gpu: nvgpu: APIs to disable/enable all engines' activity

Add below APIs to disable/re-enable activity on all
engines
gk20a_fifo_disable_all_engine_activity()
gk20a_fifo_enable_all_engine_activity()

Bug 200133289

Change-Id: Ie01a260d587807a3c1712ee32fe870fbcb08f9cd
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: http://git-master/r/798747
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Tested-by: Terje Bergstrom <tbergstrom@nvidia.com>

1 files changed, 49 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/fifo_gk20a.c b/drivers/gpu/nvgpu/gk20a/fifo_gk20a.c
index 0bd75026..069ea82a 100644
--- a/drivers/gpu/nvgpu/gk20a/fifo_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/fifo_gk20a.c
@@ -1870,6 +1870,24 @@ int gk20a_fifo_enable_engine_activity(struct gk20a *g,
         return 0;
 }
 
+int gk20a_fifo_enable_all_engine_activity(struct gk20a *g)
+{
+        int i;
+        int err = 0, ret = 0;
+
+        for (i = 0; i < g->fifo.max_engines; i++) {
+                err = gk20a_fifo_enable_engine_activity(g,
+                                &g->fifo.engine_info[i]);
+                if (err) {
+                        gk20a_err(dev_from_gk20a(g),
+                                "failed to enable engine %d activity\n", i);
+                        ret = err;
+                }
+        }
+
+        return ret;
+}
+
 int gk20a_fifo_disable_engine_activity(struct gk20a *g,
                                 struct fifo_engine_info_gk20a *eng_info,
                                 bool wait_for_idle)
@@ -1944,6 +1962,37 @@ clean_up:
         return err;
 }
 
+int gk20a_fifo_disable_all_engine_activity(struct gk20a *g,
+                                bool wait_for_idle)
+{
+        int i;
+        int err = 0, ret = 0;
+
+        for (i = 0; i < g->fifo.max_engines; i++) {
+                err = gk20a_fifo_disable_engine_activity(g,
+                                &g->fifo.engine_info[i],
+                                wait_for_idle);
+                if (err) {
+                        gk20a_err(dev_from_gk20a(g),
+                                "failed to disable engine %d activity\n", i);
+                        ret = err;
+                        break;
+                }
+        }
+
+        if (err) {
+                while (--i >= 0) {
+                        err = gk20a_fifo_enable_engine_activity(g,
+                                                &g->fifo.engine_info[i]);
+                        if (err)
+                                gk20a_err(dev_from_gk20a(g),
+                                 "failed to re-enable engine %d activity\n", i);
+                }
+        }
+
+        return ret;
+}
+
 static void gk20a_fifo_runlist_reset_engines(struct gk20a *g, u32 runlist_id)
 {
         struct fifo_gk20a *f = &g->fifo;