RDMA/hns: Remove unused RR mechanism

Round-robin (RR) is no longer used in the allocation of the bitmap table,
and all the function input parameters that use this mechanism are
BITMAP_NO_RR. The code that defines and uses the RR needs to be deleted.

Link: https://lore.kernel.org/r/1623325814-55737-4-git-send-email-liweihang@huawei.comSigned-off-by: NYangyang Li <liyangyang20@huawei.com>
Signed-off-by: NWeihang Li <liweihang@huawei.com>
Signed-off-by: NJason Gunthorpe <jgg@nvidia.com>

drivers/infiniband/hw/hns/hns_roce_alloc.c

@@ -63,16 +63,14 @@ int hns_roce_bitmap_alloc(struct hns_roce_bitmap *bitmap, unsigned long *obj)
 	return ret;
 }
 
-void hns_roce_bitmap_free(struct hns_roce_bitmap *bitmap, unsigned long obj,
-			  int rr)
+void hns_roce_bitmap_free(struct hns_roce_bitmap *bitmap, unsigned long obj)
 {
 	obj &= bitmap->max + bitmap->reserved_top - 1;
 
 	spin_lock(&bitmap->lock);
 	clear_bit(obj, bitmap->table);
 
-	if (!rr)
-		bitmap->last = min(bitmap->last, obj);
+	bitmap->last = min(bitmap->last, obj);
 	bitmap->top = (bitmap->top + bitmap->max + bitmap->reserved_top)
 		       & bitmap->mask;
 	spin_unlock(&bitmap->lock);

drivers/infiniband/hw/hns/hns_roce_device.h

@@ -95,9 +95,6 @@
 
 #define HNS_ROCE_HOP_NUM_0			0xff
 
-#define BITMAP_NO_RR				0
-#define BITMAP_RR				1
-
 #define MR_TYPE_MR				0x00
 #define MR_TYPE_FRMR				0x01
 #define MR_TYPE_DMA				0x03
@@ -1156,8 +1153,7 @@ void hns_roce_cleanup_srq_table(struct hns_roce_dev *hr_dev);
 void hns_roce_cleanup_xrcd_table(struct hns_roce_dev *hr_dev);
 
 int hns_roce_bitmap_alloc(struct hns_roce_bitmap *bitmap, unsigned long *obj);
-void hns_roce_bitmap_free(struct hns_roce_bitmap *bitmap, unsigned long obj,
-			 int rr);
+void hns_roce_bitmap_free(struct hns_roce_bitmap *bitmap, unsigned long obj);
 int hns_roce_bitmap_init(struct hns_roce_bitmap *bitmap, u32 num, u32 mask,
 			 u32 reserved_bot, u32 resetrved_top);
 void hns_roce_bitmap_cleanup(struct hns_roce_bitmap *bitmap);

drivers/infiniband/hw/hns/hns_roce_hw_v1.c

@@ -1199,7 +1199,7 @@ static int hns_roce_v1_dereg_mr(struct hns_roce_dev *hr_dev,
 		mr->key, jiffies_to_usecs(jiffies) - jiffies_to_usecs(start));
 
 	hns_roce_bitmap_free(&hr_dev->mr_table.mtpt_bitmap,
-			     key_to_hw_index(mr->key), 0);
+			     key_to_hw_index(mr->key));
 	hns_roce_mtr_destroy(hr_dev, &mr->pbl_mtr);
 	kfree(mr);
 

drivers/infiniband/hw/hns/hns_roce_mr.c

@@ -91,7 +91,7 @@ static int alloc_mr_key(struct hns_roce_dev *hr_dev, struct hns_roce_mr *mr)
 
 	return 0;
 err_free_bitmap:
-	hns_roce_bitmap_free(&hr_dev->mr_table.mtpt_bitmap, obj, BITMAP_NO_RR);
+	hns_roce_bitmap_free(&hr_dev->mr_table.mtpt_bitmap, obj);
 	return err;
 }
 
@@ -100,7 +100,7 @@ static void free_mr_key(struct hns_roce_dev *hr_dev, struct hns_roce_mr *mr)
 	unsigned long obj = key_to_hw_index(mr->key);
 
 	hns_roce_table_put(hr_dev, &hr_dev->mr_table.mtpt_table, obj);
-	hns_roce_bitmap_free(&hr_dev->mr_table.mtpt_bitmap, obj, BITMAP_NO_RR);
+	hns_roce_bitmap_free(&hr_dev->mr_table.mtpt_bitmap, obj);
 }
 
 static int alloc_mr_pbl(struct hns_roce_dev *hr_dev, struct hns_roce_mr *mr,
@@ -504,7 +504,7 @@ static void hns_roce_mw_free(struct hns_roce_dev *hr_dev,
 	}
 
 	hns_roce_bitmap_free(&hr_dev->mr_table.mtpt_bitmap,
-			     key_to_hw_index(mw->rkey), BITMAP_NO_RR);
+			     key_to_hw_index(mw->rkey));
 }
 
 static int hns_roce_mw_enable(struct hns_roce_dev *hr_dev,

drivers/infiniband/hw/hns/hns_roce_pd.c

@@ -41,7 +41,7 @@ static int hns_roce_pd_alloc(struct hns_roce_dev *hr_dev, unsigned long *pdn)
 
 static void hns_roce_pd_free(struct hns_roce_dev *hr_dev, unsigned long pdn)
 {
-	hns_roce_bitmap_free(&hr_dev->pd_bitmap, pdn, BITMAP_NO_RR);
+	hns_roce_bitmap_free(&hr_dev->pd_bitmap, pdn);
 }
 
 int hns_roce_init_pd_table(struct hns_roce_dev *hr_dev)
@@ -121,8 +121,7 @@ int hns_roce_uar_alloc(struct hns_roce_dev *hr_dev, struct hns_roce_uar *uar)
 
 void hns_roce_uar_free(struct hns_roce_dev *hr_dev, struct hns_roce_uar *uar)
 {
-	hns_roce_bitmap_free(&hr_dev->uar_table.bitmap, uar->logic_idx,
-			     BITMAP_NO_RR);
+	hns_roce_bitmap_free(&hr_dev->uar_table.bitmap, uar->logic_idx);
 }
 
 int hns_roce_init_uar_table(struct hns_roce_dev *hr_dev)
@@ -155,7 +154,7 @@ static int hns_roce_xrcd_alloc(struct hns_roce_dev *hr_dev, u32 *xrcdn)
 static void hns_roce_xrcd_free(struct hns_roce_dev *hr_dev,
 			       u32 xrcdn)
 {
-	hns_roce_bitmap_free(&hr_dev->xrcd_bitmap, xrcdn, BITMAP_NO_RR);
+	hns_roce_bitmap_free(&hr_dev->xrcd_bitmap, xrcdn);
 }
 
 int hns_roce_init_xrcd_table(struct hns_roce_dev *hr_dev)

drivers/infiniband/hw/hns/hns_roce_srq.c

@@ -132,7 +132,7 @@ static int alloc_srqc(struct hns_roce_dev *hr_dev, struct hns_roce_srq *srq)
 err_put:
 	hns_roce_table_put(hr_dev, &srq_table->table, srq->srqn);
 err_out:
-	hns_roce_bitmap_free(&srq_table->bitmap, srq->srqn, BITMAP_NO_RR);
+	hns_roce_bitmap_free(&srq_table->bitmap, srq->srqn);
 
 	return ret;
 }
@@ -154,7 +154,7 @@ static void free_srqc(struct hns_roce_dev *hr_dev, struct hns_roce_srq *srq)
 	wait_for_completion(&srq->free);
 
 	hns_roce_table_put(hr_dev, &srq_table->table, srq->srqn);
-	hns_roce_bitmap_free(&srq_table->bitmap, srq->srqn, BITMAP_NO_RR);
+	hns_roce_bitmap_free(&srq_table->bitmap, srq->srqn);
 }
 
 static int alloc_srq_idx(struct hns_roce_dev *hr_dev, struct hns_roce_srq *srq,