diff --git a/drivers/net/dsa/sja1105/sja1105.h b/drivers/net/dsa/sja1105/sja1105.h index d043332cbc02..4af70f619d8e 100644 --- a/drivers/net/dsa/sja1105/sja1105.h +++ b/drivers/net/dsa/sja1105/sja1105.h @@ -218,6 +218,7 @@ struct sja1105_private { struct mutex mgmt_lock; struct dsa_8021q_context *dsa_8021q_ctx; enum sja1105_vlan_state vlan_state; + struct devlink_region **regions; struct sja1105_cbs_entry *cbs; struct sja1105_tagger_data tagger_data; struct sja1105_ptp_data ptp_data; @@ -265,6 +266,8 @@ int sja1105_xfer_u32(const struct sja1105_private *priv, int sja1105_xfer_u64(const struct sja1105_private *priv, sja1105_spi_rw_mode_t rw, u64 reg_addr, u64 *value, struct ptp_system_timestamp *ptp_sts); +int static_config_buf_prepare_for_upload(struct sja1105_private *priv, + void *config_buf, int buf_len); int sja1105_static_config_upload(struct sja1105_private *priv); int sja1105_inhibit_tx(const struct sja1105_private *priv, unsigned long port_bitmap, bool tx_inhibited); diff --git a/drivers/net/dsa/sja1105/sja1105_devlink.c b/drivers/net/dsa/sja1105/sja1105_devlink.c index 03454638c5a8..07ae6913d188 100644 --- a/drivers/net/dsa/sja1105/sja1105_devlink.c +++ b/drivers/net/dsa/sja1105/sja1105_devlink.c @@ -1,8 +1,120 @@ // SPDX-License-Identifier: GPL-2.0 /* Copyright (c) 2018-2019, Vladimir Oltean + * Copyright 2020 NXP Semiconductors */ #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]); + 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); +} + static int sja1105_best_effort_vlan_filtering_get(struct sja1105_private *priv, bool *be_vlan) { @@ -110,10 +222,17 @@ int sja1105_devlink_setup(struct dsa_switch *ds) if (rc) return rc; + rc = sja1105_setup_devlink_regions(ds); + if (rc < 0) { + sja1105_teardown_devlink_params(ds); + return rc; + } + return 0; } void sja1105_devlink_teardown(struct dsa_switch *ds) { sja1105_teardown_devlink_params(ds); + sja1105_teardown_devlink_regions(ds); } diff --git a/drivers/net/dsa/sja1105/sja1105_spi.c b/drivers/net/dsa/sja1105/sja1105_spi.c index 704dcf1d1c01..591c5734747d 100644 --- a/drivers/net/dsa/sja1105/sja1105_spi.c +++ b/drivers/net/dsa/sja1105/sja1105_spi.c @@ -302,9 +302,8 @@ static int sja1105_status_get(struct sja1105_private *priv, * for upload requires the recalculation of table CRCs and updating the * structures with these. */ -static int -static_config_buf_prepare_for_upload(struct sja1105_private *priv, - void *config_buf, int buf_len) +int static_config_buf_prepare_for_upload(struct sja1105_private *priv, + void *config_buf, int buf_len) { struct sja1105_static_config *config = &priv->static_config; struct sja1105_table_header final_header;