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net: microchip: sparx5: add support for offloading pcp table
Add new registers and functions to support offload of pcp app entries. Signed-off-by: Daniel Machon <daniel.machon@microchip.com> Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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Daniel Machon
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Paolo Abeni
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Nov 3, 2022
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,116 @@ | ||
| // SPDX-License-Identifier: GPL-2.0+ | ||
| /* Microchip Sparx5 Switch driver | ||
| * | ||
| * Copyright (c) 2022 Microchip Technology Inc. and its subsidiaries. | ||
| */ | ||
|
|
||
| #include <net/dcbnl.h> | ||
|
|
||
| #include "sparx5_port.h" | ||
|
|
||
| /* Validate app entry. | ||
| * | ||
| * Check for valid selectors and valid protocol and priority ranges. | ||
| */ | ||
| static int sparx5_dcb_app_validate(struct net_device *dev, | ||
| const struct dcb_app *app) | ||
| { | ||
| int err = 0; | ||
|
|
||
| switch (app->selector) { | ||
| /* Pcp checks */ | ||
| case DCB_APP_SEL_PCP: | ||
| if (app->protocol >= SPARX5_PORT_QOS_PCP_DEI_COUNT) | ||
| err = -EINVAL; | ||
| else if (app->priority >= SPX5_PRIOS) | ||
| err = -ERANGE; | ||
| break; | ||
| default: | ||
| err = -EINVAL; | ||
| break; | ||
| } | ||
|
|
||
| if (err) | ||
| netdev_err(dev, "Invalid entry: %d:%d\n", app->protocol, | ||
| app->priority); | ||
|
|
||
| return err; | ||
| } | ||
|
|
||
| static int sparx5_dcb_app_update(struct net_device *dev) | ||
| { | ||
| struct dcb_app app_itr = { .selector = DCB_APP_SEL_PCP }; | ||
| struct sparx5_port *port = netdev_priv(dev); | ||
| struct sparx5_port_qos_pcp_map *pcp_map; | ||
| struct sparx5_port_qos qos = {0}; | ||
| int i; | ||
|
|
||
| pcp_map = &qos.pcp.map; | ||
|
|
||
| /* Get pcp ingress mapping */ | ||
| for (i = 0; i < ARRAY_SIZE(pcp_map->map); i++) { | ||
| app_itr.protocol = i; | ||
| pcp_map->map[i] = dcb_getapp(dev, &app_itr); | ||
| } | ||
|
|
||
| return sparx5_port_qos_set(port, &qos); | ||
| } | ||
|
|
||
| static int sparx5_dcb_ieee_setapp(struct net_device *dev, struct dcb_app *app) | ||
| { | ||
| struct dcb_app app_itr; | ||
| int err = 0; | ||
| u8 prio; | ||
|
|
||
| err = sparx5_dcb_app_validate(dev, app); | ||
| if (err) | ||
| goto out; | ||
|
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| /* Delete current mapping, if it exists */ | ||
| prio = dcb_getapp(dev, app); | ||
| if (prio) { | ||
| app_itr = *app; | ||
| app_itr.priority = prio; | ||
| dcb_ieee_delapp(dev, &app_itr); | ||
| } | ||
|
|
||
| err = dcb_ieee_setapp(dev, app); | ||
| if (err) | ||
| goto out; | ||
|
|
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| sparx5_dcb_app_update(dev); | ||
|
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| out: | ||
| return err; | ||
| } | ||
|
|
||
| static int sparx5_dcb_ieee_delapp(struct net_device *dev, struct dcb_app *app) | ||
| { | ||
| int err; | ||
|
|
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| err = dcb_ieee_delapp(dev, app); | ||
| if (err < 0) | ||
| return err; | ||
|
|
||
| return sparx5_dcb_app_update(dev); | ||
| } | ||
|
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||
| const struct dcbnl_rtnl_ops sparx5_dcbnl_ops = { | ||
| .ieee_setapp = sparx5_dcb_ieee_setapp, | ||
| .ieee_delapp = sparx5_dcb_ieee_delapp, | ||
| }; | ||
|
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||
| int sparx5_dcb_init(struct sparx5 *sparx5) | ||
| { | ||
| struct sparx5_port *port; | ||
| int i; | ||
|
|
||
| for (i = 0; i < SPX5_PORTS; i++) { | ||
| port = sparx5->ports[i]; | ||
| if (!port) | ||
| continue; | ||
| port->ndev->dcbnl_ops = &sparx5_dcbnl_ops; | ||
| } | ||
|
|
||
| return 0; | ||
| } |
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