qedr: Convert srqidr to XArray

Signed-off-by: Matthew Wilcox <willy@infradead.org>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

drivers/infiniband/hw/qedr/main.c

@@ -39,7 +39,6 @@
 #include <linux/iommu.h>
 #include <linux/pci.h>
 #include <net/addrconf.h>
-#include <linux/idr.h>
 
 #include <linux/qed/qed_chain.h>
 #include <linux/qed/qed_if.h>
@@ -759,8 +758,8 @@ static void qedr_affiliated_event(void *context, u8 e_code, void *fw_handle)
 		break;
 	case EVENT_TYPE_SRQ:
 		srq_id = (u16)roce_handle64;
-		spin_lock_irqsave(&dev->srqidr.idr_lock, flags);
-		srq = idr_find(&dev->srqidr.idr, srq_id);
+		xa_lock_irqsave(&dev->srqs, flags);
+		srq = xa_load(&dev->srqs, srq_id);
 		if (srq) {
 			ibsrq = &srq->ibsrq;
 			if (ibsrq->event_handler) {
@@ -774,7 +773,7 @@ static void qedr_affiliated_event(void *context, u8 e_code, void *fw_handle)
 				  "SRQ event with NULL pointer ibsrq. Handle=%llx\n",
 				  roce_handle64);
 		}
-		spin_unlock_irqrestore(&dev->srqidr.idr_lock, flags);
+		xa_unlock_irqrestore(&dev->srqs, flags);
 		DP_NOTICE(dev, "SRQ event %d on handle %p\n", e_code, srq);
 	default:
 		break;

drivers/infiniband/hw/qedr/qedr.h

@@ -33,7 +33,7 @@
 #define __QEDR_H__
 
 #include <linux/pci.h>
-#include <linux/idr.h>
+#include <linux/xarray.h>
 #include <rdma/ib_addr.h>
 #include <linux/qed/qed_if.h>
 #include <linux/qed/qed_chain.h>
@@ -123,11 +123,6 @@ struct qedr_device_attr {
 
 #define QEDR_ENET_STATE_BIT	(0)
 
-struct qedr_idr {
-	spinlock_t idr_lock; /* Protect idr data-structure */
-	struct idr idr;
-};
-
 struct qedr_dev {
 	struct ib_device	ibdev;
 	struct qed_dev		*cdev;
@@ -172,7 +167,7 @@ struct qedr_dev {
 	struct qedr_qp		*gsi_qp;
 	enum qed_rdma_type	rdma_type;
 	struct xarray		qps;
-	struct qedr_idr		srqidr;
+	struct xarray		srqs;
 	struct workqueue_struct *iwarp_wq;
 	u16			iwarp_max_mtu;
 

drivers/infiniband/hw/qedr/verbs.c

@@ -1380,11 +1380,6 @@ static int qedr_alloc_srq_kernel_params(struct qedr_srq *srq,
 	return rc;
 }
 
-static int qedr_idr_add(struct qedr_dev *dev, struct qedr_idr *qidr,
-			void *ptr, u32 id);
-static void qedr_idr_remove(struct qedr_dev *dev,
-			    struct qedr_idr *qidr, u32 id);
-
 struct ib_srq *qedr_create_srq(struct ib_pd *ibpd,
 			       struct ib_srq_init_attr *init_attr,
 			       struct ib_udata *udata)
@@ -1467,7 +1462,7 @@ struct ib_srq *qedr_create_srq(struct ib_pd *ibpd,
 			goto err2;
 	}
 
-	rc = qedr_idr_add(dev, &dev->srqidr, srq, srq->srq_id);
+	rc = xa_insert_irq(&dev->srqs, srq->srq_id, srq, GFP_KERNEL);
 	if (rc)
 		goto err2;
 
@@ -1496,7 +1491,7 @@ int qedr_destroy_srq(struct ib_srq *ibsrq)
 	struct qedr_dev *dev = get_qedr_dev(ibsrq->device);
 	struct qedr_srq *srq = get_qedr_srq(ibsrq);
 
-	qedr_idr_remove(dev, &dev->srqidr, srq->srq_id);
+	xa_erase_irq(&dev->srqs, srq->srq_id);
 	in_params.srq_id = srq->srq_id;
 	dev->ops->rdma_destroy_srq(dev->rdma_ctx, &in_params);
 
@@ -1596,29 +1591,6 @@ static inline void qedr_qp_user_print(struct qedr_dev *dev, struct qedr_qp *qp)
 		 qp->usq.buf_len, qp->urq.buf_addr, qp->urq.buf_len);
 }
 
-static int qedr_idr_add(struct qedr_dev *dev, struct qedr_idr *qidr,
-			void *ptr, u32 id)
-{
-	int rc;
-
-	idr_preload(GFP_KERNEL);
-	spin_lock_irq(&qidr->idr_lock);
-
-	rc = idr_alloc(&qidr->idr, ptr, id, id + 1, GFP_ATOMIC);
-
-	spin_unlock_irq(&qidr->idr_lock);
-	idr_preload_end();
-
-	return rc < 0 ? rc : 0;
-}
-
-static void qedr_idr_remove(struct qedr_dev *dev, struct qedr_idr *qidr, u32 id)
-{
-	spin_lock_irq(&qidr->idr_lock);
-	idr_remove(&qidr->idr, id);
-	spin_unlock_irq(&qidr->idr_lock);
-}
-
 static inline void
 qedr_iwarp_populate_user_qp(struct qedr_dev *dev,
 			    struct qedr_qp *qp,