mirror of https://gitee.com/openkylin/linux.git
216 lines
6.9 KiB
C
216 lines
6.9 KiB
C
/* $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;
|
|
}
|
|
|