drivers/net/ethernet/sfc/siena_sriov.h

   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
  41 int efx_siena_sriov_configure(struct efx_nic *efx, int num_vfs);
  42 int efx_siena_sriov_init(struct efx_nic *efx);
  43 void efx_siena_sriov_fini(struct efx_nic *efx);
  44 int efx_siena_sriov_mac_address_changed(struct efx_nic *efx);
  45 bool efx_siena_sriov_wanted(struct efx_nic *efx);
  46 void efx_siena_sriov_reset(struct efx_nic *efx);
  47 void efx_siena_sriov_flr(struct efx_nic *efx, unsigned flr);
  48
  49 int efx_siena_sriov_set_vf_mac(struct efx_nic *efx, int vf, u8 *mac);
  50 int efx_siena_sriov_set_vf_vlan(struct efx_nic *efx, int vf,
  51                                 u16 vlan, u8 qos);
  52 int efx_siena_sriov_set_vf_spoofchk(struct efx_nic *efx, int vf,
  53                                     bool spoofchk);
  54 int 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
  59 static inline bool efx_siena_sriov_enabled(struct efx_nic *efx)
  60 {
  61         return efx->vf_init_count != 0;
  62 }
  63 #else /* !CONFIG_SFC_SRIOV */
  64 static inline bool efx_siena_sriov_enabled(struct efx_nic *efx)
  65 {
  66         return false;
  67 }
  68 #endif /* CONFIG_SFC_SRIOV */
  69
  70 void efx_siena_sriov_probe(struct efx_nic *efx);
  71 void efx_siena_sriov_tx_flush_done(struct efx_nic *efx, efx_qword_t *event);
  72 void efx_siena_sriov_rx_flush_done(struct efx_nic *efx, efx_qword_t *event);
  73 void efx_siena_sriov_event(struct efx_channel *channel, efx_qword_t *event);
  74 void efx_siena_sriov_desc_fetch_err(struct efx_nic *efx, unsigned dmaq);
  75
  76 #endif /* SIENA_SRIOV_H */