tools/power/turbostat: Add support for Xe sysfs knobs

Xe graphics driver uses different graphics sysfs knobs including
   /sys/class/drm/card0/device/tile0/gt0/gtidle/idle_residency_ms
   /sys/class/drm/card0/device/tile0/gt0/freq0/cur_freq
   /sys/class/drm/card0/device/tile0/gt0/freq0/act_freq
   /sys/class/drm/card0/device/tile0/gt1/gtidle/idle_residency_ms
   /sys/class/drm/card0/device/tile0/gt1/freq0/cur_freq
   /sys/class/drm/card0/device/tile0/gt1/freq0/act_freq

Plus that,
   /sys/class/drm/card0/device/tile0/gt<n>/gtidle/name
returns either gt<n>-rc or gt<n>-mc. rc is for GFX and mc is SA Media.

Enhance turbostat to prefer the Xe sysfs knobs when they are available.
Export gt<n>-rc via BIC_GFX_rc6/BIC_GFXMHz/BIC_GFXACTMHz.
Export gt<n>-mc via BIC_SMA_mc6/BIC_SMAMHz/BIC_SMAACTMHz.

Signed-off-by: Zhang Rui <rui.zhang@intel.com>

diff --git a/tools/power/x86/turbostat/turbostat.c b/tools/power/x86/turbostat/turbostat.c
index feca7f4cb5cda7a50749a9c689001151875e91cf..bc103851df70b9a68db7c34124a710294980aa07 100644 (file)
--- a/tools/power/x86/turbostat/turbostat.c
+++ b/tools/power/x86/turbostat/turbostat.c
@@ -5380,6 +5380,57 @@ probe_cluster:
 
 static void probe_graphics(void)
 {
+       /* Xe graphics sysfs knobs */
+       if (!access("/sys/class/drm/card0/device/tile0/gt0/gtidle/idle_residency_ms", R_OK)) {
+               FILE *fp;
+               char buf[8];
+               bool gt0_is_gt;
+               int idx;
+
+               fp = fopen("/sys/class/drm/card0/device/tile0/gt0/gtidle/name", "r");
+               if (!fp)
+                       goto next;
+
+               if (!fread(buf, sizeof(char), 7, fp)) {
+                       fclose(fp);
+                       goto next;
+               }
+               fclose(fp);
+
+               if (!strncmp(buf, "gt0-rc", strlen("gt0-rc")))
+                       gt0_is_gt = true;
+               else if (!strncmp(buf, "gt0-mc", strlen("gt0-mc")))
+                       gt0_is_gt = false;
+               else
+                       goto next;
+
+               idx = gt0_is_gt ? GFX_rc6 : SAM_mc6;
+               gfx_info[idx].path = "/sys/class/drm/card0/device/tile0/gt0/gtidle/idle_residency_ms";
+
+               idx = gt0_is_gt ? GFX_MHz : SAM_MHz;
+               if (!access("/sys/class/drm/card0/device/tile0/gt0/freq0/cur_freq", R_OK))
+                       gfx_info[idx].path = "/sys/class/drm/card0/device/tile0/gt0/freq0/cur_freq";
+
+               idx = gt0_is_gt ? GFX_ACTMHz : SAM_ACTMHz;
+               if (!access("/sys/class/drm/card0/device/tile0/gt0/freq0/act_freq", R_OK))
+                       gfx_info[idx].path = "/sys/class/drm/card0/device/tile0/gt0/freq0/act_freq";
+
+               idx = gt0_is_gt ? SAM_mc6 : GFX_rc6;
+               if (!access("/sys/class/drm/card0/device/tile0/gt1/gtidle/idle_residency_ms", R_OK))
+                       gfx_info[idx].path = "/sys/class/drm/card0/device/tile0/gt1/gtidle/idle_residency_ms";
+
+               idx = gt0_is_gt ? SAM_MHz : GFX_MHz;
+               if (!access("/sys/class/drm/card0/device/tile0/gt1/freq0/cur_freq", R_OK))
+                       gfx_info[idx].path = "/sys/class/drm/card0/device/tile0/gt1/freq0/cur_freq";
+
+               idx = gt0_is_gt ? SAM_ACTMHz : GFX_ACTMHz;
+               if (!access("/sys/class/drm/card0/device/tile0/gt1/freq0/act_freq", R_OK))
+                       gfx_info[idx].path = "/sys/class/drm/card0/device/tile0/gt1/freq0/act_freq";
+
+               goto end;
+       }
+
+next:
        /* New i915 graphics sysfs knobs */
        if (!access("/sys/class/drm/card0/gt/gt0/rc6_residency_ms", R_OK)) {
                gfx_info[GFX_rc6].path = "/sys/class/drm/card0/gt/gt0/rc6_residency_ms";