diff options
Diffstat (limited to 'drivers/net/ethernet/netronome/nfp/nfp_net_dp.h')
| -rw-r--r-- | drivers/net/ethernet/netronome/nfp/nfp_net_dp.h | 219 |
1 files changed, 219 insertions, 0 deletions
diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_dp.h b/drivers/net/ethernet/netronome/nfp/nfp_net_dp.h new file mode 100644 index 000000000000..831c83ce0d3d --- /dev/null +++ b/drivers/net/ethernet/netronome/nfp/nfp_net_dp.h @@ -0,0 +1,219 @@ +/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */ +/* Copyright (C) 2019 Netronome Systems, Inc. */ + +#ifndef _NFP_NET_DP_ +#define _NFP_NET_DP_ + +#include "nfp_net.h" + +static inline dma_addr_t nfp_net_dma_map_rx(struct nfp_net_dp *dp, void *frag) +{ + return dma_map_single_attrs(dp->dev, frag + NFP_NET_RX_BUF_HEADROOM, + dp->fl_bufsz - NFP_NET_RX_BUF_NON_DATA, + dp->rx_dma_dir, DMA_ATTR_SKIP_CPU_SYNC); +} + +static inline void +nfp_net_dma_sync_dev_rx(const struct nfp_net_dp *dp, dma_addr_t dma_addr) +{ + dma_sync_single_for_device(dp->dev, dma_addr, + dp->fl_bufsz - NFP_NET_RX_BUF_NON_DATA, + dp->rx_dma_dir); +} + +static inline void nfp_net_dma_unmap_rx(struct nfp_net_dp *dp, + dma_addr_t dma_addr) +{ + dma_unmap_single_attrs(dp->dev, dma_addr, + dp->fl_bufsz - NFP_NET_RX_BUF_NON_DATA, + dp->rx_dma_dir, DMA_ATTR_SKIP_CPU_SYNC); +} + +static inline void nfp_net_dma_sync_cpu_rx(struct nfp_net_dp *dp, + dma_addr_t dma_addr, + unsigned int len) +{ + dma_sync_single_for_cpu(dp->dev, dma_addr - NFP_NET_RX_BUF_HEADROOM, + len, dp->rx_dma_dir); +} + +/** + * nfp_net_tx_full() - check if the TX ring is full + * @tx_ring: TX ring to check + * @dcnt: Number of descriptors that need to be enqueued (must be >= 1) + * + * This function checks, based on the *host copy* of read/write + * pointer if a given TX ring is full. The real TX queue may have + * some newly made available slots. + * + * Return: True if the ring is full. + */ +static inline int nfp_net_tx_full(struct nfp_net_tx_ring *tx_ring, int dcnt) +{ + return (tx_ring->wr_p - tx_ring->rd_p) >= (tx_ring->cnt - dcnt); +} + +static inline void nfp_net_tx_xmit_more_flush(struct nfp_net_tx_ring *tx_ring) +{ + wmb(); /* drain writebuffer */ + nfp_qcp_wr_ptr_add(tx_ring->qcp_q, tx_ring->wr_ptr_add); + tx_ring->wr_ptr_add = 0; +} + +static inline u32 +nfp_net_read_tx_cmpl(struct nfp_net_tx_ring *tx_ring, struct nfp_net_dp *dp) +{ + if (tx_ring->txrwb) + return *tx_ring->txrwb; + return nfp_qcp_rd_ptr_read(tx_ring->qcp_q); +} + +static inline void nfp_net_free_frag(void *frag, bool xdp) +{ + if (!xdp) + skb_free_frag(frag); + else + __free_page(virt_to_page(frag)); +} + +/** + * nfp_net_irq_unmask() - Unmask automasked interrupt + * @nn: NFP Network structure + * @entry_nr: MSI-X table entry + * + * Clear the ICR for the IRQ entry. + */ +static inline void nfp_net_irq_unmask(struct nfp_net *nn, unsigned int entry_nr) +{ + nn_writeb(nn, NFP_NET_CFG_ICR(entry_nr), NFP_NET_CFG_ICR_UNMASKED); + nn_pci_flush(nn); +} + +struct seq_file; + +/* Common */ +void +nfp_net_rx_ring_hw_cfg_write(struct nfp_net *nn, + struct nfp_net_rx_ring *rx_ring, unsigned int idx); +void +nfp_net_tx_ring_hw_cfg_write(struct nfp_net *nn, + struct nfp_net_tx_ring *tx_ring, unsigned int idx); +void nfp_net_vec_clear_ring_data(struct nfp_net *nn, unsigned int idx); + +void *nfp_net_rx_alloc_one(struct nfp_net_dp *dp, dma_addr_t *dma_addr); +int nfp_net_rx_rings_prepare(struct nfp_net *nn, struct nfp_net_dp *dp); +int nfp_net_tx_rings_prepare(struct nfp_net *nn, struct nfp_net_dp *dp); +void nfp_net_rx_rings_free(struct nfp_net_dp *dp); +void nfp_net_tx_rings_free(struct nfp_net_dp *dp); +void nfp_net_rx_ring_reset(struct nfp_net_rx_ring *rx_ring); +bool nfp_net_vlan_strip(struct sk_buff *skb, const struct nfp_net_rx_desc *rxd, + const struct nfp_meta_parsed *meta); + +enum nfp_nfd_version { + NFP_NFD_VER_NFD3, + NFP_NFD_VER_NFDK, +}; + +/** + * struct nfp_dp_ops - Hooks to wrap different implementation of different dp + * @version: Indicate dp type + * @tx_min_desc_per_pkt: Minimal TX descs needed for each packet + * @cap_mask: Mask of supported features + * @dma_mask: DMA addressing capability + * @poll: Napi poll for normal rx/tx + * @xsk_poll: Napi poll when xsk is enabled + * @ctrl_poll: Tasklet poll for ctrl rx/tx + * @xmit: Xmit for normal path + * @ctrl_tx_one: Xmit for ctrl path + * @rx_ring_fill_freelist: Give buffers from the ring to FW + * @tx_ring_alloc: Allocate resource for a TX ring + * @tx_ring_reset: Free any untransmitted buffers and reset pointers + * @tx_ring_free: Free resources allocated to a TX ring + * @tx_ring_bufs_alloc: Allocate resource for each TX buffer + * @tx_ring_bufs_free: Free resources allocated to each TX buffer + * @print_tx_descs: Show TX ring's info for debug purpose + */ +struct nfp_dp_ops { + enum nfp_nfd_version version; + unsigned int tx_min_desc_per_pkt; + u32 cap_mask; + u64 dma_mask; + + int (*poll)(struct napi_struct *napi, int budget); + int (*xsk_poll)(struct napi_struct *napi, int budget); + void (*ctrl_poll)(struct tasklet_struct *t); + netdev_tx_t (*xmit)(struct sk_buff *skb, struct net_device *netdev); + bool (*ctrl_tx_one)(struct nfp_net *nn, struct nfp_net_r_vector *r_vec, + struct sk_buff *skb, bool old); + void (*rx_ring_fill_freelist)(struct nfp_net_dp *dp, + struct nfp_net_rx_ring *rx_ring); + int (*tx_ring_alloc)(struct nfp_net_dp *dp, + struct nfp_net_tx_ring *tx_ring); + void (*tx_ring_reset)(struct nfp_net_dp *dp, + struct nfp_net_tx_ring *tx_ring); + void (*tx_ring_free)(struct nfp_net_tx_ring *tx_ring); + int (*tx_ring_bufs_alloc)(struct nfp_net_dp *dp, + struct nfp_net_tx_ring *tx_ring); + void (*tx_ring_bufs_free)(struct nfp_net_dp *dp, + struct nfp_net_tx_ring *tx_ring); + + void (*print_tx_descs)(struct seq_file *file, + struct nfp_net_r_vector *r_vec, + struct nfp_net_tx_ring *tx_ring, + u32 d_rd_p, u32 d_wr_p); +}; + +static inline void +nfp_net_tx_ring_reset(struct nfp_net_dp *dp, struct nfp_net_tx_ring *tx_ring) +{ + return dp->ops->tx_ring_reset(dp, tx_ring); +} + +static inline void +nfp_net_rx_ring_fill_freelist(struct nfp_net_dp *dp, + struct nfp_net_rx_ring *rx_ring) +{ + dp->ops->rx_ring_fill_freelist(dp, rx_ring); +} + +static inline int +nfp_net_tx_ring_alloc(struct nfp_net_dp *dp, struct nfp_net_tx_ring *tx_ring) +{ + return dp->ops->tx_ring_alloc(dp, tx_ring); +} + +static inline void +nfp_net_tx_ring_free(struct nfp_net_dp *dp, struct nfp_net_tx_ring *tx_ring) +{ + dp->ops->tx_ring_free(tx_ring); +} + +static inline int +nfp_net_tx_ring_bufs_alloc(struct nfp_net_dp *dp, + struct nfp_net_tx_ring *tx_ring) +{ + return dp->ops->tx_ring_bufs_alloc(dp, tx_ring); +} + +static inline void +nfp_net_tx_ring_bufs_free(struct nfp_net_dp *dp, + struct nfp_net_tx_ring *tx_ring) +{ + dp->ops->tx_ring_bufs_free(dp, tx_ring); +} + +static inline void +nfp_net_debugfs_print_tx_descs(struct seq_file *file, struct nfp_net_dp *dp, + struct nfp_net_r_vector *r_vec, + struct nfp_net_tx_ring *tx_ring, + u32 d_rd_p, u32 d_wr_p) +{ + dp->ops->print_tx_descs(file, r_vec, tx_ring, d_rd_p, d_wr_p); +} + +extern const struct nfp_dp_ops nfp_nfd3_ops; +extern const struct nfp_dp_ops nfp_nfdk_ops; + +netdev_tx_t nfp_net_tx(struct sk_buff *skb, struct net_device *netdev); + +#endif /* _NFP_NET_DP_ */ |