kernel/include/uapi/drm/nouveau_drm.h, branch linux-5.2.y

drm/nouveau/svm: new ioctl to migrate process memory to GPU memory

2019-02-19T23:00:03Z

This add an ioctl to migrate a range of process address space to the device memory. On platform without cache coherent bus (x86, ARM, ...) this means that CPU can not access that range directly, instead CPU will fault which will migrate the memory back to system memory. This is behind a staging flag so that we can evolve the API. Signed-off-by: Jérôme Glisse

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

2019-02-19T23:00:02Z

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

drm/nouveau: drop drm/ prefix from include

2016-05-13T13:06:10Z

Similar to the rest of the DRM UAPI - these are to be imported unmodified into libdrm. In current form that's impossible. Signed-off-by: Emil Velikov Acked-by: Ben Skeggs

drm/nouveau: add extern C guard for the UAPI header

2016-05-13T13:06:09Z

Signed-off-by: Emil Velikov Acked-by: Ben Skeggs

nouveau_drm.h: use u32 and u64 from linux/types.h

2015-12-10T11:33:23Z

Fixes userspace compilation errors like: drm/nouveau_drm.h:41:2: error: unknown type name ‘uint32_t’ Signed-off-by: Mikko Rapeli

drm/nouveau: remove unnecessary usage of object handles

2015-11-03T05:02:18Z

No longer required in a lot of cases, as objects are identified over NVIF via an alternate mechanism since the rework. Signed-off-by: Ben Skeggs

drm/nouveau/gem: allow user-space to specify an object should be coherent

2015-04-14T07:00:46Z

User-space use mappable BOs notably for fences, and expects that a value update by the GPU will be immediatly visible through the user-space mapping. ARM has a property that may prevent this from happening though: memory can be mapped multiple times only if the different mappings share the same caching properties. However all the lowmem memory is already identity-mapped into the kernel with cache enabled, so when user-space requests an uncached mapping, we actually get an "undefined caching policy" one and this has strange side-effects described on Freedesktop bug 86690. To prevent this from happening, allow user-space to explicitly specify which objects should be coherent, and create such objects with the TTM_PL_FLAG_UNCACHED flag. This will make TTM allocate memory using the DMA API, which will fix the identify mapping and allow us to safely map the objects to user-space uncached. Signed-off-by: Alexandre Courbot Reviewed-by: Lucas Stach Signed-off-by: Ben Skeggs

drm/nouveau: expose the full object/event interfaces to userspace

2014-08-09T19:28:18Z

Signed-off-by: Ben Skeggs

drm/nouveau: use ioctl interface for abi16 grobj alloc

2014-08-09T19:13:17Z