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1da177e4 LT |
1 | /* |
2 | * Adaptec AAC series RAID controller driver | |
fa195afe | 3 | * (c) Copyright 2001 Red Hat Inc. |
1da177e4 LT |
4 | * |
5 | * based on the old aacraid driver that is.. | |
6 | * Adaptec aacraid device driver for Linux. | |
7 | * | |
c835e372 | 8 | * Copyright (c) 2000-2007 Adaptec, Inc. (aacraid@adaptec.com) |
1da177e4 LT |
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 | ||
1da177e4 | 31 | #include <linux/blkdev.h> |
1da177e4 LT |
32 | |
33 | #include <scsi/scsi_host.h> | |
34 | ||
35 | #include "aacraid.h" | |
36 | ||
28713324 MH |
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 | ||
45 | static int aac_rkt_select_comm(struct aac_dev *dev, int comm) | |
46 | { | |
47 | int retval; | |
28713324 MH |
48 | retval = aac_rx_select_comm(dev, comm); |
49 | if (comm == AAC_COMM_MESSAGE) { | |
50 | /* | |
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. | |
60 | */ | |
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; | |
65 | } | |
66 | } | |
67 | return retval; | |
68 | } | |
69 | ||
1da177e4 | 70 | /** |
76a7f8fd MH |
71 | * aac_rkt_ioremap |
72 | * @size: mapping resize request | |
1da177e4 | 73 | * |
1da177e4 | 74 | */ |
76a7f8fd | 75 | static int aac_rkt_ioremap(struct aac_dev * dev, u32 size) |
1da177e4 | 76 | { |
76a7f8fd MH |
77 | if (!size) { |
78 | iounmap(dev->regs.rkt); | |
79 | return 0; | |
1da177e4 | 80 | } |
76a7f8fd MH |
81 | dev->base = dev->regs.rkt = ioremap(dev->scsi_host_ptr->base, size); |
82 | if (dev->base == NULL) | |
1da177e4 | 83 | return -1; |
76a7f8fd | 84 | dev->IndexRegs = &dev->regs.rkt->IndexRegs; |
8c23cd74 MH |
85 | return 0; |
86 | } | |
87 | ||
1da177e4 LT |
88 | /** |
89 | * aac_rkt_init - initialize an i960 based AAC card | |
90 | * @dev: device to configure | |
91 | * | |
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. | |
95 | */ | |
96 | ||
97 | int aac_rkt_init(struct aac_dev *dev) | |
98 | { | |
1da177e4 LT |
99 | /* |
100 | * Fill in the function dispatch table. | |
101 | */ | |
76a7f8fd | 102 | dev->a_ops.adapter_ioremap = aac_rkt_ioremap; |
28713324 | 103 | dev->a_ops.adapter_comm = aac_rkt_select_comm; |
bd1aac80 | 104 | |
28713324 | 105 | return _aac_rx_init(dev); |
1da177e4 | 106 | } |