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87 lines
4.0 KiB
ReStructuredText
87 lines
4.0 KiB
ReStructuredText
.. _rb_qm_rx:
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=====================================
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Receive queue manager register block
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=====================================
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The receive queue manager register block has a header with type 0x0000C021, version 0x00000200, and indicates the location of the receive queue manager registers and number of queues.
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.. table::
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======== ============= ====== ====== ====== ====== =============
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Address Field 31..24 23..16 15..8 7..0 Reset value
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======== ============= ====== ====== ====== ====== =============
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RBB+0x00 Type Vendor ID Type RO 0x0000C021
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-------- ------------- -------------- -------------- -------------
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RBB+0x04 Version Major Minor Patch Meta RO 0x00000200
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-------- ------------- ------ ------ ------ ------ -------------
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RBB+0x08 Next pointer Pointer to next register block RO -
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-------- ------------- ------------------------------ -------------
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RBB+0x0C Offset Offset to queue manager RO -
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-------- ------------- ------------------------------ -------------
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RBB+0x10 Count Queue count RO -
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-------- ------------- ------------------------------ -------------
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RBB+0x14 Stride Queue control register stride RO 0x00000020
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======== ============= ============================== =============
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See :ref:`rb_overview` for definitions of the standard register block header fields.
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.. object:: Offset
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The offset field contains the offset to the start of the receive queue manager region, relative to the start of the current region.
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.. table::
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======== ====== ====== ====== ====== =============
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Address 31..24 23..16 15..8 7..0 Reset value
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======== ====== ====== ====== ====== =============
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RBB+0x0C Offset to queue manager RO -
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======== ============================== =============
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.. object:: Count
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The count field contains the number of queues.
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.. table::
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======== ====== ====== ====== ====== =============
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Address 31..24 23..16 15..8 7..0 Reset value
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======== ====== ====== ====== ====== =============
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RBB+0x10 Queue count RO -
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======== ============================== =============
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.. object:: Stride
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The stride field contains the size of the control registers associated with each queue.
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.. table::
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======== ====== ====== ====== ====== =============
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Address 31..24 23..16 15..8 7..0 Reset value
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======== ====== ====== ====== ====== =============
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RBB+0x14 Queue control register stride RO 0x00000020
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======== ============================== =============
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Queue manager CSRs
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==================
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Each queue has several associated control registers, detailed in this table:
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.. table::
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========= ============== ====== ====== ====== ====== =============
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Address Field 31..24 23..16 15..8 7..0 Reset value
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========= ============== ====== ====== ====== ====== =============
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Base+0x00 Base address L Ring base address (lower 32) RW -
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--------- -------------- ------------------------------ -------------
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Base+0x04 Base address H Ring base address (upper 32) RW -
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--------- -------------- ------------------------------ -------------
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Base+0x08 Control 1 Active Size RW -
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--------- -------------- ------ ------ ------ ------ -------------
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Base+0x0C Control 2 CQ index RW -
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--------- -------------- -------------- -------------- -------------
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Base+0x10 Head pointer Head pointer RW -
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--------- -------------- -------------- -------------- -------------
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Base+0x18 Tail pointer Tail pointer RW -
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========= ============== ============== ============== =============
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