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cd354f1ae7
After Al Viro (finally) succeeded in removing the sched.h #include in module.h recently, it makes sense again to remove other superfluous sched.h includes. There are quite a lot of files which include it but don't actually need anything defined in there. Presumably these includes were once needed for macros that used to live in sched.h, but moved to other header files in the course of cleaning it up. To ease the pain, this time I did not fiddle with any header files and only removed #includes from .c-files, which tend to cause less trouble. Compile tested against 2.6.20-rc2 and 2.6.20-rc2-mm2 (with offsets) on alpha, arm, i386, ia64, mips, powerpc, and x86_64 with allnoconfig, defconfig, allmodconfig, and allyesconfig as well as a few randconfigs on x86_64 and all configs in arch/arm/configs on arm. I also checked that no new warnings were introduced by the patch (actually, some warnings are removed that were emitted by unnecessarily included header files). Signed-off-by: Tim Schmielau <tim@physik3.uni-rostock.de> Acked-by: Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
372 lines
9.8 KiB
C
372 lines
9.8 KiB
C
/*********************************************************************
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*
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* Filename: ircomm_lmp.c
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* Version: 1.0
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* Description: Interface between IrCOMM and IrLMP
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* Status: Stable
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* Author: Dag Brattli <dagb@cs.uit.no>
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* Created at: Sun Jun 6 20:48:27 1999
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* Modified at: Sun Dec 12 13:44:17 1999
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* Modified by: Dag Brattli <dagb@cs.uit.no>
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* Sources: Previous IrLPT work by Thomas Davis
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*
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* Copyright (c) 1999 Dag Brattli, All Rights Reserved.
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* Copyright (c) 2000-2003 Jean Tourrilhes <jt@hpl.hp.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*
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********************************************************************/
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#include <linux/init.h>
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#include <net/irda/irda.h>
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#include <net/irda/irlmp.h>
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#include <net/irda/iriap.h>
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#include <net/irda/irda_device.h> /* struct irda_skb_cb */
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#include <net/irda/ircomm_event.h>
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#include <net/irda/ircomm_lmp.h>
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/*
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* Function ircomm_lmp_connect_request (self, userdata)
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*
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*
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*
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*/
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static int ircomm_lmp_connect_request(struct ircomm_cb *self,
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struct sk_buff *userdata,
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struct ircomm_info *info)
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{
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int ret = 0;
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IRDA_DEBUG(0, "%s()\n", __FUNCTION__ );
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/* Don't forget to refcount it - should be NULL anyway */
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if(userdata)
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skb_get(userdata);
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ret = irlmp_connect_request(self->lsap, info->dlsap_sel,
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info->saddr, info->daddr, NULL, userdata);
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return ret;
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}
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/*
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* Function ircomm_lmp_connect_response (self, skb)
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*
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*
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*
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*/
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static int ircomm_lmp_connect_response(struct ircomm_cb *self,
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struct sk_buff *userdata)
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{
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struct sk_buff *tx_skb;
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int ret;
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IRDA_DEBUG(0, "%s()\n", __FUNCTION__ );
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/* Any userdata supplied? */
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if (userdata == NULL) {
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tx_skb = alloc_skb(LMP_MAX_HEADER, GFP_ATOMIC);
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if (!tx_skb)
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return -ENOMEM;
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/* Reserve space for MUX and LAP header */
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skb_reserve(tx_skb, LMP_MAX_HEADER);
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} else {
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/*
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* Check that the client has reserved enough space for
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* headers
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*/
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IRDA_ASSERT(skb_headroom(userdata) >= LMP_MAX_HEADER,
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return -1;);
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/* Don't forget to refcount it - should be NULL anyway */
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skb_get(userdata);
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tx_skb = userdata;
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}
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ret = irlmp_connect_response(self->lsap, tx_skb);
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return 0;
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}
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static int ircomm_lmp_disconnect_request(struct ircomm_cb *self,
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struct sk_buff *userdata,
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struct ircomm_info *info)
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{
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struct sk_buff *tx_skb;
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int ret;
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IRDA_DEBUG(0, "%s()\n", __FUNCTION__ );
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if (!userdata) {
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tx_skb = alloc_skb(LMP_MAX_HEADER, GFP_ATOMIC);
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if (!tx_skb)
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return -ENOMEM;
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/* Reserve space for MUX and LAP header */
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skb_reserve(tx_skb, LMP_MAX_HEADER);
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userdata = tx_skb;
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} else {
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/* Don't forget to refcount it - should be NULL anyway */
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skb_get(userdata);
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}
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ret = irlmp_disconnect_request(self->lsap, userdata);
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return ret;
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}
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/*
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* Function ircomm_lmp_flow_control (skb)
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*
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* This function is called when a data frame we have sent to IrLAP has
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* been deallocated. We do this to make sure we don't flood IrLAP with
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* frames, since we are not using the IrTTP flow control mechanism
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*/
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static void ircomm_lmp_flow_control(struct sk_buff *skb)
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{
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struct irda_skb_cb *cb;
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struct ircomm_cb *self;
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int line;
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IRDA_ASSERT(skb != NULL, return;);
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cb = (struct irda_skb_cb *) skb->cb;
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IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
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line = cb->line;
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self = (struct ircomm_cb *) hashbin_lock_find(ircomm, line, NULL);
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if (!self) {
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IRDA_DEBUG(2, "%s(), didn't find myself\n", __FUNCTION__ );
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return;
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}
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IRDA_ASSERT(self != NULL, return;);
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IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return;);
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self->pkt_count--;
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if ((self->pkt_count < 2) && (self->flow_status == FLOW_STOP)) {
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IRDA_DEBUG(2, "%s(), asking TTY to start again!\n", __FUNCTION__ );
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self->flow_status = FLOW_START;
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if (self->notify.flow_indication)
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self->notify.flow_indication(self->notify.instance,
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self, FLOW_START);
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}
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}
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/*
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* Function ircomm_lmp_data_request (self, userdata)
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*
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* Send data frame to peer device
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*
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*/
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static int ircomm_lmp_data_request(struct ircomm_cb *self,
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struct sk_buff *skb,
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int not_used)
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{
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struct irda_skb_cb *cb;
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int ret;
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IRDA_ASSERT(skb != NULL, return -1;);
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cb = (struct irda_skb_cb *) skb->cb;
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cb->line = self->line;
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IRDA_DEBUG(4, "%s(), sending frame\n", __FUNCTION__ );
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/* Don't forget to refcount it - see ircomm_tty_do_softint() */
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skb_get(skb);
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skb->destructor = ircomm_lmp_flow_control;
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if ((self->pkt_count++ > 7) && (self->flow_status == FLOW_START)) {
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IRDA_DEBUG(2, "%s(), asking TTY to slow down!\n", __FUNCTION__ );
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self->flow_status = FLOW_STOP;
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if (self->notify.flow_indication)
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self->notify.flow_indication(self->notify.instance,
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self, FLOW_STOP);
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}
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ret = irlmp_data_request(self->lsap, skb);
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if (ret) {
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IRDA_ERROR("%s(), failed\n", __FUNCTION__);
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/* irlmp_data_request already free the packet */
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}
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return ret;
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}
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/*
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* Function ircomm_lmp_data_indication (instance, sap, skb)
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*
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* Incoming data which we must deliver to the state machine, to check
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* we are still connected.
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*/
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static int ircomm_lmp_data_indication(void *instance, void *sap,
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struct sk_buff *skb)
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{
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struct ircomm_cb *self = (struct ircomm_cb *) instance;
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IRDA_DEBUG(4, "%s()\n", __FUNCTION__ );
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IRDA_ASSERT(self != NULL, return -1;);
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IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return -1;);
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IRDA_ASSERT(skb != NULL, return -1;);
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ircomm_do_event(self, IRCOMM_LMP_DATA_INDICATION, skb, NULL);
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/* Drop reference count - see ircomm_tty_data_indication(). */
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dev_kfree_skb(skb);
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return 0;
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}
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/*
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* Function ircomm_lmp_connect_confirm (instance, sap, qos, max_sdu_size,
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* max_header_size, skb)
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*
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* Connection has been confirmed by peer device
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*
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*/
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static void ircomm_lmp_connect_confirm(void *instance, void *sap,
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struct qos_info *qos,
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__u32 max_seg_size,
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__u8 max_header_size,
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struct sk_buff *skb)
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{
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struct ircomm_cb *self = (struct ircomm_cb *) instance;
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struct ircomm_info info;
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IRDA_DEBUG(0, "%s()\n", __FUNCTION__ );
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IRDA_ASSERT(self != NULL, return;);
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IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return;);
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IRDA_ASSERT(skb != NULL, return;);
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IRDA_ASSERT(qos != NULL, return;);
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info.max_data_size = max_seg_size;
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info.max_header_size = max_header_size;
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info.qos = qos;
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ircomm_do_event(self, IRCOMM_LMP_CONNECT_CONFIRM, skb, &info);
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/* Drop reference count - see ircomm_tty_connect_confirm(). */
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dev_kfree_skb(skb);
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}
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/*
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* Function ircomm_lmp_connect_indication (instance, sap, qos, max_sdu_size,
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* max_header_size, skb)
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*
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* Peer device wants to make a connection with us
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*
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*/
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static void ircomm_lmp_connect_indication(void *instance, void *sap,
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struct qos_info *qos,
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__u32 max_seg_size,
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__u8 max_header_size,
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struct sk_buff *skb)
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{
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struct ircomm_cb *self = (struct ircomm_cb *)instance;
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struct ircomm_info info;
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IRDA_DEBUG(0, "%s()\n", __FUNCTION__ );
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IRDA_ASSERT(self != NULL, return;);
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IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return;);
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IRDA_ASSERT(skb != NULL, return;);
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IRDA_ASSERT(qos != NULL, return;);
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info.max_data_size = max_seg_size;
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info.max_header_size = max_header_size;
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info.qos = qos;
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ircomm_do_event(self, IRCOMM_LMP_CONNECT_INDICATION, skb, &info);
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/* Drop reference count - see ircomm_tty_connect_indication(). */
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dev_kfree_skb(skb);
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}
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/*
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* Function ircomm_lmp_disconnect_indication (instance, sap, reason, skb)
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*
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* Peer device has closed the connection, or the link went down for some
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* other reason
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*/
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static void ircomm_lmp_disconnect_indication(void *instance, void *sap,
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LM_REASON reason,
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struct sk_buff *skb)
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{
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struct ircomm_cb *self = (struct ircomm_cb *) instance;
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struct ircomm_info info;
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IRDA_DEBUG(0, "%s()\n", __FUNCTION__ );
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IRDA_ASSERT(self != NULL, return;);
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IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return;);
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info.reason = reason;
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ircomm_do_event(self, IRCOMM_LMP_DISCONNECT_INDICATION, skb, &info);
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/* Drop reference count - see ircomm_tty_disconnect_indication(). */
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if(skb)
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dev_kfree_skb(skb);
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}
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/*
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* Function ircomm_open_lsap (self)
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*
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* Open LSAP. This function will only be used when using "raw" services
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*
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*/
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int ircomm_open_lsap(struct ircomm_cb *self)
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{
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notify_t notify;
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IRDA_DEBUG(0, "%s()\n", __FUNCTION__ );
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/* Register callbacks */
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irda_notify_init(¬ify);
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notify.data_indication = ircomm_lmp_data_indication;
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notify.connect_confirm = ircomm_lmp_connect_confirm;
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notify.connect_indication = ircomm_lmp_connect_indication;
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notify.disconnect_indication = ircomm_lmp_disconnect_indication;
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notify.instance = self;
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strlcpy(notify.name, "IrCOMM", sizeof(notify.name));
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self->lsap = irlmp_open_lsap(LSAP_ANY, ¬ify, 0);
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if (!self->lsap) {
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IRDA_DEBUG(0,"%sfailed to allocate tsap\n", __FUNCTION__ );
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return -1;
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}
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self->slsap_sel = self->lsap->slsap_sel;
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/*
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* Initialize the call-table for issuing commands
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*/
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self->issue.data_request = ircomm_lmp_data_request;
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self->issue.connect_request = ircomm_lmp_connect_request;
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self->issue.connect_response = ircomm_lmp_connect_response;
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self->issue.disconnect_request = ircomm_lmp_disconnect_request;
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return 0;
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}
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