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freebsd-nq/sys/dev/hfa/fore_vcm.c
Hartmut Brandt bec064b151 Implement a traffic shaping option for the PCA200 for CBR channels. 
This is controlled by a per-adapter sysctl hw.atm.hfaX.shape. When
set to 0, no shaping occures. When set to 1 at most 1 channel is
shaped. When set to 2 all CBR channels are shaped. Note, that the
latter may actually not work, because of the adapter supporting
the shaping of only one PDU at the same time.
2003-07-31 14:52:44 +00:00

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/*
*
* ===================================
* 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.
*
* @(#) $FreeBSD$
*
*/
/*
* FORE Systems 200-Series Adapter Support
* ---------------------------------------
*
* Virtual Channel Management
*
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <net/if.h>
#include <netatm/port.h>
#include <netatm/queue.h>
#include <netatm/atm.h>
#include <netatm/atm_sys.h>
#include <netatm/atm_sap.h>
#include <netatm/atm_cm.h>
#include <netatm/atm_if.h>
#include <netatm/atm_vc.h>
#include <netatm/atm_stack.h>
#include <netatm/atm_pcb.h>
#include <netatm/atm_var.h>
#include <pci/pcivar.h>
#include <dev/hfa/fore.h>
#include <dev/hfa/fore_aali.h>
#include <dev/hfa/fore_slave.h>
#include <dev/hfa/fore_stats.h>
#include <dev/hfa/fore_var.h>
#include <dev/hfa/fore_include.h>
#ifndef lint
__RCSID("@(#) $FreeBSD$");
#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);
}
static const u_int rate_tab[255] = {
353207, /* 0 */
312501, /* 1 */ 312501, /* 2 */
312501, /* 3 */ 312501, /* 4 */
312501, /* 5 */ 312501, /* 6 */
312501, /* 7 */ 312501, /* 8 */
312501, /* 9 */ 312501, /* 10 */
312501, /* 11 */ 312501, /* 12 */
312501, /* 13 */ 312501, /* 14 */
312501, /* 15 */ 312501, /* 16 */
312501, /* 17 */ 284091, /* 18 */
284091, /* 19 */ 284091, /* 20 */
284091, /* 21 */ 284091, /* 22 */
284091, /* 23 */ 284091, /* 24 */
284091, /* 25 */ 284091, /* 26 */
284091, /* 27 */ 284091, /* 28 */
284091, /* 29 */ 284091, /* 30 */
284091, /* 31 */ 284091, /* 32 */
284091, /* 33 */ 284091, /* 34 */
284091, /* 35 */ 284091, /* 36 */
284091, /* 37 */ 284091, /* 38 */
260417, /* 39 */ 260417, /* 40 */
260417, /* 41 */ 260417, /* 42 */
260417, /* 43 */ 260417, /* 44 */
260417, /* 45 */ 260417, /* 46 */
260417, /* 47 */ 260417, /* 48 */
260417, /* 49 */ 260417, /* 50 */
260417, /* 51 */ 260417, /* 52 */
260417, /* 53 */ 260417, /* 54 */
260417, /* 55 */ 240385, /* 56 */
240385, /* 57 */ 240385, /* 58 */
240385, /* 59 */ 240385, /* 60 */
240385, /* 61 */ 240385, /* 62 */
240385, /* 63 */ 240385, /* 64 */
240385, /* 65 */ 240385, /* 66 */
240385, /* 67 */ 240385, /* 68 */
240385, /* 69 */ 240385, /* 70 */
223215, /* 71 */ 223215, /* 72 */
223215, /* 73 */ 223215, /* 74 */
223215, /* 75 */ 223215, /* 76 */
223215, /* 77 */ 223215, /* 78 */
223215, /* 79 */ 223215, /* 80 */
223215, /* 81 */ 223215, /* 82 */
223215, /* 83 */ 208334, /* 84 */
208334, /* 85 */ 208334, /* 86 */
208334, /* 87 */ 208334, /* 88 */
208334, /* 89 */ 208334, /* 90 */
208334, /* 91 */ 208334, /* 92 */
208334, /* 93 */ 208334, /* 94 */
195313, /* 95 */ 195313, /* 96 */
195313, /* 97 */ 195313, /* 98 */
195313, /* 101 */ 195313, /* 102 */
195313, /* 103 */ 183824, /* 104 */
183824, /* 105 */ 183824, /* 106 */
183824, /* 107 */ 183824, /* 108 */
183824, /* 109 */ 183824, /* 110 */
183824, /* 111 */ 183824, /* 112 */
173612, /* 113 */ 173612, /* 114 */
173612, /* 115 */ 173612, /* 116 */
173612, /* 117 */ 173612, /* 118 */
173612, /* 119 */ 173612, /* 120 */
164474, /* 121 */ 164474, /* 122 */
164474, /* 123 */ 164474, /* 124 */
164474, /* 125 */ 164474, /* 126 */
164474, /* 127 */ 156250, /* 128 */
156250, /* 129 */ 156250, /* 130 */
156250, /* 131 */ 156250, /* 132 */
156250, /* 133 */ 148810, /* 134 */
148810, /* 135 */ 148810, /* 136 */
148810, /* 137 */ 148810, /* 138 */
148810, /* 139 */ 142046, /* 140 */
142046, /* 141 */ 142046, /* 142 */
142046, /* 143 */ 142046, /* 144 */
135870, /* 145 */ 135870, /* 146 */
135870, /* 147 */ 135870, /* 148 */
130209, /* 149 */ 130209, /* 150 */
130209, /* 151 */ 130209, /* 152 */
130209, /* 153 */ 125000, /* 154 */
125000, /* 155 */ 125000, /* 156 */
125000, /* 157 */ 120193, /* 158 */
120193, /* 159 */ 120193, /* 160 */
115741, /* 161 */ 115741, /* 162 */
115741, /* 163 */ 115741, /* 164 */
111608, /* 165 */ 111608, /* 166 */
111608, /* 167 */ 107759, /* 168 */
107759, /* 169 */ 107759, /* 170 */
104167, /* 171 */ 104167, /* 172 */
104167, /* 173 */ 100807, /* 174 */
100807, /* 175 */ 97657, /* 176 */
97657, /* 177 */ 97657, /* 178 */
94697, /* 179 */ 94697, /* 180 */
91912, /* 181 */ 91912, /* 182 */
89286, /* 183 */ 89286, /* 184 */
86806, /* 185 */ 86806, /* 186 */
84460, /* 187 */ 84460, /* 188 */
82237, /* 189 */ 82237, /* 190 */
80129, /* 191 */ 78125, /* 192 */
78126, /* 193 */ 76220, /* 194 */
74405, /* 195 */ 74405, /* 196 */
72675, /* 197 */ 71023, /* 198 */
69445, /* 199 */ 69445, /* 200 */
67935, /* 201 */ 66490, /* 202 */
65105, /* 203 */ 63776, /* 204 */
62500, /* 205 */ 61275, /* 206 */
60097, /* 207 */ 58963, /* 208 */
57871, /* 209 */ 56819, /* 210 */
54825, /* 211 */ 53880, /* 212 */
52967, /* 213 */ 51230, /* 214 */
50404, /* 215 */ 48829, /* 216 */
47349, /* 217 */ 46642, /* 218 */
45290, /* 219 */ 44015, /* 220 */
42809, /* 221 */ 41119, /* 222 */
40065, /* 223 */ 39063, /* 224 */
37651, /* 225 */ 36338, /* 226 */
35113, /* 227 */ 33968, /* 228 */
32553, /* 229 */ 31250, /* 230 */
30049, /* 231 */ 28936, /* 232 */
27655, /* 233 */ 26261, /* 234 */
25000, /* 235 */ 23855, /* 236 */
22645, /* 237 */ 21259, /* 238 */
20033, /* 239 */ 18826, /* 240 */
17557, /* 241 */ 16277, /* 242 */
15025, /* 243 */ 13767, /* 244 */
12551, /* 245 */ 11282, /* 246 */
10017, /* 247 */ 8779, /* 248 */
7531, /* 249 */ 6263, /* 250 */
5017, /* 251 */ 3761, /* 252 */
2509, /* 253 */ 1254, /* 254 */
};
/*
* Find the best match of the high part of the Rate Control Information
*
* This function is called when a VC is opened in order to help
* in converting Fore's rate to PCR.
* The Fore's Rate Control Information is encoded as 32-bit field
* comprised of two 16-bit subfields.
*
* Arguments:
* *pcr Peak Cell Rate, will be updated with actual value
*
* Returns:
* descr the rate descriptor
*
*/
static uint32_t
pcr2rate(int32_t *pcr)
{
u_int i;
if (*pcr >= rate_tab[0]) {
/* special case link rate */
*pcr = rate_tab[0];
return (0);
}
for (i = 0; i < sizeof(rate_tab) / sizeof(rate_tab[0]); i++)
if (*pcr >= rate_tab[i])
break;
if (i == sizeof(rate_tab) / sizeof(rate_tab[0])) {
/* smaller than smallest */
i--;
}
/* update with the actual value */
*pcr = rate_tab[i];
return ((255 - i) << 16) | i;
}
/*
* 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);
}
/*
* Compute the PCR (but only for outgoing VCCs)
*/
fvp->rate = FORE_DEF_RATE;
if ((vcp->vc_type & VCC_OUT) && cvp->cv_connvc) {
Atm_attributes *attr = &cvp->cv_connvc->cvc_attr;
if (attr && attr->traffic.v.forward.PCR_all_traffic > 0 &&
attr->traffic.v.forward.PCR_all_traffic < rate_tab[0] &&
(fup->fu_shape == FUS_SHAPE_ALL ||
(fup->fu_shape == FUS_SHAPE_ONE &&
fup->fu_num_shaped == 0))) {
fvp->rate = pcr2rate(&attr->traffic.v.forward.
PCR_all_traffic);
fup->fu_num_shaped++;
}
}
/*
* 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--;
if (fvp->rate != 0)
fup->fu_num_shaped--;
DEVICE_UNLOCK((Cmn_unit *)fup);
return (err);
}
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