3 * ===================================
4 * HARP | Host ATM Research Platform
5 * ===================================
8 * This Host ATM Research Platform ("HARP") file (the "Software") is
9 * made available by Network Computing Services, Inc. ("NetworkCS")
10 * "AS IS". NetworkCS does not provide maintenance, improvements or
11 * support of any kind.
13 * NETWORKCS MAKES NO WARRANTIES OR REPRESENTATIONS, EXPRESS OR IMPLIED,
14 * INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY
15 * AND FITNESS FOR A PARTICULAR PURPOSE, AS TO ANY ELEMENT OF THE
16 * SOFTWARE OR ANY SUPPORT PROVIDED IN CONNECTION WITH THIS SOFTWARE.
17 * In no event shall NetworkCS be responsible for any damages, including
18 * but not limited to consequential damages, arising from or relating to
19 * any use of the Software or related support.
21 * Copyright 1994-1998 Network Computing Services, Inc.
23 * Copies of this Software may be made, however, the above copyright
24 * notice must be reproduced on all copies.
26 * @(#) $FreeBSD: src/sys/dev/hea/eni_vcm.c,v 1.3 1999/08/28 00:41:47 peter Exp $
27 * @(#) $DragonFly: src/sys/dev/atm/hea/eni_vcm.c,v 1.4 2003/08/07 21:16:49 dillon Exp $
31 * Efficient ENI Adapter Support
32 * -----------------------------
34 * Virtual Channel Managment
39 #include <netatm/kern_include.h>
41 #include "eni_stats.h"
46 * VCC Stack Instantiation
48 * This function is called via the common driver code during a device VCC
49 * stack instantiation. The common code has already validated some of
50 * the request so we just need to check a few more ENI-specific details.
55 * cup pointer to device common unit
56 * cvp pointer to common VCC entry
59 * 0 instantiation successful
60 * err instantiation failed - reason indicated
68 Eni_unit *eup = (Eni_unit *)cup;
69 Eni_vcc *evp = (Eni_vcc *)cvp;
70 Atm_attributes *ap = &evp->ev_connvc->cvc_attr;
73 * Validate requested AAL
75 switch (ap->aal.type) {
81 if ((ap->aal.v.aal5.forward_max_SDU_size > ENI_IFF_MTU) ||
82 (ap->aal.v.aal5.backward_max_SDU_size > ENI_IFF_MTU)) {
83 eup->eu_stats.eni_st_drv.drv_vc_maxpdu++;
99 * This function is called via the common driver code after receiving a
100 * stack *_INIT* command. The common code has already validated most of
101 * the request so we just need to check a few more ENI-specific details.
106 * cup pointer to device common unit
107 * cvp pointer to common VCC entry
115 eni_openvcc ( cup, cvp )
119 Eni_unit *eup = (Eni_unit *)cup;
120 Eni_vcc *evp = (Eni_vcc *)cvp;
121 struct vccb *vcp = evp->ev_connvc->cvc_vcc;
130 * Validate the VPI and VCI values
132 if ( (vcp->vc_vpi > eup->eu_pif.pif_maxvpi) ||
133 (vcp->vc_vci > eup->eu_pif.pif_maxvci) ) {
134 eup->eu_stats.eni_st_drv.drv_vc_badrng++;
139 * Check if this VCI is already active
141 vct = &eup->eu_vcitbl[ vcp->vc_vci ];
142 if ( vct->vci_control >> VCI_MODE_SHIFT != VCI_MODE_TRASH ) {
147 * Allocate some permanent adapter memory for the reassembly
148 * buffer. Special case the signalling channel(s) buffer size.
149 * Otherwise, the buffer size will be based on whether this is
150 * a server or client card.
152 if ( vcp->vc_vci == UNI_SIG_VCI ) /* HACK */
155 size = (eup->eu_ramsize > MAX_CLIENT_RAM * ENI_BUF_PGSZ) ?
156 RX_SERVER_BSIZE * ENI_BUF_PGSZ :
157 RX_CLIENT_BSIZE * ENI_BUF_PGSZ;
159 if ( ( evp->ev_rxbuf = eni_allocate_buffer ( eup, (u_long *)&size ) )
166 * We only need to open incoming VCI's so outbound VCI's
167 * just get set to CVS_ACTIVE state.
169 if ( ( vcp->vc_type & VCC_IN ) == 0 ) {
171 * Set the state and return - nothing else needs to be done.
173 evp->ev_state = CVS_ACTIVE;
178 * Set the VCI Table entry to start receiving
180 mode = ( evp->ev_connvc->cvc_attr.aal.type == ATM_AAL5
181 ? VCI_MODE_AAL5 : VCI_MODE_AAL0 );
182 size >>= ENI_LOC_PREDIV; /* Predivide by 256 WORDS */
183 for ( nsize = -1; size; nsize++ )
186 vct->vci_control = mode << VCI_MODE_SHIFT |
187 PTI_MODE_TRASH << VCI_PTI_SHIFT |
188 ( (u_int)(evp->ev_rxbuf) >> ENI_LOC_PREDIV ) << VCI_LOC_SHIFT |
189 nsize << VCI_SIZE_SHIFT;
190 vct->vci_descr = 0; /* Descr = Rdptr = 0 */
191 vct->vci_write = 0; /* WritePtr = CellCount = 0 */
196 evp->ev_state = CVS_ACTIVE;
204 * This function is called via the common driver code after receiving a
205 * stack *_TERM* command. The common code has already validated most of
206 * the request so we just need to check a few more ENI-specific details.
211 * cup pointer to device common unit
212 * cvp pointer to common VCC entry
220 eni_closevcc ( cup, cvp )
224 Eni_unit *eup = (Eni_unit *)cup;
225 Eni_vcc *evp = (Eni_vcc *)cvp;
226 struct vccb *vcp = evp->ev_connvc->cvc_vcc;
232 * Clear any references to this VCC in our transmit queue
235 * We'll simply allow any existing TX requests to be
236 * sent as that's easier then pulling them out of
237 * everywhere. Besides, they should be ignored at the
238 * receiver whenever the other end shuts down.
242 * Free the adapter receive buffer
244 (void) eni_free_buffer ( eup, (caddr_t)evp->ev_rxbuf );
247 * If this is an outbound only VCI, then we can close
250 if ( ( vcp->vc_type & VCC_IN ) == 0 ) {
252 * The state will be set to TERM when we return
253 * to the *_TERM caller.
259 * Find VCI entry in VCI Table
261 vct = &eup->eu_vcitbl[ vcp->vc_vci ];
264 * Reset the VCI state
266 vct->vci_control = ( vct->vci_control & VCI_MODE_MASK )
267 /* | VCI_MODE_TRASH */;
268 DELAY ( MIDWAY_DELAY ); /* Give the adapter time to */
269 /* make the transition */
274 KM_ZERO ( vct, sizeof(VCI_Table) );