From a8b9370fc79c1ec043194452a455b0b590be609a Mon Sep 17 00:00:00 2001
From: Oscar Mateo <oscar.mateo@intel.com>
Date: Wed, 10 May 2017 15:04:51 +0000
Subject: [PATCH] drm/i915/guc: Dump the GuC stage descriptor pool in debugfs
Git-commit: a8b9370fc79c1ec043194452a455b0b590be609a
Patch-mainline: v4.13-rc1
References: FATE#322643 bsc#1055900

We are missing pieces of information that could be useful for GuC
debugging.

V2: Reuse some code (Joonas)

Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Signed-off-by: Oscar Mateo <oscar.mateo@intel.com>
[joonas: Removed extra newline and s/uint32_t/u32/ for checkpatch.pl]
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1494428691-20672-1-git-send-email-oscar.mateo@intel.com
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/gpu/drm/i915/i915_debugfs.c |   76 +++++++++++++++++++++++++++++++++---
 1 file changed, 71 insertions(+), 5 deletions(-)

--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -2498,22 +2498,33 @@ static void i915_guc_client_info(struct
 	seq_printf(m, "\tTotal: %llu\n", tot);
 }
 
-static int i915_guc_info(struct seq_file *m, void *data)
+static bool check_guc_submission(struct seq_file *m)
 {
 	struct drm_i915_private *dev_priv = node_to_i915(m->private);
 	const struct intel_guc *guc = &dev_priv->guc;
-	struct intel_engine_cs *engine;
-	enum intel_engine_id id;
-	u64 total;
 
 	if (!guc->execbuf_client) {
 		seq_printf(m, "GuC submission %s\n",
 			   HAS_GUC_SCHED(dev_priv) ?
 			   "disabled" :
 			   "not supported");
-		return 0;
+		return false;
 	}
 
+	return true;
+}
+
+static int i915_guc_info(struct seq_file *m, void *data)
+{
+	struct drm_i915_private *dev_priv = node_to_i915(m->private);
+	const struct intel_guc *guc = &dev_priv->guc;
+	struct intel_engine_cs *engine;
+	enum intel_engine_id id;
+	u64 total;
+
+	if (!check_guc_submission(m))
+		return 0;
+
 	seq_printf(m, "Doorbell map:\n");
 	seq_printf(m, "\t%*pb\n", GUC_NUM_DOORBELLS, guc->doorbell_bitmap);
 	seq_printf(m, "Doorbell next cacheline: 0x%x\n\n", guc->db_cacheline);
@@ -2544,6 +2555,60 @@ static int i915_guc_info(struct seq_file
 	return 0;
 }
 
+static int i915_guc_stage_pool(struct seq_file *m, void *data)
+{
+	struct drm_i915_private *dev_priv = node_to_i915(m->private);
+	const struct intel_guc *guc = &dev_priv->guc;
+	struct guc_stage_desc *desc = guc->stage_desc_pool_vaddr;
+	struct i915_guc_client *client = guc->execbuf_client;
+	unsigned int tmp;
+	int index;
+
+	if (!check_guc_submission(m))
+		return 0;
+
+	for (index = 0; index < GUC_MAX_STAGE_DESCRIPTORS; index++, desc++) {
+		struct intel_engine_cs *engine;
+
+		if (!(desc->attribute & GUC_STAGE_DESC_ATTR_ACTIVE))
+			continue;
+
+		seq_printf(m, "GuC stage descriptor %u:\n", index);
+		seq_printf(m, "\tIndex: %u\n", desc->stage_id);
+		seq_printf(m, "\tAttribute: 0x%x\n", desc->attribute);
+		seq_printf(m, "\tPriority: %d\n", desc->priority);
+		seq_printf(m, "\tDoorbell id: %d\n", desc->db_id);
+		seq_printf(m, "\tEngines used: 0x%x\n",
+			   desc->engines_used);
+		seq_printf(m, "\tDoorbell trigger phy: 0x%llx, cpu: 0x%llx, uK: 0x%x\n",
+			   desc->db_trigger_phy,
+			   desc->db_trigger_cpu,
+			   desc->db_trigger_uk);
+		seq_printf(m, "\tProcess descriptor: 0x%x\n",
+			   desc->process_desc);
+		seq_printf(m, "\tWorkqueue adddress: 0x%x, size: 0x%x\n",
+			   desc->wq_addr, desc->wq_size);
+		seq_putc(m, '\n');
+
+		for_each_engine_masked(engine, dev_priv, client->engines, tmp) {
+			u32 guc_engine_id = engine->guc_id;
+			struct guc_execlist_context *lrc =
+						&desc->lrc[guc_engine_id];
+
+			seq_printf(m, "\t%s LRC:\n", engine->name);
+			seq_printf(m, "\t\tContext desc: 0x%x\n",
+				   lrc->context_desc);
+			seq_printf(m, "\t\tContext id: 0x%x\n", lrc->context_id);
+			seq_printf(m, "\t\tLRCA: 0x%x\n", lrc->ring_lrca);
+			seq_printf(m, "\t\tRing begin: 0x%x\n", lrc->ring_begin);
+			seq_printf(m, "\t\tRing end: 0x%x\n", lrc->ring_end);
+			seq_putc(m, '\n');
+		}
+	}
+
+	return 0;
+}
+
 static int i915_guc_log_dump(struct seq_file *m, void *data)
 {
 	struct drm_i915_private *dev_priv = node_to_i915(m->private);
@@ -4750,6 +4815,7 @@ static const struct drm_info_list i915_d
 	{"i915_guc_info", i915_guc_info, 0},
 	{"i915_guc_load_status", i915_guc_load_status_info, 0},
 	{"i915_guc_log_dump", i915_guc_log_dump, 0},
+	{"i915_guc_stage_pool", i915_guc_stage_pool, 0},
 	{"i915_huc_load_status", i915_huc_load_status_info, 0},
 	{"i915_frequency_info", i915_frequency_info, 0},
 	{"i915_hangcheck_info", i915_hangcheck_info, 0},