1 files changed, 53 insertions, 1 deletions

diff --git a/drivers/gpu/drm/etnaviv/etnaviv_drv.c b/drivers/gpu/drm/etnaviv/etnaviv_drv.c
index 1d2b4fb4bcf8..44ca803237a5 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_drv.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_drv.c
@@ -22,6 +22,7 @@
 #include "etnaviv_gem.h"
 #include "etnaviv_mmu.h"
 #include "etnaviv_perfmon.h"
+#include "common.xml.h"
 
 /*
  * DRM operations:
@@ -56,6 +57,11 @@ static int etnaviv_open(struct drm_device *dev, struct drm_file *file)
 	if (!ctx)
 		return -ENOMEM;
 
+	ret = xa_alloc_cyclic(&priv->active_contexts, &ctx->id, ctx,
+			      xa_limit_32b, &priv->next_context_id, GFP_KERNEL);
+	if (ret < 0)
+		goto out_free;
+
 	ctx->mmu = etnaviv_iommu_context_init(priv->mmu_global,
 					      priv->cmdbuf_suballoc);
 	if (!ctx->mmu) {
@@ -99,6 +105,8 @@ static void etnaviv_postclose(struct drm_device *dev, struct drm_file *file)
 
 	etnaviv_iommu_context_put(ctx->mmu);
 
+	xa_erase(&priv->active_contexts, ctx->id);
+
 	kfree(ctx);
 }
 
@@ -468,7 +476,47 @@ static const struct drm_ioctl_desc etnaviv_ioctls[] = {
 	ETNA_IOCTL(PM_QUERY_SIG, pm_query_sig, DRM_RENDER_ALLOW),
 };
 
-DEFINE_DRM_GEM_FOPS(fops);
+static void etnaviv_fop_show_fdinfo(struct seq_file *m, struct file *f)
+{
+	struct drm_file *file = f->private_data;
+	struct drm_device *dev = file->minor->dev;
+	struct etnaviv_drm_private *priv = dev->dev_private;
+	struct etnaviv_file_private *ctx = file->driver_priv;
+
+	/*
+	 * For a description of the text output format used here, see
+	 * Documentation/gpu/drm-usage-stats.rst.
+	 */
+	seq_printf(m, "drm-driver:\t%s\n", dev->driver->name);
+	seq_printf(m, "drm-client-id:\t%u\n", ctx->id);
+
+	for (int i = 0; i < ETNA_MAX_PIPES; i++) {
+		struct etnaviv_gpu *gpu = priv->gpu[i];
+		char engine[10] = "UNK";
+		int cur = 0;
+
+		if (!gpu)
+			continue;
+
+		if (gpu->identity.features & chipFeatures_PIPE_2D)
+			cur = snprintf(engine, sizeof(engine), "2D");
+		if (gpu->identity.features & chipFeatures_PIPE_3D)
+			cur = snprintf(engine + cur, sizeof(engine) - cur,
+				       "%s3D", cur ? "/" : "");
+		if (gpu->identity.nn_core_count > 0)
+			cur = snprintf(engine + cur, sizeof(engine) - cur,
+				       "%sNN", cur ? "/" : "");
+
+		seq_printf(m, "drm-engine-%s:\t%llu ns\n", engine,
+			   ctx->sched_entity[i].elapsed_ns);
+	}
+}
+
+static const struct file_operations fops = {
+	.owner = THIS_MODULE,
+	DRM_GEM_FOPS,
+	.show_fdinfo = etnaviv_fop_show_fdinfo,
+};
 
 static const struct drm_driver etnaviv_drm_driver = {
 	.driver_features    = DRIVER_GEM | DRIVER_RENDER,
@@ -514,6 +562,8 @@ static int etnaviv_bind(struct device *dev)
 
 	dma_set_max_seg_size(dev, SZ_2G);
 
+	xa_init_flags(&priv->active_contexts, XA_FLAGS_ALLOC);
+
 	mutex_init(&priv->gem_lock);
 	INIT_LIST_HEAD(&priv->gem_list);
 	priv->num_gpus = 0;
@@ -563,6 +613,8 @@ static void etnaviv_unbind(struct device *dev)
 
 	etnaviv_cmdbuf_suballoc_destroy(priv->cmdbuf_suballoc);
 
+	xa_destroy(&priv->active_contexts);
+
 	drm->dev_private = NULL;
 	kfree(priv);