/* $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" 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; }