// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *      Adaptec AAC series RAID controller driver
 *      (c) Copyright 2001 Red Hat Inc.
 *
 * based on the old aacraid driver that is..
 * Adaptec aacraid device driver for Linux.
 *
 * Copyright (c) 2000-2010 Adaptec, Inc.
 *               2010-2015 PMC-Sierra, Inc. (aacraid@pmc-sierra.com)
 *               2016-2017 Microsemi Corp. (aacraid@microsemi.com)
 *
 * Module Name:
 *  rkt.c
 *
 * Abstract: Hardware miniport for Drawbridge specific hardware functions.
 */

#include <linux/blkdev.h>

#include <scsi/scsi_host.h>

#include "aacraid.h"

#define AAC_NUM_IO_FIB_RKT      (246 - AAC_NUM_MGT_FIB)

/**
 *      aac_rkt_select_comm     -       Select communications method
 *      @dev: Adapter
 *      @comm: communications method
 */

static int aac_rkt_select_comm(struct aac_dev *dev, int comm)
{
        int retval;
        retval = aac_rx_select_comm(dev, comm);
        if (comm == AAC_COMM_MESSAGE) {
                /*
                 * FIB Setup has already been done, but we can minimize the
                 * damage by at least ensuring the OS never issues more
                 * commands than we can handle. The Rocket adapters currently
                 * can only handle 246 commands and 8 AIFs at the same time,
                 * and in fact do notify us accordingly if we negotiate the
                 * FIB size. The problem that causes us to add this check is
                 * to ensure that we do not overdo it with the adapter when a
                 * hard coded FIB override is being utilized. This special
                 * case warrants this half baked, but convenient, check here.
                 */
                if (dev->scsi_host_ptr->can_queue > AAC_NUM_IO_FIB_RKT) {
                        dev->init->r7.max_io_commands =
                                cpu_to_le32(AAC_NUM_IO_FIB_RKT + AAC_NUM_MGT_FIB);
                        dev->scsi_host_ptr->can_queue = AAC_NUM_IO_FIB_RKT;
                }
        }
        return retval;
}

/**
 *      aac_rkt_ioremap
 *      @dev: device to ioremap
 *      @size: mapping resize request
 *
 */
static int aac_rkt_ioremap(struct aac_dev * dev, u32 size)
{
        if (!size) {
                iounmap(dev->regs.rkt);
                return 0;
        }
        dev->base = dev->regs.rkt = ioremap(dev->base_start, size);
        if (dev->base == NULL)
                return -1;
        dev->IndexRegs = &dev->regs.rkt->IndexRegs;
        return 0;
}

/**
 *      aac_rkt_init    -       initialize an i960 based AAC card
 *      @dev: device to configure
 *
 *      Allocate and set up resources for the i960 based AAC variants. The
 *      device_interface in the commregion will be allocated and linked
 *      to the comm region.
 */

int aac_rkt_init(struct aac_dev *dev)
{
        /*
         *      Fill in the function dispatch table.
         */
        dev->a_ops.adapter_ioremap = aac_rkt_ioremap;
        dev->a_ops.adapter_comm = aac_rkt_select_comm;

        return _aac_rx_init(dev);
}