#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/netdevice.h>
#include <net/flow_offload.h>
#include "spectrum.h"
#include "spectrum_span.h"
#include "reg.h"
static struct mlxsw_sp_mall_entry *
mlxsw_sp_mall_entry_find(struct mlxsw_sp_flow_block *block, unsigned long cookie)
{
struct mlxsw_sp_mall_entry *mall_entry;
list_for_each_entry(mall_entry, &block->mall.list, list)
if (mall_entry->cookie == cookie)
return mall_entry;
return NULL;
}
static int
mlxsw_sp_mall_port_mirror_add(struct mlxsw_sp_port *mlxsw_sp_port,
struct mlxsw_sp_mall_entry *mall_entry,
struct netlink_ext_ack *extack)
{
struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
struct mlxsw_sp_span_agent_parms agent_parms = {};
struct mlxsw_sp_span_trigger_parms parms;
enum mlxsw_sp_span_trigger trigger;
int err;
if (!mall_entry->mirror.to_dev) {
NL_SET_ERR_MSG(extack, "Could not find requested device");
return -EINVAL;
}
agent_parms.to_dev = mall_entry->mirror.to_dev;
err = mlxsw_sp_span_agent_get(mlxsw_sp, &mall_entry->mirror.span_id,
&agent_parms);
if (err) {
NL_SET_ERR_MSG(extack, "Failed to get SPAN agent");
return err;
}
err = mlxsw_sp_span_analyzed_port_get(mlxsw_sp_port,
mall_entry->ingress);
if (err) {
NL_SET_ERR_MSG(extack, "Failed to get analyzed port");
goto err_analyzed_port_get;
}
trigger = mall_entry->ingress ? MLXSW_SP_SPAN_TRIGGER_INGRESS :
MLXSW_SP_SPAN_TRIGGER_EGRESS;
parms.span_id = mall_entry->mirror.span_id;
parms.probability_rate = 1;
err = mlxsw_sp_span_agent_bind(mlxsw_sp, trigger, mlxsw_sp_port,
&parms);
if (err) {
NL_SET_ERR_MSG(extack, "Failed to bind SPAN agent");
goto err_agent_bind;
}
return 0;
err_agent_bind:
mlxsw_sp_span_analyzed_port_put(mlxsw_sp_port, mall_entry->ingress);
err_analyzed_port_get:
mlxsw_sp_span_agent_put(mlxsw_sp, mall_entry->mirror.span_id);
return err;
}
static void
mlxsw_sp_mall_port_mirror_del(struct mlxsw_sp_port *mlxsw_sp_port,
struct mlxsw_sp_mall_entry *mall_entry)
{
struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
struct mlxsw_sp_span_trigger_parms parms;
enum mlxsw_sp_span_trigger trigger;
trigger = mall_entry->ingress ? MLXSW_SP_SPAN_TRIGGER_INGRESS :
MLXSW_SP_SPAN_TRIGGER_EGRESS;
parms.span_id = mall_entry->mirror.span_id;
mlxsw_sp_span_agent_unbind(mlxsw_sp, trigger, mlxsw_sp_port, &parms);
mlxsw_sp_span_analyzed_port_put(mlxsw_sp_port, mall_entry->ingress);
mlxsw_sp_span_agent_put(mlxsw_sp, mall_entry->mirror.span_id);
}
static int mlxsw_sp_mall_port_sample_set(struct mlxsw_sp_port *mlxsw_sp_port,
bool enable, u32 rate)
{
struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
char mpsc_pl[MLXSW_REG_MPSC_LEN];
mlxsw_reg_mpsc_pack(mpsc_pl, mlxsw_sp_port->local_port, enable, rate);
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(mpsc), mpsc_pl);
}
static int
mlxsw_sp_mall_port_sample_add(struct mlxsw_sp_port *mlxsw_sp_port,
struct mlxsw_sp_mall_entry *mall_entry,
struct netlink_ext_ack *extack)
{
struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
struct mlxsw_sp_sample_trigger trigger;
int err;
if (mall_entry->ingress)
trigger.type = MLXSW_SP_SAMPLE_TRIGGER_TYPE_INGRESS;
else
trigger.type = MLXSW_SP_SAMPLE_TRIGGER_TYPE_EGRESS;
trigger.local_port = mlxsw_sp_port->local_port;
err = mlxsw_sp_sample_trigger_params_set(mlxsw_sp, &trigger,
&mall_entry->sample.params,
extack);
if (err)
return err;
err = mlxsw_sp->mall_ops->sample_add(mlxsw_sp, mlxsw_sp_port,
mall_entry, extack);
if (err)
goto err_port_sample_set;
return 0;
err_port_sample_set:
mlxsw_sp_sample_trigger_params_unset(mlxsw_sp, &trigger);
return err;
}
static void
mlxsw_sp_mall_port_sample_del(struct mlxsw_sp_port *mlxsw_sp_port,
struct mlxsw_sp_mall_entry *mall_entry)
{
struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
struct mlxsw_sp_sample_trigger trigger;
if (mall_entry->ingress)
trigger.type = MLXSW_SP_SAMPLE_TRIGGER_TYPE_INGRESS;
else
trigger.type = MLXSW_SP_SAMPLE_TRIGGER_TYPE_EGRESS;
trigger.local_port = mlxsw_sp_port->local_port;
mlxsw_sp->mall_ops->sample_del(mlxsw_sp, mlxsw_sp_port, mall_entry);
mlxsw_sp_sample_trigger_params_unset(mlxsw_sp, &trigger);
}
static int
mlxsw_sp_mall_port_rule_add(struct mlxsw_sp_port *mlxsw_sp_port,
struct mlxsw_sp_mall_entry *mall_entry,
struct netlink_ext_ack *extack)
{
switch (mall_entry->type) {
case MLXSW_SP_MALL_ACTION_TYPE_MIRROR:
return mlxsw_sp_mall_port_mirror_add(mlxsw_sp_port, mall_entry,
extack);
case MLXSW_SP_MALL_ACTION_TYPE_SAMPLE:
return mlxsw_sp_mall_port_sample_add(mlxsw_sp_port, mall_entry,
extack);
default:
WARN_ON(1);
return -EINVAL;
}
}
static void
mlxsw_sp_mall_port_rule_del(struct mlxsw_sp_port *mlxsw_sp_port,
struct mlxsw_sp_mall_entry *mall_entry)
{
switch (mall_entry->type) {
case MLXSW_SP_MALL_ACTION_TYPE_MIRROR:
mlxsw_sp_mall_port_mirror_del(mlxsw_sp_port, mall_entry);
break;
case MLXSW_SP_MALL_ACTION_TYPE_SAMPLE:
mlxsw_sp_mall_port_sample_del(mlxsw_sp_port, mall_entry);
break;
default:
WARN_ON(1);
}
}
static void mlxsw_sp_mall_prio_update(struct mlxsw_sp_flow_block *block)
{
struct mlxsw_sp_mall_entry *mall_entry;
if (list_empty(&block->mall.list))
return;
block->mall.min_prio = UINT_MAX;
block->mall.max_prio = 0;
list_for_each_entry(mall_entry, &block->mall.list, list) {
if (mall_entry->priority < block->mall.min_prio)
block->mall.min_prio = mall_entry->priority;
if (mall_entry->priority > block->mall.max_prio)
block->mall.max_prio = mall_entry->priority;
}
}
int mlxsw_sp_mall_replace(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_flow_block *block,
struct tc_cls_matchall_offload *f)
{
struct mlxsw_sp_flow_block_binding *binding;
struct mlxsw_sp_mall_entry *mall_entry;
__be16 protocol = f->common.protocol;
struct flow_action_entry *act;
unsigned int flower_min_prio;
unsigned int flower_max_prio;
bool flower_prio_valid;
int err;
if (!flow_offload_has_one_action(&f->rule->action)) {
NL_SET_ERR_MSG(f->common.extack, "Only singular actions are supported");
return -EOPNOTSUPP;
}
if (f->common.chain_index) {
NL_SET_ERR_MSG(f->common.extack, "Only chain 0 is supported");
return -EOPNOTSUPP;
}
if (mlxsw_sp_flow_block_is_mixed_bound(block)) {
NL_SET_ERR_MSG(f->common.extack, "Only not mixed bound blocks are supported");
return -EOPNOTSUPP;
}
err = mlxsw_sp_flower_prio_get(mlxsw_sp, block, f->common.chain_index,
&flower_min_prio, &flower_max_prio);
if (err) {
if (err != -ENOENT) {
NL_SET_ERR_MSG(f->common.extack, "Failed to get flower priorities");
return err;
}
flower_prio_valid = false;
} else {
flower_prio_valid = true;
}
if (protocol != htons(ETH_P_ALL)) {
NL_SET_ERR_MSG(f->common.extack, "matchall rules only supported with 'all' protocol");
return -EOPNOTSUPP;
}
mall_entry = kzalloc_obj(*mall_entry);
if (!mall_entry)
return -ENOMEM;
mall_entry->cookie = f->cookie;
mall_entry->priority = f->common.prio;
mall_entry->ingress = mlxsw_sp_flow_block_is_ingress_bound(block);
if (flower_prio_valid && mall_entry->ingress &&
mall_entry->priority >= flower_min_prio) {
NL_SET_ERR_MSG(f->common.extack, "Failed to add behind existing flower rules");
err = -EOPNOTSUPP;
goto errout;
}
if (flower_prio_valid && !mall_entry->ingress &&
mall_entry->priority <= flower_max_prio) {
NL_SET_ERR_MSG(f->common.extack, "Failed to add in front of existing flower rules");
err = -EOPNOTSUPP;
goto errout;
}
act = &f->rule->action.entries[0];
switch (act->id) {
case FLOW_ACTION_MIRRED:
mall_entry->type = MLXSW_SP_MALL_ACTION_TYPE_MIRROR;
mall_entry->mirror.to_dev = act->dev;
break;
case FLOW_ACTION_SAMPLE:
mall_entry->type = MLXSW_SP_MALL_ACTION_TYPE_SAMPLE;
mall_entry->sample.params.psample_group = act->sample.psample_group;
mall_entry->sample.params.truncate = act->sample.truncate;
mall_entry->sample.params.trunc_size = act->sample.trunc_size;
mall_entry->sample.params.rate = act->sample.rate;
break;
default:
err = -EOPNOTSUPP;
goto errout;
}
list_for_each_entry(binding, &block->binding_list, list) {
err = mlxsw_sp_mall_port_rule_add(binding->mlxsw_sp_port,
mall_entry, f->common.extack);
if (err)
goto rollback;
}
block->rule_count++;
if (mall_entry->ingress)
block->egress_blocker_rule_count++;
else
block->ingress_blocker_rule_count++;
list_add_tail(&mall_entry->list, &block->mall.list);
mlxsw_sp_mall_prio_update(block);
return 0;
rollback:
list_for_each_entry_continue_reverse(binding, &block->binding_list,
list)
mlxsw_sp_mall_port_rule_del(binding->mlxsw_sp_port, mall_entry);
errout:
kfree(mall_entry);
return err;
}
void mlxsw_sp_mall_destroy(struct mlxsw_sp_flow_block *block,
struct tc_cls_matchall_offload *f)
{
struct mlxsw_sp_flow_block_binding *binding;
struct mlxsw_sp_mall_entry *mall_entry;
mall_entry = mlxsw_sp_mall_entry_find(block, f->cookie);
if (!mall_entry) {
NL_SET_ERR_MSG(f->common.extack, "Entry not found");
return;
}
list_del(&mall_entry->list);
if (mall_entry->ingress)
block->egress_blocker_rule_count--;
else
block->ingress_blocker_rule_count--;
block->rule_count--;
list_for_each_entry(binding, &block->binding_list, list)
mlxsw_sp_mall_port_rule_del(binding->mlxsw_sp_port, mall_entry);
kfree_rcu(mall_entry, rcu);
mlxsw_sp_mall_prio_update(block);
}
int mlxsw_sp_mall_port_bind(struct mlxsw_sp_flow_block *block,
struct mlxsw_sp_port *mlxsw_sp_port,
struct netlink_ext_ack *extack)
{
struct mlxsw_sp_mall_entry *mall_entry;
int err;
list_for_each_entry(mall_entry, &block->mall.list, list) {
err = mlxsw_sp_mall_port_rule_add(mlxsw_sp_port, mall_entry,
extack);
if (err)
goto rollback;
}
return 0;
rollback:
list_for_each_entry_continue_reverse(mall_entry, &block->mall.list,
list)
mlxsw_sp_mall_port_rule_del(mlxsw_sp_port, mall_entry);
return err;
}
void mlxsw_sp_mall_port_unbind(struct mlxsw_sp_flow_block *block,
struct mlxsw_sp_port *mlxsw_sp_port)
{
struct mlxsw_sp_mall_entry *mall_entry;
list_for_each_entry(mall_entry, &block->mall.list, list)
mlxsw_sp_mall_port_rule_del(mlxsw_sp_port, mall_entry);
}
int mlxsw_sp_mall_prio_get(struct mlxsw_sp_flow_block *block, u32 chain_index,
unsigned int *p_min_prio, unsigned int *p_max_prio)
{
if (chain_index || list_empty(&block->mall.list))
return -ENOENT;
*p_min_prio = block->mall.min_prio;
*p_max_prio = block->mall.max_prio;
return 0;
}
static int mlxsw_sp1_mall_sample_add(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_port *mlxsw_sp_port,
struct mlxsw_sp_mall_entry *mall_entry,
struct netlink_ext_ack *extack)
{
u32 rate = mall_entry->sample.params.rate;
if (!mall_entry->ingress) {
NL_SET_ERR_MSG(extack, "Sampling is not supported on egress");
return -EOPNOTSUPP;
}
if (rate > MLXSW_REG_MPSC_RATE_MAX) {
NL_SET_ERR_MSG(extack, "Unsupported sampling rate");
return -EOPNOTSUPP;
}
return mlxsw_sp_mall_port_sample_set(mlxsw_sp_port, true, rate);
}
static void mlxsw_sp1_mall_sample_del(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_port *mlxsw_sp_port,
struct mlxsw_sp_mall_entry *mall_entry)
{
mlxsw_sp_mall_port_sample_set(mlxsw_sp_port, false, 1);
}
const struct mlxsw_sp_mall_ops mlxsw_sp1_mall_ops = {
.sample_add = mlxsw_sp1_mall_sample_add,
.sample_del = mlxsw_sp1_mall_sample_del,
};
static int mlxsw_sp2_mall_sample_add(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_port *mlxsw_sp_port,
struct mlxsw_sp_mall_entry *mall_entry,
struct netlink_ext_ack *extack)
{
struct mlxsw_sp_span_trigger_parms trigger_parms = {};
struct mlxsw_sp_span_agent_parms agent_parms = {
.to_dev = NULL,
.session_id = MLXSW_SP_SPAN_SESSION_ID_SAMPLING,
};
u32 rate = mall_entry->sample.params.rate;
enum mlxsw_sp_span_trigger span_trigger;
int err;
err = mlxsw_sp_span_agent_get(mlxsw_sp, &mall_entry->sample.span_id,
&agent_parms);
if (err) {
NL_SET_ERR_MSG(extack, "Failed to get SPAN agent");
return err;
}
err = mlxsw_sp_span_analyzed_port_get(mlxsw_sp_port,
mall_entry->ingress);
if (err) {
NL_SET_ERR_MSG(extack, "Failed to get analyzed port");
goto err_analyzed_port_get;
}
span_trigger = mall_entry->ingress ? MLXSW_SP_SPAN_TRIGGER_INGRESS :
MLXSW_SP_SPAN_TRIGGER_EGRESS;
trigger_parms.span_id = mall_entry->sample.span_id;
trigger_parms.probability_rate = rate;
err = mlxsw_sp_span_agent_bind(mlxsw_sp, span_trigger, mlxsw_sp_port,
&trigger_parms);
if (err) {
NL_SET_ERR_MSG(extack, "Failed to bind SPAN agent");
goto err_agent_bind;
}
return 0;
err_agent_bind:
mlxsw_sp_span_analyzed_port_put(mlxsw_sp_port, mall_entry->ingress);
err_analyzed_port_get:
mlxsw_sp_span_agent_put(mlxsw_sp, mall_entry->sample.span_id);
return err;
}
static void mlxsw_sp2_mall_sample_del(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_port *mlxsw_sp_port,
struct mlxsw_sp_mall_entry *mall_entry)
{
struct mlxsw_sp_span_trigger_parms trigger_parms = {};
enum mlxsw_sp_span_trigger span_trigger;
span_trigger = mall_entry->ingress ? MLXSW_SP_SPAN_TRIGGER_INGRESS :
MLXSW_SP_SPAN_TRIGGER_EGRESS;
trigger_parms.span_id = mall_entry->sample.span_id;
mlxsw_sp_span_agent_unbind(mlxsw_sp, span_trigger, mlxsw_sp_port,
&trigger_parms);
mlxsw_sp_span_analyzed_port_put(mlxsw_sp_port, mall_entry->ingress);
mlxsw_sp_span_agent_put(mlxsw_sp, mall_entry->sample.span_id);
}
const struct mlxsw_sp_mall_ops mlxsw_sp2_mall_ops = {
.sample_add = mlxsw_sp2_mall_sample_add,
.sample_del = mlxsw_sp2_mall_sample_del,
};
