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net/devlink: Add E-Switch mode control 

Add the commands to set and show the mode of SRIOV E-Switch, two modes
are supported:

* legacy: operating in the "old" L2 based mode (DMAC --> VF vport)

* switchdev: the E-Switch is referred to as whitebox switch configured
using standard tools such as tc, bridge, openvswitch etc. To allow
working with the tools, for each VF, a VF representor netdevice is
created by the E-Switch manager vendor device driver instance (e.g PF).

Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Or Gerlitz 2016-07-01 14:51:01 +03:00 committed by David S. Miller
parent fed9ce22bf
commit 08f4b5918b
3 changed files with 98 additions and 0 deletions
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3
include/net/devlink.h
View File

@ -90,6 +90,9 @@ struct devlink_ops {
u16 tc_index,
enum devlink_sb_pool_type pool_type,
u32 *p_cur, u32 *p_max);
int (*eswitch_mode_get)(struct devlink *devlink, u16 *p_mode);
int (*eswitch_mode_set)(struct devlink *devlink, u16 mode);
};
static inline void *devlink_priv(struct devlink *devlink)

8
include/uapi/linux/devlink.h
View File

@ -57,6 +57,8 @@ enum devlink_command {
DEVLINK_CMD_SB_OCC_SNAPSHOT,
DEVLINK_CMD_SB_OCC_MAX_CLEAR,
DEVLINK_CMD_ESWITCH_MODE_GET,
DEVLINK_CMD_ESWITCH_MODE_SET,
/* add new commands above here */
__DEVLINK_CMD_MAX,
@ -95,6 +97,11 @@ enum devlink_sb_threshold_type {
#define DEVLINK_SB_THRESHOLD_TO_ALPHA_MAX 20
enum devlink_eswitch_mode {
DEVLINK_ESWITCH_MODE_LEGACY,
DEVLINK_ESWITCH_MODE_SWITCHDEV,
};
enum devlink_attr {
/* don't change the order or add anything between, this is ABI! */
DEVLINK_ATTR_UNSPEC,
@ -125,6 +132,7 @@ enum devlink_attr {
DEVLINK_ATTR_SB_TC_INDEX, /* u16 */
DEVLINK_ATTR_SB_OCC_CUR, /* u32 */
DEVLINK_ATTR_SB_OCC_MAX, /* u32 */
DEVLINK_ATTR_ESWITCH_MODE, /* u16 */
/* add new attributes above here, update the policy in devlink.c */

87
net/core/devlink.c
View File

@ -1394,6 +1394,78 @@ static int devlink_nl_cmd_sb_occ_max_clear_doit(struct sk_buff *skb,
return -EOPNOTSUPP;
}
static int devlink_eswitch_fill(struct sk_buff *msg, struct devlink *devlink,
enum devlink_command cmd, u32 portid,
u32 seq, int flags, u16 mode)
{
void *hdr;
hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
if (!hdr)
return -EMSGSIZE;
if (devlink_nl_put_handle(msg, devlink))
goto nla_put_failure;
if (nla_put_u16(msg, DEVLINK_ATTR_ESWITCH_MODE, mode))
goto nla_put_failure;
genlmsg_end(msg, hdr);
return 0;
nla_put_failure:
genlmsg_cancel(msg, hdr);
return -EMSGSIZE;
}
static int devlink_nl_cmd_eswitch_mode_get_doit(struct sk_buff *skb,
struct genl_info *info)
{
struct devlink *devlink = info->user_ptr[0];
const struct devlink_ops *ops = devlink->ops;
struct sk_buff *msg;
u16 mode;
int err;
if (!ops || !ops->eswitch_mode_get)
return -EOPNOTSUPP;
err = ops->eswitch_mode_get(devlink, &mode);
if (err)
return err;
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return -ENOMEM;
err = devlink_eswitch_fill(msg, devlink, DEVLINK_CMD_ESWITCH_MODE_GET,
info->snd_portid, info->snd_seq, 0, mode);
if (err) {
nlmsg_free(msg);
return err;
}
return genlmsg_reply(msg, info);
}
static int devlink_nl_cmd_eswitch_mode_set_doit(struct sk_buff *skb,
struct genl_info *info)
{
struct devlink *devlink = info->user_ptr[0];
const struct devlink_ops *ops = devlink->ops;
u16 mode;
if (!info->attrs[DEVLINK_ATTR_ESWITCH_MODE])
return -EINVAL;
mode = nla_get_u16(info->attrs[DEVLINK_ATTR_ESWITCH_MODE]);
if (ops && ops->eswitch_mode_set)
return ops->eswitch_mode_set(devlink, mode);
return -EOPNOTSUPP;
}
static const struct nla_policy devlink_nl_policy[DEVLINK_ATTR_MAX + 1] = {
[DEVLINK_ATTR_BUS_NAME] = { .type = NLA_NUL_STRING },
[DEVLINK_ATTR_DEV_NAME] = { .type = NLA_NUL_STRING },
@ -1407,6 +1479,7 @@ static const struct nla_policy devlink_nl_policy[DEVLINK_ATTR_MAX + 1] = {
[DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE] = { .type = NLA_U8 },
[DEVLINK_ATTR_SB_THRESHOLD] = { .type = NLA_U32 },
[DEVLINK_ATTR_SB_TC_INDEX] = { .type = NLA_U16 },
[DEVLINK_ATTR_ESWITCH_MODE] = { .type = NLA_U16 },
};
static const struct genl_ops devlink_nl_ops[] = {
@ -1525,6 +1598,20 @@ static const struct genl_ops devlink_nl_ops[] = {
DEVLINK_NL_FLAG_NEED_SB |
DEVLINK_NL_FLAG_LOCK_PORTS,
},
{
.cmd = DEVLINK_CMD_ESWITCH_MODE_GET,
.doit = devlink_nl_cmd_eswitch_mode_get_doit,
.policy = devlink_nl_policy,
.flags = GENL_ADMIN_PERM,
.internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
},
{
.cmd = DEVLINK_CMD_ESWITCH_MODE_SET,
.doit = devlink_nl_cmd_eswitch_mode_set_doit,
.policy = devlink_nl_policy,
.flags = GENL_ADMIN_PERM,
.internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
},
};
/**