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Commit f65b138c authored by Stephen Hemminger's avatar Stephen Hemminger Committed by Jeff Garzik
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[PATCH] sky2: big endian 



Fix support for big endian platforms like PPC.
Still not sure about VLAN acceleration (does it need swapping)?

Signed-off-by: default avatarStephen Hemminger <shemminger@osdl.org>
Signed-off-by: default avatarJeff Garzik <jeff@garzik.org>
parent b89165f2

drivers/net/sky2.c

+22 −21
Original line number Diff line number Diff line
@@ -827,7 +827,7 @@ static void rx_set_checksum(struct sky2_port *sky2) 
	struct sky2_rx_le *le;



	le = sky2_next_rx(sky2);

	le->addr = (ETH_HLEN << 16) | ETH_HLEN;

	le->addr = cpu_to_le32((ETH_HLEN << 16) | ETH_HLEN);

	le->ctrl = 0;

	le->opcode = OP_TCPSTART | HW_OWNER;
@@ -1245,7 +1245,7 @@ static int sky2_xmit_frame(struct sk_buff *skb, struct net_device *dev) 
	/* Send high bits if changed or crosses boundary */

	if (addr64 != sky2->tx_addr64 || high32(mapping + len) != sky2->tx_addr64) {

		le = get_tx_le(sky2);

		le->tx.addr = cpu_to_le32(addr64);

		le->addr = cpu_to_le32(addr64);

		le->ctrl = 0;

		le->opcode = OP_ADDR64 | HW_OWNER;

		sky2->tx_addr64 = high32(mapping + len);
@@ -1260,8 +1260,7 @@ static int sky2_xmit_frame(struct sk_buff *skb, struct net_device *dev) 


		if (mss != sky2->tx_last_mss) {

			le = get_tx_le(sky2);

			le->tx.tso.size = cpu_to_le16(mss);

			le->tx.tso.rsvd = 0;

			le->addr = cpu_to_le32(mss);

			le->opcode = OP_LRGLEN | HW_OWNER;

			le->ctrl = 0;

			sky2->tx_last_mss = mss;
@@ -1274,7 +1273,7 @@ static int sky2_xmit_frame(struct sk_buff *skb, struct net_device *dev) 
	if (sky2->vlgrp && vlan_tx_tag_present(skb)) {

		if (!le) {

			le = get_tx_le(sky2);

			le->tx.addr = 0;

			le->addr = 0;

			le->opcode = OP_VLAN|HW_OWNER;

			le->ctrl = 0;

		} else
@@ -1286,20 +1285,21 @@ static int sky2_xmit_frame(struct sk_buff *skb, struct net_device *dev) 


	/* Handle TCP checksum offload */

	if (skb->ip_summed == CHECKSUM_HW) {

		u16 hdr = skb->h.raw - skb->data;

		u16 offset = hdr + skb->csum;

		unsigned offset = skb->h.raw - skb->data;

		u32 tcpsum;



		tcpsum = offset << 16;		/* sum start */

		tcpsum |= offset + skb->csum;	/* sum write */



		ctrl = CALSUM | WR_SUM | INIT_SUM | LOCK_SUM;

		if (skb->nh.iph->protocol == IPPROTO_UDP)

			ctrl |= UDPTCP;



		if (hdr != sky2->tx_csum_start || offset != sky2->tx_csum_offset) {

			sky2->tx_csum_start = hdr;

			sky2->tx_csum_offset = offset;

		if (tcpsum != sky2->tx_tcpsum) {

			sky2->tx_tcpsum = tcpsum;



			le = get_tx_le(sky2);

			le->tx.csum.start = cpu_to_le16(hdr);

			le->tx.csum.offset = cpu_to_le16(offset);

			le->addr = cpu_to_le32(tcpsum);

			le->length = 0;	/* initial checksum value */

			le->ctrl = 1;	/* one packet */

			le->opcode = OP_TCPLISW | HW_OWNER;
@@ -1307,7 +1307,7 @@ static int sky2_xmit_frame(struct sk_buff *skb, struct net_device *dev) 
	}



	le = get_tx_le(sky2);

	le->tx.addr = cpu_to_le32((u32) mapping);

	le->addr = cpu_to_le32((u32) mapping);

	le->length = cpu_to_le16(len);

	le->ctrl = ctrl;

	le->opcode = mss ? (OP_LARGESEND | HW_OWNER) : (OP_PACKET | HW_OWNER);
@@ -1325,14 +1325,14 @@ static int sky2_xmit_frame(struct sk_buff *skb, struct net_device *dev) 
		addr64 = high32(mapping);

		if (addr64 != sky2->tx_addr64) {

			le = get_tx_le(sky2);

			le->tx.addr = cpu_to_le32(addr64);

			le->addr = cpu_to_le32(addr64);

			le->ctrl = 0;

			le->opcode = OP_ADDR64 | HW_OWNER;

			sky2->tx_addr64 = addr64;

		}



		le = get_tx_le(sky2);

		le->tx.addr = cpu_to_le32((u32) mapping);

		le->addr = cpu_to_le32((u32) mapping);

		le->length = cpu_to_le16(frag->size);

		le->ctrl = ctrl;

		le->opcode = OP_BUFFER | HW_OWNER;
@@ -1938,8 +1938,8 @@ static int sky2_status_intr(struct sky2_hw *hw, int to_do) 
		dev = hw->dev[le->link];



		sky2 = netdev_priv(dev);

		length = le->length;

		status = le->status;

		length = le16_to_cpu(le->length);

		status = le32_to_cpu(le->status);



		switch (le->opcode & ~HW_OWNER) {

		case OP_RXSTAT:
@@ -1983,7 +1983,7 @@ static int sky2_status_intr(struct sky2_hw *hw, int to_do) 
		case OP_RXCHKS:

			skb = sky2->rx_ring[sky2->rx_next].skb;

			skb->ip_summed = CHECKSUM_HW;

			skb->csum = le16_to_cpu(status);

			skb->csum = status & 0xffff;

			break;



		case OP_TXINDEXLE:
@@ -3286,12 +3286,13 @@ static int __devinit sky2_probe(struct pci_dev *pdev, 
	hw->pm_cap = pm_cap;



#ifdef __BIG_ENDIAN

	/* byte swap descriptors in hardware */

	/* The sk98lin vendor driver uses hardware byte swapping but

	 * this driver uses software swapping.

	 */

	{

		u32 reg;



		reg = sky2_pci_read32(hw, PCI_DEV_REG2);

		reg |= PCI_REV_DESC;

		reg &= ~PCI_REV_DESC;

		sky2_pci_write32(hw, PCI_DEV_REG2, reg);

	}

#endif

drivers/net/sky2.h

+3 −16
Original line number Diff line number Diff line
@@ -1791,21 +1791,9 @@ enum { 
	OP_TXINDEXLE	= 0x68,

};



/* Yukon 2 hardware interface

 * Not tested on big endian

 */

/* Yukon 2 hardware interface */

struct sky2_tx_le {

	union {

	__le32	addr;

		struct {

			__le16	offset;

			__le16	start;

		} csum  __attribute((packed));

		struct {

			__le16	size;

			__le16	rsvd;

		} tso  __attribute((packed));

	} tx;

	__le16	length;	/* also vlan tag or checksum start */

	u8	ctrl;

	u8	opcode;
@@ -1851,8 +1839,7 @@ struct sky2_port { 
	u32		     tx_addr64;

	u16		     tx_pending;

	u16		     tx_last_mss;

	u16		     tx_csum_start;

	u16		     tx_csum_offset;

	u32		     tx_tcpsum;



	struct ring_info     *rx_ring ____cacheline_aligned_in_smp;

	struct sky2_rx_le    *rx_le;