RDMA/mlx5: Delete struct mlx5_priv->mkey_table

No users are left, delete it.

Link: https://lore.kernel.org/r/20191009160934.3143-5-jgg@ziepe.caReviewed-by: Artemy Kovalyov <artemyko@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

drivers/infiniband/hw/mlx5/mr.c

@@ -90,8 +90,6 @@ static void reg_mr_callback(int status, struct mlx5_async_work *context)
 	struct mlx5_cache_ent *ent = &cache->ent[c];
 	u8 key;
 	unsigned long flags;
-	struct xarray *mkeys = &dev->mdev->priv.mkey_table;
-	int err;
 
 	spin_lock_irqsave(&ent->lock, flags);
 	ent->pending--;
@@ -118,13 +116,6 @@ static void reg_mr_callback(int status, struct mlx5_async_work *context)
 	ent->size++;
 	spin_unlock_irqrestore(&ent->lock, flags);
 
-	xa_lock_irqsave(mkeys, flags);
-	err = xa_err(__xa_store(mkeys, mlx5_base_mkey(mr->mmkey.key),
-				&mr->mmkey, GFP_ATOMIC));
-	xa_unlock_irqrestore(mkeys, flags);
-	if (err)
-		pr_err("Error inserting to mkey tree. 0x%x\n", -err);
-
 	if (!completion_done(&ent->compl))
 		complete(&ent->compl);
 }

drivers/net/ethernet/mellanox/mlx5/core/main.c

@@ -837,8 +837,6 @@ static int mlx5_init_once(struct mlx5_core_dev *dev)
 
 	mlx5_init_qp_table(dev);
 
-	mlx5_init_mkey_table(dev);
-
 	mlx5_init_reserved_gids(dev);
 
 	mlx5_init_clock(dev);
@@ -896,7 +894,6 @@ static int mlx5_init_once(struct mlx5_core_dev *dev)
 err_tables_cleanup:
 	mlx5_geneve_destroy(dev->geneve);
 	mlx5_vxlan_destroy(dev->vxlan);
-	mlx5_cleanup_mkey_table(dev);
 	mlx5_cleanup_qp_table(dev);
 	mlx5_cq_debugfs_cleanup(dev);
 	mlx5_events_cleanup(dev);
@@ -924,7 +921,6 @@ static void mlx5_cleanup_once(struct mlx5_core_dev *dev)
 	mlx5_vxlan_destroy(dev->vxlan);
 	mlx5_cleanup_clock(dev);
 	mlx5_cleanup_reserved_gids(dev);
-	mlx5_cleanup_mkey_table(dev);
 	mlx5_cleanup_qp_table(dev);
 	mlx5_cq_debugfs_cleanup(dev);
 	mlx5_events_cleanup(dev);

drivers/net/ethernet/mellanox/mlx5/core/mr.c

@@ -36,16 +36,6 @@
 #include <linux/mlx5/cmd.h>
 #include "mlx5_core.h"
 
-void mlx5_init_mkey_table(struct mlx5_core_dev *dev)
-{
-	xa_init_flags(&dev->priv.mkey_table, XA_FLAGS_LOCK_IRQ);
-}
-
-void mlx5_cleanup_mkey_table(struct mlx5_core_dev *dev)
-{
-	WARN_ON(!xa_empty(&dev->priv.mkey_table));
-}
-
 int mlx5_core_create_mkey_cb(struct mlx5_core_dev *dev,
 			     struct mlx5_core_mkey *mkey,
 			     struct mlx5_async_ctx *async_ctx, u32 *in,
@@ -54,7 +44,6 @@ int mlx5_core_create_mkey_cb(struct mlx5_core_dev *dev,
 			     struct mlx5_async_work *context)
 {
 	u32 lout[MLX5_ST_SZ_DW(create_mkey_out)] = {0};
-	struct xarray *mkeys = &dev->priv.mkey_table;
 	u32 mkey_index;
 	void *mkc;
 	int err;
@@ -84,16 +73,7 @@ int mlx5_core_create_mkey_cb(struct mlx5_core_dev *dev,
 
 	mlx5_core_dbg(dev, "out 0x%x, key 0x%x, mkey 0x%x\n",
 		      mkey_index, key, mkey->key);
-
-	err = xa_err(xa_store_irq(mkeys, mlx5_base_mkey(mkey->key), mkey,
-				  GFP_KERNEL));
-	if (err) {
-		mlx5_core_warn(dev, "failed xarray insert of mkey 0x%x, %d\n",
-			       mlx5_base_mkey(mkey->key), err);
-		mlx5_core_destroy_mkey(dev, mkey);
-	}
-
-	return err;
+	return 0;
 }
 EXPORT_SYMBOL(mlx5_core_create_mkey_cb);
 
@@ -111,12 +91,6 @@ int mlx5_core_destroy_mkey(struct mlx5_core_dev *dev,
 {
 	u32 out[MLX5_ST_SZ_DW(destroy_mkey_out)] = {0};
 	u32 in[MLX5_ST_SZ_DW(destroy_mkey_in)]   = {0};
-	struct xarray *mkeys = &dev->priv.mkey_table;
-	unsigned long flags;
-
-	xa_lock_irqsave(mkeys, flags);
-	__xa_erase(mkeys, mlx5_base_mkey(mkey->key));
-	xa_unlock_irqrestore(mkeys, flags);
 
 	MLX5_SET(destroy_mkey_in, in, opcode, MLX5_CMD_OP_DESTROY_MKEY);
 	MLX5_SET(destroy_mkey_in, in, mkey_index, mlx5_mkey_to_idx(mkey->key));

include/linux/mlx5/driver.h

@@ -556,8 +556,6 @@ struct mlx5_priv {
 	struct dentry	       *cmdif_debugfs;
 	/* end: qp staff */
 
-	struct xarray           mkey_table;
-
 	/* start: alloc staff */
 	/* protect buffer alocation according to numa node */
 	struct mutex            alloc_mutex;
@@ -942,8 +940,6 @@ struct mlx5_cmd_mailbox *mlx5_alloc_cmd_mailbox_chain(struct mlx5_core_dev *dev,
 						      gfp_t flags, int npages);
 void mlx5_free_cmd_mailbox_chain(struct mlx5_core_dev *dev,
 				 struct mlx5_cmd_mailbox *head);
-void mlx5_init_mkey_table(struct mlx5_core_dev *dev);
-void mlx5_cleanup_mkey_table(struct mlx5_core_dev *dev);
 int mlx5_core_create_mkey_cb(struct mlx5_core_dev *dev,
 			     struct mlx5_core_mkey *mkey,
 			     struct mlx5_async_ctx *async_ctx, u32 *in,