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

Pull drm updates from Dave Airlie:
 "Highlights:

   - AMD KFD driver merge

     This is the AMD HSA interface for exposing a lowlevel interface for
     GPGPU use.  They have an open source userspace built on top of this
     interface, and the code looks as good as it was going to get out of
     tree.

   - Initial atomic modesetting work

     The need for an atomic modesetting interface to allow userspace to
     try and send a complete set of modesetting state to the driver has
     arisen, and been suffering from neglect this past year.  No more,
     the start of the common code and changes for msm driver to use it
     are in this tree.  Ongoing work to get the userspace ioctl finished
     and the code clean will probably wait until next kernel.

   - DisplayID 1.3 and tiled monitor exposed to userspace.

     Tiled monitor property is now exposed for userspace to make use of.

   - Rockchip drm driver merged.

   - imx gpu driver moved out of staging

  Other stuff:

   - core:
        panel - MIPI DSI + new panels.
        expose suggested x/y properties for virtual GPUs

   - i915:
        Initial Skylake (SKL) support
        gen3/4 reset work
        start of dri1/ums removal
        infoframe tracking
        fixes for lots of things.

   - nouveau:
        tegra k1 voltage support
        GM204 modesetting support
        GT21x memory reclocking work

   - radeon:
        CI dpm fixes
        GPUVM improvements
        Initial DPM fan control

   - rcar-du:
        HDMI support added
        removed some support for old boards
        slave encoder driver for Analog Devices adv7511

   - exynos:
        Exynos4415 SoC support

   - msm:
        a4xx gpu support
        atomic helper conversion

   - tegra:
        iommu support
        universal plane support
        ganged-mode DSI support

   - sti:
        HDMI i2c improvements

   - vmwgfx:
        some late fixes.

   - qxl:
        use suggested x/y properties"

* 'drm-next' of git://people.freedesktop.org/~airlied/linux: (969 commits)
  drm: sti: fix module compilation issue
  drm/i915: save/restore GMBUS freq across suspend/resume on gen4
  drm: sti: correctly cleanup CRTC and planes
  drm: sti: add HQVDP plane
  drm: sti: add cursor plane
  drm: sti: enable auxiliary CRTC
  drm: sti: fix delay in VTG programming
  drm: sti: prepare sti_tvout to support auxiliary crtc
  drm: sti: use drm_crtc_vblank_{on/off} instead of drm_vblank_{on/off}
  drm: sti: fix hdmi avi infoframe
  drm: sti: remove event lock while disabling vblank
  drm: sti: simplify gdp code
  drm: sti: clear all mixer control
  drm: sti: remove gpio for HDMI hot plug detection
  drm: sti: allow to change hdmi ddc i2c adapter
  drm/doc: Document drm_add_modes_noedid() usage
  drm/i915: Remove '& 0xffff' from the mask given to WA_REG()
  drm/i915: Invert the mask and val arguments in wa_add() and WA_REG()
  drm: Zero out DRM object memory upon cleanup
  drm/i915/bdw: Fix the write setting up the WIZ hashing mode
  ...

1 files changed, 83 insertions, 5 deletions

diff --git a/include/linux/mmu_notifier.h b/include/linux/mmu_notifier.h
index ab8564b03468..95243d28a0ee 100644
--- a/include/linux/mmu_notifier.h
+++ b/include/linux/mmu_notifier.h
@@ -98,11 +98,11 @@ struct mmu_notifier_ops {
         /*
          * invalidate_range_start() and invalidate_range_end() must be
          * paired and are called only when the mmap_sem and/or the
-         * locks protecting the reverse maps are held. The subsystem
-         * must guarantee that no additional references are taken to
-         * the pages in the range established between the call to
-         * invalidate_range_start() and the matching call to
-         * invalidate_range_end().
+         * locks protecting the reverse maps are held. If the subsystem
+         * can't guarantee that no additional references are taken to
+         * the pages in the range, it has to implement the
+         * invalidate_range() notifier to remove any references taken
+         * after invalidate_range_start().
          *
          * Invalidation of multiple concurrent ranges may be
          * optionally permitted by the driver. Either way the
@@ -144,6 +144,29 @@ struct mmu_notifier_ops {
         void (*invalidate_range_end)(struct mmu_notifier *mn,
                                      struct mm_struct *mm,
                                      unsigned long start, unsigned long end);
+
+        /*
+         * invalidate_range() is either called between
+         * invalidate_range_start() and invalidate_range_end() when the
+         * VM has to free pages that where unmapped, but before the
+         * pages are actually freed, or outside of _start()/_end() when
+         * a (remote) TLB is necessary.
+         *
+         * If invalidate_range() is used to manage a non-CPU TLB with
+         * shared page-tables, it not necessary to implement the
+         * invalidate_range_start()/end() notifiers, as
+         * invalidate_range() alread catches the points in time when an
+         * external TLB range needs to be flushed.
+         *
+         * The invalidate_range() function is called under the ptl
+         * spin-lock and not allowed to sleep.
+         *
+         * Note that this function might be called with just a sub-range
+         * of what was passed to invalidate_range_start()/end(), if
+         * called between those functions.
+         */
+        void (*invalidate_range)(struct mmu_notifier *mn, struct mm_struct *mm,
+                                 unsigned long start, unsigned long end);
 };
 
 /*
@@ -190,6 +213,8 @@ extern void __mmu_notifier_invalidate_range_start(struct mm_struct *mm,
                                   unsigned long start, unsigned long end);
 extern void __mmu_notifier_invalidate_range_end(struct mm_struct *mm,
                                   unsigned long start, unsigned long end);
+extern void __mmu_notifier_invalidate_range(struct mm_struct *mm,
+                                  unsigned long start, unsigned long end);
 
 static inline void mmu_notifier_release(struct mm_struct *mm)
 {
@@ -242,6 +267,13 @@ static inline void mmu_notifier_invalidate_range_end(struct mm_struct *mm,
                 __mmu_notifier_invalidate_range_end(mm, start, end);
 }
 
+static inline void mmu_notifier_invalidate_range(struct mm_struct *mm,
+                                  unsigned long start, unsigned long end)
+{
+        if (mm_has_notifiers(mm))
+                __mmu_notifier_invalidate_range(mm, start, end);
+}
+
 static inline void mmu_notifier_mm_init(struct mm_struct *mm)
 {
         mm->mmu_notifier_mm = NULL;
@@ -279,6 +311,44 @@ static inline void mmu_notifier_mm_destroy(struct mm_struct *mm)
         __young;                                                        \
 })
 
+#define ptep_clear_flush_notify(__vma, __address, __ptep)               \
+({                                                                      \
+        unsigned long ___addr = __address & PAGE_MASK;                  \
+        struct mm_struct *___mm = (__vma)->vm_mm;                       \
+        pte_t ___pte;                                                   \
+                                                                        \
+        ___pte = ptep_clear_flush(__vma, __address, __ptep);            \
+        mmu_notifier_invalidate_range(___mm, ___addr,                   \
+                                        ___addr + PAGE_SIZE);           \
+                                                                        \
+        ___pte;                                                         \
+})
+
+#define pmdp_clear_flush_notify(__vma, __haddr, __pmd)                  \
+({                                                                      \
+        unsigned long ___haddr = __haddr & HPAGE_PMD_MASK;              \
+        struct mm_struct *___mm = (__vma)->vm_mm;                       \
+        pmd_t ___pmd;                                                   \
+                                                                        \
+        ___pmd = pmdp_clear_flush(__vma, __haddr, __pmd);               \
+        mmu_notifier_invalidate_range(___mm, ___haddr,                  \
+                                      ___haddr + HPAGE_PMD_SIZE);       \
+                                                                        \
+        ___pmd;                                                         \
+})
+
+#define pmdp_get_and_clear_notify(__mm, __haddr, __pmd)                 \
+({                                                                      \
+        unsigned long ___haddr = __haddr & HPAGE_PMD_MASK;              \
+        pmd_t ___pmd;                                                   \
+                                                                        \
+        ___pmd = pmdp_get_and_clear(__mm, __haddr, __pmd);              \
+        mmu_notifier_invalidate_range(__mm, ___haddr,                   \
+                                      ___haddr + HPAGE_PMD_SIZE);       \
+                                                                        \
+        ___pmd;                                                         \
+})
+
 /*
  * set_pte_at_notify() sets the pte _after_ running the notifier.
  * This is safe to start by updating the secondary MMUs, because the primary MMU
@@ -342,6 +412,11 @@ static inline void mmu_notifier_invalidate_range_end(struct mm_struct *mm,
 {
 }
 
+static inline void mmu_notifier_invalidate_range(struct mm_struct *mm,
+                                  unsigned long start, unsigned long end)
+{
+}
+
 static inline void mmu_notifier_mm_init(struct mm_struct *mm)
 {
 }
@@ -352,6 +427,9 @@ static inline void mmu_notifier_mm_destroy(struct mm_struct *mm)
 
 #define ptep_clear_flush_young_notify ptep_clear_flush_young
 #define pmdp_clear_flush_young_notify pmdp_clear_flush_young
+#define ptep_clear_flush_notify ptep_clear_flush
+#define pmdp_clear_flush_notify pmdp_clear_flush
+#define pmdp_get_and_clear_notify pmdp_get_and_clear
 #define set_pte_at_notify set_pte_at
 
 #endif /* CONFIG_MMU_NOTIFIER */