path: root/drivers/scsi/aic94xx/aic94xx_init.c

/*
 * Aic94xx SAS/SATA driver initialization.
 *
 * Copyright (C) 2005 Adaptec, Inc.  All rights reserved.
 * Copyright (C) 2005 Luben Tuikov <luben_tuikov@adaptec.com>
 *
 * This file is licensed under GPLv2.
 *
 * This file is part of the aic94xx driver.
 *
 * The aic94xx driver 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; version 2 of the
 * License.
 *
 * The aic94xx driver 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 the aic94xx driver; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/delay.h>
#include <linux/firmware.h>
#include <linux/slab.h>

#include <scsi/scsi_host.h>

#include "aic94xx.h"
#include "aic94xx_reg.h"
#include "aic94xx_hwi.h"
#include "aic94xx_seq.h"
#include "aic94xx_sds.h"

/* The format is "version.release.patchlevel" */
#define ASD_DRIVER_VERSION "1.0.3"

static int use_msi = 0;
module_param_named(use_msi, use_msi, int, S_IRUGO);
MODULE_PARM_DESC(use_msi, "\n"
	"\tEnable(1) or disable(0) using PCI MSI.\n"
	"\tDefault: 0");

static int lldd_max_execute_num = 0;
module_param_named(collector, lldd_max_execute_num, int, S_IRUGO);
MODULE_PARM_DESC(collector, "\n"
	"\tIf greater than one, tells the SAS Layer to run in Task Collector\n"
	"\tMode.  If 1 or 0, tells the SAS Layer to run in Direct Mode.\n"
	"\tThe aic94xx SAS LLDD supports both modes.\n"
	"\tDefault: 0 (Direct Mode).\n");

static struct scsi_transport_template *aic94xx_transport_template;
static int asd_scan_finished(struct Scsi_Host *, unsigned long);
static void asd_scan_start(struct Scsi_Host *);

static struct scsi_host_template aic94xx_sht = {
	.module			= THIS_MODULE,
	/* .name is initialized */
	.name			= "aic94xx",
	.queuecommand		= sas_queuecommand,
	.target_alloc		= sas_target_alloc,
	.slave_configure	= sas_slave_configure,
	.slave_destroy		= sas_slave_destroy,
	.scan_finished		= asd_scan_finished,
	.scan_start		= asd_scan_start,
	.change_queue_depth	= sas_change_queue_depth,
	.change_queue_type	= sas_change_queue_type,
	.bios_param		= sas_bios_param,
	.can_queue		= 1,
	.cmd_per_lun		= 1,
	.this_id		= -1,
	.sg_tablesize		= SG_ALL,
	.max_sectors		= SCSI_DEFAULT_MAX_SECTORS,
	.use_clustering		= ENABLE_CLUSTERING,
	.eh_device_reset_handler	= sas_eh_device_reset_handler,
	.eh_bus_reset_handler	= sas_eh_bus_reset_handler,
	.slave_alloc		= sas_slave_alloc,
	.target_destroy		= sas_target_destroy,
	.ioctl			= sas_ioctl,
};

static int __devinit asd_map_memio(struct asd_ha_struct *asd_ha)
{
	int err, i;
	struct asd_ha_addrspace *io_handle;

	asd_ha->iospace = 0;
	for (i = 0; i < 3; i += 2) {
		io_handle = &asd_ha->io_handle[i==0?0:1];
		io_handle->start = pci_resource_start(asd_ha->pcidev, i);
		io_handle->len   = pci_resource_len(asd_ha->pcidev, i);
		io_handle->flags = pci_resource_flags(asd_ha->pcidev, i);
		err = -ENODEV;
		if (!io_handle->start || !io_handle->len) {
			asd_printk("MBAR%d start or length for %s is 0.\n",
				   i==0?0:1, pci_name(asd_ha->pcidev));
			goto Err;
		}
		err = pci_request_region(asd_ha->pcidev, i, ASD_DRIVER_NAME);
		if (err) {
			asd_printk("couldn't reserve memory region for %s\n",
				   pci_name(asd_ha->pcidev));
			goto Err;
		}
		if (io_handle->flags & IORESOURCE_CACHEABLE)
			io_handle->addr = ioremap(io_handle->start,
						  io_handle->len);
		else
			io_handle->addr = ioremap_nocache(io_ha