tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Adaptec AAC series RAID controller driver
3 * (c) Copyright 2001 Red Hat Inc. <alan@redhat.com>
4 *
5 * based on the old aacraid driver that is..
6 * Adaptec aacraid device driver for Linux.
7 *
8 * Copyright (c) 2000 Adaptec, Inc. (aacraid@adaptec.com)
9 *
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.
14 *
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.
19 *
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.
23 *
24 * Module Name:
25 * rkt.c
26 *
27 * Abstract: Hardware miniport for Drawbridge specific hardware functions.
28 *
29 */
30
31#include <linux/blkdev.h>
32
33#include <scsi/scsi_host.h>
34
35#include "aacraid.h"
36
37#define AAC_NUM_IO_FIB_RKT (246 - AAC_NUM_MGT_FIB)
38
39/**
40 * aac_rkt_select_comm - Select communications method
41 * @dev: Adapter
42 * @comm: communications method
43 */
44
45static int aac_rkt_select_comm(struct aac_dev *dev, int comm)
46{
47 int retval;
48 extern int aac_rx_select_comm(struct aac_dev *dev, int comm);
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->scsi_host_ptr->base, 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 extern int _aac_rx_init(struct aac_dev *dev);
101
102 /*
103 * Fill in the function dispatch table.
104 */
105 dev->a_ops.adapter_ioremap = aac_rkt_ioremap;
106 dev->a_ops.adapter_comm = aac_rkt_select_comm;
107
108 return _aac_rx_init(dev);
109}