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git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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e4d505fda6
When doing port mirroring, the physical port to send the frame to, is
written to the FRMC_PORT_VAL field of the QFWD_FRAME_COPY_CFG register.
This field is 7 bits wide on sparx5 and 6 bits wide on lan969x, and has
a default value of 65 and 30, respectively (the number of front ports).
On mirror deletion, we set the default value of the monitor port to
65 for this field, in case no more ports exists for the mirror. Needless
to say, this will not fit the 6 bits on lan969x.
Fix this by correctly using the n_ports constant instead.
Fixes: 3f9e46347a ("net: sparx5: use SPX5_CONST for constants which already have a symbol")
Signed-off-by: Daniel Machon <daniel.machon@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
241 lines
6.2 KiB
C
241 lines
6.2 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/* Microchip Sparx5 Switch driver
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*
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* Copyright (c) 2024 Microchip Technology Inc. and its subsidiaries.
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*/
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#include "sparx5_main.h"
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#include "sparx5_main_regs.h"
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#include "sparx5_tc.h"
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#define SPX5_MIRROR_PROBE_MAX 3
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#define SPX5_MIRROR_DISABLED 0
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#define SPX5_MIRROR_EGRESS 1
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#define SPX5_MIRROR_INGRESS 2
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#define SPX5_QFWD_MP_OFFSET 9 /* Mirror port offset in the QFWD register */
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/* Convert from bool ingress/egress to mirror direction */
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static u32 sparx5_mirror_to_dir(bool ingress)
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{
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return ingress ? SPX5_MIRROR_INGRESS : SPX5_MIRROR_EGRESS;
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}
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/* Get ports belonging to this mirror */
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static u64 sparx5_mirror_port_get(struct sparx5 *sparx5, u32 idx)
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{
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u64 val;
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val = spx5_rd(sparx5, ANA_AC_PROBE_PORT_CFG(idx));
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if (is_sparx5(sparx5))
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val |= (u64)spx5_rd(sparx5, ANA_AC_PROBE_PORT_CFG1(idx)) << 32;
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return val;
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}
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/* Add port to mirror (only front ports) */
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static void sparx5_mirror_port_add(struct sparx5 *sparx5, u32 idx, u32 portno)
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{
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u64 reg = portno;
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u32 val;
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val = BIT(do_div(reg, 32));
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if (reg == 0)
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return spx5_rmw(val, val, sparx5, ANA_AC_PROBE_PORT_CFG(idx));
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else
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return spx5_rmw(val, val, sparx5, ANA_AC_PROBE_PORT_CFG1(idx));
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}
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/* Delete port from mirror (only front ports) */
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static void sparx5_mirror_port_del(struct sparx5 *sparx5, u32 idx, u32 portno)
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{
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u64 reg = portno;
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u32 val;
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val = BIT(do_div(reg, 32));
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if (reg == 0)
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return spx5_rmw(0, val, sparx5, ANA_AC_PROBE_PORT_CFG(idx));
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else
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return spx5_rmw(0, val, sparx5, ANA_AC_PROBE_PORT_CFG1(idx));
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}
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/* Check if mirror contains port */
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static bool sparx5_mirror_contains(struct sparx5 *sparx5, u32 idx, u32 portno)
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{
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return (sparx5_mirror_port_get(sparx5, idx) & BIT_ULL(portno)) != 0;
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}
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/* Check if mirror is empty */
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static bool sparx5_mirror_is_empty(struct sparx5 *sparx5, u32 idx)
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{
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return sparx5_mirror_port_get(sparx5, idx) == 0;
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}
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/* Get direction of mirror */
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static u32 sparx5_mirror_dir_get(struct sparx5 *sparx5, u32 idx)
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{
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u32 val = spx5_rd(sparx5, ANA_AC_PROBE_CFG(idx));
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return ANA_AC_PROBE_CFG_PROBE_DIRECTION_GET(val);
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}
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/* Set direction of mirror */
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static void sparx5_mirror_dir_set(struct sparx5 *sparx5, u32 idx, u32 dir)
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{
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spx5_rmw(ANA_AC_PROBE_CFG_PROBE_DIRECTION_SET(dir),
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ANA_AC_PROBE_CFG_PROBE_DIRECTION, sparx5,
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ANA_AC_PROBE_CFG(idx));
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}
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/* Set the monitor port for this mirror */
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static void sparx5_mirror_monitor_set(struct sparx5 *sparx5, u32 idx,
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u32 portno)
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{
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spx5_rmw(QFWD_FRAME_COPY_CFG_FRMC_PORT_VAL_SET(portno),
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QFWD_FRAME_COPY_CFG_FRMC_PORT_VAL, sparx5,
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QFWD_FRAME_COPY_CFG(idx + SPX5_QFWD_MP_OFFSET));
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}
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/* Get the monitor port of this mirror */
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static u32 sparx5_mirror_monitor_get(struct sparx5 *sparx5, u32 idx)
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{
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u32 val = spx5_rd(sparx5,
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QFWD_FRAME_COPY_CFG(idx + SPX5_QFWD_MP_OFFSET));
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return QFWD_FRAME_COPY_CFG_FRMC_PORT_VAL_GET(val);
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}
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/* Check if port is the monitor port of this mirror */
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static bool sparx5_mirror_has_monitor(struct sparx5 *sparx5, u32 idx,
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u32 portno)
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{
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return sparx5_mirror_monitor_get(sparx5, idx) == portno;
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}
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/* Get a suitable mirror for this port */
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static int sparx5_mirror_get(struct sparx5_port *sport,
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struct sparx5_port *mport, u32 dir, u32 *idx)
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{
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struct sparx5 *sparx5 = sport->sparx5;
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u32 i;
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/* Check if this port is already used as a monitor port */
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for (i = 0; i < SPX5_MIRROR_PROBE_MAX; i++)
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if (sparx5_mirror_has_monitor(sparx5, i, sport->portno))
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return -EINVAL;
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/* Check if existing mirror can be reused
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* (same direction and monitor port).
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*/
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for (i = 0; i < SPX5_MIRROR_PROBE_MAX; i++) {
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if (sparx5_mirror_dir_get(sparx5, i) == dir &&
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sparx5_mirror_has_monitor(sparx5, i, mport->portno)) {
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*idx = i;
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return 0;
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}
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}
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/* Return free mirror */
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for (i = 0; i < SPX5_MIRROR_PROBE_MAX; i++) {
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if (sparx5_mirror_is_empty(sparx5, i)) {
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*idx = i;
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return 0;
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}
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}
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return -ENOENT;
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}
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int sparx5_mirror_add(struct sparx5_mall_entry *entry)
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{
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u32 mirror_idx, dir = sparx5_mirror_to_dir(entry->ingress);
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struct sparx5_port *sport, *mport;
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struct sparx5 *sparx5;
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int err;
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/* Source port */
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sport = entry->port;
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/* monitor port */
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mport = entry->mirror.port;
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sparx5 = sport->sparx5;
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if (sport->portno == mport->portno)
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return -EINVAL;
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err = sparx5_mirror_get(sport, mport, dir, &mirror_idx);
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if (err)
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return err;
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if (sparx5_mirror_contains(sparx5, mirror_idx, sport->portno))
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return -EEXIST;
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/* Add port to mirror */
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sparx5_mirror_port_add(sparx5, mirror_idx, sport->portno);
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/* Set direction of mirror */
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sparx5_mirror_dir_set(sparx5, mirror_idx, dir);
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/* Set monitor port for mirror */
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sparx5_mirror_monitor_set(sparx5, mirror_idx, mport->portno);
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entry->mirror.idx = mirror_idx;
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return 0;
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}
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void sparx5_mirror_del(struct sparx5_mall_entry *entry)
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{
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struct sparx5_port *port = entry->port;
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struct sparx5 *sparx5 = port->sparx5;
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u32 mirror_idx = entry->mirror.idx;
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sparx5_mirror_port_del(sparx5, mirror_idx, port->portno);
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if (!sparx5_mirror_is_empty(sparx5, mirror_idx))
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return;
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sparx5_mirror_dir_set(sparx5, mirror_idx, SPX5_MIRROR_DISABLED);
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sparx5_mirror_monitor_set(sparx5,
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mirror_idx,
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sparx5->data->consts->n_ports);
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}
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void sparx5_mirror_stats(struct sparx5_mall_entry *entry,
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struct flow_stats *fstats)
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{
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struct sparx5_port *port = entry->port;
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struct rtnl_link_stats64 new_stats;
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struct flow_stats *old_stats;
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old_stats = &entry->port->mirror_stats;
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sparx5_get_stats64(port->ndev, &new_stats);
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if (entry->ingress) {
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flow_stats_update(fstats,
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new_stats.rx_bytes - old_stats->bytes,
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new_stats.rx_packets - old_stats->pkts,
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new_stats.rx_dropped - old_stats->drops,
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old_stats->lastused,
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FLOW_ACTION_HW_STATS_IMMEDIATE);
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old_stats->bytes = new_stats.rx_bytes;
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old_stats->pkts = new_stats.rx_packets;
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old_stats->drops = new_stats.rx_dropped;
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old_stats->lastused = jiffies;
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} else {
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flow_stats_update(fstats,
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new_stats.tx_bytes - old_stats->bytes,
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new_stats.tx_packets - old_stats->pkts,
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new_stats.tx_dropped - old_stats->drops,
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old_stats->lastused,
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FLOW_ACTION_HW_STATS_IMMEDIATE);
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old_stats->bytes = new_stats.tx_bytes;
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old_stats->pkts = new_stats.tx_packets;
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old_stats->drops = new_stats.tx_dropped;
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old_stats->lastused = jiffies;
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}
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}
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