/*
* Copyright(c) 2017 - 2018 Intel Corporation.
*
* This file is provided under a dual BSD/GPLv2 license. When using or
* redistributing this file, you may do so under either license.
*
* GPL LICENSE SUMMARY
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* BSD LICENSE
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* - Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
/*
* This file contains HFI1 support for VNIC functionality
*/
#include <linux/io.h>
#include <linux/if_vlan.h>
#include "vnic.h"
#define HFI_TX_TIMEOUT_MS 1000
#define HFI1_VNIC_RCV_Q_SIZE 1024
#define HFI1_VNIC_UP 0
static DEFINE_SPINLOCK(vport_cntr_lock);
static int setup_vnic_ctxt(struct hfi1_devdata *dd, struct hfi1_ctxtdata *uctxt)
{
unsigned int rcvctrl_ops = 0;
int ret;
uctxt->do_interrupt = &handle_receive_interrupt;
/* Now allocate the RcvHdr queue and eager buffers. */
ret = hfi1_create_rcvhdrq(dd, uctxt);
if (ret)
goto done;
ret = hfi1_setup_eagerbufs(uctxt);
if (ret)
goto done;
if (uctxt->rcvhdrtail_kvaddr)
clear_rcvhdrtail(uctxt);
rcvctrl_ops = HFI1_RCVCTRL_CTXT_ENB;
rcvctrl_ops |= HFI1_RCVCTRL_INTRAVAIL_ENB;
if (!HFI1_CAP_KGET_MASK(uctxt->flags, MULTI_PKT_EGR))
rcvctrl_ops |= HFI1_RCVCTRL_ONE_PKT_EGR_ENB;
if (HFI1_CAP_KGET_MASK(uctxt->flags, NODROP_EGR_FULL))
rcvctrl_ops |= HFI1_RCVCTRL_NO_EGR_DROP_ENB;
if (HFI1_CAP_KGET_MASK(uctxt->flags, NODROP_RHQ_FULL))
rcvctrl_ops |= HFI1_RCVCTRL_NO_RHQ_DROP_ENB;
if (HFI1_CAP_KGET_MASK(uctxt->flags, DMA_RTAIL))
rcvctrl_ops |= HFI1_RCVCTRL_TAILUPD_ENB;
hfi1_rcvctrl(uctxt->dd, rcvctrl_ops, uctxt);
done:
return ret;
}
static int allocate_vnic_ctxt(struct hfi1_devdata *dd,
struct hfi1_ctxtdata **vnic_ctxt)
{
struct hfi1_ctxtdata *uctxt;
int ret;
if (dd->flags & HFI1_FROZEN)
return -EIO;
ret = hfi1_create_ctxtdata(dd->pport, dd->node, &uctxt);
if (ret < 0) {
dd_dev_err(dd, "Unable to create ctxtdata, failing open\n");
return -ENOMEM;
}
uctxt->flags = HFI1_CAP_KGET(MULTI_PKT_EGR) |
HFI1_CAP_KGET(NODROP_RHQ_FULL) |
HFI1_CAP_KGET(NODROP_EGR_FULL) |
HFI1_CAP_KGET(DMA_RTAIL);
uctxt->seq_cnt = 1;
uctxt->is_vnic = true;
msix_request_rcd_irq(uctxt);
hfi1_stats.sps_ctxts++;
dd_dev_dbg(dd, "created vnic context %d\n", uctxt->ctxt);
*vnic_ctxt = uctxt;
return 0;
}
static void deallocate_vnic_ctxt(struct hfi1_devdata *dd,
struct hfi1_ctxtdata *uctxt)
{
dd_dev_dbg(dd, "closing vnic context %d\n", uctxt->ctxt);
flush_wc();
/*
* Disable receive context and interrupt available, reset all
* RcvCtxtCtrl bits to default values.
*/
hfi1_rcvctrl(dd, HFI1_RCVCTRL_CTXT_DIS |
HFI1_RCVCTRL_TIDFLOW_DIS |
HFI1_RCVCTRL_INTRAVAIL_DIS |
HFI1_RCVCTRL_ONE_PKT_EGR_DIS |
HFI1_RCVCTRL_NO_RHQ_DROP_DIS |
HFI1_RCVCTRL_NO_EGR_DROP_DIS, uctxt);
/* msix_intr will always be > 0, only clean up if this is true */
if (uctxt->msix_intr)
msix_free_irq(dd, uctxt->msix_intr);
uctxt->event_flags = 0;
hfi1_clear_tids(uctxt);
hfi1_clear_ctxt_pkey(dd, uctxt);
hfi1_stats.sps_ctxts--;
hfi1_free_ctxt(uctxt);
}
void hfi1_vnic_setup(struct hfi1_devdata *dd)
{
idr_init(&dd->vnic.vesw_idr);
}
void hfi1_vnic_cleanup(struct hfi1_devdata *dd)
{
idr_destroy(&dd->vnic.vesw_idr);
}
#define SUM_GRP_COUNTERS(stats, qstats, x_grp) do { \
u64 *src64, *dst64; \
for (src64 = &qstats->x_grp.unicast, \
dst64 = &stats->x_grp.unicast; \
dst64 <= &stats->x_grp.s_1519_max;) { \
*dst64++ += *src64++; \
} \
} while (0)
/* hfi1_vnic_update_stats - update statistics */
static void hfi1_vnic_update_stats(struct hfi1_vnic_vport_info *vinfo,
struct opa_vnic_stats *stats)
{
struct net_device *netdev = vinfo->netdev;
u8 i;
/* add tx counters on different queues */
for (i = 0; i < vinfo->num_tx_q; i++) {
struct opa_vnic_stats *qstats = &vinfo->stats[i];
struct rtnl_link_stats64 *qnstats = &vinfo->stats[i].netstats;
stats->netstats.tx_fifo_errors += qnstats->tx_fifo_errors;
stats->netstats.tx_carrier_errors += qnstats->tx_carrier_errors;
stats->tx_drop_state += qstats->tx_drop_state;
stats->tx_dlid_zero += qstats->tx_dlid_zero;
SUM_GRP_COUNTERS(stats, qstats, tx_grp);
stats->netstats.tx_packets += qnstats->tx_packets;
stats->netstats.tx_bytes += qnstats->tx_bytes;
}
/* add rx counters on different queues */
for (i = 0; i < vinfo->num_rx_q; i++) {
struct opa_vnic_stats *qstats = &vinfo->stats[i];
struct rtnl_link_stats64 *qnstats = &vinfo->stats[i].netstats;
stats->netstats.rx_fifo_errors += qnstats->rx_fifo_errors;
stats->netstats.rx_nohandler += qnstats->rx_nohandler;
stats->rx_drop_state += qstats->rx_drop_state;
stats->rx_oversize += qstats->rx_oversize;
stats->rx_runt += qstats->rx_runt;
SUM_GRP_COUNTERS(stats, qstats, rx_grp);
stats->netstats.rx_packets += qnstats->rx_packets;
stats->netstats.rx_bytes += qnstats->rx_bytes;
}
stats->netstats.tx_errors = stats->netstats.tx_fifo_errors +
stats->netstats.tx_carrier_errors +
stats->tx_drop_state + stats->tx_dlid_zero;
stats->netstats.tx_dropped = stats->netstats.tx_errors;
stats->netstats.rx_errors = stats->netstats.rx_fifo_errors +
stats->netstats.rx_nohandler +
stats->rx_drop_state + stats->rx_oversize +
stats->rx_runt;
stats->netstats.rx_dropped = stats->netstats.rx_errors;
netdev->stats.tx_packets = stats->netstats.tx_packets;
netdev->stats.tx_bytes = stats->netstats.tx_bytes;
netdev->stats.tx_fifo_errors = stats->netstats.tx_fifo_errors;
netdev->stats.tx_carrier_errors = stats->netstats.tx_carrier_errors;
netdev->stats.tx_errors = stats->netstats.tx_errors;
netdev->stats.tx_dropped = stats->netstats.tx_dropped;
netdev->stats.rx_packets = stats->netstats.rx_packets;
netdev->stats.rx_bytes = stats->netstats.rx_bytes;
netdev->stats.rx_fifo_errors = stats->netstats.rx_fifo_errors;
netdev->stats.multicast = stats->rx_grp.mcastbcast;
netdev->stats.rx_length_errors = stats->rx_oversize + stats->rx_runt;
netdev->stats.rx_errors = stats->netstats.rx_errors;
netdev->stats.rx_dropped = stats->netstats.rx_dropped;
}
/* update_len_counters - update pkt's len histogram counters */
static inline void update_len_counters(struct opa_vnic_grp_stats *grp,
int len)
{
/* account for 4 byte FCS */
if (len >= 1515)
grp->s_1519_max++;
else if (len >= 1020)
grp->s_1024_1518++;
else if (len >= 508)
grp->s_512_1023++;
else if (len >= 252)
grp->s_256_511++;
else if (len >= 124)
grp->s_128_255++;
else if (len >= 61)
grp->s_65_127++;
else
grp->s_64++;
}
/* hfi1_vnic_update_tx_counters - update transmit counters */
static void hfi1_vnic_update_tx_counters(struct hfi1_vnic_vport_info *vinfo,
u8 q_idx, struct sk_buff *skb, int err)
{
struct ethhdr *mac_hdr = (struct ethhdr *)skb_mac_header(skb);
struct opa_vnic_stats *stats = &vinfo->stats[q_idx];
struct opa_vnic_grp_stats *tx_grp = &stats->tx_grp;
u16 vlan_tci;
stats->netstats.tx_packets++;
stats->netstats.tx_bytes += skb->len + ETH_FCS_LEN;
update_len_counters(tx_grp, skb->len);
/* rest of the counts are for good packets only */
if (unlikely(err))
return;
if (is_multicast_ether_addr(mac_hdr->h_dest))
tx_grp->mcastbcast++;
else
tx_grp->unicast++;
if (!__vlan_get_tag(skb, &vlan_tci))
tx_grp->vlan++;
else
tx_grp->untagged++;
}
/* hfi1_vnic_update_rx_counters - update receive counters */
static void hfi1_vnic_update_rx_counters(struct hfi1_vnic_vport_info *vinfo,
u8 q_idx, struct sk_buff *skb, int err)
{
struct ethhdr *mac_hdr = (struct ethhdr *)skb->data;
struct opa_vnic_stats *stats = &vinfo->stats[q_idx];
struct opa_vnic_grp_stats *rx_grp = &stats->rx_grp;
u16 vlan_tci;
stats->netstats.rx_packets++;
stats->netstats.rx_bytes += skb->len + ETH_FCS_LEN;
update_len_counters(rx_grp, skb->len);
/* rest of the counts are for good packets only */
if (unlikely(err))
return;
if (is_multicast_ether_addr(mac_hdr->h_dest))
rx_grp->mcastbcast++;
else
rx_grp->unicast++;
if (!__vlan_get_tag(skb, &vlan_tci))
rx_grp->vlan++;
else
rx_grp->untagged++;
}
/* This function is overloaded for opa_vnic specific implementation */
static void hfi1_vnic_get_stats64(struct net_device *netdev,
struct rtnl_link_stats64 *stats)
{
struct opa_vnic_stats *vstats = (struct opa_vnic_stats *)stats;
struct hfi1_vnic_vport_info *vinfo = opa_vnic_dev_priv(netdev);
hfi1_vnic_update_stats(vinfo, vstats);
}
static u64 create_bypass_pbc(u32 vl, u32 dw_len)
{
u64 pbc;
pbc = ((u64)PBC_IHCRC_NONE << PBC_INSERT_HCRC_SHIFT)
| PBC_INSERT_BYPASS_ICRC | PBC_CREDIT_RETURN
| PBC_PACKET_BYPASS
| ((vl & PBC_VL_MASK) << PBC_VL_SHIFT)
| (dw_len & PBC_LENGTH_DWS_MASK) << PBC_LENGTH_DWS_SHIFT;
return pbc;
}
/* hfi1_vnic_maybe_stop_tx - stop tx queue if required */
static void hfi1_vnic_maybe_stop_tx(struct hfi1_vnic_vport_info *vinfo,
u8 q_idx)
{
netif_stop_subqueue(vinfo->netdev, q_idx);
if (!hfi1_vnic_sdma_write_avail(vinfo, q_idx))
return;
netif_start_subqueue(vinfo->netdev, q_idx);
}
static netdev_tx_t hfi1_netdev_start_xmit(struct sk_buff *skb,
struct net_device *netdev)
{
struct hfi1_vnic_vport_info *vinfo = opa_vnic_dev_priv(netdev);
u8 pad_len, q_idx = skb->queue_mapping;
struct hfi1_devdata *dd = vinfo->dd;
struct opa_vnic_skb_mdata *mdata;
u32 pkt_len, total_len;
int err = -EINVAL;
u64 pbc;
v_dbg("xmit: queue %d skb len %d\n", q_idx, skb->len);
if (unlikely(!netif_oper_up(netdev))) {
vinfo->stats[q_idx].tx_drop_state++;
goto tx_finish;
}
/* take out meta data */
mdata = (struct opa_vnic_skb_mdata *)skb->data;
skb_pull(skb, sizeof(*mdata));
if (unlikely(mdata->flags & OPA_VNIC_SKB_MDATA_ENCAP_ERR)) {
vinfo->stats[q_idx].tx_dlid_zero++;
goto tx_finish;
}
/* add tail padding (for 8 bytes size alignment) and icrc */
pad_len = -(skb->len + OPA_VNIC_ICRC_TAIL_LEN) & 0x7;
pad_len += OPA_VNIC_ICRC_TAIL_LEN;
/*
* pkt_len is how much data we have to write, includes header and data.
* total_len is length of the packet in Dwords plus the PBC should not
* include the CRC.
*/
pkt_len = (skb->len + pad_len) >> 2;
total_len = pkt_len + 2; /* PBC + packet */
pbc = create_bypass_pbc(mdata->vl, total_len);
skb_get(skb);
v_dbg("pbc 0x%016llX len %d pad_len %d\n", pbc, skb->len, pad_len);
err = dd->process_vnic_dma_send(dd, q_idx, vinfo, skb, pbc, pad_len);
if (unlikely(err)) {
if (err == -ENOMEM)
vinfo->stats[q_idx].netstats.tx_fifo_errors++;
else if (err != -EBUSY)
vinfo->stats[q_idx].netstats.tx_carrier_errors++;
}
/* remove the header before updating tx counters */
skb_pull(skb, OPA_VNIC_HDR_LEN);
if (unlikely(err == -EBUSY)) {
hfi1_vnic_maybe_stop_tx(vinfo, q_idx);
dev_kfree_skb_any(skb);
return NETDEV_TX_BUSY;
}
tx_finish:
/* update tx counters */
hfi1_vnic_update_tx_counters(vinfo, q_idx, skb, err);
dev_kfree_skb_any(skb);
return NETDEV_TX_OK;
}
static u16 hfi1_vnic_select_queue(struct net_device *netdev,
struct sk_buff *skb,
struct net_device *sb_dev,
select_queue_fallback_t fallback)
{
struct hfi1_vnic_vport_info *vinfo = opa_vnic_dev_priv(netdev);
struct opa_vnic_skb_mdata *mdata;
struct sdma_engine *sde;
mdata = (struct opa_vnic_skb_mdata *)skb->data;
sde = sdma_select_engine_vl(vinfo->dd, mdata->entropy, mdata->vl);
return sde->this_idx;
}
/* hfi1_vnic_decap_skb - strip OPA header from the skb (ethernet) packet */
static inline int hfi1_vnic_decap_skb(struct hfi1_vnic_rx_queue *rxq,
struct sk_buff *skb)
{
struct hfi1_vnic_vport_info *vinfo = rxq->vinfo;
int max_len = vinfo->netdev->mtu + VLAN_ETH_HLEN;
int rc = -EFAULT;
skb_pull(skb, OPA_VNIC_HDR_LEN);
/* Validate Packet length */
if (unlikely(skb->len > max_len))
vinfo->stats[rxq->idx].rx_oversize++;
else if (unlikely(skb->len < ETH_ZLEN))
vinfo->stats[rxq->idx].rx_runt++;
else
rc = 0;
return rc;
}
static inline struct sk_buff *hfi1_vnic_get_skb(struct hfi1_vnic_rx_queue *rxq)
{
unsigned char *pad_info;
struct sk_buff *skb;
skb = skb_dequeue(&rxq->skbq);
if (unlikely(!skb))
return NULL;
/* remove tail padding and icrc */
pad_info = skb->data + skb->len - 1;
skb_trim(skb, (skb->len - OPA_VNIC_ICRC_TAIL_LEN -
((*pad_info) & 0x7)));
return skb;
}
/* hfi1_vnic_handle_rx - handle skb receive */
static void hfi1_vnic_handle_rx(struct hfi1_vnic_rx_queue *rxq,
int *work_done, int work_to_do)
{
struct hfi1_vnic_vport_info *vinfo = rxq->vinfo;
struct sk_buff *skb;
int rc;
while (1) {
if (*work_done >= work_to_do)
break;
skb = hfi1_vnic_get_skb(rxq);
if (unlikely(!skb))
break;
rc = hfi1_vnic_decap_skb(rxq, skb);
/* update rx counters */
hfi1_vnic_update_rx_counters(vinfo, rxq->idx, skb, rc);
if (unlikely(rc)) {
dev_kfree_skb_any(skb);
continue;
}
skb_checksum_none_assert(skb);
skb->protocol = eth_type_trans(skb, rxq->netdev);
napi_gro_receive(&rxq->napi, skb);
(*work_done)++;
}
}
/* hfi1_vnic_napi - napi receive polling callback function */
static int hfi1_vnic_napi(struct napi_struct *napi, int budget)
{
struct hfi1_vnic_rx_queue *rxq = container_of(napi,
struct hfi1_vnic_rx_queue, napi);
struct hfi1_vnic_vport_info *vinfo = rxq->vinfo;
int work_done = 0;
v_dbg("napi %d budget %d\n", rxq->idx, budget);
hfi1_vnic_handle_rx(rxq, &work_done, budget);
v_dbg("napi %d work_done %d\n", rxq->idx, work_done);
if (work_done < budget)
napi_complete(napi);
return work_done;
}
void hfi1_vnic_bypass_rcv(struct hfi1_packet *packet)
{
struct hfi1_devdata *dd = packet->rcd->dd;
struct hfi1_vnic_vport_info *vinfo = NULL;
struct hfi1_vnic_rx_queue *rxq;
struct sk_buff *skb;
int l4_type, vesw_id = -1;
u8 q_idx;
l4_type = hfi1_16B_get_l4(packet->ebuf);
if (likely(l4_type == OPA_16B_L4_ETHR)) {
vesw_id = HFI1_VNIC_GET_VESWID(packet->ebuf);
vinfo = idr_find(&dd->vnic.vesw_idr, vesw_id);
/*
* In case of invalid vesw id, count the error on
* the first available vport.
*/
if (unlikely(!vinfo)) {
struct hfi1_vnic_vport_info *vinfo_tmp;
int id_tmp = 0;
vinfo_tmp = idr_get_next(&dd->vnic.vesw_idr, &id_tmp);
if (vinfo_tmp) {
spin_lock(&vport_cntr_lock);
vinfo_tmp->stats[0].netstats.rx_nohandler++;
spin_unlock(&vport_cntr_lock);
}
}
}
if (unlikely(!vinfo)) {
dd_dev_warn(dd, "vnic rcv err: l4 %d vesw id %d ctx %d\n",
l4_type, vesw_id, packet->rcd->ctxt);
return;
}
q_idx = packet->rcd->vnic_q_idx;
rxq = &vinfo->rxq[q_idx];
if (unlikely(!netif_oper_up(vinfo->netdev))) {
vinfo->stats[q_idx].rx_drop_state++;
skb_queue_purge(&rxq->skbq);
return;
}
if (unlikely(skb_queue_len(&rxq->skbq) > HFI1_VNIC_RCV_Q_SIZE)) {
vinfo->stats[q_idx].netstats.rx_fifo_errors++;
return;
}
skb = netdev_alloc_skb(vinfo->netdev, packet->tlen);
if (unlikely(!skb)) {
vinfo->stats[q_idx].netstats.rx_fifo_errors++;
return;
}
memcpy(skb->data, packet->ebuf, packet->tlen);
skb_put(skb, packet->tlen);
skb_queue_tail(&rxq->skbq, skb);
if (napi_schedule_prep(&rxq->napi)) {
v_dbg("napi %d scheduling\n", q_idx);
__napi_schedule(&rxq->napi);
}
}
static int hfi1_vnic_up(struct hfi1_vnic_vport_info *vinfo)
{
struct hfi1_devdata *dd = vinfo->dd;
struct net_device *netdev = vinfo->netdev;
int i, rc;
/* ensure virtual eth switch id is valid */
if (!vinfo->vesw_id)
return -EINVAL;
rc = idr_alloc(&dd->vnic.vesw_idr, vinfo, vinfo->vesw_id,
vinfo->vesw_id + 1, GFP_NOWAIT);
if (rc < 0)
return rc;
for (i = 0; i < vinfo->num_rx_q; i++) {
struct hfi1_vnic_rx_queue *rxq = &vinfo->rxq[i];
skb_queue_head_init(&rxq->skbq);
napi_enable(&rxq->napi);
}
netif_carrier_on(netdev);
netif_tx_start_all_queues(netdev);
set_bit(HFI1_VNIC_UP, &vinfo->flags);
return 0;
}
static void hfi1_vnic_down(struct hfi1_vnic_vport_info *vinfo)
{
struct hfi1_devdata *dd = vinfo->dd;
u8 i;
clear_bit(HFI1_VNIC_UP, &vinfo->flags);
netif_carrier_off(vinfo->netdev);
netif_tx_disable(vinfo->netdev);
idr_remove(&dd->vnic.vesw_idr, vinfo->vesw_id);
/* ensure irqs see the change */
msix_vnic_synchronize_irq(dd);
/* remove unread skbs */
for (i = 0; i < vinfo->num_rx_q; i++) {
struct hfi1_vnic_rx_queue *rxq = &vinfo->rxq[i];
napi_disable(&rxq->napi);
skb_queue_purge(&rxq->skbq);
}
}
static int hfi1_netdev_open(struct net_device *netdev)
{
struct hfi1_vnic_vport_info *vinfo = opa_vnic_dev_priv(netdev);
int rc;
mutex_lock(&vinfo->lock);
rc = hfi1_vnic_up(vinfo);
mutex_unlock(&vinfo->lock);
return rc;
}
static int hfi1_netdev_close(struct net_device *netdev)
{
struct hfi1_vnic_vport_info *vinfo = opa_vnic_dev_priv(netdev);
mutex_lock(&vinfo->lock);
if (test_bit(HFI1_VNIC_UP, &vinfo->flags))
hfi1_vnic_down(vinfo);
mutex_unlock(&vinfo->lock);
return 0;
}
static int hfi1_vnic_allot_ctxt(struct hfi1_devdata *dd,
struct hfi1_ctxtdata **vnic_ctxt)
{
int rc;
rc = allocate_vnic_ctxt(dd, vnic_ctxt);
if (rc) {
dd_dev_err(dd, "vnic ctxt alloc failed %d\n", rc);
return rc;
}
rc = setup_vnic_ctxt(dd, *vnic_ctxt);
if (rc) {
dd_dev_err(dd, "vnic ctxt setup failed %d\n", rc);
deallocate_vnic_ctxt(dd, *vnic_ctxt);
*vnic_ctxt = NULL;
}
return rc;
}
static int hfi1_vnic_init(struct hfi1_vnic_vport_info *vinfo)
{
struct hfi1_devdata *dd = vinfo->dd;
int i, rc = 0;
mutex_lock(&hfi1_mutex);
if (!dd->vnic.num_vports) {
rc = hfi1_vnic_txreq_init(dd);
if (rc)
goto txreq_fail;
}
for (i = dd->vnic.num_ctxt; i < vinfo->num_rx_q; i++) {
rc = hfi1_vnic_allot_ctxt(dd, &dd->vnic.ctxt[i]);
if (rc)
break;
hfi1_rcd_get(dd->vnic.ctxt[i]);
dd->vnic.ctxt[i]->vnic_q_idx = i;
}
if (i < vinfo->num_rx_q) {
/*
* If required amount of contexts is not
* allocated successfully then remaining contexts
* are released.
*/
while (i-- > dd->vnic.num_ctxt) {
deallocate_vnic_ctxt(dd, dd->vnic.ctxt[i]);
hfi1_rcd_put(dd->vnic.ctxt[i]);
dd->vnic.ctxt[i] = NULL;
}
goto alloc_fail;
}
if (dd->vnic.num_ctxt != i) {
dd->vnic.num_ctxt = i;
hfi1_init_vnic_rsm(dd);
}
dd->vnic.num_vports++;
hfi1_vnic_sdma_init(vinfo);
alloc_fail:
if (!dd->vnic.num_vports)
hfi1_vnic_txreq_deinit(dd);
txreq_fail:
mutex_unlock(&hfi1_mutex);
return rc;
}
static void hfi1_vnic_deinit(struct hfi1_vnic_vport_info *vinfo)
{
struct hfi1_devdata *dd = vinfo->dd;
int i;
mutex_lock(&hfi1_mutex);
if (--dd->vnic.num_vports == 0) {
for (i = 0; i < dd->vnic.num_ctxt; i++) {
deallocate_vnic_ctxt(dd, dd->vnic.ctxt[i]);
hfi1_rcd_put(dd->vnic.ctxt[i]);
dd->vnic.ctxt[i] = NULL;
}
hfi1_deinit_vnic_rsm(dd);
dd->vnic.num_ctxt = 0;
hfi1_vnic_txreq_deinit(dd);
}
mutex_unlock(&hfi1_mutex);
}
static void hfi1_vnic_set_vesw_id(struct net_device *netdev, int id)
{
struct hfi1_vnic_vport_info *vinfo = opa_vnic_dev_priv(netdev);
bool reopen = false;
/*
* If vesw_id is being changed, and if the vnic port is up,
* reset the vnic port to ensure new vesw_id gets picked up
*/
if (id != vinfo->vesw_id) {
mutex_lock(&vinfo->lock);
if (test_bit(HFI1_VNIC_UP, &vinfo->flags)) {
hfi1_vnic_down(vinfo);
reopen = true;
}
vinfo->vesw_id = id;
if (reopen)
hfi1_vnic_up(vinfo);
mutex_unlock(&vinfo->lock);
}
}
/* netdev ops */
static const struct net_device_ops hfi1_netdev_ops = {
.ndo_open = hfi1_netdev_open,
.ndo_stop = hfi1_netdev_close,
.ndo_start_xmit = hfi1_netdev_start_xmit,
.ndo_select_queue = hfi1_vnic_select_queue,
.ndo_get_stats64 = hfi1_vnic_get_stats64,
};
static void hfi1_vnic_free_rn(struct net_device *netdev)
{
struct hfi1_vnic_vport_info *vinfo = opa_vnic_dev_priv(netdev);
hfi1_vnic_deinit(vinfo);
mutex_destroy(&vinfo->lock);
free_netdev(netdev);
}
struct net_device *hfi1_vnic_alloc_rn(struct ib_device *device,
u8 port_num,
enum rdma_netdev_t type,
const char *name,
unsigned char name_assign_type,
void (*setup)(struct net_device *))
{
struct hfi1_devdata *dd = dd_from_ibdev(device);
struct hfi1_vnic_vport_info *vinfo;
struct net_device *netdev;
struct rdma_netdev *rn;
int i, size, rc;
if (!dd->num_vnic_contexts)
return ERR_PTR(-ENOMEM);
if (!port_num || (port_num > dd->num_pports))
return ERR_PTR(-EINVAL);
if (type != RDMA_NETDEV_OPA_VNIC)
return ERR_PTR(-EOPNOTSUPP);
size = sizeof(struct opa_vnic_rdma_netdev) + sizeof(*vinfo);
netdev = alloc_netdev_mqs(size, name, name_assign_type, setup,
dd->num_sdma, dd->num_vnic_contexts);
if (!netdev)
return ERR_PTR(-ENOMEM);
rn = netdev_priv(netdev);
vinfo = opa_vnic_dev_priv(netdev);
vinfo->dd = dd;
vinfo->num_tx_q = dd->num_sdma;
vinfo->num_rx_q = dd->num_vnic_contexts;
vinfo->netdev = netdev;
rn->free_rdma_netdev = hfi1_vnic_free_rn;
rn->set_id = hfi1_vnic_set_vesw_id;
netdev->features = NETIF_F_HIGHDMA | NETIF_F_SG;
netdev->hw_features = netdev->features;
netdev->vlan_features = netdev->features;
netdev->watchdog_timeo = msecs_to_jiffies(HFI_TX_TIMEOUT_MS);
netdev->netdev_ops = &hfi1_netdev_ops;
mutex_init(&vinfo->lock);
for (i = 0; i < vinfo->num_rx_q; i++) {
struct hfi1_vnic_rx_queue *rxq = &vinfo->rxq[i];
rxq->idx = i;
rxq->vinfo = vinfo;
rxq->netdev = netdev;
netif_napi_add(netdev, &rxq->napi, hfi1_vnic_napi, 64);
}
rc = hfi1_vnic_init(vinfo);
if (rc)
goto init_fail;
return netdev;
init_fail:
mutex_destroy(&vinfo->lock);
free_netdev(netdev);
return ERR_PTR(rc);
}
