Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6

Conflicts:
	net/bluetooth/l2cap_core.c

1 files changed, 1757 insertions, 0 deletions

diff --git a/drivers/scsi/isci/port.c b/drivers/scsi/isci/port.c
new file mode 100644
index 000000000000..8f6f9b77e41a
--- /dev/null
+++ b/drivers/scsi/isci/port.c
@@ -0,0 +1,1757 @@
+/*
+ * This file is provided under a dual BSD/GPLv2 license.  When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+ * The full GNU General Public License is included in this distribution
+ * in the file called LICENSE.GPL.
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ *   * Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ *   * Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in
+ *     the documentation and/or other materials provided with the
+ *     distribution.
+ *   * Neither the name of Intel Corporation nor the names of its
+ *     contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "isci.h"
+#include "port.h"
+#include "request.h"
+
+#define SCIC_SDS_PORT_HARD_RESET_TIMEOUT  (1000)
+#define SCU_DUMMY_INDEX    (0xFFFF)
+
+static void isci_port_change_state(struct isci_port *iport, enum isci_status status)
+{
+        unsigned long flags;
+
+        dev_dbg(&iport->isci_host->pdev->dev,
+                "%s: iport = %p, state = 0x%x\n",
+                __func__, iport, status);
+
+        /* XXX pointless lock */
+        spin_lock_irqsave(&iport->state_lock, flags);
+        iport->status = status;
+        spin_unlock_irqrestore(&iport->state_lock, flags);
+}
+
+static void sci_port_get_protocols(struct isci_port *iport, struct sci_phy_proto *proto)
+{
+        u8 index;
+
+        proto->all = 0;
+        for (index = 0; index < SCI_MAX_PHYS; index++) {
+                struct isci_phy *iphy = iport->phy_table[index];
+
+                if (!iphy)
+                        continue;
+                sci_phy_get_protocols(iphy, proto);
+        }
+}
+
+static u32 sci_port_get_phys(struct isci_port *iport)
+{
+        u32 index;
+        u32 mask;
+
+        mask = 0;
+        for (index = 0; index < SCI_MAX_PHYS; index++)
+                if (iport->phy_table[index])
+                        mask |= (1 << index);
+
+        return mask;
+}
+
+/**
+ * sci_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 sci_port_get_properties(struct isci_port *iport,
+                                                struct sci_port_properties *prop)
+{
+        if (!iport || iport->logical_port_index == SCIC_SDS_DUMMY_PORT)
+                return SCI_FAILURE_INVALID_PORT;
+
+        prop->index = iport->logical_port_index;
+        prop->phy_mask = sci_port_get_phys(iport);
+        sci_port_get_sas_address(iport, &prop->local.sas_address);
+        sci_port_get_protocols(iport, &prop->local.protocols);
+        sci_port_get_attached_sas_address(iport, &prop->remote.sas_address);
+
+        return SCI_SUCCESS;
+}
+
+static void sci_port_bcn_enable(struct isci_port *iport)
+{
+        struct isci_phy *iphy;
+        u32 val;
+        int i;
+
+        for (i = 0; i < ARRAY_SIZE(iport->phy_table); i++) {
+                iphy = iport->phy_table[i];
+                if (!iphy)
+                        continue;
+                val = readl(&iphy->link_layer_registers->link_layer_control);
+                /* clear the bit by writing 1. */
+                writel(val, &iphy->link_layer_registers->link_layer_control);
+        }
+}
+
+/* called under sci_lock to stabilize phy:port associations */
+void isci_port_bcn_enable(struct isci_host *ihost, struct isci_port *iport)
+{
+        int i;
+
+        clear_bit(IPORT_BCN_BLOCKED, &iport->flags);
+        wake_up(&ihost->eventq);
+
+        if (!test_and_clear_bit(IPORT_BCN_PENDING, &iport->flags))
+                return;
+
+        for (i = 0; i < ARRAY_SIZE(iport->phy_table); i++) {
+                struct isci_phy *iphy = iport->phy_table[i];
+
+                if (!iphy)
+                        continue;
+
+                ihost->sas_ha.notify_port_event(&iphy->sas_phy,
+                                                PORTE_BROADCAST_RCVD);
+                break;
+        }
+}
+
+static void isci_port_bc_change_received(struct isci_host *ihost,
+                                         struct isci_port *iport,
+                                         struct isci_phy *iphy)
+{
+        if (iport && test_bit(IPORT_BCN_BLOCKED, &iport->flags)) {
+                dev_dbg(&ihost->pdev->dev,
+                        "%s: disabled BCN; isci_phy = %p, sas_phy = %p\n",
+                        __func__, iphy, &iphy->sas_phy);
+                set_bit(IPORT_BCN_PENDING, &iport->flags);
+                atomic_inc(&iport->event);
+                wake_up(&ihost->eventq);
+        } else {
+                dev_dbg(&ihost->pdev->dev,
+                        "%s: isci_phy = %p, sas_phy = %p\n",
+                        __func__, iphy, &iphy->sas_phy);
+
+                ihost->sas_ha.notify_port_event(&iphy->sas_phy,
+                                                PORTE_BROADCAST_RCVD);
+        }
+        sci_port_bcn_enable(iport);
+}
+
+static void isci_port_link_up(struct isci_host *isci_host,
+                              struct isci_port *iport,
+                              struct isci_phy *iphy)
+{
+        unsigned long flags;
+        struct sci_port_properties properties;
+        unsigned long success = true;
+
+        BUG_ON(iphy->isci_port != NULL);
+
+        iphy->isci_port = iport;
+
+        dev_dbg(&isci_host->pdev->dev,
+                "%s: isci_port = %p\n",
+                __func__, iport);
+
+        spin_lock_irqsave(&iphy->sas_phy.frame_rcvd_lock, flags);
+
+        isci_port_change_state(iphy->isci_port, isci_starting);
+
+        sci_port_get_properties(iport, &properties);
+
+        if (iphy->protocol == SCIC_SDS_PHY_PROTOCOL_SATA) {
+                u64 attached_sas_address;
+
+                iphy->sas_phy.oob_mode = SATA_OOB_MODE;
+                iphy->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 sci_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(&iphy->sas_phy.attached_sas_addr,
+                       &attached_sas_address, sizeof(attached_sas_address));
+        } else if (iphy->protocol == SCIC_SDS_PHY_PROTOCOL_SAS) {
+                iphy->sas_phy.oob_mode = SAS_OOB_MODE;
+                iphy->sas_phy.frame_rcvd_size = sizeof(struct sas_identify_frame);
+
+                /* Copy the attached SAS address from the IAF */
+                memcpy(iphy->sas_phy.attached_sas_addr,
+                       iphy->frame_rcvd.iaf.sas_addr, SAS_ADDR_SIZE);
+        } else {
+                dev_err(&isci_host->pdev->dev, "%s: unkown target\n", __func__);
+                success = false;
+        }
+
+        iphy->sas_phy.phy->negotiated_linkrate = sci_phy_linkrate(iphy);
+
+        spin_unlock_irqrestore(&iphy->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(&iphy->sas_phy,
+                                                    PORTE_BYTES_DMAED);
+}
+
+
+/**
+ * isci_port_link_down() - This function is called by the sci core when a link
+ *    becomes inactive.
+ * @isci_host: This parameter specifies the isci host object.
+ * @phy: This parameter specifies the isci phy with the active link.
+ * @port: This parameter specifies the isci port with the active link.
+ *
+ */
+static void isci_port_link_down(struct isci_host *isci_host,
+                                struct isci_phy *isci_phy,
+                                struct isci_port *isci_port)
+{
+        struct isci_remote_device *isci_device;
+
+        dev_dbg(&isci_host->pdev->dev,
+                "%s: isci_port = %p\n", __func__, isci_port);
+
+        if (isci_port) {
+
+                /* check to see if this is the last phy on this port. */
+                if (isci_phy->sas_phy.port &&
+                    isci_phy->sas_phy.port->num_phys == 1) {
+                        atomic_inc(&isci_port->event);
+                        isci_port_bcn_enable(isci_host, isci_port);
+
+                        /* change the state for all devices on this port.  The
+                         * next task sent to this device will be returned as
+                         * SAS_TASK_UNDELIVERED, and the scsi mid layer will
+                         * remove the target
+                         */
+                        list_for_each_entry(isci_device,
+                                            &isci_port->remote_dev_list,
+                                            node) {
+                                dev_dbg(&isci_host->pdev->dev,
+                                        "%s: isci_device = %p\n",
+                                        __func__, isci_device);
+                                set_bit(IDEV_GONE, &isci_device->flags);
+                        }
+                }
+                isci_port_change_state(isci_port, isci_stopping);
+        }
+
+        /* Notify libsas of the borken link, this will trigger calls to our
+         * isci_port_deformed and isci_dev_gone functions.
+         */
+        sas_phy_disconnected(&isci_phy->sas_phy);
+        isci_host->sas_ha.notify_phy_event(&isci_phy->sas_phy,
+                                           PHYE_LOSS_OF_SIGNAL);
+
+        isci_phy->isci_port = NULL;
+
+        dev_dbg(&isci_host->pdev->dev,
+                "%s: isci_port = %p - Done\n", __func__, isci_port);
+}
+
+
+/**
+ * isci_port_ready() - This function is called by the sci core when a link
+ *    becomes ready.
+ * @isci_host: This parameter specifies the isci host object.
+ * @port: This parameter specifies the sci port with the active link.
+ *
+ */
+static void isci_port_ready(struct isci_host *isci_host, struct isci_port *isci_port)
+{
+        dev_dbg(&isci_host->pdev->dev,
+                "%s: isci_port = %p\n", __func__, isci_port);
+
+        complete_all(&isci_port->start_complete);
+        isci_port_change_state(isci_port, isci_ready);
+        return;
+}
+
+/**
+ * isci_port_not_ready() - This function is called by the sci core when a link
+ *    is not ready. All remote devices on this link will be removed if they are
+ *    in the stopping state.
+ * @isci_host: This parameter specifies the isci host object.
+ * @port: This parameter specifies the sci port with the active link.
+ *
+ */
+static void isci_port_not_ready(struct isci_host *isci_host, struct isci_port *isci_port)
+{
+        dev_dbg(&isci_host->pdev->dev,
+                "%s: isci_port = %p\n", __func__, isci_port);
+}
+
+static void isci_port_stop_complete(struct isci_host *ihost,
+                                    struct isci_port *iport,
+                                    enum sci_status completion_status)
+{
+        dev_dbg(&ihost->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
+ * sci_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 sci_port_is_valid_phy_assignment(struct isci_port *iport, u32 phy_index)
+{
+        struct isci_host *ihost = iport->owning_controller;
+        struct sci_user_parameters *user = &ihost->user_parameters;
+
+        /* Initialize to invalid value. */
+        u32 existing_phy_index = SCI_MAX_PHYS;
+        u32 index;
+
+        if ((iport->physical_port_index == 1) && (phy_index != 1))
+                return false;
+
+        if (iport->physical_port_index == 3 && phy_index != 3)
+                return false;
+
+        if (iport->physical_port_index == 2 &&
+            (phy_index == 0 || phy_index == 1))
+                return false;
+
+        for (index = 0; index < SCI_MAX_PHYS; index++)
+                if (iport->phy_table[index] && 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 &&
+            user->phys[phy_index].max_speed_generation !=
+            user->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 sci_port_is_phy_mask_valid(
+        struct isci_port *iport,
+        u32 phy_mask)
+{
+        if (iport->physical_port_index == 0) {
+                if (((phy_mask & 0x0F) == 0x0F)
+                    || ((phy_mask & 0x03) == 0x03)
+                    || ((phy_mask & 0x01) == 0x01)
+                    || (phy_mask == 0))
+                        return true;
+        } else if (iport->physical_port_index == 1) {
+                if (((phy_mask & 0x02) == 0x02)
+                    || (phy_mask == 0))
+                        return true;
+        } else if (iport->physical_port_index == 2) {
+                if (((phy_mask & 0x0C) == 0x0C)
+                    || ((phy_mask & 0x04) == 0x04)
+                    || (phy_mask == 0))
+                        return true;
+        } else if (iport->physical_port_index == 3) {
+                if (((phy_mask & 0x08) == 0x08)
+                    || (phy_mask == 0))
+                        return true;
+        }
+
+        return false;
+}
+
+/*
+ * 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 sci_phy
+ * object that is active in the port.
+ */
+static struct isci_phy *sci_port_get_a_connected_phy(struct isci_port *iport)
+{
+        u32 index;
+        struct isci_phy *iphy;
+
+        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.
+                 */
+                iphy = iport->phy_table[index];
+                if (iphy && sci_port_active_phy(iport, iphy))
+                        return iphy;
+        }
+
+        return NULL;
+}
+
+static enum sci_status sci_port_set_phy(struct isci_port *iport, struct isci_phy *iphy)
+{
+        /* 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 (!iport->phy_table[iphy->phy_index] &&
+            !phy_get_non_dummy_port(iphy) &&
+            sci_port_is_valid_phy_assignment(iport, iphy->phy_index)) {
+                /* Phy is being added in the stopped state so we are in MPC mode
+                 * make logical port index = physical port index
+                 */
+                iport->logical_port_index = iport->physical_port_index;
+                iport->phy_table[iphy->phy_index] = iphy;
+                sci_phy_set_port(iphy, iport);
+
+                return SCI_SUCCESS;
+        }
+
+        return SCI_FAILURE;
+}
+
+static enum sci_status sci_port_clear_phy(struct isci_port *iport, struct isci_phy *iphy)
+{
+        /* Make sure that this phy is part of this port */
+        if (iport->phy_table[iphy->phy_index] == iphy &&
+            phy_get_non_dummy_port(iphy) == iport) {
+                struct isci_host *ihost = iport->owning_controller;
+
+                /* Yep it is assigned to this port so remove it */
+                sci_phy_set_port(iphy, &ihost->ports[SCI_MAX_PORTS]);
+                iport->phy_table[iphy->phy_index] = NULL;
+                return SCI_SUCCESS;
+        }
+
+        return SCI_FAILURE;
+}
+
+void sci_port_get_sas_address(struct isci_port *iport, struct sci_sas_address *sas)
+{
+        u32 index;
+
+        sas->high = 0;
+        sas->low  = 0;
+        for (index = 0; index < SCI_MAX_PHYS; index++)
+                if (iport->phy_table[index])
+                        sci_phy_get_sas_address(iport->phy_table[index], sas);
+}
+
+void sci_port_get_attached_sas_address(struct isci_port *iport, struct sci_sas_address *sas)
+{
+        struct isci_phy *iphy;
+
+        /*
+         * Ensure that the phy is both part of the port and currently
+         * connected to the remote end-point.
+         */
+        iphy = sci_port_get_a_connected_phy(iport);
+        if (iphy) {
+                if (iphy->protocol != SCIC_SDS_PHY_PROTOCOL_SATA) {
+                        sci_phy_get_attached_sas_address(iphy, sas);
+                } else {
+                        sci_phy_get_sas_address(iphy, sas);
+                        sas->low += iphy->phy_index;
+                }
+        } else {
+                sas->high = 0;
+                sas->low  = 0;
+        }
+}
+
+/**
+ * sci_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 sci_port_construct_dummy_rnc(struct isci_port *iport, u16 rni)
+{
+        union scu_remote_node_context *rnc;
+
+        rnc = &iport->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 = iport->physical_port_index;
+
+        rnc->ssp.nexus_loss_timer_enable = false;
+        rnc->ssp.check_bit = false;
+        rnc->ssp.is_valid = true;
+        rnc->ssp.is_remote_node_context = true;
+        rnc->ssp.function_number = 0;
+        rnc->ssp.arbitration_wait_time = 0;
+}
+
+/*
+ * construct a dummy task context data structure.  This
+ * structure will be posted to the hardwre to work around a scheduler error
+ * in the hardware.
+ */
+static void sci_port_construct_dummy_task(struct isci_port *iport, u16 tag)
+{
+        struct isci_host *ihost = iport->owning_controller;
+        struct scu_task_context *task_context;
+
+        task_context = &ihost->task_context_table[ISCI_TAG_TCI(tag)];
+        memset(task_context, 0, sizeof(struct scu_task_context));
+
+        task_context->initiator_request = 1;
+        task_context->connection_rate = 1;
+        task_context->logical_port_index = iport->physical_port_index;
+        task_context->protocol_type = SCU_TASK_CONTEXT_PROTOCOL_SSP;
+        task_context->task_index = ISCI_TAG_TCI(tag);
+        task_context->valid = SCU_TASK_CONTEXT_VALID;
+        task_context->context_type = SCU_TASK_CONTEXT_TYPE;
+        task_context->remote_node_index = iport->reserved_rni;
+        task_context->do_not_dma_ssp_good_response = 1;
+        task_context->task_phase = 0x01;
+}
+
+static void sci_port_destroy_dummy_resources(struct isci_port *iport)
+{
+        struct isci_host *ihost = iport->owning_controller;
+
+        if (iport->reserved_tag != SCI_CONTROLLER_INVALID_IO_TAG)
+                isci_free_tag(ihost, iport->reserved_tag);
+
+        if (iport->reserved_rni != SCU_DUMMY_INDEX)
+                sci_remote_node_table_release_remote_node_index(&ihost->available_remote_nodes,
+                                                                     1, iport->reserved_rni);
+
+        iport->reserved_rni = SCU_DUMMY_INDEX;
+        iport->reserved_tag = SCI_CONTROLLER_INVALID_IO_TAG;
+}
+
+void sci_port_setup_transports(struct isci_port *iport, u32 device_id)
+{
+        u8 index;
+
+        for (index = 0; index < SCI_MAX_PHYS; index++) {
+                if (iport->active_phy_mask & (1 << index))
+                        sci_phy_setup_transport(iport->phy_table[index], device_id);
+        }
+}
+
+static void sci_port_activate_phy(struct isci_port *iport, struct isci_phy *iphy,
+                                  bool do_notify_user)
+{
+        struct isci_host *ihost = iport->owning_controller;
+
+        if (iphy->protocol != SCIC_SDS_PHY_PROTOCOL_SATA)
+                sci_phy_resume(iphy);
+
+        iport->active_phy_mask |= 1 << iphy->phy_index;
+
+        sci_controller_clear_invalid_phy(ihost, iphy);
+
+        if (do_notify_user == true)
+                isci_port_link_up(ihost, iport, iphy);
+}
+
+void sci_port_deactivate_phy(struct isci_port *iport, struct isci_phy *iphy,
+                             bool do_notify_user)
+{
+        struct isci_host *ihost = iport->owning_controller;
+
+        iport->active_phy_mask &= ~(1 << iphy->phy_index);
+
+        iphy->max_negotiated_speed = SAS_LINK_RATE_UNKNOWN;
+
+        /* Re-assign the phy back to the LP as if it were a narrow port */
+        writel(iphy->phy_index,
+                &iport->port_pe_configuration_register[iphy->phy_index]);
+
+        if (do_notify_user == true)
+                isci_port_link_down(ihost, iphy, iport);
+}
+
+static void sci_port_invalid_link_up(struct isci_port *iport, struct isci_phy *iphy)
+{
+        struct isci_host *ihost = iport->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 ((ihost->invalid_phy_mask & (1 << iphy->phy_index)) == 0) {
+                ihost->invalid_phy_mask |= 1 << iphy->phy_index;
+                dev_warn(&ihost->pdev->dev, "Invalid link up!\n");
+        }
+}
+
+static bool is_port_ready_state(enum sci_port_states state)
+{
+        switch (state) {
+        case SCI_PORT_READY:
+        case SCI_PORT_SUB_WAITING:
+        case SCI_PORT_SUB_OPERATIONAL:
+        case SCI_PORT_SUB_CONFIGURING:
+                return true;
+        default:
+                return false;
+        }
+}
+
+/* flag dummy rnc hanling when exiting a ready state */
+static void port_state_machine_change(struct isci_port *iport,
+                                      enum sci_port_states state)
+{
+        struct sci_base_state_machine *sm = &iport->sm;
+        enum sci_port_states old_state = sm->current_state_id;
+
+        if (is_port_ready_state(old_state) && !is_port_ready_state(state))
+                iport->ready_exit = true;
+
+        sci_change_state(sm, state);
+        iport->ready_exit = false;
+}
+
+/**
+ * sci_port_general_link_up_handler - phy can be assigned to port?
+ * @sci_port: sci_port object for which has a phy that has gone link up.
+ * @sci_phy: This is the struct isci_phy object that has gone link up.
+ * @do_notify_user: This parameter specifies whether to inform the user (via
+ *    sci_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 sci_port_general_link_up_handler(struct isci_port *iport,
+                                                  struct isci_phy *iphy,
+                                                  bool do_notify_user)
+{
+        struct sci_sas_address port_sas_address;
+        struct sci_sas_address phy_sas_address;
+
+        sci_port_get_attached_sas_address(iport, &port_sas_address);
+        sci_phy_get_attached_sas_address(iphy, &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) ||
+            iport->active_phy_mask == 0) {
+                struct sci_base_state_machine *sm = &iport->sm;
+
+                sci_port_activate_phy(iport, iphy, do_notify_user);
+                if (sm->current_state_id == SCI_PORT_RESETTING)
+                        port_state_machine_change(iport, SCI_PORT_READY);
+        } else
+                sci_port_invalid_link_up(iport, iphy);
+}
+
+
+
+/**
+ * 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 sci_port_is_wide(struct isci_port *iport)
+{
+        u32 index;
+        u32 phy_count = 0;
+
+        for (index = 0; index < SCI_MAX_PHYS; index++) {
+                if (iport->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 sci_port_link_detected(
+        struct isci_port *iport,
+        struct isci_phy *iphy)
+{
+        if ((iport->logical_port_index != SCIC_SDS_DUMMY_PORT) &&
+            (iphy->protocol == SCIC_SDS_PHY_PROTOCOL_SATA) &&
+            sci_port_is_wide(iport)) {
+                sci_port_invalid_link_up(iport, iphy);
+
+                return false;
+        }
+
+        return true;
+}
+
+static void port_timeout(unsigned long data)
+{
+        struct sci_timer *tmr = (struct sci_timer *)data;
+        struct isci_port *iport = container_of(tmr, typeof(*iport), timer);
+        struct isci_host *ihost = iport->owning_controller;
+        unsigned long flags;
+        u32 current_state;
+
+        spin_lock_irqsave(&ihost->scic_lock, flags);
+
+        if (tmr->cancel)
+                goto done;
+
+        current_state = iport->sm.current_state_id;
+
+        if (current_state == SCI_PORT_RESETTING) {
+                /* if the port is still in the resetting state then the timeout
+                 * fired before the reset completed.
+                 */
+                port_state_machine_change(iport, SCI_PORT_FAILED);
+        } else if (current_state == SCI_PORT_STOPPED) {
+                /* if the port is stopped then the start request failed In this
+                 * case stay in the stopped state.
+                 */
+                dev_err(sciport_to_dev(iport),
+                        "%s: SCIC Port 0x%p failed to stop before tiemout.\n",
+                        __func__,
+                        iport);
+        } else if (current_state == SCI_PORT_STOPPING) {
+                /* if the port is still stopping then the stop has not completed */
+                isci_port_stop_complete(iport->owning_controller,
+                                        iport,
+                                        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(iport),
+                        "%s: SCIC Port 0x%p is processing a timeout operation "
+                        "in state %d.\n", __func__, iport, current_state);
+        }
+
+done:
+        spin_unlock_irqrestore(&ihost->scic_lock, flags);
+}
+
+/* --------------------------------------------------------------------------- */
+
+/**
+ * This function updates the hardwares VIIT entry for this port.
+ *
+ *
+ */
+static void sci_port_update_viit_entry(struct isci_port *iport)
+{
+        struct sci_sas_address sas_address;
+
+        sci_port_get_sas_address(iport, &sas_address);
+
+        writel(sas_address.high,
+                &iport->viit_registers->initiator_sas_address_hi);
+        writel(sas_address.low,
+                &iport->viit_registers->initiator_sas_address_lo);
+
+        /* This value get cleared just in case its not already cleared */
+        writel(0, &iport->viit_registers->reserved);
+
+        /* We are required to update the status register last */
+        writel(SCU_VIIT_ENTRY_ID_VIIT |
+               SCU_VIIT_IPPT_INITIATOR |
+               ((1 << iport->physical_port_index) << SCU_VIIT_ENTRY_LPVIE_SHIFT) |
+               SCU_VIIT_STATUS_ALL_VALID,
+               &iport->viit_registers->status);
+}
+
+enum sas_linkrate sci_port_get_max_allowed_speed(struct isci_port *iport)
+{
+        u16 index;
+        struct isci_phy *iphy;
+        enum sas_linkrate max_allowed_speed = SAS_LINK_RATE_6_0_GBPS;
+
+        /*
+         * 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++) {
+                iphy = iport->phy_table[index];
+                if (iphy && sci_port_active_phy(iport, iphy) &&
+                    iphy->max_negotiated_speed < max_allowed_speed)
+                        max_allowed_speed = iphy->max_negotiated_speed;
+        }
+
+        return max_allowed_speed;
+}
+
+static void sci_port_suspend_port_task_scheduler(struct isci_port *iport)
+{
+        u32 pts_control_value;
+
+        pts_control_value = readl(&iport->port_task_scheduler_registers->control);
+        pts_control_value |= SCU_PTSxCR_GEN_BIT(SUSPEND);
+        writel(pts_control_value, &iport->port_task_scheduler_registers->control);
+}
+
+/**
+ * sci_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 sci_port_post_dummy_request(struct isci_port *iport)
+{
+        struct isci_host *ihost = iport->owning_controller;
+        u16 tag = iport->reserved_tag;
+        struct scu_task_context *tc;
+        u32 command;
+
+        tc = &ihost->task_context_table[ISCI_TAG_TCI(tag)];
+        tc->abort = 0;
+
+        command = SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_TC |
+                  iport->physical_port_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT |
+                  ISCI_TAG_TCI(tag);
+
+        sci_controller_post_request(ihost, 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 sci_port_abort_dummy_request(struct isci_port *iport)
+{
+        struct isci_host *ihost = iport->owning_controller;
+        u16 tag = iport->reserved_tag;
+        struct scu_task_context *tc;
+        u32 command;
+
+        tc = &ihost->task_context_table[ISCI_TAG_TCI(tag)];
+        tc->abort = 1;
+
+        command = SCU_CONTEXT_COMMAND_REQUEST_POST_TC_ABORT |
+                  iport->physical_port_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT |
+                  ISCI_TAG_TCI(tag);
+
+        sci_controller_post_request(ihost, command);
+}
+
+/**
+ *
+ * @sci_port: This is the struct isci_port object to resume.
+ *
+ * This method will resume the port task scheduler for this port object. none
+ */
+static void
+sci_port_resume_port_task_scheduler(struct isci_port *iport)
+{
+        u32 pts_control_value;
+
+        pts_control_value = readl(&iport->port_task_scheduler_registers->control);
+        pts_control_value &= ~SCU_PTSxCR_GEN_BIT(SUSPEND);
+        writel(pts_control_value, &iport->port_task_scheduler_registers->control);
+}
+
+static void sci_port_ready_substate_waiting_enter(struct sci_base_state_machine *sm)
+{
+        struct isci_port *iport = container_of(sm, typeof(*iport), sm);
+
+        sci_port_suspend_port_task_scheduler(iport);
+
+        iport->not_ready_reason = SCIC_PORT_NOT_READY_NO_ACTIVE_PHYS;
+
+        if (iport->active_phy_mask != 0) {
+                /* At least one of the phys on the port is ready */
+                port_state_machine_change(iport,
+                                          SCI_PORT_SUB_OPERATIONAL);
+        }
+}
+
+static void sci_port_ready_substate_operational_enter(struct sci_base_state_machine *sm)
+{
+        u32 index;
+        struct isci_port *iport = container_of(sm, typeof(*iport), sm);
+        struct isci_host *ihost = iport->owning_controller;
+
+        isci_port_ready(ihost, iport);
+
+        for (index = 0; index < SCI_MAX_PHYS; index++) {
+                if (iport->phy_table[index]) {
+                        writel(iport->physical_port_index,
+                                &iport->port_pe_configuration_register[
+                                        iport->phy_table[index]->phy_index]);
+                }
+        }
+
+        sci_port_update_viit_entry(iport);
+
+        sci_port_resume_port_task_scheduler(iport);
+
+        /*
+         * Post the dummy task for the port so the hardware can schedule
+         * io correctly
+         */
+        sci_port_post_dummy_request(iport);
+}
+
+static void sci_port_invalidate_dummy_remote_node(struct isci_port *iport)
+{
+        struct isci_host *ihost = iport->owning_controller;
+        u8 phys_index = iport->physical_port_index;
+        union scu_remote_node_context *rnc;
+        u16 rni = iport->reserved_rni;
+        u32 command;
+
+        rnc = &ihost->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(&ihost->smu_registers->interrupt_status); /* flush */
+        udelay(10);
+
+        command = SCU_CONTEXT_COMMAND_POST_RNC_INVALIDATE |
+                  phys_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT | rni;
+
+        sci_controller_post_request(ihost, command);
+}
+
+/**
+ *
+ * @object: This is the object which is cast to a struct isci_port object.
+ *
+ * This method will perform the actions required by the struct isci_port on
+ * exiting the SCI_PORT_SUB_OPERATIONAL. This function reports
+ * the port not ready and suspends the port task scheduler. none
+ */
+static void sci_port_ready_substate_operational_exit(struct sci_base_state_machine *sm)
+{
+        struct isci_port *iport = container_of(sm, typeof(*iport), sm);
+        struct isci_host *ihost = iport->owning_controller;
+
+        /*
+         * 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.
+         */
+        sci_port_abort_dummy_request(iport);
+
+        isci_port_not_ready(ihost, iport);
+
+        if (iport->ready_exit)
+                sci_port_invalidate_dummy_remote_node(iport);
+}
+
+static void sci_port_ready_substate_configuring_enter(struct sci_base_state_machine *sm)
+{
+        struct isci_port *iport = container_of(sm, typeof(*iport), sm);
+        struct isci_host *ihost = iport->owning_controller;
+
+        if (iport->active_phy_mask == 0) {
+                isci_port_not_ready(ihost, iport);
+
+                port_state_machine_change(iport,
+                                          SCI_PORT_SUB_WAITING);
+        } else if (iport->started_request_count == 0)
+                port_state_machine_change(iport,
+                                          SCI_PORT_SUB_OPERATIONAL);
+}
+
+static void sci_port_ready_substate_configuring_exit(struct sci_base_state_machine *sm)
+{
+        struct isci_port *iport = container_of(sm, typeof(*iport), sm);
+
+        sci_port_suspend_port_task_scheduler(iport);
+        if (iport->ready_exit)
+                sci_port_invalidate_dummy_remote_node(iport);
+}
+
+enum sci_status sci_port_start(struct isci_port *iport)
+{
+        struct isci_host *ihost = iport->owning_controller;
+        enum sci_status status = SCI_SUCCESS;
+        enum sci_port_states state;
+        u32 phy_mask;
+
+        state = iport->sm.current_state_id;
+        if (state != SCI_PORT_STOPPED) {
+                dev_warn(sciport_to_dev(iport),
+                         "%s: in wrong state: %d\n", __func__, state);
+                return SCI_FAILURE_INVALID_STATE;
+        }
+
+        if (iport->assigned_device_count > 0) {
+                /* TODO This is a start failure operation because
+                 * there are still devices assigned to this port.
+                 * There must be no devices assigned to a port on a
+                 * start operation.
+                 */
+                return SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION;
+        }
+
+        if (iport->reserved_rni == SCU_DUMMY_INDEX) {
+                u16 rni = sci_remote_node_table_allocate_remote_node(
+                                &ihost->available_remote_nodes, 1);
+
+                if (rni != SCU_DUMMY_INDEX)
+                        sci_port_construct_dummy_rnc(iport, rni);
+                else
+                        status = SCI_FAILURE_INSUFFICIENT_RESOURCES;
+                iport->reserved_rni = rni;
+        }
+
+        if (iport->reserved_tag == SCI_CONTROLLER_INVALID_IO_TAG) {
+                u16 tag;
+
+                tag = isci_alloc_tag(ihost);
+                if (tag == SCI_CONTROLLER_INVALID_IO_TAG)
+                        status = SCI_FAILURE_INSUFFICIENT_RESOURCES;
+                else
+                        sci_port_construct_dummy_task(iport, tag);
+                iport->reserved_tag = tag;
+        }
+
+        if (status == SCI_SUCCESS) {
+                phy_mask = sci_port_get_phys(iport);
+
+                /*
+                 * 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 (sci_port_is_phy_mask_valid(iport, phy_mask) == true) {
+                        port_state_machine_change(iport,
+                                                  SCI_PORT_READY);
+
+                        return SCI_SUCCESS;
+                }
+                status = SCI_FAILURE;
+        }
+
+        if (status != SCI_SUCCESS)
+                sci_port_destroy_dummy_resources(iport);
+
+        return status;
+}
+
+enum sci_status sci_port_stop(struct isci_port *iport)
+{
+        enum sci_port_states state;
+
+        state = iport->sm.current_state_id;
+        switch (state) {
+        case SCI_PORT_STOPPED:
+                return SCI_SUCCESS;
+        case SCI_PORT_SUB_WAITING:
+        case SCI_PORT_SUB_OPERATIONAL:
+        case SCI_PORT_SUB_CONFIGURING:
+        case SCI_PORT_RESETTING:
+                port_state_machine_change(iport,
+                                          SCI_PORT_STOPPING);
+                return SCI_SUCCESS;
+        default:
+                dev_warn(sciport_to_dev(iport),
+                         "%s: in wrong state: %d\n", __func__, state);
+                return SCI_FAILURE_INVALID_STATE;
+        }
+}
+
+static enum sci_status sci_port_hard_reset(struct isci_port *iport, u32 timeout)
+{
+        enum sci_status status = SCI_FAILURE_INVALID_PHY;
+        struct isci_phy *iphy = NULL;
+        enum sci_port_states state;
+        u32 phy_index;
+
+        state = iport->sm.current_state_id;
+        if (state != SCI_PORT_SUB_OPERATIONAL) {
+                dev_warn(sciport_to_dev(iport),
+                         "%s: in wrong state: %d\n", __func__, state);
+                return SCI_FAILURE_INVALID_STATE;
+        }
+
+        /* Select a phy on which we can send the hard reset request. */
+        for (phy_index = 0; phy_index < SCI_MAX_PHYS && !iphy; phy_index++) {
+                iphy = iport->phy_table[phy_index];
+                if (iphy && !sci_port_active_phy(iport, iphy)) {
+                        /*
+                         * We found a phy but it is not ready select
+                         * different phy
+                         */
+                        iphy = NULL;
+                }
+        }
+
+        /* If we have a phy then go ahead and start the reset procedure */
+        if (!iphy)
+                return status;
+        status = sci_phy_reset(iphy);
+
+        if (status != SCI_SUCCESS)
+                return status;
+
+        sci_mod_timer(&iport->timer, timeout);
+        iport->not_ready_reason = SCIC_PORT_NOT_READY_HARD_RESET_REQUESTED;
+
+        port_state_machine_change(iport, SCI_PORT_RESETTING);
+        return SCI_SUCCESS;
+}
+
+/**
+ * sci_port_add_phy() -
+ * @sci_port: This parameter specifies the port in which the phy will be added.
+ * @sci_phy: This parameter is the phy which is to be added to the port.
+ *
+ * This method will add a PHY to the selected port. This method returns an
+ * enum sci_status. SCI_SUCCESS the phy has been added to the port. Any other
+ * status is a failure to add the phy to the port.
+ */
+enum sci_status sci_port_add_phy(struct isci_port *iport,
+                                      struct isci_phy *iphy)
+{
+        enum sci_status status;
+        enum sci_port_states state;
+
+        state = iport->sm.current_state_id;
+        switch (state) {
+        case SCI_PORT_STOPPED: {
+                struct sci_sas_address port_sas_address;
+
+                /* Read the port assigned SAS Address if there is one */
+                sci_port_get_sas_address(iport, &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
+                         */
+                        sci_phy_get_sas_address(iphy, &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 sci_port_set_phy(iport, iphy);
+        }
+        case SCI_PORT_SUB_WAITING:
+        case SCI_PORT_SUB_OPERATIONAL:
+                status = sci_port_set_phy(iport, iphy);
+
+                if (status != SCI_SUCCESS)
+                        return status;
+
+                sci_port_general_link_up_handler(iport, iphy, true);
+                iport->not_ready_reason = SCIC_PORT_NOT_READY_RECONFIGURING;
+                port_state_machine_change(iport, SCI_PORT_SUB_CONFIGURING);
+
+                return status;
+        case SCI_PORT_SUB_CONFIGURING:
+                status = sci_port_set_phy(iport, iphy);
+
+                if (status != SCI_SUCCESS)
+                        return status;
+                sci_port_general_link_up_handler(iport, iphy, true);
+
+                /* Re-enter the configuring state since this may be the last phy in
+                 * the port.
+                 */
+                port_state_machine_change(iport,
+                                          SCI_PORT_SUB_CONFIGURING);
+                return SCI_SUCCESS;
+        default:
+                dev_warn(sciport_to_dev(iport),
+                         "%s: in wrong state: %d\n", __func__, state);
+                return SCI_FAILURE_INVALID_STATE;
+        }
+}
+
+/**
+ * sci_port_remove_phy() -
+ * @sci_port: This parameter specifies the port in which the phy will be added.
+ * @sci_phy: This parameter is the phy which is to be added to the port.
+ *
+ * This method will remove the PHY from the selected PORT. This method returns
+ * an enum sci_status. SCI_SUCCESS the phy has been removed from the port. Any
+ * other status is a failure to add the phy to the port.
+ */
+enum sci_status sci_port_remove_phy(struct isci_port *iport,
+                                         struct isci_phy *iphy)
+{
+        enum sci_status status;
+        enum sci_port_states state;
+
+        state = iport->sm.current_state_id;
+
+        switch (state) {
+        case SCI_PORT_STOPPED:
+                return sci_port_clear_phy(iport, iphy);
+        case SCI_PORT_SUB_OPERATIONAL:
+                status = sci_port_clear_phy(iport, iphy);
+                if (status != SCI_SUCCESS)
+                        return status;
+
+                sci_port_deactivate_phy(iport, iphy, true);
+                iport->not_ready_reason = SCIC_PORT_NOT_READY_RECONFIGURING;
+                port_state_machine_change(iport,
+                                          SCI_PORT_SUB_CONFIGURING);
+                return SCI_SUCCESS;
+        case SCI_PORT_SUB_CONFIGURING:
+                status = sci_port_clear_phy(iport, iphy);
+
+                if (status != SCI_SUCCESS)
+                        return status;
+                sci_port_deactivate_phy(iport, iphy, true);
+
+                /* Re-enter the configuring state since this may be the last phy in
+                 * the port
+                 */
+                port_state_machine_change(iport,
+                                          SCI_PORT_SUB_CONFIGURING);
+                return SCI_SUCCESS;
+        default:
+                dev_warn(sciport_to_dev(iport),
+                         "%s: in wrong state: %d\n", __func__, state);
+                return SCI_FAILURE_INVALID_STATE;
+        }
+}
+
+enum sci_status sci_port_link_up(struct isci_port *iport,
+                                      struct isci_phy *iphy)
+{
+        enum sci_port_states state;
+
+        state = iport->sm.current_state_id;
+        switch (state) {
+        case SCI_PORT_SUB_WAITING:
+                /* Since this is the first phy going link up for the port we
+                 * can just enable it and continue
+                 */
+                sci_port_activate_phy(iport, iphy, true);
+
+                port_state_machine_change(iport,
+                                          SCI_PORT_SUB_OPERATIONAL);
+                return SCI_SUCCESS;
+        case SCI_PORT_SUB_OPERATIONAL:
+                sci_port_general_link_up_handler(iport, iphy, true);
+                return SCI_SUCCESS;
+        case SCI_PORT_RESETTING:
+                /* TODO We should  make  sure  that  the phy  that  has gone
+                 * link up is the same one on which we sent the reset.  It is
+                 * possible that the phy on which we sent  the reset is not the
+                 * one that has  gone  link up  and we  want to make sure that
+                 * phy being reset  comes  back.  Consider the case where a
+                 * reset is sent but before the hardware processes the reset it
+                 * get a link up on  the  port because of a hot plug event.
+                 * because  of  the reset request this phy will go link down
+                 * almost immediately.
+                 */
+
+                /* In the resetting state we don't notify the user regarding
+                 * link up and link down notifications.
+                 */
+                sci_port_general_link_up_handler(iport, iphy, false);
+                return SCI_SUCCESS;
+        default:
+                dev_warn(sciport_to_dev(iport),
+                         "%s: in wrong state: %d\n", __func__, state);
+                return SCI_FAILURE_INVALID_STATE;
+        }
+}
+
+enum sci_status sci_port_link_down(struct isci_port *iport,
+                                        struct isci_phy *iphy)
+{
+        enum sci_port_states state;
+
+        state = iport->sm.current_state_id;
+        switch (state) {
+        case SCI_PORT_SUB_OPERATIONAL:
+                sci_port_deactivate_phy(iport, iphy, 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 (iport->active_phy_mask == 0)
+                        port_state_machine_change(iport,
+                                                  SCI_PORT_SUB_WAITING);
+                return SCI_SUCCESS;
+        case SCI_PORT_RESETTING:
+                /* In the resetting state we don't notify the user regarding
+                 * link up and link down notifications. */
+                sci_port_deactivate_phy(iport, iphy, false);
+                return SCI_SUCCESS;
+        default:
+                dev_warn(sciport_to_dev(iport),
+                         "%s: in wrong state: %d\n", __func__, state);
+                return SCI_FAILURE_INVALID_STATE;
+        }
+}
+
+enum sci_status sci_port_start_io(struct isci_port *iport,
+                                  struct isci_remote_device *idev,
+                                  struct isci_request *ireq)
+{
+        enum sci_port_states state;
+
+        state = iport->sm.current_state_id;
+        switch (state) {
+        case SCI_PORT_SUB_WAITING:
+                return SCI_FAILURE_INVALID_STATE;
+        case SCI_PORT_SUB_OPERATIONAL:
+                iport->started_request_count++;
+                return SCI_SUCCESS;
+        default:
+                dev_warn(sciport_to_dev(iport),
+                         "%s: in wrong state: %d\n", __func__, state);
+                return SCI_FAILURE_INVALID_STATE;
+        }
+}
+
+enum sci_status sci_port_complete_io(struct isci_port *iport,
+                                     struct isci_remote_device *idev,
+                                     struct isci_request *ireq)
+{
+        enum sci_port_states state;
+
+        state = iport->sm.current_state_id;
+        switch (state) {
+        case SCI_PORT_STOPPED:
+                dev_warn(sciport_to_dev(iport),
+                         "%s: in wrong state: %d\n", __func__, state);
+                return SCI_FAILURE_INVALID_STATE;
+        case SCI_PORT_STOPPING:
+                sci_port_decrement_request_count(iport);
+
+                if (iport->started_request_count == 0)
+                        port_state_machine_change(iport,
+                                                  SCI_PORT_STOPPED);
+                break;
+        case SCI_PORT_READY:
+        case SCI_PORT_RESETTING:
+        case SCI_PORT_FAILED:
+        case SCI_PORT_SUB_WAITING:
+        case SCI_PORT_SUB_OPERATIONAL:
+                sci_port_decrement_request_count(iport);
+                break;
+        case SCI_PORT_SUB_CONFIGURING:
+                sci_port_decrement_request_count(iport);
+                if (iport->started_request_count == 0) {
+                        port_state_machine_change(iport,
+                                                  SCI_PORT_SUB_OPERATIONAL);
+                }
+                break;
+        }
+        return SCI_SUCCESS;
+}
+
+static void sci_port_enable_port_task_scheduler(struct isci_port *iport)
+{
+        u32 pts_control_value;
+
+         /* enable the port task scheduler in a suspended state */
+        pts_control_value = readl(&iport->port_task_scheduler_registers->control);
+        pts_control_value |= SCU_PTSxCR_GEN_BIT(ENABLE) | SCU_PTSxCR_GEN_BIT(SUSPEND);
+        writel(pts_control_value, &iport->port_task_scheduler_registers->control);
+}
+
+static void sci_port_disable_port_task_scheduler(struct isci_port *iport)
+{
+        u32 pts_control_value;
+
+        pts_control_value = readl(&iport->port_task_scheduler_registers->control);
+        pts_control_value &=
+                ~(SCU_PTSxCR_GEN_BIT(ENABLE) | SCU_PTSxCR_GEN_BIT(SUSPEND));
+        writel(pts_control_value, &iport->port_task_scheduler_registers->control);
+}
+
+static void sci_port_post_dummy_remote_node(struct isci_port *iport)
+{
+        struct isci_host *ihost = iport->owning_controller;
+        u8 phys_index = iport->physical_port_index;
+        union scu_remote_node_context *rnc;
+        u16 rni = iport->reserved_rni;
+        u32 command;
+
+        rnc = &ihost->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;
+
+        sci_controller_post_request(ihost, command);
+
+        /* ensure hardware has seen the post rnc command and give it
+         * ample time to act before sending the suspend
+         */
+        readl(&ihost->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;
+
+        sci_controller_post_request(ihost, command);
+}
+
+static void sci_port_stopped_state_enter(struct sci_base_state_machine *sm)
+{
+        struct isci_port *iport = container_of(sm, typeof(*iport), sm);
+
+        if (iport->sm.previous_state_id == SCI_PORT_STOPPING) {
+                /*
+                 * If we enter this state becasuse of a request to stop
+                 * the port then we want to disable the hardwares port
+                 * task scheduler. */
+                sci_port_disable_port_task_scheduler(iport);
+        }
+}
+
+static void sci_port_stopped_state_exit(struct sci_base_state_machine *sm)
+{
+        struct isci_port *iport = container_of(sm, typeof(*iport), sm);
+
+        /* Enable and suspend the port task scheduler */
+        sci_port_enable_port_task_scheduler(iport);
+}
+
+static void sci_port_ready_state_enter(struct sci_base_state_machine *sm)
+{
+        struct isci_port *iport = container_of(sm, typeof(*iport), sm);
+        struct isci_host *ihost = iport->owning_controller;
+        u32 prev_state;
+
+        prev_state = iport->sm.previous_state_id;
+        if (prev_state  == SCI_PORT_RESETTING)
+                isci_port_hard_reset_complete(iport, SCI_SUCCESS);
+        else
+                isci_port_not_ready(ihost, iport);
+
+        /* Post and suspend the dummy remote node context for this port. */
+        sci_port_post_dummy_remote_node(iport);
+
+        /* Start the ready substate machine */
+        port_state_machine_change(iport,
+                                  SCI_PORT_SUB_WAITING);
+}
+
+static void sci_port_resetting_state_exit(struct sci_base_state_machine *sm)
+{
+        struct isci_port *iport = container_of(sm, typeof(*iport), sm);
+
+        sci_del_timer(&iport->timer);
+}
+
+static void sci_port_stopping_state_exit(struct sci_base_state_machine *sm)
+{
+        struct isci_port *iport = container_of(sm, typeof(*iport), sm);
+
+        sci_del_timer(&iport->timer);
+
+        sci_port_destroy_dummy_resources(iport);
+}
+
+static void sci_port_failed_state_enter(struct sci_base_state_machine *sm)
+{
+        struct isci_port *iport = container_of(sm, typeof(*iport), sm);
+
+        isci_port_hard_reset_complete(iport, SCI_FAILURE_TIMEOUT);
+}
+
+/* --------------------------------------------------------------------------- */
+
+static const struct sci_base_state sci_port_state_table[] = {
+        [SCI_PORT_STOPPED] = {
+                .enter_state = sci_port_stopped_state_enter,
+                .exit_state  = sci_port_stopped_state_exit
+        },
+        [SCI_PORT_STOPPING] = {
+                .exit_state  = sci_port_stopping_state_exit
+        },
+        [SCI_PORT_READY] = {
+                .enter_state = sci_port_ready_state_enter,
+        },
+        [SCI_PORT_SUB_WAITING] = {
+                .enter_state = sci_port_ready_substate_waiting_enter,
+        },
+        [SCI_PORT_SUB_OPERATIONAL] = {
+                .enter_state = sci_port_ready_substate_operational_enter,
+                .exit_state  = sci_port_ready_substate_operational_exit
+        },
+        [SCI_PORT_SUB_CONFIGURING] = {
+                .enter_state = sci_port_ready_substate_configuring_enter,
+                .exit_state  = sci_port_ready_substate_configuring_exit
+        },
+        [SCI_PORT_RESETTING] = {
+                .exit_state  = sci_port_resetting_state_exit
+        },
+        [SCI_PORT_FAILED] = {
+                .enter_state = sci_port_failed_state_enter,
+        }
+};
+
+void sci_port_construct(struct isci_port *iport, u8 index,
+                             struct isci_host *ihost)
+{
+        sci_init_sm(&iport->sm, sci_port_state_table, SCI_PORT_STOPPED);
+
+        iport->logical_port_index  = SCIC_SDS_DUMMY_PORT;
+        iport->physical_port_index = index;
+        iport->active_phy_mask     = 0;
+        iport->ready_exit             = false;
+
+        iport->owning_controller = ihost;
+
+        iport->started_request_count = 0;
+        iport->assigned_device_count = 0;
+
+        iport->reserved_rni = SCU_DUMMY_INDEX;
+        iport->reserved_tag = SCI_CONTROLLER_INVALID_IO_TAG;
+
+        sci_init_timer(&iport->timer, port_timeout);
+
+        iport->port_task_scheduler_registers = NULL;
+
+        for (index = 0; index < SCI_MAX_PHYS; index++)
+                iport->phy_table[index] = NULL;
+}
+
+void isci_port_init(struct isci_port *iport, struct isci_host *ihost, int index)
+{
+        INIT_LIST_HEAD(&iport->remote_dev_list);
+        INIT_LIST_HEAD(&iport->domain_dev_list);
+        spin_lock_init(&iport->state_lock);
+        init_completion(&iport->start_complete);
+        iport->isci_host = ihost;
+        isci_port_change_state(iport, isci_freed);
+        atomic_set(&iport->event, 0);
+}
+
+/**
+ * isci_port_get_state() - This function gets the status of the port object.
+ * @isci_port: This parameter points to the isci_port object
+ *
+ * status of the object as a isci_status enum.
+ */
+enum isci_status isci_port_get_state(
+        struct isci_port *isci_port)
+{
+        return isci_port->status;
+}
+
+void sci_port_broadcast_change_received(struct isci_port *iport, struct isci_phy *iphy)
+{
+        struct isci_host *ihost = iport->owning_controller;
+
+        /* notify the user. */
+        isci_port_bc_change_received(ihost, iport, iphy);
+}
+
+int isci_port_perform_hard_reset(struct isci_host *ihost, struct isci_port *iport,
+                                 struct isci_phy *iphy)
+{
+        unsigned long flags;
+        enum sci_status status;
+        int idx, ret = TMF_RESP_FUNC_COMPLETE;
+
+        dev_dbg(&ihost->pdev->dev, "%s: iport = %p\n",
+                __func__, iport);
+
+        init_completion(&iport->hard_reset_complete);
+
+        spin_lock_irqsave(&ihost->scic_lock, flags);
+
+        #define ISCI_PORT_RESET_TIMEOUT SCIC_SDS_SIGNATURE_FIS_TIMEOUT
+        status = sci_port_hard_reset(iport, 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; sci_port_hard_reset call"
+                        " failed 0x%x\n",
+                        __func__, iport, status);
+
+        }
+
+        /* If the hard reset for the port has failed, consider this
+         * the same as link failures on all phys in the port.
+         */
+        if (ret != TMF_RESP_FUNC_COMPLETE) {
+
+                dev_err(&ihost->pdev->dev,
+                        "%s: iport = %p; hard reset failed "
+                        "(0x%x) - driving explicit link fail for all phys\n",
+                        __func__, iport, iport->hard_reset_status);
+
+                /* Down all phys in the port. */
+                spin_lock_irqsave(&ihost->scic_lock, flags);
+                for (idx = 0; idx < SCI_MAX_PHYS; ++idx) {
+                        struct isci_phy *iphy = iport->phy_table[idx];
+
+                        if (!iphy)
+                                continue;
+                        sci_phy_stop(iphy);
+                        sci_phy_start(iphy);
+                }
+                spin_unlock_irqrestore(&ihost->scic_lock, flags);
+        }
+        return ret;
+}
+
+/**
+ * isci_port_deformed() - This function is called by libsas when a port becomes
+ *    inactive.
+ * @phy: This parameter specifies the libsas phy with the inactive port.
+ *
+ */
+void isci_port_deformed(struct asd_sas_phy *phy)
+{
+        pr_debug("%s: sas_phy = %p\n", __func__, phy);
+}
+
+/**
+ * isci_port_formed() - This function is called by libsas when a port becomes
+ *    active.
+ * @phy: This parameter specifies the libsas phy with the active port.
+ *
+ */
+void isci_port_formed(struct asd_sas_phy *phy)
+{
+        pr_debug("%s: sas_phy = %p, sas_port = %p\n", __func__, phy, phy->port);
+}