--- /dev/null
+/*
+ * drivers/net/ethernet/mellanox/mlxsw/spectrum_acl_erp.c
+ * Copyright (c) 2018 Mellanox Technologies. All rights reserved.
+ * Copyright (c) 2018 Ido Schimmel <idosch@mellanox.com>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the names of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#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/rhashtable.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;
+ unsigned int num_erp_banks;
+};
+
+struct mlxsw_sp_acl_erp_key {
+ char mask[MLXSW_REG_PTCEX_FLEX_KEY_BLOCKS_LEN];
+};
+
+struct mlxsw_sp_acl_erp {
+ struct mlxsw_sp_acl_erp_key key;
+ u8 id;
+ u8 index;
+ refcount_t refcnt;
+ DECLARE_BITMAP(mask_bitmap, MLXSW_SP_ACL_TCAM_MASK_LEN);
+ struct list_head list;
+ struct rhash_head ht_node;
+ 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 rhashtable erp_ht;
+ 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;
+};
+
+static const struct rhashtable_params mlxsw_sp_acl_erp_ht_params = {
+ .key_len = sizeof(struct mlxsw_sp_acl_erp_key),
+ .key_offset = offsetof(struct mlxsw_sp_acl_erp, key),
+ .head_offset = offsetof(struct mlxsw_sp_acl_erp, ht_node),
+};
+
+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,
+};
+
+u8 mlxsw_sp_acl_erp_id(const struct mlxsw_sp_acl_erp *erp)
+{
+ return erp->id;
+}
+
+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,
+ const struct mlxsw_sp_acl_erp *erp)
+{
+ unsigned long bit;
+ int err;
+
+ for_each_set_bit(bit, erp->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, erp->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,
+ const struct mlxsw_sp_acl_erp *erp)
+{
+ unsigned long bit;
+ int err;
+
+ for_each_set_bit(bit, erp->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, erp->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));
+ bitmap_from_arr32(erp->mask_bitmap, (u32 *) key->mask,
+ MLXSW_SP_ACL_TCAM_MASK_LEN);
+ list_add(&erp->list, &erp_table->atcam_erps_list);
+ refcount_set(&erp->refcnt, 1);
+ erp_table->num_atcam_erps++;
+ erp->erp_table = erp_table;
+
+ err = mlxsw_sp_acl_erp_master_mask_set(erp_table, erp);
+ if (err)
+ goto err_master_mask_set;
+
+ err = rhashtable_insert_fast(&erp_table->erp_ht, &erp->ht_node,
+ mlxsw_sp_acl_erp_ht_params);
+ if (err)
+ goto err_rhashtable_insert;
+
+ return erp;
+
+err_rhashtable_insert:
+ mlxsw_sp_acl_erp_master_mask_clear(erp_table, 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;
+
+ rhashtable_remove_fast(&erp_table->erp_ht, &erp->ht_node,
+ mlxsw_sp_acl_erp_ht_params);
+ mlxsw_sp_acl_erp_master_mask_clear(erp_table, erp);
+ 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)
+{
+ 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, false, 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);
+ if (!master_rp)
+ return;
+
+ mlxsw_reg_pererp_pack(pererp_pl, region->id, false, false, 0, 0,
+ master_rp->id);
+ 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;
+ 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);
+ 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_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;
+ }
+
+ /* Maintain the same eRP bank for the master RP, so that we
+ * wouldn't need to update the bloom filter
+ */
+ master_rp->index = master_rp->index % erp_core->num_erp_banks;
+ __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;
+
+ err = mlxsw_sp_acl_erp_table_enable(erp_table);
+ if (err)
+ goto err_table_enable;
+
+ return 0;
+
+err_table_enable:
+ 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_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;
+ char pererp_pl[MLXSW_REG_PERERP_LEN];
+
+ mlxsw_reg_pererp_pack(pererp_pl, region->id, false, 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;
+ char pererp_pl[MLXSW_REG_PERERP_LEN];
+
+ mlxsw_reg_pererp_pack(pererp_pl, region->id, false, 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 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;
+
+ /* 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)
+{
+ 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->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;
+
+ /* 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)
+{
+ 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;
+
+ 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 *
+mlxsw_sp_acl_erp_get(struct mlxsw_sp_acl_atcam_region *aregion,
+ const char *mask)
+{
+ struct mlxsw_sp_acl_erp_table *erp_table = aregion->erp_table;
+ struct mlxsw_sp_acl_erp_key key;
+ struct mlxsw_sp_acl_erp *erp;
+
+ /* eRPs are allocated from a shared resource, but currently all
+ * allocations are done under RTNL.
+ */
+ ASSERT_RTNL();
+
+ memcpy(key.mask, mask, MLXSW_REG_PTCEX_FLEX_KEY_BLOCKS_LEN);
+ erp = rhashtable_lookup_fast(&erp_table->erp_ht, &key,
+ mlxsw_sp_acl_erp_ht_params);
+ if (erp) {
+ refcount_inc(&erp->refcnt);
+ return erp;
+ }
+
+ return erp_table->ops->erp_create(erp_table, &key);
+}
+
+void mlxsw_sp_acl_erp_put(struct mlxsw_sp_acl_atcam_region *aregion,
+ struct mlxsw_sp_acl_erp *erp)
+{
+ struct mlxsw_sp_acl_erp_table *erp_table = aregion->erp_table;
+
+ ASSERT_RTNL();
+
+ if (!refcount_dec_and_test(&erp->refcnt))
+ return;
+
+ erp_table->ops->erp_destroy(erp_table, erp);
+}
+
+static struct mlxsw_sp_acl_erp_table *
+mlxsw_sp_acl_erp_table_create(struct mlxsw_sp_acl_atcam_region *aregion)
+{
+ 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);
+
+ err = rhashtable_init(&erp_table->erp_ht, &mlxsw_sp_acl_erp_ht_params);
+ if (err)
+ goto err_rhashtable_init;
+
+ 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;
+
+ return erp_table;
+
+err_rhashtable_init:
+ 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));
+ rhashtable_destroy(&erp_table->erp_ht);
+ 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];
+ char *master_mask;
+
+ mlxsw_reg_percr_pack(percr_pl, aregion->region->id);
+ master_mask = mlxsw_reg_percr_master_mask_data(percr_pl);
+ memset(master_mask, 0, MLXSW_REG_PTCEX_FLEX_KEY_BLOCKS_LEN);
+ 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);
+}
+
+int mlxsw_sp_acl_erp_region_init(struct mlxsw_sp_acl_atcam_region *aregion)
+{
+ struct mlxsw_sp_acl_erp_table *erp_table;
+ int err;
+
+ erp_table = mlxsw_sp_acl_erp_table_create(aregion);
+ 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;
+
+ /* 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:
+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)
+{
+ 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);
+}
projects / openwrt / staging / blogic.git / commitdiff