COMPILE BUG: SiS DRM Support

COMPILE BUG: SiS DRM Support

[Brett Nuske]

Hi,

   I have been trying to compile SiS DRM support
with the 2.4.18 kernel (have tried both module
and in the kernel) but to no avail. When built
as a module it compiles but when the module gets
loaded I get unresolved symbols.

   When trying to compile the support directly into
the kernel I get the following compilation errors:

<cut>

ld -m elf_i386 -T /usr/src/linux/arch/i386/vmlinux.lds -e stext arch/i386/kernel/head.o arch/i386/kernel/init_task.o init/main.o init/version.o \
        --start-group \
        arch/i386/kernel/kernel.o arch/i386/mm/mm.o kernel/kernel.o mm/mm.o fs/fs.o ipc/ipc.o \
         drivers/char/char.o drivers/block/block.o drivers/misc/misc.o drivers/net/net.o drivers/media/media.o drivers/char/agp/agp.o drivers/char/drm/drm.o drivers/ide/idedriver.o drivers/cdrom/driver.o drivers/sound/sounddrivers.o drivers/pci/driver.o drivers/video/video.o drivers/usb/usbdrv.o drivers/input/inputdrv.o \
        net/network.o \
        /usr/src/linux/arch/i386/lib/lib.a /usr/src/linux/lib/lib.a /usr/src/linux/arch/i386/lib/lib.a \
        --end-group \
        -o vmlinux
drivers/char/drm/drm.o: In function `sis_fb_alloc':
drivers/char/drm/drm.o(.text+0x6a26): undefined reference to `sis_malloc'
drivers/char/drm/drm.o(.text+0x6a6d): undefined reference to `sis_free'
drivers/char/drm/drm.o: In function `sis_fb_free':
drivers/char/drm/drm.o(.text+0x6bb2): undefined reference to `sis_free'
drivers/char/drm/drm.o: In function `sis_final_context':
drivers/char/drm/drm.o(.text+0x7066): undefined reference to `sis_free'
make: *** [vmlinux] Error 1

</cut>

sis_free appears to be in linux/drivers/video/sis/sis_main.c
with its prototype in linux/drivers/video/sis/sis_main.h

linux/drivers/video/sis/sis_mm.c seems to be where the sis_fb_alloc
and sis_fb_free function calls are made.

Is there any obvious reasons why this isn't compiling?

Thanks in advance

****************************************************
*   Brett Nuske                                    *
*   3nd Year B.APP.SCI.(Computer Science)          *
*   COSC1082/CS118 Tutor                           *
*   City Tech. Helpdesk Staff (Computer Science)   *
****************************************************

Re: COMPILE BUG: SiS DRM Support

[Sebastian Droege]

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On Fri, 5 Apr 2002 22:22:05 +1000 (EST)
Brett Nuske <bnuske@cs.rmit.edu.au> wrote:

> 
> Hi,
> 
>    I have been trying to compile SiS DRM support
> with the 2.4.18 kernel (have tried both module
> and in the kernel) but to no avail. When built
> as a module it compiles but when the module gets
> loaded I get unresolved symbols.
> 
>    When trying to compile the support directly into
> the kernel I get the following compilation errors:
> 
> <cut>
> 
> ld -m elf_i386 -T /usr/src/linux/arch/i386/vmlinux.lds -e stext arch/i386/kernel/head.o arch/i386/kernel/init_task.o init/main.o init/version.o \
>         --start-group \
>         arch/i386/kernel/kernel.o arch/i386/mm/mm.o kernel/kernel.o mm/mm.o fs/fs.o ipc/ipc.o \
>          drivers/char/char.o drivers/block/block.o drivers/misc/misc.o drivers/net/net.o drivers/media/media.o drivers/char/agp/agp.o drivers/char/drm/drm.o drivers/ide/idedriver.o drivers/cdrom/driver.o drivers/sound/sounddrivers.o drivers/pci/driver.o drivers/video/video.o drivers/usb/usbdrv.o drivers/input/inputdrv.o \
>         net/network.o \
>         /usr/src/linux/arch/i386/lib/lib.a /usr/src/linux/lib/lib.a /usr/src/linux/arch/i386/lib/lib.a \
>         --end-group \
>         -o vmlinux
> drivers/char/drm/drm.o: In function `sis_fb_alloc':
> drivers/char/drm/drm.o(.text+0x6a26): undefined reference to `sis_malloc'
> drivers/char/drm/drm.o(.text+0x6a6d): undefined reference to `sis_free'
> drivers/char/drm/drm.o: In function `sis_fb_free':
> drivers/char/drm/drm.o(.text+0x6bb2): undefined reference to `sis_free'
> drivers/char/drm/drm.o: In function `sis_final_context':
> drivers/char/drm/drm.o(.text+0x7066): undefined reference to `sis_free'
> make: *** [vmlinux] Error 1
> 
> </cut>
> 
> sis_free appears to be in linux/drivers/video/sis/sis_main.c
> with its prototype in linux/drivers/video/sis/sis_main.h
> 
> linux/drivers/video/sis/sis_mm.c seems to be where the sis_fb_alloc
> and sis_fb_free function calls are made.
> 
> Is there any obvious reasons why this isn't compiling?
Try compiling with SiS framebuffer device (CONFIG_FB_SIS and CONFIG_FB_SIS_300 or CONFIG_FB_SIS_315) activated... the SiS DRI driver needs it... don't ask me why ;)

Bye

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Re: COMPILE BUG: SiS DRM Support

[Alan Cox]

>    I have been trying to compile SiS DRM support
> with the 2.4.18 kernel (have tried both module
> and in the kernel) but to no avail. When built

You must include SiS frame buffer support

Re: COMPILE BUG: SiS DRM Support

[James Simmons]

> > Is there any obvious reasons why this isn't compiling?
> Try compiling with SiS framebuffer device (CONFIG_FB_SIS and 
> CONFIG_FB_SIS_300 or CONFIG_FB_SIS_315) activated... the SiS DRI driver
> needs it... don't ask me why ;)

Because they share common code. It is actually better that they work
together since this way they will not step on each others toes. Someday I
plan to merge both the fbdev and drm interfaces together.

Re: COMPILE BUG: SiS DRM Support

[Thomas Winischhofer]

> > > Is there any obvious reasons why this isn't compiling?
> > Try compiling with SiS framebuffer device (CONFIG_FB_SIS and
> > CONFIG_FB_SIS_300 or CONFIG_FB_SIS_315) activated... the SiS DRI driver
> > needs it... don't ask me why ;)
> 
> Because they share common code. It is actually better that they work
> together since this way they will not step on each others toes. Someday I
> plan to merge both the fbdev and drm interfaces together.

More precisely, the framebuffer driver contains all the chipset and
therefore the memory (amount/type) detection stuff. It checks for
eventual Turbo/Commandqueue capabilities (which differ significantly
depending on the actual chipset used) and sets up a memory heap taking
all the hardware specifics into account. Moving the memory management to
the DRM module will result in a lot of duplicate code and a lack of
common memory management.

If you don't want to use the framebuffer, start it with no video mode
specified or with mode=none (or mode:none if as kernel parameter)

Thomas

PS: For updates of the SiS VGA drivers, please check my homepage.

-- 
Thomas Winischhofer
Vienna/Austria                 
mailto:thomas@winischhofer.net            http://www.winischhofer.net/