IB/mlx5: Keep mlx5 MRs in a radix tree under device

This will be useful when processing signature errors on a specific
key.  The mlx5 driver will lookup the matching mlx5 memory region
structure and mark it as dirty (contains signature errors).

Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>

2 files changed, 25 insertions, 0 deletions

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/main.c b/drivers/net/ethernet/mellanox/mlx5/core/main.c
index a064f06e0cb8..96a0617f7609 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/main.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/main.c
@@ -446,6 +446,7 @@ int mlx5_dev_init(struct mlx5_core_dev *dev, struct pci_dev *pdev)
         mlx5_init_cq_table(dev);
         mlx5_init_qp_table(dev);
         mlx5_init_srq_table(dev);
+        mlx5_init_mr_table(dev);
 
         return 0;
 
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/mr.c b/drivers/net/ethernet/mellanox/mlx5/core/mr.c
index bb746bbe73c6..4cc927649404 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/mr.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/mr.c
@@ -36,11 +36,24 @@
 #include <linux/mlx5/cmd.h>
 #include "mlx5_core.h"
 
+void mlx5_init_mr_table(struct mlx5_core_dev *dev)
+{
+        struct mlx5_mr_table *table = &dev->priv.mr_table;
+
+        rwlock_init(&table->lock);
+        INIT_RADIX_TREE(&table->tree, GFP_ATOMIC);
+}
+
+void mlx5_cleanup_mr_table(struct mlx5_core_dev *dev)
+{
+}
+
 int mlx5_core_create_mkey(struct mlx5_core_dev *dev, struct mlx5_core_mr *mr,
                           struct mlx5_create_mkey_mbox_in *in, int inlen,
                           mlx5_cmd_cbk_t callback, void *context,
                           struct mlx5_create_mkey_mbox_out *out)
 {
+        struct mlx5_mr_table *table = &dev->priv.mr_table;
         struct mlx5_create_mkey_mbox_out lout;
         int err;
         u8 key;
@@ -73,14 +86,21 @@ int mlx5_core_create_mkey(struct mlx5_core_dev *dev, struct mlx5_core_mr *mr,
         mlx5_core_dbg(dev, "out 0x%x, key 0x%x, mkey 0x%x\n",
                       be32_to_cpu(lout.mkey), key, mr->key);
 
+        /* connect to MR tree */
+        write_lock_irq(&table->lock);
+        err = radix_tree_insert(&table->tree, mlx5_base_mkey(mr->key), mr);
+        write_unlock_irq(&table->lock);
+
         return err;
 }
 EXPORT_SYMBOL(mlx5_core_create_mkey);
 
 int mlx5_core_destroy_mkey(struct mlx5_core_dev *dev, struct mlx5_core_mr *mr)
 {
+        struct mlx5_mr_table *table = &dev->priv.mr_table;
         struct mlx5_destroy_mkey_mbox_in in;
         struct mlx5_destroy_mkey_mbox_out out;
+        unsigned long flags;
         int err;
 
         memset(&in, 0, sizeof(in));
@@ -95,6 +115,10 @@ int mlx5_core_destroy_mkey(struct mlx5_core_dev *dev, struct mlx5_core_mr *mr)
         if (out.hdr.status)
                 return mlx5_cmd_status_to_err(&out.hdr);
 
+        write_lock_irqsave(&table->lock, flags);
+        radix_tree_delete(&table->tree, mlx5_base_mkey(mr->key));
+        write_unlock_irqrestore(&table->lock, flags);
+
         return err;
 }
 EXPORT_SYMBOL(mlx5_core_destroy_mkey);