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linux/drivers/isdn/sc/packet.c
Linus Torvalds 1da177e4c3 Linux-2.6.12-rc2 
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
2005-04-16 15:20:36 -07:00

232 lines
7.3 KiB
C
Raw Blame History

/* $Id: packet.c,v 1.5.8.1 2001/09/23 22:24:59 kai Exp $
*
* Copyright (C) 1996 SpellCaster Telecommunications Inc.
*
* This software may be used and distributed according to the terms
* of the GNU General Public License, incorporated herein by reference.
*
* For more information, please contact gpl-info@spellcast.com or write:
*
* SpellCaster Telecommunications Inc.
* 5621 Finch Avenue East, Unit #3
* Scarborough, Ontario Canada
* M1B 2T9
* +1 (416) 297-8565
* +1 (416) 297-6433 Facsimile
*/
#include "includes.h"
#include "hardware.h"
#include "message.h"
#include "card.h"
extern board *sc_adapter[];
extern unsigned int cinst;
extern int get_card_from_id(int);
extern int indicate_status(int, int,ulong, char*);
extern void memcpy_toshmem(int, void *, const void *, size_t);
extern void memcpy_fromshmem(int, void *, const void *, size_t);
extern int sendmessage(int, unsigned int, unsigned int, unsigned int,
unsigned int, unsigned int, unsigned int, unsigned int *);
int sndpkt(int devId, int channel, struct sk_buff *data)
{
LLData ReqLnkWrite;
int status;
int card;
unsigned long len;
card = get_card_from_id(devId);
if(!IS_VALID_CARD(card)) {
pr_debug("invalid param: %d is not a valid card id\n", card);
return -ENODEV;
}
pr_debug("%s: sndpkt: frst = 0x%x nxt = %d f = %d n = %d\n",
sc_adapter[card]->devicename,
sc_adapter[card]->channel[channel].first_sendbuf,
sc_adapter[card]->channel[channel].next_sendbuf,
sc_adapter[card]->channel[channel].free_sendbufs,
sc_adapter[card]->channel[channel].num_sendbufs);
if(!sc_adapter[card]->channel[channel].free_sendbufs) {
pr_debug("%s: out of TX buffers\n",
sc_adapter[card]->devicename);
return -EINVAL;
}
if(data->len > BUFFER_SIZE) {
pr_debug("%s: data overflows buffer size (data > buffer)\n",
sc_adapter[card]->devicename);
return -EINVAL;
}
ReqLnkWrite.buff_offset = sc_adapter[card]->channel[channel].next_sendbuf *
BUFFER_SIZE + sc_adapter[card]->channel[channel].first_sendbuf;
ReqLnkWrite.msg_len = data->len; /* sk_buff size */
pr_debug("%s: writing %d bytes to buffer offset 0x%x\n",
sc_adapter[card]->devicename,
ReqLnkWrite.msg_len, ReqLnkWrite.buff_offset);
memcpy_toshmem(card, (char *)ReqLnkWrite.buff_offset, data->data, ReqLnkWrite.msg_len);
/*
* sendmessage
*/
pr_debug("%s: sndpkt size=%d, buf_offset=0x%x buf_indx=%d\n",
sc_adapter[card]->devicename,
ReqLnkWrite.msg_len, ReqLnkWrite.buff_offset,
sc_adapter[card]->channel[channel].next_sendbuf);
status = sendmessage(card, CEPID, ceReqTypeLnk, ceReqClass1, ceReqLnkWrite,
channel+1, sizeof(LLData), (unsigned int*)&ReqLnkWrite);
len = data->len;
if(status) {
pr_debug("%s: failed to send packet, status = %d\n",
sc_adapter[card]->devicename, status);
return -1;
}
else {
sc_adapter[card]->channel[channel].free_sendbufs--;
sc_adapter[card]->channel[channel].next_sendbuf =
++sc_adapter[card]->channel[channel].next_sendbuf ==
sc_adapter[card]->channel[channel].num_sendbufs ? 0 :
sc_adapter[card]->channel[channel].next_sendbuf;
pr_debug("%s: packet sent successfully\n", sc_adapter[card]->devicename);
dev_kfree_skb(data);
indicate_status(card,ISDN_STAT_BSENT,channel, (char *)&len);
}
return len;
}
void rcvpkt(int card, RspMessage *rcvmsg)
{
LLData newll;
struct sk_buff *skb;
if(!IS_VALID_CARD(card)) {
pr_debug("invalid param: %d is not a valid card id\n", card);
return;
}
switch(rcvmsg->rsp_status){
case 0x01:
case 0x02:
case 0x70:
pr_debug("%s: error status code: 0x%x\n",
sc_adapter[card]->devicename, rcvmsg->rsp_status);
return;
case 0x00:
if (!(skb = dev_alloc_skb(rcvmsg->msg_data.response.msg_len))) {
printk(KERN_WARNING "%s: rcvpkt out of memory, dropping packet\n",
sc_adapter[card]->devicename);
return;
}
skb_put(skb, rcvmsg->msg_data.response.msg_len);
pr_debug("%s: getting data from offset: 0x%x\n",
sc_adapter[card]->devicename,
rcvmsg->msg_data.response.buff_offset);
memcpy_fromshmem(card,
skb_put(skb, rcvmsg->msg_data.response.msg_len),
(char *)rcvmsg->msg_data.response.buff_offset,
rcvmsg->msg_data.response.msg_len);
sc_adapter[card]->card->rcvcallb_skb(sc_adapter[card]->driverId,
rcvmsg->phy_link_no-1, skb);
case 0x03:
/*
* Recycle the buffer
*/
pr_debug("%s: buffer size : %d\n",
sc_adapter[card]->devicename, BUFFER_SIZE);
/* memset_shmem(card, rcvmsg->msg_data.response.buff_offset, 0, BUFFER_SIZE); */
newll.buff_offset = rcvmsg->msg_data.response.buff_offset;
newll.msg_len = BUFFER_SIZE;
pr_debug("%s: recycled buffer at offset 0x%x size %d\n",
sc_adapter[card]->devicename,
newll.buff_offset, newll.msg_len);
sendmessage(card, CEPID, ceReqTypeLnk, ceReqClass1, ceReqLnkRead,
rcvmsg->phy_link_no, sizeof(LLData), (unsigned int *)&newll);
}
}
int setup_buffers(int card, int c)
{
unsigned int nBuffers, i, cBase;
unsigned int buffer_size;
LLData RcvBuffOffset;
if(!IS_VALID_CARD(card)) {
pr_debug("invalid param: %d is not a valid card id\n", card);
return -ENODEV;
}
/*
* Calculate the buffer offsets (send/recv/send/recv)
*/
pr_debug("%s: setting up channel buffer space in shared RAM\n",
sc_adapter[card]->devicename);
buffer_size = BUFFER_SIZE;
nBuffers = ((sc_adapter[card]->ramsize - BUFFER_BASE) / buffer_size) / 2;
nBuffers = nBuffers > BUFFERS_MAX ? BUFFERS_MAX : nBuffers;
pr_debug("%s: calculating buffer space: %d buffers, %d big\n",
sc_adapter[card]->devicename,
nBuffers, buffer_size);
if(nBuffers < 2) {
pr_debug("%s: not enough buffer space\n",
sc_adapter[card]->devicename);
return -1;
}
cBase = (nBuffers * buffer_size) * (c - 1);
pr_debug("%s: channel buffer offset from shared RAM: 0x%x\n",
sc_adapter[card]->devicename, cBase);
sc_adapter[card]->channel[c-1].first_sendbuf = BUFFER_BASE + cBase;
sc_adapter[card]->channel[c-1].num_sendbufs = nBuffers / 2;
sc_adapter[card]->channel[c-1].free_sendbufs = nBuffers / 2;
sc_adapter[card]->channel[c-1].next_sendbuf = 0;
pr_debug("%s: send buffer setup complete: first=0x%x n=%d f=%d, nxt=%d\n",
sc_adapter[card]->devicename,
sc_adapter[card]->channel[c-1].first_sendbuf,
sc_adapter[card]->channel[c-1].num_sendbufs,
sc_adapter[card]->channel[c-1].free_sendbufs,
sc_adapter[card]->channel[c-1].next_sendbuf);
/*
* Prep the receive buffers
*/
pr_debug("%s: adding %d RecvBuffers:\n",
sc_adapter[card]->devicename, nBuffers /2);
for (i = 0 ; i < nBuffers / 2; i++) {
RcvBuffOffset.buff_offset =
((sc_adapter[card]->channel[c-1].first_sendbuf +
(nBuffers / 2) * buffer_size) + (buffer_size * i));
RcvBuffOffset.msg_len = buffer_size;
pr_debug("%s: adding RcvBuffer #%d offset=0x%x sz=%d bufsz:%d\n",
sc_adapter[card]->devicename,
i + 1, RcvBuffOffset.buff_offset,
RcvBuffOffset.msg_len,buffer_size);
sendmessage(card, CEPID, ceReqTypeLnk, ceReqClass1, ceReqLnkRead,
c, sizeof(LLData), (unsigned int *)&RcvBuffOffset);
}
return 0;
}
int print_skb(int card,char *skb_p, int len){
int i,data;
pr_debug("%s: data at 0x%x len: 0x%x\n", sc_adapter[card]->devicename,
skb_p,len);
for(i=1;i<=len;i++,skb_p++){
data = (int) (0xff & (*skb_p));
pr_debug("%s: data = 0x%x", sc_adapter[card]->devicename,data);
if(!(i%4))
pr_debug(" ");
if(!(i%32))
pr_debug("\n");
}
pr_debug("\n");
return 0;
}
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