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authorSami Kiminki <skiminki@nvidia.com>2017-11-08 13:55:47 -0500
committermobile promotions <svcmobile_promotions@nvidia.com>2017-11-15 16:25:58 -0500
commit434385ca54053b13ac06a5f11cb7564d6740f02d (patch)
tree04cbfac9575af77c90e11da0fd8488fa221f2581 /drivers/gpu/nvgpu/gk20a/gk20a.h
parent3ff666c4b97c5ad869aefe0d9c335c187962c20e (diff)
gpu: nvgpu: Clean up comptag data structs and alloc
Clean up the comptag-related data structures and allocation logic. The most important change is that we only ever try comptag allocation once to prevent incorrect map aliasing. If we were to retry the allocation on further map calls, the following situation would become possible: (1) Request compressible kind mapping for a buffer. Comptag alloc failed and we proceed with incompressible kind fallback. (2) Request another compressible kind mapping for a buffer. Comptag alloc retry succeeded and now we use the compressible kind. (3) After writes through the compressible kind mapping, the buffer is no longer legible via the fallback incompressible kind mapping. The other changes are about removing the unused comptag-related fields in gk20a_comptags and nvgpu_mapped_buf, and retrieving comptags info only for compressible buffers. We also make nvgpu_ctag_buffer_info and nvgpu_vm_compute_compression as private mm/vm.c definitions, since they're not used elsewhere. Bug 1902982 Change-Id: I0c9fe48ccc585a80dd2c05ec606a079c1c1d41f1 Signed-off-by: Sami Kiminki <skiminki@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/1595153 GVS: Gerrit_Virtual_Submit Reviewed-by: Alex Waterman <alexw@nvidia.com> Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com> Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com> Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com> Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
Diffstat (limited to 'drivers/gpu/nvgpu/gk20a/gk20a.h')
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