1 /* 2 * Adaptec AAC series RAID controller driver 3 * (c) Copyright 2001 Red Hat Inc. <alan@redhat.com> 4 * 5 * based on the old aacraid driver that is.. 6 * Adaptec aacraid device driver for Linux. 7 * 8 * Copyright (c) 2000 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 extern int aac_rx_select_comm(struct aac_dev *dev, int comm); 49 retval = aac_rx_select_comm(dev, comm); 50 if (comm == AAC_COMM_MESSAGE) { 51 /* 52 * FIB Setup has already been done, but we can minimize the 53 * damage by at least ensuring the OS never issues more 54 * commands than we can handle. The Rocket adapters currently 55 * can only handle 246 commands and 8 AIFs at the same time, 56 * and in fact do notify us accordingly if we negotiate the 57 * FIB size. The problem that causes us to add this check is 58 * to ensure that we do not overdo it with the adapter when a 59 * hard coded FIB override is being utilized. This special 60 * case warrants this half baked, but convenient, check here. 61 */ 62 if (dev->scsi_host_ptr->can_queue > AAC_NUM_IO_FIB_RKT) { 63 dev->init->MaxIoCommands = 64 cpu_to_le32(AAC_NUM_IO_FIB_RKT + AAC_NUM_MGT_FIB); 65 dev->scsi_host_ptr->can_queue = AAC_NUM_IO_FIB_RKT; 66 } 67 } 68 return retval; 69 } 70 71 /** 72 * aac_rkt_ioremap 73 * @size: mapping resize request 74 * 75 */ 76 static int aac_rkt_ioremap(struct aac_dev * dev, u32 size) 77 { 78 if (!size) { 79 iounmap(dev->regs.rkt); 80 return 0; 81 } 82 dev->base = dev->regs.rkt = ioremap(dev->scsi_host_ptr->base, size); 83 if (dev->base == NULL) 84 return -1; 85 dev->IndexRegs = &dev->regs.rkt->IndexRegs; 86 return 0; 87 } 88 89 /** 90 * aac_rkt_init - initialize an i960 based AAC card 91 * @dev: device to configure 92 * 93 * Allocate and set up resources for the i960 based AAC variants. The 94 * device_interface in the commregion will be allocated and linked 95 * to the comm region. 96 */ 97 98 int aac_rkt_init(struct aac_dev *dev) 99 { 100 extern int _aac_rx_init(struct aac_dev *dev); 101 102 /* 103 * Fill in the function dispatch table. 104 */ 105 dev->a_ops.adapter_ioremap = aac_rkt_ioremap; 106 dev->a_ops.adapter_comm = aac_rkt_select_comm; 107 108 return _aac_rx_init(dev); 109 } 110