gpu: nvgpu: Remove extraneous VM init/deinit APIs

Support only VM pointers and ref-counting for maintaining VMs. This
dramatically reduces the complexity of the APIs, avoids the API
abuse that has existed, and ensures that future VM usage is
consistent with current usage.

Also remove the combined VM free/instance block deletion. Any place
where this was done is now replaced with an explict free of the
instance block and a nvgpu_vm_put().

JIRA NVGPU-12
JIRA NVGPU-30

Change-Id: Ib73e8d574ecc9abf6dad0b40a2c5795d6396cc8c
Signed-off-by: Alex Waterman <alexw@nvidia.com>
Reviewed-on: http://git-master/r/1480227
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/gk20a.c b/drivers/gpu/nvgpu/gk20a/gk20a.c
index 31b0a771..e4d454fe 100644
--- a/drivers/gpu/nvgpu/gk20a/gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/gk20a.c
@@ -436,10 +436,10 @@ int gk20a_init_gpu_characteristics(struct gk20a *g)
 
         gpu->bus_type = NVGPU_GPU_BUS_TYPE_AXI; /* always AXI for now */
 
-        gpu->big_page_size = g->mm.pmu.vm.big_page_size;
         gpu->compression_page_size = g->ops.fb.compression_page_size(g);
+        gpu->big_page_size = platform->default_big_page_size;
         gpu->pde_coverage_bit_count =
-                gk20a_mm_pde_coverage_bit_count(&g->mm.pmu.vm);
+                g->ops.mm.get_mmu_levels(g, gpu->big_page_size)[0].lo_bit[0];
 
         if (g->mm.disable_bigpage) {
                 gpu->big_page_size = 0;