RDMA/hns: Use IDA interface to manage pd index

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

Link: https://lore.kernel.org/r/1623325814-55737-6-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

@@ -252,6 +252,6 @@ void hns_roce_cleanup_bitmap(struct hns_roce_dev *hr_dev)
 	hns_roce_cleanup_qp_table(hr_dev);
 	hns_roce_cleanup_cq_table(hr_dev);
 	ida_destroy(&hr_dev->mr_table.mtpt_ida.ida);
-	hns_roce_cleanup_pd_table(hr_dev);
+	ida_destroy(&hr_dev->pd_ida.ida);
 	hns_roce_cleanup_uar_table(hr_dev);
 }

drivers/infiniband/hw/hns/hns_roce_device.h

@@ -961,7 +961,7 @@ struct hns_roce_dev {
 	void __iomem            *priv_addr;
 
 	struct hns_roce_cmdq	cmd;
-	struct hns_roce_bitmap    pd_bitmap;
+	struct hns_roce_ida pd_ida;
 	struct hns_roce_bitmap xrcd_bitmap;
 	struct hns_roce_uar_table uar_table;
 	struct hns_roce_mr_table  mr_table;
@@ -1143,14 +1143,13 @@ void hns_roce_mtr_destroy(struct hns_roce_dev *hr_dev,
 int hns_roce_mtr_map(struct hns_roce_dev *hr_dev, struct hns_roce_mtr *mtr,
 		     dma_addr_t *pages, unsigned int page_cnt);
 
-int hns_roce_init_pd_table(struct hns_roce_dev *hr_dev);
+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);
 int hns_roce_init_qp_table(struct hns_roce_dev *hr_dev);
 int hns_roce_init_srq_table(struct hns_roce_dev *hr_dev);
 int hns_roce_init_xrcd_table(struct hns_roce_dev *hr_dev);
 
-void hns_roce_cleanup_pd_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);

drivers/infiniband/hw/hns/hns_roce_main.c

@@ -748,11 +748,7 @@ static int hns_roce_setup_hca(struct hns_roce_dev *hr_dev)
 		goto err_uar_table_free;
 	}
 
-	ret = hns_roce_init_pd_table(hr_dev);
-	if (ret) {
-		dev_err(dev, "Failed to init protected domain table.\n");
-		goto err_uar_alloc_free;
-	}
+	hns_roce_init_pd_table(hr_dev);
 
 	if (hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_XRC) {
 		ret = hns_roce_init_xrcd_table(hr_dev);
@@ -795,9 +791,7 @@ static int hns_roce_setup_hca(struct hns_roce_dev *hr_dev)
 		hns_roce_cleanup_xrcd_table(hr_dev);
 
 err_pd_table_free:
-	hns_roce_cleanup_pd_table(hr_dev);
-
-err_uar_alloc_free:
+	ida_destroy(&hr_dev->pd_ida.ida);
 	hns_roce_uar_free(hr_dev, &hr_dev->priv_uar);
 
 err_uar_table_free:

drivers/infiniband/hw/hns/hns_roce_pd.c

@@ -34,39 +34,31 @@
 #include <linux/pci.h>
 #include "hns_roce_device.h"
 
-static int hns_roce_pd_alloc(struct hns_roce_dev *hr_dev, unsigned long *pdn)
+void hns_roce_init_pd_table(struct hns_roce_dev *hr_dev)
 {
-	return hns_roce_bitmap_alloc(&hr_dev->pd_bitmap, pdn) ? -ENOMEM : 0;
-}
-
-static void hns_roce_pd_free(struct hns_roce_dev *hr_dev, unsigned long pdn)
-{
-	hns_roce_bitmap_free(&hr_dev->pd_bitmap, pdn);
-}
-
-int hns_roce_init_pd_table(struct hns_roce_dev *hr_dev)
-{
-	return hns_roce_bitmap_init(&hr_dev->pd_bitmap, hr_dev->caps.num_pds,
-				    hr_dev->caps.num_pds - 1,
-				    hr_dev->caps.reserved_pds, 0);
-}
+	struct hns_roce_ida *pd_ida = &hr_dev->pd_ida;
 
-void hns_roce_cleanup_pd_table(struct hns_roce_dev *hr_dev)
-{
-	hns_roce_bitmap_cleanup(&hr_dev->pd_bitmap);
+	ida_init(&pd_ida->ida);
+	pd_ida->max = hr_dev->caps.num_pds - 1;
+	pd_ida->min = hr_dev->caps.reserved_pds;
 }
 
 int hns_roce_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)
 {
 	struct ib_device *ib_dev = ibpd->device;
+	struct hns_roce_dev *hr_dev = to_hr_dev(ib_dev);
+	struct hns_roce_ida *pd_ida = &hr_dev->pd_ida;
 	struct hns_roce_pd *pd = to_hr_pd(ibpd);
-	int ret;
+	int ret = 0;
+	int id;
 
-	ret = hns_roce_pd_alloc(to_hr_dev(ib_dev), &pd->pdn);
-	if (ret) {
-		ibdev_err(ib_dev, "failed to alloc pd, ret = %d.\n", ret);
-		return ret;
+	id = ida_alloc_range(&pd_ida->ida, pd_ida->min, pd_ida->max,
+			     GFP_KERNEL);
+	if (id < 0) {
+		ibdev_err(ib_dev, "failed to alloc pd, id = %d.\n", id);
+		return -ENOMEM;
 	}
+	pd->pdn = (unsigned long)id;
 
 	if (udata) {
 		struct hns_roce_ib_alloc_pd_resp resp = {.pdn = pd->pdn};
@@ -74,7 +66,7 @@ int hns_roce_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)
 		ret = ib_copy_to_udata(udata, &resp,
 				       min(udata->outlen, sizeof(resp)));
 		if (ret) {
-			hns_roce_pd_free(to_hr_dev(ib_dev), pd->pdn);
+			ida_free(&pd_ida->ida, id);
 			ibdev_err(ib_dev, "failed to copy to udata, ret = %d\n", ret);
 		}
 	}
@@ -84,7 +76,10 @@ int hns_roce_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)
 
 int hns_roce_dealloc_pd(struct ib_pd *pd, struct ib_udata *udata)
 {
-	hns_roce_pd_free(to_hr_dev(pd->device), to_hr_pd(pd)->pdn);
+	struct hns_roce_dev *hr_dev = to_hr_dev(pd->device);
+
+	ida_free(&hr_dev->pd_ida.ida, (int)to_hr_pd(pd)->pdn);
+
 	return 0;
 }