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016017a195
Even if it's probably not really useful, it can get selected by e.g. randconfig builds, and then failing to compile is an annoyance. Unfortunately, it's hard to fix in Kconfig, since DRM_TTM is selected by many things that don't really depend on any specific architecture, and just depend on PCI (which is indeed now available in ARCH=um via simulation/emulation). Fix this in the code instead by just ifdef'ing the relevant two lines that depend on "real X86". Reported-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: https://patchwork.freedesktop.org/patch/msgid/20211220111519.a4c8c6eff702.Ie4cf4e68698f6a9f546b83379bc52c266504424f@changeid
92 lines
3.1 KiB
C
92 lines
3.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 OR MIT */
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/**************************************************************************
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*
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* Copyright (c) 2006-2009 VMware, Inc., Palo Alto, CA., USA
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
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* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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* USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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**************************************************************************/
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/*
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* Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com>
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* Jerome Glisse
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*/
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#include <linux/module.h>
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#include <linux/device.h>
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#include <linux/pgtable.h>
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#include <linux/sched.h>
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#include <linux/debugfs.h>
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#include <drm/drm_sysfs.h>
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#include <drm/ttm/ttm_caching.h>
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#include "ttm_module.h"
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/**
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* DOC: TTM
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*
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* TTM is a memory manager for accelerator devices with dedicated memory.
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*
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* The basic idea is that resources are grouped together in buffer objects of
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* certain size and TTM handles lifetime, movement and CPU mappings of those
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* objects.
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*
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* TODO: Add more design background and information here.
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*/
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/**
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* ttm_prot_from_caching - Modify the page protection according to the
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* ttm cacing mode
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* @caching: The ttm caching mode
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* @tmp: The original page protection
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*
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* Return: The modified page protection
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*/
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pgprot_t ttm_prot_from_caching(enum ttm_caching caching, pgprot_t tmp)
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{
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/* Cached mappings need no adjustment */
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if (caching == ttm_cached)
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return tmp;
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#if defined(__i386__) || defined(__x86_64__)
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if (caching == ttm_write_combined)
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tmp = pgprot_writecombine(tmp);
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#ifndef CONFIG_UML
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else if (boot_cpu_data.x86 > 3)
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tmp = pgprot_noncached(tmp);
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#endif /* CONFIG_UML */
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#endif /* __i386__ || __x86_64__ */
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#if defined(__ia64__) || defined(__arm__) || defined(__aarch64__) || \
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defined(__powerpc__) || defined(__mips__)
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if (caching == ttm_write_combined)
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tmp = pgprot_writecombine(tmp);
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else
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tmp = pgprot_noncached(tmp);
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#endif
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#if defined(__sparc__)
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tmp = pgprot_noncached(tmp);
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#endif
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return tmp;
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}
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MODULE_AUTHOR("Thomas Hellstrom, Jerome Glisse");
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MODULE_DESCRIPTION("TTM memory manager subsystem (for DRM device)");
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MODULE_LICENSE("GPL and additional rights");
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