#include <linux/inetdevice.h>
#include <net/switchdev.h>
#include <generated/utsrelease.h>
+#include <net/pkt_cls.h>
+#include <net/tc_act/tc_mirred.h>
#include "spectrum.h"
#include "core.h"
*/
MLXSW_ITEM32(tx, hdr, type, 0x0C, 0, 4);
+static bool mlxsw_sp_port_dev_check(const struct net_device *dev);
+
static void mlxsw_sp_txhdr_construct(struct sk_buff *skb,
const struct mlxsw_tx_info *tx_info)
{
return 0;
}
+static int mlxsw_sp_span_init(struct mlxsw_sp *mlxsw_sp)
+{
+ struct mlxsw_resources *resources;
+ int i;
+
+ resources = mlxsw_core_resources_get(mlxsw_sp->core);
+ if (!resources->max_span_valid)
+ return -EIO;
+
+ mlxsw_sp->span.entries_count = resources->max_span;
+ mlxsw_sp->span.entries = kcalloc(mlxsw_sp->span.entries_count,
+ sizeof(struct mlxsw_sp_span_entry),
+ GFP_KERNEL);
+ if (!mlxsw_sp->span.entries)
+ return -ENOMEM;
+
+ for (i = 0; i < mlxsw_sp->span.entries_count; i++)
+ INIT_LIST_HEAD(&mlxsw_sp->span.entries[i].bound_ports_list);
+
+ return 0;
+}
+
+static void mlxsw_sp_span_fini(struct mlxsw_sp *mlxsw_sp)
+{
+ int i;
+
+ for (i = 0; i < mlxsw_sp->span.entries_count; i++) {
+ struct mlxsw_sp_span_entry *curr = &mlxsw_sp->span.entries[i];
+
+ WARN_ON_ONCE(!list_empty(&curr->bound_ports_list));
+ }
+ kfree(mlxsw_sp->span.entries);
+}
+
+static struct mlxsw_sp_span_entry *
+mlxsw_sp_span_entry_create(struct mlxsw_sp_port *port)
+{
+ struct mlxsw_sp *mlxsw_sp = port->mlxsw_sp;
+ struct mlxsw_sp_span_entry *span_entry;
+ char mpat_pl[MLXSW_REG_MPAT_LEN];
+ u8 local_port = port->local_port;
+ int index;
+ int i;
+ int err;
+
+ /* find a free entry to use */
+ index = -1;
+ for (i = 0; i < mlxsw_sp->span.entries_count; i++) {
+ if (!mlxsw_sp->span.entries[i].used) {
+ index = i;
+ span_entry = &mlxsw_sp->span.entries[i];
+ break;
+ }
+ }
+ if (index < 0)
+ return NULL;
+
+ /* create a new port analayzer entry for local_port */
+ mlxsw_reg_mpat_pack(mpat_pl, index, local_port, true);
+ err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(mpat), mpat_pl);
+ if (err)
+ return NULL;
+
+ span_entry->used = true;
+ span_entry->id = index;
+ span_entry->ref_count = 0;
+ span_entry->local_port = local_port;
+ return span_entry;
+}
+
+static void mlxsw_sp_span_entry_destroy(struct mlxsw_sp *mlxsw_sp,
+ struct mlxsw_sp_span_entry *span_entry)
+{
+ u8 local_port = span_entry->local_port;
+ char mpat_pl[MLXSW_REG_MPAT_LEN];
+ int pa_id = span_entry->id;
+
+ mlxsw_reg_mpat_pack(mpat_pl, pa_id, local_port, false);
+ mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(mpat), mpat_pl);
+ span_entry->used = false;
+}
+
+struct mlxsw_sp_span_entry *mlxsw_sp_span_entry_find(struct mlxsw_sp_port *port)
+{
+ struct mlxsw_sp *mlxsw_sp = port->mlxsw_sp;
+ int i;
+
+ for (i = 0; i < mlxsw_sp->span.entries_count; i++) {
+ struct mlxsw_sp_span_entry *curr = &mlxsw_sp->span.entries[i];
+
+ if (curr->used && curr->local_port == port->local_port)
+ return curr;
+ }
+ return NULL;
+}
+
+struct mlxsw_sp_span_entry *mlxsw_sp_span_entry_get(struct mlxsw_sp_port *port)
+{
+ struct mlxsw_sp_span_entry *span_entry;
+
+ span_entry = mlxsw_sp_span_entry_find(port);
+ if (span_entry) {
+ span_entry->ref_count++;
+ return span_entry;
+ }
+
+ return mlxsw_sp_span_entry_create(port);
+}
+
+static int mlxsw_sp_span_entry_put(struct mlxsw_sp *mlxsw_sp,
+ struct mlxsw_sp_span_entry *span_entry)
+{
+ if (--span_entry->ref_count == 0)
+ mlxsw_sp_span_entry_destroy(mlxsw_sp, span_entry);
+ return 0;
+}
+
+static bool mlxsw_sp_span_is_egress_mirror(struct mlxsw_sp_port *port)
+{
+ struct mlxsw_sp *mlxsw_sp = port->mlxsw_sp;
+ struct mlxsw_sp_span_inspected_port *p;
+ int i;
+
+ for (i = 0; i < mlxsw_sp->span.entries_count; i++) {
+ struct mlxsw_sp_span_entry *curr = &mlxsw_sp->span.entries[i];
+
+ list_for_each_entry(p, &curr->bound_ports_list, list)
+ if (p->local_port == port->local_port &&
+ p->type == MLXSW_SP_SPAN_EGRESS)
+ return true;
+ }
+
+ return false;
+}
+
+static int mlxsw_sp_span_mtu_to_buffsize(int mtu)
+{
+ return MLXSW_SP_BYTES_TO_CELLS(mtu * 5 / 2) + 1;
+}
+
+static int mlxsw_sp_span_port_mtu_update(struct mlxsw_sp_port *port, u16 mtu)
+{
+ struct mlxsw_sp *mlxsw_sp = port->mlxsw_sp;
+ char sbib_pl[MLXSW_REG_SBIB_LEN];
+ int err;
+
+ /* If port is egress mirrored, the shared buffer size should be
+ * updated according to the mtu value
+ */
+ if (mlxsw_sp_span_is_egress_mirror(port)) {
+ mlxsw_reg_sbib_pack(sbib_pl, port->local_port,
+ mlxsw_sp_span_mtu_to_buffsize(mtu));
+ err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(sbib), sbib_pl);
+ if (err) {
+ netdev_err(port->dev, "Could not update shared buffer for mirroring\n");
+ return err;
+ }
+ }
+
+ return 0;
+}
+
+static struct mlxsw_sp_span_inspected_port *
+mlxsw_sp_span_entry_bound_port_find(struct mlxsw_sp_port *port,
+ struct mlxsw_sp_span_entry *span_entry)
+{
+ struct mlxsw_sp_span_inspected_port *p;
+
+ list_for_each_entry(p, &span_entry->bound_ports_list, list)
+ if (port->local_port == p->local_port)
+ return p;
+ return NULL;
+}
+
+static int
+mlxsw_sp_span_inspected_port_bind(struct mlxsw_sp_port *port,
+ struct mlxsw_sp_span_entry *span_entry,
+ enum mlxsw_sp_span_type type)
+{
+ struct mlxsw_sp_span_inspected_port *inspected_port;
+ struct mlxsw_sp *mlxsw_sp = port->mlxsw_sp;
+ char mpar_pl[MLXSW_REG_MPAR_LEN];
+ char sbib_pl[MLXSW_REG_SBIB_LEN];
+ int pa_id = span_entry->id;
+ int err;
+
+ /* if it is an egress SPAN, bind a shared buffer to it */
+ if (type == MLXSW_SP_SPAN_EGRESS) {
+ mlxsw_reg_sbib_pack(sbib_pl, port->local_port,
+ mlxsw_sp_span_mtu_to_buffsize(port->dev->mtu));
+ err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(sbib), sbib_pl);
+ if (err) {
+ netdev_err(port->dev, "Could not create shared buffer for mirroring\n");
+ return err;
+ }
+ }
+
+ /* bind the port to the SPAN entry */
+ mlxsw_reg_mpar_pack(mpar_pl, port->local_port, type, true, pa_id);
+ err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(mpar), mpar_pl);
+ if (err)
+ goto err_mpar_reg_write;
+
+ inspected_port = kzalloc(sizeof(*inspected_port), GFP_KERNEL);
+ if (!inspected_port) {
+ err = -ENOMEM;
+ goto err_inspected_port_alloc;
+ }
+ inspected_port->local_port = port->local_port;
+ inspected_port->type = type;
+ list_add_tail(&inspected_port->list, &span_entry->bound_ports_list);
+
+ return 0;
+
+err_mpar_reg_write:
+err_inspected_port_alloc:
+ if (type == MLXSW_SP_SPAN_EGRESS) {
+ mlxsw_reg_sbib_pack(sbib_pl, port->local_port, 0);
+ mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(sbib), sbib_pl);
+ }
+ return err;
+}
+
+static void
+mlxsw_sp_span_inspected_port_unbind(struct mlxsw_sp_port *port,
+ struct mlxsw_sp_span_entry *span_entry,
+ enum mlxsw_sp_span_type type)
+{
+ struct mlxsw_sp_span_inspected_port *inspected_port;
+ struct mlxsw_sp *mlxsw_sp = port->mlxsw_sp;
+ char mpar_pl[MLXSW_REG_MPAR_LEN];
+ char sbib_pl[MLXSW_REG_SBIB_LEN];
+ int pa_id = span_entry->id;
+
+ inspected_port = mlxsw_sp_span_entry_bound_port_find(port, span_entry);
+ if (!inspected_port)
+ return;
+
+ /* remove the inspected port */
+ mlxsw_reg_mpar_pack(mpar_pl, port->local_port, type, false, pa_id);
+ mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(mpar), mpar_pl);
+
+ /* remove the SBIB buffer if it was egress SPAN */
+ if (type == MLXSW_SP_SPAN_EGRESS) {
+ mlxsw_reg_sbib_pack(sbib_pl, port->local_port, 0);
+ mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(sbib), sbib_pl);
+ }
+
+ mlxsw_sp_span_entry_put(mlxsw_sp, span_entry);
+
+ list_del(&inspected_port->list);
+ kfree(inspected_port);
+}
+
+static int mlxsw_sp_span_mirror_add(struct mlxsw_sp_port *from,
+ struct mlxsw_sp_port *to,
+ enum mlxsw_sp_span_type type)
+{
+ struct mlxsw_sp *mlxsw_sp = from->mlxsw_sp;
+ struct mlxsw_sp_span_entry *span_entry;
+ int err;
+
+ span_entry = mlxsw_sp_span_entry_get(to);
+ if (!span_entry)
+ return -ENOENT;
+
+ netdev_dbg(from->dev, "Adding inspected port to SPAN entry %d\n",
+ span_entry->id);
+
+ err = mlxsw_sp_span_inspected_port_bind(from, span_entry, type);
+ if (err)
+ goto err_port_bind;
+
+ return 0;
+
+err_port_bind:
+ mlxsw_sp_span_entry_put(mlxsw_sp, span_entry);
+ return err;
+}
+
+static void mlxsw_sp_span_mirror_remove(struct mlxsw_sp_port *from,
+ struct mlxsw_sp_port *to,
+ enum mlxsw_sp_span_type type)
+{
+ struct mlxsw_sp_span_entry *span_entry;
+
+ span_entry = mlxsw_sp_span_entry_find(to);
+ if (!span_entry) {
+ netdev_err(from->dev, "no span entry found\n");
+ return;
+ }
+
+ netdev_dbg(from->dev, "removing inspected port from SPAN entry %d\n",
+ span_entry->id);
+ mlxsw_sp_span_inspected_port_unbind(from, span_entry, type);
+}
+
static int mlxsw_sp_port_admin_status_set(struct mlxsw_sp_port *mlxsw_sp_port,
bool is_up)
{
err = mlxsw_sp_port_headroom_set(mlxsw_sp_port, mtu, pause_en);
if (err)
return err;
+ err = mlxsw_sp_span_port_mtu_update(mlxsw_sp_port, mtu);
+ if (err)
+ goto err_span_port_mtu_update;
err = mlxsw_sp_port_mtu_set(mlxsw_sp_port, mtu);
if (err)
goto err_port_mtu_set;
return 0;
err_port_mtu_set:
+ mlxsw_sp_span_port_mtu_update(mlxsw_sp_port, dev->mtu);
+err_span_port_mtu_update:
mlxsw_sp_port_headroom_set(mlxsw_sp_port, dev->mtu, pause_en);
return err;
}
return 0;
}
+static struct mlxsw_sp_port_mall_tc_entry *
+mlxsw_sp_port_mirror_entry_find(struct mlxsw_sp_port *port,
+ unsigned long cookie) {
+ struct mlxsw_sp_port_mall_tc_entry *mall_tc_entry;
+
+ list_for_each_entry(mall_tc_entry, &port->mall_tc_list, list)
+ if (mall_tc_entry->cookie == cookie)
+ return mall_tc_entry;
+
+ return NULL;
+}
+
+static int
+mlxsw_sp_port_add_cls_matchall_mirror(struct mlxsw_sp_port *mlxsw_sp_port,
+ struct tc_cls_matchall_offload *cls,
+ const struct tc_action *a,
+ bool ingress)
+{
+ struct mlxsw_sp_port_mall_tc_entry *mall_tc_entry;
+ struct net *net = dev_net(mlxsw_sp_port->dev);
+ enum mlxsw_sp_span_type span_type;
+ struct mlxsw_sp_port *to_port;
+ struct net_device *to_dev;
+ int ifindex;
+ int err;
+
+ ifindex = tcf_mirred_ifindex(a);
+ to_dev = __dev_get_by_index(net, ifindex);
+ if (!to_dev) {
+ netdev_err(mlxsw_sp_port->dev, "Could not find requested device\n");
+ return -EINVAL;
+ }
+
+ if (!mlxsw_sp_port_dev_check(to_dev)) {
+ netdev_err(mlxsw_sp_port->dev, "Cannot mirror to a non-spectrum port");
+ return -ENOTSUPP;
+ }
+ to_port = netdev_priv(to_dev);
+
+ mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL);
+ if (!mall_tc_entry)
+ return -ENOMEM;
+
+ mall_tc_entry->cookie = cls->cookie;
+ mall_tc_entry->type = MLXSW_SP_PORT_MALL_MIRROR;
+ mall_tc_entry->mirror.to_local_port = to_port->local_port;
+ mall_tc_entry->mirror.ingress = ingress;
+ list_add_tail(&mall_tc_entry->list, &mlxsw_sp_port->mall_tc_list);
+
+ span_type = ingress ? MLXSW_SP_SPAN_INGRESS : MLXSW_SP_SPAN_EGRESS;
+ err = mlxsw_sp_span_mirror_add(mlxsw_sp_port, to_port, span_type);
+ if (err)
+ goto err_mirror_add;
+ return 0;
+
+err_mirror_add:
+ list_del(&mall_tc_entry->list);
+ kfree(mall_tc_entry);
+ return err;
+}
+
+static int mlxsw_sp_port_add_cls_matchall(struct mlxsw_sp_port *mlxsw_sp_port,
+ __be16 protocol,
+ struct tc_cls_matchall_offload *cls,
+ bool ingress)
+{
+ struct tcf_exts *exts = cls->exts;
+ const struct tc_action *a;
+ int err;
+
+ if (!list_is_singular(&exts->actions)) {
+ netdev_err(mlxsw_sp_port->dev, "only singular actions are supported\n");
+ return -ENOTSUPP;
+ }
+
+ a = list_first_entry(&exts->actions, struct tc_action, list);
+ if (is_tcf_mirred_mirror(a) && protocol == htons(ETH_P_ALL)) {
+ err = mlxsw_sp_port_add_cls_matchall_mirror(mlxsw_sp_port, cls,
+ a, ingress);
+ if (err)
+ return err;
+ } else {
+ return -ENOTSUPP;
+ }
+
+ return 0;
+}
+
+static void mlxsw_sp_port_del_cls_matchall(struct mlxsw_sp_port *mlxsw_sp_port,
+ struct tc_cls_matchall_offload *cls)
+{
+ struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
+ struct mlxsw_sp_port_mall_tc_entry *mall_tc_entry;
+ enum mlxsw_sp_span_type span_type;
+ struct mlxsw_sp_port *to_port;
+
+ mall_tc_entry = mlxsw_sp_port_mirror_entry_find(mlxsw_sp_port,
+ cls->cookie);
+ if (!mall_tc_entry) {
+ netdev_dbg(mlxsw_sp_port->dev, "tc entry not found on port\n");
+ return;
+ }
+
+ switch (mall_tc_entry->type) {
+ case MLXSW_SP_PORT_MALL_MIRROR:
+ to_port = mlxsw_sp->ports[mall_tc_entry->mirror.to_local_port];
+ span_type = mall_tc_entry->mirror.ingress ?
+ MLXSW_SP_SPAN_INGRESS : MLXSW_SP_SPAN_EGRESS;
+
+ mlxsw_sp_span_mirror_remove(mlxsw_sp_port, to_port, span_type);
+ break;
+ default:
+ WARN_ON(1);
+ }
+
+ list_del(&mall_tc_entry->list);
+ kfree(mall_tc_entry);
+}
+
+static int mlxsw_sp_setup_tc(struct net_device *dev, u32 handle,
+ __be16 proto, struct tc_to_netdev *tc)
+{
+ struct mlxsw_sp_port *mlxsw_sp_port = netdev_priv(dev);
+ bool ingress = TC_H_MAJ(handle) == TC_H_MAJ(TC_H_INGRESS);
+
+ if (tc->type == TC_SETUP_MATCHALL) {
+ switch (tc->cls_mall->command) {
+ case TC_CLSMATCHALL_REPLACE:
+ return mlxsw_sp_port_add_cls_matchall(mlxsw_sp_port,
+ proto,
+ tc->cls_mall,
+ ingress);
+ case TC_CLSMATCHALL_DESTROY:
+ mlxsw_sp_port_del_cls_matchall(mlxsw_sp_port,
+ tc->cls_mall);
+ return 0;
+ default:
+ return -EINVAL;
+ }
+ }
+
+ return -ENOTSUPP;
+}
+
static const struct net_device_ops mlxsw_sp_port_netdev_ops = {
.ndo_open = mlxsw_sp_port_open,
.ndo_stop = mlxsw_sp_port_stop,
.ndo_start_xmit = mlxsw_sp_port_xmit,
+ .ndo_setup_tc = mlxsw_sp_setup_tc,
.ndo_set_rx_mode = mlxsw_sp_set_rx_mode,
.ndo_set_mac_address = mlxsw_sp_port_set_mac_address,
.ndo_change_mtu = mlxsw_sp_port_change_mtu,
goto err_port_untagged_vlans_alloc;
}
INIT_LIST_HEAD(&mlxsw_sp_port->vports_list);
+ INIT_LIST_HEAD(&mlxsw_sp_port->mall_tc_list);
mlxsw_sp_port->pcpu_stats =
netdev_alloc_pcpu_stats(struct mlxsw_sp_port_pcpu_stats);
netif_carrier_off(dev);
dev->features |= NETIF_F_NETNS_LOCAL | NETIF_F_LLTX | NETIF_F_SG |
- NETIF_F_HW_VLAN_CTAG_FILTER;
+ NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_TC;
+ dev->hw_features |= NETIF_F_HW_TC;
/* Each packet needs to have a Tx header (metadata) on top all other
* headers.
goto err_router_init;
}
+ err = mlxsw_sp_span_init(mlxsw_sp);
+ if (err) {
+ dev_err(mlxsw_sp->bus_info->dev, "Failed to init span system\n");
+ goto err_span_init;
+ }
+
err = mlxsw_sp_ports_create(mlxsw_sp);
if (err) {
dev_err(mlxsw_sp->bus_info->dev, "Failed to create ports\n");
return 0;
err_ports_create:
+ mlxsw_sp_span_fini(mlxsw_sp);
+err_span_init:
mlxsw_sp_router_fini(mlxsw_sp);
err_router_init:
mlxsw_sp_switchdev_fini(mlxsw_sp);
int i;
mlxsw_sp_ports_remove(mlxsw_sp);
+ mlxsw_sp_span_fini(mlxsw_sp);
mlxsw_sp_router_fini(mlxsw_sp);
mlxsw_sp_switchdev_fini(mlxsw_sp);
mlxsw_sp_buffers_fini(mlxsw_sp);
projects / cascardo / linux.git / commitdiff