86 lines
1.9 KiB
C
86 lines
1.9 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright (C) 2022 Gerhard Engleder <gerhard@engleder-embedded.com> */
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#include <linux/if_vlan.h>
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#include <net/xdp_sock_drv.h>
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#include "tsnep.h"
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int tsnep_xdp_setup_prog(struct tsnep_adapter *adapter, struct bpf_prog *prog,
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struct netlink_ext_ack *extack)
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{
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struct bpf_prog *old_prog;
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old_prog = xchg(&adapter->xdp_prog, prog);
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if (old_prog)
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bpf_prog_put(old_prog);
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return 0;
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}
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static int tsnep_xdp_enable_pool(struct tsnep_adapter *adapter,
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struct xsk_buff_pool *pool, u16 queue_id)
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{
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struct tsnep_queue *queue;
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int retval;
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if (queue_id >= adapter->num_rx_queues ||
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queue_id >= adapter->num_tx_queues)
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return -EINVAL;
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queue = &adapter->queue[queue_id];
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if (queue->rx->queue_index != queue_id ||
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queue->tx->queue_index != queue_id) {
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netdev_err(adapter->netdev,
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"XSK support only for TX/RX queue pairs\n");
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return -EOPNOTSUPP;
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}
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retval = xsk_pool_dma_map(pool, adapter->dmadev,
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DMA_ATTR_SKIP_CPU_SYNC);
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if (retval) {
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netdev_err(adapter->netdev, "failed to map XSK pool\n");
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return retval;
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}
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retval = tsnep_enable_xsk(queue, pool);
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if (retval) {
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xsk_pool_dma_unmap(pool, DMA_ATTR_SKIP_CPU_SYNC);
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return retval;
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}
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return 0;
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}
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static int tsnep_xdp_disable_pool(struct tsnep_adapter *adapter, u16 queue_id)
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{
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struct xsk_buff_pool *pool;
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struct tsnep_queue *queue;
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if (queue_id >= adapter->num_rx_queues ||
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queue_id >= adapter->num_tx_queues)
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return -EINVAL;
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pool = xsk_get_pool_from_qid(adapter->netdev, queue_id);
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if (!pool)
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return -EINVAL;
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queue = &adapter->queue[queue_id];
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tsnep_disable_xsk(queue);
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xsk_pool_dma_unmap(pool, DMA_ATTR_SKIP_CPU_SYNC);
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return 0;
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}
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int tsnep_xdp_setup_pool(struct tsnep_adapter *adapter,
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struct xsk_buff_pool *pool, u16 queue_id)
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{
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return pool ? tsnep_xdp_enable_pool(adapter, pool, queue_id) :
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tsnep_xdp_disable_pool(adapter, queue_id);
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}
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