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b99bc86232
The code comes from the i915 DRM driver. In Linux commits b739f125e4ebd73d10ed30a856574e13649119ed and b12d691ea5e01db42ccf3b4207e57cb3ce7cfe91 (Linux 5.13), the i915 DRM driver dropped specific implementations to use Linux generic functions. Therefore I moved the FreeBSD code from that i915 driver to linuxkpi. However, these commits were later reverted (also in Linux 5.13) so the i915 driver doesn't use these functions. But perhaps it will help in the future. To sum up, the code comes from the i915 DRM driver but it doesn't use it (i.e. it continues to use its internal implementation). Reviewed by: manu Approved by: manu Differential Revision: https://reviews.freebsd.org/D38088
120 lines
3.3 KiB
C
120 lines
3.3 KiB
C
/*-
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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, 2014 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 _LINUXKPI_LINUX_IO_MAPPING_H_
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#define _LINUXKPI_LINUX_IO_MAPPING_H_
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#include <sys/types.h>
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#include <machine/vm.h>
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#include <linux/types.h>
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#include <linux/io.h>
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#include <linux/mm.h>
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#include <linux/slab.h>
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struct io_mapping {
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unsigned long base;
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unsigned long size;
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void *mem;
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vm_memattr_t attr;
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};
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struct io_mapping *io_mapping_create_wc(resource_size_t base, unsigned long size);
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static inline struct io_mapping *
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io_mapping_init_wc(struct io_mapping *mapping, resource_size_t base,
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unsigned long size)
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{
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mapping->base = base;
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mapping->size = size;
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#ifdef VM_MEMATTR_WRITE_COMBINING
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mapping->mem = ioremap_wc(base, size);
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mapping->attr = VM_MEMATTR_WRITE_COMBINING;
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#else
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mapping->mem = ioremap_nocache(base, size);
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mapping->attr = VM_MEMATTR_UNCACHEABLE;
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#endif
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return (mapping);
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}
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static inline void
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io_mapping_fini(struct io_mapping *mapping)
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{
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iounmap(mapping->mem);
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}
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static inline void
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io_mapping_free(struct io_mapping *mapping)
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{
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io_mapping_fini(mapping->mem);
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kfree(mapping);
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}
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static inline void *
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io_mapping_map_atomic_wc(struct io_mapping *mapping, unsigned long offset)
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{
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return ((char *)mapping->mem + offset);
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}
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static inline void
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io_mapping_unmap_atomic(void *vaddr)
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{
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}
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static inline void *
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io_mapping_map_wc(struct io_mapping *mapping, unsigned long offset,
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unsigned long size)
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{
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return ((char *)mapping->mem + offset);
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}
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int lkpi_io_mapping_map_user(struct io_mapping *iomap,
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struct vm_area_struct *vma, unsigned long addr, unsigned long pfn,
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unsigned long size);
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static inline int
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io_mapping_map_user(struct io_mapping *iomap, struct vm_area_struct *vma,
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unsigned long addr, unsigned long pfn, unsigned long size)
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{
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return (lkpi_io_mapping_map_user(iomap, vma, addr, pfn, size));
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}
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static inline void
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io_mapping_unmap(void *vaddr)
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{
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}
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#endif /* _LINUXKPI_LINUX_IO_MAPPING_H_ */
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