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// SPDX-License-Identifier: GPL-2.0+
/* Microchip Sparx5 Switch driver
*
* Copyright (c) 2024 Microchip Technology Inc. and its subsidiaries.
*/
#include "sparx5_main.h"
#include "sparx5_main_regs.h"
#include "sparx5_tc.h"
#define SPX5_MIRROR_PROBE_MAX 3
#define SPX5_MIRROR_DISABLED 0
#define SPX5_MIRROR_EGRESS 1
#define SPX5_MIRROR_INGRESS 2
#define SPX5_QFWD_MP_OFFSET 9 /* Mirror port offset in the QFWD register */
/* Convert from bool ingress/egress to mirror direction */
static u32 sparx5_mirror_to_dir(bool ingress)
{
return ingress ? SPX5_MIRROR_INGRESS : SPX5_MIRROR_EGRESS;
}
/* Get ports belonging to this mirror */
static u64 sparx5_mirror_port_get(struct sparx5 *sparx5, u32 idx)
{
u64 val;
val = spx5_rd(sparx5, ANA_AC_PROBE_PORT_CFG(idx));
if (is_sparx5(sparx5))
val |= (u64)spx5_rd(sparx5, ANA_AC_PROBE_PORT_CFG1(idx)) << 32;
return val;
}
/* Add port to mirror (only front ports) */
static void sparx5_mirror_port_add(struct sparx5 *sparx5, u32 idx, u32 portno)
{
u64 reg = portno;
u32 val;
val = BIT(do_div(reg, 32));
if (reg == 0)
return spx5_rmw(val, val, sparx5, ANA_AC_PROBE_PORT_CFG(idx));
else
return spx5_rmw(val, val, sparx5, ANA_AC_PROBE_PORT_CFG1(idx));
}
/* Delete port from mirror (only front ports) */
static void sparx5_mirror_port_del(struct sparx5 *sparx5, u32 idx, u32 portno)
{
u64 reg = portno;
u32 val;
val = BIT(do_div(reg, 32));
if (reg == 0)
return spx5_rmw(0, val, sparx5, ANA_AC_PROBE_PORT_CFG(idx));
else
return spx5_rmw(0, val, sparx5, ANA_AC_PROBE_PORT_CFG1(idx));
}
/* Check if mirror contains port */
static bool sparx5_mirror_contains(struct sparx5 *sparx5, u32 idx, u32 portno)
{
return (sparx5_mirror_port_get(sparx5, idx) & BIT_ULL(portno)) != 0;
}
/* Check if mirror is empty */
static bool sparx5_mirror_is_empty(struct sparx5 *sparx5, u32 idx)
{
return sparx5_mirror_port_get(sparx5, idx) == 0;
}
/* Get direction of mirror */
static u32 sparx5_mirror_dir_get(struct sparx5 *sparx5, u32 idx)
{
u32 val = spx5_rd(sparx5, ANA_AC_PROBE_CFG(idx));
return ANA_AC_PROBE_CFG_PROBE_DIRECTION_GET(val);
}
/* Set direction of mirror */
static void sparx5_mirror_dir_set(struct sparx5 *sparx5, u32 idx, u32 dir)
{
spx5_rmw(ANA_AC_PROBE_CFG_PROBE_DIRECTION_SET(dir),
ANA_AC_PROBE_CFG_PROBE_DIRECTION, sparx5,
ANA_AC_PROBE_CFG(idx));
}
/* Set the monitor port for this mirror */
static void sparx5_mirror_monitor_set(struct sparx5 *sparx5, u32 idx,
u32 portno)
{
spx5_rmw(QFWD_FRAME_COPY_CFG_FRMC_PORT_VAL_SET(portno),
QFWD_FRAME_COPY_CFG_FRMC_PORT_VAL, sparx5,
QFWD_FRAME_COPY_CFG(idx + SPX5_QFWD_MP_OFFSET));
}
/* Get the monitor port of this mirror */
static u32 sparx5_mirror_monitor_get(struct sparx5 *sparx5, u32 idx)
{
u32 val = spx5_rd(sparx5,
QFWD_FRAME_COPY_CFG(idx + SPX5_QFWD_MP_OFFSET));
return QFWD_FRAME_COPY_CFG_FRMC_PORT_VAL_GET(val);
}
/* Check if port is the monitor port of this mirror */
static bool sparx5_mirror_has_monitor(struct sparx5 *sparx5, u32 idx,
u32 portno)
{
return sparx5_mirror_monitor_get(sparx5, idx) == portno;
}
/* Get a suitable mirror for this port */
static int sparx5_mirror_get(struct sparx5_port *sport,
struct sparx5_port *mport, u32 dir, u32 *idx)
{
struct sparx5 *sparx5 = sport->sparx5;
u32 i;
/* Check if this port is already used as a monitor port */
for (i = 0; i < SPX5_MIRROR_PROBE_MAX; i++)
if (sparx5_mirror_has_monitor(sparx5, i, sport->portno))
return -EINVAL;
/* Check if existing mirror can be reused
* (same direction and monitor port).
*/
for (i = 0; i < SPX5_MIRROR_PROBE_MAX; i++) {
if (sparx5_mirror_dir_get(sparx5, i) == dir &&
sparx5_mirror_has_monitor(sparx5, i, mport->portno)) {
*idx = i;
return 0;
}
}
/* Return free mirror */
for (i = 0; i < SPX5_MIRROR_PROBE_MAX; i++) {
if (sparx5_mirror_is_empty(sparx5, i)) {
*idx = i;
return 0;
}
}
return -ENOENT;
}
int sparx5_mirror_add(struct sparx5_mall_entry *entry)
{
u32 mirror_idx, dir = sparx5_mirror_to_dir(entry->ingress);
struct sparx5_port *sport, *mport;
struct sparx5 *sparx5;
int err;
/* Source port */
sport = entry->port;
/* monitor port */
mport = entry->mirror.port;
sparx5 = sport->sparx5;
if (sport->portno == mport->portno)
return -EINVAL;
err = sparx5_mirror_get(sport, mport, dir, &mirror_idx);
if (err)
return err;
if (sparx5_mirror_contains(sparx5, mirror_idx, sport->portno))
return -EEXIST;
/* Add port to mirror */
sparx5_mirror_port_add(sparx5, mirror_idx, sport->portno);
/* Set direction of mirror */
sparx5_mirror_dir_set(sparx5, mirror_idx, dir);
/* Set monitor port for mirror */
sparx5_mirror_monitor_set(sparx5, mirror_idx, mport->portno);
entry->mirror.idx = mirror_idx;
return 0;
}
void sparx5_mirror_del(struct sparx5_mall_entry *entry)
{
struct sparx5_port *port = entry->port;
struct sparx5 *sparx5 = port->sparx5;
u32 mirror_idx = entry->mirror.idx;
sparx5_mirror_port_del(sparx5, mirror_idx, port->portno);
if (!sparx5_mirror_is_empty(sparx5, mirror_idx))
return;
sparx5_mirror_dir_set(sparx5, mirror_idx, SPX5_MIRROR_DISABLED);
sparx5_mirror_monitor_set(sparx5,
mirror_idx,
sparx5->data->consts->n_ports);
}
void sparx5_mirror_stats(struct sparx5_mall_entry *entry,
struct flow_stats *fstats)
{
struct sparx5_port *port = entry->port;
struct rtnl_link_stats64 new_stats;
struct flow_stats *old_stats;
old_stats = &entry->port->mirror_stats;
sparx5_get_stats64(port->ndev, &new_stats);
if (entry->ingress) {
flow_stats_update(fstats,
new_stats.rx_bytes - old_stats->bytes,
new_stats.rx_packets - old_stats->pkts,
new_stats.rx_dropped - old_stats->drops,
old_stats->lastused,
FLOW_ACTION_HW_STATS_IMMEDIATE);
old_stats->bytes = new_stats.rx_bytes;
old_stats->pkts = new_stats.rx_packets;
old_stats->drops = new_stats.rx_dropped;
old_stats->lastused = jiffies;
} else {
flow_stats_update(fstats,
new_stats.tx_bytes - old_stats->bytes,
new_stats.tx_packets - old_stats->pkts,
new_stats.tx_dropped - old_stats->drops,
old_stats->lastused,
FLOW_ACTION_HW_STATS_IMMEDIATE);
old_stats->bytes = new_stats.tx_bytes;
old_stats->pkts = new_stats.tx_packets;
old_stats->drops = new_stats.tx_dropped;
old_stats->lastused = jiffies;
}
}
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