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linux-zen-server/drivers/net/ethernet/mellanox/mlxsw/spectrum_acl_erp.c

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Initial commit
2023-08-30 17:53:23 +02:00
// 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;
/* 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;
*p_index = gen_pool_alloc(erp_core->erp_tables, num_rows * entry_size);
if (*p_index == 0)
return -ENOBUFS;
*p_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);
}