kernel/drivers/gpu/drm/tegra/gem.c, branch linux-5.1.y

drm/tegra: gem: Fix CPU-cache maintenance for BO's allocated using get_pages()

2019-06-09T07:16:16Z

commit 61b51fb51c01a519a249d28ec55c6513a13be5a3 upstream. The allocated pages need to be invalidated in CPU caches. On ARM32 the DMA_BIDIRECTIONAL flag only ensures that data is written-back to DRAM and the data stays in CPU cache lines. While the DMA_FROM_DEVICE flag ensures that the corresponding CPU cache lines are getting invalidated and nothing more, that's exactly what is needed for a newly allocated pages. This fixes randomly failing rendercheck tests on Tegra30 using the Opentegra driver for tests that use small-sized pixmaps (10x10 and less, i.e. 1-2 memory pages) because apparently CPU reads out stale data from caches and/or that data is getting evicted to DRAM at the time of HW job execution. Fixes: bd43c9f0fa1f ("drm/tegra: gem: Map pages via the DMA API") Cc: stable Signed-off-by: Dmitry Osipenko Signed-off-by: Thierry Reding Signed-off-by: Greg Kroah-Hartman

Merge drm-upstream/drm-next into drm-misc-next

2018-06-20T16:22:22Z

We got a few conflicts in drm_atomic.c after merging the DRM writeback support, now we need a backmerge to unlock develop development on drm-misc-next. Signed-off-by: Gustavo Padovan

dma-buf: remove kmap_atomic interface

2018-06-20T13:59:34Z

Neither used nor correctly implemented anywhere. Just completely remove the interface. Signed-off-by: Christian König Reviewed-by: Daniel Vetter Acked-by: Sumit Semwal Link: https://patchwork.freedesktop.org/patch/226645/

drm/tegra: gem: Fill in missing export info

2018-05-18T19:52:19Z

Set the owner and name of the exported DMA-BUF in addition to the already filled-in fields. Reviewed-by: Dmitry Osipenko Tested-by: Dmitry Osipenko Signed-off-by: Thierry Reding

drm/tegra: Adding new typedef vm_fault_t

2018-05-17T15:44:48Z

Use new return type vm_fault_t for fault handler. For now, this is just documenting that the function returns a VM_FAULT value rather than an errno. Once all instances are converted, vm_fault_t will become a distinct type. Reference id -> 1c8f422059ae ("mm: change return type to vm_fault_t") Previously vm_insert_page() returns err which driver mapped into VM_FAULT_* type. The new function vmf_insert_page() will replace this inefficiency by returning VM_FAULT_* type. Signed-off-by: Souptick Joarder Signed-off-by: Thierry Reding

drm/tegra: prime: Implement ->{begin,end}_cpu_access()

2018-03-16T23:04:20Z

These callbacks allow the exporter to swap in and pin the backing storage for buffers as well as invalidate the cache in preparation for accessing the buffer from the CPU, and flush the cache and unpin the backing storage when the CPU is done modifying the buffer. Signed-off-by: Thierry Reding

drm/tegra: gem: Map pages via the DMA API

2018-03-16T23:03:54Z

When allocating pages, map them with the DMA API in order to invalidate caches. This is the correct usage of the API and works just as well as faking up the SG table and using the dma_sync_sg_for_device() function. Signed-off-by: Thierry Reding

drm/tegra: gem: Make __tegra_gem_mmap() available more widely

2018-03-08T13:38:30Z

This function allows mapping a GEM object into a virtual memory address space, which makes it useful outside of the GEM code. While at it, rename the function so it doesn't clash with the function that implements the DRM_TEGRA_GEM_MMAP IOCTL. Signed-off-by: Thierry Reding

drm/tegra: gem: Correct iommu_map_sg() error checking

2017-12-21T13:52:39Z

iommu_map_sg() doesn't return a error value, but a size of the requested IOMMU mapping or zero in case of error. Signed-off-by: Dmitry Osipenko Signed-off-by: Thierry Reding

Merge tag 'drm/tegra/for-4.14-rc1' of git://anongit.freedesktop.org/tegra/linux into drm-next

2017-08-21T07:37:33Z

drm/tegra: Changes for v4.14-rc1 This contains a couple of fixes and improvements for host1x, with some preparatory work for Tegra186 support. The remainder is cleanup and minor bugfixes for Tegra DRM along with enhancements to debuggability. There have also been some enhancements to the kernel interfaces for host1x job submissions and support for mmap'ing PRIME buffers directly, all of which get the interfaces very close to ready for serious work. * tag 'drm/tegra/for-4.14-rc1' of git://anongit.freedesktop.org/tegra/linux: (21 commits) drm/tegra: Prevent BOs from being freed during job submission drm/tegra: gem: Implement mmap() for PRIME buffers drm/tegra: Support render node drm/tegra: sor: Trace register accesses drm/tegra: dpaux: Trace register accesses drm/tegra: dsi: Trace register accesses drm/tegra: hdmi: Trace register accesses drm/tegra: dc: Trace register accesses drm/tegra: sor: Use unsigned int for register offsets drm/tegra: hdmi: Use unsigned int for register offsets drm/tegra: dsi: Use unsigned int for register offsets drm/tegra: dpaux: Use unsigned int for register offsets drm/tegra: dc: Use unsigned int for register offsets drm/tegra: Fix NULL deref in debugfs/iova drm/tegra: switch to drm_*_get(), drm_*_put() helpers drm/tegra: Set MODULE_FIRMWARE for the VIC drm/tegra: Add CONFIG_OF dependency gpu: host1x: Support sub-devices recursively gpu: host1x: fix error return code in host1x_probe() gpu: host1x: Fix bitshift/mask multipliers ...