resume. + * + * This method will disable the SCU port task scheduler for this port object. + * none + */ +static void +scic_sds_port_disable_port_task_scheduler(struct scic_sds_port *port) +{ + u32 pts_control_value; + + pts_control_value = readl(&port->port_task_scheduler_registers->control); + pts_control_value &= + ~(SCU_PTSxCR_GEN_BIT(ENABLE) | SCU_PTSxCR_GEN_BIT(SUSPEND)); + writel(pts_control_value, &port->port_task_scheduler_registers->control); +} + +static void scic_sds_port_post_dummy_remote_node(struct scic_sds_port *sci_port) +{ + struct scic_sds_controller *scic = sci_port->owning_controller; + u8 phys_index = sci_port->physical_port_index; + union scu_remote_node_context *rnc; + u16 rni = sci_port->reserved_rni; + u32 command; + + rnc = &scic->remote_node_context_table[rni]; + rnc->ssp.is_valid = true; + + command = SCU_CONTEXT_COMMAND_POST_RNC_32 | + phys_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT | rni; + + scic_sds_controller_post_request(scic, command); + + /* ensure hardware has seen the post rnc command and give it + * ample time to act before sending the suspend + */ + readl(&scic->smu_registers->interrupt_status); /* flush */ + udelay(10); + + command = SCU_CONTEXT_COMMAND_POST_RNC_SUSPEND_TX_RX | + phys_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT | rni; + + scic_sds_controller_post_request(scic, command); +} + +static void scic_sds_port_invalidate_dummy_remote_node(struct scic_sds_port *sci_port) +{ + struct scic_sds_controller *scic = sci_port->owning_controller; + u8 phys_index = sci_port->physical_port_index; + union scu_remote_node_context *rnc; + u16 rni = sci_port->reserved_rni; + u32 command; + + rnc = &scic->remote_node_context_table[rni]; + + rnc->ssp.is_valid = false; + + /* ensure the preceding tc abort request has reached the + * controller and give it ample time to act before posting the rnc + * invalidate + */ + readl(&scic->smu_registers->interrupt_status); /* flush */ + udelay(10); + + command = SCU_CONTEXT_COMMAND_POST_RNC_INVALIDATE | + phys_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT | rni; + + scic_sds_controller_post_request(scic, command); +} + +/* + * ****************************************************************************** + * * PORT STATE METHODS + * ****************************************************************************** */ + +/** + * + * @object: This is the object which is cast to a struct scic_sds_port object. + * + * This method will perform the actions required by the struct scic_sds_port on + * entering the SCI_BASE_PORT_STATE_STOPPED. This function sets the stopped + * state handlers for the struct scic_sds_port object and disables the port task + * scheduler in the hardware. none + */ +static void scic_sds_port_stopped_state_enter(void *object) +{ + struct scic_sds_port *sci_port = object; + + scic_sds_port_set_base_state_handlers( + sci_port, SCI_BASE_PORT_STATE_STOPPED + ); + + if ( + SCI_BASE_PORT_STATE_STOPPING + == sci_port->state_machine.previous_state_id + ) { + /* + * If we enter this state becasuse of a request to stop + * the port then we want to disable the hardwares port + * task scheduler. */ + scic_sds_port_disable_port_task_scheduler(sci_port); + } +} + +/** + * + * @object: This is the object which is cast to a struct scic_sds_port object. + * + * This method will perform the actions required by the struct scic_sds_port on + * exiting the SCI_BASE_STATE_STOPPED. This function enables the SCU hardware + * port task scheduler. none + */ +static void scic_sds_port_stopped_state_exit(void *object) +{ + struct scic_sds_port *sci_port = object; + + /* Enable and suspend the port task scheduler */ + scic_sds_port_enable_port_task_scheduler(sci_port); +} + +/** + * scic_sds_port_ready_state_enter - + * @object: This is the object which is cast to a struct scic_sds_port object. + * + * This method will perform the actions required by the struct scic_sds_port on + * entering the SCI_BASE_PORT_STATE_READY. This function sets the ready state + * handlers for the struct scic_sds_port object, reports the port object as + * not ready and starts the ready substate machine. none + */ +static void scic_sds_port_ready_state_enter(void *object) +{ + struct scic_sds_port *sci_port = object; + struct scic_sds_controller *scic = sci_port->owning_controller; + struct isci_host *ihost = scic_to_ihost(scic); + struct isci_port *iport = sci_port_to_iport(sci_port); + u32 prev_state; + + /* Put the ready state handlers in place though they will not be there long */ + scic_sds_port_set_base_state_handlers(sci_port, SCI_BASE_PORT_STATE_READY); + + prev_state = sci_port->state_machine.previous_state_id; + if (prev_state == SCI_BASE_PORT_STATE_RESETTING) + isci_port_hard_reset_complete(iport, SCI_SUCCESS); + else + isci_port_not_ready(ihost, iport); + + /* Post and suspend the dummy remote node context for this port. */ + scic_sds_port_post_dummy_remote_node(sci_port); + + /* Start the ready substate machine */ + sci_base_state_machine_start(&sci_port->ready_substate_machine); +} + +static void scic_sds_port_ready_state_exit(void *object) +{ + struct scic_sds_port *sci_port = object; + + sci_base_state_machine_stop(&sci_port->ready_substate_machine); + scic_sds_port_invalidate_dummy_remote_node(sci_port); +} + +/** + * + * @object: This is the object which is cast to a struct scic_sds_port object. + * + * This method will perform the actions required by the struct scic_sds_port on + * entering the SCI_BASE_PORT_STATE_RESETTING. This function sets the resetting + * state handlers for the struct scic_sds_port object. none + */ +static void scic_sds_port_resetting_state_enter(void *object) +{ + struct scic_sds_port *sci_port = object; + + scic_sds_port_set_base_state_handlers( + sci_port, SCI_BASE_PORT_STATE_RESETTING + ); +} + +/** + * + * @object: This is the object which is cast to a struct scic_sds_port object. + * + * This function will perform the actions required by the + * struct scic_sds_port on + * exiting the SCI_BASE_STATE_RESETTING. This function does nothing. none + */ +static inline void scic_sds_port_resetting_state_exit(void *object) +{ + struct scic_sds_port *sci_port = object; + + isci_timer_stop(sci_port->timer_handle); +} + +/** + * + * @object: This is the void object which is cast to a + * struct scic_sds_port object. + * + * This method will perform the actions required by the struct scic_sds_port on + * entering the SCI_BASE_PORT_STATE_STOPPING. This function sets the stopping + * state handlers for the struct scic_sds_port object. none + */ +static void scic_sds_port_stopping_state_enter(void *object) +{ + struct scic_sds_port *sci_port = object; + + scic_sds_port_set_base_state_handlers( + sci_port, SCI_BASE_PORT_STATE_STOPPING + ); +} + +/** + * + * @object: This is the object which is cast to a struct scic_sds_port object. + * + * This function will perform the actions required by the + * struct scic_sds_port on + * exiting the SCI_BASE_STATE_STOPPING. This function does nothing. none + */ +static inline void +scic_sds_port_stopping_state_exit(void *object) +{ + struct scic_sds_port *sci_port = object; + + isci_timer_stop(sci_port->timer_handle); + + scic_sds_port_destroy_dummy_resources(sci_port); +} + +/** + * + * @object: This is the object which is cast to a struct scic_sds_port object. + * + * This function will perform the actions required by the + * struct scic_sds_port on + * entering the SCI_BASE_PORT_STATE_STOPPING. This function sets the stopping + * state handlers for the struct scic_sds_port object. none + */ +static void scic_sds_port_failed_state_enter(void *object) +{ + struct scic_sds_port *sci_port = object; + struct isci_port *iport = sci_port_to_iport(sci_port); + + scic_sds_port_set_base_state_handlers(sci_port, + SCI_BASE_PORT_STATE_FAILED); + + isci_port_hard_reset_complete(iport, SCI_FAILURE_TIMEOUT); +} + +/* --------------------------------------------------------------------------- */ + +static const struct sci_base_state scic_sds_port_state_table[] = { + [SCI_BASE_PORT_STATE_STOPPED] = { + .enter_state = scic_sds_port_stopped_state_enter, + .exit_state = scic_sds_port_stopped_state_exit + }, + [SCI_BASE_PORT_STATE_STOPPING] = { + .enter_state = scic_sds_port_stopping_state_enter, + .exit_state = scic_sds_port_stopping_state_exit + }, + [SCI_BASE_PORT_STATE_READY] = { + .enter_state = scic_sds_port_ready_state_enter, + .exit_state = scic_sds_port_ready_state_exit + }, + [SCI_BASE_PORT_STATE_RESETTING] = { + .enter_state = scic_sds_port_resetting_state_enter, + .exit_state = scic_sds_port_resetting_state_exit + }, + [SCI_BASE_PORT_STATE_FAILED] = { + .enter_state = scic_sds_port_failed_state_enter, + } +}; + +void scic_sds_port_construct(struct scic_sds_port *sci_port, u8 index, + struct scic_sds_controller *scic) +{ + sci_base_state_machine_construct(&sci_port->state_machine, + sci_port, + scic_sds_port_state_table, + SCI_BASE_PORT_STATE_STOPPED); + + sci_base_state_machine_start(&sci_port->state_machine); + + sci_base_state_machine_construct(&sci_port->ready_substate_machine, + sci_port, + scic_sds_port_ready_substate_table, + SCIC_SDS_PORT_READY_SUBSTATE_WAITING); + + sci_port->logical_port_index = SCIC_SDS_DUMMY_PORT; + sci_port->physical_port_index = index; + sci_port->active_phy_mask = 0; + + sci_port->owning_controller = scic; + + sci_port->started_request_count = 0; + sci_port->assigned_device_count = 0; + + sci_port->reserved_rni = SCU_DUMMY_INDEX; + sci_port->reserved_tci = SCU_DUMMY_INDEX; + + sci_port->timer_handle = NULL; + sci_port->port_task_scheduler_registers = NULL; + + for (index = 0; index < SCI_MAX_PHYS; index++) + sci_port->phy_table[index] = NULL; +} + +void isci_port_init(struct isci_port *iport, struct isci_host *ihost, int index) +{ + INIT_LIST_HEAD(&iport->remote_dev_list); + INIT_LIST_HEAD(&iport->domain_dev_list); + spin_lock_init(&iport->state_lock); + init_completion(&iport->start_complete); + iport->isci_host = ihost; + isci_port_change_state(iport, isci_freed); +} + +/** + * isci_port_get_state() - This function gets the status of the port object. + * @isci_port: This parameter points to the isci_port object + * + * status of the object as a isci_status enum. + */ +enum isci_status isci_port_get_state( + struct isci_port *isci_port) +{ + return isci_port->status; +} + +static void isci_port_bc_change_received(struct isci_host *ihost, + struct scic_sds_port *sci_port, + struct scic_sds_phy *sci_phy) +{ + struct isci_phy *iphy = sci_phy_to_iphy(sci_phy); + + dev_dbg(&ihost->pdev->dev, "%s: iphy = %p, sas_phy = %p\n", + __func__, iphy, &iphy->sas_phy); + + ihost->sas_ha.notify_port_event(&iphy->sas_phy, PORTE_BROADCAST_RCVD); + scic_port_enable_broadcast_change_notification(sci_port); +} + +void scic_sds_port_broadcast_change_received( + struct scic_sds_port *sci_port, + struct scic_sds_phy *sci_phy) +{ + struct scic_sds_controller *scic = sci_port->owning_controller; + struct isci_host *ihost = scic_to_ihost(scic); + + /* notify the user. */ + isci_port_bc_change_received(ihost, sci_port, sci_phy); +} + int isci_port_perform_hard_reset(struct isci_host *ihost, struct isci_port *iport, struct isci_phy *iphy) { @@ -359,9 +2675,24 @@ int isci_port_perform_hard_reset(struct isci_host *ihost, struct isci_port *ipor return ret; } -void isci_port_stop_complete(struct scic_sds_controller *scic, - struct scic_sds_port *sci_port, - enum sci_status completion_status) +/** + * isci_port_deformed() - This function is called by libsas when a port becomes + * inactive. + * @phy: This parameter specifies the libsas phy with the inactive port. + * + */ +void isci_port_deformed(struct asd_sas_phy *phy) { - dev_dbg(&scic_to_ihost(scic)->pdev->dev, "Port stop complete\n"); + pr_debug("%s: sas_phy = %p\n", __func__, phy); +} + +/** + * isci_port_formed() - This function is called by libsas when a port becomes + * active. + * @phy: This parameter specifies the libsas phy with the active port. + * + */ +void isci_port_formed(struct asd_sas_phy *phy) +{ + pr_debug("%s: sas_phy = %p, sas_port = %p\n", __func__, phy, phy->port); } diff --git a/drivers/scsi/isci/port.h b/drivers/scsi/isci/port.h index 59505cbf2bb3..ea41dcead3ae 100644 --- a/drivers/scsi/isci/port.h +++ b/drivers/scsi/isci/port.h @@ -58,7 +58,10 @@ #include <scsi/libsas.h> #include "isci.h" -#include "scic_sds_port.h" +#include "sas.h" +#include "phy.h" + +#define SCIC_SDS_DUMMY_PORT 0xFF struct isci_phy; struct isci_host; @@ -73,6 +76,111 @@ enum isci_status { }; /** + * struct scic_sds_port + * + * The core port object provides the the abstraction for an SCU port. + */ +struct scic_sds_port { + + /** + * This field contains the information for the base port state machine. + */ + struct sci_base_state_machine state_machine; + + /** + * 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; + + u16 reserved_rni; + u16 reserved_tci; + + /** + * 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 port task scheduler registers + * for the SCU hardware. + */ + struct scu_port_task_scheduler_registers __iomem + *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. + */ + u32 __iomem *port_pe_configuration_register; + + /** + * This field is the VIIT register space for ths port object. + */ + struct scu_viit_entry __iomem *viit_registers; + +}; + + + +/** * struct isci_port - This class represents the port object used to internally * represent libsas port objects. It also keeps a list of remote device * objects. @@ -99,54 +207,301 @@ static inline struct isci_port *sci_port_to_iport(struct scic_sds_port *sci_port return iport; } -enum isci_status isci_port_get_state( - struct isci_port *isci_port); +enum scic_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 scic_port_end_point_properties { + struct sci_sas_address sas_address; + struct scic_phy_proto protocols; +}; + +struct scic_port_properties { + u32 index; + struct scic_port_end_point_properties local; + struct scic_port_end_point_properties remote; + u32 phy_mask; +}; + +/** + * 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 +}; + +/** + * enum scic_sds_port_states - This enumeration depicts all the states for the + * common port state machine. + * + * + */ +enum scic_sds_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_BASE_PORT_STATE_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_BASE_PORT_STATE_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_BASE_PORT_STATE_READY, + + /** + * 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_BASE_PORT_STATE_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_BASE_PORT_STATE_FAILED, + + SCI_BASE_PORT_MAX_STATES + +}; + +struct scic_sds_remote_device; +struct scic_sds_request; + +typedef enum sci_status (*scic_sds_port_handler_t)(struct scic_sds_port *); -void isci_port_formed( - struct asd_sas_phy *); +typedef enum sci_status (*scic_sds_port_phy_handler_t)(struct scic_sds_port *, + struct scic_sds_phy *); -void isci_port_deformed( - struct asd_sas_phy *); +typedef enum sci_status (*scic_sds_port_reset_handler_t)(struct scic_sds_port *, + u32 timeout); -void isci_port_bc_change_received( - struct isci_host *isci_host, - struct scic_sds_port *port, - struct scic_sds_phy *phy); +typedef enum sci_status (*scic_sds_port_event_handler_t)(struct scic_sds_port *, u32); -void isci_port_link_up( - struct isci_host *isci_host, - struct scic_sds_port *port, - struct scic_sds_phy *phy); +typedef enum sci_status (*scic_sds_port_frame_handler_t)(struct scic_sds_port *, u32); -void isci_port_link_down( - struct isci_host *isci_host, - struct isci_phy *isci_phy, - struct isci_port *port); +typedef void (*scic_sds_port_link_handler_t)(struct scic_sds_port *, struct scic_sds_phy *); -void isci_port_ready( - struct isci_host *isci_host, +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 { + /** + * The start_handler specifies the method invoked when a user + * attempts to start a port. + */ + scic_sds_port_handler_t start_handler; + + /** + * The stop_handler specifies the method invoked when a user + * attempts to stop a port. + */ + scic_sds_port_handler_t stop_handler; + + /** + * The destruct_handler specifies the method invoked when attempting to + * destruct a port. + */ + scic_sds_port_handler_t destruct_handler; + + /** + * The reset_handler specifies the method invoked when a user + * attempts to hard reset a port. + */ + scic_sds_port_reset_handler_t reset_handler; + + /** + * The add_phy_handler specifies the method invoked when a user + * attempts to add another phy into the port. + */ + scic_sds_port_phy_handler_t add_phy_handler; + + /** + * The remove_phy_handler specifies the method invoked when a user + * attempts to remove a phy from the port. + */ + scic_sds_port_phy_handler_t remove_phy_handler; + + 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; + +}; + +/** + * 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_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_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) + + +static inline void scic_sds_port_decrement_request_count(struct scic_sds_port *sci_port) +{ + if (WARN_ONCE(sci_port->started_request_count == 0, + "%s: tried to decrement started_request_count past 0!?", + __func__)) + /* pass */; + else + sci_port->started_request_count--; +} + +#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 *sci_port, + u8 port_index, + struct scic_sds_controller *scic); + +enum sci_status scic_sds_port_initialize( + struct scic_sds_port *sci_port, + void __iomem *port_task_scheduler_registers, + void __iomem *port_configuration_regsiter, + void __iomem *viit_registers); + +enum sci_status scic_sds_port_add_phy( + struct scic_sds_port *sci_port, + struct scic_sds_phy *sci_phy); + +enum sci_status scic_sds_port_remove_phy( + struct scic_sds_port *sci_port, + struct scic_sds_phy *sci_phy); + +void scic_sds_port_setup_transports( + struct scic_sds_port *sci_port, + u32 device_id); + + +void scic_sds_port_deactivate_phy( + struct scic_sds_port *sci_port, + struct scic_sds_phy *sci_phy, + bool do_notify_user); + +bool scic_sds_port_link_detected( + struct scic_sds_port *sci_port, + struct scic_sds_phy *sci_phy); + +void scic_sds_port_link_up( + struct scic_sds_port *sci_port, + struct scic_sds_phy *sci_phy); + +void scic_sds_port_link_down( + struct scic_sds_port *sci_port, + struct scic_sds_phy *sci_phy); + +enum sci_status scic_sds_port_start_io( + struct scic_sds_port *sci_port, + struct scic_sds_remote_device *sci_dev, + struct scic_sds_request *sci_req); + +enum sci_status scic_sds_port_complete_io( + struct scic_sds_port *sci_port, + struct scic_sds_remote_device *sci_dev, + struct scic_sds_request *sci_req); + +enum sas_linkrate scic_sds_port_get_max_allowed_speed( + struct scic_sds_port *sci_port); + +void scic_sds_port_broadcast_change_received( + struct scic_sds_port *sci_port, + struct scic_sds_phy *sci_phy); + +bool scic_sds_port_is_valid_phy_assignment( + struct scic_sds_port *sci_port, + u32 phy_index); + +void scic_sds_port_get_sas_address( + struct scic_sds_port *sci_port, + struct sci_sas_address *sas_address); + +void scic_sds_port_get_attached_sas_address( + struct scic_sds_port *sci_port, + struct sci_sas_address *sas_address); + +enum isci_status isci_port_get_state( struct isci_port *isci_port); -void isci_port_not_ready( - struct isci_host *isci_host, - struct isci_port *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); -void isci_port_hard_reset_complete( - struct isci_port *isci_port, - enum sci_status completion_status); - int isci_port_perform_hard_reset(struct isci_host *ihost, struct isci_port *iport, struct isci_phy *iphy); - -void isci_port_stop_complete( - struct scic_sds_controller *scic, - struct scic_sds_port *sci_port, - enum sci_status completion_status); - #endif /* !defined(_ISCI_PORT_H_) */ - diff --git a/drivers/scsi/isci/core/scic_sds_port_configuration_agent.c b/drivers/scsi/isci/port_config.c index a5871fddc09a..028ffa370c90 100644 --- a/drivers/scsi/isci/core/scic_sds_port_configuration_agent.c +++ b/drivers/scsi/isci/port_config.c @@ -54,7 +54,6 @@ */ #include "host.h" -#include "scic_sds_port_configuration_agent.h" #include "timers.h" #define SCIC_SDS_MPC_RECONFIGURATION_TIMEOUT (10) diff --git a/drivers/scsi/isci/probe_roms.h b/drivers/scsi/isci/probe_roms.h index f4ef19ac281c..7e3e6d7a0a47 100644 --- a/drivers/scsi/isci/probe_roms.h +++ b/drivers/scsi/isci/probe_roms.h @@ -60,15 +60,117 @@ #include <linux/pci.h> #include "isci.h" -struct isci_orom *isci_request_oprom(struct pci_dev *pdev); +#define SCIC_SDS_PARM_NO_SPEED 0 + +/* generation 1 (i.e. 1.5 Gb/s) */ +#define SCIC_SDS_PARM_GEN1_SPEED 1 + +/* generation 2 (i.e. 3.0 Gb/s) */ +#define SCIC_SDS_PARM_GEN2_SPEED 2 + +/* generation 3 (i.e. 6.0 Gb/s) */ +#define SCIC_SDS_PARM_GEN3_SPEED 3 +#define SCIC_SDS_PARM_MAX_SPEED SCIC_SDS_PARM_GEN3_SPEED + +/* parameters that can be set by module parameters */ +struct scic_sds_user_parameters { + struct sci_phy_user_params { + /** + * This field specifies the NOTIFY (ENABLE SPIN UP) primitive + * insertion frequency for this phy index. + */ + u32 notify_enable_spin_up_insertion_frequency; + + /** + * This method specifies the number of transmitted DWORDs within which + * to transmit a single ALIGN primitive. This value applies regardless + * of what type of device is attached or connection state. A value of + * 0 indicates that no ALIGN primitives will be inserted. + */ + u16 align_insertion_frequency; + + /** + * This method specifies the number of transmitted DWORDs within which + * to transmit 2 ALIGN primitives. This applies for SAS connections + * only. A minimum value of 3 is required for this field. + */ + u16 in_connection_align_insertion_frequency; + + /** + * This field indicates the maximum speed generation to be utilized + * by phys in the supplied port. + * - A value of 1 indicates generation 1 (i.e. 1.5 Gb/s). + * - A value of 2 indicates generation 2 (i.e. 3.0 Gb/s). + * - A value of 3 indicates generation 3 (i.e. 6.0 Gb/s). + */ + u8 max_speed_generation; + + } phys[SCI_MAX_PHYS]; + + /** + * This field specifies the maximum number of direct attached devices + * that can have power supplied to them simultaneously. + */ + u8 max_number_concurrent_device_spin_up; + + /** + * This field specifies the number of seconds to allow a phy to consume + * power before yielding to another phy. + * + */ + u8 phy_spin_up_delay_interval; + + /** + * These timer values specifies how long a link will remain open with no + * activity in increments of a microsecond, it can be in increments of + * 100 microseconds if the upper most bit is set. + * + */ + u16 stp_inactivity_timeout; + u16 ssp_inactivity_timeout; + + /** + * These timer values specifies how long a link will remain open in increments + * of 100 microseconds. + * + */ + u16 stp_max_occupancy_timeout; + u16 ssp_max_occupancy_timeout; + + /** + * This timer value specifies how long a link will remain open with no + * outbound traffic in increments of a microsecond. + * + */ + u8 no_outbound_task_timeout; + +}; + +/* XXX kill this union */ +union scic_user_parameters { + /** + * This field specifies the user parameters specific to the + * Storage Controller Unit (SCU) Driver Standard (SDS) version + * 1. + */ + struct scic_sds_user_parameters sds1; +}; + +#define SCIC_SDS_PARM_PHY_MASK_MIN 0x0 +#define SCIC_SDS_PARM_PHY_MASK_MAX 0xF +#define MAX_CONCURRENT_DEVICE_SPIN_UP_COUNT 4 + +struct scic_sds_oem_params; +int scic_oem_parameters_validate(struct scic_sds_oem_params *oem); union scic_oem_parameters; -struct isci_orom; +void scic_oem_parameters_get(struct scic_sds_controller *scic, + union scic_oem_parameters *oem); -enum sci_status isci_parse_oem_parameters( - union scic_oem_parameters *oem_params, - struct isci_orom *orom, - int scu_index); +struct isci_orom; +struct isci_orom *isci_request_oprom(struct pci_dev *pdev); +enum sci_status isci_parse_oem_parameters(union scic_oem_parameters *oem, + struct isci_orom *orom, int scu_index); struct isci_orom *isci_request_firmware(struct pci_dev *pdev, const struct firmware *fw); struct isci_orom *isci_get_efi_var(struct pci_dev *pdev); @@ -153,6 +255,16 @@ struct scic_sds_oem_params { } phys[SCI_MAX_PHYS]; } __attribute__ ((packed)); +/* XXX kill this union */ +union scic_oem_parameters { + /** + * This field specifies the OEM parameters specific to the + * Storage Controller Unit (SCU) Driver Standard (SDS) version + * 1. + */ + struct scic_sds_oem_params sds1; +}; + struct isci_orom { struct sci_bios_oem_param_block_hdr hdr; struct scic_sds_oem_params ctrl[SCI_MAX_CONTROLLERS]; diff --git a/drivers/scsi/isci/remote_device.c b/drivers/scsi/isci/remote_device.c index 2baa215cb275..0bb639dfbada 100644 --- a/drivers/scsi/isci/remote_device.c +++ b/drivers/scsi/isci/remote_device.c @@ -57,8 +57,6 @@ #include "port.h" #include "remote_device.h" #include "request.h" -#include "scic_port.h" -#include "scic_sds_port.h" #include "remote_node_context.h" #include "scu_event_codes.h" #include "task.h" diff --git a/drivers/scsi/isci/remote_node_context.c b/drivers/scsi/isci/remote_node_context.c index 35231e7407b1..aef258b959f8 100644 --- a/drivers/scsi/isci/remote_node_context.c +++ b/drivers/scsi/isci/remote_node_context.c @@ -55,7 +55,6 @@ #include "host.h" #include "state_machine.h" -#include "scic_sds_port.h" #include "remote_device.h" #include "remote_node_context.h" #include "scu_event_codes.h" diff --git a/drivers/scsi/isci/request.c b/drivers/scsi/isci/request.c index 857ad067f11c..48e2dac72528 100644 --- a/drivers/scsi/isci/request.c +++ b/drivers/scsi/isci/request.c @@ -54,7 +54,6 @@ */ #include "isci.h" -#include "scic_port.h" #include "task.h" #include "request.h" #include "sata.h" |