linuxkpi: Move shmem related functions in it's own file
For drmkpi (D23085) we don't want the Linux struct file as we don't emulate everything. Also the prototypes should be in shmem_fs.h to have 100% compatibility with Linux. Reviewed by: hselasky MFC after: Maybe Differential Revision: https://reviews.freebsd.org/D23764
This commit is contained in:
Emmanuel Vadot
parent
f57ea22cc7
commit
1179b649cf
@ -302,25 +302,4 @@ call_mmap(struct linux_file *file, struct vm_area_struct *vma)
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return (file->f_op->mmap(file, vma));
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}
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/* Shared memory support */
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unsigned long linux_invalidate_mapping_pages(vm_object_t, pgoff_t, pgoff_t);
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struct page *linux_shmem_read_mapping_page_gfp(vm_object_t, int, gfp_t);
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struct linux_file *linux_shmem_file_setup(const char *, loff_t, unsigned long);
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void linux_shmem_truncate_range(vm_object_t, loff_t, loff_t);
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#define invalidate_mapping_pages(...) \
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linux_invalidate_mapping_pages(__VA_ARGS__)
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#define shmem_read_mapping_page(...) \
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linux_shmem_read_mapping_page_gfp(__VA_ARGS__, 0)
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#define shmem_read_mapping_page_gfp(...) \
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linux_shmem_read_mapping_page_gfp(__VA_ARGS__)
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#define shmem_file_setup(...) \
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linux_shmem_file_setup(__VA_ARGS__)
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#define shmem_truncate_range(...) \
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linux_shmem_truncate_range(__VA_ARGS__)
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#endif /* _LINUX_FS_H_ */
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55
sys/compat/linuxkpi/common/include/linux/shmem_fs.h
Normal file
55
sys/compat/linuxkpi/common/include/linux/shmem_fs.h
Normal file
@ -0,0 +1,55 @@
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/*-
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* Copyright (c) 2010 Isilon Systems, Inc.
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* Copyright (c) 2010 iX Systems, Inc.
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* Copyright (c) 2010 Panasas, Inc.
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* Copyright (c) 2013-2018 Mellanox Technologies, Ltd.
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* All rights reserved.
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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
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice unmodified, this list of conditions, and the following
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* 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 the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _LINUX_SHMEM_FS_H_
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#define _LINUX_SHMEM_FS_H_
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/* Shared memory support */
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unsigned long linux_invalidate_mapping_pages(vm_object_t, pgoff_t, pgoff_t);
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struct page *linux_shmem_read_mapping_page_gfp(vm_object_t, int, gfp_t);
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struct linux_file *linux_shmem_file_setup(const char *, loff_t, unsigned long);
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void linux_shmem_truncate_range(vm_object_t, loff_t, loff_t);
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#define invalidate_mapping_pages(...) \
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linux_invalidate_mapping_pages(__VA_ARGS__)
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#define shmem_read_mapping_page(...) \
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linux_shmem_read_mapping_page_gfp(__VA_ARGS__, 0)
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#define shmem_read_mapping_page_gfp(...) \
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linux_shmem_read_mapping_page_gfp(__VA_ARGS__)
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#define shmem_file_setup(...) \
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linux_shmem_file_setup(__VA_ARGS__)
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#define shmem_truncate_range(...) \
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linux_shmem_truncate_range(__VA_ARGS__)
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#endif /* _LINUX_SHMEM_FS_H_ */
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@ -62,6 +62,7 @@ __FBSDID("$FreeBSD$");
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#include <linux/mm.h>
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#include <linux/preempt.h>
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#include <linux/fs.h>
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#include <linux/shmem_fs.h>
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void
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si_meminfo(struct sysinfo *si)
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@ -275,86 +276,3 @@ is_vmalloc_addr(const void *addr)
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{
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return (vtoslab((vm_offset_t)addr & ~UMA_SLAB_MASK) != NULL);
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}
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struct page *
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linux_shmem_read_mapping_page_gfp(vm_object_t obj, int pindex, gfp_t gfp)
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{
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vm_page_t page;
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int rv;
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if ((gfp & GFP_NOWAIT) != 0)
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panic("GFP_NOWAIT is unimplemented");
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VM_OBJECT_WLOCK(obj);
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rv = vm_page_grab_valid(&page, obj, pindex, VM_ALLOC_NORMAL |
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VM_ALLOC_NOBUSY | VM_ALLOC_WIRED);
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VM_OBJECT_WUNLOCK(obj);
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if (rv != VM_PAGER_OK)
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return (ERR_PTR(-EINVAL));
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return (page);
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}
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struct linux_file *
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linux_shmem_file_setup(const char *name, loff_t size, unsigned long flags)
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{
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struct fileobj {
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struct linux_file file __aligned(sizeof(void *));
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struct vnode vnode __aligned(sizeof(void *));
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};
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struct fileobj *fileobj;
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struct linux_file *filp;
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struct vnode *vp;
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int error;
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fileobj = kzalloc(sizeof(*fileobj), GFP_KERNEL);
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if (fileobj == NULL) {
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error = -ENOMEM;
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goto err_0;
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}
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filp = &fileobj->file;
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vp = &fileobj->vnode;
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filp->f_count = 1;
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filp->f_vnode = vp;
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filp->f_shmem = vm_pager_allocate(OBJT_DEFAULT, NULL, size,
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VM_PROT_READ | VM_PROT_WRITE, 0, curthread->td_ucred);
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if (filp->f_shmem == NULL) {
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error = -ENOMEM;
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goto err_1;
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}
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return (filp);
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err_1:
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kfree(filp);
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err_0:
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return (ERR_PTR(error));
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}
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static vm_ooffset_t
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linux_invalidate_mapping_pages_sub(vm_object_t obj, vm_pindex_t start,
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vm_pindex_t end, int flags)
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{
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int start_count, end_count;
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VM_OBJECT_WLOCK(obj);
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start_count = obj->resident_page_count;
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vm_object_page_remove(obj, start, end, flags);
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end_count = obj->resident_page_count;
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VM_OBJECT_WUNLOCK(obj);
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return (start_count - end_count);
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}
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unsigned long
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linux_invalidate_mapping_pages(vm_object_t obj, pgoff_t start, pgoff_t end)
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{
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return (linux_invalidate_mapping_pages_sub(obj, start, end, OBJPR_CLEANONLY));
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}
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void
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linux_shmem_truncate_range(vm_object_t obj, loff_t lstart, loff_t lend)
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{
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vm_pindex_t start = OFF_TO_IDX(lstart + PAGE_SIZE - 1);
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vm_pindex_t end = OFF_TO_IDX(lend + 1);
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(void) linux_invalidate_mapping_pages_sub(obj, start, end, 0);
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}
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128
sys/compat/linuxkpi/common/src/linux_shmemfs.c
Normal file
128
sys/compat/linuxkpi/common/src/linux_shmemfs.c
Normal file
@ -0,0 +1,128 @@
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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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* All rights reserved.
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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
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice unmodified, this list of conditions, and the following
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* 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 the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/rwlock.h>
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#include <vm/vm.h>
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#include <vm/pmap.h>
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#include <vm/vm_object.h>
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#include <vm/vm_map.h>
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#include <vm/vm_page.h>
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#include <vm/vm_pager.h>
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#include <linux/fs.h>
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#include <linux/mm.h>
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#include <linux/shmem_fs.h>
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struct page *
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linux_shmem_read_mapping_page_gfp(vm_object_t obj, int pindex, gfp_t gfp)
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{
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vm_page_t page;
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int rv;
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if ((gfp & GFP_NOWAIT) != 0)
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panic("GFP_NOWAIT is unimplemented");
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VM_OBJECT_WLOCK(obj);
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rv = vm_page_grab_valid(&page, obj, pindex, VM_ALLOC_NORMAL |
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VM_ALLOC_NOBUSY | VM_ALLOC_WIRED);
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VM_OBJECT_WUNLOCK(obj);
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if (rv != VM_PAGER_OK)
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return (ERR_PTR(-EINVAL));
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return (page);
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}
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struct linux_file *
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linux_shmem_file_setup(const char *name, loff_t size, unsigned long flags)
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{
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struct fileobj {
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struct linux_file file __aligned(sizeof(void *));
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struct vnode vnode __aligned(sizeof(void *));
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};
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struct fileobj *fileobj;
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struct linux_file *filp;
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struct vnode *vp;
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int error;
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fileobj = kzalloc(sizeof(*fileobj), GFP_KERNEL);
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if (fileobj == NULL) {
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error = -ENOMEM;
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goto err_0;
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}
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filp = &fileobj->file;
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vp = &fileobj->vnode;
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filp->f_count = 1;
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filp->f_vnode = vp;
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filp->f_shmem = vm_pager_allocate(OBJT_DEFAULT, NULL, size,
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VM_PROT_READ | VM_PROT_WRITE, 0, curthread->td_ucred);
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if (filp->f_shmem == NULL) {
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error = -ENOMEM;
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goto err_1;
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}
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return (filp);
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err_1:
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kfree(filp);
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err_0:
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return (ERR_PTR(error));
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}
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static vm_ooffset_t
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linux_invalidate_mapping_pages_sub(vm_object_t obj, vm_pindex_t start,
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vm_pindex_t end, int flags)
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{
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int start_count, end_count;
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VM_OBJECT_WLOCK(obj);
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start_count = obj->resident_page_count;
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vm_object_page_remove(obj, start, end, flags);
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end_count = obj->resident_page_count;
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VM_OBJECT_WUNLOCK(obj);
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return (start_count - end_count);
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}
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unsigned long
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linux_invalidate_mapping_pages(vm_object_t obj, pgoff_t start, pgoff_t end)
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{
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return (linux_invalidate_mapping_pages_sub(obj, start, end, OBJPR_CLEANONLY));
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}
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void
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linux_shmem_truncate_range(vm_object_t obj, loff_t lstart, loff_t lend)
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{
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vm_pindex_t start = OFF_TO_IDX(lstart + PAGE_SIZE - 1);
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vm_pindex_t end = OFF_TO_IDX(lend + 1);
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(void) linux_invalidate_mapping_pages_sub(obj, start, end, 0);
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}
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@ -4476,6 +4476,8 @@ compat/linuxkpi/common/src/linux_rcu.c optional compat_linuxkpi \
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compile-with "${LINUXKPI_C} -I$S/contrib/ck/include"
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compat/linuxkpi/common/src/linux_schedule.c optional compat_linuxkpi \
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compile-with "${LINUXKPI_C}"
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compat/linuxkpi/common/src/linux_shmemfs.c optional compat_linuxkpi \
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compile-with "${LINUXKPI_C}"
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compat/linuxkpi/common/src/linux_slab.c optional compat_linuxkpi \
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compile-with "${LINUXKPI_C}"
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compat/linuxkpi/common/src/linux_usb.c optional compat_linuxkpi usb \
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@ -15,6 +15,7 @@ SRCS= linux_compat.c \
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linux_rcu.c \
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linux_seq_file.c \
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linux_schedule.c \
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linux_shmemfs.c \
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linux_slab.c \
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linux_tasklet.c \
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linux_usb.c \
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