1 files changed, 135 insertions, 0 deletions
diff --git a/drivers/gpu/drm/xe/xe_tile_debugfs.c b/drivers/gpu/drm/xe/xe_tile_debugfs.c
new file mode 100644
index 000000000000..5523874cba7b
--- /dev/null
+++ b/drivers/gpu/drm/xe/xe_tile_debugfs.c
@@ -0,0 +1,135 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2025 Intel Corporation
+ */
+
+#include <linux/debugfs.h>
+#include <drm/drm_debugfs.h>
+
+#include "xe_pm.h"
+#include "xe_sa.h"
+#include "xe_tile_debugfs.h"
+
+static struct xe_tile *node_to_tile(struct drm_info_node *node)
+{
+	return node->dent->d_parent->d_inode->i_private;
+}
+
+/**
+ * tile_debugfs_simple_show - A show callback for struct drm_info_list
+ * @m: the &seq_file
+ * @data: data used by the drm debugfs helpers
+ *
+ * This callback can be used in struct drm_info_list to describe debugfs
+ * files that are &xe_tile specific.
+ *
+ * It is assumed that those debugfs files will be created on directory entry
+ * which struct dentry d_inode->i_private points to &xe_tile.
+ *
+ *      /sys/kernel/debug/dri/0/
+ *      ├── tile0/		# tile = dentry->d_inode->i_private
+ *      │   │   ├── id		# tile = dentry->d_parent->d_inode->i_private
+ *
+ * This function assumes that &m->private will be set to the &struct
+ * drm_info_node corresponding to the instance of the info on a given &struct
+ * drm_minor (see struct drm_info_list.show for details).
+ *
+ * This function also assumes that struct drm_info_list.data will point to the
+ * function code that will actually print a file content::
+ *
+ *   int (*print)(struct xe_tile *, struct drm_printer *)
+ *
+ * Example::
+ *
+ *    int tile_id(struct xe_tile *tile, struct drm_printer *p)
+ *    {
+ *        drm_printf(p, "%u\n", tile->id);
+ *        return 0;
+ *    }
+ *
+ *    static const struct drm_info_list info[] = {
+ *        { name = "id", .show = tile_debugfs_simple_show, .data = tile_id },
+ *    };
+ *
+ *    dir = debugfs_create_dir("tile0", parent);
+ *    dir->d_inode->i_private = tile;
+ *    drm_debugfs_create_files(info, ARRAY_SIZE(info), dir, minor);
+ *
+ * Return: 0 on success or a negative error code on failure.
+ */
+static int tile_debugfs_simple_show(struct seq_file *m, void *data)
+{
+	struct drm_printer p = drm_seq_file_printer(m);
+	struct drm_info_node *node = m->private;
+	struct xe_tile *tile = node_to_tile(node);
+	int (*print)(struct xe_tile *, struct drm_printer *) = node->info_ent->data;
+
+	return print(tile, &p);
+}
+
+/**
+ * tile_debugfs_show_with_rpm - A show callback for struct drm_info_list
+ * @m: the &seq_file
+ * @data: data used by the drm debugfs helpers
+ *
+ * Similar to tile_debugfs_simple_show() but implicitly takes a RPM ref.
+ *
+ * Return: 0 on success or a negative error code on failure.
+ */
+static int tile_debugfs_show_with_rpm(struct seq_file *m, void *data)
+{
+	struct drm_info_node *node = m->private;
+	struct xe_tile *tile = node_to_tile(node);
+	struct xe_device *xe = tile_to_xe(tile);
+	int ret;
+
+	xe_pm_runtime_get(xe);
+	ret = tile_debugfs_simple_show(m, data);
+	xe_pm_runtime_put(xe);
+
+	return ret;
+}
+
+static int sa_info(struct xe_tile *tile, struct drm_printer *p)
+{
+	drm_suballoc_dump_debug_info(&tile->mem.kernel_bb_pool->base, p,
+				     xe_sa_manager_gpu_addr(tile->mem.kernel_bb_pool));
+
+	return 0;
+}
+
+/* only for debugfs files which can be safely used on the VF */
+static const struct drm_info_list vf_safe_debugfs_list[] = {
+	{ "sa_info", .show = tile_debugfs_show_with_rpm, .data = sa_info },
+};
+
+/**
+ * xe_tile_debugfs_register - Register tile's debugfs attributes
+ * @tile: the &xe_tile to register
+ *
+ * Create debugfs sub-directory with a name that includes a tile ID and
+ * then creates set of debugfs files (attributes) specific to this tile.
+ */
+void xe_tile_debugfs_register(struct xe_tile *tile)
+{
+	struct xe_device *xe = tile_to_xe(tile);
+	struct drm_minor *minor = xe->drm.primary;
+	struct dentry *root = minor->debugfs_root;
+	char name[8];
+
+	snprintf(name, sizeof(name), "tile%u", tile->id);
+	tile->debugfs = debugfs_create_dir(name, root);
+	if (IS_ERR(tile->debugfs))
+		return;
+
+	/*
+	 * Store the xe_tile pointer as private data of the tile/ directory
+	 * node so other tile specific attributes under that directory may
+	 * refer to it by looking at its parent node private data.
+	 */
+	tile->debugfs->d_inode->i_private = tile;
+
+	drm_debugfs_create_files(vf_safe_debugfs_list,
+				 ARRAY_SIZE(vf_safe_debugfs_list),
+				 tile->debugfs, minor);
+}