drivers/net/ethernet/sfc/siena_sriov.h

   1 /****************************************************************************
   2  * Driver for Solarflare network controllers and boards
   3  * Copyright 2015 Solarflare Communications Inc.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 as published
   7  * by the Free Software Foundation, incorporated herein by reference.
   8  */
   9
  10 #ifndef SIENA_SRIOV_H
  11 #define SIENA_SRIOV_H
  12
  13 #include "net_driver.h"
  14
  15 /* On the SFC9000 family each port is associated with 1 PCI physical
  16  * function (PF) handled by sfc and a configurable number of virtual
  17  * functions (VFs) that may be handled by some other driver, often in
  18  * a VM guest.  The queue pointer registers are mapped in both PF and
  19  * VF BARs such that an 8K region provides access to a single RX, TX
  20  * and event queue (collectively a Virtual Interface, VI or VNIC).
  21  *
  22  * The PF has access to all 1024 VIs while VFs are mapped to VIs
  23  * according to VI_BASE and VI_SCALE: VF i has access to VIs numbered
  24  * in range [VI_BASE + i << VI_SCALE, VI_BASE + i + 1 << VI_SCALE).
  25  * The number of VIs and the VI_SCALE value are configurable but must
  26  * be established at boot time by firmware.
  27  */
  28
  29 /* Maximum VI_SCALE parameter supported by Siena */
  30 #define EFX_VI_SCALE_MAX 6
  31 /* Base VI to use for SR-IOV. Must be aligned to (1 << EFX_VI_SCALE_MAX),
  32  * so this is the smallest allowed value.
  33  */
  34 #define EFX_VI_BASE 128U
  35 /* Maximum number of VFs allowed */
  36 #define EFX_VF_COUNT_MAX 127
  37 /* Limit EVQs on VFs to be only 8k to reduce buffer table reservation */
  38 #define EFX_MAX_VF_EVQ_SIZE 8192UL
  39 /* The number of buffer table entries reserved for each VI on a VF */
  40 #define EFX_VF_BUFTBL_PER_VI                                    \
  41         ((EFX_MAX_VF_EVQ_SIZE + 2 * EFX_MAX_DMAQ_SIZE) *        \
  42          sizeof(efx_qword_t) / EFX_BUF_SIZE)
  43
  44 int efx_siena_sriov_configure(struct efx_nic *efx, int num_vfs);
  45 int efx_siena_sriov_init(struct efx_nic *efx);
  46 void efx_siena_sriov_fini(struct efx_nic *efx);
  47 int efx_siena_sriov_mac_address_changed(struct efx_nic *efx);
  48 bool efx_siena_sriov_wanted(struct efx_nic *efx);
  49 void efx_siena_sriov_reset(struct efx_nic *efx);
  50 void efx_siena_sriov_flr(struct efx_nic *efx, unsigned flr);
  51
  52 int efx_siena_sriov_set_vf_mac(struct efx_nic *efx, int vf, u8 *mac);
  53 int efx_siena_sriov_set_vf_vlan(struct efx_nic *efx, int vf,
  54                                 u16 vlan, u8 qos);
  55 int efx_siena_sriov_set_vf_spoofchk(struct efx_nic *efx, int vf,
  56                                     bool spoofchk);
  57 int efx_siena_sriov_get_vf_config(struct efx_nic *efx, int vf,
  58                                   struct ifla_vf_info *ivf);
  59
  60 #ifdef CONFIG_SFC_SRIOV
  61
  62 static inline bool efx_siena_sriov_enabled(struct efx_nic *efx)
  63 {
  64         return efx->vf_init_count != 0;
  65 }
  66 #else /* !CONFIG_SFC_SRIOV */
  67 static inline bool efx_siena_sriov_enabled(struct efx_nic *efx)
  68 {
  69         return false;
  70 }
  71 #endif /* CONFIG_SFC_SRIOV */
  72
  73 void efx_siena_sriov_probe(struct efx_nic *efx);
  74 void efx_siena_sriov_tx_flush_done(struct efx_nic *efx, efx_qword_t *event);
  75 void efx_siena_sriov_rx_flush_done(struct efx_nic *efx, efx_qword_t *event);
  76 void efx_siena_sriov_event(struct efx_channel *channel, efx_qword_t *event);
  77 void efx_siena_sriov_desc_fetch_err(struct efx_nic *efx, unsigned dmaq);
  78
  79 #endif /* SIENA_SRIOV_H */