c072f6e856
No functional changes intended Reviewed by: hselasky, manu, markj MFC after: 2 weeks Differential revision: https://reviews.freebsd.org/D32167
119 lines
3.0 KiB
C
119 lines
3.0 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2010 Isilon Systems, Inc.
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* Copyright (c) 2016 Matthew Macy (mmacy@mattmacy.io)
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* Copyright (c) 2017 Mellanox Technologies, Ltd.
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* Copyright (c) 2021 Vladimir Kondratyev <wulf@FreeBSD.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef _LINUX_HIGHMEM_H_
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#define _LINUX_HIGHMEM_H_
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#include <sys/types.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/proc.h>
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#include <sys/sched.h>
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#include <sys/sf_buf.h>
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#include <vm/vm.h>
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#include <vm/vm_page.h>
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#include <vm/pmap.h>
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#include <linux/page.h>
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#define PageHighMem(p) (0)
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static inline vm_page_t
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kmap_to_page(void *addr)
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{
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return (virt_to_page(addr));
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}
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static inline void *
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kmap(vm_page_t page)
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{
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struct sf_buf *sf;
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if (PMAP_HAS_DMAP) {
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return ((void *)PHYS_TO_DMAP(VM_PAGE_TO_PHYS(page)));
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} else {
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sched_pin();
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sf = sf_buf_alloc(page, SFB_NOWAIT | SFB_CPUPRIVATE);
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if (sf == NULL) {
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sched_unpin();
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return (NULL);
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}
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return ((void *)sf_buf_kva(sf));
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}
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}
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static inline void *
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kmap_atomic_prot(vm_page_t page, pgprot_t prot)
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{
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vm_memattr_t attr = pgprot2cachemode(prot);
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if (attr != VM_MEMATTR_DEFAULT) {
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vm_page_lock(page);
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page->flags |= PG_FICTITIOUS;
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vm_page_unlock(page);
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pmap_page_set_memattr(page, attr);
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}
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return (kmap(page));
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}
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static inline void *
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kmap_atomic(vm_page_t page)
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{
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return (kmap_atomic_prot(page, VM_PROT_ALL));
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}
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static inline void
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kunmap(vm_page_t page)
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{
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struct sf_buf *sf;
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if (!PMAP_HAS_DMAP) {
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/* lookup SF buffer in list */
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sf = sf_buf_alloc(page, SFB_NOWAIT | SFB_CPUPRIVATE);
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/* double-free */
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sf_buf_free(sf);
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sf_buf_free(sf);
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sched_unpin();
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}
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}
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static inline void
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kunmap_atomic(void *vaddr)
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{
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if (!PMAP_HAS_DMAP)
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kunmap(virt_to_page(vaddr));
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}
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#endif /* _LINUX_HIGHMEM_H_ */
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