diff options
| -rw-r--r-- | drivers/net/ethernet/netronome/nfp/nfp_main.c | 25 | ||||
| -rw-r--r-- | drivers/net/ethernet/netronome/nfp/nfp_main.h | 2 |
2 files changed, 27 insertions, 0 deletions
diff --git a/drivers/net/ethernet/netronome/nfp/nfp_main.c b/drivers/net/ethernet/netronome/nfp/nfp_main.c index 8cda6b0e7e32..dedac720fb29 100644 --- a/drivers/net/ethernet/netronome/nfp/nfp_main.c +++ b/drivers/net/ethernet/netronome/nfp/nfp_main.c @@ -47,6 +47,7 @@ #include "nfpcore/nfp.h" #include "nfpcore/nfp_cpp.h" +#include "nfpcore/nfp_nffw.h" #include "nfpcore/nfp_nsp_eth.h" #include "nfpcore/nfp6000_pcie.h" @@ -70,12 +71,34 @@ static const struct pci_device_id nfp_pci_device_ids[] = { }; MODULE_DEVICE_TABLE(pci, nfp_pci_device_ids); +static void nfp_pcie_sriov_read_nfd_limit(struct nfp_pf *pf) +{ +#ifdef CONFIG_PCI_IOV + int err; + + pf->limit_vfs = nfp_rtsym_read_le(pf->cpp, "nfd_vf_cfg_max_vfs", &err); + if (!err) + return; + + pf->limit_vfs = ~0; + /* Allow any setting for backwards compatibility if symbol not found */ + if (err != -ENOENT) + nfp_warn(pf->cpp, "Warning: VF limit read failed: %d\n", err); +#endif +} + static int nfp_pcie_sriov_enable(struct pci_dev *pdev, int num_vfs) { #ifdef CONFIG_PCI_IOV struct nfp_pf *pf = pci_get_drvdata(pdev); int err; + if (num_vfs > pf->limit_vfs) { + nfp_info(pf->cpp, "Firmware limits number of VFs to %u\n", + pf->limit_vfs); + return -EINVAL; + } + err = pci_enable_sriov(pdev, num_vfs); if (err) { dev_warn(&pdev->dev, "Failed to enable PCI sriov: %d\n", err); @@ -333,6 +356,8 @@ static int nfp_pci_probe(struct pci_dev *pdev, if (err) goto err_cpp_free; + nfp_pcie_sriov_read_nfd_limit(pf); + err = nfp_net_pci_probe(pf); if (err) goto err_fw_unload; diff --git a/drivers/net/ethernet/netronome/nfp/nfp_main.h b/drivers/net/ethernet/netronome/nfp/nfp_main.h index 6c40fa322da3..39105d0435e9 100644 --- a/drivers/net/ethernet/netronome/nfp/nfp_main.h +++ b/drivers/net/ethernet/netronome/nfp/nfp_main.h @@ -59,6 +59,7 @@ struct nfp_eth_table; * @tx_area: Pointer to the CPP area for the TX queues * @rx_area: Pointer to the CPP area for the FL/RX queues * @irq_entries: Array of MSI-X entries for all ports + * @limit_vfs: Number of VFs supported by firmware (~0 for PCI limit) * @num_vfs: Number of SR-IOV VFs enabled * @fw_loaded: Is the firmware loaded? * @eth_tbl: NSP ETH table @@ -77,6 +78,7 @@ struct nfp_pf { struct msix_entry *irq_entries; + unsigned int limit_vfs; unsigned int num_vfs; bool fw_loaded; |