gpu: nvgpu: re-add API to disable all engine activity

Patch e1e059454a00ea28c5c9ab992eaf7f7c6780c3b8
removed the API gk20a_fifo_disable_all_engine_activity()
which disables activity on all engines

Re-add it since it is now needed in the shutdown path
to ensure engines are idle

Bug 200281010

Change-Id: Idf5860f7f5009f3fb875ce94b7d66007c866ac49
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: http://git-master/r/1457755
Reviewed-by: svccoveritychecker <svccoveritychecker@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>

1 files changed, 35 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/fifo_gk20a.c b/drivers/gpu/nvgpu/gk20a/fifo_gk20a.c
index 48253e59..c7db67fe 100644
--- a/drivers/gpu/nvgpu/gk20a/fifo_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/fifo_gk20a.c
@@ -2808,6 +2808,41 @@ clean_up:
         return err;
 }
 
+int gk20a_fifo_disable_all_engine_activity(struct gk20a *g,
+                                           bool wait_for_idle)
+{
+        unsigned int i;
+        int err = 0, ret = 0;
+        u32 active_engine_id;
+
+        for (i = 0; i < g->fifo.num_engines; i++) {
+                active_engine_id = g->fifo.active_engines_list[i];
+                err = gk20a_fifo_disable_engine_activity(g,
+                                &g->fifo.engine_info[active_engine_id],
+                                wait_for_idle);
+                if (err) {
+                        nvgpu_err(g, "failed to disable engine %d activity\n",
+                                active_engine_id);
+                        ret = err;
+                        break;
+                }
+        }
+
+        if (err) {
+                while (i-- != 0) {
+                        active_engine_id = g->fifo.active_engines_list[i];
+                        err = gk20a_fifo_enable_engine_activity(g,
+                                        &g->fifo.engine_info[active_engine_id]);
+                        if (err)
+                                nvgpu_err(g,
+                                        "failed to re-enable engine %d activity\n",
+                                        active_engine_id);
+                }
+        }
+
+        return ret;
+}
+
 static void gk20a_fifo_runlist_reset_engines(struct gk20a *g, u32 runlist_id)
 {
         struct fifo_gk20a *f = &g->fifo;