gpu: nvgpu: don't nvgpu_mem_{begin,end}() sim bufs

nvgpu_dma_alloc_sys() gives cpu-mapped memory by default. Remove the
explicit calls to map and unmap the sim buffers.

Change-Id: Icf71961c16a8b2f5dae24382cc927c7a802a769a
Signed-off-by: Konsta Holtta <kholtta@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1761580
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, 2 insertions, 17 deletions

diff --git a/drivers/gpu/nvgpu/common/sim.c b/drivers/gpu/nvgpu/common/sim.c
index 81146cd9..c46f0959 100644
--- a/drivers/gpu/nvgpu/common/sim.c
+++ b/drivers/gpu/nvgpu/common/sim.c
@@ -31,28 +31,13 @@
 
 int nvgpu_alloc_sim_buffer(struct gk20a *g, struct nvgpu_mem *mem)
 {
-        int err;
-
-        err = nvgpu_dma_alloc_sys(g, PAGE_SIZE, mem);
-        if (err)
-                return err;
-        /*
-         * create a valid cpu_va mapping
-         */
-        nvgpu_mem_begin(g, mem);
-
-        return 0;
+        return nvgpu_dma_alloc_sys(g, PAGE_SIZE, mem);
 }
 
 void nvgpu_free_sim_buffer(struct gk20a *g, struct nvgpu_mem *mem)
 {
-        if (nvgpu_mem_is_valid(mem)) {
-                /*
-                 * invalidate the cpu_va mapping
-                 */
-                nvgpu_mem_end(g, mem);
+        if (nvgpu_mem_is_valid(mem))
                 nvgpu_dma_free(g, mem);
-        }
 
         memset(mem, 0, sizeof(*mem));
 }