kevin/linux
1
Fork 0
Code
2920349d43
linux/drivers/isdn/sc/packet.c
Jeff Garzik 76fd020937 [PATCH] ISDN: several minor fixes 
pcbit: kill 'may be used uninitialized' warning.  although the code does
eventually fill the 32 bits it cares about, the variable truly is
accessed uninitialized in each macro.  Easier to just clean it up now.

sc: fix a ton of obviously incorrect printk's (some with missing
arguments even)

Signed-off-by: Jeff Garzik <jeff@garzik.org>
Acked-by: Karsten Keil <kkeil@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-10-11 11:14:25 -07:00

216 lines
6.9 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%lx 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%lx\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%lx 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%lx\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%lx 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%lx 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%lx 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;
}
View Git Blame Copy Permalink