/* SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause) */
/*
* Copyright ( c ) 2020 Intel Corporation .
*
*/
#ifndef HFI1_NETDEV_H
#define HFI1_NETDEV_H
#include "hfi.h"
#include <linux/netdevice.h>
#include <linux/xarray.h>
/**
* struct hfi1_netdev_rxq - Receive Queue for HFI
* Both IPoIB and VNIC netdevices will be working on the rx abstraction .
* @ napi : napi object
* @ rx : ptr to netdev_rx
* @ rcd : ptr to receive context data
*/
struct hfi1_netdev_rxq {
struct napi_struct napi;
struct hfi1_netdev_rx *rx;
struct hfi1_ctxtdata *rcd;
};
/*
* Number of netdev contexts used . Ensure it is less than or equal to
* max queues supported by VNIC ( HFI1_VNIC_MAX_QUEUE ) .
*/
#define HFI1_MAX_NETDEV_CTXTS 8
/* Number of NETDEV RSM entries */
#define NUM_NETDEV_MAP_ENTRIES HFI1_MAX_NETDEV_CTXTS
/**
* struct hfi1_netdev_rx : data required to setup and run HFI netdev .
* @ rx_napi : the dummy netdevice to support " polling " the receive contexts
* @ dd : hfi1_devdata
* @ rxq : pointer to dummy netdev receive queues .
* @ num_rx_q : number of receive queues
* @ rmt_index : first free index in RMT Array
* @ msix_start : first free MSI - X interrupt vector .
* @ dev_tbl : netdev table for unique identifier VNIC and IPoIb VLANs .
* @ enabled : atomic counter of netdevs enabling receive queues .
* When 0 NAPI will be disabled .
* @ netdevs : atomic counter of netdevs using dummy netdev .
* When 0 receive queues will be freed .
*/
struct hfi1_netdev_rx {
struct net_device *rx_napi;
struct hfi1_devdata *dd;
struct hfi1_netdev_rxq *rxq;
int num_rx_q;
int rmt_start;
struct xarray dev_tbl;
/* count of enabled napi polls */
atomic_t enabled;
/* count of netdevs on top */
atomic_t netdevs;
};
static inline
int hfi1_netdev_ctxt_count(struct hfi1_devdata *dd)
{
return dd->netdev_rx->num_rx_q;
}
static inline
struct hfi1_ctxtdata *hfi1_netdev_get_ctxt(struct hfi1_devdata *dd, int ctxt)
{
return dd->netdev_rx->rxq[ctxt].rcd;
}
static inline
int hfi1_netdev_get_free_rmt_idx(struct hfi1_devdata *dd)
{
return dd->netdev_rx->rmt_start;
}
static inline
void hfi1_netdev_set_free_rmt_idx(struct hfi1_devdata *dd, int rmt_idx)
{
dd->netdev_rx->rmt_start = rmt_idx;
}
u32 hfi1_num_netdev_contexts(struct hfi1_devdata *dd, u32 available_contexts,
struct cpumask *cpu_mask);
void hfi1_netdev_enable_queues(struct hfi1_devdata *dd);
void hfi1_netdev_disable_queues(struct hfi1_devdata *dd);
int hfi1_netdev_rx_init(struct hfi1_devdata *dd);
int hfi1_netdev_rx_destroy(struct hfi1_devdata *dd);
int hfi1_alloc_rx(struct hfi1_devdata *dd);
void hfi1_free_rx(struct hfi1_devdata *dd);
int hfi1_netdev_add_data(struct hfi1_devdata *dd, int id, void *data);
void *hfi1_netdev_remove_data(struct hfi1_devdata *dd, int id);
void *hfi1_netdev_get_data(struct hfi1_devdata *dd, int id);
void *hfi1_netdev_get_first_data(struct hfi1_devdata *dd, int *start_id);
/* chip.c */
int hfi1_netdev_rx_napi(struct napi_struct *napi, int budget);
#endif /* HFI1_NETDEV_H */
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(vorverarbeitet am 2026-10-11)
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