intel/ds: report when OA metrics are unavailable

Promote DBG() failure paths in enumerate_sysfs_metrics() to mesa_logw()
so users see why OA metrics are unavailable without needing INTEL_DEBUG.
Also log in PPS when no OA queries are available after initialization.

Signed-off-by: Michael Cheng <michael.cheng@intel.com>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/40898>

src/intel/ds/intel_pps_driver.cc

@@ -80,13 +80,21 @@ bool IntelDriver::init_perfcnt()
 
    if (perf->cfg->features_supported & INTEL_PERF_FEATURE_OA_BLOCKED_BY_POLICY) {
       PPS_LOG_ERROR("OA metrics access blocked by system policy "
-                    "(gpu=%d, driver=%s). "
+                    "(gpu=%d, driver=%s): "
                     "Check kernel paranoid settings or run as root.",
                     drm_device.gpu_num,
                     drm_device.name.c_str());
       return false;
    }
 
+   if (perf->cfg->n_queries == 0) {
+      PPS_LOG_ERROR("No OA queries available for this device "
+                    "(gpu=%d, driver=%s)",
+                    drm_device.gpu_num,
+                    drm_device.name.c_str());
+      return false;
+   }
+
    const char *metric_set_name = os_get_option("INTEL_PERFETTO_METRIC_SET");
 
    struct intel_perf_query_info *default_query = nullptr;

src/intel/ds/intel_pps_perf.cc

@@ -8,7 +8,10 @@
 #include "intel_pps_perf.h"
 
 #include <math.h>
+#include <stdio.h>
 #include <sys/ioctl.h>
+#include <sys/stat.h>
+#include <unistd.h>
 #include <util/ralloc.h>
 #include <utility>
 

src/intel/perf/intel_perf.c

@@ -45,6 +45,7 @@
 
 #include "dev/intel_debug.h"
 #include "dev/intel_device_info.h"
+#include "util/log.h"
 #include "dev/virtio/intel_virtio.h"
 
 #include "perf/i915/intel_perf.h"
@@ -201,13 +202,13 @@ enumerate_sysfs_metrics(struct intel_perf_config *perf,
 
    len = snprintf(buf, sizeof(buf), "%s/metrics", perf->sysfs_dev_dir);
    if (len < 0 || len >= sizeof(buf)) {
-      DBG("Failed to concatenate path to sysfs metrics/ directory\n");
+      mesa_logw("intel_perf: failed to concatenate path to sysfs metrics/ directory\n");
       return;
    }
 
    metricsdir = opendir(buf);
    if (!metricsdir) {
-      DBG("Failed to open %s: %m\n", buf);
+      mesa_logw("intel_perf: failed to open OA metrics directory %s: %m\n", buf);
       return;
    }