Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/net-next

Jeff Kirsher says:

====================
Intel Wired LAN Driver Updates 2015-01-22

This series contains updates to e1000, e1000e, igb, fm10k and virtio_net.

Asaf Vertz provides a fix for e1000 to future-proof the time comparisons
by using time_after_eq() instead of plain math.

Mathias Koehrer provides a fix for e1000e to add a check to e1000_xmit_frame()
to ensure a work queue will not be scheduled that has not been initialized.

Jacob adds the use of software timestamping via the virtio_net driver.

Alex Duyck cleans up page reuse code in igb and fm10k.  Cleans up the
page reuse code from getting into a state where all the workarounds
needed are in place as well as cleaning up oversights, such as using
__free_pages instead of put_page to drop a locally allocated page.

Richard Cochran provides 4 patches for igb dealing with time sync.
First provides a helper function since the code that handles the time
sync interrupt is repeated in three different places.  Then serializes
the access to the time sync interrupt since the registers may be
manipulated from different contexts.  Enables the use of i210 device
interrupt to generate an internal PPS event for adjusting the kernel
system time.  The i210 device offers a number of special PTP hardware
clock features on the Software Defined Pins (SDPs), so added support for
two of the possible functions (time stamping external events and
periodic output signals).

Or Gerlitz fixes fm10k from double setting of NETIF_F_SG since the
networking core does it for the driver during registration time.

Joe Stringer adds support for up to 104 bytes of inner+outer headers in
fm10k and adds an initial check to fail encapsulation offload if these
are too large.

Matthew increases the timeout for the data path reset based on feedback
from the hardware team, since 100us is too short of a time to wait for
the data path reset to complete.

Alexander Graf provides a fix for igb to indicate failure on VF reset
for an empty MAC address, to mirror the behavior of ixgbe.

Florian Westphal updates e1000 and e1000e to support txtd update delay
via xmit_more, this way we won't update the Tx tail descriptor if the
queue has not been stopped and we know at least one more skb will be
sent right away.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 102 insertions, 51 deletions

diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c
index 6c25ec314183..f366b3b96d03 100644
--- a/drivers/net/ethernet/intel/igb/igb_main.c
+++ b/drivers/net/ethernet/intel/igb/igb_main.c
@@ -5384,6 +5384,80 @@ void igb_update_stats(struct igb_adapter *adapter,
 	}
 }
 
+static void igb_tsync_interrupt(struct igb_adapter *adapter)
+{
+	struct e1000_hw *hw = &adapter->hw;
+	struct ptp_clock_event event;
+	struct timespec ts;
+	u32 ack = 0, tsauxc, sec, nsec, tsicr = rd32(E1000_TSICR);
+
+	if (tsicr & TSINTR_SYS_WRAP) {
+		event.type = PTP_CLOCK_PPS;
+		if (adapter->ptp_caps.pps)
+			ptp_clock_event(adapter->ptp_clock, &event);
+		else
+			dev_err(&adapter->pdev->dev, "unexpected SYS WRAP");
+		ack |= TSINTR_SYS_WRAP;
+	}
+
+	if (tsicr & E1000_TSICR_TXTS) {
+		/* retrieve hardware timestamp */
+		schedule_work(&adapter->ptp_tx_work);
+		ack |= E1000_TSICR_TXTS;
+	}
+
+	if (tsicr & TSINTR_TT0) {
+		spin_lock(&adapter->tmreg_lock);
+		ts = timespec_add(adapter->perout[0].start,
+				  adapter->perout[0].period);
+		wr32(E1000_TRGTTIML0, ts.tv_nsec);
+		wr32(E1000_TRGTTIMH0, ts.tv_sec);
+		tsauxc = rd32(E1000_TSAUXC);
+		tsauxc |= TSAUXC_EN_TT0;
+		wr32(E1000_TSAUXC, tsauxc);
+		adapter->perout[0].start = ts;
+		spin_unlock(&adapter->tmreg_lock);
+		ack |= TSINTR_TT0;
+	}
+
+	if (tsicr & TSINTR_TT1) {
+		spin_lock(&adapter->tmreg_lock);
+		ts = timespec_add(adapter->perout[1].start,
+				  adapter->perout[1].period);
+		wr32(E1000_TRGTTIML1, ts.tv_nsec);
+		wr32(E1000_TRGTTIMH1, ts.tv_sec);
+		tsauxc = rd32(E1000_TSAUXC);
+		tsauxc |= TSAUXC_EN_TT1;
+		wr32(E1000_TSAUXC, tsauxc);
+		adapter->perout[1].start = ts;
+		spin_unlock(&adapter->tmreg_lock);
+		ack |= TSINTR_TT1;
+	}
+
+	if (tsicr & TSINTR_AUTT0) {
+		nsec = rd32(E1000_AUXSTMPL0);
+		sec  = rd32(E1000_AUXSTMPH0);
+		event.type = PTP_CLOCK_EXTTS;
+		event.index = 0;
+		event.timestamp = sec * 1000000000ULL + nsec;
+		ptp_clock_event(adapter->ptp_clock, &event);
+		ack |= TSINTR_AUTT0;
+	}
+
+	if (tsicr & TSINTR_AUTT1) {
+		nsec = rd32(E1000_AUXSTMPL1);
+		sec  = rd32(E1000_AUXSTMPH1);
+		event.type = PTP_CLOCK_EXTTS;
+		event.index = 1;
+		event.timestamp = sec * 1000000000ULL + nsec;
+		ptp_clock_event(adapter->ptp_clock, &event);
+		ack |= TSINTR_AUTT1;
+	}
+
+	/* acknowledge the interrupts */
+	wr32(E1000_TSICR, ack);
+}
+
 static irqreturn_t igb_msix_other(int irq, void *data)
 {
 	struct igb_adapter *adapter = data;
@@ -5415,16 +5489,8 @@ static irqreturn_t igb_msix_other(int irq, void *data)
 			mod_timer(&adapter->watchdog_timer, jiffies + 1);
 	}
 
-	if (icr & E1000_ICR_TS) {
-		u32 tsicr = rd32(E1000_TSICR);
-
-		if (tsicr & E1000_TSICR_TXTS) {
-			/* acknowledge the interrupt */
-			wr32(E1000_TSICR, E1000_TSICR_TXTS);
-			/* retrieve hardware timestamp */
-			schedule_work(&adapter->ptp_tx_work);
-		}
-	}
+	if (icr & E1000_ICR_TS)
+		igb_tsync_interrupt(adapter);
 
 	wr32(E1000_EIMS, adapter->eims_other);
 
@@ -6011,8 +6077,12 @@ static void igb_vf_reset_msg(struct igb_adapter *adapter, u32 vf)
 	adapter->vf_data[vf].flags |= IGB_VF_FLAG_CTS;
 
 	/* reply to reset with ack and vf mac address */
-	msgbuf[0] = E1000_VF_RESET | E1000_VT_MSGTYPE_ACK;
-	memcpy(addr, vf_mac, ETH_ALEN);
+	if (!is_zero_ether_addr(vf_mac)) {
+		msgbuf[0] = E1000_VF_RESET | E1000_VT_MSGTYPE_ACK;
+		memcpy(addr, vf_mac, ETH_ALEN);
+	} else {
+		msgbuf[0] = E1000_VF_RESET | E1000_VT_MSGTYPE_NACK;
+	}
 	igb_write_mbx(hw, msgbuf, 3, vf);
 }
 
@@ -6203,16 +6273,8 @@ static irqreturn_t igb_intr_msi(int irq, void *data)
 			mod_timer(&adapter->watchdog_timer, jiffies + 1);
 	}
 
-	if (icr & E1000_ICR_TS) {
-		u32 tsicr = rd32(E1000_TSICR);
-
-		if (tsicr & E1000_TSICR_TXTS) {
-			/* acknowledge the interrupt */
-			wr32(E1000_TSICR, E1000_TSICR_TXTS);
-			/* retrieve hardware timestamp */
-			schedule_work(&adapter->ptp_tx_work);
-		}
-	}
+	if (icr & E1000_ICR_TS)
+		igb_tsync_interrupt(adapter);
 
 	napi_schedule(&q_vector->napi);
 
@@ -6257,16 +6319,8 @@ static irqreturn_t igb_intr(int irq, void *data)
 			mod_timer(&adapter->watchdog_timer, jiffies + 1);
 	}
 
-	if (icr & E1000_ICR_TS) {
-		u32 tsicr = rd32(E1000_TSICR);
-
-		if (tsicr & E1000_TSICR_TXTS) {
-			/* acknowledge the interrupt */
-			wr32(E1000_TSICR, E1000_TSICR_TXTS);
-			/* retrieve hardware timestamp */
-			schedule_work(&adapter->ptp_tx_work);
-		}
-	}
+	if (icr & E1000_ICR_TS)
+		igb_tsync_interrupt(adapter);
 
 	napi_schedule(&q_vector->napi);
 
@@ -6527,15 +6581,17 @@ static void igb_reuse_rx_page(struct igb_ring *rx_ring,
 					 DMA_FROM_DEVICE);
 }
 
+static inline bool igb_page_is_reserved(struct page *page)
+{
+	return (page_to_nid(page) != numa_mem_id()) || page->pfmemalloc;
+}
+
 static bool igb_can_reuse_rx_page(struct igb_rx_buffer *rx_buffer,
 				  struct page *page,
 				  unsigned int truesize)
 {
 	/* avoid re-using remote pages */
-	if (unlikely(page_to_nid(page) != numa_node_id()))
-		return false;
-
-	if (unlikely(page->pfmemalloc))
+	if (unlikely(igb_page_is_reserved(page)))
 		return false;
 
 #if (PAGE_SIZE < 8192)
@@ -6545,22 +6601,19 @@ static bool igb_can_reuse_rx_page(struct igb_rx_buffer *rx_buffer,
 
 	/* flip page offset to other buffer */
 	rx_buffer->page_offset ^= IGB_RX_BUFSZ;
-
-	/* Even if we own the page, we are not allowed to use atomic_set()
-	 * This would break get_page_unless_zero() users.
-	 */
-	atomic_inc(&page->_count);
 #else
 	/* move offset up to the next cache line */
 	rx_buffer->page_offset += truesize;
 
 	if (rx_buffer->page_offset > (PAGE_SIZE - IGB_RX_BUFSZ))
 		return false;
-
-	/* bump ref count on page before it is given to the stack */
-	get_page(page);
 #endif
 
+	/* Even if we own the page, we are not allowed to use atomic_set()
+	 * This would break get_page_unless_zero() users.
+	 */
+	atomic_inc(&page->_count);
+
 	return true;
 }
 
@@ -6603,13 +6656,12 @@ static bool igb_add_rx_frag(struct igb_ring *rx_ring,
 
 		memcpy(__skb_put(skb, size), va, ALIGN(size, sizeof(long)));
 
-		/* we can reuse buffer as-is, just make sure it is local */
-		if (likely((page_to_nid(page) == numa_node_id()) &&
-			   !page->pfmemalloc))
+		/* page is not reserved, we can reuse buffer as-is */
+		if (likely(!igb_page_is_reserved(page)))
 			return true;
 
 		/* this page cannot be reused so discard it */
-		put_page(page);
+		__free_page(page);
 		return false;
 	}
 
@@ -6627,7 +6679,6 @@ static struct sk_buff *igb_fetch_rx_buffer(struct igb_ring *rx_ring,
 	struct page *page;
 
 	rx_buffer = &rx_ring->rx_buffer_info[rx_ring->next_to_clean];
-
 	page = rx_buffer->page;
 	prefetchw(page);
 
@@ -7042,8 +7093,8 @@ void igb_alloc_rx_buffers(struct igb_ring *rx_ring, u16 cleaned_count)
 			i -= rx_ring->count;
 		}
 
-		/* clear the hdr_addr for the next_to_use descriptor */
-		rx_desc->read.hdr_addr = 0;
+		/* clear the status bits for the next_to_use descriptor */
+		rx_desc->wb.upper.status_error = 0;
 
 		cleaned_count--;
 	} while (cleaned_count);