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Commit 60eea6cf authored by Paul Gortmaker's avatar Paul Gortmaker
Browse files

atm: remove the coupling to token ring support 



The token ring support is going away, so decouple
the atm support from it in advance.

Signed-off-by: default avatarPaul Gortmaker <paul.gortmaker@windriver.com>
parent 1abd2296

include/linux/atmlec.h

+0 −7
Original line number Diff line number Diff line
@@ -21,13 +21,6 @@ 
/* Maximum number of LEC interfaces (tweakable) */

#define MAX_LEC_ITF 48



/*

 * From the total of MAX_LEC_ITF, last NUM_TR_DEVS are reserved for Token Ring.

 * E.g. if MAX_LEC_ITF = 48 and NUM_TR_DEVS = 8, then lec0-lec39 are for

 * Ethernet ELANs and lec40-lec47 are for Token Ring ELANS.

 */

#define NUM_TR_DEVS 8



typedef enum {

	l_set_mac_addr,

	l_del_mac_addr,

net/atm/lec.c

+8 −130
Original line number Diff line number Diff line
@@ -26,11 +26,6 @@ 
#include <linux/spinlock.h>

#include <linux/seq_file.h>



/* TokenRing if needed */

#ifdef CONFIG_TR

#include <linux/trdevice.h>

#endif



/* And atm device */

#include <linux/atmdev.h>

#include <linux/atmlec.h>
@@ -162,50 +157,6 @@ static void lec_handle_bridge(struct sk_buff *skb, struct net_device *dev) 
}

#endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */



/*

 * Modelled after tr_type_trans

 * All multicast and ARE or STE frames go to BUS.

 * Non source routed frames go by destination address.

 * Last hop source routed frames go by destination address.

 * Not last hop source routed frames go by _next_ route descriptor.

 * Returns pointer to destination MAC address or fills in rdesc

 * and returns NULL.

 */

#ifdef CONFIG_TR

static unsigned char *get_tr_dst(unsigned char *packet, unsigned char *rdesc)

{

	struct trh_hdr *trh;

	unsigned int riflen, num_rdsc;



	trh = (struct trh_hdr *)packet;

	if (trh->daddr[0] & (uint8_t) 0x80)

		return bus_mac;	/* multicast */



	if (trh->saddr[0] & TR_RII) {

		riflen = (ntohs(trh->rcf) & TR_RCF_LEN_MASK) >> 8;

		if ((ntohs(trh->rcf) >> 13) != 0)

			return bus_mac;	/* ARE or STE */

	} else

		return trh->daddr;	/* not source routed */



	if (riflen < 6)

		return trh->daddr;	/* last hop, source routed */



	/* riflen is 6 or more, packet has more than one route descriptor */

	num_rdsc = (riflen / 2) - 1;

	memset(rdesc, 0, ETH_ALEN);

	/* offset 4 comes from LAN destination field in LE control frames */

	if (trh->rcf & htons((uint16_t) TR_RCF_DIR_BIT))

		memcpy(&rdesc[4], &trh->rseg[num_rdsc - 2], sizeof(__be16));

	else {

		memcpy(&rdesc[4], &trh->rseg[1], sizeof(__be16));

		rdesc[5] = ((ntohs(trh->rseg[0]) & 0x000f) | (rdesc[5] & 0xf0));

	}



	return NULL;

}

#endif /* CONFIG_TR */



/*

 * Open/initialize the netdevice. This is called (in the current kernel)

 * sometime after booting when the 'ifconfig' program is run.
@@ -257,9 +208,6 @@ static netdev_tx_t lec_start_xmit(struct sk_buff *skb, 
	struct lec_arp_table *entry;

	unsigned char *dst;

	int min_frame_size;

#ifdef CONFIG_TR

	unsigned char rdesc[ETH_ALEN];	/* Token Ring route descriptor */

#endif

	int is_rdesc;



	pr_debug("called\n");
@@ -290,24 +238,10 @@ static netdev_tx_t lec_start_xmit(struct sk_buff *skb, 
	}

	skb_push(skb, 2);



	/* Put le header to place, works for TokenRing too */

	/* Put le header to place */

	lec_h = (struct lecdatahdr_8023 *)skb->data;

	lec_h->le_header = htons(priv->lecid);



#ifdef CONFIG_TR

	/*

	 * Ugly. Use this to realign Token Ring packets for

	 * e.g. PCA-200E driver.

	 */

	if (priv->is_trdev) {

		skb2 = skb_realloc_headroom(skb, LEC_HEADER_LEN);

		kfree_skb(skb);

		if (skb2 == NULL)

			return NETDEV_TX_OK;

		skb = skb2;

	}

#endif



#if DUMP_PACKETS >= 2

#define MAX_DUMP_SKB 99

#elif DUMP_PACKETS >= 1
@@ -321,11 +255,6 @@ static netdev_tx_t lec_start_xmit(struct sk_buff *skb, 
#endif /* DUMP_PACKETS >= 1 */



	/* Minimum ethernet-frame size */

#ifdef CONFIG_TR

	if (priv->is_trdev)

		min_frame_size = LEC_MINIMUM_8025_SIZE;

	else

#endif

	min_frame_size = LEC_MINIMUM_8023_SIZE;

	if (skb->len < min_frame_size) {

		if ((skb->len + skb_tailroom(skb)) < min_frame_size) {
@@ -345,15 +274,6 @@ static netdev_tx_t lec_start_xmit(struct sk_buff *skb, 
	/* Send to right vcc */

	is_rdesc = 0;

	dst = lec_h->h_dest;

#ifdef CONFIG_TR

	if (priv->is_trdev) {

		dst = get_tr_dst(skb->data + 2, rdesc);

		if (dst == NULL) {

			dst = rdesc;

			is_rdesc = 1;

		}

	}

#endif

	entry = NULL;

	vcc = lec_arp_resolve(priv, dst, is_rdesc, &entry);

	pr_debug("%s:vcc:%p vcc_flags:%lx, entry:%p\n",
@@ -710,11 +630,6 @@ static void lec_push(struct atm_vcc *vcc, struct sk_buff *skb) 
			dev_kfree_skb(skb);

			return;

		}

#ifdef CONFIG_TR

		if (priv->is_trdev)

			dst = ((struct lecdatahdr_8025 *)skb->data)->h_dest;

		else

#endif

		dst = ((struct lecdatahdr_8023 *)skb->data)->h_dest;



		/*
@@ -723,16 +638,7 @@ static void lec_push(struct atm_vcc *vcc, struct sk_buff *skb) 
		 */

		spin_lock_irqsave(&priv->lec_arp_lock, flags);

		if (lec_is_data_direct(vcc)) {

#ifdef CONFIG_TR

			if (priv->is_trdev)

				src =

				    ((struct lecdatahdr_8025 *)skb->data)->

				    h_source;

			else

#endif

				src =

				    ((struct lecdatahdr_8023 *)skb->data)->

				    h_source;

			src = ((struct lecdatahdr_8023 *)skb->data)->h_source;

			entry = lec_arp_find(priv, src);

			if (entry && entry->vcc != vcc) {

				lec_arp_remove(priv, entry);
@@ -750,11 +656,6 @@ static void lec_push(struct atm_vcc *vcc, struct sk_buff *skb) 
		if (!hlist_empty(&priv->lec_arp_empty_ones))

			lec_arp_check_empties(priv, vcc, skb);

		skb_pull(skb, 2);	/* skip lec_id */

#ifdef CONFIG_TR

		if (priv->is_trdev)

			skb->protocol = tr_type_trans(skb, dev);

		else

#endif

		skb->protocol = eth_type_trans(skb, dev);

		dev->stats.rx_packets++;

		dev->stats.rx_bytes += skb->len;
@@ -827,26 +728,12 @@ static int lecd_attach(struct atm_vcc *vcc, int arg) 
		i = 0;

	else

		i = arg;

#ifdef CONFIG_TR

	if (arg >= MAX_LEC_ITF)

		return -EINVAL;

#else				/* Reserve the top NUM_TR_DEVS for TR */

	if (arg >= (MAX_LEC_ITF - NUM_TR_DEVS))

		return -EINVAL;

#endif

	if (!dev_lec[i]) {

		int is_trdev, size;



		is_trdev = 0;

		if (i >= (MAX_LEC_ITF - NUM_TR_DEVS))

			is_trdev = 1;

		int size;



		size = sizeof(struct lec_priv);

#ifdef CONFIG_TR

		if (is_trdev)

			dev_lec[i] = alloc_trdev(size);

		else

#endif

		dev_lec[i] = alloc_etherdev(size);

		if (!dev_lec[i])

			return -ENOMEM;
@@ -858,7 +745,6 @@ static int lecd_attach(struct atm_vcc *vcc, int arg) 
		}



		priv = netdev_priv(dev_lec[i]);

		priv->is_trdev = is_trdev;

	} else {

		priv = netdev_priv(dev_lec[i]);

		if (priv->lecd)
@@ -2372,15 +2258,7 @@ lec_arp_check_empties(struct lec_priv *priv, 
	struct hlist_node *node, *next;

	struct lec_arp_table *entry, *tmp;

	struct lecdatahdr_8023 *hdr = (struct lecdatahdr_8023 *)skb->data;

	unsigned char *src;

#ifdef CONFIG_TR

	struct lecdatahdr_8025 *tr_hdr = (struct lecdatahdr_8025 *)skb->data;



	if (priv->is_trdev)

		src = tr_hdr->h_source;

	else

#endif

		src = hdr->h_source;

	unsigned char *src = hdr->h_source;



	spin_lock_irqsave(&priv->lec_arp_lock, flags);

	hlist_for_each_entry_safe(entry, node, next,

net/atm/lec.h

+0 −1
Original line number Diff line number Diff line
@@ -142,7 +142,6 @@ struct lec_priv { 
	int itfnum;				/* e.g. 2 for lec2, 5 for lec5 */

	struct lane2_ops *lane2_ops;		/* can be NULL for LANE v1 */

	int is_proxy;				/* bridge between ATM and Ethernet */

	int is_trdev;				/* Device type, 0 = Ethernet, 1 = TokenRing */

};



struct lec_vcc_priv {