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d76f71d988
remove the handler from the port state handler table and implement the logic directly in scic_sds_port_start(). Signed-off-by: Piotr Sawicki <piotr.sawicki@intel.com> [remove a level of indirection] Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2627 lines
84 KiB
C
2627 lines
84 KiB
C
/*
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* This file is provided under a dual BSD/GPLv2 license. When using or
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* redistributing this file, you may do so under either license.
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*
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* GPL LICENSE SUMMARY
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*
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* Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
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* The full GNU General Public License is included in this distribution
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* in the file called LICENSE.GPL.
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*
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* BSD LICENSE
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*
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* Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "isci.h"
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#include "port.h"
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#include "request.h"
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#include "timers.h"
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#define SCIC_SDS_PORT_HARD_RESET_TIMEOUT (1000)
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#define SCU_DUMMY_INDEX (0xFFFF)
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static struct scic_sds_port_state_handler scic_sds_port_state_handler_table[];
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static void isci_port_change_state(struct isci_port *iport, enum isci_status status)
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{
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unsigned long flags;
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dev_dbg(&iport->isci_host->pdev->dev,
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"%s: iport = %p, state = 0x%x\n",
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__func__, iport, status);
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/* XXX pointless lock */
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spin_lock_irqsave(&iport->state_lock, flags);
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iport->status = status;
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spin_unlock_irqrestore(&iport->state_lock, flags);
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}
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/*
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* This function will indicate which protocols are supported by this port.
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* @sci_port: a handle corresponding to the SAS port for which to return the
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* supported protocols.
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* @protocols: This parameter specifies a pointer to a data structure
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* which the core will copy the protocol values for the port from the
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* transmit_identification register.
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*/
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static void
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scic_sds_port_get_protocols(struct scic_sds_port *sci_port,
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struct scic_phy_proto *protocols)
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{
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u8 index;
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protocols->all = 0;
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for (index = 0; index < SCI_MAX_PHYS; index++) {
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if (sci_port->phy_table[index] != NULL) {
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scic_sds_phy_get_protocols(sci_port->phy_table[index],
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protocols);
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}
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}
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}
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/**
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* This method requests a list (mask) of the phys contained in the supplied SAS
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* port.
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* @sci_port: a handle corresponding to the SAS port for which to return the
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* phy mask.
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*
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* Return a bit mask indicating which phys are a part of this port. Each bit
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* corresponds to a phy identifier (e.g. bit 0 = phy id 0).
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*/
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static u32 scic_sds_port_get_phys(struct scic_sds_port *sci_port)
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{
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u32 index;
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u32 mask;
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mask = 0;
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for (index = 0; index < SCI_MAX_PHYS; index++) {
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if (sci_port->phy_table[index] != NULL) {
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mask |= (1 << index);
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}
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}
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return mask;
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}
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/**
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* scic_port_get_properties() - This method simply returns the properties
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* regarding the port, such as: physical index, protocols, sas address, etc.
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* @port: this parameter specifies the port for which to retrieve the physical
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* index.
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* @properties: This parameter specifies the properties structure into which to
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* copy the requested information.
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*
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* Indicate if the user specified a valid port. SCI_SUCCESS This value is
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* returned if the specified port was valid. SCI_FAILURE_INVALID_PORT This
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* value is returned if the specified port is not valid. When this value is
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* returned, no data is copied to the properties output parameter.
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*/
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static enum sci_status scic_port_get_properties(struct scic_sds_port *port,
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struct scic_port_properties *prop)
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{
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if ((port == NULL) ||
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(port->logical_port_index == SCIC_SDS_DUMMY_PORT))
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return SCI_FAILURE_INVALID_PORT;
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prop->index = port->logical_port_index;
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prop->phy_mask = scic_sds_port_get_phys(port);
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scic_sds_port_get_sas_address(port, &prop->local.sas_address);
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scic_sds_port_get_protocols(port, &prop->local.protocols);
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scic_sds_port_get_attached_sas_address(port, &prop->remote.sas_address);
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return SCI_SUCCESS;
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}
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static void isci_port_link_up(struct isci_host *isci_host,
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struct scic_sds_port *port,
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struct scic_sds_phy *phy)
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{
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unsigned long flags;
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struct scic_port_properties properties;
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struct isci_phy *isci_phy = sci_phy_to_iphy(phy);
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struct isci_port *isci_port = sci_port_to_iport(port);
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unsigned long success = true;
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BUG_ON(isci_phy->isci_port != NULL);
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isci_phy->isci_port = isci_port;
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dev_dbg(&isci_host->pdev->dev,
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"%s: isci_port = %p\n",
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__func__, isci_port);
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spin_lock_irqsave(&isci_phy->sas_phy.frame_rcvd_lock, flags);
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isci_port_change_state(isci_phy->isci_port, isci_starting);
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scic_port_get_properties(port, &properties);
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if (phy->protocol == SCIC_SDS_PHY_PROTOCOL_SATA) {
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u64 attached_sas_address;
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isci_phy->sas_phy.oob_mode = SATA_OOB_MODE;
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isci_phy->sas_phy.frame_rcvd_size = sizeof(struct dev_to_host_fis);
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/*
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* For direct-attached SATA devices, the SCI core will
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* automagically assign a SAS address to the end device
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* for the purpose of creating a port. This SAS address
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* will not be the same as assigned to the PHY and needs
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* to be obtained from struct scic_port_properties properties.
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*/
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attached_sas_address = properties.remote.sas_address.high;
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attached_sas_address <<= 32;
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attached_sas_address |= properties.remote.sas_address.low;
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swab64s(&attached_sas_address);
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memcpy(&isci_phy->sas_phy.attached_sas_addr,
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&attached_sas_address, sizeof(attached_sas_address));
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} else if (phy->protocol == SCIC_SDS_PHY_PROTOCOL_SAS) {
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isci_phy->sas_phy.oob_mode = SAS_OOB_MODE;
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isci_phy->sas_phy.frame_rcvd_size = sizeof(struct sas_identify_frame);
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/* Copy the attached SAS address from the IAF */
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memcpy(isci_phy->sas_phy.attached_sas_addr,
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isci_phy->frame_rcvd.iaf.sas_addr, SAS_ADDR_SIZE);
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} else {
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dev_err(&isci_host->pdev->dev, "%s: unkown target\n", __func__);
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success = false;
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}
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isci_phy->sas_phy.phy->negotiated_linkrate = sci_phy_linkrate(phy);
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spin_unlock_irqrestore(&isci_phy->sas_phy.frame_rcvd_lock, flags);
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/* Notify libsas that we have an address frame, if indeed
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* we've found an SSP, SMP, or STP target */
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if (success)
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isci_host->sas_ha.notify_port_event(&isci_phy->sas_phy,
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PORTE_BYTES_DMAED);
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}
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/**
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* isci_port_link_down() - This function is called by the sci core when a link
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* becomes inactive.
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* @isci_host: This parameter specifies the isci host object.
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* @phy: This parameter specifies the isci phy with the active link.
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* @port: This parameter specifies the isci port with the active link.
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*
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*/
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static void isci_port_link_down(struct isci_host *isci_host,
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struct isci_phy *isci_phy,
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struct isci_port *isci_port)
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{
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struct isci_remote_device *isci_device;
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dev_dbg(&isci_host->pdev->dev,
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"%s: isci_port = %p\n", __func__, isci_port);
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if (isci_port) {
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/* check to see if this is the last phy on this port. */
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if (isci_phy->sas_phy.port
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&& isci_phy->sas_phy.port->num_phys == 1) {
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/* change the state for all devices on this port.
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* The next task sent to this device will be returned
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* as SAS_TASK_UNDELIVERED, and the scsi mid layer
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* will remove the target
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*/
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list_for_each_entry(isci_device,
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&isci_port->remote_dev_list,
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node) {
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dev_dbg(&isci_host->pdev->dev,
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"%s: isci_device = %p\n",
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__func__, isci_device);
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isci_remote_device_change_state(isci_device,
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isci_stopping);
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}
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}
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isci_port_change_state(isci_port, isci_stopping);
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}
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/* Notify libsas of the borken link, this will trigger calls to our
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* isci_port_deformed and isci_dev_gone functions.
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*/
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sas_phy_disconnected(&isci_phy->sas_phy);
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isci_host->sas_ha.notify_phy_event(&isci_phy->sas_phy,
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PHYE_LOSS_OF_SIGNAL);
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isci_phy->isci_port = NULL;
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dev_dbg(&isci_host->pdev->dev,
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"%s: isci_port = %p - Done\n", __func__, isci_port);
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}
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/**
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* isci_port_ready() - This function is called by the sci core when a link
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* becomes ready.
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* @isci_host: This parameter specifies the isci host object.
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* @port: This parameter specifies the sci port with the active link.
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*
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*/
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static void isci_port_ready(struct isci_host *isci_host, struct isci_port *isci_port)
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{
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dev_dbg(&isci_host->pdev->dev,
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"%s: isci_port = %p\n", __func__, isci_port);
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complete_all(&isci_port->start_complete);
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isci_port_change_state(isci_port, isci_ready);
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return;
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}
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/**
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* isci_port_not_ready() - This function is called by the sci core when a link
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* is not ready. All remote devices on this link will be removed if they are
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* in the stopping state.
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* @isci_host: This parameter specifies the isci host object.
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* @port: This parameter specifies the sci port with the active link.
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*
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*/
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static void isci_port_not_ready(struct isci_host *isci_host, struct isci_port *isci_port)
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{
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dev_dbg(&isci_host->pdev->dev,
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"%s: isci_port = %p\n", __func__, isci_port);
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}
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static void isci_port_stop_complete(struct scic_sds_controller *scic,
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struct scic_sds_port *sci_port,
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enum sci_status completion_status)
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{
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dev_dbg(&scic_to_ihost(scic)->pdev->dev, "Port stop complete\n");
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}
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/**
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* isci_port_hard_reset_complete() - This function is called by the sci core
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* when the hard reset complete notification has been received.
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* @port: This parameter specifies the sci port with the active link.
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* @completion_status: This parameter specifies the core status for the reset
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* process.
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*
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*/
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static void isci_port_hard_reset_complete(struct isci_port *isci_port,
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enum sci_status completion_status)
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{
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dev_dbg(&isci_port->isci_host->pdev->dev,
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"%s: isci_port = %p, completion_status=%x\n",
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__func__, isci_port, completion_status);
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/* Save the status of the hard reset from the port. */
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isci_port->hard_reset_status = completion_status;
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complete_all(&isci_port->hard_reset_complete);
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}
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/* This method will return a true value if the specified phy can be assigned to
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* this port The following is a list of phys for each port that are allowed: -
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* Port 0 - 3 2 1 0 - Port 1 - 1 - Port 2 - 3 2 - Port 3 - 3 This method
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* doesn't preclude all configurations. It merely ensures that a phy is part
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* of the allowable set of phy identifiers for that port. For example, one
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* could assign phy 3 to port 0 and no other phys. Please refer to
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* scic_sds_port_is_phy_mask_valid() for information regarding whether the
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* phy_mask for a port can be supported. bool true if this is a valid phy
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* assignment for the port false if this is not a valid phy assignment for the
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* port
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*/
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bool scic_sds_port_is_valid_phy_assignment(struct scic_sds_port *sci_port,
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u32 phy_index)
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{
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/* Initialize to invalid value. */
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u32 existing_phy_index = SCI_MAX_PHYS;
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u32 index;
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if ((sci_port->physical_port_index == 1) && (phy_index != 1)) {
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return false;
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}
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if (sci_port->physical_port_index == 3 && phy_index != 3) {
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return false;
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}
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if (
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(sci_port->physical_port_index == 2)
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&& ((phy_index == 0) || (phy_index == 1))
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) {
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return false;
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}
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for (index = 0; index < SCI_MAX_PHYS; index++) {
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if ((sci_port->phy_table[index] != NULL)
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&& (index != phy_index)) {
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existing_phy_index = index;
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}
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}
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/*
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* Ensure that all of the phys in the port are capable of
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* operating at the same maximum link rate. */
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if (
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(existing_phy_index < SCI_MAX_PHYS)
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&& (sci_port->owning_controller->user_parameters.sds1.phys[
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phy_index].max_speed_generation !=
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sci_port->owning_controller->user_parameters.sds1.phys[
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existing_phy_index].max_speed_generation)
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)
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return false;
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return true;
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}
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/**
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*
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* @sci_port: This is the port object for which to determine if the phy mask
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* can be supported.
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*
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* This method will return a true value if the port's phy mask can be supported
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* by the SCU. The following is a list of valid PHY mask configurations for
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* each port: - Port 0 - [[3 2] 1] 0 - Port 1 - [1] - Port 2 - [[3] 2]
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* - Port 3 - [3] This method returns a boolean indication specifying if the
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* phy mask can be supported. true if this is a valid phy assignment for the
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* port false if this is not a valid phy assignment for the port
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*/
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static bool scic_sds_port_is_phy_mask_valid(
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struct scic_sds_port *sci_port,
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u32 phy_mask)
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{
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if (sci_port->physical_port_index == 0) {
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if (((phy_mask & 0x0F) == 0x0F)
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|| ((phy_mask & 0x03) == 0x03)
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|| ((phy_mask & 0x01) == 0x01)
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|| (phy_mask == 0))
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return true;
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} else if (sci_port->physical_port_index == 1) {
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if (((phy_mask & 0x02) == 0x02)
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|| (phy_mask == 0))
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return true;
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} else if (sci_port->physical_port_index == 2) {
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if (((phy_mask & 0x0C) == 0x0C)
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|| ((phy_mask & 0x04) == 0x04)
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|| (phy_mask == 0))
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return true;
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} else if (sci_port->physical_port_index == 3) {
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if (((phy_mask & 0x08) == 0x08)
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|| (phy_mask == 0))
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return true;
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}
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return false;
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}
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|
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/**
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*
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* @sci_port: This parameter specifies the port from which to return a
|
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* connected phy.
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*
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* This method retrieves a currently active (i.e. connected) phy contained in
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* the port. Currently, the lowest order phy that is connected is returned.
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* This method returns a pointer to a SCIS_SDS_PHY object. NULL This value is
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* returned if there are no currently active (i.e. connected to a remote end
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* point) phys contained in the port. All other values specify a struct scic_sds_phy
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* object that is active in the port.
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*/
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static struct scic_sds_phy *scic_sds_port_get_a_connected_phy(
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struct scic_sds_port *sci_port
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) {
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u32 index;
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struct scic_sds_phy *phy;
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|
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for (index = 0; index < SCI_MAX_PHYS; index++) {
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/*
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* Ensure that the phy is both part of the port and currently
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* connected to the remote end-point. */
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phy = sci_port->phy_table[index];
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if (
|
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(phy != NULL)
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&& scic_sds_port_active_phy(sci_port, phy)
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) {
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|
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;
|
|
}
|
|
|
|
/**
|
|
* 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");
|
|
}
|
|
}
|
|
|
|
static bool is_port_ready_state(enum scic_sds_port_states state)
|
|
{
|
|
switch (state) {
|
|
case SCI_BASE_PORT_STATE_READY:
|
|
case SCIC_SDS_PORT_READY_SUBSTATE_WAITING:
|
|
case SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL:
|
|
case SCIC_SDS_PORT_READY_SUBSTATE_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->state_machine;
|
|
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_base_state_machine_change_state(sm, state);
|
|
sci_port->ready_exit = false;
|
|
}
|
|
|
|
static void port_state_machine_stop(struct scic_sds_port *sci_port)
|
|
{
|
|
sci_port->ready_exit = true;
|
|
sci_base_state_machine_stop(&sci_port->state_machine);
|
|
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->state_machine;
|
|
|
|
scic_sds_port_activate_phy(sci_port, sci_phy, do_notify_user);
|
|
if (sm->current_state_id == SCI_BASE_PORT_STATE_RESETTING)
|
|
port_state_machine_change(sci_port, 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.
|
|
*/
|
|
port_state_machine_change(sci_port, 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(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);
|
|
}
|
|
}
|
|
|
|
/* --------------------------------------------------------------------------- */
|
|
|
|
/**
|
|
* 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 *sci_port)
|
|
{
|
|
port_state_machine_change(sci_port, 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 *sci_port,
|
|
struct scic_sds_phy *sci_phy)
|
|
{
|
|
enum sci_status status;
|
|
|
|
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, 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)
|
|
return status;
|
|
|
|
scic_sds_port_deactivate_phy(port, phy, true);
|
|
|
|
port->not_ready_reason = SCIC_PORT_NOT_READY_RECONFIGURING;
|
|
|
|
port_state_machine_change(port,
|
|
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);
|
|
|
|
port_state_machine_change(sci_port,
|
|
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;
|
|
|
|
port_state_machine_change(port,
|
|
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)
|
|
port_state_machine_change(sci_port,
|
|
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. */
|
|
port_state_machine_change(port,
|
|
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)
|
|
return status;
|
|
scic_sds_port_deactivate_phy(port, phy, true);
|
|
|
|
/* Re-enter the configuring state since this may be the last phy in
|
|
* the port
|
|
*/
|
|
port_state_machine_change(port,
|
|
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) {
|
|
port_state_machine_change(port,
|
|
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_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__);
|
|
}
|
|
|
|
/*
|
|
* ******************************************************************************
|
|
* * 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_base_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 */
|
|
port_state_machine_change(sci_port,
|
|
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_base_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);
|
|
}
|
|
|
|
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 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);
|
|
|
|
if (sci_port->ready_exit)
|
|
scic_sds_port_invalidate_dummy_remote_node(sci_port);
|
|
}
|
|
|
|
/*
|
|
* ******************************************************************************
|
|
* * 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_base_state_handlers(
|
|
sci_port,
|
|
SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING);
|
|
|
|
if (sci_port->active_phy_mask == 0) {
|
|
isci_port_not_ready(ihost, iport);
|
|
|
|
port_state_machine_change(sci_port,
|
|
SCIC_SDS_PORT_READY_SUBSTATE_WAITING);
|
|
} else if (sci_port->started_request_count == 0)
|
|
port_state_machine_change(sci_port,
|
|
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);
|
|
if (sci_port->ready_exit)
|
|
scic_sds_port_invalidate_dummy_remote_node(sci_port);
|
|
}
|
|
|
|
/* --------------------------------------------------------------------------- */
|
|
|
|
/**
|
|
*
|
|
* @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;
|
|
}
|
|
|
|
/*
|
|
* 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)
|
|
{
|
|
port_state_machine_stop(port);
|
|
|
|
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)
|
|
port_state_machine_change(sci_port,
|
|
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)
|
|
{
|
|
port_state_machine_change(port,
|
|
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);
|
|
}
|
|
|
|
enum sci_status scic_sds_port_start(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;
|
|
enum scic_sds_port_states state;
|
|
u32 phy_mask;
|
|
|
|
state = sci_port->state_machine.current_state_id;
|
|
if (state != SCI_BASE_PORT_STATE_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;
|
|
}
|
|
|
|
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) {
|
|
port_state_machine_change(sci_port,
|
|
SCI_BASE_PORT_STATE_READY);
|
|
|
|
return SCI_SUCCESS;
|
|
}
|
|
status = SCI_FAILURE;
|
|
}
|
|
|
|
if (status != SCI_SUCCESS)
|
|
scic_sds_port_destroy_dummy_resources(sci_port);
|
|
|
|
return status;
|
|
}
|
|
|
|
static struct scic_sds_port_state_handler scic_sds_port_state_handler_table[] = {
|
|
[SCI_BASE_PORT_STATE_STOPPED] = {
|
|
.stop_handler = scic_sds_port_stopped_state_stop_handler,
|
|
.destruct_handler = scic_sds_port_stopped_state_destruct_handler,
|
|
.reset_handler = scic_sds_port_default_reset_handler,
|
|
.add_phy_handler = scic_sds_port_stopped_state_add_phy_handler,
|
|
.remove_phy_handler = scic_sds_port_stopped_state_remove_phy_handler,
|
|
.frame_handler = scic_sds_port_default_frame_handler,
|
|
.event_handler = scic_sds_port_default_event_handler,
|
|
.link_up_handler = scic_sds_port_default_link_up_handler,
|
|
.link_down_handler = scic_sds_port_default_link_down_handler,
|
|
.start_io_handler = scic_sds_port_default_start_io_handler,
|
|
.complete_io_handler = scic_sds_port_default_complete_io_handler
|
|
},
|
|
[SCI_BASE_PORT_STATE_STOPPING] = {
|
|
.stop_handler = scic_sds_port_default_stop_handler,
|
|
.destruct_handler = scic_sds_port_default_destruct_handler,
|
|
.reset_handler = scic_sds_port_default_reset_handler,
|
|
.add_phy_handler = scic_sds_port_default_add_phy_handler,
|
|
.remove_phy_handler = scic_sds_port_default_remove_phy_handler,
|
|
.frame_handler = scic_sds_port_default_frame_handler,
|
|
.event_handler = scic_sds_port_default_event_handler,
|
|
.link_up_handler = scic_sds_port_default_link_up_handler,
|
|
.link_down_handler = scic_sds_port_default_link_down_handler,
|
|
.start_io_handler = scic_sds_port_default_start_io_handler,
|
|
.complete_io_handler = scic_sds_port_stopping_state_complete_io_handler
|
|
},
|
|
[SCI_BASE_PORT_STATE_READY] = {
|
|
.stop_handler = scic_sds_port_default_stop_handler,
|
|
.destruct_handler = scic_sds_port_default_destruct_handler,
|
|
.reset_handler = scic_sds_port_default_reset_handler,
|
|
.add_phy_handler = scic_sds_port_default_add_phy_handler,
|
|
.remove_phy_handler = scic_sds_port_default_remove_phy_handler,
|
|
.frame_handler = scic_sds_port_default_frame_handler,
|
|
.event_handler = scic_sds_port_default_event_handler,
|
|
.link_up_handler = scic_sds_port_default_link_up_handler,
|
|
.link_down_handler = scic_sds_port_default_link_down_handler,
|
|
.start_io_handler = scic_sds_port_default_start_io_handler,
|
|
.complete_io_handler = scic_sds_port_general_complete_io_handler
|
|
},
|
|
[SCIC_SDS_PORT_READY_SUBSTATE_WAITING] = {
|
|
.stop_handler = scic_sds_port_ready_substate_stop_handler,
|
|
.destruct_handler = scic_sds_port_default_destruct_handler,
|
|
.reset_handler = scic_sds_port_default_reset_handler,
|
|
.add_phy_handler = scic_sds_port_ready_substate_add_phy_handler,
|
|
.remove_phy_handler = scic_sds_port_default_remove_phy_handler,
|
|
.frame_handler = scic_sds_port_default_frame_handler,
|
|
.event_handler = scic_sds_port_default_event_handler,
|
|
.link_up_handler = scic_sds_port_ready_waiting_substate_link_up_handler,
|
|
.link_down_handler = scic_sds_port_default_link_down_handler,
|
|
.start_io_handler = scic_sds_port_ready_waiting_substate_start_io_handler,
|
|
.complete_io_handler = scic_sds_port_ready_substate_complete_io_handler,
|
|
},
|
|
[SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL] = {
|
|
.stop_handler = scic_sds_port_ready_substate_stop_handler,
|
|
.destruct_handler = scic_sds_port_default_destruct_handler,
|
|
.reset_handler = scic_sds_port_ready_operational_substate_reset_handler,
|
|
.add_phy_handler = scic_sds_port_ready_substate_add_phy_handler,
|
|
.remove_phy_handler = scic_sds_port_ready_substate_remove_phy_handler,
|
|
.frame_handler = scic_sds_port_default_frame_handler,
|
|
.event_handler = scic_sds_port_default_event_handler,
|
|
.link_up_handler = scic_sds_port_ready_operational_substate_link_up_handler,
|
|
.link_down_handler = scic_sds_port_ready_operational_substate_link_down_handler,
|
|
.start_io_handler = scic_sds_port_ready_operational_substate_start_io_handler,
|
|
.complete_io_handler = scic_sds_port_ready_substate_complete_io_handler,
|
|
},
|
|
[SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING] = {
|
|
.stop_handler = scic_sds_port_ready_substate_stop_handler,
|
|
.destruct_handler = scic_sds_port_default_destruct_handler,
|
|
.reset_handler = scic_sds_port_default_reset_handler,
|
|
.add_phy_handler = scic_sds_port_ready_configuring_substate_add_phy_handler,
|
|
.remove_phy_handler = scic_sds_port_ready_configuring_substate_remove_phy_handler,
|
|
.frame_handler = scic_sds_port_default_frame_handler,
|
|
.event_handler = scic_sds_port_default_event_handler,
|
|
.link_up_handler = scic_sds_port_default_link_up_handler,
|
|
.link_down_handler = scic_sds_port_default_link_down_handler,
|
|
.start_io_handler = scic_sds_port_default_start_io_handler,
|
|
.complete_io_handler = scic_sds_port_ready_configuring_substate_complete_io_handler
|
|
},
|
|
[SCI_BASE_PORT_STATE_RESETTING] = {
|
|
.stop_handler = scic_sds_port_reset_state_stop_handler,
|
|
.destruct_handler = scic_sds_port_default_destruct_handler,
|
|
.reset_handler = scic_sds_port_default_reset_handler,
|
|
.add_phy_handler = scic_sds_port_default_add_phy_handler,
|
|
.remove_phy_handler = scic_sds_port_default_remove_phy_handler,
|
|
.frame_handler = scic_sds_port_default_frame_handler,
|
|
.event_handler = scic_sds_port_default_event_handler,
|
|
.link_up_handler = scic_sds_port_reset_state_link_up_handler,
|
|
.link_down_handler = scic_sds_port_reset_state_link_down_handler,
|
|
.start_io_handler = scic_sds_port_default_start_io_handler,
|
|
.complete_io_handler = scic_sds_port_general_complete_io_handler
|
|
},
|
|
[SCI_BASE_PORT_STATE_FAILED] = {
|
|
.stop_handler = scic_sds_port_default_stop_handler,
|
|
.destruct_handler = scic_sds_port_default_destruct_handler,
|
|
.reset_handler = scic_sds_port_default_reset_handler,
|
|
.add_phy_handler = scic_sds_port_default_add_phy_handler,
|
|
.remove_phy_handler = scic_sds_port_default_remove_phy_handler,
|
|
.frame_handler = scic_sds_port_default_frame_handler,
|
|
.event_handler = scic_sds_port_default_event_handler,
|
|
.link_up_handler = scic_sds_port_default_link_up_handler,
|
|
.link_down_handler = scic_sds_port_default_link_down_handler,
|
|
.start_io_handler = scic_sds_port_default_start_io_handler,
|
|
.complete_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);
|
|
}
|
|
|
|
/*
|
|
* ******************************************************************************
|
|
* * 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 */
|
|
port_state_machine_change(sci_port,
|
|
SCIC_SDS_PORT_READY_SUBSTATE_WAITING);
|
|
}
|
|
|
|
/**
|
|
*
|
|
* @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,
|
|
},
|
|
[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
|
|
},
|
|
[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_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_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)
|
|
{
|
|
unsigned long flags;
|
|
enum sci_status status;
|
|
int 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) - sending link down to libsas for phy %p\n",
|
|
__func__, iport, iport->hard_reset_status, iphy);
|
|
|
|
isci_port_link_down(ihost, iphy, iport);
|
|
}
|
|
|
|
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);
|
|
}
|