wanpipe_multppp.c

移植到2410开发板上的源代码

			/* These two commands are executed for
			 * each request */
			case READ_CHDLC_CONFIGURATION:
			case READ_CHDLC_CODE_VERSION:
				udp_mgmt_req_valid = 1;
				break;
			default:
				udp_mgmt_req_valid = 0;
				break;
		} 
	}
	
  	if(!udp_mgmt_req_valid) {

		/* set length to 0 */
		chdlc_udp_pkt->cblock.buffer_length = 0;

    		/* set return code */
		chdlc_udp_pkt->cblock.return_code = 0xCD;

		if (net_ratelimit()){	
			printk(KERN_INFO 
			"%s: Warning, Illegal UDP command attempted from network: %x\n",
			card->devname,chdlc_udp_pkt->cblock.command);
		}

   	} else {
	   	unsigned long trace_status_cfg_addr = 0;
		TRACE_STATUS_EL_CFG_STRUCT trace_cfg_struct;
		TRACE_STATUS_ELEMENT_STRUCT trace_element_struct;

		switch(chdlc_udp_pkt->cblock.command) {

		case CPIPE_ENABLE_TRACING:
		     if (!chdlc_priv_area->TracingEnabled) {

			/* OPERATE_DATALINE_MONITOR */

			mb->buffer_length = sizeof(LINE_TRACE_CONFIG_STRUCT);
			mb->command = SET_TRACE_CONFIGURATION;

    			((LINE_TRACE_CONFIG_STRUCT *)mb->data)->
				trace_config = TRACE_ACTIVE;
			/* Trace delay mode is not used because it slows
			   down transfer and results in a standoff situation
			   when there is a lot of data */

			/* Configure the Trace based on user inputs */
			((LINE_TRACE_CONFIG_STRUCT *)mb->data)->trace_config |= 
					chdlc_udp_pkt->data[0];

			((LINE_TRACE_CONFIG_STRUCT *)mb->data)->
			   trace_deactivation_timer = 4000;


			err = sdla_exec(mb) ? mb->return_code : CMD_TIMEOUT;
			if (err != COMMAND_OK) {
				chdlc_error(card,err,mb);
				card->TracingEnabled = 0;
				chdlc_udp_pkt->cblock.return_code = err;
				mb->buffer_length = 0;
				break;
	    		} 

			/* Get the base address of the trace element list */
			mb->buffer_length = 0;
			mb->command = READ_TRACE_CONFIGURATION;
			err = sdla_exec(mb) ? mb->return_code : CMD_TIMEOUT;

			if (err != COMMAND_OK) {
				chdlc_error(card,err,mb);
				chdlc_priv_area->TracingEnabled = 0;
				chdlc_udp_pkt->cblock.return_code = err;
				mb->buffer_length = 0;
				break;
	    		} 	

	   		trace_status_cfg_addr =((LINE_TRACE_CONFIG_STRUCT *)
				mb->data) -> ptr_trace_stat_el_cfg_struct;

			sdla_peek(&card->hw, trace_status_cfg_addr,
				 &trace_cfg_struct, sizeof(trace_cfg_struct));
		    
			chdlc_priv_area->start_trace_addr = trace_cfg_struct.
				base_addr_trace_status_elements;

			chdlc_priv_area->number_trace_elements = 
					trace_cfg_struct.number_trace_status_elements;

			chdlc_priv_area->end_trace_addr = (unsigned long)
					((TRACE_STATUS_ELEMENT_STRUCT *)
					 chdlc_priv_area->start_trace_addr + 
					 (chdlc_priv_area->number_trace_elements - 1));

			chdlc_priv_area->base_addr_trace_buffer = 
					trace_cfg_struct.base_addr_trace_buffer;

			chdlc_priv_area->end_addr_trace_buffer = 
					trace_cfg_struct.end_addr_trace_buffer;

		    	chdlc_priv_area->curr_trace_addr = 
					trace_cfg_struct.next_trace_element_to_use;

	    		chdlc_priv_area->available_buffer_space = 2000 - 
								  sizeof(ip_pkt_t) -
								  sizeof(udp_pkt_t) -
							      	  sizeof(wp_mgmt_t) -
								  sizeof(cblock_t) -
							          sizeof(trace_info_t);	
	       	     }
		     chdlc_udp_pkt->cblock.return_code = COMMAND_OK;
		     mb->buffer_length = 0;
	       	     chdlc_priv_area->TracingEnabled = 1;
	       	     break;
	   

		case CPIPE_DISABLE_TRACING:
		     if (chdlc_priv_area->TracingEnabled) {

			/* OPERATE_DATALINE_MONITOR */
			mb->buffer_length = sizeof(LINE_TRACE_CONFIG_STRUCT);
			mb->command = SET_TRACE_CONFIGURATION;
    			((LINE_TRACE_CONFIG_STRUCT *)mb->data)->
				trace_config = TRACE_INACTIVE;
			err = sdla_exec(mb) ? mb->return_code : CMD_TIMEOUT;
		     }		

		     chdlc_priv_area->TracingEnabled = 0;
		     chdlc_udp_pkt->cblock.return_code = COMMAND_OK;
		     mb->buffer_length = 0;
		     break;
	   

		case CPIPE_GET_TRACE_INFO:

		     if (!chdlc_priv_area->TracingEnabled) {
			chdlc_udp_pkt->cblock.return_code = 1;
			mb->buffer_length = 0;
			break;
		     }

  		     chdlc_udp_pkt->trace_info.ismoredata = 0x00;
		     buffer_length = 0;	/* offset of packet already occupied */

		     for (frames=0; frames < chdlc_priv_area->number_trace_elements; frames++){

			trace_pkt_t *trace_pkt = (trace_pkt_t *)
				&chdlc_udp_pkt->data[buffer_length];

			sdla_peek(&card->hw, chdlc_priv_area->curr_trace_addr,
			   	  (unsigned char *)&trace_element_struct,
			   	  sizeof(TRACE_STATUS_ELEMENT_STRUCT));

     			if (trace_element_struct.opp_flag == 0x00) {
			 	break;
			}

			/* get pointer to real data */
			data_ptr = trace_element_struct.ptr_data_bfr;

			/* See if there is actual data on the trace buffer */
			if (data_ptr){
				data_length = trace_element_struct.trace_length;
			}else{
				data_length = 0;
				chdlc_udp_pkt->trace_info.ismoredata = 0x01;
			}
	
   			if( (chdlc_priv_area->available_buffer_space - buffer_length)
				< ( sizeof(trace_pkt_t) + data_length) ) {

                            /* indicate there are more frames on board & exit */
				chdlc_udp_pkt->trace_info.ismoredata = 0x01;
                               	break;
                         }

			trace_pkt->status = trace_element_struct.trace_type;

			trace_pkt->time_stamp =
				trace_element_struct.trace_time_stamp;

			trace_pkt->real_length =
				trace_element_struct.trace_length;

			/* see if we can fit the frame into the user buffer */
			real_len = trace_pkt->real_length;

			if (data_ptr == 0) {
			     	trace_pkt->data_avail = 0x00;
			} else {
				unsigned tmp = 0;

				/* get the data from circular buffer
				    must check for end of buffer */
			        trace_pkt->data_avail = 0x01;

				if ((data_ptr + real_len) >
					     chdlc_priv_area->end_addr_trace_buffer + 1){

				    	tmp = chdlc_priv_area->end_addr_trace_buffer - data_ptr + 1;
				    	sdla_peek(&card->hw, data_ptr,
					       	  trace_pkt->data,tmp);
				    	data_ptr = chdlc_priv_area->base_addr_trace_buffer;
				}
	
		        	sdla_peek(&card->hw, data_ptr,
					  &trace_pkt->data[tmp], real_len - tmp);
			}	

			/* zero the opp flag to show we got the frame */
			ut_char = 0x00;
			sdla_poke(&card->hw, chdlc_priv_area->curr_trace_addr, &ut_char, 1);

       			/* now move onto the next frame */
       			chdlc_priv_area->curr_trace_addr += sizeof(TRACE_STATUS_ELEMENT_STRUCT);

       			/* check if we went over the last address */
			if ( chdlc_priv_area->curr_trace_addr > chdlc_priv_area->end_trace_addr ) {
				chdlc_priv_area->curr_trace_addr = chdlc_priv_area->start_trace_addr;
       			}

            		if(trace_pkt->data_avail == 0x01) {
				buffer_length += real_len - 1;
			}
	 
	       	    	/* for the header */
	            	buffer_length += sizeof(trace_pkt_t);

		     }  /* For Loop */

		     if (frames == chdlc_priv_area->number_trace_elements){
			chdlc_udp_pkt->trace_info.ismoredata = 0x01;
	             }
 		     chdlc_udp_pkt->trace_info.num_frames = frames;
		 
    		     mb->buffer_length = buffer_length;
		     chdlc_udp_pkt->cblock.buffer_length = buffer_length; 
		 
		     chdlc_udp_pkt->cblock.return_code = COMMAND_OK; 
		     
		     break;


		case CPIPE_FT1_READ_STATUS:
			((unsigned char *)chdlc_udp_pkt->data )[0] =
				flags->FT1_info_struct.parallel_port_A_input;

			((unsigned char *)chdlc_udp_pkt->data )[1] =
				flags->FT1_info_struct.parallel_port_B_input;
				 
			chdlc_udp_pkt->cblock.return_code = COMMAND_OK;
			mb->buffer_length = 2;
			break;
		
		case CPIPE_ROUTER_UP_TIME:
			do_gettimeofday( &tv );
			chdlc_priv_area->router_up_time = tv.tv_sec - 
					chdlc_priv_area->router_start_time;
			*(unsigned long *)&chdlc_udp_pkt->data = 
					chdlc_priv_area->router_up_time;	
			mb->buffer_length = sizeof(unsigned long);
			break;

   		case FT1_MONITOR_STATUS_CTRL:
			/* Enable FT1 MONITOR STATUS */
	        	if ((chdlc_udp_pkt->data[0] & ENABLE_READ_FT1_STATUS) ||  
				(chdlc_udp_pkt->data[0] & ENABLE_READ_FT1_OP_STATS)) {
			
			     	if( rCount++ != 0 ) {
					chdlc_udp_pkt->cblock.
					return_code = COMMAND_OK;
					mb->buffer_length = 1;
		  			break;
		    	     	}
	      		}

	      		/* Disable FT1 MONITOR STATUS */
	      		if( chdlc_udp_pkt->data[0] == 0) {

	      	   	     	if( --rCount != 0) {
		  			chdlc_udp_pkt->cblock.
					return_code = COMMAND_OK;
					mb->buffer_length = 1;
		  			break;
	   	    	     	} 
	      		} 	
	
		default:
			/* it's a board command */
			mb->command = chdlc_udp_pkt->cblock.command;
			mb->buffer_length = chdlc_udp_pkt->cblock.buffer_length;
			if (mb->buffer_length) {
				memcpy(&mb->data, (unsigned char *) chdlc_udp_pkt->
							data, mb->buffer_length);
	      		} 
			/* run the command on the board */
			err = sdla_exec(mb) ? mb->return_code : CMD_TIMEOUT;
			if (err != COMMAND_OK) {
				break;
			}

			/* copy the result back to our buffer */
	         	memcpy(&chdlc_udp_pkt->cblock, mb, sizeof(cblock_t)); 
			
			if (mb->buffer_length) {
	         		memcpy(&chdlc_udp_pkt->data, &mb->data, 
								mb->buffer_length); 
	      		}

		} /* end of switch */
     	} /* end of else */

     	/* Fill UDP TTL */
	chdlc_udp_pkt->ip_pkt.ttl = card->wandev.ttl; 

     	len = reply_udp(chdlc_priv_area->udp_pkt_data, mb->buffer_length);
	
     	if(chdlc_priv_area->udp_pkt_src == UDP_PKT_FRM_NETWORK) {
		if(!chdlc_send(card, chdlc_priv_area->udp_pkt_data, len)) {
			++ card->wandev.stats.tx_packets;
#if defined(LINUX_2_1) || defined(LINUX_2_4)
			card->wandev.stats.tx_bytes += len;
#endif
		}
	} else {	
	
		/* Pass it up the stack
    		   Allocate socket buffer */
		if ((new_skb = dev_alloc_skb(len)) != NULL) {
			/* copy data into new_skb */

 	    		buf = skb_put(new_skb, len);
  	    		memcpy(buf, chdlc_priv_area->udp_pkt_data, len);

            		/* Decapsulate pkt and pass it up the protocol stack */
	    		new_skb->protocol = htons(ETH_P_IP);
            		new_skb->dev = dev;
	    		new_skb->mac.raw  = new_skb->data;
	
			netif_rx(new_skb);
		} else {
	    	
			printk(KERN_INFO "%s: no socket buffers available!\n",
					card->devname);
  		}
    	}
 
	chdlc_priv_area->udp_pkt_lgth = 0;
 	
	return 0;
}

/*============================================================================
 * Initialize Receive and Transmit Buffers.
 */

static void init_chdlc_tx_rx_buff( sdla_t* card, netdevice_t *dev )
{
	CHDLC_MAILBOX_STRUCT* mb = card->mbox;
	CHDLC_TX_STATUS_EL_CFG_STRUCT *tx_config;
	CHDLC_RX_STATUS_EL_CFG_STRUCT *rx_config;
	char err;
	
	mb->buffer_length = 0;
	mb->command = READ_CHDLC_CONFIGURATION;
	err = sdla_exec(mb) ? mb->return_code : CMD_TIMEOUT;

	if(err != COMMAND_OK) {
		chdlc_error(card,err,mb);
		return;
	}

	if(card->hw.type == SDLA_S514) {
		tx_config = (CHDLC_TX_STATUS_EL_CFG_STRUCT *)(card->hw.dpmbase +
                (((CHDLC_CONFIGURATION_STRUCT *)mb->data)->
                            ptr_CHDLC_Tx_stat_el_cfg_struct));
        	rx_config = (CHDLC_RX_STATUS_EL_CFG_STRUCT *)(card->hw.dpmbase +
                (((CHDLC_CONFIGURATION_STRUCT *)mb->data)->
                            ptr_CHDLC_Rx_stat_el_cfg_struct));

       		/* Setup Head and Tails for buffers */
        	card->u.c.txbuf_base = (void *)(card->hw.dpmbase +
                tx_config->base_addr_Tx_status_elements);
        	card->u.c.txbuf_last = 
		(CHDLC_DATA_TX_STATUS_EL_STRUCT *)  
                card->u.c.txbuf_base +
		(tx_config->number_Tx_status_elements - 1);

        	card->u.c.rxbuf_base = (void *)(card->hw.dpmbase +
                rx_config->base_addr_Rx_status_elements);
        	card->u.c.rxbuf_last =
		(CHDLC_DATA_RX_STATUS_EL_STRUCT *)
                card->u.c.rxbuf_base +
		(rx_config->number_Rx_status_elements - 1);

 		/* Set up next pointer to be used */
        	card->u.c.txbuf = (void *)(card->hw.dpmbase +
                tx_config->next_Tx_status_element_to_use);
        	card->u.c.rxmb = (void *)(card->hw.dpmbase +
                rx_config->next_Rx_status_element_to_use);
	}
        else {
                tx_config = (CHDLC_TX_STATUS_EL_CFG_STRUCT *)(card->hw.dpmbase +
			(((CHDLC_CONFIGURATION_STRUCT *)mb->data)->
			ptr_CHDLC_Tx_stat_el_cfg_struct % SDLA_WINDOWSIZE));

                rx_config = (CHDLC_RX_STATUS_EL_CFG_STRUCT *)(card->hw.dpmbase +
			(((CHDLC_CONFIGURATION_STRUCT *)mb->data)->
			ptr_CHDLC_Rx_stat_el_cfg_struct % SDLA_WINDOWSIZE));

                /* Setup Head and Tails for buffers */
                card->u.c.txbuf_base = (void *)(card->hw.dpmbase +
		(tx_config->base_addr_Tx_status_elements % SDLA_WINDOWSIZE));
                card->u.c.txbuf_last =
		(CHDLC_DATA_TX_STATUS_EL_STRUCT *)card->u.c.txbuf_base
		+ (tx_config->number_Tx_status_elements - 1);
                card->u.c.rxbuf_base = (void *)(card->hw.dpmbase +
		(rx_config->base_addr_Rx_status_elements % SDLA_WINDOWSIZE));
                card->u.c.rxbuf_last = 
		(CHDLC_DATA_RX_STATUS_EL_STRUCT *)card->u.c.rxbuf_base
		+ (rx_config->number_Rx_status_elements - 1);

                 /* Set up next pointer to be used */
                card->u.c.txbuf = (void *)(card->hw.dpmbase +
		(tx_config->next_Tx_status_element_to_use % SDLA_WINDOWSIZE));
                card->u.c.rxmb = (void *)(card->hw.dpmbase +
		(rx_config->next_Rx_status_element_to_use % SDLA_WINDOWSIZE));
        }

        /* Setup Actual Buffer Start and end addresses */
        card->u.c.rx_base = rx_config->base_addr_Rx_buffer;
        card->u.c.rx_top  = rx_config->end_addr_Rx_buffer;

}

/*=============================================================================
 * Perform Interrupt Test by running READ_CHDLC_CODE_VERSION command MAX_INTR
 * _TEST_COUNTER times.
 */
static int intr_test( sdla_t* card)
{
	CHDLC_MAILBOX_STRUCT* mb = card->mbox;
	int err,i;

	Intr_test_counter = 0;

	/* The critical flag is unset because during intialization (if_open) 
	 * we want the interrupts to be enabled so that when the wpc_isr is
	 * called it does not exit due to critical flag set.
	 */ 

	err = chdlc_set_intr_mode(card, APP_INT_ON_COMMAND_COMPLETE);

	if (err == CMD_OK) { 
		for (i = 0; i < MAX