107 lines
3.0 KiB
C
107 lines
3.0 KiB
C
/*
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* Adaptec AAC series RAID controller driver
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* (c) Copyright 2001 Red Hat Inc. <alan@redhat.com>
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*
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* based on the old aacraid driver that is..
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* Adaptec aacraid device driver for Linux.
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*
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* Copyright (c) 2000 Adaptec, Inc. (aacraid@adaptec.com)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; see the file COPYING. If not, write to
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* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* Module Name:
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* rkt.c
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*
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* Abstract: Hardware miniport for Drawbridge specific hardware functions.
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*
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*/
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#include <linux/blkdev.h>
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#include <scsi/scsi_host.h>
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#include "aacraid.h"
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#define AAC_NUM_IO_FIB_RKT (246 - AAC_NUM_MGT_FIB)
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/**
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* aac_rkt_select_comm - Select communications method
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* @dev: Adapter
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* @comm: communications method
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*/
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static int aac_rkt_select_comm(struct aac_dev *dev, int comm)
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{
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int retval;
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retval = aac_rx_select_comm(dev, comm);
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if (comm == AAC_COMM_MESSAGE) {
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/*
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* FIB Setup has already been done, but we can minimize the
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* damage by at least ensuring the OS never issues more
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* commands than we can handle. The Rocket adapters currently
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* can only handle 246 commands and 8 AIFs at the same time,
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* and in fact do notify us accordingly if we negotiate the
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* FIB size. The problem that causes us to add this check is
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* to ensure that we do not overdo it with the adapter when a
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* hard coded FIB override is being utilized. This special
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* case warrants this half baked, but convenient, check here.
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*/
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if (dev->scsi_host_ptr->can_queue > AAC_NUM_IO_FIB_RKT) {
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dev->init->MaxIoCommands =
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cpu_to_le32(AAC_NUM_IO_FIB_RKT + AAC_NUM_MGT_FIB);
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dev->scsi_host_ptr->can_queue = AAC_NUM_IO_FIB_RKT;
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}
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}
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return retval;
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}
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/**
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* aac_rkt_ioremap
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* @size: mapping resize request
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*
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*/
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static int aac_rkt_ioremap(struct aac_dev * dev, u32 size)
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{
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if (!size) {
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iounmap(dev->regs.rkt);
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return 0;
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}
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dev->base = dev->regs.rkt = ioremap(dev->scsi_host_ptr->base, size);
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if (dev->base == NULL)
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return -1;
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dev->IndexRegs = &dev->regs.rkt->IndexRegs;
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return 0;
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}
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/**
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* aac_rkt_init - initialize an i960 based AAC card
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* @dev: device to configure
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*
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* Allocate and set up resources for the i960 based AAC variants. The
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* device_interface in the commregion will be allocated and linked
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* to the comm region.
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*/
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int aac_rkt_init(struct aac_dev *dev)
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{
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/*
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* Fill in the function dispatch table.
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*/
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dev->a_ops.adapter_ioremap = aac_rkt_ioremap;
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dev->a_ops.adapter_comm = aac_rkt_select_comm;
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return _aac_rx_init(dev);
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}
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