/*-
 * SPDX-License-Identifier: BSD-2-Clause
 *
 * 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.
 *
 * 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 <sys/cdefs.h>
#include <dev/isci/isci.h>

#include <sys/sysctl.h>

#include <dev/isci/scil/scif_controller.h>
#include <dev/isci/scil/scic_phy.h>

static int
isci_sysctl_coalesce_timeout(SYSCTL_HANDLER_ARGS)
{
        struct isci_softc *isci = (struct isci_softc *)arg1;
        int error = sysctl_handle_int(oidp, &isci->coalesce_timeout, 0, req);
        int i;

        if (error)
                return (error);

        for (i = 0; i < isci->controller_count; i++)
                scif_controller_set_interrupt_coalescence(
                    isci->controllers[i].scif_controller_handle,
                    isci->coalesce_number, isci->coalesce_timeout);

        return (0);
}

static int
isci_sysctl_coalesce_number(SYSCTL_HANDLER_ARGS)
{
        struct isci_softc *isci = (struct isci_softc *)arg1;
        int error = sysctl_handle_int(oidp, &isci->coalesce_number, 0, req);
        int i;

        if (error)
                return (error);

        for (i = 0; i < isci->controller_count; i++)
                scif_controller_set_interrupt_coalescence(
                    isci->controllers[i].scif_controller_handle,
                    isci->coalesce_number, isci->coalesce_timeout);

        return (0);
}

static void
isci_sysctl_reset_remote_devices(struct ISCI_CONTROLLER *controller,
    uint32_t remote_devices_to_be_reset)
{
        uint32_t i = 0;

        while (remote_devices_to_be_reset != 0) {
                if (remote_devices_to_be_reset & 0x1) {
                        struct ISCI_REMOTE_DEVICE *remote_device =
                                controller->remote_device[i];

                        if (remote_device != NULL) {
                                mtx_lock(&controller->lock);
                                isci_remote_device_reset(remote_device, NULL);
                                mtx_unlock(&controller->lock);
                        }
                }
                remote_devices_to_be_reset >>= 1;
                i++;
        }
}

static int
isci_sysctl_reset_remote_device_on_controller0(SYSCTL_HANDLER_ARGS)
{
        struct isci_softc *isci = (struct isci_softc *)arg1;
        uint32_t remote_devices_to_be_reset = 0;
        struct ISCI_CONTROLLER *controller = &isci->controllers[0];
        int error = sysctl_handle_int(oidp, &remote_devices_to_be_reset, 0, req);

        if (error || remote_devices_to_be_reset == 0)
                return (error);

        isci_sysctl_reset_remote_devices(controller, remote_devices_to_be_reset);

        return (0);
}

static int
isci_sysctl_reset_remote_device_on_controller1(SYSCTL_HANDLER_ARGS)
{
        struct isci_softc *isci = (struct isci_softc *)arg1;
        uint32_t remote_devices_to_be_reset = 0;
        struct ISCI_CONTROLLER *controller = &isci->controllers[1];
        int error =
            sysctl_handle_int(oidp, &remote_devices_to_be_reset, 0, req);

        if (error || remote_devices_to_be_reset == 0)
                return (error);

        isci_sysctl_reset_remote_devices(controller,
            remote_devices_to_be_reset);

        return (0);
}

static void
isci_sysctl_stop(struct ISCI_CONTROLLER *controller, uint32_t phy_to_be_stopped)
{
        SCI_PHY_HANDLE_T phy_handle = NULL;

        scic_controller_get_phy_handle(
            scif_controller_get_scic_handle(controller->scif_controller_handle),
            phy_to_be_stopped, &phy_handle);

        scic_phy_stop(phy_handle);
}

static int
isci_sysctl_stop_phy(SYSCTL_HANDLER_ARGS)
{
        struct isci_softc *isci = (struct isci_softc *)arg1;
        uint32_t phy_to_be_stopped = 0xff;
        uint32_t controller_index, phy_index;
        int error = sysctl_handle_int(oidp, &phy_to_be_stopped, 0, req);

        controller_index = phy_to_be_stopped / SCI_MAX_PHYS;
        phy_index = phy_to_be_stopped % SCI_MAX_PHYS;

        if(error || controller_index >= isci->controller_count)
                return (error);

        isci_sysctl_stop(&isci->controllers[controller_index], phy_index);

        return (0);
}

static void
isci_sysctl_start(struct ISCI_CONTROLLER *controller,
    uint32_t phy_to_be_started)
{
        SCI_PHY_HANDLE_T phy_handle = NULL;

        scic_controller_get_phy_handle(
            scif_controller_get_scic_handle(controller->scif_controller_handle),
            phy_to_be_started, &phy_handle);

        scic_phy_start(phy_handle);
}

static int
isci_sysctl_start_phy(SYSCTL_HANDLER_ARGS)
{
        struct isci_softc *isci = (struct isci_softc *)arg1;
        uint32_t phy_to_be_started = 0xff;
        uint32_t controller_index, phy_index;
        int error = sysctl_handle_int(oidp, &phy_to_be_started, 0, req);

        controller_index = phy_to_be_started / SCI_MAX_PHYS;
        phy_index = phy_to_be_started % SCI_MAX_PHYS;

        if(error || controller_index >= isci->controller_count)
                return error;

        isci_sysctl_start(&isci->controllers[controller_index], phy_index);

        return 0;
}

static int
isci_sysctl_log_frozen_lun_masks(SYSCTL_HANDLER_ARGS)
{
        struct isci_softc       *isci = (struct isci_softc *)arg1;
        struct ISCI_REMOTE_DEVICE *device;
        int32_t                 log_frozen_devices = 0;
        int                     error, i, j;

        error = sysctl_handle_int(oidp, &log_frozen_devices, 0, req);

        if (error || log_frozen_devices == 0)
                return (error);

        for (i = 0; i < isci->controller_count; i++) {
                for (j = 0; j < SCI_MAX_REMOTE_DEVICES; j++) {
                        device = isci->controllers[i].remote_device[j];

                        if (device == NULL)
                                continue;

                        device_printf(isci->device,
                            "controller %d device %3d frozen_lun_mask 0x%02x\n",
                            i, j, device->frozen_lun_mask);
                }
        }

        return (0);
}

static int
isci_sysctl_fail_on_task_timeout(SYSCTL_HANDLER_ARGS)
{
        struct isci_softc       *isci = (struct isci_softc *)arg1;
        int32_t                 fail_on_timeout;
        int                     error, i;

        fail_on_timeout = isci->controllers[0].fail_on_task_timeout;
        error = sysctl_handle_int(oidp, &fail_on_timeout, 0, req);

        if (error || req->newptr == NULL)
                return (error);

        for (i = 0; i < isci->controller_count; i++)
                isci->controllers[i].fail_on_task_timeout = fail_on_timeout;

        return (0);
}

void isci_sysctl_initialize(struct isci_softc *isci)
{
        struct sysctl_ctx_list *sysctl_ctx = device_get_sysctl_ctx(isci->device);
        struct sysctl_oid *sysctl_tree = device_get_sysctl_tree(isci->device);

        SYSCTL_ADD_PROC(sysctl_ctx, SYSCTL_CHILDREN(sysctl_tree), OID_AUTO,
            "coalesce_timeout", CTLTYPE_UINT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
            isci, 0, isci_sysctl_coalesce_timeout, "IU",
            "Interrupt coalescing timeout (in microseconds)");

        SYSCTL_ADD_PROC(sysctl_ctx, SYSCTL_CHILDREN(sysctl_tree), OID_AUTO,
            "coalesce_number", CTLTYPE_UINT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
            isci, 0, isci_sysctl_coalesce_number, "IU",
            "Interrupt coalescing number");

        SYSCTL_ADD_PROC(sysctl_ctx, SYSCTL_CHILDREN(sysctl_tree), OID_AUTO,
            "reset_remote_device_on_controller0",
            CTLTYPE_UINT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, isci, 0,
            isci_sysctl_reset_remote_device_on_controller0, "IU",
            "Reset remote device on controller 0");

        SYSCTL_ADD_PROC(sysctl_ctx, SYSCTL_CHILDREN(sysctl_tree), OID_AUTO,
            "reset_remote_device_on_controller1",
            CTLTYPE_UINT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
            isci, 0, isci_sysctl_reset_remote_device_on_controller1, "IU",
            "Reset remote device on controller 1");

        SYSCTL_ADD_PROC(sysctl_ctx, SYSCTL_CHILDREN(sysctl_tree), OID_AUTO,
            "stop_phy", CTLTYPE_UINT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, isci,
            0, isci_sysctl_stop_phy, "IU", "Stop PHY on a controller");

        SYSCTL_ADD_PROC(sysctl_ctx, SYSCTL_CHILDREN(sysctl_tree), OID_AUTO,
            "start_phy", CTLTYPE_UINT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, isci,
            0, isci_sysctl_start_phy, "IU", "Start PHY on a controller");

        SYSCTL_ADD_PROC(sysctl_ctx, SYSCTL_CHILDREN(sysctl_tree), OID_AUTO,
            "log_frozen_lun_masks",
            CTLTYPE_UINT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, isci, 0,
            isci_sysctl_log_frozen_lun_masks, "IU",
            "Log frozen lun masks to kernel log");

        SYSCTL_ADD_PROC(sysctl_ctx, SYSCTL_CHILDREN(sysctl_tree), OID_AUTO,
            "fail_on_task_timeout",
            CTLTYPE_UINT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, isci, 0,
            isci_sysctl_fail_on_task_timeout, "IU",
            "Fail a command that has encountered a task management timeout");
}