drm/xe/vf: Custom uC initialization

VF drivers can't modify WOPCM registers nor upload firmwares to
GuC, HuC or GSC.  Modify xe_uc initialization functions to skip
those steps if running in the VF mode, or defer to a new custom
helper function that would not include those steps.

Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Reviewed-by: Piotr Piórkowski <piotr.piorkowski@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240604212231.1416-3-michal.wajdeczko@intel.com

diff --git a/drivers/gpu/drm/xe/xe_uc.c b/drivers/gpu/drm/xe/xe_uc.c
index 85808706d1c85dbf933502bfdf73d7586988c0fc..0f240534fb725d1f7441cfbfcab701295eae7ad6 100644 (file)
--- a/drivers/gpu/drm/xe/xe_uc.c
+++ b/drivers/gpu/drm/xe/xe_uc.c
@@ -11,9 +11,11 @@
 #include "xe_gsc_proxy.h"
 #include "xe_gt.h"
 #include "xe_gt_printk.h"
+#include "xe_gt_sriov_vf.h"
 #include "xe_guc.h"
 #include "xe_guc_pc.h"
 #include "xe_huc.h"
+#include "xe_sriov.h"
 #include "xe_uc_fw.h"
 #include "xe_wopcm.h"
 
@@ -53,6 +55,9 @@ int xe_uc_init(struct xe_uc *uc)
        if (!xe_device_uc_enabled(uc_to_xe(uc)))
                return 0;
 
+       if (IS_SRIOV_VF(uc_to_xe(uc)))
+               return 0;
+
        ret = xe_wopcm_init(&uc->wopcm);
        if (ret)
                goto err;
@@ -141,6 +146,31 @@ int xe_uc_init_hwconfig(struct xe_uc *uc)
        return 0;
 }
 
+static int vf_uc_init_hw(struct xe_uc *uc)
+{
+       int err;
+
+       err = xe_uc_sanitize_reset(uc);
+       if (err)
+               return err;
+
+       err = xe_guc_enable_communication(&uc->guc);
+       if (err)
+               return err;
+
+       err = xe_gt_sriov_vf_connect(uc_to_gt(uc));
+       if (err)
+               return err;
+
+       uc->guc.submission_state.enabled = true;
+
+       err = xe_gt_record_default_lrcs(uc_to_gt(uc));
+       if (err)
+               return err;
+
+       return 0;
+}
+
 /*
  * Should be called during driver load, after every GT reset, and after every
  * suspend to reload / auth the firmwares.
@@ -153,6 +183,9 @@ int xe_uc_init_hw(struct xe_uc *uc)
        if (!xe_device_uc_enabled(uc_to_xe(uc)))
                return 0;
 
+       if (IS_SRIOV_VF(uc_to_xe(uc)))
+               return vf_uc_init_hw(uc);
+
        ret = xe_huc_upload(&uc->huc);
        if (ret)
                return ret;