/*
*
* ===================================
* HARP | Host ATM Research Platform
* ===================================
*
*
* This Host ATM Research Platform ("HARP") file (the "Software") is
* made available by Network Computing Services, Inc. ("NetworkCS")
* "AS IS". NetworkCS does not provide maintenance, improvements or
* support of any kind.
*
* NETWORKCS MAKES NO WARRANTIES OR REPRESENTATIONS, EXPRESS OR IMPLIED,
* INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS FOR A PARTICULAR PURPOSE, AS TO ANY ELEMENT OF THE
* SOFTWARE OR ANY SUPPORT PROVIDED IN CONNECTION WITH THIS SOFTWARE.
* In no event shall NetworkCS be responsible for any damages, including
* but not limited to consequential damages, arising from or relating to
* any use of the Software or related support.
*
* Copyright 1994-1998 Network Computing Services, Inc.
*
* Copies of this Software may be made, however, the above copyright
* notice must be reproduced on all copies.
*
* @(#) $Id: fore_vcm.c,v 1.2 1998/09/17 09:34:59 phk Exp $
*
*/
/*
* FORE Systems 200-Series Adapter Support
* ---------------------------------------
*
* Virtual Channel Management
*
*/
#include <dev/hfa/fore_include.h>
#ifndef lint
__RCSID("@(#) $Id: fore_vcm.c,v 1.2 1998/09/17 09:34:59 phk Exp $");
#endif
/*
* VCC Stack Instantiation
*
* This function is called via the common driver code during a device VCC
* stack instantiation. The common code has already validated some of
* the request so we just need to check a few more Fore-specific details.
*
* Called at splnet.
*
* Arguments:
* cup pointer to device common unit
* cvp pointer to common VCC entry
*
* Returns:
* 0 instantiation successful
* err instantiation failed - reason indicated
*
*/
int
fore_instvcc(cup, cvp)
Cmn_unit *cup;
Cmn_vcc *cvp;
{
Fore_vcc *fvp = (Fore_vcc *)cvp;
Atm_attributes *ap = &fvp->fv_connvc->cvc_attr;
/*
* Validate requested AAL
*/
switch (ap->aal.type) {
case ATM_AAL0:
fvp->fv_aal = FORE_AAL_0;
break;
case ATM_AAL3_4:
fvp->fv_aal = FORE_AAL_4;
if ((ap->aal.v.aal4.forward_max_SDU_size > FORE_IFF_MTU) ||
(ap->aal.v.aal4.backward_max_SDU_size > FORE_IFF_MTU))
return (EINVAL);
break;
case ATM_AAL5:
fvp->fv_aal = FORE_AAL_5;
if ((ap->aal.v.aal5.forward_max_SDU_size > FORE_IFF_MTU) ||
(ap->aal.v.aal5.backward_max_SDU_size > FORE_IFF_MTU))
return (EINVAL);
break;
default:
return (EINVAL);
}
return (0);
}
/*
* Open a VCC
*
* This function is called via the common driver code after receiving a
* stack *_INIT command. The common code has already validated most of
* the request so we just need to check a few more Fore-specific details.
* Then we just issue the command to the CP. Note that we can't wait around
* for the CP to process the command, so we return success for now and abort
* the connection if the command later fails.
*
* Called at splimp.
*
* Arguments:
* cup pointer to device common unit
* cvp pointer to common VCC entry
*
* Returns:
* 0 open successful
* else open failed
*
*/
int
fore_openvcc(cup, cvp)
Cmn_unit *cup;
Cmn_vcc *cvp;
{
Fore_unit *fup = (Fore_unit *)cup;
Fore_vcc *fvp = (Fore_vcc *)cvp;
H_cmd_queue *hcp;
Cmd_queue *cqp;
struct vccb *vcp;
vcp = fvp->fv_connvc->cvc_vcc;
ATM_DEBUG4("fore_openvcc: fup=%p, fvp=%p, vcc=(%d,%d)\n",
fup, fvp, vcp->vc_vpi, vcp->vc_vci);
/*
* Validate the VPI and VCI values
*/
if ((vcp->vc_vpi > fup->fu_pif.pif_maxvpi) ||
(vcp->vc_vci > fup->fu_pif.pif_maxvci)) {
return (1);
}
/*
* Only need to tell the CP about incoming VCCs
*/
if ((vcp->vc_type & VCC_IN) == 0) {
DEVICE_LOCK((Cmn_unit *)fup);
fup->fu_open_vcc++;
fvp->fv_state = CVS_ACTIVE;
DEVICE_UNLOCK((Cmn_unit *)fup);
return (0);
}
/*
* Queue command at end of command queue
*/
hcp = fup->fu_cmd_tail;
if ((*hcp->hcq_status) & QSTAT_FREE) {
/*
* Queue entry available, so set our view of things up
*/
hcp->hcq_code = CMD_ACT_VCCIN;
hcp->hcq_arg = fvp;
fup->fu_cmd_tail = hcp->hcq_next;
fvp->fv_flags |= FVF_ACTCMD;
/*
* Now set the CP-resident queue entry - the CP will grab
* the command when the op-code is set.
*/
cqp = hcp->hcq_cpelem;
(*hcp->hcq_status) = QSTAT_PENDING;
cqp->cmdq_act.act_vccid = CP_WRITE(vcp->vc_vci);
if (fvp->fv_aal == FORE_AAL_0)
cqp->cmdq_act.act_batch = CP_WRITE(1);
cqp->cmdq_act.act_spec = CP_WRITE(
ACT_SET_SPEC(BUF_STRAT_1, fvp->fv_aal,
CMD_ACT_VCCIN | CMD_INTR_REQ));
} else {
/*
* Command queue full
*/
fup->fu_stats->st_drv.drv_cm_full++;
return (1);
}
return (0);
}
/*
* Close a VCC
*
* This function is called via the common driver code after receiving a
* stack *_TERM command. The common code has already validated most of
* the request so we just need to check a few more Fore-specific details.
* Then we just issue the command to the CP. Note that we can't wait around
* for the CP to process the command, so we return success for now and whine
* if the command later fails.
*
* Called at splimp.
*
* Arguments:
* cup pointer to device common unit
* cvp pointer to common VCC entry
*
* Returns:
* 0 close successful
* else close failed
*
*/
int
fore_closevcc(cup, cvp)
Cmn_unit *cup;
Cmn_vcc *cvp;
{
Fore_unit *fup = (Fore_unit *)cup;
Fore_vcc *fvp = (Fore_vcc *)cvp;
H_xmit_queue *hxp;
H_cmd_queue *hcp;
Cmd_queue *cqp;
struct vccb *vcp;
int i, err = 0;
vcp = fvp->fv_connvc->cvc_vcc;
ATM_DEBUG4("fore_closevcc: fup=%p, fvp=%p, vcc=(%d,%d)\n",
fup, fvp, vcp->vc_vpi, vcp->vc_vci);
DEVICE_LOCK((Cmn_unit *)fup);
/*
* Clear any references to this VCC in our transmit queue
*/
for (hxp = fup->fu_xmit_head, i = 0;
(*hxp->hxq_status != QSTAT_FREE) && (i < XMIT_QUELEN);
hxp = hxp->hxq_next, i++) {
if (hxp->hxq_vcc == fvp) {
hxp->hxq_vcc = NULL;
}
}
/*
* Clear any references to this VCC in our command queue
*/
for (hcp = fup->fu_cmd_head, i = 0;
(*hcp->hcq_status != QSTAT_FREE) && (i < CMD_QUELEN);
hcp = hcp->hcq_next, i++) {
switch (hcp->hcq_code) {
case CMD_ACT_VCCIN:
case CMD_ACT_VCCOUT:
if (hcp->hcq_arg == fvp) {
hcp->hcq_arg = NULL;
}
break;
}
}
/*
* If this VCC has been previously activated, then we need to tell
* the CP to deactivate it.
*/
if (fvp->fv_flags & FVF_ACTCMD) {
/*
* Queue command at end of command queue
*/
hcp = fup->fu_cmd_tail;
if ((*hcp->hcq_status) & QSTAT_FREE) {
/*
* Queue entry available, so set our view of things up
*/
hcp->hcq_code = CMD_DACT_VCCIN;
hcp->hcq_arg = fvp;
fup->fu_cmd_tail = hcp->hcq_next;
/*
* Now set the CP-resident queue entry - the CP will
* grab the command when the op-code is set.
*/
cqp = hcp->hcq_cpelem;
(*hcp->hcq_status) = QSTAT_PENDING;
cqp->cmdq_dact.dact_vccid = CP_WRITE(vcp->vc_vci);
cqp->cmdq_dact.dact_cmd =
CP_WRITE(CMD_DACT_VCCIN|CMD_INTR_REQ);
} else {
/*
* Command queue full
*
* If we get here, we'll be getting out-of-sync with
* the CP because we can't (for now at least) do
* anything about close errors in the common code.
* This won't be too bad, since we'll just toss any
* PDUs received from the VCC and the sigmgr's will
* always get open failures when trying to use this
* (vpi,vci)...oh, well...always gotta have that one
* last bug to fix! XXX
*/
fup->fu_stats->st_drv.drv_cm_full++;
err = 1;
}
}
/*
* Finish up...
*/
if (fvp->fv_state == CVS_ACTIVE)
fup->fu_open_vcc--;
DEVICE_UNLOCK((Cmn_unit *)fup);
return (err);
}
