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, 1 insertions, 7 deletions

diff --git a/drivers/gpu/nvgpu/gv11b/subctx_gv11b.c b/drivers/gpu/nvgpu/gv11b/subctx_gv11b.c
index 61fb8954..aad2b2fc 100644
--- a/drivers/gpu/nvgpu/gv11b/subctx_gv11b.c
+++ b/drivers/gpu/nvgpu/gv11b/subctx_gv11b.c
@@ -82,11 +82,7 @@ int gv11b_alloc_subctx_header(struct channel_gk20a *c)
                         return -ENOMEM;
                 }
                 /* Now clear the buffer */
-                if (nvgpu_mem_begin(g, &ctx->mem))
-                        return -ENOMEM;
-
                 nvgpu_memset(g, &ctx->mem, 0, 0, ctx->mem.size);
-                nvgpu_mem_end(g, &ctx->mem);
         }
         return ret;
 }
@@ -117,8 +113,6 @@ int gv11b_update_subctx_header(struct channel_gk20a *c, u64 gpu_va)
 
         gr_mem = &ctx->mem;
         g->ops.mm.l2_flush(g, true);
-        if (nvgpu_mem_begin(g, gr_mem))
-                return -ENOMEM;
 
         /* set priv access map */
         addr_lo = u64_lo32(gr_ctx->global_ctx_buffer_va[PRIV_ACCESS_MAP_VA]);
@@ -153,7 +147,7 @@ int gv11b_update_subctx_header(struct channel_gk20a *c, u64 gpu_va)
         nvgpu_mem_wr(g, gr_mem,
                 ctxsw_prog_main_image_ctl_o(),
                 ctxsw_prog_main_image_ctl_type_per_veid_header_v());
-        nvgpu_mem_end(g, gr_mem);
+
         return ret;
 }