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Add notes and information for exposed tuneables in bce(4).

Browse Source 
Add source of documentation for this driver.

Thanks to Warren Block for the suggestions for readability.

Note that strict_rx_mtu in inverted in stable/7/8/9 and is
named loose_rx_mtu.  Ensure that this is converted over when MFC'd

hw.bce.rx_ticks
hw.bce.rx_ticks_int
hw.bce.rx_quick_cons_trip
hw.bce.rx_quick_cons_trip_int
hw.bce.tx_ticks
hw.bce.tx_ticks_int
hw.bce.tx_quick_cons_trip
hw.bce.tx_quick_cons_trip_int
hw.bce.strict_rx_mtu
hw.bce.hdr_split
hw.bce.tx_pages
hw.bce.rx_pages
hw.bce.tso_enable
hw.bce.verbose

Reviewed by:  Warren Block <wblock@wonkity.com>
MFC after:	3 days
This commit is contained in:
Sean Bruno 2012-06-01 18:01:51 +00:00
parent d3638dc4de
commit ffc06c80d8
1 changed files with 59 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

62
share/man/man4/bce.4
View File

@ -200,9 +200,60 @@ variables and
.Xr loader 8
tunables:
.Bl -tag -width indent
.It Va hw.bce.verbose
Enable/Disable verbose logging and output to the console.
Useful for debugging (default 0).
.It Va hw.bce.msi_enable
Whether or not MSI support is enabled in the driver.
The default value is 1.
Enable/Disable MSI support (default 1).
.It Va hw.bce.tso_enable
Enable/Disable TSO support (default 1).
.It Va hw.bce.strict_rx_mtu
Enable/Disable strict RX frame size checking (default 0).
.It Va hw.bce.hdr_split
Enable/Disable frame header/payload splitting (default 1).
.It Va hw.bce.rx_pages
Set the number of memory pages assigned to recieve packets by the driver.
Due to alignment issues, this value can only be of the set 1, 2, 4 or 8 (default 2).
.It Va hw.bce.tx_pages
Set the number of memory pages assigned to transmit packets by the driver.
Due to alignment issues, this value can only be of the set 1, 2, 4 or 8 (default 2).
.It Va hw.bce.rx_ticks
Time in microsecond ticks to wait before generating a status block updates due to RX processing activity.
Values from 0-100 are valid.
A value of 0 disables this status block update.
Cannot be set to 0 if hw.bce.rx_quick_cons_trip is also 0 (default 18).
.It Va hw.bce.rx_ticks_int
Time in microsecond ticks to wait during RX interrupt processing before generating a status block update.
Values from 0-100 are valid.
Valid values are in the range from 0-100.
A value of 0 disables this status block update (default 18).
.It Va hw.bce.rx_quick_cons_trip
Number of RX Quick BD Chain entries that must be completed before a status block is generated.
Values from 0-256 are valid.
A value of 0 disables this status block update.
Cannot be set to 0 if hw.bce.rx_ticks is also 0 (default 6).
.It Va hw.bce.rx_quick_cons_trip_int
Number of RX quick BD entries that must be completed before a status block is generated duing interrupt processing.
Values from 0-256 are valid.
A value of 0 disables this status block update (default 6).
.It Va hw.bce.tx_ticks
Time in microsecond ticks to wait before a status block update is generated due to TX activitiy.
Values from 0-100 are valid.
A value of 0 disables this status block update.
Cannot be set to 0 if hw.bce.tx_quick_cons_trip is also 0 (default 80).
.It Va hw.bce.tx_ticks_int
Time in microsecond ticks to wait in interrupt processing before a status block update is generated due to TX activity
Values from 0-100 are valid.
A value of 0 disables this status block update (default 80).
.It Va hw.bce.tx_cons_trip
How many TX Quick BD Chain entries that must be completed before a status block is generated.
Values from 0-100 are valid.
A value of 0 disables this status block update.
Cannot be set to 0 if hw.bce.tx_ticks is also 0 (default 20).
.It Va hw.bce.tx_cons_trip_int
How many TX Quick BD Chain entries that must be completed before a status block is generated during an interrupt.
Values from 0-100 are valid.
A value of 0 disables this status block update (default 20).
.El
.Sh DIAGNOSTICS
.Bl -diag
@ -266,7 +317,7 @@ address space.
.It "bce%d: Could not allocate TX descriptor chain DMA tag!"
The driver could not allocate a DMA tag for the controller's
TX chain.
.It "bce%d: Could not allocate TX descriptor chain DMA memory!"
.It "bce%d: Could not allocate TX descriptor chain DMA memory!
The driver could not allocate DMA addressable memory for the controller's
TX chain.
.It "bce%d: Could not map TX descriptor chain DMA memory!"
@ -346,6 +397,11 @@ with the cable connection, or a driver logic problem has occurred..
A controller hardware failure has occurred.
If the problem continues replace the controller.
.El
.Sh SUPPORT
For general information and support,
go to the Broadcom NIC Open Source Developer Resource Site:
.Pa http://www.broadcom.com/support/ethernet_nic/open_source.php .
.Pp
.Sh SEE ALSO
.Xr altq 4 ,
.Xr arp 4 ,