[PATCH 05/13 v4] drm/i915: Debugfs interface to read GuC load status

Dave Gordon
2015-07-09T18:29:48Z

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

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

v2:
Changes to output formats per Chris Wilson's suggestions

v4:
Rebased

Issue: VIZ-4884
Signed-off-by: Alex Dai <yu.dai@intel.com>
Signed-off-by: Dave Gordon <david.s.gordon@intel.com>
---
drivers/gpu/drm/i915/i915_debugfs.c | 39 +++++++++++++++++++++++++++++++++++++
1 file changed, 39 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 98fd3c9..9ff5f17 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -2359,6 +2359,44 @@ static int i915_llc(struct seq_file *m, void *data)
return 0;
}

+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;
+ struct intel_guc_fw *guc_fw = &dev_priv->guc.guc_fw;
+ u32 tmp, i;
+
+ if (!HAS_GUC_UCODE(dev_priv->dev))
+ return 0;
+
+ seq_printf(m, "GuC firmware status:\n");
+ seq_printf(m, "\tpath: %s\n",
+ guc_fw->guc_fw_path);
+ seq_printf(m, "\tfetch: %s\n",
+ intel_guc_fw_status_repr(guc_fw->guc_fw_fetch_status));
+ seq_printf(m, "\tload: %s\n",
+ intel_guc_fw_status_repr(guc_fw->guc_fw_load_status));
+ seq_printf(m, "\tversion wanted: %d.%d\n",
+ guc_fw->guc_fw_major_wanted, guc_fw->guc_fw_minor_wanted);
+ seq_printf(m, "\tversion found: %d.%d\n",
+ guc_fw->guc_fw_major_found, guc_fw->guc_fw_minor_found);
+
+ 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:\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;
@@ -5073,6 +5111,7 @@ 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},
--
1.9.1