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qede: Add driver support for PTP

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This patch adds the driver support for,
  - Registering the ptp clock functionality with the OS.
  - Timestamping the Rx/Tx PTP packets.
  - Ethtool callbacks related to PTP.

Signed-off-by: Sudarsana Reddy Kalluru <Sudarsana.Kalluru@cavium.com>
Signed-off-by: Yuval Mintz <Yuval.Mintz@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Sudarsana Reddy Kalluru 2017-02-15 10:24:11 +02:00 committed by David S. Miller
parent c78c70fa30
commit 4c55215c05
8 changed files with 661 additions and 1 deletions
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1
drivers/net/ethernet/qlogic/Kconfig
View File

@ -104,6 +104,7 @@ config QED_SRIOV
config QEDE
tristate "QLogic QED 25/40/100Gb Ethernet NIC"
depends on QED
imply PTP_1588_CLOCK
---help---
This enables the support for ...

2
drivers/net/ethernet/qlogic/qede/Makefile
View File

@ -1,5 +1,5 @@
obj-$(CONFIG_QEDE) := qede.o
qede-y := qede_main.o qede_fp.o qede_filter.o qede_ethtool.o
qede-y := qede_main.o qede_fp.o qede_filter.o qede_ethtool.o qede_ptp.o
qede-$(CONFIG_DCB) += qede_dcbnl.o
qede-$(CONFIG_QED_RDMA) += qede_roce.o

4
drivers/net/ethernet/qlogic/qede/qede.h
View File

@ -137,6 +137,8 @@ struct qede_rdma_dev {
struct workqueue_struct *roce_wq;
};
struct qede_ptp;
struct qede_dev {
struct qed_dev *cdev;
struct net_device *ndev;
@ -148,8 +150,10 @@ struct qede_dev {
u32 flags;
#define QEDE_FLAG_IS_VF BIT(0)
#define IS_VF(edev) (!!((edev)->flags & QEDE_FLAG_IS_VF))
#define QEDE_TX_TIMESTAMPING_EN BIT(1)
const struct qed_eth_ops *ops;
struct qede_ptp *ptp;
struct qed_dev_eth_info dev_info;
#define QEDE_MAX_RSS_CNT(edev) ((edev)->dev_info.num_queues)

10
drivers/net/ethernet/qlogic/qede/qede_ethtool.c
View File

@ -39,6 +39,7 @@
#include <linux/capability.h>
#include <linux/vmalloc.h>
#include "qede.h"
#include "qede_ptp.h"
#define QEDE_RQSTAT_OFFSET(stat_name) \
(offsetof(struct qede_rx_queue, stat_name))
@ -940,6 +941,14 @@ static int qede_set_channels(struct net_device *dev,
return 0;
}
static int qede_get_ts_info(struct net_device *dev,
struct ethtool_ts_info *info)
{
struct qede_dev *edev = netdev_priv(dev);
return qede_ptp_get_ts_info(edev, info);
}
static int qede_set_phys_id(struct net_device *dev,
enum ethtool_phys_id_state state)
{
@ -1586,6 +1595,7 @@ static const struct ethtool_ops qede_ethtool_ops = {
.get_rxfh_key_size = qede_get_rxfh_key_size,
.get_rxfh = qede_get_rxfh,
.set_rxfh = qede_set_rxfh,
.get_ts_info = qede_get_ts_info,
.get_channels = qede_get_channels,
.set_channels = qede_set_channels,
.self_test = qede_self_test,

5
drivers/net/ethernet/qlogic/qede/qede_fp.c
View File

@ -40,6 +40,7 @@
#include <linux/if_ether.h>
#include <linux/if_vlan.h>
#include <net/ip6_checksum.h>
#include "qede_ptp.h"
#include <linux/qed/qed_if.h>
#include "qede.h"
@ -1277,6 +1278,7 @@ static int qede_rx_process_cqe(struct qede_dev *edev,
qede_get_rxhash(skb, fp_cqe->bitfields, fp_cqe->rss_hash);
qede_set_skb_csum(skb, csum_flag);
skb_record_rx_queue(skb, rxq->rxq_id);
qede_ptp_record_rx_ts(edev, cqe, skb);
/* SKB is prepared - pass it to stack */
qede_skb_receive(edev, fp, rxq, skb, le16_to_cpu(fp_cqe->vlan_tag));
@ -1451,6 +1453,9 @@ netdev_tx_t qede_start_xmit(struct sk_buff *skb, struct net_device *ndev)
first_bd->data.bd_flags.bitfields =
1 << ETH_TX_1ST_BD_FLAGS_START_BD_SHIFT;
if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP))
qede_ptp_tx_ts(edev, skb);
/* Map skb linear data for DMA and set in the first BD */
mapping = dma_map_single(txq->dev, skb->data,
skb_headlen(skb), DMA_TO_DEVICE);

39
drivers/net/ethernet/qlogic/qede/qede_main.c
View File

@ -62,6 +62,7 @@
#include <linux/vmalloc.h>
#include <linux/qed/qede_roce.h>
#include "qede.h"
#include "qede_ptp.h"
static char version[] =
"QLogic FastLinQ 4xxxx Ethernet Driver qede " DRV_MODULE_VERSION "\n";
@ -484,6 +485,25 @@ static int qede_set_vf_trust(struct net_device *dev, int vfidx, bool setting)
}
#endif
static int qede_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
{
struct qede_dev *edev = netdev_priv(dev);
if (!netif_running(dev))
return -EAGAIN;
switch (cmd) {
case SIOCSHWTSTAMP:
return qede_ptp_hw_ts(edev, ifr);
default:
DP_VERBOSE(edev, QED_MSG_DEBUG,
"default IOCTL cmd 0x%x\n", cmd);
return -EOPNOTSUPP;
}
return 0;
}
static const struct net_device_ops qede_netdev_ops = {
.ndo_open = qede_open,
.ndo_stop = qede_close,
@ -492,6 +512,7 @@ static const struct net_device_ops qede_netdev_ops = {
.ndo_set_mac_address = qede_set_mac_addr,
.ndo_validate_addr = eth_validate_addr,
.ndo_change_mtu = qede_change_mtu,
.ndo_do_ioctl = qede_ioctl,
#ifdef CONFIG_QED_SRIOV
.ndo_set_vf_mac = qede_set_vf_mac,
.ndo_set_vf_vlan = qede_set_vf_vlan,
@ -841,6 +862,15 @@ static int __qede_probe(struct pci_dev *pdev, u32 dp_module, u8 dp_level,
edev->ops->common->set_id(cdev, edev->ndev->name, DRV_MODULE_VERSION);
/* PTP not supported on VFs */
if (!is_vf) {
rc = qede_ptp_register_phc(edev);
if (rc) {
DP_NOTICE(edev, "Cannot register PHC\n");
goto err5;
}
}
edev->ops->register_ops(cdev, &qede_ll_ops, edev);
#ifdef CONFIG_DCB
@ -856,6 +886,8 @@ static int __qede_probe(struct pci_dev *pdev, u32 dp_module, u8 dp_level,
return 0;
err5:
unregister_netdev(edev->ndev);
err4:
qede_roce_dev_remove(edev);
err3:
@ -907,6 +939,8 @@ static void __qede_remove(struct pci_dev *pdev, enum qede_remove_mode mode)
unregister_netdev(ndev);
qede_ptp_remove(edev);
qede_roce_dev_remove(edev);
edev->ops->common->set_power_state(cdev, PCI_D0);
@ -1660,6 +1694,7 @@ static int qede_start_queues(struct qede_dev *edev, bool clear_stats)
if (!vport_update_params)
return -ENOMEM;
start.handle_ptp_pkts = !!(edev->ptp);
start.gro_enable = !edev->gro_disable;
start.mtu = edev->ndev->mtu;
start.vport_id = 0;
@ -1781,6 +1816,8 @@ static void qede_unload(struct qede_dev *edev, enum qede_unload_mode mode,
qede_roce_dev_event_close(edev);
edev->state = QEDE_STATE_CLOSED;
qede_ptp_stop(edev);
/* Close OS Tx */
netif_tx_disable(edev->ndev);
netif_carrier_off(edev->ndev);
@ -1882,6 +1919,8 @@ static int qede_load(struct qede_dev *edev, enum qede_load_mode mode,
qede_roce_dev_event_open(edev);
qede_link_update(edev, &link_output);
qede_ptp_start(edev, (mode == QEDE_LOAD_NORMAL));
edev->state = QEDE_STATE_OPEN;
DP_INFO(edev, "Ending successfully qede load\n");

536
drivers/net/ethernet/qlogic/qede/qede_ptp.c Normal file
View File

@ -0,0 +1,536 @@
/* QLogic qede NIC Driver
* Copyright (c) 2015-2017 QLogic Corporation
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* 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.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include "qede_ptp.h"
struct qede_ptp {
const struct qed_eth_ptp_ops *ops;
struct ptp_clock_info clock_info;
struct cyclecounter cc;
struct timecounter tc;
struct ptp_clock *clock;
struct work_struct work;
struct qede_dev *edev;
struct sk_buff *tx_skb;
/* ptp spinlock is used for protecting the cycle/time counter fields
* and, also for serializing the qed PTP API invocations.
*/
spinlock_t lock;
bool hw_ts_ioctl_called;
u16 tx_type;
u16 rx_filter;
};
/**
* qede_ptp_adjfreq
* @ptp: the ptp clock structure
* @ppb: parts per billion adjustment from base
*
* Adjust the frequency of the ptp cycle counter by the
* indicated ppb from the base frequency.
*/
static int qede_ptp_adjfreq(struct ptp_clock_info *info, s32 ppb)
{
struct qede_ptp *ptp = container_of(info, struct qede_ptp, clock_info);
struct qede_dev *edev = ptp->edev;
int rc;
__qede_lock(edev);
if (edev->state == QEDE_STATE_OPEN) {
spin_lock_bh(&ptp->lock);
rc = ptp->ops->adjfreq(edev->cdev, ppb);
spin_unlock_bh(&ptp->lock);
} else {
DP_ERR(edev, "PTP adjfreq called while interface is down\n");
rc = -EFAULT;
}
__qede_unlock(edev);
return rc;
}
static int qede_ptp_adjtime(struct ptp_clock_info *info, s64 delta)
{
struct qede_dev *edev;
struct qede_ptp *ptp;
ptp = container_of(info, struct qede_ptp, clock_info);
edev = ptp->edev;
DP_VERBOSE(edev, QED_MSG_DEBUG, "PTP adjtime called, delta = %llx\n",
delta);
spin_lock_bh(&ptp->lock);
timecounter_adjtime(&ptp->tc, delta);
spin_unlock_bh(&ptp->lock);
return 0;
}
static int qede_ptp_gettime(struct ptp_clock_info *info, struct timespec64 *ts)
{
struct qede_dev *edev;
struct qede_ptp *ptp;
u64 ns;
ptp = container_of(info, struct qede_ptp, clock_info);
edev = ptp->edev;
spin_lock_bh(&ptp->lock);
ns = timecounter_read(&ptp->tc);
spin_unlock_bh(&ptp->lock);
DP_VERBOSE(edev, QED_MSG_DEBUG, "PTP gettime called, ns = %llu\n", ns);
*ts = ns_to_timespec64(ns);
return 0;
}
static int qede_ptp_settime(struct ptp_clock_info *info,
const struct timespec64 *ts)
{
struct qede_dev *edev;
struct qede_ptp *ptp;
u64 ns;
ptp = container_of(info, struct qede_ptp, clock_info);
edev = ptp->edev;
ns = timespec64_to_ns(ts);
DP_VERBOSE(edev, QED_MSG_DEBUG, "PTP settime called, ns = %llu\n", ns);
/* Re-init the timecounter */
spin_lock_bh(&ptp->lock);
timecounter_init(&ptp->tc, &ptp->cc, ns);
spin_unlock_bh(&ptp->lock);
return 0;
}
/* Enable (or disable) ancillary features of the phc subsystem */
static int qede_ptp_ancillary_feature_enable(struct ptp_clock_info *info,
struct ptp_clock_request *rq,
int on)
{
struct qede_dev *edev;
struct qede_ptp *ptp;
ptp = container_of(info, struct qede_ptp, clock_info);
edev = ptp->edev;
DP_ERR(edev, "PHC ancillary features are not supported\n");
return -ENOTSUPP;
}
static void qede_ptp_task(struct work_struct *work)
{
struct skb_shared_hwtstamps shhwtstamps;
struct qede_dev *edev;
struct qede_ptp *ptp;
u64 timestamp, ns;
int rc;
ptp = container_of(work, struct qede_ptp, work);
edev = ptp->edev;
/* Read Tx timestamp registers */
spin_lock_bh(&ptp->lock);
rc = ptp->ops->read_tx_ts(edev->cdev, &timestamp);
spin_unlock_bh(&ptp->lock);
if (rc) {
/* Reschedule to keep checking for a valid timestamp value */
schedule_work(&ptp->work);
return;
}
ns = timecounter_cyc2time(&ptp->tc, timestamp);
memset(&shhwtstamps, 0, sizeof(shhwtstamps));
shhwtstamps.hwtstamp = ns_to_ktime(ns);
skb_tstamp_tx(ptp->tx_skb, &shhwtstamps);
dev_kfree_skb_any(ptp->tx_skb);
ptp->tx_skb = NULL;
DP_VERBOSE(edev, QED_MSG_DEBUG,
"Tx timestamp, timestamp cycles = %llu, ns = %llu\n",
timestamp, ns);
}
/* Read the PHC. This API is invoked with ptp_lock held. */
static u64 qede_ptp_read_cc(const struct cyclecounter *cc)
{
struct qede_dev *edev;
struct qede_ptp *ptp;
u64 phc_cycles;
int rc;
ptp = container_of(cc, struct qede_ptp, cc);
edev = ptp->edev;
rc = ptp->ops->read_cc(edev->cdev, &phc_cycles);
if (rc)
WARN_ONCE(1, "PHC read err %d\n", rc);
DP_VERBOSE(edev, QED_MSG_DEBUG, "PHC read cycles = %llu\n", phc_cycles);
return phc_cycles;
}
static void qede_ptp_init_cc(struct qede_dev *edev)
{
struct qede_ptp *ptp;
ptp = edev->ptp;
if (!ptp)
return;
memset(&ptp->cc, 0, sizeof(ptp->cc));
ptp->cc.read = qede_ptp_read_cc;
ptp->cc.mask = CYCLECOUNTER_MASK(64);
ptp->cc.shift = 0;
ptp->cc.mult = 1;
}
static int qede_ptp_cfg_filters(struct qede_dev *edev)
{
struct qede_ptp *ptp = edev->ptp;
if (!ptp)
return -EIO;
if (!ptp->hw_ts_ioctl_called) {
DP_INFO(edev, "TS IOCTL not called\n");
return 0;
}
switch (ptp->tx_type) {
case HWTSTAMP_TX_ON:
edev->flags |= QEDE_TX_TIMESTAMPING_EN;
ptp->ops->hwtstamp_tx_on(edev->cdev);
break;
case HWTSTAMP_TX_ONESTEP_SYNC:
DP_ERR(edev, "One-step timestamping is not supported\n");
return -ERANGE;
}
spin_lock_bh(&ptp->lock);
switch (ptp->rx_filter) {
case HWTSTAMP_FILTER_NONE:
break;
case HWTSTAMP_FILTER_ALL:
case HWTSTAMP_FILTER_SOME:
ptp->rx_filter = HWTSTAMP_FILTER_NONE;
break;
case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
ptp->rx_filter = HWTSTAMP_FILTER_PTP_V1_L4_EVENT;
/* Initialize PTP detection for UDP/IPv4 events */
ptp->ops->cfg_rx_filters(edev->cdev, QED_PTP_FILTER_IPV4);
break;
case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
ptp->rx_filter = HWTSTAMP_FILTER_PTP_V2_L4_EVENT;
/* Initialize PTP detection for UDP/IPv4 or UDP/IPv6 events */
ptp->ops->cfg_rx_filters(edev->cdev, QED_PTP_FILTER_IPV4_IPV6);
break;
case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
ptp->rx_filter = HWTSTAMP_FILTER_PTP_V2_L2_EVENT;
/* Initialize PTP detection L2 events */
ptp->ops->cfg_rx_filters(edev->cdev, QED_PTP_FILTER_L2);
break;
case HWTSTAMP_FILTER_PTP_V2_EVENT:
case HWTSTAMP_FILTER_PTP_V2_SYNC:
case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
ptp->rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT;
/* Initialize PTP detection L2, UDP/IPv4 or UDP/IPv6 events */
ptp->ops->cfg_rx_filters(edev->cdev,
QED_PTP_FILTER_L2_IPV4_IPV6);
break;
}
spin_unlock_bh(&ptp->lock);
return 0;
}
int qede_ptp_hw_ts(struct qede_dev *edev, struct ifreq *ifr)
{
struct hwtstamp_config config;
struct qede_ptp *ptp;
int rc;
ptp = edev->ptp;
if (!ptp)
return -EIO;
if (copy_from_user(&config, ifr->ifr_data, sizeof(config)))
return -EFAULT;
DP_VERBOSE(edev, QED_MSG_DEBUG,
"HWTSTAMP IOCTL: Requested tx_type = %d, requested rx_filters = %d\n",
config.tx_type, config.rx_filter);
if (config.flags) {
DP_ERR(edev, "config.flags is reserved for future use\n");
return -EINVAL;
}
ptp->hw_ts_ioctl_called = 1;
ptp->tx_type = config.tx_type;
ptp->rx_filter = config.rx_filter;
rc = qede_ptp_cfg_filters(edev);
if (rc)
return rc;
config.rx_filter = ptp->rx_filter;
return copy_to_user(ifr->ifr_data, &config,
sizeof(config)) ? -EFAULT : 0;
}
/* Called during load, to initialize PTP-related stuff */
static void qede_ptp_init(struct qede_dev *edev, bool init_tc)
{
struct qede_ptp *ptp;
int rc;
ptp = edev->ptp;
if (!ptp)
return;
spin_lock_init(&ptp->lock);
/* Configure PTP in HW */
rc = ptp->ops->enable(edev->cdev);
if (rc) {
DP_ERR(edev, "Stopping PTP initialization\n");
return;
}
/* Init work queue for Tx timestamping */
INIT_WORK(&ptp->work, qede_ptp_task);
/* Init cyclecounter and timecounter. This is done only in the first
* load. If done in every load, PTP application will fail when doing
* unload / load (e.g. MTU change) while it is running.
*/
if (init_tc) {
qede_ptp_init_cc(edev);
timecounter_init(&ptp->tc, &ptp->cc,
ktime_to_ns(ktime_get_real()));
}
DP_VERBOSE(edev, QED_MSG_DEBUG, "PTP initialization is successful\n");
}
void qede_ptp_start(struct qede_dev *edev, bool init_tc)
{
qede_ptp_init(edev, init_tc);
qede_ptp_cfg_filters(edev);
}
void qede_ptp_remove(struct qede_dev *edev)
{
struct qede_ptp *ptp;
ptp = edev->ptp;
if (ptp && ptp->clock) {
ptp_clock_unregister(ptp->clock);
ptp->clock = NULL;
}
kfree(ptp);
edev->ptp = NULL;
}
int qede_ptp_get_ts_info(struct qede_dev *edev, struct ethtool_ts_info *info)
{
struct qede_ptp *ptp = edev->ptp;
if (!ptp)
return -EIO;
info->so_timestamping = SOF_TIMESTAMPING_TX_SOFTWARE |
SOF_TIMESTAMPING_RX_SOFTWARE |
SOF_TIMESTAMPING_SOFTWARE |
SOF_TIMESTAMPING_TX_HARDWARE |
SOF_TIMESTAMPING_RX_HARDWARE |
SOF_TIMESTAMPING_RAW_HARDWARE;
if (ptp->clock)
info->phc_index = ptp_clock_index(ptp->clock);
else
info->phc_index = -1;
info->rx_filters = BIT(HWTSTAMP_FILTER_NONE) |
BIT(HWTSTAMP_FILTER_PTP_V1_L4_EVENT) |
BIT(HWTSTAMP_FILTER_PTP_V1_L4_SYNC) |
BIT(HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ) |
BIT(HWTSTAMP_FILTER_PTP_V2_L4_EVENT) |
BIT(HWTSTAMP_FILTER_PTP_V2_L4_SYNC) |
BIT(HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ) |
BIT(HWTSTAMP_FILTER_PTP_V2_L2_EVENT) |
BIT(HWTSTAMP_FILTER_PTP_V2_L2_SYNC) |
BIT(HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ) |
BIT(HWTSTAMP_FILTER_PTP_V2_EVENT) |
BIT(HWTSTAMP_FILTER_PTP_V2_SYNC) |
BIT(HWTSTAMP_FILTER_PTP_V2_DELAY_REQ);
info->tx_types = BIT(HWTSTAMP_TX_OFF) | BIT(HWTSTAMP_TX_ON);
return 0;
}
/* Called during unload, to stop PTP-related stuff */
void qede_ptp_stop(struct qede_dev *edev)
{
struct qede_ptp *ptp;
ptp = edev->ptp;
if (!ptp)
return;
/* Cancel PTP work queue. Should be done after the Tx queues are
* drained to prevent additional scheduling.
*/
cancel_work_sync(&ptp->work);
if (ptp->tx_skb) {
dev_kfree_skb_any(ptp->tx_skb);
ptp->tx_skb = NULL;
}
/* Disable PTP in HW */
spin_lock_bh(&ptp->lock);
ptp->ops->disable(edev->cdev);
spin_unlock_bh(&ptp->lock);
}
int qede_ptp_register_phc(struct qede_dev *edev)
{
struct qede_ptp *ptp;
ptp = kzalloc(sizeof(*ptp), GFP_KERNEL);
if (!ptp) {
DP_INFO(edev, "Failed to allocate struct for PTP\n");
return -ENOMEM;
}
ptp->edev = edev;
ptp->ops = edev->ops->ptp;
if (!ptp->ops) {
kfree(ptp);
edev->ptp = NULL;
DP_ERR(edev, "PTP clock registeration failed\n");
return -EIO;
}
edev->ptp = ptp;
/* Fill the ptp_clock_info struct and register PTP clock */
ptp->clock_info.owner = THIS_MODULE;
snprintf(ptp->clock_info.name, 16, "%s", edev->ndev->name);
ptp->clock_info.max_adj = QED_MAX_PHC_DRIFT_PPB;
ptp->clock_info.n_alarm = 0;
ptp->clock_info.n_ext_ts = 0;
ptp->clock_info.n_per_out = 0;
ptp->clock_info.pps = 0;
ptp->clock_info.adjfreq = qede_ptp_adjfreq;
ptp->clock_info.adjtime = qede_ptp_adjtime;
ptp->clock_info.gettime64 = qede_ptp_gettime;
ptp->clock_info.settime64 = qede_ptp_settime;
ptp->clock_info.enable = qede_ptp_ancillary_feature_enable;
ptp->clock = ptp_clock_register(&ptp->clock_info, &edev->pdev->dev);
if (IS_ERR(ptp->clock)) {
ptp->clock = NULL;
kfree(ptp);
edev->ptp = NULL;
DP_ERR(edev, "PTP clock registeration failed\n");
}
return 0;
}
void qede_ptp_tx_ts(struct qede_dev *edev, struct sk_buff *skb)
{
struct qede_ptp *ptp;
ptp = edev->ptp;
if (!ptp)
return;
if (unlikely(!(edev->flags & QEDE_TX_TIMESTAMPING_EN))) {
DP_NOTICE(edev,
"Tx timestamping was not enabled, this packet will not be timestamped\n");
} else if (unlikely(ptp->tx_skb)) {
DP_NOTICE(edev,
"The device supports only a single outstanding packet to timestamp, this packet will not be timestamped\n");
} else {
skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
/* schedule check for Tx timestamp */
ptp->tx_skb = skb_get(skb);
schedule_work(&ptp->work);
}
}
void qede_ptp_rx_ts(struct qede_dev *edev, struct sk_buff *skb)
{
struct qede_ptp *ptp;
u64 timestamp, ns;
int rc;
ptp = edev->ptp;
if (!ptp)
return;
spin_lock_bh(&ptp->lock);
rc = ptp->ops->read_rx_ts(edev->cdev, &timestamp);
if (rc) {
spin_unlock_bh(&ptp->lock);
DP_INFO(edev, "Invalid Rx timestamp\n");
return;
}
ns = timecounter_cyc2time(&ptp->tc, timestamp);
spin_unlock_bh(&ptp->lock);
skb_hwtstamps(skb)->hwtstamp = ns_to_ktime(ns);
DP_VERBOSE(edev, QED_MSG_DEBUG,
"Rx timestamp, timestamp cycles = %llu, ns = %llu\n",
timestamp, ns);
}

65
drivers/net/ethernet/qlogic/qede/qede_ptp.h Normal file
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/* QLogic qede NIC Driver
* Copyright (c) 2015-2017 QLogic Corporation
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* 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.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifndef _QEDE_PTP_H_
#define _QEDE_PTP_H_
#include <linux/ptp_clock_kernel.h>
#include <linux/net_tstamp.h>
#include <linux/timecounter.h>
#include "qede.h"
void qede_ptp_rx_ts(struct qede_dev *edev, struct sk_buff *skb);
void qede_ptp_tx_ts(struct qede_dev *edev, struct sk_buff *skb);
int qede_ptp_hw_ts(struct qede_dev *edev, struct ifreq *req);
void qede_ptp_start(struct qede_dev *edev, bool init_tc);
void qede_ptp_stop(struct qede_dev *edev);
void qede_ptp_remove(struct qede_dev *edev);
int qede_ptp_register_phc(struct qede_dev *edev);
int qede_ptp_get_ts_info(struct qede_dev *edev, struct ethtool_ts_info *ts);
static inline void qede_ptp_record_rx_ts(struct qede_dev *edev,
union eth_rx_cqe *cqe,
struct sk_buff *skb)
{
/* Check if this packet was timestamped */
if (unlikely(le16_to_cpu(cqe->fast_path_regular.pars_flags.flags) &
(1 << PARSING_AND_ERR_FLAGS_TIMESTAMPRECORDED_SHIFT))) {
if (likely(le16_to_cpu(cqe->fast_path_regular.pars_flags.flags)
& (1 << PARSING_AND_ERR_FLAGS_TIMESYNCPKT_SHIFT))) {
qede_ptp_rx_ts(edev, skb);
} else {
DP_INFO(edev,
"Timestamp recorded for non PTP packets\n");
}
}
}
#endif /* _QEDE_PTP_H_ */