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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * Adaptec AAC series RAID controller driver4 * (c) Copyright 2001 Red Hat Inc.5 *6 * based on the old aacraid driver that is..7 * Adaptec aacraid device driver for Linux.8 *9 * Copyright (c) 2000-2010 Adaptec, Inc.10 * 2010-2015 PMC-Sierra, Inc. (aacraid@pmc-sierra.com)11 * 2016-2017 Microsemi Corp. (aacraid@microsemi.com)12 *13 * Module Name:14 * rkt.c15 *16 * Abstract: Hardware miniport for Drawbridge specific hardware functions.17 */18 19#include <linux/blkdev.h>20 21#include <scsi/scsi_host.h>22 23#include "aacraid.h"24 25#define AAC_NUM_IO_FIB_RKT (246 - AAC_NUM_MGT_FIB)26 27/**28 * aac_rkt_select_comm - Select communications method29 * @dev: Adapter30 * @comm: communications method31 */32 33static int aac_rkt_select_comm(struct aac_dev *dev, int comm)34{35 int retval;36 retval = aac_rx_select_comm(dev, comm);37 if (comm == AAC_COMM_MESSAGE) {38 /*39 * FIB Setup has already been done, but we can minimize the40 * damage by at least ensuring the OS never issues more41 * commands than we can handle. The Rocket adapters currently42 * can only handle 246 commands and 8 AIFs at the same time,43 * and in fact do notify us accordingly if we negotiate the44 * FIB size. The problem that causes us to add this check is45 * to ensure that we do not overdo it with the adapter when a46 * hard coded FIB override is being utilized. This special47 * case warrants this half baked, but convenient, check here.48 */49 if (dev->scsi_host_ptr->can_queue > AAC_NUM_IO_FIB_RKT) {50 dev->init->r7.max_io_commands =51 cpu_to_le32(AAC_NUM_IO_FIB_RKT + AAC_NUM_MGT_FIB);52 dev->scsi_host_ptr->can_queue = AAC_NUM_IO_FIB_RKT;53 }54 }55 return retval;56}57 58/**59 * aac_rkt_ioremap60 * @dev: device to ioremap61 * @size: mapping resize request62 *63 */64static int aac_rkt_ioremap(struct aac_dev * dev, u32 size)65{66 if (!size) {67 iounmap(dev->regs.rkt);68 return 0;69 }70 dev->base = dev->regs.rkt = ioremap(dev->base_start, size);71 if (dev->base == NULL)72 return -1;73 dev->IndexRegs = &dev->regs.rkt->IndexRegs;74 return 0;75}76 77/**78 * aac_rkt_init - initialize an i960 based AAC card79 * @dev: device to configure80 *81 * Allocate and set up resources for the i960 based AAC variants. The82 * device_interface in the commregion will be allocated and linked83 * to the comm region.84 */85 86int aac_rkt_init(struct aac_dev *dev)87{88 /*89 * Fill in the function dispatch table.90 */91 dev->a_ops.adapter_ioremap = aac_rkt_ioremap;92 dev->a_ops.adapter_comm = aac_rkt_select_comm;93 94 return _aac_rx_init(dev);95}96