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authorNick Nunley <nicholasx.d.nunley@intel.com>2010-03-26 11:36:47 +0000
committerDavid S. Miller <davem@davemloft.net>2010-03-30 23:42:27 -0700
commit757b77e2b208490868cf21fd22d796eb9bd199c5 (patch)
tree628dccdbed780dc38d9843bb30d5c5920b830258
parent3365a2934cce29fa9196bc4fd7086f62e799ee84 (diff)
downloadop-kernel-dev-757b77e2b208490868cf21fd22d796eb9bd199c5.zip
op-kernel-dev-757b77e2b208490868cf21fd22d796eb9bd199c5.tar.gz
igb: add per-packet timestamping
This patch adds support for per-packet timestamping for the 82580 adapter. The rx timestamp code is also pulled out of the inlined rx hotpath and instead moved to a seperate function. This version adds a comment explaining the per-packet timestamping code added to igb_hwtstamp_ioctl(). Signed-off-by: Nicholas Nunley <nicholasx.d.nunley@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--drivers/net/igb/e1000_82575.h2
-rw-r--r--drivers/net/igb/igb.h2
-rw-r--r--drivers/net/igb/igb_main.c45
3 files changed, 41 insertions, 8 deletions
diff --git a/drivers/net/igb/e1000_82575.h b/drivers/net/igb/e1000_82575.h
index c1cad8a..cbd1e12 100644
--- a/drivers/net/igb/e1000_82575.h
+++ b/drivers/net/igb/e1000_82575.h
@@ -53,6 +53,7 @@ extern void igb_rx_fifo_flush_82575(struct e1000_hw *hw);
#define E1000_SRRCTL_DESCTYPE_ADV_ONEBUF 0x02000000
#define E1000_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS 0x0A000000
#define E1000_SRRCTL_DROP_EN 0x80000000
+#define E1000_SRRCTL_TIMESTAMP 0x40000000
#define E1000_MRQC_ENABLE_RSS_4Q 0x00000002
#define E1000_MRQC_ENABLE_VMDQ 0x00000003
@@ -109,6 +110,7 @@ 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 */
+#define E1000_RXDADV_STAT_TSIP 0x08000 /* timestamp in packet */
/* Transmit Descriptor - Advanced */
union e1000_adv_tx_desc {
diff --git a/drivers/net/igb/igb.h b/drivers/net/igb/igb.h
index a177570..4f69b6d 100644
--- a/drivers/net/igb/igb.h
+++ b/drivers/net/igb/igb.h
@@ -107,6 +107,7 @@ struct vf_data_storage {
#define MAXIMUM_ETHERNET_VLAN_SIZE 1522
/* Supported Rx Buffer Sizes */
+#define IGB_RXBUFFER_64 64 /* Used for packet split */
#define IGB_RXBUFFER_128 128 /* Used for packet split */
#define IGB_RXBUFFER_1024 1024
#define IGB_RXBUFFER_2048 2048
@@ -324,6 +325,7 @@ struct igb_adapter {
#define IGB_82576_TSYNC_SHIFT 19
#define IGB_82580_TSYNC_SHIFT 24
+#define IGB_TS_HDR_LEN 16
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 7d755dd..ea87570 100644
--- a/drivers/net/igb/igb_main.c
+++ b/drivers/net/igb/igb_main.c
@@ -2576,6 +2576,8 @@ void igb_configure_rx_ring(struct igb_adapter *adapter,
E1000_SRRCTL_BSIZEPKT_SHIFT;
srrctl |= E1000_SRRCTL_DESCTYPE_ADV_ONEBUF;
}
+ if (hw->mac.type == e1000_82580)
+ srrctl |= E1000_SRRCTL_TIMESTAMP;
/* Only set Drop Enable if we are supporting multiple queues */
if (adapter->vfs_allocated_count || adapter->num_rx_queues > 1)
srrctl |= E1000_SRRCTL_DROP_EN;
@@ -3910,6 +3912,9 @@ static int igb_change_mtu(struct net_device *netdev, int new_mtu)
* i.e. RXBUFFER_2048 --> size-4096 slab
*/
+ if (adapter->hw.mac.type == e1000_82580)
+ max_frame += IGB_TS_HDR_LEN;
+
if (max_frame <= IGB_RXBUFFER_1024)
rx_buffer_len = IGB_RXBUFFER_1024;
else if (max_frame <= MAXIMUM_ETHERNET_VLAN_SIZE)
@@ -3917,6 +3922,14 @@ static int igb_change_mtu(struct net_device *netdev, int new_mtu)
else
rx_buffer_len = IGB_RXBUFFER_128;
+ if ((max_frame == ETH_FRAME_LEN + ETH_FCS_LEN + IGB_TS_HDR_LEN) ||
+ (max_frame == MAXIMUM_ETHERNET_VLAN_SIZE + IGB_TS_HDR_LEN))
+ rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE + IGB_TS_HDR_LEN;
+
+ if ((adapter->hw.mac.type == e1000_82580) &&
+ (rx_buffer_len == IGB_RXBUFFER_128))
+ rx_buffer_len += IGB_RXBUFFER_64;
+
if (netif_running(netdev))
igb_down(adapter);
@@ -5133,7 +5146,7 @@ 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,
+static void igb_rx_hwtstamp(struct igb_q_vector *q_vector, u32 staterr,
struct sk_buff *skb)
{
struct igb_adapter *adapter = q_vector->adapter;
@@ -5151,13 +5164,18 @@ static inline void igb_rx_hwtstamp(struct igb_q_vector *q_vector, u32 staterr,
* 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;
+ if (staterr & E1000_RXDADV_STAT_TSIP) {
+ u32 *stamp = (u32 *)skb->data;
+ regval = le32_to_cpu(*(stamp + 2));
+ regval |= (u64)le32_to_cpu(*(stamp + 3)) << 32;
+ skb_pull(skb, IGB_TS_HDR_LEN);
+ } else {
+ if(!(rd32(E1000_TSYNCRXCTL) & E1000_TSYNCRXCTL_VALID))
+ return;
- regval = rd32(E1000_RXSTMPL);
- regval |= (u64)rd32(E1000_RXSTMPH) << 32;
+ regval = rd32(E1000_RXSTMPL);
+ regval |= (u64)rd32(E1000_RXSTMPH) << 32;
+ }
igb_systim_to_hwtstamp(adapter, skb_hwtstamps(skb), regval);
}
@@ -5265,7 +5283,8 @@ send_up:
goto next_desc;
}
- igb_rx_hwtstamp(q_vector, staterr, skb);
+ if (staterr & (E1000_RXDADV_STAT_TSIP | E1000_RXDADV_STAT_TS))
+ igb_rx_hwtstamp(q_vector, staterr, skb);
total_bytes += skb->len;
total_packets++;
@@ -5545,6 +5564,16 @@ static int igb_hwtstamp_ioctl(struct net_device *netdev,
return 0;
}
+ /*
+ * Per-packet timestamping only works if all packets are
+ * timestamped, so enable timestamping in all packets as
+ * 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;
+ }
+
/* enable/disable TX */
regval = rd32(E1000_TSYNCTXCTL);
regval &= ~E1000_TSYNCTXCTL_ENABLED;
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