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|
// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
/* Copyright (c) 2017-2018 Mellanox Technologies. All rights reserved */
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/errno.h>
#include <linux/bitops.h>
#include <linux/list.h>
#include <linux/rhashtable.h>
#include <linux/netdevice.h>
#include <linux/mutex.h>
#include <trace/events/mlxsw.h>
#include "reg.h"
#include "core.h"
#include "resources.h"
#include "spectrum.h"
#include "spectrum_acl_tcam.h"
#include "core_acl_flex_keys.h"
size_t mlxsw_sp_acl_tcam_priv_size(struct mlxsw_sp *mlxsw_sp)
{
const struct mlxsw_sp_acl_tcam_ops *ops = mlxsw_sp->acl_tcam_ops;
return ops->priv_size;
}
#define MLXSW_SP_ACL_TCAM_VREGION_REHASH_INTRVL_DFLT 5000 /* ms */
#define MLXSW_SP_ACL_TCAM_VREGION_REHASH_INTRVL_MIN 3000 /* ms */
#define MLXSW_SP_ACL_TCAM_VREGION_REHASH_CREDITS 100 /* number of entries */
int mlxsw_sp_acl_tcam_init(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_acl_tcam *tcam)
{
const struct mlxsw_sp_acl_tcam_ops *ops = mlxsw_sp->acl_tcam_ops;
u64 max_tcam_regions;
u64 max_regions;
u64 max_groups;
size_t alloc_size;
int err;
mutex_init(&tcam->lock);
tcam->vregion_rehash_intrvl =
MLXSW_SP_ACL_TCAM_VREGION_REHASH_INTRVL_DFLT;
INIT_LIST_HEAD(&tcam->vregion_list);
max_tcam_regions = MLXSW_CORE_RES_GET(mlxsw_sp->core,
ACL_MAX_TCAM_REGIONS);
max_regions = MLXSW_CORE_RES_GET(mlxsw_sp->core, ACL_MAX_REGIONS);
/* Use 1:1 mapping between ACL region and TCAM region */
if (max_tcam_regions < max_regions)
max_regions = max_tcam_regions;
alloc_size = sizeof(tcam->used_regions[0]) * BITS_TO_LONGS(max_regions);
tcam->used_regions = kzalloc(alloc_size, GFP_KERNEL);
if (!tcam->used_regions)
return -ENOMEM;
tcam->max_regions = max_regions;
max_groups = MLXSW_CORE_RES_GET(mlxsw_sp->core, ACL_MAX_GROUPS);
alloc_size = sizeof(tcam->used_groups[0]) * BITS_TO_LONGS(max_groups);
tcam->used_groups = kzalloc(alloc_size, GFP_KERNEL);
if (!tcam->used_groups) {
err = -ENOMEM;
goto err_alloc_used_groups;
}
tcam->max_groups = max_groups;
tcam->max_group_size = MLXSW_CORE_RES_GET(mlxsw_sp->core,
ACL_MAX_GROUP_SIZE);
err = ops->init(mlxsw_sp, tcam->priv, tcam);
if (err)
goto err_tcam_init;
return 0;
err_tcam_init:
kfree(tcam->used_groups);
err_alloc_used_groups:
kfree(tcam->used_regions);
return err;
}
void mlxsw_sp_acl_tcam_fini(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_acl_tcam *tcam)
{
const struct mlxsw_sp_acl_tcam_ops *ops = mlxsw_sp->acl_tcam_ops;
mutex_destroy(&tcam->lock);
ops->fini(mlxsw_sp, tcam->priv);
kfree(tcam->used_groups);
kfree(tcam->used_regions);
}
int mlxsw_sp_acl_tcam_priority_get(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_acl_rule_info *rulei,
u32 *priority, bool fillup_priority)
{
u64 max_priority;
if (!fillup_priority) {
*priority = 0;
return 0;
}
if (!MLXSW_CORE_RES_VALID(mlxsw_sp->core, KVD_SIZE))
return -EIO;
/* Priority range is 1..cap_kvd_size-1. */
max_priority = MLXSW_CORE_RES_GET(mlxsw_sp->core, KVD_SIZE) - 1;
if (rulei->priority >= max_priority)
return -EINVAL;
/* Unlike in TC, in HW, higher number means higher priority. */
*priority = max_priority - rulei->priority;
return 0;
}
static int mlxsw_sp_acl_tcam_region_id_get(struct mlxsw_sp_acl_tcam *tcam,
u16 *p_id)
{
u16 id;
id = find_first_zero_bit(tcam->used_regions, tcam->max_regions);
if (id < tcam->max_regions) {
__set_bit(id, tcam->used_regions);
*p_id = id;
return 0;
}
return -ENOBUFS;
}
static void mlxsw_sp_acl_tcam_region_id_put(struct mlxsw_sp_acl_tcam *tcam,
u16 id)
{
__clear_bit(id, tcam->used_regions);
}
static int mlxsw_sp_acl_tcam_group_id_get(struct mlxsw_sp_acl_tcam *tcam,
u16 *p_id)
{
u16 id;
id = find_first_zero_bit(tcam->used_groups, tcam->max_groups);
if (id < tcam->max_groups) {
__set_bit(id, tcam->used_groups);
*p_id = id;
return 0;
}
return -ENOBUFS;
}
static void mlxsw_sp_acl_tcam_group_id_put(struct mlxsw_sp_acl_tcam *tcam,
u16 id)
{
__clear_bit(id, tcam->used_groups);
}
struct mlxsw_sp_acl_tcam_pattern {
const enum mlxsw_afk_element *elements;
unsigned int elements_count;
};
struct mlxsw_sp_acl_tcam_group {
struct mlxsw_sp_acl_tcam *tcam;
u16 id;
struct mutex lock; /* guards region list updates */
struct list_head region_list;
unsigned int region_count;
};
struct mlxsw_sp_acl_tcam_vgroup {
struct mlxsw_sp_acl_tcam_group group;
struct list_head vregion_list;
struct rhashtable vchunk_ht;
const struct mlxsw_sp_acl_tcam_pattern *patterns;
unsigned int patterns_count;
bool tmplt_elusage_set;
struct mlxsw_afk_element_usage tmplt_elusage;
bool vregion_rehash_enabled;
};
struct mlxsw_sp_acl_tcam_rehash_ctx {
void *hints_priv;
bool this_is_rollback;
struct mlxsw_sp_acl_tcam_vchunk *current_vchunk; /* vchunk being
* currently migrated.
*/
struct mlxsw_sp_acl_tcam_ventry *start_ventry; /* ventry to start
* migration from in
* a vchunk being
* currently migrated.
*/
struct mlxsw_sp_acl_tcam_ventry *stop_ventry; /* ventry to stop
* migration at
* a vchunk being
* currently migrated.
*/
};
struct mlxsw_sp_acl_tcam_vregion {
struct mutex lock; /* Protects consistency of region, region2 pointers
* and vchunk_list.
*/
struct mlxsw_sp_acl_tcam_region *region;
struct mlxsw_sp_acl_tcam_region *region2; /* Used during migration */
struct list_head list; /* Member of a TCAM group */
struct list_head tlist; /* Member of a TCAM */
struct list_head vchunk_list; /* List of vchunks under this vregion */
struct mlxsw_afk_key_info *key_info;
struct mlxsw_sp_acl_tcam *tcam;
struct mlxsw_sp_acl_tcam_vgroup *vgroup;
struct {
struct delayed_work dw;
struct mlxsw_sp_acl_tcam_rehash_ctx ctx;
} rehash;
struct mlxsw_sp *mlxsw_sp;
bool failed_rollback; /* Indicates failed rollback during migration */
unsigned int ref_count;
};
struct mlxsw_sp_acl_tcam_vchunk;
struct mlxsw_sp_acl_tcam_chunk {
struct mlxsw_sp_acl_tcam_vchunk *vchunk;
struct mlxsw_sp_acl_tcam_region *region;
unsigned long priv[0];
/* priv has to be always the last item */
};
struct mlxsw_sp_acl_tcam_vchunk {
struct mlxsw_sp_acl_tcam_chunk *chunk;
struct mlxsw_sp_acl_tcam_chunk *chunk2; /* Used during migration */
struct list_head list; /* Member of a TCAM vregion */
struct rhash_head ht_node; /* Member of a chunk HT */
struct list_head ventry_list;
unsigned int priority; /* Priority within the vregion and group */
struct mlxsw_sp_acl_tcam_vgroup *vgroup;
struct mlxsw_sp_acl_tcam_vregion *vregion;
unsigned int ref_count;
};
struct mlxsw_sp_acl_tcam_entry {
struct mlxsw_sp_acl_tcam_ventry *ventry;
struct mlxsw_sp_acl_tcam_chunk *chunk;
unsigned long priv[0];
/* priv has to be always the last item */
};
struct mlxsw_sp_acl_tcam_ventry {
struct mlxsw_sp_acl_tcam_entry *entry;
struct list_head list; /* Member of a TCAM vchunk */
struct mlxsw_sp_acl_tcam_vchunk *vchunk;
struct mlxsw_sp_acl_rule_info *rulei;
};
static const struct rhashtable_params mlxsw_sp_acl_tcam_vchunk_ht_params = {
.key_len = sizeof(unsigned int),
.key_offset = offsetof(struct mlxsw_sp_acl_tcam_vchunk, priority),
.head_offset = offsetof(struct mlxsw_sp_acl_tcam_vchunk, ht_node),
.automatic_shrinking = true,
};
static int mlxsw_sp_acl_tcam_group_update(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_acl_tcam_group *group)
{
struct mlxsw_sp_acl_tcam_region *region;
char pagt_pl[MLXSW_REG_PAGT_LEN];
int acl_index = 0;
mlxsw_reg_pagt_pack(pagt_pl, group->id);
list_for_each_entry(region, &group->region_list, list) {
bool multi = false;
/* Check if the next entry in the list has the same vregion. */
if (region->list.next != &group->region_list &&
list_next_entry(region, list)->vregion == region->vregion)
multi = true;
mlxsw_reg_pagt_acl_id_pack(pagt_pl, acl_index++,
region->id, multi);
}
mlxsw_reg_pagt_size_set(pagt_pl, acl_index);
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(pagt), pagt_pl);
}
static int
mlxsw_sp_acl_tcam_group_add(struct mlxsw_sp_acl_tcam *tcam,
struct mlxsw_sp_acl_tcam_group *group)
{
int err;
group->tcam = tcam;
mutex_init(&group->lock);
INIT_LIST_HEAD(&group->region_list);
err = mlxsw_sp_acl_tcam_group_id_get(tcam, &group->id);
if (err)
return err;
return 0;
}
static void mlxsw_sp_acl_tcam_group_del(struct mlxsw_sp_acl_tcam_group *group)
{
struct mlxsw_sp_acl_tcam *tcam = group->tcam;
mutex_destroy(&group->lock);
mlxsw_sp_acl_tcam_group_id_put(tcam, group->id);
WARN_ON(!list_empty(&group->region_list));
}
static int
mlxsw_sp_acl_tcam_vgroup_add(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_acl_tcam *tcam,
struct mlxsw_sp_acl_tcam_vgroup *vgroup,
const struct mlxsw_sp_acl_tcam_pattern *patterns,
unsigned int patterns_count,
struct mlxsw_afk_element_usage *tmplt_elusage,
bool vregion_rehash_enabled)
{
int err;
vgroup->patterns = patterns;
vgroup->patterns_count = patterns_count;
vgroup->vregion_rehash_enabled = vregion_rehash_enabled;
if (tmplt_elusage) {
vgroup->tmplt_elusage_set = true;
memcpy(&vgroup->tmplt_elusage, tmplt_elusage,
sizeof(vgroup->tmplt_elusage));
}
INIT_LIST_HEAD(&vgroup->vregion_list);
err = mlxsw_sp_acl_tcam_group_add(tcam, &vgroup->group);
if (err)
return err;
err = rhashtable_init(&vgroup->vchunk_ht,
&mlxsw_sp_acl_tcam_vchunk_ht_params);
if (err)
goto err_rhashtable_init;
return 0;
err_rhashtable_init:
mlxsw_sp_acl_tcam_group_del(&vgroup->group);
return err;
}
static void
mlxsw_sp_acl_tcam_vgroup_del(struct mlxsw_sp_acl_tcam_vgroup *vgroup)
{
rhashtable_destroy(&vgroup->vchunk_ht);
mlxsw_sp_acl_tcam_group_del(&vgroup->group);
WARN_ON(!list_empty(&vgroup->vregion_list));
}
static int
mlxsw_sp_acl_tcam_group_bind(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_acl_tcam_group *group,
struct mlxsw_sp_port *mlxsw_sp_port,
bool ingress)
{
char ppbt_pl[MLXSW_REG_PPBT_LEN];
mlxsw_reg_ppbt_pack(ppbt_pl, ingress ? MLXSW_REG_PXBT_E_IACL :
MLXSW_REG_PXBT_E_EACL,
MLXSW_REG_PXBT_OP_BIND, mlxsw_sp_port->local_port,
group->id);
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ppbt), ppbt_pl);
}
static void
mlxsw_sp_acl_tcam_group_unbind(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_acl_tcam_group *group,
struct mlxsw_sp_port *mlxsw_sp_port,
bool ingress)
{
char ppbt_pl[MLXSW_REG_PPBT_LEN];
mlxsw_reg_ppbt_pack(ppbt_pl, ingress ? MLXSW_REG_PXBT_E_IACL :
MLXSW_REG_PXBT_E_EACL,
MLXSW_REG_PXBT_OP_UNBIND, mlxsw_sp_port->local_port,
group->id);
mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ppbt), ppbt_pl);
}
static u16
mlxsw_sp_acl_tcam_group_id(struct mlxsw_sp_acl_tcam_group *group)
{
return group->id;
}
static unsigned int
mlxsw_sp_acl_tcam_vregion_prio(struct mlxsw_sp_acl_tcam_vregion *vregion)
{
struct mlxsw_sp_acl_tcam_vchunk *vchunk;
if (list_empty(&vregion->vchunk_list))
return 0;
/* As a priority of a vregion, return priority of the first vchunk */
vchunk = list_first_entry(&vregion->vchunk_list,
typeof(*vchunk), list);
return vchunk->priority;
}
static unsigned int
mlxsw_sp_acl_tcam_vregion_max_prio(struct mlxsw_sp_acl_tcam_vregion *vregion)
{
struct mlxsw_sp_acl_tcam_vchunk *vchunk;
if (list_empty(&vregion->vchunk_list))
return 0;
vchunk = list_last_entry(&vregion->vchunk_list,
typeof(*vchunk), list);
return vchunk->priority;
}
static int
mlxsw_sp_acl_tcam_group_region_attach(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_acl_tcam_group *group,
struct mlxsw_sp_acl_tcam_region *region,
unsigned int priority,
struct mlxsw_sp_acl_tcam_region *next_region)
{
struct mlxsw_sp_acl_tcam_region *region2;
struct list_head *pos;
int err;
mutex_lock(&group->lock);
if (group->region_count == group->tcam->max_group_size) {
err = -ENOBUFS;
goto err_region_count_check;
}
if (next_region) {
/* If the next region is defined, place the new one
* before it. The next one is a sibling.
*/
pos = &next_region->list;
} else {
/* Position the region inside the list according to priority */
list_for_each(pos, &group->region_list) {
region2 = list_entry(pos, typeof(*region2), list);
if (mlxsw_sp_acl_tcam_vregion_prio(region2->vregion) >
priority)
break;
}
}
list_add_tail(®ion->list, pos);
region->group = group;
err = mlxsw_sp_acl_tcam_group_update(mlxsw_sp, group);
if (err)
goto err_group_update;
group->region_count++;
mutex_unlock(&group->lock);
return 0;
err_group_update:
list_del(®ion->list);
err_region_count_check:
mutex_unlock(&group->lock);
return err;
}
static void
mlxsw_sp_acl_tcam_group_region_detach(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_acl_tcam_region *region)
{
struct mlxsw_sp_acl_tcam_group *group = region->group;
mutex_lock(&group->lock);
list_del(®ion->list);
group->region_count--;
mlxsw_sp_acl_tcam_group_update(mlxsw_sp, group);
mutex_unlock(&group->lock);
}
static int
mlxsw_sp_acl_tcam_vgroup_vregion_attach(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_acl_tcam_vgroup *vgroup,
struct mlxsw_sp_acl_tcam_vregion *vregion,
unsigned int priority)
{
struct mlxsw_sp_acl_tcam_vregion *vregion2;
struct list_head *pos;
int err;
/* Position the vregion inside the list according to priority */
list_for_each(pos, &vgroup->vregion_list) {
vregion2 = list_entry(pos, typeof(*vregion2), list);
if (mlxsw_sp_acl_tcam_vregion_prio(vregion2) > priority)
break;
}
list_add_tail(&vregion->list, pos);
err = mlxsw_sp_acl_tcam_group_region_attach(mlxsw_sp, &vgroup->group,
vregion->region,
priority, NULL);
if (err)
goto err_region_attach;
return 0;
err_region_attach:
list_del(&vregion->list);
return err;
}
static void
mlxsw_sp_acl_tcam_vgroup_vregion_detach(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_acl_tcam_vregion *vregion)
{
list_del(&vregion->list);
if (vregion->region2)
mlxsw_sp_acl_tcam_group_region_detach(mlxsw_sp,
vregion->region2);
mlxsw_sp_acl_tcam_group_region_detach(mlxsw_sp, vregion->region);
}
static struct mlxsw_sp_acl_tcam_vregion *
mlxsw_sp_acl_tcam_vgroup_vregion_find(struct mlxsw_sp_acl_tcam_vgroup *vgroup,
unsigned int priority,
struct mlxsw_afk_element_usage *elusage,
bool *p_need_split)
{
struct mlxsw_sp_acl_tcam_vregion *vregion, *vregion2;
struct list_head *pos;
bool issubset;
list_for_each(pos, &vgroup->vregion_list) {
vregion = list_entry(pos, typeof(*vregion), list);
/* First, check if the requested priority does not rather belong
* under some of the next vregions.
*/
if (pos->next != &vgroup->vregion_list) { /* not last */
vregion2 = list_entry(pos->next, typeof(*vregion2),
list);
if (priority >=
mlxsw_sp_acl_tcam_vregion_prio(vregion2))
continue;
}
issubset = mlxsw_afk_key_info_subset(vregion->key_info,
elusage);
/* If requested element usage would not fit and the priority
* is lower than the currently inspected vregion we cannot
* use this region, so return NULL to indicate new vregion has
* to be created.
*/
if (!issubset &&
priority < mlxsw_sp_acl_tcam_vregion_prio(vregion))
return NULL;
/* If requested element usage would not fit and the priority
* is higher than the currently inspected vregion we cannot
* use this vregion. There is still some hope that the next
* vregion would be the fit. So let it be processed and
* eventually break at the check right above this.
*/
if (!issubset &&
priority > mlxsw_sp_acl_tcam_vregion_max_prio(vregion))
continue;
/* Indicate if the vregion needs to be split in order to add
* the requested priority. Split is needed when requested
* element usage won't fit into the found vregion.
*/
*p_need_split = !issubset;
return vregion;
}
return NULL; /* New vregion has to be created. */
}
static void
mlxsw_sp_acl_tcam_vgroup_use_patterns(struct mlxsw_sp_acl_tcam_vgroup *vgroup,
struct mlxsw_afk_element_usage *elusage,
struct mlxsw_afk_element_usage *out)
{
const struct mlxsw_sp_acl_tcam_pattern *pattern;
int i;
/* In case the template is set, we don't have to look up the pattern
* and just use the template.
*/
if (vgroup->tmplt_elusage_set) {
memcpy(out, &vgroup->tmplt_elusage, sizeof(*out));
WARN_ON(!mlxsw_afk_element_usage_subset(elusage, out));
return;
}
for (i = 0; i < vgroup->patterns_count; i++) {
pattern = &vgroup->patterns[i];
mlxsw_afk_element_usage_fill(out, pattern->elements,
pattern->elements_count);
if (mlxsw_afk_element_usage_subset(elusage, out))
return;
}
memcpy(out, elusage, sizeof(*out));
}
static int
mlxsw_sp_acl_tcam_region_alloc(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_acl_tcam_region *region)
{
struct mlxsw_afk_key_info *key_info = region->key_info;
char ptar_pl[MLXSW_REG_PTAR_LEN];
unsigned int encodings_count;
int i;
int err;
mlxsw_reg_ptar_pack(ptar_pl, MLXSW_REG_PTAR_OP_ALLOC,
region->key_type,
MLXSW_SP_ACL_TCAM_REGION_BASE_COUNT,
region->id, region->tcam_region_info);
encodings_count = mlxsw_afk_key_info_blocks_count_get(key_info);
for (i = 0; i < encodings_count; i++) {
u16 encoding;
encoding = mlxsw_afk_key_info_block_encoding_get(key_info, i);
mlxsw_reg_ptar_key_id_pack(ptar_pl, i, encoding);
}
err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ptar), ptar_pl);
if (err)
return err;
mlxsw_reg_ptar_unpack(ptar_pl, region->tcam_region_info);
return 0;
}
static void
mlxsw_sp_acl_tcam_region_free(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_acl_tcam_region *region)
{
char ptar_pl[MLXSW_REG_PTAR_LEN];
mlxsw_reg_ptar_pack(ptar_pl, MLXSW_REG_PTAR_OP_FREE,
region->key_type, 0, region->id,
region->tcam_region_info);
mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ptar), ptar_pl);
}
static int
mlxsw_sp_acl_tcam_region_enable(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_acl_tcam_region *region)
{
char pacl_pl[MLXSW_REG_PACL_LEN];
mlxsw_reg_pacl_pack(pacl_pl, region->id, true,
region->tcam_region_info);
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(pacl), pacl_pl);
}
static void
mlxsw_sp_acl_tcam_region_disable(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_acl_tcam_region *region)
{
char pacl_pl[MLXSW_REG_PACL_LEN];
mlxsw_reg_pacl_pack(pacl_pl, region->id, false,
region->tcam_region_info);
mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(pacl), pacl_pl);
}
static struct mlxsw_sp_acl_tcam_region *
mlxsw_sp_acl_tcam_region_create(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_acl_tcam *tcam,
struct mlxsw_sp_acl_tcam_vregion *vregion,
void *hints_priv)
{
const struct mlxsw_sp_acl_tcam_ops *ops = mlxsw_sp->acl_tcam_ops;
struct mlxsw_sp_acl_tcam_region *region;
int err;
region = kzalloc(sizeof(*region) + ops->region_priv_size, GFP_KERNEL);
if (!region)
return ERR_PTR(-ENOMEM);
region->mlxsw_sp = mlxsw_sp;
region->vregion = vregion;
region->key_info = vregion->key_info;
err = mlxsw_sp_acl_tcam_region_id_get(tcam, ®ion->id);
if (err)
goto err_region_id_get;
err = ops->region_associate(mlxsw_sp, region);
if (err)
goto err_tcam_region_associate;
region->key_type = ops->key_type;
err = mlxsw_sp_acl_tcam_region_alloc(mlxsw_sp, region);
if (err)
goto err_tcam_region_alloc;
err = mlxsw_sp_acl_tcam_region_enable(mlxsw_sp, region);
if (err)
goto err_tcam_region_enable;
err = ops->region_init(mlxsw_sp, region->priv, tcam->priv,
region, hints_priv);
if (err)
goto err_tcam_region_init;
return region;
err_tcam_region_init:
mlxsw_sp_acl_tcam_region_disable(mlxsw_sp, region);
err_tcam_region_enable:
mlxsw_sp_acl_tcam_region_free(mlxsw_sp, region);
err_tcam_region_alloc:
err_tcam_region_associate:
mlxsw_sp_acl_tcam_region_id_put(tcam, region->id);
err_region_id_get:
kfree(region);
return ERR_PTR(err);
}
static void
mlxsw_sp_acl_tcam_region_destroy(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_acl_tcam_region *region)
{
const struct mlxsw_sp_acl_tcam_ops *ops = mlxsw_sp->acl_tcam_ops;
ops->region_fini(mlxsw_sp, region->priv);
mlxsw_sp_acl_tcam_region_disable(mlxsw_sp, region);
mlxsw_sp_acl_tcam_region_free(mlxsw_sp, region);
mlxsw_sp_acl_tcam_region_id_put(region->group->tcam,
region->id);
kfree(region);
}
static void
mlxsw_sp_acl_tcam_vregion_rehash_work_schedule(struct mlxsw_sp_acl_tcam_vregion *vregion)
{
unsigned long interval = vregion->tcam->vregion_rehash_intrvl;
if (!interval)
return;
mlxsw_core_schedule_dw(&vregion->rehash.dw,
msecs_to_jiffies(interval));
}
static void
mlxsw_sp_acl_tcam_vregion_rehash(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_acl_tcam_vregion *vregion,
int *credits);
static void mlxsw_sp_acl_tcam_vregion_rehash_work(struct work_struct *work)
{
struct mlxsw_sp_acl_tcam_vregion *vregion =
container_of(work, struct mlxsw_sp_acl_tcam_vregion,
rehash.dw.work);
int credits = MLXSW_SP_ACL_TCAM_VREGION_REHASH_CREDITS;
mlxsw_sp_acl_tcam_vregion_rehash(vregion->mlxsw_sp, vregion, &credits);
if (credits < 0)
/* Rehash gone out of credits so it was interrupted.
* Schedule the work as soon as possible to continue.
*/
mlxsw_core_schedule_dw(&vregion->rehash.dw, 0);
else
mlxsw_sp_acl_tcam_vregion_rehash_work_schedule(vregion);
}
static void
mlxsw_sp_acl_tcam_rehash_ctx_vchunk_changed(struct mlxsw_sp_acl_tcam_vchunk *vchunk)
{
struct mlxsw_sp_acl_tcam_vregion *vregion = vchunk->vregion;
/* If a rule was added or deleted from vchunk which is currently
* under rehash migration, we have to reset the ventry pointers
* to make sure all rules are properly migrated.
*/
if (vregion->rehash.ctx.current_vchunk == vchunk) {
vregion->rehash.ctx.start_ventry = NULL;
vregion->rehash.ctx.stop_ventry = NULL;
}
}
static void
mlxsw_sp_acl_tcam_rehash_ctx_vregion_changed(struct mlxsw_sp_acl_tcam_vregion *vregion)
{
/* If a chunk was added or deleted from vregion we have to reset
* the current chunk pointer to make sure all chunks
* are properly migrated.
*/
vregion->rehash.ctx.current_vchunk = NULL;
}
static struct mlxsw_sp_acl_tcam_vregion *
mlxsw_sp_acl_tcam_vregion_create(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_acl_tcam_vgroup *vgroup,
unsigned int priority,
struct mlxsw_afk_element_usage *elusage)
{
const struct mlxsw_sp_acl_tcam_ops *ops = mlxsw_sp->acl_tcam_ops;
struct mlxsw_afk *afk = mlxsw_sp_acl_afk(mlxsw_sp->acl);
struct mlxsw_sp_acl_tcam *tcam = vgroup->group.tcam;
struct mlxsw_sp_acl_tcam_vregion *vregion;
int err;
vregion = kzalloc(sizeof(*vregion), GFP_KERNEL);
if (!vregion)
return ERR_PTR(-ENOMEM);
INIT_LIST_HEAD(&vregion->vchunk_list);
mutex_init(&vregion->lock);
vregion->tcam = tcam;
vregion->mlxsw_sp = mlxsw_sp;
vregion->vgroup = vgroup;
vregion->ref_count = 1;
vregion->key_info = mlxsw_afk_key_info_get(afk, elusage);
if (IS_ERR(vregion->key_info)) {
err = PTR_ERR(vregion->key_info);
goto err_key_info_get;
}
vregion->region = mlxsw_sp_acl_tcam_region_create(mlxsw_sp, tcam,
vregion, NULL);
if (IS_ERR(vregion->region)) {
err = PTR_ERR(vregion->region);
goto err_region_create;
}
err = mlxsw_sp_acl_tcam_vgroup_vregion_attach(mlxsw_sp, vgroup, vregion,
priority);
if (err)
goto err_vgroup_vregion_attach;
if (vgroup->vregion_rehash_enabled && ops->region_rehash_hints_get) {
/* Create the delayed work for vregion periodic rehash */
INIT_DELAYED_WORK(&vregion->rehash.dw,
mlxsw_sp_acl_tcam_vregion_rehash_work);
mlxsw_sp_acl_tcam_vregion_rehash_work_schedule(vregion);
mutex_lock(&tcam->lock);
list_add_tail(&vregion->tlist, &tcam->vregion_list);
mutex_unlock(&tcam->lock);
}
return vregion;
err_vgroup_vregion_attach:
mlxsw_sp_acl_tcam_region_destroy(mlxsw_sp, vregion->region);
err_region_create:
mlxsw_afk_key_info_put(vregion->key_info);
err_key_info_get:
kfree(vregion);
return ERR_PTR(err);
}
static void
mlxsw_sp_acl_tcam_vregion_destroy(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_acl_tcam_vregion *vregion)
{
const struct mlxsw_sp_acl_tcam_ops *ops = mlxsw_sp->acl_tcam_ops;
struct mlxsw_sp_acl_tcam_vgroup *vgroup = vregion->vgroup;
struct mlxsw_sp_acl_tcam *tcam = vregion->tcam;
if (vgroup->vregion_rehash_enabled && ops->region_rehash_hints_get) {
mutex_lock(&tcam->lock);
list_del(&vregion->tlist);
mutex_unlock(&tcam->lock);
cancel_delayed_work_sync(&vregion->rehash.dw);
}
mlxsw_sp_acl_tcam_vgroup_vregion_detach(mlxsw_sp, vregion);
if (vregion->region2)
mlxsw_sp_acl_tcam_region_destroy(mlxsw_sp, vregion->region2);
mlxsw_sp_acl_tcam_region_destroy(mlxsw_sp, vregion->region);
mlxsw_afk_key_info_put(vregion->key_info);
mutex_destroy(&vregion->lock);
kfree(vregion);
}
u32 mlxsw_sp_acl_tcam_vregion_rehash_intrvl_get(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_acl_tcam *tcam)
{
const struct mlxsw_sp_acl_tcam_ops *ops = mlxsw_sp->acl_tcam_ops;
u32 vregion_rehash_intrvl;
if (WARN_ON(!ops->region_rehash_hints_get))
return 0;
vregion_rehash_intrvl = tcam->vregion_rehash_intrvl;
return vregion_rehash_intrvl;
}
int mlxsw_sp_acl_tcam_vregion_rehash_intrvl_set(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_acl_tcam *tcam,
u32 val)
{
const struct mlxsw_sp_acl_tcam_ops *ops = mlxsw_sp->acl_tcam_ops;
struct mlxsw_sp_acl_tcam_vregion *vregion;
if (val < MLXSW_SP_ACL_TCAM_VREGION_REHASH_INTRVL_MIN && val)
return -EINVAL;
if (WARN_ON(!ops->region_rehash_hints_get))
return -EOPNOTSUPP;
tcam->vregion_rehash_intrvl = val;
mutex_lock(&tcam->lock);
list_for_each_entry(vregion, &tcam->vregion_list, tlist) {
if (val)
mlxsw_core_schedule_dw(&vregion->rehash.dw, 0);
else
cancel_delayed_work_sync(&vregion->rehash.dw);
}
mutex_unlock(&tcam->lock);
return 0;
}
static struct mlxsw_sp_acl_tcam_vregion *
mlxsw_sp_acl_tcam_vregion_get(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_acl_tcam_vgroup *vgroup,
unsigned int priority,
struct mlxsw_afk_element_usage *elusage)
{
struct mlxsw_afk_element_usage vregion_elusage;
struct mlxsw_sp_acl_tcam_vregion *vregion;
bool need_split;
vregion = mlxsw_sp_acl_tcam_vgroup_vregion_find(vgroup, priority,
elusage, &need_split);
if (vregion) {
if (need_split) {
/* According to priority, new vchunk should belong to
* an existing vregion. However, this vchunk needs
* elements that vregion does not contain. We need
* to split the existing vregion into two and create
* a new vregion for the new vchunk in between.
* This is not supported now.
*/
return ERR_PTR(-EOPNOTSUPP);
}
vregion->ref_count++;
return vregion;
}
mlxsw_sp_acl_tcam_vgroup_use_patterns(vgroup, elusage,
&vregion_elusage);
return mlxsw_sp_acl_tcam_vregion_create(mlxsw_sp, vgroup, priority,
&vregion_elusage);
}
static void
mlxsw_sp_acl_tcam_vregion_put(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_acl_tcam_vregion *vregion)
{
if (--vregion->ref_count)
return;
mlxsw_sp_acl_tcam_vregion_destroy(mlxsw_sp, vregion);
}
static struct mlxsw_sp_acl_tcam_chunk *
mlxsw_sp_acl_tcam_chunk_create(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_acl_tcam_vchunk *vchunk,
struct mlxsw_sp_acl_tcam_region *region)
{
const struct mlxsw_sp_acl_tcam_ops *ops = mlxsw_sp->acl_tcam_ops;
struct mlxsw_sp_acl_tcam_chunk *chunk;
chunk = kzalloc(sizeof(*chunk) + ops->chunk_priv_size, GFP_KERNEL);
if (!chunk)
return ERR_PTR(-ENOMEM);
chunk->vchunk = vchunk;
chunk->region = region;
ops->chunk_init(region->priv, chunk->priv, vchunk->priority);
return chunk;
}
static void
mlxsw_sp_acl_tcam_chunk_destroy(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_acl_tcam_chunk *chunk)
{
const struct mlxsw_sp_acl_tcam_ops *ops = mlxsw_sp->acl_tcam_ops;
ops->chunk_fini(chunk->priv);
kfree(chunk);
}
static struct mlxsw_sp_acl_tcam_vchunk *
mlxsw_sp_acl_tcam_vchunk_create(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_acl_tcam_vgroup *vgroup,
unsigned int priority,
struct mlxsw_afk_element_usage *elusage)
{
struct mlxsw_sp_acl_tcam_vregion *vregion;
struct mlxsw_sp_acl_tcam_vchunk *vchunk;
int err;
if (priority == MLXSW_SP_ACL_TCAM_CATCHALL_PRIO)
return ERR_PTR(-EINVAL);
vchunk = kzalloc(sizeof(*vchunk), GFP_KERNEL);
if (!vchunk)
return ERR_PTR(-ENOMEM);
INIT_LIST_HEAD(&vchunk->ventry_list);
vchunk->priority = priority;
vchunk->vgroup = vgroup;
vchunk->ref_count = 1;
vregion = mlxsw_sp_acl_tcam_vregion_get(mlxsw_sp, vgroup,
priority, elusage);
if (IS_ERR(vregion)) {
err = PTR_ERR(vregion);
goto err_vregion_get;
}
vchunk->vregion = vregion;
err = rhashtable_insert_fast(&vgroup->vchunk_ht, &vchunk->ht_node,
mlxsw_sp_acl_tcam_vchunk_ht_params);
if (err)
goto err_rhashtable_insert;
mutex_lock(&vregion->lock);
vchunk->chunk = mlxsw_sp_acl_tcam_chunk_create(mlxsw_sp, vchunk,
vchunk->vregion->region);
if (IS_ERR(vchunk->chunk)) {
mutex_unlock(&vregion->lock);
err = PTR_ERR(vchunk->chunk);
goto err_chunk_create;
}
mlxsw_sp_acl_tcam_rehash_ctx_vregion_changed(vregion);
list_add_tail(&vchunk->list, &vregion->vchunk_list);
mutex_unlock(&vregion->lock);
return vchunk;
err_chunk_create:
rhashtable_remove_fast(&vgroup->vchunk_ht, &vchunk->ht_node,
mlxsw_sp_acl_tcam_vchunk_ht_params);
err_rhashtable_insert:
mlxsw_sp_acl_tcam_vregion_put(mlxsw_sp, vregion);
err_vregion_get:
kfree(vchunk);
return ERR_PTR(err);
}
static void
mlxsw_sp_acl_tcam_vchunk_destroy(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_acl_tcam_vchunk *vchunk)
{
struct mlxsw_sp_acl_tcam_vregion *vregion = vchunk->vregion;
struct mlxsw_sp_acl_tcam_vgroup *vgroup = vchunk->vgroup;
mutex_lock(&vregion->lock);
mlxsw_sp_acl_tcam_rehash_ctx_vregion_changed(vregion);
list_del(&vchunk->list);
if (vchunk->chunk2)
mlxsw_sp_acl_tcam_chunk_destroy(mlxsw_sp, vchunk->chunk2);
mlxsw_sp_acl_tcam_chunk_destroy(mlxsw_sp, vchunk->chunk);
mutex_unlock(&vregion->lock);
rhashtable_remove_fast(&vgroup->vchunk_ht, &vchunk->ht_node,
mlxsw_sp_acl_tcam_vchunk_ht_params);
mlxsw_sp_acl_tcam_vregion_put(mlxsw_sp, vchunk->vregion);
kfree(vchunk);
}
static struct mlxsw_sp_acl_tcam_vchunk *
mlxsw_sp_acl_tcam_vchunk_get(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_acl_tcam_vgroup *vgroup,
unsigned int priority,
struct mlxsw_afk_element_usage *elusage)
{
struct mlxsw_sp_acl_tcam_vchunk *vchunk;
vchunk = rhashtable_lookup_fast(&vgroup->vchunk_ht, &priority,
mlxsw_sp_acl_tcam_vchunk_ht_params);
if (vchunk) {
if (WARN_ON(!mlxsw_afk_key_info_subset(vchunk->vregion->key_info,
elusage)))
return ERR_PTR(-EINVAL);
vchunk->ref_count++;
return vchunk;
}
return mlxsw_sp_acl_tcam_vchunk_create(mlxsw_sp, vgroup,
priority, elusage);
}
static void
mlxsw_sp_acl_tcam_vchunk_put(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_acl_tcam_vchunk *vchunk)
{
if (--vchunk->ref_count)
return;
mlxsw_sp_acl_tcam_vchunk_destroy(mlxsw_sp, vchunk);
}
static struct mlxsw_sp_acl_tcam_entry *
mlxsw_sp_acl_tcam_entry_create(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_acl_tcam_ventry *ventry,
struct mlxsw_sp_acl_tcam_chunk *chunk)
{
const struct mlxsw_sp_acl_tcam_ops *ops = mlxsw_sp->acl_tcam_ops;
struct mlxsw_sp_acl_tcam_entry *entry;
int err;
entry = kzalloc(sizeof(*entry) + ops->entry_priv_size, GFP_KERNEL);
if (!entry)
return ERR_PTR(-ENOMEM);
entry->ventry = ventry;
entry->chunk = chunk;
err = ops->entry_add(mlxsw_sp, chunk->region->priv, chunk->priv,
entry->priv, ventry->rulei);
if (err)
goto err_entry_add;
return entry;
err_entry_add:
kfree(entry);
return ERR_PTR(err);
}
static void mlxsw_sp_acl_tcam_entry_destroy(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_acl_tcam_entry *entry)
{
const struct mlxsw_sp_acl_tcam_ops *ops = mlxsw_sp->acl_tcam_ops;
ops->entry_del(mlxsw_sp, entry->chunk->region->priv,
entry->chunk->priv, entry->priv);
kfree(entry);
}
static int
mlxsw_sp_acl_tcam_entry_action_replace(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_acl_tcam_region *region,
struct mlxsw_sp_acl_tcam_entry *entry,
struct mlxsw_sp_acl_rule_info *rulei)
{
const struct mlxsw_sp_acl_tcam_ops *ops = mlxsw_sp->acl_tcam_ops;
return ops->entry_action_replace(mlxsw_sp, region->priv,
entry->priv, rulei);
}
static int
mlxsw_sp_acl_tcam_entry_activity_get(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_acl_tcam_entry *entry,
bool *activity)
{
const struct mlxsw_sp_acl_tcam_ops *ops = mlxsw_sp->acl_tcam_ops;
return ops->entry_activity_get(mlxsw_sp, entry->chunk->region->priv,
entry->priv, activity);
}
static int mlxsw_sp_acl_tcam_ventry_add(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_acl_tcam_vgroup *vgroup,
struct mlxsw_sp_acl_tcam_ventry *ventry,
struct mlxsw_sp_acl_rule_info *rulei)
{
struct mlxsw_sp_acl_tcam_vregion *vregion;
struct mlxsw_sp_acl_tcam_vchunk *vchunk;
int err;
vchunk = mlxsw_sp_acl_tcam_vchunk_get(mlxsw_sp, vgroup, rulei->priority,
&rulei->values.elusage);
if (IS_ERR(vchunk))
return PTR_ERR(vchunk);
ventry->vchunk = vchunk;
ventry->rulei = rulei;
vregion = vchunk->vregion;
mutex_lock(&vregion->lock);
ventry->entry = mlxsw_sp_acl_tcam_entry_create(mlxsw_sp, ventry,
vchunk->chunk);
if (IS_ERR(ventry->entry)) {
mutex_unlock(&vregion->lock);
err = PTR_ERR(ventry->entry);
goto err_entry_create;
}
list_add_tail(&ventry->list, &vchunk->ventry_list);
mlxsw_sp_acl_tcam_rehash_ctx_vchunk_changed(vchunk);
mutex_unlock(&vregion->lock);
return 0;
err_entry_create:
mlxsw_sp_acl_tcam_vchunk_put(mlxsw_sp, vchunk);
return err;
}
static void mlxsw_sp_acl_tcam_ventry_del(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_acl_tcam_ventry *ventry)
{
struct mlxsw_sp_acl_tcam_vchunk *vchunk = ventry->vchunk;
struct mlxsw_sp_acl_tcam_vregion *vregion = vchunk->vregion;
mutex_lock(&vregion->lock);
mlxsw_sp_acl_tcam_rehash_ctx_vchunk_changed(vchunk);
list_del(&ventry->list);
mlxsw_sp_acl_tcam_entry_destroy(mlxsw_sp, ventry->entry);
mutex_unlock(&vregion->lock);
mlxsw_sp_acl_tcam_vchunk_put(mlxsw_sp, vchunk);
}
static int
mlxsw_sp_acl_tcam_ventry_action_replace(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_acl_tcam_ventry *ventry,
struct mlxsw_sp_acl_rule_info *rulei)
{
struct mlxsw_sp_acl_tcam_vchunk *vchunk = ventry->vchunk;
return mlxsw_sp_acl_tcam_entry_action_replace(mlxsw_sp,
vchunk->vregion->region,
ventry->entry, rulei);
}
static int
mlxsw_sp_acl_tcam_ventry_activity_get(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_acl_tcam_ventry *ventry,
bool *activity)
{
return mlxsw_sp_acl_tcam_entry_activity_get(mlxsw_sp,
ventry->entry, activity);
}
static int
mlxsw_sp_acl_tcam_ventry_migrate(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_acl_tcam_ventry *ventry,
struct mlxsw_sp_acl_tcam_chunk *chunk,
int *credits)
{
struct mlxsw_sp_acl_tcam_entry *new_entry;
/* First check if the entry is not already where we want it to be. */
if (ventry->entry->chunk == chunk)
return 0;
if (--(*credits) < 0)
return 0;
new_entry = mlxsw_sp_acl_tcam_entry_create(mlxsw_sp, ventry, chunk);
if (IS_ERR(new_entry))
return PTR_ERR(new_entry);
mlxsw_sp_acl_tcam_entry_destroy(mlxsw_sp, ventry->entry);
ventry->entry = new_entry;
return 0;
}
static int
mlxsw_sp_acl_tcam_vchunk_migrate_start(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_acl_tcam_vchunk *vchunk,
struct mlxsw_sp_acl_tcam_region *region,
struct mlxsw_sp_acl_tcam_rehash_ctx *ctx)
{
struct mlxsw_sp_acl_tcam_chunk *new_chunk;
new_chunk = mlxsw_sp_acl_tcam_chunk_create(mlxsw_sp, vchunk, region);
if (IS_ERR(new_chunk))
return PTR_ERR(new_chunk);
vchunk->chunk2 = vchunk->chunk;
vchunk->chunk = new_chunk;
ctx->current_vchunk = vchunk;
ctx->start_ventry = NULL;
ctx->stop_ventry = NULL;
return 0;
}
static void
mlxsw_sp_acl_tcam_vchunk_migrate_end(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_acl_tcam_vchunk *vchunk,
struct mlxsw_sp_acl_tcam_rehash_ctx *ctx)
{
mlxsw_sp_acl_tcam_chunk_destroy(mlxsw_sp, vchunk->chunk2);
vchunk->chunk2 = NULL;
ctx->current_vchunk = NULL;
}
static int
mlxsw_sp_acl_tcam_vchunk_migrate_one(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_acl_tcam_vchunk *vchunk,
struct mlxsw_sp_acl_tcam_region *region,
struct mlxsw_sp_acl_tcam_rehash_ctx *ctx,
int *credits)
{
struct mlxsw_sp_acl_tcam_ventry *ventry;
int err;
if (vchunk->chunk->region != region) {
err = mlxsw_sp_acl_tcam_vchunk_migrate_start(mlxsw_sp, vchunk,
region, ctx);
if (err)
return err;
} else if (!vchunk->chunk2) {
/* The chunk is already as it should be, nothing to do. */
return 0;
}
/* If the migration got interrupted, we have the ventry to start from
* stored in context.
*/
if (ctx->start_ventry)
ventry = ctx->start_ventry;
else
ventry = list_first_entry(&vchunk->ventry_list,
typeof(*ventry), list);
list_for_each_entry_from(ventry, &vchunk->ventry_list, list) {
/* During rollback, once we reach the ventry that failed
* to migrate, we are done.
*/
if (ventry == ctx->stop_ventry)
break;
err = mlxsw_sp_acl_tcam_ventry_migrate(mlxsw_sp, ventry,
vchunk->chunk, credits);
if (err) {
if (ctx->this_is_rollback)
return err;
/* Swap the chunk and chunk2 pointers so the follow-up
* rollback call will see the original chunk pointer
* in vchunk->chunk.
*/
swap(vchunk->chunk, vchunk->chunk2);
/* The rollback has to be done from beginning of the
* chunk, that is why we have to null the start_ventry.
* However, we know where to stop the rollback,
* at the current ventry.
*/
ctx->start_ventry = NULL;
ctx->stop_ventry = ventry;
return err;
} else if (*credits < 0) {
/* We are out of credits, the rest of the ventries
* will be migrated later. Save the ventry
* which we ended with.
*/
ctx->start_ventry = ventry;
return 0;
}
}
mlxsw_sp_acl_tcam_vchunk_migrate_end(mlxsw_sp, vchunk, ctx);
return 0;
}
static int
mlxsw_sp_acl_tcam_vchunk_migrate_all(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_acl_tcam_vregion *vregion,
struct mlxsw_sp_acl_tcam_rehash_ctx *ctx,
int *credits)
{
struct mlxsw_sp_acl_tcam_vchunk *vchunk;
int err;
/* If the migration got interrupted, we have the vchunk
* we are working on stored in context.
*/
if (ctx->current_vchunk)
vchunk = ctx->current_vchunk;
else
vchunk = list_first_entry(&vregion->vchunk_list,
typeof(*vchunk), list);
list_for_each_entry_from(vchunk, &vregion->vchunk_list, list) {
err = mlxsw_sp_acl_tcam_vchunk_migrate_one(mlxsw_sp, vchunk,
vregion->region,
ctx, credits);
if (err || *credits < 0)
return err;
}
return 0;
}
static int
mlxsw_sp_acl_tcam_vregion_migrate(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_acl_tcam_vregion *vregion,
struct mlxsw_sp_acl_tcam_rehash_ctx *ctx,
int *credits)
{
int err, err2;
trace_mlxsw_sp_acl_tcam_vregion_migrate(mlxsw_sp, vregion);
mutex_lock(&vregion->lock);
err = mlxsw_sp_acl_tcam_vchunk_migrate_all(mlxsw_sp, vregion,
ctx, credits);
if (err) {
/* In case migration was not successful, we need to swap
* so the original region pointer is assigned again
* to vregion->region.
*/
swap(vregion->region, vregion->region2);
ctx->current_vchunk = NULL;
ctx->this_is_rollback = true;
err2 = mlxsw_sp_acl_tcam_vchunk_migrate_all(mlxsw_sp, vregion,
ctx, credits);
if (err2) {
vregion->failed_rollback = true;
trace_mlxsw_sp_acl_tcam_vregion_rehash_dis(mlxsw_sp,
vregion);
dev_err(mlxsw_sp->bus_info->dev, "Failed to rollback during vregion migration fail\n");
}
}
mutex_unlock(&vregion->lock);
trace_mlxsw_sp_acl_tcam_vregion_migrate_end(mlxsw_sp, vregion);
return err;
}
static bool
mlxsw_sp_acl_tcam_vregion_rehash_in_progress(const struct mlxsw_sp_acl_tcam_rehash_ctx *ctx)
{
return ctx->hints_priv;
}
static int
mlxsw_sp_acl_tcam_vregion_rehash_start(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_acl_tcam_vregion *vregion,
struct mlxsw_sp_acl_tcam_rehash_ctx *ctx)
{
const struct mlxsw_sp_acl_tcam_ops *ops = mlxsw_sp->acl_tcam_ops;
unsigned int priority = mlxsw_sp_acl_tcam_vregion_prio(vregion);
struct mlxsw_sp_acl_tcam_region *new_region;
void *hints_priv;
int err;
trace_mlxsw_sp_acl_tcam_vregion_rehash(mlxsw_sp, vregion);
if (vregion->failed_rollback)
return -EBUSY;
hints_priv = ops->region_rehash_hints_get(vregion->region->priv);
if (IS_ERR(hints_priv))
return PTR_ERR(hints_priv);
new_region = mlxsw_sp_acl_tcam_region_create(mlxsw_sp, vregion->tcam,
vregion, hints_priv);
if (IS_ERR(new_region)) {
err = PTR_ERR(new_region);
goto err_region_create;
}
/* vregion->region contains the pointer to the new region
* we are going to migrate to.
*/
vregion->region2 = vregion->region;
vregion->region = new_region;
err = mlxsw_sp_acl_tcam_group_region_attach(mlxsw_sp,
vregion->region2->group,
new_region, priority,
vregion->region2);
if (err)
goto err_group_region_attach;
ctx->hints_priv = hints_priv;
ctx->this_is_rollback = false;
return 0;
err_group_region_attach:
vregion->region = vregion->region2;
vregion->region2 = NULL;
mlxsw_sp_acl_tcam_region_destroy(mlxsw_sp, new_region);
err_region_create:
ops->region_rehash_hints_put(hints_priv);
return err;
}
static void
mlxsw_sp_acl_tcam_vregion_rehash_end(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_acl_tcam_vregion *vregion,
struct mlxsw_sp_acl_tcam_rehash_ctx *ctx)
{
struct mlxsw_sp_acl_tcam_region *unused_region = vregion->region2;
const struct mlxsw_sp_acl_tcam_ops *ops = mlxsw_sp->acl_tcam_ops;
if (!vregion->failed_rollback) {
vregion->region2 = NULL;
mlxsw_sp_acl_tcam_group_region_detach(mlxsw_sp, unused_region);
mlxsw_sp_acl_tcam_region_destroy(mlxsw_sp, unused_region);
}
ops->region_rehash_hints_put(ctx->hints_priv);
ctx->hints_priv = NULL;
}
static void
mlxsw_sp_acl_tcam_vregion_rehash(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_acl_tcam_vregion *vregion,
int *credits)
{
struct mlxsw_sp_acl_tcam_rehash_ctx *ctx = &vregion->rehash.ctx;
int err;
/* Check if the previous rehash work was interrupted
* which means we have to continue it now.
* If not, start a new rehash.
*/
if (!mlxsw_sp_acl_tcam_vregion_rehash_in_progress(ctx)) {
err = mlxsw_sp_acl_tcam_vregion_rehash_start(mlxsw_sp,
vregion, ctx);
if (err) {
if (err != -EAGAIN)
dev_err(mlxsw_sp->bus_info->dev, "Failed get rehash hints\n");
return;
}
}
err = mlxsw_sp_acl_tcam_vregion_migrate(mlxsw_sp, vregion,
ctx, credits);
if (err) {
dev_err(mlxsw_sp->bus_info->dev, "Failed to migrate vregion\n");
}
if (*credits >= 0)
mlxsw_sp_acl_tcam_vregion_rehash_end(mlxsw_sp, vregion, ctx);
}
static const enum mlxsw_afk_element mlxsw_sp_acl_tcam_pattern_ipv4[] = {
MLXSW_AFK_ELEMENT_SRC_SYS_PORT,
MLXSW_AFK_ELEMENT_DMAC_32_47,
MLXSW_AFK_ELEMENT_DMAC_0_31,
MLXSW_AFK_ELEMENT_SMAC_32_47,
MLXSW_AFK_ELEMENT_SMAC_0_31,
MLXSW_AFK_ELEMENT_ETHERTYPE,
MLXSW_AFK_ELEMENT_IP_PROTO,
MLXSW_AFK_ELEMENT_SRC_IP_0_31,
MLXSW_AFK_ELEMENT_DST_IP_0_31,
MLXSW_AFK_ELEMENT_DST_L4_PORT,
MLXSW_AFK_ELEMENT_SRC_L4_PORT,
MLXSW_AFK_ELEMENT_VID,
MLXSW_AFK_ELEMENT_PCP,
MLXSW_AFK_ELEMENT_TCP_FLAGS,
MLXSW_AFK_ELEMENT_IP_TTL_,
MLXSW_AFK_ELEMENT_IP_ECN,
MLXSW_AFK_ELEMENT_IP_DSCP,
};
static const enum mlxsw_afk_element mlxsw_sp_acl_tcam_pattern_ipv6[] = {
MLXSW_AFK_ELEMENT_ETHERTYPE,
MLXSW_AFK_ELEMENT_IP_PROTO,
MLXSW_AFK_ELEMENT_SRC_IP_96_127,
MLXSW_AFK_ELEMENT_SRC_IP_64_95,
MLXSW_AFK_ELEMENT_SRC_IP_32_63,
MLXSW_AFK_ELEMENT_SRC_IP_0_31,
MLXSW_AFK_ELEMENT_DST_IP_96_127,
MLXSW_AFK_ELEMENT_DST_IP_64_95,
MLXSW_AFK_ELEMENT_DST_IP_32_63,
MLXSW_AFK_ELEMENT_DST_IP_0_31,
MLXSW_AFK_ELEMENT_DST_L4_PORT,
MLXSW_AFK_ELEMENT_SRC_L4_PORT,
};
static const struct mlxsw_sp_acl_tcam_pattern mlxsw_sp_acl_tcam_patterns[] = {
{
.elements = mlxsw_sp_acl_tcam_pattern_ipv4,
.elements_count = ARRAY_SIZE(mlxsw_sp_acl_tcam_pattern_ipv4),
},
{
.elements = mlxsw_sp_acl_tcam_pattern_ipv6,
.elements_count = ARRAY_SIZE(mlxsw_sp_acl_tcam_pattern_ipv6),
},
};
#define MLXSW_SP_ACL_TCAM_PATTERNS_COUNT \
ARRAY_SIZE(mlxsw_sp_acl_tcam_patterns)
struct mlxsw_sp_acl_tcam_flower_ruleset {
struct mlxsw_sp_acl_tcam_vgroup vgroup;
};
struct mlxsw_sp_acl_tcam_flower_rule {
struct mlxsw_sp_acl_tcam_ventry ventry;
};
static int
mlxsw_sp_acl_tcam_flower_ruleset_add(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_acl_tcam *tcam,
void *ruleset_priv,
struct mlxsw_afk_element_usage *tmplt_elusage)
{
struct mlxsw_sp_acl_tcam_flower_ruleset *ruleset = ruleset_priv;
return mlxsw_sp_acl_tcam_vgroup_add(mlxsw_sp, tcam, &ruleset->vgroup,
mlxsw_sp_acl_tcam_patterns,
MLXSW_SP_ACL_TCAM_PATTERNS_COUNT,
tmplt_elusage, true);
}
static void
mlxsw_sp_acl_tcam_flower_ruleset_del(struct mlxsw_sp *mlxsw_sp,
void *ruleset_priv)
{
struct mlxsw_sp_acl_tcam_flower_ruleset *ruleset = ruleset_priv;
mlxsw_sp_acl_tcam_vgroup_del(&ruleset->vgroup);
}
static int
mlxsw_sp_acl_tcam_flower_ruleset_bind(struct mlxsw_sp *mlxsw_sp,
void *ruleset_priv,
struct mlxsw_sp_port *mlxsw_sp_port,
bool ingress)
{
struct mlxsw_sp_acl_tcam_flower_ruleset *ruleset = ruleset_priv;
return mlxsw_sp_acl_tcam_group_bind(mlxsw_sp, &ruleset->vgroup.group,
mlxsw_sp_port, ingress);
}
static void
mlxsw_sp_acl_tcam_flower_ruleset_unbind(struct mlxsw_sp *mlxsw_sp,
void *ruleset_priv,
struct mlxsw_sp_port *mlxsw_sp_port,
bool ingress)
{
struct mlxsw_sp_acl_tcam_flower_ruleset *ruleset = ruleset_priv;
mlxsw_sp_acl_tcam_group_unbind(mlxsw_sp, &ruleset->vgroup.group,
mlxsw_sp_port, ingress);
}
static u16
mlxsw_sp_acl_tcam_flower_ruleset_group_id(void *ruleset_priv)
{
struct mlxsw_sp_acl_tcam_flower_ruleset *ruleset = ruleset_priv;
return mlxsw_sp_acl_tcam_group_id(&ruleset->vgroup.group);
}
static int
mlxsw_sp_acl_tcam_flower_rule_add(struct mlxsw_sp *mlxsw_sp,
void *ruleset_priv, void *rule_priv,
struct mlxsw_sp_acl_rule_info *rulei)
{
struct mlxsw_sp_acl_tcam_flower_ruleset *ruleset = ruleset_priv;
struct mlxsw_sp_acl_tcam_flower_rule *rule = rule_priv;
return mlxsw_sp_acl_tcam_ventry_add(mlxsw_sp, &ruleset->vgroup,
&rule->ventry, rulei);
}
static void
mlxsw_sp_acl_tcam_flower_rule_del(struct mlxsw_sp *mlxsw_sp, void *rule_priv)
{
struct mlxsw_sp_acl_tcam_flower_rule *rule = rule_priv;
mlxsw_sp_acl_tcam_ventry_del(mlxsw_sp, &rule->ventry);
}
static int
mlxsw_sp_acl_tcam_flower_rule_action_replace(struct mlxsw_sp *mlxsw_sp,
void *rule_priv,
struct mlxsw_sp_acl_rule_info *rulei)
{
return -EOPNOTSUPP;
}
static int
mlxsw_sp_acl_tcam_flower_rule_activity_get(struct mlxsw_sp *mlxsw_sp,
void *rule_priv, bool *activity)
{
struct mlxsw_sp_acl_tcam_flower_rule *rule = rule_priv;
return mlxsw_sp_acl_tcam_ventry_activity_get(mlxsw_sp, &rule->ventry,
activity);
}
static const struct mlxsw_sp_acl_profile_ops mlxsw_sp_acl_tcam_flower_ops = {
.ruleset_priv_size = sizeof(struct mlxsw_sp_acl_tcam_flower_ruleset),
.ruleset_add = mlxsw_sp_acl_tcam_flower_ruleset_add,
.ruleset_del = mlxsw_sp_acl_tcam_flower_ruleset_del,
.ruleset_bind = mlxsw_sp_acl_tcam_flower_ruleset_bind,
.ruleset_unbind = mlxsw_sp_acl_tcam_flower_ruleset_unbind,
.ruleset_group_id = mlxsw_sp_acl_tcam_flower_ruleset_group_id,
.rule_priv_size = sizeof(struct mlxsw_sp_acl_tcam_flower_rule),
.rule_add = mlxsw_sp_acl_tcam_flower_rule_add,
.rule_del = mlxsw_sp_acl_tcam_flower_rule_del,
.rule_action_replace = mlxsw_sp_acl_tcam_flower_rule_action_replace,
.rule_activity_get = mlxsw_sp_acl_tcam_flower_rule_activity_get,
};
struct mlxsw_sp_acl_tcam_mr_ruleset {
struct mlxsw_sp_acl_tcam_vchunk *vchunk;
struct mlxsw_sp_acl_tcam_vgroup vgroup;
};
struct mlxsw_sp_acl_tcam_mr_rule {
struct mlxsw_sp_acl_tcam_ventry ventry;
};
static int
mlxsw_sp_acl_tcam_mr_ruleset_add(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_acl_tcam *tcam,
void *ruleset_priv,
struct mlxsw_afk_element_usage *tmplt_elusage)
{
struct mlxsw_sp_acl_tcam_mr_ruleset *ruleset = ruleset_priv;
int err;
err = mlxsw_sp_acl_tcam_vgroup_add(mlxsw_sp, tcam, &ruleset->vgroup,
mlxsw_sp_acl_tcam_patterns,
MLXSW_SP_ACL_TCAM_PATTERNS_COUNT,
tmplt_elusage, false);
if (err)
return err;
/* For most of the TCAM clients it would make sense to take a tcam chunk
* only when the first rule is written. This is not the case for
* multicast router as it is required to bind the multicast router to a
* specific ACL Group ID which must exist in HW before multicast router
* is initialized.
*/
ruleset->vchunk = mlxsw_sp_acl_tcam_vchunk_get(mlxsw_sp,
&ruleset->vgroup, 1,
tmplt_elusage);
if (IS_ERR(ruleset->vchunk)) {
err = PTR_ERR(ruleset->vchunk);
goto err_chunk_get;
}
return 0;
err_chunk_get:
mlxsw_sp_acl_tcam_vgroup_del(&ruleset->vgroup);
return err;
}
static void
mlxsw_sp_acl_tcam_mr_ruleset_del(struct mlxsw_sp *mlxsw_sp, void *ruleset_priv)
{
struct mlxsw_sp_acl_tcam_mr_ruleset *ruleset = ruleset_priv;
mlxsw_sp_acl_tcam_vchunk_put(mlxsw_sp, ruleset->vchunk);
mlxsw_sp_acl_tcam_vgroup_del(&ruleset->vgroup);
}
static int
mlxsw_sp_acl_tcam_mr_ruleset_bind(struct mlxsw_sp *mlxsw_sp, void *ruleset_priv,
struct mlxsw_sp_port *mlxsw_sp_port,
bool ingress)
{
/* Binding is done when initializing multicast router */
return 0;
}
static void
mlxsw_sp_acl_tcam_mr_ruleset_unbind(struct mlxsw_sp *mlxsw_sp,
void *ruleset_priv,
struct mlxsw_sp_port *mlxsw_sp_port,
bool ingress)
{
}
static u16
mlxsw_sp_acl_tcam_mr_ruleset_group_id(void *ruleset_priv)
{
struct mlxsw_sp_acl_tcam_mr_ruleset *ruleset = ruleset_priv;
return mlxsw_sp_acl_tcam_group_id(&ruleset->vgroup.group);
}
static int
mlxsw_sp_acl_tcam_mr_rule_add(struct mlxsw_sp *mlxsw_sp, void *ruleset_priv,
void *rule_priv,
struct mlxsw_sp_acl_rule_info *rulei)
{
struct mlxsw_sp_acl_tcam_mr_ruleset *ruleset = ruleset_priv;
struct mlxsw_sp_acl_tcam_mr_rule *rule = rule_priv;
return mlxsw_sp_acl_tcam_ventry_add(mlxsw_sp, &ruleset->vgroup,
&rule->ventry, rulei);
}
static void
mlxsw_sp_acl_tcam_mr_rule_del(struct mlxsw_sp *mlxsw_sp, void *rule_priv)
{
struct mlxsw_sp_acl_tcam_mr_rule *rule = rule_priv;
mlxsw_sp_acl_tcam_ventry_del(mlxsw_sp, &rule->ventry);
}
static int
mlxsw_sp_acl_tcam_mr_rule_action_replace(struct mlxsw_sp *mlxsw_sp,
void *rule_priv,
struct mlxsw_sp_acl_rule_info *rulei)
{
struct mlxsw_sp_acl_tcam_mr_rule *rule = rule_priv;
return mlxsw_sp_acl_tcam_ventry_action_replace(mlxsw_sp, &rule->ventry,
rulei);
}
static int
mlxsw_sp_acl_tcam_mr_rule_activity_get(struct mlxsw_sp *mlxsw_sp,
void *rule_priv, bool *activity)
{
struct mlxsw_sp_acl_tcam_mr_rule *rule = rule_priv;
return mlxsw_sp_acl_tcam_ventry_activity_get(mlxsw_sp, &rule->ventry,
activity);
}
static const struct mlxsw_sp_acl_profile_ops mlxsw_sp_acl_tcam_mr_ops = {
.ruleset_priv_size = sizeof(struct mlxsw_sp_acl_tcam_mr_ruleset),
.ruleset_add = mlxsw_sp_acl_tcam_mr_ruleset_add,
.ruleset_del = mlxsw_sp_acl_tcam_mr_ruleset_del,
.ruleset_bind = mlxsw_sp_acl_tcam_mr_ruleset_bind,
.ruleset_unbind = mlxsw_sp_acl_tcam_mr_ruleset_unbind,
.ruleset_group_id = mlxsw_sp_acl_tcam_mr_ruleset_group_id,
.rule_priv_size = sizeof(struct mlxsw_sp_acl_tcam_mr_rule),
.rule_add = mlxsw_sp_acl_tcam_mr_rule_add,
.rule_del = mlxsw_sp_acl_tcam_mr_rule_del,
.rule_action_replace = mlxsw_sp_acl_tcam_mr_rule_action_replace,
.rule_activity_get = mlxsw_sp_acl_tcam_mr_rule_activity_get,
};
static const struct mlxsw_sp_acl_profile_ops *
mlxsw_sp_acl_tcam_profile_ops_arr[] = {
[MLXSW_SP_ACL_PROFILE_FLOWER] = &mlxsw_sp_acl_tcam_flower_ops,
[MLXSW_SP_ACL_PROFILE_MR] = &mlxsw_sp_acl_tcam_mr_ops,
};
const struct mlxsw_sp_acl_profile_ops *
mlxsw_sp_acl_tcam_profile_ops(struct mlxsw_sp *mlxsw_sp,
enum mlxsw_sp_acl_profile profile)
{
const struct mlxsw_sp_acl_profile_ops *ops;
if (WARN_ON(profile >= ARRAY_SIZE(mlxsw_sp_acl_tcam_profile_ops_arr)))
return NULL;
ops = mlxsw_sp_acl_tcam_profile_ops_arr[profile];
if (WARN_ON(!ops))
return NULL;
return ops;
}
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