| /**************************************************************************** |
| * Driver for Solarflare network controllers and boards |
| * Copyright 2015 Solarflare Communications Inc. |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 as published |
| * by the Free Software Foundation, incorporated herein by reference. |
| */ |
| #include <linux/pci.h> |
| #include <linux/module.h> |
| #include "net_driver.h" |
| #include "ef10_sriov.h" |
| #include "efx.h" |
| #include "nic.h" |
| #include "mcdi_pcol.h" |
| |
| static int efx_ef10_pci_sriov_enable(struct efx_nic *efx, int num_vfs) |
| { |
| int rc = 0; |
| struct pci_dev *dev = efx->pci_dev; |
| |
| efx->vf_count = num_vfs; |
| rc = pci_enable_sriov(dev, num_vfs); |
| if (rc) { |
| efx->vf_count = 0; |
| netif_err(efx, probe, efx->net_dev, |
| "Failed to enable SRIOV VFs\n"); |
| } |
| return rc; |
| } |
| |
| static int efx_ef10_pci_sriov_disable(struct efx_nic *efx) |
| { |
| struct pci_dev *dev = efx->pci_dev; |
| |
| efx->vf_count = 0; |
| pci_disable_sriov(dev); |
| return 0; |
| } |
| |
| int efx_ef10_sriov_configure(struct efx_nic *efx, int num_vfs) |
| { |
| if (num_vfs == 0) |
| return efx_ef10_pci_sriov_disable(efx); |
| else |
| return efx_ef10_pci_sriov_enable(efx, num_vfs); |
| } |
| |
| int efx_ef10_sriov_init(struct efx_nic *efx) |
| { |
| return 0; |
| } |
| |
| void efx_ef10_sriov_fini(struct efx_nic *efx) |
| { |
| int rc; |
| |
| rc = efx_ef10_pci_sriov_disable(efx); |
| if (rc) |
| netif_dbg(efx, drv, efx->net_dev, |
| "Disabling SRIOV was not successful rc=%d\n", rc); |
| else |
| netif_dbg(efx, drv, efx->net_dev, "SRIOV disabled\n"); |
| } |
| |
| static int efx_ef10_vswitch_alloc(struct efx_nic *efx, unsigned int port_id, |
| unsigned int vswitch_type) |
| { |
| MCDI_DECLARE_BUF(inbuf, MC_CMD_VSWITCH_ALLOC_IN_LEN); |
| |
| MCDI_SET_DWORD(inbuf, VSWITCH_ALLOC_IN_UPSTREAM_PORT_ID, port_id); |
| MCDI_SET_DWORD(inbuf, VSWITCH_ALLOC_IN_TYPE, vswitch_type); |
| MCDI_SET_DWORD(inbuf, VSWITCH_ALLOC_IN_NUM_VLAN_TAGS, 0); |
| MCDI_POPULATE_DWORD_1(inbuf, VSWITCH_ALLOC_IN_FLAGS, |
| VSWITCH_ALLOC_IN_FLAG_AUTO_PORT, 0); |
| |
| return efx_mcdi_rpc(efx, MC_CMD_VSWITCH_ALLOC, inbuf, sizeof(inbuf), |
| NULL, 0, NULL); |
| } |
| |
| static int efx_ef10_vswitch_free(struct efx_nic *efx, unsigned int port_id) |
| { |
| MCDI_DECLARE_BUF(inbuf, MC_CMD_VSWITCH_FREE_IN_LEN); |
| |
| MCDI_SET_DWORD(inbuf, VSWITCH_FREE_IN_UPSTREAM_PORT_ID, port_id); |
| |
| return efx_mcdi_rpc(efx, MC_CMD_VSWITCH_FREE, inbuf, sizeof(inbuf), |
| NULL, 0, NULL); |
| } |
| |
| static int efx_ef10_vport_alloc(struct efx_nic *efx, |
| unsigned int port_id_in, |
| unsigned int vport_type, |
| unsigned int *port_id_out) |
| { |
| MCDI_DECLARE_BUF(inbuf, MC_CMD_VPORT_ALLOC_IN_LEN); |
| MCDI_DECLARE_BUF(outbuf, MC_CMD_VPORT_ALLOC_OUT_LEN); |
| size_t outlen; |
| int rc; |
| |
| EFX_WARN_ON_PARANOID(!port_id_out); |
| |
| MCDI_SET_DWORD(inbuf, VPORT_ALLOC_IN_UPSTREAM_PORT_ID, port_id_in); |
| MCDI_SET_DWORD(inbuf, VPORT_ALLOC_IN_TYPE, vport_type); |
| MCDI_SET_DWORD(inbuf, VPORT_ALLOC_IN_NUM_VLAN_TAGS, 0); |
| MCDI_POPULATE_DWORD_1(inbuf, VPORT_ALLOC_IN_FLAGS, |
| VPORT_ALLOC_IN_FLAG_AUTO_PORT, 0); |
| |
| rc = efx_mcdi_rpc(efx, MC_CMD_VPORT_ALLOC, inbuf, sizeof(inbuf), |
| outbuf, sizeof(outbuf), &outlen); |
| if (rc) |
| return rc; |
| if (outlen < MC_CMD_VPORT_ALLOC_OUT_LEN) |
| return -EIO; |
| |
| *port_id_out = MCDI_DWORD(outbuf, VPORT_ALLOC_OUT_VPORT_ID); |
| return 0; |
| } |
| |
| static int efx_ef10_vport_free(struct efx_nic *efx, unsigned int port_id) |
| { |
| MCDI_DECLARE_BUF(inbuf, MC_CMD_VPORT_FREE_IN_LEN); |
| |
| MCDI_SET_DWORD(inbuf, VPORT_FREE_IN_VPORT_ID, port_id); |
| |
| return efx_mcdi_rpc(efx, MC_CMD_VPORT_FREE, inbuf, sizeof(inbuf), |
| NULL, 0, NULL); |
| } |
| |
| /* On top of the default firmware vswitch setup, create a VEB vswitch and |
| * expansion vport for use by this function. |
| */ |
| int efx_ef10_vswitching_probe(struct efx_nic *efx) |
| { |
| struct efx_ef10_nic_data *nic_data = efx->nic_data; |
| int rc; |
| |
| if (pci_sriov_get_totalvfs(efx->pci_dev) <= 0) |
| return 0; /* vswitch not needed as we have no VFs */ |
| |
| rc = efx_ef10_vswitch_alloc(efx, EVB_PORT_ID_ASSIGNED, |
| MC_CMD_VSWITCH_ALLOC_IN_VSWITCH_TYPE_VEB); |
| if (rc) |
| goto fail1; |
| |
| rc = efx_ef10_vport_alloc(efx, EVB_PORT_ID_ASSIGNED, |
| MC_CMD_VPORT_ALLOC_IN_VPORT_TYPE_NORMAL, |
| &nic_data->vport_id); |
| if (rc) |
| goto fail2; |
| |
| return 0; |
| fail2: |
| efx_ef10_vswitch_free(efx, EVB_PORT_ID_ASSIGNED); |
| fail1: |
| return rc; |
| } |
| |
| int efx_ef10_vswitching_restore(struct efx_nic *efx) |
| { |
| struct efx_ef10_nic_data *nic_data = efx->nic_data; |
| int rc; |
| |
| if (!nic_data->must_probe_vswitching) |
| return 0; |
| |
| rc = efx_ef10_vswitching_probe(efx); |
| |
| if (!rc) |
| nic_data->must_probe_vswitching = false; |
| return rc; |
| } |
| |
| void efx_ef10_vswitching_remove(struct efx_nic *efx) |
| { |
| struct efx_ef10_nic_data *nic_data = efx->nic_data; |
| |
| if (nic_data->vport_id == EVB_PORT_ID_ASSIGNED) |
| return; /* No vswitch was ever created */ |
| |
| efx_ef10_vport_free(efx, nic_data->vport_id); |
| nic_data->vport_id = EVB_PORT_ID_ASSIGNED; |
| |
| efx_ef10_vswitch_free(efx, nic_data->vport_id); |
| } |