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Release 4.11 drivers/ntb/ntb.c

Directory: drivers/ntb
/*
 * This file is provided under a dual BSD/GPLv2 license.  When using or
 *   redistributing this file, you may do so under either license.
 *
 *   GPL LICENSE SUMMARY
 *
 *   Copyright (C) 2015 EMC Corporation. All Rights Reserved.
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of version 2 of the GNU General Public License as
 *   published by the Free Software Foundation.
 *
 *   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.
 *
 *   BSD LICENSE
 *
 *   Copyright (C) 2015 EMC Corporation. All Rights Reserved.
 *
 *   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 copy
 *       notice, this list of conditions and the following disclaimer in
 *       the documentation and/or other materials provided with the
 *       distribution.
 *     * Neither the name of Intel Corporation nor the names of its
 *       contributors may be used to endorse or promote products derived
 *       from this software without specific prior written permission.
 *
 *   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.
 *
 * PCIe NTB Linux driver
 *
 * Contact Information:
 * Allen Hubbe <Allen.Hubbe@emc.com>
 */

#include <linux/device.h>
#include <linux/kernel.h>
#include <linux/module.h>

#include <linux/ntb.h>
#include <linux/pci.h>


#define DRIVER_NAME			"ntb"

#define DRIVER_DESCRIPTION		"PCIe NTB Driver Framework"


#define DRIVER_LICENSE			"Dual BSD/GPL"

#define DRIVER_VERSION			"1.0"

#define DRIVER_RELDATE			"24 March 2015"

#define DRIVER_AUTHOR			"Allen Hubbe <Allen.Hubbe@emc.com>"


MODULE_LICENSE(DRIVER_LICENSE);

MODULE_VERSION(DRIVER_VERSION);

MODULE_AUTHOR(DRIVER_AUTHOR);

MODULE_DESCRIPTION(DRIVER_DESCRIPTION);


static struct bus_type ntb_bus;
static void ntb_dev_release(struct device *dev);


int __ntb_register_client(struct ntb_client *client, struct module *mod, const char *mod_name) { if (!client) return -EINVAL; if (!ntb_client_ops_is_valid(&client->ops)) return -EINVAL; memset(&client->drv, 0, sizeof(client->drv)); client->drv.bus = &ntb_bus; client->drv.name = mod_name; client->drv.owner = mod; return driver_register(&client->drv); }

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Total95100.00%1100.00%

EXPORT_SYMBOL(__ntb_register_client);
void ntb_unregister_client(struct ntb_client *client) { driver_unregister(&client->drv); }

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EXPORT_SYMBOL(ntb_unregister_client);
int ntb_register_device(struct ntb_dev *ntb) { if (!ntb) return -EINVAL; if (!ntb->pdev) return -EINVAL; if (!ntb->ops) return -EINVAL; if (!ntb_dev_ops_is_valid(ntb->ops)) return -EINVAL; init_completion(&ntb->released); memset(&ntb->dev, 0, sizeof(ntb->dev)); ntb->dev.bus = &ntb_bus; ntb->dev.parent = &ntb->pdev->dev; ntb->dev.release = ntb_dev_release; dev_set_name(&ntb->dev, "%s", pci_name(ntb->pdev)); ntb->ctx = NULL; ntb->ctx_ops = NULL; spin_lock_init(&ntb->ctx_lock); return device_register(&ntb->dev); }

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Allen Hubbe15498.72%150.00%
Kees Cook21.28%150.00%
Total156100.00%2100.00%

EXPORT_SYMBOL(ntb_register_device);
void ntb_unregister_device(struct ntb_dev *ntb) { device_unregister(&ntb->dev); wait_for_completion(&ntb->released); }

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EXPORT_SYMBOL(ntb_unregister_device);
int ntb_set_ctx(struct ntb_dev *ntb, void *ctx, const struct ntb_ctx_ops *ctx_ops) { unsigned long irqflags; if (!ntb_ctx_ops_is_valid(ctx_ops)) return -EINVAL; if (ntb->ctx_ops) return -EINVAL; spin_lock_irqsave(&ntb->ctx_lock, irqflags); { ntb->ctx = ctx; ntb->ctx_ops = ctx_ops; } spin_unlock_irqrestore(&ntb->ctx_lock, irqflags); return 0; }

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EXPORT_SYMBOL(ntb_set_ctx);
void ntb_clear_ctx(struct ntb_dev *ntb) { unsigned long irqflags; spin_lock_irqsave(&ntb->ctx_lock, irqflags); { ntb->ctx_ops = NULL; ntb->ctx = NULL; } spin_unlock_irqrestore(&ntb->ctx_lock, irqflags); }

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Allen Hubbe48100.00%1100.00%
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EXPORT_SYMBOL(ntb_clear_ctx);
void ntb_link_event(struct ntb_dev *ntb) { unsigned long irqflags; spin_lock_irqsave(&ntb->ctx_lock, irqflags); { if (ntb->ctx_ops && ntb->ctx_ops->link_event) ntb->ctx_ops->link_event(ntb->ctx); } spin_unlock_irqrestore(&ntb->ctx_lock, irqflags); }

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EXPORT_SYMBOL(ntb_link_event);
void ntb_db_event(struct ntb_dev *ntb, int vector) { unsigned long irqflags; spin_lock_irqsave(&ntb->ctx_lock, irqflags); { if (ntb->ctx_ops && ntb->ctx_ops->db_event) ntb->ctx_ops->db_event(ntb->ctx, vector); } spin_unlock_irqrestore(&ntb->ctx_lock, irqflags); }

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Allen Hubbe64100.00%1100.00%
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EXPORT_SYMBOL(ntb_db_event);
static int ntb_probe(struct device *dev) { struct ntb_dev *ntb; struct ntb_client *client; int rc; get_device(dev); ntb = dev_ntb(dev); client = drv_ntb_client(dev->driver); rc = client->ops.probe(client, ntb); if (rc) put_device(dev); return rc; }

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Total70100.00%1100.00%


static int ntb_remove(struct device *dev) { struct ntb_dev *ntb; struct ntb_client *client; if (dev->driver) { ntb = dev_ntb(dev); client = drv_ntb_client(dev->driver); client->ops.remove(client, ntb); put_device(dev); } return 0; }

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static void ntb_dev_release(struct device *dev) { struct ntb_dev *ntb = dev_ntb(dev); complete(&ntb->released); }

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static struct bus_type ntb_bus = { .name = "ntb", .probe = ntb_probe, .remove = ntb_remove, };
static int __init ntb_driver_init(void) { return bus_register(&ntb_bus); }

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module_init(ntb_driver_init);
static void __exit ntb_driver_exit(void) { bus_unregister(&ntb_bus); }

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module_exit(ntb_driver_exit);

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Allen Hubbe88899.78%150.00%
Kees Cook20.22%150.00%
Total890100.00%2100.00%
Directory: drivers/ntb
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