328 lines
8.1 KiB
C
328 lines
8.1 KiB
C
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// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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/* Copyright (C) 2015-2018 Netronome Systems, Inc. */
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/*
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* nfp_netvf_main.c
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* Netronome virtual function network device driver: Main entry point
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* Author: Jason McMullan <jason.mcmullan@netronome.com>
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* Rolf Neugebauer <rolf.neugebauer@netronome.com>
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/etherdevice.h>
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#include "nfp_net_ctrl.h"
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#include "nfp_net.h"
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#include "nfp_main.h"
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/**
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* struct nfp_net_vf - NFP VF-specific device structure
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* @nn: NFP Net structure for this device
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* @irq_entries: Pre-allocated array of MSI-X entries
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* @q_bar: Pointer to mapped QC memory (NULL if TX/RX mapped directly)
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* @ddir: Per-device debugfs directory
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*/
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struct nfp_net_vf {
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struct nfp_net *nn;
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struct msix_entry irq_entries[NFP_NET_NON_Q_VECTORS +
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NFP_NET_MAX_TX_RINGS];
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u8 __iomem *q_bar;
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struct dentry *ddir;
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};
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static const char nfp_net_driver_name[] = "nfp_netvf";
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#define PCI_DEVICE_NFP6000VF 0x6003
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static const struct pci_device_id nfp_netvf_pci_device_ids[] = {
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{ PCI_VENDOR_ID_NETRONOME, PCI_DEVICE_NFP6000VF,
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PCI_VENDOR_ID_NETRONOME, PCI_ANY_ID,
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PCI_ANY_ID, 0,
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},
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{ 0, } /* Required last entry. */
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};
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MODULE_DEVICE_TABLE(pci, nfp_netvf_pci_device_ids);
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static void nfp_netvf_get_mac_addr(struct nfp_net *nn)
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{
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u8 mac_addr[ETH_ALEN];
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put_unaligned_be32(nn_readl(nn, NFP_NET_CFG_MACADDR + 0), &mac_addr[0]);
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put_unaligned_be16(nn_readw(nn, NFP_NET_CFG_MACADDR + 6), &mac_addr[4]);
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if (!is_valid_ether_addr(mac_addr)) {
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eth_hw_addr_random(nn->dp.netdev);
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return;
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}
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ether_addr_copy(nn->dp.netdev->dev_addr, mac_addr);
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ether_addr_copy(nn->dp.netdev->perm_addr, mac_addr);
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}
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static int nfp_netvf_pci_probe(struct pci_dev *pdev,
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const struct pci_device_id *pci_id)
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{
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struct nfp_net_fw_version fw_ver;
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int max_tx_rings, max_rx_rings;
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u32 tx_bar_off, rx_bar_off;
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u32 tx_bar_sz, rx_bar_sz;
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int tx_bar_no, rx_bar_no;
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struct nfp_net_vf *vf;
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unsigned int num_irqs;
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u8 __iomem *ctrl_bar;
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struct nfp_net *nn;
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u32 startq;
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int stride;
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int err;
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vf = kzalloc(sizeof(*vf), GFP_KERNEL);
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if (!vf)
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return -ENOMEM;
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pci_set_drvdata(pdev, vf);
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err = pci_enable_device_mem(pdev);
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if (err)
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goto err_free_vf;
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err = pci_request_regions(pdev, nfp_net_driver_name);
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if (err) {
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dev_err(&pdev->dev, "Unable to allocate device memory.\n");
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goto err_pci_disable;
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}
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pci_set_master(pdev);
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err = dma_set_mask_and_coherent(&pdev->dev,
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DMA_BIT_MASK(NFP_NET_MAX_DMA_BITS));
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if (err)
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goto err_pci_regions;
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/* Map the Control BAR.
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*
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* Irrespective of the advertised BAR size we only map the
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* first NFP_NET_CFG_BAR_SZ of the BAR. This keeps the code
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* the identical for PF and VF drivers.
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*/
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ctrl_bar = ioremap_nocache(pci_resource_start(pdev, NFP_NET_CTRL_BAR),
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NFP_NET_CFG_BAR_SZ);
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if (!ctrl_bar) {
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dev_err(&pdev->dev,
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"Failed to map resource %d\n", NFP_NET_CTRL_BAR);
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err = -EIO;
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goto err_pci_regions;
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}
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nfp_net_get_fw_version(&fw_ver, ctrl_bar);
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if (fw_ver.resv || fw_ver.class != NFP_NET_CFG_VERSION_CLASS_GENERIC) {
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dev_err(&pdev->dev, "Unknown Firmware ABI %d.%d.%d.%d\n",
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fw_ver.resv, fw_ver.class, fw_ver.major, fw_ver.minor);
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err = -EINVAL;
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goto err_ctrl_unmap;
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}
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/* Determine stride */
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if (nfp_net_fw_ver_eq(&fw_ver, 0, 0, 0, 1)) {
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stride = 2;
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tx_bar_no = NFP_NET_Q0_BAR;
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rx_bar_no = NFP_NET_Q1_BAR;
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dev_warn(&pdev->dev, "OBSOLETE Firmware detected - VF isolation not available\n");
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} else {
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switch (fw_ver.major) {
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case 1 ... 5:
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stride = 4;
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tx_bar_no = NFP_NET_Q0_BAR;
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rx_bar_no = tx_bar_no;
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break;
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default:
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dev_err(&pdev->dev, "Unsupported Firmware ABI %d.%d.%d.%d\n",
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fw_ver.resv, fw_ver.class,
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fw_ver.major, fw_ver.minor);
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err = -EINVAL;
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goto err_ctrl_unmap;
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}
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}
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/* Find out how many rings are supported */
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max_tx_rings = readl(ctrl_bar + NFP_NET_CFG_MAX_TXRINGS);
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max_rx_rings = readl(ctrl_bar + NFP_NET_CFG_MAX_RXRINGS);
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tx_bar_sz = NFP_QCP_QUEUE_ADDR_SZ * max_tx_rings * stride;
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rx_bar_sz = NFP_QCP_QUEUE_ADDR_SZ * max_rx_rings * stride;
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/* Sanity checks */
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if (tx_bar_sz > pci_resource_len(pdev, tx_bar_no)) {
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dev_err(&pdev->dev,
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"TX BAR too small for number of TX rings. Adjusting\n");
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tx_bar_sz = pci_resource_len(pdev, tx_bar_no);
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max_tx_rings = (tx_bar_sz / NFP_QCP_QUEUE_ADDR_SZ) / 2;
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}
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if (rx_bar_sz > pci_resource_len(pdev, rx_bar_no)) {
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dev_err(&pdev->dev,
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"RX BAR too small for number of RX rings. Adjusting\n");
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rx_bar_sz = pci_resource_len(pdev, rx_bar_no);
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max_rx_rings = (rx_bar_sz / NFP_QCP_QUEUE_ADDR_SZ) / 2;
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}
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startq = readl(ctrl_bar + NFP_NET_CFG_START_TXQ);
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tx_bar_off = NFP_PCIE_QUEUE(startq);
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startq = readl(ctrl_bar + NFP_NET_CFG_START_RXQ);
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rx_bar_off = NFP_PCIE_QUEUE(startq);
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/* Allocate and initialise the netdev */
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nn = nfp_net_alloc(pdev, ctrl_bar, true, max_tx_rings, max_rx_rings);
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if (IS_ERR(nn)) {
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err = PTR_ERR(nn);
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goto err_ctrl_unmap;
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}
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vf->nn = nn;
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nn->fw_ver = fw_ver;
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nn->dp.is_vf = 1;
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nn->stride_tx = stride;
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nn->stride_rx = stride;
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if (rx_bar_no == tx_bar_no) {
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u32 bar_off, bar_sz;
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resource_size_t map_addr;
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/* Make a single overlapping BAR mapping */
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if (tx_bar_off < rx_bar_off)
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bar_off = tx_bar_off;
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else
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bar_off = rx_bar_off;
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if ((tx_bar_off + tx_bar_sz) > (rx_bar_off + rx_bar_sz))
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bar_sz = (tx_bar_off + tx_bar_sz) - bar_off;
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else
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bar_sz = (rx_bar_off + rx_bar_sz) - bar_off;
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map_addr = pci_resource_start(pdev, tx_bar_no) + bar_off;
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vf->q_bar = ioremap_nocache(map_addr, bar_sz);
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if (!vf->q_bar) {
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nn_err(nn, "Failed to map resource %d\n", tx_bar_no);
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err = -EIO;
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goto err_netdev_free;
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}
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/* TX queues */
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nn->tx_bar = vf->q_bar + (tx_bar_off - bar_off);
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/* RX queues */
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nn->rx_bar = vf->q_bar + (rx_bar_off - bar_off);
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} else {
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resource_size_t map_addr;
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/* TX queues */
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map_addr = pci_resource_start(pdev, tx_bar_no) + tx_bar_off;
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nn->tx_bar = ioremap_nocache(map_addr, tx_bar_sz);
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if (!nn->tx_bar) {
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nn_err(nn, "Failed to map resource %d\n", tx_bar_no);
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err = -EIO;
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goto err_netdev_free;
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}
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/* RX queues */
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map_addr = pci_resource_start(pdev, rx_bar_no) + rx_bar_off;
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nn->rx_bar = ioremap_nocache(map_addr, rx_bar_sz);
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if (!nn->rx_bar) {
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nn_err(nn, "Failed to map resource %d\n", rx_bar_no);
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err = -EIO;
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goto err_unmap_tx;
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}
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}
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nfp_netvf_get_mac_addr(nn);
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num_irqs = nfp_net_irqs_alloc(pdev, vf->irq_entries,
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NFP_NET_MIN_VNIC_IRQS,
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NFP_NET_NON_Q_VECTORS +
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nn->dp.num_r_vecs);
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if (!num_irqs) {
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nn_warn(nn, "Unable to allocate MSI-X Vectors. Exiting\n");
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err = -EIO;
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goto err_unmap_rx;
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}
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nfp_net_irqs_assign(nn, vf->irq_entries, num_irqs);
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err = nfp_net_init(nn);
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if (err)
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goto err_irqs_disable;
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nfp_net_info(nn);
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vf->ddir = nfp_net_debugfs_device_add(pdev);
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nfp_net_debugfs_vnic_add(nn, vf->ddir);
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return 0;
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err_irqs_disable:
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nfp_net_irqs_disable(pdev);
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err_unmap_rx:
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if (!vf->q_bar)
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iounmap(nn->rx_bar);
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err_unmap_tx:
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if (!vf->q_bar)
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iounmap(nn->tx_bar);
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else
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iounmap(vf->q_bar);
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err_netdev_free:
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nfp_net_free(nn);
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err_ctrl_unmap:
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iounmap(ctrl_bar);
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err_pci_regions:
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pci_release_regions(pdev);
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err_pci_disable:
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pci_disable_device(pdev);
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err_free_vf:
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pci_set_drvdata(pdev, NULL);
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kfree(vf);
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return err;
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}
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static void nfp_netvf_pci_remove(struct pci_dev *pdev)
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{
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struct nfp_net_vf *vf;
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struct nfp_net *nn;
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vf = pci_get_drvdata(pdev);
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if (!vf)
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return;
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nn = vf->nn;
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/* Note, the order is slightly different from above as we need
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* to keep the nn pointer around till we have freed everything.
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*/
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nfp_net_debugfs_dir_clean(&nn->debugfs_dir);
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nfp_net_debugfs_dir_clean(&vf->ddir);
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nfp_net_clean(nn);
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nfp_net_irqs_disable(pdev);
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if (!vf->q_bar) {
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iounmap(nn->rx_bar);
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iounmap(nn->tx_bar);
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} else {
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iounmap(vf->q_bar);
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}
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iounmap(nn->dp.ctrl_bar);
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nfp_net_free(nn);
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pci_release_regions(pdev);
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pci_disable_device(pdev);
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pci_set_drvdata(pdev, NULL);
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kfree(vf);
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}
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struct pci_driver nfp_netvf_pci_driver = {
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.name = nfp_net_driver_name,
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.id_table = nfp_netvf_pci_device_ids,
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.probe = nfp_netvf_pci_probe,
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.remove = nfp_netvf_pci_remove,
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.shutdown = nfp_netvf_pci_remove,
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};
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