gpu: nvgpu: Get rid of legacy gpfifo type

Get rid of the duplicate gpfifo struct to emphasize the fact that
nvgpu_gpfifo is the only memory layout for gpfifo entries that works.
This is the same layout that HW uses.

Also, add a local pointer to the gpfifo memory in
gk20a_submit_channel_gpfifo to get rid of repeated typecasts.

Bug 1592391
Bug 1550886

Change-Id: I5432859ef8e7c1aab5907e44098994d7bb807f50
Signed-off-by: Janne Hellsten <jhellsten@nvidia.com>
Signed-off-by: Konsta Holtta <kholtta@nvidia.com>
Reviewed-on: http://git-master/r/677341
(cherry picked from commit 724c8c6228af81dd440e825bddf545dd6b2b8bd7)
Reviewed-on: http://git-master/r/822548
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Arto Merilainen <amerilainen@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/uapi/linux/nvgpu.h b/include/uapi/linux/nvgpu.h
index 138d7971..6fdf4025 100644
--- a/include/uapi/linux/nvgpu.h
+++ b/include/uapi/linux/nvgpu.h
@@ -563,6 +563,7 @@ struct nvgpu_dbg_gpu_pc_sampling_args {
 #define NVGPU_PRIORITY_HIGH 150
 #define NVGPU_TIMEOUT_FLAG_DISABLE_DUMP         0
 
+/* this is also the hardware memory format */
 struct nvgpu_gpfifo {
         __u32 entry0; /* first word of gpfifo entry */
         __u32 entry1; /* second word of gpfifo entry */