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/* 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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