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-rw-r--r--drivers/net/dsa/ocelot/felix.c399
-rw-r--r--drivers/net/dsa/ocelot/felix.h14
2 files changed, 216 insertions, 197 deletions
diff --git a/drivers/net/dsa/ocelot/felix.c b/drivers/net/dsa/ocelot/felix.c
index e76a5d434626..beac90bc642c 100644
--- a/drivers/net/dsa/ocelot/felix.c
+++ b/drivers/net/dsa/ocelot/felix.c
@@ -42,43 +42,6 @@ static struct net_device *felix_classify_db(struct dsa_db db)
}
}
-static void felix_migrate_pgid_bit(struct dsa_switch *ds, int from, int to,
- int pgid)
-{
- struct ocelot *ocelot = ds->priv;
- bool on;
- u32 val;
-
- val = ocelot_read_rix(ocelot, ANA_PGID_PGID, pgid);
- on = !!(val & BIT(from));
- val &= ~BIT(from);
- if (on)
- val |= BIT(to);
- else
- val &= ~BIT(to);
-
- ocelot_write_rix(ocelot, val, ANA_PGID_PGID, pgid);
-}
-
-static void felix_migrate_flood_to_npi_port(struct dsa_switch *ds, int port)
-{
- struct ocelot *ocelot = ds->priv;
-
- felix_migrate_pgid_bit(ds, port, ocelot->num_phys_ports, PGID_UC);
- felix_migrate_pgid_bit(ds, port, ocelot->num_phys_ports, PGID_MC);
- felix_migrate_pgid_bit(ds, port, ocelot->num_phys_ports, PGID_BC);
-}
-
-static void
-felix_migrate_flood_to_tag_8021q_port(struct dsa_switch *ds, int port)
-{
- struct ocelot *ocelot = ds->priv;
-
- felix_migrate_pgid_bit(ds, ocelot->num_phys_ports, port, PGID_UC);
- felix_migrate_pgid_bit(ds, ocelot->num_phys_ports, port, PGID_MC);
- felix_migrate_pgid_bit(ds, ocelot->num_phys_ports, port, PGID_BC);
-}
-
/* Set up VCAP ES0 rules for pushing a tag_8021q VLAN towards the CPU such that
* the tagger can perform RX source port identification.
*/
@@ -392,13 +355,107 @@ static int felix_update_trapping_destinations(struct dsa_switch *ds,
return 0;
}
-static int felix_setup_tag_8021q(struct dsa_switch *ds, int cpu)
+/* The CPU port module is connected to the Node Processor Interface (NPI). This
+ * is the mode through which frames can be injected from and extracted to an
+ * external CPU, over Ethernet. In NXP SoCs, the "external CPU" is the ARM CPU
+ * running Linux, and this forms a DSA setup together with the enetc or fman
+ * DSA master.
+ */
+static void felix_npi_port_init(struct ocelot *ocelot, int port)
+{
+ ocelot->npi = port;
+
+ ocelot_write(ocelot, QSYS_EXT_CPU_CFG_EXT_CPUQ_MSK_M |
+ QSYS_EXT_CPU_CFG_EXT_CPU_PORT(port),
+ QSYS_EXT_CPU_CFG);
+
+ /* NPI port Injection/Extraction configuration */
+ ocelot_fields_write(ocelot, port, SYS_PORT_MODE_INCL_XTR_HDR,
+ ocelot->npi_xtr_prefix);
+ ocelot_fields_write(ocelot, port, SYS_PORT_MODE_INCL_INJ_HDR,
+ ocelot->npi_inj_prefix);
+
+ /* Disable transmission of pause frames */
+ ocelot_fields_write(ocelot, port, SYS_PAUSE_CFG_PAUSE_ENA, 0);
+}
+
+static void felix_npi_port_deinit(struct ocelot *ocelot, int port)
+{
+ /* Restore hardware defaults */
+ int unused_port = ocelot->num_phys_ports + 2;
+
+ ocelot->npi = -1;
+
+ ocelot_write(ocelot, QSYS_EXT_CPU_CFG_EXT_CPU_PORT(unused_port),
+ QSYS_EXT_CPU_CFG);
+
+ ocelot_fields_write(ocelot, port, SYS_PORT_MODE_INCL_XTR_HDR,
+ OCELOT_TAG_PREFIX_DISABLED);
+ ocelot_fields_write(ocelot, port, SYS_PORT_MODE_INCL_INJ_HDR,
+ OCELOT_TAG_PREFIX_DISABLED);
+
+ /* Enable transmission of pause frames */
+ ocelot_fields_write(ocelot, port, SYS_PAUSE_CFG_PAUSE_ENA, 1);
+}
+
+static int felix_tag_npi_setup(struct dsa_switch *ds)
+{
+ struct dsa_port *dp, *first_cpu_dp = NULL;
+ struct ocelot *ocelot = ds->priv;
+
+ dsa_switch_for_each_user_port(dp, ds) {
+ if (first_cpu_dp && dp->cpu_dp != first_cpu_dp) {
+ dev_err(ds->dev, "Multiple NPI ports not supported\n");
+ return -EINVAL;
+ }
+
+ first_cpu_dp = dp->cpu_dp;
+ }
+
+ if (!first_cpu_dp)
+ return -EINVAL;
+
+ felix_npi_port_init(ocelot, first_cpu_dp->index);
+
+ return 0;
+}
+
+static void felix_tag_npi_teardown(struct dsa_switch *ds)
{
struct ocelot *ocelot = ds->priv;
- struct dsa_port *dp;
+
+ felix_npi_port_deinit(ocelot, ocelot->npi);
+}
+
+static unsigned long felix_tag_npi_get_host_fwd_mask(struct dsa_switch *ds)
+{
+ struct ocelot *ocelot = ds->priv;
+
+ return BIT(ocelot->num_phys_ports);
+}
+
+static const struct felix_tag_proto_ops felix_tag_npi_proto_ops = {
+ .setup = felix_tag_npi_setup,
+ .teardown = felix_tag_npi_teardown,
+ .get_host_fwd_mask = felix_tag_npi_get_host_fwd_mask,
+};
+
+static int felix_tag_8021q_setup(struct dsa_switch *ds)
+{
+ struct ocelot *ocelot = ds->priv;
+ struct dsa_port *dp, *cpu_dp;
int err;
- felix_8021q_cpu_port_init(ocelot, cpu);
+ err = dsa_tag_8021q_register(ds, htons(ETH_P_8021AD));
+ if (err)
+ return err;
+
+ dsa_switch_for_each_cpu_port(cpu_dp, ds) {
+ felix_8021q_cpu_port_init(ocelot, cpu_dp->index);
+
+ /* TODO we could support multiple CPU ports in tag_8021q mode */
+ break;
+ }
dsa_switch_for_each_available_port(dp, ds) {
/* This overwrites ocelot_init():
@@ -416,21 +473,6 @@ static int felix_setup_tag_8021q(struct dsa_switch *ds, int cpu)
ANA_PORT_CPU_FWD_BPDU_CFG, dp->index);
}
- err = dsa_tag_8021q_register(ds, htons(ETH_P_8021AD));
- if (err)
- return err;
-
- err = ocelot_migrate_mdbs(ocelot, BIT(ocelot->num_phys_ports),
- BIT(cpu));
- if (err)
- goto out_tag_8021q_unregister;
-
- felix_migrate_flood_to_tag_8021q_port(ds, cpu);
-
- err = felix_update_trapping_destinations(ds, true);
- if (err)
- goto out_migrate_flood;
-
/* The ownership of the CPU port module's queues might have just been
* transferred to the tag_8021q tagger from the NPI-based tagger.
* So there might still be all sorts of crap in the queues. On the
@@ -441,27 +483,12 @@ static int felix_setup_tag_8021q(struct dsa_switch *ds, int cpu)
ocelot_drain_cpu_queue(ocelot, 0);
return 0;
-
-out_migrate_flood:
- felix_migrate_flood_to_npi_port(ds, cpu);
- ocelot_migrate_mdbs(ocelot, BIT(cpu), BIT(ocelot->num_phys_ports));
-out_tag_8021q_unregister:
- dsa_tag_8021q_unregister(ds);
- return err;
}
-static void felix_teardown_tag_8021q(struct dsa_switch *ds, int cpu)
+static void felix_tag_8021q_teardown(struct dsa_switch *ds)
{
struct ocelot *ocelot = ds->priv;
- struct dsa_port *dp;
- int err;
-
- err = felix_update_trapping_destinations(ds, false);
- if (err)
- dev_err(ds->dev, "felix_teardown_mmio_filtering returned %d",
- err);
-
- dsa_tag_8021q_unregister(ds);
+ struct dsa_port *dp, *cpu_dp;
dsa_switch_for_each_available_port(dp, ds) {
/* Restore the logic from ocelot_init:
@@ -473,110 +500,99 @@ static void felix_teardown_tag_8021q(struct dsa_switch *ds, int cpu)
dp->index);
}
- felix_8021q_cpu_port_deinit(ocelot, cpu);
-}
-
-/* The CPU port module is connected to the Node Processor Interface (NPI). This
- * is the mode through which frames can be injected from and extracted to an
- * external CPU, over Ethernet. In NXP SoCs, the "external CPU" is the ARM CPU
- * running Linux, and this forms a DSA setup together with the enetc or fman
- * DSA master.
- */
-static void felix_npi_port_init(struct ocelot *ocelot, int port)
-{
- ocelot->npi = port;
-
- ocelot_write(ocelot, QSYS_EXT_CPU_CFG_EXT_CPUQ_MSK_M |
- QSYS_EXT_CPU_CFG_EXT_CPU_PORT(port),
- QSYS_EXT_CPU_CFG);
+ dsa_switch_for_each_cpu_port(cpu_dp, ds) {
+ felix_8021q_cpu_port_deinit(ocelot, cpu_dp->index);
- /* NPI port Injection/Extraction configuration */
- ocelot_fields_write(ocelot, port, SYS_PORT_MODE_INCL_XTR_HDR,
- ocelot->npi_xtr_prefix);
- ocelot_fields_write(ocelot, port, SYS_PORT_MODE_INCL_INJ_HDR,
- ocelot->npi_inj_prefix);
+ /* TODO we could support multiple CPU ports in tag_8021q mode */
+ break;
+ }
- /* Disable transmission of pause frames */
- ocelot_fields_write(ocelot, port, SYS_PAUSE_CFG_PAUSE_ENA, 0);
+ dsa_tag_8021q_unregister(ds);
}
-static void felix_npi_port_deinit(struct ocelot *ocelot, int port)
+static unsigned long felix_tag_8021q_get_host_fwd_mask(struct dsa_switch *ds)
{
- /* Restore hardware defaults */
- int unused_port = ocelot->num_phys_ports + 2;
+ return dsa_cpu_ports(ds);
+}
- ocelot->npi = -1;
+static const struct felix_tag_proto_ops felix_tag_8021q_proto_ops = {
+ .setup = felix_tag_8021q_setup,
+ .teardown = felix_tag_8021q_teardown,
+ .get_host_fwd_mask = felix_tag_8021q_get_host_fwd_mask,
+};
- ocelot_write(ocelot, QSYS_EXT_CPU_CFG_EXT_CPU_PORT(unused_port),
- QSYS_EXT_CPU_CFG);
+static void felix_set_host_flood(struct dsa_switch *ds, unsigned long mask,
+ bool uc, bool mc, bool bc)
+{
+ struct ocelot *ocelot = ds->priv;
+ unsigned long val;
- ocelot_fields_write(ocelot, port, SYS_PORT_MODE_INCL_XTR_HDR,
- OCELOT_TAG_PREFIX_DISABLED);
- ocelot_fields_write(ocelot, port, SYS_PORT_MODE_INCL_INJ_HDR,
- OCELOT_TAG_PREFIX_DISABLED);
+ val = uc ? mask : 0;
+ ocelot_rmw_rix(ocelot, val, mask, ANA_PGID_PGID, PGID_UC);
- /* Enable transmission of pause frames */
- ocelot_fields_write(ocelot, port, SYS_PAUSE_CFG_PAUSE_ENA, 1);
+ val = mc ? mask : 0;
+ ocelot_rmw_rix(ocelot, val, mask, ANA_PGID_PGID, PGID_MC);
+ ocelot_rmw_rix(ocelot, val, mask, ANA_PGID_PGID, PGID_MCIPV4);
+ ocelot_rmw_rix(ocelot, val, mask, ANA_PGID_PGID, PGID_MCIPV6);
}
-static int felix_setup_tag_npi(struct dsa_switch *ds, int cpu)
+static void
+felix_migrate_host_flood(struct dsa_switch *ds,
+ const struct felix_tag_proto_ops *proto_ops,
+ const struct felix_tag_proto_ops *old_proto_ops)
{
struct ocelot *ocelot = ds->priv;
- int err;
-
- err = ocelot_migrate_mdbs(ocelot, BIT(cpu),
- BIT(ocelot->num_phys_ports));
- if (err)
- return err;
-
- felix_migrate_flood_to_npi_port(ds, cpu);
+ struct felix *felix = ocelot_to_felix(ocelot);
+ unsigned long mask;
- felix_npi_port_init(ocelot, cpu);
+ if (old_proto_ops) {
+ mask = old_proto_ops->get_host_fwd_mask(ds);
+ felix_set_host_flood(ds, mask, false, false, false);
+ }
- return 0;
+ mask = proto_ops->get_host_fwd_mask(ds);
+ felix_set_host_flood(ds, mask, !!felix->host_flood_uc_mask,
+ !!felix->host_flood_mc_mask, true);
}
-static void felix_teardown_tag_npi(struct dsa_switch *ds, int cpu)
+static int felix_migrate_mdbs(struct dsa_switch *ds,
+ const struct felix_tag_proto_ops *proto_ops,
+ const struct felix_tag_proto_ops *old_proto_ops)
{
struct ocelot *ocelot = ds->priv;
+ unsigned long from, to;
+
+ if (!old_proto_ops)
+ return 0;
+
+ from = old_proto_ops->get_host_fwd_mask(ds);
+ to = proto_ops->get_host_fwd_mask(ds);
- felix_npi_port_deinit(ocelot, cpu);
+ return ocelot_migrate_mdbs(ocelot, from, to);
}
-static int felix_set_tag_protocol(struct dsa_switch *ds, int cpu,
- enum dsa_tag_protocol proto)
+/* Configure the shared hardware resources for a transition between
+ * @old_proto_ops and @proto_ops.
+ * Manual migration is needed because as far as DSA is concerned, no change of
+ * the CPU port is taking place here, just of the tagging protocol.
+ */
+static int
+felix_tag_proto_setup_shared(struct dsa_switch *ds,
+ const struct felix_tag_proto_ops *proto_ops,
+ const struct felix_tag_proto_ops *old_proto_ops)
{
+ bool using_tag_8021q = (proto_ops == &felix_tag_8021q_proto_ops);
int err;
- switch (proto) {
- case DSA_TAG_PROTO_SEVILLE:
- case DSA_TAG_PROTO_OCELOT:
- err = felix_setup_tag_npi(ds, cpu);
- break;
- case DSA_TAG_PROTO_OCELOT_8021Q:
- err = felix_setup_tag_8021q(ds, cpu);
- break;
- default:
- err = -EPROTONOSUPPORT;
- }
+ err = felix_migrate_mdbs(ds, proto_ops, old_proto_ops);
+ if (err)
+ return err;
- return err;
-}
+ felix_update_trapping_destinations(ds, using_tag_8021q);
-static void felix_del_tag_protocol(struct dsa_switch *ds, int cpu,
- enum dsa_tag_protocol proto)
-{
- switch (proto) {
- case DSA_TAG_PROTO_SEVILLE:
- case DSA_TAG_PROTO_OCELOT:
- felix_teardown_tag_npi(ds, cpu);
- break;
- case DSA_TAG_PROTO_OCELOT_8021Q:
- felix_teardown_tag_8021q(ds, cpu);
- break;
- default:
- break;
- }
+ felix_migrate_host_flood(ds, proto_ops, old_proto_ops);
+
+ return 0;
}
/* This always leaves the switch in a consistent state, because although the
@@ -586,33 +602,45 @@ static void felix_del_tag_protocol(struct dsa_switch *ds, int cpu,
static int felix_change_tag_protocol(struct dsa_switch *ds,
enum dsa_tag_protocol proto)
{
+ const struct felix_tag_proto_ops *old_proto_ops, *proto_ops;
struct ocelot *ocelot = ds->priv;
struct felix *felix = ocelot_to_felix(ocelot);
- enum dsa_tag_protocol old_proto = felix->tag_proto;
- struct dsa_port *cpu_dp;
int err;
- if (proto != DSA_TAG_PROTO_SEVILLE &&
- proto != DSA_TAG_PROTO_OCELOT &&
- proto != DSA_TAG_PROTO_OCELOT_8021Q)
+ switch (proto) {
+ case DSA_TAG_PROTO_SEVILLE:
+ case DSA_TAG_PROTO_OCELOT:
+ proto_ops = &felix_tag_npi_proto_ops;
+ break;
+ case DSA_TAG_PROTO_OCELOT_8021Q:
+ proto_ops = &felix_tag_8021q_proto_ops;
+ break;
+ default:
return -EPROTONOSUPPORT;
+ }
- dsa_switch_for_each_cpu_port(cpu_dp, ds) {
- felix_del_tag_protocol(ds, cpu_dp->index, old_proto);
+ old_proto_ops = felix->tag_proto_ops;
- err = felix_set_tag_protocol(ds, cpu_dp->index, proto);
- if (err) {
- felix_set_tag_protocol(ds, cpu_dp->index, old_proto);
- return err;
- }
+ err = proto_ops->setup(ds);
+ if (err)
+ goto setup_failed;
- /* Stop at first CPU port */
- break;
- }
+ err = felix_tag_proto_setup_shared(ds, proto_ops, old_proto_ops);
+ if (err)
+ goto setup_shared_failed;
+ if (old_proto_ops)
+ old_proto_ops->teardown(ds);
+
+ felix->tag_proto_ops = proto_ops;
felix->tag_proto = proto;
return 0;
+
+setup_shared_failed:
+ proto_ops->teardown(ds);
+setup_failed:
+ return err;
}
static enum dsa_tag_protocol felix_get_tag_protocol(struct dsa_switch *ds,
@@ -630,7 +658,7 @@ static void felix_port_set_host_flood(struct dsa_switch *ds, int port,
{
struct ocelot *ocelot = ds->priv;
struct felix *felix = ocelot_to_felix(ocelot);
- unsigned long mask, val;
+ unsigned long mask;
if (uc)
felix->host_flood_uc_mask |= BIT(port);
@@ -642,18 +670,9 @@ static void felix_port_set_host_flood(struct dsa_switch *ds, int port,
else
felix->host_flood_mc_mask &= ~BIT(port);
- if (felix->tag_proto == DSA_TAG_PROTO_OCELOT_8021Q)
- mask = dsa_cpu_ports(ds);
- else
- mask = BIT(ocelot->num_phys_ports);
-
- val = (felix->host_flood_uc_mask) ? mask : 0;
- ocelot_rmw_rix(ocelot, val, mask, ANA_PGID_PGID, PGID_UC);
-
- val = (felix->host_flood_mc_mask) ? mask : 0;
- ocelot_rmw_rix(ocelot, val, mask, ANA_PGID_PGID, PGID_MC);
- ocelot_rmw_rix(ocelot, val, mask, ANA_PGID_PGID, PGID_MCIPV4);
- ocelot_rmw_rix(ocelot, val, mask, ANA_PGID_PGID, PGID_MCIPV6);
+ mask = felix->tag_proto_ops->get_host_fwd_mask(ds);
+ felix_set_host_flood(ds, mask, !!felix->host_flood_uc_mask,
+ !!felix->host_flood_mc_mask, true);
}
static int felix_set_ageing_time(struct dsa_switch *ds,
@@ -1332,7 +1351,6 @@ static int felix_setup(struct dsa_switch *ds)
{
struct ocelot *ocelot = ds->priv;
struct felix *felix = ocelot_to_felix(ocelot);
- unsigned long cpu_flood;
struct dsa_port *dp;
int err;
@@ -1366,21 +1384,10 @@ static int felix_setup(struct dsa_switch *ds)
if (err)
goto out_deinit_ports;
- dsa_switch_for_each_cpu_port(dp, ds) {
- /* The initial tag protocol is NPI which always returns 0, so
- * there's no real point in checking for errors.
- */
- felix_set_tag_protocol(ds, dp->index, felix->tag_proto);
-
- /* Start off with flooding disabled towards the NPI port
- * (actually CPU port module).
- */
- cpu_flood = ANA_PGID_PGID_PGID(BIT(ocelot->num_phys_ports));
- ocelot_rmw_rix(ocelot, 0, cpu_flood, ANA_PGID_PGID, PGID_UC);
- ocelot_rmw_rix(ocelot, 0, cpu_flood, ANA_PGID_PGID, PGID_MC);
-
- break;
- }
+ /* The initial tag protocol is NPI which won't fail during initial
+ * setup, there's no real point in checking for errors.
+ */
+ felix_change_tag_protocol(ds, felix->tag_proto);
ds->mtu_enforcement_ingress = true;
ds->assisted_learning_on_cpu_port = true;
@@ -1409,10 +1416,8 @@ static void felix_teardown(struct dsa_switch *ds)
struct felix *felix = ocelot_to_felix(ocelot);
struct dsa_port *dp;
- dsa_switch_for_each_cpu_port(dp, ds) {
- felix_del_tag_protocol(ds, dp->index, felix->tag_proto);
- break;
- }
+ if (felix->tag_proto_ops)
+ felix->tag_proto_ops->teardown(ds);
dsa_switch_for_each_available_port(dp, ds)
ocelot_deinit_port(ocelot, dp->index);
diff --git a/drivers/net/dsa/ocelot/felix.h b/drivers/net/dsa/ocelot/felix.h
index b34bde43f11b..9e07eb7ee28d 100644
--- a/drivers/net/dsa/ocelot/felix.h
+++ b/drivers/net/dsa/ocelot/felix.h
@@ -59,6 +59,19 @@ struct felix_info {
struct resource *res);
};
+/* Methods for initializing the hardware resources specific to a tagging
+ * protocol (like the NPI port, for "ocelot" or "seville", or the VCAP TCAMs,
+ * for "ocelot-8021q").
+ * It is important that the resources configured here do not have side effects
+ * for the other tagging protocols. If that is the case, their configuration
+ * needs to go to felix_tag_proto_setup_shared().
+ */
+struct felix_tag_proto_ops {
+ int (*setup)(struct dsa_switch *ds);
+ void (*teardown)(struct dsa_switch *ds);
+ unsigned long (*get_host_fwd_mask)(struct dsa_switch *ds);
+};
+
extern const struct dsa_switch_ops felix_switch_ops;
/* DSA glue / front-end for struct ocelot */
@@ -71,6 +84,7 @@ struct felix {
resource_size_t switch_base;
resource_size_t imdio_base;
enum dsa_tag_protocol tag_proto;
+ const struct felix_tag_proto_ops *tag_proto_ops;
struct kthread_worker *xmit_worker;
unsigned long host_flood_uc_mask;
unsigned long host_flood_mc_mask;
generated by cgit v1.2.3 (git 2.39.1) at 2024-10-31 01:52:01 +0000