path: root/drivers/infiniband/hw/ehca/ehca_main.c

/*
 *  IBM eServer eHCA Infiniband device driver for Linux on POWER
 *
 *  module start stop, hca detection
 *
 *  Authors: Heiko J Schick <schickhj@de.ibm.com>
 *           Hoang-Nam Nguyen <hnguyen@de.ibm.com>
 *           Joachim Fenkes <fenkes@de.ibm.com>
 *
 *  Copyright (c) 2005 IBM Corporation
 *
 *  All rights reserved.
 *
 *  This source code is distributed under a dual license of GPL v2.0 and OpenIB
 *  BSD.
 *
 * OpenIB BSD License
 *
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#ifdef CONFIG_PPC_64K_PAGES
#include <linux/slab.h>
#endif

#include <linux/notifier.h>
#include <linux/memory.h>
#include "ehca_classes.h"
#include "ehca_iverbs.h"
#include "ehca_mrmw.h"
#include "ehca_tools.h"
#include "hcp_if.h"

#define HCAD_VERSION "0026"

MODULE_LICENSE("Dual BSD/GPL");
MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
MODULE_DESCRIPTION("IBM eServer HCA InfiniBand Device Driver");
MODULE_VERSION(HCAD_VERSION);

static int ehca_open_aqp1     = 0;
static int ehca_hw_level      = 0;
static int ehca_poll_all_eqs  = 1;

int ehca_debug_level   = 0;
int ehca_nr_ports      = 2;
int ehca_use_hp_mr     = 0;
int ehca_port_act_time = 30;
int ehca_static_rate   = -1;
int ehca_scaling_code  = 0;
int ehca_lock_hcalls   = -1;
int ehca_max_cq        = -1;
int ehca_max_qp        = -1;

module_param_named(open_aqp1,     ehca_open_aqp1,     bool, S_IRUGO);
module_param_named(debug_level,   ehca_debug_level,   int,  S_IRUGO);
module_param_named(hw_level,      ehca_hw_level,      int,  S_IRUGO);
module_param_named(nr_ports,      ehca_nr_ports,      int,  S_IRUGO);
module_param_named(use_hp_mr,     ehca_use_hp_mr,     bool, S_IRUGO);
module_param_named(port_act_time, ehca_port_act_time, int,  S_IRUGO);
module_param_named(poll_all_eqs,  ehca_poll_all_eqs,  bool, S_IRUGO);
module_param_named(static_rate,   ehca_static_rate,   int,  S_IRUGO);
module_param_named(scaling_code,  ehca_scaling_code,  bool, S_IRUGO);
module_param_named(lock_hcalls,   ehca_lock_hcalls,   bool, S_IRUGO);
module_param_named(number_of_cqs, ehca_max_cq,        int,  S_IRUGO);
module_param_named(number_of_qps, ehca_max_qp,        int,  S_IRUGO);

MODULE_PARM_DESC(open_aqp1,
		 "Open AQP1 on startup (default: no)");
MODULE_PARM_DESC(debug_level,
		 "Amount of debug output (0: none (default), 1: traces, "
		 "2: some dumps, 3: lots)");
MODULE_PARM_DESC(hw_level,
		 "Hardware level (0: autosensing (default), "
		 "0x10..0x14: eHCA, 0x20..0x23: eHCA2)");
MODULE_PARM_DESC(nr_ports,
		 "number of connected ports (-1: autodetect, 1: port one only, "
		 "2: two ports (default)");
MODULE_PARM_DESC(use_hp_mr,
		 "Use high performance MRs (default: no)");
MODULE_PARM_DESC(port_act_time,
		 "Time to wait for port activation (default: 30 sec)");
MODULE_PARM_DESC(poll_all_eqs,
		 "Poll all event queues periodically (default: yes)");
MODULE_PARM_DESC(static_rate,
		 "Set permanent static rate (default: no static rate)");
MODULE_PARM_DESC(scaling_code,
		 "Enable scaling code (default: no)");
MODULE_PARM_DESC(lock_hcalls,
		 "Serialize all hCalls made by the driver "
		 "(default: autodetect)");
MODULE_PARM_DESC(number_of_cqs,
		"Max number of CQs which can be allocated "
		"(default: autodetect)");
MODULE_PARM_DESC(number_of_qps,
		"Max number of QPs which can be allocated "
		"(default: autodetect)");

DEFINE_RWLOCK(ehca_qp_idr_lock);
DEFINE_RWLOCK(ehca_cq_idr_lock);
DEFINE_IDR(ehca_qp_idr);
DEFINE_IDR(ehca_cq_idr);

static LIST_HEAD(shca_list); /* list of all registered ehcas */
static DEFINE_SPINLOCK(shca_list_lock);

static struct timer_list poll_eqs_timer;

#ifdef CONFIG_PPC_64K_PAGES
static struct kmem_cache *ctblk_cache;

void *ehca_alloc_fw_ctrlblock(gfp_t flags)
{
	void *ret = kmem_cache_zalloc(ctblk_cache, flags);
	if (!ret)
		ehca_gen_err("Out of memory for ctblk");
	return ret;
}

void ehca_free_fw_ctrlblock(void *ptr)
{
	if (ptr)
		kmem_cache_free(ctblk_cache, ptr);

}
#endif

int ehca2ib_return_code(u64 ehca_rc)
{
	switch (ehca_rc) {
	case H_SUCCESS:
		return 0;
	case H_RESOURCE:             /* Resource in use */
	case H_BUSY:
		return -EBUSY;
	case H_NOT_ENOUGH_RESOURCES</