drm/i915/guc: Dump the GuC stage descriptor pool in debugfs

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

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 7830337..bd9abef 100644 (file)
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -2494,22 +2494,33 @@ static void i915_guc_client_info(struct seq_file *m,
        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);
@@ -2540,6 +2551,60 @@ static int i915_guc_info(struct seq_file *m, void *data)
        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);
@@ -4746,6 +4811,7 @@ static const struct drm_info_list i915_debugfs_list[] = {
        {"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},