Commit d4829ea6 authored by Vishwanathapura, Niranjana's avatar Vishwanathapura, Niranjana Committed by Doug Ledford

IB/hfi1: OPA_VNIC RDMA netdev support

Add support to create and free OPA_VNIC rdma netdev devices.
Implement netstack interface functionality including xmit_skb,
receive side NAPI etc. Also implement rdma netdev control functions.
Reviewed-by: default avatarDennis Dalessandro <dennis.dalessandro@intel.com>
Reviewed-by: default avatarIra Weiny <ira.weiny@intel.com>
Signed-off-by: default avatarNiranjana Vishwanathapura <niranjana.vishwanathapura@intel.com>
Signed-off-by: default avatarAndrzej Kacprowski <andrzej.kacprowski@intel.com>
Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
parent 1bd671ab
......@@ -12,7 +12,7 @@ hfi1-y := affinity.o chip.o device.o driver.o efivar.o \
init.o intr.o mad.o mmu_rb.o pcie.o pio.o pio_copy.o platform.o \
qp.o qsfp.o rc.o ruc.o sdma.o sysfs.o trace.o \
uc.o ud.o user_exp_rcv.o user_pages.o user_sdma.o verbs.o \
verbs_txreq.o
verbs_txreq.o vnic_main.o
hfi1-$(CONFIG_DEBUG_FS) += debugfs.o
CFLAGS_trace.o = -I$(src)
......
/*
* Copyright(c) 2015, 2016 Intel Corporation.
* Copyright(c) 2015-2017 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.
......@@ -60,6 +60,7 @@
#include "qp.h"
#include "sdma.h"
#include "debugfs.h"
#include "vnic.h"
#undef pr_fmt
#define pr_fmt(fmt) DRIVER_NAME ": " fmt
......@@ -1381,15 +1382,31 @@ int process_receive_ib(struct hfi1_packet *packet)
return RHF_RCV_CONTINUE;
}
static inline bool hfi1_is_vnic_packet(struct hfi1_packet *packet)
{
/* Packet received in VNIC context via RSM */
if (packet->rcd->is_vnic)
return true;
if ((HFI1_GET_L2_TYPE(packet->ebuf) == OPA_VNIC_L2_TYPE) &&
(HFI1_GET_L4_TYPE(packet->ebuf) == OPA_VNIC_L4_ETHR))
return true;
return false;
}
int process_receive_bypass(struct hfi1_packet *packet)
{
struct hfi1_devdata *dd = packet->rcd->dd;
if (unlikely(rhf_err_flags(packet->rhf)))
if (unlikely(rhf_err_flags(packet->rhf))) {
handle_eflags(packet);
} else if (hfi1_is_vnic_packet(packet)) {
hfi1_vnic_bypass_rcv(packet);
return RHF_RCV_CONTINUE;
}
dd_dev_err(dd,
"Bypass packets are not supported in normal operation. Dropping\n");
dd_dev_err(dd, "Unsupported bypass packet. Dropping\n");
incr_cntr64(&dd->sw_rcv_bypass_packet_errors);
if (!(dd->err_info_rcvport.status_and_code & OPA_EI_STATUS_SMASK)) {
u64 *flits = packet->ebuf;
......
#ifndef _HFI1_KERNEL_H
#define _HFI1_KERNEL_H
/*
* Copyright(c) 2015, 2016 Intel Corporation.
* Copyright(c) 2015-2017 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.
......@@ -337,6 +337,12 @@ struct hfi1_ctxtdata {
* packets with the wrong interrupt handler.
*/
int (*do_interrupt)(struct hfi1_ctxtdata *rcd, int threaded);
/* Indicates that this is vnic context */
bool is_vnic;
/* vnic queue index this context is mapped to */
u8 vnic_q_idx;
};
/*
......@@ -808,6 +814,19 @@ struct hfi1_asic_data {
struct hfi1_i2c_bus *i2c_bus1;
};
/*
* Number of VNIC contexts used. Ensure it is less than or equal to
* max queues supported by VNIC (HFI1_VNIC_MAX_QUEUE).
*/
#define HFI1_NUM_VNIC_CTXT 8
/* Virtual NIC information */
struct hfi1_vnic_data {
struct idr vesw_idr;
};
struct hfi1_vnic_vport_info;
/* device data struct now contains only "general per-device" info.
* fields related to a physical IB port are in a hfi1_pportdata struct.
*/
......@@ -1115,6 +1134,9 @@ struct hfi1_devdata {
send_routine process_dma_send;
void (*pio_inline_send)(struct hfi1_devdata *dd, struct pio_buf *pbuf,
u64 pbc, const void *from, size_t count);
int (*process_vnic_dma_send)(struct hfi1_devdata *dd, u8 q_idx,
struct hfi1_vnic_vport_info *vinfo,
struct sk_buff *skb, u64 pbc, u8 plen);
/* hfi1_pportdata, points to array of (physical) port-specific
* data structs, indexed by pidx (0..n-1)
*/
......@@ -1170,6 +1192,9 @@ struct hfi1_devdata {
struct rhashtable *sdma_rht;
struct kobject kobj;
/* vnic data */
struct hfi1_vnic_data vnic;
};
/* 8051 firmware version helper */
......
/*
* Copyright(c) 2015, 2016 Intel Corporation.
* Copyright(c) 2015-2017 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.
......@@ -65,6 +65,7 @@
#include "verbs.h"
#include "aspm.h"
#include "affinity.h"
#include "vnic.h"
#undef pr_fmt
#define pr_fmt(fmt) DRIVER_NAME ": " fmt
......@@ -1498,6 +1499,9 @@ static int init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
/* do the generic initialization */
initfail = hfi1_init(dd, 0);
/* setup vnic */
hfi1_vnic_setup(dd);
ret = hfi1_register_ib_device(dd);
/*
......@@ -1575,6 +1579,9 @@ static void remove_one(struct pci_dev *pdev)
/* unregister from IB core */
hfi1_unregister_ib_device(dd);
/* cleanup vnic */
hfi1_vnic_cleanup(dd);
/*
* Disable the IB link, disable interrupts on the device,
* clear dma engines, etc.
......
#ifndef _HFI1_VNIC_H
#define _HFI1_VNIC_H
/*
* Copyright(c) 2017 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.
*
*/
#include <rdma/opa_vnic.h>
#include "hfi.h"
#define HFI1_VNIC_MAX_TXQ 16
#define HFI1_VNIC_MAX_PAD 12
/* L2 header definitions */
#define HFI1_L2_TYPE_OFFSET 0x7
#define HFI1_L2_TYPE_SHFT 0x5
#define HFI1_L2_TYPE_MASK 0x3
#define HFI1_GET_L2_TYPE(hdr) \
((*((u8 *)(hdr) + HFI1_L2_TYPE_OFFSET) >> HFI1_L2_TYPE_SHFT) & \
HFI1_L2_TYPE_MASK)
/* L4 type definitions */
#define HFI1_L4_TYPE_OFFSET 8
#define HFI1_GET_L4_TYPE(data) \
(*((u8 *)(data) + HFI1_L4_TYPE_OFFSET))
/* L4 header definitions */
#define HFI1_VNIC_L4_HDR_OFFSET OPA_VNIC_L2_HDR_LEN
#define HFI1_VNIC_GET_L4_HDR(data) \
(*((u16 *)((u8 *)(data) + HFI1_VNIC_L4_HDR_OFFSET)))
#define HFI1_VNIC_GET_VESWID(data) \
(HFI1_VNIC_GET_L4_HDR(data) & 0xFFF)
/* Service class */
#define HFI1_VNIC_SC_OFFSET_LOW 6
#define HFI1_VNIC_SC_OFFSET_HI 7
#define HFI1_VNIC_SC_SHIFT 4
#define HFI1_VNIC_MAX_QUEUE 16
/**
* struct hfi1_vnic_rx_queue - HFI1 VNIC receive queue
* @idx: queue index
* @vinfo: pointer to vport information
* @netdev: network device
* @napi: netdev napi structure
* @skbq: queue of received socket buffers
*/
struct hfi1_vnic_rx_queue {
u8 idx;
struct hfi1_vnic_vport_info *vinfo;
struct net_device *netdev;
struct napi_struct napi;
struct sk_buff_head skbq;
};
/**
* struct hfi1_vnic_vport_info - HFI1 VNIC virtual port information
* @dd: device data pointer
* @netdev: net device pointer
* @flags: state flags
* @lock: vport lock
* @num_tx_q: number of transmit queues
* @num_rx_q: number of receive queues
* @vesw_id: virtual switch id
* @rxq: Array of receive queues
* @stats: per queue stats
*/
struct hfi1_vnic_vport_info {
struct hfi1_devdata *dd;
struct net_device *netdev;
unsigned long flags;
/* Lock used around state updates */
struct mutex lock;
u8 num_tx_q;
u8 num_rx_q;
u16 vesw_id;
struct hfi1_vnic_rx_queue rxq[HFI1_NUM_VNIC_CTXT];
struct opa_vnic_stats stats[HFI1_VNIC_MAX_QUEUE];
};
#define v_dbg(format, arg...) \
netdev_dbg(vinfo->netdev, format, ## arg)
#define v_err(format, arg...) \
netdev_err(vinfo->netdev, format, ## arg)
#define v_info(format, arg...) \
netdev_info(vinfo->netdev, format, ## arg)
/* vnic hfi1 internal functions */
void hfi1_vnic_setup(struct hfi1_devdata *dd);
void hfi1_vnic_cleanup(struct hfi1_devdata *dd);
void hfi1_vnic_bypass_rcv(struct hfi1_packet *packet);
/* vnic rdma netdev operations */
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 *));
void hfi1_vnic_free_rn(struct net_device *netdev);
#endif /* _HFI1_VNIC_H */
/*
* Copyright(c) 2017 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);
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);
}
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,
void *accel_priv,
select_queue_fallback_t fallback)
{
return 0;
}
/* 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_GET_L4_TYPE(packet->ebuf);
if (likely(l4_type == OPA_VNIC_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);
/* 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 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,
};
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;
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->chip_sdma_engines, HFI1_NUM_VNIC_CTXT);
if (!netdev)
return ERR_PTR(-ENOMEM);
rn = netdev_priv(netdev);
vinfo = opa_vnic_dev_priv(netdev);
vinfo->dd = dd;
vinfo->num_tx_q = dd->chip_sdma_engines;
vinfo->num_rx_q = HFI1_NUM_VNIC_CTXT;
vinfo->netdev = netdev;
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);
}
return netdev;
}
void hfi1_vnic_free_rn(struct net_device *netdev)
{
struct hfi1_vnic_vport_info *vinfo = opa_vnic_dev_priv(netdev);
mutex_destroy(&vinfo->lock);
free_netdev(netdev);
}
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