1820df7a2d
Host ATM Research Platform (HARP), Network Computing Services, Inc. This software was developed with the support of the Defense Advanced Research Projects Agency (DARPA).
284 lines
6.4 KiB
C
284 lines
6.4 KiB
C
/*
|
|
*
|
|
* ===================================
|
|
* 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: eni_vcm.c,v 1.8 1998/06/29 23:03:18 mks Exp $
|
|
*
|
|
*/
|
|
|
|
/*
|
|
* Efficient ENI Adapter Support
|
|
* -----------------------------
|
|
*
|
|
* Virtual Channel Managment
|
|
*
|
|
*/
|
|
|
|
|
|
#ifndef lint
|
|
static char *RCSid = "@(#) $Id: eni_vcm.c,v 1.8 1998/06/29 23:03:18 mks Exp $";
|
|
#endif
|
|
|
|
#include <netatm/kern_include.h>
|
|
|
|
#include <dev/hea/eni_stats.h>
|
|
#include <dev/hea/eni.h>
|
|
#include <dev/hea/eni_var.h>
|
|
|
|
|
|
/*
|
|
* 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 ENI-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
|
|
eni_instvcc(cup, cvp)
|
|
Cmn_unit *cup;
|
|
Cmn_vcc *cvp;
|
|
{
|
|
Eni_unit *eup = (Eni_unit *)cup;
|
|
Eni_vcc *evp = (Eni_vcc *)cvp;
|
|
Atm_attributes *ap = &evp->ev_connvc->cvc_attr;
|
|
|
|
/*
|
|
* Validate requested AAL
|
|
*/
|
|
switch (ap->aal.type) {
|
|
|
|
case ATM_AAL0:
|
|
break;
|
|
|
|
case ATM_AAL5:
|
|
if ((ap->aal.v.aal5.forward_max_SDU_size > ENI_IFF_MTU) ||
|
|
(ap->aal.v.aal5.backward_max_SDU_size > ENI_IFF_MTU)) {
|
|
eup->eu_stats.eni_st_drv.drv_vc_maxpdu++;
|
|
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 ENI-specific details.
|
|
*
|
|
* Called at splimp.
|
|
*
|
|
* Arguments:
|
|
* cup pointer to device common unit
|
|
* cvp pointer to common VCC entry
|
|
*
|
|
* Returns:
|
|
* 0 open sucessful
|
|
* err open failed
|
|
*
|
|
*/
|
|
int
|
|
eni_openvcc ( cup, cvp )
|
|
Cmn_unit *cup;
|
|
Cmn_vcc *cvp;
|
|
{
|
|
Eni_unit *eup = (Eni_unit *)cup;
|
|
Eni_vcc *evp = (Eni_vcc *)cvp;
|
|
struct vccb *vcp = evp->ev_connvc->cvc_vcc;
|
|
int err = 0;
|
|
|
|
VCI_Table *vct;
|
|
int size;
|
|
int mode;
|
|
int nsize;
|
|
|
|
/*
|
|
* Validate the VPI and VCI values
|
|
*/
|
|
if ( (vcp->vc_vpi > eup->eu_pif.pif_maxvpi) ||
|
|
(vcp->vc_vci > eup->eu_pif.pif_maxvci) ) {
|
|
eup->eu_stats.eni_st_drv.drv_vc_badrng++;
|
|
return ( EFAULT );
|
|
}
|
|
|
|
/*
|
|
* Check if this VCI is already active
|
|
*/
|
|
vct = &eup->eu_vcitbl[ vcp->vc_vci ];
|
|
if ( vct->vci_control >> VCI_MODE_SHIFT != VCI_MODE_TRASH ) {
|
|
return ( EEXIST );
|
|
}
|
|
|
|
/*
|
|
* Allocate some permanent adapter memory for the reassembly
|
|
* buffer. Special case the signalling channel(s) buffer size.
|
|
* Otherwise, the buffer size will be based on whether this is
|
|
* a server or client card.
|
|
*/
|
|
if ( vcp->vc_vci == UNI_SIG_VCI ) /* HACK */
|
|
size = RX_SIG_BSIZE;
|
|
else
|
|
size = (eup->eu_ramsize > MAX_CLIENT_RAM * ENI_BUF_PGSZ) ?
|
|
RX_SERVER_BSIZE * ENI_BUF_PGSZ :
|
|
RX_CLIENT_BSIZE * ENI_BUF_PGSZ;
|
|
|
|
if ( ( evp->ev_rxbuf = eni_allocate_buffer ( eup, (u_long *)&size ) )
|
|
== (caddr_t)NULL ) {
|
|
return ( ENOMEM );
|
|
}
|
|
evp->ev_rxpos = 0;
|
|
|
|
/*
|
|
* We only need to open incoming VCI's so outbound VCI's
|
|
* just get set to CVS_ACTIVE state.
|
|
*/
|
|
if ( ( vcp->vc_type & VCC_IN ) == 0 ) {
|
|
/*
|
|
* Set the state and return - nothing else needs to be done.
|
|
*/
|
|
evp->ev_state = CVS_ACTIVE;
|
|
return ( 0 );
|
|
}
|
|
|
|
/*
|
|
* Set the VCI Table entry to start receiving
|
|
*/
|
|
mode = ( evp->ev_connvc->cvc_attr.aal.type == ATM_AAL5
|
|
? VCI_MODE_AAL5 : VCI_MODE_AAL0 );
|
|
size >>= ENI_LOC_PREDIV; /* Predivide by 256 WORDS */
|
|
for ( nsize = -1; size; nsize++ )
|
|
size >>= 1;
|
|
|
|
vct->vci_control = mode << VCI_MODE_SHIFT |
|
|
PTI_MODE_TRASH << VCI_PTI_SHIFT |
|
|
( (u_int)(evp->ev_rxbuf) >> ENI_LOC_PREDIV ) << VCI_LOC_SHIFT |
|
|
nsize << VCI_SIZE_SHIFT;
|
|
vct->vci_descr = 0; /* Descr = Rdptr = 0 */
|
|
vct->vci_write = 0; /* WritePtr = CellCount = 0 */
|
|
|
|
/*
|
|
* Indicate VC active
|
|
*/
|
|
evp->ev_state = CVS_ACTIVE;
|
|
|
|
return ( err );
|
|
}
|
|
|
|
/*
|
|
* 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 ENI-specific details.
|
|
*
|
|
* Called at splimp.
|
|
*
|
|
* Arguments:
|
|
* cup pointer to device common unit
|
|
* cvp pointer to common VCC entry
|
|
*
|
|
* Returns:
|
|
* 0 close sucessful
|
|
* err close failed
|
|
*
|
|
*/
|
|
int
|
|
eni_closevcc ( cup, cvp )
|
|
Cmn_unit *cup;
|
|
Cmn_vcc *cvp;
|
|
{
|
|
Eni_unit *eup = (Eni_unit *)cup;
|
|
Eni_vcc *evp = (Eni_vcc *)cvp;
|
|
struct vccb *vcp = evp->ev_connvc->cvc_vcc;
|
|
int err = 0;
|
|
|
|
VCI_Table *vct;
|
|
|
|
/*
|
|
* Clear any references to this VCC in our transmit queue
|
|
*/
|
|
/*
|
|
* We'll simply allow any existing TX requests to be
|
|
* sent as that's easier then pulling them out of
|
|
* everywhere. Besides, they should be ignored at the
|
|
* receiver whenever the other end shuts down.
|
|
*/
|
|
|
|
/*
|
|
* Free the adapter receive buffer
|
|
*/
|
|
(void) eni_free_buffer ( eup, (caddr_t)evp->ev_rxbuf );
|
|
|
|
/*
|
|
* If this is an outbound only VCI, then we can close
|
|
* immediately.
|
|
*/
|
|
if ( ( vcp->vc_type & VCC_IN ) == 0 ) {
|
|
/*
|
|
* The state will be set to TERM when we return
|
|
* to the *_TERM caller.
|
|
*/
|
|
return ( 0 );
|
|
}
|
|
|
|
/*
|
|
* Find VCI entry in VCI Table
|
|
*/
|
|
vct = &eup->eu_vcitbl[ vcp->vc_vci ];
|
|
|
|
/*
|
|
* Reset the VCI state
|
|
*/
|
|
vct->vci_control = ( vct->vci_control & VCI_MODE_MASK )
|
|
/* | VCI_MODE_TRASH */;
|
|
DELAY ( MIDWAY_DELAY ); /* Give the adapter time to */
|
|
/* make the transition */
|
|
|
|
/*
|
|
* Reset everything
|
|
*/
|
|
KM_ZERO ( (caddr_t)vct, sizeof(VCI_Table) );
|
|
|
|
return ( err );
|
|
}
|
|
|