isci: Intel(R) C600 Series Chipset Storage Control Unit Driver

Support for the up to 2x4-port 6Gb/s SAS controllers embedded in the
chipset.

This is a snapshot of the first publicly available version of the driver,
commit 4c1db2d0 in the 'historical' branch.

   git://git.kernel.org/pub/scm/linux/kernel/git/djbw/isci.git historical

Signed-off-by: Maciej Trela <maciej.trela@intel.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Edmund Nadolski <edmund.nadolski@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

1 files changed, 781 insertions, 0 deletions

diff --git a/drivers/scsi/isci/host.c b/drivers/scsi/isci/host.c
new file mode 100644
index 000000000000..6f16f4d6c82b
--- /dev/null
+++ b/drivers/scsi/isci/host.c
@@ -0,0 +1,781 @@
+/*
+ * 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 "scic_io_request.h"
+#include "scic_remote_device.h"
+#include "scic_port.h"
+
+#include "port.h"
+#include "request.h"
+#include "host.h"
+
+/**
+ * isci_isr() - This function is the interrupt service routine for the
+ *    controller. It schedules the tasklet and returns.
+ * @vec: This parameter specifies the interrupt vector.
+ * @data: This parameter specifies the ISCI host object.
+ *
+ * IRQ_HANDLED if out interrupt otherwise, IRQ_NONE
+ */
+irqreturn_t isci_isr(int vec, void *data)
+{
+        struct isci_host *isci_host
+                = (struct isci_host *)data;
+        struct scic_controller_handler_methods *handlers
+                = &isci_host->scic_irq_handlers[SCI_MSIX_NORMAL_VECTOR];
+        irqreturn_t ret = IRQ_NONE;
+
+        if (isci_host_get_state(isci_host) != isci_starting
+            && handlers->interrupt_handler) {
+
+                if (handlers->interrupt_handler(isci_host->core_controller)) {
+                        if (isci_host_get_state(isci_host) != isci_stopped) {
+                                tasklet_schedule(
+                                        &isci_host->completion_tasklet);
+                        } else
+                                dev_dbg(&isci_host->pdev->dev,
+                                        "%s: controller stopped\n",
+                                        __func__);
+                        ret = IRQ_HANDLED;
+                }
+        } else
+                dev_warn(&isci_host->pdev->dev,
+                         "%s: get_handler_methods failed, "
+                         "isci_host->status = 0x%x\n",
+                         __func__,
+                         isci_host_get_state(isci_host));
+
+        return ret;
+}
+
+irqreturn_t isci_legacy_isr(int vec, void *data)
+{
+        struct pci_dev *pdev = data;
+        struct isci_host *isci_host;
+        struct scic_controller_handler_methods *handlers;
+        irqreturn_t ret = IRQ_NONE;
+
+        /*
+         *  Since this is a legacy interrupt, either or both
+         *  controllers could have triggered it.  Thus, we have to call
+         *  the legacy interrupt handler for all controllers on the
+         *  PCI function.
+         */
+        for_each_isci_host(isci_host, pdev) {
+                handlers = &isci_host->scic_irq_handlers[SCI_MSIX_NORMAL_VECTOR];
+
+                if (isci_host_get_state(isci_host) != isci_starting
+                    && handlers->interrupt_handler) {
+
+                        if (handlers->interrupt_handler(isci_host->core_controller)) {
+                                if (isci_host_get_state(isci_host) != isci_stopped) {
+                                        tasklet_schedule(
+                                                &isci_host->completion_tasklet);
+                                } else
+                                        dev_dbg(&isci_host->pdev->dev,
+                                                "%s: controller stopped\n",
+                                                __func__);
+                                ret = IRQ_HANDLED;
+                        }
+                } else
+                        dev_warn(&isci_host->pdev->dev,
+                                 "%s: get_handler_methods failed, "
+                                 "isci_host->status = 0x%x\n",
+                                 __func__,
+                                 isci_host_get_state(isci_host));
+        }
+        return ret;
+}
+
+
+/**
+ * isci_host_start_complete() - This function is called by the core library,
+ *    through the ISCI Module, to indicate controller start status.
+ * @isci_host: This parameter specifies the ISCI host object
+ * @completion_status: This parameter specifies the completion status from the
+ *    core library.
+ *
+ */
+void isci_host_start_complete(
+        struct isci_host *isci_host,
+        enum sci_status completion_status)
+{
+        if (completion_status == SCI_SUCCESS) {
+                dev_dbg(&isci_host->pdev->dev,
+                        "%s: completion_status: SCI_SUCCESS\n", __func__);
+                isci_host_change_state(isci_host, isci_ready);
+                complete_all(&isci_host->start_complete);
+        } else
+                dev_err(&isci_host->pdev->dev,
+                        "controller start failed with "
+                        "completion_status = 0x%x;",
+                        completion_status);
+
+}
+
+
+
+/**
+ * isci_host_scan_finished() - This function is one of the SCSI Host Template
+ *    functions. The SCSI midlayer calls this function during a target scan,
+ *    approx. once every 10 millisecs.
+ * @shost: This parameter specifies the SCSI host being scanned
+ * @time: This parameter specifies the number of ticks since the scan started.
+ *
+ * scan status, zero indicates the SCSI midlayer should continue to poll,
+ * otherwise assume controller is ready.
+ */
+int isci_host_scan_finished(
+        struct Scsi_Host *shost,
+        unsigned long time)
+{
+        struct isci_host *isci_host
+                = isci_host_from_sas_ha(SHOST_TO_SAS_HA(shost));
+
+        struct scic_controller_handler_methods *handlers
+                = &isci_host->scic_irq_handlers[SCI_MSIX_NORMAL_VECTOR];
+
+        if (handlers->interrupt_handler == NULL) {
+                dev_err(&isci_host->pdev->dev,
+                        "%s: scic_controller_get_handler_methods failed\n",
+                        __func__);
+                return 1;
+        }
+
+        /**
+         * check interrupt_handler's status and call completion_handler if true,
+         * link_up events should be coming from the scu core lib, as phy's come
+         * online. for each link_up from the core, call
+         * get_received_identify_address_frame, copy the frame into the
+         * sas_phy object and call libsas notify_port_event(PORTE_BYTES_DMAED).
+         * continue to return zero from thee scan_finished routine until
+         * the scic_cb_controller_start_complete() call comes from the core.
+         **/
+        if (handlers->interrupt_handler(isci_host->core_controller))
+                handlers->completion_handler(isci_host->core_controller);
+
+        if (isci_starting == isci_host_get_state(isci_host)
+            && time < (HZ * 10)) {
+                dev_dbg(&isci_host->pdev->dev,
+                        "%s: isci_host->status = %d, time = %ld\n",
+                             __func__, isci_host_get_state(isci_host), time);
+                return 0;
+        }
+
+
+        dev_dbg(&isci_host->pdev->dev,
+                "%s: isci_host->status = %d, time = %ld\n",
+                 __func__, isci_host_get_state(isci_host), time);
+
+        scic_controller_enable_interrupts(isci_host->core_controller);
+
+        return 1;
+
+}
+
+
+/**
+ * isci_host_scan_start() - This function is one of the SCSI Host Template
+ *    function, called by the SCSI mid layer berfore a target scan begins. The
+ *    core library controller start routine is called from here.
+ * @shost: This parameter specifies the SCSI host to be scanned
+ *
+ */
+void isci_host_scan_start(struct Scsi_Host *shost)
+{
+        struct isci_host *isci_host;
+
+        isci_host = isci_host_from_sas_ha(SHOST_TO_SAS_HA(shost));
+        isci_host_change_state(isci_host, isci_starting);
+
+        scic_controller_disable_interrupts(isci_host->core_controller);
+        init_completion(&isci_host->start_complete);
+        scic_controller_start(
+                isci_host->core_controller,
+                scic_controller_get_suggested_start_timeout(
+                        isci_host->core_controller)
+                );
+}
+
+void isci_host_stop_complete(
+        struct isci_host *isci_host,
+        enum sci_status completion_status)
+{
+        isci_host_change_state(isci_host, isci_stopped);
+        scic_controller_disable_interrupts(
+                isci_host->core_controller
+                );
+        complete(&isci_host->stop_complete);
+}
+
+static struct coherent_memory_info *isci_host_alloc_mdl_struct(
+        struct isci_host *isci_host,
+        u32 size)
+{
+        struct coherent_memory_info *mdl_struct;
+        void *uncached_address = NULL;
+
+
+        mdl_struct = devm_kzalloc(&isci_host->pdev->dev,
+                                  sizeof(*mdl_struct),
+                                  GFP_KERNEL);
+        if (!mdl_struct)
+                return NULL;
+
+        INIT_LIST_HEAD(&mdl_struct->node);
+
+        uncached_address = dmam_alloc_coherent(&isci_host->pdev->dev,
+                                               size,
+                                               &mdl_struct->dma_handle,
+                                               GFP_KERNEL);
+        if (!uncached_address)
+                return NULL;
+
+        /* memset the whole memory area. */
+        memset((char *)uncached_address, 0, size);
+        mdl_struct->vaddr = uncached_address;
+        mdl_struct->size = (size_t)size;
+
+        return mdl_struct;
+}
+
+static void isci_host_build_mde(
+        struct sci_physical_memory_descriptor *mde_struct,
+        struct coherent_memory_info *mdl_struct)
+{
+        unsigned long address = 0;
+        dma_addr_t dma_addr = 0;
+
+        address = (unsigned long)mdl_struct->vaddr;
+        dma_addr = mdl_struct->dma_handle;
+
+        /* to satisfy the alignment. */
+        if ((address % mde_struct->constant_memory_alignment) != 0) {
+                int align_offset
+                        = (mde_struct->constant_memory_alignment
+                           - (address % mde_struct->constant_memory_alignment));
+                address += align_offset;
+                dma_addr += align_offset;
+        }
+
+        mde_struct->virtual_address = (void *)address;
+        mde_struct->physical_address = dma_addr;
+        mdl_struct->mde = mde_struct;
+}
+
+static int isci_host_mdl_allocate_coherent(
+        struct isci_host *isci_host)
+{
+        struct sci_physical_memory_descriptor *current_mde;
+        struct coherent_memory_info *mdl_struct;
+        u32 size = 0;
+
+        struct sci_base_memory_descriptor_list *mdl_handle
+                = sci_controller_get_memory_descriptor_list_handle(
+                isci_host->core_controller);
+
+        sci_mdl_first_entry(mdl_handle);
+
+        current_mde = sci_mdl_get_current_entry(mdl_handle);
+
+        while (current_mde != NULL) {
+
+                size = (current_mde->constant_memory_size
+                        + current_mde->constant_memory_alignment);
+
+                mdl_struct = isci_host_alloc_mdl_struct(isci_host, size);
+                if (!mdl_struct)
+                        return -ENOMEM;
+
+                list_add_tail(&mdl_struct->node, &isci_host->mdl_struct_list);
+
+                isci_host_build_mde(current_mde, mdl_struct);
+
+                sci_mdl_next_entry(mdl_handle);
+                current_mde = sci_mdl_get_current_entry(mdl_handle);
+        }
+
+        return 0;
+}
+
+
+/**
+ * isci_host_completion_routine() - This function is the delayed service
+ *    routine that calls the sci core library's completion handler. It's
+ *    scheduled as a tasklet from the interrupt service routine when interrupts
+ *    in use, or set as the timeout function in polled mode.
+ * @data: This parameter specifies the ISCI host object
+ *
+ */
+static void isci_host_completion_routine(unsigned long data)
+{
+        struct isci_host *isci_host = (struct isci_host *)data;
+        struct scic_controller_handler_methods *handlers
+                = &isci_host->scic_irq_handlers[SCI_MSIX_NORMAL_VECTOR];
+        struct list_head completed_request_list;
+        struct list_head aborted_request_list;
+        struct list_head *current_position;
+        struct list_head *next_position;
+        struct isci_request *request;
+        struct isci_request *next_request;
+        struct sas_task *task;
+
+        INIT_LIST_HEAD(&completed_request_list);
+        INIT_LIST_HEAD(&aborted_request_list);
+
+        spin_lock_irq(&isci_host->scic_lock);
+
+        if (handlers->completion_handler) {
+                handlers->completion_handler(
+                        isci_host->core_controller
+                        );
+        }
+        /* Take the lists of completed I/Os from the host. */
+        list_splice_init(&isci_host->requests_to_complete,
+                         &completed_request_list);
+
+        list_splice_init(&isci_host->requests_to_abort,
+                         &aborted_request_list);
+
+        spin_unlock_irq(&isci_host->scic_lock);
+
+        /* Process any completions in the lists. */
+        list_for_each_safe(current_position, next_position,
+                           &completed_request_list) {
+
+                request = list_entry(current_position, struct isci_request,
+                                     completed_node);
+                task = isci_request_access_task(request);
+
+                /* Normal notification (task_done) */
+                dev_dbg(&isci_host->pdev->dev,
+                        "%s: Normal - request/task = %p/%p\n",
+                        __func__,
+                        request,
+                        task);
+
+                task->task_done(task);
+                task->lldd_task = NULL;
+
+                /* Free the request object. */
+                isci_request_free(isci_host, request);
+        }
+        list_for_each_entry_safe(request, next_request, &aborted_request_list,
+                                 completed_node) {
+
+                task = isci_request_access_task(request);
+
+                /* Use sas_task_abort */
+                dev_warn(&isci_host->pdev->dev,
+                         "%s: Error - request/task = %p/%p\n",
+                         __func__,
+                         request,
+                         task);
+
+                /* Put the task into the abort path. */
+                sas_task_abort(task);
+        }
+
+}
+
+void isci_host_deinit(
+        struct isci_host *isci_host)
+{
+        int i;
+
+        isci_host_change_state(isci_host, isci_stopping);
+        for (i = 0; i < SCI_MAX_PORTS; i++) {
+                struct isci_port *port = &isci_host->isci_ports[i];
+                struct isci_remote_device *device, *tmpdev;
+                list_for_each_entry_safe(device, tmpdev,
+                                         &port->remote_dev_list, node) {
+                        isci_remote_device_change_state(device, isci_stopping);
+                        isci_remote_device_stop(device);
+                }
+        }
+
+        /* stop the comtroller and wait for completion.  */
+        init_completion(&isci_host->stop_complete);
+        scic_controller_stop(
+                isci_host->core_controller,
+                SCIC_CONTROLLER_STOP_TIMEOUT
+                );
+        wait_for_completion(&isci_host->stop_complete);
+        /* next, reset the controller.           */
+        scic_controller_reset(isci_host->core_controller);
+}
+
+static int isci_verify_firmware(const struct firmware *fw,
+                                struct isci_firmware *isci_fw)
+{
+        const u8 *tmp;
+
+        if (fw->size < ISCI_FIRMWARE_MIN_SIZE)
+                return -EINVAL;
+
+        tmp = fw->data;
+
+        /* 12th char should be the NULL terminate for the ID string */
+        if (tmp[11] != '\0')
+                return -EINVAL;
+
+        if (strncmp("#SCU MAGIC#", tmp, 11) != 0)
+                return -EINVAL;
+
+        isci_fw->id = tmp;
+        isci_fw->version = fw->data[ISCI_FW_VER_OFS];
+        isci_fw->subversion = fw->data[ISCI_FW_SUBVER_OFS];
+
+        tmp = fw->data + ISCI_FW_DATA_OFS;
+
+        while (*tmp != ISCI_FW_HDR_EOF) {
+                switch (*tmp) {
+                case ISCI_FW_HDR_PHYMASK:
+                        tmp++;
+                        isci_fw->phy_masks_size = *tmp;
+                        tmp++;
+                        isci_fw->phy_masks = (const u32 *)tmp;
+                        tmp += sizeof(u32) * isci_fw->phy_masks_size;
+                        break;
+
+                case ISCI_FW_HDR_PHYGEN:
+                        tmp++;
+                        isci_fw->phy_gens_size = *tmp;
+                        tmp++;
+                        isci_fw->phy_gens = (const u32 *)tmp;
+                        tmp += sizeof(u32) * isci_fw->phy_gens_size;
+                        break;
+
+                case ISCI_FW_HDR_SASADDR:
+                        tmp++;
+                        isci_fw->sas_addrs_size = *tmp;
+                        tmp++;
+                        isci_fw->sas_addrs = (const u64 *)tmp;
+                        tmp += sizeof(u64) * isci_fw->sas_addrs_size;
+                        break;
+
+                default:
+                        pr_err("bad field in firmware binary blob\n");
+                        return -EINVAL;
+                }
+        }
+
+        pr_info("isci firmware v%u.%u loaded.\n",
+               isci_fw->version, isci_fw->subversion);
+
+        return SCI_SUCCESS;
+}
+
+static void __iomem *scu_base(struct isci_host *isci_host)
+{
+        struct pci_dev *pdev = isci_host->pdev;
+        int id = isci_host->id;
+
+        return pcim_iomap_table(pdev)[SCI_SCU_BAR * 2] + SCI_SCU_BAR_SIZE * id;
+}
+
+static void __iomem *smu_base(struct isci_host *isci_host)
+{
+        struct pci_dev *pdev = isci_host->pdev;
+        int id = isci_host->id;
+
+        return pcim_iomap_table(pdev)[SCI_SMU_BAR * 2] + SCI_SMU_BAR_SIZE * id;
+}
+
+#define SCI_MAX_TIMER_COUNT 25
+
+int isci_host_init(struct isci_host *isci_host)
+{
+        int err = 0;
+        int index = 0;
+        enum sci_status status;
+        struct scic_sds_controller *controller;
+        struct scic_sds_port *scic_port;
+        struct scic_controller_handler_methods *handlers
+                = &isci_host->scic_irq_handlers[0];
+        union scic_oem_parameters scic_oem_params;
+        union scic_user_parameters scic_user_params;
+        const struct firmware *fw = NULL;
+        struct isci_firmware *isci_fw = NULL;
+
+        INIT_LIST_HEAD(&isci_host->timer_list_struct.timers);
+        isci_timer_list_construct(
+                &isci_host->timer_list_struct,
+                SCI_MAX_TIMER_COUNT
+                );
+
+        controller = scic_controller_alloc(&isci_host->pdev->dev);
+
+        if (!controller) {
+                err = -ENOMEM;
+                dev_err(&isci_host->pdev->dev, "%s: failed (%d)\n", __func__, err);
+                goto out;
+        }
+
+        isci_host->core_controller = controller;
+        spin_lock_init(&isci_host->state_lock);
+        spin_lock_init(&isci_host->scic_lock);
+        spin_lock_init(&isci_host->queue_lock);
+
+        isci_host_change_state(isci_host, isci_starting);
+        isci_host->can_queue = ISCI_CAN_QUEUE_VAL;
+
+        status = scic_controller_construct(controller, scu_base(isci_host),
+                                           smu_base(isci_host));
+
+        if (status != SCI_SUCCESS) {
+                dev_err(&isci_host->pdev->dev,
+                        "%s: scic_controller_construct failed - status = %x\n",
+                        __func__,
+                        status);
+                err = -ENODEV;
+                goto out;
+        }
+
+        isci_host->sas_ha.dev = &isci_host->pdev->dev;
+        isci_host->sas_ha.lldd_ha = isci_host;
+
+        /*----------- SCIC controller Initialization Stuff ------------------
+         * set association host adapter struct in core controller.
+         */
+        sci_object_set_association(isci_host->core_controller,
+                                   (void *)isci_host
+                                   );
+
+        /* grab initial values stored in the controller object for OEM and USER
+         * parameters */
+        scic_oem_parameters_get(controller, &scic_oem_params);
+        scic_user_parameters_get(controller, &scic_user_params);
+
+        isci_fw = devm_kzalloc(&isci_host->pdev->dev,
+                               sizeof(struct isci_firmware),
+                               GFP_KERNEL);
+        if (!isci_fw) {
+                dev_warn(&isci_host->pdev->dev,
+                         "allocating firmware struct failed\n");
+                dev_warn(&isci_host->pdev->dev,
+                         "Default OEM configuration being used:"
+                         " 4 narrow ports, and default SAS Addresses\n");
+                goto set_default_params;
+        }
+
+        status = request_firmware(&fw, ISCI_FW_NAME, &isci_host->pdev->dev);
+        if (status) {
+                dev_warn(&isci_host->pdev->dev,
+                         "Loading firmware failed, using default values\n");
+                dev_warn(&isci_host->pdev->dev,
+                         "Default OEM configuration being used:"
+                         " 4 narrow ports, and default SAS Addresses\n");
+                goto set_default_params;
+        }
+        else {
+                status = isci_verify_firmware(fw, isci_fw);
+                if (status != SCI_SUCCESS) {
+                        dev_warn(&isci_host->pdev->dev,
+                                 "firmware verification failed\n");
+                        dev_warn(&isci_host->pdev->dev,
+                                 "Default OEM configuration being used:"
+                                 " 4 narrow ports, and default SAS "
+                                 "Addresses\n");
+                        goto set_default_params;
+                }
+
+                /* grab any OEM and USER parameters specified at module load */
+                status = isci_parse_oem_parameters(&scic_oem_params,
+                                                   isci_host->id, isci_fw);
+                if (status != SCI_SUCCESS) {
+                        dev_warn(&isci_host->pdev->dev,
+                                 "parsing firmware oem parameters failed\n");
+                        err = -EINVAL;
+                        goto out;
+                }
+
+                status = isci_parse_user_parameters(&scic_user_params,
+                                                    isci_host->id, isci_fw);
+                if (status != SCI_SUCCESS) {
+                        dev_warn(&isci_host->pdev->dev,
+                                 "%s: isci_parse_user_parameters"
+                                 " failed\n", __func__);
+                        err = -EINVAL;
+                        goto out;
+                }
+        }
+
+ set_default_params:
+
+        status = scic_oem_parameters_set(isci_host->core_controller,
+                                         &scic_oem_params
+                                         );
+
+        if (status != SCI_SUCCESS) {
+                dev_warn(&isci_host->pdev->dev,
+                         "%s: scic_oem_parameters_set failed\n",
+                         __func__);
+                err = -ENODEV;
+                goto out;
+        }
+
+
+        status = scic_user_parameters_set(isci_host->core_controller,
+                                          &scic_user_params
+                                          );
+
+        if (status != SCI_SUCCESS) {
+                dev_warn(&isci_host->pdev->dev,
+                         "%s: scic_user_parameters_set failed\n",
+                         __func__);
+                err = -ENODEV;
+                goto out;
+        }
+
+        status = scic_controller_initialize(isci_host->core_controller);
+        if (status != SCI_SUCCESS) {
+                dev_warn(&isci_host->pdev->dev,
+                         "%s: scic_controller_initialize failed -"
+                         " status = 0x%x\n",
+                         __func__, status);
+                err = -ENODEV;
+                goto out;
+        }
+
+        /* @todo: use both MSI-X interrupts, and don't do indirect
+         * calls to the handlers just register direct calls
+         */
+        if (isci_host->pdev->msix_enabled) {
+                status = scic_controller_get_handler_methods(
+                        SCIC_MSIX_INTERRUPT_TYPE,
+                        SCI_MSIX_DOUBLE_VECTOR,
+                        handlers
+                        );
+        } else {
+                status = scic_controller_get_handler_methods(
+                        SCIC_LEGACY_LINE_INTERRUPT_TYPE,
+                        0,
+                        handlers
+                        );
+        }
+
+        if (status != SCI_SUCCESS) {
+                handlers->interrupt_handler = NULL;
+                handlers->completion_handler = NULL;
+                dev_err(&isci_host->pdev->dev,
+                        "%s: scic_controller_get_handler_methods failed\n",
+                        __func__);
+        }
+
+        tasklet_init(&isci_host->completion_tasklet,
+                     isci_host_completion_routine,
+                     (unsigned long)isci_host
+                     );
+
+        INIT_LIST_HEAD(&(isci_host->mdl_struct_list));
+
+        INIT_LIST_HEAD(&isci_host->requests_to_complete);
+        INIT_LIST_HEAD(&isci_host->requests_to_abort);
+
+        /* populate mdl with dma memory. scu_mdl_allocate_coherent() */
+        err = isci_host_mdl_allocate_coherent(isci_host);
+
+        if (err)
+                goto err_out;
+
+        /*
+         * keep the pool alloc size around, will use it for a bounds checking
+         * when trying to convert virtual addresses to physical addresses
+         */
+        isci_host->dma_pool_alloc_size = sizeof(struct isci_request) +
+                                         scic_io_request_get_object_size();
+        isci_host->dma_pool = dmam_pool_create(DRV_NAME, &isci_host->pdev->dev,
+                                               isci_host->dma_pool_alloc_size,
+                                               SLAB_HWCACHE_ALIGN, 0);
+
+        if (!isci_host->dma_pool) {
+                err = -ENOMEM;
+                goto req_obj_err_out;
+        }
+
+        for (index = 0; index < SCI_MAX_PORTS; index++) {
+                isci_port_init(&isci_host->isci_ports[index],
+                               isci_host, index);
+        }
+
+        for (index = 0; index < SCI_MAX_PHYS; index++)
+                isci_phy_init(&isci_host->phys[index], isci_host, index);
+
+        /* Why are we doing this? Is this even necessary? */
+        memcpy(&isci_host->sas_addr[0], &isci_host->phys[0].sas_addr[0],
+               SAS_ADDR_SIZE);
+
+        /* Start the ports */
+        for (index = 0; index < SCI_MAX_PORTS; index++) {
+
+                scic_controller_get_port_handle(controller, index, &scic_port);
+                scic_port_start(scic_port);
+        }
+
+        goto out;
+
+/* SPB_Debug: destroy request object cache */
+ req_obj_err_out:
+/* SPB_Debug: destroy remote object cache */
+ err_out:
+/* SPB_Debug: undo controller init, construct and alloc, remove from parent
+ * controller list. */
+ out:
+        if (fw)
+                release_firmware(fw);
+        return err;
+}