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e1000e: add support for IEEE-1588 PTP 

Add PTP IEEE-1588 support and make accesible via the PHC subsystem.

v2: make e1000e_ptp_clock_info a static const struct per Stephen Hemminger

Cc: Stephen Hemminger <stephen@networkplumber.org>
Cc: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Reviewed-by: Jacob Keller <Jacob.e.keller@intel.com>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Tested-by: Jeff Pieper <jeffrey.e.pieper@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Bruce Allan 2013-01-19 01:09:58 +00:00 committed by Jeff Kirsher
parent 347b5201cb
commit d89777bf0e
8 changed files with 417 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/net/ethernet/intel/Kconfig
View File

@ -74,6 +74,7 @@ config E1000E
tristate "Intel(R) PRO/1000 PCI-Express Gigabit Ethernet support"
depends on PCI && (!SPARC32 || BROKEN)
select CRC32
select PTP_1588_CLOCK
---help---
This driver supports the PCI-Express Intel(R) PRO/1000 gigabit
ethernet family of adapters. For PCI or PCI-X e1000 adapters,

2
drivers/net/ethernet/intel/e1000e/Makefile
View File

@ -34,5 +34,5 @@ obj-$(CONFIG_E1000E) += e1000e.o
e1000e-objs := 82571.o ich8lan.o 80003es2lan.o \
mac.o manage.o nvm.o phy.o \
param.o ethtool.o netdev.o
param.o ethtool.o netdev.o ptp.o

11
drivers/net/ethernet/intel/e1000e/defines.h
View File

@ -544,9 +544,20 @@
#define E1000_TSYNCRXCTL_VALID 0x00000001 /* Rx timestamp valid */
#define E1000_TSYNCRXCTL_TYPE_MASK 0x0000000E /* Rx type mask */
#define E1000_TSYNCRXCTL_TYPE_L2_V2 0x00
#define E1000_TSYNCRXCTL_TYPE_L4_V1 0x02
#define E1000_TSYNCRXCTL_TYPE_L2_L4_V2 0x04
#define E1000_TSYNCRXCTL_TYPE_ALL 0x08
#define E1000_TSYNCRXCTL_TYPE_EVENT_V2 0x0A
#define E1000_TSYNCRXCTL_ENABLED 0x00000010 /* enable Rx timestamping */
#define E1000_TSYNCRXCTL_SYSCFI 0x00000020 /* Sys clock frequency */
#define E1000_RXMTRL_PTP_V1_SYNC_MESSAGE 0x00000000
#define E1000_RXMTRL_PTP_V1_DELAY_REQ_MESSAGE 0x00010000
#define E1000_RXMTRL_PTP_V2_SYNC_MESSAGE 0x00000000
#define E1000_RXMTRL_PTP_V2_DELAY_REQ_MESSAGE 0x01000000
#define E1000_TIMINCA_INCPERIOD_SHIFT 24
#define E1000_TIMINCA_INCVALUE_MASK 0x00FFFFFF

9
drivers/net/ethernet/intel/e1000e/e1000.h
View File

@ -43,7 +43,8 @@
#include <linux/if_vlan.h>
#include <linux/clocksource.h>
#include <linux/net_tstamp.h>
#include <linux/ptp_clock_kernel.h>
#include <linux/ptp_classify.h>
#include "hw.h"
struct e1000_info;
@ -413,6 +414,8 @@ struct e1000_adapter {
spinlock_t systim_lock; /* protects SYSTIML/H regsters */
struct cyclecounter cc;
struct timecounter tc;
struct ptp_clock *ptp_clock;
struct ptp_clock_info ptp_clock_info;
};
struct e1000_info {
@ -427,6 +430,8 @@ struct e1000_info {
const struct e1000_nvm_operations *nvm_ops;
};
s32 e1000e_get_base_timinca(struct e1000_adapter *adapter, u32 *timinca);
/* The system time is maintained by a 64-bit counter comprised of the 32-bit
* SYSTIMH and SYSTIML registers. How the counter increments (and therefore
* its resolution) is based on the contents of the TIMINCA register - it
@ -704,6 +709,8 @@ extern s32 e1000_phy_force_speed_duplex_ife(struct e1000_hw *hw);
extern s32 e1000_check_polarity_igp(struct e1000_hw *hw);
extern bool e1000_check_phy_82574(struct e1000_hw *hw);
extern s32 e1000_read_emi_reg_locked(struct e1000_hw *hw, u16 addr, u16 *data);
extern void e1000e_ptp_init(struct e1000_adapter *adapter);
extern void e1000e_ptp_remove(struct e1000_adapter *adapter);
static inline s32 e1000_phy_hw_reset(struct e1000_hw *hw)
{

12
drivers/net/ethernet/intel/e1000e/ethtool.c
View File

@ -2209,8 +2209,20 @@ static int e1000e_get_ts_info(struct net_device *netdev,
info->tx_types = (1 << HWTSTAMP_TX_OFF) | (1 << HWTSTAMP_TX_ON);
info->rx_filters = ((1 << HWTSTAMP_FILTER_NONE) |
(1 << HWTSTAMP_FILTER_PTP_V1_L4_SYNC) |
(1 << HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ) |
(1 << HWTSTAMP_FILTER_PTP_V2_L4_SYNC) |
(1 << HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ) |
(1 << HWTSTAMP_FILTER_PTP_V2_L2_SYNC) |
(1 << HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ) |
(1 << HWTSTAMP_FILTER_PTP_V2_EVENT) |
(1 << HWTSTAMP_FILTER_PTP_V2_SYNC) |
(1 << HWTSTAMP_FILTER_PTP_V2_DELAY_REQ) |
(1 << HWTSTAMP_FILTER_ALL));
if (adapter->ptp_clock)
info->phc_index = ptp_clock_index(adapter->ptp_clock);
return 0;
}

2
drivers/net/ethernet/intel/e1000e/hw.h
View File

@ -251,6 +251,8 @@ enum e1e_registers {
E1000_TSYNCRXCTL = 0x0B620, /* Rx Time Sync Control register - RW */
E1000_RXSTMPL = 0x0B624, /* Rx timestamp Low - RO */
E1000_RXSTMPH = 0x0B628, /* Rx timestamp High - RO */
E1000_RXMTRL = 0x0B634, /* Timesync Rx EtherType and Msg Type - RW */
E1000_RXUDP = 0x0B638, /* Timesync Rx UDP Port - RW */
};
#define E1000_MAX_PHY_ADDR 4

107
drivers/net/ethernet/intel/e1000e/netdev.c
View File

@ -3413,7 +3413,7 @@ static void e1000e_setup_rss_hash(struct e1000_adapter *adapter)
* Get attributes for incrementing the System Time Register SYSTIML/H at
* the default base frequency, and set the cyclecounter shift value.
**/
static s32 e1000e_get_base_timinca(struct e1000_adapter *adapter, u32 *timinca)
s32 e1000e_get_base_timinca(struct e1000_adapter *adapter, u32 *timinca)
{
struct e1000_hw *hw = &adapter->hw;
u32 incvalue, incperiod, shift;
@ -3485,6 +3485,10 @@ static int e1000e_config_hwtstamp(struct e1000_adapter *adapter)
struct hwtstamp_config *config = &adapter->hwtstamp_config;
u32 tsync_tx_ctl = E1000_TSYNCTXCTL_ENABLED;
u32 tsync_rx_ctl = E1000_TSYNCRXCTL_ENABLED;
u32 rxmtrl = 0;
u16 rxudp = 0;
bool is_l4 = false;
bool is_l2 = false;
u32 regval;
s32 ret_val;
@ -3509,7 +3513,69 @@ static int e1000e_config_hwtstamp(struct e1000_adapter *adapter)
case HWTSTAMP_FILTER_NONE:
tsync_rx_ctl = 0;
break;
case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L4_V1;
rxmtrl = E1000_RXMTRL_PTP_V1_SYNC_MESSAGE;
is_l4 = true;
break;
case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L4_V1;
rxmtrl = E1000_RXMTRL_PTP_V1_DELAY_REQ_MESSAGE;
is_l4 = true;
break;
case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
/* Also time stamps V2 L2 Path Delay Request/Response */
tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L2_V2;
rxmtrl = E1000_RXMTRL_PTP_V2_SYNC_MESSAGE;
is_l2 = true;
break;
case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
/* Also time stamps V2 L2 Path Delay Request/Response. */
tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L2_V2;
rxmtrl = E1000_RXMTRL_PTP_V2_DELAY_REQ_MESSAGE;
is_l2 = true;
break;
case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
/* Hardware cannot filter just V2 L4 Sync messages;
* fall-through to V2 (both L2 and L4) Sync.
*/
case HWTSTAMP_FILTER_PTP_V2_SYNC:
/* Also time stamps V2 Path Delay Request/Response. */
tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L2_L4_V2;
rxmtrl = E1000_RXMTRL_PTP_V2_SYNC_MESSAGE;
is_l2 = true;
is_l4 = true;
break;
case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
/* Hardware cannot filter just V2 L4 Delay Request messages;
* fall-through to V2 (both L2 and L4) Delay Request.
*/
case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
/* Also time stamps V2 Path Delay Request/Response. */
tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L2_L4_V2;
rxmtrl = E1000_RXMTRL_PTP_V2_DELAY_REQ_MESSAGE;
is_l2 = true;
is_l4 = true;
break;
case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
/* Hardware cannot filter just V2 L4 or L2 Event messages;
* fall-through to all V2 (both L2 and L4) Events.
*/
case HWTSTAMP_FILTER_PTP_V2_EVENT:
tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_EVENT_V2;
config->rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT;
is_l2 = true;
is_l4 = true;
break;
case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
/* For V1, the hardware can only filter Sync messages or
* Delay Request messages but not both so fall-through to
* time stamp all packets.
*/
case HWTSTAMP_FILTER_ALL:
is_l2 = true;
is_l4 = true;
tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_ALL;
config->rx_filter = HWTSTAMP_FILTER_ALL;
break;
@ -3541,6 +3607,22 @@ static int e1000e_config_hwtstamp(struct e1000_adapter *adapter)
return -EAGAIN;
}
/* L2: define ethertype filter for time stamped packets */
if (is_l2)
rxmtrl |= ETH_P_1588;
/* define which PTP packets get time stamped */
ew32(RXMTRL, rxmtrl);
/* Filter by destination port */
if (is_l4) {
rxudp = PTP_EV_PORT;
cpu_to_be16s(&rxudp);
}
ew32(RXUDP, rxudp);
e1e_flush();
/* Clear TSYNCRXCTL_VALID & TSYNCTXCTL_VALID bit */
regval = er32(RXSTMPH);
regval = er32(TXSTMPH);
@ -5665,6 +5747,24 @@ static int e1000e_hwtstamp_ioctl(struct net_device *netdev, struct ifreq *ifr)
config = adapter->hwtstamp_config;
switch (config.rx_filter) {
case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
case HWTSTAMP_FILTER_PTP_V2_SYNC:
case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
/* With V2 type filters which specify a Sync or Delay Request,
* Path Delay Request/Response messages are also time stamped
* by hardware so notify the caller the requested packets plus
* some others are time stamped.
*/
config.rx_filter = HWTSTAMP_FILTER_SOME;
break;
default:
break;
}
return copy_to_user(ifr->ifr_data, &config,
sizeof(config)) ? -EFAULT : 0;
}
@ -6672,6 +6772,9 @@ static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
/* carrier off reporting is important to ethtool even BEFORE open */
netif_carrier_off(netdev);
/* init PTP hardware clock */
e1000e_ptp_init(adapter);
e1000_print_device_info(adapter);
if (pci_dev_run_wake(pdev))
@ -6720,6 +6823,8 @@ static void e1000_remove(struct pci_dev *pdev)
struct e1000_adapter *adapter = netdev_priv(netdev);
bool down = test_bit(__E1000_DOWN, &adapter->state);
e1000e_ptp_remove(adapter);
/* The timers may be rescheduled, so explicitly disable them
* from being rescheduled.
*/

276
drivers/net/ethernet/intel/e1000e/ptp.c Normal file
View File

@ -0,0 +1,276 @@
/*******************************************************************************
Intel PRO/1000 Linux driver
Copyright(c) 1999 - 2012 Intel Corporation.
This program is free software; you can redistribute it and/or modify it
under the terms and conditions of the GNU General Public License,
version 2, as published by the Free Software Foundation.
This program is distributed in the hope 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.
You should have received a copy of the GNU General Public License along with
this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
The full GNU General Public License is included in this distribution in
the file called "COPYING".
Contact Information:
Linux NICS <linux.nics@intel.com>
e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
*******************************************************************************/
/* PTP 1588 Hardware Clock (PHC)
* Derived from PTP Hardware Clock driver for Intel 82576 and 82580 (igb)
* Copyright (C) 2011 Richard Cochran <richardcochran@gmail.com>
*/
#include "e1000.h"
/**
* e1000e_phc_adjfreq - adjust the frequency of the hardware clock
* @ptp: ptp clock structure
* @delta: Desired frequency change in parts per billion
*
* Adjust the frequency of the PHC cycle counter by the indicated delta from
* the base frequency.
**/
static int e1000e_phc_adjfreq(struct ptp_clock_info *ptp, s32 delta)
{
struct e1000_adapter *adapter = container_of(ptp, struct e1000_adapter,
ptp_clock_info);
struct e1000_hw *hw = &adapter->hw;
bool neg_adj = false;
u64 adjustment;
u32 timinca, incvalue;
s32 ret_val;
if ((delta > ptp->max_adj) || (delta <= -1000000000))
return -EINVAL;
if (delta < 0) {
neg_adj = true;
delta = -delta;
}
/* Get the System Time Register SYSTIM base frequency */
ret_val = e1000e_get_base_timinca(adapter, &timinca);
if (ret_val)
return ret_val;
incvalue = timinca & E1000_TIMINCA_INCVALUE_MASK;
adjustment = incvalue;
adjustment *= delta;
adjustment = div_u64(adjustment, 1000000000);
incvalue = neg_adj ? (incvalue - adjustment) : (incvalue + adjustment);
timinca &= ~E1000_TIMINCA_INCVALUE_MASK;
timinca |= incvalue;
ew32(TIMINCA, timinca);
return 0;
}
/**
* e1000e_phc_adjtime - Shift the time of the hardware clock
* @ptp: ptp clock structure
* @delta: Desired change in nanoseconds
*
* Adjust the timer by resetting the timecounter structure.
**/
static int e1000e_phc_adjtime(struct ptp_clock_info *ptp, s64 delta)
{
struct e1000_adapter *adapter = container_of(ptp, struct e1000_adapter,
ptp_clock_info);
unsigned long flags;
s64 now;
spin_lock_irqsave(&adapter->systim_lock, flags);
now = timecounter_read(&adapter->tc);
now += delta;
timecounter_init(&adapter->tc, &adapter->cc, now);
spin_unlock_irqrestore(&adapter->systim_lock, flags);
return 0;
}
/**
* e1000e_phc_gettime - Reads the current time from the hardware clock
* @ptp: ptp clock structure
* @ts: timespec structure to hold the current time value
*
* Read the timecounter and return the correct value in ns after converting
* it into a struct timespec.
**/
static int e1000e_phc_gettime(struct ptp_clock_info *ptp, struct timespec *ts)
{
struct e1000_adapter *adapter = container_of(ptp, struct e1000_adapter,
ptp_clock_info);
unsigned long flags;
u32 remainder;
u64 ns;
spin_lock_irqsave(&adapter->systim_lock, flags);
ns = timecounter_read(&adapter->tc);
spin_unlock_irqrestore(&adapter->systim_lock, flags);
ts->tv_sec = div_u64_rem(ns, NSEC_PER_SEC, &remainder);
ts->tv_nsec = remainder;
return 0;
}
/**
* e1000e_phc_settime - Set the current time on the hardware clock
* @ptp: ptp clock structure
* @ts: timespec containing the new time for the cycle counter
*
* Reset the timecounter to use a new base value instead of the kernel
* wall timer value.
**/
static int e1000e_phc_settime(struct ptp_clock_info *ptp,
const struct timespec *ts)
{
struct e1000_adapter *adapter = container_of(ptp, struct e1000_adapter,
ptp_clock_info);
unsigned long flags;
u64 ns;
ns = ts->tv_sec * NSEC_PER_SEC;
ns += ts->tv_nsec;
/* reset the timecounter */
spin_lock_irqsave(&adapter->systim_lock, flags);
timecounter_init(&adapter->tc, &adapter->cc, ns);
spin_unlock_irqrestore(&adapter->systim_lock, flags);
return 0;
}
/**
* e1000e_phc_enable - enable or disable an ancillary feature
* @ptp: ptp clock structure
* @request: Desired resource to enable or disable
* @on: Caller passes one to enable or zero to disable
*
* Enable (or disable) ancillary features of the PHC subsystem.
* Currently, no ancillary features are supported.
**/
static int e1000e_phc_enable(struct ptp_clock_info *ptp,
struct ptp_clock_request *request, int on)
{
return -EOPNOTSUPP;
}
static void e1000e_systim_overflow_work(struct work_struct *work)
{
struct e1000_adapter *adapter = container_of(work, struct e1000_adapter,
systim_overflow_work.work);
struct e1000_hw *hw = &adapter->hw;
struct timespec ts;
adapter->ptp_clock_info.gettime(&adapter->ptp_clock_info, &ts);
e_dbg("SYSTIM overflow check at %ld.%09lu\n", ts.tv_sec, ts.tv_nsec);
schedule_delayed_work(&adapter->systim_overflow_work,
E1000_SYSTIM_OVERFLOW_PERIOD);
}
static const struct ptp_clock_info e1000e_ptp_clock_info = {
.owner = THIS_MODULE,
.n_alarm = 0,
.n_ext_ts = 0,
.n_per_out = 0,
.pps = 0,
.adjfreq = e1000e_phc_adjfreq,
.adjtime = e1000e_phc_adjtime,
.gettime = e1000e_phc_gettime,
.settime = e1000e_phc_settime,
.enable = e1000e_phc_enable,
};
/**
* e1000e_ptp_init - initialize PTP for devices which support it
* @adapter: board private structure
*
* This function performs the required steps for enabling PTP support.
* If PTP support has already been loaded it simply calls the cyclecounter
* init routine and exits.
**/
void e1000e_ptp_init(struct e1000_adapter *adapter)
{
struct e1000_hw *hw = &adapter->hw;
adapter->ptp_clock = NULL;
if (!(adapter->flags & FLAG_HAS_HW_TIMESTAMP))
return;
adapter->ptp_clock_info = e1000e_ptp_clock_info;
snprintf(adapter->ptp_clock_info.name,
sizeof(adapter->ptp_clock_info.name), "%pm",
adapter->netdev->perm_addr);
switch (hw->mac.type) {
case e1000_pch2lan:
case e1000_pch_lpt:
if ((hw->mac.type != e1000_pch_lpt) ||
(er32(TSYNCRXCTL) & E1000_TSYNCRXCTL_SYSCFI)) {
adapter->ptp_clock_info.max_adj = 24000000 - 1;
break;
}
/* fall-through */
case e1000_82574:
case e1000_82583:
adapter->ptp_clock_info.max_adj = 600000000 - 1;
break;
default:
break;
}
INIT_DELAYED_WORK(&adapter->systim_overflow_work,
e1000e_systim_overflow_work);
schedule_delayed_work(&adapter->systim_overflow_work,
E1000_SYSTIM_OVERFLOW_PERIOD);
adapter->ptp_clock = ptp_clock_register(&adapter->ptp_clock_info,
&adapter->pdev->dev);
if (IS_ERR(adapter->ptp_clock)) {
adapter->ptp_clock = NULL;
e_err("ptp_clock_register failed\n");
} else {
e_info("registered PHC clock\n");
}
}
/**
* e1000e_ptp_remove - disable PTP device and stop the overflow check
* @adapter: board private structure
*
* Stop the PTP support, and cancel the delayed work.
**/
void e1000e_ptp_remove(struct e1000_adapter *adapter)
{
if (!(adapter->flags & FLAG_HAS_HW_TIMESTAMP))
return;
cancel_delayed_work_sync(&adapter->systim_overflow_work);
if (adapter->ptp_clock) {
ptp_clock_unregister(adapter->ptp_clock);
adapter->ptp_clock = NULL;
e_info("removed PHC\n");
}
}