/*
 * 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.
 */

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

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

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

#ifdef CONFIG_INFINIBAND_MTHCA_DEBUG

int mthca_debug_level = 0;
module_param_named(debug_level, mthca_debug_level, int, 0644);
MODULE_PARM_DESC(debug_level, "Enable debug tracing if > 0");

#endif /* CONFIG_INFINIBAND_MTHCA_DEBUG */

#ifdef CONFIG_PCI_MSI

static int msi_x = 1;
module_param(msi_x, int, 0444);
MODULE_PARM_DESC(msi_x, "attempt to use MSI-X if nonzero");

#else /* CONFIG_PCI_MSI */

#define msi_x (0)

#endif /* CONFIG_PCI_MSI */

static int tune_pci = 0;
module_param(tune_pci, int, 0444);
MODULE_PARM_DESC(tune_pci, "increase PCI burst from the default set by BIOS if nonzero");

DEFINE_MUTEX(mthca_device_mutex);

#define MTHCA_DEFAULT_NUM_QP            (1 << 16)
#define MTHCA_DEFAULT_RDB_PER_QP        (1 << 2)
#define MTHCA_DEFAULT_NUM_CQ            (1 << 16)
#define MTHCA_DEFAULT_NUM_MCG           (1 << 13)
#define MTHCA_DEFAULT_NUM_MPT           (1 << 17)
#define MTHCA_DEFAULT_NUM_MTT           (1 << 20)
#define MTHCA_DEFAULT_NUM_UDAV          (1 << 15)
#define MTHCA_DEFAULT_NUM_RESERVED_MTTS (1 << 18)
#define MTHCA_DEFAULT_NUM_UARC_SIZE     (1 << 18)

static struct mthca_profile hca_profile = {
	.num_qp             = MTHCA_DEFAULT_NUM_QP,
	.rdb_per_qp         = MTHCA_DEFAULT_RDB_PER_QP,
	.num_cq             = MTHCA_DEFAULT_NUM_CQ,
	.num_mcg            = MTHCA_DEFAULT_NUM_MCG,
	.num_mpt            = MTHCA_DEFAULT_NUM_MPT,
	.num_mtt            = MTHCA_DEFAULT_NUM_MTT,
	.num_udav           = MTHCA_DEFAULT_NUM_UDAV,          /* Tavor only */
	.fmr_reserved_mtts  = MTHCA_DEFAULT_NUM_RESERVED_MTTS, /* Tavor only */
	.uarc_size          = MTHCA_DEFAULT_NUM_UARC_SIZE,     /* Arbel only */
};

module_param_named(num_qp, hca_profile.num_qp, int, 0444);
MODULE_PARM_DESC(num_qp, "maximum number of QPs per HCA");

module_param_named(rdb_per_qp, hca_profile.rdb_per_qp, int, 0444);
MODULE_PARM_DESC(rdb_per_qp, "number of RDB buffers per QP");

module_param_named(num_cq, hca_profile.num_cq, int, 0444);
MODULE_PARM_DESC(num_cq, "maximum number of CQs per HCA");

module_param_named(num_mcg, hca_profile.num_mcg, int, 0444);
MODULE_PARM_DESC(num_mcg, "maximum number of multicast groups per HCA");

module_param_named(num_mpt, hca_profile.num_mpt, int, 0444);
MODULE_PARM_DESC(num_mpt,
		"maximum number of memory protection table entries per HCA");

module_param_named(num_mtt, hca_profile.num_mtt, int, 0444);
MODULE_PARM_DESC(num_mtt,
		 "maximum number of memory translation table segments per HCA");

module_param_named(num_udav, hca_profile.num_udav, int, 0444);
MODULE_PARM_DESC(num_udav, "maximum number of UD address vectors per HCA");

module_param_named(fmr_reserved_mtts, hca_profile.fmr_reserved_mtts, int, 0444);
MODULE_PARM_DESC(fmr_reserved_mtts,
		 "number of memory translation table segments reserved for FMR");

static int log_mtts_per_seg = ilog2(MTHCA_MTT_SEG_SIZE / 8);
module_param_named(log_mtts_per_seg, log_mtts_per_seg, int, 0444);
MODULE_PARM_DESC(log_mtts_per_seg, "Log2 number of MTT entries per segment (1-5)");

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

static int mthca_tune_pci(struct mthca_dev *mdev)
{
	if (!tune_pci)
		return 0;

	/* First try to max out Read Byte Count */
	if (pci_find_capability(mdev->pdev, PCI_CAP_ID_PCIX)) {
		if (pcix_set_mmrbc(mdev->pdev, pcix_get_max_mmrbc(mdev->pdev))) {
			mthca_err(mdev, "Couldn't set PCI-X max read count, "
				"aborting.\n");
			return -ENODEV;
		}
	} else if (!(mdev->mthca_flags & MTHCA_FLAG_PCIE))
		mthca_info(mdev, "No PCI-X capability, not setting RBC.\n");

	if (pci_is_pcie(mdev->pdev)) {
		if (pcie_set_readrq(mdev->pdev, 4096)) {
			mthca_err(mdev, "Couldn't write PCI Express read request, "
				"aborting.\n");
			return -ENODEV;
		}
	} else if (mdev->mthca_flags & MTHCA_FLAG_PCIE)
		mthca_info(mdev, "No PCI Express capability, "
			   "not setting Max Read Request Size.\n");

	return 0;
}

static int mthca_dev_lim(struct mthca_dev *mdev, struct mthca_dev_lim *dev_lim)
{
	int err;

	mdev->limits.mtt_seg_size = (1 << log_mtts_per_seg) * 8;
	err = mthca_QUERY_DEV_LIM(mdev, dev_lim);
	if (err) {
		mthca_err(mdev, "QUERY_DEV_LIM command returned %d"
				", aborting.\n", err);
		return err;
	}
	if (dev_lim->min_page_sz > PAGE_SIZE) {
		mthca_err(mdev, "HCA minimum page size of %d bigger than "
			  "kernel PAGE_SIZE of %ld, aborting.\n",
			  dev_lim->min_page_sz, PAGE_SIZE);
		return -ENODEV;
	}
	if (dev_lim->num_ports > MTHCA_MAX_PORTS) {
		mthca_err(mdev, "HCA has %d ports, but we only support %d, "
			  "aborting.\n",
			  dev_lim->num_ports, MTHCA_MAX_PORTS);
		return -ENODEV;
	}

	if (dev_lim->uar_size > pci_resource_len(mdev->pdev, 2)) {
		mthca_err(mdev, "HCA reported UAR size of 0x%x bigger than "
			  "PCI resource 2 size of 0x%llx, aborting.\n",
			  dev_lim->uar_size,
			  (unsigned long long)pci_resource_len(mdev->pdev, 2));
		return -ENODEV;
	}

	mdev->limits.num_ports      	= dev_lim->num_ports;
	mdev->limits.vl_cap             = dev_lim->max_vl;
	mdev->limits.mtu_cap            = dev_lim->max_mtu;
	mdev->limits.gid_table_len  	= dev_lim->max_gids;
	mdev->limits.pkey_table_len 	= dev_lim->max_pkeys;
	mdev->limits.local_ca_ack_delay = dev_lim->local_ca_ack_delay;
	/*
	 * Need to allow for worst case send WQE overhead and check
	 * whether max_desc_sz imposes a lower limit than max_sg; UD
	 * send has the biggest overhead.
	 */
	mdev->limits.max_sg		= min_t(int, dev_lim->max_sg,
					      (dev_lim->max_desc_sz -
					       sizeof (struct mthca_next_seg) -
					       (mthca_is_memfree(mdev) ?
						sizeof (struct mthca_arbel_ud_seg) :
						sizeof (struct mthca_tavor_ud_seg))) /
						sizeof (struct mthca_data_seg));
	mdev->limits.max_wqes           = dev_lim->max_qp_sz;
	mdev->limits.max_qp_init_rdma   = dev_lim->max_requester_per_qp;
	mdev->limits.reserved_qps       = dev_lim->reserved_qps;
	mdev->limits.max_srq_wqes       = dev_lim->max_srq_sz;
	mdev->limits.reserved_srqs      = dev_lim->reserved_srqs;
	mdev->limits.reserved_eecs      = dev_lim->reserved_eecs;
	mdev->limits.max_desc_sz        = dev_lim->max_desc_sz;
	mdev->limits.max_srq_sge	= mthca_max_srq_sge(mdev);
	/*
	 * Subtract 1 from the limit because we need to allocate a
	 * spare CQE so the HCA HW can tell the difference between an
	 * empty CQ and a full CQ.
	 */
	mdev->limits.max_cqes           = dev_lim->max_cq_sz - 1;
	mdev->limits.reserved_cqs       = dev_lim->reserved_cqs;
	mdev->limits.reserved_eqs       = dev_lim->reserved_eqs;
	mdev->limits.reserved_mtts      = dev_lim->reserved_mtts;
	mdev->limits.reserved_mrws      = dev_lim->reserved_mrws;
	mdev->limits.reserved_uars      = dev_lim->reserved_uars;
	mdev->limits.reserved_pds       = dev_lim->reserved_pds;
	mdev->limits.port_width_cap     = dev_lim->max_port_width;
	mdev->limits.page_size_cap      = ~(u32) (dev_lim->min_page_sz - 1);
	mdev->limits.flags              = dev_lim->flags;
	/*
	 * For old FW that doesn't return static rate support, use a
	 * value of 0x3 (only static rate values of 0 or 1 are handled),
	 * except on Sinai, where even old FW can handle static rate
	 * values of 2 and 3.
	 */
	if (dev_lim->stat_rate_support)
		mdev->limits.stat_rate_support = dev_lim->stat_rate_support;
	else if (mdev->mthca_flags & MTHCA_FLAG_SINAI_OPT)
		mdev->limits.stat_rate_support = 0xf;
	else
		mdev->limits.stat_rate_support = 0x3;

	/* IB_DEVICE_RESIZE_MAX_WR not supported by driver.
	   May be doable since hardware supports it for SRQ.

	   IB_DEVICE_N_NOTIFY_CQ is supported by hardware but not by driver.

	   IB_DEVICE_SRQ_RESIZE is supported by hardware but SRQ is not
	   supported by driver. */
	mdev->device_cap_flags = IB_DEVICE_CHANGE_PHY_PORT |
		IB_DEVICE_PORT_ACTIVE_EVENT |
		IB_DEVICE_SYS_IMAGE_GUID |
		IB_DEVICE_RC_RNR_NAK_GEN;

	if (dev_lim->flags & DEV_LIM_FLAG_BAD_PKEY_CNTR)
		mdev->device_cap_flags |= IB_DEVICE_BAD_PKEY_CNTR;

	if (dev_lim->flags & DEV_LIM_FLAG_BAD_QKEY_CNTR)
		mdev->device_cap_flags |= IB_DEVICE_BAD_QKEY_CNTR;

	if (dev_lim->flags & DEV_LIM_FLAG_RAW_MULTI)
		mdev->device_cap_flags |= IB_DEVICE_RAW_MULTI;

	if (dev_lim->flags & DEV_LIM_FLAG_AUTO_PATH_MIG)
		mdev->device_cap_flags |= IB_DEVICE_AUTO_PATH_MIG;

	if (dev_lim->flags & DEV_LIM_FLAG_UD_AV_PORT_ENFORCE)
		mdev->device_cap_flags |= IB_DEVICE_UD_AV_PORT_ENFORCE;

	if (dev_lim->flags & DEV_LIM_FLAG_SRQ)
		mdev->mthca_flags |= MTHCA_FLAG_SRQ;

	if (mthca_is_memfree(mdev))
		if (dev_lim->flags & DEV_LIM_FLAG_IPOIB_CSUM)
			mdev->device_cap_flags |= IB_DEVICE_UD_IP_CSUM;

	return 0;
}

static int mthca_init_tavor(struct mthca_dev *mdev)
{
	s64 size;
	int err;
	struct mthca_dev_lim        dev_lim;
	struct mthca_profile        profile;
	struct mthca_init_hca_param init_hca;

	err = mthca_SYS_EN(mdev);
	if (err) {
		mthca_err(mdev, "SYS_EN command returned %d, aborting.\n", err);
		return err;
	}

	err = mthca_QUERY_FW(mdev);
	if (err) {
		mthca_err(mdev, "QUERY_FW command returned %d,"
				" aborting.\n", err);
		goto err_disable;
	}
	err = mthca_QUERY_DDR(mdev);
	if (err) {
		mthca_err(mdev, "QUERY_DDR command returned %d, aborting.\n", err);
		goto err_disable;
	}

	err = mthca_dev_lim(mdev, &dev_lim);
	if (err) {
		mthca_err(mdev, "QUERY_DEV_LIM command returned %d, aborting.\n", err);
		goto err_disable;
	}

	profile = hca_profile;
	profile.num_uar   = dev_lim.uar_size / PAGE_SIZE;
	profile.uarc_size = 0;
	if (mdev->mthca_flags & MTHCA_FLAG_SRQ)
		profile.num_srq = dev_lim.max_srqs;

	size = mthca_make_profile(mdev, &profile, &dev_lim, &init_hca);
	if (size < 0) {
		err = size;
		goto err_disable;
	}

	err = mthca_INIT_HCA(mdev, &init_hca);
	if (err) {
		mthca_err(mdev, "INIT_HCA command returned %d, aborting.\n", err);
		goto err_disable;
	}

	return 0;

err_disable:
	mthca_SYS_DIS(mdev);

	return err;
}

static int mthca_load_fw(struct mthca_dev *mdev)
{
	int err;

	/* FIXME: use HCA-attached memory for FW if present */

	mdev->fw.arbel.fw_icm =
		mthca_alloc_icm(mdev, mdev->fw.arbel.fw_pages,
				GFP_HIGHUSER | __GFP_NOWARN, 0);
	if (!mdev->fw.arbel.fw_icm) {
		mthca_err(mdev, "Couldn't allocate FW area, aborting.\n");
		return -ENOMEM;
	}

	err = mthca_MAP_FA(mdev, mdev->fw.arbel.fw_icm);
	if (err) {
		mthca_err(mdev, "MAP_FA command returned %d, aborting.\n", err);
		goto err_free;
	}
	err = mthca_RUN_FW(mdev);
	if (err) {
		mthca_err(mdev, "RUN_FW command returned %d, aborting.\n", err);
		goto err_unmap_fa;
	}

	return 0;

err_unmap_fa:
	mthca_UNMAP_FA(mdev);

err_free:
	mthca_free_icm(mdev, mdev->fw.arbel.fw_icm, 0);
	return err;
}

static int mthca_init_icm(struct mthca_dev *mdev,
			  struct mthca_dev_lim *dev_lim,
			  struct mthca_init_hca_param *init_hca,
			  u64 icm_size)
{
	u64 aux_pages;
	int err;

	err = mthca_SET_ICM_SIZE(mdev, icm_size, &aux_pages);
	if (err) {
		mthca_err(mdev, "SET_ICM_SIZE command returned %d, aborting.\n", err);
		return err;
	}

	mthca_dbg(mdev, "%lld KB of HCA context requires %lld KB aux memory.\n",
		  (unsigned long long) icm_size >> 10,
		  (unsigned long long) aux_pages << 2);

	mdev->fw.arbel.aux_icm = mthca_alloc_icm(mdev, aux_pages,
						 GFP_HIGHUSER | __GFP_NOWARN, 0);
	if (!mdev->fw.arbel.aux_icm) {
		mthca_err(mdev, "Couldn't allocate aux memory, aborting.\n");
		return -ENOMEM;
	}

	err = mthca_MAP_ICM_AUX(mdev, mdev->fw.arbel.aux_icm);
	if (err) {
		mthca_err(mdev, "MAP_ICM_AUX returned %d, aborting.\n", err);
		goto err_free_aux;
	}

	err = mthca_map_eq_icm(mdev, init_hca->eqc_base);
	if (err) {
		mthca_err(mdev, "Failed to map EQ context memory, aborting.\n");
		goto err_unmap_aux;
	}

	/* CPU writes to non-reserved MTTs, while HCA might DMA to reserved mtts */
	mdev->limits.reserved_mtts = ALIGN(mdev->limits.reserved_mtts * mdev->limits.mtt_seg_size,
					   dma_get_cache_alignment()) / mdev->limits.mtt_seg_size;

	mdev->mr_table.mtt_table = mthca_alloc_icm_table(mdev, init_hca->mtt_base,
							 mdev->limits.mtt_seg_size,
							 mdev->limits.num_mtt_segs,
							 mdev->limits.reserved_mtts,
							 1, 0);
	if (!mdev->mr_table.mtt_table) {
		mthca_err(mdev, "Failed to map MTT context memory, aborting.\n");
		err = -ENOMEM;
		goto err_unmap_eq;
	}

	mdev->mr_table.mpt_table = mthca_alloc_icm_table(mdev, init_hca->mpt_base,
							 dev_lim->mpt_entry_sz,
							 mdev->limits.num_mpts,
							 mdev->limits.reserved_mrws,
							 1, 1);
	if (!mdev->mr_table.mpt_table) {
		mthca_err(mdev, "Failed to map MPT context memory, aborting.\n");
		err = -ENOMEM;
		goto err_unmap_mtt;
	}

	mdev->qp_table.qp_table = mthca_alloc_icm_table(mdev, init_hca->qpc_base,
							dev_lim->qpc_entry_sz,
							mdev->limits.num_qps,
							mdev->limits.reserved_qps,
							0, 0);
	if (!mdev->qp_table.qp_table) {
		mthca_err(mdev, "Failed to map QP context memory, aborting.\n");
		err = -ENOMEM;
		goto err_unmap_mpt;
	}

	mdev->qp_table.eqp_table = mthca_alloc_icm_table(mdev, init_hca->eqpc_base,
							 dev_lim->eqpc_entry_sz,
							 mdev->limits.num_qps,
							 mdev->limits.reserved_qps,
							 0, 0);
	if (!mdev->qp_table.eqp_table) {
		mthca_err(mdev, "Failed to map EQP context memory, aborting.\n");
		err = -ENOMEM;
		goto err_unmap_qp;
	}

	mdev->qp_table.rdb_table = mthca_alloc_icm_table(mdev, init_hca->rdb_base,
							 MTHCA_RDB_ENTRY_SIZE,
							 mdev->limits.num_qps <<
							 mdev->qp_table.rdb_shift, 0,
							 0, 0);
	if (!mdev->qp_table.rdb_table) {
		mthca_err(mdev, "Failed to map RDB context memory, aborting\n");
		err = -ENOMEM;
		goto err_unmap_eqp;
	}

       mdev->cq_table.table = mthca_alloc_icm_table(mdev, init_hca->cqc_base,
						    dev_lim->cqc_entry_sz,
						    mdev->limits.num_cqs,
						    mdev->limits.reserved_cqs,
						    0, 0);
	if (!mdev->cq_table.table) {
		mthca_err(mdev, "Failed to map CQ context memory, aborting.\n");
		err = -ENOMEM;
		goto err_unmap_rdb;
	}

	if (mdev->mthca_flags & MTHCA_FLAG_SRQ) {
		mdev->srq_table.table =
			mthca_alloc_icm_table(mdev, init_hca->srqc_base,
					      dev_lim->srq_entry_sz,
					      mdev->limits.num_srqs,
					      mdev->limits.reserved_srqs,
					      0, 0);
		if (!mdev->srq_table.table) {
			mthca_err(mdev, "Failed to map SRQ context memory, "
				  "aborting.\n");
			err = -ENOMEM;
			goto err_unmap_cq;
		}
	}

	/*
	 * It's not strictly required, but for simplicity just map the
	 * whole multicast group table now.  The table isn't very big
	 * and it's a lot easier than trying to track ref counts.
	 */
	mdev->mcg_table.table = mthca_alloc_icm_table(mdev, init_hca->mc_base,
						      MTHCA_MGM_ENTRY_SIZE,
						      mdev->limits.num_mgms +
						      mdev->limits.num_amgms,
						      mdev->limits.num_mgms +
						      mdev->limits.num_amgms,
						      0, 0);
	if (!mdev->mcg_table.table) {
		mthca_err(mdev, "Failed to map MCG context memory, aborting.\n");
		err = -ENOMEM;
		goto err_unmap_srq;
	}

	return 0;

err_unmap_srq:
	if (mdev->mthca_flags & MTHCA_FLAG_SRQ)
		mthca_free_icm_table(mdev, mdev->srq_table.table);

err_unmap_cq:
	mthca_free_icm_table(mdev, mdev->cq_table.table);

err_unmap_rdb:
	mthca_free_icm_table(mdev, mdev->qp_table.rdb_table);

err_unmap_eqp:
	mthca_free_icm_table(mdev, mdev->qp_table.eqp_table);

err_unmap_qp:
	mthca_free_icm_table(mdev, mdev->qp_table.qp_table);

err_unmap_mpt:
	mthca_free_icm_table(mdev, mdev->mr_table.mpt_table);

err_unmap_mtt:
	mthca_free_icm_table(mdev, mdev->mr_table.mtt_table);

err_unmap_eq:
	mthca_unmap_eq_icm(mdev);

err_unmap_aux:
	mthca_UNMAP_ICM_AUX(mdev);

err_free_aux:
	mthca_free_icm(mdev, mdev->fw.arbel.aux_icm, 0);

	return err;
}

static void mthca_free_icms(struct mthca_dev *mdev)
{

	mthca_free_icm_table(mdev, mdev->mcg_table.table);
	if (mdev->mthca_flags & MTHCA_FLAG_SRQ)
		mthca_free_icm_table(mdev, mdev->srq_table.table);
	mthca_free_icm_table(mdev, mdev->cq_table.table);
	mthca_free_icm_table(mdev, mdev->qp_table.rdb_table);
	mthca_free_icm_table(mdev, mdev->qp_table.eqp_table);
	mthca_free_icm_table(mdev, mdev->qp_table.qp_table);
	mthca_free_icm_table(mdev, mdev->mr_table.mpt_table);
	mthca_free_icm_table(mdev, mdev->mr_table.mtt_table);
	mthca_unmap_eq_icm(mdev);

	mthca_UNMAP_ICM_AUX(mdev);
	mthca_free_icm(mdev, mdev->fw.arbel.aux_icm, 0);
}

static int mthca_init_arbel(struct mthca_dev *mdev)
{
	struct mthca_dev_lim        dev_lim;
	struct mthca_profile        profile;
	struct mthca_init_hca_param init_hca;
	s64 icm_size;
	int err;

	err = mthca_QUERY_FW(mdev);
	if (err) {
		mthca_err(mdev, "QUERY_FW command failed %d, aborting.\n", err);
		return err;
	}

	err = mthca_ENABLE_LAM(mdev);
	if (err == -EAGAIN) {
		mthca_dbg(mdev, "No HCA-attached memory (running in MemFree mode)\n");
		mdev->mthca_flags |= MTHCA_FLAG_NO_LAM;
	} else if (err) {
		mthca_err(mdev, "ENABLE_LAM returned %d, aborting.\n", err);
		return err;
	}

	err = mthca_load_fw(mdev);
	if (err) {
		mthca_err(mdev, "Loading FW returned %d, aborting.\n", err);
		goto err_disable;
	}

	err = mthca_dev_lim(mdev, &dev_lim);
	if (err) {
		mthca_err(mdev, "QUERY_DEV_LIM returned %d, aborting.\n", err);
		goto err_stop_fw;
	}

	profile = hca_profile;
	profile.num_uar  = dev_lim.uar_size / PAGE_SIZE;
	profile.num_udav = 0;
	if (mdev->mthca_flags & MTHCA_FLAG_SRQ)
		profile.num_srq = dev_lim.max_srqs;

	icm_size = mthca_make_profile(mdev, &profile, &dev_lim, &init_hca);
	if (icm_size < 0) {
		err = icm_size;
		goto err_stop_fw;
	}

	err = mthca_init_icm(mdev, &dev_lim, &init_hca, icm_size);
	if (err)
		goto err_stop_fw;

	err = mthca_INIT_HCA(mdev, &init_hca);
	if (err) {
		mthca_err(mdev, "INIT_HCA command returned %d, aborting.\n", err);
		goto err_free_icm;
	}

	return 0;

err_free_icm:
	mthca_free_icms(mdev);

err_stop_fw:
	mthca_UNMAP_FA(mdev);
	mthca_free_icm(mdev, mdev->fw.arbel.fw_icm, 0);

err_disable:
	if (!(mdev->mthca_flags & MTHCA_FLAG_NO_LAM))
		mthca_DISABLE_LAM(mdev);

	return err;
}

static void mthca_close_hca(struct mthca_dev *mdev)
{
	mthca_CLOSE_HCA(mdev, 0);

	if (mthca_is_memfree(mdev)) {
		mthca_free_icms(mdev);

		mthca_UNMAP_FA(mdev);
		mthca_free_icm(mdev, mdev->fw.arbel.fw_icm, 0);

		if (!(mdev->mthca_flags & MTHCA_FLAG_NO_LAM))
			mthca_DISABLE_LAM(mdev);
	} else
		mthca_SYS_DIS(mdev);
}

static int mthca_init_hca(struct mthca_dev *mdev)
{
	int err;
	struct mthca_adapter adapter;

	if (mthca_is_memfree(mdev))
		err = mthca_init_arbel(mdev);
	else
		err = mthca_init_tavor(mdev);

	if (err)
		return err;

	err = mthca_QUERY_ADAPTER(mdev, &adapter);
	if (err) {
		mthca_err(mdev, "QUERY_ADAPTER command returned %d, aborting.\n", err);
		goto err_close;
	}

	mdev->eq_table.inta_pin = adapter.inta_pin;
	if (!mthca_is_memfree(mdev))
		mdev->rev_id = adapter.revision_id;
	memcpy(mdev->board_id, adapter.board_id, sizeof mdev->board_id);

	return 0;

err_close:
	mthca_close_hca(mdev);
	return err;
}

static int mthca_setup_hca(struct mthca_dev *dev)
{
	int err;

	MTHCA_INIT_DOORBELL_LOCK(&dev->doorbell_lock);

	err = mthca_init_uar_table(dev);
	if (err) {
		mthca_err(dev, "Failed to initialize "
			  "user access region table, aborting.\n");
		return err;
	}

	err = mthca_uar_alloc(dev, &dev->driver_uar);
	if (err) {
		mthca_err(dev, "Failed to allocate driver access region, "
			  "aborting.\n");
		goto err_uar_table_free;
	}

	dev->kar = ioremap((phys_addr_t) dev->driver_uar.pfn << PAGE_SHIFT, PAGE_SIZE);
	if (!dev->kar) {
		mthca_err(dev, "Couldn't map kernel access region, "
			  "aborting.\n");
		err = -ENOMEM;
		goto err_uar_free;
	}

	err = mthca_init_pd_table(dev);
	if (err) {
		mthca_err(dev, "Failed to initialize "
			  "protection domain table, aborting.\n");
		goto err_kar_unmap;
	}

	err = mthca_init_mr_table(dev);
	if (err) {
		mthca_err(dev, "Failed to initialize "
			  "memory region table, aborting.\n");
		goto err_pd_table_free;
	}

	err = mthca_pd_alloc(dev, 1, &dev->driver_pd);
	if (err) {
		mthca_err(dev, "Failed to create driver PD, "
			  "aborting.\n");
		goto err_mr_table_free;
	}

	err = mthca_init_eq_table(dev);
	if (err) {
		mthca_err(dev, "Failed to initialize "
			  "event queue table, aborting.\n");
		goto err_pd_free;
	}

	err = mthca_cmd_use_events(dev);
	if (err) {
		mthca_err(dev, "Failed to switch to event-driven "
			  "firmware commands, aborting.\n");
		goto err_eq_table_free;
	}

	err = mthca_NOP(dev);
	if (err) {
		if (dev->mthca_flags & MTHCA_FLAG_MSI_X) {
			mthca_warn(dev, "NOP command failed to generate interrupt "
				   "(IRQ %d).\n",
				   dev->eq_table.eq[MTHCA_EQ_CMD].msi_x_vector);
			mthca_warn(dev, "Trying again with MSI-X disabled.\n");
		} else {
			mthca_err(dev, "NOP command failed to generate interrupt "
				  "(IRQ %d), aborting.\n",
				  dev->pdev->irq);
			mthca_err(dev, "BIOS or ACPI interrupt routing problem?\n");
		}

		goto err_cmd_poll;
	}

	mthca_dbg(dev, "NOP command IRQ test passed\n");

	err = mthca_init_cq_table(dev);
	if (err) {
		mthca_err(dev, "Failed to initialize "
			  "completion queue table, aborting.\n");
		goto err_cmd_poll;
	}

	err = mthca_init_srq_table(dev);
	if (err) {
		mthca_err(dev, "Failed to initialize "
			  "shared receive queue table, aborting.\n");
		goto err_cq_table_free;
	}

	err = mthca_init_qp_table(dev);
	if (err) {
		mthca_err(dev, "Failed to initialize "
			  "queue pair table, aborting.\n");
		goto err_srq_table_free;
	}

	err = mthca_init_av_table(dev);
	if (err) {
		mthca_err(dev, "Failed to initialize "
			  "address vector table, aborting.\n");
		goto err_qp_table_free;
	}

	err = mthca_init_mcg_table(dev);
	if (err) {
		mthca_err(dev, "Failed to initialize "
			  "multicast group table, aborting.\n");
		goto err_av_table_free;
	}

	return 0;

err_av_table_free:
	mthca_cleanup_av_table(dev);

err_qp_table_free:
	mthca_cleanup_qp_table(dev);

err_srq_table_free:
	mthca_cleanup_srq_table(dev);

err_cq_table_free:
	mthca_cleanup_cq_table(dev);

err_cmd_poll:
	mthca_cmd_use_polling(dev);

err_eq_table_free:
	mthca_cleanup_eq_table(dev);

err_pd_free:
	mthca_pd_free(dev, &dev->driver_pd);

err_mr_table_free:
	mthca_cleanup_mr_table(dev);

err_pd_table_free:
	mthca_cleanup_pd_table(dev);

err_kar_unmap:
	iounmap(dev->kar);

err_uar_free:
	mthca_uar_free(dev, &dev->driver_uar);

err_uar_table_free:
	mthca_cleanup_uar_table(dev);
	return err;
}

static int mthca_enable_msi_x(struct mthca_dev *mdev)
{
	struct msix_entry entries[3];
	int err;

	entries[0].entry = 0;
	entries[1].entry = 1;
	entries[2].entry = 2;

	err = pci_enable_msix(mdev->pdev, entries, ARRAY_SIZE(entries));
	if (err) {
		if (err > 0)
			mthca_info(mdev, "Only %d MSI-X vectors available, "
				   "not using MSI-X\n", err);
		return err;
	}

	mdev->eq_table.eq[MTHCA_EQ_COMP ].msi_x_vector = entries[0].vector;
	mdev->eq_table.eq[MTHCA_EQ_ASYNC].msi_x_vector = entries[1].vector;
	mdev->eq_table.eq[MTHCA_EQ_CMD  ].msi_x_vector = entries[2].vector;

	return 0;
}

/* Types of supported HCA */
enum {
	TAVOR,			/* MT23108                        */
	ARBEL_COMPAT,		/* MT25208 in Tavor compat mode   */
	ARBEL_NATIVE,		/* MT25208 with extended features */
	SINAI			/* MT25204 */
};

#define MTHCA_FW_VER(major, minor, subminor) \
	(((u64) (major) << 32) | ((u64) (minor) << 16) | (u64) (subminor))

static struct {
	u64 latest_fw;
	u32 flags;
} mthca_hca_table[] = {
	[TAVOR]        = { .latest_fw = MTHCA_FW_VER(3, 5, 0),
			   .flags     = 0 },
	[ARBEL_COMPAT] = { .latest_fw = MTHCA_FW_VER(4, 8, 200),
			   .flags     = MTHCA_FLAG_PCIE },
	[ARBEL_NATIVE] = { .latest_fw = MTHCA_FW_VER(5, 3, 0),
			   .flags     = MTHCA_FLAG_MEMFREE |
					MTHCA_FLAG_PCIE },
	[SINAI]        = { .latest_fw = MTHCA_FW_VER(1, 2, 0),
			   .flags     = MTHCA_FLAG_MEMFREE |
					MTHCA_FLAG_PCIE    |
					MTHCA_FLAG_SINAI_OPT }
};

static int __mthca_init_one(struct pci_dev *pdev, int hca_type)
{
	int ddr_hidden = 0;
	int err;
	struct mthca_dev *mdev;

	printk(KERN_INFO PFX "Initializing %s\n",
	       pci_name(pdev));

	err = pci_enable_device(pdev);
	if (err) {
		dev_err(&pdev->dev, "Cannot enable PCI device, "
			"aborting.\n");
		return err;
	}

	/*
	 * Check for BARs.  We expect 0: 1MB, 2: 8MB, 4: DDR (may not
	 * be present)
	 */
	if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM) ||
	    pci_resource_len(pdev, 0) != 1 << 20) {
		dev_err(&pdev->dev, "Missing DCS, aborting.\n");
		err = -ENODEV;
		goto err_disable_pdev;
	}
	if (!(pci_resource_flags(pdev, 2) & IORESOURCE_MEM)) {
		dev_err(&pdev->dev, "Missing UAR, aborting.\n");
		err = -ENODEV;
		goto err_disable_pdev;
	}
	if (!(pci_resource_flags(pdev, 4) & IORESOURCE_MEM))
		ddr_hidden = 1;

	err = pci_request_regions(pdev, DRV_NAME);
	if (err) {
		dev_err(&pdev->dev, "Cannot obtain PCI resources, "
			"aborting.\n");
		goto err_disable_pdev;
	}

	pci_set_master(pdev);

	err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
	if (err) {
		dev_warn(&pdev->dev, "Warning: couldn't set 64-bit PCI DMA mask.\n");
		err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
		if (err) {
			dev_err(&pdev->dev, "Can't set PCI DMA mask, aborting.\n");
			goto err_free_res;
		}
	}
	err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
	if (err) {
		dev_warn(&pdev->dev, "Warning: couldn't set 64-bit "
			 "consistent PCI DMA mask.\n");
		err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
		if (err) {
			dev_err(&pdev->dev, "Can't set consistent PCI DMA mask, "
				"aborting.\n");
			goto err_free_res;
		}
	}

	/* We can handle large RDMA requests, so allow larger segments. */
	dma_set_max_seg_size(&pdev->dev, 1024 * 1024 * 1024);

	mdev = (struct mthca_dev *) ib_alloc_device(sizeof *mdev);
	if (!mdev) {
		dev_err(&pdev->dev, "Device struct alloc failed, "
			"aborting.\n");
		err = -ENOMEM;
		goto err_free_res;
	}

	mdev->pdev = pdev;

	mdev->mthca_flags = mthca_hca_table[hca_type].flags;
	if (ddr_hidden)
		mdev->mthca_flags |= MTHCA_FLAG_DDR_HIDDEN;

	/*
	 * Now reset the HCA before we touch the PCI capabilities or
	 * attempt a firmware command, since a boot ROM may have left
	 * the HCA in an undefined state.
	 */
	err = mthca_reset(mdev);
	if (err) {
		mthca_err(mdev, "Failed to reset HCA, aborting.\n");
		goto err_free_dev;
	}

	if (mthca_cmd_init(mdev)) {
		mthca_err(mdev, "Failed to init command interface, aborting.\n");
		goto err_free_dev;
	}

	err = mthca_tune_pci(mdev);
	if (err)
		goto err_cmd;

	err = mthca_init_hca(mdev);
	if (err)
		goto err_cmd;

	if (mdev->fw_ver < mthca_hca_table[hca_type].latest_fw) {
		mthca_warn(mdev, "HCA FW version %d.%d.%03d is old (%d.%d.%03d is current).\n",
			   (int) (mdev->fw_ver >> 32), (int) (mdev->fw_ver >> 16) & 0xffff,
			   (int) (mdev->fw_ver & 0xffff),
			   (int) (mthca_hca_table[hca_type].latest_fw >> 32),
			   (int) (mthca_hca_table[hca_type].latest_fw >> 16) & 0xffff,
			   (int) (mthca_hca_table[hca_type].latest_fw & 0xffff));
		mthca_warn(mdev, "If you have problems, try updating your HCA FW.\n");
	}

	if (msi_x && !mthca_enable_msi_x(mdev))
		mdev->mthca_flags |= MTHCA_FLAG_MSI_X;

	err = mthca_setup_hca(mdev);
	if (err == -EBUSY && (mdev->mthca_flags & MTHCA_FLAG_MSI_X)) {
		if (mdev->mthca_flags & MTHCA_FLAG_MSI_X)
			pci_disable_msix(pdev);
		mdev->mthca_flags &= ~MTHCA_FLAG_MSI_X;

		err = mthca_setup_hca(mdev);
	}

	if (err)
		goto err_close;

	err = mthca_register_device(mdev);
	if (err)
		goto err_cleanup;

	err = mthca_create_agents(mdev);
	if (err)
		goto err_unregister;

	pci_set_drvdata(pdev, mdev);
	mdev->hca_type = hca_type;

	mdev->active = true;

	return 0;

err_unregister:
	mthca_unregister_device(mdev);

err_cleanup:
	mthca_cleanup_mcg_table(mdev);
	mthca_cleanup_av_table(mdev);
	mthca_cleanup_qp_table(mdev);
	mthca_cleanup_srq_table(mdev);
	mthca_cleanup_cq_table(mdev);
	mthca_cmd_use_polling(mdev);
	mthca_cleanup_eq_table(mdev);

	mthca_pd_free(mdev, &mdev->driver_pd);

	mthca_cleanup_mr_table(mdev);
	mthca_cleanup_pd_table(mdev);
	mthca_cleanup_uar_table(mdev);

err_close:
	if (mdev->mthca_flags & MTHCA_FLAG_MSI_X)
		pci_disable_msix(pdev);

	mthca_close_hca(mdev);

err_cmd:
	mthca_cmd_cleanup(mdev);

err_free_dev:
	ib_dealloc_device(&mdev->ib_dev);

err_free_res:
	pci_release_regions(pdev);

err_disable_pdev:
	pci_disable_device(pdev);
	pci_set_drvdata(pdev, NULL);
	return err;
}

static void __mthca_remove_one(struct pci_dev *pdev)
{
	struct mthca_dev *mdev = pci_get_drvdata(pdev);
	int p;

	if (mdev) {
		mthca_free_agents(mdev);
		mthca_unregister_device(mdev);

		for (p = 1; p <= mdev->limits.num_ports; ++p)
			mthca_CLOSE_IB(mdev, p);

		mthca_cleanup_mcg_table(mdev);
		mthca_cleanup_av_table(mdev);
		mthca_cleanup_qp_table(mdev);
		mthca_cleanup_srq_table(mdev);
		mthca_cleanup_cq_table(mdev);
		mthca_cmd_use_polling(mdev);
		mthca_cleanup_eq_table(mdev);

		mthca_pd_free(mdev, &mdev->driver_pd);

		mthca_cleanup_mr_table(mdev);
		mthca_cleanup_pd_table(mdev);

		iounmap(mdev->kar);
		mthca_uar_free(mdev, &mdev->driver_uar);
		mthca_cleanup_uar_table(mdev);
		mthca_close_hca(mdev);
		mthca_cmd_cleanup(mdev);

		if (mdev->mthca_flags & MTHCA_FLAG_MSI_X)
			pci_disable_msix(pdev);

		ib_dealloc_device(&mdev->ib_dev);
		pci_release_regions(pdev);
		pci_disable_device(pdev);
		pci_set_drvdata(pdev, NULL);
	}
}

int __mthca_restart_one(struct pci_dev *pdev)
{
	struct mthca_dev *mdev;
	int hca_type;

	mdev = pci_get_drvdata(pdev);
	if (!mdev)
		return -ENODEV;
	hca_type = mdev->hca_type;
	__mthca_remove_one(pdev);
	return __mthca_init_one(pdev, hca_type);
}

static int mthca_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
{
	int ret;

	mutex_lock(&mthca_device_mutex);

	printk_once(KERN_INFO "%s", mthca_version);

	if (id->driver_data >= ARRAY_SIZE(mthca_hca_table)) {
		printk(KERN_ERR PFX "%s has invalid driver data %lx\n",
		       pci_name(pdev), id->driver_data);
		mutex_unlock(&mthca_device_mutex);
		return -ENODEV;
	}

	ret = __mthca_init_one(pdev, id->driver_data);

	mutex_unlock(&mthca_device_mutex);

	return ret;
}

static void mthca_remove_one(struct pci_dev *pdev)
{
	mutex_lock(&mthca_device_mutex);
	__mthca_remove_one(pdev);
	mutex_unlock(&mthca_device_mutex);
}

static struct pci_device_id mthca_pci_table[] = {
	{ PCI_DEVICE(PCI_VENDOR_ID_MELLANOX, PCI_DEVICE_ID_MELLANOX_TAVOR),
	  .driver_data = TAVOR },
	{ PCI_DEVICE(PCI_VENDOR_ID_TOPSPIN, PCI_DEVICE_ID_MELLANOX_TAVOR),
	  .driver_data = TAVOR },
	{ PCI_DEVICE(PCI_VENDOR_ID_MELLANOX, PCI_DEVICE_ID_MELLANOX_ARBEL_COMPAT),
	  .driver_data = ARBEL_COMPAT },
	{ PCI_DEVICE(PCI_VENDOR_ID_TOPSPIN, PCI_DEVICE_ID_MELLANOX_ARBEL_COMPAT),
	  .driver_data = ARBEL_COMPAT },
	{ PCI_DEVICE(PCI_VENDOR_ID_MELLANOX, PCI_DEVICE_ID_MELLANOX_ARBEL),
	  .driver_data = ARBEL_NATIVE },
	{ PCI_DEVICE(PCI_VENDOR_ID_TOPSPIN, PCI_DEVICE_ID_MELLANOX_ARBEL),
	  .driver_data = ARBEL_NATIVE },
	{ PCI_DEVICE(PCI_VENDOR_ID_MELLANOX, PCI_DEVICE_ID_MELLANOX_SINAI),
	  .driver_data = SINAI },
	{ PCI_DEVICE(PCI_VENDOR_ID_TOPSPIN, PCI_DEVICE_ID_MELLANOX_SINAI),
	  .driver_data = SINAI },
	{ PCI_DEVICE(PCI_VENDOR_ID_MELLANOX, PCI_DEVICE_ID_MELLANOX_SINAI_OLD),
	  .driver_data = SINAI },
	{ PCI_DEVICE(PCI_VENDOR_ID_TOPSPIN, PCI_DEVICE_ID_MELLANOX_SINAI_OLD),
	  .driver_data = SINAI },
	{ 0, }
};

MODULE_DEVICE_TABLE(pci, mthca_pci_table);

static struct pci_driver mthca_driver = {
	.name		= DRV_NAME,
	.id_table	= mthca_pci_table,
	.probe		= mthca_init_one,
	.remove		= mthca_remove_one,
};

static void __init __mthca_check_profile_val(const char *name, int *pval,
					     int pval_default)
{
	/* value must be positive and power of 2 */
	int old_pval = *pval;

	if (old_pval <= 0)
		*pval = pval_default;
	else
		*pval = roundup_pow_of_two(old_pval);

	if (old_pval != *pval) {
		printk(KERN_WARNING PFX "Invalid value %d for %s in module parameter.\n",
		       old_pval, name);
		printk(KERN_WARNING PFX "Corrected %s to %d.\n", name, *pval);
	}
}

#define mthca_check_profile_val(name, default)				\
	__mthca_check_profile_val(#name, &hca_profile.name, default)

static void __init mthca_validate_profile(void)
{
	mthca_check_profile_val(num_qp,            MTHCA_DEFAULT_NUM_QP);
	mthca_check_profile_val(rdb_per_qp,        MTHCA_DEFAULT_RDB_PER_QP);
	mthca_check_profile_val(num_cq,            MTHCA_DEFAULT_NUM_CQ);
	mthca_check_profile_val(num_mcg, 	   MTHCA_DEFAULT_NUM_MCG);
	mthca_check_profile_val(num_mpt, 	   MTHCA_DEFAULT_NUM_MPT);
	mthca_check_profile_val(num_mtt, 	   MTHCA_DEFAULT_NUM_MTT);
	mthca_check_profile_val(num_udav,          MTHCA_DEFAULT_NUM_UDAV);
	mthca_check_profile_val(fmr_reserved_mtts, MTHCA_DEFAULT_NUM_RESERVED_MTTS);

	if (hca_profile.fmr_reserved_mtts >= hca_profile.num_mtt) {
		printk(KERN_WARNING PFX "Invalid fmr_reserved_mtts module parameter %d.\n",
		       hca_profile.fmr_reserved_mtts);
		printk(KERN_WARNING PFX "(Must be smaller than num_mtt %d)\n",
		       hca_profile.num_mtt);
		hca_profile.fmr_reserved_mtts = hca_profile.num_mtt / 2;
		printk(KERN_WARNING PFX "Corrected fmr_reserved_mtts to %d.\n",
		       hca_profile.fmr_reserved_mtts);
	}

	if ((log_mtts_per_seg < 1) || (log_mtts_per_seg > 5)) {
		printk(KERN_WARNING PFX "bad log_mtts_per_seg (%d). Using default - %d\n",
		       log_mtts_per_seg, ilog2(MTHCA_MTT_SEG_SIZE / 8));
		log_mtts_per_seg = ilog2(MTHCA_MTT_SEG_SIZE / 8);
	}
}

static int __init mthca_init(void)
{
	int ret;

	mthca_validate_profile();

	ret = mthca_catas_init();
	if (ret)
		return ret;

	ret = pci_register_driver(&mthca_driver);
	if (ret < 0) {
		mthca_catas_cleanup();
		return ret;
	}

	return 0;
}

static void __exit mthca_cleanup(void)
{
	pci_unregister_driver(&mthca_driver);
	mthca_catas_cleanup();
}

module_init(mthca_init);
module_exit(mthca_cleanup);