source: mainline/uspace/srv/hw/netif/dp8390/dp8390_module.c@ c2ab3f4

/*
 * Copyright (c) 2009 Lukas Mejdrech
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/** @addtogroup dp8390
 *  @{
 */

/** @file
 *  DP8390 network interface implementation.
 */

#include <assert.h>
#include <async.h>
#include <ddi.h>
#include <errno.h>
#include <malloc.h>
#include <ipc/ipc.h>
#include <ipc/services.h>

#include <net_err.h>
#include <net_messages.h>
#include <net_modules.h>
#include <packet/packet_client.h>
#include <adt/measured_strings.h>
#include <net_device.h>
#include <nil_interface.h>
#include <netif_interface.h>
#include <netif_local.h>

#include "dp8390.h"
#include "dp8390_drv.h"
#include "dp8390_port.h"

/** DP8390 module name.
 */
#define NAME  "dp8390"

/** Returns the device from the interrupt call.
 *  @param[in] call The interrupt call.
 */
#define IRQ_GET_DEVICE(call)                    (device_id_t) IPC_GET_METHOD(*call)

/** Returns the interrupt status register from the interrupt call.
 *  @param[in] call The interrupt call.
 */
#define IPC_GET_ISR(call)                               (int) IPC_GET_ARG2(*call)

/** DP8390 kernel interrupt command sequence.
 */
static irq_cmd_t        dp8390_cmds[] = {
        {       .cmd = CMD_PIO_READ_8,
                .addr = NULL,
                .dstarg = 2
        },
        {
                .cmd = CMD_PREDICATE,
                .value = 1,
                .srcarg = 2
        },
        {
                .cmd = CMD_ACCEPT
        }
};

/** DP8390 kernel interrupt code.
 */
static irq_code_t       dp8390_code = {
        sizeof(dp8390_cmds) / sizeof(irq_cmd_t),
        dp8390_cmds
};

/** Handles the interrupt messages.
 *  This is the interrupt handler callback function.
 *  @param[in] iid The interrupt message identifier.
 *  @param[in] call The interrupt message.
 */
static void irq_handler(ipc_callid_t iid, ipc_call_t * call)
{
        netif_device_t * device;
        dpeth_t * dep;
        packet_t received;
        device_id_t device_id;
        int phone;

        device_id = IRQ_GET_DEVICE(call);
        fibril_rwlock_write_lock(&netif_globals.lock);
        if(find_device(device_id, &device) != EOK){
                fibril_rwlock_write_unlock(&netif_globals.lock);
                return;
        }
        dep = (dpeth_t *) device->specific;
        if (dep->de_mode != DEM_ENABLED){
                fibril_rwlock_write_unlock(&netif_globals.lock);
                return;
        }
        assert(dep->de_flags &DEF_ENABLED);
        dep->de_int_pending = 0;
        dp_check_ints(dep, IPC_GET_ISR(call));
        if(dep->received_queue){
                received = dep->received_queue;
                phone = device->nil_phone;
                dep->received_queue = NULL;
                dep->received_count = 0;
                fibril_rwlock_write_unlock(&netif_globals.lock);
                nil_received_msg(phone, device_id, received, NULL);
        }else{
                fibril_rwlock_write_unlock(&netif_globals.lock);
        }
        ipc_answer_0(iid, EOK);
}

/** Changes the network interface state.
 *  @param[in,out] device The network interface.
 *  @param[in] state The new state.
 *  @returns The new state.
 */
static int change_state(netif_device_t * device, device_state_t state)
{
        if (device->state != state) {
                device->state = state;
                
                printf("%s: State changed to %s\n", NAME,
                    (state == NETIF_ACTIVE) ? "active" : "stopped");
                
                return state;
        }
        
        return EOK;
}

int netif_specific_message(ipc_callid_t callid, ipc_call_t * call, ipc_call_t * answer, int * answer_count){
        return ENOTSUP;
}

int netif_get_device_stats(device_id_t device_id, device_stats_ref stats){
        ERROR_DECLARE;

        netif_device_t * device;
        eth_stat_t * de_stat;

        if(! stats){
                return EBADMEM;
        }
        ERROR_PROPAGATE(find_device(device_id, &device));
        de_stat = &((dpeth_t *) device->specific)->de_stat;
        null_device_stats(stats);
        stats->receive_errors = de_stat->ets_recvErr;
        stats->send_errors = de_stat->ets_sendErr;
        stats->receive_crc_errors = de_stat->ets_CRCerr;
        stats->receive_frame_errors = de_stat->ets_frameAll;
        stats->receive_missed_errors = de_stat->ets_missedP;
        stats->receive_packets = de_stat->ets_packetR;
        stats->send_packets = de_stat->ets_packetT;
        stats->collisions = de_stat->ets_collision;
        stats->send_aborted_errors = de_stat->ets_transAb;
        stats->send_carrier_errors = de_stat->ets_carrSense;
        stats->send_heartbeat_errors = de_stat->ets_CDheartbeat;
        stats->send_window_errors = de_stat->ets_OWC;
        return EOK;
}

int netif_get_addr_message(device_id_t device_id, measured_string_ref address){
        ERROR_DECLARE;

        netif_device_t * device;

        if(! address){
                return EBADMEM;
        }
        ERROR_PROPAGATE(find_device(device_id, &device));
        address->value = (char *) (&((dpeth_t *) device->specific)->de_address);
        address->length = CONVERT_SIZE(ether_addr_t, char, 1);
        return EOK;
}



int netif_probe_message(device_id_t device_id, int irq, uintptr_t io){
        ERROR_DECLARE;

        netif_device_t * device;
        dpeth_t * dep;

        device = (netif_device_t *) malloc(sizeof(netif_device_t));
        if(! device){
                return ENOMEM;
        }
        dep = (dpeth_t *) malloc(sizeof(dpeth_t));
        if(! dep){
                free(device);
                return ENOMEM;
        }
        bzero(device, sizeof(netif_device_t));
        bzero(dep, sizeof(dpeth_t));
        device->device_id = device_id;
        device->nil_phone = -1;
        device->specific = (void *) dep;
        device->state = NETIF_STOPPED;
        dep->de_irq = irq;
        dep->de_mode = DEM_DISABLED;
        //TODO address?
        if(ERROR_OCCURRED(pio_enable((void *) io, DP8390_IO_SIZE, (void **) &dep->de_base_port))
                || ERROR_OCCURRED(do_probe(dep))){
                free(dep);
                free(device);
                return ERROR_CODE;
        }
        if(ERROR_OCCURRED(netif_device_map_add(&netif_globals.device_map, device->device_id, device))){
                free(dep);
                free(device);
                return ERROR_CODE;
        }
        return EOK;
}

int netif_send_message(device_id_t device_id, packet_t packet, services_t sender){
        ERROR_DECLARE;

        netif_device_t * device;
        dpeth_t * dep;
        packet_t next;

        ERROR_PROPAGATE(find_device(device_id, &device));
        if(device->state != NETIF_ACTIVE){
                netif_pq_release(packet_get_id(packet));
                return EFORWARD;
        }
        dep = (dpeth_t *) device->specific;
        // process packet queue
        do{
                next = pq_detach(packet);
                if(do_pwrite(dep, packet, FALSE) != EBUSY){
                        netif_pq_release(packet_get_id(packet));
                }
                packet = next;
        }while(packet);
        return EOK;
}

int netif_start_message(netif_device_t * device){
        ERROR_DECLARE;

        dpeth_t * dep;

        if(device->state != NETIF_ACTIVE){
                dep = (dpeth_t *) device->specific;
                dp8390_cmds[0].addr = (void *) (uintptr_t) (dep->de_dp8390_port + DP_ISR);
                dp8390_cmds[2].addr = dp8390_cmds[0].addr;
                ERROR_PROPAGATE(ipc_register_irq(dep->de_irq, device->device_id, device->device_id, &dp8390_code));
                if(ERROR_OCCURRED(do_init(dep, DL_BROAD_REQ))){
                        ipc_unregister_irq(dep->de_irq, device->device_id);
                        return ERROR_CODE;
                }
                return change_state(device, NETIF_ACTIVE);
        }
        return EOK;
}

int netif_stop_message(netif_device_t * device){
        dpeth_t * dep;

        if(device->state != NETIF_STOPPED){
                dep = (dpeth_t *) device->specific;
                do_stop(dep);
                ipc_unregister_irq(dep->de_irq, device->device_id);
                return change_state(device, NETIF_STOPPED);
        }
        return EOK;
}

int netif_initialize(void){
        ipcarg_t phonehash;

        async_set_interrupt_received(irq_handler);

        return REGISTER_ME(SERVICE_DP8390, &phonehash);
}

/** Default thread for new connections.
 *
 *  @param[in] iid The initial message identifier.
 *  @param[in] icall The initial message call structure.
 *
 */
static void netif_client_connection(ipc_callid_t iid, ipc_call_t * icall)
{
        /*
         * Accept the connection
         *  - Answer the first IPC_M_CONNECT_ME_TO call.
         */
        ipc_answer_0(iid, EOK);
        
        while(true) {
                ipc_call_t answer;
                int answer_count;
                
                /* Clear the answer structure */
                refresh_answer(&answer, &answer_count);
                
                /* Fetch the next message */
                ipc_call_t call;
                ipc_callid_t callid = async_get_call(&call);
                
                /* Process the message */
                int res = netif_module_message(NAME, callid, &call, &answer,
                    &answer_count);
                
                /* End if said to either by the message or the processing result */
                if ((IPC_GET_METHOD(call) == IPC_M_PHONE_HUNGUP) || (res == EHANGUP))
                        return;
                
                /* Answer the message */
                answer_call(callid, res, &answer, answer_count);
        }
}

/** Starts the module.
 *
 *  @param argc The count of the command line arguments. Ignored parameter.
 *  @param argv The command line parameters. Ignored parameter.
 *
 *  @returns EOK on success.
 *  @returns Other error codes as defined for each specific module start function.
 *
 */
int main(int argc, char *argv[])
{
        ERROR_DECLARE;
        
        /* Start the module */
        if (ERROR_OCCURRED(netif_module_start(netif_client_connection)))
                return ERROR_CODE;
        
        return EOK;
}

/** @}
 */