.. _rb_if_ctrl: ================================ Interface control register block ================================ The interface control register block has a header with type 0x0000C001, version 0x00000300, and contains several interface-level control registers. .. table:: ======== ============= ====== ====== ====== ====== ============= Address Field 31..24 23..16 15..8 7..0 Reset value ======== ============= ====== ====== ====== ====== ============= RBB+0x00 Type Vendor ID Type RO 0x0000C001 -------- ------------- -------------- -------------- ------------- RBB+0x04 Version Major Minor Patch Meta RO 0x00000300 -------- ------------- ------ ------ ------ ------ ------------- RBB+0x08 Next pointer Pointer to next register block RO - -------- ------------- ------------------------------ ------------- RBB+0x0C Features Interface feature bits RO - -------- ------------- ------------------------------ ------------- RBB+0x10 Port count Port count RO - -------- ------------- ------------------------------ ------------- RBB+0x14 Sched count Scheduler block count RO - -------- ------------- ------------------------------ ------------- RBB+0x18 - - RO - -------- ------------- ------------------------------ ------------- RBB+0x1C - - RO - -------- ------------- ------------------------------ ------------- RBB+0x20 Max TX MTU Max TX MTU RO - -------- ------------- ------------------------------ ------------- RBB+0x24 Max RX MTU Max RX MTU RO - -------- ------------- ------------------------------ ------------- RBB+0x28 TX MTU TX MTU RW - -------- ------------- ------------------------------ ------------- RBB+0x2C RX MTU RX MTU RW - -------- ------------- ------------------------------ ------------- RBB+0x30 RSS mask RSS mask RW 0x00000000 ======== ============= ============================== ============= See :ref:`rb_overview` for definitions of the standard register block header fields. .. object:: Features The features field contains all of the interface-level feature bits, indicating the state of various optional features that can be enabled via Verilog parameters during synthesis. .. table:: ======== ====== ====== ====== ====== ============= Address 31..24 23..16 15..8 7..0 Reset value ======== ====== ====== ====== ====== ============= RBB+0x0C Interface feature bits RO - ======== ============================== ============= Currently implemented feature bits: .. table:: === ======================= Bit Feature === ======================= 0 RSS 4 PTP timestamping 8 TX checksum offloading 9 RX checksum offloading 10 RX flow hash offloading === ======================= .. object:: Port count The port count field contains the number of ports associated with the interface, as configured via Verilog parameters during synthesis. .. table:: ======== ====== ====== ====== ====== ============= Address 31..24 23..16 15..8 7..0 Reset value ======== ====== ====== ====== ====== ============= RBB+0x10 Port count RO - ======== ============================== ============= .. object:: Scheduler block count The scheduler block count field contains the number of scheduler blocks associated with the interface, as configured via Verilog parameters during synthesis. .. table:: ======== ====== ====== ====== ====== ============= Address 31..24 23..16 15..8 7..0 Reset value ======== ====== ====== ====== ====== ============= RBB+0x14 Scheduler block count RO - ======== ============================== ============= .. object:: Max TX MTU The max TX MTU field contains the maximum frame size on the transmit path, as configured via Verilog parameters during synthesis. .. table:: ======== ====== ====== ====== ====== ============= Address 31..24 23..16 15..8 7..0 Reset value ======== ====== ====== ====== ====== ============= RBB+0x20 Max TX MTU RO - ======== ============================== ============= .. object:: Max RX MTU The max RX MTU field contains the maximum frame size on the receive path, as configured via Verilog parameters during synthesis. .. table:: ======== ====== ====== ====== ====== ============= Address 31..24 23..16 15..8 7..0 Reset value ======== ====== ====== ====== ====== ============= RBB+0x24 Max RX MTU RO - ======== ============================== ============= .. object:: TX MTU The TX MTU field controls the maximum frame size on the transmit path. .. table:: ======== ====== ====== ====== ====== ============= Address 31..24 23..16 15..8 7..0 Reset value ======== ====== ====== ====== ====== ============= RBB+0x28 TX MTU RW - ======== ============================== ============= .. object:: RX MTU The RX MTU field controls the maximum frame size on the receive path. .. table:: ======== ====== ====== ====== ====== ============= Address 31..24 23..16 15..8 7..0 Reset value ======== ====== ====== ====== ====== ============= RBB+0x2C RX MTU RW - ======== ============================== ============= .. object:: RSS mask The RSS mask field controls which receive queues will be selected by the computed RSS flow hash. .. table:: ======== ====== ====== ====== ====== ============= Address 31..24 23..16 15..8 7..0 Reset value ======== ====== ====== ====== ====== ============= RBB+0x30 RSS mask RW 0x00000000 ======== ============================== =============