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Message-ID: <20190528124917.22034-2-joergen.andreasen@microchip.com>
Date: Tue, 28 May 2019 14:49:17 +0200
From: Joergen Andreasen <joergen.andreasen@...rochip.com>
To: <netdev@...r.kernel.org>
CC: Joergen Andreasen <joergen.andreasen@...rochip.com>,
"Microchip Linux Driver Support" <UNGLinuxDriver@...rochip.com>,
Alexandre Belloni <alexandre.belloni@...tlin.com>,
"David S. Miller" <davem@...emloft.net>,
<linux-kernel@...r.kernel.org>
Subject: [PATCH net-next v3 1/1] net: mscc: ocelot: Implement port policers via tc command
Hardware offload of matchall classifier and police action are now
supported via the tc command.
Supported police parameters are: rate and burst.
Example:
Add:
tc qdisc add dev eth3 handle ffff: ingress
tc filter add dev eth3 parent ffff: prio 1 handle 2 \
matchall skip_sw \
action police rate 100Mbit burst 10000
Show:
tc -s -d qdisc show dev eth3
tc -s -d filter show dev eth3 ingress
Delete:
tc filter del dev eth3 parent ffff: prio 1
tc qdisc del dev eth3 handle ffff: ingress
Signed-off-by: Joergen Andreasen <joergen.andreasen@...rochip.com>
---
drivers/net/ethernet/mscc/Makefile | 2 +-
drivers/net/ethernet/mscc/ocelot.c | 13 +-
drivers/net/ethernet/mscc/ocelot.h | 3 +
drivers/net/ethernet/mscc/ocelot_police.c | 227 ++++++++++++++++++++++
drivers/net/ethernet/mscc/ocelot_police.h | 22 +++
drivers/net/ethernet/mscc/ocelot_tc.c | 174 +++++++++++++++++
drivers/net/ethernet/mscc/ocelot_tc.h | 22 +++
7 files changed, 460 insertions(+), 3 deletions(-)
create mode 100644 drivers/net/ethernet/mscc/ocelot_police.c
create mode 100644 drivers/net/ethernet/mscc/ocelot_police.h
create mode 100644 drivers/net/ethernet/mscc/ocelot_tc.c
create mode 100644 drivers/net/ethernet/mscc/ocelot_tc.h
diff --git a/drivers/net/ethernet/mscc/Makefile b/drivers/net/ethernet/mscc/Makefile
index cb52a3b128ae..5e694dc1f7f8 100644
--- a/drivers/net/ethernet/mscc/Makefile
+++ b/drivers/net/ethernet/mscc/Makefile
@@ -1,5 +1,5 @@
# SPDX-License-Identifier: (GPL-2.0 OR MIT)
obj-$(CONFIG_MSCC_OCELOT_SWITCH) += mscc_ocelot_common.o
mscc_ocelot_common-y := ocelot.o ocelot_io.o
-mscc_ocelot_common-y += ocelot_regs.o
+mscc_ocelot_common-y += ocelot_regs.o ocelot_tc.o ocelot_police.o
obj-$(CONFIG_MSCC_OCELOT_SWITCH_OCELOT) += ocelot_board.o
diff --git a/drivers/net/ethernet/mscc/ocelot.c b/drivers/net/ethernet/mscc/ocelot.c
index d715ef4fc92f..ab7d9eba6a32 100644
--- a/drivers/net/ethernet/mscc/ocelot.c
+++ b/drivers/net/ethernet/mscc/ocelot.c
@@ -910,6 +910,13 @@ static int ocelot_set_features(struct net_device *dev,
struct ocelot_port *port = netdev_priv(dev);
netdev_features_t changed = dev->features ^ features;
+ if ((dev->features & NETIF_F_HW_TC) > (features & NETIF_F_HW_TC) &&
+ port->tc.offload_cnt) {
+ netdev_err(dev,
+ "Cannot disable HW TC offload while offloads active\n");
+ return -EBUSY;
+ }
+
if (changed & NETIF_F_HW_VLAN_CTAG_FILTER)
ocelot_vlan_mode(port, features);
@@ -943,6 +950,7 @@ static const struct net_device_ops ocelot_port_netdev_ops = {
.ndo_vlan_rx_kill_vid = ocelot_vlan_rx_kill_vid,
.ndo_set_features = ocelot_set_features,
.ndo_get_port_parent_id = ocelot_get_port_parent_id,
+ .ndo_setup_tc = ocelot_setup_tc,
};
static void ocelot_get_strings(struct net_device *netdev, u32 sset, u8 *data)
@@ -1663,8 +1671,9 @@ int ocelot_probe_port(struct ocelot *ocelot, u8 port,
dev->netdev_ops = &ocelot_port_netdev_ops;
dev->ethtool_ops = &ocelot_ethtool_ops;
- dev->hw_features |= NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_RXFCS;
- dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
+ dev->hw_features |= NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_RXFCS |
+ NETIF_F_HW_TC;
+ dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_TC;
memcpy(dev->dev_addr, ocelot->base_mac, ETH_ALEN);
dev->dev_addr[ETH_ALEN - 1] += port;
diff --git a/drivers/net/ethernet/mscc/ocelot.h b/drivers/net/ethernet/mscc/ocelot.h
index ba3b3380b4d0..9514979fa075 100644
--- a/drivers/net/ethernet/mscc/ocelot.h
+++ b/drivers/net/ethernet/mscc/ocelot.h
@@ -22,6 +22,7 @@
#include "ocelot_rew.h"
#include "ocelot_sys.h"
#include "ocelot_qs.h"
+#include "ocelot_tc.h"
#define PGID_AGGR 64
#define PGID_SRC 80
@@ -458,6 +459,8 @@ struct ocelot_port {
phy_interface_t phy_mode;
struct phy *serdes;
+
+ struct ocelot_port_tc tc;
};
u32 __ocelot_read_ix(struct ocelot *ocelot, u32 reg, u32 offset);
diff --git a/drivers/net/ethernet/mscc/ocelot_police.c b/drivers/net/ethernet/mscc/ocelot_police.c
new file mode 100644
index 000000000000..701e82dd749a
--- /dev/null
+++ b/drivers/net/ethernet/mscc/ocelot_police.c
@@ -0,0 +1,227 @@
+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+/* Microsemi Ocelot Switch driver
+ *
+ * Copyright (c) 2019 Microsemi Corporation
+ */
+
+#include "ocelot_police.h"
+
+enum mscc_qos_rate_mode {
+ MSCC_QOS_RATE_MODE_DISABLED, /* Policer/shaper disabled */
+ MSCC_QOS_RATE_MODE_LINE, /* Measure line rate in kbps incl. IPG */
+ MSCC_QOS_RATE_MODE_DATA, /* Measures data rate in kbps excl. IPG */
+ MSCC_QOS_RATE_MODE_FRAME, /* Measures frame rate in fps */
+ __MSCC_QOS_RATE_MODE_END,
+ NUM_MSCC_QOS_RATE_MODE = __MSCC_QOS_RATE_MODE_END,
+ MSCC_QOS_RATE_MODE_MAX = __MSCC_QOS_RATE_MODE_END - 1,
+};
+
+/* Types for ANA:POL[0-192]:POL_MODE_CFG.FRM_MODE */
+#define POL_MODE_LINERATE 0 /* Incl IPG. Unit: 33 1/3 kbps, 4096 bytes */
+#define POL_MODE_DATARATE 1 /* Excl IPG. Unit: 33 1/3 kbps, 4096 bytes */
+#define POL_MODE_FRMRATE_HI 2 /* Unit: 33 1/3 fps, 32.8 frames */
+#define POL_MODE_FRMRATE_LO 3 /* Unit: 1/3 fps, 0.3 frames */
+
+/* Policer indexes */
+#define POL_IX_PORT 0 /* 0-11 : Port policers */
+#define POL_IX_QUEUE 32 /* 32-127 : Queue policers */
+
+/* Default policer order */
+#define POL_ORDER 0x1d3 /* Ocelot policer order: Serial (QoS -> Port -> VCAP) */
+
+struct qos_policer_conf {
+ enum mscc_qos_rate_mode mode;
+ bool dlb; /* Enable DLB (dual leaky bucket mode */
+ bool cf; /* Coupling flag (ignored in SLB mode) */
+ u32 cir; /* CIR in kbps/fps (ignored in SLB mode) */
+ u32 cbs; /* CBS in bytes/frames (ignored in SLB mode) */
+ u32 pir; /* PIR in kbps/fps */
+ u32 pbs; /* PBS in bytes/frames */
+ u8 ipg; /* Size of IPG when MSCC_QOS_RATE_MODE_LINE is chosen */
+};
+
+static int qos_policer_conf_set(struct ocelot_port *port, u32 pol_ix,
+ struct qos_policer_conf *conf)
+{
+ u32 cf = 0, cir_ena = 0, frm_mode = POL_MODE_LINERATE;
+ u32 cir = 0, cbs = 0, pir = 0, pbs = 0;
+ bool cir_discard = 0, pir_discard = 0;
+ struct ocelot *ocelot = port->ocelot;
+ u32 pbs_max = 0, cbs_max = 0;
+ u8 ipg = 20;
+ u32 value;
+
+ pir = conf->pir;
+ pbs = conf->pbs;
+
+ switch (conf->mode) {
+ case MSCC_QOS_RATE_MODE_LINE:
+ case MSCC_QOS_RATE_MODE_DATA:
+ if (conf->mode == MSCC_QOS_RATE_MODE_LINE) {
+ frm_mode = POL_MODE_LINERATE;
+ ipg = min_t(u8, GENMASK(4, 0), conf->ipg);
+ } else {
+ frm_mode = POL_MODE_DATARATE;
+ }
+ if (conf->dlb) {
+ cir_ena = 1;
+ cir = conf->cir;
+ cbs = conf->cbs;
+ if (cir == 0 && cbs == 0) {
+ /* Discard cir frames */
+ cir_discard = 1;
+ } else {
+ cir = DIV_ROUND_UP(cir, 100);
+ cir *= 3; /* 33 1/3 kbps */
+ cbs = DIV_ROUND_UP(cbs, 4096);
+ cbs = (cbs ? cbs : 1); /* No zero burst size */
+ cbs_max = 60; /* Limit burst size */
+ cf = conf->cf;
+ if (cf)
+ pir += conf->cir;
+ }
+ }
+ if (pir == 0 && pbs == 0) {
+ /* Discard PIR frames */
+ pir_discard = 1;
+ } else {
+ pir = DIV_ROUND_UP(pir, 100);
+ pir *= 3; /* 33 1/3 kbps */
+ pbs = DIV_ROUND_UP(pbs, 4096);
+ pbs = (pbs ? pbs : 1); /* No zero burst size */
+ pbs_max = 60; /* Limit burst size */
+ }
+ break;
+ case MSCC_QOS_RATE_MODE_FRAME:
+ if (pir >= 100) {
+ frm_mode = POL_MODE_FRMRATE_HI;
+ pir = DIV_ROUND_UP(pir, 100);
+ pir *= 3; /* 33 1/3 fps */
+ pbs = (pbs * 10) / 328; /* 32.8 frames */
+ pbs = (pbs ? pbs : 1); /* No zero burst size */
+ pbs_max = GENMASK(6, 0); /* Limit burst size */
+ } else {
+ frm_mode = POL_MODE_FRMRATE_LO;
+ if (pir == 0 && pbs == 0) {
+ /* Discard all frames */
+ pir_discard = 1;
+ cir_discard = 1;
+ } else {
+ pir *= 3; /* 1/3 fps */
+ pbs = (pbs * 10) / 3; /* 0.3 frames */
+ pbs = (pbs ? pbs : 1); /* No zero burst size */
+ pbs_max = 61; /* Limit burst size */
+ }
+ }
+ break;
+ default: /* MSCC_QOS_RATE_MODE_DISABLED */
+ /* Disable policer using maximum rate and zero burst */
+ pir = GENMASK(15, 0);
+ pbs = 0;
+ break;
+ }
+
+ /* Check limits */
+ if (pir > GENMASK(15, 0)) {
+ netdev_err(port->dev, "Invalid pir\n");
+ return -EINVAL;
+ }
+
+ if (cir > GENMASK(15, 0)) {
+ netdev_err(port->dev, "Invalid cir\n");
+ return -EINVAL;
+ }
+
+ if (pbs > pbs_max) {
+ netdev_err(port->dev, "Invalid pbs\n");
+ return -EINVAL;
+ }
+
+ if (cbs > cbs_max) {
+ netdev_err(port->dev, "Invalid cbs\n");
+ return -EINVAL;
+ }
+
+ value = (ANA_POL_MODE_CFG_IPG_SIZE(ipg) |
+ ANA_POL_MODE_CFG_FRM_MODE(frm_mode) |
+ (cf ? ANA_POL_MODE_CFG_DLB_COUPLED : 0) |
+ (cir_ena ? ANA_POL_MODE_CFG_CIR_ENA : 0) |
+ ANA_POL_MODE_CFG_OVERSHOOT_ENA);
+
+ ocelot_write_gix(ocelot, value, ANA_POL_MODE_CFG, pol_ix);
+
+ ocelot_write_gix(ocelot,
+ ANA_POL_PIR_CFG_PIR_RATE(pir) |
+ ANA_POL_PIR_CFG_PIR_BURST(pbs),
+ ANA_POL_PIR_CFG, pol_ix);
+
+ ocelot_write_gix(ocelot,
+ (pir_discard ? GENMASK(22, 0) : 0),
+ ANA_POL_PIR_STATE, pol_ix);
+
+ ocelot_write_gix(ocelot,
+ ANA_POL_CIR_CFG_CIR_RATE(cir) |
+ ANA_POL_CIR_CFG_CIR_BURST(cbs),
+ ANA_POL_CIR_CFG, pol_ix);
+
+ ocelot_write_gix(ocelot,
+ (cir_discard ? GENMASK(22, 0) : 0),
+ ANA_POL_CIR_STATE, pol_ix);
+
+ return 0;
+}
+
+int ocelot_port_policer_add(struct ocelot_port *port,
+ struct ocelot_policer *pol)
+{
+ struct ocelot *ocelot = port->ocelot;
+ struct qos_policer_conf pp = { 0 };
+ int err;
+
+ if (!pol)
+ return -EINVAL;
+
+ pp.mode = MSCC_QOS_RATE_MODE_DATA;
+ pp.pir = pol->rate;
+ pp.pbs = pol->burst;
+
+ netdev_dbg(port->dev,
+ "%s: port %u pir %u kbps, pbs %u bytes\n",
+ __func__, port->chip_port, pp.pir, pp.pbs);
+
+ err = qos_policer_conf_set(port, POL_IX_PORT + port->chip_port, &pp);
+ if (err)
+ return err;
+
+ ocelot_rmw_gix(ocelot,
+ ANA_PORT_POL_CFG_PORT_POL_ENA |
+ ANA_PORT_POL_CFG_POL_ORDER(POL_ORDER),
+ ANA_PORT_POL_CFG_PORT_POL_ENA |
+ ANA_PORT_POL_CFG_POL_ORDER_M,
+ ANA_PORT_POL_CFG, port->chip_port);
+
+ return 0;
+}
+
+int ocelot_port_policer_del(struct ocelot_port *port)
+{
+ struct ocelot *ocelot = port->ocelot;
+ struct qos_policer_conf pp = { 0 };
+ int err;
+
+ netdev_dbg(port->dev, "%s: port %u\n", __func__, port->chip_port);
+
+ pp.mode = MSCC_QOS_RATE_MODE_DISABLED;
+
+ err = qos_policer_conf_set(port, POL_IX_PORT + port->chip_port, &pp);
+ if (err)
+ return err;
+
+ ocelot_rmw_gix(ocelot,
+ ANA_PORT_POL_CFG_POL_ORDER(POL_ORDER),
+ ANA_PORT_POL_CFG_PORT_POL_ENA |
+ ANA_PORT_POL_CFG_POL_ORDER_M,
+ ANA_PORT_POL_CFG, port->chip_port);
+
+ return 0;
+}
diff --git a/drivers/net/ethernet/mscc/ocelot_police.h b/drivers/net/ethernet/mscc/ocelot_police.h
new file mode 100644
index 000000000000..d1137f79efda
--- /dev/null
+++ b/drivers/net/ethernet/mscc/ocelot_police.h
@@ -0,0 +1,22 @@
+/* SPDX-License-Identifier: (GPL-2.0 OR MIT) */
+/* Microsemi Ocelot Switch driver
+ *
+ * Copyright (c) 2019 Microsemi Corporation
+ */
+
+#ifndef _MSCC_OCELOT_POLICE_H_
+#define _MSCC_OCELOT_POLICE_H_
+
+#include "ocelot.h"
+
+struct ocelot_policer {
+ u32 rate; /* kilobit per second */
+ u32 burst; /* bytes */
+};
+
+int ocelot_port_policer_add(struct ocelot_port *port,
+ struct ocelot_policer *pol);
+
+int ocelot_port_policer_del(struct ocelot_port *port);
+
+#endif /* _MSCC_OCELOT_POLICE_H_ */
diff --git a/drivers/net/ethernet/mscc/ocelot_tc.c b/drivers/net/ethernet/mscc/ocelot_tc.c
new file mode 100644
index 000000000000..a0eaadccfecc
--- /dev/null
+++ b/drivers/net/ethernet/mscc/ocelot_tc.c
@@ -0,0 +1,174 @@
+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+/* Microsemi Ocelot Switch TC driver
+ *
+ * Copyright (c) 2019 Microsemi Corporation
+ */
+
+#include "ocelot_tc.h"
+#include "ocelot_police.h"
+#include <net/pkt_cls.h>
+
+static int ocelot_setup_tc_cls_matchall(struct ocelot_port *port,
+ struct tc_cls_matchall_offload *f,
+ bool ingress)
+{
+ struct netlink_ext_ack *extack = f->common.extack;
+ struct ocelot_policer pol = { 0 };
+ struct flow_action_entry *action;
+ int err;
+
+ netdev_dbg(port->dev, "%s: port %u command %d cookie %lu\n",
+ __func__, port->chip_port, f->command, f->cookie);
+
+ if (!ingress) {
+ NL_SET_ERR_MSG_MOD(extack, "Only ingress is supported");
+ return -EOPNOTSUPP;
+ }
+
+ switch (f->command) {
+ case TC_CLSMATCHALL_REPLACE:
+ if (!flow_offload_has_one_action(&f->rule->action)) {
+ NL_SET_ERR_MSG_MOD(extack,
+ "Only one action is supported");
+ return -EOPNOTSUPP;
+ }
+
+ if (port->tc.block_shared) {
+ NL_SET_ERR_MSG_MOD(extack,
+ "Rate limit is not supported on shared blocks");
+ return -EOPNOTSUPP;
+ }
+
+ action = &f->rule->action.entries[0];
+
+ if (action->id != FLOW_ACTION_POLICE) {
+ NL_SET_ERR_MSG_MOD(extack, "Unsupported action");
+ return -EOPNOTSUPP;
+ }
+
+ if (port->tc.police_id && port->tc.police_id != f->cookie) {
+ NL_SET_ERR_MSG_MOD(extack,
+ "Only one policer per port is supported\n");
+ return -EEXIST;
+ }
+
+ pol.rate = (u32)div_u64(action->police.rate_bytes_ps, 1000) * 8;
+ pol.burst = (u32)div_u64(action->police.rate_bytes_ps *
+ PSCHED_NS2TICKS(action->police.burst),
+ PSCHED_TICKS_PER_SEC);
+
+ err = ocelot_port_policer_add(port, &pol);
+ if (err) {
+ NL_SET_ERR_MSG_MOD(extack, "Could not add policer\n");
+ return err;
+ }
+
+ port->tc.police_id = f->cookie;
+ port->tc.offload_cnt++;
+ return 0;
+ case TC_CLSMATCHALL_DESTROY:
+ if (port->tc.police_id != f->cookie)
+ return -ENOENT;
+
+ err = ocelot_port_policer_del(port);
+ if (err) {
+ NL_SET_ERR_MSG_MOD(extack,
+ "Could not delete policer\n");
+ return err;
+ }
+ port->tc.police_id = 0;
+ port->tc.offload_cnt--;
+ return 0;
+ case TC_CLSMATCHALL_STATS: /* fall through */
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+static int ocelot_setup_tc_block_cb(enum tc_setup_type type,
+ void *type_data,
+ void *cb_priv, bool ingress)
+{
+ struct ocelot_port *port = cb_priv;
+
+ if (!tc_cls_can_offload_and_chain0(port->dev, type_data))
+ return -EOPNOTSUPP;
+
+ switch (type) {
+ case TC_SETUP_CLSMATCHALL:
+ netdev_dbg(port->dev, "tc_block_cb: TC_SETUP_CLSMATCHALL %s\n",
+ ingress ? "ingress" : "egress");
+
+ return ocelot_setup_tc_cls_matchall(port, type_data, ingress);
+ case TC_SETUP_CLSFLOWER:
+ netdev_dbg(port->dev, "tc_block_cb: TC_SETUP_CLSFLOWER %s\n",
+ ingress ? "ingress" : "egress");
+
+ return -EOPNOTSUPP;
+ default:
+ netdev_dbg(port->dev, "tc_block_cb: type %d %s\n",
+ type,
+ ingress ? "ingress" : "egress");
+
+ return -EOPNOTSUPP;
+ }
+}
+
+static int ocelot_setup_tc_block_cb_ig(enum tc_setup_type type,
+ void *type_data,
+ void *cb_priv)
+{
+ return ocelot_setup_tc_block_cb(type, type_data,
+ cb_priv, true);
+}
+
+static int ocelot_setup_tc_block_cb_eg(enum tc_setup_type type,
+ void *type_data,
+ void *cb_priv)
+{
+ return ocelot_setup_tc_block_cb(type, type_data,
+ cb_priv, false);
+}
+
+static int ocelot_setup_tc_block(struct ocelot_port *port,
+ struct tc_block_offload *f)
+{
+ tc_setup_cb_t *cb;
+
+ netdev_dbg(port->dev, "tc_block command %d, binder_type %d\n",
+ f->command, f->binder_type);
+
+ if (f->binder_type == TCF_BLOCK_BINDER_TYPE_CLSACT_INGRESS) {
+ cb = ocelot_setup_tc_block_cb_ig;
+ port->tc.block_shared = tcf_block_shared(f->block);
+ } else if (f->binder_type == TCF_BLOCK_BINDER_TYPE_CLSACT_EGRESS) {
+ cb = ocelot_setup_tc_block_cb_eg;
+ } else {
+ return -EOPNOTSUPP;
+ }
+
+ switch (f->command) {
+ case TC_BLOCK_BIND:
+ return tcf_block_cb_register(f->block, cb, port,
+ port, f->extack);
+ case TC_BLOCK_UNBIND:
+ tcf_block_cb_unregister(f->block, cb, port);
+ return 0;
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+int ocelot_setup_tc(struct net_device *dev, enum tc_setup_type type,
+ void *type_data)
+{
+ struct ocelot_port *port = netdev_priv(dev);
+
+ switch (type) {
+ case TC_SETUP_BLOCK:
+ return ocelot_setup_tc_block(port, type_data);
+ default:
+ return -EOPNOTSUPP;
+ }
+ return 0;
+}
diff --git a/drivers/net/ethernet/mscc/ocelot_tc.h b/drivers/net/ethernet/mscc/ocelot_tc.h
new file mode 100644
index 000000000000..61757c2250a6
--- /dev/null
+++ b/drivers/net/ethernet/mscc/ocelot_tc.h
@@ -0,0 +1,22 @@
+/* SPDX-License-Identifier: (GPL-2.0 OR MIT) */
+/* Microsemi Ocelot Switch driver
+ *
+ * Copyright (c) 2019 Microsemi Corporation
+ */
+
+#ifndef _MSCC_OCELOT_TC_H_
+#define _MSCC_OCELOT_TC_H_
+
+#include <linux/netdevice.h>
+
+struct ocelot_port_tc {
+ bool block_shared;
+ unsigned long offload_cnt;
+
+ unsigned long police_id;
+};
+
+int ocelot_setup_tc(struct net_device *dev, enum tc_setup_type type,
+ void *type_data);
+
+#endif /* _MSCC_OCELOT_TC_H_ */
--
2.17.1
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