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linux/drivers/isdn/hisax/tei.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

466 lines
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/* $Id: tei.c,v 2.20.2.3 2004/01/13 14:31:26 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 "hisax.h"
#include "isdnl2.h"
#include <linux/gfp.h>
#include <linux/init.h>
#include <linux/random.h>
const char *tei_revision = "$Revision: 2.20.2.3 $";
#define ID_REQUEST 1
#define ID_ASSIGNED 2
#define ID_DENIED 3
#define ID_CHK_REQ 4
#define ID_CHK_RES 5
#define ID_REMOVE 6
#define ID_VERIFY 7
#define TEI_ENTITY_ID 0xf
static struct Fsm teifsm;
void tei_handler(struct PStack *st, u_char pr, struct sk_buff *skb);
enum {
ST_TEI_NOP,
ST_TEI_IDREQ,
ST_TEI_IDVERIFY,
};
#define TEI_STATE_COUNT (ST_TEI_IDVERIFY+1)
static char *strTeiState[] =
{
"ST_TEI_NOP",
"ST_TEI_IDREQ",
"ST_TEI_IDVERIFY",
};
enum {
EV_IDREQ,
EV_ASSIGN,
EV_DENIED,
EV_CHKREQ,
EV_REMOVE,
EV_VERIFY,
EV_T202,
};
#define TEI_EVENT_COUNT (EV_T202+1)
static char *strTeiEvent[] =
{
"EV_IDREQ",
"EV_ASSIGN",
"EV_DENIED",
"EV_CHKREQ",
"EV_REMOVE",
"EV_VERIFY",
"EV_T202",
};
static unsigned int
random_ri(void)
{
unsigned int x;
get_random_bytes(&x, sizeof(x));
return (x & 0xffff);
}
static struct PStack *
findtei(struct PStack *st, int tei)
{
struct PStack *ptr = *(st->l1.stlistp);
if (tei == 127)
return (NULL);
while (ptr)
if (ptr->l2.tei == tei)
return (ptr);
else
ptr = ptr->next;
return (NULL);
}
static void
put_tei_msg(struct PStack *st, u_char m_id, unsigned int ri, u_char tei)
{
struct sk_buff *skb;
u_char *bp;
if (!(skb = alloc_skb(8, GFP_ATOMIC))) {
printk(KERN_WARNING "HiSax: No skb for TEI manager\n");
return;
}
bp = skb_put(skb, 3);
bp[0] = (TEI_SAPI << 2);
bp[1] = (GROUP_TEI << 1) | 0x1;
bp[2] = UI;
bp = skb_put(skb, 5);
bp[0] = TEI_ENTITY_ID;
bp[1] = ri >> 8;
bp[2] = ri & 0xff;
bp[3] = m_id;
bp[4] = (tei << 1) | 1;
st->l2.l2l1(st, PH_DATA | REQUEST, skb);
}
static void
tei_id_request(struct FsmInst *fi, int event, void *arg)
{
struct PStack *st = fi->userdata;
if (st->l2.tei != -1) {
st->ma.tei_m.printdebug(&st->ma.tei_m,
"assign request for allready asigned tei %d",
st->l2.tei);
return;
}
st->ma.ri = random_ri();
if (st->ma.debug)
st->ma.tei_m.printdebug(&st->ma.tei_m,
"assign request ri %d", st->ma.ri);
put_tei_msg(st, ID_REQUEST, st->ma.ri, 127);
FsmChangeState(&st->ma.tei_m, ST_TEI_IDREQ);
FsmAddTimer(&st->ma.t202, st->ma.T202, EV_T202, NULL, 1);
st->ma.N202 = 3;
}
static void
tei_id_assign(struct FsmInst *fi, int event, void *arg)
{
struct PStack *ost, *st = fi->userdata;
struct sk_buff *skb = arg;
struct IsdnCardState *cs;
int ri, tei;
ri = ((unsigned int) skb->data[1] << 8) + skb->data[2];
tei = skb->data[4] >> 1;
if (st->ma.debug)
st->ma.tei_m.printdebug(&st->ma.tei_m,
"identity assign ri %d tei %d", ri, tei);
if ((ost = findtei(st, tei))) { /* same tei is in use */
if (ri != ost->ma.ri) {
st->ma.tei_m.printdebug(&st->ma.tei_m,
"possible duplicate assignment tei %d", tei);
ost->l2.l2tei(ost, MDL_ERROR | RESPONSE, NULL);
}
} else if (ri == st->ma.ri) {
FsmDelTimer(&st->ma.t202, 1);
FsmChangeState(&st->ma.tei_m, ST_TEI_NOP);
st->l3.l3l2(st, MDL_ASSIGN | REQUEST, (void *) (long) tei);
cs = (struct IsdnCardState *) st->l1.hardware;
cs->cardmsg(cs, MDL_ASSIGN | REQUEST, NULL);
}
}
static void
tei_id_test_dup(struct FsmInst *fi, int event, void *arg)
{
struct PStack *ost, *st = fi->userdata;
struct sk_buff *skb = arg;
int tei, ri;
ri = ((unsigned int) skb->data[1] << 8) + skb->data[2];
tei = skb->data[4] >> 1;
if (st->ma.debug)
st->ma.tei_m.printdebug(&st->ma.tei_m,
"foreign identity assign ri %d tei %d", ri, tei);
if ((ost = findtei(st, tei))) { /* same tei is in use */
if (ri != ost->ma.ri) { /* and it wasn't our request */
st->ma.tei_m.printdebug(&st->ma.tei_m,
"possible duplicate assignment tei %d", tei);
FsmEvent(&ost->ma.tei_m, EV_VERIFY, NULL);
}
}
}
static void
tei_id_denied(struct FsmInst *fi, int event, void *arg)
{
struct PStack *st = fi->userdata;
struct sk_buff *skb = arg;
int ri, tei;
ri = ((unsigned int) skb->data[1] << 8) + skb->data[2];
tei = skb->data[4] >> 1;
if (st->ma.debug)
st->ma.tei_m.printdebug(&st->ma.tei_m,
"identity denied ri %d tei %d", ri, tei);
}
static void
tei_id_chk_req(struct FsmInst *fi, int event, void *arg)
{
struct PStack *st = fi->userdata;
struct sk_buff *skb = arg;
int tei;
tei = skb->data[4] >> 1;
if (st->ma.debug)
st->ma.tei_m.printdebug(&st->ma.tei_m,
"identity check req tei %d", tei);
if ((st->l2.tei != -1) && ((tei == GROUP_TEI) || (tei == st->l2.tei))) {
FsmDelTimer(&st->ma.t202, 4);
FsmChangeState(&st->ma.tei_m, ST_TEI_NOP);
put_tei_msg(st, ID_CHK_RES, random_ri(), st->l2.tei);
}
}
static void
tei_id_remove(struct FsmInst *fi, int event, void *arg)
{
struct PStack *st = fi->userdata;
struct sk_buff *skb = arg;
struct IsdnCardState *cs;
int tei;
tei = skb->data[4] >> 1;
if (st->ma.debug)
st->ma.tei_m.printdebug(&st->ma.tei_m,
"identity remove tei %d", tei);
if ((st->l2.tei != -1) && ((tei == GROUP_TEI) || (tei == st->l2.tei))) {
FsmDelTimer(&st->ma.t202, 5);
FsmChangeState(&st->ma.tei_m, ST_TEI_NOP);
st->l3.l3l2(st, MDL_REMOVE | REQUEST, NULL);
cs = (struct IsdnCardState *) st->l1.hardware;
cs->cardmsg(cs, MDL_REMOVE | REQUEST, NULL);
}
}
static void
tei_id_verify(struct FsmInst *fi, int event, void *arg)
{
struct PStack *st = fi->userdata;
if (st->ma.debug)
st->ma.tei_m.printdebug(&st->ma.tei_m,
"id verify request for tei %d", st->l2.tei);
put_tei_msg(st, ID_VERIFY, 0, st->l2.tei);
FsmChangeState(&st->ma.tei_m, ST_TEI_IDVERIFY);
FsmAddTimer(&st->ma.t202, st->ma.T202, EV_T202, NULL, 2);
st->ma.N202 = 2;
}
static void
tei_id_req_tout(struct FsmInst *fi, int event, void *arg)
{
struct PStack *st = fi->userdata;
struct IsdnCardState *cs;
if (--st->ma.N202) {
st->ma.ri = random_ri();
if (st->ma.debug)
st->ma.tei_m.printdebug(&st->ma.tei_m,
"assign req(%d) ri %d", 4 - st->ma.N202,
st->ma.ri);
put_tei_msg(st, ID_REQUEST, st->ma.ri, 127);
FsmAddTimer(&st->ma.t202, st->ma.T202, EV_T202, NULL, 3);
} else {
st->ma.tei_m.printdebug(&st->ma.tei_m, "assign req failed");
st->l3.l3l2(st, MDL_ERROR | RESPONSE, NULL);
cs = (struct IsdnCardState *) st->l1.hardware;
cs->cardmsg(cs, MDL_REMOVE | REQUEST, NULL);
FsmChangeState(fi, ST_TEI_NOP);
}
}
static void
tei_id_ver_tout(struct FsmInst *fi, int event, void *arg)
{
struct PStack *st = fi->userdata;
struct IsdnCardState *cs;
if (--st->ma.N202) {
if (st->ma.debug)
st->ma.tei_m.printdebug(&st->ma.tei_m,
"id verify req(%d) for tei %d",
3 - st->ma.N202, st->l2.tei);
put_tei_msg(st, ID_VERIFY, 0, st->l2.tei);
FsmAddTimer(&st->ma.t202, st->ma.T202, EV_T202, NULL, 4);
} else {
st->ma.tei_m.printdebug(&st->ma.tei_m,
"verify req for tei %d failed", st->l2.tei);
st->l3.l3l2(st, MDL_REMOVE | REQUEST, NULL);
cs = (struct IsdnCardState *) st->l1.hardware;
cs->cardmsg(cs, MDL_REMOVE | REQUEST, NULL);
FsmChangeState(fi, ST_TEI_NOP);
}
}
static void
tei_l1l2(struct PStack *st, int pr, void *arg)
{
struct sk_buff *skb = arg;
int mt;
if (test_bit(FLG_FIXED_TEI, &st->l2.flag)) {
dev_kfree_skb(skb);
return;
}
if (pr == (PH_DATA | INDICATION)) {
if (skb->len < 3) {
st->ma.tei_m.printdebug(&st->ma.tei_m,
"short mgr frame %ld/3", skb->len);
} else if ((skb->data[0] != ((TEI_SAPI << 2) | 2)) ||
(skb->data[1] != ((GROUP_TEI << 1) | 1))) {
st->ma.tei_m.printdebug(&st->ma.tei_m,
"wrong mgr sapi/tei %x/%x",
skb->data[0], skb->data[1]);
} else if ((skb->data[2] & 0xef) != UI) {
st->ma.tei_m.printdebug(&st->ma.tei_m,
"mgr frame is not ui %x", skb->data[2]);
} else {
skb_pull(skb, 3);
if (skb->len < 5) {
st->ma.tei_m.printdebug(&st->ma.tei_m,
"short mgr frame %ld/5", skb->len);
} else if (skb->data[0] != TEI_ENTITY_ID) {
/* wrong management entity identifier, ignore */
st->ma.tei_m.printdebug(&st->ma.tei_m,
"tei handler wrong entity id %x",
skb->data[0]);
} else {
mt = skb->data[3];
if (mt == ID_ASSIGNED)
FsmEvent(&st->ma.tei_m, EV_ASSIGN, skb);
else if (mt == ID_DENIED)
FsmEvent(&st->ma.tei_m, EV_DENIED, skb);
else if (mt == ID_CHK_REQ)
FsmEvent(&st->ma.tei_m, EV_CHKREQ, skb);
else if (mt == ID_REMOVE)
FsmEvent(&st->ma.tei_m, EV_REMOVE, skb);
else {
st->ma.tei_m.printdebug(&st->ma.tei_m,
"tei handler wrong mt %x\n", mt);
}
}
}
} else {
st->ma.tei_m.printdebug(&st->ma.tei_m,
"tei handler wrong pr %x\n", pr);
}
dev_kfree_skb(skb);
}
static void
tei_l2tei(struct PStack *st, int pr, void *arg)
{
struct IsdnCardState *cs;
if (test_bit(FLG_FIXED_TEI, &st->l2.flag)) {
if (pr == (MDL_ASSIGN | INDICATION)) {
if (st->ma.debug)
st->ma.tei_m.printdebug(&st->ma.tei_m,
"fixed assign tei %d", st->l2.tei);
st->l3.l3l2(st, MDL_ASSIGN | REQUEST, (void *) (long) st->l2.tei);
cs = (struct IsdnCardState *) st->l1.hardware;
cs->cardmsg(cs, MDL_ASSIGN | REQUEST, NULL);
}
return;
}
switch (pr) {
case (MDL_ASSIGN | INDICATION):
FsmEvent(&st->ma.tei_m, EV_IDREQ, arg);
break;
case (MDL_ERROR | REQUEST):
FsmEvent(&st->ma.tei_m, EV_VERIFY, arg);
break;
default:
break;
}
}
static void
tei_debug(struct FsmInst *fi, char *fmt, ...)
{
va_list args;
struct PStack *st = fi->userdata;
va_start(args, fmt);
VHiSax_putstatus(st->l1.hardware, "tei ", fmt, args);
va_end(args);
}
void
setstack_tei(struct PStack *st)
{
st->l2.l2tei = tei_l2tei;
st->ma.T202 = 2000; /* T202 2000 milliseconds */
st->l1.l1tei = tei_l1l2;
st->ma.debug = 1;
st->ma.tei_m.fsm = &teifsm;
st->ma.tei_m.state = ST_TEI_NOP;
st->ma.tei_m.debug = 1;
st->ma.tei_m.userdata = st;
st->ma.tei_m.userint = 0;
st->ma.tei_m.printdebug = tei_debug;
FsmInitTimer(&st->ma.tei_m, &st->ma.t202);
}
void
init_tei(struct IsdnCardState *cs, int protocol)
{
}
void
release_tei(struct IsdnCardState *cs)
{
struct PStack *st = cs->stlist;
while (st) {
FsmDelTimer(&st->ma.t202, 1);
st = st->next;
}
}
static struct FsmNode TeiFnList[] __initdata =
{
{ST_TEI_NOP, EV_IDREQ, tei_id_request},
{ST_TEI_NOP, EV_ASSIGN, tei_id_test_dup},
{ST_TEI_NOP, EV_VERIFY, tei_id_verify},
{ST_TEI_NOP, EV_REMOVE, tei_id_remove},
{ST_TEI_NOP, EV_CHKREQ, tei_id_chk_req},
{ST_TEI_IDREQ, EV_T202, tei_id_req_tout},
{ST_TEI_IDREQ, EV_ASSIGN, tei_id_assign},
{ST_TEI_IDREQ, EV_DENIED, tei_id_denied},
{ST_TEI_IDVERIFY, EV_T202, tei_id_ver_tout},
{ST_TEI_IDVERIFY, EV_REMOVE, tei_id_remove},
{ST_TEI_IDVERIFY, EV_CHKREQ, tei_id_chk_req},
};
int __init
TeiNew(void)
{
teifsm.state_count = TEI_STATE_COUNT;
teifsm.event_count = TEI_EVENT_COUNT;
teifsm.strEvent = strTeiEvent;
teifsm.strState = strTeiState;
return FsmNew(&teifsm, TeiFnList, ARRAY_SIZE(TeiFnList));
}
void
TeiFree(void)
{
FsmFree(&teifsm);
}
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