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Merge branch 'sparx5-port-mirroring'
Daniel Machon says: ==================== net: sparx5: add support for port mirroring This series adds support for port mirroring, and port mirroring stats, through tc matchall action FLOW_ACTION_MIRRED. The hardware has three independent mirroring probes. Each probe can be configured with a separate set of filtering conditions that must be fulfilled before traffic is mirrored. A mirror probe can have up to 64 source ports and a single monitor port. The direction of a mirror probe determines if rx or tx traffic is mirrored from the source port to the monitor port. To: David S. Miller <davem@davemloft.net> To: Eric Dumazet <edumazet@google.com> To: Jakub Kicinski <kuba@kernel.org> To: Paolo Abeni <pabeni@redhat.com> To: Lars Povlsen <lars.povlsen@microchip.com> To: Steen Hegelund <Steen.Hegelund@microchip.com> To: UNGLinuxDriver@microchip.com To: Russell King <linux@armlinux.org.uk> Cc: netdev@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org Cc: Horatiu Vultur <horatiu.vultur@microchip.com> Cc: Russell King (Oracle) <rmk+kernel@armlinux.org.uk> Cc: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Cc: Vladimir Oltean <vladimir.oltean@nxp.com> Cc: Yue Haibing <yuehaibing@huawei.com> --- Changes in v3: - Ditch do_div() (patch #3) to fix warning on hexagon arch, reported by intel bot - Link to v2: https://lore.kernel.org/r/20240418-port-mirroring-v2-0-20642868b386@microchip.com Changes in v2: - Fix clang build warning about uninitialized variable 'err' - Link to v1: https://lore.kernel.org/r/20240418-port-mirroring-v1-0-e05c35007c55@microchip.com ==================== Signed-off-by: Daniel Machon <daniel.machon@microchip.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,235 @@ | ||
| // 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_MIRROR_MONITOR_PORT_DEFAULT 65 | ||
| #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) | ||
| { | ||
| return (u64)spx5_rd(sparx5, ANA_AC_PROBE_PORT_CFG1(idx)) << 32 | | ||
| spx5_rd(sparx5, ANA_AC_PROBE_PORT_CFG(idx)); | ||
| } | ||
|
|
||
| /* Add port to mirror (only front ports) */ | ||
| static void sparx5_mirror_port_add(struct sparx5 *sparx5, u32 idx, u32 portno) | ||
| { | ||
| u32 val, reg = portno; | ||
|
|
||
| reg = portno / BITS_PER_BYTE; | ||
| val = BIT(portno % BITS_PER_BYTE); | ||
|
|
||
| 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) | ||
| { | ||
| u32 val, reg = portno; | ||
|
|
||
| reg = portno / BITS_PER_BYTE; | ||
| val = BIT(portno % BITS_PER_BYTE); | ||
|
|
||
| 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, | ||
| SPX5_MIRROR_MONITOR_PORT_DEFAULT); | ||
| } | ||
|
|
||
| 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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