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