[PATCH] IB uverbs: core implementation

/*

 * Copyright (c) 2005 Topspin Communications.  All rights reserved.

 * Copyright (c) 2005 Cisco Systems.  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: uverbs.h 2559 2005-06-06 19:43:16Z roland $

 */

#ifndef UVERBS_H

#define UVERBS_H

/* Include device.h and fs.h until cdev.h is self-sufficient */

#include <linux/fs.h>

#include <linux/device.h>

#include <linux/cdev.h>

#include <linux/kref.h>

#include <linux/idr.h>

#include <ib_verbs.h>

#include <ib_user_verbs.h>

struct ib_uverbs_device {

	int					devnum;

	struct cdev				dev;

	struct class_device			class_dev;

	struct ib_device		       *ib_dev;

	int					num_comp;

};

struct ib_uverbs_event_file {

	struct kref				ref;

	struct ib_uverbs_file		       *uverbs_file;

	spinlock_t				lock;

	int					fd;

	int					is_async;

	wait_queue_head_t			poll_wait;

	struct list_head			event_list;

};

struct ib_uverbs_file {

	struct kref				ref;

	struct ib_uverbs_device		       *device;

	struct ib_ucontext		       *ucontext;

	struct ib_event_handler			event_handler;

	struct ib_uverbs_event_file	        async_file;

	struct ib_uverbs_event_file	        comp_file[1];

};

struct ib_uverbs_async_event {

	struct ib_uverbs_async_event_desc	desc;

	struct list_head			list;

};

struct ib_uverbs_comp_event {

	struct ib_uverbs_comp_event_desc	desc;

	struct list_head			list;

};

struct ib_uobject_mr {

	struct ib_uobject			uobj;

	struct page			       *page_list;

	struct scatterlist		       *sg_list;

};

extern struct semaphore ib_uverbs_idr_mutex;

extern struct idr ib_uverbs_pd_idr;

extern struct idr ib_uverbs_mr_idr;

extern struct idr ib_uverbs_mw_idr;

extern struct idr ib_uverbs_ah_idr;

extern struct idr ib_uverbs_cq_idr;

extern struct idr ib_uverbs_qp_idr;

void ib_uverbs_comp_handler(struct ib_cq *cq, void *cq_context);

void ib_uverbs_cq_event_handler(struct ib_event *event, void *context_ptr);

void ib_uverbs_qp_event_handler(struct ib_event *event, void *context_ptr);

int ib_umem_get(struct ib_device *dev, struct ib_umem *mem,

		void *addr, size_t size, int write);

void ib_umem_release(struct ib_device *dev, struct ib_umem *umem);

void ib_umem_release_on_close(struct ib_device *dev, struct ib_umem *umem);

#define IB_UVERBS_DECLARE_CMD(name)					\

	ssize_t ib_uverbs_##name(struct ib_uverbs_file *file,		\

				 const char __user *buf, int in_len,	\

				 int out_len)

IB_UVERBS_DECLARE_CMD(query_params);

IB_UVERBS_DECLARE_CMD(get_context);

IB_UVERBS_DECLARE_CMD(query_device);

IB_UVERBS_DECLARE_CMD(query_port);

IB_UVERBS_DECLARE_CMD(query_gid);

IB_UVERBS_DECLARE_CMD(query_pkey);

IB_UVERBS_DECLARE_CMD(alloc_pd);

IB_UVERBS_DECLARE_CMD(dealloc_pd);

IB_UVERBS_DECLARE_CMD(reg_mr);

IB_UVERBS_DECLARE_CMD(dereg_mr);

IB_UVERBS_DECLARE_CMD(create_cq);

IB_UVERBS_DECLARE_CMD(destroy_cq);

IB_UVERBS_DECLARE_CMD(create_qp);

IB_UVERBS_DECLARE_CMD(modify_qp);

IB_UVERBS_DECLARE_CMD(destroy_qp);

IB_UVERBS_DECLARE_CMD(attach_mcast);

IB_UVERBS_DECLARE_CMD(detach_mcast);

#endif /* UVERBS_H */