diff options
Diffstat (limited to 'drivers/net/ethernet/intel/idpf/xdp.h')
| -rw-r--r-- | drivers/net/ethernet/intel/idpf/xdp.h | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/idpf/xdp.h b/drivers/net/ethernet/intel/idpf/xdp.h new file mode 100644 index 000000000000..479f5ef3c604 --- /dev/null +++ b/drivers/net/ethernet/intel/idpf/xdp.h @@ -0,0 +1,175 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* Copyright (C) 2025 Intel Corporation */ + +#ifndef _IDPF_XDP_H_ +#define _IDPF_XDP_H_ + +#include <net/libeth/xdp.h> + +#include "idpf_txrx.h" + +int idpf_xdp_rxq_info_init(struct idpf_rx_queue *rxq); +int idpf_xdp_rxq_info_init_all(const struct idpf_vport *vport); +void idpf_xdp_rxq_info_deinit(struct idpf_rx_queue *rxq, u32 model); +void idpf_xdp_rxq_info_deinit_all(const struct idpf_vport *vport); +void idpf_xdp_copy_prog_to_rqs(const struct idpf_vport *vport, + struct bpf_prog *xdp_prog); + +int idpf_xdpsqs_get(const struct idpf_vport *vport); +void idpf_xdpsqs_put(const struct idpf_vport *vport); + +u32 idpf_xdpsq_poll(struct idpf_tx_queue *xdpsq, u32 budget); +bool idpf_xdp_tx_flush_bulk(struct libeth_xdp_tx_bulk *bq, u32 flags); + +/** + * idpf_xdp_tx_xmit - produce a single HW Tx descriptor out of XDP desc + * @desc: XDP descriptor to pull the DMA address and length from + * @i: descriptor index on the queue to fill + * @sq: XDP queue to produce the HW Tx descriptor on + * @priv: &xsk_tx_metadata_ops on XSk xmit or %NULL + */ +static inline void idpf_xdp_tx_xmit(struct libeth_xdp_tx_desc desc, u32 i, + const struct libeth_xdpsq *sq, u64 priv) +{ + struct idpf_flex_tx_desc *tx_desc = sq->descs; + u32 cmd; + + cmd = FIELD_PREP(IDPF_FLEX_TXD_QW1_DTYPE_M, + IDPF_TX_DESC_DTYPE_FLEX_L2TAG1_L2TAG2); + if (desc.flags & LIBETH_XDP_TX_LAST) + cmd |= FIELD_PREP(IDPF_FLEX_TXD_QW1_CMD_M, + IDPF_TX_DESC_CMD_EOP); + if (priv && (desc.flags & LIBETH_XDP_TX_CSUM)) + cmd |= FIELD_PREP(IDPF_FLEX_TXD_QW1_CMD_M, + IDPF_TX_FLEX_DESC_CMD_CS_EN); + + tx_desc = &tx_desc[i]; + tx_desc->buf_addr = cpu_to_le64(desc.addr); +#ifdef __LIBETH_WORD_ACCESS + *(u64 *)&tx_desc->qw1 = ((u64)desc.len << 48) | cmd; +#else + tx_desc->qw1.buf_size = cpu_to_le16(desc.len); + tx_desc->qw1.cmd_dtype = cpu_to_le16(cmd); +#endif +} + +static inline void idpf_xdpsq_set_rs(const struct idpf_tx_queue *xdpsq) +{ + u32 ntu, cmd; + + ntu = xdpsq->next_to_use; + if (unlikely(!ntu)) + ntu = xdpsq->desc_count; + + cmd = FIELD_PREP(IDPF_FLEX_TXD_QW1_CMD_M, IDPF_TX_DESC_CMD_RS); +#ifdef __LIBETH_WORD_ACCESS + *(u64 *)&xdpsq->flex_tx[ntu - 1].q.qw1 |= cmd; +#else + xdpsq->flex_tx[ntu - 1].q.qw1.cmd_dtype |= cpu_to_le16(cmd); +#endif +} + +static inline void idpf_xdpsq_update_tail(const struct idpf_tx_queue *xdpsq) +{ + dma_wmb(); + writel_relaxed(xdpsq->next_to_use, xdpsq->tail); +} + +/** + * idpf_xdp_tx_finalize - finalize sending over XDPSQ + * @_xdpsq: XDP Tx queue + * @sent: whether any frames were sent + * @flush: whether to update RS bit and the tail register + * + * Set the RS bit ("end of batch"), bump the tail, and queue the cleanup timer. + * To be called after a NAPI polling loop, at the end of .ndo_xdp_xmit() etc. + */ +static inline void idpf_xdp_tx_finalize(void *_xdpsq, bool sent, bool flush) +{ + struct idpf_tx_queue *xdpsq = _xdpsq; + + if ((!flush || unlikely(!sent)) && + likely(xdpsq->desc_count - 1 != xdpsq->pending)) + return; + + libeth_xdpsq_lock(&xdpsq->xdp_lock); + + idpf_xdpsq_set_rs(xdpsq); + idpf_xdpsq_update_tail(xdpsq); + + libeth_xdpsq_queue_timer(xdpsq->timer); + + libeth_xdpsq_unlock(&xdpsq->xdp_lock); +} + +struct idpf_xdp_rx_desc { + aligned_u64 qw0; +#define IDPF_XDP_RX_BUFQ BIT_ULL(47) +#define IDPF_XDP_RX_GEN BIT_ULL(46) +#define IDPF_XDP_RX_LEN GENMASK_ULL(45, 32) +#define IDPF_XDP_RX_PT GENMASK_ULL(25, 16) + + aligned_u64 qw1; +#define IDPF_XDP_RX_BUF GENMASK_ULL(47, 32) +#define IDPF_XDP_RX_EOP BIT_ULL(1) + + aligned_u64 qw2; +#define IDPF_XDP_RX_HASH GENMASK_ULL(31, 0) + + aligned_u64 qw3; +} __aligned(4 * sizeof(u64)); +static_assert(sizeof(struct idpf_xdp_rx_desc) == + sizeof(struct virtchnl2_rx_flex_desc_adv_nic_3)); + +#define idpf_xdp_rx_bufq(desc) !!((desc)->qw0 & IDPF_XDP_RX_BUFQ) +#define idpf_xdp_rx_gen(desc) !!((desc)->qw0 & IDPF_XDP_RX_GEN) +#define idpf_xdp_rx_len(desc) FIELD_GET(IDPF_XDP_RX_LEN, (desc)->qw0) +#define idpf_xdp_rx_pt(desc) FIELD_GET(IDPF_XDP_RX_PT, (desc)->qw0) +#define idpf_xdp_rx_buf(desc) FIELD_GET(IDPF_XDP_RX_BUF, (desc)->qw1) +#define idpf_xdp_rx_eop(desc) !!((desc)->qw1 & IDPF_XDP_RX_EOP) +#define idpf_xdp_rx_hash(desc) FIELD_GET(IDPF_XDP_RX_HASH, (desc)->qw2) + +static inline void +idpf_xdp_get_qw0(struct idpf_xdp_rx_desc *desc, + const struct virtchnl2_rx_flex_desc_adv_nic_3 *rxd) +{ +#ifdef __LIBETH_WORD_ACCESS + desc->qw0 = ((const typeof(desc))rxd)->qw0; +#else + desc->qw0 = ((u64)le16_to_cpu(rxd->pktlen_gen_bufq_id) << 32) | + ((u64)le16_to_cpu(rxd->ptype_err_fflags0) << 16); +#endif +} + +static inline void +idpf_xdp_get_qw1(struct idpf_xdp_rx_desc *desc, + const struct virtchnl2_rx_flex_desc_adv_nic_3 *rxd) +{ +#ifdef __LIBETH_WORD_ACCESS + desc->qw1 = ((const typeof(desc))rxd)->qw1; +#else + desc->qw1 = ((u64)le16_to_cpu(rxd->buf_id) << 32) | + rxd->status_err0_qw1; +#endif +} + +static inline void +idpf_xdp_get_qw2(struct idpf_xdp_rx_desc *desc, + const struct virtchnl2_rx_flex_desc_adv_nic_3 *rxd) +{ +#ifdef __LIBETH_WORD_ACCESS + desc->qw2 = ((const typeof(desc))rxd)->qw2; +#else + desc->qw2 = ((u64)rxd->hash3 << 24) | + ((u64)rxd->ff2_mirrid_hash2.hash2 << 16) | + le16_to_cpu(rxd->hash1); +#endif +} + +void idpf_xdp_set_features(const struct idpf_vport *vport); + +int idpf_xdp(struct net_device *dev, struct netdev_bpf *xdp); +int idpf_xdp_xmit(struct net_device *dev, int n, struct xdp_frame **frames, + u32 flags); + +#endif /* _IDPF_XDP_H_ */ |