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).
322 lines
7.5 KiB
C
322 lines
7.5 KiB
C
/*
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*
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* ===================================
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* HARP | Host ATM Research Platform
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* ===================================
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*
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*
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* This Host ATM Research Platform ("HARP") file (the "Software") is
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* made available by Network Computing Services, Inc. ("NetworkCS")
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* "AS IS". NetworkCS does not provide maintenance, improvements or
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* support of any kind.
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*
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* NETWORKCS MAKES NO WARRANTIES OR REPRESENTATIONS, EXPRESS OR IMPLIED,
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* INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS FOR A PARTICULAR PURPOSE, AS TO ANY ELEMENT OF THE
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* SOFTWARE OR ANY SUPPORT PROVIDED IN CONNECTION WITH THIS SOFTWARE.
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* In no event shall NetworkCS be responsible for any damages, including
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* but not limited to consequential damages, arising from or relating to
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* any use of the Software or related support.
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*
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* Copyright 1994-1998 Network Computing Services, Inc.
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*
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* Copies of this Software may be made, however, the above copyright
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* notice must be reproduced on all copies.
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*
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* @(#) $Id: fore_vcm.c,v 1.7 1998/06/29 21:42:20 mks Exp $
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*
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*/
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/*
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* FORE Systems 200-Series Adapter Support
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* ---------------------------------------
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*
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* Virtual Channel Management
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*
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*/
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#ifndef lint
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static char *RCSid = "@(#) $Id: fore_vcm.c,v 1.7 1998/06/29 21:42:20 mks Exp $";
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#endif
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#include <dev/hfa/fore_include.h>
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/*
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* VCC Stack Instantiation
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*
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* This function is called via the common driver code during a device VCC
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* stack instantiation. The common code has already validated some of
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* the request so we just need to check a few more Fore-specific details.
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*
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* Called at splnet.
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*
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* Arguments:
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* cup pointer to device common unit
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* cvp pointer to common VCC entry
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*
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* Returns:
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* 0 instantiation successful
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* err instantiation failed - reason indicated
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*
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*/
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int
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fore_instvcc(cup, cvp)
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Cmn_unit *cup;
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Cmn_vcc *cvp;
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{
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Fore_vcc *fvp = (Fore_vcc *)cvp;
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Atm_attributes *ap = &fvp->fv_connvc->cvc_attr;
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/*
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* Validate requested AAL
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*/
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switch (ap->aal.type) {
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case ATM_AAL0:
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fvp->fv_aal = FORE_AAL_0;
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break;
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case ATM_AAL3_4:
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fvp->fv_aal = FORE_AAL_4;
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if ((ap->aal.v.aal4.forward_max_SDU_size > FORE_IFF_MTU) ||
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(ap->aal.v.aal4.backward_max_SDU_size > FORE_IFF_MTU))
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return (EINVAL);
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break;
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case ATM_AAL5:
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fvp->fv_aal = FORE_AAL_5;
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if ((ap->aal.v.aal5.forward_max_SDU_size > FORE_IFF_MTU) ||
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(ap->aal.v.aal5.backward_max_SDU_size > FORE_IFF_MTU))
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return (EINVAL);
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break;
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default:
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return (EINVAL);
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}
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return (0);
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}
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/*
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* Open a VCC
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*
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* This function is called via the common driver code after receiving a
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* stack *_INIT command. The common code has already validated most of
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* the request so we just need to check a few more Fore-specific details.
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* Then we just issue the command to the CP. Note that we can't wait around
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* for the CP to process the command, so we return success for now and abort
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* the connection if the command later fails.
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*
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* Called at splimp.
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*
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* Arguments:
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* cup pointer to device common unit
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* cvp pointer to common VCC entry
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*
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* Returns:
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* 0 open successful
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* else open failed
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*
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*/
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int
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fore_openvcc(cup, cvp)
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Cmn_unit *cup;
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Cmn_vcc *cvp;
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{
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Fore_unit *fup = (Fore_unit *)cup;
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Fore_vcc *fvp = (Fore_vcc *)cvp;
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H_cmd_queue *hcp;
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Cmd_queue *cqp;
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struct vccb *vcp;
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vcp = fvp->fv_connvc->cvc_vcc;
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ATM_DEBUG4("fore_openvcc: fup=0x%x, fvp=0x%x, vcc=(%d,%d)\n",
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(int)fup, (int)fvp, vcp->vc_vpi, vcp->vc_vci);
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/*
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* Validate the VPI and VCI values
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*/
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if ((vcp->vc_vpi > fup->fu_pif.pif_maxvpi) ||
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(vcp->vc_vci > fup->fu_pif.pif_maxvci)) {
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return (1);
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}
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/*
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* Only need to tell the CP about incoming VCCs
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*/
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if ((vcp->vc_type & VCC_IN) == 0) {
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DEVICE_LOCK((Cmn_unit *)fup);
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fup->fu_open_vcc++;
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fvp->fv_state = CVS_ACTIVE;
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DEVICE_UNLOCK((Cmn_unit *)fup);
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return (0);
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}
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/*
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* Queue command at end of command queue
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*/
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hcp = fup->fu_cmd_tail;
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if ((*hcp->hcq_status) & QSTAT_FREE) {
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/*
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* Queue entry available, so set our view of things up
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*/
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hcp->hcq_code = CMD_ACT_VCCIN;
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hcp->hcq_arg = fvp;
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fup->fu_cmd_tail = hcp->hcq_next;
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fvp->fv_flags |= FVF_ACTCMD;
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/*
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* Now set the CP-resident queue entry - the CP will grab
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* the command when the op-code is set.
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*/
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cqp = hcp->hcq_cpelem;
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(*hcp->hcq_status) = QSTAT_PENDING;
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cqp->cmdq_act.act_vccid = CP_WRITE(vcp->vc_vci);
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if (fvp->fv_aal == FORE_AAL_0)
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cqp->cmdq_act.act_batch = CP_WRITE(1);
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cqp->cmdq_act.act_spec = CP_WRITE(
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ACT_SET_SPEC(BUF_STRAT_1, fvp->fv_aal,
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CMD_ACT_VCCIN | CMD_INTR_REQ));
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} else {
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/*
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* Command queue full
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*/
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fup->fu_stats->st_drv.drv_cm_full++;
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return (1);
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}
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return (0);
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}
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/*
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* Close a VCC
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*
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* This function is called via the common driver code after receiving a
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* stack *_TERM command. The common code has already validated most of
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* the request so we just need to check a few more Fore-specific details.
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* Then we just issue the command to the CP. Note that we can't wait around
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* for the CP to process the command, so we return success for now and whine
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* if the command later fails.
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*
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* Called at splimp.
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*
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* Arguments:
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* cup pointer to device common unit
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* cvp pointer to common VCC entry
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*
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* Returns:
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* 0 close successful
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* else close failed
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*
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*/
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int
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fore_closevcc(cup, cvp)
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Cmn_unit *cup;
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Cmn_vcc *cvp;
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{
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Fore_unit *fup = (Fore_unit *)cup;
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Fore_vcc *fvp = (Fore_vcc *)cvp;
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H_xmit_queue *hxp;
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H_cmd_queue *hcp;
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Cmd_queue *cqp;
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struct vccb *vcp;
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int i, err = 0;
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vcp = fvp->fv_connvc->cvc_vcc;
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ATM_DEBUG4("fore_closevcc: fup=0x%x, fvp=0x%x, vcc=(%d,%d)\n",
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(int)fup, (int)fvp, vcp->vc_vpi, vcp->vc_vci);
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DEVICE_LOCK((Cmn_unit *)fup);
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/*
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* Clear any references to this VCC in our transmit queue
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*/
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for (hxp = fup->fu_xmit_head, i = 0;
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(*hxp->hxq_status != QSTAT_FREE) && (i < XMIT_QUELEN);
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hxp = hxp->hxq_next, i++) {
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if (hxp->hxq_vcc == fvp) {
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hxp->hxq_vcc = NULL;
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}
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}
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/*
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* Clear any references to this VCC in our command queue
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*/
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for (hcp = fup->fu_cmd_head, i = 0;
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(*hcp->hcq_status != QSTAT_FREE) && (i < CMD_QUELEN);
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hcp = hcp->hcq_next, i++) {
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switch (hcp->hcq_code) {
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case CMD_ACT_VCCIN:
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case CMD_ACT_VCCOUT:
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if (hcp->hcq_arg == fvp) {
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hcp->hcq_arg = NULL;
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}
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break;
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}
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}
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/*
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* If this VCC has been previously activated, then we need to tell
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* the CP to deactivate it.
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*/
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if (fvp->fv_flags & FVF_ACTCMD) {
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/*
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* Queue command at end of command queue
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*/
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hcp = fup->fu_cmd_tail;
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if ((*hcp->hcq_status) & QSTAT_FREE) {
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/*
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* Queue entry available, so set our view of things up
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*/
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hcp->hcq_code = CMD_DACT_VCCIN;
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hcp->hcq_arg = fvp;
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fup->fu_cmd_tail = hcp->hcq_next;
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/*
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* Now set the CP-resident queue entry - the CP will
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* grab the command when the op-code is set.
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*/
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cqp = hcp->hcq_cpelem;
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(*hcp->hcq_status) = QSTAT_PENDING;
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cqp->cmdq_dact.dact_vccid = CP_WRITE(vcp->vc_vci);
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cqp->cmdq_dact.dact_cmd =
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CP_WRITE(CMD_DACT_VCCIN|CMD_INTR_REQ);
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} else {
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/*
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* Command queue full
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*
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* If we get here, we'll be getting out-of-sync with
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* the CP because we can't (for now at least) do
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* anything about close errors in the common code.
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* This won't be too bad, since we'll just toss any
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* PDUs received from the VCC and the sigmgr's will
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* always get open failures when trying to use this
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* (vpi,vci)...oh, well...always gotta have that one
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* last bug to fix! XXX
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*/
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fup->fu_stats->st_drv.drv_cm_full++;
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err = 1;
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}
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}
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/*
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* Finish up...
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*/
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if (fvp->fv_state == CVS_ACTIVE)
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fup->fu_open_vcc--;
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DEVICE_UNLOCK((Cmn_unit *)fup);
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return (err);
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}
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