cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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rkt.c (2532B)

      1// SPDX-License-Identifier: GPL-2.0-or-later
      2/*
      3 *	Adaptec AAC series RAID controller driver
      4 *	(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.c
     15 *
     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 method
     29 *	@dev: Adapter
     30 *	@comm: communications method
     31 */
     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 the
     40		 * damage by at least ensuring the OS never issues more
     41		 * commands than we can handle. The Rocket adapters currently
     42		 * can only handle 246 commands and 8 AIFs at the same time,
     43		 * and in fact do notify us accordingly if we negotiate the
     44		 * FIB size. The problem that causes us to add this check is
     45		 * to ensure that we do not overdo it with the adapter when a
     46		 * hard coded FIB override is being utilized. This special
     47		 * 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_ioremap
     60 *	@dev: device to ioremap
     61 *	@size: mapping resize request
     62 *
     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 card
     79 *	@dev: device to configure
     80 *
     81 *	Allocate and set up resources for the i960 based AAC variants. The
     82 *	device_interface in the commregion will be allocated and linked
     83 *	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}