gpu: nvgpu: remove usage of nvgpu_gpfifo

Remove the usage of nvgpu_gpfifo splattered across nvgpu,
and replace with a struct defined in common code.
The usage is still inside Linux, but this helps the
subsequent unification efforts, e.g. to unify the submit
path.

VQRM-3465

Change-Id: I9e5ac697a0c7f85239ddba319085c09481d20d6b
Signed-off-by: Sourab Gupta <sourabg@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1691978
Reviewed-by: Konsta Holtta <kholtta@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 13 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/channel_gk20a.h b/drivers/gpu/nvgpu/gk20a/channel_gk20a.h
index ab1c4a6f..2008c471 100644
--- a/drivers/gpu/nvgpu/gk20a/channel_gk20a.h
+++ b/drivers/gpu/nvgpu/gk20a/channel_gk20a.h
@@ -59,6 +59,19 @@ struct nvgpu_channel_fence {
         u32 value;
 };
 
+/*
+ * The binary format of 'struct nvgpu_gpfifo_entry' introduced here
+ * should match that of 'struct nvgpu_gpfifo' defined in uapi header, since
+ * this struct is intended to be a mirror copy of the uapi struct. This is
+ * a rigid requirement because there's no conversion function and there are
+ * memcpy's present between the user gpfifo (of type nvgpu_gpfifo) and the
+ * kern gpfifo (of type nvgpu_gpfifo_entry).
+ */
+struct nvgpu_gpfifo_entry {
+        u32 entry0;
+        u32 entry1;
+};
+
 struct nvgpu_gpfifo_args {
         u32 num_entries;
         u32 num_inflight_jobs;