// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * IBM ASM Service Processor Device Driver
 *
 * Copyright (C) IBM Corporation, 2004
 *
 * Author: Max Asböck <amax@us.ibm.com>
 */

#include "ibmasm.h"
#include "lowlevel.h"
#include "i2o.h"
#include "dot_command.h"
#include "remote.h"

static struct i2o_header header = I2O_HEADER_TEMPLATE;


int ibmasm_send_i2o_message(struct service_processor *sp)
{
        u32 mfa;
        size_t command_size;
        struct i2o_message *message;
        struct command *command = sp->current_command;

        command_size = get_dot_command_size(command->buffer);
        if (command_size > command->buffer_size)
                return 1;
        if (command_size > I2O_COMMAND_SIZE)
                command_size = I2O_COMMAND_SIZE;

        mfa = get_mfa_inbound(sp->base_address);
        if (!mfa)
                return 1;

        header.message_size = outgoing_message_size((unsigned int)command_size);
        message = get_i2o_message(sp->base_address, mfa);

        memcpy_toio(&message->header, &header, sizeof(struct i2o_header));
        memcpy_toio(&message->data, command->buffer, command_size);

        set_mfa_inbound(sp->base_address, mfa);

        return 0;
}

irqreturn_t ibmasm_interrupt_handler(int irq, void * dev_id)
{
        u32     mfa;
        struct service_processor *sp = (struct service_processor *)dev_id;
        void __iomem *base_address = sp->base_address;
        char tsbuf[32];

        if (!sp_interrupt_pending(base_address))
                return IRQ_NONE;

        dbg("respond to interrupt at %s\n", get_timestamp(tsbuf));

        if (mouse_interrupt_pending(sp)) {
                ibmasm_handle_mouse_interrupt(sp);
                clear_mouse_interrupt(sp);
        }

        mfa = get_mfa_outbound(base_address);
        if (valid_mfa(mfa)) {
                struct i2o_message *msg = get_i2o_message(base_address, mfa);
                ibmasm_receive_message(sp, &msg->data, incoming_data_size(msg));
        } else
                dbg("didn't get a valid MFA\n");

        set_mfa_outbound(base_address, mfa);
        dbg("finished interrupt at   %s\n", get_timestamp(tsbuf));

        return IRQ_HANDLED;
}