freebsd-dev/sys/conf/files.i386

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1993-08-21 22:24:24 +00:00
# This file tells config what files go into building a kernel,
# files marked standard are always included.
1993-06-12 14:58:17 +00:00
#
# $Id: files.i386,v 1.246 1999/06/01 18:18:38 jlemon Exp $
Mega-commit for Linux emulator update.. This has been stress tested under netscape-2.0 for Linux running all the Java stuff. The scrollbars are now working, at least on my machine. (whew! :-) I'm uncomfortable with the size of this commit, but it's too inter-dependant to easily seperate out. The main changes: COMPAT_LINUX is *GONE*. Most of the code has been moved out of the i386 machine dependent section into the linux emulator itself. The int 0x80 syscall code was almost identical to the lcall 7,0 code and a minor tweak allows them to both be used with the same C code. All kernels can now just modload the lkm and it'll DTRT without having to rebuild the kernel first. Like IBCS2, you can statically compile it in with "options LINUX". A pile of new syscalls implemented, including getdents(), llseek(), readv(), writev(), msync(), personality(). The Linux-ELF libraries want to use some of these. linux_select() now obeys Linux semantics, ie: returns the time remaining of the timeout value rather than leaving it the original value. Quite a few bugs removed, including incorrect arguments being used in syscalls.. eg: mixups between passing the sigset as an int, vs passing it as a pointer and doing a copyin(), missing return values, unhandled cases, SIOC* ioctls, etc. The build for the code has changed. i386/conf/files now knows how to build linux_genassym and generate linux_assym.h on the fly. Supporting changes elsewhere in the kernel: The user-mode signal trampoline has moved from the U area to immediately below the top of the stack (below PS_STRINGS). This allows the different binary emulations to have their own signal trampoline code (which gets rid of the hardwired syscall 103 (sigreturn on BSD, syslog on Linux)) and so that the emulator can provide the exact "struct sigcontext *" argument to the program's signal handlers. The sigstack's "ss_flags" now uses SS_DISABLE and SS_ONSTACK flags, which have the same values as the re-used SA_DISABLE and SA_ONSTACK which are intended for sigaction only. This enables the support of a SA_RESETHAND flag to sigaction to implement the gross SYSV and Linux SA_ONESHOT signal semantics where the signal handler is reset when it's triggered. makesyscalls.sh no longer appends the struct sysentvec on the end of the generated init_sysent.c code. It's a lot saner to have it in a seperate file rather than trying to update the structure inside the awk script. :-) At exec time, the dozen bytes or so of signal trampoline code are copied to the top of the user's stack, rather than obtaining the trampoline code the old way by getting a clone of the parent's user area. This allows Linux and native binaries to freely exec each other without getting trampolines mixed up.
1996-03-02 19:38:20 +00:00
#
# The long compile-with and dependency lines are required because of
# limitations in config: backslash-newline doesn't work in strings, and
# dependency lines other than the first are silently ignored.
#
linux_genassym optional compat_linux \
Mega-commit for Linux emulator update.. This has been stress tested under netscape-2.0 for Linux running all the Java stuff. The scrollbars are now working, at least on my machine. (whew! :-) I'm uncomfortable with the size of this commit, but it's too inter-dependant to easily seperate out. The main changes: COMPAT_LINUX is *GONE*. Most of the code has been moved out of the i386 machine dependent section into the linux emulator itself. The int 0x80 syscall code was almost identical to the lcall 7,0 code and a minor tweak allows them to both be used with the same C code. All kernels can now just modload the lkm and it'll DTRT without having to rebuild the kernel first. Like IBCS2, you can statically compile it in with "options LINUX". A pile of new syscalls implemented, including getdents(), llseek(), readv(), writev(), msync(), personality(). The Linux-ELF libraries want to use some of these. linux_select() now obeys Linux semantics, ie: returns the time remaining of the timeout value rather than leaving it the original value. Quite a few bugs removed, including incorrect arguments being used in syscalls.. eg: mixups between passing the sigset as an int, vs passing it as a pointer and doing a copyin(), missing return values, unhandled cases, SIOC* ioctls, etc. The build for the code has changed. i386/conf/files now knows how to build linux_genassym and generate linux_assym.h on the fly. Supporting changes elsewhere in the kernel: The user-mode signal trampoline has moved from the U area to immediately below the top of the stack (below PS_STRINGS). This allows the different binary emulations to have their own signal trampoline code (which gets rid of the hardwired syscall 103 (sigreturn on BSD, syslog on Linux)) and so that the emulator can provide the exact "struct sigcontext *" argument to the program's signal handlers. The sigstack's "ss_flags" now uses SS_DISABLE and SS_ONSTACK flags, which have the same values as the re-used SA_DISABLE and SA_ONSTACK which are intended for sigaction only. This enables the support of a SA_RESETHAND flag to sigaction to implement the gross SYSV and Linux SA_ONESHOT signal semantics where the signal handler is reset when it's triggered. makesyscalls.sh no longer appends the struct sysentvec on the end of the generated init_sysent.c code. It's a lot saner to have it in a seperate file rather than trying to update the structure inside the awk script. :-) At exec time, the dozen bytes or so of signal trampoline code are copied to the top of the user's stack, rather than obtaining the trampoline code the old way by getting a clone of the parent's user area. This allows Linux and native binaries to freely exec each other without getting trampolines mixed up.
1996-03-02 19:38:20 +00:00
dependency "$S/i386/linux/linux_genassym.c $S/i386/linux/linux.h" \
compile-with "${CC} ${CFLAGS} ${PARAM} -UKERNEL -o $@ $<" \
Mega-commit for Linux emulator update.. This has been stress tested under netscape-2.0 for Linux running all the Java stuff. The scrollbars are now working, at least on my machine. (whew! :-) I'm uncomfortable with the size of this commit, but it's too inter-dependant to easily seperate out. The main changes: COMPAT_LINUX is *GONE*. Most of the code has been moved out of the i386 machine dependent section into the linux emulator itself. The int 0x80 syscall code was almost identical to the lcall 7,0 code and a minor tweak allows them to both be used with the same C code. All kernels can now just modload the lkm and it'll DTRT without having to rebuild the kernel first. Like IBCS2, you can statically compile it in with "options LINUX". A pile of new syscalls implemented, including getdents(), llseek(), readv(), writev(), msync(), personality(). The Linux-ELF libraries want to use some of these. linux_select() now obeys Linux semantics, ie: returns the time remaining of the timeout value rather than leaving it the original value. Quite a few bugs removed, including incorrect arguments being used in syscalls.. eg: mixups between passing the sigset as an int, vs passing it as a pointer and doing a copyin(), missing return values, unhandled cases, SIOC* ioctls, etc. The build for the code has changed. i386/conf/files now knows how to build linux_genassym and generate linux_assym.h on the fly. Supporting changes elsewhere in the kernel: The user-mode signal trampoline has moved from the U area to immediately below the top of the stack (below PS_STRINGS). This allows the different binary emulations to have their own signal trampoline code (which gets rid of the hardwired syscall 103 (sigreturn on BSD, syslog on Linux)) and so that the emulator can provide the exact "struct sigcontext *" argument to the program's signal handlers. The sigstack's "ss_flags" now uses SS_DISABLE and SS_ONSTACK flags, which have the same values as the re-used SA_DISABLE and SA_ONSTACK which are intended for sigaction only. This enables the support of a SA_RESETHAND flag to sigaction to implement the gross SYSV and Linux SA_ONESHOT signal semantics where the signal handler is reset when it's triggered. makesyscalls.sh no longer appends the struct sysentvec on the end of the generated init_sysent.c code. It's a lot saner to have it in a seperate file rather than trying to update the structure inside the awk script. :-) At exec time, the dozen bytes or so of signal trampoline code are copied to the top of the user's stack, rather than obtaining the trampoline code the old way by getting a clone of the parent's user area. This allows Linux and native binaries to freely exec each other without getting trampolines mixed up.
1996-03-02 19:38:20 +00:00
no-obj no-implicit-rule \
clean "linux_genassym"
#
linux_assym.h optional compat_linux \
dependency "linux_genassym" \
Mega-commit for Linux emulator update.. This has been stress tested under netscape-2.0 for Linux running all the Java stuff. The scrollbars are now working, at least on my machine. (whew! :-) I'm uncomfortable with the size of this commit, but it's too inter-dependant to easily seperate out. The main changes: COMPAT_LINUX is *GONE*. Most of the code has been moved out of the i386 machine dependent section into the linux emulator itself. The int 0x80 syscall code was almost identical to the lcall 7,0 code and a minor tweak allows them to both be used with the same C code. All kernels can now just modload the lkm and it'll DTRT without having to rebuild the kernel first. Like IBCS2, you can statically compile it in with "options LINUX". A pile of new syscalls implemented, including getdents(), llseek(), readv(), writev(), msync(), personality(). The Linux-ELF libraries want to use some of these. linux_select() now obeys Linux semantics, ie: returns the time remaining of the timeout value rather than leaving it the original value. Quite a few bugs removed, including incorrect arguments being used in syscalls.. eg: mixups between passing the sigset as an int, vs passing it as a pointer and doing a copyin(), missing return values, unhandled cases, SIOC* ioctls, etc. The build for the code has changed. i386/conf/files now knows how to build linux_genassym and generate linux_assym.h on the fly. Supporting changes elsewhere in the kernel: The user-mode signal trampoline has moved from the U area to immediately below the top of the stack (below PS_STRINGS). This allows the different binary emulations to have their own signal trampoline code (which gets rid of the hardwired syscall 103 (sigreturn on BSD, syslog on Linux)) and so that the emulator can provide the exact "struct sigcontext *" argument to the program's signal handlers. The sigstack's "ss_flags" now uses SS_DISABLE and SS_ONSTACK flags, which have the same values as the re-used SA_DISABLE and SA_ONSTACK which are intended for sigaction only. This enables the support of a SA_RESETHAND flag to sigaction to implement the gross SYSV and Linux SA_ONESHOT signal semantics where the signal handler is reset when it's triggered. makesyscalls.sh no longer appends the struct sysentvec on the end of the generated init_sysent.c code. It's a lot saner to have it in a seperate file rather than trying to update the structure inside the awk script. :-) At exec time, the dozen bytes or so of signal trampoline code are copied to the top of the user's stack, rather than obtaining the trampoline code the old way by getting a clone of the parent's user area. This allows Linux and native binaries to freely exec each other without getting trampolines mixed up.
1996-03-02 19:38:20 +00:00
compile-with "./linux_genassym > $@" \
no-obj no-implicit-rule before-depend \
clean "linux_assym.h"
#
font8x16.o optional std8x16font \
compile-with "uudecode < /usr/share/syscons/fonts/${STD8X16FONT}-8x16.fnt && file2c 'unsigned char font_16[16*256] = {' '};' < ${STD8X16FONT}-8x16 > font8x16.c && ${CC} -c ${CFLAGS} font8x16.c" \
no-implicit-rule before-depend \
clean "${STD8X16FONT}-8x16 font8x16.c"
#
atkbdmap.h optional atkbd_dflt_keymap \
compile-with "kbdcontrol -L ${ATKBD_DFLT_KEYMAP} | sed -e 's/^static keymap_t.* = /static keymap_t key_map = /' -e 's/^static accentmap_t.* = /static accentmap_t accent_map = /' > atkbdmap.h" \
no-obj no-implicit-rule before-depend \
clean "atkbdmap.h"
#
ukbdmap.h optional ukbd_dflt_keymap \
compile-with "kbdcontrol -L ${UKBD_DFLT_KEYMAP} | sed -e 's/^static keymap_t.* = /static keymap_t key_map = /' -e 's/^static accentmap_t.* = /static accentmap_t accent_map = /' > ukbdmap.h" \
no-obj no-implicit-rule before-depend \
clean "ukbdmap.h"
#
Finally!! The much roumored replacement for our current IDE/ATA/ATAPI is materialising in the CVS repositories around the globe. So what does this bring us: A new reengineered ATA/ATAPI subsystem, that tries to overcome most of the deficiencies with the current drivers. It supports PCI as well as ISA devices without all the hackery in ide_pci.c to make PCI devices look like ISA counterparts. It doesn't have the excessive wait problem on probe, in fact you shouldn't notice any delay when your devices are getting probed. Probing and attaching of devices are postponed until interrupts are enabled (well almost, not finished yet for disks), making things alot cleaner. Improved performance, although DMA support is still WIP and not in this pre alpha release, worldstone is faster with the new driver compared to the old even with DMA. So what does it take away: There is NO support for old MFM/RLL/ESDI disks. There is NO support for bad144, if your disk is bad, ditch it, it has already outgrown its internal spare sectors, and is dying. For you to try this out, you will have to modify your kernel config file to use the "ata" controller instead of all wdc? entries. example: # for a PCI only system (most modern machines) controller ata0 device atadisk0 # ATA disks device atapicd0 # ATAPI CDROM's device atapist0 # ATAPI tapes #You should add the following on ISA systems: controller ata1 at isa? port "IO_WD1" bio irq 14 controller ata2 at isa? port "IO_WD2" bio irq 15 You can leave it all in there, the system knows how to manage. For now this driver reuses the device entries from the old system (that will probably change later), but remember that disks are now numbered in the sequence they are found (like the SCSI system) not as absolute positions as the old system. Although I have tested this on all the systems I can get my hands on, there might very well be gremlins in there, so use AT YOU OWN RISK!! This is still WIP, so there are lots of rough edges and unfinished things in there, and what I have in my lab might look very different from whats in CVS at any given time. So please have all eventual changes go through me, or chances are they just dissapears... I would very much like to hear from you, both good and bad news are very welcome. Enjoy!! -Søren
1999-03-01 21:19:19 +00:00
dev/ata/ata-all.c optional ata device-driver
Fourth update to the new ATA/ATAPI driver: Well, better late than newer, but things has been hectic around here, sorry for the long delay. DMA support has been added to the ATA disk driver. This only works on Intel PIIX3/4, Acer Aladdin and Promise controllers. The promise support works without the BIOS on the board, and timing modes are set to support up to UDMA speed. This solves the problems with having more than one promise controller in the same system. There is support for "generic" DMA, that might work on other controllers, but now you have been warned :) More chipset specific code will come soon, I have to find testers with the approbiate HW, more on that when I have it ready. The system now uses its own major numbers, please run MAKEDEV with the devices you need (ad?, acd?, afd?, ast?). For now the disk driver will also attach to the old wd major so one can at least boot without this step, but be warned, this will eventually go away. The bootblocks will have to be changed before one can boot directly from an "ad" device though. Fixed problems: All known hang problems should be solved The probe code has been sligthly changed, this should solve the reports I have lying around (I hope). Hangs when accessing ata & atapi device on the same channel simultaniously. A real braino in ata_start caused this, fixed. As usual USE AT YOUR OWN RISK!!, this is still pre alpha level code. Especially the DMA support can hose your disk real bad if anything goes wrong, agaiin you have been warned :) But please tell me how it works for you! Enjoy! -Søren
1999-03-28 18:57:20 +00:00
dev/ata/ata-dma.c optional ata device-driver
Finally!! The much roumored replacement for our current IDE/ATA/ATAPI is materialising in the CVS repositories around the globe. So what does this bring us: A new reengineered ATA/ATAPI subsystem, that tries to overcome most of the deficiencies with the current drivers. It supports PCI as well as ISA devices without all the hackery in ide_pci.c to make PCI devices look like ISA counterparts. It doesn't have the excessive wait problem on probe, in fact you shouldn't notice any delay when your devices are getting probed. Probing and attaching of devices are postponed until interrupts are enabled (well almost, not finished yet for disks), making things alot cleaner. Improved performance, although DMA support is still WIP and not in this pre alpha release, worldstone is faster with the new driver compared to the old even with DMA. So what does it take away: There is NO support for old MFM/RLL/ESDI disks. There is NO support for bad144, if your disk is bad, ditch it, it has already outgrown its internal spare sectors, and is dying. For you to try this out, you will have to modify your kernel config file to use the "ata" controller instead of all wdc? entries. example: # for a PCI only system (most modern machines) controller ata0 device atadisk0 # ATA disks device atapicd0 # ATAPI CDROM's device atapist0 # ATAPI tapes #You should add the following on ISA systems: controller ata1 at isa? port "IO_WD1" bio irq 14 controller ata2 at isa? port "IO_WD2" bio irq 15 You can leave it all in there, the system knows how to manage. For now this driver reuses the device entries from the old system (that will probably change later), but remember that disks are now numbered in the sequence they are found (like the SCSI system) not as absolute positions as the old system. Although I have tested this on all the systems I can get my hands on, there might very well be gremlins in there, so use AT YOU OWN RISK!! This is still WIP, so there are lots of rough edges and unfinished things in there, and what I have in my lab might look very different from whats in CVS at any given time. So please have all eventual changes go through me, or chances are they just dissapears... I would very much like to hear from you, both good and bad news are very welcome. Enjoy!! -Søren
1999-03-01 21:19:19 +00:00
dev/ata/atapi-all.c optional ata device-driver
dev/ata/ata-disk.c optional atadisk device-driver
dev/ata/atapi-cd.c optional atapicd device-driver
dev/ata/atapi-fd.c optional atapifd device-driver
Finally!! The much roumored replacement for our current IDE/ATA/ATAPI is materialising in the CVS repositories around the globe. So what does this bring us: A new reengineered ATA/ATAPI subsystem, that tries to overcome most of the deficiencies with the current drivers. It supports PCI as well as ISA devices without all the hackery in ide_pci.c to make PCI devices look like ISA counterparts. It doesn't have the excessive wait problem on probe, in fact you shouldn't notice any delay when your devices are getting probed. Probing and attaching of devices are postponed until interrupts are enabled (well almost, not finished yet for disks), making things alot cleaner. Improved performance, although DMA support is still WIP and not in this pre alpha release, worldstone is faster with the new driver compared to the old even with DMA. So what does it take away: There is NO support for old MFM/RLL/ESDI disks. There is NO support for bad144, if your disk is bad, ditch it, it has already outgrown its internal spare sectors, and is dying. For you to try this out, you will have to modify your kernel config file to use the "ata" controller instead of all wdc? entries. example: # for a PCI only system (most modern machines) controller ata0 device atadisk0 # ATA disks device atapicd0 # ATAPI CDROM's device atapist0 # ATAPI tapes #You should add the following on ISA systems: controller ata1 at isa? port "IO_WD1" bio irq 14 controller ata2 at isa? port "IO_WD2" bio irq 15 You can leave it all in there, the system knows how to manage. For now this driver reuses the device entries from the old system (that will probably change later), but remember that disks are now numbered in the sequence they are found (like the SCSI system) not as absolute positions as the old system. Although I have tested this on all the systems I can get my hands on, there might very well be gremlins in there, so use AT YOU OWN RISK!! This is still WIP, so there are lots of rough edges and unfinished things in there, and what I have in my lab might look very different from whats in CVS at any given time. So please have all eventual changes go through me, or chances are they just dissapears... I would very much like to hear from you, both good and bad news are very welcome. Enjoy!! -Søren
1999-03-01 21:19:19 +00:00
dev/ata/atapi-tape.c optional atapist device-driver
dev/fb/fb.c optional fb device-driver
dev/fb/fb.c optional vga device-driver
dev/fb/splash.c optional splash
dev/kbd/atkbd.c optional atkbd device-driver
dev/kbd/atkbdc.c optional atkbdc device-driver
dev/kbd/kbd.c optional atkbd device-driver
dev/kbd/kbd.c optional kbd device-driver
dev/kbd/kbd.c optional ukbd device-driver
dev/syscons/syscons.c optional sc device-driver
dev/syscons/scvidctl.c optional sc device-driver
dev/syscons/scvesactl.c optional sc device-driver
i386/apm/apm.c optional apm device-driver
i386/apm/apm_setup.s optional apm
i386/eisa/dpt_eisa.c optional eisa dpt device-driver
i386/eisa/3c5x9.c optional ep device-driver
i386/eisa/adv_eisa.c optional adv device-driver
i386/eisa/ahc_eisa.c optional eisa ahc device-driver \
dependency "aic7xxx_reg.h $S/i386/eisa/ahc_eisa.c"
i386/eisa/ahb.c optional ahb device-driver
i386/eisa/bt_eisa.c optional bt device-driver
i386/eisa/eisaconf.c optional eisa
i386/eisa/if_vx_eisa.c optional vx device-driver
i386/eisa/if_fea.c optional fea device-driver
i386/i386/autoconf.c standard device-driver
1997-08-01 06:04:34 +00:00
i386/i386/bios.c standard
i386/i386/bioscall.s standard
i386/i386/busdma_machdep.c standard
1993-06-12 14:58:17 +00:00
i386/i386/cons.c standard
i386/i386/db_disasm.c optional ddb
i386/i386/db_interface.c optional ddb
i386/i386/db_trace.c optional ddb
i386/i386/elf_machdep.c standard
i386/i386/exception.s standard
i386/i386/globals.s standard
i386/i386/i386-gdbstub.c optional ddb
i386/i386/identcpu.c standard
1993-06-12 14:58:17 +00:00
i386/i386/in_cksum.c optional inet
i386/i386/initcpu.c standard
# locore.s needs to be handled in Makefile to put it first. Otherwise it's
# now normal.
# i386/i386/locore.s standard
i386/i386/machdep.c standard
i386/i386/math_emulate.c optional math_emulate
1993-06-12 14:58:17 +00:00
i386/i386/mem.c standard
i386/i386/i686_mem.c standard
i386/i386/k6_mem.c standard
i386/i386/mp_machdep.c optional smp
i386/i386/mpapic.c optional smp
i386/i386/mpboot.s optional smp
i386/i386/mplock.s optional smp
i386/i386/nexus.c standard
Improved non-statistical (GUPROF) profiling: - use a more accurate and more efficient method of compensating for overheads. The old method counted too much time against leaf functions. - normally use the Pentium timestamp counter if available. On Pentiums, the times are now accurate to within a couple of cpu clock cycles per function call in the (unlikely) event that there are no cache misses in or caused by the profiling code. - optionally use an arbitrary Pentium event counter if available. - optionally regress to using the i8254 counter. - scaled the i8254 counter by a factor of 128. Now the i8254 counters overflow slightly faster than the TSC counters for a 150MHz Pentium :-) (after about 16 seconds). This is to avoid fractional overheads. files.i386: permon.c temporarily has to be classified as a profiling-routine because a couple of functions in it may be called from profiling code. options.i386: - I586_CTR_GUPROF is currently unused (oops). - I586_PMC_GUPROF should be something like 0x70000 to enable (but not use unless prof_machdep.c is changed) support for Pentium event counters. 7 is a control mode and the counter number 0 is somewhere in the 0000 bits (see perfmon.h for the encoding). profile.h: - added declarations. - cleaned up separation of user mode declarations. prof_machdep.c: Mostly clock-select changes. The default clock can be changed by editing kmem. There should be a sysctl for this. subr_prof.c: - added copyright. - calibrate overheads for the new method. - documented new method. - fixed races and and machine dependencies in start/stop code. mcount.c: Use the new overhead compensation method. gmon.h: - changed GPROF4 counter type from unsigned to int. Oops, this should be machine-dependent and/or int32_t. - reorganized overhead counters. Submitted by: Pentium event counter changes mostly by wollman
1996-10-17 19:32:31 +00:00
i386/i386/perfmon.c optional perfmon profiling-routine
i386/i386/perfmon.c optional perfmon
1993-06-12 14:58:17 +00:00
i386/i386/pmap.c standard
i386/i386/procfs_machdep.c standard
i386/i386/simplelock.s optional smp
i386/i386/support.s standard
i386/i386/swtch.s standard
1993-06-12 14:58:17 +00:00
i386/i386/sys_machdep.c standard
i386/i386/trap.c standard
i386/i386/userconfig.c optional userconfig
1993-06-12 14:58:17 +00:00
i386/i386/vm_machdep.c standard
i386/i386/vm86.c standard
i386/ibcs2/ibcs2_fcntl.c optional ibcs2
i386/ibcs2/ibcs2_stat.c optional ibcs2
i386/ibcs2/ibcs2_ipc.c optional ibcs2
i386/ibcs2/ibcs2_msg.c optional ibcs2
i386/ibcs2/ibcs2_misc.c optional ibcs2
i386/ibcs2/ibcs2_other.c optional ibcs2
i386/ibcs2/ibcs2_signal.c optional ibcs2
i386/ibcs2/ibcs2_ioctl.c optional ibcs2
i386/ibcs2/ibcs2_socksys.c optional ibcs2
i386/ibcs2/ibcs2_sysi86.c optional ibcs2
i386/ibcs2/ibcs2_util.c optional ibcs2
i386/ibcs2/ibcs2_isc.c optional ibcs2
i386/ibcs2/ibcs2_isc_sysent.c optional ibcs2
i386/ibcs2/ibcs2_xenix.c optional ibcs2
i386/ibcs2/ibcs2_xenix_sysent.c optional ibcs2
i386/ibcs2/ibcs2_errno.c optional ibcs2
i386/ibcs2/ibcs2_sysent.c optional ibcs2
i386/ibcs2/ibcs2_sysvec.c optional ibcs2
i386/ibcs2/imgact_coff.c optional ibcs2
i386/isa/adv_isa.c optional adv device-driver
#i386/isa/aha1542.c optional aha device-driver
i386/isa/aha_isa.c optional aha device-driver
isa/atkbd_isa.c optional atkbd device-driver
isa/atkbdc_isa.c optional atkbdc device-driver
i386/isa/bt_isa.c optional bt device-driver
1993-06-12 14:58:17 +00:00
i386/isa/clock.c standard
i386/isa/cronyx.c optional cx device-driver
i386/isa/ctx.c optional ctx device-driver
i386/isa/cx.c optional cx device-driver
i386/isa/cy.c optional cy device-driver
i386/isa/diskslice_machdep.c standard
i386/isa/elink.c optional ep device-driver
i386/isa/elink.c optional ie device-driver
isa/fd.c optional fd device-driver
i386/isa/fla.c optional fla device-driver
i386/isa/gpib.c optional gp device-driver
i386/isa/asc.c optional asc device-driver
i386/isa/gsc.c optional gsc device-driver
i386/isa/if_ar.c optional ar device-driver
i386/isa/if_cs.c optional cs device-driver
i386/isa/if_cx.c optional cx device-driver
1993-06-12 14:58:17 +00:00
i386/isa/if_ed.c optional ed device-driver
i386/isa/if_el.c optional el device-driver
i386/isa/if_ep.c optional ep device-driver
i386/isa/if_ex.c optional ex device-driver
i386/isa/if_fe.c optional fe device-driver
i386/isa/if_ie.c optional ie device-driver
i386/isa/if_le.c optional le device-driver
i386/isa/if_lnc.c optional lnc device-driver
i386/isa/if_rdp.c optional rdp device-driver
i386/isa/if_sr.c optional sr device-driver
i386/isa/if_wi.c optional wi device-driver
i386/isa/if_wl.c optional wl device-driver
1999-05-14 03:57:25 +00:00
dev/pccard/if_xe.c optional xe device-driver
i386/isa/if_ze.c optional ze device-driver
i386/isa/if_zp.c optional zp device-driver
1999-03-30 21:32:43 +00:00
contrib/dev/oltr/if_oltr.c optional oltr device-driver
trlld.o optional oltr device-driver \
dependency "$S/contrib/dev/oltr/i386-${KERNFORMAT}.trlld.o.uu" \
compile-with "uudecode < $S/contrib/dev/oltr/i386-${KERNFORMAT}.trlld.o.uu" \
no-implicit-rule
contrib/dev/oltr/trlldmac.c optional oltr device-driver
contrib/dev/oltr/trlldhm.c optional oltr device-driver
contrib/dev/oltr/trlldbm.c optional oltr device-driver
i386/isa/ipl_funcs.c standard \
compile-with "${CC} -c ${CFLAGS} ${DEFINED_PROF:S/^$/-fomit-frame-pointer/} $<"
i386/isa/intr_machdep.c standard
1993-06-12 14:58:17 +00:00
i386/isa/isa.c optional isa device-driver
i386/isa/istallion.c optional stli device-driver
1995-01-25 21:04:15 +00:00
i386/isa/joy.c optional joy device-driver
i386/isa/loran.c optional loran device-driver
i386/isa/labpc.c optional labpc device-driver
i386/isa/mcd.c optional mcd device-driver
1993-06-12 14:58:17 +00:00
i386/isa/mse.c optional mse device-driver
i386/isa/npx.c mandatory npx device-driver
1994-04-21 14:13:43 +00:00
i386/isa/pcaudio.c optional pca device-driver
i386/isa/matcd/matcd.c optional matcd device-driver
i386/isa/isa_compat.c optional isa device-driver
i386/isa/isa_dma.c optional isa device-driver
i386/isa/pcibus.c optional pci device-driver
i386/isa/pcicx.c optional ze device-driver
i386/isa/pcicx.c optional zp device-driver
i386/isa/pcvt/pcvt_drv.c optional vt device-driver
i386/isa/pcvt/pcvt_ext.c optional vt device-driver
i386/isa/pcvt/pcvt_kbd.c optional vt device-driver
i386/isa/pcvt/pcvt_out.c optional vt device-driver
i386/isa/pcvt/pcvt_sup.c optional vt device-driver
i386/isa/pcvt/pcvt_vtf.c optional vt device-driver
1997-09-09 12:40:54 +00:00
i386/isa/pnp.c optional pnp device-driver
i386/isa/prof_machdep.c optional profiling-routine
i386/isa/ppc.c optional ppc device-driver
i386/isa/pcf.c optional pcf device-driver
isa/psm.c optional psm device-driver
i386/isa/random_machdep.c standard
1995-03-27 19:39:58 +00:00
i386/isa/rc.c optional rc device-driver
i386/isa/rp.c optional rp device-driver
1995-03-24 18:30:11 +00:00
i386/isa/scd.c optional scd device-driver
i386/isa/si.c optional si device-driver
i386/isa/si2_z280.c optional si device-driver
i386/isa/si3_t225.c optional si device-driver
isa/sio.c optional sio device-driver
i386/isa/snd/sound.c optional pcm device-driver
i386/isa/snd/dmabuf.c optional pcm device-driver
i386/isa/snd/ad1848.c optional pcm device-driver
i386/isa/snd/sb_dsp.c optional pcm device-driver
i386/isa/snd/clones.c optional pcm device-driver
i386/isa/sound/dev_table.c optional snd device-driver
i386/isa/sound/soundcard.c optional snd device-driver
i386/isa/sound/sound_switch.c optional snd device-driver
i386/isa/sound/audio.c optional snd device-driver
i386/isa/sound/dmabuf.c optional snd device-driver
i386/isa/sound/sys_timer.c optional snd device-driver
i386/isa/sound/sequencer.c optional snd device-driver
i386/isa/sound/patmgr.c optional snd device-driver
i386/isa/sound/adlib_card.c optional opl device-driver
i386/isa/sound/opl3.c optional opl device-driver
i386/isa/sound/gus_card.c optional gus device-driver
i386/isa/sound/gus_midi.c optional gus device-driver
i386/isa/sound/gus_vol.c optional gus device-driver
i386/isa/sound/gus_wave.c optional gus device-driver
i386/isa/sound/ics2101.c optional gus device-driver
i386/isa/sound/sound_timer.c optional gus device-driver
i386/isa/sound/sound_timer.c optional css device-driver
i386/isa/sound/sound_timer.c optional mss device-driver
i386/isa/sound/midi_synth.c optional gus device-driver
i386/isa/sound/midibuf.c optional gus device-driver
i386/isa/sound/ad1848.c optional gusxvi device-driver
i386/isa/sound/ad1848.c optional gus device-driver
i386/isa/sound/ad1848.c optional mss device-driver
i386/isa/sound/ad1848.c optional css device-driver
i386/isa/sound/sound_timer.c optional mss device-driver
i386/isa/sound/midi_synth.c optional mss device-driver
i386/isa/sound/midibuf.c optional mss device-driver
i386/isa/sound/mpu401.c optional mpu device-driver
i386/isa/sound/midi_synth.c optional mpu device-driver
i386/isa/sound/midibuf.c optional mpu device-driver
i386/isa/sound/pas2_card.c optional pas device-driver
i386/isa/sound/pas2_midi.c optional pas device-driver
i386/isa/sound/pas2_mixer.c optional pas device-driver
i386/isa/sound/pas2_pcm.c optional pas device-driver
i386/isa/sound/midi_synth.c optional pas device-driver
i386/isa/sound/midibuf.c optional pas device-driver
i386/isa/sound/sb_card.c optional sb device-driver
i386/isa/sound/sb_dsp.c optional sb device-driver
i386/isa/sound/sb_midi.c optional sb device-driver
i386/isa/sound/sb_mixer.c optional sb device-driver
i386/isa/sound/midi_synth.c optional sb device-driver
i386/isa/sound/midibuf.c optional sb device-driver
i386/isa/sound/sb16_dsp.c optional sbxvi device-driver
i386/isa/sound/sb16_midi.c optional sbmidi device-driver
i386/isa/sound/uart6850.c optional uart device-driver
i386/isa/sound/midi_synth.c optional uart device-driver
i386/isa/sound/midi_synth.c optional css device-driver
i386/isa/sound/midibuf.c optional uart device-driver
i386/isa/sound/midibuf.c optional css device-driver
i386/isa/sound/trix.c optional trix device-driver
i386/isa/sound/adlib_card.c optional trix device-driver
i386/isa/sound/opl3.c optional trix device-driver
i386/isa/sound/ad1848.c optional trix device-driver
i386/isa/sound/sound_timer.c optional trix device-driver
i386/isa/sound/sscape.c optional sscape device-driver
i386/isa/sound/ad1848.c optional sscape device-driver
i386/isa/sound/sound_timer.c optional sscape device-driver
i386/isa/sound/mpu401.c optional sscape device-driver
i386/isa/sound/midi_synth.c optional sscape device-driver
i386/isa/sound/midibuf.c optional sscape device-driver
i386/isa/sound/cs4232.c optional css device-driver
i386/isa/spigot.c optional spigot device-driver
i386/isa/spkr.c optional speaker device-driver
i386/isa/stallion.c optional stl device-driver
isa/syscons_isa.c optional sc device-driver
i386/isa/vesa.c optional vga device-driver
isa/vga_isa.c optional vga device-driver
i386/isa/tw.c optional tw device-driver
i386/isa/wd.c optional wdc device-driver
i386/isa/wd.c optional wd device-driver
i386/isa/atapi.c optional wdc device-driver
i386/isa/atapi-cd.c optional wcd device-driver
1998-02-17 11:32:33 +00:00
i386/isa/wfd.c optional wfd device-driver
i386/isa/wst.c optional wst device-driver
i386/isa/wt.c optional wt device-driver
i386/linux/imgact_linux.c optional compat_linux
i386/linux/linux_dummy.c optional compat_linux
i386/linux/linux_file.c optional compat_linux
i386/linux/linux_ioctl.c optional compat_linux
i386/linux/linux_ipc.c optional compat_linux
i386/linux/linux_locore.s optional compat_linux \
dependency "linux_assym.h"
i386/linux/linux_misc.c optional compat_linux
i386/linux/linux_signal.c optional compat_linux
i386/linux/linux_socket.c optional compat_linux
i386/linux/linux_stats.c optional compat_linux
i386/linux/linux_sysent.c optional compat_linux
i386/linux/linux_sysvec.c optional compat_linux
i386/linux/linux_util.c optional compat_linux
i4b/layer1/i4b_isic.c optional isic device-driver
i4b/layer1/i4b_isic_isa.c optional isic device-driver
i4b/layer1/i4b_isic_pnp.c optional isic device-driver
i4b/layer1/i4b_isic_pci.c optional isic device-driver
i4b/layer1/i4b_isic_pcmcia.c optional isic device-driver
i4b/layer1/i4b_isac.c optional isic device-driver
i4b/layer1/i4b_hscx.c optional isic device-driver
i4b/layer1/i4b_l1.c optional isic device-driver
i4b/layer1/i4b_l1fsm.c optional isic device-driver
i4b/layer1/i4b_bchan.c optional isic device-driver
i4b/layer1/i4b_tel_s08.c optional isic device-driver
i4b/layer1/i4b_tel_s016.c optional isic device-driver
i4b/layer1/i4b_tel_s0163.c optional isic device-driver
i4b/layer1/i4b_tel_s0P.c optional isic device-driver
i4b/layer1/i4b_ctx_s0P.c optional isic device-driver
i4b/layer1/i4b_avm_a1.c optional isic device-driver
i4b/layer1/i4b_avm_fritz_pci.c optional isic device-driver
i4b/layer1/i4b_avm_fritz_pcmcia.c optional isic device-driver
i4b/layer1/i4b_usr_sti.c optional isic device-driver
i4b/layer1/i4b_itk_ix1.c optional isic device-driver
i4b/layer1/i4b_drn_ngo.c optional isic device-driver
i4b/layer1/i4b_sws.c optional isic device-driver
i4b/layer1/i4b_dynalink.c optional isic device-driver
i4b/layer1/i4b_elsa_qs1i.c optional isic device-driver
i4b/layer1/i4b_elsa_qs1p.c optional isic device-driver
libkern/bcd.c standard
libkern/divdi3.c standard
libkern/inet_ntoa.c standard
libkern/index.c standard
libkern/mcount.c optional profiling-routine
libkern/moddi3.c standard
libkern/qdivrem.c standard
libkern/qsort.c standard
libkern/random.c standard
libkern/rindex.c standard
libkern/scanc.c standard
libkern/skpc.c standard
libkern/strcat.c standard
libkern/strcmp.c standard
libkern/strcpy.c standard
libkern/strlen.c standard
libkern/strncmp.c standard
libkern/strncpy.c standard
libkern/udivdi3.c standard
libkern/umoddi3.c standard
gnu/i386/fpemul/div_small.s optional gpl_math_emulate
gnu/i386/fpemul/errors.c optional gpl_math_emulate
gnu/i386/fpemul/fpu_arith.c optional gpl_math_emulate
gnu/i386/fpemul/fpu_aux.c optional gpl_math_emulate
gnu/i386/fpemul/fpu_entry.c optional gpl_math_emulate
gnu/i386/fpemul/fpu_etc.c optional gpl_math_emulate
gnu/i386/fpemul/fpu_trig.c optional gpl_math_emulate
gnu/i386/fpemul/get_address.c optional gpl_math_emulate
gnu/i386/fpemul/load_store.c optional gpl_math_emulate
gnu/i386/fpemul/poly_2xm1.c optional gpl_math_emulate
gnu/i386/fpemul/poly_atan.c optional gpl_math_emulate
gnu/i386/fpemul/poly_div.s optional gpl_math_emulate
gnu/i386/fpemul/poly_l2.c optional gpl_math_emulate
gnu/i386/fpemul/poly_mul64.s optional gpl_math_emulate
gnu/i386/fpemul/poly_sin.c optional gpl_math_emulate
gnu/i386/fpemul/poly_tan.c optional gpl_math_emulate
gnu/i386/fpemul/polynomial.s optional gpl_math_emulate
gnu/i386/fpemul/reg_add_sub.c optional gpl_math_emulate
gnu/i386/fpemul/reg_compare.c optional gpl_math_emulate
gnu/i386/fpemul/reg_constant.c optional gpl_math_emulate
gnu/i386/fpemul/reg_div.s optional gpl_math_emulate
gnu/i386/fpemul/reg_ld_str.c optional gpl_math_emulate
gnu/i386/fpemul/reg_mul.c optional gpl_math_emulate
gnu/i386/fpemul/reg_norm.s optional gpl_math_emulate
gnu/i386/fpemul/reg_round.s optional gpl_math_emulate
gnu/i386/fpemul/reg_u_add.s optional gpl_math_emulate
gnu/i386/fpemul/reg_u_div.s optional gpl_math_emulate
gnu/i386/fpemul/reg_u_mul.s optional gpl_math_emulate
gnu/i386/fpemul/reg_u_sub.s optional gpl_math_emulate
gnu/i386/fpemul/wm_shrx.s optional gpl_math_emulate
gnu/i386/fpemul/wm_sqrt.s optional gpl_math_emulate
gnu/i386/isa/dgb.c optional dgb device-driver
gnu/i386/isa/dgm.c optional dgm device-driver
gnu/i386/isa/sound/awe_wave.c optional awe device-driver
pci/es1370.c optional pcm device-driver
Add support for busmaster DMA on some PCI IDE chipsets. I changed a few bits here and there, mainly renaming wd82371.c to ide_pci.c now that it's supposed to handle different chipsets. It runs on my P6 natoma board with two Maxtor drives, and also on a Fujitsu machine I have at work with an Opti chipset and a Quantum drive. Submitted by:cgull@smoke.marlboro.vt.us <John Hood> Original readme: *** WARNING *** This code has so far been tested on exactly one motherboard with two identical drives known for their good DMA support. This code, in the right circumstances, could corrupt data subtly, silently, and invisibly, in much the same way that older PCI IDE controllers do. It's ALPHA-quality code; there's one or two major gaps in my understanding of PCI IDE still. Don't use this code on any system with data that you care about; it's only good for hack boxes. Expect that any data may be silently and randomly corrupted at any moment. It's a disk driver. It has bugs. Disk drivers with bugs munch data. It's a fact of life. I also *STRONGLY* recommend getting a copy of your chipset's manual and the ATA-2 or ATA-3 spec and making sure that timing modes on your disk drives and IDE controller are being setup correctly by the BIOS-- because the driver makes only the lamest of attempts to do this just now. *** END WARNING *** that said, i happen to think the code is working pretty well... WHAT IT DOES: this code adds support to the wd driver for bus mastering PCI IDE controllers that follow the SFF-8038 standard. (all the bus mastering PCI IDE controllers i've seen so far do follow this standard.) it should provide busmastering on nearly any current P5 or P6 chipset, specifically including any Intel chipset using one of the PIIX south bridges-- this includes the '430FX, '430VX, '430HX, '430TX, '440LX, and (i think) the Orion '450GX chipsets. specific support is also included for the VIA Apollo VP-1 chipset, as it appears in the relabeled "HXPro" incarnation seen on cheap US$70 taiwanese motherboards (that's what's in my development machine). it works out of the box on controllers that do DMA mode2; if my understanding is correct, it'll probably work on Ultra-DMA33 controllers as well. it'll probably work on busmastering IDE controllers in PCI slots, too, but this is an area i am less sure about. it cuts CPU usage considerably and improves drive performance slightly. usable numbers are difficult to come by with existing benchmark tools, but experimentation on my K5-P90 system, with VIA VP-1 chipset and Quantum Fireball 1080 drives, shows that disk i/o on raw partitions imposes perhaps 5% cpu load. cpu load during filesystem i/o drops a lot, from near 100% to anywhere between 30% and 70%. (the improvement may not be as large on an Intel chipset; from what i can tell, the VIA VP-1 may not be very efficient with PCI I/O.) disk performance improves by 5% or 10% with these drives. real, visible, end-user performance improvement on a single user machine is about nil. :) a kernel compile was sped up by a whole three seconds. it *does* feel a bit better-behaved when the system is swapping heavily, but a better disk driver is not the fix for *that* problem. THE CODE: this code is a patch to wd.c and wd82371.c, and associated header files. it should be considered alpha code; more work needs to be done. wd.c has fairly clean patches to add calls to busmaster code, as implemented in wd82371.c and potentially elsewhere (one could imagine, say, a Mac having a different DMA controller). wd82371.c has been considerably reworked: the wddma interface that it presents has been changed (expect more changes), many bugs have been fixed, a new internal interface has been added for supporting different chipsets, and the PCI probe has been considerably extended. the interface between wd82371.c and wd.c is still fairly clean, but i'm not sure it's in the right place. there's a mess of issues around ATA/ATAPI that need to be sorted out, including ATAPI support, CD-ROM support, tape support, LS-120/Zip support, SFF-8038i DMA, UltraDMA, PCI IDE controllers, bus probes, buggy controllers, controller timing setup, drive timing setup, world peace and kitchen sinks. whatever happens with all this and however it gets partitioned, it is fairly clear that wd.c needs some significant rework-- probably a complete rewrite. timing setup on disk controllers is something i've entirely punted on. on my development machine, it appears that the BIOS does at least some of the necessary timing setup. i chose to restrict operation to drives that are already configured for Mode4 PIO and Mode2 multiword DMA, since the timing is essentially the same and many if not most chipsets use the same control registers for DMA and PIO timing. does anybody *know* whether BIOSes are required to do timing setup for DMA modes on drives under their care? error recovery is probably weak. early on in development, i was getting drive errors induced by bugs in the driver; i used these to flush out the worst of the bugs in the driver's error handling, but problems may remain. i haven't got a drive with bad sectors i can watch the driver flail on. complaints about how wd82371.c has been reindented will be ignored until the FreeBSD project has a real style policy, there is a mechanism for individual authors to match it (indent flags or an emacs c-mode or whatever), and it is enforced. if i'm going to use a source style i don't like, it would help if i could figure out what it *is* (style(9) is about half of a policy), and a way to reasonably duplicate it. i ended up wasting a while trying to figure out what the right thing to do was before deciding reformatting the whole thing was the worst possible thing to do, except for all the other possibilities. i have maintained wd.c's indentation; that was not too hard, fortunately. TO INSTALL: my dev box is freebsd 2.2.2 release. fortunately, wd.c is a living fossil, and has diverged very little recently. included in this tarball is a patch file, 'otherdiffs', for all files except wd82371.c, my edited wd82371.c, a patch file, 'wd82371.c-diff-exact', against the 2.2.2 dist of 82371.c, and another patch file, 'wd82371.c-diff-whitespace', generated with diff -b (ignore whitespace). most of you not using 2.2.2 will probably have to use this last patchfile with 'patch --ignore-whitespace'. apply from the kernel source tree root. as far as i can tell, this should apply cleanly on anything from -current back to 2.2.2 and probably back to 2.2.0. you, the kernel hacker, can figure out what to do from here. if you need more specific directions, you probably should not be experimenting with this code yet. to enable DMA support, set flag 0x2000 for that drive in your config file or in userconfig, as you would the 32-bit-PIO flag. the driver will then turn on DMA support if your drive and controller pass its tests. it's a bit picky, probably. on discovering DMA mode failures or disk errors or transfers that the DMA controller can't deal with, the driver will fall back to PIO, so it is wise to setup the flags as if PIO were still important. 'controller wdc0 at isa? port "IO_WD1" bio irq 14 flags 0xa0ffa0ff vector wdintr' should work with nearly any PCI IDE controller. i would *strongly* suggest booting single-user at first, and thrashing the drive a bit while it's still mounted read-only. this should be fairly safe, even if the driver goes completely out to lunch. it might save you a reinstall. one way to tell whether the driver is really using DMA is to check the interrupt count during disk i/o with vmstat; DMA mode will add an extremely low number of interrupts, as compared to even multi-sector PIO. boot -v will give you a copious register dump of timing-related info on Intel and VIAtech chipsets, as well as PIO/DMA mode information on all hard drives. refer to your ATA and chipset documentation to interpret these. WHAT I'D LIKE FROM YOU and THINGS TO TEST: reports. success reports, failure reports, any kind of reports. :) send them to cgull+ide@smoke.marlboro.vt.us. i'd also like to see the kernel messages from various BIOSes (boot -v; dmesg), along with info on the motherboard and BIOS on that machine. i'm especially interested in reports on how this code works on the various Intel chipsets, and whether the register dump works correctly. i'm also interested in hearing about other chipsets. i'm especially interested in hearing success/failure reports for PCI IDE controllers on cards, such as CMD's or Promise's new busmastering IDE controllers. UltraDMA-33 reports. interoperation with ATAPI peripherals-- FreeBSD doesn't work with my old Hitachi IDE CDROM, so i can't tell if I've broken anything. :) i'd especially like to hear how the drive copes in DMA operation on drives with bad sectors. i haven't been able to find any such yet. success/failure reports on older IDE drives with early support for DMA modes-- those introduced between 1.5 and 3 years ago, typically ranging from perhaps 400MB to 1.6GB. failure reports on operation with more than one drive would be appreciated. the driver was developed with two drives on one controller, the worst-case situation, and has been tested with one drive on each controller, but you never know... any reports of messages from the driver during normal operation, especially "reverting to PIO mode", or "dmaverify odd vaddr or length" (the DMA controller is strongly halfword oriented, and i'm curious to know if any FreeBSD usage actually needs misaligned transfers). performance reports. beware that bonnie's CPU usage reporting is useless for IDE drives; the best test i've found has been to run a program that runs a spin loop at an idle priority and reports how many iterations it manages, and even that sometimes produces numbers i don't believe. performance reports of multi-drive operation are especially interesting; my system cannot sustain full throughput on two drives on separate controllers, but that may just be a lame motherboard. THINGS I'M STILL MISSING CLUE ON: * who's responsible for configuring DMA timing modes on IDE drives? the BIOS or the driver? * is there a spec for dealing with Ultra-DMA extensions? * are there any chipsets or with bugs relating to DMA transfer that should be blacklisted? * are there any ATA interfaces that use some other kind of DMA controller in conjunction with standard ATA protocol? FINAL NOTE: after having looked at the ATA-3 spec, all i can say is, "it's ugly". *especially* electrically. the IDE bus is best modeled as an unterminated transmission line, these days. for maximum reliability, keep your IDE cables as short as possible and as few as possible. from what i can tell, most current chipsets have both IDE ports wired into a single buss, to a greater or lesser degree. using two cables means you double the length of this bus. SCSI may have its warts, but at least the basic analog design of the bus is still somewhat reasonable. IDE passed beyond the veil two years ago. --John Hood, cgull@smoke.marlboro.vt.us
1997-07-29 12:57:25 +00:00
pci/ide_pci.c optional wd device-driver