Commit 1df99338 authored by Daniel Machon's avatar Daniel Machon Committed by David S. Miller
Browse files

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: default avatarDaniel Machon <daniel.machon@microchip.com>
Reviewed-by: default avatarPetr Machata <petrm@nvidia.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 622f1b2f

include/net/dcbnl.h

+10 −0
Original line number Diff line number Diff line
@@ -29,12 +29,22 @@ int dcb_ieee_setapp(struct net_device *, struct dcb_app *); 
int dcb_ieee_delapp(struct net_device *, struct dcb_app *);

u8 dcb_ieee_getapp_mask(struct net_device *, struct dcb_app *);



struct dcb_rewr_prio_pcp_map {

	u16 map[IEEE_8021QAZ_MAX_TCS];

};



void dcb_getrewr_prio_pcp_mask_map(const struct net_device *dev,

				   struct dcb_rewr_prio_pcp_map *p_map);



struct dcb_ieee_app_prio_map {

	u64 map[IEEE_8021QAZ_MAX_TCS];

};

void dcb_ieee_getapp_prio_dscp_mask_map(const struct net_device *dev,

					struct dcb_ieee_app_prio_map *p_map);



void dcb_getrewr_prio_dscp_mask_map(const struct net_device *dev,

				    struct dcb_ieee_app_prio_map *p_map);



struct dcb_ieee_app_dscp_map {

	u8 map[64];

};

net/dcb/dcbnl.c

+52 −0
Original line number Diff line number Diff line
@@ -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