gpu: nvgpu: suspend/resume support for vGPU

- Added suspend/resume power management callbacks for vGPU
- Added suspend/resume commands for communication between vGPU and
  RM server
- Added suspend/resume message parameters for IVC messages between
  vGPU and RM server

JIRA EVLR-2305
JIRA EVLR-2306

Change-Id: I83a314b4e125a53117d16c5ea72dbc5d8ef96ef7
Signed-off-by: Deepak Bhosale <dbhosale@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1735153
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Richard Zhao <rizhao@nvidia.com>
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Nirav Patel <nipatel@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 35 insertions, 1 deletions

diff --git a/drivers/gpu/nvgpu/os/linux/vgpu/vgpu_linux.c b/drivers/gpu/nvgpu/os/linux/vgpu/vgpu_linux.c
index a7612e54..25024e7d 100644
--- a/drivers/gpu/nvgpu/os/linux/vgpu/vgpu_linux.c
+++ b/drivers/gpu/nvgpu/os/linux/vgpu/vgpu_linux.c
@@ -147,7 +147,9 @@ int vgpu_pm_prepare_poweroff(struct device *dev)
         if (!g->power_on)
                 return 0;
 
-        ret = gk20a_channel_suspend(g);
+        if (g->ops.fifo.channel_suspend)
+                ret = g->ops.fifo.channel_suspend(g);
+
         if (ret)
                 return ret;
 
@@ -473,3 +475,35 @@ bool vgpu_is_reduced_bar1(struct gk20a *g)
 
         return resource_size(l->bar1_mem) == (resource_size_t)f->userd.size;
 }
+
+int vgpu_tegra_suspend(struct device *dev)
+{
+        struct tegra_vgpu_cmd_msg msg = {};
+        struct gk20a *g = get_gk20a(dev);
+        int err = 0;
+
+        msg.cmd = TEGRA_VGPU_CMD_SUSPEND;
+        msg.handle = vgpu_get_handle(g);
+        err = vgpu_comm_sendrecv(&msg, sizeof(msg), sizeof(msg));
+        err = err ? err : msg.ret;
+        if (err)
+                nvgpu_err(g, "vGPU suspend failed\n");
+
+        return err;
+}
+
+int vgpu_tegra_resume(struct device *dev)
+{
+        struct tegra_vgpu_cmd_msg msg = {};
+        struct gk20a *g = get_gk20a(dev);
+        int err = 0;
+
+        msg.cmd = TEGRA_VGPU_CMD_RESUME;
+        msg.handle = vgpu_get_handle(g);
+        err = vgpu_comm_sendrecv(&msg, sizeof(msg), sizeof(msg));
+        err = err ? err : msg.ret;
+        if (err)
+                nvgpu_err(g, "vGPU resume failed\n");
+
+        return err;
+}