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linux-next/drivers/isdn/hisax/isdnl3.c
Tejun Heo 5a0e3ad6af include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files.  percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.

percpu.h -> slab.h dependency is about to be removed.  Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability.  As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.

  http://userweb.kernel.org/~tj/misc/slabh-sweep.py

The script does the followings.

* Scan files for gfp and slab usages and update includes such that
  only the necessary includes are there.  ie. if only gfp is used,
  gfp.h, if slab is used, slab.h.

* When the script inserts a new include, it looks at the include
  blocks and try to put the new include such that its order conforms
  to its surrounding.  It's put in the include block which contains
  core kernel includes, in the same order that the rest are ordered -
  alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
  doesn't seem to be any matching order.

* If the script can't find a place to put a new include (mostly
  because the file doesn't have fitting include block), it prints out
  an error message indicating which .h file needs to be added to the
  file.

The conversion was done in the following steps.

1. The initial automatic conversion of all .c files updated slightly
   over 4000 files, deleting around 700 includes and adding ~480 gfp.h
   and ~3000 slab.h inclusions.  The script emitted errors for ~400
   files.

2. Each error was manually checked.  Some didn't need the inclusion,
   some needed manual addition while adding it to implementation .h or
   embedding .c file was more appropriate for others.  This step added
   inclusions to around 150 files.

3. The script was run again and the output was compared to the edits
   from #2 to make sure no file was left behind.

4. Several build tests were done and a couple of problems were fixed.
   e.g. lib/decompress_*.c used malloc/free() wrappers around slab
   APIs requiring slab.h to be added manually.

5. The script was run on all .h files but without automatically
   editing them as sprinkling gfp.h and slab.h inclusions around .h
   files could easily lead to inclusion dependency hell.  Most gfp.h
   inclusion directives were ignored as stuff from gfp.h was usually
   wildly available and often used in preprocessor macros.  Each
   slab.h inclusion directive was examined and added manually as
   necessary.

6. percpu.h was updated not to include slab.h.

7. Build test were done on the following configurations and failures
   were fixed.  CONFIG_GCOV_KERNEL was turned off for all tests (as my
   distributed build env didn't work with gcov compiles) and a few
   more options had to be turned off depending on archs to make things
   build (like ipr on powerpc/64 which failed due to missing writeq).

   * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
   * powerpc and powerpc64 SMP allmodconfig
   * sparc and sparc64 SMP allmodconfig
   * ia64 SMP allmodconfig
   * s390 SMP allmodconfig
   * alpha SMP allmodconfig
   * um on x86_64 SMP allmodconfig

8. percpu.h modifications were reverted so that it could be applied as
   a separate patch and serve as bisection point.

Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.

Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-30 22:02:32 +09:00

597 lines
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/* $Id: isdnl3.c,v 2.22.2.3 2004/01/13 14:31:25 keil Exp $
*
* Author Karsten Keil
* based on the teles driver from Jan den Ouden
* Copyright by Karsten Keil <keil@isdn4linux.de>
*
* This software may be used and distributed according to the terms
* of the GNU General Public License, incorporated herein by reference.
*
* For changes and modifications please read
* Documentation/isdn/HiSax.cert
*
* Thanks to Jan den Ouden
* Fritz Elfert
*
*/
#include <linux/init.h>
#include <linux/slab.h>
#include "hisax.h"
#include "isdnl3.h"
const char *l3_revision = "$Revision: 2.22.2.3 $";
static struct Fsm l3fsm;
enum {
ST_L3_LC_REL,
ST_L3_LC_ESTAB_WAIT,
ST_L3_LC_REL_DELAY,
ST_L3_LC_REL_WAIT,
ST_L3_LC_ESTAB,
};
#define L3_STATE_COUNT (ST_L3_LC_ESTAB+1)
static char *strL3State[] =
{
"ST_L3_LC_REL",
"ST_L3_LC_ESTAB_WAIT",
"ST_L3_LC_REL_DELAY",
"ST_L3_LC_REL_WAIT",
"ST_L3_LC_ESTAB",
};
enum {
EV_ESTABLISH_REQ,
EV_ESTABLISH_IND,
EV_ESTABLISH_CNF,
EV_RELEASE_REQ,
EV_RELEASE_CNF,
EV_RELEASE_IND,
EV_TIMEOUT,
};
#define L3_EVENT_COUNT (EV_TIMEOUT+1)
static char *strL3Event[] =
{
"EV_ESTABLISH_REQ",
"EV_ESTABLISH_IND",
"EV_ESTABLISH_CNF",
"EV_RELEASE_REQ",
"EV_RELEASE_CNF",
"EV_RELEASE_IND",
"EV_TIMEOUT",
};
static void
l3m_debug(struct FsmInst *fi, char *fmt, ...)
{
va_list args;
struct PStack *st = fi->userdata;
va_start(args, fmt);
VHiSax_putstatus(st->l1.hardware, st->l3.debug_id, fmt, args);
va_end(args);
}
u_char *
findie(u_char * p, int size, u_char ie, int wanted_set)
{
int l, codeset, maincodeset;
u_char *pend = p + size;
/* skip protocol discriminator, callref and message type */
p++;
l = (*p++) & 0xf;
p += l;
p++;
codeset = 0;
maincodeset = 0;
/* while there are bytes left... */
while (p < pend) {
if ((*p & 0xf0) == 0x90) {
codeset = *p & 0x07;
if (!(*p & 0x08))
maincodeset = codeset;
}
if (*p & 0x80)
p++;
else {
if (codeset == wanted_set) {
if (*p == ie)
{ /* improved length check (Werner Cornelius) */
if ((pend - p) < 2)
return(NULL);
if (*(p+1) > (pend - (p+2)))
return(NULL);
return (p);
}
if (*p > ie)
return (NULL);
}
p++;
l = *p++;
p += l;
codeset = maincodeset;
}
}
return (NULL);
}
int
getcallref(u_char * p)
{
int l, cr = 0;
p++; /* prot discr */
if (*p & 0xfe) /* wrong callref BRI only 1 octet*/
return(-2);
l = 0xf & *p++; /* callref length */
if (!l) /* dummy CallRef */
return(-1);
cr = *p++;
return (cr);
}
static int OrigCallRef = 0;
int
newcallref(void)
{
if (OrigCallRef == 127)
OrigCallRef = 1;
else
OrigCallRef++;
return (OrigCallRef);
}
void
newl3state(struct l3_process *pc, int state)
{
if (pc->debug & L3_DEB_STATE)
l3_debug(pc->st, "newstate cr %d %d --> %d",
pc->callref & 0x7F,
pc->state, state);
pc->state = state;
}
static void
L3ExpireTimer(struct L3Timer *t)
{
t->pc->st->lli.l4l3(t->pc->st, t->event, t->pc);
}
void
L3InitTimer(struct l3_process *pc, struct L3Timer *t)
{
t->pc = pc;
t->tl.function = (void *) L3ExpireTimer;
t->tl.data = (long) t;
init_timer(&t->tl);
}
void
L3DelTimer(struct L3Timer *t)
{
del_timer(&t->tl);
}
int
L3AddTimer(struct L3Timer *t,
int millisec, int event)
{
if (timer_pending(&t->tl)) {
printk(KERN_WARNING "L3AddTimer: timer already active!\n");
return -1;
}
init_timer(&t->tl);
t->event = event;
t->tl.expires = jiffies + (millisec * HZ) / 1000;
add_timer(&t->tl);
return 0;
}
void
StopAllL3Timer(struct l3_process *pc)
{
L3DelTimer(&pc->timer);
}
struct sk_buff *
l3_alloc_skb(int len)
{
struct sk_buff *skb;
if (!(skb = alloc_skb(len + MAX_HEADER_LEN, GFP_ATOMIC))) {
printk(KERN_WARNING "HiSax: No skb for D-channel\n");
return (NULL);
}
skb_reserve(skb, MAX_HEADER_LEN);
return (skb);
}
static void
no_l3_proto(struct PStack *st, int pr, void *arg)
{
struct sk_buff *skb = arg;
HiSax_putstatus(st->l1.hardware, "L3", "no D protocol");
if (skb) {
dev_kfree_skb(skb);
}
}
static int
no_l3_proto_spec(struct PStack *st, isdn_ctrl *ic)
{
printk(KERN_WARNING "HiSax: no specific protocol handler for proto %lu\n",ic->arg & 0xFF);
return(-1);
}
struct l3_process
*getl3proc(struct PStack *st, int cr)
{
struct l3_process *p = st->l3.proc;
while (p)
if (p->callref == cr)
return (p);
else
p = p->next;
return (NULL);
}
struct l3_process
*new_l3_process(struct PStack *st, int cr)
{
struct l3_process *p, *np;
if (!(p = kmalloc(sizeof(struct l3_process), GFP_ATOMIC))) {
printk(KERN_ERR "HiSax can't get memory for cr %d\n", cr);
return (NULL);
}
if (!st->l3.proc)
st->l3.proc = p;
else {
np = st->l3.proc;
while (np->next)
np = np->next;
np->next = p;
}
p->next = NULL;
p->debug = st->l3.debug;
p->callref = cr;
p->state = 0;
p->chan = NULL;
p->st = st;
p->N303 = st->l3.N303;
L3InitTimer(p, &p->timer);
return (p);
};
void
release_l3_process(struct l3_process *p)
{
struct l3_process *np, *pp = NULL;
if (!p)
return;
np = p->st->l3.proc;
while (np) {
if (np == p) {
StopAllL3Timer(p);
if (pp)
pp->next = np->next;
else if (!(p->st->l3.proc = np->next) &&
!test_bit(FLG_PTP, &p->st->l2.flag)) {
if (p->debug)
l3_debug(p->st, "release_l3_process: last process");
if (skb_queue_empty(&p->st->l3.squeue)) {
if (p->debug)
l3_debug(p->st, "release_l3_process: release link");
if (p->st->protocol != ISDN_PTYPE_NI1)
FsmEvent(&p->st->l3.l3m, EV_RELEASE_REQ, NULL);
else
FsmEvent(&p->st->l3.l3m, EV_RELEASE_IND, NULL);
} else {
if (p->debug)
l3_debug(p->st, "release_l3_process: not release link");
}
}
kfree(p);
return;
}
pp = np;
np = np->next;
}
printk(KERN_ERR "HiSax internal L3 error CR(%d) not in list\n", p->callref);
l3_debug(p->st, "HiSax internal L3 error CR(%d) not in list", p->callref);
};
static void
l3ml3p(struct PStack *st, int pr)
{
struct l3_process *p = st->l3.proc;
struct l3_process *np;
while (p) {
/* p might be kfreed under us, so we need to save where we want to go on */
np = p->next;
st->l3.l3ml3(st, pr, p);
p = np;
}
}
void
setstack_l3dc(struct PStack *st, struct Channel *chanp)
{
char tmp[64];
st->l3.proc = NULL;
st->l3.global = NULL;
skb_queue_head_init(&st->l3.squeue);
st->l3.l3m.fsm = &l3fsm;
st->l3.l3m.state = ST_L3_LC_REL;
st->l3.l3m.debug = 1;
st->l3.l3m.userdata = st;
st->l3.l3m.userint = 0;
st->l3.l3m.printdebug = l3m_debug;
FsmInitTimer(&st->l3.l3m, &st->l3.l3m_timer);
strcpy(st->l3.debug_id, "L3DC ");
st->lli.l4l3_proto = no_l3_proto_spec;
#ifdef CONFIG_HISAX_EURO
if (st->protocol == ISDN_PTYPE_EURO) {
setstack_dss1(st);
} else
#endif
#ifdef CONFIG_HISAX_NI1
if (st->protocol == ISDN_PTYPE_NI1) {
setstack_ni1(st);
} else
#endif
#ifdef CONFIG_HISAX_1TR6
if (st->protocol == ISDN_PTYPE_1TR6) {
setstack_1tr6(st);
} else
#endif
if (st->protocol == ISDN_PTYPE_LEASED) {
st->lli.l4l3 = no_l3_proto;
st->l2.l2l3 = no_l3_proto;
st->l3.l3ml3 = no_l3_proto;
printk(KERN_INFO "HiSax: Leased line mode\n");
} else {
st->lli.l4l3 = no_l3_proto;
st->l2.l2l3 = no_l3_proto;
st->l3.l3ml3 = no_l3_proto;
sprintf(tmp, "protocol %s not supported",
(st->protocol == ISDN_PTYPE_1TR6) ? "1tr6" :
(st->protocol == ISDN_PTYPE_EURO) ? "euro" :
(st->protocol == ISDN_PTYPE_NI1) ? "ni1" :
"unknown");
printk(KERN_WARNING "HiSax: %s\n", tmp);
st->protocol = -1;
}
}
static void
isdnl3_trans(struct PStack *st, int pr, void *arg) {
st->l3.l3l2(st, pr, arg);
}
void
releasestack_isdnl3(struct PStack *st)
{
while (st->l3.proc)
release_l3_process(st->l3.proc);
if (st->l3.global) {
StopAllL3Timer(st->l3.global);
kfree(st->l3.global);
st->l3.global = NULL;
}
FsmDelTimer(&st->l3.l3m_timer, 54);
skb_queue_purge(&st->l3.squeue);
}
void
setstack_l3bc(struct PStack *st, struct Channel *chanp)
{
st->l3.proc = NULL;
st->l3.global = NULL;
skb_queue_head_init(&st->l3.squeue);
st->l3.l3m.fsm = &l3fsm;
st->l3.l3m.state = ST_L3_LC_REL;
st->l3.l3m.debug = 1;
st->l3.l3m.userdata = st;
st->l3.l3m.userint = 0;
st->l3.l3m.printdebug = l3m_debug;
strcpy(st->l3.debug_id, "L3BC ");
st->lli.l4l3 = isdnl3_trans;
}
#define DREL_TIMER_VALUE 40000
static void
lc_activate(struct FsmInst *fi, int event, void *arg)
{
struct PStack *st = fi->userdata;
FsmChangeState(fi, ST_L3_LC_ESTAB_WAIT);
st->l3.l3l2(st, DL_ESTABLISH | REQUEST, NULL);
}
static void
lc_connect(struct FsmInst *fi, int event, void *arg)
{
struct PStack *st = fi->userdata;
struct sk_buff *skb = arg;
int dequeued = 0;
FsmChangeState(fi, ST_L3_LC_ESTAB);
while ((skb = skb_dequeue(&st->l3.squeue))) {
st->l3.l3l2(st, DL_DATA | REQUEST, skb);
dequeued++;
}
if ((!st->l3.proc) && dequeued) {
if (st->l3.debug)
l3_debug(st, "lc_connect: release link");
FsmEvent(&st->l3.l3m, EV_RELEASE_REQ, NULL);
} else
l3ml3p(st, DL_ESTABLISH | INDICATION);
}
static void
lc_connected(struct FsmInst *fi, int event, void *arg)
{
struct PStack *st = fi->userdata;
struct sk_buff *skb = arg;
int dequeued = 0;
FsmDelTimer(&st->l3.l3m_timer, 51);
FsmChangeState(fi, ST_L3_LC_ESTAB);
while ((skb = skb_dequeue(&st->l3.squeue))) {
st->l3.l3l2(st, DL_DATA | REQUEST, skb);
dequeued++;
}
if ((!st->l3.proc) && dequeued) {
if (st->l3.debug)
l3_debug(st, "lc_connected: release link");
FsmEvent(&st->l3.l3m, EV_RELEASE_REQ, NULL);
} else
l3ml3p(st, DL_ESTABLISH | CONFIRM);
}
static void
lc_start_delay(struct FsmInst *fi, int event, void *arg)
{
struct PStack *st = fi->userdata;
FsmChangeState(fi, ST_L3_LC_REL_DELAY);
FsmAddTimer(&st->l3.l3m_timer, DREL_TIMER_VALUE, EV_TIMEOUT, NULL, 50);
}
static void
lc_start_delay_check(struct FsmInst *fi, int event, void *arg)
/* 20/09/00 - GE timer not user for NI-1 as layer 2 should stay up */
{
struct PStack *st = fi->userdata;
FsmChangeState(fi, ST_L3_LC_REL_DELAY);
/* 19/09/00 - GE timer not user for NI-1 */
if (st->protocol != ISDN_PTYPE_NI1)
FsmAddTimer(&st->l3.l3m_timer, DREL_TIMER_VALUE, EV_TIMEOUT, NULL, 50);
}
static void
lc_release_req(struct FsmInst *fi, int event, void *arg)
{
struct PStack *st = fi->userdata;
if (test_bit(FLG_L2BLOCK, &st->l2.flag)) {
if (st->l3.debug)
l3_debug(st, "lc_release_req: l2 blocked");
/* restart release timer */
FsmAddTimer(&st->l3.l3m_timer, DREL_TIMER_VALUE, EV_TIMEOUT, NULL, 51);
} else {
FsmChangeState(fi, ST_L3_LC_REL_WAIT);
st->l3.l3l2(st, DL_RELEASE | REQUEST, NULL);
}
}
static void
lc_release_ind(struct FsmInst *fi, int event, void *arg)
{
struct PStack *st = fi->userdata;
FsmDelTimer(&st->l3.l3m_timer, 52);
FsmChangeState(fi, ST_L3_LC_REL);
skb_queue_purge(&st->l3.squeue);
l3ml3p(st, DL_RELEASE | INDICATION);
}
static void
lc_release_cnf(struct FsmInst *fi, int event, void *arg)
{
struct PStack *st = fi->userdata;
FsmChangeState(fi, ST_L3_LC_REL);
skb_queue_purge(&st->l3.squeue);
l3ml3p(st, DL_RELEASE | CONFIRM);
}
/* *INDENT-OFF* */
static struct FsmNode L3FnList[] __initdata =
{
{ST_L3_LC_REL, EV_ESTABLISH_REQ, lc_activate},
{ST_L3_LC_REL, EV_ESTABLISH_IND, lc_connect},
{ST_L3_LC_REL, EV_ESTABLISH_CNF, lc_connect},
{ST_L3_LC_ESTAB_WAIT, EV_ESTABLISH_CNF, lc_connected},
{ST_L3_LC_ESTAB_WAIT, EV_RELEASE_REQ, lc_start_delay},
{ST_L3_LC_ESTAB_WAIT, EV_RELEASE_IND, lc_release_ind},
{ST_L3_LC_ESTAB, EV_RELEASE_IND, lc_release_ind},
{ST_L3_LC_ESTAB, EV_RELEASE_REQ, lc_start_delay_check},
{ST_L3_LC_REL_DELAY, EV_RELEASE_IND, lc_release_ind},
{ST_L3_LC_REL_DELAY, EV_ESTABLISH_REQ, lc_connected},
{ST_L3_LC_REL_DELAY, EV_TIMEOUT, lc_release_req},
{ST_L3_LC_REL_WAIT, EV_RELEASE_CNF, lc_release_cnf},
{ST_L3_LC_REL_WAIT, EV_ESTABLISH_REQ, lc_activate},
};
/* *INDENT-ON* */
void
l3_msg(struct PStack *st, int pr, void *arg)
{
switch (pr) {
case (DL_DATA | REQUEST):
if (st->l3.l3m.state == ST_L3_LC_ESTAB) {
st->l3.l3l2(st, pr, arg);
} else {
struct sk_buff *skb = arg;
skb_queue_tail(&st->l3.squeue, skb);
FsmEvent(&st->l3.l3m, EV_ESTABLISH_REQ, NULL);
}
break;
case (DL_ESTABLISH | REQUEST):
FsmEvent(&st->l3.l3m, EV_ESTABLISH_REQ, NULL);
break;
case (DL_ESTABLISH | CONFIRM):
FsmEvent(&st->l3.l3m, EV_ESTABLISH_CNF, NULL);
break;
case (DL_ESTABLISH | INDICATION):
FsmEvent(&st->l3.l3m, EV_ESTABLISH_IND, NULL);
break;
case (DL_RELEASE | INDICATION):
FsmEvent(&st->l3.l3m, EV_RELEASE_IND, NULL);
break;
case (DL_RELEASE | CONFIRM):
FsmEvent(&st->l3.l3m, EV_RELEASE_CNF, NULL);
break;
case (DL_RELEASE | REQUEST):
FsmEvent(&st->l3.l3m, EV_RELEASE_REQ, NULL);
break;
}
}
int __init
Isdnl3New(void)
{
l3fsm.state_count = L3_STATE_COUNT;
l3fsm.event_count = L3_EVENT_COUNT;
l3fsm.strEvent = strL3Event;
l3fsm.strState = strL3State;
return FsmNew(&l3fsm, L3FnList, ARRAY_SIZE(L3FnList));
}
void
Isdnl3Free(void)
{
FsmFree(&l3fsm);
}
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