gpu: nvgpu: add syncpoint read map

For sync-point read map:
 1. Added nvgpu_mem memory allocator in gk20a struct and
    allocated memory for this in gk20a_finalize_poweron()
    and freed this memory in gk20a_remove().
 2. Added "u64 syncpt_ro_map_gpu_va" in vm_gk20a struct
    for read map in vm.

Added nvgpu_quiesce() in nvgpu_remove() before freeing
syncpoint read map to ensure that nvgpu is idle.

JIRA GPUT19X-2

Change-Id: I7cbfec57f0992682dd833a1b0d92d694bcaf1eb3
Signed-off-by: seshendra Gadagottu <sgadagottu@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1514338
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/common/mm/vm.c b/drivers/gpu/nvgpu/common/mm/vm.c
index 354d6ce4..f8d58349 100644
--- a/drivers/gpu/nvgpu/common/mm/vm.c
+++ b/drivers/gpu/nvgpu/common/mm/vm.c
@@ -527,6 +527,12 @@ static void __nvgpu_vm_remove(struct vm_gk20a *vm)
                 }
         }
 
+#if defined(CONFIG_TEGRA_GK20A_NVHOST) && defined(CONFIG_TEGRA_19x_GPU)
+        if (nvgpu_mem_is_valid(&g->syncpt_mem) && vm->syncpt_ro_map_gpu_va)
+                nvgpu_gmmu_unmap(vm, &g->syncpt_mem,
+                                vm->syncpt_ro_map_gpu_va);
+#endif
+
         nvgpu_mutex_acquire(&vm->update_gmmu_lock);
 
         nvgpu_rbtree_enum_start(0, &node, vm->mapped_buffers);