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Message-ID: <1292959963.7142.130.camel@lb-tlvb-shmulik.il.broadcom.com>
Date: Tue, 21 Dec 2010 21:32:43 +0200
From: "Shmulik Ravid" <shmulikr@...adcom.com>
To: davem@...emloft.net
cc: eilong@...adcom.com, lucy.liu@...el.com, netdev@...r.kernel.org
Subject: [PATCH net-next 1/3] dcbnl: adding DCBX engine capability
Adding an optional DCBX capability and a pair for get-set routines for
setting the device DCBX mode. The DCBX capability is a bit field of
supported attributes. The user is expected to set the DCBX mode with a
subset of the advertised attributes.
Signed-off-by: Shmulik Ravid <shmulikr@...adcom.com>
---
include/linux/dcbnl.h | 17 +++++++++++++++++
include/net/dcbnl.h | 2 ++
net/dcb/dcbnl.c | 42 ++++++++++++++++++++++++++++++++++++++++++
3 files changed, 61 insertions(+), 0 deletions(-)
diff --git a/include/linux/dcbnl.h b/include/linux/dcbnl.h
index 8723491..974fd1e 100644
--- a/include/linux/dcbnl.h
+++ b/include/linux/dcbnl.h
@@ -50,6 +50,8 @@ struct dcbmsg {
* @DCB_CMD_SBCN: get backward congestion notification configration.
* @DCB_CMD_GAPP: get application protocol configuration
* @DCB_CMD_SAPP: set application protocol configuration
+ * @DCB_CMD_GDCBX: get DCBX engine configuration
+ * @DCB_CMD_SDCBX: set DCBX engine configuration
*/
enum dcbnl_commands {
DCB_CMD_UNDEFINED,
@@ -83,6 +85,9 @@ enum dcbnl_commands {
DCB_CMD_GAPP,
DCB_CMD_SAPP,
+ DCB_CMD_GDCBX,
+ DCB_CMD_SDCBX,
+
__DCB_CMD_ENUM_MAX,
DCB_CMD_MAX = __DCB_CMD_ENUM_MAX - 1,
};
@@ -102,6 +107,7 @@ enum dcbnl_commands {
* @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)
+ * @DCB_ATTR_DCBX: DCBX engine configuration in the device (NLA_U8)
*/
enum dcbnl_attrs {
DCB_ATTR_UNDEFINED,
@@ -118,6 +124,7 @@ enum dcbnl_attrs {
DCB_ATTR_NUMTCS,
DCB_ATTR_BCN,
DCB_ATTR_APP,
+ DCB_ATTR_DCBX,
__DCB_ATTR_ENUM_MAX,
DCB_ATTR_MAX = __DCB_ATTR_ENUM_MAX - 1,
@@ -262,6 +269,8 @@ enum dcbnl_tc_attrs {
* @DCB_CAP_ATTR_GSP: (NLA_U8) device supports group strict priority
* @DCB_CAP_ATTR_BCN: (NLA_U8) device supports Backwards Congestion
* Notification
+ * @DCB_CAP_ATTR_DCBX: (NLA_U8) device supports DCBX engine
+ *
*/
enum dcbnl_cap_attrs {
DCB_CAP_ATTR_UNDEFINED,
@@ -273,11 +282,19 @@ enum dcbnl_cap_attrs {
DCB_CAP_ATTR_PFC_TCS,
DCB_CAP_ATTR_GSP,
DCB_CAP_ATTR_BCN,
+ DCB_CAP_ATTR_DCBX,
__DCB_CAP_ATTR_ENUM_MAX,
DCB_CAP_ATTR_MAX = __DCB_CAP_ATTR_ENUM_MAX - 1,
};
+/* DCBX capabilities */
+#define DCB_CAP_DCBX_HOST 0x01 /* host based DCBX engine support */
+#define DCB_CAP_DCBX_HW 0x02 /* HW DCBX engine support */
+#define DCB_CAP_DCBX_VER_CEE 0x04 /* HW DCBX supports CEE protocol */
+#define DCB_CAP_DCBX_VER_IEEE 0x08 /* HW DCBX supports IEEE protocol */
+#define DCB_CAP_DCBX_STATIC 0x10 /* HW DCBX supports static config */
+
/**
* enum dcbnl_numtcs_attrs - number of traffic classes
*
diff --git a/include/net/dcbnl.h b/include/net/dcbnl.h
index b36ac7e..f03079f 100644
--- a/include/net/dcbnl.h
+++ b/include/net/dcbnl.h
@@ -50,6 +50,8 @@ struct dcbnl_rtnl_ops {
void (*setbcnrp)(struct net_device *, int, u8);
u8 (*setapp)(struct net_device *, u8, u16, u8);
u8 (*getapp)(struct net_device *, u8, u16);
+ u8 (*getdcbx)(struct net_device *);
+ u8 (*setdcbx)(struct net_device *, u8);
};
#endif /* __NET_DCBNL_H__ */
diff --git a/net/dcb/dcbnl.c b/net/dcb/dcbnl.c
index 19ac2b9..44e4237 100644
--- a/net/dcb/dcbnl.c
+++ b/net/dcb/dcbnl.c
@@ -66,6 +66,7 @@ static const struct nla_policy dcbnl_rtnl_policy[DCB_ATTR_MAX + 1] = {
[DCB_ATTR_PFC_STATE] = {.type = NLA_U8},
[DCB_ATTR_BCN] = {.type = NLA_NESTED},
[DCB_ATTR_APP] = {.type = NLA_NESTED},
+ [DCB_ATTR_DCBX] = {.type = NLA_U8},
};
/* DCB priority flow control to User Priority nested attributes */
@@ -122,6 +123,7 @@ static const struct nla_policy dcbnl_cap_nest[DCB_CAP_ATTR_MAX + 1] = {
[DCB_CAP_ATTR_PFC_TCS] = {.type = NLA_U8},
[DCB_CAP_ATTR_GSP] = {.type = NLA_U8},
[DCB_CAP_ATTR_BCN] = {.type = NLA_U8},
+ [DCB_CAP_ATTR_DCBX] = {.type = NLA_U8},
};
/* DCB capabilities nested attributes. */
@@ -1118,6 +1120,38 @@ err:
return ret;
}
+static int dcbnl_getdcbx(struct net_device *netdev, struct nlattr **tb,
+ u32 pid, u32 seq, u16 flags)
+{
+ int ret = -EINVAL;
+
+ if (!netdev->dcbnl_ops->getdcbx)
+ return ret;
+
+ ret = dcbnl_reply(netdev->dcbnl_ops->getdcbx(netdev), RTM_GETDCB,
+ DCB_CMD_GDCBX, DCB_ATTR_DCBX, pid, seq, flags);
+
+ return ret;
+}
+
+static int dcbnl_setdcbx(struct net_device *netdev, struct nlattr **tb,
+ u32 pid, u32 seq, u16 flags)
+{
+ int ret = -EINVAL;
+ u8 value;
+
+ if (!tb[DCB_ATTR_DCBX] || !netdev->dcbnl_ops->setdcbx)
+ return ret;
+
+ value = nla_get_u8(tb[DCB_ATTR_DCBX]);
+
+ ret = dcbnl_reply(netdev->dcbnl_ops->setdcbx(netdev, value),
+ RTM_SETDCB, DCB_CMD_SDCBX, DCB_ATTR_DCBX,
+ pid, seq, flags);
+
+ return ret;
+}
+
static int dcb_doit(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
{
struct net *net = sock_net(skb->sk);
@@ -1223,6 +1257,14 @@ static int dcb_doit(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
ret = dcbnl_setapp(netdev, tb, pid, nlh->nlmsg_seq,
nlh->nlmsg_flags);
goto out;
+ case DCB_CMD_GDCBX:
+ ret = dcbnl_getdcbx(netdev, tb, pid, nlh->nlmsg_seq,
+ nlh->nlmsg_flags);
+ goto out;
+ case DCB_CMD_SDCBX:
+ ret = dcbnl_setdcbx(netdev, tb, pid, nlh->nlmsg_seq,
+ nlh->nlmsg_flags);
+ goto out;
default:
goto errout;
}
--
1.7.1
--
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