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# Doxyfile 1.3.8

# This file describes the settings to be used by the documentation system
# doxygen (www.doxygen.org) for a project
#
# All text after a hash (#) is considered a comment and will be ignored
# The format is:
#       TAG = value [value, ...]
# For lists items can also be appended using:
#       TAG += value [value, ...]
# Values that contain spaces should be placed between quotes (" ")

#---------------------------------------------------------------------------
# Project related configuration options
#---------------------------------------------------------------------------

# The PROJECT_NAME tag is a single word (or a sequence of words surrounded 
# by quotes) that should identify the project.

PROJECT_NAME           = "Direct Rendering Module"

# The PROJECT_NUMBER tag can be used to enter a project or revision number. 
# This could be handy for archiving the generated documentation or 
# if some version control system is used.

PROJECT_NUMBER         = 

# The OUTPUT_DIRECTORY tag is used to specify the (relative or absolute) 
# base path where the generated documentation will be put. 
# If a relative path is entered, it will be relative to the location 
# where doxygen was started. If left blank the current directory will be used.

OUTPUT_DIRECTORY       = 

# If the CREATE_SUBDIRS tag is set to YES, then doxygen will create 
# 4096 sub-directories (in 2 levels) under the output directory of each output 
# format and will distribute the generated files over these directories. 
# Enabling this option can be useful when feeding doxygen a huge amount of source 
# files, where putting all generated files in the same directory would otherwise 
# cause performance problems for the file system.

CREATE_SUBDIRS         = NO

# The OUTPUT_LANGUAGE tag is used to specify the language in which all 
# documentation generated by doxygen is written. Doxygen will use this 
# information to generate all constant output in the proper language. 
# The default language is English, other supported languages are: 
# Brazilian, Catalan, Chinese, Chinese-Traditional, Croatian, Czech, Danish, 
# Dutch, Finnish, French, German, Greek, Hungarian, Italian, Japanese, 
# Japanese-en (Japanese with English messages), Korean, Korean-en, Norwegian, 
# Polish, Portuguese, Romanian, Russian, Serbian, Slovak, Slovene, Spanish, 
# Swedish, and Ukrainian.

OUTPUT_LANGUAGE        = English

# This tag can be used to specify the encoding used in the generated output. 
# The encoding is not always determined by the language that is chosen, 
# but also whether or not the output is meant for Windows or non-Windows users. 
# In case there is a difference, setting the USE_WINDOWS_ENCODING tag to YES 
# forces the Windows encoding (this is the default for the Windows binary), 
# whereas setting the tag to NO uses a Unix-style encoding (the default for 
# all platforms other than Windows).

USE_WINDOWS_ENCODING   = NO

# If the BRIEF_MEMBER_DESC tag is set to YES (the default) Doxygen will 
# include brief member descriptions after the members that are listed in 
# the file and class documentation (similar to JavaDoc). 
# Set to NO to disable this.

BRIEF_MEMBER_DESC      = YES

# If the REPEAT_BRIEF tag is set to YES (the default) Doxygen will prepend 
# the brief description of a member or function before the detailed description. 
# Note: if both HIDE_UNDOC_MEMBERS and BRIEF_MEMBER_DESC are set to NO, the 
# brief descriptions will be completely suppressed.

REPEAT_BRIEF           = YES

# This tag implements a quasi-intelligent brief description abbreviator 
# that is used to form the text in various listings. Each string 
# in this list, if found as the leading text of the brief description, will be 
# stripped from the text and the result after processing the whole list, is used 
# as the annotated text. Otherwise, the brief description is used as-is. If left 
# blank, the following values are used ("$name" is automatically replaced with the 
# name of the entity): "The $name class" "The $name widget" "The $name file" 
# "is" "provides" "specifies" "contains" "represents" "a" "an" "the"

ABBREVIATE_BRIEF       = 

# If the ALWAYS_DETAILED_SEC and REPEAT_BRIEF tags are both set to YES then 
# Doxygen will generate a detailed section even if there is only a brief 
# description.

ALWAYS_DETAILED_SEC    = NO

# If the INLINE_INHERITED_MEMB tag is set to YES, doxygen will show all inherited 
# members of a class in the documentation of that class as if those members were 
# ordinary class members. Constructors, destructors and assignment operators of 
# the base classes will not be shown.

INLINE_INHERITED_MEMB  = NO

# If the FULL_PATH_NAMES tag is set to YES then Doxygen will prepend the full 
# path before files name in the file list and in the header files. If set 
# to NO the shortest path that makes the file name unique will be used.

FULL_PATH_NAMES        = NO

# If the FULL_PATH_NAMES tag is set to YES then the STRIP_FROM_PATH tag 
# can be used to strip a user-defined part of the path. Stripping is 
# only done if one of the specified strings matches the left-hand part of 
# the path. The tag can be used to show relative paths in the file list. 
# If left blank the directory from which doxygen is run is used as the 
# path to strip.

STRIP_FROM_PATH        = 

# The STRIP_FROM_INC_PATH tag can be used to strip a user-defined part of 
# the path mentioned in the documentation of a class, which tells 
# the reader which header file to include in order to use a class. 
# If left blank only the name of the header file containing the class 
# definition is used. Otherwise one should specify the include paths that 
# are normally passed to the compiler using the -I flag.

STRIP_FROM_INC_PATH    = 

# If the SHORT_NAMES tag is set to YES, doxygen will generate much shorter 
# (but less readable) file names. This can be useful is your file systems 
# doesn't support long names like on DOS, Mac, or CD-ROM.

SHORT_NAMES            = NO

# If the JAVADOC_AUTOBRIEF tag is set to YES then Doxygen 
# will interpret the first line (until the first dot) of a JavaDoc-style 
# comment as the brief description. If set to NO, the JavaDoc 
# comments will behave just like the Qt-style comments (thus requiring an 
# explicit @brief command for a brief description.

JAVADOC_AUTOBRIEF      = YES

# The MULTILINE_CPP_IS_BRIEF tag can be set to YES to make Doxygen 
# treat a multi-line C++ special comment block (i.e. a block of //! or /// 
# comments) as a brief description. This used to be the default behaviour. 
# The new default is to treat a multi-line C++ comment block as a detailed 
# description. Set this tag to YES if you prefer the old behaviour instead.

MULTILINE_CPP_IS_BRIEF = NO

# If the DETAILS_AT_TOP tag is set to YES then Doxygen 
# will output the detailed description near the top, like JavaDoc.
# If set to NO, the detailed description appears after the member 
# documentation.

DETAILS_AT_TOP         = YES

# If the INHERIT_DOCS tag is set to YES (the default) then an undocumented 
# member inherits the documentation from any documented member that it 
# re-implements.

INHERIT_DOCS           = YES

# If member grouping is used in the documentation and the DISTRIBUTE_GROUP_DOC 
# tag is set to YES, then doxygen will reuse the documentation of the first 
# member in the group (if any) for the other members of the group. By default 
# all members of a group must be documented explicitly.

DISTRIBUTE_GROUP_DOC   = NO

# The TAB_SIZE tag can be used to set the number of spaces in a tab. 
# Doxygen uses this value to replace tabs by spaces in code fragments.

TAB_SIZE               = 8

# This tag can be used to specify a number of aliases that acts 
# as commands in the documentation. An alias has the form "name=value". 
# For example adding "sideeffect=\par Side Effects:\n" will allow you to 
# put the command \sideeffect (or @sideeffect) in the documentation, which 
# will result in a user-defined paragraph with heading "Side Effects:". 
# You can put \n's in the value part of an alias to insert newlines.

ALIASES                = 

# Set the OPTIMIZE_OUTPUT_FOR_C tag to YES if your project consists of C sources 
# only. Doxygen will then generate output that is more tailored for C. 
# For instance, some of the names that are used will be different. The list 
# of all members will be omitted, etc.

OPTIMIZE_OUTPUT_FOR_C  = YES

# Set the OPTIMIZE_OUTPUT_JAVA tag to YES if your project consists of Java sources 
# only. Doxygen will then generate output that is more tailored for Java. 
# For instance, namespaces will be presented as packages, qualified scopes 
# will look different, etc.

OPTIMIZE_OUTPUT_JAVA   = NO

# Set the SUBGROUPING tag to YES (the default) to allow class member groups of 
# the same type (for instance a group of public functions) to be put as a 
# subgroup of that type (e.g. under the Public Functions section). Set it to 
# NO to prevent subgrouping. Alternatively, this can be done per class using 
# the \nosubgrouping command.

SUBGROUPING            = YES

#---------------------------------------------------------------------------
# Build related configuration options
#---------------------------------------------------------------------------

# If the EXTRACT_ALL tag is set to YES doxygen will assume all entities in 
# documentation are documented, even if no documentation was available. 
# Private class members and static file members will be hidden unless 
# the EXTRACT_PRIVATE and EXTRACT_STATIC tags are set to YES

EXTRACT_ALL            = NO

# If the EXTRACT_PRIVATE tag is set to YES all private members of a class 
# will be included in the documentation.

EXTRACT_PRIVATE        = YES

# If the EXTRACT_STATIC tag is set to YES all static members of a file 
# will be included in the documentation.

EXTRACT_STATIC         = YES

# If the EXTRACT_LOCAL_CLASSES tag is set to YES classes (and structs) 
# defined locally in source files will be included in the documentation. 
# If set to NO only classes defined in header files are included.

EXTRACT_LOCAL_CLASSES  = YES

# This flag is only useful for Objective-C code. When set to YES local 
# methods, which are defined in the implementation section but not in 
# the interface are included in the documentation. 
# If set to NO (the default) only methods in the interface are included.

EXTRACT_LOCAL_METHODS  = NO

# If the HIDE_UNDOC_MEMBERS tag is set to YES, Doxygen will hide all 
# undocumented members of documented classes, files or namespaces. 
# If set to NO (the default) these members will be included in the 
# various overviews, but no documentation section is generated. 
# This option has no effect if EXTRACT_ALL is enabled.

HIDE_UNDOC_MEMBERS     = NO

# If the HIDE_UNDOC_CLASSES tag is set to YES, Doxygen will hide all 
# undocumented classes that are normally visible in the class hierarchy. 
# If set to NO (the default) these classes will be included in the various 
# overviews. This option has no effect if EXTRACT_ALL is enabled.

HIDE_UNDOC_CLASSES     = NO

# If the HIDE_FRIEND_COMPOUNDS tag is set to YES, Doxygen will hide all 
# friend (class|struct|union) declarations. 
# If set to NO (the default) these declarations will be included in the 
# documentation.

HIDE_FRIEND_COMPOUNDS  = NO

# If the HIDE_IN_BODY_DOCS tag is set to YES, Doxygen will hide any 
# documentation blocks found inside the body of a function. 
# If set to NO (the default) these blocks will be appended to the 
# function's detailed documentation block.

HIDE_IN_BODY_DOCS      = NO

# The INTERNAL_DOCS tag determines if documentation 
# that is typed after a \internal command is included. If the tag is set 
# to NO (the default) then the documentation will be excluded. 
# Set it to YES to include the internal documentation.

INTERNAL_DOCS          = NO

# If the CASE_SENSE_NAMES tag is set to NO then Doxygen will only generate 
# file names in lower-case letters. If set to YES upper-case letters are also 
# allowed. This is useful if you have classes or files whose names only differ 
# in case and if your file system supports case sensitive file names. Windows 
# and Mac users are advised to set this option to NO.

CASE_SENSE_NAMES       = YES

# If the HIDE_SCOPE_NAMES tag is set to NO (the default) then Doxygen 
# will show members with their full class and namespace scopes in the 
# documentation. If set to YES the scope will be hidden.

HIDE_SCOPE_NAMES       = NO

# If the SHOW_INCLUDE_FILES tag is set to YES (the default) then Doxygen 
# will put a list of the files that are included by a file in the documentation 
# of that file.

SHOW_INCLUDE_FILES     = NO

# If the INLINE_INFO tag is set to YES (the default) then a tag [inline] 
# is inserted in the documentation for inline members.

INLINE_INFO            = YES

# If the SORT_MEMBER_DOCS tag is set to YES (the default) then doxygen 
# will sort the (detailed) documentation of file and class members 
# alphabetically by member name. If set to NO the members will appear in 
# declaration order.

SORT_MEMBER_DOCS       = NO

# If the SORT_BRIEF_DOCS tag is set to YES then doxygen will sort the 
# brief documentation of file, namespace and class members alphabetically 
# by member name. If set to NO (the default) the members will appear in 
# declaration order.

SORT_BRIEF_DOCS        = NO

# If the SORT_BY_SCOPE_NAME tag is set to YES, the class list will be 
# sorted by fully-qualified names, including namespaces. If set to 
# NO (the default), the class list will be sorted only by class name, 
# not including the namespace part. 
# Note: This option is not very useful if HIDE_SCOPE_NAMES is set to YES.
# Note: This option applies only to the class list, not to the 
# alphabetical list.

SORT_BY_SCOPE_NAME     = NO

# The GENERATE_TODOLIST tag can be used to enable (YES) or 
# disable (NO) the todo list. This list is created by putting \todo 
# commands in the documentation.

GENERATE_TODOLIST      = YES

# The GENERATE_TESTLIST tag can be used to enable (YES) or 
# disable (NO) the test list. This list is created by putting \test 
# commands in the documentation.

GENERATE_TESTLIST      = YES

# The GENERATE_BUGLIST tag can be used to enable (YES) or 
# disable (NO) the bug list. This list is created by putting \bug 
# commands in the documentation.

GENERATE_BUGLIST       = YES

# The GENERATE_DEPRECATEDLIST tag can be used to enable (YES) or 
# disable (NO) the deprecated list. This list is created by putting 
# \deprecated commands in the documentation.

GENERATE_DEPRECATEDLIST= YES

# The ENABLED_SECTIONS tag can be used to enable conditional 
# documentation sections, marked by \if sectionname ... \endif.

ENABLED_SECTIONS       = 

# The MAX_INITIALIZER_LINES tag determines the maximum number of lines 
# the initial value of a variable or define consists of for it to appear in 
# the documentation. If the initializer consists of more lines than specified 
# here it will be hidden. Use a value of 0 to hide initializers completely. 
# The appearance of the initializer of individual variables and defines in the 
# documentation can be controlled using \showinitializer or \hideinitializer 
# command in the documentation regardless of this setting.

MAX_INITIALIZER_LINES  = 30

# Set the SHOW_USED_FILES tag to NO to disable the list of files generated 
# at the bottom of the documentation of classes and structs. If set to YES the 
# list will mention the files that were used to generate the documentation.

SHOW_USED_FILES        = YES

#---------------------------------------------------------------------------
# configuration options related to warning and progress messages
#---------------------------------------------------------------------------

# The QUIET tag can be used to turn on/off the messages that are generated 
# by doxygen. Possible values are YES and NO. If left blank NO is used.

QUIET                  = YES

# The WARNINGS tag can be used to turn on/off the warning messages that are 
# generated by doxygen. Possible values are YES and NO. If left blank 
# NO is used.

WARNINGS               = YES

# If WARN_IF_UNDOCUMENTED is set to YES, then doxygen will generate warnings 
# for undocumented members. If EXTRACT_ALL is set to YES then this flag will 
# automatically be disabled.

WARN_IF_UNDOCUMENTED   = NO

# If WARN_IF_DOC_ERROR is set to YES, doxygen will generate warnings for 
# potential errors in the documentation, such as not documenting some 
# parameters in a documented function, or documenting parameters that 
# don't exist or using markup commands wrongly.

WARN_IF_DOC_ERROR      = YES

# The WARN_FORMAT tag determines the format of the warning messages that 
# doxygen can produce. The string should contain the $file, $line, and $text 
# tags, which will be replaced by the file and line number from which the 
# warning originated and the warning text.

WARN_FORMAT            = "$file:$line: $text"

# The WARN_LOGFILE tag can be used to specify a file to which warning 
# and error messages should be written. If left blank the output is written 
# to stderr.

WARN_LOGFILE           = 

#---------------------------------------------------------------------------
# configuration options related to the input files
#---------------------------------------------------------------------------

# The INPUT tag can be used to specify the files and/or directories that contain 
# documented source files. You may enter file names like "myfile.cpp" or 
# directories like "/usr/src/myproject". Separate the files or directories 
# with spaces.

INPUT                  = . \
                         ../shared-core

# If the value of the INPUT tag contains directories, you can use the 
# FILE_PATTERNS tag to specify one or more wildcard pattern (like *.cpp 
# and *.h) to filter out the source-files in the directories. If left 
# blank the following patterns are tested: 
# *.c *.cc *.cxx *.cpp *.c++ *.java *.ii *.ixx *.ipp *.i++ *.inl *.h *.hh *.hxx *.hpp 
# *.h++ *.idl *.odl *.cs *.php *.php3 *.inc *.m *.mm

FILE_PATTERNS          = *.c \
                         *.h

# The RECURSIVE tag can be used to turn specify whether or not subdirectories 
# should be searched for input files as well. Possible values are YES and NO. 
# If left blank NO is used.

RECURSIVE              = NO

# The EXCLUDE tag can be used to specify files and/or directories that should 
# excluded from the INPUT source files. This way you can easily exclude a 
# subdirectory from a directory tree whose root is specified with the INPUT tag.

EXCLUDE                = 

# The EXCLUDE_SYMLINKS tag can be used select whether or not files or directories 
# that are symbolic links (a Unix filesystem feature) are excluded from the input.

EXCLUDE_SYMLINKS       = YES

# If the value of the INPUT tag contains directories, you can use the 
# EXCLUDE_PATTERNS tag to specify one or more wildcard patterns to exclude 
# certain files from those directories.

EXCLUDE_PATTERNS       = 

# The EXAMPLE_PATH tag can be used to specify one or more files or 
# directories that contain example code fragments that are included (see 
# the \include command).

EXAMPLE_PATH           = 

# If the value of the EXAMPLE_PATH tag contains directories, you can use the 
# EXAMPLE_PATTERNS tag to specify one or more wildcard pattern (like *.cpp 
# and *.h) to filter out the source-files in the directories. If left 
# blank all files are included.

EXAMPLE_PATTERNS       = 

# If the EXAMPLE_RECURSIVE tag is set to YES then subdirectories will be 
# searched for input files to be used with the \include or \dontinclude 
# commands irrespective of the value of the RECURSIVE tag. 
# Possible values are YES and NO. If left blank NO is used.

EXAMPLE_RECURSIVE      = NO

# The IMAGE_PATH tag can be used to specify one or more files or 
# directories that contain image that are included in the documentation (see 
# the \image command).

IMAGE_PATH             = 

# The INPUT_FILTER tag can be used to specify a program that doxygen should 
# invoke to filter for each input file. Doxygen will invoke the filter program 
# by executing (via popen()) the command <filter> <input-file>, where <filter> 
# is the value of the INPUT_FILTER tag, and <input-file> is the name of an 
# input file. Doxygen will then use the output that the filter program writes 
# to standard output.  If FILTER_PATTERNS is specified, this tag will be 
# ignored.

INPUT_FILTER           = 

# The FILTER_PATTERNS tag can be used to specify filters on a per file pattern 
# basis.  Doxygen will compare the file name with each pattern and apply the 
# filter if there is a match.  The filters are a list of the form: 
# pattern=filter (like *.cpp=my_cpp_filter). See INPUT_FILTER for further 
# info on how filters are used. If FILTER_PATTERNS is empty, INPUT_FILTER 
# is applied to all files.

FILTER_PATTERNS        = 

# If the FILTER_SOURCE_FILES tag is set to YES, the input filter (if set using 
# INPUT_FILTER) will be used to filter the input files when producing source 
# files to browse (i.e. when SOURCE_BROWSER is set to YES).

FILTER_SOURCE_FILES    = NO

#---------------------------------------------------------------------------
# configuration options related to source browsing
#---------------------------------------------------------------------------

# If the SOURCE_BROWSER tag is set to YES then a list of source files will 
# be generated. Documented entities will be cross-referenced with these sources. 
# Note: To get rid of all source code in the generated output, make sure also 
# VERBATIM_HEADERS is set to NO.

SOURCE_BROWSER         = NO

# Setting the INLINE_SOURCES tag to YES will include the body 
# of functions and classes directly in the documentation.

INLINE_SOURCES         = NO

# Setting the STRIP_CODE_COMMENTS tag to YES (the default) will instruct 
# doxygen to hide any special comment blocks from generated source code 
# fragments. Normal C and C++ comments will always remain visible.

STRIP_CODE_COMMENTS    = YES

# If the REFERENCED_BY_RELATION tag is set to YES (the default) 
# then for each documented function all documented 
# functions referencing it will be listed.

REFERENCED_BY_RELATION = YES

# If the REFERENCES_RELATION tag is set to YES (the default) 
# then for each documented function all documented entities 
# called/used by that function will be listed.

REFERENCES_RELATION    = YES

# If the VERBATIM_HEADERS tag is set to YES (the default) then Doxygen 
# will generate a verbatim copy of the header file for each class for 
# which an include is specified. Set to NO to disable this.

VERBATIM_HEADERS       = NO

#---------------------------------------------------------------------------
# configuration options related to the alphabetical class index
#---------------------------------------------------------------------------

# If the ALPHABETICAL_INDEX tag is set to YES, an alphabetical index 
# of all compounds will be generated. Enable this if the project 
# contains a lot of classes, structs, unions or interfaces.

ALPHABETICAL_INDEX     = NO

# If the alphabetical index is enabled (see ALPHABETICAL_INDEX) then 
# the COLS_IN_ALPHA_INDEX tag can be used to specify the number of columns 
# in which this list will be split (can be a number in the range [1..20])

COLS_IN_ALPHA_INDEX    = 5

# In case all classes in a project start with a common prefix, all 
# classes will be put under the same header in the alphabetical index. 
# The IGNORE_PREFIX tag can be used to specify one or more prefixes that 
# should be ignored while generating the index headers.

IGNORE_PREFIX          = 

#---------------------------------------------------------------------------
# configuration options related to the HTML output
#---------------------------------------------------------------------------

# If the GENERATE_HTML tag is set to YES (the default) Doxygen will 
# generate HTML output.

GENERATE_HTML          = YES

# The HTML_OUTPUT tag is used to specify where the HTML docs will be put. 
# If a relative path is entered the value of OUTPUT_DIRECTORY will be 
# put in front of it. If left blank `html' will be used as the default path.

HTML_OUTPUT            = html

# The HTML_FILE_EXTENSION tag can be used to specify the file extension for 
# each generated HTML page (for example: .htm,.php,.asp). If it is left blank 
# doxygen will generate files with .html extension.

HTML_FILE_EXTENSION    = .html

# The HTML_HEADER tag can be used to specify a personal HTML header for 
# each generated HTML page. If it is left blank doxygen will generate a 
# standard header.

HTML_HEADER            = 

# The HTML_FOOTER tag can be used to specify a personal HTML footer for 
# each generated HTML page. If it is left blank doxygen will generate a 
# standard footer.

HTML_FOOTER            = 

# The HTML_STYLESHEET tag can be used to specify a user-defined cascading 
# style sheet that is used by each HTML page. It can be used to 
# fine-tune the look of the HTML output. If the tag is left blank doxygen 
# will generate a default style sheet. Note that doxygen will try to copy 
# the style sheet file to the HTML output directory, so don't put your own 
# stylesheet in the HTML output directory as well, or it will be erased!

HTML_STYLESHEET        = 

# If the HTML_ALIGN_MEMBERS tag is set to YES, the members of classes, 
# files or namespaces will be aligned in HTML using tables. If set to 
# NO a bullet list will be used.

HTML_ALIGN_MEMBERS     = YES

# If the GENERATE_HTMLHELP tag is set to YES, additional index files 
# will be generated that can be used as input for tools like the 
# Microsoft HTML help workshop to generate a compressed HTML help file (.chm) 
# of the generated HTML documentation.

GENERATE_HTMLHELP      = NO

# If the GENERATE_HTMLHELP tag is set to YES, the CHM_FILE tag can 
# be used to specify the file name of the resulting .chm file. You 
# can add a path in front of the file if the result should not be 
# written to the html output directory.

CHM_FILE               = 

# If the GENERATE_HTMLHELP tag is set to YES, the HHC_LOCATION tag can 
# be used to specify the location (absolute path including file name) of 
# the HTML help compiler (hhc.exe). If non-empty doxygen will try to run 
# the HTML help compiler on the generated index.hhp.

HHC_LOCATION           = 

# If the GENERATE_HTMLHELP tag is set to YES, the GENERATE_CHI flag 
# controls if a separate .chi index file is generated (YES) or that 
# it should be included in the master .chm file (NO).

GENERATE_CHI           = NO

# If the GENERATE_HTMLHELP tag is set to YES, the BINARY_TOC flag 
# controls whether a binary table of contents is generated (YES) or a 
# normal table of contents (NO) in the .chm file.

BINARY_TOC             = NO

# The TOC_EXPAND flag can be set to YES to add extra items for group members 
# to the contents of the HTML help documentation and to the tree view.

TOC_EXPAND             = NO

# The DISABLE_INDEX tag can be used to turn on/off the condensed index at 
# top of each HTML page. The value NO (the default) enables the index and 
# the value YES disables it.

DISABLE_INDEX          = NO

# This tag can be used to set the number of enum values (range [1..20]) 
# that doxygen will group on one line in the generated HTML documentation.

ENUM_VALUES_PER_LINE   = 4

# If the GENERATE_TREEVIEW tag is set to YES, a side panel will be
# generated containing a tree-like index structure (just like the one that 
# is generated for HTML Help). For this to work a browser that supports 
# JavaScript, DHTML, CSS and frames is required (for instance Mozilla 1.0+, 
# Netscape 6.0+, Internet explorer 5.0+, or Konqueror). Windows users are 
# probably better off using the HTML help feature.

GENERATE_TREEVIEW      = NO

# If the treeview is enabled (see GENERATE_TREEVIEW) then this tag can be 
# used to set the initial width (in pixels) of the frame in which the tree 
# is shown.

TREEVIEW_WIDTH         = 250

#---------------------------------------------------------------------------
# configuration options related to the LaTeX output
#---------------------------------------------------------------------------

# If the GENERATE_LATEX tag is set to YES (the default) Doxygen will 
# generate Latex output.

GENERATE_LATEX         = NO

# The LATEX_OUTPUT tag is used to specify where the LaTeX docs will be put. 
# If a relative path is entered the value of OUTPUT_DIRECTORY will be 
# put in front of it. If left blank `latex' will be used as the default path.

LATEX_OUTPUT           = latex

# The LATEX_CMD_NAME tag can be used to specify the LaTeX command name to be 
# invoked. If left blank `latex' will be used as the default command name.

LATEX_CMD_NAME         = latex

# The MAKEINDEX_CMD_NAME tag can be used to specify the command name to 
# generate index for LaTeX. If left blank `makeindex' will be used as the 
# default command name.

MAKEINDEX_CMD_NAME     = makeindex

# If the COMPACT_LATEX tag is set to YES Doxygen generates more compact 
# LaTeX documents. This may be useful for small projects and may help to 
# save some trees in general.

COMPACT_LATEX          = NO

# The PAPER_TYPE tag can be used to set the paper type that is used 
# by the printer. Possible values are: a4, a4wide, letter, legal and 
# executive. If left blank a4wide will be used.

PAPER_TYPE             = a4wide

# The EXTRA_PACKAGES tag can be to specify one or more names of LaTeX 
# packages that should be included in the LaTeX output.

EXTRA_PACKAGES         = 

# The LATEX_HEADER tag can be used to specify a personal LaTeX header for 
# the generated latex document. The header should contain everything until 
# the first chapter. If it is left blank doxygen will generate a 
# standard header. Notice: only use this tag if you know what you are doing!

LATEX_HEADER           = 

# If the PDF_HYPERLINKS tag is set to YES, the LaTeX that is generated 
# is prepared for conversion to pdf (using ps2pdf). The pdf file will 
# contain links (just like the HTML output) instead of page references 
# This makes the output suitable for online browsing using a pdf viewer.

PDF_HYPERLINKS         = NO

# If the USE_PDFLATEX tag is set to YES, pdflatex will be used instead of 
# plain latex in the generated Makefile. Set this option to YES to get a 
# higher quality PDF documentation.

USE_PDFLATEX           = NO

# If the LATEX_BATCHMODE tag is set to YES, doxygen will add the \\batchmode. 
# command to the generated LaTeX files. This will instruct LaTeX to keep 
# running if errors occur, instead of asking the user for help. 
# This option is also used when generating formulas in HTML.

LATEX_BATCHMODE        = NO

# If LATEX_HIDE_INDICES is set to YES then doxygen will not 
# include the index chapters (such as File Index, Compound Index, etc.) 
# in the output.

LATEX_HIDE_INDICES     = NO

#---------------------------------------------------------------------------
# configuration options related to the RTF output
#---------------------------------------------------------------------------

# If the GENERATE_RTF tag is set to YES Doxygen will generate RTF output 
# The RTF output is optimized for Word 97 and may not look very pretty with 
# other RTF readers or editors.

GENERATE_RTF           = NO

# The RTF_OUTPUT tag is used to specify where the RTF docs will be put. 
# If a relative path is entered the value of OUTPUT_DIRECTORY will be 
# put in front of it. If left blank `rtf' will be used as the default path.

RTF_OUTPUT             = rtf

# If the COMPACT_RTF tag is set to YES Doxygen generates more compact 
# RTF documents. This may be useful for small projects and may help to 
# save some trees in general.

COMPACT_RTF            = NO

# If the RTF_HYPERLINKS tag is set to YES, the RTF that is generated 
# will contain hyperlink fields. The RTF file will 
# contain links (just like the HTML output) instead of page references. 
# This makes the output suitable for online browsing using WORD or other 
# programs which support those fields. 
# Note: wordpad (write) and others do not support links.

RTF_HYPERLINKS         = NO

# Load stylesheet definitions from file. Syntax is similar to doxygen's 
# config file, i.e. a series of assignments. You only have to provide 
# replacements, missing definitions are set to their default value.

RTF_STYLESHEET_FILE    = 

# Set optional variables used in the generation of an rtf document. 
# Syntax is similar to doxygen's config file.

RTF_EXTENSIONS_FILE    = 

#---------------------------------------------------------------------------
# configuration options related to the man page output
#---------------------------------------------------------------------------

# If the GENERATE_MAN tag is set to YES (the default) Doxygen will 
# generate man pages

GENERATE_MAN           = NO

# The MAN_OUTPUT tag is used to specify where the man pages will be put. 
# If a relative path is entered the value of OUTPUT_DIRECTORY will be 
# put in front of it. If left blank `man' will be used as the default path.

MAN_OUTPUT             = man

# The MAN_EXTENSION tag determines the extension that is added to 
# the generated man pages (default is the subroutine's section .3)

MAN_EXTENSION          = .3

# If the MAN_LINKS tag is set to YES and Doxygen generates man output, 
# then it will generate one additional man file for each entity 
# documented in the real man page(s). These additional files 
# only source the real man page, but without them the man command 
# would be unable to find the correct page. The default is NO.

MAN_LINKS              = NO

#---------------------------------------------------------------------------
# configuration options related to the XML output
#---------------------------------------------------------------------------

# If the GENERATE_XML tag is set to YES Doxygen will 
# generate an XML file that captures the structure of 
# the code including all documentation.

GENERATE_XML           = NO

# The XML_OUTPUT tag is used to specify where the XML pages will be put. 
# If a relative path is entered the value of OUTPUT_DIRECTORY will be 
# put in front of it. If left blank `xml' will be used as the default path.

XML_OUTPUT             = xml

# The XML_SCHEMA tag can be used to specify an XML schema, 
# which can be used by a validating XML parser to check the 
# syntax of the XML files.

XML_SCHEMA             = 

# The XML_DTD tag can be used to specify an XML DTD, 
# which can be used by a validating XML parser to check the 
# syntax of the XML files.

XML_DTD                = 

# If the XML_PROGRAMLISTING tag is set to YES Doxygen will 
# dump the program listings (including syntax highlighting 
# and cross-referencing information) to the XML output. Note that 
# enabling this will significantly increase the size of the XML output.

XML_PROGRAMLISTING     = YES

#---------------------------------------------------------------------------
# configuration options for the AutoGen Definitions output
#---------------------------------------------------------------------------

# If the GENERATE_AUTOGEN_DEF tag is set to YES Doxygen will 
# generate an AutoGen Definitions (see autogen.sf.net) file 
# that captures the structure of the code including all 
# documentation. Note that this feature is still experimental 
# and incomplete at the moment.

GENERATE_AUTOGEN_DEF   = NO

#---------------------------------------------------------------------------
# configuration options related to the Perl module output
#---------------------------------------------------------------------------

# If the GENERATE_PERLMOD tag is set to YES Doxygen will 
# generate a Perl module file that captures the structure of 
# the code including all documentation. Note that this 
# feature is still experimental and incomplete at the 
# moment.

GENERATE_PERLMOD       = NO

# If the PERLMOD_LATEX tag is set to YES Doxygen will generate 
# the necessary Makefile rules, Perl scripts and LaTeX code to be able 
# to generate PDF and DVI output from the Perl module output.

PERLMOD_LATEX          = NO

# If the PERLMOD_PRETTY tag is set to YES the Perl module output will be 
# nicely formatted so it can be parsed by a human reader.  This is useful 
# if you want to understand what is going on.  On the other hand, if this 
# tag is set to NO the size of the Perl module output will be much smaller 
# and Perl will parse it just the same.

PERLMOD_PRETTY         = YES

# The names of the make variables in the generated doxyrules.make file 
# are prefixed with the string contained in PERLMOD_MAKEVAR_PREFIX. 
# This is useful so different doxyrules.make files included by the same 
# Makefile don't overwrite each other's variables.

PERLMOD_MAKEVAR_PREFIX = 

#---------------------------------------------------------------------------
# Configuration options related to the preprocessor   
#---------------------------------------------------------------------------

# If the ENABLE_PREPROCESSING tag is set to YES (the default) Doxygen will 
# evaluate all C-preprocessor directives found in the sources and include 
# files.

ENABLE_PREPROCESSING   = YES

# If the MACRO_EXPANSION tag is set to YES Doxygen will expand all macro 
# names in the source code. If set to NO (the default) only conditional 
# compilation will be performed. Macro expansion can be done in a controlled 
# way by setting EXPAND_ONLY_PREDEF to YES.

MACRO_EXPANSION        = YES

# If the EXPAND_ONLY_PREDEF and MACRO_EXPANSION tags are both set to YES 
# then the macro expansion is limited to the macros specified with the 
# PREDEFINED and EXPAND_AS_PREDEFINED tags.

EXPAND_ONLY_PREDEF     = YES

# If the SEARCH_INCLUDES tag is set to YES (the default) the includes files 
# in the INCLUDE_PATH (see below) will be search if a #include is found.

SEARCH_INCLUDES        = YES

# The INCLUDE_PATH tag can be used to specify one or more directories that 
# contain include files that are not input files but should be processed by 
# the preprocessor.

INCLUDE_PATH           = 

# You can use the INCLUDE_FILE_PATTERNS tag to specify one or more wildcard 
# patterns (like *.h and *.hpp) to filter out the header-files in the 
# directories. If left blank, the patterns specified with FILE_PATTERNS will 
# be used.

INCLUDE_FILE_PATTERNS  = 

# The PREDEFINED tag can be used to specify one or more macro names that 
# are defined before the preprocessor is started (similar to the -D option of 
# gcc). The argument of the tag is a list of macros of the form: name 
# or name=definition (no spaces). If the definition and the = are 
# omitted =1 is assumed.

PREDEFINED             = __KERNEL__ \
                         DRM(x)=x \
                         __OS_HAS_AGP=1 \
                         __OS_HAS_MTRR=1

# If the MACRO_EXPANSION and EXPAND_ONLY_PREDEF tags are set to YES then 
# this tag can be used to specify a list of macro names that should be expanded. 
# The macro definition that is found in the sources will be used. 
# Use the PREDEFINED tag if you want to use a different macro definition.

EXPAND_AS_DEFINED      = DRMFILE \
                         DRM_IOCTL_ARGS \
                         DRM_IRQ_ARGS \
                         DRM_TASKQUEUE_ARGS

# If the SKIP_FUNCTION_MACROS tag is set to YES (the default) then 
# doxygen's preprocessor will remove all function-like macros that are alone 
# on a line, have an all uppercase name, and do not end with a semicolon. Such 
# function macros are typically used for boiler-plate code, and will confuse the 
# parser if not removed.

SKIP_FUNCTION_MACROS   = YES

#---------------------------------------------------------------------------
# Configuration::additions related to external references   
#---------------------------------------------------------------------------

# The TAGFILES option can be used to specify one or more tagfiles. 
# Optionally an initial location of the external documentation 
# can be added for each tagfile. The format of a tag file without 
# this location is as follows: 
#   TAGFILES = file1 file2 ... 
# Adding location for the tag files is done as follows: 
#   TAGFILES = file1=loc1 "file2 = loc2" ... 
# where "loc1" and "loc2" can be relative or absolute paths or 
# URLs. If a location is present for each tag, the installdox tool 
# does not have to be run to correct the links.
# Note that each tag file must have a unique name
# (where the name does NOT include the path)
# If a tag file is not located in the directory in which doxygen 
# is run, you must also specify the path to the tagfile here.

TAGFILES               = 

# When a file name is specified after GENERATE_TAGFILE, doxygen will create 
# a tag file that is based on the input files it reads.

GENERATE_TAGFILE       = 

# If the ALLEXTERNALS tag is set to YES all external classes will be listed 
# in the class index. If set to NO only the inherited external classes 
# will be listed.

ALLEXTERNALS           = NO

# If the EXTERNAL_GROUPS tag is set to YES all external groups will be listed 
# in the modules index. If set to NO, only the current project's groups will 
# be listed.

EXTERNAL_GROUPS        = YES

# The PERL_PATH should be the absolute path and name of the perl script 
# interpreter (i.e. the result of `which perl').

PERL_PATH              = /usr/bin/perl

#---------------------------------------------------------------------------
# Configuration options related to the dot tool   
#---------------------------------------------------------------------------

# If the CLASS_DIAGRAMS tag is set to YES (the default) Doxygen will 
# generate a inheritance diagram (in HTML, RTF and LaTeX) for classes with base or 
# super classes. Setting the tag to NO turns the diagrams off. Note that this 
# option is superseded by the HAVE_DOT option below. This is only a fallback. It is 
# recommended to install and use dot, since it yields more powerful graphs.

CLASS_DIAGRAMS         = YES

# If set to YES, the inheritance and collaboration graphs will hide 
# inheritance and usage relations if the target is undocumented 
# or is not a class.

HIDE_UNDOC_RELATIONS   = YES

# If you set the HAVE_DOT tag to YES then doxygen will assume the dot tool is 
# available from the path. This tool is part of Graphviz, a graph visualization 
# toolkit from AT&T and Lucent Bell Labs. The other options in this section 
# have no effect if this option is set to NO (the default)

HAVE_DOT               = NO

# If the CLASS_GRAPH and HAVE_DOT tags are set to YES then doxygen 
# will generate a graph for each documented class showing the direct and 
# indirect inheritance relations. Setting this tag to YES will force the 
# the CLASS_DIAGRAMS tag to NO.

CLASS_GRAPH            = YES

# If the COLLABORATION_GRAPH and HAVE_DOT tags are set to YES then doxygen 
# will generate a graph for each documented class showing the direct and 
# indirect implementation dependencies (inheritance, containment, and 
# class references variables) of the class with other documented classes.

COLLABORATION_GRAPH    = YES

# If the UML_LOOK tag is set to YES doxygen will generate inheritance and 
# collaboration diagrams in a style similar to the OMG's Unified Modeling 
# Language.

UML_LOOK               = NO

# If set to YES, the inheritance and collaboration graphs will show the 
# relations between templates and their instances.

TEMPLATE_RELATIONS     = YES

# If the ENABLE_PREPROCESSING, SEARCH_INCLUDES, INCLUDE_GRAPH, and HAVE_DOT 
# tags are set to YES then doxygen will generate a graph for each documented 
# file showing the direct and indirect include dependencies of the file with 
# other documented files.

INCLUDE_GRAPH          = YES

# If the ENABLE_PREPROCESSING, SEARCH_INCLUDES, INCLUDED_BY_GRAPH, and 
# HAVE_DOT tags are set to YES then doxygen will generate a graph for each 
# documented header file showing the documented files that directly or 
# indirectly include this file.

INCLUDED_BY_GRAPH      = YES

# If the CALL_GRAPH and HAVE_DOT tags are set to YES then doxygen will 
# generate a call dependency graph for every global function or class method. 
# Note that enabling this option will significantly increase the time of a run. 
# So in most cases it will be better to enable call graphs for selected 
# functions only using the \callgraph command.

CALL_GRAPH             = NO

# If the GRAPHICAL_HIERARCHY and HAVE_DOT tags are set to YES then doxygen 
# will graphical hierarchy of all classes instead of a textual one.

GRAPHICAL_HIERARCHY    = YES

# The DOT_IMAGE_FORMAT tag can be used to set the image format of the images 
# generated by dot. Possible values are png, jpg, or gif
# If left blank png will be used.

DOT_IMAGE_FORMAT       = png

# The tag DOT_PATH can be used to specify the path where the dot tool can be 
# found. If left blank, it is assumed the dot tool can be found on the path.

DOT_PATH               = 

# The DOTFILE_DIRS tag can be used to specify one or more directories that 
# contain dot files that are included in the documentation (see the 
# \dotfile command).

DOTFILE_DIRS           = 

# The MAX_DOT_GRAPH_WIDTH tag can be used to set the maximum allowed width 
# (in pixels) of the graphs generated by dot. If a graph becomes larger than 
# this value, doxygen will try to truncate the graph, so that it fits within 
# the specified constraint. Beware that most browsers cannot cope with very 
# large images.

MAX_DOT_GRAPH_WIDTH    = 1024

# The MAX_DOT_GRAPH_HEIGHT tag can be used to set the maximum allows height 
# (in pixels) of the graphs generated by dot. If a graph becomes larger than 
# this value, doxygen will try to truncate the graph, so that it fits within 
# the specified constraint. Beware that most browsers cannot cope with very 
# large images.

MAX_DOT_GRAPH_HEIGHT   = 1024

# The MAX_DOT_GRAPH_DEPTH tag can be used to set the maximum depth of the 
# graphs generated by dot. A depth value of 3 means that only nodes reachable 
# from the root by following a path via at most 3 edges will be shown. Nodes that 
# lay further from the root node will be omitted. Note that setting this option to 
# 1 or 2 may greatly reduce the computation time needed for large code bases. Also 
# note that a graph may be further truncated if the graph's image dimensions are 
# not sufficient to fit the graph (see MAX_DOT_GRAPH_WIDTH and MAX_DOT_GRAPH_HEIGHT). 
# If 0 is used for the depth value (the default), the graph is not depth-constrained.

MAX_DOT_GRAPH_DEPTH    = 0

# If the GENERATE_LEGEND tag is set to YES (the default) Doxygen will 
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/**************************************************************************
 *
 * Copyright (c) 2006-2007 Tungsten Graphics, Inc., Cedar Park, TX., USA
 * All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sub license, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
 * USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 **************************************************************************/
/*
 * Authors: Thomas Hellström <thomas-at-tungstengraphics-dot-com>
 */

#include "drmP.h"

/*
 * Locking may look a bit complicated but isn't really:
 *
 * The buffer usage atomic_t needs to be protected by dev->struct_mutex
 * when there is a chance that it can be zero before or after the operation.
 *
 * dev->struct_mutex also protects all lists and list heads,
 * Hash tables and hash heads.
 *
 * bo->mutex protects the buffer object itself excluding the usage field.
 * bo->mutex does also protect the buffer list heads, so to manipulate those,
 * we need both the bo->mutex and the dev->struct_mutex.
 *
 * Locking order is bo->mutex, dev->struct_mutex. Therefore list traversal
 * is a bit complicated. When dev->struct_mutex is released to grab bo->mutex,
 * the list traversal will, in general, need to be restarted.
 *
 */

static void drm_bo_destroy_locked(struct drm_buffer_object *bo);
static int drm_bo_setup_vm_locked(struct drm_buffer_object *bo);
static void drm_bo_takedown_vm_locked(struct drm_buffer_object *bo);
static void drm_bo_unmap_virtual(struct drm_buffer_object *bo);

static inline uint64_t drm_bo_type_flags(unsigned type)
{
	return (1ULL << (24 + type));
}

/*
 * bo locked. dev->struct_mutex locked.
 */

void drm_bo_add_to_pinned_lru(struct drm_buffer_object *bo)
{
	struct drm_mem_type_manager *man;

	DRM_ASSERT_LOCKED(&bo->dev->struct_mutex);
	DRM_ASSERT_LOCKED(&bo->mutex);

	man = &bo->dev->bm.man[bo->pinned_mem_type];
	list_add_tail(&bo->pinned_lru, &man->pinned);
}

void drm_bo_add_to_lru(struct drm_buffer_object *bo)
{
	struct drm_mem_type_manager *man;

	DRM_ASSERT_LOCKED(&bo->dev->struct_mutex);

	if (!(bo->mem.proposed_flags & (DRM_BO_FLAG_NO_MOVE | DRM_BO_FLAG_NO_EVICT))
	    || bo->mem.mem_type != bo->pinned_mem_type) {
		man = &bo->dev->bm.man[bo->mem.mem_type];
		list_add_tail(&bo->lru, &man->lru);
	} else {
		INIT_LIST_HEAD(&bo->lru);
	}
}

static int drm_bo_vm_pre_move(struct drm_buffer_object *bo, int old_is_pci)
{
#ifdef DRM_ODD_MM_COMPAT
	int ret;

	if (!bo->map_list.map)
		return 0;

	ret = drm_bo_lock_kmm(bo);
	if (ret)
		return ret;
	drm_bo_unmap_virtual(bo);
	if (old_is_pci)
		drm_bo_finish_unmap(bo);
#else
	if (!bo->map_list.map)
		return 0;

	drm_bo_unmap_virtual(bo);
#endif
	return 0;
}

static void drm_bo_vm_post_move(struct drm_buffer_object *bo)
{
#ifdef DRM_ODD_MM_COMPAT
	int ret;

	if (!bo->map_list.map)
		return;

	ret = drm_bo_remap_bound(bo);
	if (ret) {
		DRM_ERROR("Failed to remap a bound buffer object.\n"
			  "\tThis might cause a sigbus later.\n");
	}
	drm_bo_unlock_kmm(bo);
#endif
}

/*
 * Call bo->mutex locked.
 */

static int drm_bo_add_ttm(struct drm_buffer_object *bo)
{
	struct drm_device *dev = bo->dev;
	int ret = 0;
	uint32_t page_flags = 0;

	DRM_ASSERT_LOCKED(&bo->mutex);
	bo->ttm = NULL;

	if (bo->mem.proposed_flags & DRM_BO_FLAG_WRITE)
		page_flags |= DRM_TTM_PAGE_WRITE;

	switch (bo->type) {
	case drm_bo_type_device:
	case drm_bo_type_kernel:
		bo->ttm = drm_ttm_create(dev, bo->num_pages << PAGE_SHIFT, 
					 page_flags, dev->bm.dummy_read_page);
		if (!bo->ttm)
			ret = -ENOMEM;
		break;
	case drm_bo_type_user:
		bo->ttm = drm_ttm_create(dev, bo->num_pages << PAGE_SHIFT,
					 page_flags | DRM_TTM_PAGE_USER,
					 dev->bm.dummy_read_page);
		if (!bo->ttm)
			ret = -ENOMEM;

		ret = drm_ttm_set_user(bo->ttm, current,
				       bo->buffer_start,
				       bo->num_pages);
		if (ret)
			return ret;

		break;
	default:
		DRM_ERROR("Illegal buffer object type\n");
		ret = -EINVAL;
		break;
	}

	return ret;
}

static int drm_bo_handle_move_mem(struct drm_buffer_object *bo,
				  struct drm_bo_mem_reg *mem,
				  int evict, int no_wait)
{
	struct drm_device *dev = bo->dev;
	struct drm_buffer_manager *bm = &dev->bm;
	int old_is_pci = drm_mem_reg_is_pci(dev, &bo->mem);
	int new_is_pci = drm_mem_reg_is_pci(dev, mem);
	struct drm_mem_type_manager *old_man = &bm->man[bo->mem.mem_type];
	struct drm_mem_type_manager *new_man = &bm->man[mem->mem_type];
	int ret = 0;

	if (old_is_pci || new_is_pci ||
	    ((mem->flags ^ bo->mem.flags) & DRM_BO_FLAG_CACHED))
		ret = drm_bo_vm_pre_move(bo, old_is_pci);
	if (ret)
		return ret;

	/*
	 * Create and bind a ttm if required.
	 */

	if (!(new_man->flags & _DRM_FLAG_MEMTYPE_FIXED) && (bo->ttm == NULL)) {
		ret = drm_bo_add_ttm(bo);
		if (ret)
			goto out_err;

		if (mem->mem_type != DRM_BO_MEM_LOCAL) {
			ret = drm_ttm_bind(bo->ttm, mem);
			if (ret)
				goto out_err;
		}

		if (bo->mem.mem_type == DRM_BO_MEM_LOCAL) {
			
			struct drm_bo_mem_reg *old_mem = &bo->mem;
			uint64_t save_flags = old_mem->flags;
			uint64_t save_proposed_flags = old_mem->proposed_flags;
			
			*old_mem = *mem;
			mem->mm_node = NULL;
			old_mem->proposed_flags = save_proposed_flags;
			DRM_FLAG_MASKED(save_flags, mem->flags,
					DRM_BO_MASK_MEMTYPE);
			goto moved;
		}
		
	}

	if (!(old_man->flags & _DRM_FLAG_MEMTYPE_FIXED) &&
	    !(new_man->flags & _DRM_FLAG_MEMTYPE_FIXED))		
		ret = drm_bo_move_ttm(bo, evict, no_wait, mem);
	else if (dev->driver->bo_driver->move) 
		ret = dev->driver->bo_driver->move(bo, evict, no_wait, mem);
	else
		ret = drm_bo_move_memcpy(bo, evict, no_wait, mem);

	if (ret)
		goto out_err;

moved:
	if (old_is_pci || new_is_pci)
		drm_bo_vm_post_move(bo);

	if (bo->priv_flags & _DRM_BO_FLAG_EVICTED) {
		ret =
		    dev->driver->bo_driver->invalidate_caches(dev,
							      bo->mem.flags);
		if (ret)
			DRM_ERROR("Can not flush read caches\n");
	}

	DRM_FLAG_MASKED(bo->priv_flags,
			(evict) ? _DRM_BO_FLAG_EVICTED : 0,
			_DRM_BO_FLAG_EVICTED);

	if (bo->mem.mm_node)
		bo->offset = (bo->mem.mm_node->start << PAGE_SHIFT) +
			bm->man[bo->mem.mem_type].gpu_offset;


	return 0;

out_err:
	if (old_is_pci || new_is_pci)
		drm_bo_vm_post_move(bo);

	new_man = &bm->man[bo->mem.mem_type];
	if ((new_man->flags & _DRM_FLAG_MEMTYPE_FIXED) && bo->ttm) {
		drm_ttm_unbind(bo->ttm);
		drm_ttm_destroy(bo->ttm);
		bo->ttm = NULL;
	}

	return ret;
}

/*
 * Call bo->mutex locked.
 * Returns -EBUSY if the buffer is currently rendered to or from. 0 otherwise.
 */

static int drm_bo_busy(struct drm_buffer_object *bo, int check_unfenced)
{
	struct drm_fence_object *fence = bo->fence;

	if (check_unfenced && (bo->priv_flags & _DRM_BO_FLAG_UNFENCED))
		return -EBUSY;

	if (fence) {
		if (drm_fence_object_signaled(fence, bo->fence_type)) {
			drm_fence_usage_deref_unlocked(&bo->fence);
			return 0;
		}
		drm_fence_object_flush(fence, DRM_FENCE_TYPE_EXE);
		if (drm_fence_object_signaled(fence, bo->fence_type)) {
			drm_fence_usage_deref_unlocked(&bo->fence);
			return 0;
		}
		return -EBUSY;
	}
	return 0;
}

static int drm_bo_check_unfenced(struct drm_buffer_object *bo)
{
	int ret;

	mutex_lock(&bo->mutex);
	ret = (bo->priv_flags & _DRM_BO_FLAG_UNFENCED);
	mutex_unlock(&bo->mutex);
	return ret;
}


/*
 * Call bo->mutex locked.
 * Wait until the buffer is idle.
 */

int drm_bo_wait(struct drm_buffer_object *bo, int lazy, int interruptible,
		int no_wait, int check_unfenced)
{
	int ret;

	DRM_ASSERT_LOCKED(&bo->mutex);
	while(unlikely(drm_bo_busy(bo, check_unfenced))) {
		if (no_wait)
			return -EBUSY;

		if (check_unfenced &&  (bo->priv_flags & _DRM_BO_FLAG_UNFENCED)) {
			mutex_unlock(&bo->mutex);
			wait_event(bo->event_queue, !drm_bo_check_unfenced(bo));
			mutex_lock(&bo->mutex);
			bo->priv_flags |= _DRM_BO_FLAG_UNLOCKED;
		}

		if (bo->fence) {
			struct drm_fence_object *fence;
			uint32_t fence_type = bo->fence_type;

			drm_fence_reference_unlocked(&fence, bo->fence);
			mutex_unlock(&bo->mutex);

			ret = drm_fence_object_wait(fence, lazy, !interruptible,
						    fence_type);

			drm_fence_usage_deref_unlocked(&fence);
			mutex_lock(&bo->mutex);
			bo->priv_flags |= _DRM_BO_FLAG_UNLOCKED;
			if (ret)
				return ret;
		}

	}
	return 0;
}
EXPORT_SYMBOL(drm_bo_wait);

static int drm_bo_expire_fence(struct drm_buffer_object *bo, int allow_errors)
{
	struct drm_device *dev = bo->dev;
	struct drm_buffer_manager *bm = &dev->bm;

	if (bo->fence) {
		if (bm->nice_mode) {
			unsigned long _end = jiffies + 3 * DRM_HZ;
			int ret;
			do {
				ret = drm_bo_wait(bo, 0, 0, 0, 0);
				if (ret && allow_errors)
					return ret;

			} while (ret && !time_after_eq(jiffies, _end));

			if (bo->fence) {
				bm->nice_mode = 0;
				DRM_ERROR("Detected GPU lockup or "
					  "fence driver was taken down. "
					  "Evicting buffer.\n");
			}
		}
		if (bo->fence)
			drm_fence_usage_deref_unlocked(&bo->fence);
	}
	return 0;
}

/*
 * Call dev->struct_mutex locked.
 * Attempts to remove all private references to a buffer by expiring its
 * fence object and removing from lru lists and memory managers.
 */

static void drm_bo_cleanup_refs(struct drm_buffer_object *bo, int remove_all)
{
	struct drm_device *dev = bo->dev;
	struct drm_buffer_manager *bm = &dev->bm;

	DRM_ASSERT_LOCKED(&dev->struct_mutex);

	atomic_inc(&bo->usage);
	mutex_unlock(&dev->struct_mutex);
	mutex_lock(&bo->mutex);

	DRM_FLAG_MASKED(bo->priv_flags, 0, _DRM_BO_FLAG_UNFENCED);

	if (bo->fence && drm_fence_object_signaled(bo->fence,
						   bo->fence_type))
		drm_fence_usage_deref_unlocked(&bo->fence);

	if (bo->fence && remove_all)
		(void)drm_bo_expire_fence(bo, 0);

	mutex_lock(&dev->struct_mutex);

	if (!atomic_dec_and_test(&bo->usage))
		goto out;

	if (!bo->fence) {
		list_del_init(&bo->lru);
		if (bo->mem.mm_node) {
			drm_mm_put_block(bo->mem.mm_node);
			if (bo->pinned_node == bo->mem.mm_node)
				bo->pinned_node = NULL;
			bo->mem.mm_node = NULL;
		}
		list_del_init(&bo->pinned_lru);
		if (bo->pinned_node) {
			drm_mm_put_block(bo->pinned_node);
			bo->pinned_node = NULL;
		}
		list_del_init(&bo->ddestroy);
		mutex_unlock(&bo->mutex);
		drm_bo_destroy_locked(bo);
		return;
	}

	if (list_empty(&bo->ddestroy)) {
		drm_fence_object_flush(bo->fence, bo->fence_type);
		list_add_tail(&bo->ddestroy, &bm->ddestroy);
		schedule_delayed_work(&bm->wq,
				      ((DRM_HZ / 100) < 1) ? 1 : DRM_HZ / 100);
	}

out:
	mutex_unlock(&bo->mutex);
	return;
}

/*
 * Verify that refcount is 0 and that there are no internal references
 * to the buffer object. Then destroy it.
 */

static void drm_bo_destroy_locked(struct drm_buffer_object *bo)
{
	struct drm_device *dev = bo->dev;
	struct drm_buffer_manager *bm = &dev->bm;

	DRM_ASSERT_LOCKED(&dev->struct_mutex);

	if (list_empty(&bo->lru) && bo->mem.mm_node == NULL &&
	    list_empty(&bo->pinned_lru) && bo->pinned_node == NULL &&
	    list_empty(&bo->ddestroy) && atomic_read(&bo->usage) == 0) {
		if (bo->fence != NULL) {
			DRM_ERROR("Fence was non-zero.\n");
			drm_bo_cleanup_refs(bo, 0);
			return;
		}

#ifdef DRM_ODD_MM_COMPAT
		BUG_ON(!list_empty(&bo->vma_list));
		BUG_ON(!list_empty(&bo->p_mm_list));
#endif

		if (bo->ttm) {
			drm_ttm_unbind(bo->ttm);
			drm_ttm_destroy(bo->ttm);
			bo->ttm = NULL;
		}

		atomic_dec(&bm->count);

		drm_ctl_free(bo, sizeof(*bo), DRM_MEM_BUFOBJ);

		return;
	}

	/*
	 * Some stuff is still trying to reference the buffer object.
	 * Get rid of those references.
	 */

	drm_bo_cleanup_refs(bo, 0);

	return;
}

/*
 * Call dev->struct_mutex locked.
 */

static void drm_bo_delayed_delete(struct drm_device *dev, int remove_all)
{
	struct drm_buffer_manager *bm = &dev->bm;

	struct drm_buffer_object *entry, *nentry;
	struct list_head *list, *next;

	list_for_each_safe(list, next, &bm->ddestroy) {
		entry = list_entry(list, struct drm_buffer_object, ddestroy);

		nentry = NULL;
		if (next != &bm->ddestroy) {
			nentry = list_entry(next, struct drm_buffer_object,
					    ddestroy);
			atomic_inc(&nentry->usage);
		}

		drm_bo_cleanup_refs(entry, remove_all);

		if (nentry)
			atomic_dec(&nentry->usage);
	}
}

#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20)
static void drm_bo_delayed_workqueue(void *data)
#else
static void drm_bo_delayed_workqueue(struct work_struct *work)
#endif
{
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20)
	struct drm_device *dev = (struct drm_device *) data;
	struct drm_buffer_manager *bm = &dev->bm;
#else
	struct drm_buffer_manager *bm =
	    container_of(work, struct drm_buffer_manager, wq.work);
	struct drm_device *dev = container_of(bm, struct drm_device, bm);
#endif

	DRM_DEBUG("Delayed delete Worker\n");

	mutex_lock(&dev->struct_mutex);
	if (!bm->initialized) {
		mutex_unlock(&dev->struct_mutex);
		return;
	}
	drm_bo_delayed_delete(dev, 0);
	if (bm->initialized && !list_empty(&bm->ddestroy)) {
		schedule_delayed_work(&bm->wq,
				      ((DRM_HZ / 100) < 1) ? 1 : DRM_HZ / 100);
	}
	mutex_unlock(&dev->struct_mutex);
}

void drm_bo_usage_deref_locked(struct drm_buffer_object **bo)
{
	struct drm_buffer_object *tmp_bo = *bo;
	bo = NULL;

	DRM_ASSERT_LOCKED(&tmp_bo->dev->struct_mutex);

	if (atomic_dec_and_test(&tmp_bo->usage))
		drm_bo_destroy_locked(tmp_bo);
}
EXPORT_SYMBOL(drm_bo_usage_deref_locked);

static void drm_bo_base_deref_locked(struct drm_file *file_priv,
				     struct drm_user_object *uo)
{
	struct drm_buffer_object *bo =
	    drm_user_object_entry(uo, struct drm_buffer_object, base);

	DRM_ASSERT_LOCKED(&bo->dev->struct_mutex);

	drm_bo_takedown_vm_locked(bo);
	drm_bo_usage_deref_locked(&bo);
}

void drm_bo_usage_deref_unlocked(struct drm_buffer_object **bo)
{
	struct drm_buffer_object *tmp_bo = *bo;
	struct drm_device *dev = tmp_bo->dev;

	*bo = NULL;
	if (atomic_dec_and_test(&tmp_bo->usage)) {
		mutex_lock(&dev->struct_mutex);
		if (atomic_read(&tmp_bo->usage) == 0)
			drm_bo_destroy_locked(tmp_bo);
		mutex_unlock(&dev->struct_mutex);
	}
}
EXPORT_SYMBOL(drm_bo_usage_deref_unlocked);

void drm_putback_buffer_objects(struct drm_device *dev)
{
	struct drm_buffer_manager *bm = &dev->bm;
	struct list_head *list = &bm->unfenced;
	struct drm_buffer_object *entry, *next;

	mutex_lock(&dev->struct_mutex);
	list_for_each_entry_safe(entry, next, list, lru) {
		atomic_inc(&entry->usage);
		mutex_unlock(&dev->struct_mutex);

		mutex_lock(&entry->mutex);
		BUG_ON(!(entry->priv_flags & _DRM_BO_FLAG_UNFENCED));
		mutex_lock(&dev->struct_mutex);

		list_del_init(&entry->lru);
		DRM_FLAG_MASKED(entry->priv_flags, 0, _DRM_BO_FLAG_UNFENCED);
		wake_up_all(&entry->event_queue);

		/*
		 * FIXME: Might want to put back on head of list
		 * instead of tail here.
		 */

		drm_bo_add_to_lru(entry);
		mutex_unlock(&entry->mutex);
		drm_bo_usage_deref_locked(&entry);
	}
	mutex_unlock(&dev->struct_mutex);
}
EXPORT_SYMBOL(drm_putback_buffer_objects);


/*
 * Note. The caller has to register (if applicable)
 * and deregister fence object usage.
 */

int drm_fence_buffer_objects(struct drm_device *dev,
			     struct list_head *list,
			     uint32_t fence_flags,
			     struct drm_fence_object *fence,
			     struct drm_fence_object **used_fence)
{
	struct drm_buffer_manager *bm = &dev->bm;
	struct drm_buffer_object *entry;
	uint32_t fence_type = 0;
	uint32_t fence_class = ~0;
	int count = 0;
	int ret = 0;
	struct list_head *l;

	mutex_lock(&dev->struct_mutex);

	if (!list)
		list = &bm->unfenced;

	if (fence)
		fence_class = fence->fence_class;

	list_for_each_entry(entry, list, lru) {
		BUG_ON(!(entry->priv_flags & _DRM_BO_FLAG_UNFENCED));
		fence_type |= entry->new_fence_type;
		if (fence_class == ~0)
			fence_class = entry->new_fence_class;
		else if (entry->new_fence_class != fence_class) {
			DRM_ERROR("Unmatching fence classes on unfenced list: "
				  "%d and %d.\n",
				  fence_class,
				  entry->new_fence_class);
			ret = -EINVAL;
			goto out;
		}
		count++;
	}

	if (!count) {
		ret = -EINVAL;
		goto out;
	}

	if (fence) {
		if ((fence_type & fence->type) != fence_type ||
		    (fence->fence_class != fence_class)) {
			DRM_ERROR("Given fence doesn't match buffers "
				  "on unfenced list.\n");
			ret = -EINVAL;
			goto out;
		}
	} else {
		mutex_unlock(&dev->struct_mutex);
		ret = drm_fence_object_create(dev, fence_class, fence_type,
					      fence_flags | DRM_FENCE_FLAG_EMIT,
					      &fence);
		mutex_lock(&dev->struct_mutex);
		if (ret)
			goto out;
	}

	count = 0;
	l = list->next;
	while (l != list) {
		prefetch(l->next);
		entry = list_entry(l, struct drm_buffer_object, lru);
		atomic_inc(&entry->usage);
		mutex_unlock(&dev->struct_mutex);
		mutex_lock(&entry->mutex);
		mutex_lock(&dev->struct_mutex);
		list_del_init(l);
		if (entry->priv_flags & _DRM_BO_FLAG_UNFENCED) {
			count++;
			if (entry->fence)
				drm_fence_usage_deref_locked(&entry->fence);
			entry->fence = drm_fence_reference_locked(fence);
			entry->fence_class = entry->new_fence_class;
			entry->fence_type = entry->new_fence_type;
			DRM_FLAG_MASKED(entry->priv_flags, 0,
					_DRM_BO_FLAG_UNFENCED);
			wake_up_all(&entry->event_queue);
			drm_bo_add_to_lru(entry);
		}
		mutex_unlock(&entry->mutex);
		drm_bo_usage_deref_locked(&entry);
		l = list->next;
	}
	DRM_DEBUG("Fenced %d buffers\n", count);
out:
	mutex_unlock(&dev->struct_mutex);
	*used_fence = fence;
	return ret;
}
EXPORT_SYMBOL(drm_fence_buffer_objects);

/*
 * bo->mutex locked
 */

static int drm_bo_evict(struct drm_buffer_object *bo, unsigned mem_type,
			int no_wait)
{
	int ret = 0;
	struct drm_device *dev = bo->dev;
	struct drm_bo_mem_reg evict_mem;

	/*
	 * Someone might have modified the buffer before we took the
	 * buffer mutex.
	 */

	do {
		bo->priv_flags &= ~_DRM_BO_FLAG_UNLOCKED;

		if (unlikely(bo->mem.flags &
			     (DRM_BO_FLAG_NO_MOVE | DRM_BO_FLAG_NO_EVICT)))
			goto out_unlock;
		if (unlikely(bo->priv_flags & _DRM_BO_FLAG_UNFENCED))
			goto out_unlock;
		if (unlikely(bo->mem.mem_type != mem_type))
			goto out_unlock;
		ret = drm_bo_wait(bo, 0, 1, no_wait, 0);
		if (ret)
			goto out_unlock;

	} while(bo->priv_flags & _DRM_BO_FLAG_UNLOCKED);

	evict_mem = bo->mem;
	evict_mem.mm_node = NULL;

	evict_mem = bo->mem;
	evict_mem.proposed_flags = dev->driver->bo_driver->evict_flags(bo);

	mutex_lock(&dev->struct_mutex);
	list_del_init(&bo->lru);
	mutex_unlock(&dev->struct_mutex);

	ret = drm_bo_mem_space(bo, &evict_mem, no_wait);

	if (ret) {
		if (ret != -EAGAIN)
			DRM_ERROR("Failed to find memory space for "
				  "buffer 0x%p eviction.\n", bo);
		goto out;
	}

	ret = drm_bo_handle_move_mem(bo, &evict_mem, 1, no_wait);

	if (ret) {
		if (ret != -EAGAIN)
			DRM_ERROR("Buffer eviction failed\n");
		goto out;
	}

	DRM_FLAG_MASKED(bo->priv_flags, _DRM_BO_FLAG_EVICTED,
			_DRM_BO_FLAG_EVICTED);

out:
	mutex_lock(&dev->struct_mutex);
	if (evict_mem.mm_node) {
		if (evict_mem.mm_node != bo->pinned_node)
			drm_mm_put_block(evict_mem.mm_node);
		evict_mem.mm_node = NULL;
	}
	drm_bo_add_to_lru(bo);
	BUG_ON(bo->priv_flags & _DRM_BO_FLAG_UNLOCKED);
out_unlock:
	mutex_unlock(&dev->struct_mutex);

	return ret;
}

/**
 * Repeatedly evict memory from the LRU for @mem_type until we create enough
 * space, or we've evicted everything and there isn't enough space.
 */
static int drm_bo_mem_force_space(struct drm_device *dev,
				  struct drm_bo_mem_reg *mem,
				  uint32_t mem_type, int no_wait)
{
	struct drm_mm_node *node;
	struct drm_buffer_manager *bm = &dev->bm;
	struct drm_buffer_object *entry;
	struct drm_mem_type_manager *man = &bm->man[mem_type];
	struct list_head *lru;
	unsigned long num_pages = mem->num_pages;
	int ret;

	mutex_lock(&dev->struct_mutex);
	do {
		node = drm_mm_search_free(&man->manager, num_pages,
					  mem->page_alignment, 1);
		if (node)
			break;

		lru = &man->lru;
		if (lru->next == lru)
			break;

		entry = list_entry(lru->next, struct drm_buffer_object, lru);
		atomic_inc(&entry->usage);
		mutex_unlock(&dev->struct_mutex);
		mutex_lock(&entry->mutex);
		ret = drm_bo_evict(entry, mem_type, no_wait);
		mutex_unlock(&entry->mutex);
		drm_bo_usage_deref_unlocked(&entry);
		if (ret)
			return ret;
		mutex_lock(&dev->struct_mutex);
	} while (1);

	if (!node) {
		mutex_unlock(&dev->struct_mutex);
		return -ENOMEM;
	}

	node = drm_mm_get_block(node, num_pages, mem->page_alignment);
	if (unlikely(!node)) {
		mutex_unlock(&dev->struct_mutex);
		return -ENOMEM;
	}

	mutex_unlock(&dev->struct_mutex);
	mem->mm_node = node;
	mem->mem_type = mem_type;
	return 0;
}

static int drm_bo_mt_compatible(struct drm_mem_type_manager *man,
				int disallow_fixed,
				uint32_t mem_type,
				uint64_t mask, uint32_t *res_mask)
{
	uint64_t cur_flags = drm_bo_type_flags(mem_type);
	uint64_t flag_diff;

	if ((man->flags & _DRM_FLAG_MEMTYPE_FIXED) && disallow_fixed)
		return 0;
	if (man->flags & _DRM_FLAG_MEMTYPE_CACHED)
		cur_flags |= DRM_BO_FLAG_CACHED;
	if (man->flags & _DRM_FLAG_MEMTYPE_MAPPABLE)
		cur_flags |= DRM_BO_FLAG_MAPPABLE;
	if (man->flags & _DRM_FLAG_MEMTYPE_CSELECT)
		DRM_FLAG_MASKED(cur_flags, mask, DRM_BO_FLAG_CACHED);

	if ((cur_flags & mask & DRM_BO_MASK_MEM) == 0)
		return 0;

	if (mem_type == DRM_BO_MEM_LOCAL) {
		*res_mask = cur_flags;
		return 1;
	}

	flag_diff = (mask ^ cur_flags);
	if (flag_diff & DRM_BO_FLAG_CACHED_MAPPED)
		cur_flags |= DRM_BO_FLAG_CACHED_MAPPED;

	if ((flag_diff & DRM_BO_FLAG_CACHED) &&
	    (!(mask & DRM_BO_FLAG_CACHED) ||
	     (mask & DRM_BO_FLAG_FORCE_CACHING)))
		return 0;

	if ((flag_diff & DRM_BO_FLAG_MAPPABLE) &&
	    ((mask & DRM_BO_FLAG_MAPPABLE) ||
	     (mask & DRM_BO_FLAG_FORCE_MAPPABLE)))
		return 0;

	*res_mask = cur_flags;
	return 1;
}

/**
 * Creates space for memory region @mem according to its type.
 *
 * This function first searches for free space in compatible memory types in
 * the priority order defined by the driver.  If free space isn't found, then
 * drm_bo_mem_force_space is attempted in priority order to evict and find
 * space.
 */
int drm_bo_mem_space(struct drm_buffer_object *bo,
		     struct drm_bo_mem_reg *mem, int no_wait)
{
	struct drm_device *dev = bo->dev;
	struct drm_buffer_manager *bm = &dev->bm;
	struct drm_mem_type_manager *man;

	uint32_t num_prios = dev->driver->bo_driver->num_mem_type_prio;
	const uint32_t *prios = dev->driver->bo_driver->mem_type_prio;
	uint32_t i;
	uint32_t mem_type = DRM_BO_MEM_LOCAL;
	uint32_t cur_flags;
	int type_found = 0;
	int type_ok = 0;
	int has_eagain = 0;
	struct drm_mm_node *node = NULL;
	int ret;

	mem->mm_node = NULL;
	for (i = 0; i < num_prios; ++i) {
		mem_type = prios[i];
		man = &bm->man[mem_type];

		type_ok = drm_bo_mt_compatible(man,
					       bo->type == drm_bo_type_user,
					       mem_type, mem->proposed_flags,
					       &cur_flags);

		if (!type_ok)
			continue;

		if (mem_type == DRM_BO_MEM_LOCAL)
			break;

		if ((mem_type == bo->pinned_mem_type) &&
		    (bo->pinned_node != NULL)) {
			node = bo->pinned_node;
			break;
		}

		mutex_lock(&dev->struct_mutex);
		if (man->has_type && man->use_type) {
			type_found = 1;
			node = drm_mm_search_free(&man->manager, mem->num_pages,
						  mem->page_alignment, 1);
			if (node)
				node = drm_mm_get_block(node, mem->num_pages,
							mem->page_alignment);
		}
		mutex_unlock(&dev->struct_mutex);
		if (node)
			break;
	}

	if ((type_ok && (mem_type == DRM_BO_MEM_LOCAL)) || node) {
		mem->mm_node = node;
		mem->mem_type = mem_type;
		mem->flags = cur_flags;
		return 0;
	}

	if (!type_found)
		return -EINVAL;

	num_prios = dev->driver->bo_driver->num_mem_busy_prio;
	prios = dev->driver->bo_driver->mem_busy_prio;

	for (i = 0; i < num_prios; ++i) {
		mem_type = prios[i];
		man = &bm->man[mem_type];

		if (!man->has_type)
			continue;

		if (!drm_bo_mt_compatible(man,
					  bo->type == drm_bo_type_user,
					  mem_type,
					  mem->proposed_flags,
					  &cur_flags))
			continue;

		ret = drm_bo_mem_force_space(dev, mem, mem_type, no_wait);

		if (ret == 0 && mem->mm_node) {
			mem->flags = cur_flags;
			return 0;
		}

		if (ret == -EAGAIN)
			has_eagain = 1;
	}

	ret = (has_eagain) ? -EAGAIN : -ENOMEM;
	return ret;
}
EXPORT_SYMBOL(drm_bo_mem_space);

/*
 * drm_bo_propose_flags:
 *
 * @bo: the buffer object getting new flags
 *
 * @new_flags: the new set of proposed flag bits
 *
 * @new_mask: the mask of bits changed in new_flags
 *
 * Modify the proposed_flag bits in @bo
 */
static int drm_bo_modify_proposed_flags (struct drm_buffer_object *bo,
					 uint64_t new_flags, uint64_t new_mask)
{
	uint32_t new_access;

	/* Copy unchanging bits from existing proposed_flags */
	DRM_FLAG_MASKED(new_flags, bo->mem.proposed_flags, ~new_mask);
	 
	if (bo->type == drm_bo_type_user &&
	    ((new_flags & (DRM_BO_FLAG_CACHED | DRM_BO_FLAG_FORCE_CACHING)) !=
	     (DRM_BO_FLAG_CACHED | DRM_BO_FLAG_FORCE_CACHING))) {
		DRM_ERROR("User buffers require cache-coherent memory.\n");
		return -EINVAL;
	}

	if (bo->type != drm_bo_type_kernel && (new_mask & DRM_BO_FLAG_NO_EVICT) && !DRM_SUSER(DRM_CURPROC)) {
		DRM_ERROR("DRM_BO_FLAG_NO_EVICT is only available to priviliged processes.\n");
		return -EPERM;
	}

	if (likely(new_mask & DRM_BO_MASK_MEM) &&
	    (bo->mem.flags & DRM_BO_FLAG_NO_EVICT) &&
	    !DRM_SUSER(DRM_CURPROC)) {
		if (likely(bo->mem.flags & new_flags & new_mask &
			   DRM_BO_MASK_MEM))
			new_flags = (new_flags & ~DRM_BO_MASK_MEM) |
				(bo->mem.flags & DRM_BO_MASK_MEM);
		else {
			DRM_ERROR("Incompatible memory type specification "
				  "for NO_EVICT buffer.\n");
			return -EPERM;
		}
	}

	if ((new_flags & DRM_BO_FLAG_NO_MOVE)) {
		DRM_ERROR("DRM_BO_FLAG_NO_MOVE is not properly implemented yet.\n");
		return -EPERM;
	}

	new_access = new_flags & (DRM_BO_FLAG_EXE | DRM_BO_FLAG_WRITE |
				  DRM_BO_FLAG_READ);

	if (new_access == 0) {
		DRM_ERROR("Invalid buffer object rwx properties\n");
		return -EINVAL;
	}

	bo->mem.proposed_flags = new_flags;
	return 0;
}

/*
 * Call dev->struct_mutex locked.
 */

struct drm_buffer_object *drm_lookup_buffer_object(struct drm_file *file_priv,
					      uint32_t handle, int check_owner)
{
	struct drm_user_object *uo;
	struct drm_buffer_object *bo;

	uo = drm_lookup_user_object(file_priv, handle);

	if (!uo || (uo->type != drm_buffer_type)) {
		DRM_ERROR("Could not find buffer object 0x%08x\n", handle);
		return NULL;
	}

	if (check_owner && file_priv != uo->owner) {
		if (!drm_lookup_ref_object(file_priv, uo, _DRM_REF_USE))
			return NULL;
	}

	bo = drm_user_object_entry(uo, struct drm_buffer_object, base);
	atomic_inc(&bo->usage);
	return bo;
}
EXPORT_SYMBOL(drm_lookup_buffer_object);

/*
 * Call bo->mutex locked.
 * Returns -EBUSY if the buffer is currently rendered to or from. 0 otherwise.
 * Doesn't do any fence flushing as opposed to the drm_bo_busy function.
 */

static int drm_bo_quick_busy(struct drm_buffer_object *bo, int check_unfenced)
{
	struct drm_fence_object *fence = bo->fence;

	if (check_unfenced && (bo->priv_flags & _DRM_BO_FLAG_UNFENCED))
		return -EBUSY;

	if (fence) {
		if (drm_fence_object_signaled(fence, bo->fence_type)) {
			drm_fence_usage_deref_unlocked(&bo->fence);
			return 0;
		}
		return -EBUSY;
	}
	return 0;
}

int drm_bo_evict_cached(struct drm_buffer_object *bo)
{
	int ret = 0;

	BUG_ON(bo->priv_flags & _DRM_BO_FLAG_UNFENCED);
	if (bo->mem.mm_node)
		ret = drm_bo_evict(bo, DRM_BO_MEM_TT, 1);
	return ret;
}

EXPORT_SYMBOL(drm_bo_evict_cached);
/*
 * Wait until a buffer is unmapped.
 */

static int drm_bo_wait_unmapped(struct drm_buffer_object *bo, int no_wait)
{
	int ret = 0;

	if (likely(atomic_read(&bo->mapped)) == 0)
		return 0;

	if (unlikely(no_wait))
		return -EBUSY;

	do {
		mutex_unlock(&bo->mutex);
		ret = wait_event_interruptible(bo->event_queue,
					       atomic_read(&bo->mapped) == 0);
		mutex_lock(&bo->mutex);
		bo->priv_flags |= _DRM_BO_FLAG_UNLOCKED;

		if (ret == -ERESTARTSYS)
			ret = -EAGAIN;
	} while((ret == 0) && atomic_read(&bo->mapped) > 0);

	return ret;
}

/*
 * Fill in the ioctl reply argument with buffer info.
 * Bo locked.
 */

void drm_bo_fill_rep_arg(struct drm_buffer_object *bo,
			 struct drm_bo_info_rep *rep)
{
	if (!rep)
		return;

	rep->handle = bo->base.hash.key;
	rep->flags = bo->mem.flags;
	rep->size = bo->num_pages * PAGE_SIZE;
	rep->offset = bo->offset;

	/*
	 * drm_bo_type_device buffers have user-visible
	 * handles which can be used to share across
	 * processes. Hand that back to the application
	 */
	if (bo->type == drm_bo_type_device)
		rep->arg_handle = bo->map_list.user_token;
	else
		rep->arg_handle = 0;

	rep->proposed_flags = bo->mem.proposed_flags;
	rep->buffer_start = bo->buffer_start;
	rep->fence_flags = bo->fence_type;
	rep->rep_flags = 0;
	rep->page_alignment = bo->mem.page_alignment;

	if ((bo->priv_flags & _DRM_BO_FLAG_UNFENCED) || drm_bo_quick_busy(bo, 1)) {
		DRM_FLAG_MASKED(rep->rep_flags, DRM_BO_REP_BUSY,
				DRM_BO_REP_BUSY);
	}
}
EXPORT_SYMBOL(drm_bo_fill_rep_arg);

/*
 * Wait for buffer idle and register that we've mapped the buffer.
 * Mapping is registered as a drm_ref_object with type _DRM_REF_TYPE1,
 * so that if the client dies, the mapping is automatically
 * unregistered.
 */

static int drm_buffer_object_map(struct drm_file *file_priv, uint32_t handle,
				 uint32_t map_flags, unsigned hint,
				 struct drm_bo_info_rep *rep)
{
	struct drm_buffer_object *bo;
	struct drm_device *dev = file_priv->minor->dev;
	int ret = 0;
	int no_wait = hint & DRM_BO_HINT_DONT_BLOCK;

	mutex_lock(&dev->struct_mutex);
	bo = drm_lookup_buffer_object(file_priv, handle, 1);
	mutex_unlock(&dev->struct_mutex);

	if (!bo)
		return -EINVAL;

	mutex_lock(&bo->mutex);
	do {
		bo->priv_flags &= ~_DRM_BO_FLAG_UNLOCKED;

		ret = drm_bo_wait(bo, 0, 1, no_wait, 1);
		if (unlikely(ret))
			goto out;

		if (bo->mem.flags & DRM_BO_FLAG_CACHED_MAPPED)
			drm_bo_evict_cached(bo);

	} while (unlikely(bo->priv_flags & _DRM_BO_FLAG_UNLOCKED));

	atomic_inc(&bo->mapped);
	mutex_lock(&dev->struct_mutex);
	ret = drm_add_ref_object(file_priv, &bo->base, _DRM_REF_TYPE1);
	mutex_unlock(&dev->struct_mutex);
	if (ret) {
		if (atomic_dec_and_test(&bo->mapped))
			wake_up_all(&bo->event_queue);

	} else
		drm_bo_fill_rep_arg(bo, rep);

 out:
	mutex_unlock(&bo->mutex);
	drm_bo_usage_deref_unlocked(&bo);

	return ret;
}

static int drm_buffer_object_unmap(struct drm_file *file_priv, uint32_t handle)
{
	struct drm_device *dev = file_priv->minor->dev;
	struct drm_buffer_object *bo;
	struct drm_ref_object *ro;
	int ret = 0;

	mutex_lock(&dev->struct_mutex);

	bo = drm_lookup_buffer_object(file_priv, handle, 1);
	if (!bo) {
		ret = -EINVAL;
		goto out;
	}

	ro = drm_lookup_ref_object(file_priv, &bo->base, _DRM_REF_TYPE1);
	if (!ro) {
		ret = -EINVAL;
		goto out;
	}

	drm_remove_ref_object(file_priv, ro);
	drm_bo_usage_deref_locked(&bo);
out:
	mutex_unlock(&dev->struct_mutex);
	return ret;
}

/*
 * Call struct-sem locked.
 */

static void drm_buffer_user_object_unmap(struct drm_file *file_priv,
					 struct drm_user_object *uo,
					 enum drm_ref_type action)
{
	struct drm_buffer_object *bo =
	    drm_user_object_entry(uo, struct drm_buffer_object, base);

	/*
	 * We DON'T want to take the bo->lock here, because we want to
	 * hold it when we wait for unmapped buffer.
	 */

	BUG_ON(action != _DRM_REF_TYPE1);

	if (atomic_dec_and_test(&bo->mapped))
		wake_up_all(&bo->event_queue);
}

/*
 * bo->mutex locked.
 * Note that new_mem_flags are NOT transferred to the bo->mem.proposed_flags.
 */

int drm_bo_move_buffer(struct drm_buffer_object *bo, uint64_t new_mem_flags,
		       int no_wait, int move_unfenced)
{
	struct drm_device *dev = bo->dev;
	struct drm_buffer_manager *bm = &dev->bm;
	int ret = 0;
	struct drm_bo_mem_reg mem;

	BUG_ON(bo->fence != NULL);

	mem.num_pages = bo->num_pages;
	mem.size = mem.num_pages << PAGE_SHIFT;
	mem.proposed_flags = new_mem_flags;
	mem.page_alignment = bo->mem.page_alignment;

	mutex_lock(&bm->evict_mutex);
	mutex_lock(&dev->struct_mutex);
	list_del_init(&bo->lru);
	mutex_unlock(&dev->struct_mutex);

	/*
	 * Determine where to move the buffer.
	 */
	ret = drm_bo_mem_space(bo, &mem, no_wait);
	if (ret)
		goto out_unlock;

	ret = drm_bo_handle_move_mem(bo, &mem, 0, no_wait);

out_unlock:
	mutex_lock(&dev->struct_mutex);
	if (ret || !move_unfenced) {
		if (mem.mm_node) {
			if (mem.mm_node != bo->pinned_node)
				drm_mm_put_block(mem.mm_node);
			mem.mm_node = NULL;
		}
		drm_bo_add_to_lru(bo);
		if (bo->priv_flags & _DRM_BO_FLAG_UNFENCED) {
			wake_up_all(&bo->event_queue);
			DRM_FLAG_MASKED(bo->priv_flags, 0,
					_DRM_BO_FLAG_UNFENCED);
		}
	} else {
		list_add_tail(&bo->lru, &bm->unfenced);
		DRM_FLAG_MASKED(bo->priv_flags, _DRM_BO_FLAG_UNFENCED,
				_DRM_BO_FLAG_UNFENCED);
	}
	mutex_unlock(&dev->struct_mutex);
	mutex_unlock(&bm->evict_mutex);
	return ret;
}

static int drm_bo_mem_compat(struct drm_bo_mem_reg *mem)
{
	uint32_t flag_diff = (mem->proposed_flags ^ mem->flags);

	if ((mem->proposed_flags & mem->flags & DRM_BO_MASK_MEM) == 0)
		return 0;
	if ((flag_diff & DRM_BO_FLAG_CACHED) &&
	    (/* !(mem->proposed_flags & DRM_BO_FLAG_CACHED) ||*/
	     (mem->proposed_flags & DRM_BO_FLAG_FORCE_CACHING)))
		return 0;

	if ((flag_diff & DRM_BO_FLAG_MAPPABLE) &&
	    ((mem->proposed_flags & DRM_BO_FLAG_MAPPABLE) ||
	     (mem->proposed_flags & DRM_BO_FLAG_FORCE_MAPPABLE)))
		return 0;
	return 1;
}

/**
 * drm_buffer_object_validate:
 *
 * @bo: the buffer object to modify
 *
 * @fence_class: the new fence class covering this buffer
 *
 * @move_unfenced: a boolean indicating whether switching the
 * memory space of this buffer should cause the buffer to
 * be placed on the unfenced list.
 *
 * @no_wait: whether this function should return -EBUSY instead
 * of waiting.
 *
 * Change buffer access parameters. This can involve moving
 * the buffer to the correct memory type, pinning the buffer
 * or changing the class/type of fence covering this buffer
 *
 * Must be called with bo locked.
 */

static int drm_buffer_object_validate(struct drm_buffer_object *bo,
				      uint32_t fence_class,
				      int move_unfenced, int no_wait,
				      int move_buffer)
{
	struct drm_device *dev = bo->dev;
	struct drm_buffer_manager *bm = &dev->bm;
	int ret;

	if (move_buffer) {
		ret = drm_bo_move_buffer(bo, bo->mem.proposed_flags, no_wait,
					 move_unfenced);
		if (ret) {
			if (ret != -EAGAIN)
				DRM_ERROR("Failed moving buffer.\n");
			if (ret == -ENOMEM)
				DRM_ERROR("Out of aperture space or "
					  "DRM memory quota.\n");
			return ret;
		}
	}

	/*
	 * Pinned buffers.
	 */

	if (bo->mem.proposed_flags & (DRM_BO_FLAG_NO_EVICT | DRM_BO_FLAG_NO_MOVE)) {
		bo->pinned_mem_type = bo->mem.mem_type;
		mutex_lock(&dev->struct_mutex);
		list_del_init(&bo->pinned_lru);
		drm_bo_add_to_pinned_lru(bo);

		if (bo->pinned_node != bo->mem.mm_node) {
			if (bo->pinned_node != NULL)
				drm_mm_put_block(bo->pinned_node);
			bo->pinned_node = bo->mem.mm_node;
		}

		mutex_unlock(&dev->struct_mutex);

	} else if (bo->pinned_node != NULL) {

		mutex_lock(&dev->struct_mutex);

		if (bo->pinned_node != bo->mem.mm_node)
			drm_mm_put_block(bo->pinned_node);

		list_del_init(&bo->pinned_lru);
		bo->pinned_node = NULL;
		mutex_unlock(&dev->struct_mutex);

	}

	/*
	 * We might need to add a TTM.
	 */

	if (bo->mem.mem_type == DRM_BO_MEM_LOCAL && bo->ttm == NULL) {
		ret = drm_bo_add_ttm(bo);
		if (ret)
			return ret;
	}
	/*
	 * Validation has succeeded, move the access and other
	 * non-mapping-related flag bits from the proposed flags to
	 * the active flags
	 */

	DRM_FLAG_MASKED(bo->mem.flags, bo->mem.proposed_flags, ~DRM_BO_MASK_MEMTYPE);

	/*
	 * Finally, adjust lru to be sure.
	 */

	mutex_lock(&dev->struct_mutex);
	list_del(&bo->lru);
	if (move_unfenced) {
		list_add_tail(&bo->lru, &bm->unfenced);
		DRM_FLAG_MASKED(bo->priv_flags, _DRM_BO_FLAG_UNFENCED,
				_DRM_BO_FLAG_UNFENCED);
	} else {
		drm_bo_add_to_lru(bo);
		if (bo->priv_flags & _DRM_BO_FLAG_UNFENCED) {
			wake_up_all(&bo->event_queue);
			DRM_FLAG_MASKED(bo->priv_flags, 0,
					_DRM_BO_FLAG_UNFENCED);
		}
	}
	mutex_unlock(&dev->struct_mutex);

	return 0;
}

/*
 * This function is called with bo->mutex locked, but may release it
 * temporarily to wait for events.
 */

static int drm_bo_prepare_for_validate(struct drm_buffer_object *bo,
				       uint64_t flags,
				       uint64_t mask,
				       uint32_t hint,
				       uint32_t fence_class,
				       int no_wait,
				       int *move_buffer)
{
	struct drm_device *dev = bo->dev;
	struct drm_bo_driver *driver = dev->driver->bo_driver;
	uint32_t ftype;

	int ret;

	DRM_DEBUG("Proposed flags 0x%016llx, Old flags 0x%016llx\n",
		  (unsigned long long) bo->mem.proposed_flags,
		  (unsigned long long) bo->mem.flags);

	ret = drm_bo_modify_proposed_flags (bo, flags, mask);
	if (ret)
		return ret;

	ret = drm_bo_wait_unmapped(bo, no_wait);
	if (ret)
		return ret;

	ret = driver->fence_type(bo, &fence_class, &ftype);

	if (ret) {
		DRM_ERROR("Driver did not support given buffer permissions.\n");
		return ret;
	}

	/*
	 * We're switching command submission mechanism,
	 * or cannot simply rely on the hardware serializing for us.
	 * Insert a driver-dependant barrier or wait for buffer idle.
	 */

	if ((fence_class != bo->fence_class) ||
	    ((ftype ^ bo->fence_type) & bo->fence_type)) {

		ret = -EINVAL;
		if (driver->command_stream_barrier) {
			ret = driver->command_stream_barrier(bo,
							     fence_class,
							     ftype,
							     no_wait);
		}
		if (ret && ret != -EAGAIN) 
			ret = drm_bo_wait(bo, 0, 1, no_wait, 1);
		
		if (ret)
			return ret;
	}

	bo->new_fence_class = fence_class;
	bo->new_fence_type = ftype;

	/*
	 * Check whether we need to move buffer.
	 */

	*move_buffer = 0;
	if (!drm_bo_mem_compat(&bo->mem)) {
		*move_buffer = 1;
		ret = drm_bo_wait(bo, 0, 1, no_wait, 1);
	}

	return ret;
}

/**
 * drm_bo_do_validate:
 *
 * @bo:	the buffer object
 *
 * @flags: access rights, mapping parameters and cacheability. See
 * the DRM_BO_FLAG_* values in drm.h
 *
 * @mask: Which flag values to change; this allows callers to modify
 * things without knowing the current state of other flags.
 *
 * @hint: changes the proceedure for this operation, see the DRM_BO_HINT_*
 * values in drm.h.
 *
 * @fence_class: a driver-specific way of doing fences. Presumably,
 * this would be used if the driver had more than one submission and
 * fencing mechanism. At this point, there isn't any use of this
 * from the user mode code.
 *
 * @rep: To be stuffed with the reply from validation
 * 
 * 'validate' a buffer object. This changes where the buffer is
 * located, along with changing access modes.
 */

int drm_bo_do_validate(struct drm_buffer_object *bo,
		       uint64_t flags, uint64_t mask, uint32_t hint,
		       uint32_t fence_class,
		       struct drm_bo_info_rep *rep)
{
	int ret;
	int no_wait = (hint & DRM_BO_HINT_DONT_BLOCK) != 0;
	int move_buffer;

	mutex_lock(&bo->mutex);

	do {
		bo->priv_flags &= ~_DRM_BO_FLAG_UNLOCKED;

		ret = drm_bo_prepare_for_validate(bo, flags, mask, hint,
						  fence_class, no_wait,
						  &move_buffer);
		if (ret)
			goto out;

	} while(unlikely(bo->priv_flags & _DRM_BO_FLAG_UNLOCKED));

	ret = drm_buffer_object_validate(bo,
					 fence_class,
					 !(hint & DRM_BO_HINT_DONT_FENCE),
					 no_wait,
					 move_buffer);

	BUG_ON(bo->priv_flags & _DRM_BO_FLAG_UNLOCKED);
out:
	if (rep)
		drm_bo_fill_rep_arg(bo, rep);

	mutex_unlock(&bo->mutex);

	return ret;
}
EXPORT_SYMBOL(drm_bo_do_validate);

/**
 * drm_bo_handle_validate
 *
 * @file_priv: the drm file private, used to get a handle to the user context
 *
 * @handle: the buffer object handle
 *
 * @flags: access rights, mapping parameters and cacheability. See
 * the DRM_BO_FLAG_* values in drm.h
 *
 * @mask: Which flag values to change; this allows callers to modify
 * things without knowing the current state of other flags.
 *
 * @hint: changes the proceedure for this operation, see the DRM_BO_HINT_*
 * values in drm.h.
 *
 * @fence_class: a driver-specific way of doing fences. Presumably,
 * this would be used if the driver had more than one submission and
 * fencing mechanism. At this point, there isn't any use of this
 * from the user mode code.
 *
 * @rep: To be stuffed with the reply from validation
 *
 * @bp_rep: To be stuffed with the buffer object pointer
 *
 * Perform drm_bo_do_validate on a buffer referenced by a user-space handle instead
 * of a pointer to a buffer object. Optionally return a pointer to the buffer object.
 * This is a convenience wrapper only.
 */

int drm_bo_handle_validate(struct drm_file *file_priv, uint32_t handle,
			   uint64_t flags, uint64_t mask,
			   uint32_t hint,
			   uint32_t fence_class,
			   struct drm_bo_info_rep *rep,
			   struct drm_buffer_object **bo_rep)
{
	struct drm_device *dev = file_priv->minor->dev;
	struct drm_buffer_object *bo;
	int ret;

	mutex_lock(&dev->struct_mutex);
	bo = drm_lookup_buffer_object(file_priv, handle, 1);
	mutex_unlock(&dev->struct_mutex);

	if (!bo)
		return -EINVAL;

	if (bo->base.owner != file_priv)
		mask &= ~(DRM_BO_FLAG_NO_EVICT | DRM_BO_FLAG_NO_MOVE);

	ret = drm_bo_do_validate(bo, flags, mask, hint, fence_class, rep);

	if (!ret && bo_rep)
		*bo_rep = bo;
	else
		drm_bo_usage_deref_unlocked(&bo);

	return ret;
}
EXPORT_SYMBOL(drm_bo_handle_validate);


static int drm_bo_handle_info(struct drm_file *file_priv, uint32_t handle,
			      struct drm_bo_info_rep *rep)
{
	struct drm_device *dev = file_priv->minor->dev;
	struct drm_buffer_object *bo;

	mutex_lock(&dev->struct_mutex);
	bo = drm_lookup_buffer_object(file_priv, handle, 1);
	mutex_unlock(&dev->struct_mutex);

	if (!bo)
		return -EINVAL;

	mutex_lock(&bo->mutex);

	/*
	 * FIXME: Quick busy here?
	 */

	drm_bo_busy(bo, 1);
	drm_bo_fill_rep_arg(bo, rep);
	mutex_unlock(&bo->mutex);
	drm_bo_usage_deref_unlocked(&bo);
	return 0;
}

static int drm_bo_handle_wait(struct drm_file *file_priv, uint32_t handle,
			      uint32_t hint,
			      struct drm_bo_info_rep *rep)
{
	struct drm_device *dev = file_priv->minor->dev;
	struct drm_buffer_object *bo;
	int no_wait = hint & DRM_BO_HINT_DONT_BLOCK;
	int ret;

	mutex_lock(&dev->struct_mutex);