On Fri, Jan 24, 2020 at 12:53:54AM -0800, Niranjana Vishwanathapura wrote:
This patch series is WIP and not submission ready. It needs more clarity on locking strategy, synchronization between VM_BIND and execbuff paths, endless batch buffer support among other things. This patch series is in continuation of runtime allocator support in earlier posted series https://lists.freedesktop.org/archives/intel-gfx/2019-December/223480.html It is an initial dig to address (partially) some feedback received in patch [02/12] in above RFC series. Posting it for early feedback. Shared Virtual Memory (SVM) allows the programmer to use a single virtual address space which will be shared between threads executing on CPUs and GPUs. It abstracts away from the user the location of the backing memory, and hence simplifies the user programming model. This series supports SVM Runtime allocator that requires the driver to provide memory allocation and management interface through GEM buffer object (BO) interface. No change is done to execbuff command submission interface. The newly added ability to partial bind BOs is only supported via VM_BIND ioctl.
Forgot to add the point that any synchronization between objects involving bindings added via VM_BIND should be explicitly handled by the user.
The patch series includes - Support to partially bind gem buffer objects in ppgtt including aliasing - Support to mark VMs as active and wait for them to become idle - VM_BIND ioctl to bind an array of BO fragments to specified GPU VAs - Handle persistent vmas created through VM_BIND in the execbuff path - Support for user to enable/disable SVM support on a per VM basis - Initial dig at handling endless batch buffer Niranjana Vishwanathapura (8): drm/i915/svm: Support partial binding in ppgtt drm/i915/svm: Add support to mark VMs as active drm/i915/svm: Introduce VM_BIND ioctl drm/i915/svm: Manage SVM bindings added using VM_BIND drm/i915/svm: Handle persistent vmas drm/i915/svm: Skip vma_lookup for persistent vmas drm/i915/svm: Add support to en/disable SVM drm/i915/svm: VM_BIND for endless batch buffer drivers/gpu/drm/i915/Kconfig | 11 ++ drivers/gpu/drm/i915/Makefile | 3 + drivers/gpu/drm/i915/gem/i915_gem_context.c | 100 ++++++++++++++++++ drivers/gpu/drm/i915/gem/i915_gem_context.h | 4 + .../gpu/drm/i915/gem/i915_gem_execbuffer.c | 36 +++++++ drivers/gpu/drm/i915/gem/i915_gem_svm.c | 94 ++++++++++++++++ drivers/gpu/drm/i915/gem/i915_gem_svm.h | 22 ++++ drivers/gpu/drm/i915/gt/gen8_ppgtt.c | 37 ++++--- drivers/gpu/drm/i915/gt/intel_gtt.c | 43 ++++++++ drivers/gpu/drm/i915/gt/intel_gtt.h | 41 ++++++- drivers/gpu/drm/i915/i915_drv.c | 50 ++++++++- drivers/gpu/drm/i915/i915_drv.h | 32 ++++++ drivers/gpu/drm/i915/i915_gem_gtt.h | 14 +++ drivers/gpu/drm/i915/i915_getparam.c | 3 + drivers/gpu/drm/i915/i915_vma.c | 27 +++-- drivers/gpu/drm/i915/i915_vma.h | 17 ++- drivers/gpu/drm/i915/i915_vma_types.h | 7 ++ include/uapi/drm/i915_drm.h | 70 ++++++++++++ 18 files changed, 583 insertions(+), 28 deletions(-) create mode 100644 drivers/gpu/drm/i915/gem/i915_gem_svm.c create mode 100644 drivers/gpu/drm/i915/gem/i915_gem_svm.h -- 2.21.0.rc0.32.g243a4c7e27 _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
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