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/gp10b/rpfb_gp10b.c b/drivers/gpu/nvgpu/gp10b/rpfb_gp10b.c
index 0fb4248c..56786929 100644
--- a/drivers/gpu/nvgpu/gp10b/rpfb_gp10b.c
+++ b/drivers/gpu/nvgpu/gp10b/rpfb_gp10b.c
@@ -28,7 +28,7 @@ int gp10b_replayable_pagefault_buffer_init(struct gk20a *g)
 {
         u32 addr_lo;
         u32 addr_hi;
-        struct vm_gk20a *vm = &g->mm.bar2.vm;
+        struct vm_gk20a *vm = g->mm.bar2.vm;
         int err;
         size_t rbfb_size = NV_UVM_FAULT_BUF_SIZE *
                 fifo_replay_fault_buffer_size_hw_entries_v();
@@ -57,7 +57,7 @@ int gp10b_replayable_pagefault_buffer_init(struct gk20a *g)
 
 void gp10b_replayable_pagefault_buffer_deinit(struct gk20a *g)
 {
-        struct vm_gk20a *vm = &g->mm.bar2.vm;
+        struct vm_gk20a *vm = g->mm.bar2.vm;
 
         nvgpu_dma_unmap_free(vm, &g->mm.bar2_desc);
 }