1da177e4c3
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!
242 lines
6.0 KiB
C
242 lines
6.0 KiB
C
/* $Id: message.c,v 1.5.8.2 2001/09/23 22:24:59 kai Exp $
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*
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* functions for sending and receiving control messages
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*
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* Copyright (C) 1996 SpellCaster Telecommunications Inc.
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*
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* This software may be used and distributed according to the terms
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* of the GNU General Public License, incorporated herein by reference.
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*
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* For more information, please contact gpl-info@spellcast.com or write:
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*
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* SpellCaster Telecommunications Inc.
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* 5621 Finch Avenue East, Unit #3
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* Scarborough, Ontario Canada
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* M1B 2T9
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* +1 (416) 297-8565
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* +1 (416) 297-6433 Facsimile
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*/
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#include "includes.h"
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#include "hardware.h"
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#include "message.h"
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#include "card.h"
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extern board *sc_adapter[];
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extern unsigned int cinst;
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/*
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* Obligatory function prototypes
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*/
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extern int indicate_status(int,ulong,char*);
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extern int scm_command(isdn_ctrl *);
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/*
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* receive a message from the board
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*/
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int receivemessage(int card, RspMessage *rspmsg)
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{
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DualPortMemory *dpm;
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unsigned long flags;
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if (!IS_VALID_CARD(card)) {
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pr_debug("Invalid param: %d is not a valid card id\n", card);
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return -EINVAL;
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}
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pr_debug("%s: Entered receivemessage\n",
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sc_adapter[card]->devicename);
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/*
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* See if there are messages waiting
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*/
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if (inb(sc_adapter[card]->ioport[FIFO_STATUS]) & RF_HAS_DATA) {
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/*
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* Map in the DPM to the base page and copy the message
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*/
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spin_lock_irqsave(&sc_adapter[card]->lock, flags);
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outb((sc_adapter[card]->shmem_magic >> 14) | 0x80,
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sc_adapter[card]->ioport[sc_adapter[card]->shmem_pgport]);
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dpm = (DualPortMemory *) sc_adapter[card]->rambase;
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memcpy_fromio(rspmsg, &(dpm->rsp_queue[dpm->rsp_tail]),
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MSG_LEN);
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dpm->rsp_tail = (dpm->rsp_tail+1) % MAX_MESSAGES;
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inb(sc_adapter[card]->ioport[FIFO_READ]);
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spin_unlock_irqrestore(&sc_adapter[card]->lock, flags);
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/*
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* Tell the board that the message is received
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*/
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pr_debug("%s: Received Message seq:%d pid:%d time:%d cmd:%d "
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"cnt:%d (type,class,code):(%d,%d,%d) "
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"link:%d stat:0x%x\n",
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sc_adapter[card]->devicename,
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rspmsg->sequence_no,
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rspmsg->process_id,
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rspmsg->time_stamp,
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rspmsg->cmd_sequence_no,
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rspmsg->msg_byte_cnt,
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rspmsg->type,
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rspmsg->class,
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rspmsg->code,
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rspmsg->phy_link_no,
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rspmsg->rsp_status);
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return 0;
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}
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return -ENOMSG;
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}
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/*
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* send a message to the board
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*/
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int sendmessage(int card,
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unsigned int procid,
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unsigned int type,
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unsigned int class,
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unsigned int code,
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unsigned int link,
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unsigned int data_len,
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unsigned int *data)
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{
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DualPortMemory *dpm;
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ReqMessage sndmsg;
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unsigned long flags;
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if (!IS_VALID_CARD(card)) {
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pr_debug("Invalid param: %d is not a valid card id\n", card);
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return -EINVAL;
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}
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/*
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* Make sure we only send CEPID messages when the engine is up
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* and CMPID messages when it is down
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*/
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if(sc_adapter[card]->EngineUp && procid == CMPID) {
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pr_debug("%s: Attempt to send CM message with engine up\n",
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sc_adapter[card]->devicename);
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return -ESRCH;
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}
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if(!sc_adapter[card]->EngineUp && procid == CEPID) {
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pr_debug("%s: Attempt to send CE message with engine down\n",
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sc_adapter[card]->devicename);
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return -ESRCH;
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}
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memset(&sndmsg, 0, MSG_LEN);
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sndmsg.msg_byte_cnt = 4;
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sndmsg.type = type;
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sndmsg.class = class;
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sndmsg.code = code;
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sndmsg.phy_link_no = link;
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if (data_len > 0) {
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if (data_len > MSG_DATA_LEN)
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data_len = MSG_DATA_LEN;
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memcpy(&(sndmsg.msg_data), data, data_len);
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sndmsg.msg_byte_cnt = data_len + 8;
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}
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sndmsg.process_id = procid;
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sndmsg.sequence_no = sc_adapter[card]->seq_no++ % 256;
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/*
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* wait for an empty slot in the queue
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*/
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while (!(inb(sc_adapter[card]->ioport[FIFO_STATUS]) & WF_NOT_FULL))
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udelay(1);
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/*
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* Disable interrupts and map in shared memory
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*/
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spin_lock_irqsave(&sc_adapter[card]->lock, flags);
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outb((sc_adapter[card]->shmem_magic >> 14) | 0x80,
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sc_adapter[card]->ioport[sc_adapter[card]->shmem_pgport]);
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dpm = (DualPortMemory *) sc_adapter[card]->rambase; /* Fix me */
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memcpy_toio(&(dpm->req_queue[dpm->req_head]),&sndmsg,MSG_LEN);
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dpm->req_head = (dpm->req_head+1) % MAX_MESSAGES;
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outb(sndmsg.sequence_no, sc_adapter[card]->ioport[FIFO_WRITE]);
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spin_unlock_irqrestore(&sc_adapter[card]->lock, flags);
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pr_debug("%s: Sent Message seq:%d pid:%d time:%d "
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"cnt:%d (type,class,code):(%d,%d,%d) "
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"link:%d\n ",
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sc_adapter[card]->devicename,
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sndmsg.sequence_no,
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sndmsg.process_id,
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sndmsg.time_stamp,
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sndmsg.msg_byte_cnt,
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sndmsg.type,
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sndmsg.class,
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sndmsg.code,
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sndmsg.phy_link_no);
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return 0;
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}
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int send_and_receive(int card,
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unsigned int procid,
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unsigned char type,
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unsigned char class,
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unsigned char code,
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unsigned char link,
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unsigned char data_len,
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unsigned char *data,
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RspMessage *mesgdata,
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int timeout)
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{
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int retval;
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int tries;
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if (!IS_VALID_CARD(card)) {
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pr_debug("Invalid param: %d is not a valid card id\n", card);
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return -EINVAL;
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}
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sc_adapter[card]->want_async_messages = 1;
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retval = sendmessage(card, procid, type, class, code, link,
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data_len, (unsigned int *) data);
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if (retval) {
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pr_debug("%s: SendMessage failed in SAR\n",
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sc_adapter[card]->devicename);
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sc_adapter[card]->want_async_messages = 0;
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return -EIO;
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}
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tries = 0;
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/* wait for the response */
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while (tries < timeout) {
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set_current_state(TASK_INTERRUPTIBLE);
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schedule_timeout(1);
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pr_debug("SAR waiting..\n");
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/*
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* See if we got our message back
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*/
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if ((sc_adapter[card]->async_msg.type == type) &&
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(sc_adapter[card]->async_msg.class == class) &&
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(sc_adapter[card]->async_msg.code == code) &&
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(sc_adapter[card]->async_msg.phy_link_no == link)) {
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/*
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* Got it!
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*/
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pr_debug("%s: Got ASYNC message\n",
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sc_adapter[card]->devicename);
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memcpy(mesgdata, &(sc_adapter[card]->async_msg),
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sizeof(RspMessage));
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sc_adapter[card]->want_async_messages = 0;
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return 0;
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}
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tries++;
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}
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pr_debug("%s: SAR message timeout\n", sc_adapter[card]->devicename);
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sc_adapter[card]->want_async_messages = 0;
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return -ETIME;
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}
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