// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
/* Copyright (C) 2015-2018 Netronome Systems, Inc. */
/*
* nfp_netvf_main.c
* Netronome virtual function network device driver: Main entry point
* Author: Jason McMullan <[email protected]>
* Rolf Neugebauer <[email protected]>
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/etherdevice.h>
#include "nfpcore/nfp_dev.h"
#include "nfp_net_ctrl.h"
#include "nfp_net.h"
#include "nfp_main.h"
/**
* struct nfp_net_vf - NFP VF-specific device structure
* @nn: NFP Net structure for this device
* @irq_entries: Pre-allocated array of MSI-X entries
* @q_bar: Pointer to mapped QC memory (NULL if TX/RX mapped directly)
* @ddir: Per-device debugfs directory
*/
struct nfp_net_vf {
struct nfp_net *nn;
struct msix_entry irq_entries[NFP_NET_NON_Q_VECTORS +
NFP_NET_MAX_TX_RINGS];
u8 __iomem *q_bar;
struct dentry *ddir;
};
static const char nfp_net_driver_name[] = "nfp_netvf";
static const struct pci_device_id nfp_netvf_pci_device_ids[] = {
{ PCI_VENDOR_ID_NETRONOME, PCI_DEVICE_ID_NFP3800_VF,
PCI_VENDOR_ID_NETRONOME, PCI_ANY_ID,
PCI_ANY_ID, 0, NFP_DEV_NFP3800_VF,
},
{ PCI_VENDOR_ID_NETRONOME, PCI_DEVICE_ID_NFP6000_VF,
PCI_VENDOR_ID_NETRONOME, PCI_ANY_ID,
PCI_ANY_ID, 0, NFP_DEV_NFP6000_VF,
},
{ PCI_VENDOR_ID_CORIGINE, PCI_DEVICE_ID_NFP3800_VF,
PCI_VENDOR_ID_CORIGINE, PCI_ANY_ID,
PCI_ANY_ID, 0, NFP_DEV_NFP3800_VF,
},
{ PCI_VENDOR_ID_CORIGINE, PCI_DEVICE_ID_NFP6000_VF,
PCI_VENDOR_ID_CORIGINE, PCI_ANY_ID,
PCI_ANY_ID, 0, NFP_DEV_NFP6000_VF,
},
{ 0, } /* Required last entry. */
};
MODULE_DEVICE_TABLE(pci, nfp_netvf_pci_device_ids);
static void nfp_netvf_get_mac_addr(struct nfp_net *nn)
{
u8 mac_addr[ETH_ALEN];
put_unaligned_be32(nn_readl(nn, NFP_NET_CFG_MACADDR + 0), &mac_addr[0]);
put_unaligned_be16(nn_readw(nn, NFP_NET_CFG_MACADDR + 6), &mac_addr[4]);
if (!is_valid_ether_addr(mac_addr)) {
eth_hw_addr_random(nn->dp.netdev);
return;
}
eth_hw_addr_set(nn->dp.netdev, mac_addr);
ether_addr_copy(nn->dp.netdev->perm_addr, mac_addr);
}
static int nfp_netvf_pci_probe(struct pci_dev *pdev,
const struct pci_device_id *pci_id)
{
const struct nfp_dev_info *dev_info;
struct nfp_net_fw_version fw_ver;
int max_tx_rings, max_rx_rings;
u32 tx_bar_off, rx_bar_off;
u32 tx_bar_sz, rx_bar_sz;
int tx_bar_no, rx_bar_no;
struct nfp_net_vf *vf;
unsigned int num_irqs;
u8 __iomem *ctrl_bar;
struct nfp_net *nn;
u32 startq;
int stride;
int err;
dev_info = &nfp_dev_info[pci_id->driver_data];
vf = kzalloc(sizeof(*vf), GFP_KERNEL);
if (!vf)
return -ENOMEM;
pci_set_drvdata(pdev, vf);
err = pci_enable_device_mem(pdev);
if (err)
goto err_free_vf;
err = pci_request_regions(pdev, nfp_net_driver_name);
if (err) {
dev_err(&pdev->dev, "Unable to allocate device memory.\n");
goto err_pci_disable;
}
pci_set_master(pdev);
err = dma_set_mask_and_coherent(&pdev->dev, dev_info->dma_mask);
if (err)
goto err_pci_regions;
/* Map the Control BAR.
*
* Irrespective of the advertised BAR size we only map the
* first NFP_NET_CFG_BAR_SZ of the BAR. This keeps the code
* the identical for PF and VF drivers.
*/
ctrl_bar = ioremap(pci_resource_start(pdev, NFP_NET_CTRL_BAR),
NFP_NET_CFG_BAR_SZ);
if (!ctrl_bar) {
dev_err(&pdev->dev,
"Failed to map resource %d\n", NFP_NET_CTRL_BAR);
err = -EIO;
goto err_pci_regions;
}
nfp_net_get_fw_version(&fw_ver, ctrl_bar);
if (fw_ver.extend & NFP_NET_CFG_VERSION_RESERVED_MASK ||
fw_ver.class != NFP_NET_CFG_VERSION_CLASS_GENERIC) {
dev_err(&pdev->dev, "Unknown Firmware ABI %d.%d.%d.%d\n",
fw_ver.extend, fw_ver.class,
fw_ver.major, fw_ver.minor);
err = -EINVAL;
goto err_ctrl_unmap;
}
/* Determine stride */
if (nfp_net_fw_ver_eq(&fw_ver, 0, 0, 0, 1)) {
stride = 2;
tx_bar_no = NFP_NET_Q0_BAR;
rx_bar_no = NFP_NET_Q1_BAR;
dev_warn(&pdev->dev, "OBSOLETE Firmware detected - VF isolation not available\n");
} else {
switch (fw_ver.major) {
case 1 ... 5:
stride = 4;
tx_bar_no = NFP_NET_Q0_BAR;
rx_bar_no = tx_bar_no;
break;
default:
dev_err(&pdev->dev, "Unsupported Firmware ABI %d.%d.%d.%d\n",
fw_ver.extend, fw_ver.class,
fw_ver.major, fw_ver.minor);
err = -EINVAL;
goto err_ctrl_unmap;
}
}
/* Find out how many rings are supported */
max_tx_rings = readl(ctrl_bar + NFP_NET_CFG_MAX_TXRINGS);
max_rx_rings = readl(ctrl_bar + NFP_NET_CFG_MAX_RXRINGS);
tx_bar_sz = NFP_QCP_QUEUE_ADDR_SZ * max_tx_rings * stride;
rx_bar_sz = NFP_QCP_QUEUE_ADDR_SZ * max_rx_rings * stride;
/* Sanity checks */
if (tx_bar_sz > pci_resource_len(pdev, tx_bar_no)) {
dev_err(&pdev->dev,
"TX BAR too small for number of TX rings. Adjusting\n");
tx_bar_sz = pci_resource_len(pdev, tx_bar_no);
max_tx_rings = (tx_bar_sz / NFP_QCP_QUEUE_ADDR_SZ) / 2;
}
if (rx_bar_sz > pci_resource_len(pdev, rx_bar_no)) {
dev_err(&pdev->dev,
"RX BAR too small for number of RX rings. Adjusting\n");
rx_bar_sz = pci_resource_len(pdev, rx_bar_no);
max_rx_rings = (rx_bar_sz / NFP_QCP_QUEUE_ADDR_SZ) / 2;
}
startq = readl(ctrl_bar + NFP_NET_CFG_START_TXQ);
tx_bar_off = nfp_qcp_queue_offset(dev_info, startq);
startq = readl(ctrl_bar + NFP_NET_CFG_START_RXQ);
rx_bar_off = nfp_qcp_queue_offset(dev_info, startq);
/* Allocate and initialise the netdev */
nn = nfp_net_alloc(pdev, dev_info, ctrl_bar, true,
max_tx_rings, max_rx_rings);
if (IS_ERR(nn)) {
err = PTR_ERR(nn);
goto err_ctrl_unmap;
}
vf->nn = nn;
nn->dp.is_vf = 1;
nn->stride_tx = stride;
nn->stride_rx = stride;
if (rx_bar_no == tx_bar_no) {
u32 bar_off, bar_sz;
resource_size_t map_addr;
/* Make a single overlapping BAR mapping */
if (tx_bar_off < rx_bar_off)
bar_off = tx_bar_off;
else
bar_off = rx_bar_off;
if ((tx_bar_off + tx_bar_sz) > (rx_bar_off + rx_bar_sz))
bar_sz = (tx_bar_off + tx_bar_sz) - bar_off;
else
bar_sz = (rx_bar_off + rx_bar_sz) - bar_off;
map_addr = pci_resource_start(pdev, tx_bar_no) + bar_off;
vf->q_bar = ioremap(map_addr, bar_sz);
if (!vf->q_bar) {
nn_err(nn, "Failed to map resource %d\n", tx_bar_no);
err = -EIO;
goto err_netdev_free;
}
/* TX queues */
nn->tx_bar = vf->q_bar + (tx_bar_off - bar_off);
/* RX queues */
nn->rx_bar = vf->q_bar + (rx_bar_off - bar_off);
} else {
resource_size_t map_addr;
/* TX queues */
map_addr = pci_resource_start(pdev, tx_bar_no) + tx_bar_off;
nn->tx_bar = ioremap(map_addr, tx_bar_sz);
if (!nn->tx_bar) {
nn_err(nn, "Failed to map resource %d\n", tx_bar_no);
err = -EIO;
goto err_netdev_free;
}
/* RX queues */
map_addr = pci_resource_start(pdev, rx_bar_no) + rx_bar_off;
nn->rx_bar = ioremap(map_addr, rx_bar_sz);
if (!nn->rx_bar) {
nn_err(nn, "Failed to map resource %d\n", rx_bar_no);
err = -EIO;
goto err_unmap_tx;
}
}
nfp_netvf_get_mac_addr(nn);
num_irqs = nfp_net_irqs_alloc(pdev, vf->irq_entries,
NFP_NET_MIN_VNIC_IRQS,
NFP_NET_NON_Q_VECTORS +
nn->dp.num_r_vecs);
if (!num_irqs) {
nn_warn(nn, "Unable to allocate MSI-X Vectors. Exiting\n");
err = -EIO;
goto err_unmap_rx;
}
nfp_net_irqs_assign(nn, vf->irq_entries, num_irqs);
err = nfp_net_init(nn);
if (err)
goto err_irqs_disable;
nfp_net_info(nn);
vf->ddir = nfp_net_debugfs_device_add(pdev);
nfp_net_debugfs_vnic_add(nn, vf->ddir);
return 0;
err_irqs_disable:
nfp_net_irqs_disable(pdev);
err_unmap_rx:
if (!vf->q_bar)
iounmap(nn->rx_bar);
err_unmap_tx:
if (!vf->q_bar)
iounmap(nn->tx_bar);
else
iounmap(vf->q_bar);
err_netdev_free:
nfp_net_free(nn);
err_ctrl_unmap:
iounmap(ctrl_bar);
err_pci_regions:
pci_release_regions(pdev);
err_pci_disable:
pci_disable_device(pdev);
err_free_vf:
pci_set_drvdata(pdev, NULL);
kfree(vf);
return err;
}
static void nfp_netvf_pci_remove(struct pci_dev *pdev)
{
struct nfp_net_vf *vf;
struct nfp_net *nn;
vf = pci_get_drvdata(pdev);
if (!vf)
return;
nn = vf->nn;
/* Note, the order is slightly different from above as we need
* to keep the nn pointer around till we have freed everything.
*/
nfp_net_debugfs_dir_clean(&nn->debugfs_dir);
nfp_net_debugfs_dir_clean(&vf->ddir);
nfp_net_clean(nn);
nfp_net_irqs_disable(pdev);
if (!vf->q_bar) {
iounmap(nn->rx_bar);
iounmap(nn->tx_bar);
} else {
iounmap(vf->q_bar);
}
iounmap(nn->dp.ctrl_bar);
nfp_net_free(nn);
pci_release_regions(pdev);
pci_disable_device(pdev);
pci_set_drvdata(pdev, NULL);
kfree(vf);
}
struct pci_driver nfp_netvf_pci_driver = {
.name = nfp_net_driver_name,
.id_table = nfp_netvf_pci_device_ids,
.probe = nfp_netvf_pci_probe,
.remove = nfp_netvf_pci_remove,
.shutdown = nfp_netvf_pci_remove,
};
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