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39844fb27c
Add an API to append data to a priv cmdbuf entry. Hold the write pointer offset internally in the entry instead of having the user keep track of where those words are written to. This helps in eventually hiding struct priv_cmd_entry from users and provides a more consistent interface in general. The wait and incr commands are now slightly easier to read as well when they're just arrays of data. A syncfd-backed prefence may be composed of several individual fences. Some of those (or even a fence backed by just one) may be already expired, and currently the syncfd export design releases and nulls semaphores when expired (see gk20a_sync_pt_has_signaled()) so for those the wait cmdbuf is appended with zeros; the specific function is for this purpose. Jira NVGPU-4548 Change-Id: I1057f98c1b5b407460aa6e1dcba917da9c9aa9c9 Signed-off-by: Konsta Hölttä <kholtta@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2325099 (cherry picked from commit 6a00a65a86d8249cfeb06a05682abb4771949f19) Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2331336 Reviewed-by: automaticguardword <automaticguardword@nvidia.com> Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com> Reviewed-by: Alex Waterman <alexw@nvidia.com> Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com> GVS: Gerrit_Virtual_Submit Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>