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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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