| 1 |
1275 |
phoenix |
/* $Id: tpam_queues.c,v 1.1.1.1 2004-04-15 02:03:59 phoenix Exp $
|
| 2 |
|
|
*
|
| 3 |
|
|
* Turbo PAM ISDN driver for Linux. (Kernel Driver)
|
| 4 |
|
|
*
|
| 5 |
|
|
* Copyright 2001 Stelian Pop <stelian.pop@fr.alcove.com>, Alcôve
|
| 6 |
|
|
*
|
| 7 |
|
|
* This software may be used and distributed according to the terms
|
| 8 |
|
|
* of the GNU General Public License, incorporated herein by reference.
|
| 9 |
|
|
*
|
| 10 |
|
|
* For all support questions please contact: <support@auvertech.fr>
|
| 11 |
|
|
*
|
| 12 |
|
|
*/
|
| 13 |
|
|
|
| 14 |
|
|
#include <linux/pci.h>
|
| 15 |
|
|
#include <linux/sched.h>
|
| 16 |
|
|
#include <linux/tqueue.h>
|
| 17 |
|
|
#include <linux/interrupt.h>
|
| 18 |
|
|
#include <asm/io.h>
|
| 19 |
|
|
|
| 20 |
|
|
#include "tpam.h"
|
| 21 |
|
|
|
| 22 |
|
|
/* Local function prototype */
|
| 23 |
|
|
static int tpam_sendpacket(tpam_card *card, tpam_channel *channel);
|
| 24 |
|
|
|
| 25 |
|
|
/*
|
| 26 |
|
|
* Queue a message to be send to the card when possible.
|
| 27 |
|
|
*
|
| 28 |
|
|
* card: the board
|
| 29 |
|
|
* skb: the sk_buff containing the message.
|
| 30 |
|
|
*/
|
| 31 |
|
|
void tpam_enqueue(tpam_card *card, struct sk_buff *skb) {
|
| 32 |
|
|
|
| 33 |
|
|
dprintk("TurboPAM(tpam_enqueue): card=%d\n", card->id);
|
| 34 |
|
|
|
| 35 |
|
|
/* queue the sk_buff on the board's send queue */
|
| 36 |
|
|
skb_queue_tail(&card->sendq, skb);
|
| 37 |
|
|
|
| 38 |
|
|
/* queue the board's send task struct for immediate treatment */
|
| 39 |
|
|
queue_task(&card->send_tq, &tq_immediate);
|
| 40 |
|
|
mark_bh(IMMEDIATE_BH);
|
| 41 |
|
|
}
|
| 42 |
|
|
|
| 43 |
|
|
/*
|
| 44 |
|
|
* Queue a data message to be send to the card when possible.
|
| 45 |
|
|
*
|
| 46 |
|
|
* card: the board
|
| 47 |
|
|
* skb: the sk_buff containing the message and the data. This parameter
|
| 48 |
|
|
* can be NULL if we want just to trigger the send of queued
|
| 49 |
|
|
* messages.
|
| 50 |
|
|
*/
|
| 51 |
|
|
void tpam_enqueue_data(tpam_channel *channel, struct sk_buff *skb) {
|
| 52 |
|
|
|
| 53 |
|
|
dprintk("TurboPAM(tpam_enqueue_data): card=%d, channel=%d\n",
|
| 54 |
|
|
channel->card->id, channel->num);
|
| 55 |
|
|
|
| 56 |
|
|
/* if existant, queue the sk_buff on the channel's send queue */
|
| 57 |
|
|
if (skb)
|
| 58 |
|
|
skb_queue_tail(&channel->sendq, skb);
|
| 59 |
|
|
|
| 60 |
|
|
/* queue the channel's send task struct for immediate treatment */
|
| 61 |
|
|
queue_task(&channel->card->send_tq, &tq_immediate);
|
| 62 |
|
|
mark_bh(IMMEDIATE_BH);
|
| 63 |
|
|
}
|
| 64 |
|
|
|
| 65 |
|
|
/*
|
| 66 |
|
|
* IRQ handler.
|
| 67 |
|
|
*
|
| 68 |
|
|
* If a message comes from the board we read it, construct a sk_buff containing
|
| 69 |
|
|
* the message and we queue the sk_buff on the board's receive queue, and we
|
| 70 |
|
|
* trigger the execution of the board's receive task queue.
|
| 71 |
|
|
*
|
| 72 |
|
|
* If a message ack comes from the board we can go on and send a new message,
|
| 73 |
|
|
* so we trigger the execution of the board's send task queue.
|
| 74 |
|
|
*
|
| 75 |
|
|
* irq: the irq number
|
| 76 |
|
|
* dev_id: the registered board to the irq
|
| 77 |
|
|
* regs: not used.
|
| 78 |
|
|
*/
|
| 79 |
|
|
void tpam_irq(int irq, void *dev_id, struct pt_regs *regs) {
|
| 80 |
|
|
tpam_card *card = (tpam_card *)dev_id;
|
| 81 |
|
|
u32 ackupload, uploadptr;
|
| 82 |
|
|
u32 waiting_too_long;
|
| 83 |
|
|
u32 hpic;
|
| 84 |
|
|
struct sk_buff *skb;
|
| 85 |
|
|
pci_mpb mpb;
|
| 86 |
|
|
skb_header *skbh;
|
| 87 |
|
|
|
| 88 |
|
|
dprintk("TurboPAM(tpam_irq): IRQ received, card=%d\n", card->id);
|
| 89 |
|
|
|
| 90 |
|
|
/* grab the board lock */
|
| 91 |
|
|
spin_lock(&card->lock);
|
| 92 |
|
|
|
| 93 |
|
|
/* get the message type */
|
| 94 |
|
|
ackupload = copy_from_pam_dword(card, (void *)TPAM_ACKUPLOAD_REGISTER);
|
| 95 |
|
|
|
| 96 |
|
|
/* acknowledge the interrupt */
|
| 97 |
|
|
copy_to_pam_dword(card, (void *)TPAM_INTERRUPTACK_REGISTER, 0);
|
| 98 |
|
|
readl(card->bar0 + TPAM_HINTACK_REGISTER);
|
| 99 |
|
|
|
| 100 |
|
|
if (!ackupload) {
|
| 101 |
|
|
/* it is a new message from the board */
|
| 102 |
|
|
|
| 103 |
|
|
dprintk("TurboPAM(tpam_irq): message received, card=%d\n",
|
| 104 |
|
|
card->id);
|
| 105 |
|
|
|
| 106 |
|
|
/* get the upload pointer */
|
| 107 |
|
|
uploadptr = copy_from_pam_dword(card,
|
| 108 |
|
|
(void *)TPAM_UPLOADPTR_REGISTER);
|
| 109 |
|
|
|
| 110 |
|
|
/* get the beginning of the message (pci_mpb part) */
|
| 111 |
|
|
copy_from_pam(card, &mpb, (void *)uploadptr, sizeof(pci_mpb));
|
| 112 |
|
|
|
| 113 |
|
|
/* allocate the sk_buff */
|
| 114 |
|
|
if (!(skb = alloc_skb(sizeof(skb_header) + sizeof(pci_mpb) +
|
| 115 |
|
|
mpb.actualBlockTLVSize +
|
| 116 |
|
|
mpb.actualDataSize, GFP_ATOMIC))) {
|
| 117 |
|
|
printk(KERN_ERR "TurboPAM(tpam_irq): "
|
| 118 |
|
|
"alloc_skb failed\n");
|
| 119 |
|
|
spin_unlock(&card->lock);
|
| 120 |
|
|
return;
|
| 121 |
|
|
}
|
| 122 |
|
|
|
| 123 |
|
|
/* build the skb_header */
|
| 124 |
|
|
skbh = (skb_header *)skb_put(skb, sizeof(skb_header));
|
| 125 |
|
|
skbh->size = sizeof(pci_mpb) + mpb.actualBlockTLVSize;
|
| 126 |
|
|
skbh->data_size = mpb.actualDataSize;
|
| 127 |
|
|
skbh->ack = 0;
|
| 128 |
|
|
skbh->ack_size = 0;
|
| 129 |
|
|
|
| 130 |
|
|
/* copy the pci_mpb into the sk_buff */
|
| 131 |
|
|
memcpy(skb_put(skb, sizeof(pci_mpb)), &mpb, sizeof(pci_mpb));
|
| 132 |
|
|
|
| 133 |
|
|
/* copy the TLV block into the sk_buff */
|
| 134 |
|
|
copy_from_pam(card, skb_put(skb, mpb.actualBlockTLVSize),
|
| 135 |
|
|
(void *)uploadptr + sizeof(pci_mpb),
|
| 136 |
|
|
mpb.actualBlockTLVSize);
|
| 137 |
|
|
|
| 138 |
|
|
/* if existent, copy the data block into the sk_buff */
|
| 139 |
|
|
if (mpb.actualDataSize)
|
| 140 |
|
|
copy_from_pam(card, skb_put(skb, mpb.actualDataSize),
|
| 141 |
|
|
(void *)uploadptr + sizeof(pci_mpb) + 4096,
|
| 142 |
|
|
mpb.actualDataSize);
|
| 143 |
|
|
|
| 144 |
|
|
/* wait for the board to become ready */
|
| 145 |
|
|
waiting_too_long = 0;
|
| 146 |
|
|
do {
|
| 147 |
|
|
hpic = readl(card->bar0 + TPAM_HPIC_REGISTER);
|
| 148 |
|
|
if (waiting_too_long++ > 0xfffffff) {
|
| 149 |
|
|
kfree_skb(skb);
|
| 150 |
|
|
spin_unlock(&card->lock);
|
| 151 |
|
|
printk(KERN_ERR "TurboPAM(tpam_irq): "
|
| 152 |
|
|
"waiting too long...\n");
|
| 153 |
|
|
return;
|
| 154 |
|
|
}
|
| 155 |
|
|
} while (hpic & 0x00000002);
|
| 156 |
|
|
|
| 157 |
|
|
/* acknowledge the message */
|
| 158 |
|
|
copy_to_pam_dword(card, (void *)TPAM_ACKDOWNLOAD_REGISTER,
|
| 159 |
|
|
0xffffffff);
|
| 160 |
|
|
readl(card->bar0 + TPAM_DSPINT_REGISTER);
|
| 161 |
|
|
|
| 162 |
|
|
/* release the board lock */
|
| 163 |
|
|
spin_unlock(&card->lock);
|
| 164 |
|
|
|
| 165 |
|
|
if (mpb.messageID == ID_U3ReadyToReceiveInd) {
|
| 166 |
|
|
/* this message needs immediate treatment */
|
| 167 |
|
|
tpam_recv_U3ReadyToReceiveInd(card, skb);
|
| 168 |
|
|
kfree_skb(skb);
|
| 169 |
|
|
}
|
| 170 |
|
|
else {
|
| 171 |
|
|
/* put the message in the receive queue */
|
| 172 |
|
|
skb_queue_tail(&card->recvq, skb);
|
| 173 |
|
|
queue_task(&card->recv_tq, &tq_immediate);
|
| 174 |
|
|
mark_bh(IMMEDIATE_BH);
|
| 175 |
|
|
}
|
| 176 |
|
|
return;
|
| 177 |
|
|
}
|
| 178 |
|
|
else {
|
| 179 |
|
|
/* it is a ack from the board */
|
| 180 |
|
|
|
| 181 |
|
|
dprintk("TurboPAM(tpam_irq): message acknowledged, card=%d\n",
|
| 182 |
|
|
card->id);
|
| 183 |
|
|
|
| 184 |
|
|
/* board is not busy anymore */
|
| 185 |
|
|
card->busy = 0;
|
| 186 |
|
|
|
| 187 |
|
|
/* release the lock */
|
| 188 |
|
|
spin_unlock(&card->lock);
|
| 189 |
|
|
|
| 190 |
|
|
/* schedule the send queue for execution */
|
| 191 |
|
|
queue_task(&card->send_tq, &tq_immediate);
|
| 192 |
|
|
mark_bh(IMMEDIATE_BH);
|
| 193 |
|
|
return;
|
| 194 |
|
|
}
|
| 195 |
|
|
|
| 196 |
|
|
/* not reached */
|
| 197 |
|
|
}
|
| 198 |
|
|
|
| 199 |
|
|
/*
|
| 200 |
|
|
* Run the board's receive task queue, dispatching each message on the queue,
|
| 201 |
|
|
* to its treatment function.
|
| 202 |
|
|
*
|
| 203 |
|
|
* card: the board.
|
| 204 |
|
|
*/
|
| 205 |
|
|
void tpam_recv_tq(tpam_card *card) {
|
| 206 |
|
|
pci_mpb *p;
|
| 207 |
|
|
struct sk_buff *skb;
|
| 208 |
|
|
|
| 209 |
|
|
/* for each message on the receive queue... */
|
| 210 |
|
|
while ((skb = skb_dequeue(&card->recvq))) {
|
| 211 |
|
|
|
| 212 |
|
|
/* point to the pci_mpb block */
|
| 213 |
|
|
p = (pci_mpb *)(skb->data + sizeof(skb_header));
|
| 214 |
|
|
|
| 215 |
|
|
/* dispatch the message */
|
| 216 |
|
|
switch (p->messageID) {
|
| 217 |
|
|
case ID_ACreateNCOCnf:
|
| 218 |
|
|
tpam_recv_ACreateNCOCnf(card, skb);
|
| 219 |
|
|
break;
|
| 220 |
|
|
case ID_ADestroyNCOCnf:
|
| 221 |
|
|
tpam_recv_ADestroyNCOCnf(card, skb);
|
| 222 |
|
|
break;
|
| 223 |
|
|
case ID_CConnectCnf:
|
| 224 |
|
|
tpam_recv_CConnectCnf(card, skb);
|
| 225 |
|
|
break;
|
| 226 |
|
|
case ID_CConnectInd:
|
| 227 |
|
|
tpam_recv_CConnectInd(card, skb);
|
| 228 |
|
|
break;
|
| 229 |
|
|
case ID_CDisconnectInd:
|
| 230 |
|
|
tpam_recv_CDisconnectInd(card, skb);
|
| 231 |
|
|
break;
|
| 232 |
|
|
case ID_CDisconnectCnf:
|
| 233 |
|
|
tpam_recv_CDisconnectCnf(card, skb);
|
| 234 |
|
|
break;
|
| 235 |
|
|
case ID_U3DataInd:
|
| 236 |
|
|
tpam_recv_U3DataInd(card, skb);
|
| 237 |
|
|
break;
|
| 238 |
|
|
default:
|
| 239 |
|
|
dprintk("TurboPAM(tpam_recv_tq): "
|
| 240 |
|
|
"unknown messageID %d, card=%d\n",
|
| 241 |
|
|
p->messageID, card->id);
|
| 242 |
|
|
break;
|
| 243 |
|
|
}
|
| 244 |
|
|
/* free the sk_buff */
|
| 245 |
|
|
kfree_skb(skb);
|
| 246 |
|
|
}
|
| 247 |
|
|
}
|
| 248 |
|
|
|
| 249 |
|
|
/*
|
| 250 |
|
|
* Run the board's send task queue. If there is a message in the board's send
|
| 251 |
|
|
* queue, it gets sended. If not, it examines each channel (one at the time,
|
| 252 |
|
|
* using a round robin algorithm). For each channel, if there is a message
|
| 253 |
|
|
* in the channel's send queue, it gets sended. This function sends only one
|
| 254 |
|
|
* message, it does not consume all the queue.
|
| 255 |
|
|
*/
|
| 256 |
|
|
void tpam_send_tq(tpam_card *card) {
|
| 257 |
|
|
int i;
|
| 258 |
|
|
|
| 259 |
|
|
/* first, try to send a packet from the board's send queue */
|
| 260 |
|
|
if (tpam_sendpacket(card, NULL))
|
| 261 |
|
|
return;
|
| 262 |
|
|
|
| 263 |
|
|
/* then, try each channel, in a round-robin manner */
|
| 264 |
|
|
for (i=card->roundrobin; i<card->roundrobin+card->channels_used; i++) {
|
| 265 |
|
|
if (tpam_sendpacket(card,
|
| 266 |
|
|
&card->channels[i % card->channels_used])) {
|
| 267 |
|
|
card->roundrobin = (i + 1) % card->channels_used;
|
| 268 |
|
|
return;
|
| 269 |
|
|
}
|
| 270 |
|
|
}
|
| 271 |
|
|
}
|
| 272 |
|
|
|
| 273 |
|
|
/*
|
| 274 |
|
|
* Try to send a packet from the board's send queue or from the channel's
|
| 275 |
|
|
* send queue.
|
| 276 |
|
|
*
|
| 277 |
|
|
* card: the board.
|
| 278 |
|
|
* channel: the channel (if NULL, the packet will be taken from the
|
| 279 |
|
|
* board's send queue. If not, it will be taken from the
|
| 280 |
|
|
* channel's send queue.
|
| 281 |
|
|
*
|
| 282 |
|
|
* Return: 0 if tpam_send_tq must try another card/channel combination
|
| 283 |
|
|
* (meaning that no packet has been send), 1 if no more packets
|
| 284 |
|
|
* can be send at that time (a packet has been send or the card is
|
| 285 |
|
|
* still busy from a previous send).
|
| 286 |
|
|
*/
|
| 287 |
|
|
static int tpam_sendpacket(tpam_card *card, tpam_channel *channel) {
|
| 288 |
|
|
struct sk_buff *skb;
|
| 289 |
|
|
u32 hpic;
|
| 290 |
|
|
u32 downloadptr;
|
| 291 |
|
|
skb_header *skbh;
|
| 292 |
|
|
u32 waiting_too_long;
|
| 293 |
|
|
|
| 294 |
|
|
dprintk("TurboPAM(tpam_sendpacket), card=%d, channel=%d\n",
|
| 295 |
|
|
card->id, channel ? channel->num : -1);
|
| 296 |
|
|
|
| 297 |
|
|
if (channel) {
|
| 298 |
|
|
/* dequeue a packet from the channel's send queue */
|
| 299 |
|
|
if (!(skb = skb_dequeue(&channel->sendq))) {
|
| 300 |
|
|
dprintk("TurboPAM(tpam_sendpacket): "
|
| 301 |
|
|
"card=%d, channel=%d, no packet\n",
|
| 302 |
|
|
card->id, channel->num);
|
| 303 |
|
|
return 0;
|
| 304 |
|
|
}
|
| 305 |
|
|
|
| 306 |
|
|
/* if the channel is not ready to receive, requeue the packet
|
| 307 |
|
|
* and return 0 to give a chance to another channel */
|
| 308 |
|
|
if (!channel->readytoreceive) {
|
| 309 |
|
|
dprintk("TurboPAM(tpam_sendpacket): "
|
| 310 |
|
|
"card=%d, channel=%d, channel not ready\n",
|
| 311 |
|
|
card->id, channel->num);
|
| 312 |
|
|
skb_queue_head(&channel->sendq, skb);
|
| 313 |
|
|
return 0;
|
| 314 |
|
|
}
|
| 315 |
|
|
|
| 316 |
|
|
/* grab the board lock */
|
| 317 |
|
|
spin_lock_irq(&card->lock);
|
| 318 |
|
|
|
| 319 |
|
|
/* if the board is busy, requeue the packet and return 1 since
|
| 320 |
|
|
* there is no need to try another channel */
|
| 321 |
|
|
if (card->busy) {
|
| 322 |
|
|
dprintk("TurboPAM(tpam_sendpacket): "
|
| 323 |
|
|
"card=%d, channel=%d, card busy\n",
|
| 324 |
|
|
card->id, channel->num);
|
| 325 |
|
|
skb_queue_head(&channel->sendq, skb);
|
| 326 |
|
|
spin_unlock_irq(&card->lock);
|
| 327 |
|
|
return 1;
|
| 328 |
|
|
}
|
| 329 |
|
|
}
|
| 330 |
|
|
else {
|
| 331 |
|
|
/* dequeue a packet from the board's send queue */
|
| 332 |
|
|
if (!(skb = skb_dequeue(&card->sendq))) {
|
| 333 |
|
|
dprintk("TurboPAM(tpam_sendpacket): "
|
| 334 |
|
|
"card=%d, no packet\n", card->id);
|
| 335 |
|
|
return 0;
|
| 336 |
|
|
}
|
| 337 |
|
|
|
| 338 |
|
|
/* grab the board lock */
|
| 339 |
|
|
spin_lock_irq(&card->lock);
|
| 340 |
|
|
|
| 341 |
|
|
/* if the board is busy, requeue the packet and return 1 since
|
| 342 |
|
|
* there is no need to try another channel */
|
| 343 |
|
|
if (card->busy) {
|
| 344 |
|
|
dprintk("TurboPAM(tpam_sendpacket): "
|
| 345 |
|
|
"card=%d, card busy\n", card->id);
|
| 346 |
|
|
skb_queue_head(&card->sendq, skb);
|
| 347 |
|
|
spin_unlock_irq(&card->lock);
|
| 348 |
|
|
return 1;
|
| 349 |
|
|
}
|
| 350 |
|
|
}
|
| 351 |
|
|
|
| 352 |
|
|
/* wait for the board to become ready */
|
| 353 |
|
|
waiting_too_long = 0;
|
| 354 |
|
|
do {
|
| 355 |
|
|
hpic = readl(card->bar0 + TPAM_HPIC_REGISTER);
|
| 356 |
|
|
if (waiting_too_long++ > 0xfffffff) {
|
| 357 |
|
|
spin_unlock_irq(&card->lock);
|
| 358 |
|
|
printk(KERN_ERR "TurboPAM(tpam_sendpacket): "
|
| 359 |
|
|
"waiting too long...\n");
|
| 360 |
|
|
return 1;
|
| 361 |
|
|
}
|
| 362 |
|
|
} while (hpic & 0x00000002);
|
| 363 |
|
|
|
| 364 |
|
|
skbh = (skb_header *)skb->data;
|
| 365 |
|
|
dprintk("TurboPAM(tpam_sendpacket): "
|
| 366 |
|
|
"card=%d, card ready, sending %d/%d bytes\n",
|
| 367 |
|
|
card->id, skbh->size, skbh->data_size);
|
| 368 |
|
|
|
| 369 |
|
|
/* get the board's download pointer */
|
| 370 |
|
|
downloadptr = copy_from_pam_dword(card,
|
| 371 |
|
|
(void *)TPAM_DOWNLOADPTR_REGISTER);
|
| 372 |
|
|
|
| 373 |
|
|
/* copy the packet to the board at the downloadptr location */
|
| 374 |
|
|
copy_to_pam(card, (void *)downloadptr, skb->data + sizeof(skb_header),
|
| 375 |
|
|
skbh->size);
|
| 376 |
|
|
if (skbh->data_size)
|
| 377 |
|
|
/* if there is some data in the packet, copy it too */
|
| 378 |
|
|
copy_to_pam(card, (void *)downloadptr + sizeof(pci_mpb) + 4096,
|
| 379 |
|
|
skb->data + sizeof(skb_header) + skbh->size,
|
| 380 |
|
|
skbh->data_size);
|
| 381 |
|
|
|
| 382 |
|
|
/* card will become busy right now */
|
| 383 |
|
|
card->busy = 1;
|
| 384 |
|
|
|
| 385 |
|
|
/* interrupt the board */
|
| 386 |
|
|
copy_to_pam_dword(card, (void *)TPAM_ACKDOWNLOAD_REGISTER, 0);
|
| 387 |
|
|
readl(card->bar0 + TPAM_DSPINT_REGISTER);
|
| 388 |
|
|
|
| 389 |
|
|
/* release the lock */
|
| 390 |
|
|
spin_unlock_irq(&card->lock);
|
| 391 |
|
|
|
| 392 |
|
|
/* if a data ack was requested by the ISDN link layer, send it now */
|
| 393 |
|
|
if (skbh->ack) {
|
| 394 |
|
|
isdn_ctrl ctrl;
|
| 395 |
|
|
ctrl.driver = card->id;
|
| 396 |
|
|
ctrl.command = ISDN_STAT_BSENT;
|
| 397 |
|
|
ctrl.arg = channel->num;
|
| 398 |
|
|
ctrl.parm.length = skbh->ack_size;
|
| 399 |
|
|
(* card->interface.statcallb)(&ctrl);
|
| 400 |
|
|
}
|
| 401 |
|
|
|
| 402 |
|
|
/* free the sk_buff */
|
| 403 |
|
|
kfree_skb(skb);
|
| 404 |
|
|
|
| 405 |
|
|
return 1;
|
| 406 |
|
|
}
|
| 407 |
|
|
|
