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- // SPDX-License-Identifier: GPL-2.0-or-later
- /*
- * Adaptec AAC series RAID controller driver
- * (c) Copyright 2001 Red Hat Inc.
- *
- * based on the old aacraid driver that is..
- * Adaptec aacraid device driver for Linux.
- *
- * Copyright (c) 2000-2010 Adaptec, Inc.
- * 2010-2015 PMC-Sierra, Inc. ([email protected])
- * 2016-2017 Microsemi Corp. ([email protected])
- *
- * Module Name:
- * rkt.c
- *
- * Abstract: Hardware miniport for Drawbridge specific hardware functions.
- */
- #include <linux/blkdev.h>
- #include <scsi/scsi_host.h>
- #include "aacraid.h"
- #define AAC_NUM_IO_FIB_RKT (246 - AAC_NUM_MGT_FIB)
- /**
- * aac_rkt_select_comm - Select communications method
- * @dev: Adapter
- * @comm: communications method
- */
- static int aac_rkt_select_comm(struct aac_dev *dev, int comm)
- {
- int retval;
- retval = aac_rx_select_comm(dev, comm);
- if (comm == AAC_COMM_MESSAGE) {
- /*
- * FIB Setup has already been done, but we can minimize the
- * damage by at least ensuring the OS never issues more
- * commands than we can handle. The Rocket adapters currently
- * can only handle 246 commands and 8 AIFs at the same time,
- * and in fact do notify us accordingly if we negotiate the
- * FIB size. The problem that causes us to add this check is
- * to ensure that we do not overdo it with the adapter when a
- * hard coded FIB override is being utilized. This special
- * case warrants this half baked, but convenient, check here.
- */
- if (dev->scsi_host_ptr->can_queue > AAC_NUM_IO_FIB_RKT) {
- dev->init->r7.max_io_commands =
- cpu_to_le32(AAC_NUM_IO_FIB_RKT + AAC_NUM_MGT_FIB);
- dev->scsi_host_ptr->can_queue = AAC_NUM_IO_FIB_RKT;
- }
- }
- return retval;
- }
- /**
- * aac_rkt_ioremap
- * @dev: device to ioremap
- * @size: mapping resize request
- *
- */
- static int aac_rkt_ioremap(struct aac_dev * dev, u32 size)
- {
- if (!size) {
- iounmap(dev->regs.rkt);
- return 0;
- }
- dev->base = dev->regs.rkt = ioremap(dev->base_start, size);
- if (dev->base == NULL)
- return -1;
- dev->IndexRegs = &dev->regs.rkt->IndexRegs;
- return 0;
- }
- /**
- * aac_rkt_init - initialize an i960 based AAC card
- * @dev: device to configure
- *
- * Allocate and set up resources for the i960 based AAC variants. The
- * device_interface in the commregion will be allocated and linked
- * to the comm region.
- */
- int aac_rkt_init(struct aac_dev *dev)
- {
- /*
- * Fill in the function dispatch table.
- */
- dev->a_ops.adapter_ioremap = aac_rkt_ioremap;
- dev->a_ops.adapter_comm = aac_rkt_select_comm;
- return _aac_rx_init(dev);
- }
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