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