1 // SPDX-License-Identifier: GPL-2.0
13 /* Port X Control 0 register.
14  * The datasheet specifies: Port 1 - 0x10, Port 2 - 0x20, Port 3 - 0x30.
15  * However, the driver uses get_port_addr(), which maps Port 1 to offset 0.
61 /* ksz_supported_apptrust[] - Supported apptrust selectors and Priority Order
65  * the index within the array indicates the priority of the selector - lower
72  * non-configurable precedence where certain types of priority information
75  * 1. Tail Tag - Highest priority, overrides ACL, VLAN PCP, and DSCP priorities.
76  * 2. ACL - Overrides VLAN PCP and DSCP priorities.
77  * 3. VLAN PCP - Overrides DSCP priority.
78  * 4. DSCP - Lowest priority, does not override any other priority source.
84  * DCB_APP_SEL_PCP - Priority Code Point selector
85  * IEEE_8021QAZ_APP_SEL_DSCP - Differentiated Services Code Point selector
113  * ksz_get_dscp_prio_reg - Retrieves the DSCP-to-priority-mapping register
116  * @per_reg: Pointer to the number of DSCP values per register
119  * This function retrieves the DSCP to priority mapping register, the number of
143  * ksz_get_apptrust_map_and_reg - Retrieves the apptrust map and register
171  * ksz_port_get_default_prio - Retrieves the default priority for a port on a
174  * @port: Port number from which to get the default priority
176  * This function fetches the default priority for the specified port on a KSZ
179  * Return: The default priority of the port on success, or a negative error
182 int ksz_port_get_default_prio(struct dsa_switch *ds, int port)  in ksz_port_get_default_prio()  argument
184 	struct ksz_device *dev = ds->priv;  in ksz_port_get_default_prio()
190 	ret = ksz_pread8(dev, port, reg, &data);  in ksz_port_get_default_prio()
198  * ksz_port_set_default_prio - Sets the default priority for a port on a KSZ
201  * @port: Port number for which to set the default priority
204  * This function sets the default priority for the specified port on a KSZ
209 int ksz_port_set_default_prio(struct dsa_switch *ds, int port, u8 prio)  in ksz_port_set_default_prio()  argument
211 	struct ksz_device *dev = ds->priv;  in ksz_port_set_default_prio()
215 	if (prio >= dev->info->num_ipms)  in ksz_port_set_default_prio()
216 		return -EINVAL;  in ksz_port_set_default_prio()
220 	return ksz_prmw8(dev, port, reg, mask, (prio << shift) & mask);  in ksz_port_set_default_prio()
224  * ksz_port_get_dscp_prio - Retrieves the priority for a DSCP value on a KSZ
227  * @port: Port number for which to get the priority
230  * This function fetches the priority value from switch global DSCP-to-priorty
236 int ksz_port_get_dscp_prio(struct dsa_switch *ds, int port, u8 dscp)  in ksz_port_get_dscp_prio()  argument
238 	struct ksz_device *dev = ds->priv;  in ksz_port_get_dscp_prio()
244 	/* If DSCP remapping is disabled, DSCP bits 3-5 are used as Internal  in ksz_port_get_dscp_prio()
252 		/* If DSCP remapping is disabled, DSCP bits 3-5 are used as  in ksz_port_get_dscp_prio()
274  * ksz_set_global_dscp_entry - Sets the global DSCP-to-priority mapping entry
279  * This function sets the global DSCP-to-priority mapping entry for the
298  * ksz_init_global_dscp_map - Initializes the global DSCP-to-priority mapping
301  * This function initializes the global DSCP-to-priority mapping table for the
339 			ipm = ieee8021q_tt_to_tc(tt, dev->info->num_tx_queues);  in ksz_init_global_dscp_map()
352  * ksz_port_add_dscp_prio - Adds a DSCP-to-priority mapping entry for a port on
355  * @port: Port number for which to add the DSCP-to-priority mapping entry
361 int ksz_port_add_dscp_prio(struct dsa_switch *ds, int port, u8 dscp, u8 prio)  in ksz_port_add_dscp_prio()  argument
363 	struct ksz_device *dev = ds->priv;  in ksz_port_add_dscp_prio()
365 	if (prio >= dev->info->num_ipms)  in ksz_port_add_dscp_prio()
366 		return -ERANGE;  in ksz_port_add_dscp_prio()
372  * ksz_port_del_dscp_prio - Deletes a DSCP-to-priority mapping entry for a port
375  * @port: Port number for which to delete the DSCP-to-priority mapping entry
381 int ksz_port_del_dscp_prio(struct dsa_switch *ds, int port, u8 dscp, u8 prio)  in ksz_port_del_dscp_prio()  argument
383 	struct ksz_device *dev = ds->priv;  in ksz_port_del_dscp_prio()
386 	if (ksz_port_get_dscp_prio(ds, port, dscp) != prio)  in ksz_port_del_dscp_prio()
391 					 dev->info->num_tx_queues);  in ksz_port_del_dscp_prio()
402  * ksz_apptrust_error - Prints an error message for an invalid apptrust selector
423 	dev_err(dev->dev, "Invalid apptrust selector or priority order. Supported: %s\n",  in ksz_apptrust_error()
428  * ksz_port_set_apptrust_validate - Validates the apptrust selectors
430  * @port: Port number for which to set the apptrust selectors
432  * @nsel: Number of apptrust selectors in the array
440  * 1. DCB_APP_SEL_PCP - Priority Code Point selector (highest priority)
441  * 2. IEEE_8021QAZ_APP_SEL_DSCP - Differentiated Services Code Point selector
446 static int ksz_port_set_apptrust_validate(struct ksz_device *dev, int port,  in ksz_port_set_apptrust_validate()  argument
482 	return -EINVAL;  in ksz_port_set_apptrust_validate()
486  * ksz_port_set_apptrust - Sets the apptrust selectors for a port on a KSZ
489  * @port: Port number for which to set the apptrust selectors
491  * @nsel: Number of apptrust selectors in the array
493  * This function sets the apptrust selectors for the specified port on a KSZ
498 int ksz_port_set_apptrust(struct dsa_switch *ds, int port,  in ksz_port_set_apptrust()  argument
502 	struct ksz_device *dev = ds->priv;  in ksz_port_set_apptrust()
507 	ret = ksz_port_set_apptrust_validate(dev, port, sel, nsel);  in ksz_port_set_apptrust()
525 	return ksz_prmw8(dev, port, reg, mask, data);  in ksz_port_set_apptrust()
529  * ksz_port_get_apptrust - Retrieves the apptrust selectors for a port on a KSZ
532  * @port: Port number for which to get the apptrust selectors
534  * @nsel: Number of apptrust selectors in the array
536  * This function fetches the apptrust selectors for the specified port on a KSZ
541 int ksz_port_get_apptrust(struct dsa_switch *ds, int port, u8 *sel, int *nsel)  in ksz_port_get_apptrust()  argument
544 	struct ksz_device *dev = ds->priv;  in ksz_port_get_apptrust()
551 	ret = ksz_pread8(dev, port, reg, &data);  in ksz_port_get_apptrust()
565  * ksz_dcb_init_port - Initializes the DCB configuration for a port on a KSZ
567  * @port: Port number for which to initialize the DCB configuration
569  * This function initializes the DCB configuration for the specified port on a
570  * KSZ switch. Particular DCB configuration is set for the port, including the
577 int ksz_dcb_init_port(struct ksz_device *dev, int port)  in ksz_dcb_init_port()  argument
584 					 dev->info->num_tx_queues);  in ksz_dcb_init_port()
591 	/* Set the default priority for the port to Best Effort */  in ksz_dcb_init_port()
592 	ret = ksz_port_set_default_prio(dev->ds, port, ipm);  in ksz_dcb_init_port()
596 	return ksz_port_set_apptrust(dev->ds, port, ksz_default_apptrust,  in ksz_dcb_init_port()
601  * ksz_dcb_init - Initializes the DCB configuration for a KSZ switch
605  * DSCP-to-priority mapping table is initialized.