/alps/pcitool

#define _POSIX_C_SOURCE 199309L

#include <stdio.h>

#include <string.h>

#include <strings.h>

#include <stdlib.h>

#include <stdint.h>

#include <stdarg.h>

#include <fcntl.h>

#include <unistd.h>

#include <sys/ioctl.h>

#include <sys/mman.h>

#include <arpa/inet.h>

#include <errno.h>

#include <assert.h>

#include "pci.h"

#include "tools.h"

#include "error.h"

pcilib_event_t pcilib_find_event(pcilib_t *ctx, const char *event) {

    int i;

    pcilib_register_bank_t res;

    unsigned long addr;

    pcilib_model_description_t *model_info = pcilib_get_model_description(ctx);

    pcilib_event_description_t *events = model_info->events;

    for (i = 0; events[i].name; i++) {

	if (!strcasecmp(events[i].name, event)) return (1<<i);

    }

    return (pcilib_event_t)-1;

}

int pcilib_reset(pcilib_t *ctx) {

    pcilib_event_api_description_t *api;

    pcilib_model_description_t *model_info = pcilib_get_model_description(ctx);

    api = model_info->event_api;

    if (!api) {

	pcilib_error("Event API is not supported by the selected model");

	return PCILIB_ERROR_NOTSUPPORTED;

    }

    if (api->reset) 

	return api->reset(ctx->event_ctx);

    return 0;

}

int pcilib_start(pcilib_t *ctx, pcilib_event_t event_mask, void *callback, void *user) {

    pcilib_event_api_description_t *api;

    pcilib_model_description_t *model_info = pcilib_get_model_description(ctx);

    api = model_info->event_api;

    if (!api) {

	pcilib_error("Event API is not supported by the selected model");

	return PCILIB_ERROR_NOTSUPPORTED;

    }

    if (api->start) 

	return api->start(ctx->event_ctx, event_mask, callback, user);

    return 0;

}

int pcilib_stop(pcilib_t *ctx) {

    pcilib_event_api_description_t *api;

    pcilib_model_description_t *model_info = pcilib_get_model_description(ctx);

    api = model_info->event_api;

    if (!api) {

	pcilib_error("Event API is not supported by the selected model");

	return PCILIB_ERROR_NOTSUPPORTED;

    }

    if (api->stop) 

	return api->stop(ctx->event_ctx);

    return 0;

}

pcilib_event_id_t pcilib_get_next_event(pcilib_t *ctx, pcilib_event_t event_mask, const struct timespec *timeout) {

    pcilib_event_api_description_t *api;

    pcilib_model_description_t *model_info = pcilib_get_model_description(ctx);

    api = model_info->event_api;

    if (!api) {

	pcilib_error("Event API is not supported by the selected model");

	return PCILIB_ERROR_NOTSUPPORTED;

    }

    if (api->next_event) 

	return api->next_event(ctx->event_ctx, event_mask, timeout);

    pcilib_error("Event enumeration is not suppored by API");

    return PCILIB_EVENT_ID_INVALID;

}

int pcilib_trigger(pcilib_t *ctx, pcilib_event_t event, size_t trigger_size, void *trigger_data) {

    pcilib_event_api_description_t *api;

    pcilib_model_description_t *model_info = pcilib_get_model_description(ctx);

    api = model_info->event_api;

    if (!api) {

	pcilib_error("Event API is not supported by the selected model");

	return PCILIB_ERROR_NOTSUPPORTED;

    }

    if (api->trigger) 

	return api->trigger(ctx->event_ctx, event, trigger_size, trigger_data);

    pcilib_error("Self triggering is not supported by the selected model");

    return PCILIB_ERROR_NOTSUPPORTED;

}

void *pcilib_get_data_with_argument(pcilib_t *ctx, pcilib_event_id_t event_id, pcilib_event_data_type_t data_type, size_t arg_size, void *arg, size_t *size) {

    pcilib_model_description_t *model_info = pcilib_get_model_description(ctx);

    pcilib_event_api_description_t *api = model_info->event_api;

    if (!api) {

	pcilib_error("Event API is not supported by the selected model");

	return NULL;

    }

    if (api->get_data) 

	return api->get_data(ctx->event_ctx, event_id, data_type, arg_size, arg, size);

    return NULL;

}

void *pcilib_get_data(pcilib_t *ctx, pcilib_event_id_t event_id, pcilib_event_data_type_t data_type, size_t *size) {

    pcilib_model_description_t *model_info = pcilib_get_model_description(ctx);

    pcilib_event_api_description_t *api = model_info->event_api;

    if (!api) {

	pcilib_error("Event API is not supported by the selected model");

	return NULL;

    }

    if (api->get_data) 

	return api->get_data(ctx->event_ctx, event_id, data_type, 0, NULL, size);

    return NULL;

}

int pcilib_return_data(pcilib_t *ctx, pcilib_event_id_t event_id) {

    pcilib_model_description_t *model_info = pcilib_get_model_description(ctx);

    pcilib_event_api_description_t *api = model_info->event_api;

    if (!api) {

	pcilib_error("Event API is not supported by the selected model");

	return PCILIB_ERROR_NOTSUPPORTED;

    }

    if (api->return_data) 

	return api->return_data(ctx->event_ctx, event_id);

    return 0;

}

typedef struct {

    pcilib_t *ctx;

    size_t *size;

    void **data;

} pcilib_grab_callback_user_data_t;

static int pcilib_grab_callback(pcilib_event_t event, pcilib_event_id_t event_id, void *vuser) {

    int err;

    void *data;

    size_t size;

    int allocated = 0;

    pcilib_grab_callback_user_data_t *user = (pcilib_grab_callback_user_data_t*)vuser;

    data = pcilib_get_data(user->ctx, event_id, PCILIB_EVENT_DATA, &size);

    if (!data) {

	pcilib_error("Error getting event data");

	return PCILIB_ERROR_FAILED;

    }

    if (*(user->data)) {

	if ((user->size)&&(*(user->size) < size)) {

	    pcilib_error("The supplied buffer does not have enough space to hold the event data. Buffer size is %z, but %z is required", user->size, size);

	    return PCILIB_ERROR_MEMORY;

	}

	*(user->size) = size;

    } else {

	*(user->data) = malloc(size);

	if (!*(user->data)) {

	    pcilib_error("Memory allocation (%i bytes) for event data is failed");

	    return PCILIB_ERROR_MEMORY;

	}

	if (*(user->size)) *(user->size) = size;

	allocated = 1;

    }

    memcpy(*(user->data), data, size);

    err = pcilib_return_data(user->ctx, event_id);

    if (err) {

	if (allocated) {

	    free(*(user->data));

	    *(user->data) = NULL;

	}

	pcilib_error("The event data had been overwritten before it was returned, data corruption may occur");

	return err;

    }

    return 0;

}

int pcilib_grab(pcilib_t *ctx, pcilib_event_t event_mask, size_t *size, void **data, const struct timespec *timeout) {

    int err;

    pcilib_grab_callback_user_data_t user = {ctx, size, data};

    err = pcilib_start(ctx, event_mask, pcilib_grab_callback, &user);

    if (!err) {

	if (timeout) nanosleep(timeout, NULL);

        else err = pcilib_trigger(ctx, event_mask, 0, NULL);

    }

    pcilib_stop(ctx);

    return 0;

}