kernel.git/drivers/gpu/drm/i915/i915_gem_execbuffer.c, branch linux-4.2.y

drm/i915: Always mark the object as dirty when used by the GPU

2015-09-21T17:10:43Z

commit 51bc140431e233284660b1d22c47dec9ecdb521e upstream. There have been many hard to track down bugs whereby userspace forgot to flag a write buffer and then cause graphics corruption or a hung GPU when that buffer was later purged under memory pressure (as the buffer appeared clean, its pages would have been evicted rather than preserved and any changes more recent than in the backing storage would be lost). In retrospect this is a rare optimisation against memory pressure, already the slow path. If we always mark the buffer as dirty when accessed by the GPU, anything not used can still be evicted cheaply (ideal behaviour for mark-and-sweep eviction) but we do not run the risk of corruption. For correct read serialisation, userspace still has to notify when the GPU writes to an object. However, there are certain situations under which userspace may wish to tell white lies to the kernel... Signed-off-by: Chris Wilson Cc: Daniel Vetter Cc: Kristian Høgsberg Cc: Jesse Barnes Cc: "Goel, Akash" Cc: Michał Winiarski Reviewed-by: Daniel Vetter Signed-off-by: Jani Nikula Signed-off-by: Greg Kroah-Hartman

Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux

2015-06-26T20:18:51Z

Pull drm updates from Dave Airlie: "This is the main drm pull request for v4.2. I've one other new driver from freescale on my radar, it's been posted and reviewed, I'd just like to get someone to give it a last look, so maybe I'll send it or maybe I'll leave it. There is no major nouveau changes in here, Ben was working on something big, and we agreed it was a bit late, there wasn't anything else he considered urgent to merge. There might be another msm pull for some bits that are waiting on arm-soc, I'll see how we time it. This touches some "of" stuff, acks are in place except for the fixes to the build in various configs,t hat I just applied. Summary: New drivers: - virtio-gpu: KMS only pieces of driver for virtio-gpu in qemu. This is just the first part of this driver, enough to run unaccelerated userspace on. As qemu merges more we'll start adding the 3D features for the virgl 3d work. - amdgpu: a new driver from AMD to driver their newer GPUs. (VI+) It contains a new cleaner userspace API, and is a clean break from radeon moving forward, that AMD are going to concentrate on. It also contains a set of register headers auto generated from AMD internal database. core: - atomic modesetting API completed, enabled by default now. - Add support for mode_id blob to atomic ioctl to complete interface. - bunch of Displayport MST fixes - lots of misc fixes. panel: - new simple panels - fix some long-standing build issues with bridge drivers radeon: - VCE1 support - add a GPU reset counter for userspace - lots of fixes. amdkfd: - H/W debugger support module - static user-mode queues - support killing all the waves when a process terminates - use standard DECLARE_BITMAP i915: - Add Broxton support - S3, rotation support for Skylake - RPS booting tuning - CPT modeset sequence fixes - ns2501 dither support - enable cmd parser on haswell - cdclk handling fixes - gen8 dynamic pte allocation - lots of atomic conversion work exynos: - Add atomic modesetting support - Add iommu support - Consolidate drm driver initialization - and MIC, DECON and MIPI-DSI support for exynos5433 omapdrm: - atomic modesetting support (fixes lots of things in rewrite) tegra: - DP aux transaction fixes - iommu support fix msm: - adreno a306 support - various dsi bits - various 64-bit fixes - NV12MT support rcar-du: - atomic and misc fixes sti: - fix HDMI timing complaince tilcdc: - use drm component API to access tda998x driver - fix module unloading qxl: - stability fixes" * 'drm-next' of git://people.freedesktop.org/~airlied/linux: (872 commits) drm/nouveau: Pause between setting gpu to D3hot and cutting the power drm/dp/mst: close deadlock in connector destruction. drm: Always enable atomic API drm/vgem: Set unique to "vgem" of: fix a build error to of_graph_get_endpoint_by_regs function drm/dp/mst: take lock around looking up the branch device on hpd irq drm/dp/mst: make sure mst_primary mstb is valid in work function of: add EXPORT_SYMBOL for of_graph_get_endpoint_by_regs ARM: dts: rename the clock of MIPI DSI 'pll_clk' to 'sclk_mipi' drm/atomic: Don't set crtc_state->enable manually drm/exynos: dsi: do not set TE GPIO direction by input drm/exynos: dsi: add support for MIC driver as a bridge drm/exynos: dsi: add support for Exynos5433 drm/exynos: dsi: make use of array for clock access drm/exynos: dsi: make use of driver data for static values drm/exynos: dsi: add macros for register access drm/exynos: dsi: rename pll_clk to sclk_clk drm/exynos: mic: add MIC driver of: add helper for getting endpoint node of specific identifiers drm/exynos: add Exynos5433 decon driver ...

drm/i915: Inline check required for object syncing prior to execbuf

2015-05-21T13:11:43Z

This trims a little overhead from the common case of not needing to synchronize between rings. v2: execlists is special and likes to duplicate code. Signed-off-by: Chris Wilson Signed-off-by: Daniel Vetter

mm/fault, drm/i915: Use pagefault_disabled() to check for disabled pagefaults

2015-05-19T06:39:15Z

Now that the pagefault disabled counter is in place, we can replace the in_atomic() check by a pagefault_disabled() checks. Reviewed-and-tested-by: Thomas Gleixner Signed-off-by: David Hildenbrand Signed-off-by: Peter Zijlstra (Intel) Cc: David.Laight@ACULAB.COM Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: airlied@linux.ie Cc: akpm@linux-foundation.org Cc: benh@kernel.crashing.org Cc: bigeasy@linutronix.de Cc: borntraeger@de.ibm.com Cc: daniel.vetter@intel.com Cc: heiko.carstens@de.ibm.com Cc: herbert@gondor.apana.org.au Cc: hocko@suse.cz Cc: hughd@google.com Cc: mst@redhat.com Cc: paulus@samba.org Cc: ralf@linux-mips.org Cc: schwidefsky@de.ibm.com Cc: yang.shi@windriver.com Link: http://lkml.kernel.org/r/1431359540-32227-8-git-send-email-dahi@linux.vnet.ibm.com Signed-off-by: Ingo Molnar

drm/i915: Fix possible security hole in command parsing

2015-05-08T15:26:01Z

i915_parse_cmds returns -EACCES on chained batches, which "tells the caller to abort and dispatch the workload as a non-secure batch", but the mechanism implementing that was broken when flags |= I915_DISPATCH_SECURE was moved from i915_gem_execbuffer_parse to i915_gem_do_execbuffer (17cabf571e50677d980e9ab2a43c5f11213003ae): i915_gem_execbuffer_parse returns the original batch_obj in this case, and i915_gem_do_execbuffer doesn't check for that. Don't set the secure bit in this case to make sure such batches don't run with elevated priviledges. Signed-off-by: Rebecca Palmer Reviewed-by: Mika Kuoppala [danvet: Stitch together commit message. Also remove a comment as suggested by Mika. And style-align the comment while at it.] Signed-off-by: Daniel Vetter

drm/i915: Simplify cmd-parser DISPATCH_SECURE check

2015-05-08T11:03:09Z

i915_needs_cmd_parser already checks that for us. Suggested-by: Mika Kuoppala Cc: Mika Kuoppala Signed-off-by: Daniel Vetter

drm/i915: Enable cmd parser to do secure batch promotion for aliasing ppgtt

2015-04-30T10:29:56Z

With the binding regression from the original full ppgtt patches fixed we can throw the switch. Yay! Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=90190 Signed-off-by: Daniel Vetter Reviewed-by: Mika Kuoppala [Jani: tweaked commit title per Chris' suggestion] Signed-off-by: Jani Nikula

drm/i915: Fix up the vma aliasing ppgtt binding

2015-04-23T19:06:39Z

Currently we have the problem that the decision whether ptes need to be (re)written is splattered all over the codebase. Move all that into i915_vma_bind. This needs a few changes: - Just reuse the PIN_* flags for i915_vma_bind and do the conversion to vma->bound in there to avoid duplicating the conversion code all over. - We need to make binding for EXECBUF (i.e. pick aliasing ppgtt if around) explicit, add PIN_USER for that. - Two callers want to update ptes, give them a PIN_UPDATE for that. Of course we still want to avoid double-binding, but that should be taken care of: - A ppgtt vma will only ever see PIN_USER, so no issue with double-binding. - A ggtt vma with aliasing ppgtt needs both types of binding, and we track that properly now. - A ggtt vma without aliasing ppgtt could be bound twice. In the lower-level ->bind_vma functions hence unconditionally set GLOBAL_BIND when writing the ggtt ptes. There's still a bit room for cleanup, but that's for follow-up patches. v2: Fixup fumbles. v3: s/PIN_EXECBUF/PIN_USER/ for clearer meaning, suggested by Chris. Cc: Chris Wilson Reviewed-by: Mika Kuoppala Signed-off-by: Daniel Vetter

drm/i915: Don't use atomics for pg_dirty_rings

2015-04-23T19:06:02Z

It's already protected by the bkl^Wdev->struct_mutex. While at it realign some related code. Reviewed-by: Mika Kuoppala Signed-off-by: Daniel Vetter

drm/i915: Don't look at pg_dirty_rings for aliasing ppgtt

2015-04-23T19:06:02Z

We load the ppgtt ptes once per gpu reset/driver load/resume and that's all that's needed. Note that this only blows up when we're using the allocate_va_range funcs and not the special-purpose ones used. With this change we can get rid of that duplication. Reviewed-by: Mika Kuoppala Signed-off-by: Daniel Vetter