[Intel-gfx] [PATCH 06/15] drm/i915: Debugfs interface to read GuC load status

[Dave Gordon]

From: Alex Dai <yu.dai at intel.com>

The new node provides access to the status of the common uC loader
code and the GuC-specific loader; also the scratch registers used
for communicatio between the i915 driver and the GuC firmware.

Issue: VIZ-4884
Signed-off-by: Alex Dai <yu.dai at intel.com>
Signed-off-by: Dave Gordon <david.s.gordon at intel.com>
---
 drivers/gpu/drm/i915/i915_debugfs.c |   37 +++++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 47636f3..c52a745 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -2352,6 +2352,42 @@ static int i915_llc(struct seq_file *m, void *data)
 	return 0;
 }
 
+static void i915_uc_load_status_info(struct seq_file *m, struct intel_uc_fw *uc_fw)
+{
+	seq_printf(m, "%s firmware status:\n\tpath: <%s>\n\tfetch: %d\n\tload: %d\n",
+			uc_fw->uc_name,
+			uc_fw->uc_fw_path,
+			uc_fw->uc_fw_fetch_status,
+			uc_fw->uc_fw_load_status);
+}
+
+static int i915_guc_load_status_info(struct seq_file *m, void *data)
+{
+	struct drm_info_node *node = m->private;
+	struct drm_i915_private *dev_priv = node->minor->dev->dev_private;
+	u32 tmp, i;
+
+	if (!HAS_GUC_UCODE(dev_priv->dev))
+		return 0;
+
+	i915_uc_load_status_info(m, &dev_priv->guc.guc_fw);
+
+	tmp = I915_READ(GUC_STATUS);
+
+	seq_printf(m, "\nGuC status 0x%08x:\n", tmp);
+	seq_printf(m, "\tBootrom status = 0x%x\n",
+		(tmp & GS_BOOTROM_MASK) >> GS_BOOTROM_SHIFT);
+	seq_printf(m, "\tuKernel status = 0x%x\n",
+		(tmp & GS_UKERNEL_MASK) >> GS_UKERNEL_SHIFT);
+	seq_printf(m, "\tMIA Core status = 0x%x\n",
+		(tmp & GS_MIA_MASK) >> GS_MIA_SHIFT);
+	seq_puts(m, "\nScratch registers value:\n");
+	for (i = 0; i < 16; i++)
+		seq_printf(m, "\t%2d: \t0x%x\n", i, I915_READ(SOFT_SCRATCH(i)));
+
+	return 0;
+}
+
 static int i915_edp_psr_status(struct seq_file *m, void *data)
 {
 	struct drm_info_node *node = m->private;
@@ -5046,6 +5082,7 @@ static const struct drm_info_list i915_debugfs_list[] = {
 	{"i915_gem_hws_bsd", i915_hws_info, 0, (void *)VCS},
 	{"i915_gem_hws_vebox", i915_hws_info, 0, (void *)VECS},
 	{"i915_gem_batch_pool", i915_gem_batch_pool_info, 0},
+	{"i915_guc_load_status", i915_guc_load_status_info, 0},
 	{"i915_frequency_info", i915_frequency_info, 0},
 	{"i915_hangcheck_info", i915_hangcheck_info, 0},
 	{"i915_drpc_info", i915_drpc_info, 0},
-- 
1.7.9.5