drm/vc4: Add gem_info node via debugfs for vc5

[platform/kernel/linux-rpi.git] / drivers / gpu / drm / vc4 / vc4_drv.c

diff --git a/drivers/gpu/drm/vc4/vc4_drv.c b/drivers/gpu/drm/vc4/vc4_drv.c
index 93a2cfa..9ada0ef 100644 (file)
--- a/drivers/gpu/drm/vc4/vc4_drv.c
+++ b/drivers/gpu/drm/vc4/vc4_drv.c
@@ -78,6 +78,41 @@ int vc4_dumb_fixup_args(struct drm_mode_create_dumb *args)
        return 0;
 }
 
+static void vc5_gem_register_pid(struct drm_file *file_priv)
+{
+       struct vc4_file *vc4file = file_priv->driver_priv;
+       struct drm_vc5_file_private *driver_priv = &vc4file->priv;
+
+       if (!driver_priv->pid && !driver_priv->tgid) {
+               driver_priv->pid = task_pid_nr(current);
+               driver_priv->tgid = task_tgid_nr(current);
+       } else {
+               if (driver_priv->pid != task_pid_nr(current))
+                       DRM_DEBUG_KMS("wrong pid: %ld, %ld\n",
+                                       (unsigned long)driver_priv->pid,
+                                       (unsigned long)task_pid_nr(current));
+               if (driver_priv->tgid != task_tgid_nr(current))
+                       DRM_DEBUG_KMS("wrong tgid: %ld, %ld\n",
+                                       (unsigned long)driver_priv->tgid,
+                                       (unsigned long)task_tgid_nr(current));
+       }
+}
+
+int vc5_drm_gem_prime_fd_to_handle(struct drm_device *dev,
+                                  struct drm_file *file_priv, int prime_fd,
+                                  uint32_t *handle)
+{
+       int ret;
+
+       ret = drm_gem_prime_fd_to_handle(dev, file_priv, prime_fd, handle);
+       if (ret < 0)
+               return ret;
+
+       vc5_gem_register_pid(file_priv);
+
+       return ret;
+}
+
 static int vc4_dumb_create(struct drm_file *file_priv,
                           struct drm_device *dev,
                           struct drm_mode_create_dumb *args)
@@ -88,7 +123,11 @@ static int vc4_dumb_create(struct drm_file *file_priv,
        if (ret)
                return ret;
 
-       return drm_gem_cma_dumb_create_internal(file_priv, dev, args);
+       ret = drm_gem_cma_dumb_create_internal(file_priv, dev, args);
+       if (!ret)
+               vc5_gem_register_pid(file_priv);
+
+       return ret;
 }
 
 static int vc4_get_param_ioctl(struct drm_device *dev, void *data,
@@ -178,6 +217,27 @@ static void vc4_close(struct drm_device *dev, struct drm_file *file)
        kfree(vc4file);
 }
 
+static int vc5_open(struct drm_device *dev, struct drm_file *file)
+{
+       struct vc4_dev *vc4 = to_vc4_dev(dev);
+       struct vc4_file *vc4file;
+
+       vc4file = kzalloc(sizeof(*vc4file), GFP_KERNEL);
+       if (!vc4file)
+               return -ENOMEM;
+       vc4file->dev = vc4;
+
+       file->driver_priv = vc4file;
+       return 0;
+}
+
+static void vc5_close(struct drm_device *dev, struct drm_file *file)
+{
+       struct vc4_file *vc4file = file->driver_priv;
+
+       kfree(vc4file);
+}
+
 DEFINE_DRM_GEM_FOPS(vc4_drm_fops);
 
 static const struct drm_ioctl_desc vc4_drm_ioctls[] = {
@@ -233,12 +293,15 @@ static const struct drm_driver vc5_drm_driver = {
                            DRIVER_ATOMIC |
                            DRIVER_GEM),
 
+       .open = vc5_open,
+       .postclose = vc5_close,
 #if defined(CONFIG_DEBUG_FS)
        .debugfs_init = vc4_debugfs_init,
 #endif
 
        DRM_GEM_CMA_DRIVER_OPS_WITH_DUMB_CREATE(vc4_dumb_create),
 
+       .prime_fd_to_handle = vc5_drm_gem_prime_fd_to_handle,
        .fops = &vc4_drm_fops,
 
        .name = DRIVER_NAME,
@@ -303,6 +366,23 @@ static bool firmware_kms(void)
               "raspberrypi,rpi-firmware-kms-2711"));
 }
 
+int vc5_bo_debugfs_init(struct drm_minor *minor)
+{
+       struct drm_device *drm = minor->dev;
+       struct vc4_dev *vc4 = to_vc4_dev(drm);
+       int ret;
+
+       if (!vc4->is_vc5)
+               return -ENODEV;
+
+       ret = vc4_debugfs_add_file(minor, "gem_info",
+                                  vc5_debugfs_gem_info, NULL);
+       if (ret)
+               return ret;
+
+       return 0;
+}
+
 static int vc4_drm_bind(struct device *dev)
 {
        struct platform_device *pdev = to_platform_device(dev);