CVS log for src/sys/external/bsd/drm2/dist/drm/drm_gem.c

Up to [cvs.NetBSD.org] / src / sys / external / bsd / drm2 / dist / drm

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Pull up following revision(s) (requested by rin in ticket #928):

	sys/external/bsd/drm2/dist/drm/drm_gem.c: revision 1.25
	sys/external/bsd/drm2/dist/drm/radeon/radeon_ci_dpm.c: revision 1.7
	sys/external/bsd/drm2/dist/drm/nouveau/nvkm/engine/device/priv.h: revision 1.4
	sys/external/bsd/drm2/dist/drm/nouveau/nvkm/engine/device/nouveau_nvkm_engine_device_acpi.c: revision 1.4
	sys/external/bsd/drm2/dist/drm/i915/display/intel_opregion.h: revision 1.6
	sys/external/bsd/drm2/dist/drm/i915/i915_drv.h: revision 1.49
	sys/external/bsd/drm2/include/linux/mxm-wmi.h: revision 1.1
	sys/external/bsd/drm2/dist/drm/nouveau/nvkm/subdev/pci/nouveau_nvkm_subdev_pci_pcie.c: revision 1.4
	sys/external/bsd/drm2/dist/drm/nouveau/nvkm/engine/device/nouveau_nvkm_engine_device_base.c: revision 1.13
	sys/external/bsd/common/include/linux/bitops.h: revision 1.17
	sys/external/bsd/drm2/nouveau/files.nouveau: revision 1.40
	sys/external/bsd/drm2/linux/linux_pci.c: revision 1.30
	sys/external/bsd/drm2/dist/drm/radeon/radeon_drv.h: revision 1.5
	sys/external/bsd/drm2/dist/drm/nouveau/nvkm/subdev/pci/nouveau_nvkm_subdev_pci_pcie.c: revision 1.5
	sys/external/bsd/drm2/dist/drm/nouveau/nvkm/subdev/mxm/nouveau_nvkm_subdev_mxm_base.c: revision 1.5
	sys/external/bsd/drm2/dist/drm/amd/amdgpu/amdgpu_gart.c: revision 1.12
	sys/external/bsd/drm2/dist/drm/radeon/radeon_rv770.c: revision 1.3
	sys/external/bsd/drm2/dist/drm/nouveau/nvkm/engine/disp/nouveau_nvkm_engine_disp_sorgm200.c: revision 1.3
	sys/external/bsd/common/include/linux/printk.h: revision 1.14
	sys/external/bsd/drm2/dist/drm/nouveau/nvkm/subdev/instmem/nouveau_nvkm_subdev_instmem_gk20a.c: revision 1.10
	sys/external/bsd/drm2/dist/drm/amd/amdgpu/amdgpu_vi.c: revision 1.4
	sys/external/bsd/drm2/include/linux/acpi.h: revision 1.11
	sys/external/bsd/drm2/drm/drm_cdevsw.c: revision 1.31
	sys/external/bsd/drm2/dist/drm/radeon/radeon_si.c: revision 1.6
	sys/external/bsd/drm2/dist/drm/nouveau/nouveau_acpi.c: revision 1.5
	sys/external/bsd/drm2/dist/drm/i915/display/intel_acpi.h: revision 1.5
	sys/external/bsd/drm2/include/acpi/video.h: revision 1.3
	sys/external/bsd/drm2/dist/drm/radeon/radeon_evergreen.c: revision 1.6
	sys/external/bsd/drm2/dist/drm/nouveau/nouveau_acpi.h: revision 1.4
	sys/arch/sparc64/include/pci_machdep.h: revision 1.31
	sys/arch/sparc64/dev/pci_machdep.c: revision 1.83
	sys/external/bsd/drm2/include/linux/kref.h: revision 1.14
	sys/external/bsd/drm2/dist/drm/nouveau/nvkm/engine/device/nouveau_nvkm_engine_device_pci.c: revision 1.12
	sys/external/bsd/drm2/linux/linux_dma_buf.c: revision 1.17
	sys/external/bsd/drm2/dist/drm/nouveau/nvkm/subdev/bios/nouveau_nvkm_subdev_bios_shadowacpi.c: revision 1.4
	sys/external/bsd/drm2/drm/drm_module.c: revision 1.32
	sys/external/bsd/drm2/dist/drm/i915/i915_gem.h: revision 1.8
	sys/external/bsd/drm2/dist/drm/i915/gem/i915_gem_dmabuf.c: revision 1.7
	sys/external/bsd/drm2/include/linux/smp.h: revision 1.5
	sys/external/bsd/drm2/dist/drm/amd/amdgpu/amdgpu_si.c: revision 1.5
	sys/external/bsd/drm2/dist/drm/amd/amdgpu/amdgpu_device.c: revision 1.20
	sys/arch/x86/x86/bus_dma.c: revision 1.91
	sys/external/bsd/drm2/radeon/files.radeon: revision 1.40
	sys/external/bsd/drm2/include/acpi/acpi_bus.h: revision 1.1
	sys/external/bsd/drm2/dist/drm/nouveau/nouveau_drv.h: revision 1.5
	sys/external/bsd/drm2/dist/drm/amd/amdgpu/amdgpu_device.c: revision 1.21
	sys/external/bsd/common/include/asm/barrier.h: revision 1.20
	sys/external/bsd/drm2/include/linux/nbsd-namespace-acpi.h: revision 1.2
	sys/external/bsd/common/include/asm/barrier.h: revision 1.21
	sys/modules/drmkms/drmkms_pci.h: revision 1.1
	sys/external/bsd/drm2/dist/drm/drm_dp_helper.c: revision 1.17
	sys/external/bsd/drm2/radeon/radeon_pci.c: revision 1.23
	sys/external/bsd/drm2/linux/linux_xa.c: revision 1.4
	sys/external/bsd/drm2/ttm/ttm_bo_vm.c: revision 1.23
	sys/external/bsd/drm2/ttm/ttm_bo_vm.c: revision 1.24
	sys/external/bsd/drm2/ttm/ttm_bo_vm.c: revision 1.25
	sys/external/bsd/drm2/linux/linux_pci.c: revision 1.26
	sys/dev/pci/pcivar.h: revision 1.120
	sys/arch/xen/include/pci_machdep.h: revision 1.24
	sys/external/bsd/drm2/ttm/ttm_bo_vm.c: revision 1.26
	sys/external/bsd/drm2/linux/linux_pci.c: revision 1.27
	sys/external/bsd/drm2/ttm/ttm_bo_vm.c: revision 1.27
	sys/external/bsd/drm2/linux/linux_pci.c: revision 1.28
	sys/external/bsd/drm2/dist/drm/radeon/radeon_cik.c: revision 1.8
	sys/external/bsd/drm2/ttm/ttm_bo_vm.c: revision 1.28
	sys/external/bsd/drm2/linux/linux_pci.c: revision 1.29
	sys/external/bsd/drm2/include/linux/pci.h: revision 1.57
	sys/external/bsd/drm2/include/linux/pci.h: revision 1.58
	sys/external/bsd/drm2/dist/drm/radeon/radeon_acpi.c: revision 1.5
	sys/external/bsd/drm2/dist/drm/nouveau/nouveau_display.c: revision 1.6
	sys/external/bsd/drm2/dist/drm/amd/powerplay/hwmgr/amdgpu_hwmgr.c: revision 1.3
	sys/external/bsd/drm2/dist/drm/amd/display/dc/core/amdgpu_dc_stream.c: revision 1.3
	share/man/man9/bus_dma.9: revision 1.69
	sys/external/bsd/drm2/drm/drm_gem_cma_helper.c: revision 1.15
	sys/external/bsd/drm2/dist/drm/radeon/radeon_acpi.c: revision 1.6
	sys/external/bsd/drm2/dist/drm/radeon/radeon.h: revision 1.12
	sys/external/bsd/drm2/dist/drm/amd/amdgpu/amdgpu_cik.c: revision 1.7
	sys/dev/acpi/acpi_mcfg.c: revision 1.29
	sys/external/bsd/drm2/dist/drm/amd/amdgpu/amdgpu_acpi.c: revision 1.6
	sys/external/bsd/drm2/dist/drm/radeon/radeon_r600.c: revision 1.7
	sys/external/bsd/drm2/dist/drm/radeon/radeon_bios.c: revision 1.13
	sys/modules/amdgpu/Makefile: revision 1.9
	sys/external/bsd/drm2/dist/drm/radeon/radeon_bios.c: revision 1.14
	sys/external/bsd/common/linux/linux_tasklet.c: revision 1.12
	sys/external/bsd/drm2/dist/drm/nouveau/include/nvkm/core/device.h: revision 1.10
	sys/external/bsd/drm2/dist/drm/i915/gem/i915_gem_mman.c: revision 1.23
	sys/external/bsd/drm2/dist/drm/amd/amdgpu/amdgpu.h: revision 1.9
	sys/external/bsd/drm2/include/linux/interval_tree.h: revision 1.14
	sys/external/bsd/drm2/dist/drm/i915/gem/i915_gem_mman.c: revision 1.26
	sys/external/bsd/drm2/dist/drm/amd/powerplay/hwmgr/amdgpu_smu7_hwmgr.c: revision 1.5
	sys/dev/pci/pci.c: revision 1.168
	sys/external/bsd/drm2/dist/drm/i915/gem/i915_gem_mman.c: revision 1.27
	sys/external/bsd/drm2/dist/drm/radeon/radeon_si_dpm.c: revision 1.9
	sys/external/bsd/drm2/pci/files.drmkms_pci: revision 1.18
	sys/external/bsd/drm2/linux/linux_sync_file.c: revision 1.3
	sys/external/bsd/drm2/amdgpu/files.amdgpu: revision 1.31
	sys/external/bsd/drm2/dist/drm/nouveau/nvkm/engine/device/nouveau_nvkm_engine_device_tegra.c: revision 1.4
	sys/external/bsd/drm2/dist/drm/drm_gem.c: revision 1.24
	sys/arch/xen/xen/xpci_xenbus.c: revision 1.29

drm: Eliminate __HAVE_ATOMIC_AS_MEMBAR conditionals.
Discussed on tech-kern:
https://mail-index.netbsd.org/tech-kern/2023/02/23/msg028729.html

linux asm/barrier.h: Fix !MULTIPROCESSOR build.

remove "nouveau" from a comment.  noted by jmcneill.

drm: KASSERT(A && B) -> KASSERT(A); KASSERT(B)
comment a function that has a clear overbounds read but it isn't used.
found by GCC 12.

nix the NetBSD specific GEM_BUG_ON().
avoids GCC 12 warnings, and matches upstream closer.
avoid uninitialised variable usage in drm_gem_cma_create_internal().
in the case nothing has returned 'error', 'nsegs' and the dma info
are (potentially) uninitialised, so consider this an error.
found by GCC 12.

avoid a GCC 12 warning.
there's a 1-element long array and a loop conditional that tries to see
if indexes for it are not identical.  as these indexes will always both
be 0, the only valid index, the condition is always false.  GCC 12
triggers a strange warning on this code that can never run (see below),
so simply assert the array size is 1 and comment the rest.
amdgpu_dc_stream.c:470:55: error: array subscript [0, 0] is outside array bounds of 'struct dc_writeback_info[1]' [-Werror=array-bounds]
  470 |                                 stream->writeback_info[j] = stream->writeback_info[i];

convert a KASSERT() into an if () panic() sequence to appease GCC 12.
OK riastradh@.

drm: Fix conditionals around drmkms_pci and agp.
Kernel should build now with all pci drm drivers stripped out but
DRM_LEGACY still enabled.  (Might not be very useful, but it'll
build.  Maybe we should also have DRM_LEGACY_PCI so those drivers can
be modloaded later.)

drmkms: Fix module build.
avoid an unlikely array bounds issue picked up by GCC 12.
nvkm_pcie_speed() can return -1, which is then used as an array index,
so make this default return PCIe 1.0 speeds.

drm: enable almost all PCIe functionality
linux_pci.c revisions 1.24 and 1.25 implemented most of the remaining
missing PCIe backends, but only enabled them for some amdgpu portions.
this enables all code marked with "XXX amdgpu pcie", "XXX radeon pcie",
and "XXX pcie speed".  for most of it, simply removing #ifndefs __NetBSD__
to enable compliation was required, once the new "bus->max_bus_speed"
member was added to struct pci_bus.  add an "always fails" backend for
pci_enable_atomic_ops_to_root() which seems to only be necessary
for virtual GPU functionality (and could be implemented if needed.)
tested on radeon 5450, 7750, R7 240 [radeon], and RX 550 [amdgpu], and
nvidia 750 and 1030 [nouveau].
this still does not quite work on nvidia cards.  there are two problems
that remain:
- the call to set the link speed is skipped because the speed is set
  to the default value of "-1".  nvkm_pcie_set_link() will actually
  determine the right value for this and for some cards, calling this
  function if the current speed is -1 helps set the link speed.  it
  may be that on linux other paths we don't have enabled properly
  would set this (there's one via debugfs, and a jetson specific one,
  though perhaps setting either AC or DC speed values as boot options
  (after hooking up these for netbsd) would currently work.
- worse, cards newer than kepler - geforce 900, 1000, and newer, are
  all lacking the backing support to set pcie link speed.  the GT 1030
  card i have been testing with remains at pcie 1.0.

radeon: fix and enable ACPI methods for getting ROM BIOS
The hacky way of getting the BIOS mapped only works on x86. ACPI
should be preferred if available. Makes BIOS reading though VFCT
work on aarch64 with EDK2. (But only if EDK2 has POSTed the GPU.)
XXX amdgpu should get the same treatment.

drm: put_cpu() should enable preemption, not disable it again

drm(4): make pr_debug equivalent to aprint_debug
significantly reduces the default spam from amdgpu(4).

drm: Set CONFIG_ACPI in linux/acpi.h and make it build.

Leave a little ACPI-related functionality disabled for now, like
getting EDID out of ACPI -- needs a bit more work to make this work,
and I don't have hardware to work on that.
Should help with failures of the forms:
- unable to locate a BIOS ROM
- bios: unable to locate usable image
on various machines.

radeon_acpi.c: ifdef out unused function on NetBSD.
Should fix syzkaller build.

drm(4): Fix st_rdev in stat.
dminor->index already has the 64*type adjustment, as allocated in
drm_minor_alloc.
PR kern/58180

linux_sync_file: Fix missing init/fini steps.
Noted by rjs@.
PR kern/58210

ttm: Sync ttm_bo_uvm_fault_idle better with Linux.
PR xsrc/58133
ttm: Undo mistake in previous.

PR xsrc/58133
linux: Add a few more cases to pci_get_class.
Should fix crash on boot with amdgpu now that the ACPI business is
enabled.

i915: Fix dmabuf mmap object.

drm: Fix missing bounds checks in dma buf mmap.

drm_gem.c: Fix sense of assertion.
This is the opposite of WARN_ON.
Noted by rjs@.

drm_gem.c: Enable drm_gem_fence_array_add now that we emulate xa.
linux_xa: Delete and replace collision in xa_store as intended.
Don't free the colliding node that's still in the tree.
Noted by rjs@.

i915_gem_mman.c: Apply mmap types via pmap flags.
This way, userland gets buffers mapped write-combining or uncached as
needed.
PR xsrc/58307

x86: Teach bus_dmamem_map about BUS_DMA_PREFETCHABLE.
PR port-amd64/58308

bus_dma(9): Document BUS_DMA_PREFETCHABLE.
Like BUS_DMA_NOCACHE.  Doesn't absolve you of the need for
bus_dmamap_sync, but if you later pass the vaddr to bus_dmamap_load,
the DMA map might notice the mapping is write-combining and use this
to make bus_dmamap_sync cheaper.
PR kern/58309

nouveau_nvkm_subdev_instmem_gk20a.c: Use BUS_DMA_PREFETCHABLE.
Matches Linux's pgprot_writecombine.
Unclear where the appropriate bus_dmamap_sync happens, or is supposed
to happen -- not using it would be wrong, but asking for a
prefetchable mapping may paper over symptoms, at least!

ttm: Sync more with Linux.
Add the original copyright and attribution since this is now,
intentionally, a modified copy of the original and not just roughly
the same algorithm.

ttm: Respect PGO_ALLPAGES.
Not sure this is useful but it reduces XXX's and makes this match
udv_fault better so it's easier to understand.

ttm: Sync cacheability flag logic with Linux.

ttm: Add XXX about readahead fault failures.

pci: Pass cookie through pci_find_device, pci_enumerate_bus, take 2.
New functions pci_find_device1 and pci_enumerate_bus1 have the cookie
argument.  Existing symbols pci_find_device and pci_enumerate_bus are
now wrappers for the cookieless version.
This will allow pci_find_device callers to pass a cookie through to
the match function so they can keep state or pass in extra parameters
like b/d/f numbers, which will allow us to nix some horrible kludges
in the Linux PCI API emulation for drm (and, perhaps, Intel wifi).
This change drops the symbol pci_probe_device, in favour of a new
pci_probe_device1 with the cookie argument.  But I don't think that
requires a revbump because it's only called by MD pci_enumerate_bus1
implementations, which don't live in modules anyway.
Take 2: Make sure to handle NULL match function.
linux_pci: Nix pci enumeration kludges.
Now that we can pass a cookie through, this stuff will be a little
less fragile.

i915: Omit needless i915_gem_object_pin/unpin_pages cycle in fault.
vm_fault_cpu and vm_fault_gtt, called by i915_gem_fault, already do
the pinning and unpinning internally, so there is no need for
i915_gem_fault to do it.
No functional change intended, except that the transient pin count
will be one lower than before during the fault routine (but it will
still be positive).

i915: Match Linux fault routine return code actions.
Omit needless EINTR interception -- this is now handled by
i915_error_to_vmf_fault.
Earlier revert was over a false alarm -- bisection shows the new
warnings arose from linux_pci.c 1.29 here:
https://mail-index.netbsd.org/source-changes/2024/06/23/msg151929.html

linux_pci: Fix shifto in pci_get_class.
It looks like Linux's pci_get_class also matches the interface part
of the PCI class register (but not the revision part), and I hadn't
noticed that in the previous shim structured differently.

With GCC12 kernel ALL/amd64 triggers "'sor' may be used uninitialized".
If "sublinks & 3" is zero GCC is right and sor[1] may be returned unitialized.
Fix by initializing "sor" to zero to return -1 instead of uninitialized value.
Ok: Taylor R Campbell <riastradh@>

amdgpu: Map BAR 2, not BAR 5, on pre-bonaire chips.
PR kern/58384

amdgpu: Map consecutive pages, not the same one over and over again.
PR kern/58385

linux/bitops: Fix overestimate for BITS_TO_LONGS(9)
Fortunately, this seems harmless except for allocating
excessive buffer memory.
Pointed out by nonaka@, OK riastradh@.

drm_gem.c: Enable drm_gem_fence_array_add now that we emulate xa.

drm_gem.c: Fix sense of assertion.

This is the opposite of WARN_ON.

Noted by rjs@.

drm: Destroy struct drm_gem_object::vma_node after use.

drm: Nix use of uvm pglist.  Just use arrays of page pointers.

drm/gem: Comment obscure constant parameters.

drm/gem: Narrow scope of #ifdef __NetBSD__.

Need to initialize this resv.

Disable the functions that rely on xarray for now.

Not currently used anyway.

Ifdef out Linux-only definition.

Sync drm_gem_get_pages: drm_malloc_ab -> kvmalloc_array.

Merge linux-drm-v5-6-rc3

Import drm from Linux v5.6-rc3 (commit f8788d86ab28f61f7b46eb6be375f8a726783636)

    drivers/gpu/drm     -> sys/external/bsd/drm2/dist/drm
    include/drm         -> sys/external/bsd/drm2/dist/include/drm
    include/uapi/drm    -> sys/external/bsd/drm2/dist/include/uapi/drm

GPL exclusions in dist/drm:

- amd/amdgpu/amdgpu_atpx_handler.c
- arc/
- arm/
- armada/
- aspeed/
- atmel-hlcdc/
- bochs/
- bridge/
- cirrus/
- drm_dp_cec.c
- drm_dp_mst_topology_internal.h
- drm_edid_load.c
- drm_format_helper.c
- drm_gem_cma_helper.c
- drm_gem_framebuffer_helper.c
- drm_gem_shmem_helper.c
- drm_gem_ttm_helper.c
- drm_gem_vram_helper.c
- drm_hdcp.c
- drm_lease.c
- drm_mipi_dbi.c
- drm_simple_kms_helper.c
- drm_sysfs.c
- drm_trace.h
- drm_vram_helper_common.c
- drm_writeback.c
- etnaviv/
- exynos/
- fsl-dcu/
- gma500/
- hisilicon/
- i2c/tda9950.c
- i2c/tda998x_drv.c
- i915/gt/selftest_context.c
- i915/gt/selftest_engine.c
- i915/gt/selftest_engine.h
- i915/gt/selftest_engine_cs.c
- i915/gt/selftest_engine_pm.c
- i915/i915_trace.h
- i915/selftests/i915_live_selftests.h
- i915/selftests/i915_mock_selftests.h
- i915/selftests/i915_perf_selftests.h
- i915/selftests/lib_sw_fence.h
- imx/
- ingenic/
- lima/
- mcde/
- mediatek/
- meson/
- mgag200/
- msm/
- mxsfb/
- omapdrm/
- panel/
- panfrost/
- pl111/
- radeon/radeon_atpx_handler.c
- rcar-du/
- rockchip/
- selftests/drm_cmdline_selftests.h
- selftests/drm_modeset_selftests.h
- selftests/test-drm_cmdline_parser.c
- selftests/test-drm_damage_helper.c
- selftests/test-drm_dp_mst_helper.c
- selftests/test-drm_format.c
- selftests/test-drm_framebuffer.c
- selftests/test-drm_modeset_common.c
- selftests/test-drm_modeset_common.h
- selftests/test-drm_plane_helper.c
- selftests/test-drm_rect.c
- shmobile/
- sti/
- stm/
- sun4i/
- tegra/
- tilcdc/
- tiny/
- tve200/
- udl/
- v3d/
- vc4/
- virtio/virtgpu_trace.h
- virtio/virtgpu_trace_points.c
- vkms/
- vmwgfx/device_include/vmware_pack_begin.h
- vmwgfx/device_include/vmware_pack_end.h
- zte/

  Exceptions -- these all appear to be files to which someone added
  an SPDX license header automatically by a script that is not aware
  of the default MIT licensing under drivers/gpu/drm:

  - ast/ast_dp501.c
  - ast/ast_dram_tables.h
  - lib/drm_random.c
  - lib/drm_random.h
  - i915/display/intel_acpi.c
  - i915/selftests/mock_gem_device.h
  - i915/selftests/i915_mock_selftests.h
  - i915/selftests/i915_live_selftests.h
  - r128/ati_pcigart.h
  - selftests/drm_mm_selftests.h
  - selftests/test-drm_mm.c
  - vmwgfx/device_include/vm_basic_types.h

GPL exclusions in dist/include/drm:

- bridge
- drm_client.h
- drm_fb_cma_helper.h
- drm_format_helper.h
- drm_gem_cma_helper.h
- drm_gem_shmem_helper.h
- drm_gem_ttm_helper.h
- drm_gem_vram_helper.h
- drm_lease.h
- drm_mipi_dbi.h
- drm_mipi_dsi.h
- drm_of.h
- drm_simple_kms_helper.h
- drm_sysfs.h
- drm_writeback.h
- gma_drm.h
- i2c/tda998x.h
- i915_mei_hdcp_interface.h
- intel-gtt.h

  Exceptions:
  - drm_agpsupport.h - was in original drm; wrong spdx header auto-added

GPL exclusions in dist/include/uapi/drm:

- armada_drm.h
- etnaviv_drm.h
- exynos_drm.h
- lima_drm.h
- omap_drm.h

  Exceptions:
  - i810_drm.h - was in original drm; spdx header is wrong

Merge changes from current as of 20200406

Sync with head.

UVM locking changes, proposed on tech-kern:

- Change the lock on uvm_object, vm_amap and vm_anon to be a RW lock.
- Break v_interlock and vmobjlock apart.  v_interlock remains a mutex.
- Do partial PV list locking in the x86 pmap.  Others to follow later.

Reduce diffs by side-loading some header files like Linux.

From riastradh

Use a header file hack to cope with Linux/NetBSD namespace clashes.

Currently serves for:

ALIGN
mutex_init
mutex_destroy

Sync with head.

Apply patch from kamil@: vmobjlock needs to be held for uvm_pagemarkdirty().

Merge from yamt-pagecache (after much testing):

- Reduce unnecessary page scan in putpages esp. when an object has a ton of
  pages cached but only a few of them are dirty.

- Reduce the number of pmap operations by tracking page dirtiness more
  precisely in uvm layer.

Sync with HEAD

Sync with HEAD

Resolve a couple of conflicts (result of the uimin/uimax changes)

Draft support for drm prime.

Sprinkle idr_preload/idr_preload_end.

Try to do these outside all mutex locks.

Tricky case is i915_gem_context, where the struct mutex is held for a
long time.

Rename drm_gem_object::gemo_shm_uao -> drm_gem_object::filp.

The Linux member that is basically analogous to this is named so,
which means we can eliminate a few diffs this way.

merge linux-drm-v4-4-143

Import drm from Linux v4.4.143 (commit a8ea6276d00555387deaaa5eaeb380cd5c17bdc9).

   drivers/gpu/drm      -> sys/external/bsd/drm2/dist/drm
   include/drm          -> sys/external/bsd/drm2/dist/include/drm
   include/uapi/drm     -> sys/external/bsd/drm2/dist/uapi/drm

GPL sources excluded.

update from HEAD

Sync with netbsd-5

Sync with HEAD

Pull up following revision(s) (requested by maya in ticket #1272):
	sys/external/bsd/drm2/dist/drm/drm_gem.c: revision 1.6
Avoid zero-size uao.
Apparently some GEM/TTM objects can be zero-size, as discovered by
Stefan Hertenberger:
https://mail-index.netbsd.org/current-users/2016/08/02/msg029891.html

Pull up following revision(s) (requested by maya in ticket #1272):
	sys/external/bsd/drm2/dist/drm/drm_gem.c: revision 1.6
Avoid zero-size uao.
Apparently some GEM/TTM objects can be zero-size, as discovered by
Stefan Hertenberger:
https://mail-index.netbsd.org/current-users/2016/08/02/msg029891.html

Sync with HEAD

Avoid zero-size uao.

Apparently some GEM/TTM objects can be zero-size, as discovered by
Stefan Hertenberger:
https://mail-index.netbsd.org/current-users/2016/08/02/msg029891.html

Rebase to HEAD as of a few days ago.

Pull up following revision(s) (requested by riastradh in ticket #36):
	sys/external/bsd/drm2/dist/drm/drm_gem.c: revision 1.5
	sys/external/bsd/drm2/dist/drm/ttm/ttm_bo.c: revision 1.5
	sys/external/bsd/drm2/ttm/ttm_bo_vm.c: revision 1.3
	sys/external/bsd/drm2/dist/drm/ttm/ttm_bo.c: revision 1.6
bus_space_mmap cookies are not paddrs, so don't pmap_enter them!
For gem and ttm objects backed by uvm_aobjs, share the vmobjlock.
XXX pullup to 7
Simplify previous.

file drm_gem.c was added on branch tls-maxphys on 2014-08-20 00:04:08 +0000

For gem and ttm objects backed by uvm_aobjs, share the vmobjlock.

XXX pullup to 7

Rebase.

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.

fix merge conflicts

Import drm from Linux 3.15 (commitid 1860e379875dfe7271c649058aeddffe5afd9d0d).

   drivers/gpu/drm      -> sys/external/bsd/drm2/dist/drm
   include/drm          -> sys/external/bsd/drm2/dist/include/drm
   include/uapi/drm     -> sys/external/bsd/drm2/dist/uapi/drm

GPL sources excluded.

sync with head.

for a reference, the tree before this commit was tagged
as yamt-pagecache-tag8.

this commit was splitted into small chunks to avoid
a limitation of cvs.  ("Protocol error: too many arguments")

sync with head

file drm_gem.c was added on branch yamt-pagecache on 2014-05-22 11:40:52 +0000

Merge riastradh-drm2 to HEAD.

Remove some more needless #ifdef __NetBSD__.

sync with head

Ifdef out the Linux-style vm routines in drm_gem.c.

Manage the relevant uvm objects in gem object creation/destruction.

Destroy the idr and spin lock in drm_gem_destroy.

Remove drm prime stuff from drm_gem.c.

drm_gem.c needs <linux/err.h>, <linux/export.h>, and <asm/bug.h>.

sync with HEAD and actually get the drm2 import

file drm_gem.c was added on branch rmind-smpnet on 2013-08-28 23:59:32 +0000

file drm_gem.c was added on branch riastradh-drm2 on 2013-07-23 21:28:21 +0000

Import drm sources from Linux v3.8-rc6.
(commit id 88b62b915b0b7e25870eb0604ed9a92ba4bfc9f7)

Linux                   NetBSD
drivers/gpu/drm         sys/external/bsd/drm2/dist/drm
include/drm             sys/external/bsd/drm2/dist/include/drm
include/uapi/drm        sys/external/bsd/drm2/dist/uapi/drm

Files/subtrees excluded because of licence issues, to be either
revisited later (particularly nouveau and radeon, which are mostly
permissively licensed but a number of whose files have no licence
statements), rewritten/ignored, or imported later as kernel modules
under external/gpl2 instead:

   include/drm/drm_fb_cma_helper.h
   include/drm/drm_gem_cma_helper.h
   include/drm/drm_os_linux.h
   include/drm/drm_pciids.h
   include/drm/drm_sysfs.h
   include/drm/drm_usb.h
   include/drm/exynos_drm.h
   include/drm/gma_drm.h
   include/drm/intel-gtt.h
   drm/cirrus
   drm/drm_edid_load.c
   drm/drm_fb_cma_helper.c
   drm/drm_gem_cma_helper.c
   drm/drm_sysfs.c
   drm/drm_trace.h
   drm/drm_trace_points.c
   drm/drm_usb.c
   drm/exynos
   drm/gma500
   drm/i915/i915_trace.h
   drm/i915/i915_trace_points.c
   drm/i915/intel_acpi.c
   drm/mgag200
   drm/nouveau
   drm/radeon
   drm/shmobile
   drm/tegra
   drm/udl
   uapi/exynos_drm.h

Initial revision