gpu: nvgpu: Add VIDMEM debugging

Add some VIDMEM debugging to help track the background free
thread and allocs/frees.

JIRA NVGPU-30
JIRA NVGPU-138

Change-Id: I88471b29d2a42c104666b111d0d3014110c9d56c
Signed-off-by: Alex Waterman <alexw@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1576330
GVS: Gerrit_Virtual_Submit
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>

1 files changed, 6 insertions, 1 deletions

diff --git a/drivers/gpu/nvgpu/common/linux/vidmem.c b/drivers/gpu/nvgpu/common/linux/vidmem.c
index 92e7e504..03976da3 100644
--- a/drivers/gpu/nvgpu/common/linux/vidmem.c
+++ b/drivers/gpu/nvgpu/common/linux/vidmem.c
@@ -77,7 +77,8 @@ static void gk20a_vidbuf_release(struct dma_buf *dmabuf)
         struct nvgpu_vidmem_linux *linux_buf = buf->priv;
         struct gk20a *g = buf->g;
 
-        gk20a_dbg_fn("");
+        vidmem_dbg(g, "Releasing Linux VIDMEM buf: dmabuf=0x%p size=%zuKB",
+                   dmabuf, buf->mem->size >> 10);
 
         if (linux_buf && linux_buf->dmabuf_priv_delete)
                 linux_buf->dmabuf_priv_delete(linux_buf->dmabuf_priv);
@@ -202,6 +203,9 @@ int nvgpu_vidmem_export_linux(struct gk20a *g, size_t bytes)
         /* fclose() on this drops one ref, freeing the dma buf */
         fd_install(fd, priv->dmabuf->file);
 
+        vidmem_dbg(g, "Alloced Linux VIDMEM buf: dmabuf=0x%p size=%zuKB",
+                   priv->dmabuf, buf->mem->size >> 10);
+
         return fd;
 
 fail:
@@ -209,6 +213,7 @@ fail:
         nvgpu_kfree(g, priv);
         gk20a_put(g);
 
+        vidmem_dbg(g, "Failed to alloc Linux VIDMEM buf: %d", err);
         return err;
 }