Release 4.11 drivers/net/ethernet/mellanox/mlxsw/spectrum_acl.c

Directory: drivers/net/ethernet/mellanox/mlxsw
/*
 * drivers/net/ethernet/mellanox/mlxsw/spectrum_acl.c
 * Copyright (c) 2017 Mellanox Technologies. All rights reserved.
 * Copyright (c) 2017 Jiri Pirko <jiri@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/kernel.h>
#include <linux/slab.h>
#include <linux/errno.h>
#include <linux/list.h>
#include <linux/string.h>
#include <linux/rhashtable.h>
#include <linux/netdevice.h>

#include "reg.h"
#include "core.h"
#include "resources.h"
#include "spectrum.h"
#include "core_acl_flex_keys.h"
#include "core_acl_flex_actions.h"
#include "spectrum_acl_flex_keys.h"


struct mlxsw_sp_acl {
	
struct mlxsw_afk *afk;
	
struct mlxsw_afa *afa;
	
const struct mlxsw_sp_acl_ops *ops;
	
struct rhashtable ruleset_ht;
	
unsigned long priv[0];
	/* priv has to be always the last item */
};



struct mlxsw_afk *mlxsw_sp_acl_afk(struct mlxsw_sp_acl *acl)
{
	return acl->afk;
}

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struct mlxsw_sp_acl_ruleset_ht_key {
	
struct net_device *dev; /* dev this ruleset is bound to */
	
bool ingress;
	
const struct mlxsw_sp_acl_profile_ops *ops;
};


struct mlxsw_sp_acl_ruleset {
	
struct rhash_head ht_node; /* Member of acl HT */
	
struct mlxsw_sp_acl_ruleset_ht_key ht_key;
	
struct rhashtable rule_ht;
	
unsigned int ref_count;
	
unsigned long priv[0];
	/* priv has to be always the last item */
};


struct mlxsw_sp_acl_rule {
	
struct rhash_head ht_node; /* Member of rule HT */
	
unsigned long cookie; /* HT key */
	
struct mlxsw_sp_acl_ruleset *ruleset;
	
struct mlxsw_sp_acl_rule_info *rulei;
	
unsigned long priv[0];
	/* priv has to be always the last item */
};


static const struct rhashtable_params mlxsw_sp_acl_ruleset_ht_params = {
	.key_len = sizeof(struct mlxsw_sp_acl_ruleset_ht_key),
	.key_offset = offsetof(struct mlxsw_sp_acl_ruleset, ht_key),
	.head_offset = offsetof(struct mlxsw_sp_acl_ruleset, ht_node),
	.automatic_shrinking = true,
};


static const struct rhashtable_params mlxsw_sp_acl_rule_ht_params = {
	.key_len = sizeof(unsigned long),
	.key_offset = offsetof(struct mlxsw_sp_acl_rule, cookie),
	.head_offset = offsetof(struct mlxsw_sp_acl_rule, ht_node),
	.automatic_shrinking = true,
};


static struct mlxsw_sp_acl_ruleset *

mlxsw_sp_acl_ruleset_create(struct mlxsw_sp *mlxsw_sp,
			    const struct mlxsw_sp_acl_profile_ops *ops)
{
	struct mlxsw_sp_acl *acl = mlxsw_sp->acl;
	struct mlxsw_sp_acl_ruleset *ruleset;
	size_t alloc_size;
	int err;

	alloc_size = sizeof(*ruleset) + ops->ruleset_priv_size;
	ruleset = kzalloc(alloc_size, GFP_KERNEL);
	if (!ruleset)
		return ERR_PTR(-ENOMEM);
	ruleset->ref_count = 1;
	ruleset->ht_key.ops = ops;

	err = rhashtable_init(&ruleset->rule_ht, &mlxsw_sp_acl_rule_ht_params);
	if (err)
		goto err_rhashtable_init;

	err = ops->ruleset_add(mlxsw_sp, acl->priv, ruleset->priv);
	if (err)
		goto err_ops_ruleset_add;

	return ruleset;

err_ops_ruleset_add:
	rhashtable_destroy(&ruleset->rule_ht);
err_rhashtable_init:
	kfree(ruleset);
	return ERR_PTR(err);
}

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static void mlxsw_sp_acl_ruleset_destroy(struct mlxsw_sp *mlxsw_sp,
					 struct mlxsw_sp_acl_ruleset *ruleset)
{
	const struct mlxsw_sp_acl_profile_ops *ops = ruleset->ht_key.ops;

	ops->ruleset_del(mlxsw_sp, ruleset->priv);
	rhashtable_destroy(&ruleset->rule_ht);
	kfree(ruleset);
}

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static int mlxsw_sp_acl_ruleset_bind(struct mlxsw_sp *mlxsw_sp,
				     struct mlxsw_sp_acl_ruleset *ruleset,
				     struct net_device *dev, bool ingress)
{
	const struct mlxsw_sp_acl_profile_ops *ops = ruleset->ht_key.ops;
	struct mlxsw_sp_acl *acl = mlxsw_sp->acl;
	int err;

	ruleset->ht_key.dev = dev;
	ruleset->ht_key.ingress = ingress;
	err = rhashtable_insert_fast(&acl->ruleset_ht, &ruleset->ht_node,
				     mlxsw_sp_acl_ruleset_ht_params);
	if (err)
		return err;
	err = ops->ruleset_bind(mlxsw_sp, ruleset->priv, dev, ingress);
	if (err)
		goto err_ops_ruleset_bind;
	return 0;

err_ops_ruleset_bind:
	rhashtable_remove_fast(&acl->ruleset_ht, &ruleset->ht_node,
			       mlxsw_sp_acl_ruleset_ht_params);
	return err;
}

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static void mlxsw_sp_acl_ruleset_unbind(struct mlxsw_sp *mlxsw_sp,
					struct mlxsw_sp_acl_ruleset *ruleset)
{
	const struct mlxsw_sp_acl_profile_ops *ops = ruleset->ht_key.ops;
	struct mlxsw_sp_acl *acl = mlxsw_sp->acl;

	ops->ruleset_unbind(mlxsw_sp, ruleset->priv);
	rhashtable_remove_fast(&acl->ruleset_ht, &ruleset->ht_node,
			       mlxsw_sp_acl_ruleset_ht_params);
}

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static void mlxsw_sp_acl_ruleset_ref_inc(struct mlxsw_sp_acl_ruleset *ruleset)
{
	ruleset->ref_count++;
}

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static void mlxsw_sp_acl_ruleset_ref_dec(struct mlxsw_sp *mlxsw_sp,
					 struct mlxsw_sp_acl_ruleset *ruleset)
{
	if (--ruleset->ref_count)
		return;
	mlxsw_sp_acl_ruleset_unbind(mlxsw_sp, ruleset);
	mlxsw_sp_acl_ruleset_destroy(mlxsw_sp, ruleset);
}

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struct mlxsw_sp_acl_ruleset *

mlxsw_sp_acl_ruleset_get(struct mlxsw_sp *mlxsw_sp,
			 struct net_device *dev, bool ingress,
			 enum mlxsw_sp_acl_profile profile)
{
	const struct mlxsw_sp_acl_profile_ops *ops;
	struct mlxsw_sp_acl *acl = mlxsw_sp->acl;
	struct mlxsw_sp_acl_ruleset_ht_key ht_key;
	struct mlxsw_sp_acl_ruleset *ruleset;
	int err;

	ops = acl->ops->profile_ops(mlxsw_sp, profile);
	if (!ops)
		return ERR_PTR(-EINVAL);

	memset(&ht_key, 0, sizeof(ht_key));
	ht_key.dev = dev;
	ht_key.ingress = ingress;
	ht_key.ops = ops;
	ruleset = rhashtable_lookup_fast(&acl->ruleset_ht, &ht_key,
					 mlxsw_sp_acl_ruleset_ht_params);
	if (ruleset) {
		mlxsw_sp_acl_ruleset_ref_inc(ruleset);
		return ruleset;
	}
	ruleset = mlxsw_sp_acl_ruleset_create(mlxsw_sp, ops);
	if (IS_ERR(ruleset))
		return ruleset;
	err = mlxsw_sp_acl_ruleset_bind(mlxsw_sp, ruleset, dev, ingress);
	if (err)
		goto err_ruleset_bind;
	return ruleset;

err_ruleset_bind:
	mlxsw_sp_acl_ruleset_destroy(mlxsw_sp, ruleset);
	return ERR_PTR(err);
}

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void mlxsw_sp_acl_ruleset_put(struct mlxsw_sp *mlxsw_sp,
			      struct mlxsw_sp_acl_ruleset *ruleset)
{
	mlxsw_sp_acl_ruleset_ref_dec(mlxsw_sp, ruleset);
}

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Jiri Pirko 22 100.00% 1 100.00%
Total 22 100.00% 1 100.00%


struct mlxsw_sp_acl_rule_info *

mlxsw_sp_acl_rulei_create(struct mlxsw_sp_acl *acl)
{
	struct mlxsw_sp_acl_rule_info *rulei;
	int err;

	rulei = kzalloc(sizeof(*rulei), GFP_KERNEL);
	if (!rulei)
		return NULL;
	rulei->act_block = mlxsw_afa_block_create(acl->afa);
	if (IS_ERR(rulei->act_block)) {
		err = PTR_ERR(rulei->act_block);
		goto err_afa_block_create;
	}
	return rulei;

err_afa_block_create:
	kfree(rulei);
	return ERR_PTR(err);
}

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Jiri Pirko 91 100.00% 1 100.00%
Total 91 100.00% 1 100.00%



void mlxsw_sp_acl_rulei_destroy(struct mlxsw_sp_acl_rule_info *rulei)
{
	mlxsw_afa_block_destroy(rulei->act_block);
	kfree(rulei);
}

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Total 22 100.00% 1 100.00%



int mlxsw_sp_acl_rulei_commit(struct mlxsw_sp_acl_rule_info *rulei)
{
	return mlxsw_afa_block_commit(rulei->act_block);
}

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Total 18 100.00% 1 100.00%



void mlxsw_sp_acl_rulei_priority(struct mlxsw_sp_acl_rule_info *rulei,
				 unsigned int priority)
{
	rulei->priority = priority;
}

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void mlxsw_sp_acl_rulei_keymask_u32(struct mlxsw_sp_acl_rule_info *rulei,
				    enum mlxsw_afk_element element,
				    u32 key_value, u32 mask_value)
{
	mlxsw_afk_values_add_u32(&rulei->values, element,
				 key_value, mask_value);
}

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void mlxsw_sp_acl_rulei_keymask_buf(struct mlxsw_sp_acl_rule_info *rulei,
				    enum mlxsw_afk_element element,
				    const char *key_value,
				    const char *mask_value, unsigned int len)
{
	mlxsw_afk_values_add_buf(&rulei->values, element,
				 key_value, mask_value, len);
}

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void mlxsw_sp_acl_rulei_act_continue(struct mlxsw_sp_acl_rule_info *rulei)
{
	mlxsw_afa_block_continue(rulei->act_block);
}

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void mlxsw_sp_acl_rulei_act_jump(struct mlxsw_sp_acl_rule_info *rulei,
				 u16 group_id)
{
	mlxsw_afa_block_jump(rulei->act_block, group_id);
}

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Total 22 100.00% 1 100.00%



int mlxsw_sp_acl_rulei_act_drop(struct mlxsw_sp_acl_rule_info *rulei)
{
	return mlxsw_afa_block_append_drop(rulei->act_block);
}

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int mlxsw_sp_acl_rulei_act_fwd(struct mlxsw_sp *mlxsw_sp,
			       struct mlxsw_sp_acl_rule_info *rulei,
			       struct net_device *out_dev)
{
	struct mlxsw_sp_port *mlxsw_sp_port;
	u8 local_port;
	bool in_port;

	if (out_dev) {
		if (!mlxsw_sp_port_dev_check(out_dev))
			return -EINVAL;
		mlxsw_sp_port = netdev_priv(out_dev);
		if (mlxsw_sp_port->mlxsw_sp != mlxsw_sp)
			return -EINVAL;
		local_port = mlxsw_sp_port->local_port;
		in_port = false;
	} else {
		/* If out_dev is NULL, the called wants to
                 * set forward to ingress port.
                 */
		local_port = 0;
		in_port = true;
	}
	return mlxsw_afa_block_append_fwd(rulei->act_block,
					  local_port, in_port);
}

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struct mlxsw_sp_acl_rule *

mlxsw_sp_acl_rule_create(struct mlxsw_sp *mlxsw_sp,
			 struct mlxsw_sp_acl_ruleset *ruleset,
			 unsigned long cookie)
{
	const struct mlxsw_sp_acl_profile_ops *ops = ruleset->ht_key.ops;
	struct mlxsw_sp_acl_rule *rule;
	int err;

	mlxsw_sp_acl_ruleset_ref_inc(ruleset);
	rule = kzalloc(sizeof(*rule) + ops->rule_priv_size, GFP_KERNEL);
	if (!rule) {
		err = -ENOMEM;
		goto err_alloc;
	}
	rule->cookie = cookie;
	rule->ruleset = ruleset;

	rule->rulei = mlxsw_sp_acl_rulei_create(mlxsw_sp->acl);
	if (IS_ERR(rule->rulei)) {
		err = PTR_ERR(rule->rulei);
		goto err_rulei_create;
	}
	return rule;

err_rulei_create:
	kfree(rule);
err_alloc:
	mlxsw_sp_acl_ruleset_ref_dec(mlxsw_sp, ruleset);
	return ERR_PTR(err);
}

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Jiri Pirko 149 100.00% 1 100.00%
Total 149 100.00% 1 100.00%



void mlxsw_sp_acl_rule_destroy(struct mlxsw_sp *mlxsw_sp,
			       struct mlxsw_sp_acl_rule *rule)
{
	struct mlxsw_sp_acl_ruleset *ruleset = rule->ruleset;

	mlxsw_sp_acl_rulei_destroy(rule->rulei);
	kfree(rule);
	mlxsw_sp_acl_ruleset_ref_dec(mlxsw_sp, ruleset);
}

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int mlxsw_sp_acl_rule_add(struct mlxsw_sp *mlxsw_sp,
			  struct mlxsw_sp_acl_rule *rule)
{
	struct mlxsw_sp_acl_ruleset *ruleset = rule->ruleset;
	const struct mlxsw_sp_acl_profile_ops *ops = ruleset->ht_key.ops;
	int err;

	err = ops->rule_add(mlxsw_sp, ruleset->priv, rule->priv, rule->rulei);
	if (err)
		return err;

	err = rhashtable_insert_fast(&ruleset->rule_ht, &rule->ht_node,
				     mlxsw_sp_acl_rule_ht_params);
	if (err)
		goto err_rhashtable_insert;

	return 0;

err_rhashtable_insert:
	ops->rule_del(mlxsw_sp, rule->priv);
	return err;
}

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Jiri Pirko 110 100.00% 1 100.00%
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void mlxsw_sp_acl_rule_del(struct mlxsw_sp *mlxsw_sp,
			   struct mlxsw_sp_acl_rule *rule)
{
	struct mlxsw_sp_acl_ruleset *ruleset = rule->ruleset;
	const struct mlxsw_sp_acl_profile_ops *ops = ruleset->ht_key.ops;

	rhashtable_remove_fast(&ruleset->rule_ht, &rule->ht_node,
			       mlxsw_sp_acl_rule_ht_params);
	ops->rule_del(mlxsw_sp, rule->priv);
}

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struct mlxsw_sp_acl_rule *

mlxsw_sp_acl_rule_lookup(struct mlxsw_sp *mlxsw_sp,
			 struct mlxsw_sp_acl_ruleset *ruleset,
			 unsigned long cookie)
{
	return rhashtable_lookup_fast(&ruleset->rule_ht, &cookie,
				       mlxsw_sp_acl_rule_ht_params);
}

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struct mlxsw_sp_acl_rule_info *

mlxsw_sp_acl_rule_rulei(struct mlxsw_sp_acl_rule *rule)
{
	return rule->rulei;
}

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#define MLXSW_SP_KDVL_ACT_EXT_SIZE 1



static int mlxsw_sp_act_kvdl_set_add(void *priv, u32 *p_kvdl_index,
				     char *enc_actions, bool is_first)
{
	struct mlxsw_sp *mlxsw_sp = priv;
	char pefa_pl[MLXSW_REG_PEFA_LEN];
	u32 kvdl_index;
	int ret;
	int err;

	/* The first action set of a TCAM entry is stored directly in TCAM,
         * not KVD linear area.
         */
	if (is_first)
		return 0;

	ret = mlxsw_sp_kvdl_alloc(mlxsw_sp, MLXSW_SP_KDVL_ACT_EXT_SIZE);
	if (ret < 0)
		return ret;
	kvdl_index = ret;
	mlxsw_reg_pefa_pack(pefa_pl, kvdl_index, enc_actions);
	err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(pefa), pefa_pl);
	if (err)
		goto err_pefa_write;
	*p_kvdl_index = kvdl_index;
	return 0;

err_pefa_write:
	mlxsw_sp_kvdl_free(mlxsw_sp, kvdl_index);
	return err;
}

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static void mlxsw_sp_act_kvdl_set_del(void *priv, u32 kvdl_index,
				      bool is_first)
{
	struct mlxsw_sp *mlxsw_sp = priv;

	if (is_first)
		return;
	mlxsw_sp_kvdl_free(mlxsw_sp, kvdl_index);
}

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static int mlxsw_sp_act_kvdl_fwd_entry_add(void *priv, u32 *p_kvdl_index,
					   u8 local_port)
{
	struct mlxsw_sp *mlxsw_sp = priv;
	char ppbs_pl[MLXSW_REG_PPBS_LEN];
	u32 kvdl_index;
	int ret;
	int err;

	ret = mlxsw_sp_kvdl_alloc(mlxsw_sp, 1);
	if (ret < 0)
		return ret;
	kvdl_index = ret;
	mlxsw_reg_ppbs_pack(ppbs_pl, kvdl_index, local_port);
	err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ppbs), ppbs_pl);
	if (err)
		goto err_ppbs_write;
	*p_kvdl_index = kvdl_index;
	return 0;

err_ppbs_write:
	mlxsw_sp_kvdl_free(mlxsw_sp, kvdl_index);
	return err;
}

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static void mlxsw_sp_act_kvdl_fwd_entry_del(void *priv, u32 kvdl_index)
{
	struct mlxsw_sp *mlxsw_sp = priv;

	mlxsw_sp_kvdl_free(mlxsw_sp, kvdl_index);
}

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static const struct mlxsw_afa_ops mlxsw_sp_act_afa_ops = {
	.kvdl_set_add		= mlxsw_sp_act_kvdl_set_add,
	.kvdl_set_del		= mlxsw_sp_act_kvdl_set_del,
	.kvdl_fwd_entry_add	= mlxsw_sp_act_kvdl_fwd_entry_add,
	.kvdl_fwd_entry_del	= mlxsw_sp_act_kvdl_fwd_entry_del,
};



int mlxsw_sp_acl_init(struct mlxsw_sp *mlxsw_sp)
{
	const struct mlxsw_sp_acl_ops *acl_ops = &mlxsw_sp_acl_tcam_ops;
	struct mlxsw_sp_acl *acl;
	int err;

	acl = kzalloc(sizeof(*acl) + acl_ops->priv_size, GFP_KERNEL);
	if (!acl)
		return -ENOMEM;
	mlxsw_sp->acl = acl;

	acl->afk = mlxsw_afk_create(MLXSW_CORE_RES_GET(mlxsw_sp->core,
						       ACL_FLEX_KEYS),
				    mlxsw_sp_afk_blocks,
				    MLXSW_SP_AFK_BLOCKS_COUNT);
	if (!acl->afk) {
		err = -ENOMEM;
		goto err_afk_create;
	}

	acl->afa = mlxsw_afa_create(MLXSW_CORE_RES_GET(mlxsw_sp->core,
						       ACL_ACTIONS_PER_SET),
				    &mlxsw_sp_act_afa_ops, mlxsw_sp);
	if (IS_ERR(acl->afa)) {
		err = PTR_ERR(acl->afa);
		goto err_afa_create;
	}

	err = rhashtable_init(&acl->ruleset_ht,
			      &mlxsw_sp_acl_ruleset_ht_params);
	if (err)
		goto err_rhashtable_init;

	err = acl_ops->init(mlxsw_sp, acl->priv);
	if (err)
		goto err_acl_ops_init;

	acl->ops = acl_ops;
	return 0;

err_acl_ops_init:
	rhashtable_destroy(&acl->ruleset_ht);
err_rhashtable_init:
	mlxsw_afa_destroy(acl->afa);
err_afa_create:
	mlxsw_afk_destroy(acl->afk);
err_afk_create:
	kfree(acl);
	return err;
}

Contributors
Person Tokens Prop Commits CommitProp
Jiri Pirko 227 100.00% 1 100.00%
Total 227 100.00% 1 100.00%



void mlxsw_sp_acl_fini(struct mlxsw_sp *mlxsw_sp)
{
	struct mlxsw_sp_acl *acl = mlxsw_sp->acl;
	const struct mlxsw_sp_acl_ops *acl_ops = acl->ops;

	acl_ops->fini(mlxsw_sp, acl->priv);
	rhashtable_destroy(&acl->ruleset_ht);
	mlxsw_afa_destroy(acl->afa);
	mlxsw_afk_destroy(acl->afk);
	kfree(acl);
}
Contributors
Person Tokens Prop Commits CommitProp
Jiri Pirko 67 100.00% 1 100.00%
Total 67 100.00% 1 100.00%

Overall Contributors
Person Tokens Prop Commits CommitProp
Jiri Pirko 2369 100.00% 1 100.00%
Total 2369 100.00% 1 100.00%
Directory: drivers/net/ethernet/mellanox/mlxsw

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with cregit.
Person	Tokens	Prop	Commits	CommitProp
Jiri Pirko	17	100.00%	1	100.00%
Total	17	100.00%	1	100.00%
cregit-Linux how code gets into the kernel

Release 4.11 drivers/net/ethernet/mellanox/mlxsw/spectrum_acl.c

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