Re: [PATCH 1/2] drm/i915/uc: Extract uc usage details into separate debugfs

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On 7/7/2020 2:52 PM, Michał Winiarski wrote:
From: Michał Winiarski <michal.winiarski@xxxxxxxxx>

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@xxxxxxxxx>
Signed-off-by: Michał Winiarski <michal.winiarski@xxxxxxxxx>
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@xxxxxxxxx>
Cc: Lukasz Fiedorowicz <lukasz.fiedorowicz@xxxxxxxxx>
Cc: Michal Wajdeczko <michal.wajdeczko@xxxxxxxxx>

Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@xxxxxxxxx>

Daniele

---
  drivers/gpu/drm/i915/gt/uc/intel_guc.c        | 23 +++++----------
  drivers/gpu/drm/i915/gt/uc/intel_uc_debugfs.c | 29 +++++++++++++++++++
  2 files changed, 36 insertions(+), 16 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc.c b/drivers/gpu/drm/i915/gt/uc/intel_guc.c
index 446a41946f56..861657897c0f 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc.c
+++ b/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); diff --git a/drivers/gpu/drm/i915/gt/uc/intel_uc_debugfs.c b/drivers/gpu/drm/i915/gt/uc/intel_uc_debugfs.c
index 9d16b784aa0d..089d98662f46 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_uc_debugfs.c
+++ b/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);
  }

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