Annotation of /drakx-kbd-mouse-x11/trunk/tools/display_driver_helper

#!/bin/sh
#
# Display driver helper
#
# Copyright (c) 2010, 2011 Anssi Hannula <anssi.hannula@iki.fi>
#
# - Load drivers for specified modaliases, skipping disabled display drivers
#   that would cause conflicts (KMS vs. vesa, KMS vs. proprietary).
# - Get information about enabled driver modules
# - Check that the loaded modules are correct
#
# Licensed under terms of GPLv2 or later.
#
# When updating, check:
# - the variables below
# - check_driver function
# - check_dkms_status function
#

if [ -n "$DEBUG_DISPLAY_DRIVER_HELPER" ]; then
        echo "$(date) $*" >> /dev/ddh_debug
        exec 2>>/dev/ddh_debug
        set -x
fi

export LC_ALL=C

KMS_DRIVERS="i915 radeon nouveau"
# module names at run-time (hence nvidia instead of nvidia*):
KNOWN_MODULES="i915|radeon|nouveau|fglrx|nvidia"

XORG_i915="intel"
CONFLICTS_i915=""

XORG_nouveau="nouveau"
CONFLICTS_nouveau="nv nvidia"

XORG_radeon="ati radeon"
CONFLICTS_radeon="fglrx"

# Note: no /usr
# See end of script for descriptions of global variables.
check_driver() {
        local name="$1"
        case "$name" in
        i915)
                # implicitely loaded by X.org
                check_xorg $name 0 || return 1
                IS_KMS=1
                ;;
        radeon)
                # implicitely loaded by X.org
                check_xorg $name 0 || return 1
                # Do not load if the proprietary driver is temporarily disabled
                # on a PowerXpress system.
                # TODO: this check could be omitted if radeon was explicitely
                # specified in xorg.conf - but that is only known by check_xorg.
                check_gl /etc/fglrx/pxpress-free.ld.so.conf && return 1
                IS_KMS=1
                # radeon needs to loaded before X server
                NEEDS_LOAD_NOW=1
                ;;
        nouveau)
                # these KMS drivers require an explicit directive in xorg.conf
                check_xorg $name 1 || return 1
                IS_KMS=1
                ;;
        fglrx)
                check_xorg fglrx 1 || return 1
                check_dkms fglrx || return 1
                ;;
        nvidia)
                # manually installed driver or a call from check_loaded()
                UNSURE=1
                check_xorg nvidia 1 || return 1
                ;;
        nvidiafb)
                # this is only reached if nvidiafb is manually unblacklisted
                return 2
                ;;
        nvidia*)
                [ "$name" = "nvidia_current" ] && name=nvidia-current
                # there are multiple co-installable driver versions, so check
                # the active alternative as well
                check_gl /etc/$name/ld.so.conf || return 1
                check_xorg nvidia 1 || return 1
                check_dkms $name || return 1
                ;;
        *)
                # unknown, will be loaded only if no known drivers were found
                return 2
                ;;
        esac
        return 0
}

# Return success if there is no new pending DKMS build (needed to disallow
# speedboot on very early boot).
# Previously failed build or a missing module is counted as no pending build.
# Note: no /usr
check_dkms_status() {
        [ -e /etc/alternatives/gl_conf ] || return 0
        # return fast for non-DKMS
        check_gl /etc/ld.so.conf.d/GL/standard.conf && return 0

        local active="$(ls -l /etc/alternatives/gl_conf | awk '{ print $NF }')"

        local modname=

        case $active in
        /etc/nvidia*/ld.so.conf)
                modname="nvidia${active#*nvidia}"
                modname="${modname%/*}"
                ;;
        /etc/ld.so.conf.d/GL/ati.conf)
                modname="fglrx"
                ;;
        *)
                # Unknown DKMS-looking driver,
                # allow speedboot.
                return 0
                ;;
        esac
        check_dkms "$modname" 1
}

# Check if all loaded kernel modules have correct xorg.conf
check_loaded() {
        for module in $(grep -oE "^($KNOWN_MODULES) " /proc/modules); do
                # try to unload the driver in case it is not in use before bailing
                check_driver "$module" || rmmod "$module" &>/dev/null || return 1
        done
        return 0
}

# Check that specified DKMS driver is not queued for build for the current
# kernel. Used to check if we 1) should disable speedboot for this boot
# (--check-dkms-status), and 2) if should should load the currently
# existing driver (--load). Doing otherwise might cause us to load a wrong old
# version of the driver that had been installed using e.g. binary DKMS
# packages.
# Note: no /usr
check_dkms() {
        local driver="$1"
        local force="$2"

        # If called from DKMS itself or we are not in rc.sysinit anymore,
        # there are no pending builds.
        if [ -z "$force" ]; then
                [ "$DKMS_AUTOLOAD_MODULE" = "$driver" ] && return 0
                [ -z "$STARTUP" ] && [ ! -f "/dev/.in_sysinit" ] && return 0
        fi

        local found=
        local uname_r="$(uname -r)"

        for dir in /var/lib/dkms/$driver/*; do
                [ -e "$dir" ] || return 0 # no module, no build; or no /var
                [ -L "$dir" ] && continue # not a module version
                found=1 # module version found
                [ -e "$dir/$uname_r" ] && return 0
                [ -e "/var/lib/dkms-binary/$driver/$(basename "$dir")/$uname_r" ] && return 0

                if [ -e "$dir/build/make.log" ]; then
                        # Build has failed for some kernel, check if it is this one.
                        # If so, there is no point in returning 1.
                        grep -q "^DKMS make\.log.* $uname_r " && return 0
                fi
        done

        # if module versions were found but none were built for this kernel, return 1
        [ -n "$found" ] && return 1 || return 0
}

# Note: no /usr
check_gl() {
        local alt_inode="$(stat -L -c%i $1 2>/dev/null)"
        [ -n "$alt_inode" ] || return 1
        [ -n "$GL_INODE" ] || GL_INODE="$(stat -L -c%i /etc/alternatives/gl_conf 2>/dev/null)"
        [ "$alt_inode" = "$GL_INODE" ] || return 1
        return 0
}

# Note: no /usr
get_xorg_drivers() {
        if [ -z "$XORG_DRIVERS" ]; then
                XORG_DRIVERS="$(cat /etc/X11/xorg.conf /etc/X11/xorg.conf.d/*.conf 2>/dev/null |
                        awk -F'"' -vORS=' ' -vIGNORECASE=1 '
                        /^[[:space:]]+*section[[:space:]]+"device"/     { device=1 }
                        /endsection/                                    { device=0 }
                        /^[[:space:]]*driver[[:space:]]*".*"/           { if (device) drivers[$2]=$2 }
                        END                                             { for (driver in drivers) print driver }
                        ')"
                [ -n "$XORG_DRIVERS" ] || XORG_DRIVERS="-"
        fi
}

# Note: no /usr
# parameter 1: xorg driver
# parameter 2: 1 the check if the driver is explicitely enabled
#              0 means that check only for conflicts
check_xorg() {
        local driver="$1"
        local explicit_only="$2"

        eval local xorg_drivers=\"\$XORG_$driver\"
        [ -n "$xorg_drivers" ] || xorg_drivers="$driver"
        eval local conflicts=\"\$CONFLICTS_$driver\"

        get_xorg_drivers

        conflict_found=
        for enabled_driver in $XORG_DRIVERS; do
                for xorg_driver in $xorg_drivers; do
                        [ "$enabled_driver" = "$xorg_driver" ] && return 0
                done

                # if the X.org driver can be loaded implicitely, check that
                # there are no conflicting drivers that override the driver
                if [ "$explicit_only" = "0" -a -z "$conflict_found" ]; then
                        for conflict in vesa $conflicts; do
                                if [ "$enabled_driver" = "$conflict" ]; then
                                       conflict_found=1
                                       continue 2
                                       # continue loop to check for an explicit load
                                fi
                        done
                fi
        done

        # in case of a conflict, do not load the module
        [ -n "$conflict_found" ] && return 1

        # no driver is selected - don't load if explicit_only is 1
        [ "$explicit_only" = "1" ] && return 1

        # implicit load allowed; still don't load if no xorg.conf (i.e. live cd)
        [ -e "/etc/X11/xorg.conf" ]
}

# Load the driver for the specified modalias, if configured.
# Note: no /usr
load_driver() {
        local modulename
        local load_default=1

        # NOTE: UPDATE when module-init-tools is upgraded to get better performance
        # modprobe has -R option:
        #for modulename in $(/home/anssi/module-init-tools-3.12/build/modprobe -Rq "$1"); do
        # modprobe does not have -R option:
        for mod in $(/sbin/modprobe -biqvn "$1"); do
                [ "$mod" = "insmod" ] && continue
                modulename="${mod##*/}"
                modulename="${modulename%%.*}"

                check_driver "$modulename"
                case $? in
                1)      # a driver which needs handling by this script matches
                        # the modalias, but was not configured - do not run
                        # the generic modprobe if no other drivers are
                        # configured either
                        load_default=
                        continue
                        ;;
                2)      continue
                        ;;
                esac

                if [ -n "$IS_KMS" ]; then
                        grep -q "^$modulename " /proc/modules && return 0
                        echo "$modulename" > /dev/.late_kms 2>/dev/null
                        # If NEEDS_LOAD_NOW is not set and plymouth is running,
                        # skip loading the driver to avoid quitting plymouth.
                        # The driver will be loaded later by X server itself.
                        [ -z "$NEEDS_LOAD_NOW" ] && /bin/plymouth --ping 2>/dev/null && return 0
                        /bin/plymouth quit 2>/dev/null
                fi
                /sbin/modprobe -b "$modulename" && return 0
        done

        # no specially handled modules were loaded, so load all modules normally
        # unless $load_default was set above
        [ -z "$load_default" ] || /sbin/modprobe -b "$1"
}

is_kms_allowed() {
        for driver in $KMS_DRIVERS; do
                # Check all drivers for conflicts only.
                check_xorg $driver 0 || return 1
        done
        return 0
}

get_initrd_kms_drivers() {
        local initrd="$1"

        local kms_drivers="$(echo "$KMS_DRIVERS" | tr " " "|")"
        zcat "$initrd" | cpio -t --quiet | sed -nr "s,.*/($kms_drivers)\.ko.*$,\1,p"
}

# Check that the initrd doesn't contain disabled modules
check_initrd() {
        local initrd="$1"
        local initrd_drivers="$(get_initrd_kms_drivers "$initrd")"
        for driver in $initrd_drivers; do
                check_driver "$driver" || return 1
        done
        for driver2 in $(get_active_kms_drivers); do
                for driver in $initrd_drivers; do
                        [ "$driver" = "$driver2" ] && continue 2
                done
                # An enabled module for present hardware was not in initrd
                return 1
        done
        return 0
}

get_active_kms_drivers() {
        local kms_drivers=
        for device in $(grep -l 0x03 /sys/bus/pci/devices/0000\:0*/class); do
                [ -e "$device" ] || continue
                device="$(dirname $device)"
                [ -f "$device/modalias" ] || continue
                modalias="$(cat "$device/modalias")"
                for mod in $(/sbin/modprobe --first-time -biqvn "$modalias" 2>&1); do
                        modulename="${mod##*/}"
                        modulename="${modulename%%.*}"
                        IS_KMS=
                        check_driver "$modulename" || continue
                        [ -n "$IS_KMS" ] && echo $modulename
                done
        done
}

usage() {
        cat <<EOF
Usage: $0 action [arguments]

Known actions:

  --load MODALIAS
        Load drivers matching MODALIAS, checking that they are enabled and
        configured.

  --load-dkms-autoload MODNAME MODALIAS
        Same as --load, but assume MODNAME is built and correct so that
        checking dkms status is unnecessary.

  --is-disabled MODNAME
        Checks whether the driver corresponding to MODNAME is disabled (e.g.
        a conflicting driver is configured, etc.). Unknown MODNAMEs are
        considered not disabled.

  --is-enabled-kms MODNAME
        Checks whether the driver corresponding to MODNAME is enabled and
        MODNAME is a known KMS module. Note that drivers may be enabled even
        if there is no such hardware. This just checks that there are
        no conflicting drivers in use etc.

  --is-kms-allowed
        Checks whether it is ok to load KMS drivers in initrd. This returns
        a failure when a conflicting driver is set up (vesa or a proprietary
        one).

  --get-all-kms-drivers
        Get a list of the known KMS drivers.

  --get-active-kms-drivers
        Get a list of the known KMS drivers which are enabled and the hardware
        is present.

  --get-initrd-kms-drivers INITRD
        Get a list of the known KMS drivers in initrd INITRD.

  --check-dkms-status
        Checks if there are no pending DKMS builds for the currently enabled
        drivers.

  --check-loaded
        Checks that there are no disabled drivers loaded.

  --check-speedboot
        Does --check-dkms-status and --check-loaded.

  --check-loaded-strict
        As --check-loaded, and consider ambigious cases (e.g. nvidia where
        we can't detect if the loaded driver has the correct version) as
        failure.

  --check-initrd INITRD
        Check that INITRD doesn't contain disabled KMS drivers.
EOF
}

# clear global variables

# cache for check_gl()
GL_INODE=

# cache for check_xorg()
XORG_DRIVERS=

# The driver is a KMS enabled driver. This will cause the script to quit
# plymouth when a driver is loaded by --load and NEEDS_LOAD_NOW below is set.
# This is done as plymouth is still attached to the default framebuffer (the
# issues caused by not doing this don't seem to be fatal, though, but the
# display may be lost completely until plymouth eventually stops).
# There is no option in plymouth to "reload" a driver, it expects any KMS
# driver to be loaded be before starting it.
IS_KMS=

# This KMS driver needs to be loaded before X server starts, so load it now
# even if we have to shut down plymouth (see above).
NEEDS_LOAD_NOW=

# dkms module that was built when calling from DKMS
DKMS_AUTOLOAD_MODULE=

# Set by check_loaded() when it can't be sure that the correct driver is loaded
# (e.g. in case of the multiple proprietary nvidia drivers which all identify as
# "nvidia" in loaded modules list).
UNSURE=

case "$1" in
--load)
        load_driver "$2"
        ;;
--load-dkms-autoload)
        DKMS_AUTOLOAD_MODULE="$2"
        load_driver "$3"
        ;;
--is-disabled)
        check_driver "$2"
        [ $? -eq 1 ]
        # unknown (2) are not considered disabled :)
        ;;
--is-enabled-kms)
        check_driver "$2" && [ -n "$IS_KMS" ]
        ;;
--is-kms-allowed)
        is_kms_allowed
        ;;
--check-dkms-status)
        check_dkms_status
        ;;
--get-all-kms-drivers)
        echo $KMS_DRIVERS
        ;;
--get-active-kms-drivers)
        get_active_kms_drivers
        ;;
--get-initrd-kms-drivers)
        get_initrd_kms_drivers "$2"
        ;;
--check-initrd)
        check_initrd "$2"
        ;;
--check-loaded)
        check_loaded
        ;;
--check-loaded-strict)
        check_loaded && [ -z "$UNSURE" ]
        ;;
--check-speedboot)
        check_dkms_status && check_loaded
        ;;
*)
        usage
        ;;
esac
1	anssi	912	#!/bin/sh
2			#
3			# Display driver helper
4			#
5			# Copyright (c) 2010, 2011 Anssi Hannula <anssi.hannula@iki.fi>
6			#
7			# - Load drivers for specified modaliases, skipping disabled display drivers
8			# that would cause conflicts (KMS vs. vesa, KMS vs. proprietary).
9			# - Get information about enabled driver modules
10			# - Check that the loaded modules are correct
11			#
12			# Licensed under terms of GPLv2 or later.
13			#
14			# When updating, check:
15			# - the variables below
16			# - check_driver function
17			# - check_dkms_status function
18			#
19
20	anssi	958	if [ -n "$DEBUG_DISPLAY_DRIVER_HELPER" ]; then
21			echo "$(date) $*" >> /dev/ddh_debug
22			exec 2>>/dev/ddh_debug
23			set -x
24			fi
25	anssi	912
26			export LC_ALL=C
27
28			KMS_DRIVERS="i915 radeon nouveau"
29			# module names at run-time (hence nvidia instead of nvidia*):
30			KNOWN_MODULES="i915\|radeon\|nouveau\|fglrx\|nvidia"
31
32			XORG_i915="intel"
33			CONFLICTS_i915=""
34
35			XORG_nouveau="nouveau"
36			CONFLICTS_nouveau="nv nvidia"
37
38			XORG_radeon="ati radeon"
39			CONFLICTS_radeon="fglrx"
40
41			# Note: no /usr
42			# See end of script for descriptions of global variables.
43			check_driver() {
44			local name="$1"
45			case "$name" in
46			i915)
47			# implicitely loaded by X.org
48			check_xorg $name 0 \|\| return 1
49			IS_KMS=1
50			;;
51			radeon)
52			# implicitely loaded by X.org
53			check_xorg $name 0 \|\| return 1
54	anssi	997	# Do not load if the proprietary driver is temporarily disabled
55			# on a PowerXpress system.
56			# TODO: this check could be omitted if radeon was explicitely
57			# specified in xorg.conf - but that is only known by check_xorg.
58			check_gl /etc/fglrx/pxpress-free.ld.so.conf && return 1
59	anssi	912	IS_KMS=1
60			# radeon needs to loaded before X server
61			NEEDS_LOAD_NOW=1
62			;;
63			nouveau)
64			# these KMS drivers require an explicit directive in xorg.conf
65			check_xorg $name 1 \|\| return 1
66			IS_KMS=1
67			;;
68			fglrx)
69			check_xorg fglrx 1 \|\| return 1
70			check_dkms fglrx \|\| return 1
71			;;
72			nvidia)
73			# manually installed driver or a call from check_loaded()
74			UNSURE=1
75			check_xorg nvidia 1 \|\| return 1
76			;;
77			nvidiafb)
78			# this is only reached if nvidiafb is manually unblacklisted
79			return 2
80			;;
81			nvidia*)
82			[ "$name" = "nvidia_current" ] && name=nvidia-current
83			# there are multiple co-installable driver versions, so check
84			# the active alternative as well
85			check_gl /etc/$name/ld.so.conf \|\| return 1
86			check_xorg nvidia 1 \|\| return 1
87			check_dkms $name \|\| return 1
88			;;
89			*)
90			# unknown, will be loaded only if no known drivers were found
91			return 2
92			;;
93			esac
94			return 0
95			}
96
97			# Return success if there is no new pending DKMS build (needed to disallow
98			# speedboot on very early boot).
99			# Previously failed build or a missing module is counted as no pending build.
100			# Note: no /usr
101			check_dkms_status() {
102			[ -e /etc/alternatives/gl_conf ] \|\| return 0
103			# return fast for non-DKMS
104			check_gl /etc/ld.so.conf.d/GL/standard.conf && return 0
105
106			local active="$(ls -l /etc/alternatives/gl_conf \| awk '{ print $NF }')"
107
108			local modname=
109
110			case $active in
111			/etc/nvidia*/ld.so.conf)
112			modname="nvidia${active#*nvidia}"
113			modname="${modname%/*}"
114			;;
115			/etc/ld.so.conf.d/GL/ati.conf)
116			modname="fglrx"
117			;;
118			*)
119			# Unknown DKMS-looking driver,
120			# allow speedboot.
121			return 0
122			;;
123			esac
124			check_dkms "$modname" 1
125			}
126
127			# Check if all loaded kernel modules have correct xorg.conf
128			check_loaded() {
129			for module in $(grep -oE "^($KNOWN_MODULES) " /proc/modules); do
130	anssi	961	# try to unload the driver in case it is not in use before bailing
131			check_driver "$module" \|\| rmmod "$module" &>/dev/null \|\| return 1
132	anssi	912	done
133			return 0
134			}
135
136			# Check that specified DKMS driver is not queued for build for the current
137			# kernel. Used to check if we 1) should disable speedboot for this boot
138			# (--check-dkms-status), and 2) if should should load the currently
139			# existing driver (--load). Doing otherwise might cause us to load a wrong old
140			# version of the driver that had been installed using e.g. binary DKMS
141			# packages.
142			# Note: no /usr
143			check_dkms() {
144			local driver="$1"
145			local force="$2"
146
147			# If called from DKMS itself or we are not in rc.sysinit anymore,
148			# there are no pending builds.
149			if [ -z "$force" ]; then
150			[ "$DKMS_AUTOLOAD_MODULE" = "$driver" ] && return 0
151			[ -z "$STARTUP" ] && [ ! -f "/dev/.in_sysinit" ] && return 0
152			fi
153
154			local found=
155			local uname_r="$(uname -r)"
156
157			for dir in /var/lib/dkms/$driver/*; do
158			[ -e "$dir" ] \|\| return 0 # no module, no build; or no /var
159			[ -L "$dir" ] && continue # not a module version
160			found=1 # module version found
161			[ -e "$dir/$uname_r" ] && return 0
162			[ -e "/var/lib/dkms-binary/$driver/$(basename "$dir")/$uname_r" ] && return 0
163
164			if [ -e "$dir/build/make.log" ]; then
165			# Build has failed for some kernel, check if it is this one.
166			# If so, there is no point in returning 1.
167			grep -q "^DKMS make\.log.* $uname_r " && return 0
168			fi
169			done
170
171			# if module versions were found but none were built for this kernel, return 1
172			[ -n "$found" ] && return 1 \|\| return 0
173			}
174
175			# Note: no /usr
176			check_gl() {
177			local alt_inode="$(stat -L -c%i $1 2>/dev/null)"
178			[ -n "$alt_inode" ] \|\| return 1
179			[ -n "$GL_INODE" ] \|\| GL_INODE="$(stat -L -c%i /etc/alternatives/gl_conf 2>/dev/null)"
180			[ "$alt_inode" = "$GL_INODE" ] \|\| return 1
181			return 0
182			}
183
184			# Note: no /usr
185			get_xorg_drivers() {
186			if [ -z "$XORG_DRIVERS" ]; then
187			XORG_DRIVERS="$(cat /etc/X11/xorg.conf /etc/X11/xorg.conf.d/*.conf 2>/dev/null \|
188			awk -F'"' -vORS=' ' -vIGNORECASE=1 '
189			/^[[:space:]]+*section[[:space:]]+"device"/ { device=1 }
190			/endsection/ { device=0 }
191			/^[[:space:]]driver[[:space:]]".*"/ { if (device) drivers[$2]=$2 }
192			END { for (driver in drivers) print driver }
193			')"
194			[ -n "$XORG_DRIVERS" ] \|\| XORG_DRIVERS="-"
195			fi
196			}
197
198			# Note: no /usr
199			# parameter 1: xorg driver
200			# parameter 2: 1 the check if the driver is explicitely enabled
201			# 0 means that check only for conflicts
202			check_xorg() {
203			local driver="$1"
204			local explicit_only="$2"
205
206			eval local xorg_drivers=\"\$XORG_$driver\"
207	anssi	959	[ -n "$xorg_drivers" ] \|\| xorg_drivers="$driver"
208	anssi	912	eval local conflicts=\"\$CONFLICTS_$driver\"
209
210			get_xorg_drivers
211
212			conflict_found=
213			for enabled_driver in $XORG_DRIVERS; do
214			for xorg_driver in $xorg_drivers; do
215			[ "$enabled_driver" = "$xorg_driver" ] && return 0
216			done
217
218			# if the X.org driver can be loaded implicitely, check that
219			# there are no conflicting drivers that override the driver
220			if [ "$explicit_only" = "0" -a -z "$conflict_found" ]; then
221			for conflict in vesa $conflicts; do
222			if [ "$enabled_driver" = "$conflict" ]; then
223			conflict_found=1
224			continue 2
225			# continue loop to check for an explicit load
226			fi
227			done
228			fi
229			done
230
231			# in case of a conflict, do not load the module
232			[ -n "$conflict_found" ] && return 1
233
234			# no driver is selected - don't load if explicit_only is 1
235			[ "$explicit_only" = "1" ] && return 1
236
237			# implicit load allowed; still don't load if no xorg.conf (i.e. live cd)
238			[ -e "/etc/X11/xorg.conf" ]
239			}
240
241			# Load the driver for the specified modalias, if configured.
242			# Note: no /usr
243			load_driver() {
244			local modulename
245			local load_default=1
246
247			# NOTE: UPDATE when module-init-tools is upgraded to get better performance
248			# modprobe has -R option:
249			#for modulename in $(/home/anssi/module-init-tools-3.12/build/modprobe -Rq "$1"); do
250			# modprobe does not have -R option:
251			for mod in $(/sbin/modprobe -biqvn "$1"); do
252			[ "$mod" = "insmod" ] && continue
253			modulename="${mod##*/}"
254			modulename="${modulename%%.*}"
255
256			check_driver "$modulename"
257			case $? in
258			1) # a driver which needs handling by this script matches
259			# the modalias, but was not configured - do not run
260			# the generic modprobe if no other drivers are
261			# configured either
262			load_default=
263			continue
264			;;
265			2) continue
266			;;
267			esac
268
269			if [ -n "$IS_KMS" ]; then
270			grep -q "^$modulename " /proc/modules && return 0
271			echo "$modulename" > /dev/.late_kms 2>/dev/null
272			# If NEEDS_LOAD_NOW is not set and plymouth is running,
273			# skip loading the driver to avoid quitting plymouth.
274			# The driver will be loaded later by X server itself.
275			[ -z "$NEEDS_LOAD_NOW" ] && /bin/plymouth --ping 2>/dev/null && return 0
276			/bin/plymouth quit 2>/dev/null
277			fi
278			/sbin/modprobe -b "$modulename" && return 0
279			done
280
281			# no specially handled modules were loaded, so load all modules normally
282			# unless $load_default was set above
283			[ -z "$load_default" ] \|\| /sbin/modprobe -b "$1"
284			}
285
286			is_kms_allowed() {
287			for driver in $KMS_DRIVERS; do
288			# Check all drivers for conflicts only.
289			check_xorg $driver 0 \|\| return 1
290			done
291			return 0
292			}
293
294			get_initrd_kms_drivers() {
295			local initrd="$1"
296
297			local kms_drivers="$(echo "$KMS_DRIVERS" \| tr " " "\|")"
298			zcat "$initrd" \| cpio -t --quiet \| sed -nr "s,./($kms_drivers)\.ko.$,\1,p"
299			}
300
301			# Check that the initrd doesn't contain disabled modules
302			check_initrd() {
303			local initrd="$1"
304			local initrd_drivers="$(get_initrd_kms_drivers "$initrd")"
305			for driver in $initrd_drivers; do
306			check_driver "$driver" \|\| return 1
307			done
308			for driver2 in $(get_active_kms_drivers); do
309			for driver in $initrd_drivers; do
310			[ "$driver" = "$driver2" ] && continue 2
311			done
312			# An enabled module for present hardware was not in initrd
313			return 1
314			done
315			return 0
316			}
317
318			get_active_kms_drivers() {
319			local kms_drivers=
320			for device in $(grep -l 0x03 /sys/bus/pci/devices/0000\:0*/class); do
321			[ -e "$device" ] \|\| continue
322			device="$(dirname $device)"
323			[ -f "$device/modalias" ] \|\| continue
324			modalias="$(cat "$device/modalias")"
325			for mod in $(/sbin/modprobe --first-time -biqvn "$modalias" 2>&1); do
326			modulename="${mod##*/}"
327			modulename="${modulename%%.*}"
328			IS_KMS=
329			check_driver "$modulename" \|\| continue
330			[ -n "$IS_KMS" ] && echo $modulename
331			done
332			done
333			}
334
335			usage() {
336			cat <<EOF
337			Usage: $0 action [arguments]
338
339			Known actions:
340
341			--load MODALIAS
342			Load drivers matching MODALIAS, checking that they are enabled and
343			configured.
344
345			--load-dkms-autoload MODNAME MODALIAS
346			Same as --load, but assume MODNAME is built and correct so that
347			checking dkms status is unnecessary.
348
349			--is-disabled MODNAME
350			Checks whether the driver corresponding to MODNAME is disabled (e.g.
351			a conflicting driver is configured, etc.). Unknown MODNAMEs are
352			considered not disabled.
353
354			--is-enabled-kms MODNAME
355			Checks whether the driver corresponding to MODNAME is enabled and
356			MODNAME is a known KMS module. Note that drivers may be enabled even
357			if there is no such hardware. This just checks that there are
358			no conflicting drivers in use etc.
359
360			--is-kms-allowed
361			Checks whether it is ok to load KMS drivers in initrd. This returns
362			a failure when a conflicting driver is set up (vesa or a proprietary
363			one).
364
365			--get-all-kms-drivers
366			Get a list of the known KMS drivers.
367
368			--get-active-kms-drivers
369			Get a list of the known KMS drivers which are enabled and the hardware
370			is present.
371
372			--get-initrd-kms-drivers INITRD
373			Get a list of the known KMS drivers in initrd INITRD.
374
375			--check-dkms-status
376			Checks if there are no pending DKMS builds for the currently enabled
377			drivers.
378
379			--check-loaded
380			Checks that there are no disabled drivers loaded.
381
382			--check-speedboot
383			Does --check-dkms-status and --check-loaded.
384
385			--check-loaded-strict
386			As --check-loaded, and consider ambigious cases (e.g. nvidia where
387			we can't detect if the loaded driver has the correct version) as
388			failure.
389
390			--check-initrd INITRD
391			Check that INITRD doesn't contain disabled KMS drivers.
392			EOF
393			}
394
395			# clear global variables
396
397			# cache for check_gl()
398			GL_INODE=
399
400			# cache for check_xorg()
401			XORG_DRIVERS=
402
403			# The driver is a KMS enabled driver. This will cause the script to quit
404			# plymouth when a driver is loaded by --load and NEEDS_LOAD_NOW below is set.
405			# This is done as plymouth is still attached to the default framebuffer (the
406			# issues caused by not doing this don't seem to be fatal, though, but the
407			# display may be lost completely until plymouth eventually stops).
408			# There is no option in plymouth to "reload" a driver, it expects any KMS
409			# driver to be loaded be before starting it.
410			IS_KMS=
411
412			# This KMS driver needs to be loaded before X server starts, so load it now
413			# even if we have to shut down plymouth (see above).
414			NEEDS_LOAD_NOW=
415
416			# dkms module that was built when calling from DKMS
417			DKMS_AUTOLOAD_MODULE=
418
419			# Set by check_loaded() when it can't be sure that the correct driver is loaded
420			# (e.g. in case of the multiple proprietary nvidia drivers which all identify as
421			# "nvidia" in loaded modules list).
422			UNSURE=
423
424			case "$1" in
425			--load)
426			load_driver "$2"
427			;;
428			--load-dkms-autoload)
429			DKMS_AUTOLOAD_MODULE="$2"
430			load_driver "$3"
431			;;
432			--is-disabled)
433			check_driver "$2"
434			[ $? -eq 1 ]
435			# unknown (2) are not considered disabled :)
436			;;
437			--is-enabled-kms)
438			check_driver "$2" && [ -n "$IS_KMS" ]
439			;;
440			--is-kms-allowed)
441			is_kms_allowed
442			;;
443			--check-dkms-status)
444			check_dkms_status
445			;;
446			--get-all-kms-drivers)
447			echo $KMS_DRIVERS
448			;;
449			--get-active-kms-drivers)
450			get_active_kms_drivers
451			;;
452			--get-initrd-kms-drivers)
453			get_initrd_kms_drivers "$2"
454			;;
455			--check-initrd)
456			check_initrd "$2"
457			;;
458			--check-loaded)
459			check_loaded
460			;;
461			--check-loaded-strict)
462			check_loaded && [ -z "$UNSURE" ]
463			;;
464			--check-speedboot)
465			check_dkms_status && check_loaded
466			;;
467			*)
468			usage
469			;;
470			esac