gpu: nvgpu: don't mem_{begin,end}() for gr

Now that GR buffers always have a kernel mapping, remove the unnecessary
calls to nvgpu_mem_begin() and nvgpu_mem_end() on these buffers:

- global ctx buffer mem in gr
- gr ctx mem in a tsg
- patch ctx mem in a gr ctx
- pm ctx mem in a gr ctx
- ctx_header mem in a channel (subctx header)

Change-Id: Id2a8ad108aef8db8b16dce5bae8003bbcd3b23e4
Signed-off-by: Konsta Holtta <kholtta@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1760599
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Alex Waterman <alexw@nvidia.com>
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, 0 insertions, 5 deletions

diff --git a/drivers/gpu/nvgpu/gm20b/gr_gm20b.c b/drivers/gpu/nvgpu/gm20b/gr_gm20b.c
index 261c3054..f9eb97ce 100644
--- a/drivers/gpu/nvgpu/gm20b/gr_gm20b.c
+++ b/drivers/gpu/nvgpu/gm20b/gr_gm20b.c
@@ -1056,16 +1056,11 @@ int gr_gm20b_update_pc_sampling(struct channel_gk20a *c,
                 return -EINVAL;
 
 
-        if (nvgpu_mem_begin(c->g, mem))
-                return -ENOMEM;
-
         v = nvgpu_mem_rd(c->g, mem, ctxsw_prog_main_image_pm_o());
         v &= ~ctxsw_prog_main_image_pm_pc_sampling_m();
         v |= ctxsw_prog_main_image_pm_pc_sampling_f(enable);
         nvgpu_mem_wr(c->g, mem, ctxsw_prog_main_image_pm_o(), v);
 
-        nvgpu_mem_end(c->g, mem);
-
         nvgpu_log_fn(c->g, "done");
 
         return 0;