gpu: nvgpu: Standardize HAS_SYNCPOINTs check

Nvgpu uses many ways to check if sync points are enabled. The four
ways used to be:

  platform->has_syncpoints
  g->has_syncpoints
  nvgpu_is_enabled(g, NVPGU_HAS_SYNCPOINTS)
  gk20a_platform_has_syncpoints()

This patch standardizes all usage to now be nvgpu_has_syncpoints()
which is based on gk20a_platform_has_syncpoints() - just renamed to
be general to nvgpu.

All usage of the other forms have now been consolidated. However,
under the hood nvgpu_has_syncpoints() does check the is_enabled
flag. This flag is now set where g->has_syncpoints used to be set
based on the platform data.

The basic dependency chain is this:

  nvgpu_has_syncpoints -> NVGPU_HAS_SYNCPOINTS ->
    platform->has_syncpoints

However, note: there are several places where syncpoints can be
disabled if some other driver initialization fails (for ex. host1x).
Also note that nvgpu_has_syncpoints() also considers a disable
variable set by debugfs.

Bug 2327574

Change-Id: Ia2375a80f5f2e27285e6175568dd13e6bb25fd33
Signed-off-by: Alex Waterman <alexw@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1803975
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/common/mm/vm.c b/drivers/gpu/nvgpu/common/mm/vm.c
index 1e6c4601..7f0b3d10 100644
--- a/drivers/gpu/nvgpu/common/mm/vm.c
+++ b/drivers/gpu/nvgpu/common/mm/vm.c
@@ -225,7 +225,7 @@ static int nvgpu_init_sema_pool(struct vm_gk20a *vm)
         /*
          * Don't waste the memory on semaphores if we don't need them.
          */
-        if (nvgpu_is_enabled(g, NVGPU_HAS_SYNCPOINTS)) {
+        if (nvgpu_has_syncpoints(g)) {
                 return 0;
         }
 
@@ -609,7 +609,7 @@ static void __nvgpu_vm_remove(struct vm_gk20a *vm)
          * pool involves unmapping a GMMU mapping which means aquiring the
          * update_gmmu_lock.
          */
-        if (!nvgpu_is_enabled(g, NVGPU_HAS_SYNCPOINTS)) {
+        if (!nvgpu_has_syncpoints(g)) {
                 if (vm->sema_pool) {
                         nvgpu_semaphore_pool_unmap(vm->sema_pool, vm);
                         nvgpu_semaphore_pool_put(vm->sema_pool);