RDMA/hns: Use IDA interface to manage srq index

mainline inclusion
from mainline-v5.15-rc1
commit c4f11b36
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I4QOTS
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma.git/commit/?id=c4f11b36f817cf76d58a86b2aadcd8e66eda6047

---------------------------------------------------------------------

Switch srq index allocation and release from hns' own bitmap interface to
IDA interface.

Link: https://lore.kernel.org/r/1629336980-17499-3-git-send-email-liangwenpeng@huawei.comSigned-off-by: NYangyang Li <liyangyang20@huawei.com>
Signed-off-by: NWenpeng Liang <liangwenpeng@huawei.com>
Signed-off-by: NJason Gunthorpe <jgg@nvidia.com>
sigend-off-by: NGuofeng Yue <yueguofeng@hisilicon.com>
Reviewed-by: NYixing Liu <liuyixing1@huawei.com>
Acked-by: NXie XiuQi <xiexiuqi@huawei.com>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>

drivers/infiniband/hw/hns/hns_roce_alloc.c

@@ -256,7 +256,7 @@ void hns_roce_cleanup_bitmap(struct hns_roce_dev *hr_dev)
 		ida_destroy(&hr_dev->xrcd_ida.ida);
 
 	if (hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_SRQ)
-		hns_roce_cleanup_srq_table(hr_dev);
+		ida_destroy(&hr_dev->srq_table.srq_ida.ida);
 	hns_roce_cleanup_qp_table(hr_dev);
 	hns_roce_cleanup_cq_table(hr_dev);
 	ida_destroy(&hr_dev->mr_table.mtpt_ida.ida);

drivers/infiniband/hw/hns/hns_roce_device.h

@@ -494,7 +494,7 @@ struct hns_roce_cq_table {
 };
 
 struct hns_roce_srq_table {
-	struct hns_roce_bitmap		bitmap;
+	struct hns_roce_ida		srq_ida;
 	struct xarray			xa;
 	struct hns_roce_hem_table	table;
 };
@@ -1100,13 +1100,12 @@ void hns_roce_init_pd_table(struct hns_roce_dev *hr_dev);
 void hns_roce_init_mr_table(struct hns_roce_dev *hr_dev);
 void hns_roce_init_cq_table(struct hns_roce_dev *hr_dev);
 void hns_roce_init_qp_table(struct hns_roce_dev *hr_dev);
-int hns_roce_init_srq_table(struct hns_roce_dev *hr_dev);
+void hns_roce_init_srq_table(struct hns_roce_dev *hr_dev);
 void hns_roce_init_xrcd_table(struct hns_roce_dev *hr_dev);
 
 void hns_roce_cleanup_eq_table(struct hns_roce_dev *hr_dev);
 void hns_roce_cleanup_cq_table(struct hns_roce_dev *hr_dev);
 void hns_roce_cleanup_qp_table(struct hns_roce_dev *hr_dev);
-void hns_roce_cleanup_srq_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);

drivers/infiniband/hw/hns/hns_roce_main.c

@@ -867,26 +867,11 @@ static int hns_roce_setup_hca(struct hns_roce_dev *hr_dev)
 	hns_roce_init_qp_table(hr_dev);
 
 	if (hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_SRQ) {
-		ret = hns_roce_init_srq_table(hr_dev);
-		if (ret) {
-			dev_err(dev,
-				"Failed to init share receive queue table.\n");
-			goto err_qp_table_free;
-		}
+		hns_roce_init_srq_table(hr_dev);
 	}
 
 	return 0;
 
-err_qp_table_free:
-	hns_roce_cleanup_qp_table(hr_dev);
-	hns_roce_cleanup_cq_table(hr_dev);
-	ida_destroy(&hr_dev->mr_table.mtpt_ida.ida);
-
-	if (hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_XRC)
-		ida_destroy(&hr_dev->xrcd_ida.ida);
-
-	ida_destroy(&hr_dev->pd_ida.ida);
-
 err_uar_table_free:
 	ida_destroy(&hr_dev->uar_ida.ida);
 	return ret;

drivers/infiniband/hw/hns/hns_roce_srq.c

@@ -80,15 +80,19 @@ static int hns_roce_hw_destroy_srq(struct hns_roce_dev *dev,
 static int alloc_srqc(struct hns_roce_dev *hr_dev, struct hns_roce_srq *srq)
 {
 	struct hns_roce_srq_table *srq_table = &hr_dev->srq_table;
+	struct hns_roce_ida *srq_ida = &hr_dev->srq_table.srq_ida;
 	struct ib_device *ibdev = &hr_dev->ib_dev;
 	struct hns_roce_cmd_mailbox *mailbox;
 	int ret;
+	int id;
 
-	ret = hns_roce_bitmap_alloc(&srq_table->bitmap, &srq->srqn);
-	if (ret) {
-		ibdev_err(ibdev, "failed to alloc SRQ number.\n");
+	id = ida_alloc_range(&srq_ida->ida, srq_ida->min, srq_ida->max,
+			     GFP_KERNEL);
+	if (id < 0) {
+		ibdev_err(ibdev, "failed to alloc srq(%d).\n", id);
 		return -ENOMEM;
 	}
+	srq->srqn = (unsigned long)id;
 
 	ret = hns_roce_table_get(hr_dev, &srq_table->table, srq->srqn);
 	if (ret) {
@@ -132,7 +136,7 @@ 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);
+	ida_free(&srq_ida->ida, id);
 
 	return ret;
 }
@@ -154,7 +158,7 @@ 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);
+	ida_free(&srq_table->srq_ida.ida, (int)srq->srqn);
 }
 
 static int alloc_srq_idx(struct hns_roce_dev *hr_dev, struct hns_roce_srq *srq,
@@ -440,18 +444,14 @@ int hns_roce_destroy_srq(struct ib_srq *ibsrq, struct ib_udata *udata)
 	return 0;
 }
 
-int hns_roce_init_srq_table(struct hns_roce_dev *hr_dev)
+void hns_roce_init_srq_table(struct hns_roce_dev *hr_dev)
 {
 	struct hns_roce_srq_table *srq_table = &hr_dev->srq_table;
+	struct hns_roce_ida *srq_ida = &srq_table->srq_ida;
 
 	xa_init(&srq_table->xa);
 
-	return hns_roce_bitmap_init(&srq_table->bitmap, hr_dev->caps.num_srqs,
-				    hr_dev->caps.num_srqs - 1,
-				    hr_dev->caps.reserved_srqs, 0);
-}
-
-void hns_roce_cleanup_srq_table(struct hns_roce_dev *hr_dev)
-{
-	hns_roce_bitmap_cleanup(&hr_dev->srq_table.bitmap);
+	ida_init(&srq_ida->ida);
+	srq_ida->max = hr_dev->caps.num_srqs - 1;
+	srq_ida->min = hr_dev->caps.reserved_srqs;
 }