net/mlx4_core: Maintain a persistent memory for mlx4 device

Maintain a persistent memory that should survive reset flow/PCI error.
This comes as a preparation for coming series to support above flows.

Signed-off-by: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 8 insertions, 3 deletions

diff --git a/include/linux/mlx4/device.h b/include/linux/mlx4/device.h
index f1e41b33462f..1069ce65e8b4 100644
--- a/include/linux/mlx4/device.h
+++ b/include/linux/mlx4/device.h
@@ -744,8 +744,15 @@ struct mlx4_vf_dev {
         u8                      n_ports;
 };
 
-struct mlx4_dev {
+struct mlx4_dev_persistent {
         struct pci_dev         *pdev;
+        struct mlx4_dev        *dev;
+        int                     nvfs[MLX4_MAX_PORTS + 1];
+        int                     num_vfs;
+};
+
+struct mlx4_dev {
+        struct mlx4_dev_persistent *persist;
         unsigned long           flags;
         unsigned long           num_slaves;
         struct mlx4_caps        caps;
@@ -754,13 +761,11 @@ struct mlx4_dev {
         struct radix_tree_root  qp_table_tree;
         u8                      rev_id;
         char                    board_id[MLX4_BOARD_ID_LEN];
-        int                     num_vfs;
         int                     numa_node;
         int                     oper_log_mgm_entry_size;
         u64                     regid_promisc_array[MLX4_MAX_PORTS + 1];
         u64                     regid_allmulti_array[MLX4_MAX_PORTS + 1];
         struct mlx4_vf_dev     *dev_vfs;
-        int                     nvfs[MLX4_MAX_PORTS + 1];
 };
 
 struct mlx4_eqe {