[PATCH v2 4/4] drm/xe/guc: Use GuC ID Manager in submission code

[Michal Wajdeczko]

We are ready to replace private guc_ids management code with
separate GuC ID Manager that can be shared with upcoming SR-IOV
PF provisioning code.

Cc: Matthew Brost <matthew.brost at intel.com>
Signed-off-by: Michal Wajdeczko <michal.wajdeczko at intel.com>
---
 drivers/gpu/drm/xe/xe_guc_submit.c | 42 +++++++-----------------------
 drivers/gpu/drm/xe/xe_guc_types.h  |  4 ---
 2 files changed, 10 insertions(+), 36 deletions(-)

diff --git a/drivers/gpu/drm/xe/xe_guc_submit.c b/drivers/gpu/drm/xe/xe_guc_submit.c
index 9f8ce2d1f6a0..78b471636470 100644
--- a/drivers/gpu/drm/xe/xe_guc_submit.c
+++ b/drivers/gpu/drm/xe/xe_guc_submit.c
@@ -27,6 +27,7 @@
 #include "xe_guc.h"
 #include "xe_guc_ct.h"
 #include "xe_guc_exec_queue_types.h"
+#include "xe_guc_id_mgr.h"
 #include "xe_guc_submit_types.h"
 #include "xe_hw_engine.h"
 #include "xe_hw_fence.h"
@@ -236,16 +237,10 @@ static void guc_submit_fini(struct drm_device *drm, void *arg)
 	struct xe_guc *guc = arg;
 
 	xa_destroy(&guc->submission_state.exec_queue_lookup);
-	ida_destroy(&guc->submission_state.guc_ids);
-	bitmap_free(guc->submission_state.guc_ids_bitmap);
 	free_submit_wq(guc);
 	mutex_destroy(&guc->submission_state.lock);
 }
 
-#define GUC_ID_NUMBER_MLRC	4096
-#define GUC_ID_NUMBER_SLRC	(GUC_ID_MAX - GUC_ID_NUMBER_MLRC)
-#define GUC_ID_START_MLRC	GUC_ID_NUMBER_SLRC
-
 static const struct xe_exec_queue_ops guc_exec_queue_ops;
 
 static void primelockdep(struct xe_guc *guc)
@@ -268,22 +263,14 @@ int xe_guc_submit_init(struct xe_guc *guc)
 	struct xe_gt *gt = guc_to_gt(guc);
 	int err;
 
-	guc->submission_state.guc_ids_bitmap =
-		bitmap_zalloc(GUC_ID_NUMBER_MLRC, GFP_KERNEL);
-	if (!guc->submission_state.guc_ids_bitmap)
-		return -ENOMEM;
-
 	err = alloc_submit_wq(guc);
-	if (err) {
-		bitmap_free(guc->submission_state.guc_ids_bitmap);
+	if (err)
 		return err;
-	}
 
 	gt->exec_queue_ops = &guc_exec_queue_ops;
 
 	mutex_init(&guc->submission_state.lock);
 	xa_init(&guc->submission_state.exec_queue_lookup);
-	ida_init(&guc->submission_state.guc_ids);
 
 	spin_lock_init(&guc->submission_state.suspend.lock);
 	guc->submission_state.suspend.context = dma_fence_context_alloc(1);
@@ -294,6 +281,10 @@ int xe_guc_submit_init(struct xe_guc *guc)
 	if (err)
 		return err;
 
+	err = xe_guc_id_mgr_init(&guc->submission_state.idm, ~0);
+	if (err)
+		return err;
+
 	return 0;
 }
 
@@ -306,12 +297,8 @@ static void __release_guc_id(struct xe_guc *guc, struct xe_exec_queue *q, u32 xa
 	for (i = 0; i < xa_count; ++i)
 		xa_erase(&guc->submission_state.exec_queue_lookup, q->guc->id + i);
 
-	if (xe_exec_queue_is_parallel(q))
-		bitmap_release_region(guc->submission_state.guc_ids_bitmap,
-				      q->guc->id - GUC_ID_START_MLRC,
-				      order_base_2(q->width));
-	else
-		ida_free(&guc->submission_state.guc_ids, q->guc->id);
+	xe_guc_id_mgr_release_locked(&guc->submission_state.idm,
+				     q->guc->id, q->width);
 }
 
 static int alloc_guc_id(struct xe_guc *guc, struct xe_exec_queue *q)
@@ -329,21 +316,12 @@ static int alloc_guc_id(struct xe_guc *guc, struct xe_exec_queue *q)
 	 */
 	lockdep_assert_held(&guc->submission_state.lock);
 
-	if (xe_exec_queue_is_parallel(q)) {
-		void *bitmap = guc->submission_state.guc_ids_bitmap;
-
-		ret = bitmap_find_free_region(bitmap, GUC_ID_NUMBER_MLRC,
-					      order_base_2(q->width));
-	} else {
-		ret = ida_alloc_max(&guc->submission_state.guc_ids,
-				    GUC_ID_NUMBER_SLRC - 1, GFP_NOWAIT);
-	}
+	ret = xe_guc_id_mgr_reserve_locked(&guc->submission_state.idm,
+					   q->width);
 	if (ret < 0)
 		return ret;
 
 	q->guc->id = ret;
-	if (xe_exec_queue_is_parallel(q))
-		q->guc->id += GUC_ID_START_MLRC;
 
 	for (i = 0; i < q->width; ++i) {
 		ptr = xa_store(&guc->submission_state.exec_queue_lookup,
diff --git a/drivers/gpu/drm/xe/xe_guc_types.h b/drivers/gpu/drm/xe/xe_guc_types.h
index 69be1fb83047..82bd93f7867d 100644
--- a/drivers/gpu/drm/xe/xe_guc_types.h
+++ b/drivers/gpu/drm/xe/xe_guc_types.h
@@ -68,10 +68,6 @@ struct xe_guc {
 		struct xe_guc_id_mgr idm;
 		/** @submission_state.exec_queue_lookup: Lookup an xe_engine from guc_id */
 		struct xarray exec_queue_lookup;
-		/** @submission_state.guc_ids: used to allocate new guc_ids, single-lrc */
-		struct ida guc_ids;
-		/** @submission_state.guc_ids_bitmap: used to allocate new guc_ids, multi-lrc */
-		unsigned long *guc_ids_bitmap;
 		/** @submission_state.stopped: submissions are stopped */
 		atomic_t stopped;
 		/** @submission_state.lock: protects submission state */
-- 
2.43.0