net/mlx5: Add support for MRTCQ register

Management Real Time Clock Query (MRTCQ) register is used to query
hardware clock identity.

Signed-off-by: Jianbo Liu <[email protected]>
Reviewed-by: Dragos Tatulea <[email protected]>
Signed-off-by: Tariq Toukan <[email protected]>
Link: https://patch.msgid.link/[email protected]
Reviewed-by: Jacob Keller <[email protected]>
Reviewed-by: Kalesh AP <[email protected]>
Signed-off-by: Leon Romanovsky <[email protected]>

Author: Jianbo Liu

include/linux/mlx5/driver.h

@@ -160,6 +160,7 @@ enum {
 	MLX5_REG_MIRC		 = 0x9162,
 	MLX5_REG_MTPTM		 = 0x9180,
 	MLX5_REG_MTCTR		 = 0x9181,
+	MLX5_REG_MRTCQ		 = 0x9182,
 	MLX5_REG_SBCAM		 = 0xB01F,
 	MLX5_REG_RESOURCE_DUMP   = 0xC000,
 	MLX5_REG_DTOR            = 0xC00E,

include/linux/mlx5/mlx5_ifc.h

@@ -10680,7 +10680,8 @@ struct mlx5_ifc_mcam_access_reg_bits3 {
 
 	u8         regs_63_to_32[0x20];
 
-	u8         regs_31_to_2[0x1e];
+	u8         regs_31_to_3[0x1d];
+	u8         mrtcq[0x1];
 	u8         mtctr[0x1];
 	u8         mtptm[0x1];
 };
@@ -13171,4 +13172,12 @@ struct mlx5_ifc_msees_reg_bits {
 	u8         reserved_at_80[0x180];
 };
 
+struct mlx5_ifc_mrtcq_reg_bits {
+	u8         reserved_at_0[0x40];
+
+	u8         rt_clock_identity[0x40];
+
+	u8         reserved_at_80[0x180];
+};
+
 #endif /* MLX5_IFC_H */