path: root/drivers/infiniband/hw/mthca/mthca_main.c

/*
 * Copyright (c) 2004, 2005 Topspin Communications.  All rights reserved.
 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
 * Copyright (c) 2005 Mellanox Technologies. All rights reserved.
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * OpenIB.org BSD license below:
 *
 *     Redistribution and use in source and binary forms, with or
 *     without modification, are permitted provided that the following
 *     conditions are met:
 *
 *      - Redistributions of source code must retain the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer.
 *
 *      - Redistributions in binary form must reproduce the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer in the documentation and/or other materials
 *        provided with the distribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 * $Id: mthca_main.c 1396 2004-12-28 04:10:27Z roland $
 */

#include <linux/config.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/pci.h>
#include <linux/interrupt.h>

#include "mthca_dev.h"
#include "mthca_config_reg.h"
#include "mthca_cmd.h"
#include "mthca_profile.h"
#include "mthca_memfree.h"

MODULE_AUTHOR("Roland Dreier");
MODULE_DESCRIPTION("Mellanox InfiniBand HCA low-level driver");
MODULE_LICENSE("Dual BSD/GPL");
MODULE_VERSION(DRV_VERSION);

#ifdef CONFIG_PCI_MSI

static int msi_x = 0;
module_param(msi_x, int, 0444);
MODULE_PARM_DESC(msi_x, "attempt to use MSI-X if nonzero");

static int msi = 0;
module_param(msi, int, 0444);
MODULE_PARM_DESC(msi, "attempt to use MSI if nonzero");

#else /* CONFIG_PCI_MSI */

#define msi_x (0)
#define msi   (0)

#endif /* CONFIG_PCI_MSI */

static const char mthca_version[] __devinitdata =
	DRV_NAME ": Mellanox InfiniBand HCA driver v"
	DRV_VERSION " (" DRV_RELDATE ")\n";

static struct mthca_profile default_profile = {
	.num_qp		   = 1 << 16,
	.rdb_per_qp	   = 4,
	.num_cq		   = 1 << 16,
	.num_mcg	   = 1 << 13,
	.num_mpt	   = 1 << 17,
	.num_mtt	   = 1 << 20,
	.num_udav	   = 1 << 15,	/* Tavor only */
	.fmr_reserved_mtts = 1 << 18,	/* Tavor only */
	.uarc_size	   = 1 << 18,	/* Arbel only */
};

static int __devinit mthca_tune_pci(struct mthca_dev *mdev)
{
	int cap;
	u16 val;

	/* First try to max out Read Byte Count */
	cap = pci_find_capability(mdev->pdev, PCI_CAP_ID_PCIX);
	if (cap) {
		if (pci_read_config_word(mdev->pdev, cap + PCI_X_CMD, &val)) {
			mthca_err(mdev, "Couldn't read PCI-X command register, "
				  "aborting.\n");
			return -ENODEV;
		}
		val = (val & ~PCI_X_CMD_MAX_READ) | (3 << 2);
		if (pci_write_config_word(mdev->pdev, cap + PCI_X_CMD, val)) {
			mthca_err(mdev, "Couldn't write PCI-X command register, "
				  "aborting.\n");
			return -