mirror of
https://github.com/torvalds/linux
synced 2024-10-05 02:44:13 +00:00
b4b0193e83
Temporarily lock the fbdev buffer object during updates to prevent memory managers from evicting/moving the buffer. Moving a buffer object while update its content results in undefined behaviour. Fbdev-generic updates its buffer object from a shadow buffer. Gem-shmem and gem-dma helpers do not move buffer objects, so they are safe to be used with fbdev-generic. Gem-vram and qxl are based on TTM, but pin buffer objects are part of the vmap operation. So both are also safe to be used with fbdev-generic. Amdgpu and nouveau do not pin or lock the buffer object during an update. Their TTM-based memory management could move the buffer object while the update is ongoing. The new vmap_local and vunmap_local helpers hold the buffer object's reservation lock during the buffer update. This prevents moving the buffer object on all memory managers. Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Reviewed-by: Christian König <christian.koenig@amd.com> Reviewed-by: Dmitry Osipenko <dmitry.osipenko@collabora.com> Tested-by: Dmitry Osipenko <dmitry.osipenko@collabora.com> # virtio-gpu Acked-by: Zack Rusin <zack.rusin@broadcom.com> Link: https://patchwork.freedesktop.org/patch/msgid/20240227113853.8464-11-tzimmermann@suse.de |
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.. | ||
bridge | ||
display | ||
i2c | ||
ttm | ||
amd_asic_type.h | ||
drm_accel.h | ||
drm_aperture.h | ||
drm_atomic.h | ||
drm_atomic_helper.h | ||
drm_atomic_state_helper.h | ||
drm_atomic_uapi.h | ||
drm_audio_component.h | ||
drm_auth.h | ||
drm_blend.h | ||
drm_bridge.h | ||
drm_bridge_connector.h | ||
drm_buddy.h | ||
drm_cache.h | ||
drm_client.h | ||
drm_color_mgmt.h | ||
drm_connector.h | ||
drm_crtc.h | ||
drm_crtc_helper.h | ||
drm_damage_helper.h | ||
drm_debugfs.h | ||
drm_debugfs_crc.h | ||
drm_device.h | ||
drm_displayid.h | ||
drm_drv.h | ||
drm_edid.h | ||
drm_eld.h | ||
drm_encoder.h | ||
drm_encoder_slave.h | ||
drm_exec.h | ||
drm_fb_dma_helper.h | ||
drm_fb_helper.h | ||
drm_fbdev_dma.h | ||
drm_fbdev_generic.h | ||
drm_file.h | ||
drm_fixed.h | ||
drm_flip_work.h | ||
drm_format_helper.h | ||
drm_fourcc.h | ||
drm_framebuffer.h | ||
drm_gem.h | ||
drm_gem_atomic_helper.h | ||
drm_gem_dma_helper.h | ||
drm_gem_framebuffer_helper.h | ||
drm_gem_shmem_helper.h | ||
drm_gem_ttm_helper.h | ||
drm_gem_vram_helper.h | ||
drm_gpuvm.h | ||
drm_ioctl.h | ||
drm_kunit_helpers.h | ||
drm_lease.h | ||
drm_managed.h | ||
drm_mipi_dbi.h | ||
drm_mipi_dsi.h | ||
drm_mm.h | ||
drm_mode_config.h | ||
drm_mode_object.h | ||
drm_modes.h | ||
drm_modeset_helper.h | ||
drm_modeset_helper_vtables.h | ||
drm_modeset_lock.h | ||
drm_module.h | ||
drm_of.h | ||
drm_panel.h | ||
drm_pciids.h | ||
drm_plane.h | ||
drm_plane_helper.h | ||
drm_prime.h | ||
drm_print.h | ||
drm_privacy_screen_consumer.h | ||
drm_privacy_screen_driver.h | ||
drm_privacy_screen_machine.h | ||
drm_probe_helper.h | ||
drm_property.h | ||
drm_rect.h | ||
drm_self_refresh_helper.h | ||
drm_simple_kms_helper.h | ||
drm_suballoc.h | ||
drm_syncobj.h | ||
drm_sysfs.h | ||
drm_util.h | ||
drm_utils.h | ||
drm_vblank.h | ||
drm_vblank_work.h | ||
drm_vma_manager.h | ||
drm_writeback.h | ||
gma_drm.h | ||
gpu_scheduler.h | ||
gud.h | ||
i915_component.h | ||
i915_drm.h | ||
i915_gsc_proxy_mei_interface.h | ||
i915_hdcp_interface.h | ||
i915_pciids.h | ||
i915_pxp_tee_interface.h | ||
intel-gtt.h | ||
intel_lpe_audio.h | ||
spsc_queue.h | ||
task_barrier.h | ||
xe_pciids.h |