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

#!/bin/sh
#
# Display driver helper
#
# Copyright (c) 2010, 2011, 2012 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
#
# Note that drivers not known by this script are handled normally, i.e.
# loaded automatically as udev normally would've.
#
# Licensed under terms of GPLv2 or later.
#
# When updating, check:
# - the variables below
# - check_driver function
# - check_dkms_status function
#

# DEBUG_DISPLAY_DRIVER_HELPER=yes

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"
        # modalias is optional, only needed to set MODOPTIONS for radeon
        # this should not be set when not intending to load the module
        local modalias="$2"

        MODOPTIONS=

        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 KMS needs to be loaded before X server
                NEEDS_LOAD_NOW=1

                # check if firmware is needed and present (random fw checked)
                if [ -n "$modalias" ] && [ ! -e "/lib/firmware/radeon/R700_rlc.bin" ]; then
                        # no firmware, lets check if it is needed
                        pciid="${modalias#pci:v00001002d0000}"
                        pciid="${pciid%sv*}"
                        case "$pciid" in
                        # All Radeons up to PALM (see radeon_probe.c)
                        31??|3E??|4???|5???|7???|68??|94??|95??|961?|971?|98??)
                                # The radeon driver reportedly has some issues
                                # when loaded without firmware - it doesn't fallback to noaccel
                                # nicely as it should, instead the framebuffer gets messed up.
                                # However, these cards are still supported by usermode modesetting,
                                # so just disable KMS. (Mageia bug #3466)
                                # TODO: actually fix the driver to not mess up framebuffer when no firmware
                                # is present and disable accel cleanly so that this workaround
                                # wouldn't be needed -Anssi
                                MODOPTIONS="$MODOPTIONS modeset=0"
                                IS_KMS=
                                # needs to be loaded now in order to set the module option
                                NEEDS_LOAD_NOW=1
                                ;;
                        ????)
                                # Cards newer than PALM don't support UMS, so don't load the driver
                                # at all (it might still get done by X server, though).
                                return 1
                                ;;
                        *)
                                # Modalias parse error, strange. Load normally...
                                ;;
                        esac
                fi
                ;;
        nouveau)
                # implicitely loaded by X.org
                check_xorg $name 0 || return 1
                IS_KMS=1
                ;;
        fglrx)
                check_xorg fglrx 1 || return 1
                check_dkms fglrx || return 1
                ;;
        nvidia)
                # manually installed driver or a call from check_loaded()
                UNSURE=1
                check_xorg nvidia 1 || return 1
                ;;
        nvidiafb)
                # this is only reached if nvidiafb is manually unblacklisted
                return 2
                ;;
        nvidia*)
                [ "$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: KMS module or xorg driver
# parameter 2: 1 - check if the driver is explicitely enabled
#              0 - 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; only load if there is evidence that this is
        # not a live cd or similar with automatic configuration occurring later
        # in the boot process (which might configure a driver conflicting with
        # the implicit driver, e.g. a proprietary one)
        # TODO: Could this be replaced with a more robust check?
        [ -e "/etc/X11/xorg.conf" ] || [ -e "/etc/sysconfig/harddrake2/kernels" ] ||
                [ -e "/etc/sysconfig/harddrake2/xorg" ] || [ -e "/boot/grub/menu.lst" ]
}

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

        for modulename in $(/sbin/modprobe -Rq "$modalias"); do
                check_driver "$modulename" "$modalias"
                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" $MODOPTIONS && 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 "$modalias"
}

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"
}

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 modulename in $(/sbin/modprobe -Rq "$modalias"); do
                        IS_KMS=
                        check_driver "$modulename" "$modalias" || 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 ambiguous cases (e.g. nvidia where
        we can't detect if the loaded driver has the correct version) as
        failure.
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=

# Extra module options - used to disable radeon modesetting when no firmware
# is present and it is needed.
MODOPTIONS=

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 "$2"
        ;;
--check-loaded)
        check_loaded
        ;;
--check-loaded-strict)
        check_loaded && [ -z "$UNSURE" ]
        ;;
--check-speedboot)
        check_dkms_status && check_loaded
        ;;
*)
        usage
        ;;
esac
1	#!/bin/sh
2	#
3	# Display driver helper
4	#
5	# Copyright (c) 2010, 2011, 2012 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	# Note that drivers not known by this script are handled normally, i.e.
13	# loaded automatically as udev normally would've.
14	#
15	# Licensed under terms of GPLv2 or later.
16	#
17	# When updating, check:
18	# - the variables below
19	# - check_driver function
20	# - check_dkms_status function
21	#
22
23	# DEBUG_DISPLAY_DRIVER_HELPER=yes
24
25	if [ -n "$DEBUG_DISPLAY_DRIVER_HELPER" ]; then
26	echo "$(date) $*" >> /dev/ddh_debug
27	exec 2>>/dev/ddh_debug
28	set -x
29	fi
30
31	export LC_ALL=C
32
33	KMS_DRIVERS="i915 radeon nouveau"
34	# module names at run-time (hence nvidia instead of nvidia*):
35	KNOWN_MODULES="i915\|radeon\|nouveau\|fglrx\|nvidia"
36
37	XORG_i915="intel"
38	CONFLICTS_i915=""
39
40	XORG_nouveau="nouveau"
41	CONFLICTS_nouveau="nv nvidia"
42
43	XORG_radeon="ati radeon"
44	CONFLICTS_radeon="fglrx"
45
46	# Note: no /usr
47	# See end of script for descriptions of global variables.
48	check_driver() {
49	local name="$1"
50	# modalias is optional, only needed to set MODOPTIONS for radeon
51	# this should not be set when not intending to load the module
52	local modalias="$2"
53
54	MODOPTIONS=
55
56	case "$name" in
57	i915)
58	# implicitely loaded by X.org
59	check_xorg $name 0 \|\| return 1
60	IS_KMS=1
61	;;
62	radeon)
63	# implicitely loaded by X.org
64	check_xorg $name 0 \|\| return 1
65	# Do not load if the proprietary driver is temporarily disabled
66	# on a PowerXpress system.
67	# TODO: this check could be omitted if radeon was explicitely
68	# specified in xorg.conf - but that is only known by check_xorg.
69	check_gl /etc/fglrx/pxpress-free.ld.so.conf && return 1
70
71	IS_KMS=1
72	# radeon KMS needs to be loaded before X server
73	NEEDS_LOAD_NOW=1
74
75	# check if firmware is needed and present (random fw checked)
76	if [ -n "$modalias" ] && [ ! -e "/lib/firmware/radeon/R700_rlc.bin" ]; then
77	# no firmware, lets check if it is needed
78	pciid="${modalias#pci:v00001002d0000}"
79	pciid="${pciid%sv*}"
80	case "$pciid" in
81	# All Radeons up to PALM (see radeon_probe.c)
82	31??\|3E??\|4???\|5???\|7???\|68??\|94??\|95??\|961?\|971?\|98??)
83	# The radeon driver reportedly has some issues
84	# when loaded without firmware - it doesn't fallback to noaccel
85	# nicely as it should, instead the framebuffer gets messed up.
86	# However, these cards are still supported by usermode modesetting,
87	# so just disable KMS. (Mageia bug #3466)
88	# TODO: actually fix the driver to not mess up framebuffer when no firmware
89	# is present and disable accel cleanly so that this workaround
90	# wouldn't be needed -Anssi
91	MODOPTIONS="$MODOPTIONS modeset=0"
92	IS_KMS=
93	# needs to be loaded now in order to set the module option
94	NEEDS_LOAD_NOW=1
95	;;
96	????)
97	# Cards newer than PALM don't support UMS, so don't load the driver
98	# at all (it might still get done by X server, though).
99	return 1
100	;;
101	*)
102	# Modalias parse error, strange. Load normally...
103	;;
104	esac
105	fi
106	;;
107	nouveau)
108	# implicitely loaded by X.org
109	check_xorg $name 0 \|\| return 1
110	IS_KMS=1
111	;;
112	fglrx)
113	check_xorg fglrx 1 \|\| return 1
114	check_dkms fglrx \|\| return 1
115	;;
116	nvidia)
117	# manually installed driver or a call from check_loaded()
118	UNSURE=1
119	check_xorg nvidia 1 \|\| return 1
120	;;
121	nvidiafb)
122	# this is only reached if nvidiafb is manually unblacklisted
123	return 2
124	;;
125	nvidia*)
126	[ "$name" = "nvidia_current" ] && name=nvidia-current
127	# there are multiple co-installable driver versions, so check
128	# the active alternative as well
129	check_gl /etc/$name/ld.so.conf \|\| return 1
130	check_xorg nvidia 1 \|\| return 1
131	check_dkms $name \|\| return 1
132	;;
133	*)
134	# unknown, will be loaded only if no known drivers were found
135	return 2
136	;;
137	esac
138	return 0
139	}
140
141	# Return success if there is no new pending DKMS build (needed to disallow
142	# speedboot on very early boot).
143	# Previously failed build or a missing module is counted as no pending build.
144	# Note: no /usr
145	check_dkms_status() {
146	[ -e /etc/alternatives/gl_conf ] \|\| return 0
147	# return fast for non-DKMS
148	check_gl /etc/ld.so.conf.d/GL/standard.conf && return 0
149
150	local active="$(ls -l /etc/alternatives/gl_conf \| awk '{ print $NF }')"
151
152	local modname=
153
154	case $active in
155	/etc/nvidia*/ld.so.conf)
156	modname="nvidia${active#*nvidia}"
157	modname="${modname%/*}"
158	;;
159	/etc/ld.so.conf.d/GL/ati.conf)
160	modname="fglrx"
161	;;
162	*)
163	# Unknown DKMS-looking driver,
164	# allow speedboot.
165	return 0
166	;;
167	esac
168	check_dkms "$modname" 1
169	}
170
171	# Check if all loaded kernel modules have correct xorg.conf
172	check_loaded() {
173	for module in $(grep -oE "^($KNOWN_MODULES) " /proc/modules); do
174	# try to unload the driver in case it is not in use before bailing
175	check_driver "$module" \|\| rmmod "$module" &>/dev/null \|\| return 1
176	done
177	return 0
178	}
179
180	# Check that specified DKMS driver is not queued for build for the current
181	# kernel. Used to check if we 1) should disable speedboot for this boot
182	# (--check-dkms-status), and 2) if should should load the currently
183	# existing driver (--load). Doing otherwise might cause us to load a wrong old
184	# version of the driver that had been installed using e.g. binary DKMS
185	# packages.
186	# Note: no /usr
187	check_dkms() {
188	local driver="$1"
189	local force="$2"
190
191	# If called from DKMS itself or we are not in rc.sysinit anymore,
192	# there are no pending builds.
193	if [ -z "$force" ]; then
194	[ "$DKMS_AUTOLOAD_MODULE" = "$driver" ] && return 0
195	[ -z "$STARTUP" ] && [ ! -f "/dev/.in_sysinit" ] && return 0
196	fi
197
198	local found=
199	local uname_r="$(uname -r)"
200
201	for dir in /var/lib/dkms/$driver/*; do
202	[ -e "$dir" ] \|\| return 0 # no module, no build; or no /var
203	[ -L "$dir" ] && continue # not a module version
204	found=1 # module version found
205	[ -e "$dir/$uname_r" ] && return 0
206	[ -e "/var/lib/dkms-binary/$driver/$(basename "$dir")/$uname_r" ] && return 0
207
208	if [ -e "$dir/build/make.log" ]; then
209	# Build has failed for some kernel, check if it is this one.
210	# If so, there is no point in returning 1.
211	grep -q "^DKMS make\.log.* $uname_r " && return 0
212	fi
213	done
214
215	# if module versions were found but none were built for this kernel, return 1
216	[ -n "$found" ] && return 1 \|\| return 0
217	}
218
219	# Note: no /usr
220	check_gl() {
221	local alt_inode="$(stat -L -c%i $1 2>/dev/null)"
222	[ -n "$alt_inode" ] \|\| return 1
223	[ -n "$GL_INODE" ] \|\| GL_INODE="$(stat -L -c%i /etc/alternatives/gl_conf 2>/dev/null)"
224	[ "$alt_inode" = "$GL_INODE" ] \|\| return 1
225	return 0
226	}
227
228	# Note: no /usr
229	get_xorg_drivers() {
230	if [ -z "$XORG_DRIVERS" ]; then
231	XORG_DRIVERS="$(cat /etc/X11/xorg.conf /etc/X11/xorg.conf.d/*.conf 2>/dev/null \|
232	awk -F'"' -vORS=' ' -vIGNORECASE=1 '
233	/^[[:space:]]+*section[[:space:]]+"device"/ { device=1 }
234	/endsection/ { device=0 }
235	/^[[:space:]]driver[[:space:]]".*"/ { if (device) drivers[$2]=$2 }
236	END { for (driver in drivers) print driver }
237	')"
238	[ -n "$XORG_DRIVERS" ] \|\| XORG_DRIVERS="-"
239	fi
240	}
241
242	# Note: no /usr
243	# parameter 1: KMS module or xorg driver
244	# parameter 2: 1 - check if the driver is explicitely enabled
245	# 0 - check only for conflicts
246	check_xorg() {
247	local driver="$1"
248	local explicit_only="$2"
249
250	eval local xorg_drivers=\"\$XORG_$driver\"
251	[ -n "$xorg_drivers" ] \|\| xorg_drivers="$driver"
252	eval local conflicts=\"\$CONFLICTS_$driver\"
253
254	get_xorg_drivers
255
256	conflict_found=
257	for enabled_driver in $XORG_DRIVERS; do
258	for xorg_driver in $xorg_drivers; do
259	[ "$enabled_driver" = "$xorg_driver" ] && return 0
260	done
261
262	# if the X.org driver can be loaded implicitely, check that
263	# there are no conflicting drivers that override the driver
264	if [ "$explicit_only" = "0" -a -z "$conflict_found" ]; then
265	for conflict in vesa $conflicts; do
266	if [ "$enabled_driver" = "$conflict" ]; then
267	conflict_found=1
268	continue 2
269	# continue loop to check for an explicit load
270	fi
271	done
272	fi
273	done
274
275	# in case of a conflict, do not load the module
276	[ -n "$conflict_found" ] && return 1
277
278	# no driver is selected - don't load if explicit_only is 1
279	[ "$explicit_only" = "1" ] && return 1
280
281	# implicit load allowed; only load if there is evidence that this is
282	# not a live cd or similar with automatic configuration occurring later
283	# in the boot process (which might configure a driver conflicting with
284	# the implicit driver, e.g. a proprietary one)
285	# TODO: Could this be replaced with a more robust check?
286	[ -e "/etc/X11/xorg.conf" ] \|\| [ -e "/etc/sysconfig/harddrake2/kernels" ] \|\|
287	[ -e "/etc/sysconfig/harddrake2/xorg" ] \|\| [ -e "/boot/grub/menu.lst" ]
288	}
289
290	# Load the driver for the specified modalias, if configured.
291	# Note: no /usr
292	load_driver() {
293	local modalias="$1"
294	local modulename
295	local load_default=1
296
297	for modulename in $(/sbin/modprobe -Rq "$modalias"); do
298	check_driver "$modulename" "$modalias"
299	case $? in
300	1) # a driver which needs handling by this script matches
301	# the modalias, but was not configured - do not run
302	# the generic modprobe if no other drivers are
303	# configured either
304	load_default=
305	continue
306	;;
307	2) continue
308	;;
309	esac
310
311	if [ -n "$IS_KMS" ]; then
312	grep -q "^$modulename " /proc/modules && return 0
313	echo "$modulename" > /dev/.late_kms 2>/dev/null
314	# If NEEDS_LOAD_NOW is not set and plymouth is running,
315	# skip loading the driver to avoid quitting plymouth.
316	# The driver will be loaded later by X server itself.
317	[ -z "$NEEDS_LOAD_NOW" ] && /bin/plymouth --ping 2>/dev/null && return 0
318	/bin/plymouth quit 2>/dev/null
319	fi
320	/sbin/modprobe -b "$modulename" $MODOPTIONS && return 0
321	done
322
323	# no specially handled modules were loaded, so load all modules normally
324	# unless $load_default was set above
325	[ -z "$load_default" ] \|\| /sbin/modprobe -b "$modalias"
326	}
327
328	is_kms_allowed() {
329	for driver in $KMS_DRIVERS; do
330	# Check all drivers for conflicts only.
331	check_xorg $driver 0 \|\| return 1
332	done
333	return 0
334	}
335
336	get_initrd_kms_drivers() {
337	local initrd="$1"
338
339	local kms_drivers="$(echo "$KMS_DRIVERS" \| tr " " "\|")"
340	zcat "$initrd" \| cpio -t --quiet \| sed -nr "s,./($kms_drivers)\.ko.$,\1,p"
341	}
342
343	get_active_kms_drivers() {
344	local kms_drivers=
345	for device in $(grep -l 0x03 /sys/bus/pci/devices/0000\:0*/class); do
346	[ -e "$device" ] \|\| continue
347	device="$(dirname $device)"
348	[ -f "$device/modalias" ] \|\| continue
349	modalias="$(cat "$device/modalias")"
350	for modulename in $(/sbin/modprobe -Rq "$modalias"); do
351	IS_KMS=
352	check_driver "$modulename" "$modalias" \|\| continue
353	[ -n "$IS_KMS" ] && echo $modulename
354	done
355	done
356	}
357
358	usage() {
359	cat <<EOF
360	Usage: $0 action [arguments]
361
362	Known actions:
363
364	--load MODALIAS
365	Load drivers matching MODALIAS, checking that they are enabled and
366	configured.
367
368	--load-dkms-autoload MODNAME MODALIAS
369	Same as --load, but assume MODNAME is built and correct so that
370	checking dkms status is unnecessary.
371
372	--is-disabled MODNAME
373	Checks whether the driver corresponding to MODNAME is disabled (e.g.
374	a conflicting driver is configured, etc.). Unknown MODNAMEs are
375	considered not disabled.
376
377	--is-enabled-kms MODNAME
378	Checks whether the driver corresponding to MODNAME is enabled and
379	MODNAME is a known KMS module. Note that drivers may be enabled even
380	if there is no such hardware. This just checks that there are
381	no conflicting drivers in use etc.
382
383	--is-kms-allowed
384	Checks whether it is ok to load KMS drivers in initrd. This returns
385	a failure when a conflicting driver is set up (vesa or a proprietary
386	one).
387
388	--get-all-kms-drivers
389	Get a list of the known KMS drivers.
390
391	--get-active-kms-drivers
392	Get a list of the known KMS drivers which are enabled and the hardware
393	is present.
394
395	--get-initrd-kms-drivers INITRD
396	Get a list of the known KMS drivers in initrd INITRD.
397
398	--check-dkms-status
399	Checks if there are no pending DKMS builds for the currently enabled
400	drivers.
401
402	--check-loaded
403	Checks that there are no disabled drivers loaded.
404
405	--check-speedboot
406	Does --check-dkms-status and --check-loaded.
407
408	--check-loaded-strict
409	As --check-loaded, and consider ambiguous cases (e.g. nvidia where
410	we can't detect if the loaded driver has the correct version) as
411	failure.
412	EOF
413	}
414
415	# clear global variables
416
417	# cache for check_gl()
418	GL_INODE=
419
420	# cache for check_xorg()
421	XORG_DRIVERS=
422
423	# The driver is a KMS enabled driver. This will cause the script to quit
424	# plymouth when a driver is loaded by --load and NEEDS_LOAD_NOW below is set.
425	# This is done as plymouth is still attached to the default framebuffer (the
426	# issues caused by not doing this don't seem to be fatal, though, but the
427	# display may be lost completely until plymouth eventually stops).
428	# There is no option in plymouth to "reload" a driver, it expects any KMS
429	# driver to be loaded be before starting it.
430	IS_KMS=
431
432	# This KMS driver needs to be loaded before X server starts, so load it now
433	# even if we have to shut down plymouth (see above).
434	NEEDS_LOAD_NOW=
435
436	# dkms module that was built when calling from DKMS
437	DKMS_AUTOLOAD_MODULE=
438
439	# Set by check_loaded() when it can't be sure that the correct driver is loaded
440	# (e.g. in case of the multiple proprietary nvidia drivers which all identify as
441	# "nvidia" in loaded modules list).
442	UNSURE=
443
444	# Extra module options - used to disable radeon modesetting when no firmware
445	# is present and it is needed.
446	MODOPTIONS=
447
448	case "$1" in
449	--load)
450	load_driver "$2"
451	;;
452	--load-dkms-autoload)
453	DKMS_AUTOLOAD_MODULE="$2"
454	load_driver "$3"
455	;;
456	--is-disabled)
457	check_driver "$2"
458	[ $? -eq 1 ]
459	# unknown (2) are not considered disabled :)
460	;;
461	--is-enabled-kms)
462	check_driver "$2" && [ -n "$IS_KMS" ]
463	;;
464	--is-kms-allowed)
465	is_kms_allowed
466	;;
467	--check-dkms-status)
468	check_dkms_status
469	;;
470	--get-all-kms-drivers)
471	echo $KMS_DRIVERS
472	;;
473	--get-active-kms-drivers)
474	get_active_kms_drivers
475	;;
476	--get-initrd-kms-drivers)
477	get_initrd_kms_drivers "$2"
478	;;
479	--check-loaded)
480	check_loaded
481	;;
482	--check-loaded-strict)
483	check_loaded && [ -z "$UNSURE" ]
484	;;
485	--check-speedboot)
486	check_dkms_status && check_loaded
487	;;
488	*)
489	usage
490	;;
491	esac