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path: root/drivers/net/ethernet/intel/igb/igb_ptp.c
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Diffstat (limited to 'drivers/net/ethernet/intel/igb/igb_ptp.c')
-rw-r--r--drivers/net/ethernet/intel/igb/igb_ptp.c238
1 files changed, 164 insertions, 74 deletions
diff --git a/drivers/net/ethernet/intel/igb/igb_ptp.c b/drivers/net/ethernet/intel/igb/igb_ptp.c
index ab3429729bd..794c139f0cc 100644
--- a/drivers/net/ethernet/intel/igb/igb_ptp.c
+++ b/drivers/net/ethernet/intel/igb/igb_ptp.c
@@ -1,5 +1,4 @@
-/*
- * PTP Hardware Clock (PHC) driver for the Intel 82576 and 82580
+/* PTP Hardware Clock (PHC) driver for the Intel 82576 and 82580
*
* Copyright (C) 2011 Richard Cochran <richardcochran@gmail.com>
*
@@ -13,21 +12,20 @@
* 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 Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include <linux/module.h>
#include <linux/device.h>
#include <linux/pci.h>
+#include <linux/ptp_classify.h>
#include "igb.h"
#define INCVALUE_MASK 0x7fffffff
#define ISGN 0x80000000
-/*
- * The 82580 timesync updates the system timer every 8ns by 8ns,
+/* The 82580 timesync updates the system timer every 8ns by 8ns,
* and this update value cannot be reprogrammed.
*
* Neither the 82576 nor the 82580 offer registers wide enough to hold
@@ -70,15 +68,15 @@
*/
#define IGB_SYSTIM_OVERFLOW_PERIOD (HZ * 60 * 9)
+#define IGB_PTP_TX_TIMEOUT (HZ * 15)
#define INCPERIOD_82576 (1 << E1000_TIMINCA_16NS_SHIFT)
#define INCVALUE_82576_MASK ((1 << E1000_TIMINCA_16NS_SHIFT) - 1)
#define INCVALUE_82576 (16 << IGB_82576_TSYNC_SHIFT)
#define IGB_NBITS_82580 40
-/*
- * SYSTIM read access for the 82576
- */
+static void igb_ptp_tx_hwtstamp(struct igb_adapter *adapter);
+/* SYSTIM read access for the 82576 */
static cycle_t igb_ptp_read_82576(const struct cyclecounter *cc)
{
struct igb_adapter *igb = container_of(cc, struct igb_adapter, cc);
@@ -95,23 +93,19 @@ static cycle_t igb_ptp_read_82576(const struct cyclecounter *cc)
return val;
}
-/*
- * SYSTIM read access for the 82580
- */
-
+/* SYSTIM read access for the 82580 */
static cycle_t igb_ptp_read_82580(const struct cyclecounter *cc)
{
struct igb_adapter *igb = container_of(cc, struct igb_adapter, cc);
struct e1000_hw *hw = &igb->hw;
+ u32 lo, hi;
u64 val;
- u32 lo, hi, jk;
- /*
- * The timestamp latches on lowest register read. For the 82580
+ /* The timestamp latches on lowest register read. For the 82580
* the lowest register is SYSTIMR instead of SYSTIML. However we only
* need to provide nanosecond resolution, so we just ignore it.
*/
- jk = rd32(E1000_SYSTIMR);
+ rd32(E1000_SYSTIMR);
lo = rd32(E1000_SYSTIML);
hi = rd32(E1000_SYSTIMH);
@@ -121,21 +115,17 @@ static cycle_t igb_ptp_read_82580(const struct cyclecounter *cc)
return val;
}
-/*
- * SYSTIM read access for I210/I211
- */
-
+/* SYSTIM read access for I210/I211 */
static void igb_ptp_read_i210(struct igb_adapter *adapter, struct timespec *ts)
{
struct e1000_hw *hw = &adapter->hw;
- u32 sec, nsec, jk;
+ u32 sec, nsec;
- /*
- * The timestamp latches on lowest register read. For I210/I211, the
+ /* The timestamp latches on lowest register read. For I210/I211, the
* lowest register is SYSTIMR. Since we only need to provide nanosecond
* resolution, we can ignore it.
*/
- jk = rd32(E1000_SYSTIMR);
+ rd32(E1000_SYSTIMR);
nsec = rd32(E1000_SYSTIML);
sec = rd32(E1000_SYSTIMH);
@@ -148,8 +138,7 @@ static void igb_ptp_write_i210(struct igb_adapter *adapter,
{
struct e1000_hw *hw = &adapter->hw;
- /*
- * Writing the SYSTIMR register is not necessary as it only provides
+ /* Writing the SYSTIMR register is not necessary as it only provides
* sub-nanosecond resolution.
*/
wr32(E1000_SYSTIML, ts->tv_nsec);
@@ -183,6 +172,7 @@ static void igb_ptp_systim_to_hwtstamp(struct igb_adapter *adapter,
switch (adapter->hw.mac.type) {
case e1000_82576:
case e1000_82580:
+ case e1000_i354:
case e1000_i350:
spin_lock_irqsave(&adapter->tmreg_lock, flags);
@@ -205,10 +195,7 @@ static void igb_ptp_systim_to_hwtstamp(struct igb_adapter *adapter,
}
}
-/*
- * PTP clock operations
- */
-
+/* PTP clock operations */
static int igb_ptp_adjfreq_82576(struct ptp_clock_info *ptp, s32 ppb)
{
struct igb_adapter *igb = container_of(ptp, struct igb_adapter,
@@ -373,8 +360,8 @@ static int igb_ptp_settime_i210(struct ptp_clock_info *ptp,
return 0;
}
-static int igb_ptp_enable(struct ptp_clock_info *ptp,
- struct ptp_clock_request *rq, int on)
+static int igb_ptp_feature_enable(struct ptp_clock_info *ptp,
+ struct ptp_clock_request *rq, int on)
{
return -EOPNOTSUPP;
}
@@ -385,8 +372,8 @@ static int igb_ptp_enable(struct ptp_clock_info *ptp,
*
* This work function polls the TSYNCTXCTL valid bit to determine when a
* timestamp has been taken for the current stored skb.
- */
-void igb_ptp_tx_work(struct work_struct *work)
+ **/
+static void igb_ptp_tx_work(struct work_struct *work)
{
struct igb_adapter *adapter = container_of(work, struct igb_adapter,
ptp_tx_work);
@@ -396,6 +383,16 @@ void igb_ptp_tx_work(struct work_struct *work)
if (!adapter->ptp_tx_skb)
return;
+ if (time_is_before_jiffies(adapter->ptp_tx_start +
+ IGB_PTP_TX_TIMEOUT)) {
+ dev_kfree_skb_any(adapter->ptp_tx_skb);
+ adapter->ptp_tx_skb = NULL;
+ clear_bit_unlock(__IGB_PTP_TX_IN_PROGRESS, &adapter->state);
+ adapter->tx_hwtstamp_timeouts++;
+ dev_warn(&adapter->pdev->dev, "clearing Tx timestamp hang\n");
+ return;
+ }
+
tsynctxctl = rd32(E1000_TSYNCTXCTL);
if (tsynctxctl & E1000_TSYNCTXCTL_VALID)
igb_ptp_tx_hwtstamp(adapter);
@@ -419,14 +416,54 @@ static void igb_ptp_overflow_check(struct work_struct *work)
}
/**
+ * igb_ptp_rx_hang - detect error case when Rx timestamp registers latched
+ * @adapter: private network adapter structure
+ *
+ * This watchdog task is scheduled to detect error case where hardware has
+ * dropped an Rx packet that was timestamped when the ring is full. The
+ * particular error is rare but leaves the device in a state unable to timestamp
+ * any future packets.
+ **/
+void igb_ptp_rx_hang(struct igb_adapter *adapter)
+{
+ struct e1000_hw *hw = &adapter->hw;
+ u32 tsyncrxctl = rd32(E1000_TSYNCRXCTL);
+ unsigned long rx_event;
+
+ if (hw->mac.type != e1000_82576)
+ return;
+
+ /* If we don't have a valid timestamp in the registers, just update the
+ * timeout counter and exit
+ */
+ if (!(tsyncrxctl & E1000_TSYNCRXCTL_VALID)) {
+ adapter->last_rx_ptp_check = jiffies;
+ return;
+ }
+
+ /* Determine the most recent watchdog or rx_timestamp event */
+ rx_event = adapter->last_rx_ptp_check;
+ if (time_after(adapter->last_rx_timestamp, rx_event))
+ rx_event = adapter->last_rx_timestamp;
+
+ /* Only need to read the high RXSTMP register to clear the lock */
+ if (time_is_before_jiffies(rx_event + 5 * HZ)) {
+ rd32(E1000_RXSTMPH);
+ adapter->last_rx_ptp_check = jiffies;
+ adapter->rx_hwtstamp_cleared++;
+ dev_warn(&adapter->pdev->dev, "clearing Rx timestamp hang\n");
+ }
+}
+
+/**
* igb_ptp_tx_hwtstamp - utility function which checks for TX time stamp
* @adapter: Board private structure.
*
* If we were asked to do hardware stamping and such a time stamp is
* available, then it must have been for this skb here because we only
* allow only one such packet into the queue.
- */
-void igb_ptp_tx_hwtstamp(struct igb_adapter *adapter)
+ **/
+static void igb_ptp_tx_hwtstamp(struct igb_adapter *adapter)
{
struct e1000_hw *hw = &adapter->hw;
struct skb_shared_hwtstamps shhwtstamps;
@@ -439,6 +476,7 @@ void igb_ptp_tx_hwtstamp(struct igb_adapter *adapter)
skb_tstamp_tx(adapter->ptp_tx_skb, &shhwtstamps);
dev_kfree_skb_any(adapter->ptp_tx_skb);
adapter->ptp_tx_skb = NULL;
+ clear_bit_unlock(__IGB_PTP_TX_IN_PROGRESS, &adapter->state);
}
/**
@@ -450,15 +488,14 @@ void igb_ptp_tx_hwtstamp(struct igb_adapter *adapter)
* This function is meant to retrieve a timestamp from the first buffer of an
* incoming frame. The value is stored in little endian format starting on
* byte 8.
- */
+ **/
void igb_ptp_rx_pktstamp(struct igb_q_vector *q_vector,
unsigned char *va,
struct sk_buff *skb)
{
__le64 *regval = (__le64 *)va;
- /*
- * The timestamp is recorded in little endian format.
+ /* The timestamp is recorded in little endian format.
* DWORD: 0 1 2 3
* Field: Reserved Reserved SYSTIML SYSTIMH
*/
@@ -473,7 +510,7 @@ void igb_ptp_rx_pktstamp(struct igb_q_vector *q_vector,
*
* This function is meant to retrieve a timestamp from the internal registers
* of the adapter and store it in the skb.
- */
+ **/
void igb_ptp_rx_rgtstamp(struct igb_q_vector *q_vector,
struct sk_buff *skb)
{
@@ -481,8 +518,7 @@ void igb_ptp_rx_rgtstamp(struct igb_q_vector *q_vector,
struct e1000_hw *hw = &adapter->hw;
u64 regval;
- /*
- * If this bit is set, then the RX registers contain the time stamp. No
+ /* If this bit is set, then the RX registers contain the time stamp. No
* other packet will be time stamped until we read these registers, so
* read the registers to make them available again. Because only one
* packet can be time stamped at a time, we know that the register
@@ -499,13 +535,35 @@ void igb_ptp_rx_rgtstamp(struct igb_q_vector *q_vector,
regval |= (u64)rd32(E1000_RXSTMPH) << 32;
igb_ptp_systim_to_hwtstamp(adapter, skb_hwtstamps(skb), regval);
+
+ /* Update the last_rx_timestamp timer in order to enable watchdog check
+ * for error case of latched timestamp on a dropped packet.
+ */
+ adapter->last_rx_timestamp = jiffies;
}
/**
- * igb_ptp_hwtstamp_ioctl - control hardware time stamping
+ * igb_ptp_get_ts_config - get hardware time stamping config
* @netdev:
* @ifreq:
- * @cmd:
+ *
+ * Get the hwtstamp_config settings to return to the user. Rather than attempt
+ * to deconstruct the settings from the registers, just return a shadow copy
+ * of the last known settings.
+ **/
+int igb_ptp_get_ts_config(struct net_device *netdev, struct ifreq *ifr)
+{
+ struct igb_adapter *adapter = netdev_priv(netdev);
+ struct hwtstamp_config *config = &adapter->tstamp_config;
+
+ return copy_to_user(ifr->ifr_data, config, sizeof(*config)) ?
+ -EFAULT : 0;
+}
+
+/**
+ * igb_ptp_set_timestamp_mode - setup hardware for timestamping
+ * @adapter: networking device structure
+ * @config: hwtstamp configuration
*
* Outgoing time stamping can be enabled and disabled. Play nice and
* disable it when requested, although it shouldn't case any overhead
@@ -518,14 +576,11 @@ void igb_ptp_rx_rgtstamp(struct igb_q_vector *q_vector,
* type has to be specified. Matching the kind of event packet is
* not supported, with the exception of "all V2 events regardless of
* level 2 or 4".
- *
- **/
-int igb_ptp_hwtstamp_ioctl(struct net_device *netdev,
- struct ifreq *ifr, int cmd)
+ */
+static int igb_ptp_set_timestamp_mode(struct igb_adapter *adapter,
+ struct hwtstamp_config *config)
{
- struct igb_adapter *adapter = netdev_priv(netdev);
struct e1000_hw *hw = &adapter->hw;
- struct hwtstamp_config config;
u32 tsync_tx_ctl = E1000_TSYNCTXCTL_ENABLED;
u32 tsync_rx_ctl = E1000_TSYNCRXCTL_ENABLED;
u32 tsync_rx_cfg = 0;
@@ -533,14 +588,11 @@ int igb_ptp_hwtstamp_ioctl(struct net_device *netdev,
bool is_l2 = false;
u32 regval;
- if (copy_from_user(&config, ifr->ifr_data, sizeof(config)))
- return -EFAULT;
-
/* reserved for future extensions */
- if (config.flags)
+ if (config->flags)
return -EINVAL;
- switch (config.tx_type) {
+ switch (config->tx_type) {
case HWTSTAMP_TX_OFF:
tsync_tx_ctl = 0;
case HWTSTAMP_TX_ON:
@@ -549,7 +601,7 @@ int igb_ptp_hwtstamp_ioctl(struct net_device *netdev,
return -ERANGE;
}
- switch (config.rx_filter) {
+ switch (config->rx_filter) {
case HWTSTAMP_FILTER_NONE:
tsync_rx_ctl = 0;
break;
@@ -573,7 +625,7 @@ int igb_ptp_hwtstamp_ioctl(struct net_device *netdev,
case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_EVENT_V2;
- config.rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT;
+ config->rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT;
is_l2 = true;
is_l4 = true;
break;
@@ -584,12 +636,12 @@ int igb_ptp_hwtstamp_ioctl(struct net_device *netdev,
*/
if (hw->mac.type != e1000_82576) {
tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_ALL;
- config.rx_filter = HWTSTAMP_FILTER_ALL;
+ config->rx_filter = HWTSTAMP_FILTER_ALL;
break;
}
/* fall through */
default:
- config.rx_filter = HWTSTAMP_FILTER_NONE;
+ config->rx_filter = HWTSTAMP_FILTER_NONE;
return -ERANGE;
}
@@ -599,15 +651,14 @@ int igb_ptp_hwtstamp_ioctl(struct net_device *netdev,
return 0;
}
- /*
- * Per-packet timestamping only works if all packets are
+ /* Per-packet timestamping only works if all packets are
* timestamped, so enable timestamping in all packets as
- * long as one rx filter was configured.
+ * long as one Rx filter was configured.
*/
if ((hw->mac.type >= e1000_82580) && tsync_rx_ctl) {
tsync_rx_ctl = E1000_TSYNCRXCTL_ENABLED;
tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_ALL;
- config.rx_filter = HWTSTAMP_FILTER_ALL;
+ config->rx_filter = HWTSTAMP_FILTER_ALL;
is_l2 = true;
is_l4 = true;
@@ -643,7 +694,6 @@ int igb_ptp_hwtstamp_ioctl(struct net_device *netdev,
else
wr32(E1000_ETQF(3), 0);
-#define PTP_PORT 319
/* L4 Queue Filter[3]: filter by destination port and protocol */
if (is_l4) {
u32 ftqf = (IPPROTO_UDP /* UDP */
@@ -652,12 +702,12 @@ int igb_ptp_hwtstamp_ioctl(struct net_device *netdev,
| E1000_FTQF_MASK); /* mask all inputs */
ftqf &= ~E1000_FTQF_MASK_PROTO_BP; /* enable protocol check */
- wr32(E1000_IMIR(3), htons(PTP_PORT));
+ wr32(E1000_IMIR(3), htons(PTP_EV_PORT));
wr32(E1000_IMIREXT(3),
(E1000_IMIREXT_SIZE_BP | E1000_IMIREXT_CTRL_BP));
if (hw->mac.type == e1000_82576) {
/* enable source port check */
- wr32(E1000_SPQF(3), htons(PTP_PORT));
+ wr32(E1000_SPQF(3), htons(PTP_EV_PORT));
ftqf &= ~E1000_FTQF_MASK_SOURCE_PORT_BP;
}
wr32(E1000_FTQF(3), ftqf);
@@ -672,6 +722,32 @@ int igb_ptp_hwtstamp_ioctl(struct net_device *netdev,
regval = rd32(E1000_RXSTMPL);
regval = rd32(E1000_RXSTMPH);
+ return 0;
+}
+
+/**
+ * igb_ptp_set_ts_config - set hardware time stamping config
+ * @netdev:
+ * @ifreq:
+ *
+ **/
+int igb_ptp_set_ts_config(struct net_device *netdev, struct ifreq *ifr)
+{
+ struct igb_adapter *adapter = netdev_priv(netdev);
+ struct hwtstamp_config config;
+ int err;
+
+ if (copy_from_user(&config, ifr->ifr_data, sizeof(config)))
+ return -EFAULT;
+
+ err = igb_ptp_set_timestamp_mode(adapter, &config);
+ if (err)
+ return err;
+
+ /* save these settings for future reference */
+ memcpy(&adapter->tstamp_config, &config,
+ sizeof(adapter->tstamp_config));
+
return copy_to_user(ifr->ifr_data, &config, sizeof(config)) ?
-EFAULT : 0;
}
@@ -685,14 +761,14 @@ void igb_ptp_init(struct igb_adapter *adapter)
case e1000_82576:
snprintf(adapter->ptp_caps.name, 16, "%pm", netdev->dev_addr);
adapter->ptp_caps.owner = THIS_MODULE;
- adapter->ptp_caps.max_adj = 1000000000;
+ adapter->ptp_caps.max_adj = 999999881;
adapter->ptp_caps.n_ext_ts = 0;
adapter->ptp_caps.pps = 0;
adapter->ptp_caps.adjfreq = igb_ptp_adjfreq_82576;
adapter->ptp_caps.adjtime = igb_ptp_adjtime_82576;
adapter->ptp_caps.gettime = igb_ptp_gettime_82576;
adapter->ptp_caps.settime = igb_ptp_settime_82576;
- adapter->ptp_caps.enable = igb_ptp_enable;
+ adapter->ptp_caps.enable = igb_ptp_feature_enable;
adapter->cc.read = igb_ptp_read_82576;
adapter->cc.mask = CLOCKSOURCE_MASK(64);
adapter->cc.mult = 1;
@@ -701,6 +777,7 @@ void igb_ptp_init(struct igb_adapter *adapter)
wr32(E1000_TIMINCA, INCPERIOD_82576 | INCVALUE_82576);
break;
case e1000_82580:
+ case e1000_i354:
case e1000_i350:
snprintf(adapter->ptp_caps.name, 16, "%pm", netdev->dev_addr);
adapter->ptp_caps.owner = THIS_MODULE;
@@ -711,7 +788,7 @@ void igb_ptp_init(struct igb_adapter *adapter)
adapter->ptp_caps.adjtime = igb_ptp_adjtime_82576;
adapter->ptp_caps.gettime = igb_ptp_gettime_82576;
adapter->ptp_caps.settime = igb_ptp_settime_82576;
- adapter->ptp_caps.enable = igb_ptp_enable;
+ adapter->ptp_caps.enable = igb_ptp_feature_enable;
adapter->cc.read = igb_ptp_read_82580;
adapter->cc.mask = CLOCKSOURCE_MASK(IGB_NBITS_82580);
adapter->cc.mult = 1;
@@ -730,7 +807,7 @@ void igb_ptp_init(struct igb_adapter *adapter)
adapter->ptp_caps.adjtime = igb_ptp_adjtime_i210;
adapter->ptp_caps.gettime = igb_ptp_gettime_i210;
adapter->ptp_caps.settime = igb_ptp_settime_i210;
- adapter->ptp_caps.enable = igb_ptp_enable;
+ adapter->ptp_caps.enable = igb_ptp_feature_enable;
/* Enable the timer functions by clearing bit 31. */
wr32(E1000_TSAUXC, 0x0);
break;
@@ -762,10 +839,13 @@ void igb_ptp_init(struct igb_adapter *adapter)
/* Initialize the time sync interrupts for devices that support it. */
if (hw->mac.type >= e1000_82580) {
- wr32(E1000_TSIM, E1000_TSIM_TXTS);
+ wr32(E1000_TSIM, TSYNC_INTERRUPTS);
wr32(E1000_IMS, E1000_IMS_TS);
}
+ adapter->tstamp_config.rx_filter = HWTSTAMP_FILTER_NONE;
+ adapter->tstamp_config.tx_type = HWTSTAMP_TX_OFF;
+
adapter->ptp_clock = ptp_clock_register(&adapter->ptp_caps,
&adapter->pdev->dev);
if (IS_ERR(adapter->ptp_clock)) {
@@ -789,6 +869,7 @@ void igb_ptp_stop(struct igb_adapter *adapter)
switch (adapter->hw.mac.type) {
case e1000_82576:
case e1000_82580:
+ case e1000_i354:
case e1000_i350:
cancel_delayed_work_sync(&adapter->ptp_overflow_work);
break;
@@ -801,6 +882,11 @@ void igb_ptp_stop(struct igb_adapter *adapter)
}
cancel_work_sync(&adapter->ptp_tx_work);
+ if (adapter->ptp_tx_skb) {
+ dev_kfree_skb_any(adapter->ptp_tx_skb);
+ adapter->ptp_tx_skb = NULL;
+ clear_bit_unlock(__IGB_PTP_TX_IN_PROGRESS, &adapter->state);
+ }
if (adapter->ptp_clock) {
ptp_clock_unregister(adapter->ptp_clock);
@@ -823,18 +909,22 @@ void igb_ptp_reset(struct igb_adapter *adapter)
if (!(adapter->flags & IGB_FLAG_PTP))
return;
+ /* reset the tstamp_config */
+ igb_ptp_set_timestamp_mode(adapter, &adapter->tstamp_config);
+
switch (adapter->hw.mac.type) {
case e1000_82576:
/* Dial the nominal frequency. */
wr32(E1000_TIMINCA, INCPERIOD_82576 | INCVALUE_82576);
break;
case e1000_82580:
+ case e1000_i354:
case e1000_i350:
case e1000_i210:
case e1000_i211:
/* Enable the timer functions and interrupts. */
wr32(E1000_TSAUXC, 0x0);
- wr32(E1000_TSIM, E1000_TSIM_TXTS);
+ wr32(E1000_TSIM, TSYNC_INTERRUPTS);
wr32(E1000_IMS, E1000_IMS_TS);
break;
default: