/* 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_ */
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