gpu: nvgpu: gv11b: fb_flush before/after l2_flush

After enabling l2 write back in gv11b, for committing all
dirty data to sysmem correctly:
Added one fb_flush before l2_flush to commit dirty hshub data to l2/sysmem.
Added one more fb_flush after l2_flush, to commit any new dirty data on
hshub to sysmem.

This done by implementing gv11b specific l2_flush function.

Bug 1937331

Change-Id: Ie30edb12c98c4021783c88750bb4c4ca62e4a7ca
Signed-off-by: seshendra Gadagottu <sgadagottu@nvidia.com>
Reviewed-on: http://git-master/r/1503385
Reviewed-by: Alex Waterman <alexw@nvidia.com>
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gv11b/mm_gv11b.c b/drivers/gpu/nvgpu/gv11b/mm_gv11b.c
index 269108ff..9d1e0f25 100644
--- a/drivers/gpu/nvgpu/gv11b/mm_gv11b.c
+++ b/drivers/gpu/nvgpu/gv11b/mm_gv11b.c
@@ -52,6 +52,15 @@ static bool gv11b_mm_mmu_fault_pending(struct gk20a *g)
         return false;
 }
 
+void gv11b_mm_l2_flush(struct gk20a *g, bool invalidate)
+{
+        nvgpu_log(g, gpu_dbg_fn, "gv11b_mm_l2_flush");
+
+        g->ops.mm.fb_flush(g);
+        gk20a_mm_l2_flush(g, invalidate);
+        g->ops.mm.fb_flush(g);
+}
+
 void gv11b_init_mm(struct gpu_ops *gops)
 {
         gp10b_init_mm(gops);
@@ -59,4 +68,5 @@ void gv11b_init_mm(struct gpu_ops *gops)
         gops->mm.init_inst_block = gv11b_init_inst_block;
         gops->mm.init_mm_setup_hw = gk20a_init_mm_setup_hw;
         gops->mm.mmu_fault_pending = gv11b_mm_mmu_fault_pending;
+        gops->mm.l2_flush = gv11b_mm_l2_flush;
 }