/* * 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 "isci.h" #include "port.h" #include "request.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) { unsigned long flags; dev_dbg(&iport->isci_host->pdev->dev, "%s: iport = %p, state = 0x%x\n", __func__, iport, status); /* XXX pointless lock */ spin_lock_irqsave(&iport->state_lock, flags); iport->status = status; spin_unlock_irqrestore(&iport->state_lock, flags); } /* * 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 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; } /** * 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) { 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; } static void scic_port_bcn_enable(struct scic_sds_port *sci_port) { struct scic_sds_phy *sci_phy; u32 val; int i; for (i = 0; i < ARRAY_SIZE(sci_port->phy_table); i++) { sci_phy = sci_port->phy_table[i]; if (!sci_phy) continue; val = readl(&sci_phy->link_layer_registers->link_layer_control); /* clear the bit by writing 1. */ writel(val, &sci_phy->link_layer_registers->link_layer_control); } } /* called under scic_lock to stabilize phy:port associations */ void isci_port_bcn_enable(struct isci_host *ihost, struct isci_port *iport) { int i; clear_bit(IPORT_BCN_BLOCKED, &iport->flags); wake_up(&ihost->eventq); if (!test_and_clear_bit(IPORT_BCN_PENDING, &iport->flags)) return; for (i = 0; i < ARRAY_SIZE(iport->sci.phy_table); i++) { struct scic_sds_phy *sci_phy = iport->sci.phy_table[i]; struct isci_phy *iphy = sci_phy_to_iphy(sci_phy); if (!sci_phy) continue; ihost->sas_ha.notify_port_event(&iphy->sas_phy, PORTE_BROADCAST_RCVD); break; } } 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); struct isci_port *iport = iphy->isci_port; if (iport && test_bit(IPORT_BCN_BLOCKED, &iport->flags)) { dev_dbg(&ihost->pdev->dev, "%s: disabled BCN; isci_phy = %p, sas_phy = %p\n", __func__, iphy, &iphy->sas_phy); set_bit(IPORT_BCN_PENDING, &iport->flags); atomic_inc(&iport->event); wake_up(&ihost->eventq); } else { dev_dbg(&ihost->pdev->dev, "%s: isci_phy = %p, sas_phy = %p\n", __func__, iphy, &iphy->sas_phy); ihost->sas_ha.notify_port_event(&iphy->sas_phy, PORTE_BROADCAST_RCVD); } scic_port_bcn_enable(sci_port); } 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; struct isci_phy *isci_phy = sci_phy_to_iphy(phy); struct isci_port *isci_port = sci_port_to_iport(port); unsigned long success = true; BUG_ON(isci_phy->isci_port != NULL); isci_phy->isci_port = isci_port; dev_dbg(&isci_host->pdev->dev, "%s: isci_port = %p\n", __func__, isci_port); spin_lock_irqsave(&isci_phy->sas_phy.frame_rcvd_lock, flags); isci_port_change_state(isci_phy->isci_port, isci_starting); scic_port_get_properties(port, &properties); if (phy->protocol == SCIC_SDS_PHY_PROTOCOL_SATA) { u64 attached_sas_address; isci_phy->sas_phy.oob_mode = SATA_OOB_MODE; isci_phy->sas_phy.frame_rcvd_size = sizeof(struct dev_to_host_fis); /* * For direct-attached SATA devices, the SCI core will * automagically assign a SAS address to the end device * for the purpose of creating a port. This SAS address * will not be the same as assigned to the PHY and needs * to be obtained from struct scic_port_properties properties. */ attached_sas_address = properties.remote.sas_address.high; attached_sas_address <<= 32; attached_sas_address |= properties.remote.sas_address.low; swab64s(&attached_sas_address); memcpy(&isci_phy->sas_phy.attached_sas_addr, &attached_sas_address, sizeof(attached_sas_address)); } else if (phy->protocol == SCIC_SDS_PHY_PROTOCOL_SAS) { isci_phy->sas_phy.oob_mode = SAS_OOB_MODE; isci_phy->sas_phy.frame_rcvd_size = sizeof(struct sas_identify_frame); /* Copy the attached SAS address from the IAF */ memcpy(isci_phy->sas_phy.attached_sas_addr, isci_phy->frame_rcvd.iaf.sas_addr, SAS_ADDR_SIZE); } else { dev_err(&isci_host->pdev->dev, "%s: unkown target\n", __func__); success = false; } isci_phy->sas_phy.phy->negotiated_linkrate = sci_phy_linkrate(phy); spin_unlock_irqrestore(&isci_phy->sas_phy.frame_rcvd_lock, flags); /* Notify libsas that we have an address frame, if indeed * we've found an SSP, SMP, or STP target */ if (success) isci_host->sas_ha.notify_port_event(&isci_phy->sas_phy, PORTE_BYTES_DMAED); } /** * isci_port_link_down() - This function is called by the sci core when a link * becomes inactive. * @isci_host: This parameter specifies the isci host object. * @phy: This parameter specifies the isci phy with the active link. * @port: This parameter specifies the isci port with the active link. * */ 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; dev_dbg(&isci_host->pdev->dev, "%s: isci_port = %p\n", __func__, isci_port); if (isci_port) { /* check to see if this is the last phy on this port. */ if (isci_phy->sas_phy.port && isci_phy->sas_phy.port->num_phys == 1) { atomic_inc(&isci_port->event); isci_port_bcn_enable(isci_host, isci_port); /* change the state for all devices on this port. The * next task sent to this device will be returned as * SAS_TASK_UNDELIVERED, and the scsi mid layer will * remove the target */ list_for_each_entry(isci_device, &isci_port->remote_dev_list, node) { dev_dbg(&isci_host->pdev->dev, "%s: isci_device = %p\n", __func__, isci_device); set_bit(IDEV_GONE, &isci_device->flags); } } isci_port_change_state(isci_port, isci_stopping); } /* Notify libsas of the borken link, this will trigger calls to our * isci_port_deformed and isci_dev_gone functions. */ sas_phy_disconnected(&isci_phy->sas_phy); isci_host->sas_ha.notify_phy_event(&isci_phy->sas_phy, PHYE_LOSS_OF_SIGNAL); isci_phy->isci_port = NULL; dev_dbg(&isci_host->pdev->dev, "%s: isci_port = %p - Done\n", __func__, isci_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. * */ 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); complete_all(&isci_port->start_complete); isci_port_change_state(isci_port, isci_ready); return; } /** * isci_port_not_ready() - This function is called by the sci core when a link * is not ready. All remote devices on this link will be removed if they are * in the stopping state. * @isci_host: This parameter specifies the isci host object. * @port: This parameter specifies the sci port with the active link. * */ 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. * @port: This parameter specifies the sci port with the active link. * @completion_status: This parameter specifies the core status for the reset * process. * */ 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", __func__, isci_port, completion_status); /* Save the status of the hard reset from the port. */ isci_port->hard_reset_status = completion_status; 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) && (phy_get_non_dummy_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 && phy_get_non_dummy_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; } /** * 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; } /* * 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 tag) { struct scu_task_context *task_context; task_context = scic_sds_controller_get_task_context_buffer(sci_port->owning_controller, tag); 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 = ISCI_TAG_TCI(tag); 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; } /** * 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"); } } static bool is_port_ready_state(enum scic_sds_port_states state) { switch (state) { case SCI_PORT_READY: case SCI_PORT_SUB_WAITING: case SCI_PORT_SUB_OPERATIONAL: case SCI_PORT_SUB_CONFIGURING: return true; default: return false; } } /* flag dummy rnc hanling when exiting a ready state */ static void port_state_machine_change(struct scic_sds_port *sci_port, enum scic_sds_port_states state) { struct sci_base_state_machine *sm = &sci_port->sm; enum scic_sds_port_states old_state = sm->current_state_id; if (is_port_ready_state(old_state) && !is_port_ready_state(state)) sci_port->ready_exit = true; sci_change_state(sm, state); sci_port->ready_exit = false; } /** * 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->sm; scic_sds_port_activate_phy(sci_port, sci_phy, do_notify_user); if (sm->current_state_id == SCI_PORT_RESETTING) port_state_machine_change(sci_port, SCI_PORT_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; } static void port_timeout(unsigned long data) { struct sci_timer *tmr = (struct sci_timer *)data; struct scic_sds_port *sci_port = container_of(tmr, typeof(*sci_port), timer); struct isci_host *ihost = scic_to_ihost(sci_port->owning_controller); unsigned long flags; u32 current_state; spin_lock_irqsave(&ihost->scic_lock, flags); if (tmr->cancel) goto done; current_state = sci_port->sm.current_state_id; if (current_state == SCI_PORT_RESETTING) { /* if the port is still in the resetting state then the timeout * fired before the reset completed. */ port_state_machine_change(sci_port, SCI_PORT_FAILED); } else if (current_state == SCI_PORT_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_PORT_STOPPING) { /* if the port is still stopping then the stop has not completed */ isci_port_stop_complete(sci_port->owning_controller, 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); } done: spin_unlock_irqrestore(&ihost->scic_lock, flags); } /* --------------------------------------------------------------------------- */ /** * 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; } /** * * @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); } static void scic_sds_port_ready_substate_waiting_enter(struct sci_base_state_machine *sm) { struct scic_sds_port *sci_port = container_of(sm, typeof(*sci_port), sm); 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 */ port_state_machine_change(sci_port, SCI_PORT_SUB_OPERATIONAL); } } static void scic_sds_port_ready_substate_operational_enter(struct sci_base_state_machine *sm) { u32 index; struct scic_sds_port *sci_port = container_of(sm, typeof(*sci_port), sm); 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); 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); } 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); } /** * * @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_PORT_SUB_OPERATIONAL. This function reports * the port not ready and suspends the port task scheduler. none */ static void scic_sds_port_ready_substate_operational_exit(struct sci_base_state_machine *sm) { struct scic_sds_port *sci_port = container_of(sm, typeof(*sci_port), sm); 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); if (sci_port->ready_exit) scic_sds_port_invalidate_dummy_remote_node(sci_port); } static void scic_sds_port_ready_substate_configuring_enter(struct sci_base_state_machine *sm) { struct scic_sds_port *sci_port = container_of(sm, typeof(*sci_port), sm); 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); if (sci_port->active_phy_mask == 0) { isci_port_not_ready(ihost, iport); port_state_machine_change(sci_port, SCI_PORT_SUB_WAITING); } else if (sci_port->started_request_count == 0) port_state_machine_change(sci_port, SCI_PORT_SUB_OPERATIONAL); } static void scic_sds_port_ready_substate_configuring_exit(struct sci_base_state_machine *sm) { struct scic_sds_port *sci_port = container_of(sm, typeof(*sci_port), sm); scic_sds_port_suspend_port_task_scheduler(sci_port); if (sci_port->ready_exit) scic_sds_port_invalidate_dummy_remote_node(sci_port); } enum sci_status scic_sds_port_start(struct scic_sds_port *sci_port) { struct scic_sds_controller *scic = sci_port->owning_controller; enum sci_status status = SCI_SUCCESS; enum scic_sds_port_states state; u32 phy_mask; state = sci_port->sm.current_state_id; if (state != SCI_PORT_STOPPED) { dev_warn(sciport_to_dev(sci_port), "%s: in wrong state: %d\n", __func__, state); return SCI_FAILURE_INVALID_STATE; } 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; } 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) { port_state_machine_change(sci_port, SCI_PORT_READY); return SCI_SUCCESS; } status = SCI_FAILURE; } if (status != SCI_SUCCESS) scic_sds_port_destroy_dummy_resources(sci_port); return status; } enum sci_status scic_sds_port_stop(struct scic_sds_port *sci_port) { enum scic_sds_port_states state; state = sci_port->sm.current_state_id; switch (state) { case SCI_PORT_STOPPED: return SCI_SUCCESS; case SCI_PORT_SUB_WAITING: case SCI_PORT_SUB_OPERATIONAL: case SCI_PORT_SUB_CONFIGURING: case SCI_PORT_RESETTING: port_state_machine_change(sci_port, SCI_PORT_STOPPING); return SCI_SUCCESS; default: dev_warn(sciport_to_dev(sci_port), "%s: in wrong state: %d\n", __func__, state); return SCI_FAILURE_INVALID_STATE; } } static enum sci_status scic_port_hard_reset(struct scic_sds_port *sci_port, u32 timeout) { enum sci_status status = SCI_FAILURE_INVALID_PHY; struct scic_sds_phy *selected_phy = NULL; enum scic_sds_port_states state; u32 phy_index; state = sci_port->sm.current_state_id; if (state != SCI_PORT_SUB_OPERATIONAL) { dev_warn(sciport_to_dev(sci_port), "%s: in wrong state: %d\n", __func__, state); return SCI_FAILURE_INVALID_STATE; } /* Select a phy on which we can send the hard reset request. */ for (phy_index = 0; phy_index < SCI_MAX_PHYS && !selected_phy; phy_index++) { selected_phy = sci_port->phy_table[phy_index]; if (selected_phy && !scic_sds_port_active_phy(sci_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) return status; status = scic_sds_phy_reset(selected_phy); if (status != SCI_SUCCESS) return status; sci_mod_timer(&sci_port->timer, timeout); sci_port->not_ready_reason = SCIC_PORT_NOT_READY_HARD_RESET_REQUESTED; port_state_machine_change(sci_port, SCI_PORT_RESETTING); return SCI_SUCCESS; } /** * 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 a failure 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) { enum sci_status status; enum scic_sds_port_states state; state = sci_port->sm.current_state_id; switch (state) { case SCI_PORT_STOPPED: { struct sci_sas_address port_sas_address; /* Read the port assigned SAS Address if there is one */ scic_sds_port_get_sas_address(sci_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(sci_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(sci_port, sci_phy); } case SCI_PORT_SUB_WAITING: case SCI_PORT_SUB_OPERATIONAL: status = scic_sds_port_set_phy(sci_port, sci_phy); if (status != SCI_SUCCESS) return status; scic_sds_port_general_link_up_handler(sci_port, sci_phy, true); sci_port->not_ready_reason = SCIC_PORT_NOT_READY_RECONFIGURING; port_state_machine_change(sci_port, SCI_PORT_SUB_CONFIGURING); return status; case SCI_PORT_SUB_CONFIGURING: status = scic_sds_port_set_phy(sci_port, sci_phy); if (status != SCI_SUCCESS) return status; scic_sds_port_general_link_up_handler(sci_port, sci_phy, true); /* Re-enter the configuring state since this may be the last phy in * the port. */ port_state_machine_change(sci_port, SCI_PORT_SUB_CONFIGURING); return SCI_SUCCESS; default: dev_warn(sciport_to_dev(sci_port), "%s: in wrong state: %d\n", __func__, state); return SCI_FAILURE_INVALID_STATE; } } /** * 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 a failure 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) { enum sci_status status; enum scic_sds_port_states state; state = sci_port->sm.current_state_id; switch (state) { case SCI_PORT_STOPPED: return scic_sds_port_clear_phy(sci_port, sci_phy); case SCI_PORT_SUB_OPERATIONAL: status = scic_sds_port_clear_phy(sci_port, sci_phy); if (status != SCI_SUCCESS) return status; scic_sds_port_deactivate_phy(sci_port, sci_phy, true); sci_port->not_ready_reason = SCIC_PORT_NOT_READY_RECONFIGURING; port_state_machine_change(sci_port, SCI_PORT_SUB_CONFIGURING); return SCI_SUCCESS; case SCI_PORT_SUB_CONFIGURING: status = scic_sds_port_clear_phy(sci_port, sci_phy); if (status != SCI_SUCCESS) return status; scic_sds_port_deactivate_phy(sci_port, sci_phy, true); /* Re-enter the configuring state since this may be the last phy in * the port */ port_state_machine_change(sci_port, SCI_PORT_SUB_CONFIGURING); return SCI_SUCCESS; default: dev_warn(sciport_to_dev(sci_port), "%s: in wrong state: %d\n", __func__, state); return SCI_FAILURE_INVALID_STATE; } } enum sci_status scic_sds_port_link_up(struct scic_sds_port *sci_port, struct scic_sds_phy *sci_phy) { enum scic_sds_port_states state; state = sci_port->sm.current_state_id; switch (state) { case SCI_PORT_SUB_WAITING: /* 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); port_state_machine_change(sci_port, SCI_PORT_SUB_OPERATIONAL); return SCI_SUCCESS; case SCI_PORT_SUB_OPERATIONAL: scic_sds_port_general_link_up_handler(sci_port, sci_phy, true); return SCI_SUCCESS; case SCI_PORT_RESETTING: /* 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(sci_port, sci_phy, false); return SCI_SUCCESS; default: dev_warn(sciport_to_dev(sci_port), "%s: in wrong state: %d\n", __func__, state); return SCI_FAILURE_INVALID_STATE; } } enum sci_status scic_sds_port_link_down(struct scic_sds_port *sci_port, struct scic_sds_phy *sci_phy) { enum scic_sds_port_states state; state = sci_port->sm.current_state_id; switch (state) { case SCI_PORT_SUB_OPERATIONAL: 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) port_state_machine_change(sci_port, SCI_PORT_SUB_WAITING); return SCI_SUCCESS; case SCI_PORT_RESETTING: /* In the resetting state we don't notify the user regarding * link up and link down notifications. */ scic_sds_port_deactivate_phy(sci_port, sci_phy, false); return SCI_SUCCESS; default: dev_warn(sciport_to_dev(sci_port), "%s: in wrong state: %d\n", __func__, state); return SCI_FAILURE_INVALID_STATE; } } 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 scic_sds_port_states state; state = sci_port->sm.current_state_id; switch (state) { case SCI_PORT_SUB_WAITING: return SCI_FAILURE_INVALID_STATE; case SCI_PORT_SUB_OPERATIONAL: sci_port->started_request_count++; return SCI_SUCCESS; default: dev_warn(sciport_to_dev(sci_port), "%s: in wrong state: %d\n", __func__, state); return SCI_FAILURE_INVALID_STATE; } } 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 scic_sds_port_states state; state = sci_port->sm.current_state_id; switch (state) { case SCI_PORT_STOPPED: dev_warn(sciport_to_dev(sci_port), "%s: in wrong state: %d\n", __func__, state); return SCI_FAILURE_INVALID_STATE; case SCI_PORT_STOPPING: scic_sds_port_decrement_request_count(sci_port); if (sci_port->started_request_count == 0) port_state_machine_change(sci_port, SCI_PORT_STOPPED); break; case SCI_PORT_READY: case SCI_PORT_RESETTING: case SCI_PORT_FAILED: case SCI_PORT_SUB_WAITING: case SCI_PORT_SUB_OPERATIONAL: scic_sds_port_decrement_request_count(sci_port); break; case SCI_PORT_SUB_CONFIGURING: scic_sds_port_decrement_request_count(sci_port); if (sci_port->started_request_count == 0) { port_state_machine_change(sci_port, SCI_PORT_SUB_OPERATIONAL); } break; } return SCI_SUCCESS; } /** * * @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_stopped_state_enter(struct sci_base_state_machine *sm) { struct scic_sds_port *sci_port = container_of(sm, typeof(*sci_port), sm); if (sci_port->sm.previous_state_id == SCI_PORT_STOPPING) { /* * 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); } } static void scic_sds_port_stopped_state_exit(struct sci_base_state_machine *sm) { struct scic_sds_port *sci_port = container_of(sm, typeof(*sci_port), sm); /* Enable and suspend the port task scheduler */ scic_sds_port_enable_port_task_scheduler(sci_port); } static void scic_sds_port_ready_state_enter(struct sci_base_state_machine *sm) { struct scic_sds_port *sci_port = container_of(sm, typeof(*sci_port), sm); 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; prev_state = sci_port->sm.previous_state_id; if (prev_state == SCI_PORT_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 */ port_state_machine_change(sci_port, SCI_PORT_SUB_WAITING); } static void scic_sds_port_resetting_state_exit(struct sci_base_state_machine *sm) { struct scic_sds_port *sci_port = container_of(sm, typeof(*sci_port), sm); sci_del_timer(&sci_port->timer); } static void scic_sds_port_stopping_state_exit(struct sci_base_state_machine *sm) { struct scic_sds_port *sci_port = container_of(sm, typeof(*sci_port), sm); sci_del_timer(&sci_port->timer); scic_sds_port_destroy_dummy_resources(sci_port); } static void scic_sds_port_failed_state_enter(struct sci_base_state_machine *sm) { struct scic_sds_port *sci_port = container_of(sm, typeof(*sci_port), sm); struct isci_port *iport = sci_port_to_iport(sci_port); isci_port_hard_reset_complete(iport, SCI_FAILURE_TIMEOUT); } /* --------------------------------------------------------------------------- */ static const struct sci_base_state scic_sds_port_state_table[] = { [SCI_PORT_STOPPED] = { .enter_state = scic_sds_port_stopped_state_enter, .exit_state = scic_sds_port_stopped_state_exit }, [SCI_PORT_STOPPING] = { .exit_state = scic_sds_port_stopping_state_exit }, [SCI_PORT_READY] = { .enter_state = scic_sds_port_ready_state_enter, }, [SCI_PORT_SUB_WAITING] = { .enter_state = scic_sds_port_ready_substate_waiting_enter, }, [SCI_PORT_SUB_OPERATIONAL] = { .enter_state = scic_sds_port_ready_substate_operational_enter, .exit_state = scic_sds_port_ready_substate_operational_exit }, [SCI_PORT_SUB_CONFIGURING] = { .enter_state = scic_sds_port_ready_substate_configuring_enter, .exit_state = scic_sds_port_ready_substate_configuring_exit }, [SCI_PORT_RESETTING] = { .exit_state = scic_sds_port_resetting_state_exit }, [SCI_PORT_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_init_sm(&sci_port->sm, scic_sds_port_state_table, SCI_PORT_STOPPED); sci_port->logical_port_index = SCIC_SDS_DUMMY_PORT; sci_port->physical_port_index = index; sci_port->active_phy_mask = 0; sci_port->ready_exit = false; 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_init_timer(&sci_port->timer, port_timeout); 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); atomic_set(&iport->event, 0); } /** * 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; } 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) { unsigned long flags; enum sci_status status; int idx, ret = TMF_RESP_FUNC_COMPLETE; dev_dbg(&ihost->pdev->dev, "%s: iport = %p\n", __func__, iport); init_completion(&iport->hard_reset_complete); spin_lock_irqsave(&ihost->scic_lock, flags); #define ISCI_PORT_RESET_TIMEOUT SCIC_SDS_SIGNATURE_FIS_TIMEOUT status = scic_port_hard_reset(&iport->sci, ISCI_PORT_RESET_TIMEOUT); spin_unlock_irqrestore(&ihost->scic_lock, flags); if (status == SCI_SUCCESS) { wait_for_completion(&iport->hard_reset_complete); dev_dbg(&ihost->pdev->dev, "%s: iport = %p; hard reset completion\n", __func__, iport); if (iport->hard_reset_status != SCI_SUCCESS) ret = TMF_RESP_FUNC_FAILED; } else { ret = TMF_RESP_FUNC_FAILED; dev_err(&ihost->pdev->dev, "%s: iport = %p; scic_port_hard_reset call" " failed 0x%x\n", __func__, iport, status); } /* If the hard reset for the port has failed, consider this * the same as link failures on all phys in the port. */ if (ret != TMF_RESP_FUNC_COMPLETE) { dev_err(&ihost->pdev->dev, "%s: iport = %p; hard reset failed " "(0x%x) - driving explicit link fail for all phys\n", __func__, iport, iport->hard_reset_status); /* Down all phys in the port. */ spin_lock_irqsave(&ihost->scic_lock, flags); for (idx = 0; idx < SCI_MAX_PHYS; ++idx) { if (iport->sci.phy_table[idx] != NULL) { scic_sds_phy_stop( iport->sci.phy_table[idx]); scic_sds_phy_start( iport->sci.phy_table[idx]); } } spin_unlock_irqrestore(&ihost->scic_lock, flags); } return ret; } /** * 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); }