Table 100: Msi-X Host Coalescing Parameters - Broadcom NetXtreme/NetLink BCM5718 Series Programmer's Manual

BCM5718 Programmer's Guide
Each of these new sets have the same behavior or attribute as defined in
(Offset: 0x3c08)" on page 253
except one aspect: when MSI-X Multivector mode is enabled, each of these sets associate with its respective
Status-Block[n]. However, when either MSI-X is disabled or MSI-X Single-Vector mode is enabled, none of these
additional sets would exist. Note that, when MSI-X Single-Vector mode is enabled, even though 5 (or 17) vectors
are advertised, only Vector#0 remains active.
Note: To further clarify, in Legacy INTx mode, MSI mode, or MSI-X Single Vector mode, all Transmit
and Receive queues are metered collectively by HC Parameter Set [0]. Parameter Sets [1–16] do not
exist. Only in Multivector MSI-X mode do HC Parameter Sets [1–16] come into existence.
Table 100 summarizes the existence of HC Parameter Sets, and their association to Status-Blocks. An "----"
indicates that this register does not exist in this particular mode.
IOV-Mode +
Multiple TXQ
Valid
(Netqueue/ VMQ+TSS)
HC
Parameter
HC
Register
Invokes Parameter
Set
Status Registers
Block# Address
RCTR[0] 0 0x3C08
SCTR[0] ------
RMCBCR[0] 0x3C10
SMCBCR[0] ------
RMCBCDIR[0] 0x3C18
SMCBCDIR[0] ------
RCTR[1] 1 0x3D80
SCTR[1] 0x3D84
RMCBCR[1] 0x3D88
SMCBCR[1] 0x3D8C
RMCBCDIR[1] 0x3D90
SMCBCDIR[1] 0x3D94
RCTR[2] 2 0x3D98
SCTR[2] 0x3D9C
RMCBCR[2] 0x3DA0
SMCBCR[2] 0x3DA4
RMCBCDIR[2] 0x3DA8
SMCBCDIR[2] 0x3DAC
RCTR[3] 3 0x3DB0
SCTR[3] 0x3DB4
RMCBCR[3] 0x3DB8
SMCBCR[3] 0x3DBC
RMCBCDIR[3] 0x3DC0
SMCBCDIR[3] 0x3DC4
Broadcom
®
January 29, 2016 • 5718-PG108-R
and "Receive Max Coalesced Bd Count Register (Offset: 0x3c10)" on page

Table 100: MSI-X Host Coalescing Parameters

IOV-Mode +
Single TXQ
(VMQ)
HC
Parameter
Indication
Registers
Items Address
0x3C08
VRQ 0 0x3C0C
0x3C10
LinkStat 0x3C14
Errors 0x3C20
VRQ Map 0x3C24
0x3D80
VRQ 1 -----
TXQ 1 0x3D88
-----
0x3D90
-----
0x3D98
VRQ 2 ----
TXQ 2 0x3DA0
-----
0x3DA8
-----
0x3DB0
VRQ 3 -----
TXQ 3 0x3DB8
-----
0x3DC0
-----
"Receive Coalescing Ticks Register
RSS-Mode +
Multiple TXQ
(TSS)
HC
Parameter
Indication Indication
Registers
Items Address Items
-----
VRQ 0 -----
TX -----
LinkStat ----- LinkStat
Errors ----- Errors
VRQ Map -----
0x3D80
VRQ 1 0x3D84 RSS 0
0x3D88 TXQ 1
0x3D8C
0x3D90
0x3D94
0x3D98
VRQ 2 0x3D9C RSS 1
0x3DA0 TXQ 2
0x3DA4
0x3DA8
0x3DAC
0x3DB0
VRQ 3 0x3DB4 RSS 2
0x3DB8 TXQ 3
0x3DBC
0x3DC0
0x3DC4
MSI-X Plumbing
254,
RSS-Mode +
Single TXQ
(Legacy)
HC
Parameter
Indication
Registers
Address Item
-----
0x3C0C
----- TX
0x3C14 LinkStat
----- Errors
0x3C24
0x3D80
----- RSS 0
0x3D88
-----
0x3D90
-----
0x3D98
---- RSS 1
0x3DA0
-----
0x3DA8
-----
0x3DB0
----- RSS 2
0x3DB8
-----
0x3DC0
-----
Page 256