LXR linux/drivers/net/ethernet/sfc/siena

   1/* SPDX-License-Identifier: GPL-2.0-only */
   2/****************************************************************************
   3 * Driver for Solarflare network controllers and boards
   4 * Copyright 2015 Solarflare Communications Inc.
   5 */
   6
   7#ifndef SIENA_SRIOV_H
   8#define SIENA_SRIOV_H
   9
  10#include "net_driver.h"
  11
  12/* On the SFC9000 family each port is associated with 1 PCI physical
  13 * function (PF) handled by sfc and a configurable number of virtual
  14 * functions (VFs) that may be handled by some other driver, often in
  15 * a VM guest.  The queue pointer registers are mapped in both PF and
  16 * VF BARs such that an 8K region provides access to a single RX, TX
  17 * and event queue (collectively a Virtual Interface, VI or VNIC).
  18 *
  19 * The PF has access to all 1024 VIs while VFs are mapped to VIs
  20 * according to VI_BASE and VI_SCALE: VF i has access to VIs numbered
  21 * in range [VI_BASE + i << VI_SCALE, VI_BASE + i + 1 << VI_SCALE).
  22 * The number of VIs and the VI_SCALE value are configurable but must
  23 * be established at boot time by firmware.
  24 */
  25
  26/* Maximum VI_SCALE parameter supported by Siena */
  27#define EFX_VI_SCALE_MAX 6
  28/* Base VI to use for SR-IOV. Must be aligned to (1 << EFX_VI_SCALE_MAX),
  29 * so this is the smallest allowed value.
  30 */
  31#define EFX_VI_BASE 128U
  32/* Maximum number of VFs allowed */
  33#define EFX_VF_COUNT_MAX 127
  34/* Limit EVQs on VFs to be only 8k to reduce buffer table reservation */
  35#define EFX_MAX_VF_EVQ_SIZE 8192UL
  36/* The number of buffer table entries reserved for each VI on a VF */
  37#define EFX_VF_BUFTBL_PER_VI                                    \
  38        ((EFX_MAX_VF_EVQ_SIZE + 2 * EFX_MAX_DMAQ_SIZE) *        \
  39         sizeof(efx_qword_t) / EFX_BUF_SIZE)
  40
  41int efx_siena_sriov_configure(struct efx_nic *efx, int num_vfs);
  42int efx_siena_sriov_init(struct efx_nic *efx);
  43void efx_siena_sriov_fini(struct efx_nic *efx);
  44int efx_siena_sriov_mac_address_changed(struct efx_nic *efx);
  45bool efx_siena_sriov_wanted(struct efx_nic *efx);
  46void efx_siena_sriov_reset(struct efx_nic *efx);
  47void efx_siena_sriov_flr(struct efx_nic *efx, unsigned flr);
  48
  49int efx_siena_sriov_set_vf_mac(struct efx_nic *efx, int vf, u8 *mac);
  50int efx_siena_sriov_set_vf_vlan(struct efx_nic *efx, int vf,
  51                                u16 vlan, u8 qos);
  52int efx_siena_sriov_set_vf_spoofchk(struct efx_nic *efx, int vf,
  53                                    bool spoofchk);
  54int efx_siena_sriov_get_vf_config(struct efx_nic *efx, int vf,
  55                                  struct ifla_vf_info *ivf);
  56
  57#ifdef CONFIG_SFC_SRIOV
  58
  59static inline bool efx_siena_sriov_enabled(struct efx_nic *efx)
  60{
  61        return efx->vf_init_count != 0;
  62}
  63#else /* !CONFIG_SFC_SRIOV */
  64static inline bool efx_siena_sriov_enabled(struct efx_nic *efx)
  65{
  66        return false;
  67}
  68#endif /* CONFIG_SFC_SRIOV */
  69
  70void efx_siena_sriov_probe(struct efx_nic *efx);
  71void efx_siena_sriov_tx_flush_done(struct efx_nic *efx, efx_qword_t *event);
  72void efx_siena_sriov_rx_flush_done(struct efx_nic *efx, efx_qword_t *event);
  73void efx_siena_sriov_event(struct efx_channel *channel, efx_qword_t *event);
  74void efx_siena_sriov_desc_fetch_err(struct efx_nic *efx, unsigned dmaq);
  75
  76#endif /* SIENA_SRIOV_H */
  77