diff options
Diffstat (limited to 'drivers/infiniband/hw/hfi1/netdev.h')
| -rw-r--r-- | drivers/infiniband/hw/hfi1/netdev.h | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/hfi1/netdev.h b/drivers/infiniband/hw/hfi1/netdev.h new file mode 100644 index 000000000..8aa074670 --- /dev/null +++ b/drivers/infiniband/hw/hfi1/netdev.h @@ -0,0 +1,105 @@ +/* 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 */ |