kernel/drivers/gpu/drm/msm/msm_gem_submit.c, branch linux-5.1.y

Remove 'type' argument from access_ok() function

2019-01-04T02:57:57Z

Nobody has actually used the type (VERIFY_READ vs VERIFY_WRITE) argument of the user address range verification function since we got rid of the old racy i386-only code to walk page tables by hand. It existed because the original 80386 would not honor the write protect bit when in kernel mode, so you had to do COW by hand before doing any user access. But we haven't supported that in a long time, and these days the 'type' argument is a purely historical artifact. A discussion about extending 'user_access_begin()' to do the range checking resulted this patch, because there is no way we're going to move the old VERIFY_xyz interface to that model. And it's best done at the end of the merge window when I've done most of my merges, so let's just get this done once and for all. This patch was mostly done with a sed-script, with manual fix-ups for the cases that weren't of the trivial 'access_ok(VERIFY_xyz' form. There were a couple of notable cases: - csky still had the old "verify_area()" name as an alias. - the iter_iov code had magical hardcoded knowledge of the actual values of VERIFY_{READ,WRITE} (not that they mattered, since nothing really used it) - microblaze used the type argument for a debug printout but other than those oddities this should be a total no-op patch. I tried to fix up all architectures, did fairly extensive grepping for access_ok() uses, and the changes are trivial, but I may have missed something. Any missed conversion should be trivially fixable, though. Signed-off-by: Linus Torvalds

Merge tag 'drm-next-2018-12-14' of git://anongit.freedesktop.org/drm/drm

2018-12-25T19:48:26Z

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 ...

drm/msm/gpu: add submit flag to hint which buffers should be dumped

2018-12-11T18:07:04Z

To lower CPU overhead, future userspace will be switching to pinning iova and avoiding the use of relocs, and only include cmds table entries for IB1 level cmdstream (but not IB2 or state-groups). This leaves the kernel unsure what to dump for rd/hangrd cmdstream dumping. So add a MSM_SUBMIT_BO_DUMP flag so userspace can indicate buffers that contain cmdstream (or are otherwise important to dump). Signed-off-by: Rob Clark

drm/msm: Count how many times iova memory is pinned

2018-12-11T18:05:32Z

Add a reference count to track how many times a particular chunk of iova memory is pinned (mapped) in the iomu and add msm_gem_unpin_iova to give up references. It is important to note that msm_gem_unpin_iova replaces msm_gem_put_iova because the new implicit behavior that an assigned iova in a given vma is now valid for the life of the buffer and what we are really focusing on is the use of that iova. For now the unmappings are lazy; once the reference counts go to zero they *COULD* be unmapped dynamically but that will require an outside force such as a shrinker or mm_notifiers. For now, we're just focusing on getting the counting right and setting ourselves up to be ready for the future. Signed-off-by: Jordan Crouse Signed-off-by: Rob Clark

drm/msm: Add msm_gem_get_and_pin_iova()

2018-12-11T18:05:32Z

Add a new function to get and pin the iova memory in one step (basically renaming the old msm_gem_get_iova function) and switch msm_gem_get_iova() to only allocate an iova but not map it in the IOMMU. This is only currently used by msm_ioctl_gem_info() since all other users of of the iova expect that the memory be immediately available. Signed-off-by: Jordan Crouse Signed-off-by: Rob Clark

drm/msm/gpu: Add trace events for tracking GPU submissions

2018-12-11T18:05:28Z

Add trace events to track the progress of a GPU submission msm_gpu_submit occurs at the beginning of the submissions, msm_gpu_submit_flush happens when the submission is put on the ringbuffer and msm_submit_flush_retired is sent when the operation is retired. To make it easier to track the operations a unique sequence number is assigned to each submission and displayed in each event output so a human or a script can easily associate the events related to a specific submission. Signed-off-by: Jordan Crouse Signed-off-by: Rob Clark

drm/msm: Move fence put to where failure occurs

2018-12-03T13:46:13Z

If dma_fence_wait fails to wait for a supplied in-fence in msm_ioctl_gem_submit, make sure we release that in-fence. Also remove this dma_fence_put() from the 'out' label. Signed-off-by: Robert Foss Reviewed-by: Chris Wilson Cc: stable@vger.kernel.org Signed-off-by: Rob Clark Signed-off-by: Sean Paul

drm/msm/gpu: Don't map command buffers with nr_relocs equal to 0

2018-12-03T13:46:13Z

If a command buffer doesn't have any relocs assigned to it there then is no need to map it in the kernel address space. Signed-off-by: Jordan Crouse Signed-off-by: Rob Clark Signed-off-by: Sean Paul

dma-buf: allow reserving more than one shared fence slot

2018-10-25T11:45:07Z

Let's support simultaneous submissions to multiple engines. Signed-off-by: Christian König Reviewed-by: Michel Dänzer Reviewed-by: Junwei Zhang Reviewed-by: Huang Rui Link: https://patchwork.kernel.org/patch/10626149/

drm/msm: Replace drm_gem_object_{un/reference} with put, get functions

2018-10-04T00:24:55Z

This patch unifies the naming of DRM functions for reference counting of struct drm_gem_object. The resulting code is more aligned with the rest of the Linux kernel interfaces. Signed-off-by: Thomas Zimmermann Reviewed-by: Jordan Crouse Signed-off-by: Rob Clark