From 1df99338e6d4e96178b68b3e17bab33e9f1eb628 Mon Sep 17 00:00:00 2001 From: Daniel Machon Date: Wed, 18 Jan 2023 22:08:28 +0100 Subject: net: dcb: add helper functions to retrieve PCP and DSCP rewrite maps Add two new helper functions to retrieve a mapping of priority to PCP and DSCP bitmasks, where each bitmap contains ones in positions that match a rewrite entry. dcb_ieee_getrewr_prio_dscp_mask_map() reuses the dcb_ieee_app_prio_map, as this struct is already used for a similar mapping in the app table. Signed-off-by: Daniel Machon Reviewed-by: Petr Machata Signed-off-by: David S. Miller --- net/dcb/dcbnl.c | 52 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 52 insertions(+) (limited to 'net') diff --git a/net/dcb/dcbnl.c b/net/dcb/dcbnl.c index 2ca7fffcf069..c0c438128575 100644 --- a/net/dcb/dcbnl.c +++ b/net/dcb/dcbnl.c @@ -2232,6 +2232,58 @@ int dcb_ieee_delapp(struct net_device *dev, struct dcb_app *del) } EXPORT_SYMBOL(dcb_ieee_delapp); +/* dcb_getrewr_prio_pcp_mask_map - For a given device, find mapping from + * priorities to the PCP and DEI values assigned to that priority. + */ +void dcb_getrewr_prio_pcp_mask_map(const struct net_device *dev, + struct dcb_rewr_prio_pcp_map *p_map) +{ + int ifindex = dev->ifindex; + struct dcb_app_type *itr; + u8 prio; + + memset(p_map->map, 0, sizeof(p_map->map)); + + spin_lock_bh(&dcb_lock); + list_for_each_entry(itr, &dcb_rewr_list, list) { + if (itr->ifindex == ifindex && + itr->app.selector == DCB_APP_SEL_PCP && + itr->app.protocol < 16 && + itr->app.priority < IEEE_8021QAZ_MAX_TCS) { + prio = itr->app.priority; + p_map->map[prio] |= 1 << itr->app.protocol; + } + } + spin_unlock_bh(&dcb_lock); +} +EXPORT_SYMBOL(dcb_getrewr_prio_pcp_mask_map); + +/* dcb_getrewr_prio_dscp_mask_map - For a given device, find mapping from + * priorities to the DSCP values assigned to that priority. + */ +void dcb_getrewr_prio_dscp_mask_map(const struct net_device *dev, + struct dcb_ieee_app_prio_map *p_map) +{ + int ifindex = dev->ifindex; + struct dcb_app_type *itr; + u8 prio; + + memset(p_map->map, 0, sizeof(p_map->map)); + + spin_lock_bh(&dcb_lock); + list_for_each_entry(itr, &dcb_rewr_list, list) { + if (itr->ifindex == ifindex && + itr->app.selector == IEEE_8021QAZ_APP_SEL_DSCP && + itr->app.protocol < 64 && + itr->app.priority < IEEE_8021QAZ_MAX_TCS) { + prio = itr->app.priority; + p_map->map[prio] |= 1ULL << itr->app.protocol; + } + } + spin_unlock_bh(&dcb_lock); +} +EXPORT_SYMBOL(dcb_getrewr_prio_dscp_mask_map); + /* * dcb_ieee_getapp_prio_dscp_mask_map - For a given device, find mapping from * priorities to the DSCP values assigned to that priority. Initialize p_map -- cgit v1.2.3