gpu: nvgpu: vgpu: add cmd to get RM server constants

Moving getting constant attributes into one cmd which will be
called only once.

This patch adds basic infrastructure and gpu arch info, max_freq
and num_channels support.

JIRA VFND-2103

Change-Id: I100599b49f29c99966f9e90ea381b1f3c09177a3
Signed-off-by: Richard Zhao <rizhao@nvidia.com>
Reviewed-on: http://git-master/r/1189832
GVS: Gerrit_Virtual_Submit
Reviewed-by: Vladislav Buzov <vbuzov@nvidia.com>

1 files changed, 2 insertions, 7 deletions

diff --git a/drivers/gpu/nvgpu/vgpu/fifo_vgpu.c b/drivers/gpu/nvgpu/vgpu/fifo_vgpu.c
index baab42c8..9a8c319b 100644
--- a/drivers/gpu/nvgpu/vgpu/fifo_vgpu.c
+++ b/drivers/gpu/nvgpu/vgpu/fifo_vgpu.c
@@ -237,6 +237,7 @@ static int vgpu_init_fifo_setup_sw(struct gk20a *g)
 {
         struct fifo_gk20a *f = &g->fifo;
         struct device *d = dev_from_gk20a(g);
+        struct vgpu_priv_data *priv = vgpu_get_priv_data(g);
         int chid, err = 0;
 
         gk20a_dbg_fn("");
@@ -247,13 +248,7 @@ static int vgpu_init_fifo_setup_sw(struct gk20a *g)
         }
 
         f->g = g;
-
-        err = vgpu_get_attribute(vgpu_get_handle(g),
-                                TEGRA_VGPU_ATTRIB_NUM_CHANNELS,
-                                &f->num_channels);
-        if (err)
-                return -ENXIO;
-
+        f->num_channels = priv->constants.num_channels;
         f->max_engines = nvgpu_get_litter_value(g, GPU_LIT_HOST_NUM_ENGINES);
 
         f->userd_entry_size = 1 << ram_userd_base_shift_v();