Commit | Line | Data |
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c82ee6d3 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 LT |
2 | /* |
3 | * Adaptec AAC series RAID controller driver | |
fa195afe | 4 | * (c) Copyright 2001 Red Hat Inc. |
1da177e4 LT |
5 | * |
6 | * based on the old aacraid driver that is.. | |
7 | * Adaptec aacraid device driver for Linux. | |
8 | * | |
e8b12f0f | 9 | * Copyright (c) 2000-2010 Adaptec, Inc. |
f4babba0 RAR |
10 | * 2010-2015 PMC-Sierra, Inc. (aacraid@pmc-sierra.com) |
11 | * 2016-2017 Microsemi Corp. (aacraid@microsemi.com) | |
1da177e4 | 12 | * |
1da177e4 LT |
13 | * Module Name: |
14 | * rkt.c | |
15 | * | |
16 | * Abstract: Hardware miniport for Drawbridge specific hardware functions. | |
1da177e4 LT |
17 | */ |
18 | ||
1da177e4 | 19 | #include <linux/blkdev.h> |
1da177e4 LT |
20 | |
21 | #include <scsi/scsi_host.h> | |
22 | ||
23 | #include "aacraid.h" | |
24 | ||
28713324 MH |
25 | #define AAC_NUM_IO_FIB_RKT (246 - AAC_NUM_MGT_FIB) |
26 | ||
27 | /** | |
28 | * aac_rkt_select_comm - Select communications method | |
29 | * @dev: Adapter | |
30 | * @comm: communications method | |
31 | */ | |
32 | ||
33 | static int aac_rkt_select_comm(struct aac_dev *dev, int comm) | |
34 | { | |
35 | int retval; | |
28713324 MH |
36 | retval = aac_rx_select_comm(dev, comm); |
37 | if (comm == AAC_COMM_MESSAGE) { | |
38 | /* | |
39 | * FIB Setup has already been done, but we can minimize the | |
40 | * damage by at least ensuring the OS never issues more | |
41 | * commands than we can handle. The Rocket adapters currently | |
42 | * can only handle 246 commands and 8 AIFs at the same time, | |
43 | * and in fact do notify us accordingly if we negotiate the | |
44 | * FIB size. The problem that causes us to add this check is | |
45 | * to ensure that we do not overdo it with the adapter when a | |
46 | * hard coded FIB override is being utilized. This special | |
47 | * case warrants this half baked, but convenient, check here. | |
48 | */ | |
49 | if (dev->scsi_host_ptr->can_queue > AAC_NUM_IO_FIB_RKT) { | |
d1ef4da8 | 50 | dev->init->r7.max_io_commands = |
28713324 MH |
51 | cpu_to_le32(AAC_NUM_IO_FIB_RKT + AAC_NUM_MGT_FIB); |
52 | dev->scsi_host_ptr->can_queue = AAC_NUM_IO_FIB_RKT; | |
53 | } | |
54 | } | |
55 | return retval; | |
56 | } | |
57 | ||
1da177e4 | 58 | /** |
76a7f8fd MH |
59 | * aac_rkt_ioremap |
60 | * @size: mapping resize request | |
1da177e4 | 61 | * |
1da177e4 | 62 | */ |
76a7f8fd | 63 | static int aac_rkt_ioremap(struct aac_dev * dev, u32 size) |
1da177e4 | 64 | { |
76a7f8fd MH |
65 | if (!size) { |
66 | iounmap(dev->regs.rkt); | |
67 | return 0; | |
1da177e4 | 68 | } |
ff08784b | 69 | dev->base = dev->regs.rkt = ioremap(dev->base_start, size); |
76a7f8fd | 70 | if (dev->base == NULL) |
1da177e4 | 71 | return -1; |
76a7f8fd | 72 | dev->IndexRegs = &dev->regs.rkt->IndexRegs; |
8c23cd74 MH |
73 | return 0; |
74 | } | |
75 | ||
1da177e4 LT |
76 | /** |
77 | * aac_rkt_init - initialize an i960 based AAC card | |
78 | * @dev: device to configure | |
79 | * | |
80 | * Allocate and set up resources for the i960 based AAC variants. The | |
81 | * device_interface in the commregion will be allocated and linked | |
82 | * to the comm region. | |
83 | */ | |
84 | ||
85 | int aac_rkt_init(struct aac_dev *dev) | |
86 | { | |
1da177e4 LT |
87 | /* |
88 | * Fill in the function dispatch table. | |
89 | */ | |
76a7f8fd | 90 | dev->a_ops.adapter_ioremap = aac_rkt_ioremap; |
28713324 | 91 | dev->a_ops.adapter_comm = aac_rkt_select_comm; |
bd1aac80 | 92 | |
28713324 | 93 | return _aac_rx_init(dev); |
1da177e4 | 94 | } |