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1/* SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause) */2/*3 * Copyright(c) 2020 Intel Corporation.4 *5 */6 7#ifndef HFI1_NETDEV_H8#define HFI1_NETDEV_H9 10#include "hfi.h"11 12#include <linux/netdevice.h>13#include <linux/xarray.h>14 15/**16 * struct hfi1_netdev_rxq - Receive Queue for HFI17 * Both IPoIB and VNIC netdevices will be working on the rx abstraction.18 * @napi: napi object19 * @rx: ptr to netdev_rx20 * @rcd: ptr to receive context data21 */22struct hfi1_netdev_rxq {23 struct napi_struct napi;24 struct hfi1_netdev_rx *rx;25 struct hfi1_ctxtdata *rcd;26};27 28/*29 * Number of netdev contexts used. Ensure it is less than or equal to30 * max queues supported by VNIC (HFI1_VNIC_MAX_QUEUE).31 */32#define HFI1_MAX_NETDEV_CTXTS 833 34/* Number of NETDEV RSM entries */35#define NUM_NETDEV_MAP_ENTRIES HFI1_MAX_NETDEV_CTXTS36 37/**38 * struct hfi1_netdev_rx: data required to setup and run HFI netdev.39 * @rx_napi: the dummy netdevice to support "polling" the receive contexts40 * @dd: hfi1_devdata41 * @rxq: pointer to dummy netdev receive queues.42 * @num_rx_q: number of receive queues43 * @rmt_index: first free index in RMT Array44 * @msix_start: first free MSI-X interrupt vector.45 * @dev_tbl: netdev table for unique identifier VNIC and IPoIb VLANs.46 * @enabled: atomic counter of netdevs enabling receive queues.47 * When 0 NAPI will be disabled.48 * @netdevs: atomic counter of netdevs using dummy netdev.49 * When 0 receive queues will be freed.50 */51struct hfi1_netdev_rx {52 struct net_device *rx_napi;53 struct hfi1_devdata *dd;54 struct hfi1_netdev_rxq *rxq;55 int num_rx_q;56 int rmt_start;57 struct xarray dev_tbl;58 /* count of enabled napi polls */59 atomic_t enabled;60 /* count of netdevs on top */61 atomic_t netdevs;62};63 64static inline65int hfi1_netdev_ctxt_count(struct hfi1_devdata *dd)66{67 return dd->netdev_rx->num_rx_q;68}69 70static inline71struct hfi1_ctxtdata *hfi1_netdev_get_ctxt(struct hfi1_devdata *dd, int ctxt)72{73 return dd->netdev_rx->rxq[ctxt].rcd;74}75 76static inline77int hfi1_netdev_get_free_rmt_idx(struct hfi1_devdata *dd)78{79 return dd->netdev_rx->rmt_start;80}81 82static inline83void hfi1_netdev_set_free_rmt_idx(struct hfi1_devdata *dd, int rmt_idx)84{85 dd->netdev_rx->rmt_start = rmt_idx;86}87 88u32 hfi1_num_netdev_contexts(struct hfi1_devdata *dd, u32 available_contexts,89 struct cpumask *cpu_mask);90 91void hfi1_netdev_enable_queues(struct hfi1_devdata *dd);92void hfi1_netdev_disable_queues(struct hfi1_devdata *dd);93int hfi1_netdev_rx_init(struct hfi1_devdata *dd);94int hfi1_netdev_rx_destroy(struct hfi1_devdata *dd);95int hfi1_alloc_rx(struct hfi1_devdata *dd);96void hfi1_free_rx(struct hfi1_devdata *dd);97int hfi1_netdev_add_data(struct hfi1_devdata *dd, int id, void *data);98void *hfi1_netdev_remove_data(struct hfi1_devdata *dd, int id);99void *hfi1_netdev_get_data(struct hfi1_devdata *dd, int id);100void *hfi1_netdev_get_first_data(struct hfi1_devdata *dd, int *start_id);101 102/* chip.c */103int hfi1_netdev_rx_napi(struct napi_struct *napi, int budget);104 105#endif /* HFI1_NETDEV_H */106