Commit 9dc7a113 authored by Matt Carlson's avatar Matt Carlson Committed by David S. Miller
Browse files

tg3: Re-inline VLAN tags when appropriate 



The tg3 driver is written so that VLAN tagged packets can be accepted,
even if CONFIG_VLAN_8021Q or CONFIG_VLAN_8021Q_MODULE is not defined.
(Think raw interfaces.)  If the device has ASF support enabled, the
firmware requires the driver to enable VLAN tag stripping.  If VLAN
tagging is not explicitly supported by the kernel and ASF is enabled,
the driver will have to reinject the VLAN tag back into the packet
stream.

Signed-off-by: default avatarMatt Carlson <mcarlson@broadcom.com>
Reviewed-by: default avatarMichael Chan <mchan@broadcom.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent d2757fc4

drivers/net/tg3.c

+33 −11
Original line number Diff line number Diff line
@@ -126,6 +126,9 @@ 
				 TG3_TX_RING_SIZE)

#define NEXT_TX(N)		(((N) + 1) & (TG3_TX_RING_SIZE - 1))



#define TG3_RX_DMA_ALIGN		16

#define TG3_RX_HEADROOM			ALIGN(VLAN_HLEN, TG3_RX_DMA_ALIGN)



#define TG3_DMA_BYTE_ENAB		64



#define TG3_RX_STD_DMA_SZ		1536
@@ -4624,6 +4627,8 @@ static int tg3_rx(struct tg3_napi *tnapi, int budget) 
		struct sk_buff *skb;

		dma_addr_t dma_addr;

		u32 opaque_key, desc_idx, *post_ptr;

		bool hw_vlan __maybe_unused = false;

		u16 vtag __maybe_unused = 0;



		desc_idx = desc->opaque & RXD_OPAQUE_INDEX_MASK;

		opaque_key = desc->opaque & RXD_OPAQUE_RING_MASK;
@@ -4682,12 +4687,12 @@ static int tg3_rx(struct tg3_napi *tnapi, int budget) 
			tg3_recycle_rx(tnapi, tpr, opaque_key,

				       desc_idx, *post_ptr);



			copy_skb = netdev_alloc_skb(tp->dev,

						    len + TG3_RAW_IP_ALIGN);

			copy_skb = netdev_alloc_skb(tp->dev, len + VLAN_HLEN +

						    TG3_RAW_IP_ALIGN);

			if (copy_skb == NULL)

				goto drop_it_no_recycle;



			skb_reserve(copy_skb, TG3_RAW_IP_ALIGN);

			skb_reserve(copy_skb, TG3_RAW_IP_ALIGN + VLAN_HLEN);

			skb_put(copy_skb, len);

			pci_dma_sync_single_for_cpu(tp->pdev, dma_addr, len, PCI_DMA_FROMDEVICE);

			skb_copy_from_linear_data(skb, copy_skb->data, len);
@@ -4713,12 +4718,29 @@ static int tg3_rx(struct tg3_napi *tnapi, int budget) 
			goto next_pkt;

		}



		if (desc->type_flags & RXD_FLAG_VLAN &&

		    !(tp->rx_mode & RX_MODE_KEEP_VLAN_TAG)) {

			vtag = desc->err_vlan & RXD_VLAN_MASK;

#if TG3_VLAN_TAG_USED

		if (tp->vlgrp != NULL &&

		    desc->type_flags & RXD_FLAG_VLAN) {

			vlan_gro_receive(&tnapi->napi, tp->vlgrp,

					 desc->err_vlan & RXD_VLAN_MASK, skb);

		} else

			if (tp->vlgrp)

				hw_vlan = true;

			else

#endif

			{

				struct vlan_ethhdr *ve = (struct vlan_ethhdr *)

						    __skb_push(skb, VLAN_HLEN);



				memmove(ve, skb->data + VLAN_HLEN,

					ETH_ALEN * 2);

				ve->h_vlan_proto = htons(ETH_P_8021Q);

				ve->h_vlan_TCI = htons(vtag);

			}

		}



#if TG3_VLAN_TAG_USED

		if (hw_vlan)

			vlan_gro_receive(&tnapi->napi, tp->vlgrp, vtag, skb);

		else

#endif

			napi_gro_receive(&tnapi->napi, skb);
@@ -13481,13 +13503,13 @@ static int __devinit tg3_get_invariants(struct tg3 *tp) 
	else

		tp->tg3_flags &= ~TG3_FLAG_POLL_SERDES;



	tp->rx_offset = NET_IP_ALIGN;

	tp->rx_offset = NET_IP_ALIGN + TG3_RX_HEADROOM;

	tp->rx_copy_thresh = TG3_RX_COPY_THRESHOLD;

	if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5701 &&

	    (tp->tg3_flags & TG3_FLAG_PCIX_MODE) != 0) {

		tp->rx_offset = 0;

		tp->rx_offset -= NET_IP_ALIGN;

#ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS

		tp->rx_copy_thresh = ~0;

		tp->rx_copy_thresh = ~(u16)0;

#endif

	}

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