Merge branch 'irda-move-to-staging'

Greg Kroah-Hartman says:

====================
irda: move it to drivers/staging so we can delete it

The IRDA code has long been obsolete and broken.  So, to keep people
from trying to use it, and to prevent people from having to maintain it,
let's move it to drivers/staging/ so that we can delete it entirely from
the kernel in a few releases.
====================

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

1 files changed, 476 insertions, 0 deletions

diff --git a/drivers/staging/irda/net/irlmp_frame.c b/drivers/staging/irda/net/irlmp_frame.c
new file mode 100644
index 000000000000..38b0f994bc7b
--- /dev/null
+++ b/drivers/staging/irda/net/irlmp_frame.c
@@ -0,0 +1,476 @@
+/*********************************************************************
+ *
+ * Filename:      irlmp_frame.c
+ * Version:       0.9
+ * Description:   IrLMP frame implementation
+ * Status:        Experimental.
+ * Author:        Dag Brattli <dagb@cs.uit.no>
+ * Created at:    Tue Aug 19 02:09:59 1997
+ * Modified at:   Mon Dec 13 13:41:12 1999
+ * Modified by:   Dag Brattli <dagb@cs.uit.no>
+ *
+ *     Copyright (c) 1998-1999 Dag Brattli <dagb@cs.uit.no>
+ *     All Rights Reserved.
+ *     Copyright (c) 2000-2003 Jean Tourrilhes <jt@hpl.hp.com>
+ *
+ *     This program is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU General Public License as
+ *     published by the Free Software Foundation; either version 2 of
+ *     the License, or (at your option) any later version.
+ *
+ *     Neither Dag Brattli nor University of Tromsø admit liability nor
+ *     provide warranty for any of this software. This material is
+ *     provided "AS-IS" and at no charge.
+ *
+ ********************************************************************/
+
+#include <linux/skbuff.h>
+#include <linux/kernel.h>
+
+#include <net/irda/irda.h>
+#include <net/irda/irlap.h>
+#include <net/irda/timer.h>
+#include <net/irda/irlmp.h>
+#include <net/irda/irlmp_frame.h>
+#include <net/irda/discovery.h>
+
+static struct lsap_cb *irlmp_find_lsap(struct lap_cb *self, __u8 dlsap,
+				       __u8 slsap, int status, hashbin_t *);
+
+inline void irlmp_send_data_pdu(struct lap_cb *self, __u8 dlsap, __u8 slsap,
+				int expedited, struct sk_buff *skb)
+{
+	skb->data[0] = dlsap;
+	skb->data[1] = slsap;
+
+	if (expedited) {
+		pr_debug("%s(), sending expedited data\n", __func__);
+		irlap_data_request(self->irlap, skb, TRUE);
+	} else
+		irlap_data_request(self->irlap, skb, FALSE);
+}
+
+/*
+ * Function irlmp_send_lcf_pdu (dlsap, slsap, opcode,skb)
+ *
+ *    Send Link Control Frame to IrLAP
+ */
+void irlmp_send_lcf_pdu(struct lap_cb *self, __u8 dlsap, __u8 slsap,
+			__u8 opcode, struct sk_buff *skb)
+{
+	__u8 *frame;
+
+	IRDA_ASSERT(self != NULL, return;);
+	IRDA_ASSERT(self->magic == LMP_LAP_MAGIC, return;);
+	IRDA_ASSERT(skb != NULL, return;);
+
+	frame = skb->data;
+
+	frame[0] = dlsap | CONTROL_BIT;
+	frame[1] = slsap;
+
+	frame[2] = opcode;
+
+	if (opcode == DISCONNECT)
+		frame[3] = 0x01; /* Service user request */
+	else
+		frame[3] = 0x00; /* rsvd */
+
+	irlap_data_request(self->irlap, skb, FALSE);
+}
+
+/*
+ * Function irlmp_input (skb)
+ *
+ *    Used by IrLAP to pass received data frames to IrLMP layer
+ *
+ */
+void irlmp_link_data_indication(struct lap_cb *self, struct sk_buff *skb,
+				int unreliable)
+{
+	struct lsap_cb *lsap;
+	__u8   slsap_sel;   /* Source (this) LSAP address */
+	__u8   dlsap_sel;   /* Destination LSAP address */
+	__u8   *fp;
+
+	IRDA_ASSERT(self != NULL, return;);
+	IRDA_ASSERT(self->magic == LMP_LAP_MAGIC, return;);
+	IRDA_ASSERT(skb->len > 2, return;);
+
+	fp = skb->data;
+
+	/*
+	 *  The next statements may be confusing, but we do this so that
+	 *  destination LSAP of received frame is source LSAP in our view
+	 */
+	slsap_sel = fp[0] & LSAP_MASK;
+	dlsap_sel = fp[1];
+
+	/*
+	 *  Check if this is an incoming connection, since we must deal with
+	 *  it in a different way than other established connections.
+	 */
+	if ((fp[0] & CONTROL_BIT) && (fp[2] == CONNECT_CMD)) {
+		pr_debug("%s(), incoming connection, source LSAP=%d, dest LSAP=%d\n",
+			 __func__, slsap_sel, dlsap_sel);
+
+		/* Try to find LSAP among the unconnected LSAPs */
+		lsap = irlmp_find_lsap(self, dlsap_sel, slsap_sel, CONNECT_CMD,
+				       irlmp->unconnected_lsaps);
+
+		/* Maybe LSAP was already connected, so try one more time */
+		if (!lsap) {
+			pr_debug("%s(), incoming connection for LSAP already connected\n",
+				 __func__);
+			lsap = irlmp_find_lsap(self, dlsap_sel, slsap_sel, 0,
+					       self->lsaps);
+		}
+	} else
+		lsap = irlmp_find_lsap(self, dlsap_sel, slsap_sel, 0,
+				       self->lsaps);
+
+	if (lsap == NULL) {
+		pr_debug("IrLMP, Sorry, no LSAP for received frame!\n");
+		pr_debug("%s(), slsap_sel = %02x, dlsap_sel = %02x\n",
+			 __func__, slsap_sel, dlsap_sel);
+		if (fp[0] & CONTROL_BIT) {
+			pr_debug("%s(), received control frame %02x\n",
+				 __func__, fp[2]);
+		} else {
+			pr_debug("%s(), received data frame\n", __func__);
+		}
+		return;
+	}
+
+	/*
+	 *  Check if we received a control frame?
+	 */
+	if (fp[0] & CONTROL_BIT) {
+		switch (fp[2]) {
+		case CONNECT_CMD:
+			lsap->lap = self;
+			irlmp_do_lsap_event(lsap, LM_CONNECT_INDICATION, skb);
+			break;
+		case CONNECT_CNF:
+			irlmp_do_lsap_event(lsap, LM_CONNECT_CONFIRM, skb);
+			break;
+		case DISCONNECT:
+			pr_debug("%s(), Disconnect indication!\n",
+				 __func__);
+			irlmp_do_lsap_event(lsap, LM_DISCONNECT_INDICATION,
+					    skb);
+			break;
+		case ACCESSMODE_CMD:
+			pr_debug("Access mode cmd not implemented!\n");
+			break;
+		case ACCESSMODE_CNF:
+			pr_debug("Access mode cnf not implemented!\n");
+			break;
+		default:
+			pr_debug("%s(), Unknown control frame %02x\n",
+				 __func__, fp[2]);
+			break;
+		}
+	} else if (unreliable) {
+		/* Optimize and bypass the state machine if possible */
+		if (lsap->lsap_state == LSAP_DATA_TRANSFER_READY)
+			irlmp_udata_indication(lsap, skb);
+		else
+			irlmp_do_lsap_event(lsap, LM_UDATA_INDICATION, skb);
+	} else {
+		/* Optimize and bypass the state machine if possible */
+		if (lsap->lsap_state == LSAP_DATA_TRANSFER_READY)
+			irlmp_data_indication(lsap, skb);
+		else
+			irlmp_do_lsap_event(lsap, LM_DATA_INDICATION, skb);
+	}
+}
+
+/*
+ * Function irlmp_link_unitdata_indication (self, skb)
+ *
+ *
+ *
+ */
+#ifdef CONFIG_IRDA_ULTRA
+void irlmp_link_unitdata_indication(struct lap_cb *self, struct sk_buff *skb)
+{
+	struct lsap_cb *lsap;
+	__u8   slsap_sel;   /* Source (this) LSAP address */
+	__u8   dlsap_sel;   /* Destination LSAP address */
+	__u8   pid;         /* Protocol identifier */
+	__u8   *fp;
+	unsigned long flags;
+
+	IRDA_ASSERT(self != NULL, return;);
+	IRDA_ASSERT(self->magic == LMP_LAP_MAGIC, return;);
+	IRDA_ASSERT(skb->len > 2, return;);
+
+	fp = skb->data;
+
+	/*
+	 *  The next statements may be confusing, but we do this so that
+	 *  destination LSAP of received frame is source LSAP in our view
+	 */
+	slsap_sel = fp[0] & LSAP_MASK;
+	dlsap_sel = fp[1];
+	pid       = fp[2];
+
+	if (pid & 0x80) {
+		pr_debug("%s(), extension in PID not supp!\n",
+			 __func__);
+		return;
+	}
+
+	/* Check if frame is addressed to the connectionless LSAP */
+	if ((slsap_sel != LSAP_CONNLESS) || (dlsap_sel != LSAP_CONNLESS)) {
+		pr_debug("%s(), dropping frame!\n", __func__);
+		return;
+	}
+
+	/* Search the connectionless LSAP */
+	spin_lock_irqsave(&irlmp->unconnected_lsaps->hb_spinlock, flags);
+	lsap = (struct lsap_cb *) hashbin_get_first(irlmp->unconnected_lsaps);
+	while (lsap != NULL) {
+		/*
+		 *  Check if source LSAP and dest LSAP selectors and PID match.
+		 */
+		if ((lsap->slsap_sel == slsap_sel) &&
+		    (lsap->dlsap_sel == dlsap_sel) &&
+		    (lsap->pid == pid))
+		{
+			break;
+		}
+		lsap = (struct lsap_cb *) hashbin_get_next(irlmp->unconnected_lsaps);
+	}
+	spin_unlock_irqrestore(&irlmp->unconnected_lsaps->hb_spinlock, flags);
+
+	if (lsap)
+		irlmp_connless_data_indication(lsap, skb);
+	else {
+		pr_debug("%s(), found no matching LSAP!\n", __func__);
+	}
+}
+#endif /* CONFIG_IRDA_ULTRA */
+
+/*
+ * Function irlmp_link_disconnect_indication (reason, userdata)
+ *
+ *    IrLAP has disconnected
+ *
+ */
+void irlmp_link_disconnect_indication(struct lap_cb *lap,
+				      struct irlap_cb *irlap,
+				      LAP_REASON reason,
+				      struct sk_buff *skb)
+{
+	IRDA_ASSERT(lap != NULL, return;);
+	IRDA_ASSERT(lap->magic == LMP_LAP_MAGIC, return;);
+
+	lap->reason = reason;
+	lap->daddr = DEV_ADDR_ANY;
+
+	/* FIXME: must do something with the skb if any */
+
+	/*
+	 *  Inform station state machine
+	 */
+	irlmp_do_lap_event(lap, LM_LAP_DISCONNECT_INDICATION, NULL);
+}
+
+/*
+ * Function irlmp_link_connect_indication (qos)
+ *
+ *    Incoming LAP connection!
+ *
+ */
+void irlmp_link_connect_indication(struct lap_cb *self, __u32 saddr,
+				   __u32 daddr, struct qos_info *qos,
+				   struct sk_buff *skb)
+{
+	/* Copy QoS settings for this session */
+	self->qos = qos;
+
+	/* Update destination device address */
+	self->daddr = daddr;
+	IRDA_ASSERT(self->saddr == saddr, return;);
+
+	irlmp_do_lap_event(self, LM_LAP_CONNECT_INDICATION, skb);
+}
+
+/*
+ * Function irlmp_link_connect_confirm (qos)
+ *
+ *    LAP connection confirmed!
+ *
+ */
+void irlmp_link_connect_confirm(struct lap_cb *self, struct qos_info *qos,
+				struct sk_buff *skb)
+{
+	IRDA_ASSERT(self != NULL, return;);
+	IRDA_ASSERT(self->magic == LMP_LAP_MAGIC, return;);
+	IRDA_ASSERT(qos != NULL, return;);
+
+	/* Don't need use the skb for now */
+
+	/* Copy QoS settings for this session */
+	self->qos = qos;
+
+	irlmp_do_lap_event(self, LM_LAP_CONNECT_CONFIRM, NULL);
+}
+
+/*
+ * Function irlmp_link_discovery_indication (self, log)
+ *
+ *    Device is discovering us
+ *
+ * It's not an answer to our own discoveries, just another device trying
+ * to perform discovery, but we don't want to miss the opportunity
+ * to exploit this information, because :
+ *	o We may not actively perform discovery (just passive discovery)
+ *	o This type of discovery is much more reliable. In some cases, it
+ *	  seem that less than 50% of our discoveries get an answer, while
+ *	  we always get ~100% of these.
+ *	o Make faster discovery, statistically divide time of discovery
+ *	  events by 2 (important for the latency aspect and user feel)
+ *	o Even is we do active discovery, the other node might not
+ *	  answer our discoveries (ex: Palm). The Palm will just perform
+ *	  one active discovery and connect directly to us.
+ *
+ * However, when both devices discover each other, they might attempt to
+ * connect to each other following the discovery event, and it would create
+ * collisions on the medium (SNRM battle).
+ * The "fix" for that is to disable all connection requests in IrLAP
+ * for 100ms after a discovery indication by setting the media_busy flag.
+ * Previously, we used to postpone the event which was quite ugly. Now
+ * that IrLAP takes care of this problem, just pass the event up...
+ *
+ * Jean II
+ */
+void irlmp_link_discovery_indication(struct lap_cb *self,
+				     discovery_t *discovery)
+{
+	IRDA_ASSERT(self != NULL, return;);
+	IRDA_ASSERT(self->magic == LMP_LAP_MAGIC, return;);
+
+	/* Add to main log, cleanup */
+	irlmp_add_discovery(irlmp->cachelog, discovery);
+
+	/* Just handle it the same way as a discovery confirm,
+	 * bypass the LM_LAP state machine (see below) */
+	irlmp_discovery_confirm(irlmp->cachelog, DISCOVERY_PASSIVE);
+}
+
+/*
+ * Function irlmp_link_discovery_confirm (self, log)
+ *
+ *    Called by IrLAP with a list of discoveries after the discovery
+ *    request has been carried out. A NULL log is received if IrLAP
+ *    was unable to carry out the discovery request
+ *
+ */
+void irlmp_link_discovery_confirm(struct lap_cb *self, hashbin_t *log)
+{
+	IRDA_ASSERT(self != NULL, return;);
+	IRDA_ASSERT(self->magic == LMP_LAP_MAGIC, return;);
+
+	/* Add to main log, cleanup */
+	irlmp_add_discovery_log(irlmp->cachelog, log);
+
+	/* Propagate event to various LSAPs registered for it.
+	 * We bypass the LM_LAP state machine because
+	 *	1) We do it regardless of the LM_LAP state
+	 *	2) It doesn't affect the LM_LAP state
+	 *	3) Faster, slimer, simpler, ...
+	 * Jean II */
+	irlmp_discovery_confirm(irlmp->cachelog, DISCOVERY_ACTIVE);
+}
+
+#ifdef CONFIG_IRDA_CACHE_LAST_LSAP
+static inline void irlmp_update_cache(struct lap_cb *lap,
+				      struct lsap_cb *lsap)
+{
+	/* Prevent concurrent read to get garbage */
+	lap->cache.valid = FALSE;
+	/* Update cache entry */
+	lap->cache.dlsap_sel = lsap->dlsap_sel;
+	lap->cache.slsap_sel = lsap->slsap_sel;
+	lap->cache.lsap = lsap;
+	lap->cache.valid = TRUE;
+}
+#endif
+
+/*
+ * Function irlmp_find_handle (self, dlsap_sel, slsap_sel, status, queue)
+ *
+ *    Find handle associated with destination and source LSAP
+ *
+ * Any IrDA connection (LSAP/TSAP) is uniquely identified by
+ * 3 parameters, the local lsap, the remote lsap and the remote address.
+ * We may initiate multiple connections to the same remote service
+ * (they will have different local lsap), a remote device may initiate
+ * multiple connections to the same local service (they will have
+ * different remote lsap), or multiple devices may connect to the same
+ * service and may use the same remote lsap (and they will have
+ * different remote address).
+ * So, where is the remote address ? Each LAP connection is made with
+ * a single remote device, so imply a specific remote address.
+ * Jean II
+ */
+static struct lsap_cb *irlmp_find_lsap(struct lap_cb *self, __u8 dlsap_sel,
+				       __u8 slsap_sel, int status,
+				       hashbin_t *queue)
+{
+	struct lsap_cb *lsap;
+	unsigned long flags;
+
+	/*
+	 *  Optimize for the common case. We assume that the last frame
+	 *  received is in the same connection as the last one, so check in
+	 *  cache first to avoid the linear search
+	 */
+#ifdef CONFIG_IRDA_CACHE_LAST_LSAP
+	if ((self->cache.valid) &&
+	    (self->cache.slsap_sel == slsap_sel) &&
+	    (self->cache.dlsap_sel == dlsap_sel))
+	{
+		return self->cache.lsap;
+	}
+#endif
+
+	spin_lock_irqsave(&queue->hb_spinlock, flags);
+
+	lsap = (struct lsap_cb *) hashbin_get_first(queue);
+	while (lsap != NULL) {
+		/*
+		 *  If this is an incoming connection, then the destination
+		 *  LSAP selector may have been specified as LM_ANY so that
+		 *  any client can connect. In that case we only need to check
+		 *  if the source LSAP (in our view!) match!
+		 */
+		if ((status == CONNECT_CMD) &&
+		    (lsap->slsap_sel == slsap_sel) &&
+		    (lsap->dlsap_sel == LSAP_ANY)) {
+			/* This is where the dest lsap sel is set on incoming
+			 * lsaps */
+			lsap->dlsap_sel = dlsap_sel;
+			break;
+		}
+		/*
+		 *  Check if source LSAP and dest LSAP selectors match.
+		 */
+		if ((lsap->slsap_sel == slsap_sel) &&
+		    (lsap->dlsap_sel == dlsap_sel))
+			break;
+
+		lsap = (struct lsap_cb *) hashbin_get_next(queue);
+	}
+#ifdef CONFIG_IRDA_CACHE_LAST_LSAP
+	if(lsap)
+		irlmp_update_cache(self, lsap);
+#endif
+	spin_unlock_irqrestore(&queue->hb_spinlock, flags);
+
+	/* Return what we've found or NULL */
+	return lsap;
+}