net/mlx4_core: Introduce mlx4_get_module_info for cable module info reading

Added new MAD_IFC command to read cable module info with attribute id (0xFF60).
Update include/linux/mlx4/device.h with function declaration (mlx4_get_module_info)
and the needed defines/enums for future use.

Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: Amir Vadai <amirv@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 30 insertions, 0 deletions

diff --git a/include/linux/mlx4/device.h b/include/linux/mlx4/device.h
index 37e4404d0227..73910daec317 100644
--- a/include/linux/mlx4/device.h
+++ b/include/linux/mlx4/device.h
@@ -379,6 +379,13 @@ enum {
 #define MSTR_SM_CHANGE_MASK (MLX4_EQ_PORT_INFO_MSTR_SM_SL_CHANGE_MASK | \
                              MLX4_EQ_PORT_INFO_MSTR_SM_LID_CHANGE_MASK)
 
+enum mlx4_module_id {
+        MLX4_MODULE_ID_SFP              = 0x3,
+        MLX4_MODULE_ID_QSFP             = 0xC,
+        MLX4_MODULE_ID_QSFP_PLUS        = 0xD,
+        MLX4_MODULE_ID_QSFP28           = 0x11,
+};
+
 static inline u64 mlx4_fw_ver(u64 major, u64 minor, u64 subminor)
 {
         return (major << 32) | (minor << 16) | subminor;
@@ -799,6 +806,26 @@ struct mlx4_init_port_param {
         u64                     si_guid;
 };
 
+#define MAD_IFC_DATA_SZ 192
+/* MAD IFC Mailbox */
+struct mlx4_mad_ifc {
+        u8      base_version;
+        u8      mgmt_class;
+        u8      class_version;
+        u8      method;
+        __be16  status;
+        __be16  class_specific;
+        __be64  tid;
+        __be16  attr_id;
+        __be16  resv;
+        __be32  attr_mod;
+        __be64  mkey;
+        __be16  dr_slid;
+        __be16  dr_dlid;
+        u8      reserved[28];
+        u8      data[MAD_IFC_DATA_SZ];
+} __packed;
+
 #define mlx4_foreach_port(port, dev, type)                              \
         for ((port) = 1; (port) <= (dev)->caps.num_ports; (port)++)     \
                 if ((type) == (dev)->caps.port_mask[(port)])
@@ -1283,6 +1310,9 @@ int mlx4_mr_rereg_mem_write(struct mlx4_dev *dev, struct mlx4_mr *mr,
                             u64 iova, u64 size, int npages,
                             int page_shift, struct mlx4_mpt_entry *mpt_entry);
 
+int mlx4_get_module_info(struct mlx4_dev *dev, u8 port,
+                         u16 offset, u16 size, u8 *data);
+
 /* Returns true if running in low memory profile (kdump kernel) */
 static inline bool mlx4_low_memory_profile(void)
 {