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mISDN: Allow to set a minimum length for transparent data

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If the FIFO of the card is small, many short messages are queued up to
the upper layers and the userspace. This change allows the applications
to set a minimum datalen they want from the drivers.
Create a common control function to avoid code duplication in each
driver.

Signed-off-by: Karsten Keil <kkeil@linux-pingi.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Karsten Keil 2012-05-15 23:51:06 +00:00 committed by David S. Miller
parent 7206e659f6
commit 034005a011
12 changed files with 135 additions and 132 deletions
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35
drivers/isdn/hardware/mISDN/avmfritz.c
View File

@ -536,12 +536,12 @@ HDLC_irq(struct bchannel *bch, u32 stat)
hdlc_empty_fifo(bch, len);
if (!bch->rx_skb)
goto handle_tx;
if (test_bit(FLG_TRANSPARENT, &bch->Flags) ||
(stat & HDLC_STAT_RME)) {
if (((stat & HDLC_STAT_CRCVFRRAB) ==
HDLC_STAT_CRCVFR) ||
test_bit(FLG_TRANSPARENT, &bch->Flags)) {
recv_Bchannel(bch, 0);
if (test_bit(FLG_TRANSPARENT, &bch->Flags)) {
recv_Bchannel(bch, 0, false);
} else if (stat & HDLC_STAT_RME) {
if ((stat & HDLC_STAT_CRCVFRRAB) ==
HDLC_STAT_CRCVFR) {
recv_Bchannel(bch, 0, false);
} else {
pr_warning("%s: got invalid frame\n",
fc->name);
@ -809,21 +809,7 @@ init_card(struct fritzcard *fc)
static int
channel_bctrl(struct bchannel *bch, struct mISDN_ctrl_req *cq)
{
int ret = 0;
struct fritzcard *fc = bch->hw;
switch (cq->op) {
case MISDN_CTRL_GETOP:
cq->op = 0;
break;
/* Nothing implemented yet */
case MISDN_CTRL_FILL_EMPTY:
default:
pr_info("%s: %s unknown Op %x\n", fc->name, __func__, cq->op);
ret = -EINVAL;
break;
}
return ret;
return mISDN_ctrl_bchannel(bch, cq);
}
static int
@ -1019,6 +1005,7 @@ static int __devinit
setup_instance(struct fritzcard *card)
{
int i, err;
unsigned short minsize;
u_long flags;
snprintf(card->name, MISDN_MAX_IDLEN - 1, "AVM.%d", AVM_cnt + 1);
@ -1038,7 +1025,11 @@ setup_instance(struct fritzcard *card)
for (i = 0; i < 2; i++) {
card->bch[i].nr = i + 1;
set_channelmap(i + 1, card->isac.dch.dev.channelmap);
mISDN_initbchannel(&card->bch[i], MAX_DATA_MEM);
if (AVM_FRITZ_PCIV2 == card->type)
minsize = HDLC_FIFO_SIZE_V2;
else
minsize = HDLC_FIFO_SIZE_V1;
mISDN_initbchannel(&card->bch[i], MAX_DATA_MEM, minsize);
card->bch[i].hw = card;
card->bch[i].ch.send = avm_l2l1B;
card->bch[i].ch.ctrl = avm_bctrl;

17
drivers/isdn/hardware/mISDN/hfcmulti.c
View File

@ -2352,7 +2352,7 @@ hfcmulti_rx(struct hfc_multi *hc, int ch)
if (dch)
recv_Dchannel(dch);
else
recv_Bchannel(bch, MISDN_ID_ANY);
recv_Bchannel(bch, MISDN_ID_ANY, false);
*sp = skb;
again++;
goto next_frame;
@ -2367,7 +2367,7 @@ hfcmulti_rx(struct hfc_multi *hc, int ch)
"(z1=%04x, z2=%04x) TRANS\n",
__func__, hc->id + 1, ch, Zsize, z1, z2);
/* only bch is transparent */
recv_Bchannel(bch, hc->chan[ch].Zfill);
recv_Bchannel(bch, hc->chan[ch].Zfill, false);
}
}
@ -3574,8 +3574,9 @@ channel_bctrl(struct bchannel *bch, struct mISDN_ctrl_req *cq)
switch (cq->op) {
case MISDN_CTRL_GETOP:
cq->op = MISDN_CTRL_HFC_OP | MISDN_CTRL_HW_FEATURES_OP
| MISDN_CTRL_RX_OFF | MISDN_CTRL_FILL_EMPTY;
ret = mISDN_ctrl_bchannel(bch, cq);
cq->op |= MISDN_CTRL_HFC_OP | MISDN_CTRL_HW_FEATURES_OP |
MISDN_CTRL_RX_OFF | MISDN_CTRL_FILL_EMPTY;
break;
case MISDN_CTRL_RX_OFF: /* turn off / on rx stream */
hc->chan[bch->slot].rx_off = !!cq->p1;
@ -3683,9 +3684,7 @@ channel_bctrl(struct bchannel *bch, struct mISDN_ctrl_req *cq)
ret = -EINVAL;
break;
default:
printk(KERN_WARNING "%s: unknown Op %x\n",
__func__, cq->op);
ret = -EINVAL;
ret = mISDN_ctrl_bchannel(bch, cq);
break;
}
return ret;
@ -4855,7 +4854,7 @@ init_e1_port(struct hfc_multi *hc, struct hm_map *m, int pt)
bch->nr = ch;
bch->slot = ch;
bch->debug = debug;
mISDN_initbchannel(bch, MAX_DATA_MEM);
mISDN_initbchannel(bch, MAX_DATA_MEM, poll >> 1);
bch->hw = hc;
bch->ch.send = handle_bmsg;
bch->ch.ctrl = hfcm_bctrl;
@ -4928,7 +4927,7 @@ init_multi_port(struct hfc_multi *hc, int pt)
bch->nr = ch + 1;
bch->slot = i + ch;
bch->debug = debug;
mISDN_initbchannel(bch, MAX_DATA_MEM);
mISDN_initbchannel(bch, MAX_DATA_MEM, poll >> 1);
bch->hw = hc;
bch->ch.send = handle_bmsg;
bch->ch.ctrl = hfcm_bctrl;

12
drivers/isdn/hardware/mISDN/hfcpci.c
View File

@ -453,7 +453,7 @@ hfcpci_empty_bfifo(struct bchannel *bch, struct bzfifo *bz,
}
bz->za[new_f2].z2 = cpu_to_le16(new_z2);
bz->f2 = new_f2; /* next buffer */
recv_Bchannel(bch, MISDN_ID_ANY);
recv_Bchannel(bch, MISDN_ID_ANY, false);
}
}
@ -599,7 +599,7 @@ hfcpci_empty_fifo_trans(struct bchannel *bch, struct bzfifo *rxbz,
ptr1 = bdata; /* start of buffer */
memcpy(ptr, ptr1, fcnt_rx); /* rest */
}
recv_Bchannel(bch, fcnt_tx); /* bch, id */
recv_Bchannel(bch, fcnt_tx, false); /* bch, id, !force */
}
*z2r = cpu_to_le16(new_z2); /* new position */
}
@ -1535,7 +1535,8 @@ channel_bctrl(struct bchannel *bch, struct mISDN_ctrl_req *cq)
switch (cq->op) {
case MISDN_CTRL_GETOP:
cq->op = MISDN_CTRL_FILL_EMPTY;
ret = mISDN_ctrl_bchannel(bch, cq);
cq->op |= MISDN_CTRL_FILL_EMPTY;
break;
case MISDN_CTRL_FILL_EMPTY: /* fill fifo, if empty */
test_and_set_bit(FLG_FILLEMPTY, &bch->Flags);
@ -1544,8 +1545,7 @@ channel_bctrl(struct bchannel *bch, struct mISDN_ctrl_req *cq)
"off=%d)\n", __func__, bch->nr, !!cq->p1);
break;
default:
printk(KERN_WARNING "%s: unknown Op %x\n", __func__, cq->op);
ret = -EINVAL;
ret = mISDN_ctrl_bchannel(bch, cq);
break;
}
return ret;
@ -2116,7 +2116,7 @@ setup_card(struct hfc_pci *card)
card->bch[i].nr = i + 1;
set_channelmap(i + 1, card->dch.dev.channelmap);
card->bch[i].debug = debug;
mISDN_initbchannel(&card->bch[i], MAX_DATA_MEM);
mISDN_initbchannel(&card->bch[i], MAX_DATA_MEM, poll >> 1);
card->bch[i].hw = card;
card->bch[i].ch.send = hfcpci_l2l1B;
card->bch[i].ch.ctrl = hfc_bctrl;

14
drivers/isdn/hardware/mISDN/hfcsusb.c
View File

@ -810,7 +810,8 @@ channel_bctrl(struct bchannel *bch, struct mISDN_ctrl_req *cq)
switch (cq->op) {
case MISDN_CTRL_GETOP:
cq->op = MISDN_CTRL_FILL_EMPTY;
ret = mISDN_ctrl_bchannel(bch, cq);
cq->op |= MISDN_CTRL_FILL_EMPTY;
break;
case MISDN_CTRL_FILL_EMPTY: /* fill fifo, if empty */
test_and_set_bit(FLG_FILLEMPTY, &bch->Flags);
@ -819,8 +820,7 @@ channel_bctrl(struct bchannel *bch, struct mISDN_ctrl_req *cq)
"off=%d)\n", __func__, bch->nr, !!cq->p1);
break;
default:
printk(KERN_WARNING "%s: unknown Op %x\n", __func__, cq->op);
ret = -EINVAL;
ret = mISDN_ctrl_bchannel(bch, cq);
break;
}
return ret;
@ -931,7 +931,8 @@ hfcsusb_rx_frame(struct usb_fifo *fifo, __u8 *data, unsigned int len,
if (fifo->dch)
recv_Dchannel(fifo->dch);
if (fifo->bch)
recv_Bchannel(fifo->bch, MISDN_ID_ANY);
recv_Bchannel(fifo->bch, MISDN_ID_ANY,
0);
if (fifo->ech)
recv_Echannel(fifo->ech,
&hw->dch);
@ -952,8 +953,7 @@ hfcsusb_rx_frame(struct usb_fifo *fifo, __u8 *data, unsigned int len,
}
} else {
/* deliver transparent data to layer2 */
if (rx_skb->len >= poll)
recv_Bchannel(fifo->bch, MISDN_ID_ANY);
recv_Bchannel(fifo->bch, MISDN_ID_ANY, false);
}
spin_unlock(&hw->lock);
}
@ -1861,7 +1861,7 @@ setup_instance(struct hfcsusb *hw, struct device *parent)
hw->bch[i].nr = i + 1;
set_channelmap(i + 1, hw->dch.dev.channelmap);
hw->bch[i].debug = debug;
mISDN_initbchannel(&hw->bch[i], MAX_DATA_MEM);
mISDN_initbchannel(&hw->bch[i], MAX_DATA_MEM, poll >> 1);
hw->bch[i].hw = hw;
hw->bch[i].ch.send = hfcusb_l2l1B;
hw->bch[i].ch.ctrl = hfc_bctrl;

27
drivers/isdn/hardware/mISDN/mISDNipac.c
View File

@ -1063,7 +1063,7 @@ ipac_rme(struct hscx_hw *hx)
skb_trim(hx->bch.rx_skb, 0);
} else {
skb_trim(hx->bch.rx_skb, hx->bch.rx_skb->len - 1);
recv_Bchannel(&hx->bch, 0);
recv_Bchannel(&hx->bch, 0, false);
}
}
@ -1114,11 +1114,8 @@ ipac_irq(struct hscx_hw *hx, u8 ista)
if (istab & IPACX_B_RPF) {
hscx_empty_fifo(hx, hx->fifo_size);
if (test_bit(FLG_TRANSPARENT, &hx->bch.Flags)) {
/* receive transparent audio data */
if (hx->bch.rx_skb)
recv_Bchannel(&hx->bch, 0);
}
if (test_bit(FLG_TRANSPARENT, &hx->bch.Flags))
recv_Bchannel(&hx->bch, 0, false);
}
if (istab & IPACX_B_RFO) {
@ -1377,20 +1374,7 @@ hscx_l2l1(struct mISDNchannel *ch, struct sk_buff *skb)
static int
channel_bctrl(struct bchannel *bch, struct mISDN_ctrl_req *cq)
{
int ret = 0;
switch (cq->op) {
case MISDN_CTRL_GETOP:
cq->op = 0;
break;
/* Nothing implemented yet */
case MISDN_CTRL_FILL_EMPTY:
default:
pr_info("%s: unknown Op %x\n", __func__, cq->op);
ret = -EINVAL;
break;
}
return ret;
return mISDN_ctrl_bchannel(bch, cq);
}
static int
@ -1608,7 +1592,8 @@ mISDNipac_init(struct ipac_hw *ipac, void *hw)
set_channelmap(i + 1, ipac->isac.dch.dev.channelmap);
list_add(&ipac->hscx[i].bch.ch.list,
&ipac->isac.dch.dev.bchannels);
mISDN_initbchannel(&ipac->hscx[i].bch, MAX_DATA_MEM);
mISDN_initbchannel(&ipac->hscx[i].bch, MAX_DATA_MEM,
ipac->hscx[i].fifo_size);
ipac->hscx[i].bch.ch.nr = i + 1;
ipac->hscx[i].bch.ch.send = &hscx_l2l1;
ipac->hscx[i].bch.ch.ctrl = hscx_bctrl;

25
drivers/isdn/hardware/mISDN/mISDNisar.c
View File

@ -446,7 +446,7 @@ isar_rcv_frame(struct isar_ch *ch)
break;
}
rcv_mbox(ch->is, skb_put(ch->bch.rx_skb, ch->is->clsb));
recv_Bchannel(&ch->bch, 0);
recv_Bchannel(&ch->bch, 0, false);
break;
case ISDN_P_B_HDLC:
maxlen = bchannel_get_rxbuf(&ch->bch, ch->is->clsb);
@ -481,7 +481,7 @@ isar_rcv_frame(struct isar_ch *ch)
break;
}
skb_trim(ch->bch.rx_skb, ch->bch.rx_skb->len - 2);
recv_Bchannel(&ch->bch, 0);
recv_Bchannel(&ch->bch, 0, false);
}
break;
case ISDN_P_B_T30_FAX:
@ -517,7 +517,7 @@ isar_rcv_frame(struct isar_ch *ch)
ch->state = STFAX_ESCAPE;
/* set_skb_flag(skb, DF_NOMOREDATA); */
}
recv_Bchannel(&ch->bch, 0);
recv_Bchannel(&ch->bch, 0, false);
if (ch->is->cmsb & SART_NMD)
deliver_status(ch, HW_MOD_NOCARR);
break;
@ -557,7 +557,7 @@ isar_rcv_frame(struct isar_ch *ch)
break;
}
skb_trim(ch->bch.rx_skb, ch->bch.rx_skb->len - 2);
recv_Bchannel(&ch->bch, 0);
recv_Bchannel(&ch->bch, 0, false);
}
if (ch->is->cmsb & SART_NMD) { /* ABORT */
pr_debug("%s: isar_rcv_frame: no more data\n",
@ -1554,20 +1554,7 @@ isar_l2l1(struct mISDNchannel *ch, struct sk_buff *skb)
static int
channel_bctrl(struct bchannel *bch, struct mISDN_ctrl_req *cq)
{
int ret = 0;
switch (cq->op) {
case MISDN_CTRL_GETOP:
cq->op = 0;
break;
/* Nothing implemented yet */
case MISDN_CTRL_FILL_EMPTY:
default:
pr_info("%s: unknown Op %x\n", __func__, cq->op);
ret = -EINVAL;
break;
}
return ret;
return mISDN_ctrl_bchannel(bch, cq);
}
static int
@ -1665,7 +1652,7 @@ mISDNisar_init(struct isar_hw *isar, void *hw)
isar->hw = hw;
for (i = 0; i < 2; i++) {
isar->ch[i].bch.nr = i + 1;
mISDN_initbchannel(&isar->ch[i].bch, MAX_DATA_MEM);
mISDN_initbchannel(&isar->ch[i].bch, MAX_DATA_MEM, 32);
isar->ch[i].bch.ch.nr = i + 1;
isar->ch[i].bch.ch.send = &isar_l2l1;
isar->ch[i].bch.ch.ctrl = isar_bctrl;

23
drivers/isdn/hardware/mISDN/netjet.c
View File

@ -408,7 +408,7 @@ read_dma(struct tiger_ch *bc, u32 idx, int cnt)
}
if (test_bit(FLG_TRANSPARENT, &bc->bch.Flags)) {
recv_Bchannel(&bc->bch, 0);
recv_Bchannel(&bc->bch, 0, false);
return;
}
@ -426,7 +426,7 @@ read_dma(struct tiger_ch *bc, u32 idx, int cnt)
DUMP_PREFIX_OFFSET, p,
stat);
}
recv_Bchannel(&bc->bch, 0);
recv_Bchannel(&bc->bch, 0, false);
stat = bchannel_get_rxbuf(&bc->bch, bc->bch.maxlen);
if (stat < 0) {
pr_warning("%s.B%d: No memory for %d bytes\n",
@ -758,21 +758,7 @@ nj_l2l1B(struct mISDNchannel *ch, struct sk_buff *skb)
static int
channel_bctrl(struct tiger_ch *bc, struct mISDN_ctrl_req *cq)
{
int ret = 0;
struct tiger_hw *card = bc->bch.hw;
switch (cq->op) {
case MISDN_CTRL_GETOP:
cq->op = 0;
break;
/* Nothing implemented yet */
case MISDN_CTRL_FILL_EMPTY:
default:
pr_info("%s: %s unknown Op %x\n", card->name, __func__, cq->op);
ret = -EINVAL;
break;
}
return ret;
return mISDN_ctrl_bchannel(&bc->bch, cq);
}
static int
@ -1006,7 +992,8 @@ setup_instance(struct tiger_hw *card)
for (i = 0; i < 2; i++) {
card->bc[i].bch.nr = i + 1;
set_channelmap(i + 1, card->isac.dch.dev.channelmap);
mISDN_initbchannel(&card->bc[i].bch, MAX_DATA_MEM);
mISDN_initbchannel(&card->bc[i].bch, MAX_DATA_MEM,
NJ_DMA_RXSIZE >> 1);
card->bc[i].bch.hw = card;
card->bc[i].bch.ch.send = nj_l2l1B;
card->bc[i].bch.ch.ctrl = nj_bctrl;

25
drivers/isdn/hardware/mISDN/w6692.c
View File

@ -688,7 +688,7 @@ W6692B_interrupt(struct w6692_hw *card, int ch)
if (count == 0)
count = W_B_FIFO_THRESH;
W6692_empty_Bfifo(wch, count);
recv_Bchannel(&wch->bch, 0);
recv_Bchannel(&wch->bch, 0, false);
}
}
if (stat & W_B_EXI_RMR) {
@ -704,9 +704,8 @@ W6692B_interrupt(struct w6692_hw *card, int ch)
W_B_CMDR_RRST | W_B_CMDR_RACT);
} else {
W6692_empty_Bfifo(wch, W_B_FIFO_THRESH);
if (test_bit(FLG_TRANSPARENT, &wch->bch.Flags) &&
wch->bch.rx_skb && (wch->bch.rx_skb->len > 0))
recv_Bchannel(&wch->bch, 0);
if (test_bit(FLG_TRANSPARENT, &wch->bch.Flags))
recv_Bchannel(&wch->bch, 0, false);
}
}
if (stat & W_B_EXI_RDOV) {
@ -979,20 +978,7 @@ w6692_l2l1B(struct mISDNchannel *ch, struct sk_buff *skb)
static int
channel_bctrl(struct bchannel *bch, struct mISDN_ctrl_req *cq)
{
int ret = 0;
switch (cq->op) {
case MISDN_CTRL_GETOP:
cq->op = 0;
break;
/* Nothing implemented yet */
case MISDN_CTRL_FILL_EMPTY:
default:
pr_info("%s: unknown Op %x\n", __func__, cq->op);
ret = -EINVAL;
break;
}
return ret;
return mISDN_ctrl_bchannel(bch, cq);
}
static int
@ -1303,7 +1289,8 @@ setup_instance(struct w6692_hw *card)
card->dch.hw = card;
card->dch.dev.nrbchan = 2;
for (i = 0; i < 2; i++) {
mISDN_initbchannel(&card->bc[i].bch, MAX_DATA_MEM);
mISDN_initbchannel(&card->bc[i].bch, MAX_DATA_MEM,
W_B_FIFO_THRESH);
card->bc[i].bch.hw = card;
card->bc[i].bch.nr = i + 1;
card->bc[i].bch.ch.nr = i + 1;

65
drivers/isdn/mISDN/hwchannel.c
View File

@ -81,10 +81,16 @@ mISDN_initdchannel(struct dchannel *ch, int maxlen, void *phf)
EXPORT_SYMBOL(mISDN_initdchannel);
int
mISDN_initbchannel(struct bchannel *ch, int maxlen)
mISDN_initbchannel(struct bchannel *ch, unsigned short maxlen,
unsigned short minlen)
{
ch->Flags = 0;
ch->minlen = minlen;
ch->next_minlen = minlen;
ch->init_minlen = minlen;
ch->maxlen = maxlen;
ch->next_maxlen = maxlen;
ch->init_maxlen = maxlen;
ch->hw = NULL;
ch->rx_skb = NULL;
ch->tx_skb = NULL;
@ -134,6 +140,10 @@ mISDN_clear_bchannel(struct bchannel *ch)
test_and_clear_bit(FLG_TX_BUSY, &ch->Flags);
test_and_clear_bit(FLG_TX_NEXT, &ch->Flags);
test_and_clear_bit(FLG_ACTIVE, &ch->Flags);
ch->minlen = ch->init_minlen;
ch->next_minlen = ch->init_minlen;
ch->maxlen = ch->init_maxlen;
ch->next_maxlen = ch->init_maxlen;
}
EXPORT_SYMBOL(mISDN_clear_bchannel);
@ -148,6 +158,33 @@ mISDN_freebchannel(struct bchannel *ch)
}
EXPORT_SYMBOL(mISDN_freebchannel);
int
mISDN_ctrl_bchannel(struct bchannel *bch, struct mISDN_ctrl_req *cq)
{
int ret = 0;
switch (cq->op) {
case MISDN_CTRL_GETOP:
cq->op = MISDN_CTRL_RX_BUFFER;
break;
case MISDN_CTRL_RX_BUFFER:
if (cq->p2 > MISDN_CTRL_RX_SIZE_IGNORE)
bch->next_maxlen = cq->p2;
if (cq->p1 > MISDN_CTRL_RX_SIZE_IGNORE)
bch->next_minlen = cq->p1;
/* we return the old values */
cq->p1 = bch->minlen;
cq->p2 = bch->maxlen;
break;
default:
pr_info("mISDN unhandled control %x operation\n", cq->op);
ret = -EINVAL;
break;
}
return ret;
}
EXPORT_SYMBOL(mISDN_ctrl_bchannel);
static inline u_int
get_sapi_tei(u_char *p)
{
@ -197,7 +234,7 @@ recv_Echannel(struct dchannel *ech, struct dchannel *dch)
EXPORT_SYMBOL(recv_Echannel);
void
recv_Bchannel(struct bchannel *bch, unsigned int id)
recv_Bchannel(struct bchannel *bch, unsigned int id, bool force)
{
struct mISDNhead *hh;
@ -211,6 +248,9 @@ recv_Bchannel(struct bchannel *bch, unsigned int id)
dev_kfree_skb(bch->rx_skb);
bch->rx_skb = NULL;
} else {
if (test_bit(FLG_TRANSPARENT, &bch->Flags) &&
(bch->rx_skb->len < bch->minlen) && !force)
return;
hh = mISDN_HEAD_P(bch->rx_skb);
hh->prim = PH_DATA_IND;
hh->id = id;
@ -426,7 +466,7 @@ bchannel_get_rxbuf(struct bchannel *bch, int reqlen)
bch->nr, reqlen, len);
if (test_bit(FLG_TRANSPARENT, &bch->Flags)) {
/* send what we have now and try a new buffer */
recv_Bchannel(bch, 0);
recv_Bchannel(bch, 0, true);
} else {
/* on HDLC we have to drop too big frames */
return -EMSGSIZE;
@ -435,12 +475,25 @@ bchannel_get_rxbuf(struct bchannel *bch, int reqlen)
return len;
}
}
/* update current min/max length first */
if (unlikely(bch->maxlen != bch->next_maxlen))
bch->maxlen = bch->next_maxlen;
if (unlikely(bch->minlen != bch->next_minlen))
bch->minlen = bch->next_minlen;
if (unlikely(reqlen > bch->maxlen))
return -EMSGSIZE;
if (test_bit(FLG_TRANSPARENT, &bch->Flags))
len = reqlen;
else /* with HDLC we do not know the length yet */
if (test_bit(FLG_TRANSPARENT, &bch->Flags)) {
if (reqlen >= bch->minlen) {
len = reqlen;
} else {
len = 2 * bch->minlen;
if (len > bch->maxlen)
len = bch->maxlen;
}
} else {
/* with HDLC we do not know the length yet */
len = bch->maxlen;
}
bch->rx_skb = mI_alloc_skb(len, GFP_ATOMIC);
if (!bch->rx_skb) {
pr_warning("B%d receive no memory for %d bytes\n",

2
drivers/isdn/mISDN/l1oip_core.c
View File

@ -1420,7 +1420,7 @@ init_card(struct l1oip *hc, int pri, int bundle)
bch->nr = i + ch;
bch->slot = i + ch;
bch->debug = debug;
mISDN_initbchannel(bch, MAX_DATA_MEM);
mISDN_initbchannel(bch, MAX_DATA_MEM, 0);
bch->hw = hc;
bch->ch.send = handle_bmsg;
bch->ch.ctrl = l1oip_bctrl;

13
include/linux/mISDNhw.h
View File

@ -154,7 +154,12 @@ struct bchannel {
struct timer_list timer;
/* receive data */
struct sk_buff *rx_skb;
int maxlen;
unsigned short maxlen;
unsigned short init_maxlen; /* initial value */
unsigned short next_maxlen; /* pending value */
unsigned short minlen; /* for transparent data */
unsigned short init_minlen; /* initial value */
unsigned short next_minlen; /* pending value */
/* send data */
struct sk_buff *next_skb;
struct sk_buff *tx_skb;
@ -169,10 +174,12 @@ struct bchannel {
};
extern int mISDN_initdchannel(struct dchannel *, int, void *);
extern int mISDN_initbchannel(struct bchannel *, int);
extern int mISDN_initbchannel(struct bchannel *, unsigned short,
unsigned short);
extern int mISDN_freedchannel(struct dchannel *);
extern void mISDN_clear_bchannel(struct bchannel *);
extern int mISDN_freebchannel(struct bchannel *);
extern int mISDN_ctrl_bchannel(struct bchannel *, struct mISDN_ctrl_req *);
extern void queue_ch_frame(struct mISDNchannel *, u_int,
int, struct sk_buff *);
extern int dchannel_senddata(struct dchannel *, struct sk_buff *);
@ -180,7 +187,7 @@ extern int bchannel_senddata(struct bchannel *, struct sk_buff *);
extern int bchannel_get_rxbuf(struct bchannel *, int);
extern void recv_Dchannel(struct dchannel *);
extern void recv_Echannel(struct dchannel *, struct dchannel *);
extern void recv_Bchannel(struct bchannel *, unsigned int id);
extern void recv_Bchannel(struct bchannel *, unsigned int, bool);
extern void recv_Dchannel_skb(struct dchannel *, struct sk_buff *);
extern void recv_Bchannel_skb(struct bchannel *, struct sk_buff *);
extern int get_next_bframe(struct bchannel *);

9
include/linux/mISDNif.h
View File

@ -37,7 +37,7 @@
*/
#define MISDN_MAJOR_VERSION 1
#define MISDN_MINOR_VERSION 1
#define MISDN_RELEASE 28
#define MISDN_RELEASE 29
/* primitives for information exchange
* generell format
@ -365,6 +365,7 @@ clear_channelmap(u_int nr, u_char *map)
#define MISDN_CTRL_LOOP 0x0001
#define MISDN_CTRL_CONNECT 0x0002
#define MISDN_CTRL_DISCONNECT 0x0004
#define MISDN_CTRL_RX_BUFFER 0x0008
#define MISDN_CTRL_PCMCONNECT 0x0010
#define MISDN_CTRL_PCMDISCONNECT 0x0020
#define MISDN_CTRL_SETPEER 0x0040
@ -387,6 +388,12 @@ clear_channelmap(u_int nr, u_char *map)
#define MISDN_CTRL_HFC_WD_INIT 0x4009
#define MISDN_CTRL_HFC_WD_RESET 0x400A
/* special RX buffer value for MISDN_CTRL_RX_BUFFER request.p1 is the minimum
* buffer size request.p2 the maximum. Using MISDN_CTRL_RX_SIZE_IGNORE will
* not change the value, but still read back the actual stetting.
*/
#define MISDN_CTRL_RX_SIZE_IGNORE -1
/* socket options */
#define MISDN_TIME_STAMP 0x0001