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/* SPDX-License-Identifier: GPL-2.0-only */
/* Copyright (C) 2024-2025 Intel Corporation */
#ifndef __LIBETH_TYPES_H
#define __LIBETH_TYPES_H
#include <linux/workqueue.h>
/* Stats */
/**
* struct libeth_rq_napi_stats - "hot" counters to update in Rx polling loop
* @packets: received frames counter
* @bytes: sum of bytes of received frames above
* @fragments: sum of fragments of received S/G frames
* @hsplit: number of frames the device performed the header split for
* @raw: alias to access all the fields as an array
*/
struct libeth_rq_napi_stats {
union {
struct {
u32 packets;
u32 bytes;
u32 fragments;
u32 hsplit;
};
DECLARE_FLEX_ARRAY(u32, raw);
};
};
/**
* struct libeth_sq_napi_stats - "hot" counters to update in Tx completion loop
* @packets: completed frames counter
* @bytes: sum of bytes of completed frames above
* @raw: alias to access all the fields as an array
*/
struct libeth_sq_napi_stats {
union {
struct {
u32 packets;
u32 bytes;
};
DECLARE_FLEX_ARRAY(u32, raw);
};
};
/**
* struct libeth_xdpsq_napi_stats - "hot" counters to update in XDP Tx
* completion loop
* @packets: completed frames counter
* @bytes: sum of bytes of completed frames above
* @fragments: sum of fragments of completed S/G frames
* @raw: alias to access all the fields as an array
*/
struct libeth_xdpsq_napi_stats {
union {
struct {
u32 packets;
u32 bytes;
u32 fragments;
};
DECLARE_FLEX_ARRAY(u32, raw);
};
};
/* XDP */
/*
* The following structures should be embedded into driver's queue structure
* and passed to the libeth_xdp helpers, never used directly.
*/
/* XDPSQ sharing */
/**
* struct libeth_xdpsq_lock - locking primitive for sharing XDPSQs
* @lock: spinlock for locking the queue
* @share: whether this particular queue is shared
*/
struct libeth_xdpsq_lock {
spinlock_t lock;
bool share;
};
/* XDPSQ clean-up timers */
/**
* struct libeth_xdpsq_timer - timer for cleaning up XDPSQs w/o interrupts
* @xdpsq: queue this timer belongs to
* @lock: lock for the queue
* @dwork: work performing cleanups
*
* XDPSQs not using interrupts but lazy cleaning, i.e. only when there's no
* space for sending the current queued frame/bulk, must fire up timers to
* make sure there are no stale buffers to free.
*/
struct libeth_xdpsq_timer {
void *xdpsq;
struct libeth_xdpsq_lock *lock;
struct delayed_work dwork;
};
/* Rx polling path */
/**
* struct libeth_xdp_buff_stash - struct for stashing &xdp_buff onto a queue
* @data: pointer to the start of the frame, xdp_buff.data
* @headroom: frame headroom, xdp_buff.data - xdp_buff.data_hard_start
* @len: frame linear space length, xdp_buff.data_end - xdp_buff.data
* @frame_sz: truesize occupied by the frame, xdp_buff.frame_sz
* @flags: xdp_buff.flags
*
* &xdp_buff is 56 bytes long on x64, &libeth_xdp_buff is 64 bytes. This
* structure carries only necessary fields to save/restore a partially built
* frame on the queue structure to finish it during the next NAPI poll.
*/
struct libeth_xdp_buff_stash {
void *data;
u16 headroom;
u16 len;
u32 frame_sz:24;
u32 flags:8;
} __aligned_largest;
#endif /* __LIBETH_TYPES_H */
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