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 $
31 * Efficient ENI Adapter Support
32 * -----------------------------
34 * Virtual Channel Managment
39 #include <netatm/kern_include.h>
41 #include <dev/hea/eni_stats.h>
42 #include <dev/hea/eni.h>
43 #include <dev/hea/eni_var.h>
46 __RCSID("@(#) $FreeBSD: src/sys/dev/hea/eni_vcm.c,v 1.3 1999/08/28 00:41:47 peter Exp $");
51 * VCC Stack Instantiation
53 * This function is called via the common driver code during a device VCC
54 * stack instantiation. The common code has already validated some of
55 * the request so we just need to check a few more ENI-specific details.
60 * cup pointer to device common unit
61 * cvp pointer to common VCC entry
64 * 0 instantiation successful
65 * err instantiation failed - reason indicated
73 Eni_unit *eup = (Eni_unit *)cup;
74 Eni_vcc *evp = (Eni_vcc *)cvp;
75 Atm_attributes *ap = &evp->ev_connvc->cvc_attr;
78 * Validate requested AAL
80 switch (ap->aal.type) {
86 if ((ap->aal.v.aal5.forward_max_SDU_size > ENI_IFF_MTU) ||
87 (ap->aal.v.aal5.backward_max_SDU_size > ENI_IFF_MTU)) {
88 eup->eu_stats.eni_st_drv.drv_vc_maxpdu++;
104 * This function is called via the common driver code after receiving a
105 * stack *_INIT* command. The common code has already validated most of
106 * the request so we just need to check a few more ENI-specific details.
111 * cup pointer to device common unit
112 * cvp pointer to common VCC entry
120 eni_openvcc ( cup, cvp )
124 Eni_unit *eup = (Eni_unit *)cup;
125 Eni_vcc *evp = (Eni_vcc *)cvp;
126 struct vccb *vcp = evp->ev_connvc->cvc_vcc;
135 * Validate the VPI and VCI values
137 if ( (vcp->vc_vpi > eup->eu_pif.pif_maxvpi) ||
138 (vcp->vc_vci > eup->eu_pif.pif_maxvci) ) {
139 eup->eu_stats.eni_st_drv.drv_vc_badrng++;
144 * Check if this VCI is already active
146 vct = &eup->eu_vcitbl[ vcp->vc_vci ];
147 if ( vct->vci_control >> VCI_MODE_SHIFT != VCI_MODE_TRASH ) {
152 * Allocate some permanent adapter memory for the reassembly
153 * buffer. Special case the signalling channel(s) buffer size.
154 * Otherwise, the buffer size will be based on whether this is
155 * a server or client card.
157 if ( vcp->vc_vci == UNI_SIG_VCI ) /* HACK */
160 size = (eup->eu_ramsize > MAX_CLIENT_RAM * ENI_BUF_PGSZ) ?
161 RX_SERVER_BSIZE * ENI_BUF_PGSZ :
162 RX_CLIENT_BSIZE * ENI_BUF_PGSZ;
164 if ( ( evp->ev_rxbuf = eni_allocate_buffer ( eup, (u_long *)&size ) )
171 * We only need to open incoming VCI's so outbound VCI's
172 * just get set to CVS_ACTIVE state.
174 if ( ( vcp->vc_type & VCC_IN ) == 0 ) {
176 * Set the state and return - nothing else needs to be done.
178 evp->ev_state = CVS_ACTIVE;
183 * Set the VCI Table entry to start receiving
185 mode = ( evp->ev_connvc->cvc_attr.aal.type == ATM_AAL5
186 ? VCI_MODE_AAL5 : VCI_MODE_AAL0 );
187 size >>= ENI_LOC_PREDIV; /* Predivide by 256 WORDS */
188 for ( nsize = -1; size; nsize++ )
191 vct->vci_control = mode << VCI_MODE_SHIFT |
192 PTI_MODE_TRASH << VCI_PTI_SHIFT |
193 ( (u_int)(evp->ev_rxbuf) >> ENI_LOC_PREDIV ) << VCI_LOC_SHIFT |
194 nsize << VCI_SIZE_SHIFT;
195 vct->vci_descr = 0; /* Descr = Rdptr = 0 */
196 vct->vci_write = 0; /* WritePtr = CellCount = 0 */
201 evp->ev_state = CVS_ACTIVE;
209 * This function is called via the common driver code after receiving a
210 * stack *_TERM* command. The common code has already validated most of
211 * the request so we just need to check a few more ENI-specific details.
216 * cup pointer to device common unit
217 * cvp pointer to common VCC entry
225 eni_closevcc ( cup, cvp )
229 Eni_unit *eup = (Eni_unit *)cup;
230 Eni_vcc *evp = (Eni_vcc *)cvp;
231 struct vccb *vcp = evp->ev_connvc->cvc_vcc;
237 * Clear any references to this VCC in our transmit queue
240 * We'll simply allow any existing TX requests to be
241 * sent as that's easier then pulling them out of
242 * everywhere. Besides, they should be ignored at the
243 * receiver whenever the other end shuts down.
247 * Free the adapter receive buffer
249 (void) eni_free_buffer ( eup, (caddr_t)evp->ev_rxbuf );
252 * If this is an outbound only VCI, then we can close
255 if ( ( vcp->vc_type & VCC_IN ) == 0 ) {
257 * The state will be set to TERM when we return
258 * to the *_TERM caller.
264 * Find VCI entry in VCI Table
266 vct = &eup->eu_vcitbl[ vcp->vc_vci ];
269 * Reset the VCI state
271 vct->vci_control = ( vct->vci_control & VCI_MODE_MASK )
272 /* | VCI_MODE_TRASH */;
273 DELAY ( MIDWAY_DELAY ); /* Give the adapter time to */
274 /* make the transition */
279 KM_ZERO ( (caddr_t)vct, sizeof(VCI_Table) );