drm/i915/uc: Extract uc usage details into separate debugfs

It has been pointed out that information about HuC usage doesn't belong
in guc_info debugfs. Let's move "supported/used/wanted" matrix to a
separate debugfs file, keeping guc_info strictly about GuC.
Suggested-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Signed-off-by: Michał Winiarski <michal.winiarski@intel.com>
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: Lukasz Fiedorowicz <lukasz.fiedorowicz@intel.com>
Cc: Michal Wajdeczko <michal.wajdeczko@intel.com>
Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20200708100843.297655-1-michal@hardline.pl

drivers/gpu/drm/i915/gt/uc/intel_guc.c

@@ -733,28 +733,19 @@ int intel_guc_allocate_and_map_vma(struct intel_guc *guc, u32 size,
  */
 void intel_guc_load_status(struct intel_guc *guc, struct drm_printer *p)
 {
-	struct intel_uc *uc = container_of(guc, struct intel_uc, guc);
 	struct intel_gt *gt = guc_to_gt(guc);
 	struct intel_uncore *uncore = gt->uncore;
 	intel_wakeref_t wakeref;
 
-	drm_printf(p, "[guc] supported:%s wanted:%s used:%s\n",
-		   yesno(intel_uc_supports_guc(uc)),
-		   yesno(intel_uc_wants_guc(uc)),
-		   yesno(intel_uc_uses_guc(uc)));
-	drm_printf(p, "[huc] supported:%s wanted:%s used:%s\n",
-		   yesno(intel_uc_supports_huc(uc)),
-		   yesno(intel_uc_wants_huc(uc)),
-		   yesno(intel_uc_uses_huc(uc)));
-	drm_printf(p, "[submission] supported:%s wanted:%s used:%s\n",
-		   yesno(intel_uc_supports_guc_submission(uc)),
-		   yesno(intel_uc_wants_guc_submission(uc)),
-		   yesno(intel_uc_uses_guc_submission(uc)));
-
-	if (!intel_guc_is_supported(guc) || !intel_guc_is_wanted(guc))
+	if (!intel_guc_is_supported(guc)) {
+		drm_printf(p, "GuC not supported\n");
 		return;
+	}
 
-	drm_puts(p, "\n");
+	if (!intel_guc_is_wanted(guc)) {
+		drm_printf(p, "GuC disabled\n");
+		return;
+	}
 
 	intel_uc_fw_dump(&guc->fw, p);
 

drivers/gpu/drm/i915/gt/uc/intel_uc_debugfs.c

@@ -4,14 +4,41 @@
  */
 
 #include <linux/debugfs.h>
+#include <drm/drm_print.h>
 
+#include "gt/debugfs_gt.h"
 #include "intel_guc_debugfs.h"
 #include "intel_huc_debugfs.h"
 #include "intel_uc.h"
 #include "intel_uc_debugfs.h"
 
+static int uc_usage_show(struct seq_file *m, void *data)
+{
+	struct intel_uc *uc = m->private;
+	struct drm_printer p = drm_seq_file_printer(m);
+
+	drm_printf(&p, "[guc] supported:%s wanted:%s used:%s\n",
+		   yesno(intel_uc_supports_guc(uc)),
+		   yesno(intel_uc_wants_guc(uc)),
+		   yesno(intel_uc_uses_guc(uc)));
+	drm_printf(&p, "[huc] supported:%s wanted:%s used:%s\n",
+		   yesno(intel_uc_supports_huc(uc)),
+		   yesno(intel_uc_wants_huc(uc)),
+		   yesno(intel_uc_uses_huc(uc)));
+	drm_printf(&p, "[submission] supported:%s wanted:%s used:%s\n",
+		   yesno(intel_uc_supports_guc_submission(uc)),
+		   yesno(intel_uc_wants_guc_submission(uc)),
+		   yesno(intel_uc_uses_guc_submission(uc)));
+
+	return 0;
+}
+DEFINE_GT_DEBUGFS_ATTRIBUTE(uc_usage);
+
 void intel_uc_debugfs_register(struct intel_uc *uc, struct dentry *gt_root)
 {
+	static const struct debugfs_gt_file files[] = {
+		{ "usage", &uc_usage_fops, NULL },
+	};
 	struct dentry *root;
 
 	if (!gt_root)
@@ -25,6 +52,8 @@ void intel_uc_debugfs_register(struct intel_uc *uc, struct dentry *gt_root)
 	if (IS_ERR(root))
 		return;
 
+	intel_gt_debugfs_register_files(root, files, ARRAY_SIZE(files), uc);
+
 	intel_guc_debugfs_register(&uc->guc, root);
 	intel_huc_debugfs_register(&uc->huc, root);
 }