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The function ttm_bo_put releases a reference to a TTM buffer object. The
function's name is more aligned to the Linux kernel convention of naming
ref-counting function _get and _put.
A call to ttm_bo_unref takes the address of the TTM BO object's pointer and
clears the pointer's value to NULL. This is not necessary in most cases and
sometimes even worked around by the calling code. A call to ttm_bo_put only
releases the reference without clearing the pointer.
In places where is might be necessary, the current behaviour of cleaning the
pointer is kept.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Huang Rui <ray.huang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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Pull drm updates from Dave Airlie:
"Core:
- shared fencing staging removal
- drop transactional atomic helpers and move helpers to new location
- DP/MST atomic cleanup
- Leasing cleanups and drop EXPORT_SYMBOL
- Convert drivers to atomic helpers and generic fbdev.
- removed deprecated obj_ref/unref in favour of get/put
- Improve dumb callback documentation
- MODESET_LOCK_BEGIN/END helpers
panels:
- CDTech panels, Banana Pi Panel, DLC1010GIG,
- Olimex LCD-O-LinuXino, Samsung S6D16D0, Truly NT35597 WQXGA,
- Himax HX8357D, simulated RTSM AEMv8.
- GPD Win2 panel
- AUO G101EVN010
vgem:
- render node support
ttm:
- move global init out of drivers
- fix LRU handling for ghost objects
- Support for simultaneous submissions to multiple engines
scheduler:
- timeout/fault handling changes to help GPU recovery
- helpers for hw with preemption support
i915:
- Scaler/Watermark fixes
- DP MST + powerwell fixes
- PSR fixes
- Break long get/put shmemfs pages
- Icelake fixes
- Icelake DSI video mode enablement
- Engine workaround improvements
amdgpu:
- freesync support
- GPU reset enabled on CI, VI, SOC15 dGPUs
- ABM support in DC
- KFD support for vega12/polaris12
- SDMA paging queue on vega
- More amdkfd code sharing
- DCC scanout on GFX9
- DC kerneldoc
- Updated SMU firmware for GFX8 chips
- XGMI PSP + hive reset support
- GPU reset
- DC trace support
- Powerplay updates for newer Polaris
- Cursor plane update fast path
- kfd dma-buf support
virtio-gpu:
- add EDID support
vmwgfx:
- pageflip with damage support
nouveau:
- Initial Turing TU104/TU106 modesetting support
msm:
- a2xx gpu support for apq8060 and imx5
- a2xx gpummu support
- mdp4 display support for apq8060
- DPU fixes and cleanups
- enhanced profiling support
- debug object naming interface
- get_iova/page pinning decoupling
tegra:
- Tegra194 host1x, VIC and display support enabled
- Audio over HDMI for Tegra186 and Tegra194
exynos:
- DMA/IOMMU refactoring
- plane alpha + blend mode support
- Color format fixes for mixer driver
rcar-du:
- R8A7744 and R8A77470 support
- R8A77965 LVDS support
imx:
- fbdev emulation fix
- multi-tiled scalling fixes
- SPDX identifiers
rockchip
- dw_hdmi support
- dw-mipi-dsi + dual dsi support
- mailbox read size fix
qxl:
- fix cursor pinning
vc4:
- YUV support (scaling + cursor)
v3d:
- enable TFU (Texture Formatting Unit)
mali-dp:
- add support for linear tiled formats
sun4i:
- Display Engine 3 support
- H6 DE3 mixer 0 support
- H6 display engine support
- dw-hdmi support
- H6 HDMI phy support
- implicit fence waiting
- BGRX8888 support
meson:
- Overlay plane support
- implicit fence waiting
- HDMI 1.4 4k modes
bridge:
- i2c fixes for sii902x"
* tag 'drm-next-2018-12-14' of git://anongit.freedesktop.org/drm/drm: (1403 commits)
drm/amd/display: Add fast path for cursor plane updates
drm/amdgpu: Enable GPU recovery by default for CI
drm/amd/display: Fix duplicating scaling/underscan connector state
drm/amd/display: Fix unintialized max_bpc state values
Revert "drm/amd/display: Set RMX_ASPECT as default"
drm/amdgpu: Fix stub function name
drm/msm/dpu: Fix clock issue after bind failure
drm/msm/dpu: Clean up dpu_media_info.h static inline functions
drm/msm/dpu: Further cleanups for static inline functions
drm/msm/dpu: Cleanup the debugfs functions
drm/msm/dpu: Remove dpu_irq and unused functions
drm/msm: Make irq_postinstall optional
drm/msm/dpu: Cleanup callers of dpu_hw_blk_init
drm/msm/dpu: Remove unused functions
drm/msm/dpu: Remove dpu_crtc_is_enabled()
drm/msm/dpu: Remove dpu_crtc_get_mixer_height
drm/msm/dpu: Remove dpu_dbg
drm/msm: dpu: Remove crtc_lock
drm/msm: dpu: Remove vblank_requested flag from dpu_crtc
drm/msm: dpu: Separate crtc assignment from vblank enable
...
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With the new validation code, a malicious user-space app could
potentially submit command streams with enough buffer-object and resource
references in them to have the resulting allocated validion nodes and
relocations make the kernel run out of GFP_KERNEL memory.
Protect from this by having the validation code reserve TTM graphics
memory when allocating.
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Deepak Rawat <drawat@vmware.com>
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v2: Removed leftover debug printouts
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Let's support simultaneous submissions to multiple engines.
v2: rename the field to num_shared and fix up all users
v3: rebased
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
Reviewed-by: Junwei Zhang <Jerry.Zhang@amd.com>
Reviewed-by: Huang Rui <ray.huang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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Adapt the validation code so that vmw_validation_add[res|bo] can be called
under an rcu read lock (non-sleeping) and with rcu-only protected resource-
or buffer object pointers.
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Sinclair Yeh <syeh@vmware.com>
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A common trait of these objects are that they are allocated during the
command validation phase and freed after command submission. Furthermore
they are accessed by a single thread only. So provide a simple unprotected
stack-like allocator from which these objects can be allocated. Their
memory is freed with the validation context when the command submission
is done.
Note that the mm subsystem maintains a per-cpu cache of single pages to
make single page allocation and freeing efficient.
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Sinclair Yeh <syeh@vmware.com>
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Allow selecting interruptible or uninterruptible waits to match
expectations of callers.
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Deepak Rawat <drawat@vmware.com>
Reviewed-by: Sinclair Yeh <syeh@vmware.com>
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Isolate the functionality needed for reservation, validation and fencing
of vmwgfx buffer objects and resources and publish an API for this.
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Sinclair Yeh <syeh@vmware.com>
Reviewed-by: Deepak Rawat <drawat@vmware.com> #v1
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