gpu: nvgpu: Implement abstraction for finding TID

Implement abstraction for finding the thread ID of thread currently
being run. This is tracked for context switch tracing.

In Linux kernel this is implemented by returning PID.

Change-Id: Id46a318894f9a2ff3c85d2c8ef0b02c52783f122
Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1627239
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 3 insertions, 2 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/channel_gk20a.c b/drivers/gpu/nvgpu/gk20a/channel_gk20a.c
index 07ae5a16..f4a49a4b 100644
--- a/drivers/gpu/nvgpu/gk20a/channel_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/channel_gk20a.c
@@ -44,6 +44,7 @@
 #include <nvgpu/barrier.h>
 #include <nvgpu/ctxsw_trace.h>
 #include <nvgpu/error_notifier.h>
+#include <nvgpu/os_sched.h>
 
 #include "gk20a.h"
 #include "dbg_gpu_gk20a.h"
@@ -726,8 +727,8 @@ struct channel_gk20a *gk20a_open_new_channel(struct gk20a *g,
         /* now the channel is in a limbo out of the free list but not marked as
          * alive and used (i.e. get-able) yet */
 
-        ch->pid = current->pid;
-        ch->tgid = current->tgid;  /* process granularity for FECS traces */
+        ch->pid = nvgpu_current_tid(g);
+        ch->tgid = nvgpu_current_pid(g);  /* process granularity for FECS traces */
 
         /* By default, channel is regular (non-TSG) channel */
         ch->tsgid = NVGPU_INVALID_TSG_ID;