blob: f3f2e71431acb641a8bea4c6eb105be32e729a21 [file] [log] [blame]
/**********************************************************************
* Author: Cavium, Inc.
*
* Contact: support@cavium.com
* Please include "LiquidIO" in the subject.
*
* Copyright (c) 2003-2017 Cavium, Inc.
*
* This file 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.
*
* This file is distributed in the hope that it will be useful, but
* AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
* NONINFRINGEMENT. See the GNU General Public License for more details.
***********************************************************************/
#include <linux/pci.h>
#include <linux/if_vlan.h>
#include "liquidio_common.h"
#include "octeon_droq.h"
#include "octeon_iq.h"
#include "response_manager.h"
#include "octeon_device.h"
#include "octeon_nic.h"
#include "octeon_main.h"
#include "octeon_network.h"
#include "lio_vf_rep.h"
static int lio_vf_rep_open(struct net_device *ndev);
static int lio_vf_rep_stop(struct net_device *ndev);
static netdev_tx_t lio_vf_rep_pkt_xmit(struct sk_buff *skb,
struct net_device *ndev);
static void lio_vf_rep_tx_timeout(struct net_device *netdev);
static int lio_vf_rep_phys_port_name(struct net_device *dev,
char *buf, size_t len);
static void lio_vf_rep_get_stats64(struct net_device *dev,
struct rtnl_link_stats64 *stats64);
static int lio_vf_rep_change_mtu(struct net_device *ndev, int new_mtu);
static int lio_vf_get_port_parent_id(struct net_device *dev,
struct netdev_phys_item_id *ppid);
static const struct net_device_ops lio_vf_rep_ndev_ops = {
.ndo_open = lio_vf_rep_open,
.ndo_stop = lio_vf_rep_stop,
.ndo_start_xmit = lio_vf_rep_pkt_xmit,
.ndo_tx_timeout = lio_vf_rep_tx_timeout,
.ndo_get_phys_port_name = lio_vf_rep_phys_port_name,
.ndo_get_stats64 = lio_vf_rep_get_stats64,
.ndo_change_mtu = lio_vf_rep_change_mtu,
.ndo_get_port_parent_id = lio_vf_get_port_parent_id,
};
static int
lio_vf_rep_send_soft_command(struct octeon_device *oct,
void *req, int req_size,
void *resp, int resp_size)
{
int tot_resp_size = sizeof(struct lio_vf_rep_resp) + resp_size;
struct octeon_soft_command *sc = NULL;
struct lio_vf_rep_resp *rep_resp;
void *sc_req;
int err;
sc = (struct octeon_soft_command *)
octeon_alloc_soft_command(oct, req_size,
tot_resp_size, 0);
if (!sc)
return -ENOMEM;
init_completion(&sc->complete);
sc->sc_status = OCTEON_REQUEST_PENDING;
sc_req = (struct lio_vf_rep_req *)sc->virtdptr;
memcpy(sc_req, req, req_size);
rep_resp = (struct lio_vf_rep_resp *)sc->virtrptr;
memset(rep_resp, 0, tot_resp_size);
WRITE_ONCE(rep_resp->status, 1);
sc->iq_no = 0;
octeon_prepare_soft_command(oct, sc, OPCODE_NIC,
OPCODE_NIC_VF_REP_CMD, 0, 0, 0);
err = octeon_send_soft_command(oct, sc);
if (err == IQ_SEND_FAILED)
goto free_buff;
err = wait_for_sc_completion_timeout(oct, sc, 0);
if (err)
return err;
err = READ_ONCE(rep_resp->status) ? -EBUSY : 0;
if (err)
dev_err(&oct->pci_dev->dev, "VF rep send config failed\n");
else if (resp)
memcpy(resp, (rep_resp + 1), resp_size);
WRITE_ONCE(sc->caller_is_done, true);
return err;
free_buff:
octeon_free_soft_command(oct, sc);
return err;
}
static int
lio_vf_rep_open(struct net_device *ndev)
{
struct lio_vf_rep_desc *vf_rep = netdev_priv(ndev);
struct lio_vf_rep_req rep_cfg;
struct octeon_device *oct;
int ret;
oct = vf_rep->oct;
memset(&rep_cfg, 0, sizeof(rep_cfg));
rep_cfg.req_type = LIO_VF_REP_REQ_STATE;
rep_cfg.ifidx = vf_rep->ifidx;
rep_cfg.rep_state.state = LIO_VF_REP_STATE_UP;
ret = lio_vf_rep_send_soft_command(oct, &rep_cfg,
sizeof(rep_cfg), NULL, 0);
if (ret) {
dev_err(&oct->pci_dev->dev,
"VF_REP open failed with err %d\n", ret);
return -EIO;
}
atomic_set(&vf_rep->ifstate, (atomic_read(&vf_rep->ifstate) |
LIO_IFSTATE_RUNNING));
netif_carrier_on(ndev);
netif_start_queue(ndev);
return 0;
}
static int
lio_vf_rep_stop(struct net_device *ndev)
{
struct lio_vf_rep_desc *vf_rep = netdev_priv(ndev);
struct lio_vf_rep_req rep_cfg;
struct octeon_device *oct;
int ret;
oct = vf_rep->oct;
memset(&rep_cfg, 0, sizeof(rep_cfg));
rep_cfg.req_type = LIO_VF_REP_REQ_STATE;
rep_cfg.ifidx = vf_rep->ifidx;
rep_cfg.rep_state.state = LIO_VF_REP_STATE_DOWN;
ret = lio_vf_rep_send_soft_command(oct, &rep_cfg,
sizeof(rep_cfg), NULL, 0);
if (ret) {
dev_err(&oct->pci_dev->dev,
"VF_REP dev stop failed with err %d\n", ret);
return -EIO;
}
atomic_set(&vf_rep->ifstate, (atomic_read(&vf_rep->ifstate) &
~LIO_IFSTATE_RUNNING));
netif_tx_disable(ndev);
netif_carrier_off(ndev);
return 0;
}
static void
lio_vf_rep_tx_timeout(struct net_device *ndev)
{
netif_trans_update(ndev);
netif_wake_queue(ndev);
}
static void
lio_vf_rep_get_stats64(struct net_device *dev,
struct rtnl_link_stats64 *stats64)
{
struct lio_vf_rep_desc *vf_rep = netdev_priv(dev);
/* Swap tx and rx stats as VF rep is a switch port */
stats64->tx_packets = vf_rep->stats.rx_packets;
stats64->tx_bytes = vf_rep->stats.rx_bytes;
stats64->tx_dropped = vf_rep->stats.rx_dropped;
stats64->rx_packets = vf_rep->stats.tx_packets;
stats64->rx_bytes = vf_rep->stats.tx_bytes;
stats64->rx_dropped = vf_rep->stats.tx_dropped;
}
static int
lio_vf_rep_change_mtu(struct net_device *ndev, int new_mtu)
{
struct lio_vf_rep_desc *vf_rep = netdev_priv(ndev);
struct lio_vf_rep_req rep_cfg;
struct octeon_device *oct;
int ret;
oct = vf_rep->oct;
memset(&rep_cfg, 0, sizeof(rep_cfg));
rep_cfg.req_type = LIO_VF_REP_REQ_MTU;
rep_cfg.ifidx = vf_rep->ifidx;
rep_cfg.rep_mtu.mtu = cpu_to_be32(new_mtu);
ret = lio_vf_rep_send_soft_command(oct, &rep_cfg,
sizeof(rep_cfg), NULL, 0);
if (ret) {
dev_err(&oct->pci_dev->dev,
"Change MTU failed with err %d\n", ret);
return -EIO;
}
ndev->mtu = new_mtu;
return 0;
}
static int
lio_vf_rep_phys_port_name(struct net_device *dev,
char *buf, size_t len)
{
struct lio_vf_rep_desc *vf_rep = netdev_priv(dev);
struct octeon_device *oct = vf_rep->oct;
int ret;
ret = snprintf(buf, len, "pf%dvf%d", oct->pf_num,
vf_rep->ifidx - oct->pf_num * 64 - 1);
if (ret >= len)
return -EOPNOTSUPP;
return 0;
}
static struct net_device *
lio_vf_rep_get_ndev(struct octeon_device *oct, int ifidx)
{
int vf_id, max_vfs = CN23XX_MAX_VFS_PER_PF + 1;
int vfid_mask = max_vfs - 1;
if (ifidx <= oct->pf_num * max_vfs ||
ifidx >= oct->pf_num * max_vfs + max_vfs)
return NULL;
/* ifidx 1-63 for PF0 VFs
* ifidx 65-127 for PF1 VFs
*/
vf_id = (ifidx & vfid_mask) - 1;
return oct->vf_rep_list.ndev[vf_id];
}
static void
lio_vf_rep_copy_packet(struct octeon_device *oct,
struct sk_buff *skb,
int len)
{
if (likely(len > MIN_SKB_SIZE)) {
struct octeon_skb_page_info *pg_info;
unsigned char *va;
pg_info = ((struct octeon_skb_page_info *)(skb->cb));
if (pg_info->page) {
va = page_address(pg_info->page) +
pg_info->page_offset;
memcpy(skb->data, va, MIN_SKB_SIZE);
skb_put(skb, MIN_SKB_SIZE);
}
skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags,
pg_info->page,
pg_info->page_offset + MIN_SKB_SIZE,
len - MIN_SKB_SIZE,
LIO_RXBUFFER_SZ);
} else {
struct octeon_skb_page_info *pg_info =
((struct octeon_skb_page_info *)(skb->cb));
skb_copy_to_linear_data(skb, page_address(pg_info->page) +
pg_info->page_offset, len);
skb_put(skb, len);
put_page(pg_info->page);
}
}
static int
lio_vf_rep_pkt_recv(struct octeon_recv_info *recv_info, void *buf)
{
struct octeon_recv_pkt *recv_pkt = recv_info->recv_pkt;
struct lio_vf_rep_desc *vf_rep;
struct net_device *vf_ndev;
struct octeon_device *oct;
union octeon_rh *rh;
struct sk_buff *skb;
int i, ifidx;
oct = lio_get_device(recv_pkt->octeon_id);
if (!oct)
goto free_buffers;
skb = recv_pkt->buffer_ptr[0];
rh = &recv_pkt->rh;
ifidx = rh->r.ossp;
vf_ndev = lio_vf_rep_get_ndev(oct, ifidx);
if (!vf_ndev)
goto free_buffers;
vf_rep = netdev_priv(vf_ndev);
if (!(atomic_read(&vf_rep->ifstate) & LIO_IFSTATE_RUNNING) ||
recv_pkt->buffer_count > 1)
goto free_buffers;
skb->dev = vf_ndev;
/* Multiple buffers are not used for vf_rep packets.
* So just buffer_size[0] is valid.
*/
lio_vf_rep_copy_packet(oct, skb, recv_pkt->buffer_size[0]);
skb_pull(skb, rh->r_dh.len * BYTES_PER_DHLEN_UNIT);
skb->protocol = eth_type_trans(skb, skb->dev);
skb->ip_summed = CHECKSUM_NONE;
netif_rx(skb);
octeon_free_recv_info(recv_info);
return 0;
free_buffers:
for (i = 0; i < recv_pkt->buffer_count; i++)
recv_buffer_free(recv_pkt->buffer_ptr[i]);
octeon_free_recv_info(recv_info);
return 0;
}
static void
lio_vf_rep_packet_sent_callback(struct octeon_device *oct,
u32 status, void *buf)
{
struct octeon_soft_command *sc = (struct octeon_soft_command *)buf;
struct sk_buff *skb = sc->ctxptr;
struct net_device *ndev = skb->dev;
u32 iq_no;
dma_unmap_single(&oct->pci_dev->dev, sc->dmadptr,
sc->datasize, DMA_TO_DEVICE);
dev_kfree_skb_any(skb);
iq_no = sc->iq_no;
octeon_free_soft_command(oct, sc);
if (octnet_iq_is_full(oct, iq_no))
return;
if (netif_queue_stopped(ndev))
netif_wake_queue(ndev);
}
static netdev_tx_t
lio_vf_rep_pkt_xmit(struct sk_buff *skb, struct net_device *ndev)
{
struct lio_vf_rep_desc *vf_rep = netdev_priv(ndev);
struct net_device *parent_ndev = vf_rep->parent_ndev;
struct octeon_device *oct = vf_rep->oct;
struct octeon_instr_pki_ih3 *pki_ih3;
struct octeon_soft_command *sc;
struct lio *parent_lio;
int status;
parent_lio = GET_LIO(parent_ndev);
if (!(atomic_read(&vf_rep->ifstate) & LIO_IFSTATE_RUNNING) ||
skb->len <= 0)
goto xmit_failed;
if (octnet_iq_is_full(vf_rep->oct, parent_lio->txq)) {
dev_err(&oct->pci_dev->dev, "VF rep: Device IQ full\n");
netif_stop_queue(ndev);
return NETDEV_TX_BUSY;
}
sc = (struct octeon_soft_command *)
octeon_alloc_soft_command(oct, 0, 16, 0);
if (!sc) {
dev_err(&oct->pci_dev->dev, "VF rep: Soft command alloc failed\n");
goto xmit_failed;
}
/* Multiple buffers are not used for vf_rep packets. */
if (skb_shinfo(skb)->nr_frags != 0) {
dev_err(&oct->pci_dev->dev, "VF rep: nr_frags != 0. Dropping packet\n");
octeon_free_soft_command(oct, sc);
goto xmit_failed;
}
sc->dmadptr = dma_map_single(&oct->pci_dev->dev,
skb->data, skb->len, DMA_TO_DEVICE);
if (dma_mapping_error(&oct->pci_dev->dev, sc->dmadptr)) {
dev_err(&oct->pci_dev->dev, "VF rep: DMA mapping failed\n");
octeon_free_soft_command(oct, sc);
goto xmit_failed;
}
sc->virtdptr = skb->data;
sc->datasize = skb->len;
sc->ctxptr = skb;
sc->iq_no = parent_lio->txq;
octeon_prepare_soft_command(oct, sc, OPCODE_NIC, OPCODE_NIC_VF_REP_PKT,
vf_rep->ifidx, 0, 0);
pki_ih3 = (struct octeon_instr_pki_ih3 *)&sc->cmd.cmd3.pki_ih3;
pki_ih3->tagtype = ORDERED_TAG;
sc->callback = lio_vf_rep_packet_sent_callback;
sc->callback_arg = sc;
status = octeon_send_soft_command(oct, sc);
if (status == IQ_SEND_FAILED) {
dma_unmap_single(&oct->pci_dev->dev, sc->dmadptr,
sc->datasize, DMA_TO_DEVICE);
octeon_free_soft_command(oct, sc);
goto xmit_failed;
}
if (status == IQ_SEND_STOP)
netif_stop_queue(ndev);
netif_trans_update(ndev);
return NETDEV_TX_OK;
xmit_failed:
dev_kfree_skb_any(skb);
return NETDEV_TX_OK;
}
static int lio_vf_get_port_parent_id(struct net_device *dev,
struct netdev_phys_item_id *ppid)
{
struct lio_vf_rep_desc *vf_rep = netdev_priv(dev);
struct net_device *parent_ndev = vf_rep->parent_ndev;
struct lio *lio = GET_LIO(parent_ndev);
ppid->id_len = ETH_ALEN;
ether_addr_copy(ppid->id, (void *)&lio->linfo.hw_addr + 2);
return 0;
}
static void
lio_vf_rep_fetch_stats(struct work_struct *work)
{
struct cavium_wk *wk = (struct cavium_wk *)work;
struct lio_vf_rep_desc *vf_rep = wk->ctxptr;
struct lio_vf_rep_stats stats;
struct lio_vf_rep_req rep_cfg;
struct octeon_device *oct;
int ret;
oct = vf_rep->oct;
memset(&rep_cfg, 0, sizeof(rep_cfg));
rep_cfg.req_type = LIO_VF_REP_REQ_STATS;
rep_cfg.ifidx = vf_rep->ifidx;
ret = lio_vf_rep_send_soft_command(oct, &rep_cfg, sizeof(rep_cfg),
&stats, sizeof(stats));
if (!ret) {
octeon_swap_8B_data((u64 *)&stats, (sizeof(stats) >> 3));
memcpy(&vf_rep->stats, &stats, sizeof(stats));
}
schedule_delayed_work(&vf_rep->stats_wk.work,
msecs_to_jiffies(LIO_VF_REP_STATS_POLL_TIME_MS));
}
int
lio_vf_rep_create(struct octeon_device *oct)
{
struct lio_vf_rep_desc *vf_rep;
struct net_device *ndev;
int i, num_vfs;
if (oct->eswitch_mode != DEVLINK_ESWITCH_MODE_SWITCHDEV)
return 0;
if (!oct->sriov_info.sriov_enabled)
return 0;
num_vfs = oct->sriov_info.num_vfs_alloced;
oct->vf_rep_list.num_vfs = 0;
for (i = 0; i < num_vfs; i++) {
ndev = alloc_etherdev(sizeof(struct lio_vf_rep_desc));
if (!ndev) {
dev_err(&oct->pci_dev->dev,
"VF rep device %d creation failed\n", i);
goto cleanup;
}
ndev->min_mtu = LIO_MIN_MTU_SIZE;
ndev->max_mtu = LIO_MAX_MTU_SIZE;
ndev->netdev_ops = &lio_vf_rep_ndev_ops;
vf_rep = netdev_priv(ndev);
memset(vf_rep, 0, sizeof(*vf_rep));
vf_rep->ndev = ndev;
vf_rep->oct = oct;
vf_rep->parent_ndev = oct->props[0].netdev;
vf_rep->ifidx = (oct->pf_num * 64) + i + 1;
eth_hw_addr_random(ndev);
if (register_netdev(ndev)) {
dev_err(&oct->pci_dev->dev, "VF rep nerdev registration failed\n");
free_netdev(ndev);
goto cleanup;
}
netif_carrier_off(ndev);
INIT_DELAYED_WORK(&vf_rep->stats_wk.work,
lio_vf_rep_fetch_stats);
vf_rep->stats_wk.ctxptr = (void *)vf_rep;
schedule_delayed_work(&vf_rep->stats_wk.work,
msecs_to_jiffies
(LIO_VF_REP_STATS_POLL_TIME_MS));
oct->vf_rep_list.num_vfs++;
oct->vf_rep_list.ndev[i] = ndev;
}
if (octeon_register_dispatch_fn(oct, OPCODE_NIC,
OPCODE_NIC_VF_REP_PKT,
lio_vf_rep_pkt_recv, oct)) {
dev_err(&oct->pci_dev->dev, "VF rep Dispatch func registration failed\n");
goto cleanup;
}
return 0;
cleanup:
for (i = 0; i < oct->vf_rep_list.num_vfs; i++) {
ndev = oct->vf_rep_list.ndev[i];
oct->vf_rep_list.ndev[i] = NULL;
if (ndev) {
vf_rep = netdev_priv(ndev);
cancel_delayed_work_sync
(&vf_rep->stats_wk.work);
unregister_netdev(ndev);
free_netdev(ndev);
}
}
oct->vf_rep_list.num_vfs = 0;
return -1;
}
void
lio_vf_rep_destroy(struct octeon_device *oct)
{
struct lio_vf_rep_desc *vf_rep;
struct net_device *ndev;
int i;
if (oct->eswitch_mode != DEVLINK_ESWITCH_MODE_SWITCHDEV)
return;
if (!oct->sriov_info.sriov_enabled)
return;
for (i = 0; i < oct->vf_rep_list.num_vfs; i++) {
ndev = oct->vf_rep_list.ndev[i];
oct->vf_rep_list.ndev[i] = NULL;
if (ndev) {
vf_rep = netdev_priv(ndev);
cancel_delayed_work_sync
(&vf_rep->stats_wk.work);
netif_tx_disable(ndev);
netif_carrier_off(ndev);
unregister_netdev(ndev);
free_netdev(ndev);
}
}
oct->vf_rep_list.num_vfs = 0;
}
static int
lio_vf_rep_netdev_event(struct notifier_block *nb,
unsigned long event, void *ptr)
{
struct net_device *ndev = netdev_notifier_info_to_dev(ptr);
struct lio_vf_rep_desc *vf_rep;
struct lio_vf_rep_req rep_cfg;
struct octeon_device *oct;
int ret;
switch (event) {
case NETDEV_REGISTER:
case NETDEV_CHANGENAME:
break;
default:
return NOTIFY_DONE;
}
if (ndev->netdev_ops != &lio_vf_rep_ndev_ops)
return NOTIFY_DONE;
vf_rep = netdev_priv(ndev);
oct = vf_rep->oct;
if (strlen(ndev->name) > LIO_IF_NAME_SIZE) {
dev_err(&oct->pci_dev->dev,
"Device name change sync failed as the size is > %d\n",
LIO_IF_NAME_SIZE);
return NOTIFY_DONE;
}
memset(&rep_cfg, 0, sizeof(rep_cfg));
rep_cfg.req_type = LIO_VF_REP_REQ_DEVNAME;
rep_cfg.ifidx = vf_rep->ifidx;
strncpy(rep_cfg.rep_name.name, ndev->name, LIO_IF_NAME_SIZE);
ret = lio_vf_rep_send_soft_command(oct, &rep_cfg,
sizeof(rep_cfg), NULL, 0);
if (ret)
dev_err(&oct->pci_dev->dev,
"vf_rep netdev name change failed with err %d\n", ret);
return NOTIFY_DONE;
}
static struct notifier_block lio_vf_rep_netdev_notifier = {
.notifier_call = lio_vf_rep_netdev_event,
};
int
lio_vf_rep_modinit(void)
{
if (register_netdevice_notifier(&lio_vf_rep_netdev_notifier)) {
pr_err("netdev notifier registration failed\n");
return -EFAULT;
}
return 0;
}
void
lio_vf_rep_modexit(void)
{
if (unregister_netdevice_notifier(&lio_vf_rep_netdev_notifier))
pr_err("netdev notifier unregister failed\n");
}