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84 lines
3.4 KiB
C
84 lines
3.4 KiB
C
/*
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* @File pvr_vmap.h
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* @Title Utility functions for virtual memory mapping
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* @Codingstyle LinuxKernel
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* @Copyright Copyright (c) Imagination Technologies Ltd. All Rights Reserved
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* @License Dual MIT/GPLv2
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*
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* The contents of this file are subject to the MIT license as set out below.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* Alternatively, the contents of this file may be used under the terms of
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* the GNU General Public License Version 2 ("GPL") in which case the provisions
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* of GPL are applicable instead of those above.
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*
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* If you wish to allow use of your version of this file only under the terms of
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* GPL, and not to allow others to use your version of this file under the terms
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* of the MIT license, indicate your decision by deleting the provisions above
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* and replace them with the notice and other provisions required by GPL as set
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* out in the file called "GPL-COPYING" included in this distribution. If you do
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* not delete the provisions above, a recipient may use your version of this file
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* under the terms of either the MIT license or GPL.
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*
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* This License is also included in this distribution in the file called
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* "MIT-COPYING".
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*
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* EXCEPT AS OTHERWISE STATED IN A NEGOTIATED AGREEMENT: (A) THE SOFTWARE IS
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* PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
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* BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
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* PURPOSE AND NONINFRINGEMENT; AND (B) IN NO EVENT SHALL THE AUTHORS OR
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* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#ifndef PVR_VMAP_H
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#define PVR_VMAP_H
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#include <linux/version.h>
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#include <linux/vmalloc.h>
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static inline void *pvr_vmap(struct page **pages,
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unsigned int count,
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__maybe_unused unsigned long flags,
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pgprot_t prot)
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{
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#if !defined(CONFIG_64BIT) || defined(PVRSRV_FORCE_SLOWER_VMAP_ON_64BIT_BUILDS)
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return vmap(pages, count, flags, prot);
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#elif (LINUX_VERSION_CODE < KERNEL_VERSION(5, 8, 0))
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return vm_map_ram(pages, count, -1, prot);
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#else
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if (pgprot_val(prot) == pgprot_val(PAGE_KERNEL))
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return vm_map_ram(pages, count, -1);
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else
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return vmap(pages, count, flags, prot);
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#endif /* !defined(CONFIG_64BIT) || defined(PVRSRV_FORCE_SLOWER_VMAP_ON_64BIT_BUILDS) */
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}
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static inline void pvr_vunmap(void *pages,
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__maybe_unused unsigned int count,
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__maybe_unused pgprot_t prot)
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{
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#if !defined(CONFIG_64BIT) || defined(PVRSRV_FORCE_SLOWER_VMAP_ON_64BIT_BUILDS)
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vunmap(pages);
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#elif (LINUX_VERSION_CODE < KERNEL_VERSION(5, 8, 0))
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vm_unmap_ram(pages, count);
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#else
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if (pgprot_val(prot) == pgprot_val(PAGE_KERNEL))
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vm_unmap_ram(pages, count);
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else
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vunmap(pages);
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#endif /* !defined(CONFIG_64BIT) || defined(PVRSRV_FORCE_SLOWER_VMAP_ON_64BIT_BUILDS) */
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}
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#endif /* PVR_VMAP_H */
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