[RFC 17/22] drm/i915/slpc: Add i915_slpc_info to debugfs

[tom.orourke@intel.com]

From: Tom O'Rourke <Tom.O'Rourke@intel.com>

i915_slpc_info shows the contents of SLPC shared data
parsed into text format.

Signed-off-by: Tom O'Rourke <Tom.O'Rourke@intel.com>
---
 drivers/gpu/drm/i915/i915_debugfs.c | 161 ++++++++++++++++++++++++++++++++++++
 1 file changed, 161 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index b995d4e..3fc8f83 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -1121,6 +1121,166 @@ DEFINE_SIMPLE_ATTRIBUTE(i915_next_seqno_fops,
 			i915_next_seqno_get, i915_next_seqno_set,
 			"0x%llx\n");
 
+static int i915_slpc_info(struct seq_file *m, void *unused)
+{
+	struct drm_info_node *node = m->private;
+	struct drm_device *dev = node->minor->dev;
+	struct drm_i915_private *dev_priv = dev->dev_private;
+	struct drm_i915_gem_object *obj;
+	struct page *page;
+	struct slpc_shared_data *data = NULL;
+	int ret = 0;
+	int i, value;
+	enum slpc_global_state global_state;
+	enum slpc_platform_sku platform_sku;
+	enum slpc_power_plan power_plan;
+	enum slpc_power_source power_source;
+
+	if (HAS_SLPC(dev)) {
+		obj = dev_priv->guc.slpc.shared_data_obj;
+		if (obj) {
+			page = i915_gem_object_get_page(obj, 0);
+			if (page)
+				data = kmap_atomic(page);
+		}
+	}
+
+	if (data) {
+		seq_printf(m, "SLPC Version: %d.%d.%d (0x%8x)\n",
+			   data->slpc_version >> 16,
+			   (data->slpc_version >> 8) & 0xFF,
+			   data->slpc_version & 0xFF,
+			   data->slpc_version);
+		seq_printf(m, "shared data size: %d\n", data->shared_data_size);
+
+		seq_printf(m, "global state: (%d) ", data->global_state);
+		global_state = (enum slpc_global_state) data->global_state;
+		switch (global_state) {
+		case SLPC_GLOBAL_STATE_NOT_RUNNING:
+			seq_puts(m, "not running\n");
+			break;
+		case SLPC_GLOBAL_STATE_INITIALIZING:
+			seq_puts(m, "initializing\n");
+			break;
+		case SLPC_GLOBAL_STATE_RESETING:
+			seq_puts(m, "resetting\n");
+			break;
+		case SLPC_GLOBAL_STATE_RUNNING:
+			seq_puts(m, "running\n");
+			break;
+		case SLPC_GLOBAL_STATE_SHUTTING_DOWN:
+			seq_puts(m, "shutting down\n");
+			break;
+		case SLPC_GLOBAL_STATE_ERROR:
+			seq_puts(m, "error\n");
+			break;
+		default:
+			seq_puts(m, "unknown\n");
+			break;
+		}
+
+		seq_printf(m, "sku: (%d) ", data->platform_info.platform_sku);
+		platform_sku = (enum slpc_platform_sku)
+				data->platform_info.platform_sku;
+		switch (platform_sku) {
+		case SLPC_PLATFORM_SKU_UNDEFINED:
+			seq_puts(m, "undefined\n");
+			break;
+		case SLPC_PLATFORM_SKU_ULX:
+			seq_puts(m, "ULX\n");
+			break;
+		case SLPC_PLATFORM_SKU_ULT:
+			seq_puts(m, "ULT\n");
+			break;
+		case SLPC_PLATFORM_SKU_T:
+			seq_puts(m, "T\n");
+			break;
+		case SLPC_PLATFORM_SKU_MOBL:
+			seq_puts(m, "Mobile\n");
+			break;
+		case SLPC_PLATFORM_SKU_DT:
+			seq_puts(m, "DT\n");
+			break;
+		case SLPC_PLATFORM_SKU_UNKNOWN:
+		default:
+			seq_puts(m, "unknown\n");
+			break;
+		}
+		seq_printf(m, "slice count: %d\n",
+			   data->platform_info.slice_count);
+
+		seq_printf(m, "power plan/source : (0x%x) ",
+			   data->platform_info.power_plan_source);
+		power_plan = (enum slpc_power_plan)
+			      data->platform_info.power_plan_source & 0x3F;
+		power_source = (enum slpc_power_source)
+				data->platform_info.power_plan_source >> 6;
+		switch (power_plan) {
+		case SLPC_POWER_PLAN_UNDEFINED:
+			seq_puts(m, "undefined / ");
+			break;
+		case SLPC_POWER_PLAN_BATTERY_SAVER:
+			seq_puts(m, "battery saver / ");
+			break;
+		case SLPC_POWER_PLAN_BALANCED:
+			seq_puts(m, "balanced / ");
+			break;
+		case SLPC_POWER_PLAN_PERFORMANCE:
+			seq_puts(m, "performance / ");
+			break;
+		case SLPC_POWER_PLAN_UNKNOWN:
+		default:
+			seq_puts(m, "unknown / ");
+			break;
+		}
+		switch (power_source) {
+		case SLPC_POWER_SOURCE_UNDEFINED:
+			seq_puts(m, "undefined\n");
+			break;
+		case SLPC_POWER_SOURCE_AC:
+			seq_puts(m, "AC\n");
+			break;
+		case SLPC_POWER_SOURCE_DC:
+			seq_puts(m, "DC\n");
+			break;
+		case SLPC_POWER_SOURCE_UNKNOWN:
+		default:
+			seq_puts(m, "unknown\n");
+			break;
+		}
+
+		seq_printf(m, "IA frequency (MHz): P0 %d P1 %d Pe %d Pn %d\n",
+			   data->platform_info.P0_freq * 50,
+			   data->platform_info.P1_freq * 50,
+			   data->platform_info.Pe_freq * 50,
+			   data->platform_info.Pn_freq * 50);
+		seq_printf(m, "RAPL package power limits: 0x%8x 0x%8x\n",
+			   data->platform_info.package_rapl_limit_high,
+			   data->platform_info.package_rapl_limit_low);
+		seq_printf(m, "task state data: 0x%8x\n",
+			   data->task_state_data);
+
+		seq_puts(m, "override parameter bitfield\n");
+		for (i=0; i < SLPC_OVERRIDE_BITFIELD_SIZE; i++)
+			seq_printf(m, "%d: 0x%8x\n", i,
+				   data->override_parameters_set_bits[i]);
+
+		seq_puts(m, "override parameters (only non-zero shown)\n");
+		for (i=0; i < SLPC_MAX_OVERRIDE_PARAMETERS; i++) {
+			value = data->override_parameters_values[i];
+			if (value)
+				seq_printf(m, "%d: 0x%8x\n", i, value);
+		}
+
+		kunmap_atomic(data);
+
+	} else {
+		seq_puts(m, "no SLPC info available\n");
+	}
+
+	return ret;
+}
+
 static int i915_frequency_info(struct seq_file *m, void *unused)
 {
 	struct drm_info_node *node = m->private;
@@ -5349,6 +5509,7 @@ 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_slpc_info", i915_slpc_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

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