gpu: nvgpu: add syncpoint read map

For sync-point read map:
 1. Added nvgpu_mem memory allocator in gk20a struct and
    allocated memory for this in gk20a_finalize_poweron()
    and freed this memory in gk20a_remove().
 2. Added "u64 syncpt_ro_map_gpu_va" in vm_gk20a struct
    for read map in vm.

Added nvgpu_quiesce() in nvgpu_remove() before freeing
syncpoint read map to ensure that nvgpu is idle.

JIRA GPUT19X-2

Change-Id: I7cbfec57f0992682dd833a1b0d92d694bcaf1eb3
Signed-off-by: seshendra Gadagottu <sgadagottu@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1514338
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 9 insertions, 1 deletions

diff --git a/drivers/gpu/nvgpu/common/linux/module.c b/drivers/gpu/nvgpu/common/linux/module.c
index ac64041e..52f987b2 100644
--- a/drivers/gpu/nvgpu/common/linux/module.c
+++ b/drivers/gpu/nvgpu/common/linux/module.c
@@ -25,6 +25,7 @@
 #include <linux/reset.h>
 #include <linux/platform/tegra/common.h>
 
+#include <nvgpu/dma.h>
 #include <nvgpu/kmem.h>
 #include <nvgpu/nvgpu_common.h>
 #include <nvgpu/soc.h>
@@ -1026,9 +1027,16 @@ int nvgpu_remove(struct device *dev, struct class *class)
         struct gk20a *g = get_gk20a(dev);
         struct nvgpu_os_linux *l = nvgpu_os_linux_from_gk20a(g);
         struct gk20a_platform *platform = gk20a_get_platform(dev);
+        int err;
 
         gk20a_dbg_fn("");
 
+        err = nvgpu_quiesce(g);
+        WARN(err, "gpu failed to idle during driver removal");
+
+        if (nvgpu_mem_is_valid(&g->syncpt_mem))
+                nvgpu_dma_free(g, &g->syncpt_mem);
+
         if (platform->has_cde)
                 gk20a_cde_destroy(l);
 
@@ -1061,7 +1069,7 @@ int nvgpu_remove(struct device *dev, struct class *class)
 
         gk20a_dbg_fn("removed");
 
-        return 0;
+        return err;
 }
 
 static int __exit gk20a_remove(struct platform_device *pdev)