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76a7f8fdc0
Received from Mark Salyzyn: The only real difference between the rkt and rx platform modules is the offset of the message registers. This patch recognizes this similarity and simplifies the driver to reduce it's code footprint and to improve maintainability by reducing the code duplication. Visibly, the 'rkt.c' portion of this patch looks more complicated than it really is. View it as retaining the rkt-only specifics of the interface. Signed-off-by: Mark Haverkamp <markh@osdl.org> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
102 lines
2.9 KiB
C
102 lines
2.9 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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/**
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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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int retval;
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extern int _aac_rx_init(struct aac_dev *dev);
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extern void aac_rx_start_adapter(struct aac_dev *dev);
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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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retval = _aac_rx_init(dev);
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if (retval)
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return retval;
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if (dev->new_comm_interface) {
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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 > (246 - AAC_NUM_MGT_FIB)) {
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dev->init->MaxIoCommands = cpu_to_le32(246);
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dev->scsi_host_ptr->can_queue = 246 - AAC_NUM_MGT_FIB;
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}
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}
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/*
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* Tell the adapter that all is configured, and it can start
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* accepting requests
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*/
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aac_rx_start_adapter(dev);
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return 0;
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}
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