6 #include <net/dscp.h>
68  * The priority sources, including Tail Tag, ACL, VLAN PCP and DSCP are ordered
73  * 1. Tail Tag - Highest priority, overrides ACL, VLAN PCP, and DSCP priorities.
74  * 2. ACL - Overrides VLAN PCP and DSCP priorities.
75  * 3. VLAN PCP - Overrides DSCP priority.
76  * 4. DSCP - Lowest priority, does not override any other priority source.
91 	"empty", "dscp", "pcp", "dscp pcp"
109  * ksz_get_dscp_prio_reg - Retrieves the DSCP-to-priority-mapping register
112  * @per_reg: Pointer to the number of DSCP values per register
115  * This function retrieves the DSCP to priority mapping register, the number of
116  * DSCP values per register, and the mask to be set.
216  * ksz_port_get_dscp_prio - Retrieves the priority for a DSCP value on a KSZ
220  * @dscp: DSCP value for which to get the priority
222  * This function fetches the priority value from switch global DSCP-to-priorty
223  * mapping table for the specified DSCP value.
225  * Return: The priority value for the DSCP on success, or a negative error
228 int ksz_port_get_dscp_prio(struct dsa_switch *ds, int port, u8 dscp)  in ksz_port_get_dscp_prio()  argument
236 	/* If DSCP remapping is disabled, DSCP bits 3-5 are used as Internal  in ksz_port_get_dscp_prio()
244 		/* If DSCP remapping is disabled, DSCP bits 3-5 are used as  in ksz_port_get_dscp_prio()
249 					 dscp);  in ksz_port_get_dscp_prio()
252 	/* In case DSCP remapping is enabled, we need to write the DSCP to  in ksz_port_get_dscp_prio()
255 	reg += dscp / per_reg;  in ksz_port_get_dscp_prio()
260 	shift = (dscp % per_reg) * (8 / per_reg);  in ksz_port_get_dscp_prio()
266  * ksz_set_global_dscp_entry - Sets the global DSCP-to-priority mapping entry
268  * @dscp: DSCP value for which to set the priority
271  * This function sets the global DSCP-to-priority mapping entry for the
272  * specified DSCP value.
276 static int ksz_set_global_dscp_entry(struct ksz_device *dev, u8 dscp, u8 ipm)  in ksz_set_global_dscp_entry()  argument
283 	shift = (dscp % per_reg) * (8 / per_reg);  in ksz_set_global_dscp_entry()
285 	return ksz_rmw8(dev, reg + (dscp / per_reg), mask << shift,  in ksz_set_global_dscp_entry()
290  * ksz_init_global_dscp_map - Initializes the global DSCP-to-priority mapping
293  * This function initializes the global DSCP-to-priority mapping table for the
300 	int ret, dscp;  in ksz_init_global_dscp_map()  local
302 	/* On KSZ9xxx variants, DSCP remapping is disabled by default.  in ksz_init_global_dscp_map()
314 	for (dscp = 0; dscp < DSCP_MAX; dscp++) {  in ksz_init_global_dscp_map()
317 		/* Map DSCP to Traffic Type, which is corresponding to the  in ksz_init_global_dscp_map()
321 			ipm = ietf_dscp_to_ieee8021q_tt(dscp);  in ksz_init_global_dscp_map()
324 			 * remapping table. We need to convert DSCP to Traffic  in ksz_init_global_dscp_map()
327 			tt = ietf_dscp_to_ieee8021q_tt(dscp);  in ksz_init_global_dscp_map()
337 		ret = ksz_set_global_dscp_entry(dev, dscp, ipm);  in ksz_init_global_dscp_map()
344  * ksz_port_add_dscp_prio - Adds a DSCP-to-priority mapping entry for a port on
347  * @port: Port number for which to add the DSCP-to-priority mapping entry
348  * @dscp: DSCP value for which to add the priority
353 int ksz_port_add_dscp_prio(struct dsa_switch *ds, int port, u8 dscp, u8 prio)  in ksz_port_add_dscp_prio()  argument
360 	return ksz_set_global_dscp_entry(dev, dscp, prio);  in ksz_port_add_dscp_prio()
364  * ksz_port_del_dscp_prio - Deletes a DSCP-to-priority mapping entry for a port
367  * @port: Port number for which to delete the DSCP-to-priority mapping entry
368  * @dscp: DSCP value for which to delete the priority
373 int ksz_port_del_dscp_prio(struct dsa_switch *ds, int port, u8 dscp, u8 prio)  in ksz_port_del_dscp_prio()  argument
378 	if (ksz_port_get_dscp_prio(ds, port, dscp) != prio)  in ksz_port_del_dscp_prio()
390 	return ksz_set_global_dscp_entry(dev, dscp, ipm);  in ksz_port_del_dscp_prio()
597  * DSCP-to-priority mapping table is initialized.