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linux/drivers/isdn/hisax/isdnl2.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

1846 lines
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/* $Id: isdnl2.c,v 2.30.2.4 2004/02/11 13:21:34 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/gfp.h>
#include "hisax.h"
#include "isdnl2.h"
const char *l2_revision = "$Revision: 2.30.2.4 $";
static void l2m_debug(struct FsmInst *fi, char *fmt, ...);
static struct Fsm l2fsm;
enum {
ST_L2_1,
ST_L2_2,
ST_L2_3,
ST_L2_4,
ST_L2_5,
ST_L2_6,
ST_L2_7,
ST_L2_8,
};
#define L2_STATE_COUNT (ST_L2_8+1)
static char *strL2State[] =
{
"ST_L2_1",
"ST_L2_2",
"ST_L2_3",
"ST_L2_4",
"ST_L2_5",
"ST_L2_6",
"ST_L2_7",
"ST_L2_8",
};
enum {
EV_L2_UI,
EV_L2_SABME,
EV_L2_DISC,
EV_L2_DM,
EV_L2_UA,
EV_L2_FRMR,
EV_L2_SUPER,
EV_L2_I,
EV_L2_DL_DATA,
EV_L2_ACK_PULL,
EV_L2_DL_UNIT_DATA,
EV_L2_DL_ESTABLISH_REQ,
EV_L2_DL_RELEASE_REQ,
EV_L2_MDL_ASSIGN,
EV_L2_MDL_REMOVE,
EV_L2_MDL_ERROR,
EV_L1_DEACTIVATE,
EV_L2_T200,
EV_L2_T203,
EV_L2_SET_OWN_BUSY,
EV_L2_CLEAR_OWN_BUSY,
EV_L2_FRAME_ERROR,
};
#define L2_EVENT_COUNT (EV_L2_FRAME_ERROR+1)
static char *strL2Event[] =
{
"EV_L2_UI",
"EV_L2_SABME",
"EV_L2_DISC",
"EV_L2_DM",
"EV_L2_UA",
"EV_L2_FRMR",
"EV_L2_SUPER",
"EV_L2_I",
"EV_L2_DL_DATA",
"EV_L2_ACK_PULL",
"EV_L2_DL_UNIT_DATA",
"EV_L2_DL_ESTABLISH_REQ",
"EV_L2_DL_RELEASE_REQ",
"EV_L2_MDL_ASSIGN",
"EV_L2_MDL_REMOVE",
"EV_L2_MDL_ERROR",
"EV_L1_DEACTIVATE",
"EV_L2_T200",
"EV_L2_T203",
"EV_L2_SET_OWN_BUSY",
"EV_L2_CLEAR_OWN_BUSY",
"EV_L2_FRAME_ERROR",
};
static int l2addrsize(struct Layer2 *l2);
static void
set_peer_busy(struct Layer2 *l2) {
test_and_set_bit(FLG_PEER_BUSY, &l2->flag);
if (!skb_queue_empty(&l2->i_queue) ||
!skb_queue_empty(&l2->ui_queue))
test_and_set_bit(FLG_L2BLOCK, &l2->flag);
}
static void
clear_peer_busy(struct Layer2 *l2) {
if (test_and_clear_bit(FLG_PEER_BUSY, &l2->flag))
test_and_clear_bit(FLG_L2BLOCK, &l2->flag);
}
static void
InitWin(struct Layer2 *l2)
{
int i;
for (i = 0; i < MAX_WINDOW; i++)
l2->windowar[i] = NULL;
}
static int
freewin1(struct Layer2 *l2)
{
int i, cnt = 0;
for (i = 0; i < MAX_WINDOW; i++) {
if (l2->windowar[i]) {
cnt++;
dev_kfree_skb(l2->windowar[i]);
l2->windowar[i] = NULL;
}
}
return cnt;
}
static inline void
freewin(struct PStack *st)
{
freewin1(&st->l2);
}
static void
ReleaseWin(struct Layer2 *l2)
{
int cnt;
if((cnt = freewin1(l2)))
printk(KERN_WARNING "isdl2 freed %d skbuffs in release\n", cnt);
}
static inline unsigned int
cansend(struct PStack *st)
{
unsigned int p1;
if(test_bit(FLG_MOD128, &st->l2.flag))
p1 = (st->l2.vs - st->l2.va) % 128;
else
p1 = (st->l2.vs - st->l2.va) % 8;
return ((p1 < st->l2.window) && !test_bit(FLG_PEER_BUSY, &st->l2.flag));
}
static inline void
clear_exception(struct Layer2 *l2)
{
test_and_clear_bit(FLG_ACK_PEND, &l2->flag);
test_and_clear_bit(FLG_REJEXC, &l2->flag);
test_and_clear_bit(FLG_OWN_BUSY, &l2->flag);
clear_peer_busy(l2);
}
static inline int
l2headersize(struct Layer2 *l2, int ui)
{
return (((test_bit(FLG_MOD128, &l2->flag) && (!ui)) ? 2 : 1) +
(test_bit(FLG_LAPD, &l2->flag) ? 2 : 1));
}
inline int
l2addrsize(struct Layer2 *l2)
{
return (test_bit(FLG_LAPD, &l2->flag) ? 2 : 1);
}
static int
sethdraddr(struct Layer2 *l2, u_char * header, int rsp)
{
u_char *ptr = header;
int crbit = rsp;
if (test_bit(FLG_LAPD, &l2->flag)) {
*ptr++ = (l2->sap << 2) | (rsp ? 2 : 0);
*ptr++ = (l2->tei << 1) | 1;
return (2);
} else {
if (test_bit(FLG_ORIG, &l2->flag))
crbit = !crbit;
if (crbit)
*ptr++ = 1;
else
*ptr++ = 3;
return (1);
}
}
static inline void
enqueue_super(struct PStack *st,
struct sk_buff *skb)
{
if (test_bit(FLG_LAPB, &st->l2.flag))
st->l1.bcs->tx_cnt += skb->len;
st->l2.l2l1(st, PH_DATA | REQUEST, skb);
}
#define enqueue_ui(a, b) enqueue_super(a, b)
static inline int
IsUI(u_char * data)
{
return ((data[0] & 0xef) == UI);
}
static inline int
IsUA(u_char * data)
{
return ((data[0] & 0xef) == UA);
}
static inline int
IsDM(u_char * data)
{
return ((data[0] & 0xef) == DM);
}
static inline int
IsDISC(u_char * data)
{
return ((data[0] & 0xef) == DISC);
}
static inline int
IsSFrame(u_char * data, struct PStack *st)
{
register u_char d = *data;
if (!test_bit(FLG_MOD128, &st->l2.flag))
d &= 0xf;
return(((d & 0xf3) == 1) && ((d & 0x0c) != 0x0c));
}
static inline int
IsSABME(u_char * data, struct PStack *st)
{
u_char d = data[0] & ~0x10;
return (test_bit(FLG_MOD128, &st->l2.flag) ? d == SABME : d == SABM);
}
static inline int
IsREJ(u_char * data, struct PStack *st)
{
return (test_bit(FLG_MOD128, &st->l2.flag) ? data[0] == REJ : (data[0] & 0xf) == REJ);
}
static inline int
IsFRMR(u_char * data)
{
return ((data[0] & 0xef) == FRMR);
}
static inline int
IsRNR(u_char * data, struct PStack *st)
{
return (test_bit(FLG_MOD128, &st->l2.flag) ? data[0] == RNR : (data[0] & 0xf) == RNR);
}
static int
iframe_error(struct PStack *st, struct sk_buff *skb)
{
int i = l2addrsize(&st->l2) + (test_bit(FLG_MOD128, &st->l2.flag) ? 2 : 1);
int rsp = *skb->data & 0x2;
if (test_bit(FLG_ORIG, &st->l2.flag))
rsp = !rsp;
if (rsp)
return 'L';
if (skb->len < i)
return 'N';
if ((skb->len - i) > st->l2.maxlen)
return 'O';
return 0;
}
static int
super_error(struct PStack *st, struct sk_buff *skb)
{
if (skb->len != l2addrsize(&st->l2) +
(test_bit(FLG_MOD128, &st->l2.flag) ? 2 : 1))
return 'N';
return 0;
}
static int
unnum_error(struct PStack *st, struct sk_buff *skb, int wantrsp)
{
int rsp = (*skb->data & 0x2) >> 1;
if (test_bit(FLG_ORIG, &st->l2.flag))
rsp = !rsp;
if (rsp != wantrsp)
return 'L';
if (skb->len != l2addrsize(&st->l2) + 1)
return 'N';
return 0;
}
static int
UI_error(struct PStack *st, struct sk_buff *skb)
{
int rsp = *skb->data & 0x2;
if (test_bit(FLG_ORIG, &st->l2.flag))
rsp = !rsp;
if (rsp)
return 'L';
if (skb->len > st->l2.maxlen + l2addrsize(&st->l2) + 1)
return 'O';
return 0;
}
static int
FRMR_error(struct PStack *st, struct sk_buff *skb)
{
int headers = l2addrsize(&st->l2) + 1;
u_char *datap = skb->data + headers;
int rsp = *skb->data & 0x2;
if (test_bit(FLG_ORIG, &st->l2.flag))
rsp = !rsp;
if (!rsp)
return 'L';
if (test_bit(FLG_MOD128, &st->l2.flag)) {
if (skb->len < headers + 5)
return 'N';
else
l2m_debug(&st->l2.l2m, "FRMR information %2x %2x %2x %2x %2x",
datap[0], datap[1], datap[2],
datap[3], datap[4]);
} else {
if (skb->len < headers + 3)
return 'N';
else
l2m_debug(&st->l2.l2m, "FRMR information %2x %2x %2x",
datap[0], datap[1], datap[2]);
}
return 0;
}
static unsigned int
legalnr(struct PStack *st, unsigned int nr)
{
struct Layer2 *l2 = &st->l2;
if(test_bit(FLG_MOD128, &l2->flag))
return ((nr - l2->va) % 128) <= ((l2->vs - l2->va) % 128);
else
return ((nr - l2->va) % 8) <= ((l2->vs - l2->va) % 8);
}
static void
setva(struct PStack *st, unsigned int nr)
{
struct Layer2 *l2 = &st->l2;
int len;
u_long flags;
spin_lock_irqsave(&l2->lock, flags);
while (l2->va != nr) {
(l2->va)++;
if(test_bit(FLG_MOD128, &l2->flag))
l2->va %= 128;
else
l2->va %= 8;
len = l2->windowar[l2->sow]->len;
if (PACKET_NOACK == l2->windowar[l2->sow]->pkt_type)
len = -1;
dev_kfree_skb(l2->windowar[l2->sow]);
l2->windowar[l2->sow] = NULL;
l2->sow = (l2->sow + 1) % l2->window;
spin_unlock_irqrestore(&l2->lock, flags);
if (test_bit(FLG_LLI_L2WAKEUP, &st->lli.flag) && (len >=0))
lli_writewakeup(st, len);
spin_lock_irqsave(&l2->lock, flags);
}
spin_unlock_irqrestore(&l2->lock, flags);
}
static void
send_uframe(struct PStack *st, u_char cmd, u_char cr)
{
struct sk_buff *skb;
u_char tmp[MAX_HEADER_LEN];
int i;
i = sethdraddr(&st->l2, tmp, cr);
tmp[i++] = cmd;
if (!(skb = alloc_skb(i, GFP_ATOMIC))) {
printk(KERN_WARNING "isdl2 can't alloc sbbuff for send_uframe\n");
return;
}
memcpy(skb_put(skb, i), tmp, i);
enqueue_super(st, skb);
}
static inline u_char
get_PollFlag(struct PStack * st, struct sk_buff * skb)
{
return (skb->data[l2addrsize(&(st->l2))] & 0x10);
}
static inline u_char
get_PollFlagFree(struct PStack *st, struct sk_buff *skb)
{
u_char PF;
PF = get_PollFlag(st, skb);
dev_kfree_skb(skb);
return (PF);
}
static inline void
start_t200(struct PStack *st, int i)
{
FsmAddTimer(&st->l2.t200, st->l2.T200, EV_L2_T200, NULL, i);
test_and_set_bit(FLG_T200_RUN, &st->l2.flag);
}
static inline void
restart_t200(struct PStack *st, int i)
{
FsmRestartTimer(&st->l2.t200, st->l2.T200, EV_L2_T200, NULL, i);
test_and_set_bit(FLG_T200_RUN, &st->l2.flag);
}
static inline void
stop_t200(struct PStack *st, int i)
{
if(test_and_clear_bit(FLG_T200_RUN, &st->l2.flag))
FsmDelTimer(&st->l2.t200, i);
}
static inline void
st5_dl_release_l2l3(struct PStack *st)
{
int pr;
if(test_and_clear_bit(FLG_PEND_REL, &st->l2.flag))
pr = DL_RELEASE | CONFIRM;
else
pr = DL_RELEASE | INDICATION;
st->l2.l2l3(st, pr, NULL);
}
static inline void
lapb_dl_release_l2l3(struct PStack *st, int f)
{
if (test_bit(FLG_LAPB, &st->l2.flag))
st->l2.l2l1(st, PH_DEACTIVATE | REQUEST, NULL);
st->l2.l2l3(st, DL_RELEASE | f, NULL);
}
static void
establishlink(struct FsmInst *fi)
{
struct PStack *st = fi->userdata;
u_char cmd;
clear_exception(&st->l2);
st->l2.rc = 0;
cmd = (test_bit(FLG_MOD128, &st->l2.flag) ? SABME : SABM) | 0x10;
send_uframe(st, cmd, CMD);
FsmDelTimer(&st->l2.t203, 1);
restart_t200(st, 1);
test_and_clear_bit(FLG_PEND_REL, &st->l2.flag);
freewin(st);
FsmChangeState(fi, ST_L2_5);
}
static void
l2_mdl_error_ua(struct FsmInst *fi, int event, void *arg)
{
struct sk_buff *skb = arg;
struct PStack *st = fi->userdata;
if (get_PollFlagFree(st, skb))
st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'C');
else
st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'D');
}
static void
l2_mdl_error_dm(struct FsmInst *fi, int event, void *arg)
{
struct sk_buff *skb = arg;
struct PStack *st = fi->userdata;
if (get_PollFlagFree(st, skb))
st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'B');
else {
st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'E');
establishlink(fi);
test_and_clear_bit(FLG_L3_INIT, &st->l2.flag);
}
}
static void
l2_st8_mdl_error_dm(struct FsmInst *fi, int event, void *arg)
{
struct sk_buff *skb = arg;
struct PStack *st = fi->userdata;
if (get_PollFlagFree(st, skb))
st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'B');
else {
st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'E');
}
establishlink(fi);
test_and_clear_bit(FLG_L3_INIT, &st->l2.flag);
}
static void
l2_go_st3(struct FsmInst *fi, int event, void *arg)
{
FsmChangeState(fi, ST_L2_3);
}
static void
l2_mdl_assign(struct FsmInst *fi, int event, void *arg)
{
struct PStack *st = fi->userdata;
FsmChangeState(fi, ST_L2_3);
st->l2.l2tei(st, MDL_ASSIGN | INDICATION, NULL);
}
static void
l2_queue_ui_assign(struct FsmInst *fi, int event, void *arg)
{
struct PStack *st = fi->userdata;
struct sk_buff *skb = arg;
skb_queue_tail(&st->l2.ui_queue, skb);
FsmChangeState(fi, ST_L2_2);
st->l2.l2tei(st, MDL_ASSIGN | INDICATION, NULL);
}
static void
l2_queue_ui(struct FsmInst *fi, int event, void *arg)
{
struct PStack *st = fi->userdata;
struct sk_buff *skb = arg;
skb_queue_tail(&st->l2.ui_queue, skb);
}
static void
tx_ui(struct PStack *st)
{
struct sk_buff *skb;
u_char header[MAX_HEADER_LEN];
int i;
i = sethdraddr(&(st->l2), header, CMD);
header[i++] = UI;
while ((skb = skb_dequeue(&st->l2.ui_queue))) {
memcpy(skb_push(skb, i), header, i);
enqueue_ui(st, skb);
}
}
static void
l2_send_ui(struct FsmInst *fi, int event, void *arg)
{
struct PStack *st = fi->userdata;
struct sk_buff *skb = arg;
skb_queue_tail(&st->l2.ui_queue, skb);
tx_ui(st);
}
static void
l2_got_ui(struct FsmInst *fi, int event, void *arg)
{
struct PStack *st = fi->userdata;
struct sk_buff *skb = arg;
skb_pull(skb, l2headersize(&st->l2, 1));
st->l2.l2l3(st, DL_UNIT_DATA | INDICATION, skb);
/* ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
* in states 1-3 for broadcast
*/
}
static void
l2_establish(struct FsmInst *fi, int event, void *arg)
{
struct PStack *st = fi->userdata;
establishlink(fi);
test_and_set_bit(FLG_L3_INIT, &st->l2.flag);
}
static void
l2_discard_i_setl3(struct FsmInst *fi, int event, void *arg)
{
struct PStack *st = fi->userdata;
skb_queue_purge(&st->l2.i_queue);
test_and_set_bit(FLG_L3_INIT, &st->l2.flag);
test_and_clear_bit(FLG_PEND_REL, &st->l2.flag);
}
static void
l2_l3_reestablish(struct FsmInst *fi, int event, void *arg)
{
struct PStack *st = fi->userdata;
skb_queue_purge(&st->l2.i_queue);
establishlink(fi);
test_and_set_bit(FLG_L3_INIT, &st->l2.flag);
}
static void
l2_release(struct FsmInst *fi, int event, void *arg)
{
struct PStack *st = fi->userdata;
st->l2.l2l3(st, DL_RELEASE | CONFIRM, NULL);
}
static void
l2_pend_rel(struct FsmInst *fi, int event, void *arg)
{
struct PStack *st = fi->userdata;
test_and_set_bit(FLG_PEND_REL, &st->l2.flag);
}
static void
l2_disconnect(struct FsmInst *fi, int event, void *arg)
{
struct PStack *st = fi->userdata;
skb_queue_purge(&st->l2.i_queue);
freewin(st);
FsmChangeState(fi, ST_L2_6);
st->l2.rc = 0;
send_uframe(st, DISC | 0x10, CMD);
FsmDelTimer(&st->l2.t203, 1);
restart_t200(st, 2);
}
static void
l2_start_multi(struct FsmInst *fi, int event, void *arg)
{
struct PStack *st = fi->userdata;
struct sk_buff *skb = arg;
send_uframe(st, UA | get_PollFlagFree(st, skb), RSP);
clear_exception(&st->l2);
st->l2.vs = 0;
st->l2.va = 0;
st->l2.vr = 0;
st->l2.sow = 0;
FsmChangeState(fi, ST_L2_7);
FsmAddTimer(&st->l2.t203, st->l2.T203, EV_L2_T203, NULL, 3);
st->l2.l2l3(st, DL_ESTABLISH | INDICATION, NULL);
}
static void
l2_send_UA(struct FsmInst *fi, int event, void *arg)
{
struct PStack *st = fi->userdata;
struct sk_buff *skb = arg;
send_uframe(st, UA | get_PollFlagFree(st, skb), RSP);
}
static void
l2_send_DM(struct FsmInst *fi, int event, void *arg)
{
struct PStack *st = fi->userdata;
struct sk_buff *skb = arg;
send_uframe(st, DM | get_PollFlagFree(st, skb), RSP);
}
static void
l2_restart_multi(struct FsmInst *fi, int event, void *arg)
{
struct PStack *st = fi->userdata;
struct sk_buff *skb = arg;
int est = 0, state;
state = fi->state;
send_uframe(st, UA | get_PollFlagFree(st, skb), RSP);
st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'F');
if (st->l2.vs != st->l2.va) {
skb_queue_purge(&st->l2.i_queue);
est = 1;
}
clear_exception(&st->l2);
st->l2.vs = 0;
st->l2.va = 0;
st->l2.vr = 0;
st->l2.sow = 0;
FsmChangeState(fi, ST_L2_7);
stop_t200(st, 3);
FsmRestartTimer(&st->l2.t203, st->l2.T203, EV_L2_T203, NULL, 3);
if (est)
st->l2.l2l3(st, DL_ESTABLISH | INDICATION, NULL);
if ((ST_L2_7==state) || (ST_L2_8 == state))
if (!skb_queue_empty(&st->l2.i_queue) && cansend(st))
st->l2.l2l1(st, PH_PULL | REQUEST, NULL);
}
static void
l2_stop_multi(struct FsmInst *fi, int event, void *arg)
{
struct PStack *st = fi->userdata;
struct sk_buff *skb = arg;
FsmChangeState(fi, ST_L2_4);
FsmDelTimer(&st->l2.t203, 3);
stop_t200(st, 4);
send_uframe(st, UA | get_PollFlagFree(st, skb), RSP);
skb_queue_purge(&st->l2.i_queue);
freewin(st);
lapb_dl_release_l2l3(st, INDICATION);
}
static void
l2_connected(struct FsmInst *fi, int event, void *arg)
{
struct PStack *st = fi->userdata;
struct sk_buff *skb = arg;
int pr=-1;
if (!get_PollFlag(st, skb)) {
l2_mdl_error_ua(fi, event, arg);
return;
}
dev_kfree_skb(skb);
if (test_and_clear_bit(FLG_PEND_REL, &st->l2.flag))
l2_disconnect(fi, event, arg);
if (test_and_clear_bit(FLG_L3_INIT, &st->l2.flag)) {
pr = DL_ESTABLISH | CONFIRM;
} else if (st->l2.vs != st->l2.va) {
skb_queue_purge(&st->l2.i_queue);
pr = DL_ESTABLISH | INDICATION;
}
stop_t200(st, 5);
st->l2.vr = 0;
st->l2.vs = 0;
st->l2.va = 0;
st->l2.sow = 0;
FsmChangeState(fi, ST_L2_7);
FsmAddTimer(&st->l2.t203, st->l2.T203, EV_L2_T203, NULL, 4);
if (pr != -1)
st->l2.l2l3(st, pr, NULL);
if (!skb_queue_empty(&st->l2.i_queue) && cansend(st))
st->l2.l2l1(st, PH_PULL | REQUEST, NULL);
}
static void
l2_released(struct FsmInst *fi, int event, void *arg)
{
struct PStack *st = fi->userdata;
struct sk_buff *skb = arg;
if (!get_PollFlag(st, skb)) {
l2_mdl_error_ua(fi, event, arg);
return;
}
dev_kfree_skb(skb);
stop_t200(st, 6);
lapb_dl_release_l2l3(st, CONFIRM);
FsmChangeState(fi, ST_L2_4);
}
static void
l2_reestablish(struct FsmInst *fi, int event, void *arg)
{
struct PStack *st = fi->userdata;
struct sk_buff *skb = arg;
if (!get_PollFlagFree(st, skb)) {
establishlink(fi);
test_and_set_bit(FLG_L3_INIT, &st->l2.flag);
}
}
static void
l2_st5_dm_release(struct FsmInst *fi, int event, void *arg)
{
struct PStack *st = fi->userdata;
struct sk_buff *skb = arg;
if (get_PollFlagFree(st, skb)) {
stop_t200(st, 7);
if (!test_bit(FLG_L3_INIT, &st->l2.flag))
skb_queue_purge(&st->l2.i_queue);
if (test_bit(FLG_LAPB, &st->l2.flag))
st->l2.l2l1(st, PH_DEACTIVATE | REQUEST, NULL);
st5_dl_release_l2l3(st);
FsmChangeState(fi, ST_L2_4);
}
}
static void
l2_st6_dm_release(struct FsmInst *fi, int event, void *arg)
{
struct PStack *st = fi->userdata;
struct sk_buff *skb = arg;
if (get_PollFlagFree(st, skb)) {
stop_t200(st, 8);
lapb_dl_release_l2l3(st, CONFIRM);
FsmChangeState(fi, ST_L2_4);
}
}
static inline void
enquiry_cr(struct PStack *st, u_char typ, u_char cr, u_char pf)
{
struct sk_buff *skb;
struct Layer2 *l2;
u_char tmp[MAX_HEADER_LEN];
int i;
l2 = &st->l2;
i = sethdraddr(l2, tmp, cr);
if (test_bit(FLG_MOD128, &l2->flag)) {
tmp[i++] = typ;
tmp[i++] = (l2->vr << 1) | (pf ? 1 : 0);
} else
tmp[i++] = (l2->vr << 5) | typ | (pf ? 0x10 : 0);
if (!(skb = alloc_skb(i, GFP_ATOMIC))) {
printk(KERN_WARNING "isdl2 can't alloc sbbuff for enquiry_cr\n");
return;
}
memcpy(skb_put(skb, i), tmp, i);
enqueue_super(st, skb);
}
static inline void
enquiry_response(struct PStack *st)
{
if (test_bit(FLG_OWN_BUSY, &st->l2.flag))
enquiry_cr(st, RNR, RSP, 1);
else
enquiry_cr(st, RR, RSP, 1);
test_and_clear_bit(FLG_ACK_PEND, &st->l2.flag);
}
static inline void
transmit_enquiry(struct PStack *st)
{
if (test_bit(FLG_OWN_BUSY, &st->l2.flag))
enquiry_cr(st, RNR, CMD, 1);
else
enquiry_cr(st, RR, CMD, 1);
test_and_clear_bit(FLG_ACK_PEND, &st->l2.flag);
start_t200(st, 9);
}
static void
nrerrorrecovery(struct FsmInst *fi)
{
struct PStack *st = fi->userdata;
st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'J');
establishlink(fi);
test_and_clear_bit(FLG_L3_INIT, &st->l2.flag);
}
static void
invoke_retransmission(struct PStack *st, unsigned int nr)
{
struct Layer2 *l2 = &st->l2;
u_int p1;
u_long flags;
spin_lock_irqsave(&l2->lock, flags);
if (l2->vs != nr) {
while (l2->vs != nr) {
(l2->vs)--;
if(test_bit(FLG_MOD128, &l2->flag)) {
l2->vs %= 128;
p1 = (l2->vs - l2->va) % 128;
} else {
l2->vs %= 8;
p1 = (l2->vs - l2->va) % 8;
}
p1 = (p1 + l2->sow) % l2->window;
if (test_bit(FLG_LAPB, &l2->flag))
st->l1.bcs->tx_cnt += l2->windowar[p1]->len + l2headersize(l2, 0);
skb_queue_head(&l2->i_queue, l2->windowar[p1]);
l2->windowar[p1] = NULL;
}
spin_unlock_irqrestore(&l2->lock, flags);
st->l2.l2l1(st, PH_PULL | REQUEST, NULL);
return;
}
spin_unlock_irqrestore(&l2->lock, flags);
}
static void
l2_st7_got_super(struct FsmInst *fi, int event, void *arg)
{
struct PStack *st = fi->userdata;
struct sk_buff *skb = arg;
int PollFlag, rsp, typ = RR;
unsigned int nr;
struct Layer2 *l2 = &st->l2;
rsp = *skb->data & 0x2;
if (test_bit(FLG_ORIG, &l2->flag))
rsp = !rsp;
skb_pull(skb, l2addrsize(l2));
if (IsRNR(skb->data, st)) {
set_peer_busy(l2);
typ = RNR;
} else
clear_peer_busy(l2);
if (IsREJ(skb->data, st))
typ = REJ;
if (test_bit(FLG_MOD128, &l2->flag)) {
PollFlag = (skb->data[1] & 0x1) == 0x1;
nr = skb->data[1] >> 1;
} else {
PollFlag = (skb->data[0] & 0x10);
nr = (skb->data[0] >> 5) & 0x7;
}
dev_kfree_skb(skb);
if (PollFlag) {
if (rsp)
st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'A');
else
enquiry_response(st);
}
if (legalnr(st, nr)) {
if (typ == REJ) {
setva(st, nr);
invoke_retransmission(st, nr);
stop_t200(st, 10);
if (FsmAddTimer(&st->l2.t203, st->l2.T203,
EV_L2_T203, NULL, 6))
l2m_debug(&st->l2.l2m, "Restart T203 ST7 REJ");
} else if ((nr == l2->vs) && (typ == RR)) {
setva(st, nr);
stop_t200(st, 11);
FsmRestartTimer(&st->l2.t203, st->l2.T203,
EV_L2_T203, NULL, 7);
} else if ((l2->va != nr) || (typ == RNR)) {
setva(st, nr);
if(typ != RR) FsmDelTimer(&st->l2.t203, 9);
restart_t200(st, 12);
}
if (!skb_queue_empty(&st->l2.i_queue) && (typ == RR))
st->l2.l2l1(st, PH_PULL | REQUEST, NULL);
} else
nrerrorrecovery(fi);
}
static void
l2_feed_i_if_reest(struct FsmInst *fi, int event, void *arg)
{
struct PStack *st = fi->userdata;
struct sk_buff *skb = arg;
if (test_bit(FLG_LAPB, &st->l2.flag))
st->l1.bcs->tx_cnt += skb->len + l2headersize(&st->l2, 0);
if (!test_bit(FLG_L3_INIT, &st->l2.flag))
skb_queue_tail(&st->l2.i_queue, skb);
else
dev_kfree_skb(skb);
}
static void
l2_feed_i_pull(struct FsmInst *fi, int event, void *arg)
{
struct PStack *st = fi->userdata;
struct sk_buff *skb = arg;
if (test_bit(FLG_LAPB, &st->l2.flag))
st->l1.bcs->tx_cnt += skb->len + l2headersize(&st->l2, 0);
skb_queue_tail(&st->l2.i_queue, skb);
st->l2.l2l1(st, PH_PULL | REQUEST, NULL);
}
static void
l2_feed_iqueue(struct FsmInst *fi, int event, void *arg)
{
struct PStack *st = fi->userdata;
struct sk_buff *skb = arg;
if (test_bit(FLG_LAPB, &st->l2.flag))
st->l1.bcs->tx_cnt += skb->len + l2headersize(&st->l2, 0);
skb_queue_tail(&st->l2.i_queue, skb);
}
static void
l2_got_iframe(struct FsmInst *fi, int event, void *arg)
{
struct PStack *st = fi->userdata;
struct sk_buff *skb = arg;
struct Layer2 *l2 = &(st->l2);
int PollFlag, ns, i;
unsigned int nr;
i = l2addrsize(l2);
if (test_bit(FLG_MOD128, &l2->flag)) {
PollFlag = ((skb->data[i + 1] & 0x1) == 0x1);
ns = skb->data[i] >> 1;
nr = (skb->data[i + 1] >> 1) & 0x7f;
} else {
PollFlag = (skb->data[i] & 0x10);
ns = (skb->data[i] >> 1) & 0x7;
nr = (skb->data[i] >> 5) & 0x7;
}
if (test_bit(FLG_OWN_BUSY, &l2->flag)) {
dev_kfree_skb(skb);
if(PollFlag) enquiry_response(st);
} else if (l2->vr == ns) {
(l2->vr)++;
if(test_bit(FLG_MOD128, &l2->flag))
l2->vr %= 128;
else
l2->vr %= 8;
test_and_clear_bit(FLG_REJEXC, &l2->flag);
if (PollFlag)
enquiry_response(st);
else
test_and_set_bit(FLG_ACK_PEND, &l2->flag);
skb_pull(skb, l2headersize(l2, 0));
st->l2.l2l3(st, DL_DATA | INDICATION, skb);
} else {
/* n(s)!=v(r) */
dev_kfree_skb(skb);
if (test_and_set_bit(FLG_REJEXC, &l2->flag)) {
if (PollFlag)
enquiry_response(st);
} else {
enquiry_cr(st, REJ, RSP, PollFlag);
test_and_clear_bit(FLG_ACK_PEND, &l2->flag);
}
}
if (legalnr(st, nr)) {
if (!test_bit(FLG_PEER_BUSY, &st->l2.flag) && (fi->state == ST_L2_7)) {
if (nr == st->l2.vs) {
stop_t200(st, 13);
FsmRestartTimer(&st->l2.t203, st->l2.T203,
EV_L2_T203, NULL, 7);
} else if (nr != st->l2.va)
restart_t200(st, 14);
}
setva(st, nr);
} else {
nrerrorrecovery(fi);
return;
}
if (!skb_queue_empty(&st->l2.i_queue) && (fi->state == ST_L2_7))
st->l2.l2l1(st, PH_PULL | REQUEST, NULL);
if (test_and_clear_bit(FLG_ACK_PEND, &st->l2.flag))
enquiry_cr(st, RR, RSP, 0);
}
static void
l2_got_tei(struct FsmInst *fi, int event, void *arg)
{
struct PStack *st = fi->userdata;
st->l2.tei = (long) arg;
if (fi->state == ST_L2_3) {
establishlink(fi);
test_and_set_bit(FLG_L3_INIT, &st->l2.flag);
} else
FsmChangeState(fi, ST_L2_4);
if (!skb_queue_empty(&st->l2.ui_queue))
tx_ui(st);
}
static void
l2_st5_tout_200(struct FsmInst *fi, int event, void *arg)
{
struct PStack *st = fi->userdata;
if (test_bit(FLG_LAPD, &st->l2.flag) &&
test_bit(FLG_DCHAN_BUSY, &st->l2.flag)) {
FsmAddTimer(&st->l2.t200, st->l2.T200, EV_L2_T200, NULL, 9);
} else if (st->l2.rc == st->l2.N200) {
FsmChangeState(fi, ST_L2_4);
test_and_clear_bit(FLG_T200_RUN, &st->l2.flag);
skb_queue_purge(&st->l2.i_queue);
st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'G');
if (test_bit(FLG_LAPB, &st->l2.flag))
st->l2.l2l1(st, PH_DEACTIVATE | REQUEST, NULL);
st5_dl_release_l2l3(st);
} else {
st->l2.rc++;
FsmAddTimer(&st->l2.t200, st->l2.T200, EV_L2_T200, NULL, 9);
send_uframe(st, (test_bit(FLG_MOD128, &st->l2.flag) ? SABME : SABM)
| 0x10, CMD);
}
}
static void
l2_st6_tout_200(struct FsmInst *fi, int event, void *arg)
{
struct PStack *st = fi->userdata;
if (test_bit(FLG_LAPD, &st->l2.flag) &&
test_bit(FLG_DCHAN_BUSY, &st->l2.flag)) {
FsmAddTimer(&st->l2.t200, st->l2.T200, EV_L2_T200, NULL, 9);
} else if (st->l2.rc == st->l2.N200) {
FsmChangeState(fi, ST_L2_4);
test_and_clear_bit(FLG_T200_RUN, &st->l2.flag);
st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'H');
lapb_dl_release_l2l3(st, CONFIRM);
} else {
st->l2.rc++;
FsmAddTimer(&st->l2.t200, st->l2.T200, EV_L2_T200,
NULL, 9);
send_uframe(st, DISC | 0x10, CMD);
}
}
static void
l2_st7_tout_200(struct FsmInst *fi, int event, void *arg)
{
struct PStack *st = fi->userdata;
if (test_bit(FLG_LAPD, &st->l2.flag) &&
test_bit(FLG_DCHAN_BUSY, &st->l2.flag)) {
FsmAddTimer(&st->l2.t200, st->l2.T200, EV_L2_T200, NULL, 9);
return;
}
test_and_clear_bit(FLG_T200_RUN, &st->l2.flag);
st->l2.rc = 0;
FsmChangeState(fi, ST_L2_8);
transmit_enquiry(st);
st->l2.rc++;
}
static void
l2_st8_tout_200(struct FsmInst *fi, int event, void *arg)
{
struct PStack *st = fi->userdata;
if (test_bit(FLG_LAPD, &st->l2.flag) &&
test_bit(FLG_DCHAN_BUSY, &st->l2.flag)) {
FsmAddTimer(&st->l2.t200, st->l2.T200, EV_L2_T200, NULL, 9);
return;
}
test_and_clear_bit(FLG_T200_RUN, &st->l2.flag);
if (st->l2.rc == st->l2.N200) {
st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'I');
establishlink(fi);
test_and_clear_bit(FLG_L3_INIT, &st->l2.flag);
} else {
transmit_enquiry(st);
st->l2.rc++;
}
}
static void
l2_st7_tout_203(struct FsmInst *fi, int event, void *arg)
{
struct PStack *st = fi->userdata;
if (test_bit(FLG_LAPD, &st->l2.flag) &&
test_bit(FLG_DCHAN_BUSY, &st->l2.flag)) {
FsmAddTimer(&st->l2.t203, st->l2.T203, EV_L2_T203, NULL, 9);
return;
}
FsmChangeState(fi, ST_L2_8);
transmit_enquiry(st);
st->l2.rc = 0;
}
static void
l2_pull_iqueue(struct FsmInst *fi, int event, void *arg)
{
struct PStack *st = fi->userdata;
struct sk_buff *skb, *oskb;
struct Layer2 *l2 = &st->l2;
u_char header[MAX_HEADER_LEN];
int i;
int unsigned p1;
u_long flags;
if (!cansend(st))
return;
skb = skb_dequeue(&l2->i_queue);
if (!skb)
return;
spin_lock_irqsave(&l2->lock, flags);
if(test_bit(FLG_MOD128, &l2->flag))
p1 = (l2->vs - l2->va) % 128;
else
p1 = (l2->vs - l2->va) % 8;
p1 = (p1 + l2->sow) % l2->window;
if (l2->windowar[p1]) {
printk(KERN_WARNING "isdnl2 try overwrite ack queue entry %d\n",
p1);
dev_kfree_skb(l2->windowar[p1]);
}
l2->windowar[p1] = skb_clone(skb, GFP_ATOMIC);
i = sethdraddr(&st->l2, header, CMD);
if (test_bit(FLG_MOD128, &l2->flag)) {
header[i++] = l2->vs << 1;
header[i++] = l2->vr << 1;
l2->vs = (l2->vs + 1) % 128;
} else {
header[i++] = (l2->vr << 5) | (l2->vs << 1);
l2->vs = (l2->vs + 1) % 8;
}
spin_unlock_irqrestore(&l2->lock, flags);
p1 = skb->data - skb->head;
if (p1 >= i)
memcpy(skb_push(skb, i), header, i);
else {
printk(KERN_WARNING
"isdl2 pull_iqueue skb header(%d/%d) too short\n", i, p1);
oskb = skb;
skb = alloc_skb(oskb->len + i, GFP_ATOMIC);
memcpy(skb_put(skb, i), header, i);
skb_copy_from_linear_data(oskb,
skb_put(skb, oskb->len), oskb->len);
dev_kfree_skb(oskb);
}
st->l2.l2l1(st, PH_PULL | INDICATION, skb);
test_and_clear_bit(FLG_ACK_PEND, &st->l2.flag);
if (!test_and_set_bit(FLG_T200_RUN, &st->l2.flag)) {
FsmDelTimer(&st->l2.t203, 13);
FsmAddTimer(&st->l2.t200, st->l2.T200, EV_L2_T200, NULL, 11);
}
if (!skb_queue_empty(&l2->i_queue) && cansend(st))
st->l2.l2l1(st, PH_PULL | REQUEST, NULL);
}
static void
l2_st8_got_super(struct FsmInst *fi, int event, void *arg)
{
struct PStack *st = fi->userdata;
struct sk_buff *skb = arg;
int PollFlag, rsp, rnr = 0;
unsigned int nr;
struct Layer2 *l2 = &st->l2;
rsp = *skb->data & 0x2;
if (test_bit(FLG_ORIG, &l2->flag))
rsp = !rsp;
skb_pull(skb, l2addrsize(l2));
if (IsRNR(skb->data, st)) {
set_peer_busy(l2);
rnr = 1;
} else
clear_peer_busy(l2);
if (test_bit(FLG_MOD128, &l2->flag)) {
PollFlag = (skb->data[1] & 0x1) == 0x1;
nr = skb->data[1] >> 1;
} else {
PollFlag = (skb->data[0] & 0x10);
nr = (skb->data[0] >> 5) & 0x7;
}
dev_kfree_skb(skb);
if (rsp && PollFlag) {
if (legalnr(st, nr)) {
if (rnr) {
restart_t200(st, 15);
} else {
stop_t200(st, 16);
FsmAddTimer(&l2->t203, l2->T203,
EV_L2_T203, NULL, 5);
setva(st, nr);
}
invoke_retransmission(st, nr);
FsmChangeState(fi, ST_L2_7);
if (!skb_queue_empty(&l2->i_queue) && cansend(st))
st->l2.l2l1(st, PH_PULL | REQUEST, NULL);
} else
nrerrorrecovery(fi);
} else {
if (!rsp && PollFlag)
enquiry_response(st);
if (legalnr(st, nr)) {
setva(st, nr);
} else
nrerrorrecovery(fi);
}
}
static void
l2_got_FRMR(struct FsmInst *fi, int event, void *arg)
{
struct PStack *st = fi->userdata;
struct sk_buff *skb = arg;
skb_pull(skb, l2addrsize(&st->l2) + 1);
if (!(skb->data[0] & 1) || ((skb->data[0] & 3) == 1) || /* I or S */
(IsUA(skb->data) && (fi->state == ST_L2_7))) {
st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'K');
establishlink(fi);
test_and_clear_bit(FLG_L3_INIT, &st->l2.flag);
}
dev_kfree_skb(skb);
}
static void
l2_st24_tei_remove(struct FsmInst *fi, int event, void *arg)
{
struct PStack *st = fi->userdata;
skb_queue_purge(&st->l2.ui_queue);
st->l2.tei = -1;
FsmChangeState(fi, ST_L2_1);
}
static void
l2_st3_tei_remove(struct FsmInst *fi, int event, void *arg)
{
struct PStack *st = fi->userdata;
skb_queue_purge(&st->l2.ui_queue);
st->l2.tei = -1;
st->l2.l2l3(st, DL_RELEASE | INDICATION, NULL);
FsmChangeState(fi, ST_L2_1);
}
static void
l2_st5_tei_remove(struct FsmInst *fi, int event, void *arg)
{
struct PStack *st = fi->userdata;
skb_queue_purge(&st->l2.i_queue);
skb_queue_purge(&st->l2.ui_queue);
freewin(st);
st->l2.tei = -1;
stop_t200(st, 17);
st5_dl_release_l2l3(st);
FsmChangeState(fi, ST_L2_1);
}
static void
l2_st6_tei_remove(struct FsmInst *fi, int event, void *arg)
{
struct PStack *st = fi->userdata;
skb_queue_purge(&st->l2.ui_queue);
st->l2.tei = -1;
stop_t200(st, 18);
st->l2.l2l3(st, DL_RELEASE | CONFIRM, NULL);
FsmChangeState(fi, ST_L2_1);
}
static void
l2_tei_remove(struct FsmInst *fi, int event, void *arg)
{
struct PStack *st = fi->userdata;
skb_queue_purge(&st->l2.i_queue);
skb_queue_purge(&st->l2.ui_queue);
freewin(st);
st->l2.tei = -1;
stop_t200(st, 17);
FsmDelTimer(&st->l2.t203, 19);
st->l2.l2l3(st, DL_RELEASE | INDICATION, NULL);
FsmChangeState(fi, ST_L2_1);
}
static void
l2_st14_persistent_da(struct FsmInst *fi, int event, void *arg)
{
struct PStack *st = fi->userdata;
skb_queue_purge(&st->l2.i_queue);
skb_queue_purge(&st->l2.ui_queue);
if (test_and_clear_bit(FLG_ESTAB_PEND, &st->l2.flag))
st->l2.l2l3(st, DL_RELEASE | INDICATION, NULL);
}
static void
l2_st5_persistent_da(struct FsmInst *fi, int event, void *arg)
{
struct PStack *st = fi->userdata;
skb_queue_purge(&st->l2.i_queue);
skb_queue_purge(&st->l2.ui_queue);
freewin(st);
stop_t200(st, 19);
st5_dl_release_l2l3(st);
FsmChangeState(fi, ST_L2_4);
}
static void
l2_st6_persistent_da(struct FsmInst *fi, int event, void *arg)
{
struct PStack *st = fi->userdata;
skb_queue_purge(&st->l2.ui_queue);
stop_t200(st, 20);
st->l2.l2l3(st, DL_RELEASE | CONFIRM, NULL);
FsmChangeState(fi, ST_L2_4);
}
static void
l2_persistent_da(struct FsmInst *fi, int event, void *arg)
{
struct PStack *st = fi->userdata;
skb_queue_purge(&st->l2.i_queue);
skb_queue_purge(&st->l2.ui_queue);
freewin(st);
stop_t200(st, 19);
FsmDelTimer(&st->l2.t203, 19);
st->l2.l2l3(st, DL_RELEASE | INDICATION, NULL);
FsmChangeState(fi, ST_L2_4);
}
static void
l2_set_own_busy(struct FsmInst *fi, int event, void *arg)
{
struct PStack *st = fi->userdata;
if(!test_and_set_bit(FLG_OWN_BUSY, &st->l2.flag)) {
enquiry_cr(st, RNR, RSP, 0);
test_and_clear_bit(FLG_ACK_PEND, &st->l2.flag);
}
}
static void
l2_clear_own_busy(struct FsmInst *fi, int event, void *arg)
{
struct PStack *st = fi->userdata;
if(!test_and_clear_bit(FLG_OWN_BUSY, &st->l2.flag)) {
enquiry_cr(st, RR, RSP, 0);
test_and_clear_bit(FLG_ACK_PEND, &st->l2.flag);
}
}
static void
l2_frame_error(struct FsmInst *fi, int event, void *arg)
{
struct PStack *st = fi->userdata;
st->ma.layer(st, MDL_ERROR | INDICATION, arg);
}
static void
l2_frame_error_reest(struct FsmInst *fi, int event, void *arg)
{
struct PStack *st = fi->userdata;
st->ma.layer(st, MDL_ERROR | INDICATION, arg);
establishlink(fi);
test_and_clear_bit(FLG_L3_INIT, &st->l2.flag);
}
static struct FsmNode L2FnList[] __initdata =
{
{ST_L2_1, EV_L2_DL_ESTABLISH_REQ, l2_mdl_assign},
{ST_L2_2, EV_L2_DL_ESTABLISH_REQ, l2_go_st3},
{ST_L2_4, EV_L2_DL_ESTABLISH_REQ, l2_establish},
{ST_L2_5, EV_L2_DL_ESTABLISH_REQ, l2_discard_i_setl3},
{ST_L2_7, EV_L2_DL_ESTABLISH_REQ, l2_l3_reestablish},
{ST_L2_8, EV_L2_DL_ESTABLISH_REQ, l2_l3_reestablish},
{ST_L2_4, EV_L2_DL_RELEASE_REQ, l2_release},
{ST_L2_5, EV_L2_DL_RELEASE_REQ, l2_pend_rel},
{ST_L2_7, EV_L2_DL_RELEASE_REQ, l2_disconnect},
{ST_L2_8, EV_L2_DL_RELEASE_REQ, l2_disconnect},
{ST_L2_5, EV_L2_DL_DATA, l2_feed_i_if_reest},
{ST_L2_7, EV_L2_DL_DATA, l2_feed_i_pull},
{ST_L2_8, EV_L2_DL_DATA, l2_feed_iqueue},
{ST_L2_1, EV_L2_DL_UNIT_DATA, l2_queue_ui_assign},
{ST_L2_2, EV_L2_DL_UNIT_DATA, l2_queue_ui},
{ST_L2_3, EV_L2_DL_UNIT_DATA, l2_queue_ui},
{ST_L2_4, EV_L2_DL_UNIT_DATA, l2_send_ui},
{ST_L2_5, EV_L2_DL_UNIT_DATA, l2_send_ui},
{ST_L2_6, EV_L2_DL_UNIT_DATA, l2_send_ui},
{ST_L2_7, EV_L2_DL_UNIT_DATA, l2_send_ui},
{ST_L2_8, EV_L2_DL_UNIT_DATA, l2_send_ui},
{ST_L2_1, EV_L2_MDL_ASSIGN, l2_got_tei},
{ST_L2_2, EV_L2_MDL_ASSIGN, l2_got_tei},
{ST_L2_3, EV_L2_MDL_ASSIGN, l2_got_tei},
{ST_L2_2, EV_L2_MDL_ERROR, l2_st24_tei_remove},
{ST_L2_3, EV_L2_MDL_ERROR, l2_st3_tei_remove},
{ST_L2_4, EV_L2_MDL_REMOVE, l2_st24_tei_remove},
{ST_L2_5, EV_L2_MDL_REMOVE, l2_st5_tei_remove},
{ST_L2_6, EV_L2_MDL_REMOVE, l2_st6_tei_remove},
{ST_L2_7, EV_L2_MDL_REMOVE, l2_tei_remove},
{ST_L2_8, EV_L2_MDL_REMOVE, l2_tei_remove},
{ST_L2_4, EV_L2_SABME, l2_start_multi},
{ST_L2_5, EV_L2_SABME, l2_send_UA},
{ST_L2_6, EV_L2_SABME, l2_send_DM},
{ST_L2_7, EV_L2_SABME, l2_restart_multi},
{ST_L2_8, EV_L2_SABME, l2_restart_multi},
{ST_L2_4, EV_L2_DISC, l2_send_DM},
{ST_L2_5, EV_L2_DISC, l2_send_DM},
{ST_L2_6, EV_L2_DISC, l2_send_UA},
{ST_L2_7, EV_L2_DISC, l2_stop_multi},
{ST_L2_8, EV_L2_DISC, l2_stop_multi},
{ST_L2_4, EV_L2_UA, l2_mdl_error_ua},
{ST_L2_5, EV_L2_UA, l2_connected},
{ST_L2_6, EV_L2_UA, l2_released},
{ST_L2_7, EV_L2_UA, l2_mdl_error_ua},
{ST_L2_8, EV_L2_UA, l2_mdl_error_ua},
{ST_L2_4, EV_L2_DM, l2_reestablish},
{ST_L2_5, EV_L2_DM, l2_st5_dm_release},
{ST_L2_6, EV_L2_DM, l2_st6_dm_release},
{ST_L2_7, EV_L2_DM, l2_mdl_error_dm},
{ST_L2_8, EV_L2_DM, l2_st8_mdl_error_dm},
{ST_L2_1, EV_L2_UI, l2_got_ui},
{ST_L2_2, EV_L2_UI, l2_got_ui},
{ST_L2_3, EV_L2_UI, l2_got_ui},
{ST_L2_4, EV_L2_UI, l2_got_ui},
{ST_L2_5, EV_L2_UI, l2_got_ui},
{ST_L2_6, EV_L2_UI, l2_got_ui},
{ST_L2_7, EV_L2_UI, l2_got_ui},
{ST_L2_8, EV_L2_UI, l2_got_ui},
{ST_L2_7, EV_L2_FRMR, l2_got_FRMR},
{ST_L2_8, EV_L2_FRMR, l2_got_FRMR},
{ST_L2_7, EV_L2_SUPER, l2_st7_got_super},
{ST_L2_8, EV_L2_SUPER, l2_st8_got_super},
{ST_L2_7, EV_L2_I, l2_got_iframe},
{ST_L2_8, EV_L2_I, l2_got_iframe},
{ST_L2_5, EV_L2_T200, l2_st5_tout_200},
{ST_L2_6, EV_L2_T200, l2_st6_tout_200},
{ST_L2_7, EV_L2_T200, l2_st7_tout_200},
{ST_L2_8, EV_L2_T200, l2_st8_tout_200},
{ST_L2_7, EV_L2_T203, l2_st7_tout_203},
{ST_L2_7, EV_L2_ACK_PULL, l2_pull_iqueue},
{ST_L2_7, EV_L2_SET_OWN_BUSY, l2_set_own_busy},
{ST_L2_8, EV_L2_SET_OWN_BUSY, l2_set_own_busy},
{ST_L2_7, EV_L2_CLEAR_OWN_BUSY, l2_clear_own_busy},
{ST_L2_8, EV_L2_CLEAR_OWN_BUSY, l2_clear_own_busy},
{ST_L2_4, EV_L2_FRAME_ERROR, l2_frame_error},
{ST_L2_5, EV_L2_FRAME_ERROR, l2_frame_error},
{ST_L2_6, EV_L2_FRAME_ERROR, l2_frame_error},
{ST_L2_7, EV_L2_FRAME_ERROR, l2_frame_error_reest},
{ST_L2_8, EV_L2_FRAME_ERROR, l2_frame_error_reest},
{ST_L2_1, EV_L1_DEACTIVATE, l2_st14_persistent_da},
{ST_L2_2, EV_L1_DEACTIVATE, l2_st24_tei_remove},
{ST_L2_3, EV_L1_DEACTIVATE, l2_st3_tei_remove},
{ST_L2_4, EV_L1_DEACTIVATE, l2_st14_persistent_da},
{ST_L2_5, EV_L1_DEACTIVATE, l2_st5_persistent_da},
{ST_L2_6, EV_L1_DEACTIVATE, l2_st6_persistent_da},
{ST_L2_7, EV_L1_DEACTIVATE, l2_persistent_da},
{ST_L2_8, EV_L1_DEACTIVATE, l2_persistent_da},
};
static void
isdnl2_l1l2(struct PStack *st, int pr, void *arg)
{
struct sk_buff *skb = arg;
u_char *datap;
int ret = 1, len;
int c = 0;
switch (pr) {
case (PH_DATA | INDICATION):
datap = skb->data;
len = l2addrsize(&st->l2);
if (skb->len > len)
datap += len;
else {
FsmEvent(&st->l2.l2m, EV_L2_FRAME_ERROR, (void *) 'N');
dev_kfree_skb(skb);
return;
}
if (!(*datap & 1)) { /* I-Frame */
if(!(c = iframe_error(st, skb)))
ret = FsmEvent(&st->l2.l2m, EV_L2_I, skb);
} else if (IsSFrame(datap, st)) { /* S-Frame */
if(!(c = super_error(st, skb)))
ret = FsmEvent(&st->l2.l2m, EV_L2_SUPER, skb);
} else if (IsUI(datap)) {
if(!(c = UI_error(st, skb)))
ret = FsmEvent(&st->l2.l2m, EV_L2_UI, skb);
} else if (IsSABME(datap, st)) {
if(!(c = unnum_error(st, skb, CMD)))
ret = FsmEvent(&st->l2.l2m, EV_L2_SABME, skb);
} else if (IsUA(datap)) {
if(!(c = unnum_error(st, skb, RSP)))
ret = FsmEvent(&st->l2.l2m, EV_L2_UA, skb);
} else if (IsDISC(datap)) {
if(!(c = unnum_error(st, skb, CMD)))
ret = FsmEvent(&st->l2.l2m, EV_L2_DISC, skb);
} else if (IsDM(datap)) {
if(!(c = unnum_error(st, skb, RSP)))
ret = FsmEvent(&st->l2.l2m, EV_L2_DM, skb);
} else if (IsFRMR(datap)) {
if(!(c = FRMR_error(st,skb)))
ret = FsmEvent(&st->l2.l2m, EV_L2_FRMR, skb);
} else {
FsmEvent(&st->l2.l2m, EV_L2_FRAME_ERROR, (void *) 'L');
dev_kfree_skb(skb);
ret = 0;
}
if(c) {
dev_kfree_skb(skb);
FsmEvent(&st->l2.l2m, EV_L2_FRAME_ERROR, (void *)(long)c);
ret = 0;
}
if (ret)
dev_kfree_skb(skb);
break;
case (PH_PULL | CONFIRM):
FsmEvent(&st->l2.l2m, EV_L2_ACK_PULL, arg);
break;
case (PH_PAUSE | INDICATION):
test_and_set_bit(FLG_DCHAN_BUSY, &st->l2.flag);
break;
case (PH_PAUSE | CONFIRM):
test_and_clear_bit(FLG_DCHAN_BUSY, &st->l2.flag);
break;
case (PH_ACTIVATE | CONFIRM):
case (PH_ACTIVATE | INDICATION):
test_and_set_bit(FLG_L1_ACTIV, &st->l2.flag);
if (test_and_clear_bit(FLG_ESTAB_PEND, &st->l2.flag))
FsmEvent(&st->l2.l2m, EV_L2_DL_ESTABLISH_REQ, arg);
break;
case (PH_DEACTIVATE | INDICATION):
case (PH_DEACTIVATE | CONFIRM):
test_and_clear_bit(FLG_L1_ACTIV, &st->l2.flag);
FsmEvent(&st->l2.l2m, EV_L1_DEACTIVATE, arg);
break;
default:
l2m_debug(&st->l2.l2m, "l2 unknown pr %04x", pr);
break;
}
}
static void
isdnl2_l3l2(struct PStack *st, int pr, void *arg)
{
switch (pr) {
case (DL_DATA | REQUEST):
if (FsmEvent(&st->l2.l2m, EV_L2_DL_DATA, arg)) {
dev_kfree_skb((struct sk_buff *) arg);
}
break;
case (DL_UNIT_DATA | REQUEST):
if (FsmEvent(&st->l2.l2m, EV_L2_DL_UNIT_DATA, arg)) {
dev_kfree_skb((struct sk_buff *) arg);
}
break;
case (DL_ESTABLISH | REQUEST):
if (test_bit(FLG_L1_ACTIV, &st->l2.flag)) {
if (test_bit(FLG_LAPD, &st->l2.flag) ||
test_bit(FLG_ORIG, &st->l2.flag)) {
FsmEvent(&st->l2.l2m, EV_L2_DL_ESTABLISH_REQ, arg);
}
} else {
if (test_bit(FLG_LAPD, &st->l2.flag) ||
test_bit(FLG_ORIG, &st->l2.flag)) {
test_and_set_bit(FLG_ESTAB_PEND, &st->l2.flag);
}
st->l2.l2l1(st, PH_ACTIVATE, NULL);
}
break;
case (DL_RELEASE | REQUEST):
if (test_bit(FLG_LAPB, &st->l2.flag)) {
st->l2.l2l1(st, PH_DEACTIVATE, NULL);
}
FsmEvent(&st->l2.l2m, EV_L2_DL_RELEASE_REQ, arg);
break;
case (MDL_ASSIGN | REQUEST):
FsmEvent(&st->l2.l2m, EV_L2_MDL_ASSIGN, arg);
break;
case (MDL_REMOVE | REQUEST):
FsmEvent(&st->l2.l2m, EV_L2_MDL_REMOVE, arg);
break;
case (MDL_ERROR | RESPONSE):
FsmEvent(&st->l2.l2m, EV_L2_MDL_ERROR, arg);
break;
}
}
void
releasestack_isdnl2(struct PStack *st)
{
FsmDelTimer(&st->l2.t200, 21);
FsmDelTimer(&st->l2.t203, 16);
skb_queue_purge(&st->l2.i_queue);
skb_queue_purge(&st->l2.ui_queue);
ReleaseWin(&st->l2);
}
static void
l2m_debug(struct FsmInst *fi, char *fmt, ...)
{
va_list args;
struct PStack *st = fi->userdata;
va_start(args, fmt);
VHiSax_putstatus(st->l1.hardware, st->l2.debug_id, fmt, args);
va_end(args);
}
void
setstack_isdnl2(struct PStack *st, char *debug_id)
{
spin_lock_init(&st->l2.lock);
st->l1.l1l2 = isdnl2_l1l2;
st->l3.l3l2 = isdnl2_l3l2;
skb_queue_head_init(&st->l2.i_queue);
skb_queue_head_init(&st->l2.ui_queue);
InitWin(&st->l2);
st->l2.debug = 0;
st->l2.l2m.fsm = &l2fsm;
if (test_bit(FLG_LAPB, &st->l2.flag))
st->l2.l2m.state = ST_L2_4;
else
st->l2.l2m.state = ST_L2_1;
st->l2.l2m.debug = 0;
st->l2.l2m.userdata = st;
st->l2.l2m.userint = 0;
st->l2.l2m.printdebug = l2m_debug;
strcpy(st->l2.debug_id, debug_id);
FsmInitTimer(&st->l2.l2m, &st->l2.t200);
FsmInitTimer(&st->l2.l2m, &st->l2.t203);
}
static void
transl2_l3l2(struct PStack *st, int pr, void *arg)
{
switch (pr) {
case (DL_DATA | REQUEST):
case (DL_UNIT_DATA | REQUEST):
st->l2.l2l1(st, PH_DATA | REQUEST, arg);
break;
case (DL_ESTABLISH | REQUEST):
st->l2.l2l1(st, PH_ACTIVATE | REQUEST, NULL);
break;
case (DL_RELEASE | REQUEST):
st->l2.l2l1(st, PH_DEACTIVATE | REQUEST, NULL);
break;
}
}
void
setstack_transl2(struct PStack *st)
{
st->l3.l3l2 = transl2_l3l2;
}
void
releasestack_transl2(struct PStack *st)
{
}
int __init
Isdnl2New(void)
{
l2fsm.state_count = L2_STATE_COUNT;
l2fsm.event_count = L2_EVENT_COUNT;
l2fsm.strEvent = strL2Event;
l2fsm.strState = strL2State;
return FsmNew(&l2fsm, L2FnList, ARRAY_SIZE(L2FnList));
}
void
Isdnl2Free(void)
{
FsmFree(&l2fsm);
}
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