1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-or-later
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Adaptec AAC series RAID controller driver
4*4882a593Smuzhiyun * (c) Copyright 2001 Red Hat Inc.
5*4882a593Smuzhiyun *
6*4882a593Smuzhiyun * based on the old aacraid driver that is..
7*4882a593Smuzhiyun * Adaptec aacraid device driver for Linux.
8*4882a593Smuzhiyun *
9*4882a593Smuzhiyun * Copyright (c) 2000-2010 Adaptec, Inc.
10*4882a593Smuzhiyun * 2010-2015 PMC-Sierra, Inc. (aacraid@pmc-sierra.com)
11*4882a593Smuzhiyun * 2016-2017 Microsemi Corp. (aacraid@microsemi.com)
12*4882a593Smuzhiyun *
13*4882a593Smuzhiyun * Module Name:
14*4882a593Smuzhiyun * rkt.c
15*4882a593Smuzhiyun *
16*4882a593Smuzhiyun * Abstract: Hardware miniport for Drawbridge specific hardware functions.
17*4882a593Smuzhiyun */
18*4882a593Smuzhiyun
19*4882a593Smuzhiyun #include <linux/blkdev.h>
20*4882a593Smuzhiyun
21*4882a593Smuzhiyun #include <scsi/scsi_host.h>
22*4882a593Smuzhiyun
23*4882a593Smuzhiyun #include "aacraid.h"
24*4882a593Smuzhiyun
25*4882a593Smuzhiyun #define AAC_NUM_IO_FIB_RKT (246 - AAC_NUM_MGT_FIB)
26*4882a593Smuzhiyun
27*4882a593Smuzhiyun /**
28*4882a593Smuzhiyun * aac_rkt_select_comm - Select communications method
29*4882a593Smuzhiyun * @dev: Adapter
30*4882a593Smuzhiyun * @comm: communications method
31*4882a593Smuzhiyun */
32*4882a593Smuzhiyun
aac_rkt_select_comm(struct aac_dev * dev,int comm)33*4882a593Smuzhiyun static int aac_rkt_select_comm(struct aac_dev *dev, int comm)
34*4882a593Smuzhiyun {
35*4882a593Smuzhiyun int retval;
36*4882a593Smuzhiyun retval = aac_rx_select_comm(dev, comm);
37*4882a593Smuzhiyun if (comm == AAC_COMM_MESSAGE) {
38*4882a593Smuzhiyun /*
39*4882a593Smuzhiyun * FIB Setup has already been done, but we can minimize the
40*4882a593Smuzhiyun * damage by at least ensuring the OS never issues more
41*4882a593Smuzhiyun * commands than we can handle. The Rocket adapters currently
42*4882a593Smuzhiyun * can only handle 246 commands and 8 AIFs at the same time,
43*4882a593Smuzhiyun * and in fact do notify us accordingly if we negotiate the
44*4882a593Smuzhiyun * FIB size. The problem that causes us to add this check is
45*4882a593Smuzhiyun * to ensure that we do not overdo it with the adapter when a
46*4882a593Smuzhiyun * hard coded FIB override is being utilized. This special
47*4882a593Smuzhiyun * case warrants this half baked, but convenient, check here.
48*4882a593Smuzhiyun */
49*4882a593Smuzhiyun if (dev->scsi_host_ptr->can_queue > AAC_NUM_IO_FIB_RKT) {
50*4882a593Smuzhiyun dev->init->r7.max_io_commands =
51*4882a593Smuzhiyun cpu_to_le32(AAC_NUM_IO_FIB_RKT + AAC_NUM_MGT_FIB);
52*4882a593Smuzhiyun dev->scsi_host_ptr->can_queue = AAC_NUM_IO_FIB_RKT;
53*4882a593Smuzhiyun }
54*4882a593Smuzhiyun }
55*4882a593Smuzhiyun return retval;
56*4882a593Smuzhiyun }
57*4882a593Smuzhiyun
58*4882a593Smuzhiyun /**
59*4882a593Smuzhiyun * aac_rkt_ioremap
60*4882a593Smuzhiyun * @dev: device to ioremap
61*4882a593Smuzhiyun * @size: mapping resize request
62*4882a593Smuzhiyun *
63*4882a593Smuzhiyun */
aac_rkt_ioremap(struct aac_dev * dev,u32 size)64*4882a593Smuzhiyun static int aac_rkt_ioremap(struct aac_dev * dev, u32 size)
65*4882a593Smuzhiyun {
66*4882a593Smuzhiyun if (!size) {
67*4882a593Smuzhiyun iounmap(dev->regs.rkt);
68*4882a593Smuzhiyun return 0;
69*4882a593Smuzhiyun }
70*4882a593Smuzhiyun dev->base = dev->regs.rkt = ioremap(dev->base_start, size);
71*4882a593Smuzhiyun if (dev->base == NULL)
72*4882a593Smuzhiyun return -1;
73*4882a593Smuzhiyun dev->IndexRegs = &dev->regs.rkt->IndexRegs;
74*4882a593Smuzhiyun return 0;
75*4882a593Smuzhiyun }
76*4882a593Smuzhiyun
77*4882a593Smuzhiyun /**
78*4882a593Smuzhiyun * aac_rkt_init - initialize an i960 based AAC card
79*4882a593Smuzhiyun * @dev: device to configure
80*4882a593Smuzhiyun *
81*4882a593Smuzhiyun * Allocate and set up resources for the i960 based AAC variants. The
82*4882a593Smuzhiyun * device_interface in the commregion will be allocated and linked
83*4882a593Smuzhiyun * to the comm region.
84*4882a593Smuzhiyun */
85*4882a593Smuzhiyun
aac_rkt_init(struct aac_dev * dev)86*4882a593Smuzhiyun int aac_rkt_init(struct aac_dev *dev)
87*4882a593Smuzhiyun {
88*4882a593Smuzhiyun /*
89*4882a593Smuzhiyun * Fill in the function dispatch table.
90*4882a593Smuzhiyun */
91*4882a593Smuzhiyun dev->a_ops.adapter_ioremap = aac_rkt_ioremap;
92*4882a593Smuzhiyun dev->a_ops.adapter_comm = aac_rkt_select_comm;
93*4882a593Smuzhiyun
94*4882a593Smuzhiyun return _aac_rx_init(dev);
95*4882a593Smuzhiyun }
96