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/*
* Adaptec AAC series RAID controller driver
* (c) Copyright 2001 Red Hat Inc. <alan@redhat.com>
*
* based on the old aacraid driver that is..
* Adaptec aacraid device driver for Linux.
*
* Copyright (c) 2000 Adaptec, Inc. (aacraid@adaptec.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* 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; see the file COPYING. If not, write to
* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
*
* Module Name:
* rkt.c
*
* Abstract: Hardware miniport for Drawbridge specific hardware functions.
*
*/
#include <linux/blkdev.h>
#include <scsi/scsi_host.h>
#include "aacraid.h"
/**
* aac_rkt_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->scsi_host_ptr->base, 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)
{
int retval;
extern int _aac_rx_init(struct aac_dev *dev);
extern void aac_rx_start_adapter(struct aac_dev *dev);
/*
* Fill in the function dispatch table.
*/
dev->a_ops.adapter_ioremap = aac_rkt_ioremap;
retval = _aac_rx_init(dev);
if (retval)
return retval;
if (dev->new_comm_interface) {
/*
* 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 > (246 - AAC_NUM_MGT_FIB)) {
dev->init->MaxIoCommands = cpu_to_le32(246);
dev->scsi_host_ptr->can_queue = 246 - AAC_NUM_MGT_FIB;
}
}
/*
* Tell the adapter that all is configured, and it can start
* accepting requests
*/
aac_rx_start_adapter(dev);
return 0;
}
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