blob: d3e4cfd244e270c9a924717b83f7af5e340cada4 [file] [log] [blame]
// SPDX-License-Identifier: GPL-2.0
/* Marvell OcteonTx2 RVU Virtual Function ethernet driver */
#include <linux/etherdevice.h>
#include <linux/module.h>
#include <linux/pci.h>
#include "otx2_common.h"
#include "otx2_reg.h"
#define DRV_NAME "octeontx2-nicvf"
#define DRV_STRING "Marvell OcteonTX2 NIC Virtual Function Driver"
static const struct pci_device_id otx2_vf_id_table[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_CAVIUM, PCI_DEVID_OCTEONTX2_RVU_AFVF) },
{ PCI_DEVICE(PCI_VENDOR_ID_CAVIUM, PCI_DEVID_OCTEONTX2_RVU_VF) },
{ }
};
MODULE_AUTHOR("Sunil Goutham <sgoutham@marvell.com>");
MODULE_DESCRIPTION(DRV_STRING);
MODULE_LICENSE("GPL v2");
MODULE_DEVICE_TABLE(pci, otx2_vf_id_table);
/* RVU VF Interrupt Vector Enumeration */
enum {
RVU_VF_INT_VEC_MBOX = 0x0,
};
static void otx2vf_process_vfaf_mbox_msg(struct otx2_nic *vf,
struct mbox_msghdr *msg)
{
if (msg->id >= MBOX_MSG_MAX) {
dev_err(vf->dev,
"Mbox msg with unknown ID %d\n", msg->id);
return;
}
if (msg->sig != OTX2_MBOX_RSP_SIG) {
dev_err(vf->dev,
"Mbox msg with wrong signature %x, ID %d\n",
msg->sig, msg->id);
return;
}
if (msg->rc == MBOX_MSG_INVALID) {
dev_err(vf->dev,
"PF/AF says the sent msg(s) %d were invalid\n",
msg->id);
return;
}
switch (msg->id) {
case MBOX_MSG_READY:
vf->pcifunc = msg->pcifunc;
break;
case MBOX_MSG_MSIX_OFFSET:
mbox_handler_msix_offset(vf, (struct msix_offset_rsp *)msg);
break;
case MBOX_MSG_NPA_LF_ALLOC:
mbox_handler_npa_lf_alloc(vf, (struct npa_lf_alloc_rsp *)msg);
break;
case MBOX_MSG_NIX_LF_ALLOC:
mbox_handler_nix_lf_alloc(vf, (struct nix_lf_alloc_rsp *)msg);
break;
case MBOX_MSG_NIX_TXSCH_ALLOC:
mbox_handler_nix_txsch_alloc(vf,
(struct nix_txsch_alloc_rsp *)msg);
break;
case MBOX_MSG_NIX_BP_ENABLE:
mbox_handler_nix_bp_enable(vf, (struct nix_bp_cfg_rsp *)msg);
break;
default:
if (msg->rc)
dev_err(vf->dev,
"Mbox msg response has err %d, ID %d\n",
msg->rc, msg->id);
}
}
static void otx2vf_vfaf_mbox_handler(struct work_struct *work)
{
struct otx2_mbox_dev *mdev;
struct mbox_hdr *rsp_hdr;
struct mbox_msghdr *msg;
struct otx2_mbox *mbox;
struct mbox *af_mbox;
int offset, id;
af_mbox = container_of(work, struct mbox, mbox_wrk);
mbox = &af_mbox->mbox;
mdev = &mbox->dev[0];
rsp_hdr = (struct mbox_hdr *)(mdev->mbase + mbox->rx_start);
if (af_mbox->num_msgs == 0)
return;
offset = mbox->rx_start + ALIGN(sizeof(*rsp_hdr), MBOX_MSG_ALIGN);
for (id = 0; id < af_mbox->num_msgs; id++) {
msg = (struct mbox_msghdr *)(mdev->mbase + offset);
otx2vf_process_vfaf_mbox_msg(af_mbox->pfvf, msg);
offset = mbox->rx_start + msg->next_msgoff;
if (mdev->msgs_acked == (af_mbox->num_msgs - 1))
__otx2_mbox_reset(mbox, 0);
mdev->msgs_acked++;
}
}
static int otx2vf_process_mbox_msg_up(struct otx2_nic *vf,
struct mbox_msghdr *req)
{
struct msg_rsp *rsp;
int err;
/* Check if valid, if not reply with a invalid msg */
if (req->sig != OTX2_MBOX_REQ_SIG) {
otx2_reply_invalid_msg(&vf->mbox.mbox_up, 0, 0, req->id);
return -ENODEV;
}
switch (req->id) {
case MBOX_MSG_CGX_LINK_EVENT:
rsp = (struct msg_rsp *)otx2_mbox_alloc_msg(
&vf->mbox.mbox_up, 0,
sizeof(struct msg_rsp));
if (!rsp)
return -ENOMEM;
rsp->hdr.id = MBOX_MSG_CGX_LINK_EVENT;
rsp->hdr.sig = OTX2_MBOX_RSP_SIG;
rsp->hdr.pcifunc = 0;
rsp->hdr.rc = 0;
err = otx2_mbox_up_handler_cgx_link_event(
vf, (struct cgx_link_info_msg *)req, rsp);
return err;
default:
otx2_reply_invalid_msg(&vf->mbox.mbox_up, 0, 0, req->id);
return -ENODEV;
}
return 0;
}
static void otx2vf_vfaf_mbox_up_handler(struct work_struct *work)
{
struct otx2_mbox_dev *mdev;
struct mbox_hdr *rsp_hdr;
struct mbox_msghdr *msg;
struct otx2_mbox *mbox;
struct mbox *vf_mbox;
struct otx2_nic *vf;
int offset, id;
vf_mbox = container_of(work, struct mbox, mbox_up_wrk);
vf = vf_mbox->pfvf;
mbox = &vf_mbox->mbox_up;
mdev = &mbox->dev[0];
rsp_hdr = (struct mbox_hdr *)(mdev->mbase + mbox->rx_start);
if (vf_mbox->up_num_msgs == 0)
return;
offset = mbox->rx_start + ALIGN(sizeof(*rsp_hdr), MBOX_MSG_ALIGN);
for (id = 0; id < vf_mbox->up_num_msgs; id++) {
msg = (struct mbox_msghdr *)(mdev->mbase + offset);
otx2vf_process_mbox_msg_up(vf, msg);
offset = mbox->rx_start + msg->next_msgoff;
}
otx2_mbox_msg_send(mbox, 0);
}
static irqreturn_t otx2vf_vfaf_mbox_intr_handler(int irq, void *vf_irq)
{
struct otx2_nic *vf = (struct otx2_nic *)vf_irq;
struct otx2_mbox_dev *mdev;
struct otx2_mbox *mbox;
struct mbox_hdr *hdr;
/* Clear the IRQ */
otx2_write64(vf, RVU_VF_INT, BIT_ULL(0));
/* Read latest mbox data */
smp_rmb();
/* Check for PF => VF response messages */
mbox = &vf->mbox.mbox;
mdev = &mbox->dev[0];
otx2_sync_mbox_bbuf(mbox, 0);
trace_otx2_msg_interrupt(mbox->pdev, "PF to VF", BIT_ULL(0));
hdr = (struct mbox_hdr *)(mdev->mbase + mbox->rx_start);
if (hdr->num_msgs) {
vf->mbox.num_msgs = hdr->num_msgs;
hdr->num_msgs = 0;
memset(mbox->hwbase + mbox->rx_start, 0,
ALIGN(sizeof(struct mbox_hdr), sizeof(u64)));
queue_work(vf->mbox_wq, &vf->mbox.mbox_wrk);
}
/* Check for PF => VF notification messages */
mbox = &vf->mbox.mbox_up;
mdev = &mbox->dev[0];
otx2_sync_mbox_bbuf(mbox, 0);
hdr = (struct mbox_hdr *)(mdev->mbase + mbox->rx_start);
if (hdr->num_msgs) {
vf->mbox.up_num_msgs = hdr->num_msgs;
hdr->num_msgs = 0;
memset(mbox->hwbase + mbox->rx_start, 0,
ALIGN(sizeof(struct mbox_hdr), sizeof(u64)));
queue_work(vf->mbox_wq, &vf->mbox.mbox_up_wrk);
}
return IRQ_HANDLED;
}
static void otx2vf_disable_mbox_intr(struct otx2_nic *vf)
{
int vector = pci_irq_vector(vf->pdev, RVU_VF_INT_VEC_MBOX);
/* Disable VF => PF mailbox IRQ */
otx2_write64(vf, RVU_VF_INT_ENA_W1C, BIT_ULL(0));
free_irq(vector, vf);
}
static int otx2vf_register_mbox_intr(struct otx2_nic *vf, bool probe_pf)
{
struct otx2_hw *hw = &vf->hw;
struct msg_req *req;
char *irq_name;
int err;
/* Register mailbox interrupt handler */
irq_name = &hw->irq_name[RVU_VF_INT_VEC_MBOX * NAME_SIZE];
snprintf(irq_name, NAME_SIZE, "RVUVFAF Mbox");
err = request_irq(pci_irq_vector(vf->pdev, RVU_VF_INT_VEC_MBOX),
otx2vf_vfaf_mbox_intr_handler, 0, irq_name, vf);
if (err) {
dev_err(vf->dev,
"RVUPF: IRQ registration failed for VFAF mbox irq\n");
return err;
}
/* Enable mailbox interrupt for msgs coming from PF.
* First clear to avoid spurious interrupts, if any.
*/
otx2_write64(vf, RVU_VF_INT, BIT_ULL(0));
otx2_write64(vf, RVU_VF_INT_ENA_W1S, BIT_ULL(0));
if (!probe_pf)
return 0;
/* Check mailbox communication with PF */
req = otx2_mbox_alloc_msg_ready(&vf->mbox);
if (!req) {
otx2vf_disable_mbox_intr(vf);
return -ENOMEM;
}
err = otx2_sync_mbox_msg(&vf->mbox);
if (err) {
dev_warn(vf->dev,
"AF not responding to mailbox, deferring probe\n");
otx2vf_disable_mbox_intr(vf);
return -EPROBE_DEFER;
}
return 0;
}
static void otx2vf_vfaf_mbox_destroy(struct otx2_nic *vf)
{
struct mbox *mbox = &vf->mbox;
if (vf->mbox_wq) {
flush_workqueue(vf->mbox_wq);
destroy_workqueue(vf->mbox_wq);
vf->mbox_wq = NULL;
}
if (mbox->mbox.hwbase)
iounmap((void __iomem *)mbox->mbox.hwbase);
otx2_mbox_destroy(&mbox->mbox);
otx2_mbox_destroy(&mbox->mbox_up);
}
static int otx2vf_vfaf_mbox_init(struct otx2_nic *vf)
{
struct mbox *mbox = &vf->mbox;
void __iomem *hwbase;
int err;
mbox->pfvf = vf;
vf->mbox_wq = alloc_workqueue("otx2_vfaf_mailbox",
WQ_UNBOUND | WQ_HIGHPRI |
WQ_MEM_RECLAIM, 1);
if (!vf->mbox_wq)
return -ENOMEM;
/* Mailbox is a reserved memory (in RAM) region shared between
* admin function (i.e PF0) and this VF, shouldn't be mapped as
* device memory to allow unaligned accesses.
*/
hwbase = ioremap_wc(pci_resource_start(vf->pdev, PCI_MBOX_BAR_NUM),
pci_resource_len(vf->pdev, PCI_MBOX_BAR_NUM));
if (!hwbase) {
dev_err(vf->dev, "Unable to map VFAF mailbox region\n");
err = -ENOMEM;
goto exit;
}
err = otx2_mbox_init(&mbox->mbox, hwbase, vf->pdev, vf->reg_base,
MBOX_DIR_VFPF, 1);
if (err)
goto exit;
err = otx2_mbox_init(&mbox->mbox_up, hwbase, vf->pdev, vf->reg_base,
MBOX_DIR_VFPF_UP, 1);
if (err)
goto exit;
err = otx2_mbox_bbuf_init(mbox, vf->pdev);
if (err)
goto exit;
INIT_WORK(&mbox->mbox_wrk, otx2vf_vfaf_mbox_handler);
INIT_WORK(&mbox->mbox_up_wrk, otx2vf_vfaf_mbox_up_handler);
mutex_init(&mbox->lock);
return 0;
exit:
destroy_workqueue(vf->mbox_wq);
return err;
}
static int otx2vf_open(struct net_device *netdev)
{
struct otx2_nic *vf;
int err;
err = otx2_open(netdev);
if (err)
return err;
/* LBKs do not receive link events so tell everyone we are up here */
vf = netdev_priv(netdev);
if (is_otx2_lbkvf(vf->pdev)) {
pr_info("%s NIC Link is UP\n", netdev->name);
netif_carrier_on(netdev);
netif_tx_start_all_queues(netdev);
}
return 0;
}
static int otx2vf_stop(struct net_device *netdev)
{
return otx2_stop(netdev);
}
static netdev_tx_t otx2vf_xmit(struct sk_buff *skb, struct net_device *netdev)
{
struct otx2_nic *vf = netdev_priv(netdev);
int qidx = skb_get_queue_mapping(skb);
struct otx2_snd_queue *sq;
struct netdev_queue *txq;
sq = &vf->qset.sq[qidx];
txq = netdev_get_tx_queue(netdev, qidx);
if (!otx2_sq_append_skb(netdev, sq, skb, qidx)) {
netif_tx_stop_queue(txq);
/* Check again, incase SQBs got freed up */
smp_mb();
if (((sq->num_sqbs - *sq->aura_fc_addr) * sq->sqe_per_sqb)
> sq->sqe_thresh)
netif_tx_wake_queue(txq);
return NETDEV_TX_BUSY;
}
return NETDEV_TX_OK;
}
static int otx2vf_change_mtu(struct net_device *netdev, int new_mtu)
{
bool if_up = netif_running(netdev);
int err = 0;
if (if_up)
otx2vf_stop(netdev);
netdev_info(netdev, "Changing MTU from %d to %d\n",
netdev->mtu, new_mtu);
netdev->mtu = new_mtu;
if (if_up)
err = otx2vf_open(netdev);
return err;
}
static void otx2vf_reset_task(struct work_struct *work)
{
struct otx2_nic *vf = container_of(work, struct otx2_nic, reset_task);
rtnl_lock();
if (netif_running(vf->netdev)) {
otx2vf_stop(vf->netdev);
vf->reset_count++;
otx2vf_open(vf->netdev);
}
rtnl_unlock();
}
static const struct net_device_ops otx2vf_netdev_ops = {
.ndo_open = otx2vf_open,
.ndo_stop = otx2vf_stop,
.ndo_start_xmit = otx2vf_xmit,
.ndo_set_mac_address = otx2_set_mac_address,
.ndo_change_mtu = otx2vf_change_mtu,
.ndo_get_stats64 = otx2_get_stats64,
.ndo_tx_timeout = otx2_tx_timeout,
};
static int otx2vf_realloc_msix_vectors(struct otx2_nic *vf)
{
struct otx2_hw *hw = &vf->hw;
int num_vec, err;
num_vec = hw->nix_msixoff;
num_vec += NIX_LF_CINT_VEC_START + hw->max_queues;
otx2vf_disable_mbox_intr(vf);
pci_free_irq_vectors(hw->pdev);
err = pci_alloc_irq_vectors(hw->pdev, num_vec, num_vec, PCI_IRQ_MSIX);
if (err < 0) {
dev_err(vf->dev, "%s: Failed to realloc %d IRQ vectors\n",
__func__, num_vec);
return err;
}
return otx2vf_register_mbox_intr(vf, false);
}
static int otx2vf_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
int num_vec = pci_msix_vec_count(pdev);
struct device *dev = &pdev->dev;
struct net_device *netdev;
struct otx2_nic *vf;
struct otx2_hw *hw;
int err, qcount;
err = pcim_enable_device(pdev);
if (err) {
dev_err(dev, "Failed to enable PCI device\n");
return err;
}
err = pci_request_regions(pdev, DRV_NAME);
if (err) {
dev_err(dev, "PCI request regions failed 0x%x\n", err);
return err;
}
err = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(48));
if (err) {
dev_err(dev, "DMA mask config failed, abort\n");
goto err_release_regions;
}
pci_set_master(pdev);
qcount = num_online_cpus();
netdev = alloc_etherdev_mqs(sizeof(*vf), qcount, qcount);
if (!netdev) {
err = -ENOMEM;
goto err_release_regions;
}
pci_set_drvdata(pdev, netdev);
SET_NETDEV_DEV(netdev, &pdev->dev);
vf = netdev_priv(netdev);
vf->netdev = netdev;
vf->pdev = pdev;
vf->dev = dev;
vf->iommu_domain = iommu_get_domain_for_dev(dev);
vf->flags |= OTX2_FLAG_INTF_DOWN;
hw = &vf->hw;
hw->pdev = vf->pdev;
hw->rx_queues = qcount;
hw->tx_queues = qcount;
hw->max_queues = qcount;
hw->irq_name = devm_kmalloc_array(&hw->pdev->dev, num_vec, NAME_SIZE,
GFP_KERNEL);
if (!hw->irq_name) {
err = -ENOMEM;
goto err_free_netdev;
}
hw->affinity_mask = devm_kcalloc(&hw->pdev->dev, num_vec,
sizeof(cpumask_var_t), GFP_KERNEL);
if (!hw->affinity_mask) {
err = -ENOMEM;
goto err_free_netdev;
}
err = pci_alloc_irq_vectors(hw->pdev, num_vec, num_vec, PCI_IRQ_MSIX);
if (err < 0) {
dev_err(dev, "%s: Failed to alloc %d IRQ vectors\n",
__func__, num_vec);
goto err_free_netdev;
}
vf->reg_base = pcim_iomap(pdev, PCI_CFG_REG_BAR_NUM, 0);
if (!vf->reg_base) {
dev_err(dev, "Unable to map physical function CSRs, aborting\n");
err = -ENOMEM;
goto err_free_irq_vectors;
}
/* Init VF <=> PF mailbox stuff */
err = otx2vf_vfaf_mbox_init(vf);
if (err)
goto err_free_irq_vectors;
/* Register mailbox interrupt */
err = otx2vf_register_mbox_intr(vf, true);
if (err)
goto err_mbox_destroy;
/* Request AF to attach NPA and LIX LFs to this AF */
err = otx2_attach_npa_nix(vf);
if (err)
goto err_disable_mbox_intr;
err = otx2vf_realloc_msix_vectors(vf);
if (err)
goto err_mbox_destroy;
err = otx2_set_real_num_queues(netdev, qcount, qcount);
if (err)
goto err_detach_rsrc;
otx2_setup_dev_hw_settings(vf);
/* Assign default mac address */
otx2_get_mac_from_af(netdev);
netdev->hw_features = NETIF_F_RXCSUM | NETIF_F_IP_CSUM |
NETIF_F_IPV6_CSUM | NETIF_F_RXHASH |
NETIF_F_SG | NETIF_F_TSO | NETIF_F_TSO6 |
NETIF_F_GSO_UDP_L4;
netdev->features = netdev->hw_features;
/* Support TSO on tag interface */
netdev->vlan_features |= netdev->features;
netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_TX |
NETIF_F_HW_VLAN_STAG_TX;
netdev->features |= netdev->hw_features;
netdev->gso_max_segs = OTX2_MAX_GSO_SEGS;
netdev->watchdog_timeo = OTX2_TX_TIMEOUT;
netdev->netdev_ops = &otx2vf_netdev_ops;
/* MTU range: 68 - 9190 */
netdev->min_mtu = OTX2_MIN_MTU;
netdev->max_mtu = OTX2_MAX_MTU;
INIT_WORK(&vf->reset_task, otx2vf_reset_task);
/* To distinguish, for LBK VFs set netdev name explicitly */
if (is_otx2_lbkvf(vf->pdev)) {
int n;
n = (vf->pcifunc >> RVU_PFVF_FUNC_SHIFT) & RVU_PFVF_FUNC_MASK;
/* Need to subtract 1 to get proper VF number */
n -= 1;
snprintf(netdev->name, sizeof(netdev->name), "lbk%d", n);
}
err = register_netdev(netdev);
if (err) {
dev_err(dev, "Failed to register netdevice\n");
goto err_detach_rsrc;
}
otx2vf_set_ethtool_ops(netdev);
/* Enable pause frames by default */
vf->flags |= OTX2_FLAG_RX_PAUSE_ENABLED;
vf->flags |= OTX2_FLAG_TX_PAUSE_ENABLED;
return 0;
err_detach_rsrc:
otx2_detach_resources(&vf->mbox);
err_disable_mbox_intr:
otx2vf_disable_mbox_intr(vf);
err_mbox_destroy:
otx2vf_vfaf_mbox_destroy(vf);
err_free_irq_vectors:
pci_free_irq_vectors(hw->pdev);
err_free_netdev:
pci_set_drvdata(pdev, NULL);
free_netdev(netdev);
err_release_regions:
pci_release_regions(pdev);
return err;
}
static void otx2vf_remove(struct pci_dev *pdev)
{
struct net_device *netdev = pci_get_drvdata(pdev);
struct otx2_nic *vf;
if (!netdev)
return;
vf = netdev_priv(netdev);
cancel_work_sync(&vf->reset_task);
unregister_netdev(netdev);
otx2vf_disable_mbox_intr(vf);
otx2_detach_resources(&vf->mbox);
otx2vf_vfaf_mbox_destroy(vf);
pci_free_irq_vectors(vf->pdev);
pci_set_drvdata(pdev, NULL);
free_netdev(netdev);
pci_release_regions(pdev);
}
static struct pci_driver otx2vf_driver = {
.name = DRV_NAME,
.id_table = otx2_vf_id_table,
.probe = otx2vf_probe,
.remove = otx2vf_remove,
.shutdown = otx2vf_remove,
};
static int __init otx2vf_init_module(void)
{
pr_info("%s: %s\n", DRV_NAME, DRV_STRING);
return pci_register_driver(&otx2vf_driver);
}
static void __exit otx2vf_cleanup_module(void)
{
pci_unregister_driver(&otx2vf_driver);
}
module_init(otx2vf_init_module);
module_exit(otx2vf_cleanup_module);