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If any VF is assigned as the PF is unloaded, do not attempt to remove its vport or the vswitch. These will be removed if the driver binds to the PF again, as an entity reset occurs during probe. A 'force' flag is added to efx_ef10_pci_sriov_disable() to distinguish between disabling SR-IOV and driver unload. SR-IOV cannot be disabled if VFs are assigned to guests. If the PF driver is unloaded while VFs are assigned, the driver may try to bind to the VF again at a later point if the driver has been reloaded and the VF returns to the same domain as the PF. In this case, the PF will not have a VF data structure, so the VF can check this and drop out of probe early. In this case, efx->vf_count will be zero but VFs will be present. The user is advised to remove the VF and re-create it. The check at the beginning of efx_ef10_pci_sriov_disable() that efx->vf_count is non-zero is removed to allow SR-IOV to be disabled in this case. Also, if the PF driver is unloaded, it will disable SR-IOV to remove these unknown VFs. By not disabling bus-mastering if VFs are still assigned, the VF will continue to pass traffic after the PF has been removed. When using the max_vfs module parameter, if VFs are already present do not try to initialise any more. Signed-off-by: Shradha Shah <sshah@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
69 lines
2.3 KiB
C
69 lines
2.3 KiB
C
/****************************************************************************
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* Driver for Solarflare network controllers and boards
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* Copyright 2015 Solarflare Communications Inc.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published
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* by the Free Software Foundation, incorporated herein by reference.
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*/
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#ifndef EF10_SRIOV_H
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#define EF10_SRIOV_H
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#include "net_driver.h"
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/**
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* struct ef10_vf - PF's store of VF data
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* @efx: efx_nic struct for the current VF
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* @pci_dev: the pci_dev struct for the VF, retained while the VF is assigned
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* @vport_id: vport ID for the VF
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* @vport_assigned: record whether the vport is currently assigned to the VF
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* @mac: MAC address for the VF, zero when address is removed from the vport
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* @vlan: Default VLAN for the VF or #EFX_EF10_NO_VLAN
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*/
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struct ef10_vf {
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struct efx_nic *efx;
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struct pci_dev *pci_dev;
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unsigned int vport_id;
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unsigned int vport_assigned;
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u8 mac[ETH_ALEN];
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u16 vlan;
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#define EFX_EF10_NO_VLAN 0
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};
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static inline bool efx_ef10_sriov_wanted(struct efx_nic *efx)
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{
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return false;
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}
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int efx_ef10_sriov_configure(struct efx_nic *efx, int num_vfs);
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int efx_ef10_sriov_init(struct efx_nic *efx);
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static inline void efx_ef10_sriov_reset(struct efx_nic *efx) {}
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void efx_ef10_sriov_fini(struct efx_nic *efx);
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static inline void efx_ef10_sriov_flr(struct efx_nic *efx, unsigned vf_i) {}
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int efx_ef10_sriov_set_vf_mac(struct efx_nic *efx, int vf, u8 *mac);
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int efx_ef10_sriov_set_vf_vlan(struct efx_nic *efx, int vf_i,
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u16 vlan, u8 qos);
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int efx_ef10_sriov_set_vf_spoofchk(struct efx_nic *efx, int vf,
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bool spoofchk);
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int efx_ef10_sriov_get_vf_config(struct efx_nic *efx, int vf_i,
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struct ifla_vf_info *ivf);
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int efx_ef10_sriov_set_vf_link_state(struct efx_nic *efx, int vf_i,
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int link_state);
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int efx_ef10_sriov_get_phys_port_id(struct efx_nic *efx,
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struct netdev_phys_item_id *ppid);
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int efx_ef10_vswitching_probe_pf(struct efx_nic *efx);
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int efx_ef10_vswitching_probe_vf(struct efx_nic *efx);
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int efx_ef10_vswitching_restore_pf(struct efx_nic *efx);
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int efx_ef10_vswitching_restore_vf(struct efx_nic *efx);
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void efx_ef10_vswitching_remove_pf(struct efx_nic *efx);
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void efx_ef10_vswitching_remove_vf(struct efx_nic *efx);
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#endif /* EF10_SRIOV_H */
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