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, 35 insertions, 21 deletions

diff --git a/drivers/gpu/nvgpu/vgpu/vgpu.c b/drivers/gpu/nvgpu/vgpu/vgpu.c
index 300ffc98..f5aef512 100644
--- a/drivers/gpu/nvgpu/vgpu/vgpu.c
+++ b/drivers/gpu/nvgpu/vgpu/vgpu.c
@@ -271,22 +271,11 @@ int vgpu_pm_prepare_poweroff(struct device *dev)
 static void vgpu_detect_chip(struct gk20a *g)
 {
         struct nvgpu_gpu_characteristics *gpu = &g->gpu_characteristics;
+        struct vgpu_priv_data *priv = vgpu_get_priv_data(g);
 
-        u32 mc_boot_0_value;
-
-        if (vgpu_get_attribute(vgpu_get_handle(g),
-                        TEGRA_VGPU_ATTRIB_PMC_BOOT_0,
-                        &mc_boot_0_value)) {
-                gk20a_err(dev_from_gk20a(g), "failed to detect chip");
-                return;
-        }
-
-        gpu->arch = mc_boot_0_architecture_v(mc_boot_0_value) <<
-                NVGPU_GPU_ARCHITECTURE_SHIFT;
-        gpu->impl = mc_boot_0_implementation_v(mc_boot_0_value);
-        gpu->rev =
-                (mc_boot_0_major_revision_v(mc_boot_0_value) << 4) |
-                mc_boot_0_minor_revision_v(mc_boot_0_value);
+        gpu->arch = priv->constants.arch;
+        gpu->impl = priv->constants.impl;
+        gpu->rev = priv->constants.rev;
 
         gk20a_dbg_info("arch: %x, impl: %x, rev: %x\n",
                         g->gpu_characteristics.arch,
@@ -296,7 +285,7 @@ static void vgpu_detect_chip(struct gk20a *g)
 
 static int vgpu_init_gpu_characteristics(struct gk20a *g)
 {
-        u32 max_freq;
+        struct vgpu_priv_data *priv = vgpu_get_priv_data(g);
         int err;
 
         gk20a_dbg_fn("");
@@ -305,11 +294,7 @@ static int vgpu_init_gpu_characteristics(struct gk20a *g)
         if (err)
                 return err;
 
-        if (vgpu_get_attribute(vgpu_get_handle(g),
-                        TEGRA_VGPU_ATTRIB_MAX_FREQ, &max_freq))
-                return -ENOMEM;
-
-        g->gpu_characteristics.max_freq = max_freq;
+        g->gpu_characteristics.max_freq = priv->constants.max_freq;
         g->gpu_characteristics.map_buffer_batch_limit = 0;
         return 0;
 }
@@ -500,6 +485,29 @@ static int vgpu_pm_init(struct device *dev)
         return err;
 }
 
+static int vgpu_get_constants(struct gk20a *g)
+{
+        struct tegra_vgpu_cmd_msg msg = {};
+        struct tegra_vgpu_constants_params *p = &msg.params.constants;
+        struct vgpu_priv_data *priv = vgpu_get_priv_data(g);
+        int err;
+
+        gk20a_dbg_fn("");
+
+        msg.cmd = TEGRA_VGPU_CMD_GET_CONSTANTS;
+        msg.handle = vgpu_get_handle(g);
+        err = vgpu_comm_sendrecv(&msg, sizeof(msg), sizeof(msg));
+        err = err ? err : msg.ret;
+
+        if (unlikely(err)) {
+                gk20a_err(g->dev, "%s failed, err=%d", __func__, err);
+                return err;
+        }
+
+        priv->constants = *p;
+        return 0;
+}
+
 int vgpu_probe(struct platform_device *pdev)
 {
         struct gk20a *gk20a;
@@ -573,6 +581,12 @@ int vgpu_probe(struct platform_device *pdev)
                 return -ENOSYS;
         }
 
+        err = vgpu_get_constants(gk20a);
+        if (err) {
+                vgpu_comm_deinit();
+                return err;
+        }
+
         priv->intr_handler = kthread_run(vgpu_intr_thread, gk20a, "gk20a");
         if (IS_ERR(priv->intr_handler))
                 return -ENOMEM;