diff options
Diffstat (limited to 'drivers/net/ethernet/mellanox/mlxsw/spectrum_acl_erp.c')
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlxsw/spectrum_acl_erp.c | 1601 |
1 files changed, 1601 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_acl_erp.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_acl_erp.c new file mode 100644 index 000000000..d231f4d28 --- /dev/null +++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_acl_erp.c @@ -0,0 +1,1601 @@ +// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 +/* Copyright (c) 2018 Mellanox Technologies. All rights reserved */ + +#include <linux/bitmap.h> +#include <linux/errno.h> +#include <linux/genalloc.h> +#include <linux/gfp.h> +#include <linux/kernel.h> +#include <linux/list.h> +#include <linux/mutex.h> +#include <linux/objagg.h> +#include <linux/rtnetlink.h> +#include <linux/slab.h> + +#include "core.h" +#include "reg.h" +#include "spectrum.h" +#include "spectrum_acl_tcam.h" + +/* gen_pool_alloc() returns 0 when allocation fails, so use an offset */ +#define MLXSW_SP_ACL_ERP_GENALLOC_OFFSET 0x100 +#define MLXSW_SP_ACL_ERP_MAX_PER_REGION 16 + +struct mlxsw_sp_acl_erp_core { + unsigned int erpt_entries_size[MLXSW_SP_ACL_ATCAM_REGION_TYPE_MAX + 1]; + struct gen_pool *erp_tables; + struct mlxsw_sp *mlxsw_sp; + struct mlxsw_sp_acl_bf *bf; + unsigned int num_erp_banks; +}; + +struct mlxsw_sp_acl_erp_key { + char mask[MLXSW_REG_PTCEX_FLEX_KEY_BLOCKS_LEN]; +#define __MASK_LEN 0x38 +#define __MASK_IDX(i) (__MASK_LEN - (i) - 1) + bool ctcam; +}; + +struct mlxsw_sp_acl_erp { + struct mlxsw_sp_acl_erp_key key; + u8 id; + u8 index; + DECLARE_BITMAP(mask_bitmap, MLXSW_SP_ACL_TCAM_MASK_LEN); + struct list_head list; + struct mlxsw_sp_acl_erp_table *erp_table; +}; + +struct mlxsw_sp_acl_erp_master_mask { + DECLARE_BITMAP(bitmap, MLXSW_SP_ACL_TCAM_MASK_LEN); + unsigned int count[MLXSW_SP_ACL_TCAM_MASK_LEN]; +}; + +struct mlxsw_sp_acl_erp_table { + struct mlxsw_sp_acl_erp_master_mask master_mask; + DECLARE_BITMAP(erp_id_bitmap, MLXSW_SP_ACL_ERP_MAX_PER_REGION); + DECLARE_BITMAP(erp_index_bitmap, MLXSW_SP_ACL_ERP_MAX_PER_REGION); + struct list_head atcam_erps_list; + struct mlxsw_sp_acl_erp_core *erp_core; + struct mlxsw_sp_acl_atcam_region *aregion; + const struct mlxsw_sp_acl_erp_table_ops *ops; + unsigned long base_index; + unsigned int num_atcam_erps; + unsigned int num_max_atcam_erps; + unsigned int num_ctcam_erps; + unsigned int num_deltas; + struct objagg *objagg; + struct mutex objagg_lock; /* guards objagg manipulation */ +}; + +struct mlxsw_sp_acl_erp_table_ops { + struct mlxsw_sp_acl_erp * + (*erp_create)(struct mlxsw_sp_acl_erp_table *erp_table, + struct mlxsw_sp_acl_erp_key *key); + void (*erp_destroy)(struct mlxsw_sp_acl_erp_table *erp_table, + struct mlxsw_sp_acl_erp *erp); +}; + +static struct mlxsw_sp_acl_erp * +mlxsw_sp_acl_erp_mask_create(struct mlxsw_sp_acl_erp_table *erp_table, + struct mlxsw_sp_acl_erp_key *key); +static void +mlxsw_sp_acl_erp_mask_destroy(struct mlxsw_sp_acl_erp_table *erp_table, + struct mlxsw_sp_acl_erp *erp); +static struct mlxsw_sp_acl_erp * +mlxsw_sp_acl_erp_second_mask_create(struct mlxsw_sp_acl_erp_table *erp_table, + struct mlxsw_sp_acl_erp_key *key); +static void +mlxsw_sp_acl_erp_second_mask_destroy(struct mlxsw_sp_acl_erp_table *erp_table, + struct mlxsw_sp_acl_erp *erp); +static struct mlxsw_sp_acl_erp * +mlxsw_sp_acl_erp_first_mask_create(struct mlxsw_sp_acl_erp_table *erp_table, + struct mlxsw_sp_acl_erp_key *key); +static void +mlxsw_sp_acl_erp_first_mask_destroy(struct mlxsw_sp_acl_erp_table *erp_table, + struct mlxsw_sp_acl_erp *erp); +static void +mlxsw_sp_acl_erp_no_mask_destroy(struct mlxsw_sp_acl_erp_table *erp_table, + struct mlxsw_sp_acl_erp *erp); + +static const struct mlxsw_sp_acl_erp_table_ops erp_multiple_masks_ops = { + .erp_create = mlxsw_sp_acl_erp_mask_create, + .erp_destroy = mlxsw_sp_acl_erp_mask_destroy, +}; + +static const struct mlxsw_sp_acl_erp_table_ops erp_two_masks_ops = { + .erp_create = mlxsw_sp_acl_erp_mask_create, + .erp_destroy = mlxsw_sp_acl_erp_second_mask_destroy, +}; + +static const struct mlxsw_sp_acl_erp_table_ops erp_single_mask_ops = { + .erp_create = mlxsw_sp_acl_erp_second_mask_create, + .erp_destroy = mlxsw_sp_acl_erp_first_mask_destroy, +}; + +static const struct mlxsw_sp_acl_erp_table_ops erp_no_mask_ops = { + .erp_create = mlxsw_sp_acl_erp_first_mask_create, + .erp_destroy = mlxsw_sp_acl_erp_no_mask_destroy, +}; + +static bool +mlxsw_sp_acl_erp_table_is_used(const struct mlxsw_sp_acl_erp_table *erp_table) +{ + return erp_table->ops != &erp_single_mask_ops && + erp_table->ops != &erp_no_mask_ops; +} + +static unsigned int +mlxsw_sp_acl_erp_bank_get(const struct mlxsw_sp_acl_erp *erp) +{ + return erp->index % erp->erp_table->erp_core->num_erp_banks; +} + +static unsigned int +mlxsw_sp_acl_erp_table_entry_size(const struct mlxsw_sp_acl_erp_table *erp_table) +{ + struct mlxsw_sp_acl_atcam_region *aregion = erp_table->aregion; + struct mlxsw_sp_acl_erp_core *erp_core = erp_table->erp_core; + + return erp_core->erpt_entries_size[aregion->type]; +} + +static int mlxsw_sp_acl_erp_id_get(struct mlxsw_sp_acl_erp_table *erp_table, + u8 *p_id) +{ + u8 id; + + id = find_first_zero_bit(erp_table->erp_id_bitmap, + MLXSW_SP_ACL_ERP_MAX_PER_REGION); + if (id < MLXSW_SP_ACL_ERP_MAX_PER_REGION) { + __set_bit(id, erp_table->erp_id_bitmap); + *p_id = id; + return 0; + } + + return -ENOBUFS; +} + +static void mlxsw_sp_acl_erp_id_put(struct mlxsw_sp_acl_erp_table *erp_table, + u8 id) +{ + __clear_bit(id, erp_table->erp_id_bitmap); +} + +static void +mlxsw_sp_acl_erp_master_mask_bit_set(unsigned long bit, + struct mlxsw_sp_acl_erp_master_mask *mask) +{ + if (mask->count[bit]++ == 0) + __set_bit(bit, mask->bitmap); +} + +static void +mlxsw_sp_acl_erp_master_mask_bit_clear(unsigned long bit, + struct mlxsw_sp_acl_erp_master_mask *mask) +{ + if (--mask->count[bit] == 0) + __clear_bit(bit, mask->bitmap); +} + +static int +mlxsw_sp_acl_erp_master_mask_update(struct mlxsw_sp_acl_erp_table *erp_table) +{ + struct mlxsw_sp_acl_tcam_region *region = erp_table->aregion->region; + struct mlxsw_sp *mlxsw_sp = region->mlxsw_sp; + char percr_pl[MLXSW_REG_PERCR_LEN]; + char *master_mask; + + mlxsw_reg_percr_pack(percr_pl, region->id); + master_mask = mlxsw_reg_percr_master_mask_data(percr_pl); + bitmap_to_arr32((u32 *) master_mask, erp_table->master_mask.bitmap, + MLXSW_SP_ACL_TCAM_MASK_LEN); + + return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(percr), percr_pl); +} + +static int +mlxsw_sp_acl_erp_master_mask_set(struct mlxsw_sp_acl_erp_table *erp_table, + struct mlxsw_sp_acl_erp_key *key) +{ + DECLARE_BITMAP(mask_bitmap, MLXSW_SP_ACL_TCAM_MASK_LEN); + unsigned long bit; + int err; + + bitmap_from_arr32(mask_bitmap, (u32 *) key->mask, + MLXSW_SP_ACL_TCAM_MASK_LEN); + for_each_set_bit(bit, mask_bitmap, MLXSW_SP_ACL_TCAM_MASK_LEN) + mlxsw_sp_acl_erp_master_mask_bit_set(bit, + &erp_table->master_mask); + + err = mlxsw_sp_acl_erp_master_mask_update(erp_table); + if (err) + goto err_master_mask_update; + + return 0; + +err_master_mask_update: + for_each_set_bit(bit, mask_bitmap, MLXSW_SP_ACL_TCAM_MASK_LEN) + mlxsw_sp_acl_erp_master_mask_bit_clear(bit, + &erp_table->master_mask); + return err; +} + +static int +mlxsw_sp_acl_erp_master_mask_clear(struct mlxsw_sp_acl_erp_table *erp_table, + struct mlxsw_sp_acl_erp_key *key) +{ + DECLARE_BITMAP(mask_bitmap, MLXSW_SP_ACL_TCAM_MASK_LEN); + unsigned long bit; + int err; + + bitmap_from_arr32(mask_bitmap, (u32 *) key->mask, + MLXSW_SP_ACL_TCAM_MASK_LEN); + for_each_set_bit(bit, mask_bitmap, MLXSW_SP_ACL_TCAM_MASK_LEN) + mlxsw_sp_acl_erp_master_mask_bit_clear(bit, + &erp_table->master_mask); + + err = mlxsw_sp_acl_erp_master_mask_update(erp_table); + if (err) + goto err_master_mask_update; + + return 0; + +err_master_mask_update: + for_each_set_bit(bit, mask_bitmap, MLXSW_SP_ACL_TCAM_MASK_LEN) + mlxsw_sp_acl_erp_master_mask_bit_set(bit, + &erp_table->master_mask); + return err; +} + +static struct mlxsw_sp_acl_erp * +mlxsw_sp_acl_erp_generic_create(struct mlxsw_sp_acl_erp_table *erp_table, + struct mlxsw_sp_acl_erp_key *key) +{ + struct mlxsw_sp_acl_erp *erp; + int err; + + erp = kzalloc(sizeof(*erp), GFP_KERNEL); + if (!erp) + return ERR_PTR(-ENOMEM); + + err = mlxsw_sp_acl_erp_id_get(erp_table, &erp->id); + if (err) + goto err_erp_id_get; + + memcpy(&erp->key, key, sizeof(*key)); + list_add(&erp->list, &erp_table->atcam_erps_list); + erp_table->num_atcam_erps++; + erp->erp_table = erp_table; + + err = mlxsw_sp_acl_erp_master_mask_set(erp_table, &erp->key); + if (err) + goto err_master_mask_set; + + return erp; + +err_master_mask_set: + erp_table->num_atcam_erps--; + list_del(&erp->list); + mlxsw_sp_acl_erp_id_put(erp_table, erp->id); +err_erp_id_get: + kfree(erp); + return ERR_PTR(err); +} + +static void +mlxsw_sp_acl_erp_generic_destroy(struct mlxsw_sp_acl_erp *erp) +{ + struct mlxsw_sp_acl_erp_table *erp_table = erp->erp_table; + + mlxsw_sp_acl_erp_master_mask_clear(erp_table, &erp->key); + erp_table->num_atcam_erps--; + list_del(&erp->list); + mlxsw_sp_acl_erp_id_put(erp_table, erp->id); + kfree(erp); +} + +static int +mlxsw_sp_acl_erp_table_alloc(struct mlxsw_sp_acl_erp_core *erp_core, + unsigned int num_erps, + enum mlxsw_sp_acl_atcam_region_type region_type, + unsigned long *p_index) +{ + unsigned int num_rows, entry_size; + unsigned long index; + + /* We only allow allocations of entire rows */ + if (num_erps % erp_core->num_erp_banks != 0) + return -EINVAL; + + entry_size = erp_core->erpt_entries_size[region_type]; + num_rows = num_erps / erp_core->num_erp_banks; + + index = gen_pool_alloc(erp_core->erp_tables, num_rows * entry_size); + if (!index) + return -ENOBUFS; + + *p_index = index - MLXSW_SP_ACL_ERP_GENALLOC_OFFSET; + + return 0; +} + +static void +mlxsw_sp_acl_erp_table_free(struct mlxsw_sp_acl_erp_core *erp_core, + unsigned int num_erps, + enum mlxsw_sp_acl_atcam_region_type region_type, + unsigned long index) +{ + unsigned long base_index; + unsigned int entry_size; + size_t size; + + entry_size = erp_core->erpt_entries_size[region_type]; + base_index = index + MLXSW_SP_ACL_ERP_GENALLOC_OFFSET; + size = num_erps / erp_core->num_erp_banks * entry_size; + gen_pool_free(erp_core->erp_tables, base_index, size); +} + +static struct mlxsw_sp_acl_erp * +mlxsw_sp_acl_erp_table_master_rp(struct mlxsw_sp_acl_erp_table *erp_table) +{ + if (!list_is_singular(&erp_table->atcam_erps_list)) + return NULL; + + return list_first_entry(&erp_table->atcam_erps_list, + struct mlxsw_sp_acl_erp, list); +} + +static int mlxsw_sp_acl_erp_index_get(struct mlxsw_sp_acl_erp_table *erp_table, + u8 *p_index) +{ + u8 index; + + index = find_first_zero_bit(erp_table->erp_index_bitmap, + erp_table->num_max_atcam_erps); + if (index < erp_table->num_max_atcam_erps) { + __set_bit(index, erp_table->erp_index_bitmap); + *p_index = index; + return 0; + } + + return -ENOBUFS; +} + +static void mlxsw_sp_acl_erp_index_put(struct mlxsw_sp_acl_erp_table *erp_table, + u8 index) +{ + __clear_bit(index, erp_table->erp_index_bitmap); +} + +static void +mlxsw_sp_acl_erp_table_locate(const struct mlxsw_sp_acl_erp_table *erp_table, + const struct mlxsw_sp_acl_erp *erp, + u8 *p_erpt_bank, u8 *p_erpt_index) +{ + unsigned int entry_size = mlxsw_sp_acl_erp_table_entry_size(erp_table); + struct mlxsw_sp_acl_erp_core *erp_core = erp_table->erp_core; + unsigned int row; + + *p_erpt_bank = erp->index % erp_core->num_erp_banks; + row = erp->index / erp_core->num_erp_banks; + *p_erpt_index = erp_table->base_index + row * entry_size; +} + +static int +mlxsw_sp_acl_erp_table_erp_add(struct mlxsw_sp_acl_erp_table *erp_table, + struct mlxsw_sp_acl_erp *erp) +{ + struct mlxsw_sp *mlxsw_sp = erp_table->erp_core->mlxsw_sp; + enum mlxsw_reg_perpt_key_size key_size; + char perpt_pl[MLXSW_REG_PERPT_LEN]; + u8 erpt_bank, erpt_index; + + mlxsw_sp_acl_erp_table_locate(erp_table, erp, &erpt_bank, &erpt_index); + key_size = (enum mlxsw_reg_perpt_key_size) erp_table->aregion->type; + mlxsw_reg_perpt_pack(perpt_pl, erpt_bank, erpt_index, key_size, erp->id, + 0, erp_table->base_index, erp->index, + erp->key.mask); + mlxsw_reg_perpt_erp_vector_pack(perpt_pl, erp_table->erp_index_bitmap, + MLXSW_SP_ACL_ERP_MAX_PER_REGION); + mlxsw_reg_perpt_erp_vector_set(perpt_pl, erp->index, true); + return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(perpt), perpt_pl); +} + +static void mlxsw_sp_acl_erp_table_erp_del(struct mlxsw_sp_acl_erp *erp) +{ + char empty_mask[MLXSW_REG_PTCEX_FLEX_KEY_BLOCKS_LEN] = { 0 }; + struct mlxsw_sp_acl_erp_table *erp_table = erp->erp_table; + struct mlxsw_sp *mlxsw_sp = erp_table->erp_core->mlxsw_sp; + enum mlxsw_reg_perpt_key_size key_size; + char perpt_pl[MLXSW_REG_PERPT_LEN]; + u8 erpt_bank, erpt_index; + + mlxsw_sp_acl_erp_table_locate(erp_table, erp, &erpt_bank, &erpt_index); + key_size = (enum mlxsw_reg_perpt_key_size) erp_table->aregion->type; + mlxsw_reg_perpt_pack(perpt_pl, erpt_bank, erpt_index, key_size, erp->id, + 0, erp_table->base_index, erp->index, empty_mask); + mlxsw_reg_perpt_erp_vector_pack(perpt_pl, erp_table->erp_index_bitmap, + MLXSW_SP_ACL_ERP_MAX_PER_REGION); + mlxsw_reg_perpt_erp_vector_set(perpt_pl, erp->index, false); + mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(perpt), perpt_pl); +} + +static int +mlxsw_sp_acl_erp_table_enable(struct mlxsw_sp_acl_erp_table *erp_table, + bool ctcam_le) +{ + struct mlxsw_sp_acl_tcam_region *region = erp_table->aregion->region; + struct mlxsw_sp *mlxsw_sp = erp_table->erp_core->mlxsw_sp; + char pererp_pl[MLXSW_REG_PERERP_LEN]; + + mlxsw_reg_pererp_pack(pererp_pl, region->id, ctcam_le, true, 0, + erp_table->base_index, 0); + mlxsw_reg_pererp_erp_vector_pack(pererp_pl, erp_table->erp_index_bitmap, + MLXSW_SP_ACL_ERP_MAX_PER_REGION); + + return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(pererp), pererp_pl); +} + +static void +mlxsw_sp_acl_erp_table_disable(struct mlxsw_sp_acl_erp_table *erp_table) +{ + struct mlxsw_sp_acl_tcam_region *region = erp_table->aregion->region; + struct mlxsw_sp *mlxsw_sp = erp_table->erp_core->mlxsw_sp; + char pererp_pl[MLXSW_REG_PERERP_LEN]; + struct mlxsw_sp_acl_erp *master_rp; + + master_rp = mlxsw_sp_acl_erp_table_master_rp(erp_table); + /* It is possible we do not have a master RP when we disable the + * table when there are no rules in the A-TCAM and the last C-TCAM + * rule is deleted + */ + mlxsw_reg_pererp_pack(pererp_pl, region->id, false, false, 0, 0, + master_rp ? master_rp->id : 0); + mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(pererp), pererp_pl); +} + +static int +mlxsw_sp_acl_erp_table_relocate(struct mlxsw_sp_acl_erp_table *erp_table) +{ + struct mlxsw_sp_acl_erp *erp; + int err; + + list_for_each_entry(erp, &erp_table->atcam_erps_list, list) { + err = mlxsw_sp_acl_erp_table_erp_add(erp_table, erp); + if (err) + goto err_table_erp_add; + } + + return 0; + +err_table_erp_add: + list_for_each_entry_continue_reverse(erp, &erp_table->atcam_erps_list, + list) + mlxsw_sp_acl_erp_table_erp_del(erp); + return err; +} + +static int +mlxsw_sp_acl_erp_table_expand(struct mlxsw_sp_acl_erp_table *erp_table) +{ + unsigned int num_erps, old_num_erps = erp_table->num_max_atcam_erps; + struct mlxsw_sp_acl_erp_core *erp_core = erp_table->erp_core; + unsigned long old_base_index = erp_table->base_index; + bool ctcam_le = erp_table->num_ctcam_erps > 0; + int err; + + if (erp_table->num_atcam_erps < erp_table->num_max_atcam_erps) + return 0; + + if (erp_table->num_max_atcam_erps == MLXSW_SP_ACL_ERP_MAX_PER_REGION) + return -ENOBUFS; + + num_erps = old_num_erps + erp_core->num_erp_banks; + err = mlxsw_sp_acl_erp_table_alloc(erp_core, num_erps, + erp_table->aregion->type, + &erp_table->base_index); + if (err) + return err; + erp_table->num_max_atcam_erps = num_erps; + + err = mlxsw_sp_acl_erp_table_relocate(erp_table); + if (err) + goto err_table_relocate; + + err = mlxsw_sp_acl_erp_table_enable(erp_table, ctcam_le); + if (err) + goto err_table_enable; + + mlxsw_sp_acl_erp_table_free(erp_core, old_num_erps, + erp_table->aregion->type, old_base_index); + + return 0; + +err_table_enable: +err_table_relocate: + erp_table->num_max_atcam_erps = old_num_erps; + mlxsw_sp_acl_erp_table_free(erp_core, num_erps, + erp_table->aregion->type, + erp_table->base_index); + erp_table->base_index = old_base_index; + return err; +} + +static int +mlxsw_acl_erp_table_bf_add(struct mlxsw_sp_acl_erp_table *erp_table, + struct mlxsw_sp_acl_erp *erp) +{ + struct mlxsw_sp_acl_atcam_region *aregion = erp_table->aregion; + unsigned int erp_bank = mlxsw_sp_acl_erp_bank_get(erp); + struct mlxsw_sp_acl_atcam_entry *aentry; + int err; + + list_for_each_entry(aentry, &aregion->entries_list, list) { + err = mlxsw_sp_acl_bf_entry_add(aregion->region->mlxsw_sp, + erp_table->erp_core->bf, + aregion, erp_bank, aentry); + if (err) + goto bf_entry_add_err; + } + + return 0; + +bf_entry_add_err: + list_for_each_entry_continue_reverse(aentry, &aregion->entries_list, + list) + mlxsw_sp_acl_bf_entry_del(aregion->region->mlxsw_sp, + erp_table->erp_core->bf, + aregion, erp_bank, aentry); + return err; +} + +static void +mlxsw_acl_erp_table_bf_del(struct mlxsw_sp_acl_erp_table *erp_table, + struct mlxsw_sp_acl_erp *erp) +{ + struct mlxsw_sp_acl_atcam_region *aregion = erp_table->aregion; + unsigned int erp_bank = mlxsw_sp_acl_erp_bank_get(erp); + struct mlxsw_sp_acl_atcam_entry *aentry; + + list_for_each_entry_reverse(aentry, &aregion->entries_list, list) + mlxsw_sp_acl_bf_entry_del(aregion->region->mlxsw_sp, + erp_table->erp_core->bf, + aregion, erp_bank, aentry); +} + +static int +mlxsw_sp_acl_erp_region_table_trans(struct mlxsw_sp_acl_erp_table *erp_table) +{ + struct mlxsw_sp_acl_erp_core *erp_core = erp_table->erp_core; + struct mlxsw_sp_acl_erp *master_rp; + int err; + + /* Initially, allocate a single eRP row. Expand later as needed */ + err = mlxsw_sp_acl_erp_table_alloc(erp_core, erp_core->num_erp_banks, + erp_table->aregion->type, + &erp_table->base_index); + if (err) + return err; + erp_table->num_max_atcam_erps = erp_core->num_erp_banks; + + /* Transition the sole RP currently configured (the master RP) + * to the eRP table + */ + master_rp = mlxsw_sp_acl_erp_table_master_rp(erp_table); + if (!master_rp) { + err = -EINVAL; + goto err_table_master_rp; + } + + /* Make sure the master RP is using a valid index, as + * only a single eRP row is currently allocated. + */ + master_rp->index = 0; + __set_bit(master_rp->index, erp_table->erp_index_bitmap); + + err = mlxsw_sp_acl_erp_table_erp_add(erp_table, master_rp); + if (err) + goto err_table_master_rp_add; + + /* Update Bloom filter before enabling eRP table, as rules + * on the master RP were not set to Bloom filter up to this + * point. + */ + err = mlxsw_acl_erp_table_bf_add(erp_table, master_rp); + if (err) + goto err_table_bf_add; + + err = mlxsw_sp_acl_erp_table_enable(erp_table, false); + if (err) + goto err_table_enable; + + return 0; + +err_table_enable: + mlxsw_acl_erp_table_bf_del(erp_table, master_rp); +err_table_bf_add: + mlxsw_sp_acl_erp_table_erp_del(master_rp); +err_table_master_rp_add: + __clear_bit(master_rp->index, erp_table->erp_index_bitmap); +err_table_master_rp: + mlxsw_sp_acl_erp_table_free(erp_core, erp_table->num_max_atcam_erps, + erp_table->aregion->type, + erp_table->base_index); + return err; +} + +static void +mlxsw_sp_acl_erp_region_master_mask_trans(struct mlxsw_sp_acl_erp_table *erp_table) +{ + struct mlxsw_sp_acl_erp_core *erp_core = erp_table->erp_core; + struct mlxsw_sp_acl_erp *master_rp; + + mlxsw_sp_acl_erp_table_disable(erp_table); + master_rp = mlxsw_sp_acl_erp_table_master_rp(erp_table); + if (!master_rp) + return; + mlxsw_acl_erp_table_bf_del(erp_table, master_rp); + mlxsw_sp_acl_erp_table_erp_del(master_rp); + __clear_bit(master_rp->index, erp_table->erp_index_bitmap); + mlxsw_sp_acl_erp_table_free(erp_core, erp_table->num_max_atcam_erps, + erp_table->aregion->type, + erp_table->base_index); +} + +static int +mlxsw_sp_acl_erp_region_erp_add(struct mlxsw_sp_acl_erp_table *erp_table, + struct mlxsw_sp_acl_erp *erp) +{ + struct mlxsw_sp_acl_tcam_region *region = erp_table->aregion->region; + struct mlxsw_sp *mlxsw_sp = erp_table->erp_core->mlxsw_sp; + bool ctcam_le = erp_table->num_ctcam_erps > 0; + char pererp_pl[MLXSW_REG_PERERP_LEN]; + + mlxsw_reg_pererp_pack(pererp_pl, region->id, ctcam_le, true, 0, + erp_table->base_index, 0); + mlxsw_reg_pererp_erp_vector_pack(pererp_pl, erp_table->erp_index_bitmap, + MLXSW_SP_ACL_ERP_MAX_PER_REGION); + mlxsw_reg_pererp_erpt_vector_set(pererp_pl, erp->index, true); + + return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(pererp), pererp_pl); +} + +static void mlxsw_sp_acl_erp_region_erp_del(struct mlxsw_sp_acl_erp *erp) +{ + struct mlxsw_sp_acl_erp_table *erp_table = erp->erp_table; + struct mlxsw_sp_acl_tcam_region *region = erp_table->aregion->region; + struct mlxsw_sp *mlxsw_sp = erp_table->erp_core->mlxsw_sp; + bool ctcam_le = erp_table->num_ctcam_erps > 0; + char pererp_pl[MLXSW_REG_PERERP_LEN]; + + mlxsw_reg_pererp_pack(pererp_pl, region->id, ctcam_le, true, 0, + erp_table->base_index, 0); + mlxsw_reg_pererp_erp_vector_pack(pererp_pl, erp_table->erp_index_bitmap, + MLXSW_SP_ACL_ERP_MAX_PER_REGION); + mlxsw_reg_pererp_erpt_vector_set(pererp_pl, erp->index, false); + + mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(pererp), pererp_pl); +} + +static int +mlxsw_sp_acl_erp_region_ctcam_enable(struct mlxsw_sp_acl_erp_table *erp_table) +{ + /* No need to re-enable lookup in the C-TCAM */ + if (erp_table->num_ctcam_erps > 1) + return 0; + + return mlxsw_sp_acl_erp_table_enable(erp_table, true); +} + +static void +mlxsw_sp_acl_erp_region_ctcam_disable(struct mlxsw_sp_acl_erp_table *erp_table) +{ + /* Only disable C-TCAM lookup when last C-TCAM eRP is deleted */ + if (erp_table->num_ctcam_erps > 1) + return; + + mlxsw_sp_acl_erp_table_enable(erp_table, false); +} + +static int +__mlxsw_sp_acl_erp_table_other_inc(struct mlxsw_sp_acl_erp_table *erp_table, + unsigned int *inc_num) +{ + int err; + + /* If there are C-TCAM eRP or deltas in use we need to transition + * the region to use eRP table, if it is not already done + */ + if (!mlxsw_sp_acl_erp_table_is_used(erp_table)) { + err = mlxsw_sp_acl_erp_region_table_trans(erp_table); + if (err) + return err; + } + + /* When C-TCAM or deltas are used, the eRP table must be used */ + if (erp_table->ops != &erp_multiple_masks_ops) + erp_table->ops = &erp_multiple_masks_ops; + + (*inc_num)++; + + return 0; +} + +static int mlxsw_sp_acl_erp_ctcam_inc(struct mlxsw_sp_acl_erp_table *erp_table) +{ + return __mlxsw_sp_acl_erp_table_other_inc(erp_table, + &erp_table->num_ctcam_erps); +} + +static int mlxsw_sp_acl_erp_delta_inc(struct mlxsw_sp_acl_erp_table *erp_table) +{ + return __mlxsw_sp_acl_erp_table_other_inc(erp_table, + &erp_table->num_deltas); +} + +static void +__mlxsw_sp_acl_erp_table_other_dec(struct mlxsw_sp_acl_erp_table *erp_table, + unsigned int *dec_num) +{ + (*dec_num)--; + + /* If there are no C-TCAM eRP or deltas in use, the state we + * transition to depends on the number of A-TCAM eRPs currently + * in use. + */ + if (erp_table->num_ctcam_erps > 0 || erp_table->num_deltas > 0) + return; + + switch (erp_table->num_atcam_erps) { + case 2: + /* Keep using the eRP table, but correctly set the + * operations pointer so that when an A-TCAM eRP is + * deleted we will transition to use the master mask + */ + erp_table->ops = &erp_two_masks_ops; + break; + case 1: + /* We only kept the eRP table because we had C-TCAM + * eRPs in use. Now that the last C-TCAM eRP is gone we + * can stop using the table and transition to use the + * master mask + */ + mlxsw_sp_acl_erp_region_master_mask_trans(erp_table); + erp_table->ops = &erp_single_mask_ops; + break; + case 0: + /* There are no more eRPs of any kind used by the region + * so free its eRP table and transition to initial state + */ + mlxsw_sp_acl_erp_table_disable(erp_table); + mlxsw_sp_acl_erp_table_free(erp_table->erp_core, + erp_table->num_max_atcam_erps, + erp_table->aregion->type, + erp_table->base_index); + erp_table->ops = &erp_no_mask_ops; + break; + default: + break; + } +} + +static void mlxsw_sp_acl_erp_ctcam_dec(struct mlxsw_sp_acl_erp_table *erp_table) +{ + __mlxsw_sp_acl_erp_table_other_dec(erp_table, + &erp_table->num_ctcam_erps); +} + +static void mlxsw_sp_acl_erp_delta_dec(struct mlxsw_sp_acl_erp_table *erp_table) +{ + __mlxsw_sp_acl_erp_table_other_dec(erp_table, + &erp_table->num_deltas); +} + +static struct mlxsw_sp_acl_erp * +mlxsw_sp_acl_erp_ctcam_mask_create(struct mlxsw_sp_acl_erp_table *erp_table, + struct mlxsw_sp_acl_erp_key *key) +{ + struct mlxsw_sp_acl_erp *erp; + int err; + + erp = kzalloc(sizeof(*erp), GFP_KERNEL); + if (!erp) + return ERR_PTR(-ENOMEM); + + memcpy(&erp->key, key, sizeof(*key)); + bitmap_from_arr32(erp->mask_bitmap, (u32 *) key->mask, + MLXSW_SP_ACL_TCAM_MASK_LEN); + + err = mlxsw_sp_acl_erp_ctcam_inc(erp_table); + if (err) + goto err_erp_ctcam_inc; + + erp->erp_table = erp_table; + + err = mlxsw_sp_acl_erp_master_mask_set(erp_table, &erp->key); + if (err) + goto err_master_mask_set; + + err = mlxsw_sp_acl_erp_region_ctcam_enable(erp_table); + if (err) + goto err_erp_region_ctcam_enable; + + return erp; + +err_erp_region_ctcam_enable: + mlxsw_sp_acl_erp_master_mask_clear(erp_table, &erp->key); +err_master_mask_set: + mlxsw_sp_acl_erp_ctcam_dec(erp_table); +err_erp_ctcam_inc: + kfree(erp); + return ERR_PTR(err); +} + +static void +mlxsw_sp_acl_erp_ctcam_mask_destroy(struct mlxsw_sp_acl_erp *erp) +{ + struct mlxsw_sp_acl_erp_table *erp_table = erp->erp_table; + + mlxsw_sp_acl_erp_region_ctcam_disable(erp_table); + mlxsw_sp_acl_erp_master_mask_clear(erp_table, &erp->key); + mlxsw_sp_acl_erp_ctcam_dec(erp_table); + kfree(erp); +} + +static struct mlxsw_sp_acl_erp * +mlxsw_sp_acl_erp_mask_create(struct mlxsw_sp_acl_erp_table *erp_table, + struct mlxsw_sp_acl_erp_key *key) +{ + struct mlxsw_sp_acl_erp *erp; + int err; + + if (key->ctcam) + return mlxsw_sp_acl_erp_ctcam_mask_create(erp_table, key); + + /* Expand the eRP table for the new eRP, if needed */ + err = mlxsw_sp_acl_erp_table_expand(erp_table); + if (err) + return ERR_PTR(err); + + erp = mlxsw_sp_acl_erp_generic_create(erp_table, key); + if (IS_ERR(erp)) + return erp; + + err = mlxsw_sp_acl_erp_index_get(erp_table, &erp->index); + if (err) + goto err_erp_index_get; + + err = mlxsw_sp_acl_erp_table_erp_add(erp_table, erp); + if (err) + goto err_table_erp_add; + + err = mlxsw_sp_acl_erp_region_erp_add(erp_table, erp); + if (err) + goto err_region_erp_add; + + erp_table->ops = &erp_multiple_masks_ops; + + return erp; + +err_region_erp_add: + mlxsw_sp_acl_erp_table_erp_del(erp); +err_table_erp_add: + mlxsw_sp_acl_erp_index_put(erp_table, erp->index); +err_erp_index_get: + mlxsw_sp_acl_erp_generic_destroy(erp); + return ERR_PTR(err); +} + +static void +mlxsw_sp_acl_erp_mask_destroy(struct mlxsw_sp_acl_erp_table *erp_table, + struct mlxsw_sp_acl_erp *erp) +{ + if (erp->key.ctcam) + return mlxsw_sp_acl_erp_ctcam_mask_destroy(erp); + + mlxsw_sp_acl_erp_region_erp_del(erp); + mlxsw_sp_acl_erp_table_erp_del(erp); + mlxsw_sp_acl_erp_index_put(erp_table, erp->index); + mlxsw_sp_acl_erp_generic_destroy(erp); + + if (erp_table->num_atcam_erps == 2 && erp_table->num_ctcam_erps == 0 && + erp_table->num_deltas == 0) + erp_table->ops = &erp_two_masks_ops; +} + +static struct mlxsw_sp_acl_erp * +mlxsw_sp_acl_erp_second_mask_create(struct mlxsw_sp_acl_erp_table *erp_table, + struct mlxsw_sp_acl_erp_key *key) +{ + struct mlxsw_sp_acl_erp *erp; + int err; + + if (key->ctcam) + return mlxsw_sp_acl_erp_ctcam_mask_create(erp_table, key); + + /* Transition to use eRP table instead of master mask */ + err = mlxsw_sp_acl_erp_region_table_trans(erp_table); + if (err) + return ERR_PTR(err); + + erp = mlxsw_sp_acl_erp_generic_create(erp_table, key); + if (IS_ERR(erp)) { + err = PTR_ERR(erp); + goto err_erp_create; + } + + err = mlxsw_sp_acl_erp_index_get(erp_table, &erp->index); + if (err) + goto err_erp_index_get; + + err = mlxsw_sp_acl_erp_table_erp_add(erp_table, erp); + if (err) + goto err_table_erp_add; + + err = mlxsw_sp_acl_erp_region_erp_add(erp_table, erp); + if (err) + goto err_region_erp_add; + + erp_table->ops = &erp_two_masks_ops; + + return erp; + +err_region_erp_add: + mlxsw_sp_acl_erp_table_erp_del(erp); +err_table_erp_add: + mlxsw_sp_acl_erp_index_put(erp_table, erp->index); +err_erp_index_get: + mlxsw_sp_acl_erp_generic_destroy(erp); +err_erp_create: + mlxsw_sp_acl_erp_region_master_mask_trans(erp_table); + return ERR_PTR(err); +} + +static void +mlxsw_sp_acl_erp_second_mask_destroy(struct mlxsw_sp_acl_erp_table *erp_table, + struct mlxsw_sp_acl_erp *erp) +{ + if (erp->key.ctcam) + return mlxsw_sp_acl_erp_ctcam_mask_destroy(erp); + + mlxsw_sp_acl_erp_region_erp_del(erp); + mlxsw_sp_acl_erp_table_erp_del(erp); + mlxsw_sp_acl_erp_index_put(erp_table, erp->index); + mlxsw_sp_acl_erp_generic_destroy(erp); + /* Transition to use master mask instead of eRP table */ + mlxsw_sp_acl_erp_region_master_mask_trans(erp_table); + + erp_table->ops = &erp_single_mask_ops; +} + +static struct mlxsw_sp_acl_erp * +mlxsw_sp_acl_erp_first_mask_create(struct mlxsw_sp_acl_erp_table *erp_table, + struct mlxsw_sp_acl_erp_key *key) +{ + struct mlxsw_sp_acl_erp *erp; + + if (key->ctcam) + return ERR_PTR(-EINVAL); + + erp = mlxsw_sp_acl_erp_generic_create(erp_table, key); + if (IS_ERR(erp)) + return erp; + + erp_table->ops = &erp_single_mask_ops; + + return erp; +} + +static void +mlxsw_sp_acl_erp_first_mask_destroy(struct mlxsw_sp_acl_erp_table *erp_table, + struct mlxsw_sp_acl_erp *erp) +{ + mlxsw_sp_acl_erp_generic_destroy(erp); + erp_table->ops = &erp_no_mask_ops; +} + +static void +mlxsw_sp_acl_erp_no_mask_destroy(struct mlxsw_sp_acl_erp_table *erp_table, + struct mlxsw_sp_acl_erp *erp) +{ + WARN_ON(1); +} + +struct mlxsw_sp_acl_erp_mask * +mlxsw_sp_acl_erp_mask_get(struct mlxsw_sp_acl_atcam_region *aregion, + const char *mask, bool ctcam) +{ + struct mlxsw_sp_acl_erp_table *erp_table = aregion->erp_table; + struct mlxsw_sp_acl_erp_key key; + struct objagg_obj *objagg_obj; + + memcpy(key.mask, mask, MLXSW_REG_PTCEX_FLEX_KEY_BLOCKS_LEN); + key.ctcam = ctcam; + mutex_lock(&erp_table->objagg_lock); + objagg_obj = objagg_obj_get(erp_table->objagg, &key); + mutex_unlock(&erp_table->objagg_lock); + if (IS_ERR(objagg_obj)) + return ERR_CAST(objagg_obj); + return (struct mlxsw_sp_acl_erp_mask *) objagg_obj; +} + +void mlxsw_sp_acl_erp_mask_put(struct mlxsw_sp_acl_atcam_region *aregion, + struct mlxsw_sp_acl_erp_mask *erp_mask) +{ + struct objagg_obj *objagg_obj = (struct objagg_obj *) erp_mask; + struct mlxsw_sp_acl_erp_table *erp_table = aregion->erp_table; + + mutex_lock(&erp_table->objagg_lock); + objagg_obj_put(erp_table->objagg, objagg_obj); + mutex_unlock(&erp_table->objagg_lock); +} + +int mlxsw_sp_acl_erp_bf_insert(struct mlxsw_sp *mlxsw_sp, + struct mlxsw_sp_acl_atcam_region *aregion, + struct mlxsw_sp_acl_erp_mask *erp_mask, + struct mlxsw_sp_acl_atcam_entry *aentry) +{ + struct objagg_obj *objagg_obj = (struct objagg_obj *) erp_mask; + const struct mlxsw_sp_acl_erp *erp = objagg_obj_root_priv(objagg_obj); + unsigned int erp_bank; + + if (!mlxsw_sp_acl_erp_table_is_used(erp->erp_table)) + return 0; + + erp_bank = mlxsw_sp_acl_erp_bank_get(erp); + return mlxsw_sp_acl_bf_entry_add(mlxsw_sp, + erp->erp_table->erp_core->bf, + aregion, erp_bank, aentry); +} + +void mlxsw_sp_acl_erp_bf_remove(struct mlxsw_sp *mlxsw_sp, + struct mlxsw_sp_acl_atcam_region *aregion, + struct mlxsw_sp_acl_erp_mask *erp_mask, + struct mlxsw_sp_acl_atcam_entry *aentry) +{ + struct objagg_obj *objagg_obj = (struct objagg_obj *) erp_mask; + const struct mlxsw_sp_acl_erp *erp = objagg_obj_root_priv(objagg_obj); + unsigned int erp_bank; + + if (!mlxsw_sp_acl_erp_table_is_used(erp->erp_table)) + return; + + erp_bank = mlxsw_sp_acl_erp_bank_get(erp); + mlxsw_sp_acl_bf_entry_del(mlxsw_sp, + erp->erp_table->erp_core->bf, + aregion, erp_bank, aentry); +} + +bool +mlxsw_sp_acl_erp_mask_is_ctcam(const struct mlxsw_sp_acl_erp_mask *erp_mask) +{ + struct objagg_obj *objagg_obj = (struct objagg_obj *) erp_mask; + const struct mlxsw_sp_acl_erp_key *key = objagg_obj_raw(objagg_obj); + + return key->ctcam; +} + +u8 mlxsw_sp_acl_erp_mask_erp_id(const struct mlxsw_sp_acl_erp_mask *erp_mask) +{ + struct objagg_obj *objagg_obj = (struct objagg_obj *) erp_mask; + const struct mlxsw_sp_acl_erp *erp = objagg_obj_root_priv(objagg_obj); + + return erp->id; +} + +struct mlxsw_sp_acl_erp_delta { + struct mlxsw_sp_acl_erp_key key; + u16 start; + u8 mask; +}; + +u16 mlxsw_sp_acl_erp_delta_start(const struct mlxsw_sp_acl_erp_delta *delta) +{ + return delta->start; +} + +u8 mlxsw_sp_acl_erp_delta_mask(const struct mlxsw_sp_acl_erp_delta *delta) +{ + return delta->mask; +} + +u8 mlxsw_sp_acl_erp_delta_value(const struct mlxsw_sp_acl_erp_delta *delta, + const char *enc_key) +{ + u16 start = delta->start; + u8 mask = delta->mask; + u16 tmp; + + if (!mask) + return 0; + + tmp = (unsigned char) enc_key[__MASK_IDX(start / 8)]; + if (start / 8 + 1 < __MASK_LEN) + tmp |= (unsigned char) enc_key[__MASK_IDX(start / 8 + 1)] << 8; + tmp >>= start % 8; + tmp &= mask; + return tmp; +} + +void mlxsw_sp_acl_erp_delta_clear(const struct mlxsw_sp_acl_erp_delta *delta, + const char *enc_key) +{ + u16 start = delta->start; + u8 mask = delta->mask; + unsigned char *byte; + u16 tmp; + + tmp = mask; + tmp <<= start % 8; + tmp = ~tmp; + + byte = (unsigned char *) &enc_key[__MASK_IDX(start / 8)]; + *byte &= tmp & 0xff; + if (start / 8 + 1 < __MASK_LEN) { + byte = (unsigned char *) &enc_key[__MASK_IDX(start / 8 + 1)]; + *byte &= (tmp >> 8) & 0xff; + } +} + +static const struct mlxsw_sp_acl_erp_delta +mlxsw_sp_acl_erp_delta_default = {}; + +const struct mlxsw_sp_acl_erp_delta * +mlxsw_sp_acl_erp_delta(const struct mlxsw_sp_acl_erp_mask *erp_mask) +{ + struct objagg_obj *objagg_obj = (struct objagg_obj *) erp_mask; + const struct mlxsw_sp_acl_erp_delta *delta; + + delta = objagg_obj_delta_priv(objagg_obj); + if (!delta) + delta = &mlxsw_sp_acl_erp_delta_default; + return delta; +} + +static int +mlxsw_sp_acl_erp_delta_fill(const struct mlxsw_sp_acl_erp_key *parent_key, + const struct mlxsw_sp_acl_erp_key *key, + u16 *delta_start, u8 *delta_mask) +{ + int offset = 0; + int si = -1; + u16 pmask; + u16 mask; + int i; + + /* The difference between 2 masks can be up to 8 consecutive bits. */ + for (i = 0; i < __MASK_LEN; i++) { + if (parent_key->mask[__MASK_IDX(i)] == key->mask[__MASK_IDX(i)]) + continue; + if (si == -1) + si = i; + else if (si != i - 1) + return -EINVAL; + } + if (si == -1) { + /* The masks are the same, this can happen in case eRPs with + * the same mask were created in both A-TCAM and C-TCAM. + * The only possible condition under which this can happen + * is identical rule insertion. Delta is not possible here. + */ + return -EINVAL; + } + pmask = (unsigned char) parent_key->mask[__MASK_IDX(si)]; + mask = (unsigned char) key->mask[__MASK_IDX(si)]; + if (si + 1 < __MASK_LEN) { + pmask |= (unsigned char) parent_key->mask[__MASK_IDX(si + 1)] << 8; + mask |= (unsigned char) key->mask[__MASK_IDX(si + 1)] << 8; + } + + if ((pmask ^ mask) & pmask) + return -EINVAL; + mask &= ~pmask; + while (!(mask & (1 << offset))) + offset++; + while (!(mask & 1)) + mask >>= 1; + if (mask & 0xff00) + return -EINVAL; + + *delta_start = si * 8 + offset; + *delta_mask = mask; + + return 0; +} + +static bool mlxsw_sp_acl_erp_delta_check(void *priv, const void *parent_obj, + const void *obj) +{ + const struct mlxsw_sp_acl_erp_key *parent_key = parent_obj; + const struct mlxsw_sp_acl_erp_key *key = obj; + u16 delta_start; + u8 delta_mask; + int err; + + err = mlxsw_sp_acl_erp_delta_fill(parent_key, key, + &delta_start, &delta_mask); + return err ? false : true; +} + +static int mlxsw_sp_acl_erp_hints_obj_cmp(const void *obj1, const void *obj2) +{ + const struct mlxsw_sp_acl_erp_key *key1 = obj1; + const struct mlxsw_sp_acl_erp_key *key2 = obj2; + + /* For hints purposes, two objects are considered equal + * in case the masks are the same. Does not matter what + * the "ctcam" value is. + */ + return memcmp(key1->mask, key2->mask, sizeof(key1->mask)); +} + +static void *mlxsw_sp_acl_erp_delta_create(void *priv, void *parent_obj, + void *obj) +{ + struct mlxsw_sp_acl_erp_key *parent_key = parent_obj; + struct mlxsw_sp_acl_atcam_region *aregion = priv; + struct mlxsw_sp_acl_erp_table *erp_table = aregion->erp_table; + struct mlxsw_sp_acl_erp_key *key = obj; + struct mlxsw_sp_acl_erp_delta *delta; + u16 delta_start; + u8 delta_mask; + int err; + + if (parent_key->ctcam || key->ctcam) + return ERR_PTR(-EINVAL); + err = mlxsw_sp_acl_erp_delta_fill(parent_key, key, + &delta_start, &delta_mask); + if (err) + return ERR_PTR(-EINVAL); + + delta = kzalloc(sizeof(*delta), GFP_KERNEL); + if (!delta) + return ERR_PTR(-ENOMEM); + delta->start = delta_start; + delta->mask = delta_mask; + + err = mlxsw_sp_acl_erp_delta_inc(erp_table); + if (err) + goto err_erp_delta_inc; + + memcpy(&delta->key, key, sizeof(*key)); + err = mlxsw_sp_acl_erp_master_mask_set(erp_table, &delta->key); + if (err) + goto err_master_mask_set; + + return delta; + +err_master_mask_set: + mlxsw_sp_acl_erp_delta_dec(erp_table); +err_erp_delta_inc: + kfree(delta); + return ERR_PTR(err); +} + +static void mlxsw_sp_acl_erp_delta_destroy(void *priv, void *delta_priv) +{ + struct mlxsw_sp_acl_erp_delta *delta = delta_priv; + struct mlxsw_sp_acl_atcam_region *aregion = priv; + struct mlxsw_sp_acl_erp_table *erp_table = aregion->erp_table; + + mlxsw_sp_acl_erp_master_mask_clear(erp_table, &delta->key); + mlxsw_sp_acl_erp_delta_dec(erp_table); + kfree(delta); +} + +static void *mlxsw_sp_acl_erp_root_create(void *priv, void *obj, + unsigned int root_id) +{ + struct mlxsw_sp_acl_atcam_region *aregion = priv; + struct mlxsw_sp_acl_erp_table *erp_table = aregion->erp_table; + struct mlxsw_sp_acl_erp_key *key = obj; + + if (!key->ctcam && + root_id != OBJAGG_OBJ_ROOT_ID_INVALID && + root_id >= MLXSW_SP_ACL_ERP_MAX_PER_REGION) + return ERR_PTR(-ENOBUFS); + return erp_table->ops->erp_create(erp_table, key); +} + +static void mlxsw_sp_acl_erp_root_destroy(void *priv, void *root_priv) +{ + struct mlxsw_sp_acl_atcam_region *aregion = priv; + struct mlxsw_sp_acl_erp_table *erp_table = aregion->erp_table; + + erp_table->ops->erp_destroy(erp_table, root_priv); +} + +static const struct objagg_ops mlxsw_sp_acl_erp_objagg_ops = { + .obj_size = sizeof(struct mlxsw_sp_acl_erp_key), + .delta_check = mlxsw_sp_acl_erp_delta_check, + .hints_obj_cmp = mlxsw_sp_acl_erp_hints_obj_cmp, + .delta_create = mlxsw_sp_acl_erp_delta_create, + .delta_destroy = mlxsw_sp_acl_erp_delta_destroy, + .root_create = mlxsw_sp_acl_erp_root_create, + .root_destroy = mlxsw_sp_acl_erp_root_destroy, +}; + +static struct mlxsw_sp_acl_erp_table * +mlxsw_sp_acl_erp_table_create(struct mlxsw_sp_acl_atcam_region *aregion, + struct objagg_hints *hints) +{ + struct mlxsw_sp_acl_erp_table *erp_table; + int err; + + erp_table = kzalloc(sizeof(*erp_table), GFP_KERNEL); + if (!erp_table) + return ERR_PTR(-ENOMEM); + + erp_table->objagg = objagg_create(&mlxsw_sp_acl_erp_objagg_ops, + hints, aregion); + if (IS_ERR(erp_table->objagg)) { + err = PTR_ERR(erp_table->objagg); + goto err_objagg_create; + } + + erp_table->erp_core = aregion->atcam->erp_core; + erp_table->ops = &erp_no_mask_ops; + INIT_LIST_HEAD(&erp_table->atcam_erps_list); + erp_table->aregion = aregion; + mutex_init(&erp_table->objagg_lock); + + return erp_table; + +err_objagg_create: + kfree(erp_table); + return ERR_PTR(err); +} + +static void +mlxsw_sp_acl_erp_table_destroy(struct mlxsw_sp_acl_erp_table *erp_table) +{ + WARN_ON(!list_empty(&erp_table->atcam_erps_list)); + mutex_destroy(&erp_table->objagg_lock); + objagg_destroy(erp_table->objagg); + kfree(erp_table); +} + +static int +mlxsw_sp_acl_erp_master_mask_init(struct mlxsw_sp_acl_atcam_region *aregion) +{ + struct mlxsw_sp *mlxsw_sp = aregion->region->mlxsw_sp; + char percr_pl[MLXSW_REG_PERCR_LEN]; + + mlxsw_reg_percr_pack(percr_pl, aregion->region->id); + return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(percr), percr_pl); +} + +static int +mlxsw_sp_acl_erp_region_param_init(struct mlxsw_sp_acl_atcam_region *aregion) +{ + struct mlxsw_sp *mlxsw_sp = aregion->region->mlxsw_sp; + char pererp_pl[MLXSW_REG_PERERP_LEN]; + + mlxsw_reg_pererp_pack(pererp_pl, aregion->region->id, false, false, 0, + 0, 0); + return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(pererp), pererp_pl); +} + +static int +mlxsw_sp_acl_erp_hints_check(struct mlxsw_sp *mlxsw_sp, + struct mlxsw_sp_acl_atcam_region *aregion, + struct objagg_hints *hints, bool *p_rehash_needed) +{ + struct mlxsw_sp_acl_erp_table *erp_table = aregion->erp_table; + const struct objagg_stats *ostats; + const struct objagg_stats *hstats; + int err; + + *p_rehash_needed = false; + + mutex_lock(&erp_table->objagg_lock); + ostats = objagg_stats_get(erp_table->objagg); + mutex_unlock(&erp_table->objagg_lock); + if (IS_ERR(ostats)) { + dev_err_ratelimited(mlxsw_sp->bus_info->dev, "Failed to get ERP stats\n"); + return PTR_ERR(ostats); + } + + hstats = objagg_hints_stats_get(hints); + if (IS_ERR(hstats)) { + dev_err_ratelimited(mlxsw_sp->bus_info->dev, "Failed to get ERP hints stats\n"); + err = PTR_ERR(hstats); + goto err_hints_stats_get; + } + + /* Very basic criterion for now. */ + if (hstats->root_count < ostats->root_count) + *p_rehash_needed = true; + + err = 0; + + objagg_stats_put(hstats); +err_hints_stats_get: + objagg_stats_put(ostats); + return err; +} + +void * +mlxsw_sp_acl_erp_rehash_hints_get(struct mlxsw_sp_acl_atcam_region *aregion) +{ + struct mlxsw_sp_acl_erp_table *erp_table = aregion->erp_table; + struct mlxsw_sp *mlxsw_sp = aregion->region->mlxsw_sp; + struct objagg_hints *hints; + bool rehash_needed; + int err; + + mutex_lock(&erp_table->objagg_lock); + hints = objagg_hints_get(erp_table->objagg, + OBJAGG_OPT_ALGO_SIMPLE_GREEDY); + mutex_unlock(&erp_table->objagg_lock); + if (IS_ERR(hints)) { + dev_err_ratelimited(mlxsw_sp->bus_info->dev, "Failed to create ERP hints\n"); + return ERR_CAST(hints); + } + err = mlxsw_sp_acl_erp_hints_check(mlxsw_sp, aregion, hints, + &rehash_needed); + if (err) + goto errout; + + if (!rehash_needed) { + err = -EAGAIN; + goto errout; + } + return hints; + +errout: + objagg_hints_put(hints); + return ERR_PTR(err); +} + +void mlxsw_sp_acl_erp_rehash_hints_put(void *hints_priv) +{ + struct objagg_hints *hints = hints_priv; + + objagg_hints_put(hints); +} + +int mlxsw_sp_acl_erp_region_init(struct mlxsw_sp_acl_atcam_region *aregion, + void *hints_priv) +{ + struct mlxsw_sp_acl_erp_table *erp_table; + struct objagg_hints *hints = hints_priv; + int err; + + erp_table = mlxsw_sp_acl_erp_table_create(aregion, hints); + if (IS_ERR(erp_table)) + return PTR_ERR(erp_table); + aregion->erp_table = erp_table; + + /* Initialize the region's master mask to all zeroes */ + err = mlxsw_sp_acl_erp_master_mask_init(aregion); + if (err) + goto err_erp_master_mask_init; + + /* Initialize the region to not use the eRP table */ + err = mlxsw_sp_acl_erp_region_param_init(aregion); + if (err) + goto err_erp_region_param_init; + + return 0; + +err_erp_region_param_init: +err_erp_master_mask_init: + mlxsw_sp_acl_erp_table_destroy(erp_table); + return err; +} + +void mlxsw_sp_acl_erp_region_fini(struct mlxsw_sp_acl_atcam_region *aregion) +{ + mlxsw_sp_acl_erp_table_destroy(aregion->erp_table); +} + +static int +mlxsw_sp_acl_erp_tables_sizes_query(struct mlxsw_sp *mlxsw_sp, + struct mlxsw_sp_acl_erp_core *erp_core) +{ + unsigned int size; + + if (!MLXSW_CORE_RES_VALID(mlxsw_sp->core, ACL_ERPT_ENTRIES_2KB) || + !MLXSW_CORE_RES_VALID(mlxsw_sp->core, ACL_ERPT_ENTRIES_4KB) || + !MLXSW_CORE_RES_VALID(mlxsw_sp->core, ACL_ERPT_ENTRIES_8KB) || + !MLXSW_CORE_RES_VALID(mlxsw_sp->core, ACL_ERPT_ENTRIES_12KB)) + return -EIO; + + size = MLXSW_CORE_RES_GET(mlxsw_sp->core, ACL_ERPT_ENTRIES_2KB); + erp_core->erpt_entries_size[MLXSW_SP_ACL_ATCAM_REGION_TYPE_2KB] = size; + + size = MLXSW_CORE_RES_GET(mlxsw_sp->core, ACL_ERPT_ENTRIES_4KB); + erp_core->erpt_entries_size[MLXSW_SP_ACL_ATCAM_REGION_TYPE_4KB] = size; + + size = MLXSW_CORE_RES_GET(mlxsw_sp->core, ACL_ERPT_ENTRIES_8KB); + erp_core->erpt_entries_size[MLXSW_SP_ACL_ATCAM_REGION_TYPE_8KB] = size; + + size = MLXSW_CORE_RES_GET(mlxsw_sp->core, ACL_ERPT_ENTRIES_12KB); + erp_core->erpt_entries_size[MLXSW_SP_ACL_ATCAM_REGION_TYPE_12KB] = size; + + return 0; +} + +static int mlxsw_sp_acl_erp_tables_init(struct mlxsw_sp *mlxsw_sp, + struct mlxsw_sp_acl_erp_core *erp_core) +{ + unsigned int erpt_bank_size; + int err; + + if (!MLXSW_CORE_RES_VALID(mlxsw_sp->core, ACL_MAX_ERPT_BANK_SIZE) || + !MLXSW_CORE_RES_VALID(mlxsw_sp->core, ACL_MAX_ERPT_BANKS)) + return -EIO; + erpt_bank_size = MLXSW_CORE_RES_GET(mlxsw_sp->core, + ACL_MAX_ERPT_BANK_SIZE); + erp_core->num_erp_banks = MLXSW_CORE_RES_GET(mlxsw_sp->core, + ACL_MAX_ERPT_BANKS); + + erp_core->erp_tables = gen_pool_create(0, -1); + if (!erp_core->erp_tables) + return -ENOMEM; + gen_pool_set_algo(erp_core->erp_tables, gen_pool_best_fit, NULL); + + err = gen_pool_add(erp_core->erp_tables, + MLXSW_SP_ACL_ERP_GENALLOC_OFFSET, erpt_bank_size, + -1); + if (err) + goto err_gen_pool_add; + + erp_core->bf = mlxsw_sp_acl_bf_init(mlxsw_sp, erp_core->num_erp_banks); + if (IS_ERR(erp_core->bf)) { + err = PTR_ERR(erp_core->bf); + goto err_bf_init; + } + + /* Different regions require masks of different sizes */ + err = mlxsw_sp_acl_erp_tables_sizes_query(mlxsw_sp, erp_core); + if (err) + goto err_erp_tables_sizes_query; + + return 0; + +err_erp_tables_sizes_query: + mlxsw_sp_acl_bf_fini(erp_core->bf); +err_bf_init: +err_gen_pool_add: + gen_pool_destroy(erp_core->erp_tables); + return err; +} + +static void mlxsw_sp_acl_erp_tables_fini(struct mlxsw_sp *mlxsw_sp, + struct mlxsw_sp_acl_erp_core *erp_core) +{ + mlxsw_sp_acl_bf_fini(erp_core->bf); + gen_pool_destroy(erp_core->erp_tables); +} + +int mlxsw_sp_acl_erps_init(struct mlxsw_sp *mlxsw_sp, + struct mlxsw_sp_acl_atcam *atcam) +{ + struct mlxsw_sp_acl_erp_core *erp_core; + int err; + + erp_core = kzalloc(sizeof(*erp_core), GFP_KERNEL); + if (!erp_core) + return -ENOMEM; + erp_core->mlxsw_sp = mlxsw_sp; + atcam->erp_core = erp_core; + + err = mlxsw_sp_acl_erp_tables_init(mlxsw_sp, erp_core); + if (err) + goto err_erp_tables_init; + + return 0; + +err_erp_tables_init: + kfree(erp_core); + return err; +} + +void mlxsw_sp_acl_erps_fini(struct mlxsw_sp *mlxsw_sp, + struct mlxsw_sp_acl_atcam *atcam) +{ + mlxsw_sp_acl_erp_tables_fini(mlxsw_sp, atcam->erp_core); + kfree(atcam->erp_core); +} |