gpu: nvgpu: add sched control API

Added a dedicated device node to allow an
app manager to control TSG scheduling parameters:
- Get list of TSGs
- Get list of recent TSGs
- Get list of TSGs per pid
- Get TSG current scheduling parameters
- Set TSG timeslice
- Set TSG runlist interleave

Jira VFND-1586

Change-Id: I014c9d1534bce0eaea6c25ad114cf0cff317af79
Signed-off-by: Thomas Fleury <tfleury@nvidia.com>
Reviewed-on: http://git-master/r/1160384
(cherry picked from commit 75ca739517cc7f7f76714b5f6a1a57c39b8cb38e)
Reviewed-on: http://git-master/r/1167021
Reviewed-by: Richard Zhao <rizhao@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Alex Waterman <alexw@nvidia.com>
Reviewed-by: Vijayakumar Subbu <vsubbu@nvidia.com>

1 files changed, 1 insertions, 10 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/ctxsw_trace_gk20a.c b/drivers/gpu/nvgpu/gk20a/ctxsw_trace_gk20a.c
index d435bf79..d43c06be 100644
--- a/drivers/gpu/nvgpu/gk20a/ctxsw_trace_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/ctxsw_trace_gk20a.c
@@ -677,22 +677,13 @@ void gk20a_ctxsw_trace_tsg_reset(struct gk20a *g, struct tsg_gk20a *tsg)
                 .vmid = 0,
                 .tag = NVGPU_CTXSW_TAG_ENGINE_RESET,
                 .context_id = 0,
-                .pid = 0,
+                .pid = tsg->tgid,
         };
-        struct channel_gk20a *ch;
 
         if (!g->ctxsw_trace)
                 return;
 
         g->ops.read_ptimer(g, &entry.timestamp);
-        mutex_lock(&tsg->ch_list_lock);
-        if (!list_empty(&tsg->ch_list)) {
-                ch = list_entry(tsg->ch_list.next,
-                                struct channel_gk20a, ch_entry);
-                entry.pid = ch->pid;
-        }
-        mutex_unlock(&tsg->ch_list_lock);
-
         gk20a_ctxsw_trace_write(g, &entry);
         gk20a_ctxsw_trace_wake_up(g, 0);
 #endif