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.
59 /* ksz_supported_apptrust[] - Supported apptrust selectors and Priority Order
63  * the index within the array indicates the priority of the selector - lower
70  * non-configurable precedence where certain types of priority information
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.
82  * DCB_APP_SEL_PCP - Priority Code Point selector
83  * IEEE_8021QAZ_APP_SEL_DSCP - Differentiated Services Code Point selector
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
137  * ksz_get_apptrust_map_and_reg - Retrieves the apptrust map and register
163  * ksz_port_get_default_prio - Retrieves the default priority for a port on a
166  * @port: Port number from which to get the default priority
168  * This function fetches the default priority for the specified port on a KSZ
171  * Return: The default priority of the port on success, or a negative error
174 int ksz_port_get_default_prio(struct dsa_switch *ds, int port)  in ksz_port_get_default_prio()  argument
176 	struct ksz_device *dev = ds->priv;  in ksz_port_get_default_prio()
182 	ret = ksz_pread8(dev, port, reg, &data);  in ksz_port_get_default_prio()
190  * ksz_port_set_default_prio - Sets the default priority for a port on a KSZ
193  * @port: Port number for which to set the default priority
196  * This function sets the default priority for the specified port on a KSZ
201 int ksz_port_set_default_prio(struct dsa_switch *ds, int port, u8 prio)  in ksz_port_set_default_prio()  argument
203 	struct ksz_device *dev = ds->priv;  in ksz_port_set_default_prio()
207 	if (prio >= dev->info->num_ipms)  in ksz_port_set_default_prio()
208 		return -EINVAL;  in ksz_port_set_default_prio()
212 	return ksz_prmw8(dev, port, reg, mask, (prio << shift) & mask);  in ksz_port_set_default_prio()
216  * ksz_port_get_dscp_prio - Retrieves the priority for a DSCP value on a KSZ
219  * @port: Port number for which to get the priority
222  * This function fetches the priority value from switch global DSCP-to-priorty
228 int ksz_port_get_dscp_prio(struct dsa_switch *ds, int port, u8 dscp)  in ksz_port_get_dscp_prio()  argument
230 	struct ksz_device *dev = ds->priv;  in ksz_port_get_dscp_prio()
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()
266  * ksz_set_global_dscp_entry - Sets the global DSCP-to-priority mapping entry
271  * This function sets the global DSCP-to-priority mapping entry for the
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
331 			ipm = ieee8021q_tt_to_tc(tt, dev->info->num_tx_queues);  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
353 int ksz_port_add_dscp_prio(struct dsa_switch *ds, int port, u8 dscp, u8 prio)  in ksz_port_add_dscp_prio()  argument
355 	struct ksz_device *dev = ds->priv;  in ksz_port_add_dscp_prio()
357 	if (prio >= dev->info->num_ipms)  in ksz_port_add_dscp_prio()
358 		return -ERANGE;  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
373 int ksz_port_del_dscp_prio(struct dsa_switch *ds, int port, u8 dscp, u8 prio)  in ksz_port_del_dscp_prio()  argument
375 	struct ksz_device *dev = ds->priv;  in ksz_port_del_dscp_prio()
378 	if (ksz_port_get_dscp_prio(ds, port, dscp) != prio)  in ksz_port_del_dscp_prio()
383 					 dev->info->num_tx_queues);  in ksz_port_del_dscp_prio()
394  * ksz_apptrust_error - Prints an error message for an invalid apptrust selector
415 	dev_err(dev->dev, "Invalid apptrust selector or priority order. Supported: %s\n",  in ksz_apptrust_error()
420  * ksz_port_set_apptrust_validate - Validates the apptrust selectors
422  * @port: Port number for which to set the apptrust selectors
424  * @nsel: Number of apptrust selectors in the array
432  * 1. DCB_APP_SEL_PCP - Priority Code Point selector (highest priority)
433  * 2. IEEE_8021QAZ_APP_SEL_DSCP - Differentiated Services Code Point selector
438 static int ksz_port_set_apptrust_validate(struct ksz_device *dev, int port,  in ksz_port_set_apptrust_validate()  argument
474 	return -EINVAL;  in ksz_port_set_apptrust_validate()
478  * ksz_port_set_apptrust - Sets the apptrust selectors for a port on a KSZ
481  * @port: Port number for which to set the apptrust selectors
483  * @nsel: Number of apptrust selectors in the array
485  * This function sets the apptrust selectors for the specified port on a KSZ
490 int ksz_port_set_apptrust(struct dsa_switch *ds, int port,  in ksz_port_set_apptrust()  argument
494 	struct ksz_device *dev = ds->priv;  in ksz_port_set_apptrust()
499 	ret = ksz_port_set_apptrust_validate(dev, port, sel, nsel);  in ksz_port_set_apptrust()
517 	return ksz_prmw8(dev, port, reg, mask, data);  in ksz_port_set_apptrust()
521  * ksz_port_get_apptrust - Retrieves the apptrust selectors for a port on a KSZ
524  * @port: Port number for which to get the apptrust selectors
526  * @nsel: Number of apptrust selectors in the array
528  * This function fetches the apptrust selectors for the specified port on a KSZ
533 int ksz_port_get_apptrust(struct dsa_switch *ds, int port, u8 *sel, int *nsel)  in ksz_port_get_apptrust()  argument
536 	struct ksz_device *dev = ds->priv;  in ksz_port_get_apptrust()
543 	ret = ksz_pread8(dev, port, reg, &data);  in ksz_port_get_apptrust()
557  * ksz_dcb_init_port - Initializes the DCB configuration for a port on a KSZ
559  * @port: Port number for which to initialize the DCB configuration
561  * This function initializes the DCB configuration for the specified port on a
562  * KSZ switch. Particular DCB configuration is set for the port, including the
569 int ksz_dcb_init_port(struct ksz_device *dev, int port)  in ksz_dcb_init_port()  argument
576 					 dev->info->num_tx_queues);  in ksz_dcb_init_port()
583 	/* Set the default priority for the port to Best Effort */  in ksz_dcb_init_port()
584 	ret = ksz_port_set_default_prio(dev->ds, port, ipm);  in ksz_dcb_init_port()
588 	return ksz_port_set_apptrust(dev->ds, port, ksz_default_apptrust,  in ksz_dcb_init_port()
593  * ksz_dcb_init - Initializes the DCB configuration for a KSZ switch
597  * DSCP-to-priority mapping table is initialized.