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 * 2010-2015 PMC-Sierra, Inc. (aacraid@pmc-sierra.com)
10 * 2016-2017 Microsemi Corp. (aacraid@microsemi.com)
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2, or (at your option)
15 * any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; see the file COPYING. If not, write to
24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
25 *
26 * Module Name:
27 * rkt.c
28 *
29 * Abstract: Hardware miniport for Drawbridge specific hardware functions.
30 *
31 */
32
33 #include <linux/blkdev.h>
34
35 #include <scsi/scsi_host.h>
36
37 #include "aacraid.h"
38
39 #define AAC_NUM_IO_FIB_RKT (246 - AAC_NUM_MGT_FIB)
40
41 /**
42 * aac_rkt_select_comm - Select communications method
43 * @dev: Adapter
44 * @comm: communications method
45 */
46
aac_rkt_select_comm(struct aac_dev * dev,int comm)47 static int aac_rkt_select_comm(struct aac_dev *dev, int comm)
48 {
49 int retval;
50 retval = aac_rx_select_comm(dev, comm);
51 if (comm == AAC_COMM_MESSAGE) {
52 /*
53 * FIB Setup has already been done, but we can minimize the
54 * damage by at least ensuring the OS never issues more
55 * commands than we can handle. The Rocket adapters currently
56 * can only handle 246 commands and 8 AIFs at the same time,
57 * and in fact do notify us accordingly if we negotiate the
58 * FIB size. The problem that causes us to add this check is
59 * to ensure that we do not overdo it with the adapter when a
60 * hard coded FIB override is being utilized. This special
61 * case warrants this half baked, but convenient, check here.
62 */
63 if (dev->scsi_host_ptr->can_queue > AAC_NUM_IO_FIB_RKT) {
64 dev->init->r7.max_io_commands =
65 cpu_to_le32(AAC_NUM_IO_FIB_RKT + AAC_NUM_MGT_FIB);
66 dev->scsi_host_ptr->can_queue = AAC_NUM_IO_FIB_RKT;
67 }
68 }
69 return retval;
70 }
71
72 /**
73 * aac_rkt_ioremap
74 * @size: mapping resize request
75 *
76 */
aac_rkt_ioremap(struct aac_dev * dev,u32 size)77 static int aac_rkt_ioremap(struct aac_dev * dev, u32 size)
78 {
79 if (!size) {
80 iounmap(dev->regs.rkt);
81 return 0;
82 }
83 dev->base = dev->regs.rkt = ioremap(dev->base_start, size);
84 if (dev->base == NULL)
85 return -1;
86 dev->IndexRegs = &dev->regs.rkt->IndexRegs;
87 return 0;
88 }
89
90 /**
91 * aac_rkt_init - initialize an i960 based AAC card
92 * @dev: device to configure
93 *
94 * Allocate and set up resources for the i960 based AAC variants. The
95 * device_interface in the commregion will be allocated and linked
96 * to the comm region.
97 */
98
aac_rkt_init(struct aac_dev * dev)99 int aac_rkt_init(struct aac_dev *dev)
100 {
101 /*
102 * Fill in the function dispatch table.
103 */
104 dev->a_ops.adapter_ioremap = aac_rkt_ioremap;
105 dev->a_ops.adapter_comm = aac_rkt_select_comm;
106
107 return _aac_rx_init(dev);
108 }
109
