drm/nouveau/svm: initial support for shared virtual memory

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This uses HMM to mirror a process' CPU page tables into a channel's page
tables, and keep them synchronised so that both the CPU and GPU are able
to access the same memory at the same virtual address.

While this code also supports Volta/Turing, it's only enabled for Pascal
GPUs currently due to channel recovery being unreliable right now on the
later GPUs.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

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This commit is contained in:

Ben Skeggs 2018-07-05 12:57:12 +10:00

parent bfe91afaca

commit eeaf06ac1a

10 changed files with 818 additions and 1 deletions

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1

drivers/gpu/drm/nouveau/Kbuild

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11

drivers/gpu/drm/nouveau/Kconfig

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drivers/gpu/drm/nouveau/nouveau_chan.c

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drivers/gpu/drm/nouveau/nouveau_drm.c

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drivers/gpu/drm/nouveau/nouveau_drv.h

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drivers/gpu/drm/nouveau/nouveau_svm.c

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drivers/gpu/drm/nouveau/nouveau_svm.h

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drivers/gpu/drm/nouveau/nouveau_vmm.c

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drivers/gpu/drm/nouveau/nouveau_vmm.h

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include/uapi/drm/nouveau_drm.h

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