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 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 */ 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 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