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>

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/main.c b/drivers/net/ethernet/mellanox/mlx5/core/main.c
index a064f06..96a0617 100644 (file)
--- 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 bb746bb..4cc9276 100644 (file)
--- 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);

diff --git a/include/linux/mlx5/driver.h b/include/linux/mlx5/driver.h
index e1cb657..e562e01 100644 (file)
--- a/include/linux/mlx5/driver.h
+++ b/include/linux/mlx5/driver.h
@@ -491,6 +491,13 @@ struct mlx5_srq_table {
        struct radix_tree_root  tree;
 };
 
+struct mlx5_mr_table {
+       /* protect radix tree
+        */
+       rwlock_t                lock;
+       struct radix_tree_root  tree;
+};
+
 struct mlx5_priv {
        char                    name[MLX5_MAX_NAME_LEN];
        struct mlx5_eq_table    eq_table;
@@ -520,6 +527,10 @@ struct mlx5_priv {
        struct mlx5_cq_table    cq_table;
        /* end: cq staff */
 
+       /* start: mr staff */
+       struct mlx5_mr_table    mr_table;
+       /* end: mr staff */
+
        /* start: alloc staff */
        struct mutex            pgdir_mutex;
        struct list_head        pgdir_list;
@@ -667,6 +678,11 @@ static inline void mlx5_vfree(const void *addr)
                kfree(addr);
 }
 
+static inline u32 mlx5_base_mkey(const u32 key)
+{
+       return key & 0xffffff00u;
+}
+
 int mlx5_dev_init(struct mlx5_core_dev *dev, struct pci_dev *pdev);
 void mlx5_dev_cleanup(struct mlx5_core_dev *dev);
 int mlx5_cmd_init(struct mlx5_core_dev *dev);
@@ -701,6 +717,8 @@ int mlx5_core_query_srq(struct mlx5_core_dev *dev, struct mlx5_core_srq *srq,
                        struct mlx5_query_srq_mbox_out *out);
 int mlx5_core_arm_srq(struct mlx5_core_dev *dev, struct mlx5_core_srq *srq,
                      u16 lwm, int is_srq);
+void mlx5_init_mr_table(struct mlx5_core_dev *dev);
+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,