140 lines
3.6 KiB
C
140 lines
3.6 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright (c) 2018-2019, Vladimir Oltean <olteanv@gmail.com>
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* Copyright 2020 NXP
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*/
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#include "sja1105.h"
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/* Since devlink regions have a fixed size and the static config has a variable
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* size, we need to calculate the maximum possible static config size by
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* creating a dummy config with all table entries populated to the max, and get
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* its packed length. This is done dynamically as opposed to simply hardcoding
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* a number, since currently not all static config tables are implemented, so
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* we are avoiding a possible code desynchronization.
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*/
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static size_t sja1105_static_config_get_max_size(struct sja1105_private *priv)
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{
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struct sja1105_static_config config;
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enum sja1105_blk_idx blk_idx;
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int rc;
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rc = sja1105_static_config_init(&config,
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priv->info->static_ops,
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priv->info->device_id);
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if (rc)
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return 0;
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for (blk_idx = 0; blk_idx < BLK_IDX_MAX; blk_idx++) {
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struct sja1105_table *table = &config.tables[blk_idx];
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table->entry_count = table->ops->max_entry_count;
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}
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return sja1105_static_config_get_length(&config);
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}
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static int
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sja1105_region_static_config_snapshot(struct devlink *dl,
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const struct devlink_region_ops *ops,
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struct netlink_ext_ack *extack,
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u8 **data)
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{
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struct dsa_switch *ds = dsa_devlink_to_ds(dl);
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struct sja1105_private *priv = ds->priv;
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size_t max_len, len;
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len = sja1105_static_config_get_length(&priv->static_config);
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max_len = sja1105_static_config_get_max_size(priv);
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*data = kcalloc(max_len, sizeof(u8), GFP_KERNEL);
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if (!*data)
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return -ENOMEM;
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return static_config_buf_prepare_for_upload(priv, *data, len);
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}
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static struct devlink_region_ops sja1105_region_static_config_ops = {
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.name = "static-config",
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.snapshot = sja1105_region_static_config_snapshot,
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.destructor = kfree,
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};
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enum sja1105_region_id {
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SJA1105_REGION_STATIC_CONFIG = 0,
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};
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struct sja1105_region {
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const struct devlink_region_ops *ops;
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size_t (*get_size)(struct sja1105_private *priv);
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};
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static struct sja1105_region sja1105_regions[] = {
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[SJA1105_REGION_STATIC_CONFIG] = {
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.ops = &sja1105_region_static_config_ops,
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.get_size = sja1105_static_config_get_max_size,
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},
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};
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static int sja1105_setup_devlink_regions(struct dsa_switch *ds)
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{
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int i, num_regions = ARRAY_SIZE(sja1105_regions);
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struct sja1105_private *priv = ds->priv;
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const struct devlink_region_ops *ops;
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struct devlink_region *region;
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u64 size;
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priv->regions = kcalloc(num_regions, sizeof(struct devlink_region *),
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GFP_KERNEL);
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if (!priv->regions)
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return -ENOMEM;
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for (i = 0; i < num_regions; i++) {
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size = sja1105_regions[i].get_size(priv);
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ops = sja1105_regions[i].ops;
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region = dsa_devlink_region_create(ds, ops, 1, size);
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if (IS_ERR(region)) {
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while (--i >= 0)
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dsa_devlink_region_destroy(priv->regions[i]);
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kfree(priv->regions);
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return PTR_ERR(region);
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}
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priv->regions[i] = region;
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}
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return 0;
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}
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static void sja1105_teardown_devlink_regions(struct dsa_switch *ds)
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{
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int i, num_regions = ARRAY_SIZE(sja1105_regions);
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struct sja1105_private *priv = ds->priv;
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for (i = 0; i < num_regions; i++)
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dsa_devlink_region_destroy(priv->regions[i]);
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kfree(priv->regions);
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}
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int sja1105_devlink_info_get(struct dsa_switch *ds,
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struct devlink_info_req *req,
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struct netlink_ext_ack *extack)
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{
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struct sja1105_private *priv = ds->priv;
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return devlink_info_version_fixed_put(req,
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DEVLINK_INFO_VERSION_GENERIC_ASIC_ID,
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priv->info->name);
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}
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int sja1105_devlink_setup(struct dsa_switch *ds)
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{
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return sja1105_setup_devlink_regions(ds);
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}
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void sja1105_devlink_teardown(struct dsa_switch *ds)
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{
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sja1105_teardown_devlink_regions(ds);
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}
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