Move struct priv_cmd_queue to priv_cmdbuf.c so that its definition does
not need to be visible to all users of channel.h. This also forces it to
be separately allocated (during channel init time).
While at it, rename the functions to allocate and free priv cmdbuf
queues now that they're not in channel.c anymore. A private command
buffer queue is a piece of dma memory from which entries for incr and
wait command lists are suballocated. As the name implies, it's a queue;
allocations and frees of the bufs must happen in certain order.
Jira NVGPU-4548
Change-Id: I1b47029f3a478e1942f24292918b7b59a5d91528
Signed-off-by: Konsta Hölttä <kholtta@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2323147
(cherry picked from commit 1fcf9b04275f44638059c0147dc16c1dc6956510)
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2328407
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