.. _rb_qm_tx: ===================================== Transmit queue manager register block ===================================== The transmit queue manager register block has a header with type 0x0000C020, version 0x00000200, and indicates the location of the transmit queue manager registers and number of queues. .. table:: ======== ============= ====== ====== ====== ====== ============= Address Field 31..24 23..16 15..8 7..0 Reset value ======== ============= ====== ====== ====== ====== ============= RBB+0x00 Type Vendor ID Type RO 0x0000C020 -------- ------------- -------------- -------------- ------------- RBB+0x04 Version Major Minor Patch Meta RO 0x00000200 -------- ------------- ------ ------ ------ ------ ------------- RBB+0x08 Next pointer Pointer to next register block RO - -------- ------------- ------------------------------ ------------- RBB+0x0C Offset Offset to queue manager RO - -------- ------------- ------------------------------ ------------- RBB+0x10 Count Queue count RO - -------- ------------- ------------------------------ ------------- RBB+0x14 Stride Queue control register stride RO 0x00000020 ======== ============= ============================== ============= See :ref:`rb_overview` for definitions of the standard register block header fields. .. object:: Offset The offset field contains the offset to the start of the transmit queue manager region, relative to the start of the current region. .. table:: ======== ====== ====== ====== ====== ============= Address 31..24 23..16 15..8 7..0 Reset value ======== ====== ====== ====== ====== ============= RBB+0x0C Offset to queue manager RO - ======== ============================== ============= .. object:: Count The count field contains the number of queues. .. table:: ======== ====== ====== ====== ====== ============= Address 31..24 23..16 15..8 7..0 Reset value ======== ====== ====== ====== ====== ============= RBB+0x10 Queue count RO - ======== ============================== ============= .. object:: Stride The stride field contains the size of the control registers associated with each queue. .. table:: ======== ====== ====== ====== ====== ============= Address 31..24 23..16 15..8 7..0 Reset value ======== ====== ====== ====== ====== ============= RBB+0x14 Queue control register stride RO 0x00000020 ======== ============================== ============= Queue manager CSRs ================== Each queue has several associated control registers, detailed in this table: .. table:: ========= ============== ====== ====== ====== ====== ============= Address Field 31..24 23..16 15..8 7..0 Reset value ========= ============== ====== ====== ====== ====== ============= Base+0x00 Base address L Ring base address (lower 32) RW - --------- -------------- ------------------------------ ------------- Base+0x04 Base address H Ring base address (upper 32) RW - --------- -------------- ------------------------------ ------------- Base+0x08 Control 1 Active Size RW - --------- -------------- ------ ------ ------ ------ ------------- Base+0x0C Control 2 CQ index RW - --------- -------------- -------------- -------------- ------------- Base+0x10 Head pointer Head pointer RW - --------- -------------- -------------- -------------- ------------- Base+0x18 Tail pointer Tail pointer RW - ========= ============== ============== ============== =============