gpu: nvgpu: delete semaphore release support

Semaphores don't need to be released from CPU anymore, so clarify the
code by deleting nvgpu_semaphore_release() and refactoring
__nvgpu_semaphore_release() to nvgpu_semaphore_reset() that only
"fast-forwards" the semaphore to a later value.

While doing this, the meaning of nvgpu_semaphore_incr() changes, so
rename it to nvgpu_semaphore_prepare(). Now it's only used to prepare an
nvgpu_semaphore for a value that the HW will increment the sema to.

Also change the BUG_ON that guards sema double-inits into just WARN_ON.

Change-Id: I6f6df368ec5436cc97a229697742b6a4115dca51
Signed-off-by: Konsta Holtta <kholtta@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1680361
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Automatic_Commit_Validation_User
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, 4 insertions, 4 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/channel_gk20a.c b/drivers/gpu/nvgpu/gk20a/channel_gk20a.c
index 65b17304..5befe086 100644
--- a/drivers/gpu/nvgpu/gk20a/channel_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/channel_gk20a.c
@@ -216,8 +216,8 @@ void gk20a_channel_abort_clean_up(struct channel_gk20a *ch)
                 while (tmp_get != put) {
                         job = &ch->joblist.pre_alloc.jobs[tmp_get];
                         if (job->post_fence->semaphore) {
-                                __nvgpu_semaphore_release(
-                                        job->post_fence->semaphore, true,
+                                nvgpu_semaphore_reset(
+                                        job->post_fence->semaphore,
                                         ch->hw_sema);
                                 released_job_semaphore = true;
                         }
@@ -228,8 +228,8 @@ void gk20a_channel_abort_clean_up(struct channel_gk20a *ch)
                                 &ch->joblist.dynamic.jobs,
                                 channel_gk20a_job, list) {
                         if (job->post_fence->semaphore) {
-                                __nvgpu_semaphore_release(
-                                        job->post_fence->semaphore, true,
+                                nvgpu_semaphore_reset(
+                                        job->post_fence->semaphore,
                                         ch->hw_sema);
                                 released_job_semaphore = true;
                         }