sys/modules/drmkms: Remove GPU scheduler files.

These have been moved out to drmkms_sched.kmod.

XXX pullup-10

branches: 1.18.4;
drm: Include GPU scheduler in drmkms.kmod.

Could be split into a separate module, but whatever.

drm: Sync module/drmkms/Makefile with files.drmkms.

Unconditionally include legacy APIs for viadrmums.

drm: Dust off module build a little.

drm: Sync (device-independent) drmkms*.kmod makefiles.

build the drmkms modules with -fwrapv too

branches: 1.13.10; 1.13.14;
Carry new CWARNFLAGS over to module reachover makefiles.

Forgot these modules existed!

branches: 1.12.6;
Bump default value of WARNS for modules from 3 to 5, and
explicitly set WARNS for modules that fail with WARNS=5.

Also, turn on -Wno-missing-noreturn for clang for some files.

At the moment, among ~ 360 modules,
- 2 (lua and zfs) need WARNS=0
- 1 (solaris) needs WARNS=1
- 136 need WARNS=3 (mostly due to sign-compare)
- 4 need WARNS=4
- others can be compiled with WARNS=5

Discussed on tech-kern.

Rework PCI and AGP conditionalization.

- Push drm_pci_set_unique into driver callback.
- Eliminate drm_pci_set_unique_hook.
- Gather all drm_agp_* functions into struct drm_agp_hooks.
- Replace the nonsensical old atomic garbage by serious locking.
- Make drm_agpsupport.c its own module.
- Eliminate NDRMKMS_PCI.
- Use NAGP from "agp.h" only in drm_module.c for horrible hack.
=> See comment in file for rationale.
- Always define CONFIG_PCI=1 and CONFIG_AGP=1.
- Always go through the drm_agp_* function hooks.
- Ifdef out nouveau agp stuff that doesn't go through drm_agp_*
for reasons that I'm too frustrated to figure out tonight.
- pci_iomap no longer automagically does agp_i810_borrow.
=> Use drm_agp_borrow instead.

Make drmkms.kmod build again on amd64.

branches: 1.9.16; 1.9.18;
Factor generic parts of intelfb out into a drmfb.

Adapting radeondrmkmsfb should not be hard.

This will make nouveaufb easier too.

Rewrite drm_encoder_slave.c, as nouveau will need.

branches: 1.7.2;
Move all PCI/AGP code back to drmkms_pci module where it belongs.

this module needs MKLDSCRIPT too now

make this work: add agpsupport and sysctl code

fix build failure.

> /tmp/bracket/build/2014.11.10.22.43.46-i386/src/sys/external/bsd/drm2/include/linux/pci.h:36:20: fatal error: acpica.h: No such file or directory

branches: 1.3.2; 1.3.4;
Make it build and boot on my test machines.

Screen blanks on boot on the Ivy Bridge system with

DRM error in cpt_serr_int_handler: PCH transcoder A FIFO underrun

But after that everything is OK. Appears to be an upstream problem.
To investigate...

I think there's a cache flushing issue somewhere -- there are little
display artefacts on my T60.

branches: 1.2.2; 1.2.4; 1.2.6;
Merge riastradh-drm2 to HEAD.

branches: 1.1.2;
file Makefile was initially added on branch riastradh-drm2.

drm: Undefine `alpha' in the module build too.

drm: Sync module/drmkms/Makefile with files.drmkms.

Unconditionally include legacy APIs for viadrmums.

drm: Dust off module build a little.

drm: Sync (device-independent) drmkms*.kmod makefiles.

Make drmkms.kmod build again on amd64.

branches: 1.4.4; 1.4.28; 1.4.30;
Make it build and boot on my test machines.

Screen blanks on boot on the Ivy Bridge system with

DRM error in cpt_serr_int_handler: PCH transcoder A FIFO underrun

But after that everything is OK. Appears to be an upstream problem.
To investigate...

I think there's a cache flushing issue somewhere -- there are little
display artefacts on my T60.

branches: 1.3.2; 1.3.4; 1.3.6;
Make drmkms find header files from sys/external/bsd/common.

Merge riastradh-drm2 to HEAD.

branches: 1.1.2;
file Makefile.inc was initially added on branch riastradh-drm2.

branches: 1.1.2; 1.1.6;
Rework PCI and AGP conditionalization.

- Push drm_pci_set_unique into driver callback.
- Eliminate drm_pci_set_unique_hook.
- Gather all drm_agp_* functions into struct drm_agp_hooks.
- Replace the nonsensical old atomic garbage by serious locking.
- Make drm_agpsupport.c its own module.
- Eliminate NDRMKMS_PCI.
- Use NAGP from "agp.h" only in drm_module.c for horrible hack.
=> See comment in file for rationale.
- Always define CONFIG_PCI=1 and CONFIG_AGP=1.
- Always go through the drm_agp_* function hooks.
- Ifdef out nouveau agp stuff that doesn't go through drm_agp_*
for reasons that I'm too frustrated to figure out tonight.
- pci_iomap no longer automagically does agp_i810_borrow.
=> Use drm_agp_borrow instead.

Make it build and boot on my test machines.

Screen blanks on boot on the Ivy Bridge system with

DRM error in cpt_serr_int_handler: PCH transcoder A FIFO underrun

But after that everything is OK. Appears to be an upstream problem.
To investigate...

I think there's a cache flushing issue somewhere -- there are little
display artefacts on my T60.

branches: 1.2.2; 1.2.4; 1.2.6;
Merge riastradh-drm2 to HEAD.

branches: 1.1.2;
file drmkms.ioconf was initially added on branch riastradh-drm2.

branches: 1.1.8;
drmkms: Fix module build.