drm/xe/vf: Custom hardware config load step if VF

The VF drivers may immediately communicate with the GuC to obtain
the hardware config since the firmware shall already be running.

With the GuC communication established, VFs can also obtain the
values of the runtime registers (fuses) from the PF driver.

Reviewed-by: Piotr Piórkowski <piotr.piorkowski@intel.com>
Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240516110546.2216-6-michal.wajdeczko@intel.com

diff --git a/drivers/gpu/drm/xe/xe_guc.c b/drivers/gpu/drm/xe/xe_guc.c
index b1bb949..e52b544 100644 (file)
--- a/drivers/gpu/drm/xe/xe_guc.c
+++ b/drivers/gpu/drm/xe/xe_guc.c
@@ -19,6 +19,7 @@
 #include "xe_force_wake.h"
 #include "xe_gt.h"
 #include "xe_gt_printk.h"
+#include "xe_gt_sriov_vf.h"
 #include "xe_guc_ads.h"
 #include "xe_guc_ct.h"
 #include "xe_guc_db_mgr.h"
@@ -547,6 +548,38 @@ out:
        return 0        /* FIXME: ret, don't want to stop load currently */;
 }
 
+static int vf_guc_min_load_for_hwconfig(struct xe_guc *guc)
+{
+       struct xe_gt *gt = guc_to_gt(guc);
+       int ret;
+
+       ret = xe_gt_sriov_vf_bootstrap(gt);
+       if (ret)
+               return ret;
+
+       ret = xe_gt_sriov_vf_query_config(gt);
+       if (ret)
+               return ret;
+
+       ret = xe_guc_hwconfig_init(guc);
+       if (ret)
+               return ret;
+
+       ret = xe_guc_enable_communication(guc);
+       if (ret)
+               return ret;
+
+       ret = xe_gt_sriov_vf_connect(gt);
+       if (ret)
+               return ret;
+
+       ret = xe_gt_sriov_vf_query_runtime(gt);
+       if (ret)
+               return ret;
+
+       return 0;
+}
+
 /**
  * xe_guc_min_load_for_hwconfig - load minimal GuC and read hwconfig table
  * @guc: The GuC object
@@ -562,6 +595,9 @@ int xe_guc_min_load_for_hwconfig(struct xe_guc *guc)
 {
        int ret;
 
+       if (IS_SRIOV_VF(guc_to_xe(guc)))
+               return vf_guc_min_load_for_hwconfig(guc);
+
        xe_guc_ads_populate_minimal(&guc->ads);
 
        /* Raise GT freq to speed up HuC/GuC load */