freebsd-dev/sys/compat/linuxkpi/common/include/linux/preempt.h

/*-
 * Copyright (c) 2017 Mellanox Technologies, Ltd.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice unmodified, this list of conditions, and the following
 *    disclaimer.
 * 2. 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 AUTHOR ``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 AUTHOR 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.
 *
 * $FreeBSD$
 */

#ifndef _LINUX_PREEMPT_H_
#define	_LINUX_PREEMPT_H_

#include <linux/list.h>

#define	in_interrupt() \
	(curthread->td_intr_nesting_level || curthread->td_critnest)

#define	in_task() (curthread->td_priority >= PI_SOFT)

#define	preempt_disable()	critical_enter()
#define	preempt_enable()	critical_exit()

#endif					/* _LINUX_PREEMPT_H_ */
Implement a series of physical page management related functions in the LinuxKPI for accessing user-space memory in the kernel. Add functions to hold and wire physical page(s) based on a given range of user-space virtual addresses. Add functions to get and put a reference on, wire, hold, mark accessed, copy and dirty a physical page. Add new VM related structures and defines as a preparation step for advancing the memory map capabilities of the LinuxKPI. Add function to figure out if a virtual address was allocated using malloc(). Add function to convert a virtual kernel address into its physical page pointer. Obtained from: kmacy @ MFC after: 1 week Sponsored by: Mellanox Technologies 2017-03-27 17:04:11 +00:00			`/*-`
			`* Copyright (c) 2017 Mellanox Technologies, Ltd.`
			`* All rights reserved.`
			`*`
			`* Redistribution and use in source and binary forms, with or without`
			`* modification, are permitted provided that the following conditions`
			`* are met:`
			`* 1. Redistributions of source code must retain the above copyright`
			`* notice unmodified, this list of conditions, and the following`
			`* disclaimer.`
			`* 2. 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 AUTHOR ``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 AUTHOR 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.`
			`*`
			`* $FreeBSD$`
			`*/`

			`#ifndef _LINUX_PREEMPT_H_`
			`#define _LINUX_PREEMPT_H_`

			`#include <linux/list.h>`

			`#define in_interrupt() \`
			`(curthread->td_intr_nesting_level \|\| curthread->td_critnest)`

LinuxKPI: Add in_task macro. This patch is part of D19565 Reviewed by: hps, bwidawsk Approved by: imp (mentor), hps Obtained from: bwidawsk MFC after: 1 week 2019-05-16 21:07:37 +00:00			`#define in_task() (curthread->td_priority >= PI_SOFT)`

Add some miscellaneous definitions to support DRM drivers. Reviewed by: hselasky MFC after: 1 week Differential Revision: https://reviews.freebsd.org/D10985 2017-05-30 17:16:08 +00:00			`#define preempt_disable() critical_enter()`
			`#define preempt_enable() critical_exit()`

Implement a series of physical page management related functions in the LinuxKPI for accessing user-space memory in the kernel. Add functions to hold and wire physical page(s) based on a given range of user-space virtual addresses. Add functions to get and put a reference on, wire, hold, mark accessed, copy and dirty a physical page. Add new VM related structures and defines as a preparation step for advancing the memory map capabilities of the LinuxKPI. Add function to figure out if a virtual address was allocated using malloc(). Add function to convert a virtual kernel address into its physical page pointer. Obtained from: kmacy @ MFC after: 1 week Sponsored by: Mellanox Technologies 2017-03-27 17:04:11 +00:00			`#endif /* _LINUX_PREEMPT_H_ */`