[PATCH 2/4] drm/xe/vf: Custom uC initialization

[Michal Wajdeczko]

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.

Signed-off-by: Michal Wajdeczko <michal.wajdeczko at intel.com>
---
 drivers/gpu/drm/xe/xe_uc.c | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/drivers/gpu/drm/xe/xe_uc.c b/drivers/gpu/drm/xe/xe_uc.c
index 85808706d1c8..0f240534fb72 100644
--- 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;
-- 
2.43.0