The max values that the Linux nvhost driver tracks are adding some
complexity to our wrapper APIs. Max values are used only for internal
submit syncpoint tracking, so implement that tracking in the sync code
by just storing the last value that the syncpoing will reach after all
jobs are complete.
The value is a simple u32. It's accessed from functions in the submit
path that already is serialized, so there's no worrying about atomic
modifications.
Previously nvhost_syncpt_set_min_eq_max_ext() was used to reset the
syncpoint when necessary. Now with the internal max value we'll use
nvhost_syncpt_set_minval(), so add a wrapper for it.
The maxval reported with the user syncpoint allocation is just the
current value at allocation time since no jobs have affected it yet;
there is no means for the kernel to track the max value of user
syncpoints.
Jira NVGPU-5506
Change-Id: I34672eaa7fe3af36b2fbac92d11babe2bc6a2d2b
Signed-off-by: Konsta Hölttä <kholtta@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2400635
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Refactor user managed syncpoints out of the channel sync infrastructure
that deals with jobs submitted via the kernel api. The user syncpt only
needs to expose the id and gpu address of the reserved syncpoint. None
of the rest (fences, priv cmdbufs) is needed for that, so it hasn't been
ideal to couple with the user-allocated syncpts.
With user syncpts now provided by channel_user_syncpt, remove the
user_managed flag from the kernel sync api.
This allows moving all the kernel submit sync code to be conditionally
compiled in only when needed, and separates the user sync functionality
in a more clear way from the rest with a minimal API.
[this is squashed with commit 5111caea601a (gpu: nvgpu: guard user
syncpt with nvhost config) from
https://git-master.nvidia.com/r/c/linux-nvgpu/+/2325009]
Jira NVGPU-4548
Change-Id: I99259fc9cbd30bbd478ed86acffcce12768502d3
Signed-off-by: Konsta Hölttä <kholtta@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2321768
(cherry picked from commit 1095ad353f5f1cf7ca180d0701bc02a607404f5e)
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2319629
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
