gpu: nvgpu: gv100: enable syncpt shim for nvlink

Get host1x node reference from c1_rp device tree node, and
enable syncpoints shim in case of nvlink.

JIRA EVLR-2441
JIRA EVLR-2585

Change-Id: Idbf1edf656557f2ed2d3bd27393c2f4d5d1ad75a
Signed-off-by: Thomas Fleury <tfleury@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1663360
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 33 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/common/linux/nvhost.c b/drivers/gpu/nvgpu/common/linux/nvhost.c
index fa169cf0..6ab60248 100644
--- a/drivers/gpu/nvgpu/common/linux/nvhost.c
+++ b/drivers/gpu/nvgpu/common/linux/nvhost.c
@@ -258,4 +258,37 @@ u32 nvgpu_nvhost_syncpt_unit_interface_get_byte_offset(u32 syncpt_id)
 {
         return nvhost_syncpt_unit_interface_get_byte_offset(syncpt_id);
 }
+
+int nvgpu_nvhost_syncpt_init(struct gk20a *g)
+{
+        int err = 0;
+
+        if (!g->has_syncpoints)
+                return -ENOSYS;
+
+        err = nvgpu_get_nvhost_dev(g);
+        if (err) {
+                nvgpu_err(g, "host1x device not available");
+                g->has_syncpoints = false;
+                return -ENOSYS;
+        }
+
+        err = nvgpu_nvhost_syncpt_unit_interface_get_aperture(
+                        g->nvhost_dev,
+                        &g->syncpt_unit_base,
+                        &g->syncpt_unit_size);
+        if (err) {
+                nvgpu_err(g, "Failed to get syncpt interface");
+                g->has_syncpoints = false;
+                return -ENOSYS;
+        }
+
+        g->syncpt_size =
+                        nvgpu_nvhost_syncpt_unit_interface_get_byte_offset(1);
+        nvgpu_info(g, "syncpt_unit_base %llx syncpt_unit_size %zx size %x\n",
+                        g->syncpt_unit_base, g->syncpt_unit_size,
+                        g->syncpt_size);
+
+        return 0;
+}
 #endif