gpu: nvgpu: add sched control API

Added a dedicated device node to allow an
app manager to control TSG scheduling parameters:
- Get list of TSGs
- Get list of recent TSGs
- Get list of TSGs per pid
- Get TSG current scheduling parameters
- Set TSG timeslice
- Set TSG runlist interleave

Jira VFND-1586

Change-Id: I014c9d1534bce0eaea6c25ad114cf0cff317af79
Signed-off-by: Thomas Fleury <tfleury@nvidia.com>
Reviewed-on: http://git-master/r/1160384
(cherry picked from commit 75ca739517cc7f7f76714b5f6a1a57c39b8cb38e)
Reviewed-on: http://git-master/r/1167021
Reviewed-by: Richard Zhao <rizhao@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Alex Waterman <alexw@nvidia.com>
Reviewed-by: Vijayakumar Subbu <vsubbu@nvidia.com>

1 files changed, 32 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/gk20a.c b/drivers/gpu/nvgpu/gk20a/gk20a.c
index 9255c847..822cd3ff 100644
--- a/drivers/gpu/nvgpu/gk20a/gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/gk20a.c
@@ -246,6 +246,18 @@ static const struct file_operations gk20a_ctxsw_ops = {
         .mmap = gk20a_ctxsw_dev_mmap,
 };
 
+static const struct file_operations gk20a_sched_ops = {
+        .owner = THIS_MODULE,
+        .release = gk20a_sched_dev_release,
+        .open = gk20a_sched_dev_open,
+#ifdef CONFIG_COMPAT
+        .compat_ioctl = gk20a_sched_dev_ioctl,
+#endif
+        .unlocked_ioctl = gk20a_sched_dev_ioctl,
+        .poll = gk20a_sched_dev_poll,
+        .read = gk20a_sched_dev_read,
+};
+
 static inline void sim_writel(struct gk20a *g, u32 r, u32 v)
 {
         writel(v, g->sim.regs+r);
@@ -965,6 +977,12 @@ int gk20a_pm_finalize_poweron(struct device *dev)
         if (err)
                 gk20a_warn(dev, "could not initialize ctxsw tracing");
 
+        err = gk20a_sched_ctrl_init(g);
+        if (err) {
+                gk20a_err(dev, "failed to init sched control");
+                goto done;
+        }
+
         /* Restore the debug setting */
         g->ops.mm.set_debug_mode(g, g->mmu_debug_ctrl);
 
@@ -1101,6 +1119,11 @@ void gk20a_user_deinit(struct device *dev, struct class *class)
                 cdev_del(&g->ctxsw.cdev);
         }
 
+        if (g->sched.node) {
+                device_destroy(&nvgpu_class, g->sched.cdev.dev);
+                cdev_del(&g->sched.cdev);
+        }
+
         if (g->cdev_region)
                 unregister_chrdev_region(g->cdev_region, GK20A_NUM_CDEVS);
 }
@@ -1170,6 +1193,12 @@ int gk20a_user_init(struct device *dev, const char *interface_name,
                 goto fail;
 #endif
 
+        err = gk20a_create_device(dev, devno++, interface_name, "-sched",
+                                  &g->sched.cdev, &g->sched.node,
+                                  &gk20a_sched_ops,
+                                  class);
+        if (err)
+                goto fail;
 
         return 0;
 fail:
@@ -1632,6 +1661,7 @@ static int gk20a_probe(struct platform_device *dev)
         gk20a_alloc_debugfs_init(dev);
         gk20a_mm_debugfs_init(&dev->dev);
         gk20a_fifo_debugfs_init(&dev->dev);
+        gk20a_sched_debugfs_init(&dev->dev);
 #endif
 
         gk20a_init_gr(gk20a);
@@ -1655,6 +1685,8 @@ static int __exit gk20a_remove(struct platform_device *pdev)
 
         gk20a_ctxsw_trace_cleanup(g);
 
+        gk20a_sched_ctrl_cleanup(g);
+
         if (IS_ENABLED(CONFIG_GK20A_DEVFREQ))
                 gk20a_scale_exit(dev);