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- /*
- * This file is provided under a dual BSD/GPLv2 license. When using or
- * redistributing this file, you may do so under either license.
- *
- * GPL LICENSE SUMMARY
- *
- * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of version 2 of the GNU General Public License as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
- * The full GNU General Public License is included in this distribution
- * in the file called LICENSE.GPL.
- *
- * BSD LICENSE
- *
- * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * * Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- * * Neither the name of Intel Corporation nor the names of its
- * contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
- #include "isci.h"
- #include "port.h"
- #include "request.h"
- #include "timers.h"
- #define SCIC_SDS_PORT_HARD_RESET_TIMEOUT (1000)
- #define SCU_DUMMY_INDEX (0xFFFF)
- static void isci_port_change_state(struct isci_port *iport, enum isci_status status)
- {
- unsigned long flags;
- dev_dbg(&iport->isci_host->pdev->dev,
- "%s: iport = %p, state = 0x%x\n",
- __func__, iport, status);
- /* XXX pointless lock */
- spin_lock_irqsave(&iport->state_lock, flags);
- iport->status = status;
- spin_unlock_irqrestore(&iport->state_lock, flags);
- }
- /*
- * This function will indicate which protocols are supported by this port.
- * @sci_port: a handle corresponding to the SAS port for which to return the
- * supported protocols.
- * @protocols: This parameter specifies a pointer to a data structure
- * which the core will copy the protocol values for the port from the
- * transmit_identification register.
- */
- static void
- scic_sds_port_get_protocols(struct scic_sds_port *sci_port,
- struct scic_phy_proto *protocols)
- {
- u8 index;
- protocols->all = 0;
- for (index = 0; index < SCI_MAX_PHYS; index++) {
- if (sci_port->phy_table[index] != NULL) {
- scic_sds_phy_get_protocols(sci_port->phy_table[index],
- protocols);
- }
- }
- }
- /**
- * This method requests a list (mask) of the phys contained in the supplied SAS
- * port.
- * @sci_port: a handle corresponding to the SAS port for which to return the
- * phy mask.
- *
- * Return a bit mask indicating which phys are a part of this port. Each bit
- * corresponds to a phy identifier (e.g. bit 0 = phy id 0).
- */
- static u32 scic_sds_port_get_phys(struct scic_sds_port *sci_port)
- {
- u32 index;
- u32 mask;
- mask = 0;
- for (index = 0; index < SCI_MAX_PHYS; index++) {
- if (sci_port->phy_table[index] != NULL) {
- mask |= (1 << index);
- }
- }
- return mask;
- }
- /**
- * scic_port_get_properties() - This method simply returns the properties
- * regarding the port, such as: physical index, protocols, sas address, etc.
- * @port: this parameter specifies the port for which to retrieve the physical
- * index.
- * @properties: This parameter specifies the properties structure into which to
- * copy the requested information.
- *
- * Indicate if the user specified a valid port. SCI_SUCCESS This value is
- * returned if the specified port was valid. SCI_FAILURE_INVALID_PORT This
- * value is returned if the specified port is not valid. When this value is
- * returned, no data is copied to the properties output parameter.
- */
- static enum sci_status scic_port_get_properties(struct scic_sds_port *port,
- struct scic_port_properties *prop)
- {
- if ((port == NULL) ||
- (port->logical_port_index == SCIC_SDS_DUMMY_PORT))
- return SCI_FAILURE_INVALID_PORT;
- prop->index = port->logical_port_index;
- prop->phy_mask = scic_sds_port_get_phys(port);
- scic_sds_port_get_sas_address(port, &prop->local.sas_address);
- scic_sds_port_get_protocols(port, &prop->local.protocols);
- scic_sds_port_get_attached_sas_address(port, &prop->remote.sas_address);
- return SCI_SUCCESS;
- }
- static void isci_port_link_up(struct isci_host *isci_host,
- struct scic_sds_port *port,
- struct scic_sds_phy *phy)
- {
- unsigned long flags;
- struct scic_port_properties properties;
- struct isci_phy *isci_phy = sci_phy_to_iphy(phy);
- struct isci_port *isci_port = sci_port_to_iport(port);
- unsigned long success = true;
- BUG_ON(isci_phy->isci_port != NULL);
- isci_phy->isci_port = isci_port;
- dev_dbg(&isci_host->pdev->dev,
- "%s: isci_port = %p\n",
- __func__, isci_port);
- spin_lock_irqsave(&isci_phy->sas_phy.frame_rcvd_lock, flags);
- isci_port_change_state(isci_phy->isci_port, isci_starting);
- scic_port_get_properties(port, &properties);
- if (phy->protocol == SCIC_SDS_PHY_PROTOCOL_SATA) {
- u64 attached_sas_address;
- isci_phy->sas_phy.oob_mode = SATA_OOB_MODE;
- isci_phy->sas_phy.frame_rcvd_size = sizeof(struct dev_to_host_fis);
- /*
- * For direct-attached SATA devices, the SCI core will
- * automagically assign a SAS address to the end device
- * for the purpose of creating a port. This SAS address
- * will not be the same as assigned to the PHY and needs
- * to be obtained from struct scic_port_properties properties.
- */
- attached_sas_address = properties.remote.sas_address.high;
- attached_sas_address <<= 32;
- attached_sas_address |= properties.remote.sas_address.low;
- swab64s(&attached_sas_address);
- memcpy(&isci_phy->sas_phy.attached_sas_addr,
- &attached_sas_address, sizeof(attached_sas_address));
- } else if (phy->protocol == SCIC_SDS_PHY_PROTOCOL_SAS) {
- isci_phy->sas_phy.oob_mode = SAS_OOB_MODE;
- isci_phy->sas_phy.frame_rcvd_size = sizeof(struct sas_identify_frame);
- /* Copy the attached SAS address from the IAF */
- memcpy(isci_phy->sas_phy.attached_sas_addr,
- isci_phy->frame_rcvd.iaf.sas_addr, SAS_ADDR_SIZE);
- } else {
- dev_err(&isci_host->pdev->dev, "%s: unkown target\n", __func__);
- success = false;
- }
- isci_phy->sas_phy.phy->negotiated_linkrate = sci_phy_linkrate(phy);
- spin_unlock_irqrestore(&isci_phy->sas_phy.frame_rcvd_lock, flags);
- /* Notify libsas that we have an address frame, if indeed
- * we've found an SSP, SMP, or STP target */
- if (success)
- isci_host->sas_ha.notify_port_event(&isci_phy->sas_phy,
- PORTE_BYTES_DMAED);
- }
- /**
- * isci_port_link_down() - This function is called by the sci core when a link
- * becomes inactive.
- * @isci_host: This parameter specifies the isci host object.
- * @phy: This parameter specifies the isci phy with the active link.
- * @port: This parameter specifies the isci port with the active link.
- *
- */
- static void isci_port_link_down(struct isci_host *isci_host,
- struct isci_phy *isci_phy,
- struct isci_port *isci_port)
- {
- struct isci_remote_device *isci_device;
- dev_dbg(&isci_host->pdev->dev,
- "%s: isci_port = %p\n", __func__, isci_port);
- if (isci_port) {
- /* check to see if this is the last phy on this port. */
- if (isci_phy->sas_phy.port
- && isci_phy->sas_phy.port->num_phys == 1) {
- /* change the state for all devices on this port.
- * The next task sent to this device will be returned
- * as SAS_TASK_UNDELIVERED, and the scsi mid layer
- * will remove the target
- */
- list_for_each_entry(isci_device,
- &isci_port->remote_dev_list,
- node) {
- dev_dbg(&isci_host->pdev->dev,
- "%s: isci_device = %p\n",
- __func__, isci_device);
- isci_remote_device_change_state(isci_device,
- isci_stopping);
- }
- }
- isci_port_change_state(isci_port, isci_stopping);
- }
- /* Notify libsas of the borken link, this will trigger calls to our
- * isci_port_deformed and isci_dev_gone functions.
- */
- sas_phy_disconnected(&isci_phy->sas_phy);
- isci_host->sas_ha.notify_phy_event(&isci_phy->sas_phy,
- PHYE_LOSS_OF_SIGNAL);
- isci_phy->isci_port = NULL;
- dev_dbg(&isci_host->pdev->dev,
- "%s: isci_port = %p - Done\n", __func__, isci_port);
- }
- /**
- * isci_port_ready() - This function is called by the sci core when a link
- * becomes ready.
- * @isci_host: This parameter specifies the isci host object.
- * @port: This parameter specifies the sci port with the active link.
- *
- */
- static void isci_port_ready(struct isci_host *isci_host, struct isci_port *isci_port)
- {
- dev_dbg(&isci_host->pdev->dev,
- "%s: isci_port = %p\n", __func__, isci_port);
- complete_all(&isci_port->start_complete);
- isci_port_change_state(isci_port, isci_ready);
- return;
- }
- /**
- * isci_port_not_ready() - This function is called by the sci core when a link
- * is not ready. All remote devices on this link will be removed if they are
- * in the stopping state.
- * @isci_host: This parameter specifies the isci host object.
- * @port: This parameter specifies the sci port with the active link.
- *
- */
- static void isci_port_not_ready(struct isci_host *isci_host, struct isci_port *isci_port)
- {
- dev_dbg(&isci_host->pdev->dev,
- "%s: isci_port = %p\n", __func__, isci_port);
- }
- static void isci_port_stop_complete(struct scic_sds_controller *scic,
- struct scic_sds_port *sci_port,
- enum sci_status completion_status)
- {
- dev_dbg(&scic_to_ihost(scic)->pdev->dev, "Port stop complete\n");
- }
- /**
- * isci_port_hard_reset_complete() - This function is called by the sci core
- * when the hard reset complete notification has been received.
- * @port: This parameter specifies the sci port with the active link.
- * @completion_status: This parameter specifies the core status for the reset
- * process.
- *
- */
- static void isci_port_hard_reset_complete(struct isci_port *isci_port,
- enum sci_status completion_status)
- {
- dev_dbg(&isci_port->isci_host->pdev->dev,
- "%s: isci_port = %p, completion_status=%x\n",
- __func__, isci_port, completion_status);
- /* Save the status of the hard reset from the port. */
- isci_port->hard_reset_status = completion_status;
- complete_all(&isci_port->hard_reset_complete);
- }
- /* This method will return a true value if the specified phy can be assigned to
- * this port The following is a list of phys for each port that are allowed: -
- * Port 0 - 3 2 1 0 - Port 1 - 1 - Port 2 - 3 2 - Port 3 - 3 This method
- * doesn't preclude all configurations. It merely ensures that a phy is part
- * of the allowable set of phy identifiers for that port. For example, one
- * could assign phy 3 to port 0 and no other phys. Please refer to
- * scic_sds_port_is_phy_mask_valid() for information regarding whether the
- * phy_mask for a port can be supported. bool true if this is a valid phy
- * assignment for the port false if this is not a valid phy assignment for the
- * port
- */
- bool scic_sds_port_is_valid_phy_assignment(struct scic_sds_port *sci_port,
- u32 phy_index)
- {
- /* Initialize to invalid value. */
- u32 existing_phy_index = SCI_MAX_PHYS;
- u32 index;
- if ((sci_port->physical_port_index == 1) && (phy_index != 1)) {
- return false;
- }
- if (sci_port->physical_port_index == 3 && phy_index != 3) {
- return false;
- }
- if (
- (sci_port->physical_port_index == 2)
- && ((phy_index == 0) || (phy_index == 1))
- ) {
- return false;
- }
- for (index = 0; index < SCI_MAX_PHYS; index++) {
- if ((sci_port->phy_table[index] != NULL)
- && (index != phy_index)) {
- existing_phy_index = index;
- }
- }
- /*
- * Ensure that all of the phys in the port are capable of
- * operating at the same maximum link rate. */
- if (
- (existing_phy_index < SCI_MAX_PHYS)
- && (sci_port->owning_controller->user_parameters.sds1.phys[
- phy_index].max_speed_generation !=
- sci_port->owning_controller->user_parameters.sds1.phys[
- existing_phy_index].max_speed_generation)
- )
- return false;
- return true;
- }
- /**
- *
- * @sci_port: This is the port object for which to determine if the phy mask
- * can be supported.
- *
- * This method will return a true value if the port's phy mask can be supported
- * by the SCU. The following is a list of valid PHY mask configurations for
- * each port: - Port 0 - [[3 2] 1] 0 - Port 1 - [1] - Port 2 - [[3] 2]
- * - Port 3 - [3] This method returns a boolean indication specifying if the
- * phy mask can be supported. true if this is a valid phy assignment for the
- * port false if this is not a valid phy assignment for the port
- */
- static bool scic_sds_port_is_phy_mask_valid(
- struct scic_sds_port *sci_port,
- u32 phy_mask)
- {
- if (sci_port->physical_port_index == 0) {
- if (((phy_mask & 0x0F) == 0x0F)
- || ((phy_mask & 0x03) == 0x03)
- || ((phy_mask & 0x01) == 0x01)
- || (phy_mask == 0))
- return true;
- } else if (sci_port->physical_port_index == 1) {
- if (((phy_mask & 0x02) == 0x02)
- || (phy_mask == 0))
- return true;
- } else if (sci_port->physical_port_index == 2) {
- if (((phy_mask & 0x0C) == 0x0C)
- || ((phy_mask & 0x04) == 0x04)
- || (phy_mask == 0))
- return true;
- } else if (sci_port->physical_port_index == 3) {
- if (((phy_mask & 0x08) == 0x08)
- || (phy_mask == 0))
- return true;
- }
- return false;
- }
- /**
- *
- * @sci_port: This parameter specifies the port from which to return a
- * connected phy.
- *
- * This method retrieves a currently active (i.e. connected) phy contained in
- * the port. Currently, the lowest order phy that is connected is returned.
- * This method returns a pointer to a SCIS_SDS_PHY object. NULL This value is
- * returned if there are no currently active (i.e. connected to a remote end
- * point) phys contained in the port. All other values specify a struct scic_sds_phy
- * object that is active in the port.
- */
- static struct scic_sds_phy *scic_sds_port_get_a_connected_phy(
- struct scic_sds_port *sci_port
- ) {
- u32 index;
- struct scic_sds_phy *phy;
- for (index = 0; index < SCI_MAX_PHYS; index++) {
- /*
- * Ensure that the phy is both part of the port and currently
- * connected to the remote end-point. */
- phy = sci_port->phy_table[index];
- if (
- (phy != NULL)
- && scic_sds_port_active_phy(sci_port, phy)
- ) {
- return phy;
- }
- }
- return NULL;
- }
- /**
- * scic_sds_port_set_phy() -
- * @out]: port The port object to which the phy assignement is being made.
- * @out]: phy The phy which is being assigned to the port.
- *
- * This method attempts to make the assignment of the phy to the port. If
- * successful the phy is assigned to the ports phy table. bool true if the phy
- * assignment can be made. false if the phy assignement can not be made. This
- * is a functional test that only fails if the phy is currently assigned to a
- * different port.
- */
- static enum sci_status scic_sds_port_set_phy(
- struct scic_sds_port *port,
- struct scic_sds_phy *phy)
- {
- /*
- * Check to see if we can add this phy to a port
- * that means that the phy is not part of a port and that the port does
- * not already have a phy assinged to the phy index. */
- if (
- (port->phy_table[phy->phy_index] == NULL)
- && (phy_get_non_dummy_port(phy) == NULL)
- && scic_sds_port_is_valid_phy_assignment(port, phy->phy_index)
- ) {
- /*
- * Phy is being added in the stopped state so we are in MPC mode
- * make logical port index = physical port index */
- port->logical_port_index = port->physical_port_index;
- port->phy_table[phy->phy_index] = phy;
- scic_sds_phy_set_port(phy, port);
- return SCI_SUCCESS;
- }
- return SCI_FAILURE;
- }
- /**
- * scic_sds_port_clear_phy() -
- * @out]: port The port from which the phy is being cleared.
- * @out]: phy The phy being cleared from the port.
- *
- * This method will clear the phy assigned to this port. This method fails if
- * this phy is not currently assinged to this port. bool true if the phy is
- * removed from the port. false if this phy is not assined to this port.
- */
- static enum sci_status scic_sds_port_clear_phy(
- struct scic_sds_port *port,
- struct scic_sds_phy *phy)
- {
- /* Make sure that this phy is part of this port */
- if (port->phy_table[phy->phy_index] == phy &&
- phy_get_non_dummy_port(phy) == port) {
- struct scic_sds_controller *scic = port->owning_controller;
- struct isci_host *ihost = scic_to_ihost(scic);
- /* Yep it is assigned to this port so remove it */
- scic_sds_phy_set_port(phy, &ihost->ports[SCI_MAX_PORTS].sci);
- port->phy_table[phy->phy_index] = NULL;
- return SCI_SUCCESS;
- }
- return SCI_FAILURE;
- }
- /**
- * scic_sds_port_add_phy() -
- * @sci_port: This parameter specifies the port in which the phy will be added.
- * @sci_phy: This parameter is the phy which is to be added to the port.
- *
- * This method will add a PHY to the selected port. This method returns an
- * enum sci_status. SCI_SUCCESS the phy has been added to the port. Any other status
- * is failre to add the phy to the port.
- */
- enum sci_status scic_sds_port_add_phy(
- struct scic_sds_port *sci_port,
- struct scic_sds_phy *sci_phy)
- {
- return sci_port->state_handlers->add_phy_handler(
- sci_port, sci_phy);
- }
- /**
- * scic_sds_port_remove_phy() -
- * @sci_port: This parameter specifies the port in which the phy will be added.
- * @sci_phy: This parameter is the phy which is to be added to the port.
- *
- * This method will remove the PHY from the selected PORT. This method returns
- * an enum sci_status. SCI_SUCCESS the phy has been removed from the port. Any other
- * status is failre to add the phy to the port.
- */
- enum sci_status scic_sds_port_remove_phy(
- struct scic_sds_port *sci_port,
- struct scic_sds_phy *sci_phy)
- {
- return sci_port->state_handlers->remove_phy_handler(
- sci_port, sci_phy);
- }
- /**
- * This method requests the SAS address for the supplied SAS port from the SCI
- * implementation.
- * @sci_port: a handle corresponding to the SAS port for which to return the
- * SAS address.
- * @sas_address: This parameter specifies a pointer to a SAS address structure
- * into which the core will copy the SAS address for the port.
- *
- */
- void scic_sds_port_get_sas_address(
- struct scic_sds_port *sci_port,
- struct sci_sas_address *sas_address)
- {
- u32 index;
- sas_address->high = 0;
- sas_address->low = 0;
- for (index = 0; index < SCI_MAX_PHYS; index++) {
- if (sci_port->phy_table[index] != NULL) {
- scic_sds_phy_get_sas_address(sci_port->phy_table[index], sas_address);
- }
- }
- }
- /*
- * This function requests the SAS address for the device directly attached to
- * this SAS port.
- * @sci_port: a handle corresponding to the SAS port for which to return the
- * SAS address.
- * @sas_address: This parameter specifies a pointer to a SAS address structure
- * into which the core will copy the SAS address for the device directly
- * attached to the port.
- *
- */
- void scic_sds_port_get_attached_sas_address(
- struct scic_sds_port *sci_port,
- struct sci_sas_address *sas_address)
- {
- struct scic_sds_phy *sci_phy;
- /*
- * Ensure that the phy is both part of the port and currently
- * connected to the remote end-point.
- */
- sci_phy = scic_sds_port_get_a_connected_phy(sci_port);
- if (sci_phy) {
- if (sci_phy->protocol != SCIC_SDS_PHY_PROTOCOL_SATA) {
- scic_sds_phy_get_attached_sas_address(sci_phy,
- sas_address);
- } else {
- scic_sds_phy_get_sas_address(sci_phy, sas_address);
- sas_address->low += sci_phy->phy_index;
- }
- } else {
- sas_address->high = 0;
- sas_address->low = 0;
- }
- }
- /**
- * scic_sds_port_construct_dummy_rnc() - create dummy rnc for si workaround
- *
- * @sci_port: logical port on which we need to create the remote node context
- * @rni: remote node index for this remote node context.
- *
- * This routine will construct a dummy remote node context data structure
- * This structure will be posted to the hardware to work around a scheduler
- * error in the hardware.
- */
- static void scic_sds_port_construct_dummy_rnc(struct scic_sds_port *sci_port, u16 rni)
- {
- union scu_remote_node_context *rnc;
- rnc = &sci_port->owning_controller->remote_node_context_table[rni];
- memset(rnc, 0, sizeof(union scu_remote_node_context));
- rnc->ssp.remote_sas_address_hi = 0;
- rnc->ssp.remote_sas_address_lo = 0;
- rnc->ssp.remote_node_index = rni;
- rnc->ssp.remote_node_port_width = 1;
- rnc->ssp.logical_port_index = sci_port->physical_port_index;
- rnc->ssp.nexus_loss_timer_enable = false;
- rnc->ssp.check_bit = false;
- rnc->ssp.is_valid = true;
- rnc->ssp.is_remote_node_context = true;
- rnc->ssp.function_number = 0;
- rnc->ssp.arbitration_wait_time = 0;
- }
- /**
- * scic_sds_port_construct_dummy_task() - create dummy task for si workaround
- * @sci_port The logical port on which we need to create the
- * remote node context.
- * context.
- * @tci The remote node index for this remote node context.
- *
- * This routine will construct a dummy task context data structure. This
- * structure will be posted to the hardwre to work around a scheduler error
- * in the hardware.
- *
- */
- static void scic_sds_port_construct_dummy_task(struct scic_sds_port *sci_port, u16 tci)
- {
- struct scu_task_context *task_context;
- task_context = scic_sds_controller_get_task_context_buffer(sci_port->owning_controller, tci);
- memset(task_context, 0, sizeof(struct scu_task_context));
- task_context->abort = 0;
- task_context->priority = 0;
- task_context->initiator_request = 1;
- task_context->connection_rate = 1;
- task_context->protocol_engine_index = 0;
- task_context->logical_port_index = sci_port->physical_port_index;
- task_context->protocol_type = SCU_TASK_CONTEXT_PROTOCOL_SSP;
- task_context->task_index = scic_sds_io_tag_get_index(tci);
- task_context->valid = SCU_TASK_CONTEXT_VALID;
- task_context->context_type = SCU_TASK_CONTEXT_TYPE;
- task_context->remote_node_index = sci_port->reserved_rni;
- task_context->command_code = 0;
- task_context->link_layer_control = 0;
- task_context->do_not_dma_ssp_good_response = 1;
- task_context->strict_ordering = 0;
- task_context->control_frame = 0;
- task_context->timeout_enable = 0;
- task_context->block_guard_enable = 0;
- task_context->address_modifier = 0;
- task_context->task_phase = 0x01;
- }
- static void scic_sds_port_destroy_dummy_resources(struct scic_sds_port *sci_port)
- {
- struct scic_sds_controller *scic = sci_port->owning_controller;
- if (sci_port->reserved_tci != SCU_DUMMY_INDEX)
- scic_controller_free_io_tag(scic, sci_port->reserved_tci);
- if (sci_port->reserved_rni != SCU_DUMMY_INDEX)
- scic_sds_remote_node_table_release_remote_node_index(&scic->available_remote_nodes,
- 1, sci_port->reserved_rni);
- sci_port->reserved_rni = SCU_DUMMY_INDEX;
- sci_port->reserved_tci = SCU_DUMMY_INDEX;
- }
- /**
- * This method performs initialization of the supplied port. Initialization
- * includes: - state machine initialization - member variable initialization
- * - configuring the phy_mask
- * @sci_port:
- * @transport_layer_registers:
- * @port_task_scheduler_registers:
- * @port_configuration_regsiter:
- *
- * enum sci_status SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION This value is returned
- * if the phy being added to the port
- */
- enum sci_status scic_sds_port_initialize(
- struct scic_sds_port *sci_port,
- void __iomem *port_task_scheduler_registers,
- void __iomem *port_configuration_regsiter,
- void __iomem *viit_registers)
- {
- sci_port->port_task_scheduler_registers = port_task_scheduler_registers;
- sci_port->port_pe_configuration_register = port_configuration_regsiter;
- sci_port->viit_registers = viit_registers;
- return SCI_SUCCESS;
- }
- /**
- * scic_port_hard_reset() - perform port hard reset
- * @port: a handle corresponding to the SAS port to be hard reset.
- * @reset_timeout: This parameter specifies the number of milliseconds in which
- * the port reset operation should complete.
- *
- * The SCI User callback in scic_user_callbacks_t will only be called once for
- * each phy in the SAS Port at completion of the hard reset sequence. Return a
- * status indicating whether the hard reset started successfully. SCI_SUCCESS
- * This value is returned if the hard reset operation started successfully.
- */
- static enum sci_status scic_port_hard_reset(struct scic_sds_port *port,
- u32 reset_timeout)
- {
- return port->state_handlers->reset_handler(
- port, reset_timeout);
- }
- /**
- * This method assigns the direct attached device ID for this port.
- *
- * @param[in] sci_port The port for which the direct attached device id is to
- * be assigned.
- * @param[in] device_id The direct attached device ID to assign to the port.
- * This will be the RNi for the device
- */
- void scic_sds_port_setup_transports(
- struct scic_sds_port *sci_port,
- u32 device_id)
- {
- u8 index;
- for (index = 0; index < SCI_MAX_PHYS; index++) {
- if (sci_port->active_phy_mask & (1 << index))
- scic_sds_phy_setup_transport(sci_port->phy_table[index], device_id);
- }
- }
- /**
- *
- * @sci_port: This is the port on which the phy should be enabled.
- * @sci_phy: This is the specific phy which to enable.
- * @do_notify_user: This parameter specifies whether to inform the user (via
- * scic_cb_port_link_up()) as to the fact that a new phy as become ready.
- *
- * This function will activate the phy in the port.
- * Activation includes: - adding
- * the phy to the port - enabling the Protocol Engine in the silicon. -
- * notifying the user that the link is up. none
- */
- static void scic_sds_port_activate_phy(struct scic_sds_port *sci_port,
- struct scic_sds_phy *sci_phy,
- bool do_notify_user)
- {
- struct scic_sds_controller *scic = sci_port->owning_controller;
- struct isci_host *ihost = scic_to_ihost(scic);
- if (sci_phy->protocol != SCIC_SDS_PHY_PROTOCOL_SATA)
- scic_sds_phy_resume(sci_phy);
- sci_port->active_phy_mask |= 1 << sci_phy->phy_index;
- scic_sds_controller_clear_invalid_phy(scic, sci_phy);
- if (do_notify_user == true)
- isci_port_link_up(ihost, sci_port, sci_phy);
- }
- void scic_sds_port_deactivate_phy(struct scic_sds_port *sci_port,
- struct scic_sds_phy *sci_phy,
- bool do_notify_user)
- {
- struct scic_sds_controller *scic = scic_sds_port_get_controller(sci_port);
- struct isci_port *iport = sci_port_to_iport(sci_port);
- struct isci_host *ihost = scic_to_ihost(scic);
- struct isci_phy *iphy = sci_phy_to_iphy(sci_phy);
- sci_port->active_phy_mask &= ~(1 << sci_phy->phy_index);
- sci_phy->max_negotiated_speed = SAS_LINK_RATE_UNKNOWN;
- /* Re-assign the phy back to the LP as if it were a narrow port */
- writel(sci_phy->phy_index,
- &sci_port->port_pe_configuration_register[sci_phy->phy_index]);
- if (do_notify_user == true)
- isci_port_link_down(ihost, iphy, iport);
- }
- /**
- *
- * @sci_port: This is the port on which the phy should be disabled.
- * @sci_phy: This is the specific phy which to disabled.
- *
- * This function will disable the phy and report that the phy is not valid for
- * this port object. None
- */
- static void scic_sds_port_invalid_link_up(struct scic_sds_port *sci_port,
- struct scic_sds_phy *sci_phy)
- {
- struct scic_sds_controller *scic = sci_port->owning_controller;
- /*
- * Check to see if we have alreay reported this link as bad and if
- * not go ahead and tell the SCI_USER that we have discovered an
- * invalid link.
- */
- if ((scic->invalid_phy_mask & (1 << sci_phy->phy_index)) == 0) {
- scic_sds_controller_set_invalid_phy(scic, sci_phy);
- dev_warn(&scic_to_ihost(scic)->pdev->dev, "Invalid link up!\n");
- }
- }
- /**
- * scic_sds_port_general_link_up_handler - phy can be assigned to port?
- * @sci_port: scic_sds_port object for which has a phy that has gone link up.
- * @sci_phy: This is the struct scic_sds_phy object that has gone link up.
- * @do_notify_user: This parameter specifies whether to inform the user (via
- * scic_cb_port_link_up()) as to the fact that a new phy as become ready.
- *
- * Determine if this phy can be assigned to this
- * port . If the phy is not a valid PHY for
- * this port then the function will notify the user. A PHY can only be
- * part of a port if it's attached SAS ADDRESS is the same as all other PHYs in
- * the same port. none
- */
- static void scic_sds_port_general_link_up_handler(struct scic_sds_port *sci_port,
- struct scic_sds_phy *sci_phy,
- bool do_notify_user)
- {
- struct sci_sas_address port_sas_address;
- struct sci_sas_address phy_sas_address;
- scic_sds_port_get_attached_sas_address(sci_port, &port_sas_address);
- scic_sds_phy_get_attached_sas_address(sci_phy, &phy_sas_address);
- /* If the SAS address of the new phy matches the SAS address of
- * other phys in the port OR this is the first phy in the port,
- * then activate the phy and allow it to be used for operations
- * in this port.
- */
- if ((phy_sas_address.high == port_sas_address.high &&
- phy_sas_address.low == port_sas_address.low) ||
- sci_port->active_phy_mask == 0) {
- struct sci_base_state_machine *sm = &sci_port->state_machine;
- scic_sds_port_activate_phy(sci_port, sci_phy, do_notify_user);
- if (sm->current_state_id == SCI_BASE_PORT_STATE_RESETTING)
- sci_base_state_machine_change_state(sm, SCI_BASE_PORT_STATE_READY);
- } else
- scic_sds_port_invalid_link_up(sci_port, sci_phy);
- }
- /**
- * This method returns false if the port only has a single phy object assigned.
- * If there are no phys or more than one phy then the method will return
- * true.
- * @sci_port: The port for which the wide port condition is to be checked.
- *
- * bool true Is returned if this is a wide ported port. false Is returned if
- * this is a narrow port.
- */
- static bool scic_sds_port_is_wide(struct scic_sds_port *sci_port)
- {
- u32 index;
- u32 phy_count = 0;
- for (index = 0; index < SCI_MAX_PHYS; index++) {
- if (sci_port->phy_table[index] != NULL) {
- phy_count++;
- }
- }
- return phy_count != 1;
- }
- /**
- * This method is called by the PHY object when the link is detected. if the
- * port wants the PHY to continue on to the link up state then the port
- * layer must return true. If the port object returns false the phy object
- * must halt its attempt to go link up.
- * @sci_port: The port associated with the phy object.
- * @sci_phy: The phy object that is trying to go link up.
- *
- * true if the phy object can continue to the link up condition. true Is
- * returned if this phy can continue to the ready state. false Is returned if
- * can not continue on to the ready state. This notification is in place for
- * wide ports and direct attached phys. Since there are no wide ported SATA
- * devices this could become an invalid port configuration.
- */
- bool scic_sds_port_link_detected(
- struct scic_sds_port *sci_port,
- struct scic_sds_phy *sci_phy)
- {
- if ((sci_port->logical_port_index != SCIC_SDS_DUMMY_PORT) &&
- (sci_phy->protocol == SCIC_SDS_PHY_PROTOCOL_SATA) &&
- scic_sds_port_is_wide(sci_port)) {
- scic_sds_port_invalid_link_up(sci_port, sci_phy);
- return false;
- }
- return true;
- }
- /**
- * This method is the entry point for the phy to inform the port that it is now
- * in a ready state
- * @sci_port:
- *
- *
- */
- void scic_sds_port_link_up(
- struct scic_sds_port *sci_port,
- struct scic_sds_phy *sci_phy)
- {
- sci_phy->is_in_link_training = false;
- sci_port->state_handlers->link_up_handler(sci_port, sci_phy);
- }
- /**
- * This method is the entry point for the phy to inform the port that it is no
- * longer in a ready state
- * @sci_port:
- *
- *
- */
- void scic_sds_port_link_down(
- struct scic_sds_port *sci_port,
- struct scic_sds_phy *sci_phy)
- {
- sci_port->state_handlers->link_down_handler(sci_port, sci_phy);
- }
- /**
- * This method is called to start an IO request on this port.
- * @sci_port:
- * @sci_dev:
- * @sci_req:
- *
- * enum sci_status
- */
- enum sci_status scic_sds_port_start_io(
- struct scic_sds_port *sci_port,
- struct scic_sds_remote_device *sci_dev,
- struct scic_sds_request *sci_req)
- {
- return sci_port->state_handlers->start_io_handler(
- sci_port, sci_dev, sci_req);
- }
- /**
- * This method is called to complete an IO request to the port.
- * @sci_port:
- * @sci_dev:
- * @sci_req:
- *
- * enum sci_status
- */
- enum sci_status scic_sds_port_complete_io(
- struct scic_sds_port *sci_port,
- struct scic_sds_remote_device *sci_dev,
- struct scic_sds_request *sci_req)
- {
- return sci_port->state_handlers->complete_io_handler(
- sci_port, sci_dev, sci_req);
- }
- /**
- * This method is provided to timeout requests for port operations. Mostly its
- * for the port reset operation.
- *
- *
- */
- static void scic_sds_port_timeout_handler(void *port)
- {
- struct scic_sds_port *sci_port = port;
- u32 current_state;
- current_state = sci_base_state_machine_get_state(
- &sci_port->state_machine);
- if (current_state == SCI_BASE_PORT_STATE_RESETTING) {
- /*
- * if the port is still in the resetting state then the
- * timeout fired before the reset completed.
- */
- sci_base_state_machine_change_state(
- &sci_port->state_machine,
- SCI_BASE_PORT_STATE_FAILED);
- } else if (current_state == SCI_BASE_PORT_STATE_STOPPED) {
- /*
- * if the port is stopped then the start request failed
- * In this case stay in the stopped state.
- */
- dev_err(sciport_to_dev(sci_port),
- "%s: SCIC Port 0x%p failed to stop before tiemout.\n",
- __func__,
- sci_port);
- } else if (current_state == SCI_BASE_PORT_STATE_STOPPING) {
- /*
- * if the port is still stopping then the stop has not
- * completed
- */
- isci_port_stop_complete(
- scic_sds_port_get_controller(sci_port),
- sci_port,
- SCI_FAILURE_TIMEOUT);
- } else {
- /*
- * The port is in the ready state and we have a timer
- * reporting a timeout this should not happen.
- */
- dev_err(sciport_to_dev(sci_port),
- "%s: SCIC Port 0x%p is processing a timeout operation "
- "in state %d.\n",
- __func__,
- sci_port,
- current_state);
- }
- }
- /* --------------------------------------------------------------------------- */
- /**
- * This function updates the hardwares VIIT entry for this port.
- *
- *
- */
- static void scic_sds_port_update_viit_entry(struct scic_sds_port *sci_port)
- {
- struct sci_sas_address sas_address;
- scic_sds_port_get_sas_address(sci_port, &sas_address);
- writel(sas_address.high,
- &sci_port->viit_registers->initiator_sas_address_hi);
- writel(sas_address.low,
- &sci_port->viit_registers->initiator_sas_address_lo);
- /* This value get cleared just in case its not already cleared */
- writel(0, &sci_port->viit_registers->reserved);
- /* We are required to update the status register last */
- writel(SCU_VIIT_ENTRY_ID_VIIT |
- SCU_VIIT_IPPT_INITIATOR |
- ((1 << sci_port->physical_port_index) << SCU_VIIT_ENTRY_LPVIE_SHIFT) |
- SCU_VIIT_STATUS_ALL_VALID,
- &sci_port->viit_registers->status);
- }
- /**
- * This method returns the maximum allowed speed for data transfers on this
- * port. This maximum allowed speed evaluates to the maximum speed of the
- * slowest phy in the port.
- * @sci_port: This parameter specifies the port for which to retrieve the
- * maximum allowed speed.
- *
- * This method returns the maximum negotiated speed of the slowest phy in the
- * port.
- */
- enum sas_linkrate scic_sds_port_get_max_allowed_speed(
- struct scic_sds_port *sci_port)
- {
- u16 index;
- enum sas_linkrate max_allowed_speed = SAS_LINK_RATE_6_0_GBPS;
- struct scic_sds_phy *phy = NULL;
- /*
- * Loop through all of the phys in this port and find the phy with the
- * lowest maximum link rate. */
- for (index = 0; index < SCI_MAX_PHYS; index++) {
- phy = sci_port->phy_table[index];
- if (
- (phy != NULL)
- && (scic_sds_port_active_phy(sci_port, phy) == true)
- && (phy->max_negotiated_speed < max_allowed_speed)
- )
- max_allowed_speed = phy->max_negotiated_speed;
- }
- return max_allowed_speed;
- }
- static void scic_port_enable_broadcast_change_notification(struct scic_sds_port *port)
- {
- struct scic_sds_phy *phy;
- u32 register_value;
- u8 index;
- /* Loop through all of the phys to enable BCN. */
- for (index = 0; index < SCI_MAX_PHYS; index++) {
- phy = port->phy_table[index];
- if (phy != NULL) {
- register_value =
- readl(&phy->link_layer_registers->link_layer_control);
- /* clear the bit by writing 1. */
- writel(register_value,
- &phy->link_layer_registers->link_layer_control);
- }
- }
- }
- /*
- * ****************************************************************************
- * * READY SUBSTATE HANDLERS
- * **************************************************************************** */
- /*
- * This method is the general ready state stop handler for the struct scic_sds_port
- * object. This function will transition the ready substate machine to its
- * final state. enum sci_status SCI_SUCCESS
- */
- static enum sci_status scic_sds_port_ready_substate_stop_handler(
- struct scic_sds_port *port)
- {
- sci_base_state_machine_change_state(
- &port->state_machine,
- SCI_BASE_PORT_STATE_STOPPING
- );
- return SCI_SUCCESS;
- }
- /*
- * This method is the general ready substate complete io handler for the
- * struct scic_sds_port object. This function decrments the outstanding request count
- * for this port object. enum sci_status SCI_SUCCESS
- */
- static enum sci_status scic_sds_port_ready_substate_complete_io_handler(
- struct scic_sds_port *port,
- struct scic_sds_remote_device *device,
- struct scic_sds_request *io_request)
- {
- scic_sds_port_decrement_request_count(port);
- return SCI_SUCCESS;
- }
- static enum sci_status scic_sds_port_ready_substate_add_phy_handler(
- struct scic_sds_port *port,
- struct scic_sds_phy *phy)
- {
- enum sci_status status;
- status = scic_sds_port_set_phy(port, phy);
- if (status == SCI_SUCCESS) {
- scic_sds_port_general_link_up_handler(port, phy, true);
- port->not_ready_reason = SCIC_PORT_NOT_READY_RECONFIGURING;
- sci_base_state_machine_change_state(
- &port->ready_substate_machine,
- SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING
- );
- }
- return status;
- }
- static enum sci_status scic_sds_port_ready_substate_remove_phy_handler(
- struct scic_sds_port *port,
- struct scic_sds_phy *phy)
- {
- enum sci_status status;
- status = scic_sds_port_clear_phy(port, phy);
- if (status == SCI_SUCCESS) {
- scic_sds_port_deactivate_phy(port, phy, true);
- port->not_ready_reason = SCIC_PORT_NOT_READY_RECONFIGURING;
- sci_base_state_machine_change_state(
- &port->ready_substate_machine,
- SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING
- );
- }
- return status;
- }
- /*
- * ****************************************************************************
- * * READY SUBSTATE WAITING HANDLERS
- * **************************************************************************** */
- /**
- *
- * @sci_port: This is the struct scic_sds_port object that which has a phy that has
- * gone link up.
- * @sci_phy: This is the struct scic_sds_phy object that has gone link up.
- *
- * This method is the ready waiting substate link up handler for the
- * struct scic_sds_port object. This methos will report the link up condition for
- * this port and will transition to the ready operational substate. none
- */
- static void scic_sds_port_ready_waiting_substate_link_up_handler(
- struct scic_sds_port *sci_port,
- struct scic_sds_phy *sci_phy)
- {
- /*
- * Since this is the first phy going link up for the port we can just enable
- * it and continue. */
- scic_sds_port_activate_phy(sci_port, sci_phy, true);
- sci_base_state_machine_change_state(
- &sci_port->ready_substate_machine,
- SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL
- );
- }
- /*
- * This method is the ready waiting substate start io handler for the
- * struct scic_sds_port object. The port object can not accept new requests so the
- * request is failed. enum sci_status SCI_FAILURE_INVALID_STATE
- */
- static enum sci_status scic_sds_port_ready_waiting_substate_start_io_handler(
- struct scic_sds_port *port,
- struct scic_sds_remote_device *device,
- struct scic_sds_request *io_request)
- {
- return SCI_FAILURE_INVALID_STATE;
- }
- /*
- * ****************************************************************************
- * * READY SUBSTATE OPERATIONAL HANDLERS
- * **************************************************************************** */
- /*
- * This method will casue the port to reset. enum sci_status SCI_SUCCESS
- */
- static enum
- sci_status scic_sds_port_ready_operational_substate_reset_handler(
- struct scic_sds_port *port,
- u32 timeout)
- {
- enum sci_status status = SCI_FAILURE_INVALID_PHY;
- u32 phy_index;
- struct scic_sds_phy *selected_phy = NULL;
- /* Select a phy on which we can send the hard reset request. */
- for (phy_index = 0;
- (phy_index < SCI_MAX_PHYS) && (selected_phy == NULL);
- phy_index++) {
- selected_phy = port->phy_table[phy_index];
- if ((selected_phy != NULL) &&
- !scic_sds_port_active_phy(port, selected_phy)) {
- /*
- * We found a phy but it is not ready select
- * different phy
- */
- selected_phy = NULL;
- }
- }
- /* If we have a phy then go ahead and start the reset procedure */
- if (selected_phy != NULL) {
- status = scic_sds_phy_reset(selected_phy);
- if (status == SCI_SUCCESS) {
- isci_timer_start(port->timer_handle, timeout);
- port->not_ready_reason =
- SCIC_PORT_NOT_READY_HARD_RESET_REQUESTED;
- sci_base_state_machine_change_state(
- &port->state_machine,
- SCI_BASE_PORT_STATE_RESETTING);
- }
- }
- return status;
- }
- /**
- * scic_sds_port_ready_operational_substate_link_up_handler() -
- * @sci_port: This is the struct scic_sds_port object that which has a phy that has
- * gone link up.
- * @sci_phy: This is the struct scic_sds_phy object that has gone link up.
- *
- * This method is the ready operational substate link up handler for the
- * struct scic_sds_port object. This function notifies the SCI User that the phy has
- * gone link up. none
- */
- static void scic_sds_port_ready_operational_substate_link_up_handler(
- struct scic_sds_port *sci_port,
- struct scic_sds_phy *sci_phy)
- {
- scic_sds_port_general_link_up_handler(sci_port, sci_phy, true);
- }
- /**
- * scic_sds_port_ready_operational_substate_link_down_handler() -
- * @sci_port: This is the struct scic_sds_port object that which has a phy that has
- * gone link down.
- * @sci_phy: This is the struct scic_sds_phy object that has gone link down.
- *
- * This method is the ready operational substate link down handler for the
- * struct scic_sds_port object. This function notifies the SCI User that the phy has
- * gone link down and if this is the last phy in the port the port will change
- * state to the ready waiting substate. none
- */
- static void scic_sds_port_ready_operational_substate_link_down_handler(
- struct scic_sds_port *sci_port,
- struct scic_sds_phy *sci_phy)
- {
- scic_sds_port_deactivate_phy(sci_port, sci_phy, true);
- /*
- * If there are no active phys left in the port, then transition
- * the port to the WAITING state until such time as a phy goes
- * link up. */
- if (sci_port->active_phy_mask == 0)
- sci_base_state_machine_change_state(&sci_port->ready_substate_machine,
- SCIC_SDS_PORT_READY_SUBSTATE_WAITING);
- }
- /*
- * This method is the ready operational substate start io handler for the
- * struct scic_sds_port object. This function incremetns the outstanding request
- * count for this port object. enum sci_status SCI_SUCCESS
- */
- static enum sci_status scic_sds_port_ready_operational_substate_start_io_handler(
- struct scic_sds_port *port,
- struct scic_sds_remote_device *device,
- struct scic_sds_request *io_request)
- {
- port->started_request_count++;
- return SCI_SUCCESS;
- }
- /*
- * ****************************************************************************
- * * READY SUBSTATE OPERATIONAL HANDLERS
- * **************************************************************************** */
- /*
- * This is the default method for a port add phy request. It will report a
- * warning and exit. enum sci_status SCI_FAILURE_INVALID_STATE
- */
- static enum sci_status scic_sds_port_ready_configuring_substate_add_phy_handler(
- struct scic_sds_port *port,
- struct scic_sds_phy *phy)
- {
- enum sci_status status;
- status = scic_sds_port_set_phy(port, phy);
- if (status == SCI_SUCCESS) {
- scic_sds_port_general_link_up_handler(port, phy, true);
- /*
- * Re-enter the configuring state since this may be the last phy in
- * the port. */
- sci_base_state_machine_change_state(
- &port->ready_substate_machine,
- SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING
- );
- }
- return status;
- }
- /*
- * This is the default method for a port remove phy request. It will report a
- * warning and exit. enum sci_status SCI_FAILURE_INVALID_STATE
- */
- static enum sci_status scic_sds_port_ready_configuring_substate_remove_phy_handler(
- struct scic_sds_port *port,
- struct scic_sds_phy *phy)
- {
- enum sci_status status;
- status = scic_sds_port_clear_phy(port, phy);
- if (status == SCI_SUCCESS) {
- scic_sds_port_deactivate_phy(port, phy, true);
- /*
- * Re-enter the configuring state since this may be the last phy in
- * the port. */
- sci_base_state_machine_change_state(
- &port->ready_substate_machine,
- SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING
- );
- }
- return status;
- }
- /**
- * scic_sds_port_ready_configuring_substate_complete_io_handler() -
- * @port: This is the port that is being requested to complete the io request.
- * @device: This is the device on which the io is completing.
- *
- * This method will decrement the outstanding request count for this port. If
- * the request count goes to 0 then the port can be reprogrammed with its new
- * phy data.
- */
- static enum sci_status
- scic_sds_port_ready_configuring_substate_complete_io_handler(
- struct scic_sds_port *port,
- struct scic_sds_remote_device *device,
- struct scic_sds_request *io_request)
- {
- scic_sds_port_decrement_request_count(port);
- if (port->started_request_count == 0) {
- sci_base_state_machine_change_state(
- &port->ready_substate_machine,
- SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL
- );
- }
- return SCI_SUCCESS;
- }
- static enum sci_status default_port_handler(struct scic_sds_port *sci_port,
- const char *func)
- {
- dev_warn(sciport_to_dev(sci_port),
- "%s: in wrong state: %d\n", func,
- sci_base_state_machine_get_state(&sci_port->state_machine));
- return SCI_FAILURE_INVALID_STATE;
- }
- static enum sci_status
- scic_sds_port_default_start_handler(struct scic_sds_port *sci_port)
- {
- return default_port_handler(sci_port, __func__);
- }
- static enum sci_status
- scic_sds_port_default_stop_handler(struct scic_sds_port *sci_port)
- {
- return default_port_handler(sci_port, __func__);
- }
- static enum sci_status
- scic_sds_port_default_destruct_handler(struct scic_sds_port *sci_port)
- {
- return default_port_handler(sci_port, __func__);
- }
- static enum sci_status
- scic_sds_port_default_reset_handler(struct scic_sds_port *sci_port,
- u32 timeout)
- {
- return default_port_handler(sci_port, __func__);
- }
- static enum sci_status
- scic_sds_port_default_add_phy_handler(struct scic_sds_port *sci_port,
- struct scic_sds_phy *base_phy)
- {
- return default_port_handler(sci_port, __func__);
- }
- static enum sci_status
- scic_sds_port_default_remove_phy_handler(struct scic_sds_port *sci_port,
- struct scic_sds_phy *base_phy)
- {
- return default_port_handler(sci_port, __func__);
- }
- /*
- * This is the default method for a port unsolicited frame request. It will
- * report a warning and exit. enum sci_status SCI_FAILURE_INVALID_STATE Is it even
- * possible to receive an unsolicited frame directed to a port object? It
- * seems possible if we implementing virtual functions but until then?
- */
- static enum sci_status
- scic_sds_port_default_frame_handler(struct scic_sds_port *sci_port,
- u32 frame_index)
- {
- struct scic_sds_controller *scic = scic_sds_port_get_controller(sci_port);
- default_port_handler(sci_port, __func__);
- scic_sds_controller_release_frame(scic, frame_index);
- return SCI_FAILURE_INVALID_STATE;
- }
- static enum sci_status scic_sds_port_default_event_handler(struct scic_sds_port *sci_port,
- u32 event_code)
- {
- return default_port_handler(sci_port, __func__);
- }
- static void scic_sds_port_default_link_up_handler(struct scic_sds_port *sci_port,
- struct scic_sds_phy *sci_phy)
- {
- default_port_handler(sci_port, __func__);
- }
- static void scic_sds_port_default_link_down_handler(struct scic_sds_port *sci_port,
- struct scic_sds_phy *sci_phy)
- {
- default_port_handler(sci_port, __func__);
- }
- static enum sci_status scic_sds_port_default_start_io_handler(struct scic_sds_port *sci_port,
- struct scic_sds_remote_device *sci_dev,
- struct scic_sds_request *sci_req)
- {
- return default_port_handler(sci_port, __func__);
- }
- static enum sci_status scic_sds_port_default_complete_io_handler(struct scic_sds_port *sci_port,
- struct scic_sds_remote_device *sci_dev,
- struct scic_sds_request *sci_req)
- {
- return default_port_handler(sci_port, __func__);
- }
- static struct scic_sds_port_state_handler scic_sds_port_ready_substate_handler_table[] = {
- [SCIC_SDS_PORT_READY_SUBSTATE_WAITING] = {
- .start_handler = scic_sds_port_default_start_handler,
- .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] = {
- .start_handler = scic_sds_port_default_start_handler,
- .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] = {
- .start_handler = scic_sds_port_default_start_handler,
- .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
- }
- };
- /**
- * scic_sds_port_set_ready_state_handlers() -
- *
- * This macro sets the port ready substate handlers.
- */
- #define scic_sds_port_set_ready_state_handlers(port, state_id) \
- scic_sds_port_set_state_handlers(\
- port, &scic_sds_port_ready_substate_handler_table[(state_id)] \
- )
- /*
- * ******************************************************************************
- * * PORT STATE PRIVATE METHODS
- * ****************************************************************************** */
- /**
- *
- * @sci_port: This is the struct scic_sds_port object to suspend.
- *
- * This method will susped the port task scheduler for this port object. none
- */
- static void
- scic_sds_port_suspend_port_task_scheduler(struct scic_sds_port *port)
- {
- u32 pts_control_value;
- pts_control_value = readl(&port->port_task_scheduler_registers->control);
- pts_control_value |= SCU_PTSxCR_GEN_BIT(SUSPEND);
- writel(pts_control_value, &port->port_task_scheduler_registers->control);
- }
- /**
- * scic_sds_port_post_dummy_request() - post dummy/workaround request
- * @sci_port: port to post task
- *
- * Prevent the hardware scheduler from posting new requests to the front
- * of the scheduler queue causing a starvation problem for currently
- * ongoing requests.
- *
- */
- static void scic_sds_port_post_dummy_request(struct scic_sds_port *sci_port)
- {
- u32 command;
- struct scu_task_context *task_context;
- struct scic_sds_controller *scic = sci_port->owning_controller;
- u16 tci = sci_port->reserved_tci;
- task_context = scic_sds_controller_get_task_context_buffer(scic, tci);
- task_context->abort = 0;
- command = SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_TC |
- sci_port->physical_port_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT |
- tci;
- scic_sds_controller_post_request(scic, command);
- }
- /**
- * This routine will abort the dummy request. This will alow the hardware to
- * power down parts of the silicon to save power.
- *
- * @sci_port: The port on which the task must be aborted.
- *
- */
- static void scic_sds_port_abort_dummy_request(struct scic_sds_port *sci_port)
- {
- struct scic_sds_controller *scic = sci_port->owning_controller;
- u16 tci = sci_port->reserved_tci;
- struct scu_task_context *tc;
- u32 command;
- tc = scic_sds_controller_get_task_context_buffer(scic, tci);
- tc->abort = 1;
- command = SCU_CONTEXT_COMMAND_REQUEST_POST_TC_ABORT |
- sci_port->physical_port_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT |
- tci;
- scic_sds_controller_post_request(scic, command);
- }
- /**
- *
- * @sci_port: This is the struct scic_sds_port object to resume.
- *
- * This method will resume the port task scheduler for this port object. none
- */
- static void
- scic_sds_port_resume_port_task_scheduler(struct scic_sds_port *port)
- {
- u32 pts_control_value;
- pts_control_value = readl(&port->port_task_scheduler_registers->control);
- pts_control_value &= ~SCU_PTSxCR_GEN_BIT(SUSPEND);
- writel(pts_control_value, &port->port_task_scheduler_registers->control);
- }
- /*
- * ******************************************************************************
- * * PORT READY SUBSTATE METHODS
- * ****************************************************************************** */
- /**
- *
- * @object: This is the object which is cast to a struct scic_sds_port object.
- *
- * This method will perform the actions required by the struct scic_sds_port on
- * entering the SCIC_SDS_PORT_READY_SUBSTATE_WAITING. This function checks the
- * port for any ready phys. If there is at least one phy in a ready state then
- * the port transitions to the ready operational substate. none
- */
- static void scic_sds_port_ready_substate_waiting_enter(void *object)
- {
- struct scic_sds_port *sci_port = object;
- scic_sds_port_set_ready_state_handlers(
- sci_port, SCIC_SDS_PORT_READY_SUBSTATE_WAITING
- );
- scic_sds_port_suspend_port_task_scheduler(sci_port);
- sci_port->not_ready_reason = SCIC_PORT_NOT_READY_NO_ACTIVE_PHYS;
- if (sci_port->active_phy_mask != 0) {
- /* At least one of the phys on the port is ready */
- sci_base_state_machine_change_state(
- &sci_port->ready_substate_machine,
- SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL
- );
- }
- }
- /**
- *
- * @object: This is the object which is cast to a struct scic_sds_port object.
- *
- * This function will perform the actions required by the struct scic_sds_port
- * on entering the SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL. This function sets
- * the state handlers for the port object, notifies the SCI User that the port
- * is ready, and resumes port operations. none
- */
- static void scic_sds_port_ready_substate_operational_enter(void *object)
- {
- u32 index;
- struct scic_sds_port *sci_port = object;
- struct scic_sds_controller *scic = sci_port->owning_controller;
- struct isci_host *ihost = scic_to_ihost(scic);
- struct isci_port *iport = sci_port_to_iport(sci_port);
- scic_sds_port_set_ready_state_handlers(
- sci_port,
- SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL);
- isci_port_ready(ihost, iport);
- for (index = 0; index < SCI_MAX_PHYS; index++) {
- if (sci_port->phy_table[index]) {
- writel(sci_port->physical_port_index,
- &sci_port->port_pe_configuration_register[
- sci_port->phy_table[index]->phy_index]);
- }
- }
- scic_sds_port_update_viit_entry(sci_port);
- scic_sds_port_resume_port_task_scheduler(sci_port);
- /*
- * Post the dummy task for the port so the hardware can schedule
- * io correctly
- */
- scic_sds_port_post_dummy_request(sci_port);
- }
- /**
- *
- * @object: This is the object which is cast to a struct scic_sds_port object.
- *
- * This method will perform the actions required by the struct scic_sds_port on
- * exiting the SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL. This function reports
- * the port not ready and suspends the port task scheduler. none
- */
- static void scic_sds_port_ready_substate_operational_exit(void *object)
- {
- struct scic_sds_port *sci_port = object;
- struct scic_sds_controller *scic = sci_port->owning_controller;
- struct isci_host *ihost = scic_to_ihost(scic);
- struct isci_port *iport = sci_port_to_iport(sci_port);
- /*
- * Kill the dummy task for this port if it has not yet posted
- * the hardware will treat this as a NOP and just return abort
- * complete.
- */
- scic_sds_port_abort_dummy_request(sci_port);
- isci_port_not_ready(ihost, iport);
- }
- /*
- * ******************************************************************************
- * * PORT READY CONFIGURING METHODS
- * ****************************************************************************** */
- /**
- * scic_sds_port_ready_substate_configuring_enter() -
- * @object: This is the object which is cast to a struct scic_sds_port object.
- *
- * This method will perform the actions required by the struct scic_sds_port on
- * exiting the SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL. This function reports
- * the port not ready and suspends the port task scheduler. none
- */
- static void scic_sds_port_ready_substate_configuring_enter(void *object)
- {
- struct scic_sds_port *sci_port = object;
- struct scic_sds_controller *scic = sci_port->owning_controller;
- struct isci_host *ihost = scic_to_ihost(scic);
- struct isci_port *iport = sci_port_to_iport(sci_port);
- scic_sds_port_set_ready_state_handlers(
- sci_port,
- SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING);
- if (sci_port->active_phy_mask == 0) {
- isci_port_not_ready(ihost, iport);
- sci_base_state_machine_change_state(
- &sci_port->ready_substate_machine,
- SCIC_SDS_PORT_READY_SUBSTATE_WAITING);
- } else if (sci_port->started_request_count == 0)
- sci_base_state_machine_change_state(
- &sci_port->ready_substate_machine,
- SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL);
- }
- static void scic_sds_port_ready_substate_configuring_exit(void *object)
- {
- struct scic_sds_port *sci_port = object;
- scic_sds_port_suspend_port_task_scheduler(sci_port);
- }
- /* --------------------------------------------------------------------------- */
- static const struct sci_base_state scic_sds_port_ready_substate_table[] = {
- [SCIC_SDS_PORT_READY_SUBSTATE_WAITING] = {
- .enter_state = scic_sds_port_ready_substate_waiting_enter,
- },
- [SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL] = {
- .enter_state = scic_sds_port_ready_substate_operational_enter,
- .exit_state = scic_sds_port_ready_substate_operational_exit
- },
- [SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING] = {
- .enter_state = scic_sds_port_ready_substate_configuring_enter,
- .exit_state = scic_sds_port_ready_substate_configuring_exit
- },
- };
- /**
- *
- * @port: This is the struct scic_sds_port object on which the io request count will
- * be decremented.
- * @device: This is the struct scic_sds_remote_device object to which the io request
- * is being directed. This parameter is not required to complete this
- * operation.
- * @io_request: This is the request that is being completed on this port
- * object. This parameter is not required to complete this operation.
- *
- * This is a general complete io request handler for the struct scic_sds_port object.
- * enum sci_status SCI_SUCCESS
- */
- static enum sci_status scic_sds_port_general_complete_io_handler(
- struct scic_sds_port *port,
- struct scic_sds_remote_device *device,
- struct scic_sds_request *io_request)
- {
- scic_sds_port_decrement_request_count(port);
- return SCI_SUCCESS;
- }
- /**
- * scic_sds_port_stopped_state_start_handler() - stop a port from "started"
- *
- * @port: This is the struct scic_sds_port object which is cast into a
- * struct scic_sds_port object.
- *
- * This function takes the struct scic_sds_port from a stopped state and
- * attempts to start it. To start a port it must have no assiged devices and
- * it must have at least one phy assigned to it. If those conditions are
- * met then the port can transition to the ready state.
- * enum sci_status
- * SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION
- * This struct scic_sds_port object could not be started because the port
- * configuration is not valid.
- * SCI_SUCCESS
- * the start request is successful and the struct scic_sds_port object
- * has transitioned to the SCI_BASE_PORT_STATE_READY.
- */
- static enum sci_status
- scic_sds_port_stopped_state_start_handler(struct scic_sds_port *sci_port)
- {
- struct scic_sds_controller *scic = sci_port->owning_controller;
- struct isci_host *ihost = scic_to_ihost(scic);
- enum sci_status status = SCI_SUCCESS;
- u32 phy_mask;
- if (sci_port->assigned_device_count > 0) {
- /*
- * @todo This is a start failure operation because
- * there are still devices assigned to this port.
- * There must be no devices assigned to a port on a
- * start operation.
- */
- return SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION;
- }
- sci_port->timer_handle =
- isci_timer_create(ihost,
- sci_port,
- scic_sds_port_timeout_handler);
- if (!sci_port->timer_handle)
- return SCI_FAILURE_INSUFFICIENT_RESOURCES;
- if (sci_port->reserved_rni == SCU_DUMMY_INDEX) {
- u16 rni = scic_sds_remote_node_table_allocate_remote_node(
- &scic->available_remote_nodes, 1);
- if (rni != SCU_DUMMY_INDEX)
- scic_sds_port_construct_dummy_rnc(sci_port, rni);
- else
- status = SCI_FAILURE_INSUFFICIENT_RESOURCES;
- sci_port->reserved_rni = rni;
- }
- if (sci_port->reserved_tci == SCU_DUMMY_INDEX) {
- /* Allocate a TCI and remove the sequence nibble */
- u16 tci = scic_controller_allocate_io_tag(scic);
- if (tci != SCU_DUMMY_INDEX)
- scic_sds_port_construct_dummy_task(sci_port, tci);
- else
- status = SCI_FAILURE_INSUFFICIENT_RESOURCES;
- sci_port->reserved_tci = tci;
- }
- if (status == SCI_SUCCESS) {
- phy_mask = scic_sds_port_get_phys(sci_port);
- /*
- * There are one or more phys assigned to this port. Make sure
- * the port's phy mask is in fact legal and supported by the
- * silicon.
- */
- if (scic_sds_port_is_phy_mask_valid(sci_port, phy_mask) == true) {
- sci_base_state_machine_change_state(
- &sci_port->state_machine,
- SCI_BASE_PORT_STATE_READY);
- return SCI_SUCCESS;
- } else
- status = SCI_FAILURE;
- }
- if (status != SCI_SUCCESS)
- scic_sds_port_destroy_dummy_resources(sci_port);
- return status;
- }
- /*
- * This method takes the struct scic_sds_port that is in a stopped state and handles a
- * stop request. This function takes no action. enum sci_status SCI_SUCCESS the
- * stop request is successful as the struct scic_sds_port object is already stopped.
- */
- static enum sci_status scic_sds_port_stopped_state_stop_handler(
- struct scic_sds_port *port)
- {
- /* We are already stopped so there is nothing to do here */
- return SCI_SUCCESS;
- }
- /*
- * This method takes the struct scic_sds_port that is in a stopped state and handles
- * the destruct request. The stopped state is the only state in which the
- * struct scic_sds_port can be destroyed. This function causes the port object to
- * transition to the SCI_BASE_PORT_STATE_FINAL. enum sci_status SCI_SUCCESS
- */
- static enum sci_status scic_sds_port_stopped_state_destruct_handler(
- struct scic_sds_port *port)
- {
- sci_base_state_machine_stop(&port->state_machine);
- return SCI_SUCCESS;
- }
- /*
- * This method takes the struct scic_sds_port that is in a stopped state and handles
- * the add phy request. In MPC mode the only time a phy can be added to a port
- * is in the SCI_BASE_PORT_STATE_STOPPED. enum sci_status
- * SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION is returned when the phy can not
- * be added to the port. SCI_SUCCESS if the phy is added to the port.
- */
- static enum sci_status scic_sds_port_stopped_state_add_phy_handler(
- struct scic_sds_port *port,
- struct scic_sds_phy *phy)
- {
- struct sci_sas_address port_sas_address;
- /* Read the port assigned SAS Address if there is one */
- scic_sds_port_get_sas_address(port, &port_sas_address);
- if (port_sas_address.high != 0 && port_sas_address.low != 0) {
- struct sci_sas_address phy_sas_address;
- /*
- * Make sure that the PHY SAS Address matches the SAS Address
- * for this port. */
- scic_sds_phy_get_sas_address(phy, &phy_sas_address);
- if (
- (port_sas_address.high != phy_sas_address.high)
- || (port_sas_address.low != phy_sas_address.low)
- ) {
- return SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION;
- }
- }
- return scic_sds_port_set_phy(port, phy);
- }
- /*
- * This method takes the struct scic_sds_port that is in a stopped state and handles
- * the remove phy request. In MPC mode the only time a phy can be removed from
- * a port is in the SCI_BASE_PORT_STATE_STOPPED. enum sci_status
- * SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION is returned when the phy can not
- * be added to the port. SCI_SUCCESS if the phy is added to the port.
- */
- static enum sci_status scic_sds_port_stopped_state_remove_phy_handler(
- struct scic_sds_port *port,
- struct scic_sds_phy *phy)
- {
- return scic_sds_port_clear_phy(port, phy);
- }
- /*
- * ****************************************************************************
- * * READY STATE HANDLERS
- * **************************************************************************** */
- /*
- * ****************************************************************************
- * * RESETTING STATE HANDLERS
- * **************************************************************************** */
- /*
- * ****************************************************************************
- * * STOPPING STATE HANDLERS
- * **************************************************************************** */
- /*
- * This method takes the struct scic_sds_port that is in a stopping state and handles
- * the complete io request. Should the request count reach 0 then the port
- * object will transition to the stopped state. enum sci_status SCI_SUCCESS
- */
- static enum sci_status scic_sds_port_stopping_state_complete_io_handler(
- struct scic_sds_port *sci_port,
- struct scic_sds_remote_device *device,
- struct scic_sds_request *io_request)
- {
- scic_sds_port_decrement_request_count(sci_port);
- if (sci_port->started_request_count == 0) {
- sci_base_state_machine_change_state(&sci_port->state_machine,
- SCI_BASE_PORT_STATE_STOPPED);
- }
- return SCI_SUCCESS;
- }
- /*
- * ****************************************************************************
- * * RESETTING STATE HANDLERS
- * **************************************************************************** */
- /**
- *
- * @port: This is the port object which is being requested to stop.
- *
- * This method will stop a failed port. This causes a transition to the
- * stopping state. enum sci_status SCI_SUCCESS
- */
- static enum sci_status scic_sds_port_reset_state_stop_handler(
- struct scic_sds_port *port)
- {
- sci_base_state_machine_change_state(
- &port->state_machine,
- SCI_BASE_PORT_STATE_STOPPING
- );
- return SCI_SUCCESS;
- }
- /*
- * This method will transition a failed port to its ready state. The port
- * failed because a hard reset request timed out but at some time later one or
- * more phys in the port became ready. enum sci_status SCI_SUCCESS
- */
- static void scic_sds_port_reset_state_link_up_handler(
- struct scic_sds_port *port,
- struct scic_sds_phy *phy)
- {
- /*
- * / @todo We should make sure that the phy that has gone link up is the same
- * / one on which we sent the reset. It is possible that the phy on
- * / which we sent the reset is not the one that has gone link up and we
- * / want to make sure that phy being reset comes back. Consider the
- * / case where a reset is sent but before the hardware processes the
- * / reset it get a link up on the port because of a hot plug event.
- * / because of the reset request this phy will go link down almost
- * / immediately. */
- /*
- * In the resetting state we don't notify the user regarding
- * link up and link down notifications. */
- scic_sds_port_general_link_up_handler(port, phy, false);
- }
- /*
- * This method process link down notifications that occur during a port reset
- * operation. Link downs can occur during the reset operation. enum sci_status
- * SCI_SUCCESS
- */
- static void scic_sds_port_reset_state_link_down_handler(
- struct scic_sds_port *port,
- struct scic_sds_phy *phy)
- {
- /*
- * In the resetting state we don't notify the user regarding
- * link up and link down notifications. */
- scic_sds_port_deactivate_phy(port, phy, false);
- }
- static struct scic_sds_port_state_handler scic_sds_port_state_handler_table[] = {
- [SCI_BASE_PORT_STATE_STOPPED] = {
- .start_handler = scic_sds_port_stopped_state_start_handler,
- .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] = {
- .start_handler = scic_sds_port_default_start_handler,
- .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] = {
- .start_handler = scic_sds_port_default_start_handler,
- .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
- },
- [SCI_BASE_PORT_STATE_RESETTING] = {
- .start_handler = scic_sds_port_default_start_handler,
- .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] = {
- .start_handler = scic_sds_port_default_start_handler,
- .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);
- }
- static void scic_sds_port_invalidate_dummy_remote_node(struct scic_sds_port *sci_port)
- {
- struct scic_sds_controller *scic = sci_port->owning_controller;
- u8 phys_index = sci_port->physical_port_index;
- union scu_remote_node_context *rnc;
- u16 rni = sci_port->reserved_rni;
- u32 command;
- rnc = &scic->remote_node_context_table[rni];
- rnc->ssp.is_valid = false;
- /* ensure the preceding tc abort request has reached the
- * controller and give it ample time to act before posting the rnc
- * invalidate
- */
- readl(&scic->smu_registers->interrupt_status); /* flush */
- udelay(10);
- command = SCU_CONTEXT_COMMAND_POST_RNC_INVALIDATE |
- phys_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT | rni;
- scic_sds_controller_post_request(scic, command);
- }
- /*
- * ******************************************************************************
- * * PORT STATE METHODS
- * ****************************************************************************** */
- /**
- *
- * @object: This is the object which is cast to a struct scic_sds_port object.
- *
- * This method will perform the actions required by the struct scic_sds_port on
- * entering the SCI_BASE_PORT_STATE_STOPPED. This function sets the stopped
- * state handlers for the struct scic_sds_port object and disables the port task
- * scheduler in the hardware. none
- */
- static void scic_sds_port_stopped_state_enter(void *object)
- {
- struct scic_sds_port *sci_port = object;
- scic_sds_port_set_base_state_handlers(
- sci_port, SCI_BASE_PORT_STATE_STOPPED
- );
- if (
- SCI_BASE_PORT_STATE_STOPPING
- == sci_port->state_machine.previous_state_id
- ) {
- /*
- * If we enter this state becasuse of a request to stop
- * the port then we want to disable the hardwares port
- * task scheduler. */
- scic_sds_port_disable_port_task_scheduler(sci_port);
- }
- }
- /**
- *
- * @object: This is the object which is cast to a struct scic_sds_port object.
- *
- * This method will perform the actions required by the struct scic_sds_port on
- * exiting the SCI_BASE_STATE_STOPPED. This function enables the SCU hardware
- * port task scheduler. none
- */
- static void scic_sds_port_stopped_state_exit(void *object)
- {
- struct scic_sds_port *sci_port = object;
- /* Enable and suspend the port task scheduler */
- scic_sds_port_enable_port_task_scheduler(sci_port);
- }
- /**
- * scic_sds_port_ready_state_enter -
- * @object: This is the object which is cast to a struct scic_sds_port object.
- *
- * This method will perform the actions required by the struct scic_sds_port on
- * entering the SCI_BASE_PORT_STATE_READY. This function sets the ready state
- * handlers for the struct scic_sds_port object, reports the port object as
- * not ready and starts the ready substate machine. none
- */
- static void scic_sds_port_ready_state_enter(void *object)
- {
- struct scic_sds_port *sci_port = object;
- struct scic_sds_controller *scic = sci_port->owning_controller;
- struct isci_host *ihost = scic_to_ihost(scic);
- struct isci_port *iport = sci_port_to_iport(sci_port);
- u32 prev_state;
- /* Put the ready state handlers in place though they will not be there long */
- scic_sds_port_set_base_state_handlers(sci_port, SCI_BASE_PORT_STATE_READY);
- prev_state = sci_port->state_machine.previous_state_id;
- if (prev_state == SCI_BASE_PORT_STATE_RESETTING)
- isci_port_hard_reset_complete(iport, SCI_SUCCESS);
- else
- isci_port_not_ready(ihost, iport);
- /* Post and suspend the dummy remote node context for this port. */
- scic_sds_port_post_dummy_remote_node(sci_port);
- /* Start the ready substate machine */
- sci_base_state_machine_start(&sci_port->ready_substate_machine);
- }
- static void scic_sds_port_ready_state_exit(void *object)
- {
- struct scic_sds_port *sci_port = object;
- sci_base_state_machine_stop(&sci_port->ready_substate_machine);
- scic_sds_port_invalidate_dummy_remote_node(sci_port);
- }
- /**
- *
- * @object: This is the object which is cast to a struct scic_sds_port object.
- *
- * This method will perform the actions required by the struct scic_sds_port on
- * entering the SCI_BASE_PORT_STATE_RESETTING. This function sets the resetting
- * state handlers for the struct scic_sds_port object. none
- */
- static void scic_sds_port_resetting_state_enter(void *object)
- {
- struct scic_sds_port *sci_port = object;
- scic_sds_port_set_base_state_handlers(
- sci_port, SCI_BASE_PORT_STATE_RESETTING
- );
- }
- /**
- *
- * @object: This is the object which is cast to a struct scic_sds_port object.
- *
- * This function will perform the actions required by the
- * struct scic_sds_port on
- * exiting the SCI_BASE_STATE_RESETTING. This function does nothing. none
- */
- static inline void scic_sds_port_resetting_state_exit(void *object)
- {
- struct scic_sds_port *sci_port = object;
- isci_timer_stop(sci_port->timer_handle);
- }
- /**
- *
- * @object: This is the void object which is cast to a
- * struct scic_sds_port object.
- *
- * This method will perform the actions required by the struct scic_sds_port on
- * entering the SCI_BASE_PORT_STATE_STOPPING. This function sets the stopping
- * state handlers for the struct scic_sds_port object. none
- */
- static void scic_sds_port_stopping_state_enter(void *object)
- {
- struct scic_sds_port *sci_port = object;
- scic_sds_port_set_base_state_handlers(
- sci_port, SCI_BASE_PORT_STATE_STOPPING
- );
- }
- /**
- *
- * @object: This is the object which is cast to a struct scic_sds_port object.
- *
- * This function will perform the actions required by the
- * struct scic_sds_port on
- * exiting the SCI_BASE_STATE_STOPPING. This function does nothing. none
- */
- static inline void
- scic_sds_port_stopping_state_exit(void *object)
- {
- struct scic_sds_port *sci_port = object;
- isci_timer_stop(sci_port->timer_handle);
- scic_sds_port_destroy_dummy_resources(sci_port);
- }
- /**
- *
- * @object: This is the object which is cast to a struct scic_sds_port object.
- *
- * This function will perform the actions required by the
- * struct scic_sds_port on
- * entering the SCI_BASE_PORT_STATE_STOPPING. This function sets the stopping
- * state handlers for the struct scic_sds_port object. none
- */
- static void scic_sds_port_failed_state_enter(void *object)
- {
- struct scic_sds_port *sci_port = object;
- struct isci_port *iport = sci_port_to_iport(sci_port);
- scic_sds_port_set_base_state_handlers(sci_port,
- SCI_BASE_PORT_STATE_FAILED);
- isci_port_hard_reset_complete(iport, SCI_FAILURE_TIMEOUT);
- }
- /* --------------------------------------------------------------------------- */
- static const struct sci_base_state scic_sds_port_state_table[] = {
- [SCI_BASE_PORT_STATE_STOPPED] = {
- .enter_state = scic_sds_port_stopped_state_enter,
- .exit_state = scic_sds_port_stopped_state_exit
- },
- [SCI_BASE_PORT_STATE_STOPPING] = {
- .enter_state = scic_sds_port_stopping_state_enter,
- .exit_state = scic_sds_port_stopping_state_exit
- },
- [SCI_BASE_PORT_STATE_READY] = {
- .enter_state = scic_sds_port_ready_state_enter,
- .exit_state = scic_sds_port_ready_state_exit
- },
- [SCI_BASE_PORT_STATE_RESETTING] = {
- .enter_state = scic_sds_port_resetting_state_enter,
- .exit_state = scic_sds_port_resetting_state_exit
- },
- [SCI_BASE_PORT_STATE_FAILED] = {
- .enter_state = scic_sds_port_failed_state_enter,
- }
- };
- void scic_sds_port_construct(struct scic_sds_port *sci_port, u8 index,
- struct scic_sds_controller *scic)
- {
- sci_base_state_machine_construct(&sci_port->state_machine,
- sci_port,
- scic_sds_port_state_table,
- SCI_BASE_PORT_STATE_STOPPED);
- sci_base_state_machine_start(&sci_port->state_machine);
- sci_base_state_machine_construct(&sci_port->ready_substate_machine,
- sci_port,
- scic_sds_port_ready_substate_table,
- SCIC_SDS_PORT_READY_SUBSTATE_WAITING);
- sci_port->logical_port_index = SCIC_SDS_DUMMY_PORT;
- sci_port->physical_port_index = index;
- sci_port->active_phy_mask = 0;
- sci_port->owning_controller = scic;
- sci_port->started_request_count = 0;
- sci_port->assigned_device_count = 0;
- sci_port->reserved_rni = SCU_DUMMY_INDEX;
- sci_port->reserved_tci = SCU_DUMMY_INDEX;
- sci_port->timer_handle = NULL;
- sci_port->port_task_scheduler_registers = NULL;
- for (index = 0; index < SCI_MAX_PHYS; index++)
- sci_port->phy_table[index] = NULL;
- }
- void isci_port_init(struct isci_port *iport, struct isci_host *ihost, int index)
- {
- INIT_LIST_HEAD(&iport->remote_dev_list);
- INIT_LIST_HEAD(&iport->domain_dev_list);
- spin_lock_init(&iport->state_lock);
- init_completion(&iport->start_complete);
- iport->isci_host = ihost;
- isci_port_change_state(iport, isci_freed);
- }
- /**
- * isci_port_get_state() - This function gets the status of the port object.
- * @isci_port: This parameter points to the isci_port object
- *
- * status of the object as a isci_status enum.
- */
- enum isci_status isci_port_get_state(
- struct isci_port *isci_port)
- {
- return isci_port->status;
- }
- static void isci_port_bc_change_received(struct isci_host *ihost,
- struct scic_sds_port *sci_port,
- struct scic_sds_phy *sci_phy)
- {
- struct isci_phy *iphy = sci_phy_to_iphy(sci_phy);
- dev_dbg(&ihost->pdev->dev, "%s: iphy = %p, sas_phy = %p\n",
- __func__, iphy, &iphy->sas_phy);
- ihost->sas_ha.notify_port_event(&iphy->sas_phy, PORTE_BROADCAST_RCVD);
- scic_port_enable_broadcast_change_notification(sci_port);
- }
- void scic_sds_port_broadcast_change_received(
- struct scic_sds_port *sci_port,
- struct scic_sds_phy *sci_phy)
- {
- struct scic_sds_controller *scic = sci_port->owning_controller;
- struct isci_host *ihost = scic_to_ihost(scic);
- /* notify the user. */
- isci_port_bc_change_received(ihost, sci_port, sci_phy);
- }
- int isci_port_perform_hard_reset(struct isci_host *ihost, struct isci_port *iport,
- struct isci_phy *iphy)
- {
- 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);
- }
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