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DCB: Add support for DCB BCN

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Adds an interface to configure the Backward Congestion Notification
(BCN) feature.  In a BCN capabale network, congestion notifications
from congested points out in the network can cause the end station
limit the rate of a given traffic flow.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Alexander Duyck
2008-11-20 21:10:23 -08:00
committed by David S. Miller
parent 0eb3aa9bab
commit 859ee3c438
5 changed files with 416 additions and 9 deletions
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44
include/linux/dcbnl.h
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@@ -46,6 +46,8 @@ struct dcbmsg {
* @DCB_CMD_GCAP: request the DCB capabilities of the device
* @DCB_CMD_GNUMTCS: get the number of traffic classes currently supported
* @DCB_CMD_SNUMTCS: set the number of traffic classes
* @DCB_CMD_GBCN: set backward congestion notification configuration
* @DCB_CMD_SBCN: get backward congestion notification configration.
*/
enum dcbnl_commands {
DCB_CMD_UNDEFINED,
@@ -62,18 +64,24 @@ enum dcbnl_commands {
DCB_CMD_PFC_SCFG,
DCB_CMD_SET_ALL,
DCB_CMD_GPERM_HWADDR,
DCB_CMD_GCAP,
DCB_CMD_GNUMTCS,
DCB_CMD_SNUMTCS,
DCB_CMD_PFC_GSTATE,
DCB_CMD_PFC_SSTATE,
DCB_CMD_BCN_GCFG,
DCB_CMD_BCN_SCFG,
__DCB_CMD_ENUM_MAX,
DCB_CMD_MAX = __DCB_CMD_ENUM_MAX - 1,
};
/**
* enum dcbnl_attrs - DCB top-level netlink attributes
*
@@ -88,6 +96,7 @@ enum dcbnl_commands {
* @DCB_ATTR_PERM_HWADDR: MAC address of the physical device (NLA_NESTED)
* @DCB_ATTR_CAP: DCB capabilities of the device (NLA_NESTED)
* @DCB_ATTR_NUMTCS: number of traffic classes supported (NLA_NESTED)
* @DCB_ATTR_BCN: backward congestion notification configuration (NLA_NESTED)
*/
enum dcbnl_attrs {
DCB_ATTR_UNDEFINED,
@@ -102,6 +111,7 @@ enum dcbnl_attrs {
DCB_ATTR_PERM_HWADDR,
DCB_ATTR_CAP,
DCB_ATTR_NUMTCS,
DCB_ATTR_BCN,
__DCB_ATTR_ENUM_MAX,
DCB_ATTR_MAX = __DCB_ATTR_ENUM_MAX - 1,
@@ -282,6 +292,38 @@ enum dcbnl_numtcs_attrs {
DCB_NUMTCS_ATTR_MAX = __DCB_NUMTCS_ATTR_ENUM_MAX - 1,
};
enum dcbnl_bcn_attrs{
DCB_BCN_ATTR_UNDEFINED = 0,
DCB_BCN_ATTR_RP_0,
DCB_BCN_ATTR_RP_1,
DCB_BCN_ATTR_RP_2,
DCB_BCN_ATTR_RP_3,
DCB_BCN_ATTR_RP_4,
DCB_BCN_ATTR_RP_5,
DCB_BCN_ATTR_RP_6,
DCB_BCN_ATTR_RP_7,
DCB_BCN_ATTR_RP_ALL,
DCB_BCN_ATTR_ALPHA,
DCB_BCN_ATTR_BETA,
DCB_BCN_ATTR_GD,
DCB_BCN_ATTR_GI,
DCB_BCN_ATTR_TMAX,
DCB_BCN_ATTR_TD,
DCB_BCN_ATTR_RMIN,
DCB_BCN_ATTR_W,
DCB_BCN_ATTR_RD,
DCB_BCN_ATTR_RU,
DCB_BCN_ATTR_WRTT,
DCB_BCN_ATTR_RI,
DCB_BCN_ATTR_C,
DCB_BCN_ATTR_ALL,
__DCB_BCN_ATTR_ENUM_MAX,
DCB_BCN_ATTR_MAX = __DCB_BCN_ATTR_ENUM_MAX - 1,
};
/**
* enum dcb_general_attr_values - general DCB attribute values
*