devlink: implement shared buffer occupancy monitoring interface

User needs to monitor shared buffer occupancy. For that, he issues a
snapshot command in order to instruct hardware to catch current and
maximal occupancy values, and clear command in order to clear the
historical maximal values.

Also port-pool and tc-pool-bind command response messages are extended to
carry occupancy values.

Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jiri Pirko 2016-04-14 18:19:14 +02:00 committed by David S. Miller
parent bf7974710a
commit df38dafd25
3 changed files with 110 additions and 6 deletions

View File

@ -78,6 +78,18 @@ struct devlink_ops {
u16 tc_index, u16 tc_index,
enum devlink_sb_pool_type pool_type, enum devlink_sb_pool_type pool_type,
u16 pool_index, u32 threshold); u16 pool_index, u32 threshold);
int (*sb_occ_snapshot)(struct devlink *devlink,
unsigned int sb_index);
int (*sb_occ_max_clear)(struct devlink *devlink,
unsigned int sb_index);
int (*sb_occ_port_pool_get)(struct devlink_port *devlink_port,
unsigned int sb_index, u16 pool_index,
u32 *p_cur, u32 *p_max);
int (*sb_occ_tc_port_bind_get)(struct devlink_port *devlink_port,
unsigned int sb_index,
u16 tc_index,
enum devlink_sb_pool_type pool_type,
u32 *p_cur, u32 *p_max);
}; };
static inline void *devlink_priv(struct devlink *devlink) static inline void *devlink_priv(struct devlink *devlink)

View File

@ -53,6 +53,10 @@ enum devlink_command {
DEVLINK_CMD_SB_TC_POOL_BIND_NEW, DEVLINK_CMD_SB_TC_POOL_BIND_NEW,
DEVLINK_CMD_SB_TC_POOL_BIND_DEL, DEVLINK_CMD_SB_TC_POOL_BIND_DEL,
/* Shared buffer occupancy monitoring commands */
DEVLINK_CMD_SB_OCC_SNAPSHOT,
DEVLINK_CMD_SB_OCC_MAX_CLEAR,
/* add new commands above here */ /* add new commands above here */
__DEVLINK_CMD_MAX, __DEVLINK_CMD_MAX,
@ -119,6 +123,8 @@ enum devlink_attr {
DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE, /* u8 */ DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE, /* u8 */
DEVLINK_ATTR_SB_THRESHOLD, /* u32 */ DEVLINK_ATTR_SB_THRESHOLD, /* u32 */
DEVLINK_ATTR_SB_TC_INDEX, /* u16 */ DEVLINK_ATTR_SB_TC_INDEX, /* u16 */
DEVLINK_ATTR_SB_OCC_CUR, /* u32 */
DEVLINK_ATTR_SB_OCC_MAX, /* u32 */
/* add new attributes above here, update the policy in devlink.c */ /* add new attributes above here, update the policy in devlink.c */

View File

@ -280,6 +280,10 @@ devlink_sb_tc_index_get_from_info(struct devlink_sb *devlink_sb,
#define DEVLINK_NL_FLAG_NEED_DEVLINK BIT(0) #define DEVLINK_NL_FLAG_NEED_DEVLINK BIT(0)
#define DEVLINK_NL_FLAG_NEED_PORT BIT(1) #define DEVLINK_NL_FLAG_NEED_PORT BIT(1)
#define DEVLINK_NL_FLAG_NEED_SB BIT(2) #define DEVLINK_NL_FLAG_NEED_SB BIT(2)
#define DEVLINK_NL_FLAG_LOCK_PORTS BIT(3)
/* port is not needed but we need to ensure they don't
* change in the middle of command
*/
static int devlink_nl_pre_doit(const struct genl_ops *ops, static int devlink_nl_pre_doit(const struct genl_ops *ops,
struct sk_buff *skb, struct genl_info *info) struct sk_buff *skb, struct genl_info *info)
@ -306,6 +310,9 @@ static int devlink_nl_pre_doit(const struct genl_ops *ops,
} }
info->user_ptr[0] = devlink_port; info->user_ptr[0] = devlink_port;
} }
if (ops->internal_flags & DEVLINK_NL_FLAG_LOCK_PORTS) {
mutex_lock(&devlink_port_mutex);
}
if (ops->internal_flags & DEVLINK_NL_FLAG_NEED_SB) { if (ops->internal_flags & DEVLINK_NL_FLAG_NEED_SB) {
struct devlink_sb *devlink_sb; struct devlink_sb *devlink_sb;
@ -324,7 +331,8 @@ static int devlink_nl_pre_doit(const struct genl_ops *ops,
static void devlink_nl_post_doit(const struct genl_ops *ops, static void devlink_nl_post_doit(const struct genl_ops *ops,
struct sk_buff *skb, struct genl_info *info) struct sk_buff *skb, struct genl_info *info)
{ {
if (ops->internal_flags & DEVLINK_NL_FLAG_NEED_PORT) if (ops->internal_flags & DEVLINK_NL_FLAG_NEED_PORT ||
ops->internal_flags & DEVLINK_NL_FLAG_LOCK_PORTS)
mutex_unlock(&devlink_port_mutex); mutex_unlock(&devlink_port_mutex);
mutex_unlock(&devlink_mutex); mutex_unlock(&devlink_mutex);
} }
@ -942,12 +950,13 @@ static int devlink_nl_sb_port_pool_fill(struct sk_buff *msg,
enum devlink_command cmd, enum devlink_command cmd,
u32 portid, u32 seq, int flags) u32 portid, u32 seq, int flags)
{ {
const struct devlink_ops *ops = devlink->ops;
u32 threshold; u32 threshold;
void *hdr; void *hdr;
int err; int err;
err = devlink->ops->sb_port_pool_get(devlink_port, devlink_sb->index, err = ops->sb_port_pool_get(devlink_port, devlink_sb->index,
pool_index, &threshold); pool_index, &threshold);
if (err) if (err)
return err; return err;
@ -966,6 +975,22 @@ static int devlink_nl_sb_port_pool_fill(struct sk_buff *msg,
if (nla_put_u32(msg, DEVLINK_ATTR_SB_THRESHOLD, threshold)) if (nla_put_u32(msg, DEVLINK_ATTR_SB_THRESHOLD, threshold))
goto nla_put_failure; goto nla_put_failure;
if (ops->sb_occ_port_pool_get) {
u32 cur;
u32 max;
err = ops->sb_occ_port_pool_get(devlink_port, devlink_sb->index,
pool_index, &cur, &max);
if (err && err != -EOPNOTSUPP)
return err;
if (!err) {
if (nla_put_u32(msg, DEVLINK_ATTR_SB_OCC_CUR, cur))
goto nla_put_failure;
if (nla_put_u32(msg, DEVLINK_ATTR_SB_OCC_MAX, max))
goto nla_put_failure;
}
}
genlmsg_end(msg, hdr); genlmsg_end(msg, hdr);
return 0; return 0;
@ -1114,14 +1139,15 @@ devlink_nl_sb_tc_pool_bind_fill(struct sk_buff *msg, struct devlink *devlink,
enum devlink_command cmd, enum devlink_command cmd,
u32 portid, u32 seq, int flags) u32 portid, u32 seq, int flags)
{ {
const struct devlink_ops *ops = devlink->ops;
u16 pool_index; u16 pool_index;
u32 threshold; u32 threshold;
void *hdr; void *hdr;
int err; int err;
err = devlink->ops->sb_tc_pool_bind_get(devlink_port, devlink_sb->index, err = ops->sb_tc_pool_bind_get(devlink_port, devlink_sb->index,
tc_index, pool_type, tc_index, pool_type,
&pool_index, &threshold); &pool_index, &threshold);
if (err) if (err)
return err; return err;
@ -1144,6 +1170,24 @@ devlink_nl_sb_tc_pool_bind_fill(struct sk_buff *msg, struct devlink *devlink,
if (nla_put_u32(msg, DEVLINK_ATTR_SB_THRESHOLD, threshold)) if (nla_put_u32(msg, DEVLINK_ATTR_SB_THRESHOLD, threshold))
goto nla_put_failure; goto nla_put_failure;
if (ops->sb_occ_tc_port_bind_get) {
u32 cur;
u32 max;
err = ops->sb_occ_tc_port_bind_get(devlink_port,
devlink_sb->index,
tc_index, pool_type,
&cur, &max);
if (err && err != -EOPNOTSUPP)
return err;
if (!err) {
if (nla_put_u32(msg, DEVLINK_ATTR_SB_OCC_CUR, cur))
goto nla_put_failure;
if (nla_put_u32(msg, DEVLINK_ATTR_SB_OCC_MAX, max))
goto nla_put_failure;
}
}
genlmsg_end(msg, hdr); genlmsg_end(msg, hdr);
return 0; return 0;
@ -1326,6 +1370,30 @@ static int devlink_nl_cmd_sb_tc_pool_bind_set_doit(struct sk_buff *skb,
pool_index, threshold); pool_index, threshold);
} }
static int devlink_nl_cmd_sb_occ_snapshot_doit(struct sk_buff *skb,
struct genl_info *info)
{
struct devlink *devlink = info->user_ptr[0];
struct devlink_sb *devlink_sb = info->user_ptr[1];
const struct devlink_ops *ops = devlink->ops;
if (ops && ops->sb_occ_snapshot)
return ops->sb_occ_snapshot(devlink, devlink_sb->index);
return -EOPNOTSUPP;
}
static int devlink_nl_cmd_sb_occ_max_clear_doit(struct sk_buff *skb,
struct genl_info *info)
{
struct devlink *devlink = info->user_ptr[0];
struct devlink_sb *devlink_sb = info->user_ptr[1];
const struct devlink_ops *ops = devlink->ops;
if (ops && ops->sb_occ_max_clear)
return ops->sb_occ_max_clear(devlink, devlink_sb->index);
return -EOPNOTSUPP;
}
static const struct nla_policy devlink_nl_policy[DEVLINK_ATTR_MAX + 1] = { static const struct nla_policy devlink_nl_policy[DEVLINK_ATTR_MAX + 1] = {
[DEVLINK_ATTR_BUS_NAME] = { .type = NLA_NUL_STRING }, [DEVLINK_ATTR_BUS_NAME] = { .type = NLA_NUL_STRING },
[DEVLINK_ATTR_DEV_NAME] = { .type = NLA_NUL_STRING }, [DEVLINK_ATTR_DEV_NAME] = { .type = NLA_NUL_STRING },
@ -1439,6 +1507,24 @@ static const struct genl_ops devlink_nl_ops[] = {
.internal_flags = DEVLINK_NL_FLAG_NEED_PORT | .internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
DEVLINK_NL_FLAG_NEED_SB, DEVLINK_NL_FLAG_NEED_SB,
}, },
{
.cmd = DEVLINK_CMD_SB_OCC_SNAPSHOT,
.doit = devlink_nl_cmd_sb_occ_snapshot_doit,
.policy = devlink_nl_policy,
.flags = GENL_ADMIN_PERM,
.internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
DEVLINK_NL_FLAG_NEED_SB |
DEVLINK_NL_FLAG_LOCK_PORTS,
},
{
.cmd = DEVLINK_CMD_SB_OCC_MAX_CLEAR,
.doit = devlink_nl_cmd_sb_occ_max_clear_doit,
.policy = devlink_nl_policy,
.flags = GENL_ADMIN_PERM,
.internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
DEVLINK_NL_FLAG_NEED_SB |
DEVLINK_NL_FLAG_LOCK_PORTS,
},
}; };
/** /**