Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 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_H |
| 8 | #define HFI1_NETDEV_H |
| 9 | |
| 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 HFI |
| 17 | * dummy netdev. Both IPoIB and VNIC netdevices will be working on |
| 18 | * top of this device. |
| 19 | * @napi: napi object |
| 20 | * @priv: ptr to netdev_priv |
| 21 | * @rcd: ptr to receive context data |
| 22 | */ |
| 23 | struct hfi1_netdev_rxq { |
| 24 | struct napi_struct napi; |
| 25 | struct hfi1_netdev_priv *priv; |
| 26 | struct hfi1_ctxtdata *rcd; |
| 27 | }; |
| 28 | |
| 29 | /* |
| 30 | * Number of netdev contexts used. Ensure it is less than or equal to |
| 31 | * max queues supported by VNIC (HFI1_VNIC_MAX_QUEUE). |
| 32 | */ |
| 33 | #define HFI1_MAX_NETDEV_CTXTS 8 |
| 34 | |
| 35 | /* Number of NETDEV RSM entries */ |
| 36 | #define NUM_NETDEV_MAP_ENTRIES HFI1_MAX_NETDEV_CTXTS |
| 37 | |
| 38 | /** |
| 39 | * struct hfi1_netdev_priv: data required to setup and run HFI netdev. |
| 40 | * @dd: hfi1_devdata |
| 41 | * @rxq: pointer to dummy netdev receive queues. |
| 42 | * @num_rx_q: number of receive queues |
| 43 | * @rmt_index: first free index in RMT Array |
| 44 | * @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 | */ |
| 51 | struct hfi1_netdev_priv { |
| 52 | struct hfi1_devdata *dd; |
| 53 | struct hfi1_netdev_rxq *rxq; |
| 54 | int num_rx_q; |
| 55 | int rmt_start; |
| 56 | struct xarray dev_tbl; |
| 57 | /* count of enabled napi polls */ |
| 58 | atomic_t enabled; |
| 59 | /* count of netdevs on top */ |
| 60 | atomic_t netdevs; |
| 61 | }; |
| 62 | |
| 63 | static inline |
| 64 | struct hfi1_netdev_priv *hfi1_netdev_priv(struct net_device *dev) |
| 65 | { |
| 66 | return (struct hfi1_netdev_priv *)&dev[1]; |
| 67 | } |
| 68 | |
| 69 | static inline |
| 70 | int hfi1_netdev_ctxt_count(struct hfi1_devdata *dd) |
| 71 | { |
| 72 | struct hfi1_netdev_priv *priv = hfi1_netdev_priv(dd->dummy_netdev); |
| 73 | |
| 74 | return priv->num_rx_q; |
| 75 | } |
| 76 | |
| 77 | static inline |
| 78 | struct hfi1_ctxtdata *hfi1_netdev_get_ctxt(struct hfi1_devdata *dd, int ctxt) |
| 79 | { |
| 80 | struct hfi1_netdev_priv *priv = hfi1_netdev_priv(dd->dummy_netdev); |
| 81 | |
| 82 | return priv->rxq[ctxt].rcd; |
| 83 | } |
| 84 | |
| 85 | static inline |
| 86 | int hfi1_netdev_get_free_rmt_idx(struct hfi1_devdata *dd) |
| 87 | { |
| 88 | struct hfi1_netdev_priv *priv = hfi1_netdev_priv(dd->dummy_netdev); |
| 89 | |
| 90 | return priv->rmt_start; |
| 91 | } |
| 92 | |
| 93 | static inline |
| 94 | void hfi1_netdev_set_free_rmt_idx(struct hfi1_devdata *dd, int rmt_idx) |
| 95 | { |
| 96 | struct hfi1_netdev_priv *priv = hfi1_netdev_priv(dd->dummy_netdev); |
| 97 | |
| 98 | priv->rmt_start = rmt_idx; |
| 99 | } |
| 100 | |
| 101 | u32 hfi1_num_netdev_contexts(struct hfi1_devdata *dd, u32 available_contexts, |
| 102 | struct cpumask *cpu_mask); |
| 103 | |
| 104 | void hfi1_netdev_enable_queues(struct hfi1_devdata *dd); |
| 105 | void hfi1_netdev_disable_queues(struct hfi1_devdata *dd); |
| 106 | int hfi1_netdev_rx_init(struct hfi1_devdata *dd); |
| 107 | int hfi1_netdev_rx_destroy(struct hfi1_devdata *dd); |
| 108 | int hfi1_netdev_alloc(struct hfi1_devdata *dd); |
| 109 | void hfi1_netdev_free(struct hfi1_devdata *dd); |
| 110 | int hfi1_netdev_add_data(struct hfi1_devdata *dd, int id, void *data); |
| 111 | void *hfi1_netdev_remove_data(struct hfi1_devdata *dd, int id); |
| 112 | void *hfi1_netdev_get_data(struct hfi1_devdata *dd, int id); |
| 113 | void *hfi1_netdev_get_first_data(struct hfi1_devdata *dd, int *start_id); |
| 114 | |
| 115 | /* chip.c */ |
| 116 | int hfi1_netdev_rx_napi(struct napi_struct *napi, int budget); |
| 117 | |
| 118 | #endif /* HFI1_NETDEV_H */ |