diff options
Diffstat (limited to 'drivers/net/ethernet/sfc/tc_bindings.c')
| -rw-r--r-- | drivers/net/ethernet/sfc/tc_bindings.c | 228 |
1 files changed, 228 insertions, 0 deletions
diff --git a/drivers/net/ethernet/sfc/tc_bindings.c b/drivers/net/ethernet/sfc/tc_bindings.c new file mode 100644 index 000000000..c18d64519 --- /dev/null +++ b/drivers/net/ethernet/sfc/tc_bindings.c @@ -0,0 +1,228 @@ +// SPDX-License-Identifier: GPL-2.0-only +/**************************************************************************** + * Driver for Solarflare network controllers and boards + * Copyright 2022 Xilinx Inc. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published + * by the Free Software Foundation, incorporated herein by reference. + */ + +#include "tc_bindings.h" +#include "tc.h" + +struct efx_tc_block_binding { + struct list_head list; + struct efx_nic *efx; + struct efx_rep *efv; + struct net_device *otherdev; /* may actually be us */ + struct flow_block *block; +}; + +static struct efx_tc_block_binding *efx_tc_find_binding(struct efx_nic *efx, + struct net_device *otherdev) +{ + struct efx_tc_block_binding *binding; + + ASSERT_RTNL(); + list_for_each_entry(binding, &efx->tc->block_list, list) + if (binding->otherdev == otherdev) + return binding; + return NULL; +} + +static int efx_tc_block_cb(enum tc_setup_type type, void *type_data, + void *cb_priv) +{ + struct efx_tc_block_binding *binding = cb_priv; + struct flow_cls_offload *tcf = type_data; + + switch (type) { + case TC_SETUP_CLSFLOWER: + return efx_tc_flower(binding->efx, binding->otherdev, + tcf, binding->efv); + default: + return -EOPNOTSUPP; + } +} + +void efx_tc_block_unbind(void *cb_priv) +{ + struct efx_tc_block_binding *binding = cb_priv; + + list_del(&binding->list); + kfree(binding); +} + +static struct efx_tc_block_binding *efx_tc_create_binding( + struct efx_nic *efx, struct efx_rep *efv, + struct net_device *otherdev, struct flow_block *block) +{ + struct efx_tc_block_binding *binding = kmalloc(sizeof(*binding), GFP_KERNEL); + + if (!binding) + return ERR_PTR(-ENOMEM); + binding->efx = efx; + binding->efv = efv; + binding->otherdev = otherdev; + binding->block = block; + list_add(&binding->list, &efx->tc->block_list); + return binding; +} + +int efx_tc_setup_block(struct net_device *net_dev, struct efx_nic *efx, + struct flow_block_offload *tcb, struct efx_rep *efv) +{ + struct efx_tc_block_binding *binding; + struct flow_block_cb *block_cb; + int rc; + + if (tcb->binder_type != FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS) + return -EOPNOTSUPP; + + if (WARN_ON(!efx->tc)) + return -ENETDOWN; + + switch (tcb->command) { + case FLOW_BLOCK_BIND: + binding = efx_tc_create_binding(efx, efv, net_dev, tcb->block); + if (IS_ERR(binding)) + return PTR_ERR(binding); + block_cb = flow_block_cb_alloc(efx_tc_block_cb, binding, + binding, efx_tc_block_unbind); + rc = PTR_ERR_OR_ZERO(block_cb); + netif_dbg(efx, drv, efx->net_dev, + "bind %sdirect block for device %s, rc %d\n", + net_dev == efx->net_dev ? "" : + efv ? "semi" : "in", + net_dev ? net_dev->name : NULL, rc); + if (rc) { + list_del(&binding->list); + kfree(binding); + } else { + flow_block_cb_add(block_cb, tcb); + } + return rc; + case FLOW_BLOCK_UNBIND: + binding = efx_tc_find_binding(efx, net_dev); + if (binding) { + block_cb = flow_block_cb_lookup(tcb->block, + efx_tc_block_cb, + binding); + if (block_cb) { + flow_block_cb_remove(block_cb, tcb); + netif_dbg(efx, drv, efx->net_dev, + "unbound %sdirect block for device %s\n", + net_dev == efx->net_dev ? "" : + binding->efv ? "semi" : "in", + net_dev ? net_dev->name : NULL); + return 0; + } + } + /* If we're in driver teardown, then we expect to have + * already unbound all our blocks (we did it early while + * we still had MCDI to remove the filters), so getting + * unbind callbacks now isn't a problem. + */ + netif_cond_dbg(efx, drv, efx->net_dev, + !efx->tc->up, warn, + "%sdirect block unbind for device %s, was never bound\n", + net_dev == efx->net_dev ? "" : "in", + net_dev ? net_dev->name : NULL); + return -ENOENT; + default: + return -EOPNOTSUPP; + } +} + +int efx_tc_indr_setup_cb(struct net_device *net_dev, struct Qdisc *sch, + void *cb_priv, enum tc_setup_type type, + void *type_data, void *data, + void (*cleanup)(struct flow_block_cb *block_cb)) +{ + struct flow_block_offload *tcb = type_data; + struct efx_tc_block_binding *binding; + struct flow_block_cb *block_cb; + struct efx_nic *efx = cb_priv; + bool is_ovs_int_port; + int rc; + + if (!net_dev) + return -EOPNOTSUPP; + + if (tcb->binder_type != FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS && + tcb->binder_type != FLOW_BLOCK_BINDER_TYPE_CLSACT_EGRESS) + return -EOPNOTSUPP; + + is_ovs_int_port = netif_is_ovs_master(net_dev); + if (tcb->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_EGRESS && + !is_ovs_int_port) + return -EOPNOTSUPP; + + if (is_ovs_int_port) + return -EOPNOTSUPP; + + switch (type) { + case TC_SETUP_BLOCK: + switch (tcb->command) { + case FLOW_BLOCK_BIND: + binding = efx_tc_create_binding(efx, NULL, net_dev, tcb->block); + if (IS_ERR(binding)) + return PTR_ERR(binding); + block_cb = flow_indr_block_cb_alloc(efx_tc_block_cb, binding, + binding, efx_tc_block_unbind, + tcb, net_dev, sch, data, binding, + cleanup); + rc = PTR_ERR_OR_ZERO(block_cb); + netif_dbg(efx, drv, efx->net_dev, + "bind indr block for device %s, rc %d\n", + net_dev ? net_dev->name : NULL, rc); + if (rc) { + list_del(&binding->list); + kfree(binding); + } else { + flow_block_cb_add(block_cb, tcb); + } + return rc; + case FLOW_BLOCK_UNBIND: + binding = efx_tc_find_binding(efx, net_dev); + if (!binding) + return -ENOENT; + block_cb = flow_block_cb_lookup(tcb->block, + efx_tc_block_cb, + binding); + if (!block_cb) + return -ENOENT; + flow_indr_block_cb_remove(block_cb, tcb); + netif_dbg(efx, drv, efx->net_dev, + "unbind indr block for device %s\n", + net_dev ? net_dev->name : NULL); + return 0; + default: + return -EOPNOTSUPP; + } + default: + return -EOPNOTSUPP; + } +} + +/* .ndo_setup_tc implementation + * Entry point for flower block and filter management. + */ +int efx_tc_setup(struct net_device *net_dev, enum tc_setup_type type, + void *type_data) +{ + struct efx_nic *efx = efx_netdev_priv(net_dev); + + if (efx->type->is_vf) + return -EOPNOTSUPP; + if (!efx->tc) + return -EOPNOTSUPP; + + if (type == TC_SETUP_CLSFLOWER) + return efx_tc_flower(efx, net_dev, type_data, NULL); + if (type == TC_SETUP_BLOCK) + return efx_tc_setup_block(net_dev, efx, type_data, NULL); + + return -EOPNOTSUPP; +} |