[SCSI] aacraid: draw line in sand, sundry cleanup and version update
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / scsi / aacraid / rkt.c
blob8cd6588a83e3be4c7b81e65af0073b899b3600dd
1 /*
2 * Adaptec AAC series RAID controller driver
3 * (c) Copyright 2001 Red Hat Inc. <alan@redhat.com>
5 * based on the old aacraid driver that is..
6 * Adaptec aacraid device driver for Linux.
8 * Copyright (c) 2000-2007 Adaptec, Inc. (aacraid@adaptec.com)
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2, or (at your option)
13 * any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; see the file COPYING. If not, write to
22 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
24 * Module Name:
25 * rkt.c
27 * Abstract: Hardware miniport for Drawbridge specific hardware functions.
31 #include <linux/blkdev.h>
33 #include <scsi/scsi_host.h>
35 #include "aacraid.h"
37 #define AAC_NUM_IO_FIB_RKT (246 - AAC_NUM_MGT_FIB)
39 /**
40 * aac_rkt_select_comm - Select communications method
41 * @dev: Adapter
42 * @comm: communications method
45 static int aac_rkt_select_comm(struct aac_dev *dev, int comm)
47 int retval;
48 retval = aac_rx_select_comm(dev, comm);
49 if (comm == AAC_COMM_MESSAGE) {
51 * FIB Setup has already been done, but we can minimize the
52 * damage by at least ensuring the OS never issues more
53 * commands than we can handle. The Rocket adapters currently
54 * can only handle 246 commands and 8 AIFs at the same time,
55 * and in fact do notify us accordingly if we negotiate the
56 * FIB size. The problem that causes us to add this check is
57 * to ensure that we do not overdo it with the adapter when a
58 * hard coded FIB override is being utilized. This special
59 * case warrants this half baked, but convenient, check here.
61 if (dev->scsi_host_ptr->can_queue > AAC_NUM_IO_FIB_RKT) {
62 dev->init->MaxIoCommands =
63 cpu_to_le32(AAC_NUM_IO_FIB_RKT + AAC_NUM_MGT_FIB);
64 dev->scsi_host_ptr->can_queue = AAC_NUM_IO_FIB_RKT;
67 return retval;
70 /**
71 * aac_rkt_ioremap
72 * @size: mapping resize request
75 static int aac_rkt_ioremap(struct aac_dev * dev, u32 size)
77 if (!size) {
78 iounmap(dev->regs.rkt);
79 return 0;
81 dev->base = dev->regs.rkt = ioremap(dev->scsi_host_ptr->base, size);
82 if (dev->base == NULL)
83 return -1;
84 dev->IndexRegs = &dev->regs.rkt->IndexRegs;
85 return 0;
88 /**
89 * aac_rkt_init - initialize an i960 based AAC card
90 * @dev: device to configure
92 * Allocate and set up resources for the i960 based AAC variants. The
93 * device_interface in the commregion will be allocated and linked
94 * to the comm region.
97 int aac_rkt_init(struct aac_dev *dev)
100 * Fill in the function dispatch table.
102 dev->a_ops.adapter_ioremap = aac_rkt_ioremap;
103 dev->a_ops.adapter_comm = aac_rkt_select_comm;
105 return _aac_rx_init(dev);