/* * 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" #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->MaxIoCommands = 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 * @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) { /* * 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); }