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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 | /* 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 */ |