2013-10-09 15:18:51 +08:00
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config DRM_I915
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tristate "Intel 8xx/9xx/G3x/G4x/HD Graphics"
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depends on DRM
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2013-11-05 20:00:08 +08:00
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depends on X86 && PCI
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select INTEL_GTT
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drm/i915: Introduce mapping of user pages into video memory (userptr) ioctl
By exporting the ability to map user address and inserting PTEs
representing their backing pages into the GTT, we can exploit UMA in order
to utilize normal application data as a texture source or even as a
render target (depending upon the capabilities of the chipset). This has
a number of uses, with zero-copy downloads to the GPU and efficient
readback making the intermixed streaming of CPU and GPU operations
fairly efficient. This ability has many widespread implications from
faster rendering of client-side software rasterisers (chromium),
mitigation of stalls due to read back (firefox) and to faster pipelining
of texture data (such as pixel buffer objects in GL or data blobs in CL).
v2: Compile with CONFIG_MMU_NOTIFIER
v3: We can sleep while performing invalidate-range, which we can utilise
to drop our page references prior to the kernel manipulating the vma
(for either discard or cloning) and so protect normal users.
v4: Only run the invalidate notifier if the range intercepts the bo.
v5: Prevent userspace from attempting to GTT mmap non-page aligned buffers
v6: Recheck after reacquire mutex for lost mmu.
v7: Fix implicit padding of ioctl struct by rounding to next 64bit boundary.
v8: Fix rebasing error after forwarding porting the back port.
v9: Limit the userptr to page aligned entries. We now expect userspace
to handle all the offset-in-page adjustments itself.
v10: Prevent vma from being copied across fork to avoid issues with cow.
v11: Drop vma behaviour changes -- locking is nigh on impossible.
Use a worker to load user pages to avoid lock inversions.
v12: Use get_task_mm()/mmput() for correct refcounting of mm.
v13: Use a worker to release the mmu_notifier to avoid lock inversion
v14: Decouple mmu_notifier from struct_mutex using a custom mmu_notifer
with its own locking and tree of objects for each mm/mmu_notifier.
v15: Prevent overlapping userptr objects, and invalidate all objects
within the mmu_notifier range
v16: Fix a typo for iterating over multiple objects in the range and
rearrange error path to destroy the mmu_notifier locklessly.
Also close a race between invalidate_range and the get_pages_worker.
v17: Close a race between get_pages_worker/invalidate_range and fresh
allocations of the same userptr range - and notice that
struct_mutex was presumed to be held when during creation it wasn't.
v18: Sigh. Fix the refactor of st_set_pages() to allocate enough memory
for the struct sg_table and to clear it before reporting an error.
v19: Always error out on read-only userptr requests as we don't have the
hardware infrastructure to support them at the moment.
v20: Refuse to implement read-only support until we have the required
infrastructure - but reserve the bit in flags for future use.
v21: use_mm() is not required for get_user_pages(). It is only meant to
be used to fix up the kernel thread's current->mm for use with
copy_user().
v22: Use sg_alloc_table_from_pages for that chunky feeling
v23: Export a function for sanity checking dma-buf rather than encode
userptr details elsewhere, and clean up comments based on
suggestions by Bradley.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Cc: "Gong, Zhipeng" <zhipeng.gong@intel.com>
Cc: Akash Goel <akash.goel@intel.com>
Cc: "Volkin, Bradley D" <bradley.d.volkin@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Reviewed-by: Brad Volkin <bradley.d.volkin@intel.com>
[danvet: Frob ioctl allocation to pick the next one - will cause a bit
of fuss with create2 apparently, but such are the rules.]
[danvet2: oops, forgot to git add after manual patch application]
[danvet3: Appease sparse.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2014-05-16 21:22:37 +08:00
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select INTERVAL_TREE
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2013-10-09 15:18:51 +08:00
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# we need shmfs for the swappable backing store, and in particular
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# the shmem_readpage() which depends upon tmpfs
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select SHMEM
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select TMPFS
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select DRM_KMS_HELPER
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2015-01-23 21:30:56 +08:00
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select DRM_PANEL
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2015-01-16 20:27:23 +08:00
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select DRM_MIPI_DSI
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2013-10-09 15:18:51 +08:00
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# i915 depends on ACPI_VIDEO when ACPI is enabled
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# but for select to work, need to select ACPI_VIDEO's dependencies, ick
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select BACKLIGHT_LCD_SUPPORT if ACPI
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select BACKLIGHT_CLASS_DEVICE if ACPI
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select INPUT if ACPI
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select ACPI_VIDEO if ACPI
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select ACPI_BUTTON if ACPI
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help
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Choose this option if you have a system that has "Intel Graphics
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Media Accelerator" or "HD Graphics" integrated graphics,
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including 830M, 845G, 852GM, 855GM, 865G, 915G, 945G, 965G,
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G35, G41, G43, G45 chipsets and Celeron, Pentium, Core i3,
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Core i5, Core i7 as well as Atom CPUs with integrated graphics.
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If M is selected, the module will be called i915. AGP support
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is required for this driver to work. This driver is used by
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the Intel driver in X.org 6.8 and XFree86 4.4 and above. It
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replaces the older i830 module that supported a subset of the
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hardware in older X.org releases.
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Note that the older i810/i815 chipsets require the use of the
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i810 driver instead, and the Atom z5xx series has an entirely
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different implementation.
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config DRM_I915_PRELIMINARY_HW_SUPPORT
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bool "Enable preliminary support for prerelease Intel hardware by default"
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depends on DRM_I915
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2013-11-14 05:11:25 +08:00
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default n
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2013-10-09 15:18:51 +08:00
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help
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Choose this option if you have prerelease Intel hardware and want the
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i915 driver to support it by default. You can enable such support at
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runtime with the module option i915.preliminary_hw_support=1; this
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option changes the default for that module option.
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If in doubt, say "N".
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2016-01-11 17:16:14 +08:00
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config DRM_I915_USERPTR
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bool "Always enable userptr support"
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depends on DRM_I915
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select MMU_NOTIFIER
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default y
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help
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This option selects CONFIG_MMU_NOTIFIER if it isn't already
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selected to enabled full userptr support.
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If in doubt, say "Y".
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2016-03-03 22:36:43 +08:00
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drm/i915: gvt: Introduce the basic architecture of GVT-g
This patch introduces the very basic framework of GVT-g device model,
includes basic prototypes, definitions, initialization.
v12:
- Call intel_gvt_init() in driver early initialization stage. (Chris)
v8:
- Remove the GVT idr and mutex in intel_gvt_host. (Joonas)
v7:
- Refine the URL link in Kconfig. (Joonas)
- Refine the introduction of GVT-g host support in Kconfig. (Joonas)
- Remove the macro GVT_ALIGN(), use round_down() instead. (Joonas)
- Make "struct intel_gvt" a data member in struct drm_i915_private.(Joonas)
- Remove {alloc, free}_gvt_device()
- Rename intel_gvt_{create, destroy}_gvt_device()
- Expost intel_gvt_init_host()
- Remove the dummy "struct intel_gvt" declaration in intel_gvt.h (Joonas)
v6:
- Refine introduction in Kconfig. (Chris)
- The exposed API functions will take struct intel_gvt * instead of
void *. (Chris/Tvrtko)
- Remove most memebers of strct intel_gvt_device_info. Will add them
in the device model patches.(Chris)
- Remove gvt_info() and gvt_err() in debug.h. (Chris)
- Move GVT kernel parameter into i915_params. (Chris)
- Remove include/drm/i915_gvt.h, as GVT-g will be built within i915.
- Remove the redundant struct i915_gvt *, as the functions in i915
will directly take struct intel_gvt *.
- Add more comments for reviewer.
v5:
Take Tvrtko's comments:
- Fix the misspelled words in Kconfig
- Let functions take drm_i915_private * instead of struct drm_device *
- Remove redundant prints/local varible initialization
v3:
Take Joonas' comments:
- Change file name i915_gvt.* to intel_gvt.*
- Move GVT kernel parameter into intel_gvt.c
- Remove redundant debug macros
- Change error handling style
- Add introductions for some stub functions
- Introduce drm/i915_gvt.h.
Take Kevin's comments:
- Move GVT-g host/guest check into intel_vgt_balloon in i915_gem_gtt.c
v2:
- Introduce i915_gvt.c.
It's necessary to introduce the stubs between i915 driver and GVT-g host,
as GVT-g components is configurable in kernel config. When disabled, the
stubs here do nothing.
Take Joonas' comments:
- Replace boolean return value with int.
- Replace customized info/warn/debug macros with DRM macros.
- Document all non-static functions like i915.
- Remove empty and unused functions.
- Replace magic number with marcos.
- Set GVT-g in kernel config to "n" by default.
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Cc: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Zhi Wang <zhi.a.wang@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1466078825-6662-5-git-send-email-zhi.a.wang@intel.com
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
2016-06-16 20:07:00 +08:00
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config DRM_I915_GVT
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bool "Enable Intel GVT-g graphics virtualization host support"
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depends on DRM_I915
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default n
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help
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Choose this option if you want to enable Intel GVT-g graphics
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virtualization technology host support with integrated graphics.
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With GVT-g, it's possible to have one integrated graphics
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device shared by multiple VMs under different hypervisors.
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Note that at least one hypervisor like Xen or KVM is required for
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this driver to work, and it only supports newer device from
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Broadwell+. For further information and setup guide, you can
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visit: http://01.org/igvt-g.
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Now it's just a stub to support the modifications of i915 for
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GVT device model. It requires at least one MPT modules for Xen/KVM
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and other components of GVT device model to work. Use it under
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you own risk.
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If in doubt, say "N".
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2016-03-03 22:36:43 +08:00
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menu "drm/i915 Debugging"
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depends on DRM_I915
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depends on EXPERT
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source drivers/gpu/drm/i915/Kconfig.debug
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endmenu
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