cxgb4: Convert hwtid_idr to XArray

Signed-off-by: Matthew Wilcox <willy@infradead.org>
Acked-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

drivers/infiniband/hw/cxgb4/cm.c

@@ -331,20 +331,23 @@ static void remove_ep_tid(struct c4iw_ep *ep)
 {
 	unsigned long flags;
 
-	spin_lock_irqsave(&ep->com.dev->lock, flags);
-	_remove_handle(ep->com.dev, &ep->com.dev->hwtid_idr, ep->hwtid, 0);
-	if (idr_is_empty(&ep->com.dev->hwtid_idr))
+	xa_lock_irqsave(&ep->com.dev->hwtids, flags);
+	__xa_erase(&ep->com.dev->hwtids, ep->hwtid);
+	if (xa_empty(&ep->com.dev->hwtids))
 		wake_up(&ep->com.dev->wait);
-	spin_unlock_irqrestore(&ep->com.dev->lock, flags);
+	xa_unlock_irqrestore(&ep->com.dev->hwtids, flags);
 }
 
-static void insert_ep_tid(struct c4iw_ep *ep)
+static int insert_ep_tid(struct c4iw_ep *ep)
 {
 	unsigned long flags;
+	int err;
+
+	xa_lock_irqsave(&ep->com.dev->hwtids, flags);
+	err = __xa_insert(&ep->com.dev->hwtids, ep->hwtid, ep, GFP_KERNEL);
+	xa_unlock_irqrestore(&ep->com.dev->hwtids, flags);
 
-	spin_lock_irqsave(&ep->com.dev->lock, flags);
-	_insert_handle(ep->com.dev, &ep->com.dev->hwtid_idr, ep, ep->hwtid, 0);
-	spin_unlock_irqrestore(&ep->com.dev->lock, flags);
+	return err;
 }
 
 /*
@@ -355,11 +358,11 @@ static struct c4iw_ep *get_ep_from_tid(struct c4iw_dev *dev, unsigned int tid)
 	struct c4iw_ep *ep;
 	unsigned long flags;
 
-	spin_lock_irqsave(&dev->lock, flags);
-	ep = idr_find(&dev->hwtid_idr, tid);
+	xa_lock_irqsave(&dev->hwtids, flags);
+	ep = xa_load(&dev->hwtids, tid);
 	if (ep)
 		c4iw_get_ep(&ep->com);
-	spin_unlock_irqrestore(&dev->lock, flags);
+	xa_unlock_irqrestore(&dev->hwtids, flags);
 	return ep;
 }
 
@@ -2947,7 +2950,7 @@ static int peer_abort(struct c4iw_dev *dev, struct sk_buff *skb)
 					(const u32 *)&sin6->sin6_addr.s6_addr,
 					1);
 		}
-		remove_handle(ep->com.dev, &ep->com.dev->hwtid_idr, ep->hwtid);
+		xa_erase_irq(&ep->com.dev->hwtids, ep->hwtid);
 		cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, ep->hwtid,
 				 ep->com.local_addr.ss_family);
 		dst_release(ep->dst);

drivers/infiniband/hw/cxgb4/device.c

@@ -560,10 +560,8 @@ static const struct file_operations stats_debugfs_fops = {
 	.write   = stats_clear,
 };
 
-static int dump_ep(int id, void *p, void *data)
+static int dump_ep(struct c4iw_ep *ep, struct c4iw_debugfs_data *epd)
 {
-	struct c4iw_ep *ep = p;
-	struct c4iw_debugfs_data *epd = data;
 	int space;
 	int cc;
 
@@ -619,6 +617,11 @@ static int dump_ep(int id, void *p, void *data)
 	return 0;
 }
 
+static int _dump_ep(int id, void *p, void *data)
+{
+	return dump_ep(p, data);
+}
+
 static int dump_listen_ep(int id, void *p, void *data)
 {
 	struct c4iw_listen_ep *ep = p;
@@ -676,6 +679,8 @@ static int ep_release(struct inode *inode, struct file *file)
 
 static int ep_open(struct inode *inode, struct file *file)
 {
+	struct c4iw_ep *ep;
+	unsigned long index;
 	struct c4iw_debugfs_data *epd;
 	int ret = 0;
 	int count = 1;
@@ -688,8 +693,9 @@ static int ep_open(struct inode *inode, struct file *file)
 	epd->devp = inode->i_private;
 	epd->pos = 0;
 
+	xa_for_each(&epd->devp->hwtids, index, ep)
+		count++;
 	spin_lock_irq(&epd->devp->lock);
-	idr_for_each(&epd->devp->hwtid_idr, count_idrs, &count);
 	idr_for_each(&epd->devp->atid_idr, count_idrs, &count);
 	idr_for_each(&epd->devp->stid_idr, count_idrs, &count);
 	spin_unlock_irq(&epd->devp->lock);
@@ -701,9 +707,12 @@ static int ep_open(struct inode *inode, struct file *file)
 		goto err1;
 	}
 
+	xa_lock_irq(&epd->devp->hwtids);
+	xa_for_each(&epd->devp->hwtids, index, ep)
+		dump_ep(ep, epd);
+	xa_unlock_irq(&epd->devp->hwtids);
 	spin_lock_irq(&epd->devp->lock);
-	idr_for_each(&epd->devp->hwtid_idr, dump_ep, epd);
-	idr_for_each(&epd->devp->atid_idr, dump_ep, epd);
+	idr_for_each(&epd->devp->atid_idr, _dump_ep, epd);
 	idr_for_each(&epd->devp->stid_idr, dump_listen_ep, epd);
 	spin_unlock_irq(&epd->devp->lock);
 
@@ -936,8 +945,7 @@ void c4iw_dealloc(struct uld_ctx *ctx)
 	WARN_ON(!xa_empty(&ctx->dev->cqs));
 	WARN_ON(!xa_empty(&ctx->dev->qps));
 	WARN_ON(!xa_empty(&ctx->dev->mrs));
-	wait_event(ctx->dev->wait, idr_is_empty(&ctx->dev->hwtid_idr));
-	idr_destroy(&ctx->dev->hwtid_idr);
+	wait_event(ctx->dev->wait, xa_empty(&ctx->dev->hwtids));
 	idr_destroy(&ctx->dev->stid_idr);
 	idr_destroy(&ctx->dev->atid_idr);
 	if (ctx->dev->rdev.bar2_kva)
@@ -1046,7 +1054,7 @@ static struct c4iw_dev *c4iw_alloc(const struct cxgb4_lld_info *infop)
 	xa_init_flags(&devp->cqs, XA_FLAGS_LOCK_IRQ);
 	xa_init_flags(&devp->qps, XA_FLAGS_LOCK_IRQ);
 	xa_init_flags(&devp->mrs, XA_FLAGS_LOCK_IRQ);
-	idr_init(&devp->hwtid_idr);
+	xa_init_flags(&devp->hwtids, XA_FLAGS_LOCK_IRQ);
 	idr_init(&devp->stid_idr);
 	idr_init(&devp->atid_idr);
 	spin_lock_init(&devp->lock);

drivers/infiniband/hw/cxgb4/iw_cxgb4.h

@@ -322,7 +322,7 @@ struct c4iw_dev {
 	struct mutex db_mutex;
 	struct dentry *debugfs_root;
 	enum db_state db_state;
-	struct idr hwtid_idr;
+	struct xarray hwtids;
 	struct idr atid_idr;
 	struct idr stid_idr;
 	struct list_head db_fc_list;