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67d2656b48
Add support for RX VLAN ctag/stag strip
which may be configured via ethtool.
e.g.
# ethtool -K $DEV rx-vlan-offload on
# ethtool -K $DEV rx-vlan-stag-hw-parse on
Ctag-stripped and stag-stripped cannot be enabled at the same time
because currently the kernel supports only one layer of VLAN stripping.
The NIC supplies VLAN strip information as packet metadata.
The fields of this VLAN metadata are:
* strip flag: 1 for stripped; 0 for unstripped
* tci: VLAN TCI ID
* tpid: 1 for ETH_P_8021AD; 0 for ETH_P_8021Q
Configuration control bits NFP_NET_CFG_CTRL_RXVLAN_V2 and
NFP_NET_CFG_CTRL_RXQINQ are to signal availability of
ctag-strip and stag-strip features of the firmware.
Signed-off-by: Diana Wang <na.wang@corigine.com>
Reviewed-by: Louis Peens <louis.peens@corigine.com>
Signed-off-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
219 lines
6.7 KiB
C
219 lines
6.7 KiB
C
/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */
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/* Copyright (C) 2019 Netronome Systems, Inc. */
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#ifndef _NFP_NET_DP_
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#define _NFP_NET_DP_
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#include "nfp_net.h"
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static inline dma_addr_t nfp_net_dma_map_rx(struct nfp_net_dp *dp, void *frag)
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{
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return dma_map_single_attrs(dp->dev, frag + NFP_NET_RX_BUF_HEADROOM,
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dp->fl_bufsz - NFP_NET_RX_BUF_NON_DATA,
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dp->rx_dma_dir, DMA_ATTR_SKIP_CPU_SYNC);
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}
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static inline void
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nfp_net_dma_sync_dev_rx(const struct nfp_net_dp *dp, dma_addr_t dma_addr)
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{
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dma_sync_single_for_device(dp->dev, dma_addr,
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dp->fl_bufsz - NFP_NET_RX_BUF_NON_DATA,
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dp->rx_dma_dir);
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}
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static inline void nfp_net_dma_unmap_rx(struct nfp_net_dp *dp,
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dma_addr_t dma_addr)
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{
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dma_unmap_single_attrs(dp->dev, dma_addr,
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dp->fl_bufsz - NFP_NET_RX_BUF_NON_DATA,
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dp->rx_dma_dir, DMA_ATTR_SKIP_CPU_SYNC);
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}
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static inline void nfp_net_dma_sync_cpu_rx(struct nfp_net_dp *dp,
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dma_addr_t dma_addr,
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unsigned int len)
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{
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dma_sync_single_for_cpu(dp->dev, dma_addr - NFP_NET_RX_BUF_HEADROOM,
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len, dp->rx_dma_dir);
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}
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/**
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* nfp_net_tx_full() - check if the TX ring is full
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* @tx_ring: TX ring to check
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* @dcnt: Number of descriptors that need to be enqueued (must be >= 1)
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*
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* This function checks, based on the *host copy* of read/write
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* pointer if a given TX ring is full. The real TX queue may have
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* some newly made available slots.
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*
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* Return: True if the ring is full.
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*/
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static inline int nfp_net_tx_full(struct nfp_net_tx_ring *tx_ring, int dcnt)
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{
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return (tx_ring->wr_p - tx_ring->rd_p) >= (tx_ring->cnt - dcnt);
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}
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static inline void nfp_net_tx_xmit_more_flush(struct nfp_net_tx_ring *tx_ring)
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{
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wmb(); /* drain writebuffer */
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nfp_qcp_wr_ptr_add(tx_ring->qcp_q, tx_ring->wr_ptr_add);
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tx_ring->wr_ptr_add = 0;
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}
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static inline u32
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nfp_net_read_tx_cmpl(struct nfp_net_tx_ring *tx_ring, struct nfp_net_dp *dp)
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{
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if (tx_ring->txrwb)
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return *tx_ring->txrwb;
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return nfp_qcp_rd_ptr_read(tx_ring->qcp_q);
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}
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static inline void nfp_net_free_frag(void *frag, bool xdp)
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{
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if (!xdp)
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skb_free_frag(frag);
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else
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__free_page(virt_to_page(frag));
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}
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/**
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* nfp_net_irq_unmask() - Unmask automasked interrupt
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* @nn: NFP Network structure
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* @entry_nr: MSI-X table entry
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*
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* Clear the ICR for the IRQ entry.
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*/
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static inline void nfp_net_irq_unmask(struct nfp_net *nn, unsigned int entry_nr)
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{
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nn_writeb(nn, NFP_NET_CFG_ICR(entry_nr), NFP_NET_CFG_ICR_UNMASKED);
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nn_pci_flush(nn);
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}
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struct seq_file;
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/* Common */
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void
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nfp_net_rx_ring_hw_cfg_write(struct nfp_net *nn,
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struct nfp_net_rx_ring *rx_ring, unsigned int idx);
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void
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nfp_net_tx_ring_hw_cfg_write(struct nfp_net *nn,
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struct nfp_net_tx_ring *tx_ring, unsigned int idx);
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void nfp_net_vec_clear_ring_data(struct nfp_net *nn, unsigned int idx);
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void *nfp_net_rx_alloc_one(struct nfp_net_dp *dp, dma_addr_t *dma_addr);
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int nfp_net_rx_rings_prepare(struct nfp_net *nn, struct nfp_net_dp *dp);
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int nfp_net_tx_rings_prepare(struct nfp_net *nn, struct nfp_net_dp *dp);
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void nfp_net_rx_rings_free(struct nfp_net_dp *dp);
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void nfp_net_tx_rings_free(struct nfp_net_dp *dp);
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void nfp_net_rx_ring_reset(struct nfp_net_rx_ring *rx_ring);
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bool nfp_net_vlan_strip(struct sk_buff *skb, const struct nfp_net_rx_desc *rxd,
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const struct nfp_meta_parsed *meta);
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enum nfp_nfd_version {
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NFP_NFD_VER_NFD3,
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NFP_NFD_VER_NFDK,
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};
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/**
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* struct nfp_dp_ops - Hooks to wrap different implementation of different dp
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* @version: Indicate dp type
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* @tx_min_desc_per_pkt: Minimal TX descs needed for each packet
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* @cap_mask: Mask of supported features
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* @dma_mask: DMA addressing capability
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* @poll: Napi poll for normal rx/tx
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* @xsk_poll: Napi poll when xsk is enabled
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* @ctrl_poll: Tasklet poll for ctrl rx/tx
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* @xmit: Xmit for normal path
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* @ctrl_tx_one: Xmit for ctrl path
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* @rx_ring_fill_freelist: Give buffers from the ring to FW
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* @tx_ring_alloc: Allocate resource for a TX ring
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* @tx_ring_reset: Free any untransmitted buffers and reset pointers
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* @tx_ring_free: Free resources allocated to a TX ring
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* @tx_ring_bufs_alloc: Allocate resource for each TX buffer
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* @tx_ring_bufs_free: Free resources allocated to each TX buffer
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* @print_tx_descs: Show TX ring's info for debug purpose
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*/
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struct nfp_dp_ops {
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enum nfp_nfd_version version;
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unsigned int tx_min_desc_per_pkt;
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u32 cap_mask;
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u64 dma_mask;
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int (*poll)(struct napi_struct *napi, int budget);
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int (*xsk_poll)(struct napi_struct *napi, int budget);
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void (*ctrl_poll)(struct tasklet_struct *t);
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netdev_tx_t (*xmit)(struct sk_buff *skb, struct net_device *netdev);
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bool (*ctrl_tx_one)(struct nfp_net *nn, struct nfp_net_r_vector *r_vec,
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struct sk_buff *skb, bool old);
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void (*rx_ring_fill_freelist)(struct nfp_net_dp *dp,
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struct nfp_net_rx_ring *rx_ring);
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int (*tx_ring_alloc)(struct nfp_net_dp *dp,
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struct nfp_net_tx_ring *tx_ring);
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void (*tx_ring_reset)(struct nfp_net_dp *dp,
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struct nfp_net_tx_ring *tx_ring);
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void (*tx_ring_free)(struct nfp_net_tx_ring *tx_ring);
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int (*tx_ring_bufs_alloc)(struct nfp_net_dp *dp,
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struct nfp_net_tx_ring *tx_ring);
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void (*tx_ring_bufs_free)(struct nfp_net_dp *dp,
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struct nfp_net_tx_ring *tx_ring);
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void (*print_tx_descs)(struct seq_file *file,
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struct nfp_net_r_vector *r_vec,
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struct nfp_net_tx_ring *tx_ring,
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u32 d_rd_p, u32 d_wr_p);
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};
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static inline void
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nfp_net_tx_ring_reset(struct nfp_net_dp *dp, struct nfp_net_tx_ring *tx_ring)
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{
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return dp->ops->tx_ring_reset(dp, tx_ring);
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}
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static inline void
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nfp_net_rx_ring_fill_freelist(struct nfp_net_dp *dp,
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struct nfp_net_rx_ring *rx_ring)
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{
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dp->ops->rx_ring_fill_freelist(dp, rx_ring);
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}
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static inline int
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nfp_net_tx_ring_alloc(struct nfp_net_dp *dp, struct nfp_net_tx_ring *tx_ring)
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{
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return dp->ops->tx_ring_alloc(dp, tx_ring);
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}
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static inline void
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nfp_net_tx_ring_free(struct nfp_net_dp *dp, struct nfp_net_tx_ring *tx_ring)
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{
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dp->ops->tx_ring_free(tx_ring);
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}
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static inline int
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nfp_net_tx_ring_bufs_alloc(struct nfp_net_dp *dp,
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struct nfp_net_tx_ring *tx_ring)
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{
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return dp->ops->tx_ring_bufs_alloc(dp, tx_ring);
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}
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static inline void
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nfp_net_tx_ring_bufs_free(struct nfp_net_dp *dp,
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struct nfp_net_tx_ring *tx_ring)
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{
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dp->ops->tx_ring_bufs_free(dp, tx_ring);
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}
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static inline void
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nfp_net_debugfs_print_tx_descs(struct seq_file *file, struct nfp_net_dp *dp,
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struct nfp_net_r_vector *r_vec,
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struct nfp_net_tx_ring *tx_ring,
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u32 d_rd_p, u32 d_wr_p)
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{
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dp->ops->print_tx_descs(file, r_vec, tx_ring, d_rd_p, d_wr_p);
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}
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extern const struct nfp_dp_ops nfp_nfd3_ops;
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extern const struct nfp_dp_ops nfp_nfdk_ops;
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netdev_tx_t nfp_net_tx(struct sk_buff *skb, struct net_device *netdev);
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#endif /* _NFP_NET_DP_ */
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