[PATCH 09/10] drm/xe: Split init of xe_gt_init_hwconfig to xe_gt_init and *_early

[Maarten Lankhorst]

Now that we added the separate step of initialising GUC in
xe_gt_init_early, it should be ok to initialise the minimum during early
init, and the rest after allocations are allowed.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241105121857.17389-9-maarten.lankhorst@linux.intel.com
Signed-off-by: Maarten Lankhorst,,, <dev at lankhorst.se>
---
 drivers/gpu/drm/xe/xe_device.c |  6 ----
 drivers/gpu/drm/xe/xe_gt.c     | 66 +++++++++++++++++-----------------
 drivers/gpu/drm/xe/xe_gt.h     |  1 -
 3 files changed, 32 insertions(+), 41 deletions(-)

diff --git a/drivers/gpu/drm/xe/xe_device.c b/drivers/gpu/drm/xe/xe_device.c
index adfa6f921ddfc..67a34dbc35f52 100644
--- a/drivers/gpu/drm/xe/xe_device.c
+++ b/drivers/gpu/drm/xe/xe_device.c
@@ -663,12 +663,6 @@ int xe_device_probe(struct xe_device *xe)
 			return err;
 	}
 
-	for_each_gt(gt, xe, id) {
-		err = xe_gt_init_hwconfig(gt);
-		if (err)
-			return err;
-	}
-
 	err = xe_devcoredump_init(xe);
 	if (err)
 		return err;
diff --git a/drivers/gpu/drm/xe/xe_gt.c b/drivers/gpu/drm/xe/xe_gt.c
index 9cb0738b62497..dc50557776602 100644
--- a/drivers/gpu/drm/xe/xe_gt.c
+++ b/drivers/gpu/drm/xe/xe_gt.c
@@ -363,6 +363,21 @@ int xe_gt_record_default_lrcs(struct xe_gt *gt)
 	return err;
 }
 
+static int gt_init_mcr(struct xe_gt *gt)
+{
+	unsigned int fw_ref;
+
+	fw_ref = xe_force_wake_get(gt_to_fw(gt), XE_FW_GT);
+	if (!fw_ref)
+		return -ETIMEDOUT;
+
+	xe_gt_mcr_init_early(gt);
+	xe_pat_init(gt);
+
+	xe_force_wake_put(gt_to_fw(gt), fw_ref);
+	return 0;
+}
+
 int xe_gt_init_early(struct xe_gt *gt)
 {
 	int err;
@@ -393,7 +408,11 @@ int xe_gt_init_early(struct xe_gt *gt)
 	 */
 	xe_gt_mmio_init(gt);
 
-	return xe_uc_init_noalloc(&gt->uc);
+	err = xe_uc_init_noalloc(&gt->uc);
+	if (err)
+		return err;
+
+	return gt_init_mcr(gt);
 }
 
 static void dump_pat_on_error(struct xe_gt *gt)
@@ -415,6 +434,18 @@ static int gt_fw_domain_init(struct xe_gt *gt)
 	if (err)
 		goto err_hw_fence_irq;
 
+	err = xe_uc_init(&gt->uc);
+	if (err)
+		goto err_force_wake;
+
+	err = xe_uc_init_hwconfig(&gt->uc);
+	if (err)
+		goto err_force_wake;
+
+	xe_gt_topology_init(gt);
+	xe_gt_mcr_init(gt);
+	xe_gt_enable_host_l2_vram(gt);
+
 	if (!xe_gt_is_media_type(gt)) {
 		err = xe_ggtt_init(gt_to_tile(gt)->mem.ggtt);
 		if (err)
@@ -547,39 +578,6 @@ static int all_fw_domain_init(struct xe_gt *gt)
 	return err;
 }
 
-/*
- * Initialize enough GT to be able to load GuC in order to obtain hwconfig and
- * enable CTB communication.
- */
-int xe_gt_init_hwconfig(struct xe_gt *gt)
-{
-	int err;
-
-	err = xe_force_wake_get(gt_to_fw(gt), XE_FW_GT);
-	if (err)
-		goto out;
-
-	xe_gt_mcr_init_early(gt);
-	xe_pat_init(gt);
-
-	err = xe_uc_init(&gt->uc);
-	if (err)
-		goto out_fw;
-
-	err = xe_uc_init_hwconfig(&gt->uc);
-	if (err)
-		goto out_fw;
-
-	xe_gt_topology_init(gt);
-	xe_gt_mcr_init(gt);
-	xe_gt_enable_host_l2_vram(gt);
-
-out_fw:
-	xe_force_wake_put(gt_to_fw(gt), XE_FW_GT);
-out:
-	return err;
-}
-
 int xe_gt_init(struct xe_gt *gt)
 {
 	int err;
diff --git a/drivers/gpu/drm/xe/xe_gt.h b/drivers/gpu/drm/xe/xe_gt.h
index 82b9b7f82fcab..0c026cc91ffe9 100644
--- a/drivers/gpu/drm/xe/xe_gt.h
+++ b/drivers/gpu/drm/xe/xe_gt.h
@@ -28,7 +28,6 @@ static inline bool xe_fault_inject_gt_reset(void)
 }
 
 struct xe_gt *xe_gt_alloc(struct xe_tile *tile);
-int xe_gt_init_hwconfig(struct xe_gt *gt);
 int xe_gt_init_early(struct xe_gt *gt);
 int xe_gt_init(struct xe_gt *gt);
 void xe_gt_mmio_init(struct xe_gt *gt);
-- 
2.45.2