cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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netdev.h (2981B)

      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 * Both IPoIB and VNIC netdevices will be working on the rx abstraction.
     18 * @napi: napi object
     19 * @rx: ptr to netdev_rx
     20 * @rcd:  ptr to receive context data
     21 */
     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 to
     30 * max queues supported by VNIC (HFI1_VNIC_MAX_QUEUE).
     31 */
     32#define HFI1_MAX_NETDEV_CTXTS   8
     33
     34/* Number of NETDEV RSM entries */
     35#define NUM_NETDEV_MAP_ENTRIES HFI1_MAX_NETDEV_CTXTS
     36
     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 contexts
     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 */
     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 inline
     65int hfi1_netdev_ctxt_count(struct hfi1_devdata *dd)
     66{
     67	return dd->netdev_rx->num_rx_q;
     68}
     69
     70static inline
     71struct hfi1_ctxtdata *hfi1_netdev_get_ctxt(struct hfi1_devdata *dd, int ctxt)
     72{
     73	return dd->netdev_rx->rxq[ctxt].rcd;
     74}
     75
     76static inline
     77int hfi1_netdev_get_free_rmt_idx(struct hfi1_devdata *dd)
     78{
     79	return dd->netdev_rx->rmt_start;
     80}
     81
     82static inline
     83void 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 */