gpu: nvgpu: gv100: fb hal to init and enable nvlink

Add the following hals:
(1) init_nvlink to configure nvlink(s) for sysmem in HSHUB
(2) enable_nvlink to switch from PCIe sysmem to nvlink sysmem,
    and setup atomics.

Change-Id: I73d2370aaf8e0530158a1091d9efef4a8cf2aac5
Signed-off-by: Thomas Fleury <tfleury@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1648044
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Vijayakumar Subbu <vsubbu@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 14 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gv100/nvlink_gv100.c b/drivers/gpu/nvgpu/gv100/nvlink_gv100.c
index e5e65c51..ba649382 100644
--- a/drivers/gpu/nvgpu/gv100/nvlink_gv100.c
+++ b/drivers/gpu/nvgpu/gv100/nvlink_gv100.c
@@ -1638,6 +1638,13 @@ int gv100_nvlink_init(struct gk20a *g)
 
         /* Set HSHUB and SG_PHY */
         __nvgpu_set_enabled(g, NVGPU_MM_USE_PHYSICAL_SG, true);
+
+        err = g->ops.fb.enable_nvlink(g);
+        if (err) {
+                nvgpu_err(g, "failed switch to nvlink sysmem");
+                return err;
+        }
+
         return err;
 }
 
@@ -2142,12 +2149,19 @@ int gv100_nvlink_interface_init(struct gk20a *g)
 {
         unsigned long mask = g->nvlink.enabled_links;
         u32 link_id;
+        int err;
 
         for_each_set_bit(link_id, &mask, 32) {
                 gv100_nvlink_initialize_mif(g, link_id);
                 gv100_nvlink_mif_intr_enable(g, link_id, true);
         }
 
+        err = g->ops.fb.init_nvlink(g);
+        if (err) {
+                nvgpu_err(g, "failed to setup nvlinks for sysmem");
+                return err;
+        }
+
         return 0;
 }