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gpu: nvgpu: gv11b: make subcontext mappings non-cacheable

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Without non-cacheable, gpu filled subcontext data not visible
to cpu without additional l2 flush. Similarly, there will be issues
where cpu updates to subcontext header will not visible to gpu without
additional l2 flush.

Making subcontext header mapping non-cacheable fixes this issue.

Bug 1937331

Change-Id: I8e25b7cac165e7481eec7c9f1f93bc7992183c46
Signed-off-by: seshendra Gadagottu <sgadagottu@nvidia.com>
Reviewed-on: http://git-master/r/1505283
Reviewed-by: Alex Waterman <alexw@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
This commit is contained in:
seshendra Gadagottu
2017-06-19 17:40:45 -07:00
committed by mobile promotions
parent 47eed28013
commit 492c7cc198
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/nvgpu/gv11b/subctx_gv11b.c
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@@ -66,7 +66,7 @@ int gv11b_alloc_subctx_header(struct channel_gk20a *c)
ctx->mem.gpu_va = nvgpu_gmmu_map(c->vm,
&ctx->mem,
ctx->mem.size,
NVGPU_MAP_BUFFER_FLAGS_CACHEABLE_TRUE,
NVGPU_MAP_BUFFER_FLAGS_CACHEABLE_FALSE,
gk20a_mem_flag_none, true,
ctx->mem.aperture);
if (!ctx->mem.gpu_va) {