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) 2000-2007 Adaptec, Inc. (aacraid@adaptec.com) 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 31 #include <linux/blkdev.h> 32 33 #include <scsi/scsi_host.h> 34 35 #include "aacraid.h" 36 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; 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 70 /** 71 * aac_rkt_ioremap 72 * @size: mapping resize request 73 * 74 */ 75 static int aac_rkt_ioremap(struct aac_dev * dev, u32 size) 76 { 77 if (!size) { 78 iounmap(dev->regs.rkt); 79 return 0; 80 } 81 dev->base = dev->regs.rkt = ioremap(dev->scsi_host_ptr->base, size); 82 if (dev->base == NULL) 83 return -1; 84 dev->IndexRegs = &dev->regs.rkt->IndexRegs; 85 return 0; 86 } 87 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 { 99 /* 100 * Fill in the function dispatch table. 101 */ 102 dev->a_ops.adapter_ioremap = aac_rkt_ioremap; 103 dev->a_ops.adapter_comm = aac_rkt_select_comm; 104 105 return _aac_rx_init(dev); 106 } 107