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wu-s
n00b
Joined: 22 May 2006
Posts: 41
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 Posted: Tue Oct 17, 2006 5:14 pm Post subject: rtl8187 fails building (kernel 2.6.18) - analysis,workaround |
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Hi gentoo forum,
this is an analysis of http://forums.gentoo.org/viewtopic-t-492479-highlight-rtl8187.html. I had the same problem with the unresolved symbols and finally managed to get a transitional solution. I don´t know if it is an amd64 issue.
Cause of the unresolved symbols:
The module r8187.ko is build in the directory beta-8187/ and needs some symbols of the module ieee80211, which is build in the directory iee80211/. Neither the code in beta-8187/ uses the function "request_module(...)" or the Makefile in beta-8187/ is considering that situation. Apparently the kbuild-system in kernel 2.6.18 does not like that.
Is anyone familiar with Makefiles for kernel modules? Should we link in the functions from the objects in ieee80211/ or use "request_module(..)" in beta-8187/? Where are the kernel-hackers out there? How should that be done correctly?
Hack to get the driver compiled:
Copy all the code and headers from beta-8187/ and ieee80211/ into a single directory and use that Makefile:
| Code: | EXTRA_CFLAGS += -I$(TOPDIR)/drivers/net/wireless
EXTRA_CFLAGS += -std=gnu89
EXTRA_CFLAGS += -O2
EXTRA_CFLAGS += -mhard-float -DCONFIG_FORCE_HARD_FLOAT=y
ieee80211-rtl-objs := ieee80211_softmac.o ieee80211_rx.o ieee80211_tx.o ieee80211_wx.o ieee80211_module.o ieee80211_softmac_wx.o
ieee80211_crypt-rtl-objs := ieee80211_crypt.o
ieee80211_crypt_tkip-rtl-objs := ieee80211_crypt_tkip.o
ieee80211_crypt_ccmp-rtl-objs := ieee80211_crypt_ccmp.o
ieee80211_crypt_wep-rtl-objs := ieee80211_crypt_wep.o
r8187-objs := r8187_core.o r8180_93cx6.o r8180_wx.o r8180_rtl8225.o r8180_rtl8225z2.o
obj-m +=r8187.o
obj-m +=ieee80211-rtl.o
obj-m +=ieee80211_crypt-rtl.o
obj-m +=ieee80211_crypt_wep-rtl.o
obj-m +=ieee80211_crypt_tkip-rtl.o
obj-m +=ieee80211_crypt_ccmp-rtl.o
KVER := $(shell uname -r)
KSRC := /lib/modules/$(KVER)/build
INSTALL_PREFIX :=
MODDESTDIR := /lib/modules/$(KVER)/extra/drivers/net/wireless
all: modules
clean:
rm -f *.mod.c *.mod *.o .*.cmd *.ko
rm -rf $(PWD)/tmp
modules:
$(MAKE) -C $(KSRC) M=$(PWD) modules
install: modules
mkdir -p $(MODDESTDIR)
install -p -m 644 r8187.ko ieee80211-rtl.ko ieee80211_crypt-rtl.ko ieee80211_crypt_wep-rtl.ko ieee80211_crypt_tkip-rtl.ko ieee80211_crypt_ccmp-rtl.ko $(MODDESTDIR) |
A final modification to resolve dependency correctly:
Another three lines need a modifiaction to resolve the dependency to our modified ieee80211-stack. Make sure the following lines look like this:
| Code: | ieee80211_softmac.c:2426: request_module("ieee80211_crypt_wep-rtl");
ieee80211_wx.c:331: request_module("ieee80211_crypt_wep-rtl");
ieee80211_wx.c:343: "load module ieee80211_crypt_wep-rtl\n", |
Would be nice if we can get r8187 working out of the box. The driver is used for the wifi-module on Asus P5B-Deluxe WiFi-Edition, e.g.
Cheers,
Sven
Last edited by wu-s on Tue Oct 17, 2006 11:31 pm; edited 1 time in total |
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wu-s
n00b
Joined: 22 May 2006
Posts: 41
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| Posted: Tue Oct 17, 2006 5:56 pm Post subject: |
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Ok, this is working somehow. But I would be very pleased it someone can confirm.
Unpack:
| Code: | # ebuild /usr/portage/net-wireless/rtl8187/rtl8187-1.10.ebuild unpack
* rtl8187-1.10.zip MD5 ;-) ... [ ok ]
* rtl8187-1.10.zip size ;-) ... [ ok ]
* checking ebuild checksums ;-) ... [ ok ]
* checking auxfile checksums ;-) ... [ ok ]
* checking miscfile checksums ;-) ... [ ok ]
* checking rtl8187-1.10.zip ;-) ... [ ok ]
* Determining the location of the kernel source code
* Found kernel source directory:
* /usr/src/linux
* Found sources for kernel version:
* 2.6.18-suspend2
>>> Unpacking source...
>>> Unpacking rtl8187-1.10.zip to /var/tmp/portage/rtl8187-1.10/work
* Applying module-param-and-isoc.patch ... [ ok ]
>>> Source unpacked. |
Use the following Makefile in /var/tmp/portage/rtl8187-1.10/work/rtl8187_linuxdrv_V1.1:
| Code: | EXTRA_CFLAGS += -I$(TOPDIR)/drivers/net/wireless
EXTRA_CFLAGS += -O2
KVER := $(shell uname -r)
KSRC := /lib/modules/$(KVER)/build
INSTALL_PREFIX :=
MODDESTDIR := /lib/modules/$(KVER)/kernel/drivers/net/wireless
obj-m := beta-8187/ ieee80211/
all: modules
clean:
cd $(PWD)/beta-8187
rm -f *.mod.c *.mod *.o .*.cmd *.ko
cd $(PWD)/ieee80211/
rm -f *.mod.c *.mod *.o .*.cmd *.ko
rm -rf $(PWD)/tmp
modules:
$(MAKE) -C $(KSRC) SUBDIRS=$(PWD) modules
install:
mkdir -p $(MODDESTDIR)
install -p -m 644 beta-8187/r8187.ko \
ieee80211/ieee80211-rtl.ko ieee80211/ieee80211_crypt-rtl.ko \
ieee80211/ieee80211_crypt_wep-rtl.ko ieee80211/ieee80211_crypt_tkip-rtl.ko \
ieee80211/ieee80211_crypt_ccmp-rtl.ko $(MODDESTDIR)
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Makefile for /var/tmp/portage/rtl8187-1.10/work/rtl8187_linuxdrv_V1.1/beta-8187:
| Code: | EXTRA_CFLAGS += -std=gnu89
EXTRA_CFLAGS += -mhard-float -DCONFIG_FORCE_HARD_FLOAT=y
r8187-objs := r8187_core.o r8180_93cx6.o r8180_wx.o r8180_rtl8225.o r8180_rtl8225z2.o
obj-m := r8187.o
all: modules
modules:
$(MAKE) -C $(KSRC) SUBDIRS=$(PWD) M=$(PWD) modules |
Makefile for /var/tmp/portage/rtl8187-1.10/work/rtl8187_linuxdrv_V1.1/ieee80211:
| Code: | ieee80211-rtl-objs := ieee80211_softmac.o ieee80211_rx.o ieee80211_tx.o ieee80211_wx.o ieee80211_module.o ieee80211_softmac_wx.o
ieee80211_crypt-rtl-objs := ieee80211_crypt.o
ieee80211_crypt_tkip-rtl-objs := ieee80211_crypt_tkip.o
ieee80211_crypt_ccmp-rtl-objs := ieee80211_crypt_ccmp.o
ieee80211_crypt_wep-rtl-objs := ieee80211_crypt_wep.o
obj-m +=ieee80211-rtl.o
obj-m +=ieee80211_crypt-rtl.o
obj-m +=ieee80211_crypt_wep-rtl.o
obj-m +=ieee80211_crypt_tkip-rtl.o
obj-m +=ieee80211_crypt_ccmp-rtl.o
all: modules
modules:
$(MAKE) -C $(KSRC) SUBDIRS=$(PWD) M=$(PWD) modules |
As already said, it seems to be working, but is it a correct way to do it? How can we integrate it to the .ebuild? As an additional patch? Can we inform the ebuild-maintainer?
Don´t forget to patch ieee80211/ieee80211_softmac.c and ieee80211/ieee80211_wx.c as described in the last post.
Cheers,
Sven |
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wu-s
n00b
Joined: 22 May 2006
Posts: 41
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wu-s
n00b
Joined: 22 May 2006
Posts: 41
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| Posted: Tue Oct 24, 2006 2:11 pm Post subject: |
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OK, here the service to do copy-and-paste:
Use the following Makefile in /var/tmp/portage/rtl8187-1.10/work/rtl8187_linuxdrv_V1.1:
| Code: | EXTRA_CFLAGS += -I$(TOPDIR)/drivers/net/wireless
EXTRA_CFLAGS += -O2
KVER := $(shell uname -r)
KSRC := /lib/modules/$(KVER)/build
INSTALL_PREFIX :=
MODDESTDIR := /lib/modules/$(KVER)/extra/drivers/net/wireless
#ifneq ($(KERNELRELEASE),)
obj-m := beta-8187/ ieee80211/
#else
all: modules
clean:
$(MAKE) -C $(KSRC) M=$(PWD) clean
modules:
$(MAKE) -C $(KSRC) M=$(PWD) modules
install:
mkdir -p $(MODDESTDIR)
install -p -m 644 beta-8187/r8187.ko \
ieee80211/ieee80211-rtl.ko \
ieee80211/ieee80211_crypt-rtl.ko \
ieee80211/ieee80211_crypt_wep-rtl.ko \
ieee80211/ieee80211_crypt_tkip-rtl.ko \
ieee80211/ieee80211_crypt_ccmp-rtl.ko $(MODDESTDIR)
#endif
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Makefile for /var/tmp/portage/rtl8187-1.10/work/rtl8187_linuxdrv_V1.1/beta-8187:
| Code: | EXTRA_CFLAGS += -std=gnu89
EXTRA_CFLAGS += -mhard-float -DCONFIG_FORCE_HARD_FLOAT=y
r8187-objs := r8187_core.o r8180_93cx6.o r8180_wx.o r8180_rtl8225.o r8180_rtl8225z2.o
obj-m := r8187.o
all: modules
modules:
$(MAKE) -C $(KSRC) M=$(PWD) modules
clean:
$(MAKE) -C $(KSRC) M=$(PWD) clean
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Makefile for /var/tmp/portage/rtl8187-1.10/work/rtl8187_linuxdrv_V1.1/ieee80211:
| Code: | ieee80211-rtl-objs := ieee80211_softmac.o ieee80211_rx.o ieee80211_tx.o ieee80211_wx.o ieee80211_module.o ieee80211_softmac_wx.o
ieee80211_crypt-rtl-objs := ieee80211_crypt.o
ieee80211_crypt_tkip-rtl-objs := ieee80211_crypt_tkip.o
ieee80211_crypt_ccmp-rtl-objs := ieee80211_crypt_ccmp.o
ieee80211_crypt_wep-rtl-objs := ieee80211_crypt_wep.o
obj-m +=ieee80211-rtl.o
obj-m +=ieee80211_crypt-rtl.o
obj-m +=ieee80211_crypt_wep-rtl.o
obj-m +=ieee80211_crypt_tkip-rtl.o
obj-m +=ieee80211_crypt_ccmp-rtl.o
all: modules
modules:
$(MAKE) -C $(KSRC) M=$(PWD) modules
clean:
$(MAKE) -C $(KSRC) M=$(PWD) clean
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"make" and "make install" in /var/tmp/portage/rtl8187-1.10/work/rtl8187_linuxdrv_V1.1 don't forget to run "depmod -ae".
i linked this thread with https://bugs.gentoo.org/show_bug.cgi?id=143103.
cheers,
sven |
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l_bratch
Guru
Joined: 08 Feb 2005
Posts: 489
Location: Jersey
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| Posted: Sun Dec 31, 2006 2:42 pm Post subject: |
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Thanks for the info, this works fine for me.
kernel: 2.6.18-gentoo-r2
lsusb of card: 0bda:8187 Realtek Semiconductor Corp.
I thought it wasn't working again, but it turns out I had to set the bitrate manually (unlike with other drivers I've used):
iwconfig wlan0 rate 11M
It was setting itself to 54Mb/s, but my AP only supports 11Mb/s.
Edit:
Forgot to mention that's an x86_64 kernel. |
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