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Message-ID: <20091028094600.13156.98409.stgit@localhost.localdomain>
Date: Wed, 28 Oct 2009 02:46:01 -0700
From: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
To: davem@...emloft.net
Cc: netdev@...r.kernel.org, gospo@...hat.com,
Alexander Duyck <alexander.h.duyck@...el.com>,
Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Subject: [net-next-2.6 PATCH 02/23] igb: cleanup some of the code related to
hw timestamping
From: Alexander Duyck <alexander.h.duyck@...el.com>
The code for the hw timestamping is a bit bulky and making some of the
functions difficult to read. In order to clean things up a bit I am moving
the timestamping operations into seperate functions.
Signed-off-by: Alexander Duyck <alexander.h.duyck@...el.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
---
drivers/net/igb/e1000_82575.h | 14 +
drivers/net/igb/e1000_defines.h | 33 +++
drivers/net/igb/e1000_regs.h | 65 +-----
drivers/net/igb/igb.h | 1
drivers/net/igb/igb_main.c | 397 ++++++++++++++++++---------------------
5 files changed, 242 insertions(+), 268 deletions(-)
diff --git a/drivers/net/igb/e1000_82575.h b/drivers/net/igb/e1000_82575.h
index 9418683..cbe4757 100644
--- a/drivers/net/igb/e1000_82575.h
+++ b/drivers/net/igb/e1000_82575.h
@@ -66,6 +66,8 @@ extern void igb_rx_fifo_flush_82575(struct e1000_hw *hw);
E1000_EICR_RX_QUEUE3)
/* Immediate Interrupt Rx (A.K.A. Low Latency Interrupt) */
+#define E1000_IMIREXT_SIZE_BP 0x00001000 /* Packet size bypass */
+#define E1000_IMIREXT_CTRL_BP 0x00080000 /* Bypass check of ctrl bits */
/* Receive Descriptor - Advanced */
union e1000_adv_rx_desc {
@@ -98,6 +100,7 @@ union e1000_adv_rx_desc {
#define E1000_RXDADV_HDRBUFLEN_MASK 0x7FE0
#define E1000_RXDADV_HDRBUFLEN_SHIFT 5
+#define E1000_RXDADV_STAT_TS 0x10000 /* Pkt was time stamped */
/* Transmit Descriptor - Advanced */
union e1000_adv_tx_desc {
@@ -167,6 +170,17 @@ struct e1000_adv_tx_context_desc {
#define E1000_DCA_TXCTRL_CPUID_SHIFT 24 /* Tx CPUID now in the last byte */
#define E1000_DCA_RXCTRL_CPUID_SHIFT 24 /* Rx CPUID now in the last byte */
+/* ETQF register bit definitions */
+#define E1000_ETQF_FILTER_ENABLE (1 << 26)
+#define E1000_ETQF_1588 (1 << 30)
+
+/* FTQF register bit definitions */
+#define E1000_FTQF_VF_BP 0x00008000
+#define E1000_FTQF_1588_TIME_STAMP 0x08000000
+#define E1000_FTQF_MASK 0xF0000000
+#define E1000_FTQF_MASK_PROTO_BP 0x10000000
+#define E1000_FTQF_MASK_SOURCE_PORT_BP 0x80000000
+
#define E1000_NVM_APME_82575 0x0400
#define MAX_NUM_VFS 8
diff --git a/drivers/net/igb/e1000_defines.h b/drivers/net/igb/e1000_defines.h
index cb91683..48fcab0 100644
--- a/drivers/net/igb/e1000_defines.h
+++ b/drivers/net/igb/e1000_defines.h
@@ -435,6 +435,39 @@
/* Flow Control */
#define E1000_FCRTL_XONE 0x80000000 /* Enable XON frame transmission */
+#define E1000_TSYNCTXCTL_VALID 0x00000001 /* tx timestamp valid */
+#define E1000_TSYNCTXCTL_ENABLED 0x00000010 /* enable tx timestampping */
+
+#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 timestampping */
+
+#define E1000_TSYNCRXCFG_PTP_V1_CTRLT_MASK 0x000000FF
+#define E1000_TSYNCRXCFG_PTP_V1_SYNC_MESSAGE 0x00
+#define E1000_TSYNCRXCFG_PTP_V1_DELAY_REQ_MESSAGE 0x01
+#define E1000_TSYNCRXCFG_PTP_V1_FOLLOWUP_MESSAGE 0x02
+#define E1000_TSYNCRXCFG_PTP_V1_DELAY_RESP_MESSAGE 0x03
+#define E1000_TSYNCRXCFG_PTP_V1_MANAGEMENT_MESSAGE 0x04
+
+#define E1000_TSYNCRXCFG_PTP_V2_MSGID_MASK 0x00000F00
+#define E1000_TSYNCRXCFG_PTP_V2_SYNC_MESSAGE 0x0000
+#define E1000_TSYNCRXCFG_PTP_V2_DELAY_REQ_MESSAGE 0x0100
+#define E1000_TSYNCRXCFG_PTP_V2_PATH_DELAY_REQ_MESSAGE 0x0200
+#define E1000_TSYNCRXCFG_PTP_V2_PATH_DELAY_RESP_MESSAGE 0x0300
+#define E1000_TSYNCRXCFG_PTP_V2_FOLLOWUP_MESSAGE 0x0800
+#define E1000_TSYNCRXCFG_PTP_V2_DELAY_RESP_MESSAGE 0x0900
+#define E1000_TSYNCRXCFG_PTP_V2_PATH_DELAY_FOLLOWUP_MESSAGE 0x0A00
+#define E1000_TSYNCRXCFG_PTP_V2_ANNOUNCE_MESSAGE 0x0B00
+#define E1000_TSYNCRXCFG_PTP_V2_SIGNALLING_MESSAGE 0x0C00
+#define E1000_TSYNCRXCFG_PTP_V2_MANAGEMENT_MESSAGE 0x0D00
+
+#define E1000_TIMINCA_16NS_SHIFT 24
+
/* PCI Express Control */
#define E1000_GCR_CMPL_TMOUT_MASK 0x0000F000
#define E1000_GCR_CMPL_TMOUT_10ms 0x00001000
diff --git a/drivers/net/igb/e1000_regs.h b/drivers/net/igb/e1000_regs.h
index e06c3b7..24f2c24 100644
--- a/drivers/net/igb/e1000_regs.h
+++ b/drivers/net/igb/e1000_regs.h
@@ -76,59 +76,18 @@
#define E1000_FCRTV 0x02460 /* Flow Control Refresh Timer Value - RW */
/* IEEE 1588 TIMESYNCH */
-#define E1000_TSYNCTXCTL 0x0B614
-#define E1000_TSYNCTXCTL_VALID (1<<0)
-#define E1000_TSYNCTXCTL_ENABLED (1<<4)
-#define E1000_TSYNCRXCTL 0x0B620
-#define E1000_TSYNCRXCTL_VALID (1<<0)
-#define E1000_TSYNCRXCTL_ENABLED (1<<4)
-enum {
- E1000_TSYNCRXCTL_TYPE_L2_V2 = 0,
- E1000_TSYNCRXCTL_TYPE_L4_V1 = (1<<1),
- E1000_TSYNCRXCTL_TYPE_L2_L4_V2 = (1<<2),
- E1000_TSYNCRXCTL_TYPE_ALL = (1<<3),
- E1000_TSYNCRXCTL_TYPE_EVENT_V2 = (1<<3) | (1<<1),
-};
-#define E1000_TSYNCRXCFG 0x05F50
-enum {
- E1000_TSYNCRXCFG_PTP_V1_SYNC_MESSAGE = 0<<0,
- E1000_TSYNCRXCFG_PTP_V1_DELAY_REQ_MESSAGE = 1<<0,
- E1000_TSYNCRXCFG_PTP_V1_FOLLOWUP_MESSAGE = 2<<0,
- E1000_TSYNCRXCFG_PTP_V1_DELAY_RESP_MESSAGE = 3<<0,
- E1000_TSYNCRXCFG_PTP_V1_MANAGEMENT_MESSAGE = 4<<0,
-
- E1000_TSYNCRXCFG_PTP_V2_SYNC_MESSAGE = 0<<8,
- E1000_TSYNCRXCFG_PTP_V2_DELAY_REQ_MESSAGE = 1<<8,
- E1000_TSYNCRXCFG_PTP_V2_PATH_DELAY_REQ_MESSAGE = 2<<8,
- E1000_TSYNCRXCFG_PTP_V2_PATH_DELAY_RESP_MESSAGE = 3<<8,
- E1000_TSYNCRXCFG_PTP_V2_FOLLOWUP_MESSAGE = 8<<8,
- E1000_TSYNCRXCFG_PTP_V2_DELAY_RESP_MESSAGE = 9<<8,
- E1000_TSYNCRXCFG_PTP_V2_PATH_DELAY_FOLLOWUP_MESSAGE = 0xA<<8,
- E1000_TSYNCRXCFG_PTP_V2_ANNOUNCE_MESSAGE = 0xB<<8,
- E1000_TSYNCRXCFG_PTP_V2_SIGNALLING_MESSAGE = 0xC<<8,
- E1000_TSYNCRXCFG_PTP_V2_MANAGEMENT_MESSAGE = 0xD<<8,
-};
-#define E1000_SYSTIML 0x0B600
-#define E1000_SYSTIMH 0x0B604
-#define E1000_TIMINCA 0x0B608
-
-#define E1000_RXMTRL 0x0B634
-#define E1000_RXSTMPL 0x0B624
-#define E1000_RXSTMPH 0x0B628
-#define E1000_RXSATRL 0x0B62C
-#define E1000_RXSATRH 0x0B630
-
-#define E1000_TXSTMPL 0x0B618
-#define E1000_TXSTMPH 0x0B61C
-
-#define E1000_ETQF0 0x05CB0
-#define E1000_ETQF1 0x05CB4
-#define E1000_ETQF2 0x05CB8
-#define E1000_ETQF3 0x05CBC
-#define E1000_ETQF4 0x05CC0
-#define E1000_ETQF5 0x05CC4
-#define E1000_ETQF6 0x05CC8
-#define E1000_ETQF7 0x05CCC
+#define E1000_TSYNCRXCTL 0x0B620 /* Rx Time Sync Control register - RW */
+#define E1000_TSYNCTXCTL 0x0B614 /* Tx Time Sync Control register - RW */
+#define E1000_TSYNCRXCFG 0x05F50 /* Time Sync Rx Configuration - RW */
+#define E1000_RXSTMPL 0x0B624 /* Rx timestamp Low - RO */
+#define E1000_RXSTMPH 0x0B628 /* Rx timestamp High - RO */
+#define E1000_RXSATRL 0x0B62C /* Rx timestamp attribute low - RO */
+#define E1000_RXSATRH 0x0B630 /* Rx timestamp attribute high - RO */
+#define E1000_TXSTMPL 0x0B618 /* Tx timestamp value Low - RO */
+#define E1000_TXSTMPH 0x0B61C /* Tx timestamp value High - RO */
+#define E1000_SYSTIML 0x0B600 /* System time register Low - RO */
+#define E1000_SYSTIMH 0x0B604 /* System time register High - RO */
+#define E1000_TIMINCA 0x0B608 /* Increment attributes register - RW */
/* Filtering Registers */
#define E1000_SAQF(_n) (0x5980 + 4 * (_n))
diff --git a/drivers/net/igb/igb.h b/drivers/net/igb/igb.h
index bef8cdc..1a0ae57 100644
--- a/drivers/net/igb/igb.h
+++ b/drivers/net/igb/igb.h
@@ -323,6 +323,7 @@ struct igb_adapter {
#define IGB_FLAG_QUAD_PORT_A (1 << 2)
#define IGB_FLAG_QUEUE_PAIRS (1 << 3)
+#define IGB_82576_TSYNC_SHIFT 19
enum e1000_state_t {
__IGB_TESTING,
__IGB_RESETTING,
diff --git a/drivers/net/igb/igb_main.c b/drivers/net/igb/igb_main.c
index 5724ac8..7e628ba 100644
--- a/drivers/net/igb/igb_main.c
+++ b/drivers/net/igb/igb_main.c
@@ -220,38 +220,6 @@ MODULE_LICENSE("GPL");
MODULE_VERSION(DRV_VERSION);
/**
- * Scale the NIC clock cycle by a large factor so that
- * relatively small clock corrections can be added or
- * substracted at each clock tick. The drawbacks of a
- * large factor are a) that the clock register overflows
- * more quickly (not such a big deal) and b) that the
- * increment per tick has to fit into 24 bits.
- *
- * Note that
- * TIMINCA = IGB_TSYNC_CYCLE_TIME_IN_NANOSECONDS *
- * IGB_TSYNC_SCALE
- * TIMINCA += TIMINCA * adjustment [ppm] / 1e9
- *
- * The base scale factor is intentionally a power of two
- * so that the division in %struct timecounter can be done with
- * a shift.
- */
-#define IGB_TSYNC_SHIFT (19)
-#define IGB_TSYNC_SCALE (1<<IGB_TSYNC_SHIFT)
-
-/**
- * The duration of one clock cycle of the NIC.
- *
- * @todo This hard-coded value is part of the specification and might change
- * in future hardware revisions. Add revision check.
- */
-#define IGB_TSYNC_CYCLE_TIME_IN_NANOSECONDS 16
-
-#if (IGB_TSYNC_SCALE * IGB_TSYNC_CYCLE_TIME_IN_NANOSECONDS) >= (1<<24)
-# error IGB_TSYNC_SCALE and/or IGB_TSYNC_CYCLE_TIME_IN_NANOSECONDS are too large to fit into TIMINCA
-#endif
-
-/**
* igb_read_clock - read raw cycle counter (to be used by time counter)
*/
static cycle_t igb_read_clock(const struct cyclecounter *tc)
@@ -259,11 +227,11 @@ static cycle_t igb_read_clock(const struct cyclecounter *tc)
struct igb_adapter *adapter =
container_of(tc, struct igb_adapter, cycles);
struct e1000_hw *hw = &adapter->hw;
- u64 stamp;
-
- stamp = rd32(E1000_SYSTIML);
- stamp |= (u64)rd32(E1000_SYSTIMH) << 32ULL;
+ u64 stamp = 0;
+ int shift = 0;
+ stamp |= (u64)rd32(E1000_SYSTIML) << shift;
+ stamp |= (u64)rd32(E1000_SYSTIMH) << (shift + 32);
return stamp;
}
@@ -1669,59 +1637,58 @@ static int __devinit igb_probe(struct pci_dev *pdev,
dev_info(&pdev->dev, "DCA enabled\n");
igb_setup_dca(adapter);
}
-#endif
- /*
- * Initialize hardware timer: we keep it running just in case
- * that some program needs it later on.
- */
- memset(&adapter->cycles, 0, sizeof(adapter->cycles));
- adapter->cycles.read = igb_read_clock;
- adapter->cycles.mask = CLOCKSOURCE_MASK(64);
- adapter->cycles.mult = 1;
- adapter->cycles.shift = IGB_TSYNC_SHIFT;
- wr32(E1000_TIMINCA,
- (1<<24) |
- IGB_TSYNC_CYCLE_TIME_IN_NANOSECONDS * IGB_TSYNC_SCALE);
-#if 0
- /*
- * Avoid rollover while we initialize by resetting the time counter.
- */
- wr32(E1000_SYSTIML, 0x00000000);
- wr32(E1000_SYSTIMH, 0x00000000);
-#else
- /*
- * Set registers so that rollover occurs soon to test this.
- */
- wr32(E1000_SYSTIML, 0x00000000);
- wr32(E1000_SYSTIMH, 0xFF800000);
#endif
- wrfl();
- timecounter_init(&adapter->clock,
- &adapter->cycles,
- ktime_to_ns(ktime_get_real()));
- /*
- * Synchronize our NIC clock against system wall clock. NIC
- * time stamp reading requires ~3us per sample, each sample
- * was pretty stable even under load => only require 10
- * samples for each offset comparison.
- */
- memset(&adapter->compare, 0, sizeof(adapter->compare));
- adapter->compare.source = &adapter->clock;
- adapter->compare.target = ktime_get_real;
- adapter->compare.num_samples = 10;
- timecompare_update(&adapter->compare, 0);
-
-#ifdef DEBUG
- {
- char buffer[160];
- printk(KERN_DEBUG
- "igb: %s: hw %p initialized timer\n",
- igb_get_time_str(adapter, buffer),
- &adapter->hw);
+ switch (hw->mac.type) {
+ case e1000_82576:
+ /*
+ * Initialize hardware timer: we keep it running just in case
+ * that some program needs it later on.
+ */
+ memset(&adapter->cycles, 0, sizeof(adapter->cycles));
+ adapter->cycles.read = igb_read_clock;
+ adapter->cycles.mask = CLOCKSOURCE_MASK(64);
+ adapter->cycles.mult = 1;
+ /**
+ * Scale the NIC clock cycle by a large factor so that
+ * relatively small clock corrections can be added or
+ * substracted at each clock tick. The drawbacks of a large
+ * factor are a) that the clock register overflows more quickly
+ * (not such a big deal) and b) that the increment per tick has
+ * to fit into 24 bits. As a result we need to use a shift of
+ * 19 so we can fit a value of 16 into the TIMINCA register.
+ */
+ adapter->cycles.shift = IGB_82576_TSYNC_SHIFT;
+ wr32(E1000_TIMINCA,
+ (1 << E1000_TIMINCA_16NS_SHIFT) |
+ (16 << IGB_82576_TSYNC_SHIFT));
+
+ /* Set registers so that rollover occurs soon to test this. */
+ wr32(E1000_SYSTIML, 0x00000000);
+ wr32(E1000_SYSTIMH, 0xFF800000);
+ wrfl();
+
+ timecounter_init(&adapter->clock,
+ &adapter->cycles,
+ ktime_to_ns(ktime_get_real()));
+ /*
+ * Synchronize our NIC clock against system wall clock. NIC
+ * time stamp reading requires ~3us per sample, each sample
+ * was pretty stable even under load => only require 10
+ * samples for each offset comparison.
+ */
+ memset(&adapter->compare, 0, sizeof(adapter->compare));
+ adapter->compare.source = &adapter->clock;
+ adapter->compare.target = ktime_get_real;
+ adapter->compare.num_samples = 10;
+ timecompare_update(&adapter->compare, 0);
+ break;
+ case e1000_82575:
+ /* 82575 does not support timesync */
+ default:
+ break;
}
-#endif
dev_info(&pdev->dev, "Intel(R) Gigabit Ethernet Network Connection\n");
/* print bus type/speed/width info */
@@ -3596,7 +3563,7 @@ netdev_tx_t igb_xmit_frame_ring_adv(struct sk_buff *skb,
u8 hdr_len = 0;
int count = 0;
int tso = 0;
- union skb_shared_tx *shtx;
+ union skb_shared_tx *shtx = skb_tx(skb);
/* need: 1 descriptor per page,
* + 2 desc gap to keep tail from touching head,
@@ -3608,16 +3575,6 @@ netdev_tx_t igb_xmit_frame_ring_adv(struct sk_buff *skb,
return NETDEV_TX_BUSY;
}
- /*
- * TODO: check that there currently is no other packet with
- * time stamping in the queue
- *
- * When doing time stamping, keep the connection to the socket
- * a while longer: it is still needed by skb_hwtstamp_tx(),
- * called either in igb_tx_hwtstamp() or by our caller when
- * doing software time stamping.
- */
- shtx = skb_tx(skb);
if (unlikely(shtx->hardware)) {
shtx->in_progress = 1;
tx_flags |= IGB_TX_FLAGS_TSTAMP;
@@ -4633,37 +4590,54 @@ static int igb_poll(struct napi_struct *napi, int budget)
}
/**
- * igb_hwtstamp - utility function which checks for TX time stamp
+ * igb_systim_to_hwtstamp - convert system time value to hw timestamp
* @adapter: board private structure
+ * @shhwtstamps: timestamp structure to update
+ * @regval: unsigned 64bit system time value.
+ *
+ * We need to convert the system time value stored in the RX/TXSTMP registers
+ * into a hwtstamp which can be used by the upper level timestamping functions
+ */
+static void igb_systim_to_hwtstamp(struct igb_adapter *adapter,
+ struct skb_shared_hwtstamps *shhwtstamps,
+ u64 regval)
+{
+ u64 ns;
+
+ ns = timecounter_cyc2time(&adapter->clock, regval);
+ timecompare_update(&adapter->compare, ns);
+ memset(shhwtstamps, 0, sizeof(struct skb_shared_hwtstamps));
+ shhwtstamps->hwtstamp = ns_to_ktime(ns);
+ shhwtstamps->syststamp = timecompare_transform(&adapter->compare, ns);
+}
+
+/**
+ * igb_tx_hwtstamp - utility function which checks for TX time stamp
+ * @q_vector: pointer to q_vector containing needed info
* @skb: packet that was just sent
*
* 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.
*/
-static void igb_tx_hwtstamp(struct igb_adapter *adapter, struct sk_buff *skb)
+static void igb_tx_hwtstamp(struct igb_q_vector *q_vector, struct sk_buff *skb)
{
+ struct igb_adapter *adapter = q_vector->adapter;
union skb_shared_tx *shtx = skb_tx(skb);
struct e1000_hw *hw = &adapter->hw;
+ struct skb_shared_hwtstamps shhwtstamps;
+ u64 regval;
- if (unlikely(shtx->hardware)) {
- u32 valid = rd32(E1000_TSYNCTXCTL) & E1000_TSYNCTXCTL_VALID;
- if (valid) {
- u64 regval = rd32(E1000_TXSTMPL);
- u64 ns;
- struct skb_shared_hwtstamps shhwtstamps;
-
- memset(&shhwtstamps, 0, sizeof(shhwtstamps));
- regval |= (u64)rd32(E1000_TXSTMPH) << 32;
- ns = timecounter_cyc2time(&adapter->clock,
- regval);
- timecompare_update(&adapter->compare, ns);
- shhwtstamps.hwtstamp = ns_to_ktime(ns);
- shhwtstamps.syststamp =
- timecompare_transform(&adapter->compare, ns);
- skb_tstamp_tx(skb, &shhwtstamps);
- }
- }
+ /* if skb does not support hw timestamp or TX stamp not valid exit */
+ if (likely(!shtx->hardware) ||
+ !(rd32(E1000_TSYNCTXCTL) & E1000_TSYNCTXCTL_VALID))
+ return;
+
+ regval = rd32(E1000_TXSTMPL);
+ regval |= (u64)rd32(E1000_TXSTMPH) << 32;
+
+ igb_systim_to_hwtstamp(adapter, &shhwtstamps, regval);
+ skb_tstamp_tx(skb, &shhwtstamps);
}
/**
@@ -4706,7 +4680,7 @@ static bool igb_clean_tx_irq(struct igb_q_vector *q_vector)
total_packets += segs;
total_bytes += bytecount;
- igb_tx_hwtstamp(adapter, skb);
+ igb_tx_hwtstamp(q_vector, skb);
}
igb_unmap_and_free_tx_resource(tx_ring, buffer_info);
@@ -4831,6 +4805,34 @@ static inline void igb_rx_checksum_adv(struct igb_ring *ring,
dev_dbg(&ring->pdev->dev, "cksum success: bits %08X\n", status_err);
}
+static inline void igb_rx_hwtstamp(struct igb_q_vector *q_vector, u32 staterr,
+ struct sk_buff *skb)
+{
+ struct igb_adapter *adapter = q_vector->adapter;
+ struct e1000_hw *hw = &adapter->hw;
+ u64 regval;
+
+ /*
+ * 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
+ * values must belong to this one here and therefore we don't need to
+ * compare any of the additional attributes stored for it.
+ *
+ * If nothing went wrong, then it should have a skb_shared_tx that we
+ * can turn into a skb_shared_hwtstamps.
+ */
+ if (likely(!(staterr & E1000_RXDADV_STAT_TS)))
+ return;
+ if (!(rd32(E1000_TSYNCRXCTL) & E1000_TSYNCRXCTL_VALID))
+ return;
+
+ regval = rd32(E1000_RXSTMPL);
+ regval |= (u64)rd32(E1000_RXSTMPH) << 32;
+
+ igb_systim_to_hwtstamp(adapter, skb_hwtstamps(skb), regval);
+}
static inline u16 igb_get_hlen(struct igb_ring *rx_ring,
union e1000_adv_rx_desc *rx_desc)
{
@@ -4848,10 +4850,8 @@ static inline u16 igb_get_hlen(struct igb_ring *rx_ring,
static bool igb_clean_rx_irq_adv(struct igb_q_vector *q_vector,
int *work_done, int budget)
{
- struct igb_adapter *adapter = q_vector->adapter;
struct igb_ring *rx_ring = q_vector->rx_ring;
struct net_device *netdev = rx_ring->netdev;
- struct e1000_hw *hw = &adapter->hw;
struct pci_dev *pdev = rx_ring->pdev;
union e1000_adv_rx_desc *rx_desc , *next_rxd;
struct igb_buffer *buffer_info , *next_buffer;
@@ -4930,52 +4930,12 @@ static bool igb_clean_rx_irq_adv(struct igb_q_vector *q_vector,
goto next_desc;
}
send_up:
- /*
- * 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 values must belong to this
- * one here and therefore we don't need to compare
- * any of the additional attributes stored for it.
- *
- * If nothing went wrong, then it should have a
- * skb_shared_tx that we can turn into a
- * skb_shared_hwtstamps.
- *
- * TODO: can time stamping be triggered (thus locking
- * the registers) without the packet reaching this point
- * here? In that case RX time stamping would get stuck.
- *
- * TODO: in "time stamp all packets" mode this bit is
- * not set. Need a global flag for this mode and then
- * always read the registers. Cannot be done without
- * a race condition.
- */
- if (unlikely(staterr & E1000_RXD_STAT_TS)) {
- u64 regval;
- u64 ns;
- struct skb_shared_hwtstamps *shhwtstamps =
- skb_hwtstamps(skb);
-
- WARN(!(rd32(E1000_TSYNCRXCTL) & E1000_TSYNCRXCTL_VALID),
- "igb: no RX time stamp available for time stamped packet");
- regval = rd32(E1000_RXSTMPL);
- regval |= (u64)rd32(E1000_RXSTMPH) << 32;
- ns = timecounter_cyc2time(&adapter->clock, regval);
- timecompare_update(&adapter->compare, ns);
- memset(shhwtstamps, 0, sizeof(*shhwtstamps));
- shhwtstamps->hwtstamp = ns_to_ktime(ns);
- shhwtstamps->syststamp =
- timecompare_transform(&adapter->compare, ns);
- }
-
if (staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) {
dev_kfree_skb_irq(skb);
goto next_desc;
}
+ igb_rx_hwtstamp(q_vector, staterr, skb);
total_bytes += skb->len;
total_packets++;
@@ -5161,13 +5121,11 @@ static int igb_hwtstamp_ioctl(struct net_device *netdev,
struct igb_adapter *adapter = netdev_priv(netdev);
struct e1000_hw *hw = &adapter->hw;
struct hwtstamp_config config;
- u32 tsync_tx_ctl_bit = E1000_TSYNCTXCTL_ENABLED;
- u32 tsync_rx_ctl_bit = E1000_TSYNCRXCTL_ENABLED;
- u32 tsync_rx_ctl_type = 0;
+ u32 tsync_tx_ctl = E1000_TSYNCTXCTL_ENABLED;
+ u32 tsync_rx_ctl = E1000_TSYNCRXCTL_ENABLED;
u32 tsync_rx_cfg = 0;
- int is_l4 = 0;
- int is_l2 = 0;
- short port = 319; /* PTP */
+ bool is_l4 = false;
+ bool is_l2 = false;
u32 regval;
if (copy_from_user(&config, ifr->ifr_data, sizeof(config)))
@@ -5179,10 +5137,8 @@ static int igb_hwtstamp_ioctl(struct net_device *netdev,
switch (config.tx_type) {
case HWTSTAMP_TX_OFF:
- tsync_tx_ctl_bit = 0;
- break;
+ tsync_tx_ctl = 0;
case HWTSTAMP_TX_ON:
- tsync_tx_ctl_bit = E1000_TSYNCTXCTL_ENABLED;
break;
default:
return -ERANGE;
@@ -5190,7 +5146,7 @@ static int igb_hwtstamp_ioctl(struct net_device *netdev,
switch (config.rx_filter) {
case HWTSTAMP_FILTER_NONE:
- tsync_rx_ctl_bit = 0;
+ tsync_rx_ctl = 0;
break;
case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
@@ -5201,86 +5157,97 @@ static int igb_hwtstamp_ioctl(struct net_device *netdev,
* possible to time stamp both Sync and Delay_Req messages
* => fall back to time stamping all packets
*/
- tsync_rx_ctl_type = E1000_TSYNCRXCTL_TYPE_ALL;
+ tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_ALL;
config.rx_filter = HWTSTAMP_FILTER_ALL;
break;
case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
- tsync_rx_ctl_type = E1000_TSYNCRXCTL_TYPE_L4_V1;
+ tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L4_V1;
tsync_rx_cfg = E1000_TSYNCRXCFG_PTP_V1_SYNC_MESSAGE;
- is_l4 = 1;
+ is_l4 = true;
break;
case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
- tsync_rx_ctl_type = E1000_TSYNCRXCTL_TYPE_L4_V1;
+ tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L4_V1;
tsync_rx_cfg = E1000_TSYNCRXCFG_PTP_V1_DELAY_REQ_MESSAGE;
- is_l4 = 1;
+ is_l4 = true;
break;
case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
- tsync_rx_ctl_type = E1000_TSYNCRXCTL_TYPE_L2_L4_V2;
+ tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L2_L4_V2;
tsync_rx_cfg = E1000_TSYNCRXCFG_PTP_V2_SYNC_MESSAGE;
- is_l2 = 1;
- is_l4 = 1;
+ is_l2 = true;
+ is_l4 = true;
config.rx_filter = HWTSTAMP_FILTER_SOME;
break;
case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
- tsync_rx_ctl_type = E1000_TSYNCRXCTL_TYPE_L2_L4_V2;
+ tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L2_L4_V2;
tsync_rx_cfg = E1000_TSYNCRXCFG_PTP_V2_DELAY_REQ_MESSAGE;
- is_l2 = 1;
- is_l4 = 1;
+ is_l2 = true;
+ is_l4 = true;
config.rx_filter = HWTSTAMP_FILTER_SOME;
break;
case HWTSTAMP_FILTER_PTP_V2_EVENT:
case HWTSTAMP_FILTER_PTP_V2_SYNC:
case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
- tsync_rx_ctl_type = E1000_TSYNCRXCTL_TYPE_EVENT_V2;
+ tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_EVENT_V2;
config.rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT;
- is_l2 = 1;
+ is_l2 = true;
break;
default:
return -ERANGE;
}
+ if (hw->mac.type == e1000_82575) {
+ if (tsync_rx_ctl | tsync_tx_ctl)
+ return -EINVAL;
+ return 0;
+ }
+
/* enable/disable TX */
regval = rd32(E1000_TSYNCTXCTL);
- regval = (regval & ~E1000_TSYNCTXCTL_ENABLED) | tsync_tx_ctl_bit;
+ regval &= ~E1000_TSYNCTXCTL_ENABLED;
+ regval |= tsync_tx_ctl;
wr32(E1000_TSYNCTXCTL, regval);
- /* enable/disable RX, define which PTP packets are time stamped */
+ /* enable/disable RX */
regval = rd32(E1000_TSYNCRXCTL);
- regval = (regval & ~E1000_TSYNCRXCTL_ENABLED) | tsync_rx_ctl_bit;
- regval = (regval & ~0xE) | tsync_rx_ctl_type;
+ regval &= ~(E1000_TSYNCRXCTL_ENABLED | E1000_TSYNCRXCTL_TYPE_MASK);
+ regval |= tsync_rx_ctl;
wr32(E1000_TSYNCRXCTL, regval);
- wr32(E1000_TSYNCRXCFG, tsync_rx_cfg);
- /*
- * Ethertype Filter Queue Filter[0][15:0] = 0x88F7
- * (Ethertype to filter on)
- * Ethertype Filter Queue Filter[0][26] = 0x1 (Enable filter)
- * Ethertype Filter Queue Filter[0][30] = 0x1 (Enable Timestamping)
- */
- wr32(E1000_ETQF0, is_l2 ? 0x440088f7 : 0);
-
- /* L4 Queue Filter[0]: only filter by source and destination port */
- wr32(E1000_SPQF0, htons(port));
- wr32(E1000_IMIREXT(0), is_l4 ?
- ((1<<12) | (1<<19) /* bypass size and control flags */) : 0);
- wr32(E1000_IMIR(0), is_l4 ?
- (htons(port)
- | (0<<16) /* immediate interrupt disabled */
- | 0 /* (1<<17) bit cleared: do not bypass
- destination port check */)
- : 0);
- wr32(E1000_FTQF0, is_l4 ?
- (0x11 /* UDP */
- | (1<<15) /* VF not compared */
- | (1<<27) /* Enable Timestamping */
- | (7<<28) /* only source port filter enabled,
- source/target address and protocol
- masked */)
- : ((1<<15) | (15<<28) /* all mask bits set = filter not
- enabled */));
+ /* define which PTP packets are time stamped */
+ wr32(E1000_TSYNCRXCFG, tsync_rx_cfg);
+ /* define ethertype filter for timestamped packets */
+ if (is_l2)
+ wr32(E1000_ETQF(3),
+ (E1000_ETQF_FILTER_ENABLE | /* enable filter */
+ E1000_ETQF_1588 | /* enable timestamping */
+ ETH_P_1588)); /* 1588 eth protocol type */
+ 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 */
+ | E1000_FTQF_VF_BP /* VF not compared */
+ | E1000_FTQF_1588_TIME_STAMP /* Enable Timestamping */
+ | E1000_FTQF_MASK); /* mask all inputs */
+ ftqf &= ~E1000_FTQF_MASK_PROTO_BP; /* enable protocol check */
+
+ wr32(E1000_IMIR(3), htons(PTP_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));
+ ftqf &= ~E1000_FTQF_MASK_SOURCE_PORT_BP;
+ }
+ wr32(E1000_FTQF(3), ftqf);
+ } else {
+ wr32(E1000_FTQF(3), E1000_FTQF_MASK);
+ }
wrfl();
adapter->hwtstamp_config = config;
--
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