1/*
2 *	Adaptec AAC series RAID controller driver
3 *	(c) Copyright 2001 Red Hat Inc.
4 *
5 * based on the old aacraid driver that is..
6 * Adaptec aacraid device driver for Linux.
7 *
8 * Copyright (c) 2000-2010 Adaptec, Inc.
9 *               2010 PMC-Sierra, Inc. (aacraid@pmc-sierra.com)
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2, or (at your option)
14 * any later version.
15 *
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
19 * GNU General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with this program; see the file COPYING.  If not, write to
23 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
24 *
25 * Module Name:
26 *  rkt.c
27 *
28 * Abstract: Hardware miniport for Drawbridge specific hardware functions.
29 *
30 */
31
32#include <linux/blkdev.h>
33
34#include <scsi/scsi_host.h>
35
36#include "aacraid.h"
37
38#define AAC_NUM_IO_FIB_RKT      (246 - AAC_NUM_MGT_FIB)
39
40/**
41 *	aac_rkt_select_comm	-	Select communications method
42 *	@dev: Adapter
43 *	@comm: communications method
44 */
45
46static int aac_rkt_select_comm(struct aac_dev *dev, int comm)
47{
48	int retval;
49	retval = aac_rx_select_comm(dev, comm);
50	if (comm == AAC_COMM_MESSAGE) {
51		/*
52		 * FIB Setup has already been done, but we can minimize the
53		 * damage by at least ensuring the OS never issues more
54		 * commands than we can handle. The Rocket adapters currently
55		 * can only handle 246 commands and 8 AIFs at the same time,
56		 * and in fact do notify us accordingly if we negotiate the
57		 * FIB size. The problem that causes us to add this check is
58		 * to ensure that we do not overdo it with the adapter when a
59		 * hard coded FIB override is being utilized. This special
60		 * case warrants this half baked, but convenient, check here.
61		 */
62		if (dev->scsi_host_ptr->can_queue > AAC_NUM_IO_FIB_RKT) {
63			dev->init->MaxIoCommands =
64				cpu_to_le32(AAC_NUM_IO_FIB_RKT + AAC_NUM_MGT_FIB);
65			dev->scsi_host_ptr->can_queue = AAC_NUM_IO_FIB_RKT;
66		}
67	}
68	return retval;
69}
70
71/**
72 *	aac_rkt_ioremap
73 *	@size: mapping resize request
74 *
75 */
76static int aac_rkt_ioremap(struct aac_dev * dev, u32 size)
77{
78	if (!size) {
79		iounmap(dev->regs.rkt);
80		return 0;
81	}
82	dev->base = dev->regs.rkt = ioremap(dev->base_start, size);
83	if (dev->base == NULL)
84		return -1;
85	dev->IndexRegs = &dev->regs.rkt->IndexRegs;
86	return 0;
87}
88
89/**
90 *	aac_rkt_init	-	initialize an i960 based AAC card
91 *	@dev: device to configure
92 *
93 *	Allocate and set up resources for the i960 based AAC variants. The
94 *	device_interface in the commregion will be allocated and linked
95 *	to the comm region.
96 */
97
98int aac_rkt_init(struct aac_dev *dev)
99{
100	/*
101	 *	Fill in the function dispatch table.
102	 */
103	dev->a_ops.adapter_ioremap = aac_rkt_ioremap;
104	dev->a_ops.adapter_comm = aac_rkt_select_comm;
105
106	return _aac_rx_init(dev);
107}
108