[linux-2.6-block.git] / drivers / scsi / aacraid / rkt.c

/*
 *	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 PMC-Sierra, Inc. (aacraid@pmc-sierra.com)
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; see the file COPYING.  If not, write to
 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 * 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->MaxIoCommands =
				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
 *	@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);
}
Commit	Line	Data
1da177e4 LT	1	/*
1da177e4 LT	2	* Adaptec AAC series RAID controller driver
fa195afe	3	* (c) Copyright 2001 Red Hat Inc.
1da177e4 LT	4	*
	5	* based on the old aacraid driver that is..
	6	* Adaptec aacraid device driver for Linux.
	7	*
e8b12f0f MR	8	* Copyright (c) 2000-2010 Adaptec, Inc.
e8b12f0f MR	9	* 2010 PMC-Sierra, Inc. (aacraid@pmc-sierra.com)
1da177e4 LT	10	*
	11	* This program is free software; you can redistribute it and/or modify
	12	* it under the terms of the GNU General Public License as published by
	13	* the Free Software Foundation; either version 2, or (at your option)
	14	* any later version.
	15	*
	16	* This program is distributed in the hope that it will be useful,
	17	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	18	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	19	* GNU General Public License for more details.
	20	*
	21	* You should have received a copy of the GNU General Public License
	22	* along with this program; see the file COPYING. If not, write to
	23	* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
	24	*
	25	* Module Name:
	26	* rkt.c
	27	*
	28	* Abstract: Hardware miniport for Drawbridge specific hardware functions.
	29	*
	30	*/
	31
1da177e4	32	#include <linux/blkdev.h>
1da177e4 LT	33
	34	#include <scsi/scsi_host.h>
	35
	36	#include "aacraid.h"
	37
28713324 MH	38	#define AAC_NUM_IO_FIB_RKT (246 - AAC_NUM_MGT_FIB)
	39
	40	/**
	41	* aac_rkt_select_comm - Select communications method
	42	* @dev: Adapter
	43	* @comm: communications method
	44	*/
	45
	46	static int aac_rkt_select_comm(struct aac_dev *dev, int comm)
	47	{
	48	int retval;
28713324 MH	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
1da177e4	71	/**
76a7f8fd MH	72	* aac_rkt_ioremap
76a7f8fd MH	73	* @size: mapping resize request
1da177e4	74	*
1da177e4	75	*/
76a7f8fd	76	static int aac_rkt_ioremap(struct aac_dev * dev, u32 size)
1da177e4	77	{
76a7f8fd MH	78	if (!size) {
	79	iounmap(dev->regs.rkt);
	80	return 0;
1da177e4	81	}
ff08784b	82	dev->base = dev->regs.rkt = ioremap(dev->base_start, size);
76a7f8fd	83	if (dev->base == NULL)
1da177e4	84	return -1;
76a7f8fd	85	dev->IndexRegs = &dev->regs.rkt->IndexRegs;
8c23cd74 MH	86	return 0;
	87	}
	88
1da177e4 LT	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	{
1da177e4 LT	100	/*
	101	* Fill in the function dispatch table.
	102	*/
76a7f8fd	103	dev->a_ops.adapter_ioremap = aac_rkt_ioremap;
28713324	104	dev->a_ops.adapter_comm = aac_rkt_select_comm;
bd1aac80	105
28713324	106	return _aac_rx_init(dev);
1da177e4	107	}