kernel/linux.git/drivers/gpu/drm/vgem, branch v5.16.1

drm/vgem: use shmem helpers

2021-08-12T19:41:10+00:00

Aside from deleting lots of code the real motivation here is to switch the mmap over to VM_PFNMAP, to be more consistent with what real gpu drivers do. They're all VM_PFNMAP, which means get_user_pages doesn't work, and even if you try and there's a struct page behind that, touching it and mucking around with its refcount can upset drivers real bad. v2: Review from Thomas: - sort #include - drop more dead code that I didn't spot somehow v3: select DRM_GEM_SHMEM_HELPER to make it build (intel-gfx-ci) v4: I got tricked by 0cf2ef46c6c0 ("drm/shmem-helper: Use cached mappings by default"), and we need WC in vgem because vgem doesn't have explicit begin/end cpu access ioctls. Also add a comment why exactly vgem has to use wc. v5: Don't set obj->base.funcs, it will default to drm_gem_shmem_funcs (Thomas) v6: vgem also needs an MMU for remapping v7: I absolutely butchered the rebases over the vgem mmap change and revert and broke the patch. Actually go back to v6 from before the vgem mmap changes. Cc: Thomas Zimmermann Acked-by: Thomas Zimmermann Cc: John Stultz Cc: Sumit Semwal Cc: "Christian König" Signed-off-by: Daniel Vetter Cc: Melissa Wen Cc: Chris Wilson Link: https://patchwork.freedesktop.org/patch/msgid/20210812131412.2487363-4-daniel.vetter@ffwll.ch

dma-buf: drop the _rcu postfix on function names v3

2021-06-06T09:19:51+00:00

The functions can be called both in _rcu context as well as while holding the lock. v2: add some kerneldoc as suggested by Daniel v3: fix indentation Signed-off-by: Christian König Reviewed-by: Jason Ekstrand Acked-by: Daniel Vetter Link: https://patchwork.freedesktop.org/patch/msgid/20210602111714.212426-7-christian.koenig@amd.com

drm/vgem/vgem_drv: Standard comment blocks should not use kernel-doc format

2021-06-03T08:32:49+00:00

Fixes the following W=1 kernel build warning(s): drivers/gpu/drm/vgem/vgem_drv.c:47: warning: expecting prototype for This is vgem, a (non-hardware(). Prototype was for DRIVER_NAME() instead Cc: David Airlie Cc: Daniel Vetter Cc: Sumit Semwal Cc: "Christian König" Cc: Adam Jackson Cc: Ben Widawsky Cc: dri-devel@lists.freedesktop.org Cc: linux-media@vger.kernel.org Cc: linaro-mm-sig@lists.linaro.org Signed-off-by: Lee Jones Signed-off-by: Daniel Vetter Link: https://patchwork.freedesktop.org/patch/msgid/20210526084726.552052-31-lee.jones@linaro.org

drm/prime: split array import functions v4

2020-11-30T14:00:45+00:00

Mapping the imported pages of a DMA-buf into an userspace process doesn't work as expected. But we have reoccurring requests on this approach, so split the functions for this and document that dma_buf_mmap() needs to be used instead. v2: split it into two functions v3: rebased on latest changes v4: update commit message a bit Signed-off-by: Christian König Acked-by: Daniel Vetter Link: https://patchwork.freedesktop.org/patch/403838/

mm: introduce vma_set_file function v5

2020-11-19T09:36:36+00:00

Add the new vma_set_file() function to allow changing vma->vm_file with the necessary refcount dance. v2: add more users of this. v3: add missing EXPORT_SYMBOL, rebase on mmap cleanup, add comments why we drop the reference on two occasions. v4: make it clear that changing an anonymous vma is illegal. v5: move vma_set_file to mm/util.c Signed-off-by: Christian König Reviewed-by: Daniel Vetter (v2) Reviewed-by: Jason Gunthorpe Acked-by: Andrew Morton Link: https://patchwork.freedesktop.org/patch/399360/

drm/vgem: replace idr_init() by idr_init_base()

2020-11-10T14:22:28+00:00

idr_init() uses base 0 which is an invalid identifier. The new function idr_init_base allows IDR to set the ID lookup from base 1. This avoids all lookups that otherwise starts from 0 since 0 is always unused. References: commit 6ce711f27500 ("idr: Make 1-based IDRs more efficient") Signed-off-by: Deepak R Varma Signed-off-by: Daniel Vetter Link: https://patchwork.freedesktop.org/patch/msgid/20201105173646.GA41732@localhost

drm/gem: Use struct dma_buf_map in GEM vmap ops and convert GEM backends

2020-11-09T08:19:24+00:00

This patch replaces the vmap/vunmap's use of raw pointers in GEM object functions with instances of struct dma_buf_map. GEM backends are converted as well. For most of them, this simply changes the returned type. TTM-based drivers now return information about the location of the memory, either system or I/O memory. GEM VRAM helpers and qxl now use ttm_bo_vmap() et al. Amdgpu, nouveau and radeon use drm_gem_ttm_vmap() et al instead of implementing their own vmap callbacks. v7: * init QXL cursor to mapped BO buffer (kernel test robot) v5: * update vkms after switch to shmem v4: * use ttm_bo_vmap(), drm_gem_ttm_vmap(), et al. (Daniel, Christian) * fix a trailing { in drm_gem_vmap() * remove several empty functions instead of converting them (Daniel) * comment uses of raw pointers with a TODO (Daniel) * TODO list: convert more helpers to use struct dma_buf_map Signed-off-by: Thomas Zimmermann Acked-by: Christian König Tested-by: Sam Ravnborg Link: https://patchwork.freedesktop.org/patch/msgid/20201103093015.1063-7-tzimmermann@suse.de

drm/: Constify struct drm_driver

2020-11-06T09:31:26+00:00

Only the following drivers aren't converted: - amdgpu, because of the driver_feature mangling due to virt support. Subsequent patch will address this. - nouveau, because DRIVER_ATOMIC uapi is still not the default on the platforms where it's supported (i.e. again driver_feature mangling) - vc4, again because of driver_feature mangling - qxl, because the ioctl table is somewhere else and moving that is maybe a bit too much, hence the num_ioctls assignment prevents a const driver structure. - arcpgu, because that is stuck behind a pending tiny-fication series from me. - legacy drivers, because legacy requires non-const drm_driver. Note that for armada I also went ahead and made the ioctl array const. Only cc'ing the driver people who've not been converted (everyone else is way too much). v2: Fix one misplaced const static, should be static const (0day) v3: - Improve commit message (Sam) Acked-by: Sam Ravnborg Cc: kernel test robot Acked-by: Maxime Ripard Reviewed-by: Alex Deucher Signed-off-by: Daniel Vetter Cc: Sam Ravnborg Cc: Dave Airlie Cc: Gerd Hoffmann Cc: virtualization@lists.linux-foundation.org Cc: Harry Wentland Cc: Leo Li Cc: Alex Deucher Cc: Christian König Cc: Eric Anholt Cc: Maxime Ripard Cc: Ben Skeggs Cc: nouveau@lists.freedesktop.org Signed-off-by: Daniel Vetter Link: https://patchwork.freedesktop.org/patch/msgid/20201104100425.1922351-5-daniel.vetter@ffwll.ch

Revert "mm: introduce vma_set_file function v4"

2020-11-05T16:08:43+00:00

The kernel test robot is not happy with that. This reverts commit 2b5b95b1ff3d70a95013a45e3b5b90f1daf42348. Signed-off-by: Christian König Acked-by: Daniel Vetter Link: https://patchwork.freedesktop.org/patch/394773/

mm: introduce vma_set_file function v4

2020-11-05T12:03:52+00:00

Add the new vma_set_file() function to allow changing vma->vm_file with the necessary refcount dance. v2: add more users of this. v3: add missing EXPORT_SYMBOL, rebase on mmap cleanup, add comments why we drop the reference on two occasions. v4: make it clear that changing an anonymous vma is illegal. Signed-off-by: Christian König Reviewed-by: Daniel Vetter (v2) Reviewed-by: Jason Gunthorpe Link: https://patchwork.freedesktop.org/patch/394773/